MCStreamer.cpp revision c8fec7e21f5c24303eab8a8592f3b8faff347d86 
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/Support/LEB128.h"
19#include "llvm/ADT/SmallString.h"
20#include "llvm/ADT/Twine.h"
21#include <cstdlib>
22using namespace llvm;
23
24MCStreamer::MCStreamer(MCContext &Ctx)
25  : Context(Ctx), EmitEHFrame(true), EmitDebugFrame(false),
26    CurrentW64UnwindInfo(0), LastSymbol(0) {
27  const MCSection *section = NULL;
28  SectionStack.push_back(std::make_pair(section, section));
29}
30
31MCStreamer::~MCStreamer() {
32  for (unsigned i = 0; i < getNumW64UnwindInfos(); ++i)
33    delete W64UnwindInfos[i];
34}
35
36const MCExpr *MCStreamer::BuildSymbolDiff(MCContext &Context,
37                                          const MCSymbol *A,
38                                          const MCSymbol *B) {
39  MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
40  const MCExpr *ARef =
41    MCSymbolRefExpr::Create(A, Variant, Context);
42  const MCExpr *BRef =
43    MCSymbolRefExpr::Create(B, Variant, Context);
44  const MCExpr *AddrDelta =
45    MCBinaryExpr::Create(MCBinaryExpr::Sub, ARef, BRef, Context);
46  return AddrDelta;
47}
48
49const MCExpr *MCStreamer::ForceExpAbs(const MCExpr* Expr) {
50  if (Context.getAsmInfo().hasAggressiveSymbolFolding() ||
51      isa<MCSymbolRefExpr>(Expr))
52    return Expr;
53
54  MCSymbol *ABS = Context.CreateTempSymbol();
55  EmitAssignment(ABS, Expr);
56  return MCSymbolRefExpr::Create(ABS, Context);
57}
58
59raw_ostream &MCStreamer::GetCommentOS() {
60  // By default, discard comments.
61  return nulls();
62}
63
64void MCStreamer::EmitDwarfSetLineAddr(int64_t LineDelta,
65                                      const MCSymbol *Label, int PointerSize) {
66  // emit the sequence to set the address
67  EmitIntValue(dwarf::DW_LNS_extended_op, 1);
68  EmitULEB128IntValue(PointerSize + 1);
69  EmitIntValue(dwarf::DW_LNE_set_address, 1);
70  EmitSymbolValue(Label, PointerSize);
71
72  // emit the sequence for the LineDelta (from 1) and a zero address delta.
73  MCDwarfLineAddr::Emit(this, LineDelta, 0);
74}
75
76/// EmitIntValue - Special case of EmitValue that avoids the client having to
77/// pass in a MCExpr for constant integers.
78void MCStreamer::EmitIntValue(uint64_t Value, unsigned Size,
79                              unsigned AddrSpace) {
80  assert(Size <= 8 && "Invalid size");
81  assert((isUIntN(8 * Size, Value) || isIntN(8 * Size, Value)) &&
82         "Invalid size");
83  char buf[8];
84  const bool isLittleEndian = Context.getAsmInfo().isLittleEndian();
85  for (unsigned i = 0; i != Size; ++i) {
86    unsigned index = isLittleEndian ? i : (Size - i - 1);
87    buf[i] = uint8_t(Value >> (index * 8));
88  }
89  EmitBytes(StringRef(buf, Size), AddrSpace);
90}
91
92/// EmitULEB128Value - Special case of EmitULEB128Value that avoids the
93/// client having to pass in a MCExpr for constant integers.
94void MCStreamer::EmitULEB128IntValue(uint64_t Value, unsigned AddrSpace,
95                                     unsigned Padding) {
96  SmallString<128> Tmp;
97  raw_svector_ostream OSE(Tmp);
98  encodeULEB128(Value, OSE, Padding);
99  EmitBytes(OSE.str(), AddrSpace);
100}
101
102/// EmitSLEB128Value - Special case of EmitSLEB128Value that avoids the
103/// client having to pass in a MCExpr for constant integers.
