| 1 | # This shell script emits a C file. -*- C -*- |
| 2 | # It does some substitutions. |
| 3 | if [ -z "$MACHINE" ]; then |
| 4 | OUTPUT_ARCH=${ARCH} |
| 5 | else |
| 6 | OUTPUT_ARCH=${ARCH}:${MACHINE} |
| 7 | fi |
| 8 | cat >e${EMULATION_NAME}.c <<EOF |
| 9 | /* This file is is generated by a shell script. DO NOT EDIT! */ |
| 10 | |
| 11 | /* SunOS emulation code for ${EMULATION_NAME} |
| 12 | Copyright 1991, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, |
| 13 | 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc. |
| 14 | Written by Steve Chamberlain <sac@cygnus.com> |
| 15 | SunOS shared library support by Ian Lance Taylor <ian@cygnus.com> |
| 16 | |
| 17 | This file is part of the GNU Binutils. |
| 18 | |
| 19 | This program is free software; you can redistribute it and/or modify |
| 20 | it under the terms of the GNU General Public License as published by |
| 21 | the Free Software Foundation; either version 3 of the License, or |
| 22 | (at your option) any later version. |
| 23 | |
| 24 | This program is distributed in the hope that it will be useful, |
| 25 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 26 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 27 | GNU General Public License for more details. |
| 28 | |
| 29 | You should have received a copy of the GNU General Public License |
| 30 | along with this program; if not, write to the Free Software |
| 31 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 32 | MA 02110-1301, USA. */ |
| 33 | |
| 34 | #define TARGET_IS_${EMULATION_NAME} |
| 35 | |
| 36 | #include "sysdep.h" |
| 37 | #include "bfd.h" |
| 38 | #include "bfdlink.h" |
| 39 | #include "libiberty.h" |
| 40 | #include "safe-ctype.h" |
| 41 | |
| 42 | #include "ld.h" |
| 43 | #include "ldmain.h" |
| 44 | #include "ldmisc.h" |
| 45 | #include "ldexp.h" |
| 46 | #include "ldlang.h" |
| 47 | #include "ldfile.h" |
| 48 | #include "ldemul.h" |
| 49 | |
| 50 | #ifdef HAVE_DIRENT_H |
| 51 | # include <dirent.h> |
| 52 | #else |
| 53 | # define dirent direct |
| 54 | # ifdef HAVE_SYS_NDIR_H |
| 55 | # include <sys/ndir.h> |
| 56 | # endif |
| 57 | # ifdef HAVE_SYS_DIR_H |
| 58 | # include <sys/dir.h> |
| 59 | # endif |
| 60 | # ifdef HAVE_NDIR_H |
| 61 | # include <ndir.h> |
| 62 | # endif |
| 63 | #endif |
| 64 | |
| 65 | static void gld${EMULATION_NAME}_find_so |
| 66 | (lang_input_statement_type *); |
| 67 | static char *gld${EMULATION_NAME}_search_dir |
| 68 | (const char *, const char *, bfd_boolean *); |
| 69 | static void gld${EMULATION_NAME}_check_needed |
| 70 | (lang_input_statement_type *); |
| 71 | static bfd_boolean gld${EMULATION_NAME}_search_needed |
| 72 | (const char *, const char *); |
| 73 | static bfd_boolean gld${EMULATION_NAME}_try_needed |
| 74 | (const char *, const char *); |
| 75 | static void gld${EMULATION_NAME}_find_assignment |
| 76 | (lang_statement_union_type *); |
| 77 | static void gld${EMULATION_NAME}_find_exp_assignment |
| 78 | (etree_type *); |
| 79 | static void gld${EMULATION_NAME}_count_need |
| 80 | (lang_input_statement_type *); |
| 81 | static void gld${EMULATION_NAME}_set_need |
| 82 | (lang_input_statement_type *); |
| 83 | |
| 84 | static void |
| 85 | gld${EMULATION_NAME}_before_parse (void) |
| 86 | { |
| 87 | ldfile_set_output_arch ("${OUTPUT_ARCH}", bfd_arch_`echo ${ARCH} | sed -e 's/:.*//'`); |
| 88 | config.dynamic_link = TRUE; |
| 89 | config.has_shared = TRUE; |
| 90 | } |
| 91 | |
| 92 | /* This is called after the command line arguments have been parsed, |
| 93 | but before the linker script has been read. If this is a native |
| 94 | linker, we add the directories in LD_LIBRARY_PATH to the search |
| 95 | list. */ |
| 96 | |
| 97 | static void |
| 98 | gld${EMULATION_NAME}_set_symbols (void) |
| 99 | { |
| 100 | EOF |
| 101 | if [ "x${host}" = "x${target}" ] ; then |
| 102 | case " ${EMULATION_LIBPATH} " in |
| 103 | *" ${EMULATION_NAME} "*) |
| 104 | cat >>e${EMULATION_NAME}.c <<EOF |
| 105 | const char *env; |
| 106 | |
| 107 | env = (const char *) getenv ("LD_LIBRARY_PATH"); |
| 108 | if (env != NULL) |
| 109 | { |
| 110 | char *l; |
| 111 | |
| 112 | l = xstrdup (env); |
| 113 | while (1) |
| 114 | { |
| 115 | char *c; |
| 116 | |
| 117 | c = strchr (l, ':'); |
| 118 | if (c != NULL) |
| 119 | *c++ = '\0'; |
| 120 | if (*l != '\0') |
| 121 | ldfile_add_library_path (l, FALSE); |
| 122 | if (c == NULL) |
| 123 | break; |
| 124 | l = c; |
| 125 | } |
