1 //===-- AVRAsmBackend.h - AVR Asm Backend --------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // \file The AVR assembly backend implementation. 10 // 11 //===----------------------------------------------------------------------===// 12 // 13 14 #ifndef LLVM_AVR_ASM_BACKEND_H 15 #define LLVM_AVR_ASM_BACKEND_H 16 17 #include "MCTargetDesc/AVRFixupKinds.h" 18 19 #include "llvm/MC/MCAsmBackend.h" 20 #include "llvm/TargetParser/Triple.h" 21 22 namespace llvm { 23 24 class MCAssembler; 25 class MCContext; 26 struct MCFixupKindInfo; 27 28 /// Utilities for manipulating generated AVR machine code. 29 class AVRAsmBackend : public MCAsmBackend { 30 public: 31 AVRAsmBackend(Triple::OSType OSType) 32 : MCAsmBackend(llvm::endianness::little), OSType(OSType) {} 33 34 void adjustFixupValue(const MCFixup &Fixup, const MCValue &Target, 35 uint64_t &Value, MCContext *Ctx = nullptr) const; 36 37 std::unique_ptr<MCObjectTargetWriter> 38 createObjectTargetWriter() const override; 39 40 void applyFixup(const MCAssembler &Asm, const MCFixup &Fixup, 41 const MCValue &Target, MutableArrayRef<char> Data, 42 uint64_t Value, bool IsResolved, 43 const MCSubtargetInfo *STI) const override; 44 45 std::optional<MCFixupKind> getFixupKind(StringRef Name) const override; 46 const MCFixupKindInfo &getFixupKindInfo(MCFixupKind Kind) const override; 47 48 unsigned getNumFixupKinds() const override { 49 return AVR::NumTargetFixupKinds; 50 } 51 52 bool writeNopData(raw_ostream &OS, uint64_t Count, 53 const MCSubtargetInfo *STI) const override; 54 55 bool shouldForceRelocation(const MCAssembler &Asm, const MCFixup &Fixup, 56 const MCValue &Target, 57 const MCSubtargetInfo *STI) override; 58 59 private: 60 Triple::OSType OSType; 61 }; 62 63 } // end namespace llvm 64 65 #endif // LLVM_AVR_ASM_BACKEND_H 66