MCStreamer.cpp revision 3e96531186ba574b0c25a4be62d24b8b7d752c9f 
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)
24  : Context(Ctx), EmitEHFrame(true), EmitDebugFrame(false),
25    CurrentW64UnwindInfo(0), LastSymbol(0) {
26  const MCSection *section = NULL;
27  SectionStack.push_back(std::make_pair(section, section));
28}
29
30MCStreamer::~MCStreamer() {
31  for (unsigned i = 0; i < getNumW64UnwindInfos(); ++i)
32    delete W64UnwindInfos[i];
33}
34
35const MCExpr *MCStreamer::BuildSymbolDiff(MCContext &Context,
36                                          const MCSymbol *A,
37                                          const MCSymbol *B) {
38  MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None;
39  const MCExpr *ARef =
40    MCSymbolRefExpr::Create(A, Variant, Context);
41  const MCExpr *BRef =
42    MCSymbolRefExpr::Create(B, Variant, Context);
43  const MCExpr *AddrDelta =
44    MCBinaryExpr::Create(MCBinaryExpr::Sub, ARef, BRef, Context);
45  return AddrDelta;
46}
47
48const MCExpr *MCStreamer::ForceExpAbs(const MCExpr* Expr) {
49  if (Context.getAsmInfo().hasAggressiveSymbolFolding() ||
50      isa<MCSymbolRefExpr>(Expr))
51    return Expr;
52
53  MCSymbol *ABS = Context.CreateTempSymbol();
54  EmitAssignment(ABS, Expr);
55  return MCSymbolRefExpr::Create(ABS, Context);
56}
57
58raw_ostream &MCStreamer::GetCommentOS() {
59  // By default, discard comments.
60  return nulls();
61}
62
63void MCStreamer::EmitDwarfSetLineAddr(int64_t LineDelta,
64                                      const MCSymbol *Label, int PointerSize) {
65  // emit the sequence to set the address
66  EmitIntValue(dwarf::DW_LNS_extended_op, 1);
67  EmitULEB128IntValue(PointerSize + 1);
68  EmitIntValue(dwarf::DW_LNE_set_address, 1);
69  EmitSymbolValue(Label, PointerSize);
70
71  // emit the sequence for the LineDelta (from 1) and a zero address delta.
72  MCDwarfLineAddr::Emit(this, LineDelta, 0);
73}
74
75/// EmitIntValue - Special case of EmitValue that avoids the client having to
76/// pass in a MCExpr for constant integers.
77void MCStreamer::EmitIntValue(uint64_t Value, unsigned Size,
78                              unsigned AddrSpace) {
79  assert(Size <= 8 && "Invalid size");
80  assert((isUIntN(8 * Size, Value) || isIntN(8 * Size, Value)) &&
81         "Invalid size");
82  char buf[8];
83  const bool isLittleEndian = Context.getAsmInfo().isLittleEndian();
84  for (unsigned i = 0; i != Size; ++i) {
85    unsigned index = isLittleEndian ? i : (Size - i - 1);
86    buf[i] = uint8_t(Value >> (index * 8));
87  }
88  EmitBytes(StringRef(buf, Size), AddrSpace);
89}
90
91/// EmitULEB128Value - Special case of EmitULEB128Value that avoids the
92/// client having to pass in a MCExpr for constant integers.
93void MCStreamer::EmitULEB128IntValue(uint64_t Value, unsigned AddrSpace,
94                                     unsigned Padding) {
95  SmallString<128> Tmp;
96  raw_svector_ostream OSE(Tmp);
97  MCObjectWriter::EncodeULEB128(Value, OSE, Padding);
98  EmitBytes(OSE.str(), AddrSpace);
99}
100
101/// EmitSLEB128Value - Special case of EmitSLEB128Value that avoids the
102/// client having to pass in a MCExpr for constant integers.
103void MCStreamer::EmitSLEB128IntValue(int64_t Value, unsigned AddrSpace) {
104  SmallString<128> Tmp;
105  raw_svector_ostream OSE(Tmp);
106  MCObjectWriter::EncodeSLEB128(Value, OSE);
107  EmitBytes(OSE.str(), AddrSpace);
108}
109
110void MCStreamer::EmitAbsValue(const MCExpr *Value, unsigned Size,
111                              unsigned AddrSpace) {
112  const MCExpr *ABS = ForceExpAbs(Value);
113  EmitValue(ABS, Size, AddrSpace);
114}
115
116
117void MCStreamer::EmitValue(const MCExpr *Value, unsigned Size,
118                           unsigned AddrSpace) {
119  EmitValueImpl(Value, Size, AddrSpace);
120}
121
122void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size,
123                                  unsigned AddrSpace) {
124  EmitValueImpl(MCSymbolRefExpr::Create(Sym, getContext()), Size,
125                AddrSpace);
126}
127
128void MCStreamer::EmitGPRel64Value(const MCExpr *Value) {
129  report_fatal_error("unsupported directive in streamer");
130}
131
132void MCStreamer::EmitGPRel32Value(const MCExpr *Value) {
133  report_fatal_error("unsupported directive in streamer");
134}
135
136/// EmitFill - Emit NumBytes bytes worth of the value specified by
137/// FillValue.  This implements directives such as '.space'.
