include/aout/stab.def

   1 /* Table of DBX symbol codes for the GNU system.
   2    Copyright (C) 1988-2021 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU General Public License as
   6    published by the Free Software Foundation; either version 3 of the
   7    License, or (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., 51 Franklin Street - Fifth Floor, Boston,
  17    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 /* MacOS X:
  57    The beginning of a relocatable function block - including stabs.  */
  58 __define_stab (N_BNSYM, 0x2e, "BNSYM")
  59
  60 /* Global symbol in Pascal.
  61    Supposedly the value is its line number; I'm skeptical.  */
  62 __define_stab (N_PC, 0x30, "PC")
  63
  64 /* Number of symbols:  0, files,,funcs,lines according to Ultrix V4.0. */
  65 __define_stab (N_NSYMS, 0x32, "NSYMS")
  66
  67 /* "No DST map for sym: name, ,0,type,ignored"  according to Ultrix V4.0. */
  68 __define_stab (N_NOMAP, 0x34, "NOMAP")
  69
  70 /* New stab from Solaris 2.  Like N_SO, but for the object file.  Two in
  71    a row provide the build directory and the relative path of the .o from it.
  72    Solaris2 uses this to avoid putting the stabs info into the linked
  73    executable; this stab goes into the ".stab.index" section, and the debugger
  74    reads the real stabs directly from the .o files instead.  */
  75 __define_stab (N_OBJ, 0x38, "OBJ")
  76
  77 /* New stab from Solaris 2.  Options for the debugger, related to the
  78    source language for this module.  E.g. whether to use ANSI
  79    integral promotions or traditional integral promotions.  */
  80 __define_stab (N_OPT, 0x3c, "OPT")
  81
  82 /* Register variable.  Value is number of register.  */
  83 __define_stab (N_RSYM, 0x40, "RSYM")
  84
  85 /* Modula-2 compilation unit.  Can someone say what info it contains?  */
  86 __define_stab (N_M2C, 0x42, "M2C")
  87
  88 /* Line number in text segment.  Desc is the line number;
  89    value is corresponding address.  On Solaris2, the line number is
  90    relative to the start of the current function.  */
  91 __define_stab (N_SLINE, 0x44, "SLINE")
  92
  93 /* Similar, for data segment.  */
  94 __define_stab (N_DSLINE, 0x46, "DSLINE")
  95
  96 /* Similar, for bss segment.  */
  97 __define_stab (N_BSLINE, 0x48, "BSLINE")
  98
  99 /* Sun's source-code browser stabs.  ?? Don't know what the fields are.
 100    Supposedly the field is "path to associated .cb file".  THIS VALUE
 101    OVERLAPS WITH N_BSLINE!  */
 102 __define_stab_duplicate (N_BROWS, 0x48, "BROWS")
 103
 104 /* GNU Modula-2 definition module dependency.  Value is the modification time
 105    of the definition file.  Other is non-zero if it is imported with the
 106    GNU M2 keyword %INITIALIZE.  Perhaps N_M2C can be used if there
 107    are enough empty fields? */
 108 __define_stab(N_DEFD, 0x4a, "DEFD")
 109
 110 /* New in Solaris2.  Function start/body/end line numbers.  */
 111 __define_stab(N_FLINE, 0x4C, "FLINE")
 112
 113 /* MacOS X: This tells the end of a relocatable function + debugging info.  */
 114 __define_stab(N_ENSYM, 0x4E, "ENSYM")
 115
 116 /* THE FOLLOWING TWO STAB VALUES CONFLICT.  Happily, one is for Modula-2
 117    and one is for C++.   Still,... */
 118 /* GNU C++ exception variable.  Name is variable name.  */
 119 __define_stab (N_EHDECL, 0x50, "EHDECL")
 120 /* Modula2 info "for imc":  name,,0,0,0  according to Ultrix V4.0.  */
 121 __define_stab_duplicate (N_MOD2, 0x50, "MOD2")
 122
 123 /* GNU C++ `catch' clause.  Value is its address.  Desc is nonzero if
 124    this entry is immediately followed by a CAUGHT stab saying what exception
 125    was caught.  Multiple CAUGHT stabs means that multiple exceptions
 126    can be caught here.  If Desc is 0, it means all exceptions are caught
 127    here.  */
 128 __define_stab (N_CATCH, 0x54, "CATCH")
 129
 130 /* Structure or union element.  Value is offset in the structure.  */
 131 __define_stab (N_SSYM, 0x60, "SSYM")
 132
 133 /* Solaris2:  Last stab emitted for module.  */
 134 __define_stab (N_ENDM, 0x62, "ENDM")
 135
 136 /* Name of main source file.
