1 //===-- ObjectFilePECOFF.cpp ------------------------------------*- 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 #include "ObjectFilePECOFF.h" 11 #include "WindowsMiniDump.h" 12 13 #include "llvm/Support/COFF.h" 14 15 #include "lldb/Core/ArchSpec.h" 16 #include "lldb/Core/DataBuffer.h" 17 #include "lldb/Host/FileSpec.h" 18 #include "lldb/Core/FileSpecList.h" 19 #include "lldb/Core/Module.h" 20 #include "lldb/Core/ModuleSpec.h" 21 #include "lldb/Core/PluginManager.h" 22 #include "lldb/Core/Section.h" 23 #include "lldb/Core/StreamFile.h" 24 #include "lldb/Core/StreamString.h" 25 #include "lldb/Core/Timer.h" 26 #include "lldb/Core/UUID.h" 27 #include "lldb/Symbol/ObjectFile.h" 28 #include "lldb/Target/Process.h" 29 #include "lldb/Target/SectionLoadList.h" 30 #include "lldb/Target/Target.h" 31 32 #define IMAGE_DOS_SIGNATURE 0x5A4D // MZ 33 #define IMAGE_NT_SIGNATURE 0x00004550 // PE00 34 #define OPT_HEADER_MAGIC_PE32 0x010b 35 #define OPT_HEADER_MAGIC_PE32_PLUS 0x020b 36 37 using namespace lldb; 38 using namespace lldb_private; 39 40 void 41 ObjectFilePECOFF::Initialize() 42 { 43 PluginManager::RegisterPlugin (GetPluginNameStatic(), 44 GetPluginDescriptionStatic(), 45 CreateInstance, 46 CreateMemoryInstance, 47 GetModuleSpecifications, 48 SaveCore); 49 } 50 51 void 52 ObjectFilePECOFF::Terminate() 53 { 54 PluginManager::UnregisterPlugin (CreateInstance); 55 } 56 57 58 lldb_private::ConstString 59 ObjectFilePECOFF::GetPluginNameStatic() 60 { 61 static ConstString g_name("pe-coff"); 62 return g_name; 63 } 64 65 const char * 66 ObjectFilePECOFF::GetPluginDescriptionStatic() 67 { 68 return "Portable Executable and Common Object File Format object file reader (32 and 64 bit)"; 69 } 70 71 72 ObjectFile * 73 ObjectFilePECOFF::CreateInstance (const lldb::ModuleSP &module_sp, 74 DataBufferSP& data_sp, 75 lldb::offset_t data_offset, 76 const lldb_private::FileSpec* file, 77 lldb::offset_t file_offset, 78 lldb::offset_t length) 79 { 80 if (!data_sp) 81 { 82 data_sp = file->MemoryMapFileContentsIfLocal(file_offset, length); 83 data_offset = 0; 84 } 85 86 if (ObjectFilePECOFF::MagicBytesMatch(data_sp)) 87 { 88 // Update the data to contain the entire file if it doesn't already 89 if (data_sp->GetByteSize() < length) 90 data_sp = file->MemoryMapFileContentsIfLocal(file_offset, length); 91 std::unique_ptr<ObjectFile> objfile_ap(new ObjectFilePECOFF (module_sp, data_sp, data_offset, file, file_offset, length)); 92 if (objfile_ap.get() && objfile_ap->ParseHeader()) 93 return objfile_ap.release(); 94 } 95 return NULL; 96 } 97 98 ObjectFile * 99 ObjectFilePECOFF::CreateMemoryInstance (const lldb::ModuleSP &module_sp, 100 lldb::DataBufferSP& data_sp, 101 const lldb::ProcessSP &process_sp, 102 lldb::addr_t header_addr) 103 { 104 return NULL; 105 } 106 107 size_t 108 ObjectFilePECOFF::GetModuleSpecifications (const lldb_private::FileSpec& file, 109 lldb::DataBufferSP& data_sp, 110 lldb::offset_t data_offset, 111 lldb::offset_t file_offset, 112 lldb::offset_t length, 113 lldb_private::ModuleSpecList &specs) 114 { 115 const size_t initial_count = specs.GetSize(); 116 117 if (ObjectFilePECOFF::MagicBytesMatch(data_sp)) 118 { 119 DataExtractor data; 120 data.SetData(data_sp, data_offset, length); 121 data.SetByteOrder(eByteOrderLittle); 122 123 dos_header_t dos_header; 124 coff_header_t coff_header; 125 126 if (ParseDOSHeader(data, dos_header)) 127 { 128 lldb::offset_t offset = dos_header.e_lfanew; 129 uint32_t pe_signature = data.GetU32(&offset); 130 if (pe_signature != IMAGE_NT_SIGNATURE) 131 return false; 132 if (ParseCOFFHeader(data, &offset, coff_header)) 133 { 134 ArchSpec spec; 135 if (coff_header.machine == MachineAmd64) 136 { 137 spec.SetTriple("x86_64-pc-windows"); 138 specs.Append(ModuleSpec(file, spec)); 139 } 140 else if (coff_header.machine == MachineX86) 141 { 142 spec.SetTriple("i386-pc-windows"); 143 specs.Append(ModuleSpec(file, spec)); 144 spec.SetTriple("i686-pc-windows"); 145 specs.Append(ModuleSpec(file, spec)); 146 } 147 } 148 } 149 } 150 151 return specs.GetSize() - initial_count; 152 } 153 154 bool 155 ObjectFilePECOFF::SaveCore(const lldb::ProcessSP &process_sp, 156 const lldb_private::FileSpec &outfile, 157 lldb_private::Error &error) 158 { 159 return SaveMiniDump(process_sp, outfile, error); 160 } 161 162 163 bool 164 ObjectFilePECOFF::MagicBytesMatch (DataBufferSP& data_sp) 165 { 166 DataExtractor data(data_sp, eByteOrderLittle, 4); 167 lldb::offset_t offset = 0; 168 uint16_t magic = data.GetU16 (&offset); 169 return magic == IMAGE_DOS_SIGNATURE; 170 } 171 172 lldb::SymbolType 173 ObjectFilePECOFF::MapSymbolType(uint16_t coff_symbol_type) 174 { 175 // TODO: We need to complete this mapping of COFF symbol types to LLDB ones. 176 // For now, here's a hack to make sure our function have types. 