gcc/stab.def

   1 /* Table of DBX symbol codes for the GNU system.
   2    Copyright (C) 1988, 1997, 1998, 2004 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 2 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 COPYING.LIB.  If not,
  17    write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  18    Boston, MA 02110-1301, USA.  */
  19
  20 /* This contains contribution from Cygnus Support.  */
  21 \f
  22 /* Global variable.  Only the name is significant.
  23    To find the address, look in the corresponding external symbol.  */
  24 __define_stab (N_GSYM, 0x20, "GSYM")
  25
  26 /* Function name for BSD Fortran.  Only the name is significant.
  27    To find the address, look in the corresponding external symbol.  */
  28 __define_stab (N_FNAME, 0x22, "FNAME")
  29
  30 /* Function name or text-segment variable for C.  Value is its address.
  31    Desc is supposedly starting line number, but GCC doesn't set it
  32    and DBX seems not to miss it.  */
  33 __define_stab (N_FUN, 0x24, "FUN")
  34
  35 /* Data-segment variable with internal linkage.  Value is its address.
  36    "Static Sym".  */
  37 __define_stab (N_STSYM, 0x26, "STSYM")
  38
  39 /* BSS-segment variable with internal linkage.  Value is its address.  */
  40 __define_stab (N_LCSYM, 0x28, "LCSYM")
  41
  42 /* Begin function marker.  */
  43 __define_stab (N_BNSYM, 0x2e, "BNSYM")
  44
  45 /* End function marker.  */
  46 __define_stab (N_ENSYM, 0x4e, "ENSYM")
  47
  48 /* Name of main routine.  Only the name is significant.
  49    This is not used in C.  */
  50 __define_stab (N_MAIN, 0x2a, "MAIN")
  51
  52 /* Global symbol in Pascal.
  53    Supposedly the value is its line number; I'm skeptical.  */
  54 __define_stab (N_PC, 0x30, "PC")
  55
  56 /* Number of symbols:  0, files,,funcs,lines according to Ultrix V4.0.  */
  57 __define_stab (N_NSYMS, 0x32, "NSYMS")
  58
  59 /* "No DST map for sym: name, ,0,type,ignored"  according to Ultrix V4.0.  */
  60 __define_stab (N_NOMAP, 0x34, "NOMAP")
  61
  62 /* New stab from Solaris.  I don't know what it means, but it
  63    don't seem to contain useful information.  */
  64 __define_stab (N_OBJ, 0x38, "OBJ")
  65
  66 /* New stab from Solaris.  I don't know what it means, but it
  67    don't seem to contain useful information.  Possibly related to the
  68    optimization flags used in this module.  */
  69 __define_stab (N_OPT, 0x3c, "OPT")
  70
  71 /* Register variable.  Value is number of register.  */
  72 __define_stab (N_RSYM, 0x40, "RSYM")
  73
  74 /* Modula-2 compilation unit.  Can someone say what info it contains?  */
  75 __define_stab (N_M2C, 0x42, "M2C")
  76
  77 /* Line number in text segment.  Desc is the line number;
  78    value is corresponding address.  */
  79 __define_stab (N_SLINE, 0x44, "SLINE")
  80
  81 /* Similar, for data segment.  */
  82 __define_stab (N_DSLINE, 0x46, "DSLINE")
  83
  84 /* Similar, for bss segment.  */
  85 __define_stab (N_BSLINE, 0x48, "BSLINE")
  86
  87 /* Sun's source-code browser stabs.  ?? Don't know what the fields are.
