| 1 | /* Linker file opening and searching. |
| 2 | Copyright (C) 1991, 92, 93, 94, 95, 98, 99, 2000 |
| 3 | Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GLD, the Gnu Linker. |
| 6 | |
| 7 | GLD is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2, or (at your option) |
| 10 | any later version. |
| 11 | |
| 12 | GLD is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with GLD; see the file COPYING. If not, write to the Free |
| 19 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
| 20 | 02111-1307, USA. */ |
| 21 | |
| 22 | /* ldfile.c: look after all the file stuff. */ |
| 23 | |
| 24 | #include "bfd.h" |
| 25 | #include "sysdep.h" |
| 26 | #include "bfdlink.h" |
| 27 | #include "ld.h" |
| 28 | #include "ldmisc.h" |
| 29 | #include "ldexp.h" |
| 30 | #include "ldlang.h" |
| 31 | #include "ldfile.h" |
| 32 | #include "ldmain.h" |
| 33 | #include "ldgram.h" |
| 34 | #include "ldlex.h" |
| 35 | #include "ldemul.h" |
| 36 | |
| 37 | #include <ctype.h> |
| 38 | |
| 39 | const char *ldfile_input_filename; |
| 40 | boolean ldfile_assumed_script = false; |
| 41 | const char *ldfile_output_machine_name = ""; |
| 42 | unsigned long ldfile_output_machine; |
| 43 | enum bfd_architecture ldfile_output_architecture; |
| 44 | search_dirs_type *search_head; |
| 45 | |
| 46 | #ifndef MPW |
| 47 | #ifdef VMS |
| 48 | char *slash = ""; |
| 49 | #else |
| 50 | #if defined (_WIN32) && ! defined (__CYGWIN32__) |
| 51 | char *slash = "\\"; |
| 52 | #else |
| 53 | char *slash = "/"; |
| 54 | #endif |
| 55 | #endif |
| 56 | #else /* MPW */ |
| 57 | /* The MPW path char is a colon. */ |
| 58 | char *slash = ":"; |
| 59 | #endif /* MPW */ |
| 60 | |
| 61 | /* LOCAL */ |
| 62 | |
| 63 | static search_dirs_type **search_tail_ptr = &search_head; |
| 64 | |
| 65 | typedef struct search_arch { |
| 66 | char *name; |
| 67 | struct search_arch *next; |
| 68 | } search_arch_type; |
| 69 | |
| 70 | static search_arch_type *search_arch_head; |
| 71 | static search_arch_type **search_arch_tail_ptr = &search_arch_head; |
| 72 | |
| 73 | static FILE *try_open PARAMS ((const char *name, const char *exten)); |
| 74 | |
| 75 | void |
| 76 | ldfile_add_library_path (name, cmdline) |
| 77 | const char *name; |
| 78 | boolean cmdline; |
| 79 | { |
| 80 | search_dirs_type *new; |
| 81 | |
| 82 | new = (search_dirs_type *) xmalloc (sizeof (search_dirs_type)); |
| 83 | new->next = NULL; |
| 84 | new->name = name; |
| 85 | new->cmdline = cmdline; |
| 86 | *search_tail_ptr = new; |
| 87 | search_tail_ptr = &new->next; |
| 88 | } |
| 89 | |
| 90 | /* Try to open a BFD for a lang_input_statement. */ |
| 91 | |
| 92 | boolean |
| 93 | ldfile_try_open_bfd (attempt, entry) |
| 94 | const char *attempt; |
| 95 | lang_input_statement_type *entry; |
| 96 | { |
| 97 | entry->the_bfd = bfd_openr (attempt, entry->target); |
| 98 | |
| 99 | if (trace_file_tries) |
| 100 | { |
| 101 | if (entry->the_bfd == NULL) |
| 102 | info_msg (_("attempt to open %s failed\n"), attempt); |
| 103 | else |
| 104 | info_msg (_("attempt to open %s succeeded\n"), attempt); |
| 105 | } |
| 106 | |
| 107 | if (entry->the_bfd == NULL) |
| 108 | { |
| 109 | if (bfd_get_error () == bfd_error_invalid_target) |
| 110 | einfo (_("%F%P: invalid BFD target `%s'\n"), entry->target); |
| 111 | return false; |