177 const auto complex_type = coff_symbol_type >> llvm::COFF::SCT_COMPLEX_TYPE_SHIFT; 178 if (complex_type == llvm::COFF::IMAGE_SYM_DTYPE_FUNCTION) 179 { 180 return lldb::eSymbolTypeCode; 181 } 182 return lldb::eSymbolTypeInvalid; 183 } 184 185 ObjectFilePECOFF::ObjectFilePECOFF (const lldb::ModuleSP &module_sp, 186 DataBufferSP& data_sp, 187 lldb::offset_t data_offset, 188 const FileSpec* file, 189 lldb::offset_t file_offset, 190 lldb::offset_t length) : 191 ObjectFile (module_sp, file, file_offset, length, data_sp, data_offset), 192 m_dos_header (), 193 m_coff_header (), 194 m_coff_header_opt (), 195 m_sect_headers () 196 { 197 ::memset (&m_dos_header, 0, sizeof(m_dos_header)); 198 ::memset (&m_coff_header, 0, sizeof(m_coff_header)); 199 ::memset (&m_coff_header_opt, 0, sizeof(m_coff_header_opt)); 200 } 201 202 203 ObjectFilePECOFF::~ObjectFilePECOFF() 204 { 205 } 206 207 208 bool 209 ObjectFilePECOFF::ParseHeader () 210 { 211 ModuleSP module_sp(GetModule()); 212 if (module_sp) 213 { 214 lldb_private::Mutex::Locker locker(module_sp->GetMutex()); 215 m_sect_headers.clear(); 216 m_data.SetByteOrder (eByteOrderLittle); 217 lldb::offset_t offset = 0; 218 219 if (ParseDOSHeader(m_data, m_dos_header)) 220 { 221 offset = m_dos_header.e_lfanew; 222 uint32_t pe_signature = m_data.GetU32 (&offset); 223 if (pe_signature != IMAGE_NT_SIGNATURE) 224 return false; 225 if (ParseCOFFHeader(m_data, &offset, m_coff_header)) 226 { 227 if (m_coff_header.hdrsize > 0) 228 ParseCOFFOptionalHeader(&offset); 229 ParseSectionHeaders (offset); 230 } 231 return true; 232 } 233 } 234 return false; 235 } 236 237 bool 238 ObjectFilePECOFF::SetLoadAddress(Target &target, addr_t value, bool value_is_offset) 239 { 240 bool changed = false; 241 ModuleSP module_sp = GetModule(); 242 if (module_sp) 243 { 244 size_t num_loaded_sections = 0; 245 SectionList *section_list = GetSectionList (); 246 if (section_list) 247 { 248 if (!value_is_offset) 249 { 250 value -= m_image_base; 251 } 252 253 const size_t num_sections = section_list->GetSize(); 254 size_t sect_idx = 0; 255 256 for (sect_idx = 0; sect_idx < num_sections; ++sect_idx) 257 { 258 // Iterate through the object file sections to find all 259 // of the sections that have SHF_ALLOC in their flag bits. 260 SectionSP section_sp (section_list->GetSectionAtIndex (sect_idx)); 261 if (section_sp && !section_sp->IsThreadSpecific()) 262 { 263 if (target.GetSectionLoadList().SetSectionLoadAddress (section_sp, section_sp->GetFileAddress() + value)) 264 ++num_loaded_sections; 265 } 266 } 267 changed = num_loaded_sections > 0; 268 } 269 } 270 return changed; 271 } 272 273 274 ByteOrder 275 ObjectFilePECOFF::GetByteOrder () const 276 { 277 return eByteOrderLittle; 278 } 279 280 bool 281 ObjectFilePECOFF::IsExecutable() const 282 { 283 return (m_coff_header.flags & llvm::COFF::IMAGE_FILE_DLL) == 0; 284 } 285 286 uint32_t 287 ObjectFilePECOFF::GetAddressByteSize () const 288 { 289 if (m_coff_header_opt.magic == OPT_HEADER_MAGIC_PE32_PLUS) 290 return 8; 291 else if (m_coff_header_opt.magic == OPT_HEADER_MAGIC_PE32) 292 return 4; 293 return 4; 294 } 295 296 //---------------------------------------------------------------------- 297 // NeedsEndianSwap 298 // 299 // Return true if an endian swap needs to occur when extracting data 300 // from this file. 301 //---------------------------------------------------------------------- 302 bool 303 ObjectFilePECOFF::NeedsEndianSwap() const 304 { 305 #if defined(__LITTLE_ENDIAN__) 306 return false; 307 #else 308 return true; 309 #endif 310 } 311 //---------------------------------------------------------------------- 312 // ParseDOSHeader 313 //---------------------------------------------------------------------- 314 bool 315 ObjectFilePECOFF::ParseDOSHeader (DataExtractor &data, dos_header_t &dos_header) 316 { 317 bool success = false; 318 lldb::offset_t offset = 0; 319 success = data.ValidOffsetForDataOfSize(0, sizeof(dos_header)); 320 321 if (success) 322 { 323 dos_header.e_magic = data.GetU16(&offset); // Magic number 324 success = dos_header.e_magic == IMAGE_DOS_SIGNATURE; 325 326 if (success) 327 { 328 dos_header.e_cblp = data.GetU16(&offset); // Bytes on last page of file 329 dos_header.e_cp = data.GetU16(&offset); // Pages in file 330 dos_header.e_crlc = data.GetU16(&offset); // Relocations 331 dos_header.e_cparhdr = data.GetU16(&offset); // Size of header in paragraphs 332 dos_header.e_minalloc = data.GetU16(&offset); // Minimum extra paragraphs needed 333 dos_header.e_maxalloc = data.GetU16(&offset); // Maximum extra paragraphs needed 334 dos_header.e_ss = data.GetU16(&offset); // Initial (relative) SS value 335 dos_header.e_sp = data.GetU16(&offset); // Initial SP value 336 dos_header.e_csum = data.GetU16(&offset); // Checksum 337 dos_header.e_ip = data.GetU16(&offset); // Initial IP value 338 dos_header.e_cs = data.GetU16(&offset); // Initial (relative) CS value 339 dos_header.e_lfarlc = data.GetU16(&offset); // File address of relocation table 340 dos_header.e_ovno = data.GetU16(&offset); // Overlay number 341 342 dos_header.e_res[0] = data.GetU16(&offset); // Reserved words 343 