MCStreamer.cpp revision 16d7d437e03ce87fdaef7971919302920d54a966 
1//===- lib/MC/MCStreamer.cpp - Streaming Machine Code Output --------------===//
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 "llvm/MC/MCAsmInfo.h"
11#include "llvm/MC/MCContext.h"
12#include "llvm/MC/MCStreamer.h"
13#include "llvm/MC/MCExpr.h"
14#include "llvm/MC/MCObjectWriter.h"
15#include "llvm/MC/MCSymbol.h"
16#include "llvm/Support/ErrorHandling.h"
17#include "llvm/Support/raw_ostream.h"
18#include "llvm/ADT/SmallString.h"
19#include "llvm/ADT/Twine.h"
20#include <cstdlib>
21using namespace llvm;
22
23MCStreamer::MCStreamer(MCContext &Ctx) : Context(Ctx), EmitEHFrame(true),
24                                         EmitDebugFrame(false),
25                                         CurrentW64UnwindInfo(0),
26                                         LastSymbol(0),
27                                         UniqueCodeBeginSuffix(0),
28                                         UniqueDataBeginSuffix(0) {
29  const MCSection *section = NULL;
30  SectionStack.push_back(std::make_pair(section, section));
31}
32
33MCStreamer::~MCStreamer() {
34  for (unsigned i = 0; i < getNumW64UnwindInfos(); ++i)
35    delete W64UnwindInfos[i];
36}
37
38const MCExpr *MCStreamer::BuildSymbolDiff(MCContext &Context,
39                                          const MCSymbol *A,
40                                          const MCSymbol *B) {
41  MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
42  const MCExpr *ARef =
43    MCSymbolRefExpr::Create(A, Variant, Context);
44  const MCExpr *BRef =
45    MCSymbolRefExpr::Create(B, Variant, Context);
46  const MCExpr *AddrDelta =
47    MCBinaryExpr::Create(MCBinaryExpr::Sub, ARef, BRef, Context);
48  return AddrDelta;
49}
50
51const MCExpr *MCStreamer::ForceExpAbs(const MCExpr* Expr) {
52  if (Context.getAsmInfo().hasAggressiveSymbolFolding() ||
53      isa<MCSymbolRefExpr>(Expr))
54    return Expr;
55
56  MCSymbol *ABS = Context.CreateTempSymbol();
57  EmitAssignment(ABS, Expr);
58  return MCSymbolRefExpr::Create(ABS, Context);
59}
60
61raw_ostream &MCStreamer::GetCommentOS() {
62  // By default, discard comments.
63  return nulls();
64}
65
66void MCStreamer::EmitDwarfSetLineAddr(int64_t LineDelta,
67                                      const MCSymbol *Label, int PointerSize) {
68  // emit the sequence to set the address
69  EmitIntValue(dwarf::DW_LNS_extended_op, 1);
70  EmitULEB128IntValue(PointerSize + 1);
71  EmitIntValue(dwarf::DW_LNE_set_address, 1);
72  EmitSymbolValue(Label, PointerSize);
73
74  // emit the sequence for the LineDelta (from 1) and a zero address delta.
75  MCDwarfLineAddr::Emit(this, LineDelta, 0);
76}
77
78/// EmitIntValue - Special case of EmitValue that avoids the client having to
79/// pass in a MCExpr for constant integers.
80void MCStreamer::EmitIntValue(uint64_t Value, unsigned Size,
81                              unsigned AddrSpace) {
82  assert(Size <= 8 && "Invalid size");
83  assert((isUIntN(8 * Size, Value) || isIntN(8 * Size, Value)) &&
84         "Invalid size");
85  char buf[8];
86  const bool isLittleEndian = Context.getAsmInfo().isLittleEndian();
87  for (unsigned i = 0; i != Size; ++i) {
88    unsigned index = isLittleEndian ? i : (Size - i - 1);
89    buf[i] = uint8_t(Value >> (index * 8));
90  }
91  EmitBytes(StringRef(buf, Size), AddrSpace);
92}
93
94/// EmitULEB128Value - Special case of EmitULEB128Value that avoids the
95/// client having to pass in a MCExpr for constant integers.
96void MCStreamer::EmitULEB128IntValue(uint64_t Value, unsigned AddrSpace,
97                                     unsigned Padding) {
98  SmallString<32> Tmp;
99  raw_svector_ostream OSE(Tmp);
100  MCObjectWriter::EncodeULEB128(Value, OSE, Padding);
101  EmitBytes(OSE.str(), AddrSpace);
102}
103
104/// EmitSLEB128Value - Special case of EmitSLEB128Value that avoids the
105/// client having to pass in a MCExpr for constant integers.
