Adding upstream version 115.7.0esr.upstream/115.7.0esr

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

69 files changed, 41078 insertions, 0 deletions

diff --git a/third_party/rust/object/src/archive.rs b/third_party/rust/object/src/archive.rs
new file mode 100644
index 0000000000..6271d07360
--- /dev/null
+++ b/third_party/rust/object/src/archive.rs
@@ -0,0 +1,91 @@
+//! Archive definitions.
+//!
+//! These definitions are independent of read/write support, although we do implement
+//! some traits useful for those.
+
+use crate::pod::Pod;
+
+/// File identification bytes stored at the beginning of the file.
+pub const MAGIC: [u8; 8] = *b"!<arch>\n";
+
+/// File identification bytes at the beginning of AIX big archive.
+pub const AIX_BIG_MAGIC: [u8; 8] = *b"<bigaf>\n";
+
+/// File identification bytes stored at the beginning of a thin archive.
+///
+/// A thin archive only contains a symbol table and file names.
+pub const THIN_MAGIC: [u8; 8] = *b"!<thin>\n";
+
+/// The terminator for each archive member header.
+pub const TERMINATOR: [u8; 2] = *b"`\n";
+
+/// The header at the start of an archive member.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct Header {
+    /// The file name.
+    pub name: [u8; 16],
+    /// File modification timestamp in decimal.
+    pub date: [u8; 12],
+    /// User ID in decimal.
+    pub uid: [u8; 6],
+    /// Group ID in decimal.
+    pub gid: [u8; 6],
+    /// File mode in octal.
+    pub mode: [u8; 8],
+    /// File size in decimal.
+    pub size: [u8; 10],
+    /// Must be equal to `TERMINATOR`.
+    pub terminator: [u8; 2],
+}
+
+/// The header at the start of an AIX big archive member, without name.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct AixHeader {
+    /// File member size in decimal.
+    pub size: [u8; 20],
+    /// Next member offset in decimal.
+    pub nxtmem: [u8; 20],
+    /// Previous member offset in decimal.
+    pub prvmem: [u8; 20],
+    /// File member date in decimal.
+    pub date: [u8; 12],
+    /// File member user id in decimal.
+    pub uid: [u8; 12],
+    /// File member group id in decimal.
+    pub gid: [u8; 12],
+    /// File member mode in octal.
+    pub mode: [u8; 12],
+    /// File member name length in decimal.
+    pub namlen: [u8; 4],
+}
+
+/// The AIX big archive's fixed length header at file beginning.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct AixFileHeader {
+    /// Archive magic string.
+    pub magic: [u8; 8],
+    /// Offset of member table.
+    pub memoff: [u8; 20],
+    /// Offset of global symbol table.
+    pub gstoff: [u8; 20],
+    /// Offset of global symbol table for 64-bit objects.
+    pub gst64off: [u8; 20],
+    /// Offset of first member.
+    pub fstmoff: [u8; 20],
+    /// Offset of last member.
+    pub lstmoff: [u8; 20],
+    /// Offset of first member on free list.
+    pub freeoff: [u8; 20],
+}
+
+/// Offset of a member in an AIX big archive.
+///
+/// This is used in the member index.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct AixMemberOffset(pub [u8; 20]);
+
+unsafe_impl_pod!(Header, AixHeader, AixFileHeader, AixMemberOffset,);
diff --git a/third_party/rust/object/src/common.rs b/third_party/rust/object/src/common.rs
new file mode 100644
index 0000000000..9150834222
--- /dev/null
+++ b/third_party/rust/object/src/common.rs
@@ -0,0 +1,480 @@
+/// A CPU architecture.
+#[allow(missing_docs)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+#[non_exhaustive]
+pub enum Architecture {
+    Unknown,
+    Aarch64,
+    #[allow(non_camel_case_types)]
+    Aarch64_Ilp32,
+    Arm,
+    Avr,
+    Bpf,
+    I386,
+    X86_64,
+    #[allow(non_camel_case_types)]
+    X86_64_X32,
+    Hexagon,
+    LoongArch64,
+    Mips,
+    Mips64,
+    Msp430,
+    PowerPc,
+    PowerPc64,
+    Riscv32,
+    Riscv64,
+    S390x,
+    Sbf,
+    Sparc64,
+    Wasm32,
+    Xtensa,
+}
+
+impl Architecture {
+    /// The size of an address value for this architecture.
+    ///
+    /// Returns `None` for unknown architectures.
+    pub fn address_size(self) -> Option<AddressSize> {
+        match self {
+            Architecture::Unknown => None,
+            Architecture::Aarch64 => Some(AddressSize::U64),
+            Architecture::Aarch64_Ilp32 => Some(AddressSize::U32),
+            Architecture::Arm => Some(AddressSize::U32),
+            Architecture::Avr => Some(AddressSize::U8),
+            Architecture::Bpf => Some(AddressSize::U64),
+            Architecture::I386 => Some(AddressSize::U32),
+            Architecture::X86_64 => Some(AddressSize::U64),
+            Architecture::X86_64_X32 => Some(AddressSize::U32),
+            Architecture::Hexagon => Some(AddressSize::U32),
+            Architecture::LoongArch64 => Some(AddressSize::U64),
+            Architecture::Mips => Some(AddressSize::U32),
+            Architecture::Mips64 => Some(AddressSize::U64),
+            Architecture::Msp430 => Some(AddressSize::U16),
+            Architecture::PowerPc => Some(AddressSize::U32),
+            Architecture::PowerPc64 => Some(AddressSize::U64),
+            Architecture::Riscv32 => Some(AddressSize::U32),
+            Architecture::Riscv64 => Some(AddressSize::U64),
+            Architecture::S390x => Some(AddressSize::U64),
+            Architecture::Sbf => Some(AddressSize::U64),
+            Architecture::Sparc64 => Some(AddressSize::U64),
+            Architecture::Wasm32 => Some(AddressSize::U32),
+            Architecture::Xtensa => Some(AddressSize::U32),
+        }
+    }
+}
+
+/// The size of an address value for an architecture.
+///
+/// This may differ from the address size supported by the file format (such as for COFF).
+#[allow(missing_docs)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+#[non_exhaustive]
+#[repr(u8)]
+pub enum AddressSize {
+    U8 = 1,
+    U16 = 2,
+    U32 = 4,
+    U64 = 8,
+}
+
+impl AddressSize {
+    /// The size in bytes of an address value.
+    #[inline]
+    pub fn bytes(self) -> u8 {
+        self as u8
+    }
+}
+
+/// A binary file format.
+#[allow(missing_docs)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+#[non_exhaustive]
+pub enum BinaryFormat {
+    Coff,
+    Elf,
+    MachO,
+    Pe,
+    Wasm,
+    Xcoff,
+}
+
+/// The kind of a section.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+#[non_exhaustive]
+pub enum SectionKind {
+    /// The section kind is unknown.
+    Unknown,
+    /// An executable code section.
+    ///
+    /// Example ELF sections: `.text`
+    ///
+    /// Example Mach-O sections: `__TEXT/__text`
+    Text,
+    /// A data section.
+    ///
+    /// Example ELF sections: `.data`
+    ///
+    /// Example Mach-O sections: `__DATA/__data`
+    Data,
+    /// A read only data section.
+    ///
+    /// Example ELF sections: `.rodata`
+    ///
+    /// Example Mach-O sections: `__TEXT/__const`, `__DATA/__const`, `__TEXT/__literal4`
+    ReadOnlyData,
+    /// A read only data section with relocations.
+    ///
+    /// This is the same as either `Data` or `ReadOnlyData`, depending on the file format.
+    /// This value is only used in the API for writing files. It is never returned when reading files.
+    ReadOnlyDataWithRel,
+    /// A loadable string section.
+    ///
+    /// Example ELF sections: `.rodata.str`
+    ///
+    /// Example Mach-O sections: `__TEXT/__cstring`
+    ReadOnlyString,
+    /// An uninitialized data section.
+    ///
+    /// Example ELF sections: `.bss`
+    ///
+    /// Example Mach-O sections: `__DATA/__bss`
+    UninitializedData,
+    /// An uninitialized common data section.
+    ///
+    /// Example Mach-O sections: `__DATA/__common`
+    Common,
+    /// A TLS data section.
+    ///
+    /// Example ELF sections: `.tdata`
+    ///
+    /// Example Mach-O sections: `__DATA/__thread_data`
+    Tls,
+    /// An uninitialized TLS data section.
+    ///
+    /// Example ELF sections: `.tbss`
+    ///
+    /// Example Mach-O sections: `__DATA/__thread_bss`
+    UninitializedTls,
+    /// A TLS variables section.
+    ///
+    /// This contains TLS variable structures, rather than the variable initializers.
+    ///
+    /// Example Mach-O sections: `__DATA/__thread_vars`
+    TlsVariables,
+    /// A non-loadable string section.
+    ///
+    /// Example ELF sections: `.comment`, `.debug_str`
+    OtherString,
+    /// Some other non-loadable section.
+    ///
+    /// Example ELF sections: `.debug_info`
+    Other,
+    /// Debug information.
+    ///
+    /// Example Mach-O sections: `__DWARF/__debug_info`
+    Debug,
+    /// Information for the linker.
+    ///
+    /// Example COFF sections: `.drectve`
+    Linker,
+    /// ELF note section.
+    Note,
+    /// Metadata such as symbols or relocations.
+    ///
+    /// Example ELF sections: `.symtab`, `.strtab`, `.group`
+    Metadata,
+    /// Some other ELF section type.
+    ///
+    /// This is the `sh_type` field in the section header.
+    /// The meaning may be dependent on the architecture.
+    Elf(u32),
+}
+
+impl SectionKind {
+    /// Return true if this section contains zerofill data.
+    pub fn is_bss(self) -> bool {
+        self == SectionKind::UninitializedData
+            || self == SectionKind::UninitializedTls
+            || self == SectionKind::Common
+    }
+}
+
+/// The selection kind for a COMDAT section group.
+///
+/// This determines the way in which the linker resolves multiple definitions of the COMDAT
+/// sections.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+#[non_exhaustive]
+pub enum ComdatKind {
+    /// The selection kind is unknown.
+    Unknown,
+    /// Multiple definitions are allowed.
+    ///
+    /// An arbitrary definition is selected, and the rest are removed.
+    ///
+    /// This is the only supported selection kind for ELF.
+    Any,
+    /// Multiple definitions are not allowed.
+    ///
+    /// This is used to group sections without allowing duplicates.
+    NoDuplicates,
+    /// Multiple definitions must have the same size.
+    ///
+    /// An arbitrary definition is selected, and the rest are removed.
+    SameSize,
+    /// Multiple definitions must match exactly.
+    ///
+    /// An arbitrary definition is selected, and the rest are removed.
+    ExactMatch,
+    /// Multiple definitions are allowed, and the largest is selected.
+    ///
+    /// An arbitrary definition with the largest size is selected, and the rest are removed.
+    Largest,
+    /// Multiple definitions are allowed, and the newest is selected.
+    Newest,
+}
+
+/// The kind of a symbol.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+#[non_exhaustive]
+pub enum SymbolKind {
+    /// The symbol kind is unknown.
+    Unknown,
+    /// The symbol is a null placeholder.
+    Null,
+    /// The symbol is for executable code.
+    Text,
+    /// The symbol is for a data object.
+    Data,
+    /// The symbol is for a section.
+    Section,
+    /// The symbol is the name of a file. It precedes symbols within that file.
+    File,
+    /// The symbol is for a code label.
+    Label,
+    /// The symbol is for a thread local storage entity.
+    Tls,
+}
+
+/// A symbol scope.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub enum SymbolScope {
+    /// Unknown scope.
+    Unknown,
+    /// Symbol is visible to the compilation unit.
+    Compilation,
+    /// Symbol is visible to the static linkage unit.
+    Linkage,
+    /// Symbol is visible to dynamically linked objects.
+    Dynamic,
+}
+
+/// The operation used to calculate the result of the relocation.
+///
+/// The relocation descriptions use the following definitions. Note that
+/// these definitions probably don't match any ELF ABI.
+///
+/// * A - The value of the addend.
+/// * G - The address of the symbol's entry within the global offset table.
+/// * L - The address of the symbol's entry within the procedure linkage table.
+/// * P - The address of the place of the relocation.
+/// * S - The address of the symbol.
+/// * GotBase - The address of the global offset table.
+/// * Image - The base address of the image.
+/// * Section - The address of the section containing the symbol.
+///
+/// 'XxxRelative' means 'Xxx + A - P'.  'XxxOffset' means 'S + A - Xxx'.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+#[non_exhaustive]
+pub enum RelocationKind {
+    /// S + A
+    Absolute,
+    /// S + A - P
+    Relative,
+    /// G + A - GotBase
+    Got,
+    /// G + A - P
+    GotRelative,
+    /// GotBase + A - P
+    GotBaseRelative,
+    /// S + A - GotBase
+    GotBaseOffset,
+    /// L + A - P
+    PltRelative,
+    /// S + A - Image
+    ImageOffset,
+    /// S + A - Section
+    SectionOffset,
+    /// The index of the section containing the symbol.
+    SectionIndex,
+    /// Some other ELF relocation. The value is dependent on the architecture.
+    Elf(u32),
+    /// Some other Mach-O relocation. The value is dependent on the architecture.
+    MachO {
+        /// The relocation type.
+        value: u8,
+        /// Whether the relocation is relative to the place.
+        relative: bool,
+    },
+    /// Some other COFF relocation. The value is dependent on the architecture.
+    Coff(u16),
+    /// Some other XCOFF relocation.
+    Xcoff(u8),
+}
+
+/// Information about how the result of the relocation operation is encoded in the place.
+///
+/// This is usually architecture specific, such as specifying an addressing mode or
+/// a specific instruction.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+#[non_exhaustive]
+pub enum RelocationEncoding {
+    /// Generic encoding.
+    Generic,
+
+    /// x86 sign extension at runtime.
+    ///
+    /// Used with `RelocationKind::Absolute`.
+    X86Signed,
+    /// x86 rip-relative addressing.
+    ///
+    /// The `RelocationKind` must be PC relative.
+    X86RipRelative,
+    /// x86 rip-relative addressing in movq instruction.
+    ///
+    /// The `RelocationKind` must be PC relative.
+    X86RipRelativeMovq,
+    /// x86 branch instruction.
+    ///
+    /// The `RelocationKind` must be PC relative.
+    X86Branch,
+
+    /// s390x PC-relative offset shifted right by one bit.
+    ///
+    /// The `RelocationKind` must be PC relative.
+    S390xDbl,
+
+    /// AArch64 call target.
+    ///
+    /// The `RelocationKind` must be PC relative.
+    AArch64Call,
+
+    /// LoongArch branch offset with two trailing zeros.
+    ///
+    /// The `RelocationKind` must be PC relative.
+    LoongArchBranch,
+}
+
+/// File flags that are specific to each file format.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+#[non_exhaustive]
+pub enum FileFlags {
+    /// No file flags.
+    None,
+    /// ELF file flags.
+    Elf {
+        /// `os_abi` field in the ELF file header.
+        os_abi: u8,
+        /// `abi_version` field in the ELF file header.
+        abi_version: u8,
+        /// `e_flags` field in the ELF file header.
+        e_flags: u32,
+    },
+    /// Mach-O file flags.
+    MachO {
+        /// `flags` field in the Mach-O file header.
+        flags: u32,
+    },
+    /// COFF file flags.
+    Coff {
+        /// `Characteristics` field in the COFF file header.
+        characteristics: u16,
+    },
+    /// XCOFF file flags.
+    Xcoff {
+        /// `f_flags` field in the XCOFF file header.
+        f_flags: u16,
+    },
+}
+
+/// Segment flags that are specific to each file format.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+#[non_exhaustive]
+pub enum SegmentFlags {
+    /// No segment flags.
+    None,
+    /// ELF segment flags.
+    Elf {
+        /// `p_flags` field in the segment header.
+        p_flags: u32,
+    },
+    /// Mach-O segment flags.
+    MachO {
+        /// `flags` field in the segment header.
+        flags: u32,
+        /// `maxprot` field in the segment header.
+        maxprot: u32,
+        /// `initprot` field in the segment header.
+        initprot: u32,
+    },
+    /// COFF segment flags.
+    Coff {
+        /// `Characteristics` field in the segment header.
+        characteristics: u32,
+    },
+}
+
+/// Section flags that are specific to each file format.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+#[non_exhaustive]
+pub enum SectionFlags {
+    /// No section flags.
+    None,
+    /// ELF section flags.
+    Elf {
+        /// `sh_flags` field in the section header.
+        sh_flags: u64,
+    },
+    /// Mach-O section flags.
+    MachO {
+        /// `flags` field in the section header.
+        flags: u32,
+    },
+    /// COFF section flags.
+    Coff {
+        /// `Characteristics` field in the section header.
+        characteristics: u32,
+    },
+    /// XCOFF section flags.
+    Xcoff {
+        /// `s_flags` field in the section header.
+        s_flags: u32,
+    },
+}
+
+/// Symbol flags that are specific to each file format.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+#[non_exhaustive]
+pub enum SymbolFlags<Section> {
+    /// No symbol flags.
+    None,
+    /// ELF symbol flags.
+    Elf {
+        /// `st_info` field in the ELF symbol.
+        st_info: u8,
+        /// `st_other` field in the ELF symbol.
+        st_other: u8,
+    },
+    /// Mach-O symbol flags.
+    MachO {
+        /// `n_desc` field in the Mach-O symbol.
+        n_desc: u16,
+    },
+    /// COFF flags for a section symbol.
+    CoffSection {
+        /// `Selection` field in the auxiliary symbol for the section.
+        selection: u8,
+        /// `Number` field in the auxiliary symbol for the section.
+        associative_section: Option<Section>,
+    },
+}
diff --git a/third_party/rust/object/src/elf.rs b/third_party/rust/object/src/elf.rs
new file mode 100644
index 0000000000..edbfd9e3db
--- /dev/null
+++ b/third_party/rust/object/src/elf.rs
@@ -0,0 +1,6751 @@
+//! ELF definitions.
+//!
+//! These definitions are independent of read/write support, although we do implement
+//! some traits useful for those.
+//!
+//! This module is the equivalent of /usr/include/elf.h, and is based heavily on it.
+
+#![allow(clippy::identity_op)]
+
+use crate::endian::{Endian, U32Bytes, U64Bytes, I32, I64, U16, U32, U64};
+use crate::pod::Pod;
+
+/// The header at the start of every 32-bit ELF file.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct FileHeader32<E: Endian> {
+    /// Magic number and other information.
+    pub e_ident: Ident,
+    /// Object file type. One of the `ET_*` constants.
+    pub e_type: U16<E>,
+    /// Architecture. One of the `EM_*` constants.
+    pub e_machine: U16<E>,
+    /// Object file version. Must be `EV_CURRENT`.
+    pub e_version: U32<E>,
+    /// Entry point virtual address.
+    pub e_entry: U32<E>,
+    /// Program header table file offset.
+    pub e_phoff: U32<E>,
+    /// Section header table file offset.
+    pub e_shoff: U32<E>,
+    /// Processor-specific flags.
+    ///
+    /// A combination of the `EF_*` constants.
+    pub e_flags: U32<E>,
+    /// Size in bytes of this header.
+    pub e_ehsize: U16<E>,
+    /// Program header table entry size.
+    pub e_phentsize: U16<E>,
+    /// Program header table entry count.
+    ///
+    /// If the count is greater than or equal to `PN_XNUM` then this field is set to
+    /// `PN_XNUM` and the count is stored in the `sh_info` field of section 0.
+    pub e_phnum: U16<E>,
+    /// Section header table entry size.
+    pub e_shentsize: U16<E>,
+    /// Section header table entry count.
+    ///
+    /// If the count is greater than or equal to `SHN_LORESERVE` then this field is set to
+    /// `0` and the count is stored in the `sh_size` field of section 0.
+    /// first section header.
+    pub e_shnum: U16<E>,
+    /// Section header string table index.
+    ///
+    /// If the index is greater than or equal to `SHN_LORESERVE` then this field is set to
+    /// `SHN_XINDEX` and the index is stored in the `sh_link` field of section 0.
+    pub e_shstrndx: U16<E>,
+}
+
+/// The header at the start of every 64-bit ELF file.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct FileHeader64<E: Endian> {
+    /// Magic number and other information.
+    pub e_ident: Ident,
+    /// Object file type. One of the `ET_*` constants.
+    pub e_type: U16<E>,
+    /// Architecture. One of the `EM_*` constants.
+    pub e_machine: U16<E>,
+    /// Object file version. Must be `EV_CURRENT`.
+    pub e_version: U32<E>,
+    /// Entry point virtual address.
+    pub e_entry: U64<E>,
+    /// Program header table file offset.
+    pub e_phoff: U64<E>,
+    /// Section header table file offset.
+    pub e_shoff: U64<E>,
+    /// Processor-specific flags.
+    ///
+    /// A combination of the `EF_*` constants.
+    pub e_flags: U32<E>,
+    /// Size in bytes of this header.
+    pub e_ehsize: U16<E>,
+    /// Program header table entry size.
+    pub e_phentsize: U16<E>,
+    /// Program header table entry count.
+    ///
+    /// If the count is greater than or equal to `PN_XNUM` then this field is set to
+    /// `PN_XNUM` and the count is stored in the `sh_info` field of section 0.
+    pub e_phnum: U16<E>,
+    /// Section header table entry size.
+    pub e_shentsize: U16<E>,
+    /// Section header table entry count.
+    ///
+    /// If the count is greater than or equal to `SHN_LORESERVE` then this field is set to
+    /// `0` and the count is stored in the `sh_size` field of section 0.
+    /// first section header.
+    pub e_shnum: U16<E>,
+    /// Section header string table index.
+    ///
+    /// If the index is greater than or equal to `SHN_LORESERVE` then this field is set to
+    /// `SHN_XINDEX` and the index is stored in the `sh_link` field of section 0.
+    pub e_shstrndx: U16<E>,
+}
+
+/// Magic number and other information.
+///
+/// Contained in the file header.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct Ident {
+    /// Magic number. Must be `ELFMAG`.
+    pub magic: [u8; 4],
+    /// File class. One of the `ELFCLASS*` constants.
+    pub class: u8,
+    /// Data encoding. One of the `ELFDATA*` constants.
+    pub data: u8,
+    /// ELF version. Must be `EV_CURRENT`.
+    pub version: u8,
+    /// OS ABI identification. One of the `ELFOSABI*` constants.
+    pub os_abi: u8,
+    /// ABI version.
+    ///
+    /// The meaning of this field depends on the `os_abi` value.
+    pub abi_version: u8,
+    /// Padding bytes.
+    pub padding: [u8; 7],
+}
+
+/// File identification bytes stored in `Ident::magic`.
+pub const ELFMAG: [u8; 4] = [0x7f, b'E', b'L', b'F'];
+
+// Values for `Ident::class`.
+/// Invalid class.
+pub const ELFCLASSNONE: u8 = 0;
+/// 32-bit object.
+pub const ELFCLASS32: u8 = 1;
+/// 64-bit object.
+pub const ELFCLASS64: u8 = 2;
+
+// Values for `Ident::data`.
+/// Invalid data encoding.
+pub const ELFDATANONE: u8 = 0;
+/// 2's complement, little endian.
+pub const ELFDATA2LSB: u8 = 1;
+/// 2's complement, big endian.
+pub const ELFDATA2MSB: u8 = 2;
+
+// Values for `Ident::os_abi`.
+/// UNIX System V ABI.
+pub const ELFOSABI_NONE: u8 = 0;
+/// UNIX System V ABI.
+///
+/// Alias.
+pub const ELFOSABI_SYSV: u8 = 0;
+/// HP-UX.
+pub const ELFOSABI_HPUX: u8 = 1;
+/// NetBSD.
+pub const ELFOSABI_NETBSD: u8 = 2;
+/// Object uses GNU ELF extensions.
+pub const ELFOSABI_GNU: u8 = 3;
+/// Object uses GNU ELF extensions.
+///
+/// Compatibility alias.
+pub const ELFOSABI_LINUX: u8 = ELFOSABI_GNU;
+/// GNU/Hurd.
+pub const ELFOSABI_HURD: u8 = 4;
+/// Sun Solaris.
+pub const ELFOSABI_SOLARIS: u8 = 6;
+/// IBM AIX.
+pub const ELFOSABI_AIX: u8 = 7;
+/// SGI Irix.
+pub const ELFOSABI_IRIX: u8 = 8;
+/// FreeBSD.
+pub const ELFOSABI_FREEBSD: u8 = 9;
+/// Compaq TRU64 UNIX.
+pub const ELFOSABI_TRU64: u8 = 10;
+/// Novell Modesto.
+pub const ELFOSABI_MODESTO: u8 = 11;
+/// OpenBSD.
+pub const ELFOSABI_OPENBSD: u8 = 12;
+/// OpenVMS.
+pub const ELFOSABI_OPENVMS: u8 = 13;
+/// Hewlett-Packard Non-Stop Kernel.
+pub const ELFOSABI_NSK: u8 = 14;
+/// AROS
+pub const ELFOSABI_AROS: u8 = 15;
+/// FenixOS
+pub const ELFOSABI_FENIXOS: u8 = 16;
+/// Nuxi CloudABI
+pub const ELFOSABI_CLOUDABI: u8 = 17;
+/// ARM EABI.
+pub const ELFOSABI_ARM_AEABI: u8 = 64;
+/// ARM.
+pub const ELFOSABI_ARM: u8 = 97;
+/// Standalone (embedded) application.
+pub const ELFOSABI_STANDALONE: u8 = 255;
+
+// Values for `FileHeader*::e_type`.
+/// No file type.
+pub const ET_NONE: u16 = 0;
+/// Relocatable file.
+pub const ET_REL: u16 = 1;
+/// Executable file.
+pub const ET_EXEC: u16 = 2;
+/// Shared object file.
+pub const ET_DYN: u16 = 3;
+/// Core file.
+pub const ET_CORE: u16 = 4;
+/// OS-specific range start.
+pub const ET_LOOS: u16 = 0xfe00;
+/// OS-specific range end.
+pub const ET_HIOS: u16 = 0xfeff;
+/// Processor-specific range start.
+pub const ET_LOPROC: u16 = 0xff00;
+/// Processor-specific range end.
+pub const ET_HIPROC: u16 = 0xffff;
+
+// Values for `FileHeader*::e_machine`.
+/// No machine
+pub const EM_NONE: u16 = 0;
+/// AT&T WE 32100
+pub const EM_M32: u16 = 1;
+/// SUN SPARC
+pub const EM_SPARC: u16 = 2;
+/// Intel 80386
+pub const EM_386: u16 = 3;
+/// Motorola m68k family
+pub const EM_68K: u16 = 4;
+/// Motorola m88k family
+pub const EM_88K: u16 = 5;
+/// Intel MCU
+pub const EM_IAMCU: u16 = 6;
+/// Intel 80860
+pub const EM_860: u16 = 7;
+/// MIPS R3000 big-endian
+pub const EM_MIPS: u16 = 8;
+/// IBM System/370
+pub const EM_S370: u16 = 9;
+/// MIPS R3000 little-endian
+pub const EM_MIPS_RS3_LE: u16 = 10;
+/// HPPA
+pub const EM_PARISC: u16 = 15;
+/// Fujitsu VPP500
+pub const EM_VPP500: u16 = 17;
+/// Sun's "v8plus"
+pub const EM_SPARC32PLUS: u16 = 18;
+/// Intel 80960
+pub const EM_960: u16 = 19;
+/// PowerPC
+pub const EM_PPC: u16 = 20;
+/// PowerPC 64-bit
+pub const EM_PPC64: u16 = 21;
+/// IBM S390
+pub const EM_S390: u16 = 22;
+/// IBM SPU/SPC
+pub const EM_SPU: u16 = 23;
+/// NEC V800 series
+pub const EM_V800: u16 = 36;
+/// Fujitsu FR20
+pub const EM_FR20: u16 = 37;
+/// TRW RH-32
+pub const EM_RH32: u16 = 38;
+/// Motorola RCE
+pub const EM_RCE: u16 = 39;
+/// ARM
+pub const EM_ARM: u16 = 40;
+/// Digital Alpha
+pub const EM_FAKE_ALPHA: u16 = 41;
+/// Hitachi SH
+pub const EM_SH: u16 = 42;
+/// SPARC v9 64-bit
+pub const EM_SPARCV9: u16 = 43;
+/// Siemens Tricore
+pub const EM_TRICORE: u16 = 44;
+/// Argonaut RISC Core
+pub const EM_ARC: u16 = 45;
+/// Hitachi H8/300
+pub const EM_H8_300: u16 = 46;
+/// Hitachi H8/300H
+pub const EM_H8_300H: u16 = 47;
+/// Hitachi H8S
+pub const EM_H8S: u16 = 48;
+/// Hitachi H8/500
+pub const EM_H8_500: u16 = 49;
+/// Intel Merced
+pub const EM_IA_64: u16 = 50;
+/// Stanford MIPS-X
+pub const EM_MIPS_X: u16 = 51;
+/// Motorola Coldfire
+pub const EM_COLDFIRE: u16 = 52;
+/// Motorola M68HC12
+pub const EM_68HC12: u16 = 53;
+/// Fujitsu MMA Multimedia Accelerator
+pub const EM_MMA: u16 = 54;
+/// Siemens PCP
+pub const EM_PCP: u16 = 55;
+/// Sony nCPU embeeded RISC
+pub const EM_NCPU: u16 = 56;
+/// Denso NDR1 microprocessor
+pub const EM_NDR1: u16 = 57;
+/// Motorola Start*Core processor
+pub const EM_STARCORE: u16 = 58;
+/// Toyota ME16 processor
+pub const EM_ME16: u16 = 59;
+/// STMicroelectronic ST100 processor
+pub const EM_ST100: u16 = 60;
+/// Advanced Logic Corp. Tinyj emb.fam
+pub const EM_TINYJ: u16 = 61;
+/// AMD x86-64 architecture
+pub const EM_X86_64: u16 = 62;
+/// Sony DSP Processor
+pub const EM_PDSP: u16 = 63;
+/// Digital PDP-10
+pub const EM_PDP10: u16 = 64;
+/// Digital PDP-11
+pub const EM_PDP11: u16 = 65;
+/// Siemens FX66 microcontroller
+pub const EM_FX66: u16 = 66;
+/// STMicroelectronics ST9+ 8/16 mc
+pub const EM_ST9PLUS: u16 = 67;
+/// STmicroelectronics ST7 8 bit mc
+pub const EM_ST7: u16 = 68;
+/// Motorola MC68HC16 microcontroller
+pub const EM_68HC16: u16 = 69;
+/// Motorola MC68HC11 microcontroller
+pub const EM_68HC11: u16 = 70;
+/// Motorola MC68HC08 microcontroller
+pub const EM_68HC08: u16 = 71;
+/// Motorola MC68HC05 microcontroller
+pub const EM_68HC05: u16 = 72;
+/// Silicon Graphics SVx
+pub const EM_SVX: u16 = 73;
+/// STMicroelectronics ST19 8 bit mc
+pub const EM_ST19: u16 = 74;
+/// Digital VAX
+pub const EM_VAX: u16 = 75;
+/// Axis Communications 32-bit emb.proc
+pub const EM_CRIS: u16 = 76;
+/// Infineon Technologies 32-bit emb.proc
+pub const EM_JAVELIN: u16 = 77;
+/// Element 14 64-bit DSP Processor
+pub const EM_FIREPATH: u16 = 78;
+/// LSI Logic 16-bit DSP Processor
+pub const EM_ZSP: u16 = 79;
+/// Donald Knuth's educational 64-bit proc
+pub const EM_MMIX: u16 = 80;
+/// Harvard University machine-independent object files
+pub const EM_HUANY: u16 = 81;
+/// SiTera Prism
+pub const EM_PRISM: u16 = 82;
+/// Atmel AVR 8-bit microcontroller
+pub const EM_AVR: u16 = 83;
+/// Fujitsu FR30
+pub const EM_FR30: u16 = 84;
+/// Mitsubishi D10V
+pub const EM_D10V: u16 = 85;
+/// Mitsubishi D30V
+pub const EM_D30V: u16 = 86;
+/// NEC v850
+pub const EM_V850: u16 = 87;
+/// Mitsubishi M32R
+pub const EM_M32R: u16 = 88;
+/// Matsushita MN10300
+pub const EM_MN10300: u16 = 89;
+/// Matsushita MN10200
+pub const EM_MN10200: u16 = 90;
+/// picoJava
+pub const EM_PJ: u16 = 91;
+/// OpenRISC 32-bit embedded processor
+pub const EM_OPENRISC: u16 = 92;
+/// ARC International ARCompact
+pub const EM_ARC_COMPACT: u16 = 93;
+/// Tensilica Xtensa Architecture
+pub const EM_XTENSA: u16 = 94;
+/// Alphamosaic VideoCore
+pub const EM_VIDEOCORE: u16 = 95;
+/// Thompson Multimedia General Purpose Proc
+pub const EM_TMM_GPP: u16 = 96;
+/// National Semi. 32000
+pub const EM_NS32K: u16 = 97;
+/// Tenor Network TPC
+pub const EM_TPC: u16 = 98;
+/// Trebia SNP 1000
+pub const EM_SNP1K: u16 = 99;
+/// STMicroelectronics ST200
+pub const EM_ST200: u16 = 100;
+/// Ubicom IP2xxx
+pub const EM_IP2K: u16 = 101;
+/// MAX processor
+pub const EM_MAX: u16 = 102;
+/// National Semi. CompactRISC
+pub const EM_CR: u16 = 103;
+/// Fujitsu F2MC16
+pub const EM_F2MC16: u16 = 104;
+/// Texas Instruments msp430
+pub const EM_MSP430: u16 = 105;
+/// Analog Devices Blackfin DSP
+pub const EM_BLACKFIN: u16 = 106;
+/// Seiko Epson S1C33 family
+pub const EM_SE_C33: u16 = 107;
+/// Sharp embedded microprocessor
+pub const EM_SEP: u16 = 108;
+/// Arca RISC
+pub const EM_ARCA: u16 = 109;
+/// PKU-Unity & MPRC Peking Uni. mc series
+pub const EM_UNICORE: u16 = 110;
+/// eXcess configurable cpu
+pub const EM_EXCESS: u16 = 111;
+/// Icera Semi. Deep Execution Processor
+pub const EM_DXP: u16 = 112;
+/// Altera Nios II
+pub const EM_ALTERA_NIOS2: u16 = 113;
+/// National Semi. CompactRISC CRX
+pub const EM_CRX: u16 = 114;
+/// Motorola XGATE
+pub const EM_XGATE: u16 = 115;
+/// Infineon C16x/XC16x
+pub const EM_C166: u16 = 116;
+/// Renesas M16C
+pub const EM_M16C: u16 = 117;
+/// Microchip Technology dsPIC30F
+pub const EM_DSPIC30F: u16 = 118;
+/// Freescale Communication Engine RISC
+pub const EM_CE: u16 = 119;
+/// Renesas M32C
+pub const EM_M32C: u16 = 120;
+/// Altium TSK3000
+pub const EM_TSK3000: u16 = 131;
+/// Freescale RS08
+pub const EM_RS08: u16 = 132;
+/// Analog Devices SHARC family
+pub const EM_SHARC: u16 = 133;
+/// Cyan Technology eCOG2
+pub const EM_ECOG2: u16 = 134;
+/// Sunplus S+core7 RISC
+pub const EM_SCORE7: u16 = 135;
+/// New Japan Radio (NJR) 24-bit DSP
+pub const EM_DSP24: u16 = 136;
+/// Broadcom VideoCore III
+pub const EM_VIDEOCORE3: u16 = 137;
+/// RISC for Lattice FPGA
+pub const EM_LATTICEMICO32: u16 = 138;
+/// Seiko Epson C17
+pub const EM_SE_C17: u16 = 139;
+/// Texas Instruments TMS320C6000 DSP
+pub const EM_TI_C6000: u16 = 140;
+/// Texas Instruments TMS320C2000 DSP
+pub const EM_TI_C2000: u16 = 141;
+/// Texas Instruments TMS320C55x DSP
+pub const EM_TI_C5500: u16 = 142;
+/// Texas Instruments App. Specific RISC
+pub const EM_TI_ARP32: u16 = 143;
+/// Texas Instruments Prog. Realtime Unit
+pub const EM_TI_PRU: u16 = 144;
+/// STMicroelectronics 64bit VLIW DSP
+pub const EM_MMDSP_PLUS: u16 = 160;
+/// Cypress M8C
+pub const EM_CYPRESS_M8C: u16 = 161;
+/// Renesas R32C
+pub const EM_R32C: u16 = 162;
+/// NXP Semi. TriMedia
+pub const EM_TRIMEDIA: u16 = 163;
+/// QUALCOMM Hexagon
+pub const EM_HEXAGON: u16 = 164;
+/// Intel 8051 and variants
+pub const EM_8051: u16 = 165;
+/// STMicroelectronics STxP7x
+pub const EM_STXP7X: u16 = 166;
+/// Andes Tech. compact code emb. RISC
+pub const EM_NDS32: u16 = 167;
+/// Cyan Technology eCOG1X
+pub const EM_ECOG1X: u16 = 168;
+/// Dallas Semi. MAXQ30 mc
+pub const EM_MAXQ30: u16 = 169;
+/// New Japan Radio (NJR) 16-bit DSP
+pub const EM_XIMO16: u16 = 170;
+/// M2000 Reconfigurable RISC
+pub const EM_MANIK: u16 = 171;
+/// Cray NV2 vector architecture
+pub const EM_CRAYNV2: u16 = 172;
+/// Renesas RX
+pub const EM_RX: u16 = 173;
+/// Imagination Tech. META
+pub const EM_METAG: u16 = 174;
+/// MCST Elbrus
+pub const EM_MCST_ELBRUS: u16 = 175;
+/// Cyan Technology eCOG16
+pub const EM_ECOG16: u16 = 176;
+/// National Semi. CompactRISC CR16
+pub const EM_CR16: u16 = 177;
+/// Freescale Extended Time Processing Unit
+pub const EM_ETPU: u16 = 178;
+/// Infineon Tech. SLE9X
+pub const EM_SLE9X: u16 = 179;
+/// Intel L10M
+pub const EM_L10M: u16 = 180;
+/// Intel K10M
+pub const EM_K10M: u16 = 181;
+/// ARM AARCH64
+pub const EM_AARCH64: u16 = 183;
+/// Amtel 32-bit microprocessor
+pub const EM_AVR32: u16 = 185;
+/// STMicroelectronics STM8
+pub const EM_STM8: u16 = 186;
+/// Tileta TILE64
+pub const EM_TILE64: u16 = 187;
+/// Tilera TILEPro
+pub const EM_TILEPRO: u16 = 188;
+/// Xilinx MicroBlaze
+pub const EM_MICROBLAZE: u16 = 189;
+/// NVIDIA CUDA
+pub const EM_CUDA: u16 = 190;
+/// Tilera TILE-Gx
+pub const EM_TILEGX: u16 = 191;
+/// CloudShield
+pub const EM_CLOUDSHIELD: u16 = 192;
+/// KIPO-KAIST Core-A 1st gen.
+pub const EM_COREA_1ST: u16 = 193;
+/// KIPO-KAIST Core-A 2nd gen.
+pub const EM_COREA_2ND: u16 = 194;
+/// Synopsys ARCompact V2
+pub const EM_ARC_COMPACT2: u16 = 195;
+/// Open8 RISC
+pub const EM_OPEN8: u16 = 196;
+/// Renesas RL78
+pub const EM_RL78: u16 = 197;
+/// Broadcom VideoCore V
+pub const EM_VIDEOCORE5: u16 = 198;
+/// Renesas 78KOR
+pub const EM_78KOR: u16 = 199;
+/// Freescale 56800EX DSC
+pub const EM_56800EX: u16 = 200;
+/// Beyond BA1
+pub const EM_BA1: u16 = 201;
+/// Beyond BA2
+pub const EM_BA2: u16 = 202;
+/// XMOS xCORE
+pub const EM_XCORE: u16 = 203;
+/// Microchip 8-bit PIC(r)
+pub const EM_MCHP_PIC: u16 = 204;
+/// KM211 KM32
+pub const EM_KM32: u16 = 210;
+/// KM211 KMX32
+pub const EM_KMX32: u16 = 211;
+/// KM211 KMX16
+pub const EM_EMX16: u16 = 212;
+/// KM211 KMX8
+pub const EM_EMX8: u16 = 213;
+/// KM211 KVARC
+pub const EM_KVARC: u16 = 214;
+/// Paneve CDP
+pub const EM_CDP: u16 = 215;
+/// Cognitive Smart Memory Processor
+pub const EM_COGE: u16 = 216;
+/// Bluechip CoolEngine
+pub const EM_COOL: u16 = 217;
+/// Nanoradio Optimized RISC
+pub const EM_NORC: u16 = 218;
+/// CSR Kalimba
+pub const EM_CSR_KALIMBA: u16 = 219;
+/// Zilog Z80
+pub const EM_Z80: u16 = 220;
+/// Controls and Data Services VISIUMcore
+pub const EM_VISIUM: u16 = 221;
+/// FTDI Chip FT32
+pub const EM_FT32: u16 = 222;
+/// Moxie processor
+pub const EM_MOXIE: u16 = 223;
+/// AMD GPU
+pub const EM_AMDGPU: u16 = 224;
+/// RISC-V
+pub const EM_RISCV: u16 = 243;
+/// Linux BPF -- in-kernel virtual machine
+pub const EM_BPF: u16 = 247;
+/// C-SKY
+pub const EM_CSKY: u16 = 252;
+/// Loongson LoongArch
+pub const EM_LOONGARCH: u16 = 258;
+/// Solana Binary Format
+pub const EM_SBF: u16 = 263;
+/// Digital Alpha
+pub const EM_ALPHA: u16 = 0x9026;
+
+// Values for `FileHeader*::e_version` and `Ident::version`.
+/// Invalid ELF version.
+pub const EV_NONE: u8 = 0;
+/// Current ELF version.
+pub const EV_CURRENT: u8 = 1;
+
+/// Section header.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct SectionHeader32<E: Endian> {
+    /// Section name.
+    ///
+    /// This is an offset into the section header string table.
+    pub sh_name: U32<E>,
+    /// Section type. One of the `SHT_*` constants.
+    pub sh_type: U32<E>,
+    /// Section flags. A combination of the `SHF_*` constants.
+    pub sh_flags: U32<E>,
+    /// Section virtual address at execution.
+    pub sh_addr: U32<E>,
+    /// Section file offset.
+    pub sh_offset: U32<E>,
+    /// Section size in bytes.
+    pub sh_size: U32<E>,
+    /// Link to another section.
+    ///
+    /// The section relationship depends on the `sh_type` value.
+    pub sh_link: U32<E>,
+    /// Additional section information.
+    ///
+    /// The meaning of this field depends on the `sh_type` value.
+    pub sh_info: U32<E>,
+    /// Section alignment.
+    pub sh_addralign: U32<E>,
+    /// Entry size if the section holds a table.
+    pub sh_entsize: U32<E>,
+}
+
+/// Section header.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct SectionHeader64<E: Endian> {
+    /// Section name.
+    ///
+    /// This is an offset into the section header string table.
+    pub sh_name: U32<E>,
+    /// Section type. One of the `SHT_*` constants.
+    pub sh_type: U32<E>,
+    /// Section flags. A combination of the `SHF_*` constants.
+    pub sh_flags: U64<E>,
+    /// Section virtual address at execution.
+    pub sh_addr: U64<E>,
+    /// Section file offset.
+    pub sh_offset: U64<E>,
+    /// Section size in bytes.
+    pub sh_size: U64<E>,
+    /// Link to another section.
+    ///
+    /// The section relationship depends on the `sh_type` value.
+    pub sh_link: U32<E>,
+    /// Additional section information.
+    ///
+    /// The meaning of this field depends on the `sh_type` value.
+    pub sh_info: U32<E>,
+    /// Section alignment.
+    pub sh_addralign: U64<E>,
+    /// Entry size if the section holds a table.
+    pub sh_entsize: U64<E>,
+}
+
+// Special values for section indices.
+/// Undefined section.
+pub const SHN_UNDEF: u16 = 0;
+/// OS-specific range start.
+/// Start of reserved section indices.
+pub const SHN_LORESERVE: u16 = 0xff00;
+/// Start of processor-specific section indices.
+pub const SHN_LOPROC: u16 = 0xff00;
+/// End of processor-specific section indices.
+pub const SHN_HIPROC: u16 = 0xff1f;
+/// Start of OS-specific section indices.
+pub const SHN_LOOS: u16 = 0xff20;
+/// End of OS-specific section indices.
+pub const SHN_HIOS: u16 = 0xff3f;
+/// Associated symbol is absolute.
+pub const SHN_ABS: u16 = 0xfff1;
+/// Associated symbol is common.
+pub const SHN_COMMON: u16 = 0xfff2;
+/// Section index is in the `SHT_SYMTAB_SHNDX` section.
+pub const SHN_XINDEX: u16 = 0xffff;
+/// End of reserved section indices.
+pub const SHN_HIRESERVE: u16 = 0xffff;
+
+// Values for `SectionHeader*::sh_type`.
+/// Section header table entry is unused.
+pub const SHT_NULL: u32 = 0;
+/// Program data.
+pub const SHT_PROGBITS: u32 = 1;
+/// Symbol table.
+pub const SHT_SYMTAB: u32 = 2;
+/// String table.
+pub const SHT_STRTAB: u32 = 3;
+/// Relocation entries with explicit addends.
+pub const SHT_RELA: u32 = 4;
+/// Symbol hash table.
+pub const SHT_HASH: u32 = 5;
+/// Dynamic linking information.
+pub const SHT_DYNAMIC: u32 = 6;
+/// Notes.
+pub const SHT_NOTE: u32 = 7;
+/// Program space with no data (bss).
+pub const SHT_NOBITS: u32 = 8;
+/// Relocation entries without explicit addends.
+pub const SHT_REL: u32 = 9;
+/// Reserved section type.
+pub const SHT_SHLIB: u32 = 10;
+/// Dynamic linker symbol table.
+pub const SHT_DYNSYM: u32 = 11;
+/// Array of constructors.
+pub const SHT_INIT_ARRAY: u32 = 14;
+/// Array of destructors.
+pub const SHT_FINI_ARRAY: u32 = 15;
+/// Array of pre-constructors.
+pub const SHT_PREINIT_ARRAY: u32 = 16;
+/// Section group.
+pub const SHT_GROUP: u32 = 17;
+/// Extended section indices for a symbol table.
+pub const SHT_SYMTAB_SHNDX: u32 = 18;
+/// Start of OS-specific section types.
+pub const SHT_LOOS: u32 = 0x6000_0000;
+/// Object attributes.
+pub const SHT_GNU_ATTRIBUTES: u32 = 0x6fff_fff5;
+/// GNU-style hash table.
+pub const SHT_GNU_HASH: u32 = 0x6fff_fff6;
+/// Prelink library list
+pub const SHT_GNU_LIBLIST: u32 = 0x6fff_fff7;
+/// Checksum for DSO content.
+pub const SHT_CHECKSUM: u32 = 0x6fff_fff8;
+/// Sun-specific low bound.
+pub const SHT_LOSUNW: u32 = 0x6fff_fffa;
+#[allow(missing_docs, non_upper_case_globals)]
+pub const SHT_SUNW_move: u32 = 0x6fff_fffa;
+#[allow(missing_docs)]
+pub const SHT_SUNW_COMDAT: u32 = 0x6fff_fffb;
+#[allow(missing_docs, non_upper_case_globals)]
+pub const SHT_SUNW_syminfo: u32 = 0x6fff_fffc;
+/// Version definition section.
+#[allow(non_upper_case_globals)]
+pub const SHT_GNU_VERDEF: u32 = 0x6fff_fffd;
+/// Version needs section.
+#[allow(non_upper_case_globals)]
+pub const SHT_GNU_VERNEED: u32 = 0x6fff_fffe;
+/// Version symbol table.
+#[allow(non_upper_case_globals)]
+pub const SHT_GNU_VERSYM: u32 = 0x6fff_ffff;
+/// Sun-specific high bound.
+pub const SHT_HISUNW: u32 = 0x6fff_ffff;
+/// End of OS-specific section types.
+pub const SHT_HIOS: u32 = 0x6fff_ffff;
+/// Start of processor-specific section types.
+pub const SHT_LOPROC: u32 = 0x7000_0000;
+/// End of processor-specific section types.
+pub const SHT_HIPROC: u32 = 0x7fff_ffff;
+/// Start of application-specific section types.
+pub const SHT_LOUSER: u32 = 0x8000_0000;
+/// End of application-specific section types.
+pub const SHT_HIUSER: u32 = 0x8fff_ffff;
+
+// Values for `SectionHeader*::sh_flags`.
+/// Section is writable.
+pub const SHF_WRITE: u32 = 1 << 0;
+/// Section occupies memory during execution.
+pub const SHF_ALLOC: u32 = 1 << 1;
+/// Section is executable.
+pub const SHF_EXECINSTR: u32 = 1 << 2;
+/// Section may be be merged to eliminate duplication.
+pub const SHF_MERGE: u32 = 1 << 4;
+/// Section contains nul-terminated strings.
+pub const SHF_STRINGS: u32 = 1 << 5;
+/// The `sh_info` field contains a section header table index.
+pub const SHF_INFO_LINK: u32 = 1 << 6;
+/// Section has special ordering requirements when combining sections.
+pub const SHF_LINK_ORDER: u32 = 1 << 7;
+/// Section requires special OS-specific handling.
+pub const SHF_OS_NONCONFORMING: u32 = 1 << 8;
+/// Section is a member of a group.
+pub const SHF_GROUP: u32 = 1 << 9;
+/// Section holds thread-local storage.
+pub const SHF_TLS: u32 = 1 << 10;
+/// Section is compressed.
+///
+/// Compressed sections begin with one of the `CompressionHeader*` headers.
+pub const SHF_COMPRESSED: u32 = 1 << 11;
+/// OS-specific section flags.
+pub const SHF_MASKOS: u32 = 0x0ff0_0000;
+/// Processor-specific section flags.
+pub const SHF_MASKPROC: u32 = 0xf000_0000;
+/// This section is excluded from the final executable or shared library.
+pub const SHF_EXCLUDE: u32 = 0x8000_0000;
+
+/// Section compression header.
+///
+/// Used when `SHF_COMPRESSED` is set.
+///
+/// Note: this type currently allows for misaligned headers, but that may be
+/// changed in a future version.
+#[derive(Debug, Default, Clone, Copy)]
+#[repr(C)]
+pub struct CompressionHeader32<E: Endian> {
+    /// Compression format. One of the `ELFCOMPRESS_*` values.
+    pub ch_type: U32Bytes<E>,
+    /// Uncompressed data size.
+    pub ch_size: U32Bytes<E>,
+    /// Uncompressed data alignment.
+    pub ch_addralign: U32Bytes<E>,
+}
+
+/// Section compression header.
+///
+/// Used when `SHF_COMPRESSED` is set.
+///
+/// Note: this type currently allows for misaligned headers, but that may be
+/// changed in a future version.
+#[derive(Debug, Default, Clone, Copy)]
+#[repr(C)]
+pub struct CompressionHeader64<E: Endian> {
+    /// Compression format. One of the `ELFCOMPRESS_*` values.
+    pub ch_type: U32Bytes<E>,
+    /// Reserved.
+    pub ch_reserved: U32Bytes<E>,
+    /// Uncompressed data size.
+    pub ch_size: U64Bytes<E>,
+    /// Uncompressed data alignment.
+    pub ch_addralign: U64Bytes<E>,
+}
+
+/// ZLIB/DEFLATE algorithm.
+pub const ELFCOMPRESS_ZLIB: u32 = 1;
+/// Start of OS-specific compression types.
+pub const ELFCOMPRESS_LOOS: u32 = 0x6000_0000;
+/// End of OS-specific compression types.
+pub const ELFCOMPRESS_HIOS: u32 = 0x6fff_ffff;
+/// Start of processor-specific compression types.
+pub const ELFCOMPRESS_LOPROC: u32 = 0x7000_0000;
+/// End of processor-specific compression types.
+pub const ELFCOMPRESS_HIPROC: u32 = 0x7fff_ffff;
+
+// Values for the flag entry for section groups.
+/// Mark group as COMDAT.
+pub const GRP_COMDAT: u32 = 1;
+
+/// Symbol table entry.
+#[derive(Debug, Default, Clone, Copy)]
+#[repr(C)]
+pub struct Sym32<E: Endian> {
+    /// Symbol name.
+    ///
+    /// This is an offset into the symbol string table.
+    pub st_name: U32<E>,
+    /// Symbol value.
+    pub st_value: U32<E>,
+    /// Symbol size.
+    pub st_size: U32<E>,
+    /// Symbol type and binding.
+    ///
+    /// Use the `st_type` and `st_bind` methods to access this value.
+    pub st_info: u8,
+    /// Symbol visibility.
+    ///
+    /// Use the `st_visibility` method to access this value.
+    pub st_other: u8,
+    /// Section index or one of the `SHN_*` values.
+    pub st_shndx: U16<E>,
+}
+
+impl<E: Endian> Sym32<E> {
+    /// Get the `st_bind` component of the `st_info` field.
+    #[inline]
+    pub fn st_bind(&self) -> u8 {
+        self.st_info >> 4
+    }
+
+    /// Get the `st_type` component of the `st_info` field.
+    #[inline]
+    pub fn st_type(&self) -> u8 {
+        self.st_info & 0xf
+    }
+
+    /// Set the `st_info` field given the `st_bind` and `st_type` components.
+    #[inline]
+    pub fn set_st_info(&mut self, st_bind: u8, st_type: u8) {
+        self.st_info = (st_bind << 4) + (st_type & 0xf);
+    }
+
+    /// Get the `st_visibility` component of the `st_info` field.
+    #[inline]
+    pub fn st_visibility(&self) -> u8 {
+        self.st_other & 0x3
+    }
+}
+
+/// Symbol table entry.
+#[derive(Debug, Default, Clone, Copy)]
+#[repr(C)]
+pub struct Sym64<E: Endian> {
+    /// Symbol name.
+    ///
+    /// This is an offset into the symbol string table.
+    pub st_name: U32<E>,
+    /// Symbol type and binding.
+    ///
+    /// Use the `st_bind` and `st_type` methods to access this value.
+    pub st_info: u8,
+    /// Symbol visibility.
+    ///
+    /// Use the `st_visibility` method to access this value.
+    pub st_other: u8,
+    /// Section index or one of the `SHN_*` values.
+    pub st_shndx: U16<E>,
+    /// Symbol value.
+    pub st_value: U64<E>,
+    /// Symbol size.
+    pub st_size: U64<E>,
+}
+
+impl<E: Endian> Sym64<E> {
+    /// Get the `st_bind` component of the `st_info` field.
+    #[inline]
+    pub fn st_bind(&self) -> u8 {
+        self.st_info >> 4
+    }
+
+    /// Get the `st_type` component of the `st_info` field.
+    #[inline]
+    pub fn st_type(&self) -> u8 {
+        self.st_info & 0xf
+    }
+
+    /// Set the `st_info` field given the `st_bind` and `st_type` components.
+    #[inline]
+    pub fn set_st_info(&mut self, st_bind: u8, st_type: u8) {
+        self.st_info = (st_bind << 4) + (st_type & 0xf);
+    }
+
+    /// Get the `st_visibility` component of the `st_info` field.
+    #[inline]
+    pub fn st_visibility(&self) -> u8 {
+        self.st_other & 0x3
+    }
+}
+
+/// Additional information about a `Sym32`.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct Syminfo32<E: Endian> {
+    /// Direct bindings, symbol bound to.
+    pub si_boundto: U16<E>,
+    /// Per symbol flags.
+    pub si_flags: U16<E>,
+}
+
+/// Additional information about a `Sym64`.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct Syminfo64<E: Endian> {
+    /// Direct bindings, symbol bound to.
+    pub si_boundto: U16<E>,
+    /// Per symbol flags.
+    pub si_flags: U16<E>,
+}
+
+// Values for `Syminfo*::si_boundto`.
+/// Symbol bound to self
+pub const SYMINFO_BT_SELF: u16 = 0xffff;
+/// Symbol bound to parent
+pub const SYMINFO_BT_PARENT: u16 = 0xfffe;
+/// Beginning of reserved entries
+pub const SYMINFO_BT_LOWRESERVE: u16 = 0xff00;
+
+// Values for `Syminfo*::si_flags`.
+/// Direct bound symbol
+pub const SYMINFO_FLG_DIRECT: u16 = 0x0001;
+/// Pass-thru symbol for translator
+pub const SYMINFO_FLG_PASSTHRU: u16 = 0x0002;
+/// Symbol is a copy-reloc
+pub const SYMINFO_FLG_COPY: u16 = 0x0004;
+/// Symbol bound to object to be lazy loaded
+pub const SYMINFO_FLG_LAZYLOAD: u16 = 0x0008;
+
+// Syminfo version values.
+#[allow(missing_docs)]
+pub const SYMINFO_NONE: u16 = 0;
+#[allow(missing_docs)]
+pub const SYMINFO_CURRENT: u16 = 1;
+#[allow(missing_docs)]
+pub const SYMINFO_NUM: u16 = 2;
+
+// Values for bind component of `Sym*::st_info`.
+/// Local symbol.
+pub const STB_LOCAL: u8 = 0;
+/// Global symbol.
+pub const STB_GLOBAL: u8 = 1;
+/// Weak symbol.
+pub const STB_WEAK: u8 = 2;
+/// Start of OS-specific symbol binding.
+pub const STB_LOOS: u8 = 10;
+/// Unique symbol.
+pub const STB_GNU_UNIQUE: u8 = 10;
+/// End of OS-specific symbol binding.
+pub const STB_HIOS: u8 = 12;
+/// Start of processor-specific symbol binding.
+pub const STB_LOPROC: u8 = 13;
+/// End of processor-specific symbol binding.
+pub const STB_HIPROC: u8 = 15;
+
+// Values for type component of `Sym*::st_info`.
+/// Symbol type is unspecified.
+pub const STT_NOTYPE: u8 = 0;
+/// Symbol is a data object.
+pub const STT_OBJECT: u8 = 1;
+/// Symbol is a code object.
+pub const STT_FUNC: u8 = 2;
+/// Symbol is associated with a section.
+pub const STT_SECTION: u8 = 3;
+/// Symbol's name is a file name.
+pub const STT_FILE: u8 = 4;
+/// Symbol is a common data object.
+pub const STT_COMMON: u8 = 5;
+/// Symbol is a thread-local storage object.
+pub const STT_TLS: u8 = 6;
+/// Start of OS-specific symbol types.
+pub const STT_LOOS: u8 = 10;
+/// Symbol is an indirect code object.
+pub const STT_GNU_IFUNC: u8 = 10;
+/// End of OS-specific symbol types.
+pub const STT_HIOS: u8 = 12;
+/// Start of processor-specific symbol types.
+pub const STT_LOPROC: u8 = 13;
+/// End of processor-specific symbol types.
+pub const STT_HIPROC: u8 = 15;
+
+// Values for visibility component of `Symbol*::st_other`.
+/// Default symbol visibility rules.
+pub const STV_DEFAULT: u8 = 0;
+/// Processor specific hidden class.
+pub const STV_INTERNAL: u8 = 1;
+/// Symbol is not visible to other components.
+pub const STV_HIDDEN: u8 = 2;
+/// Symbol is visible to other components, but is not preemptible.
+pub const STV_PROTECTED: u8 = 3;
+
+/// Relocation table entry without explicit addend.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct Rel32<E: Endian> {
+    /// Relocation address.
+    pub r_offset: U32<E>,
+    /// Relocation type and symbol index.
+    pub r_info: U32<E>,
+}
+
+impl<E: Endian> Rel32<E> {
+    /// Get the `r_sym` component of the `r_info` field.
+    #[inline]
+    pub fn r_sym(&self, endian: E) -> u32 {
+        self.r_info.get(endian) >> 8
+    }
+
+    /// Get the `r_type` component of the `r_info` field.
+    #[inline]
+    pub fn r_type(&self, endian: E) -> u32 {
+        self.r_info.get(endian) & 0xff
+    }
+
+    /// Calculate the `r_info` field given the `r_sym` and `r_type` components.
+    pub fn r_info(endian: E, r_sym: u32, r_type: u8) -> U32<E> {
+        U32::new(endian, (r_sym << 8) | u32::from(r_type))
+    }
+
+    /// Set the `r_info` field given the `r_sym` and `r_type` components.
+    pub fn set_r_info(&mut self, endian: E, r_sym: u32, r_type: u8) {
+        self.r_info = Self::r_info(endian, r_sym, r_type)
+    }
+}
+
+/// Relocation table entry with explicit addend.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct Rela32<E: Endian> {
+    /// Relocation address.
+    pub r_offset: U32<E>,
+    /// Relocation type and symbol index.
+    pub r_info: U32<E>,
+    /// Explicit addend.
+    pub r_addend: I32<E>,
+}
+
+impl<E: Endian> Rela32<E> {
+    /// Get the `r_sym` component of the `r_info` field.
+    #[inline]
+    pub fn r_sym(&self, endian: E) -> u32 {
+        self.r_info.get(endian) >> 8
+    }
+
+    /// Get the `r_type` component of the `r_info` field.
+    #[inline]
+    pub fn r_type(&self, endian: E) -> u32 {
+        self.r_info.get(endian) & 0xff
+    }
+
+    /// Calculate the `r_info` field given the `r_sym` and `r_type` components.
+    pub fn r_info(endian: E, r_sym: u32, r_type: u8) -> U32<E> {
+        U32::new(endian, (r_sym << 8) | u32::from(r_type))
+    }
+
+    /// Set the `r_info` field given the `r_sym` and `r_type` components.
+    pub fn set_r_info(&mut self, endian: E, r_sym: u32, r_type: u8) {
+        self.r_info = Self::r_info(endian, r_sym, r_type)
+    }
+}
+
+impl<E: Endian> From<Rel32<E>> for Rela32<E> {
+    fn from(rel: Rel32<E>) -> Self {
+        Rela32 {
+            r_offset: rel.r_offset,
+            r_info: rel.r_info,
+            r_addend: I32::default(),
+        }
+    }
+}
+
+/// Relocation table entry without explicit addend.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct Rel64<E: Endian> {
+    /// Relocation address.
+    pub r_offset: U64<E>,
+    /// Relocation type and symbol index.
+    pub r_info: U64<E>,
+}
+
+impl<E: Endian> Rel64<E> {
+    /// Get the `r_sym` component of the `r_info` field.
+    #[inline]
+    pub fn r_sym(&self, endian: E) -> u32 {
+        (self.r_info.get(endian) >> 32) as u32
+    }
+
+    /// Get the `r_type` component of the `r_info` field.
+    #[inline]
+    pub fn r_type(&self, endian: E) -> u32 {
+        (self.r_info.get(endian) & 0xffff_ffff) as u32
+    }
+
+    /// Calculate the `r_info` field given the `r_sym` and `r_type` components.
+    pub fn r_info(endian: E, r_sym: u32, r_type: u32) -> U64<E> {
+        U64::new(endian, (u64::from(r_sym) << 32) | u64::from(r_type))
+    }
+
+    /// Set the `r_info` field given the `r_sym` and `r_type` components.
+    pub fn set_r_info(&mut self, endian: E, r_sym: u32, r_type: u32) {
+        self.r_info = Self::r_info(endian, r_sym, r_type)
+    }
+}
+
+impl<E: Endian> From<Rel64<E>> for Rela64<E> {
+    fn from(rel: Rel64<E>) -> Self {
+        Rela64 {
+            r_offset: rel.r_offset,
+            r_info: rel.r_info,
+            r_addend: I64::default(),
+        }
+    }
+}
+
+/// Relocation table entry with explicit addend.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct Rela64<E: Endian> {
+    /// Relocation address.
+    pub r_offset: U64<E>,
+    /// Relocation type and symbol index.
+    pub r_info: U64<E>,
+    /// Explicit addend.
+    pub r_addend: I64<E>,
+}
+
+impl<E: Endian> Rela64<E> {
+    pub(crate) fn get_r_info(&self, endian: E, is_mips64el: bool) -> u64 {
+        let mut t = self.r_info.get(endian);
+        if is_mips64el {
+            t = (t << 32)
+                | ((t >> 8) & 0xff000000)
+                | ((t >> 24) & 0x00ff0000)
+                | ((t >> 40) & 0x0000ff00)
+                | ((t >> 56) & 0x000000ff);
+        }
+        t
+    }
+
+    /// Get the `r_sym` component of the `r_info` field.
+    #[inline]
+    pub fn r_sym(&self, endian: E, is_mips64el: bool) -> u32 {
+        (self.get_r_info(endian, is_mips64el) >> 32) as u32
+    }
+
+    /// Get the `r_type` component of the `r_info` field.
+    #[inline]
+    pub fn r_type(&self, endian: E, is_mips64el: bool) -> u32 {
+        (self.get_r_info(endian, is_mips64el) & 0xffff_ffff) as u32
+    }
+
+    /// Calculate the `r_info` field given the `r_sym` and `r_type` components.
+    pub fn r_info(endian: E, is_mips64el: bool, r_sym: u32, r_type: u32) -> U64<E> {
+        let mut t = (u64::from(r_sym) << 32) | u64::from(r_type);
+        if is_mips64el {
+            t = (t >> 32)
+                | ((t & 0xff000000) << 8)
+                | ((t & 0x00ff0000) << 24)
+                | ((t & 0x0000ff00) << 40)
+                | ((t & 0x000000ff) << 56);
+        }
+        U64::new(endian, t)
+    }
+
+    /// Set the `r_info` field given the `r_sym` and `r_type` components.
+    pub fn set_r_info(&mut self, endian: E, is_mips64el: bool, r_sym: u32, r_type: u32) {
+        self.r_info = Self::r_info(endian, is_mips64el, r_sym, r_type);
+    }
+}
+
+/// Program segment header.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ProgramHeader32<E: Endian> {
+    /// Segment type. One of the `PT_*` constants.
+    pub p_type: U32<E>,
+    /// Segment file offset.
+    pub p_offset: U32<E>,
+    /// Segment virtual address.
+    pub p_vaddr: U32<E>,
+    /// Segment physical address.
+    pub p_paddr: U32<E>,
+    /// Segment size in the file.
+    pub p_filesz: U32<E>,
+    /// Segment size in memory.
+    pub p_memsz: U32<E>,
+    /// Segment flags. A combination of the `PF_*` constants.
+    pub p_flags: U32<E>,
+    /// Segment alignment.
+    pub p_align: U32<E>,
+}
+
+/// Program segment header.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ProgramHeader64<E: Endian> {
+    /// Segment type. One of the `PT_*` constants.
+    pub p_type: U32<E>,
+    /// Segment flags. A combination of the `PF_*` constants.
+    pub p_flags: U32<E>,
+    /// Segment file offset.
+    pub p_offset: U64<E>,
+    /// Segment virtual address.
+    pub p_vaddr: U64<E>,
+    /// Segment physical address.
+    pub p_paddr: U64<E>,
+    /// Segment size in the file.
+    pub p_filesz: U64<E>,
+    /// Segment size in memory.
+    pub p_memsz: U64<E>,
+    /// Segment alignment.
+    pub p_align: U64<E>,
+}
+
+/// Special value for `FileHeader*::e_phnum`.
+///
+/// This indicates that the real number of program headers is too large to fit into e_phnum.
+/// Instead the real value is in the field `sh_info` of section 0.
+pub const PN_XNUM: u16 = 0xffff;
+
+// Values for `ProgramHeader*::p_type`.
+/// Program header table entry is unused.
+pub const PT_NULL: u32 = 0;
+/// Loadable program segment.
+pub const PT_LOAD: u32 = 1;
+/// Dynamic linking information.
+pub const PT_DYNAMIC: u32 = 2;
+/// Program interpreter.
+pub const PT_INTERP: u32 = 3;
+/// Auxiliary information.
+pub const PT_NOTE: u32 = 4;
+/// Reserved.
+pub const PT_SHLIB: u32 = 5;
+/// Segment contains the program header table.
+pub const PT_PHDR: u32 = 6;
+/// Thread-local storage segment.
+pub const PT_TLS: u32 = 7;
+/// Start of OS-specific segment types.
+pub const PT_LOOS: u32 = 0x6000_0000;
+/// GCC `.eh_frame_hdr` segment.
+pub const PT_GNU_EH_FRAME: u32 = 0x6474_e550;
+/// Indicates stack executability.
+pub const PT_GNU_STACK: u32 = 0x6474_e551;
+/// Read-only after relocation.
+pub const PT_GNU_RELRO: u32 = 0x6474_e552;
+/// End of OS-specific segment types.
+pub const PT_HIOS: u32 = 0x6fff_ffff;
+/// Start of processor-specific segment types.
+pub const PT_LOPROC: u32 = 0x7000_0000;
+/// End of processor-specific segment types.
+pub const PT_HIPROC: u32 = 0x7fff_ffff;
+
+// Values for `ProgramHeader*::p_flags`.
+/// Segment is executable.
+pub const PF_X: u32 = 1 << 0;
+/// Segment is writable.
+pub const PF_W: u32 = 1 << 1;
+/// Segment is readable.
+pub const PF_R: u32 = 1 << 2;
+/// OS-specific segment flags.
+pub const PF_MASKOS: u32 = 0x0ff0_0000;
+/// Processor-specific segment flags.
+pub const PF_MASKPROC: u32 = 0xf000_0000;
+
+/// Note name for core files.
+pub static ELF_NOTE_CORE: &[u8] = b"CORE";
+/// Note name for linux core files.
+///
+/// Notes in linux core files may also use `ELF_NOTE_CORE`.
+pub static ELF_NOTE_LINUX: &[u8] = b"LINUX";
+
+// Values for `NoteHeader*::n_type` in core files.
+//
+/// Contains copy of prstatus struct.
+pub const NT_PRSTATUS: u32 = 1;
+/// Contains copy of fpregset struct.
+pub const NT_PRFPREG: u32 = 2;
+/// Contains copy of fpregset struct.
+pub const NT_FPREGSET: u32 = 2;
+/// Contains copy of prpsinfo struct.
+pub const NT_PRPSINFO: u32 = 3;
+/// Contains copy of prxregset struct.
+pub const NT_PRXREG: u32 = 4;
+/// Contains copy of task structure.
+pub const NT_TASKSTRUCT: u32 = 4;
+/// String from sysinfo(SI_PLATFORM).
+pub const NT_PLATFORM: u32 = 5;
+/// Contains copy of auxv array.
+pub const NT_AUXV: u32 = 6;
+/// Contains copy of gwindows struct.
+pub const NT_GWINDOWS: u32 = 7;
+/// Contains copy of asrset struct.
+pub const NT_ASRS: u32 = 8;
+/// Contains copy of pstatus struct.
+pub const NT_PSTATUS: u32 = 10;
+/// Contains copy of psinfo struct.
+pub const NT_PSINFO: u32 = 13;
+/// Contains copy of prcred struct.
+pub const NT_PRCRED: u32 = 14;
+/// Contains copy of utsname struct.
+pub const NT_UTSNAME: u32 = 15;
+/// Contains copy of lwpstatus struct.
+pub const NT_LWPSTATUS: u32 = 16;
+/// Contains copy of lwpinfo struct.
+pub const NT_LWPSINFO: u32 = 17;
+/// Contains copy of fprxregset struct.
+pub const NT_PRFPXREG: u32 = 20;
+/// Contains copy of siginfo_t, size might increase.
+pub const NT_SIGINFO: u32 = 0x5349_4749;
+/// Contains information about mapped files.
+pub const NT_FILE: u32 = 0x4649_4c45;
+/// Contains copy of user_fxsr_struct.
+pub const NT_PRXFPREG: u32 = 0x46e6_2b7f;
+/// PowerPC Altivec/VMX registers.
+pub const NT_PPC_VMX: u32 = 0x100;
+/// PowerPC SPE/EVR registers.
+pub const NT_PPC_SPE: u32 = 0x101;
+/// PowerPC VSX registers.
+pub const NT_PPC_VSX: u32 = 0x102;
+/// Target Address Register.
+pub const NT_PPC_TAR: u32 = 0x103;
+/// Program Priority Register.
+pub const NT_PPC_PPR: u32 = 0x104;
+/// Data Stream Control Register.
+pub const NT_PPC_DSCR: u32 = 0x105;
+/// Event Based Branch Registers.
+pub const NT_PPC_EBB: u32 = 0x106;
+/// Performance Monitor Registers.
+pub const NT_PPC_PMU: u32 = 0x107;
+/// TM checkpointed GPR Registers.
+pub const NT_PPC_TM_CGPR: u32 = 0x108;
+/// TM checkpointed FPR Registers.
+pub const NT_PPC_TM_CFPR: u32 = 0x109;
+/// TM checkpointed VMX Registers.
+pub const NT_PPC_TM_CVMX: u32 = 0x10a;
+/// TM checkpointed VSX Registers.
+pub const NT_PPC_TM_CVSX: u32 = 0x10b;
+/// TM Special Purpose Registers.
+pub const NT_PPC_TM_SPR: u32 = 0x10c;
+/// TM checkpointed Target Address Register.
+pub const NT_PPC_TM_CTAR: u32 = 0x10d;
+/// TM checkpointed Program Priority Register.
+pub const NT_PPC_TM_CPPR: u32 = 0x10e;
+/// TM checkpointed Data Stream Control Register.
+pub const NT_PPC_TM_CDSCR: u32 = 0x10f;
+/// Memory Protection Keys registers.
+pub const NT_PPC_PKEY: u32 = 0x110;
+/// i386 TLS slots (struct user_desc).
+pub const NT_386_TLS: u32 = 0x200;
+/// x86 io permission bitmap (1=deny).
+pub const NT_386_IOPERM: u32 = 0x201;
+/// x86 extended state using xsave.
+pub const NT_X86_XSTATE: u32 = 0x202;
+/// s390 upper register halves.
+pub const NT_S390_HIGH_GPRS: u32 = 0x300;
+/// s390 timer register.
+pub const NT_S390_TIMER: u32 = 0x301;
+/// s390 TOD clock comparator register.
+pub const NT_S390_TODCMP: u32 = 0x302;
+/// s390 TOD programmable register.
+pub const NT_S390_TODPREG: u32 = 0x303;
+/// s390 control registers.
+pub const NT_S390_CTRS: u32 = 0x304;
+/// s390 prefix register.
+pub const NT_S390_PREFIX: u32 = 0x305;
+/// s390 breaking event address.
+pub const NT_S390_LAST_BREAK: u32 = 0x306;
+/// s390 system call restart data.
+pub const NT_S390_SYSTEM_CALL: u32 = 0x307;
+/// s390 transaction diagnostic block.
+pub const NT_S390_TDB: u32 = 0x308;
+/// s390 vector registers 0-15 upper half.
+pub const NT_S390_VXRS_LOW: u32 = 0x309;
+/// s390 vector registers 16-31.
+pub const NT_S390_VXRS_HIGH: u32 = 0x30a;
+/// s390 guarded storage registers.
+pub const NT_S390_GS_CB: u32 = 0x30b;
+/// s390 guarded storage broadcast control block.
+pub const NT_S390_GS_BC: u32 = 0x30c;
+/// s390 runtime instrumentation.
+pub const NT_S390_RI_CB: u32 = 0x30d;
+/// ARM VFP/NEON registers.
+pub const NT_ARM_VFP: u32 = 0x400;
+/// ARM TLS register.
+pub const NT_ARM_TLS: u32 = 0x401;
+/// ARM hardware breakpoint registers.
+pub const NT_ARM_HW_BREAK: u32 = 0x402;
+/// ARM hardware watchpoint registers.
+pub const NT_ARM_HW_WATCH: u32 = 0x403;
+/// ARM system call number.
+pub const NT_ARM_SYSTEM_CALL: u32 = 0x404;
+/// ARM Scalable Vector Extension registers.
+pub const NT_ARM_SVE: u32 = 0x405;
+/// Vmcore Device Dump Note.
+pub const NT_VMCOREDD: u32 = 0x700;
+/// MIPS DSP ASE registers.
+pub const NT_MIPS_DSP: u32 = 0x800;
+/// MIPS floating-point mode.
+pub const NT_MIPS_FP_MODE: u32 = 0x801;
+
+/// Note type for version string.
+///
+/// This note may appear in object files.
+///
+/// It must be handled as a special case because it has no descriptor, and instead
+/// uses the note name as the version string.
+pub const NT_VERSION: u32 = 1;
+
+/// Dynamic section entry.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct Dyn32<E: Endian> {
+    /// Dynamic entry type.
+    pub d_tag: U32<E>,
+    /// Value (integer or address).
+    pub d_val: U32<E>,
+}
+
+/// Dynamic section entry.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct Dyn64<E: Endian> {
+    /// Dynamic entry type.
+    pub d_tag: U64<E>,
+    /// Value (integer or address).
+    pub d_val: U64<E>,
+}
+
+// Values for `Dyn*::d_tag`.
+
+/// Marks end of dynamic section
+pub const DT_NULL: u32 = 0;
+/// Name of needed library
+pub const DT_NEEDED: u32 = 1;
+/// Size in bytes of PLT relocs
+pub const DT_PLTRELSZ: u32 = 2;
+/// Processor defined value
+pub const DT_PLTGOT: u32 = 3;
+/// Address of symbol hash table
+pub const DT_HASH: u32 = 4;
+/// Address of string table
+pub const DT_STRTAB: u32 = 5;
+/// Address of symbol table
+pub const DT_SYMTAB: u32 = 6;
+/// Address of Rela relocs
+pub const DT_RELA: u32 = 7;
+/// Total size of Rela relocs
+pub const DT_RELASZ: u32 = 8;
+/// Size of one Rela reloc
+pub const DT_RELAENT: u32 = 9;
+/// Size of string table
+pub const DT_STRSZ: u32 = 10;
+/// Size of one symbol table entry
+pub const DT_SYMENT: u32 = 11;
+/// Address of init function
+pub const DT_INIT: u32 = 12;
+/// Address of termination function
+pub const DT_FINI: u32 = 13;
+/// Name of shared object
+pub const DT_SONAME: u32 = 14;
+/// Library search path (deprecated)
+pub const DT_RPATH: u32 = 15;
+/// Start symbol search here
+pub const DT_SYMBOLIC: u32 = 16;
+/// Address of Rel relocs
+pub const DT_REL: u32 = 17;
+/// Total size of Rel relocs
+pub const DT_RELSZ: u32 = 18;
+/// Size of one Rel reloc
+pub const DT_RELENT: u32 = 19;
+/// Type of reloc in PLT
+pub const DT_PLTREL: u32 = 20;
+/// For debugging; unspecified
+pub const DT_DEBUG: u32 = 21;
+/// Reloc might modify .text
+pub const DT_TEXTREL: u32 = 22;
+/// Address of PLT relocs
+pub const DT_JMPREL: u32 = 23;
+/// Process relocations of object
+pub const DT_BIND_NOW: u32 = 24;
+/// Array with addresses of init fct
+pub const DT_INIT_ARRAY: u32 = 25;
+/// Array with addresses of fini fct
+pub const DT_FINI_ARRAY: u32 = 26;
+/// Size in bytes of DT_INIT_ARRAY
+pub const DT_INIT_ARRAYSZ: u32 = 27;
+/// Size in bytes of DT_FINI_ARRAY
+pub const DT_FINI_ARRAYSZ: u32 = 28;
+/// Library search path
+pub const DT_RUNPATH: u32 = 29;
+/// Flags for the object being loaded
+pub const DT_FLAGS: u32 = 30;
+/// Start of encoded range
+pub const DT_ENCODING: u32 = 32;
+/// Array with addresses of preinit fct
+pub const DT_PREINIT_ARRAY: u32 = 32;
+/// size in bytes of DT_PREINIT_ARRAY
+pub const DT_PREINIT_ARRAYSZ: u32 = 33;
+/// Address of SYMTAB_SHNDX section
+pub const DT_SYMTAB_SHNDX: u32 = 34;
+/// Start of OS-specific
+pub const DT_LOOS: u32 = 0x6000_000d;
+/// End of OS-specific
+pub const DT_HIOS: u32 = 0x6fff_f000;
+/// Start of processor-specific
+pub const DT_LOPROC: u32 = 0x7000_0000;
+/// End of processor-specific
+pub const DT_HIPROC: u32 = 0x7fff_ffff;
+
+// `DT_*` entries between `DT_VALRNGHI` & `DT_VALRNGLO` use `d_val` as a value.
+#[allow(missing_docs)]
+pub const DT_VALRNGLO: u32 = 0x6fff_fd00;
+/// Prelinking timestamp
+pub const DT_GNU_PRELINKED: u32 = 0x6fff_fdf5;
+/// Size of conflict section
+pub const DT_GNU_CONFLICTSZ: u32 = 0x6fff_fdf6;
+/// Size of library list
+pub const DT_GNU_LIBLISTSZ: u32 = 0x6fff_fdf7;
+#[allow(missing_docs)]
+pub const DT_CHECKSUM: u32 = 0x6fff_fdf8;
+#[allow(missing_docs)]
+pub const DT_PLTPADSZ: u32 = 0x6fff_fdf9;
+#[allow(missing_docs)]
+pub const DT_MOVEENT: u32 = 0x6fff_fdfa;
+#[allow(missing_docs)]
+pub const DT_MOVESZ: u32 = 0x6fff_fdfb;
+/// Feature selection (DTF_*).
+pub const DT_FEATURE_1: u32 = 0x6fff_fdfc;
+/// Flags for DT_* entries, affecting the following DT_* entry.
+pub const DT_POSFLAG_1: u32 = 0x6fff_fdfd;
+/// Size of syminfo table (in bytes)
+pub const DT_SYMINSZ: u32 = 0x6fff_fdfe;
+/// Entry size of syminfo
+pub const DT_SYMINENT: u32 = 0x6fff_fdff;
+#[allow(missing_docs)]
+pub const DT_VALRNGHI: u32 = 0x6fff_fdff;
+
+// `DT_*` entries between `DT_ADDRRNGHI` & `DT_ADDRRNGLO` use `d_val` as an address.
+//
+// If any adjustment is made to the ELF object after it has been
+// built these entries will need to be adjusted.
+#[allow(missing_docs)]
+pub const DT_ADDRRNGLO: u32 = 0x6fff_fe00;
+/// GNU-style hash table.
+pub const DT_GNU_HASH: u32 = 0x6fff_fef5;
+#[allow(missing_docs)]
+pub const DT_TLSDESC_PLT: u32 = 0x6fff_fef6;
+#[allow(missing_docs)]
+pub const DT_TLSDESC_GOT: u32 = 0x6fff_fef7;
+/// Start of conflict section
+pub const DT_GNU_CONFLICT: u32 = 0x6fff_fef8;
+/// Library list
+pub const DT_GNU_LIBLIST: u32 = 0x6fff_fef9;
+/// Configuration information.
+pub const DT_CONFIG: u32 = 0x6fff_fefa;
+/// Dependency auditing.
+pub const DT_DEPAUDIT: u32 = 0x6fff_fefb;
+/// Object auditing.
+pub const DT_AUDIT: u32 = 0x6fff_fefc;
+/// PLT padding.
+pub const DT_PLTPAD: u32 = 0x6fff_fefd;
+/// Move table.
+pub const DT_MOVETAB: u32 = 0x6fff_fefe;
+/// Syminfo table.
+pub const DT_SYMINFO: u32 = 0x6fff_feff;
+#[allow(missing_docs)]
+pub const DT_ADDRRNGHI: u32 = 0x6fff_feff;
+
+// The versioning entry types.  The next are defined as part of the
+// GNU extension.
+#[allow(missing_docs)]
+pub const DT_VERSYM: u32 = 0x6fff_fff0;
+#[allow(missing_docs)]
+pub const DT_RELACOUNT: u32 = 0x6fff_fff9;
+#[allow(missing_docs)]
+pub const DT_RELCOUNT: u32 = 0x6fff_fffa;
+/// State flags, see DF_1_* below.
+pub const DT_FLAGS_1: u32 = 0x6fff_fffb;
+/// Address of version definition table
+pub const DT_VERDEF: u32 = 0x6fff_fffc;
+/// Number of version definitions
+pub const DT_VERDEFNUM: u32 = 0x6fff_fffd;
+/// Address of table with needed versions
+pub const DT_VERNEED: u32 = 0x6fff_fffe;
+/// Number of needed versions
+pub const DT_VERNEEDNUM: u32 = 0x6fff_ffff;
+
+// Machine-independent extensions in the "processor-specific" range.
+/// Shared object to load before self
+pub const DT_AUXILIARY: u32 = 0x7fff_fffd;
+/// Shared object to get values from
+pub const DT_FILTER: u32 = 0x7fff_ffff;
+
+// Values of `Dyn*::d_val` in the `DT_FLAGS` entry.
+/// Object may use DF_ORIGIN
+pub const DF_ORIGIN: u32 = 0x0000_0001;
+/// Symbol resolutions starts here
+pub const DF_SYMBOLIC: u32 = 0x0000_0002;
+/// Object contains text relocations
+pub const DF_TEXTREL: u32 = 0x0000_0004;
+/// No lazy binding for this object
+pub const DF_BIND_NOW: u32 = 0x0000_0008;
+/// Module uses the static TLS model
+pub const DF_STATIC_TLS: u32 = 0x0000_0010;
+
+// Values of `Dyn*::d_val` in the `DT_FLAGS_1` entry.
+/// Set RTLD_NOW for this object.
+pub const DF_1_NOW: u32 = 0x0000_0001;
+/// Set RTLD_GLOBAL for this object.
+pub const DF_1_GLOBAL: u32 = 0x0000_0002;
+/// Set RTLD_GROUP for this object.
+pub const DF_1_GROUP: u32 = 0x0000_0004;
+/// Set RTLD_NODELETE for this object.
+pub const DF_1_NODELETE: u32 = 0x0000_0008;
+/// Trigger filtee loading at runtime.
+pub const DF_1_LOADFLTR: u32 = 0x0000_0010;
+/// Set RTLD_INITFIRST for this object.
+pub const DF_1_INITFIRST: u32 = 0x0000_0020;
+/// Set RTLD_NOOPEN for this object.
+pub const DF_1_NOOPEN: u32 = 0x0000_0040;
+/// $ORIGIN must be handled.
+pub const DF_1_ORIGIN: u32 = 0x0000_0080;
+/// Direct binding enabled.
+pub const DF_1_DIRECT: u32 = 0x0000_0100;
+#[allow(missing_docs)]
+pub const DF_1_TRANS: u32 = 0x0000_0200;
+/// Object is used to interpose.
+pub const DF_1_INTERPOSE: u32 = 0x0000_0400;
+/// Ignore default lib search path.
+pub const DF_1_NODEFLIB: u32 = 0x0000_0800;
+/// Object can't be dldump'ed.
+pub const DF_1_NODUMP: u32 = 0x0000_1000;
+/// Configuration alternative created.
+pub const DF_1_CONFALT: u32 = 0x0000_2000;
+/// Filtee terminates filters search.
+pub const DF_1_ENDFILTEE: u32 = 0x0000_4000;
+/// Disp reloc applied at build time.
+pub const DF_1_DISPRELDNE: u32 = 0x0000_8000;
+/// Disp reloc applied at run-time.
+pub const DF_1_DISPRELPND: u32 = 0x0001_0000;
+/// Object has no-direct binding.
+pub const DF_1_NODIRECT: u32 = 0x0002_0000;
+#[allow(missing_docs)]
+pub const DF_1_IGNMULDEF: u32 = 0x0004_0000;
+#[allow(missing_docs)]
+pub const DF_1_NOKSYMS: u32 = 0x0008_0000;
+#[allow(missing_docs)]
+pub const DF_1_NOHDR: u32 = 0x0010_0000;
+/// Object is modified after built.
+pub const DF_1_EDITED: u32 = 0x0020_0000;
+#[allow(missing_docs)]
+pub const DF_1_NORELOC: u32 = 0x0040_0000;
+/// Object has individual interposers.
+pub const DF_1_SYMINTPOSE: u32 = 0x0080_0000;
+/// Global auditing required.
+pub const DF_1_GLOBAUDIT: u32 = 0x0100_0000;
+/// Singleton symbols are used.
+pub const DF_1_SINGLETON: u32 = 0x0200_0000;
+#[allow(missing_docs)]
+pub const DF_1_STUB: u32 = 0x0400_0000;
+#[allow(missing_docs)]
+pub const DF_1_PIE: u32 = 0x0800_0000;
+
+/// Version symbol information
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct Versym<E: Endian>(pub U16<E>);
+
+/// Symbol is hidden.
+pub const VERSYM_HIDDEN: u16 = 0x8000;
+/// Symbol version index.
+pub const VERSYM_VERSION: u16 = 0x7fff;
+
+/// Version definition sections
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct Verdef<E: Endian> {
+    /// Version revision
+    pub vd_version: U16<E>,
+    /// Version information
+    pub vd_flags: U16<E>,
+    /// Version Index
+    pub vd_ndx: U16<E>,
+    /// Number of associated aux entries
+    pub vd_cnt: U16<E>,
+    /// Version name hash value
+    pub vd_hash: U32<E>,
+    /// Offset in bytes to verdaux array
+    pub vd_aux: U32<E>,
+    /// Offset in bytes to next verdef entry
+    pub vd_next: U32<E>,
+}
+
+// Legal values for vd_version (version revision).
+/// No version
+pub const VER_DEF_NONE: u16 = 0;
+/// Current version
+pub const VER_DEF_CURRENT: u16 = 1;
+
+// Legal values for vd_flags (version information flags).
+/// Version definition of file itself
+pub const VER_FLG_BASE: u16 = 0x1;
+// Legal values for vd_flags and vna_flags (version information flags).
+/// Weak version identifier
+pub const VER_FLG_WEAK: u16 = 0x2;
+
+// Versym symbol index values.
+/// Symbol is local.
+pub const VER_NDX_LOCAL: u16 = 0;
+/// Symbol is global.
+pub const VER_NDX_GLOBAL: u16 = 1;
+
+/// Auxiliary version information.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct Verdaux<E: Endian> {
+    /// Version or dependency names
+    pub vda_name: U32<E>,
+    /// Offset in bytes to next verdaux
+    pub vda_next: U32<E>,
+}
+
+/// Version dependency.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct Verneed<E: Endian> {
+    /// Version of structure
+    pub vn_version: U16<E>,
+    /// Number of associated aux entries
+    pub vn_cnt: U16<E>,
+    /// Offset of filename for this dependency
+    pub vn_file: U32<E>,
+    /// Offset in bytes to vernaux array
+    pub vn_aux: U32<E>,
+    /// Offset in bytes to next verneed entry
+    pub vn_next: U32<E>,
+}
+
+// Legal values for vn_version (version revision).
+/// No version
+pub const VER_NEED_NONE: u16 = 0;
+/// Current version
+pub const VER_NEED_CURRENT: u16 = 1;
+
+/// Auxiliary needed version information.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct Vernaux<E: Endian> {
+    /// Hash value of dependency name
+    pub vna_hash: U32<E>,
+    /// Dependency specific information
+    pub vna_flags: U16<E>,
+    /// Version Index
+    pub vna_other: U16<E>,
+    /// Dependency name string offset
+    pub vna_name: U32<E>,
+    /// Offset in bytes to next vernaux entry
+    pub vna_next: U32<E>,
+}
+
+// TODO: Elf*_auxv_t, AT_*
+
+/// Note section entry header.
+///
+/// A note consists of a header followed by a variable length name and descriptor.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct NoteHeader32<E: Endian> {
+    /// Length of the note's name.
+    ///
+    /// Some known names are defined by the `ELF_NOTE_*` constants.
+    pub n_namesz: U32<E>,
+    /// Length of the note's descriptor.
+    ///
+    /// The content of the descriptor depends on the note name and type.
+    pub n_descsz: U32<E>,
+    /// Type of the note.
+    ///
+    /// One of the `NT_*` constants. The note name determines which
+    /// `NT_*` constants are valid.
+    pub n_type: U32<E>,
+}
+
+/// Note section entry header.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct NoteHeader64<E: Endian> {
+    /// Length of the note's name.
+    ///
+    /// Some known names are defined by the `ELF_NOTE_*` constants.
+    pub n_namesz: U32<E>,
+    /// Length of the note's descriptor.
+    ///
+    /// The content of the descriptor depends on the note name and type.
+    pub n_descsz: U32<E>,
+    /// Type of the note.
+    ///
+    /// One of the `NT_*` constants. The note name determines which
+    /// `NT_*` constants are valid.
+    pub n_type: U32<E>,
+}
+
+/// Solaris entries in the note section have this name.
+pub static ELF_NOTE_SOLARIS: &[u8] = b"SUNW Solaris";
+
+// Values for `n_type` when the name is `ELF_NOTE_SOLARIS`.
+/// Desired pagesize for the binary.
+pub const NT_SOLARIS_PAGESIZE_HINT: u32 = 1;
+
+/// GNU entries in the note section have this name.
+pub static ELF_NOTE_GNU: &[u8] = b"GNU";
+
+// Note types for `ELF_NOTE_GNU`.
+
+/// ABI information.
+///
+/// The descriptor consists of words:
+/// - word 0: OS descriptor
+/// - word 1: major version of the ABI
+/// - word 2: minor version of the ABI
+/// - word 3: subminor version of the ABI
+pub const NT_GNU_ABI_TAG: u32 = 1;
+
+/// OS descriptor for `NT_GNU_ABI_TAG`.
+pub const ELF_NOTE_OS_LINUX: u32 = 0;
+/// OS descriptor for `NT_GNU_ABI_TAG`.
+pub const ELF_NOTE_OS_GNU: u32 = 1;
+/// OS descriptor for `NT_GNU_ABI_TAG`.
+pub const ELF_NOTE_OS_SOLARIS2: u32 = 2;
+/// OS descriptor for `NT_GNU_ABI_TAG`.
+pub const ELF_NOTE_OS_FREEBSD: u32 = 3;
+
+/// Synthetic hwcap information.
+///
+/// The descriptor begins with two words:
+/// - word 0: number of entries
+/// - word 1: bitmask of enabled entries
+/// Then follow variable-length entries, one byte followed by a
+/// '\0'-terminated hwcap name string.  The byte gives the bit
+/// number to test if enabled, (1U << bit) & bitmask.  */
+pub const NT_GNU_HWCAP: u32 = 2;
+
+/// Build ID bits as generated by `ld --build-id`.
+///
+/// The descriptor consists of any nonzero number of bytes.
+pub const NT_GNU_BUILD_ID: u32 = 3;
+
+/// Version note generated by GNU gold containing a version string.
+pub const NT_GNU_GOLD_VERSION: u32 = 4;
+
+/// Program property.
+pub const NT_GNU_PROPERTY_TYPE_0: u32 = 5;
+
+// TODO: GNU_PROPERTY_*
+// TODO: Elf*_Move
+
+/// Header of `SHT_HASH` section.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct HashHeader<E: Endian> {
+    /// The number of hash buckets.
+    pub bucket_count: U32<E>,
+    /// The number of chain values.
+    pub chain_count: U32<E>,
+    // Array of hash bucket start indices.
+    // buckets: U32<E>[bucket_count]
+    // Array of hash chain links. An index of 0 terminates the chain.
+    // chains: U32<E>[chain_count]
+}
+
+/// Calculate the SysV hash for a symbol name.
+///
+/// Used for `SHT_HASH`.
+pub fn hash(name: &[u8]) -> u32 {
+    let mut hash = 0u32;
+    for byte in name {
+        hash = hash.wrapping_mul(16).wrapping_add(u32::from(*byte));
+        hash ^= (hash >> 24) & 0xf0;
+    }
+    hash & 0xfff_ffff
+}
+
+/// Header of `SHT_GNU_HASH` section.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct GnuHashHeader<E: Endian> {
+    /// The number of hash buckets.
+    pub bucket_count: U32<E>,
+    /// The symbol table index of the first symbol in the hash.
+    pub symbol_base: U32<E>,
+    /// The number of words in the bloom filter.
+    ///
+    /// Must be a non-zero power of 2.
+    pub bloom_count: U32<E>,
+    /// The bit shift count for the bloom filter.
+    pub bloom_shift: U32<E>,
+    // Array of bloom filter words.
+    // bloom_filters: U32<E>[bloom_count] or U64<E>[bloom_count]
+    // Array of hash bucket start indices.
+    // buckets: U32<E>[bucket_count]
+    // Array of hash values, one for each symbol starting at symbol_base.
+    // values: U32<E>[symbol_count]
+}
+
+/// Calculate the GNU hash for a symbol name.
+///
+/// Used for `SHT_GNU_HASH`.
+pub fn gnu_hash(name: &[u8]) -> u32 {
+    let mut hash = 5381u32;
+    for byte in name {
+        hash = hash.wrapping_mul(33).wrapping_add(u32::from(*byte));
+    }
+    hash
+}
+
+// Motorola 68k specific definitions.
+
+// m68k values for `Rel*::r_type`.
+
+/// No reloc
+pub const R_68K_NONE: u32 = 0;
+/// Direct 32 bit
+pub const R_68K_32: u32 = 1;
+/// Direct 16 bit
+pub const R_68K_16: u32 = 2;
+/// Direct 8 bit
+pub const R_68K_8: u32 = 3;
+/// PC relative 32 bit
+pub const R_68K_PC32: u32 = 4;
+/// PC relative 16 bit
+pub const R_68K_PC16: u32 = 5;
+/// PC relative 8 bit
+pub const R_68K_PC8: u32 = 6;
+/// 32 bit PC relative GOT entry
+pub const R_68K_GOT32: u32 = 7;
+/// 16 bit PC relative GOT entry
+pub const R_68K_GOT16: u32 = 8;
+/// 8 bit PC relative GOT entry
+pub const R_68K_GOT8: u32 = 9;
+/// 32 bit GOT offset
+pub const R_68K_GOT32O: u32 = 10;
+/// 16 bit GOT offset
+pub const R_68K_GOT16O: u32 = 11;
+/// 8 bit GOT offset
+pub const R_68K_GOT8O: u32 = 12;
+/// 32 bit PC relative PLT address
+pub const R_68K_PLT32: u32 = 13;
+/// 16 bit PC relative PLT address
+pub const R_68K_PLT16: u32 = 14;
+/// 8 bit PC relative PLT address
+pub const R_68K_PLT8: u32 = 15;
+/// 32 bit PLT offset
+pub const R_68K_PLT32O: u32 = 16;
+/// 16 bit PLT offset
+pub const R_68K_PLT16O: u32 = 17;
+/// 8 bit PLT offset
+pub const R_68K_PLT8O: u32 = 18;
+/// Copy symbol at runtime
+pub const R_68K_COPY: u32 = 19;
+/// Create GOT entry
+pub const R_68K_GLOB_DAT: u32 = 20;
+/// Create PLT entry
+pub const R_68K_JMP_SLOT: u32 = 21;
+/// Adjust by program base
+pub const R_68K_RELATIVE: u32 = 22;
+/// 32 bit GOT offset for GD
+pub const R_68K_TLS_GD32: u32 = 25;
+/// 16 bit GOT offset for GD
+pub const R_68K_TLS_GD16: u32 = 26;
+/// 8 bit GOT offset for GD
+pub const R_68K_TLS_GD8: u32 = 27;
+/// 32 bit GOT offset for LDM
+pub const R_68K_TLS_LDM32: u32 = 28;
+/// 16 bit GOT offset for LDM
+pub const R_68K_TLS_LDM16: u32 = 29;
+/// 8 bit GOT offset for LDM
+pub const R_68K_TLS_LDM8: u32 = 30;
+/// 32 bit module-relative offset
+pub const R_68K_TLS_LDO32: u32 = 31;
+/// 16 bit module-relative offset
+pub const R_68K_TLS_LDO16: u32 = 32;
+/// 8 bit module-relative offset
+pub const R_68K_TLS_LDO8: u32 = 33;
+/// 32 bit GOT offset for IE
+pub const R_68K_TLS_IE32: u32 = 34;
+/// 16 bit GOT offset for IE
+pub const R_68K_TLS_IE16: u32 = 35;
+/// 8 bit GOT offset for IE
+pub const R_68K_TLS_IE8: u32 = 36;
+/// 32 bit offset relative to static TLS block
+pub const R_68K_TLS_LE32: u32 = 37;
+/// 16 bit offset relative to static TLS block
+pub const R_68K_TLS_LE16: u32 = 38;
+/// 8 bit offset relative to static TLS block
+pub const R_68K_TLS_LE8: u32 = 39;
+/// 32 bit module number
+pub const R_68K_TLS_DTPMOD32: u32 = 40;
+/// 32 bit module-relative offset
+pub const R_68K_TLS_DTPREL32: u32 = 41;
+/// 32 bit TP-relative offset
+pub const R_68K_TLS_TPREL32: u32 = 42;
+
+// Intel 80386 specific definitions.
+
+// i386 values for `Rel*::r_type`.
+
+/// No reloc
+pub const R_386_NONE: u32 = 0;
+/// Direct 32 bit
+pub const R_386_32: u32 = 1;
+/// PC relative 32 bit
+pub const R_386_PC32: u32 = 2;
+/// 32 bit GOT entry
+pub const R_386_GOT32: u32 = 3;
+/// 32 bit PLT address
+pub const R_386_PLT32: u32 = 4;
+/// Copy symbol at runtime
+pub const R_386_COPY: u32 = 5;
+/// Create GOT entry
+pub const R_386_GLOB_DAT: u32 = 6;
+/// Create PLT entry
+pub const R_386_JMP_SLOT: u32 = 7;
+/// Adjust by program base
+pub const R_386_RELATIVE: u32 = 8;
+/// 32 bit offset to GOT
+pub const R_386_GOTOFF: u32 = 9;
+/// 32 bit PC relative offset to GOT
+pub const R_386_GOTPC: u32 = 10;
+/// Direct 32 bit PLT address
+pub const R_386_32PLT: u32 = 11;
+/// Offset in static TLS block
+pub const R_386_TLS_TPOFF: u32 = 14;
+/// Address of GOT entry for static TLS block offset
+pub const R_386_TLS_IE: u32 = 15;
+/// GOT entry for static TLS block offset
+pub const R_386_TLS_GOTIE: u32 = 16;
+/// Offset relative to static TLS block
+pub const R_386_TLS_LE: u32 = 17;
+/// Direct 32 bit for GNU version of general dynamic thread local data
+pub const R_386_TLS_GD: u32 = 18;
+/// Direct 32 bit for GNU version of local dynamic thread local data in LE code
+pub const R_386_TLS_LDM: u32 = 19;
+/// Direct 16 bit
+pub const R_386_16: u32 = 20;
+/// PC relative 16 bit
+pub const R_386_PC16: u32 = 21;
+/// Direct 8 bit
+pub const R_386_8: u32 = 22;
+/// PC relative 8 bit
+pub const R_386_PC8: u32 = 23;
+/// Direct 32 bit for general dynamic thread local data
+pub const R_386_TLS_GD_32: u32 = 24;
+/// Tag for pushl in GD TLS code
+pub const R_386_TLS_GD_PUSH: u32 = 25;
+/// Relocation for call to __tls_get_addr()
+pub const R_386_TLS_GD_CALL: u32 = 26;
+/// Tag for popl in GD TLS code
+pub const R_386_TLS_GD_POP: u32 = 27;
+/// Direct 32 bit for local dynamic thread local data in LE code
+pub const R_386_TLS_LDM_32: u32 = 28;
+/// Tag for pushl in LDM TLS code
+pub const R_386_TLS_LDM_PUSH: u32 = 29;
+/// Relocation for call to __tls_get_addr() in LDM code
+pub const R_386_TLS_LDM_CALL: u32 = 30;
+/// Tag for popl in LDM TLS code
+pub const R_386_TLS_LDM_POP: u32 = 31;
+/// Offset relative to TLS block
+pub const R_386_TLS_LDO_32: u32 = 32;
+/// GOT entry for negated static TLS block offset
+pub const R_386_TLS_IE_32: u32 = 33;
+/// Negated offset relative to static TLS block
+pub const R_386_TLS_LE_32: u32 = 34;
+/// ID of module containing symbol
+pub const R_386_TLS_DTPMOD32: u32 = 35;
+/// Offset in TLS block
+pub const R_386_TLS_DTPOFF32: u32 = 36;
+/// Negated offset in static TLS block
+pub const R_386_TLS_TPOFF32: u32 = 37;
+/// 32-bit symbol size
+pub const R_386_SIZE32: u32 = 38;
+/// GOT offset for TLS descriptor.
+pub const R_386_TLS_GOTDESC: u32 = 39;
+/// Marker of call through TLS descriptor for relaxation.
+pub const R_386_TLS_DESC_CALL: u32 = 40;
+/// TLS descriptor containing pointer to code and to argument, returning the TLS offset for the symbol.
+pub const R_386_TLS_DESC: u32 = 41;
+/// Adjust indirectly by program base
+pub const R_386_IRELATIVE: u32 = 42;
+/// Load from 32 bit GOT entry, relaxable.
+pub const R_386_GOT32X: u32 = 43;
+
+// SUN SPARC specific definitions.
+
+// SPARC values for `st_type` component of `Sym*::st_info`.
+
+/// Global register reserved to app.
+pub const STT_SPARC_REGISTER: u8 = 13;
+
+// SPARC values for `FileHeader64::e_flags`.
+
+#[allow(missing_docs)]
+pub const EF_SPARCV9_MM: u32 = 3;
+#[allow(missing_docs)]
+pub const EF_SPARCV9_TSO: u32 = 0;
+#[allow(missing_docs)]
+pub const EF_SPARCV9_PSO: u32 = 1;
+#[allow(missing_docs)]
+pub const EF_SPARCV9_RMO: u32 = 2;
+/// little endian data
+pub const EF_SPARC_LEDATA: u32 = 0x80_0000;
+#[allow(missing_docs)]
+pub const EF_SPARC_EXT_MASK: u32 = 0xFF_FF00;
+/// generic V8+ features
+pub const EF_SPARC_32PLUS: u32 = 0x00_0100;
+/// Sun UltraSPARC1 extensions
+pub const EF_SPARC_SUN_US1: u32 = 0x00_0200;
+/// HAL R1 extensions
+pub const EF_SPARC_HAL_R1: u32 = 0x00_0400;
+/// Sun UltraSPARCIII extensions
+pub const EF_SPARC_SUN_US3: u32 = 0x00_0800;
+
+// SPARC values for `Rel*::r_type`.
+
+/// No reloc
+pub const R_SPARC_NONE: u32 = 0;
+/// Direct 8 bit
+pub const R_SPARC_8: u32 = 1;
+/// Direct 16 bit
+pub const R_SPARC_16: u32 = 2;
+/// Direct 32 bit
+pub const R_SPARC_32: u32 = 3;
+/// PC relative 8 bit
+pub const R_SPARC_DISP8: u32 = 4;
+/// PC relative 16 bit
+pub const R_SPARC_DISP16: u32 = 5;
+/// PC relative 32 bit
+pub const R_SPARC_DISP32: u32 = 6;
+/// PC relative 30 bit shifted
+pub const R_SPARC_WDISP30: u32 = 7;
+/// PC relative 22 bit shifted
+pub const R_SPARC_WDISP22: u32 = 8;
+/// High 22 bit
+pub const R_SPARC_HI22: u32 = 9;
+/// Direct 22 bit
+pub const R_SPARC_22: u32 = 10;
+/// Direct 13 bit
+pub const R_SPARC_13: u32 = 11;
+/// Truncated 10 bit
+pub const R_SPARC_LO10: u32 = 12;
+/// Truncated 10 bit GOT entry
+pub const R_SPARC_GOT10: u32 = 13;
+/// 13 bit GOT entry
+pub const R_SPARC_GOT13: u32 = 14;
+/// 22 bit GOT entry shifted
+pub const R_SPARC_GOT22: u32 = 15;
+/// PC relative 10 bit truncated
+pub const R_SPARC_PC10: u32 = 16;
+/// PC relative 22 bit shifted
+pub const R_SPARC_PC22: u32 = 17;
+/// 30 bit PC relative PLT address
+pub const R_SPARC_WPLT30: u32 = 18;
+/// Copy symbol at runtime
+pub const R_SPARC_COPY: u32 = 19;
+/// Create GOT entry
+pub const R_SPARC_GLOB_DAT: u32 = 20;
+/// Create PLT entry
+pub const R_SPARC_JMP_SLOT: u32 = 21;
+/// Adjust by program base
+pub const R_SPARC_RELATIVE: u32 = 22;
+/// Direct 32 bit unaligned
+pub const R_SPARC_UA32: u32 = 23;
+
+// Sparc64 values for `Rel*::r_type`.
+
+/// Direct 32 bit ref to PLT entry
+pub const R_SPARC_PLT32: u32 = 24;
+/// High 22 bit PLT entry
+pub const R_SPARC_HIPLT22: u32 = 25;
+/// Truncated 10 bit PLT entry
+pub const R_SPARC_LOPLT10: u32 = 26;
+/// PC rel 32 bit ref to PLT entry
+pub const R_SPARC_PCPLT32: u32 = 27;
+/// PC rel high 22 bit PLT entry
+pub const R_SPARC_PCPLT22: u32 = 28;
+/// PC rel trunc 10 bit PLT entry
+pub const R_SPARC_PCPLT10: u32 = 29;
+/// Direct 10 bit
+pub const R_SPARC_10: u32 = 30;
+/// Direct 11 bit
+pub const R_SPARC_11: u32 = 31;
+/// Direct 64 bit
+pub const R_SPARC_64: u32 = 32;
+/// 10bit with secondary 13bit addend
+pub const R_SPARC_OLO10: u32 = 33;
+/// Top 22 bits of direct 64 bit
+pub const R_SPARC_HH22: u32 = 34;
+/// High middle 10 bits of ...
+pub const R_SPARC_HM10: u32 = 35;
+/// Low middle 22 bits of ...
+pub const R_SPARC_LM22: u32 = 36;
+/// Top 22 bits of pc rel 64 bit
+pub const R_SPARC_PC_HH22: u32 = 37;
+/// High middle 10 bit of ...
+pub const R_SPARC_PC_HM10: u32 = 38;
+/// Low miggle 22 bits of ...
+pub const R_SPARC_PC_LM22: u32 = 39;
+/// PC relative 16 bit shifted
+pub const R_SPARC_WDISP16: u32 = 40;
+/// PC relative 19 bit shifted
+pub const R_SPARC_WDISP19: u32 = 41;
+/// was part of v9 ABI but was removed
+pub const R_SPARC_GLOB_JMP: u32 = 42;
+/// Direct 7 bit
+pub const R_SPARC_7: u32 = 43;
+/// Direct 5 bit
+pub const R_SPARC_5: u32 = 44;
+/// Direct 6 bit
+pub const R_SPARC_6: u32 = 45;
+/// PC relative 64 bit
+pub const R_SPARC_DISP64: u32 = 46;
+/// Direct 64 bit ref to PLT entry
+pub const R_SPARC_PLT64: u32 = 47;
+/// High 22 bit complemented
+pub const R_SPARC_HIX22: u32 = 48;
+/// Truncated 11 bit complemented
+pub const R_SPARC_LOX10: u32 = 49;
+/// Direct high 12 of 44 bit
+pub const R_SPARC_H44: u32 = 50;
+/// Direct mid 22 of 44 bit
+pub const R_SPARC_M44: u32 = 51;
+/// Direct low 10 of 44 bit
+pub const R_SPARC_L44: u32 = 52;
+/// Global register usage
+pub const R_SPARC_REGISTER: u32 = 53;
+/// Direct 64 bit unaligned
+pub const R_SPARC_UA64: u32 = 54;
+/// Direct 16 bit unaligned
+pub const R_SPARC_UA16: u32 = 55;
+#[allow(missing_docs)]
+pub const R_SPARC_TLS_GD_HI22: u32 = 56;
+#[allow(missing_docs)]
+pub const R_SPARC_TLS_GD_LO10: u32 = 57;
+#[allow(missing_docs)]
+pub const R_SPARC_TLS_GD_ADD: u32 = 58;
+#[allow(missing_docs)]
+pub const R_SPARC_TLS_GD_CALL: u32 = 59;
+#[allow(missing_docs)]
+pub const R_SPARC_TLS_LDM_HI22: u32 = 60;
+#[allow(missing_docs)]
+pub const R_SPARC_TLS_LDM_LO10: u32 = 61;
+#[allow(missing_docs)]
+pub const R_SPARC_TLS_LDM_ADD: u32 = 62;
+#[allow(missing_docs)]
+pub const R_SPARC_TLS_LDM_CALL: u32 = 63;
+#[allow(missing_docs)]
+pub const R_SPARC_TLS_LDO_HIX22: u32 = 64;
+#[allow(missing_docs)]
+pub const R_SPARC_TLS_LDO_LOX10: u32 = 65;
+#[allow(missing_docs)]
+pub const R_SPARC_TLS_LDO_ADD: u32 = 66;
+#[allow(missing_docs)]
+pub const R_SPARC_TLS_IE_HI22: u32 = 67;
+#[allow(missing_docs)]
+pub const R_SPARC_TLS_IE_LO10: u32 = 68;
+#[allow(missing_docs)]
+pub const R_SPARC_TLS_IE_LD: u32 = 69;
+#[allow(missing_docs)]
+pub const R_SPARC_TLS_IE_LDX: u32 = 70;
+#[allow(missing_docs)]
+pub const R_SPARC_TLS_IE_ADD: u32 = 71;
+#[allow(missing_docs)]
+pub const R_SPARC_TLS_LE_HIX22: u32 = 72;
+#[allow(missing_docs)]
+pub const R_SPARC_TLS_LE_LOX10: u32 = 73;
+#[allow(missing_docs)]
+pub const R_SPARC_TLS_DTPMOD32: u32 = 74;
+#[allow(missing_docs)]
+pub const R_SPARC_TLS_DTPMOD64: u32 = 75;
+#[allow(missing_docs)]
+pub const R_SPARC_TLS_DTPOFF32: u32 = 76;
+#[allow(missing_docs)]
+pub const R_SPARC_TLS_DTPOFF64: u32 = 77;
+#[allow(missing_docs)]
+pub const R_SPARC_TLS_TPOFF32: u32 = 78;
+#[allow(missing_docs)]
+pub const R_SPARC_TLS_TPOFF64: u32 = 79;
+#[allow(missing_docs)]
+pub const R_SPARC_GOTDATA_HIX22: u32 = 80;
+#[allow(missing_docs)]
+pub const R_SPARC_GOTDATA_LOX10: u32 = 81;
+#[allow(missing_docs)]
+pub const R_SPARC_GOTDATA_OP_HIX22: u32 = 82;
+#[allow(missing_docs)]
+pub const R_SPARC_GOTDATA_OP_LOX10: u32 = 83;
+#[allow(missing_docs)]
+pub const R_SPARC_GOTDATA_OP: u32 = 84;
+#[allow(missing_docs)]
+pub const R_SPARC_H34: u32 = 85;
+#[allow(missing_docs)]
+pub const R_SPARC_SIZE32: u32 = 86;
+#[allow(missing_docs)]
+pub const R_SPARC_SIZE64: u32 = 87;
+#[allow(missing_docs)]
+pub const R_SPARC_WDISP10: u32 = 88;
+#[allow(missing_docs)]
+pub const R_SPARC_JMP_IREL: u32 = 248;
+#[allow(missing_docs)]
+pub const R_SPARC_IRELATIVE: u32 = 249;
+#[allow(missing_docs)]
+pub const R_SPARC_GNU_VTINHERIT: u32 = 250;
+#[allow(missing_docs)]
+pub const R_SPARC_GNU_VTENTRY: u32 = 251;
+#[allow(missing_docs)]
+pub const R_SPARC_REV32: u32 = 252;
+
+// Sparc64 values for `Dyn32::d_tag`.
+
+#[allow(missing_docs)]
+pub const DT_SPARC_REGISTER: u32 = 0x7000_0001;
+
+// MIPS R3000 specific definitions.
+
+// MIPS values for `FileHeader32::e_flags`.
+
+/// A .noreorder directive was used.
+pub const EF_MIPS_NOREORDER: u32 = 1;
+/// Contains PIC code.
+pub const EF_MIPS_PIC: u32 = 2;
+/// Uses PIC calling sequence.
+pub const EF_MIPS_CPIC: u32 = 4;
+#[allow(missing_docs)]
+pub const EF_MIPS_XGOT: u32 = 8;
+#[allow(missing_docs)]
+pub const EF_MIPS_64BIT_WHIRL: u32 = 16;
+#[allow(missing_docs)]
+pub const EF_MIPS_ABI2: u32 = 32;
+#[allow(missing_docs)]
+pub const EF_MIPS_ABI_ON32: u32 = 64;
+/// Uses FP64 (12 callee-saved).
+pub const EF_MIPS_FP64: u32 = 512;
+/// Uses IEEE 754-2008 NaN encoding.
+pub const EF_MIPS_NAN2008: u32 = 1024;
+/// MIPS architecture level.
+pub const EF_MIPS_ARCH: u32 = 0xf000_0000;
+
+/// The first MIPS 32 bit ABI
+pub const EF_MIPS_ABI_O32: u32 = 0x0000_1000;
+/// O32 ABI extended for 64-bit architectures
+pub const EF_MIPS_ABI_O64: u32 = 0x0000_2000;
+/// EABI in 32-bit mode
+pub const EF_MIPS_ABI_EABI32: u32 = 0x0000_3000;
+/// EABI in 64-bit mode
+pub const EF_MIPS_ABI_EABI64: u32 = 0x0000_4000;
+/// Mask for selecting EF_MIPS_ABI_ variant
+pub const EF_MIPS_ABI: u32 = 0x0000_f000;
+
+// Legal values for MIPS architecture level.
+
+/// -mips1 code.
+pub const EF_MIPS_ARCH_1: u32 = 0x0000_0000;
+/// -mips2 code.
+pub const EF_MIPS_ARCH_2: u32 = 0x1000_0000;
+/// -mips3 code.
+pub const EF_MIPS_ARCH_3: u32 = 0x2000_0000;
+/// -mips4 code.
+pub const EF_MIPS_ARCH_4: u32 = 0x3000_0000;
+/// -mips5 code.
+pub const EF_MIPS_ARCH_5: u32 = 0x4000_0000;
+/// MIPS32 code.
+pub const EF_MIPS_ARCH_32: u32 = 0x5000_0000;
+/// MIPS64 code.
+pub const EF_MIPS_ARCH_64: u32 = 0x6000_0000;
+/// MIPS32r2 code.
+pub const EF_MIPS_ARCH_32R2: u32 = 0x7000_0000;
+/// MIPS64r2 code.
+pub const EF_MIPS_ARCH_64R2: u32 = 0x8000_0000;
+/// MIPS32r6 code
+pub const EF_MIPS_ARCH_32R6: u32 = 0x9000_0000;
+/// MIPS64r6 code
+pub const EF_MIPS_ARCH_64R6: u32 = 0xa000_0000;
+
+// MIPS values for `Sym32::st_shndx`.
+
+/// Allocated common symbols.
+pub const SHN_MIPS_ACOMMON: u16 = 0xff00;
+/// Allocated test symbols.
+pub const SHN_MIPS_TEXT: u16 = 0xff01;
+/// Allocated data symbols.
+pub const SHN_MIPS_DATA: u16 = 0xff02;
+/// Small common symbols.
+pub const SHN_MIPS_SCOMMON: u16 = 0xff03;
+/// Small undefined symbols.
+pub const SHN_MIPS_SUNDEFINED: u16 = 0xff04;
+
+// MIPS values for `SectionHeader32::sh_type`.
+
+/// Shared objects used in link.
+pub const SHT_MIPS_LIBLIST: u32 = 0x7000_0000;
+#[allow(missing_docs)]
+pub const SHT_MIPS_MSYM: u32 = 0x7000_0001;
+/// Conflicting symbols.
+pub const SHT_MIPS_CONFLICT: u32 = 0x7000_0002;
+/// Global data area sizes.
+pub const SHT_MIPS_GPTAB: u32 = 0x7000_0003;
+/// Reserved for SGI/MIPS compilers
+pub const SHT_MIPS_UCODE: u32 = 0x7000_0004;
+/// MIPS ECOFF debugging info.
+pub const SHT_MIPS_DEBUG: u32 = 0x7000_0005;
+/// Register usage information.
+pub const SHT_MIPS_REGINFO: u32 = 0x7000_0006;
+#[allow(missing_docs)]
+pub const SHT_MIPS_PACKAGE: u32 = 0x7000_0007;
+#[allow(missing_docs)]
+pub const SHT_MIPS_PACKSYM: u32 = 0x7000_0008;
+#[allow(missing_docs)]
+pub const SHT_MIPS_RELD: u32 = 0x7000_0009;
+#[allow(missing_docs)]
+pub const SHT_MIPS_IFACE: u32 = 0x7000_000b;
+#[allow(missing_docs)]
+pub const SHT_MIPS_CONTENT: u32 = 0x7000_000c;
+/// Miscellaneous options.
+pub const SHT_MIPS_OPTIONS: u32 = 0x7000_000d;
+#[allow(missing_docs)]
+pub const SHT_MIPS_SHDR: u32 = 0x7000_0010;
+#[allow(missing_docs)]
+pub const SHT_MIPS_FDESC: u32 = 0x7000_0011;
+#[allow(missing_docs)]
+pub const SHT_MIPS_EXTSYM: u32 = 0x7000_0012;
+#[allow(missing_docs)]
+pub const SHT_MIPS_DENSE: u32 = 0x7000_0013;
+#[allow(missing_docs)]
+pub const SHT_MIPS_PDESC: u32 = 0x7000_0014;
+#[allow(missing_docs)]
+pub const SHT_MIPS_LOCSYM: u32 = 0x7000_0015;
+#[allow(missing_docs)]
+pub const SHT_MIPS_AUXSYM: u32 = 0x7000_0016;
+#[allow(missing_docs)]
+pub const SHT_MIPS_OPTSYM: u32 = 0x7000_0017;
+#[allow(missing_docs)]
+pub const SHT_MIPS_LOCSTR: u32 = 0x7000_0018;
+#[allow(missing_docs)]
+pub const SHT_MIPS_LINE: u32 = 0x7000_0019;
+#[allow(missing_docs)]
+pub const SHT_MIPS_RFDESC: u32 = 0x7000_001a;
+#[allow(missing_docs)]
+pub const SHT_MIPS_DELTASYM: u32 = 0x7000_001b;
+#[allow(missing_docs)]
+pub const SHT_MIPS_DELTAINST: u32 = 0x7000_001c;
+#[allow(missing_docs)]
+pub const SHT_MIPS_DELTACLASS: u32 = 0x7000_001d;
+/// DWARF debugging information.
+pub const SHT_MIPS_DWARF: u32 = 0x7000_001e;
+#[allow(missing_docs)]
+pub const SHT_MIPS_DELTADECL: u32 = 0x7000_001f;
+#[allow(missing_docs)]
+pub const SHT_MIPS_SYMBOL_LIB: u32 = 0x7000_0020;
+/// Event section.
+pub const SHT_MIPS_EVENTS: u32 = 0x7000_0021;
+#[allow(missing_docs)]
+pub const SHT_MIPS_TRANSLATE: u32 = 0x7000_0022;
+#[allow(missing_docs)]
+pub const SHT_MIPS_PIXIE: u32 = 0x7000_0023;
+#[allow(missing_docs)]
+pub const SHT_MIPS_XLATE: u32 = 0x7000_0024;
+#[allow(missing_docs)]
+pub const SHT_MIPS_XLATE_DEBUG: u32 = 0x7000_0025;
+#[allow(missing_docs)]
+pub const SHT_MIPS_WHIRL: u32 = 0x7000_0026;
+#[allow(missing_docs)]
+pub const SHT_MIPS_EH_REGION: u32 = 0x7000_0027;
+#[allow(missing_docs)]
+pub const SHT_MIPS_XLATE_OLD: u32 = 0x7000_0028;
+#[allow(missing_docs)]
+pub const SHT_MIPS_PDR_EXCEPTION: u32 = 0x7000_0029;
+
+// MIPS values for `SectionHeader32::sh_flags`.
+
+/// Must be in global data area.
+pub const SHF_MIPS_GPREL: u32 = 0x1000_0000;
+#[allow(missing_docs)]
+pub const SHF_MIPS_MERGE: u32 = 0x2000_0000;
+#[allow(missing_docs)]
+pub const SHF_MIPS_ADDR: u32 = 0x4000_0000;
+#[allow(missing_docs)]
+pub const SHF_MIPS_STRINGS: u32 = 0x8000_0000;
+#[allow(missing_docs)]
+pub const SHF_MIPS_NOSTRIP: u32 = 0x0800_0000;
+#[allow(missing_docs)]
+pub const SHF_MIPS_LOCAL: u32 = 0x0400_0000;
+#[allow(missing_docs)]
+pub const SHF_MIPS_NAMES: u32 = 0x0200_0000;
+#[allow(missing_docs)]
+pub const SHF_MIPS_NODUPE: u32 = 0x0100_0000;
+
+// MIPS values for `Sym32::st_other`.
+
+#[allow(missing_docs)]
+pub const STO_MIPS_PLT: u8 = 0x8;
+/// Only valid for `STB_MIPS_SPLIT_COMMON`.
+pub const STO_MIPS_SC_ALIGN_UNUSED: u8 = 0xff;
+
+// MIPS values for `Sym32::st_info'.
+#[allow(missing_docs)]
+pub const STB_MIPS_SPLIT_COMMON: u8 = 13;
+
+// Entries found in sections of type `SHT_MIPS_GPTAB`.
+
+// TODO: Elf32_gptab, Elf32_RegInfo, Elf_Options
+
+// Values for `Elf_Options::kind`.
+
+/// Undefined.
+pub const ODK_NULL: u32 = 0;
+/// Register usage information.
+pub const ODK_REGINFO: u32 = 1;
+/// Exception processing options.
+pub const ODK_EXCEPTIONS: u32 = 2;
+/// Section padding options.
+pub const ODK_PAD: u32 = 3;
+/// Hardware workarounds performed
+pub const ODK_HWPATCH: u32 = 4;
+/// record the fill value used by the linker.
+pub const ODK_FILL: u32 = 5;
+/// reserve space for desktop tools to write.
+pub const ODK_TAGS: u32 = 6;
+/// HW workarounds.  'AND' bits when merging.
+pub const ODK_HWAND: u32 = 7;
+/// HW workarounds.  'OR' bits when merging.
+pub const ODK_HWOR: u32 = 8;
+
+// Values for `Elf_Options::info` for `ODK_EXCEPTIONS` entries.
+
+/// FPE's which MUST be enabled.
+pub const OEX_FPU_MIN: u32 = 0x1f;
+/// FPE's which MAY be enabled.
+pub const OEX_FPU_MAX: u32 = 0x1f00;
+/// page zero must be mapped.
+pub const OEX_PAGE0: u32 = 0x10000;
+/// Force sequential memory mode?
+pub const OEX_SMM: u32 = 0x20000;
+/// Force floating point debug mode?
+pub const OEX_FPDBUG: u32 = 0x40000;
+#[allow(missing_docs)]
+pub const OEX_PRECISEFP: u32 = OEX_FPDBUG;
+/// Dismiss invalid address faults?
+pub const OEX_DISMISS: u32 = 0x80000;
+
+#[allow(missing_docs)]
+pub const OEX_FPU_INVAL: u32 = 0x10;
+#[allow(missing_docs)]
+pub const OEX_FPU_DIV0: u32 = 0x08;
+#[allow(missing_docs)]
+pub const OEX_FPU_OFLO: u32 = 0x04;
+#[allow(missing_docs)]
+pub const OEX_FPU_UFLO: u32 = 0x02;
+#[allow(missing_docs)]
+pub const OEX_FPU_INEX: u32 = 0x01;
+
+// Masks for `Elf_Options::info` for an `ODK_HWPATCH` entry.  */
+/// R4000 end-of-page patch.
+pub const OHW_R4KEOP: u32 = 0x1;
+/// may need R8000 prefetch patch.
+pub const OHW_R8KPFETCH: u32 = 0x2;
+/// R5000 end-of-page patch.
+pub const OHW_R5KEOP: u32 = 0x4;
+/// R5000 cvt.\[ds\].l bug.  clean=1.
+pub const OHW_R5KCVTL: u32 = 0x8;
+
+#[allow(missing_docs)]
+pub const OPAD_PREFIX: u32 = 0x1;
+#[allow(missing_docs)]
+pub const OPAD_POSTFIX: u32 = 0x2;
+#[allow(missing_docs)]
+pub const OPAD_SYMBOL: u32 = 0x4;
+
+// Entries found in sections of type `SHT_MIPS_OPTIONS`.
+
+// TODO: Elf_Options_Hw
+
+// Masks for `ElfOptions::info` for `ODK_HWAND` and `ODK_HWOR` entries.
+
+#[allow(missing_docs)]
+pub const OHWA0_R4KEOP_CHECKED: u32 = 0x0000_0001;
+#[allow(missing_docs)]
+pub const OHWA1_R4KEOP_CLEAN: u32 = 0x0000_0002;
+
+// MIPS values for `Rel*::r_type`.
+
+/// No reloc
+pub const R_MIPS_NONE: u32 = 0;
+/// Direct 16 bit
+pub const R_MIPS_16: u32 = 1;
+/// Direct 32 bit
+pub const R_MIPS_32: u32 = 2;
+/// PC relative 32 bit
+pub const R_MIPS_REL32: u32 = 3;
+/// Direct 26 bit shifted
+pub const R_MIPS_26: u32 = 4;
+/// High 16 bit
+pub const R_MIPS_HI16: u32 = 5;
+/// Low 16 bit
+pub const R_MIPS_LO16: u32 = 6;
+/// GP relative 16 bit
+pub const R_MIPS_GPREL16: u32 = 7;
+/// 16 bit literal entry
+pub const R_MIPS_LITERAL: u32 = 8;
+/// 16 bit GOT entry
+pub const R_MIPS_GOT16: u32 = 9;
+/// PC relative 16 bit
+pub const R_MIPS_PC16: u32 = 10;
+/// 16 bit GOT entry for function
+pub const R_MIPS_CALL16: u32 = 11;
+/// GP relative 32 bit
+pub const R_MIPS_GPREL32: u32 = 12;
+
+#[allow(missing_docs)]
+pub const R_MIPS_SHIFT5: u32 = 16;
+#[allow(missing_docs)]
+pub const R_MIPS_SHIFT6: u32 = 17;
+#[allow(missing_docs)]
+pub const R_MIPS_64: u32 = 18;
+#[allow(missing_docs)]
+pub const R_MIPS_GOT_DISP: u32 = 19;
+#[allow(missing_docs)]
+pub const R_MIPS_GOT_PAGE: u32 = 20;
+#[allow(missing_docs)]
+pub const R_MIPS_GOT_OFST: u32 = 21;
+#[allow(missing_docs)]
+pub const R_MIPS_GOT_HI16: u32 = 22;
+#[allow(missing_docs)]
+pub const R_MIPS_GOT_LO16: u32 = 23;
+#[allow(missing_docs)]
+pub const R_MIPS_SUB: u32 = 24;
+#[allow(missing_docs)]
+pub const R_MIPS_INSERT_A: u32 = 25;
+#[allow(missing_docs)]
+pub const R_MIPS_INSERT_B: u32 = 26;
+#[allow(missing_docs)]
+pub const R_MIPS_DELETE: u32 = 27;
+#[allow(missing_docs)]
+pub const R_MIPS_HIGHER: u32 = 28;
+#[allow(missing_docs)]
+pub const R_MIPS_HIGHEST: u32 = 29;
+#[allow(missing_docs)]
+pub const R_MIPS_CALL_HI16: u32 = 30;
+#[allow(missing_docs)]
+pub const R_MIPS_CALL_LO16: u32 = 31;
+#[allow(missing_docs)]
+pub const R_MIPS_SCN_DISP: u32 = 32;
+#[allow(missing_docs)]
+pub const R_MIPS_REL16: u32 = 33;
+#[allow(missing_docs)]
+pub const R_MIPS_ADD_IMMEDIATE: u32 = 34;
+#[allow(missing_docs)]
+pub const R_MIPS_PJUMP: u32 = 35;
+#[allow(missing_docs)]
+pub const R_MIPS_RELGOT: u32 = 36;
+#[allow(missing_docs)]
+pub const R_MIPS_JALR: u32 = 37;
+/// Module number 32 bit
+pub const R_MIPS_TLS_DTPMOD32: u32 = 38;
+/// Module-relative offset 32 bit
+pub const R_MIPS_TLS_DTPREL32: u32 = 39;
+/// Module number 64 bit
+pub const R_MIPS_TLS_DTPMOD64: u32 = 40;
+/// Module-relative offset 64 bit
+pub const R_MIPS_TLS_DTPREL64: u32 = 41;
+/// 16 bit GOT offset for GD
+pub const R_MIPS_TLS_GD: u32 = 42;
+/// 16 bit GOT offset for LDM
+pub const R_MIPS_TLS_LDM: u32 = 43;
+/// Module-relative offset, high 16 bits
+pub const R_MIPS_TLS_DTPREL_HI16: u32 = 44;
+/// Module-relative offset, low 16 bits
+pub const R_MIPS_TLS_DTPREL_LO16: u32 = 45;
+/// 16 bit GOT offset for IE
+pub const R_MIPS_TLS_GOTTPREL: u32 = 46;
+/// TP-relative offset, 32 bit
+pub const R_MIPS_TLS_TPREL32: u32 = 47;
+/// TP-relative offset, 64 bit
+pub const R_MIPS_TLS_TPREL64: u32 = 48;
+/// TP-relative offset, high 16 bits
+pub const R_MIPS_TLS_TPREL_HI16: u32 = 49;
+/// TP-relative offset, low 16 bits
+pub const R_MIPS_TLS_TPREL_LO16: u32 = 50;
+#[allow(missing_docs)]
+pub const R_MIPS_GLOB_DAT: u32 = 51;
+#[allow(missing_docs)]
+pub const R_MIPS_COPY: u32 = 126;
+#[allow(missing_docs)]
+pub const R_MIPS_JUMP_SLOT: u32 = 127;
+
+// MIPS values for `ProgramHeader32::p_type`.
+
+/// Register usage information.
+pub const PT_MIPS_REGINFO: u32 = 0x7000_0000;
+/// Runtime procedure table.
+pub const PT_MIPS_RTPROC: u32 = 0x7000_0001;
+#[allow(missing_docs)]
+pub const PT_MIPS_OPTIONS: u32 = 0x7000_0002;
+/// FP mode requirement.
+pub const PT_MIPS_ABIFLAGS: u32 = 0x7000_0003;
+
+// MIPS values for `ProgramHeader32::p_flags`.
+
+#[allow(missing_docs)]
+pub const PF_MIPS_LOCAL: u32 = 0x1000_0000;
+
+// MIPS values for `Dyn32::d_tag`.
+
+/// Runtime linker interface version
+pub const DT_MIPS_RLD_VERSION: u32 = 0x7000_0001;
+/// Timestamp
+pub const DT_MIPS_TIME_STAMP: u32 = 0x7000_0002;
+/// Checksum
+pub const DT_MIPS_ICHECKSUM: u32 = 0x7000_0003;
+/// Version string (string tbl index)
+pub const DT_MIPS_IVERSION: u32 = 0x7000_0004;
+/// Flags
+pub const DT_MIPS_FLAGS: u32 = 0x7000_0005;
+/// Base address
+pub const DT_MIPS_BASE_ADDRESS: u32 = 0x7000_0006;
+#[allow(missing_docs)]
+pub const DT_MIPS_MSYM: u32 = 0x7000_0007;
+/// Address of CONFLICT section
+pub const DT_MIPS_CONFLICT: u32 = 0x7000_0008;
+/// Address of LIBLIST section
+pub const DT_MIPS_LIBLIST: u32 = 0x7000_0009;
+/// Number of local GOT entries
+pub const DT_MIPS_LOCAL_GOTNO: u32 = 0x7000_000a;
+/// Number of CONFLICT entries
+pub const DT_MIPS_CONFLICTNO: u32 = 0x7000_000b;
+/// Number of LIBLIST entries
+pub const DT_MIPS_LIBLISTNO: u32 = 0x7000_0010;
+/// Number of DYNSYM entries
+pub const DT_MIPS_SYMTABNO: u32 = 0x7000_0011;
+/// First external DYNSYM
+pub const DT_MIPS_UNREFEXTNO: u32 = 0x7000_0012;
+/// First GOT entry in DYNSYM
+pub const DT_MIPS_GOTSYM: u32 = 0x7000_0013;
+/// Number of GOT page table entries
+pub const DT_MIPS_HIPAGENO: u32 = 0x7000_0014;
+/// Address of run time loader map.
+pub const DT_MIPS_RLD_MAP: u32 = 0x7000_0016;
+/// Delta C++ class definition.
+pub const DT_MIPS_DELTA_CLASS: u32 = 0x7000_0017;
+/// Number of entries in DT_MIPS_DELTA_CLASS.
+pub const DT_MIPS_DELTA_CLASS_NO: u32 = 0x7000_0018;
+/// Delta C++ class instances.
+pub const DT_MIPS_DELTA_INSTANCE: u32 = 0x7000_0019;
+/// Number of entries in DT_MIPS_DELTA_INSTANCE.
+pub const DT_MIPS_DELTA_INSTANCE_NO: u32 = 0x7000_001a;
+/// Delta relocations.
+pub const DT_MIPS_DELTA_RELOC: u32 = 0x7000_001b;
+/// Number of entries in DT_MIPS_DELTA_RELOC.
+pub const DT_MIPS_DELTA_RELOC_NO: u32 = 0x7000_001c;
+/// Delta symbols that Delta relocations refer to.
+pub const DT_MIPS_DELTA_SYM: u32 = 0x7000_001d;
+/// Number of entries in DT_MIPS_DELTA_SYM.
+pub const DT_MIPS_DELTA_SYM_NO: u32 = 0x7000_001e;
+/// Delta symbols that hold the class declaration.
+pub const DT_MIPS_DELTA_CLASSSYM: u32 = 0x7000_0020;
+/// Number of entries in DT_MIPS_DELTA_CLASSSYM.
+pub const DT_MIPS_DELTA_CLASSSYM_NO: u32 = 0x7000_0021;
+/// Flags indicating for C++ flavor.
+pub const DT_MIPS_CXX_FLAGS: u32 = 0x7000_0022;
+#[allow(missing_docs)]
+pub const DT_MIPS_PIXIE_INIT: u32 = 0x7000_0023;
+#[allow(missing_docs)]
+pub const DT_MIPS_SYMBOL_LIB: u32 = 0x7000_0024;
+#[allow(missing_docs)]
+pub const DT_MIPS_LOCALPAGE_GOTIDX: u32 = 0x7000_0025;
+#[allow(missing_docs)]
+pub const DT_MIPS_LOCAL_GOTIDX: u32 = 0x7000_0026;
+#[allow(missing_docs)]
+pub const DT_MIPS_HIDDEN_GOTIDX: u32 = 0x7000_0027;
+#[allow(missing_docs)]
+pub const DT_MIPS_PROTECTED_GOTIDX: u32 = 0x7000_0028;
+/// Address of .options.
+pub const DT_MIPS_OPTIONS: u32 = 0x7000_0029;
+/// Address of .interface.
+pub const DT_MIPS_INTERFACE: u32 = 0x7000_002a;
+#[allow(missing_docs)]
+pub const DT_MIPS_DYNSTR_ALIGN: u32 = 0x7000_002b;
+/// Size of the .interface section.
+pub const DT_MIPS_INTERFACE_SIZE: u32 = 0x7000_002c;
+/// Address of rld_text_rsolve function stored in GOT.
+pub const DT_MIPS_RLD_TEXT_RESOLVE_ADDR: u32 = 0x7000_002d;
+/// Default suffix of dso to be added by rld on dlopen() calls.
+pub const DT_MIPS_PERF_SUFFIX: u32 = 0x7000_002e;
+/// (O32)Size of compact rel section.
+pub const DT_MIPS_COMPACT_SIZE: u32 = 0x7000_002f;
+/// GP value for aux GOTs.
+pub const DT_MIPS_GP_VALUE: u32 = 0x7000_0030;
+/// Address of aux .dynamic.
+pub const DT_MIPS_AUX_DYNAMIC: u32 = 0x7000_0031;
+/// The address of .got.plt in an executable using the new non-PIC ABI.
+pub const DT_MIPS_PLTGOT: u32 = 0x7000_0032;
+/// The base of the PLT in an executable using the new non-PIC ABI if that PLT is writable.  For a non-writable PLT, this is omitted or has a zero value.
+pub const DT_MIPS_RWPLT: u32 = 0x7000_0034;
+/// An alternative description of the classic MIPS RLD_MAP that is usable in a PIE as it stores a relative offset from the address of the tag rather than an absolute address.
+pub const DT_MIPS_RLD_MAP_REL: u32 = 0x7000_0035;
+
+// Values for `DT_MIPS_FLAGS` `Dyn32` entry.
+
+/// No flags
+pub const RHF_NONE: u32 = 0;
+/// Use quickstart
+pub const RHF_QUICKSTART: u32 = 1 << 0;
+/// Hash size not power of 2
+pub const RHF_NOTPOT: u32 = 1 << 1;
+/// Ignore LD_LIBRARY_PATH
+pub const RHF_NO_LIBRARY_REPLACEMENT: u32 = 1 << 2;
+#[allow(missing_docs)]
+pub const RHF_NO_MOVE: u32 = 1 << 3;
+#[allow(missing_docs)]
+pub const RHF_SGI_ONLY: u32 = 1 << 4;
+#[allow(missing_docs)]
+pub const RHF_GUARANTEE_INIT: u32 = 1 << 5;
+#[allow(missing_docs)]
+pub const RHF_DELTA_C_PLUS_PLUS: u32 = 1 << 6;
+#[allow(missing_docs)]
+pub const RHF_GUARANTEE_START_INIT: u32 = 1 << 7;
+#[allow(missing_docs)]
+pub const RHF_PIXIE: u32 = 1 << 8;
+#[allow(missing_docs)]
+pub const RHF_DEFAULT_DELAY_LOAD: u32 = 1 << 9;
+#[allow(missing_docs)]
+pub const RHF_REQUICKSTART: u32 = 1 << 10;
+#[allow(missing_docs)]
+pub const RHF_REQUICKSTARTED: u32 = 1 << 11;
+#[allow(missing_docs)]
+pub const RHF_CORD: u32 = 1 << 12;
+#[allow(missing_docs)]
+pub const RHF_NO_UNRES_UNDEF: u32 = 1 << 13;
+#[allow(missing_docs)]
+pub const RHF_RLD_ORDER_SAFE: u32 = 1 << 14;
+
+// Entries found in sections of type `SHT_MIPS_LIBLIST`.
+
+// TODO: Elf32_Lib, Elf64_Lib
+
+// Values for `Lib*::l_flags`.
+
+#[allow(missing_docs)]
+pub const LL_NONE: u32 = 0;
+/// Require exact match
+pub const LL_EXACT_MATCH: u32 = 1 << 0;
+/// Ignore interface version
+pub const LL_IGNORE_INT_VER: u32 = 1 << 1;
+#[allow(missing_docs)]
+pub const LL_REQUIRE_MINOR: u32 = 1 << 2;
+#[allow(missing_docs)]
+pub const LL_EXPORTS: u32 = 1 << 3;
+#[allow(missing_docs)]
+pub const LL_DELAY_LOAD: u32 = 1 << 4;
+#[allow(missing_docs)]
+pub const LL_DELTA: u32 = 1 << 5;
+
+// TODO: MIPS ABI flags
+
+// PA-RISC specific definitions.
+
+// PA-RISC values for `FileHeader32::e_flags`.
+
+/// Trap nil pointer dereference.
+pub const EF_PARISC_TRAPNIL: u32 = 0x0001_0000;
+/// Program uses arch. extensions.
+pub const EF_PARISC_EXT: u32 = 0x0002_0000;
+/// Program expects little endian.
+pub const EF_PARISC_LSB: u32 = 0x0004_0000;
+/// Program expects wide mode.
+pub const EF_PARISC_WIDE: u32 = 0x0008_0000;
+/// No kernel assisted branch prediction.
+pub const EF_PARISC_NO_KABP: u32 = 0x0010_0000;
+/// Allow lazy swapping.
+pub const EF_PARISC_LAZYSWAP: u32 = 0x0040_0000;
+/// Architecture version.
+pub const EF_PARISC_ARCH: u32 = 0x0000_ffff;
+
+// Values for `EF_PARISC_ARCH'.
+
+/// PA-RISC 1.0 big-endian.
+pub const EFA_PARISC_1_0: u32 = 0x020b;
+/// PA-RISC 1.1 big-endian.
+pub const EFA_PARISC_1_1: u32 = 0x0210;
+/// PA-RISC 2.0 big-endian.
+pub const EFA_PARISC_2_0: u32 = 0x0214;
+
+// PA-RISC values for `Sym*::st_shndx`.
+
+/// Section for tenatively declared symbols in ANSI C.
+pub const SHN_PARISC_ANSI_COMMON: u16 = 0xff00;
+/// Common blocks in huge model.
+pub const SHN_PARISC_HUGE_COMMON: u16 = 0xff01;
+
+// PA-RISC values for `SectionHeader32::sh_type`.
+
+/// Contains product specific ext.
+pub const SHT_PARISC_EXT: u32 = 0x7000_0000;
+/// Unwind information.
+pub const SHT_PARISC_UNWIND: u32 = 0x7000_0001;
+/// Debug info for optimized code.
+pub const SHT_PARISC_DOC: u32 = 0x7000_0002;
+
+// PA-RISC values for `SectionHeader32::sh_flags`.
+
+/// Section with short addressing.
+pub const SHF_PARISC_SHORT: u32 = 0x2000_0000;
+/// Section far from gp.
+pub const SHF_PARISC_HUGE: u32 = 0x4000_0000;
+/// Static branch prediction code.
+pub const SHF_PARISC_SBP: u32 = 0x8000_0000;
+
+// PA-RISC values for `st_type` component of `Sym32::st_info`.
+
+/// Millicode function entry point.
+pub const STT_PARISC_MILLICODE: u8 = 13;
+
+#[allow(missing_docs)]
+pub const STT_HP_OPAQUE: u8 = STT_LOOS + 0x1;
+#[allow(missing_docs)]
+pub const STT_HP_STUB: u8 = STT_LOOS + 0x2;
+
+// PA-RISC values for `Rel*::r_type`.
+
+/// No reloc.
+pub const R_PARISC_NONE: u32 = 0;
+/// Direct 32-bit reference.
+pub const R_PARISC_DIR32: u32 = 1;
+/// Left 21 bits of eff. address.
+pub const R_PARISC_DIR21L: u32 = 2;
+/// Right 17 bits of eff. address.
+pub const R_PARISC_DIR17R: u32 = 3;
+/// 17 bits of eff. address.
+pub const R_PARISC_DIR17F: u32 = 4;
+/// Right 14 bits of eff. address.
+pub const R_PARISC_DIR14R: u32 = 6;
+/// 32-bit rel. address.
+pub const R_PARISC_PCREL32: u32 = 9;
+/// Left 21 bits of rel. address.
+pub const R_PARISC_PCREL21L: u32 = 10;
+/// Right 17 bits of rel. address.
+pub const R_PARISC_PCREL17R: u32 = 11;
+/// 17 bits of rel. address.
+pub const R_PARISC_PCREL17F: u32 = 12;
+/// Right 14 bits of rel. address.
+pub const R_PARISC_PCREL14R: u32 = 14;
+/// Left 21 bits of rel. address.
+pub const R_PARISC_DPREL21L: u32 = 18;
+/// Right 14 bits of rel. address.
+pub const R_PARISC_DPREL14R: u32 = 22;
+/// GP-relative, left 21 bits.
+pub const R_PARISC_GPREL21L: u32 = 26;
+/// GP-relative, right 14 bits.
+pub const R_PARISC_GPREL14R: u32 = 30;
+/// LT-relative, left 21 bits.
+pub const R_PARISC_LTOFF21L: u32 = 34;
+/// LT-relative, right 14 bits.
+pub const R_PARISC_LTOFF14R: u32 = 38;
+/// 32 bits section rel. address.
+pub const R_PARISC_SECREL32: u32 = 41;
+/// No relocation, set segment base.
+pub const R_PARISC_SEGBASE: u32 = 48;
+/// 32 bits segment rel. address.
+pub const R_PARISC_SEGREL32: u32 = 49;
+/// PLT rel. address, left 21 bits.
+pub const R_PARISC_PLTOFF21L: u32 = 50;
+/// PLT rel. address, right 14 bits.
+pub const R_PARISC_PLTOFF14R: u32 = 54;
+/// 32 bits LT-rel. function pointer.
+pub const R_PARISC_LTOFF_FPTR32: u32 = 57;
+/// LT-rel. fct ptr, left 21 bits.
+pub const R_PARISC_LTOFF_FPTR21L: u32 = 58;
+/// LT-rel. fct ptr, right 14 bits.
+pub const R_PARISC_LTOFF_FPTR14R: u32 = 62;
+/// 64 bits function address.
+pub const R_PARISC_FPTR64: u32 = 64;
+/// 32 bits function address.
+pub const R_PARISC_PLABEL32: u32 = 65;
+/// Left 21 bits of fdesc address.
+pub const R_PARISC_PLABEL21L: u32 = 66;
+/// Right 14 bits of fdesc address.
+pub const R_PARISC_PLABEL14R: u32 = 70;
+/// 64 bits PC-rel. address.
+pub const R_PARISC_PCREL64: u32 = 72;
+/// 22 bits PC-rel. address.
+pub const R_PARISC_PCREL22F: u32 = 74;
+/// PC-rel. address, right 14 bits.
+pub const R_PARISC_PCREL14WR: u32 = 75;
+/// PC rel. address, right 14 bits.
+pub const R_PARISC_PCREL14DR: u32 = 76;
+/// 16 bits PC-rel. address.
+pub const R_PARISC_PCREL16F: u32 = 77;
+/// 16 bits PC-rel. address.
+pub const R_PARISC_PCREL16WF: u32 = 78;
+/// 16 bits PC-rel. address.
+pub const R_PARISC_PCREL16DF: u32 = 79;
+/// 64 bits of eff. address.
+pub const R_PARISC_DIR64: u32 = 80;
+/// 14 bits of eff. address.
+pub const R_PARISC_DIR14WR: u32 = 83;
+/// 14 bits of eff. address.
+pub const R_PARISC_DIR14DR: u32 = 84;
+/// 16 bits of eff. address.
+pub const R_PARISC_DIR16F: u32 = 85;
+/// 16 bits of eff. address.
+pub const R_PARISC_DIR16WF: u32 = 86;
+/// 16 bits of eff. address.
+pub const R_PARISC_DIR16DF: u32 = 87;
+/// 64 bits of GP-rel. address.
+pub const R_PARISC_GPREL64: u32 = 88;
+/// GP-rel. address, right 14 bits.
+pub const R_PARISC_GPREL14WR: u32 = 91;
+/// GP-rel. address, right 14 bits.
+pub const R_PARISC_GPREL14DR: u32 = 92;
+/// 16 bits GP-rel. address.
+pub const R_PARISC_GPREL16F: u32 = 93;
+/// 16 bits GP-rel. address.
+pub const R_PARISC_GPREL16WF: u32 = 94;
+/// 16 bits GP-rel. address.
+pub const R_PARISC_GPREL16DF: u32 = 95;
+/// 64 bits LT-rel. address.
+pub const R_PARISC_LTOFF64: u32 = 96;
+/// LT-rel. address, right 14 bits.
+pub const R_PARISC_LTOFF14WR: u32 = 99;
+/// LT-rel. address, right 14 bits.
+pub const R_PARISC_LTOFF14DR: u32 = 100;
+/// 16 bits LT-rel. address.
+pub const R_PARISC_LTOFF16F: u32 = 101;
+/// 16 bits LT-rel. address.
+pub const R_PARISC_LTOFF16WF: u32 = 102;
+/// 16 bits LT-rel. address.
+pub const R_PARISC_LTOFF16DF: u32 = 103;
+/// 64 bits section rel. address.
+pub const R_PARISC_SECREL64: u32 = 104;
+/// 64 bits segment rel. address.
+pub const R_PARISC_SEGREL64: u32 = 112;
+/// PLT-rel. address, right 14 bits.
+pub const R_PARISC_PLTOFF14WR: u32 = 115;
+/// PLT-rel. address, right 14 bits.
+pub const R_PARISC_PLTOFF14DR: u32 = 116;
+/// 16 bits LT-rel. address.
+pub const R_PARISC_PLTOFF16F: u32 = 117;
+/// 16 bits PLT-rel. address.
+pub const R_PARISC_PLTOFF16WF: u32 = 118;
+/// 16 bits PLT-rel. address.
+pub const R_PARISC_PLTOFF16DF: u32 = 119;
+/// 64 bits LT-rel. function ptr.
+pub const R_PARISC_LTOFF_FPTR64: u32 = 120;
+/// LT-rel. fct. ptr., right 14 bits.
+pub const R_PARISC_LTOFF_FPTR14WR: u32 = 123;
+/// LT-rel. fct. ptr., right 14 bits.
+pub const R_PARISC_LTOFF_FPTR14DR: u32 = 124;
+/// 16 bits LT-rel. function ptr.
+pub const R_PARISC_LTOFF_FPTR16F: u32 = 125;
+/// 16 bits LT-rel. function ptr.
+pub const R_PARISC_LTOFF_FPTR16WF: u32 = 126;
+/// 16 bits LT-rel. function ptr.
+pub const R_PARISC_LTOFF_FPTR16DF: u32 = 127;
+#[allow(missing_docs)]
+pub const R_PARISC_LORESERVE: u32 = 128;
+/// Copy relocation.
+pub const R_PARISC_COPY: u32 = 128;
+/// Dynamic reloc, imported PLT
+pub const R_PARISC_IPLT: u32 = 129;
+/// Dynamic reloc, exported PLT
+pub const R_PARISC_EPLT: u32 = 130;
+/// 32 bits TP-rel. address.
+pub const R_PARISC_TPREL32: u32 = 153;
+/// TP-rel. address, left 21 bits.
+pub const R_PARISC_TPREL21L: u32 = 154;
+/// TP-rel. address, right 14 bits.
+pub const R_PARISC_TPREL14R: u32 = 158;
+/// LT-TP-rel. address, left 21 bits.
+pub const R_PARISC_LTOFF_TP21L: u32 = 162;
+/// LT-TP-rel. address, right 14 bits.
+pub const R_PARISC_LTOFF_TP14R: u32 = 166;
+/// 14 bits LT-TP-rel. address.
+pub const R_PARISC_LTOFF_TP14F: u32 = 167;
+/// 64 bits TP-rel. address.
+pub const R_PARISC_TPREL64: u32 = 216;
+/// TP-rel. address, right 14 bits.
+pub const R_PARISC_TPREL14WR: u32 = 219;
+/// TP-rel. address, right 14 bits.
+pub const R_PARISC_TPREL14DR: u32 = 220;
+/// 16 bits TP-rel. address.
+pub const R_PARISC_TPREL16F: u32 = 221;
+/// 16 bits TP-rel. address.
+pub const R_PARISC_TPREL16WF: u32 = 222;
+/// 16 bits TP-rel. address.
+pub const R_PARISC_TPREL16DF: u32 = 223;
+/// 64 bits LT-TP-rel. address.
+pub const R_PARISC_LTOFF_TP64: u32 = 224;
+/// LT-TP-rel. address, right 14 bits.
+pub const R_PARISC_LTOFF_TP14WR: u32 = 227;
+/// LT-TP-rel. address, right 14 bits.
+pub const R_PARISC_LTOFF_TP14DR: u32 = 228;
+/// 16 bits LT-TP-rel. address.
+pub const R_PARISC_LTOFF_TP16F: u32 = 229;
+/// 16 bits LT-TP-rel. address.
+pub const R_PARISC_LTOFF_TP16WF: u32 = 230;
+/// 16 bits LT-TP-rel. address.
+pub const R_PARISC_LTOFF_TP16DF: u32 = 231;
+#[allow(missing_docs)]
+pub const R_PARISC_GNU_VTENTRY: u32 = 232;
+#[allow(missing_docs)]
+pub const R_PARISC_GNU_VTINHERIT: u32 = 233;
+/// GD 21-bit left.
+pub const R_PARISC_TLS_GD21L: u32 = 234;
+/// GD 14-bit right.
+pub const R_PARISC_TLS_GD14R: u32 = 235;
+/// GD call to __t_g_a.
+pub const R_PARISC_TLS_GDCALL: u32 = 236;
+/// LD module 21-bit left.
+pub const R_PARISC_TLS_LDM21L: u32 = 237;
+/// LD module 14-bit right.
+pub const R_PARISC_TLS_LDM14R: u32 = 238;
+/// LD module call to __t_g_a.
+pub const R_PARISC_TLS_LDMCALL: u32 = 239;
+/// LD offset 21-bit left.
+pub const R_PARISC_TLS_LDO21L: u32 = 240;
+/// LD offset 14-bit right.
+pub const R_PARISC_TLS_LDO14R: u32 = 241;
+/// DTP module 32-bit.
+pub const R_PARISC_TLS_DTPMOD32: u32 = 242;
+/// DTP module 64-bit.
+pub const R_PARISC_TLS_DTPMOD64: u32 = 243;
+/// DTP offset 32-bit.
+pub const R_PARISC_TLS_DTPOFF32: u32 = 244;
+/// DTP offset 32-bit.
+pub const R_PARISC_TLS_DTPOFF64: u32 = 245;
+#[allow(missing_docs)]
+pub const R_PARISC_TLS_LE21L: u32 = R_PARISC_TPREL21L;
+#[allow(missing_docs)]
+pub const R_PARISC_TLS_LE14R: u32 = R_PARISC_TPREL14R;
+#[allow(missing_docs)]
+pub const R_PARISC_TLS_IE21L: u32 = R_PARISC_LTOFF_TP21L;
+#[allow(missing_docs)]
+pub const R_PARISC_TLS_IE14R: u32 = R_PARISC_LTOFF_TP14R;
+#[allow(missing_docs)]
+pub const R_PARISC_TLS_TPREL32: u32 = R_PARISC_TPREL32;
+#[allow(missing_docs)]
+pub const R_PARISC_TLS_TPREL64: u32 = R_PARISC_TPREL64;
+#[allow(missing_docs)]
+pub const R_PARISC_HIRESERVE: u32 = 255;
+
+// PA-RISC values for `ProgramHeader*::p_type`.
+
+#[allow(missing_docs)]
+pub const PT_HP_TLS: u32 = PT_LOOS + 0x0;
+#[allow(missing_docs)]
+pub const PT_HP_CORE_NONE: u32 = PT_LOOS + 0x1;
+#[allow(missing_docs)]
+pub const PT_HP_CORE_VERSION: u32 = PT_LOOS + 0x2;
+#[allow(missing_docs)]
+pub const PT_HP_CORE_KERNEL: u32 = PT_LOOS + 0x3;
+#[allow(missing_docs)]
+pub const PT_HP_CORE_COMM: u32 = PT_LOOS + 0x4;
+#[allow(missing_docs)]
+pub const PT_HP_CORE_PROC: u32 = PT_LOOS + 0x5;
+#[allow(missing_docs)]
+pub const PT_HP_CORE_LOADABLE: u32 = PT_LOOS + 0x6;
+#[allow(missing_docs)]
+pub const PT_HP_CORE_STACK: u32 = PT_LOOS + 0x7;
+#[allow(missing_docs)]
+pub const PT_HP_CORE_SHM: u32 = PT_LOOS + 0x8;
+#[allow(missing_docs)]
+pub const PT_HP_CORE_MMF: u32 = PT_LOOS + 0x9;
+#[allow(missing_docs)]
+pub const PT_HP_PARALLEL: u32 = PT_LOOS + 0x10;
+#[allow(missing_docs)]
+pub const PT_HP_FASTBIND: u32 = PT_LOOS + 0x11;
+#[allow(missing_docs)]
+pub const PT_HP_OPT_ANNOT: u32 = PT_LOOS + 0x12;
+#[allow(missing_docs)]
+pub const PT_HP_HSL_ANNOT: u32 = PT_LOOS + 0x13;
+#[allow(missing_docs)]
+pub const PT_HP_STACK: u32 = PT_LOOS + 0x14;
+
+#[allow(missing_docs)]
+pub const PT_PARISC_ARCHEXT: u32 = 0x7000_0000;
+#[allow(missing_docs)]
+pub const PT_PARISC_UNWIND: u32 = 0x7000_0001;
+
+// PA-RISC values for `ProgramHeader*::p_flags`.
+
+#[allow(missing_docs)]
+pub const PF_PARISC_SBP: u32 = 0x0800_0000;
+
+#[allow(missing_docs)]
+pub const PF_HP_PAGE_SIZE: u32 = 0x0010_0000;
+#[allow(missing_docs)]
+pub const PF_HP_FAR_SHARED: u32 = 0x0020_0000;
+#[allow(missing_docs)]
+pub const PF_HP_NEAR_SHARED: u32 = 0x0040_0000;
+#[allow(missing_docs)]
+pub const PF_HP_CODE: u32 = 0x0100_0000;
+#[allow(missing_docs)]
+pub const PF_HP_MODIFY: u32 = 0x0200_0000;
+#[allow(missing_docs)]
+pub const PF_HP_LAZYSWAP: u32 = 0x0400_0000;
+#[allow(missing_docs)]
+pub const PF_HP_SBP: u32 = 0x0800_0000;
+
+// Alpha specific definitions.
+
+// Alpha values for `FileHeader64::e_flags`.
+
+/// All addresses must be < 2GB.
+pub const EF_ALPHA_32BIT: u32 = 1;
+/// Relocations for relaxing exist.
+pub const EF_ALPHA_CANRELAX: u32 = 2;
+
+// Alpha values for `SectionHeader64::sh_type`.
+
+// These two are primerily concerned with ECOFF debugging info.
+#[allow(missing_docs)]
+pub const SHT_ALPHA_DEBUG: u32 = 0x7000_0001;
+#[allow(missing_docs)]
+pub const SHT_ALPHA_REGINFO: u32 = 0x7000_0002;
+
+// Alpha values for `SectionHeader64::sh_flags`.
+
+#[allow(missing_docs)]
+pub const SHF_ALPHA_GPREL: u32 = 0x1000_0000;
+
+// Alpha values for `Sym64::st_other`.
+/// No PV required.
+pub const STO_ALPHA_NOPV: u8 = 0x80;
+/// PV only used for initial ldgp.
+pub const STO_ALPHA_STD_GPLOAD: u8 = 0x88;
+
+// Alpha values for `Rel64::r_type`.
+
+/// No reloc
+pub const R_ALPHA_NONE: u32 = 0;
+/// Direct 32 bit
+pub const R_ALPHA_REFLONG: u32 = 1;
+/// Direct 64 bit
+pub const R_ALPHA_REFQUAD: u32 = 2;
+/// GP relative 32 bit
+pub const R_ALPHA_GPREL32: u32 = 3;
+/// GP relative 16 bit w/optimization
+pub const R_ALPHA_LITERAL: u32 = 4;
+/// Optimization hint for LITERAL
+pub const R_ALPHA_LITUSE: u32 = 5;
+/// Add displacement to GP
+pub const R_ALPHA_GPDISP: u32 = 6;
+/// PC+4 relative 23 bit shifted
+pub const R_ALPHA_BRADDR: u32 = 7;
+/// PC+4 relative 16 bit shifted
+pub const R_ALPHA_HINT: u32 = 8;
+/// PC relative 16 bit
+pub const R_ALPHA_SREL16: u32 = 9;
+/// PC relative 32 bit
+pub const R_ALPHA_SREL32: u32 = 10;
+/// PC relative 64 bit
+pub const R_ALPHA_SREL64: u32 = 11;
+/// GP relative 32 bit, high 16 bits
+pub const R_ALPHA_GPRELHIGH: u32 = 17;
+/// GP relative 32 bit, low 16 bits
+pub const R_ALPHA_GPRELLOW: u32 = 18;
+/// GP relative 16 bit
+pub const R_ALPHA_GPREL16: u32 = 19;
+/// Copy symbol at runtime
+pub const R_ALPHA_COPY: u32 = 24;
+/// Create GOT entry
+pub const R_ALPHA_GLOB_DAT: u32 = 25;
+/// Create PLT entry
+pub const R_ALPHA_JMP_SLOT: u32 = 26;
+/// Adjust by program base
+pub const R_ALPHA_RELATIVE: u32 = 27;
+#[allow(missing_docs)]
+pub const R_ALPHA_TLS_GD_HI: u32 = 28;
+#[allow(missing_docs)]
+pub const R_ALPHA_TLSGD: u32 = 29;
+#[allow(missing_docs)]
+pub const R_ALPHA_TLS_LDM: u32 = 30;
+#[allow(missing_docs)]
+pub const R_ALPHA_DTPMOD64: u32 = 31;
+#[allow(missing_docs)]
+pub const R_ALPHA_GOTDTPREL: u32 = 32;
+#[allow(missing_docs)]
+pub const R_ALPHA_DTPREL64: u32 = 33;
+#[allow(missing_docs)]
+pub const R_ALPHA_DTPRELHI: u32 = 34;
+#[allow(missing_docs)]
+pub const R_ALPHA_DTPRELLO: u32 = 35;
+#[allow(missing_docs)]
+pub const R_ALPHA_DTPREL16: u32 = 36;
+#[allow(missing_docs)]
+pub const R_ALPHA_GOTTPREL: u32 = 37;
+#[allow(missing_docs)]
+pub const R_ALPHA_TPREL64: u32 = 38;
+#[allow(missing_docs)]
+pub const R_ALPHA_TPRELHI: u32 = 39;
+#[allow(missing_docs)]
+pub const R_ALPHA_TPRELLO: u32 = 40;
+#[allow(missing_docs)]
+pub const R_ALPHA_TPREL16: u32 = 41;
+
+// Magic values of the `R_ALPHA_LITUSE` relocation addend.
+#[allow(missing_docs)]
+pub const LITUSE_ALPHA_ADDR: u32 = 0;
+#[allow(missing_docs)]
+pub const LITUSE_ALPHA_BASE: u32 = 1;
+#[allow(missing_docs)]
+pub const LITUSE_ALPHA_BYTOFF: u32 = 2;
+#[allow(missing_docs)]
+pub const LITUSE_ALPHA_JSR: u32 = 3;
+#[allow(missing_docs)]
+pub const LITUSE_ALPHA_TLS_GD: u32 = 4;
+#[allow(missing_docs)]
+pub const LITUSE_ALPHA_TLS_LDM: u32 = 5;
+
+// Alpha values for `Dyn64::d_tag`.
+#[allow(missing_docs)]
+pub const DT_ALPHA_PLTRO: u32 = DT_LOPROC + 0;
+
+// PowerPC specific declarations.
+
+// PowerPC values for `FileHeader*::e_flags`.
+/// PowerPC embedded flag
+pub const EF_PPC_EMB: u32 = 0x8000_0000;
+
+// Cygnus local bits below .
+/// PowerPC -mrelocatable flag
+pub const EF_PPC_RELOCATABLE: u32 = 0x0001_0000;
+/// PowerPC -mrelocatable-lib flag
+pub const EF_PPC_RELOCATABLE_LIB: u32 = 0x0000_8000;
+
+// PowerPC values for `Rel*::r_type` defined by the ABIs.
+#[allow(missing_docs)]
+pub const R_PPC_NONE: u32 = 0;
+/// 32bit absolute address
+pub const R_PPC_ADDR32: u32 = 1;
+/// 26bit address, 2 bits ignored.
+pub const R_PPC_ADDR24: u32 = 2;
+/// 16bit absolute address
+pub const R_PPC_ADDR16: u32 = 3;
+/// lower 16bit of absolute address
+pub const R_PPC_ADDR16_LO: u32 = 4;
+/// high 16bit of absolute address
+pub const R_PPC_ADDR16_HI: u32 = 5;
+/// adjusted high 16bit
+pub const R_PPC_ADDR16_HA: u32 = 6;
+/// 16bit address, 2 bits ignored
+pub const R_PPC_ADDR14: u32 = 7;
+#[allow(missing_docs)]
+pub const R_PPC_ADDR14_BRTAKEN: u32 = 8;
+#[allow(missing_docs)]
+pub const R_PPC_ADDR14_BRNTAKEN: u32 = 9;
+/// PC relative 26 bit
+pub const R_PPC_REL24: u32 = 10;
+/// PC relative 16 bit
+pub const R_PPC_REL14: u32 = 11;
+#[allow(missing_docs)]
+pub const R_PPC_REL14_BRTAKEN: u32 = 12;
+#[allow(missing_docs)]
+pub const R_PPC_REL14_BRNTAKEN: u32 = 13;
+#[allow(missing_docs)]
+pub const R_PPC_GOT16: u32 = 14;
+#[allow(missing_docs)]
+pub const R_PPC_GOT16_LO: u32 = 15;
+#[allow(missing_docs)]
+pub const R_PPC_GOT16_HI: u32 = 16;
+#[allow(missing_docs)]
+pub const R_PPC_GOT16_HA: u32 = 17;
+#[allow(missing_docs)]
+pub const R_PPC_PLTREL24: u32 = 18;
+#[allow(missing_docs)]
+pub const R_PPC_COPY: u32 = 19;
+#[allow(missing_docs)]
+pub const R_PPC_GLOB_DAT: u32 = 20;
+#[allow(missing_docs)]
+pub const R_PPC_JMP_SLOT: u32 = 21;
+#[allow(missing_docs)]
+pub const R_PPC_RELATIVE: u32 = 22;
+#[allow(missing_docs)]
+pub const R_PPC_LOCAL24PC: u32 = 23;
+#[allow(missing_docs)]
+pub const R_PPC_UADDR32: u32 = 24;
+#[allow(missing_docs)]
+pub const R_PPC_UADDR16: u32 = 25;
+#[allow(missing_docs)]
+pub const R_PPC_REL32: u32 = 26;
+#[allow(missing_docs)]
+pub const R_PPC_PLT32: u32 = 27;
+#[allow(missing_docs)]
+pub const R_PPC_PLTREL32: u32 = 28;
+#[allow(missing_docs)]
+pub const R_PPC_PLT16_LO: u32 = 29;
+#[allow(missing_docs)]
+pub const R_PPC_PLT16_HI: u32 = 30;
+#[allow(missing_docs)]
+pub const R_PPC_PLT16_HA: u32 = 31;
+#[allow(missing_docs)]
+pub const R_PPC_SDAREL16: u32 = 32;
+#[allow(missing_docs)]
+pub const R_PPC_SECTOFF: u32 = 33;
+#[allow(missing_docs)]
+pub const R_PPC_SECTOFF_LO: u32 = 34;
+#[allow(missing_docs)]
+pub const R_PPC_SECTOFF_HI: u32 = 35;
+#[allow(missing_docs)]
+pub const R_PPC_SECTOFF_HA: u32 = 36;
+
+// PowerPC values for `Rel*::r_type` defined for the TLS access ABI.
+/// none    (sym+add)@tls
+pub const R_PPC_TLS: u32 = 67;
+/// word32  (sym+add)@dtpmod
+pub const R_PPC_DTPMOD32: u32 = 68;
+/// half16* (sym+add)@tprel
+pub const R_PPC_TPREL16: u32 = 69;
+/// half16  (sym+add)@tprel@l
+pub const R_PPC_TPREL16_LO: u32 = 70;
+/// half16  (sym+add)@tprel@h
+pub const R_PPC_TPREL16_HI: u32 = 71;
+/// half16  (sym+add)@tprel@ha
+pub const R_PPC_TPREL16_HA: u32 = 72;
+/// word32  (sym+add)@tprel
+pub const R_PPC_TPREL32: u32 = 73;
+/// half16*(sym+add)@dtprel
+pub const R_PPC_DTPREL16: u32 = 74;
+/// half16  (sym+add)@dtprel@l
+pub const R_PPC_DTPREL16_LO: u32 = 75;
+/// half16  (sym+add)@dtprel@h
+pub const R_PPC_DTPREL16_HI: u32 = 76;
+/// half16  (sym+add)@dtprel@ha
+pub const R_PPC_DTPREL16_HA: u32 = 77;
+/// word32  (sym+add)@dtprel
+pub const R_PPC_DTPREL32: u32 = 78;
+/// half16* (sym+add)@got@tlsgd
+pub const R_PPC_GOT_TLSGD16: u32 = 79;
+/// half16  (sym+add)@got@tlsgd@l
+pub const R_PPC_GOT_TLSGD16_LO: u32 = 80;
+/// half16  (sym+add)@got@tlsgd@h
+pub const R_PPC_GOT_TLSGD16_HI: u32 = 81;
+/// half16  (sym+add)@got@tlsgd@ha
+pub const R_PPC_GOT_TLSGD16_HA: u32 = 82;
+/// half16* (sym+add)@got@tlsld
+pub const R_PPC_GOT_TLSLD16: u32 = 83;
+/// half16  (sym+add)@got@tlsld@l
+pub const R_PPC_GOT_TLSLD16_LO: u32 = 84;
+/// half16  (sym+add)@got@tlsld@h
+pub const R_PPC_GOT_TLSLD16_HI: u32 = 85;
+/// half16  (sym+add)@got@tlsld@ha
+pub const R_PPC_GOT_TLSLD16_HA: u32 = 86;
+/// half16* (sym+add)@got@tprel
+pub const R_PPC_GOT_TPREL16: u32 = 87;
+/// half16  (sym+add)@got@tprel@l
+pub const R_PPC_GOT_TPREL16_LO: u32 = 88;
+/// half16  (sym+add)@got@tprel@h
+pub const R_PPC_GOT_TPREL16_HI: u32 = 89;
+/// half16  (sym+add)@got@tprel@ha
+pub const R_PPC_GOT_TPREL16_HA: u32 = 90;
+/// half16* (sym+add)@got@dtprel
+pub const R_PPC_GOT_DTPREL16: u32 = 91;
+/// half16* (sym+add)@got@dtprel@l
+pub const R_PPC_GOT_DTPREL16_LO: u32 = 92;
+/// half16* (sym+add)@got@dtprel@h
+pub const R_PPC_GOT_DTPREL16_HI: u32 = 93;
+/// half16* (sym+add)@got@dtprel@ha
+pub const R_PPC_GOT_DTPREL16_HA: u32 = 94;
+/// none    (sym+add)@tlsgd
+pub const R_PPC_TLSGD: u32 = 95;
+/// none    (sym+add)@tlsld
+pub const R_PPC_TLSLD: u32 = 96;
+
+// PowerPC values for `Rel*::r_type` from the Embedded ELF ABI.
+#[allow(missing_docs)]
+pub const R_PPC_EMB_NADDR32: u32 = 101;
+#[allow(missing_docs)]
+pub const R_PPC_EMB_NADDR16: u32 = 102;
+#[allow(missing_docs)]
+pub const R_PPC_EMB_NADDR16_LO: u32 = 103;
+#[allow(missing_docs)]
+pub const R_PPC_EMB_NADDR16_HI: u32 = 104;
+#[allow(missing_docs)]
+pub const R_PPC_EMB_NADDR16_HA: u32 = 105;
+#[allow(missing_docs)]
+pub const R_PPC_EMB_SDAI16: u32 = 106;
+#[allow(missing_docs)]
+pub const R_PPC_EMB_SDA2I16: u32 = 107;
+#[allow(missing_docs)]
+pub const R_PPC_EMB_SDA2REL: u32 = 108;
+/// 16 bit offset in SDA
+pub const R_PPC_EMB_SDA21: u32 = 109;
+#[allow(missing_docs)]
+pub const R_PPC_EMB_MRKREF: u32 = 110;
+#[allow(missing_docs)]
+pub const R_PPC_EMB_RELSEC16: u32 = 111;
+#[allow(missing_docs)]
+pub const R_PPC_EMB_RELST_LO: u32 = 112;
+#[allow(missing_docs)]
+pub const R_PPC_EMB_RELST_HI: u32 = 113;
+#[allow(missing_docs)]
+pub const R_PPC_EMB_RELST_HA: u32 = 114;
+#[allow(missing_docs)]
+pub const R_PPC_EMB_BIT_FLD: u32 = 115;
+/// 16 bit relative offset in SDA
+pub const R_PPC_EMB_RELSDA: u32 = 116;
+
+// Diab tool values for `Rel*::r_type`.
+/// like EMB_SDA21, but lower 16 bit
+pub const R_PPC_DIAB_SDA21_LO: u32 = 180;
+/// like EMB_SDA21, but high 16 bit
+pub const R_PPC_DIAB_SDA21_HI: u32 = 181;
+/// like EMB_SDA21, adjusted high 16
+pub const R_PPC_DIAB_SDA21_HA: u32 = 182;
+/// like EMB_RELSDA, but lower 16 bit
+pub const R_PPC_DIAB_RELSDA_LO: u32 = 183;
+/// like EMB_RELSDA, but high 16 bit
+pub const R_PPC_DIAB_RELSDA_HI: u32 = 184;
+/// like EMB_RELSDA, adjusted high 16
+pub const R_PPC_DIAB_RELSDA_HA: u32 = 185;
+
+/// GNU extension to support local ifunc.
+pub const R_PPC_IRELATIVE: u32 = 248;
+
+// GNU relocs used in PIC code sequences.
+/// half16   (sym+add-.)
+pub const R_PPC_REL16: u32 = 249;
+/// half16   (sym+add-.)@l
+pub const R_PPC_REL16_LO: u32 = 250;
+/// half16   (sym+add-.)@h
+pub const R_PPC_REL16_HI: u32 = 251;
+/// half16   (sym+add-.)@ha
+pub const R_PPC_REL16_HA: u32 = 252;
+
+/// This is a phony reloc to handle any old fashioned TOC16 references that may
+/// still be in object files.
+pub const R_PPC_TOC16: u32 = 255;
+
+// PowerPC specific values for `Dyn*::d_tag`.
+#[allow(missing_docs)]
+pub const DT_PPC_GOT: u32 = DT_LOPROC + 0;
+#[allow(missing_docs)]
+pub const DT_PPC_OPT: u32 = DT_LOPROC + 1;
+
+// PowerPC specific values for the `DT_PPC_OPT` entry.
+#[allow(missing_docs)]
+pub const PPC_OPT_TLS: u32 = 1;
+
+// PowerPC64 values for `Rel*::r_type` defined by the ABIs.
+#[allow(missing_docs)]
+pub const R_PPC64_NONE: u32 = R_PPC_NONE;
+/// 32bit absolute address
+pub const R_PPC64_ADDR32: u32 = R_PPC_ADDR32;
+/// 26bit address, word aligned
+pub const R_PPC64_ADDR24: u32 = R_PPC_ADDR24;
+/// 16bit absolute address
+pub const R_PPC64_ADDR16: u32 = R_PPC_ADDR16;
+/// lower 16bits of address
+pub const R_PPC64_ADDR16_LO: u32 = R_PPC_ADDR16_LO;
+/// high 16bits of address.
+pub const R_PPC64_ADDR16_HI: u32 = R_PPC_ADDR16_HI;
+/// adjusted high 16bits.
+pub const R_PPC64_ADDR16_HA: u32 = R_PPC_ADDR16_HA;
+/// 16bit address, word aligned
+pub const R_PPC64_ADDR14: u32 = R_PPC_ADDR14;
+#[allow(missing_docs)]
+pub const R_PPC64_ADDR14_BRTAKEN: u32 = R_PPC_ADDR14_BRTAKEN;
+#[allow(missing_docs)]
+pub const R_PPC64_ADDR14_BRNTAKEN: u32 = R_PPC_ADDR14_BRNTAKEN;
+/// PC-rel. 26 bit, word aligned
+pub const R_PPC64_REL24: u32 = R_PPC_REL24;
+/// PC relative 16 bit
+pub const R_PPC64_REL14: u32 = R_PPC_REL14;
+#[allow(missing_docs)]
+pub const R_PPC64_REL14_BRTAKEN: u32 = R_PPC_REL14_BRTAKEN;
+#[allow(missing_docs)]
+pub const R_PPC64_REL14_BRNTAKEN: u32 = R_PPC_REL14_BRNTAKEN;
+#[allow(missing_docs)]
+pub const R_PPC64_GOT16: u32 = R_PPC_GOT16;
+#[allow(missing_docs)]
+pub const R_PPC64_GOT16_LO: u32 = R_PPC_GOT16_LO;
+#[allow(missing_docs)]
+pub const R_PPC64_GOT16_HI: u32 = R_PPC_GOT16_HI;
+#[allow(missing_docs)]
+pub const R_PPC64_GOT16_HA: u32 = R_PPC_GOT16_HA;
+
+#[allow(missing_docs)]
+pub const R_PPC64_COPY: u32 = R_PPC_COPY;
+#[allow(missing_docs)]
+pub const R_PPC64_GLOB_DAT: u32 = R_PPC_GLOB_DAT;
+#[allow(missing_docs)]
+pub const R_PPC64_JMP_SLOT: u32 = R_PPC_JMP_SLOT;
+#[allow(missing_docs)]
+pub const R_PPC64_RELATIVE: u32 = R_PPC_RELATIVE;
+
+#[allow(missing_docs)]
+pub const R_PPC64_UADDR32: u32 = R_PPC_UADDR32;
+#[allow(missing_docs)]
+pub const R_PPC64_UADDR16: u32 = R_PPC_UADDR16;
+#[allow(missing_docs)]
+pub const R_PPC64_REL32: u32 = R_PPC_REL32;
+#[allow(missing_docs)]
+pub const R_PPC64_PLT32: u32 = R_PPC_PLT32;
+#[allow(missing_docs)]
+pub const R_PPC64_PLTREL32: u32 = R_PPC_PLTREL32;
+#[allow(missing_docs)]
+pub const R_PPC64_PLT16_LO: u32 = R_PPC_PLT16_LO;
+#[allow(missing_docs)]
+pub const R_PPC64_PLT16_HI: u32 = R_PPC_PLT16_HI;
+#[allow(missing_docs)]
+pub const R_PPC64_PLT16_HA: u32 = R_PPC_PLT16_HA;
+
+#[allow(missing_docs)]
+pub const R_PPC64_SECTOFF: u32 = R_PPC_SECTOFF;
+#[allow(missing_docs)]
+pub const R_PPC64_SECTOFF_LO: u32 = R_PPC_SECTOFF_LO;
+#[allow(missing_docs)]
+pub const R_PPC64_SECTOFF_HI: u32 = R_PPC_SECTOFF_HI;
+#[allow(missing_docs)]
+pub const R_PPC64_SECTOFF_HA: u32 = R_PPC_SECTOFF_HA;
+/// word30 (S + A - P) >> 2
+pub const R_PPC64_ADDR30: u32 = 37;
+/// doubleword64 S + A
+pub const R_PPC64_ADDR64: u32 = 38;
+/// half16 #higher(S + A)
+pub const R_PPC64_ADDR16_HIGHER: u32 = 39;
+/// half16 #highera(S + A)
+pub const R_PPC64_ADDR16_HIGHERA: u32 = 40;
+/// half16 #highest(S + A)
+pub const R_PPC64_ADDR16_HIGHEST: u32 = 41;
+/// half16 #highesta(S + A)
+pub const R_PPC64_ADDR16_HIGHESTA: u32 = 42;
+/// doubleword64 S + A
+pub const R_PPC64_UADDR64: u32 = 43;
+/// doubleword64 S + A - P
+pub const R_PPC64_REL64: u32 = 44;
+/// doubleword64 L + A
+pub const R_PPC64_PLT64: u32 = 45;
+/// doubleword64 L + A - P
+pub const R_PPC64_PLTREL64: u32 = 46;
+/// half16* S + A - .TOC
+pub const R_PPC64_TOC16: u32 = 47;
+/// half16 #lo(S + A - .TOC.)
+pub const R_PPC64_TOC16_LO: u32 = 48;
+/// half16 #hi(S + A - .TOC.)
+pub const R_PPC64_TOC16_HI: u32 = 49;
+/// half16 #ha(S + A - .TOC.)
+pub const R_PPC64_TOC16_HA: u32 = 50;
+/// doubleword64 .TOC
+pub const R_PPC64_TOC: u32 = 51;
+/// half16* M + A
+pub const R_PPC64_PLTGOT16: u32 = 52;
+/// half16 #lo(M + A)
+pub const R_PPC64_PLTGOT16_LO: u32 = 53;
+/// half16 #hi(M + A)
+pub const R_PPC64_PLTGOT16_HI: u32 = 54;
+/// half16 #ha(M + A)
+pub const R_PPC64_PLTGOT16_HA: u32 = 55;
+
+/// half16ds* (S + A) >> 2
+pub const R_PPC64_ADDR16_DS: u32 = 56;
+/// half16ds  #lo(S + A) >> 2
+pub const R_PPC64_ADDR16_LO_DS: u32 = 57;
+/// half16ds* (G + A) >> 2
+pub const R_PPC64_GOT16_DS: u32 = 58;
+/// half16ds  #lo(G + A) >> 2
+pub const R_PPC64_GOT16_LO_DS: u32 = 59;
+/// half16ds  #lo(L + A) >> 2
+pub const R_PPC64_PLT16_LO_DS: u32 = 60;
+/// half16ds* (R + A) >> 2
+pub const R_PPC64_SECTOFF_DS: u32 = 61;
+/// half16ds  #lo(R + A) >> 2
+pub const R_PPC64_SECTOFF_LO_DS: u32 = 62;
+/// half16ds* (S + A - .TOC.) >> 2
+pub const R_PPC64_TOC16_DS: u32 = 63;
+/// half16ds  #lo(S + A - .TOC.) >> 2
+pub const R_PPC64_TOC16_LO_DS: u32 = 64;
+/// half16ds* (M + A) >> 2
+pub const R_PPC64_PLTGOT16_DS: u32 = 65;
+/// half16ds  #lo(M + A) >> 2
+pub const R_PPC64_PLTGOT16_LO_DS: u32 = 66;
+
+// PowerPC64 values for `Rel*::r_type` defined for the TLS access ABI.
+/// none    (sym+add)@tls
+pub const R_PPC64_TLS: u32 = 67;
+/// doubleword64 (sym+add)@dtpmod
+pub const R_PPC64_DTPMOD64: u32 = 68;
+/// half16* (sym+add)@tprel
+pub const R_PPC64_TPREL16: u32 = 69;
+/// half16  (sym+add)@tprel@l
+pub const R_PPC64_TPREL16_LO: u32 = 70;
+/// half16  (sym+add)@tprel@h
+pub const R_PPC64_TPREL16_HI: u32 = 71;
+/// half16  (sym+add)@tprel@ha
+pub const R_PPC64_TPREL16_HA: u32 = 72;
+/// doubleword64 (sym+add)@tprel
+pub const R_PPC64_TPREL64: u32 = 73;
+/// half16* (sym+add)@dtprel
+pub const R_PPC64_DTPREL16: u32 = 74;
+/// half16  (sym+add)@dtprel@l
+pub const R_PPC64_DTPREL16_LO: u32 = 75;
+/// half16  (sym+add)@dtprel@h
+pub const R_PPC64_DTPREL16_HI: u32 = 76;
+/// half16  (sym+add)@dtprel@ha
+pub const R_PPC64_DTPREL16_HA: u32 = 77;
+/// doubleword64 (sym+add)@dtprel
+pub const R_PPC64_DTPREL64: u32 = 78;
+/// half16* (sym+add)@got@tlsgd
+pub const R_PPC64_GOT_TLSGD16: u32 = 79;
+/// half16  (sym+add)@got@tlsgd@l
+pub const R_PPC64_GOT_TLSGD16_LO: u32 = 80;
+/// half16  (sym+add)@got@tlsgd@h
+pub const R_PPC64_GOT_TLSGD16_HI: u32 = 81;
+/// half16  (sym+add)@got@tlsgd@ha
+pub const R_PPC64_GOT_TLSGD16_HA: u32 = 82;
+/// half16* (sym+add)@got@tlsld
+pub const R_PPC64_GOT_TLSLD16: u32 = 83;
+/// half16  (sym+add)@got@tlsld@l
+pub const R_PPC64_GOT_TLSLD16_LO: u32 = 84;
+/// half16  (sym+add)@got@tlsld@h
+pub const R_PPC64_GOT_TLSLD16_HI: u32 = 85;
+/// half16  (sym+add)@got@tlsld@ha
+pub const R_PPC64_GOT_TLSLD16_HA: u32 = 86;
+/// half16ds* (sym+add)@got@tprel
+pub const R_PPC64_GOT_TPREL16_DS: u32 = 87;
+/// half16ds (sym+add)@got@tprel@l
+pub const R_PPC64_GOT_TPREL16_LO_DS: u32 = 88;
+/// half16  (sym+add)@got@tprel@h
+pub const R_PPC64_GOT_TPREL16_HI: u32 = 89;
+/// half16  (sym+add)@got@tprel@ha
+pub const R_PPC64_GOT_TPREL16_HA: u32 = 90;
+/// half16ds* (sym+add)@got@dtprel
+pub const R_PPC64_GOT_DTPREL16_DS: u32 = 91;
+/// half16ds (sym+add)@got@dtprel@l
+pub const R_PPC64_GOT_DTPREL16_LO_DS: u32 = 92;
+/// half16  (sym+add)@got@dtprel@h
+pub const R_PPC64_GOT_DTPREL16_HI: u32 = 93;
+/// half16  (sym+add)@got@dtprel@ha
+pub const R_PPC64_GOT_DTPREL16_HA: u32 = 94;
+/// half16ds* (sym+add)@tprel
+pub const R_PPC64_TPREL16_DS: u32 = 95;
+/// half16ds (sym+add)@tprel@l
+pub const R_PPC64_TPREL16_LO_DS: u32 = 96;
+/// half16  (sym+add)@tprel@higher
+pub const R_PPC64_TPREL16_HIGHER: u32 = 97;
+/// half16  (sym+add)@tprel@highera
+pub const R_PPC64_TPREL16_HIGHERA: u32 = 98;
+/// half16  (sym+add)@tprel@highest
+pub const R_PPC64_TPREL16_HIGHEST: u32 = 99;
+/// half16  (sym+add)@tprel@highesta
+pub const R_PPC64_TPREL16_HIGHESTA: u32 = 100;
+/// half16ds* (sym+add)@dtprel
+pub const R_PPC64_DTPREL16_DS: u32 = 101;
+/// half16ds (sym+add)@dtprel@l
+pub const R_PPC64_DTPREL16_LO_DS: u32 = 102;
+/// half16  (sym+add)@dtprel@higher
+pub const R_PPC64_DTPREL16_HIGHER: u32 = 103;
+/// half16  (sym+add)@dtprel@highera
+pub const R_PPC64_DTPREL16_HIGHERA: u32 = 104;
+/// half16  (sym+add)@dtprel@highest
+pub const R_PPC64_DTPREL16_HIGHEST: u32 = 105;
+/// half16  (sym+add)@dtprel@highesta
+pub const R_PPC64_DTPREL16_HIGHESTA: u32 = 106;
+/// none    (sym+add)@tlsgd
+pub const R_PPC64_TLSGD: u32 = 107;
+/// none    (sym+add)@tlsld
+pub const R_PPC64_TLSLD: u32 = 108;
+/// none
+pub const R_PPC64_TOCSAVE: u32 = 109;
+
+// Added when HA and HI relocs were changed to report overflows.
+#[allow(missing_docs)]
+pub const R_PPC64_ADDR16_HIGH: u32 = 110;
+#[allow(missing_docs)]
+pub const R_PPC64_ADDR16_HIGHA: u32 = 111;
+#[allow(missing_docs)]
+pub const R_PPC64_TPREL16_HIGH: u32 = 112;
+#[allow(missing_docs)]
+pub const R_PPC64_TPREL16_HIGHA: u32 = 113;
+#[allow(missing_docs)]
+pub const R_PPC64_DTPREL16_HIGH: u32 = 114;
+#[allow(missing_docs)]
+pub const R_PPC64_DTPREL16_HIGHA: u32 = 115;
+
+/// GNU extension to support local ifunc.
+#[allow(missing_docs)]
+pub const R_PPC64_JMP_IREL: u32 = 247;
+/// GNU extension to support local ifunc.
+#[allow(missing_docs)]
+pub const R_PPC64_IRELATIVE: u32 = 248;
+/// half16   (sym+add-.)
+pub const R_PPC64_REL16: u32 = 249;
+/// half16   (sym+add-.)@l
+pub const R_PPC64_REL16_LO: u32 = 250;
+/// half16   (sym+add-.)@h
+pub const R_PPC64_REL16_HI: u32 = 251;
+/// half16   (sym+add-.)@ha
+pub const R_PPC64_REL16_HA: u32 = 252;
+
+// PowerPC64 values for `FileHeader64::e_flags.
+/// PowerPC64 bits specifying ABI.
+///
+/// 1 for original function descriptor using ABI,
+/// 2 for revised ABI without function descriptors,
+/// 0 for unspecified or not using any features affected by the differences.
+pub const EF_PPC64_ABI: u32 = 3;
+
+// PowerPC64 values for `Dyn64::d_tag.
+#[allow(missing_docs)]
+pub const DT_PPC64_GLINK: u32 = DT_LOPROC + 0;
+#[allow(missing_docs)]
+pub const DT_PPC64_OPD: u32 = DT_LOPROC + 1;
+#[allow(missing_docs)]
+pub const DT_PPC64_OPDSZ: u32 = DT_LOPROC + 2;
+#[allow(missing_docs)]
+pub const DT_PPC64_OPT: u32 = DT_LOPROC + 3;
+
+// PowerPC64 bits for `DT_PPC64_OPT` entry.
+#[allow(missing_docs)]
+pub const PPC64_OPT_TLS: u32 = 1;
+#[allow(missing_docs)]
+pub const PPC64_OPT_MULTI_TOC: u32 = 2;
+#[allow(missing_docs)]
+pub const PPC64_OPT_LOCALENTRY: u32 = 4;
+
+// PowerPC64 values for `Sym64::st_other.
+#[allow(missing_docs)]
+pub const STO_PPC64_LOCAL_BIT: u8 = 5;
+#[allow(missing_docs)]
+pub const STO_PPC64_LOCAL_MASK: u8 = 7 << STO_PPC64_LOCAL_BIT;
+
+// ARM specific declarations.
+
+// ARM values for `FileHeader*::e_flags`.
+#[allow(missing_docs)]
+pub const EF_ARM_RELEXEC: u32 = 0x01;
+#[allow(missing_docs)]
+pub const EF_ARM_HASENTRY: u32 = 0x02;
+#[allow(missing_docs)]
+pub const EF_ARM_INTERWORK: u32 = 0x04;
+#[allow(missing_docs)]
+pub const EF_ARM_APCS_26: u32 = 0x08;
+#[allow(missing_docs)]
+pub const EF_ARM_APCS_FLOAT: u32 = 0x10;
+#[allow(missing_docs)]
+pub const EF_ARM_PIC: u32 = 0x20;
+/// 8-bit structure alignment is in use
+pub const EF_ARM_ALIGN8: u32 = 0x40;
+#[allow(missing_docs)]
+pub const EF_ARM_NEW_ABI: u32 = 0x80;
+#[allow(missing_docs)]
+pub const EF_ARM_OLD_ABI: u32 = 0x100;
+#[allow(missing_docs)]
+pub const EF_ARM_SOFT_FLOAT: u32 = 0x200;
+#[allow(missing_docs)]
+pub const EF_ARM_VFP_FLOAT: u32 = 0x400;
+#[allow(missing_docs)]
+pub const EF_ARM_MAVERICK_FLOAT: u32 = 0x800;
+
+/// NB conflicts with EF_ARM_SOFT_FLOAT
+pub const EF_ARM_ABI_FLOAT_SOFT: u32 = 0x200;
+/// NB conflicts with EF_ARM_VFP_FLOAT
+pub const EF_ARM_ABI_FLOAT_HARD: u32 = 0x400;
+
+// Other constants defined in the ARM ELF spec. version B-01.
+// NB. These conflict with values defined above.
+#[allow(missing_docs)]
+pub const EF_ARM_SYMSARESORTED: u32 = 0x04;
+#[allow(missing_docs)]
+pub const EF_ARM_DYNSYMSUSESEGIDX: u32 = 0x08;
+#[allow(missing_docs)]
+pub const EF_ARM_MAPSYMSFIRST: u32 = 0x10;
+
+// Constants defined in AAELF.
+#[allow(missing_docs)]
+pub const EF_ARM_BE8: u32 = 0x0080_0000;
+#[allow(missing_docs)]
+pub const EF_ARM_LE8: u32 = 0x0040_0000;
+
+#[allow(missing_docs)]
+pub const EF_ARM_EABIMASK: u32 = 0xff00_0000;
+#[allow(missing_docs)]
+pub const EF_ARM_EABI_UNKNOWN: u32 = 0x0000_0000;
+#[allow(missing_docs)]
+pub const EF_ARM_EABI_VER1: u32 = 0x0100_0000;
+#[allow(missing_docs)]
+pub const EF_ARM_EABI_VER2: u32 = 0x0200_0000;
+#[allow(missing_docs)]
+pub const EF_ARM_EABI_VER3: u32 = 0x0300_0000;
+#[allow(missing_docs)]
+pub const EF_ARM_EABI_VER4: u32 = 0x0400_0000;
+#[allow(missing_docs)]
+pub const EF_ARM_EABI_VER5: u32 = 0x0500_0000;
+
+// ARM Thumb values for `st_type` component of `Sym*::st_info`.
+/// A Thumb function.
+pub const STT_ARM_TFUNC: u8 = STT_LOPROC;
+/// A Thumb label.
+pub const STT_ARM_16BIT: u8 = STT_HIPROC;
+
+// ARM values for `SectionHeader*::sh_flags`.
+/// Section contains an entry point
+pub const SHF_ARM_ENTRYSECT: u32 = 0x1000_0000;
+/// Section may be multiply defined in the input to a link step.
+pub const SHF_ARM_COMDEF: u32 = 0x8000_0000;
+
+// ARM values for `ProgramHeader*::p_flags`.
+/// Segment contains the location addressed by the static base.
+pub const PF_ARM_SB: u32 = 0x1000_0000;
+/// Position-independent segment.
+pub const PF_ARM_PI: u32 = 0x2000_0000;
+/// Absolute segment.
+pub const PF_ARM_ABS: u32 = 0x4000_0000;
+
+// ARM values for `ProgramHeader*::p_type`.
+/// ARM unwind segment.
+pub const PT_ARM_EXIDX: u32 = PT_LOPROC + 1;
+
+// ARM values for `SectionHeader*::sh_type`.
+/// ARM unwind section.
+pub const SHT_ARM_EXIDX: u32 = SHT_LOPROC + 1;
+/// Preemption details.
+pub const SHT_ARM_PREEMPTMAP: u32 = SHT_LOPROC + 2;
+/// ARM attributes section.
+pub const SHT_ARM_ATTRIBUTES: u32 = SHT_LOPROC + 3;
+
+// AArch64 values for `Rel*::r_type`.
+
+/// No relocation.
+pub const R_AARCH64_NONE: u32 = 0;
+
+// ILP32 AArch64 relocs.
+/// Direct 32 bit.
+pub const R_AARCH64_P32_ABS32: u32 = 1;
+/// Copy symbol at runtime.
+pub const R_AARCH64_P32_COPY: u32 = 180;
+/// Create GOT entry.
+pub const R_AARCH64_P32_GLOB_DAT: u32 = 181;
+/// Create PLT entry.
+pub const R_AARCH64_P32_JUMP_SLOT: u32 = 182;
+/// Adjust by program base.
+pub const R_AARCH64_P32_RELATIVE: u32 = 183;
+/// Module number, 32 bit.
+pub const R_AARCH64_P32_TLS_DTPMOD: u32 = 184;
+/// Module-relative offset, 32 bit.
+pub const R_AARCH64_P32_TLS_DTPREL: u32 = 185;
+/// TP-relative offset, 32 bit.
+pub const R_AARCH64_P32_TLS_TPREL: u32 = 186;
+/// TLS Descriptor.
+pub const R_AARCH64_P32_TLSDESC: u32 = 187;
+/// STT_GNU_IFUNC relocation.
+pub const R_AARCH64_P32_IRELATIVE: u32 = 188;
+
+// LP64 AArch64 relocs.
+/// Direct 64 bit.
+pub const R_AARCH64_ABS64: u32 = 257;
+/// Direct 32 bit.
+pub const R_AARCH64_ABS32: u32 = 258;
+/// Direct 16-bit.
+pub const R_AARCH64_ABS16: u32 = 259;
+/// PC-relative 64-bit.
+pub const R_AARCH64_PREL64: u32 = 260;
+/// PC-relative 32-bit.
+pub const R_AARCH64_PREL32: u32 = 261;
+/// PC-relative 16-bit.
+pub const R_AARCH64_PREL16: u32 = 262;
+/// Dir. MOVZ imm. from bits 15:0.
+pub const R_AARCH64_MOVW_UABS_G0: u32 = 263;
+/// Likewise for MOVK; no check.
+pub const R_AARCH64_MOVW_UABS_G0_NC: u32 = 264;
+/// Dir. MOVZ imm. from bits 31:16.
+pub const R_AARCH64_MOVW_UABS_G1: u32 = 265;
+/// Likewise for MOVK; no check.
+pub const R_AARCH64_MOVW_UABS_G1_NC: u32 = 266;
+/// Dir. MOVZ imm. from bits 47:32.
+pub const R_AARCH64_MOVW_UABS_G2: u32 = 267;
+/// Likewise for MOVK; no check.
+pub const R_AARCH64_MOVW_UABS_G2_NC: u32 = 268;
+/// Dir. MOV{K,Z} imm. from 63:48.
+pub const R_AARCH64_MOVW_UABS_G3: u32 = 269;
+/// Dir. MOV{N,Z} imm. from 15:0.
+pub const R_AARCH64_MOVW_SABS_G0: u32 = 270;
+/// Dir. MOV{N,Z} imm. from 31:16.
+pub const R_AARCH64_MOVW_SABS_G1: u32 = 271;
+/// Dir. MOV{N,Z} imm. from 47:32.
+pub const R_AARCH64_MOVW_SABS_G2: u32 = 272;
+/// PC-rel. LD imm. from bits 20:2.
+pub const R_AARCH64_LD_PREL_LO19: u32 = 273;
+/// PC-rel. ADR imm. from bits 20:0.
+pub const R_AARCH64_ADR_PREL_LO21: u32 = 274;
+/// Page-rel. ADRP imm. from 32:12.
+pub const R_AARCH64_ADR_PREL_PG_HI21: u32 = 275;
+/// Likewise; no overflow check.
+pub const R_AARCH64_ADR_PREL_PG_HI21_NC: u32 = 276;
+/// Dir. ADD imm. from bits 11:0.
+pub const R_AARCH64_ADD_ABS_LO12_NC: u32 = 277;
+/// Likewise for LD/ST; no check.
+pub const R_AARCH64_LDST8_ABS_LO12_NC: u32 = 278;
+/// PC-rel. TBZ/TBNZ imm. from 15:2.
+pub const R_AARCH64_TSTBR14: u32 = 279;
+/// PC-rel. cond. br. imm. from 20:2.
+pub const R_AARCH64_CONDBR19: u32 = 280;
+/// PC-rel. B imm. from bits 27:2.
+pub const R_AARCH64_JUMP26: u32 = 282;
+/// Likewise for CALL.
+pub const R_AARCH64_CALL26: u32 = 283;
+/// Dir. ADD imm. from bits 11:1.
+pub const R_AARCH64_LDST16_ABS_LO12_NC: u32 = 284;
+/// Likewise for bits 11:2.
