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, 149 DataBufferSP& data_sp, 150 lldb::offset_t data_offset, 151 const lldb_private::FileSpec* file, 152 lldb::offset_t file_offset, 153 lldb::offset_t length) 154 { 155 if (!data_sp) 156 { 157 data_sp = file->MemoryMapFileContents(file_offset, length); 158 data_offset = 0; 159 } 160 161 if (ObjectFilePECOFF::MagicBytesMatch(data_sp)) 162 { 163 // Update the data to contain the entire file if it doesn't already 164 if (data_sp->GetByteSize() < length) 165 data_sp = file->MemoryMapFileContents(file_offset, length); 166 std::auto_ptr<ObjectFile> objfile_ap(new ObjectFilePECOFF (module_sp, data_sp, data_offset, file, file_offset, length)); 167 if (objfile_ap.get() && objfile_ap->ParseHeader()) 168 return objfile_ap.release(); 169 } 170 return NULL; 171 } 172 173 ObjectFile * 174 ObjectFilePECOFF::CreateMemoryInstance (const lldb::ModuleSP &module_sp, 175 lldb::DataBufferSP& data_sp, 176 const lldb::ProcessSP &process_sp, 177 lldb::addr_t header_addr) 178 { 179 return NULL; 180 } 181 182 bool 183 ObjectFilePECOFF::MagicBytesMatch (DataBufferSP& data_sp) 184 { 185 DataExtractor data(data_sp, eByteOrderLittle, 4); 186 lldb::offset_t offset = 0; 187 uint16_t magic = data.GetU16 (&offset); 188 return magic == IMAGE_DOS_SIGNATURE; 189 } 190 191 192 ObjectFilePECOFF::ObjectFilePECOFF (const lldb::ModuleSP &module_sp, 193 DataBufferSP& data_sp, 194 lldb::offset_t data_offset, 195 const FileSpec* file, 196 lldb::offset_t file_offset, 197 lldb::offset_t length) : 198 ObjectFile (module_sp, file, file_offset, length, data_sp, data_offset), 199 m_dos_header (), 200 m_coff_header (), 201 m_coff_header_opt (), 202 m_sect_headers () 203 { 204 ::memset (&m_dos_header, 0, sizeof(m_dos_header)); 205 ::memset (&m_coff_header, 0, sizeof(m_coff_header)); 206 ::memset (&m_coff_header_opt, 0, sizeof(m_coff_header_opt)); 207 } 208 209 210 ObjectFilePECOFF::~ObjectFilePECOFF() 211 { 212 } 213 214 215 bool 216 ObjectFilePECOFF::ParseHeader () 217 { 218 ModuleSP module_sp(GetModule()); 219 if (module_sp) 220 { 221 lldb_private::Mutex::Locker locker(module_sp->GetMutex()); 222 m_sect_headers.clear(); 223 m_data.SetByteOrder (eByteOrderLittle); 224 lldb::offset_t offset = 0; 225 226 if (ParseDOSHeader()) 227 { 228 offset = m_dos_header.e_lfanew; 229 uint32_t pe_signature = m_data.GetU32 (&offset); 230 if (pe_signature != IMAGE_NT_SIGNATURE) 231 return false; 232 if (ParseCOFFHeader(&offset)) 233 { 234 if (m_coff_header.hdrsize > 0) 235 ParseCOFFOptionalHeader(&offset); 236 ParseSectionHeaders (offset); 237 } 238 return true; 239 } 240 } 241 return false; 242 } 243 244 245 ByteOrder 246 ObjectFilePECOFF::GetByteOrder () const 247 { 248 return eByteOrderLittle; 249 } 250 251 bool 252 ObjectFilePECOFF::IsExecutable() const 253 { 254 return (m_coff_header.flags & IMAGE_FILE_DLL) == 0; 255 } 256 257 uint32_t 258 ObjectFilePECOFF::GetAddressByteSize () const 259 { 260 if (m_coff_header_opt.magic == OPT_HEADER_MAGIC_PE32_PLUS) 261 return 8; 262 else if (m_coff_header_opt.magic == OPT_HEADER_MAGIC_PE32) 263 return 4; 264 return 4; 265 } 266 267 //---------------------------------------------------------------------- 268 // NeedsEndianSwap 269 // 270 // Return true if an endian swap needs to occur when extracting data 271 // from this file. 272 //---------------------------------------------------------------------- 273 bool 274 ObjectFilePECOFF::NeedsEndianSwap() const 275 { 276 #if defined(__LITTLE_ENDIAN__) 277 return false; 278 #else 279 return true; 280 #endif 281 } 282 //---------------------------------------------------------------------- 283 // ParseDOSHeader 284 //---------------------------------------------------------------------- 285 bool 286 ObjectFilePECOFF::ParseDOSHeader () 287 { 288 bool success = false; 289 lldb::offset_t offset = 0; 290 success = m_data.ValidOffsetForDataOfSize(0, sizeof(m_dos_header)); 291 292 if (success) 293 { 294 m_dos_header.e_magic = m_data.GetU16(&offset); // Magic number 295 success = m_dos_header.e_magic == IMAGE_DOS_SIGNATURE; 296 297 if (success) 298 { 299 m_dos_header.e_cblp = m_data.GetU16(&offset); // Bytes on last page of file 300 m_dos_header.e_cp = m_data.GetU16(&offset); // Pages in file 301 m_dos_header.e_crlc = m_data.GetU16(&offset); // Relocations 302 m_dos_header.e_cparhdr = m_data.GetU16(&offset); // Size of header in paragraphs 303 m_dos_header.e_minalloc = m_data.GetU16(&offset); // Minimum extra paragraphs needed 304 m_dos_header.e_maxalloc = m_data.GetU16(&offset); // Maximum extra paragraphs needed 305 m_dos_header.e_ss = m_data.GetU16(&offset); // Initial (relative) SS value 306 m_dos_header.e_sp = m_data.GetU16(&offset); // Initial SP value 307 m_dos_header.e_csum = m_data.GetU16(&offset); // Checksum 308 m_dos_header.e_ip = m_data.GetU16(&offset); // Initial IP value 309 m_dos_header.e_cs = m_data.GetU16(&offset); // Initial (relative) CS value 310 m_dos_header.e_lfarlc = m_data.GetU16(&offset); // File address of relocation table 311 m_dos_header.e_ovno = m_data.GetU16(&offset); // Overlay number 312 313 m_dos_header.e_res[0] = m_data.GetU16(&offset); // Reserved words 314 m_dos_header.e_res[1] = m_data.GetU16(&offset); // Reserved words 315 m_dos_header.e_res[2] = m_data.GetU16(&offset); // Reserved words 316 m_dos_header.e_res[3] = m_data.GetU16(&offset); // Reserved words 317 318 m_dos_header.e_oemid = m_data.GetU16(&offset); // OEM identifier (for e_oeminfo) 319 m_dos_header.e_oeminfo = m_data.GetU16(&offset); // OEM information; e_oemid specific 320 m_dos_header.e_res2[0] = m_data.GetU16(&offset); // Reserved words 321 m_dos_header.e_res2[1] = m_data.GetU16(&offset); // Reserved words 322 m_dos_header.e_res2[2] = m_data.GetU16(&offset); // Reserved words 323 m_dos_header.e_res2[3] = m_data.GetU16(&offset); // Reserved words 324 m_dos_header.e_res2[4] = m_data.GetU16(&offset); // Reserved words 325 m_dos_header.e_res2[5] = m_data.GetU16(&offset); // Reserved words 326 m_dos_header.e_res2[6] = m_data.GetU16(&offset); // Reserved words 327 m_dos_header.e_res2[7] = m_data.GetU16(&offset); // Reserved words 328 m_dos_header.e_res2[8] = m_data.GetU16(&offset); // Reserved words 329 m_dos_header.e_res2[9] = m_data.GetU16(&offset); // Reserved words 330 331 m_dos_header.e_lfanew = m_data.GetU32(&offset); // File address of new exe header 332 } 333 } 334 if (!success) 335 memset(&m_dos_header, 0, sizeof(m_dos_header)); 336 return success; 337 } 338 339 340 //---------------------------------------------------------------------- 341 // ParserCOFFHeader 342 //---------------------------------------------------------------------- 343 bool 344 ObjectFilePECOFF::ParseCOFFHeader(lldb::offset_t *offset_ptr) 345 { 346 bool success = m_data.ValidOffsetForDataOfSize (*offset_ptr, sizeof(m_coff_header)); 347 if (success) 348 { 349 m_coff_header.machine = m_data.GetU16(offset_ptr); 350 m_coff_header.nsects = m_data.GetU16(offset_ptr); 351 m_coff_header.modtime = m_data.GetU32(offset_ptr); 352 m_coff_header.symoff = m_data.GetU32(offset_ptr); 353 m_coff_header.nsyms = m_data.GetU32(offset_ptr); 354 m_coff_header.hdrsize = m_data.GetU16(offset_ptr); 355 m_coff_header.flags = m_data.GetU16(offset_ptr); 356 } 357 if (!success) 358 memset(&m_coff_header, 0, sizeof(m_coff_header)); 359 return success; 360 } 361 362 bool 363 ObjectFilePECOFF::ParseCOFFOptionalHeader(lldb::offset_t *offset_ptr) 364 { 365 bool success = false; 366 const lldb::offset_t end_offset = *offset_ptr + m_coff_header.hdrsize; 367 if (*offset_ptr < end_offset) 368 { 369 success = true; 370 m_coff_header_opt.magic = m_data.GetU16(offset_ptr); 371 m_coff_header_opt.major_linker_version = m_data.GetU8 (offset_ptr); 372 m_coff_header_opt.minor_linker_version = m_data.GetU8 (offset_ptr); 373 m_coff_header_opt.code_size = m_data.GetU32(offset_ptr); 374 m_coff_header_opt.data_size = m_data.GetU32(offset_ptr); 375 m_coff_header_opt.bss_size = m_data.GetU32(offset_ptr); 376 m_coff_header_opt.entry = m_data.GetU32(offset_ptr); 377 m_coff_header_opt.code_offset = m_data.GetU32(offset_ptr); 378 379 const uint32_t addr_byte_size = GetAddressByteSize (); 380 381 if (*offset_ptr < end_offset) 382 { 383 if (m_coff_header_opt.magic == OPT_HEADER_MAGIC_PE32) 384 { 385 // PE32 only 386 m_coff_header_opt.data_offset = m_data.GetU32(offset_ptr); 387 } 388 else 389 m_coff_header_opt.data_offset = 0; 390 391 if (*offset_ptr < end_offset) 392 { 393 m_coff_header_opt.image_base = m_data.GetMaxU64 (offset_ptr, addr_byte_size); 394 m_coff_header_opt.sect_alignment = m_data.GetU32(offset_ptr); 395 m_coff_header_opt.file_alignment = m_data.GetU32(offset_ptr); 396 m_coff_header_opt.major_os_system_version = m_data.GetU16(offset_ptr); 397 m_coff_header_opt.minor_os_system_version = m_data.GetU16(offset_ptr); 398 m_coff_header_opt.major_image_version = m_data.GetU16(offset_ptr); 399 m_coff_header_opt.minor_image_version = m_data.GetU16(offset_ptr); 400 m_coff_header_opt.major_subsystem_version = m_data.GetU16(offset_ptr); 401 m_coff_header_opt.minor_subsystem_version = m_data.GetU16(offset_ptr); 402 m_coff_header_opt.reserved1 = m_data.GetU32(offset_ptr); 403 m_coff_header_opt.image_size = m_data.GetU32(offset_ptr); 404 m_coff_header_opt.header_size = m_data.GetU32(offset_ptr); 405 m_coff_header_opt.checksum = m_data.GetU32(offset_ptr); 406 m_coff_header_opt.subsystem = m_data.GetU16(offset_ptr); 407 m_coff_header_opt.dll_flags = m_data.GetU16(offset_ptr); 408 m_coff_header_opt.stack_reserve_size = m_data.GetMaxU64 (offset_ptr, addr_byte_size); 409 m_coff_header_opt.stack_commit_size = m_data.GetMaxU64 (offset_ptr, addr_byte_size); 410 m_coff_header_opt.heap_reserve_size = m_data.GetMaxU64 (offset_ptr, addr_byte_size); 411 m_coff_header_opt.heap_commit_size = m_data.GetMaxU64 (offset_ptr, addr_byte_size); 412 m_coff_header_opt.loader_flags = m_data.GetU32(offset_ptr); 413 uint32_t num_data_dir_entries = m_data.GetU32(offset_ptr); 414 m_coff_header_opt.data_dirs.clear(); 415 m_coff_header_opt.data_dirs.resize(num_data_dir_entries); 416 uint32_t i; 417 for (i=0; i<num_data_dir_entries; i++) 418 { 419 m_coff_header_opt.data_dirs[i].vmaddr = m_data.GetU32(offset_ptr); 420 m_coff_header_opt.data_dirs[i].vmsize = m_data.GetU32(offset_ptr); 421 } 422 } 423 } 424 } 425 // Make sure we are on track for section data which follows 426 *offset_ptr = end_offset; 427 return success; 428 } 429 430 431 //---------------------------------------------------------------------- 432 // ParseSectionHeaders 433 //---------------------------------------------------------------------- 434 bool 435 ObjectFilePECOFF::ParseSectionHeaders (uint32_t section_header_data_offset) 436 { 437 const uint32_t nsects = m_coff_header.nsects; 438 m_sect_headers.clear(); 439 440 if (nsects > 0) 441 { 442 const uint32_t addr_byte_size = GetAddressByteSize (); 443 const size_t section_header_byte_size = nsects * sizeof(section_header_t); 444 DataBufferSP section_header_data_sp(m_file.ReadFileContents (section_header_data_offset, section_header_byte_size)); 445 DataExtractor