MCStreamer.cpp revision 83ba58e5f0a5afbb23d7d2092d817accded4455a
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/MCAsmBackend.h" 14#include "llvm/MC/MCAsmInfo.h" 15#include "llvm/MC/MCContext.h" 16#include "llvm/MC/MCExpr.h" 17#include "llvm/MC/MCObjectWriter.h" 18#include "llvm/MC/MCSymbol.h" 19#include "llvm/Support/ErrorHandling.h" 20#include "llvm/Support/LEB128.h" 21#include "llvm/Support/raw_ostream.h" 22#include <cstdlib> 23using namespace llvm; 24 25MCStreamer::MCStreamer(StreamerKind Kind, MCContext &Ctx) 26 : Kind(Kind), Context(Ctx), EmitEHFrame(true), EmitDebugFrame(false), 27 CurrentW64UnwindInfo(0), LastSymbol(0), AutoInitSections(false) { 28 SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>()); 29} 30 31MCStreamer::~MCStreamer() { 32 for (unsigned i = 0; i < getNumW64UnwindInfos(); ++i) 33 delete W64UnwindInfos[i]; 34} 35 36void MCStreamer::reset() { 37 for (unsigned i = 0; i < getNumW64UnwindInfos(); ++i) 38 delete W64UnwindInfos[i]; 39 W64UnwindInfos.clear(); 40 EmitEHFrame = true; 41 EmitDebugFrame = false; 42 CurrentW64UnwindInfo = 0; 43 LastSymbol = 0; 44 SectionStack.clear(); 45 SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>()); 46} 47 48const 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 61const 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 71raw_ostream &MCStreamer::GetCommentOS() { 72 // By default, discard comments. 73 return nulls(); 74} 75 76void MCStreamer::generateCompactUnwindEncodings(MCAsmBackend *MAB) { 77 for (std::vector<MCDwarfFrameInfo>::iterator I = FrameInfos.begin(), 78 E = FrameInfos.end(); I != E; ++I) 79 I->CompactUnwindEncoding = 80 (MAB ? MAB->generateCompactUnwindEncoding(I->Instructions) : 0); 81} 82 83void MCStreamer::EmitDwarfSetLineAddr(int64_t LineDelta, 84 const MCSymbol *Label, int PointerSize) { 85 // emit the sequence to set the address 86 EmitIntValue(dwarf::DW_LNS_extended_op, 1); 87 EmitULEB128IntValue(PointerSize + 1); 88 EmitIntValue(dwarf::DW_LNE_set_address, 1); 89 EmitSymbolValue(Label, PointerSize); 90 91 // emit the sequence for the LineDelta (from 1) and a zero address delta. 92 MCDwarfLineAddr::Emit(this, LineDelta, 0); 93} 94 95/// EmitIntValue - Special case of EmitValue that avoids the client having to 96/// pass in a MCExpr for constant integers. 97void MCStreamer::EmitIntValue(uint64_t Value, unsigned Size) { 98 assert(Size <= 8 && "Invalid size"); 99 assert((isUIntN(8 * Size, Value) || isIntN(8 * Size, Value)) && 100 "Invalid size"); 101 char buf[8]; 102 const bool isLittleEndian = Context.getAsmInfo()->isLittleEndian(); 103 for (unsigned i = 0; i != Size; ++i) { 104 unsigned index = isLittleEndian ? i : (Size - i - 1); 105 buf[i] = uint8_t(Value >> (index * 8)); 106 } 107 EmitBytes(StringRef(buf, Size)); 108} 109 110/// EmitULEB128Value - Special case of EmitULEB128Value that avoids the 111/// client having to pass in a MCExpr for constant integers. 112void MCStreamer::EmitULEB128IntValue(uint64_t Value, unsigned Padding) { 113 SmallString<128> Tmp; 114 raw_svector_ostream OSE(Tmp); 115 encodeULEB128(Value, OSE, Padding); 116 EmitBytes(OSE.str()); 117} 118 119/// EmitSLEB128Value - Special case of EmitSLEB128Value that avoids the 120/// client having to pass in a MCExpr for constant integers. 121void MCStreamer::EmitSLEB128IntValue(int64_t Value) { 122 SmallString<128> Tmp; 123 raw_svector_ostream OSE(Tmp); 124 encodeSLEB128(Value, OSE); 125 EmitBytes(OSE.str()); 126} 127 128void MCStreamer::EmitAbsValue(const MCExpr *Value, unsigned Size) { 129 const MCExpr *ABS = ForceExpAbs(Value); 130 EmitValue(ABS, Size); 131} 132 133 134void MCStreamer::EmitValue(const MCExpr *Value, unsigned Size) { 135 EmitValueImpl(Value, Size); 136} 137 138void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size) { 139 EmitValueImpl(MCSymbolRefExpr::Create(Sym, getContext()), Size); 140} 141 142void MCStreamer::EmitGPRel64Value(const MCExpr *Value) { 143 report_fatal_error("unsupported directive in streamer"); 144} 145 146void MCStreamer::EmitGPRel32Value(const MCExpr *Value) { 147 report_fatal_error("unsupported directive in streamer"); 148} 149 150/// EmitFill - Emit NumBytes bytes worth of the value specified by 151/// FillValue. This implements directives such as '.space'. 