| 126 | } |
| 127 | EOF |
| 128 | ;; |
| 129 | esac |
| 130 | fi |
| 131 | cat >>e${EMULATION_NAME}.c <<EOF |
| 132 | } |
| 133 | |
| 134 | /* Despite the name, we use this routine to search for dynamic |
| 135 | libraries. On SunOS this requires a directory search. We need to |
| 136 | find the .so file with the highest version number. The user may |
| 137 | restrict the major version by saying, e.g., -lc.1. Also, if we |
| 138 | find a .so file, we need to look for a the same file after |
| 139 | replacing .so with .sa; if it exists, it will be an archive which |
| 140 | provide some initializations for data symbols, and we need to |
| 141 | search it after including the .so file. */ |
| 142 | |
| 143 | static void |
| 144 | gld${EMULATION_NAME}_create_output_section_statements (void) |
| 145 | { |
| 146 | lang_for_each_input_file (gld${EMULATION_NAME}_find_so); |
| 147 | } |
| 148 | |
| 149 | /* Search the directory for a .so file for each library search. */ |
| 150 | |
| 151 | static void |
| 152 | gld${EMULATION_NAME}_find_so (lang_input_statement_type *inp) |
| 153 | { |
| 154 | search_dirs_type *search; |
| 155 | char *found = NULL; |
| 156 | char *alc; |
| 157 | struct stat st; |
| 158 | |
| 159 | if (! inp->search_dirs_flag |
| 160 | || ! inp->is_archive |
| 161 | || ! inp->dynamic) |
| 162 | return; |
| 163 | |
| 164 | ASSERT (CONST_STRNEQ (inp->local_sym_name, "-l")); |
| 165 | |
| 166 | for (search = search_head; search != NULL; search = search->next) |
| 167 | { |
| 168 | bfd_boolean found_static; |
| 169 | |
| 170 | found = gld${EMULATION_NAME}_search_dir (search->name, inp->filename, |
| 171 | &found_static); |
| 172 | if (found != NULL || found_static) |
| 173 | break; |
| 174 | } |
| 175 | |
| 176 | if (found == NULL) |
| 177 | { |
| 178 | /* We did not find a matching .so file. This isn't an error, |
| 179 | since there might still be a matching .a file, which will be |
| 180 | found by the usual search. */ |
| 181 | return; |
| 182 | } |
| 183 | |
| 184 | /* Replace the filename with the one we have found. */ |
| 185 | alc = (char *) xmalloc (strlen (search->name) + strlen (found) + 2); |
| 186 | sprintf (alc, "%s/%s", search->name, found); |
| 187 | inp->filename = alc; |
| 188 | |
| 189 | /* Turn off the search_dirs_flag to prevent ldfile_open_file from |
| 190 | searching for this file again. */ |
| 191 | inp->search_dirs_flag = FALSE; |
| 192 | |
| 193 | free (found); |
| 194 | |
| 195 | /* Now look for the same file name, but with .sa instead of .so. If |
| 196 | found, add it to the list of input files. */ |
| 197 | alc = (char *) xmalloc (strlen (inp->filename) + 1); |
| 198 | strcpy (alc, inp->filename); |
| 199 | strstr (alc + strlen (search->name), ".so")[2] = 'a'; |
| 200 | if (stat (alc, &st) != 0) |
| 201 | free (alc); |
| 202 | else |
| 203 | { |
| 204 | lang_input_statement_type *sa; |
| 205 | |
| 206 | /* Add the .sa file to the statement list just before the .so |
| 207 | file. This is really a hack. */ |
| 208 | sa = ((lang_input_statement_type *) |
| 209 | xmalloc (sizeof (lang_input_statement_type))); |
| 210 | *sa = *inp; |
| 211 | |
| 212 | inp->filename = alc; |
| 213 | inp->local_sym_name = alc; |
| 214 | |
| 215 | inp->header.next = (lang_statement_union_type *) sa; |
| 216 | inp->next_real_file = (lang_statement_union_type *) sa; |
| 217 | } |
| 218 | } |
| 219 | |
| 220 | /* Search a directory for a .so file. */ |
| 221 | |
| 222 | static char * |
| 223 | gld${EMULATION_NAME}_search_dir |
| 224 | (const char *dirname, const char *filename, bfd_boolean *found_static) |
| 225 | { |
| 226 | int force_maj, force_min; |
| 227 | const char *dot; |
| 228 | unsigned int len; |
| 229 | char *alc; |
| 230 | char *found; |
| 231 | int max_maj, max_min; |
| 232 | DIR *dir; |
| 233 | struct dirent *entry; |
| 234 | unsigned int dirnamelen; |
| 235 | char *full_path; |
| 236 | int statval; |
| 237 | struct stat st; |
| 238 | |
| 239 | *found_static = FALSE; |
| 240 | |
| 241 | force_maj = -1; |
| 242 | force_min = -1; |
| 243 | dot = strchr (filename, '.'); |
| 244 | if (dot == NULL) |
| 245 | { |
| 246 | len = strlen (filename); |
| 247 | alc = NULL; |
| 248 | } |
| 249 | else |
| 250 | { |
| 251 | force_maj = atoi (dot + 1); |
| 252 | |
| 253 | len = dot - filename; |
| 254 | alc = (char *) xmalloc (len + 1); |
| 255 | strncpy (alc, filename, len); |
| 256 | alc[len] = '\0'; |
| 257 | filename = alc; |
| 258 | |
