X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=ld%2Fldmain.c;h=29ef77f4f02f43e4c167c2e4794d1e60d81394d2;hb=80169c8a23d9bd3f213028e3d44239b03d0aedf7;hp=88811904aed960333371c36f13fae9b798a65001;hpb=24718e3ba575439155f233fc593a9ebd6d33f3c5;p=deliverable%2Fbinutils-gdb.git diff --git a/ld/ldmain.c b/ld/ldmain.c index 88811904ae..29ef77f4f0 100644 --- a/ld/ldmain.c +++ b/ld/ldmain.c @@ -1,29 +1,26 @@ /* Main program of GNU linker. - Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, - 2002, 2003, 2004, 2005, 2006 - Free Software Foundation, Inc. + Copyright (C) 1991-2016 Free Software Foundation, Inc. Written by Steve Chamberlain steve@cygnus.com - This file is part of GLD, the Gnu Linker. + This file is part of the GNU Binutils. - GLD is free software; you can redistribute it and/or modify + This program 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. + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. - GLD is distributed in the hope that it will be useful, + This program 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, 51 Franklin Street - Fifth Floor, Boston, MA - 02110-1301, USA. */ + along with this program; if not, write to the Free Software + Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, + MA 02110-1301, USA. */ -#include "bfd.h" #include "sysdep.h" -#include +#include "bfd.h" #include "safe-ctype.h" #include "libiberty.h" #include "progress.h" @@ -41,6 +38,10 @@ #include "ldfile.h" #include "ldemul.h" #include "ldctor.h" +#ifdef ENABLE_PLUGINS +#include "plugin.h" +#include "plugin-api.h" +#endif /* ENABLE_PLUGINS */ /* Somewhere above, sys/stat.h got included. */ #if !defined(S_ISDIR) && defined(S_IFDIR) @@ -61,6 +62,10 @@ extern void *sbrk (); /* EXPORTS */ +FILE *saved_script_handle = NULL; +FILE *previous_script_handle = NULL; +bfd_boolean force_make_executable = FALSE; + char *default_target; const char *output_filename = "a.out"; @@ -71,36 +76,22 @@ char *program_name; const char *ld_sysroot; /* The canonical representation of ld_sysroot. */ -char * ld_canon_sysroot; +char *ld_canon_sysroot; int ld_canon_sysroot_len; -/* The file that we're creating. */ -bfd *output_bfd = 0; - -/* Set by -G argument, for MIPS ECOFF target. */ +/* Set by -G argument, for targets like MIPS ELF. */ int g_switch_value = 8; /* Nonzero means print names of input files as processed. */ bfd_boolean trace_files; -/* Nonzero means same, but note open failures, too. */ -bfd_boolean trace_file_tries; +/* Nonzero means report actions taken by the linker, and describe the linker script in use. */ +bfd_boolean verbose; /* Nonzero means version number was printed, so exit successfully instead of complaining if no input files are given. */ bfd_boolean version_printed; -/* Nonzero means link in every member of an archive. */ -bfd_boolean whole_archive; - -/* Nonzero means create DT_NEEDED entries only if a dynamic library - actually satisfies some reference in a regular object. */ -bfd_boolean as_needed; - -/* Nonzero means never create DT_NEEDED entries for dynamic libraries - in DT_NEEDED tags. */ -bfd_boolean add_needed = TRUE; - /* TRUE if we should demangle symbol names. */ bfd_boolean demangling; @@ -114,39 +105,38 @@ static const char *get_sysroot (int, char **); static char *get_emulation (int, char **); -static void set_scripts_dir - (void); static bfd_boolean add_archive_element - (struct bfd_link_info *, bfd *, const char *); -static bfd_boolean multiple_definition - (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma, + (struct bfd_link_info *, bfd *, const char *, bfd **); +static void multiple_definition + (struct bfd_link_info *, struct bfd_link_hash_entry *, bfd *, asection *, bfd_vma); -static bfd_boolean multiple_common - (struct bfd_link_info *, const char *, bfd *, enum bfd_link_hash_type, - bfd_vma, bfd *, enum bfd_link_hash_type, bfd_vma); -static bfd_boolean add_to_set +static void multiple_common + (struct bfd_link_info *, struct bfd_link_hash_entry *, + bfd *, enum bfd_link_hash_type, bfd_vma); +static void add_to_set (struct bfd_link_info *, struct bfd_link_hash_entry *, bfd_reloc_code_real_type, bfd *, asection *, bfd_vma); -static bfd_boolean constructor_callback +static void constructor_callback (struct bfd_link_info *, bfd_boolean, const char *, bfd *, asection *, bfd_vma); -static bfd_boolean warning_callback +static void warning_callback (struct bfd_link_info *, const char *, const char *, bfd *, asection *, bfd_vma); static void warning_find_reloc (bfd *, asection *, void *); -static