include/aout/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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  17 \f
  18 /* New stab from Solaris 2.  This uses an n_type of 0, which in a.out files
  19    overlaps the N_UNDF used for ordinary symbols.  In ELF files, the
  20    debug information is in a different file section, so there is no conflict.
  21    This symbol's n_value gives the size of the string section associated
  22    with this file.  The symbol's n_strx (relative to the just-updated
  23    string section start address) gives the name of the source file,
  24    e.g. "foo.c", without any path information.  The symbol's n_desc gives
  25    the count of upcoming symbols associated with this file (not including
  26    this one).  */
  27 /* __define_stab (N_UNDF, 0x00, "UNDF")  */
  28
  29 /* Global variable.  Only the name is significant.
  30    To find the address, look in the corresponding external symbol.  */
  31 __define_stab (N_GSYM, 0x20, "GSYM")
  32
  33 /* Function name for BSD Fortran.  Only the name is significant.
  34    To find the address, look in the corresponding external symbol.  */
  35 __define_stab (N_FNAME, 0x22, "FNAME")
  36
  37 /* Function name or text-segment variable for C.  Value is its address.
  38    Desc is supposedly starting line number, but GCC doesn't set it
  39    and DBX seems not to miss it.  */
  40 __define_stab (N_FUN, 0x24, "FUN")
  41
  42 /* Data-segment variable with internal linkage.  Value is its address.
  43    "Static Sym".  */
  44 __define_stab (N_STSYM, 0x26, "STSYM")
  45
  46 /* BSS-segment variable with internal linkage.  Value is its address.  */
  47 __define_stab (N_LCSYM, 0x28, "LCSYM")
  48
  49 /* Name of main routine.  Only the name is significant.  */
  50 __define_stab (N_MAIN, 0x2a, "MAIN")
  51
  52 /* Solaris2:  Read-only data symbols.  */
  53 __define_stab (N_ROSYM, 0x2c, "ROSYM")
  54
  55 /* Global symbol in Pascal.
  56    Supposedly the value is its line number; I'm skeptical.  */
  57 __define_stab (N_PC, 0x30, "PC")
  58
  59 /* Number of symbols:  0, files,,funcs,lines according to Ultrix V4.0. */
  60 __define_stab (N_NSYMS, 0x32, "NSYMS")
  61
  62 /* "No DST map for sym: name, ,0,type,ignored"  according to Ultrix V4.0. */
  63 __define_stab (N_NOMAP, 0x34, "NOMAP")
  64
  65 /* New stab from Solaris 2.  Like N_SO, but for the object file.  Two in
  66    a row provide the build directory and the relative path of the .o from it.
  67    Solaris2 uses this to avoid putting the stabs info into the linked
  68    executable; this stab goes into the ".stab.index" section, and the debugger
  69    reads the real stabs directly from the .o files instead.  */
  70 __define_stab (N_OBJ, 0x38, "OBJ")
  71
  72 /* New stab from Solaris 2.  Options for the debugger, related to the
  73    source language for this module.  E.g. whether to use ANSI
  74    integral promotions or traditional integral promotions.  */
  75 __define_stab (N_OPT, 0x3c, "OPT")
  76
  77 /* Register variable.  Value is number of register.  */
  78 __define_stab (N_RSYM, 0x40, "RSYM")
  79
  80 /* Modula-2 compilation unit.  Can someone say what info it contains?  */
  81 __define_stab (N_M2C, 0x42, "M2C")
  82
  83 /* Line number in text segment.  Desc is the line number;
  84    value is corresponding address.  On Solaris2, the line number is
  85    relative to the start of the current function.  */
  86 __define_stab (N_SLINE, 0x44, "SLINE")
  87
  88 /* Similar, for data segment.  */
  89 __define_stab (N_DSLINE, 0x46, "DSLINE")
  90
  91 /* Similar, for bss segment.  */
  92 __define_stab (N_BSLINE, 0x48, "BSLINE")
  93
  94 /* Sun's source-code browser stabs.  ?? Don't know what the fields are.
