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 (std::vector<COFFYAML::Section>::iterator i = Obj.Sections.begin(), 68 e = Obj.Sections.end(); 69 i != e; ++i) { 70 COFFYAML::Section &Sec = *i; 71 72 // If the name is less than 8 bytes, store it in place, otherwise 73 // store it in the string table. 74 StringRef Name = Sec.Name; 75 76 if (Name.size() <= COFF::NameSize) { 77 std::copy(Name.begin(), Name.end(), Sec.Header.Name); 78 } else { 79 // Add string to the string table and format the index for output. 80 unsigned Index = getStringIndex(Name); 81 std::string str = utostr(Index); 82 if (str.size() > 7) { 83 ErrHandler("string table got too large"); 84 return false; 85 } 86 Sec.Header.Name[0] = '/'; 87 std::copy(str.begin(), str.end(), Sec.Header.Name + 1); 88 } 89 90 if (Sec.Alignment) { 91 if (Sec.Alignment > 8192) { 92 ErrHandler("section alignment is too large"); 93 return false; 94 } 95 if (!isPowerOf2_32(Sec.Alignment)) { 96 ErrHandler("section alignment is not a power of 2"); 97 return false; 98 } 99 Sec.Header.Characteristics |= (Log2_32(Sec.Alignment) + 1) << 20; 100 } 101 } 102 return true; 103 } 104 105 bool parseSymbols() { 106 for (std::vector<COFFYAML::Symbol>::iterator i = Obj.Symbols.begin(), 107 e = Obj.Symbols.end(); 108 i != e; ++i) { 109 COFFYAML::Symbol &Sym = *i; 110 111 // If the name is less than 8 bytes, store it in place, otherwise 112 // store it in the string table. 113 StringRef Name = Sym.Name; 114 if (Name.size() <= COFF::NameSize) { 115 std::copy(Name.begin(), Name.end(), Sym.Header.Name); 116 } else { 117 // Add string to the string table and format the index for output. 118 unsigned Index = getStringIndex(Name); 119 *reinterpret_cast<support::aligned_ulittle32_t *>(Sym.Header.Name + 4) = 120 Index; 121 } 122 123 Sym.Header.Type = Sym.SimpleType; 124 Sym.Header.Type |= Sym.ComplexType << COFF::SCT_COMPLEX_TYPE_SHIFT; 125 } 126 return true; 127 } 128 129 bool parse() { 130 if (!parseSections()) 131 return false; 132 if (!parseSymbols()) 133 return false; 134 return true; 135 } 136 137 unsigned getStringIndex(StringRef Str) { 138 StringMap<unsigned>::iterator i = StringTableMap.find(Str); 139 if (i == StringTableMap.end()) { 140 unsigned Index = StringTable.size(); 141 StringTable.append(Str.begin(), Str.end()); 142 StringTable.push_back(0); 143 StringTableMap[Str] = Index; 144 return Index; 145 } 146 return i->second; 147 } 148 149 COFFYAML::Object &Obj; 150 151 codeview::StringsAndChecksums StringsAndChecksums; 152 BumpPtrAllocator Allocator; 153 StringMap<unsigned> StringTableMap; 154 std::string StringTable; 155 uint32_t SectionTableStart; 156 uint32_t SectionTableSize; 157 158 yaml::ErrorHandler ErrHandler; 159 }; 160 161 enum { DOSStubSize = 128 }; 162 163 } // end anonymous namespace 164 165 // Take a CP and assign addresses and sizes to everything. Returns false if the 166 // layout is not valid to do. 167 static bool layoutOptionalHeader(COFFParser &CP) { 168 if (!CP.isPE()) 169 return true; 170 unsigned PEHeaderSize = CP.is64Bit() ? sizeof(object::pe32plus_header) 171 : sizeof(object::pe32_header); 172 CP.Obj.Header.SizeOfOptionalHeader = 173 PEHeaderSize + 174 sizeof(object::data_directory) * (COFF::NUM_DATA_DIRECTORIES + 1); 175 return true; 176 } 177 178 static yaml::BinaryRef 179 toDebugS(ArrayRef<CodeViewYAML::YAMLDebugSubsection> Subsections, 180 const codeview::StringsAndChecksums &SC, BumpPtrAllocator &Allocator) { 181 using namespace codeview; 182 ExitOnError Err("Error occurred writing .debug$S section"); 183 auto CVSS = 184 Err(CodeViewYAML::toCodeViewSubsectionList(Allocator, Subsections, SC)); 185 186 std::vector<DebugSubsectionRecordBuilder> Builders; 187 uint32_t Size = sizeof(uint32_t); 188 for (auto &SS : CVSS) { 189 DebugSubsectionRecordBuilder B(SS); 190 Size += B.calculateSerializedLength(); 191 Builders.push_back(std::move(B)); 192 } 193 uint8_t *Buffer = Allocator.Allocate<uint8_t>(Size); 194 MutableArrayRef<uint8_t> Output(Buffer, Size); 195 BinaryStreamWriter Writer(Output, support::little); 196 197 Err(Writer.writeInteger<uint32_t>(COFF::DEBUG_SECTION_MAGIC)); 198 for (const auto &B : Builders) { 199 Err(B.commit(Writer, CodeViewContainer::ObjectFile)); 200 } 201 return {Output}; 202 } 203 204 // Take a CP and assign addresses and sizes to everything. Returns false if the 205 // layout is not valid to do. 206 static bool layoutCOFF(COFFParser &CP) { 207 // The section table starts immediately after the header, including the 208 // optional header. 209 CP.SectionTableStart = 210 CP.getHeaderSize() + CP.Obj.Header.SizeOfOptionalHeader; 211 if (CP.isPE()) 212 CP.SectionTableStart += DOSStubSize + sizeof(COFF::PEMagic); 213 CP.SectionTableSize = COFF::SectionSize * CP.Obj.Sections.size(); 214 215 uint32_t CurrentSectionDataOffset = 216 CP.SectionTableStart + CP.SectionTableSize; 217 218 for (COFFYAML::Section &S : CP.Obj.Sections) { 219 // We support specifying exactly one of SectionData or Subsections. So if 220 // there is already some SectionData, then we don't need to do any of this. 221 if (S.Name == ".debug$S" && S.SectionData.binary_size() == 0) { 222 CodeViewYAML::initializeStringsAndChecksums(S.DebugS, 223 CP.StringsAndChecksums); 224 if (CP.StringsAndChecksums.hasChecksums() && 225 CP.StringsAndChecksums.hasStrings()) 226 break; 227 } 228 } 229 230 // Assign each section data address consecutively. 231 for (COFFYAML::Section &S : CP.Obj.Sections) { 232 if (S.Name == ".debug$S") { 233 if (S.SectionData.binary_size() == 0) { 234 assert(CP.StringsAndChecksums.hasStrings() && 235 "Object file does not have debug string table!"); 236 237 S.SectionData = 238 toDebugS(S.DebugS, CP.StringsAndChecksums, CP.Allocator); 239 } 240 } else if (S.Name == ".debug$T") { 241 if (S.SectionData.binary_size() == 0) 242 S.SectionData = CodeViewYAML::toDebugT(S.DebugT, CP.Allocator, S.Name); 243 } else if (S.Name == ".debug$P") { 244 if (S.SectionData.binary_size() == 0) 