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elf: reformat parse_relocation
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@numas13
numas13 committed Sep 9, 2024
1 parent 8469876 commit 757ded9
Showing 1 changed file with 123 additions and 184 deletions.
307 changes: 123 additions & 184 deletions src/read/elf/relocation.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -247,238 +247,177 @@ fn parse_relocation<Elf: FileHeader>(
reloc: Elf::Rela,
implicit_addend: bool,
) -> Relocation {
let mut encoding = RelocationEncoding::Generic;
use RelocationEncoding as E;
use RelocationKind as K;

let is_mips64el = header.is_mips64el(endian);
let r_type = reloc.r_type(endian, is_mips64el);
let flags = RelocationFlags::Elf { r_type };
let (kind, size) = match header.e_machine(endian) {

// helper wrappers
let r = |kind, size| (kind, size, E::Generic);
let e = |kind, size, encoding| (kind, size, encoding);

let unknown = r(K::Unknown, 0);
let (kind, size, encoding) = match header.e_machine(endian) {
elf::EM_AARCH64 => {
if header.is_type_64() {
match r_type {
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)
}
_ => (RelocationKind::Unknown, 0),
elf::R_AARCH64_ABS64 => r(K::Absolute, 64),
elf::R_AARCH64_ABS32 => r(K::Absolute, 32),
elf::R_AARCH64_ABS16 => r(K::Absolute, 16),
elf::R_AARCH64_PREL64 => r(K::Relative, 64),
elf::R_AARCH64_PREL32 => r(K::Relative, 32),
elf::R_AARCH64_PREL16 => r(K::Relative, 16),
elf::R_AARCH64_CALL26 => e(K::PltRelative, 26, E::AArch64Call),
_ => unknown,
}
} else {
match r_type {
elf::R_AARCH64_P32_ABS32 => (RelocationKind::Absolute, 32),
_ => (RelocationKind::Unknown, 0),
elf::R_AARCH64_P32_ABS32 => r(K::Absolute, 32),
_ => unknown,
}
}
}
elf::EM_ARM => match r_type {
elf::R_ARM_ABS32 => (RelocationKind::Absolute, 32),
_ => (RelocationKind::Unknown, 0),
elf::R_ARM_ABS32 => r(K::Absolute, 32),
_ => unknown,
},
elf::EM_AVR => match r_type {
elf::R_AVR_32 => (RelocationKind::Absolute, 32),
elf::R_AVR_16 => (RelocationKind::Absolute, 16),
_ => (RelocationKind::Unknown, 0),
elf::R_AVR_32 => r(K::Absolute, 32),
elf::R_AVR_16 => r(K::Absolute, 16),
_ => unknown,
},
elf::EM_BPF => match r_type {
elf::R_BPF_64_64 => (RelocationKind::Absolute, 64),
elf::R_BPF_64_32 => (RelocationKind::Absolute, 32),
_ => (RelocationKind::Unknown, 0),
elf::R_BPF_64_64 => r(K::Absolute, 64),
elf::R_BPF_64_32 => r(K::Absolute, 32),
_ => unknown,
},
elf::EM_CSKY => match r_type {
elf::R_CKCORE_ADDR32 => (RelocationKind::Absolute, 32),
elf::R_CKCORE_PCREL32 => (RelocationKind::Relative, 32),
_ => (RelocationKind::Unknown, 0),
elf::R_CKCORE_ADDR32 => r(K::Absolute, 32),
elf::R_CKCORE_PCREL32 => r(K::Relative, 32),
_ => unknown,
},
elf::EM_386 => match r_type {
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),
_ => (RelocationKind::Unknown, 0),
elf::R_386_32 => r(K::Absolute, 32),
elf::R_386_PC32 => r(K::Relative, 32),
elf::R_386_GOT32 => r(K::Got, 32),
elf::R_386_PLT32 => r(K::PltRelative, 32),