| 259 | dot = strchr (dot + 1, '.'); |
| 260 | if (dot != NULL) |
| 261 | force_min = atoi (dot + 1); |
| 262 | } |
| 263 | |
| 264 | found = NULL; |
| 265 | max_maj = max_min = 0; |
| 266 | |
| 267 | dir = opendir (dirname); |
| 268 | if (dir == NULL) |
| 269 | return NULL; |
| 270 | dirnamelen = strlen (dirname); |
| 271 | |
| 272 | while ((entry = readdir (dir)) != NULL) |
| 273 | { |
| 274 | const char *s; |
| 275 | int found_maj, found_min; |
| 276 | |
| 277 | if (! CONST_STRNEQ (entry->d_name, "lib") |
| 278 | || strncmp (entry->d_name + 3, filename, len) != 0) |
| 279 | continue; |
| 280 | |
| 281 | if (dot == NULL |
| 282 | && strcmp (entry->d_name + 3 + len, ".a") == 0) |
| 283 | { |
| 284 | *found_static = TRUE; |
| 285 | continue; |
| 286 | } |
| 287 | |
| 288 | /* We accept libfoo.so without a version number, even though the |
| 289 | native linker does not. This is more convenient for packages |
| 290 | which just generate .so files for shared libraries, as on ELF |
| 291 | systems. */ |
| 292 | if (! CONST_STRNEQ (entry->d_name + 3 + len, ".so")) |
| 293 | continue; |
| 294 | if (entry->d_name[6 + len] == '\0') |
| 295 | ; |
| 296 | else if (entry->d_name[6 + len] == '.' |
| 297 | && ISDIGIT (entry->d_name[7 + len])) |
| 298 | ; |
| 299 | else |
| 300 | continue; |
| 301 | |
| 302 | for (s = entry->d_name + 6 + len; *s != '\0'; s++) |
| 303 | if (*s != '.' && ! ISDIGIT (*s)) |
| 304 | break; |
| 305 | if (*s != '\0') |
| 306 | continue; |
| 307 | |
| 308 | /* We've found a .so file. Work out the major and minor |
| 309 | version numbers. */ |
| 310 | found_maj = 0; |
| 311 | found_min = 0; |
| 312 | sscanf (entry->d_name + 3 + len, ".so.%d.%d", |
| 313 | &found_maj, &found_min); |
| 314 | |
| 315 | if ((force_maj != -1 && force_maj != found_maj) |
| 316 | || (force_min != -1 && force_min != found_min)) |
| 317 | continue; |
| 318 | |
| 319 | /* Make sure the file really exists (ignore broken symlinks). */ |
| 320 | full_path = xmalloc (dirnamelen + 1 + strlen (entry->d_name) + 1); |
| 321 | sprintf (full_path, "%s/%s", dirname, entry->d_name); |
| 322 | statval = stat (full_path, &st); |
| 323 | free (full_path); |
| 324 | if (statval != 0) |
| 325 | continue; |
| 326 | |
| 327 | /* We've found a match for the name we are searching for. See |
| 328 | if this is the version we should use. If the major and minor |
| 329 | versions match, we use the last entry in alphabetical order; |
| 330 | I don't know if this is how SunOS distinguishes libc.so.1.8 |
| 331 | from libc.so.1.8.1, but it ought to suffice. */ |
| 332 | if (found == NULL |
| 333 | || (found_maj > max_maj) |
| 334 | || (found_maj == max_maj |
| 335 | && (found_min > max_min |
| 336 | || (found_min == max_min |
| 337 | && strcmp (entry->d_name, found) > 0)))) |
| 338 | { |
| 339 | if (found != NULL) |
| 340 | free (found); |
| 341 | found = (char *) xmalloc (strlen (entry->d_name) + 1); |
| 342 | strcpy (found, entry->d_name); |
| 343 | max_maj = found_maj; |
| 344 | max_min = found_min; |
| 345 | } |
| 346 | } |
| 347 | |
| 348 | closedir (dir); |
| 349 | |
| 350 | if (alc != NULL) |
| 351 | free (alc); |
| 352 | |
| 353 | return found; |
| 354 | } |
| 355 | |
| 356 | /* These variables are required to pass information back and forth |
| 357 | between after_open and check_needed. */ |
| 358 | |
| 359 | static struct bfd_link_needed_list *global_needed; |
| 360 | static bfd_boolean global_found; |
| 361 | |
| 362 | /* This is called after all the input files have been opened. */ |
| 363 | |
| 364 | static void |
| 365 | gld${EMULATION_NAME}_after_open (void) |
| 366 | { |
| 367 | struct bfd_link_needed_list *needed, *l; |
| 368 | |
| 369 | /* We only need to worry about this when doing a final link. */ |
| 370 | if (link_info.relocatable || link_info.shared) |
| 371 | return; |
| 372 | |
| 373 | /* Get the list of files which appear in ld_need entries in dynamic |
| 374 | objects included in the link. For each such file, we want to |
| 375 | track down the corresponding library, and include the symbol |
| 376 | table in the link. This is what the runtime dynamic linker will |
| 377 | do. Tracking the files down here permits one dynamic object to |
| 378 | include another without requiring special action by the person |
| 379 | doing the link. Note that the needed list can actually grow |
| 380 | while we are stepping through this loop. */ |
| 381 | needed = bfd_sunos_get_needed_list (output_bfd, &link_info); |