| 112 | } |
| 113 | |
| 114 | /* If we are searching for this file, see if the architecture is |
| 115 | compatible with the output file. If it isn't, keep searching. |
| 116 | If we can't open the file as an object file, stop the search |
| 117 | here. */ |
| 118 | |
| 119 | if (entry->search_dirs_flag) |
| 120 | { |
| 121 | bfd *check; |
| 122 | |
| 123 | if (bfd_check_format (entry->the_bfd, bfd_archive)) |
| 124 | check = bfd_openr_next_archived_file (entry->the_bfd, NULL); |
| 125 | else |
| 126 | check = entry->the_bfd; |
| 127 | |
| 128 | if (check != NULL) |
| 129 | { |
| 130 | if (! bfd_check_format (check, bfd_object)) |
| 131 | return true; |
| 132 | if (bfd_arch_get_compatible (check, output_bfd) == NULL) |
| 133 | { |
| 134 | einfo (_("%P: skipping incompatible %s when searching for %s\n"), |
| 135 | attempt, entry->local_sym_name); |
| 136 | bfd_close (entry->the_bfd); |
| 137 | entry->the_bfd = NULL; |
| 138 | return false; |
| 139 | } |
| 140 | } |
| 141 | } |
| 142 | |
| 143 | return true; |
| 144 | } |
| 145 | |
| 146 | /* Search for and open the file specified by ENTRY. If it is an |
| 147 | archive, use ARCH, LIB and SUFFIX to modify the file name. */ |
| 148 | |
| 149 | boolean |
| 150 | ldfile_open_file_search (arch, entry, lib, suffix) |
| 151 | const char *arch; |
| 152 | lang_input_statement_type *entry; |
| 153 | const char *lib; |
| 154 | const char *suffix; |
| 155 | { |
| 156 | search_dirs_type *search; |
| 157 | |
| 158 | /* If this is not an archive, try to open it in the current |
| 159 | directory first. */ |
| 160 | if (! entry->is_archive) |
| 161 | { |
| 162 | if (ldfile_try_open_bfd (entry->filename, entry)) |
| 163 | return true; |
| 164 | } |
| 165 | |
| 166 | for (search = search_head; |
| 167 | search != (search_dirs_type *) NULL; |
| 168 | search = search->next) |
| 169 | { |
| 170 | char *string; |
| 171 | |
| 172 | if (entry->dynamic && ! link_info.relocateable) |
| 173 | { |
| 174 | if (ldemul_open_dynamic_archive (arch, search, entry)) |
| 175 | return true; |
| 176 | } |
| 177 | |
| 178 | string = (char *) xmalloc (strlen (search->name) |
| 179 | + strlen (slash) |
| 180 | + strlen (lib) |
| 181 | + strlen (entry->filename) |
| 182 | + strlen (arch) |
| 183 | + strlen (suffix) |
| 184 | + 1); |
| 185 | |
| 186 | if (entry->is_archive) |
| 187 | sprintf (string, "%s%s%s%s%s%s", search->name, slash, |
| 188 | lib, entry->filename, arch, suffix); |
| 189 | else if (entry->filename[0] == '/' || entry->filename[0] == '.' |
| 190 | #if defined (__MSDOS__) || defined (_WIN32) |
| 191 | || entry->filename[0] == '\\' |
| 192 | || (isalpha (entry->filename[0]) |
| 193 | && entry->filename[1] == ':') |
| 194 | #endif |
| 195 | ) |
| 196 | strcpy (string, entry->filename); |
| 197 | else |
| 198 | sprintf (string, "%s%s%s", search->name, slash, entry->filename); |
| 199 | |
| 200 | if (ldfile_try_open_bfd (string, entry)) |
| 201 | { |
| 202 | entry->filename = string; |
| 203 | return true; |
| 204 | } |
| 205 | |
| 206 | free (string); |
| 207 | } |
| 208 | |
| 209 | return false; |
| 210 | } |
| 211 | |
| 212 | /* Open the input file specified by ENTRY. */ |
| 213 | |
| 214 | void |
| 215 | ldfile_open_file (entry) |
| 216 | lang_input_statement_type *entry; |
| 217 | { |
