1 //===-- X86WinCOFFStreamer.cpp - X86 Target WinCOFF Streamer ----*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "X86MCTargetDesc.h" 11 #include "llvm/MC/MCWin64EH.h" 12 #include "llvm/MC/MCWinCOFFStreamer.h" 13 14 using namespace llvm; 15 16 namespace { 17 class X86WinCOFFStreamer : public MCWinCOFFStreamer { 18 Win64EH::UnwindEmitter EHStreamer; 19 public: 20 X86WinCOFFStreamer(MCContext &C, MCAsmBackend &AB, MCCodeEmitter *CE, 21 raw_pwrite_stream &OS) 22 : MCWinCOFFStreamer(C, AB, *CE, OS) {} 23 24 void EmitWinEHHandlerData() override; 25 void EmitWindowsUnwindTables() override; 26 void FinishImpl() override; 27 }; 28 29 void X86WinCOFFStreamer::EmitWinEHHandlerData() { 30 MCStreamer::EmitWinEHHandlerData(); 31 32 // We have to emit the unwind info now, because this directive 33 // actually switches to the .xdata section! 34 EHStreamer.EmitUnwindInfo(*this, getCurrentWinFrameInfo()); 35 } 36 37 void X86WinCOFFStreamer::EmitWindowsUnwindTables() { 38 if (!getNumWinFrameInfos()) 39 return; 40 EHStreamer.Emit(*this); 41 } 42 43 void X86WinCOFFStreamer::FinishImpl() { 44 EmitFrames(nullptr); 45 EmitWindowsUnwindTables(); 46 47 MCWinCOFFStreamer::FinishImpl(); 48 } 49 } 50 51 MCStreamer *llvm::createX86WinCOFFStreamer(MCContext &C, MCAsmBackend &AB, 52 raw_pwrite_stream &OS, 53 MCCodeEmitter *CE, bool RelaxAll, 54 bool IncrementalLinkerCompatible) { 55 X86WinCOFFStreamer *S = new X86WinCOFFStreamer(C, AB, CE, OS); 56 S->getAssembler().setRelaxAll(RelaxAll); 57 S->getAssembler().setIncrementalLinkerCompatible(IncrementalLinkerCompatible); 58 return S; 59 } 60 61
