elftools/elf/descriptions.py

   1 #-------------------------------------------------------------------------------
   2 # elftools: elf/descriptions.py
   3 #
   4 # Textual descriptions of the various enums and flags of ELF
   5 #
   6 # Eli Bendersky (eliben@gmail.com)
   7 # This code is in the public domain
   8 #-------------------------------------------------------------------------------
   9 from .enums import (
  10     ENUM_D_TAG, ENUM_E_VERSION, ENUM_P_TYPE_BASE, ENUM_SH_TYPE_BASE,
  11     ENUM_RELOC_TYPE_i386, ENUM_RELOC_TYPE_x64,
  12     ENUM_RELOC_TYPE_ARM, ENUM_RELOC_TYPE_AARCH64, ENUM_RELOC_TYPE_PPC64,
  13     ENUM_RELOC_TYPE_MIPS, ENUM_ATTR_TAG_ARM, ENUM_DT_FLAGS, ENUM_DT_FLAGS_1)
  14 from .constants import (
  15     P_FLAGS, RH_FLAGS, SH_FLAGS, SUNW_SYMINFO_FLAGS, VER_FLAGS)
  16 from ..common.py3compat import iteritems
  17
  18
  19 def describe_ei_class(x):
  20     return _DESCR_EI_CLASS.get(x, _unknown)
  21
  22
  23 def describe_ei_data(x):
  24     return _DESCR_EI_DATA.get(x, _unknown)
  25
  26
  27 def describe_ei_version(x):
  28     s = '%d' % ENUM_E_VERSION[x]
  29     if x == 'EV_CURRENT':
  30         s += ' (current)'
  31     return s
  32
  33
  34 def describe_ei_osabi(x):
  35     return _DESCR_EI_OSABI.get(x, _unknown)
  36
  37
  38 def describe_e_type(x):
  39     return _DESCR_E_TYPE.get(x, _unknown)
  40
  41
  42 def describe_e_machine(x):
  43     return _DESCR_E_MACHINE.get(x, _unknown)
  44
  45
  46 def describe_e_version_numeric(x):
  47     return '0x%x' % ENUM_E_VERSION[x]
  48
  49
  50 def describe_p_type(x):
  51     if x in _DESCR_P_TYPE:
  52         return _DESCR_P_TYPE.get(x)
  53     elif x >= ENUM_P_TYPE_BASE['PT_LOOS'] and x <= ENUM_P_TYPE_BASE['PT_HIOS']:
  54         return 'LOOS+%lx' % (x - ENUM_P_TYPE_BASE['PT_LOOS'])
  55     else:
  56         return _unknown
  57
  58
  59 def describe_p_flags(x):
  60     s = ''
  61     for flag in (P_FLAGS.PF_R, P_FLAGS.PF_W, P_FLAGS.PF_X):
  62         s += _DESCR_P_FLAGS[flag] if (x & flag) else ' '
  63     return s
  64
  65
  66 def describe_rh_flags(x):
  67     return ' '.join(
  68         _DESCR_RH_FLAGS[flag]
  69         for flag in (RH_FLAGS.RHF_NONE, RH_FLAGS.RHF_QUICKSTART,
  70                      RH_FLAGS.RHF_NOTPOT, RH_FLAGS.RHF_NO_LIBRARY_REPLACEMENT,
  71                      RH_FLAGS.RHF_NO_MOVE, RH_FLAGS.RHF_SGI_ONLY,
  72                      RH_FLAGS.RHF_GUARANTEE_INIT,
  73                      RH_FLAGS.RHF_DELTA_C_PLUS_PLUS,
  74                      RH_FLAGS.RHF_GUARANTEE_START_INIT, RH_FLAGS.RHF_PIXIE,
  75                      RH_FLAGS.RHF_DEFAULT_DELAY_LOAD,
  76                      RH_FLAGS.RHF_REQUICKSTART, RH_FLAGS.RHF_REQUICKSTARTED,
  77                      RH_FLAGS.RHF_CORD, RH_FLAGS.RHF_NO_UNRES_UNDEF,
  78                      RH_FLAGS.RHF_RLD_ORDER_SAFE)
  79         if x & flag)
  80
  81
  82 def describe_sh_type(x):
  83     if x in _DESCR_SH_TYPE:
  84         return _DESCR_SH_TYPE.get(x)
  85     elif (x >= ENUM_SH_TYPE_BASE['SHT_LOOS'] and
  86           x < ENUM_SH_TYPE_BASE['SHT_GNU_versym']):
  87         return 'loos+0x%lx' % (x - ENUM_SH_TYPE_BASE['SHT_LOOS'])
  88     else:
  89         return _unknown
  90
  91
  92 def describe_sh_flags(x):
  93     s = ''
  94     for flag in (
  95             SH_FLAGS.SHF_WRITE, SH_FLAGS.SHF_ALLOC, SH_FLAGS.SHF_EXECINSTR,
  96             SH_FLAGS.SHF_MERGE, SH_FLAGS.SHF_STRINGS, SH_FLAGS.SHF_INFO_LINK,
  97             SH_FLAGS.SHF_LINK_ORDER, SH_FLAGS.SHF_OS_NONCONFORMING,
  98             SH_FLAGS.SHF_GROUP, SH_FLAGS.SHF_TLS, SH_FLAGS.SHF_MASKOS,
