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107 lines
3.2 KiB
C++
107 lines
3.2 KiB
C++
//= AArch64WinCOFFObjectWriter.cpp - AArch64 Windows COFF Object Writer C++ =//
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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/AArch64FixupKinds.h"
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#include "llvm/ADT/Twine.h"
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#include "llvm/BinaryFormat/COFF.h"
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#include "llvm/MC/MCAsmBackend.h"
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#include "llvm/MC/MCExpr.h"
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#include "llvm/MC/MCFixup.h"
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#include "llvm/MC/MCFixupKindInfo.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/MC/MCWinCOFFObjectWriter.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/raw_ostream.h"
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#include <cassert>
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using namespace llvm;
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namespace {
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class AArch64WinCOFFObjectWriter : public MCWinCOFFObjectTargetWriter {
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public:
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AArch64WinCOFFObjectWriter()
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: MCWinCOFFObjectTargetWriter(COFF::IMAGE_FILE_MACHINE_ARM64) {}
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~AArch64WinCOFFObjectWriter() override = default;
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unsigned getRelocType(MCContext &Ctx, const MCValue &Target,
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const MCFixup &Fixup, bool IsCrossSection,
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const MCAsmBackend &MAB) const override;
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bool recordRelocation(const MCFixup &) const override;
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};
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} // end anonymous namespace
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unsigned AArch64WinCOFFObjectWriter::getRelocType(
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MCContext &Ctx, const MCValue &Target, const MCFixup &Fixup,
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bool IsCrossSection, const MCAsmBackend &MAB) const {
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auto Modifier = Target.isAbsolute() ? MCSymbolRefExpr::VK_None
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: Target.getSymA()->getKind();
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switch (static_cast<unsigned>(Fixup.getKind())) {
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default: {
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const MCFixupKindInfo &Info = MAB.getFixupKindInfo(Fixup.getKind());
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report_fatal_error(Twine("unsupported relocation type: ") + Info.Name);
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}
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case FK_Data_4:
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switch (Modifier) {
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default:
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return COFF::IMAGE_REL_ARM64_ADDR32;
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case MCSymbolRefExpr::VK_COFF_IMGREL32:
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return COFF::IMAGE_REL_ARM64_ADDR32NB;
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case MCSymbolRefExpr::VK_SECREL:
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return COFF::IMAGE_REL_ARM64_SECREL;
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}
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case FK_Data_8:
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return COFF::IMAGE_REL_ARM64_ADDR64;
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case FK_SecRel_2:
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return COFF::IMAGE_REL_ARM64_SECTION;
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case FK_SecRel_4:
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return COFF::IMAGE_REL_ARM64_SECREL;
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case AArch64::fixup_aarch64_add_imm12:
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return COFF::IMAGE_REL_ARM64_PAGEOFFSET_12A;
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case AArch64::fixup_aarch64_ldst_imm12_scale1:
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case AArch64::fixup_aarch64_ldst_imm12_scale2:
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case AArch64::fixup_aarch64_ldst_imm12_scale4:
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case AArch64::fixup_aarch64_ldst_imm12_scale8:
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case AArch64::fixup_aarch64_ldst_imm12_scale16:
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return COFF::IMAGE_REL_ARM64_PAGEOFFSET_12L;
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case AArch64::fixup_aarch64_pcrel_adrp_imm21:
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return COFF::IMAGE_REL_ARM64_PAGEBASE_REL21;
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case AArch64::fixup_aarch64_pcrel_branch26:
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case AArch64::fixup_aarch64_pcrel_call26:
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return COFF::IMAGE_REL_ARM64_BRANCH26;
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}
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}
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bool AArch64WinCOFFObjectWriter::recordRelocation(const MCFixup &Fixup) const {
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return true;
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}
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namespace llvm {
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std::unique_ptr<MCObjectWriter>
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createAArch64WinCOFFObjectWriter(raw_pwrite_stream &OS) {
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auto MOTW = llvm::make_unique<AArch64WinCOFFObjectWriter>();
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return createWinCOFFObjectWriter(std::move(MOTW), OS);
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}
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} // end namespace llvm
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