245 S.SectionData = CodeViewYAML::toDebugT(S.DebugP, CP.Allocator, S.Name); 246 } else if (S.Name == ".debug$H") { 247 if (S.DebugH.hasValue() && S.SectionData.binary_size() == 0) 248 S.SectionData = CodeViewYAML::toDebugH(*S.DebugH, CP.Allocator); 249 } 250 251 if (S.SectionData.binary_size() > 0) { 252 CurrentSectionDataOffset = alignTo(CurrentSectionDataOffset, 253 CP.isPE() ? CP.getFileAlignment() : 4); 254 S.Header.SizeOfRawData = S.SectionData.binary_size(); 255 if (CP.isPE()) 256 S.Header.SizeOfRawData = 257 alignTo(S.Header.SizeOfRawData, CP.getFileAlignment()); 258 S.Header.PointerToRawData = CurrentSectionDataOffset; 259 CurrentSectionDataOffset += S.Header.SizeOfRawData; 260 if (!S.Relocations.empty()) { 261 S.Header.PointerToRelocations = CurrentSectionDataOffset; 262 if (S.Header.Characteristics & COFF::IMAGE_SCN_LNK_NRELOC_OVFL) { 263 S.Header.NumberOfRelocations = 0xffff; 264 CurrentSectionDataOffset += COFF::RelocationSize; 265 } else 266 S.Header.NumberOfRelocations = S.Relocations.size(); 267 CurrentSectionDataOffset += S.Relocations.size() * COFF::RelocationSize; 268 } 269 } else { 270 // Leave SizeOfRawData unaltered. For .bss sections in object files, it 271 // carries the section size. 272 S.Header.PointerToRawData = 0; 273 } 274 } 275 276 uint32_t SymbolTableStart = CurrentSectionDataOffset; 277 278 // Calculate number of symbols. 279 uint32_t NumberOfSymbols = 0; 280 for (std::vector<COFFYAML::Symbol>::iterator i = CP.Obj.Symbols.begin(), 281 e = CP.Obj.Symbols.end(); 282 i != e; ++i) { 283 uint32_t NumberOfAuxSymbols = 0; 284 if (i->FunctionDefinition) 285 NumberOfAuxSymbols += 1; 286 if (i->bfAndefSymbol) 287 NumberOfAuxSymbols += 1; 288 if (i->WeakExternal) 289 NumberOfAuxSymbols += 1; 290 if (!i->File.empty()) 291 NumberOfAuxSymbols += 292 (i->File.size() + CP.getSymbolSize() - 1) / CP.getSymbolSize(); 293 if (i->SectionDefinition) 294 NumberOfAuxSymbols += 1; 295 if (i->CLRToken) 296 NumberOfAuxSymbols += 1; 297 i->Header.NumberOfAuxSymbols = NumberOfAuxSymbols; 298 NumberOfSymbols += 1 + NumberOfAuxSymbols; 299 } 300 301 // Store all the allocated start addresses in the header. 302 CP.Obj.Header.NumberOfSections = CP.Obj.Sections.size(); 303 CP.Obj.Header.NumberOfSymbols = NumberOfSymbols; 304 if (NumberOfSymbols > 0 || CP.StringTable.size() > 4) 305 CP.Obj.Header.PointerToSymbolTable = SymbolTableStart; 306 else 307 CP.Obj.Header.PointerToSymbolTable = 0; 308 309 *reinterpret_cast<support::ulittle32_t *>(&CP.StringTable[0]) = 310 CP.StringTable.size(); 311 312 return true; 313 } 314 315 template <typename value_type> struct binary_le_impl { 316 value_type Value; 317 binary_le_impl(value_type V) : Value(V) {} 318 }; 319 320 template <typename value_type> 321 raw_ostream &operator<<(raw_ostream &OS, 322 const binary_le_impl<value_type> &BLE) { 323 char Buffer[sizeof(BLE.Value)]; 324 support::endian::write<value_type, support::little, support::unaligned>( 325 Buffer, BLE.Value); 326 