+pub const R_AARCH64_LDST32_ABS_LO12_NC: u32 = 285;
+/// Likewise for bits 11:3.
+pub const R_AARCH64_LDST64_ABS_LO12_NC: u32 = 286;
+/// PC-rel. MOV{N,Z} imm. from 15:0.
+pub const R_AARCH64_MOVW_PREL_G0: u32 = 287;
+/// Likewise for MOVK; no check.
+pub const R_AARCH64_MOVW_PREL_G0_NC: u32 = 288;
+/// PC-rel. MOV{N,Z} imm. from 31:16.
+pub const R_AARCH64_MOVW_PREL_G1: u32 = 289;
+/// Likewise for MOVK; no check.
+pub const R_AARCH64_MOVW_PREL_G1_NC: u32 = 290;
+/// PC-rel. MOV{N,Z} imm. from 47:32.
+pub const R_AARCH64_MOVW_PREL_G2: u32 = 291;
+/// Likewise for MOVK; no check.
+pub const R_AARCH64_MOVW_PREL_G2_NC: u32 = 292;
+/// PC-rel. MOV{N,Z} imm. from 63:48.
+pub const R_AARCH64_MOVW_PREL_G3: u32 = 293;
+/// Dir. ADD imm. from bits 11:4.
+pub const R_AARCH64_LDST128_ABS_LO12_NC: u32 = 299;
+/// GOT-rel. off. MOV{N,Z} imm. 15:0.
+pub const R_AARCH64_MOVW_GOTOFF_G0: u32 = 300;
+/// Likewise for MOVK; no check.
+pub const R_AARCH64_MOVW_GOTOFF_G0_NC: u32 = 301;
+/// GOT-rel. o. MOV{N,Z} imm. 31:16.
+pub const R_AARCH64_MOVW_GOTOFF_G1: u32 = 302;
+/// Likewise for MOVK; no check.
+pub const R_AARCH64_MOVW_GOTOFF_G1_NC: u32 = 303;
+/// GOT-rel. o. MOV{N,Z} imm. 47:32.
+pub const R_AARCH64_MOVW_GOTOFF_G2: u32 = 304;
+/// Likewise for MOVK; no check.
+pub const R_AARCH64_MOVW_GOTOFF_G2_NC: u32 = 305;
+/// GOT-rel. o. MOV{N,Z} imm. 63:48.
+pub const R_AARCH64_MOVW_GOTOFF_G3: u32 = 306;
+/// GOT-relative 64-bit.
+pub const R_AARCH64_GOTREL64: u32 = 307;
+/// GOT-relative 32-bit.
+pub const R_AARCH64_GOTREL32: u32 = 308;
+/// PC-rel. GOT off. load imm. 20:2.
+pub const R_AARCH64_GOT_LD_PREL19: u32 = 309;
+/// GOT-rel. off. LD/ST imm. 14:3.
+pub const R_AARCH64_LD64_GOTOFF_LO15: u32 = 310;
+/// P-page-rel. GOT off. ADRP 32:12.
+pub const R_AARCH64_ADR_GOT_PAGE: u32 = 311;
+/// Dir. GOT off. LD/ST imm. 11:3.
+pub const R_AARCH64_LD64_GOT_LO12_NC: u32 = 312;
+/// GOT-page-rel. GOT off. LD/ST 14:3
+pub const R_AARCH64_LD64_GOTPAGE_LO15: u32 = 313;
+/// PC-relative ADR imm. 20:0.
+pub const R_AARCH64_TLSGD_ADR_PREL21: u32 = 512;
+/// page-rel. ADRP imm. 32:12.
+pub const R_AARCH64_TLSGD_ADR_PAGE21: u32 = 513;
+/// direct ADD imm. from 11:0.
+pub const R_AARCH64_TLSGD_ADD_LO12_NC: u32 = 514;
+/// GOT-rel. MOV{N,Z} 31:16.
+pub const R_AARCH64_TLSGD_MOVW_G1: u32 = 515;
+/// GOT-rel. MOVK imm. 15:0.
+pub const R_AARCH64_TLSGD_MOVW_G0_NC: u32 = 516;
+/// Like 512; local dynamic model.
+pub const R_AARCH64_TLSLD_ADR_PREL21: u32 = 517;
+/// Like 513; local dynamic model.
+pub const R_AARCH64_TLSLD_ADR_PAGE21: u32 = 518;
+/// Like 514; local dynamic model.
+pub const R_AARCH64_TLSLD_ADD_LO12_NC: u32 = 519;
+/// Like 515; local dynamic model.
+pub const R_AARCH64_TLSLD_MOVW_G1: u32 = 520;
+/// Like 516; local dynamic model.
+pub const R_AARCH64_TLSLD_MOVW_G0_NC: u32 = 521;
+/// TLS PC-rel. load imm. 20:2.
+pub const R_AARCH64_TLSLD_LD_PREL19: u32 = 522;
+/// TLS DTP-rel. MOV{N,Z} 47:32.
+pub const R_AARCH64_TLSLD_MOVW_DTPREL_G2: u32 = 523;
+/// TLS DTP-rel. MOV{N,Z} 31:16.
+pub const R_AARCH64_TLSLD_MOVW_DTPREL_G1: u32 = 524;
+/// Likewise; MOVK; no check.
+pub const R_AARCH64_TLSLD_MOVW_DTPREL_G1_NC: u32 = 525;
+/// TLS DTP-rel. MOV{N,Z} 15:0.
+pub const R_AARCH64_TLSLD_MOVW_DTPREL_G0: u32 = 526;
+/// Likewise; MOVK; no check.
+pub const R_AARCH64_TLSLD_MOVW_DTPREL_G0_NC: u32 = 527;
+/// DTP-rel. ADD imm. from 23:12.
+pub const R_AARCH64_TLSLD_ADD_DTPREL_HI12: u32 = 528;
+/// DTP-rel. ADD imm. from 11:0.
+pub const R_AARCH64_TLSLD_ADD_DTPREL_LO12: u32 = 529;
+/// Likewise; no ovfl. check.
+pub const R_AARCH64_TLSLD_ADD_DTPREL_LO12_NC: u32 = 530;
+/// DTP-rel. LD/ST imm. 11:0.
+pub const R_AARCH64_TLSLD_LDST8_DTPREL_LO12: u32 = 531;
+/// Likewise; no check.
+pub const R_AARCH64_TLSLD_LDST8_DTPREL_LO12_NC: u32 = 532;
+/// DTP-rel. LD/ST imm. 11:1.
+pub const R_AARCH64_TLSLD_LDST16_DTPREL_LO12: u32 = 533;
+/// Likewise; no check.
+pub const R_AARCH64_TLSLD_LDST16_DTPREL_LO12_NC: u32 = 534;
+/// DTP-rel. LD/ST imm. 11:2.
+pub const R_AARCH64_TLSLD_LDST32_DTPREL_LO12: u32 = 535;
+/// Likewise; no check.
+pub const R_AARCH64_TLSLD_LDST32_DTPREL_LO12_NC: u32 = 536;
+/// DTP-rel. LD/ST imm. 11:3.
+pub const R_AARCH64_TLSLD_LDST64_DTPREL_LO12: u32 = 537;
+/// Likewise; no check.
+pub const R_AARCH64_TLSLD_LDST64_DTPREL_LO12_NC: u32 = 538;
+/// GOT-rel. MOV{N,Z} 31:16.
+pub const R_AARCH64_TLSIE_MOVW_GOTTPREL_G1: u32 = 539;
+/// GOT-rel. MOVK 15:0.
+pub const R_AARCH64_TLSIE_MOVW_GOTTPREL_G0_NC: u32 = 540;
+/// Page-rel. ADRP 32:12.
+pub const R_AARCH64_TLSIE_ADR_GOTTPREL_PAGE21: u32 = 541;
+/// Direct LD off. 11:3.
+pub const R_AARCH64_TLSIE_LD64_GOTTPREL_LO12_NC: u32 = 542;
+/// PC-rel. load imm. 20:2.
+pub const R_AARCH64_TLSIE_LD_GOTTPREL_PREL19: u32 = 543;
+/// TLS TP-rel. MOV{N,Z} 47:32.
+pub const R_AARCH64_TLSLE_MOVW_TPREL_G2: u32 = 544;
+/// TLS TP-rel. MOV{N,Z} 31:16.
+pub const R_AARCH64_TLSLE_MOVW_TPREL_G1: u32 = 545;
+/// Likewise; MOVK; no check.
+pub const R_AARCH64_TLSLE_MOVW_TPREL_G1_NC: u32 = 546;
+/// TLS TP-rel. MOV{N,Z} 15:0.
+pub const R_AARCH64_TLSLE_MOVW_TPREL_G0: u32 = 547;
+/// Likewise; MOVK; no check.
+pub const R_AARCH64_TLSLE_MOVW_TPREL_G0_NC: u32 = 548;
+/// TP-rel. ADD imm. 23:12.
+pub const R_AARCH64_TLSLE_ADD_TPREL_HI12: u32 = 549;
+/// TP-rel. ADD imm. 11:0.
+pub const R_AARCH64_TLSLE_ADD_TPREL_LO12: u32 = 550;
+/// Likewise; no ovfl. check.
+pub const R_AARCH64_TLSLE_ADD_TPREL_LO12_NC: u32 = 551;
+/// TP-rel. LD/ST off. 11:0.
+pub const R_AARCH64_TLSLE_LDST8_TPREL_LO12: u32 = 552;
+/// Likewise; no ovfl. check.
+pub const R_AARCH64_TLSLE_LDST8_TPREL_LO12_NC: u32 = 553;
+/// TP-rel. LD/ST off. 11:1.
+pub const R_AARCH64_TLSLE_LDST16_TPREL_LO12: u32 = 554;
+/// Likewise; no check.
+pub const R_AARCH64_TLSLE_LDST16_TPREL_LO12_NC: u32 = 555;
+/// TP-rel. LD/ST off. 11:2.
+pub const R_AARCH64_TLSLE_LDST32_TPREL_LO12: u32 = 556;
+/// Likewise; no check.
+pub const R_AARCH64_TLSLE_LDST32_TPREL_LO12_NC: u32 = 557;
+/// TP-rel. LD/ST off. 11:3.
+pub const R_AARCH64_TLSLE_LDST64_TPREL_LO12: u32 = 558;
+/// Likewise; no check.
+pub const R_AARCH64_TLSLE_LDST64_TPREL_LO12_NC: u32 = 559;
+/// PC-rel. load immediate 20:2.
+pub const R_AARCH64_TLSDESC_LD_PREL19: u32 = 560;
+/// PC-rel. ADR immediate 20:0.
+pub const R_AARCH64_TLSDESC_ADR_PREL21: u32 = 561;
+/// Page-rel. ADRP imm. 32:12.
+pub const R_AARCH64_TLSDESC_ADR_PAGE21: u32 = 562;
+/// Direct LD off. from 11:3.
+pub const R_AARCH64_TLSDESC_LD64_LO12: u32 = 563;
+/// Direct ADD imm. from 11:0.
+pub const R_AARCH64_TLSDESC_ADD_LO12: u32 = 564;
+/// GOT-rel. MOV{N,Z} imm. 31:16.
+pub const R_AARCH64_TLSDESC_OFF_G1: u32 = 565;
+/// GOT-rel. MOVK imm. 15:0; no ck.
+pub const R_AARCH64_TLSDESC_OFF_G0_NC: u32 = 566;
+/// Relax LDR.
+pub const R_AARCH64_TLSDESC_LDR: u32 = 567;
+/// Relax ADD.
+pub const R_AARCH64_TLSDESC_ADD: u32 = 568;
+/// Relax BLR.
+pub const R_AARCH64_TLSDESC_CALL: u32 = 569;
+/// TP-rel. LD/ST off. 11:4.
+pub const R_AARCH64_TLSLE_LDST128_TPREL_LO12: u32 = 570;
+/// Likewise; no check.
+pub const R_AARCH64_TLSLE_LDST128_TPREL_LO12_NC: u32 = 571;
+/// DTP-rel. LD/ST imm. 11:4.
+pub const R_AARCH64_TLSLD_LDST128_DTPREL_LO12: u32 = 572;
+/// Likewise; no check.
+pub const R_AARCH64_TLSLD_LDST128_DTPREL_LO12_NC: u32 = 573;
+/// Copy symbol at runtime.
+pub const R_AARCH64_COPY: u32 = 1024;
+/// Create GOT entry.
+pub const R_AARCH64_GLOB_DAT: u32 = 1025;
+/// Create PLT entry.
+pub const R_AARCH64_JUMP_SLOT: u32 = 1026;
+/// Adjust by program base.
+pub const R_AARCH64_RELATIVE: u32 = 1027;
+/// Module number, 64 bit.
+pub const R_AARCH64_TLS_DTPMOD: u32 = 1028;
+/// Module-relative offset, 64 bit.
+pub const R_AARCH64_TLS_DTPREL: u32 = 1029;
+/// TP-relative offset, 64 bit.
+pub const R_AARCH64_TLS_TPREL: u32 = 1030;
+/// TLS Descriptor.
+pub const R_AARCH64_TLSDESC: u32 = 1031;
+/// STT_GNU_IFUNC relocation.
+pub const R_AARCH64_IRELATIVE: u32 = 1032;
+
+// AVR values for `FileHeader*::e_flags`.
+
+/// Bitmask for `EF_AVR_ARCH_*`.
+pub const EF_AVR_ARCH: u32 = 0x7F;
+
+/// If set, it is assumed that the elf file uses local symbols as reference
+/// for the relocations so that linker relaxation is possible.
+pub const EF_AVR_LINKRELAX_PREPARED: u32 = 0x80;
+
+#[allow(missing_docs)]
+pub const EF_AVR_ARCH_AVR1: u32 = 1;
+#[allow(missing_docs)]
+pub const EF_AVR_ARCH_AVR2: u32 = 2;
+#[allow(missing_docs)]
+pub const EF_AVR_ARCH_AVR25: u32 = 25;
+#[allow(missing_docs)]
+pub const EF_AVR_ARCH_AVR3: u32 = 3;
+#[allow(missing_docs)]
+pub const EF_AVR_ARCH_AVR31: u32 = 31;
+#[allow(missing_docs)]
+pub const EF_AVR_ARCH_AVR35: u32 = 35;
+#[allow(missing_docs)]
+pub const EF_AVR_ARCH_AVR4: u32 = 4;
+#[allow(missing_docs)]
+pub const EF_AVR_ARCH_AVR5: u32 = 5;
+#[allow(missing_docs)]
+pub const EF_AVR_ARCH_AVR51: u32 = 51;
+#[allow(missing_docs)]
+pub const EF_AVR_ARCH_AVR6: u32 = 6;
+#[allow(missing_docs)]
+pub const EF_AVR_ARCH_AVRTINY: u32 = 100;
+#[allow(missing_docs)]
+pub const EF_AVR_ARCH_XMEGA1: u32 = 101;
+#[allow(missing_docs)]
+pub const EF_AVR_ARCH_XMEGA2: u32 = 102;
+#[allow(missing_docs)]
+pub const EF_AVR_ARCH_XMEGA3: u32 = 103;
+#[allow(missing_docs)]
+pub const EF_AVR_ARCH_XMEGA4: u32 = 104;
+#[allow(missing_docs)]
+pub const EF_AVR_ARCH_XMEGA5: u32 = 105;
+#[allow(missing_docs)]
+pub const EF_AVR_ARCH_XMEGA6: u32 = 106;
+#[allow(missing_docs)]
+pub const EF_AVR_ARCH_XMEGA7: u32 = 107;
+
+// AVR values for `Rel*::r_type`.
+
+#[allow(missing_docs)]
+pub const R_AVR_NONE: u32 = 0;
+/// Direct 32 bit
+pub const R_AVR_32: u32 = 1;
+#[allow(missing_docs)]
+pub const R_AVR_7_PCREL: u32 = 2;
+#[allow(missing_docs)]
+pub const R_AVR_13_PCREL: u32 = 3;
+/// Direct 16 bit
+pub const R_AVR_16: u32 = 4;
+#[allow(missing_docs)]
+pub const R_AVR_16_PM: u32 = 5;
+#[allow(missing_docs)]
+pub const R_AVR_LO8_LDI: u32 = 6;
+#[allow(missing_docs)]
+pub const R_AVR_HI8_LDI: u32 = 7;
+#[allow(missing_docs)]
+pub const R_AVR_HH8_LDI: u32 = 8;
+#[allow(missing_docs)]
+pub const R_AVR_LO8_LDI_NEG: u32 = 9;
+#[allow(missing_docs)]
+pub const R_AVR_HI8_LDI_NEG: u32 = 10;
+#[allow(missing_docs)]
+pub const R_AVR_HH8_LDI_NEG: u32 = 11;
+#[allow(missing_docs)]
+pub const R_AVR_LO8_LDI_PM: u32 = 12;
+#[allow(missing_docs)]
+pub const R_AVR_HI8_LDI_PM: u32 = 13;
+#[allow(missing_docs)]
+pub const R_AVR_HH8_LDI_PM: u32 = 14;
+#[allow(missing_docs)]
+pub const R_AVR_LO8_LDI_PM_NEG: u32 = 15;
+#[allow(missing_docs)]
+pub const R_AVR_HI8_LDI_PM_NEG: u32 = 16;
+#[allow(missing_docs)]
+pub const R_AVR_HH8_LDI_PM_NEG: u32 = 17;
+#[allow(missing_docs)]
+pub const R_AVR_CALL: u32 = 18;
+#[allow(missing_docs)]
+pub const R_AVR_LDI: u32 = 19;
+#[allow(missing_docs)]
+pub const R_AVR_6: u32 = 20;
+#[allow(missing_docs)]
+pub const R_AVR_6_ADIW: u32 = 21;
+#[allow(missing_docs)]
+pub const R_AVR_MS8_LDI: u32 = 22;
+#[allow(missing_docs)]
+pub const R_AVR_MS8_LDI_NEG: u32 = 23;
+#[allow(missing_docs)]
+pub const R_AVR_LO8_LDI_GS: u32 = 24;
+#[allow(missing_docs)]
+pub const R_AVR_HI8_LDI_GS: u32 = 25;
+#[allow(missing_docs)]
+pub const R_AVR_8: u32 = 26;
+#[allow(missing_docs)]
+pub const R_AVR_8_LO8: u32 = 27;
+#[allow(missing_docs)]
+pub const R_AVR_8_HI8: u32 = 28;
+#[allow(missing_docs)]
+pub const R_AVR_8_HLO8: u32 = 29;
+#[allow(missing_docs)]
+pub const R_AVR_DIFF8: u32 = 30;
+#[allow(missing_docs)]
+pub const R_AVR_DIFF16: u32 = 31;
+#[allow(missing_docs)]
+pub const R_AVR_DIFF32: u32 = 32;
+#[allow(missing_docs)]
+pub const R_AVR_LDS_STS_16: u32 = 33;
+#[allow(missing_docs)]
+pub const R_AVR_PORT6: u32 = 34;
+#[allow(missing_docs)]
+pub const R_AVR_PORT5: u32 = 35;
+#[allow(missing_docs)]
+pub const R_AVR_32_PCREL: u32 = 36;
+
+// MSP430 values for `Rel*::r_type`.
+
+/// Direct 32 bit
+pub const R_MSP430_32: u32 = 1;
+/// Direct 16 bit
+pub const R_MSP430_16_BYTE: u32 = 5;
+
+// Hexagon values for `Rel*::r_type`.
+
+/// Direct 32 bit
+pub const R_HEX_32: u32 = 6;
+
+// ARM values for `Rel*::r_type`.
+
+/// No reloc
+pub const R_ARM_NONE: u32 = 0;
+/// Deprecated PC relative 26 bit branch.
+pub const R_ARM_PC24: u32 = 1;
+/// Direct 32 bit
+pub const R_ARM_ABS32: u32 = 2;
+/// PC relative 32 bit
+pub const R_ARM_REL32: u32 = 3;
+#[allow(missing_docs)]
+pub const R_ARM_PC13: u32 = 4;
+/// Direct 16 bit
+pub const R_ARM_ABS16: u32 = 5;
+/// Direct 12 bit
+pub const R_ARM_ABS12: u32 = 6;
+/// Direct & 0x7C (LDR, STR).
+pub const R_ARM_THM_ABS5: u32 = 7;
+/// Direct 8 bit
+pub const R_ARM_ABS8: u32 = 8;
+#[allow(missing_docs)]
+pub const R_ARM_SBREL32: u32 = 9;
+/// PC relative 24 bit (Thumb32 BL).
+pub const R_ARM_THM_PC22: u32 = 10;
+/// PC relative & 0x3FC (Thumb16 LDR, ADD, ADR).
+pub const R_ARM_THM_PC8: u32 = 11;
+#[allow(missing_docs)]
+pub const R_ARM_AMP_VCALL9: u32 = 12;
+/// Obsolete static relocation.
+pub const R_ARM_SWI24: u32 = 13;
+/// Dynamic relocation.
+pub const R_ARM_TLS_DESC: u32 = 13;
+/// Reserved.
+pub const R_ARM_THM_SWI8: u32 = 14;
+/// Reserved.
+pub const R_ARM_XPC25: u32 = 15;
+/// Reserved.
+pub const R_ARM_THM_XPC22: u32 = 16;
+/// ID of module containing symbol
+pub const R_ARM_TLS_DTPMOD32: u32 = 17;
+/// Offset in TLS block
+pub const R_ARM_TLS_DTPOFF32: u32 = 18;
+/// Offset in static TLS block
+pub const R_ARM_TLS_TPOFF32: u32 = 19;
+/// Copy symbol at runtime
+pub const R_ARM_COPY: u32 = 20;
+/// Create GOT entry
+pub const R_ARM_GLOB_DAT: u32 = 21;
+/// Create PLT entry
+pub const R_ARM_JUMP_SLOT: u32 = 22;
+/// Adjust by program base
+pub const R_ARM_RELATIVE: u32 = 23;
+/// 32 bit offset to GOT
+pub const R_ARM_GOTOFF: u32 = 24;
+/// 32 bit PC relative offset to GOT
+pub const R_ARM_GOTPC: u32 = 25;
+/// 32 bit GOT entry
+pub const R_ARM_GOT32: u32 = 26;
+/// Deprecated, 32 bit PLT address.
+pub const R_ARM_PLT32: u32 = 27;
+/// PC relative 24 bit (BL, BLX).
+pub const R_ARM_CALL: u32 = 28;
+/// PC relative 24 bit (B, BL<cond>).
+pub const R_ARM_JUMP24: u32 = 29;
+/// PC relative 24 bit (Thumb32 B.W).
+pub const R_ARM_THM_JUMP24: u32 = 30;
+/// Adjust by program base.
+pub const R_ARM_BASE_ABS: u32 = 31;
+/// Obsolete.
+pub const R_ARM_ALU_PCREL_7_0: u32 = 32;
+/// Obsolete.
+pub const R_ARM_ALU_PCREL_15_8: u32 = 33;
+/// Obsolete.
+pub const R_ARM_ALU_PCREL_23_15: u32 = 34;
+/// Deprecated, prog. base relative.
+pub const R_ARM_LDR_SBREL_11_0: u32 = 35;
+/// Deprecated, prog. base relative.
+pub const R_ARM_ALU_SBREL_19_12: u32 = 36;
+/// Deprecated, prog. base relative.
+pub const R_ARM_ALU_SBREL_27_20: u32 = 37;
+#[allow(missing_docs)]
+pub const R_ARM_TARGET1: u32 = 38;
+/// Program base relative.
+pub const R_ARM_SBREL31: u32 = 39;
+#[allow(missing_docs)]
+pub const R_ARM_V4BX: u32 = 40;
+#[allow(missing_docs)]
+pub const R_ARM_TARGET2: u32 = 41;
+/// 32 bit PC relative.
+pub const R_ARM_PREL31: u32 = 42;
+/// Direct 16-bit (MOVW).
+pub const R_ARM_MOVW_ABS_NC: u32 = 43;
+/// Direct high 16-bit (MOVT).
+pub const R_ARM_MOVT_ABS: u32 = 44;
+/// PC relative 16-bit (MOVW).
+pub const R_ARM_MOVW_PREL_NC: u32 = 45;
+/// PC relative (MOVT).
+pub const R_ARM_MOVT_PREL: u32 = 46;
+/// Direct 16 bit (Thumb32 MOVW).
+pub const R_ARM_THM_MOVW_ABS_NC: u32 = 47;
+/// Direct high 16 bit (Thumb32 MOVT).
+pub const R_ARM_THM_MOVT_ABS: u32 = 48;
+/// PC relative 16 bit (Thumb32 MOVW).
+pub const R_ARM_THM_MOVW_PREL_NC: u32 = 49;
+/// PC relative high 16 bit (Thumb32 MOVT).
+pub const R_ARM_THM_MOVT_PREL: u32 = 50;
+/// PC relative 20 bit (Thumb32 B<cond>.W).
+pub const R_ARM_THM_JUMP19: u32 = 51;
+/// PC relative X & 0x7E (Thumb16 CBZ, CBNZ).
+pub const R_ARM_THM_JUMP6: u32 = 52;
+/// PC relative 12 bit (Thumb32 ADR.W).
+pub const R_ARM_THM_ALU_PREL_11_0: u32 = 53;
+/// PC relative 12 bit (Thumb32 LDR{D,SB,H,SH}).
+pub const R_ARM_THM_PC12: u32 = 54;
+/// Direct 32-bit.
+pub const R_ARM_ABS32_NOI: u32 = 55;
+/// PC relative 32-bit.
+pub const R_ARM_REL32_NOI: u32 = 56;
+/// PC relative (ADD, SUB).
+pub const R_ARM_ALU_PC_G0_NC: u32 = 57;
+/// PC relative (ADD, SUB).
+pub const R_ARM_ALU_PC_G0: u32 = 58;
+/// PC relative (ADD, SUB).
+pub const R_ARM_ALU_PC_G1_NC: u32 = 59;
+/// PC relative (ADD, SUB).
+pub const R_ARM_ALU_PC_G1: u32 = 60;
+/// PC relative (ADD, SUB).
+pub const R_ARM_ALU_PC_G2: u32 = 61;
+/// PC relative (LDR,STR,LDRB,STRB).
+pub const R_ARM_LDR_PC_G1: u32 = 62;
+/// PC relative (LDR,STR,LDRB,STRB).
+pub const R_ARM_LDR_PC_G2: u32 = 63;
+/// PC relative (STR{D,H}, LDR{D,SB,H,SH}).
+pub const R_ARM_LDRS_PC_G0: u32 = 64;
+/// PC relative (STR{D,H}, LDR{D,SB,H,SH}).
+pub const R_ARM_LDRS_PC_G1: u32 = 65;
+/// PC relative (STR{D,H}, LDR{D,SB,H,SH}).
+pub const R_ARM_LDRS_PC_G2: u32 = 66;
+/// PC relative (LDC, STC).
+pub const R_ARM_LDC_PC_G0: u32 = 67;
+/// PC relative (LDC, STC).
+pub const R_ARM_LDC_PC_G1: u32 = 68;
+/// PC relative (LDC, STC).
+pub const R_ARM_LDC_PC_G2: u32 = 69;
+/// Program base relative (ADD,SUB).
+pub const R_ARM_ALU_SB_G0_NC: u32 = 70;
+/// Program base relative (ADD,SUB).
+pub const R_ARM_ALU_SB_G0: u32 = 71;
+/// Program base relative (ADD,SUB).
+pub const R_ARM_ALU_SB_G1_NC: u32 = 72;
+/// Program base relative (ADD,SUB).
+pub const R_ARM_ALU_SB_G1: u32 = 73;
+/// Program base relative (ADD,SUB).
+pub const R_ARM_ALU_SB_G2: u32 = 74;
+/// Program base relative (LDR, STR, LDRB, STRB).
+pub const R_ARM_LDR_SB_G0: u32 = 75;
+/// Program base relative (LDR, STR, LDRB, STRB).
+pub const R_ARM_LDR_SB_G1: u32 = 76;
+/// Program base relative (LDR, STR, LDRB, STRB).
+pub const R_ARM_LDR_SB_G2: u32 = 77;
+/// Program base relative (LDR, STR, LDRB, STRB).
+pub const R_ARM_LDRS_SB_G0: u32 = 78;
+/// Program base relative (LDR, STR, LDRB, STRB).
+pub const R_ARM_LDRS_SB_G1: u32 = 79;
+/// Program base relative (LDR, STR, LDRB, STRB).
+pub const R_ARM_LDRS_SB_G2: u32 = 80;
+/// Program base relative (LDC,STC).
+pub const R_ARM_LDC_SB_G0: u32 = 81;
+/// Program base relative (LDC,STC).
+pub const R_ARM_LDC_SB_G1: u32 = 82;
+/// Program base relative (LDC,STC).
+pub const R_ARM_LDC_SB_G2: u32 = 83;
+/// Program base relative 16 bit (MOVW).
+pub const R_ARM_MOVW_BREL_NC: u32 = 84;
+/// Program base relative high 16 bit (MOVT).
+pub const R_ARM_MOVT_BREL: u32 = 85;
+/// Program base relative 16 bit (MOVW).
+pub const R_ARM_MOVW_BREL: u32 = 86;
+/// Program base relative 16 bit (Thumb32 MOVW).
+pub const R_ARM_THM_MOVW_BREL_NC: u32 = 87;
+/// Program base relative high 16 bit (Thumb32 MOVT).
+pub const R_ARM_THM_MOVT_BREL: u32 = 88;
+/// Program base relative 16 bit (Thumb32 MOVW).
+pub const R_ARM_THM_MOVW_BREL: u32 = 89;
+#[allow(missing_docs)]
+pub const R_ARM_TLS_GOTDESC: u32 = 90;
+#[allow(missing_docs)]
+pub const R_ARM_TLS_CALL: u32 = 91;
+/// TLS relaxation.
+pub const R_ARM_TLS_DESCSEQ: u32 = 92;
+#[allow(missing_docs)]
+pub const R_ARM_THM_TLS_CALL: u32 = 93;
+#[allow(missing_docs)]
+pub const R_ARM_PLT32_ABS: u32 = 94;
+/// GOT entry.
+pub const R_ARM_GOT_ABS: u32 = 95;
+/// PC relative GOT entry.
+pub const R_ARM_GOT_PREL: u32 = 96;
+/// GOT entry relative to GOT origin (LDR).
+pub const R_ARM_GOT_BREL12: u32 = 97;
+/// 12 bit, GOT entry relative to GOT origin (LDR, STR).
+pub const R_ARM_GOTOFF12: u32 = 98;
+#[allow(missing_docs)]
+pub const R_ARM_GOTRELAX: u32 = 99;
+#[allow(missing_docs)]
+pub const R_ARM_GNU_VTENTRY: u32 = 100;
+#[allow(missing_docs)]
+pub const R_ARM_GNU_VTINHERIT: u32 = 101;
+/// PC relative & 0xFFE (Thumb16 B).
+pub const R_ARM_THM_PC11: u32 = 102;
+/// PC relative & 0x1FE (Thumb16 B/B<cond>).
+pub const R_ARM_THM_PC9: u32 = 103;
+/// PC-rel 32 bit for global dynamic thread local data
+pub const R_ARM_TLS_GD32: u32 = 104;
+/// PC-rel 32 bit for local dynamic thread local data
+pub const R_ARM_TLS_LDM32: u32 = 105;
+/// 32 bit offset relative to TLS block
+pub const R_ARM_TLS_LDO32: u32 = 106;
+/// PC-rel 32 bit for GOT entry of static TLS block offset
+pub const R_ARM_TLS_IE32: u32 = 107;
+/// 32 bit offset relative to static TLS block
+pub const R_ARM_TLS_LE32: u32 = 108;
+/// 12 bit relative to TLS block (LDR, STR).
+pub const R_ARM_TLS_LDO12: u32 = 109;
+/// 12 bit relative to static TLS block (LDR, STR).
+pub const R_ARM_TLS_LE12: u32 = 110;
+/// 12 bit GOT entry relative to GOT origin (LDR).
+pub const R_ARM_TLS_IE12GP: u32 = 111;
+/// Obsolete.
+pub const R_ARM_ME_TOO: u32 = 128;
+#[allow(missing_docs)]
+pub const R_ARM_THM_TLS_DESCSEQ: u32 = 129;
+#[allow(missing_docs)]
+pub const R_ARM_THM_TLS_DESCSEQ16: u32 = 129;
+#[allow(missing_docs)]
+pub const R_ARM_THM_TLS_DESCSEQ32: u32 = 130;
+/// GOT entry relative to GOT origin, 12 bit (Thumb32 LDR).
+pub const R_ARM_THM_GOT_BREL12: u32 = 131;
+#[allow(missing_docs)]
+pub const R_ARM_IRELATIVE: u32 = 160;
+#[allow(missing_docs)]
+pub const R_ARM_RXPC25: u32 = 249;
+#[allow(missing_docs)]
+pub const R_ARM_RSBREL32: u32 = 250;
+#[allow(missing_docs)]
+pub const R_ARM_THM_RPC22: u32 = 251;
+#[allow(missing_docs)]
+pub const R_ARM_RREL32: u32 = 252;
+#[allow(missing_docs)]
+pub const R_ARM_RABS22: u32 = 253;
+#[allow(missing_docs)]
+pub const R_ARM_RPC24: u32 = 254;
+#[allow(missing_docs)]
+pub const R_ARM_RBASE: u32 = 255;
+
+// C-SKY values for `Rel*::r_type`.
+/// no reloc
+pub const R_CKCORE_NONE: u32 = 0;
+/// direct 32 bit (S + A)
+pub const R_CKCORE_ADDR32: u32 = 1;
+/// disp ((S + A - P) >> 2) & 0xff
+pub const R_CKCORE_PCRELIMM8BY4: u32 = 2;
+/// disp ((S + A - P) >> 1) & 0x7ff
+pub const R_CKCORE_PCRELIMM11BY2: u32 = 3;
+/// 32-bit rel (S + A - P)
+pub const R_CKCORE_PCREL32: u32 = 5;
+/// disp ((S + A - P) >>1) & 0x7ff
+pub const R_CKCORE_PCRELJSR_IMM11BY2: u32 = 6;
+/// 32 bit adjust program base(B + A)
+pub const R_CKCORE_RELATIVE: u32 = 9;
+/// 32 bit adjust by program base
+pub const R_CKCORE_COPY: u32 = 10;
+/// off between got and sym (S)
+pub const R_CKCORE_GLOB_DAT: u32 = 11;
+/// PLT entry (S)
+pub const R_CKCORE_JUMP_SLOT: u32 = 12;
+/// offset to GOT (S + A - GOT)
+pub const R_CKCORE_GOTOFF: u32 = 13;
+/// PC offset to GOT (GOT + A - P)
+pub const R_CKCORE_GOTPC: u32 = 14;
+/// 32 bit GOT entry (G)
+pub const R_CKCORE_GOT32: u32 = 15;
+/// 32 bit PLT entry (G)
+pub const R_CKCORE_PLT32: u32 = 16;
+/// GOT entry in GLOB_DAT (GOT + G)
+pub const R_CKCORE_ADDRGOT: u32 = 17;
+/// PLT entry in GLOB_DAT (GOT + G)
+pub const R_CKCORE_ADDRPLT: u32 = 18;
+/// ((S + A - P) >> 1) & 0x3ff_ffff
+pub const R_CKCORE_PCREL_IMM26BY2: u32 = 19;
+/// disp ((S + A - P) >> 1) & 0xffff
+pub const R_CKCORE_PCREL_IMM16BY2: u32 = 20;
+/// disp ((S + A - P) >> 2) & 0xffff
+pub const R_CKCORE_PCREL_IMM16BY4: u32 = 21;
+/// disp ((S + A - P) >> 1) & 0x3ff
+pub const R_CKCORE_PCREL_IMM10BY2: u32 = 22;
+/// disp ((S + A - P) >> 2) & 0x3ff
+pub const R_CKCORE_PCREL_IMM10BY4: u32 = 23;
+/// high & low 16 bit ADDR, ((S + A) >> 16) & 0xffff
+pub const R_CKCORE_ADDR_HI16: u32 = 24;
+/// (S + A) & 0xffff
+pub const R_CKCORE_ADDR_LO16: u32 = 25;
+/// high & low 16 bit GOTPC, ((GOT + A - P) >> 16) & 0xffff
+pub const R_CKCORE_GOTPC_HI16: u32 = 26;
+/// (GOT + A - P) & 0xffff
+pub const R_CKCORE_GOTPC_LO16: u32 = 27;
+/// high & low 16 bit GOTOFF, ((S + A - GOT) >> 16) & 0xffff
+pub const R_CKCORE_GOTOFF_HI16: u32 = 28;
+/// (S + A - GOT) & 0xffff
+pub const R_CKCORE_GOTOFF_LO16: u32 = 29;
+/// 12 bit disp GOT entry (G)
+pub const R_CKCORE_GOT12: u32 = 30;
+/// high & low 16 bit GOT, (G >> 16) & 0xffff
+pub const R_CKCORE_GOT_HI16: u32 = 31;
+/// (G & 0xffff)
+pub const R_CKCORE_GOT_LO16: u32 = 32;
+/// 12 bit disp PLT entry (G)
+pub const R_CKCORE_PLT12: u32 = 33;
+/// high & low 16 bit PLT, (G >> 16) & 0xffff
+pub const R_CKCORE_PLT_HI16: u32 = 34;
+/// G & 0xffff
+pub const R_CKCORE_PLT_LO16: u32 = 35;
+/// high & low 16 bit ADDRGOT, (GOT + G * 4) & 0xffff
+pub const R_CKCORE_ADDRGOT_HI16: u32 = 36;
+/// (GOT + G * 4) & 0xffff
+pub const R_CKCORE_ADDRGOT_LO16: u32 = 37;
+/// high & low 16 bit ADDRPLT, ((GOT + G * 4) >> 16) & 0xFFFF
+pub const R_CKCORE_ADDRPLT_HI16: u32 = 38;
+/// (GOT+G*4) & 0xffff
+pub const R_CKCORE_ADDRPLT_LO16: u32 = 39;
+/// disp ((S+A-P) >>1) & x3ff_ffff
+pub const R_CKCORE_PCREL_JSR_IMM26BY2: u32 = 40;
+/// (S+A-BTEXT) & 0xffff
+pub const R_CKCORE_TOFFSET_LO16: u32 = 41;
+/// (S+A-BTEXT) & 0xffff
+pub const R_CKCORE_DOFFSET_LO16: u32 = 42;
+/// disp ((S+A-P) >>1) & 0x3ffff
+pub const R_CKCORE_PCREL_IMM18BY2: u32 = 43;
+/// disp (S+A-BDATA) & 0x3ffff
+pub const R_CKCORE_DOFFSET_IMM18: u32 = 44;
+/// disp ((S+A-BDATA)>>1) & 0x3ffff
+pub const R_CKCORE_DOFFSET_IMM18BY2: u32 = 45;
+/// disp ((S+A-BDATA)>>2) & 0x3ffff
+pub const R_CKCORE_DOFFSET_IMM18BY4: u32 = 46;
+/// disp (G >> 2)
+pub const R_CKCORE_GOT_IMM18BY4: u32 = 48;
+/// disp (G >> 2)
+pub const R_CKCORE_PLT_IMM18BY4: u32 = 49;
+/// disp ((S+A-P) >>2) & 0x7f
+pub const R_CKCORE_PCREL_IMM7BY4: u32 = 50;
+/// 32 bit offset to TLS block
+pub const R_CKCORE_TLS_LE32: u32 = 51;
+#[allow(missing_docs)]
+pub const R_CKCORE_TLS_IE32: u32 = 52;
+#[allow(missing_docs)]
+pub const R_CKCORE_TLS_GD32: u32 = 53;
+#[allow(missing_docs)]
+pub const R_CKCORE_TLS_LDM32: u32 = 54;
+#[allow(missing_docs)]
+pub const R_CKCORE_TLS_LDO32: u32 = 55;
+#[allow(missing_docs)]
+pub const R_CKCORE_TLS_DTPMOD32: u32 = 56;
+#[allow(missing_docs)]
+pub const R_CKCORE_TLS_DTPOFF32: u32 = 57;
+#[allow(missing_docs)]
+pub const R_CKCORE_TLS_TPOFF32: u32 = 58;
+
+// C-SKY values for `FileHeader*::e_flags`.
+#[allow(missing_docs)]
+pub const EF_CSKY_ABIMASK: u32 = 0xF000_0000;
+#[allow(missing_docs)]
+pub const EF_CSKY_OTHER: u32 = 0x0FFF_0000;
+#[allow(missing_docs)]
+pub const EF_CSKY_PROCESSOR: u32 = 0x0000_FFFF;
+
+#[allow(missing_docs)]
+pub const EF_CSKY_ABIV1: u32 = 0x1000_0000;
+#[allow(missing_docs)]
+pub const EF_CSKY_ABIV2: u32 = 0x2000_0000;
+
+// C-SKY values for `SectionHeader*::sh_type`.
+/// C-SKY attributes section.
+pub const SHT_CSKY_ATTRIBUTES: u32 = SHT_LOPROC + 1;
+
+// IA-64 specific declarations.
+
+// IA-64 values for `FileHeader64::e_flags`.
+/// os-specific flags
+pub const EF_IA_64_MASKOS: u32 = 0x0000_000f;
+/// 64-bit ABI
+pub const EF_IA_64_ABI64: u32 = 0x0000_0010;
+/// arch. version mask
+pub const EF_IA_64_ARCH: u32 = 0xff00_0000;
+
+// IA-64 values for `ProgramHeader64::p_type`.
+/// arch extension bits
+pub const PT_IA_64_ARCHEXT: u32 = PT_LOPROC + 0;
+/// ia64 unwind bits
+pub const PT_IA_64_UNWIND: u32 = PT_LOPROC + 1;
+#[allow(missing_docs)]
+pub const PT_IA_64_HP_OPT_ANOT: u32 = PT_LOOS + 0x12;
+#[allow(missing_docs)]
+pub const PT_IA_64_HP_HSL_ANOT: u32 = PT_LOOS + 0x13;
+#[allow(missing_docs)]
+pub const PT_IA_64_HP_STACK: u32 = PT_LOOS + 0x14;
+
+// IA-64 values for `ProgramHeader64::p_flags`.
+/// spec insns w/o recovery
+pub const PF_IA_64_NORECOV: u32 = 0x8000_0000;
+
+// IA-64 values for `SectionHeader64::sh_type`.
+/// extension bits
+pub const SHT_IA_64_EXT: u32 = SHT_LOPROC + 0;
+/// unwind bits
+pub const SHT_IA_64_UNWIND: u32 = SHT_LOPROC + 1;
+
+// IA-64 values for `SectionHeader64::sh_flags`.
+/// section near gp
+pub const SHF_IA_64_SHORT: u32 = 0x1000_0000;
+/// spec insns w/o recovery
+pub const SHF_IA_64_NORECOV: u32 = 0x2000_0000;
+
+// IA-64 values for `Dyn64::d_tag`.
+#[allow(missing_docs)]
+pub const DT_IA_64_PLT_RESERVE: u32 = DT_LOPROC + 0;
+
+// IA-64 values for `Rel*::r_type`.
+/// none
+pub const R_IA64_NONE: u32 = 0x00;
+/// symbol + addend, add imm14
+pub const R_IA64_IMM14: u32 = 0x21;
+/// symbol + addend, add imm22
+pub const R_IA64_IMM22: u32 = 0x22;
+/// symbol + addend, mov imm64
+pub const R_IA64_IMM64: u32 = 0x23;
+/// symbol + addend, data4 MSB
+pub const R_IA64_DIR32MSB: u32 = 0x24;
+/// symbol + addend, data4 LSB
+pub const R_IA64_DIR32LSB: u32 = 0x25;
+/// symbol + addend, data8 MSB
+pub const R_IA64_DIR64MSB: u32 = 0x26;
+/// symbol + addend, data8 LSB
+pub const R_IA64_DIR64LSB: u32 = 0x27;
+/// @gprel(sym + add), add imm22
+pub const R_IA64_GPREL22: u32 = 0x2a;
+/// @gprel(sym + add), mov imm64
+pub const R_IA64_GPREL64I: u32 = 0x2b;
+/// @gprel(sym + add), data4 MSB
+pub const R_IA64_GPREL32MSB: u32 = 0x2c;
+/// @gprel(sym + add), data4 LSB
+pub const R_IA64_GPREL32LSB: u32 = 0x2d;
+/// @gprel(sym + add), data8 MSB
+pub const R_IA64_GPREL64MSB: u32 = 0x2e;
+/// @gprel(sym + add), data8 LSB
+pub const R_IA64_GPREL64LSB: u32 = 0x2f;
+/// @ltoff(sym + add), add imm22
+pub const R_IA64_LTOFF22: u32 = 0x32;
+/// @ltoff(sym + add), mov imm64
+pub const R_IA64_LTOFF64I: u32 = 0x33;
+/// @pltoff(sym + add), add imm22
+pub const R_IA64_PLTOFF22: u32 = 0x3a;
+/// @pltoff(sym + add), mov imm64
+pub const R_IA64_PLTOFF64I: u32 = 0x3b;
+/// @pltoff(sym + add), data8 MSB
+pub const R_IA64_PLTOFF64MSB: u32 = 0x3e;
+/// @pltoff(sym + add), data8 LSB
+pub const R_IA64_PLTOFF64LSB: u32 = 0x3f;
+/// @fptr(sym + add), mov imm64
+pub const R_IA64_FPTR64I: u32 = 0x43;
+/// @fptr(sym + add), data4 MSB
+pub const R_IA64_FPTR32MSB: u32 = 0x44;
+/// @fptr(sym + add), data4 LSB
+pub const R_IA64_FPTR32LSB: u32 = 0x45;
+/// @fptr(sym + add), data8 MSB
+pub const R_IA64_FPTR64MSB: u32 = 0x46;
+/// @fptr(sym + add), data8 LSB
+pub const R_IA64_FPTR64LSB: u32 = 0x47;
+/// @pcrel(sym + add), brl
+pub const R_IA64_PCREL60B: u32 = 0x48;
+/// @pcrel(sym + add), ptb, call
+pub const R_IA64_PCREL21B: u32 = 0x49;
+/// @pcrel(sym + add), chk.s
+pub const R_IA64_PCREL21M: u32 = 0x4a;
+/// @pcrel(sym + add), fchkf
+pub const R_IA64_PCREL21F: u32 = 0x4b;
+/// @pcrel(sym + add), data4 MSB
+pub const R_IA64_PCREL32MSB: u32 = 0x4c;
+/// @pcrel(sym + add), data4 LSB
+pub const R_IA64_PCREL32LSB: u32 = 0x4d;
+/// @pcrel(sym + add), data8 MSB
+pub const R_IA64_PCREL64MSB: u32 = 0x4e;
+/// @pcrel(sym + add), data8 LSB
+pub const R_IA64_PCREL64LSB: u32 = 0x4f;
+/// @ltoff(@fptr(s+a)), imm22
+pub const R_IA64_LTOFF_FPTR22: u32 = 0x52;
+/// @ltoff(@fptr(s+a)), imm64
+pub const R_IA64_LTOFF_FPTR64I: u32 = 0x53;
+/// @ltoff(@fptr(s+a)), data4 MSB
+pub const R_IA64_LTOFF_FPTR32MSB: u32 = 0x54;
+/// @ltoff(@fptr(s+a)), data4 LSB
+pub const R_IA64_LTOFF_FPTR32LSB: u32 = 0x55;
+/// @ltoff(@fptr(s+a)), data8 MSB
+pub const R_IA64_LTOFF_FPTR64MSB: u32 = 0x56;
+/// @ltoff(@fptr(s+a)), data8 LSB
+pub const R_IA64_LTOFF_FPTR64LSB: u32 = 0x57;
+/// @segrel(sym + add), data4 MSB
+pub const R_IA64_SEGREL32MSB: u32 = 0x5c;
+/// @segrel(sym + add), data4 LSB
+pub const R_IA64_SEGREL32LSB: u32 = 0x5d;
+/// @segrel(sym + add), data8 MSB
+pub const R_IA64_SEGREL64MSB: u32 = 0x5e;
+/// @segrel(sym + add), data8 LSB
+pub const R_IA64_SEGREL64LSB: u32 = 0x5f;
+/// @secrel(sym + add), data4 MSB
+pub const R_IA64_SECREL32MSB: u32 = 0x64;
+/// @secrel(sym + add), data4 LSB
+pub const R_IA64_SECREL32LSB: u32 = 0x65;
+/// @secrel(sym + add), data8 MSB
+pub const R_IA64_SECREL64MSB: u32 = 0x66;
+/// @secrel(sym + add), data8 LSB
+pub const R_IA64_SECREL64LSB: u32 = 0x67;
+/// data 4 + REL
+pub const R_IA64_REL32MSB: u32 = 0x6c;
+/// data 4 + REL
+pub const R_IA64_REL32LSB: u32 = 0x6d;
+/// data 8 + REL
+pub const R_IA64_REL64MSB: u32 = 0x6e;
+/// data 8 + REL
+pub const R_IA64_REL64LSB: u32 = 0x6f;
+/// symbol + addend, data4 MSB
+pub const R_IA64_LTV32MSB: u32 = 0x74;
+/// symbol + addend, data4 LSB
+pub const R_IA64_LTV32LSB: u32 = 0x75;
+/// symbol + addend, data8 MSB
+pub const R_IA64_LTV64MSB: u32 = 0x76;
+/// symbol + addend, data8 LSB
+pub const R_IA64_LTV64LSB: u32 = 0x77;
+/// @pcrel(sym + add), 21bit inst
+pub const R_IA64_PCREL21BI: u32 = 0x79;
+/// @pcrel(sym + add), 22bit inst
+pub const R_IA64_PCREL22: u32 = 0x7a;
+/// @pcrel(sym + add), 64bit inst
+pub const R_IA64_PCREL64I: u32 = 0x7b;
+/// dynamic reloc, imported PLT, MSB
+pub const R_IA64_IPLTMSB: u32 = 0x80;
+/// dynamic reloc, imported PLT, LSB
+pub const R_IA64_IPLTLSB: u32 = 0x81;
+/// copy relocation
+pub const R_IA64_COPY: u32 = 0x84;
+/// Addend and symbol difference
+pub const R_IA64_SUB: u32 = 0x85;
+/// LTOFF22, relaxable.
+pub const R_IA64_LTOFF22X: u32 = 0x86;
+/// Use of LTOFF22X.
+pub const R_IA64_LDXMOV: u32 = 0x87;
+/// @tprel(sym + add), imm14
+pub const R_IA64_TPREL14: u32 = 0x91;
+/// @tprel(sym + add), imm22
+pub const R_IA64_TPREL22: u32 = 0x92;
+/// @tprel(sym + add), imm64
+pub const R_IA64_TPREL64I: u32 = 0x93;
+/// @tprel(sym + add), data8 MSB
+pub const R_IA64_TPREL64MSB: u32 = 0x96;
+/// @tprel(sym + add), data8 LSB
+pub const R_IA64_TPREL64LSB: u32 = 0x97;
+/// @ltoff(@tprel(s+a)), imm2
+pub const R_IA64_LTOFF_TPREL22: u32 = 0x9a;
+/// @dtpmod(sym + add), data8 MSB
+pub const R_IA64_DTPMOD64MSB: u32 = 0xa6;
+/// @dtpmod(sym + add), data8 LSB
+pub const R_IA64_DTPMOD64LSB: u32 = 0xa7;
+/// @ltoff(@dtpmod(sym + add)), imm22
+pub const R_IA64_LTOFF_DTPMOD22: u32 = 0xaa;
+/// @dtprel(sym + add), imm14
+pub const R_IA64_DTPREL14: u32 = 0xb1;
+/// @dtprel(sym + add), imm22
+pub const R_IA64_DTPREL22: u32 = 0xb2;
+/// @dtprel(sym + add), imm64
+pub const R_IA64_DTPREL64I: u32 = 0xb3;
+/// @dtprel(sym + add), data4 MSB
+pub const R_IA64_DTPREL32MSB: u32 = 0xb4;
+/// @dtprel(sym + add), data4 LSB
+pub const R_IA64_DTPREL32LSB: u32 = 0xb5;
+/// @dtprel(sym + add), data8 MSB
+pub const R_IA64_DTPREL64MSB: u32 = 0xb6;
+/// @dtprel(sym + add), data8 LSB
+pub const R_IA64_DTPREL64LSB: u32 = 0xb7;
+/// @ltoff(@dtprel(s+a)), imm22
+pub const R_IA64_LTOFF_DTPREL22: u32 = 0xba;
+
+// SH specific declarations.
+
+// SH values `FileHeader*::e_flags`.
+#[allow(missing_docs)]
+pub const EF_SH_MACH_MASK: u32 = 0x1f;
+#[allow(missing_docs)]
+pub const EF_SH_UNKNOWN: u32 = 0x0;
+#[allow(missing_docs)]
+pub const EF_SH1: u32 = 0x1;
+#[allow(missing_docs)]
+pub const EF_SH2: u32 = 0x2;
+#[allow(missing_docs)]
+pub const EF_SH3: u32 = 0x3;
+#[allow(missing_docs)]
+pub const EF_SH_DSP: u32 = 0x4;
+#[allow(missing_docs)]
+pub const EF_SH3_DSP: u32 = 0x5;
+#[allow(missing_docs)]
+pub const EF_SH4AL_DSP: u32 = 0x6;
+#[allow(missing_docs)]
+pub const EF_SH3E: u32 = 0x8;
+#[allow(missing_docs)]
+pub const EF_SH4: u32 = 0x9;
+#[allow(missing_docs)]
+pub const EF_SH2E: u32 = 0xb;
+#[allow(missing_docs)]
+pub const EF_SH4A: u32 = 0xc;
+#[allow(missing_docs)]
+pub const EF_SH2A: u32 = 0xd;
+#[allow(missing_docs)]
+pub const EF_SH4_NOFPU: u32 = 0x10;
+#[allow(missing_docs)]
+pub const EF_SH4A_NOFPU: u32 = 0x11;
+#[allow(missing_docs)]
+pub const EF_SH4_NOMMU_NOFPU: u32 = 0x12;
+#[allow(missing_docs)]
+pub const EF_SH2A_NOFPU: u32 = 0x13;
+#[allow(missing_docs)]
+pub const EF_SH3_NOMMU: u32 = 0x14;
+#[allow(missing_docs)]
+pub const EF_SH2A_SH4_NOFPU: u32 = 0x15;
+#[allow(missing_docs)]
+pub const EF_SH2A_SH3_NOFPU: u32 = 0x16;
+#[allow(missing_docs)]
+pub const EF_SH2A_SH4: u32 = 0x17;
+#[allow(missing_docs)]
+pub const EF_SH2A_SH3E: u32 = 0x18;
+
+// SH values `Rel*::r_type`.
+#[allow(missing_docs)]
+pub const R_SH_NONE: u32 = 0;
+#[allow(missing_docs)]
+pub const R_SH_DIR32: u32 = 1;
+#[allow(missing_docs)]
+pub const R_SH_REL32: u32 = 2;
+#[allow(missing_docs)]
+pub const R_SH_DIR8WPN: u32 = 3;
+#[allow(missing_docs)]
+pub const R_SH_IND12W: u32 = 4;
+#[allow(missing_docs)]
+pub const R_SH_DIR8WPL: u32 = 5;
+#[allow(missing_docs)]
+pub const R_SH_DIR8WPZ: u32 = 6;
+#[allow(missing_docs)]
+pub const R_SH_DIR8BP: u32 = 7;
+#[allow(missing_docs)]
+pub const R_SH_DIR8W: u32 = 8;
+#[allow(missing_docs)]
+pub const R_SH_DIR8L: u32 = 9;
+#[allow(missing_docs)]
+pub const R_SH_SWITCH16: u32 = 25;
+#[allow(missing_docs)]
+pub const R_SH_SWITCH32: u32 = 26;
+#[allow(missing_docs)]
+pub const R_SH_USES: u32 = 27;
+#[allow(missing_docs)]
+pub const R_SH_COUNT: u32 = 28;
+#[allow(missing_docs)]
+pub const R_SH_ALIGN: u32 = 29;
+#[allow(missing_docs)]
+pub const R_SH_CODE: u32 = 30;
+#[allow(missing_docs)]
+pub const R_SH_DATA: u32 = 31;
+#[allow(missing_docs)]
+pub const R_SH_LABEL: u32 = 32;
+#[allow(missing_docs)]
+pub const R_SH_SWITCH8: u32 = 33;
+#[allow(missing_docs)]
+pub const R_SH_GNU_VTINHERIT: u32 = 34;
+#[allow(missing_docs)]
+pub const R_SH_GNU_VTENTRY: u32 = 35;
+#[allow(missing_docs)]
+pub const R_SH_TLS_GD_32: u32 = 144;
+#[allow(missing_docs)]
+pub const R_SH_TLS_LD_32: u32 = 145;
+#[allow(missing_docs)]
+pub const R_SH_TLS_LDO_32: u32 = 146;
+#[allow(missing_docs)]
+pub const R_SH_TLS_IE_32: u32 = 147;
+#[allow(missing_docs)]
+pub const R_SH_TLS_LE_32: u32 = 148;
+#[allow(missing_docs)]
+pub const R_SH_TLS_DTPMOD32: u32 = 149;
+#[allow(missing_docs)]
+pub const R_SH_TLS_DTPOFF32: u32 = 150;
+#[allow(missing_docs)]
+pub const R_SH_TLS_TPOFF32: u32 = 151;
+#[allow(missing_docs)]
+pub const R_SH_GOT32: u32 = 160;
+#[allow(missing_docs)]
+pub const R_SH_PLT32: u32 = 161;
+#[allow(missing_docs)]
+pub const R_SH_COPY: u32 = 162;
+#[allow(missing_docs)]
+pub const R_SH_GLOB_DAT: u32 = 163;
+#[allow(missing_docs)]
+pub const R_SH_JMP_SLOT: u32 = 164;
+#[allow(missing_docs)]
+pub const R_SH_RELATIVE: u32 = 165;
+#[allow(missing_docs)]
+pub const R_SH_GOTOFF: u32 = 166;
+#[allow(missing_docs)]
+pub const R_SH_GOTPC: u32 = 167;
+
+// S/390 specific definitions.
+
+// S/390 values `FileHeader*::e_flags`.
+
+/// High GPRs kernel facility needed.
+pub const EF_S390_HIGH_GPRS: u32 = 0x0000_0001;
+
+// S/390 values `Rel*::r_type`.
+
+/// No reloc.
+pub const R_390_NONE: u32 = 0;
+/// Direct 8 bit.
+pub const R_390_8: u32 = 1;
+/// Direct 12 bit.
+pub const R_390_12: u32 = 2;
+/// Direct 16 bit.
+pub const R_390_16: u32 = 3;
+/// Direct 32 bit.
+pub const R_390_32: u32 = 4;
+/// PC relative 32 bit.
+pub const R_390_PC32: u32 = 5;
+/// 12 bit GOT offset.
+pub const R_390_GOT12: u32 = 6;
+/// 32 bit GOT offset.
+pub const R_390_GOT32: u32 = 7;
+/// 32 bit PC relative PLT address.
+pub const R_390_PLT32: u32 = 8;
+/// Copy symbol at runtime.
+pub const R_390_COPY: u32 = 9;
+/// Create GOT entry.
+pub const R_390_GLOB_DAT: u32 = 10;
+/// Create PLT entry.
+pub const R_390_JMP_SLOT: u32 = 11;
+/// Adjust by program base.
+pub const R_390_RELATIVE: u32 = 12;
+/// 32 bit offset to GOT.
+pub const R_390_GOTOFF32: u32 = 13;
+/// 32 bit PC relative offset to GOT.
+pub const R_390_GOTPC: u32 = 14;
+/// 16 bit GOT offset.
+pub const R_390_GOT16: u32 = 15;
+/// PC relative 16 bit.
+pub const R_390_PC16: u32 = 16;
+/// PC relative 16 bit shifted by 1.
+pub const R_390_PC16DBL: u32 = 17;
+/// 16 bit PC rel. PLT shifted by 1.
+pub const R_390_PLT16DBL: u32 = 18;
+/// PC relative 32 bit shifted by 1.
+pub const R_390_PC32DBL: u32 = 19;
+/// 32 bit PC rel. PLT shifted by 1.
+pub const R_390_PLT32DBL: u32 = 20;
+/// 32 bit PC rel. GOT shifted by 1.
+pub const R_390_GOTPCDBL: u32 = 21;
+/// Direct 64 bit.
+pub const R_390_64: u32 = 22;
+/// PC relative 64 bit.
+pub const R_390_PC64: u32 = 23;
+/// 64 bit GOT offset.
+pub const R_390_GOT64: u32 = 24;
+/// 64 bit PC relative PLT address.
+pub const R_390_PLT64: u32 = 25;
+/// 32 bit PC rel. to GOT entry >> 1.
+pub const R_390_GOTENT: u32 = 26;
+/// 16 bit offset to GOT.
+pub const R_390_GOTOFF16: u32 = 27;
+/// 64 bit offset to GOT.
+pub const R_390_GOTOFF64: u32 = 28;
+/// 12 bit offset to jump slot.
+pub const R_390_GOTPLT12: u32 = 29;
+/// 16 bit offset to jump slot.
+pub const R_390_GOTPLT16: u32 = 30;
+/// 32 bit offset to jump slot.
+pub const R_390_GOTPLT32: u32 = 31;
+/// 64 bit offset to jump slot.
+pub const R_390_GOTPLT64: u32 = 32;
+/// 32 bit rel. offset to jump slot.
+pub const R_390_GOTPLTENT: u32 = 33;
+/// 16 bit offset from GOT to PLT.
+pub const R_390_PLTOFF16: u32 = 34;
+/// 32 bit offset from GOT to PLT.
+pub const R_390_PLTOFF32: u32 = 35;
+/// 16 bit offset from GOT to PLT.
+pub const R_390_PLTOFF64: u32 = 36;
+/// Tag for load insn in TLS code.
+pub const R_390_TLS_LOAD: u32 = 37;
+/// Tag for function call in general dynamic TLS code.
+pub const R_390_TLS_GDCALL: u32 = 38;
+/// Tag for function call in local dynamic TLS code.
+pub const R_390_TLS_LDCALL: u32 = 39;
+/// Direct 32 bit for general dynamic thread local data.
+pub const R_390_TLS_GD32: u32 = 40;
+/// Direct 64 bit for general dynamic thread local data.
+pub const R_390_TLS_GD64: u32 = 41;
+/// 12 bit GOT offset for static TLS block offset.
+pub const R_390_TLS_GOTIE12: u32 = 42;
+/// 32 bit GOT offset for static TLS block offset.
+pub const R_390_TLS_GOTIE32: u32 = 43;
+/// 64 bit GOT offset for static TLS block offset.
+pub const R_390_TLS_GOTIE64: u32 = 44;
+/// Direct 32 bit for local dynamic thread local data in LE code.
+pub const R_390_TLS_LDM32: u32 = 45;
+/// Direct 64 bit for local dynamic thread local data in LE code.
+pub const R_390_TLS_LDM64: u32 = 46;
+/// 32 bit address of GOT entry for negated static TLS block offset.
+pub const R_390_TLS_IE32: u32 = 47;
+/// 64 bit address of GOT entry for negated static TLS block offset.
+pub const R_390_TLS_IE64: u32 = 48;
+/// 32 bit rel. offset to GOT entry for negated static TLS block offset.
+pub const R_390_TLS_IEENT: u32 = 49;
+/// 32 bit negated offset relative to static TLS block.
+pub const R_390_TLS_LE32: u32 = 50;
+/// 64 bit negated offset relative to static TLS block.
+pub const R_390_TLS_LE64: u32 = 51;
+/// 32 bit offset relative to TLS block.
+pub const R_390_TLS_LDO32: u32 = 52;
+/// 64 bit offset relative to TLS block.
+pub const R_390_TLS_LDO64: u32 = 53;
+/// ID of module containing symbol.
+pub const R_390_TLS_DTPMOD: u32 = 54;
+/// Offset in TLS block.
+pub const R_390_TLS_DTPOFF: u32 = 55;
+/// Negated offset in static TLS block.
+pub const R_390_TLS_TPOFF: u32 = 56;
+/// Direct 20 bit.
+pub const R_390_20: u32 = 57;
+/// 20 bit GOT offset.
+pub const R_390_GOT20: u32 = 58;
+/// 20 bit offset to jump slot.
+pub const R_390_GOTPLT20: u32 = 59;
+/// 20 bit GOT offset for static TLS block offset.
+pub const R_390_TLS_GOTIE20: u32 = 60;
+/// STT_GNU_IFUNC relocation.
+pub const R_390_IRELATIVE: u32 = 61;
+
+// CRIS values `Rel*::r_type`.
+#[allow(missing_docs)]
+pub const R_CRIS_NONE: u32 = 0;
+#[allow(missing_docs)]
+pub const R_CRIS_8: u32 = 1;
+#[allow(missing_docs)]
+pub const R_CRIS_16: u32 = 2;
+#[allow(missing_docs)]
+pub const R_CRIS_32: u32 = 3;
+#[allow(missing_docs)]
+pub const R_CRIS_8_PCREL: u32 = 4;
+#[allow(missing_docs)]
+pub const R_CRIS_16_PCREL: u32 = 5;
+#[allow(missing_docs)]
+pub const R_CRIS_32_PCREL: u32 = 6;
+#[allow(missing_docs)]
+pub const R_CRIS_GNU_VTINHERIT: u32 = 7;
+#[allow(missing_docs)]
+pub const R_CRIS_GNU_VTENTRY: u32 = 8;
+#[allow(missing_docs)]
+pub const R_CRIS_COPY: u32 = 9;
+#[allow(missing_docs)]
+pub const R_CRIS_GLOB_DAT: u32 = 10;
+#[allow(missing_docs)]
+pub const R_CRIS_JUMP_SLOT: u32 = 11;
+#[allow(missing_docs)]
+pub const R_CRIS_RELATIVE: u32 = 12;
+#[allow(missing_docs)]
+pub const R_CRIS_16_GOT: u32 = 13;
+#[allow(missing_docs)]
+pub const R_CRIS_32_GOT: u32 = 14;
+#[allow(missing_docs)]
+pub const R_CRIS_16_GOTPLT: u32 = 15;
+#[allow(missing_docs)]
+pub const R_CRIS_32_GOTPLT: u32 = 16;
+#[allow(missing_docs)]
+pub const R_CRIS_32_GOTREL: u32 = 17;
+#[allow(missing_docs)]
+pub const R_CRIS_32_PLT_GOTREL: u32 = 18;
+#[allow(missing_docs)]
+pub const R_CRIS_32_PLT_PCREL: u32 = 19;
+
+// AMD x86-64 values `Rel*::r_type`.
+/// No reloc
+pub const R_X86_64_NONE: u32 = 0;
+/// Direct 64 bit
+pub const R_X86_64_64: u32 = 1;
+/// PC relative 32 bit signed
+pub const R_X86_64_PC32: u32 = 2;
+/// 32 bit GOT entry
+pub const R_X86_64_GOT32: u32 = 3;
+/// 32 bit PLT address
+pub const R_X86_64_PLT32: u32 = 4;
+/// Copy symbol at runtime
+pub const R_X86_64_COPY: u32 = 5;
+/// Create GOT entry
+pub const R_X86_64_GLOB_DAT: u32 = 6;
+/// Create PLT entry
+pub const R_X86_64_JUMP_SLOT: u32 = 7;
+/// Adjust by program base
+pub const R_X86_64_RELATIVE: u32 = 8;
+/// 32 bit signed PC relative offset to GOT
+pub const R_X86_64_GOTPCREL: u32 = 9;
+/// Direct 32 bit zero extended
+pub const R_X86_64_32: u32 = 10;
+/// Direct 32 bit sign extended
+pub const R_X86_64_32S: u32 = 11;
+/// Direct 16 bit zero extended
+pub const R_X86_64_16: u32 = 12;
+/// 16 bit sign extended pc relative
+pub const R_X86_64_PC16: u32 = 13;
+/// Direct 8 bit sign extended
+pub const R_X86_64_8: u32 = 14;
+/// 8 bit sign extended pc relative
+pub const R_X86_64_PC8: u32 = 15;
+/// ID of module containing symbol
+pub const R_X86_64_DTPMOD64: u32 = 16;
+/// Offset in module's TLS block
+pub const R_X86_64_DTPOFF64: u32 = 17;
+/// Offset in initial TLS block
+pub const R_X86_64_TPOFF64: u32 = 18;
+/// 32 bit signed PC relative offset to two GOT entries for GD symbol
+pub const R_X86_64_TLSGD: u32 = 19;
+/// 32 bit signed PC relative offset to two GOT entries for LD symbol
+pub const R_X86_64_TLSLD: u32 = 20;
+/// Offset in TLS block
+pub const R_X86_64_DTPOFF32: u32 = 21;
+/// 32 bit signed PC relative offset to GOT entry for IE symbol
+pub const R_X86_64_GOTTPOFF: u32 = 22;
+/// Offset in initial TLS block
+pub const R_X86_64_TPOFF32: u32 = 23;
+/// PC relative 64 bit
+pub const R_X86_64_PC64: u32 = 24;
+/// 64 bit offset to GOT
+pub const R_X86_64_GOTOFF64: u32 = 25;
+/// 32 bit signed pc relative offset to GOT
+pub const R_X86_64_GOTPC32: u32 = 26;
+/// 64-bit GOT entry offset
+pub const R_X86_64_GOT64: u32 = 27;
+/// 64-bit PC relative offset to GOT entry
+pub const R_X86_64_GOTPCREL64: u32 = 28;
+/// 64-bit PC relative offset to GOT
+pub const R_X86_64_GOTPC64: u32 = 29;
+/// like GOT64, says PLT entry needed
+pub const R_X86_64_GOTPLT64: u32 = 30;
+/// 64-bit GOT relative offset to PLT entry
+pub const R_X86_64_PLTOFF64: u32 = 31;
+/// Size of symbol plus 32-bit addend
+pub const R_X86_64_SIZE32: u32 = 32;
+/// Size of symbol plus 64-bit addend
+pub const R_X86_64_SIZE64: u32 = 33;
+/// GOT offset for TLS descriptor.
+pub const R_X86_64_GOTPC32_TLSDESC: u32 = 34;
+/// Marker for call through TLS descriptor.
+pub const R_X86_64_TLSDESC_CALL: u32 = 35;
+/// TLS descriptor.
+pub const R_X86_64_TLSDESC: u32 = 36;
+/// Adjust indirectly by program base
+pub const R_X86_64_IRELATIVE: u32 = 37;
+/// 64-bit adjust by program base
+pub const R_X86_64_RELATIVE64: u32 = 38;
+// 39 Reserved was R_X86_64_PC32_BND
+// 40 Reserved was R_X86_64_PLT32_BND
+/// Load from 32 bit signed pc relative offset to GOT entry without REX prefix, relaxable.
+pub const R_X86_64_GOTPCRELX: u32 = 41;
+/// Load from 32 bit signed pc relative offset to GOT entry with REX prefix, relaxable.
+pub const R_X86_64_REX_GOTPCRELX: u32 = 42;
+
+// AMD x86-64 values `SectionHeader*::sh_type`.
+/// Unwind information.
+pub const SHT_X86_64_UNWIND: u32 = 0x7000_0001;
+
+// AM33 values `Rel*::r_type`.
+/// No reloc.
+pub const R_MN10300_NONE: u32 = 0;
+/// Direct 32 bit.
+pub const R_MN10300_32: u32 = 1;
+/// Direct 16 bit.
+pub const R_MN10300_16: u32 = 2;
+/// Direct 8 bit.
+pub const R_MN10300_8: u32 = 3;
+/// PC-relative 32-bit.
+pub const R_MN10300_PCREL32: u32 = 4;
+/// PC-relative 16-bit signed.
+pub const R_MN10300_PCREL16: u32 = 5;
+/// PC-relative 8-bit signed.
+pub const R_MN10300_PCREL8: u32 = 6;
+/// Ancient C++ vtable garbage...
+pub const R_MN10300_GNU_VTINHERIT: u32 = 7;
+/// ... collection annotation.
+pub const R_MN10300_GNU_VTENTRY: u32 = 8;
+/// Direct 24 bit.
+pub const R_MN10300_24: u32 = 9;
+/// 32-bit PCrel offset to GOT.
+pub const R_MN10300_GOTPC32: u32 = 10;
+/// 16-bit PCrel offset to GOT.
+pub const R_MN10300_GOTPC16: u32 = 11;
+/// 32-bit offset from GOT.
+pub const R_MN10300_GOTOFF32: u32 = 12;
+/// 24-bit offset from GOT.
+pub const R_MN10300_GOTOFF24: u32 = 13;
+/// 16-bit offset from GOT.
+pub const R_MN10300_GOTOFF16: u32 = 14;
+/// 32-bit PCrel to PLT entry.
+pub const R_MN10300_PLT32: u32 = 15;
+/// 16-bit PCrel to PLT entry.
+pub const R_MN10300_PLT16: u32 = 16;
+/// 32-bit offset to GOT entry.
+pub const R_MN10300_GOT32: u32 = 17;
+/// 24-bit offset to GOT entry.
+pub const R_MN10300_GOT24: u32 = 18;
+/// 16-bit offset to GOT entry.
+pub const R_MN10300_GOT16: u32 = 19;
+/// Copy symbol at runtime.
+pub const R_MN10300_COPY: u32 = 20;
+/// Create GOT entry.
+pub const R_MN10300_GLOB_DAT: u32 = 21;
+/// Create PLT entry.
+pub const R_MN10300_JMP_SLOT: u32 = 22;
+/// Adjust by program base.
+pub const R_MN10300_RELATIVE: u32 = 23;
+/// 32-bit offset for global dynamic.
+pub const R_MN10300_TLS_GD: u32 = 24;
+/// 32-bit offset for local dynamic.
+pub const R_MN10300_TLS_LD: u32 = 25;
+/// Module-relative offset.
+pub const R_MN10300_TLS_LDO: u32 = 26;
+/// GOT offset for static TLS block offset.
+pub const R_MN10300_TLS_GOTIE: u32 = 27;
+/// GOT address for static TLS block offset.
+pub const R_MN10300_TLS_IE: u32 = 28;
+/// Offset relative to static TLS block.
+pub const R_MN10300_TLS_LE: u32 = 29;
+/// ID of module containing symbol.
+pub const R_MN10300_TLS_DTPMOD: u32 = 30;
+/// Offset in module TLS block.
+pub const R_MN10300_TLS_DTPOFF: u32 = 31;
+/// Offset in static TLS block.
+pub const R_MN10300_TLS_TPOFF: u32 = 32;
+/// Adjustment for next reloc as needed by linker relaxation.
+pub const R_MN10300_SYM_DIFF: u32 = 33;
+/// Alignment requirement for linker relaxation.
+pub const R_MN10300_ALIGN: u32 = 34;
+
+// M32R values `Rel32::r_type`.
+/// No reloc.
+pub const R_M32R_NONE: u32 = 0;
+/// Direct 16 bit.
+pub const R_M32R_16: u32 = 1;
+/// Direct 32 bit.
+pub const R_M32R_32: u32 = 2;
+/// Direct 24 bit.
+pub const R_M32R_24: u32 = 3;
+/// PC relative 10 bit shifted.
+pub const R_M32R_10_PCREL: u32 = 4;
+/// PC relative 18 bit shifted.
+pub const R_M32R_18_PCREL: u32 = 5;
+/// PC relative 26 bit shifted.
+pub const R_M32R_26_PCREL: u32 = 6;
+/// High 16 bit with unsigned low.
+pub const R_M32R_HI16_ULO: u32 = 7;
+/// High 16 bit with signed low.
+pub const R_M32R_HI16_SLO: u32 = 8;
+/// Low 16 bit.
+pub const R_M32R_LO16: u32 = 9;
+/// 16 bit offset in SDA.
+pub const R_M32R_SDA16: u32 = 10;
+#[allow(missing_docs)]
+pub const R_M32R_GNU_VTINHERIT: u32 = 11;
+#[allow(missing_docs)]
+pub const R_M32R_GNU_VTENTRY: u32 = 12;
+// M32R values `Rela32::r_type`.
+/// Direct 16 bit.
+pub const R_M32R_16_RELA: u32 = 33;
+/// Direct 32 bit.
+pub const R_M32R_32_RELA: u32 = 34;
+/// Direct 24 bit.
+pub const R_M32R_24_RELA: u32 = 35;
+/// PC relative 10 bit shifted.
+pub const R_M32R_10_PCREL_RELA: u32 = 36;
+/// PC relative 18 bit shifted.
+pub const R_M32R_18_PCREL_RELA: u32 = 37;
+/// PC relative 26 bit shifted.
+pub const R_M32R_26_PCREL_RELA: u32 = 38;
+/// High 16 bit with unsigned low
+pub const R_M32R_HI16_ULO_RELA: u32 = 39;
+/// High 16 bit with signed low
+pub const R_M32R_HI16_SLO_RELA: u32 = 40;
+/// Low 16 bit
+pub const R_M32R_LO16_RELA: u32 = 41;
+/// 16 bit offset in SDA
+pub const R_M32R_SDA16_RELA: u32 = 42;
+#[allow(missing_docs)]
+pub const R_M32R_RELA_GNU_VTINHERIT: u32 = 43;
+#[allow(missing_docs)]
+pub const R_M32R_RELA_GNU_VTENTRY: u32 = 44;
+/// PC relative 32 bit.
+pub const R_M32R_REL32: u32 = 45;
+
+/// 24 bit GOT entry
+pub const R_M32R_GOT24: u32 = 48;
+/// 26 bit PC relative to PLT shifted
+pub const R_M32R_26_PLTREL: u32 = 49;
+/// Copy symbol at runtime
+pub const R_M32R_COPY: u32 = 50;
+/// Create GOT entry
+pub const R_M32R_GLOB_DAT: u32 = 51;
+/// Create PLT entry
+pub const R_M32R_JMP_SLOT: u32 = 52;
+/// Adjust by program base
+pub const R_M32R_RELATIVE: u32 = 53;
+/// 24 bit offset to GOT
+pub const R_M32R_GOTOFF: u32 = 54;
+/// 24 bit PC relative offset to GOT
+pub const R_M32R_GOTPC24: u32 = 55;
+/// High 16 bit GOT entry with unsigned low
+pub const R_M32R_GOT16_HI_ULO: u32 = 56;
+/// High 16 bit GOT entry with signed low
+pub const R_M32R_GOT16_HI_SLO: u32 = 57;
+/// Low 16 bit GOT entry
+pub const R_M32R_GOT16_LO: u32 = 58;
+/// High 16 bit PC relative offset to GOT with unsigned low
+pub const R_M32R_GOTPC_HI_ULO: u32 = 59;
+/// High 16 bit PC relative offset to GOT with signed low
+pub const R_M32R_GOTPC_HI_SLO: u32 = 60;
+/// Low 16 bit PC relative offset to GOT
+pub const R_M32R_GOTPC_LO: u32 = 61;
+/// High 16 bit offset to GOT with unsigned low
+pub const R_M32R_GOTOFF_HI_ULO: u32 = 62;
+/// High 16 bit offset to GOT with signed low
+pub const R_M32R_GOTOFF_HI_SLO: u32 = 63;
+/// Low 16 bit offset to GOT
+pub const R_M32R_GOTOFF_LO: u32 = 64;
+/// Keep this the last entry.
+pub const R_M32R_NUM: u32 = 256;
+
+// MicroBlaze values `Rel*::r_type`.
+/// No reloc.
+pub const R_MICROBLAZE_NONE: u32 = 0;
+/// Direct 32 bit.
+pub const R_MICROBLAZE_32: u32 = 1;
+/// PC relative 32 bit.
+pub const R_MICROBLAZE_32_PCREL: u32 = 2;
+/// PC relative 64 bit.
+pub const R_MICROBLAZE_64_PCREL: u32 = 3;
+/// Low 16 bits of PCREL32.
+pub const R_MICROBLAZE_32_PCREL_LO: u32 = 4;
+/// Direct 64 bit.
+pub const R_MICROBLAZE_64: u32 = 5;
+/// Low 16 bit.
+pub const R_MICROBLAZE_32_LO: u32 = 6;
+/// Read-only small data area.
+pub const R_MICROBLAZE_SRO32: u32 = 7;
+/// Read-write small data area.
+pub const R_MICROBLAZE_SRW32: u32 = 8;
+/// No reloc.
+pub const R_MICROBLAZE_64_NONE: u32 = 9;
+/// Symbol Op Symbol relocation.
+pub const R_MICROBLAZE_32_SYM_OP_SYM: u32 = 10;
+/// GNU C++ vtable hierarchy.
+pub const R_MICROBLAZE_GNU_VTINHERIT: u32 = 11;
+/// GNU C++ vtable member usage.
+pub const R_MICROBLAZE_GNU_VTENTRY: u32 = 12;
+/// PC-relative GOT offset.
+pub const R_MICROBLAZE_GOTPC_64: u32 = 13;
+/// GOT entry offset.
+pub const R_MICROBLAZE_GOT_64: u32 = 14;
+/// PLT offset (PC-relative).
+pub const R_MICROBLAZE_PLT_64: u32 = 15;
+/// Adjust by program base.
+pub const R_MICROBLAZE_REL: u32 = 16;
+/// Create PLT entry.
+pub const R_MICROBLAZE_JUMP_SLOT: u32 = 17;
+/// Create GOT entry.
+pub const R_MICROBLAZE_GLOB_DAT: u32 = 18;
+/// 64 bit offset to GOT.
+pub const R_MICROBLAZE_GOTOFF_64: u32 = 19;
+/// 32 bit offset to GOT.
+pub const R_MICROBLAZE_GOTOFF_32: u32 = 20;
+/// Runtime copy.
+pub const R_MICROBLAZE_COPY: u32 = 21;
+/// TLS Reloc.
+pub const R_MICROBLAZE_TLS: u32 = 22;
+/// TLS General Dynamic.
+pub const R_MICROBLAZE_TLSGD: u32 = 23;
+/// TLS Local Dynamic.
+pub const R_MICROBLAZE_TLSLD: u32 = 24;
+/// TLS Module ID.
+pub const R_MICROBLAZE_TLSDTPMOD32: u32 = 25;
+/// TLS Offset Within TLS Block.
+pub const R_MICROBLAZE_TLSDTPREL32: u32 = 26;
+/// TLS Offset Within TLS Block.
+pub const R_MICROBLAZE_TLSDTPREL64: u32 = 27;
+/// TLS Offset From Thread Pointer.
+pub const R_MICROBLAZE_TLSGOTTPREL32: u32 = 28;
+/// TLS Offset From Thread Pointer.
+pub const R_MICROBLAZE_TLSTPREL32: u32 = 29;
+
+// Nios II values `Dyn::d_tag`.
+/// Address of _gp.
+pub const DT_NIOS2_GP: u32 = 0x7000_0002;
+
+// Nios II values `Rel*::r_type`.
+/// No reloc.
+pub const R_NIOS2_NONE: u32 = 0;
+/// Direct signed 16 bit.
+pub const R_NIOS2_S16: u32 = 1;
+/// Direct unsigned 16 bit.
+pub const R_NIOS2_U16: u32 = 2;
+/// PC relative 16 bit.
+pub const R_NIOS2_PCREL16: u32 = 3;
+/// Direct call.
+pub const R_NIOS2_CALL26: u32 = 4;
+/// 5 bit constant expression.
+pub const R_NIOS2_IMM5: u32 = 5;
+/// 5 bit expression, shift 22.
+pub const R_NIOS2_CACHE_OPX: u32 = 6;
+/// 6 bit constant expression.
+pub const R_NIOS2_IMM6: u32 = 7;
+/// 8 bit constant expression.
+pub const R_NIOS2_IMM8: u32 = 8;
+/// High 16 bit.
+pub const R_NIOS2_HI16: u32 = 9;
+/// Low 16 bit.
+pub const R_NIOS2_LO16: u32 = 10;
+/// High 16 bit, adjusted.
+pub const R_NIOS2_HIADJ16: u32 = 11;
+/// 32 bit symbol value + addend.
+pub const R_NIOS2_BFD_RELOC_32: u32 = 12;
+/// 16 bit symbol value + addend.
+pub const R_NIOS2_BFD_RELOC_16: u32 = 13;
+/// 8 bit symbol value + addend.
+pub const R_NIOS2_BFD_RELOC_8: u32 = 14;
+/// 16 bit GP pointer offset.
+pub const R_NIOS2_GPREL: u32 = 15;
+/// GNU C++ vtable hierarchy.
+pub const R_NIOS2_GNU_VTINHERIT: u32 = 16;
+/// GNU C++ vtable member usage.
+pub const R_NIOS2_GNU_VTENTRY: u32 = 17;
+/// Unconditional branch.
+pub const R_NIOS2_UJMP: u32 = 18;
+/// Conditional branch.
+pub const R_NIOS2_CJMP: u32 = 19;
+/// Indirect call through register.
+pub const R_NIOS2_CALLR: u32 = 20;
+/// Alignment requirement for linker relaxation.
+pub const R_NIOS2_ALIGN: u32 = 21;
+/// 16 bit GOT entry.
+pub const R_NIOS2_GOT16: u32 = 22;
+/// 16 bit GOT entry for function.
+pub const R_NIOS2_CALL16: u32 = 23;
+/// %lo of offset to GOT pointer.
+pub const R_NIOS2_GOTOFF_LO: u32 = 24;
+/// %hiadj of offset to GOT pointer.
+pub const R_NIOS2_GOTOFF_HA: u32 = 25;
+/// %lo of PC relative offset.
+pub const R_NIOS2_PCREL_LO: u32 = 26;
+/// %hiadj of PC relative offset.
+pub const R_NIOS2_PCREL_HA: u32 = 27;
+/// 16 bit GOT offset for TLS GD.
+pub const R_NIOS2_TLS_GD16: u32 = 28;
+/// 16 bit GOT offset for TLS LDM.
+pub const R_NIOS2_TLS_LDM16: u32 = 29;
+/// 16 bit module relative offset.
+pub const R_NIOS2_TLS_LDO16: u32 = 30;
+/// 16 bit GOT offset for TLS IE.
+pub const R_NIOS2_TLS_IE16: u32 = 31;
+/// 16 bit LE TP-relative offset.
+pub const R_NIOS2_TLS_LE16: u32 = 32;
+/// Module number.
+pub const R_NIOS2_TLS_DTPMOD: u32 = 33;
+/// Module-relative offset.
+pub const R_NIOS2_TLS_DTPREL: u32 = 34;
+/// TP-relative offset.
+pub const R_NIOS2_TLS_TPREL: u32 = 35;
+/// Copy symbol at runtime.
+pub const R_NIOS2_COPY: u32 = 36;
+/// Create GOT entry.
+pub const R_NIOS2_GLOB_DAT: u32 = 37;
+/// Create PLT entry.
+pub const R_NIOS2_JUMP_SLOT: u32 = 38;
+/// Adjust by program base.
+pub const R_NIOS2_RELATIVE: u32 = 39;
+/// 16 bit offset to GOT pointer.
+pub const R_NIOS2_GOTOFF: u32 = 40;
+/// Direct call in .noat section.
+pub const R_NIOS2_CALL26_NOAT: u32 = 41;
+/// %lo() of GOT entry.
+pub const R_NIOS2_GOT_LO: u32 = 42;
+/// %hiadj() of GOT entry.
+pub const R_NIOS2_GOT_HA: u32 = 43;
+/// %lo() of function GOT entry.
+pub const R_NIOS2_CALL_LO: u32 = 44;
+/// %hiadj() of function GOT entry.
+pub const R_NIOS2_CALL_HA: u32 = 45;
+
+// TILEPro values `Rel*::r_type`.
+/// No reloc
+pub const R_TILEPRO_NONE: u32 = 0;
+/// Direct 32 bit
+pub const R_TILEPRO_32: u32 = 1;
+/// Direct 16 bit
+pub const R_TILEPRO_16: u32 = 2;
+/// Direct 8 bit
+pub const R_TILEPRO_8: u32 = 3;
+/// PC relative 32 bit
+pub const R_TILEPRO_32_PCREL: u32 = 4;
+/// PC relative 16 bit
+pub const R_TILEPRO_16_PCREL: u32 = 5;
+/// PC relative 8 bit
+pub const R_TILEPRO_8_PCREL: u32 = 6;
+/// Low 16 bit
+pub const R_TILEPRO_LO16: u32 = 7;
+/// High 16 bit
+pub const R_TILEPRO_HI16: u32 = 8;
+/// High 16 bit, adjusted
+pub const R_TILEPRO_HA16: u32 = 9;
+/// Copy relocation
+pub const R_TILEPRO_COPY: u32 = 10;
+/// Create GOT entry
+pub const R_TILEPRO_GLOB_DAT: u32 = 11;
+/// Create PLT entry
+pub const R_TILEPRO_JMP_SLOT: u32 = 12;
+/// Adjust by program base
+pub const R_TILEPRO_RELATIVE: u32 = 13;
+/// X1 pipe branch offset
+pub const R_TILEPRO_BROFF_X1: u32 = 14;
+/// X1 pipe jump offset
+pub const R_TILEPRO_JOFFLONG_X1: u32 = 15;
+/// X1 pipe jump offset to PLT
+pub const R_TILEPRO_JOFFLONG_X1_PLT: u32 = 16;
+/// X0 pipe 8-bit
+pub const R_TILEPRO_IMM8_X0: u32 = 17;
+/// Y0 pipe 8-bit
+pub const R_TILEPRO_IMM8_Y0: u32 = 18;
+/// X1 pipe 8-bit
+pub const R_TILEPRO_IMM8_X1: u32 = 19;
+/// Y1 pipe 8-bit
+pub const R_TILEPRO_IMM8_Y1: u32 = 20;
+/// X1 pipe mtspr
+pub const R_TILEPRO_MT_IMM15_X1: u32 = 21;
+/// X1 pipe mfspr
+pub const R_TILEPRO_MF_IMM15_X1: u32 = 22;
+/// X0 pipe 16-bit
+pub const R_TILEPRO_IMM16_X0: u32 = 23;
+/// X1 pipe 16-bit
+pub const R_TILEPRO_IMM16_X1: u32 = 24;
+/// X0 pipe low 16-bit
+pub const R_TILEPRO_IMM16_X0_LO: u32 = 25;
+/// X1 pipe low 16-bit
+pub const R_TILEPRO_IMM16_X1_LO: u32 = 26;
+/// X0 pipe high 16-bit
+pub const R_TILEPRO_IMM16_X0_HI: u32 = 27;
+/// X1 pipe high 16-bit
+pub const R_TILEPRO_IMM16_X1_HI: u32 = 28;
+/// X0 pipe high 16-bit, adjusted
+pub const R_TILEPRO_IMM16_X0_HA: u32 = 29;
+/// X1 pipe high 16-bit, adjusted
+pub const R_TILEPRO_IMM16_X1_HA: u32 = 30;
+/// X0 pipe PC relative 16 bit
+pub const R_TILEPRO_IMM16_X0_PCREL: u32 = 31;
+/// X1 pipe PC relative 16 bit
+pub const R_TILEPRO_IMM16_X1_PCREL: u32 = 32;
+/// X0 pipe PC relative low 16 bit
+pub const R_TILEPRO_IMM16_X0_LO_PCREL: u32 = 33;
+/// X1 pipe PC relative low 16 bit
+pub const R_TILEPRO_IMM16_X1_LO_PCREL: u32 = 34;
+/// X0 pipe PC relative high 16 bit
+pub const R_TILEPRO_IMM16_X0_HI_PCREL: u32 = 35;
+/// X1 pipe PC relative high 16 bit
+pub const R_TILEPRO_IMM16_X1_HI_PCREL: u32 = 36;
+/// X0 pipe PC relative ha() 16 bit
+pub const R_TILEPRO_IMM16_X0_HA_PCREL: u32 = 37;
+/// X1 pipe PC relative ha() 16 bit
+pub const R_TILEPRO_IMM16_X1_HA_PCREL: u32 = 38;
+/// X0 pipe 16-bit GOT offset
+pub const R_TILEPRO_IMM16_X0_GOT: u32 = 39;
+/// X1 pipe 16-bit GOT offset
+pub const R_TILEPRO_IMM16_X1_GOT: u32 = 40;
+/// X0 pipe low 16-bit GOT offset
+pub const R_TILEPRO_IMM16_X0_GOT_LO: u32 = 41;
+/// X1 pipe low 16-bit GOT offset
+pub const R_TILEPRO_IMM16_X1_GOT_LO: u32 = 42;
+/// X0 pipe high 16-bit GOT offset
+pub const R_TILEPRO_IMM16_X0_GOT_HI: u32 = 43;
+/// X1 pipe high 16-bit GOT offset
+pub const R_TILEPRO_IMM16_X1_GOT_HI: u32 = 44;
+/// X0 pipe ha() 16-bit GOT offset
+pub const R_TILEPRO_IMM16_X0_GOT_HA: u32 = 45;
+/// X1 pipe ha() 16-bit GOT offset
+pub const R_TILEPRO_IMM16_X1_GOT_HA: u32 = 46;
+/// X0 pipe mm "start"
+pub const R_TILEPRO_MMSTART_X0: u32 = 47;
+/// X0 pipe mm "end"
+pub const R_TILEPRO_MMEND_X0: u32 = 48;
+/// X1 pipe mm "start"
+pub const R_TILEPRO_MMSTART_X1: u32 = 49;
+/// X1 pipe mm "end"
+pub const R_TILEPRO_MMEND_X1: u32 = 50;
+/// X0 pipe shift amount
+pub const R_TILEPRO_SHAMT_X0: u32 = 51;
+/// X1 pipe shift amount
+pub const R_TILEPRO_SHAMT_X1: u32 = 52;
+/// Y0 pipe shift amount
+pub const R_TILEPRO_SHAMT_Y0: u32 = 53;
+/// Y1 pipe shift amount
+pub const R_TILEPRO_SHAMT_Y1: u32 = 54;
+/// X1 pipe destination 8-bit
+pub const R_TILEPRO_DEST_IMM8_X1: u32 = 55;
+// Relocs 56-59 are currently not defined.
+/// "jal" for TLS GD
+pub const R_TILEPRO_TLS_GD_CALL: u32 = 60;
+/// X0 pipe "addi" for TLS GD
+pub const R_TILEPRO_IMM8_X0_TLS_GD_ADD: u32 = 61;
+/// X1 pipe "addi" for TLS GD
+pub const R_TILEPRO_IMM8_X1_TLS_GD_ADD: u32 = 62;
+/// Y0 pipe "addi" for TLS GD
+pub const R_TILEPRO_IMM8_Y0_TLS_GD_ADD: u32 = 63;
+/// Y1 pipe "addi" for TLS GD
+pub const R_TILEPRO_IMM8_Y1_TLS_GD_ADD: u32 = 64;
+/// "lw_tls" for TLS IE
+pub const R_TILEPRO_TLS_IE_LOAD: u32 = 65;
+/// X0 pipe 16-bit TLS GD offset
+pub const R_TILEPRO_IMM16_X0_TLS_GD: u32 = 66;
+/// X1 pipe 16-bit TLS GD offset
+pub const R_TILEPRO_IMM16_X1_TLS_GD: u32 = 67;
+/// X0 pipe low 16-bit TLS GD offset
+pub const R_TILEPRO_IMM16_X0_TLS_GD_LO: u32 = 68;
+/// X1 pipe low 16-bit TLS GD offset
+pub const R_TILEPRO_IMM16_X1_TLS_GD_LO: u32 = 69;
+/// X0 pipe high 16-bit TLS GD offset
+pub const R_TILEPRO_IMM16_X0_TLS_GD_HI: u32 = 70;
+/// X1 pipe high 16-bit TLS GD offset
+pub const R_TILEPRO_IMM16_X1_TLS_GD_HI: u32 = 71;
+/// X0 pipe ha() 16-bit TLS GD offset
+pub const R_TILEPRO_IMM16_X0_TLS_GD_HA: u32 = 72;
+/// X1 pipe ha() 16-bit TLS GD offset
+pub const R_TILEPRO_IMM16_X1_TLS_GD_HA: u32 = 73;
+/// X0 pipe 16-bit TLS IE offset
+pub const R_TILEPRO_IMM16_X0_TLS_IE: u32 = 74;
+/// X1 pipe 16-bit TLS IE offset
+pub const R_TILEPRO_IMM16_X1_TLS_IE: u32 = 75;
+/// X0 pipe low 16-bit TLS IE offset
+pub const R_TILEPRO_IMM16_X0_TLS_IE_LO: u32 = 76;
+/// X1 pipe low 16-bit TLS IE offset
+pub const R_TILEPRO_IMM16_X1_TLS_IE_LO: u32 = 77;
+/// X0 pipe high 16-bit TLS IE offset
+pub const R_TILEPRO_IMM16_X0_TLS_IE_HI: u32 = 78;
+/// X1 pipe high 16-bit TLS IE offset
+pub const R_TILEPRO_IMM16_X1_TLS_IE_HI: u32 = 79;
+/// X0 pipe ha() 16-bit TLS IE offset
+pub const R_TILEPRO_IMM16_X0_TLS_IE_HA: u32 = 80;
+/// X1 pipe ha() 16-bit TLS IE offset
+pub const R_TILEPRO_IMM16_X1_TLS_IE_HA: u32 = 81;
+/// ID of module containing symbol
+pub const R_TILEPRO_TLS_DTPMOD32: u32 = 82;
+/// Offset in TLS block
+pub const R_TILEPRO_TLS_DTPOFF32: u32 = 83;
+/// Offset in static TLS block
+pub const R_TILEPRO_TLS_TPOFF32: u32 = 84;
+/// X0 pipe 16-bit TLS LE offset
+pub const R_TILEPRO_IMM16_X0_TLS_LE: u32 = 85;
+/// X1 pipe 16-bit TLS LE offset
+pub const R_TILEPRO_IMM16_X1_TLS_LE: u32 = 86;
+/// X0 pipe low 16-bit TLS LE offset
+pub const R_TILEPRO_IMM16_X0_TLS_LE_LO: u32 = 87;
+/// X1 pipe low 16-bit TLS LE offset
+pub const R_TILEPRO_IMM16_X1_TLS_LE_LO: u32 = 88;
+/// X0 pipe high 16-bit TLS LE offset
+pub const R_TILEPRO_IMM16_X0_TLS_LE_HI: u32 = 89;
+/// X1 pipe high 16-bit TLS LE offset
+pub const R_TILEPRO_IMM16_X1_TLS_LE_HI: u32 = 90;
+/// X0 pipe ha() 16-bit TLS LE offset
+pub const R_TILEPRO_IMM16_X0_TLS_LE_HA: u32 = 91;
+/// X1 pipe ha() 16-bit TLS LE offset
+pub const R_TILEPRO_IMM16_X1_TLS_LE_HA: u32 = 92;
+
+/// GNU C++ vtable hierarchy
+pub const R_TILEPRO_GNU_VTINHERIT: u32 = 128;
+/// GNU C++ vtable member usage
+pub const R_TILEPRO_GNU_VTENTRY: u32 = 129;
+
+// TILE-Gx values `Rel*::r_type`.
+/// No reloc
+pub const R_TILEGX_NONE: u32 = 0;
+/// Direct 64 bit
+pub const R_TILEGX_64: u32 = 1;
+/// Direct 32 bit
+pub const R_TILEGX_32: u32 = 2;
+/// Direct 16 bit
+pub const R_TILEGX_16: u32 = 3;
+/// Direct 8 bit
+pub const R_TILEGX_8: u32 = 4;
+/// PC relative 64 bit
+pub const R_TILEGX_64_PCREL: u32 = 5;
+/// PC relative 32 bit
+pub const R_TILEGX_32_PCREL: u32 = 6;
+/// PC relative 16 bit
+pub const R_TILEGX_16_PCREL: u32 = 7;
+/// PC relative 8 bit
+pub const R_TILEGX_8_PCREL: u32 = 8;
+/// hword 0 16-bit
+pub const R_TILEGX_HW0: u32 = 9;
+/// hword 1 16-bit
+pub const R_TILEGX_HW1: u32 = 10;
+/// hword 2 16-bit
+pub const R_TILEGX_HW2: u32 = 11;
+/// hword 3 16-bit
+pub const R_TILEGX_HW3: u32 = 12;
+/// last hword 0 16-bit
+pub const R_TILEGX_HW0_LAST: u32 = 13;
+/// last hword 1 16-bit
+pub const R_TILEGX_HW1_LAST: u32 = 14;
+/// last hword 2 16-bit
+pub const R_TILEGX_HW2_LAST: u32 = 15;
+/// Copy relocation
+pub const R_TILEGX_COPY: u32 = 16;
+/// Create GOT entry
+pub const R_TILEGX_GLOB_DAT: u32 = 17;
+/// Create PLT entry
+pub const R_TILEGX_JMP_SLOT: u32 = 18;
+/// Adjust by program base
+pub const R_TILEGX_RELATIVE: u32 = 19;
+/// X1 pipe branch offset
+pub const R_TILEGX_BROFF_X1: u32 = 20;
+/// X1 pipe jump offset
+pub const R_TILEGX_JUMPOFF_X1: u32 = 21;
+/// X1 pipe jump offset to PLT
+pub const R_TILEGX_JUMPOFF_X1_PLT: u32 = 22;
+/// X0 pipe 8-bit
+pub const R_TILEGX_IMM8_X0: u32 = 23;
+/// Y0 pipe 8-bit
+pub const R_TILEGX_IMM8_Y0: u32 = 24;
+/// X1 pipe 8-bit
+pub const R_TILEGX_IMM8_X1: u32 = 25;
+/// Y1 pipe 8-bit
+pub const R_TILEGX_IMM8_Y1: u32 = 26;
+/// X1 pipe destination 8-bit
+pub const R_TILEGX_DEST_IMM8_X1: u32 = 27;
+/// X1 pipe mtspr
+pub const R_TILEGX_MT_IMM14_X1: u32 = 28;
+/// X1 pipe mfspr
+pub const R_TILEGX_MF_IMM14_X1: u32 = 29;
+/// X0 pipe mm "start"
+pub const R_TILEGX_MMSTART_X0: u32 = 30;
+/// X0 pipe mm "end"
+pub const R_TILEGX_MMEND_X0: u32 = 31;
+/// X0 pipe shift amount
+pub const R_TILEGX_SHAMT_X0: u32 = 32;
+/// X1 pipe shift amount
+pub const R_TILEGX_SHAMT_X1: u32 = 33;
+/// Y0 pipe shift amount
+pub const R_TILEGX_SHAMT_Y0: u32 = 34;
+/// Y1 pipe shift amount
+pub const R_TILEGX_SHAMT_Y1: u32 = 35;
+/// X0 pipe hword 0
+pub const R_TILEGX_IMM16_X0_HW0: u32 = 36;
+/// X1 pipe hword 0
+pub const R_TILEGX_IMM16_X1_HW0: u32 = 37;
+/// X0 pipe hword 1
+pub const R_TILEGX_IMM16_X0_HW1: u32 = 38;
+/// X1 pipe hword 1
+pub const R_TILEGX_IMM16_X1_HW1: u32 = 39;
+/// X0 pipe hword 2
+pub const R_TILEGX_IMM16_X0_HW2: u32 = 40;
+/// X1 pipe hword 2
+pub const R_TILEGX_IMM16_X1_HW2: u32 = 41;
+/// X0 pipe hword 3
+pub const R_TILEGX_IMM16_X0_HW3: u32 = 42;
+/// X1 pipe hword 3
+pub const R_TILEGX_IMM16_X1_HW3: u32 = 43;
+/// X0 pipe last hword 0
+pub const R_TILEGX_IMM16_X0_HW0_LAST: u32 = 44;
+/// X1 pipe last hword 0
+pub const R_TILEGX_IMM16_X1_HW0_LAST: u32 = 45;
+/// X0 pipe last hword 1
+pub const R_TILEGX_IMM16_X0_HW1_LAST: u32 = 46;
+/// X1 pipe last hword 1
+pub const R_TILEGX_IMM16_X1_HW1_LAST: u32 = 47;
+/// X0 pipe last hword 2
+pub const R_TILEGX_IMM16_X0_HW2_LAST: u32 = 48;
+/// X1 pipe last hword 2
+pub const R_TILEGX_IMM16_X1_HW2_LAST: u32 = 49;
+/// X0 pipe PC relative hword 0
+pub const R_TILEGX_IMM16_X0_HW0_PCREL: u32 = 50;
+/// X1 pipe PC relative hword 0
+pub const R_TILEGX_IMM16_X1_HW0_PCREL: u32 = 51;
+/// X0 pipe PC relative hword 1
+pub const R_TILEGX_IMM16_X0_HW1_PCREL: u32 = 52;
+/// X1 pipe PC relative hword 1
+pub const R_TILEGX_IMM16_X1_HW1_PCREL: u32 = 53;
+/// X0 pipe PC relative hword 2
+pub const R_TILEGX_IMM16_X0_HW2_PCREL: u32 = 54;
+/// X1 pipe PC relative hword 2
+pub const R_TILEGX_IMM16_X1_HW2_PCREL: u32 = 55;
+/// X0 pipe PC relative hword 3
+pub const R_TILEGX_IMM16_X0_HW3_PCREL: u32 = 56;
+/// X1 pipe PC relative hword 3
+pub const R_TILEGX_IMM16_X1_HW3_PCREL: u32 = 57;
+/// X0 pipe PC-rel last hword 0
+pub const R_TILEGX_IMM16_X0_HW0_LAST_PCREL: u32 = 58;
+/// X1 pipe PC-rel last hword 0
+pub const R_TILEGX_IMM16_X1_HW0_LAST_PCREL: u32 = 59;
+/// X0 pipe PC-rel last hword 1
+pub const R_TILEGX_IMM16_X0_HW1_LAST_PCREL: u32 = 60;
+/// X1 pipe PC-rel last hword 1
+pub const R_TILEGX_IMM16_X1_HW1_LAST_PCREL: u32 = 61;
+/// X0 pipe PC-rel last hword 2
+pub const R_TILEGX_IMM16_X0_HW2_LAST_PCREL: u32 = 62;
+/// X1 pipe PC-rel last hword 2
+pub const R_TILEGX_IMM16_X1_HW2_LAST_PCREL: u32 = 63;
+/// X0 pipe hword 0 GOT offset
+pub const R_TILEGX_IMM16_X0_HW0_GOT: u32 = 64;
+/// X1 pipe hword 0 GOT offset
+pub const R_TILEGX_IMM16_X1_HW0_GOT: u32 = 65;
+/// X0 pipe PC-rel PLT hword 0
+pub const R_TILEGX_IMM16_X0_HW0_PLT_PCREL: u32 = 66;
+/// X1 pipe PC-rel PLT hword 0
+pub const R_TILEGX_IMM16_X1_HW0_PLT_PCREL: u32 = 67;
+/// X0 pipe PC-rel PLT hword 1
+pub const R_TILEGX_IMM16_X0_HW1_PLT_PCREL: u32 = 68;
+/// X1 pipe PC-rel PLT hword 1
+pub const R_TILEGX_IMM16_X1_HW1_PLT_PCREL: u32 = 69;
+/// X0 pipe PC-rel PLT hword 2
+pub const R_TILEGX_IMM16_X0_HW2_PLT_PCREL: u32 = 70;
+/// X1 pipe PC-rel PLT hword 2
+pub const R_TILEGX_IMM16_X1_HW2_PLT_PCREL: u32 = 71;
+/// X0 pipe last hword 0 GOT offset
+pub const R_TILEGX_IMM16_X0_HW0_LAST_GOT: u32 = 72;
+/// X1 pipe last hword 0 GOT offset
+pub const R_TILEGX_IMM16_X1_HW0_LAST_GOT: u32 = 73;
+/// X0 pipe last hword 1 GOT offset
+pub const R_TILEGX_IMM16_X0_HW1_LAST_GOT: u32 = 74;
+/// X1 pipe last hword 1 GOT offset
+pub const R_TILEGX_IMM16_X1_HW1_LAST_GOT: u32 = 75;
+/// X0 pipe PC-rel PLT hword 3
+pub const R_TILEGX_IMM16_X0_HW3_PLT_PCREL: u32 = 76;
+/// X1 pipe PC-rel PLT hword 3
+pub const R_TILEGX_IMM16_X1_HW3_PLT_PCREL: u32 = 77;
+/// X0 pipe hword 0 TLS GD offset
+pub const R_TILEGX_IMM16_X0_HW0_TLS_GD: u32 = 78;
+/// X1 pipe hword 0 TLS GD offset
+pub const R_TILEGX_IMM16_X1_HW0_TLS_GD: u32 = 79;
+/// X0 pipe hword 0 TLS LE offset
+pub const R_TILEGX_IMM16_X0_HW0_TLS_LE: u32 = 80;
+/// X1 pipe hword 0 TLS LE offset
+pub const R_TILEGX_IMM16_X1_HW0_TLS_LE: u32 = 81;
+/// X0 pipe last hword 0 LE off
+pub const R_TILEGX_IMM16_X0_HW0_LAST_TLS_LE: u32 = 82;
+/// X1 pipe last hword 0 LE off
+pub const R_TILEGX_IMM16_X1_HW0_LAST_TLS_LE: u32 = 83;
+/// X0 pipe last hword 1 LE off
+pub const R_TILEGX_IMM16_X0_HW1_LAST_TLS_LE: u32 = 84;
+/// X1 pipe last hword 1 LE off
+pub const R_TILEGX_IMM16_X1_HW1_LAST_TLS_LE: u32 = 85;
+/// X0 pipe last hword 0 GD off
+pub const R_TILEGX_IMM16_X0_HW0_LAST_TLS_GD: u32 = 86;
+/// X1 pipe last hword 0 GD off
+pub const R_TILEGX_IMM16_X1_HW0_LAST_TLS_GD: u32 = 87;
+/// X0 pipe last hword 1 GD off
+pub const R_TILEGX_IMM16_X0_HW1_LAST_TLS_GD: u32 = 88;
+/// X1 pipe last hword 1 GD off
+pub const R_TILEGX_IMM16_X1_HW1_LAST_TLS_GD: u32 = 89;
+// Relocs 90-91 are currently not defined.
+/// X0 pipe hword 0 TLS IE offset
+pub const R_TILEGX_IMM16_X0_HW0_TLS_IE: u32 = 92;
+/// X1 pipe hword 0 TLS IE offset
+pub const R_TILEGX_IMM16_X1_HW0_TLS_IE: u32 = 93;
+/// X0 pipe PC-rel PLT last hword 0
+pub const R_TILEGX_IMM16_X0_HW0_LAST_PLT_PCREL: u32 = 94;
+/// X1 pipe PC-rel PLT last hword 0
+pub const R_TILEGX_IMM16_X1_HW0_LAST_PLT_PCREL: u32 = 95;
+/// X0 pipe PC-rel PLT last hword 1
+pub const R_TILEGX_IMM16_X0_HW1_LAST_PLT_PCREL: u32 = 96;
+/// X1 pipe PC-rel PLT last hword 1
+pub const R_TILEGX_IMM16_X1_HW1_LAST_PLT_PCREL: u32 = 97;
+/// X0 pipe PC-rel PLT last hword 2
+pub const R_TILEGX_IMM16_X0_HW2_LAST_PLT_PCREL: u32 = 98;
+/// X1 pipe PC-rel PLT last hword 2
+pub const R_TILEGX_IMM16_X1_HW2_LAST_PLT_PCREL: u32 = 99;
+/// X0 pipe last hword 0 IE off
+pub const R_TILEGX_IMM16_X0_HW0_LAST_TLS_IE: u32 = 100;
+/// X1 pipe last hword 0 IE off
+pub const R_TILEGX_IMM16_X1_HW0_LAST_TLS_IE: u32 = 101;
+/// X0 pipe last hword 1 IE off
+pub const R_TILEGX_IMM16_X0_HW1_LAST_TLS_IE: u32 = 102;
+/// X1 pipe last hword 1 IE off
+pub const R_TILEGX_IMM16_X1_HW1_LAST_TLS_IE: u32 = 103;
+// Relocs 104-105 are currently not defined.
+/// 64-bit ID of symbol's module
+pub const R_TILEGX_TLS_DTPMOD64: u32 = 106;
+/// 64-bit offset in TLS block
+pub const R_TILEGX_TLS_DTPOFF64: u32 = 107;
+/// 64-bit offset in static TLS block
+pub const R_TILEGX_TLS_TPOFF64: u32 = 108;
+/// 32-bit ID of symbol's module
+pub const R_TILEGX_TLS_DTPMOD32: u32 = 109;
+/// 32-bit offset in TLS block
+pub const R_TILEGX_TLS_DTPOFF32: u32 = 110;
+/// 32-bit offset in static TLS block
+pub const R_TILEGX_TLS_TPOFF32: u32 = 111;
+/// "jal" for TLS GD
+pub const R_TILEGX_TLS_GD_CALL: u32 = 112;
+/// X0 pipe "addi" for TLS GD
+pub const R_TILEGX_IMM8_X0_TLS_GD_ADD: u32 = 113;
+/// X1 pipe "addi" for TLS GD
+pub const R_TILEGX_IMM8_X1_TLS_GD_ADD: u32 = 114;
+/// Y0 pipe "addi" for TLS GD
+pub const R_TILEGX_IMM8_Y0_TLS_GD_ADD: u32 = 115;
+/// Y1 pipe "addi" for TLS GD
+pub const R_TILEGX_IMM8_Y1_TLS_GD_ADD: u32 = 116;
+/// "ld_tls" for TLS IE
+pub const R_TILEGX_TLS_IE_LOAD: u32 = 117;
+/// X0 pipe "addi" for TLS GD/IE
+pub const R_TILEGX_IMM8_X0_TLS_ADD: u32 = 118;
+/// X1 pipe "addi" for TLS GD/IE
+pub const R_TILEGX_IMM8_X1_TLS_ADD: u32 = 119;
+/// Y0 pipe "addi" for TLS GD/IE
+pub const R_TILEGX_IMM8_Y0_TLS_ADD: u32 = 120;
+/// Y1 pipe "addi" for TLS GD/IE
+pub const R_TILEGX_IMM8_Y1_TLS_ADD: u32 = 121;
+
+/// GNU C++ vtable hierarchy
+pub const R_TILEGX_GNU_VTINHERIT: u32 = 128;
+/// GNU C++ vtable member usage
+pub const R_TILEGX_GNU_VTENTRY: u32 = 129;
+
+// RISC-V values `FileHeader*::e_flags`.
+#[allow(missing_docs)]
+pub const EF_RISCV_RVC: u32 = 0x0001;
+#[allow(missing_docs)]
+pub const EF_RISCV_FLOAT_ABI: u32 = 0x0006;
+#[allow(missing_docs)]
+pub const EF_RISCV_FLOAT_ABI_SOFT: u32 = 0x0000;
+#[allow(missing_docs)]
+pub const EF_RISCV_FLOAT_ABI_SINGLE: u32 = 0x0002;
+#[allow(missing_docs)]
+pub const EF_RISCV_FLOAT_ABI_DOUBLE: u32 = 0x0004;
+#[allow(missing_docs)]
+pub const EF_RISCV_FLOAT_ABI_QUAD: u32 = 0x0006;
+
+// RISC-V values `Rel*::r_type`.
+#[allow(missing_docs)]
+pub const R_RISCV_NONE: u32 = 0;
+#[allow(missing_docs)]
+pub const R_RISCV_32: u32 = 1;
+#[allow(missing_docs)]
+pub const R_RISCV_64: u32 = 2;
+#[allow(missing_docs)]
+pub const R_RISCV_RELATIVE: u32 = 3;
+#[allow(missing_docs)]
+pub const R_RISCV_COPY: u32 = 4;
+#[allow(missing_docs)]
+pub const R_RISCV_JUMP_SLOT: u32 = 5;
+#[allow(missing_docs)]
+pub const R_RISCV_TLS_DTPMOD32: u32 = 6;
+#[allow(missing_docs)]
+pub const R_RISCV_TLS_DTPMOD64: u32 = 7;
+#[allow(missing_docs)]
+pub const R_RISCV_TLS_DTPREL32: u32 = 8;
+#[allow(missing_docs)]
+pub const R_RISCV_TLS_DTPREL64: u32 = 9;
+#[allow(missing_docs)]
+pub const R_RISCV_TLS_TPREL32: u32 = 10;
+#[allow(missing_docs)]
+pub const R_RISCV_TLS_TPREL64: u32 = 11;
+#[allow(missing_docs)]
+pub const R_RISCV_BRANCH: u32 = 16;
+#[allow(missing_docs)]
+pub const R_RISCV_JAL: u32 = 17;
+#[allow(missing_docs)]
+pub const R_RISCV_CALL: u32 = 18;
+#[allow(missing_docs)]
+pub const R_RISCV_CALL_PLT: u32 = 19;
+#[allow(missing_docs)]
+pub const R_RISCV_GOT_HI20: u32 = 20;
+#[allow(missing_docs)]
+pub const R_RISCV_TLS_GOT_HI20: u32 = 21;
+#[allow(missing_docs)]
+pub const R_RISCV_TLS_GD_HI20: u32 = 22;
+#[allow(missing_docs)]
+pub const R_RISCV_PCREL_HI20: u32 = 23;
+#[allow(missing_docs)]
+pub const R_RISCV_PCREL_LO12_I: u32 = 24;
+#[allow(missing_docs)]
+pub const R_RISCV_PCREL_LO12_S: u32 = 25;
+#[allow(missing_docs)]
+pub const R_RISCV_HI20: u32 = 26;
+#[allow(missing_docs)]
+pub const R_RISCV_LO12_I: u32 = 27;
+#[allow(missing_docs)]
+pub const R_RISCV_LO12_S: u32 = 28;
+#[allow(missing_docs)]
+pub const R_RISCV_TPREL_HI20: u32 = 29;
+#[allow(missing_docs)]
+pub const R_RISCV_TPREL_LO12_I: u32 = 30;
+#[allow(missing_docs)]
+pub const R_RISCV_TPREL_LO12_S: u32 = 31;
+#[allow(missing_docs)]
+pub const R_RISCV_TPREL_ADD: u32 = 32;
+#[allow(missing_docs)]
+pub const R_RISCV_ADD8: u32 = 33;
+#[allow(missing_docs)]
+pub const R_RISCV_ADD16: u32 = 34;
+#[allow(missing_docs)]
+pub const R_RISCV_ADD32: u32 = 35;
+#[allow(missing_docs)]
+pub const R_RISCV_ADD64: u32 = 36;
+#[allow(missing_docs)]
+pub const R_RISCV_SUB8: u32 = 37;
+#[allow(missing_docs)]
+pub const R_RISCV_SUB16: u32 = 38;
+#[allow(missing_docs)]
+pub const R_RISCV_SUB32: u32 = 39;
+#[allow(missing_docs)]
+pub const R_RISCV_SUB64: u32 = 40;
+#[allow(missing_docs)]
+pub const R_RISCV_GNU_VTINHERIT: u32 = 41;
+#[allow(missing_docs)]
+pub const R_RISCV_GNU_VTENTRY: u32 = 42;
+#[allow(missing_docs)]
+pub const R_RISCV_ALIGN: u32 = 43;
+#[allow(missing_docs)]
+pub const R_RISCV_RVC_BRANCH: u32 = 44;
+#[allow(missing_docs)]
+pub const R_RISCV_RVC_JUMP: u32 = 45;
+#[allow(missing_docs)]
+pub const R_RISCV_RVC_LUI: u32 = 46;
+#[allow(missing_docs)]
+pub const R_RISCV_GPREL_I: u32 = 47;
+#[allow(missing_docs)]
+pub const R_RISCV_GPREL_S: u32 = 48;
+#[allow(missing_docs)]
+pub const R_RISCV_TPREL_I: u32 = 49;
+#[allow(missing_docs)]
+pub const R_RISCV_TPREL_S: u32 = 50;
+#[allow(missing_docs)]
+pub const R_RISCV_RELAX: u32 = 51;
+#[allow(missing_docs)]
+pub const R_RISCV_SUB6: u32 = 52;
+#[allow(missing_docs)]
+pub const R_RISCV_SET6: u32 = 53;
+#[allow(missing_docs)]
+pub const R_RISCV_SET8: u32 = 54;
+#[allow(missing_docs)]
+pub const R_RISCV_SET16: u32 = 55;
+#[allow(missing_docs)]
+pub const R_RISCV_SET32: u32 = 56;
+#[allow(missing_docs)]
+pub const R_RISCV_32_PCREL: u32 = 57;
+
+// BPF values `Rel*::r_type`.
+/// No reloc
+pub const R_BPF_NONE: u32 = 0;
+#[allow(missing_docs)]
+pub const R_BPF_64_64: u32 = 1;
+#[allow(missing_docs)]
+pub const R_BPF_64_32: u32 = 10;
+
+// SBF values `Rel*::r_type`.
+/// No reloc
+pub const R_SBF_NONE: u32 = 0;
+#[allow(missing_docs)]
+pub const R_SBF_64_64: u32 = 1;
+#[allow(missing_docs)]
+pub const R_SBF_64_32: u32 = 10;
+
+// Imagination Meta values `Rel*::r_type`.
+
+#[allow(missing_docs)]
+pub const R_METAG_HIADDR16: u32 = 0;
+#[allow(missing_docs)]
+pub const R_METAG_LOADDR16: u32 = 1;
+/// 32bit absolute address
+pub const R_METAG_ADDR32: u32 = 2;
+/// No reloc
+pub const R_METAG_NONE: u32 = 3;
+#[allow(missing_docs)]
+pub const R_METAG_RELBRANCH: u32 = 4;
+#[allow(missing_docs)]
+pub const R_METAG_GETSETOFF: u32 = 5;
+
+// Backward compatability
+#[allow(missing_docs)]
+pub const R_METAG_REG32OP1: u32 = 6;
+#[allow(missing_docs)]
+pub const R_METAG_REG32OP2: u32 = 7;
+#[allow(missing_docs)]
+pub const R_METAG_REG32OP3: u32 = 8;
+#[allow(missing_docs)]
+pub const R_METAG_REG16OP1: u32 = 9;
+#[allow(missing_docs)]
+pub const R_METAG_REG16OP2: u32 = 10;
+#[allow(missing_docs)]
+pub const R_METAG_REG16OP3: u32 = 11;
+#[allow(missing_docs)]
+pub const R_METAG_REG32OP4: u32 = 12;
+
+#[allow(missing_docs)]
+pub const R_METAG_HIOG: u32 = 13;
+#[allow(missing_docs)]
+pub const R_METAG_LOOG: u32 = 14;
+
+#[allow(missing_docs)]
+pub const R_METAG_REL8: u32 = 15;
+#[allow(missing_docs)]
+pub const R_METAG_REL16: u32 = 16;
+
+#[allow(missing_docs)]
+pub const R_METAG_GNU_VTINHERIT: u32 = 30;
+#[allow(missing_docs)]
+pub const R_METAG_GNU_VTENTRY: u32 = 31;
+
+// PIC relocations
+#[allow(missing_docs)]
+pub const R_METAG_HI16_GOTOFF: u32 = 32;
+#[allow(missing_docs)]
+pub const R_METAG_LO16_GOTOFF: u32 = 33;
+#[allow(missing_docs)]
+pub const R_METAG_GETSET_GOTOFF: u32 = 34;
+#[allow(missing_docs)]
+pub const R_METAG_GETSET_GOT: u32 = 35;
+#[allow(missing_docs)]
+pub const R_METAG_HI16_GOTPC: u32 = 36;
+#[allow(missing_docs)]
+pub const R_METAG_LO16_GOTPC: u32 = 37;
+#[allow(missing_docs)]
+pub const R_METAG_HI16_PLT: u32 = 38;
+#[allow(missing_docs)]
+pub const R_METAG_LO16_PLT: u32 = 39;
+#[allow(missing_docs)]
+pub const R_METAG_RELBRANCH_PLT: u32 = 40;
+#[allow(missing_docs)]
+pub const R_METAG_GOTOFF: u32 = 41;
+#[allow(missing_docs)]
+pub const R_METAG_PLT: u32 = 42;
+#[allow(missing_docs)]
+pub const R_METAG_COPY: u32 = 43;
+#[allow(missing_docs)]
+pub const R_METAG_JMP_SLOT: u32 = 44;
+#[allow(missing_docs)]
+pub const R_METAG_RELATIVE: u32 = 45;
+#[allow(missing_docs)]
+pub const R_METAG_GLOB_DAT: u32 = 46;
+
+// TLS relocations
+#[allow(missing_docs)]
+pub const R_METAG_TLS_GD: u32 = 47;
+#[allow(missing_docs)]
+pub const R_METAG_TLS_LDM: u32 = 48;
+#[allow(missing_docs)]
+pub const R_METAG_TLS_LDO_HI16: u32 = 49;
+#[allow(missing_docs)]
+pub const R_METAG_TLS_LDO_LO16: u32 = 50;
+#[allow(missing_docs)]
+pub const R_METAG_TLS_LDO: u32 = 51;
+#[allow(missing_docs)]
+pub const R_METAG_TLS_IE: u32 = 52;
+#[allow(missing_docs)]
+pub const R_METAG_TLS_IENONPIC: u32 = 53;
+#[allow(missing_docs)]
+pub const R_METAG_TLS_IENONPIC_HI16: u32 = 54;
+#[allow(missing_docs)]
+pub const R_METAG_TLS_IENONPIC_LO16: u32 = 55;
+#[allow(missing_docs)]
+pub const R_METAG_TLS_TPOFF: u32 = 56;
+#[allow(missing_docs)]
+pub const R_METAG_TLS_DTPMOD: u32 = 57;
+#[allow(missing_docs)]
+pub const R_METAG_TLS_DTPOFF: u32 = 58;
+#[allow(missing_docs)]
+pub const R_METAG_TLS_LE: u32 = 59;
+#[allow(missing_docs)]
+pub const R_METAG_TLS_LE_HI16: u32 = 60;
+#[allow(missing_docs)]
+pub const R_METAG_TLS_LE_LO16: u32 = 61;
+
+// NDS32 values `Rel*::r_type`.
+#[allow(missing_docs)]
+pub const R_NDS32_NONE: u32 = 0;
+#[allow(missing_docs)]
+pub const R_NDS32_32_RELA: u32 = 20;
+#[allow(missing_docs)]
+pub const R_NDS32_COPY: u32 = 39;
+#[allow(missing_docs)]
+pub const R_NDS32_GLOB_DAT: u32 = 40;
+#[allow(missing_docs)]
+pub const R_NDS32_JMP_SLOT: u32 = 41;
+#[allow(missing_docs)]
+pub const R_NDS32_RELATIVE: u32 = 42;
+#[allow(missing_docs)]
+pub const R_NDS32_TLS_TPOFF: u32 = 102;
+#[allow(missing_docs)]
+pub const R_NDS32_TLS_DESC: u32 = 119;
+
+// LoongArch values `FileHeader*::e_flags`.
+/// Additional properties of the base ABI type, including the FP calling
+/// convention.
+pub const EF_LARCH_ABI_MODIFIER_MASK: u32 = 0x7;
+/// Uses GPRs and the stack for parameter passing
+pub const EF_LARCH_ABI_SOFT_FLOAT: u32 = 0x1;
+/// Uses GPRs, 32-bit FPRs and the stack for parameter passing
+pub const EF_LARCH_ABI_SINGLE_FLOAT: u32 = 0x2;
+/// Uses GPRs, 64-bit FPRs and the stack for parameter passing
+pub const EF_LARCH_ABI_DOUBLE_FLOAT: u32 = 0x3;
+/// Uses relocation types directly writing to immediate slots
+pub const EF_LARCH_OBJABI_V1: u32 = 0x40;
+
+// LoongArch values `Rel*::r_type`.
+/// No reloc
+pub const R_LARCH_NONE: u32 = 0;
+/// Runtime address resolving
+pub const R_LARCH_32: u32 = 1;
+/// Runtime address resolving
+pub const R_LARCH_64: u32 = 2;
+/// Runtime fixup for load-address
+pub const R_LARCH_RELATIVE: u32 = 3;
+/// Runtime memory copy in executable
+pub const R_LARCH_COPY: u32 = 4;
+/// Runtime PLT supporting
+pub const R_LARCH_JUMP_SLOT: u32 = 5;
+/// Runtime relocation for TLS-GD
+pub const R_LARCH_TLS_DTPMOD32: u32 = 6;
+/// Runtime relocation for TLS-GD
+pub const R_LARCH_TLS_DTPMOD64: u32 = 7;
+/// Runtime relocation for TLS-GD
+pub const R_LARCH_TLS_DTPREL32: u32 = 8;
+/// Runtime relocation for TLS-GD
+pub const R_LARCH_TLS_DTPREL64: u32 = 9;
+/// Runtime relocation for TLE-IE
+pub const R_LARCH_TLS_TPREL32: u32 = 10;
+/// Runtime relocation for TLE-IE
+pub const R_LARCH_TLS_TPREL64: u32 = 11;
+/// Runtime local indirect function resolving
+pub const R_LARCH_IRELATIVE: u32 = 12;
+/// Mark la.abs: load absolute address for static link.
+pub const R_LARCH_MARK_LA: u32 = 20;
+/// Mark external label branch: access PC relative address for static link.
+pub const R_LARCH_MARK_PCREL: u32 = 21;
+/// Push PC-relative offset
+pub const R_LARCH_SOP_PUSH_PCREL: u32 = 22;
+/// Push constant or absolute address
+pub const R_LARCH_SOP_PUSH_ABSOLUTE: u32 = 23;
+/// Duplicate stack top
+pub const R_LARCH_SOP_PUSH_DUP: u32 = 24;
+/// Push for access GOT entry
+pub const R_LARCH_SOP_PUSH_GPREL: u32 = 25;
+/// Push for TLS-LE
+pub const R_LARCH_SOP_PUSH_TLS_TPREL: u32 = 26;
+/// Push for TLS-IE
+pub const R_LARCH_SOP_PUSH_TLS_GOT: u32 = 27;
+/// Push for TLS-GD
+pub const R_LARCH_SOP_PUSH_TLS_GD: u32 = 28;
+/// Push for external function calling
+pub const R_LARCH_SOP_PUSH_PLT_PCREL: u32 = 29;
+/// Assert stack top
+pub const R_LARCH_SOP_ASSERT: u32 = 30;
+/// Stack top logical not (unary)
+pub const R_LARCH_SOP_NOT: u32 = 31;
+/// Stack top subtraction (binary)
+pub const R_LARCH_SOP_SUB: u32 = 32;
+/// Stack top left shift (binary)
+pub const R_LARCH_SOP_SL: u32 = 33;
+/// Stack top right shift (binary)
+pub const R_LARCH_SOP_SR: u32 = 34;
+/// Stack top addition (binary)
+pub const R_LARCH_SOP_ADD: u32 = 35;
+/// Stack top bitwise and (binary)
+pub const R_LARCH_SOP_AND: u32 = 36;
+/// Stack top selection (tertiary)
+pub const R_LARCH_SOP_IF_ELSE: u32 = 37;
+/// Pop stack top to fill 5-bit signed immediate operand
+pub const R_LARCH_SOP_POP_32_S_10_5: u32 = 38;
+/// Pop stack top to fill 12-bit unsigned immediate operand
+pub const R_LARCH_SOP_POP_32_U_10_12: u32 = 39;
+/// Pop stack top to fill 12-bit signed immediate operand
+pub const R_LARCH_SOP_POP_32_S_10_12: u32 = 40;
+/// Pop stack top to fill 16-bit signed immediate operand
+pub const R_LARCH_SOP_POP_32_S_10_16: u32 = 41;
+/// Pop stack top to fill 18-bit signed immediate operand with two trailing
+/// zeros implied
+pub const R_LARCH_SOP_POP_32_S_10_16_S2: u32 = 42;
+/// Pop stack top to fill 20-bit signed immediate operand
+pub const R_LARCH_SOP_POP_32_S_5_20: u32 = 43;
+/// Pop stack top to fill 23-bit signed immediate operand with two trailing
+/// zeros implied
+pub const R_LARCH_SOP_POP_32_S_0_5_10_16_S2: u32 = 44;
+/// Pop stack top to fill 28-bit signed immediate operand with two trailing
+/// zeros implied
+pub const R_LARCH_SOP_POP_32_S_0_10_10_16_S2: u32 = 45;
+/// Pop stack top to fill an instruction
+pub const R_LARCH_SOP_POP_32_U: u32 = 46;
+/// 8-bit in-place addition
+pub const R_LARCH_ADD8: u32 = 47;
+/// 16-bit in-place addition
+pub const R_LARCH_ADD16: u32 = 48;
+/// 24-bit in-place addition
+pub const R_LARCH_ADD24: u32 = 49;
+/// 32-bit in-place addition
+pub const R_LARCH_ADD32: u32 = 50;
+/// 64-bit in-place addition
+pub const R_LARCH_ADD64: u32 = 51;
+/// 8-bit in-place subtraction
+pub const R_LARCH_SUB8: u32 = 52;
+/// 16-bit in-place subtraction
+pub const R_LARCH_SUB16: u32 = 53;
+/// 24-bit in-place subtraction
+pub const R_LARCH_SUB24: u32 = 54;
+/// 32-bit in-place subtraction
+pub const R_LARCH_SUB32: u32 = 55;
+/// 64-bit in-place subtraction
+pub const R_LARCH_SUB64: u32 = 56;
+/// GNU C++ vtable hierarchy
+pub const R_LARCH_GNU_VTINHERIT: u32 = 57;
+/// GNU C++ vtable member usage
+pub const R_LARCH_GNU_VTENTRY: u32 = 58;
+/// 18-bit PC-relative jump offset with two trailing zeros
+pub const R_LARCH_B16: u32 = 64;
+/// 23-bit PC-relative jump offset with two trailing zeros
+pub const R_LARCH_B21: u32 = 65;
+/// 28-bit PC-relative jump offset with two trailing zeros
+pub const R_LARCH_B26: u32 = 66;
+/// 12..=31 bits of 32/64-bit absolute address
+pub const R_LARCH_ABS_HI20: u32 = 67;
+/// 0..=11 bits of 32/64-bit absolute address
+pub const R_LARCH_ABS_LO12: u32 = 68;
+/// 32..=51 bits of 64-bit absolute address
+pub const R_LARCH_ABS64_LO20: u32 = 69;
+/// 52..=63 bits of 64-bit absolute address
+pub const R_LARCH_ABS64_HI12: u32 = 70;
+/// The signed 32-bit offset `offs` from `PC & 0xfffff000` to
+/// `(S + A + 0x800) & 0xfffff000`, with 12 trailing zeros removed.
+///
+/// We define the *PC relative anchor* for `S + A` as `PC + offs` (`offs`
+/// is sign-extended to VA bits).
+pub const R_LARCH_PCALA_HI20: u32 = 71;
+/// Same as R_LARCH_ABS_LO12.  0..=11 bits of the 32/64-bit offset from the
+/// [PC relative anchor][R_LARCH_PCALA_HI20].
+pub const R_LARCH_PCALA_LO12: u32 = 72;
+/// 32..=51 bits of the 64-bit offset from the
+/// [PC relative anchor][R_LARCH_PCALA_HI20].
+pub const R_LARCH_PCALA64_LO20: u32 = 73;
+/// 52..=63 bits of the 64-bit offset from the
+/// [PC relative anchor][R_LARCH_PCALA_HI20].
+pub const R_LARCH_PCALA64_HI12: u32 = 74;
+/// The signed 32-bit offset `offs` from `PC & 0xfffff000` to
+/// `(GP + G + 0x800) & 0xfffff000`, with 12 trailing zeros removed.
+///
+/// We define the *PC relative anchor* for the GOT entry at `GP + G` as
+/// `PC + offs` (`offs` is sign-extended to VA bits).
+pub const R_LARCH_GOT_PC_HI20: u32 = 75;
+/// 0..=11 bits of the 32/64-bit offset from the
+/// [PC relative anchor][R_LARCH_GOT_PC_HI20] to the GOT entry.
+pub const R_LARCH_GOT_PC_LO12: u32 = 76;
+/// 32..=51 bits of the 64-bit offset from the
+/// [PC relative anchor][R_LARCH_GOT_PC_HI20] to the GOT entry.
+pub const R_LARCH_GOT64_PC_LO20: u32 = 77;
+/// 52..=63 bits of the 64-bit offset from the
+/// [PC relative anchor][R_LARCH_GOT_PC_HI20] to the GOT entry.
+pub const R_LARCH_GOT64_PC_HI12: u32 = 78;
+/// 12..=31 bits of 32/64-bit GOT entry absolute address
+pub const R_LARCH_GOT_HI20: u32 = 79;
+/// 0..=11 bits of 32/64-bit GOT entry absolute address
+pub const R_LARCH_GOT_LO12: u32 = 80;
+/// 32..=51 bits of 64-bit GOT entry absolute address
+pub const R_LARCH_GOT64_LO20: u32 = 81;
+/// 52..=63 bits of 64-bit GOT entry absolute address
+pub const R_LARCH_GOT64_HI12: u32 = 82;
+/// 12..=31 bits of TLS LE 32/64-bit offset from thread pointer
+pub const R_LARCH_TLS_LE_HI20: u32 = 83;
+/// 0..=11 bits of TLS LE 32/64-bit offset from thread pointer
+pub const R_LARCH_TLS_LE_LO12: u32 = 84;
+/// 32..=51 bits of TLS LE 64-bit offset from thread pointer
+pub const R_LARCH_TLS_LE64_LO20: u32 = 85;
+/// 52..=63 bits of TLS LE 64-bit offset from thread pointer
+pub const R_LARCH_TLS_LE64_HI12: u32 = 86;
+/// The signed 32-bit offset `offs` from `PC & 0xfffff000` to
+/// `(GP + IE + 0x800) & 0xfffff000`, with 12 trailing zeros removed.
+///
+/// We define the *PC relative anchor* for the TLS IE GOT entry at
+/// `GP + IE` as `PC + offs` (`offs` is sign-extended to VA bits).
+pub const R_LARCH_TLS_IE_PC_HI20: u32 = 87;
+/// 0..=12 bits of the 32/64-bit offset from the
+/// [PC-relative anchor][R_LARCH_TLS_IE_PC_HI20] to the TLS IE GOT entry.
+pub const R_LARCH_TLS_IE_PC_LO12: u32 = 88;
+/// 32..=51 bits of the 64-bit offset from the
+/// [PC-relative anchor][R_LARCH_TLS_IE_PC_HI20] to the TLS IE GOT entry.
+pub const R_LARCH_TLS_IE64_PC_LO20: u32 = 89;
+/// 52..=63 bits of the 64-bit offset from the
+/// [PC-relative anchor][R_LARCH_TLS_IE_PC_HI20] to the TLS IE GOT entry.
+pub const R_LARCH_TLS_IE64_PC_HI12: u32 = 90;
+/// 12..=31 bits of TLS IE GOT entry 32/64-bit absolute address
+pub const R_LARCH_TLS_IE_HI20: u32 = 91;
+/// 0..=11 bits of TLS IE GOT entry 32/64-bit absolute address
+pub const R_LARCH_TLS_IE_LO12: u32 = 92;
+/// 32..=51 bits of TLS IE GOT entry 64-bit absolute address
+pub const R_LARCH_TLS_IE64_LO20: u32 = 93;
+/// 51..=63 bits of TLS IE GOT entry 64-bit absolute address
+pub const R_LARCH_TLS_IE64_HI12: u32 = 94;
+/// 12..=31 bits of the offset from `PC` to `GP + GD + 0x800`, where
+/// `GP + GD` is a TLS LD GOT entry
+pub const R_LARCH_TLS_LD_PC_HI20: u32 = 95;
+/// 12..=31 bits of TLS LD GOT entry 32/64-bit absolute address
+pub const R_LARCH_TLS_LD_HI20: u32 = 96;
+/// 12..=31 bits of the 32/64-bit PC-relative offset to the PC-relative
+/// anchor for the TLE GD GOT entry.
+pub const R_LARCH_TLS_GD_PC_HI20: u32 = 97;
+/// 12..=31 bits of TLS GD GOT entry 32/64-bit absolute address
+pub const R_LARCH_TLS_GD_HI20: u32 = 98;
+/// 32-bit PC relative
+pub const R_LARCH_32_PCREL: u32 = 99;
+/// Paired with a normal relocation at the same address to indicate the
+/// insturction can be relaxed
+pub const R_LARCH_RELAX: u32 = 100;
+
+// Xtensa values Rel*::r_type`.
+#[allow(missing_docs)]
+pub const R_XTENSA_NONE: u32 = 0;
+#[allow(missing_docs)]
+pub const R_XTENSA_32: u32 = 1;
+#[allow(missing_docs)]
+pub const R_XTENSA_RTLD: u32 = 2;
+#[allow(missing_docs)]
+pub const R_XTENSA_GLOB_DAT: u32 = 3;
+#[allow(missing_docs)]
+pub const R_XTENSA_JMP_SLOT: u32 = 4;
+#[allow(missing_docs)]
+pub const R_XTENSA_RELATIVE: u32 = 5;
+#[allow(missing_docs)]
+pub const R_XTENSA_PLT: u32 = 6;
+#[allow(missing_docs)]
+pub const R_XTENSA_OP0: u32 = 8;
+#[allow(missing_docs)]
+pub const R_XTENSA_OP1: u32 = 9;
+#[allow(missing_docs)]
+pub const R_XTENSA_OP2: u32 = 10;
+#[allow(missing_docs)]
+pub const R_XTENSA_ASM_EXPAND: u32 = 11;
+#[allow(missing_docs)]
+pub const R_XTENSA_ASM_SIMPLIFY: u32 = 12;
+#[allow(missing_docs)]
+pub const R_XTENSA_32_PCREL: u32 = 14;
+#[allow(missing_docs)]
+pub const R_XTENSA_GNU_VTINHERIT: u32 = 15;
+#[allow(missing_docs)]
+pub const R_XTENSA_GNU_VTENTRY: u32 = 16;
+#[allow(missing_docs)]
+pub const R_XTENSA_DIFF8: u32 = 17;
+#[allow(missing_docs)]
+pub const R_XTENSA_DIFF16: u32 = 18;
+#[allow(missing_docs)]
+pub const R_XTENSA_DIFF32: u32 = 19;
+#[allow(missing_docs)]
+pub const R_XTENSA_SLOT0_OP: u32 = 20;
+#[allow(missing_docs)]
+pub const R_XTENSA_SLOT1_OP: u32 = 21;
+#[allow(missing_docs)]
+pub const R_XTENSA_SLOT2_OP: u32 = 22;
+#[allow(missing_docs)]
+pub const R_XTENSA_SLOT3_OP: u32 = 23;
+#[allow(missing_docs)]
+pub const R_XTENSA_SLOT4_OP: u32 = 24;
+#[allow(missing_docs)]
+pub const R_XTENSA_SLOT5_OP: u32 = 25;
+#[allow(missing_docs)]
+pub const R_XTENSA_SLOT6_OP: u32 = 26;
+#[allow(missing_docs)]
+pub const R_XTENSA_SLOT7_OP: u32 = 27;
+#[allow(missing_docs)]
+pub const R_XTENSA_SLOT8_OP: u32 = 28;
+#[allow(missing_docs)]
+pub const R_XTENSA_SLOT9_OP: u32 = 29;
+#[allow(missing_docs)]
+pub const R_XTENSA_SLOT10_OP: u32 = 30;
+#[allow(missing_docs)]
+pub const R_XTENSA_SLOT11_OP: u32 = 31;
+#[allow(missing_docs)]
+pub const R_XTENSA_SLOT12_OP: u32 = 32;
+#[allow(missing_docs)]
+pub const R_XTENSA_SLOT13_OP: u32 = 33;
+#[allow(missing_docs)]
+pub const R_XTENSA_SLOT14_OP: u32 = 34;
+#[allow(missing_docs)]
+pub const R_XTENSA_SLOT0_ALT: u32 = 35;
+#[allow(missing_docs)]
+pub const R_XTENSA_SLOT1_ALT: u32 = 36;
+#[allow(missing_docs)]
+pub const R_XTENSA_SLOT2_ALT: u32 = 37;
+#[allow(missing_docs)]
+pub const R_XTENSA_SLOT3_ALT: u32 = 38;
+#[allow(missing_docs)]
+pub const R_XTENSA_SLOT4_ALT: u32 = 39;
+#[allow(missing_docs)]
+pub const R_XTENSA_SLOT5_ALT: u32 = 40;
+#[allow(missing_docs)]
+pub const R_XTENSA_SLOT6_ALT: u32 = 41;
+#[allow(missing_docs)]
+pub const R_XTENSA_SLOT7_ALT: u32 = 42;
+#[allow(missing_docs)]
+pub const R_XTENSA_SLOT8_ALT: u32 = 43;
+#[allow(missing_docs)]
+pub const R_XTENSA_SLOT9_ALT: u32 = 44;
+#[allow(missing_docs)]
+pub const R_XTENSA_SLOT10_ALT: u32 = 45;
+#[allow(missing_docs)]
+pub const R_XTENSA_SLOT11_ALT: u32 = 46;
+#[allow(missing_docs)]
+pub const R_XTENSA_SLOT12_ALT: u32 = 47;
+#[allow(missing_docs)]
+pub const R_XTENSA_SLOT13_ALT: u32 = 48;
+#[allow(missing_docs)]
+pub const R_XTENSA_SLOT14_ALT: u32 = 49;
+#[allow(missing_docs)]
+pub const R_XTENSA_TLSDESC_FN: u32 = 50;
+#[allow(missing_docs)]
+pub const R_XTENSA_TLSDESC_ARG: u32 = 51;
+#[allow(missing_docs)]
+pub const R_XTENSA_TLS_DTPOFF: u32 = 52;
+#[allow(missing_docs)]
+pub const R_XTENSA_TLS_TPOFF: u32 = 53;
+#[allow(missing_docs)]
+pub const R_XTENSA_TLS_FUNC: u32 = 54;
+#[allow(missing_docs)]
+pub const R_XTENSA_TLS_ARG: u32 = 55;
+#[allow(missing_docs)]
+pub const R_XTENSA_TLS_CALL: u32 = 56;
+#[allow(missing_docs)]
+pub const R_XTENSA_PDIFF8: u32 = 57;
+#[allow(missing_docs)]
+pub const R_XTENSA_PDIFF16: u32 = 58;
+#[allow(missing_docs)]
+pub const R_XTENSA_PDIFF32: u32 = 59;
+#[allow(missing_docs)]
+pub const R_XTENSA_NDIFF8: u32 = 60;
+#[allow(missing_docs)]
+pub const R_XTENSA_NDIFF16: u32 = 61;
+#[allow(missing_docs)]
+pub const R_XTENSA_NDIFF32: u32 = 62;
+
+unsafe_impl_endian_pod!(
+    FileHeader32,
+    FileHeader64,
+    SectionHeader32,
+    SectionHeader64,
+    CompressionHeader32,
+    CompressionHeader64,
+    Sym32,
+    Sym64,
+    Syminfo32,
+    Syminfo64,
+    Rel32,
+    Rel64,
+    Rela32,
+    Rela64,
+    ProgramHeader32,
+    ProgramHeader64,
+    Dyn32,
+    Dyn64,
+    Versym,
+    Verdef,
+    Verdaux,
+    Verneed,
+    Vernaux,
+    NoteHeader32,
+    NoteHeader64,
+    HashHeader,
+    GnuHashHeader,
+);
diff --git a/third_party/rust/object/src/endian.rs b/third_party/rust/object/src/endian.rs
new file mode 100644
index 0000000000..1287aa6547
--- /dev/null
+++ b/third_party/rust/object/src/endian.rs
@@ -0,0 +1,771 @@
+//! Types for compile-time and run-time endianness.
+
+use crate::pod::Pod;
+use core::fmt::{self, Debug};
+use core::marker::PhantomData;
+
+/// A trait for using an endianness specification.
+///
+/// Provides methods for converting between the specified endianness and
+/// the native endianness of the target machine.
+///
+/// This trait does not require that the endianness is known at compile time.
+pub trait Endian: Debug + Default + Clone + Copy + PartialEq + Eq + 'static {
+    /// Construct a specification for the endianness of some values.
+    ///
+    /// Returns `None` if the type does not support specifying the given endianness.
+    fn from_big_endian(big_endian: bool) -> Option<Self>;
+
+    /// Construct a specification for the endianness of some values.
+    ///
+    /// Returns `None` if the type does not support specifying the given endianness.
+    fn from_little_endian(little_endian: bool) -> Option<Self> {
+        Self::from_big_endian(!little_endian)
+    }
+
+    /// Return true for big endian byte order.
+    fn is_big_endian(self) -> bool;
+
+    /// Return true for little endian byte order.
+    #[inline]
+    fn is_little_endian(self) -> bool {
+        !self.is_big_endian()
+    }
+
+    /// Converts an unsigned 16 bit integer to native endian.
+    #[inline]
+    fn read_u16(self, n: u16) -> u16 {
+        if self.is_big_endian() {
+            u16::from_be(n)
+        } else {
+            u16::from_le(n)
+        }
+    }
+
+    /// Converts an unsigned 32 bit integer to native endian.
+    #[inline]
+    fn read_u32(self, n: u32) -> u32 {
+        if self.is_big_endian() {
+            u32::from_be(n)
+        } else {
+            u32::from_le(n)
+        }
+    }
+
+    /// Converts an unsigned 64 bit integer to native endian.
+    #[inline]
+    fn read_u64(self, n: u64) -> u64 {
+        if self.is_big_endian() {
+            u64::from_be(n)
+        } else {
+            u64::from_le(n)
+        }
+    }
+
+    /// Converts a signed 16 bit integer to native endian.
+    #[inline]
+    fn read_i16(self, n: i16) -> i16 {
+        if self.is_big_endian() {
+            i16::from_be(n)
+        } else {
+            i16::from_le(n)
+        }
+    }
+
+    /// Converts a signed 32 bit integer to native endian.
+    #[inline]
+    fn read_i32(self, n: i32) -> i32 {
+        if self.is_big_endian() {
+            i32::from_be(n)
+        } else {
+            i32::from_le(n)
+        }
+    }
+
+    /// Converts a signed 64 bit integer to native endian.
+    #[inline]
+    fn read_i64(self, n: i64) -> i64 {
+        if self.is_big_endian() {
+            i64::from_be(n)
+        } else {
+            i64::from_le(n)
+        }
+    }
+
+    /// Converts an unaligned unsigned 16 bit integer to native endian.
+    #[inline]
+    fn read_u16_bytes(self, n: [u8; 2]) -> u16 {
+        if self.is_big_endian() {
+            u16::from_be_bytes(n)
+        } else {
+            u16::from_le_bytes(n)
+        }
+    }
+
+    /// Converts an unaligned unsigned 32 bit integer to native endian.
+    #[inline]
+    fn read_u32_bytes(self, n: [u8; 4]) -> u32 {
+        if self.is_big_endian() {
+            u32::from_be_bytes(n)
+        } else {
+            u32::from_le_bytes(n)
+        }
+    }
+
+    /// Converts an unaligned unsigned 64 bit integer to native endian.
+    #[inline]
+    fn read_u64_bytes(self, n: [u8; 8]) -> u64 {
+        if self.is_big_endian() {
+            u64::from_be_bytes(n)
+        } else {
+            u64::from_le_bytes(n)
+        }
+    }
+
+    /// Converts an unaligned signed 16 bit integer to native endian.
+    #[inline]
+    fn read_i16_bytes(self, n: [u8; 2]) -> i16 {
+        if self.is_big_endian() {
+            i16::from_be_bytes(n)
+        } else {
+            i16::from_le_bytes(n)
+        }
+    }
+
+    /// Converts an unaligned signed 32 bit integer to native endian.
+    #[inline]
+    fn read_i32_bytes(self, n: [u8; 4]) -> i32 {
+        if self.is_big_endian() {
+            i32::from_be_bytes(n)
+        } else {
+            i32::from_le_bytes(n)
+        }
+    }
+
+    /// Converts an unaligned signed 64 bit integer to native endian.
+    #[inline]
+    fn read_i64_bytes(self, n: [u8; 8]) -> i64 {
+        if self.is_big_endian() {
+            i64::from_be_bytes(n)
+        } else {
+            i64::from_le_bytes(n)
+        }
+    }
+
+    /// Converts an unsigned 16 bit integer from native endian.
+    #[inline]
+    fn write_u16(self, n: u16) -> u16 {
+        if self.is_big_endian() {
+            u16::to_be(n)
+        } else {
+            u16::to_le(n)
+        }
+    }
+
+    /// Converts an unsigned 32 bit integer from native endian.
+    #[inline]
+    fn write_u32(self, n: u32) -> u32 {
+        if self.is_big_endian() {
+            u32::to_be(n)
+        } else {
+            u32::to_le(n)
+        }
+    }
+
+    /// Converts an unsigned 64 bit integer from native endian.
+    #[inline]
+    fn write_u64(self, n: u64) -> u64 {
+        if self.is_big_endian() {
+            u64::to_be(n)
+        } else {
+            u64::to_le(n)
+        }
+    }
+
+    /// Converts a signed 16 bit integer from native endian.
+    #[inline]
+    fn write_i16(self, n: i16) -> i16 {
+        if self.is_big_endian() {
+            i16::to_be(n)
+        } else {
+            i16::to_le(n)
+        }
+    }
+
+    /// Converts a signed 32 bit integer from native endian.
+    #[inline]
+    fn write_i32(self, n: i32) -> i32 {
+        if self.is_big_endian() {
+            i32::to_be(n)
+        } else {
+            i32::to_le(n)
+        }
+    }
+
+    /// Converts a signed 64 bit integer from native endian.
+    #[inline]
+    fn write_i64(self, n: i64) -> i64 {
+        if self.is_big_endian() {
+            i64::to_be(n)
+        } else {
+            i64::to_le(n)
+        }
+    }
+
+    /// Converts an unaligned unsigned 16 bit integer from native endian.
+    #[inline]
+    fn write_u16_bytes(self, n: u16) -> [u8; 2] {
+        if self.is_big_endian() {
+            u16::to_be_bytes(n)
+        } else {
+            u16::to_le_bytes(n)
+        }
+    }
+
+    /// Converts an unaligned unsigned 32 bit integer from native endian.
+    #[inline]
+    fn write_u32_bytes(self, n: u32) -> [u8; 4] {
+        if self.is_big_endian() {
+            u32::to_be_bytes(n)
+        } else {
+            u32::to_le_bytes(n)
+        }
+    }
+
+    /// Converts an unaligned unsigned 64 bit integer from native endian.
+    #[inline]
+    fn write_u64_bytes(self, n: u64) -> [u8; 8] {
+        if self.is_big_endian() {
+            u64::to_be_bytes(n)
+        } else {
+            u64::to_le_bytes(n)
+        }
+    }
+
+    /// Converts an unaligned signed 16 bit integer from native endian.
+    #[inline]
+    fn write_i16_bytes(self, n: i16) -> [u8; 2] {
+        if self.is_big_endian() {
+            i16::to_be_bytes(n)
+        } else {
+            i16::to_le_bytes(n)
+        }
+    }
+
+    /// Converts an unaligned signed 32 bit integer from native endian.
+    #[inline]
+    fn write_i32_bytes(self, n: i32) -> [u8; 4] {
+        if self.is_big_endian() {
+            i32::to_be_bytes(n)
+        } else {
+            i32::to_le_bytes(n)
+        }
+    }
+
+    /// Converts an unaligned signed 64 bit integer from native endian.
+    #[inline]
+    fn write_i64_bytes(self, n: i64) -> [u8; 8] {
+        if self.is_big_endian() {
+            i64::to_be_bytes(n)
+        } else {
+            i64::to_le_bytes(n)
+        }
+    }
+}
+
+/// An endianness that is selectable at run-time.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub enum Endianness {
+    /// Little endian byte order.
+    Little,
+    /// Big endian byte order.
+    Big,
+}
+
+impl Default for Endianness {
+    #[cfg(target_endian = "little")]
+    #[inline]
+    fn default() -> Endianness {
+        Endianness::Little
+    }
+
+    #[cfg(target_endian = "big")]
+    #[inline]
+    fn default() -> Endianness {
+        Endianness::Big
+    }
+}
+
+impl Endian for Endianness {
+    #[inline]
+    fn from_big_endian(big_endian: bool) -> Option<Self> {
+        Some(if big_endian {
+            Endianness::Big
+        } else {
+            Endianness::Little
+        })
+    }
+
+    #[inline]
+    fn is_big_endian(self) -> bool {
+        self != Endianness::Little
+    }
+}
+
+/// Compile-time little endian byte order.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub struct LittleEndian;
+
+impl Default for LittleEndian {
+    #[inline]
+    fn default() -> LittleEndian {
+        LittleEndian
+    }
+}
+
+impl Endian for LittleEndian {
+    #[inline]
+    fn from_big_endian(big_endian: bool) -> Option<Self> {
+        if big_endian {
+            None
+        } else {
+            Some(LittleEndian)
+        }
+    }
+
+    #[inline]
+    fn is_big_endian(self) -> bool {
+        false
+    }
+}
+
+/// Compile-time big endian byte order.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub struct BigEndian;
+
+impl Default for BigEndian {
+    #[inline]
+    fn default() -> BigEndian {
+        BigEndian
+    }
+}
+
+impl Endian for BigEndian {
+    #[inline]
+    fn from_big_endian(big_endian: bool) -> Option<Self> {
+        if big_endian {
+            Some(BigEndian)
+        } else {
+            None
+        }
+    }
+
+    #[inline]
+    fn is_big_endian(self) -> bool {
+        true
+    }
+}
+
+/// The native endianness for the target platform.
+#[cfg(target_endian = "little")]
+pub type NativeEndian = LittleEndian;
+
+#[cfg(target_endian = "little")]
+#[allow(non_upper_case_globals)]
+#[doc(hidden)]
+pub const NativeEndian: LittleEndian = LittleEndian;
+
+/// The native endianness for the target platform.
+#[cfg(target_endian = "big")]
+pub type NativeEndian = BigEndian;
+
+#[cfg(target_endian = "big")]
+#[allow(non_upper_case_globals)]
+#[doc(hidden)]
+pub const NativeEndian: BigEndian = BigEndian;
+
+macro_rules! unsafe_impl_endian_pod {
+    ($($struct_name:ident),+ $(,)?) => {
+        $(
+            unsafe impl<E: Endian> Pod for $struct_name<E> { }
+        )+
+    }
+}
+
+#[cfg(not(feature = "unaligned"))]
+mod aligned {
+    use super::{fmt, Endian, PhantomData, Pod};
+
+    /// A `u16` value with an externally specified endianness of type `E`.
+    #[derive(Default, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+    #[repr(transparent)]
+    pub struct U16<E: Endian>(u16, PhantomData<E>);
+
+    impl<E: Endian> U16<E> {
+        /// Construct a new value given a native endian value.
+        pub fn new(e: E, n: u16) -> Self {
+            Self(e.write_u16(n), PhantomData)
+        }
+
+        /// Return the value as a native endian value.
+        pub fn get(self, e: E) -> u16 {
+            e.read_u16(self.0)
+        }
+
+        /// Set the value given a native endian value.
+        pub fn set(&mut self, e: E, n: u16) {
+            self.0 = e.write_u16(n);
+        }
+    }
+
+    /// A `u32` value with an externally specified endianness of type `E`.
+    #[derive(Default, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+    #[repr(transparent)]
+    pub struct U32<E: Endian>(u32, PhantomData<E>);
+
+    impl<E: Endian> U32<E> {
+        /// Construct a new value given a native endian value.
+        pub fn new(e: E, n: u32) -> Self {
+            Self(e.write_u32(n), PhantomData)
+        }
+        /// Return the value as a native endian value.
+        pub fn get(self, e: E) -> u32 {
+            e.read_u32(self.0)
+        }
+        /// Set the value given a native endian value.
+        pub fn set(&mut self, e: E, n: u32) {
+            self.0 = e.write_u32(n);
+        }
+    }
+
+    /// A `u64` value with an externally specified endianness of type `E`.
+    #[derive(Default, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+    #[repr(transparent)]
+    pub struct U64<E: Endian>(u64, PhantomData<E>);
+
+    impl<E: Endian> U64<E> {
+        /// Construct a new value given a native endian value.
+        pub fn new(e: E, n: u64) -> Self {
+            Self(e.write_u64(n), PhantomData)
+        }
+        /// Return the value as a native endian value.
+        pub fn get(self, e: E) -> u64 {
+            e.read_u64(self.0)
+        }
+        /// Set the value given a native endian value.
+        pub fn set(&mut self, e: E, n: u64) {
+            self.0 = e.write_u64(n);
+        }
+    }
+
+    /// An `i16` value with an externally specified endianness of type `E`.
+    #[derive(Default, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+    #[repr(transparent)]
+    pub struct I16<E: Endian>(i16, PhantomData<E>);
+
+    impl<E: Endian> I16<E> {
+        /// Construct a new value given a native endian value.
+        pub fn new(e: E, n: i16) -> Self {
+            Self(e.write_i16(n), PhantomData)
+        }
+        /// Return the value as a native endian value.
+        pub fn get(self, e: E) -> i16 {
+            e.read_i16(self.0)
+        }
+        /// Set the value given a native endian value.
+        pub fn set(&mut self, e: E, n: i16) {
+            self.0 = e.write_i16(n);
+        }
+    }
+
+    /// An `i32` value with an externally specified endianness of type `E`.
+    #[derive(Default, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+    #[repr(transparent)]
+    pub struct I32<E: Endian>(i32, PhantomData<E>);
+
+    impl<E: Endian> I32<E> {
+        /// Construct a new value given a native endian value.
+        pub fn new(e: E, n: i32) -> Self {
+            Self(e.write_i32(n), PhantomData)
+        }
+        /// Return the value as a native endian value.
+        pub fn get(self, e: E) -> i32 {
+            e.read_i32(self.0)
+        }
+        /// Set the value given a native endian value.
+        pub fn set(&mut self, e: E, n: i32) {
+            self.0 = e.write_i32(n);
+        }
+    }
+
+    /// An `i64` value with an externally specified endianness of type `E`.
+    #[derive(Default, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+    #[repr(transparent)]
+    pub struct I64<E: Endian>(i64, PhantomData<E>);
+
+    impl<E: Endian> I64<E> {
+        /// Construct a new value given a native endian value.
+        pub fn new(e: E, n: i64) -> Self {
+            Self(e.write_i64(n), PhantomData)
+        }
+        /// Return the value as a native endian value.
+        pub fn get(self, e: E) -> i64 {
+            e.read_i64(self.0)
+        }
+        /// Set the value given a native endian value.
+        pub fn set(&mut self, e: E, n: i64) {
+            self.0 = e.write_i64(n);
+        }
+    }
+
+    impl<E: Endian> fmt::Debug for U16<E> {
+        fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+            write!(f, "U16({:x})", self.0)
+        }
+    }
+
+    impl<E: Endian> fmt::Debug for U32<E> {
+        fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+            write!(f, "U32({:x})", self.0)
+        }
+    }
+
+    impl<E: Endian> fmt::Debug for U64<E> {
+        fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+            write!(f, "U64({:x})", self.0)
+        }
+    }
+
+    impl<E: Endian> fmt::Debug for I16<E> {
+        fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+            write!(f, "I16({:x})", self.0)
+        }
+    }
+
+    impl<E: Endian> fmt::Debug for I32<E> {
+        fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+            write!(f, "I32({:x})", self.0)
+        }
+    }
+
+    impl<E: Endian> fmt::Debug for I64<E> {
+        fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+            write!(f, "I64({:x})", self.0)
+        }
+    }
+
+    unsafe_impl_endian_pod!(U16, U32, U64, I16, I32, I64);
+}
+
+#[cfg(not(feature = "unaligned"))]
+pub use aligned::*;
+
+/// A `u16` value with an externally specified endianness of type `E`.
+#[cfg(feature = "unaligned")]
+pub type U16<E> = U16Bytes<E>;
+
+/// A `u32` value with an externally specified endianness of type `E`.
+#[cfg(feature = "unaligned")]
+pub type U32<E> = U32Bytes<E>;
+
+/// A `u64` value with an externally specified endianness of type `E`.
+#[cfg(feature = "unaligned")]
+pub type U64<E> = U64Bytes<E>;
+
+/// An `i16` value with an externally specified endianness of type `E`.
+#[cfg(feature = "unaligned")]
+pub type I16<E> = I16Bytes<E>;
+
+/// An `i32` value with an externally specified endianness of type `E`.
+#[cfg(feature = "unaligned")]
+pub type I32<E> = I32Bytes<E>;
+
+/// An `i64` value with an externally specified endianness of type `E`.
+#[cfg(feature = "unaligned")]
+pub type I64<E> = I64Bytes<E>;
+
+/// An unaligned `u16` value with an externally specified endianness of type `E`.
+#[derive(Default, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[repr(transparent)]
+pub struct U16Bytes<E: Endian>([u8; 2], PhantomData<E>);
+
+impl<E: Endian> U16Bytes<E> {
+    /// Construct a new value given a native endian value.
+    pub fn new(e: E, n: u16) -> Self {
+        Self(e.write_u16_bytes(n), PhantomData)
+    }
+
+    /// Return the value as a native endian value.
+    pub fn get(self, e: E) -> u16 {
+        e.read_u16_bytes(self.0)
+    }
+
+    /// Set the value given a native endian value.
+    pub fn set(&mut self, e: E, n: u16) {
+        self.0 = e.write_u16_bytes(n);
+    }
+}
+
+/// An unaligned `u32` value with an externally specified endianness of type `E`.
+#[derive(Default, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[repr(transparent)]
+pub struct U32Bytes<E: Endian>([u8; 4], PhantomData<E>);
+
+impl<E: Endian> U32Bytes<E> {
+    /// Construct a new value given a native endian value.
+    pub fn new(e: E, n: u32) -> Self {
+        Self(e.write_u32_bytes(n), PhantomData)
+    }
+
+    /// Return the value as a native endian value.
+    pub fn get(self, e: E) -> u32 {
+        e.read_u32_bytes(self.0)
+    }
+
+    /// Set the value given a native endian value.
+    pub fn set(&mut self, e: E, n: u32) {
+        self.0 = e.write_u32_bytes(n);
+    }
+}
+
+/// An unaligned `u64` value with an externally specified endianness of type `E`.
+#[derive(Default, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[repr(transparent)]
+pub struct U64Bytes<E: Endian>([u8; 8], PhantomData<E>);
+
+impl<E: Endian> U64Bytes<E> {
+    /// Construct a new value given a native endian value.
+    pub fn new(e: E, n: u64) -> Self {
+        Self(e.write_u64_bytes(n), PhantomData)
+    }
+
+    /// Return the value as a native endian value.
+    pub fn get(self, e: E) -> u64 {
+        e.read_u64_bytes(self.0)
+    }
+
+    /// Set the value given a native endian value.
+    pub fn set(&mut self, e: E, n: u64) {
+        self.0 = e.write_u64_bytes(n);
+    }
+}
+
+/// An unaligned `i16` value with an externally specified endianness of type `E`.
+#[derive(Default, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[repr(transparent)]
+pub struct I16Bytes<E: Endian>([u8; 2], PhantomData<E>);
+
+impl<E: Endian> I16Bytes<E> {
+    /// Construct a new value given a native endian value.
+    pub fn new(e: E, n: i16) -> Self {
+        Self(e.write_i16_bytes(n), PhantomData)
+    }
+
+    /// Return the value as a native endian value.
+    pub fn get(self, e: E) -> i16 {
+        e.read_i16_bytes(self.0)
+    }
+
+    /// Set the value given a native endian value.
+    pub fn set(&mut self, e: E, n: i16) {
+        self.0 = e.write_i16_bytes(n);
+    }
+}
+
+/// An unaligned `i32` value with an externally specified endianness of type `E`.
+#[derive(Default, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[repr(transparent)]
+pub struct I32Bytes<E: Endian>([u8; 4], PhantomData<E>);
+
+impl<E: Endian> I32Bytes<E> {
+    /// Construct a new value given a native endian value.
+    pub fn new(e: E, n: i32) -> Self {
+        Self(e.write_i32_bytes(n), PhantomData)
+    }
+
+    /// Return the value as a native endian value.
+    pub fn get(self, e: E) -> i32 {
+        e.read_i32_bytes(self.0)
+    }
+
+    /// Set the value given a native endian value.
+    pub fn set(&mut self, e: E, n: i32) {
+        self.0 = e.write_i32_bytes(n);
+    }
+}
+
+/// An unaligned `i64` value with an externally specified endianness of type `E`.
+#[derive(Default, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[repr(transparent)]
+pub struct I64Bytes<E: Endian>([u8; 8], PhantomData<E>);
+
+impl<E: Endian> I64Bytes<E> {
+    /// Construct a new value given a native endian value.
+    pub fn new(e: E, n: i64) -> Self {
+        Self(e.write_i64_bytes(n), PhantomData)
+    }
+
+    /// Return the value as a native endian value.
+    pub fn get(self, e: E) -> i64 {
+        e.read_i64_bytes(self.0)
+    }
+
+    /// Set the value given a native endian value.
+    pub fn set(&mut self, e: E, n: i64) {
+        self.0 = e.write_i64_bytes(n);
+    }
+}
+
+impl<E: Endian> fmt::Debug for U16Bytes<E> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "U16({:x}, {:x})", self.0[0], self.0[1],)
+    }
+}
+
+impl<E: Endian> fmt::Debug for U32Bytes<E> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(
+            f,
+            "U32({:x}, {:x}, {:x}, {:x})",
+            self.0[0], self.0[1], self.0[2], self.0[3],
+        )
+    }
+}
+
+impl<E: Endian> fmt::Debug for U64Bytes<E> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(
+            f,
+            "U64({:x}, {:x}, {:x}, {:x}, {:x}, {:x}, {:x}, {:x})",
+            self.0[0], self.0[1], self.0[2], self.0[3], self.0[4], self.0[5], self.0[6], self.0[7],
+        )
+    }
+}
+
+impl<E: Endian> fmt::Debug for I16Bytes<E> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "I16({:x}, {:x})", self.0[0], self.0[1],)
+    }
+}
+
+impl<E: Endian> fmt::Debug for I32Bytes<E> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(
+            f,
+            "I32({:x}, {:x}, {:x}, {:x})",
+            self.0[0], self.0[1], self.0[2], self.0[3],
+        )
+    }
+}
+
+impl<E: Endian> fmt::Debug for I64Bytes<E> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(
+            f,
+            "I64({:x}, {:x}, {:x}, {:x}, {:x}, {:x}, {:x}, {:x})",
+            self.0[0], self.0[1], self.0[2], self.0[3], self.0[4], self.0[5], self.0[6], self.0[7],
+        )
+    }
+}
+
+unsafe_impl_endian_pod!(U16Bytes, U32Bytes, U64Bytes, I16Bytes, I32Bytes, I64Bytes);
diff --git a/third_party/rust/object/src/lib.rs b/third_party/rust/object/src/lib.rs
new file mode 100644
index 0000000000..40f17c017f
--- /dev/null
+++ b/third_party/rust/object/src/lib.rs
@@ -0,0 +1,117 @@
+//! # `object`
+//!
+//! The `object` crate provides a unified interface to working with object files
+//! across platforms. It supports reading object files and executable files,
+//! and writing object files and some executable files.
+//!
+//! ## Raw struct definitions
+//!
+//! Raw structs are defined for: [ELF](elf), [Mach-O](macho), [PE/COFF](pe), [archive].
+//! Types and traits for zerocopy support are defined in [pod] and [endian].
+//!
+//! ## Unified read API
+//!
+//! The [read::Object] trait defines the unified interace. This trait is implemented
+//! by [read::File], which allows reading any file format, as well as implementations
+//! for each file format: [ELF](read::elf::ElfFile), [Mach-O](read::macho::MachOFile),
+//! [COFF](read::coff::CoffFile), [PE](read::pe::PeFile), [Wasm](read::wasm::WasmFile).
+//!
+//! ## Low level read API
+//!
+//! In addition to the unified read API, the various `read` modules define helpers that
+//! operate on the raw structs. These also provide traits that abstract over the differences
+//! between 32-bit and 64-bit versions of the file format.
+//!
+//! ## Unified write API
+//!
+//! [write::Object] allows building a COFF/ELF/Mach-O object and then writing it out.
+//!
+//! ## Low level executable writers
+//!
+//! [write::elf::Writer] and [write::pe::Writer] allow writing executable files.
+//!
+//! ## Example for unified read API
+//!  ```no_run
+//! # #[cfg(feature = "read")]
+//! use object::{Object, ObjectSection};
+//! use std::error::Error;
+//! use std::fs;
+//!
+//! /// Reads a file and displays the content of the ".boot" section.
+//! fn main() -> Result<(), Box<dyn Error>> {
+//! # #[cfg(all(feature = "read", feature = "std"))] {
+//!   let bin_data = fs::read("./multiboot2-binary.elf")?;
+//!   let obj_file = object::File::parse(&*bin_data)?;
+//!   if let Some(section) = obj_file.section_by_name(".boot") {
+//!     println!("{:#x?}", section.data()?);
+//!   } else {
+//!     eprintln!("section not available");
+//!   }
+//! # }
+//!   Ok(())
+//! }
+//! ```
+
+#![deny(missing_docs)]
+#![deny(missing_debug_implementations)]
+#![no_std]
+// Style.
+#![allow(clippy::collapsible_if)]
+#![allow(clippy::comparison_chain)]
+#![allow(clippy::match_like_matches_macro)]
+#![allow(clippy::single_match)]
+#![allow(clippy::type_complexity)]
+// Occurs due to fallible iteration.
+#![allow(clippy::should_implement_trait)]
+// Unit errors are converted to other types by callers.
+#![allow(clippy::result_unit_err)]
+// Clippy is wrong.
+#![allow(clippy::transmute_ptr_to_ptr)]
+// Worse readability sometimes.
+#![allow(clippy::collapsible_else_if)]
+
+#[cfg(feature = "cargo-all")]
+compile_error!("'--all-features' is not supported; use '--features all' instead");
+
+#[cfg(all(feature = "xcoff", not(feature = "unstable")))]
+compile_error!("'xcoff` is an unstable feature; enable 'unstable' as well");
+
+#[cfg(any(feature = "read_core", feature = "write_core"))]
+#[allow(unused_imports)]
+#[macro_use]
+extern crate alloc;
+
+#[cfg(feature = "std")]
+#[allow(unused_imports)]
+#[macro_use]
+extern crate std;
+
+mod common;
+pub use common::*;
+
+#[macro_use]
+pub mod endian;
+pub use endian::*;
+
+#[macro_use]
+pub mod pod;
+pub use pod::*;
+
+#[cfg(feature = "read_core")]
+pub mod read;
+#[cfg(feature = "read_core")]
+pub use read::*;
+
+#[cfg(feature = "write_core")]
+pub mod write;
+
+#[cfg(feature = "archive")]
+pub mod archive;
+#[cfg(feature = "elf")]
+pub mod elf;
+#[cfg(feature = "macho")]
+pub mod macho;
+#[cfg(any(feature = "coff", feature = "pe"))]
+pub mod pe;
+#[cfg(feature = "xcoff")]
+pub mod xcoff;
diff --git a/third_party/rust/object/src/macho.rs b/third_party/rust/object/src/macho.rs
new file mode 100644
index 0000000000..86a5bf6266
--- /dev/null
+++ b/third_party/rust/object/src/macho.rs
@@ -0,0 +1,3307 @@
+//! Mach-O definitions.
+//!
+//! These definitions are independent of read/write support, although we do implement
+//! some traits useful for those.
+//!
+//! This module is based heavily on header files from MacOSX11.1.sdk.
+
+#![allow(missing_docs)]
+
+use crate::endian::{BigEndian, Endian, U64Bytes, U16, U32, U64};
+use crate::pod::Pod;
+
+// Definitions from "/usr/include/mach/machine.h".
+
+/*
+ * Capability bits used in the definition of cpu_type.
+ */
+
+/// mask for architecture bits
+pub const CPU_ARCH_MASK: u32 = 0xff00_0000;
+/// 64 bit ABI
+pub const CPU_ARCH_ABI64: u32 = 0x0100_0000;
+/// ABI for 64-bit hardware with 32-bit types; LP32
+pub const CPU_ARCH_ABI64_32: u32 = 0x0200_0000;
+
+/*
+ *	Machine types known by all.
+ */
+
+pub const CPU_TYPE_ANY: u32 = !0;
+
+pub const CPU_TYPE_VAX: u32 = 1;
+pub const CPU_TYPE_MC680X0: u32 = 6;
+pub const CPU_TYPE_X86: u32 = 7;
+pub const CPU_TYPE_X86_64: u32 = CPU_TYPE_X86 | CPU_ARCH_ABI64;
+pub const CPU_TYPE_MIPS: u32 = 8;
+pub const CPU_TYPE_MC98000: u32 = 10;
+pub const CPU_TYPE_HPPA: u32 = 11;
+pub const CPU_TYPE_ARM: u32 = 12;
+pub const CPU_TYPE_ARM64: u32 = CPU_TYPE_ARM | CPU_ARCH_ABI64;
+pub const CPU_TYPE_ARM64_32: u32 = CPU_TYPE_ARM | CPU_ARCH_ABI64_32;
+pub const CPU_TYPE_MC88000: u32 = 13;
+pub const CPU_TYPE_SPARC: u32 = 14;
+pub const CPU_TYPE_I860: u32 = 15;
+pub const CPU_TYPE_ALPHA: u32 = 16;
+pub const CPU_TYPE_POWERPC: u32 = 18;
+pub const CPU_TYPE_POWERPC64: u32 = CPU_TYPE_POWERPC | CPU_ARCH_ABI64;
+
+/*
+ * Capability bits used in the definition of cpu_subtype.
+ */
+/// mask for feature flags
+pub const CPU_SUBTYPE_MASK: u32 = 0xff00_0000;
+/// 64 bit libraries
+pub const CPU_SUBTYPE_LIB64: u32 = 0x8000_0000;
+/// pointer authentication with versioned ABI
+pub const CPU_SUBTYPE_PTRAUTH_ABI: u32 = 0x8000_0000;
+
+/// When selecting a slice, ANY will pick the slice with the best
+/// grading for the selected cpu_type_t, unlike the "ALL" subtypes,
+/// which are the slices that can run on any hardware for that cpu type.
+pub const CPU_SUBTYPE_ANY: u32 = !0;
+
+/*
+ *	Object files that are hand-crafted to run on any
+ *	implementation of an architecture are tagged with
+ *	CPU_SUBTYPE_MULTIPLE.  This functions essentially the same as
+ *	the "ALL" subtype of an architecture except that it allows us
+ *	to easily find object files that may need to be modified
+ *	whenever a new implementation of an architecture comes out.
+ *
+ *	It is the responsibility of the implementor to make sure the
+ *	software handles unsupported implementations elegantly.
+ */
+pub const CPU_SUBTYPE_MULTIPLE: u32 = !0;
+pub const CPU_SUBTYPE_LITTLE_ENDIAN: u32 = 0;
+pub const CPU_SUBTYPE_BIG_ENDIAN: u32 = 1;
+
+/*
+ *	VAX subtypes (these do *not* necessary conform to the actual cpu
+ *	ID assigned by DEC available via the SID register).
+ */
+
+pub const CPU_SUBTYPE_VAX_ALL: u32 = 0;
+pub const CPU_SUBTYPE_VAX780: u32 = 1;
+pub const CPU_SUBTYPE_VAX785: u32 = 2;
+pub const CPU_SUBTYPE_VAX750: u32 = 3;
+pub const CPU_SUBTYPE_VAX730: u32 = 4;
+pub const CPU_SUBTYPE_UVAXI: u32 = 5;
+pub const CPU_SUBTYPE_UVAXII: u32 = 6;
+pub const CPU_SUBTYPE_VAX8200: u32 = 7;
+pub const CPU_SUBTYPE_VAX8500: u32 = 8;
+pub const CPU_SUBTYPE_VAX8600: u32 = 9;
+pub const CPU_SUBTYPE_VAX8650: u32 = 10;
+pub const CPU_SUBTYPE_VAX8800: u32 = 11;
+pub const CPU_SUBTYPE_UVAXIII: u32 = 12;
+
+/*
+ *      680x0 subtypes
+ *
+ * The subtype definitions here are unusual for historical reasons.
+ * NeXT used to consider 68030 code as generic 68000 code.  For
+ * backwards compatability:
+ *
+ *	CPU_SUBTYPE_MC68030 symbol has been preserved for source code
+ *	compatability.
+ *
+ *	CPU_SUBTYPE_MC680x0_ALL has been defined to be the same
+ *	subtype as CPU_SUBTYPE_MC68030 for binary comatability.
+ *
+ *	CPU_SUBTYPE_MC68030_ONLY has been added to allow new object
+ *	files to be tagged as containing 68030-specific instructions.
+ */
+
+pub const CPU_SUBTYPE_MC680X0_ALL: u32 = 1;
+// compat
+pub const CPU_SUBTYPE_MC68030: u32 = 1;
+pub const CPU_SUBTYPE_MC68040: u32 = 2;
+pub const CPU_SUBTYPE_MC68030_ONLY: u32 = 3;
+
+/*
+ *	I386 subtypes
+ */
+
+#[inline]
+pub const fn cpu_subtype_intel(f: u32, m: u32) -> u32 {
+    f + (m << 4)
+}
+
+pub const CPU_SUBTYPE_I386_ALL: u32 = cpu_subtype_intel(3, 0);
+pub const CPU_SUBTYPE_386: u32 = cpu_subtype_intel(3, 0);
+pub const CPU_SUBTYPE_486: u32 = cpu_subtype_intel(4, 0);
+pub const CPU_SUBTYPE_486SX: u32 = cpu_subtype_intel(4, 8);
+pub const CPU_SUBTYPE_586: u32 = cpu_subtype_intel(5, 0);
+pub const CPU_SUBTYPE_PENT: u32 = cpu_subtype_intel(5, 0);
+pub const CPU_SUBTYPE_PENTPRO: u32 = cpu_subtype_intel(6, 1);
+pub const CPU_SUBTYPE_PENTII_M3: u32 = cpu_subtype_intel(6, 3);
+pub const CPU_SUBTYPE_PENTII_M5: u32 = cpu_subtype_intel(6, 5);
+pub const CPU_SUBTYPE_CELERON: u32 = cpu_subtype_intel(7, 6);
+pub const CPU_SUBTYPE_CELERON_MOBILE: u32 = cpu_subtype_intel(7, 7);
+pub const CPU_SUBTYPE_PENTIUM_3: u32 = cpu_subtype_intel(8, 0);
+pub const CPU_SUBTYPE_PENTIUM_3_M: u32 = cpu_subtype_intel(8, 1);
+pub const CPU_SUBTYPE_PENTIUM_3_XEON: u32 = cpu_subtype_intel(8, 2);
+pub const CPU_SUBTYPE_PENTIUM_M: u32 = cpu_subtype_intel(9, 0);
+pub const CPU_SUBTYPE_PENTIUM_4: u32 = cpu_subtype_intel(10, 0);
+pub const CPU_SUBTYPE_PENTIUM_4_M: u32 = cpu_subtype_intel(10, 1);
+pub const CPU_SUBTYPE_ITANIUM: u32 = cpu_subtype_intel(11, 0);
+pub const CPU_SUBTYPE_ITANIUM_2: u32 = cpu_subtype_intel(11, 1);
+pub const CPU_SUBTYPE_XEON: u32 = cpu_subtype_intel(12, 0);
+pub const CPU_SUBTYPE_XEON_MP: u32 = cpu_subtype_intel(12, 1);
+
+#[inline]
+pub const fn cpu_subtype_intel_family(x: u32) -> u32 {
+    x & 15
+}
+pub const CPU_SUBTYPE_INTEL_FAMILY_MAX: u32 = 15;
+
+#[inline]
+pub const fn cpu_subtype_intel_model(x: u32) -> u32 {
+    x >> 4
+}
+pub const CPU_SUBTYPE_INTEL_MODEL_ALL: u32 = 0;
+
+/*
+ *	X86 subtypes.
+ */
+
+pub const CPU_SUBTYPE_X86_ALL: u32 = 3;
+pub const CPU_SUBTYPE_X86_64_ALL: u32 = 3;
+pub const CPU_SUBTYPE_X86_ARCH1: u32 = 4;
+/// Haswell feature subset
+pub const CPU_SUBTYPE_X86_64_H: u32 = 8;
+
+/*
+ *	Mips subtypes.
+ */
+
+pub const CPU_SUBTYPE_MIPS_ALL: u32 = 0;
+pub const CPU_SUBTYPE_MIPS_R2300: u32 = 1;
+pub const CPU_SUBTYPE_MIPS_R2600: u32 = 2;
+pub const CPU_SUBTYPE_MIPS_R2800: u32 = 3;
+/// pmax
+pub const CPU_SUBTYPE_MIPS_R2000A: u32 = 4;
+pub const CPU_SUBTYPE_MIPS_R2000: u32 = 5;
+/// 3max
+pub const CPU_SUBTYPE_MIPS_R3000A: u32 = 6;
+pub const CPU_SUBTYPE_MIPS_R3000: u32 = 7;
+
+/*
+ *	MC98000 (PowerPC) subtypes
+ */
+pub const CPU_SUBTYPE_MC98000_ALL: u32 = 0;
+pub const CPU_SUBTYPE_MC98601: u32 = 1;
+
+/*
+ *	HPPA subtypes for Hewlett-Packard HP-PA family of
+ *	risc processors. Port by NeXT to 700 series.
+ */
+
+pub const CPU_SUBTYPE_HPPA_ALL: u32 = 0;
+pub const CPU_SUBTYPE_HPPA_7100LC: u32 = 1;
+
+/*
+ *	MC88000 subtypes.
+ */
+pub const CPU_SUBTYPE_MC88000_ALL: u32 = 0;
+pub const CPU_SUBTYPE_MC88100: u32 = 1;
+pub const CPU_SUBTYPE_MC88110: u32 = 2;
+
+/*
+ *	SPARC subtypes
+ */
+pub const CPU_SUBTYPE_SPARC_ALL: u32 = 0;
+
+/*
+ *	I860 subtypes
+ */
+pub const CPU_SUBTYPE_I860_ALL: u32 = 0;
+pub const CPU_SUBTYPE_I860_860: u32 = 1;
+
+/*
+ *	PowerPC subtypes
+ */
+pub const CPU_SUBTYPE_POWERPC_ALL: u32 = 0;
+pub const CPU_SUBTYPE_POWERPC_601: u32 = 1;
+pub const CPU_SUBTYPE_POWERPC_602: u32 = 2;
+pub const CPU_SUBTYPE_POWERPC_603: u32 = 3;
+pub const CPU_SUBTYPE_POWERPC_603E: u32 = 4;
+pub const CPU_SUBTYPE_POWERPC_603EV: u32 = 5;
+pub const CPU_SUBTYPE_POWERPC_604: u32 = 6;
+pub const CPU_SUBTYPE_POWERPC_604E: u32 = 7;
+pub const CPU_SUBTYPE_POWERPC_620: u32 = 8;
+pub const CPU_SUBTYPE_POWERPC_750: u32 = 9;
+pub const CPU_SUBTYPE_POWERPC_7400: u32 = 10;
+pub const CPU_SUBTYPE_POWERPC_7450: u32 = 11;
+pub const CPU_SUBTYPE_POWERPC_970: u32 = 100;
+
+/*
+ *	ARM subtypes
+ */
+pub const CPU_SUBTYPE_ARM_ALL: u32 = 0;
+pub const CPU_SUBTYPE_ARM_V4T: u32 = 5;
+pub const CPU_SUBTYPE_ARM_V6: u32 = 6;
+pub const CPU_SUBTYPE_ARM_V5TEJ: u32 = 7;
+pub const CPU_SUBTYPE_ARM_XSCALE: u32 = 8;
+/// ARMv7-A and ARMv7-R
+pub const CPU_SUBTYPE_ARM_V7: u32 = 9;
+/// Cortex A9
+pub const CPU_SUBTYPE_ARM_V7F: u32 = 10;
+/// Swift
+pub const CPU_SUBTYPE_ARM_V7S: u32 = 11;
+pub const CPU_SUBTYPE_ARM_V7K: u32 = 12;
+pub const CPU_SUBTYPE_ARM_V8: u32 = 13;
+/// Not meant to be run under xnu
+pub const CPU_SUBTYPE_ARM_V6M: u32 = 14;
+/// Not meant to be run under xnu
+pub const CPU_SUBTYPE_ARM_V7M: u32 = 15;
+/// Not meant to be run under xnu
+pub const CPU_SUBTYPE_ARM_V7EM: u32 = 16;
+/// Not meant to be run under xnu
+pub const CPU_SUBTYPE_ARM_V8M: u32 = 17;
+
+/*
+ *  ARM64 subtypes
+ */
+pub const CPU_SUBTYPE_ARM64_ALL: u32 = 0;
+pub const CPU_SUBTYPE_ARM64_V8: u32 = 1;
+pub const CPU_SUBTYPE_ARM64E: u32 = 2;
+
+/*
+ *  ARM64_32 subtypes
+ */
+pub const CPU_SUBTYPE_ARM64_32_ALL: u32 = 0;
+pub const CPU_SUBTYPE_ARM64_32_V8: u32 = 1;
+
+// Definitions from "/usr/include/mach/vm_prot.h".
+
+/// read permission
+pub const VM_PROT_READ: u32 = 0x01;
+/// write permission
+pub const VM_PROT_WRITE: u32 = 0x02;
+/// execute permission
+pub const VM_PROT_EXECUTE: u32 = 0x04;
+
+// Definitions from https://opensource.apple.com/source/dyld/dyld-210.2.3/launch-cache/dyld_cache_format.h.auto.html
+
+/// The dyld cache header.
+/// Corresponds to struct dyld_cache_header from dyld_cache_format.h.
+/// This header has grown over time. Only the fields up to and including dyld_base_address
+/// are guaranteed to be present. For all other fields, check the header size before
+/// accessing the field. The header size is stored in mapping_offset; the mappings start
+/// right after the theader.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct DyldCacheHeader<E: Endian> {
+    /// e.g. "dyld_v0    i386"
+    pub magic: [u8; 16],
+    /// file offset to first dyld_cache_mapping_info
+    pub mapping_offset: U32<E>, // offset: 0x10
+    /// number of dyld_cache_mapping_info entries
+    pub mapping_count: U32<E>, // offset: 0x14
+    /// file offset to first dyld_cache_image_info
+    pub images_offset: U32<E>, // offset: 0x18
+    /// number of dyld_cache_image_info entries
+    pub images_count: U32<E>, // offset: 0x1c
+    /// base address of dyld when cache was built
+    pub dyld_base_address: U64<E>, // offset: 0x20
+    ///
+    reserved1: [u8; 32], // offset: 0x28
+    /// file offset of where local symbols are stored
+    pub local_symbols_offset: U64<E>, // offset: 0x48
+    /// size of local symbols information
+    pub local_symbols_size: U64<E>, // offset: 0x50
+    /// unique value for each shared cache file
+    pub uuid: [u8; 16], // offset: 0x58
+    ///
+    reserved2: [u8; 32], // offset: 0x68
+    ///
+    reserved3: [u8; 32], // offset: 0x88
+    ///
+    reserved4: [u8; 32], // offset: 0xa8
+    ///
+    reserved5: [u8; 32], // offset: 0xc8
+    ///
+    reserved6: [u8; 32], // offset: 0xe8
+    ///
+    reserved7: [u8; 32], // offset: 0x108
+    ///
+    reserved8: [u8; 32], // offset: 0x128
+    ///
+    reserved9: [u8; 32], // offset: 0x148
+    ///
+    reserved10: [u8; 32], // offset: 0x168
+    /// file offset to first dyld_subcache_info
+    pub subcaches_offset: U32<E>, // offset: 0x188
+    /// number of dyld_subcache_info entries
+    pub subcaches_count: U32<E>, // offset: 0x18c
+    /// the UUID of the .symbols subcache
+    pub symbols_subcache_uuid: [u8; 16], // offset: 0x190
+    ///
+    reserved11: [u8; 32], // offset: 0x1a0
+    /// file offset to first dyld_cache_image_info
+    /// Use this  instead of images_offset if mapping_offset is at least 0x1c4.
+    pub images_across_all_subcaches_offset: U32<E>, // offset: 0x1c0
+    /// number of dyld_cache_image_info entries
+    /// Use this  instead of images_count if mapping_offset is at least 0x1c4.
+    pub images_across_all_subcaches_count: U32<E>, // offset: 0x1c4
+}
+
+/// Corresponds to struct dyld_cache_mapping_info from dyld_cache_format.h.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct DyldCacheMappingInfo<E: Endian> {
+    ///
+    pub address: U64<E>,
+    ///
+    pub size: U64<E>,
+    ///
+    pub file_offset: U64<E>,
+    ///
+    pub max_prot: U32<E>,
+    ///
+    pub init_prot: U32<E>,
+}
+
+/// Corresponds to struct dyld_cache_image_info from dyld_cache_format.h.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct DyldCacheImageInfo<E: Endian> {
+    ///
+    pub address: U64<E>,
+    ///
+    pub mod_time: U64<E>,
+    ///
+    pub inode: U64<E>,
+    ///
+    pub path_file_offset: U32<E>,
+    ///
+    pub pad: U32<E>,
+}
+
+/// Corresponds to a struct whose source code has not been published as of Nov 2021.
+/// Added in the dyld cache version which shipped with macOS 12 / iOS 15.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct DyldSubCacheInfo<E: Endian> {
+    /// The UUID of this subcache.
+    pub uuid: [u8; 16],
+    /// The size of this subcache plus all previous subcaches.
+    pub cumulative_size: U64<E>,
+}
+
+// Definitions from "/usr/include/mach-o/loader.h".
+
+/*
+ * This header file describes the structures of the file format for "fat"
+ * architecture specific file (wrapper design).  At the begining of the file
+ * there is one `FatHeader` structure followed by a number of `FatArch*`
+ * structures.  For each architecture in the file, specified by a pair of
+ * cputype and cpusubtype, the `FatHeader` describes the file offset, file
+ * size and alignment in the file of the architecture specific member.
+ * The padded bytes in the file to place each member on it's specific alignment
+ * are defined to be read as zeros and can be left as "holes" if the file system
+ * can support them as long as they read as zeros.
+ *
+ * All structures defined here are always written and read to/from disk
+ * in big-endian order.
+ */
+
+pub const FAT_MAGIC: u32 = 0xcafe_babe;
+/// NXSwapLong(FAT_MAGIC)
+pub const FAT_CIGAM: u32 = 0xbeba_feca;
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct FatHeader {
+    /// FAT_MAGIC or FAT_MAGIC_64
+    pub magic: U32<BigEndian>,
+    /// number of structs that follow
+    pub nfat_arch: U32<BigEndian>,
+}
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct FatArch32 {
+    /// cpu specifier (int)
+    pub cputype: U32<BigEndian>,
+    /// machine specifier (int)
+    pub cpusubtype: U32<BigEndian>,
+    /// file offset to this object file
+    pub offset: U32<BigEndian>,
+    /// size of this object file
+    pub size: U32<BigEndian>,
+    /// alignment as a power of 2
+    pub align: U32<BigEndian>,
+}
+
+/*
+ * The support for the 64-bit fat file format described here is a work in
+ * progress and not yet fully supported in all the Apple Developer Tools.
+ *
+ * When a slice is greater than 4mb or an offset to a slice is greater than 4mb
+ * then the 64-bit fat file format is used.
+ */
+pub const FAT_MAGIC_64: u32 = 0xcafe_babf;
+/// NXSwapLong(FAT_MAGIC_64)
+pub const FAT_CIGAM_64: u32 = 0xbfba_feca;
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct FatArch64 {
+    /// cpu specifier (int)
+    pub cputype: U32<BigEndian>,
+    /// machine specifier (int)
+    pub cpusubtype: U32<BigEndian>,
+    /// file offset to this object file
+    pub offset: U64<BigEndian>,
+    /// size of this object file
+    pub size: U64<BigEndian>,
+    /// alignment as a power of 2
+    pub align: U32<BigEndian>,
+    /// reserved
+    pub reserved: U32<BigEndian>,
+}
+
+// Definitions from "/usr/include/mach-o/loader.h".
+
+/// The 32-bit mach header.
+///
+/// Appears at the very beginning of the object file for 32-bit architectures.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct MachHeader32<E: Endian> {
+    /// mach magic number identifier
+    pub magic: U32<BigEndian>,
+    /// cpu specifier
+    pub cputype: U32<E>,
+    /// machine specifier
+    pub cpusubtype: U32<E>,
+    /// type of file
+    pub filetype: U32<E>,
+    /// number of load commands
+    pub ncmds: U32<E>,
+    /// the size of all the load commands
+    pub sizeofcmds: U32<E>,
+    /// flags
+    pub flags: U32<E>,
+}
+
+// Values for `MachHeader32::magic`.
+/// the mach magic number
+pub const MH_MAGIC: u32 = 0xfeed_face;
+/// NXSwapInt(MH_MAGIC)
+pub const MH_CIGAM: u32 = 0xcefa_edfe;
+
+/// The 64-bit mach header.
+///
+/// Appears at the very beginning of object files for 64-bit architectures.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct MachHeader64<E: Endian> {
+    /// mach magic number identifier
+    pub magic: U32<BigEndian>,
+    /// cpu specifier
+    pub cputype: U32<E>,
+    /// machine specifier
+    pub cpusubtype: U32<E>,
+    /// type of file
+    pub filetype: U32<E>,
+    /// number of load commands
+    pub ncmds: U32<E>,
+    /// the size of all the load commands
+    pub sizeofcmds: U32<E>,
+    /// flags
+    pub flags: U32<E>,
+    /// reserved
+    pub reserved: U32<E>,
+}
+
+// Values for `MachHeader64::magic`.
+/// the 64-bit mach magic number
+pub const MH_MAGIC_64: u32 = 0xfeed_facf;
+/// NXSwapInt(MH_MAGIC_64)
+pub const MH_CIGAM_64: u32 = 0xcffa_edfe;
+
+/*
+ * The layout of the file depends on the filetype.  For all but the MH_OBJECT
+ * file type the segments are padded out and aligned on a segment alignment
+ * boundary for efficient demand pageing.  The MH_EXECUTE, MH_FVMLIB, MH_DYLIB,
+ * MH_DYLINKER and MH_BUNDLE file types also have the headers included as part
+ * of their first segment.
+ *
+ * The file type MH_OBJECT is a compact format intended as output of the
+ * assembler and input (and possibly output) of the link editor (the .o
+ * format).  All sections are in one unnamed segment with no segment padding.
+ * This format is used as an executable format when the file is so small the
+ * segment padding greatly increases its size.
+ *
+ * The file type MH_PRELOAD is an executable format intended for things that
+ * are not executed under the kernel (proms, stand alones, kernels, etc).  The
+ * format can be executed under the kernel but may demand paged it and not
+ * preload it before execution.
+ *
+ * A core file is in MH_CORE format and can be any in an arbritray legal
+ * Mach-O file.
+ */
+
+// Values for `MachHeader*::filetype`.
+/// relocatable object file
+pub const MH_OBJECT: u32 = 0x1;
+/// demand paged executable file
+pub const MH_EXECUTE: u32 = 0x2;
+/// fixed VM shared library file
+pub const MH_FVMLIB: u32 = 0x3;
+/// core file
+pub const MH_CORE: u32 = 0x4;
+/// preloaded executable file
+pub const MH_PRELOAD: u32 = 0x5;
+/// dynamically bound shared library
+pub const MH_DYLIB: u32 = 0x6;
+/// dynamic link editor
+pub const MH_DYLINKER: u32 = 0x7;
+/// dynamically bound bundle file
+pub const MH_BUNDLE: u32 = 0x8;
+/// shared library stub for static linking only, no section contents
+pub const MH_DYLIB_STUB: u32 = 0x9;
+/// companion file with only debug sections
+pub const MH_DSYM: u32 = 0xa;
+/// x86_64 kexts
+pub const MH_KEXT_BUNDLE: u32 = 0xb;
+/// set of mach-o's
+pub const MH_FILESET: u32 = 0xc;
+
+// Values for `MachHeader*::flags`.
+/// the object file has no undefined references
+pub const MH_NOUNDEFS: u32 = 0x1;
+/// the object file is the output of an incremental link against a base file and can't be link edited again
+pub const MH_INCRLINK: u32 = 0x2;
+/// the object file is input for the dynamic linker and can't be staticly link edited again
+pub const MH_DYLDLINK: u32 = 0x4;
+/// the object file's undefined references are bound by the dynamic linker when loaded.
+pub const MH_BINDATLOAD: u32 = 0x8;
+/// the file has its dynamic undefined references prebound.
+pub const MH_PREBOUND: u32 = 0x10;
+/// the file has its read-only and read-write segments split
+pub const MH_SPLIT_SEGS: u32 = 0x20;
+/// the shared library init routine is to be run lazily via catching memory faults to its writeable segments (obsolete)
+pub const MH_LAZY_INIT: u32 = 0x40;
+/// the image is using two-level name space bindings
+pub const MH_TWOLEVEL: u32 = 0x80;
+/// the executable is forcing all images to use flat name space bindings
+pub const MH_FORCE_FLAT: u32 = 0x100;
+/// this umbrella guarantees no multiple defintions of symbols in its sub-images so the two-level namespace hints can always be used.
+pub const MH_NOMULTIDEFS: u32 = 0x200;
+/// do not have dyld notify the prebinding agent about this executable
+pub const MH_NOFIXPREBINDING: u32 = 0x400;
+/// the binary is not prebound but can have its prebinding redone. only used when MH_PREBOUND is not set.
+pub const MH_PREBINDABLE: u32 = 0x800;
+/// indicates that this binary binds to all two-level namespace modules of its dependent libraries. only used when MH_PREBINDABLE and MH_TWOLEVEL are both set.
+pub const MH_ALLMODSBOUND: u32 = 0x1000;
+/// safe to divide up the sections into sub-sections via symbols for dead code stripping
+pub const MH_SUBSECTIONS_VIA_SYMBOLS: u32 = 0x2000;
+/// the binary has been canonicalized via the unprebind operation
+pub const MH_CANONICAL: u32 = 0x4000;
+/// the final linked image contains external weak symbols
+pub const MH_WEAK_DEFINES: u32 = 0x8000;
+/// the final linked image uses weak symbols
+pub const MH_BINDS_TO_WEAK: u32 = 0x10000;
+/// When this bit is set, all stacks in the task will be given stack execution privilege.  Only used in MH_EXECUTE filetypes.
+pub const MH_ALLOW_STACK_EXECUTION: u32 = 0x20000;
+/// When this bit is set, the binary declares it is safe for use in processes with uid zero
+pub const MH_ROOT_SAFE: u32 = 0x40000;
+/// When this bit is set, the binary declares it is safe for use in processes when issetugid() is true
+pub const MH_SETUID_SAFE: u32 = 0x80000;
+/// When this bit is set on a dylib, the static linker does not need to examine dependent dylibs to see if any are re-exported
+pub const MH_NO_REEXPORTED_DYLIBS: u32 = 0x10_0000;
+/// When this bit is set, the OS will load the main executable at a random address.  Only used in MH_EXECUTE filetypes.
+pub const MH_PIE: u32 = 0x20_0000;
+/// Only for use on dylibs.  When linking against a dylib that has this bit set, the static linker will automatically not create a LC_LOAD_DYLIB load command to the dylib if no symbols are being referenced from the dylib.
+pub const MH_DEAD_STRIPPABLE_DYLIB: u32 = 0x40_0000;
+/// Contains a section of type S_THREAD_LOCAL_VARIABLES
+pub const MH_HAS_TLV_DESCRIPTORS: u32 = 0x80_0000;
+/// When this bit is set, the OS will run the main executable with a non-executable heap even on platforms (e.g. i386) that don't require it. Only used in MH_EXECUTE filetypes.
