Beispiel #1
0
int
main (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);

  expandargv (&argc, &argv);

  bfd_init ();

  bfd_set_error_program_name (program_name);

  xatexit (ld_cleanup);

  /* Set up the sysroot directory.  */
  ld_sysroot = get_sysroot (argc, argv);
  if (*ld_sysroot)
    {
      if (*TARGET_SYSTEM_ROOT == 0)
	{
	  einfo ("%P%F: this linker was not configured to use sysroots\n");
	  ld_sysroot = "";
	}
      else
	ld_canon_sysroot = lrealpath (ld_sysroot);
    }
  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);
    }

#if YYDEBUG
  {
    extern int yydebug;
    yydebug = 1;
  }
#endif

  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 (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;
  parse_args (argc, argv);

  if (config.hash_table_size != 0)
    bfd_hash_set_default_size (config.hash_table_size);

  ldemul_set_symbols ();

  if (link_info.relocatable)
    {
      if (command_line.check_section_addresses < 0)
	command_line.check_section_addresses = 0;
      if (link_info.shared)
	einfo (_("%P%F: -r and -shared may not be used together\n"));
    }

  /* We may have -Bsymbolic, -Bsymbolic-functions, --dynamic-list-data,
     --dynamic-list-cpp-new, --dynamic-list-cpp-typeinfo and
     --dynamic-list FILE.  -Bsymbolic and -Bsymbolic-functions are
     for shared libraries.  -Bsymbolic overrides all others and vice
     versa.  */
  switch (command_line.symbolic)
    {
    case symbolic_unset:
      break;
    case symbolic:
      /* -Bsymbolic is for shared library only.  */
      if (link_info.shared)
	{
	  link_info.symbolic = TRUE;
	  /* Should we free the unused memory?  */
	  link_info.dynamic_list = NULL;
	  command_line.dynamic_list = dynamic_list_unset;
	}
      break;
    case symbolic_functions:
      /* -Bsymbolic-functions is for shared library only.  */
      if (link_info.shared)
	command_line.dynamic_list = dynamic_list_data;
      break;
    }

  switch (command_line.dynamic_list)
    {
    case dynamic_list_unset:
      break;
    case dynamic_list_data:
      link_info.dynamic_data = TRUE;
    case dynamic_list:
      link_info.dynamic = TRUE;
      break;
    }

  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"));
    }

  if (! link_info.shared || link_info.pie)
    link_info.executable = TRUE;

  /* Treat ld -r -s as ld -r -S -x (i.e., strip all local symbols).  I
     don't see how else this can be handled, since in this case we
     must preserve all externally visible symbols.  */
  if (link_info.relocatable && link_info.strip == strip_all)
    {
      link_info.strip = strip_debugger;
      if (link_info.discard == discard_sec_merge)
	link_info.discard = discard_all;
    }

  /* 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)
    {
      ldfile_open_command_file (command_line.default_script);
      parser_input = input_script;
      yyparse ();
    }

  /* If we have not already opened and parsed a linker script
     read the emulation's appropriate default script.  */
  if (saved_script_handle == NULL)
    {
      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;
    }

  if (trace_file_tries)
    {
      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");
    }

  lang_final ();

  if (!lang_has_input_file)
    {
      if (version_printed)
	xexit (0);
      einfo (_("%P%F: no input files\n"));
    }

  if (trace_files)
    info_msg (_("%P: mode %s\n"), emulation);

  ldemul_after_parse ();

  if (config.map_filename)
    {
      if (strcmp (config.map_filename, "-") == 0)
	{
	  config.map_file = stdout;
	}
      else
	{
	  config.map_file = fopen (config.map_filename, FOPEN_WT);
	  if (config.map_file == (FILE *) NULL)
	    {
	      bfd_set_error (bfd_error_system_call);
	      einfo (_("%P%F: cannot open map file %s: %E\n"),
		     config.map_filename);
	    }
	}
    }

  lang_process ();

  /* Print error messages for any missing symbols, for any warning
     symbols, and possibly multiple definitions.  */
  if (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 ();

  /* 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)
    {
      if (trace_files)
	einfo (_("%P: link errors found, deleting executable `%s'\n"),
	       output_filename);

      /* The file will be removed by remove_output.  */
      xexit (1);
    }
  else
    {
      if (! bfd_close (link_info.output_bfd))
	einfo (_("%F%B: final close failed: %E\n"), link_info.output_bfd);

      /* If the --force-exe-suffix is enabled, and we're making an
	 executable file and it doesn't end in .exe, copy it to one
	 which does.  */
      if (! link_info.relocatable && command_line.force_exe_suffix)
	{
	  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 = (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 (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;

      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);
    }

  /* Prevent remove_output from doing anything, after a successful link.  */
  output_filename = NULL;

  xexit (0);
  return 0;
}
Beispiel #2
0
int
main (int argc, char **argv)
{
  char *emulation;
  long start_time = get_run_time ();
#ifdef HAVE_SBRK
  char *start_sbrk = (char *) sbrk (0);
#endif

#if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
  setlocale (LC_MESSAGES, "");
#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);

  expandargv (&argc, &argv);

  bfd_init ();

  bfd_set_error_program_name (program_name);

  /* We want to notice and fail on those nasty BFD assertions which are
     likely to signal incorrect output being generated but otherwise may
     leave no trace.  */
  default_bfd_assert_handler = bfd_set_assert_handler (ld_bfd_assert_handler);

  xatexit (ld_cleanup);

  /* Set up the sysroot directory.  */
  ld_sysroot = get_sysroot (argc, argv);
  if (*ld_sysroot)
    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);
    }

#if YYDEBUG
  {
    extern int yydebug;
    yydebug = 1;
  }
#endif

  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;
  link_info.disable_target_specific_optimizations = -1;

  command_line.warn_mismatch = TRUE;
  command_line.warn_search_mismatch = TRUE;
  command_line.check_section_addresses = -1;

