gdb/partial-stab.h

   1 /* Shared code to pre-read a stab (dbx-style), when building a psymtab.
   2    Copyright 1986, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 1998
   3    Free Software Foundation, Inc.
   4
   5 This file is part of GDB.
   6
   7 This program is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2 of the License, or
  10 (at your option) any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program; if not, write to the Free Software
  19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  20
  21 /* The following need to be defined:
  22    SET_NAMESTRING() --Set namestring to name of symbol.
  23    CUR_SYMBOL_TYPE --Type code of current symbol.
  24    CUR_SYMBOL_VALUE --Value field of current symbol.  May be adjusted here.
  25    namestring - variable pointing to the name of the stab.
  26    section_offsets - variable pointing to the section offsets.
  27    pst - the partial symbol table being built.
  28
  29    psymtab_include_list, includes_used, includes_allocated - list of include
  30      file names (N_SOL) seen so far.
  31    dependency_list, dependencies_used, dependencies_allocated - list of
  32      N_EXCL stabs seen so far.
  33
  34    END_PSYMTAB -- end a partial symbol table.
  35    START_PSYMTAB -- start a partial symbol table.
  36  */
  37
  38 /* End of macro definitions, now let's handle them symbols!  */
  39
  40       switch (CUR_SYMBOL_TYPE)
  41         {
  42           char *p;
  43           /*
  44            * Standard, external, non-debugger, symbols
  45            */
  46
  47         case N_TEXT | N_EXT:
  48         case N_NBTEXT | N_EXT:
  49           CUR_SYMBOL_VALUE += ANOFFSET (section_offsets, SECT_OFF_TEXT);
  50           goto record_it;
  51
  52         case N_DATA | N_EXT:
  53         case N_NBDATA | N_EXT:
  54           CUR_SYMBOL_VALUE += ANOFFSET (section_offsets, SECT_OFF_DATA);
  55           goto record_it;
  56
  57         case N_BSS:
  58         case N_BSS | N_EXT:
  59         case N_NBBSS | N_EXT:
  60         case N_SETV | N_EXT:            /* FIXME, is this in BSS? */
  61           CUR_SYMBOL_VALUE += ANOFFSET (section_offsets, SECT_OFF_BSS);
  62           goto record_it;
  63
  64         case N_ABS | N_EXT:
  65         record_it:
  66 #ifdef DBXREAD_ONLY
  67           SET_NAMESTRING();
  68
  69         bss_ext_symbol:
  70           record_minimal_symbol (namestring, CUR_SYMBOL_VALUE,
  71                                  CUR_SYMBOL_TYPE, objfile); /* Always */
  72 #endif /* DBXREAD_ONLY */
  73           continue;
  74
  75           /* Standard, local, non-debugger, symbols */
  76
  77         case N_NBTEXT:
  78
  79           /* We need to be able to deal with both N_FN or N_TEXT,
  80              because we have no way of knowing whether the sys-supplied ld
  81              or GNU ld was used to make the executable.  Sequents throw
  82              in another wrinkle -- they renumbered N_FN.  */
  83
  84         case N_FN:
  85         case N_FN_SEQ:
  86         case N_TEXT:
  87 #ifdef DBXREAD_ONLY
  88           CUR_SYMBOL_VALUE += ANOFFSET (section_offsets, SECT_OFF_TEXT);
  89           SET_NAMESTRING();
  90           if ((namestring[0] == '-' && namestring[1] == 'l')
  91               || (namestring [(nsl = strlen (namestring)) - 1] == 'o'
  92                   && namestring [nsl - 2] == '.'))