152void MCStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue) { 153 const MCExpr *E = MCConstantExpr::Create(FillValue, getContext()); 154 for (uint64_t i = 0, e = NumBytes; i != e; ++i) 155 EmitValue(E, 1); 156} 157 158/// The implementation in this class just redirects to EmitFill. 159void MCStreamer::EmitZeros(uint64_t NumBytes) { 160 EmitFill(NumBytes, 0); 161} 162 163bool MCStreamer::EmitDwarfFileDirective(unsigned FileNo, 164 StringRef Directory, 165 StringRef Filename, unsigned CUID) { 166 return getContext().GetDwarfFile(Directory, Filename, FileNo, CUID) == 0; 167} 168 169void MCStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line, 170 unsigned Column, unsigned Flags, 171 unsigned Isa, 172 unsigned Discriminator, 173 StringRef FileName) { 174 getContext().setCurrentDwarfLoc(FileNo, Line, Column, Flags, Isa, 175 Discriminator); 176} 177 178MCDwarfFrameInfo *MCStreamer::getCurrentFrameInfo() { 179 if (FrameInfos.empty()) 180 return 0; 181 return &FrameInfos.back(); 182} 183 184void MCStreamer::EnsureValidFrame() { 185 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 186 if (!CurFrame || CurFrame->End) 187 report_fatal_error("No open frame"); 188} 189 190void MCStreamer::EmitEHSymAttributes(const MCSymbol *Symbol, 191 MCSymbol *EHSymbol) { 192} 193 194void MCStreamer::AssignSection(MCSymbol *Symbol, const MCSection *Section) { 195 if (Section) 196 Symbol->setSection(*Section); 197 else 198 Symbol->setUndefined(); 199 200 // As we emit symbols into a section, track the order so that they can 201 // be sorted upon later. Zero is reserved to mean 'unemitted'. 202 SymbolOrdering[Symbol] = 1 + SymbolOrdering.size(); 203} 204 205void MCStreamer::EmitLabel(MCSymbol *Symbol) { 206 assert(!Symbol->isVariable() && "Cannot emit a variable symbol!"); 207 assert(getCurrentSection().first && "Cannot emit before setting section!"); 208 AssignSection(Symbol, getCurrentSection().first); 209 LastSymbol = Symbol; 210} 211 212void MCStreamer::EmitDebugLabel(MCSymbol *Symbol) { 213 assert(!Symbol->isVariable() && "Cannot emit a variable symbol!"); 214 assert(getCurrentSection().first && "Cannot emit before setting section!"); 215 AssignSection(Symbol, getCurrentSection().first); 216 LastSymbol = Symbol; 217} 218 219void MCStreamer::EmitCompactUnwindEncoding(uint32_t CompactUnwindEncoding) { 220 EnsureValidFrame(); 221 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 222 CurFrame->CompactUnwindEncoding = CompactUnwindEncoding; 223} 224 225void MCStreamer::EmitCFISections(bool EH, bool Debug) { 226 assert(EH || Debug); 227 EmitEHFrame = EH; 228 EmitDebugFrame = Debug; 229} 230 231void MCStreamer::EmitCFIStartProc() { 232 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 233 if (CurFrame && !CurFrame->End) 234 report_fatal_error("Starting a frame before finishing the previous one!"); 235 236 MCDwarfFrameInfo Frame; 237 EmitCFIStartProcImpl(Frame); 238 239 FrameInfos.push_back(Frame); 240} 241 242void MCStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) { 243} 244 245void MCStreamer::RecordProcStart(MCDwarfFrameInfo &Frame) { 246 Frame.Function = LastSymbol; 247 // If the function is externally visible, we need to create a local 248 // symbol to avoid relocations. 