  /* We initialize DEMANGLING based on the environment variable
     COLLECT_NO_DEMANGLE.  The gcc collect2 program will demangle the
     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.extern_protected_data = -1;
  link_info.dynamic_undefined_weak = -1;
  link_info.pei386_auto_import = -1;
  link_info.spare_dynamic_tags = 5;
  link_info.path_separator = ':';
#ifdef DEFAULT_FLAG_COMPRESS_DEBUG
  link_info.compress_debug = COMPRESS_DEBUG_GABI_ZLIB;
#endif

  ldfile_add_arch ("");
  emulation = get_emulation (argc, argv);
  ldemul_choose_mode (emulation);
  default_target = ldemul_choose_target (argc, argv);
  config.maxpagesize = bfd_emul_get_maxpagesize (default_target);
  config.commonpagesize = bfd_emul_get_commonpagesize (default_target);
  lang_init ();
  ldexp_init ();
  ldemul_before_parse ();
  lang_has_input_file = FALSE;
  parse_args (argc, argv);

  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.  */
  plugin_load_plugins ();
#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)
    {
      ldfile_open_command_file (command_line.default_script);
      parser_input = input_script;
      yyparse ();
    }

  /* If we have not already opened and parsed a linker script
     read the emulation's appropriate default script.  */
  if (saved_script_handle == NULL)
    {
      int isfile;
      char *s = ldemul_get_script (&isfile);

      if (isfile)
	ldfile_open_default_command_file (s);
      else
	{
	  lex_string = s;
	  lex_redirect (s, _("built in linker script"), 1);
	}
      parser_input = input_script;
      yyparse ();
      lex_string = NULL;
    }

  if (verbose)
    {
      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 (command_line.print_output_format)
    info_msg ("%s\n", lang_get_output_target ());

  lang_final ();

  /* If the only command line argument has been -v or --version or --verbose
     then ignore any input files provided by linker scripts and exit now.
     We do not want to create an output file when the linker is just invoked
     to provide version information.  */
  if (argc == 2 && version_printed)
    xexit (0);

  if (!lang_has_input_file)
    {
      if (version_printed || command_line.print_output_format)
	xexit (0);
      einfo (_("%P%F: no input files\n"));
    }

  if (trace_files)
    info_msg (_("%P: mode %s\n"), emulation);

  ldemul_after_parse ();

  if (config.map_filename)
    {
      if (strcmp (config.map_filename, "-") == 0)
	{
	  config.map_file = stdout;
	}
      else
	{
	  config.map_file = fopen (config.map_filename, FOPEN_WT);
	  if (config.map_file == (FILE *) NULL)
	    {
	      bfd_set_error (bfd_error_system_call);
	      einfo (_("%P%F: cannot open map file %s: %E\n"),
		     config.map_filename);
	    }
	}
    }

  lang_process ();

  /* Print error messages for any missing symbols, for any warning
     symbols, and possibly multiple definitions.  */
  if (bfd_link_relocatable (&link_info))
    link_info.output_bfd->flags &= ~EXEC_P;
  else
    link_info.output_bfd->flags |= EXEC_P;

  if ((link_info.compress_debug & COMPRESS_DEBUG))
    {
      link_info.output_bfd->flags |= BFD_COMPRESS;
      if (link_info.compress_debug == COMPRESS_DEBUG_GABI_ZLIB)
	link_info.output_bfd->flags |= BFD_COMPRESS_GABI;
    }

  ldwrite ();

  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 ();
  if (command_line.print_memory_usage)
    lang_print_memory_usage ();
#if 0
  {
    struct bfd_link_hash_entry * h;

    h = bfd_link_hash_lookup (link_info.hash, "__image_base__", 0,0,1);
    fprintf (stderr, "lookup = %p val %lx\n", h, h ? h->u.def.value : 1);
  }
#endif
  ldexp_finish ();
  lang_finish ();

  /* Even if we're producing relocatable output, some non-fatal errors should
     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)
    {
      if (trace_files)
	einfo (_("%P: link errors found, deleting executable `%s'\n"),
	       output_filename);

      /* The file will be removed by ld_cleanup.  */
      xexit (1);
    }
  else
    {
      if (! bfd_close (link_info.output_bfd))
	einfo (_("%F%B: final close failed: %E\n"), link_info.output_bfd);

      /* If the --force-exe-suffix is enabled, and we're making an
	 executable file and it doesn't end in .exe, copy it to one
	 which does.  */
      if (!bfd_link_relocatable (&link_info)
	  && 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 = (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 (_("%P%F: unable to open for source of copy `%s'\n"),
		       output_filename);
	      if (!dst)
		einfo (_("%P%F: 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;

      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 - start_sbrk));
#endif
      fflush (stderr);
    }

  /* Prevent ld_cleanup from doing anything, after a successful link.  */
  output_filename = NULL;

  xexit (0);
  return 0;
}
Beispiel #3
0
void
parse_args (unsigned argc, char **argv)
{
  unsigned i;
  int is, il, irl;
  int ingroup = 0;
  char *default_dirlist = NULL;
  char *shortopts;
  struct option *longopts;
  struct option *really_longopts;
  int last_optind;
  enum report_method how_to_report_unresolved_symbols = RM_GENERATE_ERROR;

  shortopts = xmalloc (OPTION_COUNT * 3 + 2);
  longopts = xmalloc (sizeof (*longopts) * (OPTION_COUNT + 1));
  really_longopts = xmalloc (sizeof (*really_longopts) * (OPTION_COUNT + 1));

  /* Starting the short option string with '-' is for programs that
     expect options and other ARGV-elements in any order and that care about
     the ordering of the two.  We describe each non-option ARGV-element
     as if it were the argument of an option with character code 1.  */
  shortopts[0] = '-';
  is = 1;
  il = 0;
  irl = 0;
  for (i = 0; i < OPTION_COUNT; i++)
    {
      if (ld_options[i].shortopt != '\0')
	{
	  shortopts[is] = ld_options[i].shortopt;
	  ++is;
	  if (ld_options[i].opt.has_arg == required_argument
	      || ld_options[i].opt.has_arg == optional_argument)
	    {
	      shortopts[is] = ':';
	      ++is;
	      if (ld_options[i].opt.has_arg == optional_argument)
		{
		  shortopts[is] = ':';
		  ++is;
		}
	    }
	}
      if (ld_options[i].opt.name != NULL)
	{
	  if (ld_options[i].control == EXACTLY_TWO_DASHES)
	    {
	      really_longopts[irl] = ld_options[i].opt;
	      ++irl;
	    }
	  else
	    {
	      longopts[il] = ld_options[i].opt;
	      ++il;
	    }
	}
    }
  shortopts[is] = '\0';
  longopts[il].name = NULL;
  really_longopts[irl].name = NULL;

  ldemul_add_options (is, &shortopts, il, &longopts, irl, &really_longopts);

  /* The -G option is ambiguous on different platforms.  Sometimes it
     specifies the largest data size to put into the small data
     section.  Sometimes it is equivalent to --shared.  Unfortunately,
     the first form takes an argument, while the second does not.

