19990502 sourceware importbinu_ss_19990502

1 files changed, 1300 insertions, 0 deletions

diff --git a/ld/ldmain.c b/ld/ldmain.c
new file mode 100644
index 0000000..1e710db
--- /dev/null
+++ b/ld/ldmain.c
@@ -0,0 +1,1300 @@
+/* Main program of GNU linker.
+   Copyright (C) 1991, 92, 93, 94, 95, 96, 97, 98, 1999
+   Free Software Foundation, Inc.
+   Written by Steve Chamberlain steve@cygnus.com
+
+This file is part of GLD, the Gnu Linker.
+
+GLD is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GLD is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+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, 59 Temple Place - Suite 330, Boston, MA
+02111-1307, USA.  */
+
+#include "bfd.h"
+#include "sysdep.h"
+#include <stdio.h>
+#include <ctype.h>
+#include "libiberty.h"
+#include "progress.h"
+#include "bfdlink.h"
+
+#include "ld.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 "ldctor.h"
+
+/* 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));
+
+/* EXPORTS */
+
+char *default_target;
+const char *output_filename = "a.out";
+
+/* Name this program was invoked by.  */
+char *program_name;
+
+/* The file that we're creating */
+bfd *output_bfd = 0;
+
+/* Set by -G argument, for MIPS ECOFF target.  */
+int g_switch_value = 8;
+
+/* Nonzero means print names of input files as processed.  */
+boolean trace_files;
+
+/* Nonzero means same, but note open failures, too.  */
+boolean trace_file_tries;
+
+/* Nonzero means version number was printed, so exit successfully
+   instead of complaining if no input files are given.  */
+boolean version_printed;
+
+/* Nonzero means link in every member of an archive.  */
+boolean whole_archive;
+
+/* 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));
+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;
+
+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)
+     int argc;
+     char **argv;
+{
+  char *emulation;
+  long start_time = get_run_time ();
+
+#if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
+  setlocale (LC_MESSAGES, "");
+#endif
+  bindtextdomain (PACKAGE, LOCALEDIR);
+  textdomain (PACKAGE);
+
+  program_name = argv[0];
+  xmalloc_set_program_name (program_name);
+
+  START_PROGRESS (program_name, 0);
+
+  bfd_init ();
+
+  bfd_set_error_program_name (program_name);
+
+  xatexit (remove_output);
+
+  /* Set the default BFD target based on the configured target.  Doing
+     this permits the linker to be configured for a particular target,
+     and linked against a shared BFD library which was configured for
+     a different target.  The macro TARGET is defined by Makefile.  */
+  if (! bfd_set_default_target (TARGET))
+    {
+      einfo (_("%X%P: can't set BFD default target to `%s': %E\n"), TARGET);
+      xexit (1);
+    }
+
+  /* Initialize the 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;
+  command_line.force_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.shared = false;
+  link_info.symbolic = false;
+  link_info.static_link = false;
+  link_info.traditional_format = false;
+  link_info.optimize = false;
+  link_info.no_undefined = false;
+  link_info.strip = strip_none;
+  link_info.discard = discard_none;
+  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;
+  
+  ldfile_add_arch ("");
+
+  config.make_executable = true;
+  force_make_executable = false;
+  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 ();
+  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"));
+    }
+
+  /* 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_none)
+	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)
+    {
+      /* Read the emulation's appropriate default script.  */
+      int isfile;
+      char *s = ldemul_get_script (&isfile);
+
+      if (isfile)
+	ldfile_open_command_file (s);
+      else
+	{
+	  if (trace_file_tries)
+	    {
+	      info_msg (_("using internal linker script:\n"));
+	      info_msg ("==================================================\n");
