-/* Copyright (C) 1991 Free Software Foundation, Inc.
+/* Main program of GNU linker.
+ Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
+ 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
+ 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
-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.
+ 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 3 of the License, 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.
+ 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, 675 Mass Ave, Cambridge, MA 02139, USA. */
+ You should have received a copy of the GNU General Public License
+ 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 "bfd.h"
+#include "safe-ctype.h"
+#include "libiberty.h"
+#include "progress.h"
+#include "bfdlink.h"
+#include "filenames.h"
-#include "config.h"
#include "ld.h"
#include "ldmain.h"
#include "ldmisc.h"
#include "ldwrite.h"
-#include "ldgram.h"
-#include "ldsym.h"
+#include "ldexp.h"
#include "ldlang.h"
-#include "ldemul.h"
+#include <ldgram.h>
#include "ldlex.h"
#include "ldfile.h"
-#include "ldindr.h"
-#include "ldwarn.h"
+#include "ldemul.h"
#include "ldctor.h"
-#include "lderror.h"
+#ifdef ENABLE_PLUGINS
+#include "plugin.h"
+#include "plugin-api.h"
+#include "libbfd.h"
+#endif /* ENABLE_PLUGINS */
-/* Somewhere above, sys/stat.h got included . . . . */
+/* 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>
-static char *get_emulation ();
-static void set_scripts_dir ();
+#ifdef HAVE_SBRK
+#if !HAVE_DECL_SBRK
+extern void *sbrk ();
+#endif
+#endif
-/* IMPORTS */
-extern boolean lang_has_input_file;
-extern boolean force_make_executable;
-extern boolean relaxing;
-extern boolean had_script;
+#ifndef TARGET_SYSTEM_ROOT
+#define TARGET_SYSTEM_ROOT ""
+#endif
/* EXPORTS */
+FILE *saved_script_handle = NULL;
+FILE *previous_script_handle = NULL;
+bfd_boolean force_make_executable = FALSE;
+
char *default_target;
-char *output_filename = "a.out";
+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 if -y on the command line */
-int had_y;
+/* The prefix for system library directories. */
+const char *ld_sysroot;
-/* The local symbol prefix */
-char lprefix = 'L';
+/* The canonical representation of ld_sysroot. */
+char * ld_canon_sysroot;
+int ld_canon_sysroot_len;
/* Set by -G argument, for MIPS ECOFF target. */
int g_switch_value = 8;
-/* Count the number of global symbols multiply defined. */
-int multiple_def_count;
-
-/* Count the number of symbols defined through common declarations.
- This count is referenced in symdef_library, linear_library, and
- modified by enter_global_ref.
-
- It is incremented when a symbol is created as a common, and
- decremented when the common declaration is overridden
-
- Another way of thinking of it is that this is a count of
- all ldsym_types with a ->scoms field */
-
-unsigned int commons_pending;
-
-/* Count the number of global symbols referenced and not defined.
- common symbols are not included in this count. */
-
-unsigned int undefined_global_sym_count;
-
/* Nonzero means print names of input files as processed. */
-boolean trace_files;
+bfd_boolean trace_files;
/* Nonzero means same, but note open failures, too. */
-boolean trace_file_tries;
+bfd_boolean trace_file_tries;
-/* 1 => write load map. */
-boolean write_map;
+/* Nonzero means version number was printed, so exit successfully
+ instead of complaining if no input files are given. */
+bfd_boolean version_printed;
-#ifdef GNU960
-/* Indicates whether output file will be b.out (default) or coff */
-enum target_flavour output_flavor = BFD_BOUT_FORMAT;
-#endif
+/* Nonzero means link in every member of an archive. */
+bfd_boolean whole_archive;
-/* A count of the total number of local symbols ever seen - by adding
- the symbol_count field of each newly read afile.*/
+/* True means only create DT_NEEDED entries for dynamic libraries
+ if they actually satisfy some reference in a regular object. */
+bfd_boolean add_DT_NEEDED_for_regular;
-unsigned int total_symbols_seen;
+/* True means create DT_NEEDED entries for dynamic libraries that
+ are DT_NEEDED by dynamic libraries specifically mentioned on
+ the command line. */
+bfd_boolean add_DT_NEEDED_for_dynamic;
-/* A count of the number of read files - the same as the number of elements
- in file_chain
- */
-unsigned int total_files_seen;
+/* TRUE if we should demangle symbol names. */
+bfd_boolean demangling;
args_type command_line;
ld_config_type config;
+
+sort_type sort_section;
+
+static const char *get_sysroot
+ (int, char **);
+static char *get_emulation
+ (int, char **);
+static bfd_boolean add_archive_element
+ (struct bfd_link_info *, bfd *, const char *, bfd **);
+static bfd_boolean multiple_definition
+ (struct bfd_link_info *, struct bfd_link_hash_entry *,
+ bfd *, asection *, bfd_vma);
+static bfd_boolean multiple_common
+ (struct bfd_link_info *, struct bfd_link_hash_entry *,
+ bfd *, enum bfd_link_hash_type, bfd_vma);
+static bfd_boolean 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
+ (struct bfd_link_info *, bfd_boolean, const char *, bfd *,
+ asection *, bfd_vma);
+static bfd_boolean 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
+ (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma,
+ bfd_boolean);
+static bfd_boolean 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
+ (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma);
+static bfd_boolean unattached_reloc
+ (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma);
+static bfd_boolean notice
+ (struct bfd_link_info *, struct bfd_link_hash_entry *,
+ bfd *, asection *, bfd_vma, flagword, const char *);
+
+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,
+ einfo,
+ info_msg,
+ minfo,
+ ldlang_override_segment_assignment
+};
+
+struct bfd_link_info link_info;
\f
-void
-main (argc, argv)
- char **argv;
- int argc;
+static void
+ld_cleanup (void)
+{
+ bfd_cache_close_all ();
+#ifdef ENABLE_PLUGINS
+ plugin_call_cleanup ();
+#endif
+ if (output_filename && delete_output_file_on_failure)
+ unlink_if_ordinary (output_filename);
+}
+
+int
+main (int argc, char **argv)
{
char *emulation;
+ long start_time = get_run_time ();
