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authorNiklas Hallqvist <niklas@cvs.openbsd.org>1996-01-08 11:10:27 +0000
committerNiklas Hallqvist <niklas@cvs.openbsd.org>1996-01-08 11:10:27 +0000
commit8b46c09925a80623c289e346c12921bc09fd1678 (patch)
tree01507d0da339cc7e5e6f5d16dfa625f94910b091 /gnu/usr.bin/binutils/ld/ldmain.c
parent5d56227f9458a53138642c1b4488b4a30f85f334 (diff)
Initial GNU binutils 2.6 import
Diffstat (limited to 'gnu/usr.bin/binutils/ld/ldmain.c')
-rw-r--r--gnu/usr.bin/binutils/ld/ldmain.c1084
1 files changed, 1084 insertions, 0 deletions
diff --git a/gnu/usr.bin/binutils/ld/ldmain.c b/gnu/usr.bin/binutils/ld/ldmain.c
new file mode 100644
index 00000000000..0ae8d4f009a
--- /dev/null
+++ b/gnu/usr.bin/binutils/ld/ldmain.c
@@ -0,0 +1,1084 @@
+/* Main program of GNU linker.
+ Copyright (C) 1991, 92, 93, 94, 1995 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>
+
+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;
+
+args_type command_line;
+
+ld_config_type config;
+
+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_ysym 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_ysym
+};
+
+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 ();
+
+ program_name = argv[0];
+ xmalloc_set_program_name (program_name);
+
+ START_PROGRESS (program_name, 0);
+
+ bfd_init ();
+
+ xatexit (remove_output);
+
+ /* Initialize the data about options. */
+ trace_files = trace_file_tries = version_printed = false;
+ whole_archive = false;
+ config.traditional_format = false;
+ config.build_constructors = true;
+ config.dynamic_link = false;
+ command_line.force_common_definition = false;
+ command_line.interpreter = NULL;
+ command_line.rpath = 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.strip = strip_none;
+ link_info.discard = discard_none;
+ link_info.lprefix_len = 1;
+ link_info.lprefix = "L";
+ 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_hash = NULL;
+
+
+ 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.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 ();
+
+ /* 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);
+ }
+
+ if (output_bfd->iostream)
+ fclose ((FILE *) (output_bfd->iostream));
+
+ unlink (output_filename);
+ xexit (1);
+ }
+ else
+ {
+ if (! bfd_close (output_bfd))
+ einfo ("%F%B: final close failed: %E\n", output_bfd);
+ }
+
+ END_PROGRESS (program_name);
+
+ if (config.stats)
+ {
+ extern char **environ;
+#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 = (char *) 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)
+ {
+ /* 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");
+}
+
+/* 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, common_section,
+ common_output_section, complained. 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)
+ minfo ("%s needed due to %T\n", abfd->filename, 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;
+{
+ 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)
+ 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__");
+
+ if (config.map_file != (FILE *) NULL)
+ fprintf (config.map_file,
+ "Adding %s to constructor/destructor set %s\n", name, set_name);
+
+ 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;
+{
+ 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);
+ }
+
+ 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 when a symbol in notice_hash is found. Symbols are
+ put in notice_hash using the -y option. */
+
+/*ARGSUSED*/
+static boolean
+notice_ysym (info, name, abfd, section, value)
+ struct bfd_link_info *info;
+ const char *name;
+ bfd *abfd;
+ asection *section;
+ bfd_vma value;
+{
+ einfo ("%B: %s %s\n", abfd,
+ bfd_is_und_section (section) ? "reference to" : "definition of",
+ name);
+ return true;
+}