+	      info_msg (s);
+	      info_msg ("\n==================================================\n");
+	    }
+	  lex_string = s;
+	  lex_redirect (s);
+	}
+      parser_input = input_script;
+      yyparse ();
+      lex_string = NULL;
+    }
+
+  lang_final ();
+
+  if (lang_has_input_file == false)
+    {
+      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 (config.text_read_only)
+    {
+      /* Look for a text section and mark the readonly attribute in it */
+      asection *found = bfd_get_section_by_name (output_bfd, ".text");
+
+      if (found != (asection *) NULL)
+	{
+	  found->flags |= SEC_READONLY;
+	}
+    }
+
+  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 (config.make_executable == false && force_make_executable == false)
+    {
+      if (trace_files == true)
+	{
+	  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 (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
+    }
+
+  /* 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
+   state that's needed by the lex&yacc argument parser (parse_args).  */
+
+static char *
+get_emulation (argc, argv)
+     int argc;
+     char **argv;
+{
+  char *emulation;
+  int i;
+
+  emulation = getenv (EMULATION_ENVIRON);
+  if (emulation == NULL)
+    emulation = DEFAULT_EMULATION;
+
+  for (i = 1; i < argc; i++)
+    {
+      if (!strncmp (argv[i], "-m", 2))
+	{
+	  if (argv[i][2] == '\0')
+	    {
+	      /* -m EMUL */
+	      if (i < argc - 1)
+		{
+		  emulation = argv[i + 1];
+		  i++;
+		}
+	      else
+		{
+		  einfo(_("%P%F: missing argument to -m\n"));
+		}
+	    }
+	  else if (strcmp (argv[i], "-mips1") == 0
+		   || strcmp (argv[i], "-mips2") == 0
+		   || strcmp (argv[i], "-mips3") == 0
+		   || strcmp (argv[i], "-mips4") == 0)
+	    {
+	      /* FIXME: The arguments -mips1, -mips2 and -mips3 are
+		 passed to the linker by some MIPS compilers.  They
+		 generally tell the linker to use a slightly different
+		 library path.  Perhaps someday these should be
+		 implemented as emulations; until then, we just ignore
+		 the arguments and hope that nobody ever creates
+		 emulations named ips1, ips2 or ips3.  */
+	    }
+	  else if (strcmp (argv[i], "-m486") == 0)
+	    {
+	      /* FIXME: The argument -m486 is passed to the linker on
+		 some Linux systems.  Hope that nobody creates an
+		 emulation named 486.  */
+	    }
+	  else
+	    {
+	      /* -mEMUL */
+	      emulation = &argv[i][2];
+	    }
+	}
+    }
+
+  return emulation;
+}
+
+/* If directory DIR contains an "ldscripts" subdirectory,
+   add DIR to the library search path and return true,
+   else return false.  */
+
+static boolean
+check_for_scripts_dir (dir)
+     char *dir;
+{
+  size_t dirlen;
+  char *buf;
+  struct stat s;
+  boolean res;
+
+  dirlen = strlen (dir);
+  /* sizeof counts the terminating NUL.  */
+  buf = (char *) xmalloc (dirlen + sizeof("/ldscripts"));
+  sprintf (buf, "%s/ldscripts", dir);
+
+  res = stat (buf, &s) == 0 && S_ISDIR (s.st_mode);
+  free (buf);
+  if (res)
+    ldfile_add_library_path (dir, false);
+  return res;
+}
+
+/* Set the default directory for finding script files.
+   Libraries will be searched for here too, but that's ok.
+   We look for the "ldscripts" directory in:
+
+   SCRIPTDIR (passed from Makefile)
+   the dir where this program is (for using it from the build tree)
+   the dir where this program is/../lib (for installing the tool suite elsewhere) */
+
+static void
+set_scripts_dir ()
+{
+  char *end, *dir;
+  size_t dirlen;
+
+  if (check_for_scripts_dir (SCRIPTDIR))
+    return;			/* We've been installed normally.  */
+
+  /* Look for "ldscripts" in the dir where our binary is.  */
+  end = strrchr (program_name, '/');
+
+  if (end == NULL)
+    {
+      /* Don't look for ldscripts in the current directory.  There is
+         too much potential for confusion.  */
+      return;
+    }
+
+  dirlen = end - program_name;
+  /* Make a copy of program_name in dir.
