ld/ldmisc.c

   1 /* ldmisc.c
   2    Copyright (C) 1991, 92, 93, 94, 95, 96, 97, 98, 99, 2000
   3    Free Software Foundation, Inc.
   4    Written by Steve Chamberlain of Cygnus Support.
   5
   6 This file is part of GLD, the Gnu Linker.
   7
   8 GLD is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 2, or (at your option)
  11 any later version.
  12
  13 GLD is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GLD; see the file COPYING.  If not, write to the Free
  20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  21 02111-1307, USA.  */
  22
  23 #include "bfd.h"
  24 #include "sysdep.h"
  25 #include "libiberty.h"
  26 #include "demangle.h"
  27
  28 #ifdef ANSI_PROTOTYPES
  29 #include <stdarg.h>
  30 #define USE_STDARG 1
  31 #else
  32 #include <varargs.h>
  33 #define USE_STDARG 0
  34 #endif
  35
  36 #include "ld.h"
  37 #include "ldmisc.h"
  38 #include "ldexp.h"
  39 #include "ldlang.h"
  40 #include "ldgram.h"
  41 #include "ldlex.h"
  42 #include "ldmain.h"
  43 #include "ldfile.h"
  44
  45 static void vfinfo PARAMS ((FILE *, const char *, va_list));
  46
  47 /*
  48  %% literal %
  49  %F error is fatal
  50  %P print program name
  51  %S print script file and linenumber
  52  %E current bfd error or errno
  53  %I filename from a lang_input_statement_type
  54  %B filename from a bfd
  55  %T symbol name
  56  %X no object output, fail return
  57  %V hex bfd_vma
  58  %v hex bfd_vma, no leading zeros
  59  %W hex bfd_vma with 0x with no leading zeros taking up 8 spaces
  60  %C clever filename:linenumber with function
  61  %D like %C, but no function name
  62  %G like %D, but only function name
  63  %R info about a relent
  64  %s arbitrary string, like printf
  65  %d integer, like printf
  66  %u integer, like printf
  67 */
  68
  69 char *
  70 demangle (string)
  71      const char *string;
  72 {
  73   char *res;
  74
  75   if (output_bfd != NULL
  76       && bfd_get_symbol_leading_char (output_bfd) == string[0])
  77     ++string;
  78
  79   /* This is a hack for better error reporting on XCOFF, or the MS PE
  80      format.  Xcoff has a single '.', while the NT PE for PPC has
  81      '..'.  So we remove all of them.  */
  82   while (string[0] == '.')
  83     ++string;
  84
  85   res = cplus_demangle (string, DMGL_ANSI | DMGL_PARAMS);
  86   return res ? res : xstrdup (string);
  87 }
  88
  89 static void
  90 vfinfo (fp, fmt, arg)
  91      FILE *fp;
  92      const char *fmt;
  93      va_list arg;
  94 {
  95   boolean fatal = false;
  96
  97   while (*fmt != '\0')
  98     {
  99       while (*fmt != '%' && *fmt != '\0')
 100         {
 101           putc (*fmt, fp);
 102           fmt++;
 103         }
 104
 105       if (*fmt == '%')
 106         {
 107           fmt++;
 108           switch (*fmt++)
 109             {
 110             default:
 111               fprintf (fp, "%%%c", fmt[-1]);
 112               break;
 113
 114             case '%':
 115               /* literal % */
 116               putc ('%', fp);
 117               break;
 118
 119             case 'X':
 120               /* no object output, fail return */
 121               config.make_executable = false;
 122               break;
 123
 124             case 'V':
 125               /* hex bfd_vma */
 126               {
 127                 bfd_vma value = va_arg (arg, bfd_vma);
 128                 fprintf_vma (fp, value);
 129               }
 130               break;
 131
 132             case 'v':
 133               /* hex bfd_vma, no leading zeros */
 134               {
 135                 char buf[100];
 136                 char *p = buf;
 137                 bfd_vma value = va_arg (arg, bfd_vma);
 138                 sprintf_vma (p, value);
 139                 while (*p == '0')
 140                   p++;
 141                 if (!*p)
 142                   p--;
 143                 fputs (p, fp);
 144               }
 145               break;
 146
 147             case 'W':
 148               /* hex bfd_vma with 0x with no leading zeroes taking up
 149                  8 spaces.  */
 150               {
 151                 char buf[100];
 152                 bfd_vma value;
 153                 char *p;
 154                 int len;
 155
 156                 value = va_arg (arg, bfd_vma);
 157                 sprintf_vma (buf, value);
 158                 for (p = buf; *p == '0'; ++p)
 159                   ;
 160                 if (*p == '\0')
 161                   --p;
 162                 len = strlen (p);
 163                 while (len < 8)
 164                   {
 165                     putc (' ', fp);
 166                     ++len;
 167                   }
 168                 fprintf (fp, "0x%s", p);
 169               }
 170               break;
 171
 172             case 'T':
 173               /* Symbol name.  */
 174               {
 175                 const char *name = va_arg (arg, const char *);
 176
 177                 if (name == (const char *) NULL || *name == 0)