106void MCStreamer::EmitSLEB128IntValue(int64_t Value, unsigned AddrSpace) {
107  SmallString<32> Tmp;
108  raw_svector_ostream OSE(Tmp);
109  MCObjectWriter::EncodeSLEB128(Value, OSE);
110  EmitBytes(OSE.str(), AddrSpace);
111}
112
113void MCStreamer::EmitAbsValue(const MCExpr *Value, unsigned Size,
114                              unsigned AddrSpace) {
115  const MCExpr *ABS = ForceExpAbs(Value);
116  EmitValue(ABS, Size, AddrSpace);
117}
118
119
120void MCStreamer::EmitValue(const MCExpr *Value, unsigned Size,
121                           unsigned AddrSpace) {
122  EmitValueImpl(Value, Size, AddrSpace);
123}
124
125void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size,
126                                  unsigned AddrSpace) {
127  EmitValueImpl(MCSymbolRefExpr::Create(Sym, getContext()), Size,
128                AddrSpace);
129}
130
131void MCStreamer::EmitGPRel32Value(const MCExpr *Value) {
132  report_fatal_error("unsupported directive in streamer");
133}
134
135/// EmitFill - Emit NumBytes bytes worth of the value specified by
136/// FillValue.  This implements directives such as '.space'.
137void MCStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue,
138                          unsigned AddrSpace) {
139  const MCExpr *E = MCConstantExpr::Create(FillValue, getContext());
140  for (uint64_t i = 0, e = NumBytes; i != e; ++i)
141    EmitValue(E, 1, AddrSpace);
142}
143
144bool MCStreamer::EmitDwarfFileDirective(unsigned FileNo,
145                                        StringRef Directory,
146                                        StringRef Filename) {
147  return getContext().GetDwarfFile(Directory, Filename, FileNo) == 0;
148}
149
150void MCStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
151                                       unsigned Column, unsigned Flags,
152                                       unsigned Isa,
153                                       unsigned Discriminator,
154                                       StringRef FileName) {
155  getContext().setCurrentDwarfLoc(FileNo, Line, Column, Flags, Isa,
156                                  Discriminator);
157}
158
159MCDwarfFrameInfo *MCStreamer::getCurrentFrameInfo() {
160  if (FrameInfos.empty())
161    return NULL;
162  return &FrameInfos.back();
163}
164
165void MCStreamer::EnsureValidFrame() {
166  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
167  if (!CurFrame || CurFrame->End)
168    report_fatal_error("No open frame");
169}
170
171void MCStreamer::EmitEHSymAttributes(const MCSymbol *Symbol,
172                                     MCSymbol *EHSymbol) {
173}
174
175void MCStreamer::EmitLabel(MCSymbol *Symbol) {
176  assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
177  assert(getCurrentSection() && "Cannot emit before setting section!");
178  Symbol->setSection(*getCurrentSection());
179  LastSymbol = Symbol;
180}
181
182void MCStreamer::EmitDataRegion() {
183  if (RegionIndicator == Data) return;
184
185  MCContext &Context = getContext();
186  const MCAsmInfo &MAI = Context.getAsmInfo();
187  if (!MAI.getSupportsDataRegions()) return;
188
189  // Generate a unique symbol name.
190  MCSymbol *NewSym = Context.GetOrCreateSymbol(MAI.getDataBeginLabelName() +
191                                               Twine(UniqueDataBeginSuffix++));
192  EmitLabel(NewSym);
193
194  RegionIndicator = Data;
195}
196
197void MCStreamer::EmitCodeRegion() {
198  if (RegionIndicator == Code) return;
199
200  MCContext &Context = getContext();
201  const MCAsmInfo &MAI = Context.getAsmInfo();
202  if (!MAI.getSupportsDataRegions()) return;
203
204  // Generate a unique symbol name.
205  MCSymbol *NewSym = Context.GetOrCreateSymbol(MAI.getCodeBeginLabelName() +
206                                               Twine(UniqueCodeBeginSuffix++));
207  EmitLabel(NewSym);
208
209  RegionIndicator = Code;
210}
211
212void MCStreamer::EmitJumpTable8Region() {
213  if (RegionIndicator == JumpTable8) return;
214
215  MCContext &Context = getContext();
216  const MCAsmInfo &MAI = Context.getAsmInfo();
217  if (!MAI.getSupportsDataRegions()) return;
218
219  // Generate a unique symbol name.
