Line data    Source code

       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 {
      27             :   static WinEH::Instruction PushNonVol(MCSymbol *L, unsigned Reg) {
      28             :     return WinEH::Instruction(Win64EH::UOP_PushNonVol, L, Reg, -1);
      29             :   }
      30             :   static WinEH::Instruction Alloc(MCSymbol *L, unsigned Size) {
      31             :     return WinEH::Instruction(Size > 128 ? UOP_AllocLarge : UOP_AllocSmall, L,
      32         537 :                               -1, Size);
      33             :   }
      34             :   static WinEH::Instruction PushMachFrame(MCSymbol *L, bool Code) {
      35           2 :     return WinEH::Instruction(UOP_PushMachFrame, L, -1, Code ? 1 : 0);
      36             :   }
      37             :   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           2 :                               L, Reg, Offset);
      42             :   }
      43             :   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         194 :                               L, Reg, Offset);
      48             :   }
      49             :   static WinEH::Instruction SetFPReg(MCSymbol *L, unsigned Reg, unsigned Off) {
      50             :     return WinEH::Instruction(UOP_SetFPReg, L, Reg, Off);
      51             :   }
      52             : };
      53             : 
      54         410 : 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