diff options
Diffstat (limited to 'vendor/object/src/read/xcoff')
| -rw-r--r-- | vendor/object/src/read/xcoff/comdat.rs | 130 | ||||
| -rw-r--r-- | vendor/object/src/read/xcoff/file.rs | 629 | ||||
| -rw-r--r-- | vendor/object/src/read/xcoff/mod.rs | 21 | ||||
| -rw-r--r-- | vendor/object/src/read/xcoff/relocation.rs | 128 | ||||
| -rw-r--r-- | vendor/object/src/read/xcoff/section.rs | 426 | ||||
| -rw-r--r-- | vendor/object/src/read/xcoff/segment.rs | 115 | ||||
| -rw-r--r-- | vendor/object/src/read/xcoff/symbol.rs | 634 |
7 files changed, 2083 insertions, 0 deletions
diff --git a/vendor/object/src/read/xcoff/comdat.rs b/vendor/object/src/read/xcoff/comdat.rs new file mode 100644 index 000000000..eeed2f54d --- /dev/null +++ b/vendor/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/vendor/object/src/read/xcoff/file.rs b/vendor/object/src/read/xcoff/file.rs new file mode 100644 index 000000000..bac9e7075 --- /dev/null +++ b/vendor/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/vendor/object/src/read/xcoff/mod.rs b/vendor/object/src/read/xcoff/mod.rs new file mode 100644 index 000000000..136e31073 --- /dev/null +++ b/vendor/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/vendor/object/src/read/xcoff/relocation.rs b/vendor/object/src/read/xcoff/relocation.rs new file mode 100644 index 000000000..8107a2e82 --- /dev/null +++ b/vendor/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/vendor/object/src/read/xcoff/section.rs b/vendor/object/src/read/xcoff/section.rs new file mode 100644 index 000000000..0944e10c8 --- /dev/null +++ b/vendor/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) => §name[..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/vendor/object/src/read/xcoff/segment.rs b/vendor/object/src/read/xcoff/segment.rs new file mode 100644 index 000000000..49969438d --- /dev/null +++ b/vendor/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/vendor/object/src/read/xcoff/symbol.rs b/vendor/object/src/read/xcoff/symbol.rs new file mode 100644 index 000000000..6738ad171 --- /dev/null +++ b/vendor/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 + } +} |