/* Linker file opening and searching. Copyright 1991, 1992, 1993, 1994, 1995, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007 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" 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; /* Test whether a pathname, after canonicalization, is the same or a 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; } /* Adds NAME to the library search path. Makes a copy of NAME using xmalloc(). */ void ldfile_add_library_path (const char *name, bfd_boolean cmdline) { search_dirs_type *new; if (!cmdline && config.only_cmd_line_lib_dirs) return; new = xmalloc (sizeof (search_dirs_type)); new->next = NULL; new->cmdline = cmdline; *search_tail_ptr = new; search_tail_ptr = &new->next; /* If a directory is marked as honoring sysroot, prepend the sysroot path now. */ if (name[0] == '=') { new->name = concat (ld_sysroot, name + 1, NULL); new->sysrooted = TRUE; } else { new->name = xstrdup (name); new->sysrooted = is_sysrooted_pathname (name, FALSE); } } /* Try to open a BFD for a lang_input_statement. */ 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; } /* If we are searching for this file, see if the architecture is 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. */ 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; /* Try to interpret the file as a linker script. */ 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; } } return TRUE; } 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, output_bfd, command_line.accept_unknown_input_arch) /* XCOFF archives can have 32 and 64 bit objects. */ && ! (bfd_get_flavour (check) == bfd_target_xcoff_flavour && bfd_get_flavour (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; } } } 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->is_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; } } string = xmalloc (strlen (search->name) + strlen (slash) + strlen (lib) + strlen (entry->filename) + strlen (arch) + strlen (suffix) + 1); if (entry->is_archive) sprintf (string, "%s%s%s%s%s%s", search->name, slash, lib, entry->filename, arch, suffix); else sprintf (string, "%s%s%s", search->name, slash, entry->filename); if (ldfile_try_open_bfd (string, entry)) { entry->filename = string; entry->sysrooted = search->sysrooted; return TRUE; } free (string); } return FALSE; } /* Open the input file specified by ENTRY. */ 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 (strcmp (entry->filename, entry->local_sym_name) != 0) einfo (_("%F%P: %s (%s): No such file: %E\n"), entry->filename, entry->local_sym_name); else einfo (_("%F%P: %s: No such file: %E\n"), entry->local_sym_name); } 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->search_dirs_flag = FALSE; else if (entry->sysrooted && ld_sysroot && IS_ABSOLUTE_PATH (entry->local_sym_name)) einfo (_("%F%P: cannot find %s inside %s\n"), entry->local_sym_name, ld_sysroot); else einfo (_("%F%P: cannot find %s\n"), entry->local_sym_name); } } /* Try to open NAME; if that fails, try NAME with EXTEN appended to it. */ static FILE * try_open (const char *name, const char *exten) { FILE *result; char buff[1000]; 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) { sprintf (buff, "%s%s", name, exten); 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); } } return result; } /* Try to open NAME; if that fails, look for it in any directories specified with -L, without and with EXTEND appended. */ static FILE * ldfile_find_command_file (const char *name, const char *extend) { search_dirs_type *search; FILE *result; char buffer[1000]; /* First try raw name. */ result = try_open (name, ""); if (result == NULL) { /* Try now prefixes. */ for (search = search_head; search != NULL; search = search->next) { sprintf (buffer, "%s%s%s", search->name, slash, name); result = try_open (buffer, extend); if (result) break; } } return result; } void ldfile_open_command_file (const char *name) { FILE *ldlex_input_stack; ldlex_input_stack = ldfile_find_command_file (name, ""); 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; } void ldfile_add_arch (const char *in_name) { char *name = xstrdup (in_name); search_arch_type *new = xmalloc (sizeof (search_arch_type)); ldfile_output_machine_name = in_name; new->name = name; new->next = NULL; while (*name) { *name = TOLOWER (*name); name++; } *search_arch_tail_ptr = new; search_arch_tail_ptr = &new->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); }