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//===-- RISCVELFObjectWriter.cpp - RISCV 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/RISCVFixupKinds.h"
#include "MCTargetDesc/RISCVMCTargetDesc.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 RISCVELFObjectWriter : public MCELFObjectTargetWriter {
public:
RISCVELFObjectWriter(uint8_t OSABI, bool Is64Bit);
~RISCVELFObjectWriter() override;
protected:
unsigned getRelocType(MCContext &Ctx, const MCValue &Target,
const MCFixup &Fixup, bool IsPCRel) const override;
};
}
RISCVELFObjectWriter::RISCVELFObjectWriter(uint8_t OSABI, bool Is64Bit)
: MCELFObjectTargetWriter(Is64Bit, OSABI, ELF::EM_RISCV,
/*HasRelocationAddend*/ true) {}
RISCVELFObjectWriter::~RISCVELFObjectWriter() {}
unsigned RISCVELFObjectWriter::getRelocType(MCContext &Ctx,
const MCValue &Target,
const MCFixup &Fixup,
bool IsPCRel) const {
// Determine the type of the relocation
switch ((unsigned)Fixup.getKind()) {
default:
llvm_unreachable("invalid fixup kind!");
case FK_Data_4:
return ELF::R_RISCV_32;
case FK_Data_8:
return ELF::R_RISCV_64;
case RISCV::fixup_riscv_hi20:
return ELF::R_RISCV_HI20;
case RISCV::fixup_riscv_lo12_i:
return ELF::R_RISCV_LO12_I;
case RISCV::fixup_riscv_lo12_s:
return ELF::R_RISCV_LO12_S;
case RISCV::fixup_riscv_pcrel_hi20:
return ELF::R_RISCV_PCREL_HI20;
case RISCV::fixup_riscv_jal:
return ELF::R_RISCV_JAL;
case RISCV::fixup_riscv_branch:
return ELF::R_RISCV_BRANCH;
case RISCV::fixup_riscv_rvc_jump:
return ELF::R_RISCV_RVC_JUMP;
case RISCV::fixup_riscv_rvc_branch:
return ELF::R_RISCV_RVC_BRANCH;
}
}
std::unique_ptr<MCObjectWriter>
llvm::createRISCVELFObjectWriter(raw_pwrite_stream &OS, uint8_t OSABI,
bool Is64Bit) {
return createELFObjectWriter(
llvm::make_unique<RISCVELFObjectWriter>(OSABI, Is64Bit), OS,
/*IsLittleEndian=*/true);
}
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