include/aout/stab.def

   1 /* Table of DBX symbol codes for the GNU system.
   2    Copyright 1988, 1991, 1992, 1993, 1994, 1996, 1998, 2004
   3    Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU 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    This program 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
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; if not, write to the Free Software
  17    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
  18 \f
  19 /* New stab from Solaris 2.  This uses an n_type of 0, which in a.out files
  20    overlaps the N_UNDF used for ordinary symbols.  In ELF files, the
  21    debug information is in a different file section, so there is no conflict.
  22    This symbol's n_value gives the size of the string section associated
  23    with this file.  The symbol's n_strx (relative to the just-updated
  24    string section start address) gives the name of the source file,
  25    e.g. "foo.c", without any path information.  The symbol's n_desc gives
  26    the count of upcoming symbols associated with this file (not including
  27    this one).  */
  28 /* __define_stab (N_UNDF, 0x00, "UNDF")  */
  29
  30 /* Global variable.  Only the name is significant.
  31    To find the address, look in the corresponding external symbol.  */
  32 __define_stab (N_GSYM, 0x20, "GSYM")
  33
  34 /* Function name for BSD Fortran.  Only the name is significant.
  35    To find the address, look in the corresponding external symbol.  */
  36 __define_stab (N_FNAME, 0x22, "FNAME")
  37
  38 /* Function name or text-segment variable for C.  Value is its address.
  39    Desc is supposedly starting line number, but GCC doesn't set it
  40    and DBX seems not to miss it.  */
  41 __define_stab (N_FUN, 0x24, "FUN")
  42
  43 /* Data-segment variable with internal linkage.  Value is its address.
  44    "Static Sym".  */
  45 __define_stab (N_STSYM, 0x26, "STSYM")
  46
  47 /* BSS-segment variable with internal linkage.  Value is its address.  */
  48 __define_stab (N_LCSYM, 0x28, "LCSYM")
  49
  50 /* Name of main routine.  Only the name is significant.  */
  51 __define_stab (N_MAIN, 0x2a, "MAIN")
  52
  53 /* Solaris2:  Read-only data symbols.  */
  54 __define_stab (N_ROSYM, 0x2c, "ROSYM")
  55
  56 /* Global symbol in Pascal.
  57    Supposedly the value is its line number; I'm skeptical.  */
  58 __define_stab (N_PC, 0x30, "PC")
  59
  60 /* Number of symbols:  0, files,,funcs,lines according to Ultrix V4.0. */
  61 __define_stab (N_NSYMS, 0x32, "NSYMS")
  62
  63 /* "No DST map for sym: name, ,0,type,ignored"  according to Ultrix V4.0. */
  64 __define_stab (N_NOMAP, 0x34, "NOMAP")
  65
  66 /* New stab from Solaris 2.  Like N_SO, but for the object file.  Two in
  67    a row provide the build directory and the relative path of the .o from it.
  68    Solaris2 uses this to avoid putting the stabs info into the linked
  69    executable; this stab goes into the ".stab.index" section, and the debugger
  70    reads the real stabs directly from the .o files instead.  */
  71 __define_stab (N_OBJ, 0x38, "OBJ")
  72
  73 /* New stab from Solaris 2.  Options for the debugger, related to the
  74    source language for this module.  E.g. whether to use ANSI
  75    integral promotions or traditional integral promotions.  */
  76 __define_stab (N_OPT, 0x3c, "OPT")
  77
  78 /* Register variable.  Value is number of register.  */
  79 __define_stab (N_RSYM, 0x40, "RSYM")
  80
  81 /* Modula-2 compilation unit.  Can someone say what info it contains?  */
  82 __define_stab (N_M2C, 0x42, "M2C")
  83
  84 /* Line number in text segment.  Desc is the line number;
  85    value is corresponding address.  On Solaris2, the line number is
  86    relative to the start of the current function.  */
  87 __define_stab (N_SLINE, 0x44, "SLINE")
  88
  89 /* Similar, for data segment.  */
  90 __define_stab (N_DSLINE, 0x46, "DSLINE")
  91
  92 /* Similar, for bss segment.  */
  93 __define_stab (N_BSLINE, 0x48, "BSLINE")
  94
  95 /* Sun's source-code browser stabs.  ?? Don't know what the fields are.