  93             {
  94               if (objfile -> ei.entry_point <  CUR_SYMBOL_VALUE &&
  95                   objfile -> ei.entry_point >= last_o_file_start)
  96                 {
  97                   objfile -> ei.entry_file_lowpc = last_o_file_start;
  98                   objfile -> ei.entry_file_highpc = CUR_SYMBOL_VALUE;
  99                 }
 100               if (past_first_source_file && pst
 101                   /* The gould NP1 uses low values for .o and -l symbols
 102                      which are not the address.  */
 103                   && CUR_SYMBOL_VALUE >= pst->textlow)
 104                 {
 105                   END_PSYMTAB (pst, psymtab_include_list, includes_used,
 106                                symnum * symbol_size,
 107                                CUR_SYMBOL_VALUE > pst->texthigh
 108                                  ? CUR_SYMBOL_VALUE : pst->texthigh,
 109                                dependency_list, dependencies_used, textlow_not_set);
 110                   pst = (struct partial_symtab *) 0;
 111                   includes_used = 0;
 112                   dependencies_used = 0;
 113                 }
 114               else
 115                 past_first_source_file = 1;
 116               last_o_file_start = CUR_SYMBOL_VALUE;
 117             }
 118           else
 119             goto record_it;
 120 #endif /* DBXREAD_ONLY */
 121           continue;
 122
 123         case N_DATA:
 124           CUR_SYMBOL_VALUE += ANOFFSET (section_offsets, SECT_OFF_DATA);
 125           goto record_it;
 126
 127         case N_UNDF | N_EXT:
 128 #ifdef DBXREAD_ONLY
 129           if (CUR_SYMBOL_VALUE != 0) {
 130             /* This is a "Fortran COMMON" symbol.  See if the target
 131                environment knows where it has been relocated to.  */
 132
 133             CORE_ADDR reladdr;
 134
 135             SET_NAMESTRING();
 136             if (target_lookup_symbol (namestring, &reladdr)) {
 137               continue;         /* Error in lookup; ignore symbol for now.  */
 138             }
 139             CUR_SYMBOL_TYPE ^= (N_BSS^N_UNDF);  /* Define it as a bss-symbol */
 140             CUR_SYMBOL_VALUE = reladdr;
 141             goto bss_ext_symbol;
 142           }
 143 #endif /* DBXREAD_ONLY */
 144           continue;     /* Just undefined, not COMMON */
 145
 146         case N_UNDF:
 147 #ifdef DBXREAD_ONLY
 148           if (processing_acc_compilation && CUR_SYMBOL_STRX == 1) {
 149             /* Deal with relative offsets in the string table
 150                used in ELF+STAB under Solaris.  If we want to use the
 151                n_strx field, which contains the name of the file,
 152                we must adjust file_string_table_offset *before* calling
 153                SET_NAMESTRING().  */
 154             past_first_source_file = 1;
 155             file_string_table_offset = next_file_string_table_offset;
 156             next_file_string_table_offset =
 157               file_string_table_offset + CUR_SYMBOL_VALUE;
 158             if (next_file_string_table_offset < file_string_table_offset)
 159               error ("string table offset backs up at %d", symnum);
 160   /* FIXME -- replace error() with complaint.  */
 161             continue;
 162           }
 163 #endif /* DBXREAD_ONLY */
 164           continue;
 165
 166             /* Lots of symbol types we can just ignore.  */
 167
 168         case N_ABS:
 169         case N_NBDATA:
 170         case N_NBBSS:
 171           continue;
 172
 173           /* Keep going . . .*/
 174
 175           /*
 176            * Special symbol types for GNU
 177            */
 178         case N_INDR:
 179         case N_INDR | N_EXT:
 180         case N_SETA:
 181         case N_SETA | N_EXT:
 182         case N_SETT:
 183         case N_SETT | N_EXT:
 184         case N_SETD:
 185         case N_SETD | N_EXT:
 186         case N_SETB:
 187         case N_SETB | N_EXT:
 188         case N_SETV:
 189           continue;
 190
 191           /*
 192            * Debugger symbols
 193            */
 194
 195         case N_SO: {
 196           unsigned long valu;
 197           static int prev_so_symnum = -10;
 198           static int first_so_symnum;
 199           char *p;
 200           int prev_textlow_not_set;
 201
 202           valu = CUR_SYMBOL_VALUE + ANOFFSET (section_offsets, SECT_OFF_TEXT);
 203
 204           prev_textlow_not_set = textlow_not_set;
 205
 206 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
 207           /* A zero value is probably an indication for the SunPRO 3.0