  95    Supposedly the field is "path to associated .cb file".  THIS VALUE
  96    OVERLAPS WITH N_BSLINE!  */
  97 __define_stab_duplicate (N_BROWS, 0x48, "BROWS")
  98
  99 /* GNU Modula-2 definition module dependency.  Value is the modification time
 100    of the definition file.  Other is non-zero if it is imported with the
 101    GNU M2 keyword %INITIALIZE.  Perhaps N_M2C can be used if there
 102    are enough empty fields? */
 103 __define_stab(N_DEFD, 0x4a, "DEFD")
 104
 105 /* New in Solaris2.  Function start/body/end line numbers.  */
 106 __define_stab(N_FLINE, 0x4C, "FLINE")
 107
 108 /* THE FOLLOWING TWO STAB VALUES CONFLICT.  Happily, one is for Modula-2
 109    and one is for C++.   Still,... */
 110 /* GNU C++ exception variable.  Name is variable name.  */
 111 __define_stab (N_EHDECL, 0x50, "EHDECL")
 112 /* Modula2 info "for imc":  name,,0,0,0  according to Ultrix V4.0.  */
 113 __define_stab_duplicate (N_MOD2, 0x50, "MOD2")
 114
 115 /* GNU C++ `catch' clause.  Value is its address.  Desc is nonzero if
 116    this entry is immediately followed by a CAUGHT stab saying what exception
 117    was caught.  Multiple CAUGHT stabs means that multiple exceptions
 118    can be caught here.  If Desc is 0, it means all exceptions are caught
 119    here.  */
 120 __define_stab (N_CATCH, 0x54, "CATCH")
 121
 122 /* Structure or union element.  Value is offset in the structure.  */
 123 __define_stab (N_SSYM, 0x60, "SSYM")
 124
 125 /* Solaris2:  Last stab emitted for module.  */
 126 __define_stab (N_ENDM, 0x62, "ENDM")
 127
 128 /* Name of main source file.
 129    Value is starting text address of the compilation.
 130    If multiple N_SO's appear, the first to contain a trailing / is the
 131    compilation directory.  The first to not contain a trailing / is the
 132    source file name, relative to the compilation directory.  Others (perhaps
 133    resulting from cfront) are ignored.
 134    On Solaris2, value is undefined, but desc is a source-language code.  */
 135
 136 __define_stab (N_SO, 0x64, "SO")
 137
 138 /* Automatic variable in the stack.  Value is offset from frame pointer.
 139    Also used for type descriptions.  */
 140 __define_stab (N_LSYM, 0x80, "LSYM")
 141
 142 /* Beginning of an include file.  Only Sun uses this.
 143    In an object file, only the name is significant.
 144    The Sun linker puts data into some of the other fields.  */
 145 __define_stab (N_BINCL, 0x82, "BINCL")
 146
 147 /* Name of sub-source file (#include file).
 148    Value is starting text address of the compilation.  */
 149 __define_stab (N_SOL, 0x84, "SOL")
 150
 151 /* Parameter variable.  Value is offset from argument pointer.
 152    (On most machines the argument pointer is the same as the frame pointer.  */
 153 __define_stab (N_PSYM, 0xa0, "PSYM")
 154
 155 /* End of an include file.  No name.
 156    This and N_BINCL act as brackets around the file's output.
 157    In an object file, there is no significant data in this entry.
 158    The Sun linker puts data into some of the fields.  */
 159 __define_stab (N_EINCL, 0xa2, "EINCL")
 160
 161 /* Alternate entry point.  Value is its address.  */
 162 __define_stab (N_ENTRY, 0xa4, "ENTRY")
 163
 164 /* Beginning of lexical block.
 165    The desc is the nesting level in lexical blocks.
 166    The value is the address of the start of the text for the block.
 167    The variables declared inside the block *precede* the N_LBRAC symbol.
 168    On Solaris2, the value is relative to the start of the current function.  */
 169 __define_stab (N_LBRAC, 0xc0, "LBRAC")
 170
 171 /* Place holder for deleted include file.  Replaces a N_BINCL and everything
 172    up to the corresponding N_EINCL.  The Sun linker generates these when
 173    it finds multiple identical copies of the symbols from an include file.
 174    This appears only in output from the Sun linker.  */
 175 __define_stab (N_EXCL, 0xc2, "EXCL")
 176
 177 /* Modula-2 scope information.  Can someone say what info it contains?  */
 178 __define_stab (N_SCOPE, 0xc4, "SCOPE")
 179
 180 /* End of a lexical block.  Desc matches the N_LBRAC's desc.
 181    The value is the address of the end of the text for the block.
 182    On Solaris2, the value is relative to the start of the current function.  */
 183 __define_stab (N_RBRAC, 0xe0, "RBRAC")
 184
 185 /* Begin named common block.  Only the name is significant.  */
 186 __define_stab (N_BCOMM, 0xe2, "BCOMM")
 187
 188 /* End named common block.  Only the name is significant
 189    (and it should match the N_BCOMM).  */
 190 __define_stab (N_ECOMM, 0xe4, "ECOMM")
 191
 192 /* Member of a common block; value is offset within the common block.
