scripts/readelf.py

   1 #!/usr/bin/env python
   2 #-------------------------------------------------------------------------------
   3 # scripts/readelf.py
   4 #
   5 # A clone of 'readelf' in Python, based on the pyelftools library
   6 #
   7 # Eli Bendersky (eliben@gmail.com)
   8 # This code is in the public domain
   9 #-------------------------------------------------------------------------------
  10 import os, sys
  11 from optparse import OptionParser
  12 import string
  13
  14
  15 # If elftools is not installed, maybe we're running from the root or scripts
  16 # dir of the source distribution
  17 #
  18 try:
  19     import elftools
  20 except ImportError:
  21     sys.path.extend(['.', '..'])
  22
  23 from elftools import __version__
  24 from elftools.common.exceptions import ELFError
  25 from elftools.elf.elffile import ELFFile
  26 from elftools.elf.segments import InterpSegment
  27 from elftools.elf.sections import SymbolTableSection, RelocationSection
  28 from elftools.elf.descriptions import (
  29     describe_ei_class, describe_ei_data, describe_ei_version,
  30     describe_ei_osabi, describe_e_type, describe_e_machine,
  31     describe_e_version_numeric, describe_p_type, describe_p_flags,
  32     describe_sh_type, describe_sh_flags,
  33     describe_symbol_type, describe_symbol_bind, describe_symbol_visibility,
  34     describe_symbol_shndx, describe_reloc_type,
  35     )
  36 from elftools.dwarf.dwarfinfo import DWARFInfo, DebugSectionLocator
  37 from elftools.dwarf.descriptions import describe_attr_value
  38
  39
  40 class ReadElf(object):
  41     """ display_* methods are used to emit output into the output stream
  42     """
  43     def __init__(self, file, output):
  44         """ file:
  45                 stream object with the ELF file to read
  46
  47             output:
  48                 output stream to write to
  49         """
  50         self.elffile = ELFFile(file)
  51         self.output = output
  52
  53         # Lazily initialized if a debug dump is requested
  54         self._dwarfinfo = None
  55
  56     def display_file_header(self):
  57         """ Display the ELF file header
  58         """
  59         self._emitline('ELF Header:')
  60         self._emit('  Magic:   ')
  61         self._emitline(' '.join('%2.2x' % ord(b)
  62                                     for b in self.elffile.e_ident_raw))
  63         header = self.elffile.header
  64         e_ident = header['e_ident']
  65         self._emitline('  Class:                             %s' %
  66                 describe_ei_class(e_ident['EI_CLASS']))
  67         self._emitline('  Data:                              %s' %
  68                 describe_ei_data(e_ident['EI_DATA']))
  69         self._emitline('  Version:                           %s' %
  70                 describe_ei_version(e_ident['EI_VERSION']))
  71         self._emitline('  OS/ABI:                            %s' %
  72                 describe_ei_osabi(e_ident['EI_OSABI']))
  73         self._emitline('  ABI Version:                       %d' %
  74                 e_ident['EI_ABIVERSION'])
  75         self._emitline('  Type:                              %s' %
  76                 describe_e_type(header['e_type']))
  77         self._emitline('  Machine:                           %s' %
  78                 describe_e_machine(header['e_machine']))
  79         self._emitline('  Version:                           %s' %
  80                 describe_e_version_numeric(header['e_version']))
  81         self._emitline('  Entry point address:               %s' %
  82                 self._format_hex(header['e_entry']))
  83         self._emit('  Start of program headers:          %s' %
  84                 header['e_phoff'])
  85         self._emitline(' (bytes into file)')
  86         self._emit('  Start of section headers:          %s' %
  87                 header['e_shoff'])
  88         self._emitline(' (bytes into file)')
  89         self._emitline('  Flags:                             %s' %
  90                 self._format_hex(header['e_flags']))
  91         self._emitline('  Size of this header:               %s (bytes)' %
  92                 header['e_ehsize'])
  93         self._emitline('  Size of program headers:           %s (bytes)' %
  94                 header['e_phentsize'])
  95         self._emitline('  Number of program headers:         %s' %
  96                 header['e_phnum'])
  97         self._emitline('  Size of section headers:           %s (bytes)' %
  98                 header['e_shentsize'])
  99         self._emitline('  Number of section headers:         %s' %
 100                 header['e_shnum'])
 101         self._emitline('  Section header string table index: %s' %
 102                 header['e_shstrndx'])
 103
 104     def display_program_headers(self, show_heading=True):
 105         """ Display the ELF program headers.
