MCStreamer.cpp revision 8cb6b971601d42a27e40f0f1d4828671441989f5 
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/MCStreamer.h"
11#include "llvm/ADT/SmallString.h"
12#include "llvm/ADT/Twine.h"
13#include "llvm/MC/MCAsmInfo.h"
14#include "llvm/MC/MCContext.h"
15#include "llvm/MC/MCExpr.h"
16#include "llvm/MC/MCObjectWriter.h"
17#include "llvm/MC/MCSymbol.h"
18#include "llvm/Support/ErrorHandling.h"
19#include "llvm/Support/LEB128.h"
20#include "llvm/Support/raw_ostream.h"
21#include <cstdlib>
22using namespace llvm;
23
24MCStreamer::MCStreamer(StreamerKind Kind, MCContext &Ctx)
25    : Kind(Kind), Context(Ctx), EmitEHFrame(true), EmitDebugFrame(false),
26      CurrentW64UnwindInfo(0), LastSymbol(0), AutoInitSections(false) {
27  SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
28}
29
30MCStreamer::~MCStreamer() {
31  for (unsigned i = 0; i < getNumW64UnwindInfos(); ++i)
32    delete W64UnwindInfos[i];
33}
34
35void MCStreamer::reset() {
36  for (unsigned i = 0; i < getNumW64UnwindInfos(); ++i)
37    delete W64UnwindInfos[i];
38  W64UnwindInfos.clear();
39  EmitEHFrame = true;
40  EmitDebugFrame = false;
41  CurrentW64UnwindInfo = 0;
42  LastSymbol = 0;
43  SectionStack.clear();
44  SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
45}
46
47const MCExpr *MCStreamer::BuildSymbolDiff(MCContext &Context,
48                                          const MCSymbol *A,
49                                          const MCSymbol *B) {
50  MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
51  const MCExpr *ARef =
52    MCSymbolRefExpr::Create(A, Variant, Context);
53  const MCExpr *BRef =
54    MCSymbolRefExpr::Create(B, Variant, Context);
55  const MCExpr *AddrDelta =
56    MCBinaryExpr::Create(MCBinaryExpr::Sub, ARef, BRef, Context);
57  return AddrDelta;
58}
59
60const MCExpr *MCStreamer::ForceExpAbs(const MCExpr* Expr) {
61  if (Context.getAsmInfo().hasAggressiveSymbolFolding() ||
62      isa<MCSymbolRefExpr>(Expr))
63    return Expr;
64
65  MCSymbol *ABS = Context.CreateTempSymbol();
66  EmitAssignment(ABS, Expr);
67  return MCSymbolRefExpr::Create(ABS, Context);
68}
69
70raw_ostream &MCStreamer::GetCommentOS() {
71  // By default, discard comments.
72  return nulls();
73}
74
75void MCStreamer::EmitDwarfSetLineAddr(int64_t LineDelta,
76                                      const MCSymbol *Label, int PointerSize) {
77  // emit the sequence to set the address
78  EmitIntValue(dwarf::DW_LNS_extended_op, 1);
79  EmitULEB128IntValue(PointerSize + 1);
80  EmitIntValue(dwarf::DW_LNE_set_address, 1);
81  EmitSymbolValue(Label, PointerSize);
82
83  // emit the sequence for the LineDelta (from 1) and a zero address delta.
84  MCDwarfLineAddr::Emit(this, LineDelta, 0);
85}
86
87/// EmitIntValue - Special case of EmitValue that avoids the client having to
88/// pass in a MCExpr for constant integers.
89void MCStreamer::EmitIntValue(uint64_t Value, unsigned Size,
90                              unsigned AddrSpace) {
91  assert(Size <= 8 && "Invalid size");
92  assert((isUIntN(8 * Size, Value) || isIntN(8 * Size, Value)) &&
93         "Invalid size");
94  char buf[8];
95  const bool isLittleEndian = Context.getAsmInfo().isLittleEndian();
96  for (unsigned i = 0; i != Size; ++i) {
97    unsigned index = isLittleEndian ? i : (Size - i - 1);
98    buf[i] = uint8_t(Value >> (index * 8));
99  }
100  EmitBytes(StringRef(buf, Size), AddrSpace);
101}
102
103/// EmitULEB128Value - Special case of EmitULEB128Value that avoids the
104/// client having to pass in a MCExpr for constant integers.
