-/* Copyright (C) 1991 Free Software Foundation, Inc.
+/* Main program of GNU linker.
+ Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
+ Free Software Foundation, Inc.
This file is part of GLD, the Gnu Linker.
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. */
-
+along with GLD; see the file COPYING. If not, write to the Free
+Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+02111-1307, USA. */
#include "bfd.h"
#include "sysdep.h"
+#include <stdio.h>
+#include "safe-ctype.h"
+#include "libiberty.h"
+#include "progress.h"
+#include "bfdlink.h"
+#include "filenames.h"
-#include "config.h"
#include "ld.h"
-#include "ldsym.h"
#include "ldmain.h"
#include "ldmisc.h"
#include "ldwrite.h"
#include "ldgram.h"
#include "ldexp.h"
#include "ldlang.h"
-#include "ldemul.h"
#include "ldlex.h"
#include "ldfile.h"
-#include "ldindr.h"
-#include "ldwarn.h"
+#include "ldemul.h"
#include "ldctor.h"
-#include "lderror.h"
-/* 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>
+#ifdef HAVE_SBRK
+#ifdef NEED_DECLARATION_SBRK
+extern PTR sbrk ();
+#endif
+#endif
+
static char *get_emulation PARAMS ((int, char **));
static void set_scripts_dir PARAMS ((void));
/* Name this program was invoked by. */
char *program_name;
-/* The file that we're creating */
+/* The file that we're creating. */
bfd *output_bfd = 0;
-/* set if -y on the command line */
-int had_y;
-
-/* The local symbol prefix */
-char lprefix = 'L';
-
/* 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;
/* Nonzero means same, but note open failures, too. */
boolean trace_file_tries;
-/* 1 => write load map. */
-boolean write_map;
-
-#ifdef GNU960
-/* Indicates whether output file will be b.out (default) or coff */
-enum target_flavour output_flavor = BFD_BOUT_FORMAT;
-#endif
-
-/* A count of the total number of local symbols ever seen - by adding
- the symbol_count field of each newly read afile.*/
+/* Nonzero means version number was printed, so exit successfully
+ instead of complaining if no input files are given. */
+boolean version_printed;
-unsigned int total_symbols_seen;
+/* Nonzero means link in every member of an archive. */
+boolean whole_archive;
-/* 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. */
+boolean demangling;
args_type command_line;
ld_config_type config;
+
+static void remove_output PARAMS ((void));
+static boolean check_for_scripts_dir PARAMS ((char *dir));
+static boolean add_archive_element PARAMS ((struct bfd_link_info *, bfd *,
+ const char *));
+static boolean multiple_definition PARAMS ((struct bfd_link_info *,
+ const char *,
+ bfd *, asection *, bfd_vma,
+ bfd *, asection *, bfd_vma));
+static boolean multiple_common PARAMS ((struct bfd_link_info *,
+ const char *, bfd *,
+ enum bfd_link_hash_type, bfd_vma,
+ bfd *, enum bfd_link_hash_type,
+ bfd_vma));
+static boolean add_to_set PARAMS ((struct bfd_link_info *,
+ struct bfd_link_hash_entry *,
+ bfd_reloc_code_real_type,
+ bfd *, asection *, bfd_vma));
+static boolean constructor_callback PARAMS ((struct bfd_link_info *,
+ boolean constructor,
+ const char *name,
+ bfd *, asection *, bfd_vma));
+static boolean warning_callback PARAMS ((struct bfd_link_info *,
+ const char *, const char *, bfd *,
+ asection *, bfd_vma));
+static void warning_find_reloc PARAMS ((bfd *, asection *, PTR));
+static boolean undefined_symbol PARAMS ((struct bfd_link_info *,
+ const char *, bfd *,
+ asection *, bfd_vma, boolean));
+static boolean reloc_overflow PARAMS ((struct bfd_link_info *, const char *,
+ const char *, bfd_vma,
+ bfd *, asection *, bfd_vma));
+static boolean reloc_dangerous PARAMS ((struct bfd_link_info *, const char *,
+ bfd *, asection *, bfd_vma));
+static boolean unattached_reloc PARAMS ((struct bfd_link_info *,
+ const char *, bfd *, asection *,
+ bfd_vma));
+static boolean notice PARAMS ((struct bfd_link_info *, const char *,
+ bfd *, asection *, bfd_vma));
+
+static struct bfd_link_callbacks link_callbacks = {
+ add_archive_element,
+ multiple_definition,
+ multiple_common,
+ add_to_set,
+ constructor_callback,
+ warning_callback,
+ undefined_symbol,
+ reloc_overflow,
+ reloc_dangerous,
+ unattached_reloc,
+ notice
+};
+
+struct bfd_link_info link_info;
\f
-void
+static void
+remove_output ()
+{
+ if (output_filename)
+ {
+ if (output_bfd && output_bfd->iostream)
+ fclose ((FILE *) (output_bfd->iostream));
+ if (delete_output_file_on_failure)
+ unlink (output_filename);
+ }
+}
+
+int
main (argc, argv)
- char **argv;
int argc;
+ char **argv;
{
char *emulation;
+ long start_time = get_run_time ();
+
+#if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
+ setlocale (LC_MESSAGES, "");
+#endif
+#if defined (HAVE_SETLOCALE)
+ setlocale (LC_CTYPE, "");
+#endif
+ bindtextdomain (PACKAGE, LOCALEDIR);
+ textdomain (PACKAGE);
program_name = argv[0];
+ xmalloc_set_program_name (program_name);
+
+ START_PROGRESS (program_name, 0);
bfd_init ();
- /* Initialize the data about options. */
+ bfd_set_error_program_name (program_name);
+ xatexit (remove_output);
- trace_files = trace_file_tries = false;
- write_map = false;
- config.relocateable_output = false;
+ /* Set the default BFD target based on the configured target. Doing
+ this permits the linker to be configured for a particular target,
+ and linked against a shared BFD library which was configured for
+ a different target. The macro TARGET is defined by Makefile. */
