| 1 | # This shell script emits a C file. -*- C -*- |
| 2 | # It does some substitutions. |
| 3 | # This file is now misnamed, because it supports both 32 bit and 64 bit |
| 4 | # ELF emulations. |
| 5 | test -z "${ELFSIZE}" && ELFSIZE=32 |
| 6 | if [ -z "$MACHINE" ]; then |
| 7 | OUTPUT_ARCH=${ARCH} |
| 8 | else |
| 9 | OUTPUT_ARCH=${ARCH}:${MACHINE} |
| 10 | fi |
| 11 | cat >e${EMULATION_NAME}.c <<EOF |
| 12 | /* This file is is generated by a shell script. DO NOT EDIT! */ |
| 13 | |
| 14 | /* ${ELFSIZE} bit ELF emulation code for ${EMULATION_NAME} |
| 15 | Copyright 1991, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, |
| 16 | 2002, 2003, 2004, 2005 Free Software Foundation, Inc. |
| 17 | Written by Steve Chamberlain <sac@cygnus.com> |
| 18 | ELF support by Ian Lance Taylor <ian@cygnus.com> |
| 19 | |
| 20 | This file is part of GLD, the Gnu Linker. |
| 21 | |
| 22 | This program is free software; you can redistribute it and/or modify |
| 23 | it under the terms of the GNU General Public License as published by |
| 24 | the Free Software Foundation; either version 2 of the License, or |
| 25 | (at your option) any later version. |
| 26 | |
| 27 | This program is distributed in the hope that it will be useful, |
| 28 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 29 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 30 | GNU General Public License for more details. |
| 31 | |
| 32 | You should have received a copy of the GNU General Public License |
| 33 | along with this program; if not, write to the Free Software |
| 34 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ |
| 35 | |
| 36 | #define TARGET_IS_${EMULATION_NAME} |
| 37 | |
| 38 | #include "config.h" |
| 39 | #include "bfd.h" |
| 40 | #include "sysdep.h" |
| 41 | #include "libiberty.h" |
| 42 | #include "safe-ctype.h" |
| 43 | #include "getopt.h" |
| 44 | |
| 45 | #include "bfdlink.h" |
| 46 | |
| 47 | #include "ld.h" |
| 48 | #include "ldmain.h" |
| 49 | #include "ldmisc.h" |
| 50 | #include "ldexp.h" |
| 51 | #include "ldlang.h" |
| 52 | #include "ldfile.h" |
| 53 | #include "ldemul.h" |
| 54 | #include <ldgram.h> |
| 55 | #include "elf/common.h" |
| 56 | |
| 57 | /* Declare functions used by various EXTRA_EM_FILEs. */ |
| 58 | static void gld${EMULATION_NAME}_before_parse (void); |
| 59 | static void gld${EMULATION_NAME}_after_open (void); |
| 60 | static void gld${EMULATION_NAME}_before_allocation (void); |
| 61 | static bfd_boolean gld${EMULATION_NAME}_place_orphan |
| 62 | (lang_input_statement_type *file, asection *s); |
| 63 | static void gld${EMULATION_NAME}_layout_sections_again (void); |
| 64 | static void gld${EMULATION_NAME}_strip_empty_sections (void); |
| 65 | static void gld${EMULATION_NAME}_provide_init_fini_syms (void); |
| 66 | static void gld${EMULATION_NAME}_finish (void) ATTRIBUTE_UNUSED; |
| 67 | |
| 68 | EOF |
| 69 | |
| 70 | if [ "x${USE_LIBPATH}" = xyes ] ; then |
| 71 | case ${target} in |
| 72 | *-*-linux-*) |
| 73 | cat >>e${EMULATION_NAME}.c <<EOF |
| 74 | #ifdef HAVE_GLOB |
| 75 | #include <glob.h> |
| 76 | #endif |
| 77 | EOF |
| 78 | ;; |
| 79 | esac |
| 80 | fi |
| 81 | |
| 82 | # Import any needed special functions and/or overrides. |
| 83 | # |
| 84 | if test -n "$EXTRA_EM_FILE" ; then |
| 85 | . ${srcdir}/emultempl/${EXTRA_EM_FILE}.em |
| 86 | fi |
| 87 | |
| 88 | # Functions in this file can be overridden by setting the LDEMUL_* shell |
| 89 | # variables. If the name of the overriding function is the same as is |
| 90 | # defined in this file, then don't output this file's version. |