105void MCStreamer::EmitULEB128IntValue(uint64_t Value, unsigned Padding,
106                                     unsigned AddrSpace) {
107  SmallString<128> Tmp;
108  raw_svector_ostream OSE(Tmp);
109  encodeULEB128(Value, OSE, Padding);
110  EmitBytes(OSE.str(), AddrSpace);
111}
112
113/// EmitSLEB128Value - Special case of EmitSLEB128Value that avoids the
114/// client having to pass in a MCExpr for constant integers.
115void MCStreamer::EmitSLEB128IntValue(int64_t Value, unsigned AddrSpace) {
116  SmallString<128> Tmp;
117  raw_svector_ostream OSE(Tmp);
118  encodeSLEB128(Value, OSE);
119  EmitBytes(OSE.str(), AddrSpace);
120}
121
122void MCStreamer::EmitAbsValue(const MCExpr *Value, unsigned Size,
123                              unsigned AddrSpace) {
124  const MCExpr *ABS = ForceExpAbs(Value);
125  EmitValue(ABS, Size, AddrSpace);
126}
127
128
129void MCStreamer::EmitValue(const MCExpr *Value, unsigned Size,
130                           unsigned AddrSpace) {
131  EmitValueImpl(Value, Size, AddrSpace);
132}
133
134void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size,
135                                  unsigned AddrSpace) {
136  EmitValueImpl(MCSymbolRefExpr::Create(Sym, getContext()), Size,
137                AddrSpace);
138}
139
140void MCStreamer::EmitGPRel64Value(const MCExpr *Value) {
141  report_fatal_error("unsupported directive in streamer");
142}
143
144void MCStreamer::EmitGPRel32Value(const MCExpr *Value) {
145  report_fatal_error("unsupported directive in streamer");
146}
147
148/// EmitFill - Emit NumBytes bytes worth of the value specified by
149/// FillValue.  This implements directives such as '.space'.
150void MCStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue,
151                          unsigned AddrSpace) {
152  const MCExpr *E = MCConstantExpr::Create(FillValue, getContext());
153  for (uint64_t i = 0, e = NumBytes; i != e; ++i)
154    EmitValue(E, 1, AddrSpace);
155}
156
157bool MCStreamer::EmitDwarfFileDirective(unsigned FileNo,
158                                        StringRef Directory,
159                                        StringRef Filename, unsigned CUID) {
160  return getContext().GetDwarfFile(Directory, Filename, FileNo, CUID) == 0;
161}
162
163void MCStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
164                                       unsigned Column, unsigned Flags,
165                                       unsigned Isa,
166                                       unsigned Discriminator,
167                                       StringRef FileName) {
168  getContext().setCurrentDwarfLoc(FileNo, Line, Column, Flags, Isa,
169                                  Discriminator);
170}
171
172MCDwarfFrameInfo *MCStreamer::getCurrentFrameInfo() {
173  if (FrameInfos.empty())
174    return 0;
175  return &FrameInfos.back();
176}
177
178void MCStreamer::EnsureValidFrame() {
179  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
180  if (!CurFrame || CurFrame->End)
181    report_fatal_error("No open frame");
182}
183
184void MCStreamer::EmitEHSymAttributes(const MCSymbol *Symbol,
185                                     MCSymbol *EHSymbol) {
186}
187
188void MCStreamer::EmitLabel(MCSymbol *Symbol) {
189  assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
190  assert(getCurrentSection().first && "Cannot emit before setting section!");
191  Symbol->setSection(*getCurrentSection().first);
192  LastSymbol = Symbol;
193}
194
195void MCStreamer::EmitDebugLabel(MCSymbol *Symbol) {
196  assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
197  assert(getCurrentSection().first && "Cannot emit before setting section!");
198  Symbol->setSection(*getCurrentSection().first);
199  LastSymbol = Symbol;
200}
201
202void MCStreamer::EmitCompactUnwindEncoding(uint32_t CompactUnwindEncoding) {
203  EnsureValidFrame();
204  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
205  CurFrame->CompactUnwindEncoding = CompactUnwindEncoding;
206}
207
208void MCStreamer::EmitCFISections(bool EH, bool Debug) {
209  assert(EH || Debug);
210  EmitEHFrame = EH;
211  EmitDebugFrame = Debug;
212}
213
214void MCStreamer::EmitCFIStartProc() {
215  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
216  if (CurFrame && !CurFrame->End)
217    report_fatal_error("Starting a frame before finishing the previous one!");
218
219  MCDwarfFrameInfo Frame;
220  EmitCFIStartProcImpl(Frame);
221
222  FrameInfos.push_back(Frame);
223}
224
225void MCStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) {
226}
227
228void MCStreamer::RecordProcStart(MCDwarfFrameInfo &Frame) {
229  Frame.Function = LastSymbol;
230  // If the function is externally visible, we need to create a local
231  // symbol to avoid relocations.
