99 lines
3.2 KiB
C++
99 lines
3.2 KiB
C++
//===-- ARMWinCOFFObjectWriter.cpp - ARM 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/ARMFixupKinds.h"
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#include "llvm/ADT/Twine.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/MCValue.h"
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#include "llvm/MC/MCWinCOFFObjectWriter.h"
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#include "llvm/Support/COFF.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 ARMWinCOFFObjectWriter : public MCWinCOFFObjectTargetWriter {
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public:
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ARMWinCOFFObjectWriter(bool Is64Bit)
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: MCWinCOFFObjectTargetWriter(COFF::IMAGE_FILE_MACHINE_ARMNT) {
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assert(!Is64Bit && "AArch64 support not yet implemented");
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}
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~ARMWinCOFFObjectWriter() override = default;
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unsigned getRelocType(const MCValue &Target, const MCFixup &Fixup,
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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 ARMWinCOFFObjectWriter::getRelocType(const MCValue &Target,
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const MCFixup &Fixup,
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bool IsCrossSection,
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const MCAsmBackend &MAB) const {
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assert(getMachine() == COFF::IMAGE_FILE_MACHINE_ARMNT &&
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"AArch64 support not yet implemented");
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MCSymbolRefExpr::VariantKind Modifier =
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Target.isAbsolute() ? MCSymbolRefExpr::VK_None : 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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case MCSymbolRefExpr::VK_COFF_IMGREL32:
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return COFF::IMAGE_REL_ARM_ADDR32NB;
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case MCSymbolRefExpr::VK_SECREL:
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return COFF::IMAGE_REL_ARM_SECREL;
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default:
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return COFF::IMAGE_REL_ARM_ADDR32;
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}
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case FK_SecRel_2:
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return COFF::IMAGE_REL_ARM_SECTION;
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case FK_SecRel_4:
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return COFF::IMAGE_REL_ARM_SECREL;
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case ARM::fixup_t2_condbranch:
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return COFF::IMAGE_REL_ARM_BRANCH20T;
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case ARM::fixup_t2_uncondbranch:
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return COFF::IMAGE_REL_ARM_BRANCH24T;
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case ARM::fixup_arm_thumb_bl:
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case ARM::fixup_arm_thumb_blx:
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return COFF::IMAGE_REL_ARM_BLX23T;
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case ARM::fixup_t2_movw_lo16:
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case ARM::fixup_t2_movt_hi16:
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return COFF::IMAGE_REL_ARM_MOV32T;
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}
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}
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bool ARMWinCOFFObjectWriter::recordRelocation(const MCFixup &Fixup) const {
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return static_cast<unsigned>(Fixup.getKind()) != ARM::fixup_t2_movt_hi16;
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}
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namespace llvm {
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MCObjectWriter *createARMWinCOFFObjectWriter(raw_pwrite_stream &OS,
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bool Is64Bit) {
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MCWinCOFFObjectTargetWriter *MOTW = new ARMWinCOFFObjectWriter(Is64Bit);
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return createWinCOFFObjectWriter(MOTW, OS);
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}
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} // end namespace llvm
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