- program_name = argv[0];
+#if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
+ setlocale (LC_MESSAGES, "");
+#endif
+#if defined (HAVE_SETLOCALE)
+ setlocale (LC_CTYPE, "");
+#endif
+ bindtextdomain (PACKAGE, LOCALEDIR);
+ textdomain (PACKAGE);
- bfd_init ();
+ program_name = argv[0];
+ xmalloc_set_program_name (program_name);
- /* Initialize the data about options. */
+ START_PROGRESS (program_name, 0);
+ expandargv (&argc, &argv);
- trace_files = trace_file_tries = false;
- write_map = false;
- config.relocateable_output = false;
- command_line.force_common_definition = false;
+ bfd_init ();
- init_bfd_error_vector ();
- ldsym_init ();
- ldfile_add_arch ("");
+ bfd_set_error_program_name (program_name);
- set_scripts_dir ();
+ xatexit (ld_cleanup);
- config.make_executable = true;
- force_make_executable = false;
+ /* 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);
+ }
+ if (ld_canon_sysroot)
+ ld_canon_sysroot_len = strlen (ld_canon_sysroot);
+ else
+ ld_canon_sysroot_len = -1;
+ /* 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 cumulative counts of symbols. */
- undefined_global_sym_count = 0;
- multiple_def_count = 0;
- commons_pending = 0;
+#if YYDEBUG
+ {
+ extern int yydebug;
+ yydebug = 1;
+ }
+#endif
- config.magic_demand_paged = true;
- config.text_read_only = true;
- config.make_executable = true;
+ config.build_constructors = TRUE;
+ config.rpath_separator = ':';
+ config.split_by_reloc = (unsigned) -1;
+ config.split_by_file = (bfd_size_type) -1;
+ config.make_executable = TRUE;
+ config.magic_demand_paged = TRUE;
+ config.text_read_only = TRUE;
+
+ command_line.warn_mismatch = TRUE;
+ command_line.warn_search_mismatch = TRUE;
+ command_line.check_section_addresses = -1;
+ command_line.disable_target_specific_optimizations = -1;
+
+ /* 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.allow_undefined_version = TRUE;
+ link_info.keep_memory = TRUE;
+ link_info.combreloc = TRUE;
+ link_info.strip_discarded = TRUE;
+ link_info.emit_hash = TRUE;
+ link_info.callbacks = &link_callbacks;
+ 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.pei386_auto_import = -1;
+ link_info.spare_dynamic_tags = 5;
+ link_info.path_separator = ':';
+ ldfile_add_arch ("");
emulation = get_emulation (argc, argv);
ldemul_choose_mode (emulation);
- default_target = ldemul_choose_target ();
+ 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 ();
ldemul_before_parse ();
- lang_has_input_file = false;
+ lang_has_input_file = FALSE;
parse_args (argc, argv);
- if (had_script == false)
+ if (config.hash_table_size != 0)
+ bfd_hash_set_default_size (config.hash_table_size);
+
+#ifdef ENABLE_PLUGINS
+ /* Now all the plugin arguments have been gathered, we can load them. */
+ if (plugin_load_plugins ())
+ einfo (_("%P%F: %s: error loading plugin\n"), plugin_error_plugin ());
+#endif /* ENABLE_PLUGINS */
+
+ ldemul_set_symbols ();
+
+ /* 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)
{
- /* Read the emulation's appropriate default script. */
- char *scriptname = ldemul_get_script ();
- /* sizeof counts the terminating NUL. */
- size_t size = strlen (scriptname) + sizeof ("-T /ldscripts/");
- char *buf = (char *) ldmalloc(size);
- /* The initial slash prevents finding the script in `.' first. */
- sprintf (buf, "-T /ldscripts/%s", scriptname);
- parse_line (buf, 0);
- free (buf);
+ ldfile_open_command_file (command_line.default_script);
+ parser_input = input_script;
+ yyparse ();
}
- if (config.relocateable_output && command_line.relax)
+ /* If we have not already opened and parsed a linker script
+ read the emulation's appropriate default script. */
+ if (saved_script_handle == NULL)
{
- einfo ("%P%F: -relax and -r may not be used together\n");
+ int isfile;
+ char *s = ldemul_get_script (&isfile);
+
+ if (isfile)
+ ldfile_open_default_command_file (s);
+ else
+ {
+ lex_string = s;
+ lex_redirect (s);
+ }
+ parser_input = input_script;
+ yyparse ();
+ lex_string = NULL;
}
- lang_final ();
- if (lang_has_input_file == false)
+ if (trace_file_tries)
{
- einfo ("%P%F: No input files\n");
+ if (saved_script_handle)
+ info_msg (_("using external linker script:"));
+ else
+ info_msg (_("using internal linker script:"));
+ info_msg ("\n==================================================\n");
+
+ if (saved_script_handle)
+ {
+ static const int ld_bufsz = 8193;
+ size_t n;
+ char *buf = (char *) xmalloc (ld_bufsz);
+
+ rewind (saved_script_handle);
+ while ((n = fread (buf, 1, ld_bufsz - 1, saved_script_handle)) > 0)
+ {
+ buf[n] = 0;
+ info_msg (buf);
+ }
+ rewind (saved_script_handle);
+ free (buf);
+ }
+ else
+ {
+ int isfile;
+
+ info_msg (ldemul_get_script (&isfile));
+ }
+
+ info_msg ("\n==================================================\n");
}
- if (trace_files)
+ if (command_line.print_output_format)
+ info_msg ("%s\n", lang_get_output_target ());
+
+ lang_final ();
+
+ if (!lang_has_input_file)
{
- info ("%P: mode %s\n", emulation);
+ if (version_printed || command_line.print_output_format)
+ xexit (0);
+ einfo (_("%P%F: no input files\n"));
}
- ldemul_after_parse ();
+ if (trace_files)
+ info_msg (_("%P: mode %s\n"), emulation);
+ ldemul_after_parse ();
if (config.map_filename)
{
config.map_file = fopen (config.map_filename, FOPEN_WT);
if (config.map_file == (FILE *) NULL)
{
- einfo ("%P%F: cannot open map file %s: %E\n",
+ 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 */
+ symbols, and possibly multiple definitions. */
+ if (link_info.relocatable)
+ link_info.output_bfd->flags &= ~EXEC_P;
+ else
+ link_info.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 ();
+ lang_finish ();
- if (config.text_read_only)
+ /* Even if we're producing relocatable output, some non-fatal errors should
+ be reported in the exit status. (What non-fatal errors, if any, do we
+ want to ignore for relocatable output?) */
+ if (!config.make_executable && !force_make_executable)
{
- /* Look for a text section and mark the readonly attribute in it */
- asection *found = bfd_get_section_by_name (output_bfd, ".text");
+ if (trace_files)
+ einfo (_("%P: link errors found, deleting executable `%s'\n"),
+ output_filename);