+pub const MH_NO_HEAP_EXECUTION: u32 = 0x100_0000;
+/// The code was linked for use in an application extension.
+pub const MH_APP_EXTENSION_SAFE: u32 = 0x0200_0000;
+/// The external symbols listed in the nlist symbol table do not include all the symbols listed in the dyld info.
+pub const MH_NLIST_OUTOFSYNC_WITH_DYLDINFO: u32 = 0x0400_0000;
+/// Allow LC_MIN_VERSION_MACOS and LC_BUILD_VERSION load commands with
+/// the platforms macOS, iOSMac, iOSSimulator, tvOSSimulator and watchOSSimulator.
+pub const MH_SIM_SUPPORT: u32 = 0x0800_0000;
+/// Only for use on dylibs. When this bit is set, the dylib is part of the dyld
+/// shared cache, rather than loose in the filesystem.
+pub const MH_DYLIB_IN_CACHE: u32 = 0x8000_0000;
+
+/// Common fields at the start of every load command.
+///
+/// The load commands directly follow the mach_header.  The total size of all
+/// of the commands is given by the sizeofcmds field in the mach_header.  All
+/// load commands must have as their first two fields `cmd` and `cmdsize`.  The `cmd`
+/// field is filled in with a constant for that command type.  Each command type
+/// has a structure specifically for it.  The `cmdsize` field is the size in bytes
+/// of the particular load command structure plus anything that follows it that
+/// is a part of the load command (i.e. section structures, strings, etc.).  To
+/// advance to the next load command the `cmdsize` can be added to the offset or
+/// pointer of the current load command.  The `cmdsize` for 32-bit architectures
+/// MUST be a multiple of 4 bytes and for 64-bit architectures MUST be a multiple
+/// of 8 bytes (these are forever the maximum alignment of any load commands).
+/// The padded bytes must be zero.  All tables in the object file must also
+/// follow these rules so the file can be memory mapped.  Otherwise the pointers
+/// to these tables will not work well or at all on some machines.  With all
+/// padding zeroed like objects will compare byte for byte.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct LoadCommand<E: Endian> {
+    /// Type of load command.
+    ///
+    /// One of the `LC_*` constants.
+    pub cmd: U32<E>,
+    /// Total size of command in bytes.
+    pub cmdsize: U32<E>,
+}
+
+/*
+ * After MacOS X 10.1 when a new load command is added that is required to be
+ * understood by the dynamic linker for the image to execute properly the
+ * LC_REQ_DYLD bit will be or'ed into the load command constant.  If the dynamic
+ * linker sees such a load command it it does not understand will issue a
+ * "unknown load command required for execution" error and refuse to use the
+ * image.  Other load commands without this bit that are not understood will
+ * simply be ignored.
+ */
+pub const LC_REQ_DYLD: u32 = 0x8000_0000;
+
+/* Constants for the cmd field of all load commands, the type */
+/// segment of this file to be mapped
+pub const LC_SEGMENT: u32 = 0x1;
+/// link-edit stab symbol table info
+pub const LC_SYMTAB: u32 = 0x2;
+/// link-edit gdb symbol table info (obsolete)
+pub const LC_SYMSEG: u32 = 0x3;
+/// thread
+pub const LC_THREAD: u32 = 0x4;
+/// unix thread (includes a stack)
+pub const LC_UNIXTHREAD: u32 = 0x5;
+/// load a specified fixed VM shared library
+pub const LC_LOADFVMLIB: u32 = 0x6;
+/// fixed VM shared library identification
+pub const LC_IDFVMLIB: u32 = 0x7;
+/// object identification info (obsolete)
+pub const LC_IDENT: u32 = 0x8;
+/// fixed VM file inclusion (internal use)
+pub const LC_FVMFILE: u32 = 0x9;
+/// prepage command (internal use)
+pub const LC_PREPAGE: u32 = 0xa;
+/// dynamic link-edit symbol table info
+pub const LC_DYSYMTAB: u32 = 0xb;
+/// load a dynamically linked shared library
+pub const LC_LOAD_DYLIB: u32 = 0xc;
+/// dynamically linked shared lib ident
+pub const LC_ID_DYLIB: u32 = 0xd;
+/// load a dynamic linker
+pub const LC_LOAD_DYLINKER: u32 = 0xe;
+/// dynamic linker identification
+pub const LC_ID_DYLINKER: u32 = 0xf;
+/// modules prebound for a dynamically linked shared library
+pub const LC_PREBOUND_DYLIB: u32 = 0x10;
+/// image routines
+pub const LC_ROUTINES: u32 = 0x11;
+/// sub framework
+pub const LC_SUB_FRAMEWORK: u32 = 0x12;
+/// sub umbrella
+pub const LC_SUB_UMBRELLA: u32 = 0x13;
+/// sub client
+pub const LC_SUB_CLIENT: u32 = 0x14;
+/// sub library
+pub const LC_SUB_LIBRARY: u32 = 0x15;
+/// two-level namespace lookup hints
+pub const LC_TWOLEVEL_HINTS: u32 = 0x16;
+/// prebind checksum
+pub const LC_PREBIND_CKSUM: u32 = 0x17;
+/// load a dynamically linked shared library that is allowed to be missing
+/// (all symbols are weak imported).
+pub const LC_LOAD_WEAK_DYLIB: u32 = 0x18 | LC_REQ_DYLD;
+/// 64-bit segment of this file to be mapped
+pub const LC_SEGMENT_64: u32 = 0x19;
+/// 64-bit image routines
+pub const LC_ROUTINES_64: u32 = 0x1a;
+/// the uuid
+pub const LC_UUID: u32 = 0x1b;
+/// runpath additions
+pub const LC_RPATH: u32 = 0x1c | LC_REQ_DYLD;
+/// local of code signature
+pub const LC_CODE_SIGNATURE: u32 = 0x1d;
+/// local of info to split segments
+pub const LC_SEGMENT_SPLIT_INFO: u32 = 0x1e;
+/// load and re-export dylib
+pub const LC_REEXPORT_DYLIB: u32 = 0x1f | LC_REQ_DYLD;
+/// delay load of dylib until first use
+pub const LC_LAZY_LOAD_DYLIB: u32 = 0x20;
+/// encrypted segment information
+pub const LC_ENCRYPTION_INFO: u32 = 0x21;
+/// compressed dyld information
+pub const LC_DYLD_INFO: u32 = 0x22;
+/// compressed dyld information only
+pub const LC_DYLD_INFO_ONLY: u32 = 0x22 | LC_REQ_DYLD;
+/// load upward dylib
+pub const LC_LOAD_UPWARD_DYLIB: u32 = 0x23 | LC_REQ_DYLD;
+/// build for MacOSX min OS version
+pub const LC_VERSION_MIN_MACOSX: u32 = 0x24;
+/// build for iPhoneOS min OS version
+pub const LC_VERSION_MIN_IPHONEOS: u32 = 0x25;
+/// compressed table of function start addresses
+pub const LC_FUNCTION_STARTS: u32 = 0x26;
+/// string for dyld to treat like environment variable
+pub const LC_DYLD_ENVIRONMENT: u32 = 0x27;
+/// replacement for LC_UNIXTHREAD
+pub const LC_MAIN: u32 = 0x28 | LC_REQ_DYLD;
+/// table of non-instructions in __text
+pub const LC_DATA_IN_CODE: u32 = 0x29;
+/// source version used to build binary
+pub const LC_SOURCE_VERSION: u32 = 0x2A;
+/// Code signing DRs copied from linked dylibs
+pub const LC_DYLIB_CODE_SIGN_DRS: u32 = 0x2B;
+/// 64-bit encrypted segment information
+pub const LC_ENCRYPTION_INFO_64: u32 = 0x2C;
+/// linker options in MH_OBJECT files
+pub const LC_LINKER_OPTION: u32 = 0x2D;
+/// optimization hints in MH_OBJECT files
+pub const LC_LINKER_OPTIMIZATION_HINT: u32 = 0x2E;
+/// build for AppleTV min OS version
+pub const LC_VERSION_MIN_TVOS: u32 = 0x2F;
+/// build for Watch min OS version
+pub const LC_VERSION_MIN_WATCHOS: u32 = 0x30;
+/// arbitrary data included within a Mach-O file
+pub const LC_NOTE: u32 = 0x31;
+/// build for platform min OS version
+pub const LC_BUILD_VERSION: u32 = 0x32;
+/// used with `LinkeditDataCommand`, payload is trie
+pub const LC_DYLD_EXPORTS_TRIE: u32 = 0x33 | LC_REQ_DYLD;
+/// used with `LinkeditDataCommand`
+pub const LC_DYLD_CHAINED_FIXUPS: u32 = 0x34 | LC_REQ_DYLD;
+/// used with `FilesetEntryCommand`
+pub const LC_FILESET_ENTRY: u32 = 0x35 | LC_REQ_DYLD;
+
+/// A variable length string in a load command.
+///
+/// The strings are stored just after the load command structure and
+/// the offset is from the start of the load command structure.  The size
+/// of the string is reflected in the `cmdsize` field of the load command.
+/// Once again any padded bytes to bring the `cmdsize` field to a multiple
+/// of 4 bytes must be zero.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct LcStr<E: Endian> {
+    /// offset to the string
+    pub offset: U32<E>,
+}
+
+/// 32-bit segment load command.
+///
+/// The segment load command indicates that a part of this file is to be
+/// mapped into the task's address space.  The size of this segment in memory,
+/// vmsize, maybe equal to or larger than the amount to map from this file,
+/// filesize.  The file is mapped starting at fileoff to the beginning of
+/// the segment in memory, vmaddr.  The rest of the memory of the segment,
+/// if any, is allocated zero fill on demand.  The segment's maximum virtual
+/// memory protection and initial virtual memory protection are specified
+/// by the maxprot and initprot fields.  If the segment has sections then the
+/// `Section32` structures directly follow the segment command and their size is
+/// reflected in `cmdsize`.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct SegmentCommand32<E: Endian> {
+    /// LC_SEGMENT
+    pub cmd: U32<E>,
+    /// includes sizeof section structs
+    pub cmdsize: U32<E>,
+    /// segment name
+    pub segname: [u8; 16],
+    /// memory address of this segment
+    pub vmaddr: U32<E>,
+    /// memory size of this segment
+    pub vmsize: U32<E>,
+    /// file offset of this segment
+    pub fileoff: U32<E>,
+    /// amount to map from the file
+    pub filesize: U32<E>,
+    /// maximum VM protection
+    pub maxprot: U32<E>,
+    /// initial VM protection
+    pub initprot: U32<E>,
+    /// number of sections in segment
+    pub nsects: U32<E>,
+    /// flags
+    pub flags: U32<E>,
+}
+
+/// 64-bit segment load command.
+///
+/// The 64-bit segment load command indicates that a part of this file is to be
+/// mapped into a 64-bit task's address space.  If the 64-bit segment has
+/// sections then `Section64` structures directly follow the 64-bit segment
+/// command and their size is reflected in `cmdsize`.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct SegmentCommand64<E: Endian> {
+    /// LC_SEGMENT_64
+    pub cmd: U32<E>,
+    /// includes sizeof section_64 structs
+    pub cmdsize: U32<E>,
+    /// segment name
+    pub segname: [u8; 16],
+    /// memory address of this segment
+    pub vmaddr: U64<E>,
+    /// memory size of this segment
+    pub vmsize: U64<E>,
+    /// file offset of this segment
+    pub fileoff: U64<E>,
+    /// amount to map from the file
+    pub filesize: U64<E>,
+    /// maximum VM protection
+    pub maxprot: U32<E>,
+    /// initial VM protection
+    pub initprot: U32<E>,
+    /// number of sections in segment
+    pub nsects: U32<E>,
+    /// flags
+    pub flags: U32<E>,
+}
+
+// Values for `SegmentCommand*::flags`.
+/// the file contents for this segment is for the high part of the VM space, the low part is zero filled (for stacks in core files)
+pub const SG_HIGHVM: u32 = 0x1;
+/// this segment is the VM that is allocated by a fixed VM library, for overlap checking in the link editor
+pub const SG_FVMLIB: u32 = 0x2;
+/// this segment has nothing that was relocated in it and nothing relocated to it, that is it maybe safely replaced without relocation
+pub const SG_NORELOC: u32 = 0x4;
+/// This segment is protected.  If the segment starts at file offset 0, the first page of the segment is not protected.  All other pages of the segment are protected.
+pub const SG_PROTECTED_VERSION_1: u32 = 0x8;
+/// This segment is made read-only after fixups
+pub const SG_READ_ONLY: u32 = 0x10;
+
+/*
+ * A segment is made up of zero or more sections.  Non-MH_OBJECT files have
+ * all of their segments with the proper sections in each, and padded to the
+ * specified segment alignment when produced by the link editor.  The first
+ * segment of a MH_EXECUTE and MH_FVMLIB format file contains the mach_header
+ * and load commands of the object file before its first section.  The zero
+ * fill sections are always last in their segment (in all formats).  This
+ * allows the zeroed segment padding to be mapped into memory where zero fill
+ * sections might be. The gigabyte zero fill sections, those with the section
+ * type S_GB_ZEROFILL, can only be in a segment with sections of this type.
+ * These segments are then placed after all other segments.
+ *
+ * The MH_OBJECT format has all of its sections in one segment for
+ * compactness.  There is no padding to a specified segment boundary and the
+ * mach_header and load commands are not part of the segment.
+ *
+ * Sections with the same section name, sectname, going into the same segment,
+ * segname, are combined by the link editor.  The resulting section is aligned
+ * to the maximum alignment of the combined sections and is the new section's
+ * alignment.  The combined sections are aligned to their original alignment in
+ * the combined section.  Any padded bytes to get the specified alignment are
+ * zeroed.
+ *
+ * The format of the relocation entries referenced by the reloff and nreloc
+ * fields of the section structure for mach object files is described in the
+ * header file <reloc.h>.
+ */
+/// 32-bit section.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct Section32<E: Endian> {
+    /// name of this section
+    pub sectname: [u8; 16],
+    /// segment this section goes in
+    pub segname: [u8; 16],
+    /// memory address of this section
+    pub addr: U32<E>,
+    /// size in bytes of this section
+    pub size: U32<E>,
+    /// file offset of this section
+    pub offset: U32<E>,
+    /// section alignment (power of 2)
+    pub align: U32<E>,
+    /// file offset of relocation entries
+    pub reloff: U32<E>,
+    /// number of relocation entries
+    pub nreloc: U32<E>,
+    /// flags (section type and attributes)
+    pub flags: U32<E>,
+    /// reserved (for offset or index)
+    pub reserved1: U32<E>,
+    /// reserved (for count or sizeof)
+    pub reserved2: U32<E>,
+}
+
+/// 64-bit section.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct Section64<E: Endian> {
+    /// name of this section
+    pub sectname: [u8; 16],
+    /// segment this section goes in
+    pub segname: [u8; 16],
+    /// memory address of this section
+    pub addr: U64<E>,
+    /// size in bytes of this section
+    pub size: U64<E>,
+    /// file offset of this section
+    pub offset: U32<E>,
+    /// section alignment (power of 2)
+    pub align: U32<E>,
+    /// file offset of relocation entries
+    pub reloff: U32<E>,
+    /// number of relocation entries
+    pub nreloc: U32<E>,
+    /// flags (section type and attributes)
+    pub flags: U32<E>,
+    /// reserved (for offset or index)
+    pub reserved1: U32<E>,
+    /// reserved (for count or sizeof)
+    pub reserved2: U32<E>,
+    /// reserved
+    pub reserved3: U32<E>,
+}
+
+/*
+ * The flags field of a section structure is separated into two parts a section
+ * type and section attributes.  The section types are mutually exclusive (it
+ * can only have one type) but the section attributes are not (it may have more
+ * than one attribute).
+ */
+/// 256 section types
+pub const SECTION_TYPE: u32 = 0x0000_00ff;
+/// 24 section attributes
+pub const SECTION_ATTRIBUTES: u32 = 0xffff_ff00;
+
+/* Constants for the type of a section */
+/// regular section
+pub const S_REGULAR: u32 = 0x0;
+/// zero fill on demand section
+pub const S_ZEROFILL: u32 = 0x1;
+/// section with only literal C strings
+pub const S_CSTRING_LITERALS: u32 = 0x2;
+/// section with only 4 byte literals
+pub const S_4BYTE_LITERALS: u32 = 0x3;
+/// section with only 8 byte literals
+pub const S_8BYTE_LITERALS: u32 = 0x4;
+/// section with only pointers to literals
+pub const S_LITERAL_POINTERS: u32 = 0x5;
+/*
+ * For the two types of symbol pointers sections and the symbol stubs section
+ * they have indirect symbol table entries.  For each of the entries in the
+ * section the indirect symbol table entries, in corresponding order in the
+ * indirect symbol table, start at the index stored in the reserved1 field
+ * of the section structure.  Since the indirect symbol table entries
+ * correspond to the entries in the section the number of indirect symbol table
+ * entries is inferred from the size of the section divided by the size of the
+ * entries in the section.  For symbol pointers sections the size of the entries
+ * in the section is 4 bytes and for symbol stubs sections the byte size of the
+ * stubs is stored in the reserved2 field of the section structure.
+ */
+/// section with only non-lazy symbol pointers
+pub const S_NON_LAZY_SYMBOL_POINTERS: u32 = 0x6;
+/// section with only lazy symbol pointers
+pub const S_LAZY_SYMBOL_POINTERS: u32 = 0x7;
+/// section with only symbol stubs, byte size of stub in the reserved2 field
+pub const S_SYMBOL_STUBS: u32 = 0x8;
+/// section with only function pointers for initialization
+pub const S_MOD_INIT_FUNC_POINTERS: u32 = 0x9;
+/// section with only function pointers for termination
+pub const S_MOD_TERM_FUNC_POINTERS: u32 = 0xa;
+/// section contains symbols that are to be coalesced
+pub const S_COALESCED: u32 = 0xb;
+/// zero fill on demand section (that can be larger than 4 gigabytes)
+pub const S_GB_ZEROFILL: u32 = 0xc;
+/// section with only pairs of function pointers for interposing
+pub const S_INTERPOSING: u32 = 0xd;
+/// section with only 16 byte literals
+pub const S_16BYTE_LITERALS: u32 = 0xe;
+/// section contains DTrace Object Format
+pub const S_DTRACE_DOF: u32 = 0xf;
+/// section with only lazy symbol pointers to lazy loaded dylibs
+pub const S_LAZY_DYLIB_SYMBOL_POINTERS: u32 = 0x10;
+/*
+ * Section types to support thread local variables
+ */
+/// template of initial values for TLVs
+pub const S_THREAD_LOCAL_REGULAR: u32 = 0x11;
+/// template of initial values for TLVs
+pub const S_THREAD_LOCAL_ZEROFILL: u32 = 0x12;
+/// TLV descriptors
+pub const S_THREAD_LOCAL_VARIABLES: u32 = 0x13;
+/// pointers to TLV descriptors
+pub const S_THREAD_LOCAL_VARIABLE_POINTERS: u32 = 0x14;
+/// functions to call to initialize TLV values
+pub const S_THREAD_LOCAL_INIT_FUNCTION_POINTERS: u32 = 0x15;
+/// 32-bit offsets to initializers
+pub const S_INIT_FUNC_OFFSETS: u32 = 0x16;
+
+/*
+ * Constants for the section attributes part of the flags field of a section
+ * structure.
+ */
+/// User setable attributes
+pub const SECTION_ATTRIBUTES_USR: u32 = 0xff00_0000;
+/// section contains only true machine instructions
+pub const S_ATTR_PURE_INSTRUCTIONS: u32 = 0x8000_0000;
+/// section contains coalesced symbols that are not to be in a ranlib table of contents
+pub const S_ATTR_NO_TOC: u32 = 0x4000_0000;
+/// ok to strip static symbols in this section in files with the MH_DYLDLINK flag
+pub const S_ATTR_STRIP_STATIC_SYMS: u32 = 0x2000_0000;
+/// no dead stripping
+pub const S_ATTR_NO_DEAD_STRIP: u32 = 0x1000_0000;
+/// blocks are live if they reference live blocks
+pub const S_ATTR_LIVE_SUPPORT: u32 = 0x0800_0000;
+/// Used with i386 code stubs written on by dyld
+pub const S_ATTR_SELF_MODIFYING_CODE: u32 = 0x0400_0000;
+/*
+ * If a segment contains any sections marked with S_ATTR_DEBUG then all
+ * sections in that segment must have this attribute.  No section other than
+ * a section marked with this attribute may reference the contents of this
+ * section.  A section with this attribute may contain no symbols and must have
+ * a section type S_REGULAR.  The static linker will not copy section contents
+ * from sections with this attribute into its output file.  These sections
+ * generally contain DWARF debugging info.
+ */
+/// a debug section
+pub const S_ATTR_DEBUG: u32 = 0x0200_0000;
+/// system setable attributes
+pub const SECTION_ATTRIBUTES_SYS: u32 = 0x00ff_ff00;
+/// section contains some machine instructions
+pub const S_ATTR_SOME_INSTRUCTIONS: u32 = 0x0000_0400;
+/// section has external relocation entries
+pub const S_ATTR_EXT_RELOC: u32 = 0x0000_0200;
+/// section has local relocation entries
+pub const S_ATTR_LOC_RELOC: u32 = 0x0000_0100;
+
+/*
+ * The names of segments and sections in them are mostly meaningless to the
+ * link-editor.  But there are few things to support traditional UNIX
+ * executables that require the link-editor and assembler to use some names
+ * agreed upon by convention.
+ *
+ * The initial protection of the "__TEXT" segment has write protection turned
+ * off (not writeable).
+ *
+ * The link-editor will allocate common symbols at the end of the "__common"
+ * section in the "__DATA" segment.  It will create the section and segment
+ * if needed.
+ */
+
+/* The currently known segment names and the section names in those segments */
+
+/// the pagezero segment which has no protections and catches NULL references for MH_EXECUTE files
+pub const SEG_PAGEZERO: &str = "__PAGEZERO";
+
+/// the tradition UNIX text segment
+pub const SEG_TEXT: &str = "__TEXT";
+/// the real text part of the text section no headers, and no padding
+pub const SECT_TEXT: &str = "__text";
+/// the fvmlib initialization section
+pub const SECT_FVMLIB_INIT0: &str = "__fvmlib_init0";
+/// the section following the fvmlib initialization section
+pub const SECT_FVMLIB_INIT1: &str = "__fvmlib_init1";
+
+/// the tradition UNIX data segment
+pub const SEG_DATA: &str = "__DATA";
+/// the real initialized data section no padding, no bss overlap
+pub const SECT_DATA: &str = "__data";
+/// the real uninitialized data section no padding
+pub const SECT_BSS: &str = "__bss";
+/// the section common symbols are allocated in by the link editor
+pub const SECT_COMMON: &str = "__common";
+
+/// objective-C runtime segment
+pub const SEG_OBJC: &str = "__OBJC";
+/// symbol table
+pub const SECT_OBJC_SYMBOLS: &str = "__symbol_table";
+/// module information
+pub const SECT_OBJC_MODULES: &str = "__module_info";
+/// string table
+pub const SECT_OBJC_STRINGS: &str = "__selector_strs";
+/// string table
+pub const SECT_OBJC_REFS: &str = "__selector_refs";
+
+/// the icon segment
+pub const SEG_ICON: &str = "__ICON";
+/// the icon headers
+pub const SECT_ICON_HEADER: &str = "__header";
+/// the icons in tiff format
+pub const SECT_ICON_TIFF: &str = "__tiff";
+
+/// the segment containing all structs created and maintained by the link editor.  Created with -seglinkedit option to ld(1) for MH_EXECUTE and FVMLIB file types only
+pub const SEG_LINKEDIT: &str = "__LINKEDIT";
+
+/// the segment overlapping with linkedit containing linking information
+pub const SEG_LINKINFO: &str = "__LINKINFO";
+
+/// the unix stack segment
+pub const SEG_UNIXSTACK: &str = "__UNIXSTACK";
+
+/// the segment for the self (dyld) modifing code stubs that has read, write and execute permissions
+pub const SEG_IMPORT: &str = "__IMPORT";
+
+/*
+ * Fixed virtual memory shared libraries are identified by two things.  The
+ * target pathname (the name of the library as found for execution), and the
+ * minor version number.  The address of where the headers are loaded is in
+ * header_addr. (THIS IS OBSOLETE and no longer supported).
+ */
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct Fvmlib<E: Endian> {
+    /// library's target pathname
+    pub name: LcStr<E>,
+    /// library's minor version number
+    pub minor_version: U32<E>,
+    /// library's header address
+    pub header_addr: U32<E>,
+}
+
+/*
+ * A fixed virtual shared library (filetype == MH_FVMLIB in the mach header)
+ * contains a `FvmlibCommand` (cmd == LC_IDFVMLIB) to identify the library.
+ * An object that uses a fixed virtual shared library also contains a
+ * `FvmlibCommand` (cmd == LC_LOADFVMLIB) for each library it uses.
+ * (THIS IS OBSOLETE and no longer supported).
+ */
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct FvmlibCommand<E: Endian> {
+    /// LC_IDFVMLIB or LC_LOADFVMLIB
+    pub cmd: U32<E>,
+    /// includes pathname string
+    pub cmdsize: U32<E>,
+    /// the library identification
+    pub fvmlib: Fvmlib<E>,
+}
+
+/*
+ * Dynamicly linked shared libraries are identified by two things.  The
+ * pathname (the name of the library as found for execution), and the
+ * compatibility version number.  The pathname must match and the compatibility
+ * number in the user of the library must be greater than or equal to the
+ * library being used.  The time stamp is used to record the time a library was
+ * built and copied into user so it can be use to determined if the library used
+ * at runtime is exactly the same as used to built the program.
+ */
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct Dylib<E: Endian> {
+    /// library's path name
+    pub name: LcStr<E>,
+    /// library's build time stamp
+    pub timestamp: U32<E>,
+    /// library's current version number
+    pub current_version: U32<E>,
+    /// library's compatibility vers number
+    pub compatibility_version: U32<E>,
+}
+
+/*
+ * A dynamically linked shared library (filetype == MH_DYLIB in the mach header)
+ * contains a `DylibCommand` (cmd == LC_ID_DYLIB) to identify the library.
+ * An object that uses a dynamically linked shared library also contains a
+ * `DylibCommand` (cmd == LC_LOAD_DYLIB, LC_LOAD_WEAK_DYLIB, or
+ * LC_REEXPORT_DYLIB) for each library it uses.
+ */
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct DylibCommand<E: Endian> {
+    /// LC_ID_DYLIB, LC_LOAD_{,WEAK_}DYLIB, LC_REEXPORT_DYLIB
+    pub cmd: U32<E>,
+    /// includes pathname string
+    pub cmdsize: U32<E>,
+    /// the library identification
+    pub dylib: Dylib<E>,
+}
+
+/*
+ * A dynamically linked shared library may be a subframework of an umbrella
+ * framework.  If so it will be linked with "-umbrella umbrella_name" where
+ * Where "umbrella_name" is the name of the umbrella framework. A subframework
+ * can only be linked against by its umbrella framework or other subframeworks
+ * that are part of the same umbrella framework.  Otherwise the static link
+ * editor produces an error and states to link against the umbrella framework.
+ * The name of the umbrella framework for subframeworks is recorded in the
+ * following structure.
+ */
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct SubFrameworkCommand<E: Endian> {
+    /// LC_SUB_FRAMEWORK
+    pub cmd: U32<E>,
+    /// includes umbrella string
+    pub cmdsize: U32<E>,
+    /// the umbrella framework name
+    pub umbrella: LcStr<E>,
+}
+
+/*
+ * For dynamically linked shared libraries that are subframework of an umbrella
+ * framework they can allow clients other than the umbrella framework or other
+ * subframeworks in the same umbrella framework.  To do this the subframework
+ * is built with "-allowable_client client_name" and an LC_SUB_CLIENT load
+ * command is created for each -allowable_client flag.  The client_name is
+ * usually a framework name.  It can also be a name used for bundles clients
+ * where the bundle is built with "-client_name client_name".
+ */
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct SubClientCommand<E: Endian> {
+    /// LC_SUB_CLIENT
+    pub cmd: U32<E>,
+    /// includes client string
+    pub cmdsize: U32<E>,
+    /// the client name
+    pub client: LcStr<E>,
+}
+
+/*
+ * A dynamically linked shared library may be a sub_umbrella of an umbrella
+ * framework.  If so it will be linked with "-sub_umbrella umbrella_name" where
+ * Where "umbrella_name" is the name of the sub_umbrella framework.  When
+ * staticly linking when -twolevel_namespace is in effect a twolevel namespace
+ * umbrella framework will only cause its subframeworks and those frameworks
+ * listed as sub_umbrella frameworks to be implicited linked in.  Any other
+ * dependent dynamic libraries will not be linked it when -twolevel_namespace
+ * is in effect.  The primary library recorded by the static linker when
+ * resolving a symbol in these libraries will be the umbrella framework.
+ * Zero or more sub_umbrella frameworks may be use by an umbrella framework.
+ * The name of a sub_umbrella framework is recorded in the following structure.
+ */
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct SubUmbrellaCommand<E: Endian> {
+    /// LC_SUB_UMBRELLA
+    pub cmd: U32<E>,
+    /// includes sub_umbrella string
+    pub cmdsize: U32<E>,
+    /// the sub_umbrella framework name
+    pub sub_umbrella: LcStr<E>,
+}
+
+/*
+ * A dynamically linked shared library may be a sub_library of another shared
+ * library.  If so it will be linked with "-sub_library library_name" where
+ * Where "library_name" is the name of the sub_library shared library.  When
+ * staticly linking when -twolevel_namespace is in effect a twolevel namespace
+ * shared library will only cause its subframeworks and those frameworks
+ * listed as sub_umbrella frameworks and libraries listed as sub_libraries to
+ * be implicited linked in.  Any other dependent dynamic libraries will not be
+ * linked it when -twolevel_namespace is in effect.  The primary library
+ * recorded by the static linker when resolving a symbol in these libraries
+ * will be the umbrella framework (or dynamic library). Zero or more sub_library
+ * shared libraries may be use by an umbrella framework or (or dynamic library).
+ * The name of a sub_library framework is recorded in the following structure.
+ * For example /usr/lib/libobjc_profile.A.dylib would be recorded as "libobjc".
+ */
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct SubLibraryCommand<E: Endian> {
+    /// LC_SUB_LIBRARY
+    pub cmd: U32<E>,
+    /// includes sub_library string
+    pub cmdsize: U32<E>,
+    /// the sub_library name
+    pub sub_library: LcStr<E>,
+}
+
+/*
+ * A program (filetype == MH_EXECUTE) that is
+ * prebound to its dynamic libraries has one of these for each library that
+ * the static linker used in prebinding.  It contains a bit vector for the
+ * modules in the library.  The bits indicate which modules are bound (1) and
+ * which are not (0) from the library.  The bit for module 0 is the low bit
+ * of the first byte.  So the bit for the Nth module is:
+ * (linked_modules[N/8] >> N%8) & 1
+ */
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct PreboundDylibCommand<E: Endian> {
+    /// LC_PREBOUND_DYLIB
+    pub cmd: U32<E>,
+    /// includes strings
+    pub cmdsize: U32<E>,
+    /// library's path name
+    pub name: LcStr<E>,
+    /// number of modules in library
+    pub nmodules: U32<E>,
+    /// bit vector of linked modules
+    pub linked_modules: LcStr<E>,
+}
+
+/*
+ * A program that uses a dynamic linker contains a `DylinkerCommand` to identify
+ * the name of the dynamic linker (LC_LOAD_DYLINKER).  And a dynamic linker
+ * contains a `DylinkerCommand` to identify the dynamic linker (LC_ID_DYLINKER).
+ * A file can have at most one of these.
+ * This struct is also used for the LC_DYLD_ENVIRONMENT load command and
+ * contains string for dyld to treat like environment variable.
+ */
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct DylinkerCommand<E: Endian> {
+    /// LC_ID_DYLINKER, LC_LOAD_DYLINKER or LC_DYLD_ENVIRONMENT
+    pub cmd: U32<E>,
+    /// includes pathname string
+    pub cmdsize: U32<E>,
+    /// dynamic linker's path name
+    pub name: LcStr<E>,
+}
+
+/*
+ * Thread commands contain machine-specific data structures suitable for
+ * use in the thread state primitives.  The machine specific data structures
+ * follow the struct `ThreadCommand` as follows.
+ * Each flavor of machine specific data structure is preceded by an uint32_t
+ * constant for the flavor of that data structure, an uint32_t that is the
+ * count of uint32_t's of the size of the state data structure and then
+ * the state data structure follows.  This triple may be repeated for many
+ * flavors.  The constants for the flavors, counts and state data structure
+ * definitions are expected to be in the header file <machine/thread_status.h>.
+ * These machine specific data structures sizes must be multiples of
+ * 4 bytes.  The `cmdsize` reflects the total size of the `ThreadCommand`
+ * and all of the sizes of the constants for the flavors, counts and state
+ * data structures.
+ *
+ * For executable objects that are unix processes there will be one
+ * `ThreadCommand` (cmd == LC_UNIXTHREAD) created for it by the link-editor.
+ * This is the same as a LC_THREAD, except that a stack is automatically
+ * created (based on the shell's limit for the stack size).  Command arguments
+ * and environment variables are copied onto that stack.
+ */
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ThreadCommand<E: Endian> {
+    /// LC_THREAD or  LC_UNIXTHREAD
+    pub cmd: U32<E>,
+    /// total size of this command
+    pub cmdsize: U32<E>,
+    /* uint32_t flavor		   flavor of thread state */
+    /* uint32_t count		   count of uint32_t's in thread state */
+    /* struct XXX_thread_state state   thread state for this flavor */
+    /* ... */
+}
+
+/*
+ * The routines command contains the address of the dynamic shared library
+ * initialization routine and an index into the module table for the module
+ * that defines the routine.  Before any modules are used from the library the
+ * dynamic linker fully binds the module that defines the initialization routine
+ * and then calls it.  This gets called before any module initialization
+ * routines (used for C++ static constructors) in the library.
+ */
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct RoutinesCommand32<E: Endian> {
+    /* for 32-bit architectures */
+    /// LC_ROUTINES
+    pub cmd: U32<E>,
+    /// total size of this command
+    pub cmdsize: U32<E>,
+    /// address of initialization routine
+    pub init_address: U32<E>,
+    /// index into the module table that the init routine is defined in
+    pub init_module: U32<E>,
+    pub reserved1: U32<E>,
+    pub reserved2: U32<E>,
+    pub reserved3: U32<E>,
+    pub reserved4: U32<E>,
+    pub reserved5: U32<E>,
+    pub reserved6: U32<E>,
+}
+
+/*
+ * The 64-bit routines command.  Same use as above.
+ */
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct RoutinesCommand64<E: Endian> {
+    /* for 64-bit architectures */
+    /// LC_ROUTINES_64
+    pub cmd: U32<E>,
+    /// total size of this command
+    pub cmdsize: U32<E>,
+    /// address of initialization routine
+    pub init_address: U64<E>,
+    /// index into the module table that the init routine is defined in
+    pub init_module: U64<E>,
+    pub reserved1: U64<E>,
+    pub reserved2: U64<E>,
+    pub reserved3: U64<E>,
+    pub reserved4: U64<E>,
+    pub reserved5: U64<E>,
+    pub reserved6: U64<E>,
+}
+
+/*
+ * The `SymtabCommand` contains the offsets and sizes of the link-edit 4.3BSD
+ * "stab" style symbol table information as described in the header files
+ * <nlist.h> and <stab.h>.
+ */
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct SymtabCommand<E: Endian> {
+    /// LC_SYMTAB
+    pub cmd: U32<E>,
+    /// sizeof(struct SymtabCommand)
+    pub cmdsize: U32<E>,
+    /// symbol table offset
+    pub symoff: U32<E>,
+    /// number of symbol table entries
+    pub nsyms: U32<E>,
+    /// string table offset
+    pub stroff: U32<E>,
+    /// string table size in bytes
+    pub strsize: U32<E>,
+}
+
+/*
+ * This is the second set of the symbolic information which is used to support
+ * the data structures for the dynamically link editor.
+ *
+ * The original set of symbolic information in the `SymtabCommand` which contains
+ * the symbol and string tables must also be present when this load command is
+ * present.  When this load command is present the symbol table is organized
+ * into three groups of symbols:
+ *	local symbols (static and debugging symbols) - grouped by module
+ *	defined external symbols - grouped by module (sorted by name if not lib)
+ *	undefined external symbols (sorted by name if MH_BINDATLOAD is not set,
+ *	     			    and in order the were seen by the static
+ *				    linker if MH_BINDATLOAD is set)
+ * In this load command there are offsets and counts to each of the three groups
+ * of symbols.
+ *
+ * This load command contains a the offsets and sizes of the following new
+ * symbolic information tables:
+ *	table of contents
+ *	module table
+ *	reference symbol table
+ *	indirect symbol table
+ * The first three tables above (the table of contents, module table and
+ * reference symbol table) are only present if the file is a dynamically linked
+ * shared library.  For executable and object modules, which are files
+ * containing only one module, the information that would be in these three
+ * tables is determined as follows:
+ * 	table of contents - the defined external symbols are sorted by name
+ *	module table - the file contains only one module so everything in the
+ *		       file is part of the module.
+ *	reference symbol table - is the defined and undefined external symbols
+ *
+ * For dynamically linked shared library files this load command also contains
+ * offsets and sizes to the pool of relocation entries for all sections
+ * separated into two groups:
+ *	external relocation entries
+ *	local relocation entries
+ * For executable and object modules the relocation entries continue to hang
+ * off the section structures.
+ */
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct DysymtabCommand<E: Endian> {
+    /// LC_DYSYMTAB
+    pub cmd: U32<E>,
+    /// sizeof(struct DysymtabCommand)
+    pub cmdsize: U32<E>,
+
+    /*
+     * The symbols indicated by symoff and nsyms of the LC_SYMTAB load command
+     * are grouped into the following three groups:
+     *    local symbols (further grouped by the module they are from)
+     *    defined external symbols (further grouped by the module they are from)
+     *    undefined symbols
+     *
+     * The local symbols are used only for debugging.  The dynamic binding
+     * process may have to use them to indicate to the debugger the local
+     * symbols for a module that is being bound.
+     *
+     * The last two groups are used by the dynamic binding process to do the
+     * binding (indirectly through the module table and the reference symbol
+     * table when this is a dynamically linked shared library file).
+     */
+    /// index to local symbols
+    pub ilocalsym: U32<E>,
+    /// number of local symbols
+    pub nlocalsym: U32<E>,
+
+    /// index to externally defined symbols
+    pub iextdefsym: U32<E>,
+    /// number of externally defined symbols
+    pub nextdefsym: U32<E>,
+
+    /// index to undefined symbols
+    pub iundefsym: U32<E>,
+    /// number of undefined symbols
+    pub nundefsym: U32<E>,
+
+    /*
+     * For the for the dynamic binding process to find which module a symbol
+     * is defined in the table of contents is used (analogous to the ranlib
+     * structure in an archive) which maps defined external symbols to modules
+     * they are defined in.  This exists only in a dynamically linked shared
+     * library file.  For executable and object modules the defined external
+     * symbols are sorted by name and is use as the table of contents.
+     */
+    /// file offset to table of contents
+    pub tocoff: U32<E>,
+    /// number of entries in table of contents
+    pub ntoc: U32<E>,
+
+    /*
+     * To support dynamic binding of "modules" (whole object files) the symbol
+     * table must reflect the modules that the file was created from.  This is
+     * done by having a module table that has indexes and counts into the merged
+     * tables for each module.  The module structure that these two entries
+     * refer to is described below.  This exists only in a dynamically linked
+     * shared library file.  For executable and object modules the file only
+     * contains one module so everything in the file belongs to the module.
+     */
+    /// file offset to module table
+    pub modtaboff: U32<E>,
+    /// number of module table entries
+    pub nmodtab: U32<E>,
+
+    /*
+     * To support dynamic module binding the module structure for each module
+     * indicates the external references (defined and undefined) each module
+     * makes.  For each module there is an offset and a count into the
+     * reference symbol table for the symbols that the module references.
+     * This exists only in a dynamically linked shared library file.  For
+     * executable and object modules the defined external symbols and the
+     * undefined external symbols indicates the external references.
+     */
+    /// offset to referenced symbol table
+    pub extrefsymoff: U32<E>,
+    /// number of referenced symbol table entries
+    pub nextrefsyms: U32<E>,
+
+    /*
+     * The sections that contain "symbol pointers" and "routine stubs" have
+     * indexes and (implied counts based on the size of the section and fixed
+     * size of the entry) into the "indirect symbol" table for each pointer
+     * and stub.  For every section of these two types the index into the
+     * indirect symbol table is stored in the section header in the field
+     * reserved1.  An indirect symbol table entry is simply a 32bit index into
+     * the symbol table to the symbol that the pointer or stub is referring to.
+     * The indirect symbol table is ordered to match the entries in the section.
+     */
+    /// file offset to the indirect symbol table
+    pub indirectsymoff: U32<E>,
+    /// number of indirect symbol table entries
+    pub nindirectsyms: U32<E>,
+
+    /*
+     * To support relocating an individual module in a library file quickly the
+     * external relocation entries for each module in the library need to be
+     * accessed efficiently.  Since the relocation entries can't be accessed
+     * through the section headers for a library file they are separated into
+     * groups of local and external entries further grouped by module.  In this
+     * case the presents of this load command who's extreloff, nextrel,
+     * locreloff and nlocrel fields are non-zero indicates that the relocation
+     * entries of non-merged sections are not referenced through the section
+     * structures (and the reloff and nreloc fields in the section headers are
+     * set to zero).
+     *
+     * Since the relocation entries are not accessed through the section headers
+     * this requires the r_address field to be something other than a section
+     * offset to identify the item to be relocated.  In this case r_address is
+     * set to the offset from the vmaddr of the first LC_SEGMENT command.
+     * For MH_SPLIT_SEGS images r_address is set to the the offset from the
+     * vmaddr of the first read-write LC_SEGMENT command.
+     *
+     * The relocation entries are grouped by module and the module table
+     * entries have indexes and counts into them for the group of external
+     * relocation entries for that the module.
+     *
+     * For sections that are merged across modules there must not be any
+     * remaining external relocation entries for them (for merged sections
+     * remaining relocation entries must be local).
+     */
+    /// offset to external relocation entries
+    pub extreloff: U32<E>,
+    /// number of external relocation entries
+    pub nextrel: U32<E>,
+
+    /*
+     * All the local relocation entries are grouped together (they are not
+     * grouped by their module since they are only used if the object is moved
+     * from it staticly link edited address).
+     */
+    /// offset to local relocation entries
+    pub locreloff: U32<E>,
+    /// number of local relocation entries
+    pub nlocrel: U32<E>,
+}
+
+/*
+ * An indirect symbol table entry is simply a 32bit index into the symbol table
+ * to the symbol that the pointer or stub is refering to.  Unless it is for a
+ * non-lazy symbol pointer section for a defined symbol which strip(1) as
+ * removed.  In which case it has the value INDIRECT_SYMBOL_LOCAL.  If the
+ * symbol was also absolute INDIRECT_SYMBOL_ABS is or'ed with that.
+ */
+pub const INDIRECT_SYMBOL_LOCAL: u32 = 0x8000_0000;
+pub const INDIRECT_SYMBOL_ABS: u32 = 0x4000_0000;
+
+/* a table of contents entry */
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct DylibTableOfContents<E: Endian> {
+    /// the defined external symbol (index into the symbol table)
+    pub symbol_index: U32<E>,
+    /// index into the module table this symbol is defined in
+    pub module_index: U32<E>,
+}
+
+/* a module table entry */
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct DylibModule32<E: Endian> {
+    /// the module name (index into string table)
+    pub module_name: U32<E>,
+
+    /// index into externally defined symbols
+    pub iextdefsym: U32<E>,
+    /// number of externally defined symbols
+    pub nextdefsym: U32<E>,
+    /// index into reference symbol table
+    pub irefsym: U32<E>,
+    /// number of reference symbol table entries
+    pub nrefsym: U32<E>,
+    /// index into symbols for local symbols
+    pub ilocalsym: U32<E>,
+    /// number of local symbols
+    pub nlocalsym: U32<E>,
+
+    /// index into external relocation entries
+    pub iextrel: U32<E>,
+    /// number of external relocation entries
+    pub nextrel: U32<E>,
+
+    /// low 16 bits are the index into the init section, high 16 bits are the index into the term section
+    pub iinit_iterm: U32<E>,
+    /// low 16 bits are the number of init section entries, high 16 bits are the number of term section entries
+    pub ninit_nterm: U32<E>,
+
+    /// for this module address of the start of the (__OBJC,__module_info) section
+    pub objc_module_info_addr: U32<E>,
+    /// for this module size of the (__OBJC,__module_info) section
+    pub objc_module_info_size: U32<E>,
+}
+
+/* a 64-bit module table entry */
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct DylibModule64<E: Endian> {
+    /// the module name (index into string table)
+    pub module_name: U32<E>,
+
+    /// index into externally defined symbols
+    pub iextdefsym: U32<E>,
+    /// number of externally defined symbols
+    pub nextdefsym: U32<E>,
+    /// index into reference symbol table
+    pub irefsym: U32<E>,
+    /// number of reference symbol table entries
+    pub nrefsym: U32<E>,
+    /// index into symbols for local symbols
+    pub ilocalsym: U32<E>,
+    /// number of local symbols
+    pub nlocalsym: U32<E>,
+
+    /// index into external relocation entries
+    pub iextrel: U32<E>,
+    /// number of external relocation entries
+    pub nextrel: U32<E>,
+
+    /// low 16 bits are the index into the init section, high 16 bits are the index into the term section
+    pub iinit_iterm: U32<E>,
+    /// low 16 bits are the number of init section entries, high 16 bits are the number of term section entries
+    pub ninit_nterm: U32<E>,
+
+    /// for this module size of the (__OBJC,__module_info) section
+    pub objc_module_info_size: U32<E>,
+    /// for this module address of the start of the (__OBJC,__module_info) section
+    pub objc_module_info_addr: U64<E>,
+}
+
+/*
+ * The entries in the reference symbol table are used when loading the module
+ * (both by the static and dynamic link editors) and if the module is unloaded
+ * or replaced.  Therefore all external symbols (defined and undefined) are
+ * listed in the module's reference table.  The flags describe the type of
+ * reference that is being made.  The constants for the flags are defined in
+ * <mach-o/nlist.h> as they are also used for symbol table entries.
+ */
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct DylibReference<E: Endian> {
+    /* TODO:
+    uint32_t isym:24,		/* index into the symbol table */
+              flags:8;	/* flags to indicate the type of reference */
+    */
+    pub bitfield: U32<E>,
+}
+
+/*
+ * The TwolevelHintsCommand contains the offset and number of hints in the
+ * two-level namespace lookup hints table.
+ */
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct TwolevelHintsCommand<E: Endian> {
+    /// LC_TWOLEVEL_HINTS
+    pub cmd: U32<E>,
+    /// sizeof(struct TwolevelHintsCommand)
+    pub cmdsize: U32<E>,
+    /// offset to the hint table
+    pub offset: U32<E>,
+    /// number of hints in the hint table
+    pub nhints: U32<E>,
+}
+
+/*
+ * The entries in the two-level namespace lookup hints table are TwolevelHint
+ * structs.  These provide hints to the dynamic link editor where to start
+ * looking for an undefined symbol in a two-level namespace image.  The
+ * isub_image field is an index into the sub-images (sub-frameworks and
+ * sub-umbrellas list) that made up the two-level image that the undefined
+ * symbol was found in when it was built by the static link editor.  If
+ * isub-image is 0 the the symbol is expected to be defined in library and not
+ * in the sub-images.  If isub-image is non-zero it is an index into the array
+ * of sub-images for the umbrella with the first index in the sub-images being
+ * 1. The array of sub-images is the ordered list of sub-images of the umbrella
+ * that would be searched for a symbol that has the umbrella recorded as its
+ * primary library.  The table of contents index is an index into the
+ * library's table of contents.  This is used as the starting point of the
+ * binary search or a directed linear search.
+ */
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct TwolevelHint<E: Endian> {
+    /* TODO:
+    uint32_t
+    isub_image:8,	/* index into the sub images */
+    itoc:24;	/* index into the table of contents */
+    */
+    pub bitfield: U32<E>,
+}
+
+/*
+ * The PrebindCksumCommand contains the value of the original check sum for
+ * prebound files or zero.  When a prebound file is first created or modified
+ * for other than updating its prebinding information the value of the check sum
+ * is set to zero.  When the file has it prebinding re-done and if the value of
+ * the check sum is zero the original check sum is calculated and stored in
+ * cksum field of this load command in the output file.  If when the prebinding
+ * is re-done and the cksum field is non-zero it is left unchanged from the
+ * input file.
+ */
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct PrebindCksumCommand<E: Endian> {
+    /// LC_PREBIND_CKSUM
+    pub cmd: U32<E>,
+    /// sizeof(struct PrebindCksumCommand)
+    pub cmdsize: U32<E>,
+    /// the check sum or zero
+    pub cksum: U32<E>,
+}
+
+/*
+ * The uuid load command contains a single 128-bit unique random number that
+ * identifies an object produced by the static link editor.
+ */
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct UuidCommand<E: Endian> {
+    /// LC_UUID
+    pub cmd: U32<E>,
+    /// sizeof(struct UuidCommand)
+    pub cmdsize: U32<E>,
+    /// the 128-bit uuid
+    pub uuid: [u8; 16],
+}
+
+/*
+ * The RpathCommand contains a path which at runtime should be added to
+ * the current run path used to find @rpath prefixed dylibs.
+ */
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct RpathCommand<E: Endian> {
+    /// LC_RPATH
+    pub cmd: U32<E>,
+    /// includes string
+    pub cmdsize: U32<E>,
+    /// path to add to run path
+    pub path: LcStr<E>,
+}
+
+/*
+ * The LinkeditDataCommand contains the offsets and sizes of a blob
+ * of data in the __LINKEDIT segment.
+ */
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct LinkeditDataCommand<E: Endian> {
+    /// `LC_CODE_SIGNATURE`, `LC_SEGMENT_SPLIT_INFO`, `LC_FUNCTION_STARTS`,
+    /// `LC_DATA_IN_CODE`, `LC_DYLIB_CODE_SIGN_DRS`, `LC_LINKER_OPTIMIZATION_HINT`,
+    /// `LC_DYLD_EXPORTS_TRIE`, or `LC_DYLD_CHAINED_FIXUPS`.
+    pub cmd: U32<E>,
+    /// sizeof(struct LinkeditDataCommand)
+    pub cmdsize: U32<E>,
+    /// file offset of data in __LINKEDIT segment
+    pub dataoff: U32<E>,
+    /// file size of data in __LINKEDIT segment
+    pub datasize: U32<E>,
+}
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct FilesetEntryCommand<E: Endian> {
+    // LC_FILESET_ENTRY
+    pub cmd: U32<E>,
+    /// includes id string
+    pub cmdsize: U32<E>,
+    /// memory address of the dylib
+    pub vmaddr: U64<E>,
+    /// file offset of the dylib
+    pub fileoff: U64<E>,
+    /// contained entry id
+    pub entry_id: LcStr<E>,
+    /// entry_id is 32-bits long, so this is the reserved padding
+    pub reserved: U32<E>,
+}
+
+/*
+ * The EncryptionInfoCommand32 contains the file offset and size of an
+ * of an encrypted segment.
+ */
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct EncryptionInfoCommand32<E: Endian> {
+    /// LC_ENCRYPTION_INFO
+    pub cmd: U32<E>,
+    /// sizeof(struct EncryptionInfoCommand32)
+    pub cmdsize: U32<E>,
+    /// file offset of encrypted range
+    pub cryptoff: U32<E>,
+    /// file size of encrypted range
+    pub cryptsize: U32<E>,
+    /// which enryption system, 0 means not-encrypted yet
+    pub cryptid: U32<E>,
+}
+
+/*
+ * The EncryptionInfoCommand64 contains the file offset and size of an
+ * of an encrypted segment (for use in x86_64 targets).
+ */
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct EncryptionInfoCommand64<E: Endian> {
+    /// LC_ENCRYPTION_INFO_64
+    pub cmd: U32<E>,
+    /// sizeof(struct EncryptionInfoCommand64)
+    pub cmdsize: U32<E>,
+    /// file offset of encrypted range
+    pub cryptoff: U32<E>,
+    /// file size of encrypted range
+    pub cryptsize: U32<E>,
+    /// which enryption system, 0 means not-encrypted yet
+    pub cryptid: U32<E>,
+    /// padding to make this struct's size a multiple of 8 bytes
+    pub pad: U32<E>,
+}
+
+/*
+ * The VersionMinCommand contains the min OS version on which this
+ * binary was built to run.
+ */
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct VersionMinCommand<E: Endian> {
+    /// LC_VERSION_MIN_MACOSX or LC_VERSION_MIN_IPHONEOS or LC_VERSION_MIN_WATCHOS or LC_VERSION_MIN_TVOS
+    pub cmd: U32<E>,
+    /// sizeof(struct VersionMinCommand)
+    pub cmdsize: U32<E>,
+    /// X.Y.Z is encoded in nibbles xxxx.yy.zz
+    pub version: U32<E>,
+    /// X.Y.Z is encoded in nibbles xxxx.yy.zz
+    pub sdk: U32<E>,
+}
+
+/*
+ * The BuildVersionCommand contains the min OS version on which this
+ * binary was built to run for its platform.  The list of known platforms and
+ * tool values following it.
+ */
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct BuildVersionCommand<E: Endian> {
+    /// LC_BUILD_VERSION
+    pub cmd: U32<E>,
+    /// sizeof(struct BuildVersionCommand) plus ntools * sizeof(struct BuildToolVersion)
+    pub cmdsize: U32<E>,
+    /// platform
+    pub platform: U32<E>,
+    /// X.Y.Z is encoded in nibbles xxxx.yy.zz
+    pub minos: U32<E>,
+    /// X.Y.Z is encoded in nibbles xxxx.yy.zz
+    pub sdk: U32<E>,
+    /// number of tool entries following this
+    pub ntools: U32<E>,
+}
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct BuildToolVersion<E: Endian> {
+    /// enum for the tool
+    pub tool: U32<E>,
+    /// version number of the tool
+    pub version: U32<E>,
+}
+
+/* Known values for the platform field above. */
+pub const PLATFORM_MACOS: u32 = 1;
+pub const PLATFORM_IOS: u32 = 2;
+pub const PLATFORM_TVOS: u32 = 3;
+pub const PLATFORM_WATCHOS: u32 = 4;
+pub const PLATFORM_BRIDGEOS: u32 = 5;
+pub const PLATFORM_MACCATALYST: u32 = 6;
+pub const PLATFORM_IOSSIMULATOR: u32 = 7;
+pub const PLATFORM_TVOSSIMULATOR: u32 = 8;
+pub const PLATFORM_WATCHOSSIMULATOR: u32 = 9;
+pub const PLATFORM_DRIVERKIT: u32 = 10;
+
+/* Known values for the tool field above. */
+pub const TOOL_CLANG: u32 = 1;
+pub const TOOL_SWIFT: u32 = 2;
+pub const TOOL_LD: u32 = 3;
+
+/*
+ * The DyldInfoCommand contains the file offsets and sizes of
+ * the new compressed form of the information dyld needs to
+ * load the image.  This information is used by dyld on Mac OS X
+ * 10.6 and later.  All information pointed to by this command
+ * is encoded using byte streams, so no endian swapping is needed
+ * to interpret it.
+ */
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct DyldInfoCommand<E: Endian> {
+    /// LC_DYLD_INFO or LC_DYLD_INFO_ONLY
+    pub cmd: U32<E>,
+    /// sizeof(struct DyldInfoCommand)
+    pub cmdsize: U32<E>,
+
+    /*
+     * Dyld rebases an image whenever dyld loads it at an address different
+     * from its preferred address.  The rebase information is a stream
+     * of byte sized opcodes whose symbolic names start with REBASE_OPCODE_.
+     * Conceptually the rebase information is a table of tuples:
+     *    <seg-index, seg-offset, type>
+     * The opcodes are a compressed way to encode the table by only
+     * encoding when a column changes.  In addition simple patterns
+     * like "every n'th offset for m times" can be encoded in a few
+     * bytes.
+     */
+    /// file offset to rebase info
+    pub rebase_off: U32<E>,
+    /// size of rebase info
+    pub rebase_size: U32<E>,
+
+    /*
+     * Dyld binds an image during the loading process, if the image
+     * requires any pointers to be initialized to symbols in other images.
+     * The bind information is a stream of byte sized
+     * opcodes whose symbolic names start with BIND_OPCODE_.
+     * Conceptually the bind information is a table of tuples:
+     *    <seg-index, seg-offset, type, symbol-library-ordinal, symbol-name, addend>
+     * The opcodes are a compressed way to encode the table by only
+     * encoding when a column changes.  In addition simple patterns
+     * like for runs of pointers initialzed to the same value can be
+     * encoded in a few bytes.
+     */
+    /// file offset to binding info
+    pub bind_off: U32<E>,
+    /// size of binding info
+    pub bind_size: U32<E>,
+
+    /*
+     * Some C++ programs require dyld to unique symbols so that all
+     * images in the process use the same copy of some code/data.
+     * This step is done after binding. The content of the weak_bind
+     * info is an opcode stream like the bind_info.  But it is sorted
+     * alphabetically by symbol name.  This enable dyld to walk
+     * all images with weak binding information in order and look
+     * for collisions.  If there are no collisions, dyld does
+     * no updating.  That means that some fixups are also encoded
+     * in the bind_info.  For instance, all calls to "operator new"
+     * are first bound to libstdc++.dylib using the information
+     * in bind_info.  Then if some image overrides operator new
+     * that is detected when the weak_bind information is processed
+     * and the call to operator new is then rebound.
+     */
+    /// file offset to weak binding info
+    pub weak_bind_off: U32<E>,
+    /// size of weak binding info
+    pub weak_bind_size: U32<E>,
+
+    /*
+     * Some uses of external symbols do not need to be bound immediately.
+     * Instead they can be lazily bound on first use.  The lazy_bind
+     * are contains a stream of BIND opcodes to bind all lazy symbols.
+     * Normal use is that dyld ignores the lazy_bind section when
+     * loading an image.  Instead the static linker arranged for the
+     * lazy pointer to initially point to a helper function which
+     * pushes the offset into the lazy_bind area for the symbol
+     * needing to be bound, then jumps to dyld which simply adds
+     * the offset to lazy_bind_off to get the information on what
+     * to bind.
+     */
+    /// file offset to lazy binding info
+    pub lazy_bind_off: U32<E>,
+    /// size of lazy binding infs
+    pub lazy_bind_size: U32<E>,
+
+    /*
+     * The symbols exported by a dylib are encoded in a trie.  This
+     * is a compact representation that factors out common prefixes.
+     * It also reduces LINKEDIT pages in RAM because it encodes all
+     * information (name, address, flags) in one small, contiguous range.
+     * The export area is a stream of nodes.  The first node sequentially
+     * is the start node for the trie.
+     *
+     * Nodes for a symbol start with a uleb128 that is the length of
+     * the exported symbol information for the string so far.
+     * If there is no exported symbol, the node starts with a zero byte.
+     * If there is exported info, it follows the length.
+     *
+     * First is a uleb128 containing flags. Normally, it is followed by
+     * a uleb128 encoded offset which is location of the content named
+     * by the symbol from the mach_header for the image.  If the flags
+     * is EXPORT_SYMBOL_FLAGS_REEXPORT, then following the flags is
+     * a uleb128 encoded library ordinal, then a zero terminated
+     * UTF8 string.  If the string is zero length, then the symbol
+     * is re-export from the specified dylib with the same name.
+     * If the flags is EXPORT_SYMBOL_FLAGS_STUB_AND_RESOLVER, then following
+     * the flags is two uleb128s: the stub offset and the resolver offset.
+     * The stub is used by non-lazy pointers.  The resolver is used
+     * by lazy pointers and must be called to get the actual address to use.
+     *
+     * After the optional exported symbol information is a byte of
+     * how many edges (0-255) that this node has leaving it,
+     * followed by each edge.
+     * Each edge is a zero terminated UTF8 of the addition chars
+     * in the symbol, followed by a uleb128 offset for the node that
+     * edge points to.
+     *
+     */
+    /// file offset to lazy binding info
+    pub export_off: U32<E>,
+    /// size of lazy binding infs
+    pub export_size: U32<E>,
+}
+
+/*
+ * The following are used to encode rebasing information
+ */
+pub const REBASE_TYPE_POINTER: u8 = 1;
+pub const REBASE_TYPE_TEXT_ABSOLUTE32: u8 = 2;
+pub const REBASE_TYPE_TEXT_PCREL32: u8 = 3;
+
+pub const REBASE_OPCODE_MASK: u8 = 0xF0;
+pub const REBASE_IMMEDIATE_MASK: u8 = 0x0F;
+pub const REBASE_OPCODE_DONE: u8 = 0x00;
+pub const REBASE_OPCODE_SET_TYPE_IMM: u8 = 0x10;
+pub const REBASE_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB: u8 = 0x20;
+pub const REBASE_OPCODE_ADD_ADDR_ULEB: u8 = 0x30;
+pub const REBASE_OPCODE_ADD_ADDR_IMM_SCALED: u8 = 0x40;
+pub const REBASE_OPCODE_DO_REBASE_IMM_TIMES: u8 = 0x50;
+pub const REBASE_OPCODE_DO_REBASE_ULEB_TIMES: u8 = 0x60;
+pub const REBASE_OPCODE_DO_REBASE_ADD_ADDR_ULEB: u8 = 0x70;
+pub const REBASE_OPCODE_DO_REBASE_ULEB_TIMES_SKIPPING_ULEB: u8 = 0x80;
+
+/*
+ * The following are used to encode binding information
+ */
+pub const BIND_TYPE_POINTER: u8 = 1;
+pub const BIND_TYPE_TEXT_ABSOLUTE32: u8 = 2;
+pub const BIND_TYPE_TEXT_PCREL32: u8 = 3;
+
+pub const BIND_SPECIAL_DYLIB_SELF: i8 = 0;
+pub const BIND_SPECIAL_DYLIB_MAIN_EXECUTABLE: i8 = -1;
+pub const BIND_SPECIAL_DYLIB_FLAT_LOOKUP: i8 = -2;
+pub const BIND_SPECIAL_DYLIB_WEAK_LOOKUP: i8 = -3;
+
+pub const BIND_SYMBOL_FLAGS_WEAK_IMPORT: u8 = 0x1;
+pub const BIND_SYMBOL_FLAGS_NON_WEAK_DEFINITION: u8 = 0x8;
+
+pub const BIND_OPCODE_MASK: u8 = 0xF0;
+pub const BIND_IMMEDIATE_MASK: u8 = 0x0F;
+pub const BIND_OPCODE_DONE: u8 = 0x00;
+pub const BIND_OPCODE_SET_DYLIB_ORDINAL_IMM: u8 = 0x10;
+pub const BIND_OPCODE_SET_DYLIB_ORDINAL_ULEB: u8 = 0x20;
+pub const BIND_OPCODE_SET_DYLIB_SPECIAL_IMM: u8 = 0x30;
+pub const BIND_OPCODE_SET_SYMBOL_TRAILING_FLAGS_IMM: u8 = 0x40;
+pub const BIND_OPCODE_SET_TYPE_IMM: u8 = 0x50;
+pub const BIND_OPCODE_SET_ADDEND_SLEB: u8 = 0x60;
+pub const BIND_OPCODE_SET_SEGMENT_AND_OFFSET_ULEB: u8 = 0x70;
+pub const BIND_OPCODE_ADD_ADDR_ULEB: u8 = 0x80;
+pub const BIND_OPCODE_DO_BIND: u8 = 0x90;
+pub const BIND_OPCODE_DO_BIND_ADD_ADDR_ULEB: u8 = 0xA0;
+pub const BIND_OPCODE_DO_BIND_ADD_ADDR_IMM_SCALED: u8 = 0xB0;
+pub const BIND_OPCODE_DO_BIND_ULEB_TIMES_SKIPPING_ULEB: u8 = 0xC0;
+pub const BIND_OPCODE_THREADED: u8 = 0xD0;
+pub const BIND_SUBOPCODE_THREADED_SET_BIND_ORDINAL_TABLE_SIZE_ULEB: u8 = 0x00;
+pub const BIND_SUBOPCODE_THREADED_APPLY: u8 = 0x01;
+
+/*
+ * The following are used on the flags byte of a terminal node
+ * in the export information.
+ */
+pub const EXPORT_SYMBOL_FLAGS_KIND_MASK: u32 = 0x03;
+pub const EXPORT_SYMBOL_FLAGS_KIND_REGULAR: u32 = 0x00;
+pub const EXPORT_SYMBOL_FLAGS_KIND_THREAD_LOCAL: u32 = 0x01;
+pub const EXPORT_SYMBOL_FLAGS_KIND_ABSOLUTE: u32 = 0x02;
+pub const EXPORT_SYMBOL_FLAGS_WEAK_DEFINITION: u32 = 0x04;
+pub const EXPORT_SYMBOL_FLAGS_REEXPORT: u32 = 0x08;
+pub const EXPORT_SYMBOL_FLAGS_STUB_AND_RESOLVER: u32 = 0x10;
+
+/*
+ * The LinkerOptionCommand contains linker options embedded in object files.
+ */
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct LinkerOptionCommand<E: Endian> {
+    /// LC_LINKER_OPTION only used in MH_OBJECT filetypes
+    pub cmd: U32<E>,
+    pub cmdsize: U32<E>,
+    /// number of strings
+    pub count: U32<E>,
+    /* concatenation of zero terminated UTF8 strings.
+    Zero filled at end to align */
+}
+
+/*
+ * The SymsegCommand contains the offset and size of the GNU style
+ * symbol table information as described in the header file <symseg.h>.
+ * The symbol roots of the symbol segments must also be aligned properly
+ * in the file.  So the requirement of keeping the offsets aligned to a
+ * multiple of a 4 bytes translates to the length field of the symbol
+ * roots also being a multiple of a long.  Also the padding must again be
+ * zeroed. (THIS IS OBSOLETE and no longer supported).
+ */
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct SymsegCommand<E: Endian> {
+    /// LC_SYMSEG
+    pub cmd: U32<E>,
+    /// sizeof(struct SymsegCommand)
+    pub cmdsize: U32<E>,
+    /// symbol segment offset
+    pub offset: U32<E>,
+    /// symbol segment size in bytes
+    pub size: U32<E>,
+}
+
+/*
+ * The IdentCommand contains a free format string table following the
+ * IdentCommand structure.  The strings are null terminated and the size of
+ * the command is padded out with zero bytes to a multiple of 4 bytes/
+ * (THIS IS OBSOLETE and no longer supported).
+ */
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct IdentCommand<E: Endian> {
+    /// LC_IDENT
+    pub cmd: U32<E>,
+    /// strings that follow this command
+    pub cmdsize: U32<E>,
+}
+
+/*
+ * The FvmfileCommand contains a reference to a file to be loaded at the
+ * specified virtual address.  (Presently, this command is reserved for
+ * internal use.  The kernel ignores this command when loading a program into
+ * memory).
+ */
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct FvmfileCommand<E: Endian> {
+    /// LC_FVMFILE
+    pub cmd: U32<E>,
+    /// includes pathname string
+    pub cmdsize: U32<E>,
+    /// files pathname
+    pub name: LcStr<E>,
+    /// files virtual address
+    pub header_addr: U32<E>,
+}
+
+/*
+ * The EntryPointCommand is a replacement for thread_command.
+ * It is used for main executables to specify the location (file offset)
+ * of main().  If -stack_size was used at link time, the stacksize
+ * field will contain the stack size need for the main thread.
+ */
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct EntryPointCommand<E: Endian> {
+    /// LC_MAIN only used in MH_EXECUTE filetypes
+    pub cmd: U32<E>,
+    /// 24
+    pub cmdsize: U32<E>,
+    /// file (__TEXT) offset of main()
+    pub entryoff: U64<E>,
+    /// if not zero, initial stack size
+    pub stacksize: U64<E>,
+}
+
+/*
+ * The SourceVersionCommand is an optional load command containing
+ * the version of the sources used to build the binary.
+ */
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct SourceVersionCommand<E: Endian> {
+    /// LC_SOURCE_VERSION
+    pub cmd: U32<E>,
+    /// 16
+    pub cmdsize: U32<E>,
+    /// A.B.C.D.E packed as a24.b10.c10.d10.e10
+    pub version: U64<E>,
+}
+
+/*
+ * The LC_DATA_IN_CODE load commands uses a LinkeditDataCommand
+ * to point to an array of DataInCodeEntry entries. Each entry
+ * describes a range of data in a code section.
+ */
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct DataInCodeEntry<E: Endian> {
+    /// from mach_header to start of data range
+    pub offset: U32<E>,
+    /// number of bytes in data range
+    pub length: U16<E>,
+    /// a DICE_KIND_* value
+    pub kind: U16<E>,
+}
+pub const DICE_KIND_DATA: u32 = 0x0001;
+pub const DICE_KIND_JUMP_TABLE8: u32 = 0x0002;
+pub const DICE_KIND_JUMP_TABLE16: u32 = 0x0003;
+pub const DICE_KIND_JUMP_TABLE32: u32 = 0x0004;
+pub const DICE_KIND_ABS_JUMP_TABLE32: u32 = 0x0005;
+
+/*
+ * Sections of type S_THREAD_LOCAL_VARIABLES contain an array
+ * of TlvDescriptor structures.
+ */
+/* TODO:
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct TlvDescriptor<E: Endian>
+{
+    void*		(*thunk)(struct TlvDescriptor*);
+    unsigned long	key;
+    unsigned long	offset;
+}
+*/
+
+/*
+ * LC_NOTE commands describe a region of arbitrary data included in a Mach-O
+ * file.  Its initial use is to record extra data in MH_CORE files.
+ */
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct NoteCommand<E: Endian> {
+    /// LC_NOTE
+    pub cmd: U32<E>,
+    /// sizeof(struct NoteCommand)
+    pub cmdsize: U32<E>,
+    /// owner name for this LC_NOTE
+    pub data_owner: [u8; 16],
+    /// file offset of this data
+    pub offset: U64<E>,
+    /// length of data region
+    pub size: U64<E>,
+}
+
+// Definitions from "/usr/include/mach-o/nlist.h".
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct Nlist32<E: Endian> {
+    /// index into the string table
+    pub n_strx: U32<E>,
+    /// type flag, see below
+    pub n_type: u8,
+    /// section number or NO_SECT
+    pub n_sect: u8,
+    /// see <mach-o/stab.h>
+    pub n_desc: U16<E>,
+    /// value of this symbol (or stab offset)
+    pub n_value: U32<E>,
+}
+
+/*
+ * This is the symbol table entry structure for 64-bit architectures.
+ */
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct Nlist64<E: Endian> {
+    /// index into the string table
+    pub n_strx: U32<E>,
+    /// type flag, see below
+    pub n_type: u8,
+    /// section number or NO_SECT
+    pub n_sect: u8,
+    /// see <mach-o/stab.h>
+    pub n_desc: U16<E>,
+    /// value of this symbol (or stab offset)
+    // Note: 4 byte alignment has been observed in practice.
+    pub n_value: U64Bytes<E>,
+}
+
+/*
+ * Symbols with a index into the string table of zero (n_un.n_strx == 0) are
+ * defined to have a null, "", name.  Therefore all string indexes to non null
+ * names must not have a zero string index.  This is bit historical information
+ * that has never been well documented.
+ */
+
+/*
+ * The n_type field really contains four fields:
+ *	unsigned char N_STAB:3,
+ *		      N_PEXT:1,
+ *		      N_TYPE:3,
+ *		      N_EXT:1;
+ * which are used via the following masks.
+ */
+/// if any of these bits set, a symbolic debugging entry
+pub const N_STAB: u8 = 0xe0;
+/// private external symbol bit
+pub const N_PEXT: u8 = 0x10;
+/// mask for the type bits
+pub const N_TYPE: u8 = 0x0e;
+/// external symbol bit, set for external symbols
+pub const N_EXT: u8 = 0x01;
+
+/*
+ * Only symbolic debugging entries have some of the N_STAB bits set and if any
+ * of these bits are set then it is a symbolic debugging entry (a stab).  In
+ * which case then the values of the n_type field (the entire field) are given
+ * in <mach-o/stab.h>
+ */
+
+/*
+ * Values for N_TYPE bits of the n_type field.
+ */
+/// undefined, n_sect == NO_SECT
+pub const N_UNDF: u8 = 0x0;
+/// absolute, n_sect == NO_SECT
+pub const N_ABS: u8 = 0x2;
+/// defined in section number n_sect
+pub const N_SECT: u8 = 0xe;
+/// prebound undefined (defined in a dylib)
+pub const N_PBUD: u8 = 0xc;
+/// indirect
+pub const N_INDR: u8 = 0xa;
+
+/*
+ * If the type is N_INDR then the symbol is defined to be the same as another
+ * symbol.  In this case the n_value field is an index into the string table
+ * of the other symbol's name.  When the other symbol is defined then they both
+ * take on the defined type and value.
+ */
+
+/*
+ * If the type is N_SECT then the n_sect field contains an ordinal of the
+ * section the symbol is defined in.  The sections are numbered from 1 and
+ * refer to sections in order they appear in the load commands for the file
+ * they are in.  This means the same ordinal may very well refer to different
+ * sections in different files.
+ *
+ * The n_value field for all symbol table entries (including N_STAB's) gets
+ * updated by the link editor based on the value of it's n_sect field and where
+ * the section n_sect references gets relocated.  If the value of the n_sect
+ * field is NO_SECT then it's n_value field is not changed by the link editor.
+ */
+/// symbol is not in any section
+pub const NO_SECT: u8 = 0;
+/// 1 thru 255 inclusive
+pub const MAX_SECT: u8 = 255;
+
+/*
+ * Common symbols are represented by undefined (N_UNDF) external (N_EXT) types
+ * who's values (n_value) are non-zero.  In which case the value of the n_value
+ * field is the size (in bytes) of the common symbol.  The n_sect field is set
+ * to NO_SECT.  The alignment of a common symbol may be set as a power of 2
+ * between 2^1 and 2^15 as part of the n_desc field using the macros below. If
+ * the alignment is not set (a value of zero) then natural alignment based on
+ * the size is used.
+ */
+/* TODO:
+#define GET_COMM_ALIGN(n_desc) (((n_desc) >> 8) & 0x0f)
+#define SET_COMM_ALIGN(n_desc,align) \
+    (n_desc) = (((n_desc) & 0xf0ff) | (((align) & 0x0f) << 8))
+ */
+
+/*
+ * To support the lazy binding of undefined symbols in the dynamic link-editor,
+ * the undefined symbols in the symbol table (the nlist structures) are marked
+ * with the indication if the undefined reference is a lazy reference or
+ * non-lazy reference.  If both a non-lazy reference and a lazy reference is
+ * made to the same symbol the non-lazy reference takes precedence.  A reference
+ * is lazy only when all references to that symbol are made through a symbol
+ * pointer in a lazy symbol pointer section.
+ *
+ * The implementation of marking nlist structures in the symbol table for
+ * undefined symbols will be to use some of the bits of the n_desc field as a
+ * reference type.  The mask REFERENCE_TYPE will be applied to the n_desc field
+ * of an nlist structure for an undefined symbol to determine the type of
+ * undefined reference (lazy or non-lazy).
+ *
+ * The constants for the REFERENCE FLAGS are propagated to the reference table
+ * in a shared library file.  In that case the constant for a defined symbol,
+ * REFERENCE_FLAG_DEFINED, is also used.
+ */
+/* Reference type bits of the n_desc field of undefined symbols */
+pub const REFERENCE_TYPE: u16 = 0x7;
+/* types of references */
+pub const REFERENCE_FLAG_UNDEFINED_NON_LAZY: u16 = 0;
+pub const REFERENCE_FLAG_UNDEFINED_LAZY: u16 = 1;
+pub const REFERENCE_FLAG_DEFINED: u16 = 2;
+pub const REFERENCE_FLAG_PRIVATE_DEFINED: u16 = 3;
+pub const REFERENCE_FLAG_PRIVATE_UNDEFINED_NON_LAZY: u16 = 4;
+pub const REFERENCE_FLAG_PRIVATE_UNDEFINED_LAZY: u16 = 5;
+
+/*
+ * To simplify stripping of objects that use are used with the dynamic link
+ * editor, the static link editor marks the symbols defined an object that are
+ * referenced by a dynamicly bound object (dynamic shared libraries, bundles).
+ * With this marking strip knows not to strip these symbols.
+ */
+pub const REFERENCED_DYNAMICALLY: u16 = 0x0010;
+
+/*
+ * For images created by the static link editor with the -twolevel_namespace
+ * option in effect the flags field of the mach header is marked with
+ * MH_TWOLEVEL.  And the binding of the undefined references of the image are
+ * determined by the static link editor.  Which library an undefined symbol is
+ * bound to is recorded by the static linker in the high 8 bits of the n_desc
+ * field using the SET_LIBRARY_ORDINAL macro below.  The ordinal recorded
+ * references the libraries listed in the Mach-O's LC_LOAD_DYLIB,
+ * LC_LOAD_WEAK_DYLIB, LC_REEXPORT_DYLIB, LC_LOAD_UPWARD_DYLIB, and
+ * LC_LAZY_LOAD_DYLIB, etc. load commands in the order they appear in the
+ * headers.   The library ordinals start from 1.
+ * For a dynamic library that is built as a two-level namespace image the
+ * undefined references from module defined in another use the same nlist struct
+ * an in that case SELF_LIBRARY_ORDINAL is used as the library ordinal.  For
+ * defined symbols in all images they also must have the library ordinal set to
+ * SELF_LIBRARY_ORDINAL.  The EXECUTABLE_ORDINAL refers to the executable
+ * image for references from plugins that refer to the executable that loads
+ * them.
+ *
+ * The DYNAMIC_LOOKUP_ORDINAL is for undefined symbols in a two-level namespace
+ * image that are looked up by the dynamic linker with flat namespace semantics.
+ * This ordinal was added as a feature in Mac OS X 10.3 by reducing the
+ * value of MAX_LIBRARY_ORDINAL by one.  So it is legal for existing binaries
+ * or binaries built with older tools to have 0xfe (254) dynamic libraries.  In
+ * this case the ordinal value 0xfe (254) must be treated as a library ordinal
+ * for compatibility.
+ */
+/* TODO:
+#define GET_LIBRARY_ORDINAL(n_desc) (((n_desc) >> 8) & 0xff)
+#define SET_LIBRARY_ORDINAL(n_desc,ordinal) \
+    (n_desc) = (((n_desc) & 0x00ff) | (((ordinal) & 0xff) << 8))
+ */
+pub const SELF_LIBRARY_ORDINAL: u8 = 0x0;
+pub const MAX_LIBRARY_ORDINAL: u8 = 0xfd;
+pub const DYNAMIC_LOOKUP_ORDINAL: u8 = 0xfe;
+pub const EXECUTABLE_ORDINAL: u8 = 0xff;
+
+/*
+ * The bit 0x0020 of the n_desc field is used for two non-overlapping purposes
+ * and has two different symbolic names, N_NO_DEAD_STRIP and N_DESC_DISCARDED.
+ */
+
+/*
+ * The N_NO_DEAD_STRIP bit of the n_desc field only ever appears in a
+ * relocatable .o file (MH_OBJECT filetype). And is used to indicate to the
+ * static link editor it is never to dead strip the symbol.
+ */
+/// symbol is not to be dead stripped
+pub const N_NO_DEAD_STRIP: u16 = 0x0020;
+
+/*
+ * The N_DESC_DISCARDED bit of the n_desc field never appears in linked image.
+ * But is used in very rare cases by the dynamic link editor to mark an in
+ * memory symbol as discared and longer used for linking.
+ */
+/// symbol is discarded
+pub const N_DESC_DISCARDED: u16 = 0x0020;
+
+/*
+ * The N_WEAK_REF bit of the n_desc field indicates to the dynamic linker that
+ * the undefined symbol is allowed to be missing and is to have the address of
+ * zero when missing.
+ */
+/// symbol is weak referenced
+pub const N_WEAK_REF: u16 = 0x0040;
+
+/*
+ * The N_WEAK_DEF bit of the n_desc field indicates to the static and dynamic
+ * linkers that the symbol definition is weak, allowing a non-weak symbol to
+ * also be used which causes the weak definition to be discared.  Currently this
+ * is only supported for symbols in coalesed sections.
+ */
+/// coalesed symbol is a weak definition
+pub const N_WEAK_DEF: u16 = 0x0080;
+
+/*
+ * The N_REF_TO_WEAK bit of the n_desc field indicates to the dynamic linker
+ * that the undefined symbol should be resolved using flat namespace searching.
+ */
+/// reference to a weak symbol
+pub const N_REF_TO_WEAK: u16 = 0x0080;
+
+/*
+ * The N_ARM_THUMB_DEF bit of the n_desc field indicates that the symbol is
+ * a defintion of a Thumb function.
+ */
+/// symbol is a Thumb function (ARM)
+pub const N_ARM_THUMB_DEF: u16 = 0x0008;
+
+/*
+ * The N_SYMBOL_RESOLVER bit of the n_desc field indicates that the
+ * that the function is actually a resolver function and should
+ * be called to get the address of the real function to use.
+ * This bit is only available in .o files (MH_OBJECT filetype)
+ */
+pub const N_SYMBOL_RESOLVER: u16 = 0x0100;
+
+/*
+ * The N_ALT_ENTRY bit of the n_desc field indicates that the
+ * symbol is pinned to the previous content.
+ */
+pub const N_ALT_ENTRY: u16 = 0x0200;
+
+// Definitions from "/usr/include/mach-o/stab.h".
+
+/*
+ * This file gives definitions supplementing <nlist.h> for permanent symbol
+ * table entries of Mach-O files.  Modified from the BSD definitions.  The
+ * modifications from the original definitions were changing what the values of
+ * what was the n_other field (an unused field) which is now the n_sect field.
+ * These modifications are required to support symbols in an arbitrary number of
+ * sections not just the three sections (text, data and bss) in a BSD file.
+ * The values of the defined constants have NOT been changed.
+ *
+ * These must have one of the N_STAB bits on.  The n_value fields are subject
+ * to relocation according to the value of their n_sect field.  So for types
+ * that refer to things in sections the n_sect field must be filled in with the
+ * proper section ordinal.  For types that are not to have their n_value field
+ * relocatated the n_sect field must be NO_SECT.
+ */
+
+/*
+ * Symbolic debugger symbols.  The comments give the conventional use for
+ *
+ * 	.stabs "n_name", n_type, n_sect, n_desc, n_value
+ *
+ * where n_type is the defined constant and not listed in the comment.  Other
+ * fields not listed are zero. n_sect is the section ordinal the entry is
+ * refering to.
+ */
+/// global symbol: name,,NO_SECT,type,0
+pub const N_GSYM: u8 = 0x20;
+/// procedure name (f77 kludge): name,,NO_SECT,0,0
+pub const N_FNAME: u8 = 0x22;
+/// procedure: name,,n_sect,linenumber,address
+pub const N_FUN: u8 = 0x24;
+/// static symbol: name,,n_sect,type,address
+pub const N_STSYM: u8 = 0x26;
+/// .lcomm symbol: name,,n_sect,type,address
+pub const N_LCSYM: u8 = 0x28;
+/// begin nsect sym: 0,,n_sect,0,address
+pub const N_BNSYM: u8 = 0x2e;
+/// AST file path: name,,NO_SECT,0,0
+pub const N_AST: u8 = 0x32;
+/// emitted with gcc2_compiled and in gcc source
+pub const N_OPT: u8 = 0x3c;
+/// register sym: name,,NO_SECT,type,register
+pub const N_RSYM: u8 = 0x40;
+/// src line: 0,,n_sect,linenumber,address
+pub const N_SLINE: u8 = 0x44;
+/// end nsect sym: 0,,n_sect,0,address
+pub const N_ENSYM: u8 = 0x4e;
+/// structure elt: name,,NO_SECT,type,struct_offset
+pub const N_SSYM: u8 = 0x60;
+/// source file name: name,,n_sect,0,address
+pub const N_SO: u8 = 0x64;
+/// object file name: name,,0,0,st_mtime
+pub const N_OSO: u8 = 0x66;
+/// local sym: name,,NO_SECT,type,offset
+pub const N_LSYM: u8 = 0x80;
+/// include file beginning: name,,NO_SECT,0,sum
+pub const N_BINCL: u8 = 0x82;
+/// #included file name: name,,n_sect,0,address
+pub const N_SOL: u8 = 0x84;
+/// compiler parameters: name,,NO_SECT,0,0
+pub const N_PARAMS: u8 = 0x86;
+/// compiler version: name,,NO_SECT,0,0
+pub const N_VERSION: u8 = 0x88;
+/// compiler -O level: name,,NO_SECT,0,0
+pub const N_OLEVEL: u8 = 0x8A;
+/// parameter: name,,NO_SECT,type,offset
+pub const N_PSYM: u8 = 0xa0;
+/// include file end: name,,NO_SECT,0,0
+pub const N_EINCL: u8 = 0xa2;
+/// alternate entry: name,,n_sect,linenumber,address
+pub const N_ENTRY: u8 = 0xa4;
+/// left bracket: 0,,NO_SECT,nesting level,address
+pub const N_LBRAC: u8 = 0xc0;
+/// deleted include file: name,,NO_SECT,0,sum
+pub const N_EXCL: u8 = 0xc2;
+/// right bracket: 0,,NO_SECT,nesting level,address
+pub const N_RBRAC: u8 = 0xe0;
+/// begin common: name,,NO_SECT,0,0
+pub const N_BCOMM: u8 = 0xe2;
+/// end common: name,,n_sect,0,0
+pub const N_ECOMM: u8 = 0xe4;
+/// end common (local name): 0,,n_sect,0,address
+pub const N_ECOML: u8 = 0xe8;
+/// second stab entry with length information
+pub const N_LENG: u8 = 0xfe;
+
+/*
+ * for the berkeley pascal compiler, pc(1):
+ */
+/// global pascal symbol: name,,NO_SECT,subtype,line
+pub const N_PC: u8 = 0x30;
+
+// Definitions from "/usr/include/mach-o/reloc.h".
+
+/// A relocation entry.
+///
+/// Mach-O relocations have plain and scattered variants, with the
+/// meaning of the fields depending on the variant.
+///
+/// This type provides functions for determining whether the relocation
+/// is scattered, and for accessing the fields of each variant.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct Relocation<E: Endian> {
+    pub r_word0: U32<E>,
+    pub r_word1: U32<E>,
+}
+
+impl<E: Endian> Relocation<E> {
+    /// Determine whether this is a scattered relocation.
+    #[inline]
+    pub fn r_scattered(self, endian: E, cputype: u32) -> bool {
+        if cputype == CPU_TYPE_X86_64 {
+            false
+        } else {
+            self.r_word0.get(endian) & R_SCATTERED != 0
+        }
+    }
+
+    /// Return the fields of a plain relocation.
+    pub fn info(self, endian: E) -> RelocationInfo {
+        let r_address = self.r_word0.get(endian);
+        let r_word1 = self.r_word1.get(endian);
+        if endian.is_little_endian() {
+            RelocationInfo {
+                r_address,
+                r_symbolnum: r_word1 & 0x00ff_ffff,
+                r_pcrel: ((r_word1 >> 24) & 0x1) != 0,
+                r_length: ((r_word1 >> 25) & 0x3) as u8,
+                r_extern: ((r_word1 >> 27) & 0x1) != 0,
+                r_type: (r_word1 >> 28) as u8,
+            }
+        } else {
+            RelocationInfo {
+                r_address,
+                r_symbolnum: r_word1 >> 8,
+                r_pcrel: ((r_word1 >> 7) & 0x1) != 0,
+                r_length: ((r_word1 >> 5) & 0x3) as u8,
+                r_extern: ((r_word1 >> 4) & 0x1) != 0,
+                r_type: (r_word1 & 0xf) as u8,
+            }
+        }
+    }
+
+    /// Return the fields of a scattered relocation.
+    pub fn scattered_info(self, endian: E) -> ScatteredRelocationInfo {
+        let r_word0 = self.r_word0.get(endian);
+        let r_value = self.r_word1.get(endian);
+        ScatteredRelocationInfo {
+            r_address: r_word0 & 0x00ff_ffff,
+            r_type: ((r_word0 >> 24) & 0xf) as u8,
+            r_length: ((r_word0 >> 28) & 0x3) as u8,
+            r_pcrel: ((r_word0 >> 30) & 0x1) != 0,
+            r_value,
+        }
+    }
+}
+
+/*
+ * Format of a relocation entry of a Mach-O file.  Modified from the 4.3BSD
+ * format.  The modifications from the original format were changing the value
+ * of the r_symbolnum field for "local" (r_extern == 0) relocation entries.
+ * This modification is required to support symbols in an arbitrary number of
+ * sections not just the three sections (text, data and bss) in a 4.3BSD file.
+ * Also the last 4 bits have had the r_type tag added to them.
+ */
+
+#[derive(Debug, Clone, Copy)]
+pub struct RelocationInfo {
+    /// offset in the section to what is being relocated
+    pub r_address: u32,
+    /// symbol index if r_extern == 1 or section ordinal if r_extern == 0
+    pub r_symbolnum: u32,
+    /// was relocated pc relative already
+    pub r_pcrel: bool,
+    /// 0=byte, 1=word, 2=long, 3=quad
+    pub r_length: u8,
+    /// does not include value of sym referenced
+    pub r_extern: bool,
+    /// if not 0, machine specific relocation type
+    pub r_type: u8,
+}
+
+impl RelocationInfo {
+    /// Combine the fields into a `Relocation`.
+    pub fn relocation<E: Endian>(self, endian: E) -> Relocation<E> {
+        let r_word0 = U32::new(endian, self.r_address);
+        let r_word1 = U32::new(
+            endian,
+            if endian.is_little_endian() {
+                self.r_symbolnum & 0x00ff_ffff
+                    | u32::from(self.r_pcrel) << 24
+                    | u32::from(self.r_length & 0x3) << 25
+                    | u32::from(self.r_extern) << 27
+                    | u32::from(self.r_type) << 28
+            } else {
+                self.r_symbolnum >> 8
+                    | u32::from(self.r_pcrel) << 7
+                    | u32::from(self.r_length & 0x3) << 5
+                    | u32::from(self.r_extern) << 4
+                    | u32::from(self.r_type) & 0xf
+            },
+        );
+        Relocation { r_word0, r_word1 }
+    }
+}
+
+/// absolute relocation type for Mach-O files
+pub const R_ABS: u8 = 0;
+
+/*
+ * The r_address is not really the address as it's name indicates but an offset.
+ * In 4.3BSD a.out objects this offset is from the start of the "segment" for
+ * which relocation entry is for (text or data).  For Mach-O object files it is
+ * also an offset but from the start of the "section" for which the relocation
+ * entry is for.  See comments in <mach-o/loader.h> about the r_address feild
+ * in images for used with the dynamic linker.
+ *
+ * In 4.3BSD a.out objects if r_extern is zero then r_symbolnum is an ordinal
+ * for the segment the symbol being relocated is in.  These ordinals are the
+ * symbol types N_TEXT, N_DATA, N_BSS or N_ABS.  In Mach-O object files these
+ * ordinals refer to the sections in the object file in the order their section
+ * structures appear in the headers of the object file they are in.  The first
+ * section has the ordinal 1, the second 2, and so on.  This means that the
+ * same ordinal in two different object files could refer to two different
+ * sections.  And further could have still different ordinals when combined
+ * by the link-editor.  The value R_ABS is used for relocation entries for
+ * absolute symbols which need no further relocation.
+ */
+
+/*
+ * For RISC machines some of the references are split across two instructions
+ * and the instruction does not contain the complete value of the reference.
+ * In these cases a second, or paired relocation entry, follows each of these
+ * relocation entries, using a PAIR r_type, which contains the other part of the
+ * reference not contained in the instruction.  This other part is stored in the
+ * pair's r_address field.  The exact number of bits of the other part of the
+ * reference store in the r_address field is dependent on the particular
+ * relocation type for the particular architecture.
+ */
+
+/*
+ * To make scattered loading by the link editor work correctly "local"
+ * relocation entries can't be used when the item to be relocated is the value
+ * of a symbol plus an offset (where the resulting expresion is outside the
+ * block the link editor is moving, a blocks are divided at symbol addresses).
+ * In this case. where the item is a symbol value plus offset, the link editor
+ * needs to know more than just the section the symbol was defined.  What is
+ * needed is the actual value of the symbol without the offset so it can do the
+ * relocation correctly based on where the value of the symbol got relocated to
+ * not the value of the expression (with the offset added to the symbol value).
+ * So for the NeXT 2.0 release no "local" relocation entries are ever used when
+ * there is a non-zero offset added to a symbol.  The "external" and "local"
+ * relocation entries remain unchanged.
+ *
+ * The implemention is quite messy given the compatibility with the existing
+ * relocation entry format.  The ASSUMPTION is that a section will never be
+ * bigger than 2**24 - 1 (0x00ffffff or 16,777,215) bytes.  This assumption
+ * allows the r_address (which is really an offset) to fit in 24 bits and high
+ * bit of the r_address field in the relocation_info structure to indicate
+ * it is really a scattered_relocation_info structure.  Since these are only
+ * used in places where "local" relocation entries are used and not where
+ * "external" relocation entries are used the r_extern field has been removed.
+ *
+ * For scattered loading to work on a RISC machine where some of the references
+ * are split across two instructions the link editor needs to be assured that
+ * each reference has a unique 32 bit reference (that more than one reference is
+ * NOT sharing the same high 16 bits for example) so it move each referenced
+ * item independent of each other.  Some compilers guarantees this but the
+ * compilers don't so scattered loading can be done on those that do guarantee
+ * this.
+ */
+
+/// Bit set in `Relocation::r_word0` for scattered relocations.
+pub const R_SCATTERED: u32 = 0x8000_0000;
+
+#[derive(Debug, Clone, Copy)]
+pub struct ScatteredRelocationInfo {
+    /// offset in the section to what is being relocated
+    pub r_address: u32,
+    /// if not 0, machine specific relocation type
+    pub r_type: u8,
+    /// 0=byte, 1=word, 2=long, 3=quad
+    pub r_length: u8,
+    /// was relocated pc relative already
+    pub r_pcrel: bool,
+    /// the value the item to be relocated is refering to (without any offset added)
+    pub r_value: u32,
+}
+
+impl ScatteredRelocationInfo {
+    /// Combine the fields into a `Relocation`.
+    pub fn relocation<E: Endian>(self, endian: E) -> Relocation<E> {
+        let r_word0 = U32::new(
+            endian,
+            self.r_address & 0x00ff_ffff
+                | u32::from(self.r_type & 0xf) << 24
+                | u32::from(self.r_length & 0x3) << 28
+                | u32::from(self.r_pcrel) << 30
+                | R_SCATTERED,
+        );
+        let r_word1 = U32::new(endian, self.r_value);
+        Relocation { r_word0, r_word1 }
+    }
+}
+
+/*
+ * Relocation types used in a generic implementation.  Relocation entries for
+ * normal things use the generic relocation as discribed above and their r_type
+ * is GENERIC_RELOC_VANILLA (a value of zero).
+ *
+ * Another type of generic relocation, GENERIC_RELOC_SECTDIFF, is to support
+ * the difference of two symbols defined in different sections.  That is the
+ * expression "symbol1 - symbol2 + constant" is a relocatable expression when
+ * both symbols are defined in some section.  For this type of relocation the
+ * both relocations entries are scattered relocation entries.  The value of
+ * symbol1 is stored in the first relocation entry's r_value field and the
+ * value of symbol2 is stored in the pair's r_value field.
+ *
+ * A special case for a prebound lazy pointer is needed to beable to set the
+ * value of the lazy pointer back to its non-prebound state.  This is done
+ * using the GENERIC_RELOC_PB_LA_PTR r_type.  This is a scattered relocation
+ * entry where the r_value feild is the value of the lazy pointer not prebound.
+ */
+/// generic relocation as discribed above
+pub const GENERIC_RELOC_VANILLA: u8 = 0;
+/// Only follows a GENERIC_RELOC_SECTDIFF
+pub const GENERIC_RELOC_PAIR: u8 = 1;
+pub const GENERIC_RELOC_SECTDIFF: u8 = 2;
+/// prebound lazy pointer
+pub const GENERIC_RELOC_PB_LA_PTR: u8 = 3;
+pub const GENERIC_RELOC_LOCAL_SECTDIFF: u8 = 4;
+/// thread local variables
+pub const GENERIC_RELOC_TLV: u8 = 5;
+
+// Definitions from "/usr/include/mach-o/arm/reloc.h".
+
+/*
+ * Relocation types used in the arm implementation.  Relocation entries for
+ * things other than instructions use the same generic relocation as discribed
+ * in <mach-o/reloc.h> and their r_type is ARM_RELOC_VANILLA, one of the
+ * *_SECTDIFF or the *_PB_LA_PTR types.  The rest of the relocation types are
+ * for instructions.  Since they are for instructions the r_address field
+ * indicates the 32 bit instruction that the relocation is to be preformed on.
+ */
+/// generic relocation as discribed above
+pub const ARM_RELOC_VANILLA: u8 = 0;
+/// the second relocation entry of a pair
+pub const ARM_RELOC_PAIR: u8 = 1;
+/// a PAIR follows with subtract symbol value
+pub const ARM_RELOC_SECTDIFF: u8 = 2;
+/// like ARM_RELOC_SECTDIFF, but the symbol referenced was local.
+pub const ARM_RELOC_LOCAL_SECTDIFF: u8 = 3;
+/// prebound lazy pointer
+pub const ARM_RELOC_PB_LA_PTR: u8 = 4;
+/// 24 bit branch displacement (to a word address)
+pub const ARM_RELOC_BR24: u8 = 5;
+/// 22 bit branch displacement (to a half-word address)
+pub const ARM_THUMB_RELOC_BR22: u8 = 6;
+/// obsolete - a thumb 32-bit branch instruction possibly needing page-spanning branch workaround
+pub const ARM_THUMB_32BIT_BRANCH: u8 = 7;
+
+/*
+ * For these two r_type relocations they always have a pair following them
+ * and the r_length bits are used differently.  The encoding of the
+ * r_length is as follows:
+ * low bit of r_length:
+ *  0 - :lower16: for movw instructions
+ *  1 - :upper16: for movt instructions
+ * high bit of r_length:
+ *  0 - arm instructions
+ *  1 - thumb instructions
+ * the other half of the relocated expression is in the following pair
+ * relocation entry in the the low 16 bits of r_address field.
+ */
+pub const ARM_RELOC_HALF: u8 = 8;
+pub const ARM_RELOC_HALF_SECTDIFF: u8 = 9;
+
+// Definitions from "/usr/include/mach-o/arm64/reloc.h".
+
+/*
+ * Relocation types used in the arm64 implementation.
+ */
+/// for pointers
+pub const ARM64_RELOC_UNSIGNED: u8 = 0;
+/// must be followed by a ARM64_RELOC_UNSIGNED
+pub const ARM64_RELOC_SUBTRACTOR: u8 = 1;
+/// a B/BL instruction with 26-bit displacement
+pub const ARM64_RELOC_BRANCH26: u8 = 2;
+/// pc-rel distance to page of target
+pub const ARM64_RELOC_PAGE21: u8 = 3;
+/// offset within page, scaled by r_length
+pub const ARM64_RELOC_PAGEOFF12: u8 = 4;
+/// pc-rel distance to page of GOT slot
+pub const ARM64_RELOC_GOT_LOAD_PAGE21: u8 = 5;
+/// offset within page of GOT slot, scaled by r_length
+pub const ARM64_RELOC_GOT_LOAD_PAGEOFF12: u8 = 6;
+/// for pointers to GOT slots
+pub const ARM64_RELOC_POINTER_TO_GOT: u8 = 7;
+/// pc-rel distance to page of TLVP slot
+pub const ARM64_RELOC_TLVP_LOAD_PAGE21: u8 = 8;
+/// offset within page of TLVP slot, scaled by r_length
+pub const ARM64_RELOC_TLVP_LOAD_PAGEOFF12: u8 = 9;
+/// must be followed by PAGE21 or PAGEOFF12
+pub const ARM64_RELOC_ADDEND: u8 = 10;
+
+// An arm64e authenticated pointer.
+//
+// Represents a pointer to a symbol (like ARM64_RELOC_UNSIGNED).
+// Additionally, the resulting pointer is signed.  The signature is
+// specified in the target location: the addend is restricted to the lower
+// 32 bits (instead of the full 64 bits for ARM64_RELOC_UNSIGNED):
+//
+//   |63|62|61-51|50-49|  48  |47     -     32|31  -  0|
+//   | 1| 0|  0  | key | addr | discriminator | addend |
+//
+// The key is one of:
+//   IA: 00 IB: 01
+//   DA: 10 DB: 11
+//
+// The discriminator field is used as extra signature diversification.
+//
+// The addr field indicates whether the target address should be blended
+// into the discriminator.
+//
+pub const ARM64_RELOC_AUTHENTICATED_POINTER: u8 = 11;
+
+// Definitions from "/usr/include/mach-o/ppc/reloc.h".
+
+/*
+ * Relocation types used in the ppc implementation.  Relocation entries for
+ * things other than instructions use the same generic relocation as discribed
+ * above and their r_type is RELOC_VANILLA.  The rest of the relocation types
+ * are for instructions.  Since they are for instructions the r_address field
+ * indicates the 32 bit instruction that the relocation is to be preformed on.
+ * The fields r_pcrel and r_length are ignored for non-RELOC_VANILLA r_types
+ * except for PPC_RELOC_BR14.
+ *
+ * For PPC_RELOC_BR14 if the r_length is the unused value 3, then the branch was
+ * statically predicted setting or clearing the Y-bit based on the sign of the
+ * displacement or the opcode.  If this is the case the static linker must flip
+ * the value of the Y-bit if the sign of the displacement changes for non-branch
+ * always conditions.
+ */
+/// generic relocation as discribed above
+pub const PPC_RELOC_VANILLA: u8 = 0;
+/// the second relocation entry of a pair
+pub const PPC_RELOC_PAIR: u8 = 1;
+/// 14 bit branch displacement (to a word address)
+pub const PPC_RELOC_BR14: u8 = 2;
+/// 24 bit branch displacement (to a word address)
+pub const PPC_RELOC_BR24: u8 = 3;
+/// a PAIR follows with the low half
+pub const PPC_RELOC_HI16: u8 = 4;
+/// a PAIR follows with the high half
+pub const PPC_RELOC_LO16: u8 = 5;
+/// Same as the RELOC_HI16 except the low 16 bits and the high 16 bits are added together
+/// with the low 16 bits sign extened first.  This means if bit 15 of the low 16 bits is
+/// set the high 16 bits stored in the instruction will be adjusted.
+pub const PPC_RELOC_HA16: u8 = 6;
+/// Same as the LO16 except that the low 2 bits are not stored in the instruction and are
+/// always zero.  This is used in double word load/store instructions.
+pub const PPC_RELOC_LO14: u8 = 7;
+/// a PAIR follows with subtract symbol value
+pub const PPC_RELOC_SECTDIFF: u8 = 8;
+/// prebound lazy pointer
+pub const PPC_RELOC_PB_LA_PTR: u8 = 9;
+/// section difference forms of above.  a PAIR
+pub const PPC_RELOC_HI16_SECTDIFF: u8 = 10;
+/// follows these with subtract symbol value
+pub const PPC_RELOC_LO16_SECTDIFF: u8 = 11;
+pub const PPC_RELOC_HA16_SECTDIFF: u8 = 12;
+pub const PPC_RELOC_JBSR: u8 = 13;
+pub const PPC_RELOC_LO14_SECTDIFF: u8 = 14;
+/// like PPC_RELOC_SECTDIFF, but the symbol referenced was local.
+pub const PPC_RELOC_LOCAL_SECTDIFF: u8 = 15;
+
+// Definitions from "/usr/include/mach-o/x86_64/reloc.h".
+
+/*
+ * Relocations for x86_64 are a bit different than for other architectures in
+ * Mach-O: Scattered relocations are not used.  Almost all relocations produced
+ * by the compiler are external relocations.  An external relocation has the
+ * r_extern bit set to 1 and the r_symbolnum field contains the symbol table
+ * index of the target label.
+ *
+ * When the assembler is generating relocations, if the target label is a local
+ * label (begins with 'L'), then the previous non-local label in the same
+ * section is used as the target of the external relocation.  An addend is used
+ * with the distance from that non-local label to the target label.  Only when
+ * there is no previous non-local label in the section is an internal
+ * relocation used.
+ *
+ * The addend (i.e. the 4 in _foo+4) is encoded in the instruction (Mach-O does
+ * not have RELA relocations).  For PC-relative relocations, the addend is
+ * stored directly in the instruction.  This is different from other Mach-O
+ * architectures, which encode the addend minus the current section offset.
+ *
+ * The relocation types are:
+ *
+ * 	X86_64_RELOC_UNSIGNED	// for absolute addresses
+ * 	X86_64_RELOC_SIGNED		// for signed 32-bit displacement
+ * 	X86_64_RELOC_BRANCH		// a CALL/JMP instruction with 32-bit displacement
+ * 	X86_64_RELOC_GOT_LOAD	// a MOVQ load of a GOT entry
+ * 	X86_64_RELOC_GOT		// other GOT references
+ * 	X86_64_RELOC_SUBTRACTOR	// must be followed by a X86_64_RELOC_UNSIGNED
+ *
+ * The following are sample assembly instructions, followed by the relocation
+ * and section content they generate in an object file:
+ *
+ * 	call _foo
+ * 		r_type=X86_64_RELOC_BRANCH, r_length=2, r_extern=1, r_pcrel=1, r_symbolnum=_foo
+ * 		E8 00 00 00 00
+ *
+ * 	call _foo+4
+ * 		r_type=X86_64_RELOC_BRANCH, r_length=2, r_extern=1, r_pcrel=1, r_symbolnum=_foo
+ * 		E8 04 00 00 00
+ *
+ * 	movq _foo@GOTPCREL(%rip), %rax
+ * 		r_type=X86_64_RELOC_GOT_LOAD, r_length=2, r_extern=1, r_pcrel=1, r_symbolnum=_foo
+ * 		48 8B 05 00 00 00 00
+ *
+ * 	pushq _foo@GOTPCREL(%rip)
+ * 		r_type=X86_64_RELOC_GOT, r_length=2, r_extern=1, r_pcrel=1, r_symbolnum=_foo
+ * 		FF 35 00 00 00 00
+ *
+ * 	movl _foo(%rip), %eax
+ * 		r_type=X86_64_RELOC_SIGNED, r_length=2, r_extern=1, r_pcrel=1, r_symbolnum=_foo
+ * 		8B 05 00 00 00 00
+ *
+ * 	movl _foo+4(%rip), %eax
+ * 		r_type=X86_64_RELOC_SIGNED, r_length=2, r_extern=1, r_pcrel=1, r_symbolnum=_foo
+ * 		8B 05 04 00 00 00
+ *
+ * 	movb  $0x12, _foo(%rip)
+ * 		r_type=X86_64_RELOC_SIGNED, r_length=2, r_extern=1, r_pcrel=1, r_symbolnum=_foo
+ * 		C6 05 FF FF FF FF 12
+ *
+ * 	movl  $0x12345678, _foo(%rip)
+ * 		r_type=X86_64_RELOC_SIGNED, r_length=2, r_extern=1, r_pcrel=1, r_symbolnum=_foo
+ * 		C7 05 FC FF FF FF 78 56 34 12
+ *
+ * 	.quad _foo
+ * 		r_type=X86_64_RELOC_UNSIGNED, r_length=3, r_extern=1, r_pcrel=0, r_symbolnum=_foo
+ * 		00 00 00 00 00 00 00 00
+ *
+ * 	.quad _foo+4
+ * 		r_type=X86_64_RELOC_UNSIGNED, r_length=3, r_extern=1, r_pcrel=0, r_symbolnum=_foo
+ * 		04 00 00 00 00 00 00 00
+ *
+ * 	.quad _foo - _bar
+ * 		r_type=X86_64_RELOC_SUBTRACTOR, r_length=3, r_extern=1, r_pcrel=0, r_symbolnum=_bar
+ * 		r_type=X86_64_RELOC_UNSIGNED, r_length=3, r_extern=1, r_pcrel=0, r_symbolnum=_foo
+ * 		00 00 00 00 00 00 00 00
+ *
+ * 	.quad _foo - _bar + 4
+ * 		r_type=X86_64_RELOC_SUBTRACTOR, r_length=3, r_extern=1, r_pcrel=0, r_symbolnum=_bar
+ * 		r_type=X86_64_RELOC_UNSIGNED, r_length=3, r_extern=1, r_pcrel=0, r_symbolnum=_foo
+ * 		04 00 00 00 00 00 00 00
+ *
+ * 	.long _foo - _bar
+ * 		r_type=X86_64_RELOC_SUBTRACTOR, r_length=2, r_extern=1, r_pcrel=0, r_symbolnum=_bar
+ * 		r_type=X86_64_RELOC_UNSIGNED, r_length=2, r_extern=1, r_pcrel=0, r_symbolnum=_foo
+ * 		00 00 00 00
+ *
+ * 	lea L1(%rip), %rax
+ * 		r_type=X86_64_RELOC_SIGNED, r_length=2, r_extern=1, r_pcrel=1, r_symbolnum=_prev
+ * 		48 8d 05 12 00 00 00
+ * 		// assumes _prev is the first non-local label 0x12 bytes before L1
+ *
+ * 	lea L0(%rip), %rax
+ * 		r_type=X86_64_RELOC_SIGNED, r_length=2, r_extern=0, r_pcrel=1, r_symbolnum=3
+ * 		48 8d 05 56 00 00 00
+ *		// assumes L0 is in third section and there is no previous non-local label.
+ *		// The rip-relative-offset of 0x00000056 is L0-address_of_next_instruction.
+ *		// address_of_next_instruction is the address of the relocation + 4.
+ *
+ *     add     $6,L0(%rip)
+ *             r_type=X86_64_RELOC_SIGNED_1, r_length=2, r_extern=0, r_pcrel=1, r_symbolnum=3
+ *		83 05 18 00 00 00 06
+ *		// assumes L0 is in third section and there is no previous non-local label.
+ *		// The rip-relative-offset of 0x00000018 is L0-address_of_next_instruction.
+ *		// address_of_next_instruction is the address of the relocation + 4 + 1.
+ *		// The +1 comes from SIGNED_1.  This is used because the relocation is not
+ *		// at the end of the instruction.
+ *
+ * 	.quad L1
+ * 		r_type=X86_64_RELOC_UNSIGNED, r_length=3, r_extern=1, r_pcrel=0, r_symbolnum=_prev
+ * 		12 00 00 00 00 00 00 00
+ * 		// assumes _prev is the first non-local label 0x12 bytes before L1
+ *
+ * 	.quad L0
+ * 		r_type=X86_64_RELOC_UNSIGNED, r_length=3, r_extern=0, r_pcrel=0, r_symbolnum=3
+ * 		56 00 00 00 00 00 00 00
+ * 		// assumes L0 is in third section, has an address of 0x00000056 in .o
+ * 		// file, and there is no previous non-local label
+ *
+ * 	.quad _foo - .
+ * 		r_type=X86_64_RELOC_SUBTRACTOR, r_length=3, r_extern=1, r_pcrel=0, r_symbolnum=_prev
+ * 		r_type=X86_64_RELOC_UNSIGNED, r_length=3, r_extern=1, r_pcrel=0, r_symbolnum=_foo
+ * 		EE FF FF FF FF FF FF FF
+ * 		// assumes _prev is the first non-local label 0x12 bytes before this
+ * 		// .quad
+ *
+ * 	.quad _foo - L1
+ * 		r_type=X86_64_RELOC_SUBTRACTOR, r_length=3, r_extern=1, r_pcrel=0, r_symbolnum=_prev
+ * 		r_type=X86_64_RELOC_UNSIGNED, r_length=3, r_extern=1, r_pcrel=0, r_symbolnum=_foo
+ * 		EE FF FF FF FF FF FF FF
+ * 		// assumes _prev is the first non-local label 0x12 bytes before L1
+ *
+ * 	.quad L1 - _prev
+ * 		// No relocations.  This is an assembly time constant.
+ * 		12 00 00 00 00 00 00 00
+ * 		// assumes _prev is the first non-local label 0x12 bytes before L1
+ *
+ *
+ *
+ * In final linked images, there are only two valid relocation kinds:
+ *
+ *     r_type=X86_64_RELOC_UNSIGNED, r_length=3, r_pcrel=0, r_extern=1, r_symbolnum=sym_index
+ *	This tells dyld to add the address of a symbol to a pointer sized (8-byte)
+ *  piece of data (i.e on disk the 8-byte piece of data contains the addend). The
+ *  r_symbolnum contains the index into the symbol table of the target symbol.
+ *
+ *     r_type=X86_64_RELOC_UNSIGNED, r_length=3, r_pcrel=0, r_extern=0, r_symbolnum=0
+ * This tells dyld to adjust the pointer sized (8-byte) piece of data by the amount
+ * the containing image was loaded from its base address (e.g. slide).
+ *
+ */
+/// for absolute addresses
+pub const X86_64_RELOC_UNSIGNED: u8 = 0;
+/// for signed 32-bit displacement
+pub const X86_64_RELOC_SIGNED: u8 = 1;
+/// a CALL/JMP instruction with 32-bit displacement
+pub const X86_64_RELOC_BRANCH: u8 = 2;
+/// a MOVQ load of a GOT entry
+pub const X86_64_RELOC_GOT_LOAD: u8 = 3;
+/// other GOT references
+pub const X86_64_RELOC_GOT: u8 = 4;
+/// must be followed by a X86_64_RELOC_UNSIGNED
+pub const X86_64_RELOC_SUBTRACTOR: u8 = 5;
+/// for signed 32-bit displacement with a -1 addend
+pub const X86_64_RELOC_SIGNED_1: u8 = 6;
+/// for signed 32-bit displacement with a -2 addend
+pub const X86_64_RELOC_SIGNED_2: u8 = 7;
+/// for signed 32-bit displacement with a -4 addend
+pub const X86_64_RELOC_SIGNED_4: u8 = 8;
+/// for thread local variables
+pub const X86_64_RELOC_TLV: u8 = 9;
+
+unsafe_impl_pod!(FatHeader, FatArch32, FatArch64,);
+unsafe_impl_endian_pod!(
+    DyldCacheHeader,
+    DyldCacheMappingInfo,
+    DyldCacheImageInfo,
+    DyldSubCacheInfo,
+    MachHeader32,
+    MachHeader64,
+    LoadCommand,
+    LcStr,
+    SegmentCommand32,
+    SegmentCommand64,
+    Section32,
+    Section64,
+    Fvmlib,
+    FvmlibCommand,
+    Dylib,
+    DylibCommand,
+    SubFrameworkCommand,
+    SubClientCommand,
+    SubUmbrellaCommand,
+    SubLibraryCommand,
+    PreboundDylibCommand,
+    DylinkerCommand,
+    ThreadCommand,
+    RoutinesCommand32,
+    RoutinesCommand64,
+    SymtabCommand,
+    DysymtabCommand,
+    DylibTableOfContents,
+    DylibModule32,
+    DylibModule64,
+    DylibReference,
+    TwolevelHintsCommand,
+    TwolevelHint,
+    PrebindCksumCommand,
+    UuidCommand,
+    RpathCommand,
+    LinkeditDataCommand,
+    FilesetEntryCommand,
+    EncryptionInfoCommand32,
+    EncryptionInfoCommand64,
+    VersionMinCommand,
+    BuildVersionCommand,
+    BuildToolVersion,
+    DyldInfoCommand,
+    LinkerOptionCommand,
+    SymsegCommand,
+    IdentCommand,
+    FvmfileCommand,
+    EntryPointCommand,
+    SourceVersionCommand,
+    DataInCodeEntry,
+    //TlvDescriptor,
+    NoteCommand,
+    Nlist32,
+    Nlist64,
+    Relocation,
+);
diff --git a/third_party/rust/object/src/pe.rs b/third_party/rust/object/src/pe.rs
new file mode 100644
index 0000000000..00105adac8
--- /dev/null
+++ b/third_party/rust/object/src/pe.rs
@@ -0,0 +1,3050 @@
+//! PE/COFF definitions.
+//!
+//! These definitions are independent of read/write support, although we do implement
+//! some traits useful for those.
+//!
+//! This module is based heavily on "winnt.h" (10.0.17763.0).
+
+#![allow(missing_docs)]
+
+use crate::endian::{LittleEndian as LE, U16Bytes, U32Bytes, I32, U16, U32, U64};
+use crate::pod::Pod;
+
+/// MZ
+pub const IMAGE_DOS_SIGNATURE: u16 = 0x5A4D;
+/// NE
+pub const IMAGE_OS2_SIGNATURE: u16 = 0x454E;
+/// LE
+pub const IMAGE_OS2_SIGNATURE_LE: u16 = 0x454C;
+/// LE
+pub const IMAGE_VXD_SIGNATURE: u16 = 0x454C;
+/// PE00
+pub const IMAGE_NT_SIGNATURE: u32 = 0x0000_4550;
+
+/// DOS .EXE header
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageDosHeader {
+    /// Magic number
+    pub e_magic: U16<LE>,
+    /// Bytes on last page of file
+    pub e_cblp: U16<LE>,
+    /// Pages in file
+    pub e_cp: U16<LE>,
+    /// Relocations
+    pub e_crlc: U16<LE>,
+    /// Size of header in paragraphs
+    pub e_cparhdr: U16<LE>,
+    /// Minimum extra paragraphs needed
+    pub e_minalloc: U16<LE>,
+    /// Maximum extra paragraphs needed
+    pub e_maxalloc: U16<LE>,
+    /// Initial (relative) SS value
+    pub e_ss: U16<LE>,
+    /// Initial SP value
+    pub e_sp: U16<LE>,
+    /// Checksum
+    pub e_csum: U16<LE>,
+    /// Initial IP value
+    pub e_ip: U16<LE>,
+    /// Initial (relative) CS value
+    pub e_cs: U16<LE>,
+    /// File address of relocation table
+    pub e_lfarlc: U16<LE>,
+    /// Overlay number
+    pub e_ovno: U16<LE>,
+    /// Reserved words
+    pub e_res: [U16<LE>; 4],
+    /// OEM identifier (for e_oeminfo)
+    pub e_oemid: U16<LE>,
+    /// OEM information; e_oemid specific
+    pub e_oeminfo: U16<LE>,
+    /// Reserved words
+    pub e_res2: [U16<LE>; 10],
+    /// File address of new exe header
+    pub e_lfanew: U32<LE>,
+}
+
+/// OS/2 .EXE header
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageOs2Header {
+    /// Magic number
+    pub ne_magic: U16<LE>,
+    /// Version number
+    pub ne_ver: i8,
+    /// Revision number
+    pub ne_rev: i8,
+    /// Offset of Entry Table
+    pub ne_enttab: U16<LE>,
+    /// Number of bytes in Entry Table
+    pub ne_cbenttab: U16<LE>,
+    /// Checksum of whole file
+    pub ne_crc: I32<LE>,
+    /// Flag word
+    pub ne_flags: U16<LE>,
+    /// Automatic data segment number
+    pub ne_autodata: U16<LE>,
+    /// Initial heap allocation
+    pub ne_heap: U16<LE>,
+    /// Initial stack allocation
+    pub ne_stack: U16<LE>,
+    /// Initial CS:IP setting
+    pub ne_csip: I32<LE>,
+    /// Initial SS:SP setting
+    pub ne_sssp: I32<LE>,
+    /// Count of file segments
+    pub ne_cseg: U16<LE>,
+    /// Entries in Module Reference Table
+    pub ne_cmod: U16<LE>,
+    /// Size of non-resident name table
+    pub ne_cbnrestab: U16<LE>,
+    /// Offset of Segment Table
+    pub ne_segtab: U16<LE>,
+    /// Offset of Resource Table
+    pub ne_rsrctab: U16<LE>,
+    /// Offset of resident name table
+    pub ne_restab: U16<LE>,
+    /// Offset of Module Reference Table
+    pub ne_modtab: U16<LE>,
+    /// Offset of Imported Names Table
+    pub ne_imptab: U16<LE>,
+    /// Offset of Non-resident Names Table
+    pub ne_nrestab: I32<LE>,
+    /// Count of movable entries
+    pub ne_cmovent: U16<LE>,
+    /// Segment alignment shift count
+    pub ne_align: U16<LE>,
+    /// Count of resource segments
+    pub ne_cres: U16<LE>,
+    /// Target Operating system
+    pub ne_exetyp: u8,
+    /// Other .EXE flags
+    pub ne_flagsothers: u8,
+    /// offset to return thunks
+    pub ne_pretthunks: U16<LE>,
+    /// offset to segment ref. bytes
+    pub ne_psegrefbytes: U16<LE>,
+    /// Minimum code swap area size
+    pub ne_swaparea: U16<LE>,
+    /// Expected Windows version number
+    pub ne_expver: U16<LE>,
+}
+
+/// Windows VXD header
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageVxdHeader {
+    /// Magic number
+    pub e32_magic: U16<LE>,
+    /// The byte ordering for the VXD
+    pub e32_border: u8,
+    /// The word ordering for the VXD
+    pub e32_worder: u8,
+    /// The EXE format level for now = 0
+    pub e32_level: U32<LE>,
+    /// The CPU type
+    pub e32_cpu: U16<LE>,
+    /// The OS type
+    pub e32_os: U16<LE>,
+    /// Module version
+    pub e32_ver: U32<LE>,
+    /// Module flags
+    pub e32_mflags: U32<LE>,
+    /// Module # pages
+    pub e32_mpages: U32<LE>,
+    /// Object # for instruction pointer
+    pub e32_startobj: U32<LE>,
+    /// Extended instruction pointer
+    pub e32_eip: U32<LE>,
+    /// Object # for stack pointer
+    pub e32_stackobj: U32<LE>,
+    /// Extended stack pointer
+    pub e32_esp: U32<LE>,
+    /// VXD page size
+    pub e32_pagesize: U32<LE>,
+    /// Last page size in VXD
+    pub e32_lastpagesize: U32<LE>,
+    /// Fixup section size
+    pub e32_fixupsize: U32<LE>,
+    /// Fixup section checksum
+    pub e32_fixupsum: U32<LE>,
+    /// Loader section size
+    pub e32_ldrsize: U32<LE>,
+    /// Loader section checksum
+    pub e32_ldrsum: U32<LE>,
+    /// Object table offset
+    pub e32_objtab: U32<LE>,
+    /// Number of objects in module
+    pub e32_objcnt: U32<LE>,
+    /// Object page map offset
+    pub e32_objmap: U32<LE>,
+    /// Object iterated data map offset
+    pub e32_itermap: U32<LE>,
+    /// Offset of Resource Table
+    pub e32_rsrctab: U32<LE>,
+    /// Number of resource entries
+    pub e32_rsrccnt: U32<LE>,
+    /// Offset of resident name table
+    pub e32_restab: U32<LE>,
+    /// Offset of Entry Table
+    pub e32_enttab: U32<LE>,
+    /// Offset of Module Directive Table
+    pub e32_dirtab: U32<LE>,
+    /// Number of module directives
+    pub e32_dircnt: U32<LE>,
+    /// Offset of Fixup Page Table
+    pub e32_fpagetab: U32<LE>,
+    /// Offset of Fixup Record Table
+    pub e32_frectab: U32<LE>,
+    /// Offset of Import Module Name Table
+    pub e32_impmod: U32<LE>,
+    /// Number of entries in Import Module Name Table
+    pub e32_impmodcnt: U32<LE>,
+    /// Offset of Import Procedure Name Table
+    pub e32_impproc: U32<LE>,
+    /// Offset of Per-Page Checksum Table
+    pub e32_pagesum: U32<LE>,
+    /// Offset of Enumerated Data Pages
+    pub e32_datapage: U32<LE>,
+    /// Number of preload pages
+    pub e32_preload: U32<LE>,
+    /// Offset of Non-resident Names Table
+    pub e32_nrestab: U32<LE>,
+    /// Size of Non-resident Name Table
+    pub e32_cbnrestab: U32<LE>,
+    /// Non-resident Name Table Checksum
+    pub e32_nressum: U32<LE>,
+    /// Object # for automatic data object
+    pub e32_autodata: U32<LE>,
+    /// Offset of the debugging information
+    pub e32_debuginfo: U32<LE>,
+    /// The length of the debugging info. in bytes
+    pub e32_debuglen: U32<LE>,
+    /// Number of instance pages in preload section of VXD file
+    pub e32_instpreload: U32<LE>,
+    /// Number of instance pages in demand load section of VXD file
+    pub e32_instdemand: U32<LE>,
+    /// Size of heap - for 16-bit apps
+    pub e32_heapsize: U32<LE>,
+    /// Reserved words
+    pub e32_res3: [u8; 12],
+    pub e32_winresoff: U32<LE>,
+    pub e32_winreslen: U32<LE>,
+    /// Device ID for VxD
+    pub e32_devid: U16<LE>,
+    /// DDK version for VxD
+    pub e32_ddkver: U16<LE>,
+}
+
+/// A PE rich header entry.
+///
+/// Rich headers have no official documentation, but have been heavily
+/// reversed-engineered and documented in the wild, e.g.:
+/// * `http://www.ntcore.com/files/richsign.htm`
+/// * `https://www.researchgate.net/figure/Structure-of-the-Rich-Header_fig1_318145388`
+///
+/// This data is "masked", i.e. XORed with a checksum derived from the file data.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct MaskedRichHeaderEntry {
+    pub masked_comp_id: U32<LE>,
+    pub masked_count: U32<LE>,
+}
+
+//
+// File header format.
+//
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageFileHeader {
+    pub machine: U16<LE>,
+    pub number_of_sections: U16<LE>,
+    pub time_date_stamp: U32<LE>,
+    pub pointer_to_symbol_table: U32<LE>,
+    pub number_of_symbols: U32<LE>,
+    pub size_of_optional_header: U16<LE>,
+    pub characteristics: U16<LE>,
+}
+
+pub const IMAGE_SIZEOF_FILE_HEADER: usize = 20;
+
+/// Relocation info stripped from file.
+pub const IMAGE_FILE_RELOCS_STRIPPED: u16 = 0x0001;
+/// File is executable  (i.e. no unresolved external references).
+pub const IMAGE_FILE_EXECUTABLE_IMAGE: u16 = 0x0002;
+/// Line nunbers stripped from file.
+pub const IMAGE_FILE_LINE_NUMS_STRIPPED: u16 = 0x0004;
+/// Local symbols stripped from file.
+pub const IMAGE_FILE_LOCAL_SYMS_STRIPPED: u16 = 0x0008;
+/// Aggressively trim working set
+pub const IMAGE_FILE_AGGRESIVE_WS_TRIM: u16 = 0x0010;
+/// App can handle >2gb addresses
+pub const IMAGE_FILE_LARGE_ADDRESS_AWARE: u16 = 0x0020;
+/// Bytes of machine word are reversed.
+pub const IMAGE_FILE_BYTES_REVERSED_LO: u16 = 0x0080;
+/// 32 bit word machine.
+pub const IMAGE_FILE_32BIT_MACHINE: u16 = 0x0100;
+/// Debugging info stripped from file in .DBG file
+pub const IMAGE_FILE_DEBUG_STRIPPED: u16 = 0x0200;
+/// If Image is on removable media, copy and run from the swap file.
+pub const IMAGE_FILE_REMOVABLE_RUN_FROM_SWAP: u16 = 0x0400;
+/// If Image is on Net, copy and run from the swap file.
+pub const IMAGE_FILE_NET_RUN_FROM_SWAP: u16 = 0x0800;
+/// System File.
+pub const IMAGE_FILE_SYSTEM: u16 = 0x1000;
+/// File is a DLL.
+pub const IMAGE_FILE_DLL: u16 = 0x2000;
+/// File should only be run on a UP machine
+pub const IMAGE_FILE_UP_SYSTEM_ONLY: u16 = 0x4000;
+/// Bytes of machine word are reversed.
+pub const IMAGE_FILE_BYTES_REVERSED_HI: u16 = 0x8000;
+
+pub const IMAGE_FILE_MACHINE_UNKNOWN: u16 = 0;
+/// Useful for indicating we want to interact with the host and not a WoW guest.
+pub const IMAGE_FILE_MACHINE_TARGET_HOST: u16 = 0x0001;
+/// Intel 386.
+pub const IMAGE_FILE_MACHINE_I386: u16 = 0x014c;
+/// MIPS little-endian, 0x160 big-endian
+pub const IMAGE_FILE_MACHINE_R3000: u16 = 0x0162;
+/// MIPS little-endian
+pub const IMAGE_FILE_MACHINE_R4000: u16 = 0x0166;
+/// MIPS little-endian
+pub const IMAGE_FILE_MACHINE_R10000: u16 = 0x0168;
+/// MIPS little-endian WCE v2
+pub const IMAGE_FILE_MACHINE_WCEMIPSV2: u16 = 0x0169;
+/// Alpha_AXP
+pub const IMAGE_FILE_MACHINE_ALPHA: u16 = 0x0184;
+/// SH3 little-endian
+pub const IMAGE_FILE_MACHINE_SH3: u16 = 0x01a2;
+pub const IMAGE_FILE_MACHINE_SH3DSP: u16 = 0x01a3;
+/// SH3E little-endian
+pub const IMAGE_FILE_MACHINE_SH3E: u16 = 0x01a4;
+/// SH4 little-endian
+pub const IMAGE_FILE_MACHINE_SH4: u16 = 0x01a6;
+/// SH5
+pub const IMAGE_FILE_MACHINE_SH5: u16 = 0x01a8;
+/// ARM Little-Endian
+pub const IMAGE_FILE_MACHINE_ARM: u16 = 0x01c0;
+/// ARM Thumb/Thumb-2 Little-Endian
+pub const IMAGE_FILE_MACHINE_THUMB: u16 = 0x01c2;
+/// ARM Thumb-2 Little-Endian
+pub const IMAGE_FILE_MACHINE_ARMNT: u16 = 0x01c4;
+pub const IMAGE_FILE_MACHINE_AM33: u16 = 0x01d3;
+/// IBM PowerPC Little-Endian
+pub const IMAGE_FILE_MACHINE_POWERPC: u16 = 0x01F0;
+pub const IMAGE_FILE_MACHINE_POWERPCFP: u16 = 0x01f1;
+/// Intel 64
+pub const IMAGE_FILE_MACHINE_IA64: u16 = 0x0200;
+/// MIPS
+pub const IMAGE_FILE_MACHINE_MIPS16: u16 = 0x0266;
+/// ALPHA64
+pub const IMAGE_FILE_MACHINE_ALPHA64: u16 = 0x0284;
+/// MIPS
+pub const IMAGE_FILE_MACHINE_MIPSFPU: u16 = 0x0366;
+/// MIPS
+pub const IMAGE_FILE_MACHINE_MIPSFPU16: u16 = 0x0466;
+pub const IMAGE_FILE_MACHINE_AXP64: u16 = IMAGE_FILE_MACHINE_ALPHA64;
+/// Infineon
+pub const IMAGE_FILE_MACHINE_TRICORE: u16 = 0x0520;
+pub const IMAGE_FILE_MACHINE_CEF: u16 = 0x0CEF;
+/// EFI Byte Code
+pub const IMAGE_FILE_MACHINE_EBC: u16 = 0x0EBC;
+/// AMD64 (K8)
+pub const IMAGE_FILE_MACHINE_AMD64: u16 = 0x8664;
+/// M32R little-endian
+pub const IMAGE_FILE_MACHINE_M32R: u16 = 0x9041;
+/// ARM64 Little-Endian
+pub const IMAGE_FILE_MACHINE_ARM64: u16 = 0xAA64;
+pub const IMAGE_FILE_MACHINE_CEE: u16 = 0xC0EE;
+/// RISCV32
+pub const IMAGE_FILE_MACHINE_RISCV32: u16 = 0x5032;
+/// RISCV64
+pub const IMAGE_FILE_MACHINE_RISCV64: u16 = 0x5064;
+/// RISCV128
+pub const IMAGE_FILE_MACHINE_RISCV128: u16 = 0x5128;
+
+//
+// Directory format.
+//
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageDataDirectory {
+    pub virtual_address: U32<LE>,
+    pub size: U32<LE>,
+}
+
+pub const IMAGE_NUMBEROF_DIRECTORY_ENTRIES: usize = 16;
+
+//
+// Optional header format.
+//
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageOptionalHeader32 {
+    // Standard fields.
+    pub magic: U16<LE>,
+    pub major_linker_version: u8,
+    pub minor_linker_version: u8,
+    pub size_of_code: U32<LE>,
+    pub size_of_initialized_data: U32<LE>,
+    pub size_of_uninitialized_data: U32<LE>,
+    pub address_of_entry_point: U32<LE>,
+    pub base_of_code: U32<LE>,
+    pub base_of_data: U32<LE>,
+
+    // NT additional fields.
+    pub image_base: U32<LE>,
+    pub section_alignment: U32<LE>,
+    pub file_alignment: U32<LE>,
+    pub major_operating_system_version: U16<LE>,
+    pub minor_operating_system_version: U16<LE>,
+    pub major_image_version: U16<LE>,
+    pub minor_image_version: U16<LE>,
+    pub major_subsystem_version: U16<LE>,
+    pub minor_subsystem_version: U16<LE>,
+    pub win32_version_value: U32<LE>,
+    pub size_of_image: U32<LE>,
+    pub size_of_headers: U32<LE>,
+    pub check_sum: U32<LE>,
+    pub subsystem: U16<LE>,
+    pub dll_characteristics: U16<LE>,
+    pub size_of_stack_reserve: U32<LE>,
+    pub size_of_stack_commit: U32<LE>,
+    pub size_of_heap_reserve: U32<LE>,
+    pub size_of_heap_commit: U32<LE>,
+    pub loader_flags: U32<LE>,
+    pub number_of_rva_and_sizes: U32<LE>,
+    //pub data_directory: [ImageDataDirectory; IMAGE_NUMBEROF_DIRECTORY_ENTRIES],
+}
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageRomOptionalHeader {
+    pub magic: U16<LE>,
+    pub major_linker_version: u8,
+    pub minor_linker_version: u8,
+    pub size_of_code: U32<LE>,
+    pub size_of_initialized_data: U32<LE>,
+    pub size_of_uninitialized_data: U32<LE>,
+    pub address_of_entry_point: U32<LE>,
+    pub base_of_code: U32<LE>,
+    pub base_of_data: U32<LE>,
+    pub base_of_bss: U32<LE>,
+    pub gpr_mask: U32<LE>,
+    pub cpr_mask: [U32<LE>; 4],
+    pub gp_value: U32<LE>,
+}
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageOptionalHeader64 {
+    pub magic: U16<LE>,
+    pub major_linker_version: u8,
+    pub minor_linker_version: u8,
+    pub size_of_code: U32<LE>,
+    pub size_of_initialized_data: U32<LE>,
+    pub size_of_uninitialized_data: U32<LE>,
+    pub address_of_entry_point: U32<LE>,
+    pub base_of_code: U32<LE>,
+    pub image_base: U64<LE>,
+    pub section_alignment: U32<LE>,
+    pub file_alignment: U32<LE>,
+    pub major_operating_system_version: U16<LE>,
+    pub minor_operating_system_version: U16<LE>,
+    pub major_image_version: U16<LE>,
+    pub minor_image_version: U16<LE>,
+    pub major_subsystem_version: U16<LE>,
+    pub minor_subsystem_version: U16<LE>,
+    pub win32_version_value: U32<LE>,
+    pub size_of_image: U32<LE>,
+    pub size_of_headers: U32<LE>,
+    pub check_sum: U32<LE>,
+    pub subsystem: U16<LE>,
+    pub dll_characteristics: U16<LE>,
+    pub size_of_stack_reserve: U64<LE>,
+    pub size_of_stack_commit: U64<LE>,
+    pub size_of_heap_reserve: U64<LE>,
+    pub size_of_heap_commit: U64<LE>,
+    pub loader_flags: U32<LE>,
+    pub number_of_rva_and_sizes: U32<LE>,
+    //pub data_directory: [ImageDataDirectory; IMAGE_NUMBEROF_DIRECTORY_ENTRIES],
+}
+
+pub const IMAGE_NT_OPTIONAL_HDR32_MAGIC: u16 = 0x10b;
+pub const IMAGE_NT_OPTIONAL_HDR64_MAGIC: u16 = 0x20b;
+pub const IMAGE_ROM_OPTIONAL_HDR_MAGIC: u16 = 0x107;
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageNtHeaders64 {
+    pub signature: U32<LE>,
+    pub file_header: ImageFileHeader,
+    pub optional_header: ImageOptionalHeader64,
+}
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageNtHeaders32 {
+    pub signature: U32<LE>,
+    pub file_header: ImageFileHeader,
+    pub optional_header: ImageOptionalHeader32,
+}
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageRomHeaders {
+    pub file_header: ImageFileHeader,
+    pub optional_header: ImageRomOptionalHeader,
+}
+
+// Values for `ImageOptionalHeader*::subsystem`.
+
+/// Unknown subsystem.
+pub const IMAGE_SUBSYSTEM_UNKNOWN: u16 = 0;
+/// Image doesn't require a subsystem.
+pub const IMAGE_SUBSYSTEM_NATIVE: u16 = 1;
+/// Image runs in the Windows GUI subsystem.
+pub const IMAGE_SUBSYSTEM_WINDOWS_GUI: u16 = 2;
+/// Image runs in the Windows character subsystem.
+pub const IMAGE_SUBSYSTEM_WINDOWS_CUI: u16 = 3;
+/// image runs in the OS/2 character subsystem.
+pub const IMAGE_SUBSYSTEM_OS2_CUI: u16 = 5;
+/// image runs in the Posix character subsystem.
+pub const IMAGE_SUBSYSTEM_POSIX_CUI: u16 = 7;
+/// image is a native Win9x driver.
+pub const IMAGE_SUBSYSTEM_NATIVE_WINDOWS: u16 = 8;
+/// Image runs in the Windows CE subsystem.
+pub const IMAGE_SUBSYSTEM_WINDOWS_CE_GUI: u16 = 9;
+pub const IMAGE_SUBSYSTEM_EFI_APPLICATION: u16 = 10;
+pub const IMAGE_SUBSYSTEM_EFI_BOOT_SERVICE_DRIVER: u16 = 11;
+pub const IMAGE_SUBSYSTEM_EFI_RUNTIME_DRIVER: u16 = 12;
+pub const IMAGE_SUBSYSTEM_EFI_ROM: u16 = 13;
+pub const IMAGE_SUBSYSTEM_XBOX: u16 = 14;
+pub const IMAGE_SUBSYSTEM_WINDOWS_BOOT_APPLICATION: u16 = 16;
+pub const IMAGE_SUBSYSTEM_XBOX_CODE_CATALOG: u16 = 17;
+
+// Values for `ImageOptionalHeader*::dll_characteristics`.
+
+//      IMAGE_LIBRARY_PROCESS_INIT            0x0001     // Reserved.
+//      IMAGE_LIBRARY_PROCESS_TERM            0x0002     // Reserved.
+//      IMAGE_LIBRARY_THREAD_INIT             0x0004     // Reserved.
+//      IMAGE_LIBRARY_THREAD_TERM             0x0008     // Reserved.
+/// Image can handle a high entropy 64-bit virtual address space.
+pub const IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA: u16 = 0x0020;
+/// DLL can move.
+pub const IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE: u16 = 0x0040;
+/// Code Integrity Image
+pub const IMAGE_DLLCHARACTERISTICS_FORCE_INTEGRITY: u16 = 0x0080;
+/// Image is NX compatible
+pub const IMAGE_DLLCHARACTERISTICS_NX_COMPAT: u16 = 0x0100;
+/// Image understands isolation and doesn't want it
+pub const IMAGE_DLLCHARACTERISTICS_NO_ISOLATION: u16 = 0x0200;
+/// Image does not use SEH.  No SE handler may reside in this image
+pub const IMAGE_DLLCHARACTERISTICS_NO_SEH: u16 = 0x0400;
+/// Do not bind this image.
+pub const IMAGE_DLLCHARACTERISTICS_NO_BIND: u16 = 0x0800;
+/// Image should execute in an AppContainer
+pub const IMAGE_DLLCHARACTERISTICS_APPCONTAINER: u16 = 0x1000;
+/// Driver uses WDM model
+pub const IMAGE_DLLCHARACTERISTICS_WDM_DRIVER: u16 = 0x2000;
+/// Image supports Control Flow Guard.
+pub const IMAGE_DLLCHARACTERISTICS_GUARD_CF: u16 = 0x4000;
+pub const IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE: u16 = 0x8000;
+
+// Indices for `ImageOptionalHeader*::data_directory`.
+
+/// Export Directory
+pub const IMAGE_DIRECTORY_ENTRY_EXPORT: usize = 0;
+/// Import Directory
+pub const IMAGE_DIRECTORY_ENTRY_IMPORT: usize = 1;
+/// Resource Directory
+pub const IMAGE_DIRECTORY_ENTRY_RESOURCE: usize = 2;
+/// Exception Directory
+pub const IMAGE_DIRECTORY_ENTRY_EXCEPTION: usize = 3;
+/// Security Directory
+pub const IMAGE_DIRECTORY_ENTRY_SECURITY: usize = 4;
+/// Base Relocation Table
+pub const IMAGE_DIRECTORY_ENTRY_BASERELOC: usize = 5;
+/// Debug Directory
+pub const IMAGE_DIRECTORY_ENTRY_DEBUG: usize = 6;
+//      IMAGE_DIRECTORY_ENTRY_COPYRIGHT       7   // (X86 usage)
+/// Architecture Specific Data
+pub const IMAGE_DIRECTORY_ENTRY_ARCHITECTURE: usize = 7;
+/// RVA of GP
+pub const IMAGE_DIRECTORY_ENTRY_GLOBALPTR: usize = 8;
+/// TLS Directory
+pub const IMAGE_DIRECTORY_ENTRY_TLS: usize = 9;
+/// Load Configuration Directory
+pub const IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG: usize = 10;
+/// Bound Import Directory in headers
+pub const IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT: usize = 11;
+/// Import Address Table
+pub const IMAGE_DIRECTORY_ENTRY_IAT: usize = 12;
+/// Delay Load Import Descriptors
+pub const IMAGE_DIRECTORY_ENTRY_DELAY_IMPORT: usize = 13;
+/// COM Runtime descriptor
+pub const IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR: usize = 14;
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct Guid {
+    pub data1: U32<LE>,
+    pub data2: U16<LE>,
+    pub data3: U16<LE>,
+    pub data4: [u8; 8],
+}
+
+pub type ClsId = Guid;
+
+/// Non-COFF Object file header
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct AnonObjectHeader {
+    /// Must be IMAGE_FILE_MACHINE_UNKNOWN
+    pub sig1: U16<LE>,
+    /// Must be 0xffff
+    pub sig2: U16<LE>,
+    /// >= 1 (implies the ClsId field is present)
+    pub version: U16<LE>,
+    pub machine: U16<LE>,
+    pub time_date_stamp: U32<LE>,
+    /// Used to invoke CoCreateInstance
+    pub class_id: ClsId,
+    /// Size of data that follows the header
+    pub size_of_data: U32<LE>,
+}
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct AnonObjectHeaderV2 {
+    /// Must be IMAGE_FILE_MACHINE_UNKNOWN
+    pub sig1: U16<LE>,
+    /// Must be 0xffff
+    pub sig2: U16<LE>,
+    /// >= 2 (implies the Flags field is present - otherwise V1)
+    pub version: U16<LE>,
+    pub machine: U16<LE>,
+    pub time_date_stamp: U32<LE>,
+    /// Used to invoke CoCreateInstance
+    pub class_id: ClsId,
+    /// Size of data that follows the header
+    pub size_of_data: U32<LE>,
+    /// 0x1 -> contains metadata
+    pub flags: U32<LE>,
+    /// Size of CLR metadata
+    pub meta_data_size: U32<LE>,
+    /// Offset of CLR metadata
+    pub meta_data_offset: U32<LE>,
+}
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct AnonObjectHeaderBigobj {
+    /* same as ANON_OBJECT_HEADER_V2 */
+    /// Must be IMAGE_FILE_MACHINE_UNKNOWN
+    pub sig1: U16<LE>,
+    /// Must be 0xffff
+    pub sig2: U16<LE>,
+    /// >= 2 (implies the Flags field is present)
+    pub version: U16<LE>,
+    /// Actual machine - IMAGE_FILE_MACHINE_xxx
+    pub machine: U16<LE>,
+    pub time_date_stamp: U32<LE>,
+    /// {D1BAA1C7-BAEE-4ba9-AF20-FAF66AA4DCB8}
+    pub class_id: ClsId,
+    /// Size of data that follows the header
+    pub size_of_data: U32<LE>,
+    /// 0x1 -> contains metadata
+    pub flags: U32<LE>,
+    /// Size of CLR metadata
+    pub meta_data_size: U32<LE>,
+    /// Offset of CLR metadata
+    pub meta_data_offset: U32<LE>,
+
+    /* bigobj specifics */
+    /// extended from WORD
+    pub number_of_sections: U32<LE>,
+    pub pointer_to_symbol_table: U32<LE>,
+    pub number_of_symbols: U32<LE>,
+}
+
+pub const IMAGE_SIZEOF_SHORT_NAME: usize = 8;
+
+//
+// Section header format.
+//
+
+#[derive(Debug, Default, Clone, Copy)]
+#[repr(C)]
+pub struct ImageSectionHeader {
+    pub name: [u8; IMAGE_SIZEOF_SHORT_NAME],
+    pub virtual_size: U32<LE>,
+    pub virtual_address: U32<LE>,
+    pub size_of_raw_data: U32<LE>,
+    pub pointer_to_raw_data: U32<LE>,
+    pub pointer_to_relocations: U32<LE>,
+    pub pointer_to_linenumbers: U32<LE>,
+    pub number_of_relocations: U16<LE>,
+    pub number_of_linenumbers: U16<LE>,
+    pub characteristics: U32<LE>,
+}
+
+pub const IMAGE_SIZEOF_SECTION_HEADER: usize = 40;
+
+// Values for `ImageSectionHeader::characteristics`.
+
+//      IMAGE_SCN_TYPE_REG                   0x00000000  // Reserved.
+//      IMAGE_SCN_TYPE_DSECT                 0x00000001  // Reserved.
+//      IMAGE_SCN_TYPE_NOLOAD                0x00000002  // Reserved.
+//      IMAGE_SCN_TYPE_GROUP                 0x00000004  // Reserved.
+/// Reserved.
+pub const IMAGE_SCN_TYPE_NO_PAD: u32 = 0x0000_0008;
+//      IMAGE_SCN_TYPE_COPY                  0x00000010  // Reserved.
+
+/// Section contains code.
+pub const IMAGE_SCN_CNT_CODE: u32 = 0x0000_0020;
+/// Section contains initialized data.
+pub const IMAGE_SCN_CNT_INITIALIZED_DATA: u32 = 0x0000_0040;
+/// Section contains uninitialized data.
+pub const IMAGE_SCN_CNT_UNINITIALIZED_DATA: u32 = 0x0000_0080;
+
+/// Reserved.
+pub const IMAGE_SCN_LNK_OTHER: u32 = 0x0000_0100;
+/// Section contains comments or some other type of information.
+pub const IMAGE_SCN_LNK_INFO: u32 = 0x0000_0200;
+//      IMAGE_SCN_TYPE_OVER                  0x00000400  // Reserved.
+/// Section contents will not become part of image.
+pub const IMAGE_SCN_LNK_REMOVE: u32 = 0x0000_0800;
+/// Section contents comdat.
+pub const IMAGE_SCN_LNK_COMDAT: u32 = 0x0000_1000;
+//                                           0x00002000  // Reserved.
+//      IMAGE_SCN_MEM_PROTECTED - Obsolete   0x00004000
+/// Reset speculative exceptions handling bits in the TLB entries for this section.
+pub const IMAGE_SCN_NO_DEFER_SPEC_EXC: u32 = 0x0000_4000;
+/// Section content can be accessed relative to GP
+pub const IMAGE_SCN_GPREL: u32 = 0x0000_8000;
+pub const IMAGE_SCN_MEM_FARDATA: u32 = 0x0000_8000;
+//      IMAGE_SCN_MEM_SYSHEAP  - Obsolete    0x00010000
+pub const IMAGE_SCN_MEM_PURGEABLE: u32 = 0x0002_0000;
+pub const IMAGE_SCN_MEM_16BIT: u32 = 0x0002_0000;
+pub const IMAGE_SCN_MEM_LOCKED: u32 = 0x0004_0000;
+pub const IMAGE_SCN_MEM_PRELOAD: u32 = 0x0008_0000;
+
+pub const IMAGE_SCN_ALIGN_1BYTES: u32 = 0x0010_0000;
+pub const IMAGE_SCN_ALIGN_2BYTES: u32 = 0x0020_0000;
+pub const IMAGE_SCN_ALIGN_4BYTES: u32 = 0x0030_0000;
+pub const IMAGE_SCN_ALIGN_8BYTES: u32 = 0x0040_0000;
+/// Default alignment if no others are specified.
+pub const IMAGE_SCN_ALIGN_16BYTES: u32 = 0x0050_0000;
+pub const IMAGE_SCN_ALIGN_32BYTES: u32 = 0x0060_0000;
+pub const IMAGE_SCN_ALIGN_64BYTES: u32 = 0x0070_0000;
+pub const IMAGE_SCN_ALIGN_128BYTES: u32 = 0x0080_0000;
+pub const IMAGE_SCN_ALIGN_256BYTES: u32 = 0x0090_0000;
+pub const IMAGE_SCN_ALIGN_512BYTES: u32 = 0x00A0_0000;
+pub const IMAGE_SCN_ALIGN_1024BYTES: u32 = 0x00B0_0000;
+pub const IMAGE_SCN_ALIGN_2048BYTES: u32 = 0x00C0_0000;
+pub const IMAGE_SCN_ALIGN_4096BYTES: u32 = 0x00D0_0000;
+pub const IMAGE_SCN_ALIGN_8192BYTES: u32 = 0x00E0_0000;
+// Unused                                    0x00F0_0000
+pub const IMAGE_SCN_ALIGN_MASK: u32 = 0x00F0_0000;
+
+/// Section contains extended relocations.
+pub const IMAGE_SCN_LNK_NRELOC_OVFL: u32 = 0x0100_0000;
+/// Section can be discarded.
+pub const IMAGE_SCN_MEM_DISCARDABLE: u32 = 0x0200_0000;
+/// Section is not cachable.
+pub const IMAGE_SCN_MEM_NOT_CACHED: u32 = 0x0400_0000;
+/// Section is not pageable.
+pub const IMAGE_SCN_MEM_NOT_PAGED: u32 = 0x0800_0000;
+/// Section is shareable.
+pub const IMAGE_SCN_MEM_SHARED: u32 = 0x1000_0000;
+/// Section is executable.
+pub const IMAGE_SCN_MEM_EXECUTE: u32 = 0x2000_0000;
+/// Section is readable.
+pub const IMAGE_SCN_MEM_READ: u32 = 0x4000_0000;
+/// Section is writeable.
+pub const IMAGE_SCN_MEM_WRITE: u32 = 0x8000_0000;
+
+//
+// TLS Characteristic Flags
+//
+/// Tls index is scaled
+pub const IMAGE_SCN_SCALE_INDEX: u32 = 0x0000_0001;
+
+//
+// Symbol format.
+//
+
+// This struct has alignment 1.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageSymbol {
+    /// If first 4 bytes are 0, then second 4 bytes are offset into string table.
+    pub name: [u8; 8],
+    pub value: U32Bytes<LE>,
+    pub section_number: U16Bytes<LE>,
+    pub typ: U16Bytes<LE>,
+    pub storage_class: u8,
+    pub number_of_aux_symbols: u8,
+}
+
+pub const IMAGE_SIZEOF_SYMBOL: usize = 18;
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageSymbolBytes(pub [u8; IMAGE_SIZEOF_SYMBOL]);
+
+// This struct has alignment 1.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageSymbolEx {
+    /// If first 4 bytes are 0, then second 4 bytes are offset into string table.
+    pub name: [u8; 8],
+    pub value: U32Bytes<LE>,
+    pub section_number: U32Bytes<LE>,
+    pub typ: U16Bytes<LE>,
+    pub storage_class: u8,
+    pub number_of_aux_symbols: u8,
+}
+
+pub const IMAGE_SIZEOF_SYMBOL_EX: usize = 20;
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageSymbolExBytes(pub [u8; IMAGE_SIZEOF_SYMBOL_EX]);
+
+// Values for `ImageSymbol::section_number`.
+//
+// Symbols have a section number of the section in which they are
+// defined. Otherwise, section numbers have the following meanings:
+
+/// Symbol is undefined or is common.
+pub const IMAGE_SYM_UNDEFINED: u16 = 0;
+/// Symbol is an absolute value.
+pub const IMAGE_SYM_ABSOLUTE: u16 = 0xffff;
+/// Symbol is a special debug item.
+pub const IMAGE_SYM_DEBUG: u16 = 0xfffe;
+/// Values 0xFF00-0xFFFF are special
+pub const IMAGE_SYM_SECTION_MAX: u16 = 0xFEFF;
+pub const IMAGE_SYM_SECTION_MAX_EX: u32 = 0x7fff_ffff;
+
+// Values for `ImageSymbol::typ` (basic component).
+
+/// no type.
+pub const IMAGE_SYM_TYPE_NULL: u16 = 0x0000;
+pub const IMAGE_SYM_TYPE_VOID: u16 = 0x0001;
+/// type character.
+pub const IMAGE_SYM_TYPE_CHAR: u16 = 0x0002;
+/// type short integer.
+pub const IMAGE_SYM_TYPE_SHORT: u16 = 0x0003;
+pub const IMAGE_SYM_TYPE_INT: u16 = 0x0004;
+pub const IMAGE_SYM_TYPE_LONG: u16 = 0x0005;
+pub const IMAGE_SYM_TYPE_FLOAT: u16 = 0x0006;
+pub const IMAGE_SYM_TYPE_DOUBLE: u16 = 0x0007;
+pub const IMAGE_SYM_TYPE_STRUCT: u16 = 0x0008;
+pub const IMAGE_SYM_TYPE_UNION: u16 = 0x0009;
+/// enumeration.
+pub const IMAGE_SYM_TYPE_ENUM: u16 = 0x000A;
+/// member of enumeration.
+pub const IMAGE_SYM_TYPE_MOE: u16 = 0x000B;
+pub const IMAGE_SYM_TYPE_BYTE: u16 = 0x000C;
+pub const IMAGE_SYM_TYPE_WORD: u16 = 0x000D;
+pub const IMAGE_SYM_TYPE_UINT: u16 = 0x000E;
+pub const IMAGE_SYM_TYPE_DWORD: u16 = 0x000F;
+pub const IMAGE_SYM_TYPE_PCODE: u16 = 0x8000;
+
+// Values for `ImageSymbol::typ` (derived component).
+
+/// no derived type.
+pub const IMAGE_SYM_DTYPE_NULL: u16 = 0;
+/// pointer.
+pub const IMAGE_SYM_DTYPE_POINTER: u16 = 1;
+/// function.
+pub const IMAGE_SYM_DTYPE_FUNCTION: u16 = 2;
+/// array.
+pub const IMAGE_SYM_DTYPE_ARRAY: u16 = 3;
+
+// Values for `ImageSymbol::storage_class`.
+pub const IMAGE_SYM_CLASS_END_OF_FUNCTION: u8 = 0xff;
+pub const IMAGE_SYM_CLASS_NULL: u8 = 0x00;
+pub const IMAGE_SYM_CLASS_AUTOMATIC: u8 = 0x01;
+pub const IMAGE_SYM_CLASS_EXTERNAL: u8 = 0x02;
+pub const IMAGE_SYM_CLASS_STATIC: u8 = 0x03;
+pub const IMAGE_SYM_CLASS_REGISTER: u8 = 0x04;
+pub const IMAGE_SYM_CLASS_EXTERNAL_DEF: u8 = 0x05;
+pub const IMAGE_SYM_CLASS_LABEL: u8 = 0x06;
+pub const IMAGE_SYM_CLASS_UNDEFINED_LABEL: u8 = 0x07;
+pub const IMAGE_SYM_CLASS_MEMBER_OF_STRUCT: u8 = 0x08;
+pub const IMAGE_SYM_CLASS_ARGUMENT: u8 = 0x09;
+pub const IMAGE_SYM_CLASS_STRUCT_TAG: u8 = 0x0A;
+pub const IMAGE_SYM_CLASS_MEMBER_OF_UNION: u8 = 0x0B;
+pub const IMAGE_SYM_CLASS_UNION_TAG: u8 = 0x0C;
+pub const IMAGE_SYM_CLASS_TYPE_DEFINITION: u8 = 0x0D;
+pub const IMAGE_SYM_CLASS_UNDEFINED_STATIC: u8 = 0x0E;
+pub const IMAGE_SYM_CLASS_ENUM_TAG: u8 = 0x0F;
+pub const IMAGE_SYM_CLASS_MEMBER_OF_ENUM: u8 = 0x10;
+pub const IMAGE_SYM_CLASS_REGISTER_PARAM: u8 = 0x11;
+pub const IMAGE_SYM_CLASS_BIT_FIELD: u8 = 0x12;
+
+pub const IMAGE_SYM_CLASS_FAR_EXTERNAL: u8 = 0x44;
+
+pub const IMAGE_SYM_CLASS_BLOCK: u8 = 0x64;
+pub const IMAGE_SYM_CLASS_FUNCTION: u8 = 0x65;
+pub const IMAGE_SYM_CLASS_END_OF_STRUCT: u8 = 0x66;
+pub const IMAGE_SYM_CLASS_FILE: u8 = 0x67;
+// new
+pub const IMAGE_SYM_CLASS_SECTION: u8 = 0x68;
+pub const IMAGE_SYM_CLASS_WEAK_EXTERNAL: u8 = 0x69;
+
+pub const IMAGE_SYM_CLASS_CLR_TOKEN: u8 = 0x6B;
+
+// type packing constants
+
+pub const N_BTMASK: u16 = 0x000F;
+pub const N_TMASK: u16 = 0x0030;
+pub const N_TMASK1: u16 = 0x00C0;
+pub const N_TMASK2: u16 = 0x00F0;
+pub const N_BTSHFT: usize = 4;
+pub const N_TSHIFT: usize = 2;
+
+pub const IMAGE_SYM_DTYPE_SHIFT: usize = N_BTSHFT;
+
+impl ImageSymbol {
+    #[inline]
+    pub fn base_type(&self) -> u16 {
+        self.typ.get(LE) & N_BTMASK
+    }
+
+    #[inline]
+    pub fn derived_type(&self) -> u16 {
+        (self.typ.get(LE) & N_TMASK) >> N_BTSHFT
+    }
+}
+
+impl ImageSymbolEx {
+    #[inline]
+    pub fn base_type(&self) -> u16 {
+        self.typ.get(LE) & N_BTMASK
+    }
+
+    #[inline]
+    pub fn derived_type(&self) -> u16 {
+        (self.typ.get(LE) & N_TMASK) >> N_BTSHFT
+    }
+}
+
+//
+// Auxiliary entry format.
+//
+
+// Used for both ImageSymbol and ImageSymbolEx (with padding).
+// This struct has alignment 1.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageAuxSymbolTokenDef {
+    /// IMAGE_AUX_SYMBOL_TYPE
+    pub aux_type: u8,
+    /// Must be 0
+    pub reserved1: u8,
+    pub symbol_table_index: U32Bytes<LE>,
+    /// Must be 0
+    pub reserved2: [u8; 12],
+}
+
+pub const IMAGE_AUX_SYMBOL_TYPE_TOKEN_DEF: u16 = 1;
+
+/// Auxiliary symbol format 1: function definitions.
+// This struct has alignment 1.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageAuxSymbolFunction {
+    pub tag_index: U32Bytes<LE>,
+    pub total_size: U32Bytes<LE>,
+    pub pointer_to_linenumber: U32Bytes<LE>,
+    pub pointer_to_next_function: U32Bytes<LE>,
+    pub unused: [u8; 2],
+}
+
+/// Auxiliary symbol format 2: .bf and .ef symbols.
+// This struct has alignment 1.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageAuxSymbolFunctionBeginEnd {
+    pub unused1: [u8; 4],
+    /// declaration line number
+    pub linenumber: U16Bytes<LE>,
+    pub unused2: [u8; 6],
+    pub pointer_to_next_function: U32Bytes<LE>,
+    pub unused3: [u8; 2],
+}
+
+/// Auxiliary symbol format 3: weak externals.
+///
+/// Used for both `ImageSymbol` and `ImageSymbolEx` (both with padding).
+// This struct has alignment 1.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageAuxSymbolWeak {
+    /// the weak extern default symbol index
+    pub weak_default_sym_index: U32Bytes<LE>,
+    pub weak_search_type: U32Bytes<LE>,
+}
+
+/// Auxiliary symbol format 5: sections.
+///
+/// Used for both `ImageSymbol` and `ImageSymbolEx` (with padding).
+// This struct has alignment 1.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageAuxSymbolSection {
+    /// section length
+    pub length: U32Bytes<LE>,
+    /// number of relocation entries
+    pub number_of_relocations: U16Bytes<LE>,
+    /// number of line numbers
+    pub number_of_linenumbers: U16Bytes<LE>,
+    /// checksum for communal
+    pub check_sum: U32Bytes<LE>,
+    /// section number to associate with
+    pub number: U16Bytes<LE>,
+    /// communal selection type
+    pub selection: u8,
+    pub reserved: u8,
+    /// high bits of the section number
+    pub high_number: U16Bytes<LE>,
+}
+
+// Used for both ImageSymbol and ImageSymbolEx (both with padding).
+// This struct has alignment 1.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageAuxSymbolCrc {
+    pub crc: U32Bytes<LE>,
+}
+
+//
+// Communal selection types.
+//
+
+pub const IMAGE_COMDAT_SELECT_NODUPLICATES: u8 = 1;
+pub const IMAGE_COMDAT_SELECT_ANY: u8 = 2;
+pub const IMAGE_COMDAT_SELECT_SAME_SIZE: u8 = 3;
+pub const IMAGE_COMDAT_SELECT_EXACT_MATCH: u8 = 4;
+pub const IMAGE_COMDAT_SELECT_ASSOCIATIVE: u8 = 5;
+pub const IMAGE_COMDAT_SELECT_LARGEST: u8 = 6;
+pub const IMAGE_COMDAT_SELECT_NEWEST: u8 = 7;
+
+pub const IMAGE_WEAK_EXTERN_SEARCH_NOLIBRARY: u16 = 1;
+pub const IMAGE_WEAK_EXTERN_SEARCH_LIBRARY: u16 = 2;
+pub const IMAGE_WEAK_EXTERN_SEARCH_ALIAS: u16 = 3;
+pub const IMAGE_WEAK_EXTERN_ANTI_DEPENDENCY: u16 = 4;
+
+//
+// Relocation format.
+//
+
+// This struct has alignment 1.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageRelocation {
+    /// Also `RelocCount` when IMAGE_SCN_LNK_NRELOC_OVFL is set
+    pub virtual_address: U32Bytes<LE>,
+    pub symbol_table_index: U32Bytes<LE>,
+    pub typ: U16Bytes<LE>,
+}
+
+//
+// I386 relocation types.
+//
+/// Reference is absolute, no relocation is necessary
+pub const IMAGE_REL_I386_ABSOLUTE: u16 = 0x0000;
+/// Direct 16-bit reference to the symbols virtual address
+pub const IMAGE_REL_I386_DIR16: u16 = 0x0001;
+/// PC-relative 16-bit reference to the symbols virtual address
+pub const IMAGE_REL_I386_REL16: u16 = 0x0002;
+/// Direct 32-bit reference to the symbols virtual address
+pub const IMAGE_REL_I386_DIR32: u16 = 0x0006;
+/// Direct 32-bit reference to the symbols virtual address, base not included
+pub const IMAGE_REL_I386_DIR32NB: u16 = 0x0007;
+/// Direct 16-bit reference to the segment-selector bits of a 32-bit virtual address
+pub const IMAGE_REL_I386_SEG12: u16 = 0x0009;
+pub const IMAGE_REL_I386_SECTION: u16 = 0x000A;
+pub const IMAGE_REL_I386_SECREL: u16 = 0x000B;
+/// clr token
+pub const IMAGE_REL_I386_TOKEN: u16 = 0x000C;
+/// 7 bit offset from base of section containing target
+pub const IMAGE_REL_I386_SECREL7: u16 = 0x000D;
+/// PC-relative 32-bit reference to the symbols virtual address
+pub const IMAGE_REL_I386_REL32: u16 = 0x0014;
+
+//
+// MIPS relocation types.
+//
+/// Reference is absolute, no relocation is necessary
+pub const IMAGE_REL_MIPS_ABSOLUTE: u16 = 0x0000;
+pub const IMAGE_REL_MIPS_REFHALF: u16 = 0x0001;
+pub const IMAGE_REL_MIPS_REFWORD: u16 = 0x0002;
+pub const IMAGE_REL_MIPS_JMPADDR: u16 = 0x0003;
+pub const IMAGE_REL_MIPS_REFHI: u16 = 0x0004;
+pub const IMAGE_REL_MIPS_REFLO: u16 = 0x0005;
+pub const IMAGE_REL_MIPS_GPREL: u16 = 0x0006;
+pub const IMAGE_REL_MIPS_LITERAL: u16 = 0x0007;
+pub const IMAGE_REL_MIPS_SECTION: u16 = 0x000A;
+pub const IMAGE_REL_MIPS_SECREL: u16 = 0x000B;
+/// Low 16-bit section relative referemce (used for >32k TLS)
+pub const IMAGE_REL_MIPS_SECRELLO: u16 = 0x000C;
+/// High 16-bit section relative reference (used for >32k TLS)
+pub const IMAGE_REL_MIPS_SECRELHI: u16 = 0x000D;
+/// clr token
+pub const IMAGE_REL_MIPS_TOKEN: u16 = 0x000E;
+pub const IMAGE_REL_MIPS_JMPADDR16: u16 = 0x0010;
+pub const IMAGE_REL_MIPS_REFWORDNB: u16 = 0x0022;
+pub const IMAGE_REL_MIPS_PAIR: u16 = 0x0025;
+
+//
+// Alpha Relocation types.
+//
+pub const IMAGE_REL_ALPHA_ABSOLUTE: u16 = 0x0000;
+pub const IMAGE_REL_ALPHA_REFLONG: u16 = 0x0001;
+pub const IMAGE_REL_ALPHA_REFQUAD: u16 = 0x0002;
+pub const IMAGE_REL_ALPHA_GPREL32: u16 = 0x0003;
+pub const IMAGE_REL_ALPHA_LITERAL: u16 = 0x0004;
+pub const IMAGE_REL_ALPHA_LITUSE: u16 = 0x0005;
+pub const IMAGE_REL_ALPHA_GPDISP: u16 = 0x0006;
+pub const IMAGE_REL_ALPHA_BRADDR: u16 = 0x0007;
+pub const IMAGE_REL_ALPHA_HINT: u16 = 0x0008;
+pub const IMAGE_REL_ALPHA_INLINE_REFLONG: u16 = 0x0009;
+pub const IMAGE_REL_ALPHA_REFHI: u16 = 0x000A;
+pub const IMAGE_REL_ALPHA_REFLO: u16 = 0x000B;
+pub const IMAGE_REL_ALPHA_PAIR: u16 = 0x000C;
+pub const IMAGE_REL_ALPHA_MATCH: u16 = 0x000D;
+pub const IMAGE_REL_ALPHA_SECTION: u16 = 0x000E;
+pub const IMAGE_REL_ALPHA_SECREL: u16 = 0x000F;
+pub const IMAGE_REL_ALPHA_REFLONGNB: u16 = 0x0010;
+/// Low 16-bit section relative reference
+pub const IMAGE_REL_ALPHA_SECRELLO: u16 = 0x0011;
+/// High 16-bit section relative reference
+pub const IMAGE_REL_ALPHA_SECRELHI: u16 = 0x0012;
+/// High 16 bits of 48 bit reference
+pub const IMAGE_REL_ALPHA_REFQ3: u16 = 0x0013;
+/// Middle 16 bits of 48 bit reference
+pub const IMAGE_REL_ALPHA_REFQ2: u16 = 0x0014;
+/// Low 16 bits of 48 bit reference
+pub const IMAGE_REL_ALPHA_REFQ1: u16 = 0x0015;
+/// Low 16-bit GP relative reference
+pub const IMAGE_REL_ALPHA_GPRELLO: u16 = 0x0016;
+/// High 16-bit GP relative reference
+pub const IMAGE_REL_ALPHA_GPRELHI: u16 = 0x0017;
+
+//
+// IBM PowerPC relocation types.
+//
+/// NOP
+pub const IMAGE_REL_PPC_ABSOLUTE: u16 = 0x0000;
+/// 64-bit address
+pub const IMAGE_REL_PPC_ADDR64: u16 = 0x0001;
+/// 32-bit address
+pub const IMAGE_REL_PPC_ADDR32: u16 = 0x0002;
+/// 26-bit address, shifted left 2 (branch absolute)
+pub const IMAGE_REL_PPC_ADDR24: u16 = 0x0003;
+/// 16-bit address
+pub const IMAGE_REL_PPC_ADDR16: u16 = 0x0004;
+/// 16-bit address, shifted left 2 (load doubleword)
+pub const IMAGE_REL_PPC_ADDR14: u16 = 0x0005;
+/// 26-bit PC-relative offset, shifted left 2 (branch relative)
+pub const IMAGE_REL_PPC_REL24: u16 = 0x0006;
+/// 16-bit PC-relative offset, shifted left 2 (br cond relative)
+pub const IMAGE_REL_PPC_REL14: u16 = 0x0007;
+/// 16-bit offset from TOC base
+pub const IMAGE_REL_PPC_TOCREL16: u16 = 0x0008;
+/// 16-bit offset from TOC base, shifted left 2 (load doubleword)
+pub const IMAGE_REL_PPC_TOCREL14: u16 = 0x0009;
+
+/// 32-bit addr w/o image base
+pub const IMAGE_REL_PPC_ADDR32NB: u16 = 0x000A;
+/// va of containing section (as in an image sectionhdr)
+pub const IMAGE_REL_PPC_SECREL: u16 = 0x000B;
+/// sectionheader number
+pub const IMAGE_REL_PPC_SECTION: u16 = 0x000C;
+/// substitute TOC restore instruction iff symbol is glue code
+pub const IMAGE_REL_PPC_IFGLUE: u16 = 0x000D;
+/// symbol is glue code; virtual address is TOC restore instruction
+pub const IMAGE_REL_PPC_IMGLUE: u16 = 0x000E;
+/// va of containing section (limited to 16 bits)
+pub const IMAGE_REL_PPC_SECREL16: u16 = 0x000F;
+pub const IMAGE_REL_PPC_REFHI: u16 = 0x0010;
+pub const IMAGE_REL_PPC_REFLO: u16 = 0x0011;
+pub const IMAGE_REL_PPC_PAIR: u16 = 0x0012;
+/// Low 16-bit section relative reference (used for >32k TLS)
+pub const IMAGE_REL_PPC_SECRELLO: u16 = 0x0013;
+/// High 16-bit section relative reference (used for >32k TLS)
+pub const IMAGE_REL_PPC_SECRELHI: u16 = 0x0014;
+pub const IMAGE_REL_PPC_GPREL: u16 = 0x0015;
+/// clr token
+pub const IMAGE_REL_PPC_TOKEN: u16 = 0x0016;
+
+/// mask to isolate above values in IMAGE_RELOCATION.Type
+pub const IMAGE_REL_PPC_TYPEMASK: u16 = 0x00FF;
+
+// Flag bits in `ImageRelocation::typ`.
+
+/// subtract reloc value rather than adding it
+pub const IMAGE_REL_PPC_NEG: u16 = 0x0100;
+/// fix branch prediction bit to predict branch taken
+pub const IMAGE_REL_PPC_BRTAKEN: u16 = 0x0200;
+/// fix branch prediction bit to predict branch not taken
+pub const IMAGE_REL_PPC_BRNTAKEN: u16 = 0x0400;
+/// toc slot defined in file (or, data in toc)
+pub const IMAGE_REL_PPC_TOCDEFN: u16 = 0x0800;
+
+//
+// Hitachi SH3 relocation types.
+//
+/// No relocation
+pub const IMAGE_REL_SH3_ABSOLUTE: u16 = 0x0000;
+/// 16 bit direct
+pub const IMAGE_REL_SH3_DIRECT16: u16 = 0x0001;
+/// 32 bit direct
+pub const IMAGE_REL_SH3_DIRECT32: u16 = 0x0002;
+/// 8 bit direct, -128..255
+pub const IMAGE_REL_SH3_DIRECT8: u16 = 0x0003;
+/// 8 bit direct .W (0 ext.)
+pub const IMAGE_REL_SH3_DIRECT8_WORD: u16 = 0x0004;
+/// 8 bit direct .L (0 ext.)
+pub const IMAGE_REL_SH3_DIRECT8_LONG: u16 = 0x0005;
+/// 4 bit direct (0 ext.)
+pub const IMAGE_REL_SH3_DIRECT4: u16 = 0x0006;
+/// 4 bit direct .W (0 ext.)
+pub const IMAGE_REL_SH3_DIRECT4_WORD: u16 = 0x0007;
+/// 4 bit direct .L (0 ext.)
+pub const IMAGE_REL_SH3_DIRECT4_LONG: u16 = 0x0008;
+/// 8 bit PC relative .W
+pub const IMAGE_REL_SH3_PCREL8_WORD: u16 = 0x0009;
+/// 8 bit PC relative .L
+pub const IMAGE_REL_SH3_PCREL8_LONG: u16 = 0x000A;
+/// 12 LSB PC relative .W
+pub const IMAGE_REL_SH3_PCREL12_WORD: u16 = 0x000B;
+/// Start of EXE section
+pub const IMAGE_REL_SH3_STARTOF_SECTION: u16 = 0x000C;
+/// Size of EXE section
+pub const IMAGE_REL_SH3_SIZEOF_SECTION: u16 = 0x000D;
+/// Section table index
+pub const IMAGE_REL_SH3_SECTION: u16 = 0x000E;
+/// Offset within section
+pub const IMAGE_REL_SH3_SECREL: u16 = 0x000F;
+/// 32 bit direct not based
+pub const IMAGE_REL_SH3_DIRECT32_NB: u16 = 0x0010;
+/// GP-relative addressing
+pub const IMAGE_REL_SH3_GPREL4_LONG: u16 = 0x0011;
+/// clr token
+pub const IMAGE_REL_SH3_TOKEN: u16 = 0x0012;
+/// Offset from current instruction in longwords
+/// if not NOMODE, insert the inverse of the low bit at bit 32 to select PTA/PTB
+pub const IMAGE_REL_SHM_PCRELPT: u16 = 0x0013;
+/// Low bits of 32-bit address
+pub const IMAGE_REL_SHM_REFLO: u16 = 0x0014;
+/// High bits of 32-bit address
+pub const IMAGE_REL_SHM_REFHALF: u16 = 0x0015;
+/// Low bits of relative reference
+pub const IMAGE_REL_SHM_RELLO: u16 = 0x0016;
+/// High bits of relative reference
+pub const IMAGE_REL_SHM_RELHALF: u16 = 0x0017;
+/// offset operand for relocation
+pub const IMAGE_REL_SHM_PAIR: u16 = 0x0018;
+
+/// relocation ignores section mode
+pub const IMAGE_REL_SH_NOMODE: u16 = 0x8000;
+
+/// No relocation required
+pub const IMAGE_REL_ARM_ABSOLUTE: u16 = 0x0000;
+/// 32 bit address
+pub const IMAGE_REL_ARM_ADDR32: u16 = 0x0001;
+/// 32 bit address w/o image base
+pub const IMAGE_REL_ARM_ADDR32NB: u16 = 0x0002;
+/// 24 bit offset << 2 & sign ext.
+pub const IMAGE_REL_ARM_BRANCH24: u16 = 0x0003;
+/// Thumb: 2 11 bit offsets
+pub const IMAGE_REL_ARM_BRANCH11: u16 = 0x0004;
+/// clr token
+pub const IMAGE_REL_ARM_TOKEN: u16 = 0x0005;
+/// GP-relative addressing (ARM)
+pub const IMAGE_REL_ARM_GPREL12: u16 = 0x0006;
+/// GP-relative addressing (Thumb)
+pub const IMAGE_REL_ARM_GPREL7: u16 = 0x0007;
+pub const IMAGE_REL_ARM_BLX24: u16 = 0x0008;
+pub const IMAGE_REL_ARM_BLX11: u16 = 0x0009;
+/// 32-bit relative address from byte following reloc
+pub const IMAGE_REL_ARM_REL32: u16 = 0x000A;
+/// Section table index
+pub const IMAGE_REL_ARM_SECTION: u16 = 0x000E;
+/// Offset within section
+pub const IMAGE_REL_ARM_SECREL: u16 = 0x000F;
+/// ARM: MOVW/MOVT
+pub const IMAGE_REL_ARM_MOV32A: u16 = 0x0010;
+/// ARM: MOVW/MOVT (deprecated)
+pub const IMAGE_REL_ARM_MOV32: u16 = 0x0010;
+/// Thumb: MOVW/MOVT
+pub const IMAGE_REL_ARM_MOV32T: u16 = 0x0011;
+/// Thumb: MOVW/MOVT (deprecated)
+pub const IMAGE_REL_THUMB_MOV32: u16 = 0x0011;
+/// Thumb: 32-bit conditional B
+pub const IMAGE_REL_ARM_BRANCH20T: u16 = 0x0012;
+/// Thumb: 32-bit conditional B (deprecated)
+pub const IMAGE_REL_THUMB_BRANCH20: u16 = 0x0012;
+/// Thumb: 32-bit B or BL
+pub const IMAGE_REL_ARM_BRANCH24T: u16 = 0x0014;
+/// Thumb: 32-bit B or BL (deprecated)
+pub const IMAGE_REL_THUMB_BRANCH24: u16 = 0x0014;
+/// Thumb: BLX immediate
+pub const IMAGE_REL_ARM_BLX23T: u16 = 0x0015;
+/// Thumb: BLX immediate (deprecated)
+pub const IMAGE_REL_THUMB_BLX23: u16 = 0x0015;
+
+pub const IMAGE_REL_AM_ABSOLUTE: u16 = 0x0000;
+pub const IMAGE_REL_AM_ADDR32: u16 = 0x0001;
+pub const IMAGE_REL_AM_ADDR32NB: u16 = 0x0002;
+pub const IMAGE_REL_AM_CALL32: u16 = 0x0003;
+pub const IMAGE_REL_AM_FUNCINFO: u16 = 0x0004;
+pub const IMAGE_REL_AM_REL32_1: u16 = 0x0005;
+pub const IMAGE_REL_AM_REL32_2: u16 = 0x0006;
+pub const IMAGE_REL_AM_SECREL: u16 = 0x0007;
+pub const IMAGE_REL_AM_SECTION: u16 = 0x0008;
+pub const IMAGE_REL_AM_TOKEN: u16 = 0x0009;
+
+//
+// ARM64 relocations types.
+//
+
+/// No relocation required
+pub const IMAGE_REL_ARM64_ABSOLUTE: u16 = 0x0000;
+/// 32 bit address. Review! do we need it?
+pub const IMAGE_REL_ARM64_ADDR32: u16 = 0x0001;
+/// 32 bit address w/o image base (RVA: for Data/PData/XData)
+pub const IMAGE_REL_ARM64_ADDR32NB: u16 = 0x0002;
+/// 26 bit offset << 2 & sign ext. for B & BL
+pub const IMAGE_REL_ARM64_BRANCH26: u16 = 0x0003;
+/// ADRP
+pub const IMAGE_REL_ARM64_PAGEBASE_REL21: u16 = 0x0004;
+/// ADR
+pub const IMAGE_REL_ARM64_REL21: u16 = 0x0005;
+/// ADD/ADDS (immediate) with zero shift, for page offset
+pub const IMAGE_REL_ARM64_PAGEOFFSET_12A: u16 = 0x0006;
+/// LDR (indexed, unsigned immediate), for page offset
+pub const IMAGE_REL_ARM64_PAGEOFFSET_12L: u16 = 0x0007;
+/// Offset within section
+pub const IMAGE_REL_ARM64_SECREL: u16 = 0x0008;
+/// ADD/ADDS (immediate) with zero shift, for bit 0:11 of section offset
+pub const IMAGE_REL_ARM64_SECREL_LOW12A: u16 = 0x0009;
+/// ADD/ADDS (immediate) with zero shift, for bit 12:23 of section offset
+pub const IMAGE_REL_ARM64_SECREL_HIGH12A: u16 = 0x000A;
+/// LDR (indexed, unsigned immediate), for bit 0:11 of section offset
+pub const IMAGE_REL_ARM64_SECREL_LOW12L: u16 = 0x000B;
+pub const IMAGE_REL_ARM64_TOKEN: u16 = 0x000C;
+/// Section table index
+pub const IMAGE_REL_ARM64_SECTION: u16 = 0x000D;
+/// 64 bit address
+pub const IMAGE_REL_ARM64_ADDR64: u16 = 0x000E;
+/// 19 bit offset << 2 & sign ext. for conditional B
+pub const IMAGE_REL_ARM64_BRANCH19: u16 = 0x000F;
+/// TBZ/TBNZ
+pub const IMAGE_REL_ARM64_BRANCH14: u16 = 0x0010;
+/// 32-bit relative address from byte following reloc
+pub const IMAGE_REL_ARM64_REL32: u16 = 0x0011;
+
+//
+// x64 relocations
+//
+/// Reference is absolute, no relocation is necessary
+pub const IMAGE_REL_AMD64_ABSOLUTE: u16 = 0x0000;
+/// 64-bit address (VA).
+pub const IMAGE_REL_AMD64_ADDR64: u16 = 0x0001;
+/// 32-bit address (VA).
+pub const IMAGE_REL_AMD64_ADDR32: u16 = 0x0002;
+/// 32-bit address w/o image base (RVA).
+pub const IMAGE_REL_AMD64_ADDR32NB: u16 = 0x0003;
+/// 32-bit relative address from byte following reloc
+pub const IMAGE_REL_AMD64_REL32: u16 = 0x0004;
+/// 32-bit relative address from byte distance 1 from reloc
+pub const IMAGE_REL_AMD64_REL32_1: u16 = 0x0005;
+/// 32-bit relative address from byte distance 2 from reloc
+pub const IMAGE_REL_AMD64_REL32_2: u16 = 0x0006;
+/// 32-bit relative address from byte distance 3 from reloc
+pub const IMAGE_REL_AMD64_REL32_3: u16 = 0x0007;
+/// 32-bit relative address from byte distance 4 from reloc
+pub const IMAGE_REL_AMD64_REL32_4: u16 = 0x0008;
+/// 32-bit relative address from byte distance 5 from reloc
+pub const IMAGE_REL_AMD64_REL32_5: u16 = 0x0009;
+/// Section index
+pub const IMAGE_REL_AMD64_SECTION: u16 = 0x000A;
+/// 32 bit offset from base of section containing target
+pub const IMAGE_REL_AMD64_SECREL: u16 = 0x000B;
+/// 7 bit unsigned offset from base of section containing target
+pub const IMAGE_REL_AMD64_SECREL7: u16 = 0x000C;
+/// 32 bit metadata token
+pub const IMAGE_REL_AMD64_TOKEN: u16 = 0x000D;
+/// 32 bit signed span-dependent value emitted into object
+pub const IMAGE_REL_AMD64_SREL32: u16 = 0x000E;
+pub const IMAGE_REL_AMD64_PAIR: u16 = 0x000F;
+/// 32 bit signed span-dependent value applied at link time
+pub const IMAGE_REL_AMD64_SSPAN32: u16 = 0x0010;
+pub const IMAGE_REL_AMD64_EHANDLER: u16 = 0x0011;
+/// Indirect branch to an import
+pub const IMAGE_REL_AMD64_IMPORT_BR: u16 = 0x0012;
+/// Indirect call to an import
+pub const IMAGE_REL_AMD64_IMPORT_CALL: u16 = 0x0013;
+/// Indirect branch to a CFG check
+pub const IMAGE_REL_AMD64_CFG_BR: u16 = 0x0014;
+/// Indirect branch to a CFG check, with REX.W prefix
+pub const IMAGE_REL_AMD64_CFG_BR_REX: u16 = 0x0015;
+/// Indirect call to a CFG check
+pub const IMAGE_REL_AMD64_CFG_CALL: u16 = 0x0016;
+/// Indirect branch to a target in RAX (no CFG)
+pub const IMAGE_REL_AMD64_INDIR_BR: u16 = 0x0017;
+/// Indirect branch to a target in RAX, with REX.W prefix (no CFG)
+pub const IMAGE_REL_AMD64_INDIR_BR_REX: u16 = 0x0018;
+/// Indirect call to a target in RAX (no CFG)
+pub const IMAGE_REL_AMD64_INDIR_CALL: u16 = 0x0019;
+/// Indirect branch for a switch table using Reg 0 (RAX)
+pub const IMAGE_REL_AMD64_INDIR_BR_SWITCHTABLE_FIRST: u16 = 0x0020;
+/// Indirect branch for a switch table using Reg 15 (R15)
+pub const IMAGE_REL_AMD64_INDIR_BR_SWITCHTABLE_LAST: u16 = 0x002F;
+
+//
+// IA64 relocation types.
+//
+pub const IMAGE_REL_IA64_ABSOLUTE: u16 = 0x0000;
+pub const IMAGE_REL_IA64_IMM14: u16 = 0x0001;
+pub const IMAGE_REL_IA64_IMM22: u16 = 0x0002;
+pub const IMAGE_REL_IA64_IMM64: u16 = 0x0003;
+pub const IMAGE_REL_IA64_DIR32: u16 = 0x0004;
+pub const IMAGE_REL_IA64_DIR64: u16 = 0x0005;
+pub const IMAGE_REL_IA64_PCREL21B: u16 = 0x0006;
+pub const IMAGE_REL_IA64_PCREL21M: u16 = 0x0007;
+pub const IMAGE_REL_IA64_PCREL21F: u16 = 0x0008;
+pub const IMAGE_REL_IA64_GPREL22: u16 = 0x0009;
+pub const IMAGE_REL_IA64_LTOFF22: u16 = 0x000A;
+pub const IMAGE_REL_IA64_SECTION: u16 = 0x000B;
+pub const IMAGE_REL_IA64_SECREL22: u16 = 0x000C;
+pub const IMAGE_REL_IA64_SECREL64I: u16 = 0x000D;
+pub const IMAGE_REL_IA64_SECREL32: u16 = 0x000E;
+//
+pub const IMAGE_REL_IA64_DIR32NB: u16 = 0x0010;
+pub const IMAGE_REL_IA64_SREL14: u16 = 0x0011;
+pub const IMAGE_REL_IA64_SREL22: u16 = 0x0012;
+pub const IMAGE_REL_IA64_SREL32: u16 = 0x0013;
+pub const IMAGE_REL_IA64_UREL32: u16 = 0x0014;
+/// This is always a BRL and never converted
+pub const IMAGE_REL_IA64_PCREL60X: u16 = 0x0015;
+/// If possible, convert to MBB bundle with NOP.B in slot 1
+pub const IMAGE_REL_IA64_PCREL60B: u16 = 0x0016;
+/// If possible, convert to MFB bundle with NOP.F in slot 1
+pub const IMAGE_REL_IA64_PCREL60F: u16 = 0x0017;
+/// If possible, convert to MIB bundle with NOP.I in slot 1
+pub const IMAGE_REL_IA64_PCREL60I: u16 = 0x0018;
+/// If possible, convert to MMB bundle with NOP.M in slot 1
+pub const IMAGE_REL_IA64_PCREL60M: u16 = 0x0019;
+pub const IMAGE_REL_IA64_IMMGPREL64: u16 = 0x001A;
+/// clr token
+pub const IMAGE_REL_IA64_TOKEN: u16 = 0x001B;
+pub const IMAGE_REL_IA64_GPREL32: u16 = 0x001C;
+pub const IMAGE_REL_IA64_ADDEND: u16 = 0x001F;
+
+//
+// CEF relocation types.
+//
+/// Reference is absolute, no relocation is necessary
+pub const IMAGE_REL_CEF_ABSOLUTE: u16 = 0x0000;
+/// 32-bit address (VA).
+pub const IMAGE_REL_CEF_ADDR32: u16 = 0x0001;
+/// 64-bit address (VA).
+pub const IMAGE_REL_CEF_ADDR64: u16 = 0x0002;
+/// 32-bit address w/o image base (RVA).
+pub const IMAGE_REL_CEF_ADDR32NB: u16 = 0x0003;
+/// Section index
+pub const IMAGE_REL_CEF_SECTION: u16 = 0x0004;
+/// 32 bit offset from base of section containing target
+pub const IMAGE_REL_CEF_SECREL: u16 = 0x0005;
+/// 32 bit metadata token
+pub const IMAGE_REL_CEF_TOKEN: u16 = 0x0006;
+
+//
+// clr relocation types.
+//
+/// Reference is absolute, no relocation is necessary
+pub const IMAGE_REL_CEE_ABSOLUTE: u16 = 0x0000;
+/// 32-bit address (VA).
+pub const IMAGE_REL_CEE_ADDR32: u16 = 0x0001;
+/// 64-bit address (VA).
+pub const IMAGE_REL_CEE_ADDR64: u16 = 0x0002;
+/// 32-bit address w/o image base (RVA).
+pub const IMAGE_REL_CEE_ADDR32NB: u16 = 0x0003;
+/// Section index
+pub const IMAGE_REL_CEE_SECTION: u16 = 0x0004;
+/// 32 bit offset from base of section containing target
+pub const IMAGE_REL_CEE_SECREL: u16 = 0x0005;
+/// 32 bit metadata token
+pub const IMAGE_REL_CEE_TOKEN: u16 = 0x0006;
+
+/// No relocation required
+pub const IMAGE_REL_M32R_ABSOLUTE: u16 = 0x0000;
+/// 32 bit address
+pub const IMAGE_REL_M32R_ADDR32: u16 = 0x0001;
+/// 32 bit address w/o image base
+pub const IMAGE_REL_M32R_ADDR32NB: u16 = 0x0002;
+/// 24 bit address
+pub const IMAGE_REL_M32R_ADDR24: u16 = 0x0003;
+/// GP relative addressing
+pub const IMAGE_REL_M32R_GPREL16: u16 = 0x0004;
+/// 24 bit offset << 2 & sign ext.
+pub const IMAGE_REL_M32R_PCREL24: u16 = 0x0005;
+/// 16 bit offset << 2 & sign ext.
+pub const IMAGE_REL_M32R_PCREL16: u16 = 0x0006;
+/// 8 bit offset << 2 & sign ext.
+pub const IMAGE_REL_M32R_PCREL8: u16 = 0x0007;
+/// 16 MSBs
+pub const IMAGE_REL_M32R_REFHALF: u16 = 0x0008;
+/// 16 MSBs; adj for LSB sign ext.
+pub const IMAGE_REL_M32R_REFHI: u16 = 0x0009;
+/// 16 LSBs
+pub const IMAGE_REL_M32R_REFLO: u16 = 0x000A;
+/// Link HI and LO
+pub const IMAGE_REL_M32R_PAIR: u16 = 0x000B;
+/// Section table index
+pub const IMAGE_REL_M32R_SECTION: u16 = 0x000C;
+/// 32 bit section relative reference
+pub const IMAGE_REL_M32R_SECREL32: u16 = 0x000D;
+/// clr token
+pub const IMAGE_REL_M32R_TOKEN: u16 = 0x000E;
+
+/// No relocation required
+pub const IMAGE_REL_EBC_ABSOLUTE: u16 = 0x0000;
+/// 32 bit address w/o image base
+pub const IMAGE_REL_EBC_ADDR32NB: u16 = 0x0001;
+/// 32-bit relative address from byte following reloc
+pub const IMAGE_REL_EBC_REL32: u16 = 0x0002;
+/// Section table index
+pub const IMAGE_REL_EBC_SECTION: u16 = 0x0003;
+/// Offset within section
+pub const IMAGE_REL_EBC_SECREL: u16 = 0x0004;
+
+/*
+// TODO?
+#define EXT_IMM64(Value, Address, Size, InstPos, ValPos)  /* Intel-IA64-Filler */           \
+    Value |= (((ULONGLONG)((*(Address) >> InstPos) & (((ULONGLONG)1 << Size) - 1))) << ValPos)  // Intel-IA64-Filler
+
+#define INS_IMM64(Value, Address, Size, InstPos, ValPos)  /* Intel-IA64-Filler */\
+    *(PDWORD)Address = (*(PDWORD)Address & ~(((1 << Size) - 1) << InstPos)) | /* Intel-IA64-Filler */\
+          ((DWORD)((((ULONGLONG)Value >> ValPos) & (((ULONGLONG)1 << Size) - 1))) << InstPos)  // Intel-IA64-Filler
+*/
+
+/// Intel-IA64-Filler
+pub const EMARCH_ENC_I17_IMM7B_INST_WORD_X: u16 = 3;
+/// Intel-IA64-Filler
+pub const EMARCH_ENC_I17_IMM7B_SIZE_X: u16 = 7;
+/// Intel-IA64-Filler
+pub const EMARCH_ENC_I17_IMM7B_INST_WORD_POS_X: u16 = 4;
+/// Intel-IA64-Filler
+pub const EMARCH_ENC_I17_IMM7B_VAL_POS_X: u16 = 0;
+
+/// Intel-IA64-Filler
+pub const EMARCH_ENC_I17_IMM9D_INST_WORD_X: u16 = 3;
+/// Intel-IA64-Filler
+pub const EMARCH_ENC_I17_IMM9D_SIZE_X: u16 = 9;
+/// Intel-IA64-Filler
+pub const EMARCH_ENC_I17_IMM9D_INST_WORD_POS_X: u16 = 18;
+/// Intel-IA64-Filler
+pub const EMARCH_ENC_I17_IMM9D_VAL_POS_X: u16 = 7;
+
+/// Intel-IA64-Filler
+pub const EMARCH_ENC_I17_IMM5C_INST_WORD_X: u16 = 3;
+/// Intel-IA64-Filler
+pub const EMARCH_ENC_I17_IMM5C_SIZE_X: u16 = 5;
+/// Intel-IA64-Filler
+pub const EMARCH_ENC_I17_IMM5C_INST_WORD_POS_X: u16 = 13;
+/// Intel-IA64-Filler
+pub const EMARCH_ENC_I17_IMM5C_VAL_POS_X: u16 = 16;
+
+/// Intel-IA64-Filler
+pub const EMARCH_ENC_I17_IC_INST_WORD_X: u16 = 3;
+/// Intel-IA64-Filler
+pub const EMARCH_ENC_I17_IC_SIZE_X: u16 = 1;
+/// Intel-IA64-Filler
+pub const EMARCH_ENC_I17_IC_INST_WORD_POS_X: u16 = 12;
+/// Intel-IA64-Filler
+pub const EMARCH_ENC_I17_IC_VAL_POS_X: u16 = 21;
+
+/// Intel-IA64-Filler
+pub const EMARCH_ENC_I17_IMM41A_INST_WORD_X: u16 = 1;
+/// Intel-IA64-Filler
+pub const EMARCH_ENC_I17_IMM41A_SIZE_X: u16 = 10;
+/// Intel-IA64-Filler
+pub const EMARCH_ENC_I17_IMM41A_INST_WORD_POS_X: u16 = 14;
+/// Intel-IA64-Filler
+pub const EMARCH_ENC_I17_IMM41A_VAL_POS_X: u16 = 22;
+
+/// Intel-IA64-Filler
+pub const EMARCH_ENC_I17_IMM41B_INST_WORD_X: u16 = 1;
+/// Intel-IA64-Filler
+pub const EMARCH_ENC_I17_IMM41B_SIZE_X: u16 = 8;
+/// Intel-IA64-Filler
+pub const EMARCH_ENC_I17_IMM41B_INST_WORD_POS_X: u16 = 24;
+/// Intel-IA64-Filler
+pub const EMARCH_ENC_I17_IMM41B_VAL_POS_X: u16 = 32;
+
+/// Intel-IA64-Filler
+pub const EMARCH_ENC_I17_IMM41C_INST_WORD_X: u16 = 2;
+/// Intel-IA64-Filler
+pub const EMARCH_ENC_I17_IMM41C_SIZE_X: u16 = 23;
+/// Intel-IA64-Filler
+pub const EMARCH_ENC_I17_IMM41C_INST_WORD_POS_X: u16 = 0;
+/// Intel-IA64-Filler
+pub const EMARCH_ENC_I17_IMM41C_VAL_POS_X: u16 = 40;
+
+/// Intel-IA64-Filler
+pub const EMARCH_ENC_I17_SIGN_INST_WORD_X: u16 = 3;
+/// Intel-IA64-Filler
+pub const EMARCH_ENC_I17_SIGN_SIZE_X: u16 = 1;
+/// Intel-IA64-Filler
+pub const EMARCH_ENC_I17_SIGN_INST_WORD_POS_X: u16 = 27;
+/// Intel-IA64-Filler
+pub const EMARCH_ENC_I17_SIGN_VAL_POS_X: u16 = 63;
+
+/// Intel-IA64-Filler
+pub const X3_OPCODE_INST_WORD_X: u16 = 3;
+/// Intel-IA64-Filler
+pub const X3_OPCODE_SIZE_X: u16 = 4;
+/// Intel-IA64-Filler
+pub const X3_OPCODE_INST_WORD_POS_X: u16 = 28;
+/// Intel-IA64-Filler
+pub const X3_OPCODE_SIGN_VAL_POS_X: u16 = 0;
+
+/// Intel-IA64-Filler
+pub const X3_I_INST_WORD_X: u16 = 3;
+/// Intel-IA64-Filler
+pub const X3_I_SIZE_X: u16 = 1;
+/// Intel-IA64-Filler
+pub const X3_I_INST_WORD_POS_X: u16 = 27;
+/// Intel-IA64-Filler
+pub const X3_I_SIGN_VAL_POS_X: u16 = 59;
+
+/// Intel-IA64-Filler
+pub const X3_D_WH_INST_WORD_X: u16 = 3;
+/// Intel-IA64-Filler
+pub const X3_D_WH_SIZE_X: u16 = 3;
+/// Intel-IA64-Filler
+pub const X3_D_WH_INST_WORD_POS_X: u16 = 24;
+/// Intel-IA64-Filler
+pub const X3_D_WH_SIGN_VAL_POS_X: u16 = 0;
+
+/// Intel-IA64-Filler
+pub const X3_IMM20_INST_WORD_X: u16 = 3;
+/// Intel-IA64-Filler
+pub const X3_IMM20_SIZE_X: u16 = 20;
+/// Intel-IA64-Filler
+pub const X3_IMM20_INST_WORD_POS_X: u16 = 4;
+/// Intel-IA64-Filler
+pub const X3_IMM20_SIGN_VAL_POS_X: u16 = 0;
+
+/// Intel-IA64-Filler
+pub const X3_IMM39_1_INST_WORD_X: u16 = 2;
+/// Intel-IA64-Filler
+pub const X3_IMM39_1_SIZE_X: u16 = 23;
+/// Intel-IA64-Filler
+pub const X3_IMM39_1_INST_WORD_POS_X: u16 = 0;
+/// Intel-IA64-Filler
+pub const X3_IMM39_1_SIGN_VAL_POS_X: u16 = 36;
+
+/// Intel-IA64-Filler
+pub const X3_IMM39_2_INST_WORD_X: u16 = 1;
+/// Intel-IA64-Filler
+pub const X3_IMM39_2_SIZE_X: u16 = 16;
+/// Intel-IA64-Filler
+pub const X3_IMM39_2_INST_WORD_POS_X: u16 = 16;
+/// Intel-IA64-Filler
+pub const X3_IMM39_2_SIGN_VAL_POS_X: u16 = 20;
+
+/// Intel-IA64-Filler
+pub const X3_P_INST_WORD_X: u16 = 3;
+/// Intel-IA64-Filler
+pub const X3_P_SIZE_X: u16 = 4;
+/// Intel-IA64-Filler
+pub const X3_P_INST_WORD_POS_X: u16 = 0;
+/// Intel-IA64-Filler
+pub const X3_P_SIGN_VAL_POS_X: u16 = 0;
+
+/// Intel-IA64-Filler
+pub const X3_TMPLT_INST_WORD_X: u16 = 0;
+/// Intel-IA64-Filler
+pub const X3_TMPLT_SIZE_X: u16 = 4;
+/// Intel-IA64-Filler
+pub const X3_TMPLT_INST_WORD_POS_X: u16 = 0;
+/// Intel-IA64-Filler
+pub const X3_TMPLT_SIGN_VAL_POS_X: u16 = 0;
+
+/// Intel-IA64-Filler
+pub const X3_BTYPE_QP_INST_WORD_X: u16 = 2;
+/// Intel-IA64-Filler
+pub const X3_BTYPE_QP_SIZE_X: u16 = 9;
+/// Intel-IA64-Filler
+pub const X3_BTYPE_QP_INST_WORD_POS_X: u16 = 23;
+/// Intel-IA64-Filler
+pub const X3_BTYPE_QP_INST_VAL_POS_X: u16 = 0;
+
+/// Intel-IA64-Filler
+pub const X3_EMPTY_INST_WORD_X: u16 = 1;
+/// Intel-IA64-Filler
+pub const X3_EMPTY_SIZE_X: u16 = 2;
+/// Intel-IA64-Filler
+pub const X3_EMPTY_INST_WORD_POS_X: u16 = 14;
+/// Intel-IA64-Filler
+pub const X3_EMPTY_INST_VAL_POS_X: u16 = 0;
+
+//
+// Line number format.
+//
+
+// This struct has alignment 1.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageLinenumber {
+    /// Symbol table index of function name if Linenumber is 0.
+    /// Otherwise virtual address of line number.
+    pub symbol_table_index_or_virtual_address: U32Bytes<LE>,
+    /// Line number.
+    pub linenumber: U16Bytes<LE>,
+}
+
+//
+// Based relocation format.
+//
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageBaseRelocation {
+    pub virtual_address: U32<LE>,
+    pub size_of_block: U32<LE>,
+    //  pub type_offset[1]: U16<LE>,
+}
+
+//
+// Based relocation types.
+//
+
+pub const IMAGE_REL_BASED_ABSOLUTE: u16 = 0;
+pub const IMAGE_REL_BASED_HIGH: u16 = 1;
+pub const IMAGE_REL_BASED_LOW: u16 = 2;
+pub const IMAGE_REL_BASED_HIGHLOW: u16 = 3;
+pub const IMAGE_REL_BASED_HIGHADJ: u16 = 4;
+pub const IMAGE_REL_BASED_MACHINE_SPECIFIC_5: u16 = 5;
+pub const IMAGE_REL_BASED_RESERVED: u16 = 6;
+pub const IMAGE_REL_BASED_MACHINE_SPECIFIC_7: u16 = 7;
+pub const IMAGE_REL_BASED_MACHINE_SPECIFIC_8: u16 = 8;
+pub const IMAGE_REL_BASED_MACHINE_SPECIFIC_9: u16 = 9;
+pub const IMAGE_REL_BASED_DIR64: u16 = 10;
+
+//
+// Platform-specific based relocation types.