     We need to permit the --shared form because on some platforms,
     such as Solaris, gcc -shared will pass -G to the linker.

     To permit either usage, we look through the argument list.  If we
     find -G not followed by a number, we change it into --shared.
     This will work for most normal cases.  */
  for (i = 1; i < argc; i++)
    if (strcmp (argv[i], "-G") == 0
	&& (i + 1 >= argc
	    || ! ISDIGIT (argv[i + 1][0])))
      argv[i] = (char *) "--shared";

  /* Because we permit long options to start with a single dash, and
     we have a --library option, and the -l option is conventionally
     used with an immediately following argument, we can have bad
     results if somebody tries to use -l with a library whose name
     happens to start with "ibrary", as in -li.  We avoid problems by
     simply turning -l into --library.  This means that users will
     have to use two dashes in order to use --library, which is OK
     since that's how it is documented.

     FIXME: It's possible that this problem can arise for other short
     options as well, although the user does always have the recourse
     of adding a space between the option and the argument.  */
  for (i = 1; i < argc; i++)
    {
      if (argv[i][0] == '-'
	  && argv[i][1] == 'l'
	  && argv[i][2] != '\0')
	{
	  char *n;

	  n = xmalloc (strlen (argv[i]) + 20);
	  sprintf (n, "--library=%s", argv[i] + 2);
	  argv[i] = n;
	}
    }

  last_optind = -1;
  while (1)
    {
      int longind;
      int optc;

      /* Using last_optind lets us avoid calling ldemul_parse_args
	 multiple times on a single option, which would lead to
	 confusion in the internal static variables maintained by
	 getopt.  This could otherwise happen for an argument like
	 -nx, in which the -n is parsed as a single option, and we
	 loop around to pick up the -x.  */
      if (optind != last_optind)
	if (ldemul_parse_args (argc, argv))
	  continue;

      /* getopt_long_only is like getopt_long, but '-' as well as '--'
	 can indicate a long option.  */
      opterr = 0;
      last_optind = optind;
      optc = getopt_long_only (argc, argv, shortopts, longopts, &longind);
      if (optc == '?')
	{
	  optind = last_optind;
	  optc = getopt_long (argc, argv, "-", really_longopts, &longind);
	}

      if (ldemul_handle_option (optc))
	continue;

      if (optc == -1)
	break;

      switch (optc)
	{
	case '?':
	  einfo (_("%P: unrecognized option '%s'\n"), argv[last_optind]);
	default:
	  einfo (_("%P%F: use the --help option for usage information\n"));

	case 1:			/* File name.  */
	  lang_add_input_file (optarg, lang_input_file_is_file_enum, NULL);
	  break;

	case OPTION_IGNORE:
	  break;
	case 'a':
	  /* For HP/UX compatibility.  Actually -a shared should mean
	     ``use only shared libraries'' but, then, we don't
	     currently support shared libraries on HP/UX anyhow.  */
	  if (strcmp (optarg, "archive") == 0)
	    config.dynamic_link = FALSE;
	  else if (strcmp (optarg, "shared") == 0
		   || strcmp (optarg, "default") == 0)
	    config.dynamic_link = TRUE;
	  else
	    einfo (_("%P%F: unrecognized -a option `%s'\n"), optarg);
	  break;
	case OPTION_ASSERT:
	  /* FIXME: We just ignore these, but we should handle them.  */
	  if (strcmp (optarg, "definitions") == 0)
	    ;
	  else if (strcmp (optarg, "nodefinitions") == 0)
	    ;
	  else if (strcmp (optarg, "nosymbolic") == 0)
	    ;
	  else if (strcmp (optarg, "pure-text") == 0)
	    ;
	  else
	    einfo (_("%P%F: unrecognized -assert option `%s'\n"), optarg);
	  break;
	case 'A':
	  ldfile_add_arch (optarg);
	  break;
	case 'b':
	  lang_add_target (optarg);
	  break;
	case 'c':
	  ldfile_open_command_file (optarg);
	  parser_input = input_mri_script;
	  yyparse ();
	  break;
	case OPTION_CALL_SHARED:
	  config.dynamic_link = TRUE;
	  break;
	case OPTION_NON_SHARED:
	  config.dynamic_link = FALSE;
	  break;
	case OPTION_CREF:
	  command_line.cref = TRUE;
	  link_info.notice_all = TRUE;
	  break;
	case 'd':
	  command_line.force_common_definition = TRUE;
	  break;
	case OPTION_DEFSYM:
	  lex_string = optarg;
	  lex_redirect (optarg);
	  parser_input = input_defsym;
	  parsing_defsym = 1;
	  yyparse ();
	  parsing_defsym = 0;
	  lex_string = NULL;
	  break;
	case OPTION_DEMANGLE:
	  demangling = TRUE;
	  if (optarg != NULL)
	    {
	      enum demangling_styles style;

	      style = cplus_demangle_name_to_style (optarg);
	      if (style == unknown_demangling)
		einfo (_("%F%P: unknown demangling style `%s'"),
		       optarg);

