1/* Main program of GNU linker. 2 Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 3 2002, 2003, 2004, 2005, 2006 4 Free Software Foundation, Inc. 5 Written by Steve Chamberlain steve@cygnus.com 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 "sysdep.h" 26#include <stdio.h> 27#include "safe-ctype.h" 28#include "libiberty.h" 29#include "progress.h" 30#include "bfdlink.h" 31#include "filenames.h" 32 33#include "ld.h" 34#include "ldmain.h" 35#include "ldmisc.h" 36#include "ldwrite.h" 37#include "ldexp.h" 38#include "ldlang.h" 39#include <ldgram.h> 40#include "ldlex.h" 41#include "ldfile.h" 42#include "ldemul.h" 43#include "ldctor.h" 44 45/* Somewhere above, sys/stat.h got included. */ 46#if !defined(S_ISDIR) && defined(S_IFDIR) 47#define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR) 48#endif 49 50#include <string.h> 51 52#ifdef HAVE_SBRK 53#if !HAVE_DECL_SBRK 54extern void *sbrk (); 55#endif 56#endif 57 58#ifndef TARGET_SYSTEM_ROOT 59#define TARGET_SYSTEM_ROOT "" 60#endif 61 62/* EXPORTS */ 63 64char *default_target; 65const char *output_filename = "a.out"; 66 67/* Name this program was invoked by. */ 68char *program_name; 69 70/* The prefix for system library directories. */ 71const char *ld_sysroot; 72 73/* The canonical representation of ld_sysroot. */ 74char * ld_canon_sysroot; 75int ld_canon_sysroot_len; 76 77/* The file that we're creating. */ 78bfd *output_bfd = 0; 79 80/* Set by -G argument, for MIPS ECOFF target. */ 81int g_switch_value = 8; 82 83/* Nonzero means print names of input files as processed. */ 84bfd_boolean trace_files; 85 86/* Nonzero means same, but note open failures, too. */ 87bfd_boolean trace_file_tries; 88 89/* Nonzero means version number was printed, so exit successfully 90 instead of complaining if no input files are given. */ 91bfd_boolean version_printed; 92 93/* Nonzero means link in every member of an archive. */ 94bfd_boolean whole_archive; 95 96/* Nonzero means create DT_NEEDED entries only if a dynamic library 97 actually satisfies some reference in a regular object. */ 98bfd_boolean as_needed; 99 100/* Nonzero means never create DT_NEEDED entries for dynamic libraries 101 in DT_NEEDED tags. */ 102bfd_boolean add_needed = TRUE; 103 104/* TRUE if we should demangle symbol names. */ 105bfd_boolean demangling; 106 107args_type command_line; 108 109ld_config_type config; 110 111sort_type sort_section; 112 113static const char *get_sysroot 114 (int, char **); 115static char *get_emulation 116 (int, char **); 117static void set_scripts_dir 118 (void); 119static bfd_boolean add_archive_element 120 (struct bfd_link_info *, bfd *, const char *); 121static bfd_boolean multiple_definition 122 (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma, 123 bfd *, asection *, bfd_vma); 124static bfd_boolean multiple_common 125 (struct bfd_link_info *, const char *, bfd *, enum bfd_link_hash_type, 126 bfd_vma, bfd *, enum bfd_link_hash_type, bfd_vma); 127static bfd_boolean add_to_set 128 (struct bfd_link_info *, struct bfd_link_hash_entry *, 129 bfd_reloc_code_real_type, bfd *, asection *, bfd_vma); 130static bfd_boolean constructor_callback 131 (struct bfd_link_info *, bfd_boolean, const char *, bfd *, 132 asection *, bfd_vma); 133static bfd_boolean warning_callback 134 (struct bfd_link_info *, const char *, const char *, bfd *, 135 asection *, bfd_vma); 136static void warning_find_reloc 137 (bfd *, asection *, void *); 138static bfd_boolean undefined_symbol 139 (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma, 140 bfd_boolean); 141static bfd_boolean reloc_overflow 142 (struct bfd_link_info *, struct bfd_link_hash_entry *, const char *, 143 const char *, bfd_vma, bfd *, asection *, bfd_vma); 144static bfd_boolean reloc_dangerous 145 (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma); 146static bfd_boolean unattached_reloc 147 (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma); 148static bfd_boolean notice 149 (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma); 150 151static struct bfd_link_callbacks link_callbacks = 152{ 153 add_archive_element, 154 multiple_definition, 155 multiple_common, 156 add_to_set, 157 constructor_callback, 158 warning_callback, 159 undefined_symbol, 160 reloc_overflow, 161 reloc_dangerous, 162 unattached_reloc, 163 notice, 164 einfo 165}; 166 167struct bfd_link_info link_info; 168 169static void 170remove_output (void) 171{ 172 if (output_filename) 173 { 174 if (output_bfd) 175 bfd_cache_close (output_bfd); 176 if (delete_output_file_on_failure) 177 unlink_if_ordinary (output_filename); 178 } 179} 180 181int 182main (int argc, char **argv) 183{ 184 char *emulation; 185 long start_time = get_run_time (); 186 187#if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES) 188 setlocale (LC_MESSAGES, ""); 189#endif 190#if defined (HAVE_SETLOCALE) 191 setlocale (LC_CTYPE, ""); 192#endif 193 bindtextdomain (PACKAGE, LOCALEDIR); 194 textdomain (PACKAGE); 195 196 program_name = argv[0]; 197 xmalloc_set_program_name (program_name); 198 199 if (pledge ("stdio rpath wpath cpath fattr", NULL) == -1) { 200 einfo (_("%X%P: Failed to pledge")); 201 xexit (1); 202 } 203 204 START_PROGRESS (program_name, 0); 205 206 expandargv (&argc, &argv); 207 208 bfd_init (); 209 210 bfd_set_error_program_name (program_name); 211 212 xatexit (remove_output); 213 214 /* Set up the sysroot directory. */ 