| 1 | # This shell script emits a C file. -*- C -*- |
| 2 | # It does some substitutions. |
| 3 | ELFSIZE=32 |
| 4 | cat >e${EMULATION_NAME}.c <<EOF |
| 5 | /* This file is is generated by a shell script. DO NOT EDIT! */ |
| 6 | |
| 7 | /* emulate the original gld for the given ${EMULATION_NAME} |
| 8 | Copyright (C) 1991, 93, 96, 97, 98, 1999 Free Software Foundation, Inc. |
| 9 | Written by Steve Chamberlain steve@cygnus.com |
| 10 | |
| 11 | This file is part of GLD, the Gnu Linker. |
| 12 | |
| 13 | This program is free software; you can redistribute it and/or modify |
| 14 | it under the terms of the GNU General Public License as published by |
| 15 | the Free Software Foundation; either version 2 of the License, or |
| 16 | (at your option) any later version. |
| 17 | |
| 18 | This program is distributed in the hope that it will be useful, |
| 19 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 20 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 21 | GNU General Public License for more details. |
| 22 | |
| 23 | You should have received a copy of the GNU General Public License |
| 24 | along with this program; if not, write to the Free Software |
| 25 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 26 | |
| 27 | #define TARGET_IS_${EMULATION_NAME} |
| 28 | |
| 29 | #include "bfd.h" |
| 30 | #include "sysdep.h" |
| 31 | |
| 32 | #include <ctype.h> |
| 33 | |
| 34 | #include "bfdlink.h" |
| 35 | #include "getopt.h" |
| 36 | |
| 37 | #include "ld.h" |
| 38 | #include "ldmain.h" |
| 39 | #include "ldemul.h" |
| 40 | #include "ldfile.h" |
| 41 | #include "ldmisc.h" |
| 42 | |
| 43 | #include "ldexp.h" |
| 44 | #include "ldlang.h" |
| 45 | #include "ldgram.h" |
| 46 | |
| 47 | static boolean gld${EMULATION_NAME}_open_dynamic_archive |
| 48 | PARAMS ((const char *, search_dirs_type *, lang_input_statement_type *)); |
| 49 | static void gld${EMULATION_NAME}_after_open PARAMS ((void)); |
| 50 | static void gld${EMULATION_NAME}_check_needed |
| 51 | PARAMS ((lang_input_statement_type *)); |
| 52 | static void gld${EMULATION_NAME}_stat_needed |
| 53 | PARAMS ((lang_input_statement_type *)); |
| 54 | static boolean gld${EMULATION_NAME}_search_needed |
| 55 | PARAMS ((const char *, const char *, int)); |
| 56 | static boolean gld${EMULATION_NAME}_try_needed PARAMS ((const char *, int)); |
| 57 | static void gld${EMULATION_NAME}_vercheck |
| 58 | PARAMS ((lang_input_statement_type *)); |
| 59 | static void gld${EMULATION_NAME}_find_statement_assignment |
| 60 | PARAMS ((lang_statement_union_type *)); |
| 61 | static void gld${EMULATION_NAME}_find_exp_assignment PARAMS ((etree_type *)); |
| 62 | static boolean gld${EMULATION_NAME}_place_orphan |
| 63 | PARAMS ((lang_input_statement_type *, asection *)); |
| 64 | static void gld${EMULATION_NAME}_place_section |
| 65 | PARAMS ((lang_statement_union_type *)); |
| 66 | static void gld${EMULATION_NAME}_before_parse PARAMS ((void)); |
| 67 | static void gld${EMULATION_NAME}_before_allocation PARAMS ((void)); |
| 68 | static char *gld${EMULATION_NAME}_get_script PARAMS ((int *isfile)); |
| 69 | static int gld${EMULATION_NAME}_parse_args PARAMS((int, char **)); |
| 70 | static void gld${EMULATION_NAME}_list_options PARAMS ((FILE *)); |
| 71 | static void gld${EMULATION_NAME}_finish PARAMS ((void)); |
| 72 | |
| 73 | \f |
| 74 | static int no_pipeline_knowledge = 0; |
| 75 | static char * thumb_entry_symbol = NULL; |
| 76 | |
| 77 | #define OPTION_THUMB_ENTRY 301 |
| 78 | |
| 79 | static struct option longopts[] = |
| 80 | { |
| 81 | { "no-pipeline-knowledge", no_argument, NULL, 'p'}, |
| 82 | { "thumb-entry", required_argument, NULL, OPTION_THUMB_ENTRY}, |
| 83 | { NULL, no_argument, NULL, 0 } |
| 84 | }; |
| 85 | |
| 86 | static void |
| 87 | gld${EMULATION_NAME}_list_options (file) |
| 88 | FILE * file; |
| 89 | { |
| 90 | fprintf (file, _(" -p --no-pipeline-knowledge Stop the linker knowing about the pipeline length\n")); |
| 91 | fprintf (file, _(" --thumb-entry=<sym> Set the entry point to be Thumb symbol <sym>\n")); |
| 92 | } |
| 93 | |
| 94 | static int |
| 95 | gld${EMULATION_NAME}_parse_args (argc, argv) |
| 96 | int argc; |
| 97 | char ** argv; |
| 98 | { |
| 99 | int longind; |
| 100 | int optc; |
| 101 | int prevoptind = optind; |
| 102 | int prevopterr = opterr; |
| 103 | int wanterror; |
| 104 | static int lastoptind = -1; |
| 105 | |
| 106 | if (lastoptind != optind) |
| 107 | opterr = 0; |
| 108 | |
| 109 | wanterror = opterr; |
| 110 | lastoptind = optind; |
| 111 | |
| 112 | optc = getopt_long_only (argc, argv, "-p", longopts, & longind); |
| 113 | opterr = prevopterr; |
| 114 | |
| 115 | switch (optc) |
| 116 | { |
| 117 | default: |
| 118 | if (wanterror) |
| 119 | xexit (1); |
| 120 | optind = prevoptind; |
| 121 | return 0; |
| 122 | |
| 123 | case 'p': |
| 124 | no_pipeline_knowledge = 1; |
| 125 | break; |
| 126 | |
| 127 | case OPTION_THUMB_ENTRY: |
| 128 | thumb_entry_symbol = optarg; |
| 129 | break; |
| 130 | } |
| 131 | |
| 132 | return 1; |
| 133 | } |
| 134 | \f |
| 135 | |
| 136 | static void |
| 137 | gld${EMULATION_NAME}_before_parse () |
| 138 | { |
| 139 | #ifndef TARGET_ /* I.e., if not generic. */ |
| 140 | ldfile_set_output_arch ("`echo ${ARCH}`"); |
| 141 | #endif /* not TARGET_ */ |
| 142 | config.dynamic_link = ${DYNAMIC_LINK-true}; |
| 143 | config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo true ; else echo false ; fi`; |
| 144 | } |
| 145 | |
| 146 | /* Try to open a dynamic archive. This is where we know that ELF |
| 147 | dynamic libraries have an extension of .so. */ |
| 148 | |
| 149 | static boolean |
| 150 | gld${EMULATION_NAME}_open_dynamic_archive (arch, search, entry) |
| 151 | const char *arch; |
| 152 | search_dirs_type *search; |
| 153 | lang_input_statement_type *entry; |
| 154 | { |
| 155 | const char *filename; |
| 156 | char *string; |
