2cf420d5b8
According to the description of the psABI v2.20: https://github.com/loongson/la-abi-specs/releases/tag/v2.20, adjustments are made to the function call instructions under the medium code model. At the same time, AsmParser has already supported parsing the call36 and tail36 macro instructions.
103 lines
3.7 KiB
C++
103 lines
3.7 KiB
C++
//===-- LoongArchELFObjectWriter.cpp - LoongArch ELF Writer ---*- C++ -*---===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "MCTargetDesc/LoongArchFixupKinds.h"
|
|
#include "MCTargetDesc/LoongArchMCTargetDesc.h"
|
|
#include "llvm/BinaryFormat/ELF.h"
|
|
#include "llvm/MC/MCContext.h"
|
|
#include "llvm/MC/MCELFObjectWriter.h"
|
|
#include "llvm/MC/MCFixup.h"
|
|
#include "llvm/MC/MCObjectWriter.h"
|
|
#include "llvm/Support/ErrorHandling.h"
|
|
|
|
using namespace llvm;
|
|
|
|
namespace {
|
|
class LoongArchELFObjectWriter : public MCELFObjectTargetWriter {
|
|
public:
|
|
LoongArchELFObjectWriter(uint8_t OSABI, bool Is64Bit, bool EnableRelax);
|
|
|
|
~LoongArchELFObjectWriter() override;
|
|
|
|
bool needsRelocateWithSymbol(const MCValue &Val, const MCSymbol &Sym,
|
|
unsigned Type) const override {
|
|
return EnableRelax;
|
|
}
|
|
|
|
protected:
|
|
unsigned getRelocType(MCContext &Ctx, const MCValue &Target,
|
|
const MCFixup &Fixup, bool IsPCRel) const override;
|
|
bool EnableRelax;
|
|
};
|
|
} // end namespace
|
|
|
|
LoongArchELFObjectWriter::LoongArchELFObjectWriter(uint8_t OSABI, bool Is64Bit,
|
|
bool EnableRelax)
|
|
: MCELFObjectTargetWriter(Is64Bit, OSABI, ELF::EM_LOONGARCH,
|
|
/*HasRelocationAddend=*/true),
|
|
EnableRelax(EnableRelax) {}
|
|
|
|
LoongArchELFObjectWriter::~LoongArchELFObjectWriter() {}
|
|
|
|
unsigned LoongArchELFObjectWriter::getRelocType(MCContext &Ctx,
|
|
const MCValue &Target,
|
|
const MCFixup &Fixup,
|
|
bool IsPCRel) const {
|
|
// Determine the type of the relocation
|
|
unsigned Kind = Fixup.getTargetKind();
|
|
|
|
if (Kind >= FirstLiteralRelocationKind)
|
|
return Kind - FirstLiteralRelocationKind;
|
|
|
|
switch (Kind) {
|
|
default:
|
|
Ctx.reportError(Fixup.getLoc(), "Unsupported relocation type");
|
|
return ELF::R_LARCH_NONE;
|
|
case FK_Data_1:
|
|
Ctx.reportError(Fixup.getLoc(), "1-byte data relocations not supported");
|
|
return ELF::R_LARCH_NONE;
|
|
case FK_Data_2:
|
|
Ctx.reportError(Fixup.getLoc(), "2-byte data relocations not supported");
|
|
return ELF::R_LARCH_NONE;
|
|
case FK_Data_4:
|
|
return IsPCRel ? ELF::R_LARCH_32_PCREL : ELF::R_LARCH_32;
|
|
case FK_Data_8:
|
|
return IsPCRel ? ELF::R_LARCH_64_PCREL : ELF::R_LARCH_64;
|
|
case LoongArch::fixup_loongarch_b16:
|
|
return ELF::R_LARCH_B16;
|
|
case LoongArch::fixup_loongarch_b21:
|
|
return ELF::R_LARCH_B21;
|
|
case LoongArch::fixup_loongarch_b26:
|
|
return ELF::R_LARCH_B26;
|
|
case LoongArch::fixup_loongarch_abs_hi20:
|
|
return ELF::R_LARCH_ABS_HI20;
|
|
case LoongArch::fixup_loongarch_abs_lo12:
|
|
return ELF::R_LARCH_ABS_LO12;
|
|
case LoongArch::fixup_loongarch_abs64_lo20:
|
|
return ELF::R_LARCH_ABS64_LO20;
|
|
case LoongArch::fixup_loongarch_abs64_hi12:
|
|
return ELF::R_LARCH_ABS64_HI12;
|
|
case LoongArch::fixup_loongarch_tls_le_hi20:
|
|
return ELF::R_LARCH_TLS_LE_HI20;
|
|
case LoongArch::fixup_loongarch_tls_le_lo12:
|
|
return ELF::R_LARCH_TLS_LE_LO12;
|
|
case LoongArch::fixup_loongarch_tls_le64_lo20:
|
|
return ELF::R_LARCH_TLS_LE64_LO20;
|
|
case LoongArch::fixup_loongarch_tls_le64_hi12:
|
|
return ELF::R_LARCH_TLS_LE64_HI12;
|
|
case LoongArch::fixup_loongarch_call36:
|
|
return ELF::R_LARCH_CALL36;
|
|
// TODO: Handle more fixup-kinds.
|
|
}
|
|
}
|
|
|
|
std::unique_ptr<MCObjectTargetWriter>
|
|
llvm::createLoongArchELFObjectWriter(uint8_t OSABI, bool Is64Bit, bool Relax) {
|
|
return std::make_unique<LoongArchELFObjectWriter>(OSABI, Is64Bit, Relax);
|
|
}
|