  99             SH_FLAGS.SHF_EXCLUDE):
 100         s += _DESCR_SH_FLAGS[flag] if (x & flag) else ''
 101     if not x & SH_FLAGS.SHF_EXCLUDE:
 102         if x & SH_FLAGS.SHF_MASKPROC:
 103             s += 'p'
 104     return s
 105
 106
 107 def describe_symbol_type(x):
 108     return _DESCR_ST_INFO_TYPE.get(x, _unknown)
 109
 110
 111 def describe_symbol_bind(x):
 112     return _DESCR_ST_INFO_BIND.get(x, _unknown)
 113
 114
 115 def describe_symbol_visibility(x):
 116     return _DESCR_ST_VISIBILITY.get(x, _unknown)
 117
 118
 119 def describe_symbol_local(x):
 120     return '[<localentry>: ' + str(1 << x) + ']'
 121
 122
 123 def describe_symbol_other(x):
 124     vis = describe_symbol_visibility(x['visibility'])
 125     if x['local'] > 1 and x['local'] < 7:
 126         return vis + ' ' + describe_symbol_local(x['local'])
 127     return vis
 128
 129
 130 def describe_symbol_shndx(x):
 131     return _DESCR_ST_SHNDX.get(x, '%3s' % x)
 132
 133
 134 def describe_reloc_type(x, elffile):
 135     arch = elffile.get_machine_arch()
 136     if arch == 'x86':
 137         return _DESCR_RELOC_TYPE_i386.get(x, _unknown)
 138     elif arch == 'x64':
 139         return _DESCR_RELOC_TYPE_x64.get(x, _unknown)
 140     elif arch == 'ARM':
 141         return _DESCR_RELOC_TYPE_ARM.get(x, _unknown)
 142     elif arch == 'AArch64':
 143         return _DESCR_RELOC_TYPE_AARCH64.get(x, _unknown)
 144     elif arch == '64-bit PowerPC':
 145         return _DESCR_RELOC_TYPE_PPC64.get(x, _unknown)
 146     elif arch == 'MIPS':
 147         return _DESCR_RELOC_TYPE_MIPS.get(x, _unknown)
 148     else:
 149         return 'unrecognized: %-7x' % (x & 0xFFFFFFFF)
 150
 151
 152 def describe_dyn_tag(x):
 153     return _DESCR_D_TAG.get(x, _unknown)
 154
 155
 156 def describe_dt_flags(x):
 157     return ' '.join(key[3:] for key, val in
 158         sorted(ENUM_DT_FLAGS.items(), key=lambda t: t[1]) if x & val)
 159
 160
 161 def describe_dt_flags_1(x):
 162     return ' '.join(key[5:] for key, val in
 163         sorted(ENUM_DT_FLAGS_1.items(), key=lambda t: t[1]) if x & val)
 164
 165
 166 def describe_syminfo_flags(x):
 167     return ''.join(_DESCR_SYMINFO_FLAGS[flag] for flag in (
 168         SUNW_SYMINFO_FLAGS.SYMINFO_FLG_CAP,
 169         SUNW_SYMINFO_FLAGS.SYMINFO_FLG_DIRECT,
 170         SUNW_SYMINFO_FLAGS.SYMINFO_FLG_FILTER,
 171         SUNW_SYMINFO_FLAGS.SYMINFO_FLG_AUXILIARY,
 172         SUNW_SYMINFO_FLAGS.SYMINFO_FLG_DIRECTBIND,
 173         SUNW_SYMINFO_FLAGS.SYMINFO_FLG_COPY,
 174         SUNW_SYMINFO_FLAGS.SYMINFO_FLG_LAZYLOAD,
 175         SUNW_SYMINFO_FLAGS.SYMINFO_FLG_NOEXTDIRECT,
 176         SUNW_SYMINFO_FLAGS.SYMINFO_FLG_INTERPOSE,
 177         SUNW_SYMINFO_FLAGS.SYMINFO_FLG_DEFERRED) if x & flag)
 178
 179
 180 def describe_symbol_boundto(x):
 181     return _DESCR_SYMINFO_BOUNDTO.get(x, '%3s' % x)
 182
 183
 184 def describe_ver_flags(x):
 185     return ' | '.join(_DESCR_VER_FLAGS[flag] for flag in (
 186         VER_FLAGS.VER_FLG_WEAK,
 187         VER_FLAGS.VER_FLG_BASE,
 188         VER_FLAGS.VER_FLG_INFO) if x & flag)
 189
 190
 191 def describe_note(x):
 192     n_desc = x['n_desc']
 193     desc = ''
 194     if x['n_type'] == 'NT_GNU_ABI_TAG':
 195         if x['n_name'] == 'Android':
 196             desc = '\n   description data: %s ' % ' '.join("%02x" % ord(b) for b in x['n_descdata'])
 197         else:
 198             desc = '\n    OS: %s, ABI: %d.%d.%d' % (
 199                 _DESCR_NOTE_ABI_TAG_OS.get(n_desc['abi_os'], _unknown),
 200                 n_desc['abi_major'], n_desc['abi_minor'], n_desc['abi_tiny'])