- if (found != (asection *) NULL)
- {
- found->flags |= SEC_READONLY;
- }
+ /* The file will be removed by ld_cleanup. */
+ xexit (1);
}
-
- if (config.relocateable_output)
- output_bfd->flags &= ~EXEC_P;
else
- output_bfd->flags |= EXEC_P;
+ {
+ if (! bfd_close (link_info.output_bfd))
+ einfo (_("%F%B: final close failed: %E\n"), link_info.output_bfd);
- ldwrite ();
+ /* 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)
+ {
+ int len = strlen (output_filename);
- /* 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 (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 = (char *) xmalloc (bsize);
+ int l;
+ char *dst_name = (char *) 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 (config.make_executable == false && force_make_executable == false)
- {
- if (trace_files == true)
- {
- einfo ("%P: Link errors found, deleting executable `%s'\n",
- output_filename);
+ 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);
+ }
}
+ }
- if (output_bfd->iostream)
- fclose ((FILE *) (output_bfd->iostream));
+ END_PROGRESS (program_name);
- unlink (output_filename);
- exit (1);
+ if (config.stats)
+ {
+#ifdef HAVE_SBRK
+ 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));
+#endif
+ fflush (stderr);
}
- else
+
+ /* Prevent ld_cleanup from doing anything, after a successful link. */
+ output_filename = NULL;
+
+ xexit (0);
+ return 0;
+}
+
+/* If the configured sysroot is relocatable, try relocating it based on
+ default prefix FROM. Return the relocated directory if it exists,
+ otherwise return null. */
+
+static char *
+get_relative_sysroot (const char *from ATTRIBUTE_UNUSED)
+{
+#ifdef TARGET_SYSTEM_ROOT_RELOCATABLE
+ char *path;
+ struct stat s;
+
+ path = make_relative_prefix (program_name, from, TARGET_SYSTEM_ROOT);
+ if (path)
{
- bfd_close (output_bfd);
+ if (stat (path, &s) == 0 && S_ISDIR (s.st_mode))
+ return path;
+ free (path);
}
+#endif
+ return 0;
+}
+
+/* Return the sysroot directory. Return "" if no sysroot is being used. */
+
+static const char *
+get_sysroot (int argc, char **argv)
+{
+ int i;
+ const char *path;
- exit (0);
+ for (i = 1; i < argc; i++)
+ if (CONST_STRNEQ (argv[i], "--sysroot="))
+ return argv[i] + strlen ("--sysroot=");
+
+ path = get_relative_sysroot (BINDIR);
+ if (path)
+ return path;
+
+ path = get_relative_sysroot (TOOLBINDIR);
+ if (path)
+ return path;
+
+ return TARGET_SYSTEM_ROOT;
}
/* 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;
+get_emulation (int argc, char **argv)
{
char *emulation;
int i;
-#ifdef GNU960
- check_v960 (argc, argv);
- emulation = "gld960";
- for (i = 1; i < argc; i++)
- {
- if (!strcmp (argv[i], "-Fcoff"))
- {
- emulation = "lnk960";
- output_flavor = BFD_COFF_FORMAT;
- break;
- }
- }
-#else
- emulation = (char *) getenv (EMULATION_ENVIRON);
+ emulation = getenv (EMULATION_ENVIRON);
if (emulation == NULL)
emulation = DEFAULT_EMULATION;
-#endif
for (i = 1; i < argc; i++)
{
- if (!strncmp (argv[i], "-m", 2))
+ if (CONST_STRNEQ (argv[i], "-m"))
{
if (argv[i][2] == '\0')
{
i++;
}
else
- {
- einfo("%P%F missing argument to -m\n");
- }
+ 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
+ || strcmp (argv[i], "-mips5") == 0
+ || strcmp (argv[i], "-mips32") == 0
+ || strcmp (argv[i], "-mips32r2") == 0
+ || strcmp (argv[i], "-mips64") == 0
+ || strcmp (argv[i], "-mips64r2") == 0)
+ {
+ /* FIXME: The arguments -mips1, -mips2, -mips3, etc. are
+ passed to the linker by some MIPS compilers. They
+ generally tell the linker to use a slightly different
+ library path. Perhaps someday these should be
+ implemented as emulations; until then, we just ignore
+ the arguments and hope that nobody ever creates
+ emulations named ips1, ips2 or ips3. */
+ }
+ else if (strcmp (argv[i], "-m486") == 0)
+ {
+ /* FIXME: The argument -m486 is passed to the linker on
+ some Linux systems. Hope that nobody creates an
+ emulation named 486. */
}
else
{
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 *) ldmalloc (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);
- 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 ()
+void
+add_ysym (const char *name)
{
- 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 *) ldmalloc (dirlen + 8);
- strncpy (dir, program_name, dirlen);
- dir[dirlen] = '\0';
- }
- else
+ if (link_info.notice_hash == NULL)
{
- dirlen = 1;
- dir = (char *) ldmalloc (dirlen + 8);
- strcpy (dir, ".");
+ 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"));
}
- 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. */
+ if (bfd_hash_lookup (link_info.notice_hash, name, TRUE, TRUE) == NULL)
+ einfo (_("%P%F: bfd_hash_lookup failed: %E\n"));
}
+/* Record a symbol to be wrapped, from the --wrap option. */
+
void
-read_entry_symbols (desc, entry)
- bfd *desc;
- struct lang_input_statement_struct *entry;
+add_wrap (const char *name)
{
- if (entry->asymbols == (asymbol **) NULL)
+ if (link_info.wrap_hash == NULL)
{
- bfd_size_type table_size = get_symtab_upper_bound (desc);
-
- entry->asymbols = (asymbol **) ldmalloc (table_size);
- entry->symbol_count = bfd_canonicalize_symtab (desc, entry->asymbols);
+ 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),
+ 61))
+ einfo (_("%P%F: bfd_hash_table_init failed: %E\n"));
}
-}
-
-/*
- * turn this item into a reference
- */
-void
-refize (sp, nlist_p)
- ldsym_type *sp;
- asymbol **nlist_p;
-{
- asymbol *sym = *nlist_p;
- sym->value = 0;
- sym->flags = 0;
- sym->section = &bfd_und_section;
- sym->udata = (PTR) (sp->srefs_chain);
- sp->srefs_chain = nlist_p;
+ if (bfd_hash_lookup (link_info.wrap_hash, name, TRUE, TRUE) == NULL)
+ einfo (_("%P%F: bfd_hash_lookup failed: %E\n"));
}
-/*
-This function is called for each name which is seen which has a global
-scope. It enters the name into the global symbol table in the correct
-symbol on the correct chain. Remember that each ldsym_type has three
-chains attatched, one of all definitions of a symbol, one of all
-references of a symbol and one of all common definitions of a symbol.
-
-When the function is over, the supplied is left connected to the bfd
-to which is was born, with its udata field pointing to the next member
-on the chain in which it has been inserted.