+     Leave room for later "/../lib".  */
+  dir = (char *) xmalloc (dirlen + 8);
+  strncpy (dir, program_name, dirlen);
+  dir[dirlen] = '\0';
+
+  if (check_for_scripts_dir (dir))
+    return;			/* Don't free dir.  */
+
+  /* Look for "ldscripts" in <the dir where our binary is>/../lib.  */
+  strcpy (dir + dirlen, "/../lib");
+  if (check_for_scripts_dir (dir))
+    return;
+
+  free (dir);			/* Well, we tried.  */
+}
+
+void
+add_ysym (name)
+     const char *name;
+{
+  if (link_info.notice_hash == (struct bfd_hash_table *) NULL)
+    {
+      link_info.notice_hash = ((struct bfd_hash_table *)
+			       xmalloc (sizeof (struct bfd_hash_table)));
+      if (! bfd_hash_table_init_n (link_info.notice_hash,
+				   bfd_hash_newfunc,
+				   61))
+	einfo (_("%P%F: bfd_hash_table_init failed: %E\n"));
+    }      
+
+  if (bfd_hash_lookup (link_info.notice_hash, name, true, true)
+      == (struct bfd_hash_entry *) NULL)
+    einfo (_("%P%F: bfd_hash_lookup failed: %E\n"));
+}
+
+/* Record a symbol to be wrapped, from the --wrap option.  */
+
+void
+add_wrap (name)
+     const char *name;
+{
+  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"));
+}
+
+/* Handle the -retain-symbols-file option.  */
+
+void
+add_keepsyms_file (filename)
+     const char *filename;
+{
+  FILE *file;
+  char *buf;
+  size_t bufsize;
+  int c;
+
+  if (link_info.strip == strip_some)
+    einfo (_("%X%P: error: duplicate retain-symbols-file\n"));
+
+  file = fopen (filename, "r");
+  if (file == (FILE *) NULL)
+    {
+      bfd_set_error (bfd_error_system_call);
+      einfo ("%X%P: %s: %E\n", filename);
+      return;
+    }
+
+  link_info.keep_hash = ((struct bfd_hash_table *)
+			 xmalloc (sizeof (struct bfd_hash_table)));
+  if (! bfd_hash_table_init (link_info.keep_hash, bfd_hash_newfunc))
+    einfo (_("%P%F: bfd_hash_table_init failed: %E\n"));
+
+  bufsize = 100;
+  buf = (char *) xmalloc (bufsize);
+
+  c = getc (file);
+  while (c != EOF)
+    {
+      while (isspace (c))
+	c = getc (file);
+
+      if (c != EOF)
+	{
+	  size_t len = 0;
+
+	  while (! isspace (c) && c != EOF)
+	    {
+	      buf[len] = c;
+	      ++len;
+	      if (len >= bufsize)
+		{
+		  bufsize *= 2;
+		  buf = xrealloc (buf, bufsize);
+		}
+	      c = getc (file);
+	    }
+
+	  buf[len] = '\0';
+
+	  if (bfd_hash_lookup (link_info.keep_hash, buf, true, true)
+	      == (struct bfd_hash_entry *) NULL)
+	    einfo (_("%P%F: bfd_hash_lookup for insertion failed: %E\n"));
+	}
+    }
+
+  if (link_info.strip != strip_none)
+    einfo (_("%P: `-retain-symbols-file' overrides `-s' and `-S'\n"));
+
+  link_info.strip = strip_some;
+}
+
+/* Callbacks from the BFD linker routines.  */
+
+/* This is called when BFD has decided to include an archive member in
+   a link.  */
+
+/*ARGSUSED*/
+static boolean
+add_archive_element (info, abfd, name)
+     struct bfd_link_info *info;
+     bfd *abfd;
+     const char *name;
+{
+  lang_input_statement_type *input;
+
+  input = ((lang_input_statement_type *)
+	   xmalloc (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)
+    {
+      static boolean header_printed;
+      struct bfd_link_hash_entry *h;
+      bfd *from;
+      int len;
+
+      h = bfd_link_hash_lookup (link_info.hash, name, false, false, true);
+
+      if (h == NULL)
+	from = NULL;
+      else
+	{
+	  switch (h->type)
+	    {
+	    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];
+
+	  sprintf (buf, "%-29s %s\n\n", _("Archive member included"),
+		   _("because of file (symbol)"));
+	  minfo ("%s", buf);
+	  header_printed = true;
