include/stab.def

   1 /* Table of DBX symbol codes for the GNU system.
   2    Copyright (C) 1988, 1991 Free Software Foundation, Inc.
   3
   4 This program is free software; you can redistribute it and/or modify
   5 it under the terms of the GNU General Public License as published by
   6 the Free Software Foundation; either version 2 of the License, or
   7 (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 GNU General Public License for more details.
  13
  14 You should have received a copy of the GNU General Public License
  15 along with this program; if not, write to the Free Software
  16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  17 \f
  18 /* Global variable.  Only the name is significant.
  19    To find the address, look in the corresponding external symbol.  */
  20 __define_stab (N_GSYM, 0x20, "GSYM")
  21
  22 /* Function name for BSD Fortran.  Only the name is significant.
  23    To find the address, look in the corresponding external symbol.  */
  24 __define_stab (N_FNAME, 0x22, "FNAME")
  25
  26 /* Function name or text-segment variable for C.  Value is its address.
  27    Desc is supposedly starting line number, but GCC doesn't set it
  28    and DBX seems not to miss it.  */
  29 __define_stab (N_FUN, 0x24, "FUN")
  30
  31 /* Data-segment variable with internal linkage.  Value is its address.
  32    "Static Sym".  */
  33 __define_stab (N_STSYM, 0x26, "STSYM")
  34
  35 /* BSS-segment variable with internal linkage.  Value is its address.  */
  36 __define_stab (N_LCSYM, 0x28, "LCSYM")
  37
  38 /* Name of main routine.  Only the name is significant.
  39    This is not used in C.  */
  40 __define_stab (N_MAIN, 0x2a, "MAIN")
  41
  42 /* Global symbol in Pascal.
  43    Supposedly the value is its line number; I'm skeptical.  */
  44 __define_stab (N_PC, 0x30, "PC")
  45
  46 /* Number of symbols:  0, files,,funcs,lines according to Ultrix V4.0. */
  47 __define_stab (N_NSYMS, 0x32, "NSYMS")
  48
  49 /* "No DST map for sym: name, ,0,type,ignored"  according to Ultrix V4.0. */
  50 __define_stab (N_NOMAP, 0x34, "NOMAP")
  51
  52 /* Register variable.  Value is number of register.  */
  53 __define_stab (N_RSYM, 0x40, "RSYM")
  54
  55 /* Modula-2 compilation unit.  Can someone say what info it contains?  */
  56 __define_stab (N_M2C, 0x42, "M2C")
  57
  58 /* Line number in text segment.  Desc is the line number;
  59    value is corresponding address.  */
  60 __define_stab (N_SLINE, 0x44, "SLINE")
  61
  62 /* Similar, for data segment.  */
  63 __define_stab (N_DSLINE, 0x46, "DSLINE")
  64
  65 /* Similar, for bss segment.  */
  66 __define_stab (N_BSLINE, 0x48, "BSLINE")
  67
  68 /* Sun's source-code browser stabs.  ?? Don't know what the fields are.
  69    Supposedly the field is "path to associated .cb file".  THIS VALUE
  70    OVERLAPS WITH N_BSLINE!  */
  71 __define_stab (N_BROWS, 0x48, "BROWS")
  72
  73 /* GNU Modula-2 definition module dependency.  Value is the modification time
  74    of the definition file.  Other is non-zero if it is imported with the
  75    GNU M2 keyword %INITIALIZE.  Perhaps N_M2C can be used if there
  76    are enough empty fields? */
  77 __define_stab(N_DEFD, 0x4a, "DEFD")
  78
  79 /* THE FOLLOWING TWO STAB VALUES CONFLICT.  Happily, one is for Modula-2
  80    and one is for C++.   Still,... */
  81 /* GNU C++ exception variable.  Name is variable name.  */
  82 __define_stab (N_EHDECL, 0x50, "EHDECL")
  83 /* Modula2 info "for imc":  name,,0,0,0  according to Ultrix V4.0.  */
  84 __define_stab (N_MOD2, 0x50, "MOD2")
  85
  86 /* GNU C++ `catch' clause.  Value is its address.  Desc is nonzero if
  87    this entry is immediately followed by a CAUGHT stab saying what exception
  88    was caught.  Multiple CAUGHT stabs means that multiple exceptions
  89    can be caught here.  If Desc is 0, it means all exceptions are caught
  90    here.  */
  91 __define_stab (N_CATCH, 0x54, "CATCH")
  92
  93 /* Structure or union element.  Value is offset in the structure.  */
  94 __define_stab (N_SSYM, 0x60, "SSYM")
  95
  96 /* Name of main source file.
  97    Value is starting text address of the compilation.  */
  98 __define_stab (N_SO, 0x64, "SO")
  99
 100 /* Automatic variable in the stack.  Value is offset from frame pointer.
 101    Also used for type descriptions.  */
 102 __define_stab (N_LSYM, 0x80, "LSYM")
 103
 104 /* Beginning of an include file.  Only Sun uses this.
 105    In an object file, only the name is significant.
 106    The Sun linker puts data into some of the other fields.  */
 107 __define_stab (N_BINCL, 0x82, "BINCL")
 108
 109 /* Name of sub-source file (#include file).
 110    Value is starting text address of the compilation.  */
 111 __define_stab (N_SOL, 0x84, "SOL")
 112
 113 /* Parameter variable.  Value is offset from argument pointer.
 114    (On most machines the argument pointer is the same as the frame pointer.  */
 115 __define_stab (N_PSYM, 0xa0, "PSYM")
 116
 117 /* End of an include file.  No name.
