mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-07-21 18:29:45 +00:00
7521964d28
This starts merging MCSection and MCSectionData. There are a few issues with the current split between MCSection and MCSectionData. * It optimizes the the not as important case. We want the production of .o files to be really fast, but the split puts the information used for .o emission in a separate data structure. * The ELF/COFF/MachO hierarchy is not represented in MCSectionData, leading to some ad-hoc ways to represent the various flags. * It makes it harder to remember where each item is. The attached patch starts merging the two by moving the alignment from MCSectionData to MCSection. Most of the patch is actually just dropping 'const', since MCSectionData is mutable, but MCSection was not. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237936 91177308-0d34-0410-b5e6-96231b3b80d8
85 lines
2.6 KiB
C++
85 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 MCSection *getPDataSection(const MCSymbol *Function,
|
|
MCContext &Context);
|
|
static MCSection *getXDataSection(const MCSymbol *Function,
|
|
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
|