249 StringRef Prefix = getContext().getAsmInfo()->getPrivateGlobalPrefix(); 250 if (LastSymbol && LastSymbol->getName().startswith(Prefix)) { 251 Frame.Begin = LastSymbol; 252 } else { 253 Frame.Begin = getContext().CreateTempSymbol(); 254 EmitLabel(Frame.Begin); 255 } 256} 257 258void MCStreamer::EmitCFIEndProc() { 259 EnsureValidFrame(); 260 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 261 EmitCFIEndProcImpl(*CurFrame); 262} 263 264void MCStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) { 265} 266 267void MCStreamer::RecordProcEnd(MCDwarfFrameInfo &Frame) { 268 Frame.End = getContext().CreateTempSymbol(); 269 EmitLabel(Frame.End); 270} 271 272MCSymbol *MCStreamer::EmitCFICommon() { 273 EnsureValidFrame(); 274 MCSymbol *Label = getContext().CreateTempSymbol(); 275 EmitLabel(Label); 276 return Label; 277} 278 279void MCStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) { 280 MCSymbol *Label = EmitCFICommon(); 281 MCCFIInstruction Instruction = 282 MCCFIInstruction::createDefCfa(Label, Register, Offset); 283 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 284 CurFrame->Instructions.push_back(Instruction); 285} 286 287void MCStreamer::EmitCFIDefCfaOffset(int64_t Offset) { 288 MCSymbol *Label = EmitCFICommon(); 289 MCCFIInstruction Instruction = 290 MCCFIInstruction::createDefCfaOffset(Label, Offset); 291 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 292 CurFrame->Instructions.push_back(Instruction); 293} 294 295void MCStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) { 296 MCSymbol *Label = EmitCFICommon(); 297 MCCFIInstruction Instruction = 298 MCCFIInstruction::createAdjustCfaOffset(Label, Adjustment); 299 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 300 CurFrame->Instructions.push_back(Instruction); 301} 302 303void MCStreamer::EmitCFIDefCfaRegister(int64_t Register) { 304 MCSymbol *Label = EmitCFICommon(); 305 MCCFIInstruction Instruction = 306 MCCFIInstruction::createDefCfaRegister(Label, Register); 307 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 308 CurFrame->Instructions.push_back(Instruction); 309} 310 311void MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) { 312 MCSymbol *Label = EmitCFICommon(); 313 MCCFIInstruction Instruction = 314 MCCFIInstruction::createOffset(Label, Register, Offset); 315 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 316 CurFrame->Instructions.push_back(Instruction); 317} 318 319void MCStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) { 320 MCSymbol *Label = EmitCFICommon(); 321 MCCFIInstruction Instruction = 322 MCCFIInstruction::createRelOffset(Label, Register, Offset); 323 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 324 CurFrame->Instructions.push_back(Instruction); 325} 326 327void MCStreamer::EmitCFIPersonality(const MCSymbol *Sym, 328 unsigned Encoding) { 329 EnsureValidFrame(); 330 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 331 CurFrame->Personality = Sym; 332 CurFrame->PersonalityEncoding = Encoding; 333} 334 335void MCStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) { 336 EnsureValidFrame(); 337 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 338 CurFrame->Lsda = Sym; 339 CurFrame->LsdaEncoding = Encoding; 340} 341 342void MCStreamer::EmitCFIRememberState() { 343 MCSymbol *Label = EmitCFICommon(); 344 MCCFIInstruction Instruction = MCCFIInstruction::createRememberState(Label); 345 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 346 CurFrame->Instructions.push_back(Instruction); 347} 348 349void MCStreamer::EmitCFIRestoreState() { 350 // FIXME: Error if there is no matching cfi_remember_state. 351 MCSymbol *Label = EmitCFICommon(); 352 MCCFIInstruction Instruction = MCCFIInstruction::createRestoreState(Label); 353 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 354 CurFrame->Instructions.push_back(Instruction); 355} 356 357void MCStreamer::EmitCFISameValue(int64_t Register) { 358 MCSymbol *Label = EmitCFICommon(); 359 MCCFIInstruction Instruction = 360 MCCFIInstruction::createSameValue(Label, Register); 361 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 362 CurFrame->Instructions.push_back(Instruction); 363} 364 365void MCStreamer::EmitCFIRestore(int64_t Register) { 366 MCSymbol *Label = EmitCFICommon(); 367 MCCFIInstruction Instruction = 368 MCCFIInstruction::createRestore(Label, Register); 369 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 370 CurFrame->Instructions.push_back(Instruction); 371} 372 373void MCStreamer::EmitCFIEscape(StringRef Values) { 374 