ld/ldmisc.c

   1 /* ldmisc.c
   2    Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
   3    2000, 2002, 2003
   4    Free Software Foundation, Inc.
   5    Written by Steve Chamberlain of Cygnus Support.
   6
   7    This file is part of GLD, the Gnu Linker.
   8
   9    GLD is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2, or (at your option)
  12    any later version.
  13
  14    GLD is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with GLD; see the file COPYING.  If not, write to the Free
  21    Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  22    02111-1307, USA.  */
  23
  24 #include "bfd.h"
  25 #include "bfdlink.h"
  26 #include "sysdep.h"
  27 #include "libiberty.h"
  28 #include "demangle.h"
  29 #include <stdarg.h>
  30 #include "ld.h"
  31 #include "ldmisc.h"
  32 #include "ldexp.h"
  33 #include "ldlang.h"
  34 #include <ldgram.h>
  35 #include "ldlex.h"
  36 #include "ldmain.h"
  37 #include "ldfile.h"
  38
  39 /*
  40  %% literal %
  41  %F error is fatal
  42  %P print program name
  43  %S print script file and linenumber
  44  %E current bfd error or errno
  45  %I filename from a lang_input_statement_type
  46  %B filename from a bfd
  47  %T symbol name
  48  %X no object output, fail return
  49  %V hex bfd_vma
  50  %v hex bfd_vma, no leading zeros
  51  %W hex bfd_vma with 0x with no leading zeros taking up 8 spaces
  52  %C clever filename:linenumber with function
  53  %D like %C, but no function name
  54  %G like %D, but only function name
  55  %R info about a relent
  56  %s arbitrary string, like printf
  57  %d integer, like printf
  58  %u integer, like printf
  59 */
  60
  61 static void
  62 vfinfo (FILE *fp, const char *fmt, va_list arg)
  63 {
  64   bfd_boolean fatal = FALSE;
  65
  66   while (*fmt != '\0')
  67     {
  68       while (*fmt != '%' && *fmt != '\0')
  69         {
  70           putc (*fmt, fp);
  71           fmt++;
  72         }
  73
  74       if (*fmt == '%')
  75         {
  76           fmt++;
  77           switch (*fmt++)
  78             {
  79             default:
  80               fprintf (fp, "%%%c", fmt[-1]);
  81               break;
  82
  83             case '%':
  84               /* literal % */
  85               putc ('%', fp);
  86               break;
  87
  88             case 'X':
  89               /* no object output, fail return */
  90               config.make_executable = FALSE;
  91               break;
  92
  93             case 'V':
  94               /* hex bfd_vma */
  95               {
  96                 bfd_vma value = va_arg (arg, bfd_vma);
  97                 fprintf_vma (fp, value);
  98               }
  99               break;
 100
 101             case 'v':
 102               /* hex bfd_vma, no leading zeros */
 103               {
 104                 char buf[100];
 105                 char *p = buf;
 106                 bfd_vma value = va_arg (arg, bfd_vma);
 107                 sprintf_vma (p, value);
 108                 while (*p == '0')
 109                   p++;
 110                 if (!*p)
 111                   p--;
 112                 fputs (p, fp);
 113               }
 114               break;
 115
 116             case 'W':
 117               /* hex bfd_vma with 0x with no leading zeroes taking up
 118                  8 spaces.  */
 119               {
 120                 char buf[100];
 121                 bfd_vma value;
 122                 char *p;
 123                 int len;
 124
 125                 value = va_arg (arg, bfd_vma);
 126                 sprintf_vma (buf, value);
 127                 for (p = buf; *p == '0'; ++p)
 128                   ;
 129                 if (*p == '\0')
 130                   --p;
 131                 len = strlen (p);
 132                 while (len < 8)
 133                   {
 134                     putc (' ', fp);
 135                     ++len;
 136                   }
 137                 fprintf (fp, "0x%s", p);
 138               }
 139               break;
 140
 141             case 'T':
 142               /* Symbol name.  */
 143               {
 144                 const char *name = va_arg (arg, const char *);
 145
 146                 if (name == NULL || *name == 0)
 147                   fprintf (fp, _("no symbol"));
 148                 else if (! demangling)
 149                   fprintf (fp, "%s", name);
 150                 else
 151                   {
 152                     char *demangled;
 153
 154                     demangled = demangle (name);
 155                     fprintf (fp, "%s", demangled);
 156                     free (demangled);
 157                   }
 158               }
 159               break;
 160
 161             case 'B':
 162               /* filename from a bfd */
 163               {
 164                 bfd *abfd = va_arg (arg, bfd *);
