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/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 18 using namespace llvm; 19 20 namespace { 21 class X86WinCOFFStreamer : public MCWinCOFFStreamer { 22 Win64EH::UnwindEmitter EHStreamer; 23 public: 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 emitWinEHHandlerData(SMLoc Loc) override; 30 void emitWindowsUnwindTables(WinEH::FrameInfo *Frame) override; 31 void emitWindowsUnwindTables() override; 32 void emitCVFPOData(const MCSymbol *ProcSym, SMLoc Loc) override; 33 void finishImpl() override; 34 }; 35 36 void X86WinCOFFStreamer::emitWinEHHandlerData(SMLoc Loc) { 37 MCStreamer::emitWinEHHandlerData(Loc); 38 39 // We have to emit the unwind info now, because this directive 40 // actually switches to the .xdata section. 41 if (WinEH::FrameInfo *CurFrame = getCurrentWinFrameInfo()) 42 EHStreamer.EmitUnwindInfo(*this, CurFrame, /* HandlerData = */ true); 43 } 44 45 void X86WinCOFFStreamer::emitWindowsUnwindTables(WinEH::FrameInfo *Frame) { 46 EHStreamer.EmitUnwindInfo(*this, Frame, /* HandlerData = */ false); 47 } 48 49 void X86WinCOFFStreamer::emitWindowsUnwindTables() { 50 if (!getNumWinFrameInfos()) 51 return; 52 EHStreamer.Emit(*this); 53 } 54 55 void X86WinCOFFStreamer::emitCVFPOData(const MCSymbol *ProcSym, SMLoc Loc) { 56 X86TargetStreamer *XTS = 57 static_cast<X86TargetStreamer *>(getTargetStreamer()); 58 XTS->emitFPOData(ProcSym, Loc); 59 } 60 61 void X86WinCOFFStreamer::finishImpl() { 62 emitFrames(nullptr); 63 emitWindowsUnwindTables(); 64 65 MCWinCOFFStreamer::finishImpl(); 66 } 67 } // namespace 68 69 MCStreamer *llvm::createX86WinCOFFStreamer(MCContext &C, 70 std::unique_ptr<MCAsmBackend> &&AB, 71 std::unique_ptr<MCObjectWriter> &&OW, 72 std::unique_ptr<MCCodeEmitter> &&CE, 73 bool RelaxAll, 74 bool IncrementalLinkerCompatible) { 75 X86WinCOFFStreamer *S = 76 new X86WinCOFFStreamer(C, std::move(AB), std::move(CE), std::move(OW)); 77 S->getAssembler().setRelaxAll(RelaxAll); 78 S->getAssembler().setIncrementalLinkerCompatible(IncrementalLinkerCompatible); 79 return S; 80 } 81 82