  88    Supposedly the field is "path to associated .cb file".  THIS VALUE
  89    OVERLAPS WITH N_BSLINE!  */
  90 __define_stab (N_BROWS, 0x48, "BROWS")
  91
  92 /* GNU Modula-2 definition module dependency.  Value is the modification time
  93    of the definition file.  Other is nonzero if it is imported with the
  94    GNU M2 keyword %INITIALIZE.  Perhaps N_M2C can be used if there
  95    are enough empty fields? */
  96 __define_stab(N_DEFD, 0x4a, "DEFD")
  97
  98 /* THE FOLLOWING TWO STAB VALUES CONFLICT.  Happily, one is for Modula-2
  99    and one is for C++.   Still,...  */
 100 /* GNU C++ exception variable.  Name is variable name.  */
 101 __define_stab (N_EHDECL, 0x50, "EHDECL")
 102 /* Modula2 info "for imc":  name,,0,0,0  according to Ultrix V4.0.  */
 103 __define_stab (N_MOD2, 0x50, "MOD2")
 104
 105 /* GNU C++ `catch' clause.  Value is its address.  Desc is nonzero if
 106    this entry is immediately followed by a CAUGHT stab saying what exception
 107    was caught.  Multiple CAUGHT stabs means that multiple exceptions
 108    can be caught here.  If Desc is 0, it means all exceptions are caught
 109    here.  */
 110 __define_stab (N_CATCH, 0x54, "CATCH")
 111
 112 /* Structure or union element.  Value is offset in the structure.  */
 113 __define_stab (N_SSYM, 0x60, "SSYM")
 114
 115 /* Name of main source file.
 116    Value is starting text address of the compilation.  */
 117 __define_stab (N_SO, 0x64, "SO")
 118
 119 /* Automatic variable in the stack.  Value is offset from frame pointer.
 120    Also used for type descriptions.  */
 121 __define_stab (N_LSYM, 0x80, "LSYM")
 122
 123 /* Beginning of an include file.  Only Sun uses this.
 124    In an object file, only the name is significant.
 125    The Sun linker puts data into some of the other fields.  */
 126 __define_stab (N_BINCL, 0x82, "BINCL")
 127
 128 /* Name of sub-source file (#include file).
 129    Value is starting text address of the compilation.  */
 130 __define_stab (N_SOL, 0x84, "SOL")
 131
 132 /* Parameter variable.  Value is offset from argument pointer.
 133    (On most machines the argument pointer is the same as the frame pointer.  */
 134 __define_stab (N_PSYM, 0xa0, "PSYM")
 135
 136 /* End of an include file.  No name.
 137    This and N_BINCL act as brackets around the file's output.
 138    In an object file, there is no significant data in this entry.
 139    The Sun linker puts data into some of the fields.  */
 140 __define_stab (N_EINCL, 0xa2, "EINCL")
 141
 142 /* Alternate entry point.  Value is its address.  */
 143 __define_stab (N_ENTRY, 0xa4, "ENTRY")
 144
 145 /* Beginning of lexical block.
 146    The desc is the nesting level in lexical blocks.
 147    The value is the address of the start of the text for the block.
 148    The variables declared inside the block *precede* the N_LBRAC symbol.  */
 149 __define_stab (N_LBRAC, 0xc0, "LBRAC")
 150
 151 /* Place holder for deleted include file.  Replaces a N_BINCL and everything
 152    up to the corresponding N_EINCL.  The Sun linker generates these when
 153    it finds multiple identical copies of the symbols from an include file.
 154    This appears only in output from the Sun linker.  */
 155 __define_stab (N_EXCL, 0xc2, "EXCL")
 156
 157 /* Modula-2 scope information.  Can someone say what info it contains?  */
 158 __define_stab (N_SCOPE, 0xc4, "SCOPE")
 159
 160 /* End of a lexical block.  Desc matches the N_LBRAC's desc.
 161    The value is the address of the end of the text for the block.  */
 162 __define_stab (N_RBRAC, 0xe0, "RBRAC")
 163
 164 /* Begin named common block.  Only the name is significant.  */
 165 __define_stab (N_BCOMM, 0xe2, "BCOMM")
 166
 167 /* End named common block.  Only the name is significant
 168    (and it should match the N_BCOMM).  */
 169 __define_stab (N_ECOMM, 0xe4, "ECOMM")
 170
 171 /* End common (local name): value is address.
