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> 22 using namespace llvm; 23 24 MCStreamer::MCStreamer(StreamerKind Kind, MCContext &Ctx) 25 : Kind(Kind), Context(Ctx), EmitEHFrame(true), EmitDebugFrame(false), 26 CurrentW64UnwindInfo(0), LastSymbol(0), AutoInitSections(false) { 27 const MCSection *section = 0; 28 SectionStack.push_back(std::make_pair(section, section)); 29 } 30 31 MCStreamer::~MCStreamer() { 32 for (unsigned i = 0; i < getNumW64UnwindInfos(); ++i) 33 delete W64UnwindInfos[i]; 34 } 35 36 void MCStreamer::reset() { 37 for (unsigned i = 0; i < getNumW64UnwindInfos(); ++i) 38 delete W64UnwindInfos[i]; 39 EmitEHFrame = true; 40 EmitDebugFrame = false; 41 CurrentW64UnwindInfo = 0; 42 LastSymbol = 0; 43 const MCSection *section = 0; 44 SectionStack.clear(); 45 SectionStack.push_back(std::make_pair(section, section)); 46 } 47 48 const MCExpr *MCStreamer::BuildSymbolDiff(MCContext &Context, 49 const MCSymbol *A, 50 const MCSymbol *B) { 51 MCSymbolRefExpr::VariantKind Variant = MCSymbolRefExpr::VK_None; 52 const MCExpr *ARef = 53 MCSymbolRefExpr::Create(A, Variant, Context); 54 const MCExpr *BRef = 55 MCSymbolRefExpr::Create(B, Variant, Context); 56 const MCExpr *AddrDelta = 57 MCBinaryExpr::Create(MCBinaryExpr::Sub, ARef, BRef, Context); 58 return AddrDelta; 59 } 60 61 const MCExpr *MCStreamer::ForceExpAbs(const MCExpr* Expr) { 62 if (Context.getAsmInfo().hasAggressiveSymbolFolding() || 63 isa<MCSymbolRefExpr>(Expr)) 64 return Expr; 65 66 MCSymbol *ABS = Context.CreateTempSymbol(); 67 EmitAssignment(ABS, Expr); 68 return MCSymbolRefExpr::Create(ABS, Context); 69 } 70 71 raw_ostream &MCStreamer::GetCommentOS() { 72 // By default, discard comments. 73 return nulls(); 74 } 75 76 void MCStreamer::EmitDwarfSetLineAddr(int64_t LineDelta, 77 const MCSymbol *Label, int PointerSize) { 78 // emit the sequence to set the address 79 EmitIntValue(dwarf::DW_LNS_extended_op, 1); 80 EmitULEB128IntValue(PointerSize + 1); 81 EmitIntValue(dwarf::DW_LNE_set_address, 1); 82 EmitSymbolValue(Label, PointerSize); 83 84 // emit the sequence for the LineDelta (from 1) and a zero address delta. 85 MCDwarfLineAddr::Emit(this, LineDelta, 0); 86 } 87 88 /// EmitIntValue - Special case of EmitValue that avoids the client having to 89 /// pass in a MCExpr for constant integers. 90 void MCStreamer::EmitIntValue(uint64_t Value, unsigned Size, 91 unsigned AddrSpace) { 92 assert(Size <= 8 && "Invalid size"); 93 assert((isUIntN(8 * Size, Value) || isIntN(8 * Size, Value)) && 94 "Invalid size"); 95 char buf[8]; 96 const bool isLittleEndian = Context.getAsmInfo().isLittleEndian(); 97 for (unsigned i = 0; i != Size; ++i) { 98 unsigned index = isLittleEndian ? i : (Size - i - 1); 99 buf[i] = uint8_t(Value >> (index * 8)); 100 } 101 EmitBytes(StringRef(buf, Size), AddrSpace); 102 } 103 104 /// EmitULEB128Value - Special case of EmitULEB128Value that avoids the 105 /// client having to pass in a MCExpr for constant integers. 106 void MCStreamer::EmitULEB128IntValue(uint64_t Value, unsigned Padding, 107 unsigned AddrSpace) { 108 SmallString<128> Tmp; 109 raw_svector_ostream OSE(Tmp); 110 encodeULEB128(Value, OSE, Padding); 111 EmitBytes(OSE.str(), AddrSpace); 112 } 113 114 /// EmitSLEB128Value - Special case of EmitSLEB128Value that avoids the 115 /// client having to pass in a MCExpr for constant integers. 