include/llvm/Object/COFF.h

   1 //===- COFF.h - COFF object file implementation -----------------*- 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 // This file declares the COFFObjectFile class.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #ifndef LLVM_OBJECT_COFF_H
  15 #define LLVM_OBJECT_COFF_H
  16
  17 #include "llvm/ADT/PointerUnion.h"
  18 #include "llvm/Object/ObjectFile.h"
  19 #include "llvm/Support/COFF.h"
  20 #include "llvm/Support/Endian.h"
  21 #include "llvm/Support/ErrorOr.h"
  22
  23 namespace llvm {
  24 template <typename T> class ArrayRef;
  25
  26 namespace object {
  27 class ImportDirectoryEntryRef;
  28 class DelayImportDirectoryEntryRef;
  29 class ExportDirectoryEntryRef;
  30 class ImportedSymbolRef;
  31 class BaseRelocRef;
  32 typedef content_iterator<ImportDirectoryEntryRef> import_directory_iterator;
  33 typedef content_iterator<DelayImportDirectoryEntryRef>
  34     delay_import_directory_iterator;
  35 typedef content_iterator<ExportDirectoryEntryRef> export_directory_iterator;
  36 typedef content_iterator<ImportedSymbolRef> imported_symbol_iterator;
  37 typedef content_iterator<BaseRelocRef> base_reloc_iterator;
  38
  39 /// The DOS compatible header at the front of all PE/COFF executables.
  40 struct dos_header {
  41   char                 Magic[2];
  42   support::ulittle16_t UsedBytesInTheLastPage;
  43   support::ulittle16_t FileSizeInPages;
  44   support::ulittle16_t NumberOfRelocationItems;
  45   support::ulittle16_t HeaderSizeInParagraphs;
  46   support::ulittle16_t MinimumExtraParagraphs;
  47   support::ulittle16_t MaximumExtraParagraphs;
  48   support::ulittle16_t InitialRelativeSS;
  49   support::ulittle16_t InitialSP;
  50   support::ulittle16_t Checksum;
  51   support::ulittle16_t InitialIP;
  52   support::ulittle16_t InitialRelativeCS;
  53   support::ulittle16_t AddressOfRelocationTable;
  54   support::ulittle16_t OverlayNumber;
  55   support::ulittle16_t Reserved[4];
  56   support::ulittle16_t OEMid;
  57   support::ulittle16_t OEMinfo;
  58   support::ulittle16_t Reserved2[10];
  59   support::ulittle32_t AddressOfNewExeHeader;
  60 };
  61
  62 struct coff_file_header {
  63   support::ulittle16_t Machine;
  64   support::ulittle16_t NumberOfSections;
  65   support::ulittle32_t TimeDateStamp;
  66   support::ulittle32_t PointerToSymbolTable;
  67   support::ulittle32_t NumberOfSymbols;
  68   support::ulittle16_t SizeOfOptionalHeader;
  69   support::ulittle16_t Characteristics;
  70
  71   bool isImportLibrary() const { return NumberOfSections == 0xffff; }
  72 };
  73
  74 struct coff_bigobj_file_header {
  75   support::ulittle16_t Sig1;
  76   support::ulittle16_t Sig2;
  77   support::ulittle16_t Version;
  78   support::ulittle16_t Machine;
  79   support::ulittle32_t TimeDateStamp;
  80   uint8_t              UUID[16];
  81   support::ulittle32_t unused1;
  82   support::ulittle32_t unused2;
  83   support::ulittle32_t unused3;
  84   support::ulittle32_t unused4;
  85   support::ulittle32_t NumberOfSections;
  86   support::ulittle32_t PointerToSymbolTable;
  87   support::ulittle32_t NumberOfSymbols;
  88 };
  89
  90 /// The 32-bit PE header that follows the COFF header.
  91 struct pe32_header {
  92   support::ulittle16_t Magic;
  93   uint8_t MajorLinkerVersion;
  94   uint8_t MinorLinkerVersion;
  95   support::ulittle32_t SizeOfCode;
  96   support::ulittle32_t SizeOfInitializedData;
  97   support::ulittle32_t SizeOfUninitializedData;
  98   support::ulittle32_t AddressOfEntryPoint;
  99   support::ulittle32_t BaseOfCode;
 100   support::ulittle32_t BaseOfData;
 101   support::ulittle32_t ImageBase;
 102   support::ulittle32_t SectionAlignment;
 103   support::ulittle32_t FileAlignment;
 104   support::ulittle16_t MajorOperatingSystemVersion;
 105   support::ulittle16_t MinorOperatingSystemVersion;
 106   support::ulittle16_t MajorImageVersion;
 107   support::ulittle16_t MinorImageVersion;
 108   support::ulittle16_t MajorSubsystemVersion;
 109   support::ulittle16_t MinorSubsystemVersion;
 110   support::ulittle32_t Win32VersionValue;
 111   support::ulittle32_t SizeOfImage;
 112   support::ulittle32_t SizeOfHeaders;
 113   support::ulittle32_t CheckSum;
 114   support::ulittle16_t Subsystem;
 115   // FIXME: This should be DllCharacteristics.
 116   support::ulittle16_t DLLCharacteristics;
 117   support::ulittle32_t SizeOfStackReserve;
 118   support::ulittle32_t SizeOfStackCommit;
 119   support::ulittle32_t SizeOfHeapReserve;
 120   support::ulittle32_t SizeOfHeapCommit;
 121   support::ulittle32_t LoaderFlags;
 122   // FIXME: This should be NumberOfRvaAndSizes.
 123   support::ulittle32_t NumberOfRvaAndSize;
 124 };
 125
 126 /// The 64-bit PE header that follows the COFF header.
