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_ATTR_TAG_RISCV,
  14     ENUM_DT_FLAGS, ENUM_DT_FLAGS_1)
  15 from .constants import (
  16     P_FLAGS, RH_FLAGS, SH_FLAGS, SUNW_SYMINFO_FLAGS, VER_FLAGS)
  17 from ..common.utils import bytes2hex
  18
  19
  20 def describe_ei_class(x):
  21     return _DESCR_EI_CLASS.get(x, _unknown)
  22
  23
  24 def describe_ei_data(x):
  25     return _DESCR_EI_DATA.get(x, _unknown)
  26
  27
  28 def describe_ei_version(x):
  29     s = '%d' % ENUM_E_VERSION[x]
  30     if x == 'EV_CURRENT':
  31         s += ' (current)'
  32     return s
  33
  34
  35 def describe_ei_osabi(x):
  36     return _DESCR_EI_OSABI.get(x, _unknown)
  37
  38
  39 def describe_e_type(x, elffile=None):
  40     if elffile is not None and x == 'ET_DYN':
  41         # Detect whether this is a normal SO or a PIE executable
  42         dynamic = elffile.get_section_by_name('.dynamic')
  43         for t in dynamic.iter_tags('DT_FLAGS_1'):
  44             if t.entry.d_val & ENUM_DT_FLAGS_1['DF_1_PIE']:
  45                 return 'DYN (Position-Independent Executable file)'
  46     return _DESCR_E_TYPE.get(x, _unknown)
  47
  48
  49 def describe_e_machine(x):
  50     return _DESCR_E_MACHINE.get(x, _unknown)
  51
  52
  53 def describe_e_version_numeric(x):
  54     return '0x%x' % ENUM_E_VERSION[x]
  55
  56
  57 def describe_p_type(x):
  58     if x in _DESCR_P_TYPE:
  59         return _DESCR_P_TYPE.get(x)
  60     elif x >= ENUM_P_TYPE_BASE['PT_LOOS'] and x <= ENUM_P_TYPE_BASE['PT_HIOS']:
  61         return 'LOOS+%lx' % (x - ENUM_P_TYPE_BASE['PT_LOOS'])
  62     else:
  63         return _unknown
  64
  65
  66 def describe_p_flags(x):
  67     s = ''
  68     for flag in (P_FLAGS.PF_R, P_FLAGS.PF_W, P_FLAGS.PF_X):
  69         s += _DESCR_P_FLAGS[flag] if (x & flag) else ' '
  70     return s
  71
  72
  73 def describe_rh_flags(x):
  74     return ' '.join(
  75         _DESCR_RH_FLAGS[flag]
  76         for flag in (RH_FLAGS.RHF_NONE, RH_FLAGS.RHF_QUICKSTART,
  77                      RH_FLAGS.RHF_NOTPOT, RH_FLAGS.RHF_NO_LIBRARY_REPLACEMENT,
  78                      RH_FLAGS.RHF_NO_MOVE, RH_FLAGS.RHF_SGI_ONLY,
  79                      RH_FLAGS.RHF_GUARANTEE_INIT,
  80                      RH_FLAGS.RHF_DELTA_C_PLUS_PLUS,
  81                      RH_FLAGS.RHF_GUARANTEE_START_INIT, RH_FLAGS.RHF_PIXIE,
  82                      RH_FLAGS.RHF_DEFAULT_DELAY_LOAD,
  83                      RH_FLAGS.RHF_REQUICKSTART, RH_FLAGS.RHF_REQUICKSTARTED,
  84                      RH_FLAGS.RHF_CORD, RH_FLAGS.RHF_NO_UNRES_UNDEF,
  85                      RH_FLAGS.RHF_RLD_ORDER_SAFE)
  86         if x & flag)
  87
  88
  89 def describe_sh_type(x):
  90     if x in _DESCR_SH_TYPE:
  91         return _DESCR_SH_TYPE.get(x)
  92     elif (x >= ENUM_SH_TYPE_BASE['SHT_LOOS'] and
  93           x < ENUM_SH_TYPE_BASE['SHT_GNU_versym']):
  94         return 'loos+0x%lx' % (x - ENUM_SH_TYPE_BASE['SHT_LOOS'])
  95     else:
  96         return _unknown
  97
  98
  99 def describe_sh_flags(x):
 100     s = ''
 101     for flag in (
 102             SH_FLAGS.SHF_WRITE, SH_FLAGS.SHF_ALLOC, SH_FLAGS.SHF_EXECINSTR,
 103             SH_FLAGS.SHF_MERGE, SH_FLAGS.SHF_STRINGS, SH_FLAGS.SHF_INFO_LINK,
 104             SH_FLAGS.SHF_LINK_ORDER, SH_FLAGS.SHF_OS_NONCONFORMING,
 105             SH_FLAGS.SHF_GROUP, SH_FLAGS.SHF_TLS, SH_FLAGS.SHF_MASKOS,
 106             SH_FLAGS.SHF_EXCLUDE):
 107         s += _DESCR_SH_FLAGS[flag] if (x & flag) else ''
 108     if not x & SH_FLAGS.SHF_EXCLUDE:
 109         if x & SH_FLAGS.SHF_MASKPROC:
 110             s += 'p'
 111     return s
 112
 113
 114 def describe_symbol_type(x):
 115     return _DESCR_ST_INFO_TYPE.get(x, _unknown)
 116
 117
 118 def describe_symbol_bind(x):
 119     return _DESCR_ST_INFO_BIND.get(x, _unknown)
 120
 121
 122 def describe_symbol_visibility(x):
 123     return _DESCR_ST_VISIBILITY.get(x, _unknown)
 124
 125
 126 def describe_symbol_local(x):
 127     return '[<localentry>: ' + str(1 << x) + ']'
 128
 129
 130 def describe_symbol_other(x):
 131     vis = describe_symbol_visibility(x['visibility'])
 132     if x['local'] > 1 and x['local'] < 7:
 133         return vis + ' ' + describe_symbol_local(x['local'])
 134     return vis
 135
 136