 106             If show_heading is True, displays the heading for this information
 107             (Elf file type is...)
 108         """
 109         self._emitline()
 110         if self.elffile.num_segments() == 0:
 111             self._emitline('There are no program headers in this file.')
 112             return
 113
 114         elfheader = self.elffile.header
 115         if show_heading:
 116             self._emitline('Elf file type is %s' %
 117                 describe_e_type(elfheader['e_type']))
 118             self._emitline('Entry point is %s' %
 119                 self._format_hex(elfheader['e_entry']))
 120             # readelf weirness - why isn't e_phoff printed as hex? (for section
 121             # headers, it is...)
 122             self._emitline('There are %s program headers, starting at offset %s' % (
 123                 elfheader['e_phnum'], elfheader['e_phoff']))
 124             self._emitline()
 125
 126         self._emitline('Program Headers:')
 127
 128         # Now comes the table of program headers with their attributes. Note
 129         # that due to different formatting constraints of 32-bit and 64-bit
 130         # addresses, there are some conditions on elfclass here.
 131         #
 132         # First comes the table heading
 133         #
 134         if self.elffile.elfclass == 32:
 135             self._emitline('  Type           Offset   VirtAddr   PhysAddr   FileSiz MemSiz  Flg Align')
 136         else:
 137             self._emitline('  Type           Offset             VirtAddr           PhysAddr')
 138             self._emitline('                 FileSiz            MemSiz              Flags  Align')
 139
 140         # Now the entries
 141         #
 142         for segment in self.elffile.iter_segments():
 143             self._emit('  %-14s ' % describe_p_type(segment['p_type']))
 144
 145             if self.elffile.elfclass == 32:
 146                 self._emitline('%s %s %s %s %s %-3s %s' % (
 147                     self._format_hex(segment['p_offset'], fieldsize=6),
 148                     self._format_hex(segment['p_vaddr'], fullhex=True),
 149                     self._format_hex(segment['p_paddr'], fullhex=True),
 150                     self._format_hex(segment['p_filesz'], fieldsize=5),
 151                     self._format_hex(segment['p_memsz'], fieldsize=5),
 152                     describe_p_flags(segment['p_flags']),
 153                     self._format_hex(segment['p_align'])))
 154             else: # 64
 155                 self._emitline('%s %s %s' % (
 156                     self._format_hex(segment['p_offset'], fullhex=True),
 157                     self._format_hex(segment['p_vaddr'], fullhex=True),
 158                     self._format_hex(segment['p_paddr'], fullhex=True)))
 159                 self._emitline('                 %s %s  %-3s    %s' % (
 160                     self._format_hex(segment['p_filesz'], fullhex=True),
 161                     self._format_hex(segment['p_memsz'], fullhex=True),
 162                     describe_p_flags(segment['p_flags']),
 163                     # lead0x set to False for p_align, to mimic readelf.
 164                     # No idea why the difference from 32-bit mode :-|
 165                     self._format_hex(segment['p_align'], lead0x=False)))
 166
 167             if isinstance(segment, InterpSegment):
 168                 self._emitline('      [Requesting program interpreter: %s]' %
 169                     segment.get_interp_name())
 170
 171         # Sections to segments mapping
 172         #
 173         if self.elffile.num_sections() == 0:
 174             # No sections? We're done
 175             return
 176
 177         self._emitline('\n Section to Segment mapping:')
 178         self._emitline('  Segment Sections...')