OS.write(Buffer, sizeof(BLE.Value)); 327 return OS; 328 } 329 330 template <typename value_type> 331 binary_le_impl<value_type> binary_le(value_type V) { 332 return binary_le_impl<value_type>(V); 333 } 334 335 template <size_t NumBytes> struct zeros_impl {}; 336 337 template <size_t NumBytes> 338 raw_ostream &operator<<(raw_ostream &OS, const zeros_impl<NumBytes> &) { 339 char Buffer[NumBytes]; 340 memset(Buffer, 0, sizeof(Buffer)); 341 OS.write(Buffer, sizeof(Buffer)); 342 return OS; 343 } 344 345 template <typename T> zeros_impl<sizeof(T)> zeros(const T &) { 346 return zeros_impl<sizeof(T)>(); 347 } 348 349 template <typename T> 350 static uint32_t initializeOptionalHeader(COFFParser &CP, uint16_t Magic, 351 T Header) { 352 memset(Header, 0, sizeof(*Header)); 353 Header->Magic = Magic; 354 Header->SectionAlignment = CP.Obj.OptionalHeader->Header.SectionAlignment; 355 Header->FileAlignment = CP.Obj.OptionalHeader->Header.FileAlignment; 356 uint32_t SizeOfCode = 0, SizeOfInitializedData = 0, 357 SizeOfUninitializedData = 0; 358 uint32_t SizeOfHeaders = alignTo(CP.SectionTableStart + CP.SectionTableSize, 359 Header->FileAlignment); 360 uint32_t SizeOfImage = alignTo(SizeOfHeaders, Header->SectionAlignment); 361 uint32_t BaseOfData = 0; 362 for (const COFFYAML::Section &S : CP.Obj.Sections) { 363 if (S.Header.Characteristics & COFF::IMAGE_SCN_CNT_CODE) 364 SizeOfCode += S.Header.SizeOfRawData; 365 if (S.Header.Characteristics & COFF::IMAGE_SCN_CNT_INITIALIZED_DATA) 366 SizeOfInitializedData += S.Header.SizeOfRawData; 367 if (S.Header.Characteristics & COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA) 368 SizeOfUninitializedData += S.Header.SizeOfRawData; 369 if (S.Name.equals(".text")) 370 Header->BaseOfCode = S.Header.VirtualAddress; // RVA 371 else if (S.Name.equals(".data")) 372 BaseOfData = S.Header.VirtualAddress; // RVA 373 if (S.Header.VirtualAddress) 374 SizeOfImage += alignTo(S.Header.VirtualSize, Header->SectionAlignment); 375 } 376 Header->SizeOfCode = SizeOfCode; 377 Header->SizeOfInitializedData = SizeOfInitializedData; 378 Header->SizeOfUninitializedData = SizeOfUninitializedData; 379 Header->AddressOfEntryPoint = 380 CP.Obj.OptionalHeader->Header.AddressOfEntryPoint; // RVA 381 Header->ImageBase = CP.Obj.OptionalHeader->Header.ImageBase; 382 Header->MajorOperatingSystemVersion = 383 CP.Obj.OptionalHeader->Header.MajorOperatingSystemVersion; 384 Header->MinorOperatingSystemVersion = 385 CP.Obj.OptionalHeader->Header.MinorOperatingSystemVersion; 386 Header->MajorImageVersion = CP.Obj.OptionalHeader->Header.MajorImageVersion; 387 Header->MinorImageVersion = CP.Obj.OptionalHeader->Header.MinorImageVersion; 388 Header->MajorSubsystemVersion = 389 CP.Obj.OptionalHeader->Header.MajorSubsystemVersion; 390 Header->MinorSubsystemVersion = 391 CP.Obj.OptionalHeader->Header.MinorSubsystemVersion; 392 Header->SizeOfImage = SizeOfImage; 393 Header->SizeOfHeaders = SizeOfHeaders; 394 Header->Subsystem = CP.Obj.OptionalHeader->Header.Subsystem; 395 Header->DLLCharacteristics = CP.Obj.OptionalHeader->Header.DLLCharacteristics; 396 Header->SizeOfStackReserve = CP.Obj.OptionalHeader->Header.SizeOfStackReserve; 397 Header->SizeOfStackCommit = CP.Obj.OptionalHeader->Header.SizeOfStackCommit; 398 Header->SizeOfHeapReserve = CP.Obj.OptionalHeader->Header.SizeOfHeapReserve; 399 Header->SizeOfHeapCommit = CP.Obj.OptionalHeader->Header.SizeOfHeapCommit; 400 Header->NumberOfRvaAndSize = COFF::NUM_DATA_DIRECTORIES + 1; 401 return BaseOfData; 402 } 403 404 static bool writeCOFF(COFFParser &CP, raw_ostream &OS) { 405 if (CP.isPE()) { 406 // PE files start with a DOS stub. 407 object::dos_header DH; 408 memset(&DH, 0, sizeof(DH)); 409 410 // DOS EXEs start with "MZ" magic. 411 DH.Magic[0] = 'M'; 412 DH.Magic[1] = 'Z'; 413 // Initializing the AddressOfRelocationTable is strictly optional but 414 // mollifies certain tools which expect it to have a value greater than 415 // 0x40. 416 DH.AddressOfRelocationTable = sizeof(DH); 417 // This is the address of the PE signature. 418 DH.AddressOfNewExeHeader = DOSStubSize; 419 420 // Write out our DOS stub. 421 OS.write(reinterpret_cast<char *>(&DH), sizeof(DH)); 422 // Write padding until we reach the position of where our PE signature 423 // should live. 424 OS.write_zeros(DOSStubSize - sizeof(DH)); 425 // Write out the PE signature. 426 OS.write(COFF::PEMagic, sizeof(COFF::PEMagic)); 427 } 428 if (CP.useBigObj()) { 429 OS << binary_le(static_cast<uint16_t>(COFF::IMAGE_FILE_MACHINE_UNKNOWN)) 430 << binary_le(static_cast<uint16_t>(0xffff)) 431 << binary_le( 432 static_cast<uint16_t>(COFF::BigObjHeader::MinBigObjectVersion)) 433 << binary_le(CP.Obj.Header.Machine) 434 << binary_le(CP.Obj.Header.TimeDateStamp); 435 OS.write(COFF::BigObjMagic, sizeof(COFF::BigObjMagic)); 436 OS << zeros(uint32_t(0)) << zeros(uint32_t(0)) << zeros(uint32_t(0)) 437 << zeros(uint32_t(0)) << binary_le(CP.Obj.Header.NumberOfSections) 438 << binary_le(CP.Obj.Header.PointerToSymbolTable) 439 << binary_le(CP.Obj.Header.NumberOfSymbols); 440 } else { 441 OS << binary_le(CP.Obj.Header.Machine) 442 << binary_le(static_cast<int16_t>(CP.Obj.Header.NumberOfSections)) 443 << binary_le(CP.Obj.Header.TimeDateStamp) 444 << binary_le(CP.Obj.Header.PointerToSymbolTable) 445 << binary_le(CP.Obj.Header.NumberOfSymbols) 446 << binary_le(CP.Obj.Header.SizeOfOptionalHeader) 447 << binary_le(CP.Obj.Header.Characteristics); 448 } 449 if (CP.isPE()) { 450 if (CP.is64Bit()) { 451 object::pe32plus_header PEH; 452 initializeOptionalHeader(CP, COFF::PE32Header::PE32_PLUS, &PEH); 453 OS.write(reinterpret_cast<char *>(&PEH), sizeof(PEH)); 454 } else { 455 object::pe32_header PEH; 456 uint32_t BaseOfData = 457 initializeOptionalHeader(CP, COFF::PE32Header::PE32, &PEH); 458 PEH.BaseOfData = BaseOfData; 459 OS.write(reinterpret_cast<char *>(&PEH), sizeof(PEH)); 460 } 461 for (const Optional<COFF::DataDirectory> &DD : 462 CP.Obj.OptionalHeader->DataDirectories) { 463 if (!DD.hasValue()) { 464 OS << zeros(uint32_t(0)); 465 OS << zeros(uint32_t(0)); 466 } else { 467 OS << binary_le(DD->RelativeVirtualAddress); 468 OS << binary_le(DD->Size); 469 } 470 } 471 OS << zeros(uint32_t(0)); 472 OS << zeros(uint32_t(0)); 473 } 474 475 assert(OS.tell() == CP.SectionTableStart); 476 // Output section table. 