diff options
Diffstat (limited to 'ld/ldmain.c')
| -rw-r--r-- | ld/ldmain.c | 1300 |
1 files changed, 0 insertions, 1300 deletions
diff --git a/ld/ldmain.c b/ld/ldmain.c deleted file mode 100644 index 1e710dbb650..00000000000 --- a/ld/ldmain.c +++ /dev/null @@ -1,1300 +0,0 @@ -/* Main program of GNU linker. - Copyright (C) 1991, 92, 93, 94, 95, 96, 97, 98, 1999 - 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 <ctype.h> -#include "libiberty.h" -#include "progress.h" -#include "bfdlink.h" - -#include "ld.h" -#include "ldmain.h" -#include "ldmisc.h" -#include "ldwrite.h" -#include "ldgram.h" -#include "ldexp.h" -#include "ldlang.h" -#include "ldemul.h" -#include "ldlex.h" -#include "ldfile.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 - -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)); -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 - 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); - } - - /* 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; - command_line.force_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.shared = false; - link_info.symbolic = false; - link_info.static_link = false; - link_info.traditional_format = false; - link_info.optimize = false; - link_info.no_undefined = false; - link_info.strip = strip_none; - link_info.discard = discard_none; - link_info.keep_memory = true; - link_info.input_bfds = NULL; - link_info.create_object_symbols_section = 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; - - ldfile_add_arch (""); - - config.make_executable = true; - force_make_executable = false; - config.magic_demand_paged = true; - config.text_read_only = true; - config.make_executable = true; - - emulation = get_emulation (argc, argv); - ldemul_choose_mode (emulation); - default_target = ldemul_choose_target (); - 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")); - } - - /* 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_none) - 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 (had_script == false) - { - /* Read the emulation's appropriate default script. */ - int isfile; - char *s = ldemul_get_script (&isfile); - - if (isfile) - ldfile_open_command_file (s); - else - { - if (trace_file_tries) - { - info_msg (_("using internal linker script:\n")); - info_msg ("==================================================\n"); - info_msg (s); - info_msg ("\n==================================================\n"); - } - lex_string = s; - lex_redirect (s); - } - parser_input = input_script; - yyparse (); - lex_string = NULL; - } - - 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 (config.text_read_only) - { - /* Look for a text section and mark the readonly attribute in it */ - asection *found = bfd_get_section_by_name (output_bfd, ".text"); - - if (found != (asection *) NULL) - { - found->flags |= SEC_READONLY; - } - } - - 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], "-mips4") == 0) - { - /* FIXME: The arguments -mips1, -mips2 and -mips3 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)) - return; /* We've been installed normally. */ - - /* Look for "ldscripts" in the dir where our binary is. */ - end = strrchr (program_name, '/'); - - 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)) - return; /* Don't free dir. */ - - /* Look for "ldscripts" in <the dir where our binary is>/../lib. */ - strcpy (dir + dirlen, "/../lib"); - if (check_for_scripts_dir (dir)) - return; - - free (dir); /* Well, we tried. */ -} - -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. */ - -/*ARGSUSED*/ -static boolean -add_archive_element (info, abfd, name) - struct bfd_link_info *info; - 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, "%-29s %s\n\n", _("Archive member included"), - _("because of file (symbol)")); - 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. */ - -/*ARGSUSED*/ -static boolean -multiple_definition (info, name, obfd, osec, oval, nbfd, nsec, nval) - struct bfd_link_info *info; - 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); - 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. */ - -/*ARGSUSED*/ -static boolean -multiple_common (info, name, obfd, otype, osize, nbfd, ntype, nsize) - struct bfd_link_info *info; - 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. */ - -/*ARGSUSED*/ -static boolean -add_to_set (info, h, reloc, abfd, section, value) - struct bfd_link_info *info; - 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. */ - -/*ARGSUSED*/ -static boolean -warning_callback (info, warning, symbol, abfd, section, address) - struct bfd_link_info *info; - 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. */ - -/*ARGSUSED*/ -static boolean -undefined_symbol (info, name, abfd, section, address) - struct bfd_link_info *info; - const char *name; - bfd *abfd; - asection *section; - bfd_vma address; -{ - 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 = buystring (name); - } - - if (section != NULL) - { - if (error_count < MAX_ERRORS_IN_A_ROW) - einfo (_("%X%C: undefined reference to `%T'\n"), - abfd, section, address, name); - 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 (_("%X%B: undefined reference to `%T'\n"), - abfd, name); - 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. */ - -/*ARGSUSED*/ -static boolean -reloc_overflow (info, name, reloc_name, addend, abfd, section, address) - struct bfd_link_info *info; - 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. */ - -/*ARGSUSED*/ -static boolean -reloc_dangerous (info, message, abfd, section, address) - struct bfd_link_info *info; - 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. */ - -/*ARGSUSED*/ -static boolean -unattached_reloc (info, name, abfd, section, address) - struct bfd_link_info *info; - 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; -} |