/* Main program of GNU linker.
- Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
- 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
- Free Software Foundation, Inc.
+ Copyright (C) 1991-2014 Free Software Foundation, Inc.
Written by Steve Chamberlain steve@cygnus.com
This file is part of the GNU Binutils.
char * ld_canon_sysroot;
int ld_canon_sysroot_len;
-/* Set by -G argument, for MIPS ECOFF target. */
+/* Set by -G argument, for targets like MIPS ELF. */
int g_switch_value = 8;
/* Nonzero means print names of input files as processed. */
bfd_boolean trace_files;
-/* Nonzero means same, but note open failures, too. */
-bfd_boolean trace_file_tries;
+/* Nonzero means report actions taken by the linker, and describe the linker script in use. */
+bfd_boolean verbose;
/* Nonzero means version number was printed, so exit successfully
instead of complaining if no input files are given. */
bfd_boolean version_printed;
-/* Nonzero means link in every member of an archive. */
-bfd_boolean whole_archive;
-
-/* True means only create DT_NEEDED entries for dynamic libraries
- if they actually satisfy some reference in a regular object. */
-bfd_boolean add_DT_NEEDED_for_regular;
-
-/* True means create DT_NEEDED entries for dynamic libraries that
- are DT_NEEDED by dynamic libraries specifically mentioned on
- the command line. */
-bfd_boolean add_DT_NEEDED_for_dynamic = TRUE;
-
/* TRUE if we should demangle symbol names. */
bfd_boolean demangling;
static bfd_boolean unattached_reloc
(struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma);
static bfd_boolean notice
- (struct bfd_link_info *, const char *, bfd *, asection *, bfd_vma);
+ (struct bfd_link_info *, struct bfd_link_hash_entry *,
+ struct bfd_link_hash_entry *, bfd *, asection *, bfd_vma, flagword);
static struct bfd_link_callbacks link_callbacks =
{
ldlang_override_segment_assignment
};
+static bfd_assert_handler_type default_bfd_assert_handler;
+
struct bfd_link_info link_info;
\f
static void
unlink_if_ordinary (output_filename);
}
+/* If there's a BFD assertion, we'll notice and exit with an error
+ unless otherwise instructed. */
+
+static void
+ld_bfd_assert_handler (const char *fmt, const char *bfdver,
+ const char *file, int line)
+{
+ (*default_bfd_assert_handler) (fmt, bfdver, file, line);
+ config.make_executable = FALSE;
+}
+
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, "");
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. */
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;
- 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
link_info.allow_undefined_version = TRUE;
link_info.keep_memory = TRUE;
+ link_info.new_dtags = TRUE;
link_info.combreloc = TRUE;
link_info.strip_discarded = TRUE;
link_info.emit_hash = TRUE;
+ link_info.emit_gnu_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
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;
+#ifdef ENABLE_PLUGINS
+ /* Now all the plugin arguments have been gathered, we can load them. */
+ plugin_load_plugins ();
+#endif /* ENABLE_PLUGINS */
- /* 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;
- }
+ ldemul_set_symbols ();
/* If we have not already opened and parsed a linker script,
try the default script from command line first. */
else
{
lex_string = s;
- lex_redirect (s);
+ lex_redirect (s, _("built in linker script"), 1);
}
parser_input = input_script;
yyparse ();
lex_string = NULL;
}
- if (trace_file_tries)
+ if (verbose)
{
if (saved_script_handle)
info_msg (_("using external linker script:"));
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)
+ if (version_printed || command_line.print_output_format)
xexit (0);
einfo (_("%P%F: no input files\n"));
}
output_cref (config.map_file != NULL ? config.map_file : stdout);
if (nocrossref_list != NULL)
check_nocrossrefs ();
+#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
lang_finish ();
/* Even if we're producing relocatable output, some non-fatal errors should
einfo (_("%P: link errors found, deleting executable `%s'\n"),