section_header_data (section_header_data_sp, GetByteOrder(), addr_byte_size); 446 447 lldb::offset_t offset = 0; 448 if (section_header_data.ValidOffsetForDataOfSize (offset, section_header_byte_size)) 449 { 450 m_sect_headers.resize(nsects); 451 452 for (uint32_t idx = 0; idx<nsects; ++idx) 453 { 454 const void *name_data = section_header_data.GetData(&offset, 8); 455 if (name_data) 456 { 457 memcpy(m_sect_headers[idx].name, name_data, 8); 458 m_sect_headers[idx].vmsize = section_header_data.GetU32(&offset); 459 m_sect_headers[idx].vmaddr = section_header_data.GetU32(&offset); 460 m_sect_headers[idx].size = section_header_data.GetU32(&offset); 461 m_sect_headers[idx].offset = section_header_data.GetU32(&offset); 462 m_sect_headers[idx].reloff = section_header_data.GetU32(&offset); 463 m_sect_headers[idx].lineoff = section_header_data.GetU32(&offset); 464 m_sect_headers[idx].nreloc = section_header_data.GetU16(&offset); 465 m_sect_headers[idx].nline = section_header_data.GetU16(&offset); 466 m_sect_headers[idx].flags = section_header_data.GetU32(&offset); 467 } 468 } 469 } 470 } 471 472 return m_sect_headers.empty() == false; 473 } 474 475 bool 476 ObjectFilePECOFF::GetSectionName(std::string& sect_name, const section_header_t& sect) 477 { 478 if (sect.name[0] == '/') 479 { 480 lldb::offset_t stroff = strtoul(§.name[1], NULL, 10); 481 lldb::offset_t string_file_offset = m_coff_header.symoff + (m_coff_header.nsyms * 18) + stroff; 482 const char *name = m_data.GetCStr (&string_file_offset); 483 if (name) 484 { 485 sect_name = name; 486 return true; 487 } 488 489 return false; 490 } 491 sect_name = sect.name; 492 return true; 493 } 494 495 //---------------------------------------------------------------------- 496 // GetNListSymtab 497 //---------------------------------------------------------------------- 498 Symtab * 499 ObjectFilePECOFF::GetSymtab() 500 { 501 ModuleSP module_sp(GetModule()); 502 if (module_sp) 503 { 504 lldb_private::Mutex::Locker locker(module_sp->GetMutex()); 505 if (m_symtab_ap.get() == NULL) 506 { 507 SectionList *sect_list = GetSectionList(); 508 m_symtab_ap.reset(new Symtab(this)); 509 Mutex::Locker symtab_locker (m_symtab_ap->GetMutex()); 510 511 const uint32_t num_syms = m_coff_header.nsyms; 512 513 if (num_syms > 0 && m_coff_header.symoff > 0) 514 { 515 const uint32_t symbol_size = sizeof(section_header_t); 516 const uint32_t addr_byte_size = GetAddressByteSize (); 517 const size_t symbol_data_size = num_syms * symbol_size; 518 // Include the 4 bytes string table size at the end of the symbols 519 DataBufferSP symtab_data_sp(m_file.ReadFileContents (m_coff_header.symoff, symbol_data_size + 4)); 520 DataExtractor symtab_data (symtab_data_sp, GetByteOrder(), addr_byte_size); 521 lldb::offset_t offset = symbol_data_size; 522 const uint32_t strtab_size = symtab_data.GetU32 (&offset); 523 DataBufferSP strtab_data_sp(m_file.ReadFileContents (m_coff_header.symoff + symbol_data_size + 4, strtab_size)); 524 DataExtractor strtab_data (strtab_data_sp, GetByteOrder(), addr_byte_size); 525 526 offset = 0; 527 std::string symbol_name; 528 Symbol *symbols = m_symtab_ap->Resize (num_syms); 529 for (uint32_t i=0; i<num_syms; ++i) 530 { 531 coff_symbol_t symbol; 532 const uint32_t symbol_offset = offset; 533 const char *symbol_name_cstr = NULL; 534 // If the first 4 bytes of the symbol string are zero, then we 535 // it is followed by a 4 byte string table offset. Else these 536 // 8 bytes contain the symbol name 537 if (symtab_data.GetU32 (&offset) == 0) 538 { 539 // Long string that doesn't fit into the symbol table name, 540 // so now we must read the 4 byte string table offset 541 uint32_t strtab_offset = symtab_data.GetU32 (&offset); 542 symbol_name_cstr = strtab_data.PeekCStr (strtab_offset); 543 symbol_name.assign (symbol_name_cstr); 544 } 545 else 546 { 547 // Short string that fits into the symbol table name which is 8 bytes 548 offset += sizeof(symbol.name) - 4; // Skip remaining 549 symbol_name_cstr = symtab_data.PeekCStr (symbol_offset); 550 if (symbol_name_cstr == NULL) 551 break; 552 symbol_name.assign (symbol_name_cstr, sizeof(symbol.name)); 553 } 554 symbol.value = symtab_data.GetU32 (&offset); 555 symbol.sect = symtab_data.GetU16 (&offset); 556 symbol.type = symtab_data.GetU16 (&offset); 557 symbol.storage = symtab_data.GetU8 (&offset); 558 symbol.naux = symtab_data.GetU8 (&offset); 559 Address symbol_addr(sect_list->GetSectionAtIndex(symbol.sect-1), symbol.value); 560 symbols[i].GetMangled ().SetValue (ConstString(symbol_name.c_str())); 561 symbols[i].GetAddress() = symbol_addr; 562 563 if (symbol.naux > 0) 564 i += symbol.naux; 565 } 566 567 } 568 } 569 } 570 return m_symtab_ap.get(); 571 572 } 573 574 SectionList * 575 ObjectFilePECOFF::GetSectionList() 576 { 577 ModuleSP module_sp(GetModule()); 578 if (module_sp) 579 { 580 lldb_private::Mutex::Locker locker(module_sp->GetMutex()); 581 if (m_sections_ap.get() == NULL) 582 { 583 m_sections_ap.reset(new SectionList()); 584 const uint32_t nsects = m_sect_headers.size(); 585 ModuleSP module_sp (GetModule()); 586 for (uint32_t idx = 0; idx<nsects; ++idx) 587 { 588 std::string sect_name; 589 GetSectionName (sect_name, m_sect_headers[idx]); 590 ConstString const_sect_name (sect_name.c_str()); 591 static ConstString g_code_sect_name (".code"); 592 static ConstString g_CODE_sect_name ("CODE"); 593 static ConstString g_data_sect_name (".data"); 594 static ConstString g_DATA_sect_name ("DATA"); 595 static ConstString g_bss_sect_name (".bss"); 596 static ConstString g_BSS_sect_name ("BSS"); 597 static ConstString g_debug_sect_name (".debug"); 598 static ConstString g_reloc_sect_name (".reloc"); 599 static ConstString g_stab_sect_name (".stab"); 600 static ConstString g_stabstr_sect_name (".stabstr"); 601 SectionType section_type = eSectionTypeOther; 602 if (m_sect_headers[idx].flags & IMAGE_SCN_CNT_CODE && 603 ((const_sect_name == g_code_sect_name) || (const_sect_name == g_CODE_sect_name))) 604 { 605 section_type = eSectionTypeCode; 606 } 607 else if (m_sect_headers[idx].flags & IMAGE_SCN_CNT_INITIALIZED_DATA && 608 ((const_sect_name == g_data_sect_name) || (const_sect_name == g_DATA_sect_name))) 609 { 610 section_type = eSectionTypeData; 611 } 612 else if (m_sect_headers[idx].flags & IMAGE_SCN_CNT_UNINITIALIZED_DATA && 613 ((const_sect_name == g_bss_sect_name) || (const_sect_name == g_BSS_sect_name))) 614 { 615 if (m_sect_headers[idx].size == 0) 616 section_type = eSectionTypeZeroFill; 617 else 618 section_type = eSectionTypeData; 619 } 620 else if (const_sect_name == g_debug_sect_name) 621 { 622 section_type = eSectionTypeDebug; 623 } 624 else if (const_sect_name == g_stabstr_sect_name) 625 { 626 section_type = eSectionTypeDataCString; 627 } 628 else if (const_sect_name == g_reloc_sect_name) 629 { 630 section_type = eSectionTypeOther; 631 } 632 else if (m_sect_headers[idx].flags & IMAGE_SCN_CNT_CODE) 633 { 634 section_type = eSectionTypeCode; 635 } 636 else if (m_sect_headers[idx].flags & IMAGE_SCN_CNT_INITIALIZED_DATA) 637 { 638 section_type = eSectionTypeData; 639 } 640 else if (m_sect_headers[idx].flags & IMAGE_SCN_CNT_UNINITIALIZED_DATA) 641 { 642 if (m_sect_headers[idx].size == 0) 643 section_type = eSectionTypeZeroFill; 644 else 645 section_type = eSectionTypeData; 646 } 647 648 // Use a segment ID of the segment index shifted left by 8 so they 649 // never conflict with any of the sections. 