mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-11-23 16:19:52 +00:00
083db8b72c
This is the first of a number of changes designed to generalise MCWin64EHInstruction to support different target architectures. An ordered set (vector) of these instructions is saved per frame to permit the emission of information for Windows NT style unwinding. The only bit of information which is actually target specific here is the Opcode for the unwinding bytecode. The remainder of the information is simply generic information that is relevant to the Windows NT unwinding model. Remove the accessors for the fields, making them const and public instead. Sink the knowledge of the alias'ed name into the single source and sink a single-use check method into the use. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212914 91177308-0d34-0410-b5e6-96231b3b80d8
90 lines
2.7 KiB
C++
90 lines
2.7 KiB
C++
//===- MCWin64EH.h - Machine Code Win64 EH support --------------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file contains declarations to support the Win64 Exception Handling
|
|
// scheme in MC.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_MC_MCWIN64EH_H
|
|
#define LLVM_MC_MCWIN64EH_H
|
|
|
|
#include "llvm/Support/Win64EH.h"
|
|
#include <cassert>
|
|
#include <vector>
|
|
|
|
namespace llvm {
|
|
class StringRef;
|
|
class MCStreamer;
|
|
class MCSymbol;
|
|
|
|
struct MCWin64EHInstruction {
|
|
typedef Win64EH::UnwindOpcodes OpType;
|
|
const OpType Operation;
|
|
const MCSymbol *Label;
|
|
const unsigned Offset;
|
|
const unsigned Register;
|
|
|
|
MCWin64EHInstruction(OpType Op, MCSymbol *L, unsigned Reg)
|
|
: Operation(Op), Label(L), Offset(0), Register(Reg) {
|
|
assert(Op == Win64EH::UOP_PushNonVol);
|
|
}
|
|
|
|
MCWin64EHInstruction(MCSymbol *L, unsigned Size)
|
|
: Operation(Size > 128 ? Win64EH::UOP_AllocLarge
|
|
: Win64EH::UOP_AllocSmall),
|
|
Label(L), Offset(Size), Register(-1) {}
|
|
|
|
MCWin64EHInstruction(OpType Op, MCSymbol *L, unsigned Reg, unsigned Off)
|
|
: Operation(Op), Label(L), Offset(Off), Register(Reg) {
|
|
assert(Op == Win64EH::UOP_SetFPReg ||
|
|
Op == Win64EH::UOP_SaveNonVol ||
|
|
Op == Win64EH::UOP_SaveNonVolBig ||
|
|
Op == Win64EH::UOP_SaveXMM128 ||
|
|
Op == Win64EH::UOP_SaveXMM128Big);
|
|
}
|
|
|
|
MCWin64EHInstruction(OpType Op, MCSymbol *L, bool Code)
|
|
: Operation(Op), Label(L), Offset(Code ? 1 : 0), Register(-1) {
|
|
assert(Op == Win64EH::UOP_PushMachFrame);
|
|
}
|
|
};
|
|
|
|
struct MCWinFrameInfo {
|
|
MCWinFrameInfo()
|
|
: Begin(nullptr), End(nullptr),ExceptionHandler(nullptr),
|
|
Function(nullptr), PrologEnd(nullptr), Symbol(nullptr),
|
|
HandlesUnwind(false), HandlesExceptions(false), LastFrameInst(-1),
|
|
ChainedParent(nullptr), Instructions() {}
|
|
MCSymbol *Begin;
|
|
MCSymbol *End;
|
|
const MCSymbol *ExceptionHandler;
|
|
const MCSymbol *Function;
|
|
MCSymbol *PrologEnd;
|
|
MCSymbol *Symbol;
|
|
bool HandlesUnwind;
|
|
bool HandlesExceptions;
|
|
int LastFrameInst;
|
|
MCWinFrameInfo *ChainedParent;
|
|
std::vector<MCWin64EHInstruction> Instructions;
|
|
};
|
|
|
|
class MCWin64EHUnwindEmitter {
|
|
public:
|
|
static StringRef GetSectionSuffix(const MCSymbol *func);
|
|
//
|
|
// This emits the unwind info sections (.pdata and .xdata in PE/COFF).
|
|
//
|
|
static void Emit(MCStreamer &streamer);
|
|
static void EmitUnwindInfo(MCStreamer &streamer, MCWinFrameInfo *info);
|
|
};
|
|
} // end namespace llvm
|
|
|
|
#endif
|