dos_header.e_res[1] = data.GetU16(&offset); // Reserved words 344 dos_header.e_res[2] = data.GetU16(&offset); // Reserved words 345 dos_header.e_res[3] = data.GetU16(&offset); // Reserved words 346 347 dos_header.e_oemid = data.GetU16(&offset); // OEM identifier (for e_oeminfo) 348 dos_header.e_oeminfo = data.GetU16(&offset); // OEM information; e_oemid specific 349 dos_header.e_res2[0] = data.GetU16(&offset); // Reserved words 350 dos_header.e_res2[1] = data.GetU16(&offset); // Reserved words 351 dos_header.e_res2[2] = data.GetU16(&offset); // Reserved words 352 dos_header.e_res2[3] = data.GetU16(&offset); // Reserved words 353 dos_header.e_res2[4] = data.GetU16(&offset); // Reserved words 354 dos_header.e_res2[5] = data.GetU16(&offset); // Reserved words 355 dos_header.e_res2[6] = data.GetU16(&offset); // Reserved words 356 dos_header.e_res2[7] = data.GetU16(&offset); // Reserved words 357 dos_header.e_res2[8] = data.GetU16(&offset); // Reserved words 358 dos_header.e_res2[9] = data.GetU16(&offset); // Reserved words 359 360 dos_header.e_lfanew = data.GetU32(&offset); // File address of new exe header 361 } 362 } 363 if (!success) 364 memset(&dos_header, 0, sizeof(dos_header)); 365 return success; 366 } 367 368 369 //---------------------------------------------------------------------- 370 // ParserCOFFHeader 371 //---------------------------------------------------------------------- 372 bool 373 ObjectFilePECOFF::ParseCOFFHeader(DataExtractor &data, lldb::offset_t *offset_ptr, coff_header_t &coff_header) 374 { 375 bool success = data.ValidOffsetForDataOfSize (*offset_ptr, sizeof(coff_header)); 376 if (success) 377 { 378 coff_header.machine = data.GetU16(offset_ptr); 379 coff_header.nsects = data.GetU16(offset_ptr); 380 coff_header.modtime = data.GetU32(offset_ptr); 381 coff_header.symoff = data.GetU32(offset_ptr); 382 coff_header.nsyms = data.GetU32(offset_ptr); 383 coff_header.hdrsize = data.GetU16(offset_ptr); 384 coff_header.flags = data.GetU16(offset_ptr); 385 } 386 if (!success) 387 memset(&coff_header, 0, sizeof(coff_header)); 388 return success; 389 } 390 391 bool 392 ObjectFilePECOFF::ParseCOFFOptionalHeader(lldb::offset_t *offset_ptr) 393 { 394 bool success = false; 395 const lldb::offset_t end_offset = *offset_ptr + m_coff_header.hdrsize; 396 if (*offset_ptr < end_offset) 397 { 398 success = true; 399 m_coff_header_opt.magic = m_data.GetU16(offset_ptr); 400 m_coff_header_opt.major_linker_version = m_data.GetU8 (offset_ptr); 401 m_coff_header_opt.minor_linker_version = m_data.GetU8 (offset_ptr); 402 m_coff_header_opt.code_size = m_data.GetU32(offset_ptr); 403 m_coff_header_opt.data_size = m_data.GetU32(offset_ptr); 404 m_coff_header_opt.bss_size = m_data.GetU32(offset_ptr); 405 m_coff_header_opt.entry = m_data.GetU32(offset_ptr); 406 m_coff_header_opt.code_offset = m_data.GetU32(offset_ptr); 407 408 const uint32_t addr_byte_size = GetAddressByteSize (); 409 410 if (*offset_ptr < end_offset) 411 { 412 if (m_coff_header_opt.magic == OPT_HEADER_MAGIC_PE32) 413 { 414 // PE32 only 415 m_coff_header_opt.data_offset = m_data.GetU32(offset_ptr); 416 } 417 else 418 m_coff_header_opt.data_offset = 0; 419 420 if (*offset_ptr < end_offset) 421 { 422 m_coff_header_opt.image_base = m_data.GetMaxU64 (offset_ptr, addr_byte_size); 423 m_coff_header_opt.sect_alignment = m_data.GetU32(offset_ptr); 424 m_coff_header_opt.file_alignment = m_data.GetU32(offset_ptr); 425 m_coff_header_opt.major_os_system_version = m_data.GetU16(offset_ptr); 426 m_coff_header_opt.minor_os_system_version = m_data.GetU16(offset_ptr); 427 m_coff_header_opt.major_image_version = m_data.GetU16(offset_ptr); 428 m_coff_header_opt.minor_image_version = m_data.GetU16(offset_ptr); 429 m_coff_header_opt.major_subsystem_version = m_data.GetU16(offset_ptr); 430 m_coff_header_opt.minor_subsystem_version = m_data.GetU16(offset_ptr); 431 m_coff_header_opt.reserved1 = m_data.GetU32(offset_ptr); 432 m_coff_header_opt.image_size = m_data.GetU32(offset_ptr); 433 m_coff_header_opt.header_size = m_data.GetU32(offset_ptr); 434 m_coff_header_opt.checksum = m_data.GetU32(offset_ptr); 435 m_coff_header_opt.subsystem = m_data.GetU16(offset_ptr); 436 m_coff_header_opt.dll_flags = m_data.GetU16(offset_ptr); 437 m_coff_header_opt.stack_reserve_size = m_data.GetMaxU64 (offset_ptr, addr_byte_size); 438 m_coff_header_opt.stack_commit_size = m_data.GetMaxU64 (offset_ptr, addr_byte_size); 439 m_coff_header_opt.heap_reserve_size = m_data.GetMaxU64 (offset_ptr, addr_byte_size); 440 m_coff_header_opt.heap_commit_size = m_data.GetMaxU64 (offset_ptr, addr_byte_size); 441 m_coff_header_opt.loader_flags = m_data.GetU32(offset_ptr); 442 uint32_t num_data_dir_entries = m_data.GetU32(offset_ptr); 443 m_coff_header_opt.data_dirs.clear(); 444 m_coff_header_opt.data_dirs.resize(num_data_dir_entries); 445 uint32_t i; 446 for (i=0; i<num_data_dir_entries; i++) 447 { 448 m_coff_header_opt.data_dirs[i].vmaddr = m_data.GetU32(offset_ptr); 449 