104void MCStreamer::EmitSLEB128IntValue(int64_t Value, unsigned AddrSpace) {
105  SmallString<128> Tmp;
106  raw_svector_ostream OSE(Tmp);
107  encodeSLEB128(Value, OSE);
108  EmitBytes(OSE.str(), AddrSpace);
109}
110
111void MCStreamer::EmitAbsValue(const MCExpr *Value, unsigned Size,
112                              unsigned AddrSpace) {
113  const MCExpr *ABS = ForceExpAbs(Value);
114  EmitValue(ABS, Size, AddrSpace);
115}
116
117
118void MCStreamer::EmitValue(const MCExpr *Value, unsigned Size,
119                           unsigned AddrSpace) {
120  EmitValueImpl(Value, Size, AddrSpace);
121}
122
123void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size,
124                                  unsigned AddrSpace) {
125  EmitValueImpl(MCSymbolRefExpr::Create(Sym, getContext()), Size,
126                AddrSpace);
127}
128
129void MCStreamer::EmitGPRel64Value(const MCExpr *Value) {
130  report_fatal_error("unsupported directive in streamer");
131}
132
133void MCStreamer::EmitGPRel32Value(const MCExpr *Value) {
134  report_fatal_error("unsupported directive in streamer");
135}
136
137/// EmitFill - Emit NumBytes bytes worth of the value specified by
138/// FillValue.  This implements directives such as '.space'.
139void MCStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue,
140                          unsigned AddrSpace) {
141  const MCExpr *E = MCConstantExpr::Create(FillValue, getContext());
142  for (uint64_t i = 0, e = NumBytes; i != e; ++i)
143    EmitValue(E, 1, AddrSpace);
144}
145
146bool MCStreamer::EmitDwarfFileDirective(unsigned FileNo,
147                                        StringRef Directory,
148                                        StringRef Filename) {
149  return getContext().GetDwarfFile(Directory, Filename, FileNo) == 0;
150}
151
152void MCStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
153                                       unsigned Column, unsigned Flags,
154                                       unsigned Isa,
155                                       unsigned Discriminator,
156                                       StringRef FileName) {
157  getContext().setCurrentDwarfLoc(FileNo, Line, Column, Flags, Isa,
158                                  Discriminator);
159}
160
161MCDwarfFrameInfo *MCStreamer::getCurrentFrameInfo() {
162  if (FrameInfos.empty())
163    return NULL;
164  return &FrameInfos.back();
165}
166
167void MCStreamer::EnsureValidFrame() {
168  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
169  if (!CurFrame || CurFrame->End)
170    report_fatal_error("No open frame");
171}
172
173void MCStreamer::EmitEHSymAttributes(const MCSymbol *Symbol,
174                                     MCSymbol *EHSymbol) {
175}
176
177void MCStreamer::EmitLabel(MCSymbol *Symbol) {
178  assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
179  assert(getCurrentSection() && "Cannot emit before setting section!");
180  Symbol->setSection(*getCurrentSection());
181  LastSymbol = Symbol;
182}
183
184void MCStreamer::EmitCompactUnwindEncoding(uint32_t CompactUnwindEncoding) {
185  EnsureValidFrame();
186  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
187  CurFrame->CompactUnwindEncoding = CompactUnwindEncoding;
188}
189
190void MCStreamer::EmitCFISections(bool EH, bool Debug) {
191  assert(EH || Debug);
192  EmitEHFrame = EH;
193  EmitDebugFrame = Debug;
194}
195
196void MCStreamer::EmitCFIStartProc() {
197  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
198  if (CurFrame && !CurFrame->End)
199    report_fatal_error("Starting a frame before finishing the previous one!");
200
201  MCDwarfFrameInfo Frame;
202  EmitCFIStartProcImpl(Frame);
203
204  FrameInfos.push_back(Frame);
205}
206
207void MCStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) {
208}
209
210void MCStreamer::RecordProcStart(MCDwarfFrameInfo &Frame) {
211  Frame.Function = LastSymbol;
212  // If the function is externally visible, we need to create a local
213  // symbol to avoid relocations.
