1 //===- yaml2coff - Convert YAML to a COFF object file ---------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 /// 9 /// \file 10 /// The COFF component of yaml2obj. 11 /// 12 //===----------------------------------------------------------------------===// 13 14 #include "llvm/ADT/STLExtras.h" 15 #include "llvm/ADT/StringExtras.h" 16 #include "llvm/ADT/StringMap.h" 17 #include "llvm/DebugInfo/CodeView/DebugStringTableSubsection.h" 18 #include "llvm/DebugInfo/CodeView/StringsAndChecksums.h" 19 #include "llvm/Object/COFF.h" 20 #include "llvm/ObjectYAML/ObjectYAML.h" 21 #include "llvm/ObjectYAML/yaml2obj.h" 22 #include "llvm/Support/Endian.h" 23 #include "llvm/Support/MemoryBuffer.h" 24 #include "llvm/Support/SourceMgr.h" 25 #include "llvm/Support/WithColor.h" 26 #include "llvm/Support/raw_ostream.h" 27 #include <vector> 28 29 using namespace llvm; 30 31 namespace { 32 33 /// This parses a yaml stream that represents a COFF object file. 34 /// See docs/yaml2obj for the yaml scheema. 35 struct COFFParser { 36 COFFParser(COFFYAML::Object &Obj, yaml::ErrorHandler EH) 37 : Obj(Obj), SectionTableStart(0), SectionTableSize(0), ErrHandler(EH) { 38 // A COFF string table always starts with a 4 byte size field. Offsets into 39 // it include this size, so allocate it now. 40 StringTable.append(4, char(0)); 41 } 42 43 bool useBigObj() const { 44 return static_cast<int32_t>(Obj.Sections.size()) > 45 COFF::MaxNumberOfSections16; 46 } 47 48 bool isPE() const { return Obj.OptionalHeader.hasValue(); } 49 bool is64Bit() const { 50 return Obj.Header.Machine == COFF::IMAGE_FILE_MACHINE_AMD64 || 51 Obj.Header.Machine == COFF::IMAGE_FILE_MACHINE_ARM64; 52 } 53 54 uint32_t getFileAlignment() const { 55 return Obj.OptionalHeader->Header.FileAlignment; 56 } 57 58 unsigned getHeaderSize() const { 59 return useBigObj() ? COFF::Header32Size : COFF::Header16Size; 60 } 61 62 unsigned getSymbolSize() const { 63 return useBigObj() ? COFF::Symbol32Size : COFF::Symbol16Size; 64 } 65 66 bool parseSections() { 67 for (COFFYAML::Section &Sec : Obj.Sections) { 68 // If the name is less than 8 bytes, store it in place, otherwise 69 // store it in the string table. 70 StringRef Name = Sec.Name; 71 72 if (Name.size() <= COFF::NameSize) { 73 std::copy(Name.begin(), Name.end(), Sec.Header.Name); 74 } else { 75 // Add string to the string table and format the index for output. 76 unsigned Index = getStringIndex(Name); 77 std::string str = utostr(Index); 78 if (str.size() > 7) { 79 ErrHandler("string table got too large"); 80 return false; 81 } 82 Sec.Header.Name[0] = '/'; 83 std::copy(str.begin(), str.end(), Sec.Header.Name + 1); 84 } 85 86 if (Sec.Alignment) { 87 if (Sec.Alignment > 8192) { 88 ErrHandler("section alignment is too large"); 89 return false; 90 } 91 if (!isPowerOf2_32(Sec.Alignment)) { 92 ErrHandler("section alignment is not a power of 2"); 93 return false; 94 } 95 Sec.Header.Characteristics |= (Log2_32(Sec.Alignment) + 1) << 20; 96 } 97 } 98 return true; 99 } 100 101 bool parseSymbols() { 102 for (COFFYAML::Symbol &Sym : Obj.Symbols) { 103 // If the name is less than 8 bytes, store it in place, otherwise 104 // store it in the string table. 