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Diffstat (limited to 'include/llvm/Object/RelocVisitor.h')
| -rw-r--r-- | include/llvm/Object/RelocVisitor.h | 351 |
1 files changed, 0 insertions, 351 deletions
diff --git a/include/llvm/Object/RelocVisitor.h b/include/llvm/Object/RelocVisitor.h deleted file mode 100644 index 9a978de2e599..000000000000 --- a/include/llvm/Object/RelocVisitor.h +++ /dev/null @@ -1,351 +0,0 @@ -//===- RelocVisitor.h - Visitor for object file relocations -----*- C++ -*-===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// -// -// This file provides a wrapper around all the different types of relocations -// in different file formats, such that a client can handle them in a unified -// manner by only implementing a minimal number of functions. -// -//===----------------------------------------------------------------------===// - -#ifndef LLVM_OBJECT_RELOCVISITOR_H -#define LLVM_OBJECT_RELOCVISITOR_H - -#include "llvm/ADT/Triple.h" -#include "llvm/BinaryFormat/ELF.h" -#include "llvm/BinaryFormat/MachO.h" -#include "llvm/Object/COFF.h" -#include "llvm/Object/ELFObjectFile.h" -#include "llvm/Object/MachO.h" -#include "llvm/Object/ObjectFile.h" -#include "llvm/Object/Wasm.h" -#include "llvm/Support/Casting.h" -#include "llvm/Support/ErrorHandling.h" -#include <cstdint> -#include <system_error> - -namespace llvm { -namespace object { - -/// Base class for object file relocation visitors. -class RelocVisitor { -public: - explicit RelocVisitor(const ObjectFile &Obj) : ObjToVisit(Obj) {} - - // TODO: Should handle multiple applied relocations via either passing in the - // previously computed value or just count paired relocations as a single - // visit. - uint64_t visit(uint32_t Rel, RelocationRef R, uint64_t Value = 0) { - if (isa<ELFObjectFileBase>(ObjToVisit)) - return visitELF(Rel, R, Value); - if (isa<COFFObjectFile>(ObjToVisit)) - return visitCOFF(Rel, R, Value); - if (isa<MachOObjectFile>(ObjToVisit)) - return visitMachO(Rel, R, Value); - if (isa<WasmObjectFile>(ObjToVisit)) - return visitWasm(Rel, R, Value); - - HasError = true; - return 0; - } - - bool error() { return HasError; } - -private: - const ObjectFile &ObjToVisit; - bool HasError = false; - - uint64_t visitELF(uint32_t Rel, RelocationRef R, uint64_t Value) { - if (ObjToVisit.getBytesInAddress() == 8) { // 64-bit object file - switch (ObjToVisit.getArch()) { - case Triple::x86_64: - return visitX86_64(Rel, R, Value); - case Triple::aarch64: - case Triple::aarch64_be: - return visitAarch64(Rel, R, Value); - case Triple::bpfel: - case Triple::bpfeb: - return visitBpf(Rel, R, Value); - case Triple::mips64el: - case Triple::mips64: - return visitMips64(Rel, R, Value); - case Triple::ppc64le: - case Triple::ppc64: - return visitPPC64(Rel, R, Value); - case Triple::systemz: - return visitSystemz(Rel, R, Value); - case Triple::sparcv9: - return visitSparc64(Rel, R, Value); - case Triple::amdgcn: - return visitAmdgpu(Rel, R, Value); - default: - HasError = true; - return 0; - } - } - - // 32-bit object file - assert(ObjToVisit.getBytesInAddress() == 4 && - "Invalid word size in