gcc/stab.def

   1 /* Table of DBX symbol codes for the GNU system.
   2    Copyright (C) 1988-2017 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Library General Public License as
   7    published by the Free Software Foundation; either version 3 of the
   8    License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Library General Public License for more details.
  14
  15    You should have received a copy of the GNU Library General Public
  16    License along with the GNU C Library; see the file COPYING3.  If
  17    not see <http://www.gnu.org/licenses/>.  */
  18
  19 /* This contains contribution from Cygnus Support.  */
  20 \f
  21 /* Global variable.  Only the name is significant.
  22    To find the address, look in the corresponding external symbol.  */
  23 __define_stab (N_GSYM, 0x20, "GSYM")
  24
  25 /* Function name for BSD Fortran.  Only the name is significant.
  26    To find the address, look in the corresponding external symbol.  */
  27 __define_stab (N_FNAME, 0x22, "FNAME")
  28
  29 /* Function name or text-segment variable for C.  Value is its address.
  30    Desc is supposedly starting line number, but GCC doesn't set it
  31    and DBX seems not to miss it.  */
  32 __define_stab (N_FUN, 0x24, "FUN")
  33
  34 /* Data-segment variable with internal linkage.  Value is its address.
  35    "Static Sym".  */
  36 __define_stab (N_STSYM, 0x26, "STSYM")
  37
  38 /* BSS-segment variable with internal linkage.  Value is its address.  */
  39 __define_stab (N_LCSYM, 0x28, "LCSYM")
  40
  41 /* Begin function marker.  */
  42 __define_stab (N_BNSYM, 0x2e, "BNSYM")
  43
  44 /* End function marker.  */
  45 __define_stab (N_ENSYM, 0x4e, "ENSYM")
  46
  47 /* Name of main routine.  Only the name is significant.
  48    This is not used in C.  */
  49 __define_stab (N_MAIN, 0x2a, "MAIN")
  50
  51 /* Global symbol in Pascal.
  52    Supposedly the value is its line number; I'm skeptical.  */
  53 __define_stab (N_PC, 0x30, "PC")
  54
  55 /* Number of symbols:  0, files,,funcs,lines according to Ultrix V4.0.  */
  56 __define_stab (N_NSYMS, 0x32, "NSYMS")
  57
  58 /* "No DST map for sym: name, ,0,type,ignored"  according to Ultrix V4.0.  */
  59 __define_stab (N_NOMAP, 0x34, "NOMAP")
  60
  61 /* New stab from Solaris.  I don't know what it means, but it
  62    don't seem to contain useful information.  */
  63 __define_stab (N_OBJ, 0x38, "OBJ")
  64
  65 /* New stab from Solaris.  I don't know what it means, but it
  66    don't seem to contain useful information.  Possibly related to the
  67    optimization flags used in this module.  */
  68 __define_stab (N_OPT, 0x3c, "OPT")
  69
  70 /* Register variable.  Value is number of register.  */
  71 __define_stab (N_RSYM, 0x40, "RSYM")
  72
  73 /* Modula-2 compilation unit.  Can someone say what info it contains?  */
  74 __define_stab (N_M2C, 0x42, "M2C")
  75
  76 /* Line number in text segment.  Desc is the line number;
  77    value is corresponding address.  */
  78 __define_stab (N_SLINE, 0x44, "SLINE")
  79
  80 /* Similar, for data segment.  */
  81 __define_stab (N_DSLINE, 0x46, "DSLINE")
  82
  83 /* Similar, for bss segment.  */
  84 __define_stab (N_BSLINE, 0x48, "BSLINE")
  85
  86 /* Sun's source-code browser stabs.  ?? Don't know what the fields are.
