| 1 | /* ldmisc.c |
| 2 | Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, |
| 3 | 2001, 2002, 2003, 2004, 2005 |
| 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, 51 Franklin Street - Fifth Floor, Boston, MA |
| 22 | 02110-1301, 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 | #include "elf-bfd.h" |
| 39 | |
| 40 | /* |
| 41 | %% literal % |
| 42 | %A section name from a section |
| 43 | %B filename from a bfd |
| 44 | %C clever filename:linenumber with function |
| 45 | %D like %C, but no function name |
| 46 | %E current bfd error or errno |
| 47 | %F error is fatal |
| 48 | %G like %D, but only function name |
| 49 | %I filename from a lang_input_statement_type |
| 50 | %P print program name |
| 51 | %R info about a relent |
| 52 | %S print script file and linenumber |
| 53 | %T symbol name |
| 54 | %V hex bfd_vma |
| 55 | %W hex bfd_vma with 0x with no leading zeros taking up 8 spaces |
| 56 | %X no object output, fail return |
| 57 | %d integer, like printf |
| 58 | %ld long, like printf |
| 59 | %lu unsigned long, like printf |
| 60 | %s arbitrary string, like printf |
| 61 | %u integer, like printf |
| 62 | %v hex bfd_vma, no leading zeros |
| 63 | */ |
| 64 | |
| 65 | static void |
| 66 | vfinfo (FILE *fp, const char *fmt, va_list arg, bfd_boolean is_warning) |
| 67 | { |
| 68 | bfd_boolean fatal = FALSE; |
| 69 | |
| 70 | while (*fmt != '\0') |
| 71 | { |
| 72 | while (*fmt != '%' && *fmt != '\0') |
| 73 | { |
| 74 | putc (*fmt, fp); |
| 75 | fmt++; |
| 76 | } |
| 77 | |
| 78 | if (*fmt == '%') |
| 79 | { |
| 80 | fmt++; |
| 81 | switch (*fmt++) |
| 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 'A': |
| 162 | /* section name from a section */ |
| 163 | { |
| 164 | asection *sec = va_arg (arg, asection *); |
| 165 | bfd *abfd = sec->owner; |
| 166 | const char *group = NULL; |
| 167 | struct coff_comdat_info *ci; |
| 168 | |
| 169 | fprintf (fp, "%s", sec->name); |
| 170 | if (abfd != NULL |
| 171 | && bfd_get_flavour (abfd) == bfd_target_elf_flavour |
| 172 | && elf_next_in_group (sec) != NULL |
| 173 | && (sec->flags & SEC_GROUP) == 0) |
| 174 | group = elf_group_name (sec); |
| 175 | else if (abfd != NULL |
| 176 | && bfd_get_flavour (abfd) == bfd_target_coff_flavour |
| 177 | && (ci = bfd_coff_get_comdat_section (sec->owner, |
| 178 | sec)) != NULL) |
| 179 | group = ci->name; |
| 180 | if (group != NULL) |
| 181 | fprintf (fp, "[%s]", group); |
| 182 | } |
| 183 | break; |
| 184 | |
| 185 | case 'B': |
| 186 | /* filename from a bfd */ |
| 187 | { |
| 188 | bfd *abfd = va_arg (arg, bfd *); |
| 189 | |
| 190 | if (abfd == NULL) |
| 191 | fprintf (fp, "%s generated", program_name); |
| 192 | else if (abfd->my_archive) |
| 193 | fprintf (fp, "%s(%s)", abfd->my_archive->filename, |
| 194 | abfd->filename); |
| 195 | else |
| 196 | fprintf (fp, "%s", abfd->filename); |
| 197 | } |
| 198 | break; |
| 199 | |
| 200 | case 'F': |
| 201 | /* Error is fatal. */ |
| 202 | fatal = TRUE; |
| 203 | break; |
| 204 | |
| 205 | case 'P': |
| 206 | /* Print program name. */ |
| 207 | fprintf (fp, "%s", program_name); |
| 208 | break; |
| 209 | |
| 210 | case 'E': |
| 211 | /* current bfd error or errno */ |
| 212 | fprintf (fp, "%s", bfd_errmsg (bfd_get_error ())); |
| 213 | break; |
| 214 | |
| 215 | case 'I': |
| 216 | /* filename from a lang_input_statement_type */ |
| 217 | { |
| 218 | lang_input_statement_type *i; |
| 219 | |