elf::R_386_GOTOFF => r(K::GotBaseOffset, 32),
elf::R_386_GOTPC => r(K::GotBaseRelative, 32),
elf::R_386_16 => r(K::Absolute, 16),
elf::R_386_PC16 => r(K::Relative, 16),
elf::R_386_8 => r(K::Absolute, 8),
elf::R_386_PC8 => r(K::Relative, 8),
_ => unknown,
},
elf::EM_X86_64 => match r_type {
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),
_ => (RelocationKind::Unknown, 0),
elf::R_X86_64_64 => r(K::Absolute, 64),
elf::R_X86_64_PC32 => r(K::Relative, 32),
elf::R_X86_64_GOT32 => r(K::Got, 32),
elf::R_X86_64_PLT32 => r(K::PltRelative, 32),
elf::R_X86_64_GOTPCREL => r(K::GotRelative, 32),
elf::R_X86_64_32 => r(K::Absolute, 32),
elf::R_X86_64_32S => e(K::Absolute, 32, E::X86Signed),
elf::R_X86_64_16 => r(K::Absolute, 16),
elf::R_X86_64_PC16 => r(K::Relative, 16),
elf::R_X86_64_8 => r(K::Absolute, 8),
elf::R_X86_64_PC8 => r(K::Relative, 8),
_ => unknown,
},
elf::EM_HEXAGON => match r_type {
elf::R_HEX_32 => (RelocationKind::Absolute, 32),
_ => (RelocationKind::Unknown, 0),
elf::R_HEX_32 => r(K::Absolute, 32),
_ => unknown,
},
elf::EM_LOONGARCH => match r_type {
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)
}
_ => (RelocationKind::Unknown, 0),
elf::R_LARCH_32 => r(K::Absolute, 32),
elf::R_LARCH_64 => r(K::Absolute, 64),
elf::R_LARCH_32_PCREL => r(K::Relative, 32),
elf::R_LARCH_64_PCREL => r(K::Relative, 64),
elf::R_LARCH_B16 => e(K::Relative, 16, E::LoongArchBranch),
elf::R_LARCH_B21 => e(K::Relative, 21, E::LoongArchBranch),
elf::R_LARCH_B26 => e(K::Relative, 26, E::LoongArchBranch),
_ => unknown,
},
elf::EM_MIPS => match r_type {
elf::R_MIPS_16 => (RelocationKind::Absolute, 16),
elf::R_MIPS_32 => (RelocationKind::Absolute, 32),
elf::R_MIPS_64 => (RelocationKind::Absolute, 64),
_ => (RelocationKind::Unknown, 0),
elf::R_MIPS_16 => r(K::Absolute, 16),
elf::R_MIPS_32 => r(K::Absolute, 32),
elf::R_MIPS_64 => r(K::Absolute, 64),
_ => unknown,
},
elf::EM_MSP430 => match r_type {
elf::R_MSP430_32 => (RelocationKind::Absolute, 32),
elf::R_MSP430_16_BYTE => (RelocationKind::Absolute, 16),
_ => (RelocationKind::Unknown, 0),
elf::R_MSP430_32 => r(K::Absolute, 32),
elf::R_MSP430_16_BYTE => r(K::Absolute, 16),
_ => unknown,
},
elf::EM_PPC => match r_type {
elf::R_PPC_ADDR32 => (RelocationKind::Absolute, 32),
_ => (RelocationKind::Unknown, 0),
elf::R_PPC_ADDR32 => r(K::Absolute, 32),
_ => unknown,
},
elf::EM_PPC64 => match r_type {
elf::R_PPC64_ADDR32 => (RelocationKind::Absolute, 32),
elf::R_PPC64_ADDR64 => (RelocationKind::Absolute, 64),
_ => (RelocationKind::Unknown, 0),
elf::R_PPC64_ADDR32 => r(K::Absolute, 32),
elf::R_PPC64_ADDR64 => r(K::Absolute, 64),
_ => unknown,
},
elf::EM_RISCV => match r_type {
elf::R_RISCV_32 => (RelocationKind::Absolute, 32),
elf::R_RISCV_64 => (RelocationKind::Absolute, 64),
_ => (RelocationKind::Unknown, 0),
elf::R_RISCV_32 => r(K::Absolute, 32),
elf::R_RISCV_64 => r(K::Absolute, 64),
_ => unknown,
},
elf::EM_S390 => match r_type {
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)
}
