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/MachO.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/PluginManager.h" 20 #include "lldb/Core/Section.h" 21 #include "lldb/Core/StreamFile.h" 22 #include "lldb/Core/StreamString.h" 23 #include "lldb/Core/Timer.h" 24 #include "lldb/Core/UUID.h" 25 #include "lldb/Symbol/ObjectFile.h" 26 27 static uint32_t COFFMachineToMachCPU(uint16_t machine); 28 29 #define IMAGE_FILE_MACHINE_UNKNOWN 0x0000 30 #define IMAGE_FILE_MACHINE_AM33 0x01d3 // Matsushita AM33 31 #define IMAGE_FILE_MACHINE_AMD64 0x8664 // x64 32 #define IMAGE_FILE_MACHINE_ARM 0x01c0 // ARM little endian 33 #define IMAGE_FILE_MACHINE_EBC 0x0ebc // EFI byte code 34 #define IMAGE_FILE_MACHINE_I386 0x014c // Intel 386 or later processors and compatible processors 35 #define IMAGE_FILE_MACHINE_IA64 0x0200 // Intel Itanium processor family 36 #define IMAGE_FILE_MACHINE_M32R 0x9041 // Mitsubishi M32R little endian 37 #define IMAGE_FILE_MACHINE_MIPS16 0x0266 // MIPS16 38 #define IMAGE_FILE_MACHINE_MIPSFPU 0x0366 // MIPS with FPU 39 #define IMAGE_FILE_MACHINE_MIPSFPU16 0x0466 // MIPS16 with FPU 40 #define IMAGE_FILE_MACHINE_POWERPC 0x01f0 // Power PC little endian 41 #define IMAGE_FILE_MACHINE_POWERPCFP 0x01f1 // Power PC with floating point support 42 #define IMAGE_FILE_MACHINE_R4000 0x0166 // MIPS little endian 43 #define IMAGE_FILE_MACHINE_SH3 0x01a2 // Hitachi SH3 44 #define IMAGE_FILE_MACHINE_SH3DSP 0x01a3 // Hitachi SH3 DSP 45 #define IMAGE_FILE_MACHINE_SH4 0x01a6 // Hitachi SH4 46 #define IMAGE_FILE_MACHINE_SH5 0x01a8 // Hitachi SH5 47 #define IMAGE_FILE_MACHINE_THUMB 0x01c2 // Thumb 48 #define IMAGE_FILE_MACHINE_WCEMIPSV2 0x0169 // MIPS little-endian WCE v2 49 50 51 #define IMAGE_DOS_SIGNATURE 0x5A4D // MZ 52 #define IMAGE_OS2_SIGNATURE 0x454E // NE 53 #define IMAGE_OS2_SIGNATURE_LE 0x454C // LE 54 #define IMAGE_NT_SIGNATURE 0x00004550 // PE00 55 #define OPT_HEADER_MAGIC_PE32 0x010b 56 #define OPT_HEADER_MAGIC_PE32_PLUS 0x020b 57 58 #define IMAGE_FILE_RELOCS_STRIPPED 0x0001 59 #define IMAGE_FILE_EXECUTABLE_IMAGE 0x0002 60 #define IMAGE_FILE_LINE_NUMS_STRIPPED 0x0004 61 #define IMAGE_FILE_LOCAL_SYMS_STRIPPED 0x0008 62 #define IMAGE_FILE_AGGRESSIVE_WS_TRIM 0x0010 63 #define IMAGE_FILE_LARGE_ADDRESS_AWARE 0x0020 64 //#define 0x0040 // Reserved 65 #define IMAGE_FILE_BYTES_REVERSED_LO 0x0080 66 #define IMAGE_FILE_32BIT_MACHINE 0x0100 67 #define IMAGE_FILE_DEBUG_STRIPPED 0x0200 68 #define IMAGE_FILE_REMOVABLE_RUN_FROM_SWAP 0x0400 69 #define IMAGE_FILE_NET_RUN_FROM_SWAP 0x0800 70 #define IMAGE_FILE_SYSTEM 0x1000 71 #define IMAGE_FILE_DLL 0x2000 72 #define IMAGE_FILE_UP_SYSTEM_ONLY 0x4000 73 #define IMAGE_FILE_BYTES_REVERSED_HI 0x8000 74 75 76 // Section Flags 77 // The section flags in the Characteristics field of the section header indicate 78 // characteristics of the section. 79 #define IMAGE_SCN_TYPE_NO_PAD 0x00000008 // The section should not be padded to the next boundary. This flag is obsolete and is replaced by IMAGE_SCN_ALIGN_1BYTES. This is valid only for object files. 80 #define IMAGE_SCN_CNT_CODE 0x00000020 // The section contains executable code. 81 #define IMAGE_SCN_CNT_INITIALIZED_DATA 0x00000040 // The section contains initialized data. 82 #define IMAGE_SCN_CNT_UNINITIALIZED_DATA 0x00000080 // The section contains uninitialized data. 83 #define IMAGE_SCN_LNK_OTHER 0x00000100 // Reserved for future use. 84 #define IMAGE_SCN_LNK_INFO 0x00000200 // The section contains comments or other information. The .drectve section has this type. This is valid for object files only. 85 #define IMAGE_SCN_LNK_REMOVE 0x00000800 // The section will not become part of the image. This is valid only for object files. 86 #define IMAGE_SCN_LNK_COMDAT 0x00001000 // The section contains COMDAT data. For more information, see section 5.5.6, “COMDAT Sections (Object Only).” This is valid only for object files. 87 #define IMAGE_SCN_GPREL 0x00008000 // The section contains data referenced through the global pointer (GP). 88 #define IMAGE_SCN_MEM_PURGEABLE 0x00020000 89 #define IMAGE_SCN_MEM_16BIT 0x00020000 // For ARM machine types, the section contains Thumb code. Reserved for future use with other machine types. 90 #define IMAGE_SCN_MEM_LOCKED 0x00040000 91 #define IMAGE_SCN_MEM_PRELOAD 0x00080000 92 #define IMAGE_SCN_ALIGN_1BYTES 0x00100000 // Align data on a 1-byte boundary. Valid only for object files. 93 #define IMAGE_SCN_ALIGN_2BYTES 0x00200000 // Align data on a 2-byte boundary. Valid only for object files. 