 127 struct pe32plus_header {
 128   support::ulittle16_t Magic;
 129   uint8_t MajorLinkerVersion;
 130   uint8_t MinorLinkerVersion;
 131   support::ulittle32_t SizeOfCode;
 132   support::ulittle32_t SizeOfInitializedData;
 133   support::ulittle32_t SizeOfUninitializedData;
 134   support::ulittle32_t AddressOfEntryPoint;
 135   support::ulittle32_t BaseOfCode;
 136   support::ulittle64_t ImageBase;
 137   support::ulittle32_t SectionAlignment;
 138   support::ulittle32_t FileAlignment;
 139   support::ulittle16_t MajorOperatingSystemVersion;
 140   support::ulittle16_t MinorOperatingSystemVersion;
 141   support::ulittle16_t MajorImageVersion;
 142   support::ulittle16_t MinorImageVersion;
 143   support::ulittle16_t MajorSubsystemVersion;
 144   support::ulittle16_t MinorSubsystemVersion;
 145   support::ulittle32_t Win32VersionValue;
 146   support::ulittle32_t SizeOfImage;
 147   support::ulittle32_t SizeOfHeaders;
 148   support::ulittle32_t CheckSum;
 149   support::ulittle16_t Subsystem;
 150   support::ulittle16_t DLLCharacteristics;
 151   support::ulittle64_t SizeOfStackReserve;
 152   support::ulittle64_t SizeOfStackCommit;
 153   support::ulittle64_t SizeOfHeapReserve;
 154   support::ulittle64_t SizeOfHeapCommit;
 155   support::ulittle32_t LoaderFlags;
 156   support::ulittle32_t NumberOfRvaAndSize;
 157 };
 158
 159 struct data_directory {
 160   support::ulittle32_t RelativeVirtualAddress;
 161   support::ulittle32_t Size;
 162 };
 163
 164 struct import_directory_table_entry {
 165   support::ulittle32_t ImportLookupTableRVA;
 166   support::ulittle32_t TimeDateStamp;
 167   support::ulittle32_t ForwarderChain;
 168   support::ulittle32_t NameRVA;
 169   support::ulittle32_t ImportAddressTableRVA;
 170 };
 171
 172 struct debug_directory {
 173   support::ulittle32_t Characteristics;
 174   support::ulittle32_t TimeDateStamp;
 175   support::ulittle16_t MajorVersion;
 176   support::ulittle16_t MinorVersion;
 177   support::ulittle32_t Type;
 178   support::ulittle32_t SizeOfData;
 179   support::ulittle32_t AddressOfRawData;
 180   support::ulittle32_t PointerToRawData;
 181 };
 182
 183 /// Information that is resent in debug_directory::AddressOfRawData if Type is
 184 /// IMAGE_DEBUG_TYPE_CODEVIEW.
 185 struct debug_pdb_info {
 186   support::ulittle32_t Signature;
 187   uint8_t Guid[16];
 188   support::ulittle32_t Age;
 189   // PDBFileName: The null-terminated PDB file name follows.
 190 };
 191
 192 template <typename IntTy>
 193 struct import_lookup_table_entry {
 194   IntTy Data;
 195
 196   bool isOrdinal() const { return Data < 0; }
 197
 198   uint16_t getOrdinal() const {
 199     assert(isOrdinal() && "ILT entry is not an ordinal!");
 200     return Data & 0xFFFF;
 201   }
 202
 203   uint32_t getHintNameRVA() const {
 204     assert(!isOrdinal() && "ILT entry is not a Hint/Name RVA!");
 205     return Data & 0xFFFFFFFF;
 206   }
 207 };
 208
 209 typedef import_lookup_table_entry<support::little32_t>
 210     import_lookup_table_entry32;
 211 typedef import_lookup_table_entry<support::little64_t>
 212     import_lookup_table_entry64;
 213
 214 struct delay_import_directory_table_entry {
 215   // dumpbin reports this field as "Characteristics" instead of "Attributes".
 216   support::ulittle32_t Attributes;
 217   support::ulittle32_t Name;
 218   support::ulittle32_t ModuleHandle;
 219   support::ulittle32_t DelayImportAddressTable;
 220   support::ulittle32_t DelayImportNameTable;
 221   support::ulittle32_t BoundDelayImportTable;
 222   support::ulittle32_t UnloadDelayImportTable;
 223   support::ulittle32_t TimeStamp;
 224 };
 225
 226 struct export_directory_table_entry {
 227   support::ulittle32_t ExportFlags;
 228   support::ulittle32_t TimeDateStamp;
 229   support::ulittle16_t MajorVersion;
 230   support::ulittle16_t MinorVersion;
 231   support::ulittle32_t NameRVA;
 232   support::ulittle32_t OrdinalBase;
 233   support::ulittle32_t AddressTableEntries;
 234   support::ulittle32_t NumberOfNamePointers;
 235   support::ulittle32_t ExportAddressTableRVA;
 236   support::ulittle32_t NamePointerRVA;
 237   support::ulittle32_t OrdinalTableRVA;
 238 };
 239
 240 union export_address_table_entry {
 241   support::ulittle32_t ExportRVA;
 242   support::ulittle32_t ForwarderRVA;
 243 };
 244
 245 typedef support::ulittle32_t export_name_pointer_table_entry;
 246 typedef support::ulittle16_t export_ordinal_table_entry;
 247
 248 struct StringTableOffset {
 249   support::ulittle32_t Zeroes;
 250   support::ulittle32_t Offset;
 251 };
 252
 253 template <typename SectionNumberType>
 254 struct coff_symbol {
 255   union {
 256     char ShortName[COFF::NameSize];
 257     StringTableOffset Offset;
 258   } Name;
 259
 260   support::ulittle32_t Value;
 261   SectionNumberType SectionNumber;
 262
 263   support::ulittle16_t Type;
 264
 265   uint8_t StorageClass;
 266   uint8_t NumberOfAuxSymbols;
 267 };
 268
 269 typedef coff_symbol<support::ulittle16_t> coff_symbol16;
 270 typedef coff_symbol<support::ulittle32_t> coff_symbol32;
 271
 272 // Contains only common parts of coff_symbol16 and coff_symbol32.
