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
99 lines
3.2 KiB
C++
99 lines
3.2 KiB
C++
//===-- ARMWinCOFFObjectWriter.cpp - ARM Windows COFF Object Writer -- C++ -==//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "MCTargetDesc/ARMFixupKinds.h"
|
|
#include "llvm/ADT/Twine.h"
|
|
#include "llvm/BinaryFormat/COFF.h"
|
|
#include "llvm/MC/MCAsmBackend.h"
|
|
#include "llvm/MC/MCExpr.h"
|
|
#include "llvm/MC/MCFixup.h"
|
|
#include "llvm/MC/MCFixupKindInfo.h"
|
|
#include "llvm/MC/MCObjectWriter.h"
|
|
#include "llvm/MC/MCValue.h"
|
|
#include "llvm/MC/MCWinCOFFObjectWriter.h"
|
|
#include "llvm/Support/ErrorHandling.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
#include <cassert>
|
|
|
|
using namespace llvm;
|
|
|
|
namespace {
|
|
|
|
class ARMWinCOFFObjectWriter : public MCWinCOFFObjectTargetWriter {
|
|
public:
|
|
ARMWinCOFFObjectWriter(bool Is64Bit)
|
|
: MCWinCOFFObjectTargetWriter(COFF::IMAGE_FILE_MACHINE_ARMNT) {
|
|
assert(!Is64Bit && "AArch64 support not yet implemented");
|
|
}
|
|
|
|
~ARMWinCOFFObjectWriter() override = default;
|
|
|
|
unsigned getRelocType(MCContext &Ctx, const MCValue &Target,
|
|
const MCFixup &Fixup, bool IsCrossSection,
|
|
const MCAsmBackend &MAB) const override;
|
|
|
|
bool recordRelocation(const MCFixup &) const override;
|
|
};
|
|
|
|
} // end anonymous namespace
|
|
|
|
unsigned ARMWinCOFFObjectWriter::getRelocType(MCContext &Ctx,
|
|
const MCValue &Target,
|
|
const MCFixup &Fixup,
|
|
bool IsCrossSection,
|
|
const MCAsmBackend &MAB) const {
|
|
assert(getMachine() == COFF::IMAGE_FILE_MACHINE_ARMNT &&
|
|
"AArch64 support not yet implemented");
|
|
|
|
MCSymbolRefExpr::VariantKind Modifier =
|
|
Target.isAbsolute() ? MCSymbolRefExpr::VK_None : Target.getSymA()->getKind();
|
|
|
|
switch (static_cast<unsigned>(Fixup.getKind())) {
|
|
default: {
|
|
const MCFixupKindInfo &Info = MAB.getFixupKindInfo(Fixup.getKind());
|
|
report_fatal_error(Twine("unsupported relocation type: ") + Info.Name);
|
|
}
|
|
case FK_Data_4:
|
|
switch (Modifier) {
|
|
case MCSymbolRefExpr::VK_COFF_IMGREL32:
|
|
return COFF::IMAGE_REL_ARM_ADDR32NB;
|
|
case MCSymbolRefExpr::VK_SECREL:
|
|
return COFF::IMAGE_REL_ARM_SECREL;
|
|
default:
|
|
return COFF::IMAGE_REL_ARM_ADDR32;
|
|
}
|
|
case FK_SecRel_2:
|
|
return COFF::IMAGE_REL_ARM_SECTION;
|
|
case FK_SecRel_4:
|
|
return COFF::IMAGE_REL_ARM_SECREL;
|
|
case ARM::fixup_t2_condbranch:
|
|
return COFF::IMAGE_REL_ARM_BRANCH20T;
|
|
case ARM::fixup_t2_uncondbranch:
|
|
case ARM::fixup_arm_thumb_bl:
|
|
return COFF::IMAGE_REL_ARM_BRANCH24T;
|
|
case ARM::fixup_arm_thumb_blx:
|
|
return COFF::IMAGE_REL_ARM_BLX23T;
|
|
case ARM::fixup_t2_movw_lo16:
|
|
case ARM::fixup_t2_movt_hi16:
|
|
return COFF::IMAGE_REL_ARM_MOV32T;
|
|
}
|
|
}
|
|
|
|
bool ARMWinCOFFObjectWriter::recordRelocation(const MCFixup &Fixup) const {
|
|
return static_cast<unsigned>(Fixup.getKind()) != ARM::fixup_t2_movt_hi16;
|
|
}
|
|
|
|
namespace llvm {
|
|
|
|
std::unique_ptr<MCObjectTargetWriter>
|
|
createARMWinCOFFObjectWriter(bool Is64Bit) {
|
|
return llvm::make_unique<ARMWinCOFFObjectWriter>(Is64Bit);
|
|
}
|
|
|
|
} // end namespace llvm
|