+//
+
+pub const IMAGE_REL_BASED_IA64_IMM64: u16 = 9;
+
+pub const IMAGE_REL_BASED_MIPS_JMPADDR: u16 = 5;
+pub const IMAGE_REL_BASED_MIPS_JMPADDR16: u16 = 9;
+
+pub const IMAGE_REL_BASED_ARM_MOV32: u16 = 5;
+pub const IMAGE_REL_BASED_THUMB_MOV32: u16 = 7;
+
+pub const IMAGE_REL_BASED_RISCV_HIGH20: u16 = 5;
+pub const IMAGE_REL_BASED_RISCV_LOW12I: u16 = 7;
+pub const IMAGE_REL_BASED_RISCV_LOW12S: u16 = 8;
+
+//
+// Archive format.
+//
+
+pub const IMAGE_ARCHIVE_START_SIZE: usize = 8;
+pub const IMAGE_ARCHIVE_START: &[u8; 8] = b"!<arch>\n";
+pub const IMAGE_ARCHIVE_END: &[u8] = b"`\n";
+pub const IMAGE_ARCHIVE_PAD: &[u8] = b"\n";
+pub const IMAGE_ARCHIVE_LINKER_MEMBER: &[u8; 16] = b"/               ";
+pub const IMAGE_ARCHIVE_LONGNAMES_MEMBER: &[u8; 16] = b"//              ";
+pub const IMAGE_ARCHIVE_HYBRIDMAP_MEMBER: &[u8; 16] = b"/<HYBRIDMAP>/   ";
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageArchiveMemberHeader {
+    /// File member name - `/' terminated.
+    pub name: [u8; 16],
+    /// File member date - decimal.
+    pub date: [u8; 12],
+    /// File member user id - decimal.
+    pub user_id: [u8; 6],
+    /// File member group id - decimal.
+    pub group_id: [u8; 6],
+    /// File member mode - octal.
+    pub mode: [u8; 8],
+    /// File member size - decimal.
+    pub size: [u8; 10],
+    /// String to end header.
+    pub end_header: [u8; 2],
+}
+
+pub const IMAGE_SIZEOF_ARCHIVE_MEMBER_HDR: u16 = 60;
+
+//
+// DLL support.
+//
+
+//
+// Export Format
+//
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageExportDirectory {
+    pub characteristics: U32<LE>,
+    pub time_date_stamp: U32<LE>,
+    pub major_version: U16<LE>,
+    pub minor_version: U16<LE>,
+    pub name: U32<LE>,
+    pub base: U32<LE>,
+    pub number_of_functions: U32<LE>,
+    pub number_of_names: U32<LE>,
+    /// RVA from base of image
+    pub address_of_functions: U32<LE>,
+    /// RVA from base of image
+    pub address_of_names: U32<LE>,
+    /// RVA from base of image
+    pub address_of_name_ordinals: U32<LE>,
+}
+
+//
+// Import Format
+//
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageImportByName {
+    pub hint: U16<LE>,
+    //pub name: [i8; 1],
+}
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageThunkData64(pub U64<LE>);
+/*
+    union {
+/// PBYTE
+        pub forwarder_string: U64<LE>,
+/// PDWORD
+        pub function: U64<LE>,
+        pub ordinal: U64<LE>,
+/// PIMAGE_IMPORT_BY_NAME
+        pub address_of_data: U64<LE>,
+    } u1;
+*/
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageThunkData32(pub U32<LE>);
+/*
+    union {
+/// PBYTE
+        pub forwarder_string: U32<LE>,
+/// PDWORD
+        pub function: U32<LE>,
+        pub ordinal: U32<LE>,
+/// PIMAGE_IMPORT_BY_NAME
+        pub address_of_data: U32<LE>,
+    } u1;
+}
+*/
+
+pub const IMAGE_ORDINAL_FLAG64: u64 = 0x8000000000000000;
+pub const IMAGE_ORDINAL_FLAG32: u32 = 0x80000000;
+
+/*
+#define IMAGE_ORDINAL64(Ordinal) (Ordinal & 0xffff)
+#define IMAGE_ORDINAL32(Ordinal) (Ordinal & 0xffff)
+#define IMAGE_SNAP_BY_ORDINAL64(Ordinal) ((Ordinal & IMAGE_ORDINAL_FLAG64) != 0)
+#define IMAGE_SNAP_BY_ORDINAL32(Ordinal) ((Ordinal & IMAGE_ORDINAL_FLAG32) != 0)
+
+*/
+
+//
+// Thread Local Storage
+//
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageTlsDirectory64 {
+    pub start_address_of_raw_data: U64<LE>,
+    pub end_address_of_raw_data: U64<LE>,
+    /// PDWORD
+    pub address_of_index: U64<LE>,
+    /// PIMAGE_TLS_CALLBACK *;
+    pub address_of_call_backs: U64<LE>,
+    pub size_of_zero_fill: U32<LE>,
+    pub characteristics: U32<LE>,
+}
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageTlsDirectory32 {
+    pub start_address_of_raw_data: U32<LE>,
+    pub end_address_of_raw_data: U32<LE>,
+    /// PDWORD
+    pub address_of_index: U32<LE>,
+    /// PIMAGE_TLS_CALLBACK *
+    pub address_of_call_backs: U32<LE>,
+    pub size_of_zero_fill: U32<LE>,
+    pub characteristics: U32<LE>,
+}
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageImportDescriptor {
+    /// RVA to original unbound IAT (`ImageThunkData32`/`ImageThunkData64`)
+    /// 0 for terminating null import descriptor
+    pub original_first_thunk: U32Bytes<LE>,
+    /// 0 if not bound,
+    /// -1 if bound, and real date\time stamp
+    ///     in IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT (new BIND)
+    /// O.W. date/time stamp of DLL bound to (Old BIND)
+    pub time_date_stamp: U32Bytes<LE>,
+    /// -1 if no forwarders
+    pub forwarder_chain: U32Bytes<LE>,
+    pub name: U32Bytes<LE>,
+    /// RVA to IAT (if bound this IAT has actual addresses)
+    pub first_thunk: U32Bytes<LE>,
+}
+
+impl ImageImportDescriptor {
+    /// Tell whether this import descriptor is the null descriptor
+    /// (used to mark the end of the iterator array in a PE)
+    pub fn is_null(&self) -> bool {
+        self.original_first_thunk.get(LE) == 0
+            && self.time_date_stamp.get(LE) == 0
+            && self.forwarder_chain.get(LE) == 0
+            && self.name.get(LE) == 0
+            && self.first_thunk.get(LE) == 0
+    }
+}
+
+//
+// New format import descriptors pointed to by DataDirectory[ IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT ]
+//
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageBoundImportDescriptor {
+    pub time_date_stamp: U32<LE>,
+    pub offset_module_name: U16<LE>,
+    pub number_of_module_forwarder_refs: U16<LE>,
+    // Array of zero or more IMAGE_BOUND_FORWARDER_REF follows
+}
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageBoundForwarderRef {
+    pub time_date_stamp: U32<LE>,
+    pub offset_module_name: U16<LE>,
+    pub reserved: U16<LE>,
+}
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageDelayloadDescriptor {
+    pub attributes: U32<LE>,
+
+    /// RVA to the name of the target library (NULL-terminate ASCII string)
+    pub dll_name_rva: U32<LE>,
+    /// RVA to the HMODULE caching location (PHMODULE)
+    pub module_handle_rva: U32<LE>,
+    /// RVA to the start of the IAT (PIMAGE_THUNK_DATA)
+    pub import_address_table_rva: U32<LE>,
+    /// RVA to the start of the name table (PIMAGE_THUNK_DATA::AddressOfData)
+    pub import_name_table_rva: U32<LE>,
+    /// RVA to an optional bound IAT
+    pub bound_import_address_table_rva: U32<LE>,
+    /// RVA to an optional unload info table
+    pub unload_information_table_rva: U32<LE>,
+    /// 0 if not bound, otherwise, date/time of the target DLL
+    pub time_date_stamp: U32<LE>,
+}
+
+impl ImageDelayloadDescriptor {
+    /// Tell whether this delay-load import descriptor is the null descriptor
+    /// (used to mark the end of the iterator array in a PE)
+    pub fn is_null(&self) -> bool {
+        self.attributes.get(LE) == 0
+            && self.dll_name_rva.get(LE) == 0
+            && self.module_handle_rva.get(LE) == 0
+            && self.import_address_table_rva.get(LE) == 0
+            && self.import_name_table_rva.get(LE) == 0
+            && self.bound_import_address_table_rva.get(LE) == 0
+            && self.unload_information_table_rva.get(LE) == 0
+            && self.time_date_stamp.get(LE) == 0
+    }
+}
+
+/// Delay load version 2 flag for `ImageDelayloadDescriptor::attributes`.
+pub const IMAGE_DELAYLOAD_RVA_BASED: u32 = 0x8000_0000;
+
+//
+// Resource Format.
+//
+
+//
+// Resource directory consists of two counts, following by a variable length
+// array of directory entries.  The first count is the number of entries at
+// beginning of the array that have actual names associated with each entry.
+// The entries are in ascending order, case insensitive strings.  The second
+// count is the number of entries that immediately follow the named entries.
+// This second count identifies the number of entries that have 16-bit integer
+// Ids as their name.  These entries are also sorted in ascending order.
+//
+// This structure allows fast lookup by either name or number, but for any
+// given resource entry only one form of lookup is supported, not both.
+// This is consistant with the syntax of the .RC file and the .RES file.
+//
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageResourceDirectory {
+    pub characteristics: U32<LE>,
+    pub time_date_stamp: U32<LE>,
+    pub major_version: U16<LE>,
+    pub minor_version: U16<LE>,
+    pub number_of_named_entries: U16<LE>,
+    pub number_of_id_entries: U16<LE>,
+}
+
+pub const IMAGE_RESOURCE_NAME_IS_STRING: u32 = 0x8000_0000;
+pub const IMAGE_RESOURCE_DATA_IS_DIRECTORY: u32 = 0x8000_0000;
+//
+// Each directory contains the 32-bit Name of the entry and an offset,
+// relative to the beginning of the resource directory of the data associated
+// with this directory entry.  If the name of the entry is an actual text
+// string instead of an integer Id, then the high order bit of the name field
+// is set to one and the low order 31-bits are an offset, relative to the
+// beginning of the resource directory of the string, which is of type
+// IMAGE_RESOURCE_DIRECTORY_STRING.  Otherwise the high bit is clear and the
+// low-order 16-bits are the integer Id that identify this resource directory
+// entry. If the directory entry is yet another resource directory (i.e. a
+// subdirectory), then the high order bit of the offset field will be
+// set to indicate this.  Otherwise the high bit is clear and the offset
+// field points to a resource data entry.
+//
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageResourceDirectoryEntry {
+    pub name_or_id: U32<LE>,
+    pub offset_to_data_or_directory: U32<LE>,
+}
+
+//
+// For resource directory entries that have actual string names, the Name
+// field of the directory entry points to an object of the following type.
+// All of these string objects are stored together after the last resource
+// directory entry and before the first resource data object.  This minimizes
+// the impact of these variable length objects on the alignment of the fixed
+// size directory entry objects.
+//
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageResourceDirectoryString {
+    pub length: U16<LE>,
+    //pub name_string: [i8; 1],
+}
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageResourceDirStringU {
+    pub length: U16<LE>,
+    //pub name_string: [U16<LE>; 1],
+}
+
+//
+// Each resource data entry describes a leaf node in the resource directory
+// tree.  It contains an offset, relative to the beginning of the resource
+// directory of the data for the resource, a size field that gives the number
+// of bytes of data at that offset, a CodePage that should be used when
+// decoding code point values within the resource data.  Typically for new
+// applications the code page would be the unicode code page.
+//
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageResourceDataEntry {
+    /// RVA of the data.
+    pub offset_to_data: U32<LE>,
+    pub size: U32<LE>,
+    pub code_page: U32<LE>,
+    pub reserved: U32<LE>,
+}
+
+// Resource type: https://docs.microsoft.com/en-us/windows/win32/menurc/resource-types
+
+/// ID for: Hardware-dependent cursor resource.
+pub const RT_CURSOR: u16 = 1;
+/// ID for: Bitmap resource.
+pub const RT_BITMAP: u16 = 2;
+/// ID for: Hardware-dependent icon resource.
+pub const RT_ICON: u16 = 3;
+/// ID for: Menu resource.
+pub const RT_MENU: u16 = 4;
+/// ID for: Dialog box.
+pub const RT_DIALOG: u16 = 5;
+/// ID for: String-table entry.
+pub const RT_STRING: u16 = 6;
+/// ID for: Font directory resource.
+pub const RT_FONTDIR: u16 = 7;
+/// ID for: Font resource.
+pub const RT_FONT: u16 = 8;
+/// ID for: Accelerator table.
+pub const RT_ACCELERATOR: u16 = 9;
+/// ID for: Application-defined resource (raw data).
+pub const RT_RCDATA: u16 = 10;
+/// ID for: Message-table entry.
+pub const RT_MESSAGETABLE: u16 = 11;
+/// ID for: Hardware-independent cursor resource.
+pub const RT_GROUP_CURSOR: u16 = 12;
+/// ID for: Hardware-independent icon resource.
+pub const RT_GROUP_ICON: u16 = 14;
+/// ID for: Version resource.
+pub const RT_VERSION: u16 = 16;
+/// ID for: Allows a resource editing tool to associate a string with an .rc file.
+pub const RT_DLGINCLUDE: u16 = 17;
+/// ID for: Plug and Play resource.
+pub const RT_PLUGPLAY: u16 = 19;
+/// ID for: VXD.
+pub const RT_VXD: u16 = 20;
+/// ID for: Animated cursor.
+pub const RT_ANICURSOR: u16 = 21;
+/// ID for: Animated icon.
+pub const RT_ANIICON: u16 = 22;
+/// ID for: HTML resource.
+pub const RT_HTML: u16 = 23;
+/// ID for: Side-by-Side Assembly Manifest.
+pub const RT_MANIFEST: u16 = 24;
+
+//
+// Code Integrity in loadconfig (CI)
+//
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageLoadConfigCodeIntegrity {
+    /// Flags to indicate if CI information is available, etc.
+    pub flags: U16<LE>,
+    /// 0xFFFF means not available
+    pub catalog: U16<LE>,
+    pub catalog_offset: U32<LE>,
+    /// Additional bitmask to be defined later
+    pub reserved: U32<LE>,
+}
+
+//
+// Dynamic value relocation table in loadconfig
+//
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageDynamicRelocationTable {
+    pub version: U32<LE>,
+    pub size: U32<LE>,
+    // DynamicRelocations: [ImageDynamicRelocation; 0],
+}
+
+//
+// Dynamic value relocation entries following IMAGE_DYNAMIC_RELOCATION_TABLE
+//
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageDynamicRelocation32 {
+    pub symbol: U32<LE>,
+    pub base_reloc_size: U32<LE>,
+    // BaseRelocations: [ImageBaseRelocation; 0],
+}
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageDynamicRelocation64 {
+    pub symbol: U64<LE>,
+    pub base_reloc_size: U32<LE>,
+    // BaseRelocations: [ImageBaseRelocation; 0],
+}
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageDynamicRelocation32V2 {
+    pub header_size: U32<LE>,
+    pub fixup_info_size: U32<LE>,
+    pub symbol: U32<LE>,
+    pub symbol_group: U32<LE>,
+    pub flags: U32<LE>,
+    // ...     variable length header fields
+    // pub     fixup_info: [u8; fixup_info_size]
+}
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageDynamicRelocation64V2 {
+    pub header_size: U32<LE>,
+    pub fixup_info_size: U32<LE>,
+    pub symbol: U64<LE>,
+    pub symbol_group: U32<LE>,
+    pub flags: U32<LE>,
+    // ...     variable length header fields
+    // pub     fixup_info[u8; fixup_info_size]
+}
+
+//
+// Defined symbolic dynamic relocation entries.
+//
+
+pub const IMAGE_DYNAMIC_RELOCATION_GUARD_RF_PROLOGUE: u32 = 0x0000_0001;
+pub const IMAGE_DYNAMIC_RELOCATION_GUARD_RF_EPILOGUE: u32 = 0x0000_0002;
+pub const IMAGE_DYNAMIC_RELOCATION_GUARD_IMPORT_CONTROL_TRANSFER: u32 = 0x0000_0003;
+pub const IMAGE_DYNAMIC_RELOCATION_GUARD_INDIR_CONTROL_TRANSFER: u32 = 0x0000_0004;
+pub const IMAGE_DYNAMIC_RELOCATION_GUARD_SWITCHTABLE_BRANCH: u32 = 0x0000_0005;
+
+// This struct has alignment 1.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImagePrologueDynamicRelocationHeader {
+    pub prologue_byte_count: u8,
+    // pub prologue_bytes: [u8; prologue_byte_count],
+}
+
+// This struct has alignment 1.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageEpilogueDynamicRelocationHeader {
+    pub epilogue_count: U32Bytes<LE>,
+    pub epilogue_byte_count: u8,
+    pub branch_descriptor_element_size: u8,
+    pub branch_descriptor_count: U16Bytes<LE>,
+    // pub branch_descriptors[...],
+    // pub branch_descriptor_bit_map[...],
+}
+
+/*
+// TODO? bitfields
+// TODO: unaligned?
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageImportControlTransferDynamicRelocation {
+    DWORD       PageRelativeOffset : 12;
+    DWORD       IndirectCall       : 1;
+    DWORD       IATIndex           : 19;
+}
+
+// TODO: unaligned?
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageIndirControlTransferDynamicRelocation {
+    WORD        PageRelativeOffset : 12;
+    WORD        IndirectCall       : 1;
+    WORD        RexWPrefix         : 1;
+    WORD        CfgCheck           : 1;
+    WORD        Reserved           : 1;
+}
+
+// TODO: unaligned?
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageSwitchtableBranchDynamicRelocation {
+    WORD        PageRelativeOffset : 12;
+    WORD        RegisterNumber     : 4;
+}
+*/
+
+//
+// Load Configuration Directory Entry
+//
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageLoadConfigDirectory32 {
+    pub size: U32<LE>,
+    pub time_date_stamp: U32<LE>,
+    pub major_version: U16<LE>,
+    pub minor_version: U16<LE>,
+    pub global_flags_clear: U32<LE>,
+    pub global_flags_set: U32<LE>,
+    pub critical_section_default_timeout: U32<LE>,
+    pub de_commit_free_block_threshold: U32<LE>,
+    pub de_commit_total_free_threshold: U32<LE>,
+    /// VA
+    pub lock_prefix_table: U32<LE>,
+    pub maximum_allocation_size: U32<LE>,
+    pub virtual_memory_threshold: U32<LE>,
+    pub process_heap_flags: U32<LE>,
+    pub process_affinity_mask: U32<LE>,
+    pub csd_version: U16<LE>,
+    pub dependent_load_flags: U16<LE>,
+    /// VA
+    pub edit_list: U32<LE>,
+    /// VA
+    pub security_cookie: U32<LE>,
+    /// VA
+    pub sehandler_table: U32<LE>,
+    pub sehandler_count: U32<LE>,
+    /// VA
+    pub guard_cf_check_function_pointer: U32<LE>,
+    /// VA
+    pub guard_cf_dispatch_function_pointer: U32<LE>,
+    /// VA
+    pub guard_cf_function_table: U32<LE>,
+    pub guard_cf_function_count: U32<LE>,
+    pub guard_flags: U32<LE>,
+    pub code_integrity: ImageLoadConfigCodeIntegrity,
+    /// VA
+    pub guard_address_taken_iat_entry_table: U32<LE>,
+    pub guard_address_taken_iat_entry_count: U32<LE>,
+    /// VA
+    pub guard_long_jump_target_table: U32<LE>,
+    pub guard_long_jump_target_count: U32<LE>,
+    /// VA
+    pub dynamic_value_reloc_table: U32<LE>,
+    pub chpe_metadata_pointer: U32<LE>,
+    /// VA
+    pub guard_rf_failure_routine: U32<LE>,
+    /// VA
+    pub guard_rf_failure_routine_function_pointer: U32<LE>,
+    pub dynamic_value_reloc_table_offset: U32<LE>,
+    pub dynamic_value_reloc_table_section: U16<LE>,
+    pub reserved2: U16<LE>,
+    /// VA
+    pub guard_rf_verify_stack_pointer_function_pointer: U32<LE>,
+    pub hot_patch_table_offset: U32<LE>,
+    pub reserved3: U32<LE>,
+    /// VA
+    pub enclave_configuration_pointer: U32<LE>,
+    /// VA
+    pub volatile_metadata_pointer: U32<LE>,
+}
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageLoadConfigDirectory64 {
+    pub size: U32<LE>,
+    pub time_date_stamp: U32<LE>,
+    pub major_version: U16<LE>,
+    pub minor_version: U16<LE>,
+    pub global_flags_clear: U32<LE>,
+    pub global_flags_set: U32<LE>,
+    pub critical_section_default_timeout: U32<LE>,
+    pub de_commit_free_block_threshold: U64<LE>,
+    pub de_commit_total_free_threshold: U64<LE>,
+    /// VA
+    pub lock_prefix_table: U64<LE>,
+    pub maximum_allocation_size: U64<LE>,
+    pub virtual_memory_threshold: U64<LE>,
+    pub process_affinity_mask: U64<LE>,
+    pub process_heap_flags: U32<LE>,
+    pub csd_version: U16<LE>,
+    pub dependent_load_flags: U16<LE>,
+    /// VA
+    pub edit_list: U64<LE>,
+    /// VA
+    pub security_cookie: U64<LE>,
+    /// VA
+    pub sehandler_table: U64<LE>,
+    pub sehandler_count: U64<LE>,
+    /// VA
+    pub guard_cf_check_function_pointer: U64<LE>,
+    /// VA
+    pub guard_cf_dispatch_function_pointer: U64<LE>,
+    /// VA
+    pub guard_cf_function_table: U64<LE>,
+    pub guard_cf_function_count: U64<LE>,
+    pub guard_flags: U32<LE>,
+    pub code_integrity: ImageLoadConfigCodeIntegrity,
+    /// VA
+    pub guard_address_taken_iat_entry_table: U64<LE>,
+    pub guard_address_taken_iat_entry_count: U64<LE>,
+    /// VA
+    pub guard_long_jump_target_table: U64<LE>,
+    pub guard_long_jump_target_count: U64<LE>,
+    /// VA
+    pub dynamic_value_reloc_table: U64<LE>,
+    /// VA
+    pub chpe_metadata_pointer: U64<LE>,
+    /// VA
+    pub guard_rf_failure_routine: U64<LE>,
+    /// VA
+    pub guard_rf_failure_routine_function_pointer: U64<LE>,
+    pub dynamic_value_reloc_table_offset: U32<LE>,
+    pub dynamic_value_reloc_table_section: U16<LE>,
+    pub reserved2: U16<LE>,
+    /// VA
+    pub guard_rf_verify_stack_pointer_function_pointer: U64<LE>,
+    pub hot_patch_table_offset: U32<LE>,
+    pub reserved3: U32<LE>,
+    /// VA
+    pub enclave_configuration_pointer: U64<LE>,
+    /// VA
+    pub volatile_metadata_pointer: U64<LE>,
+}
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageHotPatchInfo {
+    pub version: U32<LE>,
+    pub size: U32<LE>,
+    pub sequence_number: U32<LE>,
+    pub base_image_list: U32<LE>,
+    pub base_image_count: U32<LE>,
+    /// Version 2 and later
+    pub buffer_offset: U32<LE>,
+    /// Version 3 and later
+    pub extra_patch_size: U32<LE>,
+}
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageHotPatchBase {
+    pub sequence_number: U32<LE>,
+    pub flags: U32<LE>,
+    pub original_time_date_stamp: U32<LE>,
+    pub original_check_sum: U32<LE>,
+    pub code_integrity_info: U32<LE>,
+    pub code_integrity_size: U32<LE>,
+    pub patch_table: U32<LE>,
+    /// Version 2 and later
+    pub buffer_offset: U32<LE>,
+}
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageHotPatchHashes {
+    pub sha256: [u8; 32],
+    pub sha1: [u8; 20],
+}
+
+pub const IMAGE_HOT_PATCH_BASE_OBLIGATORY: u32 = 0x0000_0001;
+pub const IMAGE_HOT_PATCH_BASE_CAN_ROLL_BACK: u32 = 0x0000_0002;
+
+pub const IMAGE_HOT_PATCH_CHUNK_INVERSE: u32 = 0x8000_0000;
+pub const IMAGE_HOT_PATCH_CHUNK_OBLIGATORY: u32 = 0x4000_0000;
+pub const IMAGE_HOT_PATCH_CHUNK_RESERVED: u32 = 0x3FF0_3000;
+pub const IMAGE_HOT_PATCH_CHUNK_TYPE: u32 = 0x000F_C000;
+pub const IMAGE_HOT_PATCH_CHUNK_SOURCE_RVA: u32 = 0x0000_8000;
+pub const IMAGE_HOT_PATCH_CHUNK_TARGET_RVA: u32 = 0x0000_4000;
+pub const IMAGE_HOT_PATCH_CHUNK_SIZE: u32 = 0x0000_0FFF;
+
+pub const IMAGE_HOT_PATCH_NONE: u32 = 0x0000_0000;
+pub const IMAGE_HOT_PATCH_FUNCTION: u32 = 0x0001_C000;
+pub const IMAGE_HOT_PATCH_ABSOLUTE: u32 = 0x0002_C000;
+pub const IMAGE_HOT_PATCH_REL32: u32 = 0x0003_C000;
+pub const IMAGE_HOT_PATCH_CALL_TARGET: u32 = 0x0004_4000;
+pub const IMAGE_HOT_PATCH_INDIRECT: u32 = 0x0005_C000;
+pub const IMAGE_HOT_PATCH_NO_CALL_TARGET: u32 = 0x0006_4000;
+pub const IMAGE_HOT_PATCH_DYNAMIC_VALUE: u32 = 0x0007_8000;
+
+/// Module performs control flow integrity checks using system-supplied support
+pub const IMAGE_GUARD_CF_INSTRUMENTED: u32 = 0x0000_0100;
+/// Module performs control flow and write integrity checks
+pub const IMAGE_GUARD_CFW_INSTRUMENTED: u32 = 0x0000_0200;
+/// Module contains valid control flow target metadata
+pub const IMAGE_GUARD_CF_FUNCTION_TABLE_PRESENT: u32 = 0x0000_0400;
+/// Module does not make use of the /GS security cookie
+pub const IMAGE_GUARD_SECURITY_COOKIE_UNUSED: u32 = 0x0000_0800;
+/// Module supports read only delay load IAT
+pub const IMAGE_GUARD_PROTECT_DELAYLOAD_IAT: u32 = 0x0000_1000;
+/// Delayload import table in its own .didat section (with nothing else in it) that can be freely reprotected
+pub const IMAGE_GUARD_DELAYLOAD_IAT_IN_ITS_OWN_SECTION: u32 = 0x0000_2000;
+/// Module contains suppressed export information.
+///
+/// This also infers that the address taken taken IAT table is also present in the load config.
+pub const IMAGE_GUARD_CF_EXPORT_SUPPRESSION_INFO_PRESENT: u32 = 0x0000_4000;
+/// Module enables suppression of exports
+pub const IMAGE_GUARD_CF_ENABLE_EXPORT_SUPPRESSION: u32 = 0x0000_8000;
+/// Module contains longjmp target information
+pub const IMAGE_GUARD_CF_LONGJUMP_TABLE_PRESENT: u32 = 0x0001_0000;
+/// Module contains return flow instrumentation and metadata
+pub const IMAGE_GUARD_RF_INSTRUMENTED: u32 = 0x0002_0000;
+/// Module requests that the OS enable return flow protection
+pub const IMAGE_GUARD_RF_ENABLE: u32 = 0x0004_0000;
+/// Module requests that the OS enable return flow protection in strict mode
+pub const IMAGE_GUARD_RF_STRICT: u32 = 0x0008_0000;
+/// Module was built with retpoline support
+pub const IMAGE_GUARD_RETPOLINE_PRESENT: u32 = 0x0010_0000;
+
+/// Stride of Guard CF function table encoded in these bits (additional count of bytes per element)
+pub const IMAGE_GUARD_CF_FUNCTION_TABLE_SIZE_MASK: u32 = 0xF000_0000;
+/// Shift to right-justify Guard CF function table stride
+pub const IMAGE_GUARD_CF_FUNCTION_TABLE_SIZE_SHIFT: u32 = 28;
+
+//
+// GFIDS table entry flags.
+//
+
+/// The containing GFID entry is suppressed
+pub const IMAGE_GUARD_FLAG_FID_SUPPRESSED: u16 = 0x01;
+/// The containing GFID entry is export suppressed
+pub const IMAGE_GUARD_FLAG_EXPORT_SUPPRESSED: u16 = 0x02;
+
+//
+// WIN CE Exception table format
+//
+
+//
+// Function table entry format.  Function table is pointed to by the
+// IMAGE_DIRECTORY_ENTRY_EXCEPTION directory entry.
+//
+
+/*
+// TODO? bitfields
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageCeRuntimeFunctionEntry {
+    pub func_start: U32<LE>,
+    DWORD PrologLen : 8;
+    DWORD FuncLen : 22;
+    DWORD ThirtyTwoBit : 1;
+    DWORD ExceptionFlag : 1;
+}
+*/
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageArmRuntimeFunctionEntry {
+    pub begin_address: U32<LE>,
+    pub unwind_data: U32<LE>,
+}
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageArm64RuntimeFunctionEntry {
+    pub begin_address: U32<LE>,
+    pub unwind_data: U32<LE>,
+}
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageAlpha64RuntimeFunctionEntry {
+    pub begin_address: U64<LE>,
+    pub end_address: U64<LE>,
+    pub exception_handler: U64<LE>,
+    pub handler_data: U64<LE>,
+    pub prolog_end_address: U64<LE>,
+}
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageAlphaRuntimeFunctionEntry {
+    pub begin_address: U32<LE>,
+    pub end_address: U32<LE>,
+    pub exception_handler: U32<LE>,
+    pub handler_data: U32<LE>,
+    pub prolog_end_address: U32<LE>,
+}
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageRuntimeFunctionEntry {
+    pub begin_address: U32<LE>,
+    pub end_address: U32<LE>,
+    pub unwind_info_address_or_data: U32<LE>,
+}
+
+//
+// Sofware enclave information
+//
+
+pub const IMAGE_ENCLAVE_LONG_ID_LENGTH: usize = 32;
+pub const IMAGE_ENCLAVE_SHORT_ID_LENGTH: usize = 16;
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageEnclaveConfig32 {
+    pub size: U32<LE>,
+    pub minimum_required_config_size: U32<LE>,
+    pub policy_flags: U32<LE>,
+    pub number_of_imports: U32<LE>,
+    pub import_list: U32<LE>,
+    pub import_entry_size: U32<LE>,
+    pub family_id: [u8; IMAGE_ENCLAVE_SHORT_ID_LENGTH],
+    pub image_id: [u8; IMAGE_ENCLAVE_SHORT_ID_LENGTH],
+    pub image_version: U32<LE>,
+    pub security_version: U32<LE>,
+    pub enclave_size: U32<LE>,
+    pub number_of_threads: U32<LE>,
+    pub enclave_flags: U32<LE>,
+}
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageEnclaveConfig64 {
+    pub size: U32<LE>,
+    pub minimum_required_config_size: U32<LE>,
+    pub policy_flags: U32<LE>,
+    pub number_of_imports: U32<LE>,
+    pub import_list: U32<LE>,
+    pub import_entry_size: U32<LE>,
+    pub family_id: [u8; IMAGE_ENCLAVE_SHORT_ID_LENGTH],
+    pub image_id: [u8; IMAGE_ENCLAVE_SHORT_ID_LENGTH],
+    pub image_version: U32<LE>,
+    pub security_version: U32<LE>,
+    pub enclave_size: U64<LE>,
+    pub number_of_threads: U32<LE>,
+    pub enclave_flags: U32<LE>,
+}
+
+//pub const IMAGE_ENCLAVE_MINIMUM_CONFIG_SIZE: usize = FIELD_OFFSET(IMAGE_ENCLAVE_CONFIG, EnclaveFlags);
+
+pub const IMAGE_ENCLAVE_POLICY_DEBUGGABLE: u32 = 0x0000_0001;
+
+pub const IMAGE_ENCLAVE_FLAG_PRIMARY_IMAGE: u32 = 0x0000_0001;
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageEnclaveImport {
+    pub match_type: U32<LE>,
+    pub minimum_security_version: U32<LE>,
+    pub unique_or_author_id: [u8; IMAGE_ENCLAVE_LONG_ID_LENGTH],
+    pub family_id: [u8; IMAGE_ENCLAVE_SHORT_ID_LENGTH],
+    pub image_id: [u8; IMAGE_ENCLAVE_SHORT_ID_LENGTH],
+    pub import_name: U32<LE>,
+    pub reserved: U32<LE>,
+}
+
+pub const IMAGE_ENCLAVE_IMPORT_MATCH_NONE: u32 = 0x0000_0000;
+pub const IMAGE_ENCLAVE_IMPORT_MATCH_UNIQUE_ID: u32 = 0x0000_0001;
+pub const IMAGE_ENCLAVE_IMPORT_MATCH_AUTHOR_ID: u32 = 0x0000_0002;
+pub const IMAGE_ENCLAVE_IMPORT_MATCH_FAMILY_ID: u32 = 0x0000_0003;
+pub const IMAGE_ENCLAVE_IMPORT_MATCH_IMAGE_ID: u32 = 0x0000_0004;
+
+//
+// Debug Format
+//
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageDebugDirectory {
+    pub characteristics: U32<LE>,
+    pub time_date_stamp: U32<LE>,
+    pub major_version: U16<LE>,
+    pub minor_version: U16<LE>,
+    pub typ: U32<LE>,
+    pub size_of_data: U32<LE>,
+    pub address_of_raw_data: U32<LE>,
+    pub pointer_to_raw_data: U32<LE>,
+}
+
+pub const IMAGE_DEBUG_TYPE_UNKNOWN: u32 = 0;
+pub const IMAGE_DEBUG_TYPE_COFF: u32 = 1;
+pub const IMAGE_DEBUG_TYPE_CODEVIEW: u32 = 2;
+pub const IMAGE_DEBUG_TYPE_FPO: u32 = 3;
+pub const IMAGE_DEBUG_TYPE_MISC: u32 = 4;
+pub const IMAGE_DEBUG_TYPE_EXCEPTION: u32 = 5;
+pub const IMAGE_DEBUG_TYPE_FIXUP: u32 = 6;
+pub const IMAGE_DEBUG_TYPE_OMAP_TO_SRC: u32 = 7;
+pub const IMAGE_DEBUG_TYPE_OMAP_FROM_SRC: u32 = 8;
+pub const IMAGE_DEBUG_TYPE_BORLAND: u32 = 9;
+pub const IMAGE_DEBUG_TYPE_RESERVED10: u32 = 10;
+pub const IMAGE_DEBUG_TYPE_CLSID: u32 = 11;
+pub const IMAGE_DEBUG_TYPE_VC_FEATURE: u32 = 12;
+pub const IMAGE_DEBUG_TYPE_POGO: u32 = 13;
+pub const IMAGE_DEBUG_TYPE_ILTCG: u32 = 14;
+pub const IMAGE_DEBUG_TYPE_MPX: u32 = 15;
+pub const IMAGE_DEBUG_TYPE_REPRO: u32 = 16;
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageCoffSymbolsHeader {
+    pub number_of_symbols: U32<LE>,
+    pub lva_to_first_symbol: U32<LE>,
+    pub number_of_linenumbers: U32<LE>,
+    pub lva_to_first_linenumber: U32<LE>,
+    pub rva_to_first_byte_of_code: U32<LE>,
+    pub rva_to_last_byte_of_code: U32<LE>,
+    pub rva_to_first_byte_of_data: U32<LE>,
+    pub rva_to_last_byte_of_data: U32<LE>,
+}
+
+pub const FRAME_FPO: u16 = 0;
+pub const FRAME_TRAP: u16 = 1;
+pub const FRAME_TSS: u16 = 2;
+pub const FRAME_NONFPO: u16 = 3;
+
+/*
+// TODO? bitfields
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct FpoData {
+/// offset 1st byte of function code
+    pub ul_off_start: U32<LE>,
+/// # bytes in function
+    pub cb_proc_size: U32<LE>,
+/// # bytes in locals/4
+    pub cdw_locals: U32<LE>,
+/// # bytes in params/4
+    pub cdw_params: U16<LE>,
+/// # bytes in prolog
+    WORD        cbProlog : 8;
+/// # regs saved
+    WORD        cbRegs   : 3;
+/// TRUE if SEH in func
+    WORD        fHasSEH  : 1;
+/// TRUE if EBP has been allocated
+    WORD        fUseBP   : 1;
+/// reserved for future use
+    WORD        reserved : 1;
+/// frame type
+    WORD        cbFrame  : 2;
+}
+pub const SIZEOF_RFPO_DATA: usize = 16;
+*/
+
+pub const IMAGE_DEBUG_MISC_EXENAME: u16 = 1;
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageDebugMisc {
+    /// type of misc data, see defines
+    pub data_type: U32<LE>,
+    /// total length of record, rounded to four byte multiple.
+    pub length: U32<LE>,
+    /// TRUE if data is unicode string
+    pub unicode: u8,
+    pub reserved: [u8; 3],
+    // Actual data
+    //pub data: [u8; 1],
+}
+
+//
+// Function table extracted from MIPS/ALPHA/IA64 images.  Does not contain
+// information needed only for runtime support.  Just those fields for
+// each entry needed by a debugger.
+//
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageFunctionEntry {
+    pub starting_address: U32<LE>,
+    pub ending_address: U32<LE>,
+    pub end_of_prologue: U32<LE>,
+}
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageFunctionEntry64 {
+    pub starting_address: U64<LE>,
+    pub ending_address: U64<LE>,
+    pub end_of_prologue_or_unwind_info_address: U64<LE>,
+}
+
+//
+// Debugging information can be stripped from an image file and placed
+// in a separate .DBG file, whose file name part is the same as the
+// image file name part (e.g. symbols for CMD.EXE could be stripped
+// and placed in CMD.DBG).  This is indicated by the IMAGE_FILE_DEBUG_STRIPPED
+// flag in the Characteristics field of the file header.  The beginning of
+// the .DBG file contains the following structure which captures certain
+// information from the image file.  This allows a debug to proceed even if
+// the original image file is not accessable.  This header is followed by
+// zero of more IMAGE_SECTION_HEADER structures, followed by zero or more
+// IMAGE_DEBUG_DIRECTORY structures.  The latter structures and those in
+// the image file contain file offsets relative to the beginning of the
+// .DBG file.
+//
+// If symbols have been stripped from an image, the IMAGE_DEBUG_MISC structure
+// is left in the image file, but not mapped.  This allows a debugger to
+// compute the name of the .DBG file, from the name of the image in the
+// IMAGE_DEBUG_MISC structure.
+//
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageSeparateDebugHeader {
+    pub signature: U16<LE>,
+    pub flags: U16<LE>,
+    pub machine: U16<LE>,
+    pub characteristics: U16<LE>,
+    pub time_date_stamp: U32<LE>,
+    pub check_sum: U32<LE>,
+    pub image_base: U32<LE>,
+    pub size_of_image: U32<LE>,
+    pub number_of_sections: U32<LE>,
+    pub exported_names_size: U32<LE>,
+    pub debug_directory_size: U32<LE>,
+    pub section_alignment: U32<LE>,
+    pub reserved: [U32<LE>; 2],
+}
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct NonPagedDebugInfo {
+    pub signature: U16<LE>,
+    pub flags: U16<LE>,
+    pub size: U32<LE>,
+    pub machine: U16<LE>,
+    pub characteristics: U16<LE>,
+    pub time_date_stamp: U32<LE>,
+    pub check_sum: U32<LE>,
+    pub size_of_image: U32<LE>,
+    pub image_base: U64<LE>,
+    //debug_directory_size
+    //ImageDebugDirectory
+}
+
+pub const IMAGE_SEPARATE_DEBUG_SIGNATURE: u16 = 0x4944;
+pub const NON_PAGED_DEBUG_SIGNATURE: u16 = 0x494E;
+
+pub const IMAGE_SEPARATE_DEBUG_FLAGS_MASK: u16 = 0x8000;
+/// when DBG was updated, the old checksum didn't match.
+pub const IMAGE_SEPARATE_DEBUG_MISMATCH: u16 = 0x8000;
+
+//
+//  The .arch section is made up of headers, each describing an amask position/value
+//  pointing to an array of IMAGE_ARCHITECTURE_ENTRY's.  Each "array" (both the header
+//  and entry arrays) are terminiated by a quadword of 0xffffffffL.
+//
+//  NOTE: There may be quadwords of 0 sprinkled around and must be skipped.
+//
+
+/*
+// TODO? bitfields
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageArchitectureHeader {
+    /// 1 -> code section depends on mask bit
+    /// 0 -> new instruction depends on mask bit
+    unsigned int AmaskValue: 1;
+    /// MBZ
+    int :7;
+    /// Amask bit in question for this fixup
+    unsigned int AmaskShift: 8;
+    /// MBZ
+    int :16;
+    /// RVA into .arch section to array of ARCHITECTURE_ENTRY's
+    pub first_entry_rva: U32<LE>,
+}
+*/
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageArchitectureEntry {
+    /// RVA of instruction to fixup
+    pub fixup_inst_rva: U32<LE>,
+    /// fixup instruction (see alphaops.h)
+    pub new_inst: U32<LE>,
+}
+
+// The following structure defines the new import object.  Note the values of the first two fields,
+// which must be set as stated in order to differentiate old and new import members.
+// Following this structure, the linker emits two null-terminated strings used to recreate the
+// import at the time of use.  The first string is the import's name, the second is the dll's name.
+
+pub const IMPORT_OBJECT_HDR_SIG2: u16 = 0xffff;
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImportObjectHeader {
+    /// Must be IMAGE_FILE_MACHINE_UNKNOWN
+    pub sig1: U16<LE>,
+    /// Must be IMPORT_OBJECT_HDR_SIG2.
+    pub sig2: U16<LE>,
+    pub version: U16<LE>,
+    pub machine: U16<LE>,
+    /// Time/date stamp
+    pub time_date_stamp: U32<LE>,
+    /// particularly useful for incremental links
+    pub size_of_data: U32<LE>,
+
+    /// if grf & IMPORT_OBJECT_ORDINAL
+    pub ordinal_or_hint: U16<LE>,
+
+    // WORD    Type : 2;
+    // WORD    NameType : 3;
+    // WORD    Reserved : 11;
+    pub name_type: U16<LE>,
+}
+
+pub const IMPORT_OBJECT_CODE: u16 = 0;
+pub const IMPORT_OBJECT_DATA: u16 = 1;
+pub const IMPORT_OBJECT_CONST: u16 = 2;
+
+/// Import by ordinal
+pub const IMPORT_OBJECT_ORDINAL: u16 = 0;
+/// Import name == public symbol name.
+pub const IMPORT_OBJECT_NAME: u16 = 1;
+/// Import name == public symbol name skipping leading ?, @, or optionally _.
+pub const IMPORT_OBJECT_NAME_NO_PREFIX: u16 = 2;
+/// Import name == public symbol name skipping leading ?, @, or optionally _ and truncating at first @.
+pub const IMPORT_OBJECT_NAME_UNDECORATE: u16 = 3;
+/// Import name == a name is explicitly provided after the DLL name.
+pub const IMPORT_OBJECT_NAME_EXPORTAS: u16 = 4;
+
+// COM+ Header entry point flags.
+pub const COMIMAGE_FLAGS_ILONLY: u32 = 0x0000_0001;
+pub const COMIMAGE_FLAGS_32BITREQUIRED: u32 = 0x0000_0002;
+pub const COMIMAGE_FLAGS_IL_LIBRARY: u32 = 0x0000_0004;
+pub const COMIMAGE_FLAGS_STRONGNAMESIGNED: u32 = 0x0000_0008;
+pub const COMIMAGE_FLAGS_NATIVE_ENTRYPOINT: u32 = 0x0000_0010;
+pub const COMIMAGE_FLAGS_TRACKDEBUGDATA: u32 = 0x0001_0000;
+pub const COMIMAGE_FLAGS_32BITPREFERRED: u32 = 0x0002_0000;
+
+// Version flags for image.
+pub const COR_VERSION_MAJOR_V2: u16 = 2;
+pub const COR_VERSION_MAJOR: u16 = COR_VERSION_MAJOR_V2;
+pub const COR_VERSION_MINOR: u16 = 5;
+pub const COR_DELETED_NAME_LENGTH: usize = 8;
+pub const COR_VTABLEGAP_NAME_LENGTH: usize = 8;
+
+// Maximum size of a NativeType descriptor.
+pub const NATIVE_TYPE_MAX_CB: u16 = 1;
+pub const COR_ILMETHOD_SECT_SMALL_MAX_DATASIZE: u16 = 0xFF;
+
+// Consts for the MIH FLAGS
+pub const IMAGE_COR_MIH_METHODRVA: u16 = 0x01;
+pub const IMAGE_COR_MIH_EHRVA: u16 = 0x02;
+pub const IMAGE_COR_MIH_BASICBLOCK: u16 = 0x08;
+
+// V-table constants
+/// V-table slots are 32-bits in size.
+pub const COR_VTABLE_32BIT: u16 = 0x01;
+/// V-table slots are 64-bits in size.
+pub const COR_VTABLE_64BIT: u16 = 0x02;
+/// If set, transition from unmanaged.
+pub const COR_VTABLE_FROM_UNMANAGED: u16 = 0x04;
+/// If set, transition from unmanaged with keeping the current appdomain.
+pub const COR_VTABLE_FROM_UNMANAGED_RETAIN_APPDOMAIN: u16 = 0x08;
+/// Call most derived method described by
+pub const COR_VTABLE_CALL_MOST_DERIVED: u16 = 0x10;
+
+// EATJ constants
+/// Size of a jump thunk reserved range.
+pub const IMAGE_COR_EATJ_THUNK_SIZE: usize = 32;
+
+// Max name lengths
+pub const MAX_CLASS_NAME: usize = 1024;
+pub const MAX_PACKAGE_NAME: usize = 1024;
+
+// CLR 2.0 header structure.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ImageCor20Header {
+    // Header versioning
+    pub cb: U32<LE>,
+    pub major_runtime_version: U16<LE>,
+    pub minor_runtime_version: U16<LE>,
+
+    // Symbol table and startup information
+    pub meta_data: ImageDataDirectory,
+    pub flags: U32<LE>,
+
+    // If COMIMAGE_FLAGS_NATIVE_ENTRYPOINT is not set, EntryPointToken represents a managed entrypoint.
+    // If COMIMAGE_FLAGS_NATIVE_ENTRYPOINT is set, EntryPointRVA represents an RVA to a native entrypoint.
+    pub entry_point_token_or_rva: U32<LE>,
+
+    // Binding information
+    pub resources: ImageDataDirectory,
+    pub strong_name_signature: ImageDataDirectory,
+
+    // Regular fixup and binding information
+    pub code_manager_table: ImageDataDirectory,
+    pub vtable_fixups: ImageDataDirectory,
+    pub export_address_table_jumps: ImageDataDirectory,
+
+    // Precompiled image info (internal use only - set to zero)
+    pub managed_native_header: ImageDataDirectory,
+}
+
+unsafe_impl_pod!(
+    ImageDosHeader,
+    ImageOs2Header,
+    ImageVxdHeader,
+    ImageFileHeader,
+    ImageDataDirectory,
+    ImageOptionalHeader32,
+    ImageRomOptionalHeader,
+    ImageOptionalHeader64,
+    ImageNtHeaders64,
+    ImageNtHeaders32,
+    ImageRomHeaders,
+    Guid,
+    AnonObjectHeader,
+    AnonObjectHeaderV2,
+    AnonObjectHeaderBigobj,
+    ImageSectionHeader,
+    ImageSymbol,
+    ImageSymbolBytes,
+    ImageSymbolEx,
+    ImageSymbolExBytes,
+    ImageAuxSymbolTokenDef,
+    ImageAuxSymbolFunction,
+    ImageAuxSymbolFunctionBeginEnd,
+    ImageAuxSymbolWeak,
+    ImageAuxSymbolSection,
+    ImageAuxSymbolCrc,
+    ImageRelocation,
+    ImageLinenumber,
+    ImageBaseRelocation,
+    ImageArchiveMemberHeader,
+    ImageExportDirectory,
+    ImageImportByName,
+    ImageThunkData64,
+    ImageThunkData32,
+    ImageTlsDirectory64,
+    ImageTlsDirectory32,
+    ImageImportDescriptor,
+    ImageBoundImportDescriptor,
+    ImageBoundForwarderRef,
+    ImageDelayloadDescriptor,
+    ImageResourceDirectory,
+    ImageResourceDirectoryEntry,
+    ImageResourceDirectoryString,
+    ImageResourceDirStringU,
+    ImageResourceDataEntry,
+    ImageLoadConfigCodeIntegrity,
+    ImageDynamicRelocationTable,
+    ImageDynamicRelocation32,
+    ImageDynamicRelocation64,
+    ImageDynamicRelocation32V2,
+    ImageDynamicRelocation64V2,
+    ImagePrologueDynamicRelocationHeader,
+    ImageEpilogueDynamicRelocationHeader,
+    //ImageImportControlTransferDynamicRelocation,
+    //ImageIndirControlTransferDynamicRelocation,
+    //ImageSwitchtableBranchDynamicRelocation,
+    ImageLoadConfigDirectory32,
+    ImageLoadConfigDirectory64,
+    ImageHotPatchInfo,
+    ImageHotPatchBase,
+    ImageHotPatchHashes,
+    //ImageCeRuntimeFunctionEntry,
+    ImageArmRuntimeFunctionEntry,
+    ImageArm64RuntimeFunctionEntry,
+    ImageAlpha64RuntimeFunctionEntry,
+    ImageAlphaRuntimeFunctionEntry,
+    ImageRuntimeFunctionEntry,
+    ImageEnclaveConfig32,
+    ImageEnclaveConfig64,
+    ImageEnclaveImport,
+    ImageDebugDirectory,
+    ImageCoffSymbolsHeader,
+    //FpoData,
+    ImageDebugMisc,
+    ImageFunctionEntry,
+    ImageFunctionEntry64,
+    ImageSeparateDebugHeader,
+    NonPagedDebugInfo,
+    //ImageArchitectureHeader,
+    ImageArchitectureEntry,
+    ImportObjectHeader,
+    ImageCor20Header,
+    MaskedRichHeaderEntry,
+);
diff --git a/third_party/rust/object/src/pod.rs b/third_party/rust/object/src/pod.rs
new file mode 100644
index 0000000000..8ee78164f5
--- /dev/null
+++ b/third_party/rust/object/src/pod.rs
@@ -0,0 +1,239 @@
+//! Tools for converting file format structures to and from bytes.
+//!
+//! This module should be replaced once rust provides safe transmutes.
+
+// This module provides functions for both read and write features.
+#![cfg_attr(
+    not(all(feature = "read_core", feature = "write_core")),
+    allow(dead_code)
+)]
+
+use core::{mem, result, slice};
+
+type Result<T> = result::Result<T, ()>;
+
+/// A trait for types that can safely be converted from and to byte slices.
+///
+/// # Safety
+/// A type that is `Pod` must:
+/// - be `#[repr(C)]` or `#[repr(transparent)]`
+/// - have no invalid byte values
+/// - have no padding
+pub unsafe trait Pod: Copy + 'static {}
+
+/// Cast a byte slice to a `Pod` type.
+///
+/// Returns the type and the tail of the slice.
+#[inline]
+pub fn from_bytes<T: Pod>(data: &[u8]) -> Result<(&T, &[u8])> {
+    let size = mem::size_of::<T>();
+    let tail = data.get(size..).ok_or(())?;
+    let ptr = data.as_ptr();
+    if (ptr as usize) % mem::align_of::<T>() != 0 {
+        return Err(());
+    }
+    // Safety:
+    // The alignment and size are checked by this function.
+    // The Pod trait ensures the type is valid to cast from bytes.
+    let val = unsafe { &*ptr.cast() };
+    Ok((val, tail))
+}
+
+/// Cast a mutable byte slice to a `Pod` type.
+///
+/// Returns the type and the tail of the slice.
+#[inline]
+pub fn from_bytes_mut<T: Pod>(data: &mut [u8]) -> Result<(&mut T, &mut [u8])> {
+    let size = mem::size_of::<T>();
+    if size > data.len() {
+        return Err(());
+    }
+    let (data, tail) = data.split_at_mut(size);
+    let ptr = data.as_mut_ptr();
+    if (ptr as usize) % mem::align_of::<T>() != 0 {
+        return Err(());
+    }
+    // Safety:
+    // The alignment and size are checked by this function.
+    // The Pod trait ensures the type is valid to cast from bytes.
+    let val = unsafe { &mut *ptr.cast() };
+    Ok((val, tail))
+}
+
+/// Cast a byte slice to a slice of a `Pod` type.
+///
+/// Returns the type slice and the tail of the byte slice.
+#[inline]
+pub fn slice_from_bytes<T: Pod>(data: &[u8], count: usize) -> Result<(&[T], &[u8])> {
+    let size = count.checked_mul(mem::size_of::<T>()).ok_or(())?;
+    let tail = data.get(size..).ok_or(())?;
+    let ptr = data.as_ptr();
+    if (ptr as usize) % mem::align_of::<T>() != 0 {
+        return Err(());
+    }
+    // Safety:
+    // The alignment and size are checked by this function.
+    // The Pod trait ensures the type is valid to cast from bytes.
+    let slice = unsafe { slice::from_raw_parts(ptr.cast(), count) };
+    Ok((slice, tail))
+}
+
+/// Cast a mutable byte slice to a slice of a `Pod` type.
+///
+/// Returns the type slice and the tail of the byte slice.
+#[inline]
+pub fn slice_from_bytes_mut<T: Pod>(
+    data: &mut [u8],
+    count: usize,
+) -> Result<(&mut [T], &mut [u8])> {
+    let size = count.checked_mul(mem::size_of::<T>()).ok_or(())?;
+    if size > data.len() {
+        return Err(());
+    }
+    let (data, tail) = data.split_at_mut(size);
+    let ptr = data.as_mut_ptr();
+    if (ptr as usize) % mem::align_of::<T>() != 0 {
+        return Err(());
+    }
+    // Safety:
+    // The alignment and size are checked by this function.
+    // The Pod trait ensures the type is valid to cast from bytes.
+    let slice = unsafe { slice::from_raw_parts_mut(ptr.cast(), count) };
+    Ok((slice, tail))
+}
+
+/// Cast a `Pod` type to a byte slice.
+#[inline]
+pub fn bytes_of<T: Pod>(val: &T) -> &[u8] {
+    let size = mem::size_of::<T>();
+    // Safety:
+    // Any alignment is allowed.
+    // The size is determined in this function.
+    // The Pod trait ensures the type is valid to cast to bytes.
+    unsafe { slice::from_raw_parts(slice::from_ref(val).as_ptr().cast(), size) }
+}
+
+/// Cast a `Pod` type to a mutable byte slice.
+#[inline]
+pub fn bytes_of_mut<T: Pod>(val: &mut T) -> &mut [u8] {
+    let size = mem::size_of::<T>();
+    // Safety:
+    // Any alignment is allowed.
+    // The size is determined in this function.
+    // The Pod trait ensures the type is valid to cast to bytes.
+    unsafe { slice::from_raw_parts_mut(slice::from_mut(val).as_mut_ptr().cast(), size) }
+}
+
+/// Cast a slice of a `Pod` type to a byte slice.
+#[inline]
+pub fn bytes_of_slice<T: Pod>(val: &[T]) -> &[u8] {
+    let size = val.len().wrapping_mul(mem::size_of::<T>());
+    // Safety:
+    // Any alignment is allowed.
+    // The size is determined in this function.
+    // The Pod trait ensures the type is valid to cast to bytes.
+    unsafe { slice::from_raw_parts(val.as_ptr().cast(), size) }
+}
+
+/// Cast a slice of a `Pod` type to a mutable byte slice.
+#[inline]
+pub fn bytes_of_slice_mut<T: Pod>(val: &mut [T]) -> &mut [u8] {
+    let size = val.len().wrapping_mul(mem::size_of::<T>());
+    // Safety:
+    // Any alignment is allowed.
+    // The size is determined in this function.
+    // The Pod trait ensures the type is valid to cast to bytes.
+    unsafe { slice::from_raw_parts_mut(val.as_mut_ptr().cast(), size) }
+}
+
+macro_rules! unsafe_impl_pod {
+    ($($struct_name:ident),+ $(,)?) => {
+        $(
+            unsafe impl Pod for $struct_name { }
+        )+
+    }
+}
+
+unsafe_impl_pod!(u8, u16, u32, u64);
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn single() {
+        let x = u32::to_be(0x0123_4567);
+        let mut x_mut = x;
+        let bytes = bytes_of(&x);
+        let bytes_mut = bytes_of_mut(&mut x_mut);
+        assert_eq!(bytes, [0x01, 0x23, 0x45, 0x67]);
+        assert_eq!(bytes, bytes_mut);
+
+        let x16 = [u16::to_be(0x0123), u16::to_be(0x4567)];
+
+        let (y, tail) = from_bytes::<u32>(bytes).unwrap();
+        let (y_mut, tail_mut) = from_bytes_mut::<u32>(bytes_mut).unwrap();
+        assert_eq!(*y, x);
+        assert_eq!(y, y_mut);
+        assert_eq!(tail, &[]);
+        assert_eq!(tail, tail_mut);
+
+        let (y, tail) = from_bytes::<u16>(bytes).unwrap();
+        let (y_mut, tail_mut) = from_bytes_mut::<u16>(bytes_mut).unwrap();
+        assert_eq!(*y, x16[0]);
+        assert_eq!(y, y_mut);
+        assert_eq!(tail, &bytes[2..]);
+        assert_eq!(tail, tail_mut);
+
+        let (y, tail) = from_bytes::<u16>(&bytes[2..]).unwrap();
+        let (y_mut, tail_mut) = from_bytes_mut::<u16>(&mut bytes_mut[2..]).unwrap();
+        assert_eq!(*y, x16[1]);
+        assert_eq!(y, y_mut);
+        assert_eq!(tail, &[]);
+        assert_eq!(tail, tail_mut);
+
+        assert_eq!(from_bytes::<u16>(&bytes[1..]), Err(()));
+        assert_eq!(from_bytes::<u16>(&bytes[3..]), Err(()));
+        assert_eq!(from_bytes::<u16>(&bytes[4..]), Err(()));
+        assert_eq!(from_bytes_mut::<u16>(&mut bytes_mut[1..]), Err(()));
+        assert_eq!(from_bytes_mut::<u16>(&mut bytes_mut[3..]), Err(()));
+        assert_eq!(from_bytes_mut::<u16>(&mut bytes_mut[4..]), Err(()));
+    }
+
+    #[test]
+    fn slice() {
+        let x = [
+            u16::to_be(0x0123),
+            u16::to_be(0x4567),
+            u16::to_be(0x89ab),
+            u16::to_be(0xcdef),
+        ];
+        let mut x_mut = x;
+
+        let bytes = bytes_of_slice(&x);
+        let bytes_mut = bytes_of_slice_mut(&mut x_mut);
+        assert_eq!(bytes, [0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef]);
+        assert_eq!(bytes, bytes_mut);
+
+        let (y, tail) = slice_from_bytes::<u16>(bytes, 4).unwrap();
+        let (y_mut, tail_mut) = slice_from_bytes_mut::<u16>(bytes_mut, 4).unwrap();
+        assert_eq!(y, x);
+        assert_eq!(y, y_mut);
+        assert_eq!(tail, &[]);
+        assert_eq!(tail, tail_mut);
+
+        let (y, tail) = slice_from_bytes::<u16>(&bytes[2..], 2).unwrap();
+        let (y_mut, tail_mut) = slice_from_bytes::<u16>(&mut bytes_mut[2..], 2).unwrap();
+        assert_eq!(y, &x[1..3]);
+        assert_eq!(y, y_mut);
+        assert_eq!(tail, &bytes[6..]);
+        assert_eq!(tail, tail_mut);
+
+        assert_eq!(slice_from_bytes::<u16>(bytes, 5), Err(()));
+        assert_eq!(slice_from_bytes::<u16>(&bytes[2..], 4), Err(()));
+        assert_eq!(slice_from_bytes::<u16>(&bytes[1..], 2), Err(()));
+        assert_eq!(slice_from_bytes_mut::<u16>(bytes_mut, 5), Err(()));
+        assert_eq!(slice_from_bytes_mut::<u16>(&mut bytes_mut[2..], 4), Err(()));
+        assert_eq!(slice_from_bytes_mut::<u16>(&mut bytes_mut[1..], 2), Err(()));
+    }
+}
diff --git a/third_party/rust/object/src/read/any.rs b/third_party/rust/object/src/read/any.rs
new file mode 100644
index 0000000000..c390b21b60
--- /dev/null
+++ b/third_party/rust/object/src/read/any.rs
@@ -0,0 +1,1341 @@
+use alloc::fmt;
+use alloc::vec::Vec;
+use core::marker::PhantomData;
+
+#[cfg(feature = "coff")]
+use crate::read::coff;
+#[cfg(feature = "elf")]
+use crate::read::elf;
+#[cfg(feature = "macho")]
+use crate::read::macho;
+#[cfg(feature = "pe")]
+use crate::read::pe;
+#[cfg(feature = "wasm")]
+use crate::read::wasm;
+#[cfg(feature = "xcoff")]
+use crate::read::xcoff;
+use crate::read::{
+    self, Architecture, BinaryFormat, CodeView, ComdatKind, CompressedData, CompressedFileRange,
+    Error, Export, FileFlags, FileKind, Import, Object, ObjectComdat, ObjectKind, ObjectMap,
+    ObjectSection, ObjectSegment, ObjectSymbol, ObjectSymbolTable, ReadRef, Relocation, Result,
+    SectionFlags, SectionIndex, SectionKind, SegmentFlags, SymbolFlags, SymbolIndex, SymbolKind,
+    SymbolMap, SymbolMapName, SymbolScope, SymbolSection,
+};
+#[allow(unused_imports)]
+use crate::{AddressSize, Endian, Endianness};
+
+/// Evaluate an expression on the contents of a file format enum.
+///
+/// This is a hack to avoid virtual calls.
+macro_rules! with_inner {
+    ($inner:expr, $enum:ident, | $var:ident | $body:expr) => {
+        match $inner {
+            #[cfg(feature = "coff")]
+            $enum::Coff(ref $var) => $body,
+            #[cfg(feature = "elf")]
+            $enum::Elf32(ref $var) => $body,
+            #[cfg(feature = "elf")]
+            $enum::Elf64(ref $var) => $body,
+            #[cfg(feature = "macho")]
+            $enum::MachO32(ref $var) => $body,
+            #[cfg(feature = "macho")]
+            $enum::MachO64(ref $var) => $body,
+            #[cfg(feature = "pe")]
+            $enum::Pe32(ref $var) => $body,
+            #[cfg(feature = "pe")]
+            $enum::Pe64(ref $var) => $body,
+            #[cfg(feature = "wasm")]
+            $enum::Wasm(ref $var) => $body,
+            #[cfg(feature = "xcoff")]
+            $enum::Xcoff32(ref $var) => $body,
+            #[cfg(feature = "xcoff")]
+            $enum::Xcoff64(ref $var) => $body,
+        }
+    };
+}
+
+macro_rules! with_inner_mut {
+    ($inner:expr, $enum:ident, | $var:ident | $body:expr) => {
+        match $inner {
+            #[cfg(feature = "coff")]
+            $enum::Coff(ref mut $var) => $body,
+            #[cfg(feature = "elf")]
+            $enum::Elf32(ref mut $var) => $body,
+            #[cfg(feature = "elf")]
+            $enum::Elf64(ref mut $var) => $body,
+            #[cfg(feature = "macho")]
+            $enum::MachO32(ref mut $var) => $body,
+            #[cfg(feature = "macho")]
+            $enum::MachO64(ref mut $var) => $body,
+            #[cfg(feature = "pe")]
+            $enum::Pe32(ref mut $var) => $body,
+            #[cfg(feature = "pe")]
+            $enum::Pe64(ref mut $var) => $body,
+            #[cfg(feature = "wasm")]
+            $enum::Wasm(ref mut $var) => $body,
+            #[cfg(feature = "xcoff")]
+            $enum::Xcoff32(ref mut $var) => $body,
+            #[cfg(feature = "xcoff")]
+            $enum::Xcoff64(ref mut $var) => $body,
+        }
+    };
+}
+
+/// Like `with_inner!`, but wraps the result in another enum.
+macro_rules! map_inner {
+    ($inner:expr, $from:ident, $to:ident, | $var:ident | $body:expr) => {
+        match $inner {
+            #[cfg(feature = "coff")]
+            $from::Coff(ref $var) => $to::Coff($body),
+            #[cfg(feature = "elf")]
+            $from::Elf32(ref $var) => $to::Elf32($body),
+            #[cfg(feature = "elf")]
+            $from::Elf64(ref $var) => $to::Elf64($body),
+            #[cfg(feature = "macho")]
+            $from::MachO32(ref $var) => $to::MachO32($body),
+            #[cfg(feature = "macho")]
+            $from::MachO64(ref $var) => $to::MachO64($body),
+            #[cfg(feature = "pe")]
+            $from::Pe32(ref $var) => $to::Pe32($body),
+            #[cfg(feature = "pe")]
+            $from::Pe64(ref $var) => $to::Pe64($body),
+            #[cfg(feature = "wasm")]
+            $from::Wasm(ref $var) => $to::Wasm($body),
+            #[cfg(feature = "xcoff")]
+            $from::Xcoff32(ref $var) => $to::Xcoff32($body),
+            #[cfg(feature = "xcoff")]
+            $from::Xcoff64(ref $var) => $to::Xcoff64($body),
+        }
+    };
+}
+
+/// Like `map_inner!`, but the result is a Result or Option.
+macro_rules! map_inner_option {
+    ($inner:expr, $from:ident, $to:ident, | $var:ident | $body:expr) => {
+        match $inner {
+            #[cfg(feature = "coff")]
+            $from::Coff(ref $var) => $body.map($to::Coff),
+            #[cfg(feature = "elf")]
+            $from::Elf32(ref $var) => $body.map($to::Elf32),
+            #[cfg(feature = "elf")]
+            $from::Elf64(ref $var) => $body.map($to::Elf64),
+            #[cfg(feature = "macho")]
+            $from::MachO32(ref $var) => $body.map($to::MachO32),
+            #[cfg(feature = "macho")]
+            $from::MachO64(ref $var) => $body.map($to::MachO64),
+            #[cfg(feature = "pe")]
+            $from::Pe32(ref $var) => $body.map($to::Pe32),
+            #[cfg(feature = "pe")]
+            $from::Pe64(ref $var) => $body.map($to::Pe64),
+            #[cfg(feature = "wasm")]
+            $from::Wasm(ref $var) => $body.map($to::Wasm),
+            #[cfg(feature = "xcoff")]
+            $from::Xcoff32(ref $var) => $body.map($to::Xcoff32),
+            #[cfg(feature = "xcoff")]
+            $from::Xcoff64(ref $var) => $body.map($to::Xcoff64),
+        }
+    };
+}
+
+macro_rules! map_inner_option_mut {
+    ($inner:expr, $from:ident, $to:ident, | $var:ident | $body:expr) => {
+        match $inner {
+            #[cfg(feature = "coff")]
+            $from::Coff(ref mut $var) => $body.map($to::Coff),
+            #[cfg(feature = "elf")]
+            $from::Elf32(ref mut $var) => $body.map($to::Elf32),
+            #[cfg(feature = "elf")]
+            $from::Elf64(ref mut $var) => $body.map($to::Elf64),
+            #[cfg(feature = "macho")]
+            $from::MachO32(ref mut $var) => $body.map($to::MachO32),
+            #[cfg(feature = "macho")]
+            $from::MachO64(ref mut $var) => $body.map($to::MachO64),
+            #[cfg(feature = "pe")]
+            $from::Pe32(ref mut $var) => $body.map($to::Pe32),
+            #[cfg(feature = "pe")]
+            $from::Pe64(ref mut $var) => $body.map($to::Pe64),
+            #[cfg(feature = "wasm")]
+            $from::Wasm(ref mut $var) => $body.map($to::Wasm),
+            #[cfg(feature = "xcoff")]
+            $from::Xcoff32(ref mut $var) => $body.map($to::Xcoff32),
+            #[cfg(feature = "xcoff")]
+            $from::Xcoff64(ref mut $var) => $body.map($to::Xcoff64),
+        }
+    };
+}
+
+/// Call `next` for a file format iterator.
+macro_rules! next_inner {
+    ($inner:expr, $from:ident, $to:ident) => {
+        match $inner {
+            #[cfg(feature = "coff")]
+            $from::Coff(ref mut iter) => iter.next().map($to::Coff),
+            #[cfg(feature = "elf")]
+            $from::Elf32(ref mut iter) => iter.next().map($to::Elf32),
+            #[cfg(feature = "elf")]
+            $from::Elf64(ref mut iter) => iter.next().map($to::Elf64),
+            #[cfg(feature = "macho")]
+            $from::MachO32(ref mut iter) => iter.next().map($to::MachO32),
+            #[cfg(feature = "macho")]
+            $from::MachO64(ref mut iter) => iter.next().map($to::MachO64),
+            #[cfg(feature = "pe")]
+            $from::Pe32(ref mut iter) => iter.next().map($to::Pe32),
+            #[cfg(feature = "pe")]
+            $from::Pe64(ref mut iter) => iter.next().map($to::Pe64),
+            #[cfg(feature = "wasm")]
+            $from::Wasm(ref mut iter) => iter.next().map($to::Wasm),
+            #[cfg(feature = "xcoff")]
+            $from::Xcoff32(ref mut iter) => iter.next().map($to::Xcoff32),
+            #[cfg(feature = "xcoff")]
+            $from::Xcoff64(ref mut iter) => iter.next().map($to::Xcoff64),
+        }
+    };
+}
+
+/// An object file.
+///
+/// Most functionality is provided by the `Object` trait implementation.
+#[derive(Debug)]
+pub struct File<'data, R: ReadRef<'data> = &'data [u8]> {
+    inner: FileInternal<'data, R>,
+}
+
+#[derive(Debug)]
+enum FileInternal<'data, R: ReadRef<'data>> {
+    #[cfg(feature = "coff")]
+    Coff(coff::CoffFile<'data, R>),
+    #[cfg(feature = "elf")]
+    Elf32(elf::ElfFile32<'data, Endianness, R>),
+    #[cfg(feature = "elf")]
+    Elf64(elf::ElfFile64<'data, Endianness, R>),
+    #[cfg(feature = "macho")]
+    MachO32(macho::MachOFile32<'data, Endianness, R>),
+    #[cfg(feature = "macho")]
+    MachO64(macho::MachOFile64<'data, Endianness, R>),
+    #[cfg(feature = "pe")]
+    Pe32(pe::PeFile32<'data, R>),
+    #[cfg(feature = "pe")]
+    Pe64(pe::PeFile64<'data, R>),
+    #[cfg(feature = "wasm")]
+    Wasm(wasm::WasmFile<'data, R>),
+    #[cfg(feature = "xcoff")]
+    Xcoff32(xcoff::XcoffFile32<'data, R>),
+    #[cfg(feature = "xcoff")]
+    Xcoff64(xcoff::XcoffFile64<'data, R>),
+}
+
+impl<'data, R: ReadRef<'data>> File<'data, R> {
+    /// Parse the raw file data.
+    pub fn parse(data: R) -> Result<Self> {
+        let inner = match FileKind::parse(data)? {
+            #[cfg(feature = "elf")]
+            FileKind::Elf32 => FileInternal::Elf32(elf::ElfFile32::parse(data)?),
+            #[cfg(feature = "elf")]
+            FileKind::Elf64 => FileInternal::Elf64(elf::ElfFile64::parse(data)?),
+            #[cfg(feature = "macho")]
+            FileKind::MachO32 => FileInternal::MachO32(macho::MachOFile32::parse(data)?),
+            #[cfg(feature = "macho")]
+            FileKind::MachO64 => FileInternal::MachO64(macho::MachOFile64::parse(data)?),
+            #[cfg(feature = "wasm")]
+            FileKind::Wasm => FileInternal::Wasm(wasm::WasmFile::parse(data)?),
+            #[cfg(feature = "pe")]
+            FileKind::Pe32 => FileInternal::Pe32(pe::PeFile32::parse(data)?),
+            #[cfg(feature = "pe")]
+            FileKind::Pe64 => FileInternal::Pe64(pe::PeFile64::parse(data)?),
+            #[cfg(feature = "coff")]
+            FileKind::Coff => FileInternal::Coff(coff::CoffFile::parse(data)?),
+            #[cfg(feature = "xcoff")]
+            FileKind::Xcoff32 => FileInternal::Xcoff32(xcoff::XcoffFile32::parse(data)?),
+            #[cfg(feature = "xcoff")]
+            FileKind::Xcoff64 => FileInternal::Xcoff64(xcoff::XcoffFile64::parse(data)?),
+            #[allow(unreachable_patterns)]
+            _ => return Err(Error("Unsupported file format")),
+        };
+        Ok(File { inner })
+    }
+
+    /// Parse a Mach-O image from the dyld shared cache.
+    #[cfg(feature = "macho")]
+    pub fn parse_dyld_cache_image<'cache, E: Endian>(
+        image: &macho::DyldCacheImage<'data, 'cache, E, R>,
+    ) -> Result<Self> {
+        let inner = match image.cache.architecture().address_size() {
+            Some(AddressSize::U64) => {
+                FileInternal::MachO64(macho::MachOFile64::parse_dyld_cache_image(image)?)
+            }
+            Some(AddressSize::U32) => {
+                FileInternal::MachO32(macho::MachOFile32::parse_dyld_cache_image(image)?)
+            }
+            _ => return Err(Error("Unsupported file format")),
+        };
+        Ok(File { inner })
+    }
+
+    /// Return the file format.
+    pub fn format(&self) -> BinaryFormat {
+        match self.inner {
+            #[cfg(feature = "coff")]
+            FileInternal::Coff(_) => BinaryFormat::Coff,
+            #[cfg(feature = "elf")]
+            FileInternal::Elf32(_) | FileInternal::Elf64(_) => BinaryFormat::Elf,
+            #[cfg(feature = "macho")]
+            FileInternal::MachO32(_) | FileInternal::MachO64(_) => BinaryFormat::MachO,
+            #[cfg(feature = "pe")]
+            FileInternal::Pe32(_) | FileInternal::Pe64(_) => BinaryFormat::Pe,
+            #[cfg(feature = "wasm")]
+            FileInternal::Wasm(_) => BinaryFormat::Wasm,
+            #[cfg(feature = "xcoff")]
+            FileInternal::Xcoff32(_) | FileInternal::Xcoff64(_) => BinaryFormat::Xcoff,
+        }
+    }
+}
+
+impl<'data, R: ReadRef<'data>> read::private::Sealed for File<'data, R> {}
+
+impl<'data, 'file, R> Object<'data, 'file> for File<'data, R>
+where
+    'data: 'file,
+    R: 'file + ReadRef<'data>,
+{
+    type Segment = Segment<'data, 'file, R>;
+    type SegmentIterator = SegmentIterator<'data, 'file, R>;
+    type Section = Section<'data, 'file, R>;
+    type SectionIterator = SectionIterator<'data, 'file, R>;
+    type Comdat = Comdat<'data, 'file, R>;
+    type ComdatIterator = ComdatIterator<'data, 'file, R>;
+    type Symbol = Symbol<'data, 'file, R>;
+    type SymbolIterator = SymbolIterator<'data, 'file, R>;
+    type SymbolTable = SymbolTable<'data, 'file, R>;
+    type DynamicRelocationIterator = DynamicRelocationIterator<'data, 'file, R>;
+
+    fn architecture(&self) -> Architecture {
+        with_inner!(self.inner, FileInternal, |x| x.architecture())
+    }
+
+    fn is_little_endian(&self) -> bool {
+        with_inner!(self.inner, FileInternal, |x| x.is_little_endian())
+    }
+
+    fn is_64(&self) -> bool {
+        with_inner!(self.inner, FileInternal, |x| x.is_64())
+    }
+
+    fn kind(&self) -> ObjectKind {
+        with_inner!(self.inner, FileInternal, |x| x.kind())
+    }
+
+    fn segments(&'file self) -> SegmentIterator<'data, 'file, R> {
+        SegmentIterator {
+            inner: map_inner!(self.inner, FileInternal, SegmentIteratorInternal, |x| x
+                .segments()),
+        }
+    }
+
+    fn section_by_name_bytes(&'file self, section_name: &[u8]) -> Option<Section<'data, 'file, R>> {
+        map_inner_option!(self.inner, FileInternal, SectionInternal, |x| x
+            .section_by_name_bytes(section_name))
+        .map(|inner| Section { inner })
+    }
+
+    fn section_by_index(&'file self, index: SectionIndex) -> Result<Section<'data, 'file, R>> {
+        map_inner_option!(self.inner, FileInternal, SectionInternal, |x| x
+            .section_by_index(index))
+        .map(|inner| Section { inner })
+    }
+
+    fn sections(&'file self) -> SectionIterator<'data, 'file, R> {
+        SectionIterator {
+            inner: map_inner!(self.inner, FileInternal, SectionIteratorInternal, |x| x
+                .sections()),
+        }
+    }
+
+    fn comdats(&'file self) -> ComdatIterator<'data, 'file, R> {
+        ComdatIterator {
+            inner: map_inner!(self.inner, FileInternal, ComdatIteratorInternal, |x| x
+                .comdats()),
+        }
+    }
+
+    fn symbol_by_index(&'file self, index: SymbolIndex) -> Result<Symbol<'data, 'file, R>> {
+        map_inner_option!(self.inner, FileInternal, SymbolInternal, |x| x
+            .symbol_by_index(index)
+            .map(|x| (x, PhantomData)))
+        .map(|inner| Symbol { inner })
+    }
+
+    fn symbols(&'file self) -> SymbolIterator<'data, 'file, R> {
+        SymbolIterator {
+            inner: map_inner!(self.inner, FileInternal, SymbolIteratorInternal, |x| (
+                x.symbols(),
+                PhantomData
+            )),
+        }
+    }
+
+    fn symbol_table(&'file self) -> Option<SymbolTable<'data, 'file, R>> {
+        map_inner_option!(self.inner, FileInternal, SymbolTableInternal, |x| x
+            .symbol_table()
+            .map(|x| (x, PhantomData)))
+        .map(|inner| SymbolTable { inner })
+    }
+
+    fn dynamic_symbols(&'file self) -> SymbolIterator<'data, 'file, R> {
+        SymbolIterator {
+            inner: map_inner!(self.inner, FileInternal, SymbolIteratorInternal, |x| (
+                x.dynamic_symbols(),
+                PhantomData
+            )),
+        }
+    }
+
+    fn dynamic_symbol_table(&'file self) -> Option<SymbolTable<'data, 'file, R>> {
+        map_inner_option!(self.inner, FileInternal, SymbolTableInternal, |x| x
+            .dynamic_symbol_table()
+            .map(|x| (x, PhantomData)))
+        .map(|inner| SymbolTable { inner })
+    }
+
+    #[cfg(feature = "elf")]
+    fn dynamic_relocations(&'file self) -> Option<DynamicRelocationIterator<'data, 'file, R>> {
+        let inner = match self.inner {
+            FileInternal::Elf32(ref elf) => {
+                DynamicRelocationIteratorInternal::Elf32(elf.dynamic_relocations()?)
+            }
+            FileInternal::Elf64(ref elf) => {
+                DynamicRelocationIteratorInternal::Elf64(elf.dynamic_relocations()?)
+            }
+            #[allow(unreachable_patterns)]
+            _ => return None,
+        };
+        Some(DynamicRelocationIterator { inner })
+    }
+
+    #[cfg(not(feature = "elf"))]
+    fn dynamic_relocations(&'file self) -> Option<DynamicRelocationIterator<'data, 'file, R>> {
+        None
+    }
+
+    fn symbol_map(&self) -> SymbolMap<SymbolMapName<'data>> {
+        with_inner!(self.inner, FileInternal, |x| x.symbol_map())
+    }
+
+    fn object_map(&self) -> ObjectMap<'data> {
+        with_inner!(self.inner, FileInternal, |x| x.object_map())
+    }
+
+    fn imports(&self) -> Result<Vec<Import<'data>>> {
+        with_inner!(self.inner, FileInternal, |x| x.imports())
+    }
+
+    fn exports(&self) -> Result<Vec<Export<'data>>> {
+        with_inner!(self.inner, FileInternal, |x| x.exports())
+    }
+
+    fn has_debug_symbols(&self) -> bool {
+        with_inner!(self.inner, FileInternal, |x| x.has_debug_symbols())
+    }
+
+    #[inline]
+    fn mach_uuid(&self) -> Result<Option<[u8; 16]>> {
+        with_inner!(self.inner, FileInternal, |x| x.mach_uuid())
+    }
+
+    #[inline]
+    fn build_id(&self) -> Result<Option<&'data [u8]>> {
+        with_inner!(self.inner, FileInternal, |x| x.build_id())
+    }
+
+    #[inline]
+    fn gnu_debuglink(&self) -> Result<Option<(&'data [u8], u32)>> {
+        with_inner!(self.inner, FileInternal, |x| x.gnu_debuglink())
+    }
+
+    #[inline]
+    fn gnu_debugaltlink(&self) -> Result<Option<(&'data [u8], &'data [u8])>> {
+        with_inner!(self.inner, FileInternal, |x| x.gnu_debugaltlink())
+    }
+
+    #[inline]
+    fn pdb_info(&self) -> Result<Option<CodeView>> {
+        with_inner!(self.inner, FileInternal, |x| x.pdb_info())
+    }
+
+    fn relative_address_base(&self) -> u64 {
+        with_inner!(self.inner, FileInternal, |x| x.relative_address_base())
+    }
+
+    fn entry(&self) -> u64 {
+        with_inner!(self.inner, FileInternal, |x| x.entry())
+    }
+
+    fn flags(&self) -> FileFlags {
+        with_inner!(self.inner, FileInternal, |x| x.flags())
+    }
+}
+
+/// An iterator over the segments of a `File`.
+#[derive(Debug)]
+pub struct SegmentIterator<'data, 'file, R: ReadRef<'data> = &'data [u8]>
+where
+    'data: 'file,
+{
+    inner: SegmentIteratorInternal<'data, 'file, R>,
+}
+
+#[derive(Debug)]
+enum SegmentIteratorInternal<'data, 'file, R: ReadRef<'data>>
+where
+    'data: 'file,
+{
+    #[cfg(feature = "coff")]
+    Coff(coff::CoffSegmentIterator<'data, 'file, R>),
+    #[cfg(feature = "elf")]
+    Elf32(elf::ElfSegmentIterator32<'data, 'file, Endianness, R>),
+    #[cfg(feature = "elf")]
+    Elf64(elf::ElfSegmentIterator64<'data, 'file, Endianness, R>),
+    #[cfg(feature = "macho")]
+    MachO32(macho::MachOSegmentIterator32<'data, 'file, Endianness, R>),
+    #[cfg(feature = "macho")]
+    MachO64(macho::MachOSegmentIterator64<'data, 'file, Endianness, R>),
+    #[cfg(feature = "pe")]
+    Pe32(pe::PeSegmentIterator32<'data, 'file, R>),
+    #[cfg(feature = "pe")]
+    Pe64(pe::PeSegmentIterator64<'data, 'file, R>),
+    #[cfg(feature = "wasm")]
+    Wasm(wasm::WasmSegmentIterator<'data, 'file, R>),
+    #[cfg(feature = "xcoff")]
+    Xcoff32(xcoff::XcoffSegmentIterator32<'data, 'file, R>),
+    #[cfg(feature = "xcoff")]
+    Xcoff64(xcoff::XcoffSegmentIterator64<'data, 'file, R>),
+}
+
+impl<'data, 'file, R: ReadRef<'data>> Iterator for SegmentIterator<'data, 'file, R> {
+    type Item = Segment<'data, 'file, R>;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        next_inner!(self.inner, SegmentIteratorInternal, SegmentInternal)
+            .map(|inner| Segment { inner })
+    }
+}
+
+/// A segment of a `File`.
+pub struct Segment<'data, 'file, R: ReadRef<'data> = &'data [u8]>
+where
+    'data: 'file,
+{
+    inner: SegmentInternal<'data, 'file, R>,
+}
+
+#[derive(Debug)]
+enum SegmentInternal<'data, 'file, R: ReadRef<'data>>
+where
+    'data: 'file,
+{
+    #[cfg(feature = "coff")]
+    Coff(coff::CoffSegment<'data, 'file, R>),
+    #[cfg(feature = "elf")]
+    Elf32(elf::ElfSegment32<'data, 'file, Endianness, R>),
+    #[cfg(feature = "elf")]
+    Elf64(elf::ElfSegment64<'data, 'file, Endianness, R>),
+    #[cfg(feature = "macho")]
+    MachO32(macho::MachOSegment32<'data, 'file, Endianness, R>),
+    #[cfg(feature = "macho")]
+    MachO64(macho::MachOSegment64<'data, 'file, Endianness, R>),
+    #[cfg(feature = "pe")]
+    Pe32(pe::PeSegment32<'data, 'file, R>),
+    #[cfg(feature = "pe")]
+    Pe64(pe::PeSegment64<'data, 'file, R>),
+    #[cfg(feature = "wasm")]
+    Wasm(wasm::WasmSegment<'data, 'file, R>),
+    #[cfg(feature = "xcoff")]
+    Xcoff32(xcoff::XcoffSegment32<'data, 'file, R>),
+    #[cfg(feature = "xcoff")]
+    Xcoff64(xcoff::XcoffSegment64<'data, 'file, R>),
+}
+
+impl<'data, 'file, R: ReadRef<'data>> fmt::Debug for Segment<'data, 'file, R> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        // It's painful to do much better than this
+        let mut s = f.debug_struct("Segment");
+        match self.name() {
+            Ok(Some(ref name)) => {
+                s.field("name", name);
+            }
+            Ok(None) => {}
+            Err(_) => {
+                s.field("name", &"<invalid>");
+            }
+        }
+        s.field("address", &self.address())
+            .field("size", &self.size())
+            .finish()
+    }
+}
+
+impl<'data, 'file, R: ReadRef<'data>> read::private::Sealed for Segment<'data, 'file, R> {}
+
+impl<'data, 'file, R: ReadRef<'data>> ObjectSegment<'data> for Segment<'data, 'file, R> {
+    fn address(&self) -> u64 {
+        with_inner!(self.inner, SegmentInternal, |x| x.address())
+    }
+
+    fn size(&self) -> u64 {
+        with_inner!(self.inner, SegmentInternal, |x| x.size())
+    }
+
+    fn align(&self) -> u64 {
+        with_inner!(self.inner, SegmentInternal, |x| x.align())
+    }
+
+    fn file_range(&self) -> (u64, u64) {
+        with_inner!(self.inner, SegmentInternal, |x| x.file_range())
+    }
+
+    fn data(&self) -> Result<&'data [u8]> {
+        with_inner!(self.inner, SegmentInternal, |x| x.data())
+    }
+
+    fn data_range(&self, address: u64, size: u64) -> Result<Option<&'data [u8]>> {
+        with_inner!(self.inner, SegmentInternal, |x| x.data_range(address, size))
+    }
+
+    fn name_bytes(&self) -> Result<Option<&[u8]>> {
+        with_inner!(self.inner, SegmentInternal, |x| x.name_bytes())
+    }
+
+    fn name(&self) -> Result<Option<&str>> {
+        with_inner!(self.inner, SegmentInternal, |x| x.name())
+    }
+
+    fn flags(&self) -> SegmentFlags {
+        with_inner!(self.inner, SegmentInternal, |x| x.flags())
+    }
+}
+
+/// An iterator of the sections of a `File`.
+#[derive(Debug)]
+pub struct SectionIterator<'data, 'file, R: ReadRef<'data> = &'data [u8]>
+where
+    'data: 'file,
+{
+    inner: SectionIteratorInternal<'data, 'file, R>,
+}
+
+// we wrap our enums in a struct so that they are kept private.
+#[derive(Debug)]
+enum SectionIteratorInternal<'data, 'file, R: ReadRef<'data>>
+where
+    'data: 'file,
+{
+    #[cfg(feature = "coff")]
+    Coff(coff::CoffSectionIterator<'data, 'file, R>),
+    #[cfg(feature = "elf")]
+    Elf32(elf::ElfSectionIterator32<'data, 'file, Endianness, R>),
+    #[cfg(feature = "elf")]
+    Elf64(elf::ElfSectionIterator64<'data, 'file, Endianness, R>),
+    #[cfg(feature = "macho")]
+    MachO32(macho::MachOSectionIterator32<'data, 'file, Endianness, R>),
+    #[cfg(feature = "macho")]
+    MachO64(macho::MachOSectionIterator64<'data, 'file, Endianness, R>),
+    #[cfg(feature = "pe")]
+    Pe32(pe::PeSectionIterator32<'data, 'file, R>),
+    #[cfg(feature = "pe")]
+    Pe64(pe::PeSectionIterator64<'data, 'file, R>),
+    #[cfg(feature = "wasm")]
+    Wasm(wasm::WasmSectionIterator<'data, 'file, R>),
+    #[cfg(feature = "xcoff")]
+    Xcoff32(xcoff::XcoffSectionIterator32<'data, 'file, R>),
+    #[cfg(feature = "xcoff")]
+    Xcoff64(xcoff::XcoffSectionIterator64<'data, 'file, R>),
+}
+
+impl<'data, 'file, R: ReadRef<'data>> Iterator for SectionIterator<'data, 'file, R> {
+    type Item = Section<'data, 'file, R>;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        next_inner!(self.inner, SectionIteratorInternal, SectionInternal)
+            .map(|inner| Section { inner })
+    }
+}
+
+/// A Section of a File
+pub struct Section<'data, 'file, R: ReadRef<'data> = &'data [u8]>
+where
+    'data: 'file,
+{
+    inner: SectionInternal<'data, 'file, R>,
+}
+
+enum SectionInternal<'data, 'file, R: ReadRef<'data>>
+where
+    'data: 'file,
+{
+    #[cfg(feature = "coff")]
+    Coff(coff::CoffSection<'data, 'file, R>),
+    #[cfg(feature = "elf")]
+    Elf32(elf::ElfSection32<'data, 'file, Endianness, R>),
+    #[cfg(feature = "elf")]
+    Elf64(elf::ElfSection64<'data, 'file, Endianness, R>),
+    #[cfg(feature = "macho")]
+    MachO32(macho::MachOSection32<'data, 'file, Endianness, R>),
+    #[cfg(feature = "macho")]
+    MachO64(macho::MachOSection64<'data, 'file, Endianness, R>),
+    #[cfg(feature = "pe")]
+    Pe32(pe::PeSection32<'data, 'file, R>),
+    #[cfg(feature = "pe")]
+    Pe64(pe::PeSection64<'data, 'file, R>),
+    #[cfg(feature = "wasm")]
+    Wasm(wasm::WasmSection<'data, 'file, R>),
+    #[cfg(feature = "xcoff")]
+    Xcoff32(xcoff::XcoffSection32<'data, 'file, R>),
+    #[cfg(feature = "xcoff")]
+    Xcoff64(xcoff::XcoffSection64<'data, 'file, R>),
+}
+
+impl<'data, 'file, R: ReadRef<'data>> fmt::Debug for Section<'data, 'file, R> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        // It's painful to do much better than this
+        let mut s = f.debug_struct("Section");
+        match self.segment_name() {
+            Ok(Some(ref name)) => {
+                s.field("segment", name);
+            }
+            Ok(None) => {}
+            Err(_) => {
+                s.field("segment", &"<invalid>");
+            }
+        }
+        s.field("name", &self.name().unwrap_or("<invalid>"))
+            .field("address", &self.address())
+            .field("size", &self.size())
+            .field("align", &self.align())
+            .field("kind", &self.kind())
+            .field("flags", &self.flags())
+            .finish()
+    }
+}
+
+impl<'data, 'file, R: ReadRef<'data>> read::private::Sealed for Section<'data, 'file, R> {}
+
+impl<'data, 'file, R: ReadRef<'data>> ObjectSection<'data> for Section<'data, 'file, R> {
+    type RelocationIterator = SectionRelocationIterator<'data, 'file, R>;
+
+    fn index(&self) -> SectionIndex {
+        with_inner!(self.inner, SectionInternal, |x| x.index())
+    }
+
+    fn address(&self) -> u64 {
+        with_inner!(self.inner, SectionInternal, |x| x.address())
+    }
+
+    fn size(&self) -> u64 {
+        with_inner!(self.inner, SectionInternal, |x| x.size())
+    }
+
+    fn align(&self) -> u64 {
+        with_inner!(self.inner, SectionInternal, |x| x.align())
+    }
+
+    fn file_range(&self) -> Option<(u64, u64)> {
+        with_inner!(self.inner, SectionInternal, |x| x.file_range())
+    }
+
+    fn data(&self) -> Result<&'data [u8]> {
+        with_inner!(self.inner, SectionInternal, |x| x.data())
+    }
+
+    fn data_range(&self, address: u64, size: u64) -> Result<Option<&'data [u8]>> {
+        with_inner!(self.inner, SectionInternal, |x| x.data_range(address, size))
+    }
+
+    fn compressed_file_range(&self) -> Result<CompressedFileRange> {
+        with_inner!(self.inner, SectionInternal, |x| x.compressed_file_range())
+    }
+
+    fn compressed_data(&self) -> Result<CompressedData<'data>> {
+        with_inner!(self.inner, SectionInternal, |x| x.compressed_data())
+    }
+
+    fn name_bytes(&self) -> Result<&[u8]> {
+        with_inner!(self.inner, SectionInternal, |x| x.name_bytes())
+    }
+
+    fn name(&self) -> Result<&str> {
+        with_inner!(self.inner, SectionInternal, |x| x.name())
+    }
+
+    fn segment_name_bytes(&self) -> Result<Option<&[u8]>> {
+        with_inner!(self.inner, SectionInternal, |x| x.segment_name_bytes())
+    }
+
+    fn segment_name(&self) -> Result<Option<&str>> {
+        with_inner!(self.inner, SectionInternal, |x| x.segment_name())
+    }
+
+    fn kind(&self) -> SectionKind {
+        with_inner!(self.inner, SectionInternal, |x| x.kind())
+    }
+
+    fn relocations(&self) -> SectionRelocationIterator<'data, 'file, R> {
+        SectionRelocationIterator {
+            inner: map_inner!(
+                self.inner,
+                SectionInternal,
+                SectionRelocationIteratorInternal,
+                |x| x.relocations()
+            ),
+        }
+    }
+
+    fn flags(&self) -> SectionFlags {
+        with_inner!(self.inner, SectionInternal, |x| x.flags())
+    }
+}
+
+/// An iterator of the COMDAT section groups of a `File`.
+#[derive(Debug)]
+pub struct ComdatIterator<'data, 'file, R: ReadRef<'data> = &'data [u8]>
+where
+    'data: 'file,
+{
+    inner: ComdatIteratorInternal<'data, 'file, R>,
+}
+
+#[derive(Debug)]
+enum ComdatIteratorInternal<'data, 'file, R: ReadRef<'data>>
+where
+    'data: 'file,
+{
+    #[cfg(feature = "coff")]
+    Coff(coff::CoffComdatIterator<'data, 'file, R>),
+    #[cfg(feature = "elf")]
+    Elf32(elf::ElfComdatIterator32<'data, 'file, Endianness, R>),
+    #[cfg(feature = "elf")]
+    Elf64(elf::ElfComdatIterator64<'data, 'file, Endianness, R>),
+    #[cfg(feature = "macho")]
+    MachO32(macho::MachOComdatIterator32<'data, 'file, Endianness, R>),
+    #[cfg(feature = "macho")]
+    MachO64(macho::MachOComdatIterator64<'data, 'file, Endianness, R>),
+    #[cfg(feature = "pe")]
+    Pe32(pe::PeComdatIterator32<'data, 'file, R>),
+    #[cfg(feature = "pe")]
+    Pe64(pe::PeComdatIterator64<'data, 'file, R>),
+    #[cfg(feature = "wasm")]
+    Wasm(wasm::WasmComdatIterator<'data, 'file, R>),
+    #[cfg(feature = "xcoff")]
+    Xcoff32(xcoff::XcoffComdatIterator32<'data, 'file, R>),
+    #[cfg(feature = "xcoff")]
+    Xcoff64(xcoff::XcoffComdatIterator64<'data, 'file, R>),
+}
+
+impl<'data, 'file, R: ReadRef<'data>> Iterator for ComdatIterator<'data, 'file, R> {
+    type Item = Comdat<'data, 'file, R>;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        next_inner!(self.inner, ComdatIteratorInternal, ComdatInternal)
+            .map(|inner| Comdat { inner })
+    }
+}
+
+/// A COMDAT section group of a `File`.
+pub struct Comdat<'data, 'file, R: ReadRef<'data> = &'data [u8]>
+where
+    'data: 'file,
+{
+    inner: ComdatInternal<'data, 'file, R>,
+}
+
+enum ComdatInternal<'data, 'file, R: ReadRef<'data>>
+where
+    'data: 'file,
+{
+    #[cfg(feature = "coff")]
+    Coff(coff::CoffComdat<'data, 'file, R>),
+    #[cfg(feature = "elf")]
+    Elf32(elf::ElfComdat32<'data, 'file, Endianness, R>),
+    #[cfg(feature = "elf")]
+    Elf64(elf::ElfComdat64<'data, 'file, Endianness, R>),
+    #[cfg(feature = "macho")]
+    MachO32(macho::MachOComdat32<'data, 'file, Endianness, R>),
+    #[cfg(feature = "macho")]
+    MachO64(macho::MachOComdat64<'data, 'file, Endianness, R>),
+    #[cfg(feature = "pe")]
+    Pe32(pe::PeComdat32<'data, 'file, R>),
+    #[cfg(feature = "pe")]
+    Pe64(pe::PeComdat64<'data, 'file, R>),
+    #[cfg(feature = "wasm")]
+    Wasm(wasm::WasmComdat<'data, 'file, R>),
+    #[cfg(feature = "xcoff")]
+    Xcoff32(xcoff::XcoffComdat32<'data, 'file, R>),
+    #[cfg(feature = "xcoff")]
+    Xcoff64(xcoff::XcoffComdat64<'data, 'file, R>),
+}
+
+impl<'data, 'file, R: ReadRef<'data>> fmt::Debug for Comdat<'data, 'file, R> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        let mut s = f.debug_struct("Comdat");
+        s.field("symbol", &self.symbol())
+            .field("name", &self.name().unwrap_or("<invalid>"))
+            .field("kind", &self.kind())
+            .finish()
+    }
+}
+
+impl<'data, 'file, R: ReadRef<'data>> read::private::Sealed for Comdat<'data, 'file, R> {}
+
+impl<'data, 'file, R: ReadRef<'data>> ObjectComdat<'data> for Comdat<'data, 'file, R> {
+    type SectionIterator = ComdatSectionIterator<'data, 'file, R>;
+
+    fn kind(&self) -> ComdatKind {
+        with_inner!(self.inner, ComdatInternal, |x| x.kind())
+    }
+
+    fn symbol(&self) -> SymbolIndex {
+        with_inner!(self.inner, ComdatInternal, |x| x.symbol())
+    }
+
+    fn name_bytes(&self) -> Result<&[u8]> {
+        with_inner!(self.inner, ComdatInternal, |x| x.name_bytes())
+    }
+
+    fn name(&self) -> Result<&str> {
+        with_inner!(self.inner, ComdatInternal, |x| x.name())
+    }
+
+    fn sections(&self) -> ComdatSectionIterator<'data, 'file, R> {
+        ComdatSectionIterator {
+            inner: map_inner!(
+                self.inner,
+                ComdatInternal,
+                ComdatSectionIteratorInternal,
+                |x| x.sections()
+            ),
+        }
+    }
+}
+
+/// An iterator over COMDAT section entries.
+#[derive(Debug)]
+pub struct ComdatSectionIterator<'data, 'file, R: ReadRef<'data> = &'data [u8]>
+where
+    'data: 'file,
+{
+    inner: ComdatSectionIteratorInternal<'data, 'file, R>,
+}
+
+#[derive(Debug)]
+enum ComdatSectionIteratorInternal<'data, 'file, R: ReadRef<'data>>
+where
+    'data: 'file,
+{
+    #[cfg(feature = "coff")]
+    Coff(coff::CoffComdatSectionIterator<'data, 'file, R>),
+    #[cfg(feature = "elf")]
+    Elf32(elf::ElfComdatSectionIterator32<'data, 'file, Endianness, R>),
+    #[cfg(feature = "elf")]
+    Elf64(elf::ElfComdatSectionIterator64<'data, 'file, Endianness, R>),
+    #[cfg(feature = "macho")]
+    MachO32(macho::MachOComdatSectionIterator32<'data, 'file, Endianness, R>),
+    #[cfg(feature = "macho")]
+    MachO64(macho::MachOComdatSectionIterator64<'data, 'file, Endianness, R>),
+    #[cfg(feature = "pe")]
+    Pe32(pe::PeComdatSectionIterator32<'data, 'file, R>),
+    #[cfg(feature = "pe")]
+    Pe64(pe::PeComdatSectionIterator64<'data, 'file, R>),
+    #[cfg(feature = "wasm")]
+    Wasm(wasm::WasmComdatSectionIterator<'data, 'file, R>),
+    #[cfg(feature = "xcoff")]
+    Xcoff32(xcoff::XcoffComdatSectionIterator32<'data, 'file, R>),
+    #[cfg(feature = "xcoff")]
+    Xcoff64(xcoff::XcoffComdatSectionIterator64<'data, 'file, R>),
+}
+
+impl<'data, 'file, R: ReadRef<'data>> Iterator for ComdatSectionIterator<'data, 'file, R> {
+    type Item = SectionIndex;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        with_inner_mut!(self.inner, ComdatSectionIteratorInternal, |x| x.next())
+    }
+}
+
+/// A symbol table.
+#[derive(Debug)]
+pub struct SymbolTable<'data, 'file, R = &'data [u8]>
+where
+    'data: 'file,
+    R: ReadRef<'data>,
+{
+    inner: SymbolTableInternal<'data, 'file, R>,
+}
+
+#[derive(Debug)]
+enum SymbolTableInternal<'data, 'file, R>
+where
+    'data: 'file,
+    R: ReadRef<'data>,
+{
+    #[cfg(feature = "coff")]
+    Coff((coff::CoffSymbolTable<'data, 'file, R>, PhantomData<R>)),
+    #[cfg(feature = "elf")]
+    Elf32(
+        (
+            elf::ElfSymbolTable32<'data, 'file, Endianness, R>,
+            PhantomData<R>,
+        ),
+    ),
+    #[cfg(feature = "elf")]
+    Elf64(
+        (
+            elf::ElfSymbolTable64<'data, 'file, Endianness, R>,
+            PhantomData<R>,
+        ),
+    ),
+    #[cfg(feature = "macho")]
+    MachO32(
+        (
+            macho::MachOSymbolTable32<'data, 'file, Endianness, R>,
+            PhantomData<()>,
+        ),
+    ),
+    #[cfg(feature = "macho")]
+    MachO64(
+        (
+            macho::MachOSymbolTable64<'data, 'file, Endianness, R>,
+            PhantomData<()>,
+        ),
+    ),
+    #[cfg(feature = "pe")]
+    Pe32((coff::CoffSymbolTable<'data, 'file, R>, PhantomData<R>)),
+    #[cfg(feature = "pe")]
+    Pe64((coff::CoffSymbolTable<'data, 'file, R>, PhantomData<R>)),
+    #[cfg(feature = "wasm")]
+    Wasm((wasm::WasmSymbolTable<'data, 'file>, PhantomData<R>)),
+    #[cfg(feature = "xcoff")]
+    Xcoff32((xcoff::XcoffSymbolTable32<'data, 'file, R>, PhantomData<R>)),
+    #[cfg(feature = "xcoff")]
+    Xcoff64((xcoff::XcoffSymbolTable64<'data, 'file, R>, PhantomData<R>)),
+}
+
+impl<'data, 'file, R: ReadRef<'data>> read::private::Sealed for SymbolTable<'data, 'file, R> {}
+
+impl<'data, 'file, R: ReadRef<'data>> ObjectSymbolTable<'data> for SymbolTable<'data, 'file, R> {
+    type Symbol = Symbol<'data, 'file, R>;
+    type SymbolIterator = SymbolIterator<'data, 'file, R>;
+
+    fn symbols(&self) -> Self::SymbolIterator {
+        SymbolIterator {
+            inner: map_inner!(
+                self.inner,
+                SymbolTableInternal,
+                SymbolIteratorInternal,
+                |x| (x.0.symbols(), PhantomData)
+            ),
+        }
+    }
+
+    fn symbol_by_index(&self, index: SymbolIndex) -> Result<Self::Symbol> {
+        map_inner_option!(self.inner, SymbolTableInternal, SymbolInternal, |x| x
+            .0
+            .symbol_by_index(index)
+            .map(|x| (x, PhantomData)))
+        .map(|inner| Symbol { inner })
+    }
+}
+
+/// An iterator over symbol table entries.
+#[derive(Debug)]
+pub struct SymbolIterator<'data, 'file, R = &'data [u8]>
+where
+    'data: 'file,
+    R: ReadRef<'data>,
+{
+    inner: SymbolIteratorInternal<'data, 'file, R>,
+}
+
+#[derive(Debug)]
+enum SymbolIteratorInternal<'data, 'file, R>
+where
+    'data: 'file,
+    R: ReadRef<'data>,
+{
+    #[cfg(feature = "coff")]
+    Coff((coff::CoffSymbolIterator<'data, 'file, R>, PhantomData<R>)),
+    #[cfg(feature = "elf")]
+    Elf32(
+        (
+            elf::ElfSymbolIterator32<'data, 'file, Endianness, R>,
+            PhantomData<R>,
+        ),
+    ),
+    #[cfg(feature = "elf")]
+    Elf64(
+        (
+            elf::ElfSymbolIterator64<'data, 'file, Endianness, R>,
+            PhantomData<R>,
+        ),
+    ),
+    #[cfg(feature = "macho")]
+    MachO32(
+        (
+            macho::MachOSymbolIterator32<'data, 'file, Endianness, R>,
+            PhantomData<()>,
+        ),
+    ),
+    #[cfg(feature = "macho")]
+    MachO64(
+        (
+            macho::MachOSymbolIterator64<'data, 'file, Endianness, R>,
+            PhantomData<()>,
+        ),
+    ),
+    #[cfg(feature = "pe")]
+    Pe32((coff::CoffSymbolIterator<'data, 'file, R>, PhantomData<R>)),
+    #[cfg(feature = "pe")]
+    Pe64((coff::CoffSymbolIterator<'data, 'file, R>, PhantomData<R>)),
+    #[cfg(feature = "wasm")]
+    Wasm((wasm::WasmSymbolIterator<'data, 'file>, PhantomData<R>)),
+    #[cfg(feature = "xcoff")]
+    Xcoff32(
+        (
+            xcoff::XcoffSymbolIterator32<'data, 'file, R>,
+            PhantomData<R>,
+        ),
+    ),
+    #[cfg(feature = "xcoff")]
+    Xcoff64(
+        (
+            xcoff::XcoffSymbolIterator64<'data, 'file, R>,
+            PhantomData<R>,
+        ),
+    ),
+}
+
+impl<'data, 'file, R: ReadRef<'data>> Iterator for SymbolIterator<'data, 'file, R> {
+    type Item = Symbol<'data, 'file, R>;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        map_inner_option_mut!(self.inner, SymbolIteratorInternal, SymbolInternal, |iter| {
+            iter.0.next().map(|x| (x, PhantomData))
+        })
+        .map(|inner| Symbol { inner })
+    }
+}
+
+/// A symbol table entry.
+pub struct Symbol<'data, 'file, R = &'data [u8]>
+where
+    'data: 'file,
+    R: ReadRef<'data>,
+{
+    inner: SymbolInternal<'data, 'file, R>,
+}
+
+enum SymbolInternal<'data, 'file, R>
+where
+    'data: 'file,
+    R: ReadRef<'data>,
+{
+    #[cfg(feature = "coff")]
+    Coff((coff::CoffSymbol<'data, 'file, R>, PhantomData<R>)),
+    #[cfg(feature = "elf")]
+    Elf32(
+        (
+            elf::ElfSymbol32<'data, 'file, Endianness, R>,
+            PhantomData<R>,
+        ),
+    ),
+    #[cfg(feature = "elf")]
+    Elf64(
+        (
+            elf::ElfSymbol64<'data, 'file, Endianness, R>,
+            PhantomData<R>,
+        ),
+    ),
+    #[cfg(feature = "macho")]
+    MachO32(
+        (
+            macho::MachOSymbol32<'data, 'file, Endianness, R>,
+            PhantomData<()>,
+        ),
+    ),
+    #[cfg(feature = "macho")]
+    MachO64(
+        (
+            macho::MachOSymbol64<'data, 'file, Endianness, R>,
+            PhantomData<()>,
+        ),
+    ),
+    #[cfg(feature = "pe")]
+    Pe32((coff::CoffSymbol<'data, 'file, R>, PhantomData<R>)),
+    #[cfg(feature = "pe")]
+    Pe64((coff::CoffSymbol<'data, 'file, R>, PhantomData<R>)),
+    #[cfg(feature = "wasm")]
+    Wasm((wasm::WasmSymbol<'data, 'file>, PhantomData<R>)),
+    #[cfg(feature = "xcoff")]
+    Xcoff32((xcoff::XcoffSymbol32<'data, 'file, R>, PhantomData<R>)),
+    #[cfg(feature = "xcoff")]
+    Xcoff64((xcoff::XcoffSymbol64<'data, 'file, R>, PhantomData<R>)),
+}
+
+impl<'data, 'file, R: ReadRef<'data>> fmt::Debug for Symbol<'data, 'file, R> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("Symbol")
+            .field("name", &self.name().unwrap_or("<invalid>"))
+            .field("address", &self.address())
+            .field("size", &self.size())
+            .field("kind", &self.kind())
+            .field("section", &self.section())
+            .field("scope", &self.scope())
+            .field("weak", &self.is_weak())
+            .field("flags", &self.flags())
+            .finish()
+    }
+}
+
+impl<'data, 'file, R: ReadRef<'data>> read::private::Sealed for Symbol<'data, 'file, R> {}
+
+impl<'data, 'file, R: ReadRef<'data>> ObjectSymbol<'data> for Symbol<'data, 'file, R> {
+    fn index(&self) -> SymbolIndex {
+        with_inner!(self.inner, SymbolInternal, |x| x.0.index())
+    }
+
+    fn name_bytes(&self) -> Result<&'data [u8]> {
+        with_inner!(self.inner, SymbolInternal, |x| x.0.name_bytes())
+    }
+
+    fn name(&self) -> Result<&'data str> {
+        with_inner!(self.inner, SymbolInternal, |x| x.0.name())
+    }
+
+    fn address(&self) -> u64 {
+        with_inner!(self.inner, SymbolInternal, |x| x.0.address())
+    }
+
+    fn size(&self) -> u64 {
+        with_inner!(self.inner, SymbolInternal, |x| x.0.size())
+    }
+
+    fn kind(&self) -> SymbolKind {
+        with_inner!(self.inner, SymbolInternal, |x| x.0.kind())
+    }
+
+    fn section(&self) -> SymbolSection {
+        with_inner!(self.inner, SymbolInternal, |x| x.0.section())
+    }
+
+    fn is_undefined(&self) -> bool {
+        with_inner!(self.inner, SymbolInternal, |x| x.0.is_undefined())
+    }
+
+    fn is_definition(&self) -> bool {
+        with_inner!(self.inner, SymbolInternal, |x| x.0.is_definition())
+    }
+
+    fn is_common(&self) -> bool {
+        with_inner!(self.inner, SymbolInternal, |x| x.0.is_common())
+    }
+
+    fn is_weak(&self) -> bool {
+        with_inner!(self.inner, SymbolInternal, |x| x.0.is_weak())
+    }
+
+    fn scope(&self) -> SymbolScope {
+        with_inner!(self.inner, SymbolInternal, |x| x.0.scope())
+    }
+
+    fn is_global(&self) -> bool {
+        with_inner!(self.inner, SymbolInternal, |x| x.0.is_global())
+    }
+
+    fn is_local(&self) -> bool {
+        with_inner!(self.inner, SymbolInternal, |x| x.0.is_local())
+    }
+
+    fn flags(&self) -> SymbolFlags<SectionIndex> {
+        with_inner!(self.inner, SymbolInternal, |x| x.0.flags())
+    }
+}
+
+/// An iterator over dynamic relocation entries.
+#[derive(Debug)]
+pub struct DynamicRelocationIterator<'data, 'file, R = &'data [u8]>
+where
+    'data: 'file,
+    R: ReadRef<'data>,
+{
+    inner: DynamicRelocationIteratorInternal<'data, 'file, R>,
+}
+
+#[derive(Debug)]
+enum DynamicRelocationIteratorInternal<'data, 'file, R>
+where
+    'data: 'file,
+    R: ReadRef<'data>,
+{
+    #[cfg(feature = "elf")]
+    Elf32(elf::ElfDynamicRelocationIterator32<'data, 'file, Endianness, R>),
+    #[cfg(feature = "elf")]
+    Elf64(elf::ElfDynamicRelocationIterator64<'data, 'file, Endianness, R>),
+    // We need to always use the lifetime parameters.
+    #[allow(unused)]
+    None(PhantomData<(&'data (), &'file (), R)>),
+}
+
+impl<'data, 'file, R: ReadRef<'data>> Iterator for DynamicRelocationIterator<'data, 'file, R> {
+    type Item = (u64, Relocation);
+
+    fn next(&mut self) -> Option<Self::Item> {
+        match self.inner {
+            #[cfg(feature = "elf")]
+            DynamicRelocationIteratorInternal::Elf32(ref mut elf) => elf.next(),
+            #[cfg(feature = "elf")]
+            DynamicRelocationIteratorInternal::Elf64(ref mut elf) => elf.next(),
+            DynamicRelocationIteratorInternal::None(_) => None,
+        }
+    }
+}
+
+/// An iterator over section relocation entries.
+#[derive(Debug)]
+pub struct SectionRelocationIterator<'data, 'file, R: ReadRef<'data> = &'data [u8]>
+where
+    'data: 'file,
+{
+    inner: SectionRelocationIteratorInternal<'data, 'file, R>,
+}
+
+#[derive(Debug)]
+enum SectionRelocationIteratorInternal<'data, 'file, R: ReadRef<'data>>
+where
+    'data: 'file,
+{
+    #[cfg(feature = "coff")]
+    Coff(coff::CoffRelocationIterator<'data, 'file, R>),
+    #[cfg(feature = "elf")]
+    Elf32(elf::ElfSectionRelocationIterator32<'data, 'file, Endianness, R>),
+    #[cfg(feature = "elf")]
+    Elf64(elf::ElfSectionRelocationIterator64<'data, 'file, Endianness, R>),
+    #[cfg(feature = "macho")]
+    MachO32(macho::MachORelocationIterator32<'data, 'file, Endianness, R>),
+    #[cfg(feature = "macho")]
+    MachO64(macho::MachORelocationIterator64<'data, 'file, Endianness, R>),
+    #[cfg(feature = "pe")]
+    Pe32(pe::PeRelocationIterator<'data, 'file, R>),
+    #[cfg(feature = "pe")]
+    Pe64(pe::PeRelocationIterator<'data, 'file, R>),
+    #[cfg(feature = "wasm")]
+    Wasm(wasm::WasmRelocationIterator<'data, 'file, R>),
+    #[cfg(feature = "xcoff")]
+    Xcoff32(xcoff::XcoffRelocationIterator32<'data, 'file, R>),
+    #[cfg(feature = "xcoff")]
+    Xcoff64(xcoff::XcoffRelocationIterator64<'data, 'file, R>),
+}
+
+impl<'data, 'file, R: ReadRef<'data>> Iterator for SectionRelocationIterator<'data, 'file, R> {
+    type Item = (u64, Relocation);
+
+    fn next(&mut self) -> Option<Self::Item> {
+        with_inner_mut!(self.inner, SectionRelocationIteratorInternal, |x| x.next())
+    }
+}
diff --git a/third_party/rust/object/src/read/archive.rs b/third_party/rust/object/src/read/archive.rs
new file mode 100644
index 0000000000..f5aaa9b190
--- /dev/null
+++ b/third_party/rust/object/src/read/archive.rs
@@ -0,0 +1,739 @@
+//! Support for archive files.
+
+use core::convert::TryInto;
+
+use crate::archive;
+use crate::read::{self, Bytes, Error, ReadError, ReadRef};
+
+/// The kind of archive format.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+#[non_exhaustive]
+pub enum ArchiveKind {
+    /// There are no special files that indicate the archive format.
+    Unknown,
+    /// The GNU (or System V) archive format.
+    Gnu,
+    /// The GNU (or System V) archive format with 64-bit symbol table.
+    Gnu64,
+    /// The BSD archive format.
+    Bsd,
+    /// The BSD archive format with 64-bit symbol table.
+    ///
+    /// This is used for Darwin.
+    Bsd64,
+    /// The Windows COFF archive format.
+    Coff,
+    /// The AIX big archive format.
+    AixBig,
+}
+
+/// The list of members in the archive.
+#[derive(Debug, Clone, Copy)]
+enum Members<'data> {
+    Common {
+        offset: u64,
+        end_offset: u64,
+    },
+    AixBig {
+        index: &'data [archive::AixMemberOffset],
+    },
+}
+
+/// A partially parsed archive file.
+#[derive(Debug, Clone, Copy)]
+pub struct ArchiveFile<'data, R: ReadRef<'data> = &'data [u8]> {
+    data: R,
+    kind: ArchiveKind,
+    members: Members<'data>,
+    symbols: (u64, u64),
+    names: &'data [u8],
+}
+
+impl<'data, R: ReadRef<'data>> ArchiveFile<'data, R> {
+    /// Parse the archive header and special members.
+    pub fn parse(data: R) -> read::Result<Self> {
+        let len = data.len().read_error("Unknown archive length")?;
+        let mut tail = 0;
+        let magic = data
+            .read_bytes(&mut tail, archive::MAGIC.len() as u64)
+            .read_error("Invalid archive size")?;
+
+        if magic == archive::AIX_BIG_MAGIC {
+            return Self::parse_aixbig(data);
+        } else if magic != archive::MAGIC {
+            return Err(Error("Unsupported archive identifier"));
+        }
+
+        let mut members_offset = tail;
+        let members_end_offset = len;
+
+        let mut file = ArchiveFile {
+            data,
+            kind: ArchiveKind::Unknown,
+            members: Members::Common {
+                offset: 0,
+                end_offset: 0,
+            },
+            symbols: (0, 0),
+            names: &[],
+        };
+
+        // The first few members may be special, so parse them.
+        // GNU has:
+        // - "/" or "/SYM64/": symbol table (optional)
+        // - "//": names table (optional)
+        // COFF has:
+        // - "/": first linker member
+        // - "/": second linker member
+        // - "//": names table
+        // BSD has:
+        // - "__.SYMDEF" or "__.SYMDEF SORTED": symbol table (optional)
+        // BSD 64-bit has:
+        // - "__.SYMDEF_64" or "__.SYMDEF_64 SORTED": symbol table (optional)
+        // BSD may use the extended name for the symbol table. This is handled
+        // by `ArchiveMember::parse`.
+        if tail < len {
+            let member = ArchiveMember::parse(data, &mut tail, &[])?;
+            if member.name == b"/" {
+                // GNU symbol table (unless we later determine this is COFF).
+                file.kind = ArchiveKind::Gnu;
+                file.symbols = member.file_range();
+                members_offset = tail;
+
+                if tail < len {
+                    let member = ArchiveMember::parse(data, &mut tail, &[])?;
+                    if member.name == b"/" {
+                        // COFF linker member.
+                        file.kind = ArchiveKind::Coff;
+                        file.symbols = member.file_range();
+                        members_offset = tail;
+
+                        if tail < len {
+                            let member = ArchiveMember::parse(data, &mut tail, &[])?;
+                            if member.name == b"//" {
+                                // COFF names table.
+                                file.names = member.data(data)?;
+                                members_offset = tail;
+                            }
+                        }
+                    } else if member.name == b"//" {
+                        // GNU names table.
+                        file.names = member.data(data)?;
+                        members_offset = tail;
+                    }
+                }
+            } else if member.name == b"/SYM64/" {
+                // GNU 64-bit symbol table.
+                file.kind = ArchiveKind::Gnu64;
+                file.symbols = member.file_range();
+                members_offset = tail;
+
+                if tail < len {
+                    let member = ArchiveMember::parse(data, &mut tail, &[])?;
+                    if member.name == b"//" {
+                        // GNU names table.
+                        file.names = member.data(data)?;
+                        members_offset = tail;
+                    }
+                }
+            } else if member.name == b"//" {
+                // GNU names table.
+                file.kind = ArchiveKind::Gnu;
+                file.names = member.data(data)?;
+                members_offset = tail;
+            } else if member.name == b"__.SYMDEF" || member.name == b"__.SYMDEF SORTED" {
+                // BSD symbol table.
+                file.kind = ArchiveKind::Bsd;
+                file.symbols = member.file_range();
+                members_offset = tail;
+            } else if member.name == b"__.SYMDEF_64" || member.name == b"__.SYMDEF_64 SORTED" {
+                // BSD 64-bit symbol table.
+                file.kind = ArchiveKind::Bsd64;
+                file.symbols = member.file_range();
+                members_offset = tail;
+            } else {
+                // TODO: This could still be a BSD file. We leave this as unknown for now.
+            }
+        }
+        file.members = Members::Common {
+            offset: members_offset,
+            end_offset: members_end_offset,
+        };
+        Ok(file)
+    }
+
+    fn parse_aixbig(data: R) -> read::Result<Self> {
+        let mut tail = 0;
+
+        let file_header = data
+            .read::<archive::AixFileHeader>(&mut tail)
+            .read_error("Invalid AIX big archive file header")?;
+        // Caller already validated this.
+        debug_assert_eq!(file_header.magic, archive::AIX_BIG_MAGIC);
+
+        let mut file = ArchiveFile {
+            data,
+            kind: ArchiveKind::AixBig,
+            members: Members::AixBig { index: &[] },
+            symbols: (0, 0),
+            names: &[],
+        };
+
+        // Read the span of symbol table.
+        let symtbl64 = parse_u64_digits(&file_header.gst64off, 10)
+            .read_error("Invalid offset to 64-bit symbol table in AIX big archive")?;
+        if symtbl64 > 0 {
+            // The symbol table is also a file with header.
+            let member = ArchiveMember::parse_aixbig(data, symtbl64)?;
+            file.symbols = member.file_range();
+        } else {
+            let symtbl = parse_u64_digits(&file_header.gstoff, 10)
+                .read_error("Invalid offset to symbol table in AIX big archive")?;
+            if symtbl > 0 {
+                // The symbol table is also a file with header.
+                let member = ArchiveMember::parse_aixbig(data, symtbl)?;
+                file.symbols = member.file_range();
+            }
+        }
+
+        // Big archive member index table lists file entries with offsets and names.
+        // To avoid potential infinite loop (members are double-linked list), the
+        // iterator goes through the index instead of real members.
+        let member_table_offset = parse_u64_digits(&file_header.memoff, 10)
+            .read_error("Invalid offset for member table of AIX big archive")?;
+        if member_table_offset == 0 {
+            // The offset would be zero if archive contains no file.
+            return Ok(file);
+        }
+
+        // The member index table is also a file with header.
+        let member = ArchiveMember::parse_aixbig(data, member_table_offset)?;
+        let mut member_data = Bytes(member.data(data)?);
+
+        // Structure of member index table:
+        // Number of entries (20 bytes)
+        // Offsets of each entry (20*N bytes)
+        // Names string table (the rest of bytes to fill size defined in header)
+        let members_count_bytes = member_data
+            .read_slice::<u8>(20)
+            .read_error("Missing member count in AIX big archive")?;
+        let members_count = parse_u64_digits(members_count_bytes, 10)
+            .and_then(|size| size.try_into().ok())
+            .read_error("Invalid member count in AIX big archive")?;
+        let index = member_data
+            .read_slice::<archive::AixMemberOffset>(members_count)
+            .read_error("Member count overflow in AIX big archive")?;
+        file.members = Members::AixBig { index };
+
+        Ok(file)
+    }
+
+    /// Return the archive format.
+    #[inline]
+    pub fn kind(&self) -> ArchiveKind {
+        self.kind
+    }
+
+    /// Iterate over the members of the archive.
+    ///
+    /// This does not return special members.
+    #[inline]
+    pub fn members(&self) -> ArchiveMemberIterator<'data, R> {
+        ArchiveMemberIterator {
+            data: self.data,
+            members: self.members,
+            names: self.names,
+        }
+    }
+}
+
+/// An iterator over the members of an archive.
+#[derive(Debug)]
+pub struct ArchiveMemberIterator<'data, R: ReadRef<'data> = &'data [u8]> {
+    data: R,
+    members: Members<'data>,
+    names: &'data [u8],
+}
+
+impl<'data, R: ReadRef<'data>> Iterator for ArchiveMemberIterator<'data, R> {
+    type Item = read::Result<ArchiveMember<'data>>;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        match &mut self.members {
+            Members::Common {
+                ref mut offset,
+                ref mut end_offset,
+            } => {
+                if *offset >= *end_offset {
+                    return None;
+                }
+                let member = ArchiveMember::parse(self.data, offset, self.names);
+                if member.is_err() {
+                    *offset = *end_offset;
+                }
+                Some(member)
+            }
+            Members::AixBig { ref mut index } => match **index {
+                [] => None,
+                [ref first, ref rest @ ..] => {
+                    *index = rest;
+                    let member = ArchiveMember::parse_aixbig_index(self.data, first);
+                    if member.is_err() {
+                        *index = &[];
+                    }
+                    Some(member)
+                }
+            },
+        }
+    }
+}
+
+/// An archive member header.
+#[derive(Debug, Clone, Copy)]
+enum MemberHeader<'data> {
+    /// Common header used by many formats.
+    Common(&'data archive::Header),
+    /// AIX big archive header
+    AixBig(&'data archive::AixHeader),
+}
+
+/// A partially parsed archive member.
+#[derive(Debug)]
+pub struct ArchiveMember<'data> {
+    header: MemberHeader<'data>,
+    name: &'data [u8],
+    offset: u64,
+    size: u64,
+}
+
+impl<'data> ArchiveMember<'data> {
+    /// Parse the member header, name, and file data in an archive with the common format.
+    ///
+    /// This reads the extended name (if any) and adjusts the file size.
+    fn parse<R: ReadRef<'data>>(
+        data: R,
+        offset: &mut u64,
+        names: &'data [u8],
+    ) -> read::Result<Self> {
+        let header = data
+            .read::<archive::Header>(offset)
+            .read_error("Invalid archive member header")?;
+        if header.terminator != archive::TERMINATOR {
+            return Err(Error("Invalid archive terminator"));
+        }
+
+        let mut file_offset = *offset;
+        let mut file_size =
+            parse_u64_digits(&header.size, 10).read_error("Invalid archive member size")?;
+        *offset = offset
+            .checked_add(file_size)
+            .read_error("Archive member size is too large")?;
+        // Entries are padded to an even number of bytes.
+        if (file_size & 1) != 0 {
+            *offset = offset.saturating_add(1);
+        }
+
+        let name = if header.name[0] == b'/' && (header.name[1] as char).is_ascii_digit() {
+            // Read file name from the names table.
+            parse_sysv_extended_name(&header.name[1..], names)
+                .read_error("Invalid archive extended name offset")?
+        } else if &header.name[..3] == b"#1/" && (header.name[3] as char).is_ascii_digit() {
+            // Read file name from the start of the file data.
+            parse_bsd_extended_name(&header.name[3..], data, &mut file_offset, &mut file_size)
+                .read_error("Invalid archive extended name length")?
+        } else if header.name[0] == b'/' {
+            let name_len = memchr::memchr(b' ', &header.name).unwrap_or(header.name.len());
+            &header.name[..name_len]
+        } else {
+            let name_len = memchr::memchr(b'/', &header.name)
+                .or_else(|| memchr::memchr(b' ', &header.name))
+                .unwrap_or(header.name.len());
+            &header.name[..name_len]
+        };
+
+        Ok(ArchiveMember {
+            header: MemberHeader::Common(header),
+            name,
+            offset: file_offset,
+            size: file_size,
+        })
+    }
+
+    /// Parse a member index entry in an AIX big archive,
+    /// and then parse the member header, name, and file data.
+    fn parse_aixbig_index<R: ReadRef<'data>>(
+        data: R,
+        index: &archive::AixMemberOffset,
+    ) -> read::Result<Self> {
+        let offset = parse_u64_digits(&index.0, 10)
+            .read_error("Invalid AIX big archive file member offset")?;
+        Self::parse_aixbig(data, offset)
+    }
+
+    /// Parse the member header, name, and file data in an AIX big archive.
+    fn parse_aixbig<R: ReadRef<'data>>(data: R, mut offset: u64) -> read::Result<Self> {
+        // The format was described at
+        // https://www.ibm.com/docs/en/aix/7.3?topic=formats-ar-file-format-big
+        let header = data
+            .read::<archive::AixHeader>(&mut offset)
+            .read_error("Invalid AIX big archive member header")?;
+        let name_length = parse_u64_digits(&header.namlen, 10)
+            .read_error("Invalid AIX big archive member name length")?;
+        let name = data
+            .read_bytes(&mut offset, name_length)
+            .read_error("Invalid AIX big archive member name")?;
+
+        // The actual data for a file member begins at the first even-byte boundary beyond the
+        // member header and continues for the number of bytes specified by the ar_size field. The
+        // ar command inserts null bytes for padding where necessary.
+        if offset & 1 != 0 {
+            offset = offset.saturating_add(1);
+        }
+        // Because of the even-byte boundary, we have to read and check terminator after header.
+        let terminator = data
+            .read_bytes(&mut offset, 2)
+            .read_error("Invalid AIX big archive terminator")?;
+        if terminator != archive::TERMINATOR {
+            return Err(Error("Invalid AIX big archive terminator"));
+        }
+
+        let size = parse_u64_digits(&header.size, 10)
+            .read_error("Invalid archive member size in AIX big archive")?;
+        Ok(ArchiveMember {
+            header: MemberHeader::AixBig(header),
+            name,
+            offset,
+            size,
+        })
+    }
+
+    /// Return the raw header that is common to many archive formats.
+    ///
+    /// Returns `None` if this archive does not use the common header format.
+    #[inline]
+    pub fn header(&self) -> Option<&'data archive::Header> {
+        match self.header {
+            MemberHeader::Common(header) => Some(header),
+            _ => None,
+        }
+    }
+
+    /// Return the raw header for AIX big archives.
+    ///
+    /// Returns `None` if this is not an AIX big archive.
+    #[inline]
+    pub fn aix_header(&self) -> Option<&'data archive::AixHeader> {
+        match self.header {
+            MemberHeader::AixBig(header) => Some(header),
+            _ => None,
+        }
+    }
+
+    /// Return the parsed file name.
+    ///
+    /// This may be an extended file name.
+    #[inline]
+    pub fn name(&self) -> &'data [u8] {
+        self.name
+    }
+
+    /// Parse the file modification timestamp from the header.
+    #[inline]
+    pub fn date(&self) -> Option<u64> {
+        match &self.header {
+            MemberHeader::Common(header) => parse_u64_digits(&header.date, 10),
+            MemberHeader::AixBig(header) => parse_u64_digits(&header.date, 10),
+        }
+    }
+
+    /// Parse the user ID from the header.
+    #[inline]
+    pub fn uid(&self) -> Option<u64> {
+        match &self.header {
+            MemberHeader::Common(header) => parse_u64_digits(&header.uid, 10),
+            MemberHeader::AixBig(header) => parse_u64_digits(&header.uid, 10),
+        }
+    }
+
+    /// Parse the group ID from the header.
+    #[inline]
+    pub fn gid(&self) -> Option<u64> {
+        match &self.header {
+            MemberHeader::Common(header) => parse_u64_digits(&header.gid, 10),
+            MemberHeader::AixBig(header) => parse_u64_digits(&header.gid, 10),
+        }
+    }
+
+    /// Parse the file mode from the header.
+    #[inline]
+    pub fn mode(&self) -> Option<u64> {
+        match &self.header {
+            MemberHeader::Common(header) => parse_u64_digits(&header.mode, 8),
+            MemberHeader::AixBig(header) => parse_u64_digits(&header.mode, 8),
+        }
+    }
+
+    /// Return the offset and size of the file data.
+    pub fn file_range(&self) -> (u64, u64) {
+        (self.offset, self.size)
+    }
+
+    /// Return the file data.
+    #[inline]
+    pub fn data<R: ReadRef<'data>>(&self, data: R) -> read::Result<&'data [u8]> {
+        data.read_bytes_at(self.offset, self.size)
+            .read_error("Archive member size is too large")
+    }
+}
+
+// Ignores bytes starting from the first space.
+fn parse_u64_digits(digits: &[u8], radix: u32) -> Option<u64> {
+    if let [b' ', ..] = digits {
+        return None;
+    }
+    let mut result: u64 = 0;
+    for &c in digits {
+        if c == b' ' {
+            return Some(result);
+        } else {
+            let x = (c as char).to_digit(radix)?;
+            result = result
+                .checked_mul(u64::from(radix))?
+                .checked_add(u64::from(x))?;
+        }
+    }
+    Some(result)
+}
+
+fn parse_sysv_extended_name<'data>(digits: &[u8], names: &'data [u8]) -> Result<&'data [u8], ()> {
+    let offset = parse_u64_digits(digits, 10).ok_or(())?;
+    let offset = offset.try_into().map_err(|_| ())?;
+    let name_data = names.get(offset..).ok_or(())?;
+    let name = match memchr::memchr2(b'/', b'\0', name_data) {
+        Some(len) => &name_data[..len],
+        None => name_data,
+    };
+    Ok(name)
+}
+
+/// Modifies `data` to start after the extended name.
+fn parse_bsd_extended_name<'data, R: ReadRef<'data>>(
+    digits: &[u8],
+    data: R,
+    offset: &mut u64,
+    size: &mut u64,
+) -> Result<&'data [u8], ()> {
+    let len = parse_u64_digits(digits, 10).ok_or(())?;
+    *size = size.checked_sub(len).ok_or(())?;
+    let name_data = data.read_bytes(offset, len)?;
+    let name = match memchr::memchr(b'\0', name_data) {
+        Some(len) => &name_data[..len],
+        None => name_data,
+    };
+    Ok(name)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn kind() {
+        let data = b"!<arch>\n";
+        let archive = ArchiveFile::parse(&data[..]).unwrap();
+        assert_eq!(archive.kind(), ArchiveKind::Unknown);
+
+        let data = b"\
+            !<arch>\n\
+            /                                               4         `\n\
+            0000";
+        let archive = ArchiveFile::parse(&data[..]).unwrap();
+        assert_eq!(archive.kind(), ArchiveKind::Gnu);
+
+        let data = b"\
+            !<arch>\n\
+            //                                              4         `\n\
+            0000";
+        let archive = ArchiveFile::parse(&data[..]).unwrap();
+        assert_eq!(archive.kind(), ArchiveKind::Gnu);
+
+        let data = b"\
+            !<arch>\n\
+            /                                               4         `\n\
+            0000\
+            //                                              4         `\n\
+            0000";
+        let archive = ArchiveFile::parse(&data[..]).unwrap();
+        assert_eq!(archive.kind(), ArchiveKind::Gnu);
+
+        let data = b"\
+            !<arch>\n\
+            /SYM64/                                         4         `\n\
+            0000";
+        let archive = ArchiveFile::parse(&data[..]).unwrap();
+        assert_eq!(archive.kind(), ArchiveKind::Gnu64);
+
+        let data = b"\
+            !<arch>\n\
+            /SYM64/                                         4         `\n\
+            0000\
+            //                                              4         `\n\
+            0000";
+        let archive = ArchiveFile::parse(&data[..]).unwrap();
+        assert_eq!(archive.kind(), ArchiveKind::Gnu64);
+
+        let data = b"\
+            !<arch>\n\
+            __.SYMDEF                                       4         `\n\
+            0000";
+        let archive = ArchiveFile::parse(&data[..]).unwrap();
+        assert_eq!(archive.kind(), ArchiveKind::Bsd);
+
+        let data = b"\
+            !<arch>\n\
+            #1/9                                            13        `\n\
+            __.SYMDEF0000";
+        let archive = ArchiveFile::parse(&data[..]).unwrap();
+        assert_eq!(archive.kind(), ArchiveKind::Bsd);
+
+        let data = b"\
+            !<arch>\n\
+            #1/16                                           20        `\n\
+            __.SYMDEF SORTED0000";
+        let archive = ArchiveFile::parse(&data[..]).unwrap();
+        assert_eq!(archive.kind(), ArchiveKind::Bsd);
+
+        let data = b"\
+            !<arch>\n\
+            __.SYMDEF_64                                    4         `\n\
+            0000";
+        let archive = ArchiveFile::parse(&data[..]).unwrap();
+        assert_eq!(archive.kind(), ArchiveKind::Bsd64);
+
+        let data = b"\
+            !<arch>\n\
+            #1/12                                           16        `\n\
+            __.SYMDEF_640000";
+        let archive = ArchiveFile::parse(&data[..]).unwrap();
+        assert_eq!(archive.kind(), ArchiveKind::Bsd64);
+
+        let data = b"\
+            !<arch>\n\
+            #1/19                                           23        `\n\
+            __.SYMDEF_64 SORTED0000";
+        let archive = ArchiveFile::parse(&data[..]).unwrap();
+        assert_eq!(archive.kind(), ArchiveKind::Bsd64);
+
+        let data = b"\
+            !<arch>\n\
+            /                                               4         `\n\
+            0000\
+            /                                               4         `\n\
+            0000\
+            //                                              4         `\n\
+            0000";
+        let archive = ArchiveFile::parse(&data[..]).unwrap();
+        assert_eq!(archive.kind(), ArchiveKind::Coff);
+
+        let data = b"\
+            <bigaf>\n\
+            0                   0                   \
+            0                   0                   \
+            0                   128                 \
+            6                   0                   \
+            0                   \0\0\0\0\0\0\0\0\0\0\0\0\
+            \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
+            \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
+            \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0";
+        let archive = ArchiveFile::parse(&data[..]).unwrap();
+        assert_eq!(archive.kind(), ArchiveKind::AixBig);
+    }
+
+    #[test]
+    fn gnu_names() {
+        let data = b"\
+            !<arch>\n\
+            //                                              18        `\n\
+            0123456789abcdef/\n\
+            s p a c e/      0           0     0     644     4         `\n\
+            0000\
+            0123456789abcde/0           0     0     644     3         `\n\
+            odd\n\
+            /0              0           0     0     644     4         `\n\
+            even";
+        let data = &data[..];
+        let archive = ArchiveFile::parse(data).unwrap();
+        assert_eq!(archive.kind(), ArchiveKind::Gnu);
+        let mut members = archive.members();
+
+        let member = members.next().unwrap().unwrap();
+        assert_eq!(member.name(), b"s p a c e");
+        assert_eq!(member.data(data).unwrap(), &b"0000"[..]);
+
+        let member = members.next().unwrap().unwrap();
+        assert_eq!(member.name(), b"0123456789abcde");
+        assert_eq!(member.data(data).unwrap(), &b"odd"[..]);
+
+        let member = members.next().unwrap().unwrap();
+        assert_eq!(member.name(), b"0123456789abcdef");
+        assert_eq!(member.data(data).unwrap(), &b"even"[..]);
+
+        assert!(members.next().is_none());
+    }
+
+    #[test]
+    fn bsd_names() {
+        let data = b"\
+            !<arch>\n\
+            0123456789abcde 0           0     0     644     3         `\n\
+            odd\n\
+            #1/16           0           0     0     644     20        `\n\
+            0123456789abcdefeven";
+        let data = &data[..];
+        let archive = ArchiveFile::parse(data).unwrap();
+        assert_eq!(archive.kind(), ArchiveKind::Unknown);
+        let mut members = archive.members();
+
+        let member = members.next().unwrap().unwrap();
+        assert_eq!(member.name(), b"0123456789abcde");
+        assert_eq!(member.data(data).unwrap(), &b"odd"[..]);
+
+        let member = members.next().unwrap().unwrap();
+        assert_eq!(member.name(), b"0123456789abcdef");
+        assert_eq!(member.data(data).unwrap(), &b"even"[..]);
+
+        assert!(members.next().is_none());
+    }
+
+    #[test]
+    fn aix_names() {
+        let data = b"\
+            <bigaf>\n\
+            396                 0                   0                   \
+            128                 262                 0                   \
+            4                   262                 0                   \
+            1662610370  223         1           644         16  \
+            0123456789abcdef`\nord\n\
+            4                   396                 128                 \
+            1662610374  223         1           644         16  \
+            fedcba9876543210`\nrev\n\
+            94                  0                   262                 \
+            0           0           0           0           0   \
+            `\n2                   128                 \
+            262                 0123456789abcdef\0fedcba9876543210\0";
+        let data = &data[..];
+        let archive = ArchiveFile::parse(data).unwrap();
+        assert_eq!(archive.kind(), ArchiveKind::AixBig);
+        let mut members = archive.members();
+
+        let member = members.next().unwrap().unwrap();
+        assert_eq!(member.name(), b"0123456789abcdef");
+        assert_eq!(member.data(data).unwrap(), &b"ord\n"[..]);
+
+        let member = members.next().unwrap().unwrap();
+        assert_eq!(member.name(), b"fedcba9876543210");
+        assert_eq!(member.data(data).unwrap(), &b"rev\n"[..]);
+
+        assert!(members.next().is_none());
+    }
+}
diff --git a/third_party/rust/object/src/read/coff/comdat.rs b/third_party/rust/object/src/read/coff/comdat.rs
new file mode 100644
index 0000000000..3be69ecc2b
--- /dev/null
+++ b/third_party/rust/object/src/read/coff/comdat.rs
@@ -0,0 +1,167 @@
+use core::str;
+
+use crate::endian::LittleEndian as LE;
+use crate::pe;
+use crate::read::{
+    self, ComdatKind, ObjectComdat, ReadError, ReadRef, Result, SectionIndex, SymbolIndex,
+};
+
+use super::CoffFile;
+
+/// An iterator over the COMDAT section groups of a `CoffFile`.
+#[derive(Debug)]
+pub struct CoffComdatIterator<'data, 'file, R: ReadRef<'data> = &'data [u8]> {
+    pub(super) file: &'file CoffFile<'data, R>,
+    pub(super) index: usize,
+}
+
+impl<'data, 'file, R: ReadRef<'data>> Iterator for CoffComdatIterator<'data, 'file, R> {
+    type Item = CoffComdat<'data, 'file, R>;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        loop {
+            let index = self.index;
+            let symbol = self.file.common.symbols.symbol(index).ok()?;
+            self.index += 1 + symbol.number_of_aux_symbols as usize;
+            if let Some(comdat) = CoffComdat::parse(self.file, symbol, index) {
+                return Some(comdat);
+            }
+        }
+    }
+}
+
+/// A COMDAT section group of a `CoffFile`.
+#[derive(Debug)]
+pub struct CoffComdat<'data, 'file, R: ReadRef<'data> = &'data [u8]> {
+    file: &'file CoffFile<'data, R>,
+    symbol_index: SymbolIndex,
+    symbol: &'data pe::ImageSymbol,
+    selection: u8,
+}
+
+impl<'data, 'file, R: ReadRef<'data>> CoffComdat<'data, 'file, R> {
+    fn parse(
+        file: &'file CoffFile<'data, R>,
+        section_symbol: &'data pe::ImageSymbol,
+        index: usize,
+    ) -> Option<CoffComdat<'data, 'file, R>> {
+        // Must be a section symbol.
+        if !section_symbol.has_aux_section() {
+            return None;
+        }
+
+        // Auxiliary record must have a non-associative selection.
+        let aux = file.common.symbols.aux_section(index).ok()?;
+        let selection = aux.selection;
+        if selection == 0 || selection == pe::IMAGE_COMDAT_SELECT_ASSOCIATIVE {
+            return None;
+        }
+
+        // Find the COMDAT symbol.
+        let mut symbol_index = index;
+        let mut symbol = section_symbol;
+        let section_number = section_symbol.section_number.get(LE);
+        loop {
+            symbol_index += 1 + symbol.number_of_aux_symbols as usize;
+            symbol = file.common.symbols.symbol(symbol_index).ok()?;
+            if section_number == symbol.section_number.get(LE) {
+                break;
+            }
+        }
+
+        Some(CoffComdat {
+            file,
+            symbol_index: SymbolIndex(symbol_index),
+            symbol,
+            selection,
+        })
+    }
+}
+
+impl<'data, 'file, R: ReadRef<'data>> read::private::Sealed for CoffComdat<'data, 'file, R> {}
+
+impl<'data, 'file, R: ReadRef<'data>> ObjectComdat<'data> for CoffComdat<'data, 'file, R> {
+    type SectionIterator = CoffComdatSectionIterator<'data, 'file, R>;
+
+    #[inline]
+    fn kind(&self) -> ComdatKind {
+        match self.selection {
+            pe::IMAGE_COMDAT_SELECT_NODUPLICATES => ComdatKind::NoDuplicates,
+            pe::IMAGE_COMDAT_SELECT_ANY => ComdatKind::Any,
+            pe::IMAGE_COMDAT_SELECT_SAME_SIZE => ComdatKind::SameSize,
+            pe::IMAGE_COMDAT_SELECT_EXACT_MATCH => ComdatKind::ExactMatch,
+            pe::IMAGE_COMDAT_SELECT_LARGEST => ComdatKind::Largest,
+            pe::IMAGE_COMDAT_SELECT_NEWEST => ComdatKind::Newest,
+            _ => ComdatKind::Unknown,
+        }
+    }
+
+    #[inline]
+    fn symbol(&self) -> SymbolIndex {
+        self.symbol_index
+    }
+
+    #[inline]
+    fn name_bytes(&self) -> Result<&[u8]> {
+        // Find the name of first symbol referring to the section.
+        self.symbol.name(self.file.common.symbols.strings())
+    }
+
+    #[inline]
+    fn name(&self) -> Result<&str> {
+        let bytes = self.name_bytes()?;
+        str::from_utf8(bytes)
+            .ok()
+            .read_error("Non UTF-8 COFF COMDAT name")
+    }
+
+    #[inline]
+    fn sections(&self) -> Self::SectionIterator {
+        CoffComdatSectionIterator {
+            file: self.file,
+            section_number: self.symbol.section_number.get(LE),
+            index: 0,
+        }
+    }
+}
+
+/// An iterator over the sections in a COMDAT section group of a `CoffFile`.
+#[derive(Debug)]
+pub struct CoffComdatSectionIterator<'data, 'file, R: ReadRef<'data> = &'data [u8]> {
+    file: &'file CoffFile<'data, R>,
+    section_number: u16,
+    index: usize,
+}
+
+impl<'data, 'file, R: ReadRef<'data>> Iterator for CoffComdatSectionIterator<'data, 'file, R> {
+    type Item = SectionIndex;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        // Find associated COMDAT symbols.
+        // TODO: it seems gcc doesn't use associated symbols for this
+        loop {
+            let index = self.index;
+            let symbol = self.file.common.symbols.symbol(index).ok()?;
+            self.index += 1 + symbol.number_of_aux_symbols as usize;
+
+            // Must be a section symbol.
+            if !symbol.has_aux_section() {
+                continue;
+            }
+
+            let section_number = symbol.section_number.get(LE);
+
+            let aux = self.file.common.symbols.aux_section(index).ok()?;
+            if aux.selection == pe::IMAGE_COMDAT_SELECT_ASSOCIATIVE {
+                // TODO: use high_number for bigobj
+                if aux.number.get(LE) == self.section_number {
+                    return Some(SectionIndex(section_number as usize));
+                }
+            } else if aux.selection != 0 {
+                if section_number == self.section_number {
+                    return Some(SectionIndex(section_number as usize));
+                }
+            }
+        }
+    }
+}
diff --git a/third_party/rust/object/src/read/coff/file.rs b/third_party/rust/object/src/read/coff/file.rs
new file mode 100644
index 0000000000..c6cc9f8460
--- /dev/null
+++ b/third_party/rust/object/src/read/coff/file.rs
@@ -0,0 +1,247 @@
+use alloc::vec::Vec;
+
+use crate::read::{
+    self, Architecture, Export, FileFlags, Import, NoDynamicRelocationIterator, Object, ObjectKind,
+    ObjectSection, ReadError, ReadRef, Result, SectionIndex, SymbolIndex,
+};
+use crate::{pe, LittleEndian as LE};
+
+use super::{
+    CoffComdat, CoffComdatIterator, CoffSection, CoffSectionIterator, CoffSegment,
+    CoffSegmentIterator, CoffSymbol, CoffSymbolIterator, CoffSymbolTable, SectionTable,
+    SymbolTable,
+};
+
+/// The common parts of `PeFile` and `CoffFile`.
+#[derive(Debug)]
+pub(crate) struct CoffCommon<'data, R: ReadRef<'data>> {
+    pub(crate) sections: SectionTable<'data>,
+    // TODO: ImageSymbolExBytes
+    pub(crate) symbols: SymbolTable<'data, R>,
+    pub(crate) image_base: u64,
+}
+
+/// A COFF object file.
+#[derive(Debug)]
+pub struct CoffFile<'data, R: ReadRef<'data> = &'data [u8]> {
+    pub(super) header: &'data pe::ImageFileHeader,
+    pub(super) common: CoffCommon<'data, R>,
+    pub(super) data: R,
+}
+
+impl<'data, R: ReadRef<'data>> CoffFile<'data, R> {
+    /// Parse the raw COFF file data.
+    pub fn parse(data: R) -> Result<Self> {
+        let mut offset = 0;
+        let header = pe::ImageFileHeader::parse(data, &mut offset)?;
+        let sections = header.sections(data, offset)?;
+        let symbols = header.symbols(data)?;
+
+        Ok(CoffFile {
+            header,
+            common: CoffCommon {
+                sections,
+                symbols,
+                image_base: 0,
+            },
+            data,
+        })
+    }
+}
+
+impl<'data, R: ReadRef<'data>> read::private::Sealed for CoffFile<'data, R> {}
+
+impl<'data, 'file, R> Object<'data, 'file> for CoffFile<'data, R>
+where
+    'data: 'file,
+    R: 'file + ReadRef<'data>,
+{
+    type Segment = CoffSegment<'data, 'file, R>;
+    type SegmentIterator = CoffSegmentIterator<'data, 'file, R>;
+    type Section = CoffSection<'data, 'file, R>;
+    type SectionIterator = CoffSectionIterator<'data, 'file, R>;
+    type Comdat = CoffComdat<'data, 'file, R>;
+    type ComdatIterator = CoffComdatIterator<'data, 'file, R>;
+    type Symbol = CoffSymbol<'data, 'file, R>;
+    type SymbolIterator = CoffSymbolIterator<'data, 'file, R>;
+    type SymbolTable = CoffSymbolTable<'data, 'file, R>;
+    type DynamicRelocationIterator = NoDynamicRelocationIterator;
+
+    fn architecture(&self) -> Architecture {
+        match self.header.machine.get(LE) {
+            pe::IMAGE_FILE_MACHINE_ARMNT => Architecture::Arm,
+            pe::IMAGE_FILE_MACHINE_ARM64 => Architecture::Aarch64,
+            pe::IMAGE_FILE_MACHINE_I386 => Architecture::I386,
+            pe::IMAGE_FILE_MACHINE_AMD64 => Architecture::X86_64,
+            _ => Architecture::Unknown,
+        }
+    }
+
+    #[inline]
+    fn is_little_endian(&self) -> bool {
+        true
+    }
+
+    #[inline]
+    fn is_64(&self) -> bool {
+        // Windows COFF is always 32-bit, even for 64-bit architectures. This could be confusing.
+        false
+    }
+
+    fn kind(&self) -> ObjectKind {
+        ObjectKind::Relocatable
+    }
+
+    fn segments(&'file self) -> CoffSegmentIterator<'data, 'file, R> {
+        CoffSegmentIterator {
+            file: self,
+            iter: self.common.sections.iter(),
+        }
+    }
+
+    fn section_by_name_bytes(
+        &'file self,
+        section_name: &[u8],
+    ) -> Option<CoffSection<'data, 'file, R>> {
+        self.sections()
+            .find(|section| section.name_bytes() == Ok(section_name))
+    }
+
+    fn section_by_index(&'file self, index: SectionIndex) -> Result<CoffSection<'data, 'file, R>> {
+        let section = self.common.sections.section(index.0)?;
+        Ok(CoffSection {
+            file: self,
+            index,
+            section,
+        })
+    }
+
+    fn sections(&'file self) -> CoffSectionIterator<'data, 'file, R> {
+        CoffSectionIterator {
+            file: self,
+            iter: self.common.sections.iter().enumerate(),
+        }
+    }
+
+    fn comdats(&'file self) -> CoffComdatIterator<'data, 'file, R> {
+        CoffComdatIterator {
+            file: self,
+            index: 0,
+        }
+    }
+
+    fn symbol_by_index(&'file self, index: SymbolIndex) -> Result<CoffSymbol<'data, 'file, R>> {
+        let symbol = self.common.symbols.symbol(index.0)?;
+        Ok(CoffSymbol {
+            file: &self.common,
+            index,
+            symbol,
+        })
+    }
+
+    fn symbols(&'file self) -> CoffSymbolIterator<'data, 'file, R> {
+        CoffSymbolIterator {
+            file: &self.common,
+            index: 0,
+        }
+    }
+
+    #[inline]
+    fn symbol_table(&'file self) -> Option<CoffSymbolTable<'data, 'file, R>> {
+        Some(CoffSymbolTable { file: &self.common })
+    }
+
+    fn dynamic_symbols(&'file self) -> CoffSymbolIterator<'data, 'file, R> {
+        CoffSymbolIterator {
+            file: &self.common,
+            // Hack: don't return any.
+            index: self.common.symbols.len(),
+        }
+    }
+
+    #[inline]
+    fn dynamic_symbol_table(&'file self) -> Option<CoffSymbolTable<'data, 'file, R>> {
+        None
+    }
+
+    #[inline]
+    fn dynamic_relocations(&'file self) -> Option<NoDynamicRelocationIterator> {
+        None
+    }
+
+    #[inline]
+    fn imports(&self) -> Result<Vec<Import<'data>>> {
+        // TODO: this could return undefined symbols, but not needed yet.
+        Ok(Vec::new())
+    }
+
+    #[inline]
+    fn exports(&self) -> Result<Vec<Export<'data>>> {
+        // TODO: this could return global symbols, but not needed yet.
+        Ok(Vec::new())
+    }
+
+    fn has_debug_symbols(&self) -> bool {
+        self.section_by_name(".debug_info").is_some()
+    }
+
+    fn relative_address_base(&self) -> u64 {
+        0
+    }
+
+    #[inline]
+    fn entry(&self) -> u64 {
+        0
+    }
+
+    fn flags(&self) -> FileFlags {
+        FileFlags::Coff {
+            characteristics: self.header.characteristics.get(LE),
+        }
+    }
+}
+
+impl pe::ImageFileHeader {
+    /// Read the file header.
+    ///
+    /// `data` must be the entire file data.
+    /// `offset` must be the file header offset. It is updated to point after the optional header,
+    /// which is where the section headers are located.
+    pub fn parse<'data, R: ReadRef<'data>>(data: R, offset: &mut u64) -> read::Result<&'data Self> {
+        let header = data
+            .read::<pe::ImageFileHeader>(offset)
+            .read_error("Invalid COFF file header size or alignment")?;
+
+        // Skip over the optional header.
+        *offset = offset
+            .checked_add(header.size_of_optional_header.get(LE).into())
+            .read_error("Invalid COFF optional header size")?;
+
+        // TODO: maybe validate that the machine is known?
+        Ok(header)
+    }
+
+    /// Read the section table.
+    ///
+    /// `data` must be the entire file data.
+    /// `offset` must be after the optional file header.
+    #[inline]
+    pub fn sections<'data, R: ReadRef<'data>>(
+        &self,
+        data: R,
+        offset: u64,
+    ) -> read::Result<SectionTable<'data>> {
+        SectionTable::parse(self, data, offset)
+    }
+
+    /// Read the symbol table and string table.
+    ///
+    /// `data` must be the entire file data.
+    #[inline]
+    pub fn symbols<'data, R: ReadRef<'data>>(
+        &self,
+        data: R,
+    ) -> read::Result<SymbolTable<'data, R>> {
+        SymbolTable::parse(self, data)
+    }
+}
diff --git a/third_party/rust/object/src/read/coff/mod.rs b/third_party/rust/object/src/read/coff/mod.rs
new file mode 100644
index 0000000000..d5b3caf32a
--- /dev/null
+++ b/third_party/rust/object/src/read/coff/mod.rs
@@ -0,0 +1,18 @@
+//! Support for reading Windows COFF files.
+//!
+//! Provides `CoffFile` and related types which implement the `Object` trait.
+
+mod file;
+pub use file::*;
+
+mod section;
+pub use section::*;
+
+mod symbol;
+pub use symbol::*;
+
+mod relocation;
+pub use relocation::*;
+
+mod comdat;
+pub use comdat::*;
diff --git a/third_party/rust/object/src/read/coff/relocation.rs b/third_party/rust/object/src/read/coff/relocation.rs
new file mode 100644
index 0000000000..9a1fcb6180
--- /dev/null
+++ b/third_party/rust/object/src/read/coff/relocation.rs
@@ -0,0 +1,91 @@
+use alloc::fmt;
+use core::slice;
+
+use crate::endian::LittleEndian as LE;
+use crate::pe;
+use crate::read::{
+    ReadRef, Relocation, RelocationEncoding, RelocationKind, RelocationTarget, SymbolIndex,
+};
+
+use super::CoffFile;
+
+/// An iterator over the relocations in a `CoffSection`.
+pub struct CoffRelocationIterator<'data, 'file, R: ReadRef<'data> = &'data [u8]> {
+    pub(super) file: &'file CoffFile<'data, R>,
+    pub(super) iter: slice::Iter<'data, pe::ImageRelocation>,
+}
+
+impl<'data, 'file, R: ReadRef<'data>> Iterator for CoffRelocationIterator<'data, 'file, R> {
+    type Item = (u64, Relocation);
+
+    fn next(&mut self) -> Option<Self::Item> {
+        self.iter.next().map(|relocation| {
+            let (kind, size, addend) = match self.file.header.machine.get(LE) {
+                pe::IMAGE_FILE_MACHINE_ARMNT => match relocation.typ.get(LE) {
+                    pe::IMAGE_REL_ARM_ADDR32 => (RelocationKind::Absolute, 32, 0),
+                    pe::IMAGE_REL_ARM_ADDR32NB => (RelocationKind::ImageOffset, 32, 0),
+                    pe::IMAGE_REL_ARM_REL32 => (RelocationKind::Relative, 32, -4),
+                    pe::IMAGE_REL_ARM_SECTION => (RelocationKind::SectionIndex, 16, 0),
+                    pe::IMAGE_REL_ARM_SECREL => (RelocationKind::SectionOffset, 32, 0),
+                    typ => (RelocationKind::Coff(typ), 0, 0),
+                },
+                pe::IMAGE_FILE_MACHINE_ARM64 => match relocation.typ.get(LE) {
+                    pe::IMAGE_REL_ARM64_ADDR32 => (RelocationKind::Absolute, 32, 0),
+                    pe::IMAGE_REL_ARM64_ADDR32NB => (RelocationKind::ImageOffset, 32, 0),
+                    pe::IMAGE_REL_ARM64_SECREL => (RelocationKind::SectionOffset, 32, 0),
+                    pe::IMAGE_REL_ARM64_SECTION => (RelocationKind::SectionIndex, 16, 0),
+                    pe::IMAGE_REL_ARM64_ADDR64 => (RelocationKind::Absolute, 64, 0),
+                    pe::IMAGE_REL_ARM64_REL32 => (RelocationKind::Relative, 32, -4),
+                    typ => (RelocationKind::Coff(typ), 0, 0),
+                },
+                pe::IMAGE_FILE_MACHINE_I386 => match relocation.typ.get(LE) {
+                    pe::IMAGE_REL_I386_DIR16 => (RelocationKind::Absolute, 16, 0),
+                    pe::IMAGE_REL_I386_REL16 => (RelocationKind::Relative, 16, 0),
+                    pe::IMAGE_REL_I386_DIR32 => (RelocationKind::Absolute, 32, 0),
+                    pe::IMAGE_REL_I386_DIR32NB => (RelocationKind::ImageOffset, 32, 0),
+                    pe::IMAGE_REL_I386_SECTION => (RelocationKind::SectionIndex, 16, 0),
+                    pe::IMAGE_REL_I386_SECREL => (RelocationKind::SectionOffset, 32, 0),
+                    pe::IMAGE_REL_I386_SECREL7 => (RelocationKind::SectionOffset, 7, 0),
+                    pe::IMAGE_REL_I386_REL32 => (RelocationKind::Relative, 32, -4),
+                    typ => (RelocationKind::Coff(typ), 0, 0),
+                },
+                pe::IMAGE_FILE_MACHINE_AMD64 => match relocation.typ.get(LE) {
+                    pe::IMAGE_REL_AMD64_ADDR64 => (RelocationKind::Absolute, 64, 0),
+                    pe::IMAGE_REL_AMD64_ADDR32 => (RelocationKind::Absolute, 32, 0),
+                    pe::IMAGE_REL_AMD64_ADDR32NB => (RelocationKind::ImageOffset, 32, 0),
+                    pe::IMAGE_REL_AMD64_REL32 => (RelocationKind::Relative, 32, -4),
+                    pe::IMAGE_REL_AMD64_REL32_1 => (RelocationKind::Relative, 32, -5),
+                    pe::IMAGE_REL_AMD64_REL32_2 => (RelocationKind::Relative, 32, -6),
+                    pe::IMAGE_REL_AMD64_REL32_3 => (RelocationKind::Relative, 32, -7),
+                    pe::IMAGE_REL_AMD64_REL32_4 => (RelocationKind::Relative, 32, -8),
+                    pe::IMAGE_REL_AMD64_REL32_5 => (RelocationKind::Relative, 32, -9),
+                    pe::IMAGE_REL_AMD64_SECTION => (RelocationKind::SectionIndex, 16, 0),
+                    pe::IMAGE_REL_AMD64_SECREL => (RelocationKind::SectionOffset, 32, 0),
+                    pe::IMAGE_REL_AMD64_SECREL7 => (RelocationKind::SectionOffset, 7, 0),
+                    typ => (RelocationKind::Coff(typ), 0, 0),
+                },
+                _ => (RelocationKind::Coff(relocation.typ.get(LE)), 0, 0),
+            };
+            let target = RelocationTarget::Symbol(SymbolIndex(
+                relocation.symbol_table_index.get(LE) as usize,
+            ));
+            (
+                u64::from(relocation.virtual_address.get(LE)),
+                Relocation {
+                    kind,
+                    encoding: RelocationEncoding::Generic,
+                    size,
+                    target,
+                    addend,
+                    implicit_addend: true,
+                },
+            )
+        })
+    }
+}
+
+impl<'data, 'file, R: ReadRef<'data>> fmt::Debug for CoffRelocationIterator<'data, 'file, R> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("CoffRelocationIterator").finish()
+    }
+}
diff --git a/third_party/rust/object/src/read/coff/section.rs b/third_party/rust/object/src/read/coff/section.rs
new file mode 100644
index 0000000000..731e37ca8b
--- /dev/null
+++ b/third_party/rust/object/src/read/coff/section.rs
@@ -0,0 +1,524 @@
+use core::convert::TryFrom;
+use core::{iter, result, slice, str};
+
+use crate::endian::LittleEndian as LE;
+use crate::pe;
+use crate::read::util::StringTable;
+use crate::read::{
+    self, CompressedData, CompressedFileRange, Error, ObjectSection, ObjectSegment, ReadError,
+    ReadRef, Result, SectionFlags, SectionIndex, SectionKind, SegmentFlags,
+};
+
+use super::{CoffFile, CoffRelocationIterator};
+
+/// The table of section headers in a COFF or PE file.
+#[derive(Debug, Default, Clone, Copy)]
+pub struct SectionTable<'data> {
+    sections: &'data [pe::ImageSectionHeader],
+}
+
+impl<'data> SectionTable<'data> {
+    /// Parse the section table.
+    ///
+    /// `data` must be the entire file data.
+    /// `offset` must be after the optional file header.
+    pub fn parse<R: ReadRef<'data>>(
+        header: &pe::ImageFileHeader,
+        data: R,
+        offset: u64,
+    ) -> Result<Self> {
+        let sections = data
+            .read_slice_at(offset, header.number_of_sections.get(LE).into())
+            .read_error("Invalid COFF/PE section headers")?;
+        Ok(SectionTable { sections })
+    }
+
+    /// Iterate over the section headers.
+    ///
+    /// Warning: sections indices start at 1.
+    #[inline]
+    pub fn iter(&self) -> slice::Iter<'data, pe::ImageSectionHeader> {
+        self.sections.iter()
+    }
+
+    /// Return true if the section table is empty.
+    #[inline]
+    pub fn is_empty(&self) -> bool {
+        self.sections.is_empty()
+    }
+
+    /// The number of section headers.
+    #[inline]
+    pub fn len(&self) -> usize {
+        self.sections.len()
+    }
+
+    /// Return the section header at the given index.
+    ///
+    /// The index is 1-based.
+    pub fn section(&self, index: usize) -> read::Result<&'data pe::ImageSectionHeader> {
+        self.sections
+            .get(index.wrapping_sub(1))
+            .read_error("Invalid COFF/PE section index")
+    }
+
+    /// Return the section header with the given name.
+    ///
+    /// The returned index is 1-based.
+    ///
+    /// Ignores sections with invalid names.
+    pub fn section_by_name<R: ReadRef<'data>>(
+        &self,
+        strings: StringTable<'data, R>,
+        name: &[u8],
+    ) -> Option<(usize, &'data pe::ImageSectionHeader)> {
+        self.sections
+            .iter()
+            .enumerate()
+            .find(|(_, section)| section.name(strings) == Ok(name))
+            .map(|(index, section)| (index + 1, section))
+    }
+
+    /// Compute the maximum file offset used by sections.
+    ///
+    /// This will usually match the end of file, unless the PE file has a
+    /// [data overlay](https://security.stackexchange.com/questions/77336/how-is-the-file-overlay-read-by-an-exe-virus)
+    pub fn max_section_file_offset(&self) -> u64 {
+        let mut max = 0;
+        for section in self.iter() {
+            match (section.pointer_to_raw_data.get(LE) as u64)
+                .checked_add(section.size_of_raw_data.get(LE) as u64)
+            {
+                None => {
+                    // This cannot happen, we're suming two u32 into a u64
+                    continue;
+                }
+                Some(end_of_section) => {
+                    if end_of_section > max {
+                        max = end_of_section;
+                    }
+                }
+            }
+        }
+        max
+    }
+}
+
+/// An iterator over the loadable sections of a `CoffFile`.
+#[derive(Debug)]
+pub struct CoffSegmentIterator<'data, 'file, R: ReadRef<'data> = &'data [u8]> {
+    pub(super) file: &'file CoffFile<'data, R>,
+    pub(super) iter: slice::Iter<'data, pe::ImageSectionHeader>,
+}
+
+impl<'data, 'file, R: ReadRef<'data>> Iterator for CoffSegmentIterator<'data, 'file, R> {
+    type Item = CoffSegment<'data, 'file, R>;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        self.iter.next().map(|section| CoffSegment {
+            file: self.file,
+            section,
+        })
+    }
+}
+
+/// A loadable section of a `CoffFile`.
+#[derive(Debug)]
+pub struct CoffSegment<'data, 'file, R: ReadRef<'data> = &'data [u8]> {
+    pub(super) file: &'file CoffFile<'data, R>,
+    pub(super) section: &'data pe::ImageSectionHeader,
+}
+
+impl<'data, 'file, R: ReadRef<'data>> CoffSegment<'data, 'file, R> {
+    fn bytes(&self) -> Result<&'data [u8]> {
+        self.section
+            .coff_data(self.file.data)
+            .read_error("Invalid COFF section offset or size")
+    }
+}
+
+impl<'data, 'file, R: ReadRef<'data>> read::private::Sealed for CoffSegment<'data, 'file, R> {}
+
+impl<'data, 'file, R: ReadRef<'data>> ObjectSegment<'data> for CoffSegment<'data, 'file, R> {
+    #[inline]
+    fn address(&self) -> u64 {
+        u64::from(self.section.virtual_address.get(LE))
+    }
+
+    #[inline]
+    fn size(&self) -> u64 {
+        u64::from(self.section.virtual_size.get(LE))
+    }
+
+    #[inline]
+    fn align(&self) -> u64 {
+        self.section.coff_alignment()
+    }
+
+    #[inline]
+    fn file_range(&self) -> (u64, u64) {
+        let (offset, size) = self.section.coff_file_range().unwrap_or((0, 0));
+        (u64::from(offset), u64::from(size))
+    }
+
+    fn data(&self) -> Result<&'data [u8]> {
+        self.bytes()
+    }
+
+    fn data_range(&self, address: u64, size: u64) -> Result<Option<&'data [u8]>> {
+        Ok(read::util::data_range(
+            self.bytes()?,
+            self.address(),
+            address,
+            size,
+        ))
+    }
+
+    #[inline]
+    fn name_bytes(&self) -> Result<Option<&[u8]>> {
+        self.section
+            .name(self.file.common.symbols.strings())
+            .map(Some)
+    }
+
+    #[inline]
+    fn name(&self) -> Result<Option<&str>> {
+        let name = self.section.name(self.file.common.symbols.strings())?;
+        str::from_utf8(name)
+            .ok()
+            .read_error("Non UTF-8 COFF section name")
+            .map(Some)
+    }
+
+    #[inline]
+    fn flags(&self) -> SegmentFlags {
+        let characteristics = self.section.characteristics.get(LE);
+        SegmentFlags::Coff { characteristics }
+    }
+}
+
+/// An iterator over the sections of a `CoffFile`.
+#[derive(Debug)]
+pub struct CoffSectionIterator<'data, 'file, R: ReadRef<'data> = &'data [u8]> {
+    pub(super) file: &'file CoffFile<'data, R>,
+    pub(super) iter: iter::Enumerate<slice::Iter<'data, pe::ImageSectionHeader>>,
+}
+
+impl<'data, 'file, R: ReadRef<'data>> Iterator for CoffSectionIterator<'data, 'file, R> {
+    type Item = CoffSection<'data, 'file, R>;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        self.iter.next().map(|(index, section)| CoffSection {
+            file: self.file,
+            index: SectionIndex(index + 1),
+            section,
+        })
+    }
+}
+
+/// A section of a `CoffFile`.
+#[derive(Debug)]
+pub struct CoffSection<'data, 'file, R: ReadRef<'data> = &'data [u8]> {
+    pub(super) file: &'file CoffFile<'data, R>,
+    pub(super) index: SectionIndex,
+    pub(super) section: &'data pe::ImageSectionHeader,
+}
+
+impl<'data, 'file, R: ReadRef<'data>> CoffSection<'data, 'file, R> {
+    fn bytes(&self) -> Result<&'data [u8]> {
+        self.section
+            .coff_data(self.file.data)
+            .read_error("Invalid COFF section offset or size")
+    }
+}
+
+impl<'data, 'file, R: ReadRef<'data>> read::private::Sealed for CoffSection<'data, 'file, R> {}
+
+impl<'data, 'file, R: ReadRef<'data>> ObjectSection<'data> for CoffSection<'data, 'file, R> {
+    type RelocationIterator = CoffRelocationIterator<'data, 'file, R>;
+
+    #[inline]
+    fn index(&self) -> SectionIndex {
+        self.index
+    }
+
+    #[inline]
+    fn address(&self) -> u64 {
+        u64::from(self.section.virtual_address.get(LE))
+    }
+
+    #[inline]
+    fn size(&self) -> u64 {
+        // TODO: This may need to be the length from the auxiliary symbol for this section.
+        u64::from(self.section.size_of_raw_data.get(LE))
+    }
+
+    #[inline]
+    fn align(&self) -> u64 {
+        self.section.coff_alignment()
+    }
+
+    #[inline]
+    fn file_range(&self) -> Option<(u64, u64)> {
+        let (offset, size) = self.section.coff_file_range()?;
+        Some((u64::from(offset), u64::from(size)))
+    }
+
+    fn data(&self) -> Result<&'data [u8]> {
+        self.bytes()
+    }
+
+    fn data_range(&self, address: u64, size: u64) -> Result<Option<&'data [u8]>> {
+        Ok(read::util::data_range(
+            self.bytes()?,
+            self.address(),
+            address,
+            size,
+        ))
+    }
+
+    #[inline]
+    fn compressed_file_range(&self) -> Result<CompressedFileRange> {
+        Ok(CompressedFileRange::none(self.file_range()))
+    }
+
+    #[inline]
+    fn compressed_data(&self) -> Result<CompressedData<'data>> {
+        self.data().map(CompressedData::none)
+    }
+
+    #[inline]
+    fn name_bytes(&self) -> Result<&[u8]> {
+        self.section.name(self.file.common.symbols.strings())
+    }
+
+    #[inline]
+    fn name(&self) -> Result<&str> {
+        let name = self.name_bytes()?;
+        str::from_utf8(name)
+            .ok()
+            .read_error("Non UTF-8 COFF section name")
+    }
+
+    #[inline]
+    fn segment_name_bytes(&self) -> Result<Option<&[u8]>> {
+        Ok(None)
+    }
+
+    #[inline]
+    fn segment_name(&self) -> Result<Option<&str>> {
+        Ok(None)
+    }
+
+    #[inline]
+    fn kind(&self) -> SectionKind {
+        self.section.kind()
+    }
+
+    fn relocations(&self) -> CoffRelocationIterator<'data, 'file, R> {
+        let relocations = self.section.coff_relocations(self.file.data).unwrap_or(&[]);
+        CoffRelocationIterator {
+            file: self.file,
+            iter: relocations.iter(),
+        }
+    }
+
+    fn flags(&self) -> SectionFlags {
+        SectionFlags::Coff {
+            characteristics: self.section.characteristics.get(LE),
+        }
+    }
+}
+
+impl pe::ImageSectionHeader {
+    pub(crate) fn kind(&self) -> SectionKind {
+        let characteristics = self.characteristics.get(LE);
+        if characteristics & (pe::IMAGE_SCN_CNT_CODE | pe::IMAGE_SCN_MEM_EXECUTE) != 0 {
+            SectionKind::Text
+        } else if characteristics & pe::IMAGE_SCN_CNT_INITIALIZED_DATA != 0 {
+            if characteristics & pe::IMAGE_SCN_MEM_DISCARDABLE != 0 {
+                SectionKind::Other
+            } else if characteristics & pe::IMAGE_SCN_MEM_WRITE != 0 {
+                SectionKind::Data
+            } else {
+                SectionKind::ReadOnlyData
+            }
+        } else if characteristics & pe::IMAGE_SCN_CNT_UNINITIALIZED_DATA != 0 {
+            SectionKind::UninitializedData
+        } else if characteristics & pe::IMAGE_SCN_LNK_INFO != 0 {
+            SectionKind::Linker
+        } else {
+            SectionKind::Unknown
+        }
+    }
+}
+
+impl pe::ImageSectionHeader {
+    /// Return the string table offset of the section name.
+    ///
+    /// Returns `Ok(None)` if the name doesn't use the string table
+    /// and can be obtained with `raw_name` instead.
+    pub fn name_offset(&self) -> Result<Option<u32>> {
+        let bytes = &self.name;
+        if bytes[0] != b'/' {
+            return Ok(None);
+        }
+
+        if bytes[1] == b'/' {
+            let mut offset = 0;
+            for byte in bytes[2..].iter() {
+                let digit = match byte {
+                    b'A'..=b'Z' => byte - b'A',
+                    b'a'..=b'z' => byte - b'a' + 26,
+                    b'0'..=b'9' => byte - b'0' + 52,
+                    b'+' => 62,
+                    b'/' => 63,
+                    _ => return Err(Error("Invalid COFF section name base-64 offset")),
+                };
+                offset = offset * 64 + digit as u64;
+            }
+            u32::try_from(offset)
+                .ok()
+                .read_error("Invalid COFF section name base-64 offset")
+                .map(Some)
+        } else {
+            let mut offset = 0;
+            for byte in bytes[1..].iter() {
+                let digit = match byte {
+                    b'0'..=b'9' => byte - b'0',
+                    0 => break,
+                    _ => return Err(Error("Invalid COFF section name base-10 offset")),
+                };
+                offset = offset * 10 + digit as u32;
+            }
+            Ok(Some(offset))
+        }
+    }
+
+    /// Return the section name.
+    ///
+    /// This handles decoding names that are offsets into the symbol string table.
+    pub fn name<'data, R: ReadRef<'data>>(
+        &'data self,
+        strings: StringTable<'data, R>,
+    ) -> Result<&'data [u8]> {
+        if let Some(offset) = self.name_offset()? {
+            strings
+                .get(offset)
+                .read_error("Invalid COFF section name offset")
+        } else {
+            Ok(self.raw_name())
+        }
+    }
+
+    /// Return the raw section name.
+    pub fn raw_name(&self) -> &[u8] {
+        let bytes = &self.name;
+        match memchr::memchr(b'\0', bytes) {
+            Some(end) => &bytes[..end],
+            None => &bytes[..],
+        }
+    }
+
+    /// Return the offset and size of the section in a COFF file.
+    ///
+    /// Returns `None` for sections that have no data in the file.
+    pub fn coff_file_range(&self) -> Option<(u32, u32)> {
+        if self.characteristics.get(LE) & pe::IMAGE_SCN_CNT_UNINITIALIZED_DATA != 0 {
+            None
+        } else {
+            let offset = self.pointer_to_raw_data.get(LE);
+            // Note: virtual size is not used for COFF.
+            let size = self.size_of_raw_data.get(LE);
+            Some((offset, size))
+        }
+    }
+
+    /// Return the section data in a COFF file.
+    ///
+    /// Returns `Ok(&[])` if the section has no data.
+    /// Returns `Err` for invalid values.
+    pub fn coff_data<'data, R: ReadRef<'data>>(&self, data: R) -> result::Result<&'data [u8], ()> {
+        if let Some((offset, size)) = self.coff_file_range() {
+            data.read_bytes_at(offset.into(), size.into())
+        } else {
+            Ok(&[])
+        }
+    }
+
+    /// Return the section alignment in bytes.
+    ///
+    /// This is only valid for sections in a COFF file.
+    pub fn coff_alignment(&self) -> u64 {
+        match self.characteristics.get(LE) & pe::IMAGE_SCN_ALIGN_MASK {
+            pe::IMAGE_SCN_ALIGN_1BYTES => 1,
+            pe::IMAGE_SCN_ALIGN_2BYTES => 2,
+            pe::IMAGE_SCN_ALIGN_4BYTES => 4,
+            pe::IMAGE_SCN_ALIGN_8BYTES => 8,
+            pe::IMAGE_SCN_ALIGN_16BYTES => 16,
+            pe::IMAGE_SCN_ALIGN_32BYTES => 32,
+            pe::IMAGE_SCN_ALIGN_64BYTES => 64,
+            pe::IMAGE_SCN_ALIGN_128BYTES => 128,
+            pe::IMAGE_SCN_ALIGN_256BYTES => 256,
+            pe::IMAGE_SCN_ALIGN_512BYTES => 512,
+            pe::IMAGE_SCN_ALIGN_1024BYTES => 1024,
+            pe::IMAGE_SCN_ALIGN_2048BYTES => 2048,
+            pe::IMAGE_SCN_ALIGN_4096BYTES => 4096,
+            pe::IMAGE_SCN_ALIGN_8192BYTES => 8192,
+            _ => 16,
+        }
+    }
+
+    /// Read the relocations in a COFF file.
+    ///
+    /// `data` must be the entire file data.
+    pub fn coff_relocations<'data, R: ReadRef<'data>>(
+        &self,
+        data: R,
+    ) -> read::Result<&'data [pe::ImageRelocation]> {
+        let mut pointer = self.pointer_to_relocations.get(LE).into();
+        let mut number: usize = self.number_of_relocations.get(LE).into();
+        if number == core::u16::MAX.into()
+            && self.characteristics.get(LE) & pe::IMAGE_SCN_LNK_NRELOC_OVFL != 0
+        {
+            // Extended relocations. Read first relocation (which contains extended count) & adjust
+            // relocations pointer.
+            let extended_relocation_info = data
+                .read_at::<pe::ImageRelocation>(pointer)
+                .read_error("Invalid COFF relocation offset or number")?;
+            number = extended_relocation_info.virtual_address.get(LE) as usize;
+            if number == 0 {
+                return Err(Error("Invalid COFF relocation number"));
+            }
+            pointer += core::mem::size_of::<pe::ImageRelocation>() as u64;
+            // Extended relocation info does not contribute to the count of sections.
+            number -= 1;
+        }
+        data.read_slice_at(pointer, number)
+            .read_error("Invalid COFF relocation offset or number")
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn name_offset() {
+        let mut section = pe::ImageSectionHeader::default();
+        section.name = *b"xxxxxxxx";
+        assert_eq!(section.name_offset(), Ok(None));
+        section.name = *b"/0\0\0\0\0\0\0";
+        assert_eq!(section.name_offset(), Ok(Some(0)));
+        section.name = *b"/9999999";
+        assert_eq!(section.name_offset(), Ok(Some(999_9999)));
+        section.name = *b"//AAAAAA";
+        assert_eq!(section.name_offset(), Ok(Some(0)));
+        section.name = *b"//D/////";
+        assert_eq!(section.name_offset(), Ok(Some(0xffff_ffff)));
+        section.name = *b"//EAAAAA";
+        assert!(section.name_offset().is_err());
+        section.name = *b"////////";
+        assert!(section.name_offset().is_err());
+    }
+}
diff --git a/third_party/rust/object/src/read/coff/symbol.rs b/third_party/rust/object/src/read/coff/symbol.rs
new file mode 100644
index 0000000000..217e38fcaa
--- /dev/null
+++ b/third_party/rust/object/src/read/coff/symbol.rs
@@ -0,0 +1,526 @@
+use alloc::fmt;
+use alloc::vec::Vec;
+use core::convert::TryInto;
+use core::str;
+
+use super::{CoffCommon, SectionTable};
+use crate::endian::{LittleEndian as LE, U32Bytes};
+use crate::pe;
+use crate::pod::{bytes_of_slice, Pod};
+use crate::read::util::StringTable;
+use crate::read::{
+    self, Bytes, ObjectSymbol, ObjectSymbolTable, ReadError, ReadRef, Result, SectionIndex,
+    SymbolFlags, SymbolIndex, SymbolKind, SymbolMap, SymbolMapEntry, SymbolScope, SymbolSection,
+};
+
+/// A table of symbol entries in a COFF or PE file.
+///
+/// Also includes the string table used for the symbol names.
+#[derive(Debug)]
+pub struct SymbolTable<'data, R = &'data [u8]>
+where
+    R: ReadRef<'data>,
+{
+    symbols: &'data [pe::ImageSymbolBytes],
+    strings: StringTable<'data, R>,
+}
+
+impl<'data, R: ReadRef<'data>> Default for SymbolTable<'data, R> {
+    fn default() -> Self {
+        Self {
+            symbols: &[],
+            strings: StringTable::default(),
+        }
+    }
+}
+
+impl<'data, R: ReadRef<'data>> SymbolTable<'data, R> {
+    /// Read the symbol table.
+    pub fn parse(header: &pe::ImageFileHeader, data: R) -> Result<Self> {
+        // The symbol table may not be present.
+        let mut offset = header.pointer_to_symbol_table.get(LE).into();
+        let (symbols, strings) = if offset != 0 {
+            let symbols = data
+                .read_slice(&mut offset, header.number_of_symbols.get(LE) as usize)
+                .read_error("Invalid COFF symbol table offset or size")?;
+
+            // Note: don't update data when reading length; the length includes itself.
+            let length = data
+                .read_at::<U32Bytes<_>>(offset)
+                .read_error("Missing COFF string table")?
+                .get(LE);
+            let str_end = offset
+                .checked_add(length as u64)
+                .read_error("Invalid COFF string table length")?;
+            let strings = StringTable::new(data, offset, str_end);
+
+            (symbols, strings)
+        } else {
+            (&[][..], StringTable::default())
+        };
+
+        Ok(SymbolTable { symbols, strings })
+    }
+
+    /// Return the string table used for the symbol names.
+    #[inline]
+    pub fn strings(&self) -> StringTable<'data, R> {
+        self.strings
+    }
+
+    /// Return true if the symbol table is empty.
+    #[inline]
+    pub fn is_empty(&self) -> bool {
+        self.symbols.is_empty()
+    }
+
+    /// The number of symbol table entries.
+    ///
+    /// This includes auxiliary symbol table entries.
+    #[inline]
+    pub fn len(&self) -> usize {
+        self.symbols.len()
+    }
+
+    /// Iterate over the symbols.
+    #[inline]
+    pub fn iter<'table>(&'table self) -> SymbolIterator<'data, 'table, R> {
+        SymbolIterator {
+            symbols: self,
+            index: 0,
+        }
+    }
+
+    /// Return the symbol table entry at the given index.
+    #[inline]
+    pub fn symbol(&self, index: usize) -> Result<&'data pe::ImageSymbol> {
+        self.get::<pe::ImageSymbol>(index, 0)
+    }
+
+    /// Return the auxiliary function symbol for the symbol table entry at the given index.
+    ///
+    /// Note that the index is of the symbol, not the first auxiliary record.
+    #[inline]
+    pub fn aux_function(&self, index: usize) -> Result<&'data pe::ImageAuxSymbolFunction> {
+        self.get::<pe::ImageAuxSymbolFunction>(index, 1)
+    }
+
+    /// Return the auxiliary section symbol for the symbol table entry at the given index.
+    ///
+    /// Note that the index is of the symbol, not the first auxiliary record.
+    #[inline]
+    pub fn aux_section(&self, index: usize) -> Result<&'data pe::ImageAuxSymbolSection> {
+        self.get::<pe::ImageAuxSymbolSection>(index, 1)
+    }
+
+    /// Return the auxiliary file name for the symbol table entry at the given index.
+    ///
+    /// Note that the index is of the symbol, not the first auxiliary record.
+    pub fn aux_file_name(&self, index: usize, aux_count: u8) -> Result<&'data [u8]> {
+        let entries = index
+            .checked_add(1)
+            .and_then(|x| Some(x..x.checked_add(aux_count.into())?))
+            .and_then(|x| self.symbols.get(x))
+            .read_error("Invalid COFF symbol index")?;
+        let bytes = bytes_of_slice(entries);
+        // The name is padded with nulls.
+        Ok(match memchr::memchr(b'\0', bytes) {
+            Some(end) => &bytes[..end],
+            None => bytes,
+        })
+    }
+
+    /// Return the symbol table entry or auxiliary record at the given index and offset.
+    pub fn get<T: Pod>(&self, index: usize, offset: usize) -> Result<&'data T> {
+        let bytes = index
+            .checked_add(offset)
+            .and_then(|x| self.symbols.get(x))
+            .read_error("Invalid COFF symbol index")?;
+        Bytes(&bytes.0[..])
+            .read()
+            .read_error("Invalid COFF symbol data")
+    }
+
+    /// Construct a map from addresses to a user-defined map entry.
+    pub fn map<Entry: SymbolMapEntry, F: Fn(&'data pe::ImageSymbol) -> Option<Entry>>(
+        &self,
+        f: F,
+    ) -> SymbolMap<Entry> {
+        let mut symbols = Vec::with_capacity(self.symbols.len());
+        for (_, symbol) in self.iter() {
+            if !symbol.is_definition() {
+                continue;
+            }
+            if let Some(entry) = f(symbol) {
+                symbols.push(entry);
+            }
+        }
+        SymbolMap::new(symbols)
+    }
+}
+
+/// An iterator for symbol entries in a COFF or PE file.
+///
+/// Yields the index and symbol structure for each symbol.
+#[derive(Debug)]
+pub struct SymbolIterator<'data, 'table, R = &'data [u8]>
+where
+    R: ReadRef<'data>,
+{
+    symbols: &'table SymbolTable<'data, R>,
+    index: usize,
+}
+
+impl<'data, 'table, R: ReadRef<'data>> Iterator for SymbolIterator<'data, 'table, R> {
+    type Item = (usize, &'data pe::ImageSymbol);
+
+    fn next(&mut self) -> Option<Self::Item> {
+        let index = self.index;
+        let symbol = self.symbols.symbol(index).ok()?;
+        self.index += 1 + symbol.number_of_aux_symbols as usize;
+        Some((index, symbol))
+    }
+}
+
+impl pe::ImageSymbol {
+    /// Parse a COFF symbol name.
+    ///
+    /// `strings` must be the string table used for symbol names.
+    pub fn name<'data, R: ReadRef<'data>>(
+        &'data self,
+        strings: StringTable<'data, R>,
+    ) -> Result<&'data [u8]> {
+        if self.name[0] == 0 {
+            // If the name starts with 0 then the last 4 bytes are a string table offset.
+            let offset = u32::from_le_bytes(self.name[4..8].try_into().unwrap());
+            strings
+                .get(offset)
+                .read_error("Invalid COFF symbol name offset")
+        } else {
+            // The name is inline and padded with nulls.
+            Ok(match memchr::memchr(b'\0', &self.name) {
+                Some(end) => &self.name[..end],
+                None => &self.name[..],
+            })
+        }
+    }
+
+    /// Return the symbol address.
+    ///
+    /// This takes into account the image base and the section address.
+    pub fn address(&self, image_base: u64, sections: &SectionTable) -> Result<u64> {
+        let section_number = self.section_number.get(LE) as usize;
+        let section = sections.section(section_number)?;
+        let virtual_address = u64::from(section.virtual_address.get(LE));
+        let value = u64::from(self.value.get(LE));
+        Ok(image_base + virtual_address + value)
+    }
+
+    /// Return true if the symbol is a definition of a function or data object.
+    pub fn is_definition(&self) -> bool {
+        let section_number = self.section_number.get(LE);
+        if section_number == pe::IMAGE_SYM_UNDEFINED {
+            return false;
+        }
+        match self.storage_class {
+            pe::IMAGE_SYM_CLASS_STATIC => {
+                // Exclude section symbols.
+                !(self.value.get(LE) == 0 && self.number_of_aux_symbols > 0)
+            }
+            pe::IMAGE_SYM_CLASS_EXTERNAL | pe::IMAGE_SYM_CLASS_WEAK_EXTERNAL => true,
+            _ => false,
+        }
+    }
+
+    /// Return true if the symbol has an auxiliary file name.
+    pub fn has_aux_file_name(&self) -> bool {
+        self.number_of_aux_symbols > 0 && self.storage_class == pe::IMAGE_SYM_CLASS_FILE
+    }
+
+    /// Return true if the symbol has an auxiliary function symbol.
+    pub fn has_aux_function(&self) -> bool {
+        self.number_of_aux_symbols > 0 && self.derived_type() == pe::IMAGE_SYM_DTYPE_FUNCTION
+    }
+
+    /// Return true if the symbol has an auxiliary section symbol.
+    pub fn has_aux_section(&self) -> bool {
+        self.number_of_aux_symbols > 0
+            && self.storage_class == pe::IMAGE_SYM_CLASS_STATIC
+            && self.value.get(LE) == 0
+    }
+}
+
+/// A symbol table of a `CoffFile`.
+#[derive(Debug, Clone, Copy)]
+pub struct CoffSymbolTable<'data, 'file, R = &'data [u8]>
+where
+    R: ReadRef<'data>,
+{
+    pub(crate) file: &'file CoffCommon<'data, R>,
+}
+
+impl<'data, 'file, R: ReadRef<'data>> read::private::Sealed for CoffSymbolTable<'data, 'file, R> {}
+
+impl<'data, 'file, R: ReadRef<'data>> ObjectSymbolTable<'data>
+    for CoffSymbolTable<'data, 'file, R>
+{
+    type Symbol = CoffSymbol<'data, 'file, R>;
+    type SymbolIterator = CoffSymbolIterator<'data, 'file, R>;
+
+    fn symbols(&self) -> Self::SymbolIterator {
+        CoffSymbolIterator {
+            file: self.file,
+            index: 0,
+        }
+    }
+
+    fn symbol_by_index(&self, index: SymbolIndex) -> Result<Self::Symbol> {
+        let symbol = self.file.symbols.symbol(index.0)?;
+        Ok(CoffSymbol {
+            file: self.file,
+            index,
+            symbol,
+        })
+    }
+}
+
+/// An iterator over the symbols of a `CoffFile`.
+pub struct CoffSymbolIterator<'data, 'file, R = &'data [u8]>
+where
+    R: ReadRef<'data>,
+{
+    pub(crate) file: &'file CoffCommon<'data, R>,
+    pub(crate) index: usize,
+}
+
+impl<'data, 'file, R: ReadRef<'data>> fmt::Debug for CoffSymbolIterator<'data, 'file, R> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("CoffSymbolIterator").finish()
+    }
+}
+
+impl<'data, 'file, R: ReadRef<'data>> Iterator for CoffSymbolIterator<'data, 'file, R> {
+    type Item = CoffSymbol<'data, 'file, R>;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        let index = self.index;
+        let symbol = self.file.symbols.symbol(index).ok()?;
+        self.index += 1 + symbol.number_of_aux_symbols as usize;
+        Some(CoffSymbol {
+            file: self.file,
+            index: SymbolIndex(index),
+            symbol,
+        })
+    }
+}
+
+/// A symbol of a `CoffFile`.
+#[derive(Debug, Clone, Copy)]
+pub struct CoffSymbol<'data, 'file, R = &'data [u8]>
+where
+    R: ReadRef<'data>,
+{
+    pub(crate) file: &'file CoffCommon<'data, R>,
+    pub(crate) index: SymbolIndex,
+    pub(crate) symbol: &'data pe::ImageSymbol,
+}
+
+impl<'data, 'file, R: ReadRef<'data>> CoffSymbol<'data, 'file, R> {
+    #[inline]
+    /// Get the raw `ImageSymbol` struct.
+    pub fn raw_symbol(&self) -> &'data pe::ImageSymbol {
+        self.symbol
+    }
+}
+
+impl<'data, 'file, R: ReadRef<'data>> read::private::Sealed for CoffSymbol<'data, 'file, R> {}
+
+impl<'data, 'file, R: ReadRef<'data>> ObjectSymbol<'data> for CoffSymbol<'data, 'file, R> {
+    #[inline]
+    fn index(&self) -> SymbolIndex {
+        self.index
+    }
+
+    fn name_bytes(&self) -> read::Result<&'data [u8]> {
+        if self.symbol.has_aux_file_name() {
+            self.file
+                .symbols
+                .aux_file_name(self.index.0, self.symbol.number_of_aux_symbols)
+        } else {
+            self.symbol.name(self.file.symbols.strings())
+        }
+    }
+
+    fn name(&self) -> read::Result<&'data str> {
+        let name = self.name_bytes()?;
+        str::from_utf8(name)
+            .ok()
+            .read_error("Non UTF-8 COFF symbol name")
+    }
+
+    fn address(&self) -> u64 {
+        // Only return an address for storage classes that we know use an address.
+        match self.symbol.storage_class {
+            pe::IMAGE_SYM_CLASS_STATIC
+            | pe::IMAGE_SYM_CLASS_WEAK_EXTERNAL
+            | pe::IMAGE_SYM_CLASS_LABEL => {}
+            pe::IMAGE_SYM_CLASS_EXTERNAL => {
+                if self.symbol.section_number.get(LE) == pe::IMAGE_SYM_UNDEFINED {
+                    // Undefined or common data, neither of which have an address.
+                    return 0;
+                }
+            }
+            _ => return 0,
+        }
+        self.symbol
+            .address(self.file.image_base, &self.file.sections)
+            .unwrap_or(0)
+    }
+
+    fn size(&self) -> u64 {
+        match self.symbol.storage_class {
+            pe::IMAGE_SYM_CLASS_STATIC => {
+                // Section symbols may duplicate the size from the section table.
+                if self.symbol.has_aux_section() {
+                    if let Ok(aux) = self.file.symbols.aux_section(self.index.0) {
+                        u64::from(aux.length.get(LE))
+                    } else {
+                        0
+                    }
+                } else {
+                    0
+                }
+            }
+            pe::IMAGE_SYM_CLASS_EXTERNAL => {
+                if self.symbol.section_number.get(LE) == pe::IMAGE_SYM_UNDEFINED {
+                    // For undefined symbols, symbol.value is 0 and the size is 0.
+                    // For common data, symbol.value is the size.
+                    u64::from(self.symbol.value.get(LE))
+                } else if self.symbol.has_aux_function() {
+                    // Function symbols may have a size.
+                    if let Ok(aux) = self.file.symbols.aux_function(self.index.0) {
+                        u64::from(aux.total_size.get(LE))
+                    } else {
+                        0
+                    }
+                } else {
+                    0
+                }
+            }
+            // Most symbols don't have sizes.
+            _ => 0,
+        }
+    }
+
+    fn kind(&self) -> SymbolKind {
+        let derived_kind = if self.symbol.derived_type() == pe::IMAGE_SYM_DTYPE_FUNCTION {
+            SymbolKind::Text
+        } else {
+            SymbolKind::Data
+        };
+        match self.symbol.storage_class {
+            pe::IMAGE_SYM_CLASS_STATIC => {
+                if self.symbol.value.get(LE) == 0 && self.symbol.number_of_aux_symbols > 0 {
+                    SymbolKind::Section
+                } else {
+                    derived_kind
+                }
+            }
+            pe::IMAGE_SYM_CLASS_EXTERNAL | pe::IMAGE_SYM_CLASS_WEAK_EXTERNAL => derived_kind,
+            pe::IMAGE_SYM_CLASS_SECTION => SymbolKind::Section,
+            pe::IMAGE_SYM_CLASS_FILE => SymbolKind::File,
+            pe::IMAGE_SYM_CLASS_LABEL => SymbolKind::Label,
+            _ => SymbolKind::Unknown,
+        }
+    }
+
+    fn section(&self) -> SymbolSection {
+        match self.symbol.section_number.get(LE) {
+            pe::IMAGE_SYM_UNDEFINED => {
+                if self.symbol.storage_class == pe::IMAGE_SYM_CLASS_EXTERNAL
+                    && self.symbol.value.get(LE) == 0
+                {
+                    SymbolSection::Undefined
+                } else {
+                    SymbolSection::Common
+                }
+            }
+            pe::IMAGE_SYM_ABSOLUTE => SymbolSection::Absolute,
+            pe::IMAGE_SYM_DEBUG => {
+                if self.symbol.storage_class == pe::IMAGE_SYM_CLASS_FILE {
+                    SymbolSection::None
+                } else {
+                    SymbolSection::Unknown
+                }
+            }
+            index if index > 0 => SymbolSection::Section(SectionIndex(index.into())),
+            _ => SymbolSection::Unknown,
+        }
+    }
+
+    #[inline]
+    fn is_undefined(&self) -> bool {
+        self.symbol.storage_class == pe::IMAGE_SYM_CLASS_EXTERNAL
+            && self.symbol.section_number.get(LE) == pe::IMAGE_SYM_UNDEFINED
+            && self.symbol.value.get(LE) == 0
+    }
+
+    #[inline]
+    fn is_definition(&self) -> bool {
+        self.symbol.is_definition()
+    }
+
+    #[inline]
+    fn is_common(&self) -> bool {
+        self.symbol.storage_class == pe::IMAGE_SYM_CLASS_EXTERNAL
+            && self.symbol.section_number.get(LE) == pe::IMAGE_SYM_UNDEFINED
+            && self.symbol.value.get(LE) != 0
+    }
+
+    #[inline]
+    fn is_weak(&self) -> bool {
+        self.symbol.storage_class == pe::IMAGE_SYM_CLASS_WEAK_EXTERNAL
+    }
+
+    #[inline]
+    fn scope(&self) -> SymbolScope {
+        match self.symbol.storage_class {
+            pe::IMAGE_SYM_CLASS_EXTERNAL | pe::IMAGE_SYM_CLASS_WEAK_EXTERNAL => {
+                // TODO: determine if symbol is exported
+                SymbolScope::Linkage
+            }
+            _ => SymbolScope::Compilation,
+        }
+    }
+
+    #[inline]
+    fn is_global(&self) -> bool {
+        match self.symbol.storage_class {
+            pe::IMAGE_SYM_CLASS_EXTERNAL | pe::IMAGE_SYM_CLASS_WEAK_EXTERNAL => true,
+            _ => false,
+        }
+    }
+
+    #[inline]
+    fn is_local(&self) -> bool {
+        !self.is_global()
+    }
+
+    fn flags(&self) -> SymbolFlags<SectionIndex> {
+        if self.symbol.has_aux_section() {
+            if let Ok(aux) = self.file.symbols.aux_section(self.index.0) {
+                // TODO: use high_number for bigobj
+                let number = aux.number.get(LE) as usize;
+                return SymbolFlags::CoffSection {
+                    selection: aux.selection,
+                    associative_section: if number == 0 {
+                        None
+                    } else {
+                        Some(SectionIndex(number))
+                    },
+                };
+            }
+        }
+        SymbolFlags::None
+    }
+}
diff --git a/third_party/rust/object/src/read/elf/comdat.rs b/third_party/rust/object/src/read/elf/comdat.rs
new file mode 100644
index 0000000000..7cee85bb44
--- /dev/null
+++ b/third_party/rust/object/src/read/elf/comdat.rs
@@ -0,0 +1,162 @@
+use core::fmt::Debug;
+use core::{iter, slice, str};
+
+use crate::elf;
+use crate::endian::{Endianness, U32Bytes};
+use crate::read::{self, ComdatKind, ObjectComdat, ReadError, ReadRef, SectionIndex, SymbolIndex};
+
+use super::{ElfFile, FileHeader, SectionHeader, Sym};
+
+/// An iterator over the COMDAT section groups of an `ElfFile32`.
+pub type ElfComdatIterator32<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    ElfComdatIterator<'data, 'file, elf::FileHeader32<Endian>, R>;
+/// An iterator over the COMDAT section groups of an `ElfFile64`.
+pub type ElfComdatIterator64<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    ElfComdatIterator<'data, 'file, elf::FileHeader64<Endian>, R>;
+
+/// An iterator over the COMDAT section groups of an `ElfFile`.