 137 def describe_symbol_shndx(x):
 138     return _DESCR_ST_SHNDX.get(x, '%3s' % x)
 139
 140
 141 def describe_reloc_type(x, elffile):
 142     arch = elffile.get_machine_arch()
 143     if arch == 'x86':
 144         return _DESCR_RELOC_TYPE_i386.get(x, _unknown)
 145     elif arch == 'x64':
 146         return _DESCR_RELOC_TYPE_x64.get(x, _unknown)
 147     elif arch == 'ARM':
 148         return _DESCR_RELOC_TYPE_ARM.get(x, _unknown)
 149     elif arch == 'AArch64':
 150         return _DESCR_RELOC_TYPE_AARCH64.get(x, _unknown)
 151     elif arch == '64-bit PowerPC':
 152         return _DESCR_RELOC_TYPE_PPC64.get(x, _unknown)
 153     elif arch == 'MIPS':
 154         return _DESCR_RELOC_TYPE_MIPS.get(x, _unknown)
 155     else:
 156         return 'unrecognized: %-7x' % (x & 0xFFFFFFFF)
 157
 158
 159 def describe_dyn_tag(x):
 160     return _DESCR_D_TAG.get(x, _unknown)
 161
 162
 163 def describe_dt_flags(x):
 164     return ' '.join(key[3:] for key, val in
 165         sorted(ENUM_DT_FLAGS.items(), key=lambda t: t[1]) if x & val)
 166
 167
 168 def describe_dt_flags_1(x):
 169     return ' '.join(key[5:] for key, val in
 170         sorted(ENUM_DT_FLAGS_1.items(), key=lambda t: t[1]) if x & val)
 171
 172
 173 def describe_syminfo_flags(x):
 174     return ''.join(_DESCR_SYMINFO_FLAGS[flag] for flag in (
 175         SUNW_SYMINFO_FLAGS.SYMINFO_FLG_CAP,
 176         SUNW_SYMINFO_FLAGS.SYMINFO_FLG_DIRECT,
 177         SUNW_SYMINFO_FLAGS.SYMINFO_FLG_FILTER,
 178         SUNW_SYMINFO_FLAGS.SYMINFO_FLG_AUXILIARY,
 179         SUNW_SYMINFO_FLAGS.SYMINFO_FLG_DIRECTBIND,
 180         SUNW_SYMINFO_FLAGS.SYMINFO_FLG_COPY,
 181         SUNW_SYMINFO_FLAGS.SYMINFO_FLG_LAZYLOAD,
 182         SUNW_SYMINFO_FLAGS.SYMINFO_FLG_NOEXTDIRECT,
 183         SUNW_SYMINFO_FLAGS.SYMINFO_FLG_INTERPOSE,
 184         SUNW_SYMINFO_FLAGS.SYMINFO_FLG_DEFERRED) if x & flag)
 185
 186
 187 def describe_symbol_boundto(x):
 188     return _DESCR_SYMINFO_BOUNDTO.get(x, '%3s' % x)
 189
 190
 191 def describe_ver_flags(x):
 192     return ' | '.join(_DESCR_VER_FLAGS[flag] for flag in (
 193         VER_FLAGS.VER_FLG_WEAK,
 194         VER_FLAGS.VER_FLG_BASE,
 195         VER_FLAGS.VER_FLG_INFO) if x & flag)
 196
 197
 198 def describe_note(x):
 199     n_desc = x['n_desc']
 200     desc = ''
 201     if x['n_type'] == 'NT_GNU_ABI_TAG':
 202         if x['n_name'] == 'Android':
 203             desc = '\n   description data: %s ' % bytes2hex(x['n_descdata'])
 204         else:
 205             desc = '\n    OS: %s, ABI: %d.%d.%d' % (
 206                 _DESCR_NOTE_ABI_TAG_OS.get(n_desc['abi_os'], _unknown),
 207                 n_desc['abi_major'], n_desc['abi_minor'], n_desc['abi_tiny'])
 208     elif x['n_type'] == 'NT_GNU_BUILD_ID':
 209         desc = '\n    Build ID: %s' % (n_desc)
 210     elif x['n_type'] == 'NT_GNU_GOLD_VERSION':
 211         desc = '\n    Version: %s' % (n_desc)
 212     elif x['n_type'] == 'NT_GNU_PROPERTY_TYPE_0':
 213         desc = '\n      Properties: ' + describe_note_gnu_properties(x['n_desc'])
 214     else:
 215         desc = '\n      description data: {}'.format(bytes2hex(n_desc))
 216
 217     if x['n_type'] == 'NT_GNU_ABI_TAG' and x['n_name'] == 'Android':
 218         note_type = 'NT_VERSION'
 219         note_type_desc = 'version'
 220     else:
 221         note_type = (x['n_type'] if isinstance(x['n_type'], str)
 222                     else 'Unknown note type:')
 223         note_type_desc = ('0x%.8x' % x['n_type']
 224                         if isinstance(x['n_type'], int) else
 225                         _DESCR_NOTE_N_TYPE.get(x['n_type'], _unknown))
 226     return '%s (%s)%s' % (note_type, note_type_desc, desc)
 227
 228
 229 def describe_attr_tag_arm(tag, val, extra):
 230     idx = ENUM_ATTR_TAG_ARM[tag] - 1
 231     d_entry = _DESCR_ATTR_VAL_ARM[idx]
 232
 233     if d_entry is None:
 234         if tag == 'TAG_COMPATIBILITY':
 235             return (_DESCR_ATTR_TAG_ARM[tag]
 236                     + 'flag = %d, vendor = %s' % (val, extra))
 237
 238         elif tag == 'TAG_ALSO_COMPATIBLE_WITH':
 239             if val.tag == 'TAG_CPU_ARCH':
 240                 return _DESCR_ATTR_TAG_ARM[tag] + d_entry[val]
 241
 242             else:
