| /* Main program of GNU linker. |
| Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, |
| 2002 |
| Free Software Foundation, Inc. |
| Written by Steve Chamberlain steve@cygnus.com |
| |
| This file is part of GLD, the Gnu Linker. |
| |
| GLD is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GLD is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GLD; see the file COPYING. If not, write to the Free |
| Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
| 02111-1307, USA. */ |
| |
| #include "bfd.h" |
| #include "sysdep.h" |
| #include <stdio.h> |
| #include "safe-ctype.h" |
| #include "libiberty.h" |
| #include "progress.h" |
| #include "bfdlink.h" |
| #include "filenames.h" |
| |
| #include "ld.h" |
| #include "ldmain.h" |
| #include "ldmisc.h" |
| #include "ldwrite.h" |
| #include "ldexp.h" |
| #include "ldlang.h" |
| #include <ldgram.h> |
| #include "ldlex.h" |
| #include "ldfile.h" |
| #include "ldemul.h" |
| #include "ldctor.h" |
| |
| /* Somewhere above, sys/stat.h got included . . . . */ |
| #if !defined(S_ISDIR) && defined(S_IFDIR) |
| #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR) |
| #endif |
| |
| #include <string.h> |
| |
| #ifdef HAVE_SBRK |
| #ifdef NEED_DECLARATION_SBRK |
| extern PTR sbrk (); |
| #endif |
| #endif |
| |
| int main PARAMS ((int, char **)); |
| |
| static char *get_emulation PARAMS ((int, char **)); |
| static void set_scripts_dir PARAMS ((void)); |
| |
| /* EXPORTS */ |
| |
| char *default_target; |
| const char *output_filename = "a.out"; |
| |
| /* Name this program was invoked by. */ |
| char *program_name; |
| |
| /* The file that we're creating. */ |
| bfd *output_bfd = 0; |
| |
| /* Set by -G argument, for MIPS ECOFF target. */ |
| int g_switch_value = 8; |
| |
| /* Nonzero means print names of input files as processed. */ |
| boolean trace_files; |
| |
| /* Nonzero means same, but note open failures, too. */ |
| boolean trace_file_tries; |
| |
| /* Nonzero means version number was printed, so exit successfully |
| instead of complaining if no input files are given. */ |
| boolean version_printed; |
| |
| /* Nonzero means link in every member of an archive. */ |
| boolean whole_archive; |
| |
| /* True if we should demangle symbol names. */ |
| boolean demangling; |
| |
| args_type command_line; |
| |
| ld_config_type config; |
| |
| static void remove_output PARAMS ((void)); |
| static boolean check_for_scripts_dir PARAMS ((char *dir)); |
| static boolean add_archive_element PARAMS ((struct bfd_link_info *, bfd *, |
| const char *)); |
| static boolean multiple_definition PARAMS ((struct bfd_link_info *, |
| const char *, |
| bfd *, asection *, bfd_vma, |
| bfd *, asection *, bfd_vma)); |
| static boolean multiple_common PARAMS ((struct bfd_link_info *, |
| const char *, bfd *, |
| enum bfd_link_hash_type, bfd_vma, |
| bfd *, enum bfd_link_hash_type, |
| bfd_vma)); |
| static boolean add_to_set PARAMS ((struct bfd_link_info *, |
| struct bfd_link_hash_entry *, |
| bfd_reloc_code_real_type, |
| bfd *, asection *, bfd_vma)); |
| static boolean constructor_callback PARAMS ((struct bfd_link_info *, |
| boolean constructor, |
| const char *name, |
| bfd *, asection *, bfd_vma)); |
| static boolean warning_callback PARAMS ((struct bfd_link_info *, |
| const char *, const char *, bfd *, |
| asection *, bfd_vma)); |
| static void warning_find_reloc PARAMS ((bfd *, asection *, PTR)); |
| static boolean undefined_symbol PARAMS ((struct bfd_link_info *, |
| const char *, bfd *, |
| asection *, bfd_vma, boolean)); |
| static boolean reloc_overflow PARAMS ((struct bfd_link_info *, const char *, |
| const char *, bfd_vma, |
| bfd *, asection *, bfd_vma)); |
| static boolean reloc_dangerous PARAMS ((struct bfd_link_info *, const char *, |
| bfd *, asection *, bfd_vma)); |
| static boolean unattached_reloc PARAMS ((struct bfd_link_info *, |
| const char *, bfd *, asection *, |
| bfd_vma)); |
| static boolean notice PARAMS ((struct bfd_link_info *, const char *, |
| bfd *, asection *, bfd_vma)); |
| |
| static struct bfd_link_callbacks link_callbacks = { |
| add_archive_element, |
| multiple_definition, |
| multiple_common, |
| add_to_set, |
| constructor_callback, |
| warning_callback, |
| undefined_symbol, |
| reloc_overflow, |
| reloc_dangerous, |
| unattached_reloc, |
| notice |
| }; |
| |
| struct bfd_link_info link_info; |
| |
| static void |
| remove_output () |
| { |
| if (output_filename) |
| { |
| if (output_bfd && output_bfd->iostream) |
| fclose ((FILE *) (output_bfd->iostream)); |
| if (delete_output_file_on_failure) |
| unlink (output_filename); |
| } |
| } |
| |
| int |
| main (argc, argv) |
| int argc; |
| char **argv; |
| { |
| char *emulation; |
| long start_time = get_run_time (); |