object file"); - - switch (ObjToVisit.getArch()) { - case Triple::x86: - return visitX86(Rel, R, Value); - case Triple::ppc: - return visitPPC32(Rel, R, Value); - case Triple::arm: - case Triple::armeb: - return visitARM(Rel, R, Value); - case Triple::lanai: - return visitLanai(Rel, R, Value); - case Triple::mipsel: - case Triple::mips: - return visitMips32(Rel, R, Value); - case Triple::sparc: - return visitSparc32(Rel, R, Value); - case Triple::hexagon: - return visitHexagon(Rel, R, Value); - default: - HasError = true; - return 0; - } - } - - 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; - } - - uint64_t visitX86_64(uint32_t Rel, RelocationRef R, uint64_t Value) { - switch (Rel) { - case ELF::R_X86_64_NONE: - return 0; - case ELF::R_X86_64_64: - case ELF::R_X86_64_DTPOFF32: - case ELF::R_X86_64_DTPOFF64: - return Value + getELFAddend(R); - case ELF::R_X86_64_PC32: - return Value + getELFAddend(R) - R.getOffset(); - case ELF::R_X86_64_32: - case ELF::R_X86_64_32S: - return (Value + getELFAddend(R)) & 0xFFFFFFFF; - } - HasError = true; - return 0; - } - - uint64_t visitAarch64(uint32_t Rel, RelocationRef R, uint64_t Value) { - switch (Rel) { - case ELF::R_AARCH64_ABS32: { - int64_t Res = Value + getELFAddend(R); - if (Res < INT32_MIN || Res > UINT32_MAX) - HasError = true; - return static_cast<uint32_t>(Res); - } - case ELF::R_AARCH64_ABS64: - return Value + getELFAddend(R); - } - HasError = true; - return 0; - } - - uint64_t visitBpf(uint32_t Rel, RelocationRef R, uint64_t Value) { - switch (Rel) { - case ELF::R_BPF_64_32: - return Value & 0xFFFFFFFF; - case ELF::R_BPF_64_64: - return Value; - } - HasError = true; - return 0; - } - - uint64_t visitMips64(uint32_t Rel, RelocationRef R, uint64_t Value) { - switch (Rel) { - case ELF::R_MIPS_32: - return (Value + getELFAddend(R)) & 0xFFFFFFFF; - case ELF::R_MIPS_64: - return Value + getELFAddend(R); - case ELF::R_MIPS_TLS_DTPREL64: - return Value + getELFAddend(R) - 0x8000; - } - HasError = true; - return 0; - } - - uint64_t visitPPC64(uint32_t Rel, RelocationRef R, uint64_t Value) { - switch (Rel) { - case ELF::R_PPC64_ADDR32: - return (Value + getELFAddend(R)) & 0xFFFFFFFF; - case ELF::R_PPC64_ADDR64: - return Value + getELFAddend(R); - } - HasError = true; - return 0; - } - - uint64_t visitSystemz(uint32_t Rel, RelocationRef R, uint64_t Value) { - switch (Rel) { - case ELF::R_390_32: { - int64_t Res = Value + getELFAddend(R); - if (Res < INT32_MIN || Res > UINT32_MAX) - HasError = true; - return static_cast<uint32_t>(Res); - } - case ELF::R_390_64: - return Value + getELFAddend(R); - } - HasError = true; - return 0; - } - - uint64_t visitSparc64(uint32_t Rel, RelocationRef R, uint64_t Value) { - switch (Rel) { - case ELF::R_SPARC_32: - case ELF::R_SPARC_64: - case ELF::R_SPARC_UA32: - case ELF::R_SPARC_UA64: - return Value + getELFAddend(R); - } - HasError = true; - return 0; - } - - uint64_t visitAmdgpu(uint32_t Rel, RelocationRef R, uint64_t Value) { - switch (Rel) { - case ELF::R_AMDGPU_ABS32: - case ELF::R_AMDGPU_ABS64: - return Value + getELFAddend(R); - } - HasError = true; - return 0; - } - - uint64_t