 208              compiler. end_psymtab explicitly tests for zero, so
 209              don't relocate it.  */
 210
 211           if (CUR_SYMBOL_VALUE == 0)
 212             {
 213               textlow_not_set = 1;
 214               valu = 0;
 215             }
 216           else
 217             textlow_not_set = 0;
 218 #else
 219           textlow_not_set = 0;
 220 #endif
 221           past_first_source_file = 1;
 222
 223           if (prev_so_symnum != symnum - 1)
 224             {                   /* Here if prev stab wasn't N_SO */
 225               first_so_symnum = symnum;
 226
 227               if (pst)
 228                 {
 229                   END_PSYMTAB (pst, psymtab_include_list, includes_used,
 230                                symnum * symbol_size,
 231                                valu > pst->texthigh ? valu : pst->texthigh,
 232                                dependency_list, dependencies_used,
 233                                prev_textlow_not_set);
 234                   pst = (struct partial_symtab *) 0;
 235                   includes_used = 0;
 236                   dependencies_used = 0;
 237                 }
 238             }
 239
 240           prev_so_symnum = symnum;
 241
 242           /* End the current partial symtab and start a new one */
 243
 244           SET_NAMESTRING();
 245
 246           /* Null name means end of .o file.  Don't start a new one. */
 247           if (*namestring == '\000')
 248             continue;
 249
 250           /* Some compilers (including gcc) emit a pair of initial N_SOs.
 251              The first one is a directory name; the second the file name.
 252              If pst exists, is empty, and has a filename ending in '/',
 253              we assume the previous N_SO was a directory name. */
 254
 255           p = strrchr (namestring, '/');
 256           if (p && *(p+1) == '\000')
 257             continue;           /* Simply ignore directory name SOs */
 258
 259           /* Some other compilers (C++ ones in particular) emit useless
 260              SOs for non-existant .c files.  We ignore all subsequent SOs that
 261              immediately follow the first.  */
 262
 263           if (!pst)
 264             pst = START_PSYMTAB (objfile, section_offsets,
 265                                  namestring, valu,
 266                                  first_so_symnum * symbol_size,
 267                                  objfile -> global_psymbols.next,
 268                                  objfile -> static_psymbols.next);
 269           continue;
 270         }
 271
 272         case N_BINCL:
 273           {
 274 #ifdef DBXREAD_ONLY
 275             enum language tmp_language;
 276             /* Add this bincl to the bincl_list for future EXCLs.  No
 277                need to save the string; it'll be around until
 278                read_dbx_symtab function returns */
 279
 280             SET_NAMESTRING();
 281
 282             tmp_language = deduce_language_from_filename (namestring);
 283
 284             /* Only change the psymtab's language if we've learned
 285                something useful (eg. tmp_language is not language_unknown).
 286                In addition, to match what start_subfile does, never change
 287                from C++ to C.  */
 288             if (tmp_language != language_unknown
 289                 && (tmp_language != language_c
 290                     || psymtab_language != language_cplus))
 291               psymtab_language = tmp_language;
 292
 293             if (pst == NULL)
 294               {
 295                 /* FIXME: we should not get here without a PST to work on.
 296                    Attempt to recover.  */
 297                 complain (&unclaimed_bincl_complaint, namestring, symnum);
 298                 continue;
 299               }
 300             add_bincl_to_list (pst, namestring, CUR_SYMBOL_VALUE);
 301
 302             /* Mark down an include file in the current psymtab */
 303
 304             goto record_include_file;
 305
 306 #else /* DBXREAD_ONLY */
 307             continue;
 308 #endif
 309           }
 310
 311         case N_SOL:
 312           {
 313             enum language tmp_language;
 314             /* Mark down an include file in the current psymtab */
 315
 316             SET_NAMESTRING();
 317
 318             tmp_language = deduce_language_from_filename (namestring);
 319
 320             /* Only change the psymtab's language if we've learned
 321                something useful (eg. tmp_language is not language_unknown).