| 157 | |
| 158 | if (! entry->is_archive) |
| 159 | return false; |
| 160 | |
| 161 | filename = entry->filename; |
| 162 | |
| 163 | string = (char *) xmalloc (strlen (search->name) |
| 164 | + strlen (filename) |
| 165 | + strlen (arch) |
| 166 | + sizeof "/lib.so"); |
| 167 | |
| 168 | sprintf (string, "%s/lib%s%s.so", search->name, filename, arch); |
| 169 | |
| 170 | if (! ldfile_try_open_bfd (string, entry)) |
| 171 | { |
| 172 | free (string); |
| 173 | return false; |
| 174 | } |
| 175 | |
| 176 | entry->filename = string; |
| 177 | |
| 178 | /* We have found a dynamic object to include in the link. The ELF |
| 179 | backend linker will create a DT_NEEDED entry in the .dynamic |
| 180 | section naming this file. If this file includes a DT_SONAME |
| 181 | entry, it will be used. Otherwise, the ELF linker will just use |
| 182 | the name of the file. For an archive found by searching, like |
| 183 | this one, the DT_NEEDED entry should consist of just the name of |
| 184 | the file, without the path information used to find it. Note |
| 185 | that we only need to do this if we have a dynamic object; an |
| 186 | archive will never be referenced by a DT_NEEDED entry. |
| 187 | |
| 188 | FIXME: This approach--using bfd_elf_set_dt_needed_name--is not |
| 189 | very pretty. I haven't been able to think of anything that is |
| 190 | pretty, though. */ |
| 191 | if (bfd_check_format (entry->the_bfd, bfd_object) |
| 192 | && (entry->the_bfd->flags & DYNAMIC) != 0) |
| 193 | { |
| 194 | char *needed_name; |
| 195 | |
| 196 | ASSERT (entry->is_archive && entry->search_dirs_flag); |
| 197 | needed_name = (char *) xmalloc (strlen (filename) |
| 198 | + strlen (arch) |
| 199 | + sizeof "lib.so"); |
| 200 | sprintf (needed_name, "lib%s%s.so", filename, arch); |
| 201 | bfd_elf_set_dt_needed_name (entry->the_bfd, needed_name); |
| 202 | } |
| 203 | |
| 204 | return true; |
| 205 | } |
| 206 | |
| 207 | EOF |
| 208 | if [ "x${host}" = "x${target}" ] ; then |
| 209 | case " ${EMULATION_LIBPATH} " in |
| 210 | *" ${EMULATION_NAME} "*) |
| 211 | cat >>e${EMULATION_NAME}.c <<EOF |
| 212 | |
| 213 | /* For a native linker, check the file /etc/ld.so.conf for directories |
| 214 | in which we may find shared libraries. /etc/ld.so.conf is really |
| 215 | only meaningful on Linux, but we check it on other systems anyhow. */ |
| 216 | |
| 217 | static boolean gld${EMULATION_NAME}_check_ld_so_conf |
| 218 | PARAMS ((const char *, int)); |
| 219 | |
| 220 | static boolean |
| 221 | gld${EMULATION_NAME}_check_ld_so_conf (name, force) |
| 222 | const char *name; |
| 223 | int force; |
| 224 | { |
| 225 | static boolean initialized; |
| 226 | static char *ld_so_conf; |
| 227 | |
| 228 | if (! initialized) |
| 229 | { |
| 230 | FILE *f; |
| 231 | |
| 232 | f = fopen ("/etc/ld.so.conf", FOPEN_RT); |
| 233 | if (f != NULL) |
| 234 | { |
| 235 | char *b; |
| 236 | size_t len, alloc; |
| 237 | int c; |
| 238 | |
| 239 | len = 0; |
| 240 | alloc = 100; |
| 241 | b = (char *) xmalloc (alloc); |
| 242 | |
| 243 | while ((c = getc (f)) != EOF) |
| 244 | { |
| 245 | if (len + 1 >= alloc) |
| 246 | { |
| 247 | alloc *= 2; |
| 248 | b = (char *) xrealloc (b, alloc); |
| 249 | } |
| 250 | if (c != ':' |
| 251 | && c != ' ' |
| 252 | && c != '\t' |
| 253 | && c != '\n' |
| 254 | && c != ',') |
| 255 | { |
| 256 | b[len] = c; |
| 257 | ++len; |
| 258 | } |
| 259 | else |
| 260 | { |
| 261 | if (len > 0 && b[len - 1] != ':') |
| 262 | { |
| 263 | b[len] = ':'; |
| 264 | ++len; |
| 265 | } |
| 266 | } |
| 267 | } |
| 268 | |
| 269 | if (len > 0 && b[len - 1] == ':') |
| 270 | --len; |
| 271 | |
| 272 | if (len > 0) |
| 273 | b[len] = '\0'; |
| 274 | else |
| 275 | { |
| 276 | free (b); |
| 277 | b = NULL; |
| 278 | } |
| 279 | |
| 280 | fclose (f); |
| 281 | |
| 282 | ld_so_conf = b; |
| 283 | } |
| 284 | |
| 285 | initialized = true; |
| 286 | } |
| 287 | |
| 288 | if (ld_so_conf == NULL) |
| 289 | return false; |
| 290 | |
| 291 | return gld${EMULATION_NAME}_search_needed (ld_so_conf, name, force); |
| 292 | } |
| 293 | |
| 294 | EOF |
| 295 | ;; |
| 296 | esac |
| 297 | fi |
| 298 | cat >>e${EMULATION_NAME}.c <<EOF |
| 299 | |
| 300 | /* These variables are required to pass information back and forth |
| 301 | between after_open and check_needed and stat_needed and vercheck. */ |
| 302 | |
| 303 | static struct bfd_link_needed_list *global_needed; |
| 304 | static struct stat global_stat; |
| 305 | static boolean global_found; |
| 306 | static struct bfd_link_needed_list *global_vercheck_needed; |
| 307 | static boolean global_vercheck_failed; |
| 308 | |
| 309 | static void |
| 310 | gld${EMULATION_NAME}_after_open () |
| 311 | { |
| 312 | struct bfd_link_needed_list *needed, *l; |
| 313 | |
| 314 | if (strstr (bfd_get_target (output_bfd), "arm") == NULL) |
| 315 | { |
| 316 | /* The arm backend needs special fields in the output hash structure. |
| 317 | These will only be created if the output format is an arm format, |
| 318 | hence we do not support linking and changing output formats at the |
| 319 | same time. Use a link followed by objcopy to change output formats. */ |
| 320 | einfo ("%F%X%P: error: cannot change output format whilst linking ARM binaries\n"); |
| 321 | return; |
| 322 | } |
| 323 | |
| 324 | { |
| 325 | LANG_FOR_EACH_INPUT_STATEMENT (is) |
| 326 | { |
| 327 | /* The interworking bfd must be the last one to be processed */ |
| 328 | if (!is->next) |
| 329 | bfd_elf32_arm_get_bfd_for_interworking (is->the_bfd, & link_info); |
| 330 | } |
| 331 | } |
| 332 | |
| 333 | /* We only need to worry about this when doing a final link. */ |
| 334 | if (link_info.relocateable || link_info.shared) |
| 335 | return; |
| 336 | |
| 337 | /* Get the list of files which appear in DT_NEEDED entries in |
| 338 | dynamic objects included in the link (often there will be none). |