232  StringRef Prefix = getContext().getAsmInfo().getPrivateGlobalPrefix();
233  if (LastSymbol && LastSymbol->getName().startswith(Prefix)) {
234    Frame.Begin = LastSymbol;
235  } else {
236    Frame.Begin = getContext().CreateTempSymbol();
237    EmitLabel(Frame.Begin);
238  }
239}
240
241void MCStreamer::EmitCFIEndProc() {
242  EnsureValidFrame();
243  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
244  EmitCFIEndProcImpl(*CurFrame);
245}
246
247void MCStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
248}
249
250void MCStreamer::RecordProcEnd(MCDwarfFrameInfo &Frame) {
251  Frame.End = getContext().CreateTempSymbol();
252  EmitLabel(Frame.End);
253}
254
255MCSymbol *MCStreamer::EmitCFICommon() {
256  EnsureValidFrame();
257  MCSymbol *Label = getContext().CreateTempSymbol();
258  EmitLabel(Label);
259  return Label;
260}
261
262void MCStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) {
263  MCSymbol *Label = EmitCFICommon();
264  MCCFIInstruction Instruction =
265    MCCFIInstruction::createDefCfa(Label, Register, Offset);
266  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
267  CurFrame->Instructions.push_back(Instruction);
268}
269
270void MCStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
271  MCSymbol *Label = EmitCFICommon();
272  MCCFIInstruction Instruction =
273    MCCFIInstruction::createDefCfaOffset(Label, Offset);
274  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
275  CurFrame->Instructions.push_back(Instruction);
276}
277
278void MCStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) {
279  MCSymbol *Label = EmitCFICommon();
280  MCCFIInstruction Instruction =
281    MCCFIInstruction::createAdjustCfaOffset(Label, Adjustment);
282  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
283  CurFrame->Instructions.push_back(Instruction);
284}
285
286void MCStreamer::EmitCFIDefCfaRegister(int64_t Register) {
287  MCSymbol *Label = EmitCFICommon();
288  MCCFIInstruction Instruction =
289    MCCFIInstruction::createDefCfaRegister(Label, Register);
290  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
291  CurFrame->Instructions.push_back(Instruction);
292}
293
294void MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
295  MCSymbol *Label = EmitCFICommon();
296  MCCFIInstruction Instruction =
297    MCCFIInstruction::createOffset(Label, Register, Offset);
298  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
299  CurFrame->Instructions.push_back(Instruction);
300}
301
302void MCStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) {
303  MCSymbol *Label = EmitCFICommon();
304  MCCFIInstruction Instruction =
305    MCCFIInstruction::createRelOffset(Label, Register, Offset);
306  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
307  CurFrame->Instructions.push_back(Instruction);
308}
309
310void MCStreamer::EmitCFIPersonality(const MCSymbol *Sym,
311                                    unsigned Encoding) {
312  EnsureValidFrame();
313  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
314  CurFrame->Personality = Sym;
315  CurFrame->PersonalityEncoding = Encoding;
316}
317
318void MCStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) {
319  EnsureValidFrame();
320  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
321  CurFrame->Lsda = Sym;
322  CurFrame->LsdaEncoding = Encoding;
323}
324
325void MCStreamer::EmitCFIRememberState() {
326  MCSymbol *Label = EmitCFICommon();
327  MCCFIInstruction Instruction = MCCFIInstruction::createRememberState(Label);
328  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
329  CurFrame->Instructions.push_back(Instruction);
330}
331
332void MCStreamer::EmitCFIRestoreState() {
333  // FIXME: Error if there is no matching cfi_remember_state.
