MipsELFWriterInfo.cpp [plain text]
#include "MipsELFWriterInfo.h"
#include "MipsRelocations.h"
#include "llvm/Function.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Target/TargetData.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Support/ELF.h"
using namespace llvm;
MipsELFWriterInfo::MipsELFWriterInfo(bool is64Bit_, bool isLittleEndian_)
: TargetELFWriterInfo(is64Bit_, isLittleEndian_) {
EMachine = EM_MIPS;
}
MipsELFWriterInfo::~MipsELFWriterInfo() {}
unsigned MipsELFWriterInfo::getRelocationType(unsigned MachineRelTy) const {
switch(MachineRelTy) {
case Mips::reloc_mips_pc16:
return ELF::R_MIPS_GOT16;
case Mips::reloc_mips_hi:
return ELF::R_MIPS_HI16;
case Mips::reloc_mips_lo:
return ELF::R_MIPS_LO16;
case Mips::reloc_mips_26:
return ELF::R_MIPS_26;
default:
llvm_unreachable("unknown Mips machine relocation type");
}
}
long int MipsELFWriterInfo::getDefaultAddendForRelTy(unsigned RelTy,
long int Modifier) const {
switch(RelTy) {
case ELF::R_MIPS_26: return Modifier;
default:
llvm_unreachable("unknown Mips relocation type");
}
}
unsigned MipsELFWriterInfo::getRelocationTySize(unsigned RelTy) const {
switch(RelTy) {
case ELF::R_MIPS_GOT16:
case ELF::R_MIPS_26:
return 32;
default:
llvm_unreachable("unknown Mips relocation type");
}
}
bool MipsELFWriterInfo::isPCRelativeRel(unsigned RelTy) const {
switch(RelTy) {
case ELF::R_MIPS_GOT16:
return true;
case ELF::R_MIPS_26:
return false;
default:
llvm_unreachable("unknown Mips relocation type");
}
}
unsigned MipsELFWriterInfo::getAbsoluteLabelMachineRelTy() const {
return Mips::reloc_mips_26;
}
long int MipsELFWriterInfo::computeRelocation(unsigned SymOffset,
unsigned RelOffset,
unsigned RelTy) const {
if (RelTy == ELF::R_MIPS_GOT16)
return SymOffset - (RelOffset + 4);
llvm_unreachable("computeRelocation unknown for this relocation type");
}