MCAssembler.h revision a8bf473fb15bbedc78144ec57438f884616283b0
1//===- MCAssembler.h - Object File Generation -------------------*- C++ -*-===// 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#ifndef LLVM_MC_MCASSEMBLER_H 11#define LLVM_MC_MCASSEMBLER_H 12 13#include "llvm/ADT/DenseMap.h" 14#include "llvm/ADT/SmallString.h" 15#include "llvm/ADT/ilist.h" 16#include "llvm/ADT/ilist_node.h" 17#include "llvm/Support/Casting.h" 18#include "llvm/MC/MCFixup.h" 19#include "llvm/MC/MCInst.h" 20#include "llvm/System/DataTypes.h" 21#include <vector> // FIXME: Shouldn't be needed. 22 23namespace llvm { 24class raw_ostream; 25class MCAsmLayout; 26class MCAssembler; 27class MCBinaryExpr; 28class MCContext; 29class MCCodeEmitter; 30class MCExpr; 31class MCFragment; 32class MCObjectWriter; 33class MCSection; 34class MCSectionData; 35class MCSymbol; 36class MCSymbolData; 37class MCValue; 38class TargetAsmBackend; 39 40class MCFragment : public ilist_node<MCFragment> { 41 friend class MCAsmLayout; 42 43 MCFragment(const MCFragment&); // DO NOT IMPLEMENT 44 void operator=(const MCFragment&); // DO NOT IMPLEMENT 45 46public: 47 enum FragmentType { 48 FT_Align, 49 FT_Data, 50 FT_Fill, 51 FT_Inst, 52 FT_Org 53 }; 54 55private: 56 FragmentType Kind; 57 58 /// Parent - The data for the section this fragment is in. 59 MCSectionData *Parent; 60 61 /// Atom - The atom this fragment is in, as represented by it's defining 62 /// symbol. Atom's are only used by backends which set 63 /// \see MCAsmBackend::hasReliableSymbolDifference(). 64 MCSymbolData *Atom; 65 66 /// @name Assembler Backend Data 67 /// @{ 68 // 69 // FIXME: This could all be kept private to the assembler implementation. 70 71 /// Offset - The offset of this fragment in its section. This is ~0 until 72 /// initialized. 73 uint64_t Offset; 74 75 /// EffectiveSize - The compute size of this section. This is ~0 until 76 /// initialized. 77 uint64_t EffectiveSize; 78 79 /// LayoutOrder - The global layout order of this fragment. This is the index 80 /// across all fragments in the file, not just within the section. 81 unsigned LayoutOrder; 82 83 /// @} 84 85protected: 86 MCFragment(FragmentType _Kind, MCSectionData *_Parent = 0); 87 88public: 89 // Only for sentinel. 90 MCFragment(); 91 virtual ~MCFragment(); 92 93 FragmentType getKind() const { return Kind; } 94 95 MCSectionData *getParent() const { return Parent; } 96 void setParent(MCSectionData *Value) { Parent = Value; } 97 98 MCSymbolData *getAtom() const { return Atom; } 99 void setAtom(MCSymbolData *Value) { Atom = Value; } 100 101 unsigned getLayoutOrder() const { return LayoutOrder; } 102 void setLayoutOrder(unsigned Value) { LayoutOrder = Value; } 103 104 static bool classof(const MCFragment *O) { return true; } 105 106 void dump(); 107}; 108 109class MCDataFragment : public MCFragment { 110 SmallString<32> Contents; 111 112 /// Fixups - The list of fixups in this fragment. 113 std::vector<MCFixup> Fixups; 114 115public: 116 typedef std::vector<MCFixup>::const_iterator const_fixup_iterator; 117 typedef std::vector<MCFixup>::iterator fixup_iterator; 118 119public: 120 MCDataFragment(MCSectionData *SD = 0) : MCFragment(FT_Data, SD) {} 121 122 /// @name Accessors 123 /// @{ 124 125 SmallString<32> &getContents() { return Contents; } 126 const SmallString<32> &getContents() const { return Contents; } 127 128 /// @} 129 /// @name Fixup Access 130 /// @{ 131 132 void addFixup(MCFixup Fixup) { 133 // Enforce invariant that fixups are in offset order. 