215 ld_sysroot = get_sysroot (argc, argv); 216 if (*ld_sysroot) 217 { 218 if (*TARGET_SYSTEM_ROOT == 0) 219 { 220 einfo ("%P%F: this linker was not configured to use sysroots\n"); 221 ld_sysroot = ""; 222 } 223 else 224 ld_canon_sysroot = lrealpath (ld_sysroot); 225 } 226 if (ld_canon_sysroot) 227 ld_canon_sysroot_len = strlen (ld_canon_sysroot); 228 else 229 ld_canon_sysroot_len = -1; 230 231 /* Set the default BFD target based on the configured target. Doing 232 this permits the linker to be configured for a particular target, 233 and linked against a shared BFD library which was configured for 234 a different target. The macro TARGET is defined by Makefile. */ 235 if (! bfd_set_default_target (TARGET)) 236 { 237 einfo (_("%X%P: can't set BFD default target to `%s': %E\n"), TARGET); 238 xexit (1); 239 } 240 241#if YYDEBUG 242 { 243 extern int yydebug; 244 yydebug = 1; 245 } 246#endif 247 248 /* Initialize the data about options. */ 249 trace_files = trace_file_tries = version_printed = FALSE; 250 whole_archive = FALSE; 251 config.build_constructors = TRUE; 252 config.dynamic_link = FALSE; 253 config.has_shared = FALSE; 254 config.split_by_reloc = (unsigned) -1; 255 config.split_by_file = (bfd_size_type) -1; 256 config.hash_table_size = 0; 257 command_line.force_common_definition = FALSE; 258 command_line.inhibit_common_definition = FALSE; 259 command_line.interpreter = NULL; 260 command_line.rpath = NULL; 261 command_line.warn_mismatch = TRUE; 262 command_line.check_section_addresses = TRUE; 263 command_line.accept_unknown_input_arch = FALSE; 264 265 sort_section = none; 266 267 /* We initialize DEMANGLING based on the environment variable 268 COLLECT_NO_DEMANGLE. The gcc collect2 program will demangle the 269 output of the linker, unless COLLECT_NO_DEMANGLE is set in the 270 environment. Acting the same way here lets us provide the same 271 interface by default. */ 272 demangling = getenv ("COLLECT_NO_DEMANGLE") == NULL; 273 274 link_info.relocatable = FALSE; 275 link_info.emitrelocations = FALSE; 276 link_info.task_link = FALSE; 277 link_info.shared = FALSE; 278#ifdef PIE_DEFAULT 279 link_info.pie = TRUE; 280#else 281 link_info.pie = FALSE; 282#endif 283 link_info.executable = FALSE; 284 link_info.symbolic = FALSE; 285 link_info.export_dynamic = FALSE; 286 link_info.static_link = FALSE; 287 link_info.traditional_format = FALSE; 288 link_info.optimize = FALSE; 289 link_info.unresolved_syms_in_objects = RM_NOT_YET_SET; 290 link_info.unresolved_syms_in_shared_libs = RM_NOT_YET_SET; 291 link_info.allow_multiple_definition = FALSE; 292 link_info.allow_undefined_version = TRUE; 293 link_info.allow_textrel = FALSE; 294 link_info.create_default_symver = FALSE; 295 link_info.default_imported_symver = FALSE; 296 link_info.keep_memory = TRUE; 297 link_info.notice_all = FALSE; 298 link_info.nocopyreloc = FALSE; 299 link_info.new_dtags = TRUE; /* to match lld */ 300 link_info.combreloc = TRUE; 301 link_info.eh_frame_hdr = FALSE; 302 link_info.relro = TRUE; 303 link_info.strip_discarded = TRUE; 304 link_info.strip = strip_none; 305 link_info.discard = discard_sec_merge; 306 link_info.common_skip_ar_aymbols = bfd_link_common_skip_none; 307 link_info.callbacks = &link_callbacks; 308 link_info.hash = NULL; 309 link_info.keep_hash = NULL; 310 link_info.notice_hash = NULL; 311 link_info.wrap_hash = NULL; 312 link_info.input_bfds = NULL; 313 link_info.create_object_symbols_section = NULL; 314 link_info.gc_sym_list = NULL; 315 link_info.base_file = NULL; 316 link_info.emit_hash = TRUE; 317#ifndef __mips64__ 318 link_info.emit_gnu_hash = TRUE; 319#else 320 link_info.emit_gnu_hash = FALSE; 321#endif 322#if defined(__amd64__) || defined(__hppa__) || defined(__mips64__) 323 link_info.execute_only = TRUE; 324#else 325 link_info.execute_only = FALSE; 326#endif 327 /* SVR4 linkers seem to set DT_INIT and DT_FINI based on magic _init 328 and _fini symbols. We are compatible. */ 329 link_info.init_function = "_init"; 330 link_info.fini_function = "_fini"; 331 link_info.pei386_auto_import = -1; 332 link_info.pei386_runtime_pseudo_reloc = FALSE; 333 link_info.spare_dynamic_tags = 5; 334 link_info.flags = 0; 335 link_info.flags_1 = 0; 336 link_info.relax_pass = 1; 337 link_info.warn_shared_textrel = FALSE; 338 link_info.gc_sections = FALSE; 339 link_info.reduce_memory_overheads = FALSE; 340 341 ldfile_add_arch (""); 342 343 config.make_executable = TRUE; 344 force_make_executable = FALSE; 345 config.magic_demand_paged = TRUE; 346 config.text_read_only = TRUE; 347 config.data_bss_contig = FALSE; 348 349 emulation = get_emulation (argc, argv); 350 ldemul_choose_mode (emulation); 351 default_target = ldemul_choose_target (argc, argv); 352 lang_init (); 353 ldemul_before_parse (); 354 lang_has_input_file = FALSE; 355 parse_args (argc, argv); 356 357 if (config.hash_table_size != 0) 358 bfd_hash_set_default_size (config.hash_table_size); 359 360 ldemul_set_symbols (); 361 362 if (! link_info.shared && link_info.pie) 363 { 364 if (link_info.relocatable) 365 link_info.pie = FALSE; 366 else 367 link_info.shared = TRUE; 368 } 369 370 if (link_info.relocatable) 371 { 372 if (link_info.gc_sections) 373 einfo ("%P%F: --gc-sections and -r may not be used together\n"); 374 else if (command_line.relax) 375 einfo (_("%P%F: --relax and -r may not be used together\n")); 376 if (link_info.shared) 377 einfo (_("%P%F: -r and -shared may not be used together\n")); 378 } 379 380 if (! link_info.shared) 381 { 382 if (command_line.filter_shlib) 383 einfo (_("%P%F: -F may not be used without -shared\n")); 384 if (command_line.auxiliary_filters) 385 einfo (_("%P%F: -f may not be used without -shared\n")); 386 } 387 388 if (! link_info.shared || link_info.pie) 389 link_info.executable = TRUE; 390 391 if (! config.dynamic_link && link_info.pie) 392 link_info.static_link = TRUE; 393 394 /* Treat ld -r -s as ld -r -S -x (i.e., strip all local symbols). I 395 don't see how else this can be handled, since in this case we 396 must preserve all externally visible symbols. */ 397 if (link_info.relocatable && link_info.strip == strip_all) 398 { 399 link_info.strip = strip_debugger; 400 if (link_info.discard == discard_sec_merge) 401 link_info.discard = discard_all; 402 } 403 404 /* This essentially adds another -L directory so this must be done after 405 the -L's in argv have been processed. */ 406 set_scripts_dir (); 407 408 /* If we have not already opened and parsed a linker script 409 read the emulation's appropriate default script. */ 410 if (saved_script_handle == NULL) 411 { 412 int isfile; 413 char *s = ldemul_get_script (&isfile); 414 415 if (isfile) 416 ldfile_open_command_file (s); 417 else 418 { 419 lex_string = s; 420 lex_redirect (s); 421 } 422 parser_input = input_script; 423 yyparse (); 424 lex_string = NULL; 425 } 426 427 if (trace_file_tries) 428 { 429 if (saved_script_handle) 430 info_msg (_("using external linker script:")); 431 else 432 info_msg (_("using internal linker script:")); 433 info_msg ("\n==================================================\n"); 434 435 if (saved_script_handle) 436 { 437 static const int ld_bufsz = 8193; 438 size_t n; 439 char *buf = xmalloc (ld_bufsz); 440 441 rewind (saved_script_handle); 442 while ((n = fread (buf, 1, ld_bufsz - 1, saved_script_handle)) > 0) 443 { 444 buf[n] = 0; 445 info_msg (buf); 446 } 447 rewind (saved_script_handle); 448 free (buf); 449 } 450 else 451 { 452 int isfile; 453 454 info_msg (ldemul_get_script (&isfile)); 455 } 456 457 info_msg ("\n==================================================\n"); 458 } 459 460 lang_final (); 461 462 if (!lang_has_input_file) 463 { 464 if (version_printed) 465 xexit (0); 466 einfo (_("%P%F: no input files\n")); 467 } 468 469 if (trace_files) 470 info_msg (_("%P: mode %s\n"), emulation); 471 472 ldemul_after_parse (); 473 474 if (config.map_filename) 475 { 476 if (strcmp (config.map_filename, "-") == 0) 477 { 478 config.map_file = stdout; 479 } 480 else 481 { 482 config.map_file = fopen (config.map_filename, FOPEN_WT); 483 if (config.map_file == (FILE *) NULL) 484 { 485 bfd_set_error (bfd_error_system_call); 486 einfo (_("%P%F: cannot open map file %s: %E\n"), 487 config.map_filename); 488 } 489 } 490 } 491 492 lang_process (); 493 494 /* Print error messages for any missing symbols, for any warning 495 symbols, and possibly multiple definitions. */ 496 if (link_info.relocatable) 497 output_bfd->flags &= ~EXEC_P; 498 else 499 output_bfd->flags |= EXEC_P; 500 501 ldwrite (); 502 503 if (config.map_file != NULL) 504 lang_map (); 505 if (command_line.cref) 506 output_cref (config.map_file != NULL ? config.map_file : stdout); 507 if (nocrossref_list != NULL) 508 check_nocrossrefs (); 509 510 lang_finish (); 511 512 /* Even if we're producing relocatable output, some non-fatal errors should 513 be reported in the exit status. (What non-fatal errors, if any, do we 514 want to ignore for relocatable output?) */ 515 if (!config.make_executable && !force_make_executable) 516 { 517 if (trace_files) 518 einfo (_("%P: link errors found, deleting executable `%s'\n"), 519 output_filename); 520 521 /* The file will be removed by remove_output. */ 522 xexit (1); 523 } 524 else 525 { 526 if (! bfd_close (output_bfd)) 527 einfo (_("%F%B: final close failed: %E\n"), output_bfd); 528 529 /* If the --force-exe-suffix is enabled, and we're making an 530 executable file and it doesn't end in .exe, copy it to one 531 which does. */ 532 if (! link_info.relocatable && command_line.force_exe_suffix) 533 { 534 int len = strlen (output_filename); 535 536 if (len < 4 537 || (strcasecmp (output_filename + len - 4, ".exe") != 0 538 && strcasecmp (output_filename + len - 4, ".dll") != 0)) 539 { 540 FILE *src; 541 FILE *dst; 542 const int bsize = 4096; 543 char *buf = xmalloc (bsize); 544 int l; 545 char *dst_name = xmalloc (len + 5); 546 547 strcpy (dst_name, output_filename); 548 strcat (dst_name, ".exe"); 549 src = fopen (output_filename, FOPEN_RB); 550 dst = fopen (dst_name, FOPEN_WB); 551 552 if (!src) 553 einfo (_("%X%P: unable to open for source of copy `%s'\n"), 554 output_filename); 555 if (!dst) 556 einfo (_("%X%P: unable to open for destination of copy `%s'\n"), 557 dst_name); 558 while ((l = fread (buf, 1, bsize, src)) > 0) 559 { 560 int done = fwrite (buf, 1, l, dst); 561 562 if (done != l) 563 einfo (_("%P: Error writing file `%s'\n"), dst_name); 564 } 565 566 fclose (src); 567 if (fclose (dst) == EOF) 568 einfo (_("%P: Error closing file `%s'\n"), dst_name); 569 free (dst_name); 570 free (buf); 571 } 572 } 573 } 574 575 END_PROGRESS (program_name); 576 577 if (config.stats) 578 { 579#ifdef HAVE_SBRK 580 char *lim = sbrk (0); 581#endif 582 long run_time = get_run_time () - start_time; 583 584 fprintf (stderr, _("%s: total time in link: %ld.