+ if (! bfd_set_default_target (TARGET))
+ {
+ einfo (_("%X%P: can't set BFD default target to `%s': %E\n"), TARGET);
+ xexit (1);
+ }
+
+#if YYDEBUG
+ {
+ extern int yydebug;
+ yydebug = 1;
+ }
+#endif
+
+ /* Initialize the data about options. */
+ trace_files = trace_file_tries = version_printed = false;
+ whole_archive = false;
+ config.build_constructors = true;
+ config.dynamic_link = false;
+ config.has_shared = false;
+ config.split_by_reloc = (unsigned) -1;
+ config.split_by_file = (bfd_size_type) -1;
command_line.force_common_definition = false;
+ command_line.inhibit_common_definition = false;
+ command_line.interpreter = NULL;
+ command_line.rpath = NULL;
+ command_line.warn_mismatch = true;
+ command_line.check_section_addresses = true;
+
+ /* We initialize DEMANGLING based on the environment variable
+ COLLECT_NO_DEMANGLE. The gcc collect2 program will demangle the
+ output of the linker, unless COLLECT_NO_DEMANGLE is set in the
+ environment. Acting the same way here lets us provide the same
+ interface by default. */
+ demangling = getenv ("COLLECT_NO_DEMANGLE") == NULL;
+
+ link_info.callbacks = &link_callbacks;
+ link_info.relocateable = false;
+ link_info.emitrelocations = false;
+ link_info.shared = false;
+ link_info.symbolic = false;
+ link_info.export_dynamic = false;
+ link_info.static_link = false;
+ link_info.traditional_format = false;
+ link_info.optimize = false;
+ link_info.no_undefined = false;
+ link_info.allow_shlib_undefined = false;
+ link_info.strip = strip_none;
+ link_info.discard = discard_sec_merge;
+ link_info.keep_memory = true;
+ link_info.input_bfds = NULL;
+ link_info.create_object_symbols_section = NULL;
+ link_info.hash = NULL;
+ link_info.keep_hash = NULL;
+ link_info.notice_all = false;
+ link_info.notice_hash = NULL;
+ link_info.wrap_hash = NULL;
+ link_info.mpc860c0 = 0;
+ /* SVR4 linkers seem to set DT_INIT and DT_FINI based on magic _init
+ and _fini symbols. We are compatible. */
+ link_info.init_function = "_init";
+ link_info.fini_function = "_fini";
+ link_info.new_dtags = false;
+ link_info.flags = (bfd_vma) 0;
+ link_info.flags_1 = (bfd_vma) 0;
+ link_info.pei386_auto_import = false;
+ link_info.combreloc = false;
+ link_info.spare_dynamic_tags = 5;
- init_bfd_error_vector ();
- ldsym_init ();
ldfile_add_arch ("");
config.make_executable = true;
force_make_executable = false;
-
- /* Initialize the cumulative counts of symbols. */
- undefined_global_sym_count = 0;
- multiple_def_count = 0;
- commons_pending = 0;
-
config.magic_demand_paged = true;
config.text_read_only = true;
- config.make_executable = true;
emulation = get_emulation (argc, argv);
ldemul_choose_mode (emulation);
- default_target = ldemul_choose_target ();
+ default_target = ldemul_choose_target (argc, argv);
lang_init ();
ldemul_before_parse ();
lang_has_input_file = false;
parse_args (argc, argv);
+ ldemul_set_symbols ();
+
+ if (link_info.relocateable)
+ {
+ if (command_line.gc_sections)
+ einfo ("%P%F: --gc-sections and -r may not be used together\n");
+ if (link_info.mpc860c0)
+ einfo (_("%P%F: -r and --mpc860c0 may not be used together\n"));
+ else if (command_line.relax)
+ einfo (_("%P%F: --relax and -r may not be used together\n"));
+ if (link_info.shared)
+ einfo (_("%P%F: -r and -shared may not be used together\n"));
+ }
+
+ if (! link_info.shared)
+ {
+ if (command_line.filter_shlib)
+ einfo (_("%P%F: -F may not be used without -shared\n"));
+ if (command_line.auxiliary_filters)
+ einfo (_("%P%F: -f may not be used without -shared\n"));
+ }
+
+ /* Treat ld -r -s as ld -r -S -x (i.e., strip all local symbols). I
+ don't see how else this can be handled, since in this case we
+ must preserve all externally visible symbols. */
+ if (link_info.relocateable && link_info.strip == strip_all)
+ {
+ link_info.strip = strip_debugger;
+ if (link_info.discard == discard_sec_merge)
+ link_info.discard = discard_all;
+ }
+
/* This essentially adds another -L directory so this must be done after
the -L's in argv have been processed. */
set_scripts_dir ();
- if (had_script == false)
+ /* If we have not already opened and parsed a linker script
+ read the emulation's appropriate default script. */
+ if (saved_script_handle == NULL)
{
- /* Read the emulation's appropriate default script. */
int isfile;
- char *s = ldemul_get_script (&isfile);
+ char *s = ldemul_get_script (& isfile);
if (isfile)
+ ldfile_open_command_file (s);
+ else
+ {
+ lex_string = s;
+ lex_redirect (s);
+ }
+ parser_input = input_script;
+ yyparse ();
+ lex_string = NULL;
+ }
+
+ if (trace_file_tries)
+ {
+ info_msg (_("using %s linker script:\n"),
+ saved_script_handle ? "external" : "internal");
+ info_msg ("==================================================\n");
+
+ if (saved_script_handle)
{
- /* sizeof counts the terminating NUL. */
- size_t size = strlen (s) + sizeof ("-T ");
- char *buf = (char *) ldmalloc(size);
- sprintf (buf, "-T %s", s);
- parse_line (buf, 0);
+ static const int ld_bufsz = 8193;
+ size_t n;
+ char *buf = xmalloc (ld_bufsz);
+
+ rewind (saved_script_handle);
+ while ((n = fread (buf, 1, ld_bufsz - 1, saved_script_handle)) > 0)
+ {
+ buf [n] = 0;
+ info_msg (buf);
+ }
+ rewind (saved_script_handle);
free (buf);
}
else
- parse_line (s, 1);
- }
+ {
+ int isfile;
- if (config.relocateable_output && command_line.relax)
- {
- einfo ("%P%F: -relax and -r may not be used together\n");