-
-A certain amount of jigery pokery is necessary since commons come
-along and upset things, we only keep one item in the common chain; the
-one with the biggest size seen sofar. When another common comes along
-it either bumps the previous definition into the ref chain, since it
-is bigger, or gets turned into a ref on the spot since the one on the
-common chain is already bigger. If a real definition comes along then
-the common gets bumped off anyway.
-
-Whilst all this is going on we keep a count of the number of multiple
-definitions seen, undefined global symbols and pending commons.
-*/
+/* Handle the -retain-symbols-file option. */
void
-enter_global_ref (nlist_p, name)
- asymbol ** nlist_p; /* pointer into symbol table from incoming bfd */
- CONST char *name; /* name of symbol in linker table */
+add_keepsyms_file (const char *filename)
{
- asymbol *sym = *nlist_p;
- ldsym_type *sp;
+ 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 == NULL)
+ {
+ bfd_set_error (bfd_error_system_call);
+ einfo ("%X%P: %s: %E\n", filename);
+ return;
+ }
- /* Lookup the name from the incoming bfd's symbol table in the
- linker's global symbol 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 = (char *) xmalloc (bufsize);
- flagword this_symbol_flags = sym->flags;
+ c = getc (file);
+ while (c != EOF)
+ {
+ while (ISSPACE (c))
+ c = getc (file);
- sp = ldsym_get (name);
+ if (c != EOF)
+ {
+ size_t len = 0;
+ while (! ISSPACE (c) && c != EOF)
+ {
+ buf[len] = c;
+ ++len;
+ if (len >= bufsize)
+ {
+ bufsize *= 2;
+ buf = (char *) xrealloc (buf, bufsize);
+ }
+ c = getc (file);
+ }
- /* If this symbol already has udata, it means that something strange
- has happened.
+ buf[len] = '\0';
- The strange thing is that we've had an undefined symbol resolved by
- an alias, but the thing the alias defined wasn't in the file. So
- the symbol got a udata entry, but the file wasn't loaded. Then
- later on the file was loaded, but we don't need to do this
- processing again */
+ if (bfd_hash_lookup (link_info.keep_hash, buf, TRUE, TRUE) == 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"));
- if (sym->udata)
- return;
+ free (buf);
+ link_info.strip = strip_some;
+}
+\f
+/* Callbacks from the BFD linker routines. */
+/* This is called when BFD has decided to include an archive member in
+ a link. */
- if (flag_is_constructor (this_symbol_flags))
+static bfd_boolean
+add_archive_element (struct bfd_link_info *info,
+ bfd *abfd,
+ const char *name,
+ bfd **subsbfd ATTRIBUTE_UNUSED)
+{
+ lang_input_statement_type *input;
+ lang_input_statement_type orig_input;
+
+ 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;
+
+ /* 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 (plugin_active_plugins_p () && !no_more_claiming)
{
- /* Add this constructor to the list we keep */
- ldlang_add_constructor (sp);
- /* Turn any commons into refs */
- if (sp->scoms_chain != (asymbol **) NULL)
+ /* We must offer this archive member to the plugins to claim. */
+ const char *filename = (bfd_my_archive (abfd) != NULL
+ ? bfd_my_archive (abfd)->filename : abfd->filename);
+ int fd = open (filename, O_RDONLY | O_BINARY);
+ if (fd >= 0)
{
- refize (sp, sp->scoms_chain);
- sp->scoms_chain = 0;
+ struct ld_plugin_input_file file;
+
+ /* Offset and filesize must refer to the individual archive
+ member, not the whole file, and must exclude the header.
+ Fortunately for us, that is how the data is stored in the
+ origin field of the bfd and in the arelt_data. */
+ file.name = filename;
+ file.offset = abfd->origin;
+ file.filesize = arelt_size (abfd);
+ file.fd = fd;
+ plugin_maybe_claim (&file, input);
+ if (input->claimed)
+ {
+ input->claim_archive = TRUE;
+ *subsbfd = input->the_bfd;
+ }
}
+ }
+#endif /* ENABLE_PLUGINS */
+ ldlang_add_file (input);
- }
- else
+ if (config.map_file != NULL)
{
- if (bfd_is_com_section (sym->section))
+ static bfd_boolean header_printed;
+ struct bfd_link_hash_entry *h;
+ bfd *from;
+ int len;
+
+ h = bfd_link_hash_lookup (info->hash, name, FALSE, FALSE, TRUE);
+
+ if (h == NULL)
+ from = NULL;
+ else
{
- /* If we have a definition of this symbol already then
- this common turns into a reference. Also we only
- ever point to the largest common, so if we
- have a common, but it's bigger that the new symbol
- the turn this into a reference too. */
- if (sp->sdefs_chain)
- {
- /* This is a common symbol, but we already have a definition
- for it, so just link it into the ref chain as if
- it were a reference */
- refize (sp, nlist_p);
- }
- else if (sp->scoms_chain)
+ switch (h->type)
{
- /* If we have a previous common, keep only the biggest */
- if ((*(sp->scoms_chain))->value > sym->value)
- {
- /* other common is bigger, throw this one away */
- refize (sp, nlist_p);
- }
- else if (sp->scoms_chain != nlist_p)
- {
- /* other common is smaller, throw that away */
- refize (sp, sp->scoms_chain);
- sp->scoms_chain = nlist_p;
- }
+ 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;
}
- else
- {
- /* This is the first time we've seen a common, so remember it
- - if it was undefined before, we know it's defined now. If
- the symbol has been marked as really being a constructor,
- then treat this as a ref
- */
- if (sp->flags & SYM_CONSTRUCTOR)
- {
- /* Turn this into a ref */
- refize (sp, nlist_p);
- }
- else
- {
- /* treat like a common */
- if (sp->srefs_chain)
- undefined_global_sym_count--;
+ }
- commons_pending++;
- sp->scoms_chain = nlist_p;
- }
- }
+ if (! header_printed)
+ {
+ char buf[100];
+
+ sprintf (buf, _("Archive member included because of file (symbol)\n\n"));
+ minfo ("%s", buf);
+ header_printed = TRUE;
}
- else if (sym->section != &bfd_und_section)
+ if (bfd_my_archive (abfd) == NULL)
{
- /* This is the definition of a symbol, add to def chain */
- if (sp->sdefs_chain && (*(sp->sdefs_chain))->section != sym->section)
- {
- /* Multiple definition */
- asymbol *sy = *(sp->sdefs_chain);
- lang_input_statement_type *stat =
- (lang_input_statement_type *) bfd_asymbol_bfd (sy)->usrdata;
- lang_input_statement_type *stat1 =
- (lang_input_statement_type *) bfd_asymbol_bfd (sym)->usrdata;
- asymbol **stat1_symbols = stat1 ? stat1->asymbols : 0;
- asymbol **stat_symbols = stat ? stat->asymbols : 0;
-
- multiple_def_count++;
- einfo ("%X%C: multiple definition of `%T'\n",
