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 {
PushNonVolInstruction27   static WinEH::Instruction PushNonVol(MCSymbol *L, unsigned Reg) {
28     return WinEH::Instruction(Win64EH::UOP_PushNonVol, L, Reg, -1);
29   }
AllocInstruction30   static WinEH::Instruction Alloc(MCSymbol *L, unsigned Size) {
31     return WinEH::Instruction(Size > 128 ? UOP_AllocLarge : UOP_AllocSmall, L,
32                               -1, Size);
33   }
PushMachFrameInstruction34   static WinEH::Instruction PushMachFrame(MCSymbol *L, bool Code) {
35     return WinEH::Instruction(UOP_PushMachFrame, L, -1, Code ? 1 : 0);
36   }
SaveNonVolInstruction37   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   }
SaveXMMInstruction43   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   }
SetFPRegInstruction49   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