1 //===- MCWin64EH.h - Machine Code Win64 EH support --------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file contains declarations to support the Win64 Exception Handling 11 // scheme in MC. 12 // 13 //===----------------------------------------------------------------------===// 14 15 #ifndef LLVM_MC_MCWIN64EH_H 16 #define LLVM_MC_MCWIN64EH_H 17 18 #include "llvm/MC/MCWinEH.h" 19 #include "llvm/Support/Win64EH.h" 20 21 namespace llvm { 22 class MCStreamer; 23 class MCSymbol; 24 25 namespace Win64EH { 26 struct Instruction { 27 static WinEH::Instruction PushNonVol(MCSymbol *L, unsigned Reg) { 28 return WinEH::Instruction(Win64EH::UOP_PushNonVol, L, Reg, -1); 29 } 30 static WinEH::Instruction Alloc(MCSymbol *L, unsigned Size) { 31 return WinEH::Instruction(Size > 128 ? UOP_AllocLarge : UOP_AllocSmall, L, 32 -1, Size); 33 } 34 static WinEH::Instruction PushMachFrame(MCSymbol *L, bool Code) { 35 return WinEH::Instruction(UOP_PushMachFrame, L, -1, Code ? 1 : 0); 36 } 37 static WinEH::Instruction SaveNonVol(MCSymbol *L, unsigned Reg, 38 unsigned Offset) { 39 return WinEH::Instruction(Offset > 512 * 1024 - 8 ? UOP_SaveNonVolBig 40 : UOP_SaveNonVol, 41 L, Reg, Offset); 42 } 43 static WinEH::Instruction SaveXMM(MCSymbol *L, unsigned Reg, 44 unsigned Offset) { 45 return WinEH::Instruction(Offset > 512 * 1024 - 8 ? UOP_SaveXMM128Big 46 : UOP_SaveXMM128, 47 L, Reg, Offset); 48 } 49 static WinEH::Instruction SetFPReg(MCSymbol *L, unsigned Reg, unsigned Off) { 50 return WinEH::Instruction(UOP_SetFPReg, L, Reg, Off); 51 } 52 }; 53 54 class UnwindEmitter : public WinEH::UnwindEmitter { 55 public: 56 void Emit(MCStreamer &Streamer) const override; 57 void EmitUnwindInfo(MCStreamer &Streamer, WinEH::FrameInfo *FI) const override; 58 }; 59 } 60 } // end namespace llvm 61 62 #endif 63