650 SectionSP section_sp (new Section (module_sp, // Module to which this section belongs 651 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 652 const_sect_name, // Name of this section 653 section_type, // This section is a container of other sections. 654 m_sect_headers[idx].vmaddr, // File VM address == addresses as they are found in the object file 655 m_sect_headers[idx].vmsize, // VM size in bytes of this section 656 m_sect_headers[idx].offset, // Offset to the data for this section in the file 657 m_sect_headers[idx].size, // Size in bytes of this section as found in the the file 658 m_sect_headers[idx].flags)); // Flags for this section 659 660 //section_sp->SetIsEncrypted (segment_is_encrypted); 661 662 m_sections_ap->AddSection(section_sp); 663 } 664 665 m_sections_ap->Finalize(); // Now that we're done adding sections, finalize to build fast-lookup caches 666 } 667 } 668 return m_sections_ap.get(); 669 } 670 671 bool 672 ObjectFilePECOFF::GetUUID (UUID* uuid) 673 { 674 return false; 675 } 676 677 uint32_t 678 ObjectFilePECOFF::GetDependentModules (FileSpecList& files) 679 { 680 return 0; 681 } 682 683 684 //---------------------------------------------------------------------- 685 // Dump 686 // 687 // Dump the specifics of the runtime file container (such as any headers 688 // segments, sections, etc). 689 //---------------------------------------------------------------------- 690 void 691 ObjectFilePECOFF::Dump(Stream *s) 692 { 693 ModuleSP module_sp(GetModule()); 694 if (module_sp) 695 { 696 lldb_private::Mutex::Locker locker(module_sp->GetMutex()); 697 s->Printf("%p: ", this); 698 s->Indent(); 699 s->PutCString("ObjectFilePECOFF"); 700 701 ArchSpec header_arch; 702 GetArchitecture (header_arch); 703 704 *s << ", file = '" << m_file << "', arch = " << header_arch.GetArchitectureName() << "\n"; 705 706 if (m_sections_ap.get()) 707 m_sections_ap->Dump(s, NULL, true, UINT32_MAX); 708 709 if (m_symtab_ap.get()) 710 m_symtab_ap->Dump(s, NULL, eSortOrderNone); 711 712 if (m_dos_header.e_magic) 713 DumpDOSHeader (s, m_dos_header); 714 if (m_coff_header.machine) 715 { 716 DumpCOFFHeader (s, m_coff_header); 717 if (m_coff_header.hdrsize) 718 DumpOptCOFFHeader (s, m_coff_header_opt); 719 } 720 s->EOL(); 721 DumpSectionHeaders(s); 722 s->EOL(); 723 } 724 } 725 726 //---------------------------------------------------------------------- 727 // DumpDOSHeader 728 // 729 // Dump the MS-DOS header to the specified output stream 730 //---------------------------------------------------------------------- 731 void 732 ObjectFilePECOFF::DumpDOSHeader(Stream *s, const dos_header_t& header) 733 { 734 s->PutCString ("MSDOS Header\n"); 735 s->Printf (" e_magic = 0x%4.4x\n", header.e_magic); 736 s->Printf (" e_cblp = 0x%4.4x\n", header.e_cblp); 737 s->Printf (" e_cp = 0x%4.4x\n", header.e_cp); 738 s->Printf (" e_crlc = 0x%4.4x\n", header.e_crlc); 739 s->Printf (" e_cparhdr = 0x%4.4x\n", header.e_cparhdr); 740 s->Printf (" e_minalloc = 0x%4.4x\n", header.e_minalloc); 741 s->Printf (" e_maxalloc = 0x%4.4x\n", header.e_maxalloc); 742 s->Printf (" e_ss = 0x%4.4x\n", header.e_ss); 743 s->Printf (" e_sp = 0x%4.4x\n", header.e_sp); 744 s->Printf (" e_csum = 0x%4.4x\n", header.e_csum); 745 s->Printf (" e_ip = 0x%4.4x\n", header.e_ip); 746 s->Printf (" e_cs = 0x%4.4x\n", header.e_cs); 747 s->Printf (" e_lfarlc = 0x%4.4x\n", header.e_lfarlc); 748 s->Printf (" e_ovno = 0x%4.4x\n", header.e_ovno); 749 s->Printf (" e_res[4] = { 0x%4.4x, 0x%4.4x, 0x%4.4x, 0x%4.4x }\n", 750 header.e_res[0], 751 header.e_res[1], 752 header.e_res[2], 753 header.e_res[3]); 754 s->Printf (" e_oemid = 