2946cd7010
to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
127 lines
4.1 KiB
C++
127 lines
4.1 KiB
C++
//= AArch64WinCOFFObjectWriter.cpp - AArch64 Windows COFF Object 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/AArch64FixupKinds.h"
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#include "MCTargetDesc/AArch64MCExpr.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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const MCExpr *Expr = Fixup.getValue();
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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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if (const AArch64MCExpr *A64E = dyn_cast<AArch64MCExpr>(Expr)) {
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AArch64MCExpr::VariantKind RefKind = A64E->getKind();
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if (RefKind == AArch64MCExpr::VK_SECREL_LO12)
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return COFF::IMAGE_REL_ARM64_SECREL_LOW12A;
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if (RefKind == AArch64MCExpr::VK_SECREL_HI12)
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return COFF::IMAGE_REL_ARM64_SECREL_HIGH12A;
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}
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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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if (const AArch64MCExpr *A64E = dyn_cast<AArch64MCExpr>(Expr)) {
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AArch64MCExpr::VariantKind RefKind = A64E->getKind();
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if (RefKind == AArch64MCExpr::VK_SECREL_LO12)
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return COFF::IMAGE_REL_ARM64_SECREL_LOW12L;
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}
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return COFF::IMAGE_REL_ARM64_PAGEOFFSET_12L;
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case AArch64::fixup_aarch64_pcrel_adr_imm21:
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return COFF::IMAGE_REL_ARM64_REL21;
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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_branch14:
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return COFF::IMAGE_REL_ARM64_BRANCH14;
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case AArch64::fixup_aarch64_pcrel_branch19:
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return COFF::IMAGE_REL_ARM64_BRANCH19;
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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<MCObjectTargetWriter> createAArch64WinCOFFObjectWriter() {
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return llvm::make_unique<AArch64WinCOFFObjectWriter>();
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}
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} // end namespace llvm
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