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 m_entry_point_address () 197 { 198 ::memset (&m_dos_header, 0, sizeof(m_dos_header)); 199 ::memset (&m_coff_header, 0, sizeof(m_coff_header)); 200 ::memset (&m_coff_header_opt, 0, sizeof(m_coff_header_opt)); 201 } 202 203 204 ObjectFilePECOFF::~ObjectFilePECOFF() 205 { 206 } 207 208 209 bool 210 ObjectFilePECOFF::ParseHeader () 211 { 212 ModuleSP module_sp(GetModule()); 213 if (module_sp) 214 { 215 lldb_private::Mutex::Locker locker(module_sp->GetMutex()); 216 m_sect_headers.clear(); 217 m_data.SetByteOrder (eByteOrderLittle); 218 lldb::offset_t offset = 0; 219 220 if (ParseDOSHeader(m_data, m_dos_header)) 221 { 222 offset = m_dos_header.e_lfanew; 223 uint32_t pe_signature = m_data.GetU32 (&offset); 224 if (pe_signature != IMAGE_NT_SIGNATURE) 225 return false; 226 if (ParseCOFFHeader(m_data, &offset, m_coff_header)) 227 { 228 if (m_coff_header.hdrsize > 0) 229 ParseCOFFOptionalHeader(&offset); 230 ParseSectionHeaders (offset); 231 } 232 return true; 233 } 234 } 235 return false; 236 } 237 238 bool 239 ObjectFilePECOFF::SetLoadAddress(Target &target, addr_t value, bool value_is_offset) 240 { 241 bool changed = false; 242 ModuleSP module_sp = GetModule(); 243 if (module_sp) 244 { 245 size_t num_loaded_sections = 0; 246 SectionList *section_list = GetSectionList (); 247 if (section_list) 248 { 249 if (!value_is_offset) 250 { 251 value -= m_image_base; 252 } 253 254 const size_t num_sections = section_list->GetSize(); 255 size_t sect_idx = 0; 256 257 for (sect_idx = 0; sect_idx < num_sections; ++sect_idx) 258 { 259 // Iterate through the object file sections to find all 260 // of the sections that have SHF_ALLOC in their flag bits. 261 SectionSP section_sp (section_list->GetSectionAtIndex (sect_idx)); 262 if (section_sp && !section_sp->IsThreadSpecific()) 263 { 264 if (target.GetSectionLoadList().SetSectionLoadAddress (section_sp, section_sp->GetFileAddress() + value)) 265 ++num_loaded_sections; 266 } 267 } 268 changed = num_loaded_sections > 0; 269 } 270 } 271 return changed; 272 } 273 274 275 ByteOrder 276 ObjectFilePECOFF::GetByteOrder () const 277 { 278 return eByteOrderLittle; 279 } 280 281 bool 282 ObjectFilePECOFF::IsExecutable() const 283 { 284 return (m_coff_header.flags & llvm::COFF::IMAGE_FILE_DLL) == 0; 285 } 286 287 uint32_t 288 ObjectFilePECOFF::GetAddressByteSize () const 289 { 290 if (m_coff_header_opt.magic == OPT_HEADER_MAGIC_PE32_PLUS) 291 return 8; 292 else if (m_coff_header_opt.magic == OPT_HEADER_MAGIC_PE32) 293 return 4; 294 return 4; 295 } 296 297 //---------------------------------------------------------------------- 298 // NeedsEndianSwap 299 // 300 // Return true if an endian swap needs to occur when extracting data 301 // from this file. 302 //---------------------------------------------------------------------- 303 bool 304 ObjectFilePECOFF::NeedsEndianSwap() const 305 { 306 #if defined(__LITTLE_ENDIAN__) 307 return false; 308 #else 309 return true; 310 #endif 311 } 312 //---------------------------------------------------------------------- 313 // ParseDOSHeader 314 //---------------------------------------------------------------------- 315 bool 316 ObjectFilePECOFF::ParseDOSHeader (DataExtractor &data, dos_header_t &dos_header) 317 { 318 bool success = false; 319 lldb::offset_t offset = 0; 320 success = data.ValidOffsetForDataOfSize(0, sizeof(dos_header)); 321 322 if (success) 323 { 324 dos_header.e_magic = data.GetU16(&offset); // Magic number 325 success = dos_header.e_magic == IMAGE_DOS_SIGNATURE; 326 327 if (success) 328 { 329 dos_header.e_cblp = data.GetU16(&offset); // Bytes on last page of file 330 dos_header.e_cp = data.GetU16(&offset); // Pages in file 331 dos_header.e_crlc = data.GetU16(&offset); // Relocations 332 dos_header.e_cparhdr = data.GetU16(&offset); // Size of header in paragraphs 333 dos_header.e_minalloc = data.GetU16(&offset); // Minimum extra paragraphs needed 334 dos_header.e_maxalloc = data.GetU16(&offset); // Maximum extra paragraphs needed 335 dos_header.e_ss = data.GetU16(&offset); // Initial (relative) SS value 336 dos_header.e_sp = data.GetU16(&offset); // Initial SP value 337 dos_header.e_csum = data.GetU16(&offset); // Checksum 338 dos_header.e_ip = data.GetU16(&offset); // Initial IP value 339 dos_header.e_cs = data.GetU16(&offset); // Initial (relative) CS value 340 dos_header.e_lfarlc = data.GetU16(&offset); // File address of relocation table 341 dos_header.e_ovno = data.GetU16(&offset); // Overlay number 342 343 dos_header.e_res[0] = data.GetU16(&offset); // Reserved words 344 dos_header.e_res[1] = data.GetU16(&offset); // Reserved words 345 dos_header.e_res[2] = data.GetU16(&offset); // Reserved words 346 dos_header.e_res[3] = data.GetU16(&offset); // Reserved words 347 348 dos_header.e_oemid = data.GetU16(&offset); // OEM identifier (for e_oeminfo) 349 dos_header.e_oeminfo = data.GetU16(&offset); // OEM information; e_oemid specific 350 dos_header.e_res2[0] = data.GetU16(&offset); // Reserved words 351 dos_header.e_res2[1] = data.GetU16(&offset); // Reserved words 352 dos_header.e_res2[2] = data.GetU16(&offset); // Reserved words 353 dos_header.e_res2[3] = data.GetU16(&offset); // Reserved words 354 dos_header.e_res2[4] = data.GetU16(&offset); // Reserved words 355 dos_header.e_res2[5] = data.GetU16(&offset); // Reserved words 356 dos_header.e_res2[6] = data.GetU16(&offset); // Reserved words 357 dos_header.e_res2[7] = data.GetU16(&offset); // Reserved words 358 dos_header.e_res2[8] = data.GetU16(&offset); // Reserved words 359 dos_header.e_res2[9] = data.GetU16(&offset); // Reserved words 360 361 dos_header.e_lfanew = data.GetU32(&offset); // File address of new exe header 362 } 363 } 364 if (!success) 365 memset(&dos_header, 0, sizeof(dos_header)); 366 return success; 367 } 368 369 370 //---------------------------------------------------------------------- 371 // ParserCOFFHeader 372 //---------------------------------------------------------------------- 373 bool 374 ObjectFilePECOFF::ParseCOFFHeader(DataExtractor &data, lldb::offset_t *offset_ptr, coff_header_t &coff_header) 375 { 376 bool success = data.ValidOffsetForDataOfSize (*offset_ptr, sizeof(coff_header)); 377 if (success) 378 { 379 coff_header.machine = data.GetU16(offset_ptr); 380 coff_header.nsects = data.GetU16(offset_ptr); 381 coff_header.modtime = data.GetU32(offset_ptr); 382 coff_header.symoff = data.GetU32(offset_ptr); 383 coff_header.nsyms = data.GetU32(offset_ptr); 384 coff_header.hdrsize = data.GetU16(offset_ptr); 385 coff_header.flags = data.GetU16(offset_ptr); 386 } 387 if (!success) 388 memset(&coff_header, 0, sizeof(coff_header)); 389 return success; 390 } 391 392 bool 393 ObjectFilePECOFF::ParseCOFFOptionalHeader(lldb::offset_t *offset_ptr) 394 { 395 bool success = false; 396 const lldb::offset_t end_offset = *offset_ptr + m_coff_header.hdrsize; 397 if (*offset_ptr < end_offset) 398 { 399 success = true; 400 m_coff_header_opt.magic = m_data.GetU16(offset_ptr); 401 m_coff_header_opt.major_linker_version = m_data.GetU8 (offset_ptr); 402 m_coff_header_opt.minor_linker_version = m_data.GetU8 (offset_ptr); 403 m_coff_header_opt.code_size = m_data.GetU32(offset_ptr); 404 m_coff_header_opt.data_size = m_data.GetU32(offset_ptr); 405 m_coff_header_opt.bss_size = m_data.GetU32(offset_ptr); 406 m_coff_header_opt.entry = m_data.GetU32(offset_ptr); 407 m_coff_header_opt.code_offset = m_data.GetU32(offset_ptr); 408 409 const uint32_t addr_byte_size = GetAddressByteSize (); 410 411 if (*offset_ptr < end_offset) 412 { 413 if (m_coff_header_opt.magic == OPT_HEADER_MAGIC_PE32) 414 { 415 // PE32 only 416 m_coff_header_opt.data_offset = m_data.GetU32(offset_ptr); 417 } 418 else 419 m_coff_header_opt.data_offset = 0; 420 421 if (*offset_ptr < end_offset) 422 { 423 m_coff_header_opt.image_base = m_data.GetMaxU64 (offset_ptr, addr_byte_size); 424 m_coff_header_opt.sect_alignment = m_data.GetU32(offset_ptr); 425 m_coff_header_opt.file_alignment = m_data.GetU32(offset_ptr); 426 m_coff_header_opt.major_os_system_version = m_data.GetU16(offset_ptr); 427 m_coff_header_opt.minor_os_system_version = m_data.GetU16(offset_ptr); 428 m_coff_header_opt.major_image_version = m_data.GetU16(offset_ptr); 429 m_coff_header_opt.minor_image_version = m_data.GetU16(offset_ptr); 430 m_coff_header_opt.major_subsystem_version = m_data.GetU16(offset_ptr); 431 m_coff_header_opt.minor_subsystem_version = m_data.GetU16(offset_ptr); 432 m_coff_header_opt.reserved1 = m_data.GetU32(offset_ptr); 433 m_coff_header_opt.image_size = m_data.GetU32(offset_ptr); 434 m_coff_header_opt.header_size = m_data.GetU32(offset_ptr); 435 m_coff_header_opt.checksum = m_data.GetU32(offset_ptr); 436 m_coff_header_opt.subsystem = m_data.GetU16(offset_ptr); 437 m_coff_header_opt.dll_flags = m_data.GetU16(offset_ptr); 438 m_coff_header_opt.stack_reserve_size = m_data.GetMaxU64 (offset_ptr, addr_byte_size); 439 m_coff_header_opt.stack_commit_size = m_data.GetMaxU64 (offset_ptr, addr_byte_size); 440 m_coff_header_opt.heap_reserve_size = m_data.GetMaxU64 (offset_ptr, addr_byte_size); 441 m_coff_header_opt.heap_commit_size = m_data.GetMaxU64 (offset_ptr, addr_byte_size); 442 m_coff_header_opt.loader_flags = m_data.GetU32(offset_ptr); 443 uint32_t num_data_dir_entries = m_data.GetU32(offset_ptr); 444 m_coff_header_opt.data_dirs.clear(); 445 m_coff_header_opt.data_dirs.resize(num_data_dir_entries); 446 uint32_t i; 447 for (i=0; i<num_data_dir_entries; i++) 448 { 449 m_coff_header_opt.data_dirs[i].vmaddr = m_data.GetU32(offset_ptr); 450 m_coff_header_opt.data_dirs[i].vmsize = m_data.GetU32(offset_ptr); 451 } 452 453 m_file_offset = m_coff_header_opt.image_base; 454 m_image_base = m_coff_header_opt.image_base; 455 } 456 } 457 } 458 // Make sure we are on track for section data which follows 459 *offset_ptr = end_offset; 460 return success; 461 } 462 463 464 //---------------------------------------------------------------------- 465 // ParseSectionHeaders 466 //---------------------------------------------------------------------- 467 bool 468 ObjectFilePECOFF::ParseSectionHeaders (uint32_t section_header_data_offset) 469 { 470 const uint32_t nsects = m_coff_header.nsects; 471 m_sect_headers.clear(); 472 473 if (nsects > 0) 474 { 475 const uint32_t addr_byte_size = GetAddressByteSize (); 476 const size_t section_header_byte_size = nsects * sizeof(section_header_t); 477 DataBufferSP section_header_data_sp(m_file.ReadFileContents (section_header_data_offset, section_header_byte_size)); 478 DataExtractor section_header_data (section_header_data_sp, GetByteOrder(), addr_byte_size); 479 480 lldb::offset_t offset = 0; 481 if (section_header_data.ValidOffsetForDataOfSize (offset, section_header_byte_size)) 482 { 483 m_sect_headers.resize(nsects); 484 485 for (uint32_t idx = 0; idx<nsects; ++idx) 486 { 487 const void *name_data = section_header_data.GetData(&offset, 8); 488 if (name_data) 489 { 490 memcpy(m_sect_headers[idx].name, name_data, 8); 491 m_sect_headers[idx].vmsize = section_header_data.GetU32(&offset); 492 m_sect_headers[idx].vmaddr = section_header_data.GetU32(&offset); 493 m_sect_headers[idx].size = section_header_data.GetU32(&offset); 494 m_sect_headers[idx].offset = section_header_data.GetU32(&offset); 495 m_sect_headers[idx].reloff = section_header_data.GetU32(&offset); 496 m_sect_headers[idx].lineoff = section_header_data.GetU32(&offset); 497 m_sect_headers[idx].nreloc = section_header_data.GetU16(&offset); 498 m_sect_headers[idx].nline = section_header_data.GetU16(&offset); 499 m_sect_headers[idx].flags = section_header_data.GetU32(&offset); 500 } 501 } 502 } 503 } 504 505 return m_sect_headers.empty() == false; 506 } 507 508 bool 509 ObjectFilePECOFF::GetSectionName(std::string& sect_name, const section_header_t& sect) 510 { 511 if (sect.name[0] == '/') 512 { 513 lldb::offset_t stroff = strtoul(§.name[1], NULL, 10); 514 lldb::offset_t string_file_offset = m_coff_header.symoff + (m_coff_header.nsyms * 18) + stroff; 515 const char *name = m_data.GetCStr (&string_file_offset); 516 if (name) 517 { 518 sect_name = name; 519 return true; 520 } 521 522 return false; 523 } 524 sect_name = sect.name; 525 return true; 526 } 527 528 //---------------------------------------------------------------------- 529 // GetNListSymtab 530 //---------------------------------------------------------------------- 531 Symtab * 532 ObjectFilePECOFF::GetSymtab() 533 { 534 ModuleSP module_sp(GetModule()); 535 if (module_sp) 536 { 537 lldb_private::Mutex::Locker locker(module_sp->GetMutex()); 538 if (m_symtab_ap.get() == NULL) 539 { 540 SectionList *sect_list = GetSectionList(); 541 m_symtab_ap.reset(new Symtab(this)); 542 Mutex::Locker symtab_locker (m_symtab_ap->GetMutex()); 543 544 const uint32_t num_syms = m_coff_header.nsyms; 545 546 if (num_syms > 0 && m_coff_header.symoff > 0) 547 { 548 const uint32_t symbol_size = 18; 549 const uint32_t addr_byte_size = GetAddressByteSize (); 550 const size_t symbol_data_size = num_syms * symbol_size; 