output_filename);
- /* The file will be removed by remove_output. */
+ /* The file will be removed by ld_cleanup. */
xexit (1);
}
else
program_name, run_time / 1000000, run_time % 1000000);
#ifdef HAVE_SBRK
fprintf (stderr, _("%s: data size %ld\n"), program_name,
- (long) (lim - (char *) &environ));
+ (long) (lim - start_sbrk));
#endif
fflush (stderr);
}
- /* Prevent remove_output from doing anything, after a successful link. */
+ /* Prevent ld_cleanup from doing anything, after a successful link. */
output_filename = NULL;
xexit (0);
|| strcmp (argv[i], "-mips5") == 0
|| strcmp (argv[i], "-mips32") == 0
|| strcmp (argv[i], "-mips32r2") == 0
+ || strcmp (argv[i], "-mips32r6") == 0
|| strcmp (argv[i], "-mips64") == 0
- || strcmp (argv[i], "-mips64r2") == 0)
+ || strcmp (argv[i], "-mips64r2") == 0
+ || strcmp (argv[i], "-mips64r6") == 0)
{
/* FIXME: The arguments -mips1, -mips2, -mips3, etc. are
passed to the linker by some MIPS compilers. They
einfo (_("%P%F: bfd_hash_lookup failed: %E\n"));
}
+void
+add_ignoresym (struct bfd_link_info *info, const char *name)
+{
+ if (info->ignore_hash == NULL)
+ {
+ info->ignore_hash = xmalloc (sizeof (struct bfd_hash_table));
+ if (! bfd_hash_table_init_n (info->ignore_hash,
+ bfd_hash_newfunc,
+ sizeof (struct bfd_hash_entry),
+ 61))
+ einfo (_("%P%F: bfd_hash_table_init failed: %E\n"));
+ }
+
+ if (bfd_hash_lookup (info->ignore_hash, name, TRUE, TRUE) == NULL)
+ einfo (_("%P%F: bfd_hash_lookup failed: %E\n"));
+}
+
/* Record a symbol to be wrapped, from the --wrap option. */
void
free (buf);
link_info.strip = strip_some;
+ fclose (file);
}
\f
/* Callbacks from the BFD linker routines. */
BFD, but we still want to output the original BFD filename. */
orig_input = *input;
#ifdef ENABLE_PLUGINS
- if (bfd_my_archive (abfd) != NULL
- && plugin_active_plugins_p ()
- && !no_more_claiming)
+ if (plugin_active_plugins_p () && !no_more_claiming)
{
/* We must offer this archive member to the plugins to claim. */
- int fd = open (bfd_my_archive (abfd)->filename, O_RDONLY | O_BINARY);
+ const char *filename = (bfd_my_archive (abfd) != NULL
+ ? bfd_my_archive (abfd)->filename : abfd->filename);
+ int fd = open (filename, O_RDONLY | O_BINARY);
if (fd >= 0)
{
struct ld_plugin_input_file file;
member, not the whole file, and must exclude the header.
Fortunately for us, that is how the data is stored in the
origin field of the bfd and in the arelt_data. */
- file.name = bfd_my_archive (abfd)->filename;
+ file.name = filename;
file.offset = abfd->origin;
file.filesize = arelt_size (abfd);
file.fd = fd;
plugin_maybe_claim (&file, input);
- if (input->claimed)
+ if (input->flags.claimed)
{
- input->claim_archive = TRUE;
+ input->flags.claim_archive = TRUE;
*subsbfd = input->the_bfd;
}
}
{
char buf[100];
- sprintf (buf, _("Archive member included because of file (symbol)\n\n"));
+ sprintf (buf, _("Archive member included "
+ "to satisfy reference by file (symbol)\n\n"));
minfo ("%s", buf);
header_printed = TRUE;
}
minfo ("(%s)\n", name);
}
- if (trace_files || trace_file_tries)
+ if (trace_files || verbose)
info_msg ("%I\n", &orig_input);
return TRUE;
}
if (obfd != NULL)
einfo (_("%D: first defined here\n"), obfd, osec, oval);
- if (RELAXATION_ENABLED)
+ if (RELAXATION_ENABLED_BY_USER)
{
einfo (_("%P: Disabling relaxation: it will not work with multiple definitions\n"));
- command_line.disable_target_specific_optimizations = -1;
+ DISABLE_RELAXATION;
}
return TRUE;
/* Ensure that BFD_RELOC_CTOR exists now, so that we can give a
useful error message. */
- if (bfd_reloc_type_lookup (link_info.output_bfd, BFD_RELOC_CTOR) == NULL
+ if (bfd_reloc_type_lookup (info->output_bfd, BFD_RELOC_CTOR) == NULL
&& (info->relocatable
|| bfd_reloc_type_lookup (abfd, BFD_RELOC_CTOR) == NULL))
einfo (_("%P%F: BFD backend error: BFD_RELOC_CTOR unsupported\n"));
asymbol **asymbols;
};
+/* Look through the relocs to see if we can find a plausible address
+ for SYMBOL in ABFD. Return TRUE if found. Otherwise return FALSE. */
+