 201     elif x['n_type'] == 'NT_GNU_BUILD_ID':
 202         desc = '\n    Build ID: %s' % (n_desc)
 203     elif x['n_type'] == 'NT_GNU_GOLD_VERSION':
 204         desc = '\n    Version: %s' % (n_desc)
 205     else:
 206         desc = '\n    description data: {}'.format(' '.join(
 207             '{:02x}'.format(ord(byte)) for byte in n_desc
 208         ))
 209
 210     if x['n_type'] == 'NT_GNU_ABI_TAG' and x['n_name'] == 'Android':
 211         note_type = 'NT_VERSION'
 212         note_type_desc = 'version'
 213     else:
 214         note_type = (x['n_type'] if isinstance(x['n_type'], str)
 215                     else 'Unknown note type:')
 216         note_type_desc = ('0x%.8x' % x['n_type']
 217                         if isinstance(x['n_type'], int) else
 218                         _DESCR_NOTE_N_TYPE.get(x['n_type'], _unknown))
 219     return '%s (%s)%s' % (note_type, note_type_desc, desc)
 220
 221
 222 def describe_attr_tag_arm(tag, val, extra):
 223     idx = ENUM_ATTR_TAG_ARM[tag] - 1
 224     d_entry = _DESCR_ATTR_VAL_ARM[idx]
 225
 226     if d_entry is None:
 227         if tag == 'TAG_COMPATIBILITY':
 228             return (_DESCR_ATTR_TAG_ARM[tag]
 229                     + 'flag = %d, vendor = %s' % (val, extra))
 230
 231         elif tag == 'TAG_ALSO_COMPATIBLE_WITH':
 232             if val.tag == 'TAG_CPU_ARCH':
 233                 return _DESCR_ATTR_TAG_ARM[tag] + d_entry[val]
 234
 235             else:
 236                 return _DESCR_ATTR_TAG_ARM[tag] + '??? (%d)' % val.tag
 237
 238         elif tag == 'TAG_NODEFAULTS':
 239             return _DESCR_ATTR_TAG_ARM[tag] + 'True'
 240
 241         s = _DESCR_ATTR_TAG_ARM[tag]
 242         s += '"%s"' % val if val else ''
 243         return s
 244
 245     else:
 246         return _DESCR_ATTR_TAG_ARM[tag] + d_entry[val]
 247
 248
 249 #-------------------------------------------------------------------------------
 250 _unknown = '<unknown>'
 251
 252
 253 _DESCR_EI_CLASS = dict(
 254     ELFCLASSNONE='none',
 255     ELFCLASS32='ELF32',
 256     ELFCLASS64='ELF64',
 257 )
 258
 259
 260 _DESCR_EI_DATA = dict(
 261     ELFDATANONE='none',
 262     ELFDATA2LSB="2's complement, little endian",
 263     ELFDATA2MSB="2's complement, big endian",
 264 )
 265
 266
 267 _DESCR_EI_OSABI = dict(
 268     ELFOSABI_SYSV='UNIX - System V',
 269     ELFOSABI_HPUX='UNIX - HP-UX',
 270     ELFOSABI_NETBSD='UNIX - NetBSD',
 271     ELFOSABI_LINUX='UNIX - Linux',
 272     ELFOSABI_HURD='UNIX - GNU/Hurd',
 273     ELFOSABI_SOLARIS='UNIX - Solaris',
 274     ELFOSABI_AIX='UNIX - AIX',
 275     ELFOSABI_IRIX='UNIX - IRIX',
 276     ELFOSABI_FREEBSD='UNIX - FreeBSD',
 277     ELFOSABI_TRU64='UNIX - TRU64',
 278     ELFOSABI_MODESTO='Novell - Modesto',
 279     ELFOSABI_OPENBSD='UNIX - OpenBSD',
 280     ELFOSABI_OPENVMS='VMS - OpenVMS',
 281     ELFOSABI_NSK='HP - Non-Stop Kernel',
 282     ELFOSABI_AROS='AROS',
 283     ELFOSABI_FENIXOS='Fenix OS',
 284     ELFOSABI_CLOUD='Nuxi - CloudABI',
 285     ELFOSABI_SORTIX='Sortix',
 286     ELFOSABI_ARM_AEABI='ARM - EABI',
 287     ELFOSABI_ARM='ARM - ABI',
 288     ELFOSABI_STANDALONE='Standalone App',
 289 )
 290
 291
 292 _DESCR_E_TYPE = dict(
 293     ET_NONE='NONE (None)',
 294     ET_REL='REL (Relocatable file)',
 295     ET_EXEC='EXEC (Executable file)',
 296     ET_DYN='DYN (Shared object file)',
 297     ET_CORE='CORE (Core file)',
 298     PROC_SPECIFIC='Processor Specific',
 299 )
 300
 301
 302 _DESCR_E_MACHINE = dict(
 303     EM_NONE='None',
 304     EM_M32='WE32100',
