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/ModuleSpec.h" 20 #include "lldb/Core/PluginManager.h" 21 #include "lldb/Core/Section.h" 22 #include "lldb/Core/StreamFile.h" 23 #include "lldb/Core/StreamString.h" 24 #include "lldb/Core/Timer.h" 25 #include "lldb/Core/UUID.h" 26 #include "lldb/Symbol/ObjectFile.h" 27 28 static uint32_t COFFMachineToMachCPU(uint16_t machine); 29 30 #define IMAGE_FILE_MACHINE_UNKNOWN 0x0000 31 #define IMAGE_FILE_MACHINE_AM33 0x01d3 // Matsushita AM33 32 #define IMAGE_FILE_MACHINE_AMD64 0x8664 // x64 33 #define IMAGE_FILE_MACHINE_ARM 0x01c0 // ARM little endian 34 #define IMAGE_FILE_MACHINE_EBC 0x0ebc // EFI byte code 35 #define IMAGE_FILE_MACHINE_I386 0x014c // Intel 386 or later processors and compatible processors 36 #define IMAGE_FILE_MACHINE_IA64 0x0200 // Intel Itanium processor family 37 #define IMAGE_FILE_MACHINE_M32R 0x9041 // Mitsubishi M32R little endian 38 #define IMAGE_FILE_MACHINE_MIPS16 0x0266 // MIPS16 39 #define IMAGE_FILE_MACHINE_MIPSFPU 0x0366 // MIPS with FPU 40 #define IMAGE_FILE_MACHINE_MIPSFPU16 0x0466 // MIPS16 with FPU 41 #define IMAGE_FILE_MACHINE_POWERPC 0x01f0 // Power PC little endian 42 #define IMAGE_FILE_MACHINE_POWERPCFP 0x01f1 // Power PC with floating point support 43 #define IMAGE_FILE_MACHINE_R4000 0x0166 // MIPS little endian 44 #define IMAGE_FILE_MACHINE_SH3 0x01a2 // Hitachi SH3 45 #define IMAGE_FILE_MACHINE_SH3DSP 0x01a3 // Hitachi SH3 DSP 46 #define IMAGE_FILE_MACHINE_SH4 0x01a6 // Hitachi SH4 47 #define IMAGE_FILE_MACHINE_SH5 0x01a8 // Hitachi SH5 48 #define IMAGE_FILE_MACHINE_THUMB 0x01c2 // Thumb 49 #define IMAGE_FILE_MACHINE_WCEMIPSV2 0x0169 // MIPS little-endian WCE v2 50 51 52 #define IMAGE_DOS_SIGNATURE 0x5A4D // MZ 53 #define IMAGE_OS2_SIGNATURE 0x454E // NE 54 #define IMAGE_OS2_SIGNATURE_LE 0x454C // LE 55 #define IMAGE_NT_SIGNATURE 0x00004550 // PE00 56 #define OPT_HEADER_MAGIC_PE32 0x010b 57 #define OPT_HEADER_MAGIC_PE32_PLUS 0x020b 58 59 #define IMAGE_FILE_RELOCS_STRIPPED 0x0001 60 #define IMAGE_FILE_EXECUTABLE_IMAGE 0x0002 61 #define IMAGE_FILE_LINE_NUMS_STRIPPED 0x0004 62 #define IMAGE_FILE_LOCAL_SYMS_STRIPPED 0x0008 63 #define IMAGE_FILE_AGGRESSIVE_WS_TRIM 0x0010 64 #define IMAGE_FILE_LARGE_ADDRESS_AWARE 0x0020 65 //#define 0x0040 // Reserved 66 #define IMAGE_FILE_BYTES_REVERSED_LO 0x0080 67 #define IMAGE_FILE_32BIT_MACHINE 0x0100 68 #define IMAGE_FILE_DEBUG_STRIPPED 0x0200 69 #define IMAGE_FILE_REMOVABLE_RUN_FROM_SWAP 0x0400 70 #define IMAGE_FILE_NET_RUN_FROM_SWAP 0x0800 71 #define IMAGE_FILE_SYSTEM 0x1000 72 #define IMAGE_FILE_DLL 0x2000 73 #define IMAGE_FILE_UP_SYSTEM_ONLY 0x4000 74 #define IMAGE_FILE_BYTES_REVERSED_HI 0x8000 75 76 77 // Section Flags 78 // The section flags in the Characteristics field of the section header indicate 79 // characteristics of the section. 80 #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. 81 #define IMAGE_SCN_CNT_CODE 0x00000020 // The section contains executable code. 82 #define IMAGE_SCN_CNT_INITIALIZED_DATA 0x00000040 // The section contains initialized data. 83 #define IMAGE_SCN_CNT_UNINITIALIZED_DATA 0x00000080 // The section contains uninitialized data. 84 #define IMAGE_SCN_LNK_OTHER 0x00000100 // Reserved for future use. 85 #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. 86 #define IMAGE_SCN_LNK_REMOVE 0x00000800 // The section will not become part of the image. This is valid only for object files. 87 #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. 88 #define IMAGE_SCN_GPREL 0x00008000 // The section contains data referenced through the global pointer (GP). 89 #define IMAGE_SCN_MEM_PURGEABLE 0x00020000 90 #define IMAGE_SCN_MEM_16BIT 0x00020000 // For ARM machine types, the section contains Thumb code. Reserved for future use with other machine types. 91 #define IMAGE_SCN_MEM_LOCKED 0x00040000 92 #define IMAGE_SCN_MEM_PRELOAD 0x00080000 93 #define IMAGE_SCN_ALIGN_1BYTES 0x00100000 // Align data on a 1-byte boundary. Valid only for object files. 94 #define IMAGE_SCN_ALIGN_2BYTES 0x00200000 // Align data on a 2-byte boundary. Valid only for object files. 95 #define IMAGE_SCN_ALIGN_4BYTES 0x00300000 // Align data on a 4-byte boundary. Valid only for object files. 96 #define IMAGE_SCN_ALIGN_8BYTES 0x00400000 // Align data on an 8-byte boundary. Valid only for object files. 97 #define IMAGE_SCN_ALIGN_16BYTES 0x00500000 // Align data on a 16-byte boundary. Valid only for object files. 98 #define IMAGE_SCN_ALIGN_32BYTES 0x00600000 // Align data on a 32-byte boundary. Valid only for object files. 