| 220 | i = va_arg (arg, lang_input_statement_type *); |
| 221 | if (bfd_my_archive (i->the_bfd) != NULL) |
| 222 | fprintf (fp, "(%s)", |
| 223 | bfd_get_filename (bfd_my_archive (i->the_bfd))); |
| 224 | fprintf (fp, "%s", i->local_sym_name); |
| 225 | if (bfd_my_archive (i->the_bfd) == NULL |
| 226 | && strcmp (i->local_sym_name, i->filename) != 0) |
| 227 | fprintf (fp, " (%s)", i->filename); |
| 228 | } |
| 229 | break; |
| 230 | |
| 231 | case 'S': |
| 232 | /* Print script file and linenumber. */ |
| 233 | if (parsing_defsym) |
| 234 | fprintf (fp, "--defsym %s", lex_string); |
| 235 | else if (ldfile_input_filename != NULL) |
| 236 | fprintf (fp, "%s:%u", ldfile_input_filename, lineno); |
| 237 | else |
| 238 | fprintf (fp, _("built in linker script:%u"), lineno); |
| 239 | break; |
| 240 | |
| 241 | case 'R': |
| 242 | /* Print all that's interesting about a relent. */ |
| 243 | { |
| 244 | arelent *relent = va_arg (arg, arelent *); |
| 245 | |
| 246 | lfinfo (fp, "%s+0x%v (type %s)", |
| 247 | (*(relent->sym_ptr_ptr))->name, |
| 248 | relent->addend, |
| 249 | relent->howto->name); |
| 250 | } |
| 251 | break; |
| 252 | |
| 253 | case 'C': |
| 254 | case 'D': |
| 255 | case 'G': |
| 256 | /* Clever filename:linenumber with function name if possible. |
| 257 | The arguments are a BFD, a section, and an offset. */ |
| 258 | { |
| 259 | static bfd *last_bfd; |
| 260 | static char *last_file = NULL; |
| 261 | static char *last_function = NULL; |
| 262 | bfd *abfd; |
| 263 | asection *section; |
| 264 | bfd_vma offset; |
| 265 | lang_input_statement_type *entry; |
| 266 | asymbol **asymbols; |
| 267 | const char *filename; |
| 268 | const char *functionname; |
| 269 | unsigned int linenumber; |
| 270 | bfd_boolean discard_last; |
| 271 | |
| 272 | abfd = va_arg (arg, bfd *); |
| 273 | section = va_arg (arg, asection *); |
| 274 | offset = va_arg (arg, bfd_vma); |
| 275 | |
| 276 | if (abfd == NULL) |
| 277 | { |
| 278 | entry = NULL; |
| 279 | asymbols = NULL; |
| 280 | } |
| 281 | else |
| 282 | { |
| 283 | entry = (lang_input_statement_type *) abfd->usrdata; |
| 284 | if (entry != (lang_input_statement_type *) NULL |
| 285 | && entry->asymbols != (asymbol **) NULL) |
| 286 | asymbols = entry->asymbols; |
| 287 | else |
| 288 | { |
| 289 | long symsize; |
| 290 | long sym_count; |
| 291 | |
| 292 | symsize = bfd_get_symtab_upper_bound (abfd); |
| 293 | if (symsize < 0) |
| 294 | einfo (_("%B%F: could not read symbols\n"), abfd); |
| 295 | asymbols = xmalloc (symsize); |
| 296 | sym_count = bfd_canonicalize_symtab (abfd, asymbols); |
| 297 | if (sym_count < 0) |
| 298 | einfo (_("%B%F: could not read symbols\n"), abfd); |
| 299 | if (entry != (lang_input_statement_type *) NULL) |
| 300 | { |
| 301 | entry->asymbols = asymbols; |
| 302 | entry->symbol_count = sym_count; |
| 303 | } |
| 304 | } |
| 305 | } |
| 306 | |
| 307 | /* The GNU Coding Standard requires that error messages |
| 308 | be of the form: |
| 309 | |
| 310 | source-file-name:lineno: message |
| 311 | |
| 312 | We do not always have a line number available so if |
| 313 | we cannot find them we print out the section name and |
| 314 | offset instread. */ |
| 315 | discard_last = TRUE; |
| 316 | if (abfd != NULL |
| 317 | && bfd_find_nearest_line (abfd, section, asymbols, offset, |
| 318 | &filename, &functionname, |
| 319 | &linenumber)) |
| 320 | { |
| 321 | if (functionname != NULL && fmt[-1] == 'C') |
