diff options
Diffstat (limited to 'vendor/object-0.29.0/src/read/macho/file.rs')
| -rw-r--r-- | vendor/object-0.29.0/src/read/macho/file.rs | 729 |
1 files changed, 0 insertions, 729 deletions
diff --git a/vendor/object-0.29.0/src/read/macho/file.rs b/vendor/object-0.29.0/src/read/macho/file.rs deleted file mode 100644 index e028de3b9..000000000 --- a/vendor/object-0.29.0/src/read/macho/file.rs +++ /dev/null @@ -1,729 +0,0 @@ -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, - _ => 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(§ion_name[1..15]) - } else { - Some(§ion_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) - } -} |