+ info_msg (ldemul_get_script (& isfile));
+ }
+
+ info_msg ("\n==================================================\n");
}
+
lang_final ();
if (lang_has_input_file == false)
{
- einfo ("%P%F: no input files\n");
+ if (version_printed)
+ xexit (0);
+ einfo (_("%P%F: no input files\n"));
}
if (trace_files)
{
- info_msg ("%P: mode %s\n", emulation);
+ info_msg (_("%P: mode %s\n"), emulation);
}
ldemul_after_parse ();
-
if (config.map_filename)
{
if (strcmp (config.map_filename, "-") == 0)
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 (config.text_read_only)
+ if (! link_info.relocateable)
{
- /* Look for a text section and mark the readonly attribute in it */
+ /* Look for a text section and switch the readonly attribute in it. */
asection *found = bfd_get_section_by_name (output_bfd, ".text");
if (found != (asection *) NULL)
{
- found->flags |= SEC_READONLY;
+ if (config.text_read_only)
+ found->flags |= SEC_READONLY;
+ else
+ found->flags &= ~SEC_READONLY;
}
}
- if (config.relocateable_output)
+ if (link_info.relocateable)
output_bfd->flags &= ~EXEC_P;
else
output_bfd->flags |= EXEC_P;
ldwrite ();
+ if (config.map_file != NULL)
+ lang_map ();
+ if (command_line.cref)
+ output_cref (config.map_file != NULL ? config.map_file : stdout);
+ if (nocrossref_list != NULL)
+ check_nocrossrefs ();
+
/* Even if we're producing relocateable output, some non-fatal errors should
be reported in the exit status. (What non-fatal errors, if any, do we
want to ignore for relocateable output?) */
{
if (trace_files == true)
{
- einfo ("%P: link errors found, deleting executable `%s'\n",
+ einfo (_("%P: link errors found, deleting executable `%s'\n"),
output_filename);
}
- if (output_bfd->iostream)
- fclose ((FILE *) (output_bfd->iostream));
+ /* The file will be removed by remove_output. */
- unlink (output_filename);
- exit (1);
+ xexit (1);
}
else
{
- bfd_close (output_bfd);
+ if (! bfd_close (output_bfd))
+ einfo (_("%F%B: final close failed: %E\n"), output_bfd);
+
+ /* If the --force-exe-suffix is enabled, and we're making an
+ executable file and it doesn't end in .exe, copy it to one
+ which does. */
+ if (! link_info.relocateable && command_line.force_exe_suffix)
+ {
+ int len = strlen (output_filename);
+ if (len < 4
+ || (strcasecmp (output_filename + len - 4, ".exe") != 0
+ && strcasecmp (output_filename + len - 4, ".dll") != 0))
+ {
+ FILE *src;
+ FILE *dst;
+ const int bsize = 4096;
+ char *buf = xmalloc (bsize);
+ int l;
+ char *dst_name = xmalloc (len + 5);
+ strcpy (dst_name, output_filename);
+ strcat (dst_name, ".exe");
+ src = fopen (output_filename, FOPEN_RB);
+ dst = fopen (dst_name, FOPEN_WB);
+
+ if (!src)
+ einfo (_("%X%P: unable to open for source of copy `%s'\n"), output_filename);
+ if (!dst)
+ einfo (_("%X%P: unable to open for destination of copy `%s'\n"), dst_name);
+ while ((l = fread (buf, 1, bsize, src)) > 0)
+ {
+ int done = fwrite (buf, 1, l, dst);
+ if (done != l)
+ {
+ einfo (_("%P: Error writing file `%s'\n"), dst_name);
+ }
+ }
+ fclose (src);
+ if (fclose (dst) == EOF)
+ {
+ einfo (_("%P: Error closing file `%s'\n"), dst_name);
+ }
+ free (dst_name);
+ free (buf);
+ }
+ }
+ }
+
+ END_PROGRESS (program_name);
+
+ if (config.stats)
+ {
+#ifdef HAVE_SBRK
+ char *lim = (char *) sbrk (0);
+#endif
+ long run_time = get_run_time () - start_time;
+
+ fprintf (stderr, _("%s: total time in link: %ld.%06ld\n"),
+ program_name, run_time / 1000000, run_time % 1000000);
+#ifdef HAVE_SBRK
+ fprintf (stderr, _("%s: data size %ld\n"), program_name,
+ (long) (lim - (char *) &environ));
+#endif
}
- exit (0);
+ /* Prevent remove_output from doing anything, after a successful link. */
+ output_filename = NULL;
+
+ xexit (0);
+ return 0;
}
/* We need to find any explicitly given emulation in order to initialize the
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++)
{
}
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], "-mips3") == 0
+ || strcmp (argv[i], "-mips32") == 0
+ || strcmp (argv[i], "-mips64") == 0
+ || strcmp (argv[i], "-mips4") == 0
+ || strcmp (argv[i], "-mips5") == 0)
{
- /* FIXME: The arguments -mips1, -mips2 and -mips3 are
+ /* 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
the arguments and hope that nobody ever creates
emulations named ips1, ips2 or ips3. */
}
+ else if (strcmp (argv[i], "-m486") == 0)
+ {
+ /* FIXME: The argument -m486 is passed to the linker on
+ some Linux systems. Hope that nobody creates an
+ emulation named 486. */
+ }
else
{
/* -mEMUL */
dirlen = strlen (dir);
/* sizeof counts the terminating NUL. */
- buf = (char *) ldmalloc (dirlen + sizeof("/ldscripts"));
+ buf = (char *) xmalloc (dirlen + sizeof ("/ldscripts"));
sprintf (buf, "%s/ldscripts", dir);
res = stat (buf, &s) == 0 && S_ISDIR (s.st_mode);
free (buf);
if (res)
- ldfile_add_library_path (dir);
+ ldfile_add_library_path (dir, false);
return res;
}
size_t dirlen;
if (check_for_scripts_dir (SCRIPTDIR))
- return; /* We've been installed normally. */
+ /* We've been installed normally. */
+ return;
/* 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
+#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)
{
- dirlen = 1;
- dir = (char *) ldmalloc (dirlen + 8);
- strcpy (dir, ".");
+ /* Don't look for ldscripts in the current directory. There is
+ too much potential for confusion. */
+ return;
}
+ dirlen = end - program_name;
+ /* Make a copy of program_name in dir.
