1 //===-- ObjectFileELF.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 "ObjectFileELF.h" 11 12 #include <cassert> 13 #include <algorithm> 14 15 #include "lldb/Core/ArchSpec.h" 16 #include "lldb/Core/DataBuffer.h" 17 #include "lldb/Core/Error.h" 18 #include "lldb/Core/FileSpecList.h" 19 #include "lldb/Core/Module.h" 20 #include "lldb/Core/PluginManager.h" 21 #include "lldb/Core/Section.h" 22 #include "lldb/Core/Stream.h" 23 #include "lldb/Symbol/SymbolContext.h" 24 #include "lldb/Host/Host.h" 25 26 #include "llvm/ADT/PointerUnion.h" 27 28 #define CASE_AND_STREAM(s, def, width) \ 29 case def: s->Printf("%-*s", width, #def); break; 30 31 using namespace lldb; 32 using namespace lldb_private; 33 using namespace elf; 34 using namespace llvm::ELF; 35 36 namespace { 37 //===----------------------------------------------------------------------===// 38 /// @class ELFRelocation 39 /// @brief Generic wrapper for ELFRel and ELFRela. 40 /// 41 /// This helper class allows us to parse both ELFRel and ELFRela relocation 42 /// entries in a generic manner. 43 class ELFRelocation 44 { 45 public: 46 47 /// Constructs an ELFRelocation entry with a personality as given by @p 48 /// type. 49 /// 50 /// @param type Either DT_REL or DT_RELA. Any other value is invalid. 51 ELFRelocation(unsigned type); 52 53 ~ELFRelocation(); 54 55 bool 56 Parse(const lldb_private::DataExtractor &data, uint32_t *offset); 57 58 static unsigned 59 RelocType32(const ELFRelocation &rel); 60 61 static unsigned 62 RelocType64(const ELFRelocation &rel); 63 64 static unsigned 65 RelocSymbol32(const ELFRelocation &rel); 66 67 static unsigned 68 RelocSymbol64(const ELFRelocation &rel); 69 70 private: 71 typedef llvm::PointerUnion<ELFRel*, ELFRela*> RelocUnion; 72 73 RelocUnion reloc; 74 }; 75 76 ELFRelocation::ELFRelocation(unsigned type) 77 { 78 if (type == DT_REL) 79 reloc = new ELFRel(); 80 else if (type == DT_RELA) 81 reloc = new ELFRela(); 82 else { 83 assert(false && "unexpected relocation type"); 84 reloc = static_cast<ELFRel*>(NULL); 85 } 86 } 87 88 ELFRelocation::~ELFRelocation() 89 { 90 if (reloc.is<ELFRel*>()) 91 delete reloc.get<ELFRel*>(); 92 else 93 delete reloc.get<ELFRela*>(); 94 } 95 96 bool 97 ELFRelocation::Parse(const lldb_private::DataExtractor &data, uint32_t *offset) 98 { 99 if (reloc.is<ELFRel*>()) 100 return reloc.get<ELFRel*>()->Parse(data, offset); 101 else 102 return reloc.get<ELFRela*>()->Parse(data, offset); 103 } 104 105 unsigned 106 ELFRelocation::RelocType32(const ELFRelocation &rel) 107 { 108 if (rel.reloc.is<ELFRel*>()) 109 return ELFRel::RelocType32(*rel.reloc.get<ELFRel*>()); 110 else 111 return ELFRela::RelocType32(*rel.reloc.get<ELFRela*>()); 112 } 113 114 unsigned 115 ELFRelocation::RelocType64(const ELFRelocation &rel) 116 { 117 if (rel.reloc.is<ELFRel*>()) 118 return ELFRel::RelocType64(*rel.reloc.get<ELFRel*>()); 119 else 120 return ELFRela::RelocType64(*rel.reloc.get<ELFRela*>()); 121 } 122 123 unsigned 124 ELFRelocation::RelocSymbol32(const ELFRelocation &rel) 125 { 126 if (rel.reloc.is<ELFRel*>()) 127 return ELFRel::RelocSymbol32(*rel.reloc.get<ELFRel*>()); 128 else 129 return ELFRela::RelocSymbol32(*rel.reloc.get<ELFRela*>()); 130 } 131 132 unsigned 133 ELFRelocation::RelocSymbol64(const ELFRelocation &rel) 134 { 135 if (rel.reloc.is<ELFRel*>()) 136 return ELFRel::RelocSymbol64(*rel.reloc.get<ELFRel*>()); 137 else 138 return ELFRela::RelocSymbol64(*rel.reloc.get<ELFRela*>()); 139 } 140 141 } // end anonymous namespace 142 143 //------------------------------------------------------------------ 144 // Static methods. 145 //------------------------------------------------------------------ 146 void 147 ObjectFileELF::Initialize() 148 { 149 PluginManager::RegisterPlugin(GetPluginNameStatic(), 150 GetPluginDescriptionStatic(), 151 CreateInstance); 152 } 153 154 void 155 ObjectFileELF::Terminate() 156 { 157 PluginManager::UnregisterPlugin(CreateInstance); 158 } 159 160 const char * 161 ObjectFileELF::GetPluginNameStatic() 162 { 163 return "object-file.elf"; 164 } 165 166 const char * 167 ObjectFileELF::GetPluginDescriptionStatic() 168 { 169 return "ELF object file reader."; 170 } 171 172 ObjectFile * 173 ObjectFileELF::CreateInstance(Module *module, 174 DataBufferSP &data_sp, 175 const FileSpec *file, addr_t offset, 176 addr_t length) 177 { 178 if (data_sp && data_sp->GetByteSize() > (llvm::ELF::EI_NIDENT + offset)) 179 { 180 const uint8_t *magic = data_sp->GetBytes() + offset; 181 if (ELFHeader::MagicBytesMatch(magic)) 182 { 183 unsigned address_size = ELFHeader::AddressSizeInBytes(magic); 184 if (address_size == 4 || address_size == 8) 185 { 186 std::auto_ptr<ObjectFileELF> objfile_ap( 187 new ObjectFileELF(module, data_sp, file, offset, length)); 188 ArchSpec spec; 189 if (objfile_ap->GetArchitecture(spec) && 190 objfile_ap->SetModulesArchitecture(spec)) 191 return objfile_ap.release(); 192 } 193 } 194 } 195 return NULL; 196 } 197 198 199 //------------------------------------------------------------------ 200 // PluginInterface protocol 201 //------------------------------------------------------------------ 202 const char * 203 ObjectFileELF::GetPluginName() 204 { 205 return "ObjectFileELF"; 206 } 207 208 const char * 209 ObjectFileELF::GetShortPluginName() 210 { 211 return GetPluginNameStatic(); 212 } 213 214 uint32_t 215 ObjectFileELF::GetPluginVersion() 216 { 217 return m_plugin_version; 218 } 219 //------------------------------------------------------------------ 220 // ObjectFile protocol 221 //------------------------------------------------------------------ 222 223 ObjectFileELF::ObjectFileELF(Module* module, DataBufferSP& dataSP, 224 const FileSpec* file, addr_t offset, 225 addr_t length) 226 : ObjectFile(module, file, offset, length, dataSP), 227 m_header(), 228 m_program_headers(), 229 m_section_headers(), 230 m_sections_ap(), 231 m_symtab_ap(), 232 m_filespec_ap(), 233 m_shstr_data() 234 { 235 if (file) 236 m_file = *file; 237 ::memset(&m_header, 0, sizeof(m_header)); 238 } 239 240 ObjectFileELF::~ObjectFileELF() 241 { 242 } 243 244 bool 245 ObjectFileELF::IsExecutable() const 246 { 247 return m_header.e_entry != 0; 248 } 249 250 ByteOrder 251 ObjectFileELF::GetByteOrder() const 252 { 253 if (m_header.e_ident[EI_DATA] == ELFDATA2MSB) 254 return eByteOrderBig; 255 if (m_header.e_ident[EI_DATA] == ELFDATA2LSB) 256 return eByteOrderLittle; 257 return eByteOrderInvalid; 258 } 259 260 size_t 261 ObjectFileELF::GetAddressByteSize() const 262 { 263 return m_data.GetAddressByteSize(); 264 } 265 266 unsigned 267 ObjectFileELF::SectionIndex(const SectionHeaderCollIter &I) 268 { 269 return std::distance(m_section_headers.begin(), I) + 1; 270 } 271 272 unsigned 273 ObjectFileELF::SectionIndex(const SectionHeaderCollConstIter &I) const 274 { 275 return std::distance(m_section_headers.begin(), I) + 1; 276 } 277 278 bool 279 ObjectFileELF::ParseHeader() 280 { 281 uint32_t offset = GetOffset(); 282 return m_header.Parse(m_data, &offset); 283 } 284 285 bool 286 ObjectFileELF::GetUUID(lldb_private::UUID* uuid) 287 { 288 // FIXME: Return MD5 sum here. See comment in ObjectFile.h. 289 return false; 290 } 291 292 uint32_t 293 ObjectFileELF::GetDependentModules(FileSpecList &files) 294 { 295 size_t num_modules = ParseDependentModules(); 296 uint32_t num_specs = 0; 297 298 for (unsigned i = 0; i < num_modules; ++i) 299 { 300 if (files.AppendIfUnique(m_filespec_ap->GetFileSpecAtIndex(i))) 301 num_specs++; 302 } 303 304 return num_specs; 305 } 306 307 user_id_t 308 ObjectFileELF::GetSectionIndexByType(unsigned type) 309 { 310 if (!ParseSectionHeaders()) 311 return 0; 312 313 for (SectionHeaderCollIter sh_pos = m_section_headers.begin(); 314 sh_pos != m_section_headers.end(); ++sh_pos) 315 { 316 if (sh_pos->sh_type == type) 317 return SectionIndex(sh_pos); 318 } 319 320 return 0; 321 } 322 323 Address 324 ObjectFileELF::GetImageInfoAddress() 325 { 326 if (!ParseDynamicSymbols()) 327 return Address(); 328 329 SectionList *section_list = GetSectionList(); 330 if (!section_list) 331 return Address(); 332 333 user_id_t dynsym_id = GetSectionIndexByType(SHT_DYNAMIC); 334 if (!dynsym_id) 335 return Address(); 336 337 const ELFSectionHeader *dynsym_hdr = GetSectionHeaderByIndex(dynsym_id); 338 if (!dynsym_hdr) 339 return Address(); 340 341 Section *dynsym = section_list->FindSectionByID(dynsym_id).get(); 342 if (!dynsym) 343 return Address(); 344 345 for (size_t i = 0; i < m_dynamic_symbols.size(); ++i) 346 { 347 ELFDynamic &symbol = m_dynamic_symbols[i]; 348 349 if (symbol.d_tag == DT_DEBUG) 350 { 351 // Compute the offset as the number of previous entries plus the 352 // size of d_tag. 353 addr_t offset = i * dynsym_hdr->sh_entsize + GetAddressByteSize(); 354 return Address(dynsym, offset); 355 } 356 } 357 358 return Address(); 359 } 360 361 lldb_private::Address 362 ObjectFileELF::GetEntryPointAddress () 363 { 364 SectionList *sections; 365 addr_t offset; 366 367 if (m_entry_point_address.IsValid()) 368 return m_entry_point_address; 369 370 if (!ParseHeader() || !IsExecutable()) 371 return m_entry_point_address; 372 373 sections = GetSectionList(); 374 offset = m_header.e_entry; 375 376 if (!sections) 377 { 378 m_entry_point_address.SetOffset(offset); 379 return m_entry_point_address; 380 } 381 382 m_entry_point_address.ResolveAddressUsingFileSections(offset, sections); 383 384 return m_entry_point_address; 385 } 386 387 //---------------------------------------------------------------------- 388 // ParseDependentModules 389 //---------------------------------------------------------------------- 390 size_t 391 ObjectFileELF::ParseDependentModules() 392 { 393 if (m_filespec_ap.get()) 394 return m_filespec_ap->GetSize(); 395 396 m_filespec_ap.reset(new FileSpecList()); 397 398 if (!(ParseSectionHeaders() && GetSectionHeaderStringTable())) 399 return 0; 400 401 // Locate the dynamic table. 402 user_id_t dynsym_id = 0; 403 user_id_t dynstr_id = 0; 404 for (SectionHeaderCollIter sh_pos = m_section_headers.begin(); 405 sh_pos != m_section_headers.end(); ++sh_pos) 406 { 407 if (sh_pos->sh_type == SHT_DYNAMIC) 408 { 409 dynsym_id = SectionIndex(sh_pos); 410 dynstr_id = sh_pos->sh_link + 1; // Section ID's are 1 based. 411 break; 412 } 413 } 414 415 if (!(dynsym_id && dynstr_id)) 416 return 0; 417 418 SectionList *section_list = GetSectionList(); 419 if (!section_list) 420 return 0; 421 422 // Resolve and load the dynamic table entries and corresponding string 423 // table. 424 Section *dynsym = section_list->FindSectionByID(dynsym_id).get(); 425 Section *dynstr = section_list->FindSectionByID(dynstr_id).get(); 426 if (!