#include "X86ELFWriterInfo.h"
#include "X86Relocations.h"
#include "llvm/Function.h"
+#include "llvm/Support/ELF.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Target/TargetData.h"
#include "llvm/Target/TargetMachine.h"
// Implementation of the X86ELFWriterInfo class
//===----------------------------------------------------------------------===//
-X86ELFWriterInfo::X86ELFWriterInfo(TargetMachine &TM)
- : TargetELFWriterInfo(TM) {
- bool is64Bit = TM.getTargetData()->getPointerSizeInBits() == 64;
+X86ELFWriterInfo::X86ELFWriterInfo(bool is64Bit_, bool isLittleEndian_)
+ : TargetELFWriterInfo(is64Bit_, isLittleEndian_) {
EMachine = is64Bit ? EM_X86_64 : EM_386;
}
if (is64Bit) {
switch(MachineRelTy) {
case X86::reloc_pcrel_word:
- return R_X86_64_PC32;
+ return ELF::R_X86_64_PC32;
case X86::reloc_absolute_word:
- return R_X86_64_32;
+ return ELF::R_X86_64_32;
+ case X86::reloc_absolute_word_sext:
+ return ELF::R_X86_64_32S;
case X86::reloc_absolute_dword:
- return R_X86_64_64;
+ return ELF::R_X86_64_64;
case X86::reloc_picrel_word:
default:
llvm_unreachable("unknown x86_64 machine relocation type");
} else {
switch(MachineRelTy) {
case X86::reloc_pcrel_word:
- return R_386_PC32;
+ return ELF::R_386_PC32;
case X86::reloc_absolute_word:
- return R_386_32;
+ return ELF::R_386_32;
+ case X86::reloc_absolute_word_sext:
case X86::reloc_absolute_dword:
case X86::reloc_picrel_word:
default:
return 0;
}
-long int X86ELFWriterInfo::getDefaultAddendForRelTy(unsigned RelTy) const {
+long int X86ELFWriterInfo::getDefaultAddendForRelTy(unsigned RelTy,
+ long int Modifier) const {
if (is64Bit) {
switch(RelTy) {
- case R_X86_64_PC32: return -4;
- case R_X86_64_32: return 0;
+ case ELF::R_X86_64_PC32: return Modifier - 4;
+ case ELF::R_X86_64_32:
+ case ELF::R_X86_64_32S:
+ case ELF::R_X86_64_64:
+ return Modifier;
default:
llvm_unreachable("unknown x86_64 relocation type");
}
} else {
switch(RelTy) {
- case R_386_PC32: return -4;
- case R_386_32: return 0;
+ case ELF::R_386_PC32: return Modifier - 4;
+ case ELF::R_386_32: return Modifier;
default:
llvm_unreachable("unknown x86 relocation type");
}
unsigned X86ELFWriterInfo::getRelocationTySize(unsigned RelTy) const {
if (is64Bit) {
switch(RelTy) {
- case R_X86_64_PC32:
- case R_X86_64_32:
- case R_X86_64_32S:
+ case ELF::R_X86_64_PC32:
+ case ELF::R_X86_64_32:
+ case ELF::R_X86_64_32S:
return 32;
- case R_X86_64_64:
+ case ELF::R_X86_64_64:
return 64;
default:
llvm_unreachable("unknown x86_64 relocation type");
}
} else {
switch(RelTy) {
- case R_386_PC32:
- case R_386_32:
+ case ELF::R_386_PC32:
+ case ELF::R_386_32:
return 32;
default:
llvm_unreachable("unknown x86 relocation type");
return 0;
}
+bool X86ELFWriterInfo::isPCRelativeRel(unsigned RelTy) const {
+ if (is64Bit) {
+ switch(RelTy) {
+ case ELF::R_X86_64_PC32:
+ return true;
+ case ELF::R_X86_64_32:
+ case ELF::R_X86_64_32S:
+ case ELF::R_X86_64_64:
+ return false;
+ default:
+ llvm_unreachable("unknown x86_64 relocation type");
+ }
+ } else {
+ switch(RelTy) {
+ case ELF::R_386_PC32:
+ return true;
+ case ELF::R_386_32:
+ return false;
+ default:
+ llvm_unreachable("unknown x86 relocation type");
+ }
+ }
+ return 0;
+}
+
unsigned X86ELFWriterInfo::getAbsoluteLabelMachineRelTy() const {
return is64Bit ?
X86::reloc_absolute_dword : X86::reloc_absolute_word;
}
+long int X86ELFWriterInfo::computeRelocation(unsigned SymOffset,
+ unsigned RelOffset,
+ unsigned RelTy) const {
+
+ if (RelTy == ELF::R_X86_64_PC32 || RelTy == ELF::R_386_PC32)
+ return SymOffset - (RelOffset + 4);
+ else
+ assert("computeRelocation unknown for this relocation type");
+
+ return 0;
+}