551 // Include the 4-byte string table size at the end of the symbols 552 DataBufferSP symtab_data_sp(m_file.ReadFileContents (m_coff_header.symoff, symbol_data_size + 4)); 553 DataExtractor symtab_data (symtab_data_sp, GetByteOrder(), addr_byte_size); 554 lldb::offset_t offset = symbol_data_size; 555 const uint32_t strtab_size = symtab_data.GetU32 (&offset); 556 DataBufferSP strtab_data_sp(m_file.ReadFileContents (m_coff_header.symoff + symbol_data_size, strtab_size)); 557 DataExtractor strtab_data (strtab_data_sp, GetByteOrder(), addr_byte_size); 558 559 // First 4 bytes should be zeroed after strtab_size has been read, 560 // because it is used as offset 0 to encode a NULL string. 561 uint32_t* strtab_data_start = (uint32_t*)strtab_data_sp->GetBytes(); 562 strtab_data_start[0] = 0; 563 564 offset = 0; 565 std::string symbol_name; 566 Symbol *symbols = m_symtab_ap->Resize (num_syms); 567 for (uint32_t i=0; i<num_syms; ++i) 568 { 569 coff_symbol_t symbol; 570 const uint32_t symbol_offset = offset; 571 const char *symbol_name_cstr = NULL; 572 // If the first 4 bytes of the symbol string are zero, then they 573 // are followed by a 4-byte string table offset. Else these 574 // 8 bytes contain the symbol name 575 if (symtab_data.GetU32 (&offset) == 0) 576 { 577 // Long string that doesn't fit into the symbol table name, 578 // so now we must read the 4 byte string table offset 579 uint32_t strtab_offset = symtab_data.GetU32 (&offset); 580 symbol_name_cstr = strtab_data.PeekCStr (strtab_offset); 581 symbol_name.assign (symbol_name_cstr); 582 } 583 else 584 { 585 // Short string that fits into the symbol table name which is 8 bytes 586 offset += sizeof(symbol.name) - 4; // Skip remaining 587 symbol_name_cstr = symtab_data.PeekCStr (symbol_offset); 588 if (symbol_name_cstr == NULL) 589 break; 590 symbol_name.assign (symbol_name_cstr, sizeof(symbol.name)); 591 } 592 symbol.value = symtab_data.GetU32 (&offset); 593 symbol.sect = symtab_data.GetU16 (&offset); 594 symbol.type = symtab_data.GetU16 (&offset); 595 symbol.storage = symtab_data.GetU8 (&offset); 596 symbol.naux = symtab_data.GetU8 (&offset); 597 symbols[i].GetMangled ().SetValue (ConstString(symbol_name.c_str())); 598 if ((int16_t)symbol.sect >= 1) 599 { 600 Address symbol_addr(sect_list->GetSectionAtIndex(symbol.sect-1), symbol.value); 601 symbols[i].GetAddressRef() = symbol_addr; 602 symbols[i].SetType(MapSymbolType(symbol.type)); 603 } 604 605 if (symbol.naux > 0) 606 { 607 i += symbol.naux; 608 offset += symbol_size; 609 } 610 } 611 612 } 613 614 // Read export header 615 if (coff_data_dir_export_table < m_coff_header_opt.data_dirs.size() 616 && 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) 617 { 618 export_directory_entry export_table; 619 uint32_t data_start = m_coff_header_opt.data_dirs[coff_data_dir_export_table].vmaddr; 620 Address address(m_coff_header_opt.image_base + data_start, sect_list); 621 DataBufferSP symtab_data_sp(m_file.ReadFileContents(address.GetSection()->GetFileOffset() + address.GetOffset(), m_coff_header_opt.data_dirs[0].vmsize)); 622 DataExtractor symtab_data (symtab_data_sp, GetByteOrder(), GetAddressByteSize()); 623 lldb::offset_t offset = 0; 624 625 // Read export_table header 626 export_table.characteristics = symtab_data.GetU32(&offset); 627 export_table.time_date_stamp = symtab_data.GetU32(&offset); 628 export_table.major_version = symtab_data.GetU16(&offset); 629 export_table.minor_version = symtab_data.GetU16(&offset); 630 export_table.name = symtab_data.GetU32(&offset); 631 export_table.base = symtab_data.GetU32(&offset); 632 export_table.number_of_functions = symtab_data.GetU32(&offset); 633 export_table.number_of_names = symtab_data.GetU32(&offset); 634 export_table.address_of_functions = symtab_data.GetU32(&offset); 635 export_table.address_of_names = symtab_data.GetU32(&offset); 636 export_table.address_of_name_ordinals = symtab_data.GetU32(&offset); 637 638 bool has_ordinal = export_table.address_of_name_ordinals != 0; 639 640 lldb::offset_t name_offset = export_table.address_of_names - data_start; 641 lldb::offset_t name_ordinal_offset = export_table.address_of_name_ordinals - data_start; 642 643 Symbol *symbols = m_symtab_ap->Resize(export_table.number_of_names); 644 645 std::string symbol_name; 646 647 // Read each export table entry 648 