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