138void MCStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue,
139                          unsigned AddrSpace) {
140  const MCExpr *E = MCConstantExpr::Create(FillValue, getContext());
141  for (uint64_t i = 0, e = NumBytes; i != e; ++i)
142    EmitValue(E, 1, AddrSpace);
143}
144
145bool MCStreamer::EmitDwarfFileDirective(unsigned FileNo,
146                                        StringRef Directory,
147                                        StringRef Filename) {
148  return getContext().GetDwarfFile(Directory, Filename, FileNo) == 0;
149}
150
151void MCStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
152                                       unsigned Column, unsigned Flags,
153                                       unsigned Isa,
154                                       unsigned Discriminator,
155                                       StringRef FileName) {
156  getContext().setCurrentDwarfLoc(FileNo, Line, Column, Flags, Isa,
157                                  Discriminator);
158}
159
160MCDwarfFrameInfo *MCStreamer::getCurrentFrameInfo() {
161  if (FrameInfos.empty())
162    return NULL;
163  return &FrameInfos.back();
164}
165
166void MCStreamer::EnsureValidFrame() {
167  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
168  if (!CurFrame || CurFrame->End)
169    report_fatal_error("No open frame");
170}
171
172void MCStreamer::EmitEHSymAttributes(const MCSymbol *Symbol,
173                                     MCSymbol *EHSymbol) {
174}
175
176void MCStreamer::EmitLabel(MCSymbol *Symbol) {
177  assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
178  assert(getCurrentSection() && "Cannot emit before setting section!");
179  Symbol->setSection(*getCurrentSection());
180  LastSymbol = Symbol;
181}
182
183void MCStreamer::EmitCompactUnwindEncoding(uint32_t CompactUnwindEncoding) {
184  EnsureValidFrame();
185  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
186  CurFrame->CompactUnwindEncoding = CompactUnwindEncoding;
187}
188
189void MCStreamer::EmitCFISections(bool EH, bool Debug) {
190  assert(EH || Debug);
191  EmitEHFrame = EH;
192  EmitDebugFrame = Debug;
193}
194
195void MCStreamer::EmitCFIStartProc() {
196  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
197  if (CurFrame && !CurFrame->End)
198    report_fatal_error("Starting a frame before finishing the previous one!");
199
200  MCDwarfFrameInfo Frame;
201  EmitCFIStartProcImpl(Frame);
202
203  FrameInfos.push_back(Frame);
204}
205
206void MCStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) {
207}
208
209void MCStreamer::RecordProcStart(MCDwarfFrameInfo &Frame) {
210  Frame.Function = LastSymbol;
211  // If the function is externally visible, we need to create a local
212  // symbol to avoid relocations.
