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-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "X86MCTargetDesc.h" 10 #include "X86TargetStreamer.h" 11 #include "llvm/MC/MCAsmBackend.h" 12 #include "llvm/MC/MCCodeEmitter.h" 13 #include "llvm/MC/MCObjectWriter.h" 14 #include "llvm/MC/MCWin64EH.h" 15 #include "llvm/MC/MCWinCOFFStreamer.h" 16 17 using namespace llvm; 18 19 namespace { 20 class X86WinCOFFStreamer : public MCWinCOFFStreamer { 21 Win64EH::UnwindEmitter EHStreamer; 22 public: 23 X86WinCOFFStreamer(MCContext &C, std::unique_ptr<MCAsmBackend> AB, 24 std::unique_ptr<MCCodeEmitter> CE, 25 std::unique_ptr<MCObjectWriter> OW) 26 : MCWinCOFFStreamer(C, std::move(AB), std::move(CE), std::move(OW)) {} 27 28 void EmitWinEHHandlerData(SMLoc Loc) override; 29 void EmitWindowsUnwindTables() override; 30 void EmitCVFPOData(const MCSymbol *ProcSym, SMLoc Loc) override; 31 void finishImpl() override; 32 }; 33 34 void X86WinCOFFStreamer::EmitWinEHHandlerData(SMLoc Loc) { 35 MCStreamer::EmitWinEHHandlerData(Loc); 36 37 // We have to emit the unwind info now, because this directive 38 // actually switches to the .xdata section. 39 if (WinEH::FrameInfo *CurFrame = getCurrentWinFrameInfo()) 40 EHStreamer.EmitUnwindInfo(*this, CurFrame); 41 } 42 43 void X86WinCOFFStreamer::EmitWindowsUnwindTables() { 44 if (!getNumWinFrameInfos()) 45 return; 46 EHStreamer.Emit(*this); 47 } 48 49 void X86WinCOFFStreamer::EmitCVFPOData(const MCSymbol *ProcSym, SMLoc Loc) { 50 X86TargetStreamer *XTS = 51 static_cast<X86TargetStreamer *>(getTargetStreamer()); 52 XTS->emitFPOData(ProcSym, Loc); 53 } 54 55 void X86WinCOFFStreamer::finishImpl() { 56 emitFrames(nullptr); 57 EmitWindowsUnwindTables(); 58 59 MCWinCOFFStreamer::finishImpl(); 60 } 61 } 62 63 MCStreamer *llvm::createX86WinCOFFStreamer(MCContext &C, 64 std::unique_ptr<MCAsmBackend> &&AB, 65 std::unique_ptr<MCObjectWriter> &&OW, 66 std::unique_ptr<MCCodeEmitter> &&CE, 67 bool RelaxAll, 68 bool IncrementalLinkerCompatible) { 69 X86WinCOFFStreamer *S = 70 new X86WinCOFFStreamer(C, std::move(AB), std::move(CE), std::move(OW)); 71 S->getAssembler().setRelaxAll(RelaxAll); 72 S->getAssembler().setIncrementalLinkerCompatible(IncrementalLinkerCompatible); 73 return S; 74 } 75 76