 273 struct coff_symbol_generic {
 274   union {
 275     char ShortName[COFF::NameSize];
 276     StringTableOffset Offset;
 277   } Name;
 278   support::ulittle32_t Value;
 279 };
 280
 281 class COFFSymbolRef {
 282 public:
 283   COFFSymbolRef(const coff_symbol16 *CS) : CS16(CS), CS32(nullptr) {}
 284   COFFSymbolRef(const coff_symbol32 *CS) : CS16(nullptr), CS32(CS) {}
 285   COFFSymbolRef() : CS16(nullptr), CS32(nullptr) {}
 286
 287   const void *getRawPtr() const {
 288     return CS16 ? static_cast<const void *>(CS16) : CS32;
 289   }
 290
 291   const coff_symbol_generic *getGeneric() const {
 292     if (CS16)
 293       return reinterpret_cast<const coff_symbol_generic *>(CS16);
 294     return reinterpret_cast<const coff_symbol_generic *>(CS32);
 295   }
 296
 297   friend bool operator<(COFFSymbolRef A, COFFSymbolRef B) {
 298     return A.getRawPtr() < B.getRawPtr();
 299   }
 300
 301   bool isBigObj() const {
 302     if (CS16)
 303       return false;
 304     if (CS32)
 305       return true;
 306     llvm_unreachable("COFFSymbolRef points to nothing!");
 307   }
 308
 309   const char *getShortName() const {
 310     return CS16 ? CS16->Name.ShortName : CS32->Name.ShortName;
 311   }
 312
 313   const StringTableOffset &getStringTableOffset() const {
 314     assert(isSet() && "COFFSymbolRef points to nothing!");
 315     return CS16 ? CS16->Name.Offset : CS32->Name.Offset;
 316   }
 317
 318   uint32_t getValue() const { return CS16 ? CS16->Value : CS32->Value; }
 319
 320   int32_t getSectionNumber() const {
 321     assert(isSet() && "COFFSymbolRef points to nothing!");
 322     if (CS16) {
 323       // Reserved sections are returned as negative numbers.
 324       if (CS16->SectionNumber <= COFF::MaxNumberOfSections16)
 325         return CS16->SectionNumber;
 326       return static_cast<int16_t>(CS16->SectionNumber);
 327     }
 328     return static_cast<int32_t>(CS32->SectionNumber);
 329   }
 330
 331   uint16_t getType() const {
 332     assert(isSet() && "COFFSymbolRef points to nothing!");
 333     return CS16 ? CS16->Type : CS32->Type;
 334   }
 335
 336   uint8_t getStorageClass() const {
 337     assert(isSet() && "COFFSymbolRef points to nothing!");
 338     return CS16 ? CS16->StorageClass : CS32->StorageClass;
 339   }
 340
 341   uint8_t getNumberOfAuxSymbols() const {
 342     assert(isSet() && "COFFSymbolRef points to nothing!");
 343     return CS16 ? CS16->NumberOfAuxSymbols : CS32->NumberOfAuxSymbols;
 344   }
 345
 346   uint8_t getBaseType() const { return getType() & 0x0F; }
 347
 348   uint8_t getComplexType() const {
 349     return (getType() & 0xF0) >> COFF::SCT_COMPLEX_TYPE_SHIFT;
 350   }
 351
 352   bool isAbsolute() const {
 353     return getSectionNumber() == -1;
 354   }
 355
 356   bool isExternal() const {
 357     return getStorageClass() == COFF::IMAGE_SYM_CLASS_EXTERNAL;
 358   }
 359
 360   bool isCommon() const {
 361     return isExternal() && getSectionNumber() == COFF::IMAGE_SYM_UNDEFINED &&
 362            getValue() != 0;
 363   }
 364
 365   bool isUndefined() const {
 366     return isExternal() && getSectionNumber() == COFF::IMAGE_SYM_UNDEFINED &&
 367            getValue() == 0;
 368   }
 369
 370   bool isWeakExternal() const {
 371     return getStorageClass() == COFF::IMAGE_SYM_CLASS_WEAK_EXTERNAL;
 372   }
 373
 374   bool isFunctionDefinition() const {
 375     return isExternal() && getBaseType() == COFF::IMAGE_SYM_TYPE_NULL &&
 376            getComplexType() == COFF::IMAGE_SYM_DTYPE_FUNCTION &&
 377            !COFF::isReservedSectionNumber(getSectionNumber());
 378   }
 379
 380   bool isFunctionLineInfo() const {
 381     return getStorageClass() == COFF::IMAGE_SYM_CLASS_FUNCTION;
 382   }
 383
 384   bool isAnyUndefined() const {
 385     return isUndefined() || isWeakExternal();
 386   }
 387
 388   bool isFileRecord() const {
 389     return getStorageClass() == COFF::IMAGE_SYM_CLASS_FILE;
 390   }
 391
 392   bool isSection() const {
 393     return getStorageClass() == COFF::IMAGE_SYM_CLASS_SECTION;
 394   }
 395
 396   bool isSectionDefinition() const {
 397     // C++/CLI creates external ABS symbols for non-const appdomain globals.
 398     // These are also followed by an auxiliary section definition.