 243                 return _DESCR_ATTR_TAG_ARM[tag] + '??? (%d)' % val.tag
 244
 245         elif tag == 'TAG_NODEFAULTS':
 246             return _DESCR_ATTR_TAG_ARM[tag] + 'True'
 247
 248         s = _DESCR_ATTR_TAG_ARM[tag]
 249         s += '"%s"' % val if val else ''
 250         return s
 251
 252     else:
 253         return _DESCR_ATTR_TAG_ARM[tag] + d_entry[val]
 254
 255 def describe_attr_tag_riscv(tag, val, extra):
 256     idx = ENUM_ATTR_TAG_RISCV[tag] - 1
 257     d_entry = _DESCR_ATTR_VAL_RISCV[idx]
 258
 259     if d_entry is None:
 260         s = _DESCR_ATTR_TAG_RISCV[tag]
 261         s += '"%s"' % val if val else ''
 262         return s
 263
 264     else:
 265         return _DESCR_ATTR_TAG_RISCV[tag] + d_entry[val]
 266
 267
 268
 269 def describe_note_gnu_property_x86_feature_1(value):
 270     descs = []
 271     for mask, desc in _DESCR_NOTE_GNU_PROPERTY_X86_FEATURE_1_FLAGS:
 272         if value & mask:
 273             descs.append(desc)
 274     return 'x86 feature: ' + ', '.join(descs)
 275
 276 def describe_note_gnu_property_x86_feature_2_used(value):
 277     descs = []
 278     for mask, desc in _DESCR_NOTE_GNU_PROPERTY_X86_FEATURE_2_FLAGS:
 279         if value & mask:
 280             descs.append(desc)
 281     return 'x86 feature used: ' + ', '.join(descs)
 282
 283 def describe_note_gnu_property_x86_isa_1(value, verb):
 284     descs = []
 285     for mask, desc in _DESCR_NOTE_GNU_PROPERTY_X86_ISA_1_FLAGS:
 286         if value & mask:
 287             descs.append(desc)
 288     return 'x86 ISA %s: %s' % (verb, ', '.join(descs))
 289
 290 def describe_note_gnu_properties(properties):
 291     descriptions = []
 292     for prop in properties:
 293         t, d, sz = prop.pr_type, prop.pr_data, prop.pr_datasz
 294         if t == 'GNU_PROPERTY_STACK_SIZE':
 295             if type(d) is int:
 296                 prop_desc = 'stack size: 0x%x' % d
 297             else:
 298                 prop_desc = 'stack size: <corrupt length: 0x%x>' % sz
 299         elif t == 'GNU_PROPERTY_NO_COPY_ON_PROTECTED':
 300             if sz != 0:
 301                 prop_desc = ' <corrupt length: 0x%x>' % sz
 302             else:
 303                 prop_desc = 'no copy on protected'
 304         elif t == 'GNU_PROPERTY_X86_FEATURE_1_AND':
 305             if sz != 4:
 306                 prop_desc = ' <corrupt length: 0x%x>' % sz
 307             else:
 308                 prop_desc = describe_note_gnu_property_x86_feature_1(d)
 309         elif t == 'GNU_PROPERTY_X86_FEATURE_2_USED':
 310             if sz != 4:
 311                 prop_desc = ' <corrupt length: 0x%x>' % sz
 312             else:
 313                 prop_desc = describe_note_gnu_property_x86_feature_2_used(d)
 314         elif t == 'GNU_PROPERTY_X86_ISA_1_NEEDED':
 315             if sz != 4:
 316                 prop_desc = ' <corrupt length: 0x%x>' % sz
 317             else:
 318                 prop_desc = describe_note_gnu_property_x86_isa_1(d, "needed")
 319         elif t == 'GNU_PROPERTY_X86_ISA_1_USED':
 320             if sz != 4:
 321                 prop_desc = ' <corrupt length: 0x%x>' % sz
 322             else:
 323                 prop_desc = describe_note_gnu_property_x86_isa_1(d, "used")
 324         elif _DESCR_NOTE_GNU_PROPERTY_TYPE_LOPROC <= t <= _DESCR_NOTE_GNU_PROPERTY_TYPE_HIPROC:
 325             prop_desc = '<processor-specific type 0x%x data: %s >' % (t, bytes2hex(d, sep=' '))
 326         elif _DESCR_NOTE_GNU_PROPERTY_TYPE_LOUSER <= t <= _DESCR_NOTE_GNU_PROPERTY_TYPE_HIUSER:
 327             prop_desc = '<application-specific type 0x%x data: %s >' % (t, bytes2hex(d, sep=' '))
 328         else:
 329             prop_desc = '<unknown type 0x%x data: %s >' % (t, bytes2hex(d, sep=' '))
 330         descriptions.append(prop_desc)
 331     return '\n        '.join(descriptions)
 332
 333 #-------------------------------------------------------------------------------
 334 _unknown = '<unknown>'
 335
 336
 337 _DESCR_EI_CLASS = dict(
 338     ELFCLASSNONE='none',
 339     ELFCLASS32='ELF32',
 340     ELFCLASS64='ELF64',
 341 )
 342
 343
 344 _DESCR_EI_DATA = dict(
 345     ELFDATANONE='none',
 346     ELFDATA2LSB="2's complement, little endian",
 347     ELFDATA2MSB="2's complement, big endian",
 348 )
 349
 350