 305     EM_SPARC='Sparc',
 306     EM_386='Intel 80386',
 307     EM_68K='MC68000',
 308     EM_88K='MC88000',
 309     EM_860='Intel 80860',
 310     EM_MIPS='MIPS R3000',
 311     EM_S370='IBM System/370',
 312     EM_MIPS_RS4_BE='MIPS 4000 big-endian',
 313     EM_IA_64='Intel IA-64',
 314     EM_X86_64='Advanced Micro Devices X86-64',
 315     EM_AVR='Atmel AVR 8-bit microcontroller',
 316     EM_ARM='ARM',
 317     EM_AARCH64='AArch64',
 318     EM_BLACKFIN='Analog Devices Blackfin',
 319     EM_PPC='PowerPC',
 320     EM_PPC64='PowerPC64',
 321     RESERVED='RESERVED',
 322 )
 323
 324
 325 _DESCR_P_TYPE = dict(
 326     PT_NULL='NULL',
 327     PT_LOAD='LOAD',
 328     PT_DYNAMIC='DYNAMIC',
 329     PT_INTERP='INTERP',
 330     PT_NOTE='NOTE',
 331     PT_SHLIB='SHLIB',
 332     PT_PHDR='PHDR',
 333     PT_GNU_EH_FRAME='GNU_EH_FRAME',
 334     PT_GNU_STACK='GNU_STACK',
 335     PT_GNU_RELRO='GNU_RELRO',
 336     PT_ARM_ARCHEXT='ARM_ARCHEXT',
 337     PT_ARM_EXIDX='EXIDX',  # binutils calls this EXIDX, not ARM_EXIDX
 338     PT_AARCH64_ARCHEXT='AARCH64_ARCHEXT',
 339     PT_AARCH64_UNWIND='AARCH64_UNWIND',
 340     PT_TLS='TLS',
 341     PT_MIPS_ABIFLAGS='ABIFLAGS'
 342 )
 343
 344
 345 _DESCR_P_FLAGS = {
 346     P_FLAGS.PF_X: 'E',
 347     P_FLAGS.PF_R: 'R',
 348     P_FLAGS.PF_W: 'W',
 349 }
 350
 351
 352 _DESCR_SH_TYPE = dict(
 353     SHT_NULL='NULL',
 354     SHT_PROGBITS='PROGBITS',
 355     SHT_SYMTAB='SYMTAB',
 356     SHT_STRTAB='STRTAB',
 357     SHT_RELA='RELA',
 358     SHT_HASH='HASH',
 359     SHT_DYNAMIC='DYNAMIC',
 360     SHT_NOTE='NOTE',
 361     SHT_NOBITS='NOBITS',
 362     SHT_REL='REL',
 363     SHT_SHLIB='SHLIB',
 364     SHT_DYNSYM='DYNSYM',
 365     SHT_INIT_ARRAY='INIT_ARRAY',
 366     SHT_FINI_ARRAY='FINI_ARRAY',
 367     SHT_PREINIT_ARRAY='PREINIT_ARRAY',
 368     SHT_GNU_ATTRIBUTES='GNU_ATTRIBUTES',
 369     SHT_GNU_HASH='GNU_HASH',
 370     SHT_GROUP='GROUP',
 371     SHT_SYMTAB_SHNDX='SYMTAB SECTION INDICIES',
 372     SHT_GNU_verdef='VERDEF',
 373     SHT_GNU_verneed='VERNEED',
 374     SHT_GNU_versym='VERSYM',
 375     SHT_GNU_LIBLIST='GNU_LIBLIST',
 376     SHT_ARM_EXIDX='ARM_EXIDX',
 377     SHT_ARM_PREEMPTMAP='ARM_PREEMPTMAP',
 378     SHT_ARM_ATTRIBUTES='ARM_ATTRIBUTES',
 379     SHT_ARM_DEBUGOVERLAY='ARM_DEBUGOVERLAY',
 380     SHT_MIPS_LIBLIST='MIPS_LIBLIST',
 381     SHT_MIPS_DEBUG='MIPS_DEBUG',
 382     SHT_MIPS_REGINFO='MIPS_REGINFO',
 383     SHT_MIPS_PACKAGE='MIPS_PACKAGE',
 384     SHT_MIPS_PACKSYM='MIPS_PACKSYM',
 385     SHT_MIPS_RELD='MIPS_RELD',
 386     SHT_MIPS_IFACE='MIPS_IFACE',
 387     SHT_MIPS_CONTENT='MIPS_CONTENT',
 388     SHT_MIPS_OPTIONS='MIPS_OPTIONS',
 389     SHT_MIPS_SHDR='MIPS_SHDR',
 390     SHT_MIPS_FDESC='MIPS_FDESC',
 391     SHT_MIPS_EXTSYM='MIPS_EXTSYM',
 392     SHT_MIPS_DENSE='MIPS_DENSE',
 393     SHT_MIPS_PDESC='MIPS_PDESC',
 394     SHT_MIPS_LOCSYM='MIPS_LOCSYM',
 395     SHT_MIPS_AUXSYM='MIPS_AUXSYM',
 396     SHT_MIPS_OPTSYM='MIPS_OPTSYM',
 397     SHT_MIPS_LOCSTR='MIPS_LOCSTR',
 398     SHT_MIPS_LINE='MIPS_LINE',
 399     SHT_MIPS_RFDESC='MIPS_RFDESC',
 400     SHT_MIPS_DELTASYM='MIPS_DELTASYM',
 401     SHT_MIPS_DELTAINST='MIPS_DELTAINST',
 402     SHT_MIPS_DELTACLASS='MIPS_DELTACLASS',
 403     SHT_MIPS_DWARF='MIPS_DWARF',
 404     SHT_MIPS_DELTADECL='MIPS_DELTADECL',
 405     SHT_MIPS_SYMBOL_LIB='MIPS_SYMBOL_LIB',
 406     SHT_MIPS_EVENTS='MIPS_EVENTS',
 407     SHT_MIPS_TRANSLATE='MIPS_TRANSLATE',
 408     SHT_MIPS_PIXIE='MIPS_PIXIE',
 409     SHT_MIPS_XLATE='MIPS_XLATE',
 410     SHT_MIPS_XLATE_DEBUG='MIPS_XLATE_DEBUG',