 165                 if (abfd->my_archive)
 166                   fprintf (fp, "%s(%s)", abfd->my_archive->filename,
 167                            abfd->filename);
 168                 else
 169                   fprintf (fp, "%s", abfd->filename);
 170               }
 171               break;
 172
 173             case 'F':
 174               /* Error is fatal.  */
 175               fatal = TRUE;
 176               break;
 177
 178             case 'P':
 179               /* Print program name.  */
 180               fprintf (fp, "%s", program_name);
 181               break;
 182
 183             case 'E':
 184               /* current bfd error or errno */
 185               fprintf (fp, "%s", bfd_errmsg (bfd_get_error ()));
 186               break;
 187
 188             case 'I':
 189               /* filename from a lang_input_statement_type */
 190               {
 191                 lang_input_statement_type *i;
 192
 193                 i = va_arg (arg, lang_input_statement_type *);
 194                 if (bfd_my_archive (i->the_bfd) != NULL)
 195                   fprintf (fp, "(%s)",
 196                            bfd_get_filename (bfd_my_archive (i->the_bfd)));
 197                 fprintf (fp, "%s", i->local_sym_name);
 198                 if (bfd_my_archive (i->the_bfd) == NULL
 199                     && strcmp (i->local_sym_name, i->filename) != 0)
 200                   fprintf (fp, " (%s)", i->filename);
 201               }
 202               break;
 203
 204             case 'S':
 205               /* Print script file and linenumber.  */
 206               if (parsing_defsym)
 207                 fprintf (fp, "--defsym %s", lex_string);
 208               else if (ldfile_input_filename != NULL)
 209                 fprintf (fp, "%s:%u", ldfile_input_filename, lineno);
 210               else
 211                 fprintf (fp, _("built in linker script:%u"), lineno);
 212               break;
 213
 214             case 'R':
 215               /* Print all that's interesting about a relent.  */
 216               {
 217                 arelent *relent = va_arg (arg, arelent *);
 218
 219                 lfinfo (fp, "%s+0x%v (type %s)",
 220                         (*(relent->sym_ptr_ptr))->name,
 221                         relent->addend,
 222                         relent->howto->name);
 223               }
 224               break;
 225
 226             case 'C':
 227             case 'D':
 228             case 'G':
 229               /* Clever filename:linenumber with function name if possible.
 230                  The arguments are a BFD, a section, and an offset.  */
 231               {
 232                 static bfd *last_bfd;
 233                 static char *last_file = NULL;
 234                 static char *last_function = NULL;
 235                 bfd *abfd;
 236                 asection *section;
 237                 bfd_vma offset;
 238                 lang_input_statement_type *entry;
 239                 asymbol **asymbols;
 240                 const char *filename;
 241                 const char *functionname;
 242                 unsigned int linenumber;
 243                 bfd_boolean discard_last;
 244
 245                 abfd = va_arg (arg, bfd *);
 246                 section = va_arg (arg, asection *);
 247                 offset = va_arg (arg, bfd_vma);
 248
 249                 entry = (lang_input_statement_type *) abfd->usrdata;
 250                 if (entry != (lang_input_statement_type *) NULL
 251                     && entry->asymbols != (asymbol **) NULL)
 252                   asymbols = entry->asymbols;
 253                 else
 254                   {
 255                     long symsize;
 256                     long symbol_count;
 257
 258                     symsize = bfd_get_symtab_upper_bound (abfd);
 259                     if (symsize < 0)
 260                       einfo (_("%B%F: could not read symbols\n"), abfd);
 261                     asymbols = xmalloc (symsize);
 262                     symbol_count = bfd_canonicalize_symtab (abfd, asymbols);
 263                     if (symbol_count < 0)
 264                       einfo (_("%B%F: could not read symbols\n"), abfd);
 265                     if (entry != (lang_input_statement_type *) NULL)
 266                       {
 267                         entry->asymbols = asymbols;
 268                         entry->symbol_count = symbol_count;
 269                       }
 270                   }
 271
 272                 lfinfo (fp, "%B(%s+0x%v)", abfd, section->name, offset);
 273
 274                 discard_last = TRUE;
 275                 if (bfd_find_nearest_line (abfd, section, asymbols, offset,
 276                                            &filename, &functionname,
 277                                            &linenumber))
 278                   {