105 StringRef Name = Sym.Name; 106 if (Name.size() <= COFF::NameSize) { 107 std::copy(Name.begin(), Name.end(), Sym.Header.Name); 108 } else { 109 // Add string to the string table and format the index for output. 110 unsigned Index = getStringIndex(Name); 111 *reinterpret_cast<support::aligned_ulittle32_t *>(Sym.Header.Name + 4) = 112 Index; 113 } 114 115 Sym.Header.Type = Sym.SimpleType; 116 Sym.Header.Type |= Sym.ComplexType << COFF::SCT_COMPLEX_TYPE_SHIFT; 117 } 118 return true; 119 } 120 121 bool parse() { 122 if (!parseSections()) 123 return false; 124 if (!parseSymbols()) 125 return false; 126 return true; 127 } 128 129 unsigned getStringIndex(StringRef Str) { 130 StringMap<unsigned>::iterator i = StringTableMap.find(Str); 131 if (i == StringTableMap.end()) { 132 unsigned Index = StringTable.size(); 133 StringTable.append(Str.begin(), Str.end()); 134 StringTable.push_back(0); 135 StringTableMap[Str] = Index; 136 return Index; 137 } 138 return i->second; 139 } 140 141 COFFYAML::Object &Obj; 142 143 codeview::StringsAndChecksums StringsAndChecksums; 144 BumpPtrAllocator Allocator; 145 StringMap<unsigned> StringTableMap; 146 std::string StringTable; 147 uint32_t SectionTableStart; 148 uint32_t SectionTableSize; 149 150 yaml::ErrorHandler ErrHandler; 151 }; 152 153 enum { DOSStubSize = 128 }; 154 155 } // end anonymous namespace 156 157 // Take a CP and assign addresses and sizes to everything. Returns false if the 158 // layout is not valid to do. 159 static bool layoutOptionalHeader(COFFParser &CP) { 160 if (!CP.isPE()) 161 return true; 162 unsigned PEHeaderSize = CP.is64Bit() ? sizeof(object::pe32plus_header) 163 : sizeof(object::pe32_header); 164 CP.Obj.Header.SizeOfOptionalHeader = 165 PEHeaderSize + sizeof(object::data_directory) * 166 CP.Obj.OptionalHeader->Header.NumberOfRvaAndSize; 167 return true; 168 } 169 170 static yaml::BinaryRef 171 toDebugS(ArrayRef<CodeViewYAML::YAMLDebugSubsection> Subsections, 172 const codeview::StringsAndChecksums &SC, BumpPtrAllocator &Allocator) { 173 using namespace codeview; 174 ExitOnError Err("Error occurred writing .debug$S section"); 175 auto CVSS = 176 Err(CodeViewYAML::toCodeViewSubsectionList(Allocator, Subsections, SC)); 177 178 std::vector<DebugSubsectionRecordBuilder> Builders; 179 uint32_t Size = sizeof(uint32_t); 180 for (auto &SS : CVSS) { 181 DebugSubsectionRecordBuilder B(SS); 182 Size += B.calculateSerializedLength(); 183 Builders.push_back(std::move(B)); 184 } 185 uint8_t *Buffer = Allocator.Allocate<uint8_t>(Size); 186 MutableArrayRef<uint8_t> Output(Buffer, Size); 187 BinaryStreamWriter Writer(Output, support::little); 188 189 Err(Writer.writeInteger<uint32_t>(COFF::DEBUG_SECTION_MAGIC)); 190 for (const auto &B : Builders) { 191 Err(B.commit(Writer, CodeViewContainer::ObjectFile)); 192 } 193 return {Output}; 194 } 195 196 // Take a CP and assign addresses and sizes to everything. Returns false if the 197 // layout is not valid to do. 198 static bool layoutCOFF(COFFParser &CP) { 199 // The section table starts immediately after the header, including the 200 // optional header. 