 399     bool isAppdomainGlobal =
 400         getStorageClass() == COFF::IMAGE_SYM_CLASS_EXTERNAL &&
 401         getSectionNumber() == COFF::IMAGE_SYM_ABSOLUTE;
 402     bool isOrdinarySection = getStorageClass() == COFF::IMAGE_SYM_CLASS_STATIC;
 403     if (!getNumberOfAuxSymbols())
 404       return false;
 405     return isAppdomainGlobal || isOrdinarySection;
 406   }
 407
 408   bool isCLRToken() const {
 409     return getStorageClass() == COFF::IMAGE_SYM_CLASS_CLR_TOKEN;
 410   }
 411
 412 private:
 413   bool isSet() const { return CS16 || CS32; }
 414
 415   const coff_symbol16 *CS16;
 416   const coff_symbol32 *CS32;
 417 };
 418
 419 struct coff_section {
 420   char Name[COFF::NameSize];
 421   support::ulittle32_t VirtualSize;
 422   support::ulittle32_t VirtualAddress;
 423   support::ulittle32_t SizeOfRawData;
 424   support::ulittle32_t PointerToRawData;
 425   support::ulittle32_t PointerToRelocations;
 426   support::ulittle32_t PointerToLinenumbers;
 427   support::ulittle16_t NumberOfRelocations;
 428   support::ulittle16_t NumberOfLinenumbers;
 429   support::ulittle32_t Characteristics;
 430
 431   // Returns true if the actual number of relocations is stored in
 432   // VirtualAddress field of the first relocation table entry.
 433   bool hasExtendedRelocations() const {
 434     return (Characteristics & COFF::IMAGE_SCN_LNK_NRELOC_OVFL) &&
 435            NumberOfRelocations == UINT16_MAX;
 436   }
 437   uint32_t getAlignment() const {
 438     // The IMAGE_SCN_TYPE_NO_PAD bit is a legacy way of getting to
 439     // IMAGE_SCN_ALIGN_1BYTES.
 440     if (Characteristics & COFF::IMAGE_SCN_TYPE_NO_PAD)
 441       return 1;
 442
 443     // Bit [20:24] contains section alignment. Both 0 and 1 mean alignment 1.
 444     uint32_t Shift = (Characteristics >> 20) & 0xF;
 445     if (Shift > 0)
 446       return 1U << (Shift - 1);
 447     return 1;
 448   }
 449 };
 450
 451 struct coff_relocation {
 452   support::ulittle32_t VirtualAddress;
 453   support::ulittle32_t SymbolTableIndex;
 454   support::ulittle16_t Type;
 455 };
 456
 457 struct coff_aux_function_definition {
 458   support::ulittle32_t TagIndex;
 459   support::ulittle32_t TotalSize;
 460   support::ulittle32_t PointerToLinenumber;
 461   support::ulittle32_t PointerToNextFunction;
 462   char Unused1[2];
 463 };
 464
 465 static_assert(sizeof(coff_aux_function_definition) == 18,
 466               "auxiliary entry must be 18 bytes");
 467
 468 struct coff_aux_bf_and_ef_symbol {
 469   char Unused1[4];
 470   support::ulittle16_t Linenumber;
 471   char Unused2[6];
 472   support::ulittle32_t PointerToNextFunction;
 473   char Unused3[2];
 474 };
 475
 476 static_assert(sizeof(coff_aux_bf_and_ef_symbol) == 18,
 477               "auxiliary entry must be 18 bytes");
 478
 479 struct coff_aux_weak_external {
 480   support::ulittle32_t TagIndex;
 481   support::ulittle32_t Characteristics;
 482   char Unused1[10];
 483 };
 484
 485 static_assert(sizeof(coff_aux_weak_external) == 18,
 486               "auxiliary entry must be 18 bytes");
 487
 488 struct coff_aux_section_definition {
 489   support::ulittle32_t Length;
 490   support::ulittle16_t NumberOfRelocations;
 491   support::ulittle16_t NumberOfLinenumbers;
 492   support::ulittle32_t CheckSum;
 493   support::ulittle16_t NumberLowPart;
 494   uint8_t              Selection;
 495   uint8_t              Unused;
 496   support::ulittle16_t NumberHighPart;
 497   int32_t getNumber(bool IsBigObj) const {
 498     uint32_t Number = static_cast<uint32_t>(NumberLowPart);
 499     if (IsBigObj)
 500       Number |= static_cast<uint32_t>(NumberHighPart) << 16;
 501     return static_cast<int32_t>(Number);
 502   }
 503 };
 504
 505 static_assert(sizeof(coff_aux_section_definition) == 18,
 506               "auxiliary entry must be 18 bytes");
 507
 508 struct coff_aux_clr_token {
 509   uint8_t              AuxType;
 510   uint8_t              Reserved;
 511   support::ulittle32_t SymbolTableIndex;
 512   char                 MBZ[12];
 513 };
 514
 515 static_assert(sizeof(coff_aux_clr_token) == 18,
 516               "auxiliary entry must be 18 bytes");
 517
 518 struct coff_import_header {
 519   support::ulittle16_t Sig1;
 520   support::ulittle16_t Sig2;
 521   support::ulittle16_t Version;
 522   support::ulittle16_t Machine;
 523   support::ulittle32_t TimeDateStamp;
 524   support::ulittle32_t SizeOfData;
 525   support::ulittle16_t OrdinalHint;
 526   support::ulittle16_t TypeInfo;
 527   int getType() const { return TypeInfo & 0x3; }
 528   int getNameType() const { return (TypeInfo >> 2) & 0x7; }
 529 };
 530
 531 struct coff_import_directory_table_entry {
 532   support::ulittle32_t ImportLookupTableRVA;
 533   support::ulittle32_t TimeDateStamp;
 534   support::ulittle32_t ForwarderChain;
 535   support::ulittle32_t NameRVA;
 536   support::ulittle32_t ImportAddressTableRVA;
 537 };
 538
 539 template <typename IntTy>
 540 struct coff_tls_directory {
 541   IntTy StartAddressOfRawData;
 542   IntTy EndAddressOfRawData;
 543   IntTy AddressOfIndex;
 544   IntTy AddressOfCallBacks;
 545   support::ulittle32_t SizeOfZeroFill;
 546   support::ulittle32_t Characteristics;
 547   uint32_t getAlignment() const {
 548     // Bit [20:24] contains section alignment.