bfd_boolean undefined_symbol +static void undefined_symbol (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma, bfd_boolean); -static bfd_boolean reloc_overflow +static void reloc_overflow (struct bfd_link_info *, struct bfd_link_hash_entry *, const char *, const char *, bfd_vma, bfd *, asection *, bfd_vma); -static bfd_boolean reloc_dangerous +static void reloc_dangerous (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma); -static bfd_boolean unattached_reloc +static void unattached_reloc (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma); static bfd_boolean notice - (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma); + (struct bfd_link_info *, struct bfd_link_hash_entry *, + struct bfd_link_hash_entry *, bfd *, asection *, bfd_vma, flagword); static struct bfd_link_callbacks link_callbacks = { @@ -161,21 +151,46 @@ static struct bfd_link_callbacks link_callbacks = reloc_dangerous, unattached_reloc, notice, - einfo + einfo, + info_msg, + minfo, + ldlang_override_segment_assignment }; +static bfd_assert_handler_type default_bfd_assert_handler; +static bfd_error_handler_type default_bfd_error_handler; + struct bfd_link_info link_info; static void -remove_output (void) +ld_cleanup (void) { - if (output_filename) - { - if (output_bfd) - bfd_cache_close (output_bfd); - if (delete_output_file_on_failure) - unlink_if_ordinary (output_filename); - } + bfd_cache_close_all (); +#ifdef ENABLE_PLUGINS + plugin_call_cleanup (); +#endif + if (output_filename && delete_output_file_on_failure) + unlink_if_ordinary (output_filename); +} + +/* Hook to notice BFD assertions. */ + +static void +ld_bfd_assert_handler (const char *fmt, const char *bfdver, + const char *file, int line) +{ + config.make_executable = FALSE; + (*default_bfd_assert_handler) (fmt, bfdver, file, line); +} + +/* Hook the bfd error/warning handler for --fatal-warnings. */ + +static void +ld_bfd_error_handler (const char *fmt, va_list ap) +{ + if (config.fatal_warnings) + config.make_executable = FALSE; + (*default_bfd_error_handler) (fmt, ap); } int @@ -183,6 +198,9 @@ main (int argc, char **argv) { char *emulation; long start_time = get_run_time (); +#ifdef HAVE_SBRK + char *start_sbrk = (char *) sbrk (0); +#endif #if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES) setlocale (LC_MESSAGES, ""); @@ -204,20 +222,20 @@ main (int argc, char **argv) bfd_set_error_program_name (program_name); - xatexit (remove_output); + /* We want to notice and fail on those nasty BFD assertions which are + likely to signal incorrect output being generated but otherwise may + leave no trace. */ + default_bfd_assert_handler = bfd_set_assert_handler (ld_bfd_assert_handler); + + /* Also hook the bfd error/warning handler for --fatal-warnings. */ + default_bfd_error_handler = bfd_set_error_handler (ld_bfd_error_handler); + + xatexit (ld_cleanup); /* Set up the sysroot directory. */ ld_sysroot = get_sysroot (argc, argv); if (*ld_sysroot) - { - if (*TARGET_SYSTEM_ROOT == 0) - { - einfo ("%P%F: this linker was not configured to use sysroots\n"); - ld_sysroot = ""; - } - else - ld_canon_sysroot = lrealpath (ld_sysroot); - } + ld_canon_sysroot = lrealpath (ld_sysroot); if (ld_canon_sysroot) ld_canon_sysroot_len = strlen (ld_canon_sysroot); else @@ -227,7 +245,7 @@ main (int argc, char **argv) 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)) + if (!bfd_set_default_target (TARGET)) { einfo (_("%X%P: can't set BFD default target to `%s': %E\n"), TARGET); xexit (1); @@ -240,25 +258,18 @@ main (int argc, char **argv) } #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.rpath_separator = ':'; config.split_by_reloc = (unsigned) -1; config.split_by_file = (bfd_size_type) -1; - config.hash_table_size = 0; - 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; - command_line.accept_unknown_input_arch = FALSE; - command_line.reduce_memory_overheads = FALSE; + config.make_executable = TRUE; + config.magic_demand_paged = TRUE; + config.text_read_only = TRUE; + link_info.disable_target_specific_optimizations = -1; - sort_section = none; + command_line.warn_mismatch = TRUE; + command_line.warn_search_mismatch = TRUE; + command_line.check_section_addresses = -1; /* We initialize DEMANGLING based on the environment variable COLLECT_NO_DEMANGLE. The gcc collect2 program will demangle the @@ -267,70 +278,35 @@ main (int argc, char **argv) interface by default. */ demangling = getenv ("COLLECT_NO_DEMANGLE") == NULL; - link_info.relocatable = FALSE; - link_info.emitrelocations = FALSE; - link_info.task_link = FALSE; - link_info.shared = FALSE; - link_info.pie = FALSE; - link_info.executable = 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.unresolved_syms_in_objects = RM_NOT_YET_SET; - link_info.unresolved_syms_in_shared_libs = RM_NOT_YET_SET; - link_info.allow_multiple_definition = FALSE; link_info.allow_undefined_version = TRUE; - link_info.create_default_symver = FALSE; - link_info.default_imported_symver = FALSE; link_info.keep_memory = TRUE; - link_info.notice_all = FALSE; - link_info.nocopyreloc = FALSE; - link_info.new_dtags = FALSE; link_info.combreloc = TRUE; - link_info.eh_frame_hdr = FALSE; - link_info.relro = FALSE; link_info.strip_discarded = TRUE; - link_info.strip = strip_none; - link_info.discard = discard_sec_merge; - link_info.common_skip_ar_aymbols = bfd_link_common_skip_none; + link_info.emit_hash = TRUE; link_info.callbacks = &link_callbacks; - link_info.hash = NULL; - link_info.keep_hash = NULL; - link_info.notice_hash = NULL; - link_info.wrap_hash = NULL; - link_info.input_bfds = NULL; - link_info.create_object_symbols_section = NULL; - link_info.gc_sym_list = NULL; - link_info.base_file = NULL; + link_info.input_bfds_tail = &link_info.input_bfds; /* 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.relax_pass = 1; + link_info.extern_protected_data = -1; + link_info.dynamic_undefined_weak = -1; link_info.pei386_auto_import = -1; - link_info.pei386_runtime_pseudo_reloc = FALSE; link_info.spare_dynamic_tags = 5; - link_info.flags = 0; - link_info.flags_1 = 0; - link_info.relax_pass = 1; - link_info.warn_shared_textrel = FALSE; - link_info.gc_sections = FALSE; - - config.maxpagesize = 0; - config.commonpagesize = 0; + link_info.path_separator = ':'; +#ifdef DEFAULT_FLAG_COMPRESS_DEBUG + link_info.compress_debug = COMPRESS_DEBUG_GABI_ZLIB; +#endif 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); + config.maxpagesize = bfd_emul_get_maxpagesize (default_target); + config.commonpagesize = bfd_emul_get_commonpagesize (default_target); lang_init (); + ldexp_init (); ldemul_before_parse (); lang_has_input_file = FALSE; parse_args (argc, argv); @@ -338,50 +314,23 @@ main (int argc, char **argv) if (config.hash_table_size != 0) bfd_hash_set_default_size (config.hash_table_size); - if (config.maxpagesize != 0) - bfd_emul_set_maxpagesize (default_target, config.maxpagesize); - - if (config.commonpagesize != 0) - bfd_emul_set_commonpagesize (default_target, - config.commonpagesize); +#ifdef ENABLE_PLUGINS + /* Now all the plugin arguments have been gathered, we can load them. */ + plugin_load_plugins (); +#endif /* ENABLE_PLUGINS */ ldemul_set_symbols (); - if (link_info.relocatable) - { - if (link_info.gc_sections) - einfo ("%P%F: --gc-sections and -r 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 we have not already opened and parsed a linker script, + try the default script from command line first. */ + if (saved_script_handle == NULL + && command_line.default_script != NULL) { - 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")); - } - - if (! link_info.shared || link_info.pie) - link_info.executable = TRUE; - - /* 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.relocatable && link_info.strip == strip_all) - { - link_info.strip = strip_debugger; - if (link_info.discard == discard_sec_merge) - link_info.discard = discard_all; + ldfile_open_command_file (command_line.default_script); + parser_input = input_script; + yyparse (); } - /* 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) @@ -390,18 +339,18 @@ main (int argc, char **argv) char *s = ldemul_get_script (&isfile); if (isfile) - ldfile_open_command_file (s); + ldfile_open_default_command_file (s); else { lex_string = s; - lex_redirect (s); + lex_redirect (s, _("built in linker script"), 1); } parser_input = input_script; yyparse (); lex_string = NULL; } - if (trace_file_tries) + if (verbose) { if (saved_script_handle) info_msg (_("using external linker script:")); @@ -413,7 +362,7 @@ main (int argc, char **argv) { static const int ld_bufsz = 8193; size_t n; - char *buf = xmalloc (ld_bufsz); + char *buf = (char *) xmalloc (ld_bufsz); rewind (saved_script_handle); while ((n = fread (buf, 1, ld_bufsz - 1, saved_script_handle)) > 0) @@ -434,11 +383,21 @@ main (int argc, char **argv) info_msg ("\n==================================================\n"); } + if (command_line.print_output_format) + info_msg ("%s\n", lang_get_output_target ()); + lang_final (); + /* If the only command line argument has