 179
 180         for nseg, segment in enumerate(self.elffile.iter_segments()):
 181             self._emit('   %2.2d     ' % nseg)
 182
 183             for section in self.elffile.iter_sections():
 184                 if (    not section.is_null() and
 185                         segment.section_in_segment(section)):
 186                     self._emit('%s ' % section.name)
 187
 188             self._emitline('')
 189
 190     def display_section_headers(self, show_heading=True):
 191         """ Display the ELF section headers
 192         """
 193         elfheader = self.elffile.header
 194         if show_heading:
 195             self._emitline('There are %s section headers, starting at offset %s' % (
 196                 elfheader['e_shnum'], self._format_hex(elfheader['e_shoff'])))
 197
 198         self._emitline('\nSection Header%s:' % (
 199             's' if elfheader['e_shnum'] > 1 else ''))
 200
 201         # Different formatting constraints of 32-bit and 64-bit addresses
 202         #
 203         if self.elffile.elfclass == 32:
 204             self._emitline('  [Nr] Name              Type            Addr     Off    Size   ES Flg Lk Inf Al')
 205         else:
 206             self._emitline('  [Nr] Name              Type             Address           Offset')
 207             self._emitline('       Size              EntSize          Flags  Link  Info  Align')
 208
 209         # Now the entries
 210         #
 211         for nsec, section in enumerate(self.elffile.iter_sections()):
 212             self._emit('  [%2u] %-17.17s %-15.15s ' % (
 213                 nsec, section.name, describe_sh_type(section['sh_type'])))
 214
 215             if self.elffile.elfclass == 32:
 216                 self._emitline('%s %s %s %s %3s %2s %3s %2s' % (
 217                     self._format_hex(section['sh_addr'], fieldsize=8, lead0x=False),
 218                     self._format_hex(section['sh_offset'], fieldsize=6, lead0x=False),
 219                     self._format_hex(section['sh_size'], fieldsize=6, lead0x=False),
 220                     self._format_hex(section['sh_entsize'], fieldsize=2, lead0x=False),
 221                     describe_sh_flags(section['sh_flags']),
 222                     section['sh_link'], section['sh_info'],
 223                     section['sh_addralign']))
 224             else: # 64
 225                 self._emitline(' %s  %s' % (
 226                     self._format_hex(section['sh_addr'], fullhex=True, lead0x=False),
 227                     self._format_hex(section['sh_offset'],
 228                         fieldsize=16 if section['sh_offset'] > 0xffffffff else 8,
 229                         lead0x=False)))
 230                 self._emitline('       %s  %s %3s      %2s   %3s     %s' % (
 231                     self._format_hex(section['sh_size'], fullhex=True, lead0x=False),
 232                     self._format_hex(section['sh_entsize'], fullhex=True, lead0x=False),
 233                     describe_sh_flags(section['sh_flags']),
 234                     section['sh_link'], section['sh_info'],
 235                     section['sh_addralign']))
 236
 237         self._emitline('Key to Flags:')
 238         self._emitline('  W (write), A (alloc), X (execute), M (merge), S (strings)')
 239         self._emitline('  I (info), L (link order), G (group), x (unknown)')
 240         self._emitline('  O (extra OS processing required) o (OS specific), p (processor specific)')
 241
 242     def display_symbol_tables(self):
 243         """ Display the symbol tables contained in the file
 244         """
 245         for section in self.elffile.iter_sections():
 246             if not isinstance(section, SymbolTableSection):
 247                 continue
 248
 249             if section['sh_entsize'] == 0:
 250                 self._emitline("\nSymbol table '%s' has a sh_entsize of zero!" % (
 251                     section.name))
 252                 continue
 253
 254             self._emitline("\nSymbol table '%s' contains %s entries:" % (
 255                 section.name, section.num_symbols()))
 256
 257             if self.elffile.elfclass == 32:
 258                 self._emitline('   Num:    Value  Size Type    Bind   Vis      Ndx Name')
 259             else: # 64
 260                 self._emitline('   Num:    Value          Size Type    Bind   Vis      Ndx Name')
 261
 262             for nsym, symbol in enumerate(section.iter_symbols()):
 263                 # symbol names are truncated to 25 chars, similarly to readelf
 264                 self._emitline('%6d: %s %5d %-7s %-6s %-7s %4s %.25s' % (
 265                     nsym,
 266                     self._format_hex(symbol['st_value'], fullhex=True, lead0x=False),
 267                     symbol['st_size'],
 268                     describe_symbol_type(symbol['st_info']['type']),
 269                     describe_symbol_bind(symbol['st_info']['bind']),
 270                     describe_symbol_visibility(symbol['st_other']['visibility']),
 271                     describe_symbol_shndx(symbol['st_shndx']),
 272                     symbol.name))
 273
 274     def display_relocations(self):
 275         """ Display the relocations contained in the file
 276         """
 277         has_relocation_sections = False
 278         for section in self.elffile.iter_sections():
 279             if not isinstance(section, RelocationSection):
 280                 continue
 281