+#[derive(Debug)]
+pub struct ElfComdatIterator<'data, 'file, Elf, R = &'data [u8]>
+where
+    'data: 'file,
+    Elf: FileHeader,
+    R: ReadRef<'data>,
+{
+    pub(super) file: &'file ElfFile<'data, Elf, R>,
+    pub(super) iter: iter::Enumerate<slice::Iter<'data, Elf::SectionHeader>>,
+}
+
+impl<'data, 'file, Elf, R> Iterator for ElfComdatIterator<'data, 'file, Elf, R>
+where
+    Elf: FileHeader,
+    R: ReadRef<'data>,
+{
+    type Item = ElfComdat<'data, 'file, Elf, R>;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        for (_index, section) in self.iter.by_ref() {
+            if let Some(comdat) = ElfComdat::parse(self.file, section) {
+                return Some(comdat);
+            }
+        }
+        None
+    }
+}
+
+/// A COMDAT section group of an `ElfFile32`.
+pub type ElfComdat32<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    ElfComdat<'data, 'file, elf::FileHeader32<Endian>, R>;
+/// A COMDAT section group of an `ElfFile64`.
+pub type ElfComdat64<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    ElfComdat<'data, 'file, elf::FileHeader64<Endian>, R>;
+
+/// A COMDAT section group of an `ElfFile`.
+#[derive(Debug)]
+pub struct ElfComdat<'data, 'file, Elf, R = &'data [u8]>
+where
+    Elf: FileHeader,
+    R: ReadRef<'data>,
+{
+    file: &'file ElfFile<'data, Elf, R>,
+    section: &'data Elf::SectionHeader,
+    sections: &'data [U32Bytes<Elf::Endian>],
+}
+
+impl<'data, 'file, Elf, R> ElfComdat<'data, 'file, Elf, R>
+where
+    Elf: FileHeader,
+    R: ReadRef<'data>,
+{
+    fn parse(
+        file: &'file ElfFile<'data, Elf, R>,
+        section: &'data Elf::SectionHeader,
+    ) -> Option<ElfComdat<'data, 'file, Elf, R>> {
+        let (flag, sections) = section.group(file.endian, file.data).ok()??;
+        if flag != elf::GRP_COMDAT {
+            return None;
+        }
+        Some(ElfComdat {
+            file,
+            section,
+            sections,
+        })
+    }
+}
+
+impl<'data, 'file, Elf, R> read::private::Sealed for ElfComdat<'data, 'file, Elf, R>
+where
+    Elf: FileHeader,
+    R: ReadRef<'data>,
+{
+}
+
+impl<'data, 'file, Elf, R> ObjectComdat<'data> for ElfComdat<'data, 'file, Elf, R>
+where
+    Elf: FileHeader,
+    R: ReadRef<'data>,
+{
+    type SectionIterator = ElfComdatSectionIterator<'data, 'file, Elf, R>;
+
+    #[inline]
+    fn kind(&self) -> ComdatKind {
+        ComdatKind::Any
+    }
+
+    #[inline]
+    fn symbol(&self) -> SymbolIndex {
+        SymbolIndex(self.section.sh_info(self.file.endian) as usize)
+    }
+
+    fn name_bytes(&self) -> read::Result<&[u8]> {
+        // FIXME: check sh_link
+        let index = self.section.sh_info(self.file.endian) as usize;
+        let symbol = self.file.symbols.symbol(index)?;
+        symbol.name(self.file.endian, self.file.symbols.strings())
+    }
+
+    fn name(&self) -> read::Result<&str> {
+        let name = self.name_bytes()?;
+        str::from_utf8(name)
+            .ok()
+            .read_error("Non UTF-8 ELF COMDAT name")
+    }
+
+    fn sections(&self) -> Self::SectionIterator {
+        ElfComdatSectionIterator {
+            file: self.file,
+            sections: self.sections.iter(),
+        }
+    }
+}
+
+/// An iterator over the sections in a COMDAT section group of an `ElfFile32`.
+pub type ElfComdatSectionIterator32<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    ElfComdatSectionIterator<'data, 'file, elf::FileHeader32<Endian>, R>;
+/// An iterator over the sections in a COMDAT section group of an `ElfFile64`.
+pub type ElfComdatSectionIterator64<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    ElfComdatSectionIterator<'data, 'file, elf::FileHeader64<Endian>, R>;
+
+/// An iterator over the sections in a COMDAT section group of an `ElfFile`.
+#[derive(Debug)]
+pub struct ElfComdatSectionIterator<'data, 'file, Elf, R = &'data [u8]>
+where
+    'data: 'file,
+    Elf: FileHeader,
+    R: ReadRef<'data>,
+{
+    file: &'file ElfFile<'data, Elf, R>,
+    sections: slice::Iter<'data, U32Bytes<Elf::Endian>>,
+}
+
+impl<'data, 'file, Elf, R> Iterator for ElfComdatSectionIterator<'data, 'file, Elf, R>
+where
+    Elf: FileHeader,
+    R: ReadRef<'data>,
+{
+    type Item = SectionIndex;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        let index = self.sections.next()?;
+        Some(SectionIndex(index.get(self.file.endian) as usize))
+    }
+}
diff --git a/third_party/rust/object/src/read/elf/compression.rs b/third_party/rust/object/src/read/elf/compression.rs
new file mode 100644
index 0000000000..7242dd39c8
--- /dev/null
+++ b/third_party/rust/object/src/read/elf/compression.rs
@@ -0,0 +1,56 @@
+use core::fmt::Debug;
+
+use crate::elf;
+use crate::endian;
+use crate::pod::Pod;
+
+/// A trait for generic access to `CompressionHeader32` and `CompressionHeader64`.
+#[allow(missing_docs)]
+pub trait CompressionHeader: Debug + Pod {
+    type Word: Into<u64>;
+    type Endian: endian::Endian;
+
+    fn ch_type(&self, endian: Self::Endian) -> u32;
+    fn ch_size(&self, endian: Self::Endian) -> Self::Word;
+    fn ch_addralign(&self, endian: Self::Endian) -> Self::Word;
+}
+
+impl<Endian: endian::Endian> CompressionHeader for elf::CompressionHeader32<Endian> {
+    type Word = u32;
+    type Endian = Endian;
+
+    #[inline]
+    fn ch_type(&self, endian: Self::Endian) -> u32 {
+        self.ch_type.get(endian)
+    }
+
+    #[inline]
+    fn ch_size(&self, endian: Self::Endian) -> Self::Word {
+        self.ch_size.get(endian)
+    }
+
+    #[inline]
+    fn ch_addralign(&self, endian: Self::Endian) -> Self::Word {
+        self.ch_addralign.get(endian)
+    }
+}
+
+impl<Endian: endian::Endian> CompressionHeader for elf::CompressionHeader64<Endian> {
+    type Word = u64;
+    type Endian = Endian;
+
+    #[inline]
+    fn ch_type(&self, endian: Self::Endian) -> u32 {
+        self.ch_type.get(endian)
+    }
+
+    #[inline]
+    fn ch_size(&self, endian: Self::Endian) -> Self::Word {
+        self.ch_size.get(endian)
+    }
+
+    #[inline]
+    fn ch_addralign(&self, endian: Self::Endian) -> Self::Word {
+        self.ch_addralign.get(endian)
+    }
+}
diff --git a/third_party/rust/object/src/read/elf/dynamic.rs b/third_party/rust/object/src/read/elf/dynamic.rs
new file mode 100644
index 0000000000..5fe15b560d
--- /dev/null
+++ b/third_party/rust/object/src/read/elf/dynamic.rs
@@ -0,0 +1,117 @@
+use core::convert::TryInto;
+use core::fmt::Debug;
+
+use crate::elf;
+use crate::endian;
+use crate::pod::Pod;
+use crate::read::{ReadError, Result, StringTable};
+
+/// A trait for generic access to `Dyn32` and `Dyn64`.
+#[allow(missing_docs)]
+pub trait Dyn: Debug + Pod {
+    type Word: Into<u64>;
+    type Endian: endian::Endian;
+
+    fn d_tag(&self, endian: Self::Endian) -> Self::Word;
+    fn d_val(&self, endian: Self::Endian) -> Self::Word;
+
+    /// Try to convert the tag to a `u32`.
+    fn tag32(&self, endian: Self::Endian) -> Option<u32> {
+        self.d_tag(endian).into().try_into().ok()
+    }
+
+    /// Try to convert the value to a `u32`.
+    fn val32(&self, endian: Self::Endian) -> Option<u32> {
+        self.d_val(endian).into().try_into().ok()
+    }
+
+    /// Return true if the value is an offset in the dynamic string table.
+    fn is_string(&self, endian: Self::Endian) -> bool {
+        if let Some(tag) = self.tag32(endian) {
+            match tag {
+                elf::DT_NEEDED
+                | elf::DT_SONAME
+                | elf::DT_RPATH
+                | elf::DT_RUNPATH
+                | elf::DT_AUXILIARY
+                | elf::DT_FILTER => true,
+                _ => false,
+            }
+        } else {
+            false
+        }
+    }
+
+    /// Use the value to get a string in a string table.
+    ///
+    /// Does not check for an appropriate tag.
+    fn string<'data>(
+        &self,
+        endian: Self::Endian,
+        strings: StringTable<'data>,
+    ) -> Result<&'data [u8]> {
+        self.val32(endian)
+            .and_then(|val| strings.get(val).ok())
+            .read_error("Invalid ELF dyn string")
+    }
+
+    /// Return true if the value is an address.
+    fn is_address(&self, endian: Self::Endian) -> bool {
+        if let Some(tag) = self.tag32(endian) {
+            match tag {
+                elf::DT_PLTGOT
+                | elf::DT_HASH
+                | elf::DT_STRTAB
+                | elf::DT_SYMTAB
+                | elf::DT_RELA
+                | elf::DT_INIT
+                | elf::DT_FINI
+                | elf::DT_SYMBOLIC
+                | elf::DT_REL
+                | elf::DT_DEBUG
+                | elf::DT_JMPREL
+                | elf::DT_FINI_ARRAY
+                | elf::DT_INIT_ARRAY
+                | elf::DT_PREINIT_ARRAY
+                | elf::DT_SYMTAB_SHNDX
+                | elf::DT_VERDEF
+                | elf::DT_VERNEED
+                | elf::DT_VERSYM
+                | elf::DT_ADDRRNGLO..=elf::DT_ADDRRNGHI => true,
+                _ => false,
+            }
+        } else {
+            false
+        }
+    }
+}
+
+impl<Endian: endian::Endian> Dyn for elf::Dyn32<Endian> {
+    type Word = u32;
+    type Endian = Endian;
+
+    #[inline]
+    fn d_tag(&self, endian: Self::Endian) -> Self::Word {
+        self.d_tag.get(endian)
+    }
+
+    #[inline]
+    fn d_val(&self, endian: Self::Endian) -> Self::Word {
+        self.d_val.get(endian)
+    }
+}
+
+impl<Endian: endian::Endian> Dyn for elf::Dyn64<Endian> {
+    type Word = u64;
+    type Endian = Endian;
+
+    #[inline]
+    fn d_tag(&self, endian: Self::Endian) -> Self::Word {
+        self.d_tag.get(endian)
+    }
+
+    #[inline]
+    fn d_val(&self, endian: Self::Endian) -> Self::Word {
+        self.d_val.get(endian)
+    }
+}
diff --git a/third_party/rust/object/src/read/elf/file.rs b/third_party/rust/object/src/read/elf/file.rs
new file mode 100644
index 0000000000..259da7906d
--- /dev/null
+++ b/third_party/rust/object/src/read/elf/file.rs
@@ -0,0 +1,885 @@
+use alloc::vec::Vec;
+use core::convert::TryInto;
+use core::fmt::Debug;
+use core::mem;
+
+use crate::read::{
+    self, util, Architecture, ByteString, Bytes, Error, Export, FileFlags, Import, Object,
+    ObjectKind, ReadError, ReadRef, SectionIndex, StringTable, SymbolIndex,
+};
+use crate::{elf, endian, Endian, Endianness, Pod, U32};
+
+use super::{
+    CompressionHeader, Dyn, ElfComdat, ElfComdatIterator, ElfDynamicRelocationIterator, ElfSection,
+    ElfSectionIterator, ElfSegment, ElfSegmentIterator, ElfSymbol, ElfSymbolIterator,
+    ElfSymbolTable, NoteHeader, ProgramHeader, Rel, Rela, RelocationSections, SectionHeader,
+    SectionTable, Sym, SymbolTable,
+};
+
+/// A 32-bit ELF object file.
+pub type ElfFile32<'data, Endian = Endianness, R = &'data [u8]> =
+    ElfFile<'data, elf::FileHeader32<Endian>, R>;
+/// A 64-bit ELF object file.
+pub type ElfFile64<'data, Endian = Endianness, R = &'data [u8]> =
+    ElfFile<'data, elf::FileHeader64<Endian>, R>;
+
+/// A partially parsed ELF file.
+///
+/// Most of the functionality of this type is provided by the `Object` trait implementation.
+#[derive(Debug)]
+pub struct ElfFile<'data, Elf, R = &'data [u8]>
+where
+    Elf: FileHeader,
+    R: ReadRef<'data>,
+{
+    pub(super) endian: Elf::Endian,
+    pub(super) data: R,
+    pub(super) header: &'data Elf,
+    pub(super) segments: &'data [Elf::ProgramHeader],
+    pub(super) sections: SectionTable<'data, Elf, R>,
+    pub(super) relocations: RelocationSections,
+    pub(super) symbols: SymbolTable<'data, Elf, R>,
+    pub(super) dynamic_symbols: SymbolTable<'data, Elf, R>,
+}
+
+impl<'data, Elf, R> ElfFile<'data, Elf, R>
+where
+    Elf: FileHeader,
+    R: ReadRef<'data>,
+{
+    /// Parse the raw ELF file data.
+    pub fn parse(data: R) -> read::Result<Self> {
+        let header = Elf::parse(data)?;
+        let endian = header.endian()?;
+        let segments = header.program_headers(endian, data)?;
+        let sections = header.sections(endian, data)?;
+        let symbols = sections.symbols(endian, data, elf::SHT_SYMTAB)?;
+        // TODO: get dynamic symbols from DT_SYMTAB if there are no sections
+        let dynamic_symbols = sections.symbols(endian, data, elf::SHT_DYNSYM)?;
+        // The API we provide requires a mapping from section to relocations, so build it now.
+        let relocations = sections.relocation_sections(endian, symbols.section())?;
+
+        Ok(ElfFile {
+            endian,
+            data,
+            header,
+            segments,
+            sections,
+            relocations,
+            symbols,
+            dynamic_symbols,
+        })
+    }
+
+    /// Returns the endianness.
+    pub fn endian(&self) -> Elf::Endian {
+        self.endian
+    }
+
+    /// Returns the raw data.
+    pub fn data(&self) -> R {
+        self.data
+    }
+
+    /// Returns the raw ELF file header.
+    pub fn raw_header(&self) -> &'data Elf {
+        self.header
+    }
+
+    /// Returns the raw ELF segments.
+    pub fn raw_segments(&self) -> &'data [Elf::ProgramHeader] {
+        self.segments
+    }
+
+    fn raw_section_by_name<'file>(
+        &'file self,
+        section_name: &[u8],
+    ) -> Option<ElfSection<'data, 'file, Elf, R>> {
+        self.sections
+            .section_by_name(self.endian, section_name)
+            .map(|(index, section)| ElfSection {
+                file: self,
+                index: SectionIndex(index),
+                section,
+            })
+    }
+
+    #[cfg(feature = "compression")]
+    fn zdebug_section_by_name<'file>(
+        &'file self,
+        section_name: &[u8],
+    ) -> Option<ElfSection<'data, 'file, Elf, R>> {
+        if !section_name.starts_with(b".debug_") {
+            return None;
+        }
+        let mut name = Vec::with_capacity(section_name.len() + 1);
+        name.extend_from_slice(b".zdebug_");
+        name.extend_from_slice(&section_name[7..]);
+        self.raw_section_by_name(&name)
+    }
+
+    #[cfg(not(feature = "compression"))]
+    fn zdebug_section_by_name<'file>(
+        &'file self,
+        _section_name: &[u8],
+    ) -> Option<ElfSection<'data, 'file, Elf, R>> {
+        None
+    }
+}
+
+impl<'data, Elf, R> read::private::Sealed for ElfFile<'data, Elf, R>
+where
+    Elf: FileHeader,
+    R: ReadRef<'data>,
+{
+}
+
+impl<'data, 'file, Elf, R> Object<'data, 'file> for ElfFile<'data, Elf, R>
+where
+    'data: 'file,
+    Elf: FileHeader,
+    R: 'file + ReadRef<'data>,
+{
+    type Segment = ElfSegment<'data, 'file, Elf, R>;
+    type SegmentIterator = ElfSegmentIterator<'data, 'file, Elf, R>;
+    type Section = ElfSection<'data, 'file, Elf, R>;
+    type SectionIterator = ElfSectionIterator<'data, 'file, Elf, R>;
+    type Comdat = ElfComdat<'data, 'file, Elf, R>;
+    type ComdatIterator = ElfComdatIterator<'data, 'file, Elf, R>;
+    type Symbol = ElfSymbol<'data, 'file, Elf, R>;
+    type SymbolIterator = ElfSymbolIterator<'data, 'file, Elf, R>;
+    type SymbolTable = ElfSymbolTable<'data, 'file, Elf, R>;
+    type DynamicRelocationIterator = ElfDynamicRelocationIterator<'data, 'file, Elf, R>;
+
+    fn architecture(&self) -> Architecture {
+        match (
+            self.header.e_machine(self.endian),
+            self.header.is_class_64(),
+        ) {
+            (elf::EM_AARCH64, true) => Architecture::Aarch64,
+            (elf::EM_AARCH64, false) => Architecture::Aarch64_Ilp32,
+            (elf::EM_ARM, _) => Architecture::Arm,
+            (elf::EM_AVR, _) => Architecture::Avr,
+            (elf::EM_BPF, _) => Architecture::Bpf,
+            (elf::EM_386, _) => Architecture::I386,
+            (elf::EM_X86_64, false) => Architecture::X86_64_X32,
+            (elf::EM_X86_64, true) => Architecture::X86_64,
+            (elf::EM_HEXAGON, _) => Architecture::Hexagon,
+            (elf::EM_LOONGARCH, true) => Architecture::LoongArch64,
+            (elf::EM_MIPS, false) => Architecture::Mips,
+            (elf::EM_MIPS, true) => Architecture::Mips64,
+            (elf::EM_MSP430, _) => Architecture::Msp430,
+            (elf::EM_PPC, _) => Architecture::PowerPc,
+            (elf::EM_PPC64, _) => Architecture::PowerPc64,
+            (elf::EM_RISCV, false) => Architecture::Riscv32,
+            (elf::EM_RISCV, true) => Architecture::Riscv64,
+            // This is either s390 or s390x, depending on the ELF class.
+            // We only support the 64-bit variant s390x here.
+            (elf::EM_S390, true) => Architecture::S390x,
+            (elf::EM_SBF, _) => Architecture::Sbf,
+            (elf::EM_SPARCV9, true) => Architecture::Sparc64,
+            (elf::EM_XTENSA, false) => Architecture::Xtensa,
+            _ => Architecture::Unknown,
+        }
+    }
+
+    #[inline]
+    fn is_little_endian(&self) -> bool {
+        self.header.is_little_endian()
+    }
+
+    #[inline]
+    fn is_64(&self) -> bool {
+        self.header.is_class_64()
+    }
+
+    fn kind(&self) -> ObjectKind {
+        match self.header.e_type(self.endian) {
+            elf::ET_REL => ObjectKind::Relocatable,
+            elf::ET_EXEC => ObjectKind::Executable,
+            // TODO: check for `DF_1_PIE`?
+            elf::ET_DYN => ObjectKind::Dynamic,
+            elf::ET_CORE => ObjectKind::Core,
+            _ => ObjectKind::Unknown,
+        }
+    }
+
+    fn segments(&'file self) -> ElfSegmentIterator<'data, 'file, Elf, R> {
+        ElfSegmentIterator {
+            file: self,
+            iter: self.segments.iter(),
+        }
+    }
+
+    fn section_by_name_bytes(
+        &'file self,
+        section_name: &[u8],
+    ) -> Option<ElfSection<'data, 'file, Elf, R>> {
+        self.raw_section_by_name(section_name)
+            .or_else(|| self.zdebug_section_by_name(section_name))
+    }
+
+    fn section_by_index(
+        &'file self,
+        index: SectionIndex,
+    ) -> read::Result<ElfSection<'data, 'file, Elf, R>> {
+        let section = self.sections.section(index)?;
+        Ok(ElfSection {
+            file: self,
+            index,
+            section,
+        })
+    }
+
+    fn sections(&'file self) -> ElfSectionIterator<'data, 'file, Elf, R> {
+        ElfSectionIterator {
+            file: self,
+            iter: self.sections.iter().enumerate(),
+        }
+    }
+
+    fn comdats(&'file self) -> ElfComdatIterator<'data, 'file, Elf, R> {
+        ElfComdatIterator {
+            file: self,
+            iter: self.sections.iter().enumerate(),
+        }
+    }
+
+    fn symbol_by_index(
+        &'file self,
+        index: SymbolIndex,
+    ) -> read::Result<ElfSymbol<'data, 'file, Elf, R>> {
+        let symbol = self.symbols.symbol(index.0)?;
+        Ok(ElfSymbol {
+            endian: self.endian,
+            symbols: &self.symbols,
+            index,
+            symbol,
+        })
+    }
+
+    fn symbols(&'file self) -> ElfSymbolIterator<'data, 'file, Elf, R> {
+        ElfSymbolIterator {
+            endian: self.endian,
+            symbols: &self.symbols,
+            index: 0,
+        }
+    }
+
+    fn symbol_table(&'file self) -> Option<ElfSymbolTable<'data, 'file, Elf, R>> {
+        if self.symbols.is_empty() {
+            return None;
+        }
+        Some(ElfSymbolTable {
+            endian: self.endian,
+            symbols: &self.symbols,
+        })
+    }
+
+    fn dynamic_symbols(&'file self) -> ElfSymbolIterator<'data, 'file, Elf, R> {
+        ElfSymbolIterator {
+            endian: self.endian,
+            symbols: &self.dynamic_symbols,
+            index: 0,
+        }
+    }
+
+    fn dynamic_symbol_table(&'file self) -> Option<ElfSymbolTable<'data, 'file, Elf, R>> {
+        if self.dynamic_symbols.is_empty() {
+            return None;
+        }
+        Some(ElfSymbolTable {
+            endian: self.endian,
+            symbols: &self.dynamic_symbols,
+        })
+    }
+
+    fn dynamic_relocations(
+        &'file self,
+    ) -> Option<ElfDynamicRelocationIterator<'data, 'file, Elf, R>> {
+        Some(ElfDynamicRelocationIterator {
+            section_index: SectionIndex(1),
+            file: self,
+            relocations: None,
+        })
+    }
+
+    /// Get the imported symbols.
+    fn imports(&self) -> read::Result<Vec<Import<'data>>> {
+        let mut imports = Vec::new();
+        for symbol in self.dynamic_symbols.iter() {
+            if symbol.is_undefined(self.endian) {
+                let name = symbol.name(self.endian, self.dynamic_symbols.strings())?;
+                if !name.is_empty() {
+                    // TODO: use symbol versioning to determine library
+                    imports.push(Import {
+                        name: ByteString(name),
+                        library: ByteString(&[]),
+                    });
+                }
+            }
+        }
+        Ok(imports)
+    }
+
+    /// Get the exported symbols.
+    fn exports(&self) -> read::Result<Vec<Export<'data>>> {
+        let mut exports = Vec::new();
+        for symbol in self.dynamic_symbols.iter() {
+            if symbol.is_definition(self.endian) {
+                let name = symbol.name(self.endian, self.dynamic_symbols.strings())?;
+                let address = symbol.st_value(self.endian).into();
+                exports.push(Export {
+                    name: ByteString(name),
+                    address,
+                });
+            }
+        }
+        Ok(exports)
+    }
+
+    fn has_debug_symbols(&self) -> bool {
+        for section in self.sections.iter() {
+            if let Ok(name) = self.sections.section_name(self.endian, section) {
+                if name == b".debug_info" || name == b".zdebug_info" {
+                    return true;
+                }
+            }
+        }
+        false
+    }
+
+    fn build_id(&self) -> read::Result<Option<&'data [u8]>> {
+        let endian = self.endian;
+        // Use section headers if present, otherwise use program headers.
+        if !self.sections.is_empty() {
+            for section in self.sections.iter() {
+                if let Some(mut notes) = section.notes(endian, self.data)? {
+                    while let Some(note) = notes.next()? {
+                        if note.name() == elf::ELF_NOTE_GNU
+                            && note.n_type(endian) == elf::NT_GNU_BUILD_ID
+                        {
+                            return Ok(Some(note.desc()));
+                        }
+                    }
+                }
+            }
+        } else {
+            for segment in self.segments {
+                if let Some(mut notes) = segment.notes(endian, self.data)? {
+                    while let Some(note) = notes.next()? {
+                        if note.name() == elf::ELF_NOTE_GNU
+                            && note.n_type(endian) == elf::NT_GNU_BUILD_ID
+                        {
+                            return Ok(Some(note.desc()));
+                        }
+                    }
+                }
+            }
+        }
+        Ok(None)
+    }
+
+    fn gnu_debuglink(&self) -> read::Result<Option<(&'data [u8], u32)>> {
+        let section = match self.raw_section_by_name(b".gnu_debuglink") {
+            Some(section) => section,
+            None => return Ok(None),
+        };
+        let data = section
+            .section
+            .data(self.endian, self.data)
+            .read_error("Invalid ELF .gnu_debuglink section offset or size")
+            .map(Bytes)?;
+        let filename = data
+            .read_string_at(0)
+            .read_error("Missing ELF .gnu_debuglink filename")?;
+        let crc_offset = util::align(filename.len() + 1, 4);
+        let crc = data
+            .read_at::<U32<_>>(crc_offset)
+            .read_error("Missing ELF .gnu_debuglink crc")?
+            .get(self.endian);
+        Ok(Some((filename, crc)))
+    }
+
+    fn gnu_debugaltlink(&self) -> read::Result<Option<(&'data [u8], &'data [u8])>> {
+        let section = match self.raw_section_by_name(b".gnu_debugaltlink") {
+            Some(section) => section,
+            None => return Ok(None),
+        };
+        let mut data = section
+            .section
+            .data(self.endian, self.data)
+            .read_error("Invalid ELF .gnu_debugaltlink section offset or size")
+            .map(Bytes)?;
+        let filename = data
+            .read_string()
+            .read_error("Missing ELF .gnu_debugaltlink filename")?;
+        let build_id = data.0;
+        Ok(Some((filename, build_id)))
+    }
+
+    fn relative_address_base(&self) -> u64 {
+        0
+    }
+
+    fn entry(&self) -> u64 {
+        self.header.e_entry(self.endian).into()
+    }
+
+    fn flags(&self) -> FileFlags {
+        FileFlags::Elf {
+            os_abi: self.header.e_ident().os_abi,
+            abi_version: self.header.e_ident().abi_version,
+            e_flags: self.header.e_flags(self.endian),
+        }
+    }
+}
+
+/// A trait for generic access to `FileHeader32` and `FileHeader64`.
+#[allow(missing_docs)]
+pub trait FileHeader: Debug + Pod {
+    // Ideally this would be a `u64: From<Word>`, but can't express that.
+    type Word: Into<u64>;
+    type Sword: Into<i64>;
+    type Endian: endian::Endian;
+    type ProgramHeader: ProgramHeader<Elf = Self, Endian = Self::Endian, Word = Self::Word>;
+    type SectionHeader: SectionHeader<Elf = Self, Endian = Self::Endian, Word = Self::Word>;
+    type CompressionHeader: CompressionHeader<Endian = Self::Endian, Word = Self::Word>;
+    type NoteHeader: NoteHeader<Endian = Self::Endian>;
+    type Dyn: Dyn<Endian = Self::Endian, Word = Self::Word>;
+    type Sym: Sym<Endian = Self::Endian, Word = Self::Word>;
+    type Rel: Rel<Endian = Self::Endian, Word = Self::Word>;
+    type Rela: Rela<Endian = Self::Endian, Word = Self::Word> + From<Self::Rel>;
+
+    /// Return true if this type is a 64-bit header.
+    ///
+    /// This is a property of the type, not a value in the header data.
+    fn is_type_64(&self) -> bool;
+
+    fn e_ident(&self) -> &elf::Ident;
+    fn e_type(&self, endian: Self::Endian) -> u16;
+    fn e_machine(&self, endian: Self::Endian) -> u16;
+    fn e_version(&self, endian: Self::Endian) -> u32;
+    fn e_entry(&self, endian: Self::Endian) -> Self::Word;
+    fn e_phoff(&self, endian: Self::Endian) -> Self::Word;
+    fn e_shoff(&self, endian: Self::Endian) -> Self::Word;
+    fn e_flags(&self, endian: Self::Endian) -> u32;
+    fn e_ehsize(&self, endian: Self::Endian) -> u16;
+    fn e_phentsize(&self, endian: Self::Endian) -> u16;
+    fn e_phnum(&self, endian: Self::Endian) -> u16;
+    fn e_shentsize(&self, endian: Self::Endian) -> u16;
+    fn e_shnum(&self, endian: Self::Endian) -> u16;
+    fn e_shstrndx(&self, endian: Self::Endian) -> u16;
+
+    // Provided methods.
+
+    /// Read the file header.
+    ///
+    /// Also checks that the ident field in the file header is a supported format.
+    fn parse<'data, R: ReadRef<'data>>(data: R) -> read::Result<&'data Self> {
+        let header = data
+            .read_at::<Self>(0)
+            .read_error("Invalid ELF header size or alignment")?;
+        if !header.is_supported() {
+            return Err(Error("Unsupported ELF header"));
+        }
+        // TODO: Check self.e_ehsize?
+        Ok(header)
+    }
+
+    /// Check that the ident field in the file header is a supported format.
+    ///
+    /// This checks the magic number, version, class, and endianness.
+    fn is_supported(&self) -> bool {
+        let ident = self.e_ident();
+        // TODO: Check self.e_version too? Requires endian though.
+        ident.magic == elf::ELFMAG
+            && (self.is_type_64() || self.is_class_32())
+            && (!self.is_type_64() || self.is_class_64())
+            && (self.is_little_endian() || self.is_big_endian())
+            && ident.version == elf::EV_CURRENT
+    }
+
+    fn is_class_32(&self) -> bool {
+        self.e_ident().class == elf::ELFCLASS32
+    }
+
+    fn is_class_64(&self) -> bool {
+        self.e_ident().class == elf::ELFCLASS64
+    }
+
+    fn is_little_endian(&self) -> bool {
+        self.e_ident().data == elf::ELFDATA2LSB
+    }
+
+    fn is_big_endian(&self) -> bool {
+        self.e_ident().data == elf::ELFDATA2MSB
+    }
+
+    fn endian(&self) -> read::Result<Self::Endian> {
+        Self::Endian::from_big_endian(self.is_big_endian()).read_error("Unsupported ELF endian")
+    }
+
+    /// Return the first section header, if present.
+    ///
+    /// Section 0 is a special case because getting the section headers normally
+    /// requires `shnum`, but `shnum` may be in the first section header.
+    fn section_0<'data, R: ReadRef<'data>>(
+        &self,
+        endian: Self::Endian,
+        data: R,
+    ) -> read::Result<Option<&'data Self::SectionHeader>> {
+        let shoff: u64 = self.e_shoff(endian).into();
+        if shoff == 0 {
+            // No section headers is ok.
+            return Ok(None);
+        }
+        let shentsize = usize::from(self.e_shentsize(endian));
+        if shentsize != mem::size_of::<Self::SectionHeader>() {
+            // Section header size must match.
+            return Err(Error("Invalid ELF section header entry size"));
+        }
+        data.read_at(shoff)
+            .map(Some)
+            .read_error("Invalid ELF section header offset or size")
+    }
+
+    /// Return the `e_phnum` field of the header. Handles extended values.
+    ///
+    /// Returns `Err` for invalid values.
+    fn phnum<'data, R: ReadRef<'data>>(
+        &self,
+        endian: Self::Endian,
+        data: R,
+    ) -> read::Result<usize> {
+        let e_phnum = self.e_phnum(endian);
+        if e_phnum < elf::PN_XNUM {
+            Ok(e_phnum as usize)
+        } else if let Some(section_0) = self.section_0(endian, data)? {
+            Ok(section_0.sh_info(endian) as usize)
+        } else {
+            // Section 0 must exist if e_phnum overflows.
+            Err(Error("Missing ELF section headers for e_phnum overflow"))
+        }
+    }
+
+    /// Return the `e_shnum` field of the header. Handles extended values.
+    ///
+    /// Returns `Err` for invalid values.
+    fn shnum<'data, R: ReadRef<'data>>(
+        &self,
+        endian: Self::Endian,
+        data: R,
+    ) -> read::Result<usize> {
+        let e_shnum = self.e_shnum(endian);
+        if e_shnum > 0 {
+            Ok(e_shnum as usize)
+        } else if let Some(section_0) = self.section_0(endian, data)? {
+            section_0
+                .sh_size(endian)
+                .into()
+                .try_into()
+                .ok()
+                .read_error("Invalid ELF extended e_shnum")
+        } else {
+            // No section headers is ok.
+            Ok(0)
+        }
+    }
+
+    /// Return the `e_shstrndx` field of the header. Handles extended values.
+    ///
+    /// Returns `Err` for invalid values (including if the index is 0).
+    fn shstrndx<'data, R: ReadRef<'data>>(
+        &self,
+        endian: Self::Endian,
+        data: R,
+    ) -> read::Result<u32> {
+        let e_shstrndx = self.e_shstrndx(endian);
+        let index = if e_shstrndx != elf::SHN_XINDEX {
+            e_shstrndx.into()
+        } else if let Some(section_0) = self.section_0(endian, data)? {
+            section_0.sh_link(endian)
+        } else {
+            // Section 0 must exist if we're trying to read e_shstrndx.
+            return Err(Error("Missing ELF section headers for e_shstrndx overflow"));
+        };
+        if index == 0 {
+            return Err(Error("Missing ELF e_shstrndx"));
+        }
+        Ok(index)
+    }
+
+    /// Return the slice of program headers.
+    ///
+    /// Returns `Ok(&[])` if there are no program headers.
+    /// Returns `Err` for invalid values.
+    fn program_headers<'data, R: ReadRef<'data>>(
+        &self,
+        endian: Self::Endian,
+        data: R,
+    ) -> read::Result<&'data [Self::ProgramHeader]> {
+        let phoff: u64 = self.e_phoff(endian).into();
+        if phoff == 0 {
+            // No program headers is ok.
+            return Ok(&[]);
+        }
+        let phnum = self.phnum(endian, data)?;
+        if phnum == 0 {
+            // No program headers is ok.
+            return Ok(&[]);
+        }
+        let phentsize = self.e_phentsize(endian) as usize;
+        if phentsize != mem::size_of::<Self::ProgramHeader>() {
+            // Program header size must match.
+            return Err(Error("Invalid ELF program header entry size"));
+        }
+        data.read_slice_at(phoff, phnum)
+            .read_error("Invalid ELF program header size or alignment")
+    }
+
+    /// Return the slice of section headers.
+    ///
+    /// Returns `Ok(&[])` if there are no section headers.
+    /// Returns `Err` for invalid values.
+    fn section_headers<'data, R: ReadRef<'data>>(
+        &self,
+        endian: Self::Endian,
+        data: R,
+    ) -> read::Result<&'data [Self::SectionHeader]> {
+        let shoff: u64 = self.e_shoff(endian).into();
+        if shoff == 0 {
+            // No section headers is ok.
+            return Ok(&[]);
+        }
+        let shnum = self.shnum(endian, data)?;
+        if shnum == 0 {
+            // No section headers is ok.
+            return Ok(&[]);
+        }
+        let shentsize = usize::from(self.e_shentsize(endian));
+        if shentsize != mem::size_of::<Self::SectionHeader>() {
+            // Section header size must match.
+            return Err(Error("Invalid ELF section header entry size"));
+        }
+        data.read_slice_at(shoff, shnum)
+            .read_error("Invalid ELF section header offset/size/alignment")
+    }
+
+    /// Return the string table for the section headers.
+    fn section_strings<'data, R: ReadRef<'data>>(
+        &self,
+        endian: Self::Endian,
+        data: R,
+        sections: &[Self::SectionHeader],
+    ) -> read::Result<StringTable<'data, R>> {
+        if sections.is_empty() {
+            return Ok(StringTable::default());
+        }
+        let index = self.shstrndx(endian, data)? as usize;
+        let shstrtab = sections.get(index).read_error("Invalid ELF e_shstrndx")?;
+        let strings = if let Some((shstrtab_offset, shstrtab_size)) = shstrtab.file_range(endian) {
+            let shstrtab_end = shstrtab_offset
+                .checked_add(shstrtab_size)
+                .read_error("Invalid ELF shstrtab size")?;
+            StringTable::new(data, shstrtab_offset, shstrtab_end)
+        } else {
+            StringTable::default()
+        };
+        Ok(strings)
+    }
+
+    /// Return the section table.
+    fn sections<'data, R: ReadRef<'data>>(
+        &self,
+        endian: Self::Endian,
+        data: R,
+    ) -> read::Result<SectionTable<'data, Self, R>> {
+        let sections = self.section_headers(endian, data)?;
+        let strings = self.section_strings(endian, data, sections)?;
+        Ok(SectionTable::new(sections, strings))
+    }
+
+    /// Returns whether this is a mips64el elf file.
+    fn is_mips64el(&self, endian: Self::Endian) -> bool {
+        self.is_class_64() && self.is_little_endian() && self.e_machine(endian) == elf::EM_MIPS
+    }
+}
+
+impl<Endian: endian::Endian> FileHeader for elf::FileHeader32<Endian> {
+    type Word = u32;
+    type Sword = i32;
+    type Endian = Endian;
+    type ProgramHeader = elf::ProgramHeader32<Endian>;
+    type SectionHeader = elf::SectionHeader32<Endian>;
+    type CompressionHeader = elf::CompressionHeader32<Endian>;
+    type NoteHeader = elf::NoteHeader32<Endian>;
+    type Dyn = elf::Dyn32<Endian>;
+    type Sym = elf::Sym32<Endian>;
+    type Rel = elf::Rel32<Endian>;
+    type Rela = elf::Rela32<Endian>;
+
+    #[inline]
+    fn is_type_64(&self) -> bool {
+        false
+    }
+
+    #[inline]
+    fn e_ident(&self) -> &elf::Ident {
+        &self.e_ident
+    }
+
+    #[inline]
+    fn e_type(&self, endian: Self::Endian) -> u16 {
+        self.e_type.get(endian)
+    }
+
+    #[inline]
+    fn e_machine(&self, endian: Self::Endian) -> u16 {
+        self.e_machine.get(endian)
+    }
+
+    #[inline]
+    fn e_version(&self, endian: Self::Endian) -> u32 {
+        self.e_version.get(endian)
+    }
+
+    #[inline]
+    fn e_entry(&self, endian: Self::Endian) -> Self::Word {
+        self.e_entry.get(endian)
+    }
+
+    #[inline]
+    fn e_phoff(&self, endian: Self::Endian) -> Self::Word {
+        self.e_phoff.get(endian)
+    }
+
+    #[inline]
+    fn e_shoff(&self, endian: Self::Endian) -> Self::Word {
+        self.e_shoff.get(endian)
+    }
+
+    #[inline]
+    fn e_flags(&self, endian: Self::Endian) -> u32 {
+        self.e_flags.get(endian)
+    }
+
+    #[inline]
+    fn e_ehsize(&self, endian: Self::Endian) -> u16 {
+        self.e_ehsize.get(endian)
+    }
+
+    #[inline]
+    fn e_phentsize(&self, endian: Self::Endian) -> u16 {
+        self.e_phentsize.get(endian)
+    }
+
+    #[inline]
+    fn e_phnum(&self, endian: Self::Endian) -> u16 {
+        self.e_phnum.get(endian)
+    }
+
+    #[inline]
+    fn e_shentsize(&self, endian: Self::Endian) -> u16 {
+        self.e_shentsize.get(endian)
+    }
+
+    #[inline]
+    fn e_shnum(&self, endian: Self::Endian) -> u16 {
+        self.e_shnum.get(endian)
+    }
+
+    #[inline]
+    fn e_shstrndx(&self, endian: Self::Endian) -> u16 {
+        self.e_shstrndx.get(endian)
+    }
+}
+
+impl<Endian: endian::Endian> FileHeader for elf::FileHeader64<Endian> {
+    type Word = u64;
+    type Sword = i64;
+    type Endian = Endian;
+    type ProgramHeader = elf::ProgramHeader64<Endian>;
+    type SectionHeader = elf::SectionHeader64<Endian>;
+    type CompressionHeader = elf::CompressionHeader64<Endian>;
+    type NoteHeader = elf::NoteHeader32<Endian>;
+    type Dyn = elf::Dyn64<Endian>;
+    type Sym = elf::Sym64<Endian>;
+    type Rel = elf::Rel64<Endian>;
+    type Rela = elf::Rela64<Endian>;
+
+    #[inline]
+    fn is_type_64(&self) -> bool {
+        true
+    }
+
+    #[inline]
+    fn e_ident(&self) -> &elf::Ident {
+        &self.e_ident
+    }
+
+    #[inline]
+    fn e_type(&self, endian: Self::Endian) -> u16 {
+        self.e_type.get(endian)
+    }
+
+    #[inline]
+    fn e_machine(&self, endian: Self::Endian) -> u16 {
+        self.e_machine.get(endian)
+    }
+
+    #[inline]
+    fn e_version(&self, endian: Self::Endian) -> u32 {
+        self.e_version.get(endian)
+    }
+
+    #[inline]
+    fn e_entry(&self, endian: Self::Endian) -> Self::Word {
+        self.e_entry.get(endian)
+    }
+
+    #[inline]
+    fn e_phoff(&self, endian: Self::Endian) -> Self::Word {
+        self.e_phoff.get(endian)
+    }
+
+    #[inline]
+    fn e_shoff(&self, endian: Self::Endian) -> Self::Word {
+        self.e_shoff.get(endian)
+    }
+
+    #[inline]
+    fn e_flags(&self, endian: Self::Endian) -> u32 {
+        self.e_flags.get(endian)
+    }
+
+    #[inline]
+    fn e_ehsize(&self, endian: Self::Endian) -> u16 {
+        self.e_ehsize.get(endian)
+    }
+
+    #[inline]
+    fn e_phentsize(&self, endian: Self::Endian) -> u16 {
+        self.e_phentsize.get(endian)
+    }
+
+    #[inline]
+    fn e_phnum(&self, endian: Self::Endian) -> u16 {
+        self.e_phnum.get(endian)
+    }
+
+    #[inline]
+    fn e_shentsize(&self, endian: Self::Endian) -> u16 {
+        self.e_shentsize.get(endian)
+    }
+
+    #[inline]
+    fn e_shnum(&self, endian: Self::Endian) -> u16 {
+        self.e_shnum.get(endian)
+    }
+
+    #[inline]
+    fn e_shstrndx(&self, endian: Self::Endian) -> u16 {
+        self.e_shstrndx.get(endian)
+    }
+}
diff --git a/third_party/rust/object/src/read/elf/hash.rs b/third_party/rust/object/src/read/elf/hash.rs
new file mode 100644
index 0000000000..aa1039ac10
--- /dev/null
+++ b/third_party/rust/object/src/read/elf/hash.rs
@@ -0,0 +1,220 @@
+use core::mem;
+
+use crate::elf;
+use crate::read::{ReadError, ReadRef, Result};
+use crate::{U32, U64};
+
+use super::{FileHeader, Sym, SymbolTable, Version, VersionTable};
+
+/// A SysV symbol hash table in an ELF file.
+#[derive(Debug)]
+pub struct HashTable<'data, Elf: FileHeader> {
+    buckets: &'data [U32<Elf::Endian>],
+    chains: &'data [U32<Elf::Endian>],
+}
+
+impl<'data, Elf: FileHeader> HashTable<'data, Elf> {
+    /// Parse a SysV hash table.
+    ///
+    /// `data` should be from a `SHT_HASH` section, or from a
+    /// segment pointed to via the `DT_HASH` entry.
+    ///
+    /// The header is read at offset 0 in the given `data`.
+    pub fn parse(endian: Elf::Endian, data: &'data [u8]) -> Result<Self> {
+        let mut offset = 0;
+        let header = data
+            .read::<elf::HashHeader<Elf::Endian>>(&mut offset)
+            .read_error("Invalid hash header")?;
+        let buckets = data
+            .read_slice(&mut offset, header.bucket_count.get(endian) as usize)
+            .read_error("Invalid hash buckets")?;
+        let chains = data
+            .read_slice(&mut offset, header.chain_count.get(endian) as usize)
+            .read_error("Invalid hash chains")?;
+        Ok(HashTable { buckets, chains })
+    }
+
+    /// Return the symbol table length.
+    pub fn symbol_table_length(&self) -> u32 {
+        self.chains.len() as u32
+    }
+
+    /// Use the hash table to find the symbol table entry with the given name, hash and version.
+    pub fn find<R: ReadRef<'data>>(
+        &self,
+        endian: Elf::Endian,
+        name: &[u8],
+        hash: u32,
+        version: Option<&Version>,
+        symbols: &SymbolTable<'data, Elf, R>,
+        versions: &VersionTable<'data, Elf>,
+    ) -> Option<(usize, &'data Elf::Sym)> {
+        // Get the chain start from the bucket for this hash.
+        let mut index = self.buckets[(hash as usize) % self.buckets.len()].get(endian) as usize;
+        // Avoid infinite loop.
+        let mut i = 0;
+        let strings = symbols.strings();
+        while index != 0 && i < self.chains.len() {
+            if let Ok(symbol) = symbols.symbol(index) {
+                if symbol.name(endian, strings) == Ok(name)
+                    && versions.matches(endian, index, version)
+                {
+                    return Some((index, symbol));
+                }
+            }
+            index = self.chains.get(index)?.get(endian) as usize;
+            i += 1;
+        }
+        None
+    }
+}
+
+/// A GNU symbol hash table in an ELF file.
+#[derive(Debug)]
+pub struct GnuHashTable<'data, Elf: FileHeader> {
+    symbol_base: u32,
+    bloom_shift: u32,
+    bloom_filters: &'data [u8],
+    buckets: &'data [U32<Elf::Endian>],
+    values: &'data [U32<Elf::Endian>],
+}
+
+impl<'data, Elf: FileHeader> GnuHashTable<'data, Elf> {
+    /// Parse a GNU hash table.
+    ///
+    /// `data` should be from a `SHT_GNU_HASH` section, or from a
+    /// segment pointed to via the `DT_GNU_HASH` entry.
+    ///
+    /// The header is read at offset 0 in the given `data`.
+    ///
+    /// The header does not contain a length field, and so all of `data`
+    /// will be used as the hash table values. It does not matter if this
+    /// is longer than needed, and this will often the case when accessing
+    /// the hash table via the `DT_GNU_HASH` entry.
+    pub fn parse(endian: Elf::Endian, data: &'data [u8]) -> Result<Self> {
+        let mut offset = 0;
+        let header = data
+            .read::<elf::GnuHashHeader<Elf::Endian>>(&mut offset)
+            .read_error("Invalid GNU hash header")?;
+        let bloom_len =
+            u64::from(header.bloom_count.get(endian)) * mem::size_of::<Elf::Word>() as u64;
+        let bloom_filters = data
+            .read_bytes(&mut offset, bloom_len)
+            .read_error("Invalid GNU hash bloom filters")?;
+        let buckets = data
+            .read_slice(&mut offset, header.bucket_count.get(endian) as usize)
+            .read_error("Invalid GNU hash buckets")?;
+        let chain_count = (data.len() - offset as usize) / 4;
+        let values = data
+            .read_slice(&mut offset, chain_count)
+            .read_error("Invalid GNU hash values")?;
+        Ok(GnuHashTable {
+            symbol_base: header.symbol_base.get(endian),
+            bloom_shift: header.bloom_shift.get(endian),
+            bloom_filters,
+            buckets,
+            values,
+        })
+    }
+
+    /// Return the symbol table index of the first symbol in the hash table.
+    pub fn symbol_base(&self) -> u32 {
+        self.symbol_base
+    }
+
+    /// Determine the symbol table length by finding the last entry in the hash table.
+    ///
+    /// Returns `None` if the hash table is empty or invalid.
+    pub fn symbol_table_length(&self, endian: Elf::Endian) -> Option<u32> {
+        // Ensure we find a non-empty bucket.
+        if self.symbol_base == 0 {
+            return None;
+        }
+
+        // Find the highest chain index in a bucket.
+        let mut max_symbol = 0;
+        for bucket in self.buckets {
+            let bucket = bucket.get(endian);
+            if max_symbol < bucket {
+                max_symbol = bucket;
+            }
+        }
+
+        // Find the end of the chain.
+        for value in self
+            .values
+            .get(max_symbol.checked_sub(self.symbol_base)? as usize..)?
+        {
+            max_symbol += 1;
+            if value.get(endian) & 1 != 0 {
+                return Some(max_symbol);
+            }
+        }
+
+        None
+    }
+
+    /// Use the hash table to find the symbol table entry with the given name, hash, and version.
+    pub fn find<R: ReadRef<'data>>(
+        &self,
+        endian: Elf::Endian,
+        name: &[u8],
+        hash: u32,
+        version: Option<&Version>,
+        symbols: &SymbolTable<'data, Elf, R>,
+        versions: &VersionTable<'data, Elf>,
+    ) -> Option<(usize, &'data Elf::Sym)> {
+        let word_bits = mem::size_of::<Elf::Word>() as u32 * 8;
+
+        // Test against bloom filter.
+        let bloom_count = self.bloom_filters.len() / mem::size_of::<Elf::Word>();
+        let offset =
+            ((hash / word_bits) & (bloom_count as u32 - 1)) * mem::size_of::<Elf::Word>() as u32;
+        let filter = if word_bits == 64 {
+            self.bloom_filters
+                .read_at::<U64<Elf::Endian>>(offset.into())
+                .ok()?
+                .get(endian)
+        } else {
+            self.bloom_filters
+                .read_at::<U32<Elf::Endian>>(offset.into())
+                .ok()?
+                .get(endian)
+                .into()
+        };
+        if filter & (1 << (hash % word_bits)) == 0 {
+            return None;
+        }
+        if filter & (1 << ((hash >> self.bloom_shift) % word_bits)) == 0 {
+            return None;
+        }
+
+        // Get the chain start from the bucket for this hash.
+        let mut index = self.buckets[(hash as usize) % self.buckets.len()].get(endian) as usize;
+        if index == 0 {
+            return None;
+        }
+
+        // Test symbols in the chain.
+        let strings = symbols.strings();
+        let symbols = symbols.symbols().get(index..)?;
+        let values = self
+            .values
+            .get(index.checked_sub(self.symbol_base as usize)?..)?;
+        for (symbol, value) in symbols.iter().zip(values.iter()) {
+            let value = value.get(endian);
+            if value | 1 == hash | 1 {
+                if symbol.name(endian, strings) == Ok(name)
+                    && versions.matches(endian, index, version)
+                {
+                    return Some((index, symbol));
+                }
+            }
+            if value & 1 != 0 {
+                break;
+            }
+            index += 1;
+        }
+        None
+    }
+}
diff --git a/third_party/rust/object/src/read/elf/mod.rs b/third_party/rust/object/src/read/elf/mod.rs
new file mode 100644
index 0000000000..5b7d7f9f7f
--- /dev/null
+++ b/third_party/rust/object/src/read/elf/mod.rs
@@ -0,0 +1,39 @@
+//! Support for reading ELF files.
+//!
+//! Defines traits to abstract over the difference between ELF32/ELF64,
+//! and implements read functionality in terms of these traits.
+//!
+//! Also provides `ElfFile` and related types which implement the `Object` trait.
+
+mod file;
+pub use file::*;
+
+mod segment;
+pub use segment::*;
+
+mod section;
+pub use section::*;
+
+mod symbol;
+pub use symbol::*;
+
+mod relocation;
+pub use relocation::*;
+
+mod comdat;
+pub use comdat::*;
+
+mod dynamic;
+pub use dynamic::*;
+
+mod compression;
+pub use compression::*;
+
+mod note;
+pub use note::*;
+
+mod hash;
+pub use hash::*;
+
+mod version;
+pub use version::*;
diff --git a/third_party/rust/object/src/read/elf/note.rs b/third_party/rust/object/src/read/elf/note.rs
new file mode 100644
index 0000000000..34024dbb89
--- /dev/null
+++ b/third_party/rust/object/src/read/elf/note.rs
@@ -0,0 +1,185 @@
+use core::fmt::Debug;
+use core::mem;
+
+use crate::elf;
+use crate::endian;
+use crate::pod::Pod;
+use crate::read::util;
+use crate::read::{self, Bytes, Error, ReadError};
+
+use super::FileHeader;
+
+/// An iterator over the notes in an ELF section or segment.
+#[derive(Debug)]
+pub struct NoteIterator<'data, Elf>
+where
+    Elf: FileHeader,
+{
+    endian: Elf::Endian,
+    align: usize,
+    data: Bytes<'data>,
+}
+
+impl<'data, Elf> NoteIterator<'data, Elf>
+where
+    Elf: FileHeader,
+{
+    /// Returns `Err` if `align` is invalid.
+    pub(super) fn new(
+        endian: Elf::Endian,
+        align: Elf::Word,
+        data: &'data [u8],
+    ) -> read::Result<Self> {
+        let align = match align.into() {
+            0u64..=4 => 4,
+            8 => 8,
+            _ => return Err(Error("Invalid ELF note alignment")),
+        };
+        // TODO: check data alignment?
+        Ok(NoteIterator {
+            endian,
+            align,
+            data: Bytes(data),
+        })
+    }
+
+    /// Returns the next note.
+    pub fn next(&mut self) -> read::Result<Option<Note<'data, Elf>>> {
+        let mut data = self.data;
+        if data.is_empty() {
+            return Ok(None);
+        }
+
+        let header = data
+            .read_at::<Elf::NoteHeader>(0)
+            .read_error("ELF note is too short")?;
+
+        // The name has no alignment requirement.
+        let offset = mem::size_of::<Elf::NoteHeader>();
+        let namesz = header.n_namesz(self.endian) as usize;
+        let name = data
+            .read_bytes_at(offset, namesz)
+            .read_error("Invalid ELF note namesz")?
+            .0;
+
+        // The descriptor must be aligned.
+        let offset = util::align(offset + namesz, self.align);
+        let descsz = header.n_descsz(self.endian) as usize;
+        let desc = data
+            .read_bytes_at(offset, descsz)
+            .read_error("Invalid ELF note descsz")?
+            .0;
+
+        // The next note (if any) must be aligned.
+        let offset = util::align(offset + descsz, self.align);
+        if data.skip(offset).is_err() {
+            data = Bytes(&[]);
+        }
+        self.data = data;
+
+        Ok(Some(Note { header, name, desc }))
+    }
+}
+
+/// A parsed `NoteHeader`.
+#[derive(Debug)]
+pub struct Note<'data, Elf>
+where
+    Elf: FileHeader,
+{
+    header: &'data Elf::NoteHeader,
+    name: &'data [u8],
+    desc: &'data [u8],
+}
+
+impl<'data, Elf: FileHeader> Note<'data, Elf> {
+    /// Return the `n_type` field of the `NoteHeader`.
+    ///
+    /// The meaning of this field is determined by `name`.
+    pub fn n_type(&self, endian: Elf::Endian) -> u32 {
+        self.header.n_type(endian)
+    }
+
+    /// Return the `n_namesz` field of the `NoteHeader`.
+    pub fn n_namesz(&self, endian: Elf::Endian) -> u32 {
+        self.header.n_namesz(endian)
+    }
+
+    /// Return the `n_descsz` field of the `NoteHeader`.
+    pub fn n_descsz(&self, endian: Elf::Endian) -> u32 {
+        self.header.n_descsz(endian)
+    }
+
+    /// Return the bytes for the name field following the `NoteHeader`,
+    /// excluding any null terminator.
+    ///
+    /// This field is usually a string including a null terminator
+    /// (but it is not required to be).
+    ///
+    /// The length of this field (including any null terminator) is given by
+    /// `n_namesz`.
+    pub fn name(&self) -> &'data [u8] {
+        if let Some((last, name)) = self.name.split_last() {
+            if *last == 0 {
+                return name;
+            }
+        }
+        self.name
+    }
+
+    /// Return the bytes for the desc field following the `NoteHeader`.
+    ///
+    /// The length of this field is given by `n_descsz`. The meaning
+    /// of this field is determined by `name` and `n_type`.
+    pub fn desc(&self) -> &'data [u8] {
+        self.desc
+    }
+}
+
+/// A trait for generic access to `NoteHeader32` and `NoteHeader64`.
+#[allow(missing_docs)]
+pub trait NoteHeader: Debug + Pod {
+    type Endian: endian::Endian;
+
+    fn n_namesz(&self, endian: Self::Endian) -> u32;
+    fn n_descsz(&self, endian: Self::Endian) -> u32;
+    fn n_type(&self, endian: Self::Endian) -> u32;
+}
+
+impl<Endian: endian::Endian> NoteHeader for elf::NoteHeader32<Endian> {
+    type Endian = Endian;
+
+    #[inline]
+    fn n_namesz(&self, endian: Self::Endian) -> u32 {
+        self.n_namesz.get(endian)
+    }
+
+    #[inline]
+    fn n_descsz(&self, endian: Self::Endian) -> u32 {
+        self.n_descsz.get(endian)
+    }
+
+    #[inline]
+    fn n_type(&self, endian: Self::Endian) -> u32 {
+        self.n_type.get(endian)
+    }
+}
+
+impl<Endian: endian::Endian> NoteHeader for elf::NoteHeader64<Endian> {
+    type Endian = Endian;
+
+    #[inline]
+    fn n_namesz(&self, endian: Self::Endian) -> u32 {
+        self.n_namesz.get(endian)
+    }
+
+    #[inline]
+    fn n_descsz(&self, endian: Self::Endian) -> u32 {
+        self.n_descsz.get(endian)
+    }
+
+    #[inline]
+    fn n_type(&self, endian: Self::Endian) -> u32 {
+        self.n_type.get(endian)
+    }
+}
diff --git a/third_party/rust/object/src/read/elf/relocation.rs b/third_party/rust/object/src/read/elf/relocation.rs
new file mode 100644
index 0000000000..8443dbc750
--- /dev/null
+++ b/third_party/rust/object/src/read/elf/relocation.rs
@@ -0,0 +1,571 @@
+use alloc::fmt;
+use alloc::vec::Vec;
+use core::fmt::Debug;
+use core::slice;
+
+use crate::elf;
+use crate::endian::{self, Endianness};
+use crate::pod::Pod;
+use crate::read::{
+    self, Error, ReadRef, Relocation, RelocationEncoding, RelocationKind, RelocationTarget,
+    SectionIndex, SymbolIndex,
+};
+
+use super::{ElfFile, FileHeader, SectionHeader, SectionTable};
+
+/// A mapping from section index to associated relocation sections.
+#[derive(Debug)]
+pub struct RelocationSections {
+    relocations: Vec<usize>,
+}
+
+impl RelocationSections {
+    /// Create a new mapping using the section table.
+    ///
+    /// Skips relocation sections that do not use the given symbol table section.
+    pub fn parse<'data, Elf: FileHeader, R: ReadRef<'data>>(
+        endian: Elf::Endian,
+        sections: &SectionTable<'data, Elf, R>,
+        symbol_section: SectionIndex,
+    ) -> read::Result<Self> {
+        let mut relocations = vec![0; sections.len()];
+        for (index, section) in sections.iter().enumerate().rev() {
+            let sh_type = section.sh_type(endian);
+            if sh_type == elf::SHT_REL || sh_type == elf::SHT_RELA {
+                // The symbol indices used in relocations must be for the symbol table
+                // we are expecting to use.
+                let sh_link = SectionIndex(section.sh_link(endian) as usize);
+                if sh_link != symbol_section {
+                    continue;
+                }
+
+                let sh_info = section.sh_info(endian) as usize;
+                if sh_info == 0 {
+                    // Skip dynamic relocations.
+                    continue;
+                }
+                if sh_info >= relocations.len() {
+                    return Err(Error("Invalid ELF sh_info for relocation section"));
+                }
+
+                // Handle multiple relocation sections by chaining them.
+                let next = relocations[sh_info];
+                relocations[sh_info] = index;
+                relocations[index] = next;
+            }
+        }
+        Ok(Self { relocations })
+    }
+
+    /// Given a section index, return the section index of the associated relocation section.
+    ///
+    /// This may also be called with a relocation section index, and it will return the
+    /// next associated relocation section.
+    pub fn get(&self, index: usize) -> Option<usize> {
+        self.relocations.get(index).cloned().filter(|x| *x != 0)
+    }
+}
+
+pub(super) enum ElfRelaIterator<'data, Elf: FileHeader> {
+    Rel(slice::Iter<'data, Elf::Rel>),
+    Rela(slice::Iter<'data, Elf::Rela>),
+}
+
+impl<'data, Elf: FileHeader> ElfRelaIterator<'data, Elf> {
+    fn is_rel(&self) -> bool {
+        match self {
+            ElfRelaIterator::Rel(_) => true,
+            ElfRelaIterator::Rela(_) => false,
+        }
+    }
+}
+
+impl<'data, Elf: FileHeader> Iterator for ElfRelaIterator<'data, Elf> {
+    type Item = Elf::Rela;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        match self {
+            ElfRelaIterator::Rel(ref mut i) => i.next().cloned().map(Self::Item::from),
+            ElfRelaIterator::Rela(ref mut i) => i.next().cloned(),
+        }
+    }
+}
+
+/// An iterator over the dynamic relocations for an `ElfFile32`.
+pub type ElfDynamicRelocationIterator32<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    ElfDynamicRelocationIterator<'data, 'file, elf::FileHeader32<Endian>, R>;
+/// An iterator over the dynamic relocations for an `ElfFile64`.
+pub type ElfDynamicRelocationIterator64<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    ElfDynamicRelocationIterator<'data, 'file, elf::FileHeader64<Endian>, R>;
+
+/// An iterator over the dynamic relocations for an `ElfFile`.
+pub struct ElfDynamicRelocationIterator<'data, 'file, Elf, R = &'data [u8]>
+where
+    Elf: FileHeader,
+    R: ReadRef<'data>,
+{
+    /// The current relocation section index.
+    pub(super) section_index: SectionIndex,
+    pub(super) file: &'file ElfFile<'data, Elf, R>,
+    pub(super) relocations: Option<ElfRelaIterator<'data, Elf>>,
+}
+
+impl<'data, 'file, Elf, R> Iterator for ElfDynamicRelocationIterator<'data, 'file, Elf, R>
+where
+    Elf: FileHeader,
+    R: ReadRef<'data>,
+{
+    type Item = (u64, Relocation);
+
+    fn next(&mut self) -> Option<Self::Item> {
+        let endian = self.file.endian;
+        loop {
+            if let Some(ref mut relocations) = self.relocations {
+                if let Some(reloc) = relocations.next() {
+                    let relocation =
+                        parse_relocation(self.file.header, endian, reloc, relocations.is_rel());
+                    return Some((reloc.r_offset(endian).into(), relocation));
+                }
+                self.relocations = None;
+            }
+
+            let section = self.file.sections.section(self.section_index).ok()?;
+            self.section_index.0 += 1;
+
+            let sh_link = SectionIndex(section.sh_link(endian) as usize);
+            if sh_link != self.file.dynamic_symbols.section() {
+                continue;
+            }
+
+            match section.sh_type(endian) {
+                elf::SHT_REL => {
+                    if let Ok(relocations) = section.data_as_array(endian, self.file.data) {
+                        self.relocations = Some(ElfRelaIterator::Rel(relocations.iter()));
+                    }
+                }
+                elf::SHT_RELA => {
+                    if let Ok(relocations) = section.data_as_array(endian, self.file.data) {
+                        self.relocations = Some(ElfRelaIterator::Rela(relocations.iter()));
+                    }
+                }
+                _ => {}
+            }
+        }
+    }
+}
+
+impl<'data, 'file, Elf, R> fmt::Debug for ElfDynamicRelocationIterator<'data, 'file, Elf, R>
+where
+    Elf: FileHeader,
+    R: ReadRef<'data>,
+{
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("ElfDynamicRelocationIterator").finish()
+    }
+}
+
+/// An iterator over the relocations for an `ElfSection32`.
+pub type ElfSectionRelocationIterator32<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    ElfSectionRelocationIterator<'data, 'file, elf::FileHeader32<Endian>, R>;
+/// An iterator over the relocations for an `ElfSection64`.
+pub type ElfSectionRelocationIterator64<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    ElfSectionRelocationIterator<'data, 'file, elf::FileHeader64<Endian>, R>;
+
+/// An iterator over the relocations for an `ElfSection`.
+pub struct ElfSectionRelocationIterator<'data, 'file, Elf, R = &'data [u8]>
+where
+    Elf: FileHeader,
+    R: ReadRef<'data>,
+{
+    /// The current pointer in the chain of relocation sections.
+    pub(super) section_index: SectionIndex,
+    pub(super) file: &'file ElfFile<'data, Elf, R>,
+    pub(super) relocations: Option<ElfRelaIterator<'data, Elf>>,
+}
+
+impl<'data, 'file, Elf, R> Iterator for ElfSectionRelocationIterator<'data, 'file, Elf, R>
+where
+    Elf: FileHeader,
+    R: ReadRef<'data>,
+{
+    type Item = (u64, Relocation);
+
+    fn next(&mut self) -> Option<Self::Item> {
+        let endian = self.file.endian;
+        loop {
+            if let Some(ref mut relocations) = self.relocations {
+                if let Some(reloc) = relocations.next() {
+                    let relocation =
+                        parse_relocation(self.file.header, endian, reloc, relocations.is_rel());
+                    return Some((reloc.r_offset(endian).into(), relocation));
+                }
+                self.relocations = None;
+            }
+            self.section_index = SectionIndex(self.file.relocations.get(self.section_index.0)?);
+            // The construction of RelocationSections ensures section_index is valid.
+            let section = self.file.sections.section(self.section_index).unwrap();
+            match section.sh_type(endian) {
+                elf::SHT_REL => {
+                    if let Ok(relocations) = section.data_as_array(endian, self.file.data) {
+                        self.relocations = Some(ElfRelaIterator::Rel(relocations.iter()));
+                    }
+                }
+                elf::SHT_RELA => {
+                    if let Ok(relocations) = section.data_as_array(endian, self.file.data) {
+                        self.relocations = Some(ElfRelaIterator::Rela(relocations.iter()));
+                    }
+                }
+                _ => {}
+            }
+        }
+    }
+}
+
+impl<'data, 'file, Elf, R> fmt::Debug for ElfSectionRelocationIterator<'data, 'file, Elf, R>
+where
+    Elf: FileHeader,
+    R: ReadRef<'data>,
+{
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("ElfSectionRelocationIterator").finish()
+    }
+}
+
+fn parse_relocation<Elf: FileHeader>(
+    header: &Elf,
+    endian: Elf::Endian,
+    reloc: Elf::Rela,
+    implicit_addend: bool,
+) -> Relocation {
+    let mut encoding = RelocationEncoding::Generic;
+    let is_mips64el = header.is_mips64el(endian);
+    let (kind, size) = match header.e_machine(endian) {
+        elf::EM_AARCH64 => {
+            if header.is_type_64() {
+                match reloc.r_type(endian, false) {
+                    elf::R_AARCH64_ABS64 => (RelocationKind::Absolute, 64),
+                    elf::R_AARCH64_ABS32 => (RelocationKind::Absolute, 32),
+                    elf::R_AARCH64_ABS16 => (RelocationKind::Absolute, 16),
+                    elf::R_AARCH64_PREL64 => (RelocationKind::Relative, 64),
+                    elf::R_AARCH64_PREL32 => (RelocationKind::Relative, 32),
+                    elf::R_AARCH64_PREL16 => (RelocationKind::Relative, 16),
+                    elf::R_AARCH64_CALL26 => {
+                        encoding = RelocationEncoding::AArch64Call;
+                        (RelocationKind::PltRelative, 26)
+                    }
+                    r_type => (RelocationKind::Elf(r_type), 0),
+                }
+            } else {
+                match reloc.r_type(endian, false) {
+                    elf::R_AARCH64_P32_ABS32 => (RelocationKind::Absolute, 32),
+                    r_type => (RelocationKind::Elf(r_type), 0),
+                }
+            }
+        }
+        elf::EM_ARM => match reloc.r_type(endian, false) {
+            elf::R_ARM_ABS32 => (RelocationKind::Absolute, 32),
+            r_type => (RelocationKind::Elf(r_type), 0),
+        },
+        elf::EM_AVR => match reloc.r_type(endian, false) {
+            elf::R_AVR_32 => (RelocationKind::Absolute, 32),
+            elf::R_AVR_16 => (RelocationKind::Absolute, 16),
+            r_type => (RelocationKind::Elf(r_type), 0),
+        },
+        elf::EM_BPF => match reloc.r_type(endian, false) {
+            elf::R_BPF_64_64 => (RelocationKind::Absolute, 64),
+            elf::R_BPF_64_32 => (RelocationKind::Absolute, 32),
+            r_type => (RelocationKind::Elf(r_type), 0),
+        },
+        elf::EM_386 => match reloc.r_type(endian, false) {
+            elf::R_386_32 => (RelocationKind::Absolute, 32),
+            elf::R_386_PC32 => (RelocationKind::Relative, 32),
+            elf::R_386_GOT32 => (RelocationKind::Got, 32),
+            elf::R_386_PLT32 => (RelocationKind::PltRelative, 32),
+            elf::R_386_GOTOFF => (RelocationKind::GotBaseOffset, 32),
+            elf::R_386_GOTPC => (RelocationKind::GotBaseRelative, 32),
+            elf::R_386_16 => (RelocationKind::Absolute, 16),
+            elf::R_386_PC16 => (RelocationKind::Relative, 16),
+            elf::R_386_8 => (RelocationKind::Absolute, 8),
+            elf::R_386_PC8 => (RelocationKind::Relative, 8),
+            r_type => (RelocationKind::Elf(r_type), 0),
+        },
+        elf::EM_X86_64 => match reloc.r_type(endian, false) {
+            elf::R_X86_64_64 => (RelocationKind::Absolute, 64),
+            elf::R_X86_64_PC32 => (RelocationKind::Relative, 32),
+            elf::R_X86_64_GOT32 => (RelocationKind::Got, 32),
+            elf::R_X86_64_PLT32 => (RelocationKind::PltRelative, 32),
+            elf::R_X86_64_GOTPCREL => (RelocationKind::GotRelative, 32),
+            elf::R_X86_64_32 => (RelocationKind::Absolute, 32),
+            elf::R_X86_64_32S => {
+                encoding = RelocationEncoding::X86Signed;
+                (RelocationKind::Absolute, 32)
+            }
+            elf::R_X86_64_16 => (RelocationKind::Absolute, 16),
+            elf::R_X86_64_PC16 => (RelocationKind::Relative, 16),
+            elf::R_X86_64_8 => (RelocationKind::Absolute, 8),
+            elf::R_X86_64_PC8 => (RelocationKind::Relative, 8),
+            r_type => (RelocationKind::Elf(r_type), 0),
+        },
+        elf::EM_HEXAGON => match reloc.r_type(endian, false) {
+            elf::R_HEX_32 => (RelocationKind::Absolute, 32),
+            r_type => (RelocationKind::Elf(r_type), 0),
+        },
+        elf::EM_LOONGARCH => match reloc.r_type(endian, false) {
+            elf::R_LARCH_32 => (RelocationKind::Absolute, 32),
+            elf::R_LARCH_64 => (RelocationKind::Absolute, 64),
+            elf::R_LARCH_32_PCREL => (RelocationKind::Relative, 32),
+            elf::R_LARCH_B16 => {
+                encoding = RelocationEncoding::LoongArchBranch;
+                (RelocationKind::Relative, 16)
+            }
+            elf::R_LARCH_B21 => {
+                encoding = RelocationEncoding::LoongArchBranch;
+                (RelocationKind::Relative, 21)
+            }
+            elf::R_LARCH_B26 => {
+                encoding = RelocationEncoding::LoongArchBranch;
+                (RelocationKind::Relative, 26)
+            }
+            r_type => (RelocationKind::Elf(r_type), 0),
+        },
+        elf::EM_MIPS => match reloc.r_type(endian, is_mips64el) {
+            elf::R_MIPS_16 => (RelocationKind::Absolute, 16),
+            elf::R_MIPS_32 => (RelocationKind::Absolute, 32),
+            elf::R_MIPS_64 => (RelocationKind::Absolute, 64),
+            r_type => (RelocationKind::Elf(r_type), 0),
+        },
+        elf::EM_MSP430 => match reloc.r_type(endian, false) {
+            elf::R_MSP430_32 => (RelocationKind::Absolute, 32),
+            elf::R_MSP430_16_BYTE => (RelocationKind::Absolute, 16),
+            r_type => (RelocationKind::Elf(r_type), 0),
+        },
+        elf::EM_PPC => match reloc.r_type(endian, false) {
+            elf::R_PPC_ADDR32 => (RelocationKind::Absolute, 32),
+            r_type => (RelocationKind::Elf(r_type), 0),
+        },
+        elf::EM_PPC64 => match reloc.r_type(endian, false) {
+            elf::R_PPC64_ADDR32 => (RelocationKind::Absolute, 32),
+            elf::R_PPC64_ADDR64 => (RelocationKind::Absolute, 64),
+            r_type => (RelocationKind::Elf(r_type), 0),
+        },
+        elf::EM_RISCV => match reloc.r_type(endian, false) {
+            elf::R_RISCV_32 => (RelocationKind::Absolute, 32),
+            elf::R_RISCV_64 => (RelocationKind::Absolute, 64),
+            r_type => (RelocationKind::Elf(r_type), 0),
+        },
+        elf::EM_S390 => match reloc.r_type(endian, false) {
+            elf::R_390_8 => (RelocationKind::Absolute, 8),
+            elf::R_390_16 => (RelocationKind::Absolute, 16),
+            elf::R_390_32 => (RelocationKind::Absolute, 32),
+            elf::R_390_64 => (RelocationKind::Absolute, 64),
+            elf::R_390_PC16 => (RelocationKind::Relative, 16),
+            elf::R_390_PC32 => (RelocationKind::Relative, 32),
+            elf::R_390_PC64 => (RelocationKind::Relative, 64),
+            elf::R_390_PC16DBL => {
+                encoding = RelocationEncoding::S390xDbl;
+                (RelocationKind::Relative, 16)
+            }
+            elf::R_390_PC32DBL => {
+                encoding = RelocationEncoding::S390xDbl;
+                (RelocationKind::Relative, 32)
+            }
+            elf::R_390_PLT16DBL => {
+                encoding = RelocationEncoding::S390xDbl;
+                (RelocationKind::PltRelative, 16)
+            }
+            elf::R_390_PLT32DBL => {
+                encoding = RelocationEncoding::S390xDbl;
+                (RelocationKind::PltRelative, 32)
+            }
+            elf::R_390_GOT16 => (RelocationKind::Got, 16),
+            elf::R_390_GOT32 => (RelocationKind::Got, 32),
+            elf::R_390_GOT64 => (RelocationKind::Got, 64),
+            elf::R_390_GOTENT => {
+                encoding = RelocationEncoding::S390xDbl;
+                (RelocationKind::GotRelative, 32)
+            }
+            elf::R_390_GOTOFF16 => (RelocationKind::GotBaseOffset, 16),
+            elf::R_390_GOTOFF32 => (RelocationKind::GotBaseOffset, 32),
+            elf::R_390_GOTOFF64 => (RelocationKind::GotBaseOffset, 64),
+            elf::R_390_GOTPC => (RelocationKind::GotBaseRelative, 64),
+            elf::R_390_GOTPCDBL => {
+                encoding = RelocationEncoding::S390xDbl;
+                (RelocationKind::GotBaseRelative, 32)
+            }
+            r_type => (RelocationKind::Elf(r_type), 0),
+        },
+        elf::EM_SBF => match reloc.r_type(endian, false) {
+            elf::R_SBF_64_64 => (RelocationKind::Absolute, 64),
+            elf::R_SBF_64_32 => (RelocationKind::Absolute, 32),
+            r_type => (RelocationKind::Elf(r_type), 0),
+        },
+        elf::EM_SPARC | elf::EM_SPARC32PLUS | elf::EM_SPARCV9 => {
+            match reloc.r_type(endian, false) {
+                elf::R_SPARC_32 | elf::R_SPARC_UA32 => (RelocationKind::Absolute, 32),
+                elf::R_SPARC_64 | elf::R_SPARC_UA64 => (RelocationKind::Absolute, 64),
+                r_type => (RelocationKind::Elf(r_type), 0),
+            }
+        }
+        elf::EM_XTENSA => match reloc.r_type(endian, false) {
+            elf::R_XTENSA_32 => (RelocationKind::Absolute, 32),
+            elf::R_XTENSA_32_PCREL => (RelocationKind::Relative, 32),
+            r_type => (RelocationKind::Elf(r_type), 0),
+        },
+        _ => (RelocationKind::Elf(reloc.r_type(endian, false)), 0),
+    };
+    let sym = reloc.r_sym(endian, is_mips64el) as usize;
+    let target = if sym == 0 {
+        RelocationTarget::Absolute
+    } else {
+        RelocationTarget::Symbol(SymbolIndex(sym))
+    };
+    Relocation {
+        kind,
+        encoding,
+        size,
+        target,
+        addend: reloc.r_addend(endian).into(),
+        implicit_addend,
+    }
+}
+
+/// A trait for generic access to `Rel32` and `Rel64`.
+#[allow(missing_docs)]
+pub trait Rel: Debug + Pod + Clone {
+    type Word: Into<u64>;
+    type Sword: Into<i64>;
+    type Endian: endian::Endian;
+
+    fn r_offset(&self, endian: Self::Endian) -> Self::Word;
+    fn r_info(&self, endian: Self::Endian) -> Self::Word;
+    fn r_sym(&self, endian: Self::Endian) -> u32;
+    fn r_type(&self, endian: Self::Endian) -> u32;
+}
+
+impl<Endian: endian::Endian> Rel for elf::Rel32<Endian> {
+    type Word = u32;
+    type Sword = i32;
+    type Endian = Endian;
+
+    #[inline]
+    fn r_offset(&self, endian: Self::Endian) -> Self::Word {
+        self.r_offset.get(endian)
+    }
+
+    #[inline]
+    fn r_info(&self, endian: Self::Endian) -> Self::Word {
+        self.r_info.get(endian)
+    }
+
+    #[inline]
+    fn r_sym(&self, endian: Self::Endian) -> u32 {
+        self.r_sym(endian)
+    }
+
+    #[inline]
+    fn r_type(&self, endian: Self::Endian) -> u32 {
+        self.r_type(endian)
+    }
+}
+
+impl<Endian: endian::Endian> Rel for elf::Rel64<Endian> {
+    type Word = u64;
+    type Sword = i64;
+    type Endian = Endian;
+
+    #[inline]
+    fn r_offset(&self, endian: Self::Endian) -> Self::Word {
+        self.r_offset.get(endian)
+    }
+
+    #[inline]
+    fn r_info(&self, endian: Self::Endian) -> Self::Word {
+        self.r_info.get(endian)
+    }
+
+    #[inline]
+    fn r_sym(&self, endian: Self::Endian) -> u32 {
+        self.r_sym(endian)
+    }
+
+    #[inline]
+    fn r_type(&self, endian: Self::Endian) -> u32 {
+        self.r_type(endian)
+    }
+}
+
+/// A trait for generic access to `Rela32` and `Rela64`.
+#[allow(missing_docs)]
+pub trait Rela: Debug + Pod + Clone {
+    type Word: Into<u64>;
+    type Sword: Into<i64>;
+    type Endian: endian::Endian;
+
+    fn r_offset(&self, endian: Self::Endian) -> Self::Word;
+    fn r_info(&self, endian: Self::Endian, is_mips64el: bool) -> Self::Word;
+    fn r_addend(&self, endian: Self::Endian) -> Self::Sword;
+    fn r_sym(&self, endian: Self::Endian, is_mips64el: bool) -> u32;
+    fn r_type(&self, endian: Self::Endian, is_mips64el: bool) -> u32;
+}
+
+impl<Endian: endian::Endian> Rela for elf::Rela32<Endian> {
+    type Word = u32;
+    type Sword = i32;
+    type Endian = Endian;
+
+    #[inline]
+    fn r_offset(&self, endian: Self::Endian) -> Self::Word {
+        self.r_offset.get(endian)
+    }
+
+    #[inline]
+    fn r_info(&self, endian: Self::Endian, _is_mips64el: bool) -> Self::Word {
+        self.r_info.get(endian)
+    }
+
+    #[inline]
+    fn r_addend(&self, endian: Self::Endian) -> Self::Sword {
+        self.r_addend.get(endian)
+    }
+
+    #[inline]
+    fn r_sym(&self, endian: Self::Endian, _is_mips64el: bool) -> u32 {
+        self.r_sym(endian)
+    }
+
+    #[inline]
+    fn r_type(&self, endian: Self::Endian, _is_mips64el: bool) -> u32 {
+        self.r_type(endian)
+    }
+}
+
+impl<Endian: endian::Endian> Rela for elf::Rela64<Endian> {
+    type Word = u64;
+    type Sword = i64;
+    type Endian = Endian;
+
+    #[inline]
+    fn r_offset(&self, endian: Self::Endian) -> Self::Word {
+        self.r_offset.get(endian)
+    }
+
+    #[inline]
+    fn r_info(&self, endian: Self::Endian, is_mips64el: bool) -> Self::Word {
+        self.get_r_info(endian, is_mips64el)
+    }
+
+    #[inline]
+    fn r_addend(&self, endian: Self::Endian) -> Self::Sword {
+        self.r_addend.get(endian)
+    }
+
+    #[inline]
+    fn r_sym(&self, endian: Self::Endian, is_mips64el: bool) -> u32 {
+        self.r_sym(endian, is_mips64el)
+    }
+
+    #[inline]
+    fn r_type(&self, endian: Self::Endian, is_mips64el: bool) -> u32 {
+        self.r_type(endian, is_mips64el)
+    }
+}
diff --git a/third_party/rust/object/src/read/elf/section.rs b/third_party/rust/object/src/read/elf/section.rs
new file mode 100644
index 0000000000..3f8a082165
--- /dev/null
+++ b/third_party/rust/object/src/read/elf/section.rs
@@ -0,0 +1,1090 @@
+use core::fmt::Debug;
+use core::{iter, mem, slice, str};
+
+use crate::elf;
+use crate::endian::{self, Endianness, U32Bytes};
+use crate::pod::Pod;
+use crate::read::{
+    self, Bytes, CompressedData, CompressedFileRange, CompressionFormat, Error, ObjectSection,
+    ReadError, ReadRef, SectionFlags, SectionIndex, SectionKind, StringTable,
+};
+
+use super::{
+    CompressionHeader, ElfFile, ElfSectionRelocationIterator, FileHeader, GnuHashTable, HashTable,
+    NoteIterator, RelocationSections, SymbolTable, VerdefIterator, VerneedIterator, VersionTable,
+};
+
+/// The table of section headers in an ELF file.
+///
+/// Also includes the string table used for the section names.
+#[derive(Debug, Default, Clone, Copy)]
+pub struct SectionTable<'data, Elf: FileHeader, R = &'data [u8]>
+where
+    R: ReadRef<'data>,
+{
+    sections: &'data [Elf::SectionHeader],
+    strings: StringTable<'data, R>,
+}
+
+impl<'data, Elf: FileHeader, R: ReadRef<'data>> SectionTable<'data, Elf, R> {
+    /// Create a new section table.
+    #[inline]
+    pub fn new(sections: &'data [Elf::SectionHeader], strings: StringTable<'data, R>) -> Self {
+        SectionTable { sections, strings }
+    }
+
+    /// Iterate over the section headers.
+    #[inline]
+    pub fn iter(&self) -> slice::Iter<'data, Elf::SectionHeader> {
+        self.sections.iter()
+    }
+
+    /// Return true if the section table is empty.
+    #[inline]
+    pub fn is_empty(&self) -> bool {
+        self.sections.is_empty()
+    }
+
+    /// The number of section headers.
+    #[inline]
+    pub fn len(&self) -> usize {
+        self.sections.len()
+    }
+
+    /// Return the section header at the given index.
+    pub fn section(&self, index: SectionIndex) -> read::Result<&'data Elf::SectionHeader> {
+        self.sections
+            .get(index.0)
+            .read_error("Invalid ELF section index")
+    }
+
+    /// Return the section header with the given name.
+    ///
+    /// Ignores sections with invalid names.
+    pub fn section_by_name(
+        &self,
+        endian: Elf::Endian,
+        name: &[u8],
+    ) -> Option<(usize, &'data Elf::SectionHeader)> {
+        self.sections
+            .iter()
+            .enumerate()
+            .find(|(_, section)| self.section_name(endian, section) == Ok(name))
+    }
+
+    /// Return the section name for the given section header.
+    pub fn section_name(
+        &self,
+        endian: Elf::Endian,
+        section: &'data Elf::SectionHeader,
+    ) -> read::Result<&'data [u8]> {
+        section.name(endian, self.strings)
+    }
+
+    /// Return the string table at the given section index.
+    ///
+    /// Returns an error if the section is not a string table.
+    #[inline]
+    pub fn strings(
+        &self,
+        endian: Elf::Endian,
+        data: R,
+        index: SectionIndex,
+    ) -> read::Result<StringTable<'data, R>> {
+        self.section(index)?
+            .strings(endian, data)?
+            .read_error("Invalid ELF string section type")
+    }
+
+    /// Return the symbol table of the given section type.
+    ///
+    /// Returns an empty symbol table if the symbol table does not exist.
+    #[inline]
+    pub fn symbols(
+        &self,
+        endian: Elf::Endian,
+        data: R,
+        sh_type: u32,
+    ) -> read::Result<SymbolTable<'data, Elf, R>> {
+        debug_assert!(sh_type == elf::SHT_DYNSYM || sh_type == elf::SHT_SYMTAB);
+
+        let (index, section) = match self
+            .iter()
+            .enumerate()
+            .find(|s| s.1.sh_type(endian) == sh_type)
+        {
+            Some(s) => s,
+            None => return Ok(SymbolTable::default()),
+        };
+
+        SymbolTable::parse(endian, data, self, SectionIndex(index), section)
+    }
+
+    /// Return the symbol table at the given section index.
+    ///
+    /// Returns an error if the section is not a symbol table.
+    #[inline]
+    pub fn symbol_table_by_index(
+        &self,
+        endian: Elf::Endian,
+        data: R,
+        index: SectionIndex,
+    ) -> read::Result<SymbolTable<'data, Elf, R>> {
+        let section = self.section(index)?;
+        match section.sh_type(endian) {
+            elf::SHT_DYNSYM | elf::SHT_SYMTAB => {}
+            _ => return Err(Error("Invalid ELF symbol table section type")),
+        }
+        SymbolTable::parse(endian, data, self, index, section)
+    }
+
+    /// Create a mapping from section index to associated relocation sections.
+    #[inline]
+    pub fn relocation_sections(
+        &self,
+        endian: Elf::Endian,
+        symbol_section: SectionIndex,
+    ) -> read::Result<RelocationSections> {
+        RelocationSections::parse(endian, self, symbol_section)
+    }
+
+    /// Return the contents of a dynamic section.
+    ///
+    /// Also returns the linked string table index.
+    ///
+    /// Returns `Ok(None)` if there is no `SHT_DYNAMIC` section.
+    /// Returns `Err` for invalid values.
+    pub fn dynamic(
+        &self,
+        endian: Elf::Endian,
+        data: R,
+    ) -> read::Result<Option<(&'data [Elf::Dyn], SectionIndex)>> {
+        for section in self.sections {
+            if let Some(dynamic) = section.dynamic(endian, data)? {
+                return Ok(Some(dynamic));
+            }
+        }
+        Ok(None)
+    }
+
+    /// Return the header of a SysV hash section.
+    ///
+    /// Returns `Ok(None)` if there is no SysV GNU hash section.
+    /// Returns `Err` for invalid values.
+    pub fn hash_header(
+        &self,
+        endian: Elf::Endian,
+        data: R,
+    ) -> read::Result<Option<&'data elf::HashHeader<Elf::Endian>>> {
+        for section in self.sections {
+            if let Some(hash) = section.hash_header(endian, data)? {
+                return Ok(Some(hash));
+            }
+        }
+        Ok(None)
+    }
+
+    /// Return the contents of a SysV hash section.
+    ///
+    /// Also returns the linked symbol table index.
+    ///
+    /// Returns `Ok(None)` if there is no SysV hash section.
+    /// Returns `Err` for invalid values.
+    pub fn hash(
+        &self,
+        endian: Elf::Endian,
+        data: R,
+    ) -> read::Result<Option<(HashTable<'data, Elf>, SectionIndex)>> {
+        for section in self.sections {
+            if let Some(hash) = section.hash(endian, data)? {
+                return Ok(Some(hash));
+            }
+        }
+        Ok(None)
+    }
+
+    /// Return the header of a GNU hash section.
+    ///
+    /// Returns `Ok(None)` if there is no GNU hash section.
+    /// Returns `Err` for invalid values.
+    pub fn gnu_hash_header(
+        &self,
+        endian: Elf::Endian,
+        data: R,
+    ) -> read::Result<Option<&'data elf::GnuHashHeader<Elf::Endian>>> {
+        for section in self.sections {
+            if let Some(hash) = section.gnu_hash_header(endian, data)? {
+                return Ok(Some(hash));
+            }
+        }
+        Ok(None)
+    }
+
+    /// Return the contents of a GNU hash section.
+    ///
+    /// Also returns the linked symbol table index.
+    ///
+    /// Returns `Ok(None)` if there is no GNU hash section.
+    /// Returns `Err` for invalid values.
+    pub fn gnu_hash(
+        &self,
+        endian: Elf::Endian,
+        data: R,
+    ) -> read::Result<Option<(GnuHashTable<'data, Elf>, SectionIndex)>> {
+        for section in self.sections {
+            if let Some(hash) = section.gnu_hash(endian, data)? {
+                return Ok(Some(hash));
+            }
+        }
+        Ok(None)
+    }
+
+    /// Return the contents of a `SHT_GNU_VERSYM` section.
+    ///
+    /// Also returns the linked symbol table index.
+    ///
+    /// Returns `Ok(None)` if there is no `SHT_GNU_VERSYM` section.
+    /// Returns `Err` for invalid values.
+    pub fn gnu_versym(
+        &self,
+        endian: Elf::Endian,
+        data: R,
+    ) -> read::Result<Option<(&'data [elf::Versym<Elf::Endian>], SectionIndex)>> {
+        for section in self.sections {
+            if let Some(syms) = section.gnu_versym(endian, data)? {
+                return Ok(Some(syms));
+            }
+        }
+        Ok(None)
+    }
+
+    /// Return the contents of a `SHT_GNU_VERDEF` section.
+    ///
+    /// Also returns the linked string table index.
+    ///
+    /// Returns `Ok(None)` if there is no `SHT_GNU_VERDEF` section.
+    /// Returns `Err` for invalid values.
+    pub fn gnu_verdef(
+        &self,
+        endian: Elf::Endian,
+        data: R,
+    ) -> read::Result<Option<(VerdefIterator<'data, Elf>, SectionIndex)>> {
+        for section in self.sections {
+            if let Some(defs) = section.gnu_verdef(endian, data)? {
+                return Ok(Some(defs));
+            }
+        }
+        Ok(None)
+    }
+
+    /// Return the contents of a `SHT_GNU_VERNEED` section.
+    ///
+    /// Also returns the linked string table index.
+    ///
+    /// Returns `Ok(None)` if there is no `SHT_GNU_VERNEED` section.
+    /// Returns `Err` for invalid values.
+    pub fn gnu_verneed(
+        &self,
+        endian: Elf::Endian,
+        data: R,
+    ) -> read::Result<Option<(VerneedIterator<'data, Elf>, SectionIndex)>> {
+        for section in self.sections {
+            if let Some(needs) = section.gnu_verneed(endian, data)? {
+                return Ok(Some(needs));
+            }
+        }
+        Ok(None)
+    }
+
+    /// Returns the symbol version table.
+    ///
+    /// Returns `Ok(None)` if there is no `SHT_GNU_VERSYM` section.
+    /// Returns `Err` for invalid values.
+    pub fn versions(
+        &self,
+        endian: Elf::Endian,
+        data: R,
+    ) -> read::Result<Option<VersionTable<'data, Elf>>> {
+        let (versyms, link) = match self.gnu_versym(endian, data)? {
+            Some(val) => val,
+            None => return Ok(None),
+        };
+        let strings = self.symbol_table_by_index(endian, data, link)?.strings();
+        // TODO: check links?
+        let verdefs = self.gnu_verdef(endian, data)?.map(|x| x.0);
+        let verneeds = self.gnu_verneed(endian, data)?.map(|x| x.0);
+        VersionTable::parse(endian, versyms, verdefs, verneeds, strings).map(Some)
+    }
+}
+
+/// An iterator over the sections of an `ElfFile32`.
+pub type ElfSectionIterator32<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    ElfSectionIterator<'data, 'file, elf::FileHeader32<Endian>, R>;
+/// An iterator over the sections of an `ElfFile64`.
+pub type ElfSectionIterator64<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    ElfSectionIterator<'data, 'file, elf::FileHeader64<Endian>, R>;
+
+/// An iterator over the sections of an `ElfFile`.
+#[derive(Debug)]
+pub struct ElfSectionIterator<'data, 'file, Elf, R = &'data [u8]>
+where
+    Elf: FileHeader,
+    R: ReadRef<'data>,
+{
+    pub(super) file: &'file ElfFile<'data, Elf, R>,
+    pub(super) iter: iter::Enumerate<slice::Iter<'data, Elf::SectionHeader>>,
+}
+
+impl<'data, 'file, Elf, R> Iterator for ElfSectionIterator<'data, 'file, Elf, R>
+where
+    Elf: FileHeader,
+    R: ReadRef<'data>,
+{
+    type Item = ElfSection<'data, 'file, Elf, R>;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        self.iter.next().map(|(index, section)| ElfSection {
+            index: SectionIndex(index),
+            file: self.file,
+            section,
+        })
+    }
+}
+
+/// A section of an `ElfFile32`.
+pub type ElfSection32<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    ElfSection<'data, 'file, elf::FileHeader32<Endian>, R>;
+/// A section of an `ElfFile64`.
+pub type ElfSection64<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    ElfSection<'data, 'file, elf::FileHeader64<Endian>, R>;
+
+/// A section of an `ElfFile`.
+#[derive(Debug)]
+pub struct ElfSection<'data, 'file, Elf, R = &'data [u8]>
+where
+    'data: 'file,
+    Elf: FileHeader,
+    R: ReadRef<'data>,
+{
+    pub(super) file: &'file ElfFile<'data, Elf, R>,
+    pub(super) index: SectionIndex,
+    pub(super) section: &'data Elf::SectionHeader,
+}
+
+impl<'data, 'file, Elf: FileHeader, R: ReadRef<'data>> ElfSection<'data, 'file, Elf, R> {
+    fn bytes(&self) -> read::Result<&'data [u8]> {
+        self.section
+            .data(self.file.endian, self.file.data)
+            .read_error("Invalid ELF section size or offset")
+    }
+
+    fn maybe_compressed(&self) -> read::Result<Option<CompressedFileRange>> {
+        let endian = self.file.endian;
+        if (self.section.sh_flags(endian).into() & u64::from(elf::SHF_COMPRESSED)) == 0 {
+            return Ok(None);
+        }
+        let (section_offset, section_size) = self
+            .section
+            .file_range(endian)
+            .read_error("Invalid ELF compressed section type")?;
+        let mut offset = section_offset;
+        let header = self
+            .file
+            .data
+            .read::<Elf::CompressionHeader>(&mut offset)
+            .read_error("Invalid ELF compressed section offset")?;
+        if header.ch_type(endian) != elf::ELFCOMPRESS_ZLIB {
+            return Err(Error("Unsupported ELF compression type"));
+        }
+        let uncompressed_size = header.ch_size(endian).into();
+        let compressed_size = section_size
+            .checked_sub(offset - section_offset)
+            .read_error("Invalid ELF compressed section size")?;
+        Ok(Some(CompressedFileRange {
+            format: CompressionFormat::Zlib,
+            offset,
+            compressed_size,
+            uncompressed_size,
+        }))
+    }
+
+    /// Try GNU-style "ZLIB" header decompression.
+    fn maybe_compressed_gnu(&self) -> read::Result<Option<CompressedFileRange>> {
+        let name = match self.name() {
+            Ok(name) => name,
+            // I think it's ok to ignore this error?
+            Err(_) => return Ok(None),
+        };
+        if !name.starts_with(".zdebug_") {
+            return Ok(None);
+        }
+        let (section_offset, section_size) = self
+            .section
+            .file_range(self.file.endian)
+            .read_error("Invalid ELF GNU compressed section type")?;
+        let mut offset = section_offset;
+        let data = self.file.data;
+        // Assume ZLIB-style uncompressed data is no more than 4GB to avoid accidentally
+        // huge allocations. This also reduces the chance of accidentally matching on a
+        // .debug_str that happens to start with "ZLIB".
+        if data
+            .read_bytes(&mut offset, 8)
+            .read_error("ELF GNU compressed section is too short")?
+            != b"ZLIB\0\0\0\0"
+        {
+            return Err(Error("Invalid ELF GNU compressed section header"));
+        }
+        let uncompressed_size = data
+            .read::<U32Bytes<_>>(&mut offset)
+            .read_error("ELF GNU compressed section is too short")?
+            .get(endian::BigEndian)
+            .into();
+        let compressed_size = section_size
+            .checked_sub(offset - section_offset)
+            .read_error("ELF GNU compressed section is too short")?;
+        Ok(Some(CompressedFileRange {
+            format: CompressionFormat::Zlib,
+            offset,
+            compressed_size,
+            uncompressed_size,
+        }))
+    }
+}
+
+impl<'data, 'file, Elf, R> read::private::Sealed for ElfSection<'data, 'file, Elf, R>
+where
+    Elf: FileHeader,
+    R: ReadRef<'data>,
+{
+}
+
+impl<'data, 'file, Elf, R> ObjectSection<'data> for ElfSection<'data, 'file, Elf, R>
+where
+    Elf: FileHeader,
+    R: ReadRef<'data>,
+{
+    type RelocationIterator = ElfSectionRelocationIterator<'data, 'file, Elf, R>;
+
+    #[inline]
+    fn index(&self) -> SectionIndex {
+        self.index
+    }
+
+    #[inline]
+    fn address(&self) -> u64 {
+        self.section.sh_addr(self.file.endian).into()
+    }
+
+    #[inline]
+    fn size(&self) -> u64 {
+        self.section.sh_size(self.file.endian).into()
+    }
+
+    #[inline]
+    fn align(&self) -> u64 {
+        self.section.sh_addralign(self.file.endian).into()
+    }
+
+    #[inline]
+    fn file_range(&self) -> Option<(u64, u64)> {
+        self.section.file_range(self.file.endian)
+    }
+
+    #[inline]
+    fn data(&self) -> read::Result<&'data [u8]> {
+        self.bytes()
+    }
+
+    fn data_range(&self, address: u64, size: u64) -> read::Result<Option<&'data [u8]>> {
+        Ok(read::util::data_range(
+            self.bytes()?,
+            self.address(),
+            address,
+            size,
+        ))
+    }
+
+    fn compressed_file_range(&self) -> read::Result<CompressedFileRange> {
+        Ok(if let Some(data) = self.maybe_compressed()? {
+            data
+        } else if let Some(data) = self.maybe_compressed_gnu()? {
+            data
+        } else {
+            CompressedFileRange::none(self.file_range())
+        })
+    }
+
+    fn compressed_data(&self) -> read::Result<CompressedData<'data>> {
+        self.compressed_file_range()?.data(self.file.data)
+    }
+
+    fn name_bytes(&self) -> read::Result<&[u8]> {
+        self.file
+            .sections
+            .section_name(self.file.endian, self.section)
+    }
+
+    fn name(&self) -> read::Result<&str> {
+        let name = self.name_bytes()?;
+        str::from_utf8(name)
+            .ok()
+            .read_error("Non UTF-8 ELF section name")
+    }
+
+    #[inline]
+    fn segment_name_bytes(&self) -> read::Result<Option<&[u8]>> {
+        Ok(None)
+    }
+
+    #[inline]
+    fn segment_name(&self) -> read::Result<Option<&str>> {
+        Ok(None)
+    }
+
+    fn kind(&self) -> SectionKind {
+        let flags = self.section.sh_flags(self.file.endian).into();
+        let sh_type = self.section.sh_type(self.file.endian);
+        match sh_type {
+            elf::SHT_PROGBITS => {
+                if flags & u64::from(elf::SHF_ALLOC) != 0 {
+                    if flags & u64::from(elf::SHF_EXECINSTR) != 0 {
+                        SectionKind::Text
+                    } else if flags & u64::from(elf::SHF_TLS) != 0 {
+                        SectionKind::Tls
+                    } else if flags & u64::from(elf::SHF_WRITE) != 0 {
+                        SectionKind::Data
+                    } else if flags & u64::from(elf::SHF_STRINGS) != 0 {
+                        SectionKind::ReadOnlyString
+                    } else {
+                        SectionKind::ReadOnlyData
+                    }
+                } else if flags & u64::from(elf::SHF_STRINGS) != 0 {
+                    SectionKind::OtherString
+                } else {
+                    SectionKind::Other
+                }
+            }
+            elf::SHT_NOBITS => {
+                if flags & u64::from(elf::SHF_TLS) != 0 {
+                    SectionKind::UninitializedTls
+                } else {
+                    SectionKind::UninitializedData
+                }
+            }
+            elf::SHT_NOTE => SectionKind::Note,
+            elf::SHT_NULL
+            | elf::SHT_SYMTAB
+            | elf::SHT_STRTAB
+            | elf::SHT_RELA
+            | elf::SHT_HASH
+            | elf::SHT_DYNAMIC
+            | elf::SHT_REL
+            | elf::SHT_DYNSYM
+            | elf::SHT_GROUP => SectionKind::Metadata,
+            _ => SectionKind::Elf(sh_type),
+        }
+    }
+
+    fn relocations(&self) -> ElfSectionRelocationIterator<'data, 'file, Elf, R> {
+        ElfSectionRelocationIterator {
+            section_index: self.index,
+            file: self.file,
+            relocations: None,
+        }
+    }
+
+    fn flags(&self) -> SectionFlags {
+        SectionFlags::Elf {
+            sh_flags: self.section.sh_flags(self.file.endian).into(),
+        }
+    }
+}
+
+/// A trait for generic access to `SectionHeader32` and `SectionHeader64`.
+#[allow(missing_docs)]
+pub trait SectionHeader: Debug + Pod {
+    type Elf: FileHeader<SectionHeader = Self, Endian = Self::Endian, Word = Self::Word>;
+    type Word: Into<u64>;
+    type Endian: endian::Endian;
+
+    fn sh_name(&self, endian: Self::Endian) -> u32;
+    fn sh_type(&self, endian: Self::Endian) -> u32;
+    fn sh_flags(&self, endian: Self::Endian) -> Self::Word;
+    fn sh_addr(&self, endian: Self::Endian) -> Self::Word;
+    fn sh_offset(&self, endian: Self::Endian) -> Self::Word;
+    fn sh_size(&self, endian: Self::Endian) -> Self::Word;
+    fn sh_link(&self, endian: Self::Endian) -> u32;
+    fn sh_info(&self, endian: Self::Endian) -> u32;
+    fn sh_addralign(&self, endian: Self::Endian) -> Self::Word;
+    fn sh_entsize(&self, endian: Self::Endian) -> Self::Word;
+
+    /// Parse the section name from the string table.
+    fn name<'data, R: ReadRef<'data>>(
+        &self,
+        endian: Self::Endian,
+        strings: StringTable<'data, R>,
+    ) -> read::Result<&'data [u8]> {
+        strings
+            .get(self.sh_name(endian))
+            .read_error("Invalid ELF section name offset")
+    }
+
+    /// Return the offset and size of the section in the file.
+    ///
+    /// Returns `None` for sections that have no data in the file.
+    fn file_range(&self, endian: Self::Endian) -> Option<(u64, u64)> {
+        if self.sh_type(endian) == elf::SHT_NOBITS {
+            None
+        } else {
+            Some((self.sh_offset(endian).into(), self.sh_size(endian).into()))
+        }
+    }
+
+    /// Return the section data.
+    ///
+    /// Returns `Ok(&[])` if the section has no data.
+    /// Returns `Err` for invalid values.
+    fn data<'data, R: ReadRef<'data>>(
+        &self,
+        endian: Self::Endian,
+        data: R,
+    ) -> read::Result<&'data [u8]> {
+        if let Some((offset, size)) = self.file_range(endian) {
+            data.read_bytes_at(offset, size)
+                .read_error("Invalid ELF section size or offset")
+        } else {
+            Ok(&[])
+        }
+    }
+
+    /// Return the section data as a slice of the given type.
+    ///
+    /// Allows padding at the end of the data.
+    /// Returns `Ok(&[])` if the section has no data.
+    /// Returns `Err` for invalid values, including bad alignment.
+    fn data_as_array<'data, T: Pod, R: ReadRef<'data>>(
+        &self,
+        endian: Self::Endian,
+        data: R,
+    ) -> read::Result<&'data [T]> {
+        let mut data = self.data(endian, data).map(Bytes)?;
+        data.read_slice(data.len() / mem::size_of::<T>())
+            .read_error("Invalid ELF section size or offset")
+    }
+
+    /// Return the strings in the section.
+    ///
+    /// Returns `Ok(None)` if the section does not contain strings.
+    /// Returns `Err` for invalid values.
+    fn strings<'data, R: ReadRef<'data>>(
+        &self,
+        endian: Self::Endian,
+        data: R,
+    ) -> read::Result<Option<StringTable<'data, R>>> {
+        if self.sh_type(endian) != elf::SHT_STRTAB {
+            return Ok(None);
+        }
+        let str_offset = self.sh_offset(endian).into();
+        let str_size = self.sh_size(endian).into();
+        let str_end = str_offset
+            .checked_add(str_size)
+            .read_error("Invalid ELF string section offset or size")?;
+        Ok(Some(StringTable::new(data, str_offset, str_end)))
+    }
+
+    /// Return the symbols in the section.
+    ///
+    /// Also finds the linked string table in `sections`.
+    ///
+    /// `section_index` must be the 0-based index of this section, and is used
+    /// to find the corresponding extended section index table in `sections`.
+    ///
+    /// Returns `Ok(None)` if the section does not contain symbols.
+    /// Returns `Err` for invalid values.
+    fn symbols<'data, R: ReadRef<'data>>(
+        &self,
+        endian: Self::Endian,
+        data: R,
+        sections: &SectionTable<'data, Self::Elf, R>,
+        section_index: SectionIndex,
+    ) -> read::Result<Option<SymbolTable<'data, Self::Elf, R>>> {
+        let sh_type = self.sh_type(endian);
+        if sh_type != elf::SHT_SYMTAB && sh_type != elf::SHT_DYNSYM {
+            return Ok(None);
+        }
+        SymbolTable::parse(endian, data, sections, section_index, self).map(Some)
+    }
+
+    /// Return the `Elf::Rel` entries in the section.
+    ///
+    /// Also returns the linked symbol table index.
+    ///
+    /// Returns `Ok(None)` if the section does not contain relocations.
+    /// Returns `Err` for invalid values.
+    fn rel<'data, R: ReadRef<'data>>(
+        &self,
+        endian: Self::Endian,
+        data: R,
+    ) -> read::Result<Option<(&'data [<Self::Elf as FileHeader>::Rel], SectionIndex)>> {
+        if self.sh_type(endian) != elf::SHT_REL {
+            return Ok(None);
+        }
+        let rel = self
+            .data_as_array(endian, data)
+            .read_error("Invalid ELF relocation section offset or size")?;
+        let link = SectionIndex(self.sh_link(endian) as usize);
+        Ok(Some((rel, link)))
+    }
+
+    /// Return the `Elf::Rela` entries in the section.
+    ///
+    /// Also returns the linked symbol table index.
+    ///
+    /// Returns `Ok(None)` if the section does not contain relocations.
+    /// Returns `Err` for invalid values.
+    fn rela<'data, R: ReadRef<'data>>(
+        &self,
+        endian: Self::Endian,
+        data: R,
+    ) -> read::Result<Option<(&'data [<Self::Elf as FileHeader>::Rela], SectionIndex)>> {
+        if self.sh_type(endian) != elf::SHT_RELA {
+            return Ok(None);
+        }
+        let rela = self
+            .data_as_array(endian, data)
+            .read_error("Invalid ELF relocation section offset or size")?;
+        let link = SectionIndex(self.sh_link(endian) as usize);
+        Ok(Some((rela, link)))
+    }
+
+    /// Return entries in a dynamic section.
+    ///
+    /// Also returns the linked string table index.
+    ///
+    /// Returns `Ok(None)` if the section type is not `SHT_DYNAMIC`.
+    /// Returns `Err` for invalid values.
+    fn dynamic<'data, R: ReadRef<'data>>(
+        &self,
+        endian: Self::Endian,
+        data: R,
+    ) -> read::Result<Option<(&'data [<Self::Elf as FileHeader>::Dyn], SectionIndex)>> {
+        if self.sh_type(endian) != elf::SHT_DYNAMIC {
+            return Ok(None);
+        }
+        let dynamic = self
+            .data_as_array(endian, data)
+            .read_error("Invalid ELF dynamic section offset or size")?;
+        let link = SectionIndex(self.sh_link(endian) as usize);
+        Ok(Some((dynamic, link)))
+    }
+
+    /// Return a note iterator for the section data.
+    ///
+    /// Returns `Ok(None)` if the section does not contain notes.
+    /// Returns `Err` for invalid values.
+    fn notes<'data, R: ReadRef<'data>>(
+        &self,
+        endian: Self::Endian,
+        data: R,
+    ) -> read::Result<Option<NoteIterator<'data, Self::Elf>>> {
+        if self.sh_type(endian) != elf::SHT_NOTE {
+            return Ok(None);
+        }
+        let data = self
+            .data(endian, data)
+            .read_error("Invalid ELF note section offset or size")?;
+        let notes = NoteIterator::new(endian, self.sh_addralign(endian), data)?;
+        Ok(Some(notes))
+    }
+
+    /// Return the contents of a group section.
+    ///
+    /// The first value is a `GRP_*` value, and the remaining values
+    /// are section indices.
+    ///
+    /// Returns `Ok(None)` if the section does not define a group.
+    /// Returns `Err` for invalid values.
+    fn group<'data, R: ReadRef<'data>>(
+        &self,
+        endian: Self::Endian,
+        data: R,
+    ) -> read::Result<Option<(u32, &'data [U32Bytes<Self::Endian>])>> {
+        if self.sh_type(endian) != elf::SHT_GROUP {
+            return Ok(None);
+        }
+        let mut data = self
+            .data(endian, data)
+            .read_error("Invalid ELF group section offset or size")
+            .map(Bytes)?;
+        let flag = data
+            .read::<U32Bytes<_>>()
+            .read_error("Invalid ELF group section offset or size")?
+            .get(endian);
+        let count = data.len() / mem::size_of::<U32Bytes<Self::Endian>>();
+        let sections = data
+            .read_slice(count)
+            .read_error("Invalid ELF group section offset or size")?;
+        Ok(Some((flag, sections)))
+    }
+
+    /// Return the header of a SysV hash section.
+    ///
+    /// Returns `Ok(None)` if the section does not contain a SysV hash.
+    /// Returns `Err` for invalid values.
+    fn hash_header<'data, R: ReadRef<'data>>(
+        &self,
+        endian: Self::Endian,
+        data: R,
+    ) -> read::Result<Option<&'data elf::HashHeader<Self::Endian>>> {
+        if self.sh_type(endian) != elf::SHT_HASH {
+            return Ok(None);
+        }
+        let data = self
+            .data(endian, data)
+            .read_error("Invalid ELF hash section offset or size")?;
+        let header = data
+            .read_at::<elf::HashHeader<Self::Endian>>(0)
+            .read_error("Invalid hash header")?;
+        Ok(Some(header))
+    }
+
+    /// Return the contents of a SysV hash section.
+    ///
+    /// Also returns the linked symbol table index.
+    ///
+    /// Returns `Ok(None)` if the section does not contain a SysV hash.
+    /// Returns `Err` for invalid values.
+    fn hash<'data, R: ReadRef<'data>>(
+        &self,
+        endian: Self::Endian,
+        data: R,
+    ) -> read::Result<Option<(HashTable<'data, Self::Elf>, SectionIndex)>> {
+        if self.sh_type(endian) != elf::SHT_HASH {
+            return Ok(None);
+        }
+        let data = self
+            .data(endian, data)
+            .read_error("Invalid ELF hash section offset or size")?;
+        let hash = HashTable::parse(endian, data)?;
+        let link = SectionIndex(self.sh_link(endian) as usize);
+        Ok(Some((hash, link)))
+    }
+
+    /// Return the header of a GNU hash section.
+    ///
+    /// Returns `Ok(None)` if the section does not contain a GNU hash.
+    /// Returns `Err` for invalid values.
+    fn gnu_hash_header<'data, R: ReadRef<'data>>(
+        &self,
+        endian: Self::Endian,
+        data: R,
+    ) -> read::Result<Option<&'data elf::GnuHashHeader<Self::Endian>>> {
+        if self.sh_type(endian) != elf::SHT_GNU_HASH {
+            return Ok(None);
+        }
+        let data = self
+            .data(endian, data)
+            .read_error("Invalid ELF GNU hash section offset or size")?;
+        let header = data
+            .read_at::<elf::GnuHashHeader<Self::Endian>>(0)
+            .read_error("Invalid GNU hash header")?;
+        Ok(Some(header))
+    }
+
+    /// Return the contents of a GNU hash section.
+    ///
+    /// Also returns the linked symbol table index.
+    ///
+    /// Returns `Ok(None)` if the section does not contain a GNU hash.
+    /// Returns `Err` for invalid values.
+    fn gnu_hash<'data, R: ReadRef<'data>>(
+        &self,
+        endian: Self::Endian,
+        data: R,
+    ) -> read::Result<Option<(GnuHashTable<'data, Self::Elf>, SectionIndex)>> {
+        if self.sh_type(endian) != elf::SHT_GNU_HASH {
+            return Ok(None);
+        }
+        let data = self
+            .data(endian, data)
+            .read_error("Invalid ELF GNU hash section offset or size")?;
+        let hash = GnuHashTable::parse(endian, data)?;
+        let link = SectionIndex(self.sh_link(endian) as usize);
+        Ok(Some((hash, link)))
+    }
+
+    /// Return the contents of a `SHT_GNU_VERSYM` section.
+    ///
+    /// Also returns the linked symbol table index.
+    ///
+    /// Returns `Ok(None)` if the section type is not `SHT_GNU_VERSYM`.
+    /// Returns `Err` for invalid values.
+    fn gnu_versym<'data, R: ReadRef<'data>>(
+        &self,
+        endian: Self::Endian,
+        data: R,
+    ) -> read::Result<Option<(&'data [elf::Versym<Self::Endian>], SectionIndex)>> {
+        if self.sh_type(endian) != elf::SHT_GNU_VERSYM {
+            return Ok(None);
+        }
+        let versym = self
+            .data_as_array(endian, data)
+            .read_error("Invalid ELF GNU versym section offset or size")?;
+        let link = SectionIndex(self.sh_link(endian) as usize);
+        Ok(Some((versym, link)))
+    }
+
+    /// Return an iterator for the entries of a `SHT_GNU_VERDEF` section.
+    ///
+    /// Also returns the linked string table index.
+    ///
+    /// Returns `Ok(None)` if the section type is not `SHT_GNU_VERDEF`.
+    /// Returns `Err` for invalid values.
+    fn gnu_verdef<'data, R: ReadRef<'data>>(
+        &self,
+        endian: Self::Endian,
+        data: R,
+    ) -> read::Result<Option<(VerdefIterator<'data, Self::Elf>, SectionIndex)>> {
+        if self.sh_type(endian) != elf::SHT_GNU_VERDEF {
+            return Ok(None);
+        }
+        let verdef = self
+            .data(endian, data)
+            .read_error("Invalid ELF GNU verdef section offset or size")?;
+        let link = SectionIndex(self.sh_link(endian) as usize);
+        Ok(Some((VerdefIterator::new(endian, verdef), link)))
+    }
+
+    /// Return an iterator for the entries of a `SHT_GNU_VERNEED` section.
+    ///
+    /// Also returns the linked string table index.
+    ///
+    /// Returns `Ok(None)` if the section type is not `SHT_GNU_VERNEED`.
+    /// Returns `Err` for invalid values.
+    fn gnu_verneed<'data, R: ReadRef<'data>>(
+        &self,
+        endian: Self::Endian,
+        data: R,
+    ) -> read::Result<Option<(VerneedIterator<'data, Self::Elf>, SectionIndex)>> {
+        if self.sh_type(endian) != elf::SHT_GNU_VERNEED {
+            return Ok(None);
+        }
+        let verneed = self
+            .data(endian, data)
+            .read_error("Invalid ELF GNU verneed section offset or size")?;
+        let link = SectionIndex(self.sh_link(endian) as usize);
+        Ok(Some((VerneedIterator::new(endian, verneed), link)))
+    }
+}
+
+impl<Endian: endian::Endian> SectionHeader for elf::SectionHeader32<Endian> {
+    type Elf = elf::FileHeader32<Endian>;
+    type Word = u32;
+    type Endian = Endian;
+
+    #[inline]
+    fn sh_name(&self, endian: Self::Endian) -> u32 {
+        self.sh_name.get(endian)
+    }
+
+    #[inline]
+    fn sh_type(&self, endian: Self::Endian) -> u32 {
+        self.sh_type.get(endian)
+    }
+
+    #[inline]
+    fn sh_flags(&self, endian: Self::Endian) -> Self::Word {
+        self.sh_flags.get(endian)
+    }
+
+    #[inline]
+    fn sh_addr(&self, endian: Self::Endian) -> Self::Word {
+        self.sh_addr.get(endian)
+    }
+
+    #[inline]
+    fn sh_offset(&self, endian: Self::Endian) -> Self::Word {
+        self.sh_offset.get(endian)
+    }
+
+    #[inline]
+    fn sh_size(&self, endian: Self::Endian) -> Self::Word {
+        self.sh_size.get(endian)
+    }
+
+    #[inline]
+    fn sh_link(&self, endian: Self::Endian) -> u32 {
+        self.sh_link.get(endian)
+    }
+
+    #[inline]
+    fn sh_info(&self, endian: Self::Endian) -> u32 {
+        self.sh_info.get(endian)
+    }
+
+    #[inline]
+    fn sh_addralign(&self, endian: Self::Endian) -> Self::Word {
+        self.sh_addralign.get(endian)
+    }
+
+    #[inline]
+    fn sh_entsize(&self, endian: Self::Endian) -> Self::Word {
+        self.sh_entsize.get(endian)
+    }
+}
+
+impl<Endian: endian::Endian> SectionHeader for elf::SectionHeader64<Endian> {
+    type Word = u64;
+    type Endian = Endian;
+    type Elf = elf::FileHeader64<Endian>;
+
+    #[inline]
+    fn sh_name(&self, endian: Self::Endian) -> u32 {
+        self.sh_name.get(endian)
+    }
+
+    #[inline]
+    fn sh_type(&self, endian: Self::Endian) -> u32 {
+        self.sh_type.get(endian)
+    }
+
+    #[inline]
+    fn sh_flags(&self, endian: Self::Endian) -> Self::Word {
+        self.sh_flags.get(endian)
+    }
+
+    #[inline]
+    fn sh_addr(&self, endian: Self::Endian) -> Self::Word {
+        self.sh_addr.get(endian)
+    }
+
+    #[inline]
+    fn sh_offset(&self, endian: Self::Endian) -> Self::Word {
+        self.sh_offset.get(endian)
+    }
+
+    #[inline]
+    fn sh_size(&self, endian: Self::Endian) -> Self::Word {
+        self.sh_size.get(endian)
+    }
+
+    #[inline]
+    fn sh_link(&self, endian: Self::Endian) -> u32 {
+        self.sh_link.get(endian)
+    }
+
+    #[inline]
+    fn sh_info(&self, endian: Self::Endian) -> u32 {
+        self.sh_info.get(endian)
+    }
+
+    #[inline]
+    fn sh_addralign(&self, endian: Self::Endian) -> Self::Word {
+        self.sh_addralign.get(endian)
+    }
+
+    #[inline]
+    fn sh_entsize(&self, endian: Self::Endian) -> Self::Word {
+        self.sh_entsize.get(endian)
+    }
+}
diff --git a/third_party/rust/object/src/read/elf/segment.rs b/third_party/rust/object/src/read/elf/segment.rs
new file mode 100644
index 0000000000..445893c8d1
--- /dev/null
+++ b/third_party/rust/object/src/read/elf/segment.rs
@@ -0,0 +1,333 @@
+use core::fmt::Debug;
+use core::{mem, slice, str};
+
+use crate::elf;
+use crate::endian::{self, Endianness};
+use crate::pod::Pod;
+use crate::read::{self, Bytes, ObjectSegment, ReadError, ReadRef, SegmentFlags};
+
+use super::{ElfFile, FileHeader, NoteIterator};
+
+/// An iterator over the segments of an `ElfFile32`.
+pub type ElfSegmentIterator32<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    ElfSegmentIterator<'data, 'file, elf::FileHeader32<Endian>, R>;
+/// An iterator over the segments of an `ElfFile64`.
+pub type ElfSegmentIterator64<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    ElfSegmentIterator<'data, 'file, elf::FileHeader64<Endian>, R>;
+
+/// An iterator over the segments of an `ElfFile`.
+#[derive(Debug)]
+pub struct ElfSegmentIterator<'data, 'file, Elf, R = &'data [u8]>
+where
+    Elf: FileHeader,
+    R: ReadRef<'data>,
+{
+    pub(super) file: &'file ElfFile<'data, Elf, R>,
+    pub(super) iter: slice::Iter<'data, Elf::ProgramHeader>,
+}
+
+impl<'data, 'file, Elf, R> Iterator for ElfSegmentIterator<'data, 'file, Elf, R>
+where
+    Elf: FileHeader,
+    R: ReadRef<'data>,
+{
+    type Item = ElfSegment<'data, 'file, Elf, R>;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        for segment in self.iter.by_ref() {
+            if segment.p_type(self.file.endian) == elf::PT_LOAD {
+                return Some(ElfSegment {
+                    file: self.file,
+                    segment,
+                });
+            }
+        }
+        None
+    }
+}
+
+/// A segment of an `ElfFile32`.
+pub type ElfSegment32<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    ElfSegment<'data, 'file, elf::FileHeader32<Endian>, R>;
+/// A segment of an `ElfFile64`.
+pub type ElfSegment64<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    ElfSegment<'data, 'file, elf::FileHeader64<Endian>, R>;
+
+/// A segment of an `ElfFile`.
+#[derive(Debug)]
+pub struct ElfSegment<'data, 'file, Elf, R = &'data [u8]>
+where
+    'data: 'file,
+    Elf: FileHeader,
+    R: ReadRef<'data>,
+{
+    pub(super) file: &'file ElfFile<'data, Elf, R>,
+    pub(super) segment: &'data Elf::ProgramHeader,
+}
+
+impl<'data, 'file, Elf: FileHeader, R: ReadRef<'data>> ElfSegment<'data, 'file, Elf, R> {
+    fn bytes(&self) -> read::Result<&'data [u8]> {
+        self.segment
+            .data(self.file.endian, self.file.data)
+            .read_error("Invalid ELF segment size or offset")
+    }
+}
+
+impl<'data, 'file, Elf, R> read::private::Sealed for ElfSegment<'data, 'file, Elf, R>
+where
+    Elf: FileHeader,
+    R: ReadRef<'data>,
+{
+}
+
+impl<'data, 'file, Elf, R> ObjectSegment<'data> for ElfSegment<'data, 'file, Elf, R>
+where
+    Elf: FileHeader,
+    R: ReadRef<'data>,
+{
+    #[inline]
+    fn address(&self) -> u64 {
+        self.segment.p_vaddr(self.file.endian).into()
+    }
+
+    #[inline]
+    fn size(&self) -> u64 {
+        self.segment.p_memsz(self.file.endian).into()
+    }
+
+    #[inline]
+    fn align(&self) -> u64 {
+        self.segment.p_align(self.file.endian).into()
+    }
+
+    #[inline]
+    fn file_range(&self) -> (u64, u64) {
+        self.segment.file_range(self.file.endian)
+    }
+
+    #[inline]
+    fn data(&self) -> read::Result<&'data [u8]> {
+        self.bytes()
+    }
+
+    fn data_range(&self, address: u64, size: u64) -> read::Result<Option<&'data [u8]>> {
+        Ok(read::util::data_range(
+            self.bytes()?,
+            self.address(),
+            address,
+            size,
+        ))
+    }
+
+    #[inline]
+    fn name_bytes(&self) -> read::Result<Option<&[u8]>> {
+        Ok(None)
+    }
+
+    #[inline]
+    fn name(&self) -> read::Result<Option<&str>> {
+        Ok(None)
+    }
+
+    #[inline]
+    fn flags(&self) -> SegmentFlags {
+        let p_flags = self.segment.p_flags(self.file.endian);
+        SegmentFlags::Elf { p_flags }
+    }
+}
+
+/// A trait for generic access to `ProgramHeader32` and `ProgramHeader64`.
+#[allow(missing_docs)]
+pub trait ProgramHeader: Debug + Pod {
+    type Elf: FileHeader<ProgramHeader = Self, Endian = Self::Endian, Word = Self::Word>;
+    type Word: Into<u64>;
+    type Endian: endian::Endian;
+
+    fn p_type(&self, endian: Self::Endian) -> u32;
+    fn p_flags(&self, endian: Self::Endian) -> u32;
+    fn p_offset(&self, endian: Self::Endian) -> Self::Word;
+    fn p_vaddr(&self, endian: Self::Endian) -> Self::Word;
+    fn p_paddr(&self, endian: Self::Endian) -> Self::Word;
+    fn p_filesz(&self, endian: Self::Endian) -> Self::Word;
+    fn p_memsz(&self, endian: Self::Endian) -> Self::Word;
+    fn p_align(&self, endian: Self::Endian) -> Self::Word;
+
+    /// Return the offset and size of the segment in the file.
+    fn file_range(&self, endian: Self::Endian) -> (u64, u64) {
+        (self.p_offset(endian).into(), self.p_filesz(endian).into())
+    }
+
+    /// Return the segment data.
+    ///
+    /// Returns `Err` for invalid values.
+    fn data<'data, R: ReadRef<'data>>(
+        &self,
+        endian: Self::Endian,
+        data: R,
+    ) -> Result<&'data [u8], ()> {
+        let (offset, size) = self.file_range(endian);
+        data.read_bytes_at(offset, size)
+    }
+
+    /// Return the segment data as a slice of the given type.
+    ///
+    /// Allows padding at the end of the data.
+    /// Returns `Ok(&[])` if the segment has no data.
+    /// Returns `Err` for invalid values, including bad alignment.
+    fn data_as_array<'data, T: Pod, R: ReadRef<'data>>(
+        &self,
+        endian: Self::Endian,
+        data: R,
+    ) -> Result<&'data [T], ()> {
+        let mut data = self.data(endian, data).map(Bytes)?;
+        data.read_slice(data.len() / mem::size_of::<T>())
+    }
+
+    /// Return the segment data in the given virtual address range
+    ///
+    /// Returns `Ok(None)` if the segment does not contain the address.
+    /// Returns `Err` for invalid values.
+    fn data_range<'data, R: ReadRef<'data>>(
+        &self,
+        endian: Self::Endian,
+        data: R,
+        address: u64,
+        size: u64,
+    ) -> Result<Option<&'data [u8]>, ()> {
+        Ok(read::util::data_range(
+            self.data(endian, data)?,
+            self.p_vaddr(endian).into(),
+            address,
+            size,
+        ))
+    }
+
+    /// Return entries in a dynamic segment.
+    ///
+    /// Returns `Ok(None)` if the segment is not `PT_DYNAMIC`.
+    /// Returns `Err` for invalid values.
+    fn dynamic<'data, R: ReadRef<'data>>(
+        &self,
+        endian: Self::Endian,
+        data: R,
+    ) -> read::Result<Option<&'data [<Self::Elf as FileHeader>::Dyn]>> {
+        if self.p_type(endian) != elf::PT_DYNAMIC {
+            return Ok(None);
+        }
+        let dynamic = self
+            .data_as_array(endian, data)
+            .read_error("Invalid ELF dynamic segment offset or size")?;
+        Ok(Some(dynamic))
+    }
+
+    /// Return a note iterator for the segment data.
+    ///
+    /// Returns `Ok(None)` if the segment does not contain notes.
+    /// Returns `Err` for invalid values.
+    fn notes<'data, R: ReadRef<'data>>(
+        &self,
+        endian: Self::Endian,
+        data: R,
+    ) -> read::Result<Option<NoteIterator<'data, Self::Elf>>> {
+        if self.p_type(endian) != elf::PT_NOTE {
+            return Ok(None);
+        }
+        let data = self
+            .data(endian, data)
+            .read_error("Invalid ELF note segment offset or size")?;
+        let notes = NoteIterator::new(endian, self.p_align(endian), data)?;
+        Ok(Some(notes))
+    }
+}
+
+impl<Endian: endian::Endian> ProgramHeader for elf::ProgramHeader32<Endian> {
+    type Word = u32;
+    type Endian = Endian;
+    type Elf = elf::FileHeader32<Endian>;
+
+    #[inline]
+    fn p_type(&self, endian: Self::Endian) -> u32 {
+        self.p_type.get(endian)
+    }
+
+    #[inline]
+    fn p_flags(&self, endian: Self::Endian) -> u32 {
+        self.p_flags.get(endian)
+    }
+
+    #[inline]
+    fn p_offset(&self, endian: Self::Endian) -> Self::Word {
+        self.p_offset.get(endian)
+    }
+
+    #[inline]
+    fn p_vaddr(&self, endian: Self::Endian) -> Self::Word {
+        self.p_vaddr.get(endian)
+    }
+
+    #[inline]
+    fn p_paddr(&self, endian: Self::Endian) -> Self::Word {
+        self.p_paddr.get(endian)
+    }
+
+    #[inline]
+    fn p_filesz(&self, endian: Self::Endian) -> Self::Word {
+        self.p_filesz.get(endian)
+    }
+
+    #[inline]
+    fn p_memsz(&self, endian: Self::Endian) -> Self::Word {
+        self.p_memsz.get(endian)
+    }
+
+    #[inline]
+    fn p_align(&self, endian: Self::Endian) -> Self::Word {
+        self.p_align.get(endian)
+    }
+}
+
+impl<Endian: endian::Endian> ProgramHeader for elf::ProgramHeader64<Endian> {
+    type Word = u64;
+    type Endian = Endian;
+    type Elf = elf::FileHeader64<Endian>;
+
+    #[inline]
+    fn p_type(&self, endian: Self::Endian) -> u32 {
+        self.p_type.get(endian)
+    }
+
+    #[inline]
+    fn p_flags(&self, endian: Self::Endian) -> u32 {
+        self.p_flags.get(endian)
+    }
+
+    #[inline]
+    fn p_offset(&self, endian: Self::Endian) -> Self::Word {
+        self.p_offset.get(endian)
+    }
+
+    #[inline]
+    fn p_vaddr(&self, endian: Self::Endian) -> Self::Word {
+        self.p_vaddr.get(endian)
+    }
+
+    #[inline]
+    fn p_paddr(&self, endian: Self::Endian) -> Self::Word {
+        self.p_paddr.get(endian)
+    }
+
+    #[inline]
+    fn p_filesz(&self, endian: Self::Endian) -> Self::Word {
+        self.p_filesz.get(endian)
+    }
+
+    #[inline]
+    fn p_memsz(&self, endian: Self::Endian) -> Self::Word {
+        self.p_memsz.get(endian)
+    }
+
+    #[inline]
+    fn p_align(&self, endian: Self::Endian) -> Self::Word {
+        self.p_align.get(endian)
+    }
+}
diff --git a/third_party/rust/object/src/read/elf/symbol.rs b/third_party/rust/object/src/read/elf/symbol.rs
new file mode 100644
index 0000000000..5d8d29f276
--- /dev/null
+++ b/third_party/rust/object/src/read/elf/symbol.rs
@@ -0,0 +1,580 @@
+use alloc::fmt;
+use alloc::vec::Vec;
+use core::fmt::Debug;
+use core::slice;
+use core::str;
+
+use crate::endian::{self, Endianness};
+use crate::pod::Pod;
+use crate::read::util::StringTable;
+use crate::read::{
+    self, ObjectSymbol, ObjectSymbolTable, ReadError, ReadRef, SectionIndex, SymbolFlags,
+    SymbolIndex, SymbolKind, SymbolMap, SymbolMapEntry, SymbolScope, SymbolSection,
+};
+use crate::{elf, U32};
+
+use super::{FileHeader, SectionHeader, SectionTable};
+
+/// A table of symbol entries in an ELF file.
+///
+/// Also includes the string table used for the symbol names.
+#[derive(Debug, Clone, Copy)]
+pub struct SymbolTable<'data, Elf: FileHeader, R = &'data [u8]>
+where
+    R: ReadRef<'data>,
+{
+    section: SectionIndex,
+    string_section: SectionIndex,
+    shndx_section: SectionIndex,
+    symbols: &'data [Elf::Sym],
+    strings: StringTable<'data, R>,
+    shndx: &'data [U32<Elf::Endian>],
+}
+
+impl<'data, Elf: FileHeader, R: ReadRef<'data>> Default for SymbolTable<'data, Elf, R> {
+    fn default() -> Self {
+        SymbolTable {
+            section: SectionIndex(0),
+            string_section: SectionIndex(0),
+            shndx_section: SectionIndex(0),
+            symbols: &[],
+            strings: Default::default(),
+            shndx: &[],
+        }
+    }
+}
+
+impl<'data, Elf: FileHeader, R: ReadRef<'data>> SymbolTable<'data, Elf, R> {
+    /// Parse the given symbol table section.
+    pub fn parse(
+        endian: Elf::Endian,
+        data: R,
+        sections: &SectionTable<'data, Elf, R>,
+        section_index: SectionIndex,
+        section: &Elf::SectionHeader,
+    ) -> read::Result<SymbolTable<'data, Elf, R>> {
+        debug_assert!(
+            section.sh_type(endian) == elf::SHT_DYNSYM
+                || section.sh_type(endian) == elf::SHT_SYMTAB
+        );
+
+        let symbols = section
+            .data_as_array(endian, data)
+            .read_error("Invalid ELF symbol table data")?;
+
+        let link = SectionIndex(section.sh_link(endian) as usize);
+        let strings = sections.strings(endian, data, link)?;
+
+        let mut shndx_section = SectionIndex(0);
+        let mut shndx = &[][..];
+        for (i, s) in sections.iter().enumerate() {
+            if s.sh_type(endian) == elf::SHT_SYMTAB_SHNDX
+                && s.sh_link(endian) as usize == section_index.0
+            {
+                shndx_section = SectionIndex(i);
+                shndx = s
+                    .data_as_array(endian, data)
+                    .read_error("Invalid ELF symtab_shndx data")?;
+            }
+        }
+
+        Ok(SymbolTable {
+            section: section_index,
+            string_section: link,
+            symbols,
+            strings,
+            shndx,
+            shndx_section,
+        })
+    }
+
+    /// Return the section index of this symbol table.
+    #[inline]
+    pub fn section(&self) -> SectionIndex {
+        self.section
+    }
+
+    /// Return the section index of the shndx table.
+    #[inline]
+    pub fn shndx_section(&self) -> SectionIndex {
+        self.shndx_section
+    }
+
+    /// Return the section index of the linked string table.
+    #[inline]
+    pub fn string_section(&self) -> SectionIndex {
+        self.string_section
+    }
+
+    /// Return the string table used for the symbol names.
+    #[inline]
+    pub fn strings(&self) -> StringTable<'data, R> {
+        self.strings
+    }
+
+    /// Return the symbol table.
+    #[inline]
+    pub fn symbols(&self) -> &'data [Elf::Sym] {
+        self.symbols
+    }
+
+    /// Iterate over the symbols.
+    #[inline]
+    pub fn iter(&self) -> slice::Iter<'data, Elf::Sym> {
+        self.symbols.iter()
+    }
+
+    /// Return true if the symbol table is empty.
+    #[inline]
+    pub fn is_empty(&self) -> bool {
+        self.symbols.is_empty()
+    }
+
+    /// The number of symbols.
+    #[inline]
+    pub fn len(&self) -> usize {
+        self.symbols.len()
+    }
+
+    /// Return the symbol at the given index.
+    pub fn symbol(&self, index: usize) -> read::Result<&'data Elf::Sym> {
+        self.symbols
+            .get(index)
+            .read_error("Invalid ELF symbol index")
+    }
+
+    /// Return the extended section index for the given symbol if present.
+    #[inline]
+    pub fn shndx(&self, endian: Elf::Endian, index: usize) -> Option<u32> {
+        self.shndx.get(index).map(|x| x.get(endian))
+    }
+
+    /// Return the section index for the given symbol.
+    ///
+    /// This uses the extended section index if present.
+    pub fn symbol_section(
+        &self,
+        endian: Elf::Endian,
+        symbol: &'data Elf::Sym,
+        index: usize,
+    ) -> read::Result<Option<SectionIndex>> {
+        match symbol.st_shndx(endian) {
+            elf::SHN_UNDEF => Ok(None),
+            elf::SHN_XINDEX => self
+                .shndx(endian, index)
+                .read_error("Missing ELF symbol extended index")
+                .map(|index| Some(SectionIndex(index as usize))),
+            shndx if shndx < elf::SHN_LORESERVE => Ok(Some(SectionIndex(shndx.into()))),
+            _ => Ok(None),
+        }
+    }
+
+    /// Return the symbol name for the given symbol.
+    pub fn symbol_name(
+        &self,
+        endian: Elf::Endian,
+        symbol: &'data Elf::Sym,
+    ) -> read::Result<&'data [u8]> {
+        symbol.name(endian, self.strings)
+    }
+
+    /// Construct a map from addresses to a user-defined map entry.
+    pub fn map<Entry: SymbolMapEntry, F: Fn(&'data Elf::Sym) -> Option<Entry>>(
+        &self,
+        endian: Elf::Endian,
+        f: F,
+    ) -> SymbolMap<Entry> {
+        let mut symbols = Vec::with_capacity(self.symbols.len());
+        for symbol in self.symbols {
+            if !symbol.is_definition(endian) {
+                continue;
+            }
+            if let Some(entry) = f(symbol) {
+                symbols.push(entry);
+            }
+        }
+        SymbolMap::new(symbols)
+    }
+}
+
+/// A symbol table of an `ElfFile32`.
+pub type ElfSymbolTable32<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    ElfSymbolTable<'data, 'file, elf::FileHeader32<Endian>, R>;
+/// A symbol table of an `ElfFile32`.
+pub type ElfSymbolTable64<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    ElfSymbolTable<'data, 'file, elf::FileHeader64<Endian>, R>;
+
+/// A symbol table of an `ElfFile`.
+#[derive(Debug, Clone, Copy)]
+pub struct ElfSymbolTable<'data, 'file, Elf, R = &'data [u8]>
+where
+    'data: 'file,
+    Elf: FileHeader,
+    R: ReadRef<'data>,
+{
+    pub(super) endian: Elf::Endian,
+    pub(super) symbols: &'file SymbolTable<'data, Elf, R>,
+}
+
+impl<'data, 'file, Elf: FileHeader, R: ReadRef<'data>> read::private::Sealed
+    for ElfSymbolTable<'data, 'file, Elf, R>
+{
+}
+
+impl<'data, 'file, Elf: FileHeader, R: ReadRef<'data>> ObjectSymbolTable<'data>
+    for ElfSymbolTable<'data, 'file, Elf, R>
+{
+    type Symbol = ElfSymbol<'data, 'file, Elf, R>;
+    type SymbolIterator = ElfSymbolIterator<'data, 'file, Elf, R>;
+
+    fn symbols(&self) -> Self::SymbolIterator {
+        ElfSymbolIterator {
+            endian: self.endian,
+            symbols: self.symbols,
+            index: 0,
+        }
+    }
+
+    fn symbol_by_index(&self, index: SymbolIndex) -> read::Result<Self::Symbol> {
+        let symbol = self.symbols.symbol(index.0)?;
+        Ok(ElfSymbol {
+            endian: self.endian,
+            symbols: self.symbols,
+            index,
+            symbol,
+        })
+    }
+}
+
+/// An iterator over the symbols of an `ElfFile32`.
+pub type ElfSymbolIterator32<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    ElfSymbolIterator<'data, 'file, elf::FileHeader32<Endian>, R>;
+/// An iterator over the symbols of an `ElfFile64`.
+pub type ElfSymbolIterator64<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    ElfSymbolIterator<'data, 'file, elf::FileHeader64<Endian>, R>;
+
+/// An iterator over the symbols of an `ElfFile`.
+pub struct ElfSymbolIterator<'data, 'file, Elf, R = &'data [u8]>
+where
+    'data: 'file,
+    Elf: FileHeader,
+    R: ReadRef<'data>,
+{
+    pub(super) endian: Elf::Endian,
+    pub(super) symbols: &'file SymbolTable<'data, Elf, R>,
+    pub(super) index: usize,
+}
+
+impl<'data, 'file, Elf: FileHeader, R: ReadRef<'data>> fmt::Debug
+    for ElfSymbolIterator<'data, 'file, Elf, R>
+{
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("ElfSymbolIterator").finish()
+    }
+}
+
+impl<'data, 'file, Elf: FileHeader, R: ReadRef<'data>> Iterator
+    for ElfSymbolIterator<'data, 'file, Elf, R>
+{
+    type Item = ElfSymbol<'data, 'file, Elf, R>;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        let index = self.index;
+        let symbol = self.symbols.symbols.get(index)?;
+        self.index += 1;
+        Some(ElfSymbol {
+            endian: self.endian,
+            symbols: self.symbols,
+            index: SymbolIndex(index),
+            symbol,
+        })
+    }
+}
+
+/// A symbol of an `ElfFile32`.
+pub type ElfSymbol32<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    ElfSymbol<'data, 'file, elf::FileHeader32<Endian>, R>;
+/// A symbol of an `ElfFile64`.
+pub type ElfSymbol64<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    ElfSymbol<'data, 'file, elf::FileHeader64<Endian>, R>;
+
+/// A symbol of an `ElfFile`.
+#[derive(Debug, Clone, Copy)]
+pub struct ElfSymbol<'data, 'file, Elf, R = &'data [u8]>
+where
+    'data: 'file,
+    Elf: FileHeader,
+    R: ReadRef<'data>,
+{
+    pub(super) endian: Elf::Endian,
+    pub(super) symbols: &'file SymbolTable<'data, Elf, R>,
+    pub(super) index: SymbolIndex,
+    pub(super) symbol: &'data Elf::Sym,
+}
+
+impl<'data, 'file, Elf: FileHeader, R: ReadRef<'data>> read::private::Sealed
+    for ElfSymbol<'data, 'file, Elf, R>
+{
+}
+
+impl<'data, 'file, Elf: FileHeader, R: ReadRef<'data>> ObjectSymbol<'data>
+    for ElfSymbol<'data, 'file, Elf, R>
+{
+    #[inline]
+    fn index(&self) -> SymbolIndex {
+        self.index
+    }
+
+    fn name_bytes(&self) -> read::Result<&'data [u8]> {
+        self.symbol.name(self.endian, self.symbols.strings())
+    }
+
+    fn name(&self) -> read::Result<&'data str> {
+        let name = self.name_bytes()?;
+        str::from_utf8(name)
+            .ok()
+            .read_error("Non UTF-8 ELF symbol name")
+    }
+
+    #[inline]
+    fn address(&self) -> u64 {
+        self.symbol.st_value(self.endian).into()
+    }
+
+    #[inline]
+    fn size(&self) -> u64 {
+        self.symbol.st_size(self.endian).into()
+    }
+
+    fn kind(&self) -> SymbolKind {
+        match self.symbol.st_type() {
+            elf::STT_NOTYPE if self.index.0 == 0 => SymbolKind::Null,
+            elf::STT_NOTYPE => SymbolKind::Label,
+            elf::STT_OBJECT | elf::STT_COMMON => SymbolKind::Data,
+            elf::STT_FUNC | elf::STT_GNU_IFUNC => SymbolKind::Text,
+            elf::STT_SECTION => SymbolKind::Section,
+            elf::STT_FILE => SymbolKind::File,
+            elf::STT_TLS => SymbolKind::Tls,
+            _ => SymbolKind::Unknown,
+        }
+    }
+
+    fn section(&self) -> SymbolSection {
+        match self.symbol.st_shndx(self.endian) {
+            elf::SHN_UNDEF => SymbolSection::Undefined,
+            elf::SHN_ABS => {
+                if self.symbol.st_type() == elf::STT_FILE {
+                    SymbolSection::None
+                } else {
+                    SymbolSection::Absolute
+                }
+            }
+            elf::SHN_COMMON => SymbolSection::Common,
+            elf::SHN_XINDEX => match self.symbols.shndx(self.endian, self.index.0) {
+                Some(index) => SymbolSection::Section(SectionIndex(index as usize)),
+                None => SymbolSection::Unknown,
+            },
+            index if index < elf::SHN_LORESERVE => {
+                SymbolSection::Section(SectionIndex(index as usize))
+            }
+            _ => SymbolSection::Unknown,
+        }
+    }
+
+    #[inline]
+    fn is_undefined(&self) -> bool {
+        self.symbol.st_shndx(self.endian) == elf::SHN_UNDEF
+    }
+
+    #[inline]
+    fn is_definition(&self) -> bool {
+        self.symbol.is_definition(self.endian)
+    }
+
+    #[inline]
+    fn is_common(&self) -> bool {
+        self.symbol.st_shndx(self.endian) == elf::SHN_COMMON
+    }
+
+    #[inline]
+    fn is_weak(&self) -> bool {
+        self.symbol.st_bind() == elf::STB_WEAK
+    }
+
+    fn scope(&self) -> SymbolScope {
+        if self.symbol.st_shndx(self.endian) == elf::SHN_UNDEF {
+            SymbolScope::Unknown
+        } else {
+            match self.symbol.st_bind() {
+                elf::STB_LOCAL => SymbolScope::Compilation,
+                elf::STB_GLOBAL | elf::STB_WEAK => {
+                    if self.symbol.st_visibility() == elf::STV_HIDDEN {
+                        SymbolScope::Linkage
+                    } else {
+                        SymbolScope::Dynamic
+                    }
+                }
+                _ => SymbolScope::Unknown,
+            }
+        }
+    }
+
+    #[inline]
+    fn is_global(&self) -> bool {
+        self.symbol.st_bind() != elf::STB_LOCAL
+    }
+
+    #[inline]
+    fn is_local(&self) -> bool {
+        self.symbol.st_bind() == elf::STB_LOCAL
+    }
+
+    #[inline]
+    fn flags(&self) -> SymbolFlags<SectionIndex> {
+        SymbolFlags::Elf {
+            st_info: self.symbol.st_info(),
+            st_other: self.symbol.st_other(),
+        }
+    }
+}
+
+/// A trait for generic access to `Sym32` and `Sym64`.
+#[allow(missing_docs)]
+pub trait Sym: Debug + Pod {
+    type Word: Into<u64>;
+    type Endian: endian::Endian;
+
+    fn st_name(&self, endian: Self::Endian) -> u32;
+    fn st_info(&self) -> u8;
+    fn st_bind(&self) -> u8;
+    fn st_type(&self) -> u8;
+    fn st_other(&self) -> u8;
+    fn st_visibility(&self) -> u8;
+    fn st_shndx(&self, endian: Self::Endian) -> u16;
+    fn st_value(&self, endian: Self::Endian) -> Self::Word;
+    fn st_size(&self, endian: Self::Endian) -> Self::Word;
+
+    /// Parse the symbol name from the string table.
+    fn name<'data, R: ReadRef<'data>>(
+        &self,
+        endian: Self::Endian,
+        strings: StringTable<'data, R>,
+    ) -> read::Result<&'data [u8]> {
+        strings
+            .get(self.st_name(endian))
+            .read_error("Invalid ELF symbol name offset")
+    }
+
+    /// Return true if the symbol is undefined.
+    #[inline]
+    fn is_undefined(&self, endian: Self::Endian) -> bool {
+        self.st_shndx(endian) == elf::SHN_UNDEF
+    }
+
+    /// Return true if the symbol is a definition of a function or data object.
+    fn is_definition(&self, endian: Self::Endian) -> bool {
+        let st_type = self.st_type();
+        (st_type == elf::STT_NOTYPE || st_type == elf::STT_FUNC || st_type == elf::STT_OBJECT)
+            && self.st_shndx(endian) != elf::SHN_UNDEF
+    }
+}
+
+impl<Endian: endian::Endian> Sym for elf::Sym32<Endian> {
+    type Word = u32;
+    type Endian = Endian;
+
+    #[inline]
+    fn st_name(&self, endian: Self::Endian) -> u32 {
+        self.st_name.get(endian)
+    }
+
+    #[inline]
+    fn st_info(&self) -> u8 {
+        self.st_info
+    }
+
+    #[inline]
+    fn st_bind(&self) -> u8 {
+        self.st_bind()
+    }
+
+    #[inline]
+    fn st_type(&self) -> u8 {
+        self.st_type()
+    }
+
+    #[inline]
+    fn st_other(&self) -> u8 {
+        self.st_other
+    }
+
+    #[inline]
+    fn st_visibility(&self) -> u8 {
+        self.st_visibility()
+    }
+
+    #[inline]
+    fn st_shndx(&self, endian: Self::Endian) -> u16 {
+        self.st_shndx.get(endian)
+    }
+
+    #[inline]
+    fn st_value(&self, endian: Self::Endian) -> Self::Word {
+        self.st_value.get(endian)
+    }
+
+    #[inline]
+    fn st_size(&self, endian: Self::Endian) -> Self::Word {
+        self.st_size.get(endian)
+    }
+}
+
+impl<Endian: endian::Endian> Sym for elf::Sym64<Endian> {
+    type Word = u64;
+    type Endian = Endian;
+
+    #[inline]
+    fn st_name(&self, endian: Self::Endian) -> u32 {
+        self.st_name.get(endian)
+    }
+
+    #[inline]
+    fn st_info(&self) -> u8 {
+        self.st_info
+    }
+
+    #[inline]
+    fn st_bind(&self) -> u8 {
+        self.st_bind()
+    }
+
+    #[inline]
+    fn st_type(&self) -> u8 {
+        self.st_type()
+    }
+
+    #[inline]
+    fn st_other(&self) -> u8 {
+        self.st_other
+    }
+
+    #[inline]
+    fn st_visibility(&self) -> u8 {
+        self.st_visibility()
+    }
+
+    #[inline]
+    fn st_shndx(&self, endian: Self::Endian) -> u16 {
+        self.st_shndx.get(endian)
+    }
+
+    #[inline]
+    fn st_value(&self, endian: Self::Endian) -> Self::Word {
+        self.st_value.get(endian)
+    }
+
+    #[inline]
+    fn st_size(&self, endian: Self::Endian) -> Self::Word {
+        self.st_size.get(endian)
+    }
+}
diff --git a/third_party/rust/object/src/read/elf/version.rs b/third_party/rust/object/src/read/elf/version.rs
new file mode 100644
index 0000000000..6d80ba1e35
--- /dev/null
+++ b/third_party/rust/object/src/read/elf/version.rs
@@ -0,0 +1,421 @@
+use alloc::vec::Vec;
+
+use crate::read::{Bytes, ReadError, ReadRef, Result, StringTable};
+use crate::{elf, endian};
+
+use super::FileHeader;
+
+/// A version index.
+#[derive(Debug, Default, Clone, Copy)]
+pub struct VersionIndex(pub u16);
+
+impl VersionIndex {
+    /// Return the version index.
+    pub fn index(&self) -> u16 {
+        self.0 & elf::VERSYM_VERSION
+    }
+
+    /// Return true if it is the local index.
+    pub fn is_local(&self) -> bool {
+        self.index() == elf::VER_NDX_LOCAL
+    }
+
+    /// Return true if it is the global index.
+    pub fn is_global(&self) -> bool {
+        self.index() == elf::VER_NDX_GLOBAL
+    }
+
+    /// Return the hidden flag.
+    pub fn is_hidden(&self) -> bool {
+        self.0 & elf::VERSYM_HIDDEN != 0
+    }
+}
+
+/// A version definition or requirement.
+///
+/// This is derived from entries in the `SHT_GNU_verdef` and `SHT_GNU_verneed` sections.
+#[derive(Debug, Default, Clone, Copy)]
+pub struct Version<'data> {
+    name: &'data [u8],
+    hash: u32,
+    // Used to keep track of valid indices in `VersionTable`.
+    valid: bool,
+}
+
+impl<'data> Version<'data> {
+    /// Return the version name.
+    pub fn name(&self) -> &'data [u8] {
+        self.name
+    }
+
+    /// Return hash of the version name.
+    pub fn hash(&self) -> u32 {
+        self.hash
+    }
+}
+
+/// A table of version definitions and requirements.
+///
+/// It allows looking up the version information for a given symbol index.
+///
+/// This is derived from entries in the `SHT_GNU_versym`, `SHT_GNU_verdef` and `SHT_GNU_verneed` sections.
+#[derive(Debug, Clone)]
+pub struct VersionTable<'data, Elf: FileHeader> {
+    symbols: &'data [elf::Versym<Elf::Endian>],
+    versions: Vec<Version<'data>>,
+}
+
+impl<'data, Elf: FileHeader> Default for VersionTable<'data, Elf> {
+    fn default() -> Self {
+        VersionTable {
+            symbols: &[],
+            versions: Vec::new(),
+        }
+    }
+}
+
+impl<'data, Elf: FileHeader> VersionTable<'data, Elf> {
+    /// Parse the version sections.
+    pub fn parse<R: ReadRef<'data>>(
+        endian: Elf::Endian,
+        versyms: &'data [elf::Versym<Elf::Endian>],
+        verdefs: Option<VerdefIterator<'data, Elf>>,
+        verneeds: Option<VerneedIterator<'data, Elf>>,
+        strings: StringTable<'data, R>,
+    ) -> Result<Self> {
+        let mut max_index = 0;
+        if let Some(mut verdefs) = verdefs.clone() {
+            while let Some((verdef, _)) = verdefs.next()? {
+                if verdef.vd_flags.get(endian) & elf::VER_FLG_BASE != 0 {
+                    continue;
+                }
+                let index = verdef.vd_ndx.get(endian) & elf::VERSYM_VERSION;
+                if max_index < index {
+                    max_index = index;
+                }
+            }
+        }
+        if let Some(mut verneeds) = verneeds.clone() {
+            while let Some((_, mut vernauxs)) = verneeds.next()? {
+                while let Some(vernaux) = vernauxs.next()? {
+                    let index = vernaux.vna_other.get(endian) & elf::VERSYM_VERSION;
+                    if max_index < index {
+                        max_index = index;
+                    }
+                }
+            }
+        }
+
+        // Indices should be sequential, but this could be up to
+        // 32k * size_of::<Version>() if max_index is bad.
+        let mut versions = vec![Version::default(); max_index as usize + 1];
+
+        if let Some(mut verdefs) = verdefs {
+            while let Some((verdef, mut verdauxs)) = verdefs.next()? {
+                if verdef.vd_flags.get(endian) & elf::VER_FLG_BASE != 0 {
+                    continue;
+                }
+                let index = verdef.vd_ndx.get(endian) & elf::VERSYM_VERSION;
+                if index <= elf::VER_NDX_GLOBAL {
+                    // TODO: return error?
+                    continue;
+                }
+                if let Some(verdaux) = verdauxs.next()? {
+                    versions[usize::from(index)] = Version {
+                        name: verdaux.name(endian, strings)?,
+                        hash: verdef.vd_hash.get(endian),
+                        valid: true,
+                    };
+                }
+            }
+        }
+        if let Some(mut verneeds) = verneeds {
+            while let Some((_, mut vernauxs)) = verneeds.next()? {
+                while let Some(vernaux) = vernauxs.next()? {
+                    let index = vernaux.vna_other.get(endian) & elf::VERSYM_VERSION;
+                    if index <= elf::VER_NDX_GLOBAL {
+                        // TODO: return error?
+                        continue;
+                    }
+                    versions[usize::from(index)] = Version {
+                        name: vernaux.name(endian, strings)?,
+                        hash: vernaux.vna_hash.get(endian),
+                        valid: true,
+                    };
+                }
+            }
+        }
+
+        Ok(VersionTable {
+            symbols: versyms,
+            versions,
+        })
+    }
+
+    /// Return true if the version table is empty.
+    pub fn is_empty(&self) -> bool {
+        self.symbols.is_empty()
+    }
+
+    /// Return version index for a given symbol index.
+    pub fn version_index(&self, endian: Elf::Endian, index: usize) -> VersionIndex {
+        let version_index = match self.symbols.get(index) {
+            Some(x) => x.0.get(endian),
+            // Ideally this would be VER_NDX_LOCAL for undefined symbols,
+            // but currently there are no checks that need this distinction.
+            None => elf::VER_NDX_GLOBAL,
+        };
+        VersionIndex(version_index)
+    }
+
+    /// Return version information for a given symbol version index.
+    ///
+    /// Returns `Ok(None)` for local and global versions.
+    /// Returns `Err(_)` if index is invalid.
+    pub fn version(&self, index: VersionIndex) -> Result<Option<&Version<'data>>> {
+        if index.index() <= elf::VER_NDX_GLOBAL {
+            return Ok(None);
+        }
+        self.versions
+            .get(usize::from(index.index()))
+            .filter(|version| version.valid)
+            .read_error("Invalid ELF symbol version index")
+            .map(Some)
+    }
+
+    /// Return true if the given symbol index satisifies the requirements of `need`.
+    ///
+    /// Returns false for any error.
+    ///
+    /// Note: this function hasn't been fully tested and is likely to be incomplete.
+    pub fn matches(&self, endian: Elf::Endian, index: usize, need: Option<&Version>) -> bool {
+        let version_index = self.version_index(endian, index);
+        let def = match self.version(version_index) {
+            Ok(def) => def,
+            Err(_) => return false,
+        };
+        match (def, need) {
+            (Some(def), Some(need)) => need.hash == def.hash && need.name == def.name,
+            (None, Some(_need)) => {
+                // Version must be present if needed.
+                false
+            }
+            (Some(_def), None) => {
+                // For a dlsym call, use the newest version.
+                // TODO: if not a dlsym call, then use the oldest version.
+                !version_index.is_hidden()
+            }
+            (None, None) => true,
+        }
+    }
+}
+
+/// An iterator over the entries in an ELF `SHT_GNU_verdef` section.
+#[derive(Debug, Clone)]
+pub struct VerdefIterator<'data, Elf: FileHeader> {
+    endian: Elf::Endian,
+    data: Bytes<'data>,
+}
+
+impl<'data, Elf: FileHeader> VerdefIterator<'data, Elf> {
+    pub(super) fn new(endian: Elf::Endian, data: &'data [u8]) -> Self {
+        VerdefIterator {
+            endian,
+            data: Bytes(data),
+        }
+    }
+
+    /// Return the next `Verdef` entry.
+    pub fn next(
+        &mut self,
+    ) -> Result<Option<(&'data elf::Verdef<Elf::Endian>, VerdauxIterator<'data, Elf>)>> {
+        if self.data.is_empty() {
+            return Ok(None);
+        }
+
+        let verdef = self
+            .data
+            .read_at::<elf::Verdef<_>>(0)
+            .read_error("ELF verdef is too short")?;
+
+        let mut verdaux_data = self.data;
+        verdaux_data
+            .skip(verdef.vd_aux.get(self.endian) as usize)
+            .read_error("Invalid ELF vd_aux")?;
+        let verdaux =
+            VerdauxIterator::new(self.endian, verdaux_data.0, verdef.vd_cnt.get(self.endian));
+
+        let next = verdef.vd_next.get(self.endian);
+        if next != 0 {
+            self.data
+                .skip(next as usize)
+                .read_error("Invalid ELF vd_next")?;
+        } else {
+            self.data = Bytes(&[]);
+        }
+        Ok(Some((verdef, verdaux)))
+    }
+}
+
+/// An iterator over the auxiliary records for an entry in an ELF `SHT_GNU_verdef` section.
+#[derive(Debug, Clone)]
+pub struct VerdauxIterator<'data, Elf: FileHeader> {
+    endian: Elf::Endian,
+    data: Bytes<'data>,
+    count: u16,
+}
+
+impl<'data, Elf: FileHeader> VerdauxIterator<'data, Elf> {
+    pub(super) fn new(endian: Elf::Endian, data: &'data [u8], count: u16) -> Self {
+        VerdauxIterator {
+            endian,
+            data: Bytes(data),
+            count,
+        }
+    }
+
+    /// Return the next `Verdaux` entry.
+    pub fn next(&mut self) -> Result<Option<&'data elf::Verdaux<Elf::Endian>>> {
+        if self.count == 0 {
+            return Ok(None);
+        }
+
+        let verdaux = self
+            .data
+            .read_at::<elf::Verdaux<_>>(0)
+            .read_error("ELF verdaux is too short")?;
+
+        self.data
+            .skip(verdaux.vda_next.get(self.endian) as usize)
+            .read_error("Invalid ELF vda_next")?;
+        self.count -= 1;
+        Ok(Some(verdaux))
+    }
+}
+
+/// An iterator over the entries in an ELF `SHT_GNU_verneed` section.
+#[derive(Debug, Clone)]
+pub struct VerneedIterator<'data, Elf: FileHeader> {
+    endian: Elf::Endian,
+    data: Bytes<'data>,
+}
+
+impl<'data, Elf: FileHeader> VerneedIterator<'data, Elf> {
+    pub(super) fn new(endian: Elf::Endian, data: &'data [u8]) -> Self {
+        VerneedIterator {
+            endian,
+            data: Bytes(data),
+        }
+    }
+
+    /// Return the next `Verneed` entry.
+    pub fn next(
+        &mut self,
+    ) -> Result<
+        Option<(
+            &'data elf::Verneed<Elf::Endian>,
+            VernauxIterator<'data, Elf>,
+        )>,
+    > {
+        if self.data.is_empty() {
+            return Ok(None);
+        }
+
+        let verneed = self
+            .data
+            .read_at::<elf::Verneed<_>>(0)
+            .read_error("ELF verneed is too short")?;
+
+        let mut vernaux_data = self.data;
+        vernaux_data
+            .skip(verneed.vn_aux.get(self.endian) as usize)
+            .read_error("Invalid ELF vn_aux")?;
+        let vernaux =
+            VernauxIterator::new(self.endian, vernaux_data.0, verneed.vn_cnt.get(self.endian));
+
+        let next = verneed.vn_next.get(self.endian);
+        if next != 0 {
+            self.data
+                .skip(next as usize)
+                .read_error("Invalid ELF vn_next")?;
+        } else {
+            self.data = Bytes(&[]);
+        }
+        Ok(Some((verneed, vernaux)))
+    }
+}
+
+/// An iterator over the auxiliary records for an entry in an ELF `SHT_GNU_verneed` section.
+#[derive(Debug, Clone)]
+pub struct VernauxIterator<'data, Elf: FileHeader> {
+    endian: Elf::Endian,
+    data: Bytes<'data>,
+    count: u16,
+}
+
+impl<'data, Elf: FileHeader> VernauxIterator<'data, Elf> {
+    pub(super) fn new(endian: Elf::Endian, data: &'data [u8], count: u16) -> Self {
+        VernauxIterator {
+            endian,
+            data: Bytes(data),
+            count,
+        }
+    }
+
+    /// Return the next `Vernaux` entry.
+    pub fn next(&mut self) -> Result<Option<&'data elf::Vernaux<Elf::Endian>>> {
+        if self.count == 0 {
+            return Ok(None);
+        }
+
+        let vernaux = self
+            .data
+            .read_at::<elf::Vernaux<_>>(0)
+            .read_error("ELF vernaux is too short")?;
+
+        self.data
+            .skip(vernaux.vna_next.get(self.endian) as usize)
+            .read_error("Invalid ELF vna_next")?;
+        self.count -= 1;
+        Ok(Some(vernaux))
+    }
+}
+
+impl<Endian: endian::Endian> elf::Verdaux<Endian> {
+    /// Parse the version name from the string table.
+    pub fn name<'data, R: ReadRef<'data>>(
+        &self,
+        endian: Endian,
+        strings: StringTable<'data, R>,
+    ) -> Result<&'data [u8]> {
+        strings
+            .get(self.vda_name.get(endian))
+            .read_error("Invalid ELF vda_name")
+    }
+}
+
+impl<Endian: endian::Endian> elf::Verneed<Endian> {
+    /// Parse the file from the string table.
+    pub fn file<'data, R: ReadRef<'data>>(
+        &self,
+        endian: Endian,
+        strings: StringTable<'data, R>,
+    ) -> Result<&'data [u8]> {
+        strings
+            .get(self.vn_file.get(endian))
+            .read_error("Invalid ELF vn_file")
+    }
+}
+
+impl<Endian: endian::Endian> elf::Vernaux<Endian> {
+    /// Parse the version name from the string table.
+    pub fn name<'data, R: ReadRef<'data>>(
+        &self,
+        endian: Endian,
+        strings: StringTable<'data, R>,
+    ) -> Result<&'data [u8]> {
+        strings
+            .get(self.vna_name.get(endian))
+            .read_error("Invalid ELF vna_name")
+    }
+}
diff --git a/third_party/rust/object/src/read/macho/dyld_cache.rs b/third_party/rust/object/src/read/macho/dyld_cache.rs
new file mode 100644
index 0000000000..0839ded7d7
--- /dev/null
+++ b/third_party/rust/object/src/read/macho/dyld_cache.rs
@@ -0,0 +1,343 @@
+use alloc::vec::Vec;
+use core::slice;
+
+use crate::read::{Error, File, ReadError, ReadRef, Result};
+use crate::{macho, Architecture, Endian, Endianness};
+
+/// A parsed representation of the dyld shared cache.
+#[derive(Debug)]
+pub struct DyldCache<'data, E = Endianness, R = &'data [u8]>
+where
+    E: Endian,
+    R: ReadRef<'data>,
+{
+    endian: E,
+    data: R,
+    subcaches: Vec<DyldSubCache<'data, E, R>>,
+    mappings: &'data [macho::DyldCacheMappingInfo<E>],
+    images: &'data [macho::DyldCacheImageInfo<E>],
+    arch: Architecture,
+}
+
+/// Information about a subcache.
+#[derive(Debug)]
+pub struct DyldSubCache<'data, E = Endianness, R = &'data [u8]>
+where
+    E: Endian,
+    R: ReadRef<'data>,
+{
+    data: R,
+    mappings: &'data [macho::DyldCacheMappingInfo<E>],
+}
+
+// This is the offset of the images_across_all_subcaches_count field.
+const MIN_HEADER_SIZE_SUBCACHES: u32 = 0x1c4;
+
+impl<'data, E, R> DyldCache<'data, E, R>
+where
+    E: Endian,
+    R: ReadRef<'data>,
+{
+    /// Parse the raw dyld shared cache data.
+    /// For shared caches from macOS 12 / iOS 15 and above, the subcache files need to be
+    /// supplied as well, in the correct order, with the .symbols subcache last (if present).
+    /// For example, data would be the data for dyld_shared_cache_x86_64,
+    /// and subcache_data would be the data for [dyld_shared_cache_x86_64.1, dyld_shared_cache_x86_64.2, ...]
+    pub fn parse(data: R, subcache_data: &[R]) -> Result<Self> {
+        let header = macho::DyldCacheHeader::parse(data)?;
+        let (arch, endian) = header.parse_magic()?;
+        let mappings = header.mappings(endian, data)?;
+
+        let symbols_subcache_uuid = header.symbols_subcache_uuid(endian);
+        let subcaches_info = header.subcaches(endian, data)?.unwrap_or(&[]);
+
+        if subcache_data.len() != subcaches_info.len() + symbols_subcache_uuid.is_some() as usize {
+            return Err(Error("Incorrect number of SubCaches"));
+        }
+
+        // Split out the .symbols subcache data from the other subcaches.
+        let (symbols_subcache_data_and_uuid, subcache_data) =
+            if let Some(symbols_uuid) = symbols_subcache_uuid {
+                let (sym_data, rest_data) = subcache_data.split_last().unwrap();
+                (Some((*sym_data, symbols_uuid)), rest_data)
+            } else {
+                (None, subcache_data)
+            };
+
+        // Read the regular SubCaches (.1, .2, ...), if present.
+        let mut subcaches = Vec::new();
+        for (&data, info) in subcache_data.iter().zip(subcaches_info.iter()) {
+            let sc_header = macho::DyldCacheHeader::<E>::parse(data)?;
+            if sc_header.uuid != info.uuid {
+                return Err(Error("Unexpected SubCache UUID"));
+            }
+            let mappings = sc_header.mappings(endian, data)?;
+            subcaches.push(DyldSubCache { data, mappings });
+        }
+
+        // Read the .symbols SubCache, if present.
+        // Other than the UUID verification, the symbols SubCache is currently unused.
+        let _symbols_subcache = match symbols_subcache_data_and_uuid {
+            Some((data, uuid)) => {
+                let sc_header = macho::DyldCacheHeader::<E>::parse(data)?;
+                if sc_header.uuid != uuid {
+                    return Err(Error("Unexpected .symbols SubCache UUID"));
+                }
+                let mappings = sc_header.mappings(endian, data)?;
+                Some(DyldSubCache { data, mappings })
+            }
+            None => None,
+        };
+
+        let images = header.images(endian, data)?;
+        Ok(DyldCache {
+            endian,
+            data,
+            subcaches,
+            mappings,
+            images,
+            arch,
+        })
+    }
+
+    /// Get the architecture type of the file.
+    pub fn architecture(&self) -> Architecture {
+        self.arch
+    }
+
+    /// Get the endianness of the file.
+    #[inline]
+    pub fn endianness(&self) -> Endianness {
+        if self.is_little_endian() {
+            Endianness::Little
+        } else {
+            Endianness::Big
+        }
+    }
+
+    /// Return true if the file is little endian, false if it is big endian.
+    pub fn is_little_endian(&self) -> bool {
+        self.endian.is_little_endian()
+    }
+
+    /// Iterate over the images in this cache.
+    pub fn images<'cache>(&'cache self) -> DyldCacheImageIterator<'data, 'cache, E, R> {
+        DyldCacheImageIterator {
+            cache: self,
+            iter: self.images.iter(),
+        }
+    }
+
+    /// Find the address in a mapping and return the cache or subcache data it was found in,
+    /// together with the translated file offset.
+    pub fn data_and_offset_for_address(&self, address: u64) -> Option<(R, u64)> {
+        if let Some(file_offset) = address_to_file_offset(address, self.endian, self.mappings) {
+            return Some((self.data, file_offset));
+        }
+        for subcache in &self.subcaches {
+            if let Some(file_offset) =
+                address_to_file_offset(address, self.endian, subcache.mappings)
+            {
+                return Some((subcache.data, file_offset));
+            }
+        }
+        None
+    }
+}
+
+/// An iterator over all the images (dylibs) in the dyld shared cache.
+#[derive(Debug)]
+pub struct DyldCacheImageIterator<'data, 'cache, E = Endianness, R = &'data [u8]>
+where
+    E: Endian,
+    R: ReadRef<'data>,
+{
+    cache: &'cache DyldCache<'data, E, R>,
+    iter: slice::Iter<'data, macho::DyldCacheImageInfo<E>>,
+}
+
+impl<'data, 'cache, E, R> Iterator for DyldCacheImageIterator<'data, 'cache, E, R>
+where
+    E: Endian,
+    R: ReadRef<'data>,
+{
+    type Item = DyldCacheImage<'data, 'cache, E, R>;
+
+    fn next(&mut self) -> Option<DyldCacheImage<'data, 'cache, E, R>> {
+        let image_info = self.iter.next()?;
+        Some(DyldCacheImage {
+            cache: self.cache,
+            image_info,
+        })
+    }
+}
+
+/// One image (dylib) from inside the dyld shared cache.
+#[derive(Debug)]
+pub struct DyldCacheImage<'data, 'cache, E = Endianness, R = &'data [u8]>
+where
+    E: Endian,
+    R: ReadRef<'data>,
+{
+    pub(crate) cache: &'cache DyldCache<'data, E, R>,
+    image_info: &'data macho::DyldCacheImageInfo<E>,
+}
+
+impl<'data, 'cache, E, R> DyldCacheImage<'data, 'cache, E, R>
+where
+    E: Endian,
+    R: ReadRef<'data>,
+{
+    /// The file system path of this image.
+    pub fn path(&self) -> Result<&'data str> {
+        let path = self.image_info.path(self.cache.endian, self.cache.data)?;
+        // The path should always be ascii, so from_utf8 should alway succeed.
+        let path = core::str::from_utf8(path).map_err(|_| Error("Path string not valid utf-8"))?;
+        Ok(path)
+    }
+
+    /// The subcache data which contains the Mach-O header for this image,
+    /// together with the file offset at which this image starts.
+    pub fn image_data_and_offset(&self) -> Result<(R, u64)> {
+        let address = self.image_info.address.get(self.cache.endian);
+        self.cache
+            .data_and_offset_for_address(address)
+            .ok_or(Error("Address not found in any mapping"))
+    }
+
+    /// Parse this image into an Object.
+    pub fn parse_object(&self) -> Result<File<'data, R>> {
+        File::parse_dyld_cache_image(self)
+    }
+}
+
+impl<E: Endian> macho::DyldCacheHeader<E> {
+    /// Read the dyld cache header.
+    pub fn parse<'data, R: ReadRef<'data>>(data: R) -> Result<&'data Self> {
+        data.read_at::<macho::DyldCacheHeader<E>>(0)
+            .read_error("Invalid dyld cache header size or alignment")
+    }
+
+    /// Returns (arch, endian) based on the magic string.
+    pub fn parse_magic(&self) -> Result<(Architecture, E)> {
+        let (arch, is_big_endian) = match &self.magic {
+            b"dyld_v1    i386\0" => (Architecture::I386, false),
+            b"dyld_v1  x86_64\0" => (Architecture::X86_64, false),
+            b"dyld_v1 x86_64h\0" => (Architecture::X86_64, false),
+            b"dyld_v1     ppc\0" => (Architecture::PowerPc, true),
+            b"dyld_v1   armv6\0" => (Architecture::Arm, false),
+            b"dyld_v1   armv7\0" => (Architecture::Arm, false),
+            b"dyld_v1  armv7f\0" => (Architecture::Arm, false),
+            b"dyld_v1  armv7s\0" => (Architecture::Arm, false),
+            b"dyld_v1  armv7k\0" => (Architecture::Arm, false),
+            b"dyld_v1   arm64\0" => (Architecture::Aarch64, false),
+            b"dyld_v1  arm64e\0" => (Architecture::Aarch64, false),
+            _ => return Err(Error("Unrecognized dyld cache magic")),
+        };
+        let endian =
+            E::from_big_endian(is_big_endian).read_error("Unsupported dyld cache endian")?;
+        Ok((arch, endian))
+    }
+
+    /// Return the mapping information table.
+    pub fn mappings<'data, R: ReadRef<'data>>(
+        &self,
+        endian: E,
+        data: R,
+    ) -> Result<&'data [macho::DyldCacheMappingInfo<E>]> {
+        data.read_slice_at::<macho::DyldCacheMappingInfo<E>>(
+            self.mapping_offset.get(endian).into(),
+            self.mapping_count.get(endian) as usize,
+        )
+        .read_error("Invalid dyld cache mapping size or alignment")
+    }
+
+    /// Return the information about subcaches, if present.
+    pub fn subcaches<'data, R: ReadRef<'data>>(
+        &self,
+        endian: E,
+        data: R,
+    ) -> Result<Option<&'data [macho::DyldSubCacheInfo<E>]>> {
+        if self.mapping_offset.get(endian) >= MIN_HEADER_SIZE_SUBCACHES {
+            let subcaches = data
+                .read_slice_at::<macho::DyldSubCacheInfo<E>>(
+                    self.subcaches_offset.get(endian).into(),
+                    self.subcaches_count.get(endian) as usize,
+                )
+                .read_error("Invalid dyld subcaches size or alignment")?;
+            Ok(Some(subcaches))
+        } else {
+            Ok(None)
+        }
+    }
+
+    /// Return the UUID for the .symbols subcache, if present.
+    pub fn symbols_subcache_uuid(&self, endian: E) -> Option<[u8; 16]> {
+        if self.mapping_offset.get(endian) >= MIN_HEADER_SIZE_SUBCACHES {
+            let uuid = self.symbols_subcache_uuid;
+            if uuid != [0; 16] {
+                return Some(uuid);
+            }
+        }
+        None
+    }
+
+    /// Return the image information table.
+    pub fn images<'data, R: ReadRef<'data>>(
+        &self,
+        endian: E,
+        data: R,
+    ) -> Result<&'data [macho::DyldCacheImageInfo<E>]> {
+        if self.mapping_offset.get(endian) >= MIN_HEADER_SIZE_SUBCACHES {
+            data.read_slice_at::<macho::DyldCacheImageInfo<E>>(
+                self.images_across_all_subcaches_offset.get(endian).into(),
+                self.images_across_all_subcaches_count.get(endian) as usize,
+            )
+            .read_error("Invalid dyld cache image size or alignment")
+        } else {
+            data.read_slice_at::<macho::DyldCacheImageInfo<E>>(
+                self.images_offset.get(endian).into(),
+                self.images_count.get(endian) as usize,
+            )
+            .read_error("Invalid dyld cache image size or alignment")
+        }
+    }
+}
+
+impl<E: Endian> macho::DyldCacheImageInfo<E> {
+    /// The file system path of this image.
+    pub fn path<'data, R: ReadRef<'data>>(&self, endian: E, data: R) -> Result<&'data [u8]> {
+        let r_start = self.path_file_offset.get(endian).into();
+        let r_end = data.len().read_error("Couldn't get data len()")?;
+        data.read_bytes_at_until(r_start..r_end, 0)
+            .read_error("Couldn't read dyld cache image path")
+    }
+
+    /// Find the file offset of the image by looking up its address in the mappings.
+    pub fn file_offset(
+        &self,
+        endian: E,
+        mappings: &[macho::DyldCacheMappingInfo<E>],
+    ) -> Result<u64> {
+        let address = self.address.get(endian);
+        address_to_file_offset(address, endian, mappings)
+            .read_error("Invalid dyld cache image address")
+    }
+}
+
+/// Find the file offset of the image by looking up its address in the mappings.
+pub fn address_to_file_offset<E: Endian>(
+    address: u64,
+    endian: E,
+    mappings: &[macho::DyldCacheMappingInfo<E>],
+) -> Option<u64> {
+    for mapping in mappings {
+        let mapping_address = mapping.address.get(endian);
+        if address >= mapping_address
+            && address < mapping_address.wrapping_add(mapping.size.get(endian))
+        {
+            return Some(address - mapping_address + mapping.file_offset.get(endian));
+        }
+    }
+    None
+}
diff --git a/third_party/rust/object/src/read/macho/fat.rs b/third_party/rust/object/src/read/macho/fat.rs
new file mode 100644
index 0000000000..d4301b7e11
--- /dev/null
+++ b/third_party/rust/object/src/read/macho/fat.rs
@@ -0,0 +1,122 @@
+use crate::read::{Architecture, Error, ReadError, ReadRef, Result};
+use crate::{macho, BigEndian, Pod};
+
+pub use macho::{FatArch32, FatArch64, FatHeader};
+
+impl FatHeader {
+    /// Attempt to parse a fat header.
+    ///
+    /// Does not validate the magic value.
+    pub fn parse<'data, R: ReadRef<'data>>(file: R) -> Result<&'data FatHeader> {
+        file.read_at::<FatHeader>(0)
+            .read_error("Invalid fat header size or alignment")
+    }
+
+    /// Attempt to parse a fat header and 32-bit fat arches.
+    pub fn parse_arch32<'data, R: ReadRef<'data>>(file: R) -> Result<&'data [FatArch32]> {
+        let mut offset = 0;
+        let header = file
+            .read::<FatHeader>(&mut offset)
+            .read_error("Invalid fat header size or alignment")?;
+        if header.magic.get(BigEndian) != macho::FAT_MAGIC {
+            return Err(Error("Invalid 32-bit fat magic"));
+        }
+        file.read_slice::<FatArch32>(&mut offset, header.nfat_arch.get(BigEndian) as usize)
+            .read_error("Invalid nfat_arch")
+    }
+
+    /// Attempt to parse a fat header and 64-bit fat arches.
+    pub fn parse_arch64<'data, R: ReadRef<'data>>(file: R) -> Result<&'data [FatArch64]> {
+        let mut offset = 0;
+        let header = file
+            .read::<FatHeader>(&mut offset)
+            .read_error("Invalid fat header size or alignment")?;
+        if header.magic.get(BigEndian) != macho::FAT_MAGIC_64 {
+            return Err(Error("Invalid 64-bit fat magic"));
+        }
+        file.read_slice::<FatArch64>(&mut offset, header.nfat_arch.get(BigEndian) as usize)
+            .read_error("Invalid nfat_arch")
+    }
+}
+
+/// A trait for generic access to `FatArch32` and `FatArch64`.
+#[allow(missing_docs)]
+pub trait FatArch: Pod {
+    type Word: Into<u64>;
+
+    fn cputype(&self) -> u32;
+    fn cpusubtype(&self) -> u32;
+    fn offset(&self) -> Self::Word;
+    fn size(&self) -> Self::Word;
+    fn align(&self) -> u32;
+
+    fn architecture(&self) -> Architecture {
+        match self.cputype() {
+            macho::CPU_TYPE_ARM => Architecture::Arm,
+            macho::CPU_TYPE_ARM64 => Architecture::Aarch64,
+            macho::CPU_TYPE_X86 => Architecture::I386,
+            macho::CPU_TYPE_X86_64 => Architecture::X86_64,
+            macho::CPU_TYPE_MIPS => Architecture::Mips,
+            macho::CPU_TYPE_POWERPC => Architecture::PowerPc,
+            macho::CPU_TYPE_POWERPC64 => Architecture::PowerPc64,
+            _ => Architecture::Unknown,
+        }
+    }
+
+    fn file_range(&self) -> (u64, u64) {
+        (self.offset().into(), self.size().into())
+    }
+
+    fn data<'data, R: ReadRef<'data>>(&self, file: R) -> Result<&'data [u8]> {
+        file.read_bytes_at(self.offset().into(), self.size().into())
+            .read_error("Invalid fat arch offset or size")
+    }
+}
+
+impl FatArch for FatArch32 {
+    type Word = u32;
+
+    fn cputype(&self) -> u32 {
+        self.cputype.get(BigEndian)
+    }
+
+    fn cpusubtype(&self) -> u32 {
+        self.cpusubtype.get(BigEndian)
+    }
+
+    fn offset(&self) -> Self::Word {
+        self.offset.get(BigEndian)
+    }
+
+    fn size(&self) -> Self::Word {
+        self.size.get(BigEndian)
+    }
+
+    fn align(&self) -> u32 {
+        self.align.get(BigEndian)
+    }
+}
+
+impl FatArch for FatArch64 {
+    type Word = u64;
+
+    fn cputype(&self) -> u32 {
+        self.cputype.get(BigEndian)
+    }
+
+    fn cpusubtype(&self) -> u32 {
+        self.cpusubtype.get(BigEndian)
+    }
+
+    fn offset(&self) -> Self::Word {
+        self.offset.get(BigEndian)
+    }
+
+    fn size(&self) -> Self::Word {
+        self.size.get(BigEndian)
+    }
+
+    fn align(&self) -> u32 {
+        self.align.get(BigEndian)
+    }
+}
diff --git a/third_party/rust/object/src/read/macho/file.rs b/third_party/rust/object/src/read/macho/file.rs
new file mode 100644
index 0000000000..ab8c05757f
--- /dev/null
+++ b/third_party/rust/object/src/read/macho/file.rs
@@ -0,0 +1,731 @@
+use alloc::vec::Vec;
+use core::fmt::Debug;
+use core::{mem, str};
+
+use crate::read::{
+    self, Architecture, ComdatKind, Error, Export, FileFlags, Import, NoDynamicRelocationIterator,
+    Object, ObjectComdat, ObjectKind, ObjectMap, ObjectSection, ReadError, ReadRef, Result,
+    SectionIndex, SymbolIndex,
+};
+use crate::{endian, macho, BigEndian, ByteString, Endian, Endianness, Pod};
+
+use super::{
+    DyldCacheImage, LoadCommandIterator, MachOSection, MachOSectionInternal, MachOSectionIterator,
+    MachOSegment, MachOSegmentInternal, MachOSegmentIterator, MachOSymbol, MachOSymbolIterator,
+    MachOSymbolTable, Nlist, Section, Segment, SymbolTable,
+};
+
+/// A 32-bit Mach-O object file.
+pub type MachOFile32<'data, Endian = Endianness, R = &'data [u8]> =
+    MachOFile<'data, macho::MachHeader32<Endian>, R>;
+/// A 64-bit Mach-O object file.
+pub type MachOFile64<'data, Endian = Endianness, R = &'data [u8]> =
+    MachOFile<'data, macho::MachHeader64<Endian>, R>;
+
+/// A partially parsed Mach-O file.
+///
+/// Most of the functionality of this type is provided by the `Object` trait implementation.
+#[derive(Debug)]
+pub struct MachOFile<'data, Mach, R = &'data [u8]>
+where
+    Mach: MachHeader,
+    R: ReadRef<'data>,
+{
+    pub(super) endian: Mach::Endian,
+    pub(super) data: R,
+    pub(super) header_offset: u64,
+    pub(super) header: &'data Mach,
+    pub(super) segments: Vec<MachOSegmentInternal<'data, Mach, R>>,
+    pub(super) sections: Vec<MachOSectionInternal<'data, Mach>>,
+    pub(super) symbols: SymbolTable<'data, Mach, R>,
+}
+
+impl<'data, Mach, R> MachOFile<'data, Mach, R>
+where
+    Mach: MachHeader,
+    R: ReadRef<'data>,
+{
+    /// Parse the raw Mach-O file data.
+    pub fn parse(data: R) -> Result<Self> {
+        let header = Mach::parse(data, 0)?;
+        let endian = header.endian()?;
+
+        // Build a list of segments and sections to make some operations more efficient.
+        let mut segments = Vec::new();
+        let mut sections = Vec::new();
+        let mut symbols = SymbolTable::default();
+        if let Ok(mut commands) = header.load_commands(endian, data, 0) {
+            while let Ok(Some(command)) = commands.next() {
+                if let Some((segment, section_data)) = Mach::Segment::from_command(command)? {
+                    let segment_index = segments.len();
+                    segments.push(MachOSegmentInternal { segment, data });
+                    for section in segment.sections(endian, section_data)? {
+                        let index = SectionIndex(sections.len() + 1);
+                        sections.push(MachOSectionInternal::parse(index, segment_index, section));
+                    }
+                } else if let Some(symtab) = command.symtab()? {
+                    symbols = symtab.symbols(endian, data)?;
+                }
+            }
+        }
+
+        Ok(MachOFile {
+            endian,
+            data,
+            header_offset: 0,
+            header,
+            segments,
+            sections,
+            symbols,
+        })
+    }
+
+    /// Parse the Mach-O file for the given image from the dyld shared cache.
+    /// This will read different sections from different subcaches, if necessary.
+    pub fn parse_dyld_cache_image<'cache, E: Endian>(
+        image: &DyldCacheImage<'data, 'cache, E, R>,
+    ) -> Result<Self> {
+        let (data, header_offset) = image.image_data_and_offset()?;
+        let header = Mach::parse(data, header_offset)?;
+        let endian = header.endian()?;
+
+        // Build a list of sections to make some operations more efficient.
+        // Also build a list of segments, because we need to remember which ReadRef
+        // to read each section's data from. Only the DyldCache knows this information,
+        // and we won't have access to it once we've exited this function.
+        let mut segments = Vec::new();
+        let mut sections = Vec::new();
+        let mut linkedit_data: Option<R> = None;
+        let mut symtab = None;
+        if let Ok(mut commands) = header.load_commands(endian, data, header_offset) {
+            while let Ok(Some(command)) = commands.next() {
+                if let Some((segment, section_data)) = Mach::Segment::from_command(command)? {
+                    // Each segment can be stored in a different subcache. Get the segment's
+                    // address and look it up in the cache mappings, to find the correct cache data.
+                    let addr = segment.vmaddr(endian).into();
+                    let (data, _offset) = image
+                        .cache
+                        .data_and_offset_for_address(addr)
+                        .read_error("Could not find segment data in dyld shared cache")?;
+                    if segment.name() == macho::SEG_LINKEDIT.as_bytes() {
+                        linkedit_data = Some(data);
+                    }
+                    let segment_index = segments.len();
+                    segments.push(MachOSegmentInternal { segment, data });
+
+                    for section in segment.sections(endian, section_data)? {
+                        let index = SectionIndex(sections.len() + 1);
+                        sections.push(MachOSectionInternal::parse(index, segment_index, section));
+                    }
+                } else if let Some(st) = command.symtab()? {
+                    symtab = Some(st);
+                }
+            }
+        }
+
+        // The symbols are found in the __LINKEDIT segment, so make sure to read them from the
+        // correct subcache.
+        let symbols = match (symtab, linkedit_data) {
+            (Some(symtab), Some(linkedit_data)) => symtab.symbols(endian, linkedit_data)?,
+            _ => SymbolTable::default(),
+        };
+
+        Ok(MachOFile {
+            endian,
+            data,
+            header_offset,
+            header,
+            segments,
+            sections,
+            symbols,
+        })
+    }
+
+    /// Return the section at the given index.
+    #[inline]
+    pub(super) fn section_internal(
+        &self,
+        index: SectionIndex,
+    ) -> Result<&MachOSectionInternal<'data, Mach>> {
+        index
+            .0
+            .checked_sub(1)
+            .and_then(|index| self.sections.get(index))
+            .read_error("Invalid Mach-O section index")
+    }
+
+    pub(super) fn segment_internal(
+        &self,
+        index: usize,
+    ) -> Result<&MachOSegmentInternal<'data, Mach, R>> {
+        self.segments
+            .get(index)
+            .read_error("Invalid Mach-O segment index")
+    }
+}
+
+impl<'data, Mach, R> read::private::Sealed for MachOFile<'data, Mach, R>
+where
+    Mach: MachHeader,
+    R: ReadRef<'data>,
+{
+}
+
+impl<'data, 'file, Mach, R> Object<'data, 'file> for MachOFile<'data, Mach, R>
+where
+    'data: 'file,
+    Mach: MachHeader,
+    R: 'file + ReadRef<'data>,
+{
+    type Segment = MachOSegment<'data, 'file, Mach, R>;
+    type SegmentIterator = MachOSegmentIterator<'data, 'file, Mach, R>;
+    type Section = MachOSection<'data, 'file, Mach, R>;
+    type SectionIterator = MachOSectionIterator<'data, 'file, Mach, R>;
+    type Comdat = MachOComdat<'data, 'file, Mach, R>;
+    type ComdatIterator = MachOComdatIterator<'data, 'file, Mach, R>;
+    type Symbol = MachOSymbol<'data, 'file, Mach, R>;
+    type SymbolIterator = MachOSymbolIterator<'data, 'file, Mach, R>;
+    type SymbolTable = MachOSymbolTable<'data, 'file, Mach, R>;
+    type DynamicRelocationIterator = NoDynamicRelocationIterator;
+
+    fn architecture(&self) -> Architecture {
+        match self.header.cputype(self.endian) {
+            macho::CPU_TYPE_ARM => Architecture::Arm,
+            macho::CPU_TYPE_ARM64 => Architecture::Aarch64,
+            macho::CPU_TYPE_X86 => Architecture::I386,
+            macho::CPU_TYPE_X86_64 => Architecture::X86_64,
+            macho::CPU_TYPE_MIPS => Architecture::Mips,
+            macho::CPU_TYPE_POWERPC => Architecture::PowerPc,
+            macho::CPU_TYPE_POWERPC64 => Architecture::PowerPc64,
+            _ => Architecture::Unknown,
+        }
+    }
+
+    #[inline]
+    fn is_little_endian(&self) -> bool {
+        self.header.is_little_endian()
+    }
+
+    #[inline]
+    fn is_64(&self) -> bool {
+        self.header.is_type_64()
+    }
+
+    fn kind(&self) -> ObjectKind {
+        match self.header.filetype(self.endian) {
+            macho::MH_OBJECT => ObjectKind::Relocatable,
+            macho::MH_EXECUTE => ObjectKind::Executable,
+            macho::MH_CORE => ObjectKind::Core,
+            macho::MH_DYLIB => ObjectKind::Dynamic,
+            _ => ObjectKind::Unknown,
+        }
+    }
+
+    fn segments(&'file self) -> MachOSegmentIterator<'data, 'file, Mach, R> {
+        MachOSegmentIterator {
+            file: self,
+            iter: self.segments.iter(),
+        }
+    }
+
+    fn section_by_name_bytes(
+        &'file self,
+        section_name: &[u8],
+    ) -> Option<MachOSection<'data, 'file, Mach, R>> {
+        // Translate the "." prefix to the "__" prefix used by OSX/Mach-O, eg
+        // ".debug_info" to "__debug_info", and limit to 16 bytes total.
+        let system_name = if section_name.starts_with(b".") {
+            if section_name.len() > 15 {
+                Some(&section_name[1..15])
+            } else {
+                Some(&section_name[1..])
+            }
+        } else {
+            None
+        };
+        let cmp_section_name = |section: &MachOSection<'data, 'file, Mach, R>| {
+            section
+                .name_bytes()
+                .map(|name| {
+                    section_name == name
+                        || system_name
+                            .filter(|system_name| {
+                                name.starts_with(b"__") && name[2..] == **system_name
+                            })
+                            .is_some()
+                })
+                .unwrap_or(false)
+        };
+
+        self.sections().find(cmp_section_name)
+    }
+
+    fn section_by_index(
+        &'file self,
+        index: SectionIndex,
+    ) -> Result<MachOSection<'data, 'file, Mach, R>> {
+        let internal = *self.section_internal(index)?;
+        Ok(MachOSection {
+            file: self,
+            internal,
+        })
+    }
+
+    fn sections(&'file self) -> MachOSectionIterator<'data, 'file, Mach, R> {
+        MachOSectionIterator {
+            file: self,
+            iter: self.sections.iter(),
+        }
+    }
+
+    fn comdats(&'file self) -> MachOComdatIterator<'data, 'file, Mach, R> {
+        MachOComdatIterator { file: self }
+    }
+
+    fn symbol_by_index(
+        &'file self,
+        index: SymbolIndex,
+    ) -> Result<MachOSymbol<'data, 'file, Mach, R>> {
+        let nlist = self.symbols.symbol(index.0)?;
+        MachOSymbol::new(self, index, nlist).read_error("Unsupported Mach-O symbol index")
+    }
+
+    fn symbols(&'file self) -> MachOSymbolIterator<'data, 'file, Mach, R> {
+        MachOSymbolIterator {
+            file: self,
+            index: 0,
+        }
+    }
+
+    #[inline]
+    fn symbol_table(&'file self) -> Option<MachOSymbolTable<'data, 'file, Mach, R>> {
+        Some(MachOSymbolTable { file: self })
+    }
+
+    fn dynamic_symbols(&'file self) -> MachOSymbolIterator<'data, 'file, Mach, R> {
+        MachOSymbolIterator {
+            file: self,
+            index: self.symbols.len(),
+        }
+    }
+
+    #[inline]
+    fn dynamic_symbol_table(&'file self) -> Option<MachOSymbolTable<'data, 'file, Mach, R>> {
+        None
+    }
+
+    fn object_map(&'file self) -> ObjectMap<'data> {
+        self.symbols.object_map(self.endian)
+    }
+
+    fn imports(&self) -> Result<Vec<Import<'data>>> {
+        let mut dysymtab = None;
+        let mut libraries = Vec::new();
+        let twolevel = self.header.flags(self.endian) & macho::MH_TWOLEVEL != 0;
+        if twolevel {
+            libraries.push(&[][..]);
+        }
+        let mut commands = self
+            .header
+            .load_commands(self.endian, self.data, self.header_offset)?;
+        while let Some(command) = commands.next()? {
+            if let Some(command) = command.dysymtab()? {
+                dysymtab = Some(command);
+            }
+            if twolevel {
+                if let Some(dylib) = command.dylib()? {
+                    libraries.push(command.string(self.endian, dylib.dylib.name)?);
+                }
+            }
+        }
+
+        let mut imports = Vec::new();
+        if let Some(dysymtab) = dysymtab {
+            let index = dysymtab.iundefsym.get(self.endian) as usize;
+            let number = dysymtab.nundefsym.get(self.endian) as usize;
+            for i in index..(index.wrapping_add(number)) {
+                let symbol = self.symbols.symbol(i)?;
+                let name = symbol.name(self.endian, self.symbols.strings())?;
+                let library = if twolevel {
+                    libraries
+                        .get(symbol.library_ordinal(self.endian) as usize)
+                        .copied()
+                        .read_error("Invalid Mach-O symbol library ordinal")?
+                } else {
+                    &[]
+                };
+                imports.push(Import {
+                    name: ByteString(name),
+                    library: ByteString(library),
+                });
+            }
+        }
+        Ok(imports)
+    }
+
+    fn exports(&self) -> Result<Vec<Export<'data>>> {
+        let mut dysymtab = None;
+        let mut commands = self
+            .header
+            .load_commands(self.endian, self.data, self.header_offset)?;
+        while let Some(command) = commands.next()? {
+            if let Some(command) = command.dysymtab()? {
+                dysymtab = Some(command);
+                break;
+            }
+        }
+
+        let mut exports = Vec::new();
+        if let Some(dysymtab) = dysymtab {
+            let index = dysymtab.iextdefsym.get(self.endian) as usize;
+            let number = dysymtab.nextdefsym.get(self.endian) as usize;
+            for i in index..(index.wrapping_add(number)) {
+                let symbol = self.symbols.symbol(i)?;
+                let name = symbol.name(self.endian, self.symbols.strings())?;
+                let address = symbol.n_value(self.endian).into();
+                exports.push(Export {
+                    name: ByteString(name),
+                    address,
+                });
+            }
+        }
+        Ok(exports)
+    }
+
+    #[inline]
+    fn dynamic_relocations(&'file self) -> Option<NoDynamicRelocationIterator> {
+        None
+    }
+
+    fn has_debug_symbols(&self) -> bool {
+        self.section_by_name(".debug_info").is_some()
+    }
+
+    fn mach_uuid(&self) -> Result<Option<[u8; 16]>> {
+        self.header.uuid(self.endian, self.data, self.header_offset)
+    }
+
+    fn relative_address_base(&self) -> u64 {
+        0
+    }
+
+    fn entry(&self) -> u64 {
+        if let Ok(mut commands) =
+            self.header
+                .load_commands(self.endian, self.data, self.header_offset)
+        {
+            while let Ok(Some(command)) = commands.next() {
+                if let Ok(Some(command)) = command.entry_point() {
+                    return command.entryoff.get(self.endian);
+                }
+            }
+        }
+        0
+    }
+
+    fn flags(&self) -> FileFlags {
+        FileFlags::MachO {
+            flags: self.header.flags(self.endian),
+        }
+    }
+}
+
+/// An iterator over the COMDAT section groups of a `MachOFile64`.
+pub type MachOComdatIterator32<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    MachOComdatIterator<'data, 'file, macho::MachHeader32<Endian>, R>;
+/// An iterator over the COMDAT section groups of a `MachOFile64`.
+pub type MachOComdatIterator64<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    MachOComdatIterator<'data, 'file, macho::MachHeader64<Endian>, R>;
+
+/// An iterator over the COMDAT section groups of a `MachOFile`.
+#[derive(Debug)]
+pub struct MachOComdatIterator<'data, 'file, Mach, R = &'data [u8]>
+where
+    Mach: MachHeader,
+    R: ReadRef<'data>,
+{
+    #[allow(unused)]
+    file: &'file MachOFile<'data, Mach, R>,
+}
+
+impl<'data, 'file, Mach, R> Iterator for MachOComdatIterator<'data, 'file, Mach, R>
+where
+    Mach: MachHeader,
+    R: ReadRef<'data>,
+{
+    type Item = MachOComdat<'data, 'file, Mach, R>;
+
+    #[inline]
+    fn next(&mut self) -> Option<Self::Item> {
+        None
+    }
+}
+
+/// A COMDAT section group of a `MachOFile32`.
+pub type MachOComdat32<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    MachOComdat<'data, 'file, macho::MachHeader32<Endian>, R>;
+
+/// A COMDAT section group of a `MachOFile64`.
+pub type MachOComdat64<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    MachOComdat<'data, 'file, macho::MachHeader64<Endian>, R>;
+
+/// A COMDAT section group of a `MachOFile`.
+#[derive(Debug)]
+pub struct MachOComdat<'data, 'file, Mach, R = &'data [u8]>
+where
+    Mach: MachHeader,
+    R: ReadRef<'data>,
+{
+    #[allow(unused)]
+    file: &'file MachOFile<'data, Mach, R>,
+}
+
+impl<'data, 'file, Mach, R> read::private::Sealed for MachOComdat<'data, 'file, Mach, R>
+where
+    Mach: MachHeader,
+    R: ReadRef<'data>,
+{
+}
+
+impl<'data, 'file, Mach, R> ObjectComdat<'data> for MachOComdat<'data, 'file, Mach, R>
+where
+    Mach: MachHeader,
+    R: ReadRef<'data>,
+{
+    type SectionIterator = MachOComdatSectionIterator<'data, 'file, Mach, R>;
+
+    #[inline]
+    fn kind(&self) -> ComdatKind {
+        unreachable!();
+    }
+
+    #[inline]
+    fn symbol(&self) -> SymbolIndex {
+        unreachable!();
+    }
+
+    #[inline]
+    fn name_bytes(&self) -> Result<&[u8]> {
+        unreachable!();
+    }
+
+    #[inline]
+    fn name(&self) -> Result<&str> {
+        unreachable!();
+    }
+
+    #[inline]
+    fn sections(&self) -> Self::SectionIterator {
+        unreachable!();
+    }
+}
+
+/// An iterator over the sections in a COMDAT section group of a `MachOFile32`.
+pub type MachOComdatSectionIterator32<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    MachOComdatSectionIterator<'data, 'file, macho::MachHeader32<Endian>, R>;
+/// An iterator over the sections in a COMDAT section group of a `MachOFile64`.
+pub type MachOComdatSectionIterator64<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    MachOComdatSectionIterator<'data, 'file, macho::MachHeader64<Endian>, R>;
+
+/// An iterator over the sections in a COMDAT section group of a `MachOFile`.
+#[derive(Debug)]
+pub struct MachOComdatSectionIterator<'data, 'file, Mach, R = &'data [u8]>
+where
+    'data: 'file,
+    Mach: MachHeader,
+    R: ReadRef<'data>,
+{
+    #[allow(unused)]
+    file: &'file MachOFile<'data, Mach, R>,
+}
+
+impl<'data, 'file, Mach, R> Iterator for MachOComdatSectionIterator<'data, 'file, Mach, R>
+where
+    Mach: MachHeader,
+    R: ReadRef<'data>,
+{
+    type Item = SectionIndex;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        None
+    }
+}
+
+/// A trait for generic access to `MachHeader32` and `MachHeader64`.