220  MCSymbol *NewSym =
221    Context.GetOrCreateSymbol(MAI.getJumpTable8BeginLabelName() +
222                              Twine(UniqueDataBeginSuffix++));
223  EmitLabel(NewSym);
224
225  RegionIndicator = JumpTable8;
226}
227
228void MCStreamer::EmitJumpTable16Region() {
229  if (RegionIndicator == JumpTable16) return;
230
231  MCContext &Context = getContext();
232  const MCAsmInfo &MAI = Context.getAsmInfo();
233  if (!MAI.getSupportsDataRegions()) return;
234
235  // Generate a unique symbol name.
236  MCSymbol *NewSym =
237    Context.GetOrCreateSymbol(MAI.getJumpTable16BeginLabelName() +
238                              Twine(UniqueDataBeginSuffix++));
239  EmitLabel(NewSym);
240
241  RegionIndicator = JumpTable16;
242}
243
244
245void MCStreamer::EmitJumpTable32Region() {
246  if (RegionIndicator == JumpTable32) return;
247
248  MCContext &Context = getContext();
249  const MCAsmInfo &MAI = Context.getAsmInfo();
250  if (!MAI.getSupportsDataRegions()) return;
251
252  // Generate a unique symbol name.
253  MCSymbol *NewSym =
254    Context.GetOrCreateSymbol(MAI.getJumpTable32BeginLabelName() +
255                              Twine(UniqueDataBeginSuffix++));
256  EmitLabel(NewSym);
257
258  RegionIndicator = JumpTable32;
259}
260
261void MCStreamer::EmitCompactUnwindEncoding(uint32_t CompactUnwindEncoding) {
262  EnsureValidFrame();
263  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
264  CurFrame->CompactUnwindEncoding = CompactUnwindEncoding;
265}
266
267void MCStreamer::EmitCFISections(bool EH, bool Debug) {
268  assert(EH || Debug);
269  EmitEHFrame = EH;
270  EmitDebugFrame = Debug;
271}
272
273void MCStreamer::EmitCFIStartProc() {
274  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
275  if (CurFrame && !CurFrame->End)
276    report_fatal_error("Starting a frame before finishing the previous one!");
277
278  MCDwarfFrameInfo Frame;
279  EmitCFIStartProcImpl(Frame);
280
281  FrameInfos.push_back(Frame);
282  RegionIndicator = Code;
283}
284
285void MCStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) {
286}
287
288void MCStreamer::RecordProcStart(MCDwarfFrameInfo &Frame) {
289  Frame.Function = LastSymbol;
290  // If the function is externally visible, we need to create a local
291  // symbol to avoid relocations.
292  StringRef Prefix = getContext().getAsmInfo().getPrivateGlobalPrefix();
293  if (LastSymbol && LastSymbol->getName().startswith(Prefix)) {
294    Frame.Begin = LastSymbol;
295  } else {
296    Frame.Begin = getContext().CreateTempSymbol();
297    EmitLabel(Frame.Begin);
298  }
299}
300
301void MCStreamer::EmitCFIEndProc() {
302  EnsureValidFrame();
303  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
304  EmitCFIEndProcImpl(*CurFrame);
305}
306
307void MCStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
308}
309
310void MCStreamer::RecordProcEnd(MCDwarfFrameInfo &Frame) {
311  Frame.End = getContext().CreateTempSymbol();
312  EmitLabel(Frame.End);
313}
314
315void MCStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) {
316  EnsureValidFrame();
317  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
318  MCSymbol *Label = getContext().CreateTempSymbol();
319  EmitLabel(Label);
320  MachineLocation Dest(MachineLocation::VirtualFP);
321  MachineLocation Source(Register, -Offset);
322  MCCFIInstruction Instruction(Label, Dest, Source);
323  CurFrame->Instructions.push_back(Instruction);
324}
325
326void MCStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
327  EnsureValidFrame();
328  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
329  MCSymbol *Label = getContext().CreateTempSymbol();
330  EmitLabel(Label);
331  MachineLocation Dest(MachineLocation::VirtualFP);
332  MachineLocation Source(MachineLocation::VirtualFP, -Offset);
333  MCCFIInstruction Instruction(Label, Dest, Source);
334  CurFrame->Instructions.push_back(Instruction);
335}
336
337void MCStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) {
338  EnsureValidFrame();
339  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
340  MCSymbol *Label = getContext().CreateTempSymbol();
341  EmitLabel(Label);