 118    This and N_BINCL act as brackets around the file's output.
 119    In an object file, there is no significant data in this entry.
 120    The Sun linker puts data into some of the fields.  */
 121 __define_stab (N_EINCL, 0xa2, "EINCL")
 122
 123 /* Alternate entry point.  Value is its address.  */
 124 __define_stab (N_ENTRY, 0xa4, "ENTRY")
 125
 126 /* Beginning of lexical block.
 127    The desc is the nesting level in lexical blocks.
 128    The value is the address of the start of the text for the block.
 129    The variables declared inside the block *precede* the N_LBRAC symbol.  */
 130 __define_stab (N_LBRAC, 0xc0, "LBRAC")
 131
 132 /* Place holder for deleted include file.  Replaces a N_BINCL and everything
 133    up to the corresponding N_EINCL.  The Sun linker generates these when
 134    it finds multiple identical copies of the symbols from an include file.
 135    This appears only in output from the Sun linker.  */
 136 __define_stab (N_EXCL, 0xc2, "EXCL")
 137
 138 /* Modula-2 scope information.  Can someone say what info it contains?  */
 139 __define_stab (N_SCOPE, 0xc4, "SCOPE")
 140
 141 /* End of a lexical block.  Desc matches the N_LBRAC's desc.
 142    The value is the address of the end of the text for the block.  */
 143 __define_stab (N_RBRAC, 0xe0, "RBRAC")
 144
 145 /* Begin named common block.  Only the name is significant.  */
 146 __define_stab (N_BCOMM, 0xe2, "BCOMM")
 147
 148 /* End named common block.  Only the name is significant
 149    (and it should match the N_BCOMM).  */
 150 __define_stab (N_ECOMM, 0xe4, "ECOMM")
 151
 152 /* End common (local name): value is address.
 153    I'm not sure how this is used.  */
 154 __define_stab (N_ECOML, 0xe8, "ECOML")
 155
 156 /* These STAB's are used on Gould systems for Non-Base register symbols
 157    or something like that.  FIXME.  I have assigned the values at random
 158    since I don't have a Gould here.  Fixups from Gould folk welcome... */
 159 __define_stab (N_NBTEXT, 0xF0, "NBTEXT")
 160 __define_stab (N_NBDATA, 0xF2, "NBDATA")
 161 __define_stab (N_NBBSS,  0xF4, "NBBSS")
 162 __define_stab (N_NBSTS,  0xF6, "NBSTS")
 163 __define_stab (N_NBLCS,  0xF8, "NBLCS")
 164
 165 /* Second symbol entry containing a length-value for the preceding entry.
 166    The value is the length.  */
 167 __define_stab (N_LENG, 0xfe, "LENG")
 168 \f
 169 /* The above information, in matrix format.
 170
 171                         STAB MATRIX
 172         _________________________________________________
 173         | 00 - 1F are not dbx stab symbols              |
 174         | In most cases, the low bit is the EXTernal bit|
 175
 176         | 00 UNDEF  | 02 ABS    | 04 TEXT   | 06 DATA   |
 177         | 01  |EXT  | 03  |EXT  | 05  |EXT  | 07  |EXT  |
 178
 179         | 08 BSS    | 0A INDR   | 0C        | 0E        |
 180         | 09  |EXT  | 0B        | 0D        | 0F        |
 181
 182         | 10        | 12 COMM   | 14 SETA   | 16 SETT   |
 183         | 11        | 13        | 15        | 17        |
 184
 185         | 18 SETD   | 1A SETB   | 1C SETV   | 1E WARNING|
 186         | 19        | 1B        | 1D        | 1F FN     |
 187
 188         |_______________________________________________|
 189         | Debug entries with bit 01 set are unused.     |
 190         | 20 GSYM   | 22 FNAME  | 24 FUN    | 26 STSYM  |
 191         | 28 LCSYM  | 2A MAIN   | 2C        | 2E        |
 192         | 30 PC     | 32 NSYMS  | 34 NOMAP  | 36        |
 193         | 38        | 3A        | 3C        | 3E        |
 194         | 40 RSYM   | 42 M2C    | 44 SLINE  | 46 DSLINE |
 195         | 48 BSLINE*| 4A DEFD   | 4C        | 4E        |
 196         | 50 EHDECL*| 52        | 54 CATCH  | 56        |
 197         | 58        | 5A        | 5C        | 5E        |
 198         | 60 SSYM   | 62        | 64 SO     | 66        |
 199         | 68        | 6A        | 6C        | 6E        |
 200         | 70        | 72        | 74        | 76        |
 201         | 78        | 7A        | 7C        | 7E        |
 202         | 80 LSYM   | 82 BINCL  | 84 SOL    | 86        |
 203         | 88        | 8A        | 8C        | 8E        |
 204         | 90        | 92        | 94        | 96        |
 205         | 98        | 9A        | 9C        | 9E        |
 206         | A0 PSYM   | A2 EINCL  | A4 ENTRY  | A6        |
 207         | A8        | AA        | AC        | AE        |
 208         | B0        | B2        | B4        | B6        |
 209         | B8        | BA        | BC        | BE        |
 210         | C0 LBRAC  | C2 EXCL   | C4 SCOPE  | C6        |
 211         | C8        | CA        | CC        | CE        |
 212         | D0        | D2        | D4        | D6        |
 213         | D8        | DA        | DC        | DE        |
 214         | E0 RBRAC  | E2 BCOMM  | E4 ECOMM  | E6        |
 215         | E8 ECOML  | EA        | EC        | EE        |
 216         | F0        | F2        | F4        | F6        |
 217         | F8        | FA        | FC        | FE LENG   |
 218         +-----------------------------------------------+
 219  * 50 EHDECL is also MOD2.
 220  * 48 BSLINE is also BROWS.
 221  */