| |
| #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES) |
| setlocale (LC_MESSAGES, ""); |
| #endif |
| #if defined (HAVE_SETLOCALE) |
| setlocale (LC_CTYPE, ""); |
| #endif |
| bindtextdomain (PACKAGE, LOCALEDIR); |
| textdomain (PACKAGE); |
| |
| program_name = argv[0]; |
| xmalloc_set_program_name (program_name); |
| |
| START_PROGRESS (program_name, 0); |
| |
| bfd_init (); |
| |
| bfd_set_error_program_name (program_name); |
| |
| xatexit (remove_output); |
| |
| /* Set the default BFD target based on the configured target. Doing |
| this permits the linker to be configured for a particular target, |
| and linked against a shared BFD library which was configured for |
| a different target. The macro TARGET is defined by Makefile. */ |
| if (! bfd_set_default_target (TARGET)) |
| { |
| einfo (_("%X%P: can't set BFD default target to `%s': %E\n"), TARGET); |
| xexit (1); |
| } |
| |
| #if YYDEBUG |
| { |
| extern int yydebug; |
| yydebug = 1; |
| } |
| #endif |
| |
| /* Initialize the data about options. */ |
| trace_files = trace_file_tries = version_printed = false; |
| whole_archive = false; |
| config.build_constructors = true; |
| config.dynamic_link = false; |
| config.has_shared = false; |
| config.split_by_reloc = (unsigned) -1; |
| config.split_by_file = (bfd_size_type) -1; |
| command_line.force_common_definition = false; |
| command_line.inhibit_common_definition = false; |
| command_line.interpreter = NULL; |
| command_line.rpath = NULL; |
| command_line.warn_mismatch = true; |
| command_line.check_section_addresses = true; |
| |
| /* We initialize DEMANGLING based on the environment variable |
| COLLECT_NO_DEMANGLE. The gcc collect2 program will demangle the |
| output of the linker, unless COLLECT_NO_DEMANGLE is set in the |
| environment. Acting the same way here lets us provide the same |
| interface by default. */ |
| demangling = getenv ("COLLECT_NO_DEMANGLE") == NULL; |
| |
| link_info.callbacks = &link_callbacks; |
| link_info.relocateable = false; |
| link_info.emitrelocations = false; |
| link_info.shared = false; |
| link_info.symbolic = false; |
| link_info.export_dynamic = false; |
| link_info.static_link = false; |
| link_info.traditional_format = false; |
| link_info.optimize = false; |
| link_info.no_undefined = false; |
| link_info.allow_shlib_undefined = false; |
| link_info.allow_multiple_definition = false; |
| link_info.allow_undefined_version = true; |
| link_info.strip = strip_none; |
| link_info.discard = discard_sec_merge; |
| link_info.keep_memory = true; |
| link_info.input_bfds = NULL; |
| link_info.create_object_symbols_section = NULL; |
| link_info.gc_sym_list = NULL; |
| link_info.hash = NULL; |
| link_info.keep_hash = NULL; |
| link_info.notice_all = false; |
| link_info.notice_hash = NULL; |
| link_info.wrap_hash = NULL; |
| link_info.mpc860c0 = 0; |
| /* SVR4 linkers seem to set DT_INIT and DT_FINI based on magic _init |
| and _fini symbols. We are compatible. */ |
| link_info.init_function = "_init"; |
| link_info.fini_function = "_fini"; |
| link_info.new_dtags = false; |
| link_info.eh_frame_hdr = false; |
| link_info.flags = (bfd_vma) 0; |
| link_info.flags_1 = (bfd_vma) 0; |
| link_info.pei386_auto_import = false; |
| link_info.pei386_auto_import = -1; |
| link_info.combreloc = true; |
| link_info.spare_dynamic_tags = 5; |
| |
| ldfile_add_arch (""); |
| |
| config.make_executable = true; |
| force_make_executable = false; |
| config.magic_demand_paged = true; |
| config.text_read_only = true; |
| |
| emulation = get_emulation (argc, argv); |
| ldemul_choose_mode (emulation); |
| default_target = ldemul_choose_target (argc, argv); |
| lang_init (); |
| ldemul_before_parse (); |
| lang_has_input_file = false; |
| parse_args (argc, argv); |
| |
| ldemul_set_symbols (); |
| |
| if (link_info.relocateable) |
| { |
| if (command_line.gc_sections) |
| einfo ("%P%F: --gc-sections and -r may not be used together\n"); |
| if (link_info.mpc860c0) |
| einfo (_("%P%F: -r and --mpc860c0 may not be used together\n")); |
| else if (command_line.relax) |
| einfo (_("%P%F: --relax and -r may not be used together\n")); |
| if (link_info.shared) |
| einfo (_("%P%F: -r and -shared may not be used together\n")); |
| } |
| |
| if (! link_info.shared) |
| { |
| if (command_line.filter_shlib) |
| einfo (_("%P%F: -F may not be used without -shared\n")); |
| if (command_line.auxiliary_filters) |
| einfo (_("%P%F: -f may not be used without -shared\n")); |
| } |
| |
| /* Treat ld -r -s as ld -r -S -x (i.e., strip all local symbols). I |
| don't see how else this can be handled, since in this case we |
| must preserve all externally visible symbols. */ |
| if (link_info.relocateable && link_info.strip == strip_all) |
