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c4cbf9b6aa
Use them to calculate the offset inside the prolog. Emit this value when emitting the unwind codes. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132177 91177308-0d34-0410-b5e6-96231b3b80d8
92 lines
3.0 KiB
C++
92 lines
3.0 KiB
C++
//===- MCWin64EH.h - Machine Code Win64 EH support --------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains declarations to support the Win64 Exception Handling
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// scheme in MC.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_MC_MCWIN64EH_H
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#define LLVM_MC_MCWIN64EH_H
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#include "llvm/Support/Win64EH.h"
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#include <cassert>
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#include <vector>
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namespace llvm {
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class MCStreamer;
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class MCSymbol;
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class MCWin64EHInstruction {
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public:
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typedef Win64EH::UnwindOpcodes OpType;
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private:
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OpType Operation;
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MCSymbol *Label;
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unsigned Offset;
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unsigned Register;
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public:
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MCWin64EHInstruction(OpType Op, MCSymbol *L, unsigned Reg)
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: Operation(Op), Label(L), Offset(0), Register(Reg) {
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assert(Op == Win64EH::UOP_PushNonVol);
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}
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MCWin64EHInstruction(MCSymbol *L, unsigned Size)
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: Operation(Size>128 ? Win64EH::UOP_AllocLarge : Win64EH::UOP_AllocSmall),
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Label(L), Offset(Size) { }
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MCWin64EHInstruction(OpType Op, MCSymbol *L, unsigned Reg, unsigned Off)
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: Operation(Op), Label(L), Offset(Off), Register(Reg) {
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assert(Op == Win64EH::UOP_SetFPReg ||
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Op == Win64EH::UOP_SaveNonVol ||
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Op == Win64EH::UOP_SaveNonVolBig ||
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Op == Win64EH::UOP_SaveXMM128 ||
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Op == Win64EH::UOP_SaveXMM128Big);
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}
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MCWin64EHInstruction(OpType Op, MCSymbol *L, bool Code)
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: Operation(Op), Label(L), Offset(Code ? 1 : 0) {
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assert(Op == Win64EH::UOP_PushMachFrame);
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}
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OpType getOperation() const { return Operation; }
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MCSymbol *getLabel() const { return Label; }
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unsigned getOffset() const { return Offset; }
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unsigned getSize() const { return Offset; }
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unsigned getRegister() const { return Register; }
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bool isPushCodeFrame() const { return Offset == 1; }
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};
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struct MCWin64EHUnwindInfo {
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MCWin64EHUnwindInfo() : Begin(0), End(0), ExceptionHandler(0),
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Function(0), PrologEnd(0), Symbol(0),
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HandlesUnwind(false), HandlesExceptions(false),
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LastFrameInst(-1), ChainedParent(0),
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Instructions() {}
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MCSymbol *Begin;
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MCSymbol *End;
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const MCSymbol *ExceptionHandler;
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const MCSymbol *Function;
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MCSymbol *PrologEnd;
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MCSymbol *Symbol;
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bool HandlesUnwind;
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bool HandlesExceptions;
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int LastFrameInst;
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MCWin64EHUnwindInfo *ChainedParent;
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std::vector<MCWin64EHInstruction> Instructions;
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};
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class MCWin64EHUnwindEmitter {
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public:
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//
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// This emits the unwind info sections (.pdata and .xdata in PE/COFF).
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//
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static void Emit(MCStreamer &streamer);
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static void EmitUnwindInfo(MCStreamer &streamer, MCWin64EHUnwindInfo *info);
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};
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} // end namespace llvm
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#endif
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