342  MachineLocation Dest(MachineLocation::VirtualFP);
343  MachineLocation Source(MachineLocation::VirtualFP, Adjustment);
344  MCCFIInstruction Instruction(MCCFIInstruction::RelMove, Label, Dest, Source);
345  CurFrame->Instructions.push_back(Instruction);
346}
347
348void MCStreamer::EmitCFIDefCfaRegister(int64_t Register) {
349  EnsureValidFrame();
350  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
351  MCSymbol *Label = getContext().CreateTempSymbol();
352  EmitLabel(Label);
353  MachineLocation Dest(Register);
354  MachineLocation Source(MachineLocation::VirtualFP);
355  MCCFIInstruction Instruction(Label, Dest, Source);
356  CurFrame->Instructions.push_back(Instruction);
357}
358
359void MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
360  EnsureValidFrame();
361  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
362  MCSymbol *Label = getContext().CreateTempSymbol();
363  EmitLabel(Label);
364  MachineLocation Dest(Register, Offset);
365  MachineLocation Source(Register, Offset);
366  MCCFIInstruction Instruction(Label, Dest, Source);
367  CurFrame->Instructions.push_back(Instruction);
368}
369
370void MCStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) {
371  EnsureValidFrame();
372  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
373  MCSymbol *Label = getContext().CreateTempSymbol();
374  EmitLabel(Label);
375  MachineLocation Dest(Register, Offset);
376  MachineLocation Source(Register, Offset);
377  MCCFIInstruction Instruction(MCCFIInstruction::RelMove, Label, Dest, Source);
378  CurFrame->Instructions.push_back(Instruction);
379}
380
381void MCStreamer::EmitCFIPersonality(const MCSymbol *Sym,
382                                    unsigned Encoding) {
383  EnsureValidFrame();
384  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
385  CurFrame->Personality = Sym;
386  CurFrame->PersonalityEncoding = Encoding;
387}
388
389void MCStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) {
390  EnsureValidFrame();
391  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
392  CurFrame->Lsda = Sym;
393  CurFrame->LsdaEncoding = Encoding;
394}
395
396void MCStreamer::EmitCFIRememberState() {
397  EnsureValidFrame();
398  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
399  MCSymbol *Label = getContext().CreateTempSymbol();
400  EmitLabel(Label);
401  MCCFIInstruction Instruction(MCCFIInstruction::RememberState, Label);
402  CurFrame->Instructions.push_back(Instruction);
403}
404
405void MCStreamer::EmitCFIRestoreState() {
406  // FIXME: Error if there is no matching cfi_remember_state.
407  EnsureValidFrame();
408  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
409  MCSymbol *Label = getContext().CreateTempSymbol();
410  EmitLabel(Label);
411  MCCFIInstruction Instruction(MCCFIInstruction::RestoreState, Label);
412  CurFrame->Instructions.push_back(Instruction);
413}
414
415void MCStreamer::EmitCFISameValue(int64_t Register) {
416  EnsureValidFrame();
417  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
418  MCSymbol *Label = getContext().CreateTempSymbol();
419  EmitLabel(Label);
420  MCCFIInstruction Instruction(MCCFIInstruction::SameValue, Label, Register);
421  CurFrame->Instructions.push_back(Instruction);
422}
423
424void MCStreamer::EmitCFIRestore(int64_t Register) {
425  EnsureValidFrame();
426  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
427  MCSymbol *Label = getContext().CreateTempSymbol();
428  EmitLabel(Label);
429  MCCFIInstruction Instruction(MCCFIInstruction::Restore, Label, Register);
430  CurFrame->Instructions.push_back(Instruction);
431}
432
433void MCStreamer::EmitCFIEscape(StringRef Values) {
434  EnsureValidFrame();
435  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
436  MCSymbol *Label = getContext().CreateTempSymbol();
437  EmitLabel(Label);
438  MCCFIInstruction Instruction(MCCFIInstruction::Escape, Label, Values);
439  CurFrame->Instructions.push_back(Instruction);
440}
441
442void MCStreamer::EmitCFISignalFrame() {
443  EnsureValidFrame();
444  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
445  CurFrame->IsSignalFrame = true;