m_coff_header_opt.data_dirs[i].vmsize = m_data.GetU32(offset_ptr); 450 } 451 452 m_file_offset = m_coff_header_opt.image_base; 453 m_image_base = m_coff_header_opt.image_base; 454 } 455 } 456 } 457 // Make sure we are on track for section data which follows 458 *offset_ptr = end_offset; 459 return success; 460 } 461 462 463 //---------------------------------------------------------------------- 464 // ParseSectionHeaders 465 //---------------------------------------------------------------------- 466 bool 467 ObjectFilePECOFF::ParseSectionHeaders (uint32_t section_header_data_offset) 468 { 469 const uint32_t nsects = m_coff_header.nsects; 470 m_sect_headers.clear(); 471 472 if (nsects > 0) 473 { 474 const uint32_t addr_byte_size = GetAddressByteSize (); 475 const size_t section_header_byte_size = nsects * sizeof(section_header_t); 476 DataBufferSP section_header_data_sp(m_file.ReadFileContents (section_header_data_offset, section_header_byte_size)); 477 DataExtractor section_header_data (section_header_data_sp, GetByteOrder(), addr_byte_size); 478 479 lldb::offset_t offset = 0; 480 if (section_header_data.ValidOffsetForDataOfSize (offset, section_header_byte_size)) 481 { 482 m_sect_headers.resize(nsects); 483 484 for (uint32_t idx = 0; idx<nsects; ++idx) 485 { 486 const void *name_data = section_header_data.GetData(&offset, 8); 487 if (name_data) 488 { 489 memcpy(m_sect_headers[idx].name, name_data, 8); 490 m_sect_headers[idx].vmsize = section_header_data.GetU32(&offset); 491 m_sect_headers[idx].vmaddr = section_header_data.GetU32(&offset); 492 m_sect_headers[idx].size = section_header_data.GetU32(&offset); 493 m_sect_headers[idx].offset = section_header_data.GetU32(&offset); 494 m_sect_headers[idx].reloff = section_header_data.GetU32(&offset); 495 m_sect_headers[idx].lineoff = section_header_data.GetU32(&offset); 496 m_sect_headers[idx].nreloc = section_header_data.GetU16(&offset); 497 m_sect_headers[idx].nline = section_header_data.GetU16(&offset); 498 m_sect_headers[idx].flags = section_header_data.GetU32(&offset); 499 } 500 } 501 } 502 } 503 504 return m_sect_headers.empty() == false; 505 } 506 507 bool 508 ObjectFilePECOFF::GetSectionName(std::string& sect_name, const section_header_t& sect) 509 { 510 if (sect.name[0] == '/') 511 { 512 lldb::offset_t stroff = strtoul(§.name[1], NULL, 10); 513 lldb::offset_t string_file_offset = m_coff_header.symoff + (m_coff_header.nsyms * 18) + stroff; 514 const char *name = m_data.GetCStr (&string_file_offset); 515 if (name) 516 { 517 sect_name = name; 518 return true; 519 } 520 521 return false; 522 } 523 sect_name = sect.name; 524 return true; 525 } 526 527 //---------------------------------------------------------------------- 528 // GetNListSymtab 529 //---------------------------------------------------------------------- 530 Symtab * 531 ObjectFilePECOFF::GetSymtab() 532 { 533 ModuleSP module_sp(GetModule()); 534 if (module_sp) 535 { 536 lldb_private::Mutex::Locker locker(module_sp->GetMutex()); 537 if (m_symtab_ap.get() == NULL) 538 { 539 SectionList *sect_list = GetSectionList(); 540 m_symtab_ap.reset(new Symtab(this)); 541 Mutex::Locker symtab_locker (m_symtab_ap->GetMutex()); 542 543 const uint32_t num_syms = m_coff_header.nsyms; 544 545 if (num_syms > 0 && m_coff_header.symoff > 0) 546 { 547 const uint32_t symbol_size = 18; 548 const uint32_t addr_byte_size = GetAddressByteSize (); 549 const size_t symbol_data_size = num_syms * symbol_size; 550 // Include the 4-byte string table size at the end of the symbols 551 DataBufferSP symtab_data_sp(m_file.ReadFileContents (m_coff_header.symoff, symbol_data_size + 4)); 552 DataExtractor symtab_data (symtab_data_sp, GetByteOrder(), addr_byte_size); 553 lldb::offset_t offset = symbol_data_size; 554 const uint32_t strtab_size = symtab_data.GetU32 (&offset); 555 DataBufferSP strtab_data_sp(m_file.ReadFileContents (m_coff_header.symoff + symbol_data_size, strtab_size)); 556 DataExtractor strtab_data (strtab_data_sp, GetByteOrder(), addr_byte_size); 557 558 // First 4 bytes should be zeroed after strtab_size has been read, 559 // because it is used as offset 0 to encode a NULL string. 560 uint32_t* strtab_data_start = (uint32_t*)strtab_data_sp->GetBytes(); 561 strtab_data_start[0] = 0; 562 563 offset = 0; 564 std::string symbol_name; 565 Symbol *symbols = m_symtab_ap->Resize (num_syms); 566 for (uint32_t i=0; i<num_syms; ++i) 567 { 568 coff_symbol_t symbol; 569 const uint32_t symbol_offset = offset; 570 const char *symbol_name_cstr = NULL; 571 // If the first 4 bytes of the symbol string are zero, then they 572 // are followed by a 4-byte string table offset. Else these 573 // 8 bytes contain the symbol name 574 if (symtab_data.GetU32 (&offset) == 0) 575 { 576 // Long string that doesn't fit into the symbol table name, 577 // so now we must read the 4 byte string table offset 578 uint32_t strtab_offset = symtab_data.GetU32 (&offset); 579 symbol_name_cstr = strtab_data.PeekCStr (strtab_offset); 