_ => (RelocationKind::Unknown, 0),
elf::R_390_8 => r(K::Absolute, 8),
elf::R_390_16 => r(K::Absolute, 16),
elf::R_390_32 => r(K::Absolute, 32),
elf::R_390_64 => r(K::Absolute, 64),
elf::R_390_PC16 => r(K::Relative, 16),
elf::R_390_PC32 => r(K::Relative, 32),
elf::R_390_PC64 => r(K::Relative, 64),
elf::R_390_PC16DBL => e(K::Relative, 16, E::S390xDbl),
elf::R_390_PC32DBL => e(K::Relative, 32, E::S390xDbl),
elf::R_390_PLT16DBL => e(K::PltRelative, 16, E::S390xDbl),
elf::R_390_PLT32DBL => e(K::PltRelative, 32, E::S390xDbl),
elf::R_390_GOT16 => r(K::Got, 16),
elf::R_390_GOT32 => r(K::Got, 32),
elf::R_390_GOT64 => r(K::Got, 64),
elf::R_390_GOTENT => e(K::GotRelative, 32, E::S390xDbl),
elf::R_390_GOTOFF16 => r(K::GotBaseOffset, 16),
elf::R_390_GOTOFF32 => r(K::GotBaseOffset, 32),
elf::R_390_GOTOFF64 => r(K::GotBaseOffset, 64),
elf::R_390_GOTPC => r(K::GotBaseRelative, 64),
elf::R_390_GOTPCDBL => e(K::GotBaseRelative, 32, E::S390xDbl),
_ => unknown,
},
elf::EM_SBF => match r_type {
elf::R_SBF_64_64 => (RelocationKind::Absolute, 64),
elf::R_SBF_64_32 => (RelocationKind::Absolute, 32),
_ => (RelocationKind::Unknown, 0),
elf::R_SBF_64_64 => r(K::Absolute, 64),
elf::R_SBF_64_32 => r(K::Absolute, 32),
_ => unknown,
},
elf::EM_SHARC => match r_type {
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)
}
_ => (RelocationKind::Unknown, 0),
elf::R_SHARC_ADDR24_V3 => e(K::Absolute, 24, E::SharcTypeA),
elf::R_SHARC_ADDR32_V3 => e(K::Absolute, 32, E::SharcTypeA),
elf::R_SHARC_ADDR_VAR_V3 => e(K::Absolute, 32, E::Generic),
elf::R_SHARC_PCRSHORT_V3 => e(K::Relative, 6, E::SharcTypeA),
elf::R_SHARC_PCRLONG_V3 => e(K::Relative, 24, E::SharcTypeA),
elf::R_SHARC_DATA6_V3 => e(K::Absolute, 6, E::SharcTypeA),
elf::R_SHARC_DATA16_V3 => e(K::Absolute, 16, E::SharcTypeA),
elf::R_SHARC_DATA6_VISA_V3 => e(K::Absolute, 6, E::SharcTypeB),
elf::R_SHARC_DATA7_VISA_V3 => e(K::Absolute, 7, E::SharcTypeB),
elf::R_SHARC_DATA16_VISA_V3 => e(K::Absolute, 16, E::SharcTypeB),
elf::R_SHARC_PCR6_VISA_V3 => e(K::Relative, 16, E::SharcTypeB),
elf::R_SHARC_ADDR_VAR16_V3 => e(K::Absolute, 16, E::Generic),
_ => unknown,
},
elf::EM_SPARC | elf::EM_SPARC32PLUS | elf::EM_SPARCV9 => match r_type {
elf::R_SPARC_32 | elf::R_SPARC_UA32 => (RelocationKind::Absolute, 32),
elf::R_SPARC_64 | elf::R_SPARC_UA64 => (RelocationKind::Absolute, 64),
_ => (RelocationKind::Unknown, 0),
elf::R_SPARC_32 | elf::R_SPARC_UA32 => r(K::Absolute, 32),
elf::R_SPARC_64 | elf::R_SPARC_UA64 => r(K::Absolute, 64),
_ => unknown,
},
elf::EM_XTENSA => match r_type {
elf::R_XTENSA_32 => (RelocationKind::Absolute, 32),
elf::R_XTENSA_32_PCREL => (RelocationKind::Relative, 32),
_ => (RelocationKind::Unknown, 0),
elf::R_XTENSA_32 => r(K::Absolute, 32),
elf::R_XTENSA_32_PCREL => r(K::Relative, 32),
_ => unknown,
},
_ => (RelocationKind::Unknown, 0),
_ => unknown,
};
let target = match reloc.symbol(endian, is_mips64el) {
None => RelocationTarget::Absolute,
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