- bfd_asymbol_bfd (sym), sym->section, stat1_symbols, sym->value, sym);
-
- einfo ("%X%C: first seen here\n",
- bfd_asymbol_bfd (sy), sy->section, stat_symbols, sy->value);
- }
- else
- {
- sym->udata = (PTR) (sp->sdefs_chain);
- sp->sdefs_chain = nlist_p;
- }
- /* A definition overrides a common symbol */
- if (sp->scoms_chain)
- {
- refize (sp, sp->scoms_chain);
- sp->scoms_chain = 0;
- commons_pending--;
- }
- else if (sp->srefs_chain && relaxing == false)
- {
- /* If previously was undefined, then remember as defined */
- undefined_global_sym_count--;
- }
+ minfo ("%s", bfd_get_filename (abfd));
+ len = strlen (bfd_get_filename (abfd));
}
else
{
- if (sp->scoms_chain == (asymbol **) NULL
- && sp->srefs_chain == (asymbol **) NULL
- && sp->sdefs_chain == (asymbol **) NULL)
- {
- /* And it's the first time we've seen it */
- undefined_global_sym_count++;
-
- }
-
- refize (sp, nlist_p);
+ 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);
}
- }
- ASSERT (sp->sdefs_chain == 0 || sp->scoms_chain == 0);
- ASSERT (sp->scoms_chain == 0 || (*(sp->scoms_chain))->udata == 0);
+ 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", &orig_input);
+ return TRUE;
}
-static void
-enter_file_symbols (entry)
- lang_input_statement_type *entry;
-{
- asymbol **q;
+/* This is called when BFD has discovered a symbol which is defined
+ multiple times. */
- entry->common_section =
- bfd_make_section_old_way (entry->the_bfd, "COMMON");
- entry->common_section->flags = SEC_NEVER_LOAD;
- ldlang_add_file (entry);
+static bfd_boolean
+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 TRUE;
- if (trace_files || trace_file_tries)
+ switch (h->type)
{
- info ("%I\n", entry);
+ 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 ();
}
- total_symbols_seen += entry->symbol_count;
- total_files_seen++;
- if (entry->symbol_count)
+ /* 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 TRUE;
+
+ /* 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;
+
+ name = h->root.string;
+ if (nbfd == NULL)
{
- for (q = entry->asymbols; *q; q++)
- {
- asymbol *p = *q;
-
- if (had_y && p->name)
- {
- /* look up the symbol anyway to see if the trace bit was
- set */
- ldsym_type *s = ldsym_get (p->name);
- if (s->flags & SYM_Y)
- {
- einfo ("%B: %s %T\n", entry->the_bfd,
- p->section == &bfd_und_section ? "reference to" : "definition of ",
- p);
- }
- }
-
- if (p->section == &bfd_ind_section)
- {
- add_indirect (q);
- }
- else if (p->flags & BSF_WARNING)
- {
- add_warning (p);
- }
- else if (p->section == &bfd_und_section
- || (p->flags & BSF_GLOBAL)
- || bfd_is_com_section (p->section)
- || (p->flags & BSF_CONSTRUCTOR))
-
- {
-
- asymbol *p = *q;
-
- if (p->flags & BSF_INDIRECT)
- {
- add_indirect (q);
- }
- else if (p->flags & BSF_WARNING)
- {
- add_warning (p);
- }
- else if (p->section == &bfd_und_section
- || (p->flags & BSF_GLOBAL)
- || bfd_is_com_section (p->section)
- || (p->flags & BSF_CONSTRUCTOR))
- {
- enter_global_ref (q, p->name);
- }
-
- }
-
- }
+ 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);
-/* Searching libraries */
-
-struct lang_input_statement_struct *decode_library_subfile ();
-void linear_library (), symdef_library ();
+ if (RELAXATION_ENABLED)
+ {
+ einfo (_("%P: Disabling relaxation: it will not work with multiple definitions\n"));
+ command_line.disable_target_specific_optimizations = -1;
+ }
-/* Search the library ENTRY, already open on descriptor DESC.
- This means deciding which library members to load,
- making a chain of `struct lang_input_statement_struct' for those members,
- and entering their global symbols in the hash table. */
+ return TRUE;
+}
-void
-search_library (entry)
- struct lang_input_statement_struct *entry;
+/* This is called when there is a definition of a common symbol, or
+ when a common symbol is found for a symbol that is already defined,
+ or when two common symbols are found. We only do something if
+ -warn-common was used. */
+
+static bfd_boolean
+multiple_common (struct bfd_link_info *info ATTRIBUTE_UNUSED,
+ struct bfd_link_hash_entry *h,
+ bfd *nbfd,
+ enum bfd_link_hash_type ntype,
+ bfd_vma nsize)
{
+ const char *name;
+ bfd *obfd;
+ enum bfd_link_hash_type otype;
+ bfd_vma osize;
- /* No need to load a library if no undefined symbols */
- if (!undefined_global_sym_count)
- return;
+ if (!config.warn_common)
+ return TRUE;
- if (bfd_has_map (entry->the_bfd))
- symdef_library (entry);
+ 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
- linear_library (entry);
-
-}
-
-#ifdef GNU960
-static
- boolean
-gnu960_check_format (abfd, format)
- bfd *abfd;
- bfd_format format;
-{
- boolean retval;
-
- if ((bfd_check_format (abfd, format) == true)
- && (abfd->xvec->flavour == output_flavor))
{
- return true;
+ /* 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;
}
-
- return false;
-}
-
-#endif
-
-void
-ldmain_open_file_read_symbol (entry)
- struct lang_input_statement_struct *entry;
-{
- if (entry->asymbols == (asymbol **) NULL
- && entry->real == true
- && entry->filename != (char *) NULL)
+ if (ntype == bfd_link_hash_defined
+ || ntype == bfd_link_hash_defweak
+ || ntype == bfd_link_hash_indirect)
{
- ldfile_open_file (entry);
-
-
-#ifdef GNU960
- if (gnu960_check_format (entry->the_bfd, bfd_object))
-#else
- if (bfd_check_format (entry->the_bfd, bfd_object))
-#endif
+ 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)
{
- entry->the_bfd->usrdata = (PTR) entry;
-
-
- read_entry_symbols (entry->the_bfd, entry);
-
- /* look through the sections in the file and see if any of them
- are constructors */
- ldlang_check_for_constructors (entry);
-
- enter_file_symbols (entry);
+ 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);
}
-#ifdef GNU960
- else if (gnu960_check_format (entry->the_bfd, bfd_archive))
-#else
- else if (bfd_check_format (entry->the_bfd, bfd_archive))
-#endif
+ else if (nsize > osize)
{
- entry->the_bfd->usrdata = (PTR) entry;
-
- entry->subfiles = (lang_input_statement_type *) NULL;
- search_library (entry);
+ 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 ("%F%B: malformed input file (not rel or archive) \n",
- entry->the_bfd);
+ einfo (_("%B: warning: multiple common of `%T'\n"), nbfd, name);
+ if (obfd != NULL)
+ einfo (_("%B: warning: previous common is here\n"), obfd);
}
}
+ return TRUE;
}
-/* Construct and return a lang_input_statement_struct for a library member.