+ Leave room for later "/../lib". */
+ dir = (char *) xmalloc (dirlen + 8);
+ strncpy (dir, program_name, dirlen);
+ dir[dirlen] = '\0';
+
if (check_for_scripts_dir (dir))
- return; /* Don't free dir. */
+ /* Don't free dir. */
+ return;
/* Look for "ldscripts" in <the dir where our binary is>/../lib. */
strcpy (dir + dirlen, "/../lib");
if (check_for_scripts_dir (dir))
return;
- free (dir); /* Well, we tried. */
+ /* Well, we tried. */
+ free (dir);
}
void
-read_entry_symbols (desc, entry)
- bfd *desc;
- struct lang_input_statement_struct *entry;
+add_ysym (name)
+ const char *name;
{
- if (entry->asymbols == (asymbol **) NULL)
+ if (link_info.notice_hash == (struct bfd_hash_table *) 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.notice_hash = ((struct bfd_hash_table *)
+ xmalloc (sizeof (struct bfd_hash_table)));
+ if (! bfd_hash_table_init_n (link_info.notice_hash,
+ bfd_hash_newfunc,
+ 61))
+ einfo (_("%P%F: bfd_hash_table_init failed: %E\n"));
}
+
+ if (bfd_hash_lookup (link_info.notice_hash, name, true, true)
+ == (struct bfd_hash_entry *) NULL)
+ einfo (_("%P%F: bfd_hash_lookup failed: %E\n"));
}
-/*
- * turn this item into a reference
- */
+/* Record a symbol to be wrapped, from the --wrap option. */
+
void
-refize (sp, nlist_p)
- ldsym_type *sp;
- asymbol **nlist_p;
+add_wrap (name)
+ const char *name;
{
- asymbol *sym = *nlist_p;
-
- sym->value = 0;
-
- /* FIXME: Why do we clear the flags here? This used to set the
- flags to zero, but we must not clear BSF_WEAK. */
- sym->flags &= BSF_WEAK;
-
- sym->section = &bfd_und_section;
- sym->udata = (PTR) (sp->srefs_chain);
- sp->srefs_chain = nlist_p;
+ if (link_info.wrap_hash == NULL)
+ {
+ link_info.wrap_hash = ((struct bfd_hash_table *)
+ xmalloc (sizeof (struct bfd_hash_table)));
+ if (! bfd_hash_table_init_n (link_info.wrap_hash,
+ bfd_hash_newfunc,
+ 61))
+ einfo (_("%P%F: bfd_hash_table_init failed: %E\n"));
+ }
+ if (bfd_hash_lookup (link_info.wrap_hash, name, true, true) == NULL)
+ einfo (_("%P%F: bfd_hash_lookup failed: %E\n"));
}
-/*
-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 (filename)
+ const char *filename;
{
- asymbol *sym = *nlist_p;
- ldsym_type *sp;
-
- /* Lookup the name from the incoming bfd's symbol table in the
- linker's global symbol table */
-
-
- flagword this_symbol_flags = sym->flags;
-
- sp = ldsym_get (name);
-
-
- /* If this symbol already has udata, it means that something strange
- has happened.
+ FILE *file;
+ char *buf;
+ size_t bufsize;
+ int c;
- 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 (link_info.strip == strip_some)
+ einfo (_("%X%P: error: duplicate retain-symbols-file\n"));
+ file = fopen (filename, "r");
+ if (file == (FILE *) NULL)
+ {
+ bfd_set_error (bfd_error_system_call);
+ einfo ("%X%P: %s: %E\n", filename);
+ return;
+ }
- if (sym->udata)
- return;
+ link_info.keep_hash = ((struct bfd_hash_table *)
+ xmalloc (sizeof (struct bfd_hash_table)));
+ if (! bfd_hash_table_init (link_info.keep_hash, bfd_hash_newfunc))
+ einfo (_("%P%F: bfd_hash_table_init failed: %E\n"));
+ bufsize = 100;
+ buf = (char *) xmalloc (bufsize);
- if (this_symbol_flags & BSF_CONSTRUCTOR)
+ c = getc (file);
+ while (c != EOF)
{
- /* Add this constructor to the list we keep */
- ldlang_add_constructor (sp);
- /* Turn any commons into refs */
- if (sp->scoms_chain != (asymbol **) NULL)
- {
- refize (sp, sp->scoms_chain);
- sp->scoms_chain = 0;
- }
- }
- else if ((sym->flags & BSF_WEAK) != 0
- && (sp->sdefs_chain != NULL || sp->scoms_chain != NULL))
- {
- /* SYM is a weak symbol for which we already have a definition.
