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 28static 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 116using namespace lldb; 117using namespace lldb_private; 118 119void 120ObjectFilePECOFF::Initialize() 121{ 122 PluginManager::RegisterPlugin (GetPluginNameStatic(), 123 GetPluginDescriptionStatic(), 124 CreateInstance, 125 CreateMemoryInstance, 126 GetModuleSpecifications); 127} 128 129void 130ObjectFilePECOFF::Terminate() 131{ 132 PluginManager::UnregisterPlugin (CreateInstance); 133} 134 135 136lldb_private::ConstString 137ObjectFilePECOFF::GetPluginNameStatic() 138{ 139 static ConstString g_name("pe-coff"); 140 return g_name; 141} 142 143const char * 144ObjectFilePECOFF::GetPluginDescriptionStatic() 145{ 146 return "Portable Executable and Common Object File Format object file reader (32 and 64 bit)"; 147} 148 149 150ObjectFile * 151ObjectFilePECOFF::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 176ObjectFile * 177ObjectFilePECOFF::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 185size_t 186ObjectFilePECOFF::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 197bool 198ObjectFilePECOFF::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 207ObjectFilePECOFF::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 225ObjectFilePECOFF::~ObjectFilePECOFF() 226{ 227} 228 229 230bool 231ObjectFilePECOFF::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 260ByteOrder 261ObjectFilePECOFF::GetByteOrder () const 262{ 263 return eByteOrderLittle; 264} 265 266bool 267ObjectFilePECOFF::IsExecutable() const 268{ 269 return (m_coff_header.flags & IMAGE_FILE_DLL) == 0; 270} 271 272uint32_t 273ObjectFilePECOFF::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//---------------------------------------------------------------------- 288bool 289ObjectFilePECOFF::NeedsEndianSwap() const 290{ 291#if defined(__LITTLE_ENDIAN__) 292 return false; 293#else 294 return true; 295#endif 296} 297//---------------------------------------------------------------------- 298// ParseDOSHeader 299//---------------------------------------------------------------------- 300bool 301ObjectFilePECOFF::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//---------------------------------------------------------------------- 358bool 359ObjectFilePECOFF::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 377bool 378ObjectFilePECOFF::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//---------------------------------------------------------------------- 449bool 450ObjectFilePECOFF::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 490bool 491ObjectFilePECOFF::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//---------------------------------------------------------------------- 513Symtab * 514ObjectFilePECOFF::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 = 18; 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, strtab_size)); 539 DataExtractor strtab_data (strtab_data_sp, GetByteOrder(), addr_byte_size); 540 541 // First 4 bytes should be zeroed after strtab_size has been read, 542 // because it is used as offset 0 to encode a NULL string. 