MCStreamer.cpp revision da11df0c22f5d0ba2e2be3ae4a7076c806233db8
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 if (!MAB) return; 78 for (std::vector<MCDwarfFrameInfo>::iterator I = FrameInfos.begin(), 79 E = FrameInfos.end(); I != E; ++I) 80 I->CompactUnwindEncoding = 81 MAB->generateCompactUnwindEncoding(I->Instructions); 82} 83 84void MCStreamer::EmitDwarfSetLineAddr(int64_t LineDelta, 85 const MCSymbol *Label, int PointerSize) { 86 // emit the sequence to set the address 87 EmitIntValue(dwarf::DW_LNS_extended_op, 1); 88 EmitULEB128IntValue(PointerSize + 1); 89 EmitIntValue(dwarf::DW_LNE_set_address, 1); 90 EmitSymbolValue(Label, PointerSize); 91 92 // emit the sequence for the LineDelta (from 1) and a zero address delta. 93 MCDwarfLineAddr::Emit(this, LineDelta, 0); 94} 95 96/// EmitIntValue - Special case of EmitValue that avoids the client having to 97/// pass in a MCExpr for constant integers. 98void MCStreamer::EmitIntValue(uint64_t Value, unsigned Size) { 99 assert(Size <= 8 && "Invalid size"); 100 assert((isUIntN(8 * Size, Value) || isIntN(8 * Size, Value)) && 101 "Invalid size"); 102 char buf[8]; 103 const bool isLittleEndian = Context.getAsmInfo()->isLittleEndian(); 104 for (unsigned i = 0; i != Size; ++i) { 105 unsigned index = isLittleEndian ? i : (Size - i - 1); 106 buf[i] = uint8_t(Value >> (index * 8)); 107 } 108 EmitBytes(StringRef(buf, Size)); 109} 110 111/// EmitULEB128Value - Special case of EmitULEB128Value that avoids the 112/// client having to pass in a MCExpr for constant integers. 113void MCStreamer::EmitULEB128IntValue(uint64_t Value, unsigned Padding) { 114 SmallString<128> Tmp; 115 raw_svector_ostream OSE(Tmp); 116 encodeULEB128(Value, OSE, Padding); 117 EmitBytes(OSE.str()); 118} 119 120/// EmitSLEB128Value - Special case of EmitSLEB128Value that avoids the 121/// client having to pass in a MCExpr for constant integers. 122void MCStreamer::EmitSLEB128IntValue(int64_t Value) { 123 SmallString<128> Tmp; 124 raw_svector_ostream OSE(Tmp); 125 encodeSLEB128(Value, OSE); 126 EmitBytes(OSE.str()); 127} 128 129void MCStreamer::EmitAbsValue(const MCExpr *Value, unsigned Size) { 130 const MCExpr *ABS = ForceExpAbs(Value); 131 EmitValue(ABS, Size); 132} 133 134 135void MCStreamer::EmitValue(const MCExpr *Value, unsigned Size) { 136 EmitValueImpl(Value, Size); 137} 138 139void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size) { 140 EmitValueImpl(MCSymbolRefExpr::Create(Sym, getContext()), Size); 141} 142 143void MCStreamer::EmitGPRel64Value(const MCExpr *Value) { 144 report_fatal_error("unsupported directive in streamer"); 145} 146 147void MCStreamer::EmitGPRel32Value(const MCExpr *Value) { 148 report_fatal_error("unsupported directive in streamer"); 149} 150 151/// EmitFill - Emit NumBytes bytes worth of the value specified by 152/// FillValue. This implements directives such as '.space'. 153void MCStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue) { 154 const MCExpr *E = MCConstantExpr::Create(FillValue, getContext()); 155 for (uint64_t i = 0, e = NumBytes; i != e; ++i) 156 EmitValue(E, 1); 157} 158 159/// The implementation in this class just redirects to EmitFill. 160void MCStreamer::EmitZeros(uint64_t NumBytes) { 161 EmitFill(NumBytes, 0); 162} 163 164bool MCStreamer::EmitDwarfFileDirective(unsigned FileNo, 165 StringRef Directory, 166 StringRef Filename, unsigned CUID) { 167 return getContext().GetDwarfFile(Directory, Filename, FileNo, CUID) == 0; 168} 169 170void MCStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line, 171 unsigned Column, unsigned Flags, 172 unsigned Isa, 173 unsigned Discriminator, 174 StringRef FileName) { 175 getContext().setCurrentDwarfLoc(FileNo, Line, Column, Flags, Isa, 176 Discriminator); 177} 178 179MCDwarfFrameInfo *MCStreamer::getCurrentFrameInfo() { 180 if (FrameInfos.empty()) 181 return 0; 182 return &FrameInfos.back(); 183} 184 