| 382 | for (l = needed; l != NULL; l = l->next) |
| 383 | { |
| 384 | struct bfd_link_needed_list *ll; |
| 385 | const char *lname; |
| 386 | search_dirs_type *search; |
| 387 | |
| 388 | lname = l->name; |
| 389 | |
| 390 | /* If we've already seen this file, skip it. */ |
| 391 | for (ll = needed; ll != l; ll = ll->next) |
| 392 | if (strcmp (ll->name, lname) == 0) |
| 393 | break; |
| 394 | if (ll != l) |
| 395 | continue; |
| 396 | |
| 397 | /* See if this file was included in the link explicitly. */ |
| 398 | global_needed = l; |
| 399 | global_found = FALSE; |
| 400 | lang_for_each_input_file (gld${EMULATION_NAME}_check_needed); |
| 401 | if (global_found) |
| 402 | continue; |
| 403 | |
| 404 | if (! CONST_STRNEQ (lname, "-l")) |
| 405 | { |
| 406 | bfd *abfd; |
| 407 | |
| 408 | abfd = bfd_openr (lname, bfd_get_target (output_bfd)); |
| 409 | if (abfd != NULL) |
| 410 | { |
| 411 | if (! bfd_check_format (abfd, bfd_object)) |
| 412 | { |
| 413 | (void) bfd_close (abfd); |
| 414 | abfd = NULL; |
| 415 | } |
| 416 | } |
| 417 | if (abfd != NULL) |
| 418 | { |
| 419 | if ((bfd_get_file_flags (abfd) & DYNAMIC) == 0) |
| 420 | { |
| 421 | (void) bfd_close (abfd); |
| 422 | abfd = NULL; |
| 423 | } |
| 424 | } |
| 425 | if (abfd != NULL) |
| 426 | { |
| 427 | /* We've found the needed dynamic object. */ |
| 428 | if (! bfd_link_add_symbols (abfd, &link_info)) |
| 429 | einfo ("%F%B: could not read symbols: %E\n", abfd); |
| 430 | } |
| 431 | else |
| 432 | { |
| 433 | einfo ("%P: warning: %s, needed by %B, not found\n", |
| 434 | lname, l->by); |
| 435 | } |
| 436 | |
| 437 | continue; |
| 438 | } |
| 439 | |
| 440 | lname += 2; |
| 441 | |
| 442 | /* We want to search for the file in the same way that the |
| 443 | dynamic linker will search. That means that we want to use |
| 444 | rpath_link, rpath or -L, then the environment variable |
| 445 | LD_LIBRARY_PATH (native only), then (if rpath was used) the |
| 446 | linker script LIB_SEARCH_DIRS. */ |
| 447 | if (gld${EMULATION_NAME}_search_needed (command_line.rpath_link, |
| 448 | lname)) |
| 449 | continue; |
| 450 | if (command_line.rpath != NULL) |
| 451 | { |
| 452 | if (gld${EMULATION_NAME}_search_needed (command_line.rpath, lname)) |
| 453 | continue; |
| 454 | } |
| 455 | else |
| 456 | { |
| 457 | for (search = search_head; search != NULL; search = search->next) |
| 458 | if (gld${EMULATION_NAME}_try_needed (search->name, lname)) |
| 459 | break; |
| 460 | if (search != NULL) |
| 461 | continue; |
| 462 | } |
| 463 | EOF |
| 464 | if [ "x${host}" = "x${target}" ] ; then |
| 465 | case " ${EMULATION_LIBPATH} " in |
| 466 | *" ${EMULATION_NAME} "*) |
| 467 | cat >>e${EMULATION_NAME}.c <<EOF |
| 468 | { |
| 469 | const char *lib_path; |
| 470 | |
| 471 | lib_path = (const char *) getenv ("LD_LIBRARY_PATH"); |
| 472 | if (gld${EMULATION_NAME}_search_needed (lib_path, lname)) |
| 473 | continue; |
| 474 | } |
| 475 | EOF |
| 476 | ;; |
| 477 | esac |
| 478 | fi |
| 479 | cat >>e${EMULATION_NAME}.c <<EOF |
| 480 | if (command_line.rpath != NULL) |
| 481 | { |
| 482 | for (search = search_head; search != NULL; search = search->next) |
| 483 | { |
| 484 | if (search->cmdline) |
| 485 | continue; |
| 486 | if (gld${EMULATION_NAME}_try_needed (search->name, lname)) |
| 487 | break; |
| 488 | } |
| 489 | if (search != NULL) |
| 490 | continue; |
| 491 | } |
| 492 | |
| 493 | einfo ("%P: warning: %s, needed by %B, not found\n", |
| 494 | l->name, l->by); |
| 495 | } |
| 496 | } |
| 497 | |
| 498 | /* Search for a needed file in a path. */ |
| 499 | |
| 500 | static bfd_boolean |
| 501 | gld${EMULATION_NAME}_search_needed (const char *path, const char *name) |
| 502 | { |
| 503 | const char *s; |
| 504 | |
| 505 | if (path == NULL || *path == '\0') |
| 506 | return FALSE; |
| 507 | while (1) |
| 508 | { |
| 509 | const char *dir; |
| 510 | char *dircopy; |
| 511 | |
| 512 | s = strchr (path, ':'); |
| 513 | if (s == NULL) |
| 514 | { |
| 515 | dircopy = NULL; |
| 516 | dir = path; |
| 517 | } |
| 518 | else |
| 519 | { |
| 520 | dircopy = (char *) xmalloc (s - path + 1); |
| 521 | memcpy (dircopy, path, s - path); |
| 522 | dircopy[s - path] = '\0'; |
| 523 | dir = dircopy; |
| 524 | } |
| 525 | |
| 526 | if (gld${EMULATION_NAME}_try_needed (dir, name)) |
| 527 | return TRUE; |
| 528 | |
| 529 | if (dircopy != NULL) |
| 530 | free (dircopy); |
| 531 | |
| 532 | if (s == NULL) |