543 uint32_t* strtab_data_start = (uint32_t*)strtab_data_sp->GetBytes(); 544 strtab_data_start[0] = 0; 545 546 offset = 0; 547 std::string symbol_name; 548 Symbol *symbols = m_symtab_ap->Resize (num_syms); 549 for (uint32_t i=0; i<num_syms; ++i) 550 { 551 coff_symbol_t symbol; 552 const uint32_t symbol_offset = offset; 553 const char *symbol_name_cstr = NULL; 554 // If the first 4 bytes of the symbol string are zero, then we 555 // it is followed by a 4 byte string table offset. Else these 556 // 8 bytes contain the symbol name 557 if (symtab_data.GetU32 (&offset) == 0) 558 { 559 // Long string that doesn't fit into the symbol table name, 560 // so now we must read the 4 byte string table offset 561 uint32_t strtab_offset = symtab_data.GetU32 (&offset); 562 symbol_name_cstr = strtab_data.PeekCStr (strtab_offset); 563 symbol_name.assign (symbol_name_cstr); 564 } 565 else 566 { 567 // Short string that fits into the symbol table name which is 8 bytes 568 offset += sizeof(symbol.name) - 4; // Skip remaining 569 symbol_name_cstr = symtab_data.PeekCStr (symbol_offset); 570 if (symbol_name_cstr == NULL) 571 break; 572 symbol_name.assign (symbol_name_cstr, sizeof(symbol.name)); 573 } 574 symbol.value = symtab_data.GetU32 (&offset); 575 symbol.sect = symtab_data.GetU16 (&offset); 576 symbol.type = symtab_data.GetU16 (&offset); 577 symbol.storage = symtab_data.GetU8 (&offset); 578 symbol.naux = symtab_data.GetU8 (&offset); 579 symbols[i].GetMangled ().SetValue (ConstString(symbol_name.c_str())); 580 if ((int16_t)symbol.sect >= 1) 581 { 582 Address symbol_addr(sect_list->GetSectionAtIndex(symbol.sect-1), symbol.value); 583 symbols[i].GetAddress() = symbol_addr; 584 } 585 586 if (symbol.naux > 0) 587 { 588 i += symbol.naux; 589 offset += symbol_size; 590 } 591 } 592 593 } 594 } 595 } 596 return m_symtab_ap.get(); 597 598} 599 600bool 601ObjectFilePECOFF::IsStripped () 602{ 603 // TODO: determine this for COFF 604 return false; 605} 606 607 608 609void 610ObjectFilePECOFF::CreateSections (SectionList &unified_section_list) 611{ 612 if (!m_sections_ap.get()) 613 { 614 m_sections_ap.reset(new SectionList()); 615 616 ModuleSP module_sp(GetModule()); 617 if (module_sp) 618 { 619 lldb_private::Mutex::Locker locker(module_sp->GetMutex()); 620 const uint32_t nsects = m_sect_headers.size(); 621 ModuleSP module_sp (GetModule()); 622 for (uint32_t idx = 0; idx<nsects; ++idx) 623 { 624 std::string sect_name; 625 GetSectionName (sect_name, m_sect_headers[idx]); 626 ConstString const_sect_name (sect_name.c_str()); 627 static ConstString g_code_sect_name (".code"); 628 static ConstString g_CODE_sect_name ("CODE"); 629 static ConstString g_data_sect_name (".data"); 630 static ConstString g_DATA_sect_name ("DATA"); 631 static ConstString g_bss_sect_name (".bss"); 632 static ConstString g_BSS_sect_name ("BSS"); 633 static ConstString g_debug_sect_name (".debug"); 634 static ConstString g_reloc_sect_name (".reloc"); 635 static ConstString g_stab_sect_name (".stab"); 636 static ConstString g_stabstr_sect_name (".stabstr"); 637 static ConstString g_sect_name_dwarf_debug_abbrev (".debug_abbrev"); 638 static ConstString g_sect_name_dwarf_debug_aranges (".debug_aranges"); 639 static ConstString g_sect_name_dwarf_debug_frame (".debug_frame"); 640 static ConstString g_sect_name_dwarf_debug_info (".debug_info"); 641 static ConstString g_sect_name_dwarf_debug_line (".debug_line"); 642 static ConstString g_sect_name_dwarf_debug_loc (".debug_loc"); 643 static ConstString g_sect_name_dwarf_debug_macinfo (".debug_macinfo"); 644 static ConstString g_sect_name_dwarf_debug_pubnames (".debug_pubnames"); 645 static ConstString g_sect_name_dwarf_debug_pubtypes (".debug_pubtypes"); 646 static ConstString g_sect_name_dwarf_debug_ranges (".debug_ranges"); 647 static ConstString