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dwarf_defs.go (16437B)


      1 // Copyright 2010 The Go Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style
      3 // license that can be found in the LICENSE file.
      4 
      5 package dwarf
      6 
      7 // Cut, pasted, tr-and-awk'ed from tables in
      8 // http://dwarfstd.org/doc/Dwarf3.pdf
      9 
     10 // Table 18
     11 const (
     12 	DW_TAG_array_type               = 0x01
     13 	DW_TAG_class_type               = 0x02
     14 	DW_TAG_entry_point              = 0x03
     15 	DW_TAG_enumeration_type         = 0x04
     16 	DW_TAG_formal_parameter         = 0x05
     17 	DW_TAG_imported_declaration     = 0x08
     18 	DW_TAG_label                    = 0x0a
     19 	DW_TAG_lexical_block            = 0x0b
     20 	DW_TAG_member                   = 0x0d
     21 	DW_TAG_pointer_type             = 0x0f
     22 	DW_TAG_reference_type           = 0x10
     23 	DW_TAG_compile_unit             = 0x11
     24 	DW_TAG_string_type              = 0x12
     25 	DW_TAG_structure_type           = 0x13
     26 	DW_TAG_subroutine_type          = 0x15
     27 	DW_TAG_typedef                  = 0x16
     28 	DW_TAG_union_type               = 0x17
     29 	DW_TAG_unspecified_parameters   = 0x18
     30 	DW_TAG_variant                  = 0x19
     31 	DW_TAG_common_block             = 0x1a
     32 	DW_TAG_common_inclusion         = 0x1b
     33 	DW_TAG_inheritance              = 0x1c
     34 	DW_TAG_inlined_subroutine       = 0x1d
     35 	DW_TAG_module                   = 0x1e
     36 	DW_TAG_ptr_to_member_type       = 0x1f
     37 	DW_TAG_set_type                 = 0x20
     38 	DW_TAG_subrange_type            = 0x21
     39 	DW_TAG_with_stmt                = 0x22
     40 	DW_TAG_access_declaration       = 0x23
     41 	DW_TAG_base_type                = 0x24
     42 	DW_TAG_catch_block              = 0x25
     43 	DW_TAG_const_type               = 0x26
     44 	DW_TAG_constant                 = 0x27
     45 	DW_TAG_enumerator               = 0x28
     46 	DW_TAG_file_type                = 0x29
     47 	DW_TAG_friend                   = 0x2a
     48 	DW_TAG_namelist                 = 0x2b
     49 	DW_TAG_namelist_item            = 0x2c
     50 	DW_TAG_packed_type              = 0x2d
     51 	DW_TAG_subprogram               = 0x2e
     52 	DW_TAG_template_type_parameter  = 0x2f
     53 	DW_TAG_template_value_parameter = 0x30
     54 	DW_TAG_thrown_type              = 0x31
     55 	DW_TAG_try_block                = 0x32
     56 	DW_TAG_variant_part             = 0x33
     57 	DW_TAG_variable                 = 0x34
     58 	DW_TAG_volatile_type            = 0x35
     59 	// Dwarf3
     60 	DW_TAG_dwarf_procedure  = 0x36
     61 	DW_TAG_restrict_type    = 0x37
     62 	DW_TAG_interface_type   = 0x38
     63 	DW_TAG_namespace        = 0x39
     64 	DW_TAG_imported_module  = 0x3a
     65 	DW_TAG_unspecified_type = 0x3b
     66 	DW_TAG_partial_unit     = 0x3c
     67 	DW_TAG_imported_unit    = 0x3d
     68 	DW_TAG_condition        = 0x3f
     69 	DW_TAG_shared_type      = 0x40
     70 	// Dwarf4
     71 	DW_TAG_type_unit             = 0x41
     72 	DW_TAG_rvalue_reference_type = 0x42
     73 	DW_TAG_template_alias        = 0x43
     74 
     75 	// User defined
     76 	DW_TAG_lo_user = 0x4080
     77 	DW_TAG_hi_user = 0xffff
     78 )
     79 
     80 // Table 19
     81 const (
     82 	DW_CHILDREN_no  = 0x00
     83 	DW_CHILDREN_yes = 0x01
     84 )
     85 
     86 // Not from the spec, but logically belongs here
     87 const (
     88 	DW_CLS_ADDRESS = 0x01 + iota
     89 	DW_CLS_BLOCK
     90 	DW_CLS_CONSTANT
     91 	DW_CLS_FLAG
     92 	DW_CLS_PTR // lineptr, loclistptr, macptr, rangelistptr
     93 	DW_CLS_REFERENCE
     94 	DW_CLS_ADDRLOC
     95 	DW_CLS_STRING
     96 
     97 	// Go-specific internal hackery.
