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f835c87c83
suffix (e.g. .xdata$myfunc). The suffix part isn't implemented yet, but I'll get to it in the next patch. Fix up all callers of the affected functions. Make them pass said suffix to the function. llvm-svn: 132205
94 lines
3.1 KiB
C++
94 lines
3.1 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 StringRef;
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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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static StringRef GetSectionSuffix(const MCSymbol *func);
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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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