%06ld\n"), 585 program_name, run_time / 1000000, run_time % 1000000); 586#ifdef HAVE_SBRK 587 fprintf (stderr, _("%s: data size %ld\n"), program_name, 588 (long) (lim - (char *) &environ)); 589#endif 590 } 591 592 /* Prevent remove_output from doing anything, after a successful link. */ 593 output_filename = NULL; 594 595 xexit (0); 596 return 0; 597} 598 599/* If the configured sysroot is relocatable, try relocating it based on 600 default prefix FROM. Return the relocated directory if it exists, 601 otherwise return null. */ 602 603static char * 604get_relative_sysroot (const char *from ATTRIBUTE_UNUSED) 605{ 606#ifdef TARGET_SYSTEM_ROOT_RELOCATABLE 607 char *path; 608 struct stat s; 609 610 path = make_relative_prefix (program_name, from, TARGET_SYSTEM_ROOT); 611 if (path) 612 { 613 if (stat (path, &s) == 0 && S_ISDIR (s.st_mode)) 614 return path; 615 free (path); 616 } 617#endif 618 return 0; 619} 620 621/* Return the sysroot directory. Return "" if no sysroot is being used. */ 622 623static const char * 624get_sysroot (int argc, char **argv) 625{ 626 int i; 627 const char *path; 628 629 for (i = 1; i < argc; i++) 630 if (strncmp (argv[i], "--sysroot=", strlen ("--sysroot=")) == 0) 631 return argv[i] + strlen ("--sysroot="); 632 633 path = get_relative_sysroot (BINDIR); 634 if (path) 635 return path; 636 637 path = get_relative_sysroot (TOOLBINDIR); 638 if (path) 639 return path; 640 641 return TARGET_SYSTEM_ROOT; 642} 643 644/* We need to find any explicitly given emulation in order to initialize the 645 state that's needed by the lex&yacc argument parser (parse_args). */ 646 647static char * 648get_emulation (int argc, char **argv) 649{ 650 char *emulation; 651 int i; 652 653 emulation = getenv (EMULATION_ENVIRON); 654 if (emulation == NULL) 655 emulation = DEFAULT_EMULATION; 656 657 for (i = 1; i < argc; i++) 658 { 659 if (!strncmp (argv[i], "-m", 2)) 660 { 661 if (argv[i][2] == '\0') 662 { 663 /* -m EMUL */ 664 if (i < argc - 1) 665 { 666 emulation = argv[i + 1]; 667 i++; 668 } 669 else 670 einfo (_("%P%F: missing argument to -m\n")); 671 } 672 else if (strcmp (argv[i], "-mips1") == 0 673 || strcmp (argv[i], "-mips2") == 0 674 || strcmp (argv[i], "-mips3") == 0 675 || strcmp (argv[i], "-mips4") == 0 676 || strcmp (argv[i], "-mips5") == 0 677 || strcmp (argv[i], "-mips32") == 0 678 || strcmp (argv[i], "-mips32r2") == 0 679 || strcmp (argv[i], "-mips64") == 0 680 || strcmp (argv[i], "-mips64r2") == 0) 681 { 682 /* FIXME: The arguments -mips1, -mips2, -mips3, etc. are 683 passed to the linker by some MIPS compilers. They 684 generally tell the linker to use a slightly different 685 library path. Perhaps someday these should be 686 implemented as emulations; until then, we just ignore 687 the arguments and hope that nobody ever creates 688 emulations named ips1, ips2 or ips3. */ 689 } 690 else if (strcmp (argv[i], "-m486") == 0) 691 { 692 /* FIXME: The argument -m486 is passed to the linker on 693 some Linux systems. Hope that nobody creates an 694 emulation named 486. */ 695 } 696 else 697 { 698 /* -mEMUL */ 699 emulation = &argv[i][2]; 700 } 701 } 702 } 703 704 return emulation; 705} 706 707/* If directory DIR contains an "ldscripts" subdirectory, 708 add DIR to the library search path and return TRUE, 709 else return FALSE. */ 710 711static bfd_boolean 712check_for_scripts_dir (char *dir) 713{ 714 size_t dirlen; 715 char *buf; 716 struct stat s; 717 bfd_boolean res; 718 719 dirlen = strlen (dir); 720 /* sizeof counts the terminating NUL. */ 721 buf = xmalloc (dirlen + sizeof ("/ldscripts")); 722 sprintf (buf, "%s/ldscripts", dir); 723 724 res = stat (buf, &s) == 0 && S_ISDIR (s.st_mode); 725 free (buf); 726 if (res) 727 ldfile_add_library_path (dir, FALSE); 728 return res; 729} 730 731/* Set the default directory for finding script files. 732 Libraries will be searched for here too, but that's ok. 733 We look for the "ldscripts" directory in: 734 735 SCRIPTDIR (passed from Makefile) 736 (adjusted according to the current location of the binary) 737 SCRIPTDIR (passed from Makefile) 738 the dir where this program is (for using it from the build tree) 739 the dir where this program is/../lib 740 (for installing the tool suite elsewhere). */ 741 742static void 743set_scripts_dir (void) 744{ 745 char *end, *dir; 746 size_t dirlen; 747 bfd_boolean found; 748 749 dir = make_relative_prefix (program_name, BINDIR, SCRIPTDIR); 750 if (dir) 751 { 752 found = check_for_scripts_dir (dir); 753 free (dir); 754 if (found) 755 return; 756 } 757 758 dir = make_relative_prefix (program_name, TOOLBINDIR, SCRIPTDIR); 759 if (dir) 760 { 761 found = check_for_scripts_dir (dir); 762 free (dir); 763 if (found) 764 return; 765 } 766 767 if (check_for_scripts_dir (SCRIPTDIR)) 768 /* We've been installed normally. */ 769 return; 770 771 /* Look for "ldscripts" in the dir where our binary is. */ 772 end = strrchr (program_name, '/'); 773#ifdef HAVE_DOS_BASED_FILE_SYSTEM 774 { 775 /* We could have \foo\bar, or /foo\bar. */ 776 char *bslash = strrchr (program_name, '\\'); 777 778 if (end == NULL || (bslash != NULL && bslash > end)) 779 end = bslash; 780 } 781#endif 782 783 if (end == NULL) 784 /* Don't look for ldscripts in the current directory. There is 785 too much potential for confusion. */ 786 return; 787 788 dirlen = end - program_name; 789 /* Make a