for (size_t i = 0; i < export_table.number_of_names; ++i) 649 { 650 uint32_t name_ordinal = has_ordinal ? symtab_data.GetU16(&name_ordinal_offset) : i; 651 uint32_t name_address = symtab_data.GetU32(&name_offset); 652 653 const char* symbol_name_cstr = symtab_data.PeekCStr(name_address - data_start); 654 symbol_name.assign(symbol_name_cstr); 655 656 lldb::offset_t function_offset = export_table.address_of_functions - data_start + sizeof(uint32_t) * name_ordinal; 657 uint32_t function_rva = symtab_data.GetU32(&function_offset); 658 659 Address symbol_addr(m_coff_header_opt.image_base + function_rva, sect_list); 660 symbols[i].GetMangled().SetValue(ConstString(symbol_name.c_str())); 661 symbols[i].GetAddressRef() = symbol_addr; 662 symbols[i].SetType(lldb::eSymbolTypeCode); 663 symbols[i].SetDebug(true); 664 } 665 } 666 m_symtab_ap->CalculateSymbolSizes(); 667 } 668 } 669 return m_symtab_ap.get(); 670 671 } 672 673 bool 674 ObjectFilePECOFF::IsStripped () 675 { 676 // TODO: determine this for COFF 677 return false; 678 } 679 680 681 682 void 683 ObjectFilePECOFF::CreateSections (SectionList &unified_section_list) 684 { 685 if (!m_sections_ap.get()) 686 { 687 m_sections_ap.reset(new SectionList()); 688 689 ModuleSP module_sp(GetModule()); 690 if (module_sp) 691 { 692 lldb_private::Mutex::Locker locker(module_sp->GetMutex()); 693 const uint32_t nsects = m_sect_headers.size(); 694 ModuleSP module_sp (GetModule()); 695 for (uint32_t idx = 0; idx<nsects; ++idx) 696 { 697 std::string sect_name; 698 GetSectionName (sect_name, m_sect_headers[idx]); 699 ConstString const_sect_name (sect_name.c_str()); 700 static ConstString g_code_sect_name (".code"); 701 static ConstString g_CODE_sect_name ("CODE"); 702 static ConstString g_data_sect_name (".data"); 703 static ConstString g_DATA_sect_name ("DATA"); 704 static ConstString g_bss_sect_name (".bss"); 705 static ConstString g_BSS_sect_name ("BSS"); 706 static ConstString g_debug_sect_name (".debug"); 707 static ConstString g_reloc_sect_name (".reloc"); 708 static ConstString g_stab_sect_name (".stab"); 709 static ConstString g_stabstr_sect_name (".stabstr"); 710 static ConstString g_sect_name_dwarf_debug_abbrev (".debug_abbrev"); 711 static ConstString g_sect_name_dwarf_debug_aranges (".debug_aranges"); 712 static ConstString g_sect_name_dwarf_debug_frame (".debug_frame"); 713 static ConstString g_sect_name_dwarf_debug_info (".debug_info"); 714 static ConstString g_sect_name_dwarf_debug_line (".debug_line"); 715 static ConstString g_sect_name_dwarf_debug_loc (".debug_loc"); 716 static ConstString g_sect_name_dwarf_debug_macinfo (".debug_macinfo"); 717 static ConstString g_sect_name_dwarf_debug_pubnames (".debug_pubnames"); 718 static ConstString g_sect_name_dwarf_debug_pubtypes (".debug_pubtypes"); 719 static ConstString g_sect_name_dwarf_debug_ranges (".debug_ranges"); 720 static ConstString g_sect_name_dwarf_debug_str (".debug_str"); 721 static ConstString g_sect_name_eh_frame (".eh_frame"); 722 static ConstString g_sect_name_go_symtab (".gosymtab"); 723 SectionType section_type = eSectionTypeOther; 724 if (m_sect_headers[idx].flags & llvm::COFF::IMAGE_SCN_CNT_CODE && 725 ((const_sect_name == g_code_sect_name) || (const_sect_name == g_CODE_sect_name))) 726 { 727 section_type = eSectionTypeCode; 728 } 729 else if (m_sect_headers[idx].flags & llvm::COFF::IMAGE_SCN_CNT_INITIALIZED_DATA && 730 ((const_sect_name == g_data_sect_name) || (const_sect_name == g_DATA_sect_name))) 731 { 732 section_type = eSectionTypeData; 733 } 734 else if (m_sect_headers[idx].flags & llvm::COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA && 735 ((const_sect_name == g_bss_sect_name) || (const_sect_name == g_BSS_sect_name))) 736 { 737 if (m_sect_headers[idx].size == 0) 738 section_type = eSectionTypeZeroFill; 739 else 740 section_type = eSectionTypeData; 741 } 742 else if (const_sect_name == g_debug_sect_name) 743 { 744 section_type = eSectionTypeDebug; 745 } 746 else if (const_sect_name == g_stabstr_sect_name) 747 { 748 section_type = eSectionTypeDataCString; 749 } 750 else if (const_sect_name == g_reloc_sect_name) 751 { 752 section_type = eSectionTypeOther; 753 } 754 else if (const_sect_name == g_sect_name_dwarf_debug_abbrev) section_type = eSectionTypeDWARFDebugAbbrev; 755 else if (const_sect_name == g_sect_name_dwarf_debug_aranges) section_type = eSectionTypeDWARFDebugAranges; 756 else if (const_sect_name == g_sect_name_dwarf_debug_frame) section_type = eSectionTypeDWARFDebugFrame; 757 else if (const_sect_name == g_sect_name_dwarf_debug_info) section_type = eSectionTypeDWARFDebugInfo; 758 else if (const_sect_name == g_sect_name_dwarf_debug_line) section_type = eSectionTypeDWARFDebugLine; 759 else if (const_sect_name == g_sect_name_dwarf_debug_loc) section_type = eSectionTypeDWARFDebugLoc; 760 else if (const_sect_name == g_sect_name_dwarf_debug_macinfo) section_type = eSectionTypeDWARFDebugMacInfo; 761 else if (const_sect_name == g_sect_name_dwarf_debug_pubnames) section_type = eSectionTypeDWARFDebugPubNames; 762 else if (const_sect_name == g_sect_name_dwarf_debug_pubtypes) section_type = eSectionTypeDWARFDebugPubTypes; 763 else if (const_sect_name == g_sect_name_dwarf_debug_ranges) section_type = eSectionTypeDWARFDebugRanges; 764 else if (const_sect_name == g_sect_name_dwarf_debug_str) section_type = eSectionTypeDWARFDebugStr; 765 else if (const_sect_name == g_sect_name_eh_frame) section_type = eSectionTypeEHFrame; 766 else if (const_sect_name == g_sect_name_go_symtab) section_type = eSectionTypeGoSymtab; 767 else if (m_sect_headers[idx].flags & llvm::COFF::IMAGE_SCN_CNT_CODE) 768 { 769 section_type = eSectionTypeCode; 770 } 771 else if (m_sect_headers[idx].flags & llvm::COFF::IMAGE_SCN_CNT_INITIALIZED_DATA) 772 { 773 section_type = eSectionTypeData; 774 } 775 else if (m_sect_headers[idx].flags & llvm::COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA) 776 { 777 if (m_sect_headers[idx].size == 0) 778 section_type = eSectionTypeZeroFill; 779 else 780 section_type = eSectionTypeData; 781 } 782 783 // Use a segment ID of the segment index shifted left by 8 so they 784 // never conflict with any of the sections. 785 SectionSP section_sp (new Section (module_sp, // Module to which this section belongs 786 this, // Object file to which this section belongs 787 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 788 const_sect_name, // Name of this section 789 section_type, // This section is a container of other sections. 790 m_coff_header_opt.image_base + m_sect_headers[idx].vmaddr, // File VM address == addresses as they are found in the object file 791 m_sect_headers[idx].vmsize, // VM size in bytes of this section 792 m_sect_headers[idx].offset, // Offset to the data for this section in the file 793 m_sect_headers[idx].size, // Size in bytes of this section as found in the file 794 m_coff_header_opt.sect_alignment, // Section alignment 795 m_sect_headers[idx].flags)); // Flags for this section 796 797 //section_sp->SetIsEncrypted (segment_is_encrypted); 798 799 unified_section_list.AddSection(section_sp); 800 m_sections_ap->AddSection (section_sp); 801 } 802 } 803 } 804 } 805 806 bool 807 ObjectFilePECOFF::GetUUID (UUID* uuid) 808 { 809 return false; 810 } 811 812 uint32_t 813 ObjectFilePECOFF::GetDependentModules (FileSpecList& files) 814 { 815 return 0; 816 } 817 818 lldb_private::Address 819 ObjectFilePECOFF::GetEntryPointAddress () 820 { 821 if (m_entry_point_address.IsValid()) 822 return m_entry_point_address; 823 824 if (!ParseHeader() || !IsExecutable()) 825 return m_entry_point_address; 826 827 SectionList *section_list = GetSectionList(); 828 addr_t offset = m_coff_header_opt.entry; 829 830 if (!section_list) 831 m_entry_point_address.SetOffset(offset); 832 else 833 m_entry_point_address.ResolveAddressUsingFileSections(offset, section_list); 834 return m_entry_point_address; 835 } 836 837 838 //---------------------------------------------------------------------- 839 // Dump 840 // 841 // Dump the specifics of the runtime file container (such as any headers 842 // segments, sections, etc). 