 282             has_relocation_sections = True
 283             self._emitline("\nRelocation section '%s' at offset %s contains %s entries:" % (
 284                 section.name,
 285                 self._format_hex(section['sh_offset']),
 286                 section.num_relocations()))
 287             if section.is_RELA():
 288                 self._emitline("  Offset          Info           Type           Sym. Value    Sym. Name + Addend")
 289             else:
 290                 self._emitline(" Offset     Info    Type            Sym.Value  Sym. Name")
 291
 292             # The symbol table section pointed to in sh_link
 293             symtable = self.elffile.get_section(section['sh_link'])
 294
 295             for rel in section.iter_relocations():
 296                 hexwidth = 8 if self.elffile.elfclass == 32 else 12
 297                 self._emit('%s  %s %-17.17s' % (
 298                     self._format_hex(rel['r_offset'],
 299                         fieldsize=hexwidth, lead0x=False),
 300                     self._format_hex(rel['r_info'],
 301                         fieldsize=hexwidth, lead0x=False),
 302                     describe_reloc_type(
 303                         rel['r_info_type'], self.elffile['e_machine'])))
 304
 305                 if rel['r_info_sym'] == 0:
 306                     self._emitline()
 307                     continue
 308
 309                 symbol = symtable.get_symbol(rel['r_info_sym'])
 310                 # Some symbols have zero 'st_name', so instead what's used is
 311                 # the name of the section they point at
 312                 if symbol['st_name'] == 0:
 313                     symsec = self.elffile.get_section(symbol['st_shndx'])
 314                     symbol_name = symsec.name
 315                 else:
 316                     symbol_name = symbol.name
 317                 self._emit(' %s %s%22.22s' % (
 318                     self._format_hex(
 319                         symbol['st_value'],
 320                         fullhex=True, lead0x=False),
 321                     '  ' if self.elffile.elfclass == 32 else '',
 322                     symbol_name))
 323                 if section.is_RELA():
 324                     self._emit(' %s %x' % (
 325                         '+' if rel['r_addend'] >= 0 else '-',
 326                         abs(rel['r_addend'])))
 327                 self._emitline()
 328
 329         if not has_relocation_sections:
 330             self._emitline('\nThere are no relocations in this file.')
 331
 332     def display_hex_dump(self, section_spec):
 333         """ Display a hex dump of a section. section_spec is either a section
 334             number or a name.
 335         """
 336         section = self._section_from_spec(section_spec)
 337         if section is None:
 338             self._emitline("Section '%s' does not exist in the file!" % (
 339                 section_spec))
 340             return
 341
 342         self._emitline("\nHex dump of section '%s':" % section.name)
 343         self._note_relocs_for_section(section)
 344         addr = section['sh_addr']
 345         data = section.data()
 346         dataptr = 0
 347
 348         while dataptr < len(data):
 349             bytesleft = len(data) - dataptr
 350             # chunks of 16 bytes per line
 351             linebytes = 16 if bytesleft > 16 else bytesleft
 352
 353             self._emit('  %s ' % self._format_hex(addr, fieldsize=8))
 354             for i in range(16):
 355                 if i < linebytes:
 356                     self._emit('%2.2x' % ord(data[dataptr + i]))
 357                 else:
 358                     self._emit('  ')
 359                 if i % 4 == 3:
 360                     self._emit(' ')
 361
 362             for i in range(linebytes):
 363                 c = data[dataptr + i]
 364                 if c >= ' ' and ord(c) < 0x7f:
 365                     self._emit(c)
 366                 else:
 367                     self._emit('.')
 368
 369             self._emitline()
 370             addr += linebytes
 371             dataptr += linebytes
 372
 373         self._emitline()
 374
 375     def display_string_dump(self, section_spec):
 376         """ Display a strings dump of a section. section_spec is either a
 377             section number or a name.
 378         """
 379         section = self._section_from_spec(section_spec)
 380         if section is None:
 381             self._emitline("Section '%s' does not exist in the file!" % (
 382                 section_spec))
 383             return
 384
 385         printables = set(string.printable)
 386         self._emitline("\nString dump of section '%s':" % section.name)
 387
 388         found = False
 389         data = section.data()
 390         dataptr = 0
 391
 392         while dataptr < len(data):
 393             while dataptr < len(data) and data[dataptr] not in printables:
 394                 dataptr += 1
 395
 396             if dataptr >= len(data):
 397                 break
 398
 399             endptr = dataptr
 400             while endptr < len(data) and data[endptr] != '\x00':
 401                 endptr += 1
 402
 403             found = True
 404             self._emitline('  [%6x]  %s' % (
 405                 dataptr, data[dataptr:endptr]))
 406
 407             dataptr = endptr
 408
 409         if not found:
 410             self._emitline('  No strings found in this section.')