134 assert((Fixups.empty() || Fixup.getOffset() > Fixups.back().getOffset()) && 135 "Fixups must be added in order!"); 136 Fixups.push_back(Fixup); 137 } 138 139 std::vector<MCFixup> &getFixups() { return Fixups; } 140 const std::vector<MCFixup> &getFixups() const { return Fixups; } 141 142 fixup_iterator fixup_begin() { return Fixups.begin(); } 143 const_fixup_iterator fixup_begin() const { return Fixups.begin(); } 144 145 fixup_iterator fixup_end() {return Fixups.end();} 146 const_fixup_iterator fixup_end() const {return Fixups.end();} 147 148 size_t fixup_size() const { return Fixups.size(); } 149 150 /// @} 151 152 static bool classof(const MCFragment *F) { 153 return F->getKind() == MCFragment::FT_Data; 154 } 155 static bool classof(const MCDataFragment *) { return true; } 156}; 157 158// FIXME: This current incarnation of MCInstFragment doesn't make much sense, as 159// it is almost entirely a duplicate of MCDataFragment. If we decide to stick 160// with this approach (as opposed to making MCInstFragment a very light weight 161// object with just the MCInst and a code size, then we should just change 162// MCDataFragment to have an optional MCInst at its end. 163class MCInstFragment : public MCFragment { 164 /// Inst - The instruction this is a fragment for. 165 MCInst Inst; 166 167 /// InstSize - The size of the currently encoded instruction. 168 SmallString<8> Code; 169 170 /// Fixups - The list of fixups in this fragment. 171 SmallVector<MCFixup, 1> Fixups; 172 173public: 174 typedef SmallVectorImpl<MCFixup>::const_iterator const_fixup_iterator; 175 typedef SmallVectorImpl<MCFixup>::iterator fixup_iterator; 176 177public: 178 MCInstFragment(MCInst _Inst, MCSectionData *SD = 0) 179 : MCFragment(FT_Inst, SD), Inst(_Inst) { 180 } 181 182 /// @name Accessors 183 /// @{ 184 185 SmallVectorImpl<char> &getCode() { return Code; } 186 const SmallVectorImpl<char> &getCode() const { return Code; } 187 188 unsigned getInstSize() const { return Code.size(); } 189 190 MCInst &getInst() { return Inst; } 191 const MCInst &getInst() const { return Inst; } 192 193 void setInst(MCInst Value) { Inst = Value; } 194 195 /// @} 196 /// @name Fixup Access 197 /// @{ 198 199 SmallVectorImpl<MCFixup> &getFixups() { return Fixups; } 200 const SmallVectorImpl<MCFixup> &getFixups() const { return Fixups; } 201 202 fixup_iterator fixup_begin() { return Fixups.begin(); } 203 const_fixup_iterator fixup_begin() const { return Fixups.begin(); } 204 205 fixup_iterator fixup_end() {return Fixups.end();} 206 const_fixup_iterator fixup_end() const {return Fixups.end();} 207 208 size_t fixup_size() const { return Fixups.size(); } 209 210 /// @} 211 212 static bool classof(const MCFragment *F) { 213 return F->getKind() == MCFragment::FT_Inst; 214 } 215 static bool classof(const MCInstFragment *) { return true; } 216}; 217 218class MCAlignFragment : public MCFragment { 219 /// Alignment - The alignment to ensure, in bytes. 220 unsigned Alignment; 221 222 /// Value - Value to use for filling padding bytes. 223 int64_t Value; 224 225 /// ValueSize - The size of the integer (in bytes) of \arg Value. 226 unsigned ValueSize; 227 228 /// MaxBytesToEmit - The maximum number of bytes to emit; if the alignment 229 /// cannot be satisfied in this width then this fragment is ignored. 230 unsigned MaxBytesToEmit; 231 232 /// EmitNops - Flag to indicate that (optimal) NOPs should be emitted instead 233 /// of using the provided value. The exact interpretation of this flag is 234 /// target dependent. 235 bool EmitNops : 1; 236 237 /// OnlyAlignAddress - Flag to indicate that this align is only used to adjust 238 /// the address space size of a section and that it should not be included as 239 /// part of the section size. This flag can only be used on the last fragment 240 /// in a section. 