+#[allow(missing_docs)]
+pub trait MachHeader: Debug + Pod {
+    type Word: Into<u64>;
+    type Endian: endian::Endian;
+    type Segment: Segment<Endian = Self::Endian, Section = Self::Section>;
+    type Section: Section<Endian = Self::Endian>;
+    type Nlist: Nlist<Endian = Self::Endian>;
+
+    /// Return true if this type is a 64-bit header.
+    ///
+    /// This is a property of the type, not a value in the header data.
+    fn is_type_64(&self) -> bool;
+
+    /// Return true if the `magic` field signifies big-endian.
+    fn is_big_endian(&self) -> bool;
+
+    /// Return true if the `magic` field signifies little-endian.
+    fn is_little_endian(&self) -> bool;
+
+    fn magic(&self) -> u32;
+    fn cputype(&self, endian: Self::Endian) -> u32;
+    fn cpusubtype(&self, endian: Self::Endian) -> u32;
+    fn filetype(&self, endian: Self::Endian) -> u32;
+    fn ncmds(&self, endian: Self::Endian) -> u32;
+    fn sizeofcmds(&self, endian: Self::Endian) -> u32;
+    fn flags(&self, endian: Self::Endian) -> u32;
+
+    // Provided methods.
+
+    /// Read the file header.
+    ///
+    /// Also checks that the magic field in the file header is a supported format.
+    fn parse<'data, R: ReadRef<'data>>(data: R, offset: u64) -> read::Result<&'data Self> {
+        let header = data
+            .read_at::<Self>(offset)
+            .read_error("Invalid Mach-O header size or alignment")?;
+        if !header.is_supported() {
+            return Err(Error("Unsupported Mach-O header"));
+        }
+        Ok(header)
+    }
+
+    fn is_supported(&self) -> bool {
+        self.is_little_endian() || self.is_big_endian()
+    }
+
+    fn endian(&self) -> Result<Self::Endian> {
+        Self::Endian::from_big_endian(self.is_big_endian()).read_error("Unsupported Mach-O endian")
+    }
+
+    fn load_commands<'data, R: ReadRef<'data>>(
+        &self,
+        endian: Self::Endian,
+        data: R,
+        header_offset: u64,
+    ) -> Result<LoadCommandIterator<'data, Self::Endian>> {
+        let data = data
+            .read_bytes_at(
+                header_offset + mem::size_of::<Self>() as u64,
+                self.sizeofcmds(endian).into(),
+            )
+            .read_error("Invalid Mach-O load command table size")?;
+        Ok(LoadCommandIterator::new(endian, data, self.ncmds(endian)))
+    }
+
+    /// Return the UUID from the `LC_UUID` load command, if one is present.
+    fn uuid<'data, R: ReadRef<'data>>(
+        &self,
+        endian: Self::Endian,
+        data: R,
+        header_offset: u64,
+    ) -> Result<Option<[u8; 16]>> {
+        let mut commands = self.load_commands(endian, data, header_offset)?;
+        while let Some(command) = commands.next()? {
+            if let Ok(Some(uuid)) = command.uuid() {
+                return Ok(Some(uuid.uuid));
+            }
+        }
+        Ok(None)
+    }
+}
+
+impl<Endian: endian::Endian> MachHeader for macho::MachHeader32<Endian> {
+    type Word = u32;
+    type Endian = Endian;
+    type Segment = macho::SegmentCommand32<Endian>;
+    type Section = macho::Section32<Endian>;
+    type Nlist = macho::Nlist32<Endian>;
+
+    fn is_type_64(&self) -> bool {
+        false
+    }
+
+    fn is_big_endian(&self) -> bool {
+        self.magic() == macho::MH_MAGIC
+    }
+
+    fn is_little_endian(&self) -> bool {
+        self.magic() == macho::MH_CIGAM
+    }
+
+    fn magic(&self) -> u32 {
+        self.magic.get(BigEndian)
+    }
+
+    fn cputype(&self, endian: Self::Endian) -> u32 {
+        self.cputype.get(endian)
+    }
+
+    fn cpusubtype(&self, endian: Self::Endian) -> u32 {
+        self.cpusubtype.get(endian)
+    }
+
+    fn filetype(&self, endian: Self::Endian) -> u32 {
+        self.filetype.get(endian)
+    }
+
+    fn ncmds(&self, endian: Self::Endian) -> u32 {
+        self.ncmds.get(endian)
+    }
+
+    fn sizeofcmds(&self, endian: Self::Endian) -> u32 {
+        self.sizeofcmds.get(endian)
+    }
+
+    fn flags(&self, endian: Self::Endian) -> u32 {
+        self.flags.get(endian)
+    }
+}
+
+impl<Endian: endian::Endian> MachHeader for macho::MachHeader64<Endian> {
+    type Word = u64;
+    type Endian = Endian;
+    type Segment = macho::SegmentCommand64<Endian>;
+    type Section = macho::Section64<Endian>;
+    type Nlist = macho::Nlist64<Endian>;
+
+    fn is_type_64(&self) -> bool {
+        true
+    }
+
+    fn is_big_endian(&self) -> bool {
+        self.magic() == macho::MH_MAGIC_64
+    }
+
+    fn is_little_endian(&self) -> bool {
+        self.magic() == macho::MH_CIGAM_64
+    }
+
+    fn magic(&self) -> u32 {
+        self.magic.get(BigEndian)
+    }
+
+    fn cputype(&self, endian: Self::Endian) -> u32 {
+        self.cputype.get(endian)
+    }
+
+    fn cpusubtype(&self, endian: Self::Endian) -> u32 {
+        self.cpusubtype.get(endian)
+    }
+
+    fn filetype(&self, endian: Self::Endian) -> u32 {
+        self.filetype.get(endian)
+    }
+
+    fn ncmds(&self, endian: Self::Endian) -> u32 {
+        self.ncmds.get(endian)
+    }
+
+    fn sizeofcmds(&self, endian: Self::Endian) -> u32 {
+        self.sizeofcmds.get(endian)
+    }
+
+    fn flags(&self, endian: Self::Endian) -> u32 {
+        self.flags.get(endian)
+    }
+}
diff --git a/third_party/rust/object/src/read/macho/load_command.rs b/third_party/rust/object/src/read/macho/load_command.rs
new file mode 100644
index 0000000000..10daf4ed10
--- /dev/null
+++ b/third_party/rust/object/src/read/macho/load_command.rs
@@ -0,0 +1,353 @@
+use core::marker::PhantomData;
+
+use crate::endian::Endian;
+use crate::macho;
+use crate::pod::Pod;
+use crate::read::macho::{MachHeader, SymbolTable};
+use crate::read::{Bytes, ReadError, ReadRef, Result, StringTable};
+
+/// An iterator over the load commands of a `MachHeader`.
+#[derive(Debug, Default, Clone, Copy)]
+pub struct LoadCommandIterator<'data, E: Endian> {
+    endian: E,
+    data: Bytes<'data>,
+    ncmds: u32,
+}
+
+impl<'data, E: Endian> LoadCommandIterator<'data, E> {
+    pub(super) fn new(endian: E, data: &'data [u8], ncmds: u32) -> Self {
+        LoadCommandIterator {
+            endian,
+            data: Bytes(data),
+            ncmds,
+        }
+    }
+
+    /// Return the next load command.
+    pub fn next(&mut self) -> Result<Option<LoadCommandData<'data, E>>> {
+        if self.ncmds == 0 {
+            return Ok(None);
+        }
+        let header = self
+            .data
+            .read_at::<macho::LoadCommand<E>>(0)
+            .read_error("Invalid Mach-O load command header")?;
+        let cmd = header.cmd.get(self.endian);
+        let cmdsize = header.cmdsize.get(self.endian) as usize;
+        let data = self
+            .data
+            .read_bytes(cmdsize)
+            .read_error("Invalid Mach-O load command size")?;
+        self.ncmds -= 1;
+        Ok(Some(LoadCommandData {
+            cmd,
+            data,
+            marker: Default::default(),
+        }))
+    }
+}
+
+/// The data for a `LoadCommand`.
+#[derive(Debug, Clone, Copy)]
+pub struct LoadCommandData<'data, E: Endian> {
+    cmd: u32,
+    // Includes the header.
+    data: Bytes<'data>,
+    marker: PhantomData<E>,
+}
+
+impl<'data, E: Endian> LoadCommandData<'data, E> {
+    /// Return the `cmd` field of the `LoadCommand`.
+    ///
+    /// This is one of the `LC_` constants.
+    pub fn cmd(&self) -> u32 {
+        self.cmd
+    }
+
+    /// Return the `cmdsize` field of the `LoadCommand`.
+    pub fn cmdsize(&self) -> u32 {
+        self.data.len() as u32
+    }
+
+    /// Parse the data as the given type.
+    #[inline]
+    pub fn data<T: Pod>(&self) -> Result<&'data T> {
+        self.data
+            .read_at(0)
+            .read_error("Invalid Mach-O command size")
+    }
+
+    /// Raw bytes of this LoadCommand structure.
+    pub fn raw_data(&self) -> &'data [u8] {
+        self.data.0
+    }
+
+    /// Parse a load command string value.
+    ///
+    /// Strings used by load commands are specified by offsets that are
+    /// relative to the load command header.
+    pub fn string(&self, endian: E, s: macho::LcStr<E>) -> Result<&'data [u8]> {
+        self.data
+            .read_string_at(s.offset.get(endian) as usize)
+            .read_error("Invalid load command string offset")
+    }
+
+    /// Parse the command data according to the `cmd` field.
+    pub fn variant(&self) -> Result<LoadCommandVariant<'data, E>> {
+        Ok(match self.cmd {
+            macho::LC_SEGMENT => {
+                let mut data = self.data;
+                let segment = data.read().read_error("Invalid Mach-O command size")?;
+                LoadCommandVariant::Segment32(segment, data.0)
+            }
+            macho::LC_SYMTAB => LoadCommandVariant::Symtab(self.data()?),
+            macho::LC_THREAD | macho::LC_UNIXTHREAD => {
+                let mut data = self.data;
+                let thread = data.read().read_error("Invalid Mach-O command size")?;
+                LoadCommandVariant::Thread(thread, data.0)
+            }
+            macho::LC_DYSYMTAB => LoadCommandVariant::Dysymtab(self.data()?),
+            macho::LC_LOAD_DYLIB
+            | macho::LC_LOAD_WEAK_DYLIB
+            | macho::LC_REEXPORT_DYLIB
+            | macho::LC_LAZY_LOAD_DYLIB
+            | macho::LC_LOAD_UPWARD_DYLIB => LoadCommandVariant::Dylib(self.data()?),
+            macho::LC_ID_DYLIB => LoadCommandVariant::IdDylib(self.data()?),
+            macho::LC_LOAD_DYLINKER => LoadCommandVariant::LoadDylinker(self.data()?),
+            macho::LC_ID_DYLINKER => LoadCommandVariant::IdDylinker(self.data()?),
+            macho::LC_PREBOUND_DYLIB => LoadCommandVariant::PreboundDylib(self.data()?),
+            macho::LC_ROUTINES => LoadCommandVariant::Routines32(self.data()?),
+            macho::LC_SUB_FRAMEWORK => LoadCommandVariant::SubFramework(self.data()?),
+            macho::LC_SUB_UMBRELLA => LoadCommandVariant::SubUmbrella(self.data()?),
+            macho::LC_SUB_CLIENT => LoadCommandVariant::SubClient(self.data()?),
+            macho::LC_SUB_LIBRARY => LoadCommandVariant::SubLibrary(self.data()?),
+            macho::LC_TWOLEVEL_HINTS => LoadCommandVariant::TwolevelHints(self.data()?),
+            macho::LC_PREBIND_CKSUM => LoadCommandVariant::PrebindCksum(self.data()?),
+            macho::LC_SEGMENT_64 => {
+                let mut data = self.data;
+                let segment = data.read().read_error("Invalid Mach-O command size")?;
+                LoadCommandVariant::Segment64(segment, data.0)
+            }
+            macho::LC_ROUTINES_64 => LoadCommandVariant::Routines64(self.data()?),
+            macho::LC_UUID => LoadCommandVariant::Uuid(self.data()?),
+            macho::LC_RPATH => LoadCommandVariant::Rpath(self.data()?),
+            macho::LC_CODE_SIGNATURE
+            | macho::LC_SEGMENT_SPLIT_INFO
+            | macho::LC_FUNCTION_STARTS
+            | macho::LC_DATA_IN_CODE
+            | macho::LC_DYLIB_CODE_SIGN_DRS
+            | macho::LC_LINKER_OPTIMIZATION_HINT
+            | macho::LC_DYLD_EXPORTS_TRIE
+            | macho::LC_DYLD_CHAINED_FIXUPS => LoadCommandVariant::LinkeditData(self.data()?),
+            macho::LC_ENCRYPTION_INFO => LoadCommandVariant::EncryptionInfo32(self.data()?),
+            macho::LC_DYLD_INFO | macho::LC_DYLD_INFO_ONLY => {
+                LoadCommandVariant::DyldInfo(self.data()?)
+            }
+            macho::LC_VERSION_MIN_MACOSX
+            | macho::LC_VERSION_MIN_IPHONEOS
+            | macho::LC_VERSION_MIN_TVOS
+            | macho::LC_VERSION_MIN_WATCHOS => LoadCommandVariant::VersionMin(self.data()?),
+            macho::LC_DYLD_ENVIRONMENT => LoadCommandVariant::DyldEnvironment(self.data()?),
+            macho::LC_MAIN => LoadCommandVariant::EntryPoint(self.data()?),
+            macho::LC_SOURCE_VERSION => LoadCommandVariant::SourceVersion(self.data()?),
+            macho::LC_ENCRYPTION_INFO_64 => LoadCommandVariant::EncryptionInfo64(self.data()?),
+            macho::LC_LINKER_OPTION => LoadCommandVariant::LinkerOption(self.data()?),
+            macho::LC_NOTE => LoadCommandVariant::Note(self.data()?),
+            macho::LC_BUILD_VERSION => LoadCommandVariant::BuildVersion(self.data()?),
+            macho::LC_FILESET_ENTRY => LoadCommandVariant::FilesetEntry(self.data()?),
+            _ => LoadCommandVariant::Other,
+        })
+    }
+
+    /// Try to parse this command as a `SegmentCommand32`.
+    ///
+    /// Returns the segment command and the data containing the sections.
+    pub fn segment_32(self) -> Result<Option<(&'data macho::SegmentCommand32<E>, &'data [u8])>> {
+        if self.cmd == macho::LC_SEGMENT {
+            let mut data = self.data;
+            let segment = data.read().read_error("Invalid Mach-O command size")?;
+            Ok(Some((segment, data.0)))
+        } else {
+            Ok(None)
+        }
+    }
+
+    /// Try to parse this command as a `SymtabCommand`.
+    ///
+    /// Returns the segment command and the data containing the sections.
+    pub fn symtab(self) -> Result<Option<&'data macho::SymtabCommand<E>>> {
+        if self.cmd == macho::LC_SYMTAB {
+            Some(self.data()).transpose()
+        } else {
+            Ok(None)
+        }
+    }
+
+    /// Try to parse this command as a `DysymtabCommand`.
+    pub fn dysymtab(self) -> Result<Option<&'data macho::DysymtabCommand<E>>> {
+        if self.cmd == macho::LC_DYSYMTAB {
+            Some(self.data()).transpose()
+        } else {
+            Ok(None)
+        }
+    }
+
+    /// Try to parse this command as a `DylibCommand`.
+    pub fn dylib(self) -> Result<Option<&'data macho::DylibCommand<E>>> {
+        if self.cmd == macho::LC_LOAD_DYLIB
+            || self.cmd == macho::LC_LOAD_WEAK_DYLIB
+            || self.cmd == macho::LC_REEXPORT_DYLIB
+            || self.cmd == macho::LC_LAZY_LOAD_DYLIB
+            || self.cmd == macho::LC_LOAD_UPWARD_DYLIB
+        {
+            Some(self.data()).transpose()
+        } else {
+            Ok(None)
+        }
+    }
+
+    /// Try to parse this command as a `UuidCommand`.
+    pub fn uuid(self) -> Result<Option<&'data macho::UuidCommand<E>>> {
+        if self.cmd == macho::LC_UUID {
+            Some(self.data()).transpose()
+        } else {
+            Ok(None)
+        }
+    }
+
+    /// Try to parse this command as a `SegmentCommand64`.
+    pub fn segment_64(self) -> Result<Option<(&'data macho::SegmentCommand64<E>, &'data [u8])>> {
+        if self.cmd == macho::LC_SEGMENT_64 {
+            let mut data = self.data;
+            let command = data.read().read_error("Invalid Mach-O command size")?;
+            Ok(Some((command, data.0)))
+        } else {
+            Ok(None)
+        }
+    }
+
+    /// Try to parse this command as a `DyldInfoCommand`.
+    pub fn dyld_info(self) -> Result<Option<&'data macho::DyldInfoCommand<E>>> {
+        if self.cmd == macho::LC_DYLD_INFO || self.cmd == macho::LC_DYLD_INFO_ONLY {
+            Some(self.data()).transpose()
+        } else {
+            Ok(None)
+        }
+    }
+
+    /// Try to parse this command as an `EntryPointCommand`.
+    pub fn entry_point(self) -> Result<Option<&'data macho::EntryPointCommand<E>>> {
+        if self.cmd == macho::LC_MAIN {
+            Some(self.data()).transpose()
+        } else {
+            Ok(None)
+        }
+    }
+}
+
+/// A `LoadCommand` that has been interpreted according to its `cmd` field.
+#[derive(Debug, Clone, Copy)]
+#[non_exhaustive]
+pub enum LoadCommandVariant<'data, E: Endian> {
+    /// `LC_SEGMENT`
+    Segment32(&'data macho::SegmentCommand32<E>, &'data [u8]),
+    /// `LC_SYMTAB`
+    Symtab(&'data macho::SymtabCommand<E>),
+    // obsolete: `LC_SYMSEG`
+    //Symseg(&'data macho::SymsegCommand<E>),
+    /// `LC_THREAD` or `LC_UNIXTHREAD`
+    Thread(&'data macho::ThreadCommand<E>, &'data [u8]),
+    // obsolete: `LC_IDFVMLIB` or `LC_LOADFVMLIB`
+    //Fvmlib(&'data macho::FvmlibCommand<E>),
+    // obsolete: `LC_IDENT`
+    //Ident(&'data macho::IdentCommand<E>),
+    // internal: `LC_FVMFILE`
+    //Fvmfile(&'data macho::FvmfileCommand<E>),
+    // internal: `LC_PREPAGE`
+    /// `LC_DYSYMTAB`
+    Dysymtab(&'data macho::DysymtabCommand<E>),
+    /// `LC_LOAD_DYLIB`, `LC_LOAD_WEAK_DYLIB`, `LC_REEXPORT_DYLIB`,
+    /// `LC_LAZY_LOAD_DYLIB`, or `LC_LOAD_UPWARD_DYLIB`
+    Dylib(&'data macho::DylibCommand<E>),
+    /// `LC_ID_DYLIB`
+    IdDylib(&'data macho::DylibCommand<E>),
+    /// `LC_LOAD_DYLINKER`
+    LoadDylinker(&'data macho::DylinkerCommand<E>),
+    /// `LC_ID_DYLINKER`
+    IdDylinker(&'data macho::DylinkerCommand<E>),
+    /// `LC_PREBOUND_DYLIB`
+    PreboundDylib(&'data macho::PreboundDylibCommand<E>),
+    /// `LC_ROUTINES`
+    Routines32(&'data macho::RoutinesCommand32<E>),
+    /// `LC_SUB_FRAMEWORK`
+    SubFramework(&'data macho::SubFrameworkCommand<E>),
+    /// `LC_SUB_UMBRELLA`
+    SubUmbrella(&'data macho::SubUmbrellaCommand<E>),
+    /// `LC_SUB_CLIENT`
+    SubClient(&'data macho::SubClientCommand<E>),
+    /// `LC_SUB_LIBRARY`
+    SubLibrary(&'data macho::SubLibraryCommand<E>),
+    /// `LC_TWOLEVEL_HINTS`
+    TwolevelHints(&'data macho::TwolevelHintsCommand<E>),
+    /// `LC_PREBIND_CKSUM`
+    PrebindCksum(&'data macho::PrebindCksumCommand<E>),
+    /// `LC_SEGMENT_64`
+    Segment64(&'data macho::SegmentCommand64<E>, &'data [u8]),
+    /// `LC_ROUTINES_64`
+    Routines64(&'data macho::RoutinesCommand64<E>),
+    /// `LC_UUID`
+    Uuid(&'data macho::UuidCommand<E>),
+    /// `LC_RPATH`
+    Rpath(&'data macho::RpathCommand<E>),
+    /// `LC_CODE_SIGNATURE`, `LC_SEGMENT_SPLIT_INFO`, `LC_FUNCTION_STARTS`,
+    /// `LC_DATA_IN_CODE`, `LC_DYLIB_CODE_SIGN_DRS`, `LC_LINKER_OPTIMIZATION_HINT`,
+    /// `LC_DYLD_EXPORTS_TRIE`, or `LC_DYLD_CHAINED_FIXUPS`.
+    LinkeditData(&'data macho::LinkeditDataCommand<E>),
+    /// `LC_ENCRYPTION_INFO`
+    EncryptionInfo32(&'data macho::EncryptionInfoCommand32<E>),
+    /// `LC_DYLD_INFO` or `LC_DYLD_INFO_ONLY`
+    DyldInfo(&'data macho::DyldInfoCommand<E>),
+    /// `LC_VERSION_MIN_MACOSX`, `LC_VERSION_MIN_IPHONEOS`, `LC_VERSION_MIN_WATCHOS`,
+    /// or `LC_VERSION_MIN_TVOS`
+    VersionMin(&'data macho::VersionMinCommand<E>),
+    /// `LC_DYLD_ENVIRONMENT`
+    DyldEnvironment(&'data macho::DylinkerCommand<E>),
+    /// `LC_MAIN`
+    EntryPoint(&'data macho::EntryPointCommand<E>),
+    /// `LC_SOURCE_VERSION`
+    SourceVersion(&'data macho::SourceVersionCommand<E>),
+    /// `LC_ENCRYPTION_INFO_64`
+    EncryptionInfo64(&'data macho::EncryptionInfoCommand64<E>),
+    /// `LC_LINKER_OPTION`
+    LinkerOption(&'data macho::LinkerOptionCommand<E>),
+    /// `LC_NOTE`
+    Note(&'data macho::NoteCommand<E>),
+    /// `LC_BUILD_VERSION`
+    BuildVersion(&'data macho::BuildVersionCommand<E>),
+    /// `LC_FILESET_ENTRY`
+    FilesetEntry(&'data macho::FilesetEntryCommand<E>),
+    /// An unrecognized or obsolete load command.
+    Other,
+}
+
+impl<E: Endian> macho::SymtabCommand<E> {
+    /// Return the symbol table that this command references.
+    pub fn symbols<'data, Mach: MachHeader<Endian = E>, R: ReadRef<'data>>(
+        &self,
+        endian: E,
+        data: R,
+    ) -> Result<SymbolTable<'data, Mach, R>> {
+        let symbols = data
+            .read_slice_at(
+                self.symoff.get(endian).into(),
+                self.nsyms.get(endian) as usize,
+            )
+            .read_error("Invalid Mach-O symbol table offset or size")?;
+        let str_start: u64 = self.stroff.get(endian).into();
+        let str_end = str_start
+            .checked_add(self.strsize.get(endian).into())
+            .read_error("Invalid Mach-O string table length")?;
+        let strings = StringTable::new(data, str_start, str_end);
+        Ok(SymbolTable::new(symbols, strings))
+    }
+}
diff --git a/third_party/rust/object/src/read/macho/mod.rs b/third_party/rust/object/src/read/macho/mod.rs
new file mode 100644
index 0000000000..f07ed581b6
--- /dev/null
+++ b/third_party/rust/object/src/read/macho/mod.rs
@@ -0,0 +1,30 @@
+//! Support for reading Mach-O files.
+//!
+//! Defines traits to abstract over the difference between 32-bit and 64-bit
+//! Mach-O files, and implements read functionality in terms of these traits.
+//!
+//! Also provides `MachOFile` and related types which implement the `Object` trait.
+
+mod dyld_cache;
+pub use dyld_cache::*;
+
+mod fat;
+pub use fat::*;
+
+mod file;
+pub use file::*;
+
+mod load_command;
+pub use load_command::*;
+
+mod segment;
+pub use segment::*;
+
+mod section;
+pub use section::*;
+
+mod symbol;
+pub use symbol::*;
+
+mod relocation;
+pub use relocation::*;
diff --git a/third_party/rust/object/src/read/macho/relocation.rs b/third_party/rust/object/src/read/macho/relocation.rs
new file mode 100644
index 0000000000..5dd7df8966
--- /dev/null
+++ b/third_party/rust/object/src/read/macho/relocation.rs
@@ -0,0 +1,126 @@
+use core::{fmt, slice};
+
+use crate::endian::Endianness;
+use crate::macho;
+use crate::read::{
+    ReadRef, Relocation, RelocationEncoding, RelocationKind, RelocationTarget, SectionIndex,
+    SymbolIndex,
+};
+
+use super::{MachHeader, MachOFile};
+
+/// An iterator over the relocations in a `MachOSection32`.
+pub type MachORelocationIterator32<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    MachORelocationIterator<'data, 'file, macho::MachHeader32<Endian>, R>;
+/// An iterator over the relocations in a `MachOSection64`.
+pub type MachORelocationIterator64<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    MachORelocationIterator<'data, 'file, macho::MachHeader64<Endian>, R>;
+
+/// An iterator over the relocations in a `MachOSection`.
+pub struct MachORelocationIterator<'data, 'file, Mach, R = &'data [u8]>
+where
+    'data: 'file,
+    Mach: MachHeader,
+    R: ReadRef<'data>,
+{
+    pub(super) file: &'file MachOFile<'data, Mach, R>,
+    pub(super) relocations: slice::Iter<'data, macho::Relocation<Mach::Endian>>,
+}
+
+impl<'data, 'file, Mach, R> Iterator for MachORelocationIterator<'data, 'file, Mach, R>
+where
+    Mach: MachHeader,
+    R: ReadRef<'data>,
+{
+    type Item = (u64, Relocation);
+
+    fn next(&mut self) -> Option<Self::Item> {
+        loop {
+            let reloc = self.relocations.next()?;
+            let endian = self.file.endian;
+            let cputype = self.file.header.cputype(endian);
+            if reloc.r_scattered(endian, cputype) {
+                // FIXME: handle scattered relocations
+                // We need to add `RelocationTarget::Address` for this.
+                continue;
+            }
+            let reloc = reloc.info(self.file.endian);
+            let mut encoding = RelocationEncoding::Generic;
+            let kind = match cputype {
+                macho::CPU_TYPE_ARM => match (reloc.r_type, reloc.r_pcrel) {
+                    (macho::ARM_RELOC_VANILLA, false) => RelocationKind::Absolute,
+                    _ => RelocationKind::MachO {
+                        value: reloc.r_type,
+                        relative: reloc.r_pcrel,
+                    },
+                },
+                macho::CPU_TYPE_ARM64 => match (reloc.r_type, reloc.r_pcrel) {
+                    (macho::ARM64_RELOC_UNSIGNED, false) => RelocationKind::Absolute,
+                    _ => RelocationKind::MachO {
+                        value: reloc.r_type,
+                        relative: reloc.r_pcrel,
+                    },
+                },
+                macho::CPU_TYPE_X86 => match (reloc.r_type, reloc.r_pcrel) {
+                    (macho::GENERIC_RELOC_VANILLA, false) => RelocationKind::Absolute,
+                    _ => RelocationKind::MachO {
+                        value: reloc.r_type,
+                        relative: reloc.r_pcrel,
+                    },
+                },
+                macho::CPU_TYPE_X86_64 => match (reloc.r_type, reloc.r_pcrel) {
+                    (macho::X86_64_RELOC_UNSIGNED, false) => RelocationKind::Absolute,
+                    (macho::X86_64_RELOC_SIGNED, true) => {
+                        encoding = RelocationEncoding::X86RipRelative;
+                        RelocationKind::Relative
+                    }
+                    (macho::X86_64_RELOC_BRANCH, true) => {
+                        encoding = RelocationEncoding::X86Branch;
+                        RelocationKind::Relative
+                    }
+                    (macho::X86_64_RELOC_GOT, true) => RelocationKind::GotRelative,
+                    (macho::X86_64_RELOC_GOT_LOAD, true) => {
+                        encoding = RelocationEncoding::X86RipRelativeMovq;
+                        RelocationKind::GotRelative
+                    }
+                    _ => RelocationKind::MachO {
+                        value: reloc.r_type,
+                        relative: reloc.r_pcrel,
+                    },
+                },
+                _ => RelocationKind::MachO {
+                    value: reloc.r_type,
+                    relative: reloc.r_pcrel,
+                },
+            };
+            let size = 8 << reloc.r_length;
+            let target = if reloc.r_extern {
+                RelocationTarget::Symbol(SymbolIndex(reloc.r_symbolnum as usize))
+            } else {
+                RelocationTarget::Section(SectionIndex(reloc.r_symbolnum as usize))
+            };
+            let addend = if reloc.r_pcrel { -4 } else { 0 };
+            return Some((
+                reloc.r_address as u64,
+                Relocation {
+                    kind,
+                    encoding,
+                    size,
+                    target,
+                    addend,
+                    implicit_addend: true,
+                },
+            ));
+        }
+    }
+}
+
+impl<'data, 'file, Mach, R> fmt::Debug for MachORelocationIterator<'data, 'file, Mach, R>
+where
+    Mach: MachHeader,
+    R: ReadRef<'data>,
+{
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("MachORelocationIterator").finish()
+    }
+}
diff --git a/third_party/rust/object/src/read/macho/section.rs b/third_party/rust/object/src/read/macho/section.rs
new file mode 100644
index 0000000000..9e71aa8fd4
--- /dev/null
+++ b/third_party/rust/object/src/read/macho/section.rs
@@ -0,0 +1,384 @@
+use core::fmt::Debug;
+use core::{fmt, result, slice, str};
+
+use crate::endian::{self, Endianness};
+use crate::macho;
+use crate::pod::Pod;
+use crate::read::{
+    self, CompressedData, CompressedFileRange, ObjectSection, ReadError, ReadRef, Result,
+    SectionFlags, SectionIndex, SectionKind,
+};
+
+use super::{MachHeader, MachOFile, MachORelocationIterator};
+
+/// An iterator over the sections of a `MachOFile32`.
+pub type MachOSectionIterator32<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    MachOSectionIterator<'data, 'file, macho::MachHeader32<Endian>, R>;
+/// An iterator over the sections of a `MachOFile64`.
+pub type MachOSectionIterator64<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    MachOSectionIterator<'data, 'file, macho::MachHeader64<Endian>, R>;
+
+/// An iterator over the sections of a `MachOFile`.
+pub struct MachOSectionIterator<'data, 'file, Mach, R = &'data [u8]>
+where
+    'data: 'file,
+    Mach: MachHeader,
+    R: ReadRef<'data>,
+{
+    pub(super) file: &'file MachOFile<'data, Mach, R>,
+    pub(super) iter: slice::Iter<'file, MachOSectionInternal<'data, Mach>>,
+}
+
+impl<'data, 'file, Mach, R> fmt::Debug for MachOSectionIterator<'data, 'file, Mach, R>
+where
+    Mach: MachHeader,
+    R: ReadRef<'data>,
+{
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        // It's painful to do much better than this
+        f.debug_struct("MachOSectionIterator").finish()
+    }
+}
+
+impl<'data, 'file, Mach, R> Iterator for MachOSectionIterator<'data, 'file, Mach, R>
+where
+    Mach: MachHeader,
+    R: ReadRef<'data>,
+{
+    type Item = MachOSection<'data, 'file, Mach, R>;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        self.iter.next().map(|&internal| MachOSection {
+            file: self.file,
+            internal,
+        })
+    }
+}
+
+/// A section of a `MachOFile32`.
+pub type MachOSection32<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    MachOSection<'data, 'file, macho::MachHeader32<Endian>, R>;
+/// A section of a `MachOFile64`.
+pub type MachOSection64<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    MachOSection<'data, 'file, macho::MachHeader64<Endian>, R>;
+
+/// A section of a `MachOFile`.
+#[derive(Debug)]
+pub struct MachOSection<'data, 'file, Mach, R = &'data [u8]>
+where
+    'data: 'file,
+    Mach: MachHeader,
+    R: ReadRef<'data>,
+{
+    pub(super) file: &'file MachOFile<'data, Mach, R>,
+    pub(super) internal: MachOSectionInternal<'data, Mach>,
+}
+
+impl<'data, 'file, Mach, R> MachOSection<'data, 'file, Mach, R>
+where
+    Mach: MachHeader,
+    R: ReadRef<'data>,
+{
+    fn bytes(&self) -> Result<&'data [u8]> {
+        let segment_index = self.internal.segment_index;
+        let segment = self.file.segment_internal(segment_index)?;
+        self.internal
+            .section
+            .data(self.file.endian, segment.data)
+            .read_error("Invalid Mach-O section size or offset")
+    }
+}
+
+impl<'data, 'file, Mach, R> read::private::Sealed for MachOSection<'data, 'file, Mach, R>
+where
+    Mach: MachHeader,
+    R: ReadRef<'data>,
+{
+}
+
+impl<'data, 'file, Mach, R> ObjectSection<'data> for MachOSection<'data, 'file, Mach, R>
+where
+    Mach: MachHeader,
+    R: ReadRef<'data>,
+{
+    type RelocationIterator = MachORelocationIterator<'data, 'file, Mach, R>;
+
+    #[inline]
+    fn index(&self) -> SectionIndex {
+        self.internal.index
+    }
+
+    #[inline]
+    fn address(&self) -> u64 {
+        self.internal.section.addr(self.file.endian).into()
+    }
+
+    #[inline]
+    fn size(&self) -> u64 {
+        self.internal.section.size(self.file.endian).into()
+    }
+
+    #[inline]
+    fn align(&self) -> u64 {
+        1 << self.internal.section.align(self.file.endian)
+    }
+
+    #[inline]
+    fn file_range(&self) -> Option<(u64, u64)> {
+        self.internal.section.file_range(self.file.endian)
+    }
+
+    #[inline]
+    fn data(&self) -> Result<&'data [u8]> {
+        self.bytes()
+    }
+
+    fn data_range(&self, address: u64, size: u64) -> Result<Option<&'data [u8]>> {
+        Ok(read::util::data_range(
+            self.bytes()?,
+            self.address(),
+            address,
+            size,
+        ))
+    }
+
+    #[inline]
+    fn compressed_file_range(&self) -> Result<CompressedFileRange> {
+        Ok(CompressedFileRange::none(self.file_range()))
+    }
+
+    #[inline]
+    fn compressed_data(&self) -> Result<CompressedData<'data>> {
+        self.data().map(CompressedData::none)
+    }
+
+    #[inline]
+    fn name_bytes(&self) -> Result<&[u8]> {
+        Ok(self.internal.section.name())
+    }
+
+    #[inline]
+    fn name(&self) -> Result<&str> {
+        str::from_utf8(self.internal.section.name())
+            .ok()
+            .read_error("Non UTF-8 Mach-O section name")
+    }
+
+    #[inline]
+    fn segment_name_bytes(&self) -> Result<Option<&[u8]>> {
+        Ok(Some(self.internal.section.segment_name()))
+    }
+
+    #[inline]
+    fn segment_name(&self) -> Result<Option<&str>> {
+        Ok(Some(
+            str::from_utf8(self.internal.section.segment_name())
+                .ok()
+                .read_error("Non UTF-8 Mach-O segment name")?,
+        ))
+    }
+
+    fn kind(&self) -> SectionKind {
+        self.internal.kind
+    }
+
+    fn relocations(&self) -> MachORelocationIterator<'data, 'file, Mach, R> {
+        MachORelocationIterator {
+            file: self.file,
+            relocations: self
+                .internal
+                .section
+                .relocations(self.file.endian, self.file.data)
+                .unwrap_or(&[])
+                .iter(),
+        }
+    }
+
+    fn flags(&self) -> SectionFlags {
+        SectionFlags::MachO {
+            flags: self.internal.section.flags(self.file.endian),
+        }
+    }
+}
+
+#[derive(Debug, Clone, Copy)]
+pub(super) struct MachOSectionInternal<'data, Mach: MachHeader> {
+    pub index: SectionIndex,
+    pub segment_index: usize,
+    pub kind: SectionKind,
+    pub section: &'data Mach::Section,
+}
+
+impl<'data, Mach: MachHeader> MachOSectionInternal<'data, Mach> {
+    pub(super) fn parse(
+        index: SectionIndex,
+        segment_index: usize,
+        section: &'data Mach::Section,
+    ) -> Self {
+        // TODO: we don't validate flags, should we?
+        let kind = match (section.segment_name(), section.name()) {
+            (b"__TEXT", b"__text") => SectionKind::Text,
+            (b"__TEXT", b"__const") => SectionKind::ReadOnlyData,
+            (b"__TEXT", b"__cstring") => SectionKind::ReadOnlyString,
+            (b"__TEXT", b"__literal4") => SectionKind::ReadOnlyData,
+            (b"__TEXT", b"__literal8") => SectionKind::ReadOnlyData,
+            (b"__TEXT", b"__literal16") => SectionKind::ReadOnlyData,
+            (b"__TEXT", b"__eh_frame") => SectionKind::ReadOnlyData,
+            (b"__TEXT", b"__gcc_except_tab") => SectionKind::ReadOnlyData,
+            (b"__DATA", b"__data") => SectionKind::Data,
+            (b"__DATA", b"__const") => SectionKind::ReadOnlyData,
+            (b"__DATA", b"__bss") => SectionKind::UninitializedData,
+            (b"__DATA", b"__common") => SectionKind::Common,
+            (b"__DATA", b"__thread_data") => SectionKind::Tls,
+            (b"__DATA", b"__thread_bss") => SectionKind::UninitializedTls,
+            (b"__DATA", b"__thread_vars") => SectionKind::TlsVariables,
+            (b"__DWARF", _) => SectionKind::Debug,
+            _ => SectionKind::Unknown,
+        };
+        MachOSectionInternal {
+            index,
+            segment_index,
+            kind,
+            section,
+        }
+    }
+}
+
+/// A trait for generic access to `Section32` and `Section64`.
+#[allow(missing_docs)]
+pub trait Section: Debug + Pod {
+    type Word: Into<u64>;
+    type Endian: endian::Endian;
+
+    fn sectname(&self) -> &[u8; 16];
+    fn segname(&self) -> &[u8; 16];
+    fn addr(&self, endian: Self::Endian) -> Self::Word;
+    fn size(&self, endian: Self::Endian) -> Self::Word;
+    fn offset(&self, endian: Self::Endian) -> u32;
+    fn align(&self, endian: Self::Endian) -> u32;
+    fn reloff(&self, endian: Self::Endian) -> u32;
+    fn nreloc(&self, endian: Self::Endian) -> u32;
+    fn flags(&self, endian: Self::Endian) -> u32;
+
+    /// Return the `sectname` bytes up until the null terminator.
+    fn name(&self) -> &[u8] {
+        let sectname = &self.sectname()[..];
+        match memchr::memchr(b'\0', sectname) {
+            Some(end) => &sectname[..end],
+            None => sectname,
+        }
+    }
+
+    /// Return the `segname` bytes up until the null terminator.
+    fn segment_name(&self) -> &[u8] {
+        let segname = &self.segname()[..];
+        match memchr::memchr(b'\0', segname) {
+            Some(end) => &segname[..end],
+            None => segname,
+        }
+    }
+
+    /// Return the offset and size of the section in the file.
+    ///
+    /// Returns `None` for sections that have no data in the file.
+    fn file_range(&self, endian: Self::Endian) -> Option<(u64, u64)> {
+        match self.flags(endian) & macho::SECTION_TYPE {
+            macho::S_ZEROFILL | macho::S_GB_ZEROFILL | macho::S_THREAD_LOCAL_ZEROFILL => None,
+            _ => Some((self.offset(endian).into(), self.size(endian).into())),
+        }
+    }
+
+    /// Return the section data.
+    ///
+    /// Returns `Ok(&[])` if the section has no data.
+    /// Returns `Err` for invalid values.
+    fn data<'data, R: ReadRef<'data>>(
+        &self,
+        endian: Self::Endian,
+        data: R,
+    ) -> result::Result<&'data [u8], ()> {
+        if let Some((offset, size)) = self.file_range(endian) {
+            data.read_bytes_at(offset, size)
+        } else {
+            Ok(&[])
+        }
+    }
+
+    /// Return the relocation array.
+    ///
+    /// Returns `Err` for invalid values.
+    fn relocations<'data, R: ReadRef<'data>>(
+        &self,
+        endian: Self::Endian,
+        data: R,
+    ) -> Result<&'data [macho::Relocation<Self::Endian>]> {
+        data.read_slice_at(self.reloff(endian).into(), self.nreloc(endian) as usize)
+            .read_error("Invalid Mach-O relocations offset or number")
+    }
+}
+
+impl<Endian: endian::Endian> Section for macho::Section32<Endian> {
+    type Word = u32;
+    type Endian = Endian;
+
+    fn sectname(&self) -> &[u8; 16] {
+        &self.sectname
+    }
+    fn segname(&self) -> &[u8; 16] {
+        &self.segname
+    }
+    fn addr(&self, endian: Self::Endian) -> Self::Word {
+        self.addr.get(endian)
+    }
+    fn size(&self, endian: Self::Endian) -> Self::Word {
+        self.size.get(endian)
+    }
+    fn offset(&self, endian: Self::Endian) -> u32 {
+        self.offset.get(endian)
+    }
+    fn align(&self, endian: Self::Endian) -> u32 {
+        self.align.get(endian)
+    }
+    fn reloff(&self, endian: Self::Endian) -> u32 {
+        self.reloff.get(endian)
+    }
+    fn nreloc(&self, endian: Self::Endian) -> u32 {
+        self.nreloc.get(endian)
+    }
+    fn flags(&self, endian: Self::Endian) -> u32 {
+        self.flags.get(endian)
+    }
+}
+
+impl<Endian: endian::Endian> Section for macho::Section64<Endian> {
+    type Word = u64;
+    type Endian = Endian;
+
+    fn sectname(&self) -> &[u8; 16] {
+        &self.sectname
+    }
+    fn segname(&self) -> &[u8; 16] {
+        &self.segname
+    }
+    fn addr(&self, endian: Self::Endian) -> Self::Word {
+        self.addr.get(endian)
+    }
+    fn size(&self, endian: Self::Endian) -> Self::Word {
+        self.size.get(endian)
+    }
+    fn offset(&self, endian: Self::Endian) -> u32 {
+        self.offset.get(endian)
+    }
+    fn align(&self, endian: Self::Endian) -> u32 {
+        self.align.get(endian)
+    }
+    fn reloff(&self, endian: Self::Endian) -> u32 {
+        self.reloff.get(endian)
+    }
+    fn nreloc(&self, endian: Self::Endian) -> u32 {
+        self.nreloc.get(endian)
+    }
+    fn flags(&self, endian: Self::Endian) -> u32 {
+        self.flags.get(endian)
+    }
+}
diff --git a/third_party/rust/object/src/read/macho/segment.rs b/third_party/rust/object/src/read/macho/segment.rs
new file mode 100644
index 0000000000..c7eaa6fff7
--- /dev/null
+++ b/third_party/rust/object/src/read/macho/segment.rs
@@ -0,0 +1,303 @@
+use core::fmt::Debug;
+use core::{result, slice, str};
+
+use crate::endian::{self, Endianness};
+use crate::macho;
+use crate::pod::Pod;
+use crate::read::{self, ObjectSegment, ReadError, ReadRef, Result, SegmentFlags};
+
+use super::{LoadCommandData, MachHeader, MachOFile, Section};
+
+/// An iterator over the segments of a `MachOFile32`.
+pub type MachOSegmentIterator32<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    MachOSegmentIterator<'data, 'file, macho::MachHeader32<Endian>, R>;
+/// An iterator over the segments of a `MachOFile64`.
+pub type MachOSegmentIterator64<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    MachOSegmentIterator<'data, 'file, macho::MachHeader64<Endian>, R>;
+
+/// An iterator over the segments of a `MachOFile`.
+#[derive(Debug)]
+pub struct MachOSegmentIterator<'data, 'file, Mach, R = &'data [u8]>
+where
+    'data: 'file,
+    Mach: MachHeader,
+    R: ReadRef<'data>,
+{
+    pub(super) file: &'file MachOFile<'data, Mach, R>,
+    pub(super) iter: slice::Iter<'file, MachOSegmentInternal<'data, Mach, R>>,
+}
+
+impl<'data, 'file, Mach, R> Iterator for MachOSegmentIterator<'data, 'file, Mach, R>
+where
+    Mach: MachHeader,
+    R: ReadRef<'data>,
+{
+    type Item = MachOSegment<'data, 'file, Mach, R>;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        self.iter.next().map(|internal| MachOSegment {
+            file: self.file,
+            internal,
+        })
+    }
+}
+
+/// A segment of a `MachOFile32`.
+pub type MachOSegment32<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    MachOSegment<'data, 'file, macho::MachHeader32<Endian>, R>;
+/// A segment of a `MachOFile64`.
+pub type MachOSegment64<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    MachOSegment<'data, 'file, macho::MachHeader64<Endian>, R>;
+
+/// A segment of a `MachOFile`.
+#[derive(Debug)]
+pub struct MachOSegment<'data, 'file, Mach, R = &'data [u8]>
+where
+    'data: 'file,
+    Mach: MachHeader,
+    R: ReadRef<'data>,
+{
+    file: &'file MachOFile<'data, Mach, R>,
+    internal: &'file MachOSegmentInternal<'data, Mach, R>,
+}
+
+impl<'data, 'file, Mach, R> MachOSegment<'data, 'file, Mach, R>
+where
+    Mach: MachHeader,
+    R: ReadRef<'data>,
+{
+    fn bytes(&self) -> Result<&'data [u8]> {
+        self.internal
+            .segment
+            .data(self.file.endian, self.file.data)
+            .read_error("Invalid Mach-O segment size or offset")
+    }
+}
+
+impl<'data, 'file, Mach, R> read::private::Sealed for MachOSegment<'data, 'file, Mach, R>
+where
+    Mach: MachHeader,
+    R: ReadRef<'data>,
+{
+}
+
+impl<'data, 'file, Mach, R> ObjectSegment<'data> for MachOSegment<'data, 'file, Mach, R>
+where
+    Mach: MachHeader,
+    R: ReadRef<'data>,
+{
+    #[inline]
+    fn address(&self) -> u64 {
+        self.internal.segment.vmaddr(self.file.endian).into()
+    }
+
+    #[inline]
+    fn size(&self) -> u64 {
+        self.internal.segment.vmsize(self.file.endian).into()
+    }
+
+    #[inline]
+    fn align(&self) -> u64 {
+        // Page size.
+        0x1000
+    }
+
+    #[inline]
+    fn file_range(&self) -> (u64, u64) {
+        self.internal.segment.file_range(self.file.endian)
+    }
+
+    fn data(&self) -> Result<&'data [u8]> {
+        self.bytes()
+    }
+
+    fn data_range(&self, address: u64, size: u64) -> Result<Option<&'data [u8]>> {
+        Ok(read::util::data_range(
+            self.bytes()?,
+            self.address(),
+            address,
+            size,
+        ))
+    }
+
+    #[inline]
+    fn name_bytes(&self) -> Result<Option<&[u8]>> {
+        Ok(Some(self.internal.segment.name()))
+    }
+
+    #[inline]
+    fn name(&self) -> Result<Option<&str>> {
+        Ok(Some(
+            str::from_utf8(self.internal.segment.name())
+                .ok()
+                .read_error("Non UTF-8 Mach-O segment name")?,
+        ))
+    }
+
+    #[inline]
+    fn flags(&self) -> SegmentFlags {
+        let flags = self.internal.segment.flags(self.file.endian);
+        let maxprot = self.internal.segment.maxprot(self.file.endian);
+        let initprot = self.internal.segment.initprot(self.file.endian);
+        SegmentFlags::MachO {
+            flags,
+            maxprot,
+            initprot,
+        }
+    }
+}
+
+#[derive(Debug, Clone, Copy)]
+pub(super) struct MachOSegmentInternal<'data, Mach: MachHeader, R: ReadRef<'data>> {
+    pub data: R,
+    pub segment: &'data Mach::Segment,
+}
+
+/// A trait for generic access to `SegmentCommand32` and `SegmentCommand64`.
+#[allow(missing_docs)]
+pub trait Segment: Debug + Pod {
+    type Word: Into<u64>;
+    type Endian: endian::Endian;
+    type Section: Section<Endian = Self::Endian>;
+
+    fn from_command(command: LoadCommandData<Self::Endian>) -> Result<Option<(&Self, &[u8])>>;
+
+    fn cmd(&self, endian: Self::Endian) -> u32;
+    fn cmdsize(&self, endian: Self::Endian) -> u32;
+    fn segname(&self) -> &[u8; 16];
+    fn vmaddr(&self, endian: Self::Endian) -> Self::Word;
+    fn vmsize(&self, endian: Self::Endian) -> Self::Word;
+    fn fileoff(&self, endian: Self::Endian) -> Self::Word;
+    fn filesize(&self, endian: Self::Endian) -> Self::Word;
+    fn maxprot(&self, endian: Self::Endian) -> u32;
+    fn initprot(&self, endian: Self::Endian) -> u32;
+    fn nsects(&self, endian: Self::Endian) -> u32;
+    fn flags(&self, endian: Self::Endian) -> u32;
+
+    /// Return the `segname` bytes up until the null terminator.
+    fn name(&self) -> &[u8] {
+        let segname = &self.segname()[..];
+        match memchr::memchr(b'\0', segname) {
+            Some(end) => &segname[..end],
+            None => segname,
+        }
+    }
+
+    /// Return the offset and size of the segment in the file.
+    fn file_range(&self, endian: Self::Endian) -> (u64, u64) {
+        (self.fileoff(endian).into(), self.filesize(endian).into())
+    }
+
+    /// Get the segment data from the file data.
+    ///
+    /// Returns `Err` for invalid values.
+    fn data<'data, R: ReadRef<'data>>(
+        &self,
+        endian: Self::Endian,
+        data: R,
+    ) -> result::Result<&'data [u8], ()> {
+        let (offset, size) = self.file_range(endian);
+        data.read_bytes_at(offset, size)
+    }
+
+    /// Get the array of sections from the data following the segment command.
+    ///
+    /// Returns `Err` for invalid values.
+    fn sections<'data, R: ReadRef<'data>>(
+        &self,
+        endian: Self::Endian,
+        section_data: R,
+    ) -> Result<&'data [Self::Section]> {
+        section_data
+            .read_slice_at(0, self.nsects(endian) as usize)
+            .read_error("Invalid Mach-O number of sections")
+    }
+}
+
+impl<Endian: endian::Endian> Segment for macho::SegmentCommand32<Endian> {
+    type Word = u32;
+    type Endian = Endian;
+    type Section = macho::Section32<Self::Endian>;
+
+    fn from_command(command: LoadCommandData<Self::Endian>) -> Result<Option<(&Self, &[u8])>> {
+        command.segment_32()
+    }
+
+    fn cmd(&self, endian: Self::Endian) -> u32 {
+        self.cmd.get(endian)
+    }
+    fn cmdsize(&self, endian: Self::Endian) -> u32 {
+        self.cmdsize.get(endian)
+    }
+    fn segname(&self) -> &[u8; 16] {
+        &self.segname
+    }
+    fn vmaddr(&self, endian: Self::Endian) -> Self::Word {
+        self.vmaddr.get(endian)
+    }
+    fn vmsize(&self, endian: Self::Endian) -> Self::Word {
+        self.vmsize.get(endian)
+    }
+    fn fileoff(&self, endian: Self::Endian) -> Self::Word {
+        self.fileoff.get(endian)
+    }
+    fn filesize(&self, endian: Self::Endian) -> Self::Word {
+        self.filesize.get(endian)
+    }
+    fn maxprot(&self, endian: Self::Endian) -> u32 {
+        self.maxprot.get(endian)
+    }
+    fn initprot(&self, endian: Self::Endian) -> u32 {
+        self.initprot.get(endian)
+    }
+    fn nsects(&self, endian: Self::Endian) -> u32 {
+        self.nsects.get(endian)
+    }
+    fn flags(&self, endian: Self::Endian) -> u32 {
+        self.flags.get(endian)
+    }
+}
+
+impl<Endian: endian::Endian> Segment for macho::SegmentCommand64<Endian> {
+    type Word = u64;
+    type Endian = Endian;
+    type Section = macho::Section64<Self::Endian>;
+
+    fn from_command(command: LoadCommandData<Self::Endian>) -> Result<Option<(&Self, &[u8])>> {
+        command.segment_64()
+    }
+
+    fn cmd(&self, endian: Self::Endian) -> u32 {
+        self.cmd.get(endian)
+    }
+    fn cmdsize(&self, endian: Self::Endian) -> u32 {
+        self.cmdsize.get(endian)
+    }
+    fn segname(&self) -> &[u8; 16] {
+        &self.segname
+    }
+    fn vmaddr(&self, endian: Self::Endian) -> Self::Word {
+        self.vmaddr.get(endian)
+    }
+    fn vmsize(&self, endian: Self::Endian) -> Self::Word {
+        self.vmsize.get(endian)
+    }
+    fn fileoff(&self, endian: Self::Endian) -> Self::Word {
+        self.fileoff.get(endian)
+    }
+    fn filesize(&self, endian: Self::Endian) -> Self::Word {
+        self.filesize.get(endian)
+    }
+    fn maxprot(&self, endian: Self::Endian) -> u32 {
+        self.maxprot.get(endian)
+    }
+    fn initprot(&self, endian: Self::Endian) -> u32 {
+        self.initprot.get(endian)
+    }
+    fn nsects(&self, endian: Self::Endian) -> u32 {
+        self.nsects.get(endian)
+    }
+    fn flags(&self, endian: Self::Endian) -> u32 {
+        self.flags.get(endian)
+    }
+}
diff --git a/third_party/rust/object/src/read/macho/symbol.rs b/third_party/rust/object/src/read/macho/symbol.rs
new file mode 100644
index 0000000000..e102c5d0b6
--- /dev/null
+++ b/third_party/rust/object/src/read/macho/symbol.rs
@@ -0,0 +1,488 @@
+use alloc::vec::Vec;
+use core::fmt::Debug;
+use core::{fmt, slice, str};
+
+use crate::endian::{self, Endianness};
+use crate::macho;
+use crate::pod::Pod;
+use crate::read::util::StringTable;
+use crate::read::{
+    self, ObjectMap, ObjectMapEntry, ObjectSymbol, ObjectSymbolTable, ReadError, ReadRef, Result,
+    SectionIndex, SectionKind, SymbolFlags, SymbolIndex, SymbolKind, SymbolMap, SymbolMapEntry,
+    SymbolScope, SymbolSection,
+};
+
+use super::{MachHeader, MachOFile};
+
+/// A table of symbol entries in a Mach-O file.
+///
+/// Also includes the string table used for the symbol names.
+#[derive(Debug, Clone, Copy)]
+pub struct SymbolTable<'data, Mach: MachHeader, R = &'data [u8]>
+where
+    R: ReadRef<'data>,
+{
+    symbols: &'data [Mach::Nlist],
+    strings: StringTable<'data, R>,
+}
+
+impl<'data, Mach: MachHeader, R: ReadRef<'data>> Default for SymbolTable<'data, Mach, R> {
+    fn default() -> Self {
+        SymbolTable {
+            symbols: &[],
+            strings: Default::default(),
+        }
+    }
+}
+
+impl<'data, Mach: MachHeader, R: ReadRef<'data>> SymbolTable<'data, Mach, R> {
+    #[inline]
+    pub(super) fn new(symbols: &'data [Mach::Nlist], strings: StringTable<'data, R>) -> Self {
+        SymbolTable { symbols, strings }
+    }
+
+    /// Return the string table used for the symbol names.
+    #[inline]
+    pub fn strings(&self) -> StringTable<'data, R> {
+        self.strings
+    }
+
+    /// Iterate over the symbols.
+    #[inline]
+    pub fn iter(&self) -> slice::Iter<'data, Mach::Nlist> {
+        self.symbols.iter()
+    }
+
+    /// Return true if the symbol table is empty.
+    #[inline]
+    pub fn is_empty(&self) -> bool {
+        self.symbols.is_empty()
+    }
+
+    /// The number of symbols.
+    #[inline]
+    pub fn len(&self) -> usize {
+        self.symbols.len()
+    }
+
+    /// Return the symbol at the given index.
+    pub fn symbol(&self, index: usize) -> Result<&'data Mach::Nlist> {
+        self.symbols
+            .get(index)
+            .read_error("Invalid Mach-O symbol index")
+    }
+
+    /// Construct a map from addresses to a user-defined map entry.
+    pub fn map<Entry: SymbolMapEntry, F: Fn(&'data Mach::Nlist) -> Option<Entry>>(
+        &self,
+        f: F,
+    ) -> SymbolMap<Entry> {
+        let mut symbols = Vec::new();
+        for nlist in self.symbols {
+            if !nlist.is_definition() {
+                continue;
+            }
+            if let Some(entry) = f(nlist) {
+                symbols.push(entry);
+            }
+        }
+        SymbolMap::new(symbols)
+    }
+
+    /// Construct a map from addresses to symbol names and object file names.
+    pub fn object_map(&self, endian: Mach::Endian) -> ObjectMap<'data> {
+        let mut symbols = Vec::new();
+        let mut objects = Vec::new();
+        let mut object = None;
+        let mut current_function = None;
+        // Each module starts with one or two N_SO symbols (path, or directory + filename)
+        // and one N_OSO symbol. The module is terminated by an empty N_SO symbol.
+        for nlist in self.symbols {
+            let n_type = nlist.n_type();
+            if n_type & macho::N_STAB == 0 {
+                continue;
+            }
+            // TODO: includes variables too (N_GSYM, N_STSYM). These may need to get their
+            // address from regular symbols though.
+            match n_type {
+                macho::N_SO => {
+                    object = None;
+                }
+                macho::N_OSO => {
+                    object = None;
+                    if let Ok(name) = nlist.name(endian, self.strings) {
+                        if !name.is_empty() {
+                            object = Some(objects.len());
+                            objects.push(name);
+                        }
+                    }
+                }
+                macho::N_FUN => {
+                    if let Ok(name) = nlist.name(endian, self.strings) {
+                        if !name.is_empty() {
+                            current_function = Some((name, nlist.n_value(endian).into()))
+                        } else if let Some((name, address)) = current_function.take() {
+                            if let Some(object) = object {
+                                symbols.push(ObjectMapEntry {
+                                    address,
+                                    size: nlist.n_value(endian).into(),
+                                    name,
+                                    object,
+                                });
+                            }
+                        }
+                    }
+                }
+                _ => {}
+            }
+        }
+        ObjectMap {
+            symbols: SymbolMap::new(symbols),
+            objects,
+        }
+    }
+}
+
+/// An iterator over the symbols of a `MachOFile32`.
+pub type MachOSymbolTable32<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    MachOSymbolTable<'data, 'file, macho::MachHeader32<Endian>, R>;
+/// An iterator over the symbols of a `MachOFile64`.
+pub type MachOSymbolTable64<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    MachOSymbolTable<'data, 'file, macho::MachHeader64<Endian>, R>;
+
+/// A symbol table of a `MachOFile`.
+#[derive(Debug, Clone, Copy)]
+pub struct MachOSymbolTable<'data, 'file, Mach, R = &'data [u8]>
+where
+    Mach: MachHeader,
+    R: ReadRef<'data>,
+{
+    pub(super) file: &'file MachOFile<'data, Mach, R>,
+}
+
+impl<'data, 'file, Mach, R> read::private::Sealed for MachOSymbolTable<'data, 'file, Mach, R>
+where
+    Mach: MachHeader,
+    R: ReadRef<'data>,
+{
+}
+
+impl<'data, 'file, Mach, R> ObjectSymbolTable<'data> for MachOSymbolTable<'data, 'file, Mach, R>
+where
+    Mach: MachHeader,
+    R: ReadRef<'data>,
+{
+    type Symbol = MachOSymbol<'data, 'file, Mach, R>;
+    type SymbolIterator = MachOSymbolIterator<'data, 'file, Mach, R>;
+
+    fn symbols(&self) -> Self::SymbolIterator {
+        MachOSymbolIterator {
+            file: self.file,
+            index: 0,
+        }
+    }
+
+    fn symbol_by_index(&self, index: SymbolIndex) -> Result<Self::Symbol> {
+        let nlist = self.file.symbols.symbol(index.0)?;
+        MachOSymbol::new(self.file, index, nlist).read_error("Unsupported Mach-O symbol index")
+    }
+}
+
+/// An iterator over the symbols of a `MachOFile32`.
+pub type MachOSymbolIterator32<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    MachOSymbolIterator<'data, 'file, macho::MachHeader32<Endian>, R>;
+/// An iterator over the symbols of a `MachOFile64`.
+pub type MachOSymbolIterator64<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    MachOSymbolIterator<'data, 'file, macho::MachHeader64<Endian>, R>;
+
+/// An iterator over the symbols of a `MachOFile`.
+pub struct MachOSymbolIterator<'data, 'file, Mach, R = &'data [u8]>
+where
+    Mach: MachHeader,
+    R: ReadRef<'data>,
+{
+    pub(super) file: &'file MachOFile<'data, Mach, R>,
+    pub(super) index: usize,
+}
+
+impl<'data, 'file, Mach, R> fmt::Debug for MachOSymbolIterator<'data, 'file, Mach, R>
+where
+    Mach: MachHeader,
+    R: ReadRef<'data>,
+{
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("MachOSymbolIterator").finish()
+    }
+}
+
+impl<'data, 'file, Mach, R> Iterator for MachOSymbolIterator<'data, 'file, Mach, R>
+where
+    Mach: MachHeader,
+    R: ReadRef<'data>,
+{
+    type Item = MachOSymbol<'data, 'file, Mach, R>;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        loop {
+            let index = self.index;
+            let nlist = self.file.symbols.symbols.get(index)?;
+            self.index += 1;
+            if let Some(symbol) = MachOSymbol::new(self.file, SymbolIndex(index), nlist) {
+                return Some(symbol);
+            }
+        }
+    }
+}
+
+/// A symbol of a `MachOFile32`.
+pub type MachOSymbol32<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    MachOSymbol<'data, 'file, macho::MachHeader32<Endian>, R>;
+/// A symbol of a `MachOFile64`.
+pub type MachOSymbol64<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+    MachOSymbol<'data, 'file, macho::MachHeader64<Endian>, R>;
+
+/// A symbol of a `MachOFile`.
+#[derive(Debug, Clone, Copy)]
+pub struct MachOSymbol<'data, 'file, Mach, R = &'data [u8]>
+where
+    Mach: MachHeader,
+    R: ReadRef<'data>,
+{
+    file: &'file MachOFile<'data, Mach, R>,
+    index: SymbolIndex,
+    nlist: &'data Mach::Nlist,
+}
+
+impl<'data, 'file, Mach, R> MachOSymbol<'data, 'file, Mach, R>
+where
+    Mach: MachHeader,
+    R: ReadRef<'data>,
+{
+    pub(super) fn new(
+        file: &'file MachOFile<'data, Mach, R>,
+        index: SymbolIndex,
+        nlist: &'data Mach::Nlist,
+    ) -> Option<Self> {
+        if nlist.n_type() & macho::N_STAB != 0 {
+            return None;
+        }
+        Some(MachOSymbol { file, index, nlist })
+    }
+}
+
+impl<'data, 'file, Mach, R> read::private::Sealed for MachOSymbol<'data, 'file, Mach, R>
+where
+    Mach: MachHeader,
+    R: ReadRef<'data>,
+{
+}
+
+impl<'data, 'file, Mach, R> ObjectSymbol<'data> for MachOSymbol<'data, 'file, Mach, R>
+where
+    Mach: MachHeader,
+    R: ReadRef<'data>,
+{
+    #[inline]
+    fn index(&self) -> SymbolIndex {
+        self.index
+    }
+
+    fn name_bytes(&self) -> Result<&'data [u8]> {
+        self.nlist.name(self.file.endian, self.file.symbols.strings)
+    }
+
+    fn name(&self) -> Result<&'data str> {
+        let name = self.name_bytes()?;
+        str::from_utf8(name)
+            .ok()
+            .read_error("Non UTF-8 Mach-O symbol name")
+    }
+
+    #[inline]
+    fn address(&self) -> u64 {
+        self.nlist.n_value(self.file.endian).into()
+    }
+
+    #[inline]
+    fn size(&self) -> u64 {
+        0
+    }
+
+    fn kind(&self) -> SymbolKind {
+        self.section()
+            .index()
+            .and_then(|index| self.file.section_internal(index).ok())
+            .map(|section| match section.kind {
+                SectionKind::Text => SymbolKind::Text,
+                SectionKind::Data
+                | SectionKind::ReadOnlyData
+                | SectionKind::ReadOnlyString
+                | SectionKind::UninitializedData
+                | SectionKind::Common => SymbolKind::Data,
+                SectionKind::Tls | SectionKind::UninitializedTls | SectionKind::TlsVariables => {
+                    SymbolKind::Tls
+                }
+                _ => SymbolKind::Unknown,
+            })
+            .unwrap_or(SymbolKind::Unknown)
+    }
+
+    fn section(&self) -> SymbolSection {
+        match self.nlist.n_type() & macho::N_TYPE {
+            macho::N_UNDF => SymbolSection::Undefined,
+            macho::N_ABS => SymbolSection::Absolute,
+            macho::N_SECT => {
+                let n_sect = self.nlist.n_sect();
+                if n_sect != 0 {
+                    SymbolSection::Section(SectionIndex(n_sect as usize))
+                } else {
+                    SymbolSection::Unknown
+                }
+            }
+            _ => SymbolSection::Unknown,
+        }
+    }
+
+    #[inline]
+    fn is_undefined(&self) -> bool {
+        self.nlist.n_type() & macho::N_TYPE == macho::N_UNDF
+    }
+
+    #[inline]
+    fn is_definition(&self) -> bool {
+        self.nlist.is_definition()
+    }
+
+    #[inline]
+    fn is_common(&self) -> bool {
+        // Mach-O common symbols are based on section, not symbol
+        false
+    }
+
+    #[inline]
+    fn is_weak(&self) -> bool {
+        self.nlist.n_desc(self.file.endian) & (macho::N_WEAK_REF | macho::N_WEAK_DEF) != 0
+    }
+
+    fn scope(&self) -> SymbolScope {
+        let n_type = self.nlist.n_type();
+        if n_type & macho::N_TYPE == macho::N_UNDF {
+            SymbolScope::Unknown
+        } else if n_type & macho::N_EXT == 0 {
+            SymbolScope::Compilation
+        } else if n_type & macho::N_PEXT != 0 {
+            SymbolScope::Linkage
+        } else {
+            SymbolScope::Dynamic
+        }
+    }
+
+    #[inline]
+    fn is_global(&self) -> bool {
+        self.scope() != SymbolScope::Compilation
+    }
+
+    #[inline]
+    fn is_local(&self) -> bool {
+        self.scope() == SymbolScope::Compilation
+    }
+
+    #[inline]
+    fn flags(&self) -> SymbolFlags<SectionIndex> {
+        let n_desc = self.nlist.n_desc(self.file.endian);
+        SymbolFlags::MachO { n_desc }
+    }
+}
+
+/// A trait for generic access to `Nlist32` and `Nlist64`.
+#[allow(missing_docs)]
+pub trait Nlist: Debug + Pod {
+    type Word: Into<u64>;
+    type Endian: endian::Endian;
+
+    fn n_strx(&self, endian: Self::Endian) -> u32;
+    fn n_type(&self) -> u8;
+    fn n_sect(&self) -> u8;
+    fn n_desc(&self, endian: Self::Endian) -> u16;
+    fn n_value(&self, endian: Self::Endian) -> Self::Word;
+
+    fn name<'data, R: ReadRef<'data>>(
+        &self,
+        endian: Self::Endian,
+        strings: StringTable<'data, R>,
+    ) -> Result<&'data [u8]> {
+        strings
+            .get(self.n_strx(endian))
+            .read_error("Invalid Mach-O symbol name offset")
+    }
+
+    /// Return true if this is a STAB symbol.
+    ///
+    /// This determines the meaning of the `n_type` field.
+    fn is_stab(&self) -> bool {
+        self.n_type() & macho::N_STAB != 0
+    }
+
+    /// Return true if this is an undefined symbol.
+    fn is_undefined(&self) -> bool {
+        let n_type = self.n_type();
+        n_type & macho::N_STAB == 0 && n_type & macho::N_TYPE == macho::N_UNDF
+    }
+
+    /// Return true if the symbol is a definition of a function or data object.
+    fn is_definition(&self) -> bool {
+        let n_type = self.n_type();
+        n_type & macho::N_STAB == 0 && n_type & macho::N_TYPE != macho::N_UNDF
+    }
+
+    /// Return the library ordinal.
+    ///
+    /// This is either a 1-based index into the dylib load commands,
+    /// or a special ordinal.
+    #[inline]
+    fn library_ordinal(&self, endian: Self::Endian) -> u8 {
+        (self.n_desc(endian) >> 8) as u8
+    }
+}
+
+impl<Endian: endian::Endian> Nlist for macho::Nlist32<Endian> {
+    type Word = u32;
+    type Endian = Endian;
+
+    fn n_strx(&self, endian: Self::Endian) -> u32 {
+        self.n_strx.get(endian)
+    }
+    fn n_type(&self) -> u8 {
+        self.n_type
+    }
+    fn n_sect(&self) -> u8 {
+        self.n_sect
+    }
+    fn n_desc(&self, endian: Self::Endian) -> u16 {
+        self.n_desc.get(endian)
+    }
+    fn n_value(&self, endian: Self::Endian) -> Self::Word {
+        self.n_value.get(endian)
+    }
+}
+
+impl<Endian: endian::Endian> Nlist for macho::Nlist64<Endian> {
+    type Word = u64;
+    type Endian = Endian;
+
+    fn n_strx(&self, endian: Self::Endian) -> u32 {
+        self.n_strx.get(endian)
+    }
+    fn n_type(&self) -> u8 {
+        self.n_type
+    }
+    fn n_sect(&self) -> u8 {
+        self.n_sect
+    }
+    fn n_desc(&self, endian: Self::Endian) -> u16 {
+        self.n_desc.get(endian)
+    }
+    fn n_value(&self, endian: Self::Endian) -> Self::Word {
+        self.n_value.get(endian)
+    }
+}
diff --git a/third_party/rust/object/src/read/mod.rs b/third_party/rust/object/src/read/mod.rs
new file mode 100644
index 0000000000..91a5c05a58
--- /dev/null
+++ b/third_party/rust/object/src/read/mod.rs
@@ -0,0 +1,725 @@
+//! Interface for reading object files.
+
+use alloc::borrow::Cow;
+use alloc::vec::Vec;
+use core::{fmt, result};
+
+use crate::common::*;
+
+mod read_ref;
+pub use read_ref::*;
+
+#[cfg(feature = "std")]
+mod read_cache;
+#[cfg(feature = "std")]
+pub use read_cache::*;
+
+mod util;
+pub use util::*;
+
+#[cfg(any(
+    feature = "coff",
+    feature = "elf",
+    feature = "macho",
+    feature = "pe",
+    feature = "wasm",
+    feature = "xcoff"
+))]
+mod any;
+#[cfg(any(
+    feature = "coff",
+    feature = "elf",
+    feature = "macho",
+    feature = "pe",
+    feature = "wasm",
+    feature = "xcoff"
+))]
+pub use any::*;
+
+#[cfg(feature = "archive")]
+pub mod archive;
+
+#[cfg(feature = "coff")]
+pub mod coff;
+
+#[cfg(feature = "elf")]
+pub mod elf;
+
+#[cfg(feature = "macho")]
+pub mod macho;
+
+#[cfg(feature = "pe")]
+pub mod pe;
+
+#[cfg(feature = "wasm")]
+pub mod wasm;
+
+#[cfg(feature = "xcoff")]
+pub mod xcoff;
+
+mod traits;
+pub use traits::*;
+
+mod private {
+    pub trait Sealed {}
+}
+
+/// The error type used within the read module.
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub struct Error(&'static str);
+
+impl fmt::Display for Error {
+    #[inline]
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        f.write_str(self.0)
+    }
+}
+
+#[cfg(feature = "std")]
+impl std::error::Error for Error {}
+
+/// The result type used within the read module.
+pub type Result<T> = result::Result<T, Error>;
+
+trait ReadError<T> {
+    fn read_error(self, error: &'static str) -> Result<T>;
+}
+
+impl<T> ReadError<T> for result::Result<T, ()> {
+    fn read_error(self, error: &'static str) -> Result<T> {
+        self.map_err(|()| Error(error))
+    }
+}
+
+impl<T> ReadError<T> for result::Result<T, Error> {
+    fn read_error(self, error: &'static str) -> Result<T> {
+        self.map_err(|_| Error(error))
+    }
+}
+
+impl<T> ReadError<T> for Option<T> {
+    fn read_error(self, error: &'static str) -> Result<T> {
+        self.ok_or(Error(error))
+    }
+}
+
+/// The native executable file for the target platform.
+#[cfg(all(
+    unix,
+    not(target_os = "macos"),
+    target_pointer_width = "32",
+    feature = "elf"
+))]
+pub type NativeFile<'data, R = &'data [u8]> = elf::ElfFile32<'data, crate::Endianness, R>;
+
+/// The native executable file for the target platform.
+#[cfg(all(
+    unix,
+    not(target_os = "macos"),
+    target_pointer_width = "64",
+    feature = "elf"
+))]
+pub type NativeFile<'data, R = &'data [u8]> = elf::ElfFile64<'data, crate::Endianness, R>;
+
+/// The native executable file for the target platform.
+#[cfg(all(target_os = "macos", target_pointer_width = "32", feature = "macho"))]
+pub type NativeFile<'data, R = &'data [u8]> = macho::MachOFile32<'data, crate::Endianness, R>;
+
+/// The native executable file for the target platform.
+#[cfg(all(target_os = "macos", target_pointer_width = "64", feature = "macho"))]
+pub type NativeFile<'data, R = &'data [u8]> = macho::MachOFile64<'data, crate::Endianness, R>;
+
+/// The native executable file for the target platform.
+#[cfg(all(target_os = "windows", target_pointer_width = "32", feature = "pe"))]
+pub type NativeFile<'data, R = &'data [u8]> = pe::PeFile32<'data, R>;
+
+/// The native executable file for the target platform.
+#[cfg(all(target_os = "windows", target_pointer_width = "64", feature = "pe"))]
+pub type NativeFile<'data, R = &'data [u8]> = pe::PeFile64<'data, R>;
+
+/// The native executable file for the target platform.
+#[cfg(all(feature = "wasm", target_arch = "wasm32", feature = "wasm"))]
+pub type NativeFile<'data, R = &'data [u8]> = wasm::WasmFile<'data, R>;
+
+/// A file format kind.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+#[non_exhaustive]
+pub enum FileKind {
+    /// A Unix archive.
+    #[cfg(feature = "archive")]
+    Archive,
+    /// A COFF object file.
+    #[cfg(feature = "coff")]
+    Coff,
+    /// A dyld cache file containing Mach-O images.
+    #[cfg(feature = "macho")]
+    DyldCache,
+    /// A 32-bit ELF file.
+    #[cfg(feature = "elf")]
+    Elf32,
+    /// A 64-bit ELF file.
+    #[cfg(feature = "elf")]
+    Elf64,
+    /// A 32-bit Mach-O file.
+    #[cfg(feature = "macho")]
+    MachO32,
+    /// A 64-bit Mach-O file.
+    #[cfg(feature = "macho")]
+    MachO64,
+    /// A 32-bit Mach-O fat binary.
+    #[cfg(feature = "macho")]
+    MachOFat32,
+    /// A 64-bit Mach-O fat binary.
+    #[cfg(feature = "macho")]
+    MachOFat64,
+    /// A 32-bit PE file.
+    #[cfg(feature = "pe")]
+    Pe32,
+    /// A 64-bit PE file.
+    #[cfg(feature = "pe")]
+    Pe64,
+    /// A Wasm file.
+    #[cfg(feature = "wasm")]
+    Wasm,
+    /// A 32-bit XCOFF file.
+    #[cfg(feature = "xcoff")]
+    Xcoff32,
+    /// A 64-bit XCOFF file.
+    #[cfg(feature = "xcoff")]
+    Xcoff64,
+}
+
+impl FileKind {
+    /// Determine a file kind by parsing the start of the file.
+    pub fn parse<'data, R: ReadRef<'data>>(data: R) -> Result<FileKind> {
+        Self::parse_at(data, 0)
+    }
+
+    /// Determine a file kind by parsing at the given offset.
+    pub fn parse_at<'data, R: ReadRef<'data>>(data: R, offset: u64) -> Result<FileKind> {
+        let magic = data
+            .read_bytes_at(offset, 16)
+            .read_error("Could not read file magic")?;
+        if magic.len() < 16 {
+            return Err(Error("File too short"));
+        }
+
+        let kind = match [magic[0], magic[1], magic[2], magic[3], magic[4], magic[5], magic[6], magic[7]] {
+            #[cfg(feature = "archive")]
+            [b'!', b'<', b'a', b'r', b'c', b'h', b'>', b'\n'] => FileKind::Archive,
+            #[cfg(feature = "macho")]
+            [b'd', b'y', b'l', b'd', b'_', b'v', b'1', b' '] => FileKind::DyldCache,
+            #[cfg(feature = "elf")]
+            [0x7f, b'E', b'L', b'F', 1, ..] => FileKind::Elf32,
+            #[cfg(feature = "elf")]
+            [0x7f, b'E', b'L', b'F', 2, ..] => FileKind::Elf64,
+            #[cfg(feature = "macho")]
+            [0xfe, 0xed, 0xfa, 0xce, ..]
+            | [0xce, 0xfa, 0xed, 0xfe, ..] => FileKind::MachO32,
+            #[cfg(feature = "macho")]
+            | [0xfe, 0xed, 0xfa, 0xcf, ..]
+            | [0xcf, 0xfa, 0xed, 0xfe, ..] => FileKind::MachO64,
+            #[cfg(feature = "macho")]
+            [0xca, 0xfe, 0xba, 0xbe, ..] => FileKind::MachOFat32,
+            #[cfg(feature = "macho")]
+            [0xca, 0xfe, 0xba, 0xbf, ..] => FileKind::MachOFat64,
+            #[cfg(feature = "wasm")]
+            [0x00, b'a', b's', b'm', ..] => FileKind::Wasm,
+            #[cfg(feature = "pe")]
+            [b'M', b'Z', ..] => {
+                match pe::optional_header_magic(data) {
+                    Ok(crate::pe::IMAGE_NT_OPTIONAL_HDR32_MAGIC) => {
+                        FileKind::Pe32
+                    }
+                    Ok(crate::pe::IMAGE_NT_OPTIONAL_HDR64_MAGIC) => {
+                        FileKind::Pe64
+                    }
+                    _ => return Err(Error("Unknown MS-DOS file")),
+                }
+            }
+            // TODO: more COFF machines
+            #[cfg(feature = "coff")]
+            // COFF arm
+            [0xc4, 0x01, ..]
+            // COFF arm64
+            | [0x64, 0xaa, ..]
+            // COFF x86
+            | [0x4c, 0x01, ..]
+            // COFF x86-64
+            | [0x64, 0x86, ..] => FileKind::Coff,
+            #[cfg(feature = "xcoff")]
+            [0x01, 0xDF, ..] => FileKind::Xcoff32,
+            #[cfg(feature = "xcoff")]
+            [0x01, 0xF7, ..] => FileKind::Xcoff64,
+            _ => return Err(Error("Unknown file magic")),
+        };
+        Ok(kind)
+    }
+}
+
+/// An object kind.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+#[non_exhaustive]
+pub enum ObjectKind {
+    /// The object kind is unknown.
+    Unknown,
+    /// Relocatable object.
+    Relocatable,
+    /// Executable.
+    Executable,
+    /// Dynamic shared object.
+    Dynamic,
+    /// Core.
+    Core,
+}
+
+/// The index used to identify a section of a file.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub struct SectionIndex(pub usize);
+
+/// The index used to identify a symbol of a file.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub struct SymbolIndex(pub usize);
+
+/// The section where a symbol is defined.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+#[non_exhaustive]
+pub enum SymbolSection {
+    /// The section is unknown.
+    Unknown,
+    /// The section is not applicable for this symbol (such as file symbols).
+    None,
+    /// The symbol is undefined.
+    Undefined,
+    /// The symbol has an absolute value.
+    Absolute,
+    /// The symbol is a zero-initialized symbol that will be combined with duplicate definitions.
+    Common,
+    /// The symbol is defined in the given section.
+    Section(SectionIndex),
+}
+
+impl SymbolSection {
+    /// Returns the section index for the section where the symbol is defined.
+    ///
+    /// May return `None` if the symbol is not defined in a section.
+    #[inline]
+    pub fn index(self) -> Option<SectionIndex> {
+        if let SymbolSection::Section(index) = self {
+            Some(index)
+        } else {
+            None
+        }
+    }
+}
+
+/// An entry in a `SymbolMap`.
+pub trait SymbolMapEntry {
+    /// The symbol address.
+    fn address(&self) -> u64;
+}
+
+/// A map from addresses to symbols.
+#[derive(Debug, Default, Clone)]
+pub struct SymbolMap<T: SymbolMapEntry> {
+    symbols: Vec<T>,
+}
+
+impl<T: SymbolMapEntry> SymbolMap<T> {
+    /// Construct a new symbol map.
+    ///
+    /// This function will sort the symbols by address.
+    pub fn new(mut symbols: Vec<T>) -> Self {
+        symbols.sort_unstable_by_key(|s| s.address());
+        SymbolMap { symbols }
+    }
+
+    /// Get the symbol before the given address.
+    pub fn get(&self, address: u64) -> Option<&T> {
+        let index = match self
+            .symbols
+            .binary_search_by_key(&address, |symbol| symbol.address())
+        {
+            Ok(index) => index,
+            Err(index) => index.checked_sub(1)?,
+        };
+        self.symbols.get(index)
+    }
+
+    /// Get all symbols in the map.
+    #[inline]
+    pub fn symbols(&self) -> &[T] {
+        &self.symbols
+    }
+}
+
+/// A `SymbolMap` entry for symbol names.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub struct SymbolMapName<'data> {
+    address: u64,
+    name: &'data str,
+}
+
+impl<'data> SymbolMapName<'data> {
+    /// Construct a `SymbolMapName`.
+    pub fn new(address: u64, name: &'data str) -> Self {
+        SymbolMapName { address, name }
+    }
+
+    /// The symbol address.
+    #[inline]
+    pub fn address(&self) -> u64 {
+        self.address
+    }
+
+    /// The symbol name.
+    #[inline]
+    pub fn name(&self) -> &'data str {
+        self.name
+    }
+}
+
+impl<'data> SymbolMapEntry for SymbolMapName<'data> {
+    #[inline]
+    fn address(&self) -> u64 {
+        self.address
+    }
+}
+
+/// A map from addresses to symbol names and object files.
+///
+/// This is derived from STAB entries in Mach-O files.
+#[derive(Debug, Default, Clone)]
+pub struct ObjectMap<'data> {
+    symbols: SymbolMap<ObjectMapEntry<'data>>,
+    objects: Vec<&'data [u8]>,
+}
+
+impl<'data> ObjectMap<'data> {
+    /// Get the entry containing the given address.
+    pub fn get(&self, address: u64) -> Option<&ObjectMapEntry<'data>> {
+        self.symbols
+            .get(address)
+            .filter(|entry| entry.size == 0 || address.wrapping_sub(entry.address) < entry.size)
+    }
+
+    /// Get all symbols in the map.
+    #[inline]
+    pub fn symbols(&self) -> &[ObjectMapEntry<'data>] {
+        self.symbols.symbols()
+    }
+
+    /// Get all objects in the map.
+    #[inline]
+    pub fn objects(&self) -> &[&'data [u8]] {
+        &self.objects
+    }
+}
+
+/// A `ObjectMap` entry.
+#[derive(Debug, Default, Clone, Copy, PartialEq, Eq, Hash)]
+pub struct ObjectMapEntry<'data> {
+    address: u64,
+    size: u64,
+    name: &'data [u8],
+    object: usize,
+}
+
+impl<'data> ObjectMapEntry<'data> {
+    /// Get the symbol address.
+    #[inline]
+    pub fn address(&self) -> u64 {
+        self.address
+    }
+
+    /// Get the symbol size.
+    ///
+    /// This may be 0 if the size is unknown.
+    #[inline]
+    pub fn size(&self) -> u64 {
+        self.size
+    }
+
+    /// Get the symbol name.
+    #[inline]
+    pub fn name(&self) -> &'data [u8] {
+        self.name
+    }
+
+    /// Get the index of the object file name.
+    #[inline]
+    pub fn object_index(&self) -> usize {
+        self.object
+    }
+
+    /// Get the object file name.
+    #[inline]
+    pub fn object(&self, map: &ObjectMap<'data>) -> &'data [u8] {
+        map.objects[self.object]
+    }
+}
+
+impl<'data> SymbolMapEntry for ObjectMapEntry<'data> {
+    #[inline]
+    fn address(&self) -> u64 {
+        self.address
+    }
+}
+
+/// An imported symbol.
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub struct Import<'data> {
+    library: ByteString<'data>,
+    // TODO: or ordinal
+    name: ByteString<'data>,
+}
+
+impl<'data> Import<'data> {
+    /// The symbol name.
+    #[inline]
+    pub fn name(&self) -> &'data [u8] {
+        self.name.0
+    }
+
+    /// The name of the library to import the symbol from.
+    #[inline]
+    pub fn library(&self) -> &'data [u8] {
+        self.library.0
+    }
+}
+
+/// An exported symbol.
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub struct Export<'data> {
+    // TODO: and ordinal?
+    name: ByteString<'data>,
+    address: u64,
+}
+
+impl<'data> Export<'data> {
+    /// The symbol name.
+    #[inline]
+    pub fn name(&self) -> &'data [u8] {
+        self.name.0
+    }
+
+    /// The virtual address of the symbol.
+    #[inline]
+    pub fn address(&self) -> u64 {
+        self.address
+    }
+}
+
+/// PDB Information
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub struct CodeView<'data> {
+    guid: [u8; 16],
+    path: ByteString<'data>,
+    age: u32,
+}
+
+impl<'data> CodeView<'data> {
+    /// The path to the PDB as stored in CodeView
+    #[inline]
+    pub fn path(&self) -> &'data [u8] {
+        self.path.0
+    }
+
+    /// The age of the PDB
+    #[inline]
+    pub fn age(&self) -> u32 {
+        self.age
+    }
+
+    /// The GUID of the PDB.
+    #[inline]
+    pub fn guid(&self) -> [u8; 16] {
+        self.guid
+    }
+}
+
+/// The target referenced by a relocation.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+#[non_exhaustive]
+pub enum RelocationTarget {
+    /// The target is a symbol.
+    Symbol(SymbolIndex),
+    /// The target is a section.
+    Section(SectionIndex),
+    /// The offset is an absolute address.
+    Absolute,
+}
+
+/// A relocation entry.
+#[derive(Debug)]
+pub struct Relocation {
+    kind: RelocationKind,
+    encoding: RelocationEncoding,
+    size: u8,
+    target: RelocationTarget,
+    addend: i64,
+    implicit_addend: bool,
+}
+
+impl Relocation {
+    /// The operation used to calculate the result of the relocation.
+    #[inline]
+    pub fn kind(&self) -> RelocationKind {
+        self.kind
+    }
+
+    /// Information about how the result of the relocation operation is encoded in the place.
+    #[inline]
+    pub fn encoding(&self) -> RelocationEncoding {
+        self.encoding
+    }
+
+    /// The size in bits of the place of the relocation.
+    ///
+    /// If 0, then the size is determined by the relocation kind.
+    #[inline]
+    pub fn size(&self) -> u8 {
+        self.size
+    }
+
+    /// The target of the relocation.
+    #[inline]
+    pub fn target(&self) -> RelocationTarget {
+        self.target
+    }
+
+    /// The addend to use in the relocation calculation.
+    #[inline]
+    pub fn addend(&self) -> i64 {
+        self.addend
+    }
+
+    /// Set the addend to use in the relocation calculation.
+    #[inline]
+    pub fn set_addend(&mut self, addend: i64) {
+        self.addend = addend
+    }
+
+    /// Returns true if there is an implicit addend stored in the data at the offset
+    /// to be relocated.
+    #[inline]
+    pub fn has_implicit_addend(&self) -> bool {
+        self.implicit_addend
+    }
+}
+
+/// A data compression format.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+#[non_exhaustive]
+pub enum CompressionFormat {
+    /// The data is uncompressed.
+    None,
+    /// The data is compressed, but the compression format is unknown.
+    Unknown,
+    /// ZLIB/DEFLATE.
+    ///
+    /// Used for ELF compression and GNU compressed debug information.
+    Zlib,
+}
+
+/// A range in a file that may be compressed.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub struct CompressedFileRange {
+    /// The data compression format.
+    pub format: CompressionFormat,
+    /// The file offset of the compressed data.
+    pub offset: u64,
+    /// The compressed data size.
+    pub compressed_size: u64,
+    /// The uncompressed data size.
+    pub uncompressed_size: u64,
+}
+
+impl CompressedFileRange {
+    /// Data that is uncompressed.
+    #[inline]
+    pub fn none(range: Option<(u64, u64)>) -> Self {
+        if let Some((offset, size)) = range {
+            CompressedFileRange {
+                format: CompressionFormat::None,
+                offset,
+                compressed_size: size,
+                uncompressed_size: size,
+            }
+        } else {
+            CompressedFileRange {
+                format: CompressionFormat::None,
+                offset: 0,
+                compressed_size: 0,
+                uncompressed_size: 0,
+            }
+        }
+    }
+
+    /// Convert to `CompressedData` by reading from the file.
+    pub fn data<'data, R: ReadRef<'data>>(self, file: R) -> Result<CompressedData<'data>> {
+        let data = file
+            .read_bytes_at(self.offset, self.compressed_size)
+            .read_error("Invalid compressed data size or offset")?;
+        Ok(CompressedData {
+            format: self.format,
+            data,
+            uncompressed_size: self.uncompressed_size,
+        })
+    }
+}
+
+/// Data that may be compressed.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub struct CompressedData<'data> {
+    /// The data compression format.
+    pub format: CompressionFormat,
+    /// The compressed data.
+    pub data: &'data [u8],
+    /// The uncompressed data size.
+    pub uncompressed_size: u64,
+}
+
+impl<'data> CompressedData<'data> {
+    /// Data that is uncompressed.
+    #[inline]
+    pub fn none(data: &'data [u8]) -> Self {
+        CompressedData {
+            format: CompressionFormat::None,
+            data,
+            uncompressed_size: data.len() as u64,
+        }
+    }
+
+    /// Return the uncompressed data.
+    ///
+    /// Returns an error for invalid data or unsupported compression.
+    /// This includes if the data is compressed but the `compression` feature
+    /// for this crate is disabled.
+    pub fn decompress(self) -> Result<Cow<'data, [u8]>> {
+        match self.format {
+            CompressionFormat::None => Ok(Cow::Borrowed(self.data)),
+            #[cfg(feature = "compression")]
+            CompressionFormat::Zlib => {
+                use core::convert::TryInto;
+                let size = self
+                    .uncompressed_size
+                    .try_into()
+                    .ok()
+                    .read_error("Uncompressed data size is too large.")?;
+                let mut decompressed = Vec::with_capacity(size);
+                let mut decompress = flate2::Decompress::new(true);
+                decompress
+                    .decompress_vec(
+                        self.data,
+                        &mut decompressed,
+                        flate2::FlushDecompress::Finish,
+                    )
+                    .ok()
+                    .read_error("Invalid zlib compressed data")?;
+                Ok(Cow::Owned(decompressed))
+            }
+            _ => Err(Error("Unsupported compressed data.")),
+        }
+    }
+}
diff --git a/third_party/rust/object/src/read/pe/data_directory.rs b/third_party/rust/object/src/read/pe/data_directory.rs
new file mode 100644
index 0000000000..f5d98774e3
--- /dev/null
+++ b/third_party/rust/object/src/read/pe/data_directory.rs
@@ -0,0 +1,211 @@
+use core::slice;
+
+use crate::read::{Error, ReadError, ReadRef, Result};
+use crate::{pe, LittleEndian as LE};
+
+use super::{
+    DelayLoadImportTable, ExportTable, ImportTable, RelocationBlockIterator, ResourceDirectory,
+    SectionTable,
+};
+
+/// The table of data directories in a PE file.
+#[derive(Debug, Clone, Copy)]
+pub struct DataDirectories<'data> {
+    entries: &'data [pe::ImageDataDirectory],
+}
+
+impl<'data> DataDirectories<'data> {
+    /// Parse the data directory table.
+    ///
+    /// `data` must be the remaining optional data following the
+    /// [optional header](pe::ImageOptionalHeader64).  `number` must be from the
+    /// [`number_of_rva_and_sizes`](pe::ImageOptionalHeader64::number_of_rva_and_sizes)
+    /// field of the optional header.
+    pub fn parse(data: &'data [u8], number: u32) -> Result<Self> {
+        let entries = data
+            .read_slice_at(0, number as usize)
+            .read_error("Invalid PE number of RVA and sizes")?;
+        Ok(DataDirectories { entries })
+    }
+
+    /// The number of data directories.
+    #[allow(clippy::len_without_is_empty)]
+    pub fn len(&self) -> usize {
+        self.entries.len()
+    }
+
+    /// Iterator over the data directories.
+    pub fn iter(&self) -> slice::Iter<'data, pe::ImageDataDirectory> {
+        self.entries.iter()
+    }
+
+    /// Iterator which gives the directories as well as their index (one of the IMAGE_DIRECTORY_ENTRY_* constants).
+    pub fn enumerate(&self) -> core::iter::Enumerate<slice::Iter<'data, pe::ImageDataDirectory>> {
+        self.entries.iter().enumerate()
+    }
+
+    /// Returns the data directory at the given index.
+    ///
+    /// Index should be one of the `IMAGE_DIRECTORY_ENTRY_*` constants.
+    ///
+    /// Returns `None` if the index is larger than the table size,
+    /// or if the entry at the index has a zero virtual address.
+    pub fn get(&self, index: usize) -> Option<&'data pe::ImageDataDirectory> {
+        self.entries
+            .get(index)
+            .filter(|d| d.virtual_address.get(LE) != 0)
+    }
+
+    /// Returns the unparsed export directory.
+    ///
+    /// `data` must be the entire file data.
+    pub fn export_directory<R: ReadRef<'data>>(
+        &self,
+        data: R,
+        sections: &SectionTable<'data>,
+    ) -> Result<Option<&'data pe::ImageExportDirectory>> {
+        let data_dir = match self.get(pe::IMAGE_DIRECTORY_ENTRY_EXPORT) {
+            Some(data_dir) => data_dir,
+            None => return Ok(None),
+        };
+        let export_data = data_dir.data(data, sections)?;
+        ExportTable::parse_directory(export_data).map(Some)
+    }
+
+    /// Returns the partially parsed export directory.
+    ///
+    /// `data` must be the entire file data.
+    pub fn export_table<R: ReadRef<'data>>(
+        &self,
+        data: R,
+        sections: &SectionTable<'data>,
+    ) -> Result<Option<ExportTable<'data>>> {
+        let data_dir = match self.get(pe::IMAGE_DIRECTORY_ENTRY_EXPORT) {
+            Some(data_dir) => data_dir,
+            None => return Ok(None),
+        };
+        let export_va = data_dir.virtual_address.get(LE);
+        let export_data = data_dir.data(data, sections)?;
+        ExportTable::parse(export_data, export_va).map(Some)
+    }
+
+    /// Returns the partially parsed import directory.
+    ///
+    /// `data` must be the entire file data.
+    pub fn import_table<R: ReadRef<'data>>(
+        &self,
+        data: R,
+        sections: &SectionTable<'data>,
+    ) -> Result<Option<ImportTable<'data>>> {
+        let data_dir = match self.get(pe::IMAGE_DIRECTORY_ENTRY_IMPORT) {
+            Some(data_dir) => data_dir,
+            None => return Ok(None),
+        };
+        let import_va = data_dir.virtual_address.get(LE);
+        let (section_data, section_va) = sections
+            .pe_data_containing(data, import_va)
+            .read_error("Invalid import data dir virtual address")?;
+        Ok(Some(ImportTable::new(section_data, section_va, import_va)))
+    }
+
+    /// Returns the partially parsed delay-load import directory.
+    ///
+    /// `data` must be the entire file data.
+    pub fn delay_load_import_table<R: ReadRef<'data>>(
+        &self,
+        data: R,
+        sections: &SectionTable<'data>,
+    ) -> Result<Option<DelayLoadImportTable<'data>>> {
+        let data_dir = match self.get(pe::IMAGE_DIRECTORY_ENTRY_DELAY_IMPORT) {
+            Some(data_dir) => data_dir,
+            None => return Ok(None),
+        };
+        let import_va = data_dir.virtual_address.get(LE);
+        let (section_data, section_va) = sections
+            .pe_data_containing(data, import_va)
+            .read_error("Invalid import data dir virtual address")?;
+        Ok(Some(DelayLoadImportTable::new(
+            section_data,
+            section_va,
+            import_va,
+        )))
+    }
+
+    /// Returns the blocks in the base relocation directory.
+    ///
+    /// `data` must be the entire file data.
+    pub fn relocation_blocks<R: ReadRef<'data>>(
+        &self,
+        data: R,
+        sections: &SectionTable<'data>,
+    ) -> Result<Option<RelocationBlockIterator<'data>>> {
+        let data_dir = match self.get(pe::IMAGE_DIRECTORY_ENTRY_BASERELOC) {
+            Some(data_dir) => data_dir,
+            None => return Ok(None),
+        };
+        let reloc_data = data_dir.data(data, sections)?;
+        Ok(Some(RelocationBlockIterator::new(reloc_data)))
+    }
+
+    /// Returns the resource directory.
+    ///
+    /// `data` must be the entire file data.
+    pub fn resource_directory<R: ReadRef<'data>>(
+        &self,
+        data: R,
+        sections: &SectionTable<'data>,
+    ) -> Result<Option<ResourceDirectory<'data>>> {
+        let data_dir = match self.get(pe::IMAGE_DIRECTORY_ENTRY_RESOURCE) {
+            Some(data_dir) => data_dir,
+            None => return Ok(None),
+        };
+        let rsrc_data = data_dir.data(data, sections)?;
+        Ok(Some(ResourceDirectory::new(rsrc_data)))
+    }
+}
+
+impl pe::ImageDataDirectory {
+    /// Return the virtual address range of this directory entry.
+    pub fn address_range(&self) -> (u32, u32) {
+        (self.virtual_address.get(LE), self.size.get(LE))
+    }
+
+    /// Return the file offset and size of this directory entry.
+    ///
+    /// This function has some limitations:
+    /// - It requires that the data is contained in a single section.
+    /// - It uses the size field of the directory entry, which is
+    /// not desirable for all data directories.
+    /// - It uses the `virtual_address` of the directory entry as an address,
+    /// which is not valid for `IMAGE_DIRECTORY_ENTRY_SECURITY`.
+    pub fn file_range<'data>(&self, sections: &SectionTable<'data>) -> Result<(u32, u32)> {
+        let (offset, section_size) = sections
+            .pe_file_range_at(self.virtual_address.get(LE))
+            .read_error("Invalid data dir virtual address")?;
+        let size = self.size.get(LE);
+        if size > section_size {
+            return Err(Error("Invalid data dir size"));
+        }
+        Ok((offset, size))
+    }
+
+    /// Get the data referenced by this directory entry.
+    ///
+    /// This function has some limitations:
+    /// - It requires that the data is contained in a single section.
+    /// - It uses the size field of the directory entry, which is
+    /// not desirable for all data directories.
+    /// - It uses the `virtual_address` of the directory entry as an address,
+    /// which is not valid for `IMAGE_DIRECTORY_ENTRY_SECURITY`.
+    pub fn data<'data, R: ReadRef<'data>>(
+        &self,
+        data: R,
+        sections: &SectionTable<'data>,
+    ) -> Result<&'data [u8]> {
+        sections
+            .pe_data_at(data, self.virtual_address.get(LE))
+            .read_error("Invalid data dir virtual address")?
+            .get(..self.size.get(LE) as usize)
+            .read_error("Invalid data dir size")
+    }
+}
diff --git a/third_party/rust/object/src/read/pe/export.rs b/third_party/rust/object/src/read/pe/export.rs
new file mode 100644
index 0000000000..88dc78d50b
--- /dev/null
+++ b/third_party/rust/object/src/read/pe/export.rs
@@ -0,0 +1,331 @@
+use alloc::vec::Vec;
+use core::fmt::Debug;
+
+use crate::read::{ByteString, Bytes, Error, ReadError, ReadRef, Result};
+use crate::{pe, LittleEndian as LE, U16Bytes, U32Bytes};
+
+/// Where an export is pointing to.
+#[derive(Clone, Copy)]
+pub enum ExportTarget<'data> {
+    /// The address of the export, relative to the image base.
+    Address(u32),
+    /// Forwarded to an export ordinal in another DLL.
+    ///
+    /// This gives the name of the DLL, and the ordinal.
+    ForwardByOrdinal(&'data [u8], u32),
+    /// Forwarded to an export name in another DLL.
+    ///
+    /// This gives the name of the DLL, and the export name.
+    ForwardByName(&'data [u8], &'data [u8]),
+}
+
+impl<'data> ExportTarget<'data> {
+    /// Returns true if the target is an address.
+    pub fn is_address(&self) -> bool {
+        match self {
+            ExportTarget::Address(_) => true,
+            _ => false,
+        }
+    }
+
+    /// Returns true if the export is forwarded to another DLL.
+    pub fn is_forward(&self) -> bool {
+        !self.is_address()
+    }
+}
+
+/// An export from a PE file.
+///
+/// There are multiple kinds of PE exports (with or without a name, and local or forwarded).
+#[derive(Clone, Copy)]
+pub struct Export<'data> {
+    /// The ordinal of the export.
+    ///
+    /// These are sequential, starting at a base specified in the DLL.
+    pub ordinal: u32,
+    /// The name of the export, if known.
+    pub name: Option<&'data [u8]>,
+    /// The target of this export.
+    pub target: ExportTarget<'data>,
+}
+
+impl<'a> Debug for Export<'a> {
+    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::result::Result<(), core::fmt::Error> {
+        f.debug_struct("Export")
+            .field("ordinal", &self.ordinal)
+            .field("name", &self.name.map(ByteString))
+            .field("target", &self.target)
+            .finish()
+    }
+}
+
+impl<'a> Debug for ExportTarget<'a> {
+    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::result::Result<(), core::fmt::Error> {
+        match self {
+            ExportTarget::Address(address) => write!(f, "Address({:#x})", address),
+            ExportTarget::ForwardByOrdinal(library, ordinal) => write!(
+                f,
+                "ForwardByOrdinal({:?}.#{})",
+                ByteString(library),
+                ordinal
+            ),
+            ExportTarget::ForwardByName(library, name) => write!(
+                f,
+                "ForwardByName({:?}.{:?})",
+                ByteString(library),
+                ByteString(name)
+            ),
+        }
+    }
+}
+
+/// A partially parsed PE export table.
+#[derive(Debug, Clone)]
+pub struct ExportTable<'data> {
+    data: Bytes<'data>,
+    virtual_address: u32,
+    directory: &'data pe::ImageExportDirectory,
+    addresses: &'data [U32Bytes<LE>],
+    names: &'data [U32Bytes<LE>],
+    name_ordinals: &'data [U16Bytes<LE>],
+}
+
+impl<'data> ExportTable<'data> {
+    /// Parse the export table given its section data and address.
+    pub fn parse(data: &'data [u8], virtual_address: u32) -> Result<Self> {
+        let directory = Self::parse_directory(data)?;
+        let data = Bytes(data);
+
+        let mut addresses = &[][..];
+        let address_of_functions = directory.address_of_functions.get(LE);
+        if address_of_functions != 0 {
+            addresses = data
+                .read_slice_at::<U32Bytes<_>>(
+                    address_of_functions.wrapping_sub(virtual_address) as usize,
+                    directory.number_of_functions.get(LE) as usize,
+                )
+                .read_error("Invalid PE export address table")?;
+        }
+
+        let mut names = &[][..];
+        let mut name_ordinals = &[][..];
+        let address_of_names = directory.address_of_names.get(LE);
+        let address_of_name_ordinals = directory.address_of_name_ordinals.get(LE);
+        if address_of_names != 0 {
+            if address_of_name_ordinals == 0 {
+                return Err(Error("Missing PE export ordinal table"));
+            }
+
+            let number = directory.number_of_names.get(LE) as usize;
+            names = data
+                .read_slice_at::<U32Bytes<_>>(
+                    address_of_names.wrapping_sub(virtual_address) as usize,
+                    number,
+                )
+                .read_error("Invalid PE export name pointer table")?;
+            name_ordinals = data
+                .read_slice_at::<U16Bytes<_>>(
+                    address_of_name_ordinals.wrapping_sub(virtual_address) as usize,
+                    number,
+                )
+                .read_error("Invalid PE export ordinal table")?;
+        }
+
+        Ok(ExportTable {
+            data,
+            virtual_address,
+            directory,
+            addresses,
+            names,
+            name_ordinals,
+        })
+    }
+
+    /// Parse the export directory given its section data.
+    pub fn parse_directory(data: &'data [u8]) -> Result<&'data pe::ImageExportDirectory> {
+        data.read_at::<pe::ImageExportDirectory>(0)
+            .read_error("Invalid PE export dir size")
+    }
+
+    /// Returns the header of the export table.
+    pub fn directory(&self) -> &'data pe::ImageExportDirectory {
+        self.directory
+    }
+
+    /// Returns the base value of ordinals.
+    ///
+    /// Adding this to an address index will give an ordinal.
+    pub fn ordinal_base(&self) -> u32 {
+        self.directory.base.get(LE)
+    }
+
+    /// Returns the unparsed address table.
+    ///
+    /// An address table entry may be a local address, or the address of a forwarded export entry.
+    /// See [`Self::is_forward`] and [`Self::target_from_address`].
+    pub fn addresses(&self) -> &'data [U32Bytes<LE>] {
+        self.addresses
+    }
+
+    /// Returns the unparsed name pointer table.
+    ///
+    /// A name pointer table entry can be used with [`Self::name_from_pointer`].
+    pub fn name_pointers(&self) -> &'data [U32Bytes<LE>] {
+        self.names
+    }
+
+    /// Returns the unparsed ordinal table.
+    ///
+    /// An ordinal table entry is a 0-based index into the address table.
+    /// See [`Self::address_by_index`] and [`Self::target_by_index`].
+    pub fn name_ordinals(&self) -> &'data [U16Bytes<LE>] {
+        self.name_ordinals
+    }
+
+    /// Returns an iterator for the entries in the name pointer table and ordinal table.
+    ///
+    /// A name pointer table entry can be used with [`Self::name_from_pointer`].
+    ///
+    /// An ordinal table entry is a 0-based index into the address table.
+    /// See [`Self::address_by_index`] and [`Self::target_by_index`].
+    pub fn name_iter(&self) -> impl Iterator<Item = (u32, u16)> + 'data {
+        self.names
+            .iter()
+            .map(|x| x.get(LE))
+            .zip(self.name_ordinals.iter().map(|x| x.get(LE)))
+    }
+
+    /// Returns the export address table entry at the given address index.
+    ///
+    /// This may be a local address, or the address of a forwarded export entry.
+    /// See [`Self::is_forward`] and [`Self::target_from_address`].
+    ///
+    /// `index` is a 0-based index into the export address table.
+    pub fn address_by_index(&self, index: u32) -> Result<u32> {
+        Ok(self
+            .addresses
+            .get(index as usize)
+            .read_error("Invalid PE export address index")?
+            .get(LE))
+    }
+
+    /// Returns the export address table entry at the given ordinal.
+    ///
+    /// This may be a local address, or the address of a forwarded export entry.
+    /// See [`Self::is_forward`] and [`Self::target_from_address`].
+    pub fn address_by_ordinal(&self, ordinal: u32) -> Result<u32> {
+        self.address_by_index(ordinal.wrapping_sub(self.ordinal_base()))
+    }
+
+    /// Returns the target of the export at the given address index.
+    ///
+    /// `index` is a 0-based index into the export address table.
+    pub fn target_by_index(&self, index: u32) -> Result<ExportTarget<'data>> {
+        self.target_from_address(self.address_by_index(index)?)
+    }
+
+    /// Returns the target of the export at the given ordinal.
+    pub fn target_by_ordinal(&self, ordinal: u32) -> Result<ExportTarget<'data>> {
+        self.target_from_address(self.address_by_ordinal(ordinal)?)
+    }
+
+    /// Convert an export address table entry into a target.
+    pub fn target_from_address(&self, address: u32) -> Result<ExportTarget<'data>> {
+        Ok(if let Some(forward) = self.forward_string(address)? {
+            let i = forward
+                .iter()
+                .position(|x| *x == b'.')
+                .read_error("Missing PE forwarded export separator")?;
+            let library = &forward[..i];
+            match &forward[i + 1..] {
+                [b'#', digits @ ..] => {
+                    let ordinal =
+                        parse_ordinal(digits).read_error("Invalid PE forwarded export ordinal")?;
+                    ExportTarget::ForwardByOrdinal(library, ordinal)
+                }
+                [] => {
+                    return Err(Error("Missing PE forwarded export name"));
+                }
+                name => ExportTarget::ForwardByName(library, name),
+            }
+        } else {
+            ExportTarget::Address(address)
+        })
+    }
+
+    fn forward_offset(&self, address: u32) -> Option<usize> {
+        let offset = address.wrapping_sub(self.virtual_address) as usize;
+        if offset < self.data.len() {
+            Some(offset)
+        } else {
+            None
+        }
+    }
+
+    /// Return true if the export address table entry is a forward.
+    pub fn is_forward(&self, address: u32) -> bool {
+        self.forward_offset(address).is_some()
+    }
+
+    /// Return the forward string if the export address table entry is a forward.
+    pub fn forward_string(&self, address: u32) -> Result<Option<&'data [u8]>> {
+        if let Some(offset) = self.forward_offset(address) {
+            self.data
+                .read_string_at(offset)
+                .read_error("Invalid PE forwarded export address")
+                .map(Some)
+        } else {
+            Ok(None)
+        }
+    }
+
+    /// Convert an export name pointer table entry into a name.
+    pub fn name_from_pointer(&self, name_pointer: u32) -> Result<&'data [u8]> {
+        let offset = name_pointer.wrapping_sub(self.virtual_address);
+        self.data
+            .read_string_at(offset as usize)
+            .read_error("Invalid PE export name pointer")
+    }
+
+    /// Returns the parsed exports in this table.
+    pub fn exports(&self) -> Result<Vec<Export<'data>>> {
+        // First, let's list all exports.
+        let mut exports = Vec::new();
+        let ordinal_base = self.ordinal_base();
+        for (i, address) in self.addresses.iter().enumerate() {
+            // Convert from an array index to an ordinal.
+            let ordinal = ordinal_base.wrapping_add(i as u32);
+            let target = self.target_from_address(address.get(LE))?;
+            exports.push(Export {
+                ordinal,
+                target,
+                // Might be populated later.
+                name: None,
+            });
+        }
+
+        // Now, check whether some (or all) of them have an associated name.
+        // `ordinal_index` is a 0-based index into `addresses`.
+        for (name_pointer, ordinal_index) in self.name_iter() {
+            let name = self.name_from_pointer(name_pointer)?;
+            exports
+                .get_mut(ordinal_index as usize)
+                .read_error("Invalid PE export ordinal")?
+                .name = Some(name);
+        }
+
+        Ok(exports)
+    }
+}
+
+fn parse_ordinal(digits: &[u8]) -> Option<u32> {
+    if digits.is_empty() {
+        return None;
+    }
+    let mut result: u32 = 0;
+    for &c in digits {
+        let x = (c as char).to_digit(10)?;
+        result = result.checked_mul(10)?.checked_add(x)?;
+    }
+    Some(result)
+}
diff --git a/third_party/rust/object/src/read/pe/file.rs b/third_party/rust/object/src/read/pe/file.rs
new file mode 100644
index 0000000000..8dd85131a4
--- /dev/null
+++ b/third_party/rust/object/src/read/pe/file.rs
@@ -0,0 +1,1029 @@
+use alloc::vec::Vec;
+use core::fmt::Debug;
+use core::{mem, str};
+
+use core::convert::TryInto;
+
+use crate::read::coff::{CoffCommon, CoffSymbol, CoffSymbolIterator, CoffSymbolTable, SymbolTable};
+use crate::read::{
+    self, Architecture, ComdatKind, Error, Export, FileFlags, Import, NoDynamicRelocationIterator,
+    Object, ObjectComdat, ObjectKind, ReadError, ReadRef, Result, SectionIndex, SymbolIndex,
+};
+use crate::{pe, ByteString, Bytes, CodeView, LittleEndian as LE, Pod, U32};
+
+use super::{
+    DataDirectories, ExportTable, ImageThunkData, ImportTable, PeSection, PeSectionIterator,
+    PeSegment, PeSegmentIterator, RichHeaderInfo, SectionTable,
+};
+
+/// A PE32 (32-bit) image file.
+pub type PeFile32<'data, R = &'data [u8]> = PeFile<'data, pe::ImageNtHeaders32, R>;
+/// A PE32+ (64-bit) image file.
+pub type PeFile64<'data, R = &'data [u8]> = PeFile<'data, pe::ImageNtHeaders64, R>;
+
+/// A PE object file.
+#[derive(Debug)]
+pub struct PeFile<'data, Pe, R = &'data [u8]>
+where
+    Pe: ImageNtHeaders,
+    R: ReadRef<'data>,
+{
+    pub(super) dos_header: &'data pe::ImageDosHeader,
+    pub(super) nt_headers: &'data Pe,
+    pub(super) data_directories: DataDirectories<'data>,
+    pub(super) common: CoffCommon<'data, R>,
+    pub(super) data: R,
+}
+
+impl<'data, Pe, R> PeFile<'data, Pe, R>
+where
+    Pe: ImageNtHeaders,
+    R: ReadRef<'data>,
+{
+    /// Parse the raw PE file data.
+    pub fn parse(data: R) -> Result<Self> {
+        let dos_header = pe::ImageDosHeader::parse(data)?;
+        let mut offset = dos_header.nt_headers_offset().into();
+        let (nt_headers, data_directories) = Pe::parse(data, &mut offset)?;
+        let sections = nt_headers.sections(data, offset)?;
+        let coff_symbols = nt_headers.symbols(data);
+        let image_base = nt_headers.optional_header().image_base();
+
+        Ok(PeFile {
+            dos_header,
+            nt_headers,
+            data_directories,
+            common: CoffCommon {
+                sections,
+                // The PE file format deprecates the COFF symbol table (https://docs.microsoft.com/en-us/windows/win32/debug/pe-format#coff-file-header-object-and-image)
+                // We do not want to prevent parsing the rest of the PE file for a corrupt COFF header, but rather return an empty symbol table
+                symbols: coff_symbols.unwrap_or_default(),
+                image_base,
+            },
+            data,
+        })
+    }
+
+    /// Returns this binary data.
+    pub fn data(&self) -> R {
+        self.data
+    }
+
+    /// Return the DOS header of this file.
+    pub fn dos_header(&self) -> &'data pe::ImageDosHeader {
+        self.dos_header
+    }
+
+    /// Return the NT Headers of this file.
+    pub fn nt_headers(&self) -> &'data Pe {
+        self.nt_headers
+    }
+
+    /// Returns information about the rich header of this file (if any).
+    pub fn rich_header_info(&self) -> Option<RichHeaderInfo> {
+        RichHeaderInfo::parse(self.data, self.dos_header.nt_headers_offset().into())
+    }
+
+    /// Returns the section table of this binary.
+    pub fn section_table(&self) -> SectionTable<'data> {
+        self.common.sections
+    }
+
+    /// Returns the data directories of this file.
+    pub fn data_directories(&self) -> DataDirectories<'data> {
+        self.data_directories
+    }
+
+    /// Returns the data directory at the given index.
+    pub fn data_directory(&self, id: usize) -> Option<&'data pe::ImageDataDirectory> {
+        self.data_directories.get(id)
+    }
+
+    /// Returns the export table of this file.
+    ///
+    /// The export table is located using the data directory.
+    pub fn export_table(&self) -> Result<Option<ExportTable<'data>>> {
+        self.data_directories
+            .export_table(self.data, &self.common.sections)
+    }
+
+    /// Returns the import table of this file.
+    ///
+    /// The import table is located using the data directory.
+    pub fn import_table(&self) -> Result<Option<ImportTable<'data>>> {
+        self.data_directories
+            .import_table(self.data, &self.common.sections)
+    }
+
+    pub(super) fn section_alignment(&self) -> u64 {
+        u64::from(self.nt_headers.optional_header().section_alignment())
+    }
+}
+
+impl<'data, Pe, R> read::private::Sealed for PeFile<'data, Pe, R>
+where
+    Pe: ImageNtHeaders,
+    R: ReadRef<'data>,
+{
+}
+
+impl<'data, 'file, Pe, R> Object<'data, 'file> for PeFile<'data, Pe, R>
+where
+    'data: 'file,
+    Pe: ImageNtHeaders,
+    R: 'file + ReadRef<'data>,
+{
+    type Segment = PeSegment<'data, 'file, Pe, R>;
+    type SegmentIterator = PeSegmentIterator<'data, 'file, Pe, R>;
+    type Section = PeSection<'data, 'file, Pe, R>;
+    type SectionIterator = PeSectionIterator<'data, 'file, Pe, R>;
+    type Comdat = PeComdat<'data, 'file, Pe, R>;
+    type ComdatIterator = PeComdatIterator<'data, 'file, Pe, R>;
+    type Symbol = CoffSymbol<'data, 'file, R>;
+    type SymbolIterator = CoffSymbolIterator<'data, 'file, R>;
+    type SymbolTable = CoffSymbolTable<'data, 'file, R>;
+    type DynamicRelocationIterator = NoDynamicRelocationIterator;
+
+    fn architecture(&self) -> Architecture {
+        match self.nt_headers.file_header().machine.get(LE) {
+            pe::IMAGE_FILE_MACHINE_ARMNT => Architecture::Arm,
+            pe::IMAGE_FILE_MACHINE_ARM64 => Architecture::Aarch64,
+            pe::IMAGE_FILE_MACHINE_I386 => Architecture::I386,
+            pe::IMAGE_FILE_MACHINE_AMD64 => Architecture::X86_64,
+            _ => Architecture::Unknown,
+        }
+    }
+
+    #[inline]
+    fn is_little_endian(&self) -> bool {
+        // Only little endian is supported.
+        true
+    }
+
+    #[inline]
+    fn is_64(&self) -> bool {
+        self.nt_headers.is_type_64()
+    }
+
+    fn kind(&self) -> ObjectKind {
+        let characteristics = self.nt_headers.file_header().characteristics.get(LE);
+        if characteristics & pe::IMAGE_FILE_DLL != 0 {
+            ObjectKind::Dynamic
+        } else if characteristics & pe::IMAGE_FILE_SYSTEM != 0 {
+            ObjectKind::Unknown
+        } else {
+            ObjectKind::Executable
+        }
+    }
+
+    fn segments(&'file self) -> PeSegmentIterator<'data, 'file, Pe, R> {
+        PeSegmentIterator {
+            file: self,
+            iter: self.common.sections.iter(),
+        }
+    }
+
+    fn section_by_name_bytes(
+        &'file self,
+        section_name: &[u8],
+    ) -> Option<PeSection<'data, 'file, Pe, R>> {
+        self.common
+            .sections
+            .section_by_name(self.common.symbols.strings(), section_name)
+            .map(|(index, section)| PeSection {
+                file: self,
+                index: SectionIndex(index),
+                section,
+            })
+    }
+
+    fn section_by_index(
+        &'file self,
+        index: SectionIndex,
+    ) -> Result<PeSection<'data, 'file, Pe, R>> {
+        let section = self.common.sections.section(index.0)?;
+        Ok(PeSection {
+            file: self,
+            index,
+            section,
+        })
+    }
+
+    fn sections(&'file self) -> PeSectionIterator<'data, 'file, Pe, R> {
+        PeSectionIterator {
+            file: self,
+            iter: self.common.sections.iter().enumerate(),
+        }
+    }
+
+    fn comdats(&'file self) -> PeComdatIterator<'data, 'file, Pe, R> {
+        PeComdatIterator { file: self }
+    }
+
+    fn symbol_by_index(&'file self, index: SymbolIndex) -> Result<CoffSymbol<'data, 'file, R>> {
+        let symbol = self.common.symbols.symbol(index.0)?;
+        Ok(CoffSymbol {
+            file: &self.common,
+            index,
+            symbol,
+        })
+    }
+
+    fn symbols(&'file self) -> CoffSymbolIterator<'data, 'file, R> {
+        CoffSymbolIterator {
+            file: &self.common,
+            index: 0,
+        }
+    }
+
+    fn symbol_table(&'file self) -> Option<CoffSymbolTable<'data, 'file, R>> {
+        Some(CoffSymbolTable { file: &self.common })
+    }
+
+    fn dynamic_symbols(&'file self) -> CoffSymbolIterator<'data, 'file, R> {
+        CoffSymbolIterator {
+            file: &self.common,
+            // Hack: don't return any.
+            index: self.common.symbols.len(),
+        }
+    }
+
+    fn dynamic_symbol_table(&'file self) -> Option<CoffSymbolTable<'data, 'file, R>> {
+        None
+    }
+
+    fn dynamic_relocations(&'file self) -> Option<NoDynamicRelocationIterator> {
+        None
+    }
+
+    fn imports(&self) -> Result<Vec<Import<'data>>> {
+        let mut imports = Vec::new();
+        if let Some(import_table) = self.import_table()? {
+            let mut import_descs = import_table.descriptors()?;
+            while let Some(import_desc) = import_descs.next()? {
+                let library = import_table.name(import_desc.name.get(LE))?;
+                let mut first_thunk = import_desc.original_first_thunk.get(LE);
+                if first_thunk == 0 {
+                    first_thunk = import_desc.first_thunk.get(LE);
+                }
+                let mut thunks = import_table.thunks(first_thunk)?;
+                while let Some(thunk) = thunks.next::<Pe>()? {
+                    if !thunk.is_ordinal() {
+                        let (_hint, name) = import_table.hint_name(thunk.address())?;
+                        imports.push(Import {
+                            library: ByteString(library),
+                            name: ByteString(name),
+                        });
+                    }
+                }
+            }
+        }
+        Ok(imports)
+    }
+
+    fn exports(&self) -> Result<Vec<Export<'data>>> {
+        let mut exports = Vec::new();
+        if let Some(export_table) = self.export_table()? {
+            for (name_pointer, address_index) in export_table.name_iter() {
+                let name = export_table.name_from_pointer(name_pointer)?;
+                let address = export_table.address_by_index(address_index.into())?;
+                if !export_table.is_forward(address) {
+                    exports.push(Export {
+                        name: ByteString(name),
+                        address: self.common.image_base.wrapping_add(address.into()),
+                    })
+                }
+            }
+        }
+        Ok(exports)
+    }
+
+    fn pdb_info(&self) -> Result<Option<CodeView>> {
+        let data_dir = match self.data_directory(pe::IMAGE_DIRECTORY_ENTRY_DEBUG) {
+            Some(data_dir) => data_dir,
+            None => return Ok(None),
+        };
+        let debug_data = data_dir.data(self.data, &self.common.sections).map(Bytes)?;
+        let debug_data_size = data_dir.size.get(LE) as usize;
+
+        let count = debug_data_size / mem::size_of::<pe::ImageDebugDirectory>();
+        let rem = debug_data_size % mem::size_of::<pe::ImageDebugDirectory>();
+        if rem != 0 || count < 1 {
+            return Err(Error("Invalid PE debug dir size"));
+        }
+
+        let debug_dirs = debug_data
+            .read_slice_at::<pe::ImageDebugDirectory>(0, count)
+            .read_error("Invalid PE debug dir size")?;
+
+        for debug_dir in debug_dirs {
+            if debug_dir.typ.get(LE) != pe::IMAGE_DEBUG_TYPE_CODEVIEW {
+                continue;
+            }
+
+            let info = self
+                .data
+                .read_slice_at::<u8>(
+                    debug_dir.pointer_to_raw_data.get(LE) as u64,
+                    debug_dir.size_of_data.get(LE) as usize,
+                )
+                .read_error("Invalid CodeView Info address")?;
+
+            let mut info = Bytes(info);
+
+            let sig = info
+                .read_bytes(4)
+                .read_error("Invalid CodeView signature")?;
+            if sig.0 != b"RSDS" {
+                continue;
+            }
+
+            let guid: [u8; 16] = info
+                .read_bytes(16)
+                .read_error("Invalid CodeView GUID")?
+                .0
+                .try_into()
+                .unwrap();
+
+            let age = info.read::<U32<LE>>().read_error("Invalid CodeView Age")?;
+
+            let path = info
+                .read_string()
+                .read_error("Invalid CodeView file path")?;
+
+            return Ok(Some(CodeView {
+                path: ByteString(path),
+                guid,
+                age: age.get(LE),
+            }));
+        }
+        Ok(None)
+    }
+
+    fn has_debug_symbols(&self) -> bool {
+        self.section_by_name(".debug_info").is_some()
+    }
+
+    fn relative_address_base(&self) -> u64 {
+        self.common.image_base
+    }
+
+    fn entry(&self) -> u64 {
+        u64::from(self.nt_headers.optional_header().address_of_entry_point())
+            .wrapping_add(self.common.image_base)
+    }
+
+    fn flags(&self) -> FileFlags {
+        FileFlags::Coff {
+            characteristics: self.nt_headers.file_header().characteristics.get(LE),
+        }
+    }
+}
+
+/// An iterator over the COMDAT section groups of a `PeFile32`.
+pub type PeComdatIterator32<'data, 'file, R = &'data [u8]> =
+    PeComdatIterator<'data, 'file, pe::ImageNtHeaders32, R>;
+/// An iterator over the COMDAT section groups of a `PeFile64`.
+pub type PeComdatIterator64<'data, 'file, R = &'data [u8]> =
+    PeComdatIterator<'data, 'file, pe::ImageNtHeaders64, R>;
+
+/// An iterator over the COMDAT section groups of a `PeFile`.
+#[derive(Debug)]
+pub struct PeComdatIterator<'data, 'file, Pe, R = &'data [u8]>
+where
+    Pe: ImageNtHeaders,
+    R: ReadRef<'data>,
+{
+    #[allow(unused)]
+    file: &'file PeFile<'data, Pe, R>,
+}
+
+impl<'data, 'file, Pe, R> Iterator for PeComdatIterator<'data, 'file, Pe, R>
+where
+    Pe: ImageNtHeaders,
+    R: ReadRef<'data>,
+{
+    type Item = PeComdat<'data, 'file, Pe, R>;
+
+    #[inline]
+    fn next(&mut self) -> Option<Self::Item> {
+        None
+    }
+}
+
+/// A COMDAT section group of a `PeFile32`.
+pub type PeComdat32<'data, 'file, R = &'data [u8]> =
+    PeComdat<'data, 'file, pe::ImageNtHeaders32, R>;
+/// A COMDAT section group of a `PeFile64`.
+pub type PeComdat64<'data, 'file, R = &'data [u8]> =
+    PeComdat<'data, 'file, pe::ImageNtHeaders64, R>;
+
+/// A COMDAT section group of a `PeFile`.
+#[derive(Debug)]
+pub struct PeComdat<'data, 'file, Pe, R = &'data [u8]>
+where
+    Pe: ImageNtHeaders,
+    R: ReadRef<'data>,
+{
+    #[allow(unused)]
+    file: &'file PeFile<'data, Pe, R>,
+}
+
+impl<'data, 'file, Pe, R> read::private::Sealed for PeComdat<'data, 'file, Pe, R>
+where
+    Pe: ImageNtHeaders,
+    R: ReadRef<'data>,
+{
+}
+
+impl<'data, 'file, Pe, R> ObjectComdat<'data> for PeComdat<'data, 'file, Pe, R>
+where
+    Pe: ImageNtHeaders,
+    R: ReadRef<'data>,
+{
+    type SectionIterator = PeComdatSectionIterator<'data, 'file, Pe, R>;
+
+    #[inline]
+    fn kind(&self) -> ComdatKind {
+        unreachable!();
+    }
+
+    #[inline]
+    fn symbol(&self) -> SymbolIndex {
+        unreachable!();
+    }
+
+    #[inline]
+    fn name_bytes(&self) -> Result<&[u8]> {
+        unreachable!();
+    }
+
+    #[inline]
+    fn name(&self) -> Result<&str> {
+        unreachable!();
+    }
+
+    #[inline]
+    fn sections(&self) -> Self::SectionIterator {
+        unreachable!();
+    }
+}
+
+/// An iterator over the sections in a COMDAT section group of a `PeFile32`.
+pub type PeComdatSectionIterator32<'data, 'file, R = &'data [u8]> =
+    PeComdatSectionIterator<'data, 'file, pe::ImageNtHeaders32, R>;
+/// An iterator over the sections in a COMDAT section group of a `PeFile64`.
+pub type PeComdatSectionIterator64<'data, 'file, R = &'data [u8]> =
+    PeComdatSectionIterator<'data, 'file, pe::ImageNtHeaders64, R>;
+
+/// An iterator over the sections in a COMDAT section group of a `PeFile`.
+#[derive(Debug)]
+pub struct PeComdatSectionIterator<'data, 'file, Pe, R = &'data [u8]>
+where
+    Pe: ImageNtHeaders,
+    R: ReadRef<'data>,
+{
+    #[allow(unused)]
+    file: &'file PeFile<'data, Pe, R>,
+}
+
+impl<'data, 'file, Pe, R> Iterator for PeComdatSectionIterator<'data, 'file, Pe, R>
+where
+    Pe: ImageNtHeaders,
+    R: ReadRef<'data>,
+{
+    type Item = SectionIndex;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        None
+    }
+}
+
+impl pe::ImageDosHeader {
+    /// Read the DOS header.
+    ///
+    /// Also checks that the `e_magic` field in the header is valid.
+    pub fn parse<'data, R: ReadRef<'data>>(data: R) -> read::Result<&'data Self> {
+        // DOS header comes first.
+        let dos_header = data
+            .read_at::<pe::ImageDosHeader>(0)
+            .read_error("Invalid DOS header size or alignment")?;
+        if dos_header.e_magic.get(LE) != pe::IMAGE_DOS_SIGNATURE {
+            return Err(Error("Invalid DOS magic"));
+        }
+        Ok(dos_header)
+    }
+
+    /// Return the file offset of the nt_headers.
+    #[inline]
+    pub fn nt_headers_offset(&self) -> u32 {
+        self.e_lfanew.get(LE)
+    }
+}
+
+/// Find the optional header and read the `optional_header.magic`.
+///
+/// It can be useful to know this magic value before trying to
+/// fully parse the NT headers.
+pub fn optional_header_magic<'data, R: ReadRef<'data>>(data: R) -> Result<u16> {
+    let dos_header = pe::ImageDosHeader::parse(data)?;
+    // NT headers are at an offset specified in the DOS header.
+    let offset = dos_header.nt_headers_offset().into();
+    // It doesn't matter which NT header type is used for the purpose
+    // of reading the optional header magic.
+    let nt_headers = data
+        .read_at::<pe::ImageNtHeaders32>(offset)
+        .read_error("Invalid NT headers offset, size, or alignment")?;
+    if nt_headers.signature() != pe::IMAGE_NT_SIGNATURE {
+        return Err(Error("Invalid PE magic"));
+    }
+    Ok(nt_headers.optional_header().magic())
+}
+
+/// A trait for generic access to `ImageNtHeaders32` and `ImageNtHeaders64`.
+#[allow(missing_docs)]
+pub trait ImageNtHeaders: Debug + Pod {
+    type ImageOptionalHeader: ImageOptionalHeader;
+    type ImageThunkData: ImageThunkData;
+
+    /// Return true if this type is a 64-bit header.
+    ///
+    /// This is a property of the type, not a value in the header data.
+    fn is_type_64(&self) -> bool;
+
+    /// Return true if the magic field in the optional header is valid.
+    fn is_valid_optional_magic(&self) -> bool;
+
+    /// Return the signature
+    fn signature(&self) -> u32;
+
+    /// Return the file header.
+    fn file_header(&self) -> &pe::ImageFileHeader;
+
+    /// Return the optional header.
+    fn optional_header(&self) -> &Self::ImageOptionalHeader;
+
+    // Provided methods.
+
+    /// Read the NT headers, including the data directories.
+    ///
+    /// `data` must be for the entire file.
+    ///
+    /// `offset` must be headers offset, which can be obtained from `ImageDosHeader::nt_headers_offset`.
+    /// It is updated to point after the optional header, which is where the section headers are located.
+    ///
+    /// Also checks that the `signature` and `magic` fields in the headers are valid.
+    fn parse<'data, R: ReadRef<'data>>(
+        data: R,
+        offset: &mut u64,
+    ) -> read::Result<(&'data Self, DataDirectories<'data>)> {
+        // Note that this does not include the data directories in the optional header.
+        let nt_headers = data
+            .read::<Self>(offset)
+            .read_error("Invalid PE headers offset or size")?;
+        if nt_headers.signature() != pe::IMAGE_NT_SIGNATURE {
+            return Err(Error("Invalid PE magic"));
+        }
+        if !nt_headers.is_valid_optional_magic() {
+            return Err(Error("Invalid PE optional header magic"));
+        }
+
+        // Read the rest of the optional header, and then read the data directories from that.
+        let optional_data_size =
+            u64::from(nt_headers.file_header().size_of_optional_header.get(LE))
+                .checked_sub(mem::size_of::<Self::ImageOptionalHeader>() as u64)
+                .read_error("PE optional header size is too small")?;
+        let optional_data = data
+            .read_bytes(offset, optional_data_size)
+            .read_error("Invalid PE optional header size")?;
+        let data_directories = DataDirectories::parse(
+            optional_data,
+            nt_headers.optional_header().number_of_rva_and_sizes(),
+        )?;
+
+        Ok((nt_headers, data_directories))
+    }
+
+    /// Read the section table.
+    ///
+    /// `data` must be for the entire file.
+    /// `offset` must be after the optional file header.
+    #[inline]
+    fn sections<'data, R: ReadRef<'data>>(
+        &self,
+        data: R,
+        offset: u64,
+    ) -> read::Result<SectionTable<'data>> {
+        SectionTable::parse(self.file_header(), data, offset)
+    }
+
+    /// Read the COFF symbol table and string table.
+    ///
+    /// `data` must be the entire file data.
+    #[inline]
+    fn symbols<'data, R: ReadRef<'data>>(&self, data: R) -> read::Result<SymbolTable<'data, R>> {
+        SymbolTable::parse(self.file_header(), data)
+    }
+}
+
+/// A trait for generic access to `ImageOptionalHeader32` and `ImageOptionalHeader64`.
+#[allow(missing_docs)]
+pub trait ImageOptionalHeader: Debug + Pod {
+    // Standard fields.
+    fn magic(&self) -> u16;
+    fn major_linker_version(&self) -> u8;
+    fn minor_linker_version(&self) -> u8;
+    fn size_of_code(&self) -> u32;
+    fn size_of_initialized_data(&self) -> u32;
+    fn size_of_uninitialized_data(&self) -> u32;
+    fn address_of_entry_point(&self) -> u32;
+    fn base_of_code(&self) -> u32;
+    fn base_of_data(&self) -> Option<u32>;
+
+    // NT additional fields.
+    fn image_base(&self) -> u64;
+    fn section_alignment(&self) -> u32;
+    fn file_alignment(&self) -> u32;
+    fn major_operating_system_version(&self) -> u16;
+    fn minor_operating_system_version(&self) -> u16;
+    fn major_image_version(&self) -> u16;
+    fn minor_image_version(&self) -> u16;
+    fn major_subsystem_version(&self) -> u16;
+    fn minor_subsystem_version(&self) -> u16;
+    fn win32_version_value(&self) -> u32;
+    fn size_of_image(&self) -> u32;
+    fn size_of_headers(&self) -> u32;
+    fn check_sum(&self) -> u32;
+    fn subsystem(&self) -> u16;
+    fn dll_characteristics(&self) -> u16;
+    fn size_of_stack_reserve(&self) -> u64;
+    fn size_of_stack_commit(&self) -> u64;
+    fn size_of_heap_reserve(&self) -> u64;
+    fn size_of_heap_commit(&self) -> u64;
+    fn loader_flags(&self) -> u32;
+    fn number_of_rva_and_sizes(&self) -> u32;
+}
+
+impl ImageNtHeaders for pe::ImageNtHeaders32 {
+    type ImageOptionalHeader = pe::ImageOptionalHeader32;
+    type ImageThunkData = pe::ImageThunkData32;
+
+    #[inline]
+    fn is_type_64(&self) -> bool {
+        false
+    }
+
+    #[inline]
+    fn is_valid_optional_magic(&self) -> bool {
+        self.optional_header.magic.get(LE) == pe::IMAGE_NT_OPTIONAL_HDR32_MAGIC
+    }
+
+    #[inline]
+    fn signature(&self) -> u32 {
+        self.signature.get(LE)
+    }
+
+    #[inline]
+    fn file_header(&self) -> &pe::ImageFileHeader {
+        &self.file_header
+    }
+
+    #[inline]
+    fn optional_header(&self) -> &Self::ImageOptionalHeader {
+        &self.optional_header
+    }
+}
+
+impl ImageOptionalHeader for pe::ImageOptionalHeader32 {
+    #[inline]
+    fn magic(&self) -> u16 {
+        self.magic.get(LE)
+    }
+
+    #[inline]
+    fn major_linker_version(&self) -> u8 {
+        self.major_linker_version
+    }
+
+    #[inline]
+    fn minor_linker_version(&self) -> u8 {
+        self.minor_linker_version
+    }
+
+    #[inline]
+    fn size_of_code(&self) -> u32 {
+        self.size_of_code.get(LE)
+    }
+
+    #[inline]
+    fn size_of_initialized_data(&self) -> u32 {
+        self.size_of_initialized_data.get(LE)
+    }
+
+    #[inline]
+    fn size_of_uninitialized_data(&self) -> u32 {
+        self.size_of_uninitialized_data.get(LE)
+    }
+
+    #[inline]
+    fn address_of_entry_point(&self) -> u32 {
+        self.address_of_entry_point.get(LE)
+    }
+
+    #[inline]
+    fn base_of_code(&self) -> u32 {
+        self.base_of_code.get(LE)
+    }
+
+    #[inline]
+    fn base_of_data(&self) -> Option<u32> {
+        Some(self.base_of_data.get(LE))
+    }
+
+    #[inline]
+    fn image_base(&self) -> u64 {
+        self.image_base.get(LE).into()
+    }
+
+    #[inline]
+    fn section_alignment(&self) -> u32 {
+        self.section_alignment.get(LE)
+    }
+
+    #[inline]
+    fn file_alignment(&self) -> u32 {
+        self.file_alignment.get(LE)
+    }
+
+    #[inline]
+    fn major_operating_system_version(&self) -> u16 {
+        self.major_operating_system_version.get(LE)
+    }
+
+    #[inline]
+    fn minor_operating_system_version(&self) -> u16 {
+        self.minor_operating_system_version.get(LE)
+    }
+
+    #[inline]
+    fn major_image_version(&self) -> u16 {
+        self.major_image_version.get(LE)
+    }
+
+    #[inline]
+    fn minor_image_version(&self) -> u16 {
+        self.minor_image_version.get(LE)
+    }
+
+    #[inline]
+    fn major_subsystem_version(&self) -> u16 {
+        self.major_subsystem_version.get(LE)
+    }
+
+    #[inline]
+    fn minor_subsystem_version(&self) -> u16 {
+        self.minor_subsystem_version.get(LE)
+    }
+
+    #[inline]
+    fn win32_version_value(&self) -> u32 {
+        self.win32_version_value.get(LE)
+    }
+
+    #[inline]
+    fn size_of_image(&self) -> u32 {
+        self.size_of_image.get(LE)
+    }
+
+    #[inline]
+    fn size_of_headers(&self) -> u32 {
+        self.size_of_headers.get(LE)
+    }
+
+    #[inline]
+    fn check_sum(&self) -> u32 {
+        self.check_sum.get(LE)
+    }
+
+    #[inline]
+    fn subsystem(&self) -> u16 {
+        self.subsystem.get(LE)
+    }
+
+    #[inline]
+    fn dll_characteristics(&self) -> u16 {
+        self.dll_characteristics.get(LE)
+    }
+
+    #[inline]
+    fn size_of_stack_reserve(&self) -> u64 {
+        self.size_of_stack_reserve.get(LE).into()
+    }
+
+    #[inline]
+    fn size_of_stack_commit(&self) -> u64 {
+        self.size_of_stack_commit.get(LE).into()
+    }
+
+    #[inline]
+    fn size_of_heap_reserve(&self) -> u64 {
+        self.size_of_heap_reserve.get(LE).into()
+    }
+
+    #[inline]
+    fn size_of_heap_commit(&self) -> u64 {
+        self.size_of_heap_commit.get(LE).into()
+    }
+
+    #[inline]
+    fn loader_flags(&self) -> u32 {
+        self.loader_flags.get(LE)
+    }
+
+    #[inline]
+    fn number_of_rva_and_sizes(&self) -> u32 {
+        self.number_of_rva_and_sizes.get(LE)
+    }
+}
+
+impl ImageNtHeaders for pe::ImageNtHeaders64 {
+    type ImageOptionalHeader = pe::ImageOptionalHeader64;
+    type ImageThunkData = pe::ImageThunkData64;
+
+    #[inline]
+    fn is_type_64(&self) -> bool {
+        true
+    }
+
+    #[inline]
+    fn is_valid_optional_magic(&self) -> bool {
+        self.optional_header.magic.get(LE) == pe::IMAGE_NT_OPTIONAL_HDR64_MAGIC
+    }
+
+    #[inline]
+    fn signature(&self) -> u32 {
+        self.signature.get(LE)
+    }
+
+    #[inline]
+    fn file_header(&self) -> &pe::ImageFileHeader {
+        &self.file_header
+    }
+
+    #[inline]
+    fn optional_header(&self) -> &Self::ImageOptionalHeader {
+        &self.optional_header
+    }
+}
+
+impl ImageOptionalHeader for pe::ImageOptionalHeader64 {
+    #[inline]
+    fn magic(&self) -> u16 {
+        self.magic.get(LE)
+    }
+
+    #[inline]
+    fn major_linker_version(&self) -> u8 {
+        self.major_linker_version
+    }
+
+    #[inline]
+    fn minor_linker_version(&self) -> u8 {
+        self.minor_linker_version
+    }
+
+    #[inline]
+    fn size_of_code(&self) -> u32 {
+        self.size_of_code.get(LE)
+    }
+
+    #[inline]
+    fn size_of_initialized_data(&self) -> u32 {
+        self.size_of_initialized_data.get(LE)
+    }
+
+    #[inline]
+    fn size_of_uninitialized_data(&self) -> u32 {
+        self.size_of_uninitialized_data.get(LE)
+    }
+
+    #[inline]
+    fn address_of_entry_point(&self) -> u32 {
+        self.address_of_entry_point.get(LE)
+    }
+
+    #[inline]
+    fn base_of_code(&self) -> u32 {
+        self.base_of_code.get(LE)
+    }
+
+    #[inline]
+    fn base_of_data(&self) -> Option<u32> {
+        None
+    }
+
+    #[inline]
+    fn image_base(&self) -> u64 {
+        self.image_base.get(LE)
+    }
+
+    #[inline]
+    fn section_alignment(&self) -> u32 {
+        self.section_alignment.get(LE)
+    }
+
+    #[inline]
+    fn file_alignment(&self) -> u32 {
+        self.file_alignment.get(LE)
+    }
+
+    #[inline]
+    fn major_operating_system_version(&self) -> u16 {
+        self.major_operating_system_version.get(LE)
+    }
+
+    #[inline]
+    fn minor_operating_system_version(&self) -> u16 {
+        self.minor_operating_system_version.get(LE)
+    }
+
+    #[inline]
+    fn major_image_version(&self) -> u16 {
+        self.major_image_version.get(LE)
+    }
+
+    #[inline]
+    fn minor_image_version(&self) -> u16 {
+        self.minor_image_version.get(LE)
+    }
+
+    #[inline]
+    fn major_subsystem_version(&self) -> u16 {
+        self.major_subsystem_version.get(LE)
+    }
+
+    #[inline]
+    fn minor_subsystem_version(&self) -> u16 {
+        self.minor_subsystem_version.get(LE)
+    }
+
+    #[inline]
+    fn win32_version_value(&self) -> u32 {
+        self.win32_version_value.get(LE)
+    }
+
+    #[inline]
+    fn size_of_image(&self) -> u32 {
+        self.size_of_image.get(LE)
+    }
+
+    #[inline]
+    fn size_of_headers(&self) -> u32 {
+        self.size_of_headers.get(LE)
+    }
+
+    #[inline]
+    fn check_sum(&self) -> u32 {
+        self.check_sum.get(LE)
+    }
+
+    #[inline]
+    fn subsystem(&self) -> u16 {
+        self.subsystem.get(LE)
+    }
+
+    #[inline]
+    fn dll_characteristics(&self) -> u16 {
+        self.dll_characteristics.get(LE)
+    }
+
+    #[inline]
+    fn size_of_stack_reserve(&self) -> u64 {
+        self.size_of_stack_reserve.get(LE)
+    }
+
+    #[inline]
+    fn size_of_stack_commit(&self) -> u64 {
+        self.size_of_stack_commit.get(LE)
+    }
+
+    #[inline]
+    fn size_of_heap_reserve(&self) -> u64 {
+        self.size_of_heap_reserve.get(LE)
+    }
+
+    #[inline]
+    fn size_of_heap_commit(&self) -> u64 {
+        self.size_of_heap_commit.get(LE)
+    }
+
+    #[inline]
+    fn loader_flags(&self) -> u32 {
+        self.loader_flags.get(LE)
+    }
+
+    #[inline]
+    fn number_of_rva_and_sizes(&self) -> u32 {
+        self.number_of_rva_and_sizes.get(LE)
+    }
+}
diff --git a/third_party/rust/object/src/read/pe/import.rs b/third_party/rust/object/src/read/pe/import.rs
new file mode 100644
index 0000000000..a5535dc367
--- /dev/null
+++ b/third_party/rust/object/src/read/pe/import.rs
@@ -0,0 +1,332 @@
+use core::fmt::Debug;
+use core::mem;
+
+use crate::read::{Bytes, ReadError, Result};
+use crate::{pe, LittleEndian as LE, Pod, U16Bytes};
+
+use super::ImageNtHeaders;
+
+/// Information for parsing a PE import table.
+#[derive(Debug, Clone)]
+pub struct ImportTable<'data> {
+    section_data: Bytes<'data>,
+    section_address: u32,
+    import_address: u32,
+}
+
+impl<'data> ImportTable<'data> {
+    /// Create a new import table parser.
+    ///
+    /// The import descriptors start at `import_address`.
+    /// The size declared in the `IMAGE_DIRECTORY_ENTRY_IMPORT` data directory is
+    /// ignored by the Windows loader, and so descriptors will be parsed until a null entry.
+    ///
+    /// `section_data` should be from the section containing `import_address`, and
+    /// `section_address` should be the address of that section. Pointers within the
+    /// descriptors and thunks may point to anywhere within the section data.
+    pub fn new(section_data: &'data [u8], section_address: u32, import_address: u32) -> Self {
+        ImportTable {
+            section_data: Bytes(section_data),
+            section_address,
+            import_address,
+        }
+    }
+
+    /// Return an iterator for the import descriptors.
+    pub fn descriptors(&self) -> Result<ImportDescriptorIterator<'data>> {
+        let offset = self.import_address.wrapping_sub(self.section_address);
+        let mut data = self.section_data;
+        data.skip(offset as usize)
+            .read_error("Invalid PE import descriptor address")?;
+        Ok(ImportDescriptorIterator { data })
+    }
+
+    /// Return a library name given its address.
+    ///
+    /// This address may be from [`pe::ImageImportDescriptor::name`].
+    pub fn name(&self, address: u32) -> Result<&'data [u8]> {
+        self.section_data
+            .read_string_at(address.wrapping_sub(self.section_address) as usize)
+            .read_error("Invalid PE import descriptor name")
+    }
+
+    /// Return a list of thunks given its address.
+    ///
+    /// This address may be from [`pe::ImageImportDescriptor::original_first_thunk`]
+    /// or [`pe::ImageImportDescriptor::first_thunk`].
+    pub fn thunks(&self, address: u32) -> Result<ImportThunkList<'data>> {
+        let offset = address.wrapping_sub(self.section_address);
+        let mut data = self.section_data;
+        data.skip(offset as usize)
+            .read_error("Invalid PE import thunk table address")?;
+        Ok(ImportThunkList { data })
+    }
+
+    /// Parse a thunk.
+    pub fn import<Pe: ImageNtHeaders>(&self, thunk: Pe::ImageThunkData) -> Result<Import<'data>> {
+        if thunk.is_ordinal() {
+            Ok(Import::Ordinal(thunk.ordinal()))
+        } else {
+            let (hint, name) = self.hint_name(thunk.address())?;
+            Ok(Import::Name(hint, name))
+        }
+    }
+
+    /// Return the hint and name at the given address.
+    ///
+    /// This address may be from [`pe::ImageThunkData32`] or [`pe::ImageThunkData64`].
+    ///
+    /// The hint is an index into the export name pointer table in the target library.
+    pub fn hint_name(&self, address: u32) -> Result<(u16, &'data [u8])> {
+        let offset = address.wrapping_sub(self.section_address);
+        let mut data = self.section_data;
+        data.skip(offset as usize)
+            .read_error("Invalid PE import thunk address")?;
+        let hint = data
+            .read::<U16Bytes<LE>>()
+            .read_error("Missing PE import thunk hint")?
+            .get(LE);
+        let name = data
+            .read_string()
+            .read_error("Missing PE import thunk name")?;
+        Ok((hint, name))
+    }
+}
+
+/// A fallible iterator for the descriptors in the import data directory.
+#[derive(Debug, Clone)]
+pub struct ImportDescriptorIterator<'data> {
+    data: Bytes<'data>,
+}
+
+impl<'data> ImportDescriptorIterator<'data> {
+    /// Return the next descriptor.
+    ///
+    /// Returns `Ok(None)` when a null descriptor is found.
+    pub fn next(&mut self) -> Result<Option<&'data pe::ImageImportDescriptor>> {
+        let import_desc = self
+            .data
+            .read::<pe::ImageImportDescriptor>()
+            .read_error("Missing PE null import descriptor")?;
+        if import_desc.is_null() {
+            Ok(None)
+        } else {
+            Ok(Some(import_desc))
+        }
+    }
+}
+
+/// A list of import thunks.
+///
+/// These may be in the import lookup table, or the import address table.
+#[derive(Debug, Clone)]
+pub struct ImportThunkList<'data> {
+    data: Bytes<'data>,
+}
+
+impl<'data> ImportThunkList<'data> {
+    /// Get the thunk at the given index.
+    pub fn get<Pe: ImageNtHeaders>(&self, index: usize) -> Result<Pe::ImageThunkData> {
+        let thunk = self
+            .data
+            .read_at(index * mem::size_of::<Pe::ImageThunkData>())
+            .read_error("Invalid PE import thunk index")?;
+        Ok(*thunk)
+    }
+
+    /// Return the first thunk in the list, and update `self` to point after it.
+    ///
+    /// Returns `Ok(None)` when a null thunk is found.
+    pub fn next<Pe: ImageNtHeaders>(&mut self) -> Result<Option<Pe::ImageThunkData>> {
+        let thunk = self
+            .data
+            .read::<Pe::ImageThunkData>()
+            .read_error("Missing PE null import thunk")?;
+        if thunk.address() == 0 {
+            Ok(None)
+        } else {
+            Ok(Some(*thunk))
+        }
+    }
+}
+
+/// A parsed import thunk.
+#[derive(Debug, Clone, Copy)]
+pub enum Import<'data> {
+    /// Import by ordinal.
+    Ordinal(u16),
+    /// Import by name.
+    ///
+    /// Includes a hint for the index into the export name pointer table in the target library.
+    Name(u16, &'data [u8]),
+}
+
+/// A trait for generic access to [`pe::ImageThunkData32`] and [`pe::ImageThunkData64`].
+#[allow(missing_docs)]
+pub trait ImageThunkData: Debug + Pod {
+    /// Return the raw thunk value.
+    fn raw(self) -> u64;
+
+    /// Returns true if the ordinal flag is set.
+    fn is_ordinal(self) -> bool;
+
+    /// Return the ordinal portion of the thunk.
+    ///
+    /// Does not check the ordinal flag.
+    fn ordinal(self) -> u16;
+
+    /// Return the RVA portion of the thunk.
+    ///
+    /// Does not check the ordinal flag.
+    fn address(self) -> u32;
+}
+
+impl ImageThunkData for pe::ImageThunkData64 {
+    fn raw(self) -> u64 {
+        self.0.get(LE)
+    }
+
+    fn is_ordinal(self) -> bool {
+        self.0.get(LE) & pe::IMAGE_ORDINAL_FLAG64 != 0
+    }
+
+    fn ordinal(self) -> u16 {
+        self.0.get(LE) as u16
+    }
+
+    fn address(self) -> u32 {
+        self.0.get(LE) as u32 & 0x7fff_ffff
+    }
+}
+
+impl ImageThunkData for pe::ImageThunkData32 {
+    fn raw(self) -> u64 {
+        self.0.get(LE).into()
+    }
+
+    fn is_ordinal(self) -> bool {
+        self.0.get(LE) & pe::IMAGE_ORDINAL_FLAG32 != 0
+    }
+
+    fn ordinal(self) -> u16 {
+        self.0.get(LE) as u16
+    }
+
+    fn address(self) -> u32 {
+        self.0.get(LE) & 0x7fff_ffff
+    }
+}
+
+/// Information for parsing a PE delay-load import table.
+#[derive(Debug, Clone)]
+pub struct DelayLoadImportTable<'data> {
+    section_data: Bytes<'data>,
+    section_address: u32,
+    import_address: u32,
+}
+
+impl<'data> DelayLoadImportTable<'data> {
+    /// Create a new delay load import table parser.
+    ///
+    /// The import descriptors start at `import_address`.
+    /// This table works in the same way the import table does: descriptors will be
+    /// parsed until a null entry.
+    ///
+    /// `section_data` should be from the section containing `import_address`, and
+    /// `section_address` should be the address of that section. Pointers within the
+    /// descriptors and thunks may point to anywhere within the section data.
+    pub fn new(section_data: &'data [u8], section_address: u32, import_address: u32) -> Self {
+        DelayLoadImportTable {
+            section_data: Bytes(section_data),
+            section_address,
+            import_address,
+        }
+    }
+
+    /// Return an iterator for the import descriptors.
+    pub fn descriptors(&self) -> Result<DelayLoadDescriptorIterator<'data>> {
+        let offset = self.import_address.wrapping_sub(self.section_address);
+        let mut data = self.section_data;
+        data.skip(offset as usize)
+            .read_error("Invalid PE delay-load import descriptor address")?;
+        Ok(DelayLoadDescriptorIterator { data })
+    }
+
+    /// Return a library name given its address.
+    ///
+    /// This address may be from [`pe::ImageDelayloadDescriptor::dll_name_rva`].
+    pub fn name(&self, address: u32) -> Result<&'data [u8]> {
+        self.section_data
+            .read_string_at(address.wrapping_sub(self.section_address) as usize)
+            .read_error("Invalid PE import descriptor name")
+    }
+
+    /// Return a list of thunks given its address.
+    ///
+    /// This address may be from the INT, i.e. from
+    /// [`pe::ImageDelayloadDescriptor::import_name_table_rva`].
+    ///
+    /// Please note that others RVA values from [`pe::ImageDelayloadDescriptor`] are used
+    /// by the delay loader at runtime to store values, and thus do not point inside the same
+    /// section as the INT. Calling this function on those addresses will fail.
+    pub fn thunks(&self, address: u32) -> Result<ImportThunkList<'data>> {
+        let offset = address.wrapping_sub(self.section_address);
+        let mut data = self.section_data;
+        data.skip(offset as usize)
+            .read_error("Invalid PE delay load import thunk table address")?;
+        Ok(ImportThunkList { data })
+    }
+
+    /// Parse a thunk.
+    pub fn import<Pe: ImageNtHeaders>(&self, thunk: Pe::ImageThunkData) -> Result<Import<'data>> {
+        if thunk.is_ordinal() {
+            Ok(Import::Ordinal(thunk.ordinal()))
+        } else {
+            let (hint, name) = self.hint_name(thunk.address())?;
+            Ok(Import::Name(hint, name))
+        }
+    }
+
+    /// Return the hint and name at the given address.
+    ///
+    /// This address may be from [`pe::ImageThunkData32`] or [`pe::ImageThunkData64`].
+    ///
+    /// The hint is an index into the export name pointer table in the target library.
+    pub fn hint_name(&self, address: u32) -> Result<(u16, &'data [u8])> {
+        let offset = address.wrapping_sub(self.section_address);
+        let mut data = self.section_data;
+        data.skip(offset as usize)
+            .read_error("Invalid PE delay load import thunk address")?;
+        let hint = data
+            .read::<U16Bytes<LE>>()
+            .read_error("Missing PE delay load import thunk hint")?
+            .get(LE);
+        let name = data
+            .read_string()
+            .read_error("Missing PE delay load import thunk name")?;
+        Ok((hint, name))
+    }
+}
+
+/// A fallible iterator for the descriptors in the delay-load data directory.
+#[derive(Debug, Clone)]
+pub struct DelayLoadDescriptorIterator<'data> {
+    data: Bytes<'data>,
+}
+
+impl<'data> DelayLoadDescriptorIterator<'data> {
+    /// Return the next descriptor.
+    ///
+    /// Returns `Ok(None)` when a null descriptor is found.
+    pub fn next(&mut self) -> Result<Option<&'data pe::ImageDelayloadDescriptor>> {
+        let import_desc = self
+            .data
+            .read::<pe::ImageDelayloadDescriptor>()
+            .read_error("Missing PE null delay-load import descriptor")?;
+        if import_desc.is_null() {
+            Ok(None)
+        } else {
+            Ok(Some(import_desc))
+        }
+    }
+}
diff --git a/third_party/rust/object/src/read/pe/mod.rs b/third_party/rust/object/src/read/pe/mod.rs
new file mode 100644
index 0000000000..2b7cc5d7a0
--- /dev/null
+++ b/third_party/rust/object/src/read/pe/mod.rs
@@ -0,0 +1,34 @@
+//! Support for reading PE files.
+//!
+//! Defines traits to abstract over the difference between PE32/PE32+,
+//! and implements read functionality in terms of these traits.
+//!
+//! This module reuses some of the COFF functionality.
+//!
+//! Also provides `PeFile` and related types which implement the `Object` trait.
+
+mod file;
+pub use file::*;
+
+mod section;
+pub use section::*;
+
+mod data_directory;
+pub use data_directory::*;
+
+mod export;
+pub use export::*;
+
+mod import;
+pub use import::*;
+
+mod relocation;
+pub use relocation::*;
+
+mod resource;
+pub use resource::*;
+
+mod rich;
+pub use rich::*;
+
+pub use super::coff::{SectionTable, SymbolTable};
diff --git a/third_party/rust/object/src/read/pe/relocation.rs b/third_party/rust/object/src/read/pe/relocation.rs
new file mode 100644
index 0000000000..06215bd1a7
--- /dev/null
+++ b/third_party/rust/object/src/read/pe/relocation.rs
@@ -0,0 +1,90 @@
+use core::slice;
+
+use crate::endian::{LittleEndian as LE, U16};
+use crate::pe;
+use crate::read::{Bytes, Error, ReadError, Result};
+
+/// An iterator over the relocation blocks in the `.reloc` section of a PE file.
+#[derive(Debug, Default, Clone, Copy)]
+pub struct RelocationBlockIterator<'data> {
+    data: Bytes<'data>,
+}
+
+impl<'data> RelocationBlockIterator<'data> {
+    /// Construct a new iterator from the data of the `.reloc` section.
+    pub fn new(data: &'data [u8]) -> Self {
+        RelocationBlockIterator { data: Bytes(data) }
+    }
+
+    /// Read the next relocation page.
+    pub fn next(&mut self) -> Result<Option<RelocationIterator<'data>>> {
+        if self.data.is_empty() {
+            return Ok(None);
+        }
+        let header = self
+            .data
+            .read::<pe::ImageBaseRelocation>()
+            .read_error("Invalid PE reloc section size")?;
+        let virtual_address = header.virtual_address.get(LE);
+        let size = header.size_of_block.get(LE);
+        if size <= 8 || size & 3 != 0 {
+            return Err(Error("Invalid PE reloc block size"));
+        }
+        let count = (size - 8) / 2;
+        let relocs = self
+            .data
+            .read_slice::<U16<LE>>(count as usize)
+            .read_error("Invalid PE reloc block size")?
+            .iter();
+        Ok(Some(RelocationIterator {
+            virtual_address,
+            size,
+            relocs,
+        }))
+    }
+}
+
+/// An iterator of the relocations in a block in the `.reloc` section of a PE file.
+#[derive(Debug, Clone)]
+pub struct RelocationIterator<'data> {
+    virtual_address: u32,
+    size: u32,
+    relocs: slice::Iter<'data, U16<LE>>,
+}
+
+impl<'data> RelocationIterator<'data> {
+    /// Return the virtual address of the page that this block of relocations applies to.
+    pub fn virtual_address(&self) -> u32 {
+        self.virtual_address
+    }
+
+    /// Return the size in bytes of this block of relocations.
+    pub fn size(&self) -> u32 {
+        self.size
+    }
+}
+
+impl<'data> Iterator for RelocationIterator<'data> {
+    type Item = Relocation;
+
+    fn next(&mut self) -> Option<Relocation> {
+        loop {
+            let reloc = self.relocs.next()?.get(LE);
+            if reloc != 0 {
+                return Some(Relocation {
+                    virtual_address: self.virtual_address.wrapping_add((reloc & 0xfff) as u32),
+                    typ: reloc >> 12,
+                });
+            }
+        }
+    }
+}
+
+/// A relocation in the `.reloc` section of a PE file.
+#[derive(Debug, Default, Clone, Copy)]
+pub struct Relocation {
+    /// The virtual address of the relocation.
+    pub virtual_address: u32,
+    /// One of the `pe::IMAGE_REL_BASED_*` constants.
+    pub typ: u16,
+}
diff --git a/third_party/rust/object/src/read/pe/resource.rs b/third_party/rust/object/src/read/pe/resource.rs
new file mode 100644
index 0000000000..e667f0d98b
--- /dev/null
+++ b/third_party/rust/object/src/read/pe/resource.rs
@@ -0,0 +1,207 @@
+use alloc::string::String;
+use core::char;
+
+use crate::read::{ReadError, ReadRef, Result};
+use crate::{pe, LittleEndian as LE, U16Bytes};
+
+/// The `.rsrc` section of a PE file.
+#[derive(Debug, Clone, Copy)]
+pub struct ResourceDirectory<'data> {
+    data: &'data [u8],
+}
+
+impl<'data> ResourceDirectory<'data> {
+    /// Construct from the data of the `.rsrc` section.
+    pub fn new(data: &'data [u8]) -> Self {
+        ResourceDirectory { data }
+    }
+
+    /// Parses the root resource directory.
+    pub fn root(&self) -> Result<ResourceDirectoryTable<'data>> {
+        ResourceDirectoryTable::parse(self.data, 0)
+    }
+}
+
+/// A table of resource entries.
+#[derive(Debug, Clone)]
+pub struct ResourceDirectoryTable<'data> {
+    /// The table header.
+    pub header: &'data pe::ImageResourceDirectory,
+    /// The table entries.
+    pub entries: &'data [pe::ImageResourceDirectoryEntry],
+}
+
+impl<'data> ResourceDirectoryTable<'data> {
+    fn parse(data: &'data [u8], offset: u32) -> Result<Self> {
+        let mut offset = u64::from(offset);
+        let header = data
+            .read::<pe::ImageResourceDirectory>(&mut offset)
+            .read_error("Invalid resource table header")?;
+        let entries_count = header.number_of_id_entries.get(LE) as usize
+            + header.number_of_named_entries.get(LE) as usize;
+        let entries = data
+            .read_slice::<pe::ImageResourceDirectoryEntry>(&mut offset, entries_count)
+            .read_error("Invalid resource table entries")?;
+        Ok(Self { header, entries })
+    }
+}
+
+impl pe::ImageResourceDirectoryEntry {
+    /// Returns true if the entry has a name, rather than an ID.
+    pub fn has_name(&self) -> bool {
+        self.name_or_id.get(LE) & pe::IMAGE_RESOURCE_NAME_IS_STRING != 0
+    }
+
+    /// Returns the section offset of the name.
+    ///
+    /// Valid if `has_name()` returns true.
+    fn name(&self) -> ResourceName {
+        let offset = self.name_or_id.get(LE) & !pe::IMAGE_RESOURCE_NAME_IS_STRING;
+        ResourceName { offset }
+    }
+
+    /// Returns the ID.
+    ///
+    /// Valid if `has_string_name()` returns false.
+    fn id(&self) -> u16 {
+        (self.name_or_id.get(LE) & 0x0000_FFFF) as u16
+    }
+
+    /// Returns the entry name
+    pub fn name_or_id(&self) -> ResourceNameOrId {
+        if self.has_name() {
+            ResourceNameOrId::Name(self.name())
+        } else {
+            ResourceNameOrId::Id(self.id())
+        }
+    }
+
+    /// Returns true if the entry is a subtable.
+    pub fn is_table(&self) -> bool {
+        self.offset_to_data_or_directory.get(LE) & pe::IMAGE_RESOURCE_DATA_IS_DIRECTORY != 0
+    }
+
+    /// Returns the section offset of the associated table or data.
+    pub fn data_offset(&self) -> u32 {
+        self.offset_to_data_or_directory.get(LE) & !pe::IMAGE_RESOURCE_DATA_IS_DIRECTORY
+    }
+
+    /// Returns the data associated to this directory entry.
+    pub fn data<'data>(
+        &self,
+        section: ResourceDirectory<'data>,
+    ) -> Result<ResourceDirectoryEntryData<'data>> {
+        if self.is_table() {
+            ResourceDirectoryTable::parse(section.data, self.data_offset())
+                .map(ResourceDirectoryEntryData::Table)
+        } else {
+            section
+                .data
+                .read_at::<pe::ImageResourceDataEntry>(self.data_offset().into())
+                .read_error("Invalid resource entry")
+                .map(ResourceDirectoryEntryData::Data)
+        }
+    }
+}
+
+/// Data associated with a resource directory entry.
+#[derive(Debug, Clone)]
+pub enum ResourceDirectoryEntryData<'data> {
+    /// A subtable entry.
+    Table(ResourceDirectoryTable<'data>),
+    /// A resource data entry.
+    Data(&'data pe::ImageResourceDataEntry),
+}
+
+impl<'data> ResourceDirectoryEntryData<'data> {
+    /// Converts to an option of table.
+    ///
+    /// Helper for iterator filtering.
+    pub fn table(self) -> Option<ResourceDirectoryTable<'data>> {
+        match self {
+            Self::Table(dir) => Some(dir),
+            _ => None,
+        }
+    }
+
+    /// Converts to an option of data entry.
+    ///
+    /// Helper for iterator filtering.
+    pub fn data(self) -> Option<&'data pe::ImageResourceDataEntry> {
+        match self {
+            Self::Data(rsc) => Some(rsc),
+            _ => None,
+        }
+    }
+}
+
+/// A resource name.
+#[derive(Debug, Clone, Copy)]
+pub struct ResourceName {
+    offset: u32,
+}
+
+impl ResourceName {
+    /// Converts to a `String`.
+    pub fn to_string_lossy(&self, directory: ResourceDirectory) -> Result<String> {
+        let d = self.data(directory)?.iter().map(|c| c.get(LE));
+
+        Ok(char::decode_utf16(d)
+            .map(|r| r.unwrap_or(char::REPLACEMENT_CHARACTER))
+            .collect::<String>())
+    }
+
+    /// Returns the string unicode buffer.
+    pub fn data<'data>(
+        &self,
+        directory: ResourceDirectory<'data>,
+    ) -> Result<&'data [U16Bytes<LE>]> {
+        let mut offset = u64::from(self.offset);
+        let len = directory
+            .data
+            .read::<U16Bytes<LE>>(&mut offset)
+            .read_error("Invalid resource name offset")?;
+        directory
+            .data
+            .read_slice::<U16Bytes<LE>>(&mut offset, len.get(LE).into())
+            .read_error("Invalid resource name length")
+    }
+
+    /// Returns the string buffer as raw bytes.
+    pub fn raw_data<'data>(&self, directory: ResourceDirectory<'data>) -> Result<&'data [u8]> {
+        self.data(directory).map(crate::pod::bytes_of_slice)
+    }
+}
+
+/// A resource name or ID.
+///
+/// Can be either a string or a numeric ID.
+#[derive(Debug)]
+pub enum ResourceNameOrId {
+    /// A resource name.
+    Name(ResourceName),
+    /// A resource ID.
+    Id(u16),
+}
+
+impl ResourceNameOrId {
+    /// Converts to an option of name.
+    ///
+    /// Helper for iterator filtering.
+    pub fn name(self) -> Option<ResourceName> {
+        match self {
+            Self::Name(name) => Some(name),
+            _ => None,
+        }
+    }
+
+    /// Converts to an option of ID.
+    ///
+    /// Helper for iterator filtering.
+    pub fn id(self) -> Option<u16> {
+        match self {
+            Self::Id(id) => Some(id),
+            _ => None,
+        }
+    }
+}
diff --git a/third_party/rust/object/src/read/pe/rich.rs b/third_party/rust/object/src/read/pe/rich.rs
new file mode 100644
index 0000000000..687dfc9950
--- /dev/null
+++ b/third_party/rust/object/src/read/pe/rich.rs
@@ -0,0 +1,91 @@
+//! PE rich header handling
+
+use core::mem;
+
+use crate::pod::bytes_of_slice;
+use crate::read::Bytes;
+use crate::{pe, LittleEndian as LE, ReadRef, U32};
+
+/// Parsed information about a Rich Header.
+#[derive(Debug, Clone, Copy)]
+pub struct RichHeaderInfo<'data> {
+    /// The offset at which the rich header starts.
+    pub offset: usize,
+    /// The length (in bytes) of the rich header.
+    ///
+    /// This includes the payload, but also the 16-byte start sequence and the
+    /// 8-byte final "Rich" and XOR key.
+    pub length: usize,
+    /// The XOR key used to mask the rich header.
+    ///
+    /// Unless the file has been tampered with, it should be equal to a checksum
+    /// of the file header.
+    pub xor_key: u32,
+    masked_entries: &'data [pe::MaskedRichHeaderEntry],
+}
+
+/// A PE rich header entry after it has been unmasked.
+///
+/// See [`pe::MaskedRichHeaderEntry`].
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct RichHeaderEntry {
+    /// ID of the component.
+    pub comp_id: u32,
+    /// Number of times this component has been used when building this PE.
+    pub count: u32,
+}
+
+impl<'data> RichHeaderInfo<'data> {
+    /// Try to locate a rich header and its entries in the current PE file.
+    pub fn parse<R: ReadRef<'data>>(data: R, nt_header_offset: u64) -> Option<Self> {
+        // Locate the rich header, if any.
+        // It ends with the "Rich" string and an XOR key, before the NT header.
+        let data = data.read_bytes_at(0, nt_header_offset).map(Bytes).ok()?;
+        let end_marker_offset = memmem(data.0, b"Rich", 4)?;
+        let xor_key = *data.read_at::<U32<LE>>(end_marker_offset + 4).ok()?;
+
+        // It starts at the masked "DanS" string and 3 masked zeroes.
+        let masked_start_marker = U32::new(LE, 0x536e_6144 ^ xor_key.get(LE));
+        let start_header = [masked_start_marker, xor_key, xor_key, xor_key];
+        let start_sequence = bytes_of_slice(&start_header);
+        let start_marker_offset = memmem(&data.0[..end_marker_offset], start_sequence, 4)?;
+
+        // Extract the items between the markers.
+        let items_offset = start_marker_offset + start_sequence.len();
+        let items_len = end_marker_offset - items_offset;
+        let item_count = items_len / mem::size_of::<pe::MaskedRichHeaderEntry>();
+        let items = data.read_slice_at(items_offset, item_count).ok()?;
+        Some(RichHeaderInfo {
+            offset: start_marker_offset,
+            // Includes "Rich" marker and the XOR key.
+            length: end_marker_offset - start_marker_offset + 8,
+            xor_key: xor_key.get(LE),
+            masked_entries: items,
+        })
+    }
+
+    /// Returns an iterator over the unmasked entries.
+    pub fn unmasked_entries(&self) -> impl Iterator<Item = RichHeaderEntry> + 'data {
+        let xor_key = self.xor_key;
+        self.masked_entries
+            .iter()
+            .map(move |entry| RichHeaderEntry {
+                comp_id: entry.masked_comp_id.get(LE) ^ xor_key,
+                count: entry.masked_count.get(LE) ^ xor_key,
+            })
+    }
+}
+
+/// Find the offset of the first occurence of needle in the data.
+///
+/// The offset must have the given alignment.
+fn memmem(data: &[u8], needle: &[u8], align: usize) -> Option<usize> {
+    let mut offset = 0;
+    loop {
+        if data.get(offset..)?.get(..needle.len())? == needle {
+            return Some(offset);
+        }
+        offset += align;
+    }
+}
diff --git a/third_party/rust/object/src/read/pe/section.rs b/third_party/rust/object/src/read/pe/section.rs
new file mode 100644
index 0000000000..439d42dac1
--- /dev/null
+++ b/third_party/rust/object/src/read/pe/section.rs
@@ -0,0 +1,436 @@
+use core::marker::PhantomData;
+use core::{cmp, iter, slice, str};
+
+use crate::endian::LittleEndian as LE;
+use crate::pe;
+use crate::pe::ImageSectionHeader;
+use crate::read::{
+    self, CompressedData, CompressedFileRange, ObjectSection, ObjectSegment, ReadError, ReadRef,
+    Relocation, Result, SectionFlags, SectionIndex, SectionKind, SegmentFlags,
+};
+
+use super::{ImageNtHeaders, PeFile, SectionTable};
+
+/// An iterator over the loadable sections of a `PeFile32`.
+pub type PeSegmentIterator32<'data, 'file, R = &'data [u8]> =
+    PeSegmentIterator<'data, 'file, pe::ImageNtHeaders32, R>;
+/// An iterator over the loadable sections of a `PeFile64`.
+pub type PeSegmentIterator64<'data, 'file, R = &'data [u8]> =
+    PeSegmentIterator<'data, 'file, pe::ImageNtHeaders64, R>;
+
+/// An iterator over the loadable sections of a `PeFile`.
+#[derive(Debug)]
+pub struct PeSegmentIterator<'data, 'file, Pe, R = &'data [u8]>
+where
+    Pe: ImageNtHeaders,
+    R: ReadRef<'data>,
+{
+    pub(super) file: &'file PeFile<'data, Pe, R>,
+    pub(super) iter: slice::Iter<'data, pe::ImageSectionHeader>,
+}
+
+impl<'data, 'file, Pe, R> Iterator for PeSegmentIterator<'data, 'file, Pe, R>
+where
+    Pe: ImageNtHeaders,
+    R: ReadRef<'data>,
+{
+    type Item = PeSegment<'data, 'file, Pe, R>;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        self.iter.next().map(|section| PeSegment {
+            file: self.file,
+            section,
+        })
+    }
+}
+
+/// A loadable section of a `PeFile32`.
+pub type PeSegment32<'data, 'file, R = &'data [u8]> =
+    PeSegment<'data, 'file, pe::ImageNtHeaders32, R>;
+/// A loadable section of a `PeFile64`.
+pub type PeSegment64<'data, 'file, R = &'data [u8]> =
+    PeSegment<'data, 'file, pe::ImageNtHeaders64, R>;
+
+/// A loadable section of a `PeFile`.
+#[derive(Debug)]
+pub struct PeSegment<'data, 'file, Pe, R = &'data [u8]>
+where
+    Pe: ImageNtHeaders,
+    R: ReadRef<'data>,
+{
+    file: &'file PeFile<'data, Pe, R>,
+    section: &'data pe::ImageSectionHeader,
+}
+
+impl<'data, 'file, Pe, R> read::private::Sealed for PeSegment<'data, 'file, Pe, R>
+where
+    Pe: ImageNtHeaders,
+    R: ReadRef<'data>,
+{
+}
+
+impl<'data, 'file, Pe, R> ObjectSegment<'data> for PeSegment<'data, 'file, Pe, R>
+where
+    Pe: ImageNtHeaders,
+    R: ReadRef<'data>,
+{
+    #[inline]
+    fn address(&self) -> u64 {
+        u64::from(self.section.virtual_address.get(LE)).wrapping_add(self.file.common.image_base)
+    }
+
+    #[inline]
+    fn size(&self) -> u64 {
+        u64::from(self.section.virtual_size.get(LE))
+    }
+
+    #[inline]
+    fn align(&self) -> u64 {
+        self.file.section_alignment()
+    }
+
+    #[inline]
+    fn file_range(&self) -> (u64, u64) {
+        let (offset, size) = self.section.pe_file_range();
+        (u64::from(offset), u64::from(size))
+    }
+
+    fn data(&self) -> Result<&'data [u8]> {
+        self.section.pe_data(self.file.data)
+    }
+
+    fn data_range(&self, address: u64, size: u64) -> Result<Option<&'data [u8]>> {
+        Ok(read::util::data_range(
+            self.data()?,
+            self.address(),
+            address,
+            size,
+        ))
+    }
+
+    #[inline]
+    fn name_bytes(&self) -> Result<Option<&[u8]>> {
+        self.section
+            .name(self.file.common.symbols.strings())
+            .map(Some)
+    }
+
+    #[inline]
+    fn name(&self) -> Result<Option<&str>> {
+        let name = self.section.name(self.file.common.symbols.strings())?;
+        Ok(Some(
+            str::from_utf8(name)
+                .ok()
+                .read_error("Non UTF-8 PE section name")?,
+        ))
+    }
+
+    #[inline]
+    fn flags(&self) -> SegmentFlags {
+        let characteristics = self.section.characteristics.get(LE);
+        SegmentFlags::Coff { characteristics }
+    }
+}
+
+/// An iterator over the sections of a `PeFile32`.
+pub type PeSectionIterator32<'data, 'file, R = &'data [u8]> =
+    PeSectionIterator<'data, 'file, pe::ImageNtHeaders32, R>;
+/// An iterator over the sections of a `PeFile64`.
+pub type PeSectionIterator64<'data, 'file, R = &'data [u8]> =
+    PeSectionIterator<'data, 'file, pe::ImageNtHeaders64, R>;
+
+/// An iterator over the sections of a `PeFile`.
+#[derive(Debug)]
+pub struct PeSectionIterator<'data, 'file, Pe, R = &'data [u8]>
+where
+    'data: 'file,
+    Pe: ImageNtHeaders,
+    R: ReadRef<'data>,
+{
+    pub(super) file: &'file PeFile<'data, Pe, R>,
+    pub(super) iter: iter::Enumerate<slice::Iter<'data, pe::ImageSectionHeader>>,
+}
+
+impl<'data, 'file, Pe, R> Iterator for PeSectionIterator<'data, 'file, Pe, R>
+where
+    Pe: ImageNtHeaders,
+    R: ReadRef<'data>,
+{
+    type Item = PeSection<'data, 'file, Pe, R>;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        self.iter.next().map(|(index, section)| PeSection {
+            file: self.file,
+            index: SectionIndex(index + 1),
+            section,
+        })
+    }
+}
+
+/// A section of a `PeFile32`.
+pub type PeSection32<'data, 'file, R = &'data [u8]> =
+    PeSection<'data, 'file, pe::ImageNtHeaders32, R>;
+/// A section of a `PeFile64`.
+pub type PeSection64<'data, 'file, R = &'data [u8]> =
+    PeSection<'data, 'file, pe::ImageNtHeaders64, R>;
+
+/// A section of a `PeFile`.
+#[derive(Debug)]
+pub struct PeSection<'data, 'file, Pe, R = &'data [u8]>
+where
+    'data: 'file,
+    Pe: ImageNtHeaders,
+    R: ReadRef<'data>,
+{
+    pub(super) file: &'file PeFile<'data, Pe, R>,
+    pub(super) index: SectionIndex,
+    pub(super) section: &'data pe::ImageSectionHeader,
+}
+
+impl<'data, 'file, Pe, R> read::private::Sealed for PeSection<'data, 'file, Pe, R>
+where
+    Pe: ImageNtHeaders,
+    R: ReadRef<'data>,
+{
+}
+
+impl<'data, 'file, Pe, R> ObjectSection<'data> for PeSection<'data, 'file, Pe, R>
+where
+    Pe: ImageNtHeaders,
+    R: ReadRef<'data>,
+{
+    type RelocationIterator = PeRelocationIterator<'data, 'file, R>;
+
+    #[inline]
+    fn index(&self) -> SectionIndex {
+        self.index
+    }
+
+    #[inline]
+    fn address(&self) -> u64 {
+        u64::from(self.section.virtual_address.get(LE)).wrapping_add(self.file.common.image_base)
+    }
+
+    #[inline]
+    fn size(&self) -> u64 {
+        u64::from(self.section.virtual_size.get(LE))
+    }
+
+    #[inline]
+    fn align(&self) -> u64 {
+        self.file.section_alignment()
+    }
+
+    #[inline]
+    fn file_range(&self) -> Option<(u64, u64)> {
+        let (offset, size) = self.section.pe_file_range();
+        if size == 0 {
+            None
+        } else {
+            Some((u64::from(offset), u64::from(size)))
+        }
+    }
+
+    fn data(&self) -> Result<&'data [u8]> {
+        self.section.pe_data(self.file.data)
+    }
+
+    fn data_range(&self, address: u64, size: u64) -> Result<Option<&'data [u8]>> {
+        Ok(read::util::data_range(
+            self.data()?,
+            self.address(),
+            address,
+            size,
+        ))
+    }
+
+    #[inline]
+    fn compressed_file_range(&self) -> Result<CompressedFileRange> {
+        Ok(CompressedFileRange::none(self.file_range()))
+    }
+
+    #[inline]
+    fn compressed_data(&self) -> Result<CompressedData<'data>> {
+        self.data().map(CompressedData::none)
+    }
+
+    #[inline]
+    fn name_bytes(&self) -> Result<&[u8]> {
+        self.section.name(self.file.common.symbols.strings())
+    }
+
+    #[inline]
+    fn name(&self) -> Result<&str> {
+        let name = self.name_bytes()?;
+        str::from_utf8(name)
+            .ok()
+            .read_error("Non UTF-8 PE section name")
+    }
+
+    #[inline]
+    fn segment_name_bytes(&self) -> Result<Option<&[u8]>> {
+        Ok(None)
+    }
+
+    #[inline]
+    fn segment_name(&self) -> Result<Option<&str>> {
+        Ok(None)
+    }
+
+    #[inline]
+    fn kind(&self) -> SectionKind {
+        self.section.kind()
+    }
+
+    fn relocations(&self) -> PeRelocationIterator<'data, 'file, R> {
+        PeRelocationIterator(PhantomData)
+    }
+
+    fn flags(&self) -> SectionFlags {
+        SectionFlags::Coff {
+            characteristics: self.section.characteristics.get(LE),
+        }
+    }
+}
+
+impl<'data> SectionTable<'data> {
+    /// Return the file offset of the given virtual address, and the size up
+    /// to the end of the section containing it.
+    ///
+    /// Returns `None` if no section contains the address.
+    pub fn pe_file_range_at(&self, va: u32) -> Option<(u32, u32)> {
+        self.iter().find_map(|section| section.pe_file_range_at(va))
+    }
+
+    /// Return the data starting at the given virtual address, up to the end of the
+    /// section containing it.
+    ///
+    /// Ignores sections with invalid data.
+    ///
+    /// Returns `None` if no section contains the address.
+    pub fn pe_data_at<R: ReadRef<'data>>(&self, data: R, va: u32) -> Option<&'data [u8]> {
+        self.iter().find_map(|section| section.pe_data_at(data, va))
+    }
+
+    /// Return the data of the section that contains the given virtual address in a PE file.
+    ///
+    /// Also returns the virtual address of that section.
+    ///
+    /// Ignores sections with invalid data.
+    pub fn pe_data_containing<R: ReadRef<'data>>(
+        &self,
+        data: R,
+        va: u32,
+    ) -> Option<(&'data [u8], u32)> {
+        self.iter()
+            .find_map(|section| section.pe_data_containing(data, va))
+    }
+
+    /// Return the section that contains a given virtual address.
+    pub fn section_containing(&self, va: u32) -> Option<&'data ImageSectionHeader> {
+        self.iter().find(|section| section.contains_rva(va))
+    }
+}
+
+impl pe::ImageSectionHeader {
+    /// Return the offset and size of the section in a PE file.
+    ///
+    /// The size of the range will be the minimum of the file size and virtual size.
+    pub fn pe_file_range(&self) -> (u32, u32) {
+        // Pointer and size will be zero for uninitialized data; we don't need to validate this.
+        let offset = self.pointer_to_raw_data.get(LE);
+        let size = cmp::min(self.virtual_size.get(LE), self.size_of_raw_data.get(LE));
+        (offset, size)
+    }
+
+    /// Return the file offset of the given virtual address, and the remaining size up
+    /// to the end of the section.
+    ///
+    /// Returns `None` if the section does not contain the address.
+    pub fn pe_file_range_at(&self, va: u32) -> Option<(u32, u32)> {
+        let section_va = self.virtual_address.get(LE);
+        let offset = va.checked_sub(section_va)?;
+        let (section_offset, section_size) = self.pe_file_range();
+        // Address must be within section (and not at its end).
+        if offset < section_size {
+            Some((section_offset.checked_add(offset)?, section_size - offset))
+        } else {
+            None
+        }
+    }
+
+    /// Return the virtual address and size of the section.
+    pub fn pe_address_range(&self) -> (u32, u32) {
+        (self.virtual_address.get(LE), self.virtual_size.get(LE))
+    }
+
+    /// Return the section data in a PE file.
+    ///
+    /// The length of the data will be the minimum of the file size and virtual size.
+    pub fn pe_data<'data, R: ReadRef<'data>>(&self, data: R) -> Result<&'data [u8]> {
+        let (offset, size) = self.pe_file_range();
+        data.read_bytes_at(offset.into(), size.into())
+            .read_error("Invalid PE section offset or size")
+    }
+
+    /// Return the data starting at the given virtual address, up to the end of the
+    /// section.
+    ///
+    /// Ignores sections with invalid data.
+    ///
+    /// Returns `None` if the section does not contain the address.
+    pub fn pe_data_at<'data, R: ReadRef<'data>>(&self, data: R, va: u32) -> Option<&'data [u8]> {
+        let (offset, size) = self.pe_file_range_at(va)?;
+        data.read_bytes_at(offset.into(), size.into()).ok()
+    }
+
+    /// Tests whether a given RVA is part of this section
+    pub fn contains_rva(&self, va: u32) -> bool {
+        let section_va = self.virtual_address.get(LE);
+        match va.checked_sub(section_va) {
+            None => false,
+            Some(offset) => {
+                // Address must be within section (and not at its end).
+                offset < self.virtual_size.get(LE)
+            }
+        }
+    }
+
+    /// Return the section data if it contains the given virtual address.
+    ///
+    /// Also returns the virtual address of that section.
+    ///
+    /// Ignores sections with invalid data.
+    pub fn pe_data_containing<'data, R: ReadRef<'data>>(
+        &self,
+        data: R,
+        va: u32,
+    ) -> Option<(&'data [u8], u32)> {
+        let section_va = self.virtual_address.get(LE);
+        let offset = va.checked_sub(section_va)?;
+        let (section_offset, section_size) = self.pe_file_range();
+        // Address must be within section (and not at its end).
+        if offset < section_size {
+            let section_data = data
+                .read_bytes_at(section_offset.into(), section_size.into())
+                .ok()?;
+            Some((section_data, section_va))
+        } else {
+            None
+        }
+    }
+}
+
+/// An iterator over the relocations in an `PeSection`.
+#[derive(Debug)]
+pub struct PeRelocationIterator<'data, 'file, R = &'data [u8]>(
+    PhantomData<(&'data (), &'file (), R)>,
+);
+
+impl<'data, 'file, R> Iterator for PeRelocationIterator<'data, 'file, R> {
+    type Item = (u64, Relocation);
+
+    fn next(&mut self) -> Option<Self::Item> {
+        None
+    }
+}
diff --git a/third_party/rust/object/src/read/read_cache.rs b/third_party/rust/object/src/read/read_cache.rs
new file mode 100644
index 0000000000..19a98a44da
--- /dev/null
+++ b/third_party/rust/object/src/read/read_cache.rs
@@ -0,0 +1,185 @@
+use core::ops::Range;
+use std::boxed::Box;
+use std::cell::RefCell;
+use std::collections::hash_map::Entry;
+use std::collections::HashMap;
+use std::convert::TryInto;
+use std::io::{Read, Seek, SeekFrom};
+use std::mem;
+use std::vec::Vec;
+
+use crate::read::ReadRef;
+
+/// An implementation of `ReadRef` for data in a stream that implements
+/// `Read + Seek`.
+///
+/// Contains a cache of read-only blocks of data, allowing references to
+/// them to be returned. Entries in the cache are never removed.
+/// Entries are keyed on the offset and size of the read.
+/// Currently overlapping reads are considered separate reads.
+#[derive(Debug)]
+pub struct ReadCache<R: Read + Seek> {
+    cache: RefCell<ReadCacheInternal<R>>,
+}
+
+#[derive(Debug)]
+struct ReadCacheInternal<R: Read + Seek> {
+    read: R,
+    bufs: HashMap<(u64, u64), Box<[u8]>>,
+    strings: HashMap<(u64, u8), Box<[u8]>>,
+}
+
+impl<R: Read + Seek> ReadCache<R> {
+    /// Create an empty `ReadCache` for the given stream.
+    pub fn new(read: R) -> Self {
+        ReadCache {
+            cache: RefCell::new(ReadCacheInternal {
+                read,
+                bufs: HashMap::new(),
+                strings: HashMap::new(),
+            }),
+        }
+    }
+
+    /// Return an implementation of `ReadRef` that restricts reads
+    /// to the given range of the stream.
+    pub fn range(&self, offset: u64, size: u64) -> ReadCacheRange<'_, R> {
+        ReadCacheRange {
+            r: self,
+            offset,
+            size,
+        }
+    }
+
+    /// Free buffers used by the cache.
+    pub fn clear(&mut self) {
+        self.cache.borrow_mut().bufs.clear();
+    }
+
+    /// Unwrap this `ReadCache<R>`, returning the underlying reader.
+    pub fn into_inner(self) -> R {
+        self.cache.into_inner().read
+    }
+}
+
+impl<'a, R: Read + Seek> ReadRef<'a> for &'a ReadCache<R> {
+    fn len(self) -> Result<u64, ()> {
+        let cache = &mut *self.cache.borrow_mut();
+        cache.read.seek(SeekFrom::End(0)).map_err(|_| ())
+    }
+
+    fn read_bytes_at(self, offset: u64, size: u64) -> Result<&'a [u8], ()> {
+        if size == 0 {
+            return Ok(&[]);
+        }
+        let cache = &mut *self.cache.borrow_mut();
+        let buf = match cache.bufs.entry((offset, size)) {
+            Entry::Occupied(entry) => entry.into_mut(),
+            Entry::Vacant(entry) => {
+                let size = size.try_into().map_err(|_| ())?;
+                cache
+                    .read
+                    .seek(SeekFrom::Start(offset as u64))
+                    .map_err(|_| ())?;
+                let mut bytes = vec![0; size].into_boxed_slice();
+                cache.read.read_exact(&mut bytes).map_err(|_| ())?;
+                entry.insert(bytes)
+            }
+        };
+        // Extend the lifetime to that of self.
+        // This is OK because we never mutate or remove entries.
+        Ok(unsafe { mem::transmute::<&[u8], &[u8]>(buf) })
+    }
+
+    fn read_bytes_at_until(self, range: Range<u64>, delimiter: u8) -> Result<&'a [u8], ()> {
+        let cache = &mut *self.cache.borrow_mut();
+        let buf = match cache.strings.entry((range.start, delimiter)) {
+            Entry::Occupied(entry) => entry.into_mut(),
+            Entry::Vacant(entry) => {
+                cache
+                    .read
+                    .seek(SeekFrom::Start(range.start))
+                    .map_err(|_| ())?;
+
+                let max_check: usize = (range.end - range.start).try_into().map_err(|_| ())?;
+                // Strings should be relatively small.
+                // TODO: make this configurable?
+                let max_check = max_check.min(4096);
+
+                let mut bytes = Vec::new();
+                let mut checked = 0;
+                loop {
+                    bytes.resize((checked + 256).min(max_check), 0);
+                    let read = cache.read.read(&mut bytes[checked..]).map_err(|_| ())?;
+                    if read == 0 {
+                        return Err(());
+                    }
+                    if let Some(len) = memchr::memchr(delimiter, &bytes[checked..][..read]) {
+                        bytes.truncate(checked + len);
+                        break entry.insert(bytes.into_boxed_slice());
+                    }
+                    checked += read;
+                    if checked >= max_check {
+                        return Err(());
+                    }
+                }
+            }
+        };
+        // Extend the lifetime to that of self.
+        // This is OK because we never mutate or remove entries.
+        Ok(unsafe { mem::transmute::<&[u8], &[u8]>(buf) })
+    }
+}
+
+/// An implementation of `ReadRef` for a range of data in a stream that
+/// implements `Read + Seek`.
+///
+/// Shares an underlying `ReadCache` with a lifetime of `'a`.
+#[derive(Debug)]
+pub struct ReadCacheRange<'a, R: Read + Seek> {
+    r: &'a ReadCache<R>,
+    offset: u64,
+    size: u64,
+}
+
+impl<'a, R: Read + Seek> Clone for ReadCacheRange<'a, R> {
+    fn clone(&self) -> Self {
+        Self {
+            r: self.r,
+            offset: self.offset,
+            size: self.size,
+        }
+    }
+}
+
+impl<'a, R: Read + Seek> Copy for ReadCacheRange<'a, R> {}
+
+impl<'a, R: Read + Seek> ReadRef<'a> for ReadCacheRange<'a, R> {
+    fn len(self) -> Result<u64, ()> {
+        Ok(self.size)
+    }
+
+    fn read_bytes_at(self, offset: u64, size: u64) -> Result<&'a [u8], ()> {
+        if size == 0 {
+            return Ok(&[]);
+        }
+        let end = offset.checked_add(size).ok_or(())?;
+        if end > self.size {
+            return Err(());
+        }
+        let r_offset = self.offset.checked_add(offset).ok_or(())?;
+        self.r.read_bytes_at(r_offset, size)
+    }
+
+    fn read_bytes_at_until(self, range: Range<u64>, delimiter: u8) -> Result<&'a [u8], ()> {
+        let r_start = self.offset.checked_add(range.start).ok_or(())?;
+        let r_end = self.offset.checked_add(range.end).ok_or(())?;
+        let bytes = self.r.read_bytes_at_until(r_start..r_end, delimiter)?;
+        let size = bytes.len().try_into().map_err(|_| ())?;
+        let end = range.start.checked_add(size).ok_or(())?;
+        if end > self.size {
+            return Err(());
+        }
+        Ok(bytes)
+    }
+}
diff --git a/third_party/rust/object/src/read/read_ref.rs b/third_party/rust/object/src/read/read_ref.rs
new file mode 100644
index 0000000000..2f547a4e2c
--- /dev/null
+++ b/third_party/rust/object/src/read/read_ref.rs
@@ -0,0 +1,137 @@
+#![allow(clippy::len_without_is_empty)]
+
+use core::convert::TryInto;
+use core::ops::Range;
+use core::{mem, result};
+
+use crate::pod::{from_bytes, slice_from_bytes, Pod};
+
+type Result<T> = result::Result<T, ()>;
+
+/// A trait for reading references to `Pod` types from a block of data.
+///
+/// This allows parsers to handle both of these cases:
+/// - the block of data exists in memory, and it is desirable
+///   to use references to this block instead of copying it,
+/// - the block of data exists in storage, and it is desirable
+///   to read on demand to minimize I/O and memory usage.
+///
+/// The methods accept `self` by value because `Self` is expected to behave
+/// similar to a reference: it may be a reference with a lifetime of `'a`,
+/// or it may be a wrapper of a reference.
+///
+/// The `Clone` and `Copy` bounds are for convenience, and since `Self` is
+/// expected to be similar to a reference, these are easily satisfied.
+///
+/// Object file parsers typically use offsets to locate the structures
+/// in the block, and will most commonly use the `*_at` methods to
+/// read a structure at a known offset.
+///
+/// Occasionally file parsers will need to treat the block as a stream,
+/// and so convenience methods are provided that update an offset with
+/// the size that was read.
+//
+// An alternative would be for methods to accept `&mut self` and use a
+// `seek` method instead of the `offset` parameters, but this is less
+// convenient for implementers.
+pub trait ReadRef<'a>: Clone + Copy {
+    /// The total size of the block of data.
+    fn len(self) -> Result<u64>;
+
+    /// Get a reference to a `u8` slice at the given offset.
+    ///
+    /// Returns an error if offset or size are out of bounds.
+    fn read_bytes_at(self, offset: u64, size: u64) -> Result<&'a [u8]>;
+
+    /// Get a reference to a delimited `u8` slice which starts at range.start.
+    ///
+    /// Does not include the delimiter.
+    ///
+    /// Returns an error if the range is out of bounds or the delimiter is
+    /// not found in the range.
+    fn read_bytes_at_until(self, range: Range<u64>, delimiter: u8) -> Result<&'a [u8]>;
+
+    /// Get a reference to a `u8` slice at the given offset, and update the offset.
+    ///
+    /// Returns an error if offset or size are out of bounds.
+    fn read_bytes(self, offset: &mut u64, size: u64) -> Result<&'a [u8]> {
+        let bytes = self.read_bytes_at(*offset, size)?;
+        *offset = offset.wrapping_add(size);
+        Ok(bytes)
+    }
+
+    /// Get a reference to a `Pod` type at the given offset, and update the offset.
+    ///
+    /// Returns an error if offset or size are out of bounds.
+    ///
+    /// The default implementation uses `read_bytes`, and returns an error if
+    /// `read_bytes` does not return bytes with the correct alignment for `T`.
+    /// Implementors may want to provide their own implementation that ensures
+    /// the alignment can be satisified. Alternatively, only use this method with
+    /// types that do not need alignment (see the `unaligned` feature of this crate).
+    fn read<T: Pod>(self, offset: &mut u64) -> Result<&'a T> {
+        let size = mem::size_of::<T>().try_into().map_err(|_| ())?;
+        let bytes = self.read_bytes(offset, size)?;
+        let (t, _) = from_bytes(bytes)?;
+        Ok(t)
+    }
+
+    /// Get a reference to a `Pod` type at the given offset.
+    ///
+    /// Returns an error if offset or size are out of bounds.
+    ///
+    /// Also see the `read` method for information regarding alignment of `T`.
+    fn read_at<T: Pod>(self, mut offset: u64) -> Result<&'a T> {
+        self.read(&mut offset)
+    }
+
+    /// Get a reference to a slice of a `Pod` type at the given offset, and update the offset.
+    ///
+    /// Returns an error if offset or size are out of bounds.
+    ///
+    /// Also see the `read` method for information regarding alignment of `T`.
+    fn read_slice<T: Pod>(self, offset: &mut u64, count: usize) -> Result<&'a [T]> {
+        let size = count
+            .checked_mul(mem::size_of::<T>())
+            .ok_or(())?
+            .try_into()
+            .map_err(|_| ())?;
+        let bytes = self.read_bytes(offset, size)?;
+        let (t, _) = slice_from_bytes(bytes, count)?;
+        Ok(t)
+    }
+
+    /// Get a reference to a slice of a `Pod` type at the given offset.
+    ///
+    /// Returns an error if offset or size are out of bounds.
+    ///
+    /// Also see the `read` method for information regarding alignment of `T`.
+    fn read_slice_at<T: Pod>(self, mut offset: u64, count: usize) -> Result<&'a [T]> {
+        self.read_slice(&mut offset, count)
+    }
+}
+
+impl<'a> ReadRef<'a> for &'a [u8] {
+    fn len(self) -> Result<u64> {
+        self.len().try_into().map_err(|_| ())
+    }
+
+    fn read_bytes_at(self, offset: u64, size: u64) -> Result<&'a [u8]> {
+        let offset: usize = offset.try_into().map_err(|_| ())?;
+        let size: usize = size.try_into().map_err(|_| ())?;
+        self.get(offset..).ok_or(())?.get(..size).ok_or(())
+    }
+
+    fn read_bytes_at_until(self, range: Range<u64>, delimiter: u8) -> Result<&'a [u8]> {
+        let start: usize = range.start.try_into().map_err(|_| ())?;
+        let end: usize = range.end.try_into().map_err(|_| ())?;
+        let bytes = self.get(start..end).ok_or(())?;
+        match memchr::memchr(delimiter, bytes) {
+            Some(len) => {
+                // This will never fail.
+                bytes.get(..len).ok_or(())
+            }
+            None => Err(()),
+        }
+    }
+}
diff --git a/third_party/rust/object/src/read/traits.rs b/third_party/rust/object/src/read/traits.rs
new file mode 100644
index 0000000000..f1a473e0ad
--- /dev/null
+++ b/third_party/rust/object/src/read/traits.rs
@@ -0,0 +1,469 @@
+use alloc::borrow::Cow;
+use alloc::vec::Vec;
+
+use crate::read::{
+    self, Architecture, CodeView, ComdatKind, CompressedData, CompressedFileRange, Export,
+    FileFlags, Import, ObjectKind, ObjectMap, Relocation, Result, SectionFlags, SectionIndex,
+    SectionKind, SegmentFlags, SymbolFlags, SymbolIndex, SymbolKind, SymbolMap, SymbolMapName,
+    SymbolScope, SymbolSection,
+};
+use crate::Endianness;
+
+/// An object file.
+pub trait Object<'data: 'file, 'file>: read::private::Sealed {
+    /// A segment in the object file.
+    type Segment: ObjectSegment<'data>;
+
+    /// An iterator over the segments in the object file.
+    type SegmentIterator: Iterator<Item = Self::Segment>;
+
+    /// A section in the object file.
+    type Section: ObjectSection<'data>;
+
+    /// An iterator over the sections in the object file.
+    type SectionIterator: Iterator<Item = Self::Section>;
+
+    /// A COMDAT section group in the object file.
+    type Comdat: ObjectComdat<'data>;
+
+    /// An iterator over the COMDAT section groups in the object file.
+    type ComdatIterator: Iterator<Item = Self::Comdat>;
+
+    /// A symbol in the object file.
+    type Symbol: ObjectSymbol<'data>;
+
+    /// An iterator over symbols in the object file.