214  StringRef Prefix = getContext().getAsmInfo().getPrivateGlobalPrefix();
215  if (LastSymbol && LastSymbol->getName().startswith(Prefix)) {
216    Frame.Begin = LastSymbol;
217  } else {
218    Frame.Begin = getContext().CreateTempSymbol();
219    EmitLabel(Frame.Begin);
220  }
221}
222
223void MCStreamer::EmitCFIEndProc() {
224  EnsureValidFrame();
225  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
226  EmitCFIEndProcImpl(*CurFrame);
227}
228
229void MCStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
230}
231
232void MCStreamer::RecordProcEnd(MCDwarfFrameInfo &Frame) {
233  Frame.End = getContext().CreateTempSymbol();
234  EmitLabel(Frame.End);
235}
236
237void MCStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) {
238  EnsureValidFrame();
239  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
240  MCSymbol *Label = getContext().CreateTempSymbol();
241  EmitLabel(Label);
242  MachineLocation Dest(MachineLocation::VirtualFP);
243  MachineLocation Source(Register, -Offset);
244  MCCFIInstruction Instruction(Label, Dest, Source);
245  CurFrame->Instructions.push_back(Instruction);
246}
247
248void MCStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
249  EnsureValidFrame();
250  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
251  MCSymbol *Label = getContext().CreateTempSymbol();
252  EmitLabel(Label);
253  MachineLocation Dest(MachineLocation::VirtualFP);
254  MachineLocation Source(MachineLocation::VirtualFP, -Offset);
255  MCCFIInstruction Instruction(Label, Dest, Source);
256  CurFrame->Instructions.push_back(Instruction);
257}
258
259void MCStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) {
260  EnsureValidFrame();
261  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
262  MCSymbol *Label = getContext().CreateTempSymbol();
263  EmitLabel(Label);
264  MachineLocation Dest(MachineLocation::VirtualFP);
265  MachineLocation Source(MachineLocation::VirtualFP, Adjustment);
266  MCCFIInstruction Instruction(MCCFIInstruction::RelMove, Label, Dest, Source);
267  CurFrame->Instructions.push_back(Instruction);
268}
269
270void MCStreamer::EmitCFIDefCfaRegister(int64_t Register) {
271  EnsureValidFrame();
272  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
273  MCSymbol *Label = getContext().CreateTempSymbol();
274  EmitLabel(Label);
275  MachineLocation Dest(Register);
276  MachineLocation Source(MachineLocation::VirtualFP);
277  MCCFIInstruction Instruction(Label, Dest, Source);
278  CurFrame->Instructions.push_back(Instruction);
279}
280
281void MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
282  EnsureValidFrame();
283  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
284  MCSymbol *Label = getContext().CreateTempSymbol();
285  EmitLabel(Label);
286  MachineLocation Dest(Register, Offset);
287  MachineLocation Source(Register, Offset);
288  MCCFIInstruction Instruction(Label, Dest, Source);
289  CurFrame->Instructions.push_back(Instruction);
290}
291
292void MCStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) {
293  EnsureValidFrame();
294  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
295  MCSymbol *Label = getContext().CreateTempSymbol();
296  EmitLabel(Label);
297  MachineLocation Dest(Register, Offset);
298  MachineLocation Source(Register, Offset);
299  MCCFIInstruction Instruction(MCCFIInstruction::RelMove, Label, Dest, Source);
300  CurFrame->Instructions.push_back(Instruction);
301}
302
303void MCStreamer::EmitCFIPersonality(const MCSymbol *Sym,
304                                    unsigned Encoding) {
305  EnsureValidFrame();
306  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
307  CurFrame->Personality = Sym;
308  CurFrame->PersonalityEncoding = Encoding;
309}
310
311void MCStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) {
312  EnsureValidFrame();
313  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
314  CurFrame->Lsda = Sym;
315  CurFrame->LsdaEncoding = Encoding;
316}
317
318void MCStreamer::EmitCFIRememberState() {
319  EnsureValidFrame();
320  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
321  MCSymbol *Label = getContext().CreateTempSymbol();
322  EmitLabel(Label);
323  MCCFIInstruction Instruction(MCCFIInstruction::RememberState, Label);
324  CurFrame->Instructions.push_back(Instruction);
325}
326
327void MCStreamer::EmitCFIRestoreState() {
328  // FIXME: Error if there is no matching cfi_remember_state.