213  StringRef Prefix = getContext().getAsmInfo().getPrivateGlobalPrefix();
214  if (LastSymbol && LastSymbol->getName().startswith(Prefix)) {
215    Frame.Begin = LastSymbol;
216  } else {
217    Frame.Begin = getContext().CreateTempSymbol();
218    EmitLabel(Frame.Begin);
219  }
220}
221
222void MCStreamer::EmitCFIEndProc() {
223  EnsureValidFrame();
224  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
225  EmitCFIEndProcImpl(*CurFrame);
226}
227
228void MCStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
229}
230
231void MCStreamer::RecordProcEnd(MCDwarfFrameInfo &Frame) {
232  Frame.End = getContext().CreateTempSymbol();
233  EmitLabel(Frame.End);
234}
235
236void MCStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) {
237  EnsureValidFrame();
238  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
239  MCSymbol *Label = getContext().CreateTempSymbol();
240  EmitLabel(Label);
241  MachineLocation Dest(MachineLocation::VirtualFP);
242  MachineLocation Source(Register, -Offset);
243  MCCFIInstruction Instruction(Label, Dest, Source);
244  CurFrame->Instructions.push_back(Instruction);
245}
246
247void MCStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
248  EnsureValidFrame();
249  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
250  MCSymbol *Label = getContext().CreateTempSymbol();
251  EmitLabel(Label);
252  MachineLocation Dest(MachineLocation::VirtualFP);
253  MachineLocation Source(MachineLocation::VirtualFP, -Offset);
254  MCCFIInstruction Instruction(Label, Dest, Source);
255  CurFrame->Instructions.push_back(Instruction);
256}
257
258void MCStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) {
259  EnsureValidFrame();
260  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
261  MCSymbol *Label = getContext().CreateTempSymbol();
262  EmitLabel(Label);
263  MachineLocation Dest(MachineLocation::VirtualFP);
264  MachineLocation Source(MachineLocation::VirtualFP, Adjustment);
265  MCCFIInstruction Instruction(MCCFIInstruction::RelMove, Label, Dest, Source);
266  CurFrame->Instructions.push_back(Instruction);
267}
268
269void MCStreamer::EmitCFIDefCfaRegister(int64_t Register) {
270  EnsureValidFrame();
271  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
272  MCSymbol *Label = getContext().CreateTempSymbol();
273  EmitLabel(Label);
274  MachineLocation Dest(Register);
275  MachineLocation Source(MachineLocation::VirtualFP);
276  MCCFIInstruction Instruction(Label, Dest, Source);
277  CurFrame->Instructions.push_back(Instruction);
278}
279
280void MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
281  EnsureValidFrame();
282  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
283  MCSymbol *Label = getContext().CreateTempSymbol();
284  EmitLabel(Label);
285  MachineLocation Dest(Register, Offset);
286  MachineLocation Source(Register, Offset);
287  MCCFIInstruction Instruction(Label, Dest, Source);
288  CurFrame->Instructions.push_back(Instruction);
289}
290
291void MCStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) {
292  EnsureValidFrame();
293  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
294  MCSymbol *Label = getContext().CreateTempSymbol();
295  EmitLabel(Label);
296  MachineLocation Dest(Register, Offset);
297  MachineLocation Source(Register, Offset);
298  MCCFIInstruction Instruction(MCCFIInstruction::RelMove, Label, Dest, Source);
299  CurFrame->Instructions.push_back(Instruction);
300}
301
302void MCStreamer::EmitCFIPersonality(const MCSymbol *Sym,
303                                    unsigned Encoding) {
304  EnsureValidFrame();
305  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
306  CurFrame->Personality = Sym;
307  CurFrame->PersonalityEncoding = Encoding;
308}
309
310void MCStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) {
311  EnsureValidFrame();
312  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
313  CurFrame->Lsda = Sym;
314  CurFrame->LsdaEncoding = Encoding;
315}
316
317void MCStreamer::EmitCFIRememberState() {
318  EnsureValidFrame();
319  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
320  MCSymbol *Label = getContext().CreateTempSymbol();
321  EmitLabel(Label);
322  MCCFIInstruction Instruction(MCCFIInstruction::RememberState, Label);
323  CurFrame->Instructions.push_back(Instruction);
324}
325
326void MCStreamer::EmitCFIRestoreState() {
327  // FIXME: Error if there is no matching cfi_remember_state.