 411         else:
 412             self._emitline()
 413
 414     def display_debug_dump(self, section_name):
 415         """ Dump a DWARF section
 416         """
 417         self._init_dwarfinfo()
 418         if self._dwarfinfo is None:
 419             return
 420
 421         if section_name == 'info':
 422             self._dump_debug_info()
 423         else:
 424             self._emitline('debug dump not yet supported for "%s"' % section_name)
 425
 426     def _format_hex(self, addr, fieldsize=None, fullhex=False, lead0x=True):
 427         """ Format an address into a hexadecimal string.
 428
 429             fieldsize:
 430                 Size of the hexadecimal field (with leading zeros to fit the
 431                 address into. For example with fieldsize=8, the format will
 432                 be %08x
 433                 If None, the minimal required field size will be used.
 434
 435             fullhex:
 436                 If True, override fieldsize to set it to the maximal size
 437                 needed for the elfclass
 438
 439             lead0x:
 440                 If True, leading 0x is added
 441         """
 442         s = '0x' if lead0x else ''
 443         if fullhex:
 444             fieldsize = 8 if self.elffile.elfclass == 32 else 16
 445         if fieldsize is None:
 446             field = '%x'
 447         else:
 448             field = '%' + '0%sx' % fieldsize
 449         return s + field % addr
 450
 451     def _section_from_spec(self, spec):
 452         """ Retrieve a section given a "spec" (either number or name).
 453             Return None if no such section exists in the file.
 454         """
 455         try:
 456             num = int(spec)
 457             if num < self.elffile.num_sections():
 458                 return self.elffile.get_section(num)
 459             else:
 460                 return None
 461         except ValueError:
 462             # Not a number. Must be a name then
 463             return self.elffile.get_section_by_name(spec)
 464
 465     def _note_relocs_for_section(self, section):
 466         """ If there are relocation sections pointing to the givne section,
 467             emit a note about it.
 468         """
 469         for relsec in self.elffile.iter_sections():
 470             if isinstance(relsec, RelocationSection):
 471                 info_idx = relsec['sh_info']
 472                 if self.elffile.get_section(info_idx) == section:
 473                     self._emitline('  Note: This section has relocations against it, but these have NOT been applied to this dump.')
 474                     return
 475
 476     def _init_dwarfinfo(self):
 477         """ Initialize the DWARF info contained in the file and assign it to
 478             self._dwarfinfo.
 479             Leave self._dwarfinfo at None if no DWARF info was found in the file
 480         """
 481         if self._dwarfinfo is not None:
 482             return
 483
 484         if self.elffile.has_dwarf_info():
 485             self._dwarfinfo = self.elffile.get_dwarf_info()
 486         else:
 487             self._dwarfinfo = None
 488
 489     def _dump_debug_info(self):
 490         """ Dump the debugging info section.
 491         """
 492         # Offset of the .debug_info section in the stream
 493         section_offset = self._dwarfinfo.debug_info_loc.offset
 494
 495         for cu in self._dwarfinfo.iter_CUs():
 496             self._emitline('  Compilation Unit @ offset %s' %
 497                 self._format_hex(cu.cu_offset - section_offset))
 498             self._emitline('   Length:        %s (%s)' % (
 499                 self._format_hex(cu['unit_length']),
 500                 '%s-bit' % cu.dwarf_format()))
 501             self._emitline('   Version:       %s' % cu['version']),
 502             self._emitline('   Abbrev Offset: %s' % cu['debug_abbrev_offset']),
 503             self._emitline('   Pointer Size:  %s' % cu['address_size'])
 504
 505             # The nesting depth of each DIE within the tree of DIEs must be
 506             # displayed. To implement this, a counter is incremented each time
 507             # the current DIE has children, and decremented when a null die is
 508             # encountered. Due to the way the DIE tree is serialized, this will
 509             # correctly reflect the nesting depth
 510             #
 511             die_depth = 0
 512             for die in cu.iter_DIEs():
 513                 if die.is_null():
 514                     die_depth -= 1
 515                     continue
 516                 self._emitline(' <%s><%x>: Abbrev Number: %s (%s)' % (
 517                     die_depth,
 518                     die.offset - section_offset,
 519                     die.abbrev_code,
 520                     die.tag))
 521