| 322 | { |
| 323 | /* Detect the case where we are printing out a |
| 324 | message for the same function as the last |
| 325 | call to vinfo ("%C"). In this situation do |
| 326 | not print out the ABFD filename or the |
| 327 | function name again. Note - we do still |
| 328 | print out the source filename, as this will |
| 329 | allow programs that parse the linker's output |
| 330 | (eg emacs) to correctly locate multiple |
| 331 | errors in the same source file. */ |
| 332 | if (last_bfd == NULL |
| 333 | || last_file == NULL |
| 334 | || last_function == NULL |
| 335 | || last_bfd != abfd |
| 336 | || (filename != NULL |
| 337 | && strcmp (last_file, filename) != 0) |
| 338 | || strcmp (last_function, functionname) != 0) |
| 339 | { |
| 340 | lfinfo (fp, _("%B: In function `%T'"), |
| 341 | abfd, functionname); |
| 342 | |
| 343 | last_bfd = abfd; |
| 344 | if (last_file != NULL) |
| 345 | free (last_file); |
| 346 | last_file = NULL; |
| 347 | if (filename) |
| 348 | last_file = xstrdup (filename); |
| 349 | if (last_function != NULL) |
| 350 | free (last_function); |
| 351 | last_function = xstrdup (functionname); |
| 352 | } |
| 353 | discard_last = FALSE; |
| 354 | } |
| 355 | else |
| 356 | lfinfo (fp, "%B", abfd); |
| 357 | |
| 358 | if (filename != NULL) |
| 359 | fprintf (fp, ":%s", filename); |
| 360 | |
| 361 | if (functionname != NULL && fmt[-1] == 'G') |
| 362 | lfinfo (fp, ":%T", functionname); |
| 363 | else if (filename != NULL) |
| 364 | { |
| 365 | if (linenumber != 0) |
| 366 | fprintf (fp, ":%u", linenumber); |
| 367 | else |
| 368 | lfinfo (fp, ":(%A+0x%v)", section, offset); |
| 369 | } |
| 370 | } |
| 371 | else |
| 372 | lfinfo (fp, "%B:(%A+0x%v)", abfd, section, offset); |
| 373 | |
| 374 | if (asymbols != NULL && entry == NULL) |
| 375 | free (asymbols); |
| 376 | |
| 377 | if (discard_last) |
| 378 | { |
| 379 | last_bfd = NULL; |
| 380 | if (last_file != NULL) |
| 381 | { |
| 382 | free (last_file); |
| 383 | last_file = NULL; |
| 384 | } |
| 385 | if (last_function != NULL) |
| 386 | { |
| 387 | free (last_function); |
| 388 | last_function = NULL; |
| 389 | } |
| 390 | } |
| 391 | } |
| 392 | break; |
| 393 | |
| 394 | case 's': |
| 395 | /* arbitrary string, like printf */ |
| 396 | fprintf (fp, "%s", va_arg (arg, char *)); |
| 397 | break; |
| 398 | |
| 399 | case 'd': |
| 400 | /* integer, like printf */ |
| 401 | fprintf (fp, "%d", va_arg (arg, int)); |
| 402 | break; |
| 403 | |
| 404 | case 'u': |
| 405 | /* unsigned integer, like printf */ |
| 406 | fprintf (fp, "%u", va_arg (arg, unsigned int)); |
| 407 | break; |
| 408 | |
| 409 | case 'l': |
| 410 | if (*fmt == 'd') |
| 411 | { |
| 412 | fprintf (fp, "%ld", va_arg (arg, long)); |
| 413 | ++fmt; |
| 414 | break; |
| 415 | } |
| 416 | else if (*fmt == 'u') |
| 417 | { |
| 418 | fprintf (fp, "%lu", va_arg (arg, unsigned long)); |
| 419 | ++fmt; |
| 420 | break; |
| 421 | } |
| 422 | /* Fall thru */ |
| 423 | |
| 424 | default: |
| 425 | fprintf (fp, "%%%c", fmt[-1]); |
| 426 | break; |
| 427 | } |
| 428 | } |
| 429 | } |
| 430 | |
| 431 | if (is_warning && config.fatal_warnings) |
| 432 | config.make_executable = FALSE; |
| 433 | |
| 434 | if (fatal) |
| 435 | xexit (1); |
| 436 | } |
| 437 | |
| 438 | /* Wrapper around cplus_demangle. Strips leading underscores and |
| 439 | other such chars that would otherwise confuse the demangler. */ |
| 440 | |
| 441 | char * |
