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 "X86TargetStreamer.h"
12 #include "llvm/MC/MCAsmBackend.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:
X86WinCOFFStreamer(MCContext & C,std::unique_ptr<MCAsmBackend> AB,std::unique_ptr<MCCodeEmitter> CE,std::unique_ptr<MCObjectWriter> OW)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() override;
31 void EmitCVFPOData(const MCSymbol *ProcSym, SMLoc Loc) override;
32 void FinishImpl() override;
33 };
34
EmitWinEHHandlerData(SMLoc Loc)35 void X86WinCOFFStreamer::EmitWinEHHandlerData(SMLoc Loc) {
36 MCStreamer::EmitWinEHHandlerData(Loc);
37
38 // We have to emit the unwind info now, because this directive
39 // actually switches to the .xdata section!
40 EHStreamer.EmitUnwindInfo(*this, getCurrentWinFrameInfo());
41 }
42
EmitWindowsUnwindTables()43 void X86WinCOFFStreamer::EmitWindowsUnwindTables() {
44 if (!getNumWinFrameInfos())
45 return;
46 EHStreamer.Emit(*this);
47 }
48
EmitCVFPOData(const MCSymbol * ProcSym,SMLoc Loc)49 void X86WinCOFFStreamer::EmitCVFPOData(const MCSymbol *ProcSym, SMLoc Loc) {
50 X86TargetStreamer *XTS =
51 static_cast<X86TargetStreamer *>(getTargetStreamer());
52 XTS->emitFPOData(ProcSym, Loc);
53 }
54
FinishImpl()55 void X86WinCOFFStreamer::FinishImpl() {
56 EmitFrames(nullptr);
57 EmitWindowsUnwindTables();
58
59 MCWinCOFFStreamer::FinishImpl();
60 }
61 }
62
createX86WinCOFFStreamer(MCContext & C,std::unique_ptr<MCAsmBackend> && AB,std::unique_ptr<MCObjectWriter> && OW,std::unique_ptr<MCCodeEmitter> && CE,bool RelaxAll,bool IncrementalLinkerCompatible)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