| 533 | break; |
| 534 | path = s + 1; |
| 535 | } |
| 536 | |
| 537 | return FALSE; |
| 538 | } |
| 539 | |
| 540 | /* This function is called for each possible directory for a needed |
| 541 | dynamic object. */ |
| 542 | |
| 543 | static bfd_boolean |
| 544 | gld${EMULATION_NAME}_try_needed (const char *dir, const char *name) |
| 545 | { |
| 546 | char *file; |
| 547 | char *alc; |
| 548 | bfd_boolean ignore; |
| 549 | bfd *abfd; |
| 550 | |
| 551 | file = gld${EMULATION_NAME}_search_dir (dir, name, &ignore); |
| 552 | if (file == NULL) |
| 553 | return FALSE; |
| 554 | |
| 555 | alc = (char *) xmalloc (strlen (dir) + strlen (file) + 2); |
| 556 | sprintf (alc, "%s/%s", dir, file); |
| 557 | free (file); |
| 558 | abfd = bfd_openr (alc, bfd_get_target (output_bfd)); |
| 559 | if (abfd == NULL) |
| 560 | return FALSE; |
| 561 | if (! bfd_check_format (abfd, bfd_object)) |
| 562 | { |
| 563 | (void) bfd_close (abfd); |
| 564 | return FALSE; |
| 565 | } |
| 566 | if ((bfd_get_file_flags (abfd) & DYNAMIC) == 0) |
| 567 | { |
| 568 | (void) bfd_close (abfd); |
| 569 | return FALSE; |
| 570 | } |
| 571 | |
| 572 | /* We've found the needed dynamic object. */ |
| 573 | |
| 574 | /* Add this file into the symbol table. */ |
| 575 | if (! bfd_link_add_symbols (abfd, &link_info)) |
| 576 | einfo ("%F%B: could not read symbols: %E\n", abfd); |
| 577 | |
| 578 | return TRUE; |
| 579 | } |
| 580 | |
| 581 | /* See if we have already included a needed object in the link. This |
| 582 | does not have to be precise, as it does no harm to include a |
| 583 | dynamic object more than once. */ |
| 584 | |
| 585 | static void |
| 586 | gld${EMULATION_NAME}_check_needed (lang_input_statement_type *s) |
| 587 | { |
| 588 | if (s->filename == NULL) |
| 589 | return; |
| 590 | if (! CONST_STRNEQ (global_needed->name, "-l")) |
| 591 | { |
| 592 | if (strcmp (s->filename, global_needed->name) == 0) |
| 593 | global_found = TRUE; |
| 594 | } |
| 595 | else |
| 596 | { |
| 597 | const char *sname, *lname; |
| 598 | const char *sdot, *ldot; |
| 599 | int lmaj, lmin, smaj, smin; |
| 600 | |
| 601 | lname = global_needed->name + 2; |
| 602 | |
| 603 | sname = strrchr (s->filename, '/'); |
| 604 | if (sname == NULL) |
| 605 | sname = s->filename; |
| 606 | else |
| 607 | ++sname; |
| 608 | |
| 609 | if (! CONST_STRNEQ (sname, "lib")) |
| 610 | return; |
| 611 | sname += 3; |
| 612 | |
| 613 | ldot = strchr (lname, '.'); |
| 614 | if (ldot == NULL) |
| 615 | ldot = lname + strlen (lname); |
| 616 | |
| 617 | sdot = strstr (sname, ".so."); |
| 618 | if (sdot == NULL) |
| 619 | return; |
| 620 | |
| 621 | if (sdot - sname != ldot - lname |
| 622 | || strncmp (lname, sname, sdot - sname) != 0) |
| 623 | return; |
| 624 | |
| 625 | lmaj = lmin = -1; |
| 626 | sscanf (ldot, ".%d.%d", &lmaj, &lmin); |
| 627 | smaj = smin = -1; |
| 628 | sscanf (sdot, ".so.%d.%d", &smaj, &smin); |
| 629 | if ((smaj != lmaj && smaj != -1 && lmaj != -1) |
| 630 | || (smin != lmin && smin != -1 && lmin != -1)) |
| 631 | return; |
| 632 | |
| 633 | global_found = TRUE; |
| 634 | } |
| 635 | } |
| 636 | |
| 637 | /* We need to use static variables to pass information around the call |
| 638 | to lang_for_each_statement. Ick. */ |
| 639 | |
| 640 | static const char *find_assign; |
| 641 | static bfd_boolean found_assign; |
| 642 | |
| 643 | /* We need to use static variables to pass information around the call |
| 644 | to lang_for_each_input_file. Ick. */ |
| 645 | |
| 646 | static bfd_size_type need_size; |
| 647 | static bfd_size_type need_entries; |
| 648 | static bfd_byte *need_contents; |
| 649 | static bfd_byte *need_pinfo; |
| 650 | static bfd_byte *need_pnames; |
| 651 | |
| 652 | /* The size of one entry in the .need section, not including the file |
| 653 | name. */ |
| 654 | |
| 655 | #define NEED_ENTRY_SIZE (16) |
| 656 | |
| 657 | /* This is called after the sections have been attached to output |
| 658 | sections, but before any sizes or addresses have been set. */ |
| 659 | |
| 660 | static void |
| 661 | gld${EMULATION_NAME}_before_allocation (void) |
| 662 | { |
| 663 | struct bfd_link_hash_entry *hdyn = NULL; |
| 664 | asection *sneed; |
| 665 | asection *srules; |
| 666 | asection *sdyn; |
| 667 | |
| 668 | /* The SunOS native linker creates a shared library whenever there |
| 669 | are any undefined symbols in a link, unless -e is used. This is |
| 670 | pretty weird, but we are compatible. */ |