328  EnsureValidFrame();
329  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
330  MCSymbol *Label = getContext().CreateTempSymbol();
331  EmitLabel(Label);
332  MCCFIInstruction Instruction(MCCFIInstruction::RestoreState, Label);
333  CurFrame->Instructions.push_back(Instruction);
334}
335
336void MCStreamer::EmitCFISameValue(int64_t Register) {
337  EnsureValidFrame();
338  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
339  MCSymbol *Label = getContext().CreateTempSymbol();
340  EmitLabel(Label);
341  MCCFIInstruction Instruction(MCCFIInstruction::SameValue, Label, Register);
342  CurFrame->Instructions.push_back(Instruction);
343}
344
345void MCStreamer::EmitCFIRestore(int64_t Register) {
346  EnsureValidFrame();
347  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
348  MCSymbol *Label = getContext().CreateTempSymbol();
349  EmitLabel(Label);
350  MCCFIInstruction Instruction(MCCFIInstruction::Restore, Label, Register);
351  CurFrame->Instructions.push_back(Instruction);
352}
353
354void MCStreamer::EmitCFIEscape(StringRef Values) {
355  EnsureValidFrame();
356  MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
357  MCSymbol *Label = getContext().CreateTempSymbol();
358  EmitLabel(Label);
359  MCCFIInstruction Instruction(MCCFIInstruction::Escape, Label, Values);
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::setCurrentW64UnwindInfo(MCWin64EHUnwindInfo *Frame) {
370  W64UnwindInfos.push_back(Frame);
371  CurrentW64UnwindInfo = W64UnwindInfos.back();
372}
373
374void MCStreamer::EnsureValidW64UnwindInfo() {
375  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
376  if (!CurFrame || CurFrame->End)
377    report_fatal_error("No open Win64 EH frame function!");
378}
379
380void MCStreamer::EmitWin64EHStartProc(const MCSymbol *Symbol) {
381  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
382  if (CurFrame && !CurFrame->End)
383    report_fatal_error("Starting a function before ending the previous one!");
384  MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo;
385  Frame->Begin = getContext().CreateTempSymbol();
386  Frame->Function = Symbol;
387  EmitLabel(Frame->Begin);
388  setCurrentW64UnwindInfo(Frame);
389}
390
391void MCStreamer::EmitWin64EHEndProc() {
392  EnsureValidW64UnwindInfo();
393  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
394  if (CurFrame->ChainedParent)
395    report_fatal_error("Not all chained regions terminated!");
396  CurFrame->End = getContext().CreateTempSymbol();
397  EmitLabel(CurFrame->End);
398}
399
400void MCStreamer::EmitWin64EHStartChained() {
401  EnsureValidW64UnwindInfo();
402  MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo;
403  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
404  Frame->Begin = getContext().CreateTempSymbol();
405  Frame->Function = CurFrame->Function;
406  Frame->ChainedParent = CurFrame;
407  EmitLabel(Frame->Begin);
408  setCurrentW64UnwindInfo(Frame);
409}
410
411void MCStreamer::EmitWin64EHEndChained() {
412  EnsureValidW64UnwindInfo();
413  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
414  if (!CurFrame->ChainedParent)
415    report_fatal_error("End of a chained region outside a chained region!");
416  CurFrame->End = getContext().CreateTempSymbol();
417  EmitLabel(CurFrame->End);
418  CurrentW64UnwindInfo = CurFrame->ChainedParent;
419}
420
421void MCStreamer::EmitWin64EHHandler(const MCSymbol *Sym, bool Unwind,
422                                    bool Except) {
423  EnsureValidW64UnwindInfo();
424  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
425  if (CurFrame->ChainedParent)
426    report_fatal_error("Chained unwind areas can't have handlers!");
427  CurFrame->ExceptionHandler = Sym;
428  if (!Except && !Unwind)
429    report_fatal_error("Don't know what kind of handler this is!");
430  if (Unwind)
431    CurFrame->HandlesUnwind = true;
432  if (Except)
433    CurFrame->HandlesExceptions = true;
434}
435
436void MCStreamer::EmitWin64EHHandlerData() {
437  EnsureValidW64UnwindInfo();
438  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
439  if (CurFrame->ChainedParent)
440    report_fatal_error("Chained unwind areas can't have handlers!");
441}
442
443void MCStreamer::EmitWin64EHPushReg(unsigned Register) {
444  EnsureValidW64UnwindInfo();
445  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
446  MCSymbol *Label = getContext().CreateTempSymbol();
447  MCWin64EHInstruction Inst(Win64EH::UOP_PushNonVol, Label, Register);
448  EmitLabel(Label);
449  CurFrame->Instructions.push_back(Inst);
450}
451
452void MCStreamer::EmitWin64EHSetFrame(unsigned Register, unsigned Offset) {
453  EnsureValidW64UnwindInfo();
454  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
455  if (CurFrame->LastFrameInst >= 0)