     98 	DW_CLS_GO_TYPEREF
     99 )
    100 
    101 // Table 20
    102 const (
    103 	DW_AT_sibling              = 0x01 // reference
    104 	DW_AT_location             = 0x02 // block, loclistptr
    105 	DW_AT_name                 = 0x03 // string
    106 	DW_AT_ordering             = 0x09 // constant
    107 	DW_AT_byte_size            = 0x0b // block, constant, reference
    108 	DW_AT_bit_offset           = 0x0c // block, constant, reference
    109 	DW_AT_bit_size             = 0x0d // block, constant, reference
    110 	DW_AT_stmt_list            = 0x10 // lineptr
    111 	DW_AT_low_pc               = 0x11 // address
    112 	DW_AT_high_pc              = 0x12 // address
    113 	DW_AT_language             = 0x13 // constant
    114 	DW_AT_discr                = 0x15 // reference
    115 	DW_AT_discr_value          = 0x16 // constant
    116 	DW_AT_visibility           = 0x17 // constant
    117 	DW_AT_import               = 0x18 // reference
    118 	DW_AT_string_length        = 0x19 // block, loclistptr
    119 	DW_AT_common_reference     = 0x1a // reference
    120 	DW_AT_comp_dir             = 0x1b // string
    121 	DW_AT_const_value          = 0x1c // block, constant, string
    122 	DW_AT_containing_type      = 0x1d // reference
    123 	DW_AT_default_value        = 0x1e // reference
    124 	DW_AT_inline               = 0x20 // constant
    125 	DW_AT_is_optional          = 0x21 // flag
    126 	DW_AT_lower_bound          = 0x22 // block, constant, reference
    127 	DW_AT_producer             = 0x25 // string
    128 	DW_AT_prototyped           = 0x27 // flag
    129 	DW_AT_return_addr          = 0x2a // block, loclistptr
    130 	DW_AT_start_scope          = 0x2c // constant
    131 	DW_AT_bit_stride           = 0x2e // constant
    132 	DW_AT_upper_bound          = 0x2f // block, constant, reference
    133 	DW_AT_abstract_origin      = 0x31 // reference
    134 	DW_AT_accessibility        = 0x32 // constant
    135 	DW_AT_address_class        = 0x33 // constant
    136 	DW_AT_artificial           = 0x34 // flag
    137 	DW_AT_base_types           = 0x35 // reference
    138 	DW_AT_calling_convention   = 0x36 // constant
    139 	DW_AT_count                = 0x37 // block, constant, reference
    140 	DW_AT_data_member_location = 0x38 // block, constant, loclistptr
    141 	DW_AT_decl_column          = 0x39 // constant
    142 	DW_AT_decl_file            = 0x3a // constant
    143 	DW_AT_decl_line            = 0x3b // constant
    144 	DW_AT_declaration          = 0x3c // flag
    145 	DW_AT_discr_list           = 0x3d // block
    146 	DW_AT_encoding             = 0x3e // constant
    147 	DW_AT_external             = 0x3f // flag
    148 	DW_AT_frame_base           = 0x40 // block, loclistptr
    149 	DW_AT_friend               = 0x41 // reference
    150 	DW_AT_identifier_case      = 0x42 // constant
    151 	DW_AT_macro_info           = 0x43 // macptr
    152 	DW_AT_namelist_item        = 0x44 // block
    153 	DW_AT_priority             = 0x45 // reference
    154 	DW_AT_segment              = 0x46 // block, loclistptr
    155 	DW_AT_specification        = 0x47 // reference
    156 	DW_AT_static_link          = 0x48 // block, loclistptr