94 #define IMAGE_SCN_ALIGN_4BYTES 0x00300000 // Align data on a 4-byte boundary. Valid only for object files. 95 #define IMAGE_SCN_ALIGN_8BYTES 0x00400000 // Align data on an 8-byte boundary. Valid only for object files. 96 #define IMAGE_SCN_ALIGN_16BYTES 0x00500000 // Align data on a 16-byte boundary. Valid only for object files. 97 #define IMAGE_SCN_ALIGN_32BYTES 0x00600000 // Align data on a 32-byte boundary. Valid only for object files. 98 #define IMAGE_SCN_ALIGN_64BYTES 0x00700000 // Align data on a 64-byte boundary. Valid only for object files. 99 #define IMAGE_SCN_ALIGN_128BYTES 0x00800000 // Align data on a 128-byte boundary. Valid only for object files. 100 #define IMAGE_SCN_ALIGN_256BYTES 0x00900000 // Align data on a 256-byte boundary. Valid only for object files. 101 #define IMAGE_SCN_ALIGN_512BYTES 0x00A00000 // Align data on a 512-byte boundary. Valid only for object files. 102 #define IMAGE_SCN_ALIGN_1024BYTES 0x00B00000 // Align data on a 1024-byte boundary. Valid only for object files. 103 #define IMAGE_SCN_ALIGN_2048BYTES 0x00C00000 // Align data on a 2048-byte boundary. Valid only for object files. 104 #define IMAGE_SCN_ALIGN_4096BYTES 0x00D00000 // Align data on a 4096-byte boundary. Valid only for object files. 105 #define IMAGE_SCN_ALIGN_8192BYTES 0x00E00000 // Align data on an 8192-byte boundary. Valid only for object files. 106 #define IMAGE_SCN_LNK_NRELOC_OVFL 0x01000000 // The section contains extended relocations. 107 #define IMAGE_SCN_MEM_DISCARDABLE 0x02000000 // The section can be discarded as needed. 108 #define IMAGE_SCN_MEM_NOT_CACHED 0x04000000 // The section cannot be cached. 109 #define IMAGE_SCN_MEM_NOT_PAGED 0x08000000 // The section is not pageable. 110 #define IMAGE_SCN_MEM_SHARED 0x10000000 // The section can be shared in memory. 111 #define IMAGE_SCN_MEM_EXECUTE 0x20000000 // The section can be executed as code. 112 #define IMAGE_SCN_MEM_READ 0x40000000 // The section can be read. 113 #define IMAGE_SCN_MEM_WRITE 0x80000000 // The section can be written to. 114 115 using namespace lldb; 116 using namespace lldb_private; 117 118 void 119 ObjectFilePECOFF::Initialize() 120 { 121 PluginManager::RegisterPlugin (GetPluginNameStatic(), 122 GetPluginDescriptionStatic(), 123 CreateInstance, 124 CreateMemoryInstance); 125 } 126 127 void 128 ObjectFilePECOFF::Terminate() 129 { 130 PluginManager::UnregisterPlugin (CreateInstance); 131 } 132 133 134 const char * 135 ObjectFilePECOFF::GetPluginNameStatic() 136 { 137 return "object-file.pe-coff"; 138 } 139 140 const char * 141 ObjectFilePECOFF::GetPluginDescriptionStatic() 142 { 143 return "Portable Executable and Common Object File Format object file reader (32 and 64 bit)"; 144 } 145 146 147 ObjectFile * 148 ObjectFilePECOFF::CreateInstance (const lldb::ModuleSP &module_sp, DataBufferSP& dataSP, const FileSpec* file, addr_t offset, addr_t length) 149 { 150 if (ObjectFilePECOFF::MagicBytesMatch(dataSP)) 151 { 152 std::auto_ptr<ObjectFile> objfile_ap(new ObjectFilePECOFF (module_sp, dataSP, file, offset, length)); 153 if (objfile_ap.get() && objfile_ap->ParseHeader()) 154 return objfile_ap.release(); 155 } 156 return NULL; 157 } 158 159 ObjectFile * 160 ObjectFilePECOFF::CreateMemoryInstance (const lldb::ModuleSP &module_sp, 161 lldb::DataBufferSP& data_sp, 162 const lldb::ProcessSP &process_sp, 163 lldb::addr_t header_addr) 164 { 165 return NULL; 166 } 167 168 bool 169 ObjectFilePECOFF::MagicBytesMatch (DataBufferSP& dataSP) 170 { 171 DataExtractor data(dataSP, eByteOrderLittle, 4); 172 uint32_t offset = 0; 173 uint16_t magic = data.GetU16 (&offset); 174 return magic == IMAGE_DOS_SIGNATURE; 175 } 176 177 178 ObjectFilePECOFF::ObjectFilePECOFF (const lldb::ModuleSP &module_sp, 179 DataBufferSP& dataSP, 180 const FileSpec* file, 181 addr_t offset, 182 addr_t length) : 183 ObjectFile (module_sp, file, offset, length, dataSP), 184 m_dos_header (), 185 m_coff_header (), 186 m_coff_header_opt (), 187 m_sect_headers () 188 { 189 ::memset (&m_dos_header, 0, sizeof(m_dos_header)); 190 ::memset (&m_coff_header, 0, sizeof(m_coff_header)); 191 ::memset (&m_coff_header_opt, 0, sizeof(m_coff_header_opt)); 192 } 193 194 195 ObjectFilePECOFF::~ObjectFilePECOFF() 196 { 197 } 198 199 200 bool 201 ObjectFilePECOFF::ParseHeader () 202 { 203 ModuleSP module_sp(GetModule()); 204 if (module_sp) 205 { 206 lldb_private::Mutex::Locker locker(module_sp->GetMutex()); 207 m_sect_headers.clear(); 208 m_data.SetByteOrder (eByteOrderLittle); 209 uint32_t offset = 0; 210 211 if (ParseDOSHeader()) 212 { 213 offset = m_dos_header.e_lfanew; 214 uint32_t pe_signature = m_data.GetU32 (&offset); 215 if (pe_signature != IMAGE_NT_SIGNATURE) 216 return false; 217 if (ParseCOFFHeader(&offset)) 218 { 219 if (m_coff_header.hdrsize > 0) 220 ParseCOFFOptionalHeader(&offset); 221 ParseSectionHeaders (offset); 222 } 223 StreamFile s(stdout, false);// REMOVE THIS LINE!!! 224 Dump(&s);// REMOVE THIS LINE!!! 225 return true; 226 } 227 } 228 return false; 229 } 230 231 232 ByteOrder 233 ObjectFilePECOFF::GetByteOrder () const 234 { 235 return eByteOrderLittle; 236 } 237 238 bool 239 ObjectFilePECOFF::IsExecutable() const 240 { 241 return (m_coff_header.flags & IMAGE_FILE_DLL) == 0; 242 } 243 244 size_t 245 ObjectFilePECOFF::GetAddressByteSize () const 246 { 247 if (m_coff_header_opt.magic == OPT_HEADER_MAGIC_PE32_PLUS) 248 return 8; 249 else if (m_coff_header_opt.magic == OPT_HEADER_MAGIC_PE32) 250 return 4; 251 return 4; 252 } 253 254 //---------------------------------------------------------------------- 255 // NeedsEndianSwap 256 // 257 // Return true if an endian swap needs to occur when extracting data 258 // from this file. 259 //---------------------------------------------------------------------- 260 bool 261 ObjectFilePECOFF::NeedsEndianSwap() const 262 { 263 #if defined(__LITTLE_ENDIAN__) 264 return false; 265 #else 266 return true; 267 #endif 268 } 269 //---------------------------------------------------------------------- 270 // ParseDOSHeader 271 //---------------------------------------------------------------------- 272 bool 273 ObjectFilePECOFF::ParseDOSHeader () 274 { 275 bool success = false; 276 uint32_t offset = 0; 277 success = m_data.ValidOffsetForDataOfSize(0, sizeof(m_dos_header)); 278 279 if (success) 280 { 281 m_dos_header.e_magic = m_data.GetU16(&offset); // Magic number 282 success = m_dos_header.e_magic == IMAGE_DOS_SIGNATURE; 283 284 if (success) 285 { 286 m_dos_header.e_cblp = m_data.GetU16(&offset); // Bytes on last page of file 287 m_dos_header.e_cp = m_data.GetU16(&offset); // Pages in file 288 m_dos_header.e_crlc = m_data.GetU16(&offset); // Relocations 289 m_dos_header.e_cparhdr = m_data.GetU16(&offset); // Size of header in paragraphs 290 m_dos_header.e_minalloc = m_data.GetU16(&offset); // Minimum extra paragraphs needed 291 m_dos_header.e_maxalloc = m_data.GetU16(&offset); // Maximum extra paragraphs needed 292 m_dos_header.e_ss = m_data.GetU16(&offset); // Initial (relative) SS value 293 m_dos_header.e_sp = m_data.GetU16(&offset); // Initial SP value 294 m_dos_header.e_csum = m_data.GetU16(&offset); // Checksum 295 m_dos_header.e_ip = m_data.GetU16(&offset); // Initial IP value 296 m_dos_header.e_cs = m_data.GetU16(&offset); // Initial (relative) CS value 297 m_dos_header.e_lfarlc = m_data.GetU16(&offset); // File address of relocation table 298 m_dos_header.e_ovno = m_data.GetU16(&offset); // Overlay number 299 300 m_dos_header.e_res[0] = m_data.GetU16(&offset); // Reserved words 301 m_dos_header.e_res[1] = m_data.GetU16(&offset); // Reserved words 302 m_dos_header.e_res[2] = m_data.GetU16(&offset); // Reserved words 303 m_dos_header.e_res[3] = m_data.GetU16(&offset); // Reserved words 304 305 m_dos_header.e_oemid = m_data.GetU16(&offset); // OEM identifier (for e_oeminfo) 306 m_dos_header.e_oeminfo = m_data.GetU16(&offset); // OEM information; e_oemid specific 307 m_dos_header.e_res2[0] = m_data.GetU16(&offset); // Reserved words 308 m_dos_header.e_res2[1] = m_data.GetU16(&offset); // Reserved words 309 m_dos_header.e_res2[2] = m_data.GetU16(&offset); // Reserved words 310 m_dos_header.e_res2[3] = m_data.GetU16(&offset); // Reserved words 311 m_dos_header.e_res2[4] = m_data.GetU16(&offset); // Reserved words 312 m_dos_header.e_res2[5] = m_data.GetU16(&offset); // Reserved words 313 m_dos_header.e_res2[6] = m_data.GetU16(&offset); // Reserved words 314 m_dos_header.e_res2[7] = m_data.GetU16(&offset); // Reserved words 315 m_dos_header.e_res2[8] = m_data.GetU16(&offset); // Reserved words 316 m_dos_header.e_res2[9] = m_data.GetU16(&offset); // Reserved words 317 318 m_dos_header.e_lfanew = m_data.GetU32(&offset); // File address of new exe header 319 } 320 } 321 if (!success) 322 memset(&m_dos_header, 0, sizeof(m_dos_header)); 323 return success; 324 } 325 326 327 //---------------------------------------------------------------------- 328 // ParserCOFFHeader 329 //---------------------------------------------------------------------- 330 bool 331 ObjectFilePECOFF::ParseCOFFHeader(uint32_t* offset_ptr) 332 { 333 bool