copy of program_name in dir. 790 Leave room for later "/../lib". */ 791 dir = xmalloc (dirlen + 8); 792 strncpy (dir, program_name, dirlen); 793 dir[dirlen] = '\0'; 794 795 if (check_for_scripts_dir (dir)) 796 { 797 free (dir); 798 return; 799 } 800 801 /* Look for "ldscripts" in <the dir where our binary is>/../lib. */ 802 strcpy (dir + dirlen, "/../lib"); 803 check_for_scripts_dir (dir); 804 free (dir); 805} 806 807void 808add_ysym (const char *name) 809{ 810 if (link_info.notice_hash == NULL) 811 { 812 link_info.notice_hash = xmalloc (sizeof (struct bfd_hash_table)); 813 if (!bfd_hash_table_init_n (link_info.notice_hash, 814 bfd_hash_newfunc, 815 sizeof (struct bfd_hash_entry), 816 61)) 817 einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); 818 } 819 820 if (bfd_hash_lookup (link_info.notice_hash, name, TRUE, TRUE) == NULL) 821 einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); 822} 823 824/* Record a symbol to be wrapped, from the --wrap option. */ 825 826void 827add_wrap (const char *name) 828{ 829 if (link_info.wrap_hash == NULL) 830 { 831 link_info.wrap_hash = xmalloc (sizeof (struct bfd_hash_table)); 832 if (!bfd_hash_table_init_n (link_info.wrap_hash, 833 bfd_hash_newfunc, 834 sizeof (struct bfd_hash_entry), 835 61)) 836 einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); 837 } 838 839 if (bfd_hash_lookup (link_info.wrap_hash, name, TRUE, TRUE) == NULL) 840 einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); 841} 842 843/* Handle the -retain-symbols-file option. */ 844 845void 846add_keepsyms_file (const char *filename) 847{ 848 FILE *file; 849 char *buf; 850 size_t bufsize; 851 int c; 852 853 if (link_info.strip == strip_some) 854 einfo (_("%X%P: error: duplicate retain-symbols-file\n")); 855 856 file = fopen (filename, "r"); 857 if (file == NULL) 858 { 859 bfd_set_error (bfd_error_system_call); 860 einfo ("%X%P: %s: %E\n", filename); 861 return; 862 } 863 864 link_info.keep_hash = xmalloc (sizeof (struct bfd_hash_table)); 865 if (!bfd_hash_table_init (link_info.keep_hash, bfd_hash_newfunc, 866 sizeof (struct bfd_hash_entry))) 867 einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); 868 869 bufsize = 100; 870 buf = xmalloc (bufsize); 871 872 c = getc (file); 873 while (c != EOF) 874 { 875 while (ISSPACE (c)) 876 c = getc (file); 877 878 if (c != EOF) 879 { 880 size_t len = 0; 881 882 while (! ISSPACE (c) && c != EOF) 883 { 884 buf[len] = c; 885 ++len; 886 if (len >= bufsize) 887 { 888 bufsize *= 2; 889 buf = xrealloc (buf, bufsize); 890 } 891 c = getc (file); 892 } 893 894 buf[len] = '\0'; 895 896 if (bfd_hash_lookup (link_info.keep_hash, buf, TRUE, TRUE) == NULL) 897 einfo (_("%P%F: bfd_hash_lookup for insertion failed: %E\n")); 898 } 899 } 900 901 if (link_info.strip != strip_none) 902 einfo (_("%P: `-retain-symbols-file' overrides `-s' and `-S'\n")); 903 904 free (buf); 905 link_info.strip = strip_some; 906} 907 908/* Callbacks from the BFD linker routines. */ 909 910/* This is called when BFD has decided to include an archive member in 911 a link. */ 912 913static bfd_boolean 914add_archive_element (struct bfd_link_info *info, 915 bfd *abfd, 916 const char *name) 917{ 918 lang_input_statement_type *input; 919 920 input = xmalloc (sizeof (lang_input_statement_type)); 921 input->filename = abfd->filename; 922 input->local_sym_name = abfd->filename; 923 input->the_bfd = abfd; 924 input->asymbols = NULL; 925 input->next = NULL; 926 input->just_syms_flag = FALSE; 927 input->loaded = FALSE; 928 input->search_dirs_flag = FALSE; 929 930 /* FIXME: The following fields are not set: header.next, 931 header.type, closed, passive_position, symbol_count, 932 next_real_file, is_archive, target, real. This bit of code is 933 from the old decode_library_subfile function. I don't know 934 whether any of those fields matters. */ 935 936 ldlang_add_file (input); 937 938 if (config.map_file != NULL) 939 { 940 static bfd_boolean header_printed; 941 struct bfd_link_hash_entry *h; 942 bfd *from; 943 int len; 944 945 h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE); 946 947 if (h == NULL) 948 from = NULL; 949 else 950 { 951 switch (h->type) 952 { 953 default: 954 from = NULL; 955 break; 956 957 case bfd_link_hash_defined: 958 case bfd_link_hash_defweak: 959 from = h->u.def.section->owner; 960 break; 961 962 case bfd_link_hash_undefined: 963 case bfd_link_hash_undefweak: 964 from = h->u.undef.abfd; 965 break; 966 967 case bfd_link_hash_common: 968 from = h->u.c.p->section->owner; 969 break; 970 } 971 } 972 973 if (! header_printed) 974 { 975 char buf[100]; 976 977 sprintf (buf, _("Archive member included because of file (symbol)\n\n")); 978 minfo ("%s", buf); 979 header_printed = TRUE; 980 } 981 982 if (bfd_my_archive (abfd) == NULL) 983 { 984 minfo ("%s", bfd_get_filename (abfd)); 985 len = strlen (bfd_get_filename (abfd)); 986 } 987 else 988 { 989 minfo ("%s(%s)", bfd_get_filename (bfd_my_archive (abfd)), 990 bfd_get_filename (abfd)); 991 len = (strlen (bfd_get_filename (bfd_my_archive (abfd))) 992 + strlen (bfd_get_filename (abfd)) 993 + 2); 994 } 995 996 if (len >= 29) 997 { 998 print_nl (); 999 len = 0; 1000 } 1001 while (len < 30) 1002 { 1003 print_space (); 1004 ++len; 1005 } 1006 1007 if (from != NULL) 1008 minfo ("%B ", from); 1009 if (h != NULL) 1010 minfo ("(%T)\n", h->root.string); 1011 else 1012 minfo ("(%s)\n", name); 1013 } 1014 1015 if (trace_files || trace_file_tries) 1016 info_msg ("%I\n", input); 1017 1018 return TRUE; 1019} 1020 1021/* This is called when BFD has discovered a symbol which is defined 1022 multiple times. */ 1023 1024static bfd_boolean 1025multiple_definition (struct bfd_link_info *info ATTRIBUTE_UNUSED, 1026 const char *name, 1027 bfd *obfd, 1028 asection *osec, 1029 bfd_vma oval, 1030 bfd *nbfd, 1031 asection *nsec, 1032 bfd_vma nval) 1033{ 1034 /* If either section has the output_section field set to 1035 bfd_abs_section_ptr, it means that the section is being 1036 discarded, and this is not really a multiple definition at all. 1037 FIXME: It would be cleaner to somehow ignore symbols defined in 1038 sections which are being discarded. */ 1039 if ((osec->output_section != NULL 1040 && ! bfd_is_abs_section (osec) 1041 && bfd_is_abs_section (osec->output_section)) 1042 || (nsec->output_section != NULL 1043 && ! bfd_is_abs_section (nsec) 1044 && bfd_is_abs_section (nsec->output_section))) 1045 return TRUE; 1046 1047 einfo (_("%X%C: multiple definition of `%T'\n"), 1048 nbfd, nsec, nval, name); 1049 if (obfd != NULL) 1050 einfo (_("%D: first defined here\n"), obfd, osec, oval); 1051 1052 if (command_line.relax) 1053 { 1054 einfo (_("%P: Disabling relaxation: it will not work with multiple definitions\n")); 1055 command_line.relax = 0; 1056 } 1057 1058 return TRUE; 1059} 1060 1061/* This is called when there is a definition of a common symbol, or 1062 when a common symbol is found for a symbol that is already defined, 1063 or when two common symbols are found. We only do something if 1064 -warn-common was used. */ 1065 1066static bfd_boolean 1067multiple_common (struct bfd_link_info *info ATTRIBUTE_UNUSED, 1068 const char *name, 1069 bfd *obfd, 1070 enum bfd_link_hash_type otype, 1071 bfd_vma osize, 1072 bfd *nbfd, 1073 enum bfd_link_hash_type ntype, 1074 bfd_vma nsize) 1075{ 1076 if (! config.warn_common) 1077 return TRUE; 1078 1079 if (ntype == bfd_link_hash_defined 1080 || ntype == bfd_link_hash_defweak 1081 || ntype == bfd_link_hash_indirect) 1082 { 1083 ASSERT (otype == bfd_link_hash_common); 1084 einfo (_("%B: warning: definition of `%T' overriding common\n"), 1085 nbfd, name); 1086 if (obfd != NULL) 1087 einfo (_("%B: warning: common is here\n"), obfd); 1088 } 1089 else if (otype == bfd_link_hash_defined 1090 || otype == bfd_link_hash_defweak 1091 || otype == bfd_link_hash_indirect) 1092 { 1093 ASSERT (ntype == bfd_link_hash_common); 1094 einfo (_("%B: warning: common of `%T' overridden by definition\n"), 1095 nbfd, name); 1096 if (obfd != NULL) 1097 einfo (_("%B: warning: defined here\n"), obfd); 1098 } 1099 else 1100 { 1101 ASSERT (otype == bfd_link_hash_common && ntype == bfd_link_hash_common); 1102 if (osize > nsize) 1103 { 1104 einfo (_("%B: warning: common of `%T' overridden by larger common\n"), 1105 nbfd, name); 1106 if (obfd != NULL) 1107 einfo (_("%B: warning: larger common is here\n"), obfd); 1108 } 1109 else if (nsize > osize) 1110 { 1111 einfo (_("%B: warning: common of `%T' overriding smaller common\n"), 1112 nbfd, name); 1113 if (obfd != NULL) 1114 einfo (_("%B: warning: smaller common is here\n"), obfd); 1115 } 1116 else 1117 { 1118 einfo (_("%B: warning: multiple common of `%T'\n"), nbfd, name); 1119 if (obfd != NULL) 1120 einfo (_("%B: warning: previous common is here\n"), obfd); 1121 } 1122 } 1123 1124 return TRUE; 1125} 1126 1127/* This is called when BFD has discovered a set element. H is the 1128 entry in the linker hash table for the set. SECTION and VALUE 1129 represent a value which should be added to the set. */ 1130 1131static bfd_boolean 1132add_to_set (struct bfd_link_info *info ATTRIBUTE_UNUSED, 1133 struct bfd_link_hash_entry *h, 1134 bfd_reloc_code_real_type reloc, 1135 bfd *abfd, 1136 asection *section, 1137 bfd_vma value) 1138{ 1139 if (config.warn_constructors) 1140 einfo (_("%P: warning: global constructor %s used\n"), 1141 h->root.string); 1142 1143 if (! config.build_constructors) 1144 return TRUE; 1145 1146 ldctor_add_set_entry (h, reloc, NULL, section, value); 1147 1148 if (h->type == bfd_link_hash_new) 1149 { 1150 h->type = bfd_link_hash_undefined; 1151 h->u.undef.abfd = abfd; 1152 /* We don't call bfd_link_add_undef to add this to the list of 1153 undefined symbols because we are going to define it 1154 ourselves. */ 1155 } 1156 1157 return TRUE; 1158} 1159 1160/* This is called when BFD has discovered a constructor. This is only 1161 called for some object file formats--those which do not handle 1162 constructors in some more clever fashion. This is similar to 1163 adding an element to a set, but less general. */ 1164 1165static bfd_boolean 1166constructor_callback (struct bfd_link_info *info, 1167 bfd_boolean constructor, 1168 const char *name, 1169 bfd *abfd, 1170 asection *section, 1171 bfd_vma value) 1172{ 1173 char *s; 1174 struct bfd_link_hash_entry *h; 1175 char set_name[1 + sizeof "__CTOR_LIST__"]; 1176 1177 if (config.warn_constructors) 1178 einfo (_("%P: warning: global constructor %s used\n"), name); 1179 1180 if (! config.build_constructors) 1181 return TRUE; 1182 1183 /* Ensure that BFD_RELOC_CTOR exists now, so that we can give a 1184 useful error message. */ 1185 if (bfd_reloc_type_lookup (output_bfd, BFD_RELOC_CTOR) == NULL 1186 && (info->relocatable 1187 || bfd_reloc_type_lookup (abfd, BFD_RELOC_CTOR) == NULL)) 