g_sect_name_dwarf_debug_str (".debug_str"); 648 static ConstString g_sect_name_eh_frame (".eh_frame"); 649 SectionType section_type = eSectionTypeOther; 650 if (m_sect_headers[idx].flags & IMAGE_SCN_CNT_CODE && 651 ((const_sect_name == g_code_sect_name) || (const_sect_name == g_CODE_sect_name))) 652 { 653 section_type = eSectionTypeCode; 654 } 655 else if (m_sect_headers[idx].flags & IMAGE_SCN_CNT_INITIALIZED_DATA && 656 ((const_sect_name == g_data_sect_name) || (const_sect_name == g_DATA_sect_name))) 657 { 658 section_type = eSectionTypeData; 659 } 660 else if (m_sect_headers[idx].flags & IMAGE_SCN_CNT_UNINITIALIZED_DATA && 661 ((const_sect_name == g_bss_sect_name) || (const_sect_name == g_BSS_sect_name))) 662 { 663 if (m_sect_headers[idx].size == 0) 664 section_type = eSectionTypeZeroFill; 665 else 666 section_type = eSectionTypeData; 667 } 668 else if (const_sect_name == g_debug_sect_name) 669 { 670 section_type = eSectionTypeDebug; 671 } 672 else if (const_sect_name == g_stabstr_sect_name) 673 { 674 section_type = eSectionTypeDataCString; 675 } 676 else if (const_sect_name == g_reloc_sect_name) 677 { 678 section_type = eSectionTypeOther; 679 } 680 else if (const_sect_name == g_sect_name_dwarf_debug_abbrev) section_type = eSectionTypeDWARFDebugAbbrev; 681 else if (const_sect_name == g_sect_name_dwarf_debug_aranges) section_type = eSectionTypeDWARFDebugAranges; 682 else if (const_sect_name == g_sect_name_dwarf_debug_frame) section_type = eSectionTypeDWARFDebugFrame; 683 else if (const_sect_name == g_sect_name_dwarf_debug_info) section_type = eSectionTypeDWARFDebugInfo; 684 else if (const_sect_name == g_sect_name_dwarf_debug_line) section_type = eSectionTypeDWARFDebugLine; 685 else if (const_sect_name == g_sect_name_dwarf_debug_loc) section_type = eSectionTypeDWARFDebugLoc; 686 else if (const_sect_name == g_sect_name_dwarf_debug_macinfo) section_type = eSectionTypeDWARFDebugMacInfo; 687 else if (const_sect_name == g_sect_name_dwarf_debug_pubnames) section_type = eSectionTypeDWARFDebugPubNames; 688 else if (const_sect_name == g_sect_name_dwarf_debug_pubtypes) section_type = eSectionTypeDWARFDebugPubTypes; 689 else if (const_sect_name == g_sect_name_dwarf_debug_ranges) section_type = eSectionTypeDWARFDebugRanges; 690 else if (const_sect_name == g_sect_name_dwarf_debug_str) section_type = eSectionTypeDWARFDebugStr; 691 else if (const_sect_name == g_sect_name_eh_frame) section_type = eSectionTypeEHFrame; 692 else if (m_sect_headers[idx].flags & IMAGE_SCN_CNT_CODE) 693 { 694 section_type = eSectionTypeCode; 695 } 696 else if (m_sect_headers[idx].flags & IMAGE_SCN_CNT_INITIALIZED_DATA) 697 { 698 section_type = eSectionTypeData; 699 } 700 else if (m_sect_headers[idx].flags & IMAGE_SCN_CNT_UNINITIALIZED_DATA) 701 { 702 if (m_sect_headers[idx].size == 0) 703 section_type = eSectionTypeZeroFill; 704 else 705 section_type = eSectionTypeData; 706 } 707 708 // Use a segment ID of the segment index shifted left by 8 so they 709 // never conflict with any of the sections. 710 SectionSP section_sp (new Section (module_sp, // Module to which this section belongs 711 this, // Object file to which this section belongs 712 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 713 const_sect_name, // Name of this section 714 section_type, // This section is a container of other sections. 