    157 	DW_AT_type                 = 0x49 // reference
    158 	DW_AT_use_location         = 0x4a // block, loclistptr
    159 	DW_AT_variable_parameter   = 0x4b // flag
    160 	DW_AT_virtuality           = 0x4c // constant
    161 	DW_AT_vtable_elem_location = 0x4d // block, loclistptr
    162 	// Dwarf3
    163 	DW_AT_allocated      = 0x4e // block, constant, reference
    164 	DW_AT_associated     = 0x4f // block, constant, reference
    165 	DW_AT_data_location  = 0x50 // block
    166 	DW_AT_byte_stride    = 0x51 // block, constant, reference
    167 	DW_AT_entry_pc       = 0x52 // address
    168 	DW_AT_use_UTF8       = 0x53 // flag
    169 	DW_AT_extension      = 0x54 // reference
    170 	DW_AT_ranges         = 0x55 // rangelistptr
    171 	DW_AT_trampoline     = 0x56 // address, flag, reference, string
    172 	DW_AT_call_column    = 0x57 // constant
    173 	DW_AT_call_file      = 0x58 // constant
    174 	DW_AT_call_line      = 0x59 // constant
    175 	DW_AT_description    = 0x5a // string
    176 	DW_AT_binary_scale   = 0x5b // constant
    177 	DW_AT_decimal_scale  = 0x5c // constant
    178 	DW_AT_small          = 0x5d // reference
    179 	DW_AT_decimal_sign   = 0x5e // constant
    180 	DW_AT_digit_count    = 0x5f // constant
    181 	DW_AT_picture_string = 0x60 // string
    182 	DW_AT_mutable        = 0x61 // flag
    183 	DW_AT_threads_scaled = 0x62 // flag
    184 	DW_AT_explicit       = 0x63 // flag
    185 	DW_AT_object_pointer = 0x64 // reference
    186 	DW_AT_endianity      = 0x65 // constant
    187 	DW_AT_elemental      = 0x66 // flag
    188 	DW_AT_pure           = 0x67 // flag
    189 	DW_AT_recursive      = 0x68 // flag
    190 
    191 	DW_AT_lo_user = 0x2000 // ---
    192 	DW_AT_hi_user = 0x3fff // ---
    193 )
    194 
    195 // Table 21
    196 const (
    197 	DW_FORM_addr      = 0x01 // address
    198 	DW_FORM_block2    = 0x03 // block
    199 	DW_FORM_block4    = 0x04 // block
    200 	DW_FORM_data2     = 0x05 // constant
    201 	DW_FORM_data4     = 0x06 // constant, lineptr, loclistptr, macptr, rangelistptr
    202 	DW_FORM_data8     = 0x07 // constant, lineptr, loclistptr, macptr, rangelistptr
    203 	DW_FORM_string    = 0x08 // string
    204 	DW_FORM_block     = 0x09 // block
    205 	DW_FORM_block1    = 0x0a // block
    206 	DW_FORM_data1     = 0x0b // constant
    207 	DW_FORM_flag      = 0x0c // flag
    208 	DW_FORM_sdata     = 0x0d // constant
    209 	DW_FORM_strp      = 0x0e // string
    210 	DW_FORM_udata     = 0x0f // constant
    211 	DW_FORM_ref_addr  = 0x10 // reference
    212 	DW_FORM_ref1      = 0x11 // reference
    213 	DW_FORM_ref2      = 0x12 // reference
    214 	DW_FORM_ref4      = 0x13 // reference
    215 	DW_FORM_ref8      = 0x14 // reference
    216 	DW_FORM_ref_udata = 0x15 // reference
    217 	DW_FORM_indirect  = 0x16 // (see Section 7.5.3)
    218 	// Dwarf4
    219 	DW_FORM_sec_offset   = 0x17 // lineptr, loclistptr, macptr, rangelistptr
    220 	DW_FORM_exprloc      = 0x18 // exprloc
    221 	DW_FORM_flag_present = 0x19 // flag
    222 	DW_FORM_ref_sig8     = 0x20 // reference
    223 	// Pseudo-form: expanded to data4 on IOS, udata elsewhere.
