gcc/stab.def

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