116 void MCStreamer::EmitSLEB128IntValue(int64_t Value, unsigned AddrSpace) { 117 SmallString<128> Tmp; 118 raw_svector_ostream OSE(Tmp); 119 encodeSLEB128(Value, OSE); 120 EmitBytes(OSE.str(), AddrSpace); 121 } 122 123 void MCStreamer::EmitAbsValue(const MCExpr *Value, unsigned Size, 124 unsigned AddrSpace) { 125 const MCExpr *ABS = ForceExpAbs(Value); 126 EmitValue(ABS, Size, AddrSpace); 127 } 128 129 130 void MCStreamer::EmitValue(const MCExpr *Value, unsigned Size, 131 unsigned AddrSpace) { 132 EmitValueImpl(Value, Size, AddrSpace); 133 } 134 135 void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size, 136 unsigned AddrSpace) { 137 EmitValueImpl(MCSymbolRefExpr::Create(Sym, getContext()), Size, 138 AddrSpace); 139 } 140 141 void MCStreamer::EmitGPRel64Value(const MCExpr *Value) { 142 report_fatal_error("unsupported directive in streamer"); 143 } 144 145 void MCStreamer::EmitGPRel32Value(const MCExpr *Value) { 146 report_fatal_error("unsupported directive in streamer"); 147 } 148 149 /// EmitFill - Emit NumBytes bytes worth of the value specified by 150 /// FillValue. This implements directives such as '.space'. 151 void MCStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue, 152 unsigned AddrSpace) { 153 const MCExpr *E = MCConstantExpr::Create(FillValue, getContext()); 154 for (uint64_t i = 0, e = NumBytes; i != e; ++i) 155 EmitValue(E, 1, AddrSpace); 156 } 157 158 bool MCStreamer::EmitDwarfFileDirective(unsigned FileNo, 159 StringRef Directory, 160 StringRef Filename, unsigned CUID) { 161 return getContext().GetDwarfFile(Directory, Filename, FileNo, CUID) == 0; 162 } 163 164 void MCStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line, 165 unsigned Column, unsigned Flags, 166 unsigned Isa, 167 unsigned Discriminator, 168 StringRef FileName) { 169 getContext().setCurrentDwarfLoc(FileNo, Line, Column, Flags, Isa, 170 Discriminator); 171 } 172 173 MCDwarfFrameInfo *MCStreamer::getCurrentFrameInfo() { 174 if (FrameInfos.empty()) 175 return 0; 176 return &FrameInfos.back(); 177 } 178 179 void MCStreamer::EnsureValidFrame() { 180 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 181 if (!CurFrame || CurFrame->End) 182 report_fatal_error("No open frame"); 183 } 184 185 void MCStreamer::EmitEHSymAttributes(const MCSymbol *Symbol, 186 MCSymbol *EHSymbol) { 187 } 188 189 void MCStreamer::EmitLabel(MCSymbol *Symbol) { 190 assert(!Symbol->isVariable() && "Cannot emit a variable symbol!"); 191 assert(getCurrentSection() && "Cannot emit before setting section!"); 192 Symbol->setSection(*getCurrentSection()); 193 LastSymbol = Symbol; 194 } 195 196 void MCStreamer::EmitDebugLabel(MCSymbol *Symbol) { 197 assert(!Symbol->isVariable() && "Cannot emit a variable symbol!"); 198 assert(getCurrentSection() && "Cannot emit before setting section!"); 199 Symbol->setSection(*getCurrentSection()); 200 LastSymbol = Symbol; 201 } 202 203 void MCStreamer::EmitCompactUnwindEncoding(uint32_t CompactUnwindEncoding) { 204 EnsureValidFrame(); 205 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 206 CurFrame->CompactUnwindEncoding = CompactUnwindEncoding; 207 } 208 209 void MCStreamer::EmitCFISections(bool EH, bool Debug) { 210 assert(EH || Debug); 211 EmitEHFrame = EH; 212 EmitDebugFrame = Debug; 213 } 214 215 void MCStreamer::EmitCFIStartProc() { 216 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 217 if (CurFrame && !CurFrame->End) 218 report_fatal_error("Starting a frame before finishing the previous one!"); 219 220 MCDwarfFrameInfo Frame; 221 EmitCFIStartProcImpl(Frame); 222 223 FrameInfos.push_back(Frame); 224 } 225 226 void MCStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) { 227 } 228 229 void MCStreamer::RecordProcStart(MCDwarfFrameInfo &Frame) { 230 Frame.Function = LastSymbol; 231 // If the function is externally visible, we need to create a local 232 // symbol to avoid relocations. 