| //===- MCWin64EH.h - Machine Code Win64 EH support --------------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file contains declarations to support the Win64 Exception Handling |
| // scheme in MC. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_MC_MCWIN64EH_H |
| #define LLVM_MC_MCWIN64EH_H |
| |
| #include "llvm/MC/MCWinEH.h" |
| #include "llvm/Support/Win64EH.h" |
| #include <vector> |
| |
| namespace llvm { |
| class StringRef; |
| class MCStreamer; |
| class MCSymbol; |
| |
| namespace Win64EH { |
| struct Instruction { |
| static WinEH::Instruction PushNonVol(MCSymbol *L, unsigned Reg) { |
| return WinEH::Instruction(Win64EH::UOP_PushNonVol, L, Reg, -1); |
| } |
| static WinEH::Instruction Alloc(MCSymbol *L, unsigned Size) { |
| return WinEH::Instruction(Size > 128 ? UOP_AllocLarge : UOP_AllocSmall, L, |
| -1, Size); |
| } |
| static WinEH::Instruction PushMachFrame(MCSymbol *L, bool Code) { |
| return WinEH::Instruction(UOP_PushMachFrame, L, -1, Code ? 1 : 0); |
| } |
| static WinEH::Instruction SaveNonVol(MCSymbol *L, unsigned Reg, |
| unsigned Offset) { |
| return WinEH::Instruction(Offset > 512 * 1024 - 8 ? UOP_SaveNonVolBig |
| : UOP_SaveNonVol, |
| L, Reg, Offset); |
| } |
| static WinEH::Instruction SaveXMM(MCSymbol *L, unsigned Reg, |
| unsigned Offset) { |
| return WinEH::Instruction(Offset > 512 * 1024 - 8 ? UOP_SaveXMM128Big |
| : UOP_SaveXMM128, |
| L, Reg, Offset); |
| } |
| static WinEH::Instruction SetFPReg(MCSymbol *L, unsigned Reg, unsigned Off) { |
| return WinEH::Instruction(UOP_SetFPReg, L, Reg, Off); |
| } |
| }; |
| } |
| |
| struct MCWinFrameInfo { |
| MCWinFrameInfo() |
| : Begin(nullptr), End(nullptr),ExceptionHandler(nullptr), |
| Function(nullptr), PrologEnd(nullptr), Symbol(nullptr), |
| HandlesUnwind(false), HandlesExceptions(false), LastFrameInst(-1), |
| ChainedParent(nullptr), Instructions() {} |
| MCSymbol *Begin; |
| MCSymbol *End; |
| const MCSymbol *ExceptionHandler; |
| const MCSymbol *Function; |
| MCSymbol *PrologEnd; |
| MCSymbol *Symbol; |
| bool HandlesUnwind; |
| bool HandlesExceptions; |
| int LastFrameInst; |
| MCWinFrameInfo *ChainedParent; |
| std::vector<WinEH::Instruction> Instructions; |
| }; |
| |
| class MCWin64EHUnwindEmitter { |
| public: |
| static StringRef GetSectionSuffix(const MCSymbol *func); |
| // |
| // This emits the unwind info sections (.pdata and .xdata in PE/COFF). |
| // |
| static void Emit(MCStreamer &streamer); |
| static void EmitUnwindInfo(MCStreamer &streamer, MCWinFrameInfo *info); |
| }; |
| } // end namespace llvm |
| |
| #endif |