| { |
| link_info.strip = strip_debugger; |
| if (link_info.discard == discard_sec_merge) |
| link_info.discard = discard_all; |
| } |
| |
| /* This essentially adds another -L directory so this must be done after |
| the -L's in argv have been processed. */ |
| set_scripts_dir (); |
| |
| /* If we have not already opened and parsed a linker script |
| read the emulation's appropriate default script. */ |
| if (saved_script_handle == NULL) |
| { |
| int isfile; |
| char *s = ldemul_get_script (&isfile); |
| |
| if (isfile) |
| ldfile_open_command_file (s); |
| else |
| { |
| lex_string = s; |
| lex_redirect (s); |
| } |
| parser_input = input_script; |
| yyparse (); |
| lex_string = NULL; |
| } |
| |
| if (trace_file_tries) |
| { |
| if (saved_script_handle) |
| info_msg (_("using external linker script:")); |
| else |
| info_msg (_("using internal linker script:")); |
| info_msg ("\n==================================================\n"); |
| |
| if (saved_script_handle) |
| { |
| static const int ld_bufsz = 8193; |
| size_t n; |
| char *buf = xmalloc (ld_bufsz); |
| |
| rewind (saved_script_handle); |
| while ((n = fread (buf, 1, ld_bufsz - 1, saved_script_handle)) > 0) |
| { |
| buf[n] = 0; |
| info_msg (buf); |
| } |
| rewind (saved_script_handle); |
| free (buf); |
| } |
| else |
| { |
| int isfile; |
| |
| info_msg (ldemul_get_script (&isfile)); |
| } |
| |
| info_msg ("\n==================================================\n"); |
| } |
| |
| lang_final (); |
| |
| if (lang_has_input_file == false) |
| { |
| if (version_printed) |
| xexit (0); |
| einfo (_("%P%F: no input files\n")); |
| } |
| |
| if (trace_files) |
| { |
| info_msg (_("%P: mode %s\n"), emulation); |
| } |
| |
| ldemul_after_parse (); |
| |
| if (config.map_filename) |
| { |
| if (strcmp (config.map_filename, "-") == 0) |
| { |
| config.map_file = stdout; |
| } |
| else |
| { |
| config.map_file = fopen (config.map_filename, FOPEN_WT); |
| if (config.map_file == (FILE *) NULL) |
| { |
| bfd_set_error (bfd_error_system_call); |
| einfo (_("%P%F: cannot open map file %s: %E\n"), |
| config.map_filename); |
| } |
| } |
| } |
| |
| lang_process (); |
| |
| /* Print error messages for any missing symbols, for any warning |
| symbols, and possibly multiple definitions. */ |
| |
| if (link_info.relocateable) |
| output_bfd->flags &= ~EXEC_P; |
| else |
| output_bfd->flags |= EXEC_P; |
| |
| ldwrite (); |
| |
| if (config.map_file != NULL) |
| lang_map (); |
| if (command_line.cref) |
| output_cref (config.map_file != NULL ? config.map_file : stdout); |
| if (nocrossref_list != NULL) |
| check_nocrossrefs (); |
| |
| /* Even if we're producing relocateable output, some non-fatal errors should |
| be reported in the exit status. (What non-fatal errors, if any, do we |
| want to ignore for relocateable output?) */ |
| |
| if (config.make_executable == false && force_make_executable == false) |
| { |
| if (trace_files == true) |
| { |
| einfo (_("%P: link errors found, deleting executable `%s'\n"), |
| output_filename); |
| } |
| |
| /* The file will be removed by remove_output. */ |
| |
| xexit (1); |
| } |
| else |
| { |
| if (! bfd_close (output_bfd)) |
| einfo (_("%F%B: final close failed: %E\n"), output_bfd); |
| |
| /* If the --force-exe-suffix is enabled, and we're making an |
| executable file and it doesn't end in .exe, copy it to one |
| which does. */ |
| if (! link_info.relocateable && command_line.force_exe_suffix) |
| { |
| int len = strlen (output_filename); |
| if (len < 4 |
| || (strcasecmp (output_filename + len - 4, ".exe") != 0 |
| && strcasecmp (output_filename + len - 4, ".dll") != 0)) |
| { |
| FILE *src; |
| FILE *dst; |
| const int bsize = 4096; |
| char *buf = xmalloc (bsize); |
| int l; |
| char *dst_name = xmalloc (len + 5); |
| strcpy (dst_name, output_filename); |
| strcat (dst_name, ".exe"); |
| src = fopen (output_filename, FOPEN_RB); |
| dst = fopen (dst_name, FOPEN_WB); |
| |
| if (!src) |
| einfo (_("%X%P: unable to open for source of copy `%s'\n"), output_filename); |
| if (!dst) |
| einfo (_("%X%P: unable to open for destination of copy `%s'\n"), dst_name); |
| while ((l = fread (buf, 1, bsize, src)) > 0) |
| { |
| int done = fwrite (buf, 1, l, dst); |
| if (done != l) |
| { |
| einfo (_("%P: Error writing file `%s'\n"), dst_name); |
| } |
| } |
| fclose (src); |
| if (fclose (dst) == EOF) |
| { |
| einfo (_("%P: Error closing file `%s'\n"), dst_name); |
| } |
| free (dst_name); |
| free (buf); |
| } |
| } |
| } |
| |
| END_PROGRESS (program_name); |
| |
| if (config.stats) |
| { |
| #ifdef HAVE_SBRK |
| char *lim = (char *) sbrk (0); |
| #endif |
| long run_time = get_run_time () - start_time; |
| |
| fprintf (stderr, _("%s: total time in link: %ld.%06ld\n"), |
