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https://github.com/c64scene-ar/llvm-6502.git
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adcb2d1636
This makes the opcode an opaque value (unsigned int) rather than the enumeration. This permits the use of target specific operands. Split out the generic type into a MCWinEH header and add a supporting MCWin64EH::Instruction to abstract out the selection of the opcode and construction of the actual instruction. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213221 91177308-0d34-0410-b5e6-96231b3b80d8
88 lines
2.9 KiB
C++
88 lines
2.9 KiB
C++
//===- MCWin64EH.h - Machine Code Win64 EH 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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//
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// This file contains declarations to support the Win64 Exception Handling
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// scheme in MC.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_MC_MCWIN64EH_H
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#define LLVM_MC_MCWIN64EH_H
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#include "llvm/MC/MCWinEH.h"
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#include "llvm/Support/Win64EH.h"
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#include <vector>
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namespace llvm {
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class StringRef;
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class MCStreamer;
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class MCSymbol;
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namespace Win64EH {
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struct Instruction {
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static WinEH::Instruction PushNonVol(MCSymbol *L, unsigned Reg) {
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return WinEH::Instruction(Win64EH::UOP_PushNonVol, L, Reg, -1);
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}
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static WinEH::Instruction Alloc(MCSymbol *L, unsigned Size) {
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return WinEH::Instruction(Size > 128 ? UOP_AllocLarge : UOP_AllocSmall, L,
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-1, Size);
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}
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static WinEH::Instruction PushMachFrame(MCSymbol *L, bool Code) {
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return WinEH::Instruction(UOP_PushMachFrame, L, -1, Code ? 1 : 0);
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}
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static WinEH::Instruction SaveNonVol(MCSymbol *L, unsigned Reg,
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unsigned Offset) {
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return WinEH::Instruction(Offset > 512 * 1024 - 8 ? UOP_SaveNonVolBig
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: UOP_SaveNonVol,
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L, Reg, Offset);
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}
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static WinEH::Instruction SaveXMM(MCSymbol *L, unsigned Reg,
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unsigned Offset) {
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return WinEH::Instruction(Offset > 512 * 1024 - 8 ? UOP_SaveXMM128Big
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: UOP_SaveXMM128,
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L, Reg, Offset);
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}
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static WinEH::Instruction SetFPReg(MCSymbol *L, unsigned Reg, unsigned Off) {
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return WinEH::Instruction(UOP_SetFPReg, L, Reg, Off);
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}
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};
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}
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struct MCWinFrameInfo {
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MCWinFrameInfo()
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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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MCSymbol *Begin;
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MCSymbol *End;
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const MCSymbol *ExceptionHandler;
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const MCSymbol *Function;
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MCSymbol *PrologEnd;
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MCSymbol *Symbol;
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bool HandlesUnwind;
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bool HandlesExceptions;
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int LastFrameInst;
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MCWinFrameInfo *ChainedParent;
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std::vector<WinEH::Instruction> Instructions;
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};
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class MCWin64EHUnwindEmitter {
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public:
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static StringRef GetSectionSuffix(const MCSymbol *func);
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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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static void Emit(MCStreamer &streamer);
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static void EmitUnwindInfo(MCStreamer &streamer, MCWinFrameInfo *info);
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};
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} // end namespace llvm
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#endif
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