mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-23 19:23:23 +01:00
72e7abe0f8
Summary:
getRelocatedValue may compute incorrect value for SHT_RELA-typed relocation entries.
// DWARFDataExtractor.cpp
uint64_t DWARFDataExtractor::getRelocatedValue(uint32_t Size, uint32_t *Off,
...
// This formula is correct for REL, but may be incorrect for RELA if the value
// stored in the location (getUnsigned(Off, Size)) is not zero.
return getUnsigned(Off, Size) + Rel->Value;
In this patch, we
* refactor these visit* functions to include a new parameter `uint64_t A`.
Since these visit* functions are no longer used as visitors, rename them to resolve*.
+ REL: A is used as the addend. A is the value stored in the location where the
relocation applies: getUnsigned(Off, Size)
+ RELA: The addend encoded in RelocationRef is used, e.g. getELFAddend(R)
* and add another set of supports* functions to check if a given relocation type is handled.
DWARFObjInMemory uses them to fail early.
Reviewers: echristo, dblaikie
Reviewed By: echristo
Subscribers: mgorny, aprantl, aheejin, fedor.sergeev, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D57939
llvm-svn: 356729
498 lines
12 KiB
C++
498 lines
12 KiB
C++
//===- RelocationResolver.cpp ------------------------------------*- C++ -*-===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file defines utilities to resolve relocations in object files.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Object/RelocationResolver.h"
|
|
|
|
namespace llvm {
|
|
namespace object {
|
|
|
|
static int64_t getELFAddend(RelocationRef R) {
|
|
Expected<int64_t> AddendOrErr = ELFRelocationRef(R).getAddend();
|
|
handleAllErrors(AddendOrErr.takeError(), [](const ErrorInfoBase &EI) {
|
|
report_fatal_error(EI.message());
|
|
});
|
|
return *AddendOrErr;
|
|
}
|
|
|
|
static bool supportsX86_64(uint64_t Type) {
|
|
switch (Type) {
|
|
case ELF::R_X86_64_NONE:
|
|
case ELF::R_X86_64_64:
|
|
case ELF::R_X86_64_DTPOFF32:
|
|
case ELF::R_X86_64_DTPOFF64:
|
|
case ELF::R_X86_64_PC32:
|
|
case ELF::R_X86_64_32:
|
|
case ELF::R_X86_64_32S:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static uint64_t resolveX86_64(RelocationRef R, uint64_t S, uint64_t A) {
|
|
switch (R.getType()) {
|
|
case ELF::R_X86_64_NONE:
|
|
return A;
|
|
case ELF::R_X86_64_64:
|
|
case ELF::R_X86_64_DTPOFF32:
|
|
case ELF::R_X86_64_DTPOFF64:
|
|
return S + getELFAddend(R);
|
|
case ELF::R_X86_64_PC32:
|
|
return S + getELFAddend(R) - R.getOffset();
|
|
case ELF::R_X86_64_32:
|
|
case ELF::R_X86_64_32S:
|
|
return (S + getELFAddend(R)) & 0xFFFFFFFF;
|
|
default:
|
|
llvm_unreachable("Invalid relocation type");
|
|
}
|
|
}
|
|
|
|
static bool supportsAArch64(uint64_t Type) {
|
|
switch (Type) {
|
|
case ELF::R_AARCH64_ABS32:
|
|