been -v or --version or --verbose + then ignore any input files provided by linker scripts and exit now. + We do not want to create an output file when the linker is just invoked + to provide version information. */ + if (argc == 2 && version_printed) + xexit (0); + if (!lang_has_input_file) { - if (version_printed) + if (version_printed || command_line.print_output_format) xexit (0); einfo (_("%P%F: no input files\n")); } @@ -470,10 +429,17 @@ main (int argc, char **argv) /* Print error messages for any missing symbols, for any warning symbols, and possibly multiple definitions. */ - if (link_info.relocatable) - output_bfd->flags &= ~EXEC_P; + if (bfd_link_relocatable (&link_info)) + link_info.output_bfd->flags &= ~EXEC_P; else - output_bfd->flags |= EXEC_P; + link_info.output_bfd->flags |= EXEC_P; + + if ((link_info.compress_debug & COMPRESS_DEBUG)) + { + link_info.output_bfd->flags |= BFD_COMPRESS; + if (link_info.compress_debug == COMPRESS_DEBUG_GABI_ZLIB) + link_info.output_bfd->flags |= BFD_COMPRESS_GABI; + } ldwrite (); @@ -483,7 +449,17 @@ main (int argc, char **argv) output_cref (config.map_file != NULL ? config.map_file : stdout); if (nocrossref_list != NULL) check_nocrossrefs (); + if (command_line.print_memory_usage) + lang_print_memory_usage (); +#if 0 + { + struct bfd_link_hash_entry *h; + h = bfd_link_hash_lookup (link_info.hash, "__image_base__", 0,0,1); + fprintf (stderr, "lookup = %p val %lx\n", h, h ? h->u.def.value : 1); + } +#endif + ldexp_finish (); lang_finish (); /* Even if we're producing relocatable output, some non-fatal errors should @@ -495,18 +471,19 @@ main (int argc, char **argv) einfo (_("%P: link errors found, deleting executable `%s'\n"), output_filename); - /* The file will be removed by remove_output. */ + /* The file will be removed by ld_cleanup. */ xexit (1); } else { - if (! bfd_close (output_bfd)) - einfo (_("%F%B: final close failed: %E\n"), output_bfd); + if (!bfd_close (link_info.output_bfd)) + einfo (_("%F%B: final close failed: %E\n"), link_info.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.relocatable && command_line.force_exe_suffix) + if (!bfd_link_relocatable (&link_info) + && command_line.force_exe_suffix) { int len = strlen (output_filename); @@ -517,9 +494,9 @@ main (int argc, char **argv) FILE *src; FILE *dst; const int bsize = 4096; - char *buf = xmalloc (bsize); + char *buf = (char *) xmalloc (bsize); int l; - char *dst_name = xmalloc (len + 5); + char *dst_name = (char *) xmalloc (len + 5); strcpy (dst_name, output_filename); strcat (dst_name, ".exe"); @@ -527,10 +504,10 @@ main (int argc, char **argv) dst = fopen (dst_name, FOPEN_WB); if (!src) - einfo (_("%X%P: unable to open for source of copy `%s'\n"), + einfo (_("%P%F: 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"), + einfo (_("%P%F: unable to open for destination of copy `%s'\n"), dst_name); while ((l = fread (buf, 1, bsize, src)) > 0) { @@ -554,19 +531,21 @@ main (int argc, char **argv) if (config.stats) { #ifdef HAVE_SBRK - char *lim = sbrk (0); + char *lim = (char *) sbrk (0); #endif long run_time = get_run_time () - start_time; + fflush (stdout); 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)); + (long) (lim - start_sbrk)); #endif + fflush (stderr); } - /* Prevent remove_output from doing anything, after a successful link. */ + /* Prevent ld_cleanup from doing anything, after a successful link. */ output_filename = NULL; xexit (0); @@ -604,7 +583,7 @@ get_sysroot (int argc, char **argv) const char *path; for (i = 1; i < argc; i++) - if (strncmp (argv[i], "--sysroot=", strlen ("--sysroot=")) == 0) + if (CONST_STRNEQ (argv[i], "--sysroot=")) return argv[i] + strlen ("--sysroot="); path = get_relative_sysroot (BINDIR); @@ -633,7 +612,7 @@ get_emulation (int argc, char **argv) for (i = 1; i < argc; i++) { - if (!strncmp (argv[i], "-m", 2)) + if (CONST_STRNEQ (argv[i], "-m")) { if (argv[i][2] == '\0') { @@ -653,8 +632,10 @@ get_emulation (int argc, char **argv) || strcmp (argv[i], "-mips5") == 0 || strcmp (argv[i], "-mips32") == 0 || strcmp (argv[i], "-mips32r2") == 0 + || strcmp (argv[i], "-mips32r6") == 0 || strcmp (argv[i], "-mips64") == 0 - || strcmp (argv[i], "-mips64r2") == 0) + || strcmp (argv[i], "-mips64r2") == 0 + || strcmp (argv[i], "-mips64r6") == 0) { /* FIXME: The arguments -mips1, -mips2, -mips3, etc. are passed to the linker by some MIPS compilers. They @@ -681,120 +662,38 @@ get_emulation (int argc, char **argv) return emulation; } -/* If directory DIR contains an "ldscripts" subdirectory, - add DIR to the library search path and return TRUE, - else return FALSE. */ - -static bfd_boolean -check_for_scripts_dir (char *dir) -{ - size_t dirlen; - char *buf; - struct stat s; - bfd_boolean res; - - dirlen = strlen (dir); - /* sizeof counts the terminating NUL. */ - buf = 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) - (adjusted according to the current location of the binary) - 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 (void) +void +add_ysym (const char *name) { - char *end, *dir; - size_t dirlen; - bfd_boolean found; - - dir = make_relative_prefix (program_name, BINDIR, SCRIPTDIR); - if (dir) - { - found = check_for_scripts_dir (dir); - free (dir); - if (found) - return; - } - - dir = make_relative_prefix (program_name, TOOLBINDIR, SCRIPTDIR); - if (dir) - { - found = check_for_scripts_dir (dir); - free (dir); - if (found) - return; - } - - 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 = xmalloc (dirlen + 8); - strncpy (dir, program_name, dirlen); - dir[dirlen] = '\0'; - - if (check_for_scripts_dir (dir)) + if (link_info.notice_hash == NULL) { - free (dir); - return; + 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, + sizeof (struct bfd_hash_entry), + 61)) + einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); } - /* Look for "ldscripts" in /../lib. */ - strcpy (dir + dirlen, "/../lib"); - check_for_scripts_dir (dir); - free (dir); + if (bfd_hash_lookup (link_info.notice_hash, name, TRUE, TRUE) == NULL) + einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); } void -add_ysym (const char *name) +add_ignoresym (struct bfd_link_info *info, const char *name) { - if (link_info.notice_hash == NULL) + if (info->ignore_hash == NULL) { - link_info.notice_hash = xmalloc (sizeof (struct bfd_hash_table)); - if (!bfd_hash_table_init_n (link_info.notice_hash, + info->ignore_hash = xmalloc (sizeof (struct bfd_hash_table)); + if (!bfd_hash_table_init_n (info->ignore_hash, bfd_hash_newfunc, sizeof (struct bfd_hash_entry), 61)) einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); } - if (bfd_hash_lookup (link_info.notice_hash, name, TRUE, TRUE) == NULL) + if (bfd_hash_lookup (info->ignore_hash, name, TRUE, TRUE) == NULL) einfo (_("%P%F: bfd_hash_lookup failed: %E\n")); } @@ -805,7 +704,8 @@ add_wrap (const char *name) { if (link_info.wrap_hash == NULL) { - link_info.wrap_hash = xmalloc (sizeof (struct bfd_hash_table)); + 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, sizeof (struct bfd_hash_entry), @@ -838,13 +738,14 @@ add_keepsyms_file (const char *filename) return; } - link_info.keep_hash = xmalloc (sizeof (struct bfd_hash_table)); + 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, sizeof (struct bfd_hash_entry))) einfo (_("%P%F: bfd_hash_table_init failed: %E\n")); bufsize = 100; - buf = xmalloc (bufsize); + buf = (char *) xmalloc (bufsize); c = getc (file); while (c != EOF) @@ -856,14 +757,14 @@ add_keepsyms_file (const char *filename) { size_t len = 0; - while (! ISSPACE (c) && c != EOF) + while (!ISSPACE (c) && c != EOF) { buf[len] = c; ++len; if (len >= bufsize) { bufsize *= 2; - buf = xrealloc (buf, bufsize); + buf = (char *) xrealloc (buf, bufsize); } c = getc (file); } @@ -880,6 +781,7 @@ add_keepsyms_file (const char *filename) free (buf); link_info.strip = strip_some; + fclose (file); } /* Callbacks from the BFD linker routines. */ @@ -890,25 +792,44 @@ add_keepsyms_file (const char *filename) static bfd_boolean add_archive_element (struct bfd_link_info *info, bfd *abfd, - const char *name) + const char *name, + bfd **subsbfd ATTRIBUTE_UNUSED) { lang_input_statement_type *input; + lang_input_statement_type orig_input; - input = xmalloc (sizeof (lang_input_statement_type)); + input = (lang_input_statement_type *) + xcalloc (1, 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. */ + + /* Save the original data for trace files/tries below, as plugins + (if enabled) may possibly alter it to point to a replacement + BFD, but we still want to output the original BFD filename. */ + orig_input = *input; +#ifdef ENABLE_PLUGINS + if (link_info.lto_plugin_active) + { + /* We must offer this archive member to the plugins to claim. */ + plugin_maybe_claim (input); + if (input->flags.claimed) + { + if (no_more_claiming) + { + /* Don't claim new IR symbols after all IR symbols have + been claimed. */ + if (trace_files || verbose) + info_msg ("%I: no new IR symbols to claimi\n", + &orig_input); + input->flags.claimed = 0; + return FALSE; + } + input->flags.claim_archive = TRUE; + *subsbfd = input->the_bfd; + } + } +#endif /* ENABLE_PLUGINS */ ldlang_add_file (input); @@ -947,25 +868,27 @@ add_archive_element (struct bfd_link_info *info, } } - if (! header_printed) + if (!header_printed) { char buf[100]; - sprintf (buf, _("Archive member included because of file (symbol)\n\n")); + sprintf (buf, _("Archive member included " + "to satisfy reference by file (symbol)\n\n")); minfo ("%s", buf); header_printed = TRUE; } - if (bfd_my_archive (abfd) == NULL) + if (abfd->my_archive == NULL + || bfd_is_thin_archive (abfd->my_archive)) { minfo ("%s", bfd_get_filename (abfd)); len = strlen (bfd_get_filename (abfd)); } else { - minfo ("%s(%s)", bfd_get_filename (bfd_my_archive (abfd)), + minfo ("%s(%s)", bfd_get_filename (abfd->my_archive), bfd_get_filename (abfd)); - len = (strlen (bfd_get_filename (bfd_my_archive (abfd))) + len = (strlen (bfd_get_filename (abfd->my_archive)) + strlen (bfd_get_filename (abfd)) + 2); } @@ -989,50 +912,84 @@ add_archive_element (struct bfd_link_info *info, minfo ("(%s)\n", name); } - if (trace_files || trace_file_tries) - info_msg ("%I\n", input); - + if (trace_files || verbose) + info_msg ("%I\n", &orig_input); return TRUE; } /* This is called when BFD has discovered a symbol which is defined multiple times. */ -static bfd_boolean -multiple_definition (struct bfd_link_info *info ATTRIBUTE_UNUSED, - const char *name, - bfd *obfd, - asection *osec, - bfd_vma oval, +static void +multiple_definition (struct bfd_link_info *info, + struct bfd_link_hash_entry *h, bfd *nbfd, asection *nsec, bfd_vma nval) { + const char *name; + bfd *obfd; + asection *osec; + bfd_vma oval; + + if (info->allow_multiple_definition) + return; + + switch (h->type) + { + case bfd_link_hash_defined: + osec = h->u.def.section; + oval = h->u.def.value; + obfd = h->u.def.section->owner; + break; + case bfd_link_hash_indirect: + osec = bfd_ind_section_ptr; + oval = 0; + obfd = NULL; + break; + default: + abort (); + } + + /* Ignore a redefinition of an absolute symbol to the + same value; it's harmless. */ + if (h->type == bfd_link_hash_defined + && bfd_is_abs_section (osec) + && bfd_is_abs_section (nsec) + && nval == oval) + return; + /* 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) && bfd_is_abs_section (osec->output_section)) || (nsec->output_section != NULL - && ! bfd_is_abs_section (nsec) + && !bfd_is_abs_section (nsec) && bfd_is_abs_section (nsec->output_section))) - return TRUE; + return; + name = h->root.string; + if (nbfd == NULL) + { + nbfd = obfd; + nsec = osec; + nval = oval; + obfd = NULL; + } einfo (_("%X%C: multiple definition of `%T'\n"), nbfd, nsec, nval, name); if (obfd != NULL) einfo (_("%D: first defined here\n"), obfd, osec, oval); - if (command_line.relax) + if (RELAXATION_ENABLED_BY_USER) { einfo (_("%P: Disabling relaxation: it will not work with multiple definitions\n")); - command_line.relax = 0; + DISABLE_RELAXATION; } - - return TRUE; } /* This is called when there is a definition of a common symbol, or @@ -1040,18 +997,42 @@ multiple_definition (struct bfd_link_info *info ATTRIBUTE_UNUSED, or when two common symbols are found. We only do something if -warn-common was used. */ -static bfd_boolean +static void multiple_common (struct bfd_link_info *info ATTRIBUTE_UNUSED, - const char *name, - bfd *obfd, - enum bfd_link_hash_type otype, - bfd_vma osize, + struct bfd_link_hash_entry *h, bfd *nbfd, enum bfd_link_hash_type ntype, bfd_vma nsize) { - if (! config.warn_common) - return TRUE; + const char *name; + bfd *obfd; + enum bfd_link_hash_type otype; + bfd_vma osize; + + if (!config.warn_common) + return; + + name = h->root.string; + otype = h->type; + if (otype == bfd_link_hash_common) + { + obfd = h->u.c.p->section->owner; + osize = h->u.c.size; + } + else if (otype == bfd_link_hash_defined + || otype == bfd_link_hash_defweak) + { + obfd = h->u.def.section->owner; + osize = 0; + } + else + { + /* FIXME: It would nice if we could report the BFD which defined + an indirect symbol, but we don't have anywhere to store the + information. */ + obfd = NULL; + osize = 0; + } if (ntype == bfd_link_hash_defined || ntype == bfd_link_hash_defweak @@ -1097,15 +1078,13 @@ multiple_common (struct bfd_link_info *info ATTRIBUTE_UNUSED, 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 bfd_boolean +static void add_to_set (struct bfd_link_info *info ATTRIBUTE_UNUSED, struct bfd_link_hash_entry *h, bfd_reloc_code_real_type reloc, @@ -1117,8 +1096,8 @@ add_to_set (struct