 351 _DESCR_EI_OSABI = dict(
 352     ELFOSABI_SYSV='UNIX - System V',
 353     ELFOSABI_HPUX='UNIX - HP-UX',
 354     ELFOSABI_NETBSD='UNIX - NetBSD',
 355     ELFOSABI_LINUX='UNIX - Linux',
 356     ELFOSABI_HURD='UNIX - GNU/Hurd',
 357     ELFOSABI_SOLARIS='UNIX - Solaris',
 358     ELFOSABI_AIX='UNIX - AIX',
 359     ELFOSABI_IRIX='UNIX - IRIX',
 360     ELFOSABI_FREEBSD='UNIX - FreeBSD',
 361     ELFOSABI_TRU64='UNIX - TRU64',
 362     ELFOSABI_MODESTO='Novell - Modesto',
 363     ELFOSABI_OPENBSD='UNIX - OpenBSD',
 364     ELFOSABI_OPENVMS='VMS - OpenVMS',
 365     ELFOSABI_NSK='HP - Non-Stop Kernel',
 366     ELFOSABI_AROS='AROS',
 367     ELFOSABI_FENIXOS='Fenix OS',
 368     ELFOSABI_CLOUD='Nuxi - CloudABI',
 369     ELFOSABI_SORTIX='Sortix',
 370     ELFOSABI_ARM_AEABI='ARM - EABI',
 371     ELFOSABI_ARM='ARM - ABI',
 372     ELFOSABI_CELL_LV2='CellOS Lv-2',
 373     ELFOSABI_STANDALONE='Standalone App',
 374 )
 375
 376
 377 _DESCR_E_TYPE = dict(
 378     ET_NONE='NONE (None)',
 379     ET_REL='REL (Relocatable file)',
 380     ET_EXEC='EXEC (Executable file)',
 381     ET_DYN='DYN (Shared object file)',
 382     ET_CORE='CORE (Core file)',
 383     PROC_SPECIFIC='Processor Specific',
 384 )
 385
 386
 387 _DESCR_E_MACHINE = dict(
 388     EM_NONE='None',
 389     EM_M32='WE32100',
 390     EM_SPARC='Sparc',
 391     EM_386='Intel 80386',
 392     EM_68K='MC68000',
 393     EM_88K='MC88000',
 394     EM_860='Intel 80860',
 395     EM_MIPS='MIPS R3000',
 396     EM_S370='IBM System/370',
 397     EM_MIPS_RS4_BE='MIPS 4000 big-endian',
 398     EM_IA_64='Intel IA-64',
 399     EM_X86_64='Advanced Micro Devices X86-64',
 400     EM_AVR='Atmel AVR 8-bit microcontroller',
 401     EM_ARM='ARM',
 402     EM_AARCH64='AArch64',
 403     EM_BLACKFIN='Analog Devices Blackfin',
 404     EM_PPC='PowerPC',
 405     EM_PPC64='PowerPC64',
 406     EM_RISCV='RISC-V',
 407     EM_LOONGARCH='LoongArch',
 408     RESERVED='RESERVED',
 409 )
 410
 411
 412 _DESCR_P_TYPE = dict(
 413     PT_NULL='NULL',
 414     PT_LOAD='LOAD',
 415     PT_DYNAMIC='DYNAMIC',
 416     PT_INTERP='INTERP',
 417     PT_NOTE='NOTE',
 418     PT_SHLIB='SHLIB',
 419     PT_PHDR='PHDR',
 420     PT_GNU_EH_FRAME='GNU_EH_FRAME',
 421     PT_GNU_STACK='GNU_STACK',
 422     PT_GNU_RELRO='GNU_RELRO',
 423     PT_GNU_PROPERTY='GNU_PROPERTY',
 424     PT_ARM_ARCHEXT='ARM_ARCHEXT',
 425     PT_ARM_EXIDX='EXIDX',  # binutils calls this EXIDX, not ARM_EXIDX
 426     PT_AARCH64_ARCHEXT='AARCH64_ARCHEXT',
 427     PT_AARCH64_UNWIND='AARCH64_UNWIND',
 428     PT_TLS='TLS',
 429     PT_MIPS_ABIFLAGS='ABIFLAGS',
 430     PT_RISCV_ATTRIBUTES='RISCV_ATTRIBUT',
 431 )
 432
 433
 434 _DESCR_P_FLAGS = {
 435     P_FLAGS.PF_X: 'E',
 436     P_FLAGS.PF_R: 'R',
 437     P_FLAGS.PF_W: 'W',
 438 }
 439
 440
 441 _DESCR_SH_TYPE = dict(
 442     SHT_NULL='NULL',
 443     SHT_PROGBITS='PROGBITS',
 444     SHT_SYMTAB='SYMTAB',
 445     SHT_STRTAB='STRTAB',
 446     SHT_RELA='RELA',
 447     SHT_HASH='HASH',
 448     SHT_DYNAMIC='DYNAMIC',
 449     SHT_NOTE='NOTE',
 450     SHT_NOBITS='NOBITS',
 451     SHT_REL='REL',
 452     SHT_SHLIB='SHLIB',
 453     SHT_DYNSYM='DYNSYM',
 454     SHT_INIT_ARRAY='INIT_ARRAY',
 455     SHT_FINI_ARRAY='FINI_ARRAY',
 456     SHT_PREINIT_ARRAY='PREINIT_ARRAY',
 457     SHT_GNU_ATTRIBUTES='GNU_ATTRIBUTES',
 458     SHT_GNU_HASH='GNU_HASH',
 459     SHT_GROUP='GROUP',
 460     SHT_SYMTAB_SHNDX='SYMTAB SECTION INDICIES',
 461     SHT_RELR='RELR',
 462     SHT_GNU_verdef='VERDEF',
 463     SHT_GNU_verneed='VERNEED',
 464     SHT_GNU_versym='VERSYM',
 465     SHT_GNU_LIBLIST='GNU_LIBLIST',
 466     SHT_ARM_EXIDX='ARM_EXIDX',
 467     SHT_ARM_PREEMPTMAP='ARM_PREEMPTMAP',
 468     SHT_ARM_ATTRIBUTES='ARM_ATTRIBUTES',
 469     SHT_ARM_DEBUGOVERLAY='ARM_DEBUGOVERLAY',
 470     SHT_RISCV_ATTRIBUTES='RISCV_ATTRIBUTES',
 471     SHT_MIPS_LIBLIST='MIPS_LIBLIST',
 472     SHT_MIPS_DEBUG='MIPS_DEBUG',
 473     SHT_MIPS_REGINFO='MIPS_REGINFO',
 474     SHT_MIPS_PACKAGE='MIPS_PACKAGE',
 475     SHT_MIPS_PACKSYM='MIPS_PACKSYM',
 476     SHT_MIPS_RELD='MIPS_RELD',
 477     SHT_MIPS_IFACE='MIPS_IFACE',
 478     SHT_MIPS_CONTENT='MIPS_CONTENT',
 479     SHT_MIPS_OPTIONS='MIPS_OPTIONS',
 480     SHT_MIPS_SHDR='MIPS_SHDR',
 481     SHT_MIPS_FDESC='MIPS_FDESC',