	      cplus_demangle_set_style (style);
	    }
	  break;
	case 'I':		/* Used on Solaris.  */
	case OPTION_DYNAMIC_LINKER:
	  command_line.interpreter = optarg;
	  break;
	case OPTION_EB:
	  command_line.endian = ENDIAN_BIG;
	  break;
	case OPTION_EL:
	  command_line.endian = ENDIAN_LITTLE;
	  break;
	case OPTION_EMBEDDED_RELOCS:
	  command_line.embedded_relocs = TRUE;
	  break;
	case OPTION_EXPORT_DYNAMIC:
	case 'E': /* HP/UX compatibility.  */
	  link_info.export_dynamic = TRUE;
	  break;
	case 'e':
	  lang_add_entry (optarg, TRUE);
	  break;
	case 'f':
	  if (command_line.auxiliary_filters == NULL)
	    {
	      command_line.auxiliary_filters = xmalloc (2 * sizeof (char *));
	      command_line.auxiliary_filters[0] = optarg;
	      command_line.auxiliary_filters[1] = NULL;
	    }
	  else
	    {
	      int c;
	      char **p;

	      c = 0;
	      for (p = command_line.auxiliary_filters; *p != NULL; p++)
		++c;
	      command_line.auxiliary_filters
		= xrealloc (command_line.auxiliary_filters,
			    (c + 2) * sizeof (char *));
	      command_line.auxiliary_filters[c] = optarg;
	      command_line.auxiliary_filters[c + 1] = NULL;
	    }
	  break;
	case 'F':
	  command_line.filter_shlib = optarg;
	  break;
	case OPTION_FORCE_EXE_SUFFIX:
	  command_line.force_exe_suffix = TRUE;
	  break;
	case 'G':
	  {
	    char *end;
	    g_switch_value = strtoul (optarg, &end, 0);
	    if (*end)
	      einfo (_("%P%F: invalid number `%s'\n"), optarg);
	  }
	  break;
	case 'g':
	  /* Ignore.  */
	  break;
	case OPTION_GC_SECTIONS:
	  command_line.gc_sections = TRUE;
	  break;
	case OPTION_HELP:
	  help ();
	  xexit (0);
	  break;
	case 'L':
	  ldfile_add_library_path (optarg, TRUE);
	  break;
	case 'l':
	  lang_add_input_file (optarg, lang_input_file_is_l_enum, NULL);
	  break;
	case 'M':
	  config.map_filename = "-";
	  break;
	case 'm':
	  /* Ignore.  Was handled in a pre-parse.   */
	  break;
	case OPTION_MAP:
	  config.map_filename = optarg;
	  break;
	case 'N':
	  config.text_read_only = FALSE;
	  config.magic_demand_paged = FALSE;
	  config.dynamic_link = FALSE;
	  break;
	case OPTION_NO_OMAGIC:
	  config.text_read_only = TRUE;
	  config.magic_demand_paged = TRUE;
	  /* NB/ Does not set dynamic_link to TRUE.
	     Use --call-shared or -Bdynamic for this.  */
	  break;
	case 'n':
	  config.magic_demand_paged = FALSE;
	  config.dynamic_link = FALSE;
	  break;
	case OPTION_NO_DEFINE_COMMON:
	  command_line.inhibit_common_definition = TRUE;
	  break;
	case OPTION_NO_DEMANGLE:
	  demangling = FALSE;
	  break;
	case OPTION_NO_GC_SECTIONS:
	  command_line.gc_sections = FALSE;
	  break;
	case OPTION_NO_KEEP_MEMORY:
	  link_info.keep_memory = FALSE;
	  break;
	case OPTION_NO_UNDEFINED:
	  link_info.unresolved_syms_in_objects = how_to_report_unresolved_symbols;
	  break;
	case OPTION_ALLOW_SHLIB_UNDEFINED:
	  link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
	  break;
	case OPTION_NO_ALLOW_SHLIB_UNDEFINED:
	  link_info.unresolved_syms_in_shared_libs = how_to_report_unresolved_symbols;
	  break;
	case OPTION_UNRESOLVED_SYMBOLS:
	  if (strcmp (optarg, "ignore-all") == 0)
	    {
	      link_info.unresolved_syms_in_objects = RM_IGNORE;
	      link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
	    }
	  else if (strcmp (optarg, "report-all") == 0)
	    {
	      link_info.unresolved_syms_in_objects = how_to_report_unresolved_symbols;
	      link_info.unresolved_syms_in_shared_libs = how_to_report_unresolved_symbols;
	    }
	  else if (strcmp (optarg, "ignore-in-object-files") == 0)
	    {
	      link_info.unresolved_syms_in_objects = RM_IGNORE;
	      link_info.unresolved_syms_in_shared_libs = how_to_report_unresolved_symbols;
	    }
      	  else if (strcmp (optarg, "ignore-in-shared-libs") == 0)
	    {
	      link_info.unresolved_syms_in_objects = how_to_report_unresolved_symbols;
	      link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
	    }
	  else
	    einfo (_("%P%F: bad --unresolved-symbols option: %s\n"), optarg);
	  break;
	case OPTION_WARN_UNRESOLVED_SYMBOLS:
	  how_to_report_unresolved_symbols = RM_GENERATE_WARNING;
	  if (link_info.unresolved_syms_in_objects == RM_GENERATE_ERROR)
	    link_info.unresolved_syms_in_objects = RM_GENERATE_WARNING;
	  if (link_info.unresolved_syms_in_shared_libs == RM_GENERATE_ERROR)
	    link_info.unresolved_syms_in_shared_libs = RM_GENERATE_WARNING;
	  break;
	  
	case OPTION_ERROR_UNRESOLVED_SYMBOLS:
	  how_to_report_unresolved_symbols = RM_GENERATE_ERROR;
	  if (link_info.unresolved_syms_in_objects == RM_GENERATE_WARNING)
	    link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR;
	  if (link_info.unresolved_syms_in_shared_libs == RM_GENERATE_WARNING)
	    link_info.unresolved_syms_in_shared_libs = RM_GENERATE_ERROR;
	  break;	  
	case OPTION_ALLOW_MULTIPLE_DEFINITION:
	  link_info.allow_multiple_definition = TRUE;
	  break;
	case OPTION_NO_UNDEFINED_VERSION:
	  link_info.allow_undefined_version = FALSE;
	  break;
	case OPTION_NO_WARN_MISMATCH:
	  command_line.warn_mismatch = FALSE;
	  break;
	case OPTION_NOINHIBIT_EXEC:
	  force_make_executable = TRUE;
	  break;
	case OPTION_NOSTDLIB:
	  config.only_cmd_line_lib_dirs = TRUE;
	  break;
	case OPTION_NO_WHOLE_ARCHIVE:
	  whole_archive = FALSE;
	  break;
	case 'O':
	  /* FIXME "-O<non-digits> <value>" used to set the address of
	     section <non-digits>.  Was this for compatibility with
	     something, or can we create a new option to do that
	     (with a syntax similar to -defsym)?
	     getopt can't handle two args to an option without kludges.  */

