cd6f1cf350
* ldmain.c (trace_file_tries): Rename to 'verbose'. * ldfile.c: Likewise. * ldlang.c: Likewise. * ldmain.h: Likewise. * lexsup.c: Likewise. * emultempl/elf32.em: Likewise. * emultemp/spuelf.em: Likewise. * pe-dll.c (pe_dll_generate_implib): Only print creation message in verbose mode.
669 lines
17 KiB
C
669 lines
17 KiB
C
/* Linker file opening and searching.
|
|
Copyright 1991, 1992, 1993, 1994, 1995, 1998, 1999, 2000, 2001, 2002,
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2003, 2004, 2005, 2007, 2008, 2009, 2010, 2011, 2012
|
|
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.
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|
|
|
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. */
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|
|
|
#include "sysdep.h"
|
|
#include "bfd.h"
|
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#include "bfdlink.h"
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#include "safe-ctype.h"
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#include "ld.h"
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#include "ldmisc.h"
|
|
#include "ldexp.h"
|
|
#include "ldlang.h"
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|
#include "ldfile.h"
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#include "ldmain.h"
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#include <ldgram.h>
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|
#include "ldlex.h"
|
|
#include "ldemul.h"
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|
#include "libiberty.h"
|
|
#include "filenames.h"
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|
#ifdef ENABLE_PLUGINS
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|
#include "plugin-api.h"
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|
#include "plugin.h"
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#endif /* ENABLE_PLUGINS */
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|
|
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bfd_boolean ldfile_assumed_script = FALSE;
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const char * ldfile_output_machine_name = "";
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unsigned long ldfile_output_machine;
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enum bfd_architecture ldfile_output_architecture;
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search_dirs_type * search_head;
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|
|
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#ifdef VMS
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static char * slash = "";
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#else
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#if defined (_WIN32) && ! defined (__CYGWIN32__)
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static char * slash = "\\";
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#else
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static char * slash = "/";
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|
#endif
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|
#endif
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|
|
|
typedef struct search_arch
|
|
{
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char *name;
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|
struct search_arch *next;
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} search_arch_type;
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|
|
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static search_dirs_type **search_tail_ptr = &search_head;
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|
static search_arch_type *search_arch_head;
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static search_arch_type **search_arch_tail_ptr = &search_arch_head;
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|
|
|
/* Test whether a pathname, after canonicalization, is the same or a
|
|
sub-directory of the sysroot directory. */
|
|
|
|
static bfd_boolean
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is_sysrooted_pathname (const char *name)
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|
{
|
|
char *realname;
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|
int len;
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bfd_boolean result;
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|
|
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if (ld_canon_sysroot == NULL)
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return FALSE;
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|
|
|
realname = lrealpath (name);
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|
len = strlen (realname);
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result = FALSE;
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if (len > ld_canon_sysroot_len
|
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&& IS_DIR_SEPARATOR (realname[ld_canon_sysroot_len]))
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{
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|
realname[ld_canon_sysroot_len] = '\0';
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result = FILENAME_CMP (ld_canon_sysroot, realname) == 0;
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}
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|
|
free (realname);
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return result;
|
|
}
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|
|
|
/* Adds NAME to the library search path.
|
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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)
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|
return;
|
|
|
|
new_dirs = (search_dirs_type *) xmalloc (sizeof (search_dirs_type));
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|
new_dirs->next = NULL;
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|
new_dirs->cmdline = cmdline;
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|
*search_tail_ptr = new_dirs;
|
|
search_tail_ptr = &new_dirs->next;
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|
|
|
/* If a directory is marked as honoring sysroot, prepend the sysroot path
|
|
now. */
|
|
if (name[0] == '=')
|
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new_dirs->name = concat (ld_sysroot, name + 1, (const char *) NULL);
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|
else
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|
new_dirs->name = xstrdup (name);
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|
}
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|
|
|
/* Try to open a BFD for a lang_input_statement. */
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|
|
|
bfd_boolean
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ldfile_try_open_bfd (const char *attempt,
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lang_input_statement_type *entry)
|
|
{
|
|
entry->the_bfd = bfd_openr (attempt, entry->target);
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|
|
|
if (verbose)
|
|
{
|
|
if (entry->the_bfd == NULL)
|
|
info_msg (_("attempt to open %s failed\n"), attempt);
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|
else
|
|
info_msg (_("attempt to open %s succeeded\n"), attempt);
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|
}
|
|
|
|
if (entry->the_bfd == NULL)
|
|
{
|
|
if (bfd_get_error () == bfd_error_invalid_target)
|
|
einfo (_("%F%P: invalid BFD target `%s'\n"), entry->target);
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|
return FALSE;
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|
}
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|
|
|
/* Linker needs to decompress sections. */
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|
entry->the_bfd->flags |= BFD_DECOMPRESS;
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|
|
/* If we are searching for this file, see if the architecture is
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compatible with the output file. If it isn't, keep searching.