1188 einfo (_("%P%F: BFD backend error: BFD_RELOC_CTOR unsupported\n")); 1189 1190 s = set_name; 1191 if (bfd_get_symbol_leading_char (abfd) != '\0') 1192 *s++ = bfd_get_symbol_leading_char (abfd); 1193 if (constructor) 1194 strcpy (s, "__CTOR_LIST__"); 1195 else 1196 strcpy (s, "__DTOR_LIST__"); 1197 1198 h = bfd_link_hash_lookup (info->hash, set_name, TRUE, TRUE, TRUE); 1199 if (h == (struct bfd_link_hash_entry *) NULL) 1200 einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n")); 1201 if (h->type == bfd_link_hash_new) 1202 { 1203 h->type = bfd_link_hash_undefined; 1204 h->u.undef.abfd = abfd; 1205 /* We don't call bfd_link_add_undef to add this to the list of 1206 undefined symbols because we are going to define it 1207 ourselves. */ 1208 } 1209 1210 ldctor_add_set_entry (h, BFD_RELOC_CTOR, name, section, value); 1211 return TRUE; 1212} 1213 1214/* A structure used by warning_callback to pass information through 1215 bfd_map_over_sections. */ 1216 1217struct warning_callback_info 1218{ 1219 bfd_boolean found; 1220 const char *warning; 1221 const char *symbol; 1222 asymbol **asymbols; 1223}; 1224 1225/* This is called when there is a reference to a warning symbol. */ 1226 1227static bfd_boolean 1228warning_callback (struct bfd_link_info *info ATTRIBUTE_UNUSED, 1229 const char *warning, 1230 const char *symbol, 1231 bfd *abfd, 1232 asection *section, 1233 bfd_vma address) 1234{ 1235 /* This is a hack to support warn_multiple_gp. FIXME: This should 1236 have a cleaner interface, but what? */ 1237 if (! config.warn_multiple_gp 1238 && strcmp (warning, "using multiple gp values") == 0) 1239 return TRUE; 1240 1241 if (section != NULL) 1242 einfo ("%C: %s%s\n", abfd, section, address, _("warning: "), warning); 1243 else if (abfd == NULL) 1244 einfo ("%P: %s%s\n", _("warning: "), warning); 1245 else if (symbol == NULL) 1246 einfo ("%B: %s%s\n", abfd, _("warning: "), warning); 1247 else 1248 { 1249 lang_input_statement_type *entry; 1250 asymbol **asymbols; 1251 struct warning_callback_info info; 1252 1253 /* Look through the relocs to see if we can find a plausible 1254 address. */ 1255 entry = (lang_input_statement_type *) abfd->usrdata; 1256 if (entry != NULL && entry->asymbols != NULL) 1257 asymbols = entry->asymbols; 1258 else 1259 { 1260 long symsize; 1261 long symbol_count; 1262 1263 symsize = bfd_get_symtab_upper_bound (abfd); 1264 if (symsize < 0) 1265 einfo (_("%B%F: could not read symbols: %E\n"), abfd); 1266 asymbols = xmalloc (symsize); 1267 symbol_count = bfd_canonicalize_symtab (abfd, asymbols); 1268 if (symbol_count < 0) 1269 einfo (_("%B%F: could not read symbols: %E\n"), abfd); 1270 if (entry != NULL) 1271 { 1272 entry->asymbols = asymbols; 1273 entry->symbol_count = symbol_count; 1274 } 1275 } 1276 1277 info.found = FALSE; 1278 info.warning = warning; 1279 info.symbol = symbol; 1280 info.asymbols = asymbols; 1281 bfd_map_over_sections (abfd, warning_find_reloc, &info); 1282 1283 if (! info.found) 1284 einfo ("%B: %s%s\n", abfd, _("warning: "), warning); 1285 1286 if (entry == NULL) 1287 free (asymbols); 1288 } 1289 1290 return TRUE; 1291} 1292 1293/* This is called by warning_callback for each section. It checks the 1294 relocs of the section to see if it can find a reference to the 1295 symbol which triggered the warning. If it can, it uses the reloc 1296 to give an error message with a file and line number. */ 1297 1298static void 1299warning_find_reloc (bfd *abfd, asection *sec, void *iarg) 1300{ 1301 struct warning_callback_info *info = iarg; 1302 long relsize; 1303 arelent **relpp; 1304 long relcount; 1305 arelent **p, **pend; 1306 1307 if (info->found) 1308 return; 1309 1310 relsize = bfd_get_reloc_upper_bound (abfd, sec); 1311 if (relsize < 0) 1312 einfo (_("%B%F: could not read relocs: %E\n"), abfd); 1313 if (relsize == 0) 1314 return; 1315 1316 relpp = xmalloc (relsize); 1317 relcount = bfd_canonicalize_reloc (abfd, sec, relpp, info->asymbols); 1318 if (relcount < 0) 1319 einfo (_("%B%F: could not read relocs: %E\n"), abfd); 1320 1321 p = relpp; 1322 pend = p + relcount; 1323 for (; p < pend && *p != NULL; p++) 1324 { 1325 arelent *q = *p; 1326 1327 if (q->sym_ptr_ptr != NULL 1328 && *q->sym_ptr_ptr != NULL 1329 && strcmp (bfd_asymbol_name (*q->sym_ptr_ptr), info->symbol) == 0) 1330 { 1331 /* We found a reloc for the symbol we are looking for. */ 1332 einfo ("%C: %s%s\n", abfd, sec, q->address, _("warning: "), 1333 info->warning); 1334 info->found = TRUE; 1335 break; 1336 } 1337 } 1338 1339 free (relpp); 1340} 1341 1342/* This is called when an undefined symbol is found. */ 1343 1344static bfd_boolean 1345undefined_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED, 1346 const char *name, 1347 bfd *abfd, 1348 asection *section, 1349 bfd_vma address, 1350 bfd_boolean error) 1351{ 1352 static char *error_name; 1353 static unsigned int error_count; 1354 1355#define MAX_ERRORS_IN_A_ROW 5 1356 1357 if (config.warn_once) 1358 { 1359 static struct bfd_hash_table *hash; 1360 1361 /* Only warn once about a particular undefined symbol. */ 1362 if (hash == NULL) 1363 { 1364 hash = xmalloc (sizeof (struct bfd_hash_table)); 1365 if (!bfd_hash_table_init (hash, bfd_hash_newfunc, 1366 sizeof (struct bfd_hash_entry))) 1367 einfo (_("%F%P: bfd_hash_table_init failed: %E\n")); 1368 } 1369 1370 if (bfd_hash_lookup (hash, name, FALSE, FALSE) != NULL) 