 322                In addition, to match what start_subfile does, never change
 323                from C++ to C.  */
 324             if (tmp_language != language_unknown
 325                 && (tmp_language != language_c
 326                     || psymtab_language != language_cplus))
 327               psymtab_language = tmp_language;
 328
 329             /* In C++, one may expect the same filename to come round many
 330                times, when code is coming alternately from the main file
 331                and from inline functions in other files. So I check to see
 332                if this is a file we've seen before -- either the main
 333                source file, or a previously included file.
 334
 335                This seems to be a lot of time to be spending on N_SOL, but
 336                things like "break c-exp.y:435" need to work (I
 337                suppose the psymtab_include_list could be hashed or put
 338                in a binary tree, if profiling shows this is a major hog).  */
 339             if (pst && STREQ (namestring, pst->filename))
 340               continue;
 341             {
 342               register int i;
 343               for (i = 0; i < includes_used; i++)
 344                 if (STREQ (namestring, psymtab_include_list[i]))
 345                   {
 346                     i = -1;
 347                     break;
 348                   }
 349               if (i == -1)
 350                 continue;
 351             }
 352
 353 #ifdef DBXREAD_ONLY
 354           record_include_file:
 355 #endif
 356
 357             psymtab_include_list[includes_used++] = namestring;
 358             if (includes_used >= includes_allocated)
 359               {
 360                 char **orig = psymtab_include_list;
 361
 362                 psymtab_include_list = (char **)
 363                   alloca ((includes_allocated *= 2) *
 364                           sizeof (char *));
 365                 memcpy ((PTR)psymtab_include_list, (PTR)orig,
 366                         includes_used * sizeof (char *));
 367               }
 368             continue;
 369           }
 370         case N_LSYM:            /* Typedef or automatic variable. */
 371         case N_STSYM:           /* Data seg var -- static  */
 372         case N_LCSYM:           /* BSS      "  */
 373         case N_ROSYM:           /* Read-only data seg var -- static.  */
 374         case N_NBSTS:           /* Gould nobase.  */
 375         case N_NBLCS:           /* symbols.  */
 376         case N_FUN:
 377         case N_GSYM:            /* Global (extern) variable; can be
 378                                    data or bss (sigh FIXME).  */
 379
 380         /* Following may probably be ignored; I'll leave them here
 381            for now (until I do Pascal and Modula 2 extensions).  */
 382
 383         case N_PC:              /* I may or may not need this; I
 384                                    suspect not.  */
 385         case N_M2C:             /* I suspect that I can ignore this here. */
 386         case N_SCOPE:           /* Same.   */
 387
 388           SET_NAMESTRING();
 389
 390 #ifdef DBXREAD_ONLY
 391           /* See if this is an end of function stab.  */
 392           if (CUR_SYMBOL_TYPE == N_FUN && *namestring == '\000')
 393             {
 394               unsigned long valu;
 395
 396               /* It's value is the size (in bytes) of the function for
 397                  function relative stabs, or the address of the function's
 398                  end for old style stabs.  */
 399               valu = CUR_SYMBOL_VALUE + last_function_start;
 400               if (pst->texthigh == 0 || valu > pst->texthigh)
 401                 pst->texthigh = valu;
 402               break;
 403              }
 404 #endif
 405
 406           p = (char *) strchr (namestring, ':');
 407           if (!p)
 408             continue;           /* Not a debugging symbol.   */
 409
 410
 411
 412           /* Main processing section for debugging symbols which
 413              the initial read through the symbol tables needs to worry
 414              about.  If we reach this point, the symbol which we are
 415              considering is definitely one we are interested in.
