misc/bits/stab.def

   1 /* Table of DBX symbol codes for the GNU system.
   2    Copyright (C) 1988, 1997 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 Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the 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    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 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 /* Name of main routine.  Only the name is significant.
  43    This is not used in C.  */
  44 __define_stab (N_MAIN, 0x2a, "MAIN")
  45
  46 /* Global symbol in Pascal.
  47    Supposedly the value is its line number; I'm skeptical.  */
  48 __define_stab (N_PC, 0x30, "PC")
  49
  50 /* Number of symbols:  0, files,,funcs,lines according to Ultrix V4.0. */
  51 __define_stab (N_NSYMS, 0x32, "NSYMS")
  52
  53 /* "No DST map for sym: name, ,0,type,ignored"  according to Ultrix V4.0. */
  54 __define_stab (N_NOMAP, 0x34, "NOMAP")
  55
  56 /* New stab from Solaris.  I don't know what it means, but it
  57    don't seem to contain useful information.  */
  58 __define_stab (N_OBJ, 0x38, "OBJ")
  59
  60 /* New stab from Solaris.  I don't know what it means, but it
  61    don't seem to contain useful information.  Possibly related to the
  62    optimization flags used in this module.  */
  63 __define_stab (N_OPT, 0x3c, "OPT")
  64
  65 /* Register variable.  Value is number of register.  */
  66 __define_stab (N_RSYM, 0x40, "RSYM")
  67
  68 /* Modula-2 compilation unit.  Can someone say what info it contains?  */
  69 __define_stab (N_M2C, 0x42, "M2C")
  70
  71 /* Line number in text segment.  Desc is the line number;
  72    value is corresponding address.  */
  73 __define_stab (N_SLINE, 0x44, "SLINE")
  74
  75 /* Similar, for data segment.  */
  76 __define_stab (N_DSLINE, 0x46, "DSLINE")
  77
  78 /* Similar, for bss segment.  */
  79 __define_stab (N_BSLINE, 0x48, "BSLINE")
  80
  81 /* Sun's source-code browser stabs.  ?? Don't know what the fields are.
  82    Supposedly the field is "path to associated .cb file".  THIS VALUE
  83    OVERLAPS WITH N_BSLINE!  */
  84 __define_stab (N_BROWS, 0x48, "BROWS")
  85
  86 /* GNU Modula-2 definition module dependency.  Value is the modification time
  87    of the definition file.  Other is non-zero if it is imported with the
  88    GNU M2 keyword %INITIALIZE.  Perhaps N_M2C can be used if there
  89    are enough empty fields? */
  90 __define_stab(N_DEFD, 0x4a, "DEFD")
  91
  92 /* THE FOLLOWING TWO STAB VALUES CONFLICT.  Happily, one is for Modula-2
  93    and one is for C++.   Still,... */
  94 /* GNU C++ exception variable.  Name is variable name.  */
  95 __define_stab (N_EHDECL, 0x50, "EHDECL")
  96 /* Modula2 info "for imc":  name,,0,0,0  according to Ultrix V4.0.  */
  97 __define_stab (N_MOD2, 0x50, "MOD2")
  98
  99 /* GNU C++ `catch' clause.  Value is its address.  Desc is nonzero if
 100    this entry is immediately followed by a CAUGHT stab saying what exception
 101    was caught.  Multiple CAUGHT stabs means that multiple exceptions
 102    can be caught here.  If Desc is 0, it means all exceptions are caught
 103    here.  */
 104 __define_stab (N_CATCH, 0x54, "CATCH")
 105
 106 /* Structure or union element.  Value is offset in the structure.  */
 107 __define_stab (N_SSYM, 0x60, "SSYM")
 108
 109 /* Name of main source file.
 110    Value is starting text address of the compilation.  */
 111 __define_stab (N_SO, 0x64, "SO")
 112
 113 /* Automatic variable in the stack.  Value is offset from frame pointer.
 114    Also used for type descriptions.  */
 115 __define_stab (N_LSYM, 0x80, "LSYM")
 116
 117 /* Beginning of an include file.  Only Sun uses this.
 118    In an object file, only the name is significant.
 119    The Sun linker puts data into some of the other fields.  */
 120 __define_stab (N_BINCL, 0x82, "BINCL")
 121
 122 /* Name of sub-source file (#include file).
 123    Value is starting text address of the compilation.  */
 124 __define_stab (N_SOL, 0x84, "SOL")
 125
 126 /* Parameter variable.  Value is offset from argument pointer.
 127    (On most machines the argument pointer is the same as the frame pointer.  */
 128 __define_stab (N_PSYM, 0xa0, "PSYM")
 129
 130 /* End of an include file.  No name.
 131    This and N_BINCL act as brackets around the file's output.
 132    In an object file, there is no significant data in this entry.
 133    The Sun linker puts data into some of the fields.  */
 134 __define_stab (N_EINCL, 0xa2, "EINCL")
 135
 136 /* Alternate entry point.  Value is its address.  */
 137 __define_stab (N_ENTRY, 0xa4, "ENTRY")
 138
 139 /* Beginning of lexical block.
