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); 39 40 /// Callback used to implement the .inst directive. 41 virtual void emitInst(uint32_t Inst); 42 43 /// Callback used to implement the .variant_pcs directive. 44 virtual void emitDirectiveVariantPCS(MCSymbol *Symbol) {}; 45 46 virtual void emitARM64WinCFIAllocStack(unsigned Size) {} 47 virtual void emitARM64WinCFISaveR19R20X(int Offset) {} 48 virtual void emitARM64WinCFISaveFPLR(int Offset) {} 49 virtual void emitARM64WinCFISaveFPLRX(int Offset) {} 50 virtual void emitARM64WinCFISaveReg(unsigned Reg, int Offset) {} 51 virtual void emitARM64WinCFISaveRegX(unsigned Reg, int Offset) {} 52 virtual void emitARM64WinCFISaveRegP(unsigned Reg, int Offset) {} 53 virtual void emitARM64WinCFISaveRegPX(unsigned Reg, int Offset) {} 54 virtual void emitARM64WinCFISaveLRPair(unsigned Reg, int Offset) {} 55 virtual void emitARM64WinCFISaveFReg(unsigned Reg, int Offset) {} 56 virtual void emitARM64WinCFISaveFRegX(unsigned Reg, int Offset) {} 57 virtual void emitARM64WinCFISaveFRegP(unsigned Reg, int Offset) {} 58 virtual void emitARM64WinCFISaveFRegPX(unsigned Reg, int Offset) {} 59 virtual void emitARM64WinCFISetFP() {} 60 virtual void emitARM64WinCFIAddFP(unsigned Size) {} 61 virtual void emitARM64WinCFINop() {} 62 virtual void emitARM64WinCFISaveNext() {} 63 virtual void emitARM64WinCFIPrologEnd() {} 64 virtual void emitARM64WinCFIEpilogStart() {} 65 virtual void emitARM64WinCFIEpilogEnd() {} 66 virtual void emitARM64WinCFITrapFrame() {} 67 virtual void emitARM64WinCFIMachineFrame() {} 68 virtual void emitARM64WinCFIContext() {} 69 virtual void emitARM64WinCFIClearUnwoundToCall() {} 70 virtual void emitARM64WinCFIPACSignLR() {} 71 virtual void emitARM64WinCFISaveAnyRegI(unsigned Reg, int Offset) {} 72 virtual void emitARM64WinCFISaveAnyRegIP(unsigned Reg, int Offset) {} 73 virtual void emitARM64WinCFISaveAnyRegD(unsigned Reg, int Offset) {} 74 virtual void emitARM64WinCFISaveAnyRegDP(unsigned Reg, int Offset) {} 75 virtual void emitARM64WinCFISaveAnyRegQ(unsigned Reg, int Offset) {} 76 virtual void emitARM64WinCFISaveAnyRegQP(unsigned Reg, int Offset) {} 77 virtual void emitARM64WinCFISaveAnyRegIX(unsigned Reg, int Offset) {} 78 virtual void emitARM64WinCFISaveAnyRegIPX(unsigned Reg, int Offset) {} 79 virtual void emitARM64WinCFISaveAnyRegDX(unsigned Reg, int Offset) {} 80 virtual void emitARM64WinCFISaveAnyRegDPX(unsigned Reg, int Offset) {} 81 virtual void emitARM64WinCFISaveAnyRegQX(unsigned Reg, int Offset) {} 82 virtual void emitARM64WinCFISaveAnyRegQPX(unsigned Reg, int Offset) {} 83 84 private: 85 std::unique_ptr<AssemblerConstantPools> ConstantPools; 86 }; 87 88 class AArch64TargetELFStreamer : public AArch64TargetStreamer { 89 private: 90 AArch64ELFStreamer &getStreamer(); 91 92 void emitInst(uint32_t Inst) override; 93 void emitDirectiveVariantPCS(MCSymbol *Symbol) override; 94 95 public: 96 AArch64TargetELFStreamer(MCStreamer &S) : AArch64TargetStreamer(S) {} 97 }; 98 99 class AArch64TargetWinCOFFStreamer : public llvm::AArch64TargetStreamer { 100 private: 101 // True if we are processing SEH directives in an epilogue. 