success = m_data.ValidOffsetForDataOfSize (*offset_ptr, sizeof(m_coff_header)); 334 if (success) 335 { 336 m_coff_header.machine = m_data.GetU16(offset_ptr); 337 m_coff_header.nsects = m_data.GetU16(offset_ptr); 338 m_coff_header.modtime = m_data.GetU32(offset_ptr); 339 m_coff_header.symoff = m_data.GetU32(offset_ptr); 340 m_coff_header.nsyms = m_data.GetU32(offset_ptr); 341 m_coff_header.hdrsize = m_data.GetU16(offset_ptr); 342 m_coff_header.flags = m_data.GetU16(offset_ptr); 343 } 344 if (!success) 345 memset(&m_coff_header, 0, sizeof(m_coff_header)); 346 return success; 347 } 348 349 bool 350 ObjectFilePECOFF::ParseCOFFOptionalHeader(uint32_t* offset_ptr) 351 { 352 bool success = false; 353 const uint32_t end_offset = *offset_ptr + m_coff_header.hdrsize; 354 if (*offset_ptr < end_offset) 355 { 356 success = true; 357 m_coff_header_opt.magic = m_data.GetU16(offset_ptr); 358 m_coff_header_opt.major_linker_version = m_data.GetU8 (offset_ptr); 359 m_coff_header_opt.minor_linker_version = m_data.GetU8 (offset_ptr); 360 m_coff_header_opt.code_size = m_data.GetU32(offset_ptr); 361 m_coff_header_opt.data_size = m_data.GetU32(offset_ptr); 362 m_coff_header_opt.bss_size = m_data.GetU32(offset_ptr); 363 m_coff_header_opt.entry = m_data.GetU32(offset_ptr); 364 m_coff_header_opt.code_offset = m_data.GetU32(offset_ptr); 365 366 const uint32_t addr_byte_size = GetAddressByteSize (); 367 368 if (*offset_ptr < end_offset) 369 { 370 if (m_coff_header_opt.magic == OPT_HEADER_MAGIC_PE32) 371 { 372 // PE32 only 373 m_coff_header_opt.data_offset = m_data.GetU32(offset_ptr); 374 } 375 else 376 m_coff_header_opt.data_offset = 0; 377 378 if (*offset_ptr < end_offset) 379 { 380 m_coff_header_opt.image_base = m_data.GetMaxU64 (offset_ptr, addr_byte_size); 381 m_coff_header_opt.sect_alignment = m_data.GetU32(offset_ptr); 382 m_coff_header_opt.file_alignment = m_data.GetU32(offset_ptr); 383 m_coff_header_opt.major_os_system_version = m_data.GetU16(offset_ptr); 384 m_coff_header_opt.minor_os_system_version = m_data.GetU16(offset_ptr); 385 m_coff_header_opt.major_image_version = m_data.GetU16(offset_ptr); 386 m_coff_header_opt.minor_image_version = m_data.GetU16(offset_ptr); 387 m_coff_header_opt.major_subsystem_version = m_data.GetU16(offset_ptr); 388 m_coff_header_opt.minor_subsystem_version = m_data.GetU16(offset_ptr); 389 m_coff_header_opt.reserved1 = m_data.GetU32(offset_ptr); 390 m_coff_header_opt.image_size = m_data.GetU32(offset_ptr); 391 m_coff_header_opt.header_size = m_data.GetU32(offset_ptr); 392 m_coff_header_opt.checksum = m_data.GetU32(offset_ptr); 393 m_coff_header_opt.subsystem = m_data.GetU16(offset_ptr); 394 m_coff_header_opt.dll_flags = m_data.GetU16(offset_ptr); 395 m_coff_header_opt.stack_reserve_size = m_data.GetMaxU64 (offset_ptr, addr_byte_size); 396 m_coff_header_opt.stack_commit_size = m_data.GetMaxU64 (offset_ptr, addr_byte_size); 397 m_coff_header_opt.heap_reserve_size = m_data.GetMaxU64 (offset_ptr, addr_byte_size); 398 m_coff_header_opt.heap_commit_size = m_data.GetMaxU64 (offset_ptr, addr_byte_size); 399 m_coff_header_opt.loader_flags = m_data.GetU32(offset_ptr); 400 uint32_t num_data_dir_entries = m_data.GetU32(offset_ptr); 401 m_coff_header_opt.data_dirs.clear(); 402 m_coff_header_opt.data_dirs.resize(num_data_dir_entries); 403 uint32_t i; 404 for (i=0; i<num_data_dir_entries; i++) 405 { 406 m_coff_header_opt.data_dirs[i].vmaddr = m_data.GetU32(offset_ptr); 407 m_coff_header_opt.data_dirs[i].vmsize = m_data.GetU32(offset_ptr); 408 } 409 } 410 } 411 } 412 // Make sure we are on track for section data which follows 413 *offset_ptr = end_offset; 414 return success; 415 } 416 417 418 //---------------------------------------------------------------------- 419 // ParseSectionHeaders 420 //---------------------------------------------------------------------- 421 bool 422 ObjectFilePECOFF::ParseSectionHeaders (uint32_t section_header_data_offset) 423 { 424 const uint32_t nsects = m_coff_header.nsects; 425 m_sect_headers.clear(); 426 427 if (nsects > 0) 428 { 429 const uint32_t addr_byte_size = GetAddressByteSize (); 430 const size_t section_header_byte_size = nsects * sizeof(section_header_t); 431 DataBufferSP section_header_data_sp(m_file.ReadFileContents (section_header_data_offset, section_header_byte_size)); 432 DataExtractor section_header_data (section_header_data_sp, GetByteOrder(), addr_byte_size); 433 434 uint32_t offset = 0; 435 if (section_header_data.ValidOffsetForDataOfSize (offset, section_header_byte_size)) 436 { 437 