+static bfd_boolean
+symbol_warning (const char *warning, const char *symbol, bfd *abfd)
+{
+ struct warning_callback_info cinfo;
+
+ if (!bfd_generic_link_read_symbols (abfd))
+ einfo (_("%B%F: could not read symbols: %E\n"), abfd);
+
+ cinfo.found = FALSE;
+ cinfo.warning = warning;
+ cinfo.symbol = symbol;
+ cinfo.asymbols = bfd_get_outsymbols (abfd);
+ bfd_map_over_sections (abfd, warning_find_reloc, &cinfo);
+ return cinfo.found;
+}
+
/* This is called when there is a reference to a warning symbol. */
static bfd_boolean
einfo ("%P: %s%s\n", _("warning: "), warning);
else if (symbol == NULL)
einfo ("%B: %s%s\n", abfd, _("warning: "), warning);
- else
+ else if (! symbol_warning (warning, symbol, abfd))
{
- struct warning_callback_info cinfo;
-
- /* Look through the relocs to see if we can find a plausible
- address. */
-
- if (!bfd_generic_link_read_symbols (abfd))
- einfo (_("%B%F: could not read symbols: %E\n"), abfd);
-
- cinfo.found = FALSE;
- cinfo.warning = warning;
- cinfo.symbol = symbol;
- cinfo.asymbols = bfd_get_outsymbols (abfd);
- bfd_map_over_sections (abfd, warning_find_reloc, &cinfo);
-
- if (! cinfo.found)
- einfo ("%B: %s%s\n", abfd, _("warning: "), warning);
+ bfd *b;
+ /* Search all input files for a reference to SYMBOL. */
+ for (b = info->input_bfds; b; b = b->link.next)
+ if (b != abfd && symbol_warning (warning, symbol, b))
+ return TRUE;
+ einfo ("%B: %s%s\n", abfd, _("warning: "), warning);
}
return TRUE;
/* This is called when an undefined symbol is found. */
static bfd_boolean
-undefined_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED,
+undefined_symbol (struct bfd_link_info *info,
const char *name,
bfd *abfd,
asection *section,
#define MAX_ERRORS_IN_A_ROW 5
+ if (info->ignore_hash != NULL
+ && bfd_hash_lookup (info->ignore_hash, name, FALSE, FALSE) != NULL)
+ return TRUE;
+
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,
- sizeof (struct bfd_hash_entry)))
- einfo (_("%F%P: bfd_hash_table_init failed: %E\n"));
- }
-
- if (bfd_hash_lookup (hash, name, FALSE, FALSE) != NULL)
- return TRUE;
-
- if (bfd_hash_lookup (hash, name, TRUE, TRUE) == NULL)
- einfo (_("%F%P: bfd_hash_lookup failed: %E\n"));
+ add_ignoresym (info, name);
}
/* We never print more than a reasonable number of errors in a row
/* This is called when a reloc overflows. */
static bfd_boolean
-reloc_overflow (struct bfd_link_info *info ATTRIBUTE_UNUSED,
+reloc_overflow (struct bfd_link_info *info,
struct bfd_link_hash_entry *entry,
const char *name,
const char *reloc_name,
if (overflow_cutoff_limit == -1)
return TRUE;
- einfo ("%X%C:", abfd, section, address);
+ einfo ("%X%H:", abfd, section, address);
if (overflow_cutoff_limit >= 0
&& overflow_cutoff_limit-- == 0)
reloc_name, entry->root.string,
entry->u.def.section,
entry->u.def.section == bfd_abs_section_ptr
- ? link_info.output_bfd : entry->u.def.section->owner);
+ ? info->output_bfd : entry->u.def.section->owner);
break;
default:
abort ();
asection *section,
bfd_vma address)
{
- einfo (_("%X%C: dangerous relocation: %s\n"),
+ einfo (_("%X%H: dangerous relocation: %s\n"),
abfd, section, address, message);
return TRUE;
}
asection *section,
bfd_vma address)
{
- einfo (_("%X%C: reloc refers to symbol `%T' which is not being output\n"),
+ einfo (_("%X%H: reloc refers to symbol `%T' which is not being output\n"),
abfd, section, address, name);
return TRUE;
}
static bfd_boolean
notice (struct bfd_link_info *info,
- const char *name,
+ struct bfd_link_hash_entry *h,
+ struct bfd_link_hash_entry *inh ATTRIBUTE_UNUSED,
bfd *abfd,
asection *section,
- bfd_vma value)
+ bfd_vma value,
+ flagword flags ATTRIBUTE_UNUSED)
{
- if (name == NULL)
+ const char *name;
+
+ if (h == NULL)
{
if (command_line.cref || nocrossref_list != NULL)
return handle_asneeded_cref (abfd, (enum notice_asneeded_action) value);
return TRUE;
}
+ name = h->root.string;
if (info->notice_hash != NULL
&& bfd_hash_lookup (info->notice_hash, name, FALSE, FALSE) != NULL)
{
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