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