 178                   fprintf (fp, _("no symbol"));
 179                 else if (! demangling)
 180                   fprintf (fp, "%s", name);
 181                 else
 182                   {
 183                     char *demangled;
 184
 185                     demangled = demangle (name);
 186                     fprintf (fp, "%s", demangled);
 187                     free (demangled);
 188                   }
 189               }
 190               break;
 191
 192             case 'B':
 193               /* filename from a bfd */
 194               {
 195                 bfd *abfd = va_arg (arg, bfd *);
 196                 if (abfd->my_archive)
 197                   fprintf (fp, "%s(%s)", abfd->my_archive->filename,
 198                            abfd->filename);
 199                 else
 200                   fprintf (fp, "%s", abfd->filename);
 201               }
 202               break;
 203
 204             case 'F':
 205               /* Error is fatal.  */
 206               fatal = true;
 207               break;
 208
 209             case 'P':
 210               /* Print program name.  */
 211               fprintf (fp, "%s", program_name);
 212               break;
 213
 214             case 'E':
 215               /* current bfd error or errno */
 216               fprintf (fp, "%s", bfd_errmsg (bfd_get_error ()));
 217               break;
 218
 219             case 'I':
 220               /* filename from a lang_input_statement_type */
 221               {
 222                 lang_input_statement_type *i;
 223
 224                 i = va_arg (arg, lang_input_statement_type *);
 225                 if (bfd_my_archive (i->the_bfd) != NULL)
 226                   fprintf (fp, "(%s)",
 227                            bfd_get_filename (bfd_my_archive (i->the_bfd)));
 228                 fprintf (fp, "%s", i->local_sym_name);
 229                 if (bfd_my_archive (i->the_bfd) == NULL
 230                     && strcmp (i->local_sym_name, i->filename) != 0)
 231                   fprintf (fp, " (%s)", i->filename);
 232               }
 233               break;
 234
 235             case 'S':
 236               /* Print script file and linenumber.  */
 237               if (parsing_defsym)
 238                 fprintf (fp, "--defsym %s", lex_string);
 239               else if (ldfile_input_filename != NULL)
 240                 fprintf (fp, "%s:%u", ldfile_input_filename, lineno);
 241               else
 242                 fprintf (fp, _("built in linker script:%u"), lineno);
 243               break;
 244
 245             case 'R':
 246               /* Print all that's interesting about a relent.  */
 247               {
 248                 arelent *relent = va_arg (arg, arelent *);
 249
 250                 lfinfo (fp, "%s+0x%v (type %s)",
 251                         (*(relent->sym_ptr_ptr))->name,
 252                         relent->addend,
 253                         relent->howto->name);
 254               }
 255               break;
 256
 257             case 'C':
 258             case 'D':
 259             case 'G':
 260               /* Clever filename:linenumber with function name if possible,
 261                  or section name as a last resort.  The arguments are a BFD,
 262                  a section, and an offset.  */
 263               {
 264                 static bfd *last_bfd;
 265                 static char *last_file = NULL;
 266                 static char *last_function = NULL;
 267                 bfd *abfd;
 268                 asection *section;
 269                 bfd_vma offset;
 270                 lang_input_statement_type *entry;
 271                 asymbol **asymbols;
 272                 const char *filename;
 273                 const char *functionname;
 274                 unsigned int linenumber;
 275                 boolean discard_last;
 276
 277                 abfd = va_arg (arg, bfd *);
 278                 section = va_arg (arg, asection *);
 279                 offset = va_arg (arg, bfd_vma);
 280
 281                 entry = (lang_input_statement_type *) abfd->usrdata;
 282                 if (entry != (lang_input_statement_type *) NULL
 283                     && entry->asymbols != (asymbol **) NULL)
 284                   asymbols = entry->asymbols;
 285                 else
 286                   {
 287                     long symsize;
 288                     long symbol_count;
 289
 290                     symsize = bfd_get_symtab_upper_bound (abfd);
 291                     if (symsize < 0)
 292                       einfo (_("%B%F: could not read symbols\n"), abfd);
 293                     asymbols = (asymbol **) xmalloc (symsize);
 294                     symbol_count = bfd_canonicalize_symtab (abfd, asymbols);
 295                     if (symbol_count < 0)
 296                       einfo (_("%B%F: could not read symbols\n"), abfd);
 297                     if (entry != (lang_input_statement_type *) NULL)
 298                       {