 411     SHT_MIPS_WHIRL='MIPS_WHIRL',
 412     SHT_MIPS_EH_REGION='MIPS_EH_REGION',
 413     SHT_MIPS_XLATE_OLD='MIPS_XLATE_OLD',
 414     SHT_MIPS_PDR_EXCEPTION='MIPS_PDR_EXCEPTION',
 415     SHT_MIPS_ABIFLAGS='MIPS_ABIFLAGS',
 416 )
 417
 418
 419 _DESCR_SH_FLAGS = {
 420     SH_FLAGS.SHF_WRITE: 'W',
 421     SH_FLAGS.SHF_ALLOC: 'A',
 422     SH_FLAGS.SHF_EXECINSTR: 'X',
 423     SH_FLAGS.SHF_MERGE: 'M',
 424     SH_FLAGS.SHF_STRINGS: 'S',
 425     SH_FLAGS.SHF_INFO_LINK: 'I',
 426     SH_FLAGS.SHF_LINK_ORDER: 'L',
 427     SH_FLAGS.SHF_OS_NONCONFORMING: 'O',
 428     SH_FLAGS.SHF_GROUP: 'G',
 429     SH_FLAGS.SHF_TLS: 'T',
 430     SH_FLAGS.SHF_MASKOS: 'o',
 431     SH_FLAGS.SHF_EXCLUDE: 'E',
 432 }
 433
 434
 435 _DESCR_RH_FLAGS = {
 436     RH_FLAGS.RHF_NONE: 'NONE',
 437     RH_FLAGS.RHF_QUICKSTART: 'QUICKSTART',
 438     RH_FLAGS.RHF_NOTPOT: 'NOTPOT',
 439     RH_FLAGS.RHF_NO_LIBRARY_REPLACEMENT: 'NO_LIBRARY_REPLACEMENT',
 440     RH_FLAGS.RHF_NO_MOVE: 'NO_MOVE',
 441     RH_FLAGS.RHF_SGI_ONLY: 'SGI_ONLY',
 442     RH_FLAGS.RHF_GUARANTEE_INIT: 'GUARANTEE_INIT',
 443     RH_FLAGS.RHF_DELTA_C_PLUS_PLUS: 'DELTA_C_PLUS_PLUS',
 444     RH_FLAGS.RHF_GUARANTEE_START_INIT: 'GUARANTEE_START_INIT',
 445     RH_FLAGS.RHF_PIXIE: 'PIXIE',
 446     RH_FLAGS.RHF_DEFAULT_DELAY_LOAD: 'DEFAULT_DELAY_LOAD',
 447     RH_FLAGS.RHF_REQUICKSTART: 'REQUICKSTART',
 448     RH_FLAGS.RHF_REQUICKSTARTED: 'REQUICKSTARTED',
 449     RH_FLAGS.RHF_CORD: 'CORD',
 450     RH_FLAGS.RHF_NO_UNRES_UNDEF: 'NO_UNRES_UNDEF',
 451     RH_FLAGS.RHF_RLD_ORDER_SAFE: 'RLD_ORDER_SAFE',
 452 }
 453
 454
 455 _DESCR_ST_INFO_TYPE = dict(
 456     STT_NOTYPE='NOTYPE',
 457     STT_OBJECT='OBJECT',
 458     STT_FUNC='FUNC',
 459     STT_SECTION='SECTION',
 460     STT_FILE='FILE',
 461     STT_COMMON='COMMON',
 462     STT_TLS='TLS',
 463     STT_NUM='NUM',
 464     STT_RELC='RELC',
 465     STT_SRELC='SRELC',
 466 )
 467
 468
 469 _DESCR_ST_INFO_BIND = dict(
 470     STB_LOCAL='LOCAL',
 471     STB_GLOBAL='GLOBAL',
 472     STB_WEAK='WEAK',
 473 )
 474
 475
 476 _DESCR_ST_VISIBILITY = dict(
 477     STV_DEFAULT='DEFAULT',
 478     STV_INTERNAL='INTERNAL',
 479     STV_HIDDEN='HIDDEN',
 480     STV_PROTECTED='PROTECTED',
 481     STV_EXPORTED='EXPORTED',
 482     STV_SINGLETON='SINGLETON',
 483     STV_ELIMINATE='ELIMINATE',
 484 )
 485
 486
 487 _DESCR_ST_SHNDX = dict(
 488     SHN_UNDEF='UND',
 489     SHN_ABS='ABS',
 490     SHN_COMMON='COM',
 491 )
 492
 493
 494 _DESCR_SYMINFO_FLAGS = {
 495     SUNW_SYMINFO_FLAGS.SYMINFO_FLG_DIRECT: 'D',
 496     SUNW_SYMINFO_FLAGS.SYMINFO_FLG_DIRECTBIND: 'B',
 497     SUNW_SYMINFO_FLAGS.SYMINFO_FLG_COPY: 'C',
 498     SUNW_SYMINFO_FLAGS.SYMINFO_FLG_LAZYLOAD: 'L',
 499     SUNW_SYMINFO_FLAGS.SYMINFO_FLG_NOEXTDIRECT: 'N',
 500     SUNW_SYMINFO_FLAGS.SYMINFO_FLG_AUXILIARY: 'A',
 501     SUNW_SYMINFO_FLAGS.SYMINFO_FLG_FILTER: 'F',
 502     SUNW_SYMINFO_FLAGS.SYMINFO_FLG_INTERPOSE: 'I',
 503     SUNW_SYMINFO_FLAGS.SYMINFO_FLG_CAP: 'S',
 504     SUNW_SYMINFO_FLAGS.SYMINFO_FLG_DEFERRED: 'P',
 505 }
 506
 507
 508 _DESCR_SYMINFO_BOUNDTO = dict(
 509     SYMINFO_BT_SELF='<self>',
 510     SYMINFO_BT_PARENT='<parent>',
 511     SYMINFO_BT_NONE='',
 512     SYMINFO_BT_EXTERN='<extern>',
 513 )
 514
 515
 516 _DESCR_VER_FLAGS = {
 517     0: '',
 518     VER_FLAGS.VER_FLG_BASE: 'BASE',
 519     VER_FLAGS.VER_FLG_WEAK: 'WEAK',
 520     VER_FLAGS.VER_FLG_INFO: 'INFO',
 521 }
 522
 523
 524 # PT_NOTE section types
 525 _DESCR_NOTE_N_TYPE = dict(
 526     NT_GNU_ABI_TAG='ABI version tag',
 527     NT_GNU_HWCAP='DSO-supplied software HWCAP info',
