libunwind/src/dwarf2.h

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9
  10 /*
  11    These constants were taken from version 3 of the DWARF standard,
  12    which is Copyright (c) 2005 Free Standards Group, and
  13    Copyright (c) 1992, 1993 UNIX International, Inc.
  14 */
  15
  16 #ifndef __DWARF2__
  17 #define __DWARF2__
  18
  19 // DWARF unwind instructions
  20 enum {
  21   DW_CFA_nop                 = 0x0,
  22   DW_CFA_set_loc             = 0x1,
  23   DW_CFA_advance_loc1        = 0x2,
  24   DW_CFA_advance_loc2        = 0x3,
  25   DW_CFA_advance_loc4        = 0x4,
  26   DW_CFA_offset_extended     = 0x5,
  27   DW_CFA_restore_extended    = 0x6,
  28   DW_CFA_undefined           = 0x7,
  29   DW_CFA_same_value          = 0x8,
  30   DW_CFA_register            = 0x9,
  31   DW_CFA_remember_state      = 0xA,
  32   DW_CFA_restore_state       = 0xB,
  33   DW_CFA_def_cfa             = 0xC,
  34   DW_CFA_def_cfa_register    = 0xD,
  35   DW_CFA_def_cfa_offset      = 0xE,
  36   DW_CFA_def_cfa_expression  = 0xF,
  37   DW_CFA_expression         = 0x10,
  38   DW_CFA_offset_extended_sf = 0x11,
  39   DW_CFA_def_cfa_sf         = 0x12,
  40   DW_CFA_def_cfa_offset_sf  = 0x13,
  41   DW_CFA_val_offset         = 0x14,
  42   DW_CFA_val_offset_sf      = 0x15,
  43   DW_CFA_val_expression     = 0x16,
  44   DW_CFA_advance_loc        = 0x40, // high 2 bits are 0x1, lower 6 bits are delta
  45   DW_CFA_offset             = 0x80, // high 2 bits are 0x2, lower 6 bits are register
  46   DW_CFA_restore            = 0xC0, // high 2 bits are 0x3, lower 6 bits are register
  47
  48   // GNU extensions
  49   DW_CFA_GNU_window_save              = 0x2D,
  50   DW_CFA_GNU_args_size                = 0x2E,
  51   DW_CFA_GNU_negative_offset_extended = 0x2F,
  52
  53   // AARCH64 extensions
  54   DW_CFA_AARCH64_negate_ra_state      = 0x2D
  55 };
  56
  57
  58 // FSF exception handling Pointer-Encoding constants
  59 // Used in CFI augmentation by GCC
  60 enum {
  61   DW_EH_PE_ptr       = 0x00,
  62   DW_EH_PE_uleb128   = 0x01,
  63   DW_EH_PE_udata2    = 0x02,
  64   DW_EH_PE_udata4    = 0x03,
  65   DW_EH_PE_udata8    = 0x04,
  66   DW_EH_PE_signed    = 0x08,
  67   DW_EH_PE_sleb128   = 0x09,
  68   DW_EH_PE_sdata2    = 0x0A,
  69   DW_EH_PE_sdata4    = 0x0B,
  70   DW_EH_PE_sdata8    = 0x0C,
  71   DW_EH_PE_absptr    = 0x00,
  72   DW_EH_PE_pcrel     = 0x10,
  73   DW_EH_PE_textrel   = 0x20,
  74   DW_EH_PE_datarel   = 0x30,
  75   DW_EH_PE_funcrel   = 0x40,
  76   DW_EH_PE_aligned   = 0x50,
  77   DW_EH_PE_indirect  = 0x80,
  78   DW_EH_PE_omit      = 0xFF
  79 };
  80
  81
  82 // DWARF expressions
  83 enum {
  84   DW_OP_addr               = 0x03, // constant address (size target specific)
  85   DW_OP_deref              = 0x06,
  86   DW_OP_const1u            = 0x08, // 1-byte constant
  87   DW_OP_const1s            = 0x09, // 1-byte constant
  88   DW_OP_const2u            = 0x0A, // 2-byte constant
  89   DW_OP_const2s            = 0x0B, // 2-byte constant
  90   DW_OP_const4u            = 0x0C, // 4-byte constant
  91   DW_OP_const4s            = 0x0D, // 4-byte constant
  92   DW_OP_const8u            = 0x0E, // 8-byte constant
  93   DW_OP_const8s            = 0x0F, // 8-byte constant
  94   DW_OP_constu             = 0x10, // ULEB128 constant
  95   DW_OP_consts             = 0x11, // SLEB128 constant
  96   DW_OP_dup                = 0x12,
  97   DW_OP_drop               = 0x13,
  98   DW_OP_over               = 0x14,
  99   DW_OP_pick               = 0x15, // 1-byte stack index
 100   DW_OP_swap               = 0x16,
 101   DW_OP_rot                = 0x17,
 102   DW_OP_xderef             = 0x18,
 103   DW_OP_abs                = 0x19,
 104   DW_OP_and                = 0x1A,
 105   DW_OP_div                = 0x1B,
 106   DW_OP_minus              = 0x1C,
 107   DW_OP_mod                = 0x1D,
