938 lines
24 KiB
C
938 lines
24 KiB
C
/* Main program of GNU linker.
|
||
Copyright (C) 1991, 92, 93, 94 Free Software Foundation, Inc.
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Written by Steve Chamberlain steve@cygnus.com
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This file is part of GLD, the Gnu Linker.
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GLD is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GLD is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GLD; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include "bfd.h"
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#include "sysdep.h"
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#include <stdio.h>
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#include "libiberty.h"
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#include "bfdlink.h"
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#include "config.h"
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#include "ld.h"
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#include "ldmain.h"
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#include "ldmisc.h"
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#include "ldwrite.h"
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#include "ldgram.h"
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#include "ldexp.h"
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#include "ldlang.h"
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#include "ldemul.h"
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#include "ldlex.h"
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#include "ldfile.h"
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#include "ldctor.h"
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/* Somewhere above, sys/stat.h got included . . . . */
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#if !defined(S_ISDIR) && defined(S_IFDIR)
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#define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
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#endif
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#include <string.h>
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static char *get_emulation PARAMS ((int, char **));
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static void set_scripts_dir PARAMS ((void));
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/* EXPORTS */
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char *default_target;
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const char *output_filename = "a.out";
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/* Name this program was invoked by. */
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char *program_name;
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||
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/* The file that we're creating */
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bfd *output_bfd = 0;
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/* Set by -G argument, for MIPS ECOFF target. */
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int g_switch_value = 8;
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/* Nonzero means print names of input files as processed. */
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boolean trace_files;
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/* Nonzero means same, but note open failures, too. */
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boolean trace_file_tries;
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/* Nonzero means version number was printed, so exit successfully
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instead of complaining if no input files are given. */
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boolean version_printed;
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args_type command_line;
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ld_config_type config;
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static boolean check_for_scripts_dir PARAMS ((char *dir));
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static boolean add_archive_element PARAMS ((struct bfd_link_info *, bfd *,
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const char *));
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static boolean multiple_definition PARAMS ((struct bfd_link_info *,
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const char *,
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bfd *, asection *, bfd_vma,
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bfd *, asection *, bfd_vma));
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static boolean multiple_common PARAMS ((struct bfd_link_info *,
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const char *, bfd *,
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enum bfd_link_hash_type, bfd_vma,
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bfd *, enum bfd_link_hash_type,
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bfd_vma));
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static boolean add_to_set PARAMS ((struct bfd_link_info *,
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struct bfd_link_hash_entry *,
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bfd_reloc_code_real_type,
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bfd *, asection *, bfd_vma));
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static boolean constructor_callback PARAMS ((struct bfd_link_info *,
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boolean constructor,
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const char *name,
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bfd *, asection *, bfd_vma));
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static boolean warning_callback PARAMS ((struct bfd_link_info *,
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const char *));
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static boolean undefined_symbol PARAMS ((struct bfd_link_info *,
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const char *, bfd *,
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asection *, bfd_vma));
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static boolean reloc_overflow PARAMS ((struct bfd_link_info *, const char *,
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const char *, bfd_vma,
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bfd *, asection *, bfd_vma));
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static boolean reloc_dangerous PARAMS ((struct bfd_link_info *, const char *,
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bfd *, asection *, bfd_vma));
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static boolean unattached_reloc PARAMS ((struct bfd_link_info *,
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const char *, bfd *, asection *,
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bfd_vma));
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static boolean notice_ysym PARAMS ((struct bfd_link_info *, const char *,
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bfd *, asection *, bfd_vma));
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static struct bfd_link_callbacks link_callbacks =
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{
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add_archive_element,
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multiple_definition,
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multiple_common,
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add_to_set,
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constructor_callback,
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warning_callback,
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undefined_symbol,
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reloc_overflow,
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reloc_dangerous,
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unattached_reloc,
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notice_ysym
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};
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struct bfd_link_info link_info;
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static void
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remove_output ()