446}
447
448void MCStreamer::setCurrentW64UnwindInfo(MCWin64EHUnwindInfo *Frame) {
449  W64UnwindInfos.push_back(Frame);
450  CurrentW64UnwindInfo = W64UnwindInfos.back();
451}
452
453void MCStreamer::EnsureValidW64UnwindInfo() {
454  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
455  if (!CurFrame || CurFrame->End)
456    report_fatal_error("No open Win64 EH frame function!");
457}
458
459void MCStreamer::EmitWin64EHStartProc(const MCSymbol *Symbol) {
460  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
461  if (CurFrame && !CurFrame->End)
462    report_fatal_error("Starting a function before ending the previous one!");
463  MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo;
464  Frame->Begin = getContext().CreateTempSymbol();
465  Frame->Function = Symbol;
466  EmitLabel(Frame->Begin);
467  setCurrentW64UnwindInfo(Frame);
468}
469
470void MCStreamer::EmitWin64EHEndProc() {
471  EnsureValidW64UnwindInfo();
472  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
473  if (CurFrame->ChainedParent)
474    report_fatal_error("Not all chained regions terminated!");
475  CurFrame->End = getContext().CreateTempSymbol();
476  EmitLabel(CurFrame->End);
477}
478
479void MCStreamer::EmitWin64EHStartChained() {
480  EnsureValidW64UnwindInfo();
481  MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo;
482  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
483  Frame->Begin = getContext().CreateTempSymbol();
484  Frame->Function = CurFrame->Function;
485  Frame->ChainedParent = CurFrame;
486  EmitLabel(Frame->Begin);
487  setCurrentW64UnwindInfo(Frame);
488}
489
490void MCStreamer::EmitWin64EHEndChained() {
491  EnsureValidW64UnwindInfo();
492  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
493  if (!CurFrame->ChainedParent)
494    report_fatal_error("End of a chained region outside a chained region!");
495  CurFrame->End = getContext().CreateTempSymbol();
496  EmitLabel(CurFrame->End);
497  CurrentW64UnwindInfo = CurFrame->ChainedParent;
498}
499
500void MCStreamer::EmitWin64EHHandler(const MCSymbol *Sym, bool Unwind,
501                                    bool Except) {
502  EnsureValidW64UnwindInfo();
503  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
504  if (CurFrame->ChainedParent)
505    report_fatal_error("Chained unwind areas can't have handlers!");
506  CurFrame->ExceptionHandler = Sym;
507  if (!Except && !Unwind)
508    report_fatal_error("Don't know what kind of handler this is!");
509  if (Unwind)
510    CurFrame->HandlesUnwind = true;
511  if (Except)
512    CurFrame->HandlesExceptions = true;
513}
514
515void MCStreamer::EmitWin64EHHandlerData() {
516  EnsureValidW64UnwindInfo();
517  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
518  if (CurFrame->ChainedParent)
519    report_fatal_error("Chained unwind areas can't have handlers!");
520}
521
522void MCStreamer::EmitWin64EHPushReg(unsigned Register) {
523  EnsureValidW64UnwindInfo();
524  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
525  MCSymbol *Label = getContext().CreateTempSymbol();
526  MCWin64EHInstruction Inst(Win64EH::UOP_PushNonVol, Label, Register);
527  EmitLabel(Label);
528  CurFrame->Instructions.push_back(Inst);
529}
530
531void MCStreamer::EmitWin64EHSetFrame(unsigned Register, unsigned Offset) {
532  EnsureValidW64UnwindInfo();
533  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
534  if (CurFrame->LastFrameInst >= 0)
535    report_fatal_error("Frame register and offset already specified!");
536  if (Offset & 0x0F)
537    report_fatal_error("Misaligned frame pointer offset!");
538  MCWin64EHInstruction Inst(Win64EH::UOP_SetFPReg, NULL, Register, Offset);
539  CurFrame->LastFrameInst = CurFrame->Instructions.size();
540  CurFrame->Instructions.push_back(Inst);
541}
542
543void MCStreamer::EmitWin64EHAllocStack(unsigned Size) {
544  EnsureValidW64UnwindInfo();
545  if (Size & 7)
546    report_fatal_error("Misaligned stack allocation!");
547  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
548  MCSymbol *Label = getContext().CreateTempSymbol();
549  MCWin64EHInstruction Inst(Label, Size);