case ELF::R_AARCH64_ABS64:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static uint64_t resolveAArch64(RelocationRef R, uint64_t S, uint64_t A) {
|
|
switch (R.getType()) {
|
|
case ELF::R_AARCH64_ABS32:
|
|
return (S + getELFAddend(R)) & 0xFFFFFFFF;
|
|
case ELF::R_AARCH64_ABS64:
|
|
return S + getELFAddend(R);
|
|
default:
|
|
llvm_unreachable("Invalid relocation type");
|
|
}
|
|
}
|
|
|
|
static bool supportsBPF(uint64_t Type) {
|
|
switch (Type) {
|
|
case ELF::R_BPF_64_32:
|
|
case ELF::R_BPF_64_64:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static uint64_t resolveBPF(RelocationRef R, uint64_t S, uint64_t A) {
|
|
switch (R.getType()) {
|
|
case ELF::R_BPF_64_32:
|
|
return S & 0xFFFFFFFF;
|
|
case ELF::R_BPF_64_64:
|
|
return S;
|
|
default:
|
|
llvm_unreachable("Invalid relocation type");
|
|
}
|
|
}
|
|
|
|
static bool supportsMips64(uint64_t Type) {
|
|
switch (Type) {
|
|
case ELF::R_MIPS_32:
|
|
case ELF::R_MIPS_64:
|
|
case ELF::R_MIPS_TLS_DTPREL64:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static uint64_t resolveMips64(RelocationRef R, uint64_t S, uint64_t A) {
|
|
switch (R.getType()) {
|
|
case ELF::R_MIPS_32:
|
|
return (S + getELFAddend(R)) & 0xFFFFFFFF;
|
|
case ELF::R_MIPS_64:
|
|
return S + getELFAddend(R);
|
|
case ELF::R_MIPS_TLS_DTPREL64:
|
|
return S + getELFAddend(R) - 0x8000;
|
|
default:
|
|
llvm_unreachable("Invalid relocation type");
|
|
}
|
|
}
|
|
|
|
static bool supportsPPC64(uint64_t Type) {
|
|
switch (Type) {
|
|
case ELF::R_PPC64_ADDR32:
|
|
case ELF::R_PPC64_ADDR64:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static uint64_t resolvePPC64(RelocationRef R, uint64_t S, uint64_t A) {
|
|
switch (R.getType()) {
|
|
case ELF::R_PPC64_ADDR32:
|
|
return (S + getELFAddend(R)) & 0xFFFFFFFF;
|
|
case ELF::R_PPC64_ADDR64:
|
|
return S + getELFAddend(R);
|
|
default:
|
|
llvm_unreachable("Invalid relocation type");
|
|
}
|
|
}
|
|
|
|
static bool supportsSystemZ(uint64_t Type) {
|
|
switch (Type) {
|
|
case ELF::R_390_32:
|
|
case ELF::R_390_64:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static uint64_t resolveSystemZ(RelocationRef R, uint64_t S, uint64_t A) {
|
|
switch (R.getType()) {
|
|
case ELF::R_390_32:
|
|
return (S + getELFAddend(R)) & 0xFFFFFFFF;
|
|
case ELF::R_390_64:
|
|
return S + getELFAddend(R);
|
|
default:
|
|
llvm_unreachable("Invalid relocation type");
|
|
}
|
|
}
|
|
|
|
static bool supportsSparc64(uint64_t Type) {
|
|
switch (Type) {
|
|
case ELF::R_SPARC_32:
|
|
case ELF::R_SPARC_64:
|
|
case ELF::R_SPARC_UA32:
|
|
case ELF::R_SPARC_UA64:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static uint64_t resolveSparc64(RelocationRef R, uint64_t S, uint64_t A) {
|
|
switch (R.getType()) {
|
|
case ELF::R_SPARC_32:
|
|
case ELF::R_SPARC_64:
|
|
case ELF::R_SPARC_UA32:
|
|
case ELF::R_SPARC_UA64:
|