	  /* Enable optimizations of output files.  */
	  link_info.optimize = strtoul (optarg, NULL, 0) ? TRUE : FALSE;
	  break;
	case 'o':
	  lang_add_output (optarg, 0);
	  break;
	case OPTION_OFORMAT:
	  lang_add_output_format (optarg, NULL, NULL, 0);
	  break;
	case 'q':
	  link_info.emitrelocations = TRUE;
	  break;
	case 'i':
	case 'r':
	  if (optind == last_optind)
	    /* This can happen if the user put "-rpath,a" on the command
	       line.  (Or something similar.  The comma is important).
	       Getopt becomes confused and thinks that this is a -r option
	       but it cannot parse the text after the -r so it refuses to
	       increment the optind counter.  Detect this case and issue
	       an error message here.  We cannot just make this a warning,
	       increment optind, and continue because getopt is too confused
	       and will seg-fault the next time around.  */
	    einfo(_("%P%F: bad -rpath option\n"));

	  link_info.relocatable = TRUE;
	  config.build_constructors = FALSE;
	  config.magic_demand_paged = FALSE;
	  config.text_read_only = FALSE;
	  config.dynamic_link = FALSE;
	  break;
	case 'R':
	  /* The GNU linker traditionally uses -R to mean to include
	     only the symbols from a file.  The Solaris linker uses -R
	     to set the path used by the runtime linker to find
	     libraries.  This is the GNU linker -rpath argument.  We
	     try to support both simultaneously by checking the file
	     named.  If it is a directory, rather than a regular file,
	     we assume -rpath was meant.  */
	  {
	    struct stat s;

	    if (stat (optarg, &s) >= 0
		&& ! S_ISDIR (s.st_mode))
	      {
		lang_add_input_file (optarg,
				     lang_input_file_is_symbols_only_enum,
				     NULL);
		break;
	      }
	  }
	  /* Fall through.  */
	case OPTION_RPATH:
	  if (command_line.rpath == NULL)
	    command_line.rpath = xstrdup (optarg);
	  else
	    {
	      size_t rpath_len = strlen (command_line.rpath);
	      size_t optarg_len = strlen (optarg);
	      char *buf;
	      char *cp = command_line.rpath;

	      /* First see whether OPTARG is already in the path.  */
	      do
		{
		  size_t idx = 0;

		  while (optarg[idx] != '\0' && optarg[idx] == cp[idx])
		    ++idx;
		  if (optarg[idx] == '\0'
		      && (cp[idx] == '\0' || cp[idx] == ':'))
		    /* We found it.  */
		    break;

		  /* Not yet found.  */
		  cp = strchr (cp, ':');
		  if (cp != NULL)
		    ++cp;
		}
	      while (cp != NULL);

	      if (cp == NULL)
		{
		  buf = xmalloc (rpath_len + optarg_len + 2);
		  sprintf (buf, "%s:%s", command_line.rpath, optarg);
		  free (command_line.rpath);
		  command_line.rpath = buf;
		}
	    }
	  break;
	case OPTION_RPATH_LINK:
	  if (command_line.rpath_link == NULL)
	    command_line.rpath_link = xstrdup (optarg);
	  else
	    {
	      char *buf;

	      buf = xmalloc (strlen (command_line.rpath_link)
			     + strlen (optarg)
			     + 2);
	      sprintf (buf, "%s:%s", command_line.rpath_link, optarg);
	      free (command_line.rpath_link);
	      command_line.rpath_link = buf;
	    }
	  break;
	case OPTION_RELAX:
	  command_line.relax = TRUE;
	  break;
	case OPTION_RETAIN_SYMBOLS_FILE:
	  add_keepsyms_file (optarg);
	  break;
	case 'S':
	  link_info.strip = strip_debugger;
	  break;
	case 's':
	  link_info.strip = strip_all;
	  break;
	case OPTION_STRIP_DISCARDED:
	  link_info.strip_discarded = TRUE;
	  break;
	case OPTION_NO_STRIP_DISCARDED:
	  link_info.strip_discarded = FALSE;
	  break;
	case OPTION_SHARED:
	  if (config.has_shared)
	    {
	      link_info.shared = TRUE;
	      /* When creating a shared library, the default
		 behaviour is to ignore any unresolved references.  */
	      if (link_info.unresolved_syms_in_objects == RM_NOT_YET_SET)
		link_info.unresolved_syms_in_objects = RM_IGNORE;
	      if (link_info.unresolved_syms_in_shared_libs == RM_NOT_YET_SET)
		link_info.unresolved_syms_in_shared_libs = RM_IGNORE;
	    }
	  else
	    einfo (_("%P%F: -shared not supported\n"));
	  break;
	case OPTION_PIE:
	  if (config.has_shared)
	    {
	      link_info.shared = TRUE;
	      link_info.pie = TRUE;
	    }
	  else
	    einfo (_("%P%F: -pie not supported\n"));
	  break;
	case 'h':		/* Used on Solaris.  */
	case OPTION_SONAME:
	  command_line.soname = optarg;
	  break;
	case OPTION_SORT_COMMON:
	  config.sort_common = TRUE;
	  break;
	case OPTION_STATS:
	  config.stats = TRUE;
	  break;
	case OPTION_SYMBOLIC:
	  link_info.symbolic = TRUE;
	  break;
	case 't':
	  trace_files = TRUE;
	  break;
	case 'T':
	  ldfile_open_command_file (optarg);
	  parser_input = input_script;
	  yyparse ();
	  break;
	case OPTION_SECTION_START:
	  {
	    char *optarg2;
	    char *sec_name;
	    int len;