241 bool OnlyAlignAddress : 1; 242 243public: 244 MCAlignFragment(unsigned _Alignment, int64_t _Value, unsigned _ValueSize, 245 unsigned _MaxBytesToEmit, MCSectionData *SD = 0) 246 : MCFragment(FT_Align, SD), Alignment(_Alignment), 247 Value(_Value),ValueSize(_ValueSize), 248 MaxBytesToEmit(_MaxBytesToEmit), EmitNops(false), 249 OnlyAlignAddress(false) {} 250 251 /// @name Accessors 252 /// @{ 253 254 unsigned getAlignment() const { return Alignment; } 255 256 int64_t getValue() const { return Value; } 257 258 unsigned getValueSize() const { return ValueSize; } 259 260 unsigned getMaxBytesToEmit() const { return MaxBytesToEmit; } 261 262 bool hasEmitNops() const { return EmitNops; } 263 void setEmitNops(bool Value) { EmitNops = Value; } 264 265 bool hasOnlyAlignAddress() const { return OnlyAlignAddress; } 266 void setOnlyAlignAddress(bool Value) { OnlyAlignAddress = Value; } 267 268 /// @} 269 270 static bool classof(const MCFragment *F) { 271 return F->getKind() == MCFragment::FT_Align; 272 } 273 static bool classof(const MCAlignFragment *) { return true; } 274}; 275 276class MCFillFragment : public MCFragment { 277 /// Value - Value to use for filling bytes. 278 int64_t Value; 279 280 /// ValueSize - The size (in bytes) of \arg Value to use when filling, or 0 if 281 /// this is a virtual fill fragment. 282 unsigned ValueSize; 283 284 /// Size - The number of bytes to insert. 285 uint64_t Size; 286 287public: 288 MCFillFragment(int64_t _Value, unsigned _ValueSize, uint64_t _Size, 289 MCSectionData *SD = 0) 290 : MCFragment(FT_Fill, SD), 291 Value(_Value), ValueSize(_ValueSize), Size(_Size) { 292 assert((!ValueSize || (Size % ValueSize) == 0) && 293 "Fill size must be a multiple of the value size!"); 294 } 295 296 /// @name Accessors 297 /// @{ 298 299 int64_t getValue() const { return Value; } 300 301 unsigned getValueSize() const { return ValueSize; } 302 303 uint64_t getSize() const { return Size; } 304 305 /// @} 306 307 static bool classof(const MCFragment *F) { 308 return F->getKind() == MCFragment::FT_Fill; 309 } 310 static bool classof(const MCFillFragment *) { return true; } 311}; 312 313class MCOrgFragment : public MCFragment { 314 /// Offset - The offset this fragment should start at. 315 const MCExpr *Offset; 316 317 /// Value - Value to use for filling bytes. 318 int8_t Value; 319 320public: 321 MCOrgFragment(const MCExpr &_Offset, int8_t _Value, MCSectionData *SD = 0) 322 : MCFragment(FT_Org, SD), 323 Offset(&_Offset), Value(_Value) {} 324 325 /// @name Accessors 326 /// @{ 327 328 const MCExpr &getOffset() const { return *Offset; } 329 330 uint8_t getValue() const { return Value; } 331 332 /// @} 333 334 static bool classof(const MCFragment *F) { 335 return F->getKind() == MCFragment::FT_Org; 336 } 337 static bool classof(const MCOrgFragment *) { return true; } 338}; 339 340// FIXME: Should this be a separate class, or just merged into MCSection? Since 341// we anticipate the fast path being through an MCAssembler, the only reason to 342// keep it out is for API abstraction. 343class MCSectionData : public ilist_node<MCSectionData> { 344 friend class MCAsmLayout; 345 346 MCSectionData(const MCSectionData&); // DO NOT IMPLEMENT 347 void operator=(const MCSectionData&); // DO NOT IMPLEMENT 348 349public: 350 typedef iplist<MCFragment> FragmentListType; 351 352 typedef FragmentListType::const_iterator const_iterator; 353 typedef FragmentListType::iterator iterator; 354 355 typedef FragmentListType::const_reverse_iterator const_reverse_iterator; 356 typedef FragmentListType::reverse_iterator reverse_iterator; 357 358private: 359 FragmentListType Fragments; 360 const MCSection *Section; 361 362 /// Ordinal - The section index in the assemblers section list. 363 unsigned Ordinal; 364 365 /// LayoutOrder - The index of this section in the layout order. 