99 #define IMAGE_SCN_ALIGN_64BYTES 0x00700000 // Align data on a 64-byte boundary. Valid only for object files. 100 #define IMAGE_SCN_ALIGN_128BYTES 0x00800000 // Align data on a 128-byte boundary. Valid only for object files. 101 #define IMAGE_SCN_ALIGN_256BYTES 0x00900000 // Align data on a 256-byte boundary. Valid only for object files. 102 #define IMAGE_SCN_ALIGN_512BYTES 0x00A00000 // Align data on a 512-byte boundary. Valid only for object files. 103 #define IMAGE_SCN_ALIGN_1024BYTES 0x00B00000 // Align data on a 1024-byte boundary. Valid only for object files. 104 #define IMAGE_SCN_ALIGN_2048BYTES 0x00C00000 // Align data on a 2048-byte boundary. Valid only for object files. 105 #define IMAGE_SCN_ALIGN_4096BYTES 0x00D00000 // Align data on a 4096-byte boundary. Valid only for object files. 106 #define IMAGE_SCN_ALIGN_8192BYTES 0x00E00000 // Align data on an 8192-byte boundary. Valid only for object files. 107 #define IMAGE_SCN_LNK_NRELOC_OVFL 0x01000000 // The section contains extended relocations. 108 #define IMAGE_SCN_MEM_DISCARDABLE 0x02000000 // The section can be discarded as needed. 109 #define IMAGE_SCN_MEM_NOT_CACHED 0x04000000 // The section cannot be cached. 110 #define IMAGE_SCN_MEM_NOT_PAGED 0x08000000 // The section is not pageable. 111 #define IMAGE_SCN_MEM_SHARED 0x10000000 // The section can be shared in memory. 112 #define IMAGE_SCN_MEM_EXECUTE 0x20000000 // The section can be executed as code. 113 #define IMAGE_SCN_MEM_READ 0x40000000 // The section can be read. 114 #define IMAGE_SCN_MEM_WRITE 0x80000000 // The section can be written to. 115 116 using namespace lldb; 117 using namespace lldb_private; 118 119 void 120 ObjectFilePECOFF::Initialize() 121 { 122 PluginManager::RegisterPlugin (GetPluginNameStatic(), 123 GetPluginDescriptionStatic(), 124 CreateInstance, 125 CreateMemoryInstance, 126 GetModuleSpecifications); 127 } 128 129 void 130 ObjectFilePECOFF::Terminate() 131 { 132 PluginManager::UnregisterPlugin (CreateInstance); 133 } 134 135 136 lldb_private::ConstString 137 ObjectFilePECOFF::GetPluginNameStatic() 138 { 139 static ConstString g_name("pe-coff"); 140 return g_name; 141 } 142 143 const char * 144 ObjectFilePECOFF::GetPluginDescriptionStatic() 145 { 146 return "Portable Executable and Common Object File Format object file reader (32 and 64 bit)"; 147 } 148 149 150 ObjectFile * 151 ObjectFilePECOFF::CreateInstance (const lldb::ModuleSP &module_sp, 152 DataBufferSP& data_sp, 153 lldb::offset_t data_offset, 154 const lldb_private::FileSpec* file, 155 lldb::offset_t file_offset, 156 lldb::offset_t length) 157 { 158 if (!data_sp) 159 { 160 data_sp = file->MemoryMapFileContents(file_offset, length); 161 data_offset = 0; 162 } 163 164 if (ObjectFilePECOFF::MagicBytesMatch(data_sp)) 165 { 166 // Update the data to contain the entire file if it doesn't already 167 if (data_sp->GetByteSize() < length) 168 data_sp = file->MemoryMapFileContents(file_offset, length); 169 std::unique_ptr<ObjectFile> objfile_ap(new ObjectFilePECOFF (module_sp, data_sp, data_offset, file, file_offset, length)); 170 if (objfile_ap.get() && objfile_ap->ParseHeader()) 171 return objfile_ap.release(); 172 } 173 return NULL; 174 } 175 176 ObjectFile * 177 ObjectFilePECOFF::CreateMemoryInstance (const lldb::ModuleSP &module_sp, 178 lldb::DataBufferSP& data_sp, 179 const lldb::ProcessSP &process_sp, 180 lldb::addr_t header_addr) 181 { 182 return NULL; 183 } 184 185 size_t 186 ObjectFilePECOFF::GetModuleSpecifications (const lldb_private::FileSpec& file, 187 lldb::DataBufferSP& data_sp, 188 lldb::offset_t data_offset, 189 lldb::offset_t file_offset, 190 lldb::offset_t length, 191 lldb_private::ModuleSpecList &specs) 192 { 193 return 0; 194 } 195 196 197 bool 198 ObjectFilePECOFF::MagicBytesMatch (DataBufferSP& data_sp) 199 { 200 DataExtractor data(data_sp, eByteOrderLittle, 4); 201 lldb::offset_t offset = 0; 202 uint16_t magic = data.GetU16 (&offset); 203 return magic == IMAGE_DOS_SIGNATURE; 204 } 205 206 207 ObjectFilePECOFF::ObjectFilePECOFF (const lldb::ModuleSP &module_sp, 208 DataBufferSP& data_sp, 209 lldb::offset_t data_offset, 210 const FileSpec* file, 211 lldb::offset_t file_offset, 212 lldb::offset_t length) : 213 ObjectFile (module_sp, file, file_offset, length, data_sp, data_offset), 214 m_dos_header (), 215 m_coff_header (), 216 m_coff_header_opt (), 217 m_sect_headers () 218 { 219 ::memset (&m_dos_header, 0, sizeof(m_dos_header)); 220 ::memset (&m_coff_header, 0, sizeof(m_coff_header)); 221 ::memset (&m_coff_header_opt, 0, sizeof(m_coff_header_opt)); 222 } 223 224 225 ObjectFilePECOFF::~ObjectFilePECOFF() 226 { 227 } 228 229 230 bool 231 ObjectFilePECOFF::ParseHeader () 232 { 233 ModuleSP module_sp(GetModule()); 234 if (module_sp) 235 { 236 lldb_private::Mutex::Locker locker(module_sp->GetMutex()); 237 m_sect_headers.clear(); 238 m_data.SetByteOrder (eByteOrderLittle); 239 lldb::offset_t offset = 0; 240 241 if (ParseDOSHeader()) 242 { 243 offset = m_dos_header.e_lfanew; 244 uint32_t pe_signature = m_data.GetU32 (&offset); 245 if (pe_signature != IMAGE_NT_SIGNATURE) 246 return false; 247 if (ParseCOFFHeader(&offset)) 248 { 249 if (m_coff_header.hdrsize > 0) 250 ParseCOFFOptionalHeader(&offset); 251 ParseSectionHeaders (offset); 252 } 253 return true; 254 } 255 } 256 return false; 257 } 258 259 260 ByteOrder 261 ObjectFilePECOFF::GetByteOrder () const 262 { 263 return eByteOrderLittle; 264 } 265 266 bool 267 ObjectFilePECOFF::IsExecutable() const 268 { 269 return (m_coff_header.flags & IMAGE_FILE_DLL) == 0; 270 } 271 272 uint32_t 273 ObjectFilePECOFF::GetAddressByteSize () const 274 { 275 if (m_coff_header_opt.magic == OPT_HEADER_MAGIC_PE32_PLUS) 276 return 8; 277 else if (m_coff_header_opt.magic == OPT_HEADER_MAGIC_PE32) 278 return 4; 279 return 4; 280 } 281 282 //---------------------------------------------------------------------- 283 // NeedsEndianSwap 284 // 285 // Return true if an endian swap needs to occur when extracting data 286 // from this file. 287 //---------------------------------------------------------------------- 288 bool 289 ObjectFilePECOFF::NeedsEndianSwap() const 290 { 291 #if defined(__LITTLE_ENDIAN__) 292 return false; 293 #else 294 return true; 295 #endif 296 } 297 //---------------------------------------------------------------------- 298 // ParseDOSHeader 299 //---------------------------------------------------------------------- 300 bool 301 ObjectFilePECOFF::ParseDOSHeader () 302 { 303 bool success = false; 304 lldb::offset_t offset = 0; 305 success = m_data.ValidOffsetForDataOfSize(0, sizeof(m_dos_header)); 306 307 if (success) 308 { 309 m_dos_header.e_magic = m_data.GetU16(&offset); // Magic number 310 success = m_dos_header.e_magic == IMAGE_DOS_SIGNATURE; 311 312 if (success) 313 { 314 m_dos_header.e_cblp = m_data.GetU16(&offset); // Bytes on last page of file 315 m_dos_header.e_cp = m_data.GetU16(&offset); // Pages in file 316 m_dos_header.e_crlc = m_data.GetU16(&offset); // Relocations 317 m_dos_header.e_cparhdr = m_data.GetU16(&offset); // Size of header in paragraphs 318 m_dos_header.e_minalloc = m_data.GetU16(&offset); // Minimum extra paragraphs needed 319 m_dos_header.e_maxalloc = m_data.GetU16(&offset); // Maximum extra paragraphs needed 320 m_dos_header.e_ss = m_data.GetU16(&offset); // Initial (relative) SS value 321 m_dos_header.e_sp = m_data.GetU16(&offset); // Initial SP value 322 m_dos_header.e_csum = m_data.GetU16(&offset); // Checksum 323 m_dos_header.e_ip = m_data.GetU16(&offset); // Initial IP value 324 m_dos_header.e_cs = m_data.GetU16(&offset); // Initial (relative) CS value 325 m_dos_header.e_lfarlc = m_data.GetU16(&offset); // File address of relocation table 326 m_dos_header.e_ovno = m_data.GetU16(&offset); // Overlay number 327 328 m_dos_header.e_res[0] = m_data.GetU16(&offset); // Reserved words 329 m_dos_header.e_res[1] = m_data.GetU16(&offset); // Reserved words 330 m_dos_header.e_res[2] = m_data.GetU16(&offset); // Reserved words 331 m_dos_header.e_res[3] = m_data.GetU16(&offset); // Reserved words 332 333 m_dos_header.e_oemid = m_data.GetU16(&offset); // OEM identifier (for e_oeminfo) 334 m_dos_header.e_oeminfo = m_data.GetU16(&offset); // OEM information; e_oemid specific 335 m_dos_header.e_res2[0] = m_data.GetU16(&offset); // Reserved words 336 m_dos_header.e_res2[1] = m_data.GetU16(&offset); // Reserved words 337 m_dos_header.e_res2[2] = m_data.GetU16(&offset); // Reserved words 338 m_dos_header.e_res2[3] = m_data.GetU16(&offset); // Reserved words 339 m_dos_header.e_res2[4] = m_data.GetU16(&offset); // Reserved words 340 m_dos_header.e_res2[5] = m_data.GetU16(&offset); // Reserved words 341 m_dos_header.e_res2[6] = m_data.GetU16(&offset); // Reserved words 342 m_dos_header.e_res2[7] = m_data.GetU16(&offset); // Reserved words 343 m_dos_header.e_res2[8] = m_data.GetU16(&offset); // Reserved words 344 m_dos_header.e_res2[9] = m_data.GetU16(&offset); // Reserved words 345 346 m_dos_header.e_lfanew = m_data.GetU32(&offset); // File address of new exe header 347 } 348 } 349 if (!success) 350 memset(&m_dos_header, 0, sizeof(m_dos_header)); 351 return success; 352 } 353 354 355 //---------------------------------------------------------------------- 