- The library's lang_input_statement_struct is library_entry,
- and the library is open on DESC.
- SUBFILE_OFFSET is the byte index in the library of this member's header.
- We store the length of the member into *LENGTH_LOC. */
-
-lang_input_statement_type *
-decode_library_subfile (library_entry, subfile_offset)
- struct lang_input_statement_struct *library_entry;
- bfd *subfile_offset;
+/* 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
+add_to_set (struct bfd_link_info *info ATTRIBUTE_UNUSED,
+ struct bfd_link_hash_entry *h,
+ bfd_reloc_code_real_type reloc,
+ bfd *abfd,
+ asection *section,
+ bfd_vma value)
{
- register struct lang_input_statement_struct *subentry;
+ if (config.warn_constructors)
+ einfo (_("%P: warning: global constructor %s used\n"),
+ h->root.string);
+ if (! config.build_constructors)
+ return TRUE;
- /* First, check if we already have a loaded
- lang_input_statement_struct for this library subfile. If so,
- just return it. Otherwise, allocate some space and build a new one. */
+ ldctor_add_set_entry (h, reloc, NULL, section, value);
- if (subfile_offset->usrdata
- && ((struct lang_input_statement_struct *) subfile_offset->usrdata)->
- loaded == true)
- {
- subentry = (struct lang_input_statement_struct *) subfile_offset->usrdata;
- }
- else
+ if (h->type == bfd_link_hash_new)
{
- subentry =
- (struct lang_input_statement_struct *)
- ldmalloc ((bfd_size_type) (sizeof (struct lang_input_statement_struct)));
-
- subentry->filename = subfile_offset->filename;
- subentry->local_sym_name = subfile_offset->filename;
- subentry->asymbols = 0;
- subentry->the_bfd = subfile_offset;
- subentry->subfiles = 0;
- subentry->next = 0;
- subentry->superfile = library_entry;
- subentry->is_archive = false;
-
- subentry->just_syms_flag = false;
- subentry->loaded = false;
- subentry->chain = 0;
+ 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 subentry;
+
+ return TRUE;
}
-boolean subfile_wanted_p ();
-void
-clear_syms (entry, offset)
- struct lang_input_statement_struct *entry;
- file_ptr offset;
+/* 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 bfd_boolean
+constructor_callback (struct bfd_link_info *info,
+ bfd_boolean constructor,
+ const char *name,
+ bfd *abfd,
+ asection *section,
+ bfd_vma value)
{
- carsym *car;
- unsigned long indx = bfd_get_next_mapent (entry->the_bfd,
- BFD_NO_MORE_SYMBOLS,
- &car);
+ 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 (link_info.output_bfd, BFD_RELOC_CTOR) == NULL
+ && (info->relocatable
+ || 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__");
- while (indx != BFD_NO_MORE_SYMBOLS)
+ 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)
{
- if (car->file_offset == offset)
- {
- car->name = 0;
- }
- indx = bfd_get_next_mapent (entry->the_bfd, indx, &car);
+ 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;
}
-/* Search a library that has a map
- */
-void
-symdef_library (entry)
- struct lang_input_statement_struct *entry;
+/* A structure used by warning_callback to pass information through
+ bfd_map_over_sections. */
+struct warning_callback_info
{
- register struct lang_input_statement_struct *prev = 0;
-
- boolean not_finished = true;
-
- while (not_finished == true)
+ bfd_boolean found;
+ const char *warning;
+ const char *symbol;
+ asymbol **asymbols;
+};
+
+/* This is called when there is a reference to a warning symbol. */
+
+static bfd_boolean
+warning_callback (struct bfd_link_info *info ATTRIBUTE_UNUSED,
+ const char *warning,
+ const char *symbol,
+ bfd *abfd,
+ asection *section,
+ bfd_vma address)
+{
+ /* This is a hack to support warn_multiple_gp. FIXME: This should
+ have a cleaner interface, but what? */
+ if (! config.warn_multiple_gp
+ && strcmp (warning, "using multiple gp values") == 0)
+ return TRUE;
+
+ if (section != NULL)
+ einfo ("%C: %s%s\n", abfd, section, address, _("warning: "), warning);
+ else if (abfd == NULL)
+ einfo ("%P: %s%s\n", _("warning: "), warning);
+ else if (symbol == NULL)
+ einfo ("%B: %s%s\n", abfd, _("warning: "), warning);
+ else
{
- carsym *exported_library_name;
- bfd *prev_archive_member_bfd = 0;
-
- int idx = bfd_get_next_mapent (entry->the_bfd,
- BFD_NO_MORE_SYMBOLS,
- &exported_library_name);
-
- not_finished = false;
+ struct warning_callback_info cinfo;
- while (idx != BFD_NO_MORE_SYMBOLS && undefined_global_sym_count)
- {
+ /* Look through the relocs to see if we can find a plausible
+ address. */
- if (exported_library_name->name)
- {
+ if (!bfd_generic_link_read_symbols (abfd))
+ einfo (_("%B%F: could not read symbols: %E\n"), abfd);
- ldsym_type *sp = ldsym_get_soft (exported_library_name->name);
+ cinfo.found = FALSE;
+ cinfo.warning = warning;
+ cinfo.symbol = symbol;
+ cinfo.asymbols = bfd_get_outsymbols (abfd);
+ bfd_map_over_sections (abfd, warning_find_reloc, &cinfo);
- /* If we find a symbol that appears to be needed, think carefully
- about the archive member that the symbol is in. */
- /* So - if it exists, and is referenced somewhere and is
- undefined or */
- if (sp && sp->srefs_chain && !sp->sdefs_chain)
- {
- bfd *archive_member_bfd = bfd_get_elt_at_index (entry->the_bfd, idx);
- struct lang_input_statement_struct *archive_member_lang_input_statement_struct;
-
-#ifdef GNU960
- if (archive_member_bfd && gnu960_check_format (archive_member_bfd, bfd_object))
-#else
- if (archive_member_bfd && bfd_check_format (archive_member_bfd, bfd_object))
-#endif
- {
-
- /* Don't think carefully about any archive member
- more than once in a given pass. */
- if (prev_archive_member_bfd != archive_member_bfd)
- {
-
- prev_archive_member_bfd = archive_member_bfd;
-
- /* Read the symbol table of the archive member. */
-
- if (archive_member_bfd->usrdata != (PTR) NULL)
- {
+ if (! cinfo.found)
+ einfo ("%B: %s%s\n", abfd, _("warning: "), warning);
+ }
- archive_member_lang_input_statement_struct = (lang_input_statement_type *) archive_member_bfd->usrdata;
- }
- else
- {
+ return TRUE;
+}
- archive_member_lang_input_statement_struct =
- decode_library_subfile (entry, archive_member_bfd);
- archive_member_bfd->usrdata = (PTR) archive_member_lang_input_statement_struct;
+/* 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 (bfd *abfd, asection *sec, void *iarg)
+{
+ struct warning_callback_info *info = (struct warning_callback_info *) iarg;
+ long relsize;
+ arelent **relpp;
+ long relcount;
+ arelent **p, **pend;
- if (archive_member_lang_input_statement_struct == 0)
- {
- einfo ("%F%I contains invalid archive member %s\n",
- entry, sp->name);
- }
+ if (info->found)
+ return;
- if (archive_member_lang_input_statement_struct->loaded == false)
- {
+ 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;
- read_entry_symbols (archive_member_bfd, archive_member_lang_input_statement_struct);
- /* Now scan the symbol table and decide whether to load. */
+ 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 (subfile_wanted_p (archive_member_lang_input_statement_struct) == true)
+ 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%s\n", abfd, sec, q->address, _("warning: "),
+ info->warning);
+ info->found = TRUE;
+ break;
+ }
+ }
- {
- /* This member is needed; load it.