| 339 | For each such file, we want to track down the corresponding |
| 340 | library, and include the symbol table in the link. This is what |
| 341 | the runtime dynamic linker will do. Tracking the files down here |
| 342 | permits one dynamic object to include another without requiring |
| 343 | special action by the person doing the link. Note that the |
| 344 | needed list can actually grow while we are stepping through this |
| 345 | loop. */ |
| 346 | needed = bfd_elf_get_needed_list (output_bfd, &link_info); |
| 347 | for (l = needed; l != NULL; l = l->next) |
| 348 | { |
| 349 | struct bfd_link_needed_list *ll; |
| 350 | int force; |
| 351 | |
| 352 | /* If we've already seen this file, skip it. */ |
| 353 | for (ll = needed; ll != l; ll = ll->next) |
| 354 | if (strcmp (ll->name, l->name) == 0) |
| 355 | break; |
| 356 | if (ll != l) |
| 357 | continue; |
| 358 | |
| 359 | /* See if this file was included in the link explicitly. */ |
| 360 | global_needed = l; |
| 361 | global_found = false; |
| 362 | lang_for_each_input_file (gld${EMULATION_NAME}_check_needed); |
| 363 | if (global_found) |
| 364 | continue; |
| 365 | |
| 366 | /* We need to find this file and include the symbol table. We |
| 367 | want to search for the file in the same way that the dynamic |
| 368 | linker will search. That means that we want to use |
| 369 | rpath_link, rpath, then the environment variable |
| 370 | LD_LIBRARY_PATH (native only), then the linker script |
| 371 | LIB_SEARCH_DIRS. We do not search using the -L arguments. |
| 372 | |
| 373 | We search twice. The first time, we skip objects which may |
| 374 | introduce version mismatches. The second time, we force |
| 375 | their use. See gld${EMULATION_NAME}_vercheck comment. */ |
| 376 | for (force = 0; force < 2; force++) |
| 377 | { |
| 378 | const char *lib_path; |
| 379 | size_t len; |
| 380 | search_dirs_type *search; |
| 381 | |
| 382 | if (gld${EMULATION_NAME}_search_needed (command_line.rpath_link, |
| 383 | l->name, force)) |
| 384 | break; |
| 385 | if (gld${EMULATION_NAME}_search_needed (command_line.rpath, |
| 386 | l->name, force)) |
| 387 | break; |
| 388 | if (command_line.rpath_link == NULL |
| 389 | && command_line.rpath == NULL) |
| 390 | { |
| 391 | lib_path = (const char *) getenv ("LD_RUN_PATH"); |
| 392 | if (gld${EMULATION_NAME}_search_needed (lib_path, l->name, |
| 393 | force)) |
| 394 | break; |
| 395 | } |
| 396 | EOF |
| 397 | if [ "x${host}" = "x${target}" ] ; then |
| 398 | case " ${EMULATION_LIBPATH} " in |
| 399 | *" ${EMULATION_NAME} "*) |
| 400 | cat >>e${EMULATION_NAME}.c <<EOF |
| 401 | lib_path = (const char *) getenv ("LD_LIBRARY_PATH"); |
| 402 | if (gld${EMULATION_NAME}_search_needed (lib_path, l->name, force)) |
| 403 | break; |
| 404 | EOF |
| 405 | ;; |
| 406 | esac |
| 407 | fi |
| 408 | cat >>e${EMULATION_NAME}.c <<EOF |
| 409 | len = strlen (l->name); |
| 410 | for (search = search_head; search != NULL; search = search->next) |
| 411 | { |
| 412 | char *filename; |
| 413 | |
| 414 | if (search->cmdline) |
| 415 | continue; |
| 416 | filename = (char *) xmalloc (strlen (search->name) + len + 2); |
| 417 | sprintf (filename, "%s/%s", search->name, l->name); |
| 418 | if (gld${EMULATION_NAME}_try_needed (filename, force)) |
| 419 | break; |
| 420 | free (filename); |
| 421 | } |
| 422 | if (search != NULL) |
| 423 | break; |
| 424 | EOF |
| 425 | if [ "x${host}" = "x${target}" ] ; then |
| 426 | case " ${EMULATION_LIBPATH} " in |
| 427 | *" ${EMULATION_NAME} "*) |
| 428 | cat >>e${EMULATION_NAME}.c <<EOF |
| 429 | if (gld${EMULATION_NAME}_check_ld_so_conf (l->name, force)) |
| 430 | break; |
| 431 | EOF |
| 432 | ;; |
| 433 | esac |
| 434 | fi |
| 435 | cat >>e${EMULATION_NAME}.c <<EOF |
| 436 | } |
| 437 | |
| 438 | if (force < 2) |
| 439 | continue; |
| 440 | |
| 441 | einfo ("%P: warning: %s, needed by %B, not found (try using --rpath)\n", |
| 442 | l->name, l->by); |
| 443 | } |
| 444 | } |
| 445 | |
| 446 | /* Search for a needed file in a path. */ |
| 447 | |
| 448 | static boolean |
| 449 | gld${EMULATION_NAME}_search_needed (path, name, force) |
| 450 | const char *path; |
| 451 | const char *name; |
| 452 | int force; |
| 453 | { |
| 454 | const char *s; |
| 455 | size_t len; |
| 456 | |
| 457 | if (path == NULL || *path == '\0') |
| 458 | return false; |
| 459 | len = strlen (name); |
| 460 | while (1) |
| 461 | { |
| 462 | char *filename, *sset; |
| 463 | |
| 464 | s = strchr (path, ':'); |
| 465 | if (s == NULL) |
| 466 | s = path + strlen (path); |
| 467 | |
| 468 | filename = (char *) xmalloc (s - path + len + 2); |
| 469 | if (s == path) |
| 470 | sset = filename; |
| 471 | else |
| 472 | { |
| 473 | memcpy (filename, path, s - path); |
| 474 | filename[s - path] = '/'; |
| 475 | sset = filename + (s - path) + 1; |
| 476 | } |
| 477 | strcpy (sset, name); |
| 478 | |
| 479 | if (gld${EMULATION_NAME}_try_needed (filename, force)) |
| 480 | return true; |
| 481 | |
| 482 | free (filename); |
| 483 | |
| 484 | if (*s == '\0') |
| 485 | break; |
| 486 | path = s + 1; |
| 487 | } |
| 488 | |
| 489 | return false; |
| 490 | } |
| 491 | |
| 492 | /* This function is called for each possible name for a dynamic object |
| 493 | named by a DT_NEEDED entry. The FORCE parameter indicates whether |
| 494 | to skip the check for a conflicting version. */ |
| 495 | |
| 496 | static boolean |
| 497 | gld${EMULATION_NAME}_try_needed (name, force) |
| 498 | const char *name; |
| 499 | int force; |
| 500 | { |
| 501 | bfd *abfd; |
| 502 | |
| 503 | abfd = bfd_openr (name, bfd_get_target (output_bfd)); |
| 504 | if (abfd == NULL) |
| 505 | return false; |
| 506 | if (! bfd_check_format (abfd, bfd_object)) |
| 507 | { |
| 508 | (void) bfd_close (abfd); |
| 509 | return false; |
| 510 | } |
| 511 | if ((bfd_get_file_flags (abfd) & DYNAMIC) == 0) |
| 512 | { |