329  EnsureValidFrame();
330  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
331  MCSymbol *Label = getContext().CreateTempSymbol();
332  EmitLabel(Label);
333  MCCFIInstruction Instruction(MCCFIInstruction::RestoreState, Label);
334  CurFrame->Instructions.push_back(Instruction);
335}
336
337void MCStreamer::EmitCFISameValue(int64_t Register) {
338  EnsureValidFrame();
339  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
340  MCSymbol *Label = getContext().CreateTempSymbol();
341  EmitLabel(Label);
342  MCCFIInstruction Instruction(MCCFIInstruction::SameValue, Label, Register);
343  CurFrame->Instructions.push_back(Instruction);
344}
345
346void MCStreamer::EmitCFIRestore(int64_t Register) {
347  EnsureValidFrame();
348  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
349  MCSymbol *Label = getContext().CreateTempSymbol();
350  EmitLabel(Label);
351  MCCFIInstruction Instruction(MCCFIInstruction::Restore, Label, Register);
352  CurFrame->Instructions.push_back(Instruction);
353}
354
355void MCStreamer::EmitCFIEscape(StringRef Values) {
356  EnsureValidFrame();
357  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
358  MCSymbol *Label = getContext().CreateTempSymbol();
359  EmitLabel(Label);
360  MCCFIInstruction Instruction(MCCFIInstruction::Escape, Label, Values);
361  CurFrame->Instructions.push_back(Instruction);
362}
363
364void MCStreamer::EmitCFISignalFrame() {
365  EnsureValidFrame();
366  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
367  CurFrame->IsSignalFrame = true;
368}
369
370void MCStreamer::EmitCFIUndefined(int64_t Register) {
371  EnsureValidFrame();
372  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
373  MCSymbol *Label = getContext().CreateTempSymbol();
374  EmitLabel(Label);
375  MCCFIInstruction Instruction(MCCFIInstruction::Undefined, Label, Register);
376  CurFrame->Instructions.push_back(Instruction);
377}
378
379void MCStreamer::setCurrentW64UnwindInfo(MCWin64EHUnwindInfo *Frame) {
380  W64UnwindInfos.push_back(Frame);
381  CurrentW64UnwindInfo = W64UnwindInfos.back();
382}
383
384void MCStreamer::EnsureValidW64UnwindInfo() {
385  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
386  if (!CurFrame || CurFrame->End)
387    report_fatal_error("No open Win64 EH frame function!");
388}
389
390void MCStreamer::EmitWin64EHStartProc(const MCSymbol *Symbol) {
391  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
392  if (CurFrame && !CurFrame->End)
393    report_fatal_error("Starting a function before ending the previous one!");
394  MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo;
395  Frame->Begin = getContext().CreateTempSymbol();
396  Frame->Function = Symbol;
397  EmitLabel(Frame->Begin);
398  setCurrentW64UnwindInfo(Frame);
399}
400
401void MCStreamer::EmitWin64EHEndProc() {
402  EnsureValidW64UnwindInfo();
403  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
404  if (CurFrame->ChainedParent)
405    report_fatal_error("Not all chained regions terminated!");
406  CurFrame->End = getContext().CreateTempSymbol();
407  EmitLabel(CurFrame->End);
408}
409
410void MCStreamer::EmitWin64EHStartChained() {
411  EnsureValidW64UnwindInfo();
412  MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo;
413  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
414  Frame->Begin = getContext().CreateTempSymbol();
415  Frame->Function = CurFrame->Function;
416  Frame->ChainedParent = CurFrame;