334  MCSymbol *Label = EmitCFICommon();
335  MCCFIInstruction Instruction = MCCFIInstruction::createRestoreState(Label);
336  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
337  CurFrame->Instructions.push_back(Instruction);
338}
339
340void MCStreamer::EmitCFISameValue(int64_t Register) {
341  MCSymbol *Label = EmitCFICommon();
342  MCCFIInstruction Instruction =
343    MCCFIInstruction::createSameValue(Label, Register);
344  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
345  CurFrame->Instructions.push_back(Instruction);
346}
347
348void MCStreamer::EmitCFIRestore(int64_t Register) {
349  MCSymbol *Label = EmitCFICommon();
350  MCCFIInstruction Instruction =
351    MCCFIInstruction::createRestore(Label, Register);
352  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
353  CurFrame->Instructions.push_back(Instruction);
354}
355
356void MCStreamer::EmitCFIEscape(StringRef Values) {
357  MCSymbol *Label = EmitCFICommon();
358  MCCFIInstruction Instruction = MCCFIInstruction::createEscape(Label, Values);
359  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
360  CurFrame->Instructions.push_back(Instruction);
361}
362
363void MCStreamer::EmitCFISignalFrame() {
364  EnsureValidFrame();
365  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
366  CurFrame->IsSignalFrame = true;
367}
368
369void MCStreamer::EmitCFIUndefined(int64_t Register) {
370  MCSymbol *Label = EmitCFICommon();
371  MCCFIInstruction Instruction =
372    MCCFIInstruction::createUndefined(Label, Register);
373  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
374  CurFrame->Instructions.push_back(Instruction);
375}
376
377void MCStreamer::EmitCFIRegister(int64_t Register1, int64_t Register2) {
378  MCSymbol *Label = EmitCFICommon();
379  MCCFIInstruction Instruction =
380    MCCFIInstruction::createRegister(Label, Register1, Register2);
381  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
382  CurFrame->Instructions.push_back(Instruction);
383}
384
385void MCStreamer::setCurrentW64UnwindInfo(MCWin64EHUnwindInfo *Frame) {
386  W64UnwindInfos.push_back(Frame);
387  CurrentW64UnwindInfo = W64UnwindInfos.back();
388}
389
390void MCStreamer::EnsureValidW64UnwindInfo() {
391  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
392  if (!CurFrame || CurFrame->End)
393    report_fatal_error("No open Win64 EH frame function!");
394}
395
396void MCStreamer::EmitWin64EHStartProc(const MCSymbol *Symbol) {
397  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
398  if (CurFrame && !CurFrame->End)
399    report_fatal_error("Starting a function before ending the previous one!");
400  MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo;
401  Frame->Begin = getContext().CreateTempSymbol();
402  Frame->Function = Symbol;
403  EmitLabel(Frame->Begin);
404  setCurrentW64UnwindInfo(Frame);
405}
406
407void MCStreamer::EmitWin64EHEndProc() {
408  EnsureValidW64UnwindInfo();
409  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
410  if (CurFrame->ChainedParent)
411    report_fatal_error("Not all chained regions terminated!");
412  CurFrame->End = getContext().CreateTempSymbol();
413  EmitLabel(CurFrame->End);
414}
415
416void MCStreamer::EmitWin64EHStartChained() {
417  EnsureValidW64UnwindInfo();
418  MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo;
419  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
420  Frame->Begin = getContext().CreateTempSymbol();
421  Frame->Function = CurFrame->Function;
422  Frame->ChainedParent = CurFrame;