580 symbol_name.assign (symbol_name_cstr); 581 } 582 else 583 { 584 // Short string that fits into the symbol table name which is 8 bytes 585 offset += sizeof(symbol.name) - 4; // Skip remaining 586 symbol_name_cstr = symtab_data.PeekCStr (symbol_offset); 587 if (symbol_name_cstr == NULL) 588 break; 589 symbol_name.assign (symbol_name_cstr, sizeof(symbol.name)); 590 } 591 symbol.value = symtab_data.GetU32 (&offset); 592 symbol.sect = symtab_data.GetU16 (&offset); 593 symbol.type = symtab_data.GetU16 (&offset); 594 symbol.storage = symtab_data.GetU8 (&offset); 595 symbol.naux = symtab_data.GetU8 (&offset); 596 symbols[i].GetMangled ().SetValue (ConstString(symbol_name.c_str())); 597 if ((int16_t)symbol.sect >= 1) 598 { 599 Address symbol_addr(sect_list->GetSectionAtIndex(symbol.sect-1), symbol.value); 600 symbols[i].GetAddressRef() = symbol_addr; 601 symbols[i].SetType(MapSymbolType(symbol.type)); 602 } 603 604 if (symbol.naux > 0) 605 { 606 i += symbol.naux; 607 offset += symbol_size; 608 } 609 } 610 611 } 612 613 // Read export header 614 if (coff_data_dir_export_table < m_coff_header_opt.data_dirs.size() 615 && m_coff_header_opt.data_dirs[coff_data_dir_export_table].vmsize > 0 && m_coff_header_opt.data_dirs[coff_data_dir_export_table].vmaddr > 0) 616 { 617 export_directory_entry export_table; 618 uint32_t data_start = m_coff_header_opt.data_dirs[coff_data_dir_export_table].vmaddr; 619 Address address(m_coff_header_opt.image_base + data_start, sect_list); 620 DataBufferSP symtab_data_sp(m_file.ReadFileContents(address.GetSection()->GetFileOffset() + address.GetOffset(), m_coff_header_opt.data_dirs[0].vmsize)); 621 DataExtractor symtab_data (symtab_data_sp, GetByteOrder(), GetAddressByteSize()); 622 lldb::offset_t offset = 0; 623 624 // Read export_table header 625 export_table.characteristics = symtab_data.GetU32(&offset); 626 export_table.time_date_stamp = symtab_data.GetU32(&offset); 627 export_table.major_version = symtab_data.GetU16(&offset); 628 export_table.minor_version = symtab_data.GetU16(&offset); 629 export_table.name = symtab_data.GetU32(&offset); 630 export_table.base = symtab_data.GetU32(&offset); 631 export_table.number_of_functions = symtab_data.GetU32(&offset); 632 export_table.number_of_names = symtab_data.GetU32(&offset); 633 export_table.address_of_functions = symtab_data.GetU32(&offset); 634 export_table.address_of_names = symtab_data.GetU32(&offset); 635 export_table.address_of_name_ordinals = symtab_data.GetU32(&offset); 636 637 bool has_ordinal = export_table.address_of_name_ordinals != 0; 638 639 lldb::offset_t name_offset = export_table.address_of_names - data_start; 640 lldb::offset_t name_ordinal_offset = export_table.address_of_name_ordinals - data_start; 641 642 Symbol *symbols = m_symtab_ap->Resize(export_table.number_of_names); 643 644 std::string symbol_name; 645 646 // Read each export table entry 647 for (size_t i = 0; i < export_table.number_of_names; ++i) 648 { 649 uint32_t name_ordinal = has_ordinal ? symtab_data.GetU16(&name_ordinal_offset) : i; 650 uint32_t name_address = symtab_data.GetU32(&name_offset); 651 652 const char* symbol_name_cstr = symtab_data.PeekCStr(name_address - data_start); 653 symbol_name.assign(symbol_name_cstr); 654 655 lldb::offset_t function_offset = export_table.address_of_functions - data_start + sizeof(uint32_t) * name_ordinal; 656 uint32_t function_rva = symtab_data.GetU32(&function_offset); 657 658 Address symbol_addr(m_coff_header_opt.image_base + function_rva, sect_list); 659 symbols[i].GetMangled().SetValue(ConstString(symbol_name.c_str())); 660 symbols[i].GetAddressRef() = symbol_addr; 661 symbols[i].SetType(lldb::eSymbolTypeCode); 662 symbols[i].SetDebug(true); 663 } 664 } 665 m_symtab_ap->CalculateSymbolSizes(); 666 } 667 } 668 return m_symtab_ap.get(); 669 670 } 671 672 bool 673 ObjectFilePECOFF::IsStripped () 674 { 675 // TODO: determine this for COFF 676 return false; 677 } 678 679 680 681 void 682 ObjectFilePECOFF::CreateSections (SectionList &unified_section_list) 683 { 684 if (!m_sections_ap.get()) 685 { 686 m_sections_ap.reset(new SectionList()); 687 688 ModuleSP module_sp(GetModule()); 689 if (module_sp) 690 { 691 lldb_private::Mutex::Locker locker(module_sp->GetMutex()); 692 const uint32_t nsects = m_sect_headers.size(); 693 ModuleSP module_sp (GetModule()); 694 for (uint32_t idx = 0; idx<nsects; ++idx) 695 { 696 std::string sect_name; 697 GetSectionName (sect_name, m_sect_headers[idx]); 698 ConstString const_sect_name (sect_name.c_str()); 699 static ConstString g_code_sect_name (".code"); 700 static ConstString g_CODE_sect_name ("CODE"); 701 static ConstString g_data_sect_name (".data"); 702 static ConstString g_DATA_sect_name ("DATA"); 703 static ConstString g_bss_sect_name (".bss"); 704 static ConstString g_BSS_sect_name ("BSS"); 705 static ConstString g_debug_sect_name (".debug"); 706 static ConstString g_reloc_sect_name (".reloc"); 707 static ConstString g_stab_sect_name (".stab"); 