 279                     bfd_boolean need_colon = TRUE;
 280
 281                     if (functionname != NULL && fmt[-1] == 'C')
 282                       {
 283                         if (last_bfd == NULL
 284                             || last_file == NULL
 285                             || last_function == NULL
 286                             || last_bfd != abfd
 287                             || (filename != NULL
 288                                 && strcmp (last_file, filename) != 0)
 289                             || strcmp (last_function, functionname) != 0)
 290                           {
 291                             lfinfo (fp, _(": In function `%T':\n"),
 292                                     functionname);
 293                             need_colon = FALSE;
 294
 295                             last_bfd = abfd;
 296                             if (last_file != NULL)
 297                               free (last_file);
 298                             last_file = NULL;
 299                             if (filename)
 300                               last_file = xstrdup (filename);
 301                             if (last_function != NULL)
 302                               free (last_function);
 303                             last_function = xstrdup (functionname);
 304                           }
 305                         discard_last = FALSE;
 306                       }
 307
 308                     if (filename != NULL)
 309                       {
 310                         if (need_colon)
 311                           putc (':', fp);
 312                         fputs (filename, fp);
 313                       }
 314
 315                     if (functionname != NULL && fmt[-1] == 'G')
 316                       lfinfo (fp, ":%T", functionname);
 317                     else if (filename != NULL && linenumber != 0)
 318                       fprintf (fp, ":%u", linenumber);
 319                   }
 320
 321                 if (asymbols != NULL && entry == NULL)
 322                   free (asymbols);
 323
 324                 if (discard_last)
 325                   {
 326                     last_bfd = NULL;
 327                     if (last_file != NULL)
 328                       {
 329                         free (last_file);
 330                         last_file = NULL;
 331                       }
 332                     if (last_function != NULL)
 333                       {
 334                         free (last_function);
 335                         last_function = NULL;
 336                       }
 337                   }
 338               }
 339               break;
 340
 341             case 's':
 342               /* arbitrary string, like printf */
 343               fprintf (fp, "%s", va_arg (arg, char *));
 344               break;
 345
 346             case 'd':
 347               /* integer, like printf */
 348               fprintf (fp, "%d", va_arg (arg, int));
 349               break;
 350
 351             case 'u':
 352               /* unsigned integer, like printf */
 353               fprintf (fp, "%u", va_arg (arg, unsigned int));
 354               break;
 355             }
 356         }
 357     }
 358
 359   if (config.fatal_warnings)
 360     config.make_executable = FALSE;
 361
 362   if (fatal)
 363     xexit (1);
 364 }
 365
 366 /* Wrapper around cplus_demangle.  Strips leading underscores and
 367    other such chars that would otherwise confuse the demangler.  */
 368
 369 char *
 370 demangle (const char *name)
 371 {
 372   char *res;
 373   const char *p;
 374
 375   if (output_bfd != NULL
 376       && bfd_get_symbol_leading_char (output_bfd) == name[0])
 377     ++name;
 378
 379   /* This is a hack for better error reporting on XCOFF, PowerPC64-ELF
 380      or the MS PE format.  These formats have a number of leading '.'s
 381      on at least some symbols, so we remove all dots to avoid
 382      confusing the demangler.  */
 383   p = name;
 384   while (*p == '.')
 385     ++p;
 386
 387   res = cplus_demangle (p, DMGL_ANSI | DMGL_PARAMS);
 388   if (res)
 389     {
 390       size_t dots = p - name;
 391
 392       /* Now put back any stripped dots.  */
 393       if (dots != 0)
 394         {
 395           size_t len = strlen (res) + 1;
 396           char *add_dots = xmalloc (len + dots);
 397
 398           memcpy (add_dots, name, dots);
 399           memcpy (add_dots + dots, res, len);
 400           free (res);
 401           res = add_dots;
 402         }
 403       return res;
 404     }
 405   return xstrdup (name);
 406 }
 407
 408 /* Format info message and print on stdout.  */
 409
 410 /* (You would think this should be called just "info", but then you
 411    would be hosed by LynxOS, which defines that name in its libc.)  */
 412
 413 void
 414 info_msg (const char *fmt, ...)