 549     uint32_t Shift = (Characteristics & 0x00F00000) >> 20;
 550     if (Shift > 0)
 551       return 1U << (Shift - 1);
 552     return 0;
 553   }
 554 };
 555
 556 typedef coff_tls_directory<support::little32_t> coff_tls_directory32;
 557 typedef coff_tls_directory<support::little64_t> coff_tls_directory64;
 558
 559 struct coff_load_configuration32 {
 560   support::ulittle32_t Characteristics;
 561   support::ulittle32_t TimeDateStamp;
 562   support::ulittle16_t MajorVersion;
 563   support::ulittle16_t MinorVersion;
 564   support::ulittle32_t GlobalFlagsClear;
 565   support::ulittle32_t GlobalFlagsSet;
 566   support::ulittle32_t CriticalSectionDefaultTimeout;
 567   support::ulittle32_t DeCommitFreeBlockThreshold;
 568   support::ulittle32_t DeCommitTotalFreeThreshold;
 569   support::ulittle32_t LockPrefixTable;
 570   support::ulittle32_t MaximumAllocationSize;
 571   support::ulittle32_t VirtualMemoryThreshold;
 572   support::ulittle32_t ProcessAffinityMask;
 573   support::ulittle32_t ProcessHeapFlags;
 574   support::ulittle16_t CSDVersion;
 575   support::ulittle16_t Reserved;
 576   support::ulittle32_t EditList;
 577   support::ulittle32_t SecurityCookie;
 578   support::ulittle32_t SEHandlerTable;
 579   support::ulittle32_t SEHandlerCount;
 580 };
 581
 582 struct coff_load_configuration64 {
 583   support::ulittle32_t Characteristics;
 584   support::ulittle32_t TimeDateStamp;
 585   support::ulittle16_t MajorVersion;
 586   support::ulittle16_t MinorVersion;
 587   support::ulittle32_t GlobalFlagsClear;
 588   support::ulittle32_t GlobalFlagsSet;
 589   support::ulittle32_t CriticalSectionDefaultTimeout;
 590   support::ulittle32_t DeCommitFreeBlockThreshold;
 591   support::ulittle32_t DeCommitTotalFreeThreshold;
 592   support::ulittle32_t LockPrefixTable;
 593   support::ulittle32_t MaximumAllocationSize;
 594   support::ulittle32_t VirtualMemoryThreshold;
 595   support::ulittle32_t ProcessAffinityMask;
 596   support::ulittle32_t ProcessHeapFlags;
 597   support::ulittle16_t CSDVersion;
 598   support::ulittle16_t Reserved;
 599   support::ulittle32_t EditList;
 600   support::ulittle64_t SecurityCookie;
 601   support::ulittle64_t SEHandlerTable;
 602   support::ulittle64_t SEHandlerCount;
 603 };
 604
 605 struct coff_runtime_function_x64 {
 606   support::ulittle32_t BeginAddress;
 607   support::ulittle32_t EndAddress;
 608   support::ulittle32_t UnwindInformation;
 609 };
 610
 611 struct coff_base_reloc_block_header {
 612   support::ulittle32_t PageRVA;
 613   support::ulittle32_t BlockSize;
 614 };
 615
 616 struct coff_base_reloc_block_entry {
 617   support::ulittle16_t Data;
 618   int getType() const { return Data >> 12; }
 619   int getOffset() const { return Data & ((1 << 12) - 1); }
 620 };
 621
 622 class COFFObjectFile : public ObjectFile {
 623 private:
 624   friend class ImportDirectoryEntryRef;
 625   friend class ExportDirectoryEntryRef;
 626   const coff_file_header *COFFHeader;
 627   const coff_bigobj_file_header *COFFBigObjHeader;
 628   const pe32_header *PE32Header;
 629   const pe32plus_header *PE32PlusHeader;
 630   const data_directory *DataDirectory;
 631   const coff_section *SectionTable;
 632   const coff_symbol16 *SymbolTable16;
 633   const coff_symbol32 *SymbolTable32;
 634   const char *StringTable;
 635   uint32_t StringTableSize;
 636   const import_directory_table_entry *ImportDirectory;
 637   uint32_t NumberOfImportDirectory;
 638   const delay_import_directory_table_entry *DelayImportDirectory;
 639   uint32_t NumberOfDelayImportDirectory;
 640   const export_directory_table_entry *ExportDirectory;
 641   const coff_base_reloc_block_header *BaseRelocHeader;
 642   const coff_base_reloc_block_header *BaseRelocEnd;
 643   const debug_directory *DebugDirectoryBegin;
 644   const debug_directory *DebugDirectoryEnd;
 645
 646   std::error_code getString(uint32_t offset, StringRef &Res) const;
 647
 648   template <typename coff_symbol_type>
 649   const coff_symbol_type *toSymb(DataRefImpl Symb) const;
 650   const coff_section *toSec(DataRefImpl Sec) const;
 651   const coff_relocation *toRel(DataRefImpl Rel) const;
 652
 653   std::error_code initSymbolTablePtr();
 654   std::error_code initImportTablePtr();
 655   std::error_code initDelayImportTablePtr();
 656   std::error_code initExportTablePtr();
 657   std::error_code initBaseRelocPtr();
 658   std::error_code initDebugDirectoryPtr();
 659
 660 public:
 661   uintptr_t getSymbolTable() const {
 662     if (SymbolTable16)
 663       return reinterpret_cast<uintptr_t>(SymbolTable16);
 664     if (SymbolTable32)
 665       return reinterpret_cast<uintptr_t>(SymbolTable32);
 666     return uintptr_t(0);
 667   }
 668   uint16_t getMachine() const {
 669     if (COFFHeader)
 670       return COFFHeader->Machine;
 671     if (COFFBigObjHeader)
 672       return COFFBigObjHeader->Machine;
 673     llvm_unreachable("no COFF header!");
 674   }
 675   uint16_t getSizeOfOptionalHeader() const {
 676     if (COFFHeader)
 677       return COFFHeader->isImportLibrary() ? 0
 678                                            : COFFHeader->SizeOfOptionalHeader;
 679     // bigobj doesn't have this field.