| 442 | demangle (const char *name) |
| 443 | { |
| 444 | char *res; |
| 445 | const char *p; |
| 446 | |
| 447 | if (output_bfd != NULL |
| 448 | && bfd_get_symbol_leading_char (output_bfd) == name[0]) |
| 449 | ++name; |
| 450 | |
| 451 | /* This is a hack for better error reporting on XCOFF, PowerPC64-ELF |
| 452 | or the MS PE format. These formats have a number of leading '.'s |
| 453 | on at least some symbols, so we remove all dots to avoid |
| 454 | confusing the demangler. */ |
| 455 | p = name; |
| 456 | while (*p == '.') |
| 457 | ++p; |
| 458 | |
| 459 | res = cplus_demangle (p, DMGL_ANSI | DMGL_PARAMS); |
| 460 | if (res) |
| 461 | { |
| 462 | size_t dots = p - name; |
| 463 | |
| 464 | /* Now put back any stripped dots. */ |
| 465 | if (dots != 0) |
| 466 | { |
| 467 | size_t len = strlen (res) + 1; |
| 468 | char *add_dots = xmalloc (len + dots); |
| 469 | |
| 470 | memcpy (add_dots, name, dots); |
| 471 | memcpy (add_dots + dots, res, len); |
| 472 | free (res); |
| 473 | res = add_dots; |
| 474 | } |
| 475 | return res; |
| 476 | } |
| 477 | return xstrdup (name); |
| 478 | } |
| 479 | |
| 480 | /* Format info message and print on stdout. */ |
| 481 | |
| 482 | /* (You would think this should be called just "info", but then you |
| 483 | would be hosed by LynxOS, which defines that name in its libc.) */ |
| 484 | |
| 485 | void |
| 486 | info_msg (const char *fmt, ...) |
| 487 | { |
| 488 | va_list arg; |
| 489 | |
| 490 | va_start (arg, fmt); |
| 491 | vfinfo (stdout, fmt, arg, FALSE); |
| 492 | va_end (arg); |
| 493 | } |
| 494 | |
| 495 | /* ('e' for error.) Format info message and print on stderr. */ |
| 496 | |
| 497 | void |
| 498 | einfo (const char *fmt, ...) |
| 499 | { |
| 500 | va_list arg; |
| 501 | |
| 502 | va_start (arg, fmt); |
| 503 | vfinfo (stderr, fmt, arg, TRUE); |
| 504 | va_end (arg); |
| 505 | } |
| 506 | |
| 507 | void |
| 508 | info_assert (const char *file, unsigned int line) |
| 509 | { |
| 510 | einfo (_("%F%P: internal error %s %d\n"), file, line); |
| 511 | } |
| 512 | |
| 513 | /* ('m' for map) Format info message and print on map. */ |
| 514 | |
| 515 | void |
| 516 | minfo (const char *fmt, ...) |
| 517 | { |
| 518 | va_list arg; |
| 519 | |
| 520 | va_start (arg, fmt); |
| 521 | vfinfo (config.map_file, fmt, arg, FALSE); |
| 522 | va_end (arg); |
| 523 | } |
| 524 | |
| 525 | void |
| 526 | lfinfo (FILE *file, const char *fmt, ...) |
| 527 | { |
| 528 | va_list arg; |
| 529 | |
| 530 | va_start (arg, fmt); |
| 531 | vfinfo (file, fmt, arg, FALSE); |
| 532 | va_end (arg); |
| 533 | } |
| 534 | \f |
| 535 | /* Functions to print the link map. */ |
| 536 | |
| 537 | void |
| 538 | print_space (void) |
| 539 | { |
| 540 | fprintf (config.map_file, " "); |
| 541 | } |
| 542 | |
| 543 | void |
| 544 | print_nl (void) |
| 545 | { |
| 546 | fprintf (config.map_file, "\n"); |
| 547 | } |
| 548 | |
| 549 | /* A more or less friendly abort message. In ld.h abort is defined to |
| 550 | call this function. */ |
| 551 | |
| 552 | void |
| 553 | ld_abort (const char *file, int line, const char *fn) |
| 554 | { |
| 555 | if (fn != NULL) |
| 556 | einfo (_("%P: internal error: aborting at %s line %d in %s\n"), |
| 557 | file, line, fn); |
| 558 | else |
| 559 | einfo (_("%P: internal error: aborting at %s line %d\n"), |
| 560 | file, line); |
| 561 | einfo (_("%P%F: please report this bug\n")); |
| 562 | xexit (1); |
| 563 | } |