- Just ignore it. The UnixWare linker is order dependent: if a
- global symbol follows a weak symbol it gives an error; if a
- weak symbol follows a global symbol it does not. We are
- compatible. */
- }
- else
- {
- if (bfd_is_com_section (sym->section))
+ while (ISSPACE (c))
+ c = getc (file);
+
+ if (c != EOF)
{
- /* 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 */
- if (config.warn_common)
- multiple_warn("%C: warning: common of `%s' overridden by definition\n",
- sym,
- "%C: warning: defined here\n",
- *(sp->sdefs_chain));
- refize (sp, nlist_p);
- }
- else if (sp->scoms_chain)
+ size_t len = 0;
+
+ while (! ISSPACE (c) && c != EOF)
{
- /* If we have a previous common, keep only the biggest */
- if ((*(sp->scoms_chain))->value > sym->value)
+ buf[len] = c;
+ ++len;
+ if (len >= bufsize)
{
- /* other common is bigger, throw this one away */
- if (config.warn_common)
- multiple_warn("%C: warning: common of `%s' overridden by larger common\n",
- sym,
- "%C: warning: larger common is here\n",
- *(sp->scoms_chain));
- refize (sp, nlist_p);
- }
- else if (sp->scoms_chain != nlist_p)
- {
- /* other common is smaller, throw that away */
- if (config.warn_common)
- {
- if ((*(sp->scoms_chain))->value < sym->value)
- multiple_warn("%C: warning: common of `%s' overriding smaller common\n",
- sym,
- "%C: warning: smaller common is here\n",
- *(sp->scoms_chain));
- else
- multiple_warn("%C: warning: multiple common of `%s'\n",
- sym,
- "%C: warning: previous common is here\n",
- *(sp->scoms_chain));
- }
- refize (sp, sp->scoms_chain);
- sp->scoms_chain = nlist_p;
+ bufsize *= 2;
+ buf = xrealloc (buf, bufsize);
}
+ c = getc (file);
}
- 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;
- }
- }
- }
- else if (sym->section != &bfd_und_section)
- {
- /* This is the definition of a symbol, add to def chain */
- if (sp->sdefs_chain && (*(sp->sdefs_chain))->section != sym->section)
- {
- multiple_warn("%X%C: multiple definition of `%s'\n",
- sym,
- "%X%C: first defined here\n",
- *(sp->sdefs_chain));
- multiple_def_count++;
- }
- else
- {
- sym->udata = (PTR) (sp->sdefs_chain);
- sp->sdefs_chain = nlist_p;
- }
+ buf[len] = '\0';
- /* A definition overrides a common symbol */
- if (sp->scoms_chain != NULL)
- {
- if (config.warn_common)
- multiple_warn("%C: warning: definition of `%s' overriding common\n",
- sym,
- "%C: warning: common is here\n",
- *(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--;
- }
- }
- 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);
+ if (bfd_hash_lookup (link_info.keep_hash, buf, true, true)
+ == (struct bfd_hash_entry *) NULL)
+ einfo (_("%P%F: bfd_hash_lookup for insertion failed: %E\n"));
}
}
- ASSERT (sp->sdefs_chain == 0 || sp->scoms_chain == 0);
- ASSERT (sp->scoms_chain == 0 || (*(sp->scoms_chain))->udata == 0);
-}
-
-static void
-enter_file_symbols (entry)
- lang_input_statement_type *entry;
-{
- asymbol **q;
+ if (link_info.strip != strip_none)
+ einfo (_("%P: `-retain-symbols-file' overrides `-s' and `-S'\n"));
- entry->common_section =
- bfd_make_section_old_way (entry->the_bfd, "COMMON");
- entry->common_section->flags = SEC_NEVER_LOAD;
- ldlang_add_file (entry);
+ 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 (trace_files || trace_file_tries)
- {
- info_msg ("%I\n", entry);
- }
-
- total_symbols_seen += entry->symbol_count;
- total_files_seen++;
- if (entry->symbol_count)
+static boolean
+add_archive_element (info, abfd, name)
+ struct bfd_link_info *info ATTRIBUTE_UNUSED;
+ bfd *abfd;
+ const char *name;
+{
+ lang_input_statement_type *input;
+
+ input = ((lang_input_statement_type *)
+ xmalloc (sizeof (lang_input_statement_type)));
+ input->filename = abfd->filename;
+ input->local_sym_name = abfd->filename;
+ input->the_bfd = abfd;
+ input->asymbols = NULL;
+ input->next = NULL;
+ input->just_syms_flag = false;
+ input->loaded = false;
+ input->search_dirs_flag = false;
+
+ /* FIXME: The following fields are not set: header.next,
+ header.type, closed, passive_position, symbol_count,
+ next_real_file, is_archive, target, real. This bit of code is
+ from the old decode_library_subfile function. I don't know
+ whether any of those fields matters. */
+
+ ldlang_add_file (input);
+
+ if (config.map_file != (FILE *) NULL)
{
- for (q = entry->asymbols; *q; q++)
- {
- asymbol *p = *q;
+ static boolean header_printed;
+ struct bfd_link_hash_entry *h;
+ bfd *from;
+ int len;
- 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);
- }
- }
+ h = bfd_link_hash_lookup (link_info.hash, name, false, false, true);
- if (p->section == &bfd_ind_section
- || (p->flags & BSF_INDIRECT) != 0)
- {
- add_indirect (q);
- }
- else if (p->flags & BSF_WARNING)
- {
- add_warning (p);
- }
- else if (bfd_is_com_section (p->section))
- {
- enter_global_ref (q, p->name);
-
- /* If this is not bfd_com_section, make sure we have a
- section of this name in the bfd. We need this
- because some targets that use multiple common
- sections do not actually put the common section in
- the BFD, but we need it there so that a wildcard
- specification in the linker script (e.g.,
- *(.scommon)) will find the section and attach it to
- the right output section. When an section is chosed
- for the common symbols (in lang_common) that section
- must have been correctly given an output section.