(dynsym && dynstr)) 427 return 0; 428 429 DataExtractor dynsym_data; 430 DataExtractor dynstr_data; 431 if (dynsym->ReadSectionDataFromObjectFile(this, dynsym_data) && 432 dynstr->ReadSectionDataFromObjectFile(this, dynstr_data)) 433 { 434 ELFDynamic symbol; 435 const unsigned section_size = dynsym_data.GetByteSize(); 436 unsigned offset = 0; 437 438 // The only type of entries we are concerned with are tagged DT_NEEDED, 439 // yielding the name of a required library. 440 while (offset < section_size) 441 { 442 if (!symbol.Parse(dynsym_data, &offset)) 443 break; 444 445 if (symbol.d_tag != DT_NEEDED) 446 continue; 447 448 uint32_t str_index = static_cast<uint32_t>(symbol.d_val); 449 const char *lib_name = dynstr_data.PeekCStr(str_index); 450 m_filespec_ap->Append(FileSpec(lib_name, true)); 451 } 452 } 453 454 return m_filespec_ap->GetSize(); 455 } 456 457 //---------------------------------------------------------------------- 458 // ParseProgramHeaders 459 //---------------------------------------------------------------------- 460 size_t 461 ObjectFileELF::ParseProgramHeaders() 462 { 463 // We have already parsed the program headers 464 if (!m_program_headers.empty()) 465 return m_program_headers.size(); 466 467 // If there are no program headers to read we are done. 468 if (m_header.e_phnum == 0) 469 return 0; 470 471 m_program_headers.resize(m_header.e_phnum); 472 if (m_program_headers.size() != m_header.e_phnum) 473 return 0; 474 475 const size_t ph_size = m_header.e_phnum * m_header.e_phentsize; 476 const elf_off ph_offset = m_offset + m_header.e_phoff; 477 DataBufferSP buffer_sp(m_file.ReadFileContents(ph_offset, ph_size)); 478 479 if (buffer_sp.get() == NULL || buffer_sp->GetByteSize() != ph_size) 480 return 0; 481 482 DataExtractor data(buffer_sp, m_data.GetByteOrder(), 483 m_data.GetAddressByteSize()); 484 485 uint32_t idx; 486 uint32_t offset; 487 for (idx = 0, offset = 0; idx < m_header.e_phnum; ++idx) 488 { 489 if (m_program_headers[idx].Parse(data, &offset) == false) 490 break; 491 } 492 493 if (idx < m_program_headers.size()) 494 m_program_headers.resize(idx); 495 496 return m_program_headers.size(); 497 } 498 499 //---------------------------------------------------------------------- 500 // ParseSectionHeaders 501 //---------------------------------------------------------------------- 502 size_t 503 ObjectFileELF::ParseSectionHeaders() 504 { 505 // We have already parsed the section headers 506 if (!m_section_headers.empty()) 507 return m_section_headers.size(); 508 509 // If there are no section headers we are done. 510 if (m_header.e_shnum == 0) 511 return 0; 512 513 m_section_headers.resize(m_header.e_shnum); 514 if (m_section_headers.size() != m_header.e_shnum) 515 return 0; 516 517 const size_t sh_size = m_header.e_shnum * m_header.e_shentsize; 518 const elf_off sh_offset = m_offset + m_header.e_shoff; 519 DataBufferSP buffer_sp(m_file.ReadFileContents(sh_offset, sh_size)); 520 521 if (buffer_sp.get() == NULL || buffer_sp->GetByteSize() != sh_size) 522 return 0; 523 524 DataExtractor data(buffer_sp, 525 m_data.GetByteOrder(), 526 m_data.GetAddressByteSize()); 527 528 uint32_t idx; 529 uint32_t offset; 530 for (idx = 0, offset = 0; idx < m_header.e_shnum; ++idx) 531 { 532 if (m_section_headers[idx].Parse(data, &offset) == false) 533 break; 534 } 535 if (idx < m_section_headers.size()) 536 m_section_headers.resize(idx); 537 538 return m_section_headers.size(); 539 } 540 541 size_t 542 ObjectFileELF::GetSectionHeaderStringTable() 543 { 544 if (m_shstr_data.GetByteSize() == 0) 545 { 546 const unsigned strtab_idx = m_header.e_shstrndx; 547 548 if (strtab_idx && strtab_idx < m_section_headers.size()) 549 { 550 const ELFSectionHeader &sheader = m_section_headers[strtab_idx]; 551 const size_t byte_size = sheader.sh_size; 552 const Elf64_Off offset = m_offset + sheader.sh_offset; 553 DataBufferSP buffer_sp(m_file.ReadFileContents(offset, byte_size)); 554 555 if (buffer_sp.get() == NULL || buffer_sp->GetByteSize() != byte_size) 556 return 0; 557 558 m_shstr_data.SetData(buffer_sp); 559 } 560 } 561 return m_shstr_data.GetByteSize(); 562 } 563 564 lldb::user_id_t 565 ObjectFileELF::GetSectionIndexByName(const char *name) 566 { 567 if (!(ParseSectionHeaders() && GetSectionHeaderStringTable())) 568 return 0; 569 570 // Search the collection of section headers for one with a matching name. 571 for (SectionHeaderCollIter I = m_section_headers.begin(); 572 I != m_section_headers.end(); ++I) 573 { 574 const char *sectionName = m_shstr_data.PeekCStr(I->sh_name); 575 576 if (!sectionName) 577 return 0; 578 579 if (strcmp(name, sectionName) != 0) 580 continue; 581 582 return SectionIndex(I); 583 } 584 585 return 0; 586 } 587 588 const elf::ELFSectionHeader * 589 ObjectFileELF::GetSectionHeaderByIndex(lldb::user_id_t id) 590 { 591 if (!ParseSectionHeaders() || !id) 592 return NULL; 593 594 if (--id < m_section_headers.size()) 595 return &m_section_headers[id]; 596 597 return NULL; 598 } 599 600 SectionList * 601 ObjectFileELF::GetSectionList() 602 { 603 if (m_sections_ap.get()) 604 return m_sections_ap.get(); 605 606 if (ParseSectionHeaders() && GetSectionHeaderStringTable()) 607 { 608 m_sections_ap.reset(new SectionList()); 609 610 for (SectionHeaderCollIter I = m_section_headers.begin(); 611 I != m_section_headers.end(); ++I) 612 { 613 const ELFSectionHeader &header = *I; 614 615 ConstString name(m_shstr_data.PeekCStr(header.sh_name)); 616 uint64_t size = header.sh_type == SHT_NOBITS ? 