|
return S + getELFAddend(R);
|
|
default:
|
|
llvm_unreachable("Invalid relocation type");
|
|
}
|
|
}
|
|
|
|
static bool supportsAmdgpu(uint64_t Type) {
|
|
switch (Type) {
|
|
case ELF::R_AMDGPU_ABS32:
|
|
case ELF::R_AMDGPU_ABS64:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static uint64_t resolveAmdgpu(RelocationRef R, uint64_t S, uint64_t A) {
|
|
switch (R.getType()) {
|
|
case ELF::R_AMDGPU_ABS32:
|
|
case ELF::R_AMDGPU_ABS64:
|
|
return S + getELFAddend(R);
|
|
default:
|
|
llvm_unreachable("Invalid relocation type");
|
|
}
|
|
}
|
|
|
|
static bool supportsX86(uint64_t Type) {
|
|
switch (Type) {
|
|
case ELF::R_386_NONE:
|
|
case ELF::R_386_32:
|
|
case ELF::R_386_PC32:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static uint64_t resolveX86(RelocationRef R, uint64_t S, uint64_t A) {
|
|
switch (R.getType()) {
|
|
case ELF::R_386_NONE:
|
|
return A;
|
|
case ELF::R_386_32:
|
|
return S + A;
|
|
case ELF::R_386_PC32:
|
|
return S - R.getOffset() + A;
|
|
default:
|
|
llvm_unreachable("Invalid relocation type");
|
|
}
|
|
}
|
|
|
|
static bool supportsPPC32(uint64_t Type) {
|
|
return Type == ELF::R_PPC_ADDR32;
|
|
}
|
|
|
|
static uint64_t resolvePPC32(RelocationRef R, uint64_t S, uint64_t A) {
|
|
if (R.getType() == ELF::R_PPC_ADDR32)
|
|
return (S + getELFAddend(R)) & 0xFFFFFFFF;
|
|
llvm_unreachable("Invalid relocation type");
|
|
}
|
|
|
|
static bool supportsARM(uint64_t Type) {
|
|
return Type == ELF::R_ARM_ABS32;
|
|
}
|
|
|
|
static uint64_t resolveARM(RelocationRef R, uint64_t S, uint64_t A) {
|
|
if (R.getType() == ELF::R_ARM_ABS32)
|
|
return (S + A) & 0xFFFFFFFF;
|
|
llvm_unreachable("Invalid relocation type");
|
|
}
|
|
|
|
static bool supportsAVR(uint64_t Type) {
|
|
switch (Type) {
|
|
case ELF::R_AVR_16:
|
|
case ELF::R_AVR_32:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static uint64_t resolveAVR(RelocationRef R, uint64_t S, uint64_t A) {
|
|
switch (R.getType()) {
|
|
case ELF::R_AVR_16:
|
|
return (S + getELFAddend(R)) & 0xFFFF;
|
|
case ELF::R_AVR_32:
|
|
return (S + getELFAddend(R)) & 0xFFFFFFFF;
|
|
default:
|
|
llvm_unreachable("Invalid relocation type");
|
|
}
|
|
}
|
|
|
|
static bool supportsLanai(uint64_t Type) {
|
|
return Type == ELF::R_LANAI_32;
|
|
}
|
|
|
|
static uint64_t resolveLanai(RelocationRef R, uint64_t S, uint64_t A) {
|
|
if (R.getType() == ELF::R_LANAI_32)
|
|
return (S + getELFAddend(R)) & 0xFFFFFFFF;
|
|
llvm_unreachable("Invalid relocation type");
|
|
}
|
|
|
|
static bool supportsMips32(uint64_t Type) {
|
|
switch (Type) {
|
|
case ELF::R_MIPS_32:
|
|
case ELF::R_MIPS_TLS_DTPREL32:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static uint64_t resolveMips32(RelocationRef R, uint64_t S, uint64_t A) {
|
|
// FIXME: Take in account implicit addends to get correct results.