843 //---------------------------------------------------------------------- 844 void 845 ObjectFilePECOFF::Dump(Stream *s) 846 { 847 ModuleSP module_sp(GetModule()); 848 if (module_sp) 849 { 850 lldb_private::Mutex::Locker locker(module_sp->GetMutex()); 851 s->Printf("%p: ", static_cast<void*>(this)); 852 s->Indent(); 853 s->PutCString("ObjectFilePECOFF"); 854 855 ArchSpec header_arch; 856 GetArchitecture (header_arch); 857 858 *s << ", file = '" << m_file << "', arch = " << header_arch.GetArchitectureName() << "\n"; 859 860 SectionList *sections = GetSectionList(); 861 if (sections) 862 sections->Dump(s, NULL, true, UINT32_MAX); 863 864 if (m_symtab_ap.get()) 865 m_symtab_ap->Dump(s, NULL, eSortOrderNone); 866 867 if (m_dos_header.e_magic) 868 DumpDOSHeader (s, m_dos_header); 869 if (m_coff_header.machine) 870 { 871 DumpCOFFHeader (s, m_coff_header); 872 if (m_coff_header.hdrsize) 873 DumpOptCOFFHeader (s, m_coff_header_opt); 874 } 875 s->EOL(); 876 DumpSectionHeaders(s); 877 s->EOL(); 878 } 879 } 880 881 //---------------------------------------------------------------------- 882 // DumpDOSHeader 883 // 884 // Dump the MS-DOS header to the specified output stream 885 //---------------------------------------------------------------------- 886 void 887 ObjectFilePECOFF::DumpDOSHeader(Stream *s, const dos_header_t& header) 888 { 889 s->PutCString ("MSDOS Header\n"); 890 s->Printf (" e_magic = 0x%4.4x\n", header.e_magic); 891 s->Printf (" e_cblp = 0x%4.4x\n", header.e_cblp); 892 s->Printf (" e_cp = 0x%4.4x\n", header.e_cp); 893 s->Printf (" e_crlc = 0x%4.4x\n", header.e_crlc); 894 s->Printf (" e_cparhdr = 0x%4.4x\n", header.e_cparhdr); 895 s->Printf (" e_minalloc = 0x%4.4x\n", header.e_minalloc); 896 s->Printf (" e_maxalloc = 0x%4.4x\n", header.e_maxalloc); 897 s->Printf (" e_ss = 0x%4.4x\n", header.e_ss); 898 s->Printf (" e_sp = 0x%4.4x\n", header.e_sp); 899 s->Printf (" e_csum = 0x%4.4x\n", header.e_csum); 900 s->Printf (" e_ip = 0x%4.4x\n", header.e_ip); 901 s->Printf (" e_cs = 0x%4.4x\n", header.e_cs); 902 s->Printf (" e_lfarlc = 0x%4.4x\n", header.e_lfarlc); 903 s->Printf (" e_ovno = 0x%4.4x\n", header.e_ovno); 904 s->Printf (" e_res[4] = { 0x%4.4x, 0x%4.4x, 0x%4.4x, 0x%4.4x }\n", 905 header.e_res[0], 906 header.e_res[1], 907 header.e_res[2], 908 header.e_res[3]); 909 s->Printf (" e_oemid = 0x%4.4x\n", header.e_oemid); 910 s->Printf (" e_oeminfo = 0x%4.4x\n", header.e_oeminfo); 911 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", 912 header.e_res2[0], 913 header.e_res2[1], 914 header.e_res2[2], 915 header.e_res2[3], 916 header.e_res2[4], 917 header.e_res2[5], 918 header.e_res2[6], 919 header.e_res2[7], 920 header.e_res2[8], 921 header.e_res2[9]); 922 s->Printf (" e_lfanew = 0x%8.8x\n", header.e_lfanew); 923 } 924 925 //---------------------------------------------------------------------- 926 // DumpCOFFHeader 927 // 928 // Dump the COFF header to the specified output stream 929 //---------------------------------------------------------------------- 930 void 931 ObjectFilePECOFF::DumpCOFFHeader(Stream *s, const coff_header_t& header) 932 { 933 s->PutCString ("COFF Header\n"); 934 s->Printf (" machine = 0x%4.4x\n", header.machine); 935 s->Printf (" nsects = 0x%4.4x\n", header.nsects); 936 s->Printf (" modtime = 0x%8.8x\n", header.modtime); 937 s->Printf (" symoff = 0x%8.8x\n", header.symoff); 938 s->Printf (" nsyms = 0x%8.8x\n", header.nsyms); 939 s->Printf (" hdrsize = 0x%4.4x\n", header.hdrsize); 940 } 941 942 //---------------------------------------------------------------------- 943 // DumpOptCOFFHeader 944 // 945 // Dump the optional COFF header to the specified output stream 946 //---------------------------------------------------------------------- 947 void 948 ObjectFilePECOFF::DumpOptCOFFHeader(Stream *s, const coff_opt_header_t& header) 949 { 950 s->PutCString ("Optional COFF Header\n"); 951 s->Printf (" magic = 0x%4.4x\n", header.magic); 952 s->Printf (" major_linker_version = 0x%2.2x\n", header.major_linker_version); 953 s->Printf (" minor_linker_version = 0x%2.2x\n", header.minor_linker_version); 954 s->Printf (" code_size = 0x%8.8x\n", header.code_size); 955 s->Printf (" data_size = 0x%8.8x\n", header.data_size); 956 s->Printf (" bss_size = 0x%8.8x\n", header.bss_size); 957 s->Printf (" entry = 0x%8.8x\n", header.entry); 958 s->Printf (" code_offset = 0x%8.8x\n", header.code_offset); 959 s->Printf (" data_offset = 0x%8.8x\n", header.data_offset); 960 s->Printf (" image_base = 0x%16.16" PRIx64 "\n", header.image_base); 961 s->Printf (" sect_alignment = 0x%8.8x\n", header.sect_alignment); 962 s->Printf (" file_alignment = 0x%8.8x\n", header.file_alignment); 963 s->Printf (" major_os_system_version = 0x%4.4x\n", header.major_os_system_version); 964 s->Printf (" minor_os_system_version = 0x%4.4x\n", header.minor_os_system_version); 965 s->Printf (" major_image_version = 0x%4.4x\n", header.major_image_version); 