708 static ConstString g_stabstr_sect_name (".stabstr"); 709 static ConstString g_sect_name_dwarf_debug_abbrev (".debug_abbrev"); 710 static ConstString g_sect_name_dwarf_debug_aranges (".debug_aranges"); 711 static ConstString g_sect_name_dwarf_debug_frame (".debug_frame"); 712 static ConstString g_sect_name_dwarf_debug_info (".debug_info"); 713 static ConstString g_sect_name_dwarf_debug_line (".debug_line"); 714 static ConstString g_sect_name_dwarf_debug_loc (".debug_loc"); 715 static ConstString g_sect_name_dwarf_debug_macinfo (".debug_macinfo"); 716 static ConstString g_sect_name_dwarf_debug_pubnames (".debug_pubnames"); 717 static ConstString g_sect_name_dwarf_debug_pubtypes (".debug_pubtypes"); 718 static ConstString g_sect_name_dwarf_debug_ranges (".debug_ranges"); 719 static ConstString g_sect_name_dwarf_debug_str (".debug_str"); 720 static ConstString g_sect_name_eh_frame (".eh_frame"); 721 static ConstString g_sect_name_go_symtab (".gosymtab"); 722 SectionType section_type = eSectionTypeOther; 723 if (m_sect_headers[idx].flags & llvm::COFF::IMAGE_SCN_CNT_CODE && 724 ((const_sect_name == g_code_sect_name) || (const_sect_name == g_CODE_sect_name))) 725 { 726 section_type = eSectionTypeCode; 727 } 728 else if (m_sect_headers[idx].flags & llvm::COFF::IMAGE_SCN_CNT_INITIALIZED_DATA && 729 ((const_sect_name == g_data_sect_name) || (const_sect_name == g_DATA_sect_name))) 730 { 731 section_type = eSectionTypeData; 732 } 733 else if (m_sect_headers[idx].flags & llvm::COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA && 734 ((const_sect_name == g_bss_sect_name) || (const_sect_name == g_BSS_sect_name))) 735 { 736 if (m_sect_headers[idx].size == 0) 737 section_type = eSectionTypeZeroFill; 738 else 739 section_type = eSectionTypeData; 740 } 741 else if (const_sect_name == g_debug_sect_name) 742 { 743 section_type = eSectionTypeDebug; 744 } 745 else if (const_sect_name == g_stabstr_sect_name) 746 { 747 section_type = eSectionTypeDataCString; 748 } 749 else if (const_sect_name == g_reloc_sect_name) 750 { 751 section_type = eSectionTypeOther; 752 } 753 else if (const_sect_name == g_sect_name_dwarf_debug_abbrev) section_type = eSectionTypeDWARFDebugAbbrev; 754 else if (const_sect_name == g_sect_name_dwarf_debug_aranges) section_type = eSectionTypeDWARFDebugAranges; 755 else if (const_sect_name == g_sect_name_dwarf_debug_frame) section_type = eSectionTypeDWARFDebugFrame; 756 else if (const_sect_name == g_sect_name_dwarf_debug_info) section_type = eSectionTypeDWARFDebugInfo; 757 else if (const_sect_name == g_sect_name_dwarf_debug_line) section_type = eSectionTypeDWARFDebugLine; 758 else if (const_sect_name == g_sect_name_dwarf_debug_loc) section_type = eSectionTypeDWARFDebugLoc; 759 else if (const_sect_name == g_sect_name_dwarf_debug_macinfo) section_type = eSectionTypeDWARFDebugMacInfo; 760 else if (const_sect_name == g_sect_name_dwarf_debug_pubnames) section_type = eSectionTypeDWARFDebugPubNames; 761 else if (const_sect_name == g_sect_name_dwarf_debug_pubtypes) section_type = eSectionTypeDWARFDebugPubTypes; 762 else if (const_sect_name == g_sect_name_dwarf_debug_ranges) section_type = eSectionTypeDWARFDebugRanges; 763 else if (const_sect_name == g_sect_name_dwarf_debug_str) section_type = eSectionTypeDWARFDebugStr; 764 else if (const_sect_name == g_sect_name_eh_frame) section_type = eSectionTypeEHFrame; 765 else if (const_sect_name == g_sect_name_go_symtab) section_type = eSectionTypeGoSymtab; 766 else if (m_sect_headers[idx].flags & llvm::COFF::IMAGE_SCN_CNT_CODE) 767 { 768 section_type = eSectionTypeCode; 769 } 770 else if (m_sect_headers[idx].flags & llvm::COFF::IMAGE_SCN_CNT_INITIALIZED_DATA) 771 { 772 section_type = eSectionTypeData; 773 } 774 else if (m_sect_headers[idx].flags & llvm::COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA) 775 { 776 if (m_sect_headers[idx].size == 0) 777 section_type = eSectionTypeZeroFill; 778 else 779 section_type = eSectionTypeData; 780 } 781 782 // Use a segment ID of the segment index shifted left by 8 so they 783 // never conflict with any of the sections. 784 SectionSP section_sp (new Section (module_sp, // Module to which this section belongs 785 this, // Object file to which this section belongs 786 idx + 1, // Section ID is the 1 based segment index shifted right by 8 bits as not to collide with any of the 256 section IDs that are possible 787 const_sect_name, // Name of this section 788 section_type, // This section is a container of other sections. 