 108   DW_OP_mul                = 0x1E,
 109   DW_OP_neg                = 0x1F,
 110   DW_OP_not                = 0x20,
 111   DW_OP_or                 = 0x21,
 112   DW_OP_plus               = 0x22,
 113   DW_OP_plus_uconst        = 0x23, // ULEB128 addend
 114   DW_OP_shl                = 0x24,
 115   DW_OP_shr                = 0x25,
 116   DW_OP_shra               = 0x26,
 117   DW_OP_xor                = 0x27,
 118   DW_OP_skip               = 0x2F, // signed 2-byte constant
 119   DW_OP_bra                = 0x28, // signed 2-byte constant
 120   DW_OP_eq                 = 0x29,
 121   DW_OP_ge                 = 0x2A,
 122   DW_OP_gt                 = 0x2B,
 123   DW_OP_le                 = 0x2C,
 124   DW_OP_lt                 = 0x2D,
 125   DW_OP_ne                 = 0x2E,
 126   DW_OP_lit0               = 0x30, // Literal 0
 127   DW_OP_lit1               = 0x31, // Literal 1
 128   DW_OP_lit2               = 0x32, // Literal 2
 129   DW_OP_lit3               = 0x33, // Literal 3
 130   DW_OP_lit4               = 0x34, // Literal 4
 131   DW_OP_lit5               = 0x35, // Literal 5
 132   DW_OP_lit6               = 0x36, // Literal 6
 133   DW_OP_lit7               = 0x37, // Literal 7
 134   DW_OP_lit8               = 0x38, // Literal 8
 135   DW_OP_lit9               = 0x39, // Literal 9
 136   DW_OP_lit10              = 0x3A, // Literal 10
 137   DW_OP_lit11              = 0x3B, // Literal 11
 138   DW_OP_lit12              = 0x3C, // Literal 12
 139   DW_OP_lit13              = 0x3D, // Literal 13
 140   DW_OP_lit14              = 0x3E, // Literal 14
 141   DW_OP_lit15              = 0x3F, // Literal 15
 142   DW_OP_lit16              = 0x40, // Literal 16
 143   DW_OP_lit17              = 0x41, // Literal 17
 144   DW_OP_lit18              = 0x42, // Literal 18
 145   DW_OP_lit19              = 0x43, // Literal 19
 146   DW_OP_lit20              = 0x44, // Literal 20
 147   DW_OP_lit21              = 0x45, // Literal 21
 148   DW_OP_lit22              = 0x46, // Literal 22
 149   DW_OP_lit23              = 0x47, // Literal 23
 150   DW_OP_lit24              = 0x48, // Literal 24
 151   DW_OP_lit25              = 0x49, // Literal 25
 152   DW_OP_lit26              = 0x4A, // Literal 26
 153   DW_OP_lit27              = 0x4B, // Literal 27
 154   DW_OP_lit28              = 0x4C, // Literal 28
 155   DW_OP_lit29              = 0x4D, // Literal 29
 156   DW_OP_lit30              = 0x4E, // Literal 30
 157   DW_OP_lit31              = 0x4F, // Literal 31
 158   DW_OP_reg0               = 0x50, // Contents of reg0
 159   DW_OP_reg1               = 0x51, // Contents of reg1
 160   DW_OP_reg2               = 0x52, // Contents of reg2
 161   DW_OP_reg3               = 0x53, // Contents of reg3
 162   DW_OP_reg4               = 0x54, // Contents of reg4
 163   DW_OP_reg5               = 0x55, // Contents of reg5
 164   DW_OP_reg6               = 0x56, // Contents of reg6
 165   DW_OP_reg7               = 0x57, // Contents of reg7
 166   DW_OP_reg8               = 0x58, // Contents of reg8
 167   DW_OP_reg9               = 0x59, // Contents of reg9
 168   DW_OP_reg10              = 0x5A, // Contents of reg10
 169   DW_OP_reg11              = 0x5B, // Contents of reg11
 170   DW_OP_reg12              = 0x5C, // Contents of reg12
 171   DW_OP_reg13              = 0x5D, // Contents of reg13
 172   DW_OP_reg14              = 0x5E, // Contents of reg14
 173   DW_OP_reg15              = 0x5F, // Contents of reg15
 174   DW_OP_reg16              = 0x60, // Contents of reg16
 175   DW_OP_reg17              = 0x61, // Contents of reg17
 176   DW_OP_reg18              = 0x62, // Contents of reg18
 177   DW_OP_reg19              = 0x63, // Contents of reg19
 178   DW_OP_reg20              = 0x64, // Contents of reg20
 179   DW_OP_reg21              = 0x65, // Contents of reg21
 180   DW_OP_reg22              = 0x66, // Contents of reg22