| program_name, run_time / 1000000, run_time % 1000000); |
| #ifdef HAVE_SBRK |
| fprintf (stderr, _("%s: data size %ld\n"), program_name, |
| (long) (lim - (char *) &environ)); |
| #endif |
| } |
| |
| /* Prevent remove_output from doing anything, after a successful link. */ |
| output_filename = NULL; |
| |
| xexit (0); |
| return 0; |
| } |
| |
| /* We need to find any explicitly given emulation in order to initialize the |
| state that's needed by the lex&yacc argument parser (parse_args). */ |
| |
| static char * |
| get_emulation (argc, argv) |
| int argc; |
| char **argv; |
| { |
| char *emulation; |
| int i; |
| |
| emulation = getenv (EMULATION_ENVIRON); |
| if (emulation == NULL) |
| emulation = DEFAULT_EMULATION; |
| |
| for (i = 1; i < argc; i++) |
| { |
| if (!strncmp (argv[i], "-m", 2)) |
| { |
| if (argv[i][2] == '\0') |
| { |
| /* -m EMUL */ |
| if (i < argc - 1) |
| { |
| emulation = argv[i + 1]; |
| i++; |
| } |
| else |
| { |
| einfo (_("%P%F: missing argument to -m\n")); |
| } |
| } |
| else if (strcmp (argv[i], "-mips1") == 0 |
| || strcmp (argv[i], "-mips2") == 0 |
| || strcmp (argv[i], "-mips3") == 0 |
| || strcmp (argv[i], "-mips32") == 0 |
| || strcmp (argv[i], "-mips64") == 0 |
| || strcmp (argv[i], "-mips4") == 0 |
| || strcmp (argv[i], "-mips5") == 0) |
| { |
| /* FIXME: The arguments -mips1, -mips2, -mips3, etc. are |
| passed to the linker by some MIPS compilers. They |
| generally tell the linker to use a slightly different |
| library path. Perhaps someday these should be |
| implemented as emulations; until then, we just ignore |
| the arguments and hope that nobody ever creates |
| emulations named ips1, ips2 or ips3. */ |
| } |
| else if (strcmp (argv[i], "-m486") == 0) |
| { |
| /* FIXME: The argument -m486 is passed to the linker on |
| some Linux systems. Hope that nobody creates an |
| emulation named 486. */ |
| } |
| else |
| { |
| /* -mEMUL */ |
| emulation = &argv[i][2]; |
| } |
| } |
| } |
| |
| return emulation; |
| } |
| |
| /* If directory DIR contains an "ldscripts" subdirectory, |
| add DIR to the library search path and return true, |
| else return false. */ |
| |
| static boolean |
| check_for_scripts_dir (dir) |
| char *dir; |
| { |
| size_t dirlen; |
| char *buf; |
| struct stat s; |
| boolean res; |
| |
| dirlen = strlen (dir); |
| /* sizeof counts the terminating NUL. */ |
| buf = (char *) xmalloc (dirlen + sizeof ("/ldscripts")); |
| sprintf (buf, "%s/ldscripts", dir); |
| |
| res = stat (buf, &s) == 0 && S_ISDIR (s.st_mode); |
| free (buf); |
| if (res) |
| ldfile_add_library_path (dir, false); |
| return res; |
| } |
| |
| /* Set the default directory for finding script files. |
| Libraries will be searched for here too, but that's ok. |
| We look for the "ldscripts" directory in: |
| |
| SCRIPTDIR (passed from Makefile) |
| the dir where this program is (for using it from the build tree) |
| the dir where this program is/../lib (for installing the tool suite elsewhere) */ |
| |
| static void |
| set_scripts_dir () |
| { |
| char *end, *dir; |
| size_t dirlen; |
| |
| if (check_for_scripts_dir (SCRIPTDIR)) |
| /* We've been installed normally. */ |
| return; |
| |
| /* Look for "ldscripts" in the dir where our binary is. */ |
| end = strrchr (program_name, '/'); |
| #ifdef HAVE_DOS_BASED_FILE_SYSTEM |
| { |
| /* We could have \foo\bar, or /foo\bar. */ |
| char *bslash = strrchr (program_name, '\\'); |
| if (end == NULL || (bslash != NULL && bslash > end)) |
| end = bslash; |
| } |
| #endif |
| |
| if (end == NULL) |
| { |
| /* Don't look for ldscripts in the current directory. There is |
| too much potential for confusion. */ |
| return; |
| } |
| |
| dirlen = end - program_name; |
| /* Make a copy of program_name in dir. |
| Leave room for later "/../lib". */ |
| dir = (char *) xmalloc (dirlen + 8); |
| strncpy (dir, program_name, dirlen); |
| dir[dirlen] = '\0'; |
| |
| if (check_for_scripts_dir (dir)) |
| /* Don't free dir. */ |
| return; |
| |
| /* Look for "ldscripts" in <the dir where our binary is>/../lib. */ |
| strcpy (dir + dirlen, "/../lib"); |
| if (check_for_scripts_dir (dir)) |
| return; |
| |
| /* Well, we tried. */ |
| free (dir); |
| } |
| |
| void |
| add_ysym (name) |
| const char *name; |
| { |
| if (link_info.notice_hash == (struct bfd_hash_table *) NULL) |
| { |
| link_info.notice_hash = ((struct bfd_hash_table *) |
| xmalloc (sizeof (struct bfd_hash_table))); |
| if (! bfd_hash_table_init_n (link_info.notice_hash, |
| bfd_hash_newfunc, |
| 61)) |
| einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
| } |
| |
| if (bfd_hash_lookup (link_info.notice_hash, name, true, true) |
| == (struct bfd_hash_entry *) NULL) |
| einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); |
| } |
| |
| /* Record a symbol to be wrapped, from the --wrap option. */ |
| |
| void |
| add_wrap (name) |
| const char *name; |
| { |
| if (link_info.wrap_hash == NULL) |
| { |
| link_info.wrap_hash = ((struct bfd_hash_table *) |
| xmalloc (sizeof (struct bfd_hash_table))); |
| if (! bfd_hash_table_init_n (link_info.wrap_hash, |
| bfd_hash_newfunc, |
| 61)) |
| einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
| } |
| if (bfd_hash_lookup (link_info.wrap_hash, name, true, true) == NULL) |
| einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); |
| } |
| |
| /* Handle the -retain-symbols-file option. */ |
| |
| void |
| add_keepsyms_file (filename) |
| const char *filename; |
| { |
| FILE *file; |
| char *buf; |
| size_t bufsize; |
| int c; |
| |
| if (link_info.strip == strip_some) |
| einfo (_("%X%P: error: duplicate retain-symbols-file\n")); |
| |
| file = fopen (filename, "r"); |
| if (file == (FILE *) NULL) |
| { |
| bfd_set_error (bfd_error_system_call); |
| einfo ("%X%P: %s: %E\n", filename); |
| return; |
| } |
| |
| link_info.keep_hash = ((struct bfd_hash_table *) |
| xmalloc (sizeof (struct bfd_hash_table))); |
| if (! bfd_hash_table_init (link_info.keep_hash, bfd_hash_newfunc)) |
| einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); |
| |
| bufsize = 100; |
| buf = (char *) xmalloc (bufsize); |
| |
| c = getc (file); |
| while (c != EOF) |
| { |
| while (ISSPACE (c)) |
| c = getc (file); |
| |
| if (c != EOF) |
| { |
| size_t len = 0; |
| |
| while (! ISSPACE (c) && c != EOF) |
| { |
| buf[len] = c; |
| ++len; |
| if (len >= bufsize) |
| { |
| bufsize *= 2; |
| buf = xrealloc (buf, bufsize); |
| } |
| c = getc (file); |
| } |
| |
| buf[len] = '\0'; |
| |
| if (bfd_hash_lookup (link_info.keep_hash, buf, true, true) |
| == (struct bfd_hash_entry *) NULL) |
| einfo (_("%P%F: bfd_hash_lookup for insertion failed: %E\n")); |
| } |
| } |
| |
| if (link_info.strip != strip_none) |
| einfo (_("%P: `-retain-symbols-file' overrides `-s' and `-S'\n")); |
| |
| link_info.strip = strip_some; |
| } |
| |
| /* Callbacks from the BFD linker routines. */ |
| |
| /* This is called when BFD has decided to include an archive member in |
| a link. */ |
| |
| static boolean |
| add_archive_element (info, abfd, name) |
| struct bfd_link_info *info ATTRIBUTE_UNUSED; |
| bfd *abfd; |
| const char *name; |
| { |
| lang_input_statement_type *input; |
| |
| input = ((lang_input_statement_type *) |
| xmalloc (sizeof (lang_input_statement_type))); |
| input->filename = abfd->filename; |
| input->local_sym_name = abfd->filename; |
| input->the_bfd = abfd; |
| input->asymbols = NULL; |
| input->next = NULL; |
| input->just_syms_flag = false; |
| input->loaded = false; |
| input->search_dirs_flag = false; |
| |
| /* FIXME: The following fields are not set: header.next, |
| header.type, closed, passive_position, symbol_count, |
| next_real_file, is_archive, target, real. This bit of code is |
| from the old decode_library_subfile function. I don't know |
| whether any of those fields matters. */ |
| |
| ldlang_add_file (input); |
| |
| if (config.map_file != (FILE *) NULL) |
| { |
| static boolean header_printed; |
| struct bfd_link_hash_entry *h; |
| bfd *from; |
| int len; |
| |
| h = bfd_link_hash_lookup (link_info.hash, name, false, false, true); |
| |
| if (h == NULL) |
| from = NULL; |
| else |
| { |
| switch (h->type) |
| { |
| default: |
| from = NULL; |
| break; |
| |
| case bfd_link_hash_defined: |
| case bfd_link_hash_defweak: |
| from = h->u.def.section->owner; |
| break; |
| |
| case bfd_link_hash_undefined: |
| case bfd_link_hash_undefweak: |
| from = h->u.undef.abfd; |
| break; |
| |
| case bfd_link_hash_common: |
| from = h->u.c.p->section->owner; |
| break; |
| } |
| } |
| |
| if (! header_printed) |
| { |
| char buf[100]; |
| |
| sprintf (buf, _("Archive member included because of file (symbol)\n\n")); |
| minfo ("%s", buf); |
| header_printed = true; |
| } |
| |
| if (bfd_my_archive (abfd) == NULL) |
| { |
| minfo ("%s", bfd_get_filename (abfd)); |
| len = strlen (bfd_get_filename (abfd)); |
| } |
| else |
| { |
| minfo ("%s(%s)", bfd_get_filename (bfd_my_archive (abfd)), |
| bfd_get_filename (abfd)); |
| len = (strlen (bfd_get_filename (bfd_my_archive (abfd))) |
| + strlen (bfd_get_filename (abfd)) |
| + 2); |
| } |
| |
| if (len >= 29) |
| { |
| print_nl (); |
| len = 0; |
| } |
| while (len < 30) |
| { |
| print_space (); |
| ++len; |
| } |
| |
| if (from != NULL) |
| minfo ("%B ", from); |
| if (h != NULL) |
| minfo ("(%T)\n", h->root.string); |
| else |
| minfo ("(%s)\n", name); |
| } |
| |
| if (trace_files || trace_file_tries) |
| info_msg ("%I\n", input); |
| |
| return true; |
| } |
| |