m_sect_headers.resize(nsects); 438 439 for (uint32_t idx = 0; idx<nsects; ++idx) 440 { 441 const void *name_data = section_header_data.GetData(&offset, 8); 442 if (name_data) 443 { 444 memcpy(m_sect_headers[idx].name, name_data, 8); 445 m_sect_headers[idx].vmsize = section_header_data.GetU32(&offset); 446 m_sect_headers[idx].vmaddr = section_header_data.GetU32(&offset); 447 m_sect_headers[idx].size = section_header_data.GetU32(&offset); 448 m_sect_headers[idx].offset = section_header_data.GetU32(&offset); 449 m_sect_headers[idx].reloff = section_header_data.GetU32(&offset); 450 m_sect_headers[idx].lineoff = section_header_data.GetU32(&offset); 451 m_sect_headers[idx].nreloc = section_header_data.GetU16(&offset); 452 m_sect_headers[idx].nline = section_header_data.GetU16(&offset); 453 m_sect_headers[idx].flags = section_header_data.GetU32(&offset); 454 } 455 } 456 } 457 } 458 459 return m_sect_headers.empty() == false; 460 } 461 462 bool 463 ObjectFilePECOFF::GetSectionName(std::string& sect_name, const section_header_t& sect) 464 { 465 if (sect.name[0] == '/') 466 { 467 uint32_t stroff = strtoul(§.name[1], NULL, 10); 468 uint32_t string_file_offset = m_coff_header.symoff + (m_coff_header.nsyms * 18) + stroff; 469 const char *name = m_data.GetCStr (&string_file_offset); 470 if (name) 471 { 472 sect_name = name; 473 return true; 474 } 475 476 return false; 477 } 478 sect_name = sect.name; 479 return true; 480 } 481 482 //---------------------------------------------------------------------- 483 // GetNListSymtab 484 //---------------------------------------------------------------------- 485 Symtab * 486 ObjectFilePECOFF::GetSymtab() 487 { 488 ModuleSP module_sp(GetModule()); 489 if (module_sp) 490 { 491 lldb_private::Mutex::Locker locker(module_sp->GetMutex()); 492 if (m_symtab_ap.get() == NULL) 493 { 494 SectionList *sect_list = GetSectionList(); 495 m_symtab_ap.reset(new Symtab(this)); 496 Mutex::Locker symtab_locker (m_symtab_ap->GetMutex()); 497 498 const uint32_t num_syms = m_coff_header.nsyms; 499 500 if (num_syms > 0 && m_coff_header.symoff > 0) 501 { 502 const uint32_t symbol_size = sizeof(section_header_t); 503 const uint32_t addr_byte_size = GetAddressByteSize (); 504 const size_t symbol_data_size = num_syms * symbol_size; 505 // Include the 4 bytes string table size at the end of the symbols 506 DataBufferSP symtab_data_sp(m_file.ReadFileContents (m_coff_header.symoff, symbol_data_size + 4)); 507 DataExtractor symtab_data (symtab_data_sp, GetByteOrder(), addr_byte_size); 508 uint32_t offset = symbol_data_size; 509 const uint32_t strtab_size = symtab_data.GetU32 (&offset); 510 DataBufferSP strtab_data_sp(m_file.ReadFileContents (m_coff_header.symoff + symbol_data_size + 4, strtab_size)); 511 DataExtractor strtab_data (strtab_data_sp, GetByteOrder(), addr_byte_size); 512 513 offset = 0; 514 std::string symbol_name; 515 Symbol *symbols = m_symtab_ap->Resize (num_syms); 516 for (uint32_t i=0; i<num_syms; ++i) 517 { 518 coff_symbol_t symbol; 519 const uint32_t symbol_offset = offset; 520 const char *symbol_name_cstr = NULL; 521 // If the first 4 bytes of the symbol string are zero, then we 522 // it is followed by a 4 byte string table offset. Else these 523 // 8 bytes contain the symbol name 524 if (symtab_data.GetU32 (&offset) == 0) 525 { 526 // Long string that doesn't fit into the symbol table name, 527 // so now we must read the 4 byte string table offset 528 uint32_t strtab_offset = symtab_data.GetU32 (&offset); 529 symbol_name_cstr = strtab_data.PeekCStr (strtab_offset); 530 symbol_name.assign (symbol_name_cstr); 531 } 532 else 533 { 534 // Short string that fits into the symbol table name which is 8 bytes 535 offset += sizeof(symbol.name) - 4; // Skip remaining 536 symbol_name_cstr = symtab_data.PeekCStr (symbol_offset); 537 if (symbol_name_cstr == NULL) 538 break; 539 symbol_name.assign (symbol_name_cstr, sizeof(symbol.name)); 540 } 541 symbol.value = symtab_data.GetU32 (&offset); 542 symbol.sect = symtab_data.GetU16 (&offset); 543 symbol.type = symtab_data.GetU16 (&offset); 544 symbol.storage = symtab_data.GetU8 (&offset); 545 symbol.naux = symtab_data.GetU8 (&offset); 546 Address symbol_addr(sect_list->GetSectionAtIndex(symbol.sect-1), symbol.value); 547 symbols[i].GetMangled ().SetValue (symbol_name.c_str(), symbol_name[0]=='_' && symbol_name[1] == 'Z'); 548 symbols[i].GetAddress() = symbol_addr; 549 550 if (symbol.naux > 0) 551 i += symbol.naux; 552 } 553 554 } 555 } 556 } 557 return m_symtab_ap.get(); 558 559 } 560 