 181   DW_OP_reg23              = 0x67, // Contents of reg23
 182   DW_OP_reg24              = 0x68, // Contents of reg24
 183   DW_OP_reg25              = 0x69, // Contents of reg25
 184   DW_OP_reg26              = 0x6A, // Contents of reg26
 185   DW_OP_reg27              = 0x6B, // Contents of reg27
 186   DW_OP_reg28              = 0x6C, // Contents of reg28
 187   DW_OP_reg29              = 0x6D, // Contents of reg29
 188   DW_OP_reg30              = 0x6E, // Contents of reg30
 189   DW_OP_reg31              = 0x6F, // Contents of reg31
 190   DW_OP_breg0              = 0x70, // base register 0 + SLEB128 offset
 191   DW_OP_breg1              = 0x71, // base register 1 + SLEB128 offset
 192   DW_OP_breg2              = 0x72, // base register 2 + SLEB128 offset
 193   DW_OP_breg3              = 0x73, // base register 3 + SLEB128 offset
 194   DW_OP_breg4              = 0x74, // base register 4 + SLEB128 offset
 195   DW_OP_breg5              = 0x75, // base register 5 + SLEB128 offset
 196   DW_OP_breg6              = 0x76, // base register 6 + SLEB128 offset
 197   DW_OP_breg7              = 0x77, // base register 7 + SLEB128 offset
 198   DW_OP_breg8              = 0x78, // base register 8 + SLEB128 offset
 199   DW_OP_breg9              = 0x79, // base register 9 + SLEB128 offset
 200   DW_OP_breg10             = 0x7A, // base register 10 + SLEB128 offset
 201   DW_OP_breg11             = 0x7B, // base register 11 + SLEB128 offset
 202   DW_OP_breg12             = 0x7C, // base register 12 + SLEB128 offset
 203   DW_OP_breg13             = 0x7D, // base register 13 + SLEB128 offset
 204   DW_OP_breg14             = 0x7E, // base register 14 + SLEB128 offset
 205   DW_OP_breg15             = 0x7F, // base register 15 + SLEB128 offset
 206   DW_OP_breg16             = 0x80, // base register 16 + SLEB128 offset
 207   DW_OP_breg17             = 0x81, // base register 17 + SLEB128 offset
 208   DW_OP_breg18             = 0x82, // base register 18 + SLEB128 offset
 209   DW_OP_breg19             = 0x83, // base register 19 + SLEB128 offset
 210   DW_OP_breg20             = 0x84, // base register 20 + SLEB128 offset
 211   DW_OP_breg21             = 0x85, // base register 21 + SLEB128 offset
 212   DW_OP_breg22             = 0x86, // base register 22 + SLEB128 offset
 213   DW_OP_breg23             = 0x87, // base register 23 + SLEB128 offset
 214   DW_OP_breg24             = 0x88, // base register 24 + SLEB128 offset
 215   DW_OP_breg25             = 0x89, // base register 25 + SLEB128 offset
 216   DW_OP_breg26             = 0x8A, // base register 26 + SLEB128 offset
 217   DW_OP_breg27             = 0x8B, // base register 27 + SLEB128 offset
 218   DW_OP_breg28             = 0x8C, // base register 28 + SLEB128 offset
 219   DW_OP_breg29             = 0x8D, // base register 29 + SLEB128 offset
 220   DW_OP_breg30             = 0x8E, // base register 30 + SLEB128 offset
 221   DW_OP_breg31             = 0x8F, // base register 31 + SLEB128 offset
 222   DW_OP_regx               = 0x90, // ULEB128 register
 223   DW_OP_fbreg              = 0x91, // SLEB128 offset
 224   DW_OP_bregx              = 0x92, // ULEB128 register followed by SLEB128 offset
 225   DW_OP_piece              = 0x93, // ULEB128 size of piece addressed
 226   DW_OP_deref_size         = 0x94, // 1-byte size of data retrieved
 227   DW_OP_xderef_size        = 0x95, // 1-byte size of data retrieved
 228   DW_OP_nop                = 0x96,
 229   DW_OP_push_object_addres = 0x97,
 230   DW_OP_call2              = 0x98, // 2-byte offset of DIE
 231   DW_OP_call4              = 0x99, // 4-byte offset of DIE
 232   DW_OP_call_ref           = 0x9A, // 4- or 8-byte offset of DIE
 233   DW_OP_lo_user            = 0xE0,
 234   DW_OP_APPLE_uninit       = 0xF0,
 235   DW_OP_hi_user            = 0xFF
 236 };
 237
 238
 239 #endif