- Since we are loading something on this pass,
- we must make another pass through the symdef data. */
+ free (relpp);
+}
- not_finished = true;
+/* This is called when an undefined symbol is found. */
- enter_file_symbols (archive_member_lang_input_statement_struct);
+static bfd_boolean
+undefined_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED,
+ const char *name,
+ bfd *abfd,
+ asection *section,
+ bfd_vma address,
+ bfd_boolean error)
+{
+ static char *error_name;
+ static unsigned int error_count;
- if (prev)
- prev->chain = archive_member_lang_input_statement_struct;
- else
- entry->subfiles = archive_member_lang_input_statement_struct;
+#define MAX_ERRORS_IN_A_ROW 5
+ if (config.warn_once)
+ {
+ static struct bfd_hash_table *hash;
- prev = archive_member_lang_input_statement_struct;
+ /* 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,
+ 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;
- /* Clear out this member's symbols from the symdef data
- so that following passes won't waste time on them. */
- clear_syms (entry, exported_library_name->file_offset);
- archive_member_lang_input_statement_struct->loaded = true;
- }
- }
- }
- }
- }
- }
- idx = bfd_get_next_mapent (entry->the_bfd, idx, &exported_library_name);
- }
+ if (bfd_hash_lookup (hash, name, TRUE, TRUE) == NULL)
+ einfo (_("%F%P: bfd_hash_lookup failed: %E\n"));
}
-}
-
-void
-linear_library (entry)
- struct lang_input_statement_struct *entry;
-{
- boolean more_to_do = true;
- register struct lang_input_statement_struct *prev = 0;
- if (entry->complained == false)
+ /* We never print more than a reasonable number of errors in a row
+ for a single symbol. */
+ if (error_name != NULL
+ && strcmp (name, error_name) == 0)
+ ++error_count;
+ else
{
- if (entry->the_bfd->xvec->flavour != bfd_target_ieee_flavour)
+ error_count = 0;
+ if (error_name != NULL)
+ free (error_name);
+ error_name = xstrdup (name);
+ }
+ if (section != NULL)
+ {
+ if (error_count < MAX_ERRORS_IN_A_ROW)
{
- /* IEEE can use table of contents, so this message is bogus */
- einfo ("%P: library %s has bad table of contents, rerun ranlib\n",
- entry->the_bfd->filename);
+ if (error)
+ einfo (_("%X%C: undefined reference to `%T'\n"),
+ abfd, section, address, name);
+ else
+ einfo (_("%C: warning: undefined reference to `%T'\n"),
+ abfd, section, address, name);
}
- entry->complained = true;
-
+ else if (error_count == MAX_ERRORS_IN_A_ROW)
+ {
+ if (error)
+ einfo (_("%X%D: more undefined references to `%T' follow\n"),
+ abfd, section, address, name);
+ else
+ einfo (_("%D: warning: more undefined references to `%T' follow\n"),
+ abfd, section, address, name);
+ }
+ else if (error)
+ einfo ("%X");
}
- while (more_to_do)
+ else
{
-
- bfd *archive = bfd_openr_next_archived_file (entry->the_bfd, 0);
-
- more_to_do = false;
- while (archive)
+ if (error_count < MAX_ERRORS_IN_A_ROW)
{
- /* Don't check this file if it's already been read in
- once */
-
- if (!archive->usrdata ||
- !((lang_input_statement_type *) (archive->usrdata))->loaded)
- {
-#ifdef GNU960
- if (gnu960_check_format (archive, bfd_object))
-#else
- if (bfd_check_format (archive, bfd_object))
-#endif
- {
- register struct lang_input_statement_struct *subentry;
-
- subentry = decode_library_subfile (entry,
- archive);
-
- archive->usrdata = (PTR) subentry;
- if (!subentry)
- return;
- if (subentry->loaded == false)
- {
- read_entry_symbols (archive, subentry);
-
- if (subfile_wanted_p (subentry) == true)
- {
- enter_file_symbols (subentry);
-
- if (prev)
- prev->chain = subentry;
- else
- entry->subfiles = subentry;
- prev = subentry;
-
- more_to_do = true;
- subentry->loaded = true;
- }
- }
- }
- }
- archive = bfd_openr_next_archived_file (entry->the_bfd, archive);
-
+ if (error)
+ einfo (_("%X%B: undefined reference to `%T'\n"),
+ abfd, name);
+ else
+ einfo (_("%B: warning: undefined reference to `%T'\n"),
+ abfd, name);
}
-
+ else if (error_count == MAX_ERRORS_IN_A_ROW)
+ {
+ if (error)
+ einfo (_("%X%B: more undefined references to `%T' follow\n"),
+ abfd, name);
+ else
+ einfo (_("%B: warning: more undefined references to `%T' follow\n"),
+ abfd, name);
+ }
+ else if (error)
+ einfo ("%X");
}
-}
-/* ENTRY is an entry for a file inside an archive
- Its symbols have been read into core, but not entered into the
- linker ymbol table
- Return nonzero if we ought to load this file */
+ return TRUE;
+}
-boolean
-subfile_wanted_p (entry)
- struct lang_input_statement_struct *entry;
+/* Counter to limit the number of relocation overflow error messages
+ to print. Errors are printed as it is decremented. When it's
+ called and the counter is zero, a final message is printed
+ indicating more relocations were omitted. When it gets to -1, no
+ such errors are printed. If it's initially set to a value less
+ than -1, all such errors will be printed (--verbose does this). */
+
+int overflow_cutoff_limit = 10;
+
+/* This is called when a reloc overflows. */
+
+static bfd_boolean
+reloc_overflow (struct bfd_link_info *info ATTRIBUTE_UNUSED,
+ struct bfd_link_hash_entry *entry,
+ const char *name,