456    report_fatal_error("Frame register and offset already specified!");
457  if (Offset & 0x0F)
458    report_fatal_error("Misaligned frame pointer offset!");
459  MCWin64EHInstruction Inst(Win64EH::UOP_SetFPReg, NULL, Register, Offset);
460  CurFrame->LastFrameInst = CurFrame->Instructions.size();
461  CurFrame->Instructions.push_back(Inst);
462}
463
464void MCStreamer::EmitWin64EHAllocStack(unsigned Size) {
465  EnsureValidW64UnwindInfo();
466  if (Size & 7)
467    report_fatal_error("Misaligned stack allocation!");
468  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
469  MCSymbol *Label = getContext().CreateTempSymbol();
470  MCWin64EHInstruction Inst(Label, Size);
471  EmitLabel(Label);
472  CurFrame->Instructions.push_back(Inst);
473}
474
475void MCStreamer::EmitWin64EHSaveReg(unsigned Register, unsigned Offset) {
476  EnsureValidW64UnwindInfo();
477  if (Offset & 7)
478    report_fatal_error("Misaligned saved register offset!");
479  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
480  MCSymbol *Label = getContext().CreateTempSymbol();
481  MCWin64EHInstruction Inst(
482     Offset > 512*1024-8 ? Win64EH::UOP_SaveNonVolBig : Win64EH::UOP_SaveNonVol,
483                            Label, Register, Offset);
484  EmitLabel(Label);
485  CurFrame->Instructions.push_back(Inst);
486}
487
488void MCStreamer::EmitWin64EHSaveXMM(unsigned Register, unsigned Offset) {
489  EnsureValidW64UnwindInfo();
490  if (Offset & 0x0F)
491    report_fatal_error("Misaligned saved vector register offset!");
492  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
493  MCSymbol *Label = getContext().CreateTempSymbol();
494  MCWin64EHInstruction Inst(
495    Offset > 512*1024-16 ? Win64EH::UOP_SaveXMM128Big : Win64EH::UOP_SaveXMM128,
496                            Label, Register, Offset);
497  EmitLabel(Label);
498  CurFrame->Instructions.push_back(Inst);
499}
500
501void MCStreamer::EmitWin64EHPushFrame(bool Code) {
502  EnsureValidW64UnwindInfo();
503  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
504  if (CurFrame->Instructions.size() > 0)
505    report_fatal_error("If present, PushMachFrame must be the first UOP");
506  MCSymbol *Label = getContext().CreateTempSymbol();
507  MCWin64EHInstruction Inst(Win64EH::UOP_PushMachFrame, Label, Code);
508  EmitLabel(Label);
509  CurFrame->Instructions.push_back(Inst);
510}
511
512void MCStreamer::EmitWin64EHEndProlog() {
513  EnsureValidW64UnwindInfo();
514  MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
515  CurFrame->PrologEnd = getContext().CreateTempSymbol();
516  EmitLabel(CurFrame->PrologEnd);
517}
518
519void MCStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
520  llvm_unreachable("This file format doesn't support this directive");
521}
522
523void MCStreamer::EmitFnStart() {
524  errs() << "Not implemented yet\n";
525  abort();
526}
527
528void MCStreamer::EmitFnEnd() {
529  errs() << "Not implemented yet\n";
530  abort();
531}
532
533void MCStreamer::EmitCantUnwind() {
534  errs() << "Not implemented yet\n";
535  abort();
536}
537
538void MCStreamer::EmitHandlerData() {
539  errs() << "Not implemented yet\n";
540  abort();
541}
542
543void MCStreamer::EmitPersonality(const MCSymbol *Personality) {
544  errs() << "Not implemented yet\n";
545  abort();
546}
547
548void MCStreamer::EmitSetFP(unsigned FpReg, unsigned SpReg, int64_t Offset) {
549  errs() << "Not implemented yet\n";
550  abort();
551}
552
553void MCStreamer::EmitPad(int64_t Offset) {
554  errs() << "Not implemented yet\n";
555  abort();
556}
557
558void MCStreamer::EmitRegSave(const SmallVectorImpl<unsigned> &RegList, bool) {
559  errs() << "Not implemented yet\n";
560  abort();
561}
562
563/// EmitRawText - If this file is backed by an assembly streamer, this dumps
564/// the specified string in the output .s file.  This capability is
565/// indicated by the hasRawTextSupport() predicate.
566void MCStreamer::EmitRawText(StringRef String) {
567  errs() << "EmitRawText called on an MCStreamer that doesn't support it, "
568  " something must not be fully mc'ized\n";
569  abort();
570}
571
572void MCStreamer::EmitRawText(const Twine &T) {
573  SmallString<128> Str;
574  T.toVector(Str);
575  EmitRawText(Str.str());
576}
577
578void MCStreamer::EmitFrames(bool usingCFI) {
579  if (!getNumFrameInfos())
580    return;
581
582  if (EmitEHFrame)
583    MCDwarfFrameEmitter::Emit(*this, usingCFI, true);
584
585  if (EmitDebugFrame)
586    MCDwarfFrameEmitter::Emit(*this, usingCFI, false);
587}
588
589void MCStreamer::EmitW64Tables() {
590  if (!getNumW64UnwindInfos())
591    return;
592
593  MCWin64EHUnwindEmitter::Emit(*this);
594}
595
596void MCStreamer::Finish() {
597  if (!FrameInfos.empty() && !FrameInfos.back().End)
598    report_fatal_error("Unfinished frame!");
599
600  FinishImpl();
601}
602