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-rw-r--r--vendor/object-0.26.2/src/read/macho/relocation.rs126
1 files changed, 126 insertions, 0 deletions
diff --git a/vendor/object-0.26.2/src/read/macho/relocation.rs b/vendor/object-0.26.2/src/read/macho/relocation.rs
new file mode 100644
index 000000000..5dd7df896
--- /dev/null
+++ b/vendor/object-0.26.2/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()
+ }
+}