+    type SymbolIterator: Iterator<Item = Self::Symbol>;
+
+    /// A symbol table in the object file.
+    type SymbolTable: ObjectSymbolTable<
+        'data,
+        Symbol = Self::Symbol,
+        SymbolIterator = Self::SymbolIterator,
+    >;
+
+    /// An iterator over dynamic relocations in the file.
+    ///
+    /// The first field in the item tuple is the address
+    /// that the relocation applies to.
+    type DynamicRelocationIterator: Iterator<Item = (u64, Relocation)>;
+
+    /// Get the architecture type of the file.
+    fn architecture(&self) -> Architecture;
+
+    /// Get the endianness of the file.
+    #[inline]
+    fn endianness(&self) -> Endianness {
+        if self.is_little_endian() {
+            Endianness::Little
+        } else {
+            Endianness::Big
+        }
+    }
+
+    /// Return true if the file is little endian, false if it is big endian.
+    fn is_little_endian(&self) -> bool;
+
+    /// Return true if the file can contain 64-bit addresses.
+    fn is_64(&self) -> bool;
+
+    /// Return the kind of this object.
+    fn kind(&self) -> ObjectKind;
+
+    /// Get an iterator over the segments in the file.
+    fn segments(&'file self) -> Self::SegmentIterator;
+
+    /// Get the section named `section_name`, if such a section exists.
+    ///
+    /// If `section_name` starts with a '.' then it is treated as a system section name,
+    /// and is compared using the conventions specific to the object file format. This
+    /// includes:
+    /// - if ".debug_str_offsets" is requested for a Mach-O object file, then the actual
+    /// section name that is searched for is "__debug_str_offs".
+    /// - if ".debug_info" is requested for an ELF object file, then
+    /// ".zdebug_info" may be returned (and similarly for other debug sections).
+    ///
+    /// For some object files, multiple segments may contain sections with the same
+    /// name. In this case, the first matching section will be used.
+    ///
+    /// This method skips over sections with invalid names.
+    fn section_by_name(&'file self, section_name: &str) -> Option<Self::Section> {
+        self.section_by_name_bytes(section_name.as_bytes())
+    }
+
+    /// Like [`Self::section_by_name`], but allows names that are not UTF-8.
+    fn section_by_name_bytes(&'file self, section_name: &[u8]) -> Option<Self::Section>;
+
+    /// Get the section at the given index.
+    ///
+    /// The meaning of the index depends on the object file.
+    ///
+    /// For some object files, this requires iterating through all sections.
+    ///
+    /// Returns an error if the index is invalid.
+    fn section_by_index(&'file self, index: SectionIndex) -> Result<Self::Section>;
+
+    /// Get an iterator over the sections in the file.
+    fn sections(&'file self) -> Self::SectionIterator;
+
+    /// Get an iterator over the COMDAT section groups in the file.
+    fn comdats(&'file self) -> Self::ComdatIterator;
+
+    /// Get the symbol table, if any.
+    fn symbol_table(&'file self) -> Option<Self::SymbolTable>;
+
+    /// Get the debugging symbol at the given index.
+    ///
+    /// The meaning of the index depends on the object file.
+    ///
+    /// Returns an error if the index is invalid.
+    fn symbol_by_index(&'file self, index: SymbolIndex) -> Result<Self::Symbol>;
+
+    /// Get an iterator over the debugging symbols in the file.
+    ///
+    /// This may skip over symbols that are malformed or unsupported.
+    ///
+    /// For Mach-O files, this does not include STAB entries.
+    fn symbols(&'file self) -> Self::SymbolIterator;
+
+    /// Get the dynamic linking symbol table, if any.
+    ///
+    /// Only ELF has a separate dynamic linking symbol table.
+    fn dynamic_symbol_table(&'file self) -> Option<Self::SymbolTable>;
+
+    /// Get an iterator over the dynamic linking symbols in the file.
+    ///
+    /// This may skip over symbols that are malformed or unsupported.
+    ///
+    /// Only ELF has separate dynamic linking symbols.
+    /// Other file formats will return an empty iterator.
+    fn dynamic_symbols(&'file self) -> Self::SymbolIterator;
+
+    /// Get the dynamic relocations for this file.
+    ///
+    /// Symbol indices in these relocations refer to the dynamic symbol table.
+    ///
+    /// Only ELF has dynamic relocations.
+    fn dynamic_relocations(&'file self) -> Option<Self::DynamicRelocationIterator>;
+
+    /// Construct a map from addresses to symbol names.
+    ///
+    /// The map will only contain defined text and data symbols.
+    /// The dynamic symbol table will only be used if there are no debugging symbols.
+    fn symbol_map(&'file self) -> SymbolMap<SymbolMapName<'data>> {
+        let mut symbols = Vec::new();
+        if let Some(table) = self.symbol_table().or_else(|| self.dynamic_symbol_table()) {
+            for symbol in table.symbols() {
+                if !symbol.is_definition() {
+                    continue;
+                }
+                if let Ok(name) = symbol.name() {
+                    symbols.push(SymbolMapName::new(symbol.address(), name));
+                }
+            }
+        }
+        SymbolMap::new(symbols)
+    }
+
+    /// Construct a map from addresses to symbol names and object file names.
+    ///
+    /// This is derived from Mach-O STAB entries.
+    fn object_map(&'file self) -> ObjectMap<'data> {
+        ObjectMap::default()
+    }
+
+    /// Get the imported symbols.
+    fn imports(&self) -> Result<Vec<Import<'data>>>;
+
+    /// Get the exported symbols that expose both a name and an address.
+    ///
+    /// Some file formats may provide other kinds of symbols, that can be retrieved using
+    /// the lower-level API.
+    fn exports(&self) -> Result<Vec<Export<'data>>>;
+
+    /// Return true if the file contains debug information sections, false if not.
+    fn has_debug_symbols(&self) -> bool;
+
+    /// The UUID from a Mach-O `LC_UUID` load command.
+    #[inline]
+    fn mach_uuid(&self) -> Result<Option<[u8; 16]>> {
+        Ok(None)
+    }
+
+    /// The build ID from an ELF `NT_GNU_BUILD_ID` note.
+    #[inline]
+    fn build_id(&self) -> Result<Option<&'data [u8]>> {
+        Ok(None)
+    }
+
+    /// The filename and CRC from a `.gnu_debuglink` section.
+    #[inline]
+    fn gnu_debuglink(&self) -> Result<Option<(&'data [u8], u32)>> {
+        Ok(None)
+    }
+
+    /// The filename and build ID from a `.gnu_debugaltlink` section.
+    #[inline]
+    fn gnu_debugaltlink(&self) -> Result<Option<(&'data [u8], &'data [u8])>> {
+        Ok(None)
+    }
+
+    /// The filename and GUID from the PE CodeView section
+    #[inline]
+    fn pdb_info(&self) -> Result<Option<CodeView>> {
+        Ok(None)
+    }
+
+    /// Get the base address used for relative virtual addresses.
+    ///
+    /// Currently this is only non-zero for PE.
+    fn relative_address_base(&'file self) -> u64;
+
+    /// Get the virtual address of the entry point of the binary
+    fn entry(&'file self) -> u64;
+
+    /// File flags that are specific to each file format.
+    fn flags(&self) -> FileFlags;
+}
+
+/// A loadable segment defined in an object file.
+///
+/// For ELF, this is a program header with type `PT_LOAD`.
+/// For Mach-O, this is a load command with type `LC_SEGMENT` or `LC_SEGMENT_64`.
+pub trait ObjectSegment<'data>: read::private::Sealed {
+    /// Returns the virtual address of the segment.
+    fn address(&self) -> u64;
+
+    /// Returns the size of the segment in memory.
+    fn size(&self) -> u64;
+
+    /// Returns the alignment of the segment in memory.
+    fn align(&self) -> u64;
+
+    /// Returns the offset and size of the segment in the file.
+    fn file_range(&self) -> (u64, u64);
+
+    /// Returns a reference to the file contents of the segment.
+    ///
+    /// The length of this data may be different from the size of the
+    /// segment in memory.
+    fn data(&self) -> Result<&'data [u8]>;
+
+    /// Return the segment data in the given range.
+    ///
+    /// Returns `Ok(None)` if the segment does not contain the given range.
+    fn data_range(&self, address: u64, size: u64) -> Result<Option<&'data [u8]>>;
+
+    /// Returns the name of the segment.
+    fn name_bytes(&self) -> Result<Option<&[u8]>>;
+
+    /// Returns the name of the segment.
+    ///
+    /// Returns an error if the name is not UTF-8.
+    fn name(&self) -> Result<Option<&str>>;
+
+    /// Return the flags of segment.
+    fn flags(&self) -> SegmentFlags;
+}
+
+/// A section defined in an object file.
+pub trait ObjectSection<'data>: read::private::Sealed {
+    /// An iterator over the relocations for a section.
+    ///
+    /// The first field in the item tuple is the section offset
+    /// that the relocation applies to.
+    type RelocationIterator: Iterator<Item = (u64, Relocation)>;
+
+    /// Returns the section index.
+    fn index(&self) -> SectionIndex;
+
+    /// Returns the address of the section.
+    fn address(&self) -> u64;
+
+    /// Returns the size of the section in memory.
+    fn size(&self) -> u64;
+
+    /// Returns the alignment of the section in memory.
+    fn align(&self) -> u64;
+
+    /// Returns offset and size of on-disk segment (if any).
+    fn file_range(&self) -> Option<(u64, u64)>;
+
+    /// Returns the raw contents of the section.
+    ///
+    /// The length of this data may be different from the size of the
+    /// section in memory.
+    ///
+    /// This does not do any decompression.
+    fn data(&self) -> Result<&'data [u8]>;
+
+    /// Return the raw contents of the section data in the given range.
+    ///
+    /// This does not do any decompression.
+    ///
+    /// Returns `Ok(None)` if the section does not contain the given range.
+    fn data_range(&self, address: u64, size: u64) -> Result<Option<&'data [u8]>>;
+
+    /// Returns the potentially compressed file range of the section,
+    /// along with information about the compression.
+    fn compressed_file_range(&self) -> Result<CompressedFileRange>;
+
+    /// Returns the potentially compressed contents of the section,
+    /// along with information about the compression.
+    fn compressed_data(&self) -> Result<CompressedData<'data>>;
+
+    /// Returns the uncompressed contents of the section.
+    ///
+    /// The length of this data may be different from the size of the
+    /// section in memory.
+    ///
+    /// If no compression is detected, then returns the data unchanged.
+    /// Returns `Err` if decompression fails.
+    fn uncompressed_data(&self) -> Result<Cow<'data, [u8]>> {
+        self.compressed_data()?.decompress()
+    }
+
+    /// Returns the name of the section.
+    fn name_bytes(&self) -> Result<&[u8]>;
+
+    /// Returns the name of the section.
+    ///
+    /// Returns an error if the name is not UTF-8.
+    fn name(&self) -> Result<&str>;
+
+    /// Returns the name of the segment for this section.
+    fn segment_name_bytes(&self) -> Result<Option<&[u8]>>;
+
+    /// Returns the name of the segment for this section.
+    ///
+    /// Returns an error if the name is not UTF-8.
+    fn segment_name(&self) -> Result<Option<&str>>;
+
+    /// Return the kind of this section.
+    fn kind(&self) -> SectionKind;
+
+    /// Get the relocations for this section.
+    fn relocations(&self) -> Self::RelocationIterator;
+
+    /// Section flags that are specific to each file format.
+    fn flags(&self) -> SectionFlags;
+}
+
+/// A COMDAT section group defined in an object file.
+pub trait ObjectComdat<'data>: read::private::Sealed {
+    /// An iterator over the sections in the object file.
+    type SectionIterator: Iterator<Item = SectionIndex>;
+
+    /// Returns the COMDAT selection kind.
+    fn kind(&self) -> ComdatKind;
+
+    /// Returns the index of the symbol used for the name of COMDAT section group.
+    fn symbol(&self) -> SymbolIndex;
+
+    /// Returns the name of the COMDAT section group.
+    fn name_bytes(&self) -> Result<&[u8]>;
+
+    /// Returns the name of the COMDAT section group.
+    ///
+    /// Returns an error if the name is not UTF-8.
+    fn name(&self) -> Result<&str>;
+
+    /// Get the sections in this section group.
+    fn sections(&self) -> Self::SectionIterator;
+}
+
+/// A symbol table.
+pub trait ObjectSymbolTable<'data>: read::private::Sealed {
+    /// A symbol table entry.
+    type Symbol: ObjectSymbol<'data>;
+
+    /// An iterator over the symbols in a symbol table.
+    type SymbolIterator: Iterator<Item = Self::Symbol>;
+
+    /// Get an iterator over the symbols in the table.
+    ///
+    /// This may skip over symbols that are malformed or unsupported.
+    fn symbols(&self) -> Self::SymbolIterator;
+
+    /// Get the symbol at the given index.
+    ///
+    /// The meaning of the index depends on the object file.
+    ///
+    /// Returns an error if the index is invalid.
+    fn symbol_by_index(&self, index: SymbolIndex) -> Result<Self::Symbol>;
+}
+
+/// A symbol table entry.
+pub trait ObjectSymbol<'data>: read::private::Sealed {
+    /// The index of the symbol.
+    fn index(&self) -> SymbolIndex;
+
+    /// The name of the symbol.
+    fn name_bytes(&self) -> Result<&'data [u8]>;
+
+    /// The name of the symbol.
+    ///
+    /// Returns an error if the name is not UTF-8.
+    fn name(&self) -> Result<&'data str>;
+
+    /// The address of the symbol. May be zero if the address is unknown.
+    fn address(&self) -> u64;
+
+    /// The size of the symbol. May be zero if the size is unknown.
+    fn size(&self) -> u64;
+
+    /// Return the kind of this symbol.
+    fn kind(&self) -> SymbolKind;
+
+    /// Returns the section where the symbol is defined.
+    fn section(&self) -> SymbolSection;
+
+    /// Returns the section index for the section containing this symbol.
+    ///
+    /// May return `None` if the symbol is not defined in a section.
+    fn section_index(&self) -> Option<SectionIndex> {
+        self.section().index()
+    }
+
+    /// Return true if the symbol is undefined.
+    fn is_undefined(&self) -> bool;
+
+    /// Return true if the symbol is a definition of a function or data object
+    /// that has a known address.
+    fn is_definition(&self) -> bool;
+
+    /// Return true if the symbol is common data.
+    ///
+    /// Note: does not check for `SymbolSection::Section` with `SectionKind::Common`.
+    fn is_common(&self) -> bool;
+
+    /// Return true if the symbol is weak.
+    fn is_weak(&self) -> bool;
+
+    /// Returns the symbol scope.
+    fn scope(&self) -> SymbolScope;
+
+    /// Return true if the symbol visible outside of the compilation unit.
+    ///
+    /// This treats `SymbolScope::Unknown` as global.
+    fn is_global(&self) -> bool;
+
+    /// Return true if the symbol is only visible within the compilation unit.
+    fn is_local(&self) -> bool;
+
+    /// Symbol flags that are specific to each file format.
+    fn flags(&self) -> SymbolFlags<SectionIndex>;
+}
+
+/// An iterator for files that don't have dynamic relocations.
+#[derive(Debug)]
+pub struct NoDynamicRelocationIterator;
+
+impl Iterator for NoDynamicRelocationIterator {
+    type Item = (u64, Relocation);
+
+    #[inline]
+    fn next(&mut self) -> Option<Self::Item> {
+        None
+    }
+}
diff --git a/third_party/rust/object/src/read/util.rs b/third_party/rust/object/src/read/util.rs
new file mode 100644
index 0000000000..842bd6ca16
--- /dev/null
+++ b/third_party/rust/object/src/read/util.rs
@@ -0,0 +1,383 @@
+use alloc::string::String;
+use core::convert::TryInto;
+use core::fmt;
+use core::marker::PhantomData;
+
+use crate::pod::{from_bytes, slice_from_bytes, Pod};
+use crate::ReadRef;
+
+/// A newtype for byte slices.
+///
+/// It has these important features:
+/// - no methods that can panic, such as `Index`
+/// - convenience methods for `Pod` types
+/// - a useful `Debug` implementation
+#[derive(Default, Clone, Copy, PartialEq, Eq)]
+pub struct Bytes<'data>(pub &'data [u8]);
+
+impl<'data> fmt::Debug for Bytes<'data> {
+    fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
+        debug_list_bytes(self.0, fmt)
+    }
+}
+
+impl<'data> Bytes<'data> {
+    /// Return the length of the byte slice.
+    #[inline]
+    pub fn len(&self) -> usize {
+        self.0.len()
+    }
+
+    /// Return true if the byte slice is empty.
+    #[inline]
+    pub fn is_empty(&self) -> bool {
+        self.0.is_empty()
+    }
+
+    /// Skip over the given number of bytes at the start of the byte slice.
+    ///
+    /// Modifies the byte slice to start after the bytes.
+    ///
+    /// Returns an error if there are too few bytes.
+    #[inline]
+    pub fn skip(&mut self, offset: usize) -> Result<(), ()> {
+        match self.0.get(offset..) {
+            Some(tail) => {
+                self.0 = tail;
+                Ok(())
+            }
+            None => {
+                self.0 = &[];
+                Err(())
+            }
+        }
+    }
+
+    /// Return a reference to the given number of bytes at the start of the byte slice.
+    ///
+    /// Modifies the byte slice to start after the bytes.
+    ///
+    /// Returns an error if there are too few bytes.
+    #[inline]
+    pub fn read_bytes(&mut self, count: usize) -> Result<Bytes<'data>, ()> {
+        match (self.0.get(..count), self.0.get(count..)) {
+            (Some(head), Some(tail)) => {
+                self.0 = tail;
+                Ok(Bytes(head))
+            }
+            _ => {
+                self.0 = &[];
+                Err(())
+            }
+        }
+    }
+
+    /// Return a reference to the given number of bytes at the given offset of the byte slice.
+    ///
+    /// Returns an error if the offset is invalid or there are too few bytes.
+    #[inline]
+    pub fn read_bytes_at(mut self, offset: usize, count: usize) -> Result<Bytes<'data>, ()> {
+        self.skip(offset)?;
+        self.read_bytes(count)
+    }
+
+    /// Return a reference to a `Pod` struct at the start of the byte slice.
+    ///
+    /// Modifies the byte slice to start after the bytes.
+    ///
+    /// Returns an error if there are too few bytes or the slice is incorrectly aligned.
+    #[inline]
+    pub fn read<T: Pod>(&mut self) -> Result<&'data T, ()> {
+        match from_bytes(self.0) {
+            Ok((value, tail)) => {
+                self.0 = tail;
+                Ok(value)
+            }
+            Err(()) => {
+                self.0 = &[];
+                Err(())
+            }
+        }
+    }
+
+    /// Return a reference to a `Pod` struct at the given offset of the byte slice.
+    ///
+    /// Returns an error if there are too few bytes or the offset is incorrectly aligned.
+    #[inline]
+    pub fn read_at<T: Pod>(mut self, offset: usize) -> Result<&'data T, ()> {
+        self.skip(offset)?;
+        self.read()
+    }
+
+    /// Return a reference to a slice of `Pod` structs at the start of the byte slice.
+    ///
+    /// Modifies the byte slice to start after the bytes.
+    ///
+    /// Returns an error if there are too few bytes or the offset is incorrectly aligned.
+    #[inline]
+    pub fn read_slice<T: Pod>(&mut self, count: usize) -> Result<&'data [T], ()> {
+        match slice_from_bytes(self.0, count) {
+            Ok((value, tail)) => {
+                self.0 = tail;
+                Ok(value)
+            }
+            Err(()) => {
+                self.0 = &[];
+                Err(())
+            }
+        }
+    }
+
+    /// Return a reference to a slice of `Pod` structs at the given offset of the byte slice.
+    ///
+    /// Returns an error if there are too few bytes or the offset is incorrectly aligned.
+    #[inline]
+    pub fn read_slice_at<T: Pod>(mut self, offset: usize, count: usize) -> Result<&'data [T], ()> {
+        self.skip(offset)?;
+        self.read_slice(count)
+    }
+
+    /// Read a null terminated string.
+    ///
+    /// Does not assume any encoding.
+    /// Reads past the null byte, but doesn't return it.
+    #[inline]
+    pub fn read_string(&mut self) -> Result<&'data [u8], ()> {
+        match memchr::memchr(b'\0', self.0) {
+            Some(null) => {
+                // These will never fail.
+                let bytes = self.read_bytes(null)?;
+                self.skip(1)?;
+                Ok(bytes.0)
+            }
+            None => {
+                self.0 = &[];
+                Err(())
+            }
+        }
+    }
+
+    /// Read a null terminated string at an offset.
+    ///
+    /// Does not assume any encoding. Does not return the null byte.
+    #[inline]
+    pub fn read_string_at(mut self, offset: usize) -> Result<&'data [u8], ()> {
+        self.skip(offset)?;
+        self.read_string()
+    }
+}
+
+// Only for Debug impl of `Bytes`.
+fn debug_list_bytes(bytes: &[u8], fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
+    let mut list = fmt.debug_list();
+    list.entries(bytes.iter().take(8).copied().map(DebugByte));
+    if bytes.len() > 8 {
+        list.entry(&DebugLen(bytes.len()));
+    }
+    list.finish()
+}
+
+struct DebugByte(u8);
+
+impl fmt::Debug for DebugByte {
+    fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(fmt, "0x{:02x}", self.0)
+    }
+}
+
+struct DebugLen(usize);
+
+impl fmt::Debug for DebugLen {
+    fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(fmt, "...; {}", self.0)
+    }
+}
+
+/// A newtype for byte strings.
+///
+/// For byte slices that are strings of an unknown encoding.
+///
+/// Provides a `Debug` implementation that interprets the bytes as UTF-8.
+#[derive(Default, Clone, Copy, PartialEq, Eq)]
+pub(crate) struct ByteString<'data>(pub &'data [u8]);
+
+impl<'data> fmt::Debug for ByteString<'data> {
+    fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(fmt, "\"{}\"", String::from_utf8_lossy(self.0))
+    }
+}
+
+#[allow(dead_code)]
+#[inline]
+pub(crate) fn align(offset: usize, size: usize) -> usize {
+    (offset + (size - 1)) & !(size - 1)
+}
+
+#[allow(dead_code)]
+pub(crate) fn data_range(
+    data: &[u8],
+    data_address: u64,
+    range_address: u64,
+    size: u64,
+) -> Option<&[u8]> {
+    let offset = range_address.checked_sub(data_address)?;
+    data.get(offset.try_into().ok()?..)?
+        .get(..size.try_into().ok()?)
+}
+
+/// A table of zero-terminated strings.
+///
+/// This is used for most file formats.
+#[derive(Debug, Clone, Copy)]
+pub struct StringTable<'data, R = &'data [u8]>
+where
+    R: ReadRef<'data>,
+{
+    data: Option<R>,
+    start: u64,
+    end: u64,
+    marker: PhantomData<&'data ()>,
+}
+
+impl<'data, R: ReadRef<'data>> StringTable<'data, R> {
+    /// Interpret the given data as a string table.
+    pub fn new(data: R, start: u64, end: u64) -> Self {
+        StringTable {
+            data: Some(data),
+            start,
+            end,
+            marker: PhantomData,
+        }
+    }
+
+    /// Return the string at the given offset.
+    pub fn get(&self, offset: u32) -> Result<&'data [u8], ()> {
+        match self.data {
+            Some(data) => {
+                let r_start = self.start.checked_add(offset.into()).ok_or(())?;
+                data.read_bytes_at_until(r_start..self.end, 0)
+            }
+            None => Err(()),
+        }
+    }
+}
+
+impl<'data, R: ReadRef<'data>> Default for StringTable<'data, R> {
+    fn default() -> Self {
+        StringTable {
+            data: None,
+            start: 0,
+            end: 0,
+            marker: PhantomData,
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::pod::bytes_of;
+
+    #[test]
+    fn bytes() {
+        let x = u32::to_be(0x0123_4567);
+        let data = Bytes(bytes_of(&x));
+
+        let mut bytes = data;
+        assert_eq!(bytes.skip(0), Ok(()));
+        assert_eq!(bytes, data);
+
+        let mut bytes = data;
+        assert_eq!(bytes.skip(4), Ok(()));
+        assert_eq!(bytes, Bytes(&[]));
+
+        let mut bytes = data;
+        assert_eq!(bytes.skip(5), Err(()));
+        assert_eq!(bytes, Bytes(&[]));
+
+        let mut bytes = data;
+        assert_eq!(bytes.read_bytes(0), Ok(Bytes(&[])));
+        assert_eq!(bytes, data);
+
+        let mut bytes = data;
+        assert_eq!(bytes.read_bytes(4), Ok(data));
+        assert_eq!(bytes, Bytes(&[]));
+
+        let mut bytes = data;
+        assert_eq!(bytes.read_bytes(5), Err(()));
+        assert_eq!(bytes, Bytes(&[]));
+
+        assert_eq!(data.read_bytes_at(0, 0), Ok(Bytes(&[])));
+        assert_eq!(data.read_bytes_at(4, 0), Ok(Bytes(&[])));
+        assert_eq!(data.read_bytes_at(0, 4), Ok(data));
+        assert_eq!(data.read_bytes_at(1, 4), Err(()));
+
+        let mut bytes = data;
+        assert_eq!(bytes.read::<u16>(), Ok(&u16::to_be(0x0123)));
+        assert_eq!(bytes, Bytes(&[0x45, 0x67]));
+        assert_eq!(data.read_at::<u16>(2), Ok(&u16::to_be(0x4567)));
+        assert_eq!(data.read_at::<u16>(3), Err(()));
+        assert_eq!(data.read_at::<u16>(4), Err(()));
+
+        let mut bytes = data;
+        assert_eq!(bytes.read::<u32>(), Ok(&x));
+        assert_eq!(bytes, Bytes(&[]));
+
+        let mut bytes = data;
+        assert_eq!(bytes.read::<u64>(), Err(()));
+        assert_eq!(bytes, Bytes(&[]));
+
+        let mut bytes = data;
+        assert_eq!(bytes.read_slice::<u8>(0), Ok(&[][..]));
+        assert_eq!(bytes, data);
+
+        let mut bytes = data;
+        assert_eq!(bytes.read_slice::<u8>(4), Ok(data.0));
+        assert_eq!(bytes, Bytes(&[]));
+
+        let mut bytes = data;
+        assert_eq!(bytes.read_slice::<u8>(5), Err(()));
+        assert_eq!(bytes, Bytes(&[]));
+
+        assert_eq!(data.read_slice_at::<u8>(0, 0), Ok(&[][..]));
+        assert_eq!(data.read_slice_at::<u8>(4, 0), Ok(&[][..]));
+        assert_eq!(data.read_slice_at::<u8>(0, 4), Ok(data.0));
+        assert_eq!(data.read_slice_at::<u8>(1, 4), Err(()));
+
+        let data = Bytes(&[0x01, 0x02, 0x00, 0x04]);
+
+        let mut bytes = data;
+        assert_eq!(bytes.read_string(), Ok(&data.0[..2]));
+        assert_eq!(bytes.0, &data.0[3..]);
+
+        let mut bytes = data;
+        bytes.skip(3).unwrap();
+        assert_eq!(bytes.read_string(), Err(()));
+        assert_eq!(bytes.0, &[]);
+
+        assert_eq!(data.read_string_at(0), Ok(&data.0[..2]));
+        assert_eq!(data.read_string_at(1), Ok(&data.0[1..2]));
+        assert_eq!(data.read_string_at(2), Ok(&[][..]));
+        assert_eq!(data.read_string_at(3), Err(()));
+    }
+
+    #[test]
+    fn bytes_debug() {
+        assert_eq!(format!("{:?}", Bytes(&[])), "[]");
+        assert_eq!(format!("{:?}", Bytes(&[0x01])), "[0x01]");
+        assert_eq!(
+            format!(
+                "{:?}",
+                Bytes(&[0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08])
+            ),
+            "[0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08]"
+        );
+        assert_eq!(
+            format!(
+                "{:?}",
+                Bytes(&[0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09])
+            ),
+            "[0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, ...; 9]"
+        );
+    }
+}
diff --git a/third_party/rust/object/src/read/wasm.rs b/third_party/rust/object/src/read/wasm.rs
new file mode 100644
index 0000000000..0113f59714
--- /dev/null
+++ b/third_party/rust/object/src/read/wasm.rs
@@ -0,0 +1,908 @@
+//! Support for reading Wasm files.
+//!
+//! Provides `WasmFile` and related types which implement the `Object` trait.
+//!
+//! Currently implements the minimum required to access DWARF debugging information.
+use alloc::boxed::Box;
+use alloc::vec::Vec;
+use core::marker::PhantomData;
+use core::{slice, str};
+use wasmparser as wp;
+
+use crate::read::{
+    self, Architecture, ComdatKind, CompressedData, CompressedFileRange, Error, Export, FileFlags,
+    Import, NoDynamicRelocationIterator, Object, ObjectComdat, ObjectKind, ObjectSection,
+    ObjectSegment, ObjectSymbol, ObjectSymbolTable, ReadError, ReadRef, Relocation, Result,
+    SectionFlags, SectionIndex, SectionKind, SegmentFlags, SymbolFlags, SymbolIndex, SymbolKind,
+    SymbolScope, SymbolSection,
+};
+
+const SECTION_CUSTOM: usize = 0;
+const SECTION_TYPE: usize = 1;
+const SECTION_IMPORT: usize = 2;
+const SECTION_FUNCTION: usize = 3;
+const SECTION_TABLE: usize = 4;
+const SECTION_MEMORY: usize = 5;
+const SECTION_GLOBAL: usize = 6;
+const SECTION_EXPORT: usize = 7;
+const SECTION_START: usize = 8;
+const SECTION_ELEMENT: usize = 9;
+const SECTION_CODE: usize = 10;
+const SECTION_DATA: usize = 11;
+const SECTION_DATA_COUNT: usize = 12;
+// Update this constant when adding new section id:
+const MAX_SECTION_ID: usize = SECTION_DATA_COUNT;
+
+/// A WebAssembly object file.
+#[derive(Debug)]
+pub struct WasmFile<'data, R = &'data [u8]> {
+    // All sections, including custom sections.
+    sections: Vec<wp::Section<'data>>,
+    // Indices into `sections` of sections with a non-zero id.
+    id_sections: Box<[Option<usize>; MAX_SECTION_ID + 1]>,
+    // Whether the file has DWARF information.
+    has_debug_symbols: bool,
+    // Symbols collected from imports, exports, code and name sections.
+    symbols: Vec<WasmSymbolInternal<'data>>,
+    // Address of the function body for the entry point.
+    entry: u64,
+    marker: PhantomData<R>,
+}
+
+#[derive(Clone)]
+enum LocalFunctionKind {
+    Unknown,
+    Exported { symbol_ids: Vec<u32> },
+    Local { symbol_id: u32 },
+}
+
+impl<T> ReadError<T> for wasmparser::Result<T> {
+    fn read_error(self, error: &'static str) -> Result<T> {
+        self.map_err(|_| Error(error))
+    }
+}
+
+impl<'data, R: ReadRef<'data>> WasmFile<'data, R> {
+    /// Parse the raw wasm data.
+    pub fn parse(data: R) -> Result<Self> {
+        let len = data.len().read_error("Unknown Wasm file size")?;
+        let data = data.read_bytes_at(0, len).read_error("Wasm read failed")?;
+        let module = wp::ModuleReader::new(data).read_error("Invalid Wasm header")?;
+
+        let mut file = WasmFile {
+            sections: Vec::new(),
+            id_sections: Default::default(),
+            has_debug_symbols: false,
+            symbols: Vec::new(),
+            entry: 0,
+            marker: PhantomData,
+        };
+
+        let mut main_file_symbol = Some(WasmSymbolInternal {
+            name: "",
+            address: 0,
+            size: 0,
+            kind: SymbolKind::File,
+            section: SymbolSection::None,
+            scope: SymbolScope::Compilation,
+        });
+
+        let mut imported_funcs_count = 0;
+        let mut local_func_kinds = Vec::new();
+        let mut entry_func_id = None;
+
+        for section in module {
+            let section = section.read_error("Invalid Wasm section header")?;
+
+            match section.code {
+                wp::SectionCode::Import => {
+                    let mut last_module_name = None;
+
+                    for import in section
+                        .get_import_section_reader()
+                        .read_error("Couldn't read header of the import section")?
+                    {
+                        let import = import.read_error("Couldn't read an import item")?;
+                        let module_name = import.module;
+
+                        if last_module_name != Some(module_name) {
+                            file.symbols.push(WasmSymbolInternal {
+                                name: module_name,
+                                address: 0,
+                                size: 0,
+                                kind: SymbolKind::File,
+                                section: SymbolSection::None,
+                                scope: SymbolScope::Dynamic,
+                            });
+                            last_module_name = Some(module_name);
+                        }
+
+                        let kind = match import.ty {
+                            wp::ImportSectionEntryType::Function(_) => {
+                                imported_funcs_count += 1;
+                                SymbolKind::Text
+                            }
+                            wp::ImportSectionEntryType::Table(_)
+                            | wp::ImportSectionEntryType::Memory(_)
+                            | wp::ImportSectionEntryType::Global(_) => SymbolKind::Data,
+                        };
+
+                        file.symbols.push(WasmSymbolInternal {
+                            name: import.field,
+                            address: 0,
+                            size: 0,
+                            kind,
+                            section: SymbolSection::Undefined,
+                            scope: SymbolScope::Dynamic,
+                        });
+                    }
+                }
+                wp::SectionCode::Function => {
+                    local_func_kinds = vec![
+                        LocalFunctionKind::Unknown;
+                        section
+                            .get_function_section_reader()
+                            .read_error("Couldn't read header of the function section")?
+                            .get_count() as usize
+                    ];
+                }
+                wp::SectionCode::Export => {
+                    if let Some(main_file_symbol) = main_file_symbol.take() {
+                        file.symbols.push(main_file_symbol);
+                    }
+
+                    for export in section
+                        .get_export_section_reader()
+                        .read_error("Couldn't read header of the export section")?
+                    {
+                        let export = export.read_error("Couldn't read an export item")?;
+
+                        let (kind, section_idx) = match export.kind {
+                            wp::ExternalKind::Function => {
+                                if let Some(local_func_id) =
+                                    export.index.checked_sub(imported_funcs_count)
+                                {
+                                    let local_func_kind =
+                                        &mut local_func_kinds[local_func_id as usize];
+                                    if let LocalFunctionKind::Unknown = local_func_kind {
+                                        *local_func_kind = LocalFunctionKind::Exported {
+                                            symbol_ids: Vec::new(),
+                                        };
+                                    }
+                                    let symbol_ids = match local_func_kind {
+                                        LocalFunctionKind::Exported { symbol_ids } => symbol_ids,
+                                        _ => unreachable!(),
+                                    };
+                                    symbol_ids.push(file.symbols.len() as u32);
+                                }
+                                (SymbolKind::Text, SECTION_CODE)
+                            }
+                            wp::ExternalKind::Table
+                            | wp::ExternalKind::Memory
+                            | wp::ExternalKind::Global => (SymbolKind::Data, SECTION_DATA),
+                        };
+
+                        file.symbols.push(WasmSymbolInternal {
+                            name: export.field,
+                            address: 0,
+                            size: 0,
+                            kind,
+                            section: SymbolSection::Section(SectionIndex(section_idx)),
+                            scope: SymbolScope::Dynamic,
+                        });
+                    }
+                }
+                wp::SectionCode::Start => {
+                    entry_func_id = Some(
+                        section
+                            .get_start_section_content()
+                            .read_error("Couldn't read contents of the start section")?,
+                    );
+                }
+                wp::SectionCode::Code => {
+                    if let Some(main_file_symbol) = main_file_symbol.take() {
+                        file.symbols.push(main_file_symbol);
+                    }
+
+                    for (i, (body, local_func_kind)) in section
+                        .get_code_section_reader()
+                        .read_error("Couldn't read header of the code section")?
+                        .into_iter()
+                        .zip(&mut local_func_kinds)
+                        .enumerate()
+                    {
+                        let body = body.read_error("Couldn't read a function body")?;
+                        let range = body.range();
+
+                        let address = range.start as u64 - section.range().start as u64;
+                        let size = (range.end - range.start) as u64;
+
+                        if entry_func_id == Some(i as u32) {
+                            file.entry = address;
+                        }
+
+                        match local_func_kind {
+                            LocalFunctionKind::Unknown => {
+                                *local_func_kind = LocalFunctionKind::Local {
+                                    symbol_id: file.symbols.len() as u32,
+                                };
+                                file.symbols.push(WasmSymbolInternal {
+                                    name: "",
+                                    address,
+                                    size,
+                                    kind: SymbolKind::Text,
+                                    section: SymbolSection::Section(SectionIndex(SECTION_CODE)),
+                                    scope: SymbolScope::Compilation,
+                                });
+                            }
+                            LocalFunctionKind::Exported { symbol_ids } => {
+                                for symbol_id in core::mem::take(symbol_ids) {
+                                    let export_symbol = &mut file.symbols[symbol_id as usize];
+                                    export_symbol.address = address;
+                                    export_symbol.size = size;
+                                }
+                            }
+                            _ => unreachable!(),
+                        }
+                    }
+                }
+                wp::SectionCode::Custom {
+                    kind: wp::CustomSectionKind::Name,
+                    ..
+                } => {
+                    for name in section
+                        .get_name_section_reader()
+                        .read_error("Couldn't read header of the name section")?
+                    {
+                        // TODO: Right now, ill-formed name subsections
+                        // are silently ignored in order to maintain
+                        // compatibility with extended name sections, which
+                        // are not yet supported by the version of
+                        // `wasmparser` currently used.
+                        // A better fix would be to update `wasmparser` to
+                        // the newest version, but this requires
+                        // a major rewrite of this file.
+                        if let Ok(wp::Name::Function(name)) = name {
+                            let mut name_map = name.get_map().read_error(
+                                "Couldn't read header of the function name subsection",
+                            )?;
+                            for _ in 0..name_map.get_count() {
+                                let naming = name_map
+                                    .read()
+                                    .read_error("Couldn't read a function name")?;
+                                if let Some(local_index) =
+                                    naming.index.checked_sub(imported_funcs_count)
+                                {
+                                    if let LocalFunctionKind::Local { symbol_id } =
+                                        local_func_kinds[local_index as usize]
+                                    {
+                                        file.symbols[symbol_id as usize].name = naming.name;
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+                wp::SectionCode::Custom { name, .. } if name.starts_with(".debug_") => {
+                    file.has_debug_symbols = true;
+                }
+                _ => {}
+            }
+
+            let id = section_code_to_id(section.code);
+            file.id_sections[id] = Some(file.sections.len());
+
+            file.sections.push(section);
+        }
+
+        Ok(file)
+    }
+}
+
+impl<'data, R> read::private::Sealed for WasmFile<'data, R> {}
+
+impl<'data, 'file, R> Object<'data, 'file> for WasmFile<'data, R>
+where
+    'data: 'file,
+    R: 'file,
+{
+    type Segment = WasmSegment<'data, 'file, R>;
+    type SegmentIterator = WasmSegmentIterator<'data, 'file, R>;
+    type Section = WasmSection<'data, 'file, R>;
+    type SectionIterator = WasmSectionIterator<'data, 'file, R>;
+    type Comdat = WasmComdat<'data, 'file, R>;
+    type ComdatIterator = WasmComdatIterator<'data, 'file, R>;
+    type Symbol = WasmSymbol<'data, 'file>;
+    type SymbolIterator = WasmSymbolIterator<'data, 'file>;
+    type SymbolTable = WasmSymbolTable<'data, 'file>;
+    type DynamicRelocationIterator = NoDynamicRelocationIterator;
+
+    #[inline]
+    fn architecture(&self) -> Architecture {
+        Architecture::Wasm32
+    }
+
+    #[inline]
+    fn is_little_endian(&self) -> bool {
+        true
+    }
+
+    #[inline]
+    fn is_64(&self) -> bool {
+        false
+    }
+
+    fn kind(&self) -> ObjectKind {
+        // TODO: check for `linking` custom section
+        ObjectKind::Unknown
+    }
+
+    fn segments(&'file self) -> Self::SegmentIterator {
+        WasmSegmentIterator { file: self }
+    }
+
+    fn section_by_name_bytes(
+        &'file self,
+        section_name: &[u8],
+    ) -> Option<WasmSection<'data, 'file, R>> {
+        self.sections()
+            .find(|section| section.name_bytes() == Ok(section_name))
+    }
+
+    fn section_by_index(&'file self, index: SectionIndex) -> Result<WasmSection<'data, 'file, R>> {
+        // TODO: Missing sections should return an empty section.
+        let id_section = self
+            .id_sections
+            .get(index.0)
+            .and_then(|x| *x)
+            .read_error("Invalid Wasm section index")?;
+        let section = self.sections.get(id_section).unwrap();
+        Ok(WasmSection {
+            section,
+            marker: PhantomData,
+        })
+    }
+
+    fn sections(&'file self) -> Self::SectionIterator {
+        WasmSectionIterator {
+            sections: self.sections.iter(),
+            marker: PhantomData,
+        }
+    }
+
+    fn comdats(&'file self) -> Self::ComdatIterator {
+        WasmComdatIterator { file: self }
+    }
+
+    #[inline]
+    fn symbol_by_index(&'file self, index: SymbolIndex) -> Result<WasmSymbol<'data, 'file>> {
+        let symbol = self
+            .symbols
+            .get(index.0)
+            .read_error("Invalid Wasm symbol index")?;
+        Ok(WasmSymbol { index, symbol })
+    }
+
+    fn symbols(&'file self) -> Self::SymbolIterator {
+        WasmSymbolIterator {
+            symbols: self.symbols.iter().enumerate(),
+        }
+    }
+
+    fn symbol_table(&'file self) -> Option<WasmSymbolTable<'data, 'file>> {
+        Some(WasmSymbolTable {
+            symbols: &self.symbols,
+        })
+    }
+
+    fn dynamic_symbols(&'file self) -> Self::SymbolIterator {
+        WasmSymbolIterator {
+            symbols: [].iter().enumerate(),
+        }
+    }
+
+    #[inline]
+    fn dynamic_symbol_table(&'file self) -> Option<WasmSymbolTable<'data, 'file>> {
+        None
+    }
+
+    #[inline]
+    fn dynamic_relocations(&self) -> Option<NoDynamicRelocationIterator> {
+        None
+    }
+
+    fn imports(&self) -> Result<Vec<Import<'data>>> {
+        // TODO: return entries in the import section
+        Ok(Vec::new())
+    }
+
+    fn exports(&self) -> Result<Vec<Export<'data>>> {
+        // TODO: return entries in the export section
+        Ok(Vec::new())
+    }
+
+    fn has_debug_symbols(&self) -> bool {
+        self.has_debug_symbols
+    }
+
+    fn relative_address_base(&self) -> u64 {
+        0
+    }
+
+    #[inline]
+    fn entry(&'file self) -> u64 {
+        self.entry
+    }
+
+    #[inline]
+    fn flags(&self) -> FileFlags {
+        FileFlags::None
+    }
+}
+
+/// An iterator over the segments of a `WasmFile`.
+#[derive(Debug)]
+pub struct WasmSegmentIterator<'data, 'file, R = &'data [u8]> {
+    #[allow(unused)]
+    file: &'file WasmFile<'data, R>,
+}
+
+impl<'data, 'file, R> Iterator for WasmSegmentIterator<'data, 'file, R> {
+    type Item = WasmSegment<'data, 'file, R>;
+
+    #[inline]
+    fn next(&mut self) -> Option<Self::Item> {
+        None
+    }
+}
+
+/// A segment of a `WasmFile`.
+#[derive(Debug)]
+pub struct WasmSegment<'data, 'file, R = &'data [u8]> {
+    #[allow(unused)]
+    file: &'file WasmFile<'data, R>,
+}
+
+impl<'data, 'file, R> read::private::Sealed for WasmSegment<'data, 'file, R> {}
+
+impl<'data, 'file, R> ObjectSegment<'data> for WasmSegment<'data, 'file, R> {
+    #[inline]
+    fn address(&self) -> u64 {
+        unreachable!()
+    }
+
+    #[inline]
+    fn size(&self) -> u64 {
+        unreachable!()
+    }
+
+    #[inline]
+    fn align(&self) -> u64 {
+        unreachable!()
+    }
+
+    #[inline]
+    fn file_range(&self) -> (u64, u64) {
+        unreachable!()
+    }
+
+    fn data(&self) -> Result<&'data [u8]> {
+        unreachable!()
+    }
+
+    fn data_range(&self, _address: u64, _size: u64) -> Result<Option<&'data [u8]>> {
+        unreachable!()
+    }
+
+    #[inline]
+    fn name_bytes(&self) -> Result<Option<&[u8]>> {
+        unreachable!()
+    }
+
+    #[inline]
+    fn name(&self) -> Result<Option<&str>> {
+        unreachable!()
+    }
+
+    #[inline]
+    fn flags(&self) -> SegmentFlags {
+        unreachable!()
+    }
+}
+
+/// An iterator over the sections of a `WasmFile`.
+#[derive(Debug)]
+pub struct WasmSectionIterator<'data, 'file, R = &'data [u8]> {
+    sections: slice::Iter<'file, wp::Section<'data>>,
+    marker: PhantomData<R>,
+}
+
+impl<'data, 'file, R> Iterator for WasmSectionIterator<'data, 'file, R> {
+    type Item = WasmSection<'data, 'file, R>;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        let section = self.sections.next()?;
+        Some(WasmSection {
+            section,
+            marker: PhantomData,
+        })
+    }
+}
+
+/// A section of a `WasmFile`.
+#[derive(Debug)]
+pub struct WasmSection<'data, 'file, R = &'data [u8]> {
+    section: &'file wp::Section<'data>,
+    marker: PhantomData<R>,
+}
+
+impl<'data, 'file, R> read::private::Sealed for WasmSection<'data, 'file, R> {}
+
+impl<'data, 'file, R> ObjectSection<'data> for WasmSection<'data, 'file, R> {
+    type RelocationIterator = WasmRelocationIterator<'data, 'file, R>;
+
+    #[inline]
+    fn index(&self) -> SectionIndex {
+        // Note that we treat all custom sections as index 0.
+        // This is ok because they are never looked up by index.
+        SectionIndex(section_code_to_id(self.section.code))
+    }
+
+    #[inline]
+    fn address(&self) -> u64 {
+        0
+    }
+
+    #[inline]
+    fn size(&self) -> u64 {
+        let range = self.section.range();
+        (range.end - range.start) as u64
+    }
+
+    #[inline]
+    fn align(&self) -> u64 {
+        1
+    }
+
+    #[inline]
+    fn file_range(&self) -> Option<(u64, u64)> {
+        let range = self.section.range();
+        Some((range.start as _, range.end as _))
+    }
+
+    #[inline]
+    fn data(&self) -> Result<&'data [u8]> {
+        let mut reader = self.section.get_binary_reader();
+        // TODO: raise a feature request upstream to be able
+        // to get remaining slice from a BinaryReader directly.
+        Ok(reader.read_bytes(reader.bytes_remaining()).unwrap())
+    }
+
+    fn data_range(&self, _address: u64, _size: u64) -> Result<Option<&'data [u8]>> {
+        unimplemented!()
+    }
+
+    #[inline]
+    fn compressed_file_range(&self) -> Result<CompressedFileRange> {
+        Ok(CompressedFileRange::none(self.file_range()))
+    }
+
+    #[inline]
+    fn compressed_data(&self) -> Result<CompressedData<'data>> {
+        self.data().map(CompressedData::none)
+    }
+
+    #[inline]
+    fn name_bytes(&self) -> Result<&[u8]> {
+        self.name().map(str::as_bytes)
+    }
+
+    #[inline]
+    fn name(&self) -> Result<&str> {
+        Ok(match self.section.code {
+            wp::SectionCode::Custom { name, .. } => name,
+            wp::SectionCode::Type => "<type>",
+            wp::SectionCode::Import => "<import>",
+            wp::SectionCode::Function => "<function>",
+            wp::SectionCode::Table => "<table>",
+            wp::SectionCode::Memory => "<memory>",
+            wp::SectionCode::Global => "<global>",
+            wp::SectionCode::Export => "<export>",
+            wp::SectionCode::Start => "<start>",
+            wp::SectionCode::Element => "<element>",
+            wp::SectionCode::Code => "<code>",
+            wp::SectionCode::Data => "<data>",
+            wp::SectionCode::DataCount => "<data_count>",
+        })
+    }
+
+    #[inline]
+    fn segment_name_bytes(&self) -> Result<Option<&[u8]>> {
+        Ok(None)
+    }
+
+    #[inline]
+    fn segment_name(&self) -> Result<Option<&str>> {
+        Ok(None)
+    }
+
+    #[inline]
+    fn kind(&self) -> SectionKind {
+        match self.section.code {
+            wp::SectionCode::Custom { kind, .. } => match kind {
+                wp::CustomSectionKind::Reloc | wp::CustomSectionKind::Linking => {
+                    SectionKind::Linker
+                }
+                _ => SectionKind::Other,
+            },
+            wp::SectionCode::Type => SectionKind::Metadata,
+            wp::SectionCode::Import => SectionKind::Linker,
+            wp::SectionCode::Function => SectionKind::Metadata,
+            wp::SectionCode::Table => SectionKind::UninitializedData,
+            wp::SectionCode::Memory => SectionKind::UninitializedData,
+            wp::SectionCode::Global => SectionKind::Data,
+            wp::SectionCode::Export => SectionKind::Linker,
+            wp::SectionCode::Start => SectionKind::Linker,
+            wp::SectionCode::Element => SectionKind::Data,
+            wp::SectionCode::Code => SectionKind::Text,
+            wp::SectionCode::Data => SectionKind::Data,
+            wp::SectionCode::DataCount => SectionKind::UninitializedData,
+        }
+    }
+
+    #[inline]
+    fn relocations(&self) -> WasmRelocationIterator<'data, 'file, R> {
+        WasmRelocationIterator(PhantomData)
+    }
+
+    #[inline]
+    fn flags(&self) -> SectionFlags {
+        SectionFlags::None
+    }
+}
+
+/// An iterator over the COMDAT section groups of a `WasmFile`.
+#[derive(Debug)]
+pub struct WasmComdatIterator<'data, 'file, R = &'data [u8]> {
+    #[allow(unused)]
+    file: &'file WasmFile<'data, R>,
+}
+
+impl<'data, 'file, R> Iterator for WasmComdatIterator<'data, 'file, R> {
+    type Item = WasmComdat<'data, 'file, R>;
+
+    #[inline]
+    fn next(&mut self) -> Option<Self::Item> {
+        None
+    }
+}
+
+/// A COMDAT section group of a `WasmFile`.
+#[derive(Debug)]
+pub struct WasmComdat<'data, 'file, R = &'data [u8]> {
+    #[allow(unused)]
+    file: &'file WasmFile<'data, R>,
+}
+
+impl<'data, 'file, R> read::private::Sealed for WasmComdat<'data, 'file, R> {}
+
+impl<'data, 'file, R> ObjectComdat<'data> for WasmComdat<'data, 'file, R> {
+    type SectionIterator = WasmComdatSectionIterator<'data, 'file, R>;
+
+    #[inline]
+    fn kind(&self) -> ComdatKind {
+        unreachable!();
+    }
+
+    #[inline]
+    fn symbol(&self) -> SymbolIndex {
+        unreachable!();
+    }
+
+    #[inline]
+    fn name_bytes(&self) -> Result<&[u8]> {
+        unreachable!();
+    }
+
+    #[inline]
+    fn name(&self) -> Result<&str> {
+        unreachable!();
+    }
+
+    #[inline]
+    fn sections(&self) -> Self::SectionIterator {
+        unreachable!();
+    }
+}
+
+/// An iterator over the sections in a COMDAT section group of a `WasmFile`.
+#[derive(Debug)]
+pub struct WasmComdatSectionIterator<'data, 'file, R = &'data [u8]>
+where
+    'data: 'file,
+{
+    #[allow(unused)]
+    file: &'file WasmFile<'data, R>,
+}
+
+impl<'data, 'file, R> Iterator for WasmComdatSectionIterator<'data, 'file, R> {
+    type Item = SectionIndex;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        None
+    }
+}
+
+/// A symbol table of a `WasmFile`.
+#[derive(Debug)]
+pub struct WasmSymbolTable<'data, 'file> {
+    symbols: &'file [WasmSymbolInternal<'data>],
+}
+
+impl<'data, 'file> read::private::Sealed for WasmSymbolTable<'data, 'file> {}
+
+impl<'data, 'file> ObjectSymbolTable<'data> for WasmSymbolTable<'data, 'file> {
+    type Symbol = WasmSymbol<'data, 'file>;
+    type SymbolIterator = WasmSymbolIterator<'data, 'file>;
+
+    fn symbols(&self) -> Self::SymbolIterator {
+        WasmSymbolIterator {
+            symbols: self.symbols.iter().enumerate(),
+        }
+    }
+
+    fn symbol_by_index(&self, index: SymbolIndex) -> Result<Self::Symbol> {
+        let symbol = self
+            .symbols
+            .get(index.0)
+            .read_error("Invalid Wasm symbol index")?;
+        Ok(WasmSymbol { index, symbol })
+    }
+}
+
+/// An iterator over the symbols of a `WasmFile`.
+#[derive(Debug)]
+pub struct WasmSymbolIterator<'data, 'file> {
+    symbols: core::iter::Enumerate<slice::Iter<'file, WasmSymbolInternal<'data>>>,
+}
+
+impl<'data, 'file> Iterator for WasmSymbolIterator<'data, 'file> {
+    type Item = WasmSymbol<'data, 'file>;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        let (index, symbol) = self.symbols.next()?;
+        Some(WasmSymbol {
+            index: SymbolIndex(index),
+            symbol,
+        })
+    }
+}
+
+/// A symbol of a `WasmFile`.
+#[derive(Clone, Copy, Debug)]
+pub struct WasmSymbol<'data, 'file> {
+    index: SymbolIndex,
+    symbol: &'file WasmSymbolInternal<'data>,
+}
+
+#[derive(Clone, Debug)]
+struct WasmSymbolInternal<'data> {
+    name: &'data str,
+    address: u64,
+    size: u64,
+    kind: SymbolKind,
+    section: SymbolSection,
+    scope: SymbolScope,
+}
+
+impl<'data, 'file> read::private::Sealed for WasmSymbol<'data, 'file> {}
+
+impl<'data, 'file> ObjectSymbol<'data> for WasmSymbol<'data, 'file> {
+    #[inline]
+    fn index(&self) -> SymbolIndex {
+        self.index
+    }
+
+    #[inline]
+    fn name_bytes(&self) -> read::Result<&'data [u8]> {
+        Ok(self.symbol.name.as_bytes())
+    }
+
+    #[inline]
+    fn name(&self) -> read::Result<&'data str> {
+        Ok(self.symbol.name)
+    }
+
+    #[inline]
+    fn address(&self) -> u64 {
+        self.symbol.address
+    }
+
+    #[inline]
+    fn size(&self) -> u64 {
+        self.symbol.size
+    }
+
+    #[inline]
+    fn kind(&self) -> SymbolKind {
+        self.symbol.kind
+    }
+
+    #[inline]
+    fn section(&self) -> SymbolSection {
+        self.symbol.section
+    }
+
+    #[inline]
+    fn is_undefined(&self) -> bool {
+        self.symbol.section == SymbolSection::Undefined
+    }
+
+    #[inline]
+    fn is_definition(&self) -> bool {
+        self.symbol.kind == SymbolKind::Text && self.symbol.section != SymbolSection::Undefined
+    }
+
+    #[inline]
+    fn is_common(&self) -> bool {
+        self.symbol.section == SymbolSection::Common
+    }
+
+    #[inline]
+    fn is_weak(&self) -> bool {
+        false
+    }
+
+    #[inline]
+    fn scope(&self) -> SymbolScope {
+        self.symbol.scope
+    }
+
+    #[inline]
+    fn is_global(&self) -> bool {
+        self.symbol.scope != SymbolScope::Compilation
+    }
+
+    #[inline]
+    fn is_local(&self) -> bool {
+        self.symbol.scope == SymbolScope::Compilation
+    }
+
+    #[inline]
+    fn flags(&self) -> SymbolFlags<SectionIndex> {
+        SymbolFlags::None
+    }
+}
+
+/// An iterator over the relocations in a `WasmSection`.
+#[derive(Debug)]
+pub struct WasmRelocationIterator<'data, 'file, R = &'data [u8]>(
+    PhantomData<(&'data (), &'file (), R)>,
+);
+
+impl<'data, 'file, R> Iterator for WasmRelocationIterator<'data, 'file, R> {
+    type Item = (u64, Relocation);
+
+    #[inline]
+    fn next(&mut self) -> Option<Self::Item> {
+        None
+    }
+}
+
+fn section_code_to_id(code: wp::SectionCode) -> usize {
+    match code {
+        wp::SectionCode::Custom { .. } => SECTION_CUSTOM,
+        wp::SectionCode::Type => SECTION_TYPE,
+        wp::SectionCode::Import => SECTION_IMPORT,
+        wp::SectionCode::Function => SECTION_FUNCTION,
+        wp::SectionCode::Table => SECTION_TABLE,
+        wp::SectionCode::Memory => SECTION_MEMORY,
+        wp::SectionCode::Global => SECTION_GLOBAL,
+        wp::SectionCode::Export => SECTION_EXPORT,
+        wp::SectionCode::Start => SECTION_START,
+        wp::SectionCode::Element => SECTION_ELEMENT,
+        wp::SectionCode::Code => SECTION_CODE,
+        wp::SectionCode::Data => SECTION_DATA,
+        wp::SectionCode::DataCount => SECTION_DATA_COUNT,
+    }
+}
diff --git a/third_party/rust/object/src/read/xcoff/comdat.rs b/third_party/rust/object/src/read/xcoff/comdat.rs
new file mode 100644
index 0000000000..eeed2f54d6
--- /dev/null
+++ b/third_party/rust/object/src/read/xcoff/comdat.rs
@@ -0,0 +1,130 @@
+//! XCOFF doesn't support the COMDAT section.
+
+use core::fmt::Debug;
+
+use crate::xcoff;
+
+use crate::read::{self, ComdatKind, ObjectComdat, ReadRef, Result, SectionIndex, SymbolIndex};
+
+use super::{FileHeader, XcoffFile};
+
+/// An iterator over the COMDAT section groups of a `XcoffFile32`.
+pub type XcoffComdatIterator32<'data, 'file, R = &'data [u8]> =
+    XcoffComdatIterator<'data, 'file, xcoff::FileHeader32, R>;
+/// An iterator over the COMDAT section groups of a `XcoffFile64`.
+pub type XcoffComdatIterator64<'data, 'file, R = &'data [u8]> =
+    XcoffComdatIterator<'data, 'file, xcoff::FileHeader64, R>;
+
+/// An iterator over the COMDAT section groups of a `XcoffFile`.
+#[derive(Debug)]
+pub struct XcoffComdatIterator<'data, 'file, Xcoff, R = &'data [u8]>
+where
+    Xcoff: FileHeader,
+    R: ReadRef<'data>,
+{
+    #[allow(unused)]
+    pub(crate) file: &'file XcoffFile<'data, Xcoff, R>,
+}
+
+impl<'data, 'file, Xcoff, R> Iterator for XcoffComdatIterator<'data, 'file, Xcoff, R>
+where
+    Xcoff: FileHeader,
+    R: ReadRef<'data>,
+{
+    type Item = XcoffComdat<'data, 'file, Xcoff, R>;
+
+    #[inline]
+    fn next(&mut self) -> Option<Self::Item> {
+        None
+    }
+}
+
+/// A COMDAT section group of a `XcoffFile32`.
+pub type XcoffComdat32<'data, 'file, R = &'data [u8]> =
+    XcoffComdat<'data, 'file, xcoff::FileHeader32, R>;
+
+/// A COMDAT section group of a `XcoffFile64`.
+pub type XcoffComdat64<'data, 'file, R = &'data [u8]> =
+    XcoffComdat<'data, 'file, xcoff::FileHeader64, R>;
+
+/// A COMDAT section group of a `XcoffFile`.
+#[derive(Debug)]
+pub struct XcoffComdat<'data, 'file, Xcoff, R = &'data [u8]>
+where
+    Xcoff: FileHeader,
+    R: ReadRef<'data>,
+{
+    #[allow(unused)]
+    file: &'file XcoffFile<'data, Xcoff, R>,
+}
+
+impl<'data, 'file, Xcoff, R> read::private::Sealed for XcoffComdat<'data, 'file, Xcoff, R>
+where
+    Xcoff: FileHeader,
+    R: ReadRef<'data>,
+{
+}
+
+impl<'data, 'file, Xcoff, R> ObjectComdat<'data> for XcoffComdat<'data, 'file, Xcoff, R>
+where
+    Xcoff: FileHeader,
+    R: ReadRef<'data>,
+{
+    type SectionIterator = XcoffComdatSectionIterator<'data, 'file, Xcoff, R>;
+
+    #[inline]
+    fn kind(&self) -> ComdatKind {
+        unreachable!();
+    }
+
+    #[inline]
+    fn symbol(&self) -> SymbolIndex {
+        unreachable!();
+    }
+
+    #[inline]
+    fn name_bytes(&self) -> Result<&[u8]> {
+        unreachable!();
+    }
+
+    #[inline]
+    fn name(&self) -> Result<&str> {
+        unreachable!();
+    }
+
+    #[inline]
+    fn sections(&self) -> Self::SectionIterator {
+        unreachable!();
+    }
+}
+
+/// An iterator over the sections in a COMDAT section group of a `XcoffFile32`.
+pub type XcoffComdatSectionIterator32<'data, 'file, R = &'data [u8]> =
+    XcoffComdatSectionIterator<'data, 'file, xcoff::FileHeader32, R>;
+/// An iterator over the sections in a COMDAT section group of a `XcoffFile64`.
+pub type XcoffComdatSectionIterator64<'data, 'file, R = &'data [u8]> =
+    XcoffComdatSectionIterator<'data, 'file, xcoff::FileHeader64, R>;
+
+/// An iterator over the sections in a COMDAT section group of a `XcoffFile`.
+#[derive(Debug)]
+pub struct XcoffComdatSectionIterator<'data, 'file, Xcoff, R = &'data [u8]>
+where
+    'data: 'file,
+    Xcoff: FileHeader,
+    R: ReadRef<'data>,
+{
+    #[allow(unused)]
+    file: &'file XcoffFile<'data, Xcoff, R>,
+}
+
+impl<'data, 'file, Xcoff, R> Iterator for XcoffComdatSectionIterator<'data, 'file, Xcoff, R>
+where
+    Xcoff: FileHeader,
+    R: ReadRef<'data>,
+{
+    type Item = SectionIndex;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        None
+    }
+}
diff --git a/third_party/rust/object/src/read/xcoff/file.rs b/third_party/rust/object/src/read/xcoff/file.rs
new file mode 100644
index 0000000000..bac9e70756
--- /dev/null
+++ b/third_party/rust/object/src/read/xcoff/file.rs
@@ -0,0 +1,629 @@
+use core::fmt::Debug;
+use core::mem;
+
+use alloc::vec::Vec;
+
+use crate::read::{self, Error, NoDynamicRelocationIterator, Object, ReadError, ReadRef, Result};
+
+use crate::{
+    xcoff, Architecture, BigEndian as BE, FileFlags, ObjectKind, ObjectSection, Pod, SectionIndex,
+    SymbolIndex,
+};
+
+use super::{
+    CsectAux, FileAux, SectionHeader, SectionTable, Symbol, SymbolTable, XcoffComdat,
+    XcoffComdatIterator, XcoffSection, XcoffSectionIterator, XcoffSegment, XcoffSegmentIterator,
+    XcoffSymbol, XcoffSymbolIterator, XcoffSymbolTable,
+};
+
+/// A 32-bit XCOFF object file.
+pub type XcoffFile32<'data, R = &'data [u8]> = XcoffFile<'data, xcoff::FileHeader32, R>;
+/// A 64-bit XCOFF object file.
+pub type XcoffFile64<'data, R = &'data [u8]> = XcoffFile<'data, xcoff::FileHeader64, R>;
+
+/// A partially parsed XCOFF file.
+///
+/// Most of the functionality of this type is provided by the `Object` trait implementation.
+#[derive(Debug)]
+pub struct XcoffFile<'data, Xcoff, R = &'data [u8]>
+where
+    Xcoff: FileHeader,
+    R: ReadRef<'data>,
+{
+    pub(super) data: R,
+    pub(super) header: &'data Xcoff,
+    pub(super) aux_header: Option<&'data Xcoff::AuxHeader>,
+    pub(super) sections: SectionTable<'data, Xcoff>,
+    pub(super) symbols: SymbolTable<'data, Xcoff, R>,
+}
+
+impl<'data, Xcoff, R> XcoffFile<'data, Xcoff, R>
+where
+    Xcoff: FileHeader,
+    R: ReadRef<'data>,
+{
+    /// Parse the raw XCOFF file data.
+    pub fn parse(data: R) -> Result<Self> {
+        let mut offset = 0;
+        let header = Xcoff::parse(data, &mut offset)?;
+        let aux_header = header.aux_header(data, &mut offset)?;
+        let sections = header.sections(data, &mut offset)?;
+        let symbols = header.symbols(data)?;
+
+        Ok(XcoffFile {
+            data,
+            header,
+            aux_header,
+            sections,
+            symbols,
+        })
+    }
+
+    /// Returns the raw data.
+    pub fn data(&self) -> R {
+        self.data
+    }
+
+    /// Returns the raw XCOFF file header.
+    pub fn raw_header(&self) -> &'data Xcoff {
+        self.header
+    }
+}
+
+impl<'data, Xcoff, R> read::private::Sealed for XcoffFile<'data, Xcoff, R>
+where
+    Xcoff: FileHeader,
+    R: ReadRef<'data>,
+{
+}
+
+impl<'data, 'file, Xcoff, R> Object<'data, 'file> for XcoffFile<'data, Xcoff, R>
+where
+    'data: 'file,
+    Xcoff: FileHeader,
+    R: 'file + ReadRef<'data>,
+{
+    type Segment = XcoffSegment<'data, 'file, Xcoff, R>;
+    type SegmentIterator = XcoffSegmentIterator<'data, 'file, Xcoff, R>;
+    type Section = XcoffSection<'data, 'file, Xcoff, R>;
+    type SectionIterator = XcoffSectionIterator<'data, 'file, Xcoff, R>;
+    type Comdat = XcoffComdat<'data, 'file, Xcoff, R>;
+    type ComdatIterator = XcoffComdatIterator<'data, 'file, Xcoff, R>;
+    type Symbol = XcoffSymbol<'data, 'file, Xcoff, R>;
+    type SymbolIterator = XcoffSymbolIterator<'data, 'file, Xcoff, R>;
+    type SymbolTable = XcoffSymbolTable<'data, 'file, Xcoff, R>;
+    type DynamicRelocationIterator = NoDynamicRelocationIterator;
+
+    fn architecture(&self) -> crate::Architecture {
+        if self.is_64() {
+            Architecture::PowerPc64
+        } else {
+            Architecture::PowerPc
+        }
+    }
+
+    fn is_little_endian(&self) -> bool {
+        false
+    }
+
+    fn is_64(&self) -> bool {
+        self.header.is_type_64()
+    }
+
+    fn kind(&self) -> ObjectKind {
+        let flags = self.header.f_flags();
+        if flags & xcoff::F_EXEC != 0 {
+            ObjectKind::Executable
+        } else if flags & xcoff::F_SHROBJ != 0 {
+            ObjectKind::Dynamic
+        } else if flags & xcoff::F_RELFLG == 0 {
+            ObjectKind::Relocatable
+        } else {
+            ObjectKind::Unknown
+        }
+    }
+
+    fn segments(&'file self) -> XcoffSegmentIterator<'data, 'file, Xcoff, R> {
+        XcoffSegmentIterator { file: self }
+    }
+
+    fn section_by_name_bytes(
+        &'file self,
+        section_name: &[u8],
+    ) -> Option<XcoffSection<'data, 'file, Xcoff, R>> {
+        self.sections()
+            .find(|section| section.name_bytes() == Ok(section_name))
+    }
+
+    fn section_by_index(
+        &'file self,
+        index: SectionIndex,
+    ) -> Result<XcoffSection<'data, 'file, Xcoff, R>> {
+        let section = self.sections.section(index)?;
+        Ok(XcoffSection {
+            file: self,
+            section,
+            index,
+        })
+    }
+
+    fn sections(&'file self) -> XcoffSectionIterator<'data, 'file, Xcoff, R> {
+        XcoffSectionIterator {
+            file: self,
+            iter: self.sections.iter().enumerate(),
+        }
+    }
+
+    fn comdats(&'file self) -> XcoffComdatIterator<'data, 'file, Xcoff, R> {
+        XcoffComdatIterator { file: self }
+    }
+
+    fn symbol_table(&'file self) -> Option<XcoffSymbolTable<'data, 'file, Xcoff, R>> {
+        if self.symbols.is_empty() {
+            return None;
+        }
+        Some(XcoffSymbolTable {
+            symbols: &self.symbols,
+            file: self,
+        })
+    }
+
+    fn symbol_by_index(
+        &'file self,
+        index: SymbolIndex,
+    ) -> Result<XcoffSymbol<'data, 'file, Xcoff, R>> {
+        let symbol = self.symbols.symbol(index.0)?;
+        Ok(XcoffSymbol {
+            symbols: &self.symbols,
+            index,
+            symbol,
+            file: self,
+        })
+    }
+
+    fn symbols(&'file self) -> XcoffSymbolIterator<'data, 'file, Xcoff, R> {
+        XcoffSymbolIterator {
+            symbols: &self.symbols,
+            index: 0,
+            file: self,
+        }
+    }
+
+    fn dynamic_symbol_table(&'file self) -> Option<XcoffSymbolTable<'data, 'file, Xcoff, R>> {
+        None
+    }
+
+    fn dynamic_symbols(&'file self) -> XcoffSymbolIterator<'data, 'file, Xcoff, R> {
+        // TODO: return the symbols in the STYP_LOADER section.
+        XcoffSymbolIterator {
+            file: self,
+            symbols: &self.symbols,
+            // Hack: don't return any.
+            index: self.symbols.len(),
+        }
+    }
+
+    fn dynamic_relocations(&'file self) -> Option<Self::DynamicRelocationIterator> {
+        // TODO: return the relocations in the STYP_LOADER section.
+        None
+    }
+
+    fn imports(&self) -> Result<alloc::vec::Vec<crate::Import<'data>>> {
+        // TODO: return the imports in the STYP_LOADER section.
+        Ok(Vec::new())
+    }
+
+    fn exports(&self) -> Result<alloc::vec::Vec<crate::Export<'data>>> {
+        // TODO: return the exports in the STYP_LOADER section.
+        Ok(Vec::new())
+    }
+
+    fn has_debug_symbols(&self) -> bool {
+        self.section_by_name(".debug").is_some() || self.section_by_name(".dwinfo").is_some()
+    }
+
+    fn relative_address_base(&'file self) -> u64 {
+        0
+    }
+
+    fn entry(&'file self) -> u64 {
+        if let Some(aux_header) = self.aux_header {
+            aux_header.o_entry().into()
+        } else {
+            0
+        }
+    }
+
+    fn flags(&self) -> FileFlags {
+        FileFlags::Xcoff {
+            f_flags: self.header.f_flags(),
+        }
+    }
+}
+
+/// A trait for generic access to `FileHeader32` and `FileHeader64`.
+#[allow(missing_docs)]
+pub trait FileHeader: Debug + Pod {
+    type Word: Into<u64>;
+    type AuxHeader: AuxHeader<Word = Self::Word>;
+    type SectionHeader: SectionHeader<Word = Self::Word>;
+    type Symbol: Symbol<Word = Self::Word>;
+    type FileAux: FileAux;
+    type CsectAux: CsectAux;
+
+    /// Return true if this type is a 64-bit header.
+    fn is_type_64(&self) -> bool;
+
+    fn f_magic(&self) -> u16;
+    fn f_nscns(&self) -> u16;
+    fn f_timdat(&self) -> u32;
+    fn f_symptr(&self) -> Self::Word;
+    fn f_nsyms(&self) -> u32;
+    fn f_opthdr(&self) -> u16;
+    fn f_flags(&self) -> u16;
+
+    // Provided methods.
+
+    /// Read the file header.
+    ///
+    /// Also checks that the magic field in the file header is a supported format.
+    fn parse<'data, R: ReadRef<'data>>(data: R, offset: &mut u64) -> Result<&'data Self> {
+        let header = data
+            .read::<Self>(offset)
+            .read_error("Invalid XCOFF header size or alignment")?;
+        if !header.is_supported() {
+            return Err(Error("Unsupported XCOFF header"));
+        }
+        Ok(header)
+    }
+
+    fn is_supported(&self) -> bool {
+        (self.is_type_64() && self.f_magic() == xcoff::MAGIC_64)
+            || (!self.is_type_64() && self.f_magic() == xcoff::MAGIC_32)
+    }
+
+    /// Read the auxiliary file header.
+    fn aux_header<'data, R: ReadRef<'data>>(
+        &self,
+        data: R,
+        offset: &mut u64,
+    ) -> Result<Option<&'data Self::AuxHeader>> {
+        let aux_header_size = self.f_opthdr();
+        if self.f_flags() & xcoff::F_EXEC == 0 {
+            // No auxiliary header is required for an object file that is not an executable.
+            // TODO: Some AIX programs generate auxiliary headers for 32-bit object files
+            // that end after the data_start field.
+            *offset += u64::from(aux_header_size);
+            return Ok(None);
+        }
+        // Executables, however, must have auxiliary headers that include the
+        // full structure definitions.
+        if aux_header_size != mem::size_of::<Self::AuxHeader>() as u16 {
+            *offset += u64::from(aux_header_size);
+            return Ok(None);
+        }
+        let aux_header = data
+            .read::<Self::AuxHeader>(offset)
+            .read_error("Invalid XCOFF auxiliary header size")?;
+        Ok(Some(aux_header))
+    }
+
+    /// Read the section table.
+    #[inline]
+    fn sections<'data, R: ReadRef<'data>>(
+        &self,
+        data: R,
+        offset: &mut u64,
+    ) -> Result<SectionTable<'data, Self>> {
+        SectionTable::parse(self, data, offset)
+    }
+
+    /// Return the symbol table.
+    #[inline]
+    fn symbols<'data, R: ReadRef<'data>>(&self, data: R) -> Result<SymbolTable<'data, Self, R>> {
+        SymbolTable::parse(*self, data)
+    }
+}
+
+impl FileHeader for xcoff::FileHeader32 {
+    type Word = u32;
+    type AuxHeader = xcoff::AuxHeader32;
+    type SectionHeader = xcoff::SectionHeader32;
+    type Symbol = xcoff::Symbol32;
+    type FileAux = xcoff::FileAux32;
+    type CsectAux = xcoff::CsectAux32;
+
+    fn is_type_64(&self) -> bool {
+        false
+    }
+
+    fn f_magic(&self) -> u16 {
+        self.f_magic.get(BE)
+    }
+
+    fn f_nscns(&self) -> u16 {
+        self.f_nscns.get(BE)
+    }
+
+    fn f_timdat(&self) -> u32 {
+        self.f_timdat.get(BE)
+    }
+
+    fn f_symptr(&self) -> Self::Word {
+        self.f_symptr.get(BE)
+    }
+
+    fn f_nsyms(&self) -> u32 {
+        self.f_nsyms.get(BE)
+    }
+
+    fn f_opthdr(&self) -> u16 {
+        self.f_opthdr.get(BE)
+    }
+
+    fn f_flags(&self) -> u16 {
+        self.f_flags.get(BE)
+    }
+}
+
+impl FileHeader for xcoff::FileHeader64 {
+    type Word = u64;
+    type AuxHeader = xcoff::AuxHeader64;
+    type SectionHeader = xcoff::SectionHeader64;
+    type Symbol = xcoff::Symbol64;
+    type FileAux = xcoff::FileAux64;
+    type CsectAux = xcoff::CsectAux64;
+
+    fn is_type_64(&self) -> bool {
+        true
+    }
+
+    fn f_magic(&self) -> u16 {
+        self.f_magic.get(BE)
+    }
+
+    fn f_nscns(&self) -> u16 {
+        self.f_nscns.get(BE)
+    }
+
+    fn f_timdat(&self) -> u32 {
+        self.f_timdat.get(BE)
+    }
+
+    fn f_symptr(&self) -> Self::Word {
+        self.f_symptr.get(BE)
+    }
+
+    fn f_nsyms(&self) -> u32 {
+        self.f_nsyms.get(BE)
+    }
+
+    fn f_opthdr(&self) -> u16 {
+        self.f_opthdr.get(BE)
+    }
+
+    fn f_flags(&self) -> u16 {
+        self.f_flags.get(BE)
+    }
+}
+
+#[allow(missing_docs)]
+pub trait AuxHeader: Debug + Pod {
+    type Word: Into<u64>;
+
+    fn o_vstamp(&self) -> u16;
+    fn o_tsize(&self) -> Self::Word;
+    fn o_dsize(&self) -> Self::Word;
+    fn o_bsize(&self) -> Self::Word;
+    fn o_entry(&self) -> Self::Word;
+    fn o_text_start(&self) -> Self::Word;
+    fn o_data_start(&self) -> Self::Word;
+    fn o_toc(&self) -> Self::Word;
+    fn o_snentry(&self) -> u16;
+    fn o_sntext(&self) -> u16;
+    fn o_sndata(&self) -> u16;
+    fn o_sntoc(&self) -> u16;
+    fn o_snloader(&self) -> u16;
+    fn o_snbss(&self) -> u16;
+    fn o_sntdata(&self) -> u16;
+    fn o_sntbss(&self) -> u16;
+    fn o_algntext(&self) -> u16;
+    fn o_algndata(&self) -> u16;
+    fn o_maxstack(&self) -> Self::Word;
+    fn o_maxdata(&self) -> Self::Word;
+    fn o_textpsize(&self) -> u8;
+    fn o_datapsize(&self) -> u8;
+    fn o_stackpsize(&self) -> u8;
+}
+
+impl AuxHeader for xcoff::AuxHeader32 {
+    type Word = u32;
+
+    fn o_vstamp(&self) -> u16 {
+        self.o_vstamp.get(BE)
+    }
+
+    fn o_tsize(&self) -> Self::Word {
+        self.o_tsize.get(BE)
+    }
+
+    fn o_dsize(&self) -> Self::Word {
+        self.o_dsize.get(BE)
+    }
+
+    fn o_bsize(&self) -> Self::Word {
+        self.o_bsize.get(BE)
+    }
+
+    fn o_entry(&self) -> Self::Word {
+        self.o_entry.get(BE)
+    }
+
+    fn o_text_start(&self) -> Self::Word {
+        self.o_text_start.get(BE)
+    }
+
+    fn o_data_start(&self) -> Self::Word {
+        self.o_data_start.get(BE)
+    }
+
+    fn o_toc(&self) -> Self::Word {
+        self.o_toc.get(BE)
+    }
+
+    fn o_snentry(&self) -> u16 {
+        self.o_snentry.get(BE)
+    }
+
+    fn o_sntext(&self) -> u16 {
+        self.o_sntext.get(BE)
+    }
+
+    fn o_sndata(&self) -> u16 {
+        self.o_sndata.get(BE)
+    }
+
+    fn o_sntoc(&self) -> u16 {
+        self.o_sntoc.get(BE)
+    }
+
+    fn o_snloader(&self) -> u16 {
+        self.o_snloader.get(BE)
+    }
+
+    fn o_snbss(&self) -> u16 {
+        self.o_snbss.get(BE)
+    }
+
+    fn o_sntdata(&self) -> u16 {
+        self.o_sntdata.get(BE)
+    }
+
+    fn o_sntbss(&self) -> u16 {
+        self.o_sntbss.get(BE)
+    }
+
+    fn o_algntext(&self) -> u16 {
+        self.o_algntext.get(BE)
+    }
+
+    fn o_algndata(&self) -> u16 {
+        self.o_algndata.get(BE)
+    }
+
+    fn o_maxstack(&self) -> Self::Word {
+        self.o_maxstack.get(BE)
+    }
+
+    fn o_maxdata(&self) -> Self::Word {
+        self.o_maxdata.get(BE)
+    }
+
+    fn o_textpsize(&self) -> u8 {
+        self.o_textpsize
+    }
+
+    fn o_datapsize(&self) -> u8 {
+        self.o_datapsize
+    }
+
+    fn o_stackpsize(&self) -> u8 {
+        self.o_stackpsize
+    }
+}
+
+impl AuxHeader for xcoff::AuxHeader64 {
+    type Word = u64;
+
+    fn o_vstamp(&self) -> u16 {
+        self.o_vstamp.get(BE)
+    }
+
+    fn o_tsize(&self) -> Self::Word {
+        self.o_tsize.get(BE)
+    }
+
+    fn o_dsize(&self) -> Self::Word {
+        self.o_dsize.get(BE)
+    }
+
+    fn o_bsize(&self) -> Self::Word {
+        self.o_bsize.get(BE)
+    }
+
+    fn o_entry(&self) -> Self::Word {
+        self.o_entry.get(BE)
+    }
+
+    fn o_text_start(&self) -> Self::Word {
+        self.o_text_start.get(BE)
+    }
+
+    fn o_data_start(&self) -> Self::Word {
+        self.o_data_start.get(BE)
+    }
+
+    fn o_toc(&self) -> Self::Word {
+        self.o_toc.get(BE)
+    }
+
+    fn o_snentry(&self) -> u16 {
+        self.o_snentry.get(BE)
+    }
+
+    fn o_sntext(&self) -> u16 {
+        self.o_sntext.get(BE)
+    }
+
+    fn o_sndata(&self) -> u16 {
+        self.o_sndata.get(BE)
+    }
+
+    fn o_sntoc(&self) -> u16 {
+        self.o_sntoc.get(BE)
+    }
+
+    fn o_snloader(&self) -> u16 {
+        self.o_snloader.get(BE)
+    }
+
+    fn o_snbss(&self) -> u16 {
+        self.o_snbss.get(BE)
+    }
+
+    fn o_sntdata(&self) -> u16 {
+        self.o_sntdata.get(BE)
+    }
+
+    fn o_sntbss(&self) -> u16 {
+        self.o_sntbss.get(BE)
+    }
+
+    fn o_algntext(&self) -> u16 {
+        self.o_algntext.get(BE)
+    }
+
+    fn o_algndata(&self) -> u16 {
+        self.o_algndata.get(BE)
+    }
+
+    fn o_maxstack(&self) -> Self::Word {
+        self.o_maxstack.get(BE)
+    }
+
+    fn o_maxdata(&self) -> Self::Word {
+        self.o_maxdata.get(BE)
+    }
+
+    fn o_textpsize(&self) -> u8 {
+        self.o_textpsize
+    }
+
+    fn o_datapsize(&self) -> u8 {
+        self.o_datapsize
+    }
+
+    fn o_stackpsize(&self) -> u8 {
+        self.o_stackpsize
+    }
+}
diff --git a/third_party/rust/object/src/read/xcoff/mod.rs b/third_party/rust/object/src/read/xcoff/mod.rs
new file mode 100644
index 0000000000..136e31073b
--- /dev/null
+++ b/third_party/rust/object/src/read/xcoff/mod.rs
@@ -0,0 +1,21 @@
+//! Support for reading AIX XCOFF files.
+//!
+//! Provides `XcoffFile` and related types which implement the `Object` trait.
+
+mod file;
+pub use file::*;
+
+mod section;
+pub use section::*;
+
+mod symbol;
+pub use symbol::*;
+
+mod relocation;
+pub use relocation::*;
+
+mod comdat;
+pub use comdat::*;
+
+mod segment;
+pub use segment::*;
diff --git a/third_party/rust/object/src/read/xcoff/relocation.rs b/third_party/rust/object/src/read/xcoff/relocation.rs
new file mode 100644
index 0000000000..8107a2e826
--- /dev/null
+++ b/third_party/rust/object/src/read/xcoff/relocation.rs
@@ -0,0 +1,128 @@
+use alloc::fmt;
+use core::fmt::Debug;
+use core::slice;
+
+use crate::pod::Pod;
+use crate::{xcoff, BigEndian as BE, Relocation};
+
+use crate::read::{ReadRef, RelocationEncoding, RelocationKind, RelocationTarget, SymbolIndex};
+
+use super::{FileHeader, SectionHeader, XcoffFile};
+
+/// An iterator over the relocations in a `XcoffSection32`.
+pub type XcoffRelocationIterator32<'data, 'file, R = &'data [u8]> =
+    XcoffRelocationIterator<'data, 'file, xcoff::FileHeader32, R>;
+/// An iterator over the relocations in a `XcoffSection64`.
+pub type XcoffRelocationIterator64<'data, 'file, R = &'data [u8]> =
+    XcoffRelocationIterator<'data, 'file, xcoff::FileHeader64, R>;
+
+/// An iterator over the relocations in a `XcoffSection`.
+pub struct XcoffRelocationIterator<'data, 'file, Xcoff, R = &'data [u8]>
+where
+    'data: 'file,
+    Xcoff: FileHeader,
+    R: ReadRef<'data>,
+{
+    #[allow(unused)]
+    pub(super) file: &'file XcoffFile<'data, Xcoff, R>,
+    pub(super) relocations:
+        slice::Iter<'data, <<Xcoff as FileHeader>::SectionHeader as SectionHeader>::Rel>,
+}
+
+impl<'data, 'file, Xcoff, R> Iterator for XcoffRelocationIterator<'data, 'file, Xcoff, R>
+where
+    Xcoff: FileHeader,
+    R: ReadRef<'data>,
+{
+    type Item = (u64, Relocation);
+
+    fn next(&mut self) -> Option<Self::Item> {
+        self.relocations.next().map(|relocation| {
+            let encoding = RelocationEncoding::Generic;
+            let (kind, addend) = match relocation.r_rtype() {
+                xcoff::R_POS
+                | xcoff::R_RL
+                | xcoff::R_RLA
+                | xcoff::R_BA
+                | xcoff::R_RBA
+                | xcoff::R_TLS => (RelocationKind::Absolute, 0),
+                xcoff::R_REL | xcoff::R_BR | xcoff::R_RBR => (RelocationKind::Relative, -4),
+                xcoff::R_TOC | xcoff::R_TOCL | xcoff::R_TOCU => (RelocationKind::Got, 0),
+                r_type => (RelocationKind::Xcoff(r_type), 0),
+            };
+            let size = (relocation.r_rsize() & 0x3F) + 1;
+            let target = RelocationTarget::Symbol(SymbolIndex(relocation.r_symndx() as usize));
+            (
+                relocation.r_vaddr().into(),
+                Relocation {
+                    kind,
+                    encoding,
+                    size,
+                    target,
+                    addend,
+                    implicit_addend: true,
+                },
+            )
+        })
+    }
+}
+
+impl<'data, 'file, Xcoff, R> fmt::Debug for XcoffRelocationIterator<'data, 'file, Xcoff, R>
+where
+    Xcoff: FileHeader,
+    R: ReadRef<'data>,
+{
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("XcoffRelocationIterator").finish()
+    }
+}
+
+/// A trait for generic access to `Rel32` and `Rel64`.
+#[allow(missing_docs)]
+pub trait Rel: Debug + Pod {
+    type Word: Into<u64>;
+    fn r_vaddr(&self) -> Self::Word;
+    fn r_symndx(&self) -> u32;
+    fn r_rsize(&self) -> u8;
+    fn r_rtype(&self) -> u8;
+}
+
+impl Rel for xcoff::Rel32 {
+    type Word = u32;
+
+    fn r_vaddr(&self) -> Self::Word {
+        self.r_vaddr.get(BE)
+    }
+
+    fn r_symndx(&self) -> u32 {
+        self.r_symndx.get(BE)
+    }
+
+    fn r_rsize(&self) -> u8 {
+        self.r_rsize
+    }
+
+    fn r_rtype(&self) -> u8 {
+        self.r_rtype
+    }
+}
+
+impl Rel for xcoff::Rel64 {
+    type Word = u64;
+
+    fn r_vaddr(&self) -> Self::Word {
+        self.r_vaddr.get(BE)
+    }
+
+    fn r_symndx(&self) -> u32 {
+        self.r_symndx.get(BE)
+    }
+
+    fn r_rsize(&self) -> u8 {
+        self.r_rsize
+    }
+
+    fn r_rtype(&self) -> u8 {
+        self.r_rtype
+    }
+}
diff --git a/third_party/rust/object/src/read/xcoff/section.rs b/third_party/rust/object/src/read/xcoff/section.rs
new file mode 100644
index 0000000000..0944e10c83
--- /dev/null
+++ b/third_party/rust/object/src/read/xcoff/section.rs
@@ -0,0 +1,426 @@
+use core::fmt::Debug;
+use core::{iter, result, slice, str};
+
+use crate::{
+    xcoff, BigEndian as BE, CompressedData, CompressedFileRange, Pod, SectionFlags, SectionKind,
+};
+
+use crate::read::{self, Error, ObjectSection, ReadError, ReadRef, Result, SectionIndex};
+
+use super::{AuxHeader, FileHeader, Rel, XcoffFile, XcoffRelocationIterator};
+
+/// An iterator over the sections of an `XcoffFile32`.
+pub type XcoffSectionIterator32<'data, 'file, R = &'data [u8]> =
+    XcoffSectionIterator<'data, 'file, xcoff::FileHeader32, R>;
+/// An iterator over the sections of an `XcoffFile64`.
+pub type XcoffSectionIterator64<'data, 'file, R = &'data [u8]> =
+    XcoffSectionIterator<'data, 'file, xcoff::FileHeader64, R>;
+
+/// An iterator over the sections of an `XcoffFile`.
+#[derive(Debug)]
+pub struct XcoffSectionIterator<'data, 'file, Xcoff, R = &'data [u8]>
+where
+    Xcoff: FileHeader,
+    R: ReadRef<'data>,
+{
+    pub(super) file: &'file XcoffFile<'data, Xcoff, R>,
+    pub(super) iter: iter::Enumerate<slice::Iter<'data, Xcoff::SectionHeader>>,
+}
+
+impl<'data, 'file, Xcoff, R> Iterator for XcoffSectionIterator<'data, 'file, Xcoff, R>
+where
+    Xcoff: FileHeader,
+    R: ReadRef<'data>,
+{
+    type Item = XcoffSection<'data, 'file, Xcoff, R>;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        self.iter.next().map(|(index, section)| XcoffSection {
+            index: SectionIndex(index),
+            file: self.file,
+            section,
+        })
+    }
+}
+
+/// A section of an `XcoffFile32`.
+pub type XcoffSection32<'data, 'file, R = &'data [u8]> =
+    XcoffSection<'data, 'file, xcoff::FileHeader32, R>;
+/// A section of an `XcoffFile64`.
+pub type XcoffSection64<'data, 'file, R = &'data [u8]> =
+    XcoffSection<'data, 'file, xcoff::FileHeader64, R>;
+
+/// A section of an `XcoffFile`.
+#[derive(Debug)]
+pub struct XcoffSection<'data, 'file, Xcoff, R = &'data [u8]>
+where
+    'data: 'file,
+    Xcoff: FileHeader,
+    R: ReadRef<'data>,
+{
+    pub(super) file: &'file XcoffFile<'data, Xcoff, R>,
+    pub(super) section: &'data Xcoff::SectionHeader,
+    pub(super) index: SectionIndex,
+}
+
+impl<'data, 'file, Xcoff: FileHeader, R: ReadRef<'data>> XcoffSection<'data, 'file, Xcoff, R> {
+    fn bytes(&self) -> Result<&'data [u8]> {
+        self.section
+            .data(self.file.data)
+            .read_error("Invalid XCOFF section offset or size")
+    }
+}
+
+impl<'data, 'file, Xcoff, R> read::private::Sealed for XcoffSection<'data, 'file, Xcoff, R>
+where
+    Xcoff: FileHeader,
+    R: ReadRef<'data>,
+{
+}
+
+impl<'data, 'file, Xcoff, R> ObjectSection<'data> for XcoffSection<'data, 'file, Xcoff, R>
+where
+    Xcoff: FileHeader,
+    R: ReadRef<'data>,
+{
+    type RelocationIterator = XcoffRelocationIterator<'data, 'file, Xcoff, R>;
+
+    fn index(&self) -> SectionIndex {
+        self.index
+    }
+
+    fn address(&self) -> u64 {
+        self.section.s_paddr().into()
+    }
+
+    fn size(&self) -> u64 {
+        self.section.s_size().into()
+    }
+
+    fn align(&self) -> u64 {
+        // The default section alignment is 4.
+        if let Some(aux_header) = self.file.aux_header {
+            match self.kind() {
+                SectionKind::Text => aux_header.o_algntext().into(),
+                SectionKind::Data => aux_header.o_algndata().into(),
+                _ => 4,
+            }
+        } else {
+            4
+        }
+    }
+
+    fn file_range(&self) -> Option<(u64, u64)> {
+        self.section.file_range()
+    }
+
+    fn data(&self) -> Result<&'data [u8]> {
+        self.bytes()
+    }
+
+    fn data_range(&self, address: u64, size: u64) -> Result<Option<&'data [u8]>> {
+        Ok(read::util::data_range(
+            self.bytes()?,
+            self.address(),
+            address,
+            size,
+        ))
+    }
+
+    fn compressed_file_range(&self) -> Result<CompressedFileRange> {
+        Ok(CompressedFileRange::none(self.file_range()))
+    }
+
+    fn compressed_data(&self) -> Result<CompressedData<'data>> {
+        self.data().map(CompressedData::none)
+    }
+
+    fn name_bytes(&self) -> read::Result<&[u8]> {
+        Ok(self.section.name())
+    }
+
+    fn name(&self) -> read::Result<&str> {
+        let name = self.name_bytes()?;
+        str::from_utf8(name)
+            .ok()
+            .read_error("Non UTF-8 XCOFF section name")
+    }
+
+    fn segment_name_bytes(&self) -> Result<Option<&[u8]>> {
+        Ok(None)
+    }
+
+    fn segment_name(&self) -> Result<Option<&str>> {
+        Ok(None)
+    }
+
+    fn kind(&self) -> SectionKind {
+        let section_type = self.section.s_flags() as u16;
+        if section_type & xcoff::STYP_TEXT != 0 {
+            SectionKind::Text
+        } else if section_type & xcoff::STYP_DATA != 0 {
+            SectionKind::Data
+        } else if section_type & xcoff::STYP_TDATA != 0 {
+            SectionKind::Tls
+        } else if section_type & xcoff::STYP_BSS != 0 {
+            SectionKind::UninitializedData
+        } else if section_type & xcoff::STYP_TBSS != 0 {
+            SectionKind::UninitializedTls
+        } else if section_type & (xcoff::STYP_DEBUG | xcoff::STYP_DWARF) != 0 {
+            SectionKind::Debug
+        } else if section_type & (xcoff::STYP_LOADER | xcoff::STYP_OVRFLO) != 0 {
+            SectionKind::Metadata
+        } else if section_type
+            & (xcoff::STYP_INFO | xcoff::STYP_EXCEPT | xcoff::STYP_PAD | xcoff::STYP_TYPCHK)
+            != 0
+        {
+            SectionKind::Other
+        } else {
+            SectionKind::Unknown
+        }
+    }
+
+    fn relocations(&self) -> Self::RelocationIterator {
+        let rel = self.section.relocations(self.file.data).unwrap_or(&[]);
+        XcoffRelocationIterator {
+            file: self.file,
+            relocations: rel.iter(),
+        }
+    }
+
+    fn flags(&self) -> SectionFlags {
+        SectionFlags::Xcoff {
+            s_flags: self.section.s_flags(),
+        }
+    }
+
+    fn uncompressed_data(&self) -> Result<alloc::borrow::Cow<'data, [u8]>> {
+        self.compressed_data()?.decompress()
+    }
+}
+
+/// The table of section headers in an XCOFF file.
+#[derive(Debug, Clone, Copy)]
+pub struct SectionTable<'data, Xcoff: FileHeader> {
+    sections: &'data [Xcoff::SectionHeader],
+}
+
+impl<'data, Xcoff> Default for SectionTable<'data, Xcoff>
+where
+    Xcoff: FileHeader,
+{
+    fn default() -> Self {
+        Self { sections: &[] }
+    }
+}
+
+impl<'data, Xcoff> SectionTable<'data, Xcoff>
+where
+    Xcoff: FileHeader,
+{
+    /// Parse the section table.
+    ///
+    /// `data` must be the entire file data.
+    /// `offset` must be after the optional file header.
+    pub fn parse<R: ReadRef<'data>>(header: &Xcoff, data: R, offset: &mut u64) -> Result<Self> {
+        let section_num = header.f_nscns();
+        if section_num == 0 {
+            return Ok(SectionTable::default());
+        }
+        let sections = data
+            .read_slice(offset, section_num as usize)
+            .read_error("Invalid XCOFF section headers")?;
+        Ok(SectionTable { sections })
+    }
+
+    /// Iterate over the section headers.
+    #[inline]
+    pub fn iter(&self) -> slice::Iter<'data, Xcoff::SectionHeader> {
+        self.sections.iter()
+    }
+
+    /// Return true if the section table is empty.
+    #[inline]
+    pub fn is_empty(&self) -> bool {
+        self.sections.is_empty()
+    }
+
+    /// The number of section headers.
+    #[inline]
+    pub fn len(&self) -> usize {
+        self.sections.len()
+    }
+
+    /// Return the section header at the given index.
+    pub fn section(&self, index: SectionIndex) -> read::Result<&'data Xcoff::SectionHeader> {
+        self.sections
+            .get(index.0)
+            .read_error("Invalid XCOFF section index")
+    }
+}
+
+/// A trait for generic access to `SectionHeader32` and `SectionHeader64`.
+#[allow(missing_docs)]
+pub trait SectionHeader: Debug + Pod {
+    type Word: Into<u64>;
+    type HalfWord: Into<u32>;
+    type Xcoff: FileHeader<SectionHeader = Self, Word = Self::Word>;
+    type Rel: Rel<Word = Self::Word>;
+
+    fn s_name(&self) -> &[u8; 8];
+    fn s_paddr(&self) -> Self::Word;
+    fn s_vaddr(&self) -> Self::Word;
+    fn s_size(&self) -> Self::Word;
+    fn s_scnptr(&self) -> Self::Word;
+    fn s_relptr(&self) -> Self::Word;
+    fn s_lnnoptr(&self) -> Self::Word;
+    fn s_nreloc(&self) -> Self::HalfWord;
+    fn s_nlnno(&self) -> Self::HalfWord;
+    fn s_flags(&self) -> u32;
+
+    /// Return the section name.
+    fn name(&self) -> &[u8] {
+        let sectname = &self.s_name()[..];
+        match memchr::memchr(b'\0', sectname) {
+            Some(end) => &sectname[..end],
+            None => sectname,
+        }
+    }
+
+    /// Return the offset and size of the section in the file.
+    fn file_range(&self) -> Option<(u64, u64)> {
+        Some((self.s_scnptr().into(), self.s_size().into()))
+    }
+
+    /// Return the section data.
+    ///
+    /// Returns `Ok(&[])` if the section has no data.
+    /// Returns `Err` for invalid values.
+    fn data<'data, R: ReadRef<'data>>(&self, data: R) -> result::Result<&'data [u8], ()> {
+        if let Some((offset, size)) = self.file_range() {
+            data.read_bytes_at(offset, size)
+        } else {
+            Ok(&[])
+        }
+    }
+
+    /// Read the relocations.
+    fn relocations<'data, R: ReadRef<'data>>(&self, data: R) -> read::Result<&'data [Self::Rel]>;
+}
+
+impl SectionHeader for xcoff::SectionHeader32 {
+    type Word = u32;
+    type HalfWord = u16;
+    type Xcoff = xcoff::FileHeader32;
+    type Rel = xcoff::Rel32;
+
+    fn s_name(&self) -> &[u8; 8] {
+        &self.s_name
+    }
+
+    fn s_paddr(&self) -> Self::Word {
+        self.s_paddr.get(BE)
+    }
+
+    fn s_vaddr(&self) -> Self::Word {
+        self.s_vaddr.get(BE)
+    }
+
+    fn s_size(&self) -> Self::Word {
+        self.s_size.get(BE)
+    }
+
+    fn s_scnptr(&self) -> Self::Word {
+        self.s_scnptr.get(BE)
+    }
+
+    fn s_relptr(&self) -> Self::Word {
+        self.s_relptr.get(BE)
+    }
+
+    fn s_lnnoptr(&self) -> Self::Word {
+        self.s_lnnoptr.get(BE)
+    }
+
+    fn s_nreloc(&self) -> Self::HalfWord {
+        self.s_nreloc.get(BE)
+    }
+
+    fn s_nlnno(&self) -> Self::HalfWord {
+        self.s_nlnno.get(BE)
+    }
+
+    fn s_flags(&self) -> u32 {
+        self.s_flags.get(BE)
+    }
+
+    /// Read the relocations in a XCOFF32 file.
+    ///
+    /// `data` must be the entire file data.
+    fn relocations<'data, R: ReadRef<'data>>(&self, data: R) -> read::Result<&'data [Self::Rel]> {
+        let reloc_num = self.s_nreloc() as usize;
+        // TODO: If more than 65,534 relocation entries are required, the field value will be 65535,
+        // and an STYP_OVRFLO section header will contain the actual count of relocation entries in
+        // the s_paddr field.
+        if reloc_num == 65535 {
+            return Err(Error("Overflow section is not supported yet."));
+        }
+        data.read_slice_at(self.s_relptr().into(), reloc_num)
+            .read_error("Invalid XCOFF relocation offset or number")
+    }
+}
+
+impl SectionHeader for xcoff::SectionHeader64 {
+    type Word = u64;
+    type HalfWord = u32;
+    type Xcoff = xcoff::FileHeader64;
+    type Rel = xcoff::Rel64;
+
+    fn s_name(&self) -> &[u8; 8] {
+        &self.s_name
+    }
+
+    fn s_paddr(&self) -> Self::Word {
+        self.s_paddr.get(BE)
+    }
+
+    fn s_vaddr(&self) -> Self::Word {
+        self.s_vaddr.get(BE)
+    }
+
+    fn s_size(&self) -> Self::Word {
+        self.s_size.get(BE)
+    }
+
+    fn s_scnptr(&self) -> Self::Word {
+        self.s_scnptr.get(BE)
+    }
+
+    fn s_relptr(&self) -> Self::Word {
+        self.s_relptr.get(BE)
+    }
+
+    fn s_lnnoptr(&self) -> Self::Word {
+        self.s_lnnoptr.get(BE)
+    }
+
+    fn s_nreloc(&self) -> Self::HalfWord {
+        self.s_nreloc.get(BE)
+    }
+
+    fn s_nlnno(&self) -> Self::HalfWord {
+        self.s_nlnno.get(BE)
+    }
+
+    fn s_flags(&self) -> u32 {
+        self.s_flags.get(BE)
+    }
+
+    /// Read the relocations in a XCOFF64 file.
+    ///
+    /// `data` must be the entire file data.
+    fn relocations<'data, R: ReadRef<'data>>(&self, data: R) -> read::Result<&'data [Self::Rel]> {
+        data.read_slice_at(self.s_relptr(), self.s_nreloc() as usize)
+            .read_error("Invalid XCOFF relocation offset or number")
+    }
+}
diff --git a/third_party/rust/object/src/read/xcoff/segment.rs b/third_party/rust/object/src/read/xcoff/segment.rs
new file mode 100644
index 0000000000..49969438de
--- /dev/null
+++ b/third_party/rust/object/src/read/xcoff/segment.rs
@@ -0,0 +1,115 @@
+//! TODO: Support the segment for XCOFF when auxiliary file header and loader section is ready.
+
+use core::fmt::Debug;
+use core::str;
+
+use crate::read::{self, ObjectSegment, ReadRef, Result};
+use crate::xcoff;
+
+use super::{FileHeader, XcoffFile};
+
+/// An iterator over the segments of an `XcoffFile32`.
+pub type XcoffSegmentIterator32<'data, 'file, R = &'data [u8]> =
+    XcoffSegmentIterator<'data, 'file, xcoff::FileHeader32, R>;
+/// An iterator over the segments of an `XcoffFile64`.
+pub type XcoffSegmentIterator64<'data, 'file, R = &'data [u8]> =
+    XcoffSegmentIterator<'data, 'file, xcoff::FileHeader64, R>;
+
+/// An iterator over the segments of an `XcoffFile`.
+#[derive(Debug)]
+pub struct XcoffSegmentIterator<'data, 'file, Xcoff, R = &'data [u8]>
+where
+    'data: 'file,
+    Xcoff: FileHeader,
+    R: ReadRef<'data>,
+{
+    #[allow(unused)]
+    pub(super) file: &'file XcoffFile<'data, Xcoff, R>,
+}
+
+impl<'data, 'file, Xcoff, R> Iterator for XcoffSegmentIterator<'data, 'file, Xcoff, R>
+where
+    Xcoff: FileHeader,
+    R: ReadRef<'data>,
+{
+    type Item = XcoffSegment<'data, 'file, Xcoff, R>;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        None
+    }
+}
+
+/// A segment of an `XcoffFile32`.
+pub type XcoffSegment32<'data, 'file, R = &'data [u8]> =
+    XcoffSegment<'data, 'file, xcoff::FileHeader32, R>;
+/// A segment of an `XcoffFile64`.
+pub type XcoffSegment64<'data, 'file, R = &'data [u8]> =
+    XcoffSegment<'data, 'file, xcoff::FileHeader64, R>;
+
+/// A loadable section of an `XcoffFile`.
+#[derive(Debug)]
+pub struct XcoffSegment<'data, 'file, Xcoff, R = &'data [u8]>
+where
+    'data: 'file,
+    Xcoff: FileHeader,
+    R: ReadRef<'data>,
+{
+    #[allow(unused)]
+    pub(super) file: &'file XcoffFile<'data, Xcoff, R>,
+}
+
+impl<'data, 'file, Xcoff, R> XcoffSegment<'data, 'file, Xcoff, R>
+where
+    Xcoff: FileHeader,
+    R: ReadRef<'data>,
+{
+}
+
+impl<'data, 'file, Xcoff, R> read::private::Sealed for XcoffSegment<'data, 'file, Xcoff, R>
+where
+    Xcoff: FileHeader,
+    R: ReadRef<'data>,
+{
+}
+
+impl<'data, 'file, Xcoff, R> ObjectSegment<'data> for XcoffSegment<'data, 'file, Xcoff, R>
+where
+    Xcoff: FileHeader,
+    R: ReadRef<'data>,
+{
+    fn address(&self) -> u64 {
+        unreachable!();
+    }
+
+    fn size(&self) -> u64 {
+        unreachable!();
+    }
+
+    fn align(&self) -> u64 {
+        unreachable!();
+    }
+
+    fn file_range(&self) -> (u64, u64) {
+        unreachable!();
+    }
+
+    fn data(&self) -> Result<&'data [u8]> {
+        unreachable!();
+    }
+
+    fn data_range(&self, _address: u64, _size: u64) -> Result<Option<&'data [u8]>> {
+        unreachable!();
+    }
+
+    fn name_bytes(&self) -> Result<Option<&[u8]>> {
+        unreachable!();
+    }
+
+    fn name(&self) -> Result<Option<&str>> {
+        unreachable!();
+    }
+
+    fn flags(&self) -> crate::SegmentFlags {
+        unreachable!();
+    }
+}
diff --git a/third_party/rust/object/src/read/xcoff/symbol.rs b/third_party/rust/object/src/read/xcoff/symbol.rs
new file mode 100644
index 0000000000..6738ad1714
--- /dev/null
+++ b/third_party/rust/object/src/read/xcoff/symbol.rs
@@ -0,0 +1,634 @@
+use alloc::fmt;
+use core::convert::TryInto;
+use core::fmt::Debug;
+use core::marker::PhantomData;
+use core::str;
+
+use crate::endian::{BigEndian as BE, U32Bytes};
+use crate::pod::Pod;
+use crate::read::util::StringTable;
+use crate::{bytes_of, xcoff, Object, ObjectSection, SectionKind};
+
+use crate::read::{
+    self, Bytes, Error, ObjectSymbol, ObjectSymbolTable, ReadError, ReadRef, Result, SectionIndex,
+    SymbolFlags, SymbolIndex, SymbolKind, SymbolScope, SymbolSection,
+};
+
+use super::{FileHeader, XcoffFile};
+
+/// A table of symbol entries in an XCOFF file.
+///
+/// Also includes the string table used for the symbol names.
+#[derive(Debug)]
+pub struct SymbolTable<'data, Xcoff, R = &'data [u8]>
+where
+    Xcoff: FileHeader,
+    R: ReadRef<'data>,
+{
+    symbols: &'data [xcoff::SymbolBytes],
+    strings: StringTable<'data, R>,
+    header: PhantomData<Xcoff>,
+}
+
+impl<'data, Xcoff, R> Default for SymbolTable<'data, Xcoff, R>
+where
+    Xcoff: FileHeader,
+    R: ReadRef<'data>,
+{
+    fn default() -> Self {
+        Self {
+            symbols: &[],
+            strings: StringTable::default(),
+            header: PhantomData,
+        }
+    }
+}
+
+impl<'data, Xcoff, R> SymbolTable<'data, Xcoff, R>
+where
+    Xcoff: FileHeader,
+    R: ReadRef<'data>,
+{
+    /// Parse the symbol table.
+    pub fn parse(header: Xcoff, data: R) -> Result<Self> {
+        let mut offset = header.f_symptr().into();
+        let (symbols, strings) = if offset != 0 {
+            let symbols = data
+                .read_slice(&mut offset, header.f_nsyms() as usize)
+                .read_error("Invalid XCOFF symbol table offset or size")?;
+
+            // Parse the string table.
+            // Note: don't update data when reading length; the length includes itself.
+            let length = data
+                .read_at::<U32Bytes<_>>(offset)
+                .read_error("Missing XCOFF string table")?
+                .get(BE);
+            let str_end = offset
+                .checked_add(length as u64)
+                .read_error("Invalid XCOFF string table length")?;
+            let strings = StringTable::new(data, offset, str_end);
+
+            (symbols, strings)
+        } else {
+            (&[][..], StringTable::default())
+        };
+
+        Ok(SymbolTable {
+            symbols,
+            strings,
+            header: PhantomData,
+        })
+    }
+
+    /// Return the symbol entry at the given index and offset.
+    pub fn get<T: Pod>(&self, index: usize, offset: usize) -> Result<&'data T> {
+        let entry = index
+            .checked_add(offset)
+            .and_then(|x| self.symbols.get(x))
+            .read_error("Invalid XCOFF symbol index")?;
+        let bytes = bytes_of(entry);
+        Bytes(bytes).read().read_error("Invalid XCOFF symbol data")
+    }
+
+    /// Return the symbol at the given index.
+    pub fn symbol(&self, index: usize) -> Result<&'data Xcoff::Symbol> {
+        self.get::<Xcoff::Symbol>(index, 0)
+    }
+
+    /// Return the file auxiliary symbol.
+    pub fn aux_file(&self, index: usize) -> Result<&'data Xcoff::FileAux> {
+        debug_assert!(self.symbol(index)?.has_aux_file());
+        let aux_file = self.get::<Xcoff::FileAux>(index, 1)?;
+        if let Some(aux_type) = aux_file.x_auxtype() {
+            if aux_type != xcoff::AUX_FILE {
+                return Err(Error("Invalid index for file auxiliary symbol."));
+            }
+        }
+        Ok(aux_file)
+    }
+
+    /// Return the csect auxiliary symbol.
+    pub fn aux_csect(&self, index: usize, offset: usize) -> Result<&'data Xcoff::CsectAux> {
+        debug_assert!(self.symbol(index)?.has_aux_csect());
+        let aux_csect = self.get::<Xcoff::CsectAux>(index, offset)?;
+        if let Some(aux_type) = aux_csect.x_auxtype() {
+            if aux_type != xcoff::AUX_CSECT {
+                return Err(Error("Invalid index/offset for csect auxiliary symbol."));
+            }
+        }
+        Ok(aux_csect)
+    }
+
+    /// Return true if the symbol table is empty.
+    #[inline]
+    pub fn is_empty(&self) -> bool {
+        self.symbols.is_empty()
+    }
+
+    /// The number of symbol table entries.
+    ///
+    /// This includes auxiliary symbol table entries.
+    #[inline]
+    pub fn len(&self) -> usize {
+        self.symbols.len()
+    }
+}
+
+/// A symbol table of an `XcoffFile32`.
+pub type XcoffSymbolTable32<'data, 'file, R = &'data [u8]> =
+    XcoffSymbolTable<'data, 'file, xcoff::FileHeader32, R>;
+/// A symbol table of an `XcoffFile64`.
+pub type XcoffSymbolTable64<'data, 'file, R = &'data [u8]> =
+    XcoffSymbolTable<'data, 'file, xcoff::FileHeader64, R>;
+
+/// A symbol table of an `XcoffFile`.
+#[derive(Debug, Clone, Copy)]
+pub struct XcoffSymbolTable<'data, 'file, Xcoff, R = &'data [u8]>
+where
+    'data: 'file,
+    Xcoff: FileHeader,
+    R: ReadRef<'data>,
+{
+    pub(crate) file: &'file XcoffFile<'data, Xcoff, R>,
+    pub(super) symbols: &'file SymbolTable<'data, Xcoff, R>,
+}
+
+impl<'data, 'file, Xcoff: FileHeader, R: ReadRef<'data>> read::private::Sealed
+    for XcoffSymbolTable<'data, 'file, Xcoff, R>
+{
+}
+
+impl<'data, 'file, Xcoff: FileHeader, R: ReadRef<'data>> ObjectSymbolTable<'data>
+    for XcoffSymbolTable<'data, 'file, Xcoff, R>
+{
+    type Symbol = XcoffSymbol<'data, 'file, Xcoff, R>;
+    type SymbolIterator = XcoffSymbolIterator<'data, 'file, Xcoff, R>;
+
+    fn symbols(&self) -> Self::SymbolIterator {
+        XcoffSymbolIterator {
+            file: self.file,
+            symbols: self.symbols,
+            index: 0,
+        }
+    }
+
+    fn symbol_by_index(&self, index: SymbolIndex) -> read::Result<Self::Symbol> {
+        let symbol = self.symbols.symbol(index.0)?;
+        Ok(XcoffSymbol {
+            file: self.file,
+            symbols: self.symbols,
+            index,
+            symbol,
+        })
+    }
+}
+
+/// An iterator over the symbols of an `XcoffFile32`.
+pub type XcoffSymbolIterator32<'data, 'file, R = &'data [u8]> =
+    XcoffSymbolIterator<'data, 'file, xcoff::FileHeader32, R>;
+/// An iterator over the symbols of an `XcoffFile64`.
+pub type XcoffSymbolIterator64<'data, 'file, R = &'data [u8]> =
+    XcoffSymbolIterator<'data, 'file, xcoff::FileHeader64, R>;
+
+/// An iterator over the symbols of an `XcoffFile`.
+pub struct XcoffSymbolIterator<'data, 'file, Xcoff, R = &'data [u8]>
+where
+    'data: 'file,
+    Xcoff: FileHeader,
+    R: ReadRef<'data>,
+{
+    pub(crate) file: &'file XcoffFile<'data, Xcoff, R>,
+    pub(super) symbols: &'file SymbolTable<'data, Xcoff, R>,
+    pub(super) index: usize,
+}
+
+impl<'data, 'file, Xcoff: FileHeader, R: ReadRef<'data>> fmt::Debug
+    for XcoffSymbolIterator<'data, 'file, Xcoff, R>
+{
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("XcoffSymbolIterator").finish()
+    }
+}
+
+impl<'data, 'file, Xcoff: FileHeader, R: ReadRef<'data>> Iterator
+    for XcoffSymbolIterator<'data, 'file, Xcoff, R>
+{
+    type Item = XcoffSymbol<'data, 'file, Xcoff, R>;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        let index = self.index;
+        let symbol = self.symbols.symbol(index).ok()?;
+        // TODO: skip over the auxiliary symbols for now.
+        self.index += 1 + symbol.n_numaux() as usize;
+        Some(XcoffSymbol {
+            file: self.file,
+            symbols: self.symbols,
+            index: SymbolIndex(index),
+            symbol,
+        })
+    }
+}
+
+/// A symbol of an `XcoffFile32`.
+pub type XcoffSymbol32<'data, 'file, R = &'data [u8]> =
+    XcoffSymbol<'data, 'file, xcoff::FileHeader32, R>;
+/// A symbol of an `XcoffFile64`.
+pub type XcoffSymbol64<'data, 'file, R = &'data [u8]> =
+    XcoffSymbol<'data, 'file, xcoff::FileHeader64, R>;
+
+/// A symbol of an `XcoffFile`.
+#[derive(Debug, Clone, Copy)]
+pub struct XcoffSymbol<'data, 'file, Xcoff, R = &'data [u8]>
+where
+    'data: 'file,
+    Xcoff: FileHeader,
+    R: ReadRef<'data>,
+{
+    pub(crate) file: &'file XcoffFile<'data, Xcoff, R>,
+    pub(super) symbols: &'file SymbolTable<'data, Xcoff, R>,
+    pub(super) index: SymbolIndex,
+    pub(super) symbol: &'data Xcoff::Symbol,
+}
+
+impl<'data, 'file, Xcoff: FileHeader, R: ReadRef<'data>> read::private::Sealed
+    for XcoffSymbol<'data, 'file, Xcoff, R>
+{
+}
+
+impl<'data, 'file, Xcoff: FileHeader, R: ReadRef<'data>> ObjectSymbol<'data>
+    for XcoffSymbol<'data, 'file, Xcoff, R>
+{
+    #[inline]
+    fn index(&self) -> SymbolIndex {
+        self.index
+    }
+
+    fn name_bytes(&self) -> Result<&'data [u8]> {
+        self.symbol.name(self.symbols.strings)
+    }
+
+    fn name(&self) -> Result<&'data str> {
+        let name = self.name_bytes()?;
+        str::from_utf8(name)
+            .ok()
+            .read_error("Non UTF-8 XCOFF symbol name")
+    }
+
+    #[inline]
+    fn address(&self) -> u64 {
+        match self.symbol.n_sclass() {
+            // Relocatable address.
+            xcoff::C_EXT
+            | xcoff::C_WEAKEXT
+            | xcoff::C_HIDEXT
+            | xcoff::C_FCN
+            | xcoff::C_BLOCK
+            | xcoff::C_STAT => self.symbol.n_value().into(),
+            _ => 0,
+        }
+    }
+
+    #[inline]
+    fn size(&self) -> u64 {
+        if self.symbol.has_aux_csect() {
+            // XCOFF32 must have the csect auxiliary entry as the last auxiliary entry.
+            // XCOFF64 doesn't require this, but conventionally does.
+            if let Ok(aux_csect) = self
+                .file
+                .symbols
+                .aux_csect(self.index.0, self.symbol.n_numaux() as usize)
+            {
+                let sym_type = aux_csect.sym_type() & 0x07;
+                if sym_type == xcoff::XTY_SD || sym_type == xcoff::XTY_CM {
+                    aux_csect.x_scnlen()
+                } else {
+                    0
+                }
+            } else {
+                0
+            }
+        } else {
+            0
+        }
+    }
+
+    fn kind(&self) -> SymbolKind {
+        match self.symbol.n_sclass() {
+            xcoff::C_FILE => SymbolKind::File,
+            xcoff::C_NULL => SymbolKind::Null,
+            _ => self
+                .file
+                .section_by_index(SectionIndex((self.symbol.n_scnum() - 1) as usize))
+                .map(|section| match section.kind() {
+                    SectionKind::Data | SectionKind::UninitializedData => SymbolKind::Data,
+                    SectionKind::UninitializedTls | SectionKind::Tls => SymbolKind::Tls,
+                    SectionKind::Text => SymbolKind::Text,
+                    _ => SymbolKind::Unknown,
+                })
+                .unwrap_or(SymbolKind::Unknown),
+        }
+    }
+
+    fn section(&self) -> SymbolSection {
+        match self.symbol.n_scnum() {
+            xcoff::N_ABS => SymbolSection::Absolute,
+            xcoff::N_UNDEF => SymbolSection::Undefined,
+            xcoff::N_DEBUG => SymbolSection::None,
+            index if index > 0 => SymbolSection::Section(SectionIndex(index as usize)),
+            _ => SymbolSection::Unknown,
+        }
+    }
+
+    #[inline]
+    fn is_undefined(&self) -> bool {
+        self.symbol.is_undefined()
+    }
+
+    /// Return true if the symbol is a definition of a function or data object.
+    #[inline]
+    fn is_definition(&self) -> bool {
+        if self.symbol.has_aux_csect() {
+            if let Ok(aux_csect) = self
+                .symbols
+                .aux_csect(self.index.0, self.symbol.n_numaux() as usize)
+            {
+                let smclas = aux_csect.x_smclas();
+                self.symbol.n_scnum() != xcoff::N_UNDEF
+                    && (smclas == xcoff::XMC_PR
+                        || smclas == xcoff::XMC_RW
+                        || smclas == xcoff::XMC_RO)
+            } else {
+                false
+            }
+        } else {
+            false
+        }
+    }
+
+    #[inline]
+    fn is_common(&self) -> bool {
+        self.symbol.n_sclass() == xcoff::C_EXT && self.symbol.n_scnum() == xcoff::N_UNDEF
+    }
+
+    #[inline]
+    fn is_weak(&self) -> bool {
+        self.symbol.n_sclass() == xcoff::C_WEAKEXT
+    }
+
+    fn scope(&self) -> SymbolScope {
+        if self.symbol.n_scnum() == xcoff::N_UNDEF {
+            SymbolScope::Unknown
+        } else {
+            match self.symbol.n_sclass() {
+                xcoff::C_EXT | xcoff::C_WEAKEXT | xcoff::C_HIDEXT => {
+                    let visibility = self.symbol.n_type() & xcoff::SYM_V_MASK;
+                    if visibility == xcoff::SYM_V_HIDDEN {
+                        SymbolScope::Linkage
+                    } else {
+                        SymbolScope::Dynamic
+                    }
+                }
+                _ => SymbolScope::Compilation,
+            }
+        }
+    }
+
+    #[inline]
+    fn is_global(&self) -> bool {
+        match self.symbol.n_sclass() {
+            xcoff::C_EXT | xcoff::C_WEAKEXT => true,
+            _ => false,
+        }
+    }
+
+    #[inline]
+    fn is_local(&self) -> bool {
+        !self.is_global()
+    }
+
+    #[inline]
+    fn flags(&self) -> SymbolFlags<SectionIndex> {
+        SymbolFlags::None
+    }
+}
+
+/// A trait for generic access to `Symbol32` and `Symbol64`.
+#[allow(missing_docs)]
+pub trait Symbol: Debug + Pod {
+    type Word: Into<u64>;
+
+    fn n_value(&self) -> Self::Word;
+    fn n_scnum(&self) -> i16;
+    fn n_type(&self) -> u16;
+    fn n_sclass(&self) -> u8;
+    fn n_numaux(&self) -> u8;
+
+    fn name<'data, R: ReadRef<'data>>(
+        &'data self,
+        strings: StringTable<'data, R>,
+    ) -> Result<&'data [u8]>;
+
+    /// Return true if the symbol is undefined.
+    #[inline]
+    fn is_undefined(&self) -> bool {
+        let n_sclass = self.n_sclass();
+        (n_sclass == xcoff::C_EXT || n_sclass == xcoff::C_WEAKEXT)
+            && self.n_scnum() == xcoff::N_UNDEF
+    }
+
+    /// Return true if the symbol has file auxiliary entry.
+    fn has_aux_file(&self) -> bool {
+        self.n_numaux() > 0 && self.n_sclass() == xcoff::C_FILE
+    }
+
+    /// Return true if the symbol has csect auxiliary entry.
+    ///
+    /// A csect auxiliary entry is required for each symbol table entry that has
+    /// a storage class value of C_EXT, C_WEAKEXT, or C_HIDEXT.
+    fn has_aux_csect(&self) -> bool {
+        let sclass = self.n_sclass();
+        self.n_numaux() > 0
+            && (sclass == xcoff::C_EXT || sclass == xcoff::C_WEAKEXT || sclass == xcoff::C_HIDEXT)
+    }
+}
+
+impl Symbol for xcoff::Symbol64 {
+    type Word = u64;
+
+    fn n_value(&self) -> Self::Word {
+        self.n_value.get(BE)
+    }
+
+    fn n_scnum(&self) -> i16 {
+        self.n_scnum.get(BE)
+    }
+
+    fn n_type(&self) -> u16 {
+        self.n_type.get(BE)
+    }
+
+    fn n_sclass(&self) -> u8 {
+        self.n_sclass
+    }
+
+    fn n_numaux(&self) -> u8 {
+        self.n_numaux
+    }
+
+    /// Parse the symbol name for XCOFF64.
+    fn name<'data, R: ReadRef<'data>>(
+        &'data self,
+        strings: StringTable<'data, R>,
+    ) -> Result<&'data [u8]> {
+        strings
+            .get(self.n_offset.get(BE))
+            .read_error("Invalid XCOFF symbol name offset")
+    }
+}
+
+impl Symbol for xcoff::Symbol32 {
+    type Word = u32;
+
+    fn n_value(&self) -> Self::Word {
+        self.n_value.get(BE)
+    }
+
+    fn n_scnum(&self) -> i16 {
+        self.n_scnum.get(BE)
+    }
+
+    fn n_type(&self) -> u16 {
+        self.n_type.get(BE)
+    }
+
+    fn n_sclass(&self) -> u8 {
+        self.n_sclass
+    }
+
+    fn n_numaux(&self) -> u8 {
+        self.n_numaux
+    }
+
+    /// Parse the symbol name for XCOFF32.
+    fn name<'data, R: ReadRef<'data>>(
+        &'data self,
+        strings: StringTable<'data, R>,
+    ) -> Result<&'data [u8]> {
+        if self.n_name[0] == 0 {
+            // If the name starts with 0 then the last 4 bytes are a string table offset.
+            let offset = u32::from_be_bytes(self.n_name[4..8].try_into().unwrap());
+            strings
+                .get(offset)
+                .read_error("Invalid XCOFF symbol name offset")
+        } else {
+            // The name is inline and padded with nulls.
+            Ok(match memchr::memchr(b'\0', &self.n_name) {
+                Some(end) => &self.n_name[..end],
+                None => &self.n_name,
+            })
+        }
+    }
+}
+
+/// A trait for generic access to `FileAux32` and `FileAux64`.
+#[allow(missing_docs)]
+pub trait FileAux: Debug + Pod {
+    fn x_fname(&self) -> &[u8; 8];
+    fn x_ftype(&self) -> u8;
+    fn x_auxtype(&self) -> Option<u8>;
+}
+
+impl FileAux for xcoff::FileAux64 {
+    fn x_fname(&self) -> &[u8; 8] {
+        &self.x_fname
+    }
+
+    fn x_ftype(&self) -> u8 {
+        self.x_ftype
+    }
+
+    fn x_auxtype(&self) -> Option<u8> {
+        Some(self.x_auxtype)
+    }
+}
+
+impl FileAux for xcoff::FileAux32 {
+    fn x_fname(&self) -> &[u8; 8] {
+        &self.x_fname
+    }
+
+    fn x_ftype(&self) -> u8 {
+        self.x_ftype
+    }
+
+    fn x_auxtype(&self) -> Option<u8> {
+        None
+    }
+}
+
+/// A trait for generic access to `CsectAux32` and `CsectAux64`.
+#[allow(missing_docs)]
+pub trait CsectAux: Debug + Pod {
+    fn x_scnlen(&self) -> u64;
+    fn x_parmhash(&self) -> u32;
+    fn x_snhash(&self) -> u16;
+    fn x_smtyp(&self) -> u8;
+    fn x_smclas(&self) -> u8;
+    fn x_auxtype(&self) -> Option<u8>;
+
+    fn sym_type(&self) -> u8 {
+        self.x_smtyp() & 0x07
+    }
+}
+
+impl CsectAux for xcoff::CsectAux64 {
+    fn x_scnlen(&self) -> u64 {
+        self.x_scnlen_lo.get(BE) as u64 | ((self.x_scnlen_hi.get(BE) as u64) << 32)
+    }
+
+    fn x_parmhash(&self) -> u32 {
+        self.x_parmhash.get(BE)
+    }
+
+    fn x_snhash(&self) -> u16 {
+        self.x_snhash.get(BE)
+    }
+
+    fn x_smtyp(&self) -> u8 {
+        self.x_smtyp
+    }
+
+    fn x_smclas(&self) -> u8 {
+        self.x_smclas
+    }
+
+    fn x_auxtype(&self) -> Option<u8> {
+        Some(self.x_auxtype)
+    }
+}
+
+impl CsectAux for xcoff::CsectAux32 {
+    fn x_scnlen(&self) -> u64 {
+        self.x_scnlen.get(BE) as u64
+    }
+
+    fn x_parmhash(&self) -> u32 {
+        self.x_parmhash.get(BE)
+    }
+
+    fn x_snhash(&self) -> u16 {
+        self.x_snhash.get(BE)
+    }
+
+    fn x_smtyp(&self) -> u8 {
+        self.x_smtyp
+    }
+
+    fn x_smclas(&self) -> u8 {
+        self.x_smclas
+    }
+
+    fn x_auxtype(&self) -> Option<u8> {
+        None
+    }
+}
diff --git a/third_party/rust/object/src/write/coff.rs b/third_party/rust/object/src/write/coff.rs
new file mode 100644
index 0000000000..e2d036df88
--- /dev/null
+++ b/third_party/rust/object/src/write/coff.rs
@@ -0,0 +1,713 @@
+use alloc::vec::Vec;
+use core::mem;
+
+use crate::endian::{LittleEndian as LE, U16Bytes, U32Bytes, U16, U32};
+use crate::pe as coff;
+use crate::write::string::*;
+use crate::write::util::*;
+use crate::write::*;
+
+#[derive(Default, Clone, Copy)]
+struct SectionOffsets {
+    offset: usize,
+    str_id: Option<StringId>,
+    reloc_offset: usize,
+    selection: u8,
+    associative_section: u16,
+}
+
+#[derive(Default, Clone, Copy)]
+struct SymbolOffsets {
+    index: usize,
+    str_id: Option<StringId>,
+    aux_count: u8,
+}
+
+/// Internal format to use for the `.drectve` section containing linker
+/// directives for symbol exports.
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub enum CoffExportStyle {
+    /// MSVC format supported by link.exe and LLD.
+    Msvc,
+    /// Gnu format supported by GNU LD and LLD.
+    Gnu,
+}
+
+impl<'a> Object<'a> {
+    pub(crate) fn coff_section_info(
+        &self,
+        section: StandardSection,
+    ) -> (&'static [u8], &'static [u8], SectionKind) {
+        match section {
+            StandardSection::Text => (&[], &b".text"[..], SectionKind::Text),
+            StandardSection::Data => (&[], &b".data"[..], SectionKind::Data),
+            StandardSection::ReadOnlyData
+            | StandardSection::ReadOnlyDataWithRel
+            | StandardSection::ReadOnlyString => (&[], &b".rdata"[..], SectionKind::ReadOnlyData),
+            StandardSection::UninitializedData => {
+                (&[], &b".bss"[..], SectionKind::UninitializedData)
+            }
+            // TLS sections are data sections with a special name.
+            StandardSection::Tls => (&[], &b".tls$"[..], SectionKind::Data),
+            StandardSection::UninitializedTls => {
+                // Unsupported section.
+                (&[], &[], SectionKind::UninitializedTls)
+            }
+            StandardSection::TlsVariables => {
+                // Unsupported section.
+                (&[], &[], SectionKind::TlsVariables)
+            }
+            StandardSection::Common => {
+                // Unsupported section.
+                (&[], &[], SectionKind::Common)
+            }
+        }
+    }
+
+    pub(crate) fn coff_subsection_name(&self, section: &[u8], value: &[u8]) -> Vec<u8> {
+        let mut name = section.to_vec();
+        name.push(b'$');
+        name.extend_from_slice(value);
+        name
+    }
+
+    pub(crate) fn coff_fixup_relocation(&mut self, mut relocation: &mut Relocation) -> i64 {
+        if relocation.kind == RelocationKind::GotRelative {
+            // Use a stub symbol for the relocation instead.
+            // This isn't really a GOT, but it's a similar purpose.
+            // TODO: need to handle DLL imports differently?
+            relocation.kind = RelocationKind::Relative;
+            relocation.symbol = self.coff_add_stub_symbol(relocation.symbol);
+        } else if relocation.kind == RelocationKind::PltRelative {
+            // Windows doesn't need a separate relocation type for
+            // references to functions in import libraries.
+            // For convenience, treat this the same as Relative.
+            relocation.kind = RelocationKind::Relative;
+        }
+
+        let constant = match self.architecture {
+            Architecture::I386 | Architecture::Arm | Architecture::Aarch64 => match relocation.kind
+            {
+                RelocationKind::Relative => {
+                    // IMAGE_REL_I386_REL32, IMAGE_REL_ARM_REL32, IMAGE_REL_ARM64_REL32
+                    relocation.addend + 4
+                }
+                _ => relocation.addend,
+            },
+            Architecture::X86_64 => match relocation.kind {
+                RelocationKind::Relative => {
+                    // IMAGE_REL_AMD64_REL32 through to IMAGE_REL_AMD64_REL32_5
+                    if relocation.addend <= -4 && relocation.addend >= -9 {
+                        0
+                    } else {
+                        relocation.addend + 4
+                    }
+                }
+                _ => relocation.addend,
+            },
+            _ => unimplemented!(),
+        };
+        relocation.addend -= constant;
+        constant
+    }
+
+    fn coff_add_stub_symbol(&mut self, symbol_id: SymbolId) -> SymbolId {
+        if let Some(stub_id) = self.stub_symbols.get(&symbol_id) {
+            return *stub_id;
+        }
+        let stub_size = self.architecture.address_size().unwrap().bytes();
+
+        let name = b".rdata$.refptr".to_vec();
+        let section_id = self.add_section(Vec::new(), name, SectionKind::ReadOnlyData);
+        let section = self.section_mut(section_id);
+        section.set_data(vec![0; stub_size as usize], u64::from(stub_size));
+        section.relocations = vec![Relocation {
+            offset: 0,
+            size: stub_size * 8,
+            kind: RelocationKind::Absolute,
+            encoding: RelocationEncoding::Generic,
+            symbol: symbol_id,
+            addend: 0,
+        }];
+
+        let mut name = b".refptr.".to_vec();
+        name.extend_from_slice(&self.symbol(symbol_id).name);
+        let stub_id = self.add_raw_symbol(Symbol {
+            name,
+            value: 0,
+            size: u64::from(stub_size),
+            kind: SymbolKind::Data,
+            scope: SymbolScope::Compilation,
+            weak: false,
+            section: SymbolSection::Section(section_id),
+            flags: SymbolFlags::None,
+        });
+        self.stub_symbols.insert(symbol_id, stub_id);
+
+        stub_id
+    }
+
+    /// Appends linker directives to the `.drectve` section to tell the linker
+    /// to export all symbols with `SymbolScope::Dynamic`.
+    ///
+    /// This must be called after all symbols have been defined.
+    pub fn add_coff_exports(&mut self, style: CoffExportStyle) {
+        assert_eq!(self.format, BinaryFormat::Coff);
+
+        let mut directives = vec![];
+        for symbol in &self.symbols {
+            if symbol.scope == SymbolScope::Dynamic {
+                match style {
+                    CoffExportStyle::Msvc => directives.extend(b" /EXPORT:\""),
+                    CoffExportStyle::Gnu => directives.extend(b" -export:\""),
+                }
+                directives.extend(&symbol.name);
+                directives.extend(b"\"");
+                if symbol.kind != SymbolKind::Text {
+                    match style {
+                        CoffExportStyle::Msvc => directives.extend(b",DATA"),
+                        CoffExportStyle::Gnu => directives.extend(b",data"),
+                    }
+                }
+            }
+        }
+        let drectve = self.add_section(vec![], b".drectve".to_vec(), SectionKind::Linker);
+        self.append_section_data(drectve, &directives, 1);
+    }
+
+    pub(crate) fn coff_write(&self, buffer: &mut dyn WritableBuffer) -> Result<()> {
+        // Calculate offsets of everything, and build strtab.
+        let mut offset = 0;
+        let mut strtab = StringTable::default();
+
+        // COFF header.
+        offset += mem::size_of::<coff::ImageFileHeader>();
+
+        // Section headers.
+        offset += self.sections.len() * mem::size_of::<coff::ImageSectionHeader>();
+
+        // Calculate size of section data and add section strings to strtab.
+        let mut section_offsets = vec![SectionOffsets::default(); self.sections.len()];
+        for (index, section) in self.sections.iter().enumerate() {
+            if section.name.len() > 8 {
+                section_offsets[index].str_id = Some(strtab.add(&section.name));
+            }
+
+            let len = section.data.len();
+            if len != 0 {
+                // TODO: not sure what alignment is required here, but this seems to match LLVM
+                offset = align(offset, 4);
+                section_offsets[index].offset = offset;
+                offset += len;
+            } else {
+                section_offsets[index].offset = 0;
+            }
+
+            // Calculate size of relocations.
+            let mut count = section.relocations.len();
+            if count != 0 {
+                section_offsets[index].reloc_offset = offset;
+                if count > 0xffff {
+                    count += 1;
+                }
+                offset += count * mem::size_of::<coff::ImageRelocation>();
+            }
+        }
+
+        // Set COMDAT flags.
+        for comdat in &self.comdats {
+            let symbol = &self.symbols[comdat.symbol.0];
+            let comdat_section = match symbol.section {
+                SymbolSection::Section(id) => id.0,
+                _ => {
+                    return Err(Error(format!(
+                        "unsupported COMDAT symbol `{}` section {:?}",
+                        symbol.name().unwrap_or(""),
+                        symbol.section
+                    )));
+                }
+            };
+            section_offsets[comdat_section].selection = match comdat.kind {
+                ComdatKind::NoDuplicates => coff::IMAGE_COMDAT_SELECT_NODUPLICATES,
+                ComdatKind::Any => coff::IMAGE_COMDAT_SELECT_ANY,
+                ComdatKind::SameSize => coff::IMAGE_COMDAT_SELECT_SAME_SIZE,
+                ComdatKind::ExactMatch => coff::IMAGE_COMDAT_SELECT_EXACT_MATCH,
+                ComdatKind::Largest => coff::IMAGE_COMDAT_SELECT_LARGEST,
+                ComdatKind::Newest => coff::IMAGE_COMDAT_SELECT_NEWEST,
+                ComdatKind::Unknown => {
+                    return Err(Error(format!(
+                        "unsupported COMDAT symbol `{}` kind {:?}",
+                        symbol.name().unwrap_or(""),
+                        comdat.kind
+                    )));
+                }
+            };
+            for id in &comdat.sections {
+                let section = &self.sections[id.0];
+                if section.symbol.is_none() {
+                    return Err(Error(format!(
+                        "missing symbol for COMDAT section `{}`",
+                        section.name().unwrap_or(""),
+                    )));
+                }
+                if id.0 != comdat_section {
+                    section_offsets[id.0].selection = coff::IMAGE_COMDAT_SELECT_ASSOCIATIVE;
+                    section_offsets[id.0].associative_section = comdat_section as u16 + 1;
+                }
+            }
+        }
+
+        // Calculate size of symbols and add symbol strings to strtab.
+        let mut symbol_offsets = vec![SymbolOffsets::default(); self.symbols.len()];
+        let mut symtab_count = 0;
+        for (index, symbol) in self.symbols.iter().enumerate() {
+            symbol_offsets[index].index = symtab_count;
+            symtab_count += 1;
+            match symbol.kind {
+                SymbolKind::File => {
+                    // Name goes in auxilary symbol records.
+                    let aux_count = (symbol.name.len() + coff::IMAGE_SIZEOF_SYMBOL - 1)
+                        / coff::IMAGE_SIZEOF_SYMBOL;
+                    symbol_offsets[index].aux_count = aux_count as u8;
+                    symtab_count += aux_count;
+                    // Don't add name to strtab.
+                    continue;
+                }
+                SymbolKind::Section => {
+                    symbol_offsets[index].aux_count = 1;
+                    symtab_count += 1;
+                }
+                _ => {}
+            }
+            if symbol.name.len() > 8 {
+                symbol_offsets[index].str_id = Some(strtab.add(&symbol.name));
+            }
+        }
+
+        // Calculate size of symtab.
+        let symtab_offset = offset;
+        let symtab_len = symtab_count * coff::IMAGE_SIZEOF_SYMBOL;
+        offset += symtab_len;
+
+        // Calculate size of strtab.
+        let strtab_offset = offset;
+        let mut strtab_data = Vec::new();
+        // First 4 bytes of strtab are the length.
+        strtab.write(4, &mut strtab_data);
+        let strtab_len = strtab_data.len() + 4;
+        offset += strtab_len;
+
+        // Start writing.
+        buffer
+            .reserve(offset)
+            .map_err(|_| Error(String::from("Cannot allocate buffer")))?;
+
+        // Write file header.
+        let header = coff::ImageFileHeader {
+            machine: U16::new(
+                LE,
+                match self.architecture {
+                    Architecture::Arm => coff::IMAGE_FILE_MACHINE_ARMNT,
+                    Architecture::Aarch64 => coff::IMAGE_FILE_MACHINE_ARM64,
+                    Architecture::I386 => coff::IMAGE_FILE_MACHINE_I386,
+                    Architecture::X86_64 => coff::IMAGE_FILE_MACHINE_AMD64,
+                    _ => {
+                        return Err(Error(format!(
+                            "unimplemented architecture {:?}",
+                            self.architecture
+                        )));
+                    }
+                },
+            ),
+            number_of_sections: U16::new(LE, self.sections.len() as u16),
+            time_date_stamp: U32::default(),
+            pointer_to_symbol_table: U32::new(LE, symtab_offset as u32),
+            number_of_symbols: U32::new(LE, symtab_count as u32),
+            size_of_optional_header: U16::default(),
+            characteristics: match self.flags {
+                FileFlags::Coff { characteristics } => U16::new(LE, characteristics),
+                _ => U16::default(),
+            },
+        };
+        buffer.write(&header);
+
+        // Write section headers.
+        for (index, section) in self.sections.iter().enumerate() {
+            let mut characteristics = if let SectionFlags::Coff {
+                characteristics, ..
+            } = section.flags
+            {
+                characteristics
+            } else {
+                match section.kind {
+                    SectionKind::Text => {
+                        coff::IMAGE_SCN_CNT_CODE
+                            | coff::IMAGE_SCN_MEM_EXECUTE
+                            | coff::IMAGE_SCN_MEM_READ
+                    }
+                    SectionKind::Data => {
+                        coff::IMAGE_SCN_CNT_INITIALIZED_DATA
+                            | coff::IMAGE_SCN_MEM_READ
+                            | coff::IMAGE_SCN_MEM_WRITE
+                    }
+                    SectionKind::UninitializedData => {
+                        coff::IMAGE_SCN_CNT_UNINITIALIZED_DATA
+                            | coff::IMAGE_SCN_MEM_READ
+                            | coff::IMAGE_SCN_MEM_WRITE
+                    }
+                    SectionKind::ReadOnlyData
+                    | SectionKind::ReadOnlyDataWithRel
+                    | SectionKind::ReadOnlyString => {
+                        coff::IMAGE_SCN_CNT_INITIALIZED_DATA | coff::IMAGE_SCN_MEM_READ
+                    }
+                    SectionKind::Debug | SectionKind::Other | SectionKind::OtherString => {
+                        coff::IMAGE_SCN_CNT_INITIALIZED_DATA
+                            | coff::IMAGE_SCN_MEM_READ
+                            | coff::IMAGE_SCN_MEM_DISCARDABLE
+                    }
+                    SectionKind::Linker => coff::IMAGE_SCN_LNK_INFO | coff::IMAGE_SCN_LNK_REMOVE,
+                    SectionKind::Common
+                    | SectionKind::Tls
+                    | SectionKind::UninitializedTls
+                    | SectionKind::TlsVariables
+                    | SectionKind::Note
+                    | SectionKind::Unknown
+                    | SectionKind::Metadata
+                    | SectionKind::Elf(_) => {
+                        return Err(Error(format!(
+                            "unimplemented section `{}` kind {:?}",
+                            section.name().unwrap_or(""),
+                            section.kind
+                        )));
+                    }
+                }
+            };
+            if section_offsets[index].selection != 0 {
+                characteristics |= coff::IMAGE_SCN_LNK_COMDAT;
+            };
+            if section.relocations.len() > 0xffff {
+                characteristics |= coff::IMAGE_SCN_LNK_NRELOC_OVFL;
+            }
+            characteristics |= match section.align {
+                1 => coff::IMAGE_SCN_ALIGN_1BYTES,
+                2 => coff::IMAGE_SCN_ALIGN_2BYTES,
+                4 => coff::IMAGE_SCN_ALIGN_4BYTES,
+                8 => coff::IMAGE_SCN_ALIGN_8BYTES,
+                16 => coff::IMAGE_SCN_ALIGN_16BYTES,
+                32 => coff::IMAGE_SCN_ALIGN_32BYTES,
+                64 => coff::IMAGE_SCN_ALIGN_64BYTES,
+                128 => coff::IMAGE_SCN_ALIGN_128BYTES,
+                256 => coff::IMAGE_SCN_ALIGN_256BYTES,
+                512 => coff::IMAGE_SCN_ALIGN_512BYTES,
+                1024 => coff::IMAGE_SCN_ALIGN_1024BYTES,
+                2048 => coff::IMAGE_SCN_ALIGN_2048BYTES,
+                4096 => coff::IMAGE_SCN_ALIGN_4096BYTES,
+                8192 => coff::IMAGE_SCN_ALIGN_8192BYTES,
+                _ => {
+                    return Err(Error(format!(
+                        "unimplemented section `{}` align {}",
+                        section.name().unwrap_or(""),
+                        section.align
+                    )));
+                }
+            };
+            let mut coff_section = coff::ImageSectionHeader {
+                name: [0; 8],
+                virtual_size: U32::default(),
+                virtual_address: U32::default(),
+                size_of_raw_data: U32::new(LE, section.size as u32),
+                pointer_to_raw_data: U32::new(LE, section_offsets[index].offset as u32),
+                pointer_to_relocations: U32::new(LE, section_offsets[index].reloc_offset as u32),
+                pointer_to_linenumbers: U32::default(),
+                number_of_relocations: if section.relocations.len() > 0xffff {
+                    U16::new(LE, 0xffff)
+                } else {
+                    U16::new(LE, section.relocations.len() as u16)
+                },
+                number_of_linenumbers: U16::default(),
+                characteristics: U32::new(LE, characteristics),
+            };
+            if section.name.len() <= 8 {
+                coff_section.name[..section.name.len()].copy_from_slice(&section.name);
+            } else {
+                let mut str_offset = strtab.get_offset(section_offsets[index].str_id.unwrap());
+                if str_offset <= 9_999_999 {
+                    let mut name = [0; 7];
+                    let mut len = 0;
+                    if str_offset == 0 {
+                        name[6] = b'0';
+                        len = 1;
+                    } else {
+                        while str_offset != 0 {
+                            let rem = (str_offset % 10) as u8;
+                            str_offset /= 10;
+                            name[6 - len] = b'0' + rem;
+                            len += 1;
+                        }
+                    }
+                    coff_section.name = [0; 8];
+                    coff_section.name[0] = b'/';
+                    coff_section.name[1..][..len].copy_from_slice(&name[7 - len..]);
+                } else if str_offset as u64 <= 0xf_ffff_ffff {
+                    coff_section.name[0] = b'/';
+                    coff_section.name[1] = b'/';
+                    for i in 0..6 {
+                        let rem = (str_offset % 64) as u8;
+                        str_offset /= 64;
+                        let c = match rem {
+                            0..=25 => b'A' + rem,
+                            26..=51 => b'a' + rem - 26,
+                            52..=61 => b'0' + rem - 52,
+                            62 => b'+',
+                            63 => b'/',
+                            _ => unreachable!(),
+                        };
+                        coff_section.name[7 - i] = c;
+                    }
+                } else {
+                    return Err(Error(format!("invalid section name offset {}", str_offset)));
+                }
+            }
+            buffer.write(&coff_section);
+        }
+
+        // Write section data and relocations.
+        for (index, section) in self.sections.iter().enumerate() {
+            let len = section.data.len();
+            if len != 0 {
+                write_align(buffer, 4);
+                debug_assert_eq!(section_offsets[index].offset, buffer.len());
+                buffer.write_bytes(&section.data);
+            }
+
+            if !section.relocations.is_empty() {
+                debug_assert_eq!(section_offsets[index].reloc_offset, buffer.len());
+                if section.relocations.len() > 0xffff {
+                    let coff_relocation = coff::ImageRelocation {
+                        virtual_address: U32Bytes::new(LE, section.relocations.len() as u32 + 1),
+                        symbol_table_index: U32Bytes::new(LE, 0),
+                        typ: U16Bytes::new(LE, 0),
+                    };
+                    buffer.write(&coff_relocation);
+                }
+                for reloc in &section.relocations {
+                    //assert!(reloc.implicit_addend);
+                    let typ = match self.architecture {
+                        Architecture::I386 => match (reloc.kind, reloc.size, reloc.addend) {
+                            (RelocationKind::Absolute, 16, 0) => coff::IMAGE_REL_I386_DIR16,
+                            (RelocationKind::Relative, 16, 0) => coff::IMAGE_REL_I386_REL16,
+                            (RelocationKind::Absolute, 32, 0) => coff::IMAGE_REL_I386_DIR32,
+                            (RelocationKind::ImageOffset, 32, 0) => coff::IMAGE_REL_I386_DIR32NB,
+                            (RelocationKind::SectionIndex, 16, 0) => coff::IMAGE_REL_I386_SECTION,
+                            (RelocationKind::SectionOffset, 32, 0) => coff::IMAGE_REL_I386_SECREL,
+                            (RelocationKind::SectionOffset, 7, 0) => coff::IMAGE_REL_I386_SECREL7,
+                            (RelocationKind::Relative, 32, -4) => coff::IMAGE_REL_I386_REL32,
+                            (RelocationKind::Coff(x), _, _) => x,
+                            _ => {
+                                return Err(Error(format!("unimplemented relocation {:?}", reloc)));
+                            }
+                        },
+                        Architecture::X86_64 => match (reloc.kind, reloc.size, reloc.addend) {
+                            (RelocationKind::Absolute, 64, 0) => coff::IMAGE_REL_AMD64_ADDR64,
+                            (RelocationKind::Absolute, 32, 0) => coff::IMAGE_REL_AMD64_ADDR32,
+                            (RelocationKind::ImageOffset, 32, 0) => coff::IMAGE_REL_AMD64_ADDR32NB,
+                            (RelocationKind::Relative, 32, -4) => coff::IMAGE_REL_AMD64_REL32,
+                            (RelocationKind::Relative, 32, -5) => coff::IMAGE_REL_AMD64_REL32_1,
+                            (RelocationKind::Relative, 32, -6) => coff::IMAGE_REL_AMD64_REL32_2,
+                            (RelocationKind::Relative, 32, -7) => coff::IMAGE_REL_AMD64_REL32_3,
+                            (RelocationKind::Relative, 32, -8) => coff::IMAGE_REL_AMD64_REL32_4,
+                            (RelocationKind::Relative, 32, -9) => coff::IMAGE_REL_AMD64_REL32_5,
+                            (RelocationKind::SectionIndex, 16, 0) => coff::IMAGE_REL_AMD64_SECTION,
+                            (RelocationKind::SectionOffset, 32, 0) => coff::IMAGE_REL_AMD64_SECREL,
+                            (RelocationKind::SectionOffset, 7, 0) => coff::IMAGE_REL_AMD64_SECREL7,
+                            (RelocationKind::Coff(x), _, _) => x,
+                            _ => {
+                                return Err(Error(format!("unimplemented relocation {:?}", reloc)));
+                            }
+                        },
+                        Architecture::Arm => match (reloc.kind, reloc.size, reloc.addend) {
+                            (RelocationKind::Absolute, 32, 0) => coff::IMAGE_REL_ARM_ADDR32,
+                            (RelocationKind::ImageOffset, 32, 0) => coff::IMAGE_REL_ARM_ADDR32NB,
+                            (RelocationKind::Relative, 32, -4) => coff::IMAGE_REL_ARM_REL32,
+                            (RelocationKind::SectionIndex, 16, 0) => coff::IMAGE_REL_ARM_SECTION,
+                            (RelocationKind::SectionOffset, 32, 0) => coff::IMAGE_REL_ARM_SECREL,
+                            (RelocationKind::Coff(x), _, _) => x,
+                            _ => {
+                                return Err(Error(format!("unimplemented relocation {:?}", reloc)));
+                            }
+                        },
+                        Architecture::Aarch64 => match (reloc.kind, reloc.size, reloc.addend) {
+                            (RelocationKind::Absolute, 32, 0) => coff::IMAGE_REL_ARM64_ADDR32,
+                            (RelocationKind::ImageOffset, 32, 0) => coff::IMAGE_REL_ARM64_ADDR32NB,
+                            (RelocationKind::SectionIndex, 16, 0) => coff::IMAGE_REL_ARM64_SECTION,
+                            (RelocationKind::SectionOffset, 32, 0) => coff::IMAGE_REL_ARM64_SECREL,
+                            (RelocationKind::Absolute, 64, 0) => coff::IMAGE_REL_ARM64_ADDR64,
+                            (RelocationKind::Relative, 32, -4) => coff::IMAGE_REL_ARM64_REL32,
+                            (RelocationKind::Coff(x), _, _) => x,
+                            _ => {
+                                return Err(Error(format!("unimplemented relocation {:?}", reloc)));
+                            }
+                        },
+                        _ => {
+                            return Err(Error(format!(
+                                "unimplemented architecture {:?}",
+                                self.architecture
+                            )));
+                        }
+                    };
+                    let coff_relocation = coff::ImageRelocation {
+                        virtual_address: U32Bytes::new(LE, reloc.offset as u32),
+                        symbol_table_index: U32Bytes::new(
+                            LE,
+                            symbol_offsets[reloc.symbol.0].index as u32,
+                        ),
+                        typ: U16Bytes::new(LE, typ),
+                    };
+                    buffer.write(&coff_relocation);
+                }
+            }
+        }
+
+        // Write symbols.
+        debug_assert_eq!(symtab_offset, buffer.len());
+        for (index, symbol) in self.symbols.iter().enumerate() {
+            let mut name = &symbol.name[..];
+            let section_number = match symbol.section {
+                SymbolSection::None => {
+                    debug_assert_eq!(symbol.kind, SymbolKind::File);
+                    coff::IMAGE_SYM_DEBUG
+                }
+                SymbolSection::Undefined => coff::IMAGE_SYM_UNDEFINED,
+                SymbolSection::Absolute => coff::IMAGE_SYM_ABSOLUTE,
+                SymbolSection::Common => coff::IMAGE_SYM_UNDEFINED,
+                SymbolSection::Section(id) => id.0 as u16 + 1,
+            };
+            let typ = if symbol.kind == SymbolKind::Text {
+                coff::IMAGE_SYM_DTYPE_FUNCTION << coff::IMAGE_SYM_DTYPE_SHIFT
+            } else {
+                coff::IMAGE_SYM_TYPE_NULL
+            };
+            let storage_class = match symbol.kind {
+                SymbolKind::File => {
+                    // Name goes in auxilary symbol records.
+                    name = b".file";
+                    coff::IMAGE_SYM_CLASS_FILE
+                }
+                SymbolKind::Section => coff::IMAGE_SYM_CLASS_STATIC,
+                SymbolKind::Label => coff::IMAGE_SYM_CLASS_LABEL,
+                SymbolKind::Text | SymbolKind::Data | SymbolKind::Tls => {
+                    match symbol.section {
+                        SymbolSection::None => {
+                            return Err(Error(format!(
+                                "missing section for symbol `{}`",
+                                symbol.name().unwrap_or("")
+                            )));
+                        }
+                        SymbolSection::Undefined | SymbolSection::Common => {
+                            coff::IMAGE_SYM_CLASS_EXTERNAL
+                        }
+                        SymbolSection::Absolute | SymbolSection::Section(_) => {
+                            match symbol.scope {
+                                // TODO: does this need aux symbol records too?
+                                _ if symbol.weak => coff::IMAGE_SYM_CLASS_WEAK_EXTERNAL,
+                                SymbolScope::Unknown => {
+                                    return Err(Error(format!(
+                                        "unimplemented symbol `{}` scope {:?}",
+                                        symbol.name().unwrap_or(""),
+                                        symbol.scope
+                                    )));
+                                }
+                                SymbolScope::Compilation => coff::IMAGE_SYM_CLASS_STATIC,
+                                SymbolScope::Linkage | SymbolScope::Dynamic => {
+                                    coff::IMAGE_SYM_CLASS_EXTERNAL
+                                }
+                            }
+                        }
+                    }
+                }
+                SymbolKind::Unknown | SymbolKind::Null => {
+                    return Err(Error(format!(
+                        "unimplemented symbol `{}` kind {:?}",
+                        symbol.name().unwrap_or(""),
+                        symbol.kind
+                    )));
+                }
+            };
+            let number_of_aux_symbols = symbol_offsets[index].aux_count;
+            let value = if symbol.section == SymbolSection::Common {
+                symbol.size as u32
+            } else {
+                symbol.value as u32
+            };
+            let mut coff_symbol = coff::ImageSymbol {
+                name: [0; 8],
+                value: U32Bytes::new(LE, value),
+                section_number: U16Bytes::new(LE, section_number as u16),
+                typ: U16Bytes::new(LE, typ),
+                storage_class,
+                number_of_aux_symbols,
+            };
+            if name.len() <= 8 {
+                coff_symbol.name[..name.len()].copy_from_slice(name);
+            } else {
+                let str_offset = strtab.get_offset(symbol_offsets[index].str_id.unwrap());
+                coff_symbol.name[4..8].copy_from_slice(&u32::to_le_bytes(str_offset as u32));
+            }
+            buffer.write(&coff_symbol);
+
+            // Write auxiliary symbols.
+            match symbol.kind {
+                SymbolKind::File => {
+                    let aux_len = number_of_aux_symbols as usize * coff::IMAGE_SIZEOF_SYMBOL;
+                    debug_assert!(aux_len >= symbol.name.len());
+                    let old_len = buffer.len();
+                    buffer.write_bytes(&symbol.name);
+                    buffer.resize(old_len + aux_len);
+                }
+                SymbolKind::Section => {
+                    debug_assert_eq!(number_of_aux_symbols, 1);
+                    let section_index = symbol.section.id().unwrap().0;
+                    let section = &self.sections[section_index];
+                    let aux = coff::ImageAuxSymbolSection {
+                        length: U32Bytes::new(LE, section.size as u32),
+                        number_of_relocations: if section.relocations.len() > 0xffff {
+                            U16Bytes::new(LE, 0xffff)
+                        } else {
+                            U16Bytes::new(LE, section.relocations.len() as u16)
+                        },
+                        number_of_linenumbers: U16Bytes::default(),
+                        check_sum: U32Bytes::new(LE, checksum(section.data())),
+                        number: U16Bytes::new(
+                            LE,
+                            section_offsets[section_index].associative_section,
+                        ),
+                        selection: section_offsets[section_index].selection,
+                        reserved: 0,
+                        // TODO: bigobj
+                        high_number: U16Bytes::default(),
+                    };
+                    buffer.write(&aux);
+                }
+                _ => {
+                    debug_assert_eq!(number_of_aux_symbols, 0);
+                }
+            }
+        }
+
+        // Write strtab section.
+        debug_assert_eq!(strtab_offset, buffer.len());
+        buffer.write_bytes(&u32::to_le_bytes(strtab_len as u32));
+        buffer.write_bytes(&strtab_data);
+
+        debug_assert_eq!(offset, buffer.len());
+
+        Ok(())
+    }
+}
+
+// JamCRC
+fn checksum(data: &[u8]) -> u32 {
+    let mut hasher = crc32fast::Hasher::new_with_initial(0xffff_ffff);
+    hasher.update(data);
+    !hasher.finalize()
+}
diff --git a/third_party/rust/object/src/write/elf/mod.rs b/third_party/rust/object/src/write/elf/mod.rs
new file mode 100644
index 0000000000..3a4f3716e8
--- /dev/null
+++ b/third_party/rust/object/src/write/elf/mod.rs
@@ -0,0 +1,9 @@
+//! Support for writing ELF files.
+//!
+//! Provides [`Writer`] for low level writing of ELF files.
+//! This is also used to provide ELF support for [`write::Object`](crate::write::Object).
+
+mod object;
+
+mod writer;
+pub use writer::*;
diff --git a/third_party/rust/object/src/write/elf/object.rs b/third_party/rust/object/src/write/elf/object.rs
new file mode 100644
index 0000000000..305d522e66
--- /dev/null
+++ b/third_party/rust/object/src/write/elf/object.rs
@@ -0,0 +1,838 @@
+use alloc::vec::Vec;
+
+use crate::elf;
+use crate::write::elf::writer::*;
+use crate::write::string::StringId;
+use crate::write::*;
+use crate::AddressSize;
+
+#[derive(Clone, Copy)]
+struct ComdatOffsets {
+    offset: usize,
+    str_id: StringId,
+}
+
+#[derive(Clone, Copy)]
+struct SectionOffsets {
+    index: SectionIndex,
+    offset: usize,
+    str_id: StringId,
+    reloc_offset: usize,
+    reloc_str_id: Option<StringId>,
+}
+
+#[derive(Default, Clone, Copy)]
+struct SymbolOffsets {
+    index: SymbolIndex,
+    str_id: Option<StringId>,
+}
+
+impl<'a> Object<'a> {
+    pub(crate) fn elf_section_info(
+        &self,
+        section: StandardSection,
+    ) -> (&'static [u8], &'static [u8], SectionKind) {
+        match section {
+            StandardSection::Text => (&[], &b".text"[..], SectionKind::Text),
+            StandardSection::Data => (&[], &b".data"[..], SectionKind::Data),
+            StandardSection::ReadOnlyData | StandardSection::ReadOnlyString => {
+                (&[], &b".rodata"[..], SectionKind::ReadOnlyData)
+            }
+            StandardSection::ReadOnlyDataWithRel => {
+                (&[], b".data.rel.ro", SectionKind::ReadOnlyDataWithRel)
+            }
+            StandardSection::UninitializedData => {
+                (&[], &b".bss"[..], SectionKind::UninitializedData)
+            }
+            StandardSection::Tls => (&[], &b".tdata"[..], SectionKind::Tls),
+            StandardSection::UninitializedTls => {
+                (&[], &b".tbss"[..], SectionKind::UninitializedTls)
+            }
+            StandardSection::TlsVariables => {
+                // Unsupported section.
+                (&[], &[], SectionKind::TlsVariables)
+            }
+            StandardSection::Common => {
+                // Unsupported section.
+                (&[], &[], SectionKind::Common)
+            }
+        }
+    }
+
+    pub(crate) fn elf_subsection_name(&self, section: &[u8], value: &[u8]) -> Vec<u8> {
+        let mut name = section.to_vec();
+        name.push(b'.');
+        name.extend_from_slice(value);
+        name
+    }
+
+    fn elf_has_relocation_addend(&self) -> Result<bool> {
+        Ok(match self.architecture {
+            Architecture::Aarch64 => true,
+            Architecture::Aarch64_Ilp32 => true,
+            Architecture::Arm => false,
+            Architecture::Avr => true,
+            Architecture::Bpf => false,
+            Architecture::I386 => false,
+            Architecture::X86_64 => true,
+            Architecture::X86_64_X32 => true,
+            Architecture::Hexagon => true,
+            Architecture::LoongArch64 => true,
+            Architecture::Mips => false,
+            Architecture::Mips64 => true,
+            Architecture::Msp430 => true,
+            Architecture::PowerPc => true,
+            Architecture::PowerPc64 => true,
+            Architecture::Riscv64 => true,
+            Architecture::Riscv32 => true,
+            Architecture::S390x => true,
+            Architecture::Sbf => false,
+            Architecture::Sparc64 => true,
+            Architecture::Xtensa => true,
+            _ => {
+                return Err(Error(format!(
+                    "unimplemented architecture {:?}",
+                    self.architecture
+                )));
+            }
+        })
+    }
+
+    pub(crate) fn elf_fixup_relocation(&mut self, mut relocation: &mut Relocation) -> Result<i64> {
+        // Return true if we should use a section symbol to avoid preemption.
+        fn want_section_symbol(relocation: &Relocation, symbol: &Symbol) -> bool {
+            if symbol.scope != SymbolScope::Dynamic {
+                // Only dynamic symbols can be preemptible.
+                return false;
+            }
+            match symbol.kind {
+                SymbolKind::Text | SymbolKind::Data => {}
+                _ => return false,
+            }
+            match relocation.kind {
+                // Anything using GOT or PLT is preemptible.
+                // We also require that `Other` relocations must already be correct.
+                RelocationKind::Got
+                | RelocationKind::GotRelative
+                | RelocationKind::GotBaseRelative
+                | RelocationKind::PltRelative
+                | RelocationKind::Elf(_) => return false,
+                // Absolute relocations are preemptible for non-local data.
+                // TODO: not sure if this rule is exactly correct
+                // This rule was added to handle global data references in debuginfo.
+                // Maybe this should be a new relocation kind so that the caller can decide.
+                RelocationKind::Absolute => {
+                    if symbol.kind == SymbolKind::Data {
+                        return false;
+                    }
+                }
+                _ => {}
+            }
+            true
+        }
+
+        // Use section symbols for relocations where required to avoid preemption.
+        // Otherwise, the linker will fail with:
+        //     relocation R_X86_64_PC32 against symbol `SomeSymbolName' can not be used when
+        //     making a shared object; recompile with -fPIC
+        let symbol = &self.symbols[relocation.symbol.0];
+        if want_section_symbol(relocation, symbol) {
+            if let Some(section) = symbol.section.id() {
+                relocation.addend += symbol.value as i64;
+                relocation.symbol = self.section_symbol(section);
+            }
+        }
+
+        // Determine whether the addend is stored in the relocation or the data.
+        if self.elf_has_relocation_addend()? {
+            Ok(0)
+        } else {
+            let constant = relocation.addend;
+            relocation.addend = 0;
+            Ok(constant)
+        }
+    }
+
+    pub(crate) fn elf_write(&self, buffer: &mut dyn WritableBuffer) -> Result<()> {
+        // Create reloc section header names so we can reference them.
+        let is_rela = self.elf_has_relocation_addend()?;
+        let reloc_names: Vec<_> = self
+            .sections
+            .iter()
+            .map(|section| {
+                let mut reloc_name = Vec::with_capacity(
+                    if is_rela { ".rela".len() } else { ".rel".len() } + section.name.len(),
+                );
+                if !section.relocations.is_empty() {
+                    reloc_name.extend_from_slice(if is_rela {
+                        &b".rela"[..]
+                    } else {
+                        &b".rel"[..]
+                    });
+                    reloc_name.extend_from_slice(&section.name);
+                }
+                reloc_name
+            })
+            .collect();
+
+        // Start calculating offsets of everything.
+        let is_64 = match self.architecture.address_size().unwrap() {
+            AddressSize::U8 | AddressSize::U16 | AddressSize::U32 => false,
+            AddressSize::U64 => true,
+        };
+        let mut writer = Writer::new(self.endian, is_64, buffer);
+        writer.reserve_file_header();
+
+        // Calculate size of section data.
+        let mut comdat_offsets = Vec::with_capacity(self.comdats.len());
+        for comdat in &self.comdats {
+            if comdat.kind != ComdatKind::Any {
+                return Err(Error(format!(
+                    "unsupported COMDAT symbol `{}` kind {:?}",
+                    self.symbols[comdat.symbol.0].name().unwrap_or(""),
+                    comdat.kind
+                )));
+            }
+
+            writer.reserve_section_index();
+            let offset = writer.reserve_comdat(comdat.sections.len());
+            let str_id = writer.add_section_name(b".group");
+            comdat_offsets.push(ComdatOffsets { offset, str_id });
+        }
+        let mut section_offsets = Vec::with_capacity(self.sections.len());
+        for (section, reloc_name) in self.sections.iter().zip(reloc_names.iter()) {
+            let index = writer.reserve_section_index();
+            let offset = writer.reserve(section.data.len(), section.align as usize);
+            let str_id = writer.add_section_name(&section.name);
+            let mut reloc_str_id = None;
+            if !section.relocations.is_empty() {
+                writer.reserve_section_index();
+                reloc_str_id = Some(writer.add_section_name(reloc_name));
+            }
+            section_offsets.push(SectionOffsets {
+                index,
+                offset,
+                str_id,
+                // Relocation data is reserved later.
+                reloc_offset: 0,
+                reloc_str_id,
+            });
+        }
+
+        // Calculate index of symbols and add symbol strings to strtab.
+        let mut symbol_offsets = vec![SymbolOffsets::default(); self.symbols.len()];
+        writer.reserve_null_symbol_index();
+        // Local symbols must come before global.
+        for (index, symbol) in self.symbols.iter().enumerate() {
+            if symbol.is_local() {
+                let section_index = symbol.section.id().map(|s| section_offsets[s.0].index);
+                symbol_offsets[index].index = writer.reserve_symbol_index(section_index);
+            }
+        }
+        let symtab_num_local = writer.symbol_count();
+        for (index, symbol) in self.symbols.iter().enumerate() {
+            if !symbol.is_local() {
+                let section_index = symbol.section.id().map(|s| section_offsets[s.0].index);
+                symbol_offsets[index].index = writer.reserve_symbol_index(section_index);
+            }
+        }
+        for (index, symbol) in self.symbols.iter().enumerate() {
+            if symbol.kind != SymbolKind::Section && !symbol.name.is_empty() {
+                symbol_offsets[index].str_id = Some(writer.add_string(&symbol.name));
+            }
+        }
+
+        // Calculate size of symbols.
+        writer.reserve_symtab_section_index();
+        writer.reserve_symtab();
+        if writer.symtab_shndx_needed() {
+            writer.reserve_symtab_shndx_section_index();
+        }
+        writer.reserve_symtab_shndx();
+        writer.reserve_strtab_section_index();
+        writer.reserve_strtab();
+
+        // Calculate size of relocations.
+        for (index, section) in self.sections.iter().enumerate() {
+            let count = section.relocations.len();
+            if count != 0 {
+                section_offsets[index].reloc_offset = writer.reserve_relocations(count, is_rela);
+            }
+        }
+
+        // Calculate size of section headers.
+        writer.reserve_shstrtab_section_index();
+        writer.reserve_shstrtab();
+        writer.reserve_section_headers();
+
+        // Start writing.
+        let e_type = elf::ET_REL;
+        let e_machine = match self.architecture {
+            Architecture::Aarch64 => elf::EM_AARCH64,
+            Architecture::Aarch64_Ilp32 => elf::EM_AARCH64,
+            Architecture::Arm => elf::EM_ARM,
+            Architecture::Avr => elf::EM_AVR,
+            Architecture::Bpf => elf::EM_BPF,
+            Architecture::I386 => elf::EM_386,
+            Architecture::X86_64 => elf::EM_X86_64,
+            Architecture::X86_64_X32 => elf::EM_X86_64,
+            Architecture::Hexagon => elf::EM_HEXAGON,
+            Architecture::LoongArch64 => elf::EM_LOONGARCH,
+            Architecture::Mips => elf::EM_MIPS,
+            Architecture::Mips64 => elf::EM_MIPS,
+            Architecture::Msp430 => elf::EM_MSP430,
+            Architecture::PowerPc => elf::EM_PPC,
+            Architecture::PowerPc64 => elf::EM_PPC64,
+            Architecture::Riscv32 => elf::EM_RISCV,
+            Architecture::Riscv64 => elf::EM_RISCV,
+            Architecture::S390x => elf::EM_S390,
+            Architecture::Sbf => elf::EM_SBF,
+            Architecture::Sparc64 => elf::EM_SPARCV9,
+            Architecture::Xtensa => elf::EM_XTENSA,
+            _ => {
+                return Err(Error(format!(
+                    "unimplemented architecture {:?}",
+                    self.architecture
+                )));
+            }
+        };
+        let (os_abi, abi_version, e_flags) = if let FileFlags::Elf {
+            os_abi,
+            abi_version,
+            e_flags,
+        } = self.flags
+        {
+            (os_abi, abi_version, e_flags)
+        } else {
+            (elf::ELFOSABI_NONE, 0, 0)
+        };
+        writer.write_file_header(&FileHeader {
+            os_abi,
+            abi_version,
+            e_type,
+            e_machine,
+            e_entry: 0,
+            e_flags,
+        })?;
+
+        // Write section data.
+        for comdat in &self.comdats {
+            writer.write_comdat_header();
+            for section in &comdat.sections {
+                writer.write_comdat_entry(section_offsets[section.0].index);
+            }
+        }
+        for (index, section) in self.sections.iter().enumerate() {
+            let len = section.data.len();
+            if len != 0 {
+                writer.write_align(section.align as usize);
+                debug_assert_eq!(section_offsets[index].offset, writer.len());
+                writer.write(&section.data);
+            }
+        }
+
+        // Write symbols.
+        writer.write_null_symbol();
+        let mut write_symbol = |index: usize, symbol: &Symbol| -> Result<()> {
+            let st_info = if let SymbolFlags::Elf { st_info, .. } = symbol.flags {
+                st_info
+            } else {
+                let st_type = match symbol.kind {
+                    SymbolKind::Null => elf::STT_NOTYPE,
+                    SymbolKind::Text => {
+                        if symbol.is_undefined() {
+                            elf::STT_NOTYPE
+                        } else {
+                            elf::STT_FUNC
+                        }
+                    }
+                    SymbolKind::Data => {
+                        if symbol.is_undefined() {
+                            elf::STT_NOTYPE
+                        } else if symbol.is_common() {
+                            elf::STT_COMMON
+                        } else {
+                            elf::STT_OBJECT
+                        }
+                    }
+                    SymbolKind::Section => elf::STT_SECTION,
+                    SymbolKind::File => elf::STT_FILE,
+                    SymbolKind::Tls => elf::STT_TLS,
+                    SymbolKind::Label => elf::STT_NOTYPE,
+                    SymbolKind::Unknown => {
+                        if symbol.is_undefined() {
+                            elf::STT_NOTYPE
+                        } else {
+                            return Err(Error(format!(
+                                "unimplemented symbol `{}` kind {:?}",
+                                symbol.name().unwrap_or(""),
+                                symbol.kind
+                            )));
+                        }
+                    }
+                };
+                let st_bind = if symbol.weak {
+                    elf::STB_WEAK
+                } else if symbol.is_undefined() {
+                    elf::STB_GLOBAL
+                } else if symbol.is_local() {
+                    elf::STB_LOCAL
+                } else {
+                    elf::STB_GLOBAL
+                };
+                (st_bind << 4) + st_type
+            };
+            let st_other = if let SymbolFlags::Elf { st_other, .. } = symbol.flags {
+                st_other
+            } else if symbol.scope == SymbolScope::Linkage {
+                elf::STV_HIDDEN
+            } else {
+                elf::STV_DEFAULT
+            };
+            let (st_shndx, section) = match symbol.section {
+                SymbolSection::None => {
+                    debug_assert_eq!(symbol.kind, SymbolKind::File);
+                    (elf::SHN_ABS, None)
+                }
+                SymbolSection::Undefined => (elf::SHN_UNDEF, None),
+                SymbolSection::Absolute => (elf::SHN_ABS, None),
+                SymbolSection::Common => (elf::SHN_COMMON, None),
+                SymbolSection::Section(id) => (0, Some(section_offsets[id.0].index)),
+            };
+            writer.write_symbol(&Sym {
+                name: symbol_offsets[index].str_id,
+                section,
+                st_info,
+                st_other,
+                st_shndx,
+                st_value: symbol.value,
+                st_size: symbol.size,
+            });
+            Ok(())
+        };
+        for (index, symbol) in self.symbols.iter().enumerate() {
+            if symbol.is_local() {
+                write_symbol(index, symbol)?;
+            }
+        }
+        for (index, symbol) in self.symbols.iter().enumerate() {
+            if !symbol.is_local() {
+                write_symbol(index, symbol)?;
+            }
+        }
+        writer.write_symtab_shndx();
+        writer.write_strtab();
+
+        // Write relocations.
+        for (index, section) in self.sections.iter().enumerate() {
+            if !section.relocations.is_empty() {
+                writer.write_align_relocation();
+                debug_assert_eq!(section_offsets[index].reloc_offset, writer.len());
+                for reloc in &section.relocations {
+                    let r_type = match self.architecture {
+                        Architecture::Aarch64 => match (reloc.kind, reloc.encoding, reloc.size) {
+                            (RelocationKind::Absolute, RelocationEncoding::Generic, 64) => {
+                                elf::R_AARCH64_ABS64
+                            }
+                            (RelocationKind::Absolute, RelocationEncoding::Generic, 32) => {
+                                elf::R_AARCH64_ABS32
+                            }
+                            (RelocationKind::Absolute, RelocationEncoding::Generic, 16) => {
+                                elf::R_AARCH64_ABS16
+                            }
+                            (RelocationKind::Relative, RelocationEncoding::Generic, 64) => {
+                                elf::R_AARCH64_PREL64
+                            }
+                            (RelocationKind::Relative, RelocationEncoding::Generic, 32) => {
+                                elf::R_AARCH64_PREL32
+                            }
+                            (RelocationKind::Relative, RelocationEncoding::Generic, 16) => {
+                                elf::R_AARCH64_PREL16
+                            }
+                            (RelocationKind::Relative, RelocationEncoding::AArch64Call, 26)
+                            | (RelocationKind::PltRelative, RelocationEncoding::AArch64Call, 26) => {
+                                elf::R_AARCH64_CALL26
+                            }
+                            (RelocationKind::Elf(x), _, _) => x,
+                            _ => {
+                                return Err(Error(format!("unimplemented relocation {:?}", reloc)));
+                            }
+                        },
+                        Architecture::Aarch64_Ilp32 => {
+                            match (reloc.kind, reloc.encoding, reloc.size) {
+                                (RelocationKind::Absolute, RelocationEncoding::Generic, 32) => {
+                                    elf::R_AARCH64_P32_ABS32
+                                }
+                                (RelocationKind::Elf(x), _, _) => x,
+                                _ => {
+                                    return Err(Error(format!(
+                                        "unimplemented relocation {:?}",
+                                        reloc
+                                    )));
+                                }
+                            }
+                        }
+                        Architecture::Arm => match (reloc.kind, reloc.encoding, reloc.size) {
+                            (RelocationKind::Absolute, _, 32) => elf::R_ARM_ABS32,
+                            (RelocationKind::Elf(x), _, _) => x,
+                            _ => {
+                                return Err(Error(format!("unimplemented relocation {:?}", reloc)));
+                            }
+                        },
+                        Architecture::Avr => match (reloc.kind, reloc.encoding, reloc.size) {
+                            (RelocationKind::Absolute, _, 32) => elf::R_AVR_32,
+                            (RelocationKind::Absolute, _, 16) => elf::R_AVR_16,
+                            (RelocationKind::Elf(x), _, _) => x,
+                            _ => {
+                                return Err(Error(format!("unimplemented relocation {:?}", reloc)));
+                            }
+                        },
+                        Architecture::Bpf => match (reloc.kind, reloc.encoding, reloc.size) {
+                            (RelocationKind::Absolute, _, 64) => elf::R_BPF_64_64,
+                            (RelocationKind::Absolute, _, 32) => elf::R_BPF_64_32,
+                            (RelocationKind::Elf(x), _, _) => x,
+                            _ => {
+                                return Err(Error(format!("unimplemented relocation {:?}", reloc)));
+                            }
+                        },
+                        Architecture::I386 => match (reloc.kind, reloc.size) {
+                            (RelocationKind::Absolute, 32) => elf::R_386_32,
+                            (RelocationKind::Relative, 32) => elf::R_386_PC32,
+                            (RelocationKind::Got, 32) => elf::R_386_GOT32,
+                            (RelocationKind::PltRelative, 32) => elf::R_386_PLT32,
+                            (RelocationKind::GotBaseOffset, 32) => elf::R_386_GOTOFF,
+                            (RelocationKind::GotBaseRelative, 32) => elf::R_386_GOTPC,
+                            (RelocationKind::Absolute, 16) => elf::R_386_16,
+                            (RelocationKind::Relative, 16) => elf::R_386_PC16,
+                            (RelocationKind::Absolute, 8) => elf::R_386_8,
+                            (RelocationKind::Relative, 8) => elf::R_386_PC8,
+                            (RelocationKind::Elf(x), _) => x,
+                            _ => {
+                                return Err(Error(format!("unimplemented relocation {:?}", reloc)));
+                            }
+                        },
+                        Architecture::X86_64 | Architecture::X86_64_X32 => {
+                            match (reloc.kind, reloc.encoding, reloc.size) {
+                                (RelocationKind::Absolute, RelocationEncoding::Generic, 64) => {
+                                    elf::R_X86_64_64
+                                }
+                                (RelocationKind::Relative, _, 32) => elf::R_X86_64_PC32,
+                                (RelocationKind::Got, _, 32) => elf::R_X86_64_GOT32,
+                                (RelocationKind::PltRelative, _, 32) => elf::R_X86_64_PLT32,
+                                (RelocationKind::GotRelative, _, 32) => elf::R_X86_64_GOTPCREL,
+                                (RelocationKind::Absolute, RelocationEncoding::Generic, 32) => {
+                                    elf::R_X86_64_32
+                                }
+                                (RelocationKind::Absolute, RelocationEncoding::X86Signed, 32) => {
+                                    elf::R_X86_64_32S
+                                }
+                                (RelocationKind::Absolute, _, 16) => elf::R_X86_64_16,
+                                (RelocationKind::Relative, _, 16) => elf::R_X86_64_PC16,
+                                (RelocationKind::Absolute, _, 8) => elf::R_X86_64_8,
+                                (RelocationKind::Relative, _, 8) => elf::R_X86_64_PC8,
+                                (RelocationKind::Elf(x), _, _) => x,
+                                _ => {
+                                    return Err(Error(format!(
+                                        "unimplemented relocation {:?}",
+                                        reloc
+                                    )));
+                                }
+                            }
+                        }
+                        Architecture::Hexagon => match (reloc.kind, reloc.encoding, reloc.size) {
+                            (RelocationKind::Absolute, _, 32) => elf::R_HEX_32,
+                            (RelocationKind::Elf(x), _, _) => x,
+                            _ => {
+                                return Err(Error(format!("unimplemented relocation {:?}", reloc)));
+                            }
+                        },
+                        Architecture::LoongArch64 => match (reloc.kind, reloc.encoding, reloc.size)
+                        {
+                            (RelocationKind::Absolute, _, 32) => elf::R_LARCH_32,
+                            (RelocationKind::Absolute, _, 64) => elf::R_LARCH_64,
+                            (RelocationKind::Relative, _, 32) => elf::R_LARCH_32_PCREL,
+                            (RelocationKind::Relative, RelocationEncoding::LoongArchBranch, 16)
+                            | (
+                                RelocationKind::PltRelative,
+                                RelocationEncoding::LoongArchBranch,
+                                16,
+                            ) => elf::R_LARCH_B16,
+                            (RelocationKind::Relative, RelocationEncoding::LoongArchBranch, 21)
+                            | (
+                                RelocationKind::PltRelative,
+                                RelocationEncoding::LoongArchBranch,
+                                21,
+                            ) => elf::R_LARCH_B21,
+                            (RelocationKind::Relative, RelocationEncoding::LoongArchBranch, 26)
+                            | (
+                                RelocationKind::PltRelative,
+                                RelocationEncoding::LoongArchBranch,
+                                26,
+                            ) => elf::R_LARCH_B26,
+                            (RelocationKind::Elf(x), _, _) => x,
+                            _ => {
+                                return Err(Error(format!("unimplemented relocation {:?}", reloc)));
+                            }
+                        },
+                        Architecture::Mips | Architecture::Mips64 => {
+                            match (reloc.kind, reloc.encoding, reloc.size) {
+                                (RelocationKind::Absolute, _, 16) => elf::R_MIPS_16,
+                                (RelocationKind::Absolute, _, 32) => elf::R_MIPS_32,
+                                (RelocationKind::Absolute, _, 64) => elf::R_MIPS_64,
+                                (RelocationKind::Elf(x), _, _) => x,
+                                _ => {
+                                    return Err(Error(format!(
+                                        "unimplemented relocation {:?}",
+                                        reloc
+                                    )));
+                                }
+                            }
+                        }
+                        Architecture::Msp430 => match (reloc.kind, reloc.encoding, reloc.size) {
+                            (RelocationKind::Absolute, _, 32) => elf::R_MSP430_32,
+                            (RelocationKind::Absolute, _, 16) => elf::R_MSP430_16_BYTE,
+                            (RelocationKind::Elf(x), _, _) => x,
+                            _ => {
+                                return Err(Error(format!("unimplemented relocation {:?}", reloc)));
+                            }
+                        },
+                        Architecture::PowerPc => match (reloc.kind, reloc.encoding, reloc.size) {
+                            (RelocationKind::Absolute, _, 32) => elf::R_PPC_ADDR32,
+                            (RelocationKind::Elf(x), _, _) => x,
+                            _ => {
+                                return Err(Error(format!("unimplemented relocation {:?}", reloc)));
+                            }
+                        },
+                        Architecture::PowerPc64 => match (reloc.kind, reloc.encoding, reloc.size) {
+                            (RelocationKind::Absolute, _, 32) => elf::R_PPC64_ADDR32,
+                            (RelocationKind::Absolute, _, 64) => elf::R_PPC64_ADDR64,
+                            (RelocationKind::Elf(x), _, _) => x,
+                            _ => {
+                                return Err(Error(format!("unimplemented relocation {:?}", reloc)));
+                            }
+                        },
+                        Architecture::Riscv32 | Architecture::Riscv64 => {
+                            match (reloc.kind, reloc.encoding, reloc.size) {
+                                (RelocationKind::Absolute, _, 32) => elf::R_RISCV_32,
+                                (RelocationKind::Absolute, _, 64) => elf::R_RISCV_64,
+                                (RelocationKind::Relative, RelocationEncoding::Generic, 32) => {
+                                    elf::R_RISCV_32_PCREL
+                                }
+                                (RelocationKind::Elf(x), _, _) => x,
+                                _ => {
+                                    return Err(Error(format!(
+                                        "unimplemented relocation {:?}",
+                                        reloc
+                                    )));
+                                }
+                            }
+                        }
+                        Architecture::S390x => match (reloc.kind, reloc.encoding, reloc.size) {
+                            (RelocationKind::Absolute, RelocationEncoding::Generic, 8) => {
+                                elf::R_390_8
+                            }
+                            (RelocationKind::Absolute, RelocationEncoding::Generic, 16) => {
+                                elf::R_390_16
+                            }
+                            (RelocationKind::Absolute, RelocationEncoding::Generic, 32) => {
+                                elf::R_390_32
+                            }
+                            (RelocationKind::Absolute, RelocationEncoding::Generic, 64) => {
+                                elf::R_390_64
+                            }
+                            (RelocationKind::Relative, RelocationEncoding::Generic, 16) => {
+                                elf::R_390_PC16
+                            }
+                            (RelocationKind::Relative, RelocationEncoding::Generic, 32) => {
+                                elf::R_390_PC32
+                            }
+                            (RelocationKind::Relative, RelocationEncoding::Generic, 64) => {
+                                elf::R_390_PC64
+                            }
+                            (RelocationKind::Relative, RelocationEncoding::S390xDbl, 16) => {
+                                elf::R_390_PC16DBL
+                            }
+                            (RelocationKind::Relative, RelocationEncoding::S390xDbl, 32) => {
+                                elf::R_390_PC32DBL
+                            }
+                            (RelocationKind::PltRelative, RelocationEncoding::S390xDbl, 16) => {
+                                elf::R_390_PLT16DBL
+                            }
+                            (RelocationKind::PltRelative, RelocationEncoding::S390xDbl, 32) => {
+                                elf::R_390_PLT32DBL
+                            }
+                            (RelocationKind::Got, RelocationEncoding::Generic, 16) => {
+                                elf::R_390_GOT16
+                            }
+                            (RelocationKind::Got, RelocationEncoding::Generic, 32) => {
+                                elf::R_390_GOT32
+                            }
+                            (RelocationKind::Got, RelocationEncoding::Generic, 64) => {
+                                elf::R_390_GOT64
+                            }
+                            (RelocationKind::GotRelative, RelocationEncoding::S390xDbl, 32) => {
+                                elf::R_390_GOTENT
+                            }
+                            (RelocationKind::GotBaseOffset, RelocationEncoding::Generic, 16) => {
+                                elf::R_390_GOTOFF16
+                            }
+                            (RelocationKind::GotBaseOffset, RelocationEncoding::Generic, 32) => {
+                                elf::R_390_GOTOFF32
+                            }
+                            (RelocationKind::GotBaseOffset, RelocationEncoding::Generic, 64) => {
+                                elf::R_390_GOTOFF64
+                            }
+                            (RelocationKind::GotBaseRelative, RelocationEncoding::Generic, 64) => {
+                                elf::R_390_GOTPC
+                            }
+                            (RelocationKind::GotBaseRelative, RelocationEncoding::S390xDbl, 32) => {
+                                elf::R_390_GOTPCDBL
+                            }
+                            (RelocationKind::Elf(x), _, _) => x,
+                            _ => {
+                                return Err(Error(format!("unimplemented relocation {:?}", reloc)));
+                            }
+                        },
+                        Architecture::Sbf => match (reloc.kind, reloc.encoding, reloc.size) {
+                            (RelocationKind::Absolute, _, 64) => elf::R_SBF_64_64,
+                            (RelocationKind::Absolute, _, 32) => elf::R_SBF_64_32,
+                            (RelocationKind::Elf(x), _, _) => x,
+                            _ => {
+                                return Err(Error(format!("unimplemented relocation {:?}", reloc)));
+                            }
+                        },
+                        Architecture::Sparc64 => match (reloc.kind, reloc.encoding, reloc.size) {
+                            // TODO: use R_SPARC_32/R_SPARC_64 if aligned.
+                            (RelocationKind::Absolute, _, 32) => elf::R_SPARC_UA32,
+                            (RelocationKind::Absolute, _, 64) => elf::R_SPARC_UA64,
+                            (RelocationKind::Elf(x), _, _) => x,
+                            _ => {
+                                return Err(Error(format!("unimplemented relocation {:?}", reloc)));
+                            }
+                        },
+                        Architecture::Xtensa => match (reloc.kind, reloc.encoding, reloc.size) {
+                            (RelocationKind::Absolute, _, 32) => elf::R_XTENSA_32,
+                            (RelocationKind::Relative, RelocationEncoding::Generic, 32) => {
+                                elf::R_XTENSA_32_PCREL
+                            }
+                            (RelocationKind::Elf(x), _, _) => x,
+                            _ => {
+                                return Err(Error(format!("unimplemented relocation {:?}", reloc)));
+                            }
+                        },
+                        _ => {
+                            if let RelocationKind::Elf(x) = reloc.kind {
+                                x
+                            } else {
+                                return Err(Error(format!("unimplemented relocation {:?}", reloc)));
+                            }
+                        }
+                    };
+                    let r_sym = symbol_offsets[reloc.symbol.0].index.0;
+                    writer.write_relocation(
+                        is_rela,
+                        &Rel {
+                            r_offset: reloc.offset,
+                            r_sym,
+                            r_type,
+                            r_addend: reloc.addend,
+                        },
+                    );
+                }
+            }
+        }
+
+        writer.write_shstrtab();
+
+        // Write section headers.
+        writer.write_null_section_header();
+
+        let symtab_index = writer.symtab_index();
+        for (comdat, comdat_offset) in self.comdats.iter().zip(comdat_offsets.iter()) {
+            writer.write_comdat_section_header(
+                comdat_offset.str_id,
+                symtab_index,
+                symbol_offsets[comdat.symbol.0].index,
+                comdat_offset.offset,
+                comdat.sections.len(),
+            );
+        }
+        for (index, section) in self.sections.iter().enumerate() {
+            let sh_type = match section.kind {
+                SectionKind::UninitializedData | SectionKind::UninitializedTls => elf::SHT_NOBITS,
+                SectionKind::Note => elf::SHT_NOTE,
+                SectionKind::Elf(sh_type) => sh_type,
+                _ => elf::SHT_PROGBITS,
+            };
+            let sh_flags = if let SectionFlags::Elf { sh_flags } = section.flags {
+                sh_flags
+            } else {
+                match section.kind {
+                    SectionKind::Text => elf::SHF_ALLOC | elf::SHF_EXECINSTR,
+                    SectionKind::Data | SectionKind::ReadOnlyDataWithRel => {
+                        elf::SHF_ALLOC | elf::SHF_WRITE
+                    }
+                    SectionKind::Tls => elf::SHF_ALLOC | elf::SHF_WRITE | elf::SHF_TLS,
+                    SectionKind::UninitializedData => elf::SHF_ALLOC | elf::SHF_WRITE,
+                    SectionKind::UninitializedTls => elf::SHF_ALLOC | elf::SHF_WRITE | elf::SHF_TLS,
+                    SectionKind::ReadOnlyData => elf::SHF_ALLOC,
+                    SectionKind::ReadOnlyString => {
+                        elf::SHF_ALLOC | elf::SHF_STRINGS | elf::SHF_MERGE
+                    }
+                    SectionKind::OtherString => elf::SHF_STRINGS | elf::SHF_MERGE,
+                    SectionKind::Other
+                    | SectionKind::Debug
+                    | SectionKind::Metadata
+                    | SectionKind::Linker
+                    | SectionKind::Note
+                    | SectionKind::Elf(_) => 0,
+                    SectionKind::Unknown | SectionKind::Common | SectionKind::TlsVariables => {
+                        return Err(Error(format!(
+                            "unimplemented section `{}` kind {:?}",
+                            section.name().unwrap_or(""),
+                            section.kind
+                        )));
+                    }
+                }
+                .into()
+            };
+            // TODO: not sure if this is correct, maybe user should determine this
+            let sh_entsize = match section.kind {
+                SectionKind::ReadOnlyString | SectionKind::OtherString => 1,
+                _ => 0,
+            };
+            writer.write_section_header(&SectionHeader {
+                name: Some(section_offsets[index].str_id),
+                sh_type,
+                sh_flags,
+                sh_addr: 0,
+                sh_offset: section_offsets[index].offset as u64,
+                sh_size: section.size,
+                sh_link: 0,
+                sh_info: 0,
+                sh_addralign: section.align,
+                sh_entsize,
+            });
+
+            if !section.relocations.is_empty() {
+                writer.write_relocation_section_header(
+                    section_offsets[index].reloc_str_id.unwrap(),
+                    section_offsets[index].index,
+                    symtab_index,
+                    section_offsets[index].reloc_offset,
+                    section.relocations.len(),
+                    is_rela,
+                );
+            }
+        }
+
+        writer.write_symtab_section_header(symtab_num_local);
+        writer.write_symtab_shndx_section_header();
+        writer.write_strtab_section_header();
+        writer.write_shstrtab_section_header();
+
+        debug_assert_eq!(writer.reserved_len(), writer.len());
+
+        Ok(())
+    }
+}
diff --git a/third_party/rust/object/src/write/elf/writer.rs b/third_party/rust/object/src/write/elf/writer.rs
new file mode 100644
index 0000000000..3c9d85a126
--- /dev/null
+++ b/third_party/rust/object/src/write/elf/writer.rs
@@ -0,0 +1,1955 @@
+//! Helper for writing ELF files.
+use alloc::string::String;
+use alloc::vec::Vec;
+use core::mem;
+
+use crate::elf;
+use crate::endian::*;
+use crate::write::string::{StringId, StringTable};
+use crate::write::util;
+use crate::write::{Error, Result, WritableBuffer};
+
+/// The index of an ELF section.
+#[derive(Debug, Default, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub struct SectionIndex(pub u32);
+
+/// The index of an ELF symbol.
+#[derive(Debug, Default, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub struct SymbolIndex(pub u32);
+
+/// A helper for writing ELF files.
+///
+/// Writing uses a two phase approach. The first phase builds up all of the information
+/// that may need to be known ahead of time:
+/// - build string tables
+/// - reserve section indices
+/// - reserve symbol indices
+/// - reserve file ranges for headers and sections
+///
+/// Some of the information has ordering requirements. For example, strings must be added
+/// to string tables before reserving the file range for the string table. Symbol indices
+/// must be reserved after reserving the section indices they reference. There are debug
+/// asserts to check some of these requirements.
+///
+/// The second phase writes everything out in order. Thus the caller must ensure writing
+/// is in the same order that file ranges were reserved. There are debug asserts to assist
+/// with checking this.
+#[allow(missing_debug_implementations)]
+pub struct Writer<'a> {
+    endian: Endianness,
+    is_64: bool,
+    is_mips64el: bool,
+    elf_align: usize,
+
+    buffer: &'a mut dyn WritableBuffer,
+    len: usize,
+
+    segment_offset: usize,
+    segment_num: u32,
+
+    section_offset: usize,
+    section_num: u32,
+
+    shstrtab: StringTable<'a>,
+    shstrtab_str_id: Option<StringId>,
+    shstrtab_index: SectionIndex,
+    shstrtab_offset: usize,
+    shstrtab_data: Vec<u8>,
+
+    need_strtab: bool,
+    strtab: StringTable<'a>,
+    strtab_str_id: Option<StringId>,
+    strtab_index: SectionIndex,
+    strtab_offset: usize,
+    strtab_data: Vec<u8>,
+
+    symtab_str_id: Option<StringId>,
+    symtab_index: SectionIndex,
+    symtab_offset: usize,
+    symtab_num: u32,
+
+    need_symtab_shndx: bool,
+    symtab_shndx_str_id: Option<StringId>,
+    symtab_shndx_offset: usize,
+    symtab_shndx_data: Vec<u8>,
+
+    need_dynstr: bool,
+    dynstr: StringTable<'a>,
+    dynstr_str_id: Option<StringId>,
+    dynstr_index: SectionIndex,
+    dynstr_offset: usize,
+    dynstr_data: Vec<u8>,
+
+    dynsym_str_id: Option<StringId>,
+    dynsym_index: SectionIndex,
+    dynsym_offset: usize,
+    dynsym_num: u32,
+
+    dynamic_str_id: Option<StringId>,
+    dynamic_offset: usize,
+    dynamic_num: usize,
+
+    hash_str_id: Option<StringId>,
+    hash_offset: usize,
+    hash_size: usize,
+
+    gnu_hash_str_id: Option<StringId>,
+    gnu_hash_offset: usize,
+    gnu_hash_size: usize,
+
+    gnu_versym_str_id: Option<StringId>,
+    gnu_versym_offset: usize,
+
+    gnu_verdef_str_id: Option<StringId>,
+    gnu_verdef_offset: usize,
+    gnu_verdef_size: usize,
+    gnu_verdef_count: u16,
+    gnu_verdef_remaining: u16,
+    gnu_verdaux_remaining: u16,
+
+    gnu_verneed_str_id: Option<StringId>,
+    gnu_verneed_offset: usize,
+    gnu_verneed_size: usize,
+    gnu_verneed_count: u16,
+    gnu_verneed_remaining: u16,
+    gnu_vernaux_remaining: u16,
+}
+
+impl<'a> Writer<'a> {
+    /// Create a new `Writer` for the given endianness and ELF class.
+    pub fn new(endian: Endianness, is_64: bool, buffer: &'a mut dyn WritableBuffer) -> Self {
+        let elf_align = if is_64 { 8 } else { 4 };
+        Writer {
+            endian,
+            is_64,
+            // Determined later.
+            is_mips64el: false,
+            elf_align,
+
+            buffer,
+            len: 0,
+
+            segment_offset: 0,
+            segment_num: 0,
+
+            section_offset: 0,
+            section_num: 0,
+
+            shstrtab: StringTable::default(),
+            shstrtab_str_id: None,
+            shstrtab_index: SectionIndex(0),
+            shstrtab_offset: 0,
+            shstrtab_data: Vec::new(),
+
+            need_strtab: false,
+            strtab: StringTable::default(),
+            strtab_str_id: None,
+            strtab_index: SectionIndex(0),
+            strtab_offset: 0,
+            strtab_data: Vec::new(),
+
+            symtab_str_id: None,
+            symtab_index: SectionIndex(0),
+            symtab_offset: 0,
+            symtab_num: 0,
+
+            need_symtab_shndx: false,
+            symtab_shndx_str_id: None,
+            symtab_shndx_offset: 0,
+            symtab_shndx_data: Vec::new(),
+
+            need_dynstr: false,
+            dynstr: StringTable::default(),
+            dynstr_str_id: None,
+            dynstr_index: SectionIndex(0),
+            dynstr_offset: 0,
+            dynstr_data: Vec::new(),
+
+            dynsym_str_id: None,
+            dynsym_index: SectionIndex(0),
+            dynsym_offset: 0,
+            dynsym_num: 0,
+
+            dynamic_str_id: None,
+            dynamic_offset: 0,
+            dynamic_num: 0,
+
+            hash_str_id: None,
+            hash_offset: 0,
+            hash_size: 0,
+
+            gnu_hash_str_id: None,
+            gnu_hash_offset: 0,
+            gnu_hash_size: 0,
+
+            gnu_versym_str_id: None,
+            gnu_versym_offset: 0,
+
+            gnu_verdef_str_id: None,
+            gnu_verdef_offset: 0,
+            gnu_verdef_size: 0,
+            gnu_verdef_count: 0,
+            gnu_verdef_remaining: 0,
+            gnu_verdaux_remaining: 0,
+
+            gnu_verneed_str_id: None,
+            gnu_verneed_offset: 0,
+            gnu_verneed_size: 0,
+            gnu_verneed_count: 0,
+            gnu_verneed_remaining: 0,
+            gnu_vernaux_remaining: 0,
+        }
+    }
+
+    /// Return the current file length that has been reserved.
+    pub fn reserved_len(&self) -> usize {
+        self.len
+    }
+
+    /// Return the current file length that has been written.
+    #[allow(clippy::len_without_is_empty)]
+    pub fn len(&self) -> usize {
+        self.buffer.len()
+    }
+
+    /// Reserve a file range with the given size and starting alignment.
+    ///
+    /// Returns the aligned offset of the start of the range.
+    pub fn reserve(&mut self, len: usize, align_start: usize) -> usize {
+        if len == 0 {
+            return self.len;
+        }
+        self.len = util::align(self.len, align_start);
+        let offset = self.len;
+        self.len += len;
+        offset
+    }
+
+    /// Write alignment padding bytes.
+    pub fn write_align(&mut self, align_start: usize) {
+        util::write_align(self.buffer, align_start);
+    }
+
+    /// Write data.
+    ///
+    /// This is typically used to write section data.
+    pub fn write(&mut self, data: &[u8]) {
+        self.buffer.write_bytes(data);
+    }
+
+    /// Reserve the file range up to the given file offset.
+    pub fn reserve_until(&mut self, offset: usize) {
+        debug_assert!(self.len <= offset);
+        self.len = offset;
+    }
+
+    /// Write padding up to the given file offset.
+    pub fn pad_until(&mut self, offset: usize) {
+        debug_assert!(self.buffer.len() <= offset);
+        self.buffer.resize(offset);
+    }
+
+    fn file_header_size(&self) -> usize {
+        if self.is_64 {
+            mem::size_of::<elf::FileHeader64<Endianness>>()
+        } else {
+            mem::size_of::<elf::FileHeader32<Endianness>>()
+        }
+    }
+
+    /// Reserve the range for the file header.