+	}
+
+      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);
+	}
+
+      if (len >= 29)
+	{
+	  print_nl ();
+	  len = 0;
+	}
+      while (len < 30)
+	{
+	  print_space ();
+	  ++len;
+	}
+
+      if (from != NULL)
+	minfo ("%B ", from);
+      if (h != NULL)
+	minfo ("(%T)\n", h->root.string);
+      else
+	minfo ("(%s)\n", name);
+    }
+
+  if (trace_files || trace_file_tries)
+    info_msg ("%I\n", input);
+
+  return true;
+}
+
+/* This is called when BFD has discovered a symbol which is defined
+   multiple times.  */
+
+/*ARGSUSED*/
+static boolean
+multiple_definition (info, name, obfd, osec, oval, nbfd, nsec, nval)
+     struct bfd_link_info *info;
+     const char *name;
+     bfd *obfd;
+     asection *osec;
+     bfd_vma oval;
+     bfd *nbfd;
+     asection *nsec;
+     bfd_vma nval;
+{
+  /* 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);
+  return true;
+}
+
+/* This is called when there is a definition of a common symbol, or
+   when a common symbol is found for a symbol that is already defined,
+   or when two common symbols are found.  We only do something if
+   -warn-common was used.  */
+
+/*ARGSUSED*/
+static boolean
+multiple_common (info, name, obfd, otype, osize, nbfd, ntype, nsize)
+     struct bfd_link_info *info;
+     const char *name;
+     bfd *obfd;
+     enum bfd_link_hash_type otype;
+     bfd_vma osize;
+     bfd *nbfd;
+     enum bfd_link_hash_type ntype;
+     bfd_vma nsize;
+{
+  if (! config.warn_common)
+    return true;
+
+  if (ntype == bfd_link_hash_defined
+      || ntype == bfd_link_hash_defweak
+      || ntype == bfd_link_hash_indirect)
+    {
+      ASSERT (otype == bfd_link_hash_common);
+      einfo (_("%B: warning: definition of `%T' overriding common\n"),
+	     nbfd, name);
+      if (obfd != NULL)
+	einfo (_("%B: warning: common is here\n"), obfd);
+    }
+  else if (otype == bfd_link_hash_defined
+	   || otype == bfd_link_hash_defweak
+	   || otype == bfd_link_hash_indirect)
+    {
+      ASSERT (ntype == bfd_link_hash_common);
+      einfo (_("%B: warning: common of `%T' overridden by definition\n"),
+	     nbfd, name);
+      if (obfd != NULL)
+	einfo (_("%B: warning: defined here\n"), obfd);
+    }
+  else
+    {
+      ASSERT (otype == bfd_link_hash_common && ntype == bfd_link_hash_common);
+      if (osize > nsize)
+	{
+	  einfo (_("%B: warning: common of `%T' overridden by larger common\n"),
+		 nbfd, name);
+	  if (obfd != NULL)
+	    einfo (_("%B: warning: larger common is here\n"), obfd);
+	}
+      else if (nsize > osize)
+	{
+	  einfo (_("%B: warning: common of `%T' overriding smaller common\n"),
+		 nbfd, name);
+	  if (obfd != NULL)
+	    einfo (_("%B: warning: smaller common is here\n"), obfd);
+	}
+      else
+	{
+	  einfo (_("%B: warning: multiple common of `%T'\n"), nbfd, name);
+	  if (obfd != NULL)
+	    einfo (_("%B: warning: previous common is here\n"), obfd);
+	}
+    }
+
+  return true;
+}
+
+/* This is called when BFD has discovered a set element.  H is the
+   entry in the linker hash table for the set.  SECTION and VALUE
+   represent a value which should be added to the set.  */
+
+/*ARGSUSED*/
+static boolean
+add_to_set (info, h, reloc, abfd, section, value)
+     struct bfd_link_info *info;
+     struct bfd_link_hash_entry *h;
+     bfd_reloc_code_real_type reloc;
+     bfd *abfd;
+     asection *section;
+     bfd_vma value;
+{
+  if (config.warn_constructors)
+    einfo (_("%P: warning: global constructor %s used\n"),
+	   h->root.string);
+
+  if (! config.build_constructors)
+    return true;
+
