include/llvm/MC/MCWin64EH.h

   1 //===- MCWin64EH.h - Machine Code Win64 EH support --------------*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // This file contains declarations to support the Win64 Exception Handling
  10 // scheme in MC.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #ifndef LLVM_MC_MCWIN64EH_H
  15 #define LLVM_MC_MCWIN64EH_H
  16
  17 #include "llvm/MC/MCWinEH.h"
  18 #include "llvm/Support/Win64EH.h"
  19
  20 namespace llvm {
  21 class MCStreamer;
  22 class MCSymbol;
  23
  24 namespace Win64EH {
  25 struct Instruction {
  26   static WinEH::Instruction PushNonVol(MCSymbol *L, unsigned Reg) {
  27     return WinEH::Instruction(Win64EH::UOP_PushNonVol, L, Reg, -1);
  28   }
  29   static WinEH::Instruction Alloc(MCSymbol *L, unsigned Size) {
  30     return WinEH::Instruction(Size > 128 ? UOP_AllocLarge : UOP_AllocSmall, L,
  31                               -1, Size);
  32   }
  33   static WinEH::Instruction PushMachFrame(MCSymbol *L, bool Code) {
  34     return WinEH::Instruction(UOP_PushMachFrame, L, -1, Code ? 1 : 0);
  35   }
  36   static WinEH::Instruction SaveNonVol(MCSymbol *L, unsigned Reg,
  37                                        unsigned Offset) {
  38     return WinEH::Instruction(Offset > 512 * 1024 - 8 ? UOP_SaveNonVolBig
  39                                                       : UOP_SaveNonVol,
  40                               L, Reg, Offset);
  41   }
  42   static WinEH::Instruction SaveXMM(MCSymbol *L, unsigned Reg,
  43                                     unsigned Offset) {
  44     return WinEH::Instruction(Offset > 512 * 1024 - 8 ? UOP_SaveXMM128Big
  45                                                       : UOP_SaveXMM128,
  46                               L, Reg, Offset);
  47   }
  48   static WinEH::Instruction SetFPReg(MCSymbol *L, unsigned Reg, unsigned Off) {
  49     return WinEH::Instruction(UOP_SetFPReg, L, Reg, Off);
  50   }
  51 };
  52
  53 class UnwindEmitter : public WinEH::UnwindEmitter {
  54 public:
  55   void Emit(MCStreamer &Streamer) const override;
  56   void EmitUnwindInfo(MCStreamer &Streamer, WinEH::FrameInfo *FI) const override;
  57 };
  58
  59 class ARM64UnwindEmitter : public WinEH::UnwindEmitter {
  60 public:
  61   void Emit(MCStreamer &Streamer) const override;
  62   void EmitUnwindInfo(MCStreamer &Streamer,
  63                       WinEH::FrameInfo *FI) const override;
  64 };
  65
  66 }
  67 } // end namespace llvm
  68
  69 #endif