 299                         entry->asymbols = asymbols;
 300                         entry->symbol_count = symbol_count;
 301                       }
 302                   }
 303
 304                 discard_last = true;
 305                 if (bfd_find_nearest_line (abfd, section, asymbols, offset,
 306                                            &filename, &functionname,
 307                                            &linenumber))
 308                   {
 309                     if (functionname != NULL && fmt[-1] == 'G')
 310                       {
 311                         lfinfo (fp, "%B:", abfd);
 312                         if (filename != NULL
 313                             && strcmp (filename, bfd_get_filename (abfd)) != 0)
 314                           fprintf (fp, "%s:", filename);
 315                         lfinfo (fp, "%T", functionname);
 316                       }
 317                     else if (functionname != NULL && fmt[-1] == 'C')
 318                       {
 319                         if (filename == (char *) NULL)
 320                           filename = abfd->filename;
 321
 322                         if (last_bfd == NULL
 323                             || last_file == NULL
 324                             || last_function == NULL
 325                             || last_bfd != abfd
 326                             || strcmp (last_file, filename) != 0
 327                             || strcmp (last_function, functionname) != 0)
 328                           {
 329                             /* We use abfd->filename in this initial line,
 330                                in case filename is a .h file or something
 331                                similarly unhelpful.  */
 332                             lfinfo (fp, _("%B: In function `%T':\n"),
 333                                     abfd, functionname);
 334
 335                             last_bfd = abfd;
 336                             if (last_file != NULL)
 337                               free (last_file);
 338                             last_file = buystring (filename);
 339                             if (last_function != NULL)
 340                               free (last_function);
 341                             last_function = buystring (functionname);
 342                           }
 343                         discard_last = false;
 344                         if (linenumber != 0)
 345                           fprintf (fp, "%s:%u", filename, linenumber);
 346                         else
 347                           lfinfo (fp, "%s(%s+0x%v)", filename, section->name,
 348                                   offset);
 349                       }
 350                     else if (filename == NULL
 351                              || strcmp (filename, abfd->filename) == 0)
 352                       {
 353                         lfinfo (fp, "%B(%s+0x%v)", abfd, section->name,
 354                                 offset);
 355                         if (linenumber != 0)
 356                           lfinfo (fp, ":%u", linenumber);
 357                       }
 358                     else if (linenumber != 0)
 359                       lfinfo (fp, "%B:%s:%u", abfd, filename, linenumber);
 360                     else
 361                       lfinfo (fp, "%B(%s+0x%v):%s", abfd, section->name,
 362                               offset, filename);
 363                   }
 364                 else
 365                   lfinfo (fp, "%B(%s+0x%v)", abfd, section->name, offset);
 366
 367                 if (discard_last)
 368                   {
 369                     last_bfd = NULL;
 370                     if (last_file != NULL)
 371                       {
 372                         free (last_file);
 373                         last_file = NULL;
 374                       }
 375                     if (last_function != NULL)
 376                       {
 377                         free (last_function);
 378                         last_function = NULL;
 379                       }
 380                   }
 381               }
 382               break;
 383
 384             case 's':
 385               /* arbitrary string, like printf */
 386               fprintf (fp, "%s", va_arg (arg, char *));
 387               break;
 388
 389             case 'd':
 390               /* integer, like printf */
 391               fprintf (fp, "%d", va_arg (arg, int));
 392               break;
 393
 394             case 'u':
 395               /* unsigned integer, like printf */
 396               fprintf (fp, "%u", va_arg (arg, unsigned int));
 397               break;
 398             }
 399         }
 400     }
 401
 402   if (fatal == true)
 403     xexit (1);
 404 }
 405
 406 /* Format info message and print on stdout.  */
 407
 408 /* (You would think this should be called just "info", but then you
 409    would hosed by LynxOS, which defines that name in its libc.)  */
 410
 411 void
 412 #if USE_STDARG
 413 info_msg (const char *fmt, ...)