 528     NT_GNU_BUILD_ID='unique build ID bitstring',
 529     NT_GNU_GOLD_VERSION='gold version',
 530 )
 531
 532
 533 # Values in GNU .note.ABI-tag notes (n_type=='NT_GNU_ABI_TAG')
 534 _DESCR_NOTE_ABI_TAG_OS = dict(
 535     ELF_NOTE_OS_LINUX='Linux',
 536     ELF_NOTE_OS_GNU='GNU',
 537     ELF_NOTE_OS_SOLARIS2='Solaris 2',
 538     ELF_NOTE_OS_FREEBSD='FreeBSD',
 539     ELF_NOTE_OS_NETBSD='NetBSD',
 540     ELF_NOTE_OS_SYLLABLE='Syllable',
 541 )
 542
 543 def _reverse_dict(d, low_priority=()):
 544     """
 545     This is a tiny helper function to "reverse" the keys/values of a dictionary
 546     provided in the first argument, i.e. {k: v} becomes {v: k}.
 547
 548     The second argument (optional) provides primitive control over what to do in
 549     the case of conflicting values - if a value is present in this list, it will
 550     not override any other entries of the same value.
 551     """
 552     out = {}
 553     for k, v in iteritems(d):
 554         if v in out and k in low_priority:
 555             continue
 556         out[v] = k
 557     return out
 558
 559 _DESCR_RELOC_TYPE_i386 = _reverse_dict(ENUM_RELOC_TYPE_i386)
 560 _DESCR_RELOC_TYPE_x64 = _reverse_dict(ENUM_RELOC_TYPE_x64)
 561 _DESCR_RELOC_TYPE_ARM = _reverse_dict(ENUM_RELOC_TYPE_ARM)
 562 _DESCR_RELOC_TYPE_AARCH64 = _reverse_dict(ENUM_RELOC_TYPE_AARCH64)
 563 _DESCR_RELOC_TYPE_PPC64 = _reverse_dict(ENUM_RELOC_TYPE_PPC64)
 564 _DESCR_RELOC_TYPE_MIPS = _reverse_dict(ENUM_RELOC_TYPE_MIPS)
 565
 566 _low_priority_D_TAG = (
 567     # these are 'meta-tags' marking semantics of numeric ranges of the enum
 568     # they should not override other tags with the same numbers
 569     # see https://docs.oracle.com/cd/E23824_01/html/819-0690/chapter6-42444.html
 570     'DT_LOOS',
 571     'DT_HIOS',
 572     'DT_LOPROC',
 573     'DT_HIPROC',
 574     'DT_ENCODING',
 575 )
 576 _DESCR_D_TAG = _reverse_dict(ENUM_D_TAG, low_priority=_low_priority_D_TAG)
 577
 578 _DESCR_ATTR_TAG_ARM = dict(
 579     TAG_FILE='File Attributes',
 580     TAG_SECTION='Section Attributes:',
 581     TAG_SYMBOL='Symbol Attributes:',
 582     TAG_CPU_RAW_NAME='Tag_CPU_raw_name: ',
 583     TAG_CPU_NAME='Tag_CPU_name: ',
 584     TAG_CPU_ARCH='Tag_CPU_arch: ',
 585     TAG_CPU_ARCH_PROFILE='Tag_CPU_arch_profile: ',
 586     TAG_ARM_ISA_USE='Tag_ARM_ISA_use: ',
 587     TAG_THUMB_ISA_USE='Tag_Thumb_ISA_use: ',
 588     TAG_FP_ARCH='Tag_FP_arch: ',
 589     TAG_WMMX_ARCH='Tag_WMMX_arch: ',
 590     TAG_ADVANCED_SIMD_ARCH='Tag_Advanced_SIMD_arch: ',
 591     TAG_PCS_CONFIG='Tag_PCS_config: ',
 592     TAG_ABI_PCS_R9_USE='Tag_ABI_PCS_R9_use: ',
 593     TAG_ABI_PCS_RW_DATA='Tag_ABI_PCS_RW_use: ',
 594     TAG_ABI_PCS_RO_DATA='Tag_ABI_PCS_RO_use: ',
 595     TAG_ABI_PCS_GOT_USE='Tag_ABI_PCS_GOT_use: ',
 596     TAG_ABI_PCS_WCHAR_T='Tag_ABI_PCS_wchar_t: ',
 597     TAG_ABI_FP_ROUNDING='Tag_ABI_FP_rounding: ',
 598     TAG_ABI_FP_DENORMAL='Tag_ABI_FP_denormal: ',
 599     TAG_ABI_FP_EXCEPTIONS='Tag_ABI_FP_exceptions: ',
 600     TAG_ABI_FP_USER_EXCEPTIONS='Tag_ABI_FP_user_exceptions: ',
 601     TAG_ABI_FP_NUMBER_MODEL='Tag_ABI_FP_number_model: ',
 602     TAG_ABI_ALIGN_NEEDED='Tag_ABI_align_needed: ',
 603     TAG_ABI_ALIGN_PRESERVED='Tag_ABI_align_preserved: ',
 604     TAG_ABI_ENUM_SIZE='Tag_ABI_enum_size: ',
 605     TAG_ABI_HARDFP_USE='Tag_ABI_HardFP_use: ',
 606     TAG_ABI_VFP_ARGS='Tag_ABI_VFP_args: ',
 607     TAG_ABI_WMMX_ARGS='Tag_ABI_WMMX_args: ',
 608     TAG_ABI_OPTIMIZATION_GOALS='Tag_ABI_optimization_goals: ',
 609     TAG_ABI_FP_OPTIMIZATION_GOALS='Tag_ABI_FP_optimization_goals: ',