 482     SHT_MIPS_EXTSYM='MIPS_EXTSYM',
 483     SHT_MIPS_DENSE='MIPS_DENSE',
 484     SHT_MIPS_PDESC='MIPS_PDESC',
 485     SHT_MIPS_LOCSYM='MIPS_LOCSYM',
 486     SHT_MIPS_AUXSYM='MIPS_AUXSYM',
 487     SHT_MIPS_OPTSYM='MIPS_OPTSYM',
 488     SHT_MIPS_LOCSTR='MIPS_LOCSTR',
 489     SHT_MIPS_LINE='MIPS_LINE',
 490     SHT_MIPS_RFDESC='MIPS_RFDESC',
 491     SHT_MIPS_DELTASYM='MIPS_DELTASYM',
 492     SHT_MIPS_DELTAINST='MIPS_DELTAINST',
 493     SHT_MIPS_DELTACLASS='MIPS_DELTACLASS',
 494     SHT_MIPS_DWARF='MIPS_DWARF',
 495     SHT_MIPS_DELTADECL='MIPS_DELTADECL',
 496     SHT_MIPS_SYMBOL_LIB='MIPS_SYMBOL_LIB',
 497     SHT_MIPS_EVENTS='MIPS_EVENTS',
 498     SHT_MIPS_TRANSLATE='MIPS_TRANSLATE',
 499     SHT_MIPS_PIXIE='MIPS_PIXIE',
 500     SHT_MIPS_XLATE='MIPS_XLATE',
 501     SHT_MIPS_XLATE_DEBUG='MIPS_XLATE_DEBUG',
 502     SHT_MIPS_WHIRL='MIPS_WHIRL',
 503     SHT_MIPS_EH_REGION='MIPS_EH_REGION',
 504     SHT_MIPS_XLATE_OLD='MIPS_XLATE_OLD',
 505     SHT_MIPS_PDR_EXCEPTION='MIPS_PDR_EXCEPTION',
 506     SHT_MIPS_ABIFLAGS='MIPS_ABIFLAGS',
 507 )
 508
 509
 510 _DESCR_SH_FLAGS = {
 511     SH_FLAGS.SHF_WRITE: 'W',
 512     SH_FLAGS.SHF_ALLOC: 'A',
 513     SH_FLAGS.SHF_EXECINSTR: 'X',
 514     SH_FLAGS.SHF_MERGE: 'M',
 515     SH_FLAGS.SHF_STRINGS: 'S',
 516     SH_FLAGS.SHF_INFO_LINK: 'I',
 517     SH_FLAGS.SHF_LINK_ORDER: 'L',
 518     SH_FLAGS.SHF_OS_NONCONFORMING: 'O',
 519     SH_FLAGS.SHF_GROUP: 'G',
 520     SH_FLAGS.SHF_TLS: 'T',
 521     SH_FLAGS.SHF_MASKOS: 'o',
 522     SH_FLAGS.SHF_EXCLUDE: 'E',
 523 }
 524
 525
 526 _DESCR_RH_FLAGS = {
 527     RH_FLAGS.RHF_NONE: 'NONE',
 528     RH_FLAGS.RHF_QUICKSTART: 'QUICKSTART',
 529     RH_FLAGS.RHF_NOTPOT: 'NOTPOT',
 530     RH_FLAGS.RHF_NO_LIBRARY_REPLACEMENT: 'NO_LIBRARY_REPLACEMENT',
 531     RH_FLAGS.RHF_NO_MOVE: 'NO_MOVE',
 532     RH_FLAGS.RHF_SGI_ONLY: 'SGI_ONLY',
 533     RH_FLAGS.RHF_GUARANTEE_INIT: 'GUARANTEE_INIT',
 534     RH_FLAGS.RHF_DELTA_C_PLUS_PLUS: 'DELTA_C_PLUS_PLUS',
 535     RH_FLAGS.RHF_GUARANTEE_START_INIT: 'GUARANTEE_START_INIT',
 536     RH_FLAGS.RHF_PIXIE: 'PIXIE',
 537     RH_FLAGS.RHF_DEFAULT_DELAY_LOAD: 'DEFAULT_DELAY_LOAD',
 538     RH_FLAGS.RHF_REQUICKSTART: 'REQUICKSTART',
 539     RH_FLAGS.RHF_REQUICKSTARTED: 'REQUICKSTARTED',
 540     RH_FLAGS.RHF_CORD: 'CORD',
 541     RH_FLAGS.RHF_NO_UNRES_UNDEF: 'NO_UNRES_UNDEF',
 542     RH_FLAGS.RHF_RLD_ORDER_SAFE: 'RLD_ORDER_SAFE',
 543 }
 544
 545
 546 _DESCR_ST_INFO_TYPE = dict(
 547     STT_NOTYPE='NOTYPE',
 548     STT_OBJECT='OBJECT',
 549     STT_FUNC='FUNC',
 550     STT_SECTION='SECTION',
 551     STT_FILE='FILE',
 552     STT_COMMON='COMMON',
 553     STT_TLS='TLS',
 554     STT_NUM='NUM',
 555     STT_RELC='RELC',
 556     STT_SRELC='SRELC',
 557 )
 558
 559
 560 _DESCR_ST_INFO_BIND = dict(
 561     STB_LOCAL='LOCAL',
 562     STB_GLOBAL='GLOBAL',
 563     STB_WEAK='WEAK',
 564 )
 565
 566
 567 _DESCR_ST_VISIBILITY = dict(
 568     STV_DEFAULT='DEFAULT',
 569     STV_INTERNAL='INTERNAL',
 570     STV_HIDDEN='HIDDEN',
 571     STV_PROTECTED='PROTECTED',
 572     STV_EXPORTED='EXPORTED',
 573     STV_SINGLETON='SINGLETON',
 574     STV_ELIMINATE='ELIMINATE',
 575 )
 576
 577
 578 _DESCR_ST_SHNDX = dict(
 579     SHN_UNDEF='UND',
 580     SHN_ABS='ABS',
 581     SHN_COMMON='COM',
 582 )
 583
 584
 585 _DESCR_SYMINFO_FLAGS = {
 586     SUNW_SYMINFO_FLAGS.SYMINFO_FLG_DIRECT: 'D',
 587     SUNW_SYMINFO_FLAGS.SYMINFO_FLG_DIRECTBIND: 'B',
 588     SUNW_SYMINFO_FLAGS.SYMINFO_FLG_COPY: 'C',
 589     SUNW_SYMINFO_FLAGS.SYMINFO_FLG_LAZYLOAD: 'L',
 590     SUNW_SYMINFO_FLAGS.SYMINFO_FLG_NOEXTDIRECT: 'N',
 591     SUNW_SYMINFO_FLAGS.SYMINFO_FLG_AUXILIARY: 'A',
 592     SUNW_SYMINFO_FLAGS.SYMINFO_FLG_FILTER: 'F',
 593     SUNW_SYMINFO_FLAGS.SYMINFO_FLG_INTERPOSE: 'I',
 594     SUNW_SYMINFO_FLAGS.SYMINFO_FLG_CAP: 'S',
 595     SUNW_SYMINFO_FLAGS.SYMINFO_FLG_DEFERRED: 'P',
 596 }
 597
 598
 599 _DESCR_SYMINFO_BOUNDTO = dict(
 600     SYMINFO_BT_SELF='<self>',
 601     SYMINFO_BT_PARENT='<parent>',
 602     SYMINFO_BT_NONE='',
 603     SYMINFO_BT_EXTERN='<extern>',
 604 )
 605
 606
 607 _DESCR_VER_FLAGS = {
 608     0: '',
 609     VER_FLAGS.VER_FLG_BASE: 'BASE',
 610     VER_FLAGS.VER_FLG_WEAK: 'WEAK',
 611     VER_FLAGS.VER_FLG_INFO: 'INFO',
 612 }
 613
 614