477 for (std::vector<COFFYAML::Section>::iterator i = CP.Obj.Sections.begin(), 478 e = CP.Obj.Sections.end(); 479 i != e; ++i) { 480 OS.write(i->Header.Name, COFF::NameSize); 481 OS << binary_le(i->Header.VirtualSize) 482 << binary_le(i->Header.VirtualAddress) 483 << binary_le(i->Header.SizeOfRawData) 484 << binary_le(i->Header.PointerToRawData) 485 << binary_le(i->Header.PointerToRelocations) 486 << binary_le(i->Header.PointerToLineNumbers) 487 << binary_le(i->Header.NumberOfRelocations) 488 << binary_le(i->Header.NumberOfLineNumbers) 489 << binary_le(i->Header.Characteristics); 490 } 491 assert(OS.tell() == CP.SectionTableStart + CP.SectionTableSize); 492 493 unsigned CurSymbol = 0; 494 StringMap<unsigned> SymbolTableIndexMap; 495 for (std::vector<COFFYAML::Symbol>::iterator I = CP.Obj.Symbols.begin(), 496 E = CP.Obj.Symbols.end(); 497 I != E; ++I) { 498 SymbolTableIndexMap[I->Name] = CurSymbol; 499 CurSymbol += 1 + I->Header.NumberOfAuxSymbols; 500 } 501 502 // Output section data. 503 for (const COFFYAML::Section &S : CP.Obj.Sections) { 504 if (S.Header.SizeOfRawData == 0 || S.Header.PointerToRawData == 0) 505 continue; 506 assert(S.Header.PointerToRawData >= OS.tell()); 507 OS.write_zeros(S.Header.PointerToRawData - OS.tell()); 508 S.SectionData.writeAsBinary(OS); 509 assert(S.Header.SizeOfRawData >= S.SectionData.binary_size()); 510 OS.write_zeros(S.Header.SizeOfRawData - S.SectionData.binary_size()); 511 if (S.Header.Characteristics & COFF::IMAGE_SCN_LNK_NRELOC_OVFL) 512 OS << binary_le<uint32_t>(/*VirtualAddress=*/ S.Relocations.size() + 1) 513 << binary_le<uint32_t>(/*SymbolTableIndex=*/ 0) 514 << binary_le<uint16_t>(/*Type=*/ 0); 515 for (const COFFYAML::Relocation &R : S.Relocations) { 516 uint32_t SymbolTableIndex; 517 if (R.SymbolTableIndex) { 518 if (!R.SymbolName.empty()) 519 WithColor::error() 520 << "Both SymbolName and SymbolTableIndex specified\n"; 521 SymbolTableIndex = *R.SymbolTableIndex; 522 } else { 523 SymbolTableIndex = SymbolTableIndexMap[R.SymbolName]; 524 } 525 OS << binary_le(R.VirtualAddress) << binary_le(SymbolTableIndex) 526 << binary_le(R.Type); 527 } 528 } 529 530 // Output symbol table. 531 532 for (std::vector<COFFYAML::Symbol>::const_iterator i = CP.Obj.Symbols.begin(), 533 e = CP.Obj.Symbols.end(); 534 i != e; ++i) { 535 OS.write(i->Header.Name, COFF::NameSize); 536 OS << binary_le(i->Header.Value); 537 if (CP.useBigObj()) 538 OS << binary_le(i->Header.SectionNumber); 539 else 540 OS << binary_le(static_cast<int16_t>(i->Header.SectionNumber)); 541 OS << binary_le(i->Header.Type) << binary_le(i->Header.StorageClass) 542 << binary_le(i->Header.NumberOfAuxSymbols); 