8f671a675f
This commit changes all relocations to be relocated with symbols. Without this commit, errors may occur in some cases, such as when using `llc/lto+relax`, or combining relaxed and norelaxed object files using `ld -r`. Some tests updated.
106 lines
3.5 KiB
C++
106 lines
3.5 KiB
C++
//===-- LoongArchELFObjectWriter.cpp - LoongArch ELF Writer ---*- C++ -*---===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "MCTargetDesc/LoongArchFixupKinds.h"
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#include "MCTargetDesc/LoongArchMCTargetDesc.h"
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#include "llvm/BinaryFormat/ELF.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCELFObjectWriter.h"
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#include "llvm/MC/MCFixup.h"
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#include "llvm/MC/MCObjectWriter.h"
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#include "llvm/MC/MCValue.h"
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#include "llvm/Support/ErrorHandling.h"
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using namespace llvm;
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namespace {
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class LoongArchELFObjectWriter : public MCELFObjectTargetWriter {
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public:
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LoongArchELFObjectWriter(uint8_t OSABI, bool Is64Bit);
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~LoongArchELFObjectWriter() override;
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bool needsRelocateWithSymbol(const MCValue &, unsigned Type) const override {
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return true;
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}
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protected:
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unsigned getRelocType(const MCFixup &, const MCValue &,
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bool IsPCRel) const override;
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};
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} // end namespace
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LoongArchELFObjectWriter::LoongArchELFObjectWriter(uint8_t OSABI, bool Is64Bit)
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: MCELFObjectTargetWriter(Is64Bit, OSABI, ELF::EM_LOONGARCH,
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/*HasRelocationAddend=*/true) {}
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LoongArchELFObjectWriter::~LoongArchELFObjectWriter() {}
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unsigned LoongArchELFObjectWriter::getRelocType(const MCFixup &Fixup,
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const MCValue &Target,
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bool IsPCRel) const {
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switch (Target.getSpecifier()) {
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case ELF::R_LARCH_TLS_LE_HI20:
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case ELF::R_LARCH_TLS_IE_PC_HI20:
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case ELF::R_LARCH_TLS_IE_HI20:
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case ELF::R_LARCH_TLS_LD_PC_HI20:
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case ELF::R_LARCH_TLS_LD_HI20:
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case ELF::R_LARCH_TLS_GD_PC_HI20:
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case ELF::R_LARCH_TLS_GD_HI20:
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case ELF::R_LARCH_TLS_DESC_PC_HI20:
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case ELF::R_LARCH_TLS_DESC_HI20:
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case ELF::R_LARCH_TLS_LE_HI20_R:
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case ELF::R_LARCH_TLS_LD_PCREL20_S2:
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case ELF::R_LARCH_TLS_GD_PCREL20_S2:
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case ELF::R_LARCH_TLS_DESC_PCREL20_S2:
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if (auto *SA = const_cast<MCSymbol *>(Target.getAddSym()))
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static_cast<MCSymbolELF *>(SA)->setType(ELF::STT_TLS);
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break;
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default:
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break;
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}
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auto Kind = Fixup.getKind();
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if (mc::isRelocation(Fixup.getKind()))
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return Kind;
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switch (Kind) {
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default:
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reportError(Fixup.getLoc(), "Unsupported relocation type");
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return ELF::R_LARCH_NONE;
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case FK_Data_1:
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reportError(Fixup.getLoc(), "1-byte data relocations not supported");
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return ELF::R_LARCH_NONE;
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case FK_Data_2:
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reportError(Fixup.getLoc(), "2-byte data relocations not supported");
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return ELF::R_LARCH_NONE;
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case FK_Data_4:
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return IsPCRel ? ELF::R_LARCH_32_PCREL : ELF::R_LARCH_32;
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case FK_Data_8:
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return IsPCRel ? ELF::R_LARCH_64_PCREL : ELF::R_LARCH_64;
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case LoongArch::fixup_loongarch_b16:
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return ELF::R_LARCH_B16;
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case LoongArch::fixup_loongarch_b21:
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return ELF::R_LARCH_B21;
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case LoongArch::fixup_loongarch_b26:
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return ELF::R_LARCH_B26;
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case LoongArch::fixup_loongarch_abs_hi20:
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return ELF::R_LARCH_ABS_HI20;
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case LoongArch::fixup_loongarch_abs_lo12:
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return ELF::R_LARCH_ABS_LO12;
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case LoongArch::fixup_loongarch_abs64_lo20:
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return ELF::R_LARCH_ABS64_LO20;
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case LoongArch::fixup_loongarch_abs64_hi12:
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return ELF::R_LARCH_ABS64_HI12;
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}
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}
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std::unique_ptr<MCObjectTargetWriter>
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llvm::createLoongArchELFObjectWriter(uint8_t OSABI, bool Is64Bit) {
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return std::make_unique<LoongArchELFObjectWriter>(OSABI, Is64Bit);
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}
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