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{
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if (output_filename)
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{
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if (output_bfd && output_bfd->iostream)
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fclose((FILE *)(output_bfd->iostream));
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if (delete_output_file_on_failure)
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unlink (output_filename);
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}
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}
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int
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main (argc, argv)
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int argc;
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char **argv;
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{
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char *emulation;
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long start_time = get_run_time ();
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program_name = argv[0];
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xmalloc_set_program_name (program_name);
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bfd_init ();
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xatexit (remove_output);
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/* Initialize the data about options. */
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trace_files = trace_file_tries = version_printed = false;
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config.traditional_format = false;
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config.build_constructors = true;
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config.dynamic_link = false;
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command_line.force_common_definition = false;
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command_line.interpreter = NULL;
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command_line.rpath = NULL;
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link_info.callbacks = &link_callbacks;
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link_info.relocateable = false;
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link_info.shared = false;
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link_info.strip = strip_none;
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link_info.discard = discard_none;
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link_info.lprefix_len = 1;
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link_info.lprefix = "L";
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link_info.keep_memory = true;
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link_info.input_bfds = NULL;
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link_info.create_object_symbols_section = NULL;
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link_info.hash = NULL;
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link_info.keep_hash = NULL;
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link_info.notice_hash = NULL;
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ldfile_add_arch ("");
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config.make_executable = true;
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force_make_executable = false;
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config.magic_demand_paged = true;
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config.text_read_only = true;
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config.make_executable = true;
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emulation = get_emulation (argc, argv);
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ldemul_choose_mode (emulation);
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default_target = ldemul_choose_target ();
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lang_init ();
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ldemul_before_parse ();
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lang_has_input_file = false;
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parse_args (argc, argv);
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if (link_info.relocateable)
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{
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if (command_line.relax)
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einfo ("%P%F: -relax and -r may not be used together\n");
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if (config.dynamic_link)
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einfo ("%P%F: -r and -call_shared may not be used together\n");
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if (link_info.shared)
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einfo ("%P%F: -r and -shared may not be used together\n");
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}
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/* Treat ld -r -s as ld -r -S -x (i.e., strip all local symbols). I
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don't see how else this can be handled, since in this case we
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must preserve all externally visible symbols. */
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if (link_info.relocateable && link_info.strip == strip_all)
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{
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link_info.strip = strip_debugger;
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if (link_info.discard == discard_none)
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link_info.discard = discard_all;
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}
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/* This essentially adds another -L directory so this must be done after
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the -L's in argv have been processed. */
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set_scripts_dir ();
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if (had_script == false)
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{
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/* Read the emulation's appropriate default script. */
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int isfile;
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char *s = ldemul_get_script (&isfile);
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if (isfile)
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ldfile_open_command_file (s);
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else
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lex_redirect (s);
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parser_input = input_script;
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yyparse ();
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}
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lang_final ();
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if (lang_has_input_file == false)
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{
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if (version_printed)
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xexit (0);
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einfo ("%P%F: no input files\n");
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}
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if (trace_files)
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{
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info_msg ("%P: mode %s\n", emulation);
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}
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ldemul_after_parse ();
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if (config.map_filename)
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{
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if (strcmp (config.map_filename, "-") == 0)
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{
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config.map_file = stdout;
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}
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else
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{