789 m_coff_header_opt.image_base + m_sect_headers[idx].vmaddr, // File VM address == addresses as they are found in the object file 790 m_sect_headers[idx].vmsize, // VM size in bytes of this section 791 m_sect_headers[idx].offset, // Offset to the data for this section in the file 792 m_sect_headers[idx].size, // Size in bytes of this section as found in the file 793 m_coff_header_opt.sect_alignment, // Section alignment 794 m_sect_headers[idx].flags)); // Flags for this section 795 796 //section_sp->SetIsEncrypted (segment_is_encrypted); 797 798 unified_section_list.AddSection(section_sp); 799 m_sections_ap->AddSection (section_sp); 800 } 801 } 802 } 803 } 804 805 bool 806 ObjectFilePECOFF::GetUUID (UUID* uuid) 807 { 808 return false; 809 } 810 811 uint32_t 812 ObjectFilePECOFF::GetDependentModules (FileSpecList& files) 813 { 814 return 0; 815 } 816 817 818 //---------------------------------------------------------------------- 819 // Dump 820 // 821 // Dump the specifics of the runtime file container (such as any headers 822 // segments, sections, etc). 823 //---------------------------------------------------------------------- 824 void 825 ObjectFilePECOFF::Dump(Stream *s) 826 { 827 ModuleSP module_sp(GetModule()); 828 if (module_sp) 829 { 830 lldb_private::Mutex::Locker locker(module_sp->GetMutex()); 831 s->Printf("%p: ", static_cast<void*>(this)); 832 s->Indent(); 833 s->PutCString("ObjectFilePECOFF"); 834 835 ArchSpec header_arch; 836 GetArchitecture (header_arch); 837 838 *s << ", file = '" << m_file << "', arch = " << header_arch.GetArchitectureName() << "\n"; 839 840 SectionList *sections = GetSectionList(); 841 if (sections) 842 sections->Dump(s, NULL, true, UINT32_MAX); 843 844 if (m_symtab_ap.get()) 845 m_symtab_ap->Dump(s, NULL, eSortOrderNone); 846 847 if (m_dos_header.e_magic) 848 DumpDOSHeader (s, m_dos_header); 849 if (m_coff_header.machine) 850 { 851 DumpCOFFHeader (s, m_coff_header); 852 if (m_coff_header.hdrsize) 853 DumpOptCOFFHeader (s, m_coff_header_opt); 854 } 855 s->EOL(); 856 DumpSectionHeaders(s); 857 s->EOL(); 858 } 859 } 860 861 //---------------------------------------------------------------------- 862 // DumpDOSHeader 863 // 864 // Dump the MS-DOS header to the specified output stream 865 //---------------------------------------------------------------------- 866 void 867 ObjectFilePECOFF::DumpDOSHeader(Stream *s, const dos_header_t& header) 868 { 869 s->PutCString ("MSDOS Header\n"); 870 s->Printf (" e_magic = 0x%4.4x\n", header.e_magic); 871 s->Printf (" e_cblp = 0x%4.4x\n", header.e_cblp); 872 s->Printf (" e_cp = 0x%4.4x\n", header.e_cp); 873 s->Printf (" e_crlc = 0x%4.4x\n", header.e_crlc); 874 s->Printf (" e_cparhdr = 0x%4.4x\n", header.e_cparhdr); 875 s->Printf (" e_minalloc = 0x%4.4x\n", header.e_minalloc); 876 s->Printf (" e_maxalloc = 0x%4.4x\n", header.e_maxalloc); 877 s->Printf (" e_ss = 0x%4.4x\n", header.e_ss); 878 s->Printf (" e_sp = 0x%4.4x\n", header.e_sp); 879 s->Printf (" e_csum = 0x%4.4x\n", header.e_csum); 880 s->Printf (" e_ip = 0x%4.4x\n", header.e_ip); 881 s->Printf (" e_cs = 0x%4.4x\n", header.e_cs); 882 s->Printf (" e_lfarlc = 0x%4.4x\n", header.e_lfarlc); 883 s->Printf (" e_ovno = 0x%4.4x\n", header.e_ovno); 884 s->Printf (" e_res[4] = { 0x%4.4x, 0x%4.4x, 0x%4.4x, 0x%4.4x }\n", 885 header.e_res[0], 886 header.e_res[1], 887 header.e_res[2], 888 header.e_res[3]); 889 s->Printf (" e_oemid = 0x%4.4x\n", header.e_oemid); 890 s->Printf (" e_oeminfo = 0x%4.4x\n", header.e_oeminfo); 891 s->Printf (" e_res2[10] = { 0x%4.4x, 0x%4.4x, 0x%4.4x, 0x%4.4x, 0x%4.4x, 0x%4.4x, 0x%4.4x, 0x%4.4x, 0x%4.4x, 0x%4.4x }\n", 892 header.e_res2[0], 893 header.e_res2[1], 894 header.e_res2[2], 895 header.e_res2[3], 896 header.e_res2[4], 897 header.e_res2[5], 898 header.e_res2[6], 899 header.e_res2[7], 900 header.e_res2[8], 901 header.e_res2[9]); 902 s->Printf (" e_lfanew = 0x%8.8x\n", header.e_lfanew); 903 } 904 905 //---------------------------------------------------------------------- 906 // DumpCOFFHeader 907 // 908 // Dump the COFF header to the specified output stream 909 //---------------------------------------------------------------------- 910 void 911 ObjectFilePECOFF::DumpCOFFHeader(Stream *s, const coff_header_t& header) 912 { 913 s->PutCString ("COFF Header\n"); 914 s->Printf (" machine = 0x%4.4x\n", header.machine); 915 s->Printf (" nsects = 0x%4.4x\n", header.nsects); 916 s->Printf (" modtime = 0x%8.8x\n", header.modtime); 917 s->Printf (" symoff = 0x%8.8x\n", header.symoff); 918 s->Printf (" nsyms = 0x%8.8x\n", header.nsyms); 919 s->Printf (" hdrsize = 0x%4.4x\n", header.hdrsize); 920 } 921 922 //---------------------------------------------------------------------- 923 // DumpOptCOFFHeader 924 // 925 // Dump the optional COFF header to the specified output stream 926 //---------------------------------------------------------------------- 927 void 928 ObjectFilePECOFF::DumpOptCOFFHeader(Stream *s, const coff_opt_header_t& header) 929 { 930 s->PutCString ("Optional COFF Header\n"); 931 s->Printf (" magic = 0x%4.4x\n", header.magic); 932 s->Printf (" major_linker_version = 0x%2.2x\n", header.major_linker_version); 933 s->Printf (" minor_linker_version = 0x%2.2x\n", header.minor_linker_version); 934 s->Printf (" code_size = 0x%8.8x\n", header.code_size); 935 s->Printf (" data_size = 0x%8.8x\n", header.data_size); 936 s->Printf (" bss_size = 0x%8.8x\n", header.bss_size); 937 s->Printf (" entry = 0x%8.8x\n", header.entry); 938 s->Printf (" code_offset = 0x%8.8x\n", header.code_offset); 939 s->Printf (" data_offset = 0x%8.8x\n", header.data_offset); 940 s->Printf (" image_base = 0x%16.16" PRIx64 "\n", header.image_base); 941 s->Printf (" sect_alignment = 0x%8.8x\n", header.sect_alignment); 942 s->Printf (" file_alignment = 0x%8.8x\n", header.file_alignment); 943 s->Printf (" major_os_system_version = 0x%4.4x\n", header.major_os_system_version); 944 s->Printf (" minor_os_system_version = 0x%4.4x\n", header.minor_os_system_version); 945 s->Printf (" major_image_version = 0x%4.4x\n", header.major_image_version); 946 s->Printf (" minor_image_version = 0x%4.4x\n", header.minor_image_version); 947 s->Printf (" major_subsystem_version = 0x%4.4x\n", header.major_subsystem_version); 948 s->Printf (" minor_subsystem_version = 0x%4.4x\n", header.minor_subsystem_version); 949 s->Printf (" reserved1 = 0x%8.8x\n", header.reserved1); 950 s->Printf (" image_size = 0x%8.8x\n", header.image_size); 951 s->Printf (" header_size = 0x%8.8x\n", header.header_size); 952 s->Printf (" checksum = 0x%8.8x\n", header.checksum); 953 s->Printf (" subsystem = 0x%4.4x\n", header.subsystem); 954 s->Printf (" dll_flags = 0x%4.4x\n", header.dll_flags); 955 s->Printf (" stack_reserve_size = 0x%16.16" PRIx64 "\n", header.stack_reserve_size); 956 s->Printf (" stack_commit_size = 0x%16.16" PRIx64 "\n", header.stack_commit_size); 957 s->Printf (" heap_reserve_size = 0x%16.16" PRIx64 "\n", header.heap_reserve_size); 958 s->Printf (" heap_commit_size = 0x%16.16" PRIx64 "\n", header.heap_commit_size); 959 s->Printf (" loader_flags = 0x%8.8x\n", header.loader_flags); 960 s->Printf (" num_data_dir_entries = 0x%8.8x\n", (uint32_t)header.data_dirs.size()); 961 uint32_t i; 962 for (i=0; i<header.data_dirs.size(); i++) 963 { 964 s->Printf (" data_dirs[%2u] vmaddr = 0x%8.8x, vmsize = 0x%8.8x\n", 965 i, 966 header.data_dirs[i].vmaddr, 967 header.data_dirs[i].vmsize); 968 } 969 } 970 //---------------------------------------------------------------------- 971 // DumpSectionHeader 972 // 973 // Dump a single ELF section header to the specified output stream 974 //---------------------------------------------------------------------- 975 void 976 ObjectFilePECOFF::DumpSectionHeader(Stream *s, const section_header_t& sh) 977 { 978 std::string name; 979 GetSectionName(name, sh); 980 s->Printf ("%-16s 0x%8.8x 0x%8.8x 0x%8.8x 0x%8.8x 0x%8.8x 0x%8.8x 0x%4.4x 0x%4.4x 0x%8.8x\n", 981 name.c_str(), 982 sh.vmaddr, 983 sh.vmsize, 984 sh.offset, 985 sh.size, 986 sh.reloff, 987 sh.lineoff, 988 sh.nreloc, 989 sh.nline, 990 sh.flags); 991 } 992 993 994 //---------------------------------------------------------------------- 995 // DumpSectionHeaders 996 // 997 // Dump all of the ELF section header to the specified output stream 998 //---------------------------------------------------------------------- 999 void 1000 ObjectFilePECOFF::DumpSectionHeaders(Stream *s) 1001 { 1002 1003 s->PutCString ("Section Headers\n"); 1004 s->PutCString ("IDX name vm addr vm size file off file size reloc off line off nreloc nline flags\n"); 1005 s->PutCString ("==== ---------------- ---------- ---------- ---------- ---------- ---------- ---------- ------ ------ ----------\n"); 1006 1007 uint32_t idx = 0; 1008 SectionHeaderCollIter pos, end = m_sect_headers.end(); 1009 1010 for (pos = m_sect_headers.begin(); pos != end; ++pos, ++idx) 1011 { 1012 s->Printf ("[%2u] ", idx); 1013 ObjectFilePECOFF::DumpSectionHeader(s, *pos); 1014 } 1015 } 1016 1017 bool 1018 ObjectFilePECOFF::GetArchitecture (ArchSpec &arch) 1019 { 1020 uint16_t machine = m_coff_header.machine; 1021 switch (machine) 1022 { 1023 case llvm::COFF::IMAGE_FILE_MACHINE_AMD64: 1024 case llvm::COFF::IMAGE_FILE_MACHINE_I386: 1025 case llvm::COFF::IMAGE_FILE_MACHINE_POWERPC: 1026 case llvm::COFF::IMAGE_FILE_MACHINE_POWERPCFP: 1027 case llvm::COFF::IMAGE_FILE_MACHINE_ARM: 1028 case llvm::COFF::IMAGE_FILE_MACHINE_ARMNT: 1029 case llvm::COFF::IMAGE_FILE_MACHINE_THUMB: 1030 arch.SetArchitecture (eArchTypeCOFF, machine, LLDB_INVALID_CPUTYPE); 1031 return true; 1032 default: 1033 break; 1034 } 1035 return false; 1036 } 1037 1038 ObjectFile::Type 1039 ObjectFilePECOFF::CalculateType() 1040 { 1041 if (m_coff_header.machine != 0) 1042 { 1043 if ((m_coff_header.flags & llvm::COFF::IMAGE_FILE_DLL) == 0) 1044 return eTypeExecutable; 1045 else 1046 return eTypeSharedLibrary; 1047 } 1048 return eTypeExecutable; 1049 } 1050 1051 ObjectFile::Strata 1052 ObjectFilePECOFF::CalculateStrata() 1053 { 1054 return eStrataUser; 1055 } 1056 //------------------------------------------------------------------ 1057 // PluginInterface protocol 1058 //------------------------------------------------------------------ 1059 ConstString 1060 ObjectFilePECOFF::GetPluginName() 1061 { 1062 return GetPluginNameStatic(); 1063 } 1064 1065 uint32_t 1066 ObjectFilePECOFF::GetPluginVersion() 1067 { 1068 return 1; 1069 } 1070 1071