| 513 | (void) bfd_close (abfd); |
| 514 | return false; |
| 515 | } |
| 516 | |
| 517 | /* Check whether this object would include any conflicting library |
| 518 | versions. If FORCE is set, then we skip this check; we use this |
| 519 | the second time around, if we couldn't find any compatible |
| 520 | instance of the shared library. */ |
| 521 | |
| 522 | if (! force) |
| 523 | { |
| 524 | struct bfd_link_needed_list *needed; |
| 525 | |
| 526 | if (! bfd_elf_get_bfd_needed_list (abfd, &needed)) |
| 527 | einfo ("%F%P:%B: bfd_elf_get_bfd_needed_list failed: %E\n", abfd); |
| 528 | |
| 529 | if (needed != NULL) |
| 530 | { |
| 531 | global_vercheck_needed = needed; |
| 532 | global_vercheck_failed = false; |
| 533 | lang_for_each_input_file (gld${EMULATION_NAME}_vercheck); |
| 534 | if (global_vercheck_failed) |
| 535 | { |
| 536 | (void) bfd_close (abfd); |
| 537 | /* Return false to force the caller to move on to try |
| 538 | another file on the search path. */ |
| 539 | return false; |
| 540 | } |
| 541 | |
| 542 | /* But wait! It gets much worse. On Linux, if a shared |
| 543 | library does not use libc at all, we are supposed to skip |
| 544 | it the first time around in case we encounter a shared |
| 545 | library later on with the same name which does use the |
| 546 | version of libc that we want. This is much too horrible |
| 547 | to use on any system other than Linux. */ |
| 548 | |
| 549 | EOF |
| 550 | case ${target} in |
| 551 | *-*-linux-gnu*) |
| 552 | cat >>e${EMULATION_NAME}.c <<EOF |
| 553 | { |
| 554 | struct bfd_link_needed_list *l; |
| 555 | |
| 556 | for (l = needed; l != NULL; l = l->next) |
| 557 | if (strncmp (l->name, "libc.so", 7) == 0) |
| 558 | break; |
| 559 | if (l == NULL) |
| 560 | { |
| 561 | (void) bfd_close (abfd); |
| 562 | return false; |
| 563 | } |
| 564 | } |
| 565 | |
| 566 | EOF |
| 567 | ;; |
| 568 | esac |
| 569 | cat >>e${EMULATION_NAME}.c <<EOF |
| 570 | } |
| 571 | } |
| 572 | |
| 573 | /* We've found a dynamic object matching the DT_NEEDED entry. */ |
| 574 | |
| 575 | /* We have already checked that there is no other input file of the |
| 576 | same name. We must now check again that we are not including the |
| 577 | same file twice. We need to do this because on many systems |
| 578 | libc.so is a symlink to, e.g., libc.so.1. The SONAME entry will |
| 579 | reference libc.so.1. If we have already included libc.so, we |
| 580 | don't want to include libc.so.1 if they are the same file, and we |
| 581 | can only check that using stat. */ |
| 582 | |
| 583 | if (bfd_stat (abfd, &global_stat) != 0) |
| 584 | einfo ("%F%P:%B: bfd_stat failed: %E\n", abfd); |
| 585 | global_found = false; |
| 586 | lang_for_each_input_file (gld${EMULATION_NAME}_stat_needed); |
| 587 | if (global_found) |
| 588 | { |
| 589 | /* Return true to indicate that we found the file, even though |
| 590 | we aren't going to do anything with it. */ |
| 591 | return true; |
| 592 | } |
| 593 | |
| 594 | /* Tell the ELF backend that don't want the output file to have a |
| 595 | DT_NEEDED entry for this file. */ |
| 596 | bfd_elf_set_dt_needed_name (abfd, ""); |
| 597 | |
| 598 | /* Add this file into the symbol table. */ |
| 599 | if (! bfd_link_add_symbols (abfd, &link_info)) |
| 600 | einfo ("%F%B: could not read symbols: %E\n", abfd); |
| 601 | |
| 602 | return true; |
| 603 | } |
| 604 | |
| 605 | /* See if an input file matches a DT_NEEDED entry by name. */ |
| 606 | |
| 607 | static void |
| 608 | gld${EMULATION_NAME}_check_needed (s) |
| 609 | lang_input_statement_type *s; |
| 610 | { |
| 611 | if (global_found) |
| 612 | return; |
| 613 | |
| 614 | if (s->filename != NULL |
| 615 | && strcmp (s->filename, global_needed->name) == 0) |
| 616 | { |
| 617 | global_found = true; |
| 618 | return; |
| 619 | } |
| 620 | |
| 621 | if (s->the_bfd != NULL) |
| 622 | { |
| 623 | const char *soname; |
| 624 | |
| 625 | soname = bfd_elf_get_dt_soname (s->the_bfd); |
| 626 | if (soname != NULL |
| 627 | && strcmp (soname, global_needed->name) == 0) |
| 628 | { |
| 629 | global_found = true; |
| 630 | return; |
| 631 | } |
| 632 | } |
| 633 | |
| 634 | if (s->search_dirs_flag |
| 635 | && s->filename != NULL |
| 636 | && strchr (global_needed->name, '/') == NULL) |
| 637 | { |
| 638 | const char *f; |
| 639 | |
| 640 | f = strrchr (s->filename, '/'); |
| 641 | if (f != NULL |
| 642 | && strcmp (f + 1, global_needed->name) == 0) |
| 643 | { |
| 644 | global_found = true; |
| 645 | return; |
| 646 | } |
| 647 | } |
| 648 | } |
| 649 | |
| 650 | /* See if an input file matches a DT_NEEDED entry by running stat on |
| 651 | the file. */ |
| 652 | |
| 653 | static void |
| 654 | gld${EMULATION_NAME}_stat_needed (s) |
| 655 | lang_input_statement_type *s; |
| 656 | { |
| 657 | struct stat st; |
| 658 | const char *suffix; |
| 659 | const char *soname; |
| 660 | const char *f; |
| 661 | |
| 662 | if (global_found) |
| 663 | return; |
| 664 | if (s->the_bfd == NULL) |
| 665 | return; |
| 666 | |
| 667 | if (bfd_stat (s->the_bfd, &st) != 0) |
| 668 | { |
| 669 | einfo ("%P:%B: bfd_stat failed: %E\n", s->the_bfd); |
| 670 | return; |
| 671 | } |
| 672 | |
| 673 | if (st.st_dev == global_stat.st_dev |
| 674 | && st.st_ino == global_stat.st_ino) |
| 675 | { |
| 676 | global_found = true; |
| 677 | return; |
| 678 | } |
| 679 | |
| 680 | /* We issue a warning if it looks like we are including two |
| 681 | different versions of the same shared library. For example, |
| 682 | there may be a problem if -lc picks up libc.so.6 but some other |
| 683 | shared library has a DT_NEEDED entry of libc.so.5. This is a |
| 684 | hueristic test, and it will only work if the name looks like |
| 685 | NAME.so.VERSION. FIXME: Depending on file names is error-prone. |
| 686 | If we really want to issue warnings about mixing version numbers |