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|
If we can't open the file as an object file, stop the search
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|
here. If we are statically linking, ensure that we don't link
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|
a dynamic object.
|
|
|
|
In the code below, it's OK to exit early if the check fails,
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|
closing the checked BFD and returning FALSE, but if the BFD
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|
checks out compatible, do not exit early returning TRUE, or
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|
the plugins will not get a chance to claim the file. */
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|
|
|
if (entry->flags.search_dirs || !entry->flags.dynamic)
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|
{
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|
bfd *check;
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|
if (bfd_check_format (entry->the_bfd, bfd_archive))
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check = bfd_openr_next_archived_file (entry->the_bfd, NULL);
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|
else
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check = entry->the_bfd;
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|
|
if (check != NULL)
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|
{
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|
if (! bfd_check_format (check, bfd_object))
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|
{
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|
if (check == entry->the_bfd
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&& entry->flags.search_dirs
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&& bfd_get_error () == bfd_error_file_not_recognized
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|
&& ! ldemul_unrecognized_file (entry))
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|
{
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|
int token, skip = 0;
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char *arg, *arg1, *arg2, *arg3;
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extern FILE *yyin;
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/* Try to interpret the file as a linker script. */
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ldfile_open_command_file (attempt);
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ldfile_assumed_script = TRUE;
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parser_input = input_selected;
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ldlex_both ();
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token = INPUT_SCRIPT;
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while (token != 0)
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{
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switch (token)
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{
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|
case OUTPUT_FORMAT:
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|
if ((token = yylex ()) != '(')
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continue;
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if ((token = yylex ()) != NAME)
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continue;
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arg1 = yylval.name;
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arg2 = NULL;
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arg3 = NULL;
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token = yylex ();
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if (token == ',')
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|
{
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if ((token = yylex ()) != NAME)
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{
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free (arg1);
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continue;
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}
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arg2 = yylval.name;
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if ((token = yylex ()) != ','
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|| (token = yylex ()) != NAME)
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|
{
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|
free (arg1);
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|
free (arg2);
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continue;
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|
}
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arg3 = yylval.name;
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token = yylex ();
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}
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if (token == ')')
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{
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switch (command_line.endian)
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{
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default:
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case ENDIAN_UNSET:
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arg = arg1; break;
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case ENDIAN_BIG:
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arg = arg2 ? arg2 : arg1; break;
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case ENDIAN_LITTLE:
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arg = arg3 ? arg3 : arg1; break;
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}
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if (strcmp (arg, lang_get_output_target ()) != 0)
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skip = 1;
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}
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free (arg1);
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if (arg2) free (arg2);
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if (arg3) free (arg3);
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break;
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case NAME:
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case LNAME:
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case VERS_IDENTIFIER:
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case VERS_TAG:
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free (yylval.name);
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break;
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case INT:
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if (yylval.bigint.str)
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free (yylval.bigint.str);
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break;
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}
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token = yylex ();
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}
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ldlex_popstate ();
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ldfile_assumed_script = FALSE;
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fclose (yyin);
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yyin = NULL;
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if (skip)
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{
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if (command_line.warn_search_mismatch)
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einfo (_("%P: skipping incompatible %s "
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|
"when searching for %s\n"),
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attempt, entry->local_sym_name);
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bfd_close (entry->the_bfd);
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|
entry->the_bfd = NULL;
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|
return FALSE;
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|
}
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|
}
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goto success;
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|
}
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|
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|
if (!entry->flags.dynamic && (entry->the_bfd->flags & DYNAMIC) != 0)
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|
{
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einfo (_("%F%P: attempted static link of dynamic object `%s'\n"),
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|
attempt);
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|
bfd_close (entry->the_bfd);
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|
entry->the_bfd = NULL;
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|
return FALSE;
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|
}
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|
|
|
if (entry->flags.search_dirs
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&& !bfd_arch_get_compatible (check, link_info.output_bfd,
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command_line.accept_unknown_input_arch)
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|
/* XCOFF archives can have 32 and 64 bit objects. */
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|
&& ! (bfd_get_flavour (check) == bfd_target_xcoff_flavour
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|
&& 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"),
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|
attempt, entry->local_sym_name);
|
|
bfd_close (entry->the_bfd);
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|
entry->the_bfd = NULL;
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|
return FALSE;
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|
}
|
|
}
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|
}
|
|
success:
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|
#ifdef ENABLE_PLUGINS
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|
/* If plugins are active, they get first chance to claim
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|
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 /* ENABLE_PLUGINS */
|
|
|
|
/* It opened OK, the format checked out, and the plugins have had
|
|
their chance to claim it, so this is success. */
|
|
return TRUE;
|
|
}
|
|
|
|
/* Search for and open the file specified by ENTRY. If it is an
|
|
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;
|
|
|
|
/* If this is not an archive, try to open it in the current
|
|
directory first. */
|
|
if (! entry->flags.maybe_archive)
|
|
{
|
|
if (entry->flags.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))
|
|
return TRUE;
|
|
|
|
if (IS_ABSOLUTE_PATH (entry->filename))
|
|
return FALSE;
|
|
}
|
|
|
|
for (search = search_head; search != NULL; search = search->next)
|
|
{
|
|
char *string;
|
|
|
|
if (entry->flags.dynamic && ! link_info.relocatable)
|
|
{
|
|
if (ldemul_open_dynamic_archive (arch, search, entry))
|
|
return TRUE;
|
|
}
|
|
|
|
if (entry->flags.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;
|
|
return TRUE;
|
|
}
|
|
|
|
free (string);
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
/* Open the input file specified by ENTRY.
