1 //===-- RISCVELFStreamer.h - RISC-V ELF Target Streamer ---------*- C++ -*-===// 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 #ifndef LLVM_LIB_TARGET_RISCV_MCTARGETDESC_RISCVELFSTREAMER_H 10 #define LLVM_LIB_TARGET_RISCV_MCTARGETDESC_RISCVELFSTREAMER_H 11 12 #include "RISCVTargetStreamer.h" 13 #include "llvm/MC/MCELFStreamer.h" 14 15 using namespace llvm; 16 17 class RISCVELFStreamer : public MCELFStreamer { 18 void reset() override; 19 void emitDataMappingSymbol(); 20 void emitInstructionsMappingSymbol(); 21 void emitMappingSymbol(StringRef Name); 22 23 enum ElfMappingSymbol { EMS_None, EMS_Instructions, EMS_Data }; 24 25 int64_t MappingSymbolCounter = 0; 26 DenseMap<const MCSection *, ElfMappingSymbol> LastMappingSymbols; 27 ElfMappingSymbol LastEMS = EMS_None; 28 29 public: 30 RISCVELFStreamer(MCContext &C, std::unique_ptr<MCAsmBackend> MAB, 31 std::unique_ptr<MCObjectWriter> MOW, 32 std::unique_ptr<MCCodeEmitter> MCE) 33 : MCELFStreamer(C, std::move(MAB), std::move(MOW), std::move(MCE)) {} 34 35 void changeSection(MCSection *Section, const MCExpr *Subsection) override; 36 void emitInstruction(const MCInst &Inst, const MCSubtargetInfo &STI) override; 37 void emitBytes(StringRef Data) override; 38 void emitFill(const MCExpr &NumBytes, uint64_t FillValue, SMLoc Loc) override; 39 void emitValueImpl(const MCExpr *Value, unsigned Size, SMLoc Loc) override; 40 }; 41 42 namespace llvm { 43 44 class RISCVTargetELFStreamer : public RISCVTargetStreamer { 45 private: 46 StringRef CurrentVendor; 47 48 MCSection *AttributeSection = nullptr; 49 const MCSubtargetInfo &STI; 50 51 void emitAttribute(unsigned Attribute, unsigned Value) override; 52 void emitTextAttribute(unsigned Attribute, StringRef String) override; 53 void emitIntTextAttribute(unsigned Attribute, unsigned IntValue, 54 StringRef StringValue) override; 55 void finishAttributeSection() override; 56 57 void reset() override; 58 59 public: 60 RISCVELFStreamer &getStreamer(); 61 RISCVTargetELFStreamer(MCStreamer &S, const MCSubtargetInfo &STI); 62 63 void emitDirectiveOptionPush() override; 64 void emitDirectiveOptionPop() override; 65 void emitDirectiveOptionPIC() override; 66 void emitDirectiveOptionNoPIC() override; 67 void emitDirectiveOptionRVC() override; 68 void emitDirectiveOptionNoRVC() override; 69 void emitDirectiveOptionRelax() override; 70 void emitDirectiveOptionNoRelax() override; 71 void emitDirectiveVariantCC(MCSymbol &Symbol) override; 72 73 void finish() override; 74 }; 75 76 MCELFStreamer *createRISCVELFStreamer(MCContext &C, 77 std::unique_ptr<MCAsmBackend> MAB, 78 std::unique_ptr<MCObjectWriter> MOW, 79 std::unique_ptr<MCCodeEmitter> MCE, 80 bool RelaxAll); 81 } 82 #endif 83