From 1b6a04ca5504955c571d1c97504fb45ea0befee4 Mon Sep 17 00:00:00 2001
From: Valentin Popov <valentin@popov.link>
Date: Mon, 8 Jan 2024 01:21:28 +0400
Subject: Initial vendor packages
Signed-off-by: Valentin Popov <valentin@popov.link>
---
vendor/object/src/read/elf/relocation.rs | 628 +++++++++++++++++++++++++++++++
1 file changed, 628 insertions(+)
create mode 100644 vendor/object/src/read/elf/relocation.rs
(limited to 'vendor/object/src/read/elf/relocation.rs')
diff --git a/vendor/object/src/read/elf/relocation.rs b/vendor/object/src/read/elf/relocation.rs
new file mode 100644
index 0000000..aac1574
--- /dev/null
+++ b/vendor/object/src/read/elf/relocation.rs
@@ -0,0 +1,628 @@
+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 for the dynamic relocations in an [`ElfFile32`](super::ElfFile32).
+pub type ElfDynamicRelocationIterator32<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+ ElfDynamicRelocationIterator<'data, 'file, elf::FileHeader32<Endian>, R>;
+/// An iterator for the dynamic relocations in an [`ElfFile64`](super::ElfFile64).
+pub type ElfDynamicRelocationIterator64<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+ ElfDynamicRelocationIterator<'data, 'file, elf::FileHeader64<Endian>, R>;
+
+/// An iterator for the dynamic relocations in 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 for the relocations for an [`ElfSection32`](super::ElfSection32).
+pub type ElfSectionRelocationIterator32<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+ ElfSectionRelocationIterator<'data, 'file, elf::FileHeader32<Endian>, R>;
+/// An iterator for the relocations for an [`ElfSection64`](super::ElfSection64).
+pub type ElfSectionRelocationIterator64<'data, 'file, Endian = Endianness, R = &'data [u8]> =
+ ElfSectionRelocationIterator<'data, 'file, elf::FileHeader64<Endian>, R>;
+
+/// An iterator for the relocations for an [`ElfSection`](super::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_CSKY => match reloc.r_type(endian, false) {
+ elf::R_CKCORE_ADDR32 => (RelocationKind::Absolute, 32),
+ elf::R_CKCORE_PCREL32 => (RelocationKind::Relative, 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_64_PCREL => (RelocationKind::Relative, 64),
+ 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_SHARC => match reloc.r_type(endian, false) {
+ elf::R_SHARC_ADDR24_V3 => {
+ encoding = RelocationEncoding::SharcTypeA;
+ (RelocationKind::Absolute, 24)
+ }
+ elf::R_SHARC_ADDR32_V3 => {
+ encoding = RelocationEncoding::SharcTypeA;
+ (RelocationKind::Absolute, 32)
+ }
+ elf::R_SHARC_ADDR_VAR_V3 => {
+ encoding = RelocationEncoding::Generic;
+ (RelocationKind::Absolute, 32)
+ }
+ elf::R_SHARC_PCRSHORT_V3 => {
+ encoding = RelocationEncoding::SharcTypeA;
+ (RelocationKind::Relative, 6)
+ }
+ elf::R_SHARC_PCRLONG_V3 => {
+ encoding = RelocationEncoding::SharcTypeA;
+ (RelocationKind::Relative, 24)
+ }
+ elf::R_SHARC_DATA6_V3 => {
+ encoding = RelocationEncoding::SharcTypeA;
+ (RelocationKind::Absolute, 6)
+ }
+ elf::R_SHARC_DATA16_V3 => {
+ encoding = RelocationEncoding::SharcTypeA;
+ (RelocationKind::Absolute, 16)
+ }
+ elf::R_SHARC_DATA6_VISA_V3 => {
+ encoding = RelocationEncoding::SharcTypeB;
+ (RelocationKind::Absolute, 6)
+ }
+ elf::R_SHARC_DATA7_VISA_V3 => {
+ encoding = RelocationEncoding::SharcTypeB;
+ (RelocationKind::Absolute, 7)
+ }
+ elf::R_SHARC_DATA16_VISA_V3 => {
+ encoding = RelocationEncoding::SharcTypeB;
+ (RelocationKind::Absolute, 16)
+ }
+ elf::R_SHARC_PCR6_VISA_V3 => {
+ encoding = RelocationEncoding::SharcTypeB;
+ (RelocationKind::Relative, 16)
+ }
+ elf::R_SHARC_ADDR_VAR16_V3 => {
+ encoding = RelocationEncoding::Generic;
+ (RelocationKind::Absolute, 16)
+ }
+ 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 [`elf::Rel32`] and [`elf::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 [`elf::Rela32`] and [`elf::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)
+ }
+}
--
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