1 //===-- X86ELFWriterInfo.cpp - ELF Writer Info for the X86 backend --------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements ELF writer information for the X86 backend.
12 //===----------------------------------------------------------------------===//
14 #include "X86ELFWriterInfo.h"
15 #include "X86Relocations.h"
16 #include "llvm/Function.h"
17 #include "llvm/Support/ErrorHandling.h"
18 #include "llvm/Target/TargetData.h"
19 #include "llvm/Target/TargetMachine.h"
23 //===----------------------------------------------------------------------===//
24 // Implementation of the X86ELFWriterInfo class
25 //===----------------------------------------------------------------------===//
27 X86ELFWriterInfo::X86ELFWriterInfo(TargetMachine &TM)
28 : TargetELFWriterInfo(TM) {
29 bool is64Bit = TM.getTargetData()->getPointerSizeInBits() == 64;
30 EMachine = is64Bit ? EM_X86_64 : EM_386;
33 X86ELFWriterInfo::~X86ELFWriterInfo() {}
35 unsigned X86ELFWriterInfo::getRelocationType(unsigned MachineRelTy) const {
37 switch(MachineRelTy) {
38 case X86::reloc_pcrel_word:
40 case X86::reloc_absolute_word:
42 case X86::reloc_absolute_dword:
44 case X86::reloc_picrel_word:
46 LLVM_UNREACHABLE("unknown relocation type");
49 switch(MachineRelTy) {
50 case X86::reloc_pcrel_word:
52 case X86::reloc_absolute_word:
54 case X86::reloc_absolute_dword:
55 case X86::reloc_picrel_word:
57 LLVM_UNREACHABLE("unknown relocation type");
63 long int X86ELFWriterInfo::getAddendForRelTy(unsigned RelTy) const {
66 case R_X86_64_PC32: return -4;
69 LLVM_UNREACHABLE("unknown x86 relocation type");