1371 return TRUE; 1372 1373 if (bfd_hash_lookup (hash, name, TRUE, TRUE) == NULL) 1374 einfo (_("%F%P: bfd_hash_lookup failed: %E\n")); 1375 } 1376 1377 /* We never print more than a reasonable number of errors in a row 1378 for a single symbol. */ 1379 if (error_name != NULL 1380 && strcmp (name, error_name) == 0) 1381 ++error_count; 1382 else 1383 { 1384 error_count = 0; 1385 if (error_name != NULL) 1386 free (error_name); 1387 error_name = xstrdup (name); 1388 } 1389 1390 if (section != NULL) 1391 { 1392 if (error_count < MAX_ERRORS_IN_A_ROW) 1393 { 1394 if (error) 1395 einfo (_("%X%C: undefined reference to `%T'\n"), 1396 abfd, section, address, name); 1397 else 1398 einfo (_("%C: warning: undefined reference to `%T'\n"), 1399 abfd, section, address, name); 1400 } 1401 else if (error_count == MAX_ERRORS_IN_A_ROW) 1402 { 1403 if (error) 1404 einfo (_("%X%D: more undefined references to `%T' follow\n"), 1405 abfd, section, address, name); 1406 else 1407 einfo (_("%D: warning: more undefined references to `%T' follow\n"), 1408 abfd, section, address, name); 1409 } 1410 else if (error) 1411 einfo ("%X"); 1412 } 1413 else 1414 { 1415 if (error_count < MAX_ERRORS_IN_A_ROW) 1416 { 1417 if (error) 1418 einfo (_("%X%B: undefined reference to `%T'\n"), 1419 abfd, name); 1420 else 1421 einfo (_("%B: warning: undefined reference to `%T'\n"), 1422 abfd, name); 1423 } 1424 else if (error_count == MAX_ERRORS_IN_A_ROW) 1425 { 1426 if (error) 1427 einfo (_("%X%B: more undefined references to `%T' follow\n"), 1428 abfd, name); 1429 else 1430 einfo (_("%B: warning: more undefined references to `%T' follow\n"), 1431 abfd, name); 1432 } 1433 else if (error) 1434 einfo ("%X"); 1435 } 1436 1437 return TRUE; 1438} 1439 1440/* Counter to limit the number of relocation overflow error messages 1441 to print. Errors are printed as it is decremented. When it's 1442 called and the counter is zero, a final message is printed 1443 indicating more relocations were omitted. When it gets to -1, no 1444 such errors are printed. If it's initially set to a value less 1445 than -1, all such errors will be printed (--verbose does this). */ 1446 1447int overflow_cutoff_limit = 10; 1448 1449/* This is called when a reloc overflows. */ 1450 1451static bfd_boolean 1452reloc_overflow (struct bfd_link_info *info ATTRIBUTE_UNUSED, 1453 struct bfd_link_hash_entry *entry, 1454 const char *name, 1455 const char *reloc_name, 1456 bfd_vma addend, 1457 bfd *abfd, 1458 asection *section, 1459 bfd_vma address) 1460{ 1461 if (overflow_cutoff_limit == -1) 1462 return TRUE; 1463 1464 einfo ("%X%C:", abfd, section, address); 1465 1466 if (overflow_cutoff_limit >= 0 1467 && overflow_cutoff_limit-- == 0) 1468 { 1469 einfo (_(" additional relocation overflows omitted from the output\n")); 1470 return TRUE; 1471 } 1472 1473 if (entry) 1474 { 1475 while (entry->type == bfd_link_hash_indirect 1476 || entry->type == bfd_link_hash_warning) 1477 entry = entry->u.i.link; 1478 switch (entry->type) 1479 { 1480 case bfd_link_hash_undefined: 1481 case bfd_link_hash_undefweak: 1482 einfo (_(" relocation truncated to fit: %s against undefined symbol `%T'"), 1483 reloc_name, entry->root.string); 1484 break; 1485 case bfd_link_hash_defined: 1486 case bfd_link_hash_defweak: 1487 einfo (_(" relocation truncated to fit: %s against symbol `%T' defined in %A section in %B"), 1488 reloc_name, entry->root.string, 1489 entry->u.def.section, 1490 entry->u.def.section == bfd_abs_section_ptr 1491 ? output_bfd : entry->u.def.section->owner); 1492 break; 1493 default: 1494 abort (); 1495 break; 1496 } 1497 } 1498 else 1499 einfo (_(" relocation truncated to fit: %s against `%T'"), 1500 reloc_name, name); 1501 if (addend != 0) 1502 einfo ("+%v", addend); 1503 einfo ("\n"); 1504 return TRUE; 1505} 1506 1507/* This is called when a dangerous relocation is made. */ 1508 1509static bfd_boolean 1510reloc_dangerous (struct bfd_link_info *info ATTRIBUTE_UNUSED, 1511 const char *message, 1512 bfd *abfd, 1513 asection *section, 1514 bfd_vma address) 1515{ 1516 einfo (_("%X%C: dangerous relocation: %s\n"), 1517 abfd, section, address, message); 1518 return TRUE; 1519} 1520 1521/* This is called when a reloc is being generated attached to a symbol 1522 that is not being output. */ 1523 1524static bfd_boolean 1525unattached_reloc (struct bfd_link_info *info ATTRIBUTE_UNUSED, 1526 const char *name, 1527 bfd *abfd, 1528 asection *section, 1529 bfd_vma address) 1530{ 1531 einfo (_("%X%C: reloc refers to symbol `%T' which is not being output\n"), 1532 abfd, section, address, name); 1533 return TRUE; 1534} 1535 1536/* This is called if link_info.notice_all is set, or when a symbol in 1537 link_info.notice_hash is found. Symbols are put in notice_hash 1538 using the -y option. */ 1539 1540static bfd_boolean 1541notice (struct bfd_link_info *info, 1542 const char *name, 1543 bfd *abfd, 1544 asection *section, 1545 bfd_vma value) 1546{ 1547 if (! info->notice_all 1548 || (info->notice_hash != NULL 1549 && bfd_hash_lookup (info->notice_hash, name, FALSE, FALSE) != NULL)) 1550 { 1551 if (bfd_is_und_section (section)) 1552 einfo ("%B: reference to %s\n", abfd, name); 1553 else 1554 einfo ("%B: definition of %s\n", abfd, name); 1555 } 1556 1557 if (command_line.cref || nocrossref_list != NULL) 1558 add_cref (name, abfd, section, value); 1559 1560 return TRUE; 1561} 1562