 140    The desc is the nesting level in lexical blocks.
 141    The value is the address of the start of the text for the block.
 142    The variables declared inside the block *precede* the N_LBRAC symbol.  */
 143 __define_stab (N_LBRAC, 0xc0, "LBRAC")
 144
 145 /* Place holder for deleted include file.  Replaces a N_BINCL and everything
 146    up to the corresponding N_EINCL.  The Sun linker generates these when
 147    it finds multiple identical copies of the symbols from an include file.
 148    This appears only in output from the Sun linker.  */
 149 __define_stab (N_EXCL, 0xc2, "EXCL")
 150
 151 /* Modula-2 scope information.  Can someone say what info it contains?  */
 152 __define_stab (N_SCOPE, 0xc4, "SCOPE")
 153
 154 /* End of a lexical block.  Desc matches the N_LBRAC's desc.
 155    The value is the address of the end of the text for the block.  */
 156 __define_stab (N_RBRAC, 0xe0, "RBRAC")
 157
 158 /* Begin named common block.  Only the name is significant.  */
 159 __define_stab (N_BCOMM, 0xe2, "BCOMM")
 160
 161 /* End named common block.  Only the name is significant
 162    (and it should match the N_BCOMM).  */
 163 __define_stab (N_ECOMM, 0xe4, "ECOMM")
 164
 165 /* End common (local name): value is address.
 166    I'm not sure how this is used.  */
 167 __define_stab (N_ECOML, 0xe8, "ECOML")
 168
 169 /* These STAB's are used on Gould systems for Non-Base register symbols
 170    or something like that.  FIXME.  I have assigned the values at random
 171    since I don't have a Gould here.  Fixups from Gould folk welcome... */
 172 __define_stab (N_NBTEXT, 0xF0, "NBTEXT")
 173 __define_stab (N_NBDATA, 0xF2, "NBDATA")
 174 __define_stab (N_NBBSS,  0xF4, "NBBSS")
 175 __define_stab (N_NBSTS,  0xF6, "NBSTS")
 176 __define_stab (N_NBLCS,  0xF8, "NBLCS")
 177
 178 /* Second symbol entry containing a length-value for the preceding entry.
 179    The value is the length.  */
 180 __define_stab (N_LENG, 0xfe, "LENG")
 181 \f
 182 /* The above information, in matrix format.
 183
 184                         STAB MATRIX
 185         _________________________________________________
 186         | 00 - 1F are not dbx stab symbols              |
 187         | In most cases, the low bit is the EXTernal bit|
 188
 189         | 00 UNDEF  | 02 ABS    | 04 TEXT   | 06 DATA   |
 190         | 01  |EXT  | 03  |EXT  | 05  |EXT  | 07  |EXT  |
 191
 192         | 08 BSS    | 0A INDR   | 0C FN_SEQ | 0E        |
 193         | 09  |EXT  | 0B        | 0D        | 0F        |
 194
 195         | 10        | 12 COMM   | 14 SETA   | 16 SETT   |
 196         | 11        | 13        | 15        | 17        |
 197
 198         | 18 SETD   | 1A SETB   | 1C SETV   | 1E WARNING|
 199         | 19        | 1B        | 1D        | 1F FN     |
 200
 201         |_______________________________________________|
 202         | Debug entries with bit 01 set are unused.     |
 203         | 20 GSYM   | 22 FNAME  | 24 FUN    | 26 STSYM  |
 204         | 28 LCSYM  | 2A MAIN   | 2C        | 2E        |
 205         | 30 PC     | 32 NSYMS  | 34 NOMAP  | 36        |
 206         | 38 OBJ    | 3A        | 3C OPT    | 3E        |
 207         | 40 RSYM   | 42 M2C    | 44 SLINE  | 46 DSLINE |
 208         | 48 BSLINE*| 4A DEFD   | 4C        | 4E        |
 209         | 50 EHDECL*| 52        | 54 CATCH  | 56        |
 210         | 58        | 5A        | 5C        | 5E        |
 211         | 60 SSYM   | 62        | 64 SO     | 66        |
 212         | 68        | 6A        | 6C        | 6E        |
 213         | 70        | 72        | 74        | 76        |
 214         | 78        | 7A        | 7C        | 7E        |
 215         | 80 LSYM   | 82 BINCL  | 84 SOL    | 86        |
 216         | 88        | 8A        | 8C        | 8E        |
 217         | 90        | 92        | 94        | 96        |
 218         | 98        | 9A        | 9C        | 9E        |
 219         | A0 PSYM   | A2 EINCL  | A4 ENTRY  | A6        |
 220         | A8        | AA        | AC        | AE        |
 221         | B0        | B2        | B4        | B6        |
 222         | B8        | BA        | BC        | BE        |
 223         | C0 LBRAC  | C2 EXCL   | C4 SCOPE  | C6        |
 224         | C8        | CA        | CC        | CE        |
 225         | D0        | D2        | D4        | D6        |
 226         | D8        | DA        | DC        | DE        |
 227         | E0 RBRAC  | E2 BCOMM  | E4 ECOMM  | E6        |
 228         | E8 ECOML  | EA        | EC        | EE        |
 229         | F0        | F2        | F4        | F6        |
 230         | F8        | FA        | FC        | FE LENG   |
 231         +-----------------------------------------------+
 232  * 50 EHDECL is also MOD2.
 233  * 48 BSLINE is also BROWS.
 234  */