 172    I'm not sure how this is used.  */
 173 __define_stab (N_ECOML, 0xe8, "ECOML")
 174
 175 /* These STAB's are used on Gould systems for Non-Base register symbols
 176    or something like that.  FIXME.  I have assigned the values at random
 177    since I don't have a Gould here.  Fixups from Gould folk welcome...  */
 178 __define_stab (N_NBTEXT, 0xF0, "NBTEXT")
 179 __define_stab (N_NBDATA, 0xF2, "NBDATA")
 180 __define_stab (N_NBBSS,  0xF4, "NBBSS")
 181 __define_stab (N_NBSTS,  0xF6, "NBSTS")
 182 __define_stab (N_NBLCS,  0xF8, "NBLCS")
 183
 184 /* Second symbol entry containing a length-value for the preceding entry.
 185    The value is the length.  */
 186 __define_stab (N_LENG, 0xfe, "LENG")
 187 \f
 188 /* The above information, in matrix format.
 189
 190                         STAB MATRIX
 191         _________________________________________________
 192         | 00 - 1F are not dbx stab symbols              |
 193         | In most cases, the low bit is the EXTernal bit|
 194
 195         | 00 UNDEF  | 02 ABS    | 04 TEXT   | 06 DATA   |
 196         | 01  |EXT  | 03  |EXT  | 05  |EXT  | 07  |EXT  |
 197
 198         | 08 BSS    | 0A INDR   | 0C FN_SEQ | 0E        |
 199         | 09  |EXT  | 0B        | 0D        | 0F        |
 200
 201         | 10        | 12 COMM   | 14 SETA   | 16 SETT   |
 202         | 11        | 13        | 15        | 17        |
 203
 204         | 18 SETD   | 1A SETB   | 1C SETV   | 1E WARNING|
 205         | 19        | 1B        | 1D        | 1F FN     |
 206
 207         |_______________________________________________|
 208         | Debug entries with bit 01 set are unused.     |
 209         | 20 GSYM   | 22 FNAME  | 24 FUN    | 26 STSYM  |
 210         | 28 LCSYM  | 2A MAIN   | 2C        | 2E BNSYM  |
 211         | 30 PC     | 32 NSYMS  | 34 NOMAP  | 36        |
 212         | 38 OBJ    | 3A        | 3C OPT    | 3E        |
 213         | 40 RSYM   | 42 M2C    | 44 SLINE  | 46 DSLINE |
 214         | 48 BSLINE*| 4A DEFD   | 4C        | 4E ENSYM  |
 215         | 50 EHDECL*| 52        | 54 CATCH  | 56        |
 216         | 58        | 5A        | 5C        | 5E        |
 217         | 60 SSYM   | 62        | 64 SO     | 66        |
 218         | 68        | 6A        | 6C        | 6E        |
 219         | 70        | 72        | 74        | 76        |
 220         | 78        | 7A        | 7C        | 7E        |
 221         | 80 LSYM   | 82 BINCL  | 84 SOL    | 86        |
 222         | 88        | 8A        | 8C        | 8E        |
 223         | 90        | 92        | 94        | 96        |
 224         | 98        | 9A        | 9C        | 9E        |
 225         | A0 PSYM   | A2 EINCL  | A4 ENTRY  | A6        |
 226         | A8        | AA        | AC        | AE        |
 227         | B0        | B2        | B4        | B6        |
 228         | B8        | BA        | BC        | BE        |
 229         | C0 LBRAC  | C2 EXCL   | C4 SCOPE  | C6        |
 230         | C8        | CA        | CC        | CE        |
 231         | D0        | D2        | D4        | D6        |
 232         | D8        | DA        | DC        | DE        |
 233         | E0 RBRAC  | E2 BCOMM  | E4 ECOMM  | E6        |
 234         | E8 ECOML  | EA        | EC        | EE        |
 235         | F0        | F2        | F4        | F6        |
 236         | F8        | FA        | FC        | FE LENG   |
 237         +-----------------------------------------------+
 238  * 50 EHDECL is also MOD2.
 239  * 48 BSLINE is also BROWS.
 240  */