366 unsigned LayoutOrder; 367 368 /// Alignment - The maximum alignment seen in this section. 369 unsigned Alignment; 370 371 /// @name Assembler Backend Data 372 /// @{ 373 // 374 // FIXME: This could all be kept private to the assembler implementation. 375 376 /// Address - The computed address of this section. This is ~0 until 377 /// initialized. 378 uint64_t Address; 379 380 /// HasInstructions - Whether this section has had instructions emitted into 381 /// it. 382 unsigned HasInstructions : 1; 383 384 /// @} 385 386public: 387 // Only for use as sentinel. 388 MCSectionData(); 389 MCSectionData(const MCSection &Section, MCAssembler *A = 0); 390 391 const MCSection &getSection() const { return *Section; } 392 393 unsigned getAlignment() const { return Alignment; } 394 void setAlignment(unsigned Value) { Alignment = Value; } 395 396 bool hasInstructions() const { return HasInstructions; } 397 void setHasInstructions(bool Value) { HasInstructions = Value; } 398 399 unsigned getOrdinal() const { return Ordinal; } 400 void setOrdinal(unsigned Value) { Ordinal = Value; } 401 402 unsigned getLayoutOrder() const { return LayoutOrder; } 403 void setLayoutOrder(unsigned Value) { LayoutOrder = Value; } 404 405 /// @name Fragment Access 406 /// @{ 407 408 const FragmentListType &getFragmentList() const { return Fragments; } 409 FragmentListType &getFragmentList() { return Fragments; } 410 411 iterator begin() { return Fragments.begin(); } 412 const_iterator begin() const { return Fragments.begin(); } 413 414 iterator end() { return Fragments.end(); } 415 const_iterator end() const { return Fragments.end(); } 416 417 reverse_iterator rbegin() { return Fragments.rbegin(); } 418 const_reverse_iterator rbegin() const { return Fragments.rbegin(); } 419 420 reverse_iterator rend() { return Fragments.rend(); } 421 const_reverse_iterator rend() const { return Fragments.rend(); } 422 423 size_t size() const { return Fragments.size(); } 424 425 bool empty() const { return Fragments.empty(); } 426 427 void dump(); 428 429 /// @} 430}; 431 432// FIXME: Same concerns as with SectionData. 433class MCSymbolData : public ilist_node<MCSymbolData> { 434public: 435 const MCSymbol *Symbol; 436 437 /// Fragment - The fragment this symbol's value is relative to, if any. 438 MCFragment *Fragment; 439 440 /// Offset - The offset to apply to the fragment address to form this symbol's 441 /// value. 442 uint64_t Offset; 443 444 /// IsExternal - True if this symbol is visible outside this translation 445 /// unit. 446 unsigned IsExternal : 1; 447 448 /// IsPrivateExtern - True if this symbol is private extern. 449 unsigned IsPrivateExtern : 1; 450 451 /// CommonSize - The size of the symbol, if it is 'common', or 0. 452 // 453 // FIXME: Pack this in with other fields? We could put it in offset, since a 454 // common symbol can never get a definition. 455 uint64_t CommonSize; 456 457 /// SymbolSize - An expression describing how to calculate the size of 458 /// a symbol. If a symbol has no size this field will be NULL. 459 const MCExpr *SymbolSize; 460 461 /// CommonAlign - The alignment of the symbol, if it is 'common'. 462 // 463 // FIXME: Pack this in with other fields? 464 unsigned CommonAlign; 465 466 /// Flags - The Flags field is used by object file implementations to store 467 /// additional per symbol information which is not easily classified. 468 uint32_t Flags; 469 470 /// Index - Index field, for use by the object file implementation. 