 414 #else
 415 info_msg (va_alist)
 416      va_dcl
 417 #endif
 418 {
 419   va_list arg;
 420
 421 #if ! USE_STDARG
 422   const char *fmt;
 423
 424   va_start (arg);
 425   fmt = va_arg (arg, const char *);
 426 #else
 427   va_start (arg, fmt);
 428 #endif
 429
 430   vfinfo (stdout, fmt, arg);
 431   va_end (arg);
 432 }
 433
 434 /* ('e' for error.) Format info message and print on stderr.  */
 435
 436 void
 437 #if USE_STDARG
 438 einfo (const char *fmt, ...)
 439 #else
 440 einfo (va_alist)
 441      va_dcl
 442 #endif
 443 {
 444   va_list arg;
 445
 446 #if ! USE_STDARG
 447   const char *fmt;
 448
 449   va_start (arg);
 450   fmt = va_arg (arg, const char *);
 451 #else
 452   va_start (arg, fmt);
 453 #endif
 454
 455   vfinfo (stderr, fmt, arg);
 456   va_end (arg);
 457 }
 458
 459 void
 460 info_assert (file, line)
 461      const char *file;
 462      unsigned int line;
 463 {
 464   einfo (_("%F%P: internal error %s %d\n"), file, line);
 465 }
 466
 467 char *
 468 buystring (x)
 469      CONST char *CONST x;
 470 {
 471   size_t l = strlen (x) + 1;
 472   char *r = xmalloc (l);
 473   memcpy (r, x, l);
 474   return r;
 475 }
 476
 477 /* ('m' for map) Format info message and print on map.  */
 478
 479 void
 480 #if USE_STDARG
 481 minfo (const char *fmt, ...)
 482 #else
 483 minfo (va_alist)
 484      va_dcl
 485 #endif
 486 {
 487   va_list arg;
 488
 489 #if ! USE_STDARG
 490   const char *fmt;
 491   va_start (arg);
 492   fmt = va_arg (arg, const char *);
 493 #else
 494   va_start (arg, fmt);
 495 #endif
 496
 497   vfinfo (config.map_file, fmt, arg);
 498   va_end (arg);
 499 }
 500
 501 void
 502 #if USE_STDARG
 503 lfinfo (FILE *file, const char *fmt, ...)
 504 #else
 505 lfinfo (va_alist)
 506      va_dcl
 507 #endif
 508 {
 509   va_list arg;
 510
 511 #if ! USE_STDARG
 512   FILE *file;
 513   const char *fmt;
 514
 515   va_start (arg);
 516   file = va_arg (arg, FILE *);
 517   fmt = va_arg (arg, const char *);
 518 #else
 519   va_start (arg, fmt);
 520 #endif
 521
 522   vfinfo (file, fmt, arg);
 523   va_end (arg);
 524 }
 525 \f
 526 /* Functions to print the link map.  */
 527
 528 void
 529 print_space ()
 530 {
 531   fprintf (config.map_file, " ");
 532 }
 533
 534 void
 535 print_nl ()
 536 {
 537   fprintf (config.map_file, "\n");
 538 }
 539
 540 /* A more or less friendly abort message.  In ld.h abort is defined to
 541    call this function.  */
 542
 543 void
 544 ld_abort (file, line, fn)
 545      const char *file;
 546      int line;
 547      const char *fn;
 548 {
 549   if (fn != NULL)
 550     einfo (_("%P: internal error: aborting at %s line %d in %s\n"),
 551            file, line, fn);
 552   else
 553     einfo (_("%P: internal error: aborting at %s line %d\n"),
 554            file, line);
 555   einfo (_("%P%F: please report this bug\n"));
 556   xexit (1);
 557 }