417  EmitLabel(Frame->Begin);
418  setCurrentW64UnwindInfo(Frame);
419}
420
421void MCStreamer::EmitWin64EHEndChained() {
422  EnsureValidW64UnwindInfo();
423  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
424  if (!CurFrame->ChainedParent)
425    report_fatal_error("End of a chained region outside a chained region!");
426  CurFrame->End = getContext().CreateTempSymbol();
427  EmitLabel(CurFrame->End);
428  CurrentW64UnwindInfo = CurFrame->ChainedParent;
429}
430
431void MCStreamer::EmitWin64EHHandler(const MCSymbol *Sym, bool Unwind,
432                                    bool Except) {
433  EnsureValidW64UnwindInfo();
434  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
435  if (CurFrame->ChainedParent)
436    report_fatal_error("Chained unwind areas can't have handlers!");
437  CurFrame->ExceptionHandler = Sym;
438  if (!Except && !Unwind)
439    report_fatal_error("Don't know what kind of handler this is!");
440  if (Unwind)
441    CurFrame->HandlesUnwind = true;
442  if (Except)
443    CurFrame->HandlesExceptions = true;
444}
445
446void MCStreamer::EmitWin64EHHandlerData() {
447  EnsureValidW64UnwindInfo();
448  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
449  if (CurFrame->ChainedParent)
450    report_fatal_error("Chained unwind areas can't have handlers!");
451}
452
453void MCStreamer::EmitWin64EHPushReg(unsigned Register) {
454  EnsureValidW64UnwindInfo();
455  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
456  MCSymbol *Label = getContext().CreateTempSymbol();
457  MCWin64EHInstruction Inst(Win64EH::UOP_PushNonVol, Label, Register);
458  EmitLabel(Label);
459  CurFrame->Instructions.push_back(Inst);
460}
461
462void MCStreamer::EmitWin64EHSetFrame(unsigned Register, unsigned Offset) {
463  EnsureValidW64UnwindInfo();
464  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
465  if (CurFrame->LastFrameInst >= 0)
466    report_fatal_error("Frame register and offset already specified!");
467  if (Offset & 0x0F)
468    report_fatal_error("Misaligned frame pointer offset!");
469  MCWin64EHInstruction Inst(Win64EH::UOP_SetFPReg, NULL, Register, Offset);
470  CurFrame->LastFrameInst = CurFrame->Instructions.size();
471  CurFrame->Instructions.push_back(Inst);
472}
473
474void MCStreamer::EmitWin64EHAllocStack(unsigned Size) {
475  EnsureValidW64UnwindInfo();
476  if (Size & 7)
477    report_fatal_error("Misaligned stack allocation!");
478  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
479  MCSymbol *Label = getContext().CreateTempSymbol();
480  MCWin64EHInstruction Inst(Label, Size);
481  EmitLabel(Label);
482  CurFrame->Instructions.push_back(Inst);
483}
484
485void MCStreamer::EmitWin64EHSaveReg(unsigned Register, unsigned Offset) {
486  EnsureValidW64UnwindInfo();
487  if (Offset & 7)
488    report_fatal_error("Misaligned saved register offset!");
489  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
490  MCSymbol *Label = getContext().CreateTempSymbol();
491  MCWin64EHInstruction Inst(
492     Offset > 512*1024-8 ? Win64EH::UOP_SaveNonVolBig : Win64EH::UOP_SaveNonVol,
493                            Label, Register, Offset);
494  EmitLabel(Label);
495  CurFrame->Instructions.push_back(Inst);
496}
497
498void MCStreamer::EmitWin64EHSaveXMM(unsigned Register, unsigned Offset) {
499  EnsureValidW64UnwindInfo();
500  if (Offset & 0x0F)
501    report_fatal_error("Misaligned saved vector register offset!");