 615 # PT_NOTE section types
 616 _DESCR_NOTE_N_TYPE = dict(
 617     NT_GNU_ABI_TAG='ABI version tag',
 618     NT_GNU_HWCAP='DSO-supplied software HWCAP info',
 619     NT_GNU_BUILD_ID='unique build ID bitstring',
 620     NT_GNU_GOLD_VERSION='gold version',
 621     NT_GNU_PROPERTY_TYPE_0='program properties'
 622 )
 623
 624
 625 # Values in GNU .note.ABI-tag notes (n_type=='NT_GNU_ABI_TAG')
 626 _DESCR_NOTE_ABI_TAG_OS = dict(
 627     ELF_NOTE_OS_LINUX='Linux',
 628     ELF_NOTE_OS_GNU='GNU',
 629     ELF_NOTE_OS_SOLARIS2='Solaris 2',
 630     ELF_NOTE_OS_FREEBSD='FreeBSD',
 631     ELF_NOTE_OS_NETBSD='NetBSD',
 632     ELF_NOTE_OS_SYLLABLE='Syllable',
 633 )
 634
 635
 636 # Values in GNU .note.gnu.property notes (n_type=='NT_GNU_PROPERTY_TYPE_0') have
 637 # different formats which need to be parsed/described differently
 638 _DESCR_NOTE_GNU_PROPERTY_TYPE_LOPROC=0xc0000000
 639 _DESCR_NOTE_GNU_PROPERTY_TYPE_HIPROC=0xdfffffff
 640 _DESCR_NOTE_GNU_PROPERTY_TYPE_LOUSER=0xe0000000
 641 _DESCR_NOTE_GNU_PROPERTY_TYPE_HIUSER=0xffffffff
 642
 643
 644 # Bit masks for GNU_PROPERTY_X86_FEATURE_1_xxx flags in the form
 645 # (mask, flag_description) in the desired output order
 646 _DESCR_NOTE_GNU_PROPERTY_X86_FEATURE_1_FLAGS = (
 647     (1, 'IBT'),
 648     (2, 'SHSTK'),
 649     (4, 'LAM_U48'),
 650     (8, 'LAM_U57'),
 651 )
 652
 653 # Bit masks for GNU_PROPERTY_X86_FEATURE_2_xxx flags in the form
 654 # (mask, flag_description) in the desired output order
 655 _DESCR_NOTE_GNU_PROPERTY_X86_FEATURE_2_FLAGS = (
 656     (1, 'x86'),
 657     (2, 'x87'),
 658     (4, 'MMX'),
 659     (8, 'XMM'),
 660     (16, 'YMM'),
 661     (32, 'ZMM'),
 662 )
 663
 664 # Same for GNU_PROPERTY_X86_SET_1_xxx
 665 _DESCR_NOTE_GNU_PROPERTY_X86_ISA_1_FLAGS = (
 666     (1, 'x86-64-baseline'),
 667     # TODO; there is a long list
 668 )
 669
 670
 671 def _reverse_dict(d, low_priority=()):
 672     """
 673     This is a tiny helper function to "reverse" the keys/values of a dictionary
 674     provided in the first argument, i.e. {k: v} becomes {v: k}.
 675
 676     The second argument (optional) provides primitive control over what to do in
 677     the case of conflicting values - if a value is present in this list, it will
 678     not override any other entries of the same value.
 679     """
 680     out = {}
 681     for k, v in d.items():
 682         if v in out and k in low_priority:
 683             continue
 684         out[v] = k
 685     return out
 686
 687 _DESCR_RELOC_TYPE_i386 = _reverse_dict(ENUM_RELOC_TYPE_i386)
 688 _DESCR_RELOC_TYPE_x64 = _reverse_dict(ENUM_RELOC_TYPE_x64)
 689 _DESCR_RELOC_TYPE_ARM = _reverse_dict(ENUM_RELOC_TYPE_ARM)
 690 _DESCR_RELOC_TYPE_AARCH64 = _reverse_dict(ENUM_RELOC_TYPE_AARCH64)
 691 _DESCR_RELOC_TYPE_PPC64 = _reverse_dict(ENUM_RELOC_TYPE_PPC64)
 692 _DESCR_RELOC_TYPE_MIPS = _reverse_dict(ENUM_RELOC_TYPE_MIPS)
 693
 694 _low_priority_D_TAG = (
 695     # these are 'meta-tags' marking semantics of numeric ranges of the enum
 696     # they should not override other tags with the same numbers
 697     # see https://docs.oracle.com/cd/E23824_01/html/819-0690/chapter6-42444.html
 698     'DT_LOOS',
 699     'DT_HIOS',
 700     'DT_LOPROC',
 701     'DT_HIPROC',
 702     'DT_ENCODING',
 703 )
 704 _DESCR_D_TAG = _reverse_dict(ENUM_D_TAG, low_priority=_low_priority_D_TAG)
 705
 706 _DESCR_ATTR_TAG_ARM = dict(
 707     TAG_FILE='File Attributes',
 708     TAG_SECTION='Section Attributes:',
 709     TAG_SYMBOL='Symbol Attributes:',
 710     TAG_CPU_RAW_NAME='Tag_CPU_raw_name: ',
 711     TAG_CPU_NAME='Tag_CPU_name: ',
 712     TAG_CPU_ARCH='Tag_CPU_arch: ',
 713     TAG_CPU_ARCH_PROFILE='Tag_CPU_arch_profile: ',
 714     TAG_ARM_ISA_USE='Tag_ARM_ISA_use: ',
 715     TAG_THUMB_ISA_USE='Tag_Thumb_ISA_use: ',
 716     TAG_FP_ARCH='Tag_FP_arch: ',
 717     TAG_WMMX_ARCH='Tag_WMMX_arch: ',
 718     TAG_ADVANCED_SIMD_ARCH='Tag_Advanced_SIMD_arch: ',
 719     TAG_PCS_CONFIG='Tag_PCS_config: ',
 720     TAG_ABI_PCS_R9_USE='Tag_ABI_PCS_R9_use: ',
 721     TAG_ABI_PCS_RW_DATA='Tag_ABI_PCS_RW_use: ',
 722     TAG_ABI_PCS_RO_DATA='Tag_ABI_PCS_RO_use: ',
 723     TAG_ABI_PCS_GOT_USE='Tag_ABI_PCS_GOT_use: ',
 724     TAG_ABI_PCS_WCHAR_T='Tag_ABI_PCS_wchar_t: ',
 725     TAG_ABI_FP_ROUNDING='Tag_ABI_FP_rounding: ',