| 687 | of shared libraries, we need to find a better way. */ |
| 688 | |
| 689 | if (strchr (global_needed->name, '/') != NULL) |
| 690 | return; |
| 691 | suffix = strstr (global_needed->name, ".so."); |
| 692 | if (suffix == NULL) |
| 693 | return; |
| 694 | suffix += sizeof ".so." - 1; |
| 695 | |
| 696 | soname = bfd_elf_get_dt_soname (s->the_bfd); |
| 697 | if (soname == NULL) |
| 698 | soname = s->filename; |
| 699 | |
| 700 | f = strrchr (soname, '/'); |
| 701 | if (f != NULL) |
| 702 | ++f; |
| 703 | else |
| 704 | f = soname; |
| 705 | |
| 706 | if (strncmp (f, global_needed->name, suffix - global_needed->name) == 0) |
| 707 | einfo ("%P: warning: %s, needed by %B, may conflict with %s\n", |
| 708 | global_needed->name, global_needed->by, f); |
| 709 | } |
| 710 | |
| 711 | /* On Linux, it's possible to have different versions of the same |
| 712 | shared library linked against different versions of libc. The |
| 713 | dynamic linker somehow tags which libc version to use in |
| 714 | /etc/ld.so.cache, and, based on the libc that it sees in the |
| 715 | executable, chooses which version of the shared library to use. |
| 716 | |
| 717 | We try to do a similar check here by checking whether this shared |
| 718 | library needs any other shared libraries which may conflict with |
| 719 | libraries we have already included in the link. If it does, we |
| 720 | skip it, and try to find another shared library farther on down the |
| 721 | link path. |
| 722 | |
| 723 | This is called via lang_for_each_input_file. |
| 724 | GLOBAL_VERCHECK_NEEDED is the list of objects needed by the object |
| 725 | which we ar checking. This sets GLOBAL_VERCHECK_FAILED if we find |
| 726 | a conflicting version. */ |
| 727 | |
| 728 | static void |
| 729 | gld${EMULATION_NAME}_vercheck (s) |
| 730 | lang_input_statement_type *s; |
| 731 | { |
| 732 | const char *soname, *f; |
| 733 | struct bfd_link_needed_list *l; |
| 734 | |
| 735 | if (global_vercheck_failed) |
| 736 | return; |
| 737 | if (s->the_bfd == NULL |
| 738 | || (bfd_get_file_flags (s->the_bfd) & DYNAMIC) == 0) |
| 739 | return; |
| 740 | |
| 741 | soname = bfd_elf_get_dt_soname (s->the_bfd); |
| 742 | if (soname == NULL) |
| 743 | soname = bfd_get_filename (s->the_bfd); |
| 744 | |
| 745 | f = strrchr (soname, '/'); |
| 746 | if (f != NULL) |
| 747 | ++f; |
| 748 | else |
| 749 | f = soname; |
| 750 | |
| 751 | for (l = global_vercheck_needed; l != NULL; l = l->next) |
| 752 | { |
| 753 | const char *suffix; |
| 754 | |
| 755 | if (strcmp (f, l->name) == 0) |
| 756 | { |
| 757 | /* Probably can't happen, but it's an easy check. */ |
| 758 | continue; |
| 759 | } |
| 760 | |
| 761 | if (strchr (l->name, '/') != NULL) |
| 762 | continue; |
| 763 | |
| 764 | suffix = strstr (l->name, ".so."); |
| 765 | if (suffix == NULL) |
| 766 | continue; |
| 767 | |
| 768 | suffix += sizeof ".so." - 1; |
| 769 | |
| 770 | if (strncmp (f, l->name, suffix - l->name) == 0) |
| 771 | { |
| 772 | /* Here we know that S is a dynamic object FOO.SO.VER1, and |
| 773 | the object we are considering needs a dynamic object |
| 774 | FOO.SO.VER2, and VER1 and VER2 are different. This |
| 775 | appears to be a version mismatch, so we tell the caller |
| 776 | to try a different version of this library. */ |
| 777 | global_vercheck_failed = true; |
| 778 | return; |
| 779 | } |
| 780 | } |
| 781 | } |
| 782 | |
| 783 | /* Place an orphan section. We use this to put random SHF_ALLOC |
| 784 | sections in the right segment. */ |
| 785 | |
| 786 | static asection *hold_section; |
| 787 | static lang_output_section_statement_type *hold_use; |
| 788 | |
| 789 | struct orphan_save |
| 790 | { |
| 791 | lang_output_section_statement_type *os; |
| 792 | lang_statement_union_type **stmt; |
| 793 | }; |
| 794 | static struct orphan_save hold_text; |
| 795 | static struct orphan_save hold_rodata; |
| 796 | static struct orphan_save hold_data; |
| 797 | static struct orphan_save hold_bss; |
| 798 | static struct orphan_save hold_rel; |
| 799 | static struct orphan_save hold_interp; |
| 800 | |
| 801 | /*ARGSUSED*/ |
| 802 | static boolean |
| 803 | gld${EMULATION_NAME}_place_orphan (file, s) |
| 804 | lang_input_statement_type *file; |
| 805 | asection *s; |
| 806 | { |
| 807 | struct orphan_save *place; |
| 808 | asection *snew, **pps; |
| 809 | lang_statement_list_type *old; |
| 810 | lang_statement_list_type add; |
| 811 | etree_type *address; |
| 812 | const char *secname, *ps; |
| 813 | const char *outsecname; |
| 814 | lang_output_section_statement_type *os; |
| 815 | |
| 816 | /* Look through the script to see where to place this section. */ |
| 817 | hold_section = s; |
| 818 | hold_use = NULL; |
| 819 | lang_for_each_statement (gld${EMULATION_NAME}_place_section); |
| 820 | |
| 821 | if (hold_use != NULL) |
| 822 | { |
| 823 | /* We have already placed a section with this name. */ |
| 824 | wild_doit (&hold_use->children, s, hold_use, file); |
| 825 | return true; |
| 826 | } |
| 827 | |
| 828 | secname = bfd_get_section_name (s->owner, s); |
| 829 | |
| 830 | /* If this is a final link, then always put .gnu.warning.SYMBOL |
| 831 | sections into the .text section to get them out of the way. */ |
| 832 | if (! link_info.shared |
| 833 | && ! link_info.relocateable |
| 834 | && strncmp (secname, ".gnu.warning.", sizeof ".gnu.warning." - 1) == 0 |
| 835 | && hold_text.os != NULL) |
| 836 | { |
| 837 | wild_doit (&hold_text.os->children, s, hold_text.os, file); |
| 838 | return true; |
| 839 | } |
| 840 | |
| 841 | /* Decide which segment the section should go in based on the |
| 842 | section name and section flags. We put loadable .note sections |
| 843 | right after the .interp section, so that the PT_NOTE segment is |
| 844 | stored right after the program headers where the OS can read it |
| 845 | in the first page. */ |
| 846 | if (s->flags & SEC_EXCLUDE) |