0 : header.sh_size; 617 618 static ConstString g_sect_name_text (".text"); 619 static ConstString g_sect_name_data (".data"); 620 static ConstString g_sect_name_bss (".bss"); 621 static ConstString g_sect_name_dwarf_debug_abbrev (".debug_abbrev"); 622 static ConstString g_sect_name_dwarf_debug_aranges (".debug_aranges"); 623 static ConstString g_sect_name_dwarf_debug_frame (".debug_frame"); 624 static ConstString g_sect_name_dwarf_debug_info (".debug_info"); 625 static ConstString g_sect_name_dwarf_debug_line (".debug_line"); 626 static ConstString g_sect_name_dwarf_debug_loc (".debug_loc"); 627 static ConstString g_sect_name_dwarf_debug_macinfo (".debug_macinfo"); 628 static ConstString g_sect_name_dwarf_debug_pubnames (".debug_pubnames"); 629 static ConstString g_sect_name_dwarf_debug_pubtypes (".debug_pubtypes"); 630 static ConstString g_sect_name_dwarf_debug_ranges (".debug_ranges"); 631 static ConstString g_sect_name_dwarf_debug_str (".debug_str"); 632 static ConstString g_sect_name_eh_frame (".eh_frame"); 633 634 SectionType sect_type = eSectionTypeOther; 635 636 if (name == g_sect_name_text) sect_type = eSectionTypeCode; 637 else if (name == g_sect_name_data) sect_type = eSectionTypeData; 638 else if (name == g_sect_name_bss) sect_type = eSectionTypeZeroFill; 639 else if (name == g_sect_name_dwarf_debug_abbrev) sect_type = eSectionTypeDWARFDebugAbbrev; 640 else if (name == g_sect_name_dwarf_debug_aranges) sect_type = eSectionTypeDWARFDebugAranges; 641 else if (name == g_sect_name_dwarf_debug_frame) sect_type = eSectionTypeDWARFDebugFrame; 642 else if (name == g_sect_name_dwarf_debug_info) sect_type = eSectionTypeDWARFDebugInfo; 643 else if (name == g_sect_name_dwarf_debug_line) sect_type = eSectionTypeDWARFDebugLine; 644 else if (name == g_sect_name_dwarf_debug_loc) sect_type = eSectionTypeDWARFDebugLoc; 645 else if (name == g_sect_name_dwarf_debug_macinfo) sect_type = eSectionTypeDWARFDebugMacInfo; 646 else if (name == g_sect_name_dwarf_debug_pubnames) sect_type = eSectionTypeDWARFDebugPubNames; 647 else if (name == g_sect_name_dwarf_debug_pubtypes) sect_type = eSectionTypeDWARFDebugPubTypes; 648 else if (name == g_sect_name_dwarf_debug_ranges) sect_type = eSectionTypeDWARFDebugRanges; 649 else if (name == g_sect_name_dwarf_debug_str) sect_type = eSectionTypeDWARFDebugStr; 650 else if (name == g_sect_name_eh_frame) sect_type = eSectionTypeEHFrame; 651 652 653 SectionSP section(new Section( 654 0, // Parent section. 655 GetModule(), // Module to which this section belongs. 656 SectionIndex(I), // Section ID. 657 name, // Section name. 658 sect_type, // Section type. 659 header.sh_addr, // VM address. 660 header.sh_size, // VM size in bytes of this section. 661 header.sh_offset, // Offset of this section in the file. 662 size, // Size of the section as found in the file. 663 header.sh_flags)); // Flags for this section. 664 665 m_sections_ap->AddSection(section); 666 } 667 } 668 669 return m_sections_ap.get(); 670 } 671 672 static unsigned 673 ParseSymbols(Symtab *symtab, 674 user_id_t start_id, 675 SectionList *section_list, 676 const ELFSectionHeader *symtab_shdr, 677 const DataExtractor &symtab_data, 678 const DataExtractor &strtab_data) 679 { 680 ELFSymbol symbol; 681 uint32_t offset = 0; 682 const unsigned num_symbols = 683 symtab_data.GetByteSize() / symtab_shdr->sh_entsize; 684 685 static ConstString text_section_name(".text"); 686 static ConstString init_section_name(".init"); 687 static ConstString fini_section_name(".fini"); 688 static ConstString ctors_section_name(".ctors"); 689 static ConstString dtors_section_name(".dtors"); 690 691 static ConstString data_section_name(".data"); 692 static ConstString rodata_section_name(".rodata"); 693 static ConstString rodata1_section_name(".rodata1"); 694 static ConstString data2_section_name(".data1"); 695 static ConstString bss_section_name(".bss"); 696 697 unsigned i; 698 for (i = 0; i < num_symbols; ++i) 699 { 700 if (symbol.Parse(symtab_data, &offset) == false) 701 break; 702 703 Section *symbol_section = NULL; 704 SymbolType symbol_type = eSymbolTypeInvalid; 705 Elf64_Half symbol_idx = symbol.st_shndx; 706 707 switch (symbol_idx) 708 { 709 case SHN_ABS: 710 symbol_type = eSymbolTypeAbsolute; 711 break; 712 case SHN_UNDEF: 713 symbol_type = eSymbolTypeUndefined; 714 break; 715 default: 716 symbol_section = section_list->GetSectionAtIndex(symbol_idx).get(); 717 break; 718 } 719 720 switch (symbol.getType()) 721 { 722 default: 723 case STT_NOTYPE: 724 // The symbol's type is not specified. 725 break; 726 727 case STT_OBJECT: 728 // The symbol is associated with a data object, such as a variable, 729 // an array, etc. 730 symbol_type = eSymbolTypeData; 731 break; 732 733 case STT_FUNC: 734 // The symbol is associated with a function or other executable code. 735 symbol_type = eSymbolTypeCode; 736 break; 737 738 case STT_SECTION: 739 // The symbol is associated with a section. Symbol table entries of 740 // this type exist primarily for relocation and normally have 741 // STB_LOCAL binding. 742 break; 743 744 case STT_FILE: 745 // Conventionally, the symbol's name gives the name of the source 746 // file associated with the object file. A file symbol has STB_LOCAL 747 // binding, its section index is SHN_ABS, and it precedes the other 748 // STB_LOCAL symbols for the file, if it is present. 