233 StringRef Prefix = getContext().getAsmInfo().getPrivateGlobalPrefix(); 234 if (LastSymbol && LastSymbol->getName().startswith(Prefix)) { 235 Frame.Begin = LastSymbol; 236 } else { 237 Frame.Begin = getContext().CreateTempSymbol(); 238 EmitLabel(Frame.Begin); 239 } 240 } 241 242 void MCStreamer::EmitCFIEndProc() { 243 EnsureValidFrame(); 244 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 245 EmitCFIEndProcImpl(*CurFrame); 246 } 247 248 void MCStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) { 249 } 250 251 void MCStreamer::RecordProcEnd(MCDwarfFrameInfo &Frame) { 252 Frame.End = getContext().CreateTempSymbol(); 253 EmitLabel(Frame.End); 254 } 255 256 MCSymbol *MCStreamer::EmitCFICommon() { 257 EnsureValidFrame(); 258 MCSymbol *Label = getContext().CreateTempSymbol(); 259 EmitLabel(Label); 260 return Label; 261 } 262 263 void MCStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) { 264 MCSymbol *Label = EmitCFICommon(); 265 MCCFIInstruction Instruction = 266 MCCFIInstruction::createDefCfa(Label, Register, Offset); 267 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 268 CurFrame->Instructions.push_back(Instruction); 269 } 270 271 void MCStreamer::EmitCFIDefCfaOffset(int64_t Offset) { 272 MCSymbol *Label = EmitCFICommon(); 273 MCCFIInstruction Instruction = 274 MCCFIInstruction::createDefCfaOffset(Label, Offset); 275 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 276 CurFrame->Instructions.push_back(Instruction); 277 } 278 279 void MCStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) { 280 MCSymbol *Label = EmitCFICommon(); 281 MCCFIInstruction Instruction = 282 MCCFIInstruction::createAdjustCfaOffset(Label, Adjustment); 283 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 284 CurFrame->Instructions.push_back(Instruction); 285 } 286 287 void MCStreamer::EmitCFIDefCfaRegister(int64_t Register) { 288 MCSymbol *Label = EmitCFICommon(); 289 MCCFIInstruction Instruction = 290 MCCFIInstruction::createDefCfaRegister(Label, Register); 291 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 292 CurFrame->Instructions.push_back(Instruction); 293 } 294 295 void MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) { 296 MCSymbol *Label = EmitCFICommon(); 297 MCCFIInstruction Instruction = 298 MCCFIInstruction::createOffset(Label, Register, Offset); 299 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 300 CurFrame->Instructions.push_back(Instruction); 301 } 302 303 void MCStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) { 304 MCSymbol *Label = EmitCFICommon(); 305 MCCFIInstruction Instruction = 306 MCCFIInstruction::createRelOffset(Label, Register, Offset); 307 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 308 CurFrame->Instructions.push_back(Instruction); 309 } 310 311 void MCStreamer::EmitCFIPersonality(const MCSymbol *Sym, 312 unsigned Encoding) { 313 EnsureValidFrame(); 314 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 315 CurFrame->Personality = Sym; 316 CurFrame->PersonalityEncoding = Encoding; 317 } 318 319 void MCStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) { 320 EnsureValidFrame(); 321 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 322 CurFrame->Lsda = Sym; 323 CurFrame->LsdaEncoding = Encoding; 324 } 325 326 void MCStreamer::EmitCFIRememberState() { 327 MCSymbol *Label = EmitCFICommon(); 328 MCCFIInstruction Instruction = MCCFIInstruction::createRememberState(Label); 329 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 330 CurFrame->Instructions.push_back(Instruction); 331 } 332 333 void MCStreamer::EmitCFIRestoreState() { 334 // FIXME: Error if there is no matching cfi_remember_state. 