 610     TAG_COMPATIBILITY='Tag_compatibility: ',
 611     TAG_CPU_UNALIGNED_ACCESS='Tag_CPU_unaligned_access: ',
 612     TAG_FP_HP_EXTENSION='Tag_FP_HP_extension: ',
 613     TAG_ABI_FP_16BIT_FORMAT='Tag_ABI_FP_16bit_format: ',
 614     TAG_MPEXTENSION_USE='Tag_MPextension_use: ',
 615     TAG_DIV_USE='Tag_DIV_use: ',
 616     TAG_NODEFAULTS='Tag_nodefaults: ',
 617     TAG_ALSO_COMPATIBLE_WITH='Tag_also_compatible_with: ',
 618     TAG_T2EE_USE='Tag_T2EE_use: ',
 619     TAG_CONFORMANCE='Tag_conformance: ',
 620     TAG_VIRTUALIZATION_USE='Tag_Virtualization_use: ',
 621     TAG_MPEXTENSION_USE_OLD='Tag_MPextension_use_old: ',
 622 )
 623
 624
 625 _DESCR_ATTR_VAL_ARM = [
 626     None, #1
 627     None, #2
 628     None, #3
 629     None, #4
 630     None, #5
 631     { #6 TAG_CPU_ARCH
 632         0 : 'Pre-v4',
 633         1 : 'v4',
 634         2 : 'v4T',
 635         3 : 'v5T',
 636         4 : 'v5TE',
 637         5 : 'v5TEJ',
 638         6 : 'v6',
 639         7 : 'v6KZ',
 640         8 : 'v6T2',
 641         9 : 'v6K',
 642         10: 'v7',
 643         11: 'v6-M',
 644         12: 'v6S-M',
 645         13: 'v7E-M',
 646         14: 'v8',
 647         15: 'v8-R',
 648         16: 'v8-M.baseline',
 649         17: 'v8-M.mainline',
 650     },
 651     { #7 TAG_CPU_ARCH_PROFILE
 652         0x00: 'None',
 653         0x41: 'Application',
 654         0x52: 'Realtime',
 655         0x4D: 'Microcontroller',
 656         0x53: 'Application or Realtime',
 657     },
 658     { #8 TAG_ARM_ISA
 659         0: 'No',
 660         1: 'Yes',
 661     },
 662     { #9 TAG_THUMB_ISA
 663         0: 'No',
 664         1: 'Thumb-1',
 665         2: 'Thumb-2',
 666         3: 'Yes',
 667     },
 668     { #10 TAG_FP_ARCH
 669         0: 'No',
 670         1: 'VFPv1',
 671         2: 'VFPv2 ',
 672         3: 'VFPv3',
 673         4: 'VFPv3-D16',
 674         5: 'VFPv4',
 675         6: 'VFPv4-D16',
 676         7: 'FP ARM v8',
 677         8: 'FPv5/FP-D16 for ARMv8',
 678     },
 679     { #11 TAG_WMMX_ARCH
 680         0: 'No',
 681         1: 'WMMXv1',
 682         2: 'WMMXv2',
 683     },
 684     { #12 TAG_ADVANCED_SIMD_ARCH
 685         0: 'No',
 686         1: 'NEONv1',
 687         2: 'NEONv1 with Fused-MAC',
 688         3: 'NEON for ARMv8',
 689         4: 'NEON for ARMv8.1',
 690     },
 691     { #13 TAG_PCS_CONFIG
 692         0: 'None',
 693         1: 'Bare platform',
 694         2: 'Linux application',
 695         3: 'Linux DSO',
 696         4: 'PalmOS 2004',
 697         5: 'PalmOS (reserved)',
 698         6: 'SymbianOS 2004',
 699         7: 'SymbianOS (reserved)',
 700     },
 701     { #14 TAG_ABI_PCS_R9_USE
 702         0: 'v6',
 703         1: 'SB',
 704         2: 'TLS',
 705         3: 'Unused',
 706     },
 707     { #15 TAG_ABI_PCS_RW_DATA
 708         0: 'Absolute',
 709         1: 'PC-relative',
 710         2: 'SB-relative',
 711         3: 'None',
 712     },
 713     { #16 TAG_ABI_PCS_RO_DATA
 714         0: 'Absolute',
 715         1: 'PC-relative',
 716         2: 'None',
 717     },
 718     { #17 TAG_ABI_PCS_GOT_USE
 719         0: 'None',
 720         1: 'direct',
 721         2: 'GOT-indirect',
 722     },
 723     { #18 TAG_ABI_PCS_WCHAR_T
 724         0: 'None',
 725         1: '??? 1',
 726         2: '2',
 727         3: '??? 3',
 728         4: '4',
 729     },
 730     { #19 TAG_ABI_FP_ROUNDING
 731         0: 'Unused',
 732         1: 'Needed',
 733     },
 734     { #20 TAG_ABI_FP_DENORMAL
 735         0: 'Unused',
 736         1: 'Needed',
 737         2: 'Sign only',
 738     },