 522                 for attrname, attr in die.attributes.iteritems():
 523                     self._emitline('    <%2x>   %-18s: %s' % (
 524                         attr.offset - section_offset,
 525                         attrname,
 526                         describe_attr_value(
 527                             attr, die, section_offset)))
 528
 529                 if die.has_children:
 530                     die_depth += 1
 531
 532
 533     def _emit(self, s=''):
 534         """ Emit an object to output
 535         """
 536         self.output.write(str(s))
 537
 538     def _emitline(self, s=''):
 539         """ Emit an object to output, followed by a newline
 540         """
 541         self.output.write(str(s) + '\n')
 542
 543
 544 SCRIPT_DESCRIPTION = 'Display information about the contents of ELF format files'
 545 VERSION_STRING = '%%prog: based on pyelftools %s' % __version__
 546
 547
 548 def main():
 549     # parse the command-line arguments and invoke ReadElf
 550     optparser = OptionParser(
 551             usage='usage: %prog [options] <elf-file>',
 552             description=SCRIPT_DESCRIPTION,
 553             add_help_option=False, # -h is a real option of readelf
 554             prog='readelf.py',
 555             version=VERSION_STRING)
 556     optparser.add_option('-H', '--help',
 557             action='store_true', dest='help',
 558             help='Display this information')
 559     optparser.add_option('-h', '--file-header',
 560             action='store_true', dest='show_file_header',
 561             help='Display the ELF file header')
 562     optparser.add_option('-l', '--program-headers', '--segments',
 563             action='store_true', dest='show_program_header',
 564             help='Display the program headers')
 565     optparser.add_option('-S', '--section-headers', '--sections',
 566             action='store_true', dest='show_section_header',
 567             help="Display the sections' headers")
 568     optparser.add_option('-e', '--headers',
 569             action='store_true', dest='show_all_headers',
 570             help='Equivalent to: -h -l -S')
 571     optparser.add_option('-s', '--symbols', '--syms',
 572             action='store_true', dest='show_symbols',
 573             help='Display the symbol table')
 574     optparser.add_option('-r', '--relocs',
 575             action='store_true', dest='show_relocs',
 576             help='Display the relocations (if present)')
 577     optparser.add_option('-x', '--hex-dump',
 578             action='store', dest='show_hex_dump', metavar='<number|name>',
 579             help='Dump the contents of section <number|name> as bytes')
 580     optparser.add_option('-p', '--string-dump',
 581             action='store', dest='show_string_dump', metavar='<number|name>',
 582             help='Dump the contents of section <number|name> as strings')
 583     optparser.add_option('--debug-dump',
 584             action='store', dest='debug_dump_section', metavar='<section>',
 585             help='Display the contents of DWARF debug sections')
 586
 587     options, args = optparser.parse_args()
 588
 589     if options.help or len(args) == 0:
 590         optparser.print_help()
 591         sys.exit(0)
 592
 593     if options.show_all_headers:
 594         do_file_header = do_section_header = do_program_header = True
 595     else:
 596         do_file_header = options.show_file_header
 597         do_section_header = options.show_section_header
 598         do_program_header = options.show_program_header
 599
 600     with open(args[0], 'rb') as file:
 601         try:
 602             readelf = ReadElf(file, sys.stdout)
 603             if do_file_header:
 604                 readelf.display_file_header()
 605             if do_section_header:
 606                 readelf.display_section_headers(
 607                         show_heading=not do_file_header)
 608             if do_program_header:
 609                 readelf.display_program_headers(
 610                         show_heading=not do_file_header)
 611             if options.show_symbols:
 612                 readelf.display_symbol_tables()
 613             if options.show_relocs:
 614                 readelf.display_relocations()
 615             if options.show_hex_dump:
 616                 readelf.display_hex_dump(options.show_hex_dump)
 617             if options.show_string_dump:
 618                 readelf.display_string_dump(options.show_string_dump)
 619             if options.debug_dump_section:
 620                 readelf.display_debug_dump(options.debug_dump_section)
 621         except ELFError as ex:
 622             sys.stderr.write('ELF error: %s\n' % ex)
 623             sys.exit(1)
 624
 625
 626 #-------------------------------------------------------------------------------
 627 if __name__ == '__main__':
 628     main()
 629