102 bool InEpilogCFI = false; 103 104 // Symbol of the current epilog for which we are processing SEH directives. 105 MCSymbol *CurrentEpilog = nullptr; 106 public: 107 AArch64TargetWinCOFFStreamer(llvm::MCStreamer &S) 108 : AArch64TargetStreamer(S) {} 109 110 // The unwind codes on ARM64 Windows are documented at 111 // https://docs.microsoft.com/en-us/cpp/build/arm64-exception-handling 112 void emitARM64WinCFIAllocStack(unsigned Size) override; 113 void emitARM64WinCFISaveR19R20X(int Offset) override; 114 void emitARM64WinCFISaveFPLR(int Offset) override; 115 void emitARM64WinCFISaveFPLRX(int Offset) override; 116 void emitARM64WinCFISaveReg(unsigned Reg, int Offset) override; 117 void emitARM64WinCFISaveRegX(unsigned Reg, int Offset) override; 118 void emitARM64WinCFISaveRegP(unsigned Reg, int Offset) override; 119 void emitARM64WinCFISaveRegPX(unsigned Reg, int Offset) override; 120 void emitARM64WinCFISaveLRPair(unsigned Reg, int Offset) override; 121 void emitARM64WinCFISaveFReg(unsigned Reg, int Offset) override; 122 void emitARM64WinCFISaveFRegX(unsigned Reg, int Offset) override; 123 void emitARM64WinCFISaveFRegP(unsigned Reg, int Offset) override; 124 void emitARM64WinCFISaveFRegPX(unsigned Reg, int Offset) override; 125 void emitARM64WinCFISetFP() override; 126 void emitARM64WinCFIAddFP(unsigned Size) override; 127 void emitARM64WinCFINop() override; 128 void emitARM64WinCFISaveNext() override; 129 void emitARM64WinCFIPrologEnd() override; 130 void emitARM64WinCFIEpilogStart() override; 131 void emitARM64WinCFIEpilogEnd() override; 132 void emitARM64WinCFITrapFrame() override; 133 void emitARM64WinCFIMachineFrame() override; 134 void emitARM64WinCFIContext() override; 135 void emitARM64WinCFIClearUnwoundToCall() override; 136 void emitARM64WinCFIPACSignLR() override; 137 void emitARM64WinCFISaveAnyRegI(unsigned Reg, int Offset) override; 138 void emitARM64WinCFISaveAnyRegIP(unsigned Reg, int Offset) override; 139 void emitARM64WinCFISaveAnyRegD(unsigned Reg, int Offset) override; 140 void emitARM64WinCFISaveAnyRegDP(unsigned Reg, int Offset) override; 141 void emitARM64WinCFISaveAnyRegQ(unsigned Reg, int Offset) override; 142 void emitARM64WinCFISaveAnyRegQP(unsigned Reg, int Offset) override; 143 void emitARM64WinCFISaveAnyRegIX(unsigned Reg, int Offset) override; 144 void emitARM64WinCFISaveAnyRegIPX(unsigned Reg, int Offset) override; 145 void emitARM64WinCFISaveAnyRegDX(unsigned Reg, int Offset) override; 146 void emitARM64WinCFISaveAnyRegDPX(unsigned Reg, int Offset) override; 147 void emitARM64WinCFISaveAnyRegQX(unsigned Reg, int Offset) override; 148 void emitARM64WinCFISaveAnyRegQPX(unsigned Reg, int Offset) override; 149 150 private: 151 void emitARM64WinUnwindCode(unsigned UnwindCode, int Reg, int Offset); 152 }; 153 154 MCTargetStreamer * 155 createAArch64ObjectTargetStreamer(MCStreamer &S, const MCSubtargetInfo &STI); 156 157 MCTargetStreamer *createAArch64NullTargetStreamer(MCStreamer &S); 158 159 } // end namespace llvm 160 161 #endif 162