forked from OSchip/llvm-project
72 lines
2.3 KiB
C++
72 lines
2.3 KiB
C++
//===-- RISCVELFObjectWriter.cpp - RISCV ELF Writer -----------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "MCTargetDesc/RISCVFixupKinds.h"
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#include "MCTargetDesc/RISCVMCTargetDesc.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/Support/ErrorHandling.h"
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using namespace llvm;
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namespace {
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class RISCVELFObjectWriter : public MCELFObjectTargetWriter {
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public:
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RISCVELFObjectWriter(uint8_t OSABI, bool Is64Bit);
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~RISCVELFObjectWriter() override;
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protected:
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unsigned getRelocType(MCContext &Ctx, const MCValue &Target,
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const MCFixup &Fixup, bool IsPCRel) const override;
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};
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}
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RISCVELFObjectWriter::RISCVELFObjectWriter(uint8_t OSABI, bool Is64Bit)
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: MCELFObjectTargetWriter(Is64Bit, OSABI, ELF::EM_RISCV,
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/*HasRelocationAddend*/ true) {}
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RISCVELFObjectWriter::~RISCVELFObjectWriter() {}
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unsigned RISCVELFObjectWriter::getRelocType(MCContext &Ctx,
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const MCValue &Target,
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const MCFixup &Fixup,
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bool IsPCRel) const {
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// Determine the type of the relocation
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switch ((unsigned)Fixup.getKind()) {
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default:
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llvm_unreachable("invalid fixup kind!");
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case FK_Data_4:
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return ELF::R_RISCV_32;
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case FK_Data_8:
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return ELF::R_RISCV_64;
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case RISCV::fixup_riscv_hi20:
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return ELF::R_RISCV_HI20;
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case RISCV::fixup_riscv_lo12_i:
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return ELF::R_RISCV_LO12_I;
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case RISCV::fixup_riscv_lo12_s:
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return ELF::R_RISCV_LO12_S;
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case RISCV::fixup_riscv_pcrel_hi20:
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return ELF::R_RISCV_PCREL_HI20;
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case RISCV::fixup_riscv_jal:
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return ELF::R_RISCV_JAL;
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case RISCV::fixup_riscv_branch:
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return ELF::R_RISCV_BRANCH;
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}
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}
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std::unique_ptr<MCObjectWriter>
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llvm::createRISCVELFObjectWriter(raw_pwrite_stream &OS, uint8_t OSABI,
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bool Is64Bit) {
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return createELFObjectWriter(
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llvm::make_unique<RISCVELFObjectWriter>(OSABI, Is64Bit), OS,
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/*IsLittleEndian=*/true);
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}
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