  96    Supposedly the field is "path to associated .cb file".  THIS VALUE
  97    OVERLAPS WITH N_BSLINE!  */
  98 __define_stab_duplicate (N_BROWS, 0x48, "BROWS")
  99
 100 /* GNU Modula-2 definition module dependency.  Value is the modification time
 101    of the definition file.  Other is non-zero if it is imported with the
 102    GNU M2 keyword %INITIALIZE.  Perhaps N_M2C can be used if there
 103    are enough empty fields? */
 104 __define_stab(N_DEFD, 0x4a, "DEFD")
 105
 106 /* New in Solaris2.  Function start/body/end line numbers.  */
 107 __define_stab(N_FLINE, 0x4C, "FLINE")
 108
 109 /* THE FOLLOWING TWO STAB VALUES CONFLICT.  Happily, one is for Modula-2
 110    and one is for C++.   Still,... */
 111 /* GNU C++ exception variable.  Name is variable name.  */
 112 __define_stab (N_EHDECL, 0x50, "EHDECL")
 113 /* Modula2 info "for imc":  name,,0,0,0  according to Ultrix V4.0.  */
 114 __define_stab_duplicate (N_MOD2, 0x50, "MOD2")
 115
 116 /* GNU C++ `catch' clause.  Value is its address.  Desc is nonzero if
 117    this entry is immediately followed by a CAUGHT stab saying what exception
 118    was caught.  Multiple CAUGHT stabs means that multiple exceptions
 119    can be caught here.  If Desc is 0, it means all exceptions are caught
 120    here.  */
 121 __define_stab (N_CATCH, 0x54, "CATCH")
 122
 123 /* Structure or union element.  Value is offset in the structure.  */
 124 __define_stab (N_SSYM, 0x60, "SSYM")
 125
 126 /* Solaris2:  Last stab emitted for module.  */
 127 __define_stab (N_ENDM, 0x62, "ENDM")
 128
 129 /* Name of main source file.
 130    Value is starting text address of the compilation.
 131    If multiple N_SO's appear, the first to contain a trailing / is the
 132    compilation directory.  The first to not contain a trailing / is the
 133    source file name, relative to the compilation directory.  Others (perhaps
 134    resulting from cfront) are ignored.
 135    On Solaris2, value is undefined, but desc is a source-language code.  */
 136
 137 __define_stab (N_SO, 0x64, "SO")
 138
 139 /* SunPro F77:  Name of alias.  */
 140 __define_stab (N_ALIAS, 0x6c, "ALIAS")
 141
 142 /* Automatic variable in the stack.  Value is offset from frame pointer.
 143    Also used for type descriptions.  */
 144 __define_stab (N_LSYM, 0x80, "LSYM")
 145
 146 /* Beginning of an include file.  Only Sun uses this.
 147    In an object file, only the name is significant.
 148    The Sun linker puts data into some of the other fields.  */
 149 __define_stab (N_BINCL, 0x82, "BINCL")
 150
 151 /* Name of sub-source file (#include file).
 152    Value is starting text address of the compilation.  */
 153 __define_stab (N_SOL, 0x84, "SOL")
 154
 155 /* Parameter variable.  Value is offset from argument pointer.
 156    (On most machines the argument pointer is the same as the frame pointer.  */
 157 __define_stab (N_PSYM, 0xa0, "PSYM")
 158
 159 /* End of an include file.  No name.
 160    This and N_BINCL act as brackets around the file's output.
 161    In an object file, there is no significant data in this entry.
 162    The Sun linker puts data into some of the fields.  */
 163 __define_stab (N_EINCL, 0xa2, "EINCL")
 164
 165 /* Alternate entry point.  Value is its address.  */
 166 __define_stab (N_ENTRY, 0xa4, "ENTRY")
 167
 168 /* Beginning of lexical block.
 169    The desc is the nesting level in lexical blocks.
 170    The value is the address of the start of the text for the block.
 171    The variables declared inside the block *precede* the N_LBRAC symbol.
 172    On Solaris2, the value is relative to the start of the current function.  */
 173 __define_stab (N_LBRAC, 0xc0, "LBRAC")
 174
 175 /* Place holder for deleted include file.  Replaces a N_BINCL and everything
 176    up to the corresponding N_EINCL.  The Sun linker generates these when
 177    it finds multiple identical copies of the symbols from an include file.
 178    This appears only in output from the Sun linker.  */
 179 __define_stab (N_EXCL, 0xc2, "EXCL")
 180
 181 /* Modula-2 scope information.  Can someone say what info it contains?  */
 182 __define_stab (N_SCOPE, 0xc4, "SCOPE")
 183
 184 /* Solaris2: Patch Run Time Checker.  */
 185 __define_stab (N_PATCH, 0xd0, "PATCH")
 186
 187 /* End of a lexical block.  Desc matches the N_LBRAC's desc.
