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