 193    This should occur within a BCOMM/ECOMM pair.  */
 194 __define_stab (N_ECOML, 0xe8, "ECOML")
 195
 196 /* Solaris2: Pascal "with" statement: type,,0,0,offset */
 197 __define_stab (N_WITH, 0xea, "WITH")
 198
 199 /* These STAB's are used on Gould systems for Non-Base register symbols
 200    or something like that.  FIXME.  I have assigned the values at random
 201    since I don't have a Gould here.  Fixups from Gould folk welcome... */
 202 __define_stab (N_NBTEXT, 0xF0, "NBTEXT")
 203 __define_stab (N_NBDATA, 0xF2, "NBDATA")
 204 __define_stab (N_NBBSS,  0xF4, "NBBSS")
 205 __define_stab (N_NBSTS,  0xF6, "NBSTS")
 206 __define_stab (N_NBLCS,  0xF8, "NBLCS")
 207
 208 /* Second symbol entry containing a length-value for the preceding entry.
 209    The value is the length.  */
 210 __define_stab (N_LENG, 0xfe, "LENG")
 211 \f
 212 /* The above information, in matrix format.
 213
 214                         STAB MATRIX
 215         _________________________________________________
 216         | 00 - 1F are not dbx stab symbols              |
 217         | In most cases, the low bit is the EXTernal bit|
 218
 219         | 00 UNDEF  | 02 ABS    | 04 TEXT   | 06 DATA   |
 220         | 01  |EXT  | 03  |EXT  | 05  |EXT  | 07  |EXT  |
 221
 222         | 08 BSS    | 0A INDR   | 0C FN_SEQ | 0E WEAKA  |
 223         | 09  |EXT  | 0B        | 0D WEAKU  | 0F WEAKT  |
 224
 225         | 10 WEAKD  | 12 COMM   | 14 SETA   | 16 SETT   |
 226         | 11 WEAKB  | 13        | 15        | 17        |
 227
 228         | 18 SETD   | 1A SETB   | 1C SETV   | 1E WARNING|
 229         | 19        | 1B        | 1D        | 1F FN     |
 230
 231         |_______________________________________________|
 232         | Debug entries with bit 01 set are unused.     |
 233         | 20 GSYM   | 22 FNAME  | 24 FUN    | 26 STSYM  |
 234         | 28 LCSYM  | 2A MAIN   | 2C ROSYM  | 2E        |
 235         | 30 PC     | 32 NSYMS  | 34 NOMAP  | 36        |
 236         | 38 OBJ    | 3A        | 3C OPT    | 3E        |
 237         | 40 RSYM   | 42 M2C    | 44 SLINE  | 46 DSLINE |
 238         | 48 BSLINE*| 4A DEFD   | 4C FLINE  | 4E        |
 239         | 50 EHDECL*| 52        | 54 CATCH  | 56        |
 240         | 58        | 5A        | 5C        | 5E        |
 241         | 60 SSYM   | 62 ENDM   | 64 SO     | 66        |
 242         | 68        | 6A        | 6C        | 6E        |
 243         | 70        | 72        | 74        | 76        |
 244         | 78        | 7A        | 7C        | 7E        |
 245         | 80 LSYM   | 82 BINCL  | 84 SOL    | 86        |
 246         | 88        | 8A        | 8C        | 8E        |
 247         | 90        | 92        | 94        | 96        |
 248         | 98        | 9A        | 9C        | 9E        |
 249         | A0 PSYM   | A2 EINCL  | A4 ENTRY  | A6        |
 250         | A8        | AA        | AC        | AE        |
 251         | B0        | B2        | B4        | B6        |
 252         | B8        | BA        | BC        | BE        |
 253         | C0 LBRAC  | C2 EXCL   | C4 SCOPE  | C6        |
 254         | C8        | CA        | CC        | CE        |
 255         | D0        | D2        | D4        | D6        |
 256         | D8        | DA        | DC        | DE        |
 257         | E0 RBRAC  | E2 BCOMM  | E4 ECOMM  | E6        |
 258         | E8 ECOML  | EA WITH   | EC        | EE        |
 259         | F0        | F2        | F4        | F6        |
 260         | F8        | FA        | FC        | FE LENG   |
 261         +-----------------------------------------------+
 262  * 50 EHDECL is also MOD2.
 263  * 48 BSLINE is also BROWS.
 264  */