201 CP.SectionTableStart = 202 CP.getHeaderSize() + CP.Obj.Header.SizeOfOptionalHeader; 203 if (CP.isPE()) 204 CP.SectionTableStart += DOSStubSize + sizeof(COFF::PEMagic); 205 CP.SectionTableSize = COFF::SectionSize * CP.Obj.Sections.size(); 206 207 uint32_t CurrentSectionDataOffset = 208 CP.SectionTableStart + CP.SectionTableSize; 209 210 for (COFFYAML::Section &S : CP.Obj.Sections) { 211 // We support specifying exactly one of SectionData or Subsections. So if 212 // there is already some SectionData, then we don't need to do any of this. 213 if (S.Name == ".debug$S" && S.SectionData.binary_size() == 0) { 214 CodeViewYAML::initializeStringsAndChecksums(S.DebugS, 215 CP.StringsAndChecksums); 216 if (CP.StringsAndChecksums.hasChecksums() && 217 CP.StringsAndChecksums.hasStrings()) 218 break; 219 } 220 } 221 222 // Assign each section data address consecutively. 223 for (COFFYAML::Section &S : CP.Obj.Sections) { 224 if (S.Name == ".debug$S") { 225 if (S.SectionData.binary_size() == 0) { 226 assert(CP.StringsAndChecksums.hasStrings() && 227 "Object file does not have debug string table!"); 228 229 S.SectionData = 230 toDebugS(S.DebugS, CP.StringsAndChecksums, CP.Allocator); 231 } 232 } else if (S.Name == ".debug$T") { 233 if (S.SectionData.binary_size() == 0) 234 S.SectionData = CodeViewYAML::toDebugT(S.DebugT, CP.Allocator, S.Name); 235 } else if (S.Name == ".debug$P") { 236 if (S.SectionData.binary_size() == 0) 237 S.SectionData = CodeViewYAML::toDebugT(S.DebugP, CP.Allocator, S.Name); 238 } else if (S.Name == ".debug$H") { 239 if (S.DebugH.hasValue() && S.SectionData.binary_size() == 0) 240 S.SectionData = CodeViewYAML::toDebugH(*S.DebugH, CP.Allocator); 241 } 242 243 if (S.SectionData.binary_size() > 0) { 244 CurrentSectionDataOffset = alignTo(CurrentSectionDataOffset, 245 CP.isPE() ? CP.getFileAlignment() : 4); 246 S.Header.SizeOfRawData = S.SectionData.binary_size(); 247 if (CP.isPE()) 248 S.Header.SizeOfRawData = 249 alignTo(S.Header.SizeOfRawData, CP.getFileAlignment()); 250 S.Header.PointerToRawData = CurrentSectionDataOffset; 251 CurrentSectionDataOffset += S.Header.SizeOfRawData; 252 if (!S.Relocations.empty()) { 253 S.Header.PointerToRelocations = CurrentSectionDataOffset; 254 if (S.Header.Characteristics & COFF::IMAGE_SCN_LNK_NRELOC_OVFL) { 255 S.Header.NumberOfRelocations = 0xffff; 256 CurrentSectionDataOffset += COFF::RelocationSize; 257 } else 258 S.Header.NumberOfRelocations = S.Relocations.size(); 259 CurrentSectionDataOffset += S.Relocations.size() * COFF::RelocationSize; 260 } 261 } else { 262 // Leave SizeOfRawData unaltered. For .bss sections in object files, it 263 // carries the section size. 264 S.Header.PointerToRawData = 0; 265 } 266 } 267 268 uint32_t SymbolTableStart = CurrentSectionDataOffset; 269 270 // Calculate number of symbols. 271 uint32_t NumberOfSymbols = 0; 272 for (std::vector<COFFYAML::Symbol>::iterator i = CP.Obj.Symbols.begin(), 273 e = CP.Obj.Symbols.end(); 274 i != e; ++i) { 275 uint32_t NumberOfAuxSymbols = 0; 276 if (i->FunctionDefinition) 277 NumberOfAuxSymbols += 1; 278 if (i->bfAndefSymbol) 279 NumberOfAuxSymbols += 1; 280 if (i->WeakExternal) 281 NumberOfAuxSymbols += 1; 282 if (!i->File.empty()) 283 NumberOfAuxSymbols += 284 (i->File.size() + CP.getSymbolSize() - 1) / CP.getSymbolSize(); 285 if (i->SectionDefinition) 286 NumberOfAuxSymbols += 1; 287 if (i->CLRToken) 288 NumberOfAuxSymbols += 1; 289 i->Header.NumberOfAuxSymbols = NumberOfAuxSymbols; 290 NumberOfSymbols += 1 + NumberOfAuxSymbols; 291 } 292 293 // Store all the allocated start addresses in the header. 