	    /* Check for <something>=<somthing>...  */
	    optarg2 = strchr (optarg, '=');
	    if (optarg2 == NULL)
	      einfo (_("%P%F: invalid argument to option \"--section-start\"\n"));

	    optarg2++;

	    /* So far so good.  Are all the args present?  */
	    if ((*optarg == '\0') || (*optarg2 == '\0'))
	      einfo (_("%P%F: missing argument(s) to option \"--section-start\"\n"));

	    /* We must copy the section name as set_section_start
	       doesn't do it for us.  */
	    len = optarg2 - optarg;
	    sec_name = xmalloc (len);
	    memcpy (sec_name, optarg, len - 1);
	    sec_name[len - 1] = 0;

	    /* Then set it...  */
	    set_section_start (sec_name, optarg2);
	  }
	  break;
	case OPTION_TARGET_HELP:
	  /* Mention any target specific options.  */
	  ldemul_list_emulation_options (stdout);
	  exit (0);
	case OPTION_TBSS:
	  set_section_start (".bss", optarg);
	  break;
	case OPTION_TDATA:
	  set_section_start (".data", optarg);
	  break;
	case OPTION_TTEXT:
	  set_section_start (".text", optarg);
	  break;
	case OPTION_TRADITIONAL_FORMAT:
	  link_info.traditional_format = TRUE;
	  break;
	case OPTION_TASK_LINK:
	  link_info.task_link = TRUE;
	  /* Fall through - do an implied -r option.  */
	case OPTION_UR:
	  link_info.relocatable = TRUE;
	  config.build_constructors = TRUE;
	  config.magic_demand_paged = FALSE;
	  config.text_read_only = FALSE;
	  config.dynamic_link = FALSE;
	  break;
	case 'u':
	  ldlang_add_undef (optarg);
	  break;
	case OPTION_UNIQUE:
	  if (optarg != NULL)
	    lang_add_unique (optarg);
	  else
	    config.unique_orphan_sections = TRUE;
	  break;
	case OPTION_VERBOSE:
	  ldversion (1);
	  version_printed = TRUE;
	  trace_file_tries = TRUE;
	  overflow_cutoff_limit = -2;
	  break;
	case 'v':
	  ldversion (0);
	  version_printed = TRUE;
	  break;
	case 'V':
	  ldversion (1);
	  version_printed = TRUE;
	  break;
	case OPTION_VERSION:
	  ldversion (2);
	  xexit (0);
	  break;
	case OPTION_VERSION_SCRIPT:
	  /* This option indicates a small script that only specifies
	     version information.  Read it, but don't assume that
	     we've seen a linker script.  */
	  {
	    FILE *hold_script_handle;

	    hold_script_handle = saved_script_handle;
	    ldfile_open_command_file (optarg);
	    saved_script_handle = hold_script_handle;
	    parser_input = input_version_script;
	    yyparse ();
	  }
	  break;
	case OPTION_VERSION_EXPORTS_SECTION:
	  /* This option records a version symbol to be applied to the
	     symbols listed for export to be found in the object files
	     .exports sections.  */
	  command_line.version_exports_section = optarg;
	  break;
	case OPTION_WARN_COMMON:
	  config.warn_common = TRUE;
	  break;
	case OPTION_WARN_CONSTRUCTORS:
	  config.warn_constructors = TRUE;
	  break;
	case OPTION_WARN_FATAL:
	  config.fatal_warnings = TRUE;
	  break;
	case OPTION_WARN_MULTIPLE_GP:
	  config.warn_multiple_gp = TRUE;
	  break;
	case OPTION_WARN_ONCE:
	  config.warn_once = TRUE;
	  break;
	case OPTION_WARN_SECTION_ALIGN:
	  config.warn_section_align = TRUE;
	  break;
	case OPTION_WHOLE_ARCHIVE:
	  whole_archive = TRUE;
	  break;
	case OPTION_AS_NEEDED:
	  as_needed = TRUE;
	  break;
	case OPTION_NO_AS_NEEDED:
	  as_needed = FALSE;
	  break;
	case OPTION_WRAP:
	  add_wrap (optarg);
	  break;
	case OPTION_DISCARD_NONE:
	  link_info.discard = discard_none;
	  break;
	case 'X':
	  link_info.discard = discard_l;
	  break;
	case 'x':
	  link_info.discard = discard_all;
	  break;
	case 'Y':
	  if (strncmp (optarg, "P,", 2) == 0)
	    optarg += 2;
	  if (default_dirlist != NULL)
	    free (default_dirlist);
	  default_dirlist = xstrdup (optarg);
	  break;
	case 'y':
	  add_ysym (optarg);
	  break;
	case OPTION_SPARE_DYNAMIC_TAGS:
	  link_info.spare_dynamic_tags = strtoul (optarg, NULL, 0);
	  break;
	case OPTION_SPLIT_BY_RELOC:
	  if (optarg != NULL)
	    config.split_by_reloc = strtoul (optarg, NULL, 0);
	  else
	    config.split_by_reloc = 32768;
	  break;
	case OPTION_SPLIT_BY_FILE:
	  if (optarg != NULL)
	    config.split_by_file = bfd_scan_vma (optarg, NULL, 0);
	  else
	    config.split_by_file = 1;
	  break;
	case OPTION_CHECK_SECTIONS:
	  command_line.check_section_addresses = TRUE;
	  break;
	case OPTION_NO_CHECK_SECTIONS:
	  command_line.check_section_addresses = FALSE;
	  break;
	case OPTION_ACCEPT_UNKNOWN_INPUT_ARCH:
	  command_line.accept_unknown_input_arch = TRUE;
	  break;
	case OPTION_NO_ACCEPT_UNKNOWN_INPUT_ARCH:
	  command_line.accept_unknown_input_arch = FALSE;
	  break;
	case '(':
	  if (ingroup)
	    einfo (_("%P%F: may not nest groups (--help for usage)\n"));

	  lang_enter_group ();
	  ingroup = 1;
	  break;
	case ')':
	  if (! ingroup)
	    einfo (_("%P%F: group ended before it began (--help for usage)\n"));

	  lang_leave_group ();
	  ingroup = 0;
	  break;

	case OPTION_INIT:
	  link_info.init_function = optarg;
	  break;