| 847 | return false; |
| 848 | else if ((s->flags & SEC_LOAD) != 0 |
| 849 | && strncmp (secname, ".note", 4) == 0 |
| 850 | && hold_interp.os != NULL) |
| 851 | place = &hold_interp; |
| 852 | else if ((s->flags & SEC_HAS_CONTENTS) == 0 |
| 853 | && hold_bss.os != NULL) |
| 854 | place = &hold_bss; |
| 855 | else if ((s->flags & SEC_READONLY) == 0 |
| 856 | && hold_data.os != NULL) |
| 857 | place = &hold_data; |
| 858 | else if (strncmp (secname, ".rel", 4) == 0 |
| 859 | && hold_rel.os != NULL) |
| 860 | place = &hold_rel; |
| 861 | else if ((s->flags & SEC_CODE) == 0 |
| 862 | && (s->flags & SEC_READONLY) != 0 |
| 863 | && hold_rodata.os != NULL) |
| 864 | place = &hold_rodata; |
| 865 | else if ((s->flags & SEC_READONLY) != 0 |
| 866 | && hold_text.os != NULL) |
| 867 | place = &hold_text; |
| 868 | else |
| 869 | place = NULL; |
| 870 | |
| 871 | /* Choose a unique name for the section. This will be needed if the |
| 872 | same section name appears in the input file with different |
| 873 | loadable or allocateable characteristics. */ |
| 874 | outsecname = secname; |
| 875 | if (bfd_get_section_by_name (output_bfd, outsecname) != NULL) |
| 876 | { |
| 877 | unsigned int len; |
| 878 | char *newname; |
| 879 | unsigned int i; |
| 880 | |
| 881 | len = strlen (outsecname); |
| 882 | newname = xmalloc (len + 5); |
| 883 | strcpy (newname, outsecname); |
| 884 | i = 0; |
| 885 | do |
| 886 | { |
| 887 | sprintf (newname + len, "%d", i); |
| 888 | ++i; |
| 889 | } |
| 890 | while (bfd_get_section_by_name (output_bfd, newname) != NULL); |
| 891 | |
| 892 | outsecname = newname; |
| 893 | } |
| 894 | |
| 895 | /* Create the section in the output file, and put it in the right |
| 896 | place. This shuffling is to make the output file look neater. */ |
| 897 | snew = bfd_make_section (output_bfd, outsecname); |
| 898 | if (snew == NULL) |
| 899 | einfo ("%P%F: output format %s cannot represent section called %s\n", |
| 900 | output_bfd->xvec->name, outsecname); |
| 901 | if (place != NULL && place->os->bfd_section != NULL) |
| 902 | { |
| 903 | /* Unlink it first. */ |
| 904 | for (pps = &output_bfd->sections; *pps != snew; pps = &(*pps)->next) |
| 905 | ; |
| 906 | *pps = snew->next; |
| 907 | snew->next = NULL; |
| 908 | /* Now tack it on to the end of the "place->os" section list. */ |
| 909 | for (pps = &place->os->bfd_section; *pps; pps = &(*pps)->next) |
| 910 | ; |
| 911 | *pps = snew; |
| 912 | } |
| 913 | |
| 914 | /* Start building a list of statements for this section. */ |
| 915 | old = stat_ptr; |
| 916 | stat_ptr = &add; |
| 917 | lang_list_init (stat_ptr); |
| 918 | |
| 919 | /* If the name of the section is representable in C, then create |
| 920 | symbols to mark the start and the end of the section. */ |
| 921 | for (ps = outsecname; *ps != '\0'; ps++) |
| 922 | if (! isalnum ((unsigned char) *ps) && *ps != '_') |
| 923 | break; |
| 924 | if (*ps == '\0' && config.build_constructors) |
| 925 | { |
| 926 | char *symname; |
| 927 | |
| 928 | symname = (char *) xmalloc (ps - outsecname + sizeof "__start_"); |
| 929 | sprintf (symname, "__start_%s", outsecname); |
| 930 | lang_add_assignment (exp_assop ('=', symname, |
| 931 | exp_unop (ALIGN_K, |
| 932 | exp_intop ((bfd_vma) 1 |
| 933 | << s->alignment_power)))); |
| 934 | } |
| 935 | |
| 936 | if (link_info.relocateable || (s->flags & (SEC_LOAD | SEC_ALLOC)) == 0) |
| 937 | address = exp_intop ((bfd_vma) 0); |
| 938 | else |
| 939 | address = NULL; |
| 940 | |
| 941 | lang_enter_output_section_statement (outsecname, address, 0, |
| 942 | (bfd_vma) 0, |
| 943 | (etree_type *) NULL, |
| 944 | (etree_type *) NULL, |
| 945 | (etree_type *) NULL); |
| 946 | |
| 947 | os = lang_output_section_statement_lookup (outsecname); |
| 948 | wild_doit (&os->children, s, os, file); |
| 949 | |
| 950 | lang_leave_output_section_statement |
| 951 | ((bfd_vma) 0, "*default*", (struct lang_output_section_phdr_list *) NULL, |
| 952 | "*default*"); |
| 953 | stat_ptr = &add; |
| 954 | |
| 955 | if (*ps == '\0' && config.build_constructors) |
| 956 | { |
| 957 | char *symname; |
| 958 | |
| 959 | symname = (char *) xmalloc (ps - outsecname + sizeof "__stop_"); |
| 960 | sprintf (symname, "__stop_%s", outsecname); |
| 961 | lang_add_assignment (exp_assop ('=', symname, |
| 962 | exp_nameop (NAME, "."))); |
| 963 | } |
| 964 | |
| 965 | if (place != NULL) |
| 966 | { |
| 967 | if (! place->stmt) |
| 968 | { |
| 969 | /* Put the new statement list right at the head. */ |
| 970 | *add.tail = place->os->header.next; |
| 971 | place->os->header.next = add.head; |
| 972 | } |
| 973 | else |
| 974 | { |
| 975 | /* Put it after the last orphan statement we added. */ |
| 976 | *add.tail = *place->stmt; |
| 977 | *place->stmt = add.head; |
| 978 | } |
| 979 | place->stmt = add.tail; /* Save the end of this list. */ |
| 980 | } |
| 981 | stat_ptr = old; |
| 982 | |
| 983 | return true; |
| 984 | } |
| 985 | |
| 986 | static void |
| 987 | gld${EMULATION_NAME}_place_section (s) |
| 988 | lang_statement_union_type *s; |
| 989 | { |
| 990 | lang_output_section_statement_type *os; |
| 991 | |
| 992 | if (s->header.type != lang_output_section_statement_enum) |
| 993 | return; |
| 994 | |
| 995 | os = &s->output_section_statement; |
| 996 | |
| 997 | if (strcmp (os->name, hold_section->name) == 0 |
| 998 | && os->bfd_section != NULL |
| 999 | && ((hold_section->flags & (SEC_LOAD | SEC_ALLOC)) |
| 1000 | == (os->bfd_section->flags & (SEC_LOAD | SEC_ALLOC)))) |
| 1001 | hold_use = os; |
| 1002 | |
| 1003 | if (strcmp (os->name, ".text") == 0) |
| 1004 | hold_text.os = os; |
| 1005 | else if (strcmp (os->name, ".rodata") == 0) |
| 1006 | hold_rodata.os = os; |
| 1007 | else if (strcmp (os->name, ".data") == 0) |
| 1008 | hold_data.os = os; |
| 1009 | else if (strcmp (os->name, ".bss") == 0) |
| 1010 | hold_bss.os = os; |