294 CP.Obj.Header.NumberOfSections = CP.Obj.Sections.size(); 295 CP.Obj.Header.NumberOfSymbols = NumberOfSymbols; 296 if (NumberOfSymbols > 0 || CP.StringTable.size() > 4) 297 CP.Obj.Header.PointerToSymbolTable = SymbolTableStart; 298 else 299 CP.Obj.Header.PointerToSymbolTable = 0; 300 301 *reinterpret_cast<support::ulittle32_t *>(&CP.StringTable[0]) = 302 CP.StringTable.size(); 303 304 return true; 305 } 306 307 template <typename value_type> struct binary_le_impl { 308 value_type Value; 309 binary_le_impl(value_type V) : Value(V) {} 310 }; 311 312 template <typename value_type> 313 raw_ostream &operator<<(raw_ostream &OS, 314 const binary_le_impl<value_type> &BLE) { 315 char Buffer[sizeof(BLE.Value)]; 316 support::endian::write<value_type, support::little, support::unaligned>( 317 Buffer, BLE.Value); 318 OS.write(Buffer, sizeof(BLE.Value)); 319 return OS; 320 } 321 322 template <typename value_type> 323 binary_le_impl<value_type> binary_le(value_type V) { 324 return binary_le_impl<value_type>(V); 325 } 326 327 template <size_t NumBytes> struct zeros_impl {}; 328 329 template <size_t NumBytes> 330 raw_ostream &operator<<(raw_ostream &OS, const zeros_impl<NumBytes> &) { 331 char Buffer[NumBytes]; 332 memset(Buffer, 0, sizeof(Buffer)); 333 OS.write(Buffer, sizeof(Buffer)); 334 return OS; 335 } 336 337 template <typename T> zeros_impl<sizeof(T)> zeros(const T &) { 338 return zeros_impl<sizeof(T)>(); 339 } 340 341 template <typename T> 342 static uint32_t initializeOptionalHeader(COFFParser &CP, uint16_t Magic, 343 T Header) { 344 memset(Header, 0, sizeof(*Header)); 345 Header->Magic = Magic; 346 Header->SectionAlignment = CP.Obj.OptionalHeader->Header.SectionAlignment; 347 Header->FileAlignment = CP.Obj.OptionalHeader->Header.FileAlignment; 348 uint32_t SizeOfCode = 0, SizeOfInitializedData = 0, 349 SizeOfUninitializedData = 0; 350 uint32_t SizeOfHeaders = alignTo(CP.SectionTableStart + CP.SectionTableSize, 351 Header->FileAlignment); 352 uint32_t SizeOfImage = alignTo(SizeOfHeaders, Header->SectionAlignment); 353 uint32_t BaseOfData = 0; 354 for (const COFFYAML::Section &S : CP.Obj.Sections) { 355 if (S.Header.Characteristics & COFF::IMAGE_SCN_CNT_CODE) 356 SizeOfCode += S.Header.SizeOfRawData; 357 if (S.Header.Characteristics & COFF::IMAGE_SCN_CNT_INITIALIZED_DATA) 358 SizeOfInitializedData += S.Header.SizeOfRawData; 359 if (S.Header.Characteristics & COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA) 360 SizeOfUninitializedData += S.Header.SizeOfRawData; 361 if (S.Name.equals(".text")) 362 Header->BaseOfCode = S.Header.VirtualAddress; // RVA 363 else if (S.Name.equals(".data")) 364 BaseOfData = S.Header.VirtualAddress; // RVA 365 if (S.Header.VirtualAddress) 366 SizeOfImage += alignTo(S.Header.VirtualSize, Header->SectionAlignment); 367 } 368 Header->SizeOfCode = SizeOfCode; 369 Header->SizeOfInitializedData = SizeOfInitializedData; 370 Header->SizeOfUninitializedData = SizeOfUninitializedData; 371 Header->AddressOfEntryPoint = 372 CP.Obj.OptionalHeader->Header.AddressOfEntryPoint; // RVA 373 Header->ImageBase = CP.Obj.OptionalHeader->Header.ImageBase; 374 Header->MajorOperatingSystemVersion = 375 CP.Obj.OptionalHeader->Header.MajorOperatingSystemVersion; 376 Header->MinorOperatingSystemVersion = 377 CP.Obj.OptionalHeader->Header.MinorOperatingSystemVersion; 378 Header->MajorImageVersion = CP.Obj.OptionalHeader->Header.MajorImageVersion; 379 Header->MinorImageVersion = CP.Obj.OptionalHeader->Header.MinorImageVersion; 380 Header->MajorSubsystemVersion = 381 CP.Obj.OptionalHeader->Header.MajorSubsystemVersion; 382 Header->MinorSubsystemVersion = 383 CP.Obj.OptionalHeader->Header.MinorSubsystemVersion; 384 Header->SizeOfImage = SizeOfImage; 385 Header->SizeOfHeaders = SizeOfHeaders; 386 Header->Subsystem = CP.Obj.OptionalHeader->Header.Subsystem; 387 Header->DLLCharacteristics = CP.Obj.OptionalHeader->Header.DLLCharacteristics; 388 Header->SizeOfStackReserve = CP.Obj.OptionalHeader->Header.SizeOfStackReserve; 389 Header->SizeOfStackCommit = CP.Obj.OptionalHeader->Header.SizeOfStackCommit; 390 Header->SizeOfHeapReserve = CP.Obj.OptionalHeader->Header.SizeOfHeapReserve; 391 Header->SizeOfHeapCommit = CP.Obj.OptionalHeader->Header.SizeOfHeapCommit; 392 Header->NumberOfRvaAndSize = CP.Obj.OptionalHeader->Header.NumberOfRvaAndSize; 393 return BaseOfData; 394 } 395 396 static bool writeCOFF(COFFParser &CP, raw_ostream &OS) { 397 if (CP.isPE()) { 398 // PE files start with a DOS stub. 399 object::dos_header DH; 400 memset(&DH, 0, sizeof(DH)); 401 402 // DOS EXEs start with "MZ" magic. 403 DH.Magic[0] = 'M'; 404 DH.Magic[1] = 'Z'; 405 // Initializing the AddressOfRelocationTable is strictly optional but 406 // mollifies certain tools which expect it to have a value greater than 407 // 0x40. 408 DH.AddressOfRelocationTable = sizeof(DH); 409 // This is the address of the PE signature. 410 DH.AddressOfNewExeHeader = DOSStubSize; 411 412 // Write out our DOS stub. 413 OS.write(reinterpret_cast<char *>(&DH), sizeof(DH)); 414 // Write padding until we reach the position of where our PE signature 415 // should live. 416 OS.write_zeros(DOSStubSize - sizeof(DH)); 417 // Write out the PE signature. 418 OS.write(COFF::PEMagic, sizeof(COFF::PEMagic)); 419 } 420 if (CP.useBigObj()) { 421 OS << binary_le(static_cast<uint16_t>(COFF::IMAGE_FILE_MACHINE_UNKNOWN)) 422 << binary_le(static_cast<uint16_t>(0xffff)) 423 << binary_le( 424 static_cast<uint16_t>(COFF::BigObjHeader::MinBigObjectVersion)) 425 << binary_le(CP.Obj.Header.Machine) 426 << binary_le(CP.Obj.Header.TimeDateStamp); 427 OS.write(COFF::BigObjMagic, sizeof(COFF::BigObjMagic)); 428 OS << zeros(uint32_t(0)) << zeros(uint32_t(0)) << zeros(uint32_t(0)) 429 << zeros(uint32_t(0)) << binary_le(CP.Obj.Header.NumberOfSections) 430 << binary_le(CP.Obj.Header.PointerToSymbolTable) 431 << binary_le(CP.Obj.Header.NumberOfSymbols); 432 } else { 433 OS << binary_le(CP.Obj.Header.Machine) 434 << binary_le(static_cast<int16_t>(CP.Obj.Header.NumberOfSections)) 435 << binary_le(CP.Obj.Header.TimeDateStamp) 436 << binary_le(CP.Obj.Header.PointerToSymbolTable) 437 << binary_le(CP.Obj.Header.NumberOfSymbols) 438 << binary_le(CP.Obj.Header.SizeOfOptionalHeader) 439 << binary_le(CP.Obj.Header.Characteristics); 440 } 441 if (CP.isPE()) { 442 if (CP.is64Bit()) { 443 object::pe32plus_header