| //===-- ARMAsmBackend.h - ARM Assembler Backend -----------------*- 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_LIB_TARGET_ARM_ARMASMBACKEND_H |
| #define LLVM_LIB_TARGET_ARM_ARMASMBACKEND_H |
| |
| #include "MCTargetDesc/ARMFixupKinds.h" |
| #include "MCTargetDesc/ARMMCTargetDesc.h" |
| #include "llvm/MC/MCAsmBackend.h" |
| #include "llvm/MC/MCSubtargetInfo.h" |
| #include "llvm/Support/TargetRegistry.h" |
| |
| namespace llvm { |
| |
| class ARMAsmBackend : public MCAsmBackend { |
| // The STI from the target triple the MCAsmBackend was instantiated with |
| // note that MCFragments may have a different local STI that should be |
| // used in preference. |
| const MCSubtargetInfo &STI; |
| bool isThumbMode; // Currently emitting Thumb code. |
| public: |
| ARMAsmBackend(const Target &T, const MCSubtargetInfo &STI, |
| support::endianness Endian) |
| : MCAsmBackend(Endian), STI(STI), |
| isThumbMode(STI.getTargetTriple().isThumb()) {} |
| |
| unsigned getNumFixupKinds() const override { |
| return ARM::NumTargetFixupKinds; |
| } |
| |
| // FIXME: this should be calculated per fragment as the STI may be |
| // different. |
| bool hasNOP() const { return STI.getFeatureBits()[ARM::HasV6T2Ops]; } |
| |
| Optional<MCFixupKind> getFixupKind(StringRef Name) const override; |
| |
| const MCFixupKindInfo &getFixupKindInfo(MCFixupKind Kind) const override; |
| |
| bool shouldForceRelocation(const MCAssembler &Asm, const MCFixup &Fixup, |
| const MCValue &Target) override; |
| |
| unsigned adjustFixupValue(const MCAssembler &Asm, const MCFixup &Fixup, |
| const MCValue &Target, uint64_t Value, |
| bool IsResolved, MCContext &Ctx, |
| const MCSubtargetInfo *STI) const; |
| |
| void applyFixup(const MCAssembler &Asm, const MCFixup &Fixup, |
| const MCValue &Target, MutableArrayRef<char> Data, |
| uint64_t Value, bool IsResolved, |
| const MCSubtargetInfo *STI) const override; |
| |
| unsigned getRelaxedOpcode(unsigned Op, const MCSubtargetInfo &STI) const; |
| |
| bool mayNeedRelaxation(const MCInst &Inst, |
| const MCSubtargetInfo &STI) const override; |
| |
| const char *reasonForFixupRelaxation(const MCFixup &Fixup, |
| uint64_t Value) const; |
| |
| bool fixupNeedsRelaxation(const MCFixup &Fixup, uint64_t Value, |
| const MCRelaxableFragment *DF, |
| const MCAsmLayout &Layout) const override; |
| |
| void relaxInstruction(const MCInst &Inst, const MCSubtargetInfo &STI, |
| MCInst &Res) const override; |
| |
| bool writeNopData(raw_ostream &OS, uint64_t Count) const override; |
| |
| void handleAssemblerFlag(MCAssemblerFlag Flag) override; |
| |
| unsigned getPointerSize() const { return 4; } |
| bool isThumb() const { return isThumbMode; } |
| void setIsThumb(bool it) { isThumbMode = it; } |
| }; |
| } // end namespace llvm |
| |
| #endif |