MCStreamer.cpp revision 99cb622041a0839c7dfcf0263c5102a305a0fdb5
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