|
|
uint32_t Rel = R.getType();
|
|
if (Rel == ELF::R_MIPS_32)
|
|
return (S + A) & 0xFFFFFFFF;
|
|
if (Rel == ELF::R_MIPS_TLS_DTPREL32)
|
|
return (S + A) & 0xFFFFFFFF;
|
|
llvm_unreachable("Invalid relocation type");
|
|
}
|
|
|
|
static bool supportsSparc32(uint64_t Type) {
|
|
switch (Type) {
|
|
case ELF::R_SPARC_32:
|
|
case ELF::R_SPARC_UA32:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static uint64_t resolveSparc32(RelocationRef R, uint64_t S, uint64_t A) {
|
|
uint32_t Rel = R.getType();
|
|
if (Rel == ELF::R_SPARC_32 || Rel == ELF::R_SPARC_UA32)
|
|
return S + getELFAddend(R);
|
|
return A;
|
|
}
|
|
|
|
static bool supportsHexagon(uint64_t Type) {
|
|
return Type == ELF::R_HEX_32;
|
|
}
|
|
|
|
static uint64_t resolveHexagon(RelocationRef R, uint64_t S, uint64_t A) {
|
|
if (R.getType() == ELF::R_HEX_32)
|
|
return S + getELFAddend(R);
|
|
llvm_unreachable("Invalid relocation type");
|
|
}
|
|
|
|
static bool supportsCOFFX86(uint64_t Type) {
|
|
switch (Type) {
|
|
case COFF::IMAGE_REL_I386_SECREL:
|
|
case COFF::IMAGE_REL_I386_DIR32:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static uint64_t resolveCOFFX86(RelocationRef R, uint64_t S, uint64_t A) {
|
|
switch (R.getType()) {
|
|
case COFF::IMAGE_REL_I386_SECREL:
|
|
case COFF::IMAGE_REL_I386_DIR32:
|
|
return (S + A) & 0xFFFFFFFF;
|
|
default:
|
|
llvm_unreachable("Invalid relocation type");
|
|
}
|
|
}
|
|
|
|
static bool supportsCOFFX86_64(uint64_t Type) {
|
|
switch (Type) {
|
|
case COFF::IMAGE_REL_AMD64_SECREL:
|
|
case COFF::IMAGE_REL_AMD64_ADDR64:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static uint64_t resolveCOFFX86_64(RelocationRef R, uint64_t S, uint64_t A) {
|
|
switch (R.getType()) {
|
|
case COFF::IMAGE_REL_AMD64_SECREL:
|
|
return (S + A) & 0xFFFFFFFF;
|
|
case COFF::IMAGE_REL_AMD64_ADDR64:
|
|
return S + A;
|
|
default:
|
|
llvm_unreachable("Invalid relocation type");
|
|
}
|
|
}
|
|
|
|
static bool supportsMachOX86_64(uint64_t Type) {
|
|
return Type == MachO::X86_64_RELOC_UNSIGNED;
|
|
}
|
|
|
|
static uint64_t resolveMachOX86_64(RelocationRef R, uint64_t S, uint64_t A) {
|
|
if (R.getType() == MachO::X86_64_RELOC_UNSIGNED)
|
|
return S;
|
|
llvm_unreachable("Invalid relocation type");
|
|
}
|
|
|
|
static bool supportsWasm32(uint64_t Type) {
|
|
switch (Type) {
|
|
case wasm::R_WASM_FUNCTION_INDEX_LEB:
|
|
case wasm::R_WASM_TABLE_INDEX_SLEB:
|
|
case wasm::R_WASM_TABLE_INDEX_I32:
|
|
case wasm::R_WASM_MEMORY_ADDR_LEB:
|
|
case wasm::R_WASM_MEMORY_ADDR_SLEB:
|
|
case wasm::R_WASM_MEMORY_ADDR_I32:
|
|
case wasm::R_WASM_TYPE_INDEX_LEB:
|
|
case wasm::R_WASM_GLOBAL_INDEX_LEB:
|
|
case wasm::R_WASM_FUNCTION_OFFSET_I32:
|
|
case wasm::R_WASM_SECTION_OFFSET_I32:
|
|
case wasm::R_WASM_EVENT_INDEX_LEB:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static uint64_t resolveWasm32(RelocationRef R, uint64_t S, uint64_t A) {
|