| /* This is called when BFD has discovered a symbol which is defined |
| multiple times. */ |
| |
| static boolean |
| multiple_definition (info, name, obfd, osec, oval, nbfd, nsec, nval) |
| struct bfd_link_info *info ATTRIBUTE_UNUSED; |
| const char *name; |
| bfd *obfd; |
| asection *osec; |
| bfd_vma oval; |
| bfd *nbfd; |
| asection *nsec; |
| bfd_vma nval; |
| { |
| /* If either section has the output_section field set to |
| bfd_abs_section_ptr, it means that the section is being |
| discarded, and this is not really a multiple definition at all. |
| FIXME: It would be cleaner to somehow ignore symbols defined in |
| sections which are being discarded. */ |
| if ((osec->output_section != NULL |
| && ! bfd_is_abs_section (osec) |
| && bfd_is_abs_section (osec->output_section)) |
| || (nsec->output_section != NULL |
| && ! bfd_is_abs_section (nsec) |
| && bfd_is_abs_section (nsec->output_section))) |
| return true; |
| |
| einfo (_("%X%C: multiple definition of `%T'\n"), |
| nbfd, nsec, nval, name); |
| if (obfd != (bfd *) NULL) |
| einfo (_("%D: first defined here\n"), obfd, osec, oval); |
| |
| if (command_line.relax) |
| { |
| einfo (_("%P: Disabling relaxation: it will not work with multiple definitions\n")); |
| command_line.relax = 0; |
| } |
| |
| return true; |
| } |
| |
| /* This is called when there is a definition of a common symbol, or |
| when a common symbol is found for a symbol that is already defined, |
| or when two common symbols are found. We only do something if |
| -warn-common was used. */ |
| |
| static boolean |
| multiple_common (info, name, obfd, otype, osize, nbfd, ntype, nsize) |
| struct bfd_link_info *info ATTRIBUTE_UNUSED; |
| const char *name; |
| bfd *obfd; |
| enum bfd_link_hash_type otype; |
| bfd_vma osize; |
| bfd *nbfd; |
| enum bfd_link_hash_type ntype; |
| bfd_vma nsize; |
| { |
| if (! config.warn_common) |
| return true; |
| |
| if (ntype == bfd_link_hash_defined |
| || ntype == bfd_link_hash_defweak |
| || ntype == bfd_link_hash_indirect) |
| { |
| ASSERT (otype == bfd_link_hash_common); |
| einfo (_("%B: warning: definition of `%T' overriding common\n"), |
| nbfd, name); |
| if (obfd != NULL) |
| einfo (_("%B: warning: common is here\n"), obfd); |
| } |
| else if (otype == bfd_link_hash_defined |
| || otype == bfd_link_hash_defweak |
| || otype == bfd_link_hash_indirect) |
| { |
| ASSERT (ntype == bfd_link_hash_common); |
| einfo (_("%B: warning: common of `%T' overridden by definition\n"), |
| nbfd, name); |
| if (obfd != NULL) |
| einfo (_("%B: warning: defined here\n"), obfd); |
| } |
| else |
| { |
| ASSERT (otype == bfd_link_hash_common && ntype == bfd_link_hash_common); |
| if (osize > nsize) |
| { |
| einfo (_("%B: warning: common of `%T' overridden by larger common\n"), |
| nbfd, name); |
| if (obfd != NULL) |
| einfo (_("%B: warning: larger common is here\n"), obfd); |
| } |
| else if (nsize > osize) |
| { |
| einfo (_("%B: warning: common of `%T' overriding smaller common\n"), |
| nbfd, name); |
| if (obfd != NULL) |
| einfo (_("%B: warning: smaller common is here\n"), obfd); |
| } |
| else |
| { |
| einfo (_("%B: warning: multiple common of `%T'\n"), nbfd, name); |
| if (obfd != NULL) |
| einfo (_("%B: warning: previous common is here\n"), obfd); |
| } |
| } |
| |
| return true; |
| } |
| |
| /* This is called when BFD has discovered a set element. H is the |
| entry in the linker hash table for the set. SECTION and VALUE |
| represent a value which should be added to the set. */ |
| |
| static boolean |
| add_to_set (info, h, reloc, abfd, section, value) |
| struct bfd_link_info *info ATTRIBUTE_UNUSED; |
| struct bfd_link_hash_entry *h; |
| bfd_reloc_code_real_type reloc; |
| bfd *abfd; |
| asection *section; |
| bfd_vma value; |
| { |
| if (config.warn_constructors) |
| einfo (_("%P: warning: global constructor %s used\n"), |
| h->root.string); |
| |
| if (! config.build_constructors) |
| return true; |
| |
| ldctor_add_set_entry (h, reloc, (const char *) NULL, section, value); |
| |
| if (h->type == bfd_link_hash_new) |
| { |
| h->type = bfd_link_hash_undefined; |
| h->u.undef.abfd = abfd; |
| /* We don't call bfd_link_add_undef to add this to the list of |
| undefined symbols because we are going to define it |
| ourselves. */ |
| } |
| |
| return true; |
| } |
| |
| /* This is called when BFD has discovered a constructor. This is only |
| called for some object file formats--those which do not handle |
| constructors in some more clever fashion. This is similar to |
| adding an element to a set, but less general. */ |
| |
| static boolean |
| constructor_callback (info, constructor, name, abfd, section, value) |
| struct bfd_link_info *info; |
| boolean constructor; |
| const char *name; |