471 uint64_t Index; 472 473public: 474 // Only for use as sentinel. 475 MCSymbolData(); 476 MCSymbolData(const MCSymbol &_Symbol, MCFragment *_Fragment, uint64_t _Offset, 477 MCAssembler *A = 0); 478 479 /// @name Accessors 480 /// @{ 481 482 const MCSymbol &getSymbol() const { return *Symbol; } 483 484 MCFragment *getFragment() const { return Fragment; } 485 void setFragment(MCFragment *Value) { Fragment = Value; } 486 487 uint64_t getOffset() const { return Offset; } 488 void setOffset(uint64_t Value) { Offset = Value; } 489 490 /// @} 491 /// @name Symbol Attributes 492 /// @{ 493 494 bool isExternal() const { return IsExternal; } 495 void setExternal(bool Value) { IsExternal = Value; } 496 497 bool isPrivateExtern() const { return IsPrivateExtern; } 498 void setPrivateExtern(bool Value) { IsPrivateExtern = Value; } 499 500 /// isCommon - Is this a 'common' symbol. 501 bool isCommon() const { return CommonSize != 0; } 502 503 /// setCommon - Mark this symbol as being 'common'. 504 /// 505 /// \param Size - The size of the symbol. 506 /// \param Align - The alignment of the symbol. 507 void setCommon(uint64_t Size, unsigned Align) { 508 CommonSize = Size; 509 CommonAlign = Align; 510 } 511 512 /// getCommonSize - Return the size of a 'common' symbol. 513 uint64_t getCommonSize() const { 514 assert(isCommon() && "Not a 'common' symbol!"); 515 return CommonSize; 516 } 517 518 void setSize(const MCExpr *SS) { 519 SymbolSize = SS; 520 } 521 522 const MCExpr *getSize() const { 523 return SymbolSize; 524 } 525 526 527 /// getCommonAlignment - Return the alignment of a 'common' symbol. 528 unsigned getCommonAlignment() const { 529 assert(isCommon() && "Not a 'common' symbol!"); 530 return CommonAlign; 531 } 532 533 /// getFlags - Get the (implementation defined) symbol flags. 534 uint32_t getFlags() const { return Flags; } 535 536 /// setFlags - Set the (implementation defined) symbol flags. 537 void setFlags(uint32_t Value) { Flags = Value; } 538 539 /// modifyFlags - Modify the flags via a mask 540 void modifyFlags(uint32_t Value, uint32_t Mask) { 541 Flags = (Flags & ~Mask) | Value; 542 } 543 544 /// getIndex - Get the (implementation defined) index. 545 uint64_t getIndex() const { return Index; } 546 547 /// setIndex - Set the (implementation defined) index. 548 void setIndex(uint64_t Value) { Index = Value; } 549 550 /// @} 551 552 void dump(); 553}; 554 555// FIXME: This really doesn't belong here. See comments below. 556struct IndirectSymbolData { 557 MCSymbol *Symbol; 558 MCSectionData *SectionData; 559}; 560 561class MCAssembler { 562 friend class MCAsmLayout; 563 564public: 565 typedef iplist<MCSectionData> SectionDataListType; 566 typedef iplist<MCSymbolData> SymbolDataListType; 567 568 typedef SectionDataListType::const_iterator const_iterator; 569 typedef SectionDataListType::iterator iterator; 570 571 typedef SymbolDataListType::const_iterator const_symbol_iterator; 572 typedef SymbolDataListType::iterator symbol_iterator; 573 574 typedef std::vector<IndirectSymbolData>::const_iterator 575 const_indirect_symbol_iterator; 576 typedef std::vector<IndirectSymbolData>::iterator indirect_symbol_iterator; 577 578private: 579 MCAssembler(const MCAssembler&); // DO NOT IMPLEMENT 580 void operator=(const MCAssembler&); // DO NOT IMPLEMENT 581 582 MCContext &Context; 583 584 TargetAsmBackend &Backend; 585 586 MCCodeEmitter &Emitter; 587 588 raw_ostream &OS; 589 590 iplist<MCSectionData> Sections; 591 592 iplist<MCSymbolData> Symbols; 593 594 /// The map of sections to their associated assembler backend data. 595 // 596 // FIXME: Avoid this indirection? 