 726     TAG_ABI_FP_DENORMAL='Tag_ABI_FP_denormal: ',
 727     TAG_ABI_FP_EXCEPTIONS='Tag_ABI_FP_exceptions: ',
 728     TAG_ABI_FP_USER_EXCEPTIONS='Tag_ABI_FP_user_exceptions: ',
 729     TAG_ABI_FP_NUMBER_MODEL='Tag_ABI_FP_number_model: ',
 730     TAG_ABI_ALIGN_NEEDED='Tag_ABI_align_needed: ',
 731     TAG_ABI_ALIGN_PRESERVED='Tag_ABI_align_preserved: ',
 732     TAG_ABI_ENUM_SIZE='Tag_ABI_enum_size: ',
 733     TAG_ABI_HARDFP_USE='Tag_ABI_HardFP_use: ',
 734     TAG_ABI_VFP_ARGS='Tag_ABI_VFP_args: ',
 735     TAG_ABI_WMMX_ARGS='Tag_ABI_WMMX_args: ',
 736     TAG_ABI_OPTIMIZATION_GOALS='Tag_ABI_optimization_goals: ',
 737     TAG_ABI_FP_OPTIMIZATION_GOALS='Tag_ABI_FP_optimization_goals: ',
 738     TAG_COMPATIBILITY='Tag_compatibility: ',
 739     TAG_CPU_UNALIGNED_ACCESS='Tag_CPU_unaligned_access: ',
 740     TAG_FP_HP_EXTENSION='Tag_FP_HP_extension: ',
 741     TAG_ABI_FP_16BIT_FORMAT='Tag_ABI_FP_16bit_format: ',
 742     TAG_MPEXTENSION_USE='Tag_MPextension_use: ',
 743     TAG_DIV_USE='Tag_DIV_use: ',
 744     TAG_NODEFAULTS='Tag_nodefaults: ',
 745     TAG_ALSO_COMPATIBLE_WITH='Tag_also_compatible_with: ',
 746     TAG_T2EE_USE='Tag_T2EE_use: ',
 747     TAG_CONFORMANCE='Tag_conformance: ',
 748     TAG_VIRTUALIZATION_USE='Tag_Virtualization_use: ',
 749     TAG_MPEXTENSION_USE_OLD='Tag_MPextension_use_old: ',
 750 )
 751
 752 _DESCR_ATTR_VAL_ARM = [
 753     None, #1
 754     None, #2
 755     None, #3
 756     None, #4
 757     None, #5
 758     { #6 TAG_CPU_ARCH
 759         0 : 'Pre-v4',
 760         1 : 'v4',
 761         2 : 'v4T',
 762         3 : 'v5T',
 763         4 : 'v5TE',
 764         5 : 'v5TEJ',
 765         6 : 'v6',
 766         7 : 'v6KZ',
 767         8 : 'v6T2',
 768         9 : 'v6K',
 769         10: 'v7',
 770         11: 'v6-M',
 771         12: 'v6S-M',
 772         13: 'v7E-M',
 773         14: 'v8',
 774         15: 'v8-R',
 775         16: 'v8-M.baseline',
 776         17: 'v8-M.mainline',
 777     },
 778     { #7 TAG_CPU_ARCH_PROFILE
 779         0x00: 'None',
 780         0x41: 'Application',
 781         0x52: 'Realtime',
 782         0x4D: 'Microcontroller',
 783         0x53: 'Application or Realtime',
 784     },
 785     { #8 TAG_ARM_ISA
 786         0: 'No',
 787         1: 'Yes',
 788     },
 789     { #9 TAG_THUMB_ISA
 790         0: 'No',
 791         1: 'Thumb-1',
 792         2: 'Thumb-2',
 793         3: 'Yes',
 794     },
 795     { #10 TAG_FP_ARCH
 796         0: 'No',
 797         1: 'VFPv1',
 798         2: 'VFPv2 ',
 799         3: 'VFPv3',
 800         4: 'VFPv3-D16',
 801         5: 'VFPv4',
 802         6: 'VFPv4-D16',
 803         7: 'FP ARM v8',
 804         8: 'FPv5/FP-D16 for ARMv8',
 805     },
 806     { #11 TAG_WMMX_ARCH
 807         0: 'No',
 808         1: 'WMMXv1',
 809         2: 'WMMXv2',
 810     },
 811     { #12 TAG_ADVANCED_SIMD_ARCH
 812         0: 'No',
 813         1: 'NEONv1',
 814         2: 'NEONv1 with Fused-MAC',
 815         3: 'NEON for ARMv8',
 816         4: 'NEON for ARMv8.1',
 817     },
 818     { #13 TAG_PCS_CONFIG
 819         0: 'None',
 820         1: 'Bare platform',
 821         2: 'Linux application',
 822         3: 'Linux DSO',
 823         4: 'PalmOS 2004',
 824         5: 'PalmOS (reserved)',
 825         6: 'SymbianOS 2004',
 826         7: 'SymbianOS (reserved)',
 827     },
 828     { #14 TAG_ABI_PCS_R9_USE
 829         0: 'v6',
 830         1: 'SB',
 831         2: 'TLS',
 832         3: 'Unused',
 833     },
 834     { #15 TAG_ABI_PCS_RW_DATA
 835         0: 'Absolute',
 836         1: 'PC-relative',
 837         2: 'SB-relative',
 838         3: 'None',
 839     },
 840     { #16 TAG_ABI_PCS_RO_DATA
 841         0: 'Absolute',
 842         1: 'PC-relative',
 843         2: 'None',
 844     },
 845     { #17 TAG_ABI_PCS_GOT_USE
 846         0: 'None',
 847         1: 'direct',
 848         2: 'GOT-indirect',
 849     },
 850     { #18 TAG_ABI_PCS_WCHAR_T
 851         0: 'None',
 852         1: '??? 1',
 853         2: '2',
 854         3: '??? 3',
 855         4: '4',
 856     },
 857     { #19 TAG_ABI_FP_ROUNDING
 858         0: 'Unused',
 859         1: 'Needed',
 860     },
 861     { #20 TAG_ABI_FP_DENORMAL
 862         0: 'Unused',
 863         1: 'Needed',