| bfd *abfd; |
| asection *section; |
| bfd_vma value; |
| { |
| char *s; |
| struct bfd_link_hash_entry *h; |
| char set_name[1 + sizeof "__CTOR_LIST__"]; |
| |
| if (config.warn_constructors) |
| einfo (_("%P: warning: global constructor %s used\n"), name); |
| |
| if (! config.build_constructors) |
| return true; |
| |
| /* Ensure that BFD_RELOC_CTOR exists now, so that we can give a |
| useful error message. */ |
| if (bfd_reloc_type_lookup (output_bfd, BFD_RELOC_CTOR) == NULL |
| && (link_info.relocateable |
| || bfd_reloc_type_lookup (abfd, BFD_RELOC_CTOR) == NULL)) |
| einfo (_("%P%F: BFD backend error: BFD_RELOC_CTOR unsupported\n")); |
| |
| s = set_name; |
| if (bfd_get_symbol_leading_char (abfd) != '\0') |
| *s++ = bfd_get_symbol_leading_char (abfd); |
| if (constructor) |
| strcpy (s, "__CTOR_LIST__"); |
| else |
| strcpy (s, "__DTOR_LIST__"); |
| |
| h = bfd_link_hash_lookup (info->hash, set_name, true, true, true); |
| if (h == (struct bfd_link_hash_entry *) NULL) |
| einfo (_("%P%F: bfd_link_hash_lookup failed: %E\n")); |
| if (h->type == bfd_link_hash_new) |
| { |
| h->type = bfd_link_hash_undefined; |
| h->u.undef.abfd = abfd; |
| /* We don't call bfd_link_add_undef to add this to the list of |
| undefined symbols because we are going to define it |
| ourselves. */ |
| } |
| |
| ldctor_add_set_entry (h, BFD_RELOC_CTOR, name, section, value); |
| return true; |
| } |
| |
| /* A structure used by warning_callback to pass information through |
| bfd_map_over_sections. */ |
| |
| struct warning_callback_info { |
| boolean found; |
| const char *warning; |
| const char *symbol; |
| asymbol **asymbols; |
| }; |
| |
| /* This is called when there is a reference to a warning symbol. */ |
| |
| static boolean |
| warning_callback (info, warning, symbol, abfd, section, address) |
| struct bfd_link_info *info ATTRIBUTE_UNUSED; |
| const char *warning; |
| const char *symbol; |
| bfd *abfd; |
| asection *section; |
| bfd_vma address; |
| { |
| /* This is a hack to support warn_multiple_gp. FIXME: This should |
| have a cleaner interface, but what? */ |
| if (! config.warn_multiple_gp |
| && strcmp (warning, "using multiple gp values") == 0) |
| return true; |
| |
| if (section != NULL) |
| einfo ("%C: %s\n", abfd, section, address, warning); |
| else if (abfd == NULL) |
| einfo ("%P: %s\n", warning); |
| else if (symbol == NULL) |
| einfo ("%B: %s\n", abfd, warning); |
| else |
| { |
| lang_input_statement_type *entry; |
| asymbol **asymbols; |
| struct warning_callback_info info; |
| |
| /* Look through the relocs to see if we can find a plausible |
| address. */ |
| |
| entry = (lang_input_statement_type *) abfd->usrdata; |
| if (entry != NULL && entry->asymbols != NULL) |
| asymbols = entry->asymbols; |
| else |
| { |
| long symsize; |
| long symbol_count; |
| |
| symsize = bfd_get_symtab_upper_bound (abfd); |
| if (symsize < 0) |
| einfo (_("%B%F: could not read symbols: %E\n"), abfd); |
| asymbols = (asymbol **) xmalloc (symsize); |
| symbol_count = bfd_canonicalize_symtab (abfd, asymbols); |
| if (symbol_count < 0) |
| einfo (_("%B%F: could not read symbols: %E\n"), abfd); |
| if (entry != NULL) |
| { |
| entry->asymbols = asymbols; |
| entry->symbol_count = symbol_count; |
| } |
| } |
| |
| info.found = false; |
| info.warning = warning; |
| info.symbol = symbol; |
| info.asymbols = asymbols; |
| bfd_map_over_sections (abfd, warning_find_reloc, (PTR) &info); |
| |
| if (! info.found) |
| einfo ("%B: %s\n", abfd, warning); |
| |
| if (entry == NULL) |
| free (asymbols); |
| } |
| |
| return true; |
| } |
| |
| /* This is called by warning_callback for each section. It checks the |
| relocs of the section to see if it can find a reference to the |
| symbol which triggered the warning. If it can, it uses the reloc |
| to give an error message with a file and line number. */ |
| |
| static void |
| warning_find_reloc (abfd, sec, iarg) |
| bfd *abfd; |
| asection *sec; |
| PTR iarg; |
| { |
| struct warning_callback_info *info = (struct warning_callback_info *) iarg; |
| long relsize; |
| arelent **relpp; |
| long relcount; |
| arelent **p, **pend; |
| |
| if (info->found) |
| return; |
| |
| relsize = bfd_get_reloc_upper_bound (abfd, sec); |
| if (relsize < 0) |
| einfo (_("%B%F: could not read relocs: %E\n"), abfd); |
| if (relsize == 0) |
| return; |
| |
| relpp = (arelent **) xmalloc (relsize); |
| relcount = bfd_canonicalize_reloc (abfd, sec, relpp, info->asymbols); |
| if (relcount < 0) |
| einfo (_("%B%F: could not read relocs: %E\n"), abfd); |
| |
| p = relpp; |
| pend = p + relcount; |
| for (; p < pend && *p != NULL; p++) |
| { |
| arelent *q = *p; |
| |
| if (q->sym_ptr_ptr != NULL |
| && *q->sym_ptr_ptr != NULL |