0x%4.4x\n", header.e_oemid); 755 s->Printf (" e_oeminfo = 0x%4.4x\n", header.e_oeminfo); 756 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", 757 header.e_res2[0], 758 header.e_res2[1], 759 header.e_res2[2], 760 header.e_res2[3], 761 header.e_res2[4], 762 header.e_res2[5], 763 header.e_res2[6], 764 header.e_res2[7], 765 header.e_res2[8], 766 header.e_res2[9]); 767 s->Printf (" e_lfanew = 0x%8.8x\n", header.e_lfanew); 768 } 769 770 //---------------------------------------------------------------------- 771 // DumpCOFFHeader 772 // 773 // Dump the COFF header to the specified output stream 774 //---------------------------------------------------------------------- 775 void 776 ObjectFilePECOFF::DumpCOFFHeader(Stream *s, const coff_header_t& header) 777 { 778 s->PutCString ("COFF Header\n"); 779 s->Printf (" machine = 0x%4.4x\n", header.machine); 780 s->Printf (" nsects = 0x%4.4x\n", header.nsects); 781 s->Printf (" modtime = 0x%8.8x\n", header.modtime); 782 s->Printf (" symoff = 0x%8.8x\n", header.symoff); 783 s->Printf (" nsyms = 0x%8.8x\n", header.nsyms); 784 s->Printf (" hdrsize = 0x%4.4x\n", header.hdrsize); 785 } 786 787 //---------------------------------------------------------------------- 788 // DumpOptCOFFHeader 789 // 790 // Dump the optional COFF header to the specified output stream 791 //---------------------------------------------------------------------- 792 void 793 ObjectFilePECOFF::DumpOptCOFFHeader(Stream *s, const coff_opt_header_t& header) 794 { 795 s->PutCString ("Optional COFF Header\n"); 796 s->Printf (" magic = 0x%4.4x\n", header.magic); 797 s->Printf (" major_linker_version = 0x%2.2x\n", header.major_linker_version); 798 s->Printf (" minor_linker_version = 0x%2.2x\n", header.minor_linker_version); 799 s->Printf (" code_size = 0x%8.8x\n", header.code_size); 800 s->Printf (" data_size = 0x%8.8x\n", header.data_size); 801 s->Printf (" bss_size = 0x%8.8x\n", header.bss_size); 802 s->Printf (" entry = 0x%8.8x\n", header.entry); 803 s->Printf (" code_offset = 0x%8.8x\n", header.code_offset); 804 s->Printf (" data_offset = 0x%8.8x\n", header.data_offset); 805 s->Printf (" image_base = 0x%16.16" PRIx64 "\n", header.image_base); 806 s->Printf (" sect_alignment = 0x%8.8x\n", header.sect_alignment); 807 s->Printf (" file_alignment = 0x%8.8x\n", header.file_alignment); 808 s->Printf (" major_os_system_version = 0x%4.4x\n", header.major_os_system_version); 809 s->Printf (" minor_os_system_version = 0x%4.4x\n", header.minor_os_system_version); 810 s->Printf (" major_image_version = 0x%4.4x\n", header.major_image_version); 811 s->Printf (" minor_image_version = 0x%4.4x\n", header.minor_image_version); 812 s->Printf (" major_subsystem_version = 0x%4.4x\n", header.major_subsystem_version); 813 s->Printf (" minor_subsystem_version = 0x%4.4x\n", header.minor_subsystem_version); 814 s->Printf (" reserved1 = 0x%8.8x\n", header.reserved1); 815 s->Printf (" image_size = 0x%8.8x\n", header.image_size); 816 s->Printf (" header_size = 0x%8.8x\n", header.header_size); 817 s->Printf (" checksum = 0x%8.8x\n", header.checksum); 818 s->Printf (" subsystem = 0x%4.4x\n", header.subsystem); 819 s->Printf (" dll_flags = 0x%4.4x\n", header.dll_flags); 820 s->Printf (" stack_reserve_size = 0x%16.16" PRIx64 "\n", header.stack_reserve_size); 821 s->Printf (" stack_commit_size = 0x%16.16" PRIx64 "\n", header.stack_commit_size); 822 s->Printf (" heap_reserve_size = 0x%16.16" PRIx64 "\n", header.heap_reserve_size); 823 s->Printf (" heap_commit_size = 0x%16.16" PRIx64 "\n", header.heap_commit_size); 824 s->Printf (" loader_flags = 0x%8.8x\n", header.loader_flags); 825 s->Printf (" num_data_dir_entries = 0x%8.8zx\n", header.data_dirs.size()); 