+  ldctor_add_set_entry (h, reloc, (const char *) NULL, section, value);
+
+  if (h->type == bfd_link_hash_new)
+    {
+      h->type = bfd_link_hash_undefined;
+      h->u.undef.abfd = abfd;
+      /* We don't call bfd_link_add_undef to add this to the list of
+	 undefined symbols because we are going to define it
+	 ourselves.  */
+    }
+
+  return true;
+}
+
+/* This is called when BFD has discovered a constructor.  This is only
+   called for some object file formats--those which do not handle
+   constructors in some more clever fashion.  This is similar to
+   adding an element to a set, but less general.  */
+
+static boolean
+constructor_callback (info, constructor, name, abfd, section, value)
+     struct bfd_link_info *info;
+     boolean constructor;
+     const char *name;
+     bfd *abfd;
+     asection *section;
+     bfd_vma value;
+{
+  char *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__");
+
+  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)
+    {
+      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;
+}
+
+/* A structure used by warning_callback to pass information through
+   bfd_map_over_sections.  */
+
+struct warning_callback_info
+{
+  boolean found;
+  const char *warning;
+  const char *symbol;
+  asymbol **asymbols;
+};
+
+/* This is called when there is a reference to a warning symbol.  */
+
+/*ARGSUSED*/
+static boolean
+warning_callback (info, warning, symbol, abfd, section, address)
+     struct bfd_link_info *info;
+     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
+    {
+      lang_input_statement_type *entry;
+      asymbol **asymbols;
+      struct warning_callback_info info;
+
+      /* Look through the relocs to see if we can find a plausible
+	 address.  */
+
+      entry = (lang_input_statement_type *) abfd->usrdata;
+      if (entry != NULL && entry->asymbols != NULL)
+	asymbols = entry->asymbols;
+      else
+	{
+	  long symsize;
+	  long symbol_count;
+
+	  symsize = bfd_get_symtab_upper_bound (abfd);
+	  if (symsize < 0)
+	    einfo (_("%B%F: could not read symbols: %E\n"), abfd);
+	  asymbols = (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;
+	    }
+	}
+
+      info.found = false;
+      info.warning = warning;
+      info.symbol = symbol;
+      info.asymbols = asymbols;
+      bfd_map_over_sections (abfd, warning_find_reloc, (PTR) &info);
+
+      if (! info.found)
+	einfo ("%B: %s\n", abfd, warning);
+
+      if (entry == NULL)
+	free (asymbols);
+    }
+
+  return true;
+}
+
+/* This is called by warning_callback for each section.  It checks the
+   relocs of the section to see if it can find a reference to the
+   symbol which triggered the warning.  If it can, it uses the reloc
+   to give an error message with a file and line number.  */
+
+static void
+warning_find_reloc (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;
+
+  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;
+
+  relpp = (arelent **) xmalloc (relsize);
+  relcount = bfd_canonicalize_reloc (abfd, sec, relpp, info->asymbols);
+  if (relcount < 0)
+    einfo (_("%B%F: could not read relocs: %E\n"), abfd);
+
+  p = relpp;
+  pend = p + relcount;
+  for (; p < pend && *p != NULL; p++)
+    {
+      arelent *q = *p;
+
+      if (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;
+	}
+    }
+
+  free (relpp);
+}
+
+/* This is called when an undefined symbol is found.  */
+
+/*ARGSUSED*/
+static boolean
+undefined_symbol (info, name, abfd, section, address)
+     struct bfd_link_info *info;
+     const char *name;
+     bfd *abfd;
