Copyright 1991, 1992, 1993, 1994, 1995, 1998, 1999, 2000, 2001, 2002,
2003, 2004, 2005, 2007, 2008, 2009, 2010, 2011
Free Software Foundation, Inc.
This file is part of the GNU Binutils.
This program 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 3 of the License, or
(at your option) any later version.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, USA. */
#include "sysdep.h"
#include "bfd.h"
#include "bfdlink.h"
#include "safe-ctype.h"
#include "ld.h"
#include "ldmisc.h"
#include "ldexp.h"
#include "ldlang.h"
#include "ldfile.h"
#include "ldmain.h"
#include <ldgram.h>
#include "ldlex.h"
#include "ldemul.h"
#include "libiberty.h"
#include "filenames.h"
#ifdef ENABLE_PLUGINS
#include "plugin-api.h"
#include "plugin.h"
#endif
const char * ldfile_input_filename;
bfd_boolean ldfile_assumed_script = FALSE;
const char * ldfile_output_machine_name = "";
unsigned long ldfile_output_machine;
enum bfd_architecture ldfile_output_architecture;
search_dirs_type * search_head;
#ifdef VMS
static char * slash = "";
#else
#if defined (_WIN32) && ! defined (__CYGWIN32__)
static char * slash = "\\";
#else
static char * slash = "/";
#endif
#endif
typedef struct search_arch
{
char *name;
struct search_arch *next;
} search_arch_type;
static search_dirs_type **search_tail_ptr = &search_head;
static search_arch_type *search_arch_head;
static search_arch_type **search_arch_tail_ptr = &search_arch_head;
sub-directory of the sysroot directory. */
static bfd_boolean
is_sysrooted_pathname (const char *name, bfd_boolean notsame)
{
char * realname = ld_canon_sysroot ? lrealpath (name) : NULL;
int len;
bfd_boolean result;
if (! realname)
return FALSE;
len = strlen (realname);
if (((! notsame && len == ld_canon_sysroot_len)
|| (len >= ld_canon_sysroot_len
&& IS_DIR_SEPARATOR (realname[ld_canon_sysroot_len])
&& (realname[ld_canon_sysroot_len] = '\0') == '\0'))
&& FILENAME_CMP (ld_canon_sysroot, realname) == 0)
result = TRUE;
else
result = FALSE;
if (realname)
free (realname);
return result;
}
Makes a copy of NAME using xmalloc(). */
void
ldfile_add_library_path (const char *name, bfd_boolean cmdline)
{
search_dirs_type *new_dirs;
if (!cmdline && config.only_cmd_line_lib_dirs)
return;
new_dirs = (search_dirs_type *) xmalloc (sizeof (search_dirs_type));
new_dirs->next = NULL;
new_dirs->cmdline = cmdline;
*search_tail_ptr = new_dirs;
search_tail_ptr = &new_dirs->next;
now. */
if (name[0] == '=')
{
new_dirs->name = concat (ld_sysroot, name + 1, (const char *) NULL);
new_dirs->sysrooted = TRUE;
}
else
{
new_dirs->name = xstrdup (name);
new_dirs->sysrooted = is_sysrooted_pathname (name, FALSE);
}
}
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;
}
entry->the_bfd->flags |= BFD_DECOMPRESS;
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->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;
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->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)
&& ! (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
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 (bfd_check_format (entry->the_bfd, bfd_object)
&& plugin_active_plugins_p ()
&& !no_more_claiming)
{
int fd = open (attempt, O_RDONLY | O_BINARY);
if (fd >= 0)
{
struct ld_plugin_input_file file;
file.name = attempt;
file.offset = 0;
file.filesize = lseek (fd, 0, SEEK_END);
file.fd = fd;
plugin_maybe_claim (&file, entry);
}
}