| 1011 | else if (hold_rel.os == NULL |
| 1012 | && os->bfd_section != NULL |
| 1013 | && (os->bfd_section->flags & SEC_ALLOC) != 0 |
| 1014 | && strncmp (os->name, ".rel", 4) == 0) |
| 1015 | hold_rel.os = os; |
| 1016 | else if (strcmp (os->name, ".interp") == 0) |
| 1017 | hold_interp.os = os; |
| 1018 | } |
| 1019 | |
| 1020 | /* Look through an expression for an assignment statement. */ |
| 1021 | |
| 1022 | static void |
| 1023 | gld${EMULATION_NAME}_find_exp_assignment (exp) |
| 1024 | etree_type *exp; |
| 1025 | { |
| 1026 | struct bfd_link_hash_entry *h; |
| 1027 | |
| 1028 | switch (exp->type.node_class) |
| 1029 | { |
| 1030 | case etree_provide: |
| 1031 | h = bfd_link_hash_lookup (link_info.hash, exp->assign.dst, |
| 1032 | false, false, false); |
| 1033 | if (h == NULL) |
| 1034 | break; |
| 1035 | |
| 1036 | /* We call record_link_assignment even if the symbol is defined. |
| 1037 | This is because if it is defined by a dynamic object, we |
| 1038 | actually want to use the value defined by the linker script, |
| 1039 | not the value from the dynamic object (because we are setting |
| 1040 | symbols like etext). If the symbol is defined by a regular |
| 1041 | object, then, as it happens, calling record_link_assignment |
| 1042 | will do no harm. */ |
| 1043 | |
| 1044 | /* Fall through. */ |
| 1045 | case etree_assign: |
| 1046 | if (strcmp (exp->assign.dst, ".") != 0) |
| 1047 | { |
| 1048 | if (! (bfd_elf${ELFSIZE}_record_link_assignment |
| 1049 | (output_bfd, &link_info, exp->assign.dst, |
| 1050 | exp->type.node_class == etree_provide ? true : false))) |
| 1051 | einfo ("%P%F: failed to record assignment to %s: %E\n", |
| 1052 | exp->assign.dst); |
| 1053 | } |
| 1054 | gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src); |
| 1055 | break; |
| 1056 | |
| 1057 | case etree_binary: |
| 1058 | gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs); |
| 1059 | gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs); |
| 1060 | break; |
| 1061 | |
| 1062 | case etree_trinary: |
| 1063 | gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond); |
| 1064 | gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs); |
| 1065 | gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs); |
| 1066 | break; |
| 1067 | |
| 1068 | case etree_unary: |
| 1069 | gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child); |
| 1070 | break; |
| 1071 | |
| 1072 | default: |
| 1073 | break; |
| 1074 | } |
| 1075 | } |
| 1076 | |
| 1077 | /* This is called by the before_allocation routine via |
| 1078 | lang_for_each_statement. It locates any assignment statements, and |
| 1079 | tells the ELF backend about them, in case they are assignments to |
| 1080 | symbols which are referred to by dynamic objects. */ |
| 1081 | |
| 1082 | static void |
| 1083 | gld${EMULATION_NAME}_find_statement_assignment (s) |
| 1084 | lang_statement_union_type *s; |
| 1085 | { |
| 1086 | if (s->header.type == lang_assignment_statement_enum) |
| 1087 | gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp); |
| 1088 | } |
| 1089 | |
| 1090 | /* This is called after the sections have been attached to output |
| 1091 | sections, but before any sizes or addresses have been set. */ |
| 1092 | |
| 1093 | static void |
| 1094 | gld${EMULATION_NAME}_before_allocation () |
| 1095 | { |
| 1096 | const char *rpath; |
| 1097 | asection *sinterp; |
| 1098 | |
| 1099 | /* If we are going to make any variable assignments, we need to let |
| 1100 | the ELF backend know about them in case the variables are |
| 1101 | referred to by dynamic objects. */ |
| 1102 | lang_for_each_statement (gld${EMULATION_NAME}_find_statement_assignment); |
| 1103 | |
| 1104 | /* Let the ELF backend work out the sizes of any sections required |
| 1105 | by dynamic linking. */ |
| 1106 | rpath = command_line.rpath; |
| 1107 | if (rpath == NULL) |
| 1108 | rpath = (const char *) getenv ("LD_RUN_PATH"); |
| 1109 | if (! (bfd_elf${ELFSIZE}_size_dynamic_sections |
| 1110 | (output_bfd, command_line.soname, rpath, |
| 1111 | command_line.export_dynamic, command_line.filter_shlib, |
| 1112 | (const char * const *) command_line.auxiliary_filters, |
| 1113 | &link_info, &sinterp, lang_elf_version_info))) |
| 1114 | einfo ("%P%F: failed to set dynamic section sizes: %E\n"); |
| 1115 | |
| 1116 | /* Let the user override the dynamic linker we are using. */ |
| 1117 | if (command_line.interpreter != NULL |
| 1118 | && sinterp != NULL) |
| 1119 | { |
| 1120 | sinterp->contents = (bfd_byte *) command_line.interpreter; |
| 1121 | sinterp->_raw_size = strlen (command_line.interpreter) + 1; |
| 1122 | } |
| 1123 | |
| 1124 | /* Look for any sections named .gnu.warning. As a GNU extensions, |
| 1125 | we treat such sections as containing warning messages. We print |
| 1126 | out the warning message, and then zero out the section size so |
| 1127 | that it does not get copied into the output file. */ |
| 1128 | |
| 1129 | { |
| 1130 | LANG_FOR_EACH_INPUT_STATEMENT (is) |
| 1131 | { |
| 1132 | asection *s; |
| 1133 | bfd_size_type sz; |
| 1134 | char *msg; |
| 1135 | boolean ret; |
| 1136 | |
| 1137 | if (is->just_syms_flag) |
| 1138 | continue; |
| 1139 | |
| 1140 | s = bfd_get_section_by_name (is->the_bfd, ".gnu.warning"); |
| 1141 | if (s == NULL) |
| 1142 | continue; |
| 1143 | |
| 1144 | sz = bfd_section_size (is->the_bfd, s); |
| 1145 | msg = xmalloc ((size_t) sz + 1); |
| 1146 | if (! bfd_get_section_contents (is->the_bfd, s, msg, (file_ptr) 0, sz)) |
| 1147 | einfo ("%F%B: Can't read contents of section .gnu.warning: %E\n", |
| 1148 | is->the_bfd); |
| 1149 | msg[sz] = '\0'; |
| 1150 | ret = link_info.callbacks->warning (&link_info, msg, |
| 1151 | (const char *) NULL, |
| 1152 | is->the_bfd, (asection *) NULL, |
| 1153 | (bfd_vma) 0); |
| 1154 | ASSERT (ret); |
| 1155 | free (msg); |
| 1156 | |