 416              p must also contain the (valid) index into the namestring
 417              which indicates the debugging type symbol.  */
 418
 419           switch (p[1])
 420             {
 421             case 'S':
 422               CUR_SYMBOL_VALUE += ANOFFSET (section_offsets, SECT_OFF_DATA);
 423 #ifdef STATIC_TRANSFORM_NAME
 424               namestring = STATIC_TRANSFORM_NAME (namestring);
 425 #endif
 426               add_psymbol_to_list (namestring, p - namestring,
 427                                    VAR_NAMESPACE, LOC_STATIC,
 428                                    &objfile->static_psymbols,
 429                                    0, CUR_SYMBOL_VALUE,
 430                                    psymtab_language, objfile);
 431               continue;
 432             case 'G':
 433               CUR_SYMBOL_VALUE += ANOFFSET (section_offsets, SECT_OFF_DATA);
 434               /* The addresses in these entries are reported to be
 435                  wrong.  See the code that reads 'G's for symtabs. */
 436               add_psymbol_to_list (namestring, p - namestring,
 437                                    VAR_NAMESPACE, LOC_STATIC,
 438                                    &objfile->global_psymbols,
 439                                    0, CUR_SYMBOL_VALUE,
 440                                    psymtab_language, objfile);
 441               continue;
 442
 443             case 'T':
 444               /* When a 'T' entry is defining an anonymous enum, it
 445                  may have a name which is the empty string, or a
 446                  single space.  Since they're not really defining a
 447                  symbol, those shouldn't go in the partial symbol
 448                  table.  We do pick up the elements of such enums at
 449                  'check_enum:', below.  */
 450               if (p >= namestring + 2
 451                   || (p == namestring + 1
 452                       && namestring[0] != ' '))
 453                 {
 454                   add_psymbol_to_list (namestring, p - namestring,
 455                                        STRUCT_NAMESPACE, LOC_TYPEDEF,
 456                                        &objfile->static_psymbols,
 457                                        CUR_SYMBOL_VALUE, 0,
 458                                        psymtab_language, objfile);
 459                   if (p[2] == 't')
 460                     {
 461                       /* Also a typedef with the same name.  */
 462                       add_psymbol_to_list (namestring, p - namestring,
 463                                            VAR_NAMESPACE, LOC_TYPEDEF,
 464                                            &objfile->static_psymbols,
 465                                            CUR_SYMBOL_VALUE, 0,
 466                                            psymtab_language, objfile);
 467                       p += 1;
 468                     }
 469                   /* The semantics of C++ state that "struct foo { ... }"
 470                      also defines a typedef for "foo".  Unfortuantely, cfront
 471                      never makes the typedef when translating from C++ to C.
 472                      We make the typedef here so that "ptype foo" works as
 473                      expected for cfront translated code.  */
 474                   else if (psymtab_language == language_cplus)
 475                    {
 476                       /* Also a typedef with the same name.  */
 477                       add_psymbol_to_list (namestring, p - namestring,
 478                                            VAR_NAMESPACE, LOC_TYPEDEF,
 479                                            &objfile->static_psymbols,
 480                                            CUR_SYMBOL_VALUE, 0,
 481                                            psymtab_language, objfile);
 482                    }
 483                 }
 484               goto check_enum;
 485             case 't':
 486               if (p != namestring)      /* a name is there, not just :T... */
 487                 {
 488                   add_psymbol_to_list (namestring, p - namestring,
 489                                        VAR_NAMESPACE, LOC_TYPEDEF,
 490                                        &objfile->static_psymbols,
 491                                        CUR_SYMBOL_VALUE, 0,
 492                                        psymtab_language, objfile);
 493                 }
 494             check_enum:
 495               /* If this is an enumerated type, we need to
 496                  add all the enum constants to the partial symbol
 497                  table.  This does not cover enums without names, e.g.