#endif
their chance to claim it, so this is success. */
return TRUE;
}
archive, use ARCH, LIB and SUFFIX to modify the file name. */
bfd_boolean
ldfile_open_file_search (const char *arch,
lang_input_statement_type *entry,
const char *lib,
const char *suffix)
{
search_dirs_type *search;
directory first. */
if (! entry->maybe_archive)
{
if (entry->sysrooted && IS_ABSOLUTE_PATH (entry->filename))
{
char *name = concat (ld_sysroot, entry->filename,
(const char *) NULL);
if (ldfile_try_open_bfd (name, entry))
{
entry->filename = name;
return TRUE;
}
free (name);
}
else if (ldfile_try_open_bfd (entry->filename, entry))
{
entry->sysrooted = IS_ABSOLUTE_PATH (entry->filename)
&& is_sysrooted_pathname (entry->filename, TRUE);
return TRUE;
}
if (IS_ABSOLUTE_PATH (entry->filename))
return FALSE;
}
for (search = search_head; search != NULL; search = search->next)
{
char *string;
if (entry->dynamic && ! link_info.relocatable)
{
if (ldemul_open_dynamic_archive (arch, search, entry))
{
entry->sysrooted = search->sysrooted;
return TRUE;
}
}
if (entry->maybe_archive)
string = concat (search->name, slash, lib, entry->filename,
arch, suffix, (const char *) NULL);
else
string = concat (search->name, slash, entry->filename,
(const char *) 0);
if (ldfile_try_open_bfd (string, entry))
{
entry->filename = string;
entry->sysrooted = search->sysrooted;
return TRUE;
}
free (string);
}
return FALSE;
}
PR 4437: Do not stop on the first missing file, but
continue processing other input files in case there
are more errors to report. */
void
ldfile_open_file (lang_input_statement_type *entry)
{
if (entry->the_bfd != NULL)
return;
if (! entry->search_dirs_flag)
{
if (ldfile_try_open_bfd (entry->filename, entry))
return;
if (filename_cmp (entry->filename, entry->local_sym_name) != 0)
einfo (_("%P: cannot find %s (%s): %E\n"),
entry->filename, entry->local_sym_name);
else
einfo (_("%P: cannot find %s: %E\n"), entry->local_sym_name);
entry->missing_file = TRUE;
missing_file = TRUE;
}
else
{
search_arch_type *arch;
bfd_boolean found = FALSE;
for (arch = search_arch_head; arch != NULL; arch = arch->next)
{
found = ldfile_open_file_search (arch->name, entry, "lib", ".a");
if (found)
break;
#ifdef VMS
found = ldfile_open_file_search (arch->name, entry, ":lib", ".a");
if (found)
break;
#endif
found = ldemul_find_potential_libraries (arch->name, entry);
if (found)
break;
}
again. */
if (found)
entry->search_dirs_flag = FALSE;
else
{
if (entry->sysrooted
&& ld_sysroot
&& IS_ABSOLUTE_PATH (entry->local_sym_name))
einfo (_("%P: cannot find %s inside %s\n"),
entry->local_sym_name, ld_sysroot);
else
einfo (_("%P: cannot find %s\n"), entry->local_sym_name);
entry->missing_file = TRUE;
missing_file = TRUE;
}
}
}
static FILE *
try_open (const char *name, const char *exten)
{
FILE *result;
result = fopen (name, "r");
if (trace_file_tries)
{
if (result == NULL)
info_msg (_("cannot find script file %s\n"), name);
else
info_msg (_("opened script file %s\n"), name);
}
if (result != NULL)
return result;
if (*exten)
{
char *buff;
buff = concat (name, exten, (const char *) NULL);
result = fopen (buff, "r");
if (trace_file_tries)
{
if (result == NULL)
info_msg (_("cannot find script file %s\n"), buff);
else
info_msg (_("opened script file %s\n"), buff);
}
free (buff);
}
return result;
}
static bfd_boolean
check_for_scripts_dir (char *dir)
{
char *buf;
struct stat s;
bfd_boolean res;