185void MCStreamer::EnsureValidFrame() { 186 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 187 if (!CurFrame || CurFrame->End) 188 report_fatal_error("No open frame"); 189} 190 191void MCStreamer::EmitEHSymAttributes(const MCSymbol *Symbol, 192 MCSymbol *EHSymbol) { 193} 194 195void MCStreamer::EmitLabel(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::EmitDebugLabel(MCSymbol *Symbol) { 203 assert(!Symbol->isVariable() && "Cannot emit a variable symbol!"); 204 assert(getCurrentSection().first && "Cannot emit before setting section!"); 205 Symbol->setSection(*getCurrentSection().first); 206 LastSymbol = Symbol; 207} 208 209void MCStreamer::EmitCompactUnwindEncoding(uint32_t CompactUnwindEncoding) { 210 EnsureValidFrame(); 211 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 212 CurFrame->CompactUnwindEncoding = CompactUnwindEncoding; 213} 214 215void MCStreamer::EmitCFISections(bool EH, bool Debug) { 216 assert(EH || Debug); 217 EmitEHFrame = EH; 218 EmitDebugFrame = Debug; 219} 220 221void MCStreamer::EmitCFIStartProc() { 222 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 223 if (CurFrame && !CurFrame->End) 224 report_fatal_error("Starting a frame before finishing the previous one!"); 225 226 MCDwarfFrameInfo Frame; 227 EmitCFIStartProcImpl(Frame); 228 229 FrameInfos.push_back(Frame); 230} 231 232void MCStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) { 233} 234 235void MCStreamer::RecordProcStart(MCDwarfFrameInfo &Frame) { 236 Frame.Function = LastSymbol; 237 // If the function is externally visible, we need to create a local 238 // symbol to avoid relocations. 239 StringRef Prefix = getContext().getAsmInfo()->getPrivateGlobalPrefix(); 240 if (LastSymbol && LastSymbol->getName().startswith(Prefix)) { 241 Frame.Begin = LastSymbol; 242 } else { 243 Frame.Begin = getContext().CreateTempSymbol(); 244 EmitLabel(Frame.Begin); 245 } 246} 247 248void MCStreamer::EmitCFIEndProc() { 249 EnsureValidFrame(); 250 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 251 EmitCFIEndProcImpl(*CurFrame); 252} 253 254void MCStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) { 255} 256 257void MCStreamer::RecordProcEnd(MCDwarfFrameInfo &Frame) { 258 Frame.End = getContext().CreateTempSymbol(); 259 EmitLabel(Frame.End); 260} 261 262MCSymbol *MCStreamer::EmitCFICommon() { 263 EnsureValidFrame(); 264 MCSymbol *Label = getContext().CreateTempSymbol(); 265 EmitLabel(Label); 266 return Label; 267} 268 269void MCStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) { 270 MCSymbol *Label = EmitCFICommon(); 271 MCCFIInstruction Instruction = 272 MCCFIInstruction::createDefCfa(Label, Register, Offset); 273 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 274 CurFrame->Instructions.push_back(Instruction); 275} 276 277void MCStreamer::EmitCFIDefCfaOffset(int64_t Offset) { 278 MCSymbol *Label = EmitCFICommon(); 279 MCCFIInstruction Instruction = 280 MCCFIInstruction::createDefCfaOffset(Label, Offset); 281 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 282 CurFrame->Instructions.push_back(Instruction); 283} 284 285void MCStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) { 286 MCSymbol *Label = EmitCFICommon(); 287 MCCFIInstruction Instruction = 288 MCCFIInstruction::createAdjustCfaOffset(Label, Adjustment); 289 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 290 CurFrame->Instructions.push_back(Instruction); 291} 292 293void MCStreamer::EmitCFIDefCfaRegister(int64_t Register) { 294 MCSymbol *Label = EmitCFICommon(); 295 MCCFIInstruction Instruction = 296 MCCFIInstruction::createDefCfaRegister(Label, Register); 297 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 298 CurFrame->Instructions.push_back(Instruction); 299} 300 301void MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) { 302 MCSymbol *Label = EmitCFICommon(); 303 MCCFIInstruction Instruction = 304 