561 SectionList * 562 ObjectFilePECOFF::GetSectionList() 563 { 564 ModuleSP module_sp(GetModule()); 565 if (module_sp) 566 { 567 lldb_private::Mutex::Locker locker(module_sp->GetMutex()); 568 if (m_sections_ap.get() == NULL) 569 { 570 m_sections_ap.reset(new SectionList()); 571 const uint32_t nsects = m_sect_headers.size(); 572 ModuleSP module_sp (GetModule()); 573 for (uint32_t idx = 0; idx<nsects; ++idx) 574 { 575 std::string sect_name; 576 GetSectionName (sect_name, m_sect_headers[idx]); 577 ConstString const_sect_name (sect_name.c_str()); 578 static ConstString g_code_sect_name (".code"); 579 static ConstString g_CODE_sect_name ("CODE"); 580 static ConstString g_data_sect_name (".data"); 581 static ConstString g_DATA_sect_name ("DATA"); 582 static ConstString g_bss_sect_name (".bss"); 583 static ConstString g_BSS_sect_name ("BSS"); 584 static ConstString g_debug_sect_name (".debug"); 585 static ConstString g_reloc_sect_name (".reloc"); 586 static ConstString g_stab_sect_name (".stab"); 587 static ConstString g_stabstr_sect_name (".stabstr"); 588 SectionType section_type = eSectionTypeOther; 589 if (m_sect_headers[idx].flags & IMAGE_SCN_CNT_CODE && 590 ((const_sect_name == g_code_sect_name) || (const_sect_name == g_CODE_sect_name))) 591 { 592 section_type = eSectionTypeCode; 593 } 594 else if (m_sect_headers[idx].flags & IMAGE_SCN_CNT_INITIALIZED_DATA && 595 ((const_sect_name == g_data_sect_name) || (const_sect_name == g_DATA_sect_name))) 596 { 597 section_type = eSectionTypeData; 598 } 599 else if (m_sect_headers[idx].flags & IMAGE_SCN_CNT_UNINITIALIZED_DATA && 600 ((const_sect_name == g_bss_sect_name) || (const_sect_name == g_BSS_sect_name))) 601 { 602 if (m_sect_headers[idx].size == 0) 603 section_type = eSectionTypeZeroFill; 604 else 605 section_type = eSectionTypeData; 606 } 607 else if (const_sect_name == g_debug_sect_name) 608 { 609 section_type = eSectionTypeDebug; 610 } 611 else if (const_sect_name == g_stabstr_sect_name) 612 { 613 section_type = eSectionTypeDataCString; 614 } 615 else if (const_sect_name == g_reloc_sect_name) 616 { 617 section_type = eSectionTypeOther; 618 } 619 else if (m_sect_headers[idx].flags & IMAGE_SCN_CNT_CODE) 620 { 621 section_type = eSectionTypeCode; 622 } 623 else if (m_sect_headers[idx].flags & IMAGE_SCN_CNT_INITIALIZED_DATA) 624 { 625 section_type = eSectionTypeData; 626 } 627 else if (m_sect_headers[idx].flags & IMAGE_SCN_CNT_UNINITIALIZED_DATA) 628 { 629 if (m_sect_headers[idx].size == 0) 630 section_type = eSectionTypeZeroFill; 631 else 632 section_type = eSectionTypeData; 633 } 634 635 // Use a segment ID of the segment index shifted left by 8 so they 636 // never conflict with any of the sections. 637 SectionSP section_sp (new Section (module_sp, // Module to which this section belongs 638 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 639 const_sect_name, // Name of this section 640 section_type, // This section is a container of other sections. 641 m_sect_headers[idx].vmaddr, // File VM address == addresses as they are found in the object file 642 m_sect_headers[idx].vmsize, // VM size in bytes of this section 643 m_sect_headers[idx].offset, // Offset to the data for this section in the file 644 m_sect_headers[idx].size, // Size in bytes of this section as found in the the file 645 m_sect_headers[idx].flags)); // Flags for this section 646 647 //section_sp->SetIsEncrypted (segment_is_encrypted); 648 649 m_sections_ap->AddSection(section_sp); 650 } 651 } 652 } 653 return m_sections_ap.get(); 654 } 655 656 bool 657 ObjectFilePECOFF::GetUUID (UUID* uuid) 658 { 659 return false; 660 } 661 662 uint32_t 663 ObjectFilePECOFF::GetDependentModules (FileSpecList& files) 664 { 665 return 0; 666 } 667 668 669 //---------------------------------------------------------------------- 670 // Dump 671 // 672 // Dump the specifics of the runtime file container (such as any headers 673 // segments, sections, etc). 