  87    Supposedly the field is "path to associated .cb file".  THIS VALUE
  88    OVERLAPS WITH N_BSLINE!  */
  89 __define_stab (N_BROWS, 0x48, "BROWS")
  90
  91 /* GNU Modula-2 definition module dependency.  Value is the modification time
  92    of the definition file.  Other is nonzero if it is imported with the
  93    GNU M2 keyword %INITIALIZE.  Perhaps N_M2C can be used if there
  94    are enough empty fields? */
  95 __define_stab(N_DEFD, 0x4a, "DEFD")
  96
  97 /* THE FOLLOWING TWO STAB VALUES CONFLICT.  Happily, one is for Modula-2
  98    and one is for C++.   Still,...  */
  99 /* GNU C++ exception variable.  Name is variable name.  */
 100 __define_stab (N_EHDECL, 0x50, "EHDECL")
 101 /* Modula2 info "for imc":  name,,0,0,0  according to Ultrix V4.0.  */
 102 __define_stab (N_MOD2, 0x50, "MOD2")
 103
 104 /* GNU C++ `catch' clause.  Value is its address.  Desc is nonzero if
 105    this entry is immediately followed by a CAUGHT stab saying what exception
 106    was caught.  Multiple CAUGHT stabs means that multiple exceptions
 107    can be caught here.  If Desc is 0, it means all exceptions are caught
 108    here.  */
 109 __define_stab (N_CATCH, 0x54, "CATCH")
 110
 111 /* Structure or union element.  Value is offset in the structure.  */
 112 __define_stab (N_SSYM, 0x60, "SSYM")
 113
 114 /* Name of main source file.
 115    Value is starting text address of the compilation.  */
 116 __define_stab (N_SO, 0x64, "SO")
 117
 118 /* Automatic variable in the stack.  Value is offset from frame pointer.
 119    Also used for type descriptions.  */
 120 __define_stab (N_LSYM, 0x80, "LSYM")
 121
 122 /* Beginning of an include file.  Only Sun uses this.
 123    In an object file, only the name is significant.
 124    The Sun linker puts data into some of the other fields.  */
 125 __define_stab (N_BINCL, 0x82, "BINCL")
 126
 127 /* Name of sub-source file (#include file).
 128    Value is starting text address of the compilation.  */
 129 __define_stab (N_SOL, 0x84, "SOL")
 130
 131 /* Parameter variable.  Value is offset from argument pointer.
 132    (On most machines the argument pointer is the same as the frame pointer.  */
 133 __define_stab (N_PSYM, 0xa0, "PSYM")
 134
 135 /* End of an include file.  No name.
 136    This and N_BINCL act as brackets around the file's output.
 137    In an object file, there is no significant data in this entry.
 138    The Sun linker puts data into some of the fields.  */
 139 __define_stab (N_EINCL, 0xa2, "EINCL")
 140
 141 /* Alternate entry point.  Value is its address.  */
 142 __define_stab (N_ENTRY, 0xa4, "ENTRY")
 143
 144 /* Beginning of lexical block.
 145    The desc is the nesting level in lexical blocks.
 146    The value is the address of the start of the text for the block.
 147    The variables declared inside the block *precede* the N_LBRAC symbol.  */
 148 __define_stab (N_LBRAC, 0xc0, "LBRAC")
 149
 150 /* Place holder for deleted include file.  Replaces a N_BINCL and everything
 151    up to the corresponding N_EINCL.  The Sun linker generates these when
 152    it finds multiple identical copies of the symbols from an include file.
 153    This appears only in output from the Sun linker.  */
 154 __define_stab (N_EXCL, 0xc2, "EXCL")
 155
 156 /* Modula-2 scope information.  Can someone say what info it contains?  */
 157 __define_stab (N_SCOPE, 0xc4, "SCOPE")
 158
 159 /* End of a lexical block.  Desc matches the N_LBRAC's desc.
 160    The value is the address of the end of the text for the block.  */
 161 __define_stab (N_RBRAC, 0xe0, "RBRAC")
 162
 163 /* Begin named common block.  Only the name is significant.  */
 164 __define_stab (N_BCOMM, 0xe2, "BCOMM")
 165
 166 /* End named common block.  Only the name is significant
 167    (and it should match the N_BCOMM).  */
 168 __define_stab (N_ECOMM, 0xe4, "ECOMM")
 169
 170 /* End common (local name): value is address.