749 symbol_type = eSymbolTypeObjectFile; 750 break; 751 } 752 753 if (symbol_type == eSymbolTypeInvalid) 754 { 755 if (symbol_section) 756 { 757 const ConstString §_name = symbol_section->GetName(); 758 if (sect_name == text_section_name || 759 sect_name == init_section_name || 760 sect_name == fini_section_name || 761 sect_name == ctors_section_name || 762 sect_name == dtors_section_name) 763 { 764 symbol_type = eSymbolTypeCode; 765 } 766 else if (sect_name == data_section_name || 767 sect_name == data2_section_name || 768 sect_name == rodata_section_name || 769 sect_name == rodata1_section_name || 770 sect_name == bss_section_name) 771 { 772 symbol_type = eSymbolTypeData; 773 } 774 } 775 } 776 777 uint64_t symbol_value = symbol.st_value; 778 if (symbol_section != NULL) 779 symbol_value -= symbol_section->GetFileAddress(); 780 const char *symbol_name = strtab_data.PeekCStr(symbol.st_name); 781 bool is_global = symbol.getBinding() == STB_GLOBAL; 782 uint32_t flags = symbol.st_other << 8 | symbol.st_info; 783 784 Symbol dc_symbol( 785 i + start_id, // ID is the original symbol table index. 786 symbol_name, // Symbol name. 787 false, // Is the symbol name mangled? 788 symbol_type, // Type of this symbol 789 is_global, // Is this globally visible? 790 false, // Is this symbol debug info? 791 false, // Is this symbol a trampoline? 792 false, // Is this symbol artificial? 793 symbol_section, // Section in which this symbol is defined or null. 794 symbol_value, // Offset in section or symbol value. 795 symbol.st_size, // Size in bytes of this symbol. 796 flags); // Symbol flags. 797 symtab->AddSymbol(dc_symbol); 798 } 799 800 return i; 801 } 802 803 unsigned 804 ObjectFileELF::ParseSymbolTable(Symtab *symbol_table, user_id_t start_id, 805 const ELFSectionHeader *symtab_hdr, 806 user_id_t symtab_id) 807 { 808 assert(symtab_hdr->sh_type == SHT_SYMTAB || 809 symtab_hdr->sh_type == SHT_DYNSYM); 810 811 // Parse in the section list if needed. 812 SectionList *section_list = GetSectionList(); 813 if (!section_list) 814 return 0; 815 816 // Section ID's are ones based. 817 user_id_t strtab_id = symtab_hdr->sh_link + 1; 818 819 Section *symtab = section_list->FindSectionByID(symtab_id).get(); 820 Section *strtab = section_list->FindSectionByID(strtab_id).get(); 821 unsigned num_symbols = 0; 822 if (symtab && strtab) 823 { 824 DataExtractor symtab_data; 825 DataExtractor strtab_data; 826 if (symtab->ReadSectionDataFromObjectFile(this, symtab_data) && 827 strtab->ReadSectionDataFromObjectFile(this, strtab_data)) 828 { 829 num_symbols = ParseSymbols(symbol_table, start_id, 830 section_list, symtab_hdr, 831 symtab_data, strtab_data); 832 } 833 } 834 835 return num_symbols; 836 } 837 838 size_t 839 ObjectFileELF::ParseDynamicSymbols() 840 { 841 if (m_dynamic_symbols.size()) 842 return m_dynamic_symbols.size(); 843 844 user_id_t dyn_id = GetSectionIndexByType(SHT_DYNAMIC); 845 if (!dyn_id) 846 return NULL; 847 848 SectionList *section_list = GetSectionList(); 849 if (!section_list) 850 return NULL; 851 852 Section *dynsym = section_list->FindSectionByID(dyn_id).get(); 853 if (!dynsym) 854 return NULL; 855 856 ELFDynamic symbol; 857 DataExtractor dynsym_data; 858 if (dynsym->ReadSectionDataFromObjectFile(this, dynsym_data)) 859 { 860 861 const unsigned section_size = dynsym_data.GetByteSize(); 862 unsigned offset = 0; 863 unsigned cursor = 0; 864 865 while (cursor < section_size) 866 { 867 offset = cursor; 868 if (!symbol.Parse(dynsym_data, &cursor)) 869 break; 870 871 m_dynamic_symbols.push_back(symbol); 872 } 873 } 874 875 return m_dynamic_symbols.size(); 876 } 877 878 const ELFDynamic * 879 ObjectFileELF::FindDynamicSymbol(unsigned tag) 880 { 881 if (!ParseDynamicSymbols()) 882 return NULL; 883 884 SectionList *section_list = GetSectionList(); 885 if (!section_list) 886 return 0; 887 888 DynamicSymbolCollIter I = m_dynamic_symbols.begin(); 889 DynamicSymbolCollIter E = m_dynamic_symbols.end(); 890 for ( ; I != E; ++I) 891 { 892 ELFDynamic *symbol = &*I; 893 894 if (symbol->d_tag == tag) 895 return symbol; 896 } 897 898 return NULL; 899 } 900 901 Section * 902 ObjectFileELF::PLTSection() 903 { 904 const ELFDynamic *symbol = FindDynamicSymbol(DT_JMPREL); 905 SectionList *section_list = GetSectionList(); 906 907 if (symbol && section_list) 908 { 909 addr_t addr = symbol->d_ptr; 910 return section_list->FindSectionContainingFileAddress(addr).get(); 911 } 912 913 return NULL; 914 } 915 916 unsigned 917 ObjectFileELF::PLTRelocationType() 918 { 919 const ELFDynamic *symbol = FindDynamicSymbol(DT_PLTREL); 920 921 if (symbol) 922 return symbol->d_val; 923 924 return 0; 925 } 926 927 static unsigned 928 ParsePLTRelocations(Symtab *symbol_table, 929 user_id_t start_id, 930 unsigned rel_type, 931 const ELFHeader *hdr, 932 const ELFSectionHeader *rel_hdr, 933 const ELFSectionHeader *plt_hdr, 934 const ELFSectionHeader *sym_hdr, 935 Section *plt_section, 936 DataExtractor &rel_data, 937 DataExtractor &symtab_data, 938 DataExtractor &strtab_data) 939 { 940 ELFRelocation rel(rel_type); 941 ELFSymbol symbol; 942 uint32_t offset = 0; 943 const unsigned plt_entsize = plt_hdr->sh_entsize; 944 const unsigned num_relocations = rel_hdr->sh_size / rel_hdr->sh_entsize; 945 946 typedef unsigned (*reloc_info_fn)(const ELFRelocation &rel); 947 reloc_info_fn reloc_type; 948 reloc_info_fn reloc_symbol; 949 950 if (hdr->Is32Bit() == 4) 951 { 952 reloc_type = ELFRelocation::RelocType32; 953 reloc_symbol = ELFRelocation::RelocSymbol32; 954 } 955 else 956 { 957 reloc_type = ELFRelocation::RelocType64; 958 reloc_symbol = ELFRelocation::RelocSymbol64; 959 } 960 961 unsigned slot_type = hdr->GetRelocationJumpSlotType(); 962 unsigned i; 963 for (i = 0; i < num_relocations; ++i) 964 { 965 if (rel.Parse(rel_data, &offset) == false) 966 break; 967 968 if (reloc_type(rel) != slot_type) 969 continue; 970 971 unsigned symbol_offset = reloc_symbol(rel) * sym_hdr->sh_entsize; 972 uint64_t plt_index = (i + 1) * plt_entsize; 973 974 if (!symbol.Parse(symtab_data, &symbol_offset)) 975 break; 976 977 const char *symbol_name = strtab_data.PeekCStr(symbol.st_name); 978 979 Symbol jump_symbol( 980 i + start_id, // Symbol table index 981 symbol_name, // symbol name. 982 false, // is the symbol name mangled? 