- For normal common symbols we just use
- entry->common_section, initialized above. */
- if (p->section != &bfd_com_section
- && p->section->owner != entry->the_bfd)
- bfd_make_section (entry->the_bfd,
- bfd_get_section_name (p->section->owner,
- p->section));
- }
- else if (p->section == &bfd_und_section
- || (p->flags & BSF_GLOBAL)
- || (p->flags & BSF_CONSTRUCTOR)
- || (p->flags & BSF_WEAK))
+ if (h == NULL)
+ from = NULL;
+ else
+ {
+ switch (h->type)
{
- enter_global_ref (q, p->name);
+ default:
+ from = NULL;
+ break;
+
+ case bfd_link_hash_defined:
+ case bfd_link_hash_defweak:
+ from = h->u.def.section->owner;
+ break;
+
+ case bfd_link_hash_undefined:
+ case bfd_link_hash_undefweak:
+ from = h->u.undef.abfd;
+ break;
+
+ case bfd_link_hash_common:
+ from = h->u.c.p->section->owner;
+ break;
}
}
- }
-}
+ if (! header_printed)
+ {
+ char buf[100];
-/* Searching libraries */
-
-struct lang_input_statement_struct *decode_library_subfile ();
-void linear_library (), symdef_library ();
+ sprintf (buf, "%-29s %s\n\n", _("Archive member included"),
+ _("because of file (symbol)"));
+ minfo ("%s", buf);
+ header_printed = true;
+ }
-/* 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. */
+ if (bfd_my_archive (abfd) == NULL)
+ {
+ minfo ("%s", bfd_get_filename (abfd));
+ len = strlen (bfd_get_filename (abfd));
+ }
+ else
+ {
+ minfo ("%s(%s)", bfd_get_filename (bfd_my_archive (abfd)),
+ bfd_get_filename (abfd));
+ len = (strlen (bfd_get_filename (bfd_my_archive (abfd)))
+ + strlen (bfd_get_filename (abfd))
+ + 2);
+ }
-void
-search_library (entry)
- struct lang_input_statement_struct *entry;
-{
+ if (len >= 29)
+ {
+ print_nl ();
+ len = 0;
+ }
+ while (len < 30)
+ {
+ print_space ();
+ ++len;
+ }
- /* No need to load a library if no undefined symbols */
- if (!undefined_global_sym_count)
- return;
+ if (from != NULL)
+ minfo ("%B ", from);
+ if (h != NULL)
+ minfo ("(%T)\n", h->root.string);
+ else
+ minfo ("(%s)\n", name);
+ }
- if (bfd_has_map (entry->the_bfd))
- symdef_library (entry);
- else
- linear_library (entry);
+ if (trace_files || trace_file_tries)
+ info_msg ("%I\n", input);
+ return true;
}
-#ifdef GNU960
-static
- boolean
-gnu960_check_format (abfd, format)
- bfd *abfd;
- bfd_format format;
-{
- boolean retval;
+/* This is called when BFD has discovered a symbol which is defined
+ multiple times. */
- if ((bfd_check_format (abfd, format) == true)
- && (abfd->xvec->flavour == output_flavor))
+static boolean
+multiple_definition (info, name, obfd, osec, oval, nbfd, nsec, nval)
+ struct bfd_link_info *info ATTRIBUTE_UNUSED;
+ const char *name;
+ bfd *obfd;
+ asection *osec;
+ bfd_vma oval;
+ bfd *nbfd;
+ asection *nsec;
+ bfd_vma nval;
+{
+ /* If either section has the output_section field set to
+ bfd_abs_section_ptr, it means that the section is being
+ discarded, and this is not really a multiple definition at all.
+ FIXME: It would be cleaner to somehow ignore symbols defined in
+ sections which are being discarded. */
+ if ((osec->output_section != NULL
+ && ! bfd_is_abs_section (osec)
+ && bfd_is_abs_section (osec->output_section))
+ || (nsec->output_section != NULL
+ && ! bfd_is_abs_section (nsec)
+ && bfd_is_abs_section (nsec->output_section)))
+ return true;
+
+ einfo (_("%X%C: multiple definition of `%T'\n"),
+ nbfd, nsec, nval, name);
+ if (obfd != (bfd *) NULL)
+ einfo (_("%D: first defined here\n"), obfd, osec, oval);
+
+ if (command_line.relax)
{
- return true;
+ einfo (_("%P: Disabling relaxation: it will not work with multiple definitions\n"));
+ command_line.relax = 0;
}
-
- return false;
+ return true;
}
-#endif
+/* 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. */
-void
-ldmain_open_file_read_symbol (entry)
- struct lang_input_statement_struct *entry;
+static boolean
+multiple_common (info, name, obfd, otype, osize, nbfd, ntype, nsize)
+ struct bfd_link_info *info ATTRIBUTE_UNUSED;
+ const char *name;
+ bfd *obfd;
+ enum bfd_link_hash_type otype;
+ bfd_vma osize;
+ bfd *nbfd;
+ enum bfd_link_hash_type ntype;
+ bfd_vma nsize;
{
- if (entry->asymbols == (asymbol **) NULL
- && entry->real == true
- && entry->filename != (char *) NULL)
- {
- ldfile_open_file (entry);
+ if (! config.warn_common)
+ return true;
-
-#ifdef GNU960
- if (gnu960_check_format (entry->the_bfd, bfd_object))
-#else
- if (bfd_check_format (entry->the_bfd, bfd_object))
-#endif
+ if (ntype == bfd_link_hash_defined
+ || ntype == bfd_link_hash_defweak
+ || ntype == bfd_link_hash_indirect)
+ {
+ ASSERT (otype == bfd_link_hash_common);
+ einfo (_("%B: warning: definition of `%T' overriding common\n"),
+ nbfd, name);
+ if (obfd != NULL)
+ einfo (_("%B: warning: common is here\n"), obfd);
+ }
+ else if (otype == bfd_link_hash_defined
+ || otype == bfd_link_hash_defweak
+ || otype == bfd_link_hash_indirect)
+ {
+ ASSERT (ntype == bfd_link_hash_common);
+ einfo (_("%B: warning: common of `%T' overridden by definition\n"),
+ nbfd, name);
+ if (obfd != NULL)
+ einfo (_("%B: warning: defined here\n"), obfd);
+ }
+ else
+ {
+ ASSERT (otype == bfd_link_hash_common && ntype == bfd_link_hash_common);
+ if (osize > nsize)
{
- 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. */
+/* 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. */
-lang_input_statement_type *
-decode_library_subfile (library_entry, subfile_offset)