 137    Value is starting text address of the compilation.
 138    If multiple N_SO's appear, the first to contain a trailing / is the
 139    compilation directory.  The first to not contain a trailing / is the
 140    source file name, relative to the compilation directory.  Others (perhaps
 141    resulting from cfront) are ignored.
 142    On Solaris2, value is undefined, but desc is a source-language code.  */
 143
 144 __define_stab (N_SO, 0x64, "SO")
 145
 146 /* Apple:  This is the stab that associated the .o file with the
 147    N_SO stab, in the case where debug info is mostly stored in the .o file.  */
 148 __define_stab (N_OSO, 0x66, "OSO")
 149
 150 /* SunPro F77:  Name of alias.  */
 151 __define_stab (N_ALIAS, 0x6c, "ALIAS")
 152
 153 /* Automatic variable in the stack.  Value is offset from frame pointer.
 154    Also used for type descriptions.  */
 155 __define_stab (N_LSYM, 0x80, "LSYM")
 156
 157 /* Beginning of an include file.  Only Sun uses this.
 158    In an object file, only the name is significant.
 159    The Sun linker puts data into some of the other fields.  */
 160 __define_stab (N_BINCL, 0x82, "BINCL")
 161
 162 /* Name of sub-source file (#include file).
 163    Value is starting text address of the compilation.  */
 164 __define_stab (N_SOL, 0x84, "SOL")
 165
 166 /* Parameter variable.  Value is offset from argument pointer.
 167    (On most machines the argument pointer is the same as the frame pointer.  */
 168 __define_stab (N_PSYM, 0xa0, "PSYM")
 169
 170 /* End of an include file.  No name.
 171    This and N_BINCL act as brackets around the file's output.
 172    In an object file, there is no significant data in this entry.
 173    The Sun linker puts data into some of the fields.  */
 174 __define_stab (N_EINCL, 0xa2, "EINCL")
 175
 176 /* Alternate entry point.  Value is its address.  */
 177 __define_stab (N_ENTRY, 0xa4, "ENTRY")
 178
 179 /* Beginning of lexical block.
 180    The desc is the nesting level in lexical blocks.
 181    The value is the address of the start of the text for the block.
 182    The variables declared inside the block *precede* the N_LBRAC symbol.
 183    On Solaris2, the value is relative to the start of the current function.  */
 184 __define_stab (N_LBRAC, 0xc0, "LBRAC")
 185
 186 /* Place holder for deleted include file.  Replaces a N_BINCL and everything
 187    up to the corresponding N_EINCL.  The Sun linker generates these when
 188    it finds multiple identical copies of the symbols from an include file.
 189    This appears only in output from the Sun linker.  */
 190 __define_stab (N_EXCL, 0xc2, "EXCL")
 191
 192 /* Modula-2 scope information.  Can someone say what info it contains?  */
 193 __define_stab (N_SCOPE, 0xc4, "SCOPE")
 194
 195 /* Solaris2: Patch Run Time Checker.  */
 196 __define_stab (N_PATCH, 0xd0, "PATCH")
 197
 198 /* End of a lexical block.  Desc matches the N_LBRAC's desc.
 199    The value is the address of the end of the text for the block.
 200    On Solaris2, the value is relative to the start of the current function.  */
 201 __define_stab (N_RBRAC, 0xe0, "RBRAC")
 202
 203 /* Begin named common block.  Only the name is significant.  */
 204 __define_stab (N_BCOMM, 0xe2, "BCOMM")
 205
 206 /* End named common block.  Only the name is significant
 207    (and it should match the N_BCOMM).  */
 208 __define_stab (N_ECOMM, 0xe4, "ECOMM")
 209
 210 /* Member of a common block; value is offset within the common block.
