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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
70 lines
2.0 KiB
C++
70 lines
2.0 KiB
C++
//===- MCWinEH.h - Windows Unwinding Support --------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_MC_MCWINEH_H
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#define LLVM_MC_MCWINEH_H
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#include "llvm/ADT/MapVector.h"
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#include <vector>
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namespace llvm {
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class MCSection;
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class MCStreamer;
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class MCSymbol;
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namespace WinEH {
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struct Instruction {
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const MCSymbol *Label;
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unsigned Offset;
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unsigned Register;
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unsigned Operation;
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Instruction(unsigned Op, MCSymbol *L, unsigned Reg, unsigned Off)
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: Label(L), Offset(Off), Register(Reg), Operation(Op) {}
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};
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struct FrameInfo {
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const MCSymbol *Begin = nullptr;
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const MCSymbol *End = nullptr;
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const MCSymbol *FuncletOrFuncEnd = nullptr;
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const MCSymbol *ExceptionHandler = nullptr;
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const MCSymbol *Function = nullptr;
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const MCSymbol *PrologEnd = nullptr;
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const MCSymbol *Symbol = nullptr;
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const MCSection *TextSection = nullptr;
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bool HandlesUnwind = false;
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bool HandlesExceptions = false;
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int LastFrameInst = -1;
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const FrameInfo *ChainedParent = nullptr;
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std::vector<Instruction> Instructions;
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MapVector<MCSymbol*, std::vector<Instruction>> EpilogMap;
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FrameInfo() = default;
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FrameInfo(const MCSymbol *Function, const MCSymbol *BeginFuncEHLabel)
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: Begin(BeginFuncEHLabel), Function(Function) {}
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FrameInfo(const MCSymbol *Function, const MCSymbol *BeginFuncEHLabel,
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const FrameInfo *ChainedParent)
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: Begin(BeginFuncEHLabel), Function(Function),
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ChainedParent(ChainedParent) {}
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};
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class UnwindEmitter {
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public:
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virtual ~UnwindEmitter();
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/// This emits the unwind info sections (.pdata and .xdata in PE/COFF).
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virtual void Emit(MCStreamer &Streamer) const = 0;
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virtual void EmitUnwindInfo(MCStreamer &Streamer, FrameInfo *FI) const = 0;
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};
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}
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}
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#endif
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