	case OPTION_FINI:
	  link_info.fini_function = optarg;
	  break;
	}
    }

  if (ingroup)
    lang_leave_group ();

  if (default_dirlist != NULL)
    {
      set_default_dirlist (default_dirlist);
      free (default_dirlist);
    }

  if (link_info.unresolved_syms_in_objects == RM_NOT_YET_SET)
    /* FIXME: Should we allow emulations a chance to set this ?  */
    link_info.unresolved_syms_in_objects = how_to_report_unresolved_symbols;
  
  if (link_info.unresolved_syms_in_shared_libs == RM_NOT_YET_SET)
    /* FIXME: Should we allow emulations a chance to set this ?  */
    link_info.unresolved_syms_in_shared_libs = how_to_report_unresolved_symbols;
}
Beispiel #4
0
bfd_boolean
ldfile_try_open_bfd (const char *attempt,
		     lang_input_statement_type *entry)
{
  entry->the_bfd = bfd_openr (attempt, entry->target);

  if (verbose)
    {
      if (entry->the_bfd == NULL)
	info_msg (_("attempt to open %s failed\n"), attempt);
      else
	info_msg (_("attempt to open %s succeeded\n"), attempt);
    }

  if (entry->the_bfd == NULL)
    {
      if (bfd_get_error () == bfd_error_invalid_target)
	einfo (_("%F%P: invalid BFD target `%s'\n"), entry->target);
      return FALSE;
    }

  /* Linker needs to decompress sections.  */
  entry->the_bfd->flags |= BFD_DECOMPRESS;

  /* This is a linker input BFD.  */
  entry->the_bfd->is_linker_input = 1;

#ifdef ENABLE_PLUGINS
  if (entry->flags.lto_output)
    entry->the_bfd->lto_output = 1;
#endif

  /* If we are searching for this file, see if the architecture is
     compatible with the output file.  If it isn't, keep searching.
     If we can't open the file as an object file, stop the search
     here.  If we are statically linking, ensure that we don't link
     a dynamic object.

     In the code below, it's OK to exit early if the check fails,
     closing the checked BFD and returning FALSE, but if the BFD
     checks out compatible, do not exit early returning TRUE, or
     the plugins will not get a chance to claim the file.  */

  if (entry->flags.search_dirs || !entry->flags.dynamic)
    {
      bfd *check;

      if (bfd_check_format (entry->the_bfd, bfd_archive))
	check = bfd_openr_next_archived_file (entry->the_bfd, NULL);
      else
	check = entry->the_bfd;

      if (check != NULL)
	{
	  if (! bfd_check_format (check, bfd_object))
	    {
	      if (check == entry->the_bfd
		  && entry->flags.search_dirs
		  && bfd_get_error () == bfd_error_file_not_recognized
		  && ! ldemul_unrecognized_file (entry))
		{
		  int token, skip = 0;
		  char *arg, *arg1, *arg2, *arg3;
		  extern FILE *yyin;

		  /* Try to interpret the file as a linker script.  */
		  ldfile_open_command_file (attempt);

		  ldfile_assumed_script = TRUE;
		  parser_input = input_selected;
		  ldlex_both ();
		  token = INPUT_SCRIPT;
		  while (token != 0)
		    {
		      switch (token)
			{
			case OUTPUT_FORMAT:
			  if ((token = yylex ()) != '(')
			    continue;
			  if ((token = yylex ()) != NAME)
			    continue;
			  arg1 = yylval.name;
			  arg2 = NULL;
			  arg3 = NULL;
			  token = yylex ();
			  if (token == ',')
			    {
			      if ((token = yylex ()) != NAME)
				{
				  free (arg1);
				  continue;
				}
			      arg2 = yylval.name;
			      if ((token = yylex ()) != ','
				  || (token = yylex ()) != NAME)
				{
				  free (arg1);
				  free (arg2);
				  continue;
				}
			      arg3 = yylval.name;
			      token = yylex ();
			    }
			  if (token == ')')
			    {
			      switch (command_line.endian)
				{
				default:
				case ENDIAN_UNSET:
				  arg = arg1; break;
				case ENDIAN_BIG:
				  arg = arg2 ? arg2 : arg1; break;
				case ENDIAN_LITTLE:
				  arg = arg3 ? arg3 : arg1; break;
				}
			      if (strcmp (arg, lang_get_output_target ()) != 0)
				skip = 1;
			    }
			  free (arg1);
			  if (arg2) free (arg2);
			  if (arg3) free (arg3);
			  break;
			case NAME:
			case LNAME:
			case VERS_IDENTIFIER:
			case VERS_TAG:
			  free (yylval.name);
			  break;
			case INT:
			  if (yylval.bigint.str)
			    free (yylval.bigint.str);
			  break;
			}
		      token = yylex ();
		    }
		  ldlex_popstate ();
		  ldfile_assumed_script = FALSE;
		  fclose (yyin);
		  yyin = NULL;
		  if (skip)
		    {
		      if (command_line.warn_search_mismatch)
			einfo (_("%P: skipping incompatible %s "
				 "when searching for %s\n"),
			       attempt, entry->local_sym_name);
		      bfd_close (entry->the_bfd);
		      entry->the_bfd = NULL;
		      return FALSE;
		    }
		}
	      goto success;
	    }

	  if (!entry->flags.dynamic && (entry->the_bfd->flags & DYNAMIC) != 0)
	    {
	      einfo (_("%F%P: attempted static link of dynamic object `%s'\n"),
		     attempt);
	      bfd_close (entry->the_bfd);
	      entry->the_bfd = NULL;
	      return FALSE;
	    }