| && strcmp (bfd_asymbol_name (*q->sym_ptr_ptr), info->symbol) == 0) |
| { |
| /* We found a reloc for the symbol we are looking for. */ |
| einfo ("%C: %s\n", abfd, sec, q->address, info->warning); |
| info->found = true; |
| break; |
| } |
| } |
| |
| free (relpp); |
| } |
| |
| /* This is called when an undefined symbol is found. */ |
| |
| static boolean |
| undefined_symbol (info, name, abfd, section, address, fatal) |
| struct bfd_link_info *info ATTRIBUTE_UNUSED; |
| const char *name; |
| bfd *abfd; |
| asection *section; |
| bfd_vma address; |
| boolean fatal ATTRIBUTE_UNUSED; |
| { |
| static char *error_name; |
| static unsigned int error_count; |
| |
| #define MAX_ERRORS_IN_A_ROW 5 |
| |
| if (config.warn_once) |
| { |
| static struct bfd_hash_table *hash; |
| |
| /* Only warn once about a particular undefined symbol. */ |
| |
| if (hash == NULL) |
| { |
| hash = ((struct bfd_hash_table *) |
| xmalloc (sizeof (struct bfd_hash_table))); |
| if (! bfd_hash_table_init (hash, bfd_hash_newfunc)) |
| einfo (_("%F%P: bfd_hash_table_init failed: %E\n")); |
| } |
| |
| if (bfd_hash_lookup (hash, name, false, false) != NULL) |
| return true; |
| |
| if (bfd_hash_lookup (hash, name, true, true) == NULL) |
| einfo (_("%F%P: bfd_hash_lookup failed: %E\n")); |
| } |
| |
| /* We never print more than a reasonable number of errors in a row |
| for a single symbol. */ |
| if (error_name != (char *) NULL |
| && strcmp (name, error_name) == 0) |
| ++error_count; |
| else |
| { |
| error_count = 0; |
| if (error_name != (char *) NULL) |
| free (error_name); |
| error_name = xstrdup (name); |
| } |
| |
| if (section != NULL) |
| { |
| if (error_count < MAX_ERRORS_IN_A_ROW) |
| { |
| einfo (_("%C: undefined reference to `%T'\n"), |
| abfd, section, address, name); |
| if (fatal) |
| einfo ("%X"); |
| } |
| else if (error_count == MAX_ERRORS_IN_A_ROW) |
| einfo (_("%D: more undefined references to `%T' follow\n"), |
| abfd, section, address, name); |
| } |
| else |
| { |
| if (error_count < MAX_ERRORS_IN_A_ROW) |
| { |
| einfo (_("%B: undefined reference to `%T'\n"), |
| abfd, name); |
| if (fatal) |
| einfo ("%X"); |
| } |
| else if (error_count == MAX_ERRORS_IN_A_ROW) |
| einfo (_("%B: more undefined references to `%T' follow\n"), |
| abfd, name); |
| } |
| |
| return true; |
| } |
| |
| /* This is called when a reloc overflows. */ |
| |
| static boolean |
| reloc_overflow (info, name, reloc_name, addend, abfd, section, address) |
| struct bfd_link_info *info ATTRIBUTE_UNUSED; |
| const char *name; |
| const char *reloc_name; |
| bfd_vma addend; |
| bfd *abfd; |
| asection *section; |
| bfd_vma address; |
| { |
| if (abfd == (bfd *) NULL) |
| einfo (_("%P%X: generated")); |
| else |
| einfo ("%X%C:", abfd, section, address); |
| einfo (_(" relocation truncated to fit: %s %T"), reloc_name, name); |
| if (addend != 0) |
| einfo ("+%v", addend); |
| einfo ("\n"); |
| return true; |
| } |
| |
| /* This is called when a dangerous relocation is made. */ |
| |
| static boolean |
| reloc_dangerous (info, message, abfd, section, address) |
| struct bfd_link_info *info ATTRIBUTE_UNUSED; |
| const char *message; |
| bfd *abfd; |
| asection *section; |
| bfd_vma address; |
| { |
| if (abfd == (bfd *) NULL) |
| einfo (_("%P%X: generated")); |
| else |
| einfo ("%X%C:", abfd, section, address); |
| einfo (_("dangerous relocation: %s\n"), message); |
| return true; |
| } |
| |
| /* This is called when a reloc is being generated attached to a symbol |
| that is not being output. */ |
| |
| static boolean |
| unattached_reloc (info, name, abfd, section, address) |
| struct bfd_link_info *info ATTRIBUTE_UNUSED; |
| const char *name; |
| bfd *abfd; |
| asection *section; |
| bfd_vma address; |
| { |
| if (abfd == (bfd *) NULL) |
| einfo (_("%P%X: generated")); |
| else |
| einfo ("%X%C:", abfd, section, address); |
| einfo (_(" reloc refers to symbol `%T' which is not being output\n"), name); |
| return true; |
| } |
| |
| /* This is called if link_info.notice_all is set, or when a symbol in |
| link_info.notice_hash is found. Symbols are put in notice_hash |
| using the -y option. */ |
| |
| static boolean |
| notice (info, name, abfd, section, value) |
| struct bfd_link_info *info; |
| const char *name; |
| bfd *abfd; |
| asection *section; |
| bfd_vma value; |
| { |
| if (! info->notice_all |
| || (info->notice_hash != NULL |
| && bfd_hash_lookup (info->notice_hash, name, false, false) != NULL)) |
| { |
| if (bfd_is_und_section (section)) |
| einfo ("%B: reference to %s\n", abfd, name); |
| else |
| einfo ("%B: definition of %s\n", abfd, name); |
| } |
| |
| if (command_line.cref || nocrossref_list != NULL) |
| add_cref (name, abfd, section, value); |
| |
| return true; |
| } |