llvm/MC/MCWin64EH.h

0001 //===- MCWin64EH.h - Machine Code Win64 EH support --------------*- C++ -*-===//
0002 //
0003 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
0004 // See https://llvm.org/LICENSE.txt for license information.
0005 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
0006 //
0007 //===----------------------------------------------------------------------===//
0008 //
0009 // This file contains declarations to support the Win64 Exception Handling
0010 // scheme in MC.
0011 //
0012 //===----------------------------------------------------------------------===//
0013
0014 #ifndef LLVM_MC_MCWIN64EH_H
0015 #define LLVM_MC_MCWIN64EH_H
0016
0017 #include "llvm/MC/MCWinEH.h"
0018 #include "llvm/Support/Win64EH.h"
0019
0020 namespace llvm {
0021 class MCStreamer;
0022 class MCSymbol;
0023
0024 namespace Win64EH {
0025 struct Instruction {
0026   static WinEH::Instruction PushNonVol(MCSymbol *L, unsigned Reg) {
0027     return WinEH::Instruction(Win64EH::UOP_PushNonVol, L, Reg, -1);
0028   }
0029   static WinEH::Instruction Alloc(MCSymbol *L, unsigned Size) {
0030     return WinEH::Instruction(Size > 128 ? UOP_AllocLarge : UOP_AllocSmall, L,
0031                               -1, Size);
0032   }
0033   static WinEH::Instruction PushMachFrame(MCSymbol *L, bool Code) {
0034     return WinEH::Instruction(UOP_PushMachFrame, L, -1, Code ? 1 : 0);
0035   }
0036   static WinEH::Instruction SaveNonVol(MCSymbol *L, unsigned Reg,
0037                                        unsigned Offset) {
0038     return WinEH::Instruction(Offset > 512 * 1024 - 8 ? UOP_SaveNonVolBig
0039                                                       : UOP_SaveNonVol,
0040                               L, Reg, Offset);
0041   }
0042   static WinEH::Instruction SaveXMM(MCSymbol *L, unsigned Reg,
0043                                     unsigned Offset) {
0044     return WinEH::Instruction(Offset > 512 * 1024 - 8 ? UOP_SaveXMM128Big
0045                                                       : UOP_SaveXMM128,
0046                               L, Reg, Offset);
0047   }
0048   static WinEH::Instruction SetFPReg(MCSymbol *L, unsigned Reg, unsigned Off) {
0049     return WinEH::Instruction(UOP_SetFPReg, L, Reg, Off);
0050   }
0051 };
0052
0053 class UnwindEmitter : public WinEH::UnwindEmitter {
0054 public:
0055   void Emit(MCStreamer &Streamer) const override;
0056   void EmitUnwindInfo(MCStreamer &Streamer, WinEH::FrameInfo *FI,
0057                       bool HandlerData) const override;
0058 };
0059
0060 class ARMUnwindEmitter : public WinEH::UnwindEmitter {
0061 public:
0062   void Emit(MCStreamer &Streamer) const override;
0063   void EmitUnwindInfo(MCStreamer &Streamer, WinEH::FrameInfo *FI,
0064                       bool HandlerData) const override;
0065 };
0066
0067 class ARM64UnwindEmitter : public WinEH::UnwindEmitter {
0068 public:
0069   void Emit(MCStreamer &Streamer) const override;
0070   void EmitUnwindInfo(MCStreamer &Streamer, WinEH::FrameInfo *FI,
0071                       bool HandlerData) const override;
0072 };
0073 }
0074 } // end namespace llvm
0075
0076 #endif