    224 	DW_FORM_udata_pseudo = 0x99
    225 )
    226 
    227 // Table 24 (#operands, notes)
    228 const (
    229 	DW_OP_addr                = 0x03 // 1 constant address (size target specific)
    230 	DW_OP_deref               = 0x06 // 0
    231 	DW_OP_const1u             = 0x08 // 1 1-byte constant
    232 	DW_OP_const1s             = 0x09 // 1 1-byte constant
    233 	DW_OP_const2u             = 0x0a // 1 2-byte constant
    234 	DW_OP_const2s             = 0x0b // 1 2-byte constant
    235 	DW_OP_const4u             = 0x0c // 1 4-byte constant
    236 	DW_OP_const4s             = 0x0d // 1 4-byte constant
    237 	DW_OP_const8u             = 0x0e // 1 8-byte constant
    238 	DW_OP_const8s             = 0x0f // 1 8-byte constant
    239 	DW_OP_constu              = 0x10 // 1 ULEB128 constant
    240 	DW_OP_consts              = 0x11 // 1 SLEB128 constant
    241 	DW_OP_dup                 = 0x12 // 0
    242 	DW_OP_drop                = 0x13 // 0
    243 	DW_OP_over                = 0x14 // 0
    244 	DW_OP_pick                = 0x15 // 1 1-byte stack index
    245 	DW_OP_swap                = 0x16 // 0
    246 	DW_OP_rot                 = 0x17 // 0
    247 	DW_OP_xderef              = 0x18 // 0
    248 	DW_OP_abs                 = 0x19 // 0
    249 	DW_OP_and                 = 0x1a // 0
    250 	DW_OP_div                 = 0x1b // 0
    251 	DW_OP_minus               = 0x1c // 0
    252 	DW_OP_mod                 = 0x1d // 0
    253 	DW_OP_mul                 = 0x1e // 0
    254 	DW_OP_neg                 = 0x1f // 0
    255 	DW_OP_not                 = 0x20 // 0
    256 	DW_OP_or                  = 0x21 // 0
    257 	DW_OP_plus                = 0x22 // 0
    258 	DW_OP_plus_uconst         = 0x23 // 1 ULEB128 addend
    259 	DW_OP_shl                 = 0x24 // 0
    260 	DW_OP_shr                 = 0x25 // 0
    261 	DW_OP_shra                = 0x26 // 0
    262 	DW_OP_xor                 = 0x27 // 0
    263 	DW_OP_skip                = 0x2f // 1 signed 2-byte constant
    264 	DW_OP_bra                 = 0x28 // 1 signed 2-byte constant
    265 	DW_OP_eq                  = 0x29 // 0
    266 	DW_OP_ge                  = 0x2a // 0
    267 	DW_OP_gt                  = 0x2b // 0
    268 	DW_OP_le                  = 0x2c // 0
    269 	DW_OP_lt                  = 0x2d // 0
    270 	DW_OP_ne                  = 0x2e // 0
    271 	DW_OP_lit0                = 0x30 // 0 ...
    272 	DW_OP_lit31               = 0x4f // 0 literals 0..31 = (DW_OP_lit0 + literal)
    273 	DW_OP_reg0                = 0x50 // 0 ..
    274 	DW_OP_reg31               = 0x6f // 0 reg 0..31 = (DW_OP_reg0 + regnum)
    275 	DW_OP_breg0               = 0x70 // 1 ...
    276 	DW_OP_breg31              = 0x8f // 1 SLEB128 offset base register 0..31 = (DW_OP_breg0 + regnum)
    277 	DW_OP_regx                = 0x90 // 1 ULEB128 register
    278 	DW_OP_fbreg               = 0x91 // 1 SLEB128 offset
    279 	DW_OP_bregx               = 0x92 // 2 ULEB128 register followed by SLEB128 offset
    280 	DW_OP_piece               = 0x93 // 1 ULEB128 size of piece addressed
    281 	DW_OP_deref_size          = 0x94 // 1 1-byte size of data retrieved
    282 	DW_OP_xderef_size         = 0x95 // 1 1-byte size of data retrieved
    283 	DW_OP_nop                 = 0x96 // 0
    284 	DW_OP_push_object_address = 0x97 // 0
    285 	DW_OP_call2               = 0x98 // 1 2-byte offset of DIE