335 MCSymbol *Label = EmitCFICommon(); 336 MCCFIInstruction Instruction = MCCFIInstruction::createRestoreState(Label); 337 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 338 CurFrame->Instructions.push_back(Instruction); 339 } 340 341 void MCStreamer::EmitCFISameValue(int64_t Register) { 342 MCSymbol *Label = EmitCFICommon(); 343 MCCFIInstruction Instruction = 344 MCCFIInstruction::createSameValue(Label, Register); 345 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 346 CurFrame->Instructions.push_back(Instruction); 347 } 348 349 void MCStreamer::EmitCFIRestore(int64_t Register) { 350 MCSymbol *Label = EmitCFICommon(); 351 MCCFIInstruction Instruction = 352 MCCFIInstruction::createRestore(Label, Register); 353 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 354 CurFrame->Instructions.push_back(Instruction); 355 } 356 357 void MCStreamer::EmitCFIEscape(StringRef Values) { 358 MCSymbol *Label = EmitCFICommon(); 359 MCCFIInstruction Instruction = MCCFIInstruction::createEscape(Label, Values); 360 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 361 CurFrame->Instructions.push_back(Instruction); 362 } 363 364 void MCStreamer::EmitCFISignalFrame() { 365 EnsureValidFrame(); 366 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 367 CurFrame->IsSignalFrame = true; 368 } 369 370 void MCStreamer::EmitCFIUndefined(int64_t Register) { 371 MCSymbol *Label = EmitCFICommon(); 372 MCCFIInstruction Instruction = 373 MCCFIInstruction::createUndefined(Label, Register); 374 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 375 CurFrame->Instructions.push_back(Instruction); 376 } 377 378 void MCStreamer::EmitCFIRegister(int64_t Register1, int64_t Register2) { 379 MCSymbol *Label = EmitCFICommon(); 380 MCCFIInstruction Instruction = 381 MCCFIInstruction::createRegister(Label, Register1, Register2); 382 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 383 CurFrame->Instructions.push_back(Instruction); 384 } 385 386 void MCStreamer::setCurrentW64UnwindInfo(MCWin64EHUnwindInfo *Frame) { 387 W64UnwindInfos.push_back(Frame); 388 CurrentW64UnwindInfo = W64UnwindInfos.back(); 389 } 390 391 void MCStreamer::EnsureValidW64UnwindInfo() { 392 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; 393 if (!CurFrame || CurFrame->End) 394 report_fatal_error("No open Win64 EH frame function!"); 395 } 396 397 void MCStreamer::EmitWin64EHStartProc(const MCSymbol *Symbol) { 398 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; 399 if (CurFrame && !CurFrame->End) 400 report_fatal_error("Starting a function before ending the previous one!"); 401 MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo; 402 Frame->Begin = getContext().CreateTempSymbol(); 403 Frame->Function = Symbol; 404 EmitLabel(Frame->Begin); 405 setCurrentW64UnwindInfo(Frame); 406 } 407 408 void MCStreamer::EmitWin64EHEndProc() { 409 EnsureValidW64UnwindInfo(); 410 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; 411 if (CurFrame->ChainedParent) 412 report_fatal_error("Not all chained regions terminated!"); 413 CurFrame->End = getContext().CreateTempSymbol(); 414 EmitLabel(CurFrame->End); 415 } 416 417 void MCStreamer::EmitWin64EHStartChained() { 418 EnsureValidW64UnwindInfo(); 419 MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo; 420 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; 421 Frame->Begin = getContext().CreateTempSymbol(); 422 Frame->Function = CurFrame->Function; 423 Frame->ChainedParent = CurFrame; 424 EmitLabel(Frame->Begin); 425 setCurrentW64UnwindInfo(Frame); 426 } 427 428 void MCStreamer::EmitWin64EHEndChained() { 429 EnsureValidW64UnwindInfo(); 430 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; 431 if (!CurFrame->ChainedParent) 432 report_fatal_error("End of a chained region outside a chained region!"); 433 CurFrame->End = getContext().CreateTempSymbol(); 434 EmitLabel(CurFrame->End); 435 CurrentW64UnwindInfo = CurFrame->ChainedParent; 436 } 437 438 void MCStreamer::EmitWin64EHHandler(const MCSymbol *Sym, bool Unwind, 439 bool Except) { 440 EnsureValidW64UnwindInfo(); 441 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; 442 if (CurFrame->ChainedParent) 443 report_fatal_error("Chained unwind areas can't have handlers!"); 444 CurFrame->ExceptionHandler = Sym; 445 if (!Except && !Unwind) 446 report_fatal_error("Don't know what kind of handler this is!"); 447 if (Unwind) 448 CurFrame->HandlesUnwind = true; 449 if (Except) 450 CurFrame->HandlesExceptions = true; 451 } 452 453 void MCStreamer::EmitWin64EHHandlerData() { 454 EnsureValidW64UnwindInfo(); 455 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; 456 if (CurFrame->ChainedParent) 457 report_fatal_error("Chained unwind areas can't have handlers!"); 458 } 459 460 void MCStreamer::EmitWin64EHPushReg(unsigned Register) { 461 EnsureValidW64UnwindInfo(); 462 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; 463 MCSymbol *Label = getContext().CreateTempSymbol(); 464 MCWin64EHInstruction Inst(Win64EH::UOP_PushNonVol, Label, Register); 465 EmitLabel(Label); 466 CurFrame->Instructions.push_back(Inst); 467 } 468 469 void MCStreamer::EmitWin64EHSetFrame(unsigned Register, unsigned Offset) { 470 EnsureValidW64UnwindInfo(); 471 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; 472 if (CurFrame->LastFrameInst >= 0) 473 report_fatal_error("Frame register and offset already specified!"); 474 if (Offset & 0x0F) 475 report_fatal_error("Misaligned frame pointer offset!"); 476 MCWin64EHInstruction Inst(Win64EH::UOP_SetFPReg, 0, Register, Offset); 477 CurFrame->LastFrameInst = CurFrame->Instructions.size(); 478 CurFrame->Instructions.push_back(Inst); 479 } 480 481 void MCStreamer::EmitWin64EHAllocStack(unsigned Size) { 482 EnsureValidW64UnwindInfo(); 483 if (Size & 7) 484 report_fatal_error("Misaligned stack allocation!"); 485 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; 486 MCSymbol *Label = getContext().CreateTempSymbol(); 487 MCWin64EHInstruction Inst(Label, Size); 488 EmitLabel(Label); 489 CurFrame->Instructions.push_back(Inst); 490 } 491 492 void MCStreamer::EmitWin64EHSaveReg(unsigned Register, unsigned Offset) { 493 EnsureValidW64UnwindInfo(); 494 if (Offset & 7) 495 report_fatal_error("Misaligned saved register offset!"); 496 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; 497 MCSymbol *Label = getContext().CreateTempSymbol(); 498 MCWin64EHInstruction Inst( 499 Offset > 512*1024-8 ? Win64EH::UOP_SaveNonVolBig : Win64EH::UOP_SaveNonVol, 500 Label, Register, Offset); 501 EmitLabel(Label); 502 CurFrame->Instructions.push_back(Inst); 503 } 504 505 void MCStreamer::EmitWin64EHSaveXMM(unsigned Register, unsigned Offset) { 506 EnsureValidW64UnwindInfo(); 507 if (Offset & 0x0F) 508 report_fatal_error("Misaligned saved vector register