983 eSymbolTypeTrampoline, // Type of this symbol 984 false, // Is this globally visible? 985 false, // Is this symbol debug info? 986 true, // Is this symbol a trampoline? 987 true, // Is this symbol artificial? 988 plt_section, // Section in which this symbol is defined or null. 989 plt_index, // Offset in section or symbol value. 990 plt_entsize, // Size in bytes of this symbol. 991 0); // Symbol flags. 992 993 symbol_table->AddSymbol(jump_symbol); 994 } 995 996 return i; 997 } 998 999 unsigned 1000 ObjectFileELF::ParseTrampolineSymbols(Symtab *symbol_table, 1001 user_id_t start_id, 1002 const ELFSectionHeader *rel_hdr, 1003 user_id_t rel_id) 1004 { 1005 assert(rel_hdr->sh_type == SHT_RELA || rel_hdr->sh_type == SHT_REL); 1006 1007 // The link field points to the asscoiated symbol table. The info field 1008 // points to the section holding the plt. 1009 user_id_t symtab_id = rel_hdr->sh_link; 1010 user_id_t plt_id = rel_hdr->sh_info; 1011 1012 if (!symtab_id || !plt_id) 1013 return 0; 1014 1015 // Section ID's are ones based; 1016 symtab_id++; 1017 plt_id++; 1018 1019 const ELFSectionHeader *plt_hdr = GetSectionHeaderByIndex(plt_id); 1020 if (!plt_hdr) 1021 return 0; 1022 1023 const ELFSectionHeader *sym_hdr = GetSectionHeaderByIndex(symtab_id); 1024 if (!sym_hdr) 1025 return 0; 1026 1027 SectionList *section_list = GetSectionList(); 1028 if (!section_list) 1029 return 0; 1030 1031 Section *rel_section = section_list->FindSectionByID(rel_id).get(); 1032 if (!rel_section) 1033 return 0; 1034 1035 Section *plt_section = section_list->FindSectionByID(plt_id).get(); 1036 if (!plt_section) 1037 return 0; 1038 1039 Section *symtab = section_list->FindSectionByID(symtab_id).get(); 1040 if (!symtab) 1041 return 0; 1042 1043 Section *strtab = section_list->FindSectionByID(sym_hdr->sh_link + 1).get(); 1044 if (!strtab) 1045 return 0; 1046 1047 DataExtractor rel_data; 1048 if (!rel_section->ReadSectionDataFromObjectFile(this, rel_data)) 1049 return 0; 1050 1051 DataExtractor symtab_data; 1052 if (!symtab->ReadSectionDataFromObjectFile(this, symtab_data)) 1053 return 0; 1054 1055 DataExtractor strtab_data; 1056 if (!strtab->ReadSectionDataFromObjectFile(this, strtab_data)) 1057 return 0; 1058 1059 unsigned rel_type = PLTRelocationType(); 1060 if (!rel_type) 1061 return 0; 1062 1063 return ParsePLTRelocations(symbol_table, start_id, rel_type, 1064 &m_header, rel_hdr, plt_hdr, sym_hdr, 1065 plt_section, 1066 rel_data, symtab_data, strtab_data); 1067 } 1068 1069 Symtab * 1070 ObjectFileELF::GetSymtab() 1071 { 1072 if (m_symtab_ap.get()) 1073 return m_symtab_ap.get(); 1074 1075 Symtab *symbol_table = new Symtab(this); 1076 m_symtab_ap.reset(symbol_table); 1077 1078 Mutex::Locker locker(symbol_table->GetMutex()); 1079 1080 if (!(ParseSectionHeaders() && GetSectionHeaderStringTable())) 1081 return symbol_table; 1082 1083 // Locate and parse all linker symbol tables. 1084 uint64_t symbol_id = 0; 1085 for (SectionHeaderCollIter I = m_section_headers.begin(); 1086 I != m_section_headers.end(); ++I) 1087 { 1088 if (I->sh_type == SHT_SYMTAB || I->sh_type == SHT_DYNSYM) 1089 { 1090 const ELFSectionHeader &symtab_header = *I; 1091 user_id_t section_id = SectionIndex(I); 1092 symbol_id += ParseSymbolTable(symbol_table, symbol_id, 1093 &symtab_header, section_id); 1094 } 1095 } 1096 1097 // Synthesize trampoline symbols to help navigate the PLT. 1098 Section *reloc_section = PLTSection(); 1099 if (reloc_section) 1100 { 1101 user_id_t reloc_id = reloc_section->GetID(); 1102 const ELFSectionHeader *reloc_header = GetSectionHeaderByIndex(reloc_id); 1103 assert(reloc_header); 1104 1105 ParseTrampolineSymbols(symbol_table, symbol_id, reloc_header, reloc_id); 1106 } 1107 1108 return symbol_table; 1109 } 1110 1111 //===----------------------------------------------------------------------===// 1112 // Dump 1113 // 1114 // Dump the specifics of the runtime file container (such as any headers 1115 // segments, sections, etc). 1116 //---------------------------------------------------------------------- 1117 void 1118 ObjectFileELF::Dump(Stream *s) 1119 { 1120 DumpELFHeader(s, m_header); 1121 s->EOL(); 1122 DumpELFProgramHeaders(s); 1123 s->EOL(); 1124 DumpELFSectionHeaders(s); 1125 s->EOL(); 1126 SectionList *section_list = GetSectionList(); 1127 if (section_list) 1128 section_list->Dump(s, NULL, true, UINT32_MAX); 1129 Symtab *symtab = GetSymtab(); 1130 if (symtab) 1131 symtab->Dump(s, NULL, eSortOrderNone); 1132 s->EOL(); 1133 DumpDependentModules(s); 1134 s->EOL(); 1135 } 1136 1137 //---------------------------------------------------------------------- 1138 // DumpELFHeader 1139 // 1140 // Dump the ELF header to the specified output stream 1141 //---------------------------------------------------------------------- 1142 void 1143 