715 m_coff_header_opt.image_base + m_sect_headers[idx].vmaddr, // File VM address == addresses as they are found in the object file 716 m_sect_headers[idx].vmsize, // VM size in bytes of this section 717 m_sect_headers[idx].offset, // Offset to the data for this section in the file 718 m_sect_headers[idx].size, // Size in bytes of this section as found in the the file 719 m_sect_headers[idx].flags)); // Flags for this section 720 721 //section_sp->SetIsEncrypted (segment_is_encrypted); 722 723 unified_section_list.AddSection(section_sp); 724 m_sections_ap->AddSection (section_sp); 725 } 726 } 727 } 728} 729 730bool 731ObjectFilePECOFF::GetUUID (UUID* uuid) 732{ 733 return false; 734} 735 736uint32_t 737ObjectFilePECOFF::GetDependentModules (FileSpecList& files) 738{ 739 return 0; 740} 741 742 743//---------------------------------------------------------------------- 744// Dump 745// 746// Dump the specifics of the runtime file container (such as any headers 747// segments, sections, etc). 748//---------------------------------------------------------------------- 749void 750ObjectFilePECOFF::Dump(Stream *s) 751{ 752 ModuleSP module_sp(GetModule()); 753 if (module_sp) 754 { 755 lldb_private::Mutex::Locker locker(module_sp->GetMutex()); 756 s->Printf("%p: ", this); 757 s->Indent(); 758 s->PutCString("ObjectFilePECOFF"); 759 760 ArchSpec header_arch; 761 GetArchitecture (header_arch); 762 763 *s << ", file = '" << m_file << "', arch = " << header_arch.GetArchitectureName() << "\n"; 764 765 SectionList *sections = GetSectionList(); 766 if (sections) 767 sections->Dump(s, NULL, true, UINT32_MAX); 768 769 if (m_symtab_ap.get()) 770 m_symtab_ap->Dump(s, NULL, eSortOrderNone); 771 772 if (m_dos_header.e_magic) 773 DumpDOSHeader (s, m_dos_header); 774 if (m_coff_header.machine) 775 { 776 DumpCOFFHeader (s, m_coff_header); 777 if (m_coff_header.hdrsize) 778 DumpOptCOFFHeader (s, m_coff_header_opt); 779 } 780 s->EOL(); 781 DumpSectionHeaders(s); 782 s->EOL(); 783 } 784} 785 786//---------------------------------------------------------------------- 787// DumpDOSHeader 788// 789// Dump the MS-DOS header to the specified output stream 790//---------------------------------------------------------------------- 791void 792ObjectFilePECOFF::DumpDOSHeader(Stream *s, const dos_header_t& header) 793{ 794 s->PutCString ("MSDOS Header\n"); 795 s->Printf (" e_magic = 0x%4.4x\n", header.e_magic); 796 s->Printf (" e_cblp = 0x%4.4x\n", header.e_cblp); 797 s->Printf (" e_cp = 0x%4.4x\n", header.e_cp); 798 s->Printf (" e_crlc = 0x%4.4x\n", header.e_crlc); 799 s->Printf (" e_cparhdr = 0x%4.4x\n", header.e_cparhdr); 800 s->Printf (" e_minalloc = 0x%4.4x\n", header.e_minalloc); 801 s->Printf (" e_maxalloc = 0x%4.4x\n", header.e_maxalloc); 802 s->Printf (" e_ss = 0x%4.4x\n", header.e_ss); 803 s->Printf (" e_sp = 0x%4.4x\n", header.e_sp); 804 s->Printf (" e_csum = 0x%4.4x\n", header.e_csum); 805 s->Printf (" e_ip = 0x%4.4x\n", header.e_ip); 806 s->Printf (" e_cs = 0x%4.4x\n", header.e_cs); 807 s->Printf (" e_lfarlc = 0x%4.4x\n", header.e_lfarlc); 808 s->Printf (" e_ovno = 0x%4.4x\n", header.e_ovno); 809 s->Printf (" e_res[4] = { 0x%4.4x, 0x%4.4x, 0x%4.4x, 0x%4.4x }\n", 810 header.e_res[0], 811 header.e_res[1], 812 header.e_res[2], 813 header.e_res[3]); 814 s->Printf (" e_oemid = 0x%4.4x\n", header.e_oemid); 815 s->Printf (" e_oeminfo = 0x%4.4x\n", header.e_oeminfo); 816 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", 817 header.e_res2[0], 818 header.e_res2[1], 819 header.e_res2[2], 820 header.e_res2[3], 821 header.e_res2[4], 822 header.e_res2[5], 823 