bfd_link_info *info ATTRIBUTE_UNUSED, einfo (_("%P: warning: global constructor %s used\n"), h->root.string); - if (! config.build_constructors) - return TRUE; + if (!config.build_constructors) + return; ldctor_add_set_entry (h, reloc, NULL, section, value); @@ -1130,8 +1109,6 @@ add_to_set (struct bfd_link_info *info ATTRIBUTE_UNUSED, undefined symbols because we are going to define it ourselves. */ } - - return TRUE; } /* This is called when BFD has discovered a constructor. This is only @@ -1139,7 +1116,7 @@ add_to_set (struct bfd_link_info *info ATTRIBUTE_UNUSED, constructors in some more clever fashion. This is similar to adding an element to a set, but less general. */ -static bfd_boolean +static void constructor_callback (struct bfd_link_info *info, bfd_boolean constructor, const char *name, @@ -1154,13 +1131,13 @@ constructor_callback (struct bfd_link_info *info, if (config.warn_constructors) einfo (_("%P: warning: global constructor %s used\n"), name); - if (! config.build_constructors) - return TRUE; + if (!config.build_constructors) + return; /* 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 - && (info->relocatable + if (bfd_reloc_type_lookup (info->output_bfd, BFD_RELOC_CTOR) == NULL + && (bfd_link_relocatable (info) || bfd_reloc_type_lookup (abfd, BFD_RELOC_CTOR) == NULL)) einfo (_("%P%F: BFD backend error: BFD_RELOC_CTOR unsupported\n")); @@ -1185,7 +1162,6 @@ constructor_callback (struct bfd_link_info *info, } ldctor_add_set_entry (h, BFD_RELOC_CTOR, name, section, value); - return TRUE; } /* A structure used by warning_callback to pass information through @@ -1199,9 +1175,28 @@ struct warning_callback_info asymbol **asymbols; }; -/* This is called when there is a reference to a warning symbol. */ +/* Look through the relocs to see if we can find a plausible address + for SYMBOL in ABFD. Return TRUE if found. Otherwise return FALSE. */ static bfd_boolean +symbol_warning (const char *warning, const char *symbol, bfd *abfd) +{ + struct warning_callback_info cinfo; + + if (!bfd_generic_link_read_symbols (abfd)) + einfo (_("%B%F: could not read symbols: %E\n"), abfd); + + cinfo.found = FALSE; + cinfo.warning = warning; + cinfo.symbol = symbol; + cinfo.asymbols = bfd_get_outsymbols (abfd); + bfd_map_over_sections (abfd, warning_find_reloc, &cinfo); + return cinfo.found; +} + +/* This is called when there is a reference to a warning symbol. */ + +static void warning_callback (struct bfd_link_info *info ATTRIBUTE_UNUSED, const char *warning, const char *symbol, @@ -1211,9 +1206,9 @@ warning_callback (struct bfd_link_info *info ATTRIBUTE_UNUSED, { /* This is a hack to support warn_multiple_gp. FIXME: This should have a cleaner interface, but what? */ - if (! config.warn_multiple_gp + if (!config.warn_multiple_gp && strcmp (warning, "using multiple gp values") == 0) - return TRUE; + return; if (section != NULL) einfo ("%C: %s%s\n", abfd, section, address, _("warning: "), warning); @@ -1221,50 +1216,15 @@ warning_callback (struct bfd_link_info *info ATTRIBUTE_UNUSED, einfo ("%P: %s%s\n", _("warning: "), warning); else if (symbol == NULL) einfo ("%B: %s%s\n", abfd, _("warning: "), warning); - else + else if (!symbol_warning (warning, symbol, abfd)) { - 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 = 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, &info); - - if (! info.found) - einfo ("%B: %s%s\n", abfd, _("warning: "), warning); - - if (entry == NULL) - free (asymbols); + bfd *b; + /* Search all input files for a reference to SYMBOL. */ + for (b = info->input_bfds; b; b = b->link.next) + if (b != abfd && symbol_warning (warning, symbol, b)) + return; + einfo ("%B: %s%s\n", abfd, _("warning: "), warning); } - - return TRUE; } /* This is called by warning_callback for each section. It checks the @@ -1275,7 +1235,7 @@ warning_callback (struct bfd_link_info *info ATTRIBUTE_UNUSED, static void warning_find_reloc (bfd *abfd, asection *sec, void *iarg) { - struct warning_callback_info *info = iarg; + struct warning_callback_info *info = (struct warning_callback_info *) iarg; long relsize; arelent **relpp; long relcount; @@ -1290,7 +1250,7 @@ warning_find_reloc (bfd *abfd, asection *sec, void *iarg) if (relsize == 0) return; - relpp = xmalloc (relsize); + 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); @@ -1318,8 +1278,8 @@ warning_find_reloc (bfd *abfd, asection *sec, void *iarg) /* This is called when an undefined symbol is found. */ -static bfd_boolean -undefined_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED, +static