|
switch (R.getType()) {
|
|
case wasm::R_WASM_FUNCTION_INDEX_LEB:
|
|
case wasm::R_WASM_TABLE_INDEX_SLEB:
|
|
case wasm::R_WASM_TABLE_INDEX_I32:
|
|
case wasm::R_WASM_MEMORY_ADDR_LEB:
|
|
case wasm::R_WASM_MEMORY_ADDR_SLEB:
|
|
case wasm::R_WASM_MEMORY_ADDR_I32:
|
|
case wasm::R_WASM_TYPE_INDEX_LEB:
|
|
case wasm::R_WASM_GLOBAL_INDEX_LEB:
|
|
case wasm::R_WASM_FUNCTION_OFFSET_I32:
|
|
case wasm::R_WASM_SECTION_OFFSET_I32:
|
|
case wasm::R_WASM_EVENT_INDEX_LEB:
|
|
// For wasm section, its offset at 0 -- ignoring Value
|
|
return A;
|
|
default:
|
|
llvm_unreachable("Invalid relocation type");
|
|
}
|
|
}
|
|
|
|
std::pair<bool (*)(uint64_t), RelocationResolver>
|
|
getRelocationResolver(const ObjectFile &Obj) {
|
|
if (Obj.isCOFF()) {
|
|
if (Obj.getBytesInAddress() == 8)
|
|
return {supportsCOFFX86_64, resolveCOFFX86_64};
|
|
return {supportsCOFFX86, resolveCOFFX86};
|
|
} else if (Obj.isELF()) {
|
|
if (Obj.getBytesInAddress() == 8) {
|
|
switch (Obj.getArch()) {
|
|
case Triple::x86_64:
|
|
return {supportsX86_64, resolveX86_64};
|
|
case Triple::aarch64:
|
|
case Triple::aarch64_be:
|
|
return {supportsAArch64, resolveAArch64};
|
|
case Triple::bpfel:
|
|
case Triple::bpfeb:
|
|
return {supportsBPF, resolveBPF};
|
|
case Triple::mips64el:
|
|
case Triple::mips64:
|
|
return {supportsMips64, resolveMips64};
|
|
case Triple::ppc64le:
|
|
case Triple::ppc64:
|
|
return {supportsPPC64, resolvePPC64};
|
|
case Triple::systemz:
|
|
return {supportsSystemZ, resolveSystemZ};
|
|
case Triple::sparcv9:
|
|
return {supportsSparc64, resolveSparc64};
|
|
case Triple::amdgcn:
|
|
return {supportsAmdgpu, resolveAmdgpu};
|
|
default:
|
|
return {nullptr, nullptr};
|
|
}
|
|
}
|
|
|
|
// 32-bit object file
|
|
assert(Obj.getBytesInAddress() == 4 &&
|
|
"Invalid word size in object file");
|
|
|
|
switch (Obj.getArch()) {
|
|
case Triple::x86:
|
|
return {supportsX86, resolveX86};
|
|
case Triple::ppc:
|
|
return {supportsPPC32, resolvePPC32};
|
|
case Triple::arm:
|
|
case Triple::armeb:
|
|
return {supportsARM, resolveARM};
|
|
case Triple::avr:
|
|
return {supportsAVR, resolveAVR};
|
|
case Triple::lanai:
|
|
return {supportsLanai, resolveLanai};
|
|
case Triple::mipsel:
|
|
case Triple::mips:
|
|
return {supportsMips32, resolveMips32};
|
|
case Triple::sparc:
|
|
return {supportsSparc32, resolveSparc32};
|
|
case Triple::hexagon:
|
|
return {supportsHexagon, resolveHexagon};
|
|
default:
|
|
return {nullptr, nullptr};
|
|
}
|
|
} else if (Obj.isMachO()) {
|
|
if (Obj.getArch() == Triple::x86_64)
|
|
return {supportsMachOX86_64, resolveMachOX86_64};
|
|
return {nullptr, nullptr};
|
|
} else if (Obj.isWasm()) {
|
|
if (Obj.getArch() == Triple::wasm32)
|
|
return {supportsWasm32, resolveWasm32};
|
|
return {nullptr, nullptr};
|
|
}
|
|
|
|
llvm_unreachable("Invalid object file");
|
|
}
|
|
|
|
} // namespace object
|
|
} // namespace llvm
|