| 218 | if (entry->the_bfd != NULL) |
| 219 | return; |
| 220 | |
| 221 | if (! entry->search_dirs_flag) |
| 222 | { |
| 223 | if (ldfile_try_open_bfd (entry->filename, entry)) |
| 224 | return; |
| 225 | if (strcmp (entry->filename, entry->local_sym_name) != 0) |
| 226 | einfo (_("%F%P: cannot open %s for %s: %E\n"), |
| 227 | entry->filename, entry->local_sym_name); |
| 228 | else |
| 229 | einfo (_("%F%P: cannot open %s: %E\n"), entry->local_sym_name); |
| 230 | } |
| 231 | else |
| 232 | { |
| 233 | search_arch_type *arch; |
| 234 | |
| 235 | /* Try to open <filename><suffix> or lib<filename><suffix>.a */ |
| 236 | for (arch = search_arch_head; |
| 237 | arch != (search_arch_type *) NULL; |
| 238 | arch = arch->next) |
| 239 | { |
| 240 | if (ldfile_open_file_search (arch->name, entry, "lib", ".a")) |
| 241 | return; |
| 242 | #ifdef VMS |
| 243 | if (ldfile_open_file_search (arch->name, entry, ":lib", ".a")) |
| 244 | return; |
| 245 | #endif |
| 246 | if (ldemul_find_potential_libraries (arch->name, entry)) |
| 247 | return; |
| 248 | } |
| 249 | |
| 250 | einfo (_("%F%P: cannot find %s\n"), entry->local_sym_name); |
| 251 | } |
| 252 | } |
| 253 | |
| 254 | /* Try to open NAME; if that fails, try NAME with EXTEN appended to it. */ |
| 255 | |
| 256 | static FILE * |
| 257 | try_open (name, exten) |
| 258 | const char *name; |
| 259 | const char *exten; |
| 260 | { |
| 261 | FILE *result; |
| 262 | char buff[1000]; |
| 263 | |
| 264 | result = fopen (name, "r"); |
| 265 | |
| 266 | if (trace_file_tries) |
| 267 | { |
| 268 | if (result == NULL) |
| 269 | info_msg (_("cannot find script file %s\n"), name); |
| 270 | else |
| 271 | info_msg (_("opened script file %s\n"), name); |
| 272 | } |
| 273 | |
| 274 | if (result != NULL) |
| 275 | return result; |
| 276 | |
| 277 | if (*exten) |
| 278 | { |
| 279 | sprintf (buff, "%s%s", name, exten); |
| 280 | result = fopen (buff, "r"); |
| 281 | |
| 282 | if (trace_file_tries) |
| 283 | { |
| 284 | if (result == NULL) |
| 285 | info_msg (_("cannot find script file %s\n"), buff); |
| 286 | else |
| 287 | info_msg (_("opened script file %s\n"), buff); |
| 288 | } |
| 289 | } |
| 290 | |
| 291 | return result; |
| 292 | } |
| 293 | |
| 294 | /* Try to open NAME; if that fails, look for it in any directories |
| 295 | specified with -L, without and with EXTEND apppended. */ |
| 296 | |
| 297 | FILE * |
| 298 | ldfile_find_command_file (name, extend) |
| 299 | const char *name; |
| 300 | const char *extend; |
| 301 | { |
| 302 | search_dirs_type *search; |
| 303 | FILE *result; |
| 304 | char buffer[1000]; |
| 305 | |
| 306 | /* First try raw name. */ |
| 307 | result = try_open (name, ""); |
| 308 | if (result == (FILE *) NULL) |
| 309 | { |
| 310 | /* Try now prefixes. */ |
| 311 | for (search = search_head; |
| 312 | search != (search_dirs_type *) NULL; |
| 313 | search = search->next) |
| 314 | { |
| 315 | sprintf (buffer, "%s%s%s", search->name, slash, name); |
| 316 | |
| 317 | result = try_open (buffer, extend); |
| 318 | if (result) |
| 319 | break; |
| 320 | } |
| 321 | } |
| 322 | |
| 323 | return result; |
| 324 | } |
| 325 | |
| 326 | void |
| 327 | ldfile_open_command_file (name) |
| 328 | const char *name; |
| 329 | { |
| 330 | FILE *ldlex_input_stack; |
| 331 | ldlex_input_stack = ldfile_find_command_file (name, ""); |