550  EmitLabel(Label);
551  CurFrame->Instructions.push_back(Inst);
552}
553
554void MCStreamer::EmitWin64EHSaveReg(unsigned Register, unsigned Offset) {
555  EnsureValidW64UnwindInfo();
556  if (Offset & 7)
557    report_fatal_error("Misaligned saved register offset!");
558  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
559  MCSymbol *Label = getContext().CreateTempSymbol();
560  MCWin64EHInstruction Inst(
561     Offset > 512*1024-8 ? Win64EH::UOP_SaveNonVolBig : Win64EH::UOP_SaveNonVol,
562                            Label, Register, Offset);
563  EmitLabel(Label);
564  CurFrame->Instructions.push_back(Inst);
565}
566
567void MCStreamer::EmitWin64EHSaveXMM(unsigned Register, unsigned Offset) {
568  EnsureValidW64UnwindInfo();
569  if (Offset & 0x0F)
570    report_fatal_error("Misaligned saved vector register offset!");
571  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
572  MCSymbol *Label = getContext().CreateTempSymbol();
573  MCWin64EHInstruction Inst(
574    Offset > 512*1024-16 ? Win64EH::UOP_SaveXMM128Big : Win64EH::UOP_SaveXMM128,
575                            Label, Register, Offset);
576  EmitLabel(Label);
577  CurFrame->Instructions.push_back(Inst);
578}
579
580void MCStreamer::EmitWin64EHPushFrame(bool Code) {
581  EnsureValidW64UnwindInfo();
582  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
583  if (CurFrame->Instructions.size() > 0)
584    report_fatal_error("If present, PushMachFrame must be the first UOP");
585  MCSymbol *Label = getContext().CreateTempSymbol();
586  MCWin64EHInstruction Inst(Win64EH::UOP_PushMachFrame, Label, Code);
587  EmitLabel(Label);
588  CurFrame->Instructions.push_back(Inst);
589}
590
591void MCStreamer::EmitWin64EHEndProlog() {
592  EnsureValidW64UnwindInfo();
593  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
594  CurFrame->PrologEnd = getContext().CreateTempSymbol();
595  EmitLabel(CurFrame->PrologEnd);
596}
597
598void MCStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
599  assert(0 && "This file format doesn't support this directive");
600}
601
602void MCStreamer::EmitFnStart() {
603  errs() << "Not implemented yet\n";
604  abort();
605}
606
607void MCStreamer::EmitFnEnd() {
608  errs() << "Not implemented yet\n";
609  abort();
610}
611
612void MCStreamer::EmitCantUnwind() {
613  errs() << "Not implemented yet\n";
614  abort();
615}
616
617void MCStreamer::EmitHandlerData() {
618  errs() << "Not implemented yet\n";
619  abort();
620}
621
622void MCStreamer::EmitPersonality(const MCSymbol *Personality) {
623  errs() << "Not implemented yet\n";
624  abort();
625}
626
627void MCStreamer::EmitSetFP(unsigned FpReg, unsigned SpReg, int64_t Offset) {
628  errs() << "Not implemented yet\n";
629  abort();
630}
631
632void MCStreamer::EmitPad(int64_t Offset) {
633  errs() << "Not implemented yet\n";
634  abort();
635}
636
637void MCStreamer::EmitRegSave(const SmallVectorImpl<unsigned> &RegList, bool) {
638  errs() << "Not implemented yet\n";
639  abort();
640}
641
642/// EmitRawText - If this file is backed by an assembly streamer, this dumps
643/// the specified string in the output .s file.  This capability is
644/// indicated by the hasRawTextSupport() predicate.
645void MCStreamer::EmitRawText(StringRef String) {
646  errs() << "EmitRawText called on an MCStreamer that doesn't support it, "
647  " something must not be fully mc'ized\n";
648  abort();
649}
650
651void MCStreamer::EmitRawText(const Twine &T) {
652  SmallString<128> Str;
653  T.toVector(Str);
654  EmitRawText(Str.str());
655}
656
657void MCStreamer::EmitFrames(bool usingCFI) {
658  if (!getNumFrameInfos())
659    return;
660
661  if (EmitEHFrame)
662    MCDwarfFrameEmitter::Emit(*this, usingCFI, true);
663
664  if (EmitDebugFrame)
665    MCDwarfFrameEmitter::Emit(*this, usingCFI, false);
666}
667
668void MCStreamer::EmitW64Tables() {
669  if (!getNumW64UnwindInfos())
670    return;
671
672  MCWin64EHUnwindEmitter::Emit(*this);
673}
674
675void MCStreamer::Finish() {
676  if (!FrameInfos.empty() && !FrameInfos.back().End)
677    report_fatal_error("Unfinished frame!");
678
679  FinishImpl();
680}
681