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 #include <vector> 21 22 namespace llvm { 23 class MCStreamer; 24 class MCSymbol; 25 26 namespace Win64EH { 27 struct Instruction { 28 static WinEH::Instruction PushNonVol(MCSymbol *L, unsigned Reg) { 29 return WinEH::Instruction(Win64EH::UOP_PushNonVol, L, Reg, -1); 30 } 31 static WinEH::Instruction Alloc(MCSymbol *L, unsigned Size) { 32 return WinEH::Instruction(Size > 128 ? UOP_AllocLarge : UOP_AllocSmall, L, 33 -1, Size); 34 } 35 static WinEH::Instruction PushMachFrame(MCSymbol *L, bool Code) { 36 return WinEH::Instruction(UOP_PushMachFrame, L, -1, Code ? 1 : 0); 37 } 38 static WinEH::Instruction SaveNonVol(MCSymbol *L, unsigned Reg, 39 unsigned Offset) { 40 return WinEH::Instruction(Offset > 512 * 1024 - 8 ? UOP_SaveNonVolBig 41 : UOP_SaveNonVol, 42 L, Reg, Offset); 43 } 44 static WinEH::Instruction SaveXMM(MCSymbol *L, unsigned Reg, 45 unsigned Offset) { 46 return WinEH::Instruction(Offset > 512 * 1024 - 8 ? UOP_SaveXMM128Big 47 : UOP_SaveXMM128, 48 L, Reg, Offset); 49 } 50 static WinEH::Instruction SetFPReg(MCSymbol *L, unsigned Reg, unsigned Off) { 51 return WinEH::Instruction(UOP_SetFPReg, L, Reg, Off); 52 } 53 }; 54 55 class UnwindEmitter : public WinEH::UnwindEmitter { 56 public: 57 void Emit(MCStreamer &Streamer) const override; 58 void EmitUnwindInfo(MCStreamer &Streamer, WinEH::FrameInfo *FI) const override; 59 }; 60 } 61 } // end namespace llvm 62 63 #endif 64