- struct lang_input_statement_struct *library_entry;
- bfd *subfile_offset;
+static boolean
+add_to_set (info, h, reloc, abfd, section, value)
+ struct bfd_link_info *info ATTRIBUTE_UNUSED;
+ struct bfd_link_hash_entry *h;
+ bfd_reloc_code_real_type reloc;
+ bfd *abfd;
+ asection *section;
+ bfd_vma value;
{
- 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, (const char *) 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 boolean
+constructor_callback (info, constructor, name, abfd, section, value)
+ struct bfd_link_info *info;
+ boolean constructor;
+ const char *name;
+ bfd *abfd;
+ asection *section;
+ bfd_vma value;
{
- 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 (output_bfd, BFD_RELOC_CTOR) == NULL
+ && (link_info.relocateable
+ || bfd_reloc_type_lookup (abfd, BFD_RELOC_CTOR) == NULL))
+ einfo (_("%P%F: BFD backend error: BFD_RELOC_CTOR unsupported\n"));
+
+ s = set_name;
+ if (bfd_get_symbol_leading_char (abfd) != '\0')
+ *s++ = bfd_get_symbol_leading_char (abfd);
+ if (constructor)
+ strcpy (s, "__CTOR_LIST__");
+ else
+ strcpy (s, "__DTOR_LIST__");
- 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. */
-{
- register struct lang_input_statement_struct *prev = 0;
+struct warning_callback_info {
+ boolean found;
+ const char *warning;
+ const char *symbol;
+ asymbol **asymbols;
+};
- boolean not_finished = true;
+/* This is called when there is a reference to a warning symbol. */
- while (not_finished == true)
+static boolean
+warning_callback (info, warning, symbol, abfd, section, address)
+ struct bfd_link_info *info ATTRIBUTE_UNUSED;
+ const char *warning;
+ const char *symbol;
+ bfd *abfd;
+ asection *section;
+ bfd_vma address;
+{
+ /* This is a hack to support warn_multiple_gp. FIXME: This should
+ have a cleaner interface, but what? */
+ if (! config.warn_multiple_gp
+ && strcmp (warning, "using multiple gp values") == 0)
+ return true;
+
+ if (section != NULL)
+ einfo ("%C: %s\n", abfd, section, address, warning);
+ else if (abfd == NULL)
+ einfo ("%P: %s\n", warning);
+ else if (symbol == NULL)
+ einfo ("%B: %s\n", abfd, warning);
+ else
{
- 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);
+ lang_input_statement_type *entry;
+ asymbol **asymbols;
+ struct warning_callback_info info;
- not_finished = false;
+ /* Look through the relocs to see if we can find a plausible
+ address. */
- while (idx != BFD_NO_MORE_SYMBOLS && undefined_global_sym_count)
+ entry = (lang_input_statement_type *) abfd->usrdata;
+ if (entry != NULL && entry->asymbols != NULL)
+ asymbols = entry->asymbols;
+ else
{
-
- if (exported_library_name->name)
+ long symsize;
+ long symbol_count;
+
+ symsize = bfd_get_symtab_upper_bound (abfd);
+ if (symsize < 0)
+ einfo (_("%B%F: could not read symbols: %E\n"), abfd);
+ asymbols = (asymbol **) xmalloc (symsize);
+ symbol_count = bfd_canonicalize_symtab (abfd, asymbols);
+ if (symbol_count < 0)
+ einfo (_("%B%F: could not read symbols: %E\n"), abfd);
+ if (entry != NULL)
{
+ entry->asymbols = asymbols;
+ entry->symbol_count = symbol_count;
+ }
+ }
- ldsym_type *sp = ldsym_get_soft (exported_library_name->name);
-
- /* 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)
- {
+ info.found = false;
+ info.warning = warning;
+ info.symbol = symbol;
+ info.asymbols = asymbols;
+ bfd_map_over_sections (abfd, warning_find_reloc, (PTR) &info);
- prev_archive_member_bfd = archive_member_bfd;
+ if (! info.found)
+ einfo ("%B: %s\n", abfd, warning);
- /* Read the symbol table of the archive member. */
+ if (entry == NULL)
+ free (asymbols);
+ }
- if (archive_member_bfd->usrdata != (PTR) NULL)
- {
+ return true;
+}
- archive_member_lang_input_statement_struct = (lang_input_statement_type *) archive_member_bfd->usrdata;
- }
- else
- {
+/* 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. */
- archive_member_lang_input_statement_struct =
- decode_library_subfile (entry, archive_member_bfd);
- archive_member_bfd->usrdata = (PTR) archive_member_lang_input_statement_struct;
+static void
+warning_find_reloc (abfd, sec, iarg)
+ bfd *abfd;
+ asection *sec;
+ PTR iarg;
+{
+ struct warning_callback_info *info = (struct warning_callback_info *) iarg;
+ long relsize;
+ arelent **relpp;
+ long relcount;
+ arelent **p, **pend;
- }
+ if (info->found)
+ return;
- if (archive_member_lang_input_statement_struct == 0)
- {
- einfo ("%F%I contains invalid archive member %s\n",
- entry, sp->name);
- }
+ 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;
- if (archive_member_lang_input_statement_struct->loaded == false)
- {
+ 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);
- read_entry_symbols (archive_member_bfd, archive_member_lang_input_statement_struct);
- /* Now scan the symbol table and decide whether to load. */
+ p = relpp;
+ pend = p + relcount;
+ for (; p < pend && *p != NULL; p++)
+ {
+ arelent *q = *p;
+ if (q->sym_ptr_ptr != NULL
+ && *q->sym_ptr_ptr != NULL
+ && strcmp (bfd_asymbol_name (*q->sym_ptr_ptr), info->symbol) == 0)
+ {
+ /* We found a reloc for the symbol we are looking for. */
+ einfo ("%C: %s\n", abfd, sec, q->address, info->warning);
+ info->found = true;
+ break;
+ }
+ }
- if (subfile_wanted_p (archive_member_lang_input_statement_struct) == true)
+ free (relpp);
+}
- {
- /* This member is needed; load it.