MCCFIInstruction::createOffset(Label, Register, Offset); 305 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 306 CurFrame->Instructions.push_back(Instruction); 307} 308 309void MCStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) { 310 MCSymbol *Label = EmitCFICommon(); 311 MCCFIInstruction Instruction = 312 MCCFIInstruction::createRelOffset(Label, Register, Offset); 313 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 314 CurFrame->Instructions.push_back(Instruction); 315} 316 317void MCStreamer::EmitCFIPersonality(const MCSymbol *Sym, 318 unsigned Encoding) { 319 EnsureValidFrame(); 320 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 321 CurFrame->Personality = Sym; 322 CurFrame->PersonalityEncoding = Encoding; 323} 324 325void MCStreamer::EmitCFILsda(const MCSymbol *Sym, unsigned Encoding) { 326 EnsureValidFrame(); 327 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 328 CurFrame->Lsda = Sym; 329 CurFrame->LsdaEncoding = Encoding; 330} 331 332void MCStreamer::EmitCFIRememberState() { 333 MCSymbol *Label = EmitCFICommon(); 334 MCCFIInstruction Instruction = MCCFIInstruction::createRememberState(Label); 335 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 336 CurFrame->Instructions.push_back(Instruction); 337} 338 339void MCStreamer::EmitCFIRestoreState() { 340 // FIXME: Error if there is no matching cfi_remember_state. 341 MCSymbol *Label = EmitCFICommon(); 342 MCCFIInstruction Instruction = MCCFIInstruction::createRestoreState(Label); 343 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 344 CurFrame->Instructions.push_back(Instruction); 345} 346 347void MCStreamer::EmitCFISameValue(int64_t Register) { 348 MCSymbol *Label = EmitCFICommon(); 349 MCCFIInstruction Instruction = 350 MCCFIInstruction::createSameValue(Label, Register); 351 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 352 CurFrame->Instructions.push_back(Instruction); 353} 354 355void MCStreamer::EmitCFIRestore(int64_t Register) { 356 MCSymbol *Label = EmitCFICommon(); 357 MCCFIInstruction Instruction = 358 MCCFIInstruction::createRestore(Label, Register); 359 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 360 CurFrame->Instructions.push_back(Instruction); 361} 362 363void MCStreamer::EmitCFIEscape(StringRef Values) { 364 MCSymbol *Label = EmitCFICommon(); 365 MCCFIInstruction Instruction = MCCFIInstruction::createEscape(Label, Values); 366 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 367 CurFrame->Instructions.push_back(Instruction); 368} 369 370void MCStreamer::EmitCFISignalFrame() { 371 EnsureValidFrame(); 372 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 373 CurFrame->IsSignalFrame = true; 374} 375 376void MCStreamer::EmitCFIUndefined(int64_t Register) { 377 MCSymbol *Label = EmitCFICommon(); 378 MCCFIInstruction Instruction = 379 MCCFIInstruction::createUndefined(Label, Register); 380 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 381 CurFrame->Instructions.push_back(Instruction); 382} 383 384void MCStreamer::EmitCFIRegister(int64_t Register1, int64_t Register2) { 385 MCSymbol *Label = EmitCFICommon(); 386 MCCFIInstruction Instruction = 387 MCCFIInstruction::createRegister(Label, Register1, Register2); 388 MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo(); 389 CurFrame->Instructions.push_back(Instruction); 390} 391 392void MCStreamer::setCurrentW64UnwindInfo(MCWin64EHUnwindInfo *Frame) { 393 W64UnwindInfos.push_back(Frame); 394 CurrentW64UnwindInfo = W64UnwindInfos.back(); 395} 396 397void MCStreamer::EnsureValidW64UnwindInfo() { 398 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; 399 if (!CurFrame || CurFrame->End) 400 report_fatal_error("No open Win64 EH frame function!"); 401} 402 403void MCStreamer::EmitWin64EHStartProc(const MCSymbol *Symbol) { 404 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; 405 if (CurFrame && !CurFrame->End) 406 report_fatal_error("Starting