+ const char *reloc_name,
+ bfd_vma addend,
+ bfd *abfd,
+ asection *section,
+ bfd_vma address)
{
- asymbol **q;
+ if (overflow_cutoff_limit == -1)
+ return TRUE;
- if (entry->symbol_count == 0)
- return false;
+ einfo ("%X%H:", abfd, section, address);
- for (q = entry->asymbols; *q; q++)
+ if (overflow_cutoff_limit >= 0
+ && overflow_cutoff_limit-- == 0)
{
- asymbol *p = *q;
-
- /* If the symbol has an interesting definition, we could
- potentially want it. */
+ einfo (_(" additional relocation overflows omitted from the output\n"));
+ return TRUE;
+ }
- if (p->flags & BSF_INDIRECT)
+ if (entry)
+ {
+ while (entry->type == bfd_link_hash_indirect
+ || entry->type == bfd_link_hash_warning)
+ entry = entry->u.i.link;
+ switch (entry->type)
{
- /** add_indirect(q);*/
+ case bfd_link_hash_undefined:
+ case bfd_link_hash_undefweak:
+ 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"),
+ reloc_name, entry->root.string,
+ entry->u.def.section,
+ entry->u.def.section == bfd_abs_section_ptr
+ ? link_info.output_bfd : entry->u.def.section->owner);
+ break;
+ default:
+ abort ();
+ break;
}
+ }
+ else
+ einfo (_(" relocation truncated to fit: %s against `%T'"),
+ reloc_name, name);
+ if (addend != 0)
+ einfo ("+%v", addend);
+ einfo ("\n");
+ return TRUE;
+}
- if (bfd_is_com_section (p->section)
- || (p->flags & BSF_GLOBAL)
- || (p->flags & BSF_INDIRECT))
- {
- register ldsym_type *sp = ldsym_get_soft (p->name);
+/* This is called when a dangerous relocation is made. */
- /* If this symbol has not been hashed,
- we can't be looking for it. */
- if (sp != (ldsym_type *) NULL
- && sp->sdefs_chain == (asymbol **) NULL)
- {
- if (sp->srefs_chain != (asymbol **) NULL
- || sp->scoms_chain != (asymbol **) NULL)
- {
- /* This is a symbol we are looking for. It is
- either not yet defined or common. If this is a
- common symbol, then if the symbol in the object
- file is common, we need to combine sizes. But if
- we already have a common symbol, and the symbol
- in the object file is not common, we don't want
- the object file: it is providing a definition for
- a symbol that we already have a definition for
- (this is the else condition below). */
- if (bfd_is_com_section (p->section))
- {
-
- /* If the symbol in the table is a constructor, we won't to
- anything fancy with it */
- if ((sp->flags & SYM_CONSTRUCTOR) == 0)
- {
- /* This libary member has something to
- say about this element. We should
- remember if its a new size */
- /* Move something from the ref list to the com list */
- if (sp->scoms_chain)
- {
- /* Already a common symbol, maybe update it */
- if (p->value > (*(sp->scoms_chain))->value)
- {
- (*(sp->scoms_chain))->value = p->value;
- }
- }
- else
- {
- /* Take a value from the ref chain
- Here we are moving a symbol from the owning bfd
- to another bfd. We must set up the
- common_section portion of the bfd thing */
-
-
-
- sp->scoms_chain = sp->srefs_chain;
- sp->srefs_chain =
- (asymbol **) ((*(sp->srefs_chain))->udata);
- (*(sp->scoms_chain))->udata = (PTR) NULL;
-
- (*(sp->scoms_chain))->section = p->section;
- (*(sp->scoms_chain))->flags = 0;
- /* Remember the size of this item */
- sp->scoms_chain[0]->value = p->value;
- commons_pending++;
- undefined_global_sym_count--;
- }
- {
- asymbol *com = *(sp->scoms_chain);
-
- if (((lang_input_statement_type *)
- (bfd_asymbol_bfd (com)->usrdata))->common_section ==
- (asection *) NULL)
- {
- ((lang_input_statement_type *)
- (bfd_asymbol_bfd (com)->usrdata))->common_section =
- bfd_make_section_old_way (bfd_asymbol_bfd (com), "COMMON");
- }
- }
- }
- ASSERT (p->udata == 0);
- }
- else if (sp->scoms_chain == (asymbol **) NULL)
- {
- if (write_map)
- {
- info ("%I needed due to %s\n", entry, sp->name);
- }
- return true;
- }
- }
- }
- }
- }
+static bfd_boolean
+reloc_dangerous (struct bfd_link_info *info ATTRIBUTE_UNUSED,
+ const char *message,
+ bfd *abfd,
+ asection *section,
+ bfd_vma address)
+{
+ einfo (_("%X%H: dangerous relocation: %s\n"),
+ abfd, section, address, message);
+ return TRUE;
+}
- return false;
+/* This is called when a reloc is being generated attached to a symbol
+ that is not being output. */
+
+static bfd_boolean
+unattached_reloc (struct bfd_link_info *info ATTRIBUTE_UNUSED,
+ const char *name,
+ bfd *abfd,
+ asection *section,
+ bfd_vma address)
+{
+ einfo (_("%X%H: reloc refers to symbol `%T' which is not being output\n"),
+ abfd, section, address, name);
+ return TRUE;
}
-void
-add_ysym (text)
- char *text;
+/* 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, 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,
+ struct bfd_link_hash_entry *h,
+ bfd *abfd,
+ asection *section,
+ bfd_vma value,
+ flagword flags ATTRIBUTE_UNUSED,
+ const char *string ATTRIBUTE_UNUSED)
{
- ldsym_type *lookup = ldsym_get (text);
- lookup->flags |= SYM_Y;
- had_y = 1;
+ 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);
+ else
+ einfo ("%B: definition of %s\n", abfd, name);
+ }
+
+ if (command_line.cref || nocrossref_list != NULL)
+ add_cref (name, abfd, section, value);
+
+ return TRUE;
}
projects / deliverable / binutils-gdb.git / blobdiff