423  EmitLabel(Frame->Begin);
424  setCurrentW64UnwindInfo(Frame);
425}
426
427void MCStreamer::EmitWin64EHEndChained() {
428  EnsureValidW64UnwindInfo();
429  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
430  if (!CurFrame->ChainedParent)
431    report_fatal_error("End of a chained region outside a chained region!");
432  CurFrame->End = getContext().CreateTempSymbol();
433  EmitLabel(CurFrame->End);
434  CurrentW64UnwindInfo = CurFrame->ChainedParent;
435}
436
437void MCStreamer::EmitWin64EHHandler(const MCSymbol *Sym, bool Unwind,
438                                    bool Except) {
439  EnsureValidW64UnwindInfo();
440  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
441  if (CurFrame->ChainedParent)
442    report_fatal_error("Chained unwind areas can't have handlers!");
443  CurFrame->ExceptionHandler = Sym;
444  if (!Except && !Unwind)
445    report_fatal_error("Don't know what kind of handler this is!");
446  if (Unwind)
447    CurFrame->HandlesUnwind = true;
448  if (Except)
449    CurFrame->HandlesExceptions = true;
450}
451
452void MCStreamer::EmitWin64EHHandlerData() {
453  EnsureValidW64UnwindInfo();
454  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
455  if (CurFrame->ChainedParent)
456    report_fatal_error("Chained unwind areas can't have handlers!");
457}
458
459void MCStreamer::EmitWin64EHPushReg(unsigned Register) {
460  EnsureValidW64UnwindInfo();
461  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
462  MCSymbol *Label = getContext().CreateTempSymbol();
463  MCWin64EHInstruction Inst(Win64EH::UOP_PushNonVol, Label, Register);
464  EmitLabel(Label);
465  CurFrame->Instructions.push_back(Inst);
466}
467
468void MCStreamer::EmitWin64EHSetFrame(unsigned Register, unsigned Offset) {
469  EnsureValidW64UnwindInfo();
470  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
471  if (CurFrame->LastFrameInst >= 0)
472    report_fatal_error("Frame register and offset already specified!");
473  if (Offset & 0x0F)
474    report_fatal_error("Misaligned frame pointer offset!");
475  MCWin64EHInstruction Inst(Win64EH::UOP_SetFPReg, 0, Register, Offset);
476  CurFrame->LastFrameInst = CurFrame->Instructions.size();
477  CurFrame->Instructions.push_back(Inst);
478}
479
480void MCStreamer::EmitWin64EHAllocStack(unsigned Size) {
481  EnsureValidW64UnwindInfo();
482  if (Size & 7)
483    report_fatal_error("Misaligned stack allocation!");
484  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
485  MCSymbol *Label = getContext().CreateTempSymbol();
486  MCWin64EHInstruction Inst(Label, Size);
487  EmitLabel(Label);
488  CurFrame->Instructions.push_back(Inst);
489}
490
491void MCStreamer::EmitWin64EHSaveReg(unsigned Register, unsigned Offset) {
492  EnsureValidW64UnwindInfo();
493  if (Offset & 7)
494    report_fatal_error("Misaligned saved register offset!");
495  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
496  MCSymbol *Label = getContext().CreateTempSymbol();
497  MCWin64EHInstruction Inst(
498     Offset > 512*1024-8 ? Win64EH::UOP_SaveNonVolBig : Win64EH::UOP_SaveNonVol,
499                            Label, Register, Offset);
500  EmitLabel(Label);
501  CurFrame->Instructions.push_back(Inst);
502}
503
504void MCStreamer::EmitWin64EHSaveXMM(unsigned Register, unsigned Offset) {
505  EnsureValidW64UnwindInfo();
506  if (Offset & 0x0F)
507    report_fatal_error("Misaligned saved vector register offset!");
508  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