ObjectFileELF::DumpELFHeader(Stream *s, const ELFHeader &header) 1144 { 1145 s->PutCString("ELF Header\n"); 1146 s->Printf("e_ident[EI_MAG0 ] = 0x%2.2x\n", header.e_ident[EI_MAG0]); 1147 s->Printf("e_ident[EI_MAG1 ] = 0x%2.2x '%c'\n", 1148 header.e_ident[EI_MAG1], header.e_ident[EI_MAG1]); 1149 s->Printf("e_ident[EI_MAG2 ] = 0x%2.2x '%c'\n", 1150 header.e_ident[EI_MAG2], header.e_ident[EI_MAG2]); 1151 s->Printf("e_ident[EI_MAG3 ] = 0x%2.2x '%c'\n", 1152 header.e_ident[EI_MAG3], header.e_ident[EI_MAG3]); 1153 1154 s->Printf("e_ident[EI_CLASS ] = 0x%2.2x\n", header.e_ident[EI_CLASS]); 1155 s->Printf("e_ident[EI_DATA ] = 0x%2.2x ", header.e_ident[EI_DATA]); 1156 DumpELFHeader_e_ident_EI_DATA(s, header.e_ident[EI_DATA]); 1157 s->Printf ("\ne_ident[EI_VERSION] = 0x%2.2x\n", header.e_ident[EI_VERSION]); 1158 s->Printf ("e_ident[EI_PAD ] = 0x%2.2x\n", header.e_ident[EI_PAD]); 1159 1160 s->Printf("e_type = 0x%4.4x ", header.e_type); 1161 DumpELFHeader_e_type(s, header.e_type); 1162 s->Printf("\ne_machine = 0x%4.4x\n", header.e_machine); 1163 s->Printf("e_version = 0x%8.8x\n", header.e_version); 1164 s->Printf("e_entry = 0x%8.8lx\n", header.e_entry); 1165 s->Printf("e_phoff = 0x%8.8lx\n", header.e_phoff); 1166 s->Printf("e_shoff = 0x%8.8lx\n", header.e_shoff); 1167 s->Printf("e_flags = 0x%8.8x\n", header.e_flags); 1168 s->Printf("e_ehsize = 0x%4.4x\n", header.e_ehsize); 1169 s->Printf("e_phentsize = 0x%4.4x\n", header.e_phentsize); 1170 s->Printf("e_phnum = 0x%4.4x\n", header.e_phnum); 1171 s->Printf("e_shentsize = 0x%4.4x\n", header.e_shentsize); 1172 s->Printf("e_shnum = 0x%4.4x\n", header.e_shnum); 1173 s->Printf("e_shstrndx = 0x%4.4x\n", header.e_shstrndx); 1174 } 1175 1176 //---------------------------------------------------------------------- 1177 // DumpELFHeader_e_type 1178 // 1179 // Dump an token value for the ELF header member e_type 1180 //---------------------------------------------------------------------- 1181 void 1182 ObjectFileELF::DumpELFHeader_e_type(Stream *s, elf_half e_type) 1183 { 1184 switch (e_type) 1185 { 1186 case ET_NONE: *s << "ET_NONE"; break; 1187 case ET_REL: *s << "ET_REL"; break; 1188 case ET_EXEC: *s << "ET_EXEC"; break; 1189 case ET_DYN: *s << "ET_DYN"; break; 1190 case ET_CORE: *s << "ET_CORE"; break; 1191 default: 1192 break; 1193 } 1194 } 1195 1196 //---------------------------------------------------------------------- 1197 // DumpELFHeader_e_ident_EI_DATA 1198 // 1199 // Dump an token value for the ELF header member e_ident[EI_DATA] 1200 //---------------------------------------------------------------------- 1201 void 1202 ObjectFileELF::DumpELFHeader_e_ident_EI_DATA(Stream *s, unsigned char ei_data) 1203 { 1204 switch (ei_data) 1205 { 1206 case ELFDATANONE: *s << "ELFDATANONE"; break; 1207 case ELFDATA2LSB: *s << "ELFDATA2LSB - Little Endian"; break; 1208 case ELFDATA2MSB: *s << "ELFDATA2MSB - Big Endian"; break; 1209 default: 1210 break; 1211 } 1212 } 1213 1214 1215 //---------------------------------------------------------------------- 1216 // DumpELFProgramHeader 1217 // 1218 // Dump a single ELF program header to the specified output stream 1219 //---------------------------------------------------------------------- 1220 void 1221 ObjectFileELF::DumpELFProgramHeader(Stream *s, const ELFProgramHeader &ph) 1222 { 1223 DumpELFProgramHeader_p_type(s, ph.p_type); 1224 s->Printf(" %8.8lx %8.8lx %8.8lx", ph.p_offset, ph.p_vaddr, ph.p_paddr); 1225 s->Printf(" %8.8lx %8.8lx %8.8lx (", ph.p_filesz, ph.p_memsz, ph.p_flags); 1226 1227 DumpELFProgramHeader_p_flags(s, ph.p_flags); 1228 s->Printf(") %8.8x", ph.p_align); 1229 } 1230 1231 //---------------------------------------------------------------------- 1232 // DumpELFProgramHeader_p_type 1233 // 1234 // Dump an token value for the ELF program header member p_type which 1235 // describes the type of the program header 1236 // ---------------------------------------------------------------------- 1237 void 1238 ObjectFileELF::DumpELFProgramHeader_p_type(Stream *s, elf_word p_type) 1239 { 1240 const int kStrWidth = 10; 1241 switch (p_type) 1242 { 1243 CASE_AND_STREAM(s, PT_NULL , kStrWidth); 1244 CASE_AND_STREAM(s, PT_LOAD , kStrWidth); 1245 CASE_AND_STREAM(s, PT_DYNAMIC , kStrWidth); 1246 CASE_AND_STREAM(s, PT_INTERP , kStrWidth); 1247 CASE_AND_STREAM(s, PT_NOTE , kStrWidth); 1248 CASE_AND_STREAM(s, PT_SHLIB , kStrWidth); 1249 CASE_AND_STREAM(s, PT_PHDR , kStrWidth); 1250 default: 1251 s->Printf("0x%8.8x%*s", p_type, kStrWidth - 10, ""); 1252 break; 1253 } 1254 } 1255 1256 1257 //---------------------------------------------------------------------- 1258 // DumpELFProgramHeader_p_flags 1259 // 1260 // Dump an token value for the ELF program header member p_flags 1261 //---------------------------------------------------------------------- 1262 void 1263 ObjectFileELF::DumpELFProgramHeader_p_flags(Stream *s, elf_word p_flags) 1264 { 1265 *s << ((p_flags & PF_X) ? "PF_X" : " ") 1266 << (((p_flags & PF_X) && (p_flags & PF_W)) ? '+' : ' ') 1267 << ((p_flags & PF_W) ? "PF_W" : " ") 1268 << (((p_flags & PF_W) && (p_flags & PF_R)) ? '+' : ' ') 1269 << ((p_flags & PF_R) ? "PF_R" : " "); 1270 } 1271 1272 //---------------------------------------------------------------------- 1273 // DumpELFProgramHeaders 1274 // 1275 // Dump all of the ELF program header to the specified output stream 1276 //---------------------------------------------------------------------- 