+    ///
+    /// This must be at the start of the file.
+    pub fn reserve_file_header(&mut self) {
+        debug_assert_eq!(self.len, 0);
+        self.reserve(self.file_header_size(), 1);
+    }
+
+    /// Write the file header.
+    ///
+    /// This must be at the start of the file.
+    ///
+    /// Fields that can be derived from known information are automatically set by this function.
+    pub fn write_file_header(&mut self, header: &FileHeader) -> Result<()> {
+        debug_assert_eq!(self.buffer.len(), 0);
+
+        self.is_mips64el =
+            self.is_64 && self.endian.is_little_endian() && header.e_machine == elf::EM_MIPS;
+
+        // Start writing.
+        self.buffer
+            .reserve(self.len)
+            .map_err(|_| Error(String::from("Cannot allocate buffer")))?;
+
+        // Write file header.
+        let e_ident = elf::Ident {
+            magic: elf::ELFMAG,
+            class: if self.is_64 {
+                elf::ELFCLASS64
+            } else {
+                elf::ELFCLASS32
+            },
+            data: if self.endian.is_little_endian() {
+                elf::ELFDATA2LSB
+            } else {
+                elf::ELFDATA2MSB
+            },
+            version: elf::EV_CURRENT,
+            os_abi: header.os_abi,
+            abi_version: header.abi_version,
+            padding: [0; 7],
+        };
+
+        let e_ehsize = self.file_header_size() as u16;
+
+        let e_phoff = self.segment_offset as u64;
+        let e_phentsize = if self.segment_num == 0 {
+            0
+        } else {
+            self.program_header_size() as u16
+        };
+        // TODO: overflow
+        let e_phnum = self.segment_num as u16;
+
+        let e_shoff = self.section_offset as u64;
+        let e_shentsize = if self.section_num == 0 {
+            0
+        } else {
+            self.section_header_size() as u16
+        };
+        let e_shnum = if self.section_num >= elf::SHN_LORESERVE.into() {
+            0
+        } else {
+            self.section_num as u16
+        };
+        let e_shstrndx = if self.shstrtab_index.0 >= elf::SHN_LORESERVE.into() {
+            elf::SHN_XINDEX
+        } else {
+            self.shstrtab_index.0 as u16
+        };
+
+        let endian = self.endian;
+        if self.is_64 {
+            let file = elf::FileHeader64 {
+                e_ident,
+                e_type: U16::new(endian, header.e_type),
+                e_machine: U16::new(endian, header.e_machine),
+                e_version: U32::new(endian, elf::EV_CURRENT.into()),
+                e_entry: U64::new(endian, header.e_entry),
+                e_phoff: U64::new(endian, e_phoff),
+                e_shoff: U64::new(endian, e_shoff),
+                e_flags: U32::new(endian, header.e_flags),
+                e_ehsize: U16::new(endian, e_ehsize),
+                e_phentsize: U16::new(endian, e_phentsize),
+                e_phnum: U16::new(endian, e_phnum),
+                e_shentsize: U16::new(endian, e_shentsize),
+                e_shnum: U16::new(endian, e_shnum),
+                e_shstrndx: U16::new(endian, e_shstrndx),
+            };
+            self.buffer.write(&file)
+        } else {
+            let file = elf::FileHeader32 {
+                e_ident,
+                e_type: U16::new(endian, header.e_type),
+                e_machine: U16::new(endian, header.e_machine),
+                e_version: U32::new(endian, elf::EV_CURRENT.into()),
+                e_entry: U32::new(endian, header.e_entry as u32),
+                e_phoff: U32::new(endian, e_phoff as u32),
+                e_shoff: U32::new(endian, e_shoff as u32),
+                e_flags: U32::new(endian, header.e_flags),
+                e_ehsize: U16::new(endian, e_ehsize),
+                e_phentsize: U16::new(endian, e_phentsize),
+                e_phnum: U16::new(endian, e_phnum),
+                e_shentsize: U16::new(endian, e_shentsize),
+                e_shnum: U16::new(endian, e_shnum),
+                e_shstrndx: U16::new(endian, e_shstrndx),
+            };
+            self.buffer.write(&file);
+        }
+
+        Ok(())
+    }
+
+    fn program_header_size(&self) -> usize {
+        if self.is_64 {
+            mem::size_of::<elf::ProgramHeader64<Endianness>>()
+        } else {
+            mem::size_of::<elf::ProgramHeader32<Endianness>>()
+        }
+    }
+
+    /// Reserve the range for the program headers.
+    pub fn reserve_program_headers(&mut self, num: u32) {
+        debug_assert_eq!(self.segment_offset, 0);
+        if num == 0 {
+            return;
+        }
+        self.segment_num = num;
+        self.segment_offset =
+            self.reserve(num as usize * self.program_header_size(), self.elf_align);
+    }
+
+    /// Write alignment padding bytes prior to the program headers.
+    pub fn write_align_program_headers(&mut self) {
+        if self.segment_offset == 0 {
+            return;
+        }
+        util::write_align(self.buffer, self.elf_align);
+        debug_assert_eq!(self.segment_offset, self.buffer.len());
+    }
+
+    /// Write a program header.
+    pub fn write_program_header(&mut self, header: &ProgramHeader) {
+        let endian = self.endian;
+        if self.is_64 {
+            let header = elf::ProgramHeader64 {
+                p_type: U32::new(endian, header.p_type),
+                p_flags: U32::new(endian, header.p_flags),
+                p_offset: U64::new(endian, header.p_offset),
+                p_vaddr: U64::new(endian, header.p_vaddr),
+                p_paddr: U64::new(endian, header.p_paddr),
+                p_filesz: U64::new(endian, header.p_filesz),
+                p_memsz: U64::new(endian, header.p_memsz),
+                p_align: U64::new(endian, header.p_align),
+            };
+            self.buffer.write(&header);
+        } else {
+            let header = elf::ProgramHeader32 {
+                p_type: U32::new(endian, header.p_type),
+                p_offset: U32::new(endian, header.p_offset as u32),
+                p_vaddr: U32::new(endian, header.p_vaddr as u32),
+                p_paddr: U32::new(endian, header.p_paddr as u32),
+                p_filesz: U32::new(endian, header.p_filesz as u32),
+                p_memsz: U32::new(endian, header.p_memsz as u32),
+                p_flags: U32::new(endian, header.p_flags),
+                p_align: U32::new(endian, header.p_align as u32),
+            };
+            self.buffer.write(&header);
+        }
+    }
+
+    /// Reserve the section index for the null section header.
+    ///
+    /// The null section header is usually automatically reserved,
+    /// but this can be used to force an empty section table.
+    ///
+    /// This must be called before [`Self::reserve_section_headers`].
+    pub fn reserve_null_section_index(&mut self) -> SectionIndex {
+        debug_assert_eq!(self.section_num, 0);
+        if self.section_num == 0 {
+            self.section_num = 1;
+        }
+        SectionIndex(0)
+    }
+
+    /// Reserve a section table index.
+    ///
+    /// Automatically also reserves the null section header if required.
+    ///
+    /// This must be called before [`Self::reserve_section_headers`].
+    pub fn reserve_section_index(&mut self) -> SectionIndex {
+        debug_assert_eq!(self.section_offset, 0);
+        if self.section_num == 0 {
+            self.section_num = 1;
+        }
+        let index = self.section_num;
+        self.section_num += 1;
+        SectionIndex(index)
+    }
+
+    fn section_header_size(&self) -> usize {
+        if self.is_64 {
+            mem::size_of::<elf::SectionHeader64<Endianness>>()
+        } else {
+            mem::size_of::<elf::SectionHeader32<Endianness>>()
+        }
+    }
+
+    /// Reserve the range for the section headers.
+    ///
+    /// This function does nothing if no sections were reserved.
+    /// This must be called after [`Self::reserve_section_index`]
+    /// and other functions that reserve section indices.
+    pub fn reserve_section_headers(&mut self) {
+        debug_assert_eq!(self.section_offset, 0);
+        if self.section_num == 0 {
+            return;
+        }
+        self.section_offset = self.reserve(
+            self.section_num as usize * self.section_header_size(),
+            self.elf_align,
+        );
+    }
+
+    /// Write the null section header.
+    ///
+    /// This must be the first section header that is written.
+    /// This function does nothing if no sections were reserved.
+    pub fn write_null_section_header(&mut self) {
+        if self.section_num == 0 {
+            return;
+        }
+        util::write_align(self.buffer, self.elf_align);
+        debug_assert_eq!(self.section_offset, self.buffer.len());
+        self.write_section_header(&SectionHeader {
+            name: None,
+            sh_type: 0,
+            sh_flags: 0,
+            sh_addr: 0,
+            sh_offset: 0,
+            sh_size: if self.section_num >= elf::SHN_LORESERVE.into() {
+                self.section_num.into()
+            } else {
+                0
+            },
+            sh_link: if self.shstrtab_index.0 >= elf::SHN_LORESERVE.into() {
+                self.shstrtab_index.0
+            } else {
+                0
+            },
+            // TODO: e_phnum overflow
+            sh_info: 0,
+            sh_addralign: 0,
+            sh_entsize: 0,
+        });
+    }
+
+    /// Write a section header.
+    pub fn write_section_header(&mut self, section: &SectionHeader) {
+        let sh_name = if let Some(name) = section.name {
+            self.shstrtab.get_offset(name) as u32
+        } else {
+            0
+        };
+        let endian = self.endian;
+        if self.is_64 {
+            let section = elf::SectionHeader64 {
+                sh_name: U32::new(endian, sh_name),
+                sh_type: U32::new(endian, section.sh_type),
+                sh_flags: U64::new(endian, section.sh_flags),
+                sh_addr: U64::new(endian, section.sh_addr),
+                sh_offset: U64::new(endian, section.sh_offset),
+                sh_size: U64::new(endian, section.sh_size),
+                sh_link: U32::new(endian, section.sh_link),
+                sh_info: U32::new(endian, section.sh_info),
+                sh_addralign: U64::new(endian, section.sh_addralign),
+                sh_entsize: U64::new(endian, section.sh_entsize),
+            };
+            self.buffer.write(&section);
+        } else {
+            let section = elf::SectionHeader32 {
+                sh_name: U32::new(endian, sh_name),
+                sh_type: U32::new(endian, section.sh_type),
+                sh_flags: U32::new(endian, section.sh_flags as u32),
+                sh_addr: U32::new(endian, section.sh_addr as u32),
+                sh_offset: U32::new(endian, section.sh_offset as u32),
+                sh_size: U32::new(endian, section.sh_size as u32),
+                sh_link: U32::new(endian, section.sh_link),
+                sh_info: U32::new(endian, section.sh_info),
+                sh_addralign: U32::new(endian, section.sh_addralign as u32),
+                sh_entsize: U32::new(endian, section.sh_entsize as u32),
+            };
+            self.buffer.write(&section);
+        }
+    }
+
+    /// Add a section name to the section header string table.
+    ///
+    /// This will be stored in the `.shstrtab` section.
+    ///
+    /// This must be called before [`Self::reserve_shstrtab`].
+    pub fn add_section_name(&mut self, name: &'a [u8]) -> StringId {
+        debug_assert_eq!(self.shstrtab_offset, 0);
+        self.shstrtab.add(name)
+    }
+
+    /// Reserve the range for the section header string table.
+    ///
+    /// This range is used for a section named `.shstrtab`.
+    ///
+    /// This function does nothing if no sections were reserved.
+    /// This must be called after [`Self::add_section_name`].
+    /// and other functions that reserve section names and indices.
+    pub fn reserve_shstrtab(&mut self) {
+        debug_assert_eq!(self.shstrtab_offset, 0);
+        if self.section_num == 0 {
+            return;
+        }
+        // Start with null section name.
+        self.shstrtab_data = vec![0];
+        self.shstrtab.write(1, &mut self.shstrtab_data);
+        self.shstrtab_offset = self.reserve(self.shstrtab_data.len(), 1);
+    }
+
+    /// Write the section header string table.
+    ///
+    /// This function does nothing if the section was not reserved.
+    pub fn write_shstrtab(&mut self) {
+        if self.shstrtab_offset == 0 {
+            return;
+        }
+        debug_assert_eq!(self.shstrtab_offset, self.buffer.len());
+        self.buffer.write_bytes(&self.shstrtab_data);
+    }
+
+    /// Reserve the section index for the section header string table.
+    ///
+    /// This must be called before [`Self::reserve_shstrtab`]
+    /// and [`Self::reserve_section_headers`].
+    pub fn reserve_shstrtab_section_index(&mut self) -> SectionIndex {
+        debug_assert_eq!(self.shstrtab_index, SectionIndex(0));
+        self.shstrtab_str_id = Some(self.add_section_name(&b".shstrtab"[..]));
+        self.shstrtab_index = self.reserve_section_index();
+        self.shstrtab_index
+    }
+
+    /// Write the section header for the section header string table.
+    ///
+    /// This function does nothing if the section index was not reserved.
+    pub fn write_shstrtab_section_header(&mut self) {
+        if self.shstrtab_index == SectionIndex(0) {
+            return;
+        }
+        self.write_section_header(&SectionHeader {
+            name: self.shstrtab_str_id,
+            sh_type: elf::SHT_STRTAB,
+            sh_flags: 0,
+            sh_addr: 0,
+            sh_offset: self.shstrtab_offset as u64,
+            sh_size: self.shstrtab_data.len() as u64,
+            sh_link: 0,
+            sh_info: 0,
+            sh_addralign: 1,
+            sh_entsize: 0,
+        });
+    }
+
+    /// Add a string to the string table.
+    ///
+    /// This will be stored in the `.strtab` section.
+    ///
+    /// This must be called before [`Self::reserve_strtab`].
+    pub fn add_string(&mut self, name: &'a [u8]) -> StringId {
+        debug_assert_eq!(self.strtab_offset, 0);
+        self.need_strtab = true;
+        self.strtab.add(name)
+    }
+
+    /// Return true if `.strtab` is needed.
+    pub fn strtab_needed(&self) -> bool {
+        self.need_strtab
+    }
+
+    /// Reserve the range for the string table.
+    ///
+    /// This range is used for a section named `.strtab`.
+    ///
+    /// This function does nothing if no strings or symbols were defined.
+    /// This must be called after [`Self::add_string`].
+    pub fn reserve_strtab(&mut self) {
+        debug_assert_eq!(self.strtab_offset, 0);
+        if !self.need_strtab {
+            return;
+        }
+        // Start with null string.
+        self.strtab_data = vec![0];
+        self.strtab.write(1, &mut self.strtab_data);
+        self.strtab_offset = self.reserve(self.strtab_data.len(), 1);
+    }
+
+    /// Write the string table.
+    ///
+    /// This function does nothing if the section was not reserved.
+    pub fn write_strtab(&mut self) {
+        if self.strtab_offset == 0 {
+            return;
+        }
+        debug_assert_eq!(self.strtab_offset, self.buffer.len());
+        self.buffer.write_bytes(&self.strtab_data);
+    }
+
+    /// Reserve the section index for the string table.
+    ///
+    /// This must be called before [`Self::reserve_section_headers`].
+    pub fn reserve_strtab_section_index(&mut self) -> SectionIndex {
+        debug_assert_eq!(self.strtab_index, SectionIndex(0));
+        self.strtab_str_id = Some(self.add_section_name(&b".strtab"[..]));
+        self.strtab_index = self.reserve_section_index();
+        self.strtab_index
+    }
+
+    /// Write the section header for the string table.
+    ///
+    /// This function does nothing if the section index was not reserved.
+    pub fn write_strtab_section_header(&mut self) {
+        if self.strtab_index == SectionIndex(0) {
+            return;
+        }
+        self.write_section_header(&SectionHeader {
+            name: self.strtab_str_id,
+            sh_type: elf::SHT_STRTAB,
+            sh_flags: 0,
+            sh_addr: 0,
+            sh_offset: self.strtab_offset as u64,
+            sh_size: self.strtab_data.len() as u64,
+            sh_link: 0,
+            sh_info: 0,
+            sh_addralign: 1,
+            sh_entsize: 0,
+        });
+    }
+
+    /// Reserve the null symbol table entry.
+    ///
+    /// This will be stored in the `.symtab` section.
+    ///
+    /// The null symbol table entry is usually automatically reserved,
+    /// but this can be used to force an empty symbol table.
+    ///
+    /// This must be called before [`Self::reserve_symtab`].
+    pub fn reserve_null_symbol_index(&mut self) -> SymbolIndex {
+        debug_assert_eq!(self.symtab_offset, 0);
+        debug_assert_eq!(self.symtab_num, 0);
+        self.symtab_num = 1;
+        // The symtab must link to a strtab.
+        self.need_strtab = true;
+        SymbolIndex(0)
+    }
+
+    /// Reserve a symbol table entry.
+    ///
+    /// This will be stored in the `.symtab` section.
+    ///
+    /// `section_index` is used to determine whether `.symtab_shndx` is required.
+    ///
+    /// Automatically also reserves the null symbol if required.
+    /// Callers may assume that the returned indices will be sequential
+    /// starting at 1.
+    ///
+    /// This must be called before [`Self::reserve_symtab`] and
+    /// [`Self::reserve_symtab_shndx`].
+    pub fn reserve_symbol_index(&mut self, section_index: Option<SectionIndex>) -> SymbolIndex {
+        debug_assert_eq!(self.symtab_offset, 0);
+        debug_assert_eq!(self.symtab_shndx_offset, 0);
+        if self.symtab_num == 0 {
+            self.symtab_num = 1;
+            // The symtab must link to a strtab.
+            self.need_strtab = true;
+        }
+        let index = self.symtab_num;
+        self.symtab_num += 1;
+        if let Some(section_index) = section_index {
+            if section_index.0 >= elf::SHN_LORESERVE.into() {
+                self.need_symtab_shndx = true;
+            }
+        }
+        SymbolIndex(index)
+    }
+
+    /// Return the number of reserved symbol table entries.
+    ///
+    /// Includes the null symbol.
+    pub fn symbol_count(&self) -> u32 {
+        self.symtab_num
+    }
+
+    fn symbol_size(&self) -> usize {
+        if self.is_64 {
+            mem::size_of::<elf::Sym64<Endianness>>()
+        } else {
+            mem::size_of::<elf::Sym32<Endianness>>()
+        }
+    }
+
+    /// Reserve the range for the symbol table.
+    ///
+    /// This range is used for a section named `.symtab`.
+    /// This function does nothing if no symbols were reserved.
+    /// This must be called after [`Self::reserve_symbol_index`].
+    pub fn reserve_symtab(&mut self) {
+        debug_assert_eq!(self.symtab_offset, 0);
+        if self.symtab_num == 0 {
+            return;
+        }
+        self.symtab_offset = self.reserve(
+            self.symtab_num as usize * self.symbol_size(),
+            self.elf_align,
+        );
+    }
+
+    /// Write the null symbol.
+    ///
+    /// This must be the first symbol that is written.
+    /// This function does nothing if no symbols were reserved.
+    pub fn write_null_symbol(&mut self) {
+        if self.symtab_num == 0 {
+            return;
+        }
+        util::write_align(self.buffer, self.elf_align);
+        debug_assert_eq!(self.symtab_offset, self.buffer.len());
+        if self.is_64 {
+            self.buffer.write(&elf::Sym64::<Endianness>::default());
+        } else {
+            self.buffer.write(&elf::Sym32::<Endianness>::default());
+        }
+
+        if self.need_symtab_shndx {
+            self.symtab_shndx_data.write_pod(&U32::new(self.endian, 0));
+        }
+    }
+
+    /// Write a symbol.
+    pub fn write_symbol(&mut self, sym: &Sym) {
+        let st_name = if let Some(name) = sym.name {
+            self.strtab.get_offset(name) as u32
+        } else {
+            0
+        };
+        let st_shndx = if let Some(section) = sym.section {
+            if section.0 >= elf::SHN_LORESERVE as u32 {
+                elf::SHN_XINDEX
+            } else {
+                section.0 as u16
+            }
+        } else {
+            sym.st_shndx
+        };
+
+        let endian = self.endian;
+        if self.is_64 {
+            let sym = elf::Sym64 {
+                st_name: U32::new(endian, st_name),
+                st_info: sym.st_info,
+                st_other: sym.st_other,
+                st_shndx: U16::new(endian, st_shndx),
+                st_value: U64::new(endian, sym.st_value),
+                st_size: U64::new(endian, sym.st_size),
+            };
+            self.buffer.write(&sym);
+        } else {
+            let sym = elf::Sym32 {
+                st_name: U32::new(endian, st_name),
+                st_info: sym.st_info,
+                st_other: sym.st_other,
+                st_shndx: U16::new(endian, st_shndx),
+                st_value: U32::new(endian, sym.st_value as u32),
+                st_size: U32::new(endian, sym.st_size as u32),
+            };
+            self.buffer.write(&sym);
+        }
+
+        if self.need_symtab_shndx {
+            let section_index = sym.section.unwrap_or(SectionIndex(0));
+            self.symtab_shndx_data
+                .write_pod(&U32::new(self.endian, section_index.0));
+        }
+    }
+
+    /// Reserve the section index for the symbol table.
+    ///
+    /// This must be called before [`Self::reserve_section_headers`].
+    pub fn reserve_symtab_section_index(&mut self) -> SectionIndex {
+        debug_assert_eq!(self.symtab_index, SectionIndex(0));
+        self.symtab_str_id = Some(self.add_section_name(&b".symtab"[..]));
+        self.symtab_index = self.reserve_section_index();
+        self.symtab_index
+    }
+
+    /// Return the section index of the symbol table.
+    pub fn symtab_index(&mut self) -> SectionIndex {
+        self.symtab_index
+    }
+
+    /// Write the section header for the symbol table.
+    ///
+    /// This function does nothing if the section index was not reserved.
+    pub fn write_symtab_section_header(&mut self, num_local: u32) {
+        if self.symtab_index == SectionIndex(0) {
+            return;
+        }
+        self.write_section_header(&SectionHeader {
+            name: self.symtab_str_id,
+            sh_type: elf::SHT_SYMTAB,
+            sh_flags: 0,
+            sh_addr: 0,
+            sh_offset: self.symtab_offset as u64,
+            sh_size: self.symtab_num as u64 * self.symbol_size() as u64,
+            sh_link: self.strtab_index.0,
+            sh_info: num_local,
+            sh_addralign: self.elf_align as u64,
+            sh_entsize: self.symbol_size() as u64,
+        });
+    }
+
+    /// Return true if `.symtab_shndx` is needed.
+    pub fn symtab_shndx_needed(&self) -> bool {
+        self.need_symtab_shndx
+    }
+
+    /// Reserve the range for the extended section indices for the symbol table.
+    ///
+    /// This range is used for a section named `.symtab_shndx`.
+    /// This also reserves a section index.
+    ///
+    /// This function does nothing if extended section indices are not needed.
+    /// This must be called after [`Self::reserve_symbol_index`].
+    pub fn reserve_symtab_shndx(&mut self) {
+        debug_assert_eq!(self.symtab_shndx_offset, 0);
+        if !self.need_symtab_shndx {
+            return;
+        }
+        self.symtab_shndx_offset = self.reserve(self.symtab_num as usize * 4, 4);
+        self.symtab_shndx_data.reserve(self.symtab_num as usize * 4);
+    }
+
+    /// Write the extended section indices for the symbol table.
+    ///
+    /// This function does nothing if the section was not reserved.
+    pub fn write_symtab_shndx(&mut self) {
+        if self.symtab_shndx_offset == 0 {
+            return;
+        }
+        debug_assert_eq!(self.symtab_shndx_offset, self.buffer.len());
+        debug_assert_eq!(self.symtab_num as usize * 4, self.symtab_shndx_data.len());
+        self.buffer.write_bytes(&self.symtab_shndx_data);
+    }
+
+    /// Reserve the section index for the extended section indices symbol table.
+    ///
+    /// You should check [`Self::symtab_shndx_needed`] before calling this
+    /// unless you have other means of knowing if this section is needed.
+    ///
+    /// This must be called before [`Self::reserve_section_headers`].
+    pub fn reserve_symtab_shndx_section_index(&mut self) -> SectionIndex {
+        debug_assert!(self.symtab_shndx_str_id.is_none());
+        self.symtab_shndx_str_id = Some(self.add_section_name(&b".symtab_shndx"[..]));
+        self.reserve_section_index()
+    }
+
+    /// Write the section header for the extended section indices for the symbol table.
+    ///
+    /// This function does nothing if the section index was not reserved.
+    pub fn write_symtab_shndx_section_header(&mut self) {
+        if self.symtab_shndx_str_id.is_none() {
+            return;
+        }
+        let sh_size = if self.symtab_shndx_offset == 0 {
+            0
+        } else {
+            (self.symtab_num * 4) as u64
+        };
+        self.write_section_header(&SectionHeader {
+            name: self.symtab_shndx_str_id,
+            sh_type: elf::SHT_SYMTAB_SHNDX,
+            sh_flags: 0,
+            sh_addr: 0,
+            sh_offset: self.symtab_shndx_offset as u64,
+            sh_size,
+            sh_link: self.symtab_index.0,
+            sh_info: 0,
+            sh_addralign: 4,
+            sh_entsize: 4,
+        });
+    }
+
+    /// Add a string to the dynamic string table.
+    ///
+    /// This will be stored in the `.dynstr` section.
+    ///
+    /// This must be called before [`Self::reserve_dynstr`].
+    pub fn add_dynamic_string(&mut self, name: &'a [u8]) -> StringId {
+        debug_assert_eq!(self.dynstr_offset, 0);
+        self.need_dynstr = true;
+        self.dynstr.add(name)
+    }
+
+    /// Get a string that was previously added to the dynamic string table.
+    ///
+    /// Panics if the string was not added.
+    pub fn get_dynamic_string(&self, name: &'a [u8]) -> StringId {
+        self.dynstr.get_id(name)
+    }
+
+    /// Return true if `.dynstr` is needed.
+    pub fn dynstr_needed(&self) -> bool {
+        self.need_dynstr
+    }
+
+    /// Reserve the range for the dynamic string table.
+    ///
+    /// This range is used for a section named `.dynstr`.
+    ///
+    /// This function does nothing if no dynamic strings or symbols were defined.
+    /// This must be called after [`Self::add_dynamic_string`].
+    pub fn reserve_dynstr(&mut self) {
+        debug_assert_eq!(self.dynstr_offset, 0);
+        if !self.need_dynstr {
+            return;
+        }
+        // Start with null string.
+        self.dynstr_data = vec![0];
+        self.dynstr.write(1, &mut self.dynstr_data);
+        self.dynstr_offset = self.reserve(self.dynstr_data.len(), 1);
+    }
+
+    /// Write the dynamic string table.
+    ///
+    /// This function does nothing if the section was not reserved.
+    pub fn write_dynstr(&mut self) {
+        if self.dynstr_offset == 0 {
+            return;
+        }
+        debug_assert_eq!(self.dynstr_offset, self.buffer.len());
+        self.buffer.write_bytes(&self.dynstr_data);
+    }
+
+    /// Reserve the section index for the dynamic string table.
+    ///
+    /// This must be called before [`Self::reserve_section_headers`].
+    pub fn reserve_dynstr_section_index(&mut self) -> SectionIndex {
+        debug_assert_eq!(self.dynstr_index, SectionIndex(0));
+        self.dynstr_str_id = Some(self.add_section_name(&b".dynstr"[..]));
+        self.dynstr_index = self.reserve_section_index();
+        self.dynstr_index
+    }
+
+    /// Return the section index of the dynamic string table.
+    pub fn dynstr_index(&mut self) -> SectionIndex {
+        self.dynstr_index
+    }
+
+    /// Write the section header for the dynamic string table.
+    ///
+    /// This function does nothing if the section index was not reserved.
+    pub fn write_dynstr_section_header(&mut self, sh_addr: u64) {
+        if self.dynstr_index == SectionIndex(0) {
+            return;
+        }
+        self.write_section_header(&SectionHeader {
+            name: self.dynstr_str_id,
+            sh_type: elf::SHT_STRTAB,
+            sh_flags: elf::SHF_ALLOC.into(),
+            sh_addr,
+            sh_offset: self.dynstr_offset as u64,
+            sh_size: self.dynstr_data.len() as u64,
+            sh_link: 0,
+            sh_info: 0,
+            sh_addralign: 1,
+            sh_entsize: 0,
+        });
+    }
+
+    /// Reserve the null dynamic symbol table entry.
+    ///
+    /// This will be stored in the `.dynsym` section.
+    ///
+    /// The null dynamic symbol table entry is usually automatically reserved,
+    /// but this can be used to force an empty dynamic symbol table.
+    ///
+    /// This must be called before [`Self::reserve_dynsym`].
+    pub fn reserve_null_dynamic_symbol_index(&mut self) -> SymbolIndex {
+        debug_assert_eq!(self.dynsym_offset, 0);
+        debug_assert_eq!(self.dynsym_num, 0);
+        self.dynsym_num = 1;
+        // The symtab must link to a strtab.
+        self.need_dynstr = true;
+        SymbolIndex(0)
+    }
+
+    /// Reserve a dynamic symbol table entry.
+    ///
+    /// This will be stored in the `.dynsym` section.
+    ///
+    /// Automatically also reserves the null symbol if required.
+    /// Callers may assume that the returned indices will be sequential
+    /// starting at 1.
+    ///
+    /// This must be called before [`Self::reserve_dynsym`].
+    pub fn reserve_dynamic_symbol_index(&mut self) -> SymbolIndex {
+        debug_assert_eq!(self.dynsym_offset, 0);
+        if self.dynsym_num == 0 {
+            self.dynsym_num = 1;
+            // The symtab must link to a strtab.
+            self.need_dynstr = true;
+        }
+        let index = self.dynsym_num;
+        self.dynsym_num += 1;
+        SymbolIndex(index)
+    }
+
+    /// Return the number of reserved dynamic symbols.
+    ///
+    /// Includes the null symbol.
+    pub fn dynamic_symbol_count(&mut self) -> u32 {
+        self.dynsym_num
+    }
+
+    /// Reserve the range for the dynamic symbol table.
+    ///
+    /// This range is used for a section named `.dynsym`.
+    ///
+    /// This function does nothing if no dynamic symbols were reserved.
+    /// This must be called after [`Self::reserve_dynamic_symbol_index`].
+    pub fn reserve_dynsym(&mut self) {
+        debug_assert_eq!(self.dynsym_offset, 0);
+        if self.dynsym_num == 0 {
+            return;
+        }
+        self.dynsym_offset = self.reserve(
+            self.dynsym_num as usize * self.symbol_size(),
+            self.elf_align,
+        );
+    }
+
+    /// Write the null dynamic symbol.
+    ///
+    /// This must be the first dynamic symbol that is written.
+    /// This function does nothing if no dynamic symbols were reserved.
+    pub fn write_null_dynamic_symbol(&mut self) {
+        if self.dynsym_num == 0 {
+            return;
+        }
+        util::write_align(self.buffer, self.elf_align);
+        debug_assert_eq!(self.dynsym_offset, self.buffer.len());
+        if self.is_64 {
+            self.buffer.write(&elf::Sym64::<Endianness>::default());
+        } else {
+            self.buffer.write(&elf::Sym32::<Endianness>::default());
+        }
+    }
+
+    /// Write a dynamic symbol.
+    pub fn write_dynamic_symbol(&mut self, sym: &Sym) {
+        let st_name = if let Some(name) = sym.name {
+            self.dynstr.get_offset(name) as u32
+        } else {
+            0
+        };
+
+        let st_shndx = if let Some(section) = sym.section {
+            if section.0 >= elf::SHN_LORESERVE as u32 {
+                // TODO: we don't actually write out .dynsym_shndx yet.
+                // This is unlikely to be needed though.
+                elf::SHN_XINDEX
+            } else {
+                section.0 as u16
+            }
+        } else {
+            sym.st_shndx
+        };
+
+        let endian = self.endian;
+        if self.is_64 {
+            let sym = elf::Sym64 {
+                st_name: U32::new(endian, st_name),
+                st_info: sym.st_info,
+                st_other: sym.st_other,
+                st_shndx: U16::new(endian, st_shndx),
+                st_value: U64::new(endian, sym.st_value),
+                st_size: U64::new(endian, sym.st_size),
+            };
+            self.buffer.write(&sym);
+        } else {
+            let sym = elf::Sym32 {
+                st_name: U32::new(endian, st_name),
+                st_info: sym.st_info,
+                st_other: sym.st_other,
+                st_shndx: U16::new(endian, st_shndx),
+                st_value: U32::new(endian, sym.st_value as u32),
+                st_size: U32::new(endian, sym.st_size as u32),
+            };
+            self.buffer.write(&sym);
+        }
+    }
+
+    /// Reserve the section index for the dynamic symbol table.
+    ///
+    /// This must be called before [`Self::reserve_section_headers`].
+    pub fn reserve_dynsym_section_index(&mut self) -> SectionIndex {
+        debug_assert_eq!(self.dynsym_index, SectionIndex(0));
+        self.dynsym_str_id = Some(self.add_section_name(&b".dynsym"[..]));
+        self.dynsym_index = self.reserve_section_index();
+        self.dynsym_index
+    }
+
+    /// Return the section index of the dynamic symbol table.
+    pub fn dynsym_index(&mut self) -> SectionIndex {
+        self.dynsym_index
+    }
+
+    /// Write the section header for the dynamic symbol table.
+    ///
+    /// This function does nothing if the section index was not reserved.
+    pub fn write_dynsym_section_header(&mut self, sh_addr: u64, num_local: u32) {
+        if self.dynsym_index == SectionIndex(0) {
+            return;
+        }
+        self.write_section_header(&SectionHeader {
+            name: self.dynsym_str_id,
+            sh_type: elf::SHT_DYNSYM,
+            sh_flags: elf::SHF_ALLOC.into(),
+            sh_addr,
+            sh_offset: self.dynsym_offset as u64,
+            sh_size: self.dynsym_num as u64 * self.symbol_size() as u64,
+            sh_link: self.dynstr_index.0,
+            sh_info: num_local,
+            sh_addralign: self.elf_align as u64,
+            sh_entsize: self.symbol_size() as u64,
+        });
+    }
+
+    fn dyn_size(&self) -> usize {
+        if self.is_64 {
+            mem::size_of::<elf::Dyn64<Endianness>>()
+        } else {
+            mem::size_of::<elf::Dyn32<Endianness>>()
+        }
+    }
+
+    /// Reserve the range for the `.dynamic` section.
+    ///
+    /// This function does nothing if `dynamic_num` is zero.
+    pub fn reserve_dynamic(&mut self, dynamic_num: usize) {
+        debug_assert_eq!(self.dynamic_offset, 0);
+        if dynamic_num == 0 {
+            return;
+        }
+        self.dynamic_num = dynamic_num;
+        self.dynamic_offset = self.reserve(dynamic_num * self.dyn_size(), self.elf_align);
+    }
+
+    /// Write alignment padding bytes prior to the `.dynamic` section.
+    ///
+    /// This function does nothing if the section was not reserved.
+    pub fn write_align_dynamic(&mut self) {
+        if self.dynamic_offset == 0 {
+            return;
+        }
+        util::write_align(self.buffer, self.elf_align);
+        debug_assert_eq!(self.dynamic_offset, self.buffer.len());
+    }
+
+    /// Write a dynamic string entry.
+    pub fn write_dynamic_string(&mut self, tag: u32, id: StringId) {
+        self.write_dynamic(tag, self.dynstr.get_offset(id) as u64);
+    }
+
+    /// Write a dynamic value entry.
+    pub fn write_dynamic(&mut self, d_tag: u32, d_val: u64) {
+        debug_assert!(self.dynamic_offset <= self.buffer.len());
+        let endian = self.endian;
+        if self.is_64 {
+            let d = elf::Dyn64 {
+                d_tag: U64::new(endian, d_tag.into()),
+                d_val: U64::new(endian, d_val),
+            };
+            self.buffer.write(&d);
+        } else {
+            let d = elf::Dyn32 {
+                d_tag: U32::new(endian, d_tag),
+                d_val: U32::new(endian, d_val as u32),
+            };
+            self.buffer.write(&d);
+        }
+        debug_assert!(
+            self.dynamic_offset + self.dynamic_num * self.dyn_size() >= self.buffer.len()
+        );
+    }
+
+    /// Reserve the section index for the dynamic table.
+    pub fn reserve_dynamic_section_index(&mut self) -> SectionIndex {
+        debug_assert!(self.dynamic_str_id.is_none());
+        self.dynamic_str_id = Some(self.add_section_name(&b".dynamic"[..]));
+        self.reserve_section_index()
+    }
+
+    /// Write the section header for the dynamic table.
+    ///
+    /// This function does nothing if the section index was not reserved.
+    pub fn write_dynamic_section_header(&mut self, sh_addr: u64) {
+        if self.dynamic_str_id.is_none() {
+            return;
+        }
+        self.write_section_header(&SectionHeader {
+            name: self.dynamic_str_id,
+            sh_type: elf::SHT_DYNAMIC,
+            sh_flags: (elf::SHF_WRITE | elf::SHF_ALLOC).into(),
+            sh_addr,
+            sh_offset: self.dynamic_offset as u64,
+            sh_size: (self.dynamic_num * self.dyn_size()) as u64,
+            sh_link: self.dynstr_index.0,
+            sh_info: 0,
+            sh_addralign: self.elf_align as u64,
+            sh_entsize: self.dyn_size() as u64,
+        });
+    }
+
+    fn rel_size(&self, is_rela: bool) -> usize {
+        if self.is_64 {
+            if is_rela {
+                mem::size_of::<elf::Rela64<Endianness>>()
+            } else {
+                mem::size_of::<elf::Rel64<Endianness>>()
+            }
+        } else {
+            if is_rela {
+                mem::size_of::<elf::Rela32<Endianness>>()
+            } else {
+                mem::size_of::<elf::Rel32<Endianness>>()
+            }
+        }
+    }
+
+    /// Reserve a file range for a SysV hash section.
+    ///
+    /// `symbol_count` is the number of symbols in the hash,
+    /// not the total number of symbols.
+    pub fn reserve_hash(&mut self, bucket_count: u32, chain_count: u32) {
+        self.hash_size = mem::size_of::<elf::HashHeader<Endianness>>()
+            + bucket_count as usize * 4
+            + chain_count as usize * 4;
+        self.hash_offset = self.reserve(self.hash_size, self.elf_align);
+    }
+
+    /// Write a SysV hash section.
+    ///
+    /// `chain_count` is the number of symbols in the hash.
+    /// The argument to `hash` will be in the range `0..chain_count`.
+    pub fn write_hash<F>(&mut self, bucket_count: u32, chain_count: u32, hash: F)
+    where
+        F: Fn(u32) -> Option<u32>,
+    {
+        let mut buckets = vec![U32::new(self.endian, 0); bucket_count as usize];
+        let mut chains = vec![U32::new(self.endian, 0); chain_count as usize];
+        for i in 0..chain_count {
+            if let Some(hash) = hash(i) {
+                let bucket = hash % bucket_count;
+                chains[i as usize] = buckets[bucket as usize];
+                buckets[bucket as usize] = U32::new(self.endian, i);
+            }
+        }
+
+        util::write_align(self.buffer, self.elf_align);
+        debug_assert_eq!(self.hash_offset, self.buffer.len());
+        self.buffer.write(&elf::HashHeader {
+            bucket_count: U32::new(self.endian, bucket_count),
+            chain_count: U32::new(self.endian, chain_count),
+        });
+        self.buffer.write_slice(&buckets);
+        self.buffer.write_slice(&chains);
+    }
+
+    /// Reserve the section index for the SysV hash table.
+    pub fn reserve_hash_section_index(&mut self) -> SectionIndex {
+        debug_assert!(self.hash_str_id.is_none());
+        self.hash_str_id = Some(self.add_section_name(&b".hash"[..]));
+        self.reserve_section_index()
+    }
+
+    /// Write the section header for the SysV hash table.
+    ///
+    /// This function does nothing if the section index was not reserved.
+    pub fn write_hash_section_header(&mut self, sh_addr: u64) {
+        if self.hash_str_id.is_none() {
+            return;
+        }
+        self.write_section_header(&SectionHeader {
+            name: self.hash_str_id,
+            sh_type: elf::SHT_HASH,
+            sh_flags: elf::SHF_ALLOC.into(),
+            sh_addr,
+            sh_offset: self.hash_offset as u64,
+            sh_size: self.hash_size as u64,
+            sh_link: self.dynsym_index.0,
+            sh_info: 0,
+            sh_addralign: self.elf_align as u64,
+            sh_entsize: 4,
+        });
+    }
+
+    /// Reserve a file range for a GNU hash section.
+    ///
+    /// `symbol_count` is the number of symbols in the hash,
+    /// not the total number of symbols.
+    pub fn reserve_gnu_hash(&mut self, bloom_count: u32, bucket_count: u32, symbol_count: u32) {
+        self.gnu_hash_size = mem::size_of::<elf::GnuHashHeader<Endianness>>()
+            + bloom_count as usize * self.elf_align
+            + bucket_count as usize * 4
+            + symbol_count as usize * 4;
+        self.gnu_hash_offset = self.reserve(self.gnu_hash_size, self.elf_align);
+    }
+
+    /// Write a GNU hash section.
+    ///
+    /// `symbol_count` is the number of symbols in the hash.
+    /// The argument to `hash` will be in the range `0..symbol_count`.
+    ///
+    /// This requires that symbols are already sorted by bucket.
+    pub fn write_gnu_hash<F>(
+        &mut self,
+        symbol_base: u32,
+        bloom_shift: u32,
+        bloom_count: u32,
+        bucket_count: u32,
+        symbol_count: u32,
+        hash: F,
+    ) where
+        F: Fn(u32) -> u32,
+    {
+        util::write_align(self.buffer, self.elf_align);
+        debug_assert_eq!(self.gnu_hash_offset, self.buffer.len());
+        self.buffer.write(&elf::GnuHashHeader {
+            bucket_count: U32::new(self.endian, bucket_count),
+            symbol_base: U32::new(self.endian, symbol_base),
+            bloom_count: U32::new(self.endian, bloom_count),
+            bloom_shift: U32::new(self.endian, bloom_shift),
+        });
+
+        // Calculate and write bloom filter.
+        if self.is_64 {
+            let mut bloom_filters = vec![0; bloom_count as usize];
+            for i in 0..symbol_count {
+                let h = hash(i);
+                bloom_filters[((h / 64) & (bloom_count - 1)) as usize] |=
+                    1 << (h % 64) | 1 << ((h >> bloom_shift) % 64);
+            }
+            for bloom_filter in bloom_filters {
+                self.buffer.write(&U64::new(self.endian, bloom_filter));
+            }
+        } else {
+            let mut bloom_filters = vec![0; bloom_count as usize];
+            for i in 0..symbol_count {
+                let h = hash(i);
+                bloom_filters[((h / 32) & (bloom_count - 1)) as usize] |=
+                    1 << (h % 32) | 1 << ((h >> bloom_shift) % 32);
+            }
+            for bloom_filter in bloom_filters {
+                self.buffer.write(&U32::new(self.endian, bloom_filter));
+            }
+        }
+
+        // Write buckets.
+        //
+        // This requires that symbols are already sorted by bucket.
+        let mut bucket = 0;
+        for i in 0..symbol_count {
+            let symbol_bucket = hash(i) % bucket_count;
+            while bucket < symbol_bucket {
+                self.buffer.write(&U32::new(self.endian, 0));
+                bucket += 1;
+            }
+            if bucket == symbol_bucket {
+                self.buffer.write(&U32::new(self.endian, symbol_base + i));
+                bucket += 1;
+            }
+        }
+        while bucket < bucket_count {
+            self.buffer.write(&U32::new(self.endian, 0));
+            bucket += 1;
+        }
+
+        // Write hash values.
+        for i in 0..symbol_count {
+            let mut h = hash(i);
+            if i == symbol_count - 1 || h % bucket_count != hash(i + 1) % bucket_count {
+                h |= 1;
+            } else {
+                h &= !1;
+            }
+            self.buffer.write(&U32::new(self.endian, h));
+        }
+    }
+
+    /// Reserve the section index for the GNU hash table.
+    pub fn reserve_gnu_hash_section_index(&mut self) -> SectionIndex {
+        debug_assert!(self.gnu_hash_str_id.is_none());
+        self.gnu_hash_str_id = Some(self.add_section_name(&b".gnu.hash"[..]));
+        self.reserve_section_index()
+    }
+
+    /// Write the section header for the GNU hash table.
+    ///
+    /// This function does nothing if the section index was not reserved.
+    pub fn write_gnu_hash_section_header(&mut self, sh_addr: u64) {
+        if self.gnu_hash_str_id.is_none() {
+            return;
+        }
+        self.write_section_header(&SectionHeader {
+            name: self.gnu_hash_str_id,
+            sh_type: elf::SHT_GNU_HASH,
+            sh_flags: elf::SHF_ALLOC.into(),
+            sh_addr,
+            sh_offset: self.gnu_hash_offset as u64,
+            sh_size: self.gnu_hash_size as u64,
+            sh_link: self.dynsym_index.0,
+            sh_info: 0,
+            sh_addralign: self.elf_align as u64,
+            sh_entsize: 0,
+        });
+    }
+
+    /// Reserve the range for the `.gnu.version` section.
+    ///
+    /// This function does nothing if no dynamic symbols were reserved.
+    pub fn reserve_gnu_versym(&mut self) {
+        debug_assert_eq!(self.gnu_versym_offset, 0);
+        if self.dynsym_num == 0 {
+            return;
+        }
+        self.gnu_versym_offset = self.reserve(self.dynsym_num as usize * 2, 2);
+    }
+
+    /// Write the null symbol version entry.
+    ///
+    /// This must be the first symbol version that is written.
+    /// This function does nothing if no dynamic symbols were reserved.
+    pub fn write_null_gnu_versym(&mut self) {
+        if self.dynsym_num == 0 {
+            return;
+        }
+        util::write_align(self.buffer, 2);
+        debug_assert_eq!(self.gnu_versym_offset, self.buffer.len());
+        self.write_gnu_versym(0);
+    }
+
+    /// Write a symbol version entry.
+    pub fn write_gnu_versym(&mut self, versym: u16) {
+        self.buffer.write(&U16::new(self.endian, versym));
+    }
+
+    /// Reserve the section index for the `.gnu.version` section.
+    pub fn reserve_gnu_versym_section_index(&mut self) -> SectionIndex {
+        debug_assert!(self.gnu_versym_str_id.is_none());
+        self.gnu_versym_str_id = Some(self.add_section_name(&b".gnu.version"[..]));
+        self.reserve_section_index()
+    }
+
+    /// Write the section header for the `.gnu.version` section.
+    ///
+    /// This function does nothing if the section index was not reserved.
+    pub fn write_gnu_versym_section_header(&mut self, sh_addr: u64) {
+        if self.gnu_versym_str_id.is_none() {
+            return;
+        }
+        self.write_section_header(&SectionHeader {
+            name: self.gnu_versym_str_id,
+            sh_type: elf::SHT_GNU_VERSYM,
+            sh_flags: elf::SHF_ALLOC.into(),
+            sh_addr,
+            sh_offset: self.gnu_versym_offset as u64,
+            sh_size: self.dynsym_num as u64 * 2,
+            sh_link: self.dynsym_index.0,
+            sh_info: 0,
+            sh_addralign: 2,
+            sh_entsize: 2,
+        });
+    }
+
+    /// Reserve the range for the `.gnu.version_d` section.
+    pub fn reserve_gnu_verdef(&mut self, verdef_count: usize, verdaux_count: usize) {
+        debug_assert_eq!(self.gnu_verdef_offset, 0);
+        if verdef_count == 0 {
+            return;
+        }
+        self.gnu_verdef_size = verdef_count * mem::size_of::<elf::Verdef<Endianness>>()
+            + verdaux_count * mem::size_of::<elf::Verdaux<Endianness>>();
+        self.gnu_verdef_offset = self.reserve(self.gnu_verdef_size, self.elf_align);
+        self.gnu_verdef_count = verdef_count as u16;
+        self.gnu_verdef_remaining = self.gnu_verdef_count;
+    }
+
+    /// Write alignment padding bytes prior to a `.gnu.version_d` section.
+    pub fn write_align_gnu_verdef(&mut self) {
+        if self.gnu_verdef_offset == 0 {
+            return;
+        }
+        util::write_align(self.buffer, self.elf_align);
+        debug_assert_eq!(self.gnu_verdef_offset, self.buffer.len());
+    }
+
+    /// Write a version definition entry.
+    pub fn write_gnu_verdef(&mut self, verdef: &Verdef) {
+        debug_assert_ne!(self.gnu_verdef_remaining, 0);
+        self.gnu_verdef_remaining -= 1;
+        let vd_next = if self.gnu_verdef_remaining == 0 {
+            0
+        } else {
+            mem::size_of::<elf::Verdef<Endianness>>() as u32
+                + verdef.aux_count as u32 * mem::size_of::<elf::Verdaux<Endianness>>() as u32
+        };
+
+        self.gnu_verdaux_remaining = verdef.aux_count;
+        let vd_aux = if verdef.aux_count == 0 {
+            0
+        } else {
+            mem::size_of::<elf::Verdef<Endianness>>() as u32
+        };
+
+        self.buffer.write(&elf::Verdef {
+            vd_version: U16::new(self.endian, verdef.version),
+            vd_flags: U16::new(self.endian, verdef.flags),
+            vd_ndx: U16::new(self.endian, verdef.index),
+            vd_cnt: U16::new(self.endian, verdef.aux_count),
+            vd_hash: U32::new(self.endian, elf::hash(self.dynstr.get_string(verdef.name))),
+            vd_aux: U32::new(self.endian, vd_aux),
+            vd_next: U32::new(self.endian, vd_next),
+        });
+        self.write_gnu_verdaux(verdef.name);
+    }
+
+    /// Write a version definition auxiliary entry.
+    pub fn write_gnu_verdaux(&mut self, name: StringId) {
+        debug_assert_ne!(self.gnu_verdaux_remaining, 0);
+        self.gnu_verdaux_remaining -= 1;
+        let vda_next = if self.gnu_verdaux_remaining == 0 {
+            0
+        } else {
+            mem::size_of::<elf::Verdaux<Endianness>>() as u32
+        };
+        self.buffer.write(&elf::Verdaux {
+            vda_name: U32::new(self.endian, self.dynstr.get_offset(name) as u32),
+            vda_next: U32::new(self.endian, vda_next),
+        });
+    }
+
+    /// Reserve the section index for the `.gnu.version_d` section.
+    pub fn reserve_gnu_verdef_section_index(&mut self) -> SectionIndex {
+        debug_assert!(self.gnu_verdef_str_id.is_none());
+        self.gnu_verdef_str_id = Some(self.add_section_name(&b".gnu.version_d"[..]));
+        self.reserve_section_index()
+    }
+
+    /// Write the section header for the `.gnu.version_d` section.
+    ///
+    /// This function does nothing if the section index was not reserved.
+    pub fn write_gnu_verdef_section_header(&mut self, sh_addr: u64) {
+        if self.gnu_verdef_str_id.is_none() {
+            return;
+        }
+        self.write_section_header(&SectionHeader {
+            name: self.gnu_verdef_str_id,
+            sh_type: elf::SHT_GNU_VERDEF,
+            sh_flags: elf::SHF_ALLOC.into(),
+            sh_addr,
+            sh_offset: self.gnu_verdef_offset as u64,
+            sh_size: self.gnu_verdef_size as u64,
+            sh_link: self.dynstr_index.0,
+            sh_info: self.gnu_verdef_count.into(),
+            sh_addralign: self.elf_align as u64,
+            sh_entsize: 0,
+        });
+    }
+
+    /// Reserve the range for the `.gnu.version_r` section.
+    pub fn reserve_gnu_verneed(&mut self, verneed_count: usize, vernaux_count: usize) {
+        debug_assert_eq!(self.gnu_verneed_offset, 0);
+        if verneed_count == 0 {
+            return;
+        }
+        self.gnu_verneed_size = verneed_count * mem::size_of::<elf::Verneed<Endianness>>()
+            + vernaux_count * mem::size_of::<elf::Vernaux<Endianness>>();
+        self.gnu_verneed_offset = self.reserve(self.gnu_verneed_size, self.elf_align);
+        self.gnu_verneed_count = verneed_count as u16;
+        self.gnu_verneed_remaining = self.gnu_verneed_count;
+    }
+
+    /// Write alignment padding bytes prior to a `.gnu.version_r` section.
+    pub fn write_align_gnu_verneed(&mut self) {
+        if self.gnu_verneed_offset == 0 {
+            return;
+        }
+        util::write_align(self.buffer, self.elf_align);
+        debug_assert_eq!(self.gnu_verneed_offset, self.buffer.len());
+    }
+
+    /// Write a version need entry.
+    pub fn write_gnu_verneed(&mut self, verneed: &Verneed) {
+        debug_assert_ne!(self.gnu_verneed_remaining, 0);
+        self.gnu_verneed_remaining -= 1;
+        let vn_next = if self.gnu_verneed_remaining == 0 {
+            0
+        } else {
+            mem::size_of::<elf::Verneed<Endianness>>() as u32
+                + verneed.aux_count as u32 * mem::size_of::<elf::Vernaux<Endianness>>() as u32
+        };
+
+        self.gnu_vernaux_remaining = verneed.aux_count;
+        let vn_aux = if verneed.aux_count == 0 {
+            0
+        } else {
+            mem::size_of::<elf::Verneed<Endianness>>() as u32
+        };
+
+        self.buffer.write(&elf::Verneed {
+            vn_version: U16::new(self.endian, verneed.version),
+            vn_cnt: U16::new(self.endian, verneed.aux_count),
+            vn_file: U32::new(self.endian, self.dynstr.get_offset(verneed.file) as u32),
+            vn_aux: U32::new(self.endian, vn_aux),
+            vn_next: U32::new(self.endian, vn_next),
+        });
+    }
+
+    /// Write a version need auxiliary entry.
+    pub fn write_gnu_vernaux(&mut self, vernaux: &Vernaux) {
+        debug_assert_ne!(self.gnu_vernaux_remaining, 0);
+        self.gnu_vernaux_remaining -= 1;
+        let vna_next = if self.gnu_vernaux_remaining == 0 {
+            0
+        } else {
+            mem::size_of::<elf::Vernaux<Endianness>>() as u32
+        };
+        self.buffer.write(&elf::Vernaux {
+            vna_hash: U32::new(self.endian, elf::hash(self.dynstr.get_string(vernaux.name))),
+            vna_flags: U16::new(self.endian, vernaux.flags),
+            vna_other: U16::new(self.endian, vernaux.index),
+            vna_name: U32::new(self.endian, self.dynstr.get_offset(vernaux.name) as u32),
+            vna_next: U32::new(self.endian, vna_next),
+        });
+    }
+
+    /// Reserve the section index for the `.gnu.version_r` section.
+    pub fn reserve_gnu_verneed_section_index(&mut self) -> SectionIndex {
+        debug_assert!(self.gnu_verneed_str_id.is_none());
+        self.gnu_verneed_str_id = Some(self.add_section_name(&b".gnu.version_r"[..]));
+        self.reserve_section_index()
+    }
+
+    /// Write the section header for the `.gnu.version_r` section.
+    ///
+    /// This function does nothing if the section index was not reserved.
+    pub fn write_gnu_verneed_section_header(&mut self, sh_addr: u64) {
+        if self.gnu_verneed_str_id.is_none() {
+            return;
+        }
+        self.write_section_header(&SectionHeader {
+            name: self.gnu_verneed_str_id,
+            sh_type: elf::SHT_GNU_VERNEED,
+            sh_flags: elf::SHF_ALLOC.into(),
+            sh_addr,
+            sh_offset: self.gnu_verneed_offset as u64,
+            sh_size: self.gnu_verneed_size as u64,
+            sh_link: self.dynstr_index.0,
+            sh_info: self.gnu_verneed_count.into(),
+            sh_addralign: self.elf_align as u64,
+            sh_entsize: 0,
+        });
+    }
+
+    /// Reserve a file range for the given number of relocations.
+    ///
+    /// Returns the offset of the range.
+    pub fn reserve_relocations(&mut self, count: usize, is_rela: bool) -> usize {
+        self.reserve(count * self.rel_size(is_rela), self.elf_align)
+    }
+
+    /// Write alignment padding bytes prior to a relocation section.
+    pub fn write_align_relocation(&mut self) {
+        util::write_align(self.buffer, self.elf_align);
+    }
+
+    /// Write a relocation.
+    pub fn write_relocation(&mut self, is_rela: bool, rel: &Rel) {
+        let endian = self.endian;
+        if self.is_64 {
+            if is_rela {
+                let rel = elf::Rela64 {
+                    r_offset: U64::new(endian, rel.r_offset),
+                    r_info: elf::Rela64::r_info(endian, self.is_mips64el, rel.r_sym, rel.r_type),
+                    r_addend: I64::new(endian, rel.r_addend),
+                };
+                self.buffer.write(&rel);
+            } else {
+                let rel = elf::Rel64 {
+                    r_offset: U64::new(endian, rel.r_offset),
+                    r_info: elf::Rel64::r_info(endian, rel.r_sym, rel.r_type),
+                };
+                self.buffer.write(&rel);
+            }
+        } else {
+            if is_rela {
+                let rel = elf::Rela32 {
+                    r_offset: U32::new(endian, rel.r_offset as u32),
+                    r_info: elf::Rel32::r_info(endian, rel.r_sym, rel.r_type as u8),
+                    r_addend: I32::new(endian, rel.r_addend as i32),
+                };
+                self.buffer.write(&rel);
+            } else {
+                let rel = elf::Rel32 {
+                    r_offset: U32::new(endian, rel.r_offset as u32),
+                    r_info: elf::Rel32::r_info(endian, rel.r_sym, rel.r_type as u8),
+                };
+                self.buffer.write(&rel);
+            }
+        }
+    }
+
+    /// Write the section header for a relocation section.
+    ///
+    /// `section` is the index of the section the relocations apply to,
+    /// or 0 if none.
+    ///
+    /// `symtab` is the index of the symbol table the relocations refer to,
+    /// or 0 if none.
+    ///
+    /// `offset` is the file offset of the relocations.
+    pub fn write_relocation_section_header(
+        &mut self,
+        name: StringId,
+        section: SectionIndex,
+        symtab: SectionIndex,
+        offset: usize,
+        count: usize,
+        is_rela: bool,
+    ) {
+        self.write_section_header(&SectionHeader {
+            name: Some(name),
+            sh_type: if is_rela { elf::SHT_RELA } else { elf::SHT_REL },
+            sh_flags: elf::SHF_INFO_LINK.into(),
+            sh_addr: 0,
+            sh_offset: offset as u64,
+            sh_size: (count * self.rel_size(is_rela)) as u64,
+            sh_link: symtab.0,
+            sh_info: section.0,
+            sh_addralign: self.elf_align as u64,
+            sh_entsize: self.rel_size(is_rela) as u64,
+        });
+    }
+
+    /// Reserve a file range for a COMDAT section.
+    ///
+    /// `count` is the number of sections in the COMDAT group.
+    ///
+    /// Returns the offset of the range.
+    pub fn reserve_comdat(&mut self, count: usize) -> usize {
+        self.reserve((count + 1) * 4, 4)
+    }
+
+    /// Write `GRP_COMDAT` at the start of the COMDAT section.
+    pub fn write_comdat_header(&mut self) {
+        util::write_align(self.buffer, 4);
+        self.buffer.write(&U32::new(self.endian, elf::GRP_COMDAT));
+    }
+
+    /// Write an entry in a COMDAT section.
+    pub fn write_comdat_entry(&mut self, entry: SectionIndex) {
+        self.buffer.write(&U32::new(self.endian, entry.0));
+    }
+
+    /// Write the section header for a COMDAT section.
+    pub fn write_comdat_section_header(
+        &mut self,
+        name: StringId,
+        symtab: SectionIndex,
+        symbol: SymbolIndex,
+        offset: usize,
+        count: usize,
+    ) {
+        self.write_section_header(&SectionHeader {
+            name: Some(name),
+            sh_type: elf::SHT_GROUP,
+            sh_flags: 0,
+            sh_addr: 0,
+            sh_offset: offset as u64,
+            sh_size: ((count + 1) * 4) as u64,
+            sh_link: symtab.0,
+            sh_info: symbol.0,
+            sh_addralign: 4,
+            sh_entsize: 4,
+        });
+    }
+}
+
+/// Native endian version of [`elf::FileHeader64`].
+#[allow(missing_docs)]
+#[derive(Debug, Clone)]
+pub struct FileHeader {
+    pub os_abi: u8,
+    pub abi_version: u8,
+    pub e_type: u16,
+    pub e_machine: u16,
+    pub e_entry: u64,
+    pub e_flags: u32,
+}
+
+/// Native endian version of [`elf::ProgramHeader64`].
+#[allow(missing_docs)]
+#[derive(Debug, Clone)]
+pub struct ProgramHeader {
+    pub p_type: u32,
+    pub p_flags: u32,
+    pub p_offset: u64,
+    pub p_vaddr: u64,
+    pub p_paddr: u64,
+    pub p_filesz: u64,
+    pub p_memsz: u64,
+    pub p_align: u64,
+}
+
+/// Native endian version of [`elf::SectionHeader64`].
+#[allow(missing_docs)]
+#[derive(Debug, Clone)]
+pub struct SectionHeader {
+    pub name: Option<StringId>,
+    pub sh_type: u32,
+    pub sh_flags: u64,
+    pub sh_addr: u64,
+    pub sh_offset: u64,
+    pub sh_size: u64,
+    pub sh_link: u32,
+    pub sh_info: u32,
+    pub sh_addralign: u64,
+    pub sh_entsize: u64,
+}
+
+/// Native endian version of [`elf::Sym64`].
+#[allow(missing_docs)]
+#[derive(Debug, Clone)]
+pub struct Sym {
+    pub name: Option<StringId>,
+    pub section: Option<SectionIndex>,
+    pub st_info: u8,
+    pub st_other: u8,
+    pub st_shndx: u16,
+    pub st_value: u64,
+    pub st_size: u64,
+}
+
+/// Unified native endian version of [`elf::Rel64`] and [`elf::Rela64`].
+#[allow(missing_docs)]
+#[derive(Debug, Clone)]
+pub struct Rel {
+    pub r_offset: u64,
+    pub r_sym: u32,
+    pub r_type: u32,
+    pub r_addend: i64,
+}
+
+/// Information required for writing [`elf::Verdef`].
+#[allow(missing_docs)]
+#[derive(Debug, Clone)]
+pub struct Verdef {
+    pub version: u16,
+    pub flags: u16,
+    pub index: u16,
+    pub aux_count: u16,
+    /// The name for the first [`elf::Verdaux`] entry.
+    pub name: StringId,
+}
+
+/// Information required for writing [`elf::Verneed`].
+#[allow(missing_docs)]
+#[derive(Debug, Clone)]
+pub struct Verneed {
+    pub version: u16,
+    pub aux_count: u16,
+    pub file: StringId,
+}
+
+/// Information required for writing [`elf::Vernaux`].
+#[allow(missing_docs)]
+#[derive(Debug, Clone)]
+pub struct Vernaux {
+    pub flags: u16,
+    pub index: u16,
+    pub name: StringId,
+}
diff --git a/third_party/rust/object/src/write/macho.rs b/third_party/rust/object/src/write/macho.rs
new file mode 100644
index 0000000000..41b2836541
--- /dev/null
+++ b/third_party/rust/object/src/write/macho.rs
@@ -0,0 +1,888 @@
+use core::mem;
+
+use crate::endian::*;
+use crate::macho;
+use crate::write::string::*;
+use crate::write::util::*;
+use crate::write::*;
+use crate::AddressSize;
+
+#[derive(Default, Clone, Copy)]
+struct SectionOffsets {
+    index: usize,
+    offset: usize,
+    address: u64,
+    reloc_offset: usize,
+}
+
+#[derive(Default, Clone, Copy)]
+struct SymbolOffsets {
+    emit: bool,
+    index: usize,
+    str_id: Option<StringId>,
+}
+
+impl<'a> Object<'a> {
+    pub(crate) fn macho_set_subsections_via_symbols(&mut self) {
+        let flags = match self.flags {
+            FileFlags::MachO { flags } => flags,
+            _ => 0,
+        };
+        self.flags = FileFlags::MachO {
+            flags: flags | macho::MH_SUBSECTIONS_VIA_SYMBOLS,
+        };
+    }
+
+    pub(crate) fn macho_segment_name(&self, segment: StandardSegment) -> &'static [u8] {
+        match segment {
+            StandardSegment::Text => &b"__TEXT"[..],
+            StandardSegment::Data => &b"__DATA"[..],
+            StandardSegment::Debug => &b"__DWARF"[..],
+        }
+    }
+
+    pub(crate) fn macho_section_info(
+        &self,
+        section: StandardSection,
+    ) -> (&'static [u8], &'static [u8], SectionKind) {
+        match section {
+            StandardSection::Text => (&b"__TEXT"[..], &b"__text"[..], SectionKind::Text),
+            StandardSection::Data => (&b"__DATA"[..], &b"__data"[..], SectionKind::Data),
+            StandardSection::ReadOnlyData => {
+                (&b"__TEXT"[..], &b"__const"[..], SectionKind::ReadOnlyData)
+            }
+            StandardSection::ReadOnlyDataWithRel => (
+                &b"__DATA"[..],
+                &b"__const"[..],
+                SectionKind::ReadOnlyDataWithRel,
+            ),
+            StandardSection::ReadOnlyString => (
+                &b"__TEXT"[..],
+                &b"__cstring"[..],
+                SectionKind::ReadOnlyString,
+            ),
+            StandardSection::UninitializedData => (
+                &b"__DATA"[..],
+                &b"__bss"[..],
+                SectionKind::UninitializedData,
+            ),
+            StandardSection::Tls => (&b"__DATA"[..], &b"__thread_data"[..], SectionKind::Tls),
+            StandardSection::UninitializedTls => (
+                &b"__DATA"[..],
+                &b"__thread_bss"[..],
+                SectionKind::UninitializedTls,
+            ),
+            StandardSection::TlsVariables => (
+                &b"__DATA"[..],
+                &b"__thread_vars"[..],
+                SectionKind::TlsVariables,
+            ),
+            StandardSection::Common => (&b"__DATA"[..], &b"__common"[..], SectionKind::Common),
+        }
+    }
+
+    fn macho_tlv_bootstrap(&mut self) -> SymbolId {
+        match self.tlv_bootstrap {
+            Some(id) => id,
+            None => {
+                let id = self.add_symbol(Symbol {
+                    name: b"_tlv_bootstrap".to_vec(),
+                    value: 0,
+                    size: 0,
+                    kind: SymbolKind::Text,
+                    scope: SymbolScope::Dynamic,
+                    weak: false,
+                    section: SymbolSection::Undefined,
+                    flags: SymbolFlags::None,
+                });
+                self.tlv_bootstrap = Some(id);
+                id
+            }
+        }
+    }
+
+    /// Create the `__thread_vars` entry for a TLS variable.
+    ///
+    /// The symbol given by `symbol_id` will be updated to point to this entry.
+    ///
+    /// A new `SymbolId` will be returned. The caller must update this symbol
+    /// to point to the initializer.
+    ///
+    /// If `symbol_id` is not for a TLS variable, then it is returned unchanged.
+    pub(crate) fn macho_add_thread_var(&mut self, symbol_id: SymbolId) -> SymbolId {
+        let symbol = self.symbol_mut(symbol_id);
+        if symbol.kind != SymbolKind::Tls {
+            return symbol_id;
+        }
+
+        // Create the initializer symbol.
+        let mut name = symbol.name.clone();
+        name.extend_from_slice(b"$tlv$init");
+        let init_symbol_id = self.add_raw_symbol(Symbol {
+            name,
+            value: 0,
+            size: 0,
+            kind: SymbolKind::Tls,
+            scope: SymbolScope::Compilation,
+            weak: false,
+            section: SymbolSection::Undefined,
+            flags: SymbolFlags::None,
+        });
+
+        // Add the tlv entry.
+        // Three pointers in size:
+        //   - __tlv_bootstrap - used to make sure support exists
+        //   - spare pointer - used when mapped by the runtime
+        //   - pointer to symbol initializer
+        let section = self.section_id(StandardSection::TlsVariables);
+        let address_size = self.architecture.address_size().unwrap().bytes();
+        let size = u64::from(address_size) * 3;
+        let data = vec![0; size as usize];
+        let offset = self.append_section_data(section, &data, u64::from(address_size));
+
+        let tlv_bootstrap = self.macho_tlv_bootstrap();
+        self.add_relocation(
+            section,
+            Relocation {
+                offset,
+                size: address_size * 8,
+                kind: RelocationKind::Absolute,
+                encoding: RelocationEncoding::Generic,
+                symbol: tlv_bootstrap,
+                addend: 0,
+            },
+        )
+        .unwrap();
+        self.add_relocation(
+            section,
+            Relocation {
+                offset: offset + u64::from(address_size) * 2,
+                size: address_size * 8,
+                kind: RelocationKind::Absolute,
+                encoding: RelocationEncoding::Generic,
+                symbol: init_symbol_id,
+                addend: 0,
+            },
+        )
+        .unwrap();
+
+        // Update the symbol to point to the tlv.
+        let symbol = self.symbol_mut(symbol_id);
+        symbol.value = offset;
+        symbol.size = size;
+        symbol.section = SymbolSection::Section(section);
+
+        init_symbol_id
+    }
+
+    pub(crate) fn macho_fixup_relocation(&mut self, mut relocation: &mut Relocation) -> i64 {
+        let constant = match relocation.kind {
+            // AArch64Call relocations have special handling for the addend, so don't adjust it
+            RelocationKind::Relative if relocation.encoding == RelocationEncoding::AArch64Call => 0,
+            RelocationKind::Relative
+            | RelocationKind::GotRelative
+            | RelocationKind::PltRelative => relocation.addend + 4,
+            _ => relocation.addend,
+        };
+        // Aarch64 relocs of these sizes act as if they are double-word length
+        if self.architecture == Architecture::Aarch64 && matches!(relocation.size, 12 | 21 | 26) {
+            relocation.size = 32;
+        }
+        relocation.addend -= constant;
+        constant
+    }
+
+    pub(crate) fn macho_write(&self, buffer: &mut dyn WritableBuffer) -> Result<()> {
+        let address_size = self.architecture.address_size().unwrap();
+        let endian = self.endian;
+        let macho32 = MachO32 { endian };
+        let macho64 = MachO64 { endian };
+        let macho: &dyn MachO = match address_size {
+            AddressSize::U8 | AddressSize::U16 | AddressSize::U32 => &macho32,
+            AddressSize::U64 => &macho64,
+        };
+        let pointer_align = address_size.bytes() as usize;
+
+        // Calculate offsets of everything, and build strtab.
+        let mut offset = 0;
+
+        // Calculate size of Mach-O header.
+        offset += macho.mach_header_size();
+
+        // Calculate size of commands.
+        let mut ncmds = 0;
+        let command_offset = offset;
+
+        // Calculate size of segment command and section headers.
+        let segment_command_offset = offset;
+        let segment_command_len =
+            macho.segment_command_size() + self.sections.len() * macho.section_header_size();
+        offset += segment_command_len;
+        ncmds += 1;
+
+        // Calculate size of symtab command.
+        let symtab_command_offset = offset;
+        let symtab_command_len = mem::size_of::<macho::SymtabCommand<Endianness>>();
+        offset += symtab_command_len;
+        ncmds += 1;
+
+        let sizeofcmds = offset - command_offset;
+
+        // Calculate size of section data.
+        let mut segment_file_offset = None;
+        let mut section_offsets = vec![SectionOffsets::default(); self.sections.len()];
+        let mut address = 0;
+        for (index, section) in self.sections.iter().enumerate() {
+            section_offsets[index].index = 1 + index;
+            if !section.is_bss() {
+                let len = section.data.len();
+                if len != 0 {
+                    offset = align(offset, section.align as usize);
+                    section_offsets[index].offset = offset;
+                    if segment_file_offset.is_none() {
+                        segment_file_offset = Some(offset);
+                    }
+                    offset += len;
+                } else {
+                    section_offsets[index].offset = offset;
+                }
+                address = align_u64(address, section.align);
+                section_offsets[index].address = address;
+                address += section.size;
+            }
+        }
+        for (index, section) in self.sections.iter().enumerate() {
+            if section.kind.is_bss() {
+                assert!(section.data.is_empty());
+                address = align_u64(address, section.align);
+                section_offsets[index].address = address;
+                address += section.size;
+            }
+        }
+        let segment_file_offset = segment_file_offset.unwrap_or(offset);
+        let segment_file_size = offset - segment_file_offset;
+        debug_assert!(segment_file_size as u64 <= address);
+
+        // Count symbols and add symbol strings to strtab.
+        let mut strtab = StringTable::default();
+        let mut symbol_offsets = vec![SymbolOffsets::default(); self.symbols.len()];
+        let mut nsyms = 0;
+        for (index, symbol) in self.symbols.iter().enumerate() {
+            // The unified API allows creating symbols that we don't emit, so filter
+            // them out here.
+            //
+            // Since we don't actually emit the symbol kind, we validate it here too.
+            match symbol.kind {
+                SymbolKind::Text | SymbolKind::Data | SymbolKind::Tls => {}
+                SymbolKind::File | SymbolKind::Section => continue,
+                SymbolKind::Unknown => {
+                    if symbol.section != SymbolSection::Undefined {
+                        return Err(Error(format!(
+                            "defined symbol `{}` with unknown kind",
+                            symbol.name().unwrap_or(""),
+                        )));
+                    }
+                }
+                SymbolKind::Null | SymbolKind::Label => {
+                    return Err(Error(format!(
+                        "unimplemented symbol `{}` kind {:?}",
+                        symbol.name().unwrap_or(""),
+                        symbol.kind
+                    )));
+                }
+            }
+            symbol_offsets[index].emit = true;
+            symbol_offsets[index].index = nsyms;
+            nsyms += 1;
+            if !symbol.name.is_empty() {
+                symbol_offsets[index].str_id = Some(strtab.add(&symbol.name));
+            }
+        }
+
+        // Calculate size of symtab.
+        offset = align(offset, pointer_align);
+        let symtab_offset = offset;
+        let symtab_len = nsyms * macho.nlist_size();
+        offset += symtab_len;
+
+        // Calculate size of strtab.
+        let strtab_offset = offset;
+        // Start with null name.
+        let mut strtab_data = vec![0];
+        strtab.write(1, &mut strtab_data);
+        offset += strtab_data.len();
+
+        // Calculate size of relocations.
+        for (index, section) in self.sections.iter().enumerate() {
+            let count = section.relocations.len();
+            if count != 0 {
+                offset = align(offset, 4);
+                section_offsets[index].reloc_offset = offset;
+                let len = count * mem::size_of::<macho::Relocation<Endianness>>();
+                offset += len;
+            }
+        }
+
+        // Start writing.
+        buffer
+            .reserve(offset)
+            .map_err(|_| Error(String::from("Cannot allocate buffer")))?;
+
+        // Write file header.
+        let (cputype, cpusubtype) = match self.architecture {
+            Architecture::Arm => (macho::CPU_TYPE_ARM, macho::CPU_SUBTYPE_ARM_ALL),
+            Architecture::Aarch64 => (macho::CPU_TYPE_ARM64, macho::CPU_SUBTYPE_ARM64_ALL),
+            Architecture::I386 => (macho::CPU_TYPE_X86, macho::CPU_SUBTYPE_I386_ALL),
+            Architecture::X86_64 => (macho::CPU_TYPE_X86_64, macho::CPU_SUBTYPE_X86_64_ALL),
+            Architecture::PowerPc => (macho::CPU_TYPE_POWERPC, macho::CPU_SUBTYPE_POWERPC_ALL),
+            Architecture::PowerPc64 => (macho::CPU_TYPE_POWERPC64, macho::CPU_SUBTYPE_POWERPC_ALL),
+            _ => {
+                return Err(Error(format!(
+                    "unimplemented architecture {:?}",
+                    self.architecture
+                )));
+            }
+        };
+
+        let flags = match self.flags {
+            FileFlags::MachO { flags } => flags,
+            _ => 0,
+        };
+        macho.write_mach_header(
+            buffer,
+            MachHeader {
+                cputype,
+                cpusubtype,
+                filetype: macho::MH_OBJECT,
+                ncmds,
+                sizeofcmds: sizeofcmds as u32,
+                flags,
+            },
+        );
+
+        // Write segment command.
+        debug_assert_eq!(segment_command_offset, buffer.len());
+        macho.write_segment_command(
+            buffer,
+            SegmentCommand {
+                cmdsize: segment_command_len as u32,
+                segname: [0; 16],
+                vmaddr: 0,
+                vmsize: address,
+                fileoff: segment_file_offset as u64,
+                filesize: segment_file_size as u64,
+                maxprot: macho::VM_PROT_READ | macho::VM_PROT_WRITE | macho::VM_PROT_EXECUTE,
+                initprot: macho::VM_PROT_READ | macho::VM_PROT_WRITE | macho::VM_PROT_EXECUTE,
+                nsects: self.sections.len() as u32,
+                flags: 0,
+            },
+        );
+
+        // Write section headers.
+        for (index, section) in self.sections.iter().enumerate() {
+            let mut sectname = [0; 16];
+            sectname
+                .get_mut(..section.name.len())
+                .ok_or_else(|| {
+                    Error(format!(
+                        "section name `{}` is too long",
+                        section.name().unwrap_or(""),
+                    ))
+                })?
+                .copy_from_slice(&section.name);
+            let mut segname = [0; 16];
+            segname
+                .get_mut(..section.segment.len())
+                .ok_or_else(|| {
+                    Error(format!(
+                        "segment name `{}` is too long",
+                        section.segment().unwrap_or(""),
+                    ))
+                })?
+                .copy_from_slice(&section.segment);
+            let flags = if let SectionFlags::MachO { flags } = section.flags {
+                flags
+            } else {
+                match section.kind {
+                    SectionKind::Text => {
+                        macho::S_ATTR_PURE_INSTRUCTIONS | macho::S_ATTR_SOME_INSTRUCTIONS
+                    }
+                    SectionKind::Data => 0,
+                    SectionKind::ReadOnlyData | SectionKind::ReadOnlyDataWithRel => 0,
+                    SectionKind::ReadOnlyString => macho::S_CSTRING_LITERALS,
+                    SectionKind::UninitializedData | SectionKind::Common => macho::S_ZEROFILL,
+                    SectionKind::Tls => macho::S_THREAD_LOCAL_REGULAR,
+                    SectionKind::UninitializedTls => macho::S_THREAD_LOCAL_ZEROFILL,
+                    SectionKind::TlsVariables => macho::S_THREAD_LOCAL_VARIABLES,
+                    SectionKind::Debug => macho::S_ATTR_DEBUG,
+                    SectionKind::OtherString => macho::S_CSTRING_LITERALS,
+                    SectionKind::Other | SectionKind::Linker | SectionKind::Metadata => 0,
+                    SectionKind::Note | SectionKind::Unknown | SectionKind::Elf(_) => {
+                        return Err(Error(format!(
+                            "unimplemented section `{}` kind {:?}",
+                            section.name().unwrap_or(""),
+                            section.kind
+                        )));
+                    }
+                }
+            };
+            macho.write_section(
+                buffer,
+                SectionHeader {
+                    sectname,
+                    segname,
+                    addr: section_offsets[index].address,
+                    size: section.size,
+                    offset: section_offsets[index].offset as u32,
+                    align: section.align.trailing_zeros(),
+                    reloff: section_offsets[index].reloc_offset as u32,
+                    nreloc: section.relocations.len() as u32,
+                    flags,
+                },
+            );
+        }
+
+        // Write symtab command.
+        debug_assert_eq!(symtab_command_offset, buffer.len());
+        let symtab_command = macho::SymtabCommand {
+            cmd: U32::new(endian, macho::LC_SYMTAB),
+            cmdsize: U32::new(endian, symtab_command_len as u32),
+            symoff: U32::new(endian, symtab_offset as u32),
+            nsyms: U32::new(endian, nsyms as u32),
+            stroff: U32::new(endian, strtab_offset as u32),
+            strsize: U32::new(endian, strtab_data.len() as u32),
+        };
+        buffer.write(&symtab_command);
+
+        // Write section data.
+        for (index, section) in self.sections.iter().enumerate() {
+            let len = section.data.len();
+            if len != 0 {
+                write_align(buffer, section.align as usize);
+                debug_assert_eq!(section_offsets[index].offset, buffer.len());
+                buffer.write_bytes(&section.data);
+            }
+        }
+        debug_assert_eq!(segment_file_offset + segment_file_size, buffer.len());
+
+        // Write symtab.
+        write_align(buffer, pointer_align);
+        debug_assert_eq!(symtab_offset, buffer.len());
+        for (index, symbol) in self.symbols.iter().enumerate() {
+            if !symbol_offsets[index].emit {
+                continue;
+            }
+            // TODO: N_STAB
+            let (mut n_type, n_sect) = match symbol.section {
+                SymbolSection::Undefined => (macho::N_UNDF | macho::N_EXT, 0),
+                SymbolSection::Absolute => (macho::N_ABS, 0),
+                SymbolSection::Section(id) => (macho::N_SECT, id.0 + 1),
+                SymbolSection::None | SymbolSection::Common => {
+                    return Err(Error(format!(
+                        "unimplemented symbol `{}` section {:?}",
+                        symbol.name().unwrap_or(""),
+                        symbol.section
+                    )));
+                }
+            };
+            match symbol.scope {
+                SymbolScope::Unknown | SymbolScope::Compilation => {}
+                SymbolScope::Linkage => {
+                    n_type |= macho::N_EXT | macho::N_PEXT;
+                }
+                SymbolScope::Dynamic => {
+                    n_type |= macho::N_EXT;
+                }
+            }
+
+            let n_desc = if let SymbolFlags::MachO { n_desc } = symbol.flags {
+                n_desc
+            } else {
+                let mut n_desc = 0;
+                if symbol.weak {
+                    if symbol.is_undefined() {
+                        n_desc |= macho::N_WEAK_REF;
+                    } else {
+                        n_desc |= macho::N_WEAK_DEF;
+                    }
+                }
+                n_desc
+            };
+
+            let n_value = match symbol.section.id() {
+                Some(section) => section_offsets[section.0].address + symbol.value,
+                None => symbol.value,
+            };
+
+            let n_strx = symbol_offsets[index]
+                .str_id
+                .map(|id| strtab.get_offset(id))
+                .unwrap_or(0);
+
+            macho.write_nlist(
+                buffer,
+                Nlist {
+                    n_strx: n_strx as u32,
+                    n_type,
+                    n_sect: n_sect as u8,
+                    n_desc,
+                    n_value,
+                },
+            );
+        }
+
+        // Write strtab.
+        debug_assert_eq!(strtab_offset, buffer.len());
+        buffer.write_bytes(&strtab_data);
+
+        // Write relocations.
+        for (index, section) in self.sections.iter().enumerate() {
+            if !section.relocations.is_empty() {
+                write_align(buffer, 4);
+                debug_assert_eq!(section_offsets[index].reloc_offset, buffer.len());
+                for reloc in &section.relocations {
+                    let r_extern;
+                    let mut r_symbolnum;
+                    let symbol = &self.symbols[reloc.symbol.0];
+                    if symbol.kind == SymbolKind::Section {
+                        r_symbolnum = section_offsets[symbol.section.id().unwrap().0].index as u32;
+                        r_extern = false;
+                    } else {
+                        r_symbolnum = symbol_offsets[reloc.symbol.0].index as u32;
+                        r_extern = true;
+                    }
+                    let r_length = match reloc.size {
+                        8 => 0,
+                        16 => 1,
+                        32 => 2,
+                        64 => 3,
+                        _ => return Err(Error(format!("unimplemented reloc size {:?}", reloc))),
+                    };
+                    let (r_pcrel, r_type) = match self.architecture {
+                        Architecture::I386 => match reloc.kind {
+                            RelocationKind::Absolute => (false, macho::GENERIC_RELOC_VANILLA),
+                            _ => {
+                                return Err(Error(format!("unimplemented relocation {:?}", reloc)));
+                            }
+                        },
+                        Architecture::X86_64 => match (reloc.kind, reloc.encoding, reloc.addend) {
+                            (RelocationKind::Absolute, RelocationEncoding::Generic, 0) => {
+                                (false, macho::X86_64_RELOC_UNSIGNED)
+                            }
+                            (RelocationKind::Relative, RelocationEncoding::Generic, -4) => {
+                                (true, macho::X86_64_RELOC_SIGNED)
+                            }
+                            (RelocationKind::Relative, RelocationEncoding::X86RipRelative, -4) => {
+                                (true, macho::X86_64_RELOC_SIGNED)
+                            }
+                            (RelocationKind::Relative, RelocationEncoding::X86Branch, -4) => {
+                                (true, macho::X86_64_RELOC_BRANCH)
+                            }
+                            (RelocationKind::PltRelative, RelocationEncoding::X86Branch, -4) => {
+                                (true, macho::X86_64_RELOC_BRANCH)
+                            }
+                            (RelocationKind::GotRelative, RelocationEncoding::Generic, -4) => {
+                                (true, macho::X86_64_RELOC_GOT)
+                            }
+                            (
+                                RelocationKind::GotRelative,
+                                RelocationEncoding::X86RipRelativeMovq,
+                                -4,
+                            ) => (true, macho::X86_64_RELOC_GOT_LOAD),
+                            (RelocationKind::MachO { value, relative }, _, _) => (relative, value),
+                            _ => {
+                                return Err(Error(format!("unimplemented relocation {:?}", reloc)));
+                            }
+                        },
+                        Architecture::Aarch64 => match (reloc.kind, reloc.encoding, reloc.addend) {
+                            (RelocationKind::Absolute, RelocationEncoding::Generic, 0) => {
+                                (false, macho::ARM64_RELOC_UNSIGNED)
+                            }
+                            (RelocationKind::Relative, RelocationEncoding::AArch64Call, 0) => {
+                                (true, macho::ARM64_RELOC_BRANCH26)
+                            }
+                            // Non-zero addend, so we have to encode the addend separately
+                            (RelocationKind::Relative, RelocationEncoding::AArch64Call, value) => {
+                                // first emit the BR26 relocation
+                                let reloc_info = macho::RelocationInfo {
+                                    r_address: reloc.offset as u32,
+                                    r_symbolnum,
+                                    r_pcrel: true,
+                                    r_length,
+                                    r_extern: true,
+                                    r_type: macho::ARM64_RELOC_BRANCH26,
+                                };
+                                buffer.write(&reloc_info.relocation(endian));
+
+                                // set up a separate relocation for the addend
+                                r_symbolnum = value as u32;
+                                (false, macho::ARM64_RELOC_ADDEND)
+                            }
+                            (
+                                RelocationKind::MachO { value, relative },
+                                RelocationEncoding::Generic,
+                                0,
+                            ) => (relative, value),
+                            _ => {
+                                return Err(Error(format!("unimplemented relocation {:?}", reloc)));
+                            }
+                        },
+                        _ => {
+                            if let RelocationKind::MachO { value, relative } = reloc.kind {
+                                (relative, value)
+                            } else {
+                                return Err(Error(format!("unimplemented relocation {:?}", reloc)));
+                            }
+                        }
+                    };
+                    let reloc_info = macho::RelocationInfo {
+                        r_address: reloc.offset as u32,
+                        r_symbolnum,
+                        r_pcrel,
+                        r_length,
+                        r_extern,
+                        r_type,
+                    };
+                    buffer.write(&reloc_info.relocation(endian));
+                }
+            }
+        }
+
+        debug_assert_eq!(offset, buffer.len());
+
+        Ok(())
+    }
+}
+
+struct MachHeader {
+    cputype: u32,
+    cpusubtype: u32,
+    filetype: u32,
+    ncmds: u32,
+    sizeofcmds: u32,
+    flags: u32,
+}
+
+struct SegmentCommand {
+    cmdsize: u32,
+    segname: [u8; 16],
+    vmaddr: u64,
+    vmsize: u64,
+    fileoff: u64,
+    filesize: u64,
+    maxprot: u32,
+    initprot: u32,
+    nsects: u32,
+    flags: u32,
+}
+
+pub struct SectionHeader {
+    sectname: [u8; 16],
+    segname: [u8; 16],
+    addr: u64,
+    size: u64,
+    offset: u32,
+    align: u32,
+    reloff: u32,
+    nreloc: u32,
+    flags: u32,
+}
+
+struct Nlist {
+    n_strx: u32,
+    n_type: u8,
+    n_sect: u8,
+    n_desc: u16,
+    n_value: u64,
+}
+
+trait MachO {
+    fn mach_header_size(&self) -> usize;
+    fn segment_command_size(&self) -> usize;
+    fn section_header_size(&self) -> usize;
+    fn nlist_size(&self) -> usize;
+    fn write_mach_header(&self, buffer: &mut dyn WritableBuffer, section: MachHeader);
+    fn write_segment_command(&self, buffer: &mut dyn WritableBuffer, segment: SegmentCommand);
+    fn write_section(&self, buffer: &mut dyn WritableBuffer, section: SectionHeader);
+    fn write_nlist(&self, buffer: &mut dyn WritableBuffer, nlist: Nlist);
+}
+
+struct MachO32<E> {
+    endian: E,
+}
+
+impl<E: Endian> MachO for MachO32<E> {
+    fn mach_header_size(&self) -> usize {
+        mem::size_of::<macho::MachHeader32<E>>()
+    }
+
+    fn segment_command_size(&self) -> usize {
+        mem::size_of::<macho::SegmentCommand32<E>>()
+    }
+
+    fn section_header_size(&self) -> usize {
+        mem::size_of::<macho::Section32<E>>()
+    }
+
+    fn nlist_size(&self) -> usize {
+        mem::size_of::<macho::Nlist32<E>>()
+    }
+
+    fn write_mach_header(&self, buffer: &mut dyn WritableBuffer, header: MachHeader) {
+        let endian = self.endian;
+        let magic = if endian.is_big_endian() {
+            macho::MH_MAGIC
+        } else {
+            macho::MH_CIGAM
+        };
+        let header = macho::MachHeader32 {
+            magic: U32::new(BigEndian, magic),
+            cputype: U32::new(endian, header.cputype),
+            cpusubtype: U32::new(endian, header.cpusubtype),
+            filetype: U32::new(endian, header.filetype),
+            ncmds: U32::new(endian, header.ncmds),
+            sizeofcmds: U32::new(endian, header.sizeofcmds),
+            flags: U32::new(endian, header.flags),
+        };
+        buffer.write(&header);
+    }
+
+    fn write_segment_command(&self, buffer: &mut dyn WritableBuffer, segment: SegmentCommand) {
+        let endian = self.endian;
+        let segment = macho::SegmentCommand32 {
+            cmd: U32::new(endian, macho::LC_SEGMENT),
+            cmdsize: U32::new(endian, segment.cmdsize),
+            segname: segment.segname,
+            vmaddr: U32::new(endian, segment.vmaddr as u32),
+            vmsize: U32::new(endian, segment.vmsize as u32),
+            fileoff: U32::new(endian, segment.fileoff as u32),
+            filesize: U32::new(endian, segment.filesize as u32),
+            maxprot: U32::new(endian, segment.maxprot),
+            initprot: U32::new(endian, segment.initprot),
+            nsects: U32::new(endian, segment.nsects),
+            flags: U32::new(endian, segment.flags),
+        };
+        buffer.write(&segment);
+    }
+
+    fn write_section(&self, buffer: &mut dyn WritableBuffer, section: SectionHeader) {
+        let endian = self.endian;
+        let section = macho::Section32 {
+            sectname: section.sectname,
+            segname: section.segname,
+            addr: U32::new(endian, section.addr as u32),
+            size: U32::new(endian, section.size as u32),
+            offset: U32::new(endian, section.offset),
+            align: U32::new(endian, section.align),
+            reloff: U32::new(endian, section.reloff),
+            nreloc: U32::new(endian, section.nreloc),
+            flags: U32::new(endian, section.flags),
+            reserved1: U32::default(),
+            reserved2: U32::default(),
+        };
+        buffer.write(&section);
+    }
+
+    fn write_nlist(&self, buffer: &mut dyn WritableBuffer, nlist: Nlist) {
+        let endian = self.endian;
+        let nlist = macho::Nlist32 {
+            n_strx: U32::new(endian, nlist.n_strx),
+            n_type: nlist.n_type,
+            n_sect: nlist.n_sect,
+            n_desc: U16::new(endian, nlist.n_desc),
+            n_value: U32::new(endian, nlist.n_value as u32),
+        };
+        buffer.write(&nlist);
+    }
+}
+
+struct MachO64<E> {
+    endian: E,
+}
+
+impl<E: Endian> MachO for MachO64<E> {
+    fn mach_header_size(&self) -> usize {
+        mem::size_of::<macho::MachHeader64<E>>()
+    }
+
+    fn segment_command_size(&self) -> usize {
+        mem::size_of::<macho::SegmentCommand64<E>>()
+    }
+
+    fn section_header_size(&self) -> usize {
+        mem::size_of::<macho::Section64<E>>()
+    }
+
+    fn nlist_size(&self) -> usize {
+        mem::size_of::<macho::Nlist64<E>>()
+    }
+
+    fn write_mach_header(&self, buffer: &mut dyn WritableBuffer, header: MachHeader) {
+        let endian = self.endian;
+        let magic = if endian.is_big_endian() {
+            macho::MH_MAGIC_64
+        } else {
+            macho::MH_CIGAM_64
+        };
+        let header = macho::MachHeader64 {
+            magic: U32::new(BigEndian, magic),
+            cputype: U32::new(endian, header.cputype),
+            cpusubtype: U32::new(endian, header.cpusubtype),
+            filetype: U32::new(endian, header.filetype),
+            ncmds: U32::new(endian, header.ncmds),
+            sizeofcmds: U32::new(endian, header.sizeofcmds),
+            flags: U32::new(endian, header.flags),
+            reserved: U32::default(),
+        };
+        buffer.write(&header);
+    }
+
+    fn write_segment_command(&self, buffer: &mut dyn WritableBuffer, segment: SegmentCommand) {
+        let endian = self.endian;
+        let segment = macho::SegmentCommand64 {
+            cmd: U32::new(endian, macho::LC_SEGMENT_64),
+            cmdsize: U32::new(endian, segment.cmdsize),
+            segname: segment.segname,
+            vmaddr: U64::new(endian, segment.vmaddr),
+            vmsize: U64::new(endian, segment.vmsize),
+            fileoff: U64::new(endian, segment.fileoff),
+            filesize: U64::new(endian, segment.filesize),
+            maxprot: U32::new(endian, segment.maxprot),
+            initprot: U32::new(endian, segment.initprot),
+            nsects: U32::new(endian, segment.nsects),
+            flags: U32::new(endian, segment.flags),
+        };
+        buffer.write(&segment);
+    }
+
+    fn write_section(&self, buffer: &mut dyn WritableBuffer, section: SectionHeader) {
+        let endian = self.endian;
+        let section = macho::Section64 {
+            sectname: section.sectname,
+            segname: section.segname,
+            addr: U64::new(endian, section.addr),
+            size: U64::new(endian, section.size),
+            offset: U32::new(endian, section.offset),
+            align: U32::new(endian, section.align),
+            reloff: U32::new(endian, section.reloff),
+            nreloc: U32::new(endian, section.nreloc),
+            flags: U32::new(endian, section.flags),
+            reserved1: U32::default(),
+            reserved2: U32::default(),
+            reserved3: U32::default(),
+        };
+        buffer.write(&section);
+    }
+
+    fn write_nlist(&self, buffer: &mut dyn WritableBuffer, nlist: Nlist) {
+        let endian = self.endian;
+        let nlist = macho::Nlist64 {
+            n_strx: U32::new(endian, nlist.n_strx),
+            n_type: nlist.n_type,
+            n_sect: nlist.n_sect,
+            n_desc: U16::new(endian, nlist.n_desc),
+            n_value: U64Bytes::new(endian, nlist.n_value),
+        };
+        buffer.write(&nlist);
+    }
+}
diff --git a/third_party/rust/object/src/write/mod.rs b/third_party/rust/object/src/write/mod.rs
new file mode 100644
index 0000000000..c50640ae70
--- /dev/null
+++ b/third_party/rust/object/src/write/mod.rs
@@ -0,0 +1,917 @@
+//! Interface for writing object files.
+
+use alloc::borrow::Cow;
+use alloc::string::String;
+use alloc::vec::Vec;
+use core::{fmt, result, str};
+#[cfg(not(feature = "std"))]
+use hashbrown::HashMap;
+#[cfg(feature = "std")]
+use std::{boxed::Box, collections::HashMap, error, io};
+
+use crate::endian::{Endianness, U32, U64};
+use crate::{
+    Architecture, BinaryFormat, ComdatKind, FileFlags, RelocationEncoding, RelocationKind,
+    SectionFlags, SectionKind, SymbolFlags, SymbolKind, SymbolScope,
+};
+
+#[cfg(feature = "coff")]
+mod coff;
+#[cfg(feature = "coff")]
+pub use coff::CoffExportStyle;
+
+#[cfg(feature = "elf")]
+pub mod elf;
+
+#[cfg(feature = "macho")]
+mod macho;
+
+#[cfg(feature = "pe")]
+pub mod pe;
+
+mod string;
+pub use string::StringId;
+
+mod util;
+pub use util::*;
+
+/// The error type used within the write module.
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct Error(String);
+
+impl fmt::Display for Error {
+    #[inline]
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        f.write_str(&self.0)
+    }
+}
+
+#[cfg(feature = "std")]
+impl error::Error for Error {}
+
+/// The result type used within the write module.
+pub type Result<T> = result::Result<T, Error>;
+
+/// A writable object file.
+#[derive(Debug)]
+pub struct Object<'a> {
+    format: BinaryFormat,
+    architecture: Architecture,
+    endian: Endianness,
+    sections: Vec<Section<'a>>,
+    standard_sections: HashMap<StandardSection, SectionId>,
+    symbols: Vec<Symbol>,
+    symbol_map: HashMap<Vec<u8>, SymbolId>,
+    stub_symbols: HashMap<SymbolId, SymbolId>,
+    comdats: Vec<Comdat>,
+    /// File flags that are specific to each file format.
+    pub flags: FileFlags,
+    /// The symbol name mangling scheme.
+    pub mangling: Mangling,
+    /// Mach-O "_tlv_bootstrap" symbol.
+    tlv_bootstrap: Option<SymbolId>,
+}
+
+impl<'a> Object<'a> {
+    /// Create an empty object file.
+    pub fn new(format: BinaryFormat, architecture: Architecture, endian: Endianness) -> Object<'a> {
+        Object {
+            format,
+            architecture,
+            endian,
+            sections: Vec::new(),
+            standard_sections: HashMap::new(),
+            symbols: Vec::new(),
+            symbol_map: HashMap::new(),
+            stub_symbols: HashMap::new(),
+            comdats: Vec::new(),
+            flags: FileFlags::None,
+            mangling: Mangling::default(format, architecture),
+            tlv_bootstrap: None,
+        }
+    }
+
+    /// Return the file format.
+    #[inline]
+    pub fn format(&self) -> BinaryFormat {
+        self.format
+    }
+
+    /// Return the architecture.
+    #[inline]
+    pub fn architecture(&self) -> Architecture {
+        self.architecture
+    }
+
+    /// Return the current mangling setting.
+    #[inline]
+    pub fn mangling(&self) -> Mangling {
+        self.mangling
+    }
+
+    /// Specify the mangling setting.
+    #[inline]
+    pub fn set_mangling(&mut self, mangling: Mangling) {
+        self.mangling = mangling;
+    }
+
+    /// Return the name for a standard segment.
+    ///
+    /// This will vary based on the file format.
+    #[allow(unused_variables)]
+    pub fn segment_name(&self, segment: StandardSegment) -> &'static [u8] {
+        match self.format {
+            #[cfg(feature = "coff")]
+            BinaryFormat::Coff => &[],
+            #[cfg(feature = "elf")]
+            BinaryFormat::Elf => &[],
+            #[cfg(feature = "macho")]
+            BinaryFormat::MachO => self.macho_segment_name(segment),
+            _ => unimplemented!(),
+        }
+    }
+
+    /// Get the section with the given `SectionId`.
+    #[inline]
+    pub fn section(&self, section: SectionId) -> &Section<'a> {
+        &self.sections[section.0]
+    }
+
+    /// Mutably get the section with the given `SectionId`.
+    #[inline]
+    pub fn section_mut(&mut self, section: SectionId) -> &mut Section<'a> {
+        &mut self.sections[section.0]
+    }
+
+    /// Set the data for an existing section.
+    ///
+    /// Must not be called for sections that already have data, or that contain uninitialized data.
+    pub fn set_section_data<T>(&mut self, section: SectionId, data: T, align: u64)
+    where
+        T: Into<Cow<'a, [u8]>>,
+    {
+        self.sections[section.0].set_data(data, align)
+    }
+
+    /// Append data to an existing section. Returns the section offset of the data.
+    pub fn append_section_data(&mut self, section: SectionId, data: &[u8], align: u64) -> u64 {
+        self.sections[section.0].append_data(data, align)
+    }
+
+    /// Append zero-initialized data to an existing section. Returns the section offset of the data.
+    pub fn append_section_bss(&mut self, section: SectionId, size: u64, align: u64) -> u64 {
+        self.sections[section.0].append_bss(size, align)
+    }
+
+    /// Return the `SectionId` of a standard section.
+    ///
+    /// If the section doesn't already exist then it is created.
+    pub fn section_id(&mut self, section: StandardSection) -> SectionId {
+        self.standard_sections
+            .get(&section)
+            .cloned()
+            .unwrap_or_else(|| {
+                let (segment, name, kind) = self.section_info(section);
+                self.add_section(segment.to_vec(), name.to_vec(), kind)
+            })
+    }
+
+    /// Add a new section and return its `SectionId`.
+    ///
+    /// This also creates a section symbol.
+    pub fn add_section(&mut self, segment: Vec<u8>, name: Vec<u8>, kind: SectionKind) -> SectionId {
+        let id = SectionId(self.sections.len());
+        self.sections.push(Section {
+            segment,
+            name,
+            kind,
+            size: 0,
+            align: 1,
+            data: Cow::Borrowed(&[]),
+            relocations: Vec::new(),
+            symbol: None,
+            flags: SectionFlags::None,
+        });
+
+        // Add to self.standard_sections if required. This may match multiple standard sections.
+        let section = &self.sections[id.0];
+        for standard_section in StandardSection::all() {
+            if !self.standard_sections.contains_key(standard_section) {
+                let (segment, name, kind) = self.section_info(*standard_section);
+                if segment == &*section.segment && name == &*section.name && kind == section.kind {
+                    self.standard_sections.insert(*standard_section, id);
+                }
+            }
+        }
+
+        id
+    }
+
+    fn section_info(
+        &self,
+        section: StandardSection,
+    ) -> (&'static [u8], &'static [u8], SectionKind) {
+        match self.format {
+            #[cfg(feature = "coff")]
+            BinaryFormat::Coff => self.coff_section_info(section),
+            #[cfg(feature = "elf")]
+            BinaryFormat::Elf => self.elf_section_info(section),
+            #[cfg(feature = "macho")]
+            BinaryFormat::MachO => self.macho_section_info(section),
+            _ => unimplemented!(),
+        }
+    }
+
+    /// Add a subsection. Returns the `SectionId` and section offset of the data.
+    pub fn add_subsection(
+        &mut self,
+        section: StandardSection,
+        name: &[u8],
+        data: &[u8],
+        align: u64,
+    ) -> (SectionId, u64) {
+        let section_id = if self.has_subsections_via_symbols() {
+            self.set_subsections_via_symbols();
+            self.section_id(section)
+        } else {
+            let (segment, name, kind) = self.subsection_info(section, name);
+            self.add_section(segment.to_vec(), name, kind)
+        };
+        let offset = self.append_section_data(section_id, data, align);
+        (section_id, offset)
+    }
+
+    fn has_subsections_via_symbols(&self) -> bool {
+        match self.format {
+            BinaryFormat::Coff | BinaryFormat::Elf => false,
+            BinaryFormat::MachO => true,
+            _ => unimplemented!(),
+        }
+    }
+
+    fn set_subsections_via_symbols(&mut self) {
+        match self.format {
+            #[cfg(feature = "macho")]
+            BinaryFormat::MachO => self.macho_set_subsections_via_symbols(),
+            _ => unimplemented!(),
+        }
+    }
+
+    fn subsection_info(
+        &self,
+        section: StandardSection,
+        value: &[u8],
+    ) -> (&'static [u8], Vec<u8>, SectionKind) {
+        let (segment, section, kind) = self.section_info(section);
+        let name = self.subsection_name(section, value);
+        (segment, name, kind)
+    }
+
+    #[allow(unused_variables)]
+    fn subsection_name(&self, section: &[u8], value: &[u8]) -> Vec<u8> {
+        debug_assert!(!self.has_subsections_via_symbols());
+        match self.format {
+            #[cfg(feature = "coff")]
+            BinaryFormat::Coff => self.coff_subsection_name(section, value),
+            #[cfg(feature = "elf")]
+            BinaryFormat::Elf => self.elf_subsection_name(section, value),
+            _ => unimplemented!(),
+        }
+    }
+
+    /// Get the COMDAT section group with the given `ComdatId`.
+    #[inline]
+    pub fn comdat(&self, comdat: ComdatId) -> &Comdat {
+        &self.comdats[comdat.0]
+    }
+
+    /// Mutably get the COMDAT section group with the given `ComdatId`.
+    #[inline]
+    pub fn comdat_mut(&mut self, comdat: ComdatId) -> &mut Comdat {
+        &mut self.comdats[comdat.0]
+    }
+
+    /// Add a new COMDAT section group and return its `ComdatId`.
+    pub fn add_comdat(&mut self, comdat: Comdat) -> ComdatId {
+        let comdat_id = ComdatId(self.comdats.len());
+        self.comdats.push(comdat);
+        comdat_id
+    }
+
+    /// Get the `SymbolId` of the symbol with the given name.
+    pub fn symbol_id(&self, name: &[u8]) -> Option<SymbolId> {
+        self.symbol_map.get(name).cloned()
+    }
+
+    /// Get the symbol with the given `SymbolId`.
+    #[inline]
+    pub fn symbol(&self, symbol: SymbolId) -> &Symbol {
+        &self.symbols[symbol.0]
+    }
+
+    /// Mutably get the symbol with the given `SymbolId`.
+    #[inline]
+    pub fn symbol_mut(&mut self, symbol: SymbolId) -> &mut Symbol {
+        &mut self.symbols[symbol.0]
+    }
+
+    /// Add a new symbol and return its `SymbolId`.
+    pub fn add_symbol(&mut self, mut symbol: Symbol) -> SymbolId {
+        // Defined symbols must have a scope.
+        debug_assert!(symbol.is_undefined() || symbol.scope != SymbolScope::Unknown);
+        if symbol.kind == SymbolKind::Section {
+            // There can only be one section symbol, but update its flags, since
+            // the automatically generated section symbol will have none.
+            let symbol_id = self.section_symbol(symbol.section.id().unwrap());
+            if symbol.flags != SymbolFlags::None {
+                self.symbol_mut(symbol_id).flags = symbol.flags;
+            }
+            return symbol_id;
+        }
+        if !symbol.name.is_empty()
+            && (symbol.kind == SymbolKind::Text
+                || symbol.kind == SymbolKind::Data
+                || symbol.kind == SymbolKind::Tls)
+        {
+            let unmangled_name = symbol.name.clone();
+            if let Some(prefix) = self.mangling.global_prefix() {
+                symbol.name.insert(0, prefix);
+            }
+            let symbol_id = self.add_raw_symbol(symbol);
+            self.symbol_map.insert(unmangled_name, symbol_id);
+            symbol_id
+        } else {
+            self.add_raw_symbol(symbol)
+        }
+    }
+
+    fn add_raw_symbol(&mut self, symbol: Symbol) -> SymbolId {
+        let symbol_id = SymbolId(self.symbols.len());
+        self.symbols.push(symbol);
+        symbol_id
+    }
+
+    /// Return true if the file format supports `StandardSection::UninitializedTls`.
+    #[inline]
+    pub fn has_uninitialized_tls(&self) -> bool {
+        self.format != BinaryFormat::Coff
+    }
+
+    /// Return true if the file format supports `StandardSection::Common`.
+    #[inline]
+    pub fn has_common(&self) -> bool {
+        self.format == BinaryFormat::MachO
+    }
+
+    /// Add a new common symbol and return its `SymbolId`.
+    ///
+    /// For Mach-O, this appends the symbol to the `__common` section.
+    pub fn add_common_symbol(&mut self, mut symbol: Symbol, size: u64, align: u64) -> SymbolId {
+        if self.has_common() {
+            let symbol_id = self.add_symbol(symbol);
+            let section = self.section_id(StandardSection::Common);
+            self.add_symbol_bss(symbol_id, section, size, align);
+            symbol_id
+        } else {
+            symbol.section = SymbolSection::Common;
+            symbol.size = size;
+            self.add_symbol(symbol)
+        }
+    }
+
+    /// Add a new file symbol and return its `SymbolId`.
+    pub fn add_file_symbol(&mut self, name: Vec<u8>) -> SymbolId {
+        self.add_raw_symbol(Symbol {
+            name,
+            value: 0,
+            size: 0,
+            kind: SymbolKind::File,
+            scope: SymbolScope::Compilation,
+            weak: false,
+            section: SymbolSection::None,
+            flags: SymbolFlags::None,
+        })
+    }
+
+    /// Get the symbol for a section.
+    pub fn section_symbol(&mut self, section_id: SectionId) -> SymbolId {
+        let section = &mut self.sections[section_id.0];
+        if let Some(symbol) = section.symbol {
+            return symbol;
+        }
+        let name = if self.format == BinaryFormat::Coff {
+            section.name.clone()
+        } else {
+            Vec::new()
+        };
+        let symbol_id = SymbolId(self.symbols.len());
+        self.symbols.push(Symbol {
+            name,
+            value: 0,
+            size: 0,
+            kind: SymbolKind::Section,
+            scope: SymbolScope::Compilation,
+            weak: false,
+            section: SymbolSection::Section(section_id),
+            flags: SymbolFlags::None,
+        });
+        section.symbol = Some(symbol_id);
+        symbol_id
+    }
+
+    /// Append data to an existing section, and update a symbol to refer to it.
+    ///
+    /// For Mach-O, this also creates a `__thread_vars` entry for TLS symbols, and the
+    /// symbol will indirectly point to the added data via the `__thread_vars` entry.
+    ///
+    /// Returns the section offset of the data.
+    pub fn add_symbol_data(
+        &mut self,
+        symbol_id: SymbolId,
+        section: SectionId,
+        data: &[u8],
+        align: u64,
+    ) -> u64 {
+        let offset = self.append_section_data(section, data, align);
+        self.set_symbol_data(symbol_id, section, offset, data.len() as u64);
+        offset
+    }
+
+    /// Append zero-initialized data to an existing section, and update a symbol to refer to it.
+    ///
+    /// For Mach-O, this also creates a `__thread_vars` entry for TLS symbols, and the
+    /// symbol will indirectly point to the added data via the `__thread_vars` entry.
+    ///
+    /// Returns the section offset of the data.
+    pub fn add_symbol_bss(
+        &mut self,
+        symbol_id: SymbolId,
+        section: SectionId,
+        size: u64,
+        align: u64,
+    ) -> u64 {
+        let offset = self.append_section_bss(section, size, align);
+        self.set_symbol_data(symbol_id, section, offset, size);
+        offset
+    }
+
+    /// Update a symbol to refer to the given data within a section.
+    ///
+    /// For Mach-O, this also creates a `__thread_vars` entry for TLS symbols, and the
+    /// symbol will indirectly point to the data via the `__thread_vars` entry.
+    #[allow(unused_mut)]
+    pub fn set_symbol_data(
+        &mut self,
+        mut symbol_id: SymbolId,
+        section: SectionId,
+        offset: u64,
+        size: u64,
+    ) {
+        // Defined symbols must have a scope.
+        debug_assert!(self.symbol(symbol_id).scope != SymbolScope::Unknown);
+        match self.format {
+            #[cfg(feature = "macho")]
+            BinaryFormat::MachO => symbol_id = self.macho_add_thread_var(symbol_id),
+            _ => {}
+        }
+        let symbol = self.symbol_mut(symbol_id);
+        symbol.value = offset;
+        symbol.size = size;
+        symbol.section = SymbolSection::Section(section);
+    }
+
+    /// Convert a symbol to a section symbol and offset.
+    ///
+    /// Returns `None` if the symbol does not have a section.
+    pub fn symbol_section_and_offset(&mut self, symbol_id: SymbolId) -> Option<(SymbolId, u64)> {
+        let symbol = self.symbol(symbol_id);
+        if symbol.kind == SymbolKind::Section {
+            return Some((symbol_id, 0));
+        }
+        let symbol_offset = symbol.value;
+        let section = symbol.section.id()?;
+        let section_symbol = self.section_symbol(section);
+        Some((section_symbol, symbol_offset))
+    }
+
+    /// Add a relocation to a section.
+    ///
+    /// Relocations must only be added after the referenced symbols have been added
+    /// and defined (if applicable).
+    pub fn add_relocation(&mut self, section: SectionId, mut relocation: Relocation) -> Result<()> {
+        let addend = match self.format {
+            #[cfg(feature = "coff")]
+            BinaryFormat::Coff => self.coff_fixup_relocation(&mut relocation),
+            #[cfg(feature = "elf")]
+            BinaryFormat::Elf => self.elf_fixup_relocation(&mut relocation)?,
+            #[cfg(feature = "macho")]
+            BinaryFormat::MachO => self.macho_fixup_relocation(&mut relocation),
+            _ => unimplemented!(),
+        };
+        if addend != 0 {
+            self.write_relocation_addend(section, &relocation, addend)?;
+        }
+        self.sections[section.0].relocations.push(relocation);
+        Ok(())
+    }
+
+    fn write_relocation_addend(
+        &mut self,
+        section: SectionId,
+        relocation: &Relocation,
+        addend: i64,
+    ) -> Result<()> {
+        let data = self.sections[section.0].data_mut();
+        let offset = relocation.offset as usize;
+        match relocation.size {
+            32 => data.write_at(offset, &U32::new(self.endian, addend as u32)),
+            64 => data.write_at(offset, &U64::new(self.endian, addend as u64)),
+            _ => {
+                return Err(Error(format!(
+                    "unimplemented relocation addend {:?}",
+                    relocation
+                )));
+            }
+        }
+        .map_err(|_| {
+            Error(format!(
+                "invalid relocation offset {}+{} (max {})",
+                relocation.offset,
+                relocation.size,
+                data.len()
+            ))
+        })
+    }
+
+    /// Write the object to a `Vec`.
+    pub fn write(&self) -> Result<Vec<u8>> {
+        let mut buffer = Vec::new();
+        self.emit(&mut buffer)?;
+        Ok(buffer)
+    }
+
+    /// Write the object to a `Write` implementation.
+    ///
+    /// Also flushes the writer.
+    ///
+    /// It is advisable to use a buffered writer like [`BufWriter`](std::io::BufWriter)
+    /// instead of an unbuffered writer like [`File`](std::fs::File).
+    #[cfg(feature = "std")]
+    pub fn write_stream<W: io::Write>(&self, w: W) -> result::Result<(), Box<dyn error::Error>> {
+        let mut stream = StreamingBuffer::new(w);
+        self.emit(&mut stream)?;
+        stream.result()?;
+        stream.into_inner().flush()?;
+        Ok(())
+    }
+
+    /// Write the object to a `WritableBuffer`.
+    pub fn emit(&self, buffer: &mut dyn WritableBuffer) -> Result<()> {
+        match self.format {
+            #[cfg(feature = "coff")]
+            BinaryFormat::Coff => self.coff_write(buffer),
+            #[cfg(feature = "elf")]
+            BinaryFormat::Elf => self.elf_write(buffer),
+            #[cfg(feature = "macho")]
+            BinaryFormat::MachO => self.macho_write(buffer),
+            _ => unimplemented!(),
+        }
+    }
+}
+
+/// A standard segment kind.
+#[allow(missing_docs)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[non_exhaustive]
+pub enum StandardSegment {
+    Text,
+    Data,
+    Debug,
+}
+
+/// A standard section kind.
+#[allow(missing_docs)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[non_exhaustive]
+pub enum StandardSection {
+    Text,
+    Data,
+    ReadOnlyData,
+    ReadOnlyDataWithRel,
+    ReadOnlyString,
+    UninitializedData,
+    Tls,
+    /// Zero-fill TLS initializers. Unsupported for COFF.
+    UninitializedTls,
+    /// TLS variable structures. Only supported for Mach-O.
+    TlsVariables,
+    /// Common data. Only supported for Mach-O.
+    Common,
+}
+
+impl StandardSection {
+    /// Return the section kind of a standard section.
+    pub fn kind(self) -> SectionKind {
+        match self {
+            StandardSection::Text => SectionKind::Text,
+            StandardSection::Data => SectionKind::Data,
+            StandardSection::ReadOnlyData => SectionKind::ReadOnlyData,
+            StandardSection::ReadOnlyDataWithRel => SectionKind::ReadOnlyDataWithRel,
+            StandardSection::ReadOnlyString => SectionKind::ReadOnlyString,
+            StandardSection::UninitializedData => SectionKind::UninitializedData,
+            StandardSection::Tls => SectionKind::Tls,
+            StandardSection::UninitializedTls => SectionKind::UninitializedTls,
+            StandardSection::TlsVariables => SectionKind::TlsVariables,
+            StandardSection::Common => SectionKind::Common,
+        }
+    }
+
+    // TODO: remembering to update this is error-prone, can we do better?
+    fn all() -> &'static [StandardSection] {
+        &[
+            StandardSection::Text,
+            StandardSection::Data,
+            StandardSection::ReadOnlyData,
+            StandardSection::ReadOnlyDataWithRel,
+            StandardSection::ReadOnlyString,
+            StandardSection::UninitializedData,
+            StandardSection::Tls,
+            StandardSection::UninitializedTls,
+            StandardSection::TlsVariables,
+            StandardSection::Common,
+        ]
+    }
+}
+
+/// An identifier used to reference a section.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub struct SectionId(usize);
+
+/// A section in an object file.
+#[derive(Debug)]
+pub struct Section<'a> {
+    segment: Vec<u8>,
+    name: Vec<u8>,
+    kind: SectionKind,
+    size: u64,
+    align: u64,
+    data: Cow<'a, [u8]>,
+    relocations: Vec<Relocation>,
+    symbol: Option<SymbolId>,
+    /// Section flags that are specific to each file format.
+    pub flags: SectionFlags,
+}
+
+impl<'a> Section<'a> {
+    /// Try to convert the name to a utf8 string.
+    #[inline]
+    pub fn name(&self) -> Option<&str> {
+        str::from_utf8(&self.name).ok()
+    }
+
+    /// Try to convert the segment to a utf8 string.
+    #[inline]
+    pub fn segment(&self) -> Option<&str> {
+        str::from_utf8(&self.segment).ok()
+    }
+
+    /// Return true if this section contains zerofill data.
+    #[inline]
+    pub fn is_bss(&self) -> bool {
+        self.kind.is_bss()
+    }
+
+    /// Set the data for a section.
+    ///
+    /// Must not be called for sections that already have data, or that contain uninitialized data.
+    pub fn set_data<T>(&mut self, data: T, align: u64)
+    where
+        T: Into<Cow<'a, [u8]>>,
+    {
+        debug_assert!(!self.is_bss());
+        debug_assert_eq!(align & (align - 1), 0);
+        debug_assert!(self.data.is_empty());
+        self.data = data.into();
+        self.size = self.data.len() as u64;
+        self.align = align;
+    }
+
+    /// Append data to a section.
+    ///
+    /// Must not be called for sections that contain uninitialized data.
+    pub fn append_data(&mut self, append_data: &[u8], align: u64) -> u64 {
+        debug_assert!(!self.is_bss());
+        debug_assert_eq!(align & (align - 1), 0);
+        if self.align < align {
+            self.align = align;
+        }
+        let align = align as usize;
+        let data = self.data.to_mut();
+        let mut offset = data.len();
+        if offset & (align - 1) != 0 {
+            offset += align - (offset & (align - 1));
+            data.resize(offset, 0);
+        }
+        data.extend_from_slice(append_data);
+        self.size = data.len() as u64;
+        offset as u64
+    }
+
+    /// Append unitialized data to a section.
+    ///
+    /// Must not be called for sections that contain initialized data.
+    pub fn append_bss(&mut self, size: u64, align: u64) -> u64 {
+        debug_assert!(self.is_bss());
+        debug_assert_eq!(align & (align - 1), 0);
+        if self.align < align {
+            self.align = align;
+        }
+        let mut offset = self.size;
+        if offset & (align - 1) != 0 {
+            offset += align - (offset & (align - 1));
+            self.size = offset;
+        }
+        self.size += size;
+        offset as u64
+    }
+
+    /// Returns the section as-built so far.
+    ///
+    /// This requires that the section is not a bss section.
+    pub fn data(&self) -> &[u8] {
+        debug_assert!(!self.is_bss());
+        &self.data
+    }
+
+    /// Returns the section as-built so far.
+    ///
+    /// This requires that the section is not a bss section.
+    pub fn data_mut(&mut self) -> &mut [u8] {
+        debug_assert!(!self.is_bss());
+        self.data.to_mut()
+    }
+}
+
+/// The section where a symbol is defined.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+#[non_exhaustive]
+pub enum SymbolSection {
+    /// The section is not applicable for this symbol (such as file symbols).
+    None,
+    /// The symbol is undefined.
+    Undefined,
+    /// The symbol has an absolute value.
+    Absolute,
+    /// The symbol is a zero-initialized symbol that will be combined with duplicate definitions.
+    Common,
+    /// The symbol is defined in the given section.
+    Section(SectionId),
+}
+
+impl SymbolSection {
+    /// Returns the section id for the section where the symbol is defined.
+    ///
+    /// May return `None` if the symbol is not defined in a section.
+    #[inline]
+    pub fn id(self) -> Option<SectionId> {
+        if let SymbolSection::Section(id) = self {
+            Some(id)
+        } else {
+            None
+        }
+    }
+}
+
+/// An identifier used to reference a symbol.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub struct SymbolId(usize);
+
+/// A symbol in an object file.
+#[derive(Debug)]
+pub struct Symbol {
+    /// The name of the symbol.
+    pub name: Vec<u8>,
+    /// The value of the symbol.
+    ///
+    /// If the symbol defined in a section, then this is the section offset of the symbol.
+    pub value: u64,
+    /// The size of the symbol.
+    pub size: u64,
+    /// The kind of the symbol.
+    pub kind: SymbolKind,
+    /// The scope of the symbol.
+    pub scope: SymbolScope,
+    /// Whether the symbol has weak binding.
+    pub weak: bool,
+    /// The section containing the symbol.
+    pub section: SymbolSection,
+    /// Symbol flags that are specific to each file format.
+    pub flags: SymbolFlags<SectionId>,
+}
+
+impl Symbol {
+    /// Try to convert the name to a utf8 string.
+    #[inline]
+    pub fn name(&self) -> Option<&str> {
+        str::from_utf8(&self.name).ok()
+    }
+
+    /// Return true if the symbol is undefined.
+    #[inline]
+    pub fn is_undefined(&self) -> bool {
+        self.section == SymbolSection::Undefined
+    }
+
+    /// Return true if the symbol is common data.
+    ///
+    /// Note: does not check for `SymbolSection::Section` with `SectionKind::Common`.
+    #[inline]
+    pub fn is_common(&self) -> bool {
+        self.section == SymbolSection::Common
+    }
+
+    /// Return true if the symbol scope is local.
+    #[inline]
+    pub fn is_local(&self) -> bool {
+        self.scope == SymbolScope::Compilation
+    }
+}
+
+/// A relocation in an object file.
+#[derive(Debug)]
+pub struct Relocation {
+    /// The section offset of the place of the relocation.
+    pub offset: u64,
+    /// The size in bits of the place of relocation.
+    pub size: u8,
+    /// The operation used to calculate the result of the relocation.
+    pub kind: RelocationKind,
+    /// Information about how the result of the relocation operation is encoded in the place.
+    pub encoding: RelocationEncoding,
+    /// The symbol referred to by the relocation.
+    ///
+    /// This may be a section symbol.
+    pub symbol: SymbolId,
+    /// The addend to use in the relocation calculation.
+    ///
+    /// This may be in addition to an implicit addend stored at the place of the relocation.
+    pub addend: i64,
+}
+
+/// An identifier used to reference a COMDAT section group.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub struct ComdatId(usize);
+
+/// A COMDAT section group.
+#[derive(Debug)]
+pub struct Comdat {
+    /// The COMDAT selection kind.
+    ///
+    /// This determines the way in which the linker resolves multiple definitions of the COMDAT
+    /// sections.
+    pub kind: ComdatKind,
+    /// The COMDAT symbol.
+    ///
+    /// If this symbol is referenced, then all sections in the group will be included by the
+    /// linker.
+    pub symbol: SymbolId,
+    /// The sections in the group.
+    pub sections: Vec<SectionId>,
+}
+
+/// The symbol name mangling scheme.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+#[non_exhaustive]
+pub enum Mangling {
+    /// No symbol mangling.
+    None,
+    /// Windows COFF symbol mangling.
+    Coff,
+    /// Windows COFF i386 symbol mangling.
+    CoffI386,
+    /// ELF symbol mangling.
+    Elf,
+    /// Mach-O symbol mangling.
+    MachO,
+}
+
+impl Mangling {
+    /// Return the default symboling mangling for the given format and architecture.
+    pub fn default(format: BinaryFormat, architecture: Architecture) -> Self {
+        match (format, architecture) {
+            (BinaryFormat::Coff, Architecture::I386) => Mangling::CoffI386,
+            (BinaryFormat::Coff, _) => Mangling::Coff,
+            (BinaryFormat::Elf, _) => Mangling::Elf,
+            (BinaryFormat::MachO, _) => Mangling::MachO,
+            _ => Mangling::None,
+        }
+    }
+
+    /// Return the prefix to use for global symbols.
+    pub fn global_prefix(self) -> Option<u8> {
+        match self {
+            Mangling::None | Mangling::Elf | Mangling::Coff => None,
+            Mangling::CoffI386 | Mangling::MachO => Some(b'_'),
+        }
+    }
+}
diff --git a/third_party/rust/object/src/write/pe.rs b/third_party/rust/object/src/write/pe.rs
new file mode 100644
index 0000000000..70da3a0937
--- /dev/null
+++ b/third_party/rust/object/src/write/pe.rs
@@ -0,0 +1,847 @@
+//! Helper for writing PE files.
+use alloc::string::String;
+use alloc::vec::Vec;
+use core::mem;
+
+use crate::endian::{LittleEndian as LE, *};
+use crate::pe;
+use crate::write::util;
+use crate::write::{Error, Result, WritableBuffer};
+
+/// A helper for writing PE files.
+///
+/// Writing uses a two phase approach. The first phase reserves file ranges and virtual
+/// address ranges for everything in the order that they will be written.
+///
+/// The second phase writes everything out in order. Thus the caller must ensure writing
+/// is in the same order that file ranges were reserved.
+#[allow(missing_debug_implementations)]
+pub struct Writer<'a> {
+    is_64: bool,
+    section_alignment: u32,
+    file_alignment: u32,
+
+    buffer: &'a mut dyn WritableBuffer,
+    len: u32,
+    virtual_len: u32,
+    headers_len: u32,
+
+    code_address: u32,
+    data_address: u32,
+    code_len: u32,
+    data_len: u32,
+    bss_len: u32,
+
+    nt_headers_offset: u32,
+    data_directories: Vec<DataDirectory>,
+    section_header_num: u16,
+    sections: Vec<Section>,
+
+    symbol_offset: u32,
+    symbol_num: u32,
+
+    reloc_blocks: Vec<RelocBlock>,
+    relocs: Vec<U16<LE>>,
+    reloc_offset: u32,
+}
+
+impl<'a> Writer<'a> {
+    /// Create a new `Writer`.
+    pub fn new(
+        is_64: bool,
+        section_alignment: u32,
+        file_alignment: u32,
+        buffer: &'a mut dyn WritableBuffer,
+    ) -> Self {
+        Writer {
+            is_64,
+            section_alignment,
+            file_alignment,
+
+            buffer,
+            len: 0,
+            virtual_len: 0,
+            headers_len: 0,
+
+            code_address: 0,
+            data_address: 0,
+            code_len: 0,
+            data_len: 0,
+            bss_len: 0,
+
+            nt_headers_offset: 0,
+            data_directories: Vec::new(),
+            section_header_num: 0,
+            sections: Vec::new(),
+
+            symbol_offset: 0,
+            symbol_num: 0,
+
+            reloc_blocks: Vec::new(),
+            relocs: Vec::new(),
+            reloc_offset: 0,
+        }
+    }
+
+    /// Return the current virtual address size that has been reserved.
+    ///
+    /// This is only valid after section headers have been reserved.
+    pub fn virtual_len(&self) -> u32 {
+        self.virtual_len
+    }
+
+    /// Reserve a virtual address range with the given size.
+    ///
+    /// The reserved length will be increased to match the section alignment.
+    ///
+    /// Returns the aligned offset of the start of the range.
+    pub fn reserve_virtual(&mut self, len: u32) -> u32 {
+        let offset = self.virtual_len;
+        self.virtual_len += len;
+        self.virtual_len = util::align_u32(self.virtual_len, self.section_alignment);
+        offset
+    }
+
+    /// Reserve up to the given virtual address.
+    ///
+    /// The reserved length will be increased to match the section alignment.
+    pub fn reserve_virtual_until(&mut self, address: u32) {
+        debug_assert!(self.virtual_len <= address);
+        self.virtual_len = util::align_u32(address, self.section_alignment);
+    }
+
+    /// Return the current file length that has been reserved.
+    pub fn reserved_len(&self) -> u32 {
+        self.len
+    }
+
+    /// Return the current file length that has been written.
+    #[allow(clippy::len_without_is_empty)]
+    pub fn len(&self) -> usize {
+        self.buffer.len()
+    }
+
+    /// Reserve a file range with the given size and starting alignment.
+    ///
+    /// Returns the aligned offset of the start of the range.
+    pub fn reserve(&mut self, len: u32, align_start: u32) -> u32 {
+        if len == 0 {
+            return self.len;
+        }
+        self.reserve_align(align_start);
+        let offset = self.len;
+        self.len += len;
+        offset
+    }
+
+    /// Reserve a file range with the given size and using the file alignment.
+    ///
+    /// Returns the aligned offset of the start of the range.
+    pub fn reserve_file(&mut self, len: u32) -> u32 {
+        self.reserve(len, self.file_alignment)
+    }
+
+    /// Write data.
+    pub fn write(&mut self, data: &[u8]) {
+        self.buffer.write_bytes(data);
+    }
+
+    /// Reserve alignment padding bytes.
+    pub fn reserve_align(&mut self, align_start: u32) {
+        self.len = util::align_u32(self.len, align_start);
+    }
+
+    /// Write alignment padding bytes.
+    pub fn write_align(&mut self, align_start: u32) {
+        util::write_align(self.buffer, align_start as usize);
+    }
+
+    /// Write padding up to the next multiple of file alignment.
+    pub fn write_file_align(&mut self) {
+        self.write_align(self.file_alignment);
+    }
+
+    /// Reserve the file range up to the given file offset.
+    pub fn reserve_until(&mut self, offset: u32) {
+        debug_assert!(self.len <= offset);
+        self.len = offset;
+    }
+
+    /// Write padding up to the given file offset.
+    pub fn pad_until(&mut self, offset: u32) {
+        debug_assert!(self.buffer.len() <= offset as usize);
+        self.buffer.resize(offset as usize);
+    }
+
+    /// Reserve the range for the DOS header.
+    ///
+    /// This must be at the start of the file.
+    ///
+    /// When writing, you may use `write_custom_dos_header` or `write_empty_dos_header`.
+    pub fn reserve_dos_header(&mut self) {
+        debug_assert_eq!(self.len, 0);
+        self.reserve(mem::size_of::<pe::ImageDosHeader>() as u32, 1);
+    }
+
+    /// Write a custom DOS header.
+    ///
+    /// This must be at the start of the file.
+    pub fn write_custom_dos_header(&mut self, dos_header: &pe::ImageDosHeader) -> Result<()> {
+        debug_assert_eq!(self.buffer.len(), 0);
+
+        // Start writing.
+        self.buffer
+            .reserve(self.len as usize)
+            .map_err(|_| Error(String::from("Cannot allocate buffer")))?;
+
+        self.buffer.write(dos_header);
+        Ok(())
+    }
+
+    /// Write the DOS header for a file without a stub.
+    ///
+    /// This must be at the start of the file.
+    ///
+    /// Uses default values for all fields.
+    pub fn write_empty_dos_header(&mut self) -> Result<()> {
+        self.write_custom_dos_header(&pe::ImageDosHeader {
+            e_magic: U16::new(LE, pe::IMAGE_DOS_SIGNATURE),
+            e_cblp: U16::new(LE, 0),
+            e_cp: U16::new(LE, 0),
+            e_crlc: U16::new(LE, 0),
+            e_cparhdr: U16::new(LE, 0),
+            e_minalloc: U16::new(LE, 0),
+            e_maxalloc: U16::new(LE, 0),
+            e_ss: U16::new(LE, 0),
+            e_sp: U16::new(LE, 0),
+            e_csum: U16::new(LE, 0),
+            e_ip: U16::new(LE, 0),
+            e_cs: U16::new(LE, 0),
+            e_lfarlc: U16::new(LE, 0),
+            e_ovno: U16::new(LE, 0),
+            e_res: [U16::new(LE, 0); 4],
+            e_oemid: U16::new(LE, 0),
+            e_oeminfo: U16::new(LE, 0),
+            e_res2: [U16::new(LE, 0); 10],
+            e_lfanew: U32::new(LE, self.nt_headers_offset),
+        })
+    }
+
+    /// Reserve a fixed DOS header and stub.
+    ///
+    /// Use `reserve_dos_header` and `reserve` if you need a custom stub.
+    pub fn reserve_dos_header_and_stub(&mut self) {
+        self.reserve_dos_header();
+        self.reserve(64, 1);
+    }
+
+    /// Write a fixed DOS header and stub.
+    ///
+    /// Use `write_custom_dos_header` and `write` if you need a custom stub.
+    pub fn write_dos_header_and_stub(&mut self) -> Result<()> {
+        self.write_custom_dos_header(&pe::ImageDosHeader {
+            e_magic: U16::new(LE, pe::IMAGE_DOS_SIGNATURE),
+            e_cblp: U16::new(LE, 0x90),
+            e_cp: U16::new(LE, 3),
+            e_crlc: U16::new(LE, 0),
+            e_cparhdr: U16::new(LE, 4),
+            e_minalloc: U16::new(LE, 0),
+            e_maxalloc: U16::new(LE, 0xffff),
+            e_ss: U16::new(LE, 0),
+            e_sp: U16::new(LE, 0xb8),
+            e_csum: U16::new(LE, 0),
+            e_ip: U16::new(LE, 0),
+            e_cs: U16::new(LE, 0),
+            e_lfarlc: U16::new(LE, 0x40),
+            e_ovno: U16::new(LE, 0),
+            e_res: [U16::new(LE, 0); 4],
+            e_oemid: U16::new(LE, 0),
+            e_oeminfo: U16::new(LE, 0),
+            e_res2: [U16::new(LE, 0); 10],
+            e_lfanew: U32::new(LE, self.nt_headers_offset),
+        })?;
+
+        #[rustfmt::skip]
+        self.buffer.write_bytes(&[
+            0x0e, 0x1f, 0xba, 0x0e, 0x00, 0xb4, 0x09, 0xcd,
+            0x21, 0xb8, 0x01, 0x4c, 0xcd, 0x21, 0x54, 0x68,
+            0x69, 0x73, 0x20, 0x70, 0x72, 0x6f, 0x67, 0x72,
+            0x61, 0x6d, 0x20, 0x63, 0x61, 0x6e, 0x6e, 0x6f,
+            0x74, 0x20, 0x62, 0x65, 0x20, 0x72, 0x75, 0x6e,
+            0x20, 0x69, 0x6e, 0x20, 0x44, 0x4f, 0x53, 0x20,
+            0x6d, 0x6f, 0x64, 0x65, 0x2e, 0x0d, 0x0d, 0x0a,
+            0x24, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+        ]);
+
+        Ok(())
+    }
+
+    fn nt_headers_size(&self) -> u32 {
+        if self.is_64 {
+            mem::size_of::<pe::ImageNtHeaders64>() as u32
+        } else {
+            mem::size_of::<pe::ImageNtHeaders32>() as u32
+        }
+    }
+
+    fn optional_header_size(&self) -> u32 {
+        let size = if self.is_64 {
+            mem::size_of::<pe::ImageOptionalHeader64>() as u32
+        } else {
+            mem::size_of::<pe::ImageOptionalHeader32>() as u32
+        };
+        size + self.data_directories.len() as u32 * mem::size_of::<pe::ImageDataDirectory>() as u32
+    }
+
+    /// Return the offset of the NT headers, if reserved.
+    pub fn nt_headers_offset(&self) -> u32 {
+        self.nt_headers_offset
+    }
+
+    /// Reserve the range for the NT headers.
+    pub fn reserve_nt_headers(&mut self, data_directory_num: usize) {
+        debug_assert_eq!(self.nt_headers_offset, 0);
+        self.nt_headers_offset = self.reserve(self.nt_headers_size(), 8);
+        self.data_directories = vec![DataDirectory::default(); data_directory_num];
+        self.reserve(
+            data_directory_num as u32 * mem::size_of::<pe::ImageDataDirectory>() as u32,
+            1,
+        );
+    }
+
+    /// Set the virtual address and size of a data directory.
+    pub fn set_data_directory(&mut self, index: usize, virtual_address: u32, size: u32) {
+        self.data_directories[index] = DataDirectory {
+            virtual_address,
+            size,
+        }
+    }
+
+    /// Write the NT headers.
+    pub fn write_nt_headers(&mut self, nt_headers: NtHeaders) {
+        self.pad_until(self.nt_headers_offset);
+        self.buffer.write(&U32::new(LE, pe::IMAGE_NT_SIGNATURE));
+        let file_header = pe::ImageFileHeader {
+            machine: U16::new(LE, nt_headers.machine),
+            number_of_sections: U16::new(LE, self.section_header_num),
+            time_date_stamp: U32::new(LE, nt_headers.time_date_stamp),
+            pointer_to_symbol_table: U32::new(LE, self.symbol_offset),
+            number_of_symbols: U32::new(LE, self.symbol_num),
+            size_of_optional_header: U16::new(LE, self.optional_header_size() as u16),
+            characteristics: U16::new(LE, nt_headers.characteristics),
+        };
+        self.buffer.write(&file_header);
+        if self.is_64 {
+            let optional_header = pe::ImageOptionalHeader64 {
+                magic: U16::new(LE, pe::IMAGE_NT_OPTIONAL_HDR64_MAGIC),
+                major_linker_version: nt_headers.major_linker_version,
+                minor_linker_version: nt_headers.minor_linker_version,
+                size_of_code: U32::new(LE, self.code_len),
+                size_of_initialized_data: U32::new(LE, self.data_len),
+                size_of_uninitialized_data: U32::new(LE, self.bss_len),
+                address_of_entry_point: U32::new(LE, nt_headers.address_of_entry_point),
+                base_of_code: U32::new(LE, self.code_address),
+                image_base: U64::new(LE, nt_headers.image_base),
+                section_alignment: U32::new(LE, self.section_alignment),
+                file_alignment: U32::new(LE, self.file_alignment),
+                major_operating_system_version: U16::new(
+                    LE,
+                    nt_headers.major_operating_system_version,
+                ),
+                minor_operating_system_version: U16::new(
+                    LE,
+                    nt_headers.minor_operating_system_version,
+                ),
+                major_image_version: U16::new(LE, nt_headers.major_image_version),
+                minor_image_version: U16::new(LE, nt_headers.minor_image_version),
+                major_subsystem_version: U16::new(LE, nt_headers.major_subsystem_version),
+                minor_subsystem_version: U16::new(LE, nt_headers.minor_subsystem_version),
+                win32_version_value: U32::new(LE, 0),
+                size_of_image: U32::new(LE, self.virtual_len),
+                size_of_headers: U32::new(LE, self.headers_len),
+                check_sum: U32::new(LE, 0),
+                subsystem: U16::new(LE, nt_headers.subsystem),
+                dll_characteristics: U16::new(LE, nt_headers.dll_characteristics),
+                size_of_stack_reserve: U64::new(LE, nt_headers.size_of_stack_reserve),
+                size_of_stack_commit: U64::new(LE, nt_headers.size_of_stack_commit),
+                size_of_heap_reserve: U64::new(LE, nt_headers.size_of_heap_reserve),
+                size_of_heap_commit: U64::new(LE, nt_headers.size_of_heap_commit),
+                loader_flags: U32::new(LE, 0),
+                number_of_rva_and_sizes: U32::new(LE, self.data_directories.len() as u32),
+            };
+            self.buffer.write(&optional_header);
+        } else {
+            let optional_header = pe::ImageOptionalHeader32 {
+                magic: U16::new(LE, pe::IMAGE_NT_OPTIONAL_HDR32_MAGIC),
+                major_linker_version: nt_headers.major_linker_version,
+                minor_linker_version: nt_headers.minor_linker_version,
+                size_of_code: U32::new(LE, self.code_len),
+                size_of_initialized_data: U32::new(LE, self.data_len),
+                size_of_uninitialized_data: U32::new(LE, self.bss_len),
+                address_of_entry_point: U32::new(LE, nt_headers.address_of_entry_point),
+                base_of_code: U32::new(LE, self.code_address),
+                base_of_data: U32::new(LE, self.data_address),
+                image_base: U32::new(LE, nt_headers.image_base as u32),
+                section_alignment: U32::new(LE, self.section_alignment),
+                file_alignment: U32::new(LE, self.file_alignment),
+                major_operating_system_version: U16::new(
+                    LE,
+                    nt_headers.major_operating_system_version,
+                ),
+                minor_operating_system_version: U16::new(
+                    LE,
+                    nt_headers.minor_operating_system_version,
+                ),
+                major_image_version: U16::new(LE, nt_headers.major_image_version),
+                minor_image_version: U16::new(LE, nt_headers.minor_image_version),
+                major_subsystem_version: U16::new(LE, nt_headers.major_subsystem_version),
+                minor_subsystem_version: U16::new(LE, nt_headers.minor_subsystem_version),
+                win32_version_value: U32::new(LE, 0),
+                size_of_image: U32::new(LE, self.virtual_len),
+                size_of_headers: U32::new(LE, self.headers_len),
+                check_sum: U32::new(LE, 0),
+                subsystem: U16::new(LE, nt_headers.subsystem),
+                dll_characteristics: U16::new(LE, nt_headers.dll_characteristics),
+                size_of_stack_reserve: U32::new(LE, nt_headers.size_of_stack_reserve as u32),
+                size_of_stack_commit: U32::new(LE, nt_headers.size_of_stack_commit as u32),
+                size_of_heap_reserve: U32::new(LE, nt_headers.size_of_heap_reserve as u32),
+                size_of_heap_commit: U32::new(LE, nt_headers.size_of_heap_commit as u32),
+                loader_flags: U32::new(LE, 0),
+                number_of_rva_and_sizes: U32::new(LE, self.data_directories.len() as u32),
+            };
+            self.buffer.write(&optional_header);
+        }
+
+        for dir in &self.data_directories {
+            self.buffer.write(&pe::ImageDataDirectory {
+                virtual_address: U32::new(LE, dir.virtual_address),
+                size: U32::new(LE, dir.size),
+            })
+        }
+    }
+
+    /// Reserve the section headers.
+    ///
+    /// The number of reserved section headers must be the same as the number of sections that
+    /// are later reserved.
+    // TODO: change this to a maximum number of sections?
+    pub fn reserve_section_headers(&mut self, section_header_num: u16) {
+        debug_assert_eq!(self.section_header_num, 0);
+        self.section_header_num = section_header_num;
+        self.reserve(
+            u32::from(section_header_num) * mem::size_of::<pe::ImageSectionHeader>() as u32,
+            1,
+        );
+        // Padding before sections must be included in headers_len.
+        self.reserve_align(self.file_alignment);
+        self.headers_len = self.len;
+        self.reserve_virtual(self.len);
+    }
+
+    /// Write the section headers.
+    ///
+    /// This uses information that was recorded when the sections were reserved.
+    pub fn write_section_headers(&mut self) {
+        debug_assert_eq!(self.section_header_num as usize, self.sections.len());
+        for section in &self.sections {
+            let section_header = pe::ImageSectionHeader {
+                name: section.name,
+                virtual_size: U32::new(LE, section.range.virtual_size),
+                virtual_address: U32::new(LE, section.range.virtual_address),
+                size_of_raw_data: U32::new(LE, section.range.file_size),
+                pointer_to_raw_data: U32::new(LE, section.range.file_offset),
+                pointer_to_relocations: U32::new(LE, 0),
+                pointer_to_linenumbers: U32::new(LE, 0),
+                number_of_relocations: U16::new(LE, 0),
+                number_of_linenumbers: U16::new(LE, 0),
+                characteristics: U32::new(LE, section.characteristics),
+            };
+            self.buffer.write(&section_header);
+        }
+    }
+
+    /// Reserve a section.
+    ///
+    /// Returns the file range and virtual address range that are reserved
+    /// for the section.
+    pub fn reserve_section(
+        &mut self,
+        name: [u8; 8],
+        characteristics: u32,
+        virtual_size: u32,
+        data_size: u32,
+    ) -> SectionRange {
+        let virtual_address = self.reserve_virtual(virtual_size);
+
+        // Padding after section must be included in section file size.
+        let file_size = util::align_u32(data_size, self.file_alignment);
+        let file_offset = if file_size != 0 {
+            self.reserve(file_size, self.file_alignment)
+        } else {
+            0
+        };
+
+        // Sizes in optional header use the virtual size with the file alignment.
+        let aligned_virtual_size = util::align_u32(virtual_size, self.file_alignment);
+        if characteristics & pe::IMAGE_SCN_CNT_CODE != 0 {
+            if self.code_address == 0 {
+                self.code_address = virtual_address;
+            }
+            self.code_len += aligned_virtual_size;
+        } else if characteristics & pe::IMAGE_SCN_CNT_INITIALIZED_DATA != 0 {
+            if self.data_address == 0 {
+                self.data_address = virtual_address;
+            }
+            self.data_len += aligned_virtual_size;
+        } else if characteristics & pe::IMAGE_SCN_CNT_UNINITIALIZED_DATA != 0 {
+            if self.data_address == 0 {
+                self.data_address = virtual_address;
+            }
+            self.bss_len += aligned_virtual_size;
+        }
+
+        let range = SectionRange {
+            virtual_address,
+            virtual_size,
+            file_offset,
+            file_size,
+        };
+        self.sections.push(Section {
+            name,
+            characteristics,
+            range,
+        });
+        range
+    }
+
+    /// Write the data for a section.
+    pub fn write_section(&mut self, offset: u32, data: &[u8]) {
+        if data.is_empty() {
+            return;
+        }
+        self.pad_until(offset);
+        self.write(data);
+        self.write_align(self.file_alignment);
+    }
+
+    /// Reserve a `.text` section.
+    ///
+    /// Contains executable code.
+    pub fn reserve_text_section(&mut self, size: u32) -> SectionRange {
+        self.reserve_section(
+            *b".text\0\0\0",
+            pe::IMAGE_SCN_CNT_CODE | pe::IMAGE_SCN_MEM_EXECUTE | pe::IMAGE_SCN_MEM_READ,
+            size,
+            size,
+        )
+    }
+
+    /// Reserve a `.data` section.
+    ///
+    /// Contains initialized data.
+    ///
+    /// May also contain uninitialized data if `virtual_size` is greater than `data_size`.
+    pub fn reserve_data_section(&mut self, virtual_size: u32, data_size: u32) -> SectionRange {
+        self.reserve_section(
+            *b".data\0\0\0",
+            pe::IMAGE_SCN_CNT_INITIALIZED_DATA | pe::IMAGE_SCN_MEM_READ | pe::IMAGE_SCN_MEM_WRITE,
+            virtual_size,
+            data_size,
+        )
+    }
+
+    /// Reserve a `.rdata` section.
+    ///
+    /// Contains read-only initialized data.
+    pub fn reserve_rdata_section(&mut self, size: u32) -> SectionRange {
+        self.reserve_section(
+            *b".rdata\0\0",
+            pe::IMAGE_SCN_CNT_INITIALIZED_DATA | pe::IMAGE_SCN_MEM_READ,
+            size,
+            size,
+        )
+    }
+
+    /// Reserve a `.bss` section.
+    ///
+    /// Contains uninitialized data.
+    pub fn reserve_bss_section(&mut self, size: u32) -> SectionRange {
+        self.reserve_section(
+            *b".bss\0\0\0\0",
+            pe::IMAGE_SCN_CNT_UNINITIALIZED_DATA | pe::IMAGE_SCN_MEM_READ | pe::IMAGE_SCN_MEM_WRITE,
+            size,
+            0,
+        )
+    }
+
+    /// Reserve an `.idata` section.
+    ///
+    /// Contains import tables. Note that it is permissible to store import tables in a different
+    /// section.
+    ///
+    /// This also sets the `pe::IMAGE_DIRECTORY_ENTRY_IMPORT` data directory.
+    pub fn reserve_idata_section(&mut self, size: u32) -> SectionRange {
+        let range = self.reserve_section(
+            *b".idata\0\0",
+            pe::IMAGE_SCN_CNT_INITIALIZED_DATA | pe::IMAGE_SCN_MEM_READ | pe::IMAGE_SCN_MEM_WRITE,
+            size,
+            size,
+        );
+        let dir = &mut self.data_directories[pe::IMAGE_DIRECTORY_ENTRY_IMPORT];
+        debug_assert_eq!(dir.virtual_address, 0);
+        *dir = DataDirectory {
+            virtual_address: range.virtual_address,
+            size,
+        };
+        range
+    }
+
+    /// Reserve an `.edata` section.
+    ///
+    /// Contains export tables.
+    ///
+    /// This also sets the `pe::IMAGE_DIRECTORY_ENTRY_EXPORT` data directory.
+    pub fn reserve_edata_section(&mut self, size: u32) -> SectionRange {
+        let range = self.reserve_section(
+            *b".edata\0\0",
+            pe::IMAGE_SCN_CNT_INITIALIZED_DATA | pe::IMAGE_SCN_MEM_READ,
+            size,
+            size,
+        );
+        let dir = &mut self.data_directories[pe::IMAGE_DIRECTORY_ENTRY_EXPORT];
+        debug_assert_eq!(dir.virtual_address, 0);
+        *dir = DataDirectory {
+            virtual_address: range.virtual_address,
+            size,
+        };
+        range
+    }
+
+    /// Reserve a `.pdata` section.
+    ///
+    /// Contains exception information.
+    ///
+    /// This also sets the `pe::IMAGE_DIRECTORY_ENTRY_EXCEPTION` data directory.
+    pub fn reserve_pdata_section(&mut self, size: u32) -> SectionRange {
+        let range = self.reserve_section(
+            *b".pdata\0\0",
+            pe::IMAGE_SCN_CNT_INITIALIZED_DATA | pe::IMAGE_SCN_MEM_READ,
+            size,
+            size,
+        );
+        let dir = &mut self.data_directories[pe::IMAGE_DIRECTORY_ENTRY_EXCEPTION];
+        debug_assert_eq!(dir.virtual_address, 0);
+        *dir = DataDirectory {
+            virtual_address: range.virtual_address,
+            size,
+        };
+        range
+    }
+
+    /// Reserve a `.xdata` section.
+    ///
+    /// Contains exception information.
+    pub fn reserve_xdata_section(&mut self, size: u32) -> SectionRange {
+        self.reserve_section(
+            *b".xdata\0\0",
+            pe::IMAGE_SCN_CNT_INITIALIZED_DATA | pe::IMAGE_SCN_MEM_READ,
+            size,
+            size,
+        )
+    }
+
+    /// Reserve a `.rsrc` section.
+    ///
+    /// Contains the resource directory.
+    ///
+    /// This also sets the `pe::IMAGE_DIRECTORY_ENTRY_RESOURCE` data directory.
+    pub fn reserve_rsrc_section(&mut self, size: u32) -> SectionRange {
+        let range = self.reserve_section(
+            *b".rsrc\0\0\0",
+            pe::IMAGE_SCN_CNT_INITIALIZED_DATA | pe::IMAGE_SCN_MEM_READ,
+            size,
+            size,
+        );
+        let dir = &mut self.data_directories[pe::IMAGE_DIRECTORY_ENTRY_RESOURCE];
+        debug_assert_eq!(dir.virtual_address, 0);
+        *dir = DataDirectory {
+            virtual_address: range.virtual_address,
+            size,
+        };
+        range
+    }
+
+    /// Add a base relocation.
+    ///
+    /// `typ` must be one of the `IMAGE_REL_BASED_*` constants.
+    pub fn add_reloc(&mut self, mut virtual_address: u32, typ: u16) {
+        let reloc = U16::new(LE, typ << 12 | (virtual_address & 0xfff) as u16);
+        virtual_address &= !0xfff;
+        if let Some(block) = self.reloc_blocks.last_mut() {
+            if block.virtual_address == virtual_address {
+                self.relocs.push(reloc);
+                block.count += 1;
+                return;
+            }
+            // Blocks must have an even number of relocations.
+            if block.count & 1 != 0 {
+                self.relocs.push(U16::new(LE, 0));
+                block.count += 1;
+            }
+            debug_assert!(block.virtual_address < virtual_address);
+        }
+        self.relocs.push(reloc);
+        self.reloc_blocks.push(RelocBlock {
+            virtual_address,
+            count: 1,
+        });
+    }
+
+    /// Return true if a base relocation has been added.
+    pub fn has_relocs(&mut self) -> bool {
+        !self.relocs.is_empty()
+    }
+
+    /// Reserve a `.reloc` section.
+    ///
+    /// This contains the base relocations that were added with `add_reloc`.
+    ///
+    /// This also sets the `pe::IMAGE_DIRECTORY_ENTRY_BASERELOC` data directory.
+    pub fn reserve_reloc_section(&mut self) -> SectionRange {
+        if let Some(block) = self.reloc_blocks.last_mut() {
+            // Blocks must have an even number of relocations.
+            if block.count & 1 != 0 {
+                self.relocs.push(U16::new(LE, 0));
+                block.count += 1;
+            }
+        }
+        let size = self.reloc_blocks.iter().map(RelocBlock::size).sum();
+        let range = self.reserve_section(
+            *b".reloc\0\0",
+            pe::IMAGE_SCN_CNT_INITIALIZED_DATA
+                | pe::IMAGE_SCN_MEM_READ
+                | pe::IMAGE_SCN_MEM_DISCARDABLE,
+            size,
+            size,
+        );
+        let dir = &mut self.data_directories[pe::IMAGE_DIRECTORY_ENTRY_BASERELOC];
+        debug_assert_eq!(dir.virtual_address, 0);
+        *dir = DataDirectory {
+            virtual_address: range.virtual_address,
+            size,
+        };
+        self.reloc_offset = range.file_offset;
+        range
+    }
+
+    /// Write a `.reloc` section.
+    ///
+    /// This contains the base relocations that were added with `add_reloc`.
+    pub fn write_reloc_section(&mut self) {
+        if self.reloc_offset == 0 {
+            return;
+        }
+        self.pad_until(self.reloc_offset);
+
+        let mut total = 0;
+        for block in &self.reloc_blocks {
+            self.buffer.write(&pe::ImageBaseRelocation {
+                virtual_address: U32::new(LE, block.virtual_address),
+                size_of_block: U32::new(LE, block.size()),
+            });
+            self.buffer
+                .write_slice(&self.relocs[total..][..block.count as usize]);
+            total += block.count as usize;
+        }
+        debug_assert_eq!(total, self.relocs.len());
+
+        self.write_align(self.file_alignment);
+    }
+
+    /// Reserve the certificate table.
+    ///
+    /// This also sets the `pe::IMAGE_DIRECTORY_ENTRY_SECURITY` data directory.
+    // TODO: reserve individual certificates
+    pub fn reserve_certificate_table(&mut self, size: u32) {
+        let size = util::align_u32(size, 8);
+        let offset = self.reserve(size, 8);
+        let dir = &mut self.data_directories[pe::IMAGE_DIRECTORY_ENTRY_SECURITY];
+        debug_assert_eq!(dir.virtual_address, 0);
+        *dir = DataDirectory {
+            virtual_address: offset,
+            size,
+        };
+    }
+
+    /// Write the certificate table.
+    // TODO: write individual certificates
+    pub fn write_certificate_table(&mut self, data: &[u8]) {
+        let dir = self.data_directories[pe::IMAGE_DIRECTORY_ENTRY_SECURITY];
+        self.pad_until(dir.virtual_address);
+        self.write(data);
+        self.pad_until(dir.virtual_address + dir.size);
+    }
+}
+
+/// Information required for writing [`pe::ImageNtHeaders32`] or [`pe::ImageNtHeaders64`].
+#[allow(missing_docs)]
+#[derive(Debug, Clone)]
+pub struct NtHeaders {
+    // ImageFileHeader
+    pub machine: u16,
+    pub time_date_stamp: u32,
+    pub characteristics: u16,
+    // ImageOptionalHeader
+    pub major_linker_version: u8,
+    pub minor_linker_version: u8,
+    pub address_of_entry_point: u32,
+    pub image_base: u64,
+    pub major_operating_system_version: u16,
+    pub minor_operating_system_version: u16,
+    pub major_image_version: u16,
+    pub minor_image_version: u16,
+    pub major_subsystem_version: u16,
+    pub minor_subsystem_version: u16,
+    pub subsystem: u16,
+    pub dll_characteristics: u16,
+    pub size_of_stack_reserve: u64,
+    pub size_of_stack_commit: u64,
+    pub size_of_heap_reserve: u64,
+    pub size_of_heap_commit: u64,
+}
+
+#[derive(Default, Clone, Copy)]
+struct DataDirectory {
+    virtual_address: u32,
+    size: u32,
+}
+
+/// Information required for writing [`pe::ImageSectionHeader`].
+#[allow(missing_docs)]
+#[derive(Debug, Clone)]
+pub struct Section {
+    pub name: [u8; pe::IMAGE_SIZEOF_SHORT_NAME],
+    pub characteristics: u32,
+    pub range: SectionRange,
+}
+
+/// The file range and virtual address range for a section.
+#[allow(missing_docs)]
+#[derive(Debug, Default, Clone, Copy)]
+pub struct SectionRange {
+    pub virtual_address: u32,
+    pub virtual_size: u32,
+    pub file_offset: u32,
+    pub file_size: u32,
+}
+
+struct RelocBlock {
+    virtual_address: u32,
+    count: u32,
+}
+
+impl RelocBlock {
+    fn size(&self) -> u32 {
+        mem::size_of::<pe::ImageBaseRelocation>() as u32 + self.count * mem::size_of::<u16>() as u32
+    }
+}
diff --git a/third_party/rust/object/src/write/string.rs b/third_party/rust/object/src/write/string.rs
new file mode 100644
index 0000000000..3bdfcccaaf
--- /dev/null
+++ b/third_party/rust/object/src/write/string.rs
@@ -0,0 +1,159 @@
+use alloc::vec::Vec;
+
+#[cfg(feature = "std")]
+type IndexSet<K> = indexmap::IndexSet<K>;
+#[cfg(not(feature = "std"))]
+type IndexSet<K> = indexmap::IndexSet<K, hashbrown::hash_map::DefaultHashBuilder>;
+
+/// An identifer for an entry in a string table.
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub struct StringId(usize);
+
+#[derive(Debug, Default)]
+pub(crate) struct StringTable<'a> {
+    strings: IndexSet<&'a [u8]>,
+    offsets: Vec<usize>,
+}
+
+impl<'a> StringTable<'a> {
+    /// Add a string to the string table.
+    ///
+    /// Panics if the string table has already been written, or
+    /// if the string contains a null byte.
+    pub fn add(&mut self, string: &'a [u8]) -> StringId {
+        assert!(self.offsets.is_empty());
+        assert!(!string.contains(&0));
+        let id = self.strings.insert_full(string).0;
+        StringId(id)
+    }
+
+    /// Return the id of the given string.
+    ///
+    /// Panics if the string is not in the string table.
+    pub fn get_id(&self, string: &[u8]) -> StringId {
+        let id = self.strings.get_index_of(string).unwrap();
+        StringId(id)
+    }
+
+    /// Return the string for the given id.
+    ///
+    /// Panics if the string is not in the string table.
+    pub fn get_string(&self, id: StringId) -> &'a [u8] {
+        self.strings.get_index(id.0).unwrap()
+    }
+
+    /// Return the offset of the given string.
+    ///
+    /// Panics if the string table has not been written, or
+    /// if the string is not in the string table.
+    pub fn get_offset(&self, id: StringId) -> usize {
+        self.offsets[id.0]
+    }
+
+    /// Append the string table to the given `Vec`, and
+    /// calculate the list of string offsets.
+    ///
+    /// `base` is the initial string table offset. For example,
+    /// this should be 1 for ELF, to account for the initial
+    /// null byte (which must have been written by the caller).
+    pub fn write(&mut self, base: usize, w: &mut Vec<u8>) {
+        assert!(self.offsets.is_empty());
+
+        let mut ids: Vec<_> = (0..self.strings.len()).collect();
+        sort(&mut ids, 1, &self.strings);
+
+        self.offsets = vec![0; ids.len()];
+        let mut offset = base;
+        let mut previous = &[][..];
+        for id in ids {
+            let string = self.strings.get_index(id).unwrap();
+            if previous.ends_with(string) {
+                self.offsets[id] = offset - string.len() - 1;
+            } else {
+                self.offsets[id] = offset;
+                w.extend_from_slice(string);
+                w.push(0);
+                offset += string.len() + 1;
+                previous = string;
+            }
+        }
+    }
+}
+
+// Multi-key quicksort.
+//
+// Ordering is such that if a string is a suffix of at least one other string,
+// then it is placed immediately after one of those strings. That is:
+// - comparison starts at the end of the string
+// - shorter strings come later
+//
+// Based on the implementation in LLVM.
+fn sort(mut ids: &mut [usize], mut pos: usize, strings: &IndexSet<&[u8]>) {
+    loop {
+        if ids.len() <= 1 {
+            return;
+        }
+
+        let pivot = byte(ids[0], pos, strings);
+        let mut lower = 0;
+        let mut upper = ids.len();
+        let mut i = 1;
+        while i < upper {
+            let b = byte(ids[i], pos, strings);
+            if b > pivot {
+                ids.swap(lower, i);
+                lower += 1;
+                i += 1;
+            } else if b < pivot {
+                upper -= 1;
+                ids.swap(upper, i);
+            } else {
+                i += 1;
+            }
+        }
+
+        sort(&mut ids[..lower], pos, strings);
+        sort(&mut ids[upper..], pos, strings);
+
+        if pivot == 0 {
+            return;
+        }
+        ids = &mut ids[lower..upper];
+        pos += 1;
+    }
+}
+
+fn byte(id: usize, pos: usize, strings: &IndexSet<&[u8]>) -> u8 {
+    let string = strings.get_index(id).unwrap();
+    let len = string.len();
+    if len >= pos {
+        string[len - pos]
+    } else {
+        // We know the strings don't contain null bytes.
+        0
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn string_table() {
+        let mut table = StringTable::default();
+        let id0 = table.add(b"");
+        let id1 = table.add(b"foo");
+        let id2 = table.add(b"bar");
+        let id3 = table.add(b"foobar");
+
+        let mut data = Vec::new();
+        data.push(0);
+        table.write(1, &mut data);
+        assert_eq!(data, b"\0foobar\0foo\0");
+
+        assert_eq!(table.get_offset(id0), 11);
+        assert_eq!(table.get_offset(id1), 8);
+        assert_eq!(table.get_offset(id2), 4);
+        assert_eq!(table.get_offset(id3), 1);
+    }
+}
diff --git a/third_party/rust/object/src/write/util.rs b/third_party/rust/object/src/write/util.rs
new file mode 100644
index 0000000000..51bc3515f2
--- /dev/null
+++ b/third_party/rust/object/src/write/util.rs
@@ -0,0 +1,210 @@
+use alloc::vec::Vec;
+#[cfg(feature = "std")]
+use std::{io, mem};
+
+use crate::pod::{bytes_of, bytes_of_slice, Pod};
+
+/// Trait for writable buffer.
+#[allow(clippy::len_without_is_empty)]
+pub trait WritableBuffer {
+    /// Returns position/offset for data to be written at.
+    ///
+    /// Should only be used in debug assertions
+    fn len(&self) -> usize;
+
+    /// Reserves specified number of bytes in the buffer.
+    ///
+    /// This will be called exactly once before writing anything to the buffer,
+    /// and the given size is the exact total number of bytes that will be written.
+    fn reserve(&mut self, size: usize) -> Result<(), ()>;
+
+    /// Writes zero bytes at the end of the buffer until the buffer
+    /// has the specified length.
+    fn resize(&mut self, new_len: usize);
+
+    /// Writes the specified slice of bytes at the end of the buffer.
+    fn write_bytes(&mut self, val: &[u8]);
+
+    /// Writes the specified `Pod` type at the end of the buffer.
+    fn write_pod<T: Pod>(&mut self, val: &T)
+    where
+        Self: Sized,
+    {
+        self.write_bytes(bytes_of(val))
+    }
+
+    /// Writes the specified `Pod` slice at the end of the buffer.
+    fn write_pod_slice<T: Pod>(&mut self, val: &[T])
+    where
+        Self: Sized,
+    {
+        self.write_bytes(bytes_of_slice(val))
+    }
+}
+
+impl<'a> dyn WritableBuffer + 'a {
+    /// Writes the specified `Pod` type at the end of the buffer.
+    pub fn write<T: Pod>(&mut self, val: &T) {
+        self.write_bytes(bytes_of(val))
+    }
+
+    /// Writes the specified `Pod` slice at the end of the buffer.
+    pub fn write_slice<T: Pod>(&mut self, val: &[T]) {
+        self.write_bytes(bytes_of_slice(val))
+    }
+}
+
+impl WritableBuffer for Vec<u8> {
+    #[inline]
+    fn len(&self) -> usize {
+        self.len()
+    }
+
+    #[inline]
+    fn reserve(&mut self, size: usize) -> Result<(), ()> {
+        debug_assert!(self.is_empty());
+        self.reserve(size);
+        Ok(())
+    }
+
+    #[inline]
+    fn resize(&mut self, new_len: usize) {
+        debug_assert!(new_len >= self.len());
+        self.resize(new_len, 0);
+    }
+
+    #[inline]
+    fn write_bytes(&mut self, val: &[u8]) {
+        debug_assert!(self.len() + val.len() <= self.capacity());
+        self.extend_from_slice(val)
+    }
+}
+
+/// A [`WritableBuffer`] that streams data to a [`Write`](std::io::Write) implementation.
+///
+/// [`Self::result`] must be called to determine if an I/O error occurred during writing.
+///
+/// It is advisable to use a buffered writer like [`BufWriter`](std::io::BufWriter)
+/// instead of an unbuffered writer like [`File`](std::fs::File).
+#[cfg(feature = "std")]
+#[derive(Debug)]
+pub struct StreamingBuffer<W> {
+    writer: W,
+    len: usize,
+    result: Result<(), io::Error>,
+}
+
+#[cfg(feature = "std")]
+impl<W> StreamingBuffer<W> {
+    /// Create a new `StreamingBuffer` backed by the given writer.
+    pub fn new(writer: W) -> Self {
+        StreamingBuffer {
+            writer,
+            len: 0,
+            result: Ok(()),
+        }
+    }
+
+    /// Unwraps this [`StreamingBuffer`] giving back the original writer.
+    pub fn into_inner(self) -> W {
+        self.writer
+    }
+
+    /// Returns any error that occurred during writing.
+    pub fn result(&mut self) -> Result<(), io::Error> {
+        mem::replace(&mut self.result, Ok(()))
+    }
+}
+
+#[cfg(feature = "std")]
+impl<W: io::Write> WritableBuffer for StreamingBuffer<W> {
+    #[inline]
+    fn len(&self) -> usize {
+        self.len
+    }
+
+    #[inline]
+    fn reserve(&mut self, _size: usize) -> Result<(), ()> {
+        Ok(())
+    }
+
+    #[inline]
+    fn resize(&mut self, new_len: usize) {
+        debug_assert!(self.len <= new_len);
+        while self.len < new_len {
+            let write_amt = (new_len - self.len - 1) % 1024 + 1;
+            self.write_bytes(&[0; 1024][..write_amt]);
+        }
+    }
+
+    #[inline]
+    fn write_bytes(&mut self, val: &[u8]) {
+        if self.result.is_ok() {
+            self.result = self.writer.write_all(val);
+        }
+        self.len += val.len();
+    }
+}
+
+/// A trait for mutable byte slices.
+///
+/// It provides convenience methods for `Pod` types.
+pub(crate) trait BytesMut {
+    fn write_at<T: Pod>(self, offset: usize, val: &T) -> Result<(), ()>;
+}
+
+impl<'a> BytesMut for &'a mut [u8] {
+    #[inline]
+    fn write_at<T: Pod>(self, offset: usize, val: &T) -> Result<(), ()> {
+        let src = bytes_of(val);
+        let dest = self.get_mut(offset..).ok_or(())?;
+        let dest = dest.get_mut(..src.len()).ok_or(())?;
+        dest.copy_from_slice(src);
+        Ok(())
+    }
+}
+
+pub(crate) fn align(offset: usize, size: usize) -> usize {
+    (offset + (size - 1)) & !(size - 1)
+}
+
+#[allow(dead_code)]
+pub(crate) fn align_u32(offset: u32, size: u32) -> u32 {
+    (offset + (size - 1)) & !(size - 1)
+}
+
+#[allow(dead_code)]
+pub(crate) fn align_u64(offset: u64, size: u64) -> u64 {
+    (offset + (size - 1)) & !(size - 1)
+}
+
+pub(crate) fn write_align(buffer: &mut dyn WritableBuffer, size: usize) {
+    let new_len = align(buffer.len(), size);
+    buffer.resize(new_len);
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn bytes_mut() {
+        let data = vec![0x01, 0x23, 0x45, 0x67];
+
+        let mut bytes = data.clone();
+        bytes.extend_from_slice(bytes_of(&u16::to_be(0x89ab)));
+        assert_eq!(bytes, [0x01, 0x23, 0x45, 0x67, 0x89, 0xab]);
+
+        let mut bytes = data.clone();
+        assert_eq!(bytes.write_at(0, &u16::to_be(0x89ab)), Ok(()));
+        assert_eq!(bytes, [0x89, 0xab, 0x45, 0x67]);
+
+        let mut bytes = data.clone();
+        assert_eq!(bytes.write_at(2, &u16::to_be(0x89ab)), Ok(()));
+        assert_eq!(bytes, [0x01, 0x23, 0x89, 0xab]);
+
+        assert_eq!(bytes.write_at(3, &u16::to_be(0x89ab)), Err(()));
+        assert_eq!(bytes.write_at(4, &u16::to_be(0x89ab)), Err(()));
+        assert_eq!(vec![].write_at(0, &u32::to_be(0x89ab)), Err(()));
+    }
+}
diff --git a/third_party/rust/object/src/xcoff.rs b/third_party/rust/object/src/xcoff.rs
new file mode 100644
index 0000000000..4724f8ef8b
--- /dev/null
+++ b/third_party/rust/object/src/xcoff.rs
@@ -0,0 +1,893 @@
+//! XCOFF definitions
+//!
+//! These definitions are independent of read/write support, although we do implement
+//! some traits useful for those.
+//!
+//! This module is the equivalent of /usr/include/xcoff.h, and is based heavily on it.
+
+#![allow(missing_docs)]
+
+use crate::endian::{BigEndian as BE, I16, U16, U32, U64};
+use crate::pod::Pod;
+
+/// The header at the start of every 32-bit XCOFF file.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct FileHeader32 {
+    /// Magic number. Must be 0x01DF.
+    pub f_magic: U16<BE>,
+    /// Number of sections.
+    pub f_nscns: U16<BE>,
+    /// Time and date of file creation.
+    pub f_timdat: U32<BE>,
+    /// Byte offset to symbol table start.
+    pub f_symptr: U32<BE>,
+    /// Number of entries in symbol table.
+    pub f_nsyms: U32<BE>,
+    /// Number of bytes in optional header
+    pub f_opthdr: U16<BE>,
+    /// Extra flags.
+    pub f_flags: U16<BE>,
+}
+
+/// The header at the start of every 64-bit XCOFF file.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct FileHeader64 {
+    /// Magic number. Must be 0x01F7.
+    pub f_magic: U16<BE>,
+    /// Number of sections.
+    pub f_nscns: U16<BE>,
+    /// Time and date of file creation
+    pub f_timdat: U32<BE>,
+    /// Byte offset to symbol table start.
+    pub f_symptr: U64<BE>,
+    /// Number of bytes in optional header
+    pub f_opthdr: U16<BE>,
+    /// Extra flags.
+    pub f_flags: U16<BE>,
+    /// Number of entries in symbol table.
+    pub f_nsyms: U32<BE>,
+}
+
+// Values for `f_magic`.
+//
+/// the 64-bit mach magic number
+pub const MAGIC_64: u16 = 0x01F7;
+/// the 32-bit mach magic number
+pub const MAGIC_32: u16 = 0x01DF;
+
+// Values for `f_flags`.
+//
+/// Indicates that the relocation information for binding has been removed from
+/// the file.
+pub const F_RELFLG: u16 = 0x0001;
+/// Indicates that the file is executable. No unresolved external references exist.
+pub const F_EXEC: u16 = 0x0002;
+/// Indicates that line numbers have been stripped from the file by a utility program.
+pub const F_LNNO: u16 = 0x0004;
+/// Indicates that the file was profiled with the fdpr command.
+pub const F_FDPR_PROF: u16 = 0x0010;
+/// Indicates that the file was reordered with the fdpr command.
+pub const F_FDPR_OPTI: u16 = 0x0020;
+/// Indicates that the file uses Very Large Program Support.
+pub const F_DSA: u16 = 0x0040;
+/// Indicates that one of the members of the auxiliary header specifying the
+/// medium page sizes is non-zero.
+pub const F_VARPG: u16 = 0x0100;
+/// Indicates the file is dynamically loadable and executable. External references
+/// are resolved by way of imports, and the file might contain exports and loader
+/// relocation.
+pub const F_DYNLOAD: u16 = 0x1000;
+/// Indicates the file is a shared object (shared library). The file is separately
+/// loadable. That is, it is not normally bound with other objects, and its loader
+/// exports symbols are used as automatic import symbols for other object files.
+pub const F_SHROBJ: u16 = 0x2000;
+/// If the object file is a member of an archive, it can be loaded by the system
+/// loader, but the member is ignored by the binder. If the object file is not in
+/// an archive, this flag has no effect.
+pub const F_LOADONLY: u16 = 0x4000;
+
+/// The auxiliary header immediately following file header. If the value of the
+/// f_opthdr field in the file header is 0, the auxiliary header does not exist.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct AuxHeader32 {
+    /// Flags.
+    pub o_mflag: U16<BE>,
+    /// Version.
+    pub o_vstamp: U16<BE>,
+    /// Text size in bytes.
+    pub o_tsize: U32<BE>,
+    /// Initialized data size in bytes.
+    pub o_dsize: U32<BE>,
+    /// Uninitialized data size in bytes.
+    pub o_bsize: U32<BE>,
+    /// Entry point descriptor (virtual address).
+    pub o_entry: U32<BE>,
+    /// Base address of text (virtual address).
+    pub o_text_start: U32<BE>,
+    /// Base address of data (virtual address).
+    pub o_data_start: U32<BE>,
+    /// Address of TOC anchor.
+    pub o_toc: U32<BE>,
+    /// Section number for entry point.
+    pub o_snentry: U16<BE>,
+    /// Section number for .text.
+    pub o_sntext: U16<BE>,
+    /// Section number for .data.
+    pub o_sndata: U16<BE>,
+    /// Section number for TOC.
+    pub o_sntoc: U16<BE>,
+    /// Section number for loader data.
+    pub o_snloader: U16<BE>,
+    /// Section number for .bss.
+    pub o_snbss: U16<BE>,
+    /// Maximum alignment for .text.
+    pub o_algntext: U16<BE>,
+    /// Maximum alignment for .data.
+    pub o_algndata: U16<BE>,
+    /// Module type field.
+    pub o_modtype: U16<BE>,
+    /// Bit flags - cpu types of objects.
+    pub o_cpuflag: u8,
+    /// Reserved for CPU type.
+    pub o_cputype: u8,
+    /// Maximum stack size allowed (bytes).
+    pub o_maxstack: U32<BE>,
+    /// Maximum data size allowed (bytes).
+    pub o_maxdata: U32<BE>,
+    /// Reserved for debuggers.
+    pub o_debugger: U32<BE>,
+    /// Requested text page size.
+    pub o_textpsize: u8,
+    /// Requested data page size.
+    pub o_datapsize: u8,
+    /// Requested stack page size.
+    pub o_stackpsize: u8,
+    /// Flags and thread-local storage alignment.
+    pub o_flags: u8,
+    /// Section number for .tdata.
+    pub o_sntdata: U16<BE>,
+    /// Section number for .tbss.
+    pub o_sntbss: U16<BE>,
+}
+
+/// The auxiliary header immediately following file header. If the value of the
+/// f_opthdr field in the file header is 0, the auxiliary header does not exist.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct AuxHeader64 {
+    /// Flags.
+    pub o_mflag: U16<BE>,
+    /// Version.
+    pub o_vstamp: U16<BE>,
+    /// Reserved for debuggers.
+    pub o_debugger: U32<BE>,
+    /// Base address of text (virtual address).
+    pub o_text_start: U64<BE>,
+    /// Base address of data (virtual address).
+    pub o_data_start: U64<BE>,
+    /// Address of TOC anchor.
+    pub o_toc: U64<BE>,
+    /// Section number for entry point.
+    pub o_snentry: U16<BE>,
+    /// Section number for .text.
+    pub o_sntext: U16<BE>,
+    /// Section number for .data.
+    pub o_sndata: U16<BE>,
+    /// Section number for TOC.
+    pub o_sntoc: U16<BE>,
+    /// Section number for loader data.
+    pub o_snloader: U16<BE>,
+    /// Section number for .bss.
+    pub o_snbss: U16<BE>,
+    /// Maximum alignment for .text.
+    pub o_algntext: U16<BE>,
+    /// Maximum alignment for .data.
+    pub o_algndata: U16<BE>,
+    /// Module type field.
+    pub o_modtype: U16<BE>,
+    /// Bit flags - cpu types of objects.
+    pub o_cpuflag: u8,
+    /// Reserved for CPU type.
+    pub o_cputype: u8,
+    /// Requested text page size.
+    pub o_textpsize: u8,
+    /// Requested data page size.
+    pub o_datapsize: u8,
+    /// Requested stack page size.
+    pub o_stackpsize: u8,
+    /// Flags and thread-local storage alignment.
+    pub o_flags: u8,
+    /// Text size in bytes.
+    pub o_tsize: U64<BE>,
+    /// Initialized data size in bytes.
+    pub o_dsize: U64<BE>,
+    /// Uninitialized data size in bytes.
+    pub o_bsize: U64<BE>,
+    /// Entry point descriptor (virtual address).
+    pub o_entry: U64<BE>,
+    /// Maximum stack size allowed (bytes).
+    pub o_maxstack: U64<BE>,
+    /// Maximum data size allowed (bytes).
+    pub o_maxdata: U64<BE>,
+    /// Section number for .tdata.
+    pub o_sntdata: U16<BE>,
+    /// Section number for .tbss.
+    pub o_sntbss: U16<BE>,
+    /// XCOFF64 flags.
+    pub o_x64flags: U16<BE>,
+    /// Reserved.
+    pub o_resv3a: U16<BE>,
+    /// Reserved.
+    pub o_resv3: [U32<BE>; 2],
+}
+
+/// Some AIX programs generate auxiliary headers for 32-bit object files that
+/// end after the data_start field.
+pub const AOUTHSZ_SHORT: u16 = 28;
+
+/// Section header.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct SectionHeader32 {
+    /// Section name.
+    pub s_name: [u8; 8],
+    /// Physical address.
+    pub s_paddr: U32<BE>,
+    /// Virtual address (same as physical address).
+    pub s_vaddr: U32<BE>,
+    /// Section size.
+    pub s_size: U32<BE>,
+    /// Offset in file to raw data for section.
+    pub s_scnptr: U32<BE>,
+    /// Offset in file to relocation entries for section.
+    pub s_relptr: U32<BE>,
+    /// Offset in file to line number entries for section.
+    pub s_lnnoptr: U32<BE>,
+    /// Number of relocation entries.
+    pub s_nreloc: U16<BE>,
+    /// Number of line number entries.
+    pub s_nlnno: U16<BE>,
+    /// Flags to define the section type.
+    pub s_flags: U32<BE>,
+}
+
+/// Section header.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct SectionHeader64 {
+    /// Section name.
+    pub s_name: [u8; 8],
+    /// Physical address.
+    pub s_paddr: U64<BE>,
+    /// Virtual address (same as physical address).
+    pub s_vaddr: U64<BE>,
+    /// Section size.
+    pub s_size: U64<BE>,
+    /// Offset in file to raw data for section.
+    pub s_scnptr: U64<BE>,
+    /// Offset in file to relocation entries for section.
+    pub s_relptr: U64<BE>,
+    /// Offset in file to line number entries for section.
+    pub s_lnnoptr: U64<BE>,
+    /// Number of relocation entries.
+    pub s_nreloc: U32<BE>,
+    /// Number of line number entries.
+    pub s_nlnno: U32<BE>,
+    /// Flags to define the section type.
+    pub s_flags: U32<BE>,
+    /// Reserved.
+    pub s_reserve: U32<BE>,
+}
+
+// Values for `s_flags`.
+//
+/// "regular" section
+pub const STYP_REG: u16 = 0x00;
+/// Specifies a pad section. A section of this type is used to provide alignment
+/// padding between sections within an XCOFF executable object file. This section
+/// header type is obsolete since padding is allowed in an XCOFF file without a
+/// corresponding pad section header.
+pub const STYP_PAD: u16 = 0x08;
+/// Specifies a DWARF debugging section, which provide source file and symbol
+/// information for the symbolic debugger.
+pub const STYP_DWARF: u16 = 0x10;
+/// Specifies an executable text (code) section. A section of this type contains
+/// the executable instructions of a program.
+pub const STYP_TEXT: u16 = 0x20;
+/// Specifies an initialized data section. A section of this type contains the
+/// initialized data and the TOC of a program.
+pub const STYP_DATA: u16 = 0x40;
+/// Specifies an uninitialized data section. A section header of this type
+/// defines the uninitialized data of a program.
+pub const STYP_BSS: u16 = 0x80;
+/// Specifies an exception section. A section of this type provides information
+/// to identify the reason that a trap or exception occurred within an executable
+/// object program.
+pub const STYP_EXCEPT: u16 = 0x0100;
+/// Specifies a comment section. A section of this type provides comments or data
+/// to special processing utility programs.
+pub const STYP_INFO: u16 = 0x0200;
+/// Specifies an initialized thread-local data section.
+pub const STYP_TDATA: u16 = 0x0400;
+/// Specifies an uninitialized thread-local data section.
+pub const STYP_TBSS: u16 = 0x0800;
+/// Specifies a loader section. A section of this type contains object file
+/// information for the system loader to load an XCOFF executable. The information
+/// includes imported symbols, exported symbols, relocation data, type-check
+/// information, and shared object names.
+pub const STYP_LOADER: u16 = 0x1000;
+/// Specifies a debug section. A section of this type contains stabstring
+/// information used by the symbolic debugger.
+pub const STYP_DEBUG: u16 = 0x2000;
+/// Specifies a type-check section. A section of this type contains
+/// parameter/argument type-check strings used by the binder.
+pub const STYP_TYPCHK: u16 = 0x4000;
+/// Specifies a relocation or line-number field overflow section. A section
+/// header of this type contains the count of relocation entries and line
+/// number entries for some other section. This section header is required
+/// when either of the counts exceeds 65,534.
+pub const STYP_OVRFLO: u16 = 0x8000;
+
+pub const SIZEOF_SYMBOL: usize = 18;
+
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct SymbolBytes(pub [u8; SIZEOF_SYMBOL]);
+
+/// Symbol table entry.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct Symbol32 {
+    /// Symbol name.
+    ///
+    /// If first 4 bytes are 0, then second 4 bytes are offset into string table.
+    pub n_name: [u8; 8],
+    /// Symbol value; storage class-dependent.
+    pub n_value: U32<BE>,
+    /// Section number of symbol.
+    pub n_scnum: I16<BE>,
+    /// Basic and derived type specification.
+    pub n_type: U16<BE>,
+    /// Storage class of symbol.
+    pub n_sclass: u8,
+    /// Number of auxiliary entries.
+    pub n_numaux: u8,
+}
+
+/// Symbol table entry.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct Symbol64 {
+    /// Symbol value; storage class-dependent.
+    pub n_value: U64<BE>,
+    /// Offset of the name in string table or .debug section.
+    pub n_offset: U32<BE>,
+    /// Section number of symbol.
+    pub n_scnum: I16<BE>,
+    /// Basic and derived type specification.
+    pub n_type: U16<BE>,
+    /// Storage class of symbol.
+    pub n_sclass: u8,
+    /// Number of auxiliary entries.
+    pub n_numaux: u8,
+}
+
+// Values for `n_scnum`.
+//
+/// A special symbolic debugging symbol.
+pub const N_DEBUG: i16 = -2;
+/// An absolute symbol. The symbol has a value but is not relocatable.
+pub const N_ABS: i16 = -1;
+/// An undefined external symbol.
+pub const N_UNDEF: i16 = 0;
+
+// Vlaues for `n_type`.
+//
+/// Values for visibility as they would appear when encoded in the high 4 bits
+/// of the 16-bit unsigned n_type field of symbol table entries. Valid for
+/// 32-bit XCOFF only when the o_vstamp in the auxiliary header is greater than 1.
+pub const SYM_V_MASK: u16 = 0xF000;
+pub const SYM_V_INTERNAL: u16 = 0x1000;
+pub const SYM_V_HIDDEN: u16 = 0x2000;
+pub const SYM_V_PROTECTED: u16 = 0x3000;
+pub const SYM_V_EXPORTED: u16 = 0x4000;
+
+// Values for `n_sclass`.
+//
+// Storage classes used for symbolic debugging symbols.
+//
+/// Source file name and compiler information.
+pub const C_FILE: u8 = 103;
+/// Beginning of include file.
+pub const C_BINCL: u8 = 108;
+/// Ending of include file.
+pub const C_EINCL: u8 = 109;
+/// Global variable.
+pub const C_GSYM: u8 = 128;
+/// Statically allocated symbol.
+pub const C_STSYM: u8 = 133;
+/// Beginning of common block.
+pub const C_BCOMM: u8 = 135;
+/// End of common block.
+pub const C_ECOMM: u8 = 137;
+/// Alternate entry.
+pub const C_ENTRY: u8 = 141;
+/// Beginning of static block.
+pub const C_BSTAT: u8 = 143;
+/// End of static block.
+pub const C_ESTAT: u8 = 144;
+/// Global thread-local variable.
+pub const C_GTLS: u8 = 145;
+/// Static thread-local variable.
+pub const C_STTLS: u8 = 146;
+/// DWARF section symbol.
+pub const C_DWARF: u8 = 112;
+//
+// Storage classes used for absolute symbols.
+//
+/// Automatic variable allocated on stack.
+pub const C_LSYM: u8 = 129;
+/// Argument to subroutine allocated on stack.
+pub const C_PSYM: u8 = 130;
+/// Register variable.
+pub const C_RSYM: u8 = 131;
+/// Argument to function or procedure stored in register.
+pub const C_RPSYM: u8 = 132;
+/// Local member of common block.
+pub const C_ECOML: u8 = 136;
+/// Function or procedure.
+pub const C_FUN: u8 = 142;
+//
+// Storage classes used for undefined external symbols or symbols of general sections.
+//
+/// External symbol.
+pub const C_EXT: u8 = 2;
+/// Weak external symbol.
+pub const C_WEAKEXT: u8 = 111;
+//
+// Storage classes used for symbols of general sections.
+//
+/// Symbol table entry marked for deletion.
+pub const C_NULL: u8 = 0;
+/// Static.
+pub const C_STAT: u8 = 3;
+/// Beginning or end of inner block.
+pub const C_BLOCK: u8 = 100;
+/// Beginning or end of function.
+pub const C_FCN: u8 = 101;
+/// Un-named external symbol.
+pub const C_HIDEXT: u8 = 107;
+/// Comment string in .info section.
+pub const C_INFO: u8 = 110;
+/// Declaration of object (type).
+pub const C_DECL: u8 = 140;
+//
+// Storage classes - Obsolete/Undocumented.
+//
+/// Automatic variable.
+pub const C_AUTO: u8 = 1;
+/// Register variable.
+pub const C_REG: u8 = 4;
+/// External definition.
+pub const C_EXTDEF: u8 = 5;
+/// Label.
+pub const C_LABEL: u8 = 6;
+/// Undefined label.
+pub const C_ULABEL: u8 = 7;
+/// Member of structure.
+pub const C_MOS: u8 = 8;
+/// Function argument.
+pub const C_ARG: u8 = 9;
+/// Structure tag.
+pub const C_STRTAG: u8 = 10;
+/// Member of union.
+pub const C_MOU: u8 = 11;
+/// Union tag.
+pub const C_UNTAG: u8 = 12;
+/// Type definition.
+pub const C_TPDEF: u8 = 13;
+/// Undefined static.
+pub const C_USTATIC: u8 = 14;
+/// Enumeration tag.
+pub const C_ENTAG: u8 = 15;
+/// Member of enumeration.
+pub const C_MOE: u8 = 16;
+/// Register parameter.
+pub const C_REGPARM: u8 = 17;
+/// Bit field.
+pub const C_FIELD: u8 = 18;
+/// End of structure.
+pub const C_EOS: u8 = 102;
+/// Duplicate tag.
+pub const C_ALIAS: u8 = 105;
+/// Special storage class for external.
+pub const C_HIDDEN: u8 = 106;
+/// Physical end of function.
+pub const C_EFCN: u8 = 255;
+/// Reserved.
+pub const C_TCSYM: u8 = 134;
+
+/// File Auxiliary Entry for C_FILE Symbols.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct FileAux32 {
+    /// The source file name or compiler-related string.
+    ///
+    /// If first 4 bytes are 0, then second 4 bytes are offset into string table.
+    pub x_fname: [u8; 8],
+    /// Pad size for file name.
+    pub x_fpad: [u8; 6],
+    /// The source-file string type.
+    pub x_ftype: u8,
+    /// Reserved.
+    pub x_freserve: [u8; 3],
+}
+
+/// File Auxiliary Entry for C_FILE Symbols.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct FileAux64 {
+    /// The source file name or compiler-related string.
+    ///
+    /// If first 4 bytes are 0, then second 4 bytes are offset into string table.
+    pub x_fname: [u8; 8],
+    /// Pad size for file name.
+    pub x_fpad: [u8; 6],
+    /// The source-file string type.
+    pub x_ftype: u8,
+    /// Reserved.
+    pub x_freserve: [u8; 2],
+    /// Specifies the type of auxiliary entry. Contains _AUX_FILE for this auxiliary entry.
+    pub x_auxtype: u8,
+}
+
+// Values for `x_ftype`.
+//
+/// Specifies the source-file name.
+pub const XFT_FN: u8 = 0;
+/// Specifies the compiler time stamp.
+pub const XFT_CT: u8 = 1;
+/// Specifies the compiler version number.
+pub const XFT_CV: u8 = 2;
+/// Specifies compiler-defined information.
+pub const XFT_CD: u8 = 128;
+
+/// Csect auxiliary entry for C_EXT, C_WEAKEXT, and C_HIDEXT symbols.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct CsectAux32 {
+    /// Section length.
+    pub x_scnlen: U32<BE>,
+    /// Offset of parameter type-check hash in .typchk section.
+    pub x_parmhash: U32<BE>,
+    /// .typchk section number.
+    pub x_snhash: U16<BE>,
+    /// Symbol alignment and type.
+    pub x_smtyp: u8,
+    /// Storage mapping class.
+    pub x_smclas: u8,
+    /// Reserved.
+    pub x_stab: U32<BE>,
+    /// x_snstab.
+    pub x_snstab: U16<BE>,
+}
+
+/// Csect auxiliary entry for C_EXT, C_WEAKEXT, and C_HIDEXT symbols.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct CsectAux64 {
+    /// Low 4 bytes of section length.
+    pub x_scnlen_lo: U32<BE>,
+    /// Offset of parameter type-check hash in .typchk section.
+    pub x_parmhash: U32<BE>,
+    /// .typchk section number.
+    pub x_snhash: U16<BE>,
+    /// Symbol alignment and type.
+    pub x_smtyp: u8,
+    /// Storage mapping class.
+    pub x_smclas: u8,
+    /// High 4 bytes of section length.
+    pub x_scnlen_hi: U32<BE>,
+    /// Reserved.
+    pub pad: u8,
+    /// Contains _AUX_CSECT; indicates type of auxiliary entry.
+    pub x_auxtype: u8,
+}
+
+// Values for `x_smtyp`.
+//
+/// External reference.
+pub const XTY_ER: u8 = 0;
+/// Csect definition for initialized storage.
+pub const XTY_SD: u8 = 1;
+/// Defines an entry point to an initialized csect.
+pub const XTY_LD: u8 = 2;
+/// Common csect definition. For uninitialized storage.
+pub const XTY_CM: u8 = 3;
+
+// Values for `x_smclas`.
+//
+// READ ONLY CLASSES
+//
+/// Program Code
+pub const XMC_PR: u8 = 0;
+/// Read Only Constant
+pub const XMC_RO: u8 = 1;
+/// Debug Dictionary Table
+pub const XMC_DB: u8 = 2;
+/// Global Linkage (Interfile Interface Code)
+pub const XMC_GL: u8 = 6;
+/// Extended Operation (Pseudo Machine Instruction)
+pub const XMC_XO: u8 = 7;
+/// Supervisor Call (32-bit process only)
+pub const XMC_SV: u8 = 8;
+/// Supervisor Call for 64-bit process
+pub const XMC_SV64: u8 = 17;
+/// Supervisor Call for both 32- and 64-bit processes
+pub const XMC_SV3264: u8 = 18;
+/// Traceback Index csect
+pub const XMC_TI: u8 = 12;
+/// Traceback Table csect
+pub const XMC_TB: u8 = 13;
+//
+// READ WRITE CLASSES
+//
+/// Read Write Data
+pub const XMC_RW: u8 = 5;
+/// TOC Anchor for TOC Addressability
+pub const XMC_TC0: u8 = 15;
+/// General TOC item
+pub const XMC_TC: u8 = 3;
+/// Scalar data item in the TOC
+pub const XMC_TD: u8 = 16;
+/// Descriptor csect
+pub const XMC_DS: u8 = 10;
+/// Unclassified - Treated as Read Write
+pub const XMC_UA: u8 = 4;
+/// BSS class (uninitialized static internal)
+pub const XMC_BS: u8 = 9;
+/// Un-named Fortran Common
+pub const XMC_UC: u8 = 11;
+/// Initialized thread-local variable
+pub const XMC_TL: u8 = 20;
+/// Uninitialized thread-local variable
+pub const XMC_UL: u8 = 21;
+/// Symbol mapped at the end of TOC
+pub const XMC_TE: u8 = 22;
+
+/// Function auxiliary entry.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct FunAux32 {
+    /// File offset to exception table entry.
+    pub x_exptr: U32<BE>,
+    /// Size of function in bytes.
+    pub x_fsize: U32<BE>,
+    /// File pointer to line number
+    pub x_lnnoptr: U32<BE>,
+    /// Symbol table index of next entry beyond this function.
+    pub x_endndx: U32<BE>,
+    /// Pad
+    pub pad: U16<BE>,
+}
+
+/// Function auxiliary entry.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct FunAux64 {
+    /// File pointer to line number
+    pub x_lnnoptr: U64<BE>,
+    /// Size of function in bytes.
+    pub x_fsize: U32<BE>,
+    /// Symbol table index of next entry beyond this function.
+    pub x_endndx: U32<BE>,
+    /// Pad
+    pub pad: u8,
+    /// Contains _AUX_FCN; Type of auxiliary entry.
+    pub x_auxtype: u8,
+}
+
+/// Exception auxiliary entry. (XCOFF64 only)
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct ExpAux {
+    /// File offset to exception table entry.
+    pub x_exptr: U64<BE>,
+    /// Size of function in bytes.
+    pub x_fsize: U32<BE>,
+    /// Symbol table index of next entry beyond this function.
+    pub x_endndx: U32<BE>,
+    /// Pad
+    pub pad: u8,
+    /// Contains _AUX_EXCEPT; Type of auxiliary entry
+    pub x_auxtype: u8,
+}
+
+/// Block auxiliary entry for the C_BLOCK and C_FCN Symbols.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct BlockAux32 {
+    /// Reserved.
+    pub pad: [u8; 2],
+    /// High-order 2 bytes of the source line number.
+    pub x_lnnohi: U16<BE>,
+    /// Low-order 2 bytes of the source line number.
+    pub x_lnnolo: U16<BE>,
+    /// Reserved.
+    pub pad2: [u8; 12],
+}
+
+/// Block auxiliary entry for the C_BLOCK and C_FCN Symbols.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct BlockAux64 {
+    /// Source line number.
+    pub x_lnno: U32<BE>,
+    /// Reserved.
+    pub pad: [u8; 13],
+    /// Contains _AUX_SYM; Type of auxiliary entry.
+    pub x_auxtype: u8,
+}
+
+/// Section auxiliary entry for the C_STAT Symbol. (XCOFF32 Only)
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct StatAux {
+    /// Section length.
+    pub x_scnlen: U32<BE>,
+    /// Number of relocation entries.
+    pub x_nreloc: U16<BE>,
+    /// Number of line numbers.
+    pub x_nlinno: U16<BE>,
+    /// Reserved.
+    pub pad: [u8; 10],
+}
+
+/// Section auxiliary entry Format for C_DWARF symbols.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct DwarfAux32 {
+    /// Length of portion of section represented by symbol.
+    pub x_scnlen: U32<BE>,
+    /// Reserved.
+    pub pad: [u8; 4],
+    /// Number of relocation entries in section.
+    pub x_nreloc: U32<BE>,
+    /// Reserved.
+    pub pad2: [u8; 6],
+}
+
+/// Section auxiliary entry Format for C_DWARF symbols.
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct DwarfAux64 {
+    /// Length of portion of section represented by symbol.
+    pub x_scnlen: U64<BE>,
+    /// Number of relocation entries in section.
+    pub x_nreloc: U64<BE>,
+    /// Reserved.
+    pub pad: u8,
+    /// Contains _AUX_SECT; Type of Auxillary entry.
+    pub x_auxtype: u8,
+}
+
+// Values for `x_auxtype`
+//
+/// Identifies an exception auxiliary entry.
+pub const AUX_EXCEPT: u8 = 255;
+/// Identifies a function auxiliary entry.
+pub const AUX_FCN: u8 = 254;
+/// Identifies a symbol auxiliary entry.
+pub const AUX_SYM: u8 = 253;
+/// Identifies a file auxiliary entry.
+pub const AUX_FILE: u8 = 252;
+/// Identifies a csect auxiliary entry.
+pub const AUX_CSECT: u8 = 251;
+/// Identifies a SECT auxiliary entry.
+pub const AUX_SECT: u8 = 250;
+
+/// Relocation table entry
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct Rel32 {
+    /// Virtual address (position) in section to be relocated.
+    pub r_vaddr: U32<BE>,
+    /// Symbol table index of item that is referenced.
+    pub r_symndx: U32<BE>,
+    /// Relocation size and information.
+    pub r_rsize: u8,
+    /// Relocation type.
+    pub r_rtype: u8,
+}
+
+/// Relocation table entry
+#[derive(Debug, Clone, Copy)]
+#[repr(C)]
+pub struct Rel64 {
+    /// Virtual address (position) in section to be relocated.
+    pub r_vaddr: U64<BE>,
+    /// Symbol table index of item that is referenced.
+    pub r_symndx: U32<BE>,
+    /// Relocation size and information.
+    pub r_rsize: u8,
+    /// Relocation type.
+    pub r_rtype: u8,
+}
+
+// Values for `r_rtype`.
+//
+/// Positive relocation.
+pub const R_POS: u8 = 0x00;
+/// Positive indirect load relocation.
+pub const R_RL: u8 = 0x0c;
+/// Positive load address relocation. Modifiable instruction.
+pub const R_RLA: u8 = 0x0d;
+/// Negative relocation.
+pub const R_NEG: u8 = 0x01;
+/// Relative to self relocation.
+pub const R_REL: u8 = 0x02;
+/// Relative to the TOC relocation.
+pub const R_TOC: u8 = 0x03;
+/// TOC relative indirect load relocation.
+pub const R_TRL: u8 = 0x12;
+/// Relative to the TOC or to the thread-local storage base relocation.
+pub const R_TRLA: u8 = 0x13;
+/// Global linkage-external TOC address relocation.
+pub const R_GL: u8 = 0x05;
+/// Local object TOC address relocation.
+pub const R_TCL: u8 = 0x06;
+/// A non-relocating relocation.
+pub const R_REF: u8 = 0x0f;
+/// Branch absolute relocation. References a non-modifiable instruction.
+pub const R_BA: u8 = 0x08;
+/// Branch relative to self relocation. References a non-modifiable instruction.
+pub const R_BR: u8 = 0x0a;
+/// Branch absolute relocation. References a modifiable instruction.
+pub const R_RBA: u8 = 0x18;
+/// Branch relative to self relocation. References a modifiable instruction.
+pub const R_RBR: u8 = 0x1a;
+/// General-dynamic reference to TLS symbol.
+pub const R_TLS: u8 = 0x20;
+/// Initial-exec reference to TLS symbol.
+pub const R_TLS_IE: u8 = 0x21;
+/// Local-dynamic reference to TLS symbol.
+pub const R_TLS_LD: u8 = 0x22;
+/// Local-exec reference to TLS symbol.
+pub const R_TLS_LE: u8 = 0x23;
+/// Module reference to TLS.
+pub const R_TLSM: u8 = 0x24;
+/// Module reference to the local TLS storage.
+pub const R_TLSML: u8 = 0x25;
+/// Relative to TOC upper.
+pub const R_TOCU: u8 = 0x30;
+/// Relative to TOC lower.
+pub const R_TOCL: u8 = 0x31;
+
+unsafe_impl_pod!(
+    FileHeader32,
+    FileHeader64,
+    AuxHeader32,
+    AuxHeader64,
+    SectionHeader32,
+    SectionHeader64,
+    SymbolBytes,
+    Symbol32,
+    Symbol64,
+    FileAux32,
+    FileAux64,
+    CsectAux32,
+    CsectAux64,
+    FunAux32,
+    FunAux64,
+    ExpAux,
+    BlockAux32,
+    BlockAux64,
+    StatAux,
+    DwarfAux32,
+    DwarfAux64,
+    Rel32,
+    Rel64,
+);