447 lines
10 KiB
C
447 lines
10 KiB
C
/* Linker file opening and searching.
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Copyright (C) 1991, 92, 93, 94, 95, 98, 99, 2000
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Free Software Foundation, Inc.
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This file is part of GLD, the Gnu Linker.
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GLD is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GLD is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GLD; see the file COPYING. If not, write to the Free
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Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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02111-1307, USA. */
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/*
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ldfile.c
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look after all the file stuff
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*/
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#include "bfd.h"
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#include "sysdep.h"
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#include "bfdlink.h"
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#include "ld.h"
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#include "ldmisc.h"
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#include "ldexp.h"
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#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"
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#include "ldemul.h"
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#include <ctype.h>
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const char *ldfile_input_filename;
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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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#ifndef MPW
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#ifdef VMS
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char *slash = "";
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#else
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#if defined (_WIN32) && ! defined (__CYGWIN32__)
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char *slash = "\\";
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#else
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char *slash = "/";
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#endif
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#endif
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#else /* MPW */
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/* The MPW path char is a colon. */
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char *slash = ":";
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#endif /* MPW */
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/* LOCAL */
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static search_dirs_type **search_tail_ptr = &search_head;
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typedef struct search_arch
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{
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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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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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static FILE *try_open PARAMS ((const char *name, const char *exten));
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void
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ldfile_add_library_path (name, cmdline)
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const char *name;
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boolean cmdline;
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{
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search_dirs_type *new;
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new = (search_dirs_type *) xmalloc (sizeof (search_dirs_type));
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new->next = NULL;
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new->name = name;
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new->cmdline = cmdline;
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*search_tail_ptr = new;
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search_tail_ptr = &new->next;
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}
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/* Try to open a BFD for a lang_input_statement. */
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boolean
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ldfile_try_open_bfd (attempt, entry)
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const char *attempt;
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lang_input_statement_type *entry;
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{
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entry->the_bfd = bfd_openr (attempt, entry->target);
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if (trace_file_tries)
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{
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if (entry->the_bfd == NULL)
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info_msg (_("attempt to open %s failed\n"), attempt);
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else
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info_msg (_("attempt to open %s succeeded\n"), attempt);
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}
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if (entry->the_bfd == NULL)
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{
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if (bfd_get_error () == bfd_error_invalid_target)
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einfo (_("%F%P: invalid BFD target `%s'\n"), entry->target);
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return false;
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}
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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. */
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if (entry->search_dirs_flag)
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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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return true;
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if (bfd_arch_get_compatible (check, output_bfd) == NULL)
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{
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einfo (_("%P: skipping incompatible %s when searching for %s"),
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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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}
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return true;
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}
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/* Search for and open the file specified by ENTRY. If it is an
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archive, use ARCH, LIB and SUFFIX to modify the file name. */
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boolean
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ldfile_open_file_search (arch, entry, lib, suffix)
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const char *arch;
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lang_input_statement_type *entry;
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const char *lib;
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const char *suffix;
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{
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search_dirs_type *search;
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/* If this is not an archive, try to open it in the current
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directory first. */
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if (! entry->is_archive)
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{
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if (ldfile_try_open_bfd (entry->filename, entry))
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return true;
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}
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for (search = search_head;
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search != (search_dirs_type *)NULL;
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search = search->next)
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{
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char *string;
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if (entry->dynamic && ! link_info.relocateable)
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{
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if (ldemul_open_dynamic_archive (arch, search, entry))
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return true;
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}
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string = (char *) xmalloc (strlen (search->name)
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+ strlen (slash)
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+ strlen (lib)
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+ strlen (entry->filename)
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+ strlen (arch)
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+ strlen (suffix)
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+ 1);
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if (entry->is_archive)
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sprintf (string, "%s%s%s%s%s%s", search->name, slash,
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lib, entry->filename, arch, suffix);
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else if (entry->filename[0] == '/' || entry->filename[0] == '.'