 415 {
 416   va_list arg;
 417
 418   va_start (arg, fmt);
 419   vfinfo (stdout, fmt, arg);
 420   va_end (arg);
 421 }
 422
 423 /* ('e' for error.) Format info message and print on stderr.  */
 424
 425 void
 426 einfo (const char *fmt, ...)
 427 {
 428   va_list arg;
 429
 430   va_start (arg, fmt);
 431   vfinfo (stderr, fmt, arg);
 432   va_end (arg);
 433 }
 434
 435 void
 436 info_assert (const char *file, unsigned int line)
 437 {
 438   einfo (_("%F%P: internal error %s %d\n"), file, line);
 439 }
 440
 441 /* ('m' for map) Format info message and print on map.  */
 442
 443 void
 444 minfo (const char *fmt, ...)
 445 {
 446   va_list arg;
 447
 448   va_start (arg, fmt);
 449   vfinfo (config.map_file, fmt, arg);
 450   va_end (arg);
 451 }
 452
 453 void
 454 lfinfo (FILE *file, const char *fmt, ...)
 455 {
 456   va_list arg;
 457
 458   va_start (arg, fmt);
 459   vfinfo (file, fmt, arg);
 460   va_end (arg);
 461 }
 462 \f
 463 /* Functions to print the link map.  */
 464
 465 void
 466 print_space (void)
 467 {
 468   fprintf (config.map_file, " ");
 469 }
 470
 471 void
 472 print_nl (void)
 473 {
 474   fprintf (config.map_file, "\n");
 475 }
 476
 477 /* A more or less friendly abort message.  In ld.h abort is defined to
 478    call this function.  */
 479
 480 void
 481 ld_abort (const char *file, int line, const char *fn)
 482 {
 483   if (fn != NULL)
 484     einfo (_("%P: internal error: aborting at %s line %d in %s\n"),
 485            file, line, fn);
 486   else
 487     einfo (_("%P: internal error: aborting at %s line %d\n"),
 488            file, line);
 489   einfo (_("%P%F: please report this bug\n"));
 490   xexit (1);
 491 }
 492
 493 bfd_boolean
 494 error_handler (int id, const char *fmt, ...)
 495 {
 496   va_list arg;
 497
 498   va_start (arg, fmt);
 499
 500   switch (id)
 501     {
 502     default:
 503       break;
 504
 505     /* We can be called with
 506
 507         error_handler (-LD_DEFINITION_IN_DISCARDED_SECTION, "", 0);
 508
 509         to make this error non-fatal and
 510
 511         error_handler (-LD_DEFINITION_IN_DISCARDED_SECTION, "", 1);
 512
 513         to make this error fatal.  */
 514     case -LD_DEFINITION_IN_DISCARDED_SECTION:
 515     case LD_DEFINITION_IN_DISCARDED_SECTION:
 516       {
 517         static struct bfd_hash_table *hash;
 518         static int fatal = 1;
 519         const char *name;
 520
 521         if (id == -LD_DEFINITION_IN_DISCARDED_SECTION)
 522           {
 523             fatal = va_arg (arg, int);
 524             goto out;
 525           }
 526
 527         name = va_arg (arg, const char *);
 528         /* Only warn once about a particular undefined symbol.  */
 529         if (hash == NULL)
 530           {
 531             hash = xmalloc (sizeof (struct bfd_hash_table));
 532             if (! bfd_hash_table_init (hash, bfd_hash_newfunc))
 533               einfo (_("%F%P: bfd_hash_table_init failed: %E\n"));
 534           }
 535
 536         if (bfd_hash_lookup (hash, name, FALSE, FALSE) != NULL)
 537           goto out;
 538
 539         if (bfd_hash_lookup (hash, name, TRUE, TRUE) == NULL)
 540           einfo (_("%F%P: bfd_hash_lookup failed: %E\n"));
 541
 542         if (fatal)
 543           config.make_executable = FALSE;
 544       }
 545       break;
 546     }
 547   vfinfo (stderr, fmt, arg);
 548
 549 out:
 550   va_end (arg);
 551   return TRUE;
 552 }