PEH; 444 initializeOptionalHeader(CP, COFF::PE32Header::PE32_PLUS, &PEH); 445 OS.write(reinterpret_cast<char *>(&PEH), sizeof(PEH)); 446 } else { 447 object::pe32_header PEH; 448 uint32_t BaseOfData = 449 initializeOptionalHeader(CP, COFF::PE32Header::PE32, &PEH); 450 PEH.BaseOfData = BaseOfData; 451 OS.write(reinterpret_cast<char *>(&PEH), sizeof(PEH)); 452 } 453 for (uint32_t I = 0; I < CP.Obj.OptionalHeader->Header.NumberOfRvaAndSize; 454 ++I) { 455 const Optional<COFF::DataDirectory> *DataDirectories = 456 CP.Obj.OptionalHeader->DataDirectories; 457 uint32_t NumDataDir = sizeof(CP.Obj.OptionalHeader->DataDirectories) / 458 sizeof(Optional<COFF::DataDirectory>); 459 if (I >= NumDataDir || !DataDirectories[I].hasValue()) { 460 OS << zeros(uint32_t(0)); 461 OS << zeros(uint32_t(0)); 462 } else { 463 OS << binary_le(DataDirectories[I]->RelativeVirtualAddress); 464 OS << binary_le(DataDirectories[I]->Size); 465 } 466 } 467 } 468 469 assert(OS.tell() == CP.SectionTableStart); 470 // Output section table. 471 for (const COFFYAML::Section &S : CP.Obj.Sections) { 472 OS.write(S.Header.Name, COFF::NameSize); 473 OS << binary_le(S.Header.VirtualSize) 474 << binary_le(S.Header.VirtualAddress) 475 << binary_le(S.Header.SizeOfRawData) 476 << binary_le(S.Header.PointerToRawData) 477 << binary_le(S.Header.PointerToRelocations) 478 << binary_le(S.Header.PointerToLineNumbers) 479 << binary_le(S.Header.NumberOfRelocations) 480 << binary_le(S.Header.NumberOfLineNumbers) 481 << binary_le(S.Header.Characteristics); 482 } 483 assert(OS.tell() == CP.SectionTableStart + CP.SectionTableSize); 484 485 unsigned CurSymbol = 0; 486 StringMap<unsigned> SymbolTableIndexMap; 487 for (const COFFYAML::Symbol &Sym : CP.Obj.Symbols) { 488 SymbolTableIndexMap[Sym.Name] = CurSymbol; 489 CurSymbol += 1 + Sym.Header.NumberOfAuxSymbols; 490 } 491 492 // Output section data. 493 for (const COFFYAML::Section &S : CP.Obj.Sections) { 494 if (S.Header.SizeOfRawData == 0 || S.Header.PointerToRawData == 0) 495 continue; 496 assert(S.Header.PointerToRawData >= OS.tell()); 497 OS.write_zeros(S.Header.PointerToRawData - OS.tell()); 498 S.SectionData.writeAsBinary(OS); 499 assert(S.Header.SizeOfRawData >= S.SectionData.binary_size()); 500 OS.write_zeros(S.Header.SizeOfRawData - S.SectionData.binary_size()); 501 if (S.Header.Characteristics & COFF::IMAGE_SCN_LNK_NRELOC_OVFL) 502 OS << binary_le<uint32_t>(/*VirtualAddress=*/ S.Relocations.size() + 1) 503 << binary_le<uint32_t>(/*SymbolTableIndex=*/ 0) 504 << binary_le<uint16_t>(/*Type=*/ 0); 505 for (const COFFYAML::Relocation &R : S.Relocations) { 506 uint32_t SymbolTableIndex; 507 if (R.SymbolTableIndex) { 508 if (!R.SymbolName.empty()) 509 WithColor::error() 510 << "Both SymbolName and SymbolTableIndex specified\n"; 511 SymbolTableIndex = *R.SymbolTableIndex; 512 } else { 513 SymbolTableIndex = SymbolTableIndexMap[R.SymbolName]; 514 } 515 OS << binary_le(R.VirtualAddress) << binary_le(SymbolTableIndex) 516 << binary_le(R.Type); 517 } 518 } 519 520 // Output symbol table. 