 498                  "enum {a, b} c;" in C, but fortunately those are
 499                  rare.  There is no way for GDB to find those from the
 500                  enum type without spending too much time on it.  Thus
 501                  to solve this problem, the compiler needs to put out the
 502                  enum in a nameless type.  GCC2 does this.  */
 503
 504               /* We are looking for something of the form
 505                  <name> ":" ("t" | "T") [<number> "="] "e"
 506                  {<constant> ":" <value> ","} ";".  */
 507
 508               /* Skip over the colon and the 't' or 'T'.  */
 509               p += 2;
 510               /* This type may be given a number.  Also, numbers can come
 511                  in pairs like (0,26).  Skip over it.  */
 512               while ((*p >= '0' && *p <= '9')
 513                      || *p == '(' || *p == ',' || *p == ')'
 514                      || *p == '=')
 515                 p++;
 516
 517               if (*p++ == 'e')
 518                 {
 519                   /* The aix4 compiler emits extra crud before the members.  */
 520                   if (*p == '-')
 521                     {
 522                       /* Skip over the type (?).  */
 523                       while (*p != ':')
 524                         p++;
 525
 526                       /* Skip over the colon.  */
 527                       p++;
 528                     }
 529
 530                   /* We have found an enumerated type.  */
 531                   /* According to comments in read_enum_type
 532                      a comma could end it instead of a semicolon.
 533                      I don't know where that happens.
 534                      Accept either.  */
 535                   while (*p && *p != ';' && *p != ',')
 536                     {
 537                       char *q;
 538
 539                       /* Check for and handle cretinous dbx symbol name
 540                          continuation!  */
 541                       if (*p == '\\' || (*p == '?' && p[1] == '\0'))
 542                         p = next_symbol_text (objfile);
 543
 544                       /* Point to the character after the name
 545                          of the enum constant.  */
 546                       for (q = p; *q && *q != ':'; q++)
 547                         ;
 548                       /* Note that the value doesn't matter for
 549                          enum constants in psymtabs, just in symtabs.  */
 550                       add_psymbol_to_list (p, q - p,
 551                                            VAR_NAMESPACE, LOC_CONST,
 552                                            &objfile->static_psymbols, 0,
 553                                            0, psymtab_language, objfile);
 554                       /* Point past the name.  */
 555                       p = q;
 556                       /* Skip over the value.  */
 557                       while (*p && *p != ',')
 558                         p++;
 559                       /* Advance past the comma.  */
 560                       if (*p)
 561                         p++;
 562                     }
 563                 }
 564               continue;
 565             case 'c':
 566               /* Constant, e.g. from "const" in Pascal.  */
 567               add_psymbol_to_list (namestring, p - namestring,
 568                                    VAR_NAMESPACE, LOC_CONST,
 569                                    &objfile->static_psymbols, CUR_SYMBOL_VALUE,
 570                                    0, psymtab_language, objfile);
 571               continue;
 572
 573             case 'f':
 574               CUR_SYMBOL_VALUE += ANOFFSET (section_offsets, SECT_OFF_TEXT);
 575 #ifdef DBXREAD_ONLY
 576               /* Keep track of the start of the last function so we
 577                  can handle end of function symbols.  */
 578               last_function_start = CUR_SYMBOL_VALUE;
 579               /* Kludges for ELF/STABS with Sun ACC */
 580               last_function_name = namestring;
 581 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
 582               /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
 583                  value for the bottom of the text seg in those cases. */
 584               if (pst && textlow_not_set)
 585                 {
 586                   pst->textlow =
 587                     find_stab_function_addr (namestring, pst, objfile);
 588                   textlow_not_set = 0;
 589                 }
 590 #endif
 591               /* End kludge.  */
 592
 593               /* In reordered executables this function may lie outside
 594                  the bounds created by N_SO symbols.  If that's the case
 595                  use the address of this function as the low bound for
 596                  the partial symbol table.  */
 597               if (textlow_not_set
 598                   || (CUR_SYMBOL_VALUE < pst->textlow
 599                       && CUR_SYMBOL_VALUE
 600                            != ANOFFSET (section_offsets, SECT_OFF_TEXT)))
 601                 {
 602                   pst->textlow = CUR_SYMBOL_VALUE;
 603                   textlow_not_set = 0;
 604                 }
 605 #endif /* DBXREAD_ONLY */
 606               add_psymbol_to_list (namestring, p - namestring,
 607                                    VAR_NAMESPACE, LOC_BLOCK,
 608                                    &objfile->static_psymbols,
 609                                    0, CUR_SYMBOL_VALUE,
 610                                    psymtab_language, objfile);
 611               continue;
 612
 613               /* Global functions were ignored here, but now they
 614                  are put into the global psymtab like one would expect.