MCSymbol *Label = EmitCFICommon(); 375 MCCFIInstruction Instruction = MCCFIInstruction::createEscape(Label, Values); 376 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 377 CurFrame->Instructions.push_back(Instruction); 378} 379 380void MCStreamer::EmitCFISignalFrame() { 381 EnsureValidFrame(); 382 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 383 CurFrame->IsSignalFrame = true; 384} 385 386void MCStreamer::EmitCFIUndefined(int64_t Register) { 387 MCSymbol *Label = EmitCFICommon(); 388 MCCFIInstruction Instruction = 389 MCCFIInstruction::createUndefined(Label, Register); 390 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 391 CurFrame->Instructions.push_back(Instruction); 392} 393 394void MCStreamer::EmitCFIRegister(int64_t Register1, int64_t Register2) { 395 MCSymbol *Label = EmitCFICommon(); 396 MCCFIInstruction Instruction = 397 MCCFIInstruction::createRegister(Label, Register1, Register2); 398 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 399 CurFrame->Instructions.push_back(Instruction); 400} 401 402void MCStreamer::EmitCFIWindowSave() { 403 MCSymbol *Label = EmitCFICommon(); 404 MCCFIInstruction Instruction = 405 MCCFIInstruction::createWindowSave(Label); 406 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 407 CurFrame->Instructions.push_back(Instruction); 408} 409 410void MCStreamer::setCurrentW64UnwindInfo(MCWin64EHUnwindInfo *Frame) { 411 W64UnwindInfos.push_back(Frame); 412 CurrentW64UnwindInfo = W64UnwindInfos.back(); 413} 414 415void MCStreamer::EnsureValidW64UnwindInfo() { 416 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; 417 if (!CurFrame || CurFrame->End) 418 report_fatal_error("No open Win64 EH frame function!"); 419} 420 421void MCStreamer::EmitWin64EHStartProc(const MCSymbol *Symbol) { 422 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; 423 if (CurFrame && !CurFrame->End) 424 report_fatal_error("Starting a function before ending the previous one!"); 425 MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo; 426 Frame->Begin = getContext().CreateTempSymbol(); 427 Frame->Function = Symbol; 428 EmitLabel(Frame->Begin); 429 setCurrentW64UnwindInfo(Frame); 430} 431 432void MCStreamer::EmitWin64EHEndProc() { 433 EnsureValidW64UnwindInfo(); 434 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; 435 if (CurFrame->ChainedParent) 436 report_fatal_error("Not all chained regions terminated!"); 437 CurFrame->End = getContext().CreateTempSymbol(); 438 EmitLabel(CurFrame->End); 439} 440 441void MCStreamer::EmitWin64EHStartChained() { 442 EnsureValidW64UnwindInfo(); 443 MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo; 444 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; 445 Frame->Begin = getContext().CreateTempSymbol(); 446 Frame->Function = CurFrame->Function; 447 Frame->ChainedParent = CurFrame; 448 EmitLabel(Frame->Begin); 449 setCurrentW64UnwindInfo(Frame); 450} 451 452void MCStreamer::EmitWin64EHEndChained() { 453 EnsureValidW64UnwindInfo(); 454 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; 455 if (!CurFrame->ChainedParent) 456 report_fatal_error("End of a chained region outside a chained region!"); 457 CurFrame->End = getContext().CreateTempSymbol(); 458 EmitLabel(CurFrame->End); 459 CurrentW64UnwindInfo = CurFrame->ChainedParent; 460} 461 462void MCStreamer::EmitWin64EHHandler(const MCSymbol *Sym, bool Unwind, 463 bool Except) { 464 EnsureValidW64UnwindInfo(); 465 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; 466 if (CurFrame->ChainedParent) 467 report_fatal_error("Chained unwind areas can't have handlers!"); 468 CurFrame->ExceptionHandler = Sym; 469 if (!Except && !Unwind) 470 report_fatal_error("Don't know what kind of handler this is!"); 471 if (Unwind) 472 CurFrame->HandlesUnwind = true; 473 if (Except) 474 CurFrame->HandlesExceptions = true; 475} 476 477void MCStreamer::EmitWin64EHHandlerData() { 478 EnsureValidW64UnwindInfo(); 479 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; 480 if (CurFrame->ChainedParent) 481 