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//===-- LanaiELFObjectWriter.cpp - Lanai 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/LanaiBaseInfo.h"
#include "MCTargetDesc/LanaiFixupKinds.h"
#include "llvm/BinaryFormat/ELF.h"
#include "llvm/MC/MCELFObjectWriter.h"
#include "llvm/Support/ErrorHandling.h"
using namespace llvm;
namespace {
class LanaiELFObjectWriter : public MCELFObjectTargetWriter {
public:
explicit LanaiELFObjectWriter(uint8_t OSABI);
~LanaiELFObjectWriter() override = default;
protected:
unsigned getRelocType(MCContext &Ctx, const MCValue &Target,
const MCFixup &Fixup, bool IsPCRel) const override;
bool needsRelocateWithSymbol(const MCSymbol &SD,
unsigned Type) const override;
};
} // end anonymous namespace
LanaiELFObjectWriter::LanaiELFObjectWriter(uint8_t OSABI)
: MCELFObjectTargetWriter(/*Is64Bit_=*/false, OSABI, ELF::EM_LANAI,
/*HasRelocationAddend=*/true) {}
unsigned LanaiELFObjectWriter::getRelocType(MCContext & /*Ctx*/,
const MCValue & /*Target*/,
const MCFixup &Fixup,
bool /*IsPCRel*/) const {
unsigned Type;
unsigned Kind = static_cast<unsigned>(Fixup.getKind());
switch (Kind) {
case Lanai::FIXUP_LANAI_21:
Type = ELF::R_LANAI_21;
break;
case Lanai::FIXUP_LANAI_21_F:
Type = ELF::R_LANAI_21_F;
break;
case Lanai::FIXUP_LANAI_25:
Type = ELF::R_LANAI_25;
break;
case Lanai::FIXUP_LANAI_32:
case FK_Data_4:
Type = ELF::R_LANAI_32;
break;
case Lanai::FIXUP_LANAI_HI16:
Type = ELF::R_LANAI_HI16;
break;
case Lanai::FIXUP_LANAI_LO16:
Type = ELF::R_LANAI_LO16;
break;
case Lanai::FIXUP_LANAI_NONE:
Type = ELF::R_LANAI_NONE;
break;
default:
llvm_unreachable("Invalid fixup kind!");
}
return Type;
}
bool LanaiELFObjectWriter::needsRelocateWithSymbol(const MCSymbol & /*SD*/,
unsigned Type) const {
switch (Type) {
case ELF::R_LANAI_21:
case ELF::R_LANAI_21_F:
case ELF::R_LANAI_25:
case ELF::R_LANAI_32:
case ELF::R_LANAI_HI16:
return true;
default:
return false;
}
}
MCObjectWriter *llvm::createLanaiELFObjectWriter(raw_pwrite_stream &OS,
uint8_t OSABI) {
MCELFObjectTargetWriter *MOTW = new LanaiELFObjectWriter(OSABI);
return createELFObjectWriter(MOTW, OS, /*IsLittleEndian=*/false);
}
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