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https://github.com/c64scene-ar/llvm-6502.git
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7cc1de1090
This changes Win64EHEmitter into a utility WinEH UnwindEmitter that can be shared across multiple architectures and a target specific bit which is overridden (Win64::UnwindEmitter). This enables sharing the section selection code across X86 and the intended use in ARM for emitting unwind information for Windows on ARM. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215050 91177308-0d34-0410-b5e6-96231b3b80d8
84 lines
2.6 KiB
C++
84 lines
2.6 KiB
C++
//===- MCWinEH.h - Windows Unwinding 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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#ifndef LLVM_MC_MCWINEH_H
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#define LLVM_MC_MCWINEH_H
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#include <vector>
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namespace llvm {
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class MCContext;
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class MCSection;
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class MCStreamer;
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class MCSymbol;
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class StringRef;
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namespace WinEH {
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struct Instruction {
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const MCSymbol *Label;
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const unsigned Offset;
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const unsigned Register;
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const 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;
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const MCSymbol *End;
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const MCSymbol *ExceptionHandler;
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const MCSymbol *Function;
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const MCSymbol *PrologEnd;
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const MCSymbol *Symbol;
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bool HandlesUnwind;
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bool HandlesExceptions;
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int LastFrameInst;
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const FrameInfo *ChainedParent;
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std::vector<Instruction> Instructions;
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FrameInfo()
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: Begin(nullptr), End(nullptr), ExceptionHandler(nullptr),
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Function(nullptr), PrologEnd(nullptr), Symbol(nullptr),
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HandlesUnwind(false), HandlesExceptions(false), LastFrameInst(-1),
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ChainedParent(nullptr), Instructions() {}
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FrameInfo(const MCSymbol *Function, const MCSymbol *BeginFuncEHLabel)
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: Begin(BeginFuncEHLabel), End(nullptr), ExceptionHandler(nullptr),
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Function(Function), PrologEnd(nullptr), Symbol(nullptr),
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HandlesUnwind(false), HandlesExceptions(false), LastFrameInst(-1),
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ChainedParent(nullptr), Instructions() {}
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FrameInfo(const MCSymbol *Function, const MCSymbol *BeginFuncEHLabel,
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const FrameInfo *ChainedParent)
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: Begin(BeginFuncEHLabel), End(nullptr), ExceptionHandler(nullptr),
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Function(Function), PrologEnd(nullptr), Symbol(nullptr),
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HandlesUnwind(false), HandlesExceptions(false), LastFrameInst(-1),
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ChainedParent(ChainedParent), Instructions() {}
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};
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class UnwindEmitter {
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public:
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static StringRef GetSectionSuffix(const MCSymbol *Function);
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static const MCSection *GetPDataSection(StringRef Suffix, MCContext &Context);
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static const MCSection *GetXDataSection(StringRef Suffix, MCContext &Context);
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virtual ~UnwindEmitter() { }
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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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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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