81 lines · cpp
1//===-- X86WinCOFFStreamer.cpp - X86 Target WinCOFF Streamer ----*- C++ -*-===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#include "X86MCTargetDesc.h"10#include "X86TargetStreamer.h"11#include "llvm/MC/MCAsmBackend.h"12#include "llvm/MC/MCAssembler.h"13#include "llvm/MC/MCCodeEmitter.h"14#include "llvm/MC/MCObjectWriter.h"15#include "llvm/MC/MCWin64EH.h"16#include "llvm/MC/MCWinCOFFStreamer.h"17 18using namespace llvm;19 20namespace {21class X86WinCOFFStreamer : public MCWinCOFFStreamer {22 Win64EH::UnwindEmitter EHStreamer;23public:24 X86WinCOFFStreamer(MCContext &C, std::unique_ptr<MCAsmBackend> AB,25 std::unique_ptr<MCCodeEmitter> CE,26 std::unique_ptr<MCObjectWriter> OW)27 : MCWinCOFFStreamer(C, std::move(AB), std::move(CE), std::move(OW)) {}28 29 void emitInstruction(const MCInst &Inst, const MCSubtargetInfo &STI) override;30 void emitWinEHHandlerData(SMLoc Loc) override;31 void emitWindowsUnwindTables(WinEH::FrameInfo *Frame) override;32 void emitWindowsUnwindTables() override;33 void emitCVFPOData(const MCSymbol *ProcSym, SMLoc Loc) override;34 void finishImpl() override;35};36 37void X86WinCOFFStreamer::emitInstruction(const MCInst &Inst,38 const MCSubtargetInfo &STI) {39 X86_MC::emitInstruction(*this, Inst, STI);40}41 42void X86WinCOFFStreamer::emitWinEHHandlerData(SMLoc Loc) {43 MCStreamer::emitWinEHHandlerData(Loc);44 45 // We have to emit the unwind info now, because this directive46 // actually switches to the .xdata section.47 if (WinEH::FrameInfo *CurFrame = getCurrentWinFrameInfo())48 EHStreamer.EmitUnwindInfo(*this, CurFrame, /* HandlerData = */ true);49}50 51void X86WinCOFFStreamer::emitWindowsUnwindTables(WinEH::FrameInfo *Frame) {52 EHStreamer.EmitUnwindInfo(*this, Frame, /* HandlerData = */ false);53}54 55void X86WinCOFFStreamer::emitWindowsUnwindTables() {56 if (!getNumWinFrameInfos())57 return;58 EHStreamer.Emit(*this);59}60 61void X86WinCOFFStreamer::emitCVFPOData(const MCSymbol *ProcSym, SMLoc Loc) {62 X86TargetStreamer *XTS =63 static_cast<X86TargetStreamer *>(getTargetStreamer());64 XTS->emitFPOData(ProcSym, Loc);65}66 67void X86WinCOFFStreamer::finishImpl() {68 emitFrames();69 emitWindowsUnwindTables();70 71 MCWinCOFFStreamer::finishImpl();72}73} // namespace74 75MCStreamer *76llvm::createX86WinCOFFStreamer(MCContext &C, std::unique_ptr<MCAsmBackend> &&AB,77 std::unique_ptr<MCObjectWriter> &&OW,78 std::unique_ptr<MCCodeEmitter> &&CE) {79 return new X86WinCOFFStreamer(C, std::move(AB), std::move(CE), std::move(OW));80}81