 680     if (COFFBigObjHeader)
 681       return 0;
 682     llvm_unreachable("no COFF header!");
 683   }
 684   uint16_t getCharacteristics() const {
 685     if (COFFHeader)
 686       return COFFHeader->isImportLibrary() ? 0 : COFFHeader->Characteristics;
 687     // bigobj doesn't have characteristics to speak of,
 688     // editbin will silently lie to you if you attempt to set any.
 689     if (COFFBigObjHeader)
 690       return 0;
 691     llvm_unreachable("no COFF header!");
 692   }
 693   uint32_t getTimeDateStamp() const {
 694     if (COFFHeader)
 695       return COFFHeader->TimeDateStamp;
 696     if (COFFBigObjHeader)
 697       return COFFBigObjHeader->TimeDateStamp;
 698     llvm_unreachable("no COFF header!");
 699   }
 700   uint32_t getNumberOfSections() const {
 701     if (COFFHeader)
 702       return COFFHeader->isImportLibrary() ? 0 : COFFHeader->NumberOfSections;
 703     if (COFFBigObjHeader)
 704       return COFFBigObjHeader->NumberOfSections;
 705     llvm_unreachable("no COFF header!");
 706   }
 707   uint32_t getPointerToSymbolTable() const {
 708     if (COFFHeader)
 709       return COFFHeader->isImportLibrary() ? 0
 710                                            : COFFHeader->PointerToSymbolTable;
 711     if (COFFBigObjHeader)
 712       return COFFBigObjHeader->PointerToSymbolTable;
 713     llvm_unreachable("no COFF header!");
 714   }
 715   uint32_t getNumberOfSymbols() const {
 716     if (COFFHeader)
 717       return COFFHeader->isImportLibrary() ? 0 : COFFHeader->NumberOfSymbols;
 718     if (COFFBigObjHeader)
 719       return COFFBigObjHeader->NumberOfSymbols;
 720     llvm_unreachable("no COFF header!");
 721   }
 722 protected:
 723   void moveSymbolNext(DataRefImpl &Symb) const override;
 724   Expected<StringRef> getSymbolName(DataRefImpl Symb) const override;
 725   ErrorOr<uint64_t> getSymbolAddress(DataRefImpl Symb) const override;
 726   uint64_t getSymbolValueImpl(DataRefImpl Symb) const override;
 727   uint64_t getCommonSymbolSizeImpl(DataRefImpl Symb) const override;
 728   uint32_t getSymbolFlags(DataRefImpl Symb) const override;
 729   Expected<SymbolRef::Type> getSymbolType(DataRefImpl Symb) const override;
 730   Expected<section_iterator> getSymbolSection(DataRefImpl Symb) const override;
 731   void moveSectionNext(DataRefImpl &Sec) const override;
 732   std::error_code getSectionName(DataRefImpl Sec,
 733                                  StringRef &Res) const override;
 734   uint64_t getSectionAddress(DataRefImpl Sec) const override;
 735   uint64_t getSectionSize(DataRefImpl Sec) const override;
 736   std::error_code getSectionContents(DataRefImpl Sec,
 737                                      StringRef &Res) const override;
 738   uint64_t getSectionAlignment(DataRefImpl Sec) const override;
 739   bool isSectionCompressed(DataRefImpl Sec) const override;
 740   bool isSectionText(DataRefImpl Sec) const override;
 741   bool isSectionData(DataRefImpl Sec) const override;
 742   bool isSectionBSS(DataRefImpl Sec) const override;
 743   bool isSectionVirtual(DataRefImpl Sec) const override;
 744   relocation_iterator section_rel_begin(DataRefImpl Sec) const override;
 745   relocation_iterator section_rel_end(DataRefImpl Sec) const override;
 746
 747   void moveRelocationNext(DataRefImpl &Rel) const override;
 748   uint64_t getRelocationOffset(DataRefImpl Rel) const override;
 749   symbol_iterator getRelocationSymbol(DataRefImpl Rel) const override;
 750   uint64_t getRelocationType(DataRefImpl Rel) const override;
 751   void getRelocationTypeName(DataRefImpl Rel,
 752                              SmallVectorImpl<char> &Result) const override;
 753
 754 public:
 755   COFFObjectFile(MemoryBufferRef Object, std::error_code &EC);
 756   basic_symbol_iterator symbol_begin_impl() const override;
 757   basic_symbol_iterator symbol_end_impl() const override;
 758   section_iterator section_begin() const override;
 759   section_iterator section_end() const override;
 760
 761   const coff_section *getCOFFSection(const SectionRef &Section) const;
 762   COFFSymbolRef getCOFFSymbol(const DataRefImpl &Ref) const;
 763   COFFSymbolRef getCOFFSymbol(const SymbolRef &Symbol) const;
 764   const coff_relocation *getCOFFRelocation(const RelocationRef &Reloc) const;
 765   unsigned getSectionID(SectionRef Sec) const;
 766   unsigned getSymbolSectionID(SymbolRef Sym) const;
 767
 768   uint8_t getBytesInAddress() const override;
 769   StringRef getFileFormatName() const override;
 770   unsigned getArch() const override;
 771
 772   import_directory_iterator import_directory_begin() const;
 773   import_directory_iterator import_directory_end() const;
 774   delay_import_directory_iterator delay_import_directory_begin() const;
 775   delay_import_directory_iterator delay_import_directory_end() const;