356 // ParserCOFFHeader 357 //---------------------------------------------------------------------- 358 bool 359 ObjectFilePECOFF::ParseCOFFHeader(lldb::offset_t *offset_ptr) 360 { 361 bool success = m_data.ValidOffsetForDataOfSize (*offset_ptr, sizeof(m_coff_header)); 362 if (success) 363 { 364 m_coff_header.machine = m_data.GetU16(offset_ptr); 365 m_coff_header.nsects = m_data.GetU16(offset_ptr); 366 m_coff_header.modtime = m_data.GetU32(offset_ptr); 367 m_coff_header.symoff = m_data.GetU32(offset_ptr); 368 m_coff_header.nsyms = m_data.GetU32(offset_ptr); 369 m_coff_header.hdrsize = m_data.GetU16(offset_ptr); 370 m_coff_header.flags = m_data.GetU16(offset_ptr); 371 } 372 if (!success) 373 memset(&m_coff_header, 0, sizeof(m_coff_header)); 374 return success; 375 } 376 377 bool 378 ObjectFilePECOFF::ParseCOFFOptionalHeader(lldb::offset_t *offset_ptr) 379 { 380 bool success = false; 381 const lldb::offset_t end_offset = *offset_ptr + m_coff_header.hdrsize; 382 if (*offset_ptr < end_offset) 383 { 384 success = true; 385 m_coff_header_opt.magic = m_data.GetU16(offset_ptr); 386 m_coff_header_opt.major_linker_version = m_data.GetU8 (offset_ptr); 387 m_coff_header_opt.minor_linker_version = m_data.GetU8 (offset_ptr); 388 m_coff_header_opt.code_size = m_data.GetU32(offset_ptr); 389 m_coff_header_opt.data_size = m_data.GetU32(offset_ptr); 390 m_coff_header_opt.bss_size = m_data.GetU32(offset_ptr); 391 m_coff_header_opt.entry = m_data.GetU32(offset_ptr); 392 m_coff_header_opt.code_offset = m_data.GetU32(offset_ptr); 393 394 const uint32_t addr_byte_size = GetAddressByteSize (); 395 396 if (*offset_ptr < end_offset) 397 { 398 if (m_coff_header_opt.magic == OPT_HEADER_MAGIC_PE32) 399 { 400 // PE32 only 401 m_coff_header_opt.data_offset = m_data.GetU32(offset_ptr); 402 } 403 else 404 m_coff_header_opt.data_offset = 0; 405 406 if (*offset_ptr < end_offset) 407 { 408 m_coff_header_opt.image_base = m_data.GetMaxU64 (offset_ptr, addr_byte_size); 409 m_coff_header_opt.sect_alignment = m_data.GetU32(offset_ptr); 410 m_coff_header_opt.file_alignment = m_data.GetU32(offset_ptr); 411 m_coff_header_opt.major_os_system_version = m_data.GetU16(offset_ptr); 412 m_coff_header_opt.minor_os_system_version = m_data.GetU16(offset_ptr); 413 m_coff_header_opt.major_image_version = m_data.GetU16(offset_ptr); 414 m_coff_header_opt.minor_image_version = m_data.GetU16(offset_ptr); 415 m_coff_header_opt.major_subsystem_version = m_data.GetU16(offset_ptr); 416 m_coff_header_opt.minor_subsystem_version = m_data.GetU16(offset_ptr); 417 m_coff_header_opt.reserved1 = m_data.GetU32(offset_ptr); 418 m_coff_header_opt.image_size = m_data.GetU32(offset_ptr); 419 m_coff_header_opt.header_size = m_data.GetU32(offset_ptr); 420 m_coff_header_opt.checksum = m_data.GetU32(offset_ptr); 421 m_coff_header_opt.subsystem = m_data.GetU16(offset_ptr); 422 m_coff_header_opt.dll_flags = m_data.GetU16(offset_ptr); 423 m_coff_header_opt.stack_reserve_size = m_data.GetMaxU64 (offset_ptr, addr_byte_size); 424 m_coff_header_opt.stack_commit_size = m_data.GetMaxU64 (offset_ptr, addr_byte_size); 425 m_coff_header_opt.heap_reserve_size = m_data.GetMaxU64 (offset_ptr, addr_byte_size); 426 m_coff_header_opt.heap_commit_size = m_data.GetMaxU64 (offset_ptr, addr_byte_size); 427 m_coff_header_opt.loader_flags = m_data.GetU32(offset_ptr); 428 uint32_t num_data_dir_entries = m_data.GetU32(offset_ptr); 429 m_coff_header_opt.data_dirs.clear(); 430 m_coff_header_opt.data_dirs.resize(num_data_dir_entries); 431 uint32_t i; 432 for (i=0; i<num_data_dir_entries; i++) 433 { 434 m_coff_header_opt.data_dirs[i].vmaddr = m_data.GetU32(offset_ptr); 435 m_coff_header_opt.data_dirs[i].vmsize = m_data.GetU32(offset_ptr); 436 } 437 } 438 } 439 } 440 // Make sure we are on track for section data which follows 441 *offset_ptr = end_offset; 442 return success; 443 } 444 445 446 //---------------------------------------------------------------------- 447 // ParseSectionHeaders 448 //---------------------------------------------------------------------- 449 bool 450 ObjectFilePECOFF::ParseSectionHeaders (uint32_t section_header_data_offset) 451 { 452 const uint32_t nsects = m_coff_header.nsects; 453 m_sect_headers.clear(); 454 455 if (nsects > 0) 456 { 457 const uint32_t addr_byte_size = GetAddressByteSize (); 458 const size_t section_header_byte_size = nsects * sizeof(section_header_t); 459 DataBufferSP section_header_data_sp(m_file.ReadFileContents (section_header_data_offset, section_header_byte_size)); 460 DataExtractor section_header_data (section_header_data_sp, GetByteOrder(), addr_byte_size); 461 462 lldb::offset_t offset = 0; 463 if (section_header_data.ValidOffsetForDataOfSize (offset, section_header_byte_size)) 464 { 465 m_sect_headers.resize(nsects); 466 467 for (uint32_t idx = 0; idx<nsects; ++idx) 468 { 469 const void *name_data = section_header_data.GetData(&offset, 8); 470 if (name_data) 471 { 472 memcpy(m_sect_headers[idx].name, name_data, 8); 473 m_sect_headers[idx].vmsize = section_header_data.GetU32(&offset); 474 m_sect_headers[idx].vmaddr = section_header_data.GetU32(&offset); 475 m_sect_headers[idx].size = section_header_data.GetU32(&offset); 476 m_sect_headers[idx].offset = section_header_data.GetU32(&offset); 477 m_sect_headers[idx].reloff = section_header_data.GetU32(&offset); 478 m_sect_headers[idx].lineoff = section_header_data.GetU32(&offset); 479 m_sect_headers[idx].nreloc = section_header_data.GetU16(&offset); 480 m_sect_headers[idx].nline = section_header_data.GetU16(&offset); 481 m_sect_headers[idx].flags = section_header_data.GetU32(&offset); 482 } 483 } 484 } 485 } 486 487 return m_sect_headers.empty() == false; 488 } 489 490 bool 491 ObjectFilePECOFF::GetSectionName(std::string& sect_name, const section_header_t& sect) 492 { 493 if (sect.name[0] == '/') 494 { 495 lldb::offset_t stroff = strtoul(§.name[1], NULL, 10); 496 lldb::offset_t string_file_offset = m_coff_header.symoff + (m_coff_header.nsyms * 18) + stroff; 497 const char *name = m_data.GetCStr (&string_file_offset); 498 if (name) 499 { 500 sect_name = name; 501 return true; 502 } 503 504 return false; 505 } 506 sect_name = sect.name; 507 return true; 508 } 509 510 //---------------------------------------------------------------------- 511 // GetNListSymtab 512 //---------------------------------------------------------------------- 513 Symtab * 514 ObjectFilePECOFF::GetSymtab() 515 { 516 ModuleSP module_sp(GetModule()); 517 if (module_sp) 518 { 519 lldb_private::Mutex::Locker locker(module_sp->GetMutex()); 520 if (m_symtab_ap.get() == NULL) 521 { 522 SectionList *sect_list = GetSectionList(); 523 m_symtab_ap.reset(new Symtab(this)); 524 Mutex::Locker symtab_locker (m_symtab_ap->GetMutex()); 525 526 const uint32_t num_syms = m_coff_header.nsyms; 527 528 if (num_syms > 0 && m_coff_header.symoff > 0) 529 { 530 const uint32_t symbol_size = sizeof(section_header_t); 531 const uint32_t addr_byte_size = GetAddressByteSize (); 532 const size_t symbol_data_size = num_syms * symbol_size; 533 // Include the 4 bytes string table size at the end of the symbols 534 DataBufferSP symtab_data_sp(m_file.ReadFileContents (m_coff_header.symoff, symbol_data_size + 4)); 535 DataExtractor symtab_data (symtab_data_sp, GetByteOrder(), addr_byte_size); 536 lldb::offset_t offset = symbol_data_size; 537 const uint32_t strtab_size = symtab_data.GetU32 (&offset); 538 DataBufferSP strtab_data_sp(m_file.ReadFileContents (m_coff_header.symoff + symbol_data_size + 4, strtab_size)); 539 DataExtractor strtab_data (strtab_data_sp, GetByteOrder(), addr_byte_size); 540 541 offset = 0; 542 std::string symbol_name; 543 Symbol *symbols = m_symtab_ap->Resize (num_syms); 544 for (uint32_t i=0; i<num_syms; ++i) 545 { 546 coff_symbol_t symbol; 547 const uint32_t symbol_offset = offset; 548 const char *symbol_name_cstr = NULL; 549 // If the first 4 bytes of the symbol string are zero, then we 550 // it is followed by a 4 byte string table offset. Else these 551 // 8 bytes contain the symbol name 552 if (symtab_data.GetU32 (&offset) == 0) 553 { 554 // Long string that doesn't fit into the symbol table name, 555 // so now we must read the 4 byte string table offset 556 uint32_t strtab_offset = symtab_data.GetU32 (&offset); 557 symbol_name_cstr = strtab_data.PeekCStr (strtab_offset); 558 symbol_name.assign (symbol_name_cstr); 559 } 560 else 561 { 562 // Short string that fits into the symbol table name which is 8 bytes 563 offset += sizeof(symbol.name) - 4; // Skip remaining 564 symbol_name_cstr = symtab_data.PeekCStr (symbol_offset); 565 if (symbol_name_cstr == NULL) 566 break; 567 symbol_name.assign (symbol_name_cstr, sizeof(symbol.name)); 568 } 569 symbol.value = symtab_data.GetU32 (&offset); 570 symbol.sect = symtab_data.GetU16 (&offset); 571 symbol.type = symtab_data.GetU16 (&offset); 572 symbol.storage = symtab_data.GetU8 (&offset); 573 symbol.naux = symtab_data.GetU8 (&offset); 574 Address symbol_addr(sect_list->GetSectionAtIndex(symbol.sect-1), symbol.value); 575 symbols[i].GetMangled ().SetValue (ConstString(symbol_name.c_str())); 576 symbols[i].GetAddress() = symbol_addr; 577 578 