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#if defined (__MSDOS__) || defined (_WIN32)
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|| entry->filename[0] == '\\'
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|| (isalpha (entry->filename[0])
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&& entry->filename[1] == ':')
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#endif
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)
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strcpy (string, entry->filename);
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else
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sprintf (string, "%s%s%s", search->name, slash, entry->filename);
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if (ldfile_try_open_bfd (string, entry))
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{
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entry->filename = string;
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return true;
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}
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free (string);
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}
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return false;
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}
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/* Open the input file specified by ENTRY. */
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void
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ldfile_open_file (entry)
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lang_input_statement_type *entry;
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{
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if (entry->the_bfd != NULL)
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return;
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if (! entry->search_dirs_flag)
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{
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if (ldfile_try_open_bfd (entry->filename, entry))
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return;
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if (strcmp (entry->filename, entry->local_sym_name) != 0)
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einfo (_("%F%P: cannot open %s for %s: %E\n"),
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entry->filename, entry->local_sym_name);
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else
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einfo(_("%F%P: cannot open %s: %E\n"), entry->local_sym_name);
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}
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else
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{
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search_arch_type *arch;
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/* Try to open <filename><suffix> or lib<filename><suffix>.a */
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for (arch = search_arch_head;
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arch != (search_arch_type *) NULL;
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arch = arch->next)
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{
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if (ldfile_open_file_search (arch->name, entry, "lib", ".a"))
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return;
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#ifdef VMS
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if (ldfile_open_file_search (arch->name, entry, ":lib", ".a"))
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return;
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#endif
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if (ldemul_find_potential_libraries (arch->name, entry))
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return;
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}
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einfo (_("%F%P: cannot find %s\n"), entry->local_sym_name);
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}
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}
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/* Try to open NAME; if that fails, try NAME with EXTEN appended to it. */
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static FILE *
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try_open (name, exten)
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const char *name;
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const char *exten;
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{
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FILE *result;
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char buff[1000];
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result = fopen (name, "r");
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if (trace_file_tries)
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{
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if (result == NULL)
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info_msg (_("cannot find script file %s\n"), name);
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else
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info_msg (_("opened script file %s\n"), name);
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}
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if (result != NULL)
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return result;
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if (*exten)
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{
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sprintf (buff, "%s%s", name, exten);
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result = fopen (buff, "r");
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if (trace_file_tries)
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{
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if (result == NULL)
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info_msg (_("cannot find script file %s\n"), buff);
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else
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info_msg (_("opened script file %s\n"), buff);
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}
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}
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return result;
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}
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/* Try to open NAME; if that fails, look for it in any directories
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specified with -L, without and with EXTEND apppended. */
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FILE *
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ldfile_find_command_file (name, extend)
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const char *name;
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const char *extend;
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{
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search_dirs_type *search;
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FILE *result;
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char buffer[1000];
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/* First try raw name */
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result = try_open(name,"");
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if (result == (FILE *)NULL) {
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/* Try now prefixes */
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for (search = search_head;
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search != (search_dirs_type *)NULL;
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search = search->next) {
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sprintf(buffer,"%s%s%s", search->name, slash, name);
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result = try_open(buffer, extend);
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if (result)break;
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}
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}
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return result;
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}
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void
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ldfile_open_command_file (name)
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const char *name;
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{
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FILE *ldlex_input_stack;
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ldlex_input_stack = ldfile_find_command_file(name, "");
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if (ldlex_input_stack == (FILE *)NULL) {
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bfd_set_error (bfd_error_system_call);
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einfo(_("%P%F: cannot open linker script file %s: %E\n"),name);
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}
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lex_push_file(ldlex_input_stack, name);
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ldfile_input_filename = name;
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lineno = 1;
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had_script = true;
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}
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#ifdef GNU960
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static
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char *
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gnu960_map_archname( name )
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char *name;
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{
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struct tabentry { char *cmd_switch; char *arch; };
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static struct tabentry arch_tab[] = {
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"", "",
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"KA", "ka",
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"KB", "kb",
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"KC", "mc", /* Synonym for MC */
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"MC", "mc",
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"CA", "ca",
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"SA", "ka", /* Functionally equivalent to KA */
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"SB", "kb", /* Functionally equivalent to KB */
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NULL, ""
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};
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struct tabentry *tp;
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for ( tp = arch_tab; tp->cmd_switch != NULL; tp++ ){
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if ( !strcmp(name,tp->cmd_switch) ){
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break;
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}
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}
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if ( tp->cmd_switch == NULL ){
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einfo(_("%P%F: unknown architecture: %s\n"),name);
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}
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return tp->arch;
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}
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void
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ldfile_add_arch(name)
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char *name;
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{
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search_arch_type *new =
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(search_arch_type *)xmalloc((bfd_size_type)(sizeof(search_arch_type)));
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if (*name != '\0') {
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if (ldfile_output_machine_name[0] != '\0') {
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einfo(_("%P%F: target architecture respecified\n"));
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return;
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}
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ldfile_output_machine_name = name;
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}
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new->next = (search_arch_type*)NULL;
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new->name = gnu960_map_archname( name );
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*search_arch_tail_ptr = new;
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search_arch_tail_ptr = &new->next;
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}
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#else /* not GNU960 */
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void
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ldfile_add_arch (in_name)
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CONST char * in_name;
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{
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char *name = buystring(in_name);
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search_arch_type *new =
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(search_arch_type *) xmalloc (sizeof (search_arch_type));
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ldfile_output_machine_name = in_name;
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new->name = name;
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new->next = (search_arch_type*)NULL;
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while (*name)
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{
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if (isupper ((unsigned char) *name))
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*name = tolower ((unsigned char) *name);
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name++;
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}
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*search_arch_tail_ptr = new;
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search_arch_tail_ptr = &new->next;
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}
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#endif
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/* Set the output architecture */
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void
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ldfile_set_output_arch (string)
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CONST char *string;
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{
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const bfd_arch_info_type *arch = bfd_scan_arch(string);
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if (arch) {
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ldfile_output_architecture = arch->arch;
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ldfile_output_machine = arch->mach;
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ldfile_output_machine_name = arch->printable_name;
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}
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else {
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einfo(_("%P%F: cannot represent machine `%s'\n"), string);
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}
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}
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