674 //---------------------------------------------------------------------- 675 void 676 ObjectFilePECOFF::Dump(Stream *s) 677 { 678 ModuleSP module_sp(GetModule()); 679 if (module_sp) 680 { 681 lldb_private::Mutex::Locker locker(module_sp->GetMutex()); 682 s->Printf("%p: ", this); 683 s->Indent(); 684 s->PutCString("ObjectFilePECOFF"); 685 686 ArchSpec header_arch; 687 GetArchitecture (header_arch); 688 689 *s << ", file = '" << m_file << "', arch = " << header_arch.GetArchitectureName() << "\n"; 690 691 if (m_sections_ap.get()) 692 m_sections_ap->Dump(s, NULL, true, UINT32_MAX); 693 694 if (m_symtab_ap.get()) 695 m_symtab_ap->Dump(s, NULL, eSortOrderNone); 696 697 if (m_dos_header.e_magic) 698 DumpDOSHeader (s, m_dos_header); 699 if (m_coff_header.machine) 700 { 701 DumpCOFFHeader (s, m_coff_header); 702 if (m_coff_header.hdrsize) 703 DumpOptCOFFHeader (s, m_coff_header_opt); 704 } 705 s->EOL(); 706 DumpSectionHeaders(s); 707 s->EOL(); 708 } 709 } 710 711 //---------------------------------------------------------------------- 712 // DumpDOSHeader 713 // 714 // Dump the MS-DOS header to the specified output stream 715 //---------------------------------------------------------------------- 716 void 717 ObjectFilePECOFF::DumpDOSHeader(Stream *s, const dos_header_t& header) 718 { 719 s->PutCString ("MSDOS Header\n"); 720 s->Printf (" e_magic = 0x%4.4x\n", header.e_magic); 721 s->Printf (" e_cblp = 0x%4.4x\n", header.e_cblp); 722 s->Printf (" e_cp = 0x%4.4x\n", header.e_cp); 723 s->Printf (" e_crlc = 0x%4.4x\n", header.e_crlc); 724 s->Printf (" e_cparhdr = 0x%4.4x\n", header.e_cparhdr); 725 s->Printf (" e_minalloc = 0x%4.4x\n", header.e_minalloc); 726 s->Printf (" e_maxalloc = 0x%4.4x\n", header.e_maxalloc); 727 s->Printf (" e_ss = 0x%4.4x\n", header.e_ss); 728 s->Printf (" e_sp = 0x%4.4x\n", header.e_sp); 729 s->Printf (" e_csum = 0x%4.4x\n", header.e_csum); 730 s->Printf (" e_ip = 0x%4.4x\n", header.e_ip); 731 s->Printf (" e_cs = 0x%4.4x\n", header.e_cs); 732 s->Printf (" e_lfarlc = 0x%4.4x\n", header.e_lfarlc); 733 s->Printf (" e_ovno = 0x%4.4x\n", header.e_ovno); 734 s->Printf (" e_res[4] = { 0x%4.4x, 0x%4.4x, 0x%4.4x, 0x%4.4x }\n", 735 header.e_res[0], 736 header.e_res[1], 737 header.e_res[2], 738 header.e_res[3]); 739 s->Printf (" e_oemid = 0x%4.4x\n", header.e_oemid); 740 s->Printf (" e_oeminfo = 0x%4.4x\n", header.e_oeminfo); 741 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", 742 header.e_res2[0], 743 header.e_res2[1], 744 header.e_res2[2], 745 header.e_res2[3], 746 header.e_res2[4], 747 header.e_res2[5], 748 header.e_res2[6], 749 header.e_res2[7], 750 header.e_res2[8], 751 header.e_res2[9]); 752 s->Printf (" e_lfanew = 0x%8.8x\n", header.e_lfanew); 753 } 754 755 //---------------------------------------------------------------------- 756 // DumpCOFFHeader 757 // 758 // Dump the COFF header to the specified output stream 759 //---------------------------------------------------------------------- 760 void 761 ObjectFilePECOFF::DumpCOFFHeader(Stream *s, const coff_header_t& header) 762 { 763 s->PutCString ("COFF Header\n"); 764 s->Printf (" machine = 0x%4.4x\n", header.machine); 765 s->Printf (" nsects = 0x%4.4x\n", header.nsects); 766 s->Printf (" modtime = 0x%8.8x\n", header.modtime); 767 s->Printf (" symoff = 0x%8.8x\n", header.symoff); 768 s->Printf (" nsyms = 0x%8.8x\n", header.nsyms); 769 s->Printf (" hdrsize = 0x%4.4x\n", header.hdrsize); 770 } 771 772 //---------------------------------------------------------------------- 773 // DumpOptCOFFHeader 774 // 775 // Dump the optional COFF header to the specified output stream 776 //---------------------------------------------------------------------- 777 void 778 ObjectFilePECOFF::DumpOptCOFFHeader(Stream *s, const coff_opt_header_t& header) 779 { 780 s->PutCString ("Optional COFF Header\n"); 781 s->Printf (" magic = 0x%4.4x\n", header.magic); 782 s->Printf (" major_linker_version = 0x%2.2x\n", header.major_linker_version); 783 s->Printf (" minor_linker_version = 0x%2.2x\n", header.minor_linker_version); 784 s->Printf (" code_size = 0x%8.8x\n", header.code_size); 785 s->Printf (" data_size = 0x%8.8x\n", header.data_size); 786 s->Printf (" bss_size = 0x%8.8x\n", header.bss_size); 787 s->Printf (" entry = 0x%8.8x\n", header.entry); 788 s->Printf (" code_offset = 0x%8.8x\n", header.code_offset); 789 s->Printf (" data_offset = 0x%8.8x\n", header.data_offset); 790 s->Printf (" image_base = 0x%16.16llx\n", header.image_base); 791 s->Printf (" sect_alignment = 0x%8.8x\n", header.sect_alignment); 792 s->Printf (" file_alignment = 0x%8.8x\n", header.file_alignment); 793 s->Printf (" major_os_system_version = 0x%4.4x\n", header.major_os_system_version); 794 s->Printf (" minor_os_system_version = 0x%4.4x\n", header.minor_os_system_version); 795 s->Printf (" major_image_version = 0x%4.4x\n", header.major_image_version); 796 s->Printf (" minor_image_version = 0x%4.4x\n", header.minor_image_version); 797 s->Printf (" major_subsystem_version = 0x%4.4x\n", header.major_subsystem_version); 798 s->Printf (" minor_subsystem_version = 0x%4.4x\n", header.minor_subsystem_version); 