buf = concat (dir, "/ldscripts", (const char *) NULL);
res = stat (buf, &s) == 0 && S_ISDIR (s.st_mode);
free (buf);
return res;
}
We look for the "ldscripts" directory in:
SCRIPTDIR (passed from Makefile)
(adjusted according to the current location of the binary)
the dir where this program is (for using it from the build tree). */
static char *
find_scripts_dir (void)
{
char *dir;
dir = make_relative_prefix (program_name, BINDIR, SCRIPTDIR);
if (dir)
{
if (check_for_scripts_dir (dir))
return dir;
free (dir);
}
dir = make_relative_prefix (program_name, TOOLBINDIR, SCRIPTDIR);
if (dir)
{
if (check_for_scripts_dir (dir))
return dir;
free (dir);
}
dir = make_relative_prefix (program_name, ".", ".");
if (dir)
{
if (check_for_scripts_dir (dir))
return dir;
free (dir);
}
return NULL;
}
it in directories specified with -L, then in the default script
directory, without and with EXTEND appended. If DEFAULT_ONLY is
true, the search is restricted to the default script location. */
static FILE *
ldfile_find_command_file (const char *name, const char *extend,
bfd_boolean default_only)
{
search_dirs_type *search;
FILE *result = NULL;
char *buffer;
static search_dirs_type *script_search;
if (!default_only)
{
result = try_open (name, "");
if (result != NULL)
return result;
}
if (!script_search)
{
char *script_dir = find_scripts_dir ();
if (script_dir)
{
search_dirs_type **save_tail_ptr = search_tail_ptr;
search_tail_ptr = &script_search;
ldfile_add_library_path (script_dir, TRUE);
search_tail_ptr = save_tail_ptr;
}
}
paths specified with -L will be searched first. */
*search_tail_ptr = script_search;
for (search = default_only ? script_search : search_head;
search != NULL;
search = search->next)
{
buffer = concat (search->name, slash, name, (const char *) NULL);
result = try_open (buffer, extend);
free (buffer);
if (result)
break;
}
*search_tail_ptr = NULL;
return result;
}
static void
ldfile_open_command_file_1 (const char *name, bfd_boolean default_only)
{
FILE *ldlex_input_stack;
ldlex_input_stack = ldfile_find_command_file (name, "", default_only);
if (ldlex_input_stack == NULL)
{
bfd_set_error (bfd_error_system_call);
einfo (_("%P%F: cannot open linker script file %s: %E\n"), name);
}
lex_push_file (ldlex_input_stack, name);
ldfile_input_filename = name;
lineno = 1;
saved_script_handle = ldlex_input_stack;
}
the default script location, in that order. */
void
ldfile_open_command_file (const char *name)
{
ldfile_open_command_file_1 (name, FALSE);
}
void
ldfile_open_default_command_file (const char *name)
{
ldfile_open_command_file_1 (name, TRUE);
}
void
ldfile_add_arch (const char *in_name)
{
char *name = xstrdup (in_name);
search_arch_type *new_arch = (search_arch_type *)
xmalloc (sizeof (search_arch_type));
ldfile_output_machine_name = in_name;
new_arch->name = name;
new_arch->next = NULL;
while (*name)
{
*name = TOLOWER (*name);
name++;
}
*search_arch_tail_ptr = new_arch;
search_arch_tail_ptr = &new_arch->next;
}
void
ldfile_set_output_arch (const char *string, enum bfd_architecture defarch)
{
const bfd_arch_info_type *arch = bfd_scan_arch (string);
if (arch)
{
ldfile_output_architecture = arch->arch;
ldfile_output_machine = arch->mach;
ldfile_output_machine_name = arch->printable_name;
}
else if (defarch != bfd_arch_unknown)
ldfile_output_architecture = defarch;
else
einfo (_("%P%F: cannot represent machine `%s'\n"), string);
}