    286 	DW_OP_call4               = 0x99 // 1 4-byte offset of DIE
    287 	DW_OP_call_ref            = 0x9a // 1 4- or 8-byte offset of DIE
    288 	DW_OP_form_tls_address    = 0x9b // 0
    289 	DW_OP_call_frame_cfa      = 0x9c // 0
    290 	DW_OP_bit_piece           = 0x9d // 2
    291 	DW_OP_lo_user             = 0xe0
    292 	DW_OP_hi_user             = 0xff
    293 )
    294 
    295 // Table 25
    296 const (
    297 	DW_ATE_address         = 0x01
    298 	DW_ATE_boolean         = 0x02
    299 	DW_ATE_complex_float   = 0x03
    300 	DW_ATE_float           = 0x04
    301 	DW_ATE_signed          = 0x05
    302 	DW_ATE_signed_char     = 0x06
    303 	DW_ATE_unsigned        = 0x07
    304 	DW_ATE_unsigned_char   = 0x08
    305 	DW_ATE_imaginary_float = 0x09
    306 	DW_ATE_packed_decimal  = 0x0a
    307 	DW_ATE_numeric_string  = 0x0b
    308 	DW_ATE_edited          = 0x0c
    309 	DW_ATE_signed_fixed    = 0x0d
    310 	DW_ATE_unsigned_fixed  = 0x0e
    311 	DW_ATE_decimal_float   = 0x0f
    312 	DW_ATE_lo_user         = 0x80
    313 	DW_ATE_hi_user         = 0xff
    314 )
    315 
    316 // Table 26
    317 const (
    318 	DW_DS_unsigned           = 0x01
    319 	DW_DS_leading_overpunch  = 0x02
    320 	DW_DS_trailing_overpunch = 0x03
    321 	DW_DS_leading_separate   = 0x04
    322 	DW_DS_trailing_separate  = 0x05
    323 )
    324 
    325 // Table 27
    326 const (
    327 	DW_END_default = 0x00
    328 	DW_END_big     = 0x01
    329 	DW_END_little  = 0x02
    330 	DW_END_lo_user = 0x40
    331 	DW_END_hi_user = 0xff
    332 )
    333 
    334 // Table 28
    335 const (
    336 	DW_ACCESS_public    = 0x01
    337 	DW_ACCESS_protected = 0x02
    338 	DW_ACCESS_private   = 0x03
    339 )
    340 
    341 // Table 29
    342 const (
    343 	DW_VIS_local     = 0x01
    344 	DW_VIS_exported  = 0x02
    345 	DW_VIS_qualified = 0x03
    346 )
    347 
    348 // Table 30
    349 const (
    350 	DW_VIRTUALITY_none         = 0x00
    351 	DW_VIRTUALITY_virtual      = 0x01
    352 	DW_VIRTUALITY_pure_virtual = 0x02
    353 )
    354 
    355 // Table 31
    356 const (
    357 	DW_LANG_C89         = 0x0001
    358 	DW_LANG_C           = 0x0002
    359 	DW_LANG_Ada83       = 0x0003
    360 	DW_LANG_C_plus_plus = 0x0004
    361 	DW_LANG_Cobol74     = 0x0005
    362 	DW_LANG_Cobol85     = 0x0006
    363 	DW_LANG_Fortran77   = 0x0007
    364 	DW_LANG_Fortran90   = 0x0008
    365 	DW_LANG_Pascal83    = 0x0009
    366 	DW_LANG_Modula2     = 0x000a
    367 	// Dwarf3
    368 	DW_LANG_Java           = 0x000b
    369 	DW_LANG_C99            = 0x000c
    370 	DW_LANG_Ada95          = 0x000d
    371 	DW_LANG_Fortran95      = 0x000e
    372 	DW_LANG_PLI            = 0x000f
    373 	DW_LANG_ObjC           = 0x0010
    374 	DW_LANG_ObjC_plus_plus = 0x0011
    375 	DW_LANG_UPC            = 0x0012
    376 	DW_LANG_D              = 0x0013
    377 	// Dwarf4
    378 	DW_LANG_Python = 0x0014
    379 	// Dwarf5
    380 	DW_LANG_Go = 0x0016
    381 
    382 	DW_LANG_lo_user = 0x8000
    383 	DW_LANG_hi_user = 0xffff
    384 )
    385 
    386 // Table 32
    387 const (
    388 	DW_ID_case_sensitive   = 0x00
    389 	DW_ID_up_case          = 0x01
    390 	DW_ID_down_case        = 0x02
    391 	DW_ID_case_insensitive = 0x03
    392 )
    393 
    394 // Table 33
    395 const (
    396 	DW_CC_normal  = 0x01
    397 	DW_CC_program = 0x02