offset!"); 509 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; 510 MCSymbol *Label = getContext().CreateTempSymbol(); 511 MCWin64EHInstruction Inst( 512 Offset > 512*1024-16 ? Win64EH::UOP_SaveXMM128Big : Win64EH::UOP_SaveXMM128, 513 Label, Register, Offset); 514 EmitLabel(Label); 515 CurFrame->Instructions.push_back(Inst); 516 } 517 518 void MCStreamer::EmitWin64EHPushFrame(bool Code) { 519 EnsureValidW64UnwindInfo(); 520 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; 521 if (CurFrame->Instructions.size() > 0) 522 report_fatal_error("If present, PushMachFrame must be the first UOP"); 523 MCSymbol *Label = getContext().CreateTempSymbol(); 524 MCWin64EHInstruction Inst(Win64EH::UOP_PushMachFrame, Label, Code); 525 EmitLabel(Label); 526 CurFrame->Instructions.push_back(Inst); 527 } 528 529 void MCStreamer::EmitWin64EHEndProlog() { 530 EnsureValidW64UnwindInfo(); 531 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; 532 CurFrame->PrologEnd = getContext().CreateTempSymbol(); 533 EmitLabel(CurFrame->PrologEnd); 534 } 535 536 void MCStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) { 537 llvm_unreachable("This file format doesn't support this directive"); 538 } 539 540 void MCStreamer::EmitFnStart() { 541 errs() << "Not implemented yet\n"; 542 abort(); 543 } 544 545 void MCStreamer::EmitFnEnd() { 546 errs() << "Not implemented yet\n"; 547 abort(); 548 } 549 550 void MCStreamer::EmitCantUnwind() { 551 errs() << "Not implemented yet\n"; 552 abort(); 553 } 554 555 void MCStreamer::EmitHandlerData() { 556 errs() << "Not implemented yet\n"; 557 abort(); 558 } 559 560 void MCStreamer::EmitPersonality(const MCSymbol *Personality) { 561 errs() << "Not implemented yet\n"; 562 abort(); 563 } 564 565 void MCStreamer::EmitSetFP(unsigned FpReg, unsigned SpReg, int64_t Offset) { 566 errs() << "Not implemented yet\n"; 567 abort(); 568 } 569 570 void MCStreamer::EmitPad(int64_t Offset) { 571 errs() << "Not implemented yet\n"; 572 abort(); 573 } 574 575 void MCStreamer::EmitRegSave(const SmallVectorImpl<unsigned> &RegList, bool) { 576 errs() << "Not implemented yet\n"; 577 abort(); 578 } 579 580 void MCStreamer::EmitTCEntry(const MCSymbol &S) { 581 llvm_unreachable("Unsupported method"); 582 } 583 584 /// EmitRawText - If this file is backed by an assembly streamer, this dumps 585 /// the specified string in the output .s file. This capability is 586 /// indicated by the hasRawTextSupport() predicate. 587 void MCStreamer::EmitRawText(StringRef String) { 588 errs() << "EmitRawText called on an MCStreamer that doesn't support it, " 589 " something must not be fully mc'ized\n"; 590 abort(); 591 } 592 593 void MCStreamer::EmitRawText(const Twine &T) { 594 SmallString<128> Str; 595 T.toVector(Str); 596 EmitRawText(Str.str()); 597 } 598 599 void MCStreamer::EmitFrames(bool usingCFI) { 600 if (!getNumFrameInfos()) 601 return; 602 603 if (EmitEHFrame) 604 MCDwarfFrameEmitter::Emit(*this, usingCFI, true); 605 606 if (EmitDebugFrame) 607 MCDwarfFrameEmitter::Emit(*this, usingCFI, false); 608 } 609 610 void MCStreamer::EmitW64Tables() { 611 if (!getNumW64UnwindInfos()) 612 return; 613 614 MCWin64EHUnwindEmitter::Emit(*this); 615 } 616 617 void MCStreamer::Finish() { 618 if (!FrameInfos.empty() && !FrameInfos.back().End) 619 report_fatal_error("Unfinished frame!"); 620 621 FinishImpl(); 622 } 623 624 MCSymbolData &MCStreamer::getOrCreateSymbolData(MCSymbol *Symbol) { 625 report_fatal_error("Not supported!"); 626 return *(static_cast<MCSymbolData*>(0)); 627 } 628