521 522 for (std::vector<COFFYAML::Symbol>::const_iterator i = CP.Obj.Symbols.begin(), 523 e = CP.Obj.Symbols.end(); 524 i != e; ++i) { 525 OS.write(i->Header.Name, COFF::NameSize); 526 OS << binary_le(i->Header.Value); 527 if (CP.useBigObj()) 528 OS << binary_le(i->Header.SectionNumber); 529 else 530 OS << binary_le(static_cast<int16_t>(i->Header.SectionNumber)); 531 OS << binary_le(i->Header.Type) << binary_le(i->Header.StorageClass) 532 << binary_le(i->Header.NumberOfAuxSymbols); 533 534 if (i->FunctionDefinition) { 535 OS << binary_le(i->FunctionDefinition->TagIndex) 536 << binary_le(i->FunctionDefinition->TotalSize) 537 << binary_le(i->FunctionDefinition->PointerToLinenumber) 538 << binary_le(i->FunctionDefinition->PointerToNextFunction) 539 << zeros(i->FunctionDefinition->unused); 540 OS.write_zeros(CP.getSymbolSize() - COFF::Symbol16Size); 541 } 542 if (i->bfAndefSymbol) { 543 OS << zeros(i->bfAndefSymbol->unused1) 544 << binary_le(i->bfAndefSymbol->Linenumber) 545 << zeros(i->bfAndefSymbol->unused2) 546 << binary_le(i->bfAndefSymbol->PointerToNextFunction) 547 << zeros(i->bfAndefSymbol->unused3); 548 OS.write_zeros(CP.getSymbolSize() - COFF::Symbol16Size); 549 } 550 if (i->WeakExternal) { 551 OS << binary_le(i->WeakExternal->TagIndex) 552 << binary_le(i->WeakExternal->Characteristics) 553 << zeros(i->WeakExternal->unused); 554 OS.write_zeros(CP.getSymbolSize() - COFF::Symbol16Size); 555 } 556 if (!i->File.empty()) { 557 unsigned SymbolSize = CP.getSymbolSize(); 558 uint32_t NumberOfAuxRecords = 559 (i->File.size() + SymbolSize - 1) / SymbolSize; 560 uint32_t NumberOfAuxBytes = NumberOfAuxRecords * SymbolSize; 561 uint32_t NumZeros = NumberOfAuxBytes - i->File.size(); 562 OS.write(i->File.data(), i->File.size()); 563 OS.write_zeros(NumZeros); 564 } 565 if (i->SectionDefinition) { 566 OS << binary_le(i->SectionDefinition->Length) 567 << binary_le(i->SectionDefinition->NumberOfRelocations) 568 << binary_le(i->SectionDefinition->NumberOfLinenumbers) 569 << binary_le(i->SectionDefinition->CheckSum) 570 << binary_le(static_cast<int16_t>(i->SectionDefinition->Number)) 571 << binary_le(i->SectionDefinition->Selection) 572 << zeros(i->SectionDefinition->unused) 573 << binary_le(static_cast<int16_t>(i->SectionDefinition->Number >> 16)); 574 OS.write_zeros(CP.getSymbolSize() - COFF::Symbol16Size); 575 } 576 if (i->CLRToken) { 577 OS << binary_le(i->CLRToken->AuxType) << zeros(i->CLRToken->unused1) 578 << binary_le(i->CLRToken->SymbolTableIndex) 579 << zeros(i->CLRToken->unused2); 580 OS.write_zeros(CP.getSymbolSize() - COFF::Symbol16Size); 581 } 582 } 583 584 // Output string table. 585 if (CP.Obj.Header.PointerToSymbolTable) 586 OS.write(&CP.StringTable[0], CP.StringTable.size()); 587 return true; 588 } 589 590 namespace llvm { 591 namespace yaml { 592 593 bool yaml2coff(llvm::COFFYAML::Object &Doc, raw_ostream &Out, 594 ErrorHandler ErrHandler) { 595 COFFParser CP(Doc, ErrHandler); 596 if (!CP.parse()) { 597 ErrHandler("failed to parse YAML file"); 598 return false; 599 } 600 601 if (!layoutOptionalHeader(CP)) { 602 ErrHandler("failed to layout optional header for COFF file"); 603 return false; 604 } 605 606 if (!layoutCOFF(CP)) { 607 ErrHandler("failed to layout COFF file"); 608 return false; 609 } 610 if (!writeCOFF(CP, Out)) { 611 ErrHandler("failed to write COFF file"); 612 return false; 613 } 614 return true; 615 } 616 617 } // namespace yaml 618 } // namespace llvm 619