visitX86(uint32_t Rel, RelocationRef R, uint64_t Value) { - switch (Rel) { - case ELF::R_386_NONE: - return 0; - case ELF::R_386_32: - return Value; - case ELF::R_386_PC32: - return Value - R.getOffset(); - } - HasError = true; - return 0; - } - - uint64_t visitPPC32(uint32_t Rel, RelocationRef R, uint64_t Value) { - if (Rel == ELF::R_PPC_ADDR32) - return (Value + getELFAddend(R)) & 0xFFFFFFFF; - HasError = true; - return 0; - } - - uint64_t visitARM(uint32_t Rel, RelocationRef R, uint64_t Value) { - if (Rel == ELF::R_ARM_ABS32) { - if ((int64_t)Value < INT32_MIN || (int64_t)Value > UINT32_MAX) - HasError = true; - return static_cast<uint32_t>(Value); - } - HasError = true; - return 0; - } - - uint64_t visitLanai(uint32_t Rel, RelocationRef R, uint64_t Value) { - if (Rel == ELF::R_LANAI_32) - return (Value + getELFAddend(R)) & 0xFFFFFFFF; - HasError = true; - return 0; - } - - uint64_t visitMips32(uint32_t Rel, RelocationRef R, uint64_t Value) { - // FIXME: Take in account implicit addends to get correct results. - if (Rel == ELF::R_MIPS_32) - return Value & 0xFFFFFFFF; - if (Rel == ELF::R_MIPS_TLS_DTPREL32) - return Value & 0xFFFFFFFF; - HasError = true; - return 0; - } - - uint64_t visitSparc32(uint32_t Rel, RelocationRef R, uint64_t Value) { - if (Rel == ELF::R_SPARC_32 || Rel == ELF::R_SPARC_UA32) - return Value + getELFAddend(R); - HasError = true; - return 0; - } - - uint64_t visitHexagon(uint32_t Rel, RelocationRef R, uint64_t Value) { - if (Rel == ELF::R_HEX_32) - return Value + getELFAddend(R); - HasError = true; - return 0; - } - - uint64_t visitCOFF(uint32_t Rel, RelocationRef R, uint64_t Value) { - switch (ObjToVisit.getArch()) { - case Triple::x86: - switch (Rel) { - case COFF::IMAGE_REL_I386_SECREL: - case COFF::IMAGE_REL_I386_DIR32: - return static_cast<uint32_t>(Value); - } - break; - case Triple::x86_64: - switch (Rel) { - case COFF::IMAGE_REL_AMD64_SECREL: - return static_cast<uint32_t>(Value); - case COFF::IMAGE_REL_AMD64_ADDR64: - return Value; - } - break; - default: - break; - } - HasError = true; - return 0; - } - - uint64_t visitMachO(uint32_t Rel, RelocationRef R, uint64_t Value) { - if (ObjToVisit.getArch() == Triple::x86_64 && - Rel == MachO::X86_64_RELOC_UNSIGNED) - return Value; - HasError = true; - return 0; - } - - uint64_t visitWasm(uint32_t Rel, RelocationRef R, uint64_t Value) { - if (ObjToVisit.getArch() == Triple::wasm32) { - switch (Rel) { - case wasm::R_WEBASSEMBLY_FUNCTION_INDEX_LEB: - case wasm::R_WEBASSEMBLY_TABLE_INDEX_SLEB: - case wasm::R_WEBASSEMBLY_TABLE_INDEX_I32: - case wasm::R_WEBASSEMBLY_MEMORY_ADDR_LEB: - case wasm::R_WEBASSEMBLY_MEMORY_ADDR_SLEB: - case wasm::R_WEBASSEMBLY_MEMORY_ADDR_I32: - case wasm::R_WEBASSEMBLY_TYPE_INDEX_LEB: - case wasm::R_WEBASSEMBLY_GLOBAL_INDEX_LEB: - case wasm::R_WEBASSEMBLY_FUNCTION_OFFSET_I32: - case wasm::R_WEBASSEMBLY_SECTION_OFFSET_I32: - case wasm::R_WEBASSEMBLY_EVENT_INDEX_LEB: - // For wasm section, its offset at 0 -- ignoring Value - return 0; - } - } - HasError = true; - return 0; - } -}; - -} // end namespace object -} // end namespace llvm - -#endif // LLVM_OBJECT_RELOCVISITOR_H |