 739     { #21 TAG_ABI_FP_EXCEPTIONS
 740         0: 'Unused',
 741         1: 'Needed',
 742     },
 743     { #22 TAG_ABI_FP_USER_EXCEPTIONS
 744         0: 'Unused',
 745         1: 'Needed',
 746     },
 747     { #23 TAG_ABI_FP_NUMBER_MODEL
 748         0: 'Unused',
 749         1: 'Finite',
 750         2: 'RTABI',
 751         3: 'IEEE 754',
 752     },
 753     { #24 TAG_ABI_ALIGN_NEEDED
 754         0: 'None',
 755         1: '8-byte',
 756         2: '4-byte',
 757         3: '??? 3',
 758     },
 759     { #25 TAG_ABI_ALIGN_PRESERVED
 760         0: 'None',
 761         1: '8-byte, except leaf SP',
 762         2: '8-byte',
 763         3: '??? 3',
 764     },
 765     { #26 TAG_ABI_ENUM_SIZE
 766         0: 'Unused',
 767         1: 'small',
 768         2: 'int',
 769         3: 'forced to int',
 770     },
 771     { #27 TAG_ABI_HARDFP_USE
 772         0: 'As Tag_FP_arch',
 773         1: 'SP only',
 774         2: 'Reserved',
 775         3: 'Deprecated',
 776     },
 777     { #28 TAG_ABI_VFP_ARGS
 778         0: 'AAPCS',
 779         1: 'VFP registers',
 780         2: 'custom',
 781         3: 'compatible',
 782     },
 783     { #29 TAG_ABI_WMMX_ARGS
 784         0: 'AAPCS',
 785         1: 'WMMX registers',
 786         2: 'custom',
 787     },
 788     { #30 TAG_ABI_OPTIMIZATION_GOALS
 789         0: 'None',
 790         1: 'Prefer Speed',
 791         2: 'Aggressive Speed',
 792         3: 'Prefer Size',
 793         4: 'Aggressive Size',
 794         5: 'Prefer Debug',
 795         6: 'Aggressive Debug',
 796     },
 797     { #31 TAG_ABI_FP_OPTIMIZATION_GOALS
 798         0: 'None',
 799         1: 'Prefer Speed',
 800         2: 'Aggressive Speed',
 801         3: 'Prefer Size',
 802         4: 'Aggressive Size',
 803         5: 'Prefer Accuracy',
 804         6: 'Aggressive Accuracy',
 805     },
 806     { #32 TAG_COMPATIBILITY
 807         0: 'No',
 808         1: 'Yes',
 809     },
 810     None, #33
 811     { #34 TAG_CPU_UNALIGNED_ACCESS
 812         0: 'None',
 813         1: 'v6',
 814     },
 815     None, #35
 816     { #36 TAG_FP_HP_EXTENSION
 817         0: 'Not Allowed',
 818         1: 'Allowed',
 819     },
 820     None, #37
 821     { #38 TAG_ABI_FP_16BIT_FORMAT
 822         0: 'None',
 823         1: 'IEEE 754',
 824         2: 'Alternative Format',
 825     },
 826     None, #39
 827     None, #40
 828     None, #41
 829     { #42 TAG_MPEXTENSION_USE
 830         0: 'Not Allowed',
 831         1: 'Allowed',
 832     },
 833     None, #43
 834     { #44 TAG_DIV_USE
 835         0: 'Allowed in Thumb-ISA, v7-R or v7-M',
 836         1: 'Not allowed',
 837         2: 'Allowed in v7-A with integer division extension',
 838     },
 839     None, #45
 840     None, #46
 841     None, #47
 842     None, #48
 843     None, #49
 844     None, #50
 845     None, #51
 846     None, #52
 847     None, #53
 848     None, #54
 849     None, #55
 850     None, #56
 851     None, #57
 852     None, #58
 853     None, #59
 854     None, #60
 855     None, #61
 856     None, #62
 857     None, #63
 858     None, #64
 859     None, #65
 860     { #66 TAG_FP_HP_EXTENSION
 861         0: 'Not Allowed',
 862         1: 'Allowed',
 863     },
 864     None, #67
 865     { #68 TAG_VIRTUALIZATION_USE
 866         0: 'Not Allowed',
 867         1: 'TrustZone',
 868         2: 'Virtualization Extensions',
 869         3: 'TrustZone and Virtualization Extensions',
 870     },
 871     None, #69
 872     { #70 TAG_MPEXTENSION_USE_OLD
 873         0: 'Not Allowed',
 874         1: 'Allowed',
 875     },
 876 ]