mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-09-03 18:29:48 +00:00
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++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_MC_MCWINEH_H
|
|
#define LLVM_MC_MCWINEH_H
|
|
|
|
#include <vector>
|
|
|
|
namespace llvm {
|
|
class MCContext;
|
|
class MCSection;
|
|
class MCStreamer;
|
|
class MCSymbol;
|
|
class StringRef;
|
|
|
|
namespace WinEH {
|
|
struct Instruction {
|
|
const MCSymbol *Label;
|
|
const unsigned Offset;
|
|
const unsigned Register;
|
|
const unsigned Operation;
|
|
|
|
Instruction(unsigned Op, MCSymbol *L, unsigned Reg, unsigned Off)
|
|
: Label(L), Offset(Off), Register(Reg), Operation(Op) {}
|
|
};
|
|
|
|
struct FrameInfo {
|
|
const MCSymbol *Begin;
|
|
const MCSymbol *End;
|
|
const MCSymbol *ExceptionHandler;
|
|
const MCSymbol *Function;
|
|
const MCSymbol *PrologEnd;
|
|
const MCSymbol *Symbol;
|
|
|
|
bool HandlesUnwind;
|
|
bool HandlesExceptions;
|
|
|
|
int LastFrameInst;
|
|
const FrameInfo *ChainedParent;
|
|
std::vector<Instruction> Instructions;
|
|
|
|
FrameInfo()
|
|
: Begin(nullptr), End(nullptr), ExceptionHandler(nullptr),
|
|
Function(nullptr), PrologEnd(nullptr), Symbol(nullptr),
|
|
HandlesUnwind(false), HandlesExceptions(false), LastFrameInst(-1),
|
|
ChainedParent(nullptr), Instructions() {}
|
|
FrameInfo(const MCSymbol *Function, const MCSymbol *BeginFuncEHLabel)
|
|
: Begin(BeginFuncEHLabel), End(nullptr), ExceptionHandler(nullptr),
|
|
Function(Function), PrologEnd(nullptr), Symbol(nullptr),
|
|
HandlesUnwind(false), HandlesExceptions(false), LastFrameInst(-1),
|
|
ChainedParent(nullptr), Instructions() {}
|
|
FrameInfo(const MCSymbol *Function, const MCSymbol *BeginFuncEHLabel,
|
|
const FrameInfo *ChainedParent)
|
|
: Begin(BeginFuncEHLabel), End(nullptr), ExceptionHandler(nullptr),
|
|
Function(Function), PrologEnd(nullptr), Symbol(nullptr),
|
|
HandlesUnwind(false), HandlesExceptions(false), LastFrameInst(-1),
|
|
ChainedParent(ChainedParent), Instructions() {}
|
|
};
|
|
|
|
class UnwindEmitter {
|
|
public:
|
|
static StringRef GetSectionSuffix(const MCSymbol *Function);
|
|
static const MCSection *GetPDataSection(StringRef Suffix, MCContext &Context);
|
|
static const MCSection *GetXDataSection(StringRef Suffix, MCContext &Context);
|
|
|
|
virtual ~UnwindEmitter() { }
|
|
|
|
//
|
|
// This emits the unwind info sections (.pdata and .xdata in PE/COFF).
|
|
//
|
|
virtual void Emit(MCStreamer &Streamer) const = 0;
|
|
virtual void EmitUnwindInfo(MCStreamer &Streamer, FrameInfo *FI) const = 0;
|
|
};
|
|
}
|
|
}
|
|
|
|
#endif
|