a function before ending the previous one!"); 407 MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo; 408 Frame->Begin = getContext().CreateTempSymbol(); 409 Frame->Function = Symbol; 410 EmitLabel(Frame->Begin); 411 setCurrentW64UnwindInfo(Frame); 412} 413 414void MCStreamer::EmitWin64EHEndProc() { 415 EnsureValidW64UnwindInfo(); 416 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; 417 if (CurFrame->ChainedParent) 418 report_fatal_error("Not all chained regions terminated!"); 419 CurFrame->End = getContext().CreateTempSymbol(); 420 EmitLabel(CurFrame->End); 421} 422 423void MCStreamer::EmitWin64EHStartChained() { 424 EnsureValidW64UnwindInfo(); 425 MCWin64EHUnwindInfo *Frame = new MCWin64EHUnwindInfo; 426 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; 427 Frame->Begin = getContext().CreateTempSymbol(); 428 Frame->Function = CurFrame->Function; 429 Frame->ChainedParent = CurFrame; 430 EmitLabel(Frame->Begin); 431 setCurrentW64UnwindInfo(Frame); 432} 433 434void MCStreamer::EmitWin64EHEndChained() { 435 EnsureValidW64UnwindInfo(); 436 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; 437 if (!CurFrame->ChainedParent) 438 report_fatal_error("End of a chained region outside a chained region!"); 439 CurFrame->End = getContext().CreateTempSymbol(); 440 EmitLabel(CurFrame->End); 441 CurrentW64UnwindInfo = CurFrame->ChainedParent; 442} 443 444void MCStreamer::EmitWin64EHHandler(const MCSymbol *Sym, bool Unwind, 445 bool Except) { 446 EnsureValidW64UnwindInfo(); 447 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; 448 if (CurFrame->ChainedParent) 449 report_fatal_error("Chained unwind areas can't have handlers!"); 450 CurFrame->ExceptionHandler = Sym; 451 if (!Except && !Unwind) 452 report_fatal_error("Don't know what kind of handler this is!"); 453 if (Unwind) 454 CurFrame->HandlesUnwind = true; 455 if (Except) 456 CurFrame->HandlesExceptions = true; 457} 458 459void MCStreamer::EmitWin64EHHandlerData() { 460 EnsureValidW64UnwindInfo(); 461 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; 462 if (CurFrame->ChainedParent) 463 report_fatal_error("Chained unwind areas can't have handlers!"); 464} 465 466void MCStreamer::EmitWin64EHPushReg(unsigned Register) { 467 EnsureValidW64UnwindInfo(); 468 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; 469 MCSymbol *Label = getContext().CreateTempSymbol(); 470 MCWin64EHInstruction Inst(Win64EH::UOP_PushNonVol, Label, Register); 471 EmitLabel(Label); 472 CurFrame->Instructions.push_back(Inst); 473} 474 475void MCStreamer::EmitWin64EHSetFrame(unsigned Register, unsigned Offset) { 476 EnsureValidW64UnwindInfo(); 477 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; 478 if (CurFrame->LastFrameInst >= 0) 479 report_fatal_error("Frame register and offset already specified!"); 480 if (Offset & 0x0F) 481 report_fatal_error("Misaligned frame pointer offset!"); 482 MCSymbol *Label = getContext().CreateTempSymbol(); 483 MCWin64EHInstruction Inst(Win64EH::UOP_SetFPReg, Label, Register, Offset); 484 EmitLabel(Label); 485 CurFrame->LastFrameInst = CurFrame->Instructions.size(); 486 CurFrame->Instructions.push_back(Inst); 487} 488 489void MCStreamer::EmitWin64EHAllocStack(unsigned Size) { 490 EnsureValidW64UnwindInfo(); 491 if (Size & 7) 492 report_fatal_error("Misaligned stack allocation!"); 493 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; 494 MCSymbol *Label = getContext().CreateTempSymbol(); 495 MCWin64EHInstruction Inst(Label, Size); 496 EmitLabel(Label); 497 CurFrame->Instructions.push_back(Inst); 498} 499 500void MCStreamer::EmitWin64EHSaveReg(unsigned Register, unsigned Offset) { 501 EnsureValidW64UnwindInfo(); 502 if (Offset & 7) 503 report_fatal_error("Misaligned saved register offset!"); 504 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; 505 MCSymbol *Label = getContext().CreateTempSymbol(); 506 MCWin64EHInstruction