| 332 | |
| 333 | if (ldlex_input_stack == (FILE *) NULL) |
| 334 | { |
| 335 | bfd_set_error (bfd_error_system_call); |
| 336 | einfo (_("%P%F: cannot open linker script file %s: %E\n"), name); |
| 337 | } |
| 338 | |
| 339 | lex_push_file (ldlex_input_stack, name); |
| 340 | |
| 341 | ldfile_input_filename = name; |
| 342 | lineno = 1; |
| 343 | had_script = true; |
| 344 | } |
| 345 | |
| 346 | #ifdef GNU960 |
| 347 | static char * |
| 348 | gnu960_map_archname (name) |
| 349 | char *name; |
| 350 | { |
| 351 | struct tabentry { char *cmd_switch; char *arch; }; |
| 352 | static struct tabentry arch_tab[] = |
| 353 | { |
| 354 | "", "", |
| 355 | "KA", "ka", |
| 356 | "KB", "kb", |
| 357 | "KC", "mc", /* Synonym for MC */ |
| 358 | "MC", "mc", |
| 359 | "CA", "ca", |
| 360 | "SA", "ka", /* Functionally equivalent to KA */ |
| 361 | "SB", "kb", /* Functionally equivalent to KB */ |
| 362 | NULL, "" |
| 363 | }; |
| 364 | struct tabentry *tp; |
| 365 | |
| 366 | for (tp = arch_tab; tp->cmd_switch != NULL; tp++) |
| 367 | { |
| 368 | if (! strcmp (name,tp->cmd_switch)) |
| 369 | break; |
| 370 | } |
| 371 | |
| 372 | if (tp->cmd_switch == NULL) |
| 373 | einfo (_("%P%F: unknown architecture: %s\n"), name); |
| 374 | |
| 375 | return tp->arch; |
| 376 | } |
| 377 | |
| 378 | void |
| 379 | ldfile_add_arch (name) |
| 380 | char *name; |
| 381 | { |
| 382 | search_arch_type *new = |
| 383 | (search_arch_type *) xmalloc ((bfd_size_type) (sizeof (search_arch_type))); |
| 384 | |
| 385 | if (*name != '\0') |
| 386 | { |
| 387 | if (ldfile_output_machine_name[0] != '\0') |
| 388 | { |
| 389 | einfo (_("%P%F: target architecture respecified\n")); |
| 390 | return; |
| 391 | } |
| 392 | |
| 393 | ldfile_output_machine_name = name; |
| 394 | } |
| 395 | |
| 396 | new->next = (search_arch_type *) NULL; |
| 397 | new->name = gnu960_map_archname (name); |
| 398 | *search_arch_tail_ptr = new; |
| 399 | search_arch_tail_ptr = &new->next; |
| 400 | } |
| 401 | |
| 402 | #else /* not GNU960 */ |
| 403 | |
| 404 | void |
| 405 | ldfile_add_arch (in_name) |
| 406 | CONST char *in_name; |
| 407 | { |
| 408 | char *name = buystring (in_name); |
| 409 | search_arch_type *new = |
| 410 | (search_arch_type *) xmalloc (sizeof (search_arch_type)); |
| 411 | |
| 412 | ldfile_output_machine_name = in_name; |
| 413 | |
| 414 | new->name = name; |
| 415 | new->next = (search_arch_type *) NULL; |
| 416 | while (*name) |
| 417 | { |
| 418 | if (isupper ((unsigned char) *name)) |
| 419 | *name = tolower ((unsigned char) *name); |
| 420 | name++; |
| 421 | } |
| 422 | *search_arch_tail_ptr = new; |
| 423 | search_arch_tail_ptr = &new->next; |
| 424 | |
| 425 | } |
| 426 | #endif |
| 427 | |
| 428 | /* Set the output architecture. */ |
| 429 | |
| 430 | void |
| 431 | ldfile_set_output_arch (string) |
| 432 | CONST char *string; |
| 433 | { |
| 434 | const bfd_arch_info_type *arch = bfd_scan_arch (string); |
| 435 | |
| 436 | if (arch) |
| 437 | { |
| 438 | ldfile_output_architecture = arch->arch; |
| 439 | ldfile_output_machine = arch->mach; |
| 440 | ldfile_output_machine_name = arch->printable_name; |
| 441 | } |
| 442 | else |
| 443 | { |
| 444 | einfo (_("%P%F: cannot represent machine `%s'\n"), string); |
| 445 | } |
| 446 | } |