header.e_res2[6], 824 header.e_res2[7], 825 header.e_res2[8], 826 header.e_res2[9]); 827 s->Printf (" e_lfanew = 0x%8.8x\n", header.e_lfanew); 828} 829 830//---------------------------------------------------------------------- 831// DumpCOFFHeader 832// 833// Dump the COFF header to the specified output stream 834//---------------------------------------------------------------------- 835void 836ObjectFilePECOFF::DumpCOFFHeader(Stream *s, const coff_header_t& header) 837{ 838 s->PutCString ("COFF Header\n"); 839 s->Printf (" machine = 0x%4.4x\n", header.machine); 840 s->Printf (" nsects = 0x%4.4x\n", header.nsects); 841 s->Printf (" modtime = 0x%8.8x\n", header.modtime); 842 s->Printf (" symoff = 0x%8.8x\n", header.symoff); 843 s->Printf (" nsyms = 0x%8.8x\n", header.nsyms); 844 s->Printf (" hdrsize = 0x%4.4x\n", header.hdrsize); 845} 846 847//---------------------------------------------------------------------- 848// DumpOptCOFFHeader 849// 850// Dump the optional COFF header to the specified output stream 851//---------------------------------------------------------------------- 852void 853ObjectFilePECOFF::DumpOptCOFFHeader(Stream *s, const coff_opt_header_t& header) 854{ 855 s->PutCString ("Optional COFF Header\n"); 856 s->Printf (" magic = 0x%4.4x\n", header.magic); 857 s->Printf (" major_linker_version = 0x%2.2x\n", header.major_linker_version); 858 s->Printf (" minor_linker_version = 0x%2.2x\n", header.minor_linker_version); 859 s->Printf (" code_size = 0x%8.8x\n", header.code_size); 860 s->Printf (" data_size = 0x%8.8x\n", header.data_size); 861 s->Printf (" bss_size = 0x%8.8x\n", header.bss_size); 862 s->Printf (" entry = 0x%8.8x\n", header.entry); 863 s->Printf (" code_offset = 0x%8.8x\n", header.code_offset); 864 s->Printf (" data_offset = 0x%8.8x\n", header.data_offset); 865 s->Printf (" image_base = 0x%16.16" PRIx64 "\n", header.image_base); 866 s->Printf (" sect_alignment = 0x%8.8x\n", header.sect_alignment); 867 s->Printf (" file_alignment = 0x%8.8x\n", header.file_alignment); 868 s->Printf (" major_os_system_version = 0x%4.4x\n", header.major_os_system_version); 869 s->Printf (" minor_os_system_version = 0x%4.4x\n", header.minor_os_system_version); 870 s->Printf (" major_image_version = 0x%4.4x\n", header.major_image_version); 871 s->Printf (" minor_image_version = 0x%4.4x\n", header.minor_image_version); 872 s->Printf (" major_subsystem_version = 0x%4.4x\n", header.major_subsystem_version); 873 s->Printf (" minor_subsystem_version = 0x%4.4x\n", header.minor_subsystem_version); 874 s->Printf (" reserved1 = 0x%8.8x\n", header.reserved1); 875 s->Printf (" image_size = 0x%8.8x\n", header.image_size); 876 s->Printf (" header_size = 0x%8.8x\n", header.header_size); 877 s->Printf (" checksum = 0x%8.8x\n", header.checksum); 878 s->Printf (" subsystem = 0x%4.4x\n", header.subsystem); 879 s->Printf (" dll_flags = 0x%4.4x\n", header.dll_flags); 880 s->Printf (" stack_reserve_size = 0x%16.16" PRIx64 "\n", header.stack_reserve_size); 881 s->Printf (" stack_commit_size = 0x%16.16" PRIx64 "\n", header.stack_commit_size); 882 s->Printf (" heap_reserve_size = 0x%16.16" PRIx64 "\n", header.heap_reserve_size); 883 s->Printf (" heap_commit_size = 0x%16.16" PRIx64 "\n", header.heap_commit_size); 884 s->Printf (" loader_flags = 0x%8.8x\n", header.loader_flags); 885 s->Printf (" num_data_dir_entries = 0x%8.8zx\n", header.data_dirs.size()); 886 uint32_t i; 887 for (i=0; i<header.data_dirs.size(); i++) 888 { 