| 671 | if (! link_info.shared && ! link_info.relocatable && ! entry_from_cmdline) |
| 672 | { |
| 673 | struct bfd_link_hash_entry *h; |
| 674 | |
| 675 | for (h = link_info.hash->undefs; h != NULL; h = h->u.undef.next) |
| 676 | { |
| 677 | if (h->type == bfd_link_hash_undefined |
| 678 | && h->u.undef.abfd != NULL |
| 679 | && (h->u.undef.abfd->flags & DYNAMIC) == 0 |
| 680 | && strcmp (h->root.string, "__DYNAMIC") != 0 |
| 681 | && strcmp (h->root.string, "__GLOBAL_OFFSET_TABLE_") != 0) |
| 682 | { |
| 683 | find_assign = h->root.string; |
| 684 | found_assign = FALSE; |
| 685 | lang_for_each_statement (gld${EMULATION_NAME}_find_assignment); |
| 686 | if (! found_assign) |
| 687 | { |
| 688 | link_info.shared = TRUE; |
| 689 | break; |
| 690 | } |
| 691 | } |
| 692 | } |
| 693 | } |
| 694 | |
| 695 | if (link_info.shared) |
| 696 | { |
| 697 | lang_output_section_statement_type *os; |
| 698 | |
| 699 | /* Set the .text section to start at 0x20, not 0x2020. FIXME: |
| 700 | This is too magical. */ |
| 701 | os = lang_output_section_statement_lookup (".text"); |
| 702 | if (os->addr_tree == NULL) |
| 703 | os->addr_tree = exp_intop (0x20); |
| 704 | } |
| 705 | |
| 706 | /* We need to create a __DYNAMIC symbol. We don't do this in the |
| 707 | linker script because we want to set the value to the start of |
| 708 | the dynamic section if there is one, or to zero if there isn't |
| 709 | one. We need to create the symbol before calling |
| 710 | size_dynamic_sections, although we can't set the value until |
| 711 | afterward. */ |
| 712 | if (! link_info.relocatable) |
| 713 | { |
| 714 | hdyn = bfd_link_hash_lookup (link_info.hash, "__DYNAMIC", TRUE, FALSE, |
| 715 | FALSE); |
| 716 | if (hdyn == NULL) |
| 717 | einfo ("%P%F: bfd_link_hash_lookup: %E\n"); |
| 718 | if (! bfd_sunos_record_link_assignment (output_bfd, &link_info, |
| 719 | "__DYNAMIC")) |
| 720 | einfo ("%P%F: failed to record assignment to __DYNAMIC: %E\n"); |
| 721 | } |
| 722 | |
| 723 | /* If we are going to make any variable assignments, we need to let |
| 724 | the backend linker know about them in case the variables are |
| 725 | referred to by dynamic objects. */ |
| 726 | lang_for_each_statement (gld${EMULATION_NAME}_find_assignment); |
| 727 | |
| 728 | /* Let the backend linker work out the sizes of any sections |
| 729 | required by dynamic linking. */ |
| 730 | if (! bfd_sunos_size_dynamic_sections (output_bfd, &link_info, &sdyn, |
| 731 | &sneed, &srules)) |
| 732 | einfo ("%P%F: failed to set dynamic section sizes: %E\n"); |
| 733 | |
| 734 | if (sneed != NULL) |
| 735 | { |
| 736 | /* Set up the .need section. See the description of the ld_need |
| 737 | field in include/aout/sun4.h. */ |
| 738 | |
| 739 | need_entries = 0; |
| 740 | need_size = 0; |
| 741 | |
| 742 | lang_for_each_input_file (gld${EMULATION_NAME}_count_need); |
| 743 | |
| 744 | /* We should only have a .need section if we have at least one |
| 745 | dynamic object. */ |
| 746 | ASSERT (need_entries != 0); |
| 747 | |
| 748 | sneed->size = need_size; |
| 749 | sneed->contents = (bfd_byte *) xmalloc (need_size); |
| 750 | |
| 751 | need_contents = sneed->contents; |
| 752 | need_pinfo = sneed->contents; |
| 753 | need_pnames = sneed->contents + need_entries * 16; |
| 754 | |
| 755 | lang_for_each_input_file (gld${EMULATION_NAME}_set_need); |
| 756 | |
| 757 | ASSERT ((bfd_size_type) (need_pnames - sneed->contents) == need_size); |
| 758 | } |
| 759 | |
| 760 | if (srules != NULL) |
| 761 | { |
| 762 | /* Set up the .rules section. This is just a PATH like string |
| 763 | of the -L arguments given on the command line. We permit the |
| 764 | user to specify the directories using the -rpath command line |
| 765 | option. */ |
| 766 | if (command_line.rpath) |
| 767 | { |
| 768 | srules->size = strlen (command_line.rpath); |
| 769 | srules->contents = (bfd_byte *) command_line.rpath; |
| 770 | } |
| 771 | else |
| 772 | { |
| 773 | unsigned int size; |
| 774 | search_dirs_type *search; |
| 775 | |
| 776 | size = 0; |
| 777 | for (search = search_head; search != NULL; search = search->next) |
| 778 | if (search->cmdline) |
| 779 | size += strlen (search->name) + 1; |
| 780 | srules->size = size; |
| 781 | if (size > 0) |
| 782 | { |
| 783 | char *p; |
| 784 | |
| 785 | srules->contents = (bfd_byte *) xmalloc (size); |
| 786 | p = (char *) srules->contents; |
| 787 | *p = '\0'; |