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config.map_file = fopen (config.map_filename, FOPEN_WT);
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if (config.map_file == (FILE *) NULL)
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{
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einfo ("%P%F: cannot open map file %s: %E\n",
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config.map_filename);
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}
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}
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}
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lang_process ();
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/* Print error messages for any missing symbols, for any warning
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symbols, and possibly multiple definitions */
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if (config.text_read_only)
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{
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/* Look for a text section and mark the readonly attribute in it */
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asection *found = bfd_get_section_by_name (output_bfd, ".text");
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if (found != (asection *) NULL)
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{
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found->flags |= SEC_READONLY;
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}
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}
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||
if (link_info.relocateable)
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output_bfd->flags &= ~EXEC_P;
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else
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output_bfd->flags |= EXEC_P;
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||
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ldwrite ();
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/* Even if we're producing relocateable output, some non-fatal errors should
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be reported in the exit status. (What non-fatal errors, if any, do we
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want to ignore for relocateable output?) */
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||
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||
if (config.make_executable == false && force_make_executable == false)
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{
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||
if (trace_files == true)
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{
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||
einfo ("%P: link errors found, deleting executable `%s'\n",
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output_filename);
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||
}
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||
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if (output_bfd->iostream)
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fclose ((FILE *) (output_bfd->iostream));
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unlink (output_filename);
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xexit (1);
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||
}
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else
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{
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if (! bfd_close (output_bfd))
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einfo ("%F%B: final close failed: %E\n", output_bfd);
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}
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if (config.stats)
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{
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extern char **environ;
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char *lim = (char *) sbrk (0);
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long run_time = get_run_time () - start_time;
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||
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fprintf (stderr, "%s: total time in link: %ld.%06ld\n",
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program_name, run_time / 1000000, run_time % 1000000);
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fprintf (stderr, "%s: data size %ld\n", program_name,
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(long) (lim - (char *) &environ));
|
||
}
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||
|
||
/* Prevent remove_output from doing anything, after a successful link. */
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output_filename = NULL;
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||
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||
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 *
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get_emulation (argc, argv)
|
||
int argc;
|
||
char **argv;
|
||
{
|
||
char *emulation;
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int i;
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||
|
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emulation = (char *) getenv (EMULATION_ENVIRON);
|
||
if (emulation == NULL)
|
||
emulation = DEFAULT_EMULATION;
|
||
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for (i = 1; i < argc; i++)
|
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{
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if (!strncmp (argv[i], "-m", 2))
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{
|
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if (argv[i][2] == '\0')
|
||
{
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||
/* -m EMUL */
|
||
if (i < argc - 1)
|
||
{
|
||
emulation = argv[i + 1];
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||
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)
|
||
{
|
||
/* 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)
|
||
{
|
||
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';
|
||
}
|
||
else
|
||
{
|
||
dirlen = 1;
|
||
dir = (char *) xmalloc (dirlen + 8);
|
||
strcpy (dir, ".");
|
||
}
|
||
|
||
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");
|
||
}
|
||
|
||
/* 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", 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");
|
||
}
|
||
}
|
||
|
||
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 ((bfd_size_type) 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, common_section,
|
||
common_output_section, complained. 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)
|
||
minfo ("%s needed due to %T\n", abfd->filename, 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;
|
||
{
|
||
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.build_constructors)
|
||
return true;
|
||
|
||
ldctor_add_set_entry (h, reloc, 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 *set_name;
|
||
char *s;
|
||
struct bfd_link_hash_entry *h;
|
||
|
||
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)
|
||
einfo ("%P%F: BFD backend error: BFD_RELOC_CTOR unsupported");
|
||
|
||
set_name = (char *) alloca (1 + sizeof "__CTOR_LIST__");
|
||
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__");
|
||
|
||
if (config.map_file != (FILE *) NULL)
|
||
fprintf (config.map_file,
|
||
"Adding %s to constructor/destructor set %s\n", name, set_name);
|
||
|
||
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");
|
||
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, section, value);
|
||
return true;
|
||
}
|
||
|
||
/* This is called when there is a reference to a warning symbol. */
|
||
|
||
/*ARGSUSED*/
|
||
static boolean
|
||
warning_callback (info, warning)
|
||
struct bfd_link_info *info;
|
||
const char *warning;
|
||
{
|
||
einfo ("%P: %s\n", warning);
|
||
return true;
|
||
}
|
||
|
||
/* 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 when a symbol in notice_hash is found. Symbols are
|
||
put in notice_hash using the -y option. */
|
||
|
||
/*ARGSUSED*/
|
||
static boolean
|
||
notice_ysym (info, name, abfd, section, value)
|
||
struct bfd_link_info *info;
|
||
const char *name;
|
||
bfd *abfd;
|
||
asection *section;
|
||
bfd_vma value;
|
||
{
|
||
einfo ("%B: %s %s\n", abfd,
|
||
bfd_is_und_section (section) ? "reference to" : "definition of",
|
||
name);
|
||
return true;
|
||
}
|