889 s->Printf (" data_dirs[%2u] vmaddr = 0x%8.8x, vmsize = 0x%8.8x\n", 890 i, 891 header.data_dirs[i].vmaddr, 892 header.data_dirs[i].vmsize); 893 } 894} 895//---------------------------------------------------------------------- 896// DumpSectionHeader 897// 898// Dump a single ELF section header to the specified output stream 899//---------------------------------------------------------------------- 900void 901ObjectFilePECOFF::DumpSectionHeader(Stream *s, const section_header_t& sh) 902{ 903 std::string name; 904 GetSectionName(name, sh); 905 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", 906 name.c_str(), 907 sh.vmaddr, 908 sh.vmsize, 909 sh.offset, 910 sh.size, 911 sh.reloff, 912 sh.lineoff, 913 sh.nreloc, 914 sh.nline, 915 sh.flags); 916} 917 918 919//---------------------------------------------------------------------- 920// DumpSectionHeaders 921// 922// Dump all of the ELF section header to the specified output stream 923//---------------------------------------------------------------------- 924void 925ObjectFilePECOFF::DumpSectionHeaders(Stream *s) 926{ 927 928 s->PutCString ("Section Headers\n"); 929 s->PutCString ("IDX name vm addr vm size file off file size reloc off line off nreloc nline flags\n"); 930 s->PutCString ("==== ---------------- ---------- ---------- ---------- ---------- ---------- ---------- ------ ------ ----------\n"); 931 932 uint32_t idx = 0; 933 SectionHeaderCollIter pos, end = m_sect_headers.end(); 934 935 for (pos = m_sect_headers.begin(); pos != end; ++pos, ++idx) 936 { 937 s->Printf ("[%2u] ", idx); 938 ObjectFilePECOFF::DumpSectionHeader(s, *pos); 939 } 940} 941 942static bool 943COFFMachineToMachCPU (uint16_t machine, ArchSpec &arch) 944{ 945 switch (machine) 946 { 947 case IMAGE_FILE_MACHINE_AMD64: 948 case IMAGE_FILE_MACHINE_IA64: 949 arch.SetArchitecture (eArchTypeMachO, 950 llvm::MachO::CPUTypeX86_64, 951 llvm::MachO::CPUSubType_X86_64_ALL); 952 return true; 953 954 case IMAGE_FILE_MACHINE_I386: 955 arch.SetArchitecture (eArchTypeMachO, 956 llvm::MachO::CPUTypeI386, 957 llvm::MachO::CPUSubType_I386_ALL); 958 return true; 959 960 case IMAGE_FILE_MACHINE_POWERPC: 961 case IMAGE_FILE_MACHINE_POWERPCFP: 962 arch.SetArchitecture (eArchTypeMachO, 963 llvm::MachO::CPUTypePowerPC, 964 llvm::MachO::CPUSubType_POWERPC_ALL); 965 return true; 966 case IMAGE_FILE_MACHINE_ARM: 967 case IMAGE_FILE_MACHINE_THUMB: 968 arch.SetArchitecture (eArchTypeMachO, 969 llvm::MachO::CPUTypeARM, 970 llvm::MachO::CPUSubType_ARM_V7); 971 return true; 972 } 973 return false; 974} 975bool 976ObjectFilePECOFF::GetArchitecture (ArchSpec &arch) 977{ 978 // For index zero return our cpu type 979 return COFFMachineToMachCPU (m_coff_header.machine, arch); 980} 981 982ObjectFile::Type 983ObjectFilePECOFF::CalculateType() 984{ 985 if (m_coff_header.machine != 0) 986 { 987 if ((m_coff_header.flags & IMAGE_FILE_DLL) == 0) 988 return eTypeExecutable; 989 else 990 return eTypeSharedLibrary; 991 } 992 return eTypeExecutable; 993} 994 995ObjectFile::Strata 996ObjectFilePECOFF::CalculateStrata() 997{ 998 return eStrataUser; 999} 1000//------------------------------------------------------------------ 1001// PluginInterface protocol 1002//------------------------------------------------------------------ 1003ConstString 1004ObjectFilePECOFF::GetPluginName() 1005{ 1006 return GetPluginNameStatic(); 1007} 1008 1009uint32_t 1010ObjectFilePECOFF::GetPluginVersion() 1011{ 1012 return 1; 1013} 1014 1015