| 788 | for (search = search_head; search != NULL; search = search->next) |
| 789 | { |
| 790 | if (search->cmdline) |
| 791 | { |
| 792 | if (p != (char *) srules->contents) |
| 793 | *p++ = ':'; |
| 794 | strcpy (p, search->name); |
| 795 | p += strlen (p); |
| 796 | } |
| 797 | } |
| 798 | } |
| 799 | } |
| 800 | } |
| 801 | |
| 802 | /* We must assign a value to __DYNAMIC. It should be zero if we are |
| 803 | not doing a dynamic link, or the start of the .dynamic section if |
| 804 | we are doing one. */ |
| 805 | if (! link_info.relocatable) |
| 806 | { |
| 807 | hdyn->type = bfd_link_hash_defined; |
| 808 | hdyn->u.def.value = 0; |
| 809 | if (sdyn != NULL) |
| 810 | hdyn->u.def.section = sdyn; |
| 811 | else |
| 812 | hdyn->u.def.section = bfd_abs_section_ptr; |
| 813 | } |
| 814 | |
| 815 | before_allocation_default (); |
| 816 | } |
| 817 | |
| 818 | /* This is called by the before_allocation routine via |
| 819 | lang_for_each_statement. It does one of two things: if the |
| 820 | variable find_assign is set, it sets found_assign if it finds an |
| 821 | assignment to that variable; otherwise it tells the backend linker |
| 822 | about all assignment statements, in case they are assignments to |
| 823 | symbols which are referred to by dynamic objects. */ |
| 824 | |
| 825 | static void |
| 826 | gld${EMULATION_NAME}_find_assignment (lang_statement_union_type *s) |
| 827 | { |
| 828 | if (s->header.type == lang_assignment_statement_enum |
| 829 | && (find_assign == NULL || ! found_assign)) |
| 830 | gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp); |
| 831 | } |
| 832 | |
| 833 | /* Look through an expression for an assignment statement. */ |
| 834 | |
| 835 | static void |
| 836 | gld${EMULATION_NAME}_find_exp_assignment (etree_type *exp) |
| 837 | { |
| 838 | switch (exp->type.node_class) |
| 839 | { |
| 840 | case etree_assign: |
| 841 | if (find_assign != NULL) |
| 842 | { |
| 843 | if (strcmp (find_assign, exp->assign.dst) == 0) |
| 844 | found_assign = TRUE; |
| 845 | return; |
| 846 | } |
| 847 | |
| 848 | if (strcmp (exp->assign.dst, ".") != 0) |
| 849 | { |
| 850 | if (! bfd_sunos_record_link_assignment (output_bfd, &link_info, |
| 851 | exp->assign.dst)) |
| 852 | einfo ("%P%F: failed to record assignment to %s: %E\n", |
| 853 | exp->assign.dst); |
| 854 | } |
| 855 | gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src); |
| 856 | break; |
| 857 | |
| 858 | case etree_binary: |
| 859 | gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs); |
| 860 | gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs); |
| 861 | break; |
| 862 | |
| 863 | case etree_trinary: |
| 864 | gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond); |
| 865 | gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs); |
| 866 | gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs); |
| 867 | break; |
| 868 | |
| 869 | case etree_unary: |
| 870 | gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child); |
| 871 | break; |
| 872 | |
| 873 | default: |
| 874 | break; |
| 875 | } |
| 876 | } |
| 877 | |
| 878 | /* Work out the size of the .need section, and the number of entries. |
| 879 | The backend will set the ld_need field of the dynamic linking |
| 880 | information to point to the .need section. See include/aout/sun4.h |
| 881 | for more information. */ |
| 882 | |
| 883 | static void |
| 884 | gld${EMULATION_NAME}_count_need (lang_input_statement_type *inp) |
| 885 | { |
| 886 | if (inp->the_bfd != NULL |
| 887 | && (inp->the_bfd->flags & DYNAMIC) != 0) |
| 888 | { |
| 889 | ++need_entries; |
| 890 | need_size += NEED_ENTRY_SIZE; |
| 891 | if (! inp->is_archive) |
| 892 | need_size += strlen (inp->filename) + 1; |
| 893 | else |
| 894 | { |
| 895 | ASSERT (inp->local_sym_name[0] == '-' |
| 896 | && inp->local_sym_name[1] == 'l'); |
| 897 | need_size += strlen (inp->local_sym_name + 2) + 1; |
| 898 | } |
| 899 | } |
| 900 | } |
| 901 | |
| 902 | /* Fill in the contents of the .need section. */ |
| 903 | |
| 904 | static void |
| 905 | gld${EMULATION_NAME}_set_need (lang_input_statement_type *inp) |
| 906 | { |
| 907 | if (inp->the_bfd != NULL |
| 908 | && (inp->the_bfd->flags & DYNAMIC) != 0) |
| 909 | { |
| 910 | bfd_size_type c; |
| 911 | |
| 912 | /* To really fill in the .need section contents, we need to know |
| 913 | the final file position of the section, but we don't. |
| 914 | Instead, we use offsets, and rely on the BFD backend to |