597 DenseMap<const MCSection*, MCSectionData*> SectionMap; 598 599 /// The map of symbols to their associated assembler backend data. 600 // 601 // FIXME: Avoid this indirection? 602 DenseMap<const MCSymbol*, MCSymbolData*> SymbolMap; 603 604 std::vector<IndirectSymbolData> IndirectSymbols; 605 606 unsigned RelaxAll : 1; 607 unsigned SubsectionsViaSymbols : 1; 608 609private: 610 /// Evaluate a fixup to a relocatable expression and the value which should be 611 /// placed into the fixup. 612 /// 613 /// \param Layout The layout to use for evaluation. 614 /// \param Fixup The fixup to evaluate. 615 /// \param DF The fragment the fixup is inside. 616 /// \param Target [out] On return, the relocatable expression the fixup 617 /// evaluates to. 618 /// \param Value [out] On return, the value of the fixup as currently layed 619 /// out. 620 /// \return Whether the fixup value was fully resolved. This is true if the 621 /// \arg Value result is fixed, otherwise the value may change due to 622 /// relocation. 623 bool EvaluateFixup(const MCAsmLayout &Layout, 624 const MCFixup &Fixup, const MCFragment *DF, 625 MCValue &Target, uint64_t &Value) const; 626 627 /// Check whether a fixup can be satisfied, or whether it needs to be relaxed 628 /// (increased in size, in order to hold its value correctly). 629 bool FixupNeedsRelaxation(const MCFixup &Fixup, const MCFragment *DF, 630 const MCAsmLayout &Layout) const; 631 632 /// Check whether the given fragment needs relaxation. 633 bool FragmentNeedsRelaxation(const MCInstFragment *IF, 634 const MCAsmLayout &Layout) const; 635 636 /// Compute the effective fragment size assuming it is layed out at the given 637 /// \arg SectionAddress and \arg FragmentOffset. 638 uint64_t ComputeFragmentSize(MCAsmLayout &Layout, const MCFragment &F, 639 uint64_t SectionAddress, 640 uint64_t FragmentOffset) const; 641 642 /// LayoutOnce - Perform one layout iteration and return true if any offsets 643 /// were adjusted. 644 bool LayoutOnce(MCAsmLayout &Layout); 645 646 /// FinishLayout - Finalize a layout, including fragment lowering. 647 void FinishLayout(MCAsmLayout &Layout); 648 649public: 650 /// Find the symbol which defines the atom containing the given symbol, or 651 /// null if there is no such symbol. 652 const MCSymbolData *getAtom(const MCAsmLayout &Layout, 653 const MCSymbolData *Symbol) const; 654 655 /// Check whether a particular symbol is visible to the linker and is required 656 /// in the symbol table, or whether it can be discarded by the assembler. This 657 /// also effects whether the assembler treats the label as potentially 658 /// defining a separate atom. 659 bool isSymbolLinkerVisible(const MCSymbol &SD) const; 660 661 /// Emit the section contents using the given object writer. 662 // 663 // FIXME: Should MCAssembler always have a reference to the object writer? 664 void WriteSectionData(const MCSectionData *Section, const MCAsmLayout &Layout, 665 MCObjectWriter *OW) const; 666 667 void AddSectionToTheEnd(MCSectionData &SD, MCAsmLayout &Layout); 668 669public: 670 /// Construct a new assembler instance. 671 /// 672 /// \arg OS - The stream to output to. 673 // 674 // FIXME: How are we going to parameterize this? Two obvious options are stay 675 // concrete and require clients to pass in a target like object. The other 676 // option is to make this abstract, and have targets provide concrete 677 // implementations as we do with AsmParser. 