1 //===-- AArch64TargetStreamer.h - AArch64 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_AARCH64_MCTARGETDESC_AARCH64TARGETSTREAMER_H 10 #define LLVM_LIB_TARGET_AARCH64_MCTARGETDESC_AARCH64TARGETSTREAMER_H 11 12 #include "llvm/MC/MCStreamer.h" 13 14 namespace { 15 class AArch64ELFStreamer; 16 } 17 18 namespace llvm { 19 20 class AArch64TargetStreamer : public MCTargetStreamer { 21 public: 22 AArch64TargetStreamer(MCStreamer &S); 23 ~AArch64TargetStreamer() override; 24 25 void finish() override; 26 void emitConstantPools() override; 27 28 /// Callback used to implement the ldr= pseudo. 29 /// Add a new entry to the constant pool for the current section and return an 30 /// MCExpr that can be used to refer to the constant pool location. 31 const MCExpr *addConstantPoolEntry(const MCExpr *, unsigned Size, SMLoc Loc); 32 33 /// Callback used to implement the .ltorg directive. 34 /// Emit contents of constant pool for the current section. 35 void emitCurrentConstantPool(); 36 37 /// Callback used to implement the .note.gnu.property section. 38 void emitNoteSection(unsigned Flags, uint64_t PAuthABIPlatform = -1, 39 uint64_t PAuthABIVersion = -1); 40 41 /// Callback used to implement the .inst directive. 42 virtual void emitInst(uint32_t Inst); 43 44 /// Callback used to implement the .variant_pcs directive. 45 virtual void emitDirectiveVariantPCS(MCSymbol *Symbol) {}; 46 47 virtual void emitARM64WinCFIAllocStack(unsigned Size) {} 48 virtual void emitARM64WinCFISaveR19R20X(int Offset) {} 49 virtual void emitARM64WinCFISaveFPLR(int Offset) {} 50 virtual void emitARM64WinCFISaveFPLRX(int Offset) {} 51 virtual void emitARM64WinCFISaveReg(unsigned Reg, int Offset) {} 52 virtual void emitARM64WinCFISaveRegX(unsigned Reg, int Offset) {} 53 virtual void emitARM64WinCFISaveRegP(unsigned Reg, int Offset) {} 54 virtual void emitARM64WinCFISaveRegPX(unsigned Reg, int Offset) {} 55 virtual void emitARM64WinCFISaveLRPair(unsigned Reg, int Offset) {} 56 virtual void emitARM64WinCFISaveFReg(unsigned Reg, int Offset) {} 57 virtual void emitARM64WinCFISaveFRegX(unsigned Reg, int Offset) {} 58 virtual void emitARM64WinCFISaveFRegP(unsigned Reg, int Offset) {} 59 virtual void emitARM64WinCFISaveFRegPX(unsigned Reg, int Offset) {} 60 virtual void emitARM64WinCFISetFP() {} 61 virtual void emitARM64WinCFIAddFP(unsigned Size) {} 62 virtual void emitARM64WinCFINop() {} 63 virtual void emitARM64WinCFISaveNext() {} 64 virtual void emitARM64WinCFIPrologEnd() {} 65 virtual void emitARM64WinCFIEpilogStart() {} 66 virtual void emitARM64WinCFIEpilogEnd() {} 67 virtual void emitARM64WinCFITrapFrame() {} 68 virtual void emitARM64WinCFIMachineFrame() {} 69 virtual void emitARM64WinCFIContext() {} 70 virtual void emitARM64WinCFIECContext() {} 71 virtual void emitARM64WinCFIClearUnwoundToCall() {} 72 virtual void emitARM64WinCFIPACSignLR() {} 73 virtual void emitARM64WinCFISaveAnyRegI(unsigned Reg, int Offset) {} 74 virtual void emitARM64WinCFISaveAnyRegIP(unsigned Reg, int Offset) {} 75 virtual void emitARM64WinCFISaveAnyRegD(unsigned Reg, int Offset) {} 76 virtual void emitARM64WinCFISaveAnyRegDP(unsigned Reg, int Offset) {} 77 virtual void emitARM64WinCFISaveAnyRegQ(unsigned Reg, int Offset) {} 78 virtual void emitARM64WinCFISaveAnyRegQP(unsigned Reg, int Offset) {} 79 virtual void emitARM64WinCFISaveAnyRegIX(unsigned Reg, int Offset) {} 80 virtual void emitARM64WinCFISaveAnyRegIPX(unsigned Reg, int Offset) {} 81 virtual void emitARM64WinCFISaveAnyRegDX(unsigned Reg, int Offset) {} 82 virtual void emitARM64WinCFISaveAnyRegDPX(unsigned Reg, int Offset) {} 83 virtual void emitARM64WinCFISaveAnyRegQX(unsigned Reg, int Offset) {} 84 virtual void