509  MCSymbol *Label = getContext().CreateTempSymbol();
510  MCWin64EHInstruction Inst(
511    Offset > 512*1024-16 ? Win64EH::UOP_SaveXMM128Big : Win64EH::UOP_SaveXMM128,
512                            Label, Register, Offset);
513  EmitLabel(Label);
514  CurFrame->Instructions.push_back(Inst);
515}
516
517void MCStreamer::EmitWin64EHPushFrame(bool Code) {
518  EnsureValidW64UnwindInfo();
519  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
520  if (CurFrame->Instructions.size() > 0)
521    report_fatal_error("If present, PushMachFrame must be the first UOP");
522  MCSymbol *Label = getContext().CreateTempSymbol();
523  MCWin64EHInstruction Inst(Win64EH::UOP_PushMachFrame, Label, Code);
524  EmitLabel(Label);
525  CurFrame->Instructions.push_back(Inst);
526}
527
528void MCStreamer::EmitWin64EHEndProlog() {
529  EnsureValidW64UnwindInfo();
530  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
531  CurFrame->PrologEnd = getContext().CreateTempSymbol();
532  EmitLabel(CurFrame->PrologEnd);
533}
534
535void MCStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
536  llvm_unreachable("This file format doesn't support this directive");
537}
538
539void MCStreamer::EmitFnStart() {
540  errs() << "Not implemented yet\n";
541  abort();
542}
543
544void MCStreamer::EmitFnEnd() {
545  errs() << "Not implemented yet\n";
546  abort();
547}
548
549void MCStreamer::EmitCantUnwind() {
550  errs() << "Not implemented yet\n";
551  abort();
552}
553
554void MCStreamer::EmitHandlerData() {
555  errs() << "Not implemented yet\n";
556  abort();
557}
558
559void MCStreamer::EmitPersonality(const MCSymbol *Personality) {
560  errs() << "Not implemented yet\n";
561  abort();
562}
563
564void MCStreamer::EmitSetFP(unsigned FpReg, unsigned SpReg, int64_t Offset) {
565  errs() << "Not implemented yet\n";
566  abort();
567}
568
569void MCStreamer::EmitPad(int64_t Offset) {
570  errs() << "Not implemented yet\n";
571  abort();
572}
573
574void MCStreamer::EmitRegSave(const SmallVectorImpl<unsigned> &RegList, bool) {
575  errs() << "Not implemented yet\n";
576  abort();
577}
578
579void MCStreamer::EmitTCEntry(const MCSymbol &S) {
580  llvm_unreachable("Unsupported method");
581}
582
583/// EmitRawText - If this file is backed by an assembly streamer, this dumps
584/// the specified string in the output .s file.  This capability is
585/// indicated by the hasRawTextSupport() predicate.
586void MCStreamer::EmitRawText(StringRef String) {
587  errs() << "EmitRawText called on an MCStreamer that doesn't support it, "
588  " something must not be fully mc'ized\n";
589  abort();
590}
591
592void MCStreamer::EmitRawText(const Twine &T) {
593  SmallString<128> Str;
594  T.toVector(Str);
595  EmitRawText(Str.str());
596}
597
598void MCStreamer::EmitFrames(bool usingCFI) {
599  if (!getNumFrameInfos())
600    return;
601
602  if (EmitEHFrame)
603    MCDwarfFrameEmitter::Emit(*this, usingCFI, true);
604
605  if (EmitDebugFrame)
606    MCDwarfFrameEmitter::Emit(*this, usingCFI, false);
607}
608
609void MCStreamer::EmitW64Tables() {
610  if (!getNumW64UnwindInfos())
611    return;
612
613  MCWin64EHUnwindEmitter::Emit(*this);
614}
615
616void MCStreamer::Finish() {
617  if (!FrameInfos.empty() && !FrameInfos.back().End)
618    report_fatal_error("Unfinished frame!");
619
620  FinishImpl();
621}
622
623MCSymbolData &MCStreamer::getOrCreateSymbolData(MCSymbol *Symbol) {
624  report_fatal_error("Not supported!");
625  return *(static_cast<MCSymbolData*>(0));
626}
627