diff options
Diffstat (limited to 'vendor/object/src/read/macho/relocation.rs')
| -rw-r--r-- | vendor/object/src/read/macho/relocation.rs | 158 |
1 files changed, 0 insertions, 158 deletions
diff --git a/vendor/object/src/read/macho/relocation.rs b/vendor/object/src/read/macho/relocation.rs deleted file mode 100644 index 709f1a4..0000000 --- a/vendor/object/src/read/macho/relocation.rs +++ /dev/null @@ -1,158 +0,0 @@ -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 for the relocations in a [`MachOSection32`](super::MachOSection32). -pub type MachORelocationIterator32<'data, 'file, Endian = Endianness, R = &'data [u8]> = - MachORelocationIterator<'data, 'file, macho::MachHeader32<Endian>, R>; -/// An iterator for the relocations in a [`MachOSection64`](super::MachOSection64). -pub type MachORelocationIterator64<'data, 'file, Endian = Endianness, R = &'data [u8]> = - MachORelocationIterator<'data, 'file, macho::MachHeader64<Endian>, R>; - -/// An iterator for the relocations in a [`MachOSection`](super::MachOSection). -pub struct MachORelocationIterator<'data, 'file, Mach, R = &'data [u8]> -where - 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> { - let mut paired_addend = 0; - 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 | macho::CPU_TYPE_ARM64_32 => { - match (reloc.r_type, reloc.r_pcrel) { - (macho::ARM64_RELOC_UNSIGNED, false) => RelocationKind::Absolute, - (macho::ARM64_RELOC_ADDEND, _) => { - paired_addend = i64::from(reloc.r_symbolnum) - .wrapping_shl(64 - 24) - .wrapping_shr(64 - 24); - continue; - } - _ => 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 implicit_addend = paired_addend == 0; - let mut addend = paired_addend; - if reloc.r_pcrel { - // For PC relative relocations on some architectures, the - // addend does not include the offset required due to the - // PC being different from the place of the relocation. - // This differs from other file formats, so adjust the - // addend here to account for this. - match cputype { - macho::CPU_TYPE_X86 => { - addend -= 1 << reloc.r_length; - } - macho::CPU_TYPE_X86_64 => { - addend -= 1 << reloc.r_length; - match reloc.r_type { - macho::X86_64_RELOC_SIGNED_1 => addend -= 1, - macho::X86_64_RELOC_SIGNED_2 => addend -= 2, - macho::X86_64_RELOC_SIGNED_4 => addend -= 4, - _ => {} - } - } - // TODO: maybe missing support for some architectures and relocations - _ => {} - } - } - return Some(( - reloc.r_address as u64, - Relocation { - kind, - encoding, - size, - target, - addend, - implicit_addend, - }, - )); - } - } -} - -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() - } -} |