X86WinCOFFStreamer.cpp revision 341825 
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
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 EmitWinEHHandlerData(SMLoc Loc) override;
30  void EmitWindowsUnwindTables() override;
31  void EmitCVFPOData(const MCSymbol *ProcSym, SMLoc Loc) override;
32  void FinishImpl() override;
33};
34
35void 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
43void X86WinCOFFStreamer::EmitWindowsUnwindTables() {
44  if (!getNumWinFrameInfos())
45    return;
46  EHStreamer.Emit(*this);
47}
48
49void X86WinCOFFStreamer::EmitCVFPOData(const MCSymbol *ProcSym, SMLoc Loc) {
50  X86TargetStreamer *XTS =
51      static_cast<X86TargetStreamer *>(getTargetStreamer());
52  XTS->emitFPOData(ProcSym, Loc);
53}
54
55void X86WinCOFFStreamer::FinishImpl() {
56  EmitFrames(nullptr);
57  EmitWindowsUnwindTables();
58
59  MCWinCOFFStreamer::FinishImpl();
60}
61}
62
63MCStreamer *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