543 544 if (i->FunctionDefinition) { 545 OS << binary_le(i->FunctionDefinition->TagIndex) 546 << binary_le(i->FunctionDefinition->TotalSize) 547 << binary_le(i->FunctionDefinition->PointerToLinenumber) 548 << binary_le(i->FunctionDefinition->PointerToNextFunction) 549 << zeros(i->FunctionDefinition->unused); 550 OS.write_zeros(CP.getSymbolSize() - COFF::Symbol16Size); 551 } 552 if (i->bfAndefSymbol) { 553 OS << zeros(i->bfAndefSymbol->unused1) 554 << binary_le(i->bfAndefSymbol->Linenumber) 555 << zeros(i->bfAndefSymbol->unused2) 556 << binary_le(i->bfAndefSymbol->PointerToNextFunction) 557 << zeros(i->bfAndefSymbol->unused3); 558 OS.write_zeros(CP.getSymbolSize() - COFF::Symbol16Size); 559 } 560 if (i->WeakExternal) { 561 OS << binary_le(i->WeakExternal->TagIndex) 562 << binary_le(i->WeakExternal->Characteristics) 563 << zeros(i->WeakExternal->unused); 564 OS.write_zeros(CP.getSymbolSize() - COFF::Symbol16Size); 565 } 566 if (!i->File.empty()) { 567 unsigned SymbolSize = CP.getSymbolSize(); 568 uint32_t NumberOfAuxRecords = 569 (i->File.size() + SymbolSize - 1) / SymbolSize; 570 uint32_t NumberOfAuxBytes = NumberOfAuxRecords * SymbolSize; 571 uint32_t NumZeros = NumberOfAuxBytes - i->File.size(); 572 OS.write(i->File.data(), i->File.size()); 573 OS.write_zeros(NumZeros); 574 } 575 if (i->SectionDefinition) { 576 OS << binary_le(i->SectionDefinition->Length) 577 << binary_le(i->SectionDefinition->NumberOfRelocations) 578 << binary_le(i->SectionDefinition->NumberOfLinenumbers) 579 << binary_le(i->SectionDefinition->CheckSum) 580 << binary_le(static_cast<int16_t>(i->SectionDefinition->Number)) 581 << binary_le(i->SectionDefinition->Selection) 582 << zeros(i->SectionDefinition->unused) 583 << binary_le(static_cast<int16_t>(i->SectionDefinition->Number >> 16)); 584 OS.write_zeros(CP.getSymbolSize() - COFF::Symbol16Size); 585 } 586 if (i->CLRToken) { 587 OS << binary_le(i->CLRToken->AuxType) << zeros(i->CLRToken->unused1) 588 << binary_le(i->CLRToken->SymbolTableIndex) 589 << zeros(i->CLRToken->unused2); 590 OS.write_zeros(CP.getSymbolSize() - COFF::Symbol16Size); 591 } 592 } 593 594 // Output string table. 595 if (CP.Obj.Header.PointerToSymbolTable) 596 OS.write(&CP.StringTable[0], CP.StringTable.size()); 597 return true; 598 } 599 600 namespace llvm { 601 namespace yaml { 602 603 bool yaml2coff(llvm::COFFYAML::Object &Doc, raw_ostream &Out, 604 ErrorHandler ErrHandler) { 605 COFFParser CP(Doc, ErrHandler); 606 if (!CP.parse()) { 607 ErrHandler("failed to parse YAML file"); 608 return false; 609 } 610 611 if (!layoutOptionalHeader(CP)) { 612 ErrHandler("failed to layout optional header for COFF file"); 613 return false; 614 } 615 616 if (!layoutCOFF(CP)) { 617 ErrHandler("failed to layout COFF file"); 618 return false; 619 } 620 if (!writeCOFF(CP, Out)) { 621 ErrHandler("failed to write COFF file"); 622 return false; 623 } 624 return true; 625 } 626 627 } // namespace yaml 628 } // namespace llvm 629