826 uint32_t i; 827 for (i=0; i<header.data_dirs.size(); i++) 828 { 829 s->Printf (" data_dirs[%2u] vmaddr = 0x%8.8x, vmsize = 0x%8.8x\n", 830 i, 831 header.data_dirs[i].vmaddr, 832 header.data_dirs[i].vmsize); 833 } 834 } 835 //---------------------------------------------------------------------- 836 // DumpSectionHeader 837 // 838 // Dump a single ELF section header to the specified output stream 839 //---------------------------------------------------------------------- 840 void 841 ObjectFilePECOFF::DumpSectionHeader(Stream *s, const section_header_t& sh) 842 { 843 std::string name; 844 GetSectionName(name, sh); 845 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", 846 name.c_str(), 847 sh.vmaddr, 848 sh.vmsize, 849 sh.offset, 850 sh.size, 851 sh.reloff, 852 sh.lineoff, 853 sh.nreloc, 854 sh.nline, 855 sh.flags); 856 } 857 858 859 //---------------------------------------------------------------------- 860 // DumpSectionHeaders 861 // 862 // Dump all of the ELF section header to the specified output stream 863 //---------------------------------------------------------------------- 864 void 865 ObjectFilePECOFF::DumpSectionHeaders(Stream *s) 866 { 867 868 s->PutCString ("Section Headers\n"); 869 s->PutCString ("IDX name vm addr vm size file off file size reloc off line off nreloc nline flags\n"); 870 s->PutCString ("==== ---------------- ---------- ---------- ---------- ---------- ---------- ---------- ------ ------ ----------\n"); 871 872 uint32_t idx = 0; 873 SectionHeaderCollIter pos, end = m_sect_headers.end(); 874 875 for (pos = m_sect_headers.begin(); pos != end; ++pos, ++idx) 876 { 877 s->Printf ("[%2u] ", idx); 878 ObjectFilePECOFF::DumpSectionHeader(s, *pos); 879 } 880 } 881 882 static bool 883 COFFMachineToMachCPU (uint16_t machine, ArchSpec &arch) 884 { 885 switch (machine) 886 { 887 case IMAGE_FILE_MACHINE_AMD64: 888 case IMAGE_FILE_MACHINE_IA64: 889 arch.SetArchitecture (eArchTypeMachO, 890 llvm::MachO::CPUTypeX86_64, 891 llvm::MachO::CPUSubType_X86_64_ALL); 892 return true; 893 894 case IMAGE_FILE_MACHINE_I386: 895 arch.SetArchitecture (eArchTypeMachO, 896 llvm::MachO::CPUTypeI386, 897 llvm::MachO::CPUSubType_I386_ALL); 898 return true; 899 900 case IMAGE_FILE_MACHINE_POWERPC: 901 case IMAGE_FILE_MACHINE_POWERPCFP: 902 arch.SetArchitecture (eArchTypeMachO, 903 llvm::MachO::CPUTypePowerPC, 904 llvm::MachO::CPUSubType_POWERPC_ALL); 905 return true; 906 case IMAGE_FILE_MACHINE_ARM: 907 case IMAGE_FILE_MACHINE_THUMB: 908 arch.SetArchitecture (eArchTypeMachO, 909 llvm::MachO::CPUTypeARM, 910 llvm::MachO::CPUSubType_ARM_V7); 911 return true; 912 } 913 return false; 914 } 915 bool 916 ObjectFilePECOFF::GetArchitecture (ArchSpec &arch) 917 { 918 // For index zero return our cpu type 919 return COFFMachineToMachCPU (m_coff_header.machine, arch); 920 } 921 922 ObjectFile::Type 923 ObjectFilePECOFF::CalculateType() 924 { 925 if (m_coff_header.machine != 0) 926 { 927 if ((m_coff_header.flags & IMAGE_FILE_DLL) == 0) 928 return eTypeExecutable; 929 else 930 return eTypeSharedLibrary; 931 } 932 return eTypeExecutable; 933 } 934 935 ObjectFile::Strata 936 ObjectFilePECOFF::CalculateStrata() 937 { 938 return eStrataUser; 939 } 940 //------------------------------------------------------------------ 941 // PluginInterface protocol 942 //------------------------------------------------------------------ 943 const char * 944 ObjectFilePECOFF::GetPluginName() 945 { 946 return "ObjectFilePECOFF"; 947 } 948 949 const char * 950 ObjectFilePECOFF::GetShortPluginName() 951 { 952 return GetPluginNameStatic(); 953 } 954 955 uint32_t 956 ObjectFilePECOFF::GetPluginVersion() 957 { 958 return 1; 959 } 960 961