forked from OSchip/llvm-project
138 lines
4.4 KiB
C++
138 lines
4.4 KiB
C++
//===-- MipsELFObjectWriter.cpp - Mips ELF Writer -------------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "MCTargetDesc/MipsFixupKinds.h"
|
|
#include "MCTargetDesc/MipsMCTargetDesc.h"
|
|
#include "llvm/MC/MCELFObjectWriter.h"
|
|
#include "llvm/MC/MCExpr.h"
|
|
#include "llvm/MC/MCSection.h"
|
|
#include "llvm/MC/MCValue.h"
|
|
#include "llvm/Support/ErrorHandling.h"
|
|
|
|
using namespace llvm;
|
|
|
|
namespace {
|
|
class MipsELFObjectWriter : public MCELFObjectTargetWriter {
|
|
public:
|
|
MipsELFObjectWriter(uint8_t OSABI);
|
|
|
|
virtual ~MipsELFObjectWriter();
|
|
|
|
virtual unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup,
|
|
bool IsPCRel, bool IsRelocWithSymbol,
|
|
int64_t Addend) const;
|
|
virtual unsigned getEFlags() const;
|
|
virtual const MCSymbol *ExplicitRelSym(const MCAssembler &Asm,
|
|
const MCValue &Target,
|
|
const MCFragment &F,
|
|
const MCFixup &Fixup,
|
|
bool IsPCRel) const;
|
|
};
|
|
}
|
|
|
|
MipsELFObjectWriter::MipsELFObjectWriter(uint8_t OSABI)
|
|
: MCELFObjectTargetWriter(/*Is64Bit*/ false, OSABI, ELF::EM_MIPS,
|
|
/*HasRelocationAddend*/ false) {}
|
|
|
|
MipsELFObjectWriter::~MipsELFObjectWriter() {}
|
|
|
|
// FIXME: get the real EABI Version from the Triple.
|
|
unsigned MipsELFObjectWriter::getEFlags() const {
|
|
return ELF::EF_MIPS_NOREORDER | ELF::EF_MIPS_ARCH_32R2;
|
|
}
|
|
|
|
const MCSymbol *MipsELFObjectWriter::ExplicitRelSym(const MCAssembler &Asm,
|
|
const MCValue &Target,
|
|
const MCFragment &F,
|
|
const MCFixup &Fixup,
|
|
bool IsPCRel) const {
|
|
assert(Target.getSymA() && "SymA cannot be 0.");
|
|
const MCSymbol &Sym = Target.getSymA()->getSymbol().AliasedSymbol();
|
|
|
|
if (Sym.getSection().getKind().isMergeableCString() ||
|
|
Sym.getSection().getKind().isMergeableConst())
|
|
return &Sym;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
unsigned MipsELFObjectWriter::GetRelocType(const MCValue &Target,
|
|
const MCFixup &Fixup,
|
|
bool IsPCRel,
|
|
bool IsRelocWithSymbol,
|
|
int64_t Addend) const {
|
|
// determine the type of the relocation
|
|
unsigned Type = (unsigned)ELF::R_MIPS_NONE;
|
|
unsigned Kind = (unsigned)Fixup.getKind();
|
|
|
|
switch (Kind) {
|
|
default:
|
|
llvm_unreachable("invalid fixup kind!");
|
|
case FK_Data_4:
|
|
Type = ELF::R_MIPS_32;
|
|
break;
|
|
case FK_GPRel_4:
|
|
Type = ELF::R_MIPS_GPREL32;
|
|
break;
|
|
case Mips::fixup_Mips_GPREL16:
|
|
Type = ELF::R_MIPS_GPREL16;
|
|
break;
|
|
case Mips::fixup_Mips_26:
|
|
Type = ELF::R_MIPS_26;
|
|
break;
|
|
case Mips::fixup_Mips_CALL16:
|
|
Type = ELF::R_MIPS_CALL16;
|
|
break;
|
|
case Mips::fixup_Mips_GOT_Global:
|
|
case Mips::fixup_Mips_GOT_Local:
|
|
Type = ELF::R_MIPS_GOT16;
|
|
break;
|
|
case Mips::fixup_Mips_HI16:
|
|
Type = ELF::R_MIPS_HI16;
|
|
break;
|
|
case Mips::fixup_Mips_LO16:
|
|
Type = ELF::R_MIPS_LO16;
|
|
break;
|
|
case Mips::fixup_Mips_TLSGD:
|
|
Type = ELF::R_MIPS_TLS_GD;
|
|
break;
|
|
case Mips::fixup_Mips_GOTTPREL:
|
|
Type = ELF::R_MIPS_TLS_GOTTPREL;
|
|
break;
|
|
case Mips::fixup_Mips_TPREL_HI:
|
|
Type = ELF::R_MIPS_TLS_TPREL_HI16;
|
|
break;
|
|
case Mips::fixup_Mips_TPREL_LO:
|
|
Type = ELF::R_MIPS_TLS_TPREL_LO16;
|
|
break;
|
|
case Mips::fixup_Mips_TLSLDM:
|
|
Type = ELF::R_MIPS_TLS_LDM;
|
|
break;
|
|
case Mips::fixup_Mips_DTPREL_HI:
|
|
Type = ELF::R_MIPS_TLS_DTPREL_HI16;
|
|
break;
|
|
case Mips::fixup_Mips_DTPREL_LO:
|
|
Type = ELF::R_MIPS_TLS_DTPREL_LO16;
|
|
break;
|
|
case Mips::fixup_Mips_Branch_PCRel:
|
|
case Mips::fixup_Mips_PC16:
|
|
Type = ELF::R_MIPS_PC16;
|
|
break;
|
|
}
|
|
|
|
return Type;
|
|
}
|
|
|
|
MCObjectWriter *llvm::createMipsELFObjectWriter(raw_ostream &OS,
|
|
bool IsLittleEndian,
|
|
uint8_t OSABI) {
|
|
MCELFObjectTargetWriter *MOTW = new MipsELFObjectWriter(OSABI);
|
|
return createELFObjectWriter(MOTW, OS, IsLittleEndian);
|
|
}
|