|
|
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->flags.search_dirs)
|
|
{
|
|
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->flags.missing_file = TRUE;
|
|
input_flags.missing_file = TRUE;
|
|
}
|
|
else
|
|
{
|
|
search_arch_type *arch;
|
|
bfd_boolean found = FALSE;
|
|
|
|
/* Try to open <filename><suffix> or lib<filename><suffix>.a */
|
|
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;
|
|
}
|
|
|
|
/* If we have found the file, we don't need to search directories
|
|
again. */
|
|
if (found)
|
|
entry->flags.search_dirs = FALSE;
|
|
else
|
|
{
|
|
if (entry->flags.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->flags.missing_file = TRUE;
|
|
input_flags.missing_file = TRUE;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Try to open NAME. */
|
|
|
|
static FILE *
|
|
try_open (const char *name, bfd_boolean *sysrooted)
|
|
{
|
|
FILE *result;
|
|
|
|
result = fopen (name, "r");
|
|
|
|
if (result != NULL)
|
|
*sysrooted = is_sysrooted_pathname (name);
|
|
|
|
if (verbose)
|
|
{
|
|
if (result == NULL)
|
|
info_msg (_("cannot find script file %s\n"), name);
|
|
else
|
|
info_msg (_("opened script file %s\n"), name);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/* Return TRUE iff directory DIR contains an "ldscripts" subdirectory. */
|
|
|
|
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;
|
|
}
|
|
|
|
/* Return the default directory for finding script files.
|
|
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);
|
|
}
|
|
|
|
/* Look for "ldscripts" in the dir where our binary is. */
|
|
dir = make_relative_prefix (program_name, ".", ".");
|
|
if (dir)
|
|
{
|
|
if (check_for_scripts_dir (dir))
|
|
return dir;
|
|
free (dir);
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* If DEFAULT_ONLY is false, try to open NAME; if that fails, look for
|
|
it in directories specified with -L, then in the default script
|
|
directory. If DEFAULT_ONLY is true, the search is restricted to
|
|
the default script location. */
|
|
|
|
static FILE *
|
|
ldfile_find_command_file (const char *name,
|
|
bfd_boolean default_only,
|
|
bfd_boolean *sysrooted)
|
|
{
|
|
search_dirs_type *search;
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|
FILE *result = NULL;
|
|
char *path;
|
|
static search_dirs_type *script_search;
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|
|
|
if (!default_only)
|
|
{
|
|
/* First try raw name. */
|
|
result = try_open (name, sysrooted);
|
|
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;
|
|
}
|
|
}
|
|
|
|
/* Temporarily append script_search to the path list so that the
|
|
paths specified with -L will be searched first. */
|
|
*search_tail_ptr = script_search;
|
|
|
|
/* Try now prefixes. */
|
|
for (search = default_only ? script_search : search_head;
|
|
search != NULL;
|
|
search = search->next)
|
|
{
|
|
path = concat (search->name, slash, name, (const char *) NULL);
|
|
result = try_open (path, sysrooted);
|
|
free (path);
|
|
if (result)
|
|
break;
|
|
}
|
|
|
|
/* Restore the original path list. */
|
|
*search_tail_ptr = NULL;
|
|
|
|
return result;
|
|
}
|
|
|
|
/* Open command file NAME. */
|
|
|
|
static void
|
|
ldfile_open_command_file_1 (const char *name, bfd_boolean default_only)
|
|
{
|
|
FILE *ldlex_input_stack;
|
|
bfd_boolean sysrooted;
|
|
|
|
ldlex_input_stack = ldfile_find_command_file (name, default_only, &sysrooted);
|
|
|
|
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, sysrooted);
|
|
|
|
lineno = 1;
|
|
|
|
saved_script_handle = ldlex_input_stack;
|
|
}
|
|
|
|
/* Open command file NAME in the current directory, -L directories,
|
|
the default script location, in that order. */
|
|
|
|
void
|
|
ldfile_open_command_file (const char *name)
|
|
{
|
|
ldfile_open_command_file_1 (name, FALSE);
|
|
}
|
|
|
|
/* Open command file NAME at the default script location. */
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
/* Set the output architecture. */
|
|
|
|
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);
|
|
}
|