 211    This should occur within a BCOMM/ECOMM pair.  */
 212 __define_stab (N_ECOML, 0xe8, "ECOML")
 213
 214 /* Solaris2: Pascal "with" statement: type,,0,0,offset */
 215 __define_stab (N_WITH, 0xea, "WITH")
 216
 217 /* These STAB's are used on Gould systems for Non-Base register symbols
 218    or something like that.  FIXME.  I have assigned the values at random
 219    since I don't have a Gould here.  Fixups from Gould folk welcome... */
 220 __define_stab (N_NBTEXT, 0xF0, "NBTEXT")
 221 __define_stab (N_NBDATA, 0xF2, "NBDATA")
 222 __define_stab (N_NBBSS,  0xF4, "NBBSS")
 223 __define_stab (N_NBSTS,  0xF6, "NBSTS")
 224 __define_stab (N_NBLCS,  0xF8, "NBLCS")
 225
 226 /* Second symbol entry containing a length-value for the preceding entry.
 227    The value is the length.  */
 228 __define_stab (N_LENG, 0xfe, "LENG")
 229 \f
 230 /* The above information, in matrix format.
 231
 232                         STAB MATRIX
 233         _________________________________________________
 234         | 00 - 1F are not dbx stab symbols              |
 235         | In most cases, the low bit is the EXTernal bit|
 236
 237         | 00 UNDEF  | 02 ABS    | 04 TEXT   | 06 DATA   |
 238         | 01  |EXT  | 03  |EXT  | 05  |EXT  | 07  |EXT  |
 239
 240         | 08 BSS    | 0A INDR   | 0C FN_SEQ | 0E WEAKA  |
 241         | 09  |EXT  | 0B        | 0D WEAKU  | 0F WEAKT  |
 242
 243         | 10 WEAKD  | 12 COMM   | 14 SETA   | 16 SETT   |
 244         | 11 WEAKB  | 13        | 15        | 17        |
 245
 246         | 18 SETD   | 1A SETB   | 1C SETV   | 1E WARNING|
 247         | 19        | 1B        | 1D        | 1F FN     |
 248
 249         |_______________________________________________|
 250         | Debug entries with bit 01 set are unused.     |
 251         | 20 GSYM   | 22 FNAME  | 24 FUN    | 26 STSYM  |
 252         | 28 LCSYM  | 2A MAIN   | 2C ROSYM  | 2E        |
 253         | 30 PC     | 32 NSYMS  | 34 NOMAP  | 36        |
 254         | 38 OBJ    | 3A        | 3C OPT    | 3E        |
 255         | 40 RSYM   | 42 M2C    | 44 SLINE  | 46 DSLINE |
 256         | 48 BSLINE*| 4A DEFD   | 4C FLINE  | 4E        |
 257         | 50 EHDECL*| 52        | 54 CATCH  | 56        |
 258         | 58        | 5A        | 5C        | 5E        |
 259         | 60 SSYM   | 62 ENDM   | 64 SO     | 66        |
 260         | 68        | 6A        | 6C ALIAS  | 6E        |
 261         | 70        | 72        | 74        | 76        |
 262         | 78        | 7A        | 7C        | 7E        |
 263         | 80 LSYM   | 82 BINCL  | 84 SOL    | 86        |
 264         | 88        | 8A        | 8C        | 8E        |
 265         | 90        | 92        | 94        | 96        |
 266         | 98        | 9A        | 9C        | 9E        |
 267         | A0 PSYM   | A2 EINCL  | A4 ENTRY  | A6        |
 268         | A8        | AA        | AC        | AE        |
 269         | B0        | B2        | B4        | B6        |
 270         | B8        | BA        | BC        | BE        |
 271         | C0 LBRAC  | C2 EXCL   | C4 SCOPE  | C6        |
 272         | C8        | CA        | CC        | CE        |
 273         | D0 PATCH  | D2        | D4        | D6        |
 274         | D8        | DA        | DC        | DE        |
 275         | E0 RBRAC  | E2 BCOMM  | E4 ECOMM  | E6        |
 276         | E8 ECOML  | EA WITH   | EC        | EE        |
 277         | F0        | F2        | F4        | F6        |
 278         | F8        | FA        | FC        | FE LENG   |
 279         +-----------------------------------------------+
 280  * 50 EHDECL is also MOD2.
 281  * 48 BSLINE is also BROWS.
 282  */