| 1157 | /* Clobber the section size, so that we don't waste copying the |
| 1158 | warning into the output file. */ |
| 1159 | s->_raw_size = 0; |
| 1160 | } |
| 1161 | } |
| 1162 | |
| 1163 | /* we should be able to set the size of the interworking stub section */ |
| 1164 | |
| 1165 | /* Here we rummage through the found bfds to collect glue information */ |
| 1166 | /* FIXME: should this be based on a command line option? krk@cygnus.com */ |
| 1167 | { |
| 1168 | LANG_FOR_EACH_INPUT_STATEMENT (is) |
| 1169 | { |
| 1170 | if (!bfd_elf32_arm_process_before_allocation (is->the_bfd, & link_info, |
| 1171 | no_pipeline_knowledge)) |
| 1172 | { |
| 1173 | /* xgettext:c-format */ |
| 1174 | einfo (_("Errors encountered processing file %s"), is->filename); |
| 1175 | } |
| 1176 | } |
| 1177 | } |
| 1178 | |
| 1179 | /* We have seen it all. Allocate it, and carry on */ |
| 1180 | bfd_elf32_arm_allocate_interworking_sections (& link_info); |
| 1181 | } |
| 1182 | |
| 1183 | static void |
| 1184 | gld${EMULATION_NAME}_finish PARAMS((void)) |
| 1185 | { |
| 1186 | struct bfd_link_hash_entry * h; |
| 1187 | |
| 1188 | if (thumb_entry_symbol == NULL) |
| 1189 | return; |
| 1190 | |
| 1191 | h = bfd_link_hash_lookup (link_info.hash, thumb_entry_symbol, false, false, true); |
| 1192 | |
| 1193 | if (h != (struct bfd_link_hash_entry *) NULL |
| 1194 | && (h->type == bfd_link_hash_defined |
| 1195 | || h->type == bfd_link_hash_defweak) |
| 1196 | && h->u.def.section->output_section != NULL) |
| 1197 | { |
| 1198 | static char buffer[32]; |
| 1199 | bfd_vma val; |
| 1200 | |
| 1201 | /* Special procesing is required for a Thumb entry symbol. The |
| 1202 | bottom bit of its address must be set. */ |
| 1203 | val = (h->u.def.value |
| 1204 | + bfd_get_section_vma (output_bfd, |
| 1205 | h->u.def.section->output_section) |
| 1206 | + h->u.def.section->output_offset); |
| 1207 | |
| 1208 | val |= 1; |
| 1209 | |
| 1210 | /* Now convert this value into a string and store it in entry_symbol |
| 1211 | where the lang_finish() function will pick it up. */ |
| 1212 | buffer[0] = '0'; |
| 1213 | buffer[1] = 'x'; |
| 1214 | |
| 1215 | sprintf_vma (buffer + 2, val); |
| 1216 | |
| 1217 | if (entry_symbol != NULL && entry_from_cmdline) |
| 1218 | einfo (_("%P: warning: '--thumb-entry %s' is overriding '-e %s'\n"), |
| 1219 | thumb_entry_symbol, entry_symbol); |
| 1220 | entry_symbol = buffer; |
| 1221 | } |
| 1222 | else |
| 1223 | einfo (_("%P: warning: connot find thumb start symbol %s\n"), thumb_entry_symbol); |
| 1224 | } |
| 1225 | |
| 1226 | static char * |
| 1227 | gld${EMULATION_NAME}_get_script (isfile) |
| 1228 | int *isfile; |
| 1229 | EOF |
| 1230 | |
| 1231 | if test -n "$COMPILE_IN" |
| 1232 | then |
| 1233 | # Scripts compiled in. |
| 1234 | |
| 1235 | # sed commands to quote an ld script as a C string. |
| 1236 | sc="-f stringify.sed" |
| 1237 | |
| 1238 | cat >>e${EMULATION_NAME}.c <<EOF |
| 1239 | { |
| 1240 | *isfile = 0; |
| 1241 | |
| 1242 | if (link_info.relocateable == true && config.build_constructors == true) |
| 1243 | return |
| 1244 | EOF |
| 1245 | sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c |
| 1246 | echo ' ; else if (link_info.relocateable == true) return' >> e${EMULATION_NAME}.c |
| 1247 | sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c |
| 1248 | echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c |
| 1249 | sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c |
| 1250 | echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c |
| 1251 | sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c |
| 1252 | if test -n "$GENERATE_SHLIB_SCRIPT" ; then |
| 1253 | echo ' ; else if (link_info.shared) return' >> e${EMULATION_NAME}.c |
| 1254 | sed $sc ldscripts/${EMULATION_NAME}.xs >> e${EMULATION_NAME}.c |
| 1255 | fi |
| 1256 | echo ' ; else return' >> e${EMULATION_NAME}.c |
| 1257 | sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c |
| 1258 | echo '; }' >> e${EMULATION_NAME}.c |
| 1259 | |
| 1260 | else |
| 1261 | # Scripts read from the filesystem. |
| 1262 | |
| 1263 | cat >>e${EMULATION_NAME}.c <<EOF |
| 1264 | { |
| 1265 | *isfile = 1; |
| 1266 | |
| 1267 | if (link_info.relocateable == true && config.build_constructors == true) |
| 1268 | return "ldscripts/${EMULATION_NAME}.xu"; |
| 1269 | else if (link_info.relocateable == true) |
| 1270 | return "ldscripts/${EMULATION_NAME}.xr"; |
| 1271 | else if (!config.text_read_only) |
| 1272 | return "ldscripts/${EMULATION_NAME}.xbn"; |
| 1273 | else if (!config.magic_demand_paged) |
| 1274 | return "ldscripts/${EMULATION_NAME}.xn"; |
| 1275 | else if (link_info.shared) |
| 1276 | return "ldscripts/${EMULATION_NAME}.xs"; |
| 1277 | else |
| 1278 | return "ldscripts/${EMULATION_NAME}.x"; |
| 1279 | } |
| 1280 | EOF |
| 1281 | |
| 1282 | fi |
| 1283 | |
| 1284 | cat >>e${EMULATION_NAME}.c <<EOF |
| 1285 | |
| 1286 | struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation = |
| 1287 | { |
| 1288 | gld${EMULATION_NAME}_before_parse, |
| 1289 | syslib_default, |
| 1290 | hll_default, |
| 1291 | after_parse_default, |
| 1292 | gld${EMULATION_NAME}_after_open, |
| 1293 | after_allocation_default, |
| 1294 | set_output_arch_default, |
| 1295 | ldemul_default_target, |
| 1296 | gld${EMULATION_NAME}_before_allocation, |
| 1297 | gld${EMULATION_NAME}_get_script, |
| 1298 | "${EMULATION_NAME}", |
| 1299 | "${OUTPUT_FORMAT}", |
| 1300 | gld${EMULATION_NAME}_finish, |
| 1301 | NULL, /* create output section statements */ |
| 1302 | gld${EMULATION_NAME}_open_dynamic_archive, |
| 1303 | gld${EMULATION_NAME}_place_orphan, |
| 1304 | NULL, /* set symbols */ |
| 1305 | gld${EMULATION_NAME}_parse_args, |
| 1306 | NULL, /* unrecognized file */ |
| 1307 | gld${EMULATION_NAME}_list_options, |
| 1308 | NULL, /* recognized file */ |
| 1309 | NULL /* find_potential_libraries */ |
| 1310 | }; |
| 1311 | EOF |