void +undefined_symbol (struct bfd_link_info *info, const char *name, bfd *abfd, asection *section, @@ -1331,24 +1291,14 @@ undefined_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED, #define MAX_ERRORS_IN_A_ROW 5 + if (info->ignore_hash != NULL + && bfd_hash_lookup (info->ignore_hash, name, FALSE, FALSE) != NULL) + return; + if (config.warn_once) { - static struct bfd_hash_table *hash; - /* Only warn once about a particular undefined symbol. */ - if (hash == NULL) - { - hash = xmalloc (sizeof (struct bfd_hash_table)); - if (!bfd_hash_table_init (hash, bfd_hash_newfunc, - sizeof (struct bfd_hash_entry))) - 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")); + add_ignoresym (info, name); } /* We never print more than a reasonable number of errors in a row @@ -1410,8 +1360,6 @@ undefined_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED, else if (error) einfo ("%X"); } - - return TRUE; } /* Counter to limit the number of relocation overflow error messages @@ -1425,8 +1373,8 @@ int overflow_cutoff_limit = 10; /* This is called when a reloc overflows. */ -static bfd_boolean -reloc_overflow (struct bfd_link_info *info ATTRIBUTE_UNUSED, +static void +reloc_overflow (struct bfd_link_info *info, struct bfd_link_hash_entry *entry, const char *name, const char *reloc_name, @@ -1436,15 +1384,15 @@ reloc_overflow (struct bfd_link_info *info ATTRIBUTE_UNUSED, bfd_vma address) { if (overflow_cutoff_limit == -1) - return TRUE; + return; - einfo ("%X%C:", abfd, section, address); + einfo ("%X%H:", abfd, section, address); if (overflow_cutoff_limit >= 0 && overflow_cutoff_limit-- == 0) { einfo (_(" additional relocation overflows omitted from the output\n")); - return TRUE; + return; } if (entry) @@ -1456,16 +1404,18 @@ reloc_overflow (struct bfd_link_info *info ATTRIBUTE_UNUSED, { case bfd_link_hash_undefined: case bfd_link_hash_undefweak: - einfo (_(" relocation truncated to fit: %s against undefined symbol `%T'"), + einfo (_(" relocation truncated to fit: " + "%s against undefined symbol `%T'"), reloc_name, entry->root.string); break; case bfd_link_hash_defined: case bfd_link_hash_defweak: - einfo (_(" relocation truncated to fit: %s against symbol `%T' defined in %A section in %B"), + einfo (_(" relocation truncated to fit: " + "%s against symbol `%T' defined in %A section in %B"), reloc_name, entry->root.string, entry->u.def.section, entry->u.def.section == bfd_abs_section_ptr - ? output_bfd : entry->u.def.section->owner); + ? info->output_bfd : entry->u.def.section->owner); break; default: abort (); @@ -1478,52 +1428,63 @@ reloc_overflow (struct bfd_link_info *info ATTRIBUTE_UNUSED, if (addend != 0) einfo ("+%v", addend); einfo ("\n"); - return TRUE; } /* This is called when a dangerous relocation is made. */ -static bfd_boolean +static void reloc_dangerous (struct bfd_link_info *info ATTRIBUTE_UNUSED, const char *message, bfd *abfd, asection *section, bfd_vma address) { - einfo (_("%X%C: dangerous relocation: %s\n"), + einfo (_("%X%H: dangerous relocation: %s\n"), abfd, section, address, message); - return TRUE; } /* This is called when a reloc is being generated attached to a symbol that is not being output. */ -static bfd_boolean +static void unattached_reloc (struct bfd_link_info *info ATTRIBUTE_UNUSED, const char *name, bfd *abfd, asection *section, bfd_vma address) { - einfo (_("%X%C: reloc refers to symbol `%T' which is not being output\n"), + einfo (_("%X%H: reloc refers to symbol `%T' which is not being output\n"), abfd, section, address, 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. */ + using the -y option, while notice_all is set if the --cref option + has been supplied, or if there are any NOCROSSREFS sections in the + linker script; and if plugins are active, since they need to monitor + all references from non-IR files. */ static bfd_boolean notice (struct bfd_link_info *info, - const char *name, + struct bfd_link_hash_entry *h, + struct bfd_link_hash_entry *inh ATTRIBUTE_UNUSED, bfd *abfd, asection *section, - bfd_vma value) + bfd_vma value, + flagword flags ATTRIBUTE_UNUSED) { - if (! info->notice_all - || (info->notice_hash != NULL - && bfd_hash_lookup (info->notice_hash, name, FALSE, FALSE) != NULL)) + const char *name; + + if (h == NULL) + { + if (command_line.cref || nocrossref_list != NULL) + return handle_asneeded_cref (abfd, (enum notice_asneeded_action) value); + return TRUE; + } + + name = h->root.string; + if (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);