 188    The value is the address of the end of the text for the block.
 189    On Solaris2, the value is relative to the start of the current function.  */
 190 __define_stab (N_RBRAC, 0xe0, "RBRAC")
 191
 192 /* Begin named common block.  Only the name is significant.  */
 193 __define_stab (N_BCOMM, 0xe2, "BCOMM")
 194
 195 /* End named common block.  Only the name is significant
 196    (and it should match the N_BCOMM).  */
 197 __define_stab (N_ECOMM, 0xe4, "ECOMM")
 198
 199 /* Member of a common block; value is offset within the common block.
 200    This should occur within a BCOMM/ECOMM pair.  */
 201 __define_stab (N_ECOML, 0xe8, "ECOML")
 202
 203 /* Solaris2: Pascal "with" statement: type,,0,0,offset */
 204 __define_stab (N_WITH, 0xea, "WITH")
 205
 206 /* These STAB's are used on Gould systems for Non-Base register symbols
 207    or something like that.  FIXME.  I have assigned the values at random
 208    since I don't have a Gould here.  Fixups from Gould folk welcome... */
 209 __define_stab (N_NBTEXT, 0xF0, "NBTEXT")
 210 __define_stab (N_NBDATA, 0xF2, "NBDATA")
 211 __define_stab (N_NBBSS,  0xF4, "NBBSS")
 212 __define_stab (N_NBSTS,  0xF6, "NBSTS")
 213 __define_stab (N_NBLCS,  0xF8, "NBLCS")
 214
 215 /* Second symbol entry containing a length-value for the preceding entry.
 216    The value is the length.  */
 217 __define_stab (N_LENG, 0xfe, "LENG")
 218 \f
 219 /* The above information, in matrix format.
 220
 221                         STAB MATRIX
 222         _________________________________________________
 223         | 00 - 1F are not dbx stab symbols              |
 224         | In most cases, the low bit is the EXTernal bit|
 225
 226         | 00 UNDEF  | 02 ABS    | 04 TEXT   | 06 DATA   |
 227         | 01  |EXT  | 03  |EXT  | 05  |EXT  | 07  |EXT  |
 228
 229         | 08 BSS    | 0A INDR   | 0C FN_SEQ | 0E WEAKA  |
 230         | 09  |EXT  | 0B        | 0D WEAKU  | 0F WEAKT  |
 231
 232         | 10 WEAKD  | 12 COMM   | 14 SETA   | 16 SETT   |
 233         | 11 WEAKB  | 13        | 15        | 17        |
 234
 235         | 18 SETD   | 1A SETB   | 1C SETV   | 1E WARNING|
 236         | 19        | 1B        | 1D        | 1F FN     |
 237
 238         |_______________________________________________|
 239         | Debug entries with bit 01 set are unused.     |
 240         | 20 GSYM   | 22 FNAME  | 24 FUN    | 26 STSYM  |
 241         | 28 LCSYM  | 2A MAIN   | 2C ROSYM  | 2E        |
 242         | 30 PC     | 32 NSYMS  | 34 NOMAP  | 36        |
 243         | 38 OBJ    | 3A        | 3C OPT    | 3E        |
 244         | 40 RSYM   | 42 M2C    | 44 SLINE  | 46 DSLINE |
 245         | 48 BSLINE*| 4A DEFD   | 4C FLINE  | 4E        |
 246         | 50 EHDECL*| 52        | 54 CATCH  | 56        |
 247         | 58        | 5A        | 5C        | 5E        |
 248         | 60 SSYM   | 62 ENDM   | 64 SO     | 66        |
 249         | 68        | 6A        | 6C ALIAS  | 6E        |
 250         | 70        | 72        | 74        | 76        |
 251         | 78        | 7A        | 7C        | 7E        |
 252         | 80 LSYM   | 82 BINCL  | 84 SOL    | 86        |
 253         | 88        | 8A        | 8C        | 8E        |
 254         | 90        | 92        | 94        | 96        |
 255         | 98        | 9A        | 9C        | 9E        |
 256         | A0 PSYM   | A2 EINCL  | A4 ENTRY  | A6        |
 257         | A8        | AA        | AC        | AE        |
 258         | B0        | B2        | B4        | B6        |
 259         | B8        | BA        | BC        | BE        |
 260         | C0 LBRAC  | C2 EXCL   | C4 SCOPE  | C6        |
 261         | C8        | CA        | CC        | CE        |
 262         | D0 PATCH  | D2        | D4        | D6        |
 263         | D8        | DA        | DC        | DE        |
 264         | E0 RBRAC  | E2 BCOMM  | E4 ECOMM  | E6        |
 265         | E8 ECOML  | EA WITH   | EC        | EE        |
 266         | F0        | F2        | F4        | F6        |
 267         | F8        | FA        | FC        | FE LENG   |
 268         +-----------------------------------------------+
 269  * 50 EHDECL is also MOD2.
 270  * 48 BSLINE is also BROWS.
 271  */