report_fatal_error("Chained unwind areas can't have handlers!"); 482} 483 484void MCStreamer::EmitWin64EHPushReg(unsigned Register) { 485 EnsureValidW64UnwindInfo(); 486 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; 487 MCSymbol *Label = getContext().CreateTempSymbol(); 488 MCWin64EHInstruction Inst(Win64EH::UOP_PushNonVol, Label, Register); 489 EmitLabel(Label); 490 CurFrame->Instructions.push_back(Inst); 491} 492 493void MCStreamer::EmitWin64EHSetFrame(unsigned Register, unsigned Offset) { 494 EnsureValidW64UnwindInfo(); 495 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; 496 if (CurFrame->LastFrameInst >= 0) 497 report_fatal_error("Frame register and offset already specified!"); 498 if (Offset & 0x0F) 499 report_fatal_error("Misaligned frame pointer offset!"); 500 MCSymbol *Label = getContext().CreateTempSymbol(); 501 MCWin64EHInstruction Inst(Win64EH::UOP_SetFPReg, Label, Register, Offset); 502 EmitLabel(Label); 503 CurFrame->LastFrameInst = CurFrame->Instructions.size(); 504 CurFrame->Instructions.push_back(Inst); 505} 506 507void 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 518void 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 531void 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 544void 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 555void MCStreamer::EmitWin64EHEndProlog() { 556 EnsureValidW64UnwindInfo(); 557 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; 558 CurFrame->PrologEnd = getContext().CreateTempSymbol(); 559 EmitLabel(CurFrame->PrologEnd); 560} 561 562void MCStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) { 563 llvm_unreachable("This file format doesn't support this directive"); 564} 565 566void MCStreamer::EmitFnStart() { 567 errs() << "Not implemented yet\n"; 568 abort(); 569} 570 571void MCStreamer::EmitFnEnd() { 572 errs() << "Not implemented yet\n"; 573 abort(); 574} 575 576void MCStreamer::EmitCantUnwind() { 577 errs() << "Not implemented yet\n"; 578 abort(); 579} 580 581void MCStreamer::EmitHandlerData() { 582 errs() << "Not implemented yet\n"; 583 abort(); 584} 585 586void MCStreamer::EmitPersonality(const MCSymbol *Personality) { 587 errs() << "Not implemented yet\n"; 588 abort(); 589} 590 591void MCStreamer::EmitSetFP(unsigned FpReg, unsigned SpReg, int64_t Offset) { 592 errs() << "Not implemented yet\n"; 593 abort(); 594} 595 596void MCStreamer::EmitPad(int64_t Offset) { 597 errs() << "Not implemented yet\n"; 598 abort(); 599} 600 601void MCStreamer::EmitRegSave(const SmallVectorImpl<unsigned> &RegList, bool) { 602 errs() << "Not implemented yet\n"; 603 abort(); 604} 605 606void MCStreamer::EmitTCEntry(const MCSymbol &S) { 607 llvm_unreachable("Unsupported method"); 608} 609 610/// EmitRawText - If this file is backed by an assembly streamer, this dumps 611/// the specified string in the output .s file. This capability is 612/// indicated by the hasRawTextSupport() predicate. 613void MCStreamer::EmitRawText(StringRef String) { 614 errs() << "EmitRawText called on an MCStreamer that doesn't support it, " 615 " something must not be fully mc'ized\n"; 616 abort(); 617} 618 619void MCStreamer::EmitRawText(const Twine &T) { 620 SmallString<128> Str; 621 T.toVector(Str); 622 EmitRawText(Str.str()); 623} 624 625void MCStreamer::EmitFrames(MCAsmBackend *MAB, bool usingCFI) { 626 if (!getNumFrameInfos()) 627 return; 628 629 if (EmitEHFrame) 630 MCDwarfFrameEmitter::Emit(*this, MAB, usingCFI, true); 631 632 if (EmitDebugFrame) 633 MCDwarfFrameEmitter::Emit(*this, MAB, usingCFI, false); 634} 635 636void MCStreamer::EmitW64Tables() { 637 if (!getNumW64UnwindInfos()) 638 return; 639 640 MCWin64EHUnwindEmitter::Emit(*this); 641} 642 643void MCStreamer::Finish() { 644 if (!FrameInfos.empty() && !FrameInfos.back().End) 645 report_fatal_error("Unfinished frame!"); 646 647 FinishImpl(); 648} 649 650MCSymbolData &MCStreamer::getOrCreateSymbolData(MCSymbol *Symbol) { 651 report_fatal_error("Not supported!"); 652 return *(static_cast<MCSymbolData*>(0)); 653} 654