| 915 | finish the section up correctly. FIXME: Talk about lack of |
| 916 | referential locality. */ |
| 917 | bfd_put_32 (output_bfd, need_pnames - need_contents, need_pinfo); |
| 918 | if (! inp->is_archive) |
| 919 | { |
| 920 | bfd_put_32 (output_bfd, (bfd_vma) 0, need_pinfo + 4); |
| 921 | bfd_put_16 (output_bfd, (bfd_vma) 0, need_pinfo + 8); |
| 922 | bfd_put_16 (output_bfd, (bfd_vma) 0, need_pinfo + 10); |
| 923 | strcpy ((char *) need_pnames, inp->filename); |
| 924 | } |
| 925 | else |
| 926 | { |
| 927 | char *verstr; |
| 928 | int maj, min; |
| 929 | |
| 930 | bfd_put_32 (output_bfd, (bfd_vma) 0x80000000, need_pinfo + 4); |
| 931 | maj = 0; |
| 932 | min = 0; |
| 933 | verstr = strstr (inp->filename, ".so."); |
| 934 | if (verstr != NULL) |
| 935 | sscanf (verstr, ".so.%d.%d", &maj, &min); |
| 936 | bfd_put_16 (output_bfd, (bfd_vma) maj, need_pinfo + 8); |
| 937 | bfd_put_16 (output_bfd, (bfd_vma) min, need_pinfo + 10); |
| 938 | strcpy ((char *) need_pnames, inp->local_sym_name + 2); |
| 939 | } |
| 940 | |
| 941 | c = (need_pinfo - need_contents) / NEED_ENTRY_SIZE; |
| 942 | if (c + 1 >= need_entries) |
| 943 | bfd_put_32 (output_bfd, (bfd_vma) 0, need_pinfo + 12); |
| 944 | else |
| 945 | bfd_put_32 (output_bfd, (bfd_vma) (c + 1) * NEED_ENTRY_SIZE, |
| 946 | need_pinfo + 12); |
| 947 | |
| 948 | need_pinfo += NEED_ENTRY_SIZE; |
| 949 | need_pnames += strlen ((char *) need_pnames) + 1; |
| 950 | } |
| 951 | } |
| 952 | |
| 953 | static char * |
| 954 | gld${EMULATION_NAME}_get_script (int *isfile) |
| 955 | EOF |
| 956 | |
| 957 | if test -n "$COMPILE_IN" |
| 958 | then |
| 959 | # Scripts compiled in. |
| 960 | |
| 961 | # sed commands to quote an ld script as a C string. |
| 962 | sc="-f stringify.sed" |
| 963 | |
| 964 | cat >>e${EMULATION_NAME}.c <<EOF |
| 965 | { |
| 966 | *isfile = 0; |
| 967 | |
| 968 | if (link_info.relocatable && config.build_constructors) |
| 969 | return |
| 970 | EOF |
| 971 | sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c |
| 972 | echo ' ; else if (link_info.relocatable) return' >> e${EMULATION_NAME}.c |
| 973 | sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c |
| 974 | echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c |
| 975 | sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c |
| 976 | echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c |
| 977 | sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c |
| 978 | echo ' ; else return' >> e${EMULATION_NAME}.c |
| 979 | sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c |
| 980 | echo '; }' >> e${EMULATION_NAME}.c |
| 981 | |
| 982 | else |
| 983 | # Scripts read from the filesystem. |
| 984 | |
| 985 | cat >>e${EMULATION_NAME}.c <<EOF |
| 986 | { |
| 987 | *isfile = 1; |
| 988 | |
| 989 | if (link_info.relocatable && config.build_constructors) |
| 990 | return "ldscripts/${EMULATION_NAME}.xu"; |
| 991 | else if (link_info.relocatable) |
| 992 | return "ldscripts/${EMULATION_NAME}.xr"; |
| 993 | else if (!config.text_read_only) |
| 994 | return "ldscripts/${EMULATION_NAME}.xbn"; |
| 995 | else if (!config.magic_demand_paged) |
| 996 | return "ldscripts/${EMULATION_NAME}.xn"; |
| 997 | else |
| 998 | return "ldscripts/${EMULATION_NAME}.x"; |
| 999 | } |
| 1000 | EOF |
| 1001 | |
| 1002 | fi |
| 1003 | |
| 1004 | cat >>e${EMULATION_NAME}.c <<EOF |
| 1005 | |
| 1006 | struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation = |
| 1007 | { |
| 1008 | gld${EMULATION_NAME}_before_parse, |
| 1009 | syslib_default, |
| 1010 | hll_default, |
| 1011 | after_parse_default, |
| 1012 | gld${EMULATION_NAME}_after_open, |
| 1013 | after_allocation_default, |
| 1014 | set_output_arch_default, |
| 1015 | ldemul_default_target, |
| 1016 | gld${EMULATION_NAME}_before_allocation, |
| 1017 | gld${EMULATION_NAME}_get_script, |
| 1018 | "${EMULATION_NAME}", |
| 1019 | "${OUTPUT_FORMAT}", |
| 1020 | finish_default, |
| 1021 | gld${EMULATION_NAME}_create_output_section_statements, |
| 1022 | NULL, /* open dynamic archive */ |
| 1023 | NULL, /* place orphan */ |
| 1024 | gld${EMULATION_NAME}_set_symbols, |
| 1025 | NULL, /* parse args */ |
| 1026 | NULL, /* add_options */ |
| 1027 | NULL, /* handle_option */ |
| 1028 | NULL, /* unrecognized file */ |
| 1029 | NULL, /* list options */ |
| 1030 | NULL, /* recognized file */ |
| 1031 | NULL, /* find_potential_libraries */ |
| 1032 | NULL /* new_vers_pattern */ |
| 1033 | }; |
| 1034 | EOF |