 615                  They're also in the minimal symbol table.  */
 616             case 'F':
 617               CUR_SYMBOL_VALUE += ANOFFSET (section_offsets, SECT_OFF_TEXT);
 618 #ifdef DBXREAD_ONLY
 619               /* Keep track of the start of the last function so we
 620                  can handle end of function symbols.  */
 621               last_function_start = CUR_SYMBOL_VALUE;
 622               /* Kludges for ELF/STABS with Sun ACC */
 623               last_function_name = namestring;
 624 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
 625               /* Do not fix textlow==0 for .o or NLM files, as 0 is a legit
 626                  value for the bottom of the text seg in those cases. */
 627               if (pst && textlow_not_set)
 628                 {
 629                   pst->textlow =
 630                     find_stab_function_addr (namestring, pst, objfile);
 631                   textlow_not_set = 0;
 632                 }
 633 #endif
 634               /* End kludge.  */
 635               /* In reordered executables this function may lie outside
 636                  the bounds created by N_SO symbols.  If that's the case
 637                  use the address of this function as the low bound for
 638                  the partial symbol table.  */
 639               if (textlow_not_set
 640                   || (CUR_SYMBOL_VALUE < pst->textlow
 641                       && CUR_SYMBOL_VALUE
 642                            != ANOFFSET (section_offsets, SECT_OFF_TEXT)))
 643                 {
 644                   pst->textlow = CUR_SYMBOL_VALUE;
 645                   textlow_not_set = 0;
 646                 }
 647 #endif /* DBXREAD_ONLY */
 648               add_psymbol_to_list (namestring, p - namestring,
 649                                    VAR_NAMESPACE, LOC_BLOCK,
 650                                    &objfile->global_psymbols,
 651                                    0, CUR_SYMBOL_VALUE,
 652                                    psymtab_language, objfile);
 653               continue;
 654
 655               /* Two things show up here (hopefully); static symbols of
 656                  local scope (static used inside braces) or extensions
 657                  of structure symbols.  We can ignore both.  */
 658             case 'V':
 659             case '(':
 660             case '0':
 661             case '1':
 662             case '2':
 663             case '3':
 664             case '4':
 665             case '5':
 666             case '6':
 667             case '7':
 668             case '8':
 669             case '9':
 670             case '-':
 671             case '#':   /* for symbol identification (used in live ranges) */
 672            /* added to support cfront stabs strings */
 673             case 'Z':   /* for definition continuations */
 674             case 'P':   /* for prototypes */
 675               continue;
 676
 677             case ':':
 678               /* It is a C++ nested symbol.  We don't need to record it
 679                  (I don't think); if we try to look up foo::bar::baz,
 680                  then symbols for the symtab containing foo should get
 681                  read in, I think.  */
 682               /* Someone says sun cc puts out symbols like
 683                  /foo/baz/maclib::/usr/local/bin/maclib,
 684                  which would get here with a symbol type of ':'.  */
 685               continue;
 686
 687             default:
 688               /* Unexpected symbol descriptor.  The second and subsequent stabs
 689                  of a continued stab can show up here.  The question is
 690                  whether they ever can mimic a normal stab--it would be
 691                  nice if not, since we certainly don't want to spend the
 692                  time searching to the end of every string looking for
 693                  a backslash.  */
 694
 695               complain (&unknown_symchar_complaint, p[1]);
 696
 697               /* Ignore it; perhaps it is an extension that we don't
 698                  know about.  */
 699               continue;
 700             }
 701
 702         case N_EXCL:
 703 #ifdef DBXREAD_ONLY
 704
 705           SET_NAMESTRING();
 706
 707           /* Find the corresponding bincl and mark that psymtab on the
 708              psymtab dependency list */