	  if (entry->flags.search_dirs
	      && !bfd_arch_get_compatible (check, link_info.output_bfd,
					   command_line.accept_unknown_input_arch)
	      /* XCOFF archives can have 32 and 64 bit objects.  */
	      && ! (bfd_get_flavour (check) == bfd_target_xcoff_flavour
		    && bfd_get_flavour (link_info.output_bfd) == bfd_target_xcoff_flavour
		    && bfd_check_format (entry->the_bfd, bfd_archive)))
	    {
	      if (command_line.warn_search_mismatch)
		einfo (_("%P: skipping incompatible %s "
			 "when searching for %s\n"),
		       attempt, entry->local_sym_name);
	      bfd_close (entry->the_bfd);
	      entry->the_bfd = NULL;
	      return FALSE;
	    }
	}
    }
success:
#ifdef ENABLE_PLUGINS
  /* If plugins are active, they get first chance to claim
     any successfully-opened input file.  We skip archives
     here; the plugin wants us to offer it the individual
     members when we enumerate them, not the whole file.  We
     also ignore corefiles, because that's just weird.  It is
     a needed side-effect of calling  bfd_check_format with
     bfd_object that it sets the bfd's arch and mach, which
     will be needed when and if we want to bfd_create a new
     one using this one as a template.  */
  if (link_info.lto_plugin_active
      && !no_more_claiming
      && bfd_check_format (entry->the_bfd, bfd_object))
    plugin_maybe_claim (entry);
#endif /* ENABLE_PLUGINS */

  /* It opened OK, the format checked out, and the plugins have had
     their chance to claim it, so this is success.  */
  return TRUE;
}
Beispiel #5
0
bfd_boolean
ldfile_try_open_bfd (const char *attempt,
		     lang_input_statement_type *entry)
{
  entry->the_bfd = bfd_openr (attempt, entry->target);

  if (trace_file_tries)
    {
      if (entry->the_bfd == NULL)
	info_msg (_("attempt to open %s failed\n"), attempt);
      else
	info_msg (_("attempt to open %s succeeded\n"), attempt);
    }

  if (entry->the_bfd == NULL)
    {
      if (bfd_get_error () == bfd_error_invalid_target)
	einfo (_("%F%P: invalid BFD target `%s'\n"), entry->target);
      return FALSE;
    }

  /* If we are searching for this file, see if the architecture is
     compatible with the output file.  If it isn't, keep searching.
     If we can't open the file as an object file, stop the search
     here.  If we are statically linking, ensure that we don't link
     a dynamic object.  */

  if (entry->search_dirs_flag || !entry->dynamic)
    {
      bfd *check;

      if (bfd_check_format (entry->the_bfd, bfd_archive))
	check = bfd_openr_next_archived_file (entry->the_bfd, NULL);
      else
	check = entry->the_bfd;

      if (check != NULL)
	{
	  if (! bfd_check_format (check, bfd_object))
	    {
	      if (check == entry->the_bfd
		  && entry->search_dirs_flag
		  && bfd_get_error () == bfd_error_file_not_recognized
		  && ! ldemul_unrecognized_file (entry))
		{
		  int token, skip = 0;
		  char *arg, *arg1, *arg2, *arg3;
		  extern FILE *yyin;

		  /* Try to interpret the file as a linker script.  */
		  ldfile_open_command_file (attempt);

		  ldfile_assumed_script = TRUE;
		  parser_input = input_selected;
		  ldlex_both ();
		  token = INPUT_SCRIPT;
		  while (token != 0)
		    {
		      switch (token)
			{
			case OUTPUT_FORMAT:
			  if ((token = yylex ()) != '(')
			    continue;
			  if ((token = yylex ()) != NAME)
			    continue;
			  arg1 = yylval.name;
			  arg2 = NULL;
			  arg3 = NULL;
			  token = yylex ();
			  if (token == ',')
			    {
			      if ((token = yylex ()) != NAME)
				{
				  free (arg1);
				  continue;
				}
			      arg2 = yylval.name;
			      if ((token = yylex ()) != ','
				  || (token = yylex ()) != NAME)
				{
				  free (arg1);
				  free (arg2);
				  continue;
				}
			      arg3 = yylval.name;
			      token = yylex ();
			    }
			  if (token == ')')
			    {
			      switch (command_line.endian)
				{
				default:
				case ENDIAN_UNSET:
				  arg = arg1; break;
				case ENDIAN_BIG:
				  arg = arg2 ? arg2 : arg1; break;
				case ENDIAN_LITTLE:
				  arg = arg3 ? arg3 : arg1; break;
				}
			      if (strcmp (arg, lang_get_output_target ()) != 0)
				skip = 1;
			    }
			  free (arg1);
			  if (arg2) free (arg2);
			  if (arg3) free (arg3);
			  break;
			case NAME:
			case LNAME:
			case VERS_IDENTIFIER:
			case VERS_TAG:
			  free (yylval.name);
			  break;
			case INT:
			  if (yylval.bigint.str)
			    free (yylval.bigint.str);
			  break;
			}
		      token = yylex ();
		    }
		  ldlex_popstate ();
		  ldfile_assumed_script = FALSE;
		  fclose (yyin);
		  yyin = NULL;
		  if (skip)
		    {
		      if (command_line.warn_search_mismatch)
			einfo (_("%P: skipping incompatible %s "
				 "when searching for %s\n"),
			       attempt, entry->local_sym_name);
		      bfd_close (entry->the_bfd);
		      entry->the_bfd = NULL;
		      return FALSE;
		    }
		}
	      return TRUE;
	    }

	  if (!entry->dynamic && (entry->the_bfd->flags & DYNAMIC) != 0)
	    {
	      einfo (_("%F%P: attempted static link of dynamic object `%s'\n"),
		     attempt);
	      bfd_close (entry->the_bfd);
	      entry->the_bfd = NULL;
	      return FALSE;
	    }

	  if (entry->search_dirs_flag
	      && !bfd_arch_get_compatible (check, link_info.output_bfd,
					   command_line.accept_unknown_input_arch)
	      /* XCOFF archives can have 32 and 64 bit objects.  */
	      && ! (bfd_get_flavour (check) == bfd_target_xcoff_flavour
		    && bfd_get_flavour (link_info.output_bfd) == bfd_target_xcoff_flavour
		    && bfd_check_format (entry->the_bfd, bfd_archive)))
	    {
	      if (command_line.warn_search_mismatch)
		einfo (_("%P: skipping incompatible %s "
			 "when searching for %s\n"),
		       attempt, entry->local_sym_name);
	      bfd_close (entry->the_bfd);
	      entry->the_bfd = NULL;
	      return FALSE;
	    }
	}
    }

  return TRUE;
}