if (symbol.naux > 0) 579 i += symbol.naux; 580 } 581 582 } 583 } 584 } 585 return m_symtab_ap.get(); 586 587 } 588 589 SectionList * 590 ObjectFilePECOFF::GetSectionList() 591 { 592 ModuleSP module_sp(GetModule()); 593 if (module_sp) 594 { 595 lldb_private::Mutex::Locker locker(module_sp->GetMutex()); 596 if (m_sections_ap.get() == NULL) 597 { 598 m_sections_ap.reset(new SectionList()); 599 const uint32_t nsects = m_sect_headers.size(); 600 ModuleSP module_sp (GetModule()); 601 for (uint32_t idx = 0; idx<nsects; ++idx) 602 { 603 std::string sect_name; 604 GetSectionName (sect_name, m_sect_headers[idx]); 605 ConstString const_sect_name (sect_name.c_str()); 606 static ConstString g_code_sect_name (".code"); 607 static ConstString g_CODE_sect_name ("CODE"); 608 static ConstString g_data_sect_name (".data"); 609 static ConstString g_DATA_sect_name ("DATA"); 610 static ConstString g_bss_sect_name (".bss"); 611 static ConstString g_BSS_sect_name ("BSS"); 612 static ConstString g_debug_sect_name (".debug"); 613 static ConstString g_reloc_sect_name (".reloc"); 614 static ConstString g_stab_sect_name (".stab"); 615 static ConstString g_stabstr_sect_name (".stabstr"); 616 SectionType section_type = eSectionTypeOther; 617 if (m_sect_headers[idx].flags & IMAGE_SCN_CNT_CODE && 618 ((const_sect_name == g_code_sect_name) || (const_sect_name == g_CODE_sect_name))) 619 { 620 section_type = eSectionTypeCode; 621 } 622 else if (m_sect_headers[idx].flags & IMAGE_SCN_CNT_INITIALIZED_DATA && 623 ((const_sect_name == g_data_sect_name) || (const_sect_name == g_DATA_sect_name))) 624 { 625 section_type = eSectionTypeData; 626 } 627 else if (m_sect_headers[idx].flags & IMAGE_SCN_CNT_UNINITIALIZED_DATA && 628 ((const_sect_name == g_bss_sect_name) || (const_sect_name == g_BSS_sect_name))) 629 { 630 if (m_sect_headers[idx].size == 0) 631 section_type = eSectionTypeZeroFill; 632 else 633 section_type = eSectionTypeData; 634 } 635 else if (const_sect_name == g_debug_sect_name) 636 { 637 section_type = eSectionTypeDebug; 638 } 639 else if (const_sect_name == g_stabstr_sect_name) 640 { 641 section_type = eSectionTypeDataCString; 642 } 643 else if (const_sect_name == g_reloc_sect_name) 644 { 645 section_type = eSectionTypeOther; 646 } 647 else if (m_sect_headers[idx].flags & IMAGE_SCN_CNT_CODE) 648 { 649 section_type = eSectionTypeCode; 650 } 651 else if (m_sect_headers[idx].flags & IMAGE_SCN_CNT_INITIALIZED_DATA) 652 { 653 section_type = eSectionTypeData; 654 } 655 else if (m_sect_headers[idx].flags & IMAGE_SCN_CNT_UNINITIALIZED_DATA) 656 { 657 if (m_sect_headers[idx].size == 0) 658 section_type = eSectionTypeZeroFill; 659 else 660 section_type = eSectionTypeData; 661 } 662 663 // Use a segment ID of the segment index shifted left by 8 so they 664 // never conflict with any of the sections. 665 SectionSP section_sp (new Section (module_sp, // Module to which this section belongs 666 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 667 const_sect_name, // Name of this section 668 section_type, // This section is a container of other sections. 669 m_sect_headers[idx].vmaddr, // File VM address == addresses as they are found in the object file 670 m_sect_headers[idx].vmsize, // VM size in bytes of this section 671 m_sect_headers[idx].offset, // Offset to the data for this section in the file 672 m_sect_headers[idx].size, // Size in bytes of this section as found in the the file 673 m_sect_headers[idx].flags)); // Flags for this section 674 675 //section_sp->SetIsEncrypted (segment_is_encrypted); 676 677 m_sections_ap->AddSection(section_sp); 678 } 679 680 m_sections_ap->Finalize(); // Now that we're done adding sections, finalize to build fast-lookup caches 681 } 682 } 683 return m_sections_ap.get(); 684 } 685 686 bool 687 ObjectFilePECOFF::GetUUID (UUID* uuid) 688 { 689 return false; 690 } 691 692 uint32_t 693 ObjectFilePECOFF::GetDependentModules (FileSpecList& files) 694 { 695 return 0; 696 } 697 698 699 //---------------------------------------------------------------------- 700 // Dump 701 // 702 // Dump the specifics of the runtime file container (such as any headers 703 // segments, sections, etc). 