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9af311f3de
Add the Lanai backend to lib/Target. General Lanai backend discussion on llvm-dev thread "[RFC] Lanai backend" (http://lists.llvm.org/pipermail/llvm-dev/2016-February/095118.html). Differential Revision: http://reviews.llvm.org/D17011 llvm-svn: 264578
96 lines
2.8 KiB
C++
96 lines
2.8 KiB
C++
//===-- LanaiELFObjectWriter.cpp - Lanai 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/LanaiBaseInfo.h"
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#include "MCTargetDesc/LanaiFixupKinds.h"
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#include "MCTargetDesc/LanaiMCTargetDesc.h"
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#include "llvm/MC/MCELFObjectWriter.h"
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#include "llvm/MC/MCSymbol.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace llvm;
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namespace {
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class LanaiELFObjectWriter : public MCELFObjectTargetWriter {
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public:
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explicit LanaiELFObjectWriter(uint8_t OSABI);
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~LanaiELFObjectWriter() 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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bool needsRelocateWithSymbol(const MCSymbol &SD,
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unsigned Type) const override;
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};
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} // namespace
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LanaiELFObjectWriter::LanaiELFObjectWriter(uint8_t OSABI)
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: MCELFObjectTargetWriter(/*Is64Bit=*/false, OSABI, ELF::EM_LANAI,
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/*HasRelocationAddend=*/true) {}
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LanaiELFObjectWriter::~LanaiELFObjectWriter() {}
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unsigned LanaiELFObjectWriter::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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unsigned Type;
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unsigned Kind = static_cast<unsigned>(Fixup.getKind());
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switch (Kind) {
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case Lanai::FIXUP_LANAI_21:
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Type = ELF::R_LANAI_21;
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break;
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case Lanai::FIXUP_LANAI_21_F:
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Type = ELF::R_LANAI_21_F;
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break;
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case Lanai::FIXUP_LANAI_25:
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Type = ELF::R_LANAI_25;
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break;
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case Lanai::FIXUP_LANAI_32:
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case FK_Data_4:
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Type = ELF::R_LANAI_32;
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break;
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case Lanai::FIXUP_LANAI_HI16:
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Type = ELF::R_LANAI_HI16;
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break;
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case Lanai::FIXUP_LANAI_LO16:
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Type = ELF::R_LANAI_LO16;
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break;
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case Lanai::FIXUP_LANAI_NONE:
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Type = ELF::R_LANAI_NONE;
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break;
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default:
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llvm_unreachable("Invalid fixup kind!");
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}
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return Type;
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}
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bool LanaiELFObjectWriter::needsRelocateWithSymbol(const MCSymbol &SD,
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unsigned Type) const {
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switch (Type) {
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case ELF::R_LANAI_21:
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case ELF::R_LANAI_21_F:
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case ELF::R_LANAI_25:
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case ELF::R_LANAI_32:
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case ELF::R_LANAI_HI16:
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return true;
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default:
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return false;
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}
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}
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MCObjectWriter *llvm::createLanaiELFObjectWriter(raw_pwrite_stream &OS,
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uint8_t OSABI) {
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MCELFObjectTargetWriter *MOTW = new LanaiELFObjectWriter(OSABI);
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return createELFObjectWriter(MOTW, OS, /*IsLittleEndian=*/false);
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}
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