| 91 | # If a different overriding name is given then output the standard function |
| 92 | # as presumably it is called from the overriding function. |
| 93 | # |
| 94 | if test x"$LDEMUL_BEFORE_PARSE" != xgld"$EMULATION_NAME"_before_parse; then |
| 95 | cat >>e${EMULATION_NAME}.c <<EOF |
| 96 | |
| 97 | static void |
| 98 | gld${EMULATION_NAME}_before_parse (void) |
| 99 | { |
| 100 | ldfile_set_output_arch ("${OUTPUT_ARCH}", bfd_arch_`echo ${ARCH} | sed -e 's/:.*//'`); |
| 101 | config.dynamic_link = ${DYNAMIC_LINK-TRUE}; |
| 102 | config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo TRUE ; else echo FALSE ; fi`; |
| 103 | } |
| 104 | |
| 105 | EOF |
| 106 | fi |
| 107 | |
| 108 | if test x"$LDEMUL_RECOGNIZED_FILE" != xgld"${EMULATION_NAME}"_load_symbols; then |
| 109 | cat >>e${EMULATION_NAME}.c <<EOF |
| 110 | /* Handle as_needed DT_NEEDED. */ |
| 111 | |
| 112 | static bfd_boolean |
| 113 | gld${EMULATION_NAME}_load_symbols (lang_input_statement_type *entry) |
| 114 | { |
| 115 | int class = 0; |
| 116 | |
| 117 | /* Tell the ELF linker that we don't want the output file to have a |
| 118 | DT_NEEDED entry for this file, unless it is used to resolve |
| 119 | references in a regular object. */ |
| 120 | if (entry->as_needed) |
| 121 | class = DYN_AS_NEEDED; |
| 122 | |
| 123 | /* Tell the ELF linker that we don't want the output file to have a |
| 124 | DT_NEEDED entry for any dynamic library in DT_NEEDED tags from |
| 125 | this file at all. */ |
| 126 | if (!entry->add_needed) |
| 127 | class |= DYN_NO_ADD_NEEDED; |
| 128 | |
| 129 | if (!class |
| 130 | || (bfd_get_file_flags (entry->the_bfd) & DYNAMIC) == 0) |
| 131 | return FALSE; |
| 132 | |
| 133 | bfd_elf_set_dyn_lib_class (entry->the_bfd, class); |
| 134 | |
| 135 | /* Continue on with normal load_symbols processing. */ |
| 136 | return FALSE; |
| 137 | } |
| 138 | EOF |
| 139 | fi |
| 140 | |
| 141 | cat >>e${EMULATION_NAME}.c <<EOF |
| 142 | |
| 143 | /* These variables are required to pass information back and forth |
| 144 | between after_open and check_needed and stat_needed and vercheck. */ |
| 145 | |
| 146 | static struct bfd_link_needed_list *global_needed; |
| 147 | static struct stat global_stat; |
| 148 | static bfd_boolean global_found; |
| 149 | static struct bfd_link_needed_list *global_vercheck_needed; |
| 150 | static bfd_boolean global_vercheck_failed; |
| 151 | |
| 152 | |
| 153 | /* On Linux, it's possible to have different versions of the same |
| 154 | shared library linked against different versions of libc. The |
| 155 | dynamic linker somehow tags which libc version to use in |
| 156 | /etc/ld.so.cache, and, based on the libc that it sees in the |
| 157 | executable, chooses which version of the shared library to use. |
| 158 | |
| 159 | We try to do a similar check here by checking whether this shared |
| 160 | library needs any other shared libraries which may conflict with |
| 161 | libraries we have already included in the link. If it does, we |
| 162 | skip it, and try to find another shared library farther on down the |
| 163 | link path. |
| 164 | |
| 165 | This is called via lang_for_each_input_file. |
| 166 | GLOBAL_VERCHECK_NEEDED is the list of objects needed by the object |
| 167 | which we are checking. This sets GLOBAL_VERCHECK_FAILED if we find |
| 168 | a conflicting version. */ |
| 169 | |
| 170 | static void |
| 171 | gld${EMULATION_NAME}_vercheck (lang_input_statement_type *s) |
| 172 | { |
| 173 | const char *soname; |
| 174 | struct bfd_link_needed_list *l; |
| 175 | |
| 176 | if (global_vercheck_failed) |