502  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
503  MCSymbol *Label = getContext().CreateTempSymbol();
504  MCWin64EHInstruction Inst(
505    Offset > 512*1024-16 ? Win64EH::UOP_SaveXMM128Big : Win64EH::UOP_SaveXMM128,
506                            Label, Register, Offset);
507  EmitLabel(Label);
508  CurFrame->Instructions.push_back(Inst);
509}
510
511void MCStreamer::EmitWin64EHPushFrame(bool Code) {
512  EnsureValidW64UnwindInfo();
513  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
514  if (CurFrame->Instructions.size() > 0)
515    report_fatal_error("If present, PushMachFrame must be the first UOP");
516  MCSymbol *Label = getContext().CreateTempSymbol();
517  MCWin64EHInstruction Inst(Win64EH::UOP_PushMachFrame, Label, Code);
518  EmitLabel(Label);
519  CurFrame->Instructions.push_back(Inst);
520}
521
522void MCStreamer::EmitWin64EHEndProlog() {
523  EnsureValidW64UnwindInfo();
524  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
525  CurFrame->PrologEnd = getContext().CreateTempSymbol();
526  EmitLabel(CurFrame->PrologEnd);
527}
528
529void MCStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
530  llvm_unreachable("This file format doesn't support this directive");
531}
532
533void MCStreamer::EmitFnStart() {
534  errs() << "Not implemented yet\n";
535  abort();
536}
537
538void MCStreamer::EmitFnEnd() {
539  errs() << "Not implemented yet\n";
540  abort();
541}
542
543void MCStreamer::EmitCantUnwind() {
544  errs() << "Not implemented yet\n";
545  abort();
546}
547
548void MCStreamer::EmitHandlerData() {
549  errs() << "Not implemented yet\n";
550  abort();
551}
552
553void MCStreamer::EmitPersonality(const MCSymbol *Personality) {
554  errs() << "Not implemented yet\n";
555  abort();
556}
557
558void MCStreamer::EmitSetFP(unsigned FpReg, unsigned SpReg, int64_t Offset) {
559  errs() << "Not implemented yet\n";
560  abort();
561}
562
563void MCStreamer::EmitPad(int64_t Offset) {
564  errs() << "Not implemented yet\n";
565  abort();
566}
567
568void MCStreamer::EmitRegSave(const SmallVectorImpl<unsigned> &RegList, bool) {
569  errs() << "Not implemented yet\n";
570  abort();
571}
572
573void MCStreamer::EmitTCEntry(const MCSymbol &S) {
574  llvm_unreachable("Unsupported method");
575}
576
577/// EmitRawText - If this file is backed by an assembly streamer, this dumps
578/// the specified string in the output .s file.  This capability is
579/// indicated by the hasRawTextSupport() predicate.
580void MCStreamer::EmitRawText(StringRef String) {
581  errs() << "EmitRawText called on an MCStreamer that doesn't support it, "
582  " something must not be fully mc'ized\n";
583  abort();
584}
585
586void MCStreamer::EmitRawText(const Twine &T) {
587  SmallString<128> Str;
588  T.toVector(Str);
589  EmitRawText(Str.str());
590}
591
592void MCStreamer::EmitFrames(bool usingCFI) {
593  if (!getNumFrameInfos())
594    return;
595
596  if (EmitEHFrame)
597    MCDwarfFrameEmitter::Emit(*this, usingCFI, true);
598
599  if (EmitDebugFrame)
600    MCDwarfFrameEmitter::Emit(*this, usingCFI, false);
601}
602
603void MCStreamer::EmitW64Tables() {
604  if (!getNumW64UnwindInfos())
605    return;
606
607  MCWin64EHUnwindEmitter::Emit(*this);
608}
609
610void MCStreamer::Finish() {
611  if (!FrameInfos.empty() && !FrameInfos.back().End)
612    report_fatal_error("Unfinished frame!");
613
614  FinishImpl();
615}
616