    398 	DW_CC_nocall  = 0x03
    399 	DW_CC_lo_user = 0x40
    400 	DW_CC_hi_user = 0xff
    401 )
    402 
    403 // Table 34
    404 const (
    405 	DW_INL_not_inlined          = 0x00
    406 	DW_INL_inlined              = 0x01
    407 	DW_INL_declared_not_inlined = 0x02
    408 	DW_INL_declared_inlined     = 0x03
    409 )
    410 
    411 // Table 35
    412 const (
    413 	DW_ORD_row_major = 0x00
    414 	DW_ORD_col_major = 0x01
    415 )
    416 
    417 // Table 36
    418 const (
    419 	DW_DSC_label = 0x00
    420 	DW_DSC_range = 0x01
    421 )
    422 
    423 // Table 37
    424 const (
    425 	DW_LNS_copy             = 0x01
    426 	DW_LNS_advance_pc       = 0x02
    427 	DW_LNS_advance_line     = 0x03
    428 	DW_LNS_set_file         = 0x04
    429 	DW_LNS_set_column       = 0x05
    430 	DW_LNS_negate_stmt      = 0x06
    431 	DW_LNS_set_basic_block  = 0x07
    432 	DW_LNS_const_add_pc     = 0x08
    433 	DW_LNS_fixed_advance_pc = 0x09
    434 	// Dwarf3
    435 	DW_LNS_set_prologue_end   = 0x0a
    436 	DW_LNS_set_epilogue_begin = 0x0b
    437 	DW_LNS_set_isa            = 0x0c
    438 )
    439 
    440 // Table 38
    441 const (
    442 	DW_LNE_end_sequence = 0x01
    443 	DW_LNE_set_address  = 0x02
    444 	DW_LNE_define_file  = 0x03
    445 	DW_LNE_lo_user      = 0x80
    446 	DW_LNE_hi_user      = 0xff
    447 )
    448 
    449 // Table 39
    450 const (
    451 	DW_MACINFO_define     = 0x01
    452 	DW_MACINFO_undef      = 0x02
    453 	DW_MACINFO_start_file = 0x03
    454 	DW_MACINFO_end_file   = 0x04
    455 	DW_MACINFO_vendor_ext = 0xff
    456 )
    457 
    458 // Table 40.
    459 const (
    460 	// operand,...
    461 	DW_CFA_nop              = 0x00
    462 	DW_CFA_set_loc          = 0x01 // address
    463 	DW_CFA_advance_loc1     = 0x02 // 1-byte delta
    464 	DW_CFA_advance_loc2     = 0x03 // 2-byte delta
    465 	DW_CFA_advance_loc4     = 0x04 // 4-byte delta
    466 	DW_CFA_offset_extended  = 0x05 // ULEB128 register, ULEB128 offset
    467 	DW_CFA_restore_extended = 0x06 // ULEB128 register
    468 	DW_CFA_undefined        = 0x07 // ULEB128 register
    469 	DW_CFA_same_value       = 0x08 // ULEB128 register
    470 	DW_CFA_register         = 0x09 // ULEB128 register, ULEB128 register
    471 	DW_CFA_remember_state   = 0x0a
    472 	DW_CFA_restore_state    = 0x0b
    473 
    474 	DW_CFA_def_cfa            = 0x0c // ULEB128 register, ULEB128 offset
    475 	DW_CFA_def_cfa_register   = 0x0d // ULEB128 register
    476 	DW_CFA_def_cfa_offset     = 0x0e // ULEB128 offset
    477 	DW_CFA_def_cfa_expression = 0x0f // BLOCK
    478 	DW_CFA_expression         = 0x10 // ULEB128 register, BLOCK
    479 	DW_CFA_offset_extended_sf = 0x11 // ULEB128 register, SLEB128 offset
    480 	DW_CFA_def_cfa_sf         = 0x12 // ULEB128 register, SLEB128 offset
    481 	DW_CFA_def_cfa_offset_sf  = 0x13 // SLEB128 offset
    482 	DW_CFA_val_offset         = 0x14 // ULEB128, ULEB128
    483 	DW_CFA_val_offset_sf      = 0x15 // ULEB128, SLEB128
    484 	DW_CFA_val_expression     = 0x16 // ULEB128, BLOCK
    485 
    486 	DW_CFA_lo_user = 0x1c
    487 	DW_CFA_hi_user = 0x3f
    488 
    489 	// Opcodes that take an addend operand.
    490 	DW_CFA_advance_loc = 0x1 << 6 // +delta
    491 	DW_CFA_offset      = 0x2 << 6 // +register (ULEB128 offset)
    492 	DW_CFA_restore     = 0x3 << 6 // +register
    493 )