- Since we are loading something on this pass,
- we must make another pass through the symdef data. */
+/* This is called when an undefined symbol is found. */
- not_finished = true;
+static boolean
+undefined_symbol (info, name, abfd, section, address, fatal)
+ struct bfd_link_info *info ATTRIBUTE_UNUSED;
+ const char *name;
+ bfd *abfd;
+ asection *section;
+ bfd_vma address;
+ boolean fatal ATTRIBUTE_UNUSED;
+{
+ static char *error_name;
+ static unsigned int error_count;
- enter_file_symbols (archive_member_lang_input_statement_struct);
+#define MAX_ERRORS_IN_A_ROW 5
- if (prev)
- prev->chain = archive_member_lang_input_statement_struct;
- else
- entry->subfiles = archive_member_lang_input_statement_struct;
+ if (config.warn_once)
+ {
+ static struct bfd_hash_table *hash;
+ /* Only warn once about a particular undefined symbol. */
- prev = archive_member_lang_input_statement_struct;
+ if (hash == NULL)
+ {
+ hash = ((struct bfd_hash_table *)
+ xmalloc (sizeof (struct bfd_hash_table)));
+ if (! bfd_hash_table_init (hash, bfd_hash_newfunc))
+ einfo (_("%F%P: bfd_hash_table_init failed: %E\n"));
+ }
+ if (bfd_hash_lookup (hash, name, false, false) != NULL)
+ return true;
- /* 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 != (char *) 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 != (char *) 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);
+ einfo (_("%C: undefined reference to `%T'\n"),
+ abfd, section, address, name);
+ if (fatal)
+ einfo ("%X");
}
- entry->complained = true;
-
+ else if (error_count == MAX_ERRORS_IN_A_ROW)
+ einfo (_("%D: more undefined references to `%T' follow\n"),
+ abfd, section, address, name);
}
- 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);
-
+ einfo (_("%B: undefined reference to `%T'\n"),
+ abfd, name);
+ if (fatal)
+ einfo ("%X");
}
-
+ else if (error_count == MAX_ERRORS_IN_A_ROW)
+ einfo (_("%B: more undefined references to `%T' follow\n"),
+ abfd, name);
}
+
+ return true;
}
-/* 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 */
+/* This is called when a reloc overflows. */
-boolean
-subfile_wanted_p (entry)
- struct lang_input_statement_struct *entry;
+static boolean
+reloc_overflow (info, name, reloc_name, addend, abfd, section, address)
+ struct bfd_link_info *info ATTRIBUTE_UNUSED;
+ const char *name;
+ const char *reloc_name;
+ bfd_vma addend;
+ bfd *abfd;
+ asection *section;
+ bfd_vma address;
{
- asymbol **q;
-
- if (entry->symbol_count == 0)
- return false;
-
- for (q = entry->asymbols; *q; q++)
- {
- asymbol *p = *q;
-
- /* If the symbol has an interesting definition, we could
- potentially want it. */
+ if (abfd == (bfd *) NULL)
+ einfo (_("%P%X: generated"));
+ else
+ einfo ("%X%C:", abfd, section, address);
+ einfo (_(" relocation truncated to fit: %s %T"), reloc_name, name);
+ if (addend != 0)
+ einfo ("+%v", addend);
+ einfo ("\n");
+ return true;
+}
- if (p->flags & BSF_INDIRECT)
- {
- /** add_indirect(q);*/
- }
+/* This is called when a dangerous relocation is made. */
- if (bfd_is_com_section (p->section)
- || (p->flags & BSF_GLOBAL)
- || (p->flags & BSF_INDIRECT)
- || (p->flags & BSF_WEAK))
- {
- register ldsym_type *sp = ldsym_get_soft (p->name);
+static boolean
+reloc_dangerous (info, message, abfd, section, address)
+ struct bfd_link_info *info ATTRIBUTE_UNUSED;
+ const char *message;
+ bfd *abfd;
+ asection *section;
+ bfd_vma address;
+{
+ if (abfd == (bfd *) NULL)
+ einfo (_("%P%X: generated"));
+ else
+ einfo ("%X%C:", abfd, section, address);
+ einfo (_("dangerous relocation: %s\n"), message);
+ return true;
+}
- /* If this symbol has not been hashed,
- we can't be looking for it. */
- if (sp != (ldsym_type *) NULL
- && sp->sdefs_chain == (asymbol **) NULL)
- {
- int check;
-
- /* A weak symbol is not considered to be a reference
- when pulling files out of an archive. An unresolved
- weak symbol winds up with a value of zero. See the
- SVR4 ABI, p. 4-27. */
- if (sp->scoms_chain != (asymbol **) NULL)
- check = 1;
- else if (sp->srefs_chain == (asymbol **) NULL)
- check = 0;
- else
- {
- asymbol **ptr;
+/* This is called when a reloc is being generated attached to a symbol
+ that is not being output. */
- check = 0;
- for (ptr = sp->srefs_chain;
- ptr != (asymbol **) NULL;
- ptr = (asymbol **) ((*ptr)->udata))
- {
- if (((*ptr)->flags & BSF_WEAK) == 0)
- {
- check = 1;
- break;
- }
- }
- }
+static boolean
+unattached_reloc (info, name, abfd, section, address)
+ struct bfd_link_info *info ATTRIBUTE_UNUSED;
+ const char *name;
+ bfd *abfd;
+ asection *section;
+ bfd_vma address;
+{
+ if (abfd == (bfd *) NULL)
+ einfo (_("%P%X: generated"));
+ else
+ einfo ("%X%C:", abfd, section, address);
+ einfo (_(" reloc refers to symbol `%T' which is not being output\n"), name);
+ return true;
+}
- if (check)
- {
- /* This is a symbol we are looking for. It is
- either common or not yet defined. 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))
- {
+/* 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. */
- /* 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");
- }
-
- /* If the symbol is not in the generic
- common section, we must make sure the
- BFD has a section to hang it on to. */
- if (com->section != &bfd_com_section
- && (com->section->owner
- != bfd_asymbol_bfd (com)))
- bfd_make_section
- (bfd_asymbol_bfd (com),
- bfd_get_section_name (bfd_asymbol_bfd (com),
- com->section));
- }
- }
- ASSERT (p->udata == 0);
- }
- else if (sp->scoms_chain == (asymbol **) NULL)
- {
- if (write_map)
- {
- info_msg ("%I needed due to %s\n", entry, sp->name);
- }
- return true;
- }
- }
- }
- }
+static boolean
+notice (info, name, abfd, section, value)
+ struct bfd_link_info *info;
+ const char *name;
+ bfd *abfd;
+ asection *section;
+ bfd_vma value;
+{
+ if (! info->notice_all
+ || (info->notice_hash != NULL
+ && bfd_hash_lookup (info->notice_hash, name, false, false) != NULL))
+ {
+ if (bfd_is_und_section (section))
+ einfo ("%B: reference to %s\n", abfd, name);
+ else
+ einfo ("%B: definition of %s\n", abfd, name);
}
- return false;
-}
+ if (command_line.cref || nocrossref_list != NULL)
+ add_cref (name, abfd, section, value);
-void
-add_ysym (text)
- char *text;
-{
- ldsym_type *lookup = ldsym_get (text);
- lookup->flags |= SYM_Y;
- had_y = 1;
+ return true;
}
projects / binutils.git / blobdiff