966 s->Printf (" minor_image_version = 0x%4.4x\n", header.minor_image_version); 967 s->Printf (" major_subsystem_version = 0x%4.4x\n", header.major_subsystem_version); 968 s->Printf (" minor_subsystem_version = 0x%4.4x\n", header.minor_subsystem_version); 969 s->Printf (" reserved1 = 0x%8.8x\n", header.reserved1); 970 s->Printf (" image_size = 0x%8.8x\n", header.image_size); 971 s->Printf (" header_size = 0x%8.8x\n", header.header_size); 972 s->Printf (" checksum = 0x%8.8x\n", header.checksum); 973 s->Printf (" subsystem = 0x%4.4x\n", header.subsystem); 974 s->Printf (" dll_flags = 0x%4.4x\n", header.dll_flags); 975 s->Printf (" stack_reserve_size = 0x%16.16" PRIx64 "\n", header.stack_reserve_size); 976 s->Printf (" stack_commit_size = 0x%16.16" PRIx64 "\n", header.stack_commit_size); 977 s->Printf (" heap_reserve_size = 0x%16.16" PRIx64 "\n", header.heap_reserve_size); 978 s->Printf (" heap_commit_size = 0x%16.16" PRIx64 "\n", header.heap_commit_size); 979 s->Printf (" loader_flags = 0x%8.8x\n", header.loader_flags); 980 s->Printf (" num_data_dir_entries = 0x%8.8x\n", (uint32_t)header.data_dirs.size()); 981 uint32_t i; 982 for (i=0; i<header.data_dirs.size(); i++) 983 { 984 s->Printf (" data_dirs[%2u] vmaddr = 0x%8.8x, vmsize = 0x%8.8x\n", 985 i, 986 header.data_dirs[i].vmaddr, 987 header.data_dirs[i].vmsize); 988 } 989 } 990 //---------------------------------------------------------------------- 991 // DumpSectionHeader 992 // 993 // Dump a single ELF section header to the specified output stream 994 //---------------------------------------------------------------------- 995 void 996 ObjectFilePECOFF::DumpSectionHeader(Stream *s, const section_header_t& sh) 997 { 998 std::string name; 999 GetSectionName(name, sh); 1000 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", 1001 name.c_str(), 1002 sh.vmaddr, 1003 sh.vmsize, 1004 sh.offset, 1005 sh.size, 1006 sh.reloff, 1007 sh.lineoff, 1008 sh.nreloc, 1009 sh.nline, 1010 sh.flags); 1011 } 1012 1013 1014 //---------------------------------------------------------------------- 1015 // DumpSectionHeaders 1016 // 1017 // Dump all of the ELF section header to the specified output stream 1018 //---------------------------------------------------------------------- 1019 void 1020 ObjectFilePECOFF::DumpSectionHeaders(Stream *s) 1021 { 1022 1023 s->PutCString ("Section Headers\n"); 1024 s->PutCString ("IDX name vm addr vm size file off file size reloc off line off nreloc nline flags\n"); 1025 s->PutCString ("==== ---------------- ---------- ---------- ---------- ---------- ---------- ---------- ------ ------ ----------\n"); 1026 1027 uint32_t idx = 0; 1028 SectionHeaderCollIter pos, end = m_sect_headers.end(); 1029 1030 for (pos = m_sect_headers.begin(); pos != end; ++pos, ++idx) 1031 { 1032 s->Printf ("[%2u] ", idx); 1033 ObjectFilePECOFF::DumpSectionHeader(s, *pos); 1034 } 1035 } 1036 1037 bool 1038 ObjectFilePECOFF::GetArchitecture (ArchSpec &arch) 1039 { 1040 uint16_t machine = m_coff_header.machine; 1041 switch (machine) 1042 { 1043 case llvm::COFF::IMAGE_FILE_MACHINE_AMD64: 1044 case llvm::COFF::IMAGE_FILE_MACHINE_I386: 1045 case llvm::COFF::IMAGE_FILE_MACHINE_POWERPC: 1046 case llvm::COFF::IMAGE_FILE_MACHINE_POWERPCFP: 1047 case llvm::COFF::IMAGE_FILE_MACHINE_ARM: 1048 case llvm::COFF::IMAGE_FILE_MACHINE_ARMNT: 1049 case llvm::COFF::IMAGE_FILE_MACHINE_THUMB: 1050 arch.SetArchitecture (eArchTypeCOFF, machine, LLDB_INVALID_CPUTYPE); 1051 return true; 1052 default: 1053 break; 1054 } 1055 return false; 1056 } 1057 1058 ObjectFile::Type 1059 ObjectFilePECOFF::CalculateType() 1060 { 1061 if (m_coff_header.machine != 0) 1062 { 1063 if ((m_coff_header.flags & llvm::COFF::IMAGE_FILE_DLL) == 0) 1064 return eTypeExecutable; 1065 else 1066 return eTypeSharedLibrary; 1067 } 1068 return eTypeExecutable; 1069 } 1070 1071 ObjectFile::Strata 1072 ObjectFilePECOFF::CalculateStrata() 1073 { 1074 return eStrataUser; 1075 } 1076 //------------------------------------------------------------------ 1077 // PluginInterface protocol 1078 //------------------------------------------------------------------ 1079 ConstString 1080 ObjectFilePECOFF::GetPluginName() 1081 { 1082 return GetPluginNameStatic(); 1083 } 1084 1085 uint32_t 1086 ObjectFilePECOFF::GetPluginVersion() 1087 { 1088 return 1; 1089 } 1090 1091