678 MCAssembler(MCContext &_Context, TargetAsmBackend &_Backend, 679 MCCodeEmitter &_Emitter, raw_ostream &OS); 680 ~MCAssembler(); 681 682 MCContext &getContext() const { return Context; } 683 684 TargetAsmBackend &getBackend() const { return Backend; } 685 686 MCCodeEmitter &getEmitter() const { return Emitter; } 687 688 /// Finish - Do final processing and write the object to the output stream. 689 /// \arg Writer is used for custom object writer (as the MCJIT does), 690 /// if not specified it is automatically created from backend. 691 void Finish(MCObjectWriter *Writer = 0); 692 693 // FIXME: This does not belong here. 694 bool getSubsectionsViaSymbols() const { 695 return SubsectionsViaSymbols; 696 } 697 void setSubsectionsViaSymbols(bool Value) { 698 SubsectionsViaSymbols = Value; 699 } 700 701 bool getRelaxAll() const { return RelaxAll; } 702 void setRelaxAll(bool Value) { RelaxAll = Value; } 703 704 /// @name Section List Access 705 /// @{ 706 707 const SectionDataListType &getSectionList() const { return Sections; } 708 SectionDataListType &getSectionList() { return Sections; } 709 710 iterator begin() { return Sections.begin(); } 711 const_iterator begin() const { return Sections.begin(); } 712 713 iterator end() { return Sections.end(); } 714 const_iterator end() const { return Sections.end(); } 715 716 size_t size() const { return Sections.size(); } 717 718 /// @} 719 /// @name Symbol List Access 720 /// @{ 721 722 const SymbolDataListType &getSymbolList() const { return Symbols; } 723 SymbolDataListType &getSymbolList() { return Symbols; } 724 725 symbol_iterator symbol_begin() { return Symbols.begin(); } 726 const_symbol_iterator symbol_begin() const { return Symbols.begin(); } 727 728 symbol_iterator symbol_end() { return Symbols.end(); } 729 const_symbol_iterator symbol_end() const { return Symbols.end(); } 730 731 size_t symbol_size() const { return Symbols.size(); } 732 733 /// @} 734 /// @name Indirect Symbol List Access 735 /// @{ 736 737 // FIXME: This is a total hack, this should not be here. Once things are 738 // factored so that the streamer has direct access to the .o writer, it can 739 // disappear. 740 std::vector<IndirectSymbolData> &getIndirectSymbols() { 741 return IndirectSymbols; 742 } 743 744 indirect_symbol_iterator indirect_symbol_begin() { 745 return IndirectSymbols.begin(); 746 } 747 const_indirect_symbol_iterator indirect_symbol_begin() const { 748 return IndirectSymbols.begin(); 749 } 750 751 indirect_symbol_iterator indirect_symbol_end() { 752 return IndirectSymbols.end(); 753 } 754 const_indirect_symbol_iterator indirect_symbol_end() const { 755 return IndirectSymbols.end(); 756 } 757 758 size_t indirect_symbol_size() const { return IndirectSymbols.size(); } 759 760 /// @} 761 /// @name Backend Data Access 762 /// @{ 763 764 MCSectionData &getSectionData(const MCSection &Section) const { 765 MCSectionData *Entry = SectionMap.lookup(&Section); 766 assert(Entry && "Missing section data!"); 767 return *Entry; 768 } 769 770 MCSectionData &getOrCreateSectionData(const MCSection &Section, 771 bool *Created = 0) { 772 MCSectionData *&Entry = SectionMap[&Section]; 773 774 if (Created) *Created = !Entry; 775 if (!Entry) 776 Entry = new MCSectionData(Section, this); 777 778 return *Entry; 779 } 780 781 MCSymbolData &getSymbolData(const MCSymbol &Symbol) const { 782 MCSymbolData *Entry = SymbolMap.lookup(&Symbol); 783 assert(Entry && "Missing symbol data!"); 784 return *Entry; 785 } 786 787 MCSymbolData &getOrCreateSymbolData(const MCSymbol &Symbol, 788 bool *Created = 0) { 789 MCSymbolData *&Entry = SymbolMap[&Symbol]; 790 791 if (Created) *Created = !Entry; 792 if (!Entry) 793 Entry = new MCSymbolData(Symbol, 0, 0, this); 794 795 return *Entry; 796 } 797 798 /// @} 799 800 void dump(); 801}; 802 803} // end namespace llvm 804 805#endif 806