emitARM64WinCFISaveAnyRegQPX(unsigned Reg, int Offset) {} 85 86 private: 87 std::unique_ptr<AssemblerConstantPools> ConstantPools; 88 }; 89 90 class AArch64TargetELFStreamer : public AArch64TargetStreamer { 91 private: 92 AArch64ELFStreamer &getStreamer(); 93 94 void emitInst(uint32_t Inst) override; 95 void emitDirectiveVariantPCS(MCSymbol *Symbol) override; 96 void finish() override; 97 98 public: 99 AArch64TargetELFStreamer(MCStreamer &S) : AArch64TargetStreamer(S) {} 100 }; 101 102 class AArch64TargetWinCOFFStreamer : public llvm::AArch64TargetStreamer { 103 private: 104 // True if we are processing SEH directives in an epilogue. 105 bool InEpilogCFI = false; 106 107 // Symbol of the current epilog for which we are processing SEH directives. 108 MCSymbol *CurrentEpilog = nullptr; 109 public: 110 AArch64TargetWinCOFFStreamer(llvm::MCStreamer &S) 111 : AArch64TargetStreamer(S) {} 112 113 // The unwind codes on ARM64 Windows are documented at 114 // https://docs.microsoft.com/en-us/cpp/build/arm64-exception-handling 115 void emitARM64WinCFIAllocStack(unsigned Size) override; 116 void emitARM64WinCFISaveR19R20X(int Offset) override; 117 void emitARM64WinCFISaveFPLR(int Offset) override; 118 void emitARM64WinCFISaveFPLRX(int Offset) override; 119 void emitARM64WinCFISaveReg(unsigned Reg, int Offset) override; 120 void emitARM64WinCFISaveRegX(unsigned Reg, int Offset) override; 121 void emitARM64WinCFISaveRegP(unsigned Reg, int Offset) override; 122 void emitARM64WinCFISaveRegPX(unsigned Reg, int Offset) override; 123 void emitARM64WinCFISaveLRPair(unsigned Reg, int Offset) override; 124 void emitARM64WinCFISaveFReg(unsigned Reg, int Offset) override; 125 void emitARM64WinCFISaveFRegX(unsigned Reg, int Offset) override; 126 void emitARM64WinCFISaveFRegP(unsigned Reg, int Offset) override; 127 void emitARM64WinCFISaveFRegPX(unsigned Reg, int Offset) override; 128 void emitARM64WinCFISetFP() override; 129 void emitARM64WinCFIAddFP(unsigned Size) override; 130 void emitARM64WinCFINop() override; 131 void emitARM64WinCFISaveNext() override; 132 void emitARM64WinCFIPrologEnd() override; 133 void emitARM64WinCFIEpilogStart() override; 134 void emitARM64WinCFIEpilogEnd() override; 135 void emitARM64WinCFITrapFrame() override; 136 void emitARM64WinCFIMachineFrame() override; 137 void emitARM64WinCFIContext() override; 138 void emitARM64WinCFIECContext() override; 139 void emitARM64WinCFIClearUnwoundToCall() override; 140 void emitARM64WinCFIPACSignLR() override; 141 void emitARM64WinCFISaveAnyRegI(unsigned Reg, int Offset) override; 142 void emitARM64WinCFISaveAnyRegIP(unsigned Reg, int Offset) override; 143 void emitARM64WinCFISaveAnyRegD(unsigned Reg, int Offset) override; 144 void emitARM64WinCFISaveAnyRegDP(unsigned Reg, int Offset) override; 145 void emitARM64WinCFISaveAnyRegQ(unsigned Reg, int Offset) override; 146 void emitARM64WinCFISaveAnyRegQP(unsigned Reg, int Offset) override; 147 void emitARM64WinCFISaveAnyRegIX(unsigned Reg, int Offset) override; 148 void emitARM64WinCFISaveAnyRegIPX(unsigned Reg, int Offset) override; 149 void emitARM64WinCFISaveAnyRegDX(unsigned Reg, int Offset) override; 150 void emitARM64WinCFISaveAnyRegDPX(unsigned Reg, int Offset) override; 151 void emitARM64WinCFISaveAnyRegQX(unsigned Reg, int Offset) override; 152 void emitARM64WinCFISaveAnyRegQPX(unsigned Reg, int Offset) override; 153 154 private: 155 void emitARM64WinUnwindCode(unsigned UnwindCode, int Reg, int Offset); 156 }; 157 158 MCTargetStreamer * 159 createAArch64ObjectTargetStreamer(MCStreamer &S, const MCSubtargetInfo &STI); 160 161 MCTargetStreamer *createAArch64NullTargetStreamer(MCStreamer &S); 162 163 } // end namespace llvm 164 165 #endif 166