| //===-- X86ELFWriterInfo.cpp - ELF Writer Info for the X86 backend --------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file implements ELF writer information for the X86 backend. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "X86ELFWriterInfo.h" |
| #include "X86Relocations.h" |
| #include "llvm/Function.h" |
| #include "llvm/Support/ErrorHandling.h" |
| #include "llvm/Target/TargetData.h" |
| #include "llvm/Target/TargetMachine.h" |
| |
| using namespace llvm; |
| |
| //===----------------------------------------------------------------------===// |
| // Implementation of the X86ELFWriterInfo class |
| //===----------------------------------------------------------------------===// |
| |
| X86ELFWriterInfo::X86ELFWriterInfo(TargetMachine &TM) |
| : TargetELFWriterInfo(TM) { |
| bool is64Bit = TM.getTargetData()->getPointerSizeInBits() == 64; |
| EMachine = is64Bit ? EM_X86_64 : EM_386; |
| } |
| |
| X86ELFWriterInfo::~X86ELFWriterInfo() {} |
| |
| unsigned X86ELFWriterInfo::getRelocationType(unsigned MachineRelTy) const { |
| if (is64Bit) { |
| switch(MachineRelTy) { |
| case X86::reloc_pcrel_word: |
| return R_X86_64_PC32; |
| case X86::reloc_absolute_word: |
| return R_X86_64_32; |
| case X86::reloc_absolute_dword: |
| return R_X86_64_64; |
| case X86::reloc_picrel_word: |
| default: |
| llvm_unreachable("unknown relocation type"); |
| } |
| } else { |
| switch(MachineRelTy) { |
| case X86::reloc_pcrel_word: |
| return R_386_PC32; |
| case X86::reloc_absolute_word: |
| return R_386_32; |
| case X86::reloc_absolute_dword: |
| case X86::reloc_picrel_word: |
| default: |
| llvm_unreachable("unknown relocation type"); |
| } |
| } |
| return 0; |
| } |
| |
| long int X86ELFWriterInfo::getAddendForRelTy(unsigned RelTy) const { |
| if (is64Bit) { |
| switch(RelTy) { |
| case R_X86_64_PC32: return -4; |
| break; |
| default: |
| llvm_unreachable("unknown x86 relocation type"); |
| } |
| } |
| return 0; |
| } |