799 s->Printf (" reserved1 = 0x%8.8x\n", header.reserved1); 800 s->Printf (" image_size = 0x%8.8x\n", header.image_size); 801 s->Printf (" header_size = 0x%8.8x\n", header.header_size); 802 s->Printf (" checksum = 0x%8.8x\n", header.checksum); 803 s->Printf (" subsystem = 0x%4.4x\n", header.subsystem); 804 s->Printf (" dll_flags = 0x%4.4x\n", header.dll_flags); 805 s->Printf (" stack_reserve_size = 0x%16.16llx\n", header.stack_reserve_size); 806 s->Printf (" stack_commit_size = 0x%16.16llx\n", header.stack_commit_size); 807 s->Printf (" heap_reserve_size = 0x%16.16llx\n", header.heap_reserve_size); 808 s->Printf (" heap_commit_size = 0x%16.16llx\n", header.heap_commit_size); 809 s->Printf (" loader_flags = 0x%8.8x\n", header.loader_flags); 810 s->Printf (" num_data_dir_entries = 0x%8.8zx\n", header.data_dirs.size()); 811 uint32_t i; 812 for (i=0; i<header.data_dirs.size(); i++) 813 { 814 s->Printf (" data_dirs[%2u] vmaddr = 0x%8.8x, vmsize = 0x%8.8x\n", 815 i, 816 header.data_dirs[i].vmaddr, 817 header.data_dirs[i].vmsize); 818 } 819 } 820 //---------------------------------------------------------------------- 821 // DumpSectionHeader 822 // 823 // Dump a single ELF section header to the specified output stream 824 //---------------------------------------------------------------------- 825 void 826 ObjectFilePECOFF::DumpSectionHeader(Stream *s, const section_header_t& sh) 827 { 828 std::string name; 829 GetSectionName(name, sh); 830 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", 831 name.c_str(), 832 sh.vmaddr, 833 sh.vmsize, 834 sh.offset, 835 sh.size, 836 sh.reloff, 837 sh.lineoff, 838 sh.nreloc, 839 sh.nline, 840 sh.flags); 841 } 842 843 844 //---------------------------------------------------------------------- 845 // DumpSectionHeaders 846 // 847 // Dump all of the ELF section header to the specified output stream 848 //---------------------------------------------------------------------- 849 void 850 ObjectFilePECOFF::DumpSectionHeaders(Stream *s) 851 { 852 853 s->PutCString ("Section Headers\n"); 854 s->PutCString ("IDX name vm addr vm size file off file size reloc off line off nreloc nline flags\n"); 855 s->PutCString ("==== ---------------- ---------- ---------- ---------- ---------- ---------- ---------- ------ ------ ----------\n"); 856 857 uint32_t idx = 0; 858 SectionHeaderCollIter pos, end = m_sect_headers.end(); 859 860 for (pos = m_sect_headers.begin(); pos != end; ++pos, ++idx) 861 { 862 s->Printf ("[%2u] ", idx); 863 ObjectFilePECOFF::DumpSectionHeader(s, *pos); 864 } 865 } 866 867 static bool 868 COFFMachineToMachCPU (uint16_t machine, ArchSpec &arch) 869 { 870 switch (machine) 871 { 872 case IMAGE_FILE_MACHINE_AMD64: 873 case IMAGE_FILE_MACHINE_IA64: 874 arch.SetArchitecture (eArchTypeMachO, 875 llvm::MachO::CPUTypeX86_64, 876 llvm::MachO::CPUSubType_X86_64_ALL); 877 return true; 878 879 case IMAGE_FILE_MACHINE_I386: 880 arch.SetArchitecture (eArchTypeMachO, 881 llvm::MachO::CPUTypeI386, 882 llvm::MachO::CPUSubType_I386_ALL); 883 return true; 884 885 case IMAGE_FILE_MACHINE_POWERPC: 886 case IMAGE_FILE_MACHINE_POWERPCFP: 887 arch.SetArchitecture (eArchTypeMachO, 888 llvm::MachO::CPUTypePowerPC, 889 llvm::MachO::CPUSubType_POWERPC_ALL); 890 return true; 891 case IMAGE_FILE_MACHINE_ARM: 892 case IMAGE_FILE_MACHINE_THUMB: 893 arch.SetArchitecture (eArchTypeMachO, 894 llvm::MachO::CPUTypeARM, 895 llvm::MachO::CPUSubType_ARM_V7); 896 return true; 897 } 898 return false; 899 } 900 bool 901 ObjectFilePECOFF::GetArchitecture (ArchSpec &arch) 902 { 903 // For index zero return our cpu type 904 return COFFMachineToMachCPU (m_coff_header.machine, arch); 905 } 906 907 ObjectFile::Type 908 ObjectFilePECOFF::CalculateType() 909 { 910 if (m_coff_header.machine != 0) 911 { 912 if ((m_coff_header.flags & IMAGE_FILE_DLL) == 0) 913 return eTypeExecutable; 914 else 915 return eTypeSharedLibrary; 916 } 917 return eTypeExecutable; 918 } 919 920 ObjectFile::Strata 921 ObjectFilePECOFF::CalculateStrata() 922 { 923 return eStrataUser; 924 } 925 //------------------------------------------------------------------ 926 // PluginInterface protocol 927 //------------------------------------------------------------------ 928 const char * 929 ObjectFilePECOFF::GetPluginName() 930 { 931 return "ObjectFilePECOFF"; 932 } 933 934 const char * 935 ObjectFilePECOFF::GetShortPluginName() 936 { 937 return GetPluginNameStatic(); 938 } 939 940 uint32_t 941 ObjectFilePECOFF::GetPluginVersion() 942 { 943 return 1; 944 } 945 946