 709           {
 710             struct partial_symtab *needed_pst =
 711               find_corresponding_bincl_psymtab (namestring, CUR_SYMBOL_VALUE);
 712
 713             /* If this include file was defined earlier in this file,
 714                leave it alone.  */
 715             if (needed_pst == pst) continue;
 716
 717             if (needed_pst)
 718               {
 719                 int i;
 720                 int found = 0;
 721
 722                 for (i = 0; i < dependencies_used; i++)
 723                   if (dependency_list[i] == needed_pst)
 724                     {
 725                       found = 1;
 726                       break;
 727                     }
 728
 729                 /* If it's already in the list, skip the rest.  */
 730                 if (found) continue;
 731
 732                 dependency_list[dependencies_used++] = needed_pst;
 733                 if (dependencies_used >= dependencies_allocated)
 734                   {
 735                     struct partial_symtab **orig = dependency_list;
 736                     dependency_list =
 737                       (struct partial_symtab **)
 738                         alloca ((dependencies_allocated *= 2)
 739                                 * sizeof (struct partial_symtab *));
 740                     memcpy ((PTR)dependency_list, (PTR)orig,
 741                            (dependencies_used
 742                             * sizeof (struct partial_symtab *)));
 743 #ifdef DEBUG_INFO
 744                     fprintf_unfiltered (gdb_stderr, "Had to reallocate dependency list.\n");
 745                     fprintf_unfiltered (gdb_stderr, "New dependencies allocated: %d\n",
 746                              dependencies_allocated);
 747 #endif
 748                   }
 749               }
 750           }
 751 #endif /* DBXREAD_ONLY */
 752           continue;
 753
 754         case N_ENDM:
 755 #ifdef SOFUN_ADDRESS_MAYBE_MISSING
 756           /* Solaris 2 end of module, finish current partial symbol table.
 757              END_PSYMTAB will set pst->texthigh to the proper value, which
 758              is necessary if a module compiled without debugging info
 759              follows this module.  */
 760           if (pst)
 761             {
 762               END_PSYMTAB (pst, psymtab_include_list, includes_used,
 763                            symnum * symbol_size,
 764                            (CORE_ADDR) 0,
 765                            dependency_list, dependencies_used, textlow_not_set);
 766               pst = (struct partial_symtab *) 0;
 767               includes_used = 0;
 768               dependencies_used = 0;
 769             }
 770 #endif
 771           continue;
 772
 773         case N_RBRAC:
 774 #ifdef HANDLE_RBRAC
 775           HANDLE_RBRAC(CUR_SYMBOL_VALUE);
 776           continue;
 777 #endif
 778         case N_EINCL:
 779         case N_DSLINE:
 780         case N_BSLINE:
 781         case N_SSYM:            /* Claim: Structure or union element.
 782                                    Hopefully, I can ignore this.  */
 783         case N_ENTRY:           /* Alternate entry point; can ignore. */
 784         case N_MAIN:            /* Can definitely ignore this.   */
 785         case N_CATCH:           /* These are GNU C++ extensions */
 786         case N_EHDECL:          /* that can safely be ignored here. */
 787         case N_LENG:
 788         case N_BCOMM:
 789         case N_ECOMM:
 790         case N_ECOML:
 791         case N_FNAME:
 792         case N_SLINE:
 793         case N_RSYM:
 794         case N_PSYM:
 795         case N_LBRAC:
 796         case N_NSYMS:           /* Ultrix 4.0: symbol count */
 797         case N_DEFD:            /* GNU Modula-2 */
 798         case N_ALIAS:           /* SunPro F77: alias name, ignore for now.  */
 799
 800         case N_OBJ:             /* useless types from Solaris */
 801         case N_OPT:
 802           /* These symbols aren't interesting; don't worry about them */
 803
 804           continue;
 805
 806         default:
 807           /* If we haven't found it yet, ignore it.  It's probably some
 808              new type we don't know about yet.  */
 809           complain (&unknown_symtype_complaint,
 810                     local_hex_string (CUR_SYMBOL_TYPE));
 811           continue;
 812         }