 171    I'm not sure how this is used.  */
 172 __define_stab (N_ECOML, 0xe8, "ECOML")
 173
 174 /* These STAB's are used on Gould systems for Non-Base register symbols
 175    or something like that.  FIXME.  I have assigned the values at random
 176    since I don't have a Gould here.  Fixups from Gould folk welcome...  */
 177 __define_stab (N_NBTEXT, 0xF0, "NBTEXT")
 178 __define_stab (N_NBDATA, 0xF2, "NBDATA")
 179 __define_stab (N_NBBSS,  0xF4, "NBBSS")
 180 __define_stab (N_NBSTS,  0xF6, "NBSTS")
 181 __define_stab (N_NBLCS,  0xF8, "NBLCS")
 182
 183 /* Second symbol entry containing a length-value for the preceding entry.
 184    The value is the length.  */
 185 __define_stab (N_LENG, 0xfe, "LENG")
 186 \f
 187 /* The above information, in matrix format.
 188
 189                         STAB MATRIX
 190         _________________________________________________
 191         | 00 - 1F are not dbx stab symbols              |
 192         | In most cases, the low bit is the EXTernal bit|
 193
 194         | 00 UNDEF  | 02 ABS    | 04 TEXT   | 06 DATA   |
 195         | 01  |EXT  | 03  |EXT  | 05  |EXT  | 07  |EXT  |
 196
 197         | 08 BSS    | 0A INDR   | 0C FN_SEQ | 0E        |
 198         | 09  |EXT  | 0B        | 0D        | 0F        |
 199
 200         | 10        | 12 COMM   | 14 SETA   | 16 SETT   |
 201         | 11        | 13        | 15        | 17        |
 202
 203         | 18 SETD   | 1A SETB   | 1C SETV   | 1E WARNING|
 204         | 19        | 1B        | 1D        | 1F FN     |
 205
 206         |_______________________________________________|
 207         | Debug entries with bit 01 set are unused.     |
 208         | 20 GSYM   | 22 FNAME  | 24 FUN    | 26 STSYM  |
 209         | 28 LCSYM  | 2A MAIN   | 2C        | 2E BNSYM  |
 210         | 30 PC     | 32 NSYMS  | 34 NOMAP  | 36        |
 211         | 38 OBJ    | 3A        | 3C OPT    | 3E        |
 212         | 40 RSYM   | 42 M2C    | 44 SLINE  | 46 DSLINE |
 213         | 48 BSLINE*| 4A DEFD   | 4C        | 4E ENSYM  |
 214         | 50 EHDECL*| 52        | 54 CATCH  | 56        |
 215         | 58        | 5A        | 5C        | 5E        |
 216         | 60 SSYM   | 62        | 64 SO     | 66        |
 217         | 68        | 6A        | 6C        | 6E        |
 218         | 70        | 72        | 74        | 76        |
 219         | 78        | 7A        | 7C        | 7E        |
 220         | 80 LSYM   | 82 BINCL  | 84 SOL    | 86        |
 221         | 88        | 8A        | 8C        | 8E        |
 222         | 90        | 92        | 94        | 96        |
 223         | 98        | 9A        | 9C        | 9E        |
 224         | A0 PSYM   | A2 EINCL  | A4 ENTRY  | A6        |
 225         | A8        | AA        | AC        | AE        |
 226         | B0        | B2        | B4        | B6        |
 227         | B8        | BA        | BC        | BE        |
 228         | C0 LBRAC  | C2 EXCL   | C4 SCOPE  | C6        |
 229         | C8        | CA        | CC        | CE        |
 230         | D0        | D2        | D4        | D6        |
 231         | D8        | DA        | DC        | DE        |
 232         | E0 RBRAC  | E2 BCOMM  | E4 ECOMM  | E6        |
 233         | E8 ECOML  | EA        | EC        | EE        |
 234         | F0        | F2        | F4        | F6        |
 235         | F8        | FA        | FC        | FE LENG   |
 236         +-----------------------------------------------+
 237  * 50 EHDECL is also MOD2.
 238  * 48 BSLINE is also BROWS.
 239  */