 776   export_directory_iterator export_directory_begin() const;
 777   export_directory_iterator export_directory_end() const;
 778   base_reloc_iterator base_reloc_begin() const;
 779   base_reloc_iterator base_reloc_end() const;
 780   const debug_directory *debug_directory_begin() const {
 781     return DebugDirectoryBegin;
 782   }
 783   const debug_directory *debug_directory_end() const {
 784     return DebugDirectoryEnd;
 785   }
 786
 787   iterator_range<import_directory_iterator> import_directories() const;
 788   iterator_range<delay_import_directory_iterator>
 789       delay_import_directories() const;
 790   iterator_range<export_directory_iterator> export_directories() const;
 791   iterator_range<base_reloc_iterator> base_relocs() const;
 792   iterator_range<const debug_directory *> debug_directories() const {
 793     return make_range(debug_directory_begin(), debug_directory_end());
 794   }
 795
 796   const dos_header *getDOSHeader() const {
 797     if (!PE32Header && !PE32PlusHeader)
 798       return nullptr;
 799     return reinterpret_cast<const dos_header *>(base());
 800   }
 801   std::error_code getPE32Header(const pe32_header *&Res) const;
 802   std::error_code getPE32PlusHeader(const pe32plus_header *&Res) const;
 803   std::error_code getDataDirectory(uint32_t index,
 804                                    const data_directory *&Res) const;
 805   std::error_code getSection(int32_t index, const coff_section *&Res) const;
 806   template <typename coff_symbol_type>
 807   std::error_code getSymbol(uint32_t Index,
 808                             const coff_symbol_type *&Res) const {
 809     if (Index >= getNumberOfSymbols())
 810       return object_error::parse_failed;
 811
 812     Res = reinterpret_cast<coff_symbol_type *>(getSymbolTable()) + Index;
 813     return std::error_code();
 814   }
 815   ErrorOr<COFFSymbolRef> getSymbol(uint32_t index) const {
 816     if (SymbolTable16) {
 817       const coff_symbol16 *Symb = nullptr;
 818       if (std::error_code EC = getSymbol(index, Symb))
 819         return EC;
 820       return COFFSymbolRef(Symb);
 821     }
 822     if (SymbolTable32) {
 823       const coff_symbol32 *Symb = nullptr;
 824       if (std::error_code EC = getSymbol(index, Symb))
 825         return EC;
 826       return COFFSymbolRef(Symb);
 827     }
 828     return object_error::parse_failed;
 829   }
 830   template <typename T>
 831   std::error_code getAuxSymbol(uint32_t index, const T *&Res) const {
 832     ErrorOr<COFFSymbolRef> s = getSymbol(index);
 833     if (std::error_code EC = s.getError())
 834       return EC;
 835     Res = reinterpret_cast<const T *>(s->getRawPtr());
 836     return std::error_code();
 837   }
 838   std::error_code getSymbolName(COFFSymbolRef Symbol, StringRef &Res) const;
 839   std::error_code getSymbolName(const coff_symbol_generic *Symbol,
 840                                 StringRef &Res) const;
 841
 842   ArrayRef<uint8_t> getSymbolAuxData(COFFSymbolRef Symbol) const;
 843
 844   size_t getSymbolTableEntrySize() const {
 845     if (COFFHeader)
 846       return sizeof(coff_symbol16);
 847     if (COFFBigObjHeader)
 848       return sizeof(coff_symbol32);
 849     llvm_unreachable("null symbol table pointer!");
 850   }
 851
 852   iterator_range<const coff_relocation *>
 853   getRelocations(const coff_section *Sec) const;
 854
 855   std::error_code getSectionName(const coff_section *Sec, StringRef &Res) const;
 856   uint64_t getSectionSize(const coff_section *Sec) const;
 857   std::error_code getSectionContents(const coff_section *Sec,
 858                                      ArrayRef<uint8_t> &Res) const;
 859
 860   uint64_t getImageBase() const;
 861   std::error_code getVaPtr(uint64_t VA, uintptr_t &Res) const;
 862   std::error_code getRvaPtr(uint32_t Rva, uintptr_t &Res) const;
 863
 864   /// Given an RVA base and size, returns a valid array of bytes or an error
 865   /// code if the RVA and size is not contained completely within a valid
 866   /// section.
 867   std::error_code getRvaAndSizeAsBytes(uint32_t RVA, uint32_t Size,
 868                                        ArrayRef<uint8_t> &Contents) const;
 869
 870   std::error_code getHintName(uint32_t Rva, uint16_t &Hint,
 871                               StringRef &Name) const;
 872
 873   std::error_code getDebugPDBInfo(const debug_directory *DebugDir,
 874                                   const debug_pdb_info *&Info,
 875                                   StringRef &PDBFileName) const;
 876
 877   bool isRelocatableObject() const override;
 878   bool is64() const { return PE32PlusHeader; }
 879
 880   static inline bool classof(const Binary *v) { return v->isCOFF(); }
 881 };
 882
 883 // The iterator for the import directory table.