 864         2: 'Sign only',
 865     },
 866     { #21 TAG_ABI_FP_EXCEPTIONS
 867         0: 'Unused',
 868         1: 'Needed',
 869     },
 870     { #22 TAG_ABI_FP_USER_EXCEPTIONS
 871         0: 'Unused',
 872         1: 'Needed',
 873     },
 874     { #23 TAG_ABI_FP_NUMBER_MODEL
 875         0: 'Unused',
 876         1: 'Finite',
 877         2: 'RTABI',
 878         3: 'IEEE 754',
 879     },
 880     { #24 TAG_ABI_ALIGN_NEEDED
 881         0: 'None',
 882         1: '8-byte',
 883         2: '4-byte',
 884         3: '??? 3',
 885     },
 886     { #25 TAG_ABI_ALIGN_PRESERVED
 887         0: 'None',
 888         1: '8-byte, except leaf SP',
 889         2: '8-byte',
 890         3: '??? 3',
 891     },
 892     { #26 TAG_ABI_ENUM_SIZE
 893         0: 'Unused',
 894         1: 'small',
 895         2: 'int',
 896         3: 'forced to int',
 897     },
 898     { #27 TAG_ABI_HARDFP_USE
 899         0: 'As Tag_FP_arch',
 900         1: 'SP only',
 901         2: 'Reserved',
 902         3: 'Deprecated',
 903     },
 904     { #28 TAG_ABI_VFP_ARGS
 905         0: 'AAPCS',
 906         1: 'VFP registers',
 907         2: 'custom',
 908         3: 'compatible',
 909     },
 910     { #29 TAG_ABI_WMMX_ARGS
 911         0: 'AAPCS',
 912         1: 'WMMX registers',
 913         2: 'custom',
 914     },
 915     { #30 TAG_ABI_OPTIMIZATION_GOALS
 916         0: 'None',
 917         1: 'Prefer Speed',
 918         2: 'Aggressive Speed',
 919         3: 'Prefer Size',
 920         4: 'Aggressive Size',
 921         5: 'Prefer Debug',
 922         6: 'Aggressive Debug',
 923     },
 924     { #31 TAG_ABI_FP_OPTIMIZATION_GOALS
 925         0: 'None',
 926         1: 'Prefer Speed',
 927         2: 'Aggressive Speed',
 928         3: 'Prefer Size',
 929         4: 'Aggressive Size',
 930         5: 'Prefer Accuracy',
 931         6: 'Aggressive Accuracy',
 932     },
 933     { #32 TAG_COMPATIBILITY
 934         0: 'No',
 935         1: 'Yes',
 936     },
 937     None, #33
 938     { #34 TAG_CPU_UNALIGNED_ACCESS
 939         0: 'None',
 940         1: 'v6',
 941     },
 942     None, #35
 943     { #36 TAG_FP_HP_EXTENSION
 944         0: 'Not Allowed',
 945         1: 'Allowed',
 946     },
 947     None, #37
 948     { #38 TAG_ABI_FP_16BIT_FORMAT
 949         0: 'None',
 950         1: 'IEEE 754',
 951         2: 'Alternative Format',
 952     },
 953     None, #39
 954     None, #40
 955     None, #41
 956     { #42 TAG_MPEXTENSION_USE
 957         0: 'Not Allowed',
 958         1: 'Allowed',
 959     },
 960     None, #43
 961     { #44 TAG_DIV_USE
 962         0: 'Allowed in Thumb-ISA, v7-R or v7-M',
 963         1: 'Not allowed',
 964         2: 'Allowed in v7-A with integer division extension',
 965     },
 966     None, #45
 967     None, #46
 968     None, #47
 969     None, #48
 970     None, #49
 971     None, #50
 972     None, #51
 973     None, #52
 974     None, #53
 975     None, #54
 976     None, #55
 977     None, #56
 978     None, #57
 979     None, #58
 980     None, #59
 981     None, #60
 982     None, #61
 983     None, #62
 984     None, #63
 985     None, #64
 986     None, #65
 987     { #66 TAG_FP_HP_EXTENSION
 988         0: 'Not Allowed',
 989         1: 'Allowed',
 990     },
 991     None, #67
 992     { #68 TAG_VIRTUALIZATION_USE
 993         0: 'Not Allowed',
 994         1: 'TrustZone',
 995         2: 'Virtualization Extensions',
 996         3: 'TrustZone and Virtualization Extensions',
 997     },
 998     None, #69
 999     { #70 TAG_MPEXTENSION_USE_OLD
1000         0: 'Not Allowed',
1001         1: 'Allowed',
1002     },
1003 ]
1004
1005 _DESCR_ATTR_TAG_RISCV = dict(
1006     TAG_FILE='File Attributes',
1007     TAG_SECTION='Section Attributes:',
1008     TAG_SYMBOL='Symbol Attributes:',
1009     TAG_STACK_ALIGN='Tag_RISCV_stack_align: ',
1010     TAG_ARCH='Tag_RISCV_arch: ',
1011     TAG_UNALIGNED='Tag_RISCV_unaligned_access: ',
1012 )
1013
1014 _DESCR_ATTR_VAL_RISCV = [
1015     None, #1
1016     None, #2
1017     None, #3
1018     { #4 TAG_RISCV_stack_align
1019         4: '4-bytes',
1020         16: '16-bytes',
1021     },
1022     None, #5 TAG_RISCV_arch
1023     { #6 TAG_RISCV_unaligned_access
1024         0: 'Not Allowed',
1025         1: 'Allowed',
1026     },
1027 ]