Inst( 507 Offset > 512*1024-8 ? Win64EH::UOP_SaveNonVolBig : Win64EH::UOP_SaveNonVol, 508 Label, Register, Offset); 509 EmitLabel(Label); 510 CurFrame->Instructions.push_back(Inst); 511} 512 513void MCStreamer::EmitWin64EHSaveXMM(unsigned Register, unsigned Offset) { 514 EnsureValidW64UnwindInfo(); 515 if (Offset & 0x0F) 516 report_fatal_error("Misaligned saved vector register offset!"); 517 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; 518 MCSymbol *Label = getContext().CreateTempSymbol(); 519 MCWin64EHInstruction Inst( 520 Offset > 512*1024-16 ? Win64EH::UOP_SaveXMM128Big : Win64EH::UOP_SaveXMM128, 521 Label, Register, Offset); 522 EmitLabel(Label); 523 CurFrame->Instructions.push_back(Inst); 524} 525 526void MCStreamer::EmitWin64EHPushFrame(bool Code) { 527 EnsureValidW64UnwindInfo(); 528 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; 529 if (CurFrame->Instructions.size() > 0) 530 report_fatal_error("If present, PushMachFrame must be the first UOP"); 531 MCSymbol *Label = getContext().CreateTempSymbol(); 532 MCWin64EHInstruction Inst(Win64EH::UOP_PushMachFrame, Label, Code); 533 EmitLabel(Label); 534 CurFrame->Instructions.push_back(Inst); 535} 536 537void MCStreamer::EmitWin64EHEndProlog() { 538 EnsureValidW64UnwindInfo(); 539 MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo; 540 CurFrame->PrologEnd = getContext().CreateTempSymbol(); 541 EmitLabel(CurFrame->PrologEnd); 542} 543 544void MCStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) { 545 llvm_unreachable("This file format doesn't support this directive"); 546} 547 548void MCStreamer::EmitFnStart() { 549 errs() << "Not implemented yet\n"; 550 abort(); 551} 552 553void MCStreamer::EmitFnEnd() { 554 errs() << "Not implemented yet\n"; 555 abort(); 556} 557 558void MCStreamer::EmitCantUnwind() { 559 errs() << "Not implemented yet\n"; 560 abort(); 561} 562 563void MCStreamer::EmitHandlerData() { 564 errs() << "Not implemented yet\n"; 565 abort(); 566} 567 568void MCStreamer::EmitPersonality(const MCSymbol *Personality) { 569 errs() << "Not implemented yet\n"; 570 abort(); 571} 572 573void MCStreamer::EmitSetFP(unsigned FpReg, unsigned SpReg, int64_t Offset) { 574 errs() << "Not implemented yet\n"; 575 abort(); 576} 577 578void MCStreamer::EmitPad(int64_t Offset) { 579 errs() << "Not implemented yet\n"; 580 abort(); 581} 582 583void MCStreamer::EmitRegSave(const SmallVectorImpl<unsigned> &RegList, bool) { 584 errs() << "Not implemented yet\n"; 585 abort(); 586} 587 588void MCStreamer::EmitTCEntry(const MCSymbol &S) { 589 llvm_unreachable("Unsupported method"); 590} 591 592/// EmitRawText - If this file is backed by an assembly streamer, this dumps 593/// the specified string in the output .s file. This capability is 594/// indicated by the hasRawTextSupport() predicate. 595void MCStreamer::EmitRawText(StringRef String) { 596 errs() << "EmitRawText called on an MCStreamer that doesn't support it, " 597 " something must not be fully mc'ized\n"; 598 abort(); 599} 600 601void MCStreamer::EmitRawText(const Twine &T) { 602 SmallString<128> Str; 603 T.toVector(Str); 604 EmitRawText(Str.str()); 605} 606 607void MCStreamer::EmitFrames(MCAsmBackend *MAB, bool usingCFI) { 608 if (!getNumFrameInfos()) 609 return; 610 611 if (EmitEHFrame) 612 MCDwarfFrameEmitter::Emit(*this, MAB, usingCFI, true); 613 614 if (EmitDebugFrame) 615 MCDwarfFrameEmitter::Emit(*this, MAB, usingCFI, false); 616} 617 618void MCStreamer::EmitW64Tables() { 619 if (!getNumW64UnwindInfos()) 620 return; 621 622 MCWin64EHUnwindEmitter::Emit(*this); 623} 624 625void MCStreamer::Finish() { 626 if (!FrameInfos.empty() && !FrameInfos.back().End) 627 report_fatal_error("Unfinished frame!"); 628 629 FinishImpl(); 630} 631 632MCSymbolData &MCStreamer::getOrCreateSymbolData(MCSymbol *Symbol) { 633 report_fatal_error("Not supported!"); 634 return *(static_cast<MCSymbolData*>(0)); 635} 636