+     asection *section;
+     bfd_vma address;
+{
+  static char *error_name;
+  static unsigned int error_count;
+
+#define MAX_ERRORS_IN_A_ROW 5
+
+  if (config.warn_once)
+    {
+      static struct bfd_hash_table *hash;
+
+      /* Only warn once about a particular undefined symbol.  */
+
+      if (hash == NULL)
+	{
+	  hash = ((struct bfd_hash_table *)
+		  xmalloc (sizeof (struct bfd_hash_table)));
+	  if (! bfd_hash_table_init (hash, bfd_hash_newfunc))
+	    einfo (_("%F%P: bfd_hash_table_init failed: %E\n"));
+	}
+
+      if (bfd_hash_lookup (hash, name, false, false) != NULL)
+	return true;
+
+      if (bfd_hash_lookup (hash, name, true, true) == NULL)
+	einfo (_("%F%P: bfd_hash_lookup failed: %E\n"));
+    }
+
+  /* We never print more than a reasonable number of errors in a row
+     for a single symbol.  */
+  if (error_name != (char *) NULL
+      && strcmp (name, error_name) == 0)
+    ++error_count;
+  else
+    {
+      error_count = 0;
+      if (error_name != (char *) NULL)
+	free (error_name);
+      error_name = buystring (name);
+    }
+
+  if (section != NULL)
+    {
+      if (error_count < MAX_ERRORS_IN_A_ROW)
+	einfo (_("%X%C: undefined reference to `%T'\n"),
+	       abfd, section, address, name);
+      else if (error_count == MAX_ERRORS_IN_A_ROW)
+	einfo (_("%D: more undefined references to `%T' follow\n"),
+	       abfd, section, address, name);
+    }
+  else
+    {
+      if (error_count < MAX_ERRORS_IN_A_ROW)
+	einfo (_("%X%B: undefined reference to `%T'\n"),
+	       abfd, name);
+      else if (error_count == MAX_ERRORS_IN_A_ROW)
+	einfo (_("%B: more undefined references to `%T' follow\n"),
+	       abfd, name);
+    }
+
+  return true;
+}
+
+/* This is called when a reloc overflows.  */
+
+/*ARGSUSED*/
+static boolean
+reloc_overflow (info, name, reloc_name, addend, abfd, section, address)
+     struct bfd_link_info *info;
+     const char *name;
+     const char *reloc_name;
+     bfd_vma addend;
+     bfd *abfd;
+     asection *section;
+     bfd_vma address;
+{
+  if (abfd == (bfd *) NULL)
+    einfo (_("%P%X: generated"));
+  else
+    einfo ("%X%C:", abfd, section, address);
+  einfo (_(" relocation truncated to fit: %s %T"), reloc_name, name);
+  if (addend != 0)
+    einfo ("+%v", addend);
+  einfo ("\n");
+  return true;
+}
+
+/* This is called when a dangerous relocation is made.  */
+
+/*ARGSUSED*/
+static boolean
+reloc_dangerous (info, message, abfd, section, address)
+     struct bfd_link_info *info;
+     const char *message;
+     bfd *abfd;
+     asection *section;
+     bfd_vma address;
+{
+  if (abfd == (bfd *) NULL)
+    einfo (_("%P%X: generated"));
+  else
+    einfo ("%X%C:", abfd, section, address);
+  einfo (_("dangerous relocation: %s\n"), message);
+  return true;
+}
+
+/* This is called when a reloc is being generated attached to a symbol
+   that is not being output.  */
+
+/*ARGSUSED*/
+static boolean
+unattached_reloc (info, name, abfd, section, address)
+     struct bfd_link_info *info;
+     const char *name;
+     bfd *abfd;
+     asection *section;
+     bfd_vma address;
+{
+  if (abfd == (bfd *) NULL)
+    einfo (_("%P%X: generated"));
+  else
+    einfo ("%X%C:", abfd, section, address);
+  einfo (_(" reloc refers to symbol `%T' which is not being output\n"), name);
+  return true;
+}
+
+/* This is called 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.  */
+
+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);
+    }
+
+  if (command_line.cref || nocrossref_list != NULL)
+    add_cref (name, abfd, section, value);
+
+  return true;
+}