 884 class ImportDirectoryEntryRef {
 885 public:
 886   ImportDirectoryEntryRef() : OwningObject(nullptr) {}
 887   ImportDirectoryEntryRef(const import_directory_table_entry *Table, uint32_t I,
 888                           const COFFObjectFile *Owner)
 889       : ImportTable(Table), Index(I), OwningObject(Owner) {}
 890
 891   bool operator==(const ImportDirectoryEntryRef &Other) const;
 892   void moveNext();
 893
 894   imported_symbol_iterator imported_symbol_begin() const;
 895   imported_symbol_iterator imported_symbol_end() const;
 896   iterator_range<imported_symbol_iterator> imported_symbols() const;
 897
 898   std::error_code getName(StringRef &Result) const;
 899   std::error_code getImportLookupTableRVA(uint32_t &Result) const;
 900   std::error_code getImportAddressTableRVA(uint32_t &Result) const;
 901
 902   std::error_code
 903   getImportTableEntry(const import_directory_table_entry *&Result) const;
 904
 905   std::error_code
 906   getImportLookupEntry(const import_lookup_table_entry32 *&Result) const;
 907
 908 private:
 909   const import_directory_table_entry *ImportTable;
 910   uint32_t Index;
 911   const COFFObjectFile *OwningObject;
 912 };
 913
 914 class DelayImportDirectoryEntryRef {
 915 public:
 916   DelayImportDirectoryEntryRef() : OwningObject(nullptr) {}
 917   DelayImportDirectoryEntryRef(const delay_import_directory_table_entry *T,
 918                                uint32_t I, const COFFObjectFile *Owner)
 919       : Table(T), Index(I), OwningObject(Owner) {}
 920
 921   bool operator==(const DelayImportDirectoryEntryRef &Other) const;
 922   void moveNext();
 923
 924   imported_symbol_iterator imported_symbol_begin() const;
 925   imported_symbol_iterator imported_symbol_end() const;
 926   iterator_range<imported_symbol_iterator> imported_symbols() const;
 927
 928   std::error_code getName(StringRef &Result) const;
 929   std::error_code getDelayImportTable(
 930       const delay_import_directory_table_entry *&Result) const;
 931   std::error_code getImportAddress(int AddrIndex, uint64_t &Result) const;
 932
 933 private:
 934   const delay_import_directory_table_entry *Table;
 935   uint32_t Index;
 936   const COFFObjectFile *OwningObject;
 937 };
 938
 939 // The iterator for the export directory table entry.
 940 class ExportDirectoryEntryRef {
 941 public:
 942   ExportDirectoryEntryRef() : OwningObject(nullptr) {}
 943   ExportDirectoryEntryRef(const export_directory_table_entry *Table, uint32_t I,
 944                           const COFFObjectFile *Owner)
 945       : ExportTable(Table), Index(I), OwningObject(Owner) {}
 946
 947   bool operator==(const ExportDirectoryEntryRef &Other) const;
 948   void moveNext();
 949
 950   std::error_code getDllName(StringRef &Result) const;
 951   std::error_code getOrdinalBase(uint32_t &Result) const;
 952   std::error_code getOrdinal(uint32_t &Result) const;
 953   std::error_code getExportRVA(uint32_t &Result) const;
 954   std::error_code getSymbolName(StringRef &Result) const;
 955
 956   std::error_code isForwarder(bool &Result) const;
 957   std::error_code getForwardTo(StringRef &Result) const;
 958
 959 private:
 960   const export_directory_table_entry *ExportTable;
 961   uint32_t Index;
 962   const COFFObjectFile *OwningObject;
 963 };
 964
 965 class ImportedSymbolRef {
 966 public:
 967   ImportedSymbolRef() : OwningObject(nullptr) {}
 968   ImportedSymbolRef(const import_lookup_table_entry32 *Entry, uint32_t I,
 969                     const COFFObjectFile *Owner)
 970       : Entry32(Entry), Entry64(nullptr), Index(I), OwningObject(Owner) {}
 971   ImportedSymbolRef(const import_lookup_table_entry64 *Entry, uint32_t I,
 972                     const COFFObjectFile *Owner)
 973       : Entry32(nullptr), Entry64(Entry), Index(I), OwningObject(Owner) {}
 974
 975   bool operator==(const ImportedSymbolRef &Other) const;
 976   void moveNext();
 977
 978   std::error_code getSymbolName(StringRef &Result) const;
 979   std::error_code getOrdinal(uint16_t &Result) const;
 980
 981 private:
 982   const import_lookup_table_entry32 *Entry32;
 983   const import_lookup_table_entry64 *Entry64;
 984   uint32_t Index;
 985   const COFFObjectFile *OwningObject;
 986 };
 987
 988 class BaseRelocRef {
 989 public:
 990   BaseRelocRef() : OwningObject(nullptr) {}
 991   BaseRelocRef(const coff_base_reloc_block_header *Header,
 992                const COFFObjectFile *Owner)
 993       : Header(Header), Index(0), OwningObject(Owner) {}
 994
 995   bool operator==(const BaseRelocRef &Other) const;
 996   void moveNext();
 997
 998   std::error_code getType(uint8_t &Type) const;
 999   std::error_code getRVA(uint32_t &Result) const;
1000
1001 private:
1002   const coff_base_reloc_block_header *Header;
1003   uint32_t Index;
1004   const COFFObjectFile *OwningObject;
1005 };
1006
1007 } // end namespace object
1008 } // end namespace llvm
1009
1010 #endif