1277 void 1278 ObjectFileELF::DumpELFProgramHeaders(Stream *s) 1279 { 1280 if (ParseProgramHeaders()) 1281 { 1282 s->PutCString("Program Headers\n"); 1283 s->PutCString("IDX p_type p_offset p_vaddr p_paddr " 1284 "p_filesz p_memsz p_flags p_align\n"); 1285 s->PutCString("==== ---------- -------- -------- -------- " 1286 "-------- -------- ------------------------- --------\n"); 1287 1288 uint32_t idx = 0; 1289 for (ProgramHeaderCollConstIter I = m_program_headers.begin(); 1290 I != m_program_headers.end(); ++I, ++idx) 1291 { 1292 s->Printf("[%2u] ", idx); 1293 ObjectFileELF::DumpELFProgramHeader(s, *I); 1294 s->EOL(); 1295 } 1296 } 1297 } 1298 1299 //---------------------------------------------------------------------- 1300 // DumpELFSectionHeader 1301 // 1302 // Dump a single ELF section header to the specified output stream 1303 //---------------------------------------------------------------------- 1304 void 1305 ObjectFileELF::DumpELFSectionHeader(Stream *s, const ELFSectionHeader &sh) 1306 { 1307 s->Printf("%8.8x ", sh.sh_name); 1308 DumpELFSectionHeader_sh_type(s, sh.sh_type); 1309 s->Printf(" %8.8lx (", sh.sh_flags); 1310 DumpELFSectionHeader_sh_flags(s, sh.sh_flags); 1311 s->Printf(") %8.8lx %8.8lx %8.8lx", sh.sh_addr, sh.sh_offset, sh.sh_size); 1312 s->Printf(" %8.8x %8.8x", sh.sh_link, sh.sh_info); 1313 s->Printf(" %8.8lx %8.8lx", sh.sh_addralign, sh.sh_entsize); 1314 } 1315 1316 //---------------------------------------------------------------------- 1317 // DumpELFSectionHeader_sh_type 1318 // 1319 // Dump an token value for the ELF section header member sh_type which 1320 // describes the type of the section 1321 //---------------------------------------------------------------------- 1322 void 1323 ObjectFileELF::DumpELFSectionHeader_sh_type(Stream *s, elf_word sh_type) 1324 { 1325 const int kStrWidth = 12; 1326 switch (sh_type) 1327 { 1328 CASE_AND_STREAM(s, SHT_NULL , kStrWidth); 1329 CASE_AND_STREAM(s, SHT_PROGBITS , kStrWidth); 1330 CASE_AND_STREAM(s, SHT_SYMTAB , kStrWidth); 1331 CASE_AND_STREAM(s, SHT_STRTAB , kStrWidth); 1332 CASE_AND_STREAM(s, SHT_RELA , kStrWidth); 1333 CASE_AND_STREAM(s, SHT_HASH , kStrWidth); 1334 CASE_AND_STREAM(s, SHT_DYNAMIC , kStrWidth); 1335 CASE_AND_STREAM(s, SHT_NOTE , kStrWidth); 1336 CASE_AND_STREAM(s, SHT_NOBITS , kStrWidth); 1337 CASE_AND_STREAM(s, SHT_REL , kStrWidth); 1338 CASE_AND_STREAM(s, SHT_SHLIB , kStrWidth); 1339 CASE_AND_STREAM(s, SHT_DYNSYM , kStrWidth); 1340 CASE_AND_STREAM(s, SHT_LOPROC , kStrWidth); 1341 CASE_AND_STREAM(s, SHT_HIPROC , kStrWidth); 1342 CASE_AND_STREAM(s, SHT_LOUSER , kStrWidth); 1343 CASE_AND_STREAM(s, SHT_HIUSER , kStrWidth); 1344 default: 1345 s->Printf("0x%8.8x%*s", sh_type, kStrWidth - 10, ""); 1346 break; 1347 } 1348 } 1349 1350 //---------------------------------------------------------------------- 1351 // DumpELFSectionHeader_sh_flags 1352 // 1353 // Dump an token value for the ELF section header member sh_flags 1354 //---------------------------------------------------------------------- 1355 void 1356 ObjectFileELF::DumpELFSectionHeader_sh_flags(Stream *s, elf_word sh_flags) 1357 { 1358 *s << ((sh_flags & SHF_WRITE) ? "WRITE" : " ") 1359 << (((sh_flags & SHF_WRITE) && (sh_flags & SHF_ALLOC)) ? '+' : ' ') 1360 << ((sh_flags & SHF_ALLOC) ? "ALLOC" : " ") 1361 << (((sh_flags & SHF_ALLOC) && (sh_flags & SHF_EXECINSTR)) ? '+' : ' ') 1362 << ((sh_flags & SHF_EXECINSTR) ? "EXECINSTR" : " "); 1363 } 1364 1365 //---------------------------------------------------------------------- 1366 // DumpELFSectionHeaders 1367 // 1368 // Dump all of the ELF section header to the specified output stream 1369 //---------------------------------------------------------------------- 1370 void 1371 ObjectFileELF::DumpELFSectionHeaders(Stream *s) 1372 { 1373 if (!(ParseSectionHeaders() && GetSectionHeaderStringTable())) 1374 return; 1375 1376 s->PutCString("Section Headers\n"); 1377 s->PutCString("IDX name type flags " 1378 "addr offset size link info addralgn " 1379 "entsize Name\n"); 1380 s->PutCString("==== -------- ------------ -------------------------------- " 1381 "-------- -------- -------- -------- -------- -------- " 1382 "-------- ====================\n"); 1383 1384 uint32_t idx = 0; 1385 for (SectionHeaderCollConstIter I = m_section_headers.begin(); 1386 I != m_section_headers.end(); ++I, ++idx) 1387 { 1388 s->Printf("[%2u] ", idx); 1389 ObjectFileELF::DumpELFSectionHeader(s, *I); 1390 const char* section_name = m_shstr_data.PeekCStr(I->sh_name); 1391 if (section_name) 1392 *s << ' ' << section_name << "\n"; 1393 } 1394 } 1395 1396 void 1397 ObjectFileELF::DumpDependentModules(lldb_private::Stream *s) 1398 { 1399 size_t num_modules = ParseDependentModules(); 1400 1401 if (num_modules > 0) 1402 { 1403 s->PutCString("Dependent Modules:\n"); 1404 for (unsigned i = 0; i < num_modules; ++i) 1405 { 1406 const FileSpec &spec = m_filespec_ap->GetFileSpecAtIndex(i); 1407 s->Printf(" %s\n", spec.GetFilename().GetCString()); 1408 } 1409 } 1410 } 1411 1412 bool 1413 ObjectFileELF::GetArchitecture (ArchSpec &arch) 1414 { 1415 if (!ParseHeader()) 1416 return false; 1417 1418 arch.SetArchitecture (eArchTypeELF, m_header.e_machine, LLDB_INVALID_CPUTYPE); 1419 arch.GetTriple().setOSName (Host::GetOSString().GetCString()); 1420 arch.GetTriple().setVendorName(Host::GetVendorString().GetCString()); 1421 return true; 1422 } 1423 1424