704 //---------------------------------------------------------------------- 705 void 706 ObjectFilePECOFF::Dump(Stream *s) 707 { 708 ModuleSP module_sp(GetModule()); 709 if (module_sp) 710 { 711 lldb_private::Mutex::Locker locker(module_sp->GetMutex()); 712 s->Printf("%p: ", this); 713 s->Indent(); 714 s->PutCString("ObjectFilePECOFF"); 715 716 ArchSpec header_arch; 717 GetArchitecture (header_arch); 718 719 *s << ", file = '" << m_file << "', arch = " << header_arch.GetArchitectureName() << "\n"; 720 721 if (m_sections_ap.get()) 722 m_sections_ap->Dump(s, NULL, true, UINT32_MAX); 723 724 if (m_symtab_ap.get()) 725 m_symtab_ap->Dump(s, NULL, eSortOrderNone); 726 727 if (m_dos_header.e_magic) 728 DumpDOSHeader (s, m_dos_header); 729 if (m_coff_header.machine) 730 { 731 DumpCOFFHeader (s, m_coff_header); 732 if (m_coff_header.hdrsize) 733 DumpOptCOFFHeader (s, m_coff_header_opt); 734 } 735 s->EOL(); 736 DumpSectionHeaders(s); 737 s->EOL(); 738 } 739 } 740 741 //---------------------------------------------------------------------- 742 // DumpDOSHeader 743 // 744 // Dump the MS-DOS header to the specified output stream 745 //---------------------------------------------------------------------- 746 void 747 ObjectFilePECOFF::DumpDOSHeader(Stream *s, const dos_header_t& header) 748 { 749 s->PutCString ("MSDOS Header\n"); 750 s->Printf (" e_magic = 0x%4.4x\n", header.e_magic); 751 s->Printf (" e_cblp = 0x%4.4x\n", header.e_cblp); 752 s->Printf (" e_cp = 0x%4.4x\n", header.e_cp); 753 s->Printf (" e_crlc = 0x%4.4x\n", header.e_crlc); 754 s->Printf (" e_cparhdr = 0x%4.4x\n", header.e_cparhdr); 755 s->Printf (" e_minalloc = 0x%4.4x\n", header.e_minalloc); 756 s->Printf (" e_maxalloc = 0x%4.4x\n", header.e_maxalloc); 757 s->Printf (" e_ss = 0x%4.4x\n", header.e_ss); 758 s->Printf (" e_sp = 0x%4.4x\n", header.e_sp); 759 s->Printf (" e_csum = 0x%4.4x\n", header.e_csum); 760 s->Printf (" e_ip = 0x%4.4x\n", header.e_ip); 761 s->Printf (" e_cs = 0x%4.4x\n", header.e_cs); 762 s->Printf (" e_lfarlc = 0x%4.4x\n", header.e_lfarlc); 763 s->Printf (" e_ovno = 0x%4.4x\n", header.e_ovno); 764 s->Printf (" e_res[4] = { 0x%4.4x, 0x%4.4x, 0x%4.4x, 0x%4.4x }\n", 765 header.e_res[0], 766 header.e_res[1], 767 header.e_res[2], 768 header.e_res[3]); 769 s->Printf (" e_oemid = 0x%4.4x\n", header.e_oemid); 770 s->Printf (" e_oeminfo = 0x%4.4x\n", header.e_oeminfo); 771 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", 772 header.e_res2[0], 773 header.e_res2[1], 774 header.e_res2[2], 775 header.e_res2[3], 776 header.e_res2[4], 777 header.e_res2[5], 778 header.e_res2[6], 779 header.e_res2[7], 780 header.e_res2[8], 781 header.e_res2[9]); 782 s->Printf (" e_lfanew = 0x%8.8x\n", header.e_lfanew); 783 } 784 785 //---------------------------------------------------------------------- 786 // DumpCOFFHeader 787 // 788 // Dump the COFF header to the specified output stream 789 //---------------------------------------------------------------------- 790 void 791 ObjectFilePECOFF::DumpCOFFHeader(Stream *s, const coff_header_t& header) 792 { 793 s->PutCString ("COFF Header\n"); 794 s->Printf (" machine = 0x%4.4x\n", header.machine); 795 s->Printf (" nsects = 0x%4.4x\n", header.nsects); 796 s->Printf (" modtime = 0x%8.8x\n", header.modtime); 797 s->Printf (" symoff = 0x%8.8x\n", header.symoff); 798 s->Printf (" nsyms = 0x%8.8x\n", header.nsyms); 799 s->Printf (" hdrsize = 0x%4.4x\n", header.hdrsize); 800 } 801 802 //---------------------------------------------------------------------- 803 // DumpOptCOFFHeader 804 // 805 // Dump the optional COFF header to the specified output stream 806 //---------------------------------------------------------------------- 807 void 808 ObjectFilePECOFF::DumpOptCOFFHeader(Stream *s, const coff_opt_header_t& header) 809 { 810 s->PutCString ("Optional COFF Header\n"); 811 s->Printf (" magic = 0x%4.4x\n", header.magic); 812 s->Printf (" major_linker_version = 0x%2.2x\n", header.major_linker_version); 813 s->Printf (" minor_linker_version = 0x%2.2x\n", header.minor_linker_version); 814 s->Printf (" code_size = 0x%8.8x\n", header.code_size); 815 s->Printf (" data_size = 0x%8.8x\n", header.data_size); 816 s->Printf (" bss_size = 0x%8.8x\n", header.bss_size); 817 s->Printf (" entry = 0x%8.8x\n", header.entry); 818 s->Printf (" code_offset = 0x%8.8x\n", header.code_offset); 819 s->Printf (" data_offset = 0x%8.8x\n", header.data_offset); 820 s->Printf (" image_base = 0x%16.16" PRIx64 "\n", header.image_base); 821 s->Printf (" sect_alignment = 0x%8.8x\n", header.sect_alignment); 822 s->Printf (" file_alignment = 0x%8.8x\n", header.file_alignment); 823 s->Printf (" major_os_system_version = 0x%4.4x\n", header.major_os_system_version); 824 s->Printf (" minor_os_system_version = 0x%4.4x\n", header.minor_os_system_version); 825 s->Printf (" major_image_version = 0x%4.4x\n", header.major_image_version); 826 s->Printf (" minor_image_version = 0x%4.4x\n", header.minor_image_version); 827 s->Printf (" major_subsystem_version = 0x%4.4x\n", header.major_subsystem_version); 828 s->Printf (" minor_subsystem_version = 0x%4.4x\n", header.minor_subsystem_version); 829 s->Printf (" reserved1 = 0x%8.8x\n", header.reserved1); 830 s->Printf (" image_size = 0x%8.8x\n", header.image_size); 831 s->Printf (" header_size = 0x%8.8x\n", header.header_size); 832 s->Printf (" checksum = 0x%8.8x\n", header.checksum); 833 s->Printf (" subsystem = 0x%4.4x\n", header.subsystem); 834 s->Printf (" dll_flags = 0x%4.4x\n", header.dll_flags); 835 s->Printf (" stack_reserve_size = 0x%16.16" PRIx64 "\n", header.stack_reserve_size); 836 s->Printf (" stack_commit_size = 0x%16.16" PRIx64 "\n", header.stack_commit_size); 837 s->Printf (" heap_reserve_size = 0x%16.16" PRIx64 "\n", header.heap_reserve_size); 838 s->Printf (" heap_commit_size = 0x%16.16" PRIx64 "\n", header.heap_commit_size); 839 s->Printf (" loader_flags = 0x%8.8x\n", header.loader_flags); 840 s->Printf (" num_data_dir_entries = 0x%8.8zx\n", header.data_dirs.size()); 841 uint32_t i; 842 for (i=0; i<header.data_dirs.size(); i++) 843 { 844 s->Printf (" data_dirs[%2u] vmaddr = 0x%8.8x, vmsize = 0x%8.8x\n", 845 i, 846 header.data_dirs[i].vmaddr, 847 header.data_dirs[i].vmsize); 848 } 849 } 850 //---------------------------------------------------------------------- 851 // DumpSectionHeader 852 // 853 // Dump a single ELF section header to the specified output stream 854 //---------------------------------------------------------------------- 855 void 856 ObjectFilePECOFF::DumpSectionHeader(Stream *s, const section_header_t& sh) 857 { 858 std::string name; 859 GetSectionName(name, sh); 860 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", 861 name.c_str(), 862 sh.vmaddr, 863 sh.vmsize, 864 sh.offset, 865 sh.size, 866 sh.reloff, 867 sh.lineoff, 868 sh.nreloc, 869 sh.nline, 870 sh.flags); 871 } 872 873 874 //---------------------------------------------------------------------- 875 // DumpSectionHeaders 876 // 877 // Dump all of the ELF section header to the specified output stream 878 //---------------------------------------------------------------------- 879 void 880 ObjectFilePECOFF::DumpSectionHeaders(Stream *s) 881 { 882 883 s->PutCString ("Section Headers\n"); 884 s->PutCString ("IDX name vm addr vm size file off file size reloc off line off nreloc nline flags\n"); 885 s->PutCString ("==== ---------------- ---------- ---------- ---------- ---------- ---------- ---------- ------ ------ ----------\n"); 886 887 uint32_t idx = 0; 888 SectionHeaderCollIter pos, end = m_sect_headers.end(); 889 890 for (pos = m_sect_headers.begin(); pos != end; ++pos, ++idx) 891 { 892 s->Printf ("[%2u] ", idx); 893 ObjectFilePECOFF::DumpSectionHeader(s, *pos); 894 } 895 } 896 897 static bool 898 COFFMachineToMachCPU (uint16_t machine, ArchSpec &arch) 899 { 900 switch (machine) 901 { 902 case IMAGE_FILE_MACHINE_AMD64: 903 case IMAGE_FILE_MACHINE_IA64: 904 arch.SetArchitecture (eArchTypeMachO, 905 llvm::MachO::CPUTypeX86_64, 906 llvm::MachO::CPUSubType_X86_64_ALL); 907 return true; 908 909 case IMAGE_FILE_MACHINE_I386: 910 arch.SetArchitecture (eArchTypeMachO, 911 llvm::MachO::CPUTypeI386, 912 llvm::MachO::CPUSubType_I386_ALL); 913 return true; 914 915 case IMAGE_FILE_MACHINE_POWERPC: 916 case IMAGE_FILE_MACHINE_POWERPCFP: 917 arch.SetArchitecture (eArchTypeMachO, 918 llvm::MachO::CPUTypePowerPC, 919 llvm::MachO::CPUSubType_POWERPC_ALL); 920 return true; 921 case IMAGE_FILE_MACHINE_ARM: 922 case IMAGE_FILE_MACHINE_THUMB: 923 arch.SetArchitecture (eArchTypeMachO, 924 llvm::MachO::CPUTypeARM, 925 llvm::MachO::CPUSubType_ARM_V7); 926 return true; 927 } 928 return false; 929 } 930 bool 931 ObjectFilePECOFF::GetArchitecture (ArchSpec &arch) 932 { 933 // For index zero return our cpu type 934 return COFFMachineToMachCPU (m_coff_header.machine, arch); 935 } 936 937 ObjectFile::Type 938 ObjectFilePECOFF::CalculateType() 939 { 940 if (m_coff_header.machine != 0) 941 { 942 if ((m_coff_header.flags & IMAGE_FILE_DLL) == 0) 943 return eTypeExecutable; 944 else 945 return eTypeSharedLibrary; 946 } 947 return eTypeExecutable; 948 } 949 950 ObjectFile::Strata 951 ObjectFilePECOFF::CalculateStrata() 952 { 953 return eStrataUser; 954 } 955 //------------------------------------------------------------------ 956 // PluginInterface protocol 957 //------------------------------------------------------------------ 958 ConstString 959 ObjectFilePECOFF::GetPluginName() 960 { 961 return GetPluginNameStatic(); 962 } 963 964 uint32_t 965 ObjectFilePECOFF::GetPluginVersion() 966 { 967 return 1; 968 } 969 970