| 177 | return; |
| 178 | if (s->the_bfd == NULL |
| 179 | || (bfd_get_file_flags (s->the_bfd) & DYNAMIC) == 0) |
| 180 | return; |
| 181 | |
| 182 | soname = bfd_elf_get_dt_soname (s->the_bfd); |
| 183 | if (soname == NULL) |
| 184 | soname = lbasename (bfd_get_filename (s->the_bfd)); |
| 185 | |
| 186 | for (l = global_vercheck_needed; l != NULL; l = l->next) |
| 187 | { |
| 188 | const char *suffix; |
| 189 | |
| 190 | if (strcmp (soname, l->name) == 0) |
| 191 | { |
| 192 | /* Probably can't happen, but it's an easy check. */ |
| 193 | continue; |
| 194 | } |
| 195 | |
| 196 | if (strchr (l->name, '/') != NULL) |
| 197 | continue; |
| 198 | |
| 199 | suffix = strstr (l->name, ".so."); |
| 200 | if (suffix == NULL) |
| 201 | continue; |
| 202 | |
| 203 | suffix += sizeof ".so." - 1; |
| 204 | |
| 205 | if (strncmp (soname, l->name, suffix - l->name) == 0) |
| 206 | { |
| 207 | /* Here we know that S is a dynamic object FOO.SO.VER1, and |
| 208 | the object we are considering needs a dynamic object |
| 209 | FOO.SO.VER2, and VER1 and VER2 are different. This |
| 210 | appears to be a version mismatch, so we tell the caller |
| 211 | to try a different version of this library. */ |
| 212 | global_vercheck_failed = TRUE; |
| 213 | return; |
| 214 | } |
| 215 | } |
| 216 | } |
| 217 | |
| 218 | |
| 219 | /* See if an input file matches a DT_NEEDED entry by running stat on |
| 220 | the file. */ |
| 221 | |
| 222 | static void |
| 223 | gld${EMULATION_NAME}_stat_needed (lang_input_statement_type *s) |
| 224 | { |
| 225 | struct stat st; |
| 226 | const char *suffix; |
| 227 | const char *soname; |
| 228 | |
| 229 | if (global_found) |
| 230 | return; |
| 231 | if (s->the_bfd == NULL) |
| 232 | return; |
| 233 | if (s->as_needed |
| 234 | && (bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0) |
| 235 | return; |
| 236 | |
| 237 | if (bfd_stat (s->the_bfd, &st) != 0) |
| 238 | { |
| 239 | einfo ("%P:%B: bfd_stat failed: %E\n", s->the_bfd); |
| 240 | return; |
| 241 | } |
| 242 | |
| 243 | /* Some operating systems, e.g. Windows, do not provide a meaningful |
| 244 | st_ino; they always set it to zero. (Windows does provide a |
| 245 | meaningful st_dev.) Do not indicate a duplicate library in that |
| 246 | case. While there is no guarantee that a system that provides |
| 247 | meaningful inode numbers will never set st_ino to zero, this is |
| 248 | merely an optimization, so we do not need to worry about false |
| 249 | negatives. */ |
| 250 | if (st.st_dev == global_stat.st_dev |
| 251 | && st.st_ino == global_stat.st_ino |
| 252 | && st.st_ino != 0) |
| 253 | { |
| 254 | global_found = TRUE; |
| 255 | return; |
| 256 | } |
| 257 | |
| 258 | /* We issue a warning if it looks like we are including two |
| 259 | different versions of the same shared library. For example, |
| 260 | there may be a problem if -lc picks up libc.so.6 but some other |
| 261 | shared library has a DT_NEEDED entry of libc.so.5. This is a |
| 262 | heuristic test, and it will only work if the name looks like |
| 263 | NAME.so.VERSION. FIXME: Depending on file names is error-prone. |
| 264 | If we really want to issue warnings about mixing version numbers |
| 265 | of shared libraries, we need to find a better way. */ |
| 266 | |
| 267 | if (strchr (global_needed->name, '/') != NULL) |
| 268 | return; |
| 269 | suffix = strstr (global_needed->name, ".so."); |
| 270 | if (suffix == NULL) |
| 271 | return; |
| 272 | suffix += sizeof ".so." - 1; |
| 273 | |
| 274 | soname = bfd_elf_get_dt_soname (s->the_bfd); |
| 275 | if (soname == NULL) |
| 276 | soname = lbasename (s->filename); |
| 277 | |
| 278 | if (strncmp (soname, global_needed->name, suffix - global_needed->name) == 0) |
| 279 | einfo ("%P: warning: %s, needed by %B, may conflict with %s\n", |
| 280 | global_needed->name, global_needed->by, soname); |
| 281 | } |
| 282 | |
| 283 | struct dt_needed |
| 284 | { |
| 285 | bfd *by; |
| 286 | const char *name; |
| 287 | }; |
| 288 | |
| 289 | /* This function is called for each possible name for a dynamic object |
| 290 | named by a DT_NEEDED entry. The FORCE parameter indicates whether |
| 291 | to skip the check for a conflicting version. */ |
| 292 | |
| 293 | static bfd_boolean |
| 294 | gld${EMULATION_NAME}_try_needed (struct dt_needed *needed, |
| 295 | int force) |
| 296 | { |
| 297 | bfd *abfd; |
| 298 | const char *name = needed->name; |
| 299 | const char *soname; |
| 300 | int class; |
| 301 | |
| 302 | abfd = bfd_openr (name, bfd_get_target (output_bfd)); |
| 303 | if (abfd == NULL) |
| 304 | return FALSE; |
| 305 | if (! bfd_check_format (abfd, bfd_object)) |
| 306 | { |
| 307 | bfd_close (abfd); |
| 308 | return FALSE; |
| 309 | } |
| 310 | if ((bfd_get_file_flags (abfd) & DYNAMIC) == 0) |
| 311 | { |
| 312 | bfd_close (abfd); |
| 313 | return FALSE; |
| 314 | } |
| 315 | |
| 316 | /* For DT_NEEDED, they have to match. */ |
| 317 | if (abfd->xvec != output_bfd->xvec) |
| 318 | { |
| 319 | bfd_close (abfd); |
| 320 | return FALSE; |
| 321 | } |
| 322 | |
| 323 | /* Check whether this object would include any conflicting library |
| 324 | versions. If FORCE is set, then we skip this check; we use this |
| 325 | the second time around, if we couldn't find any compatible |
| 326 | instance of the shared library. */ |
| 327 | |
| 328 | if (! force) |
| 329 | { |
| 330 | struct bfd_link_needed_list *needed; |
| 331 | |
| 332 | if (! bfd_elf_get_bfd_needed_list (abfd, &needed)) |
| 333 | einfo ("%F%P:%B: bfd_elf_get_bfd_needed_list failed: %E\n", abfd); |
| 334 | |
| 335 | if (needed != NULL) |
| 336 | { |
| 337 | global_vercheck_needed = needed; |
| 338 | global_vercheck_failed = FALSE; |
| 339 | lang_for_each_input_file (gld${EMULATION_NAME}_vercheck); |
| 340 | if (global_vercheck_failed) |
| 341 | { |
| 342 | bfd_close (abfd); |
| 343 | /* Return FALSE to force the caller to move on to try |
| 344 | another file on the search path. */ |
| 345 | return FALSE; |
| 346 | } |
| 347 | |
| 348 | /* But wait! It gets much worse. On Linux, if a shared |
| 349 | library does not use libc at all, we are supposed to skip |
| 350 | it the first time around in case we encounter a shared |
| 351 | library later on with the same name which does use the |
| 352 | version of libc that we want. This is much too horrible |
| 353 | to use on any system other than Linux. */ |
| 354 | |
| 355 | EOF |
| 356 | case ${target} in |
| 357 | *-*-linux-*) |
| 358 | cat >>e${EMULATION_NAME}.c <<EOF |
| 359 | { |
| 360 | struct bfd_link_needed_list *l; |
| 361 | |
| 362 | for (l = needed; l != NULL; l = l->next) |
| 363 | if (strncmp (l->name, "libc.so", 7) == 0) |
| 364 | break; |
| 365 | if (l == NULL) |
| 366 | { |
| 367 | bfd_close (abfd); |
| 368 | return FALSE; |
| 369 | } |
| 370 | } |
| 371 | |
| 372 | EOF |
| 373 | ;; |
| 374 | esac |
| 375 | cat >>e${EMULATION_NAME}.c <<EOF |
| 376 | } |
| 377 | } |
| 378 | |
| 379 | /* We've found a dynamic object matching the DT_NEEDED entry. */ |
| 380 | |
| 381 | /* We have already checked that there is no other input file of the |
| 382 | same name. We must now check again that we are not including the |
| 383 | same file twice. We need to do this because on many systems |
| 384 | libc.so is a symlink to, e.g., libc.so.1. The SONAME entry will |
| 385 | reference libc.so.1. If we have already included libc.so, we |
| 386 | don't want to include libc.so.1 if they are the same file, and we |
| 387 | can only check that using stat. */ |
| 388 | |
| 389 | if (bfd_stat (abfd, &global_stat) != 0) |
| 390 | einfo ("%F%P:%B: bfd_stat failed: %E\n", abfd); |
| 391 | |
| 392 | /* First strip off everything before the last '/'. */ |
| 393 | soname = lbasename (abfd->filename); |
| 394 | |
| 395 | if (trace_file_tries) |
| 396 | info_msg (_("found %s at %s\n"), soname, name); |
| 397 | |
| 398 | global_found = FALSE; |
| 399 | lang_for_each_input_file (gld${EMULATION_NAME}_stat_needed); |
| 400 | if (global_found) |
| 401 | { |
| 402 | /* Return TRUE to indicate that we found the file, even though |
| 403 | we aren't going to do anything with it. */ |
| 404 | return TRUE; |
| 405 | } |
| 406 | |
| 407 | /* Specify the soname to use. */ |
| 408 | bfd_elf_set_dt_needed_name (abfd, soname); |
| 409 | |
| 410 | /* Tell the ELF linker that we don't want the output file to have a |
| 411 | DT_NEEDED entry for this file, unless it is used to resolve |
| 412 | references in a regular object. */ |
| 413 | class = DYN_DT_NEEDED; |
| 414 | |
| 415 | /* Tell the ELF linker that we don't want the output file to have a |
| 416 | DT_NEEDED entry for this file at all if the entry is from a file |
| 417 | with DYN_NO_ADD_NEEDED. */ |
| 418 | if (needed->by != NULL |
| 419 | && (bfd_elf_get_dyn_lib_class (needed->by) & DYN_NO_ADD_NEEDED) != 0) |
| 420 | class |= DYN_NO_NEEDED | DYN_NO_ADD_NEEDED; |
| 421 | |
| 422 | bfd_elf_set_dyn_lib_class (abfd, class); |
| 423 | |
| 424 | /* Add this file into the symbol table. */ |
| 425 | if (! bfd_link_add_symbols (abfd, &link_info)) |
| 426 | einfo ("%F%B: could not read symbols: %E\n", abfd); |
| 427 | |
| 428 | return TRUE; |
| 429 | } |
| 430 | |
| 431 | |
| 432 | /* Search for a needed file in a path. */ |
| 433 | |
| 434 | static bfd_boolean |
| 435 | gld${EMULATION_NAME}_search_needed (const char *path, |
| 436 | struct dt_needed *n, int force) |
| 437 | { |
| 438 | const char *s; |
| 439 | const char *name = n->name; |
| 440 | size_t len; |
| 441 | struct dt_needed needed; |
| 442 | |
| 443 | if (name[0] == '/') |
| 444 | return gld${EMULATION_NAME}_try_needed (n, force); |
| 445 | |
| 446 | if (path == NULL || *path == '\0') |
| 447 | return FALSE; |
| 448 | |
| 449 | needed.by = n->by; |
| 450 | needed.name = n->name; |
| 451 | |
| 452 | len = strlen (name); |
| 453 | while (1) |
| 454 | { |
| 455 | char *filename, *sset; |
| 456 | |
| 457 | s = strchr (path, ':'); |
| 458 | if (s == NULL) |
| 459 | s = path + strlen (path); |
| 460 | |
| 461 | filename = (char *) xmalloc (s - path + len + 2); |
| 462 | if (s == path) |
| 463 | sset = filename; |
| 464 | else |
| 465 | { |
| 466 | memcpy (filename, path, s - path); |
| 467 | filename[s - path] = '/'; |
| 468 | sset = filename + (s - path) + 1; |
| 469 | } |
| 470 | strcpy (sset, name); |
| 471 | |
| 472 | needed.name = filename; |
| 473 | if (gld${EMULATION_NAME}_try_needed (&needed, force)) |
| 474 | return TRUE; |
| 475 | |
| 476 | free (filename); |
| 477 | |
| 478 | if (*s == '\0') |
| 479 | break; |
| 480 | path = s + 1; |
| 481 | } |
| 482 | |
| 483 | return FALSE; |
| 484 | } |
| 485 | |
| 486 | EOF |
| 487 | if [ "x${USE_LIBPATH}" = xyes ] ; then |
| 488 | cat >>e${EMULATION_NAME}.c <<EOF |
| 489 | |
| 490 | /* Add the sysroot to every entry in a colon-separated path. */ |
| 491 | |
| 492 | static char * |
| 493 | gld${EMULATION_NAME}_add_sysroot (const char *path) |
| 494 | { |
| 495 | int len, colons, i; |
| 496 | char *ret, *p; |
| 497 | |
| 498 | len = strlen (path); |
| 499 | colons = 0; |
| 500 | i = 0; |
| 501 | while (path[i]) |
| 502 | if (path[i++] == ':') |
| 503 | colons++; |
| 504 | |
| 505 | if (path[i]) |
| 506 | colons++; |
| 507 | |
| 508 | len = len + (colons + 1) * strlen (ld_sysroot); |
| 509 | ret = xmalloc (len + 1); |
| 510 | strcpy (ret, ld_sysroot); |
| 511 | p = ret + strlen (ret); |
| 512 | i = 0; |
| 513 | while (path[i]) |
| 514 | if (path[i] == ':') |
| 515 | { |
| 516 | *p++ = path[i++]; |
| 517 | strcpy (p, ld_sysroot); |
| 518 | p = p + strlen (p); |
| 519 | } |
| 520 | else |
| 521 | *p++ = path[i++]; |
| 522 | |
| 523 | *p = 0; |
| 524 | return ret; |
| 525 | } |
| 526 | |
| 527 | EOF |
| 528 | case ${target} in |
| 529 | *-*-linux-*) |
| 530 | cat >>e${EMULATION_NAME}.c <<EOF |
| 531 | /* For a native linker, check the file /etc/ld.so.conf for directories |
| 532 | in which we may find shared libraries. /etc/ld.so.conf is really |
| 533 | only meaningful on Linux. */ |
| 534 | |
| 535 | struct gld${EMULATION_NAME}_ld_so_conf |
| 536 | { |
| 537 | char *path; |
| 538 | size_t len, alloc; |
| 539 | }; |
| 540 | |
| 541 | static void |
| 542 | gld${EMULATION_NAME}_parse_ld_so_conf |
| 543 | (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename); |
| 544 | |
| 545 | static void |
| 546 | gld${EMULATION_NAME}_parse_ld_so_conf_include |
| 547 | (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename, |
| 548 | const char *pattern) |
| 549 | { |
| 550 | char *newp = NULL; |
| 551 | #ifdef HAVE_GLOB |
| 552 | glob_t gl; |
| 553 | #endif |
| 554 | |
| 555 | if (pattern[0] != '/') |
| 556 | { |
| 557 | char *p = strrchr (filename, '/'); |
| 558 | size_t patlen = strlen (pattern) + 1; |
| 559 | |
| 560 | newp = xmalloc (p - filename + 1 + patlen); |
| 561 | memcpy (newp, filename, p - filename + 1); |
| 562 | memcpy (newp + (p - filename + 1), pattern, patlen); |
| 563 | pattern = newp; |
| 564 | } |
| 565 | |
| 566 | #ifdef HAVE_GLOB |
| 567 | if (glob (pattern, 0, NULL, &gl) == 0) |
| 568 | { |
| 569 | size_t i; |
| 570 | |
| 571 | for (i = 0; i < gl.gl_pathc; ++i) |
| 572 | gld${EMULATION_NAME}_parse_ld_so_conf (info, gl.gl_pathv[i]); |
| 573 | globfree (&gl); |
| 574 | } |
| 575 | #else |
| 576 | /* If we do not have glob, treat the pattern as a literal filename. */ |
| 577 | gld${EMULATION_NAME}_parse_ld_so_conf (info, pattern); |
| 578 | #endif |
| 579 | |
| 580 | if (newp) |
| 581 | free (newp); |
| 582 | } |
| 583 | |
| 584 | static void |
| 585 | gld${EMULATION_NAME}_parse_ld_so_conf |
| 586 | (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename) |
| 587 | { |
| 588 | FILE *f = fopen (filename, FOPEN_RT); |
| 589 | char *line; |
| 590 | size_t linelen; |
| 591 | |
| 592 | if (f == NULL) |
| 593 | return; |
| 594 | |
| 595 | linelen = 256; |
| 596 | line = xmalloc (linelen); |
| 597 | do |
| 598 | { |
| 599 | char *p = line, *q; |
| 600 | |
| 601 | /* Normally this would use getline(3), but we need to be portable. */ |
| 602 | while ((q = fgets (p, linelen - (p - line), f)) != NULL |
| 603 | && strlen (q) == linelen - (p - line) - 1 |
| 604 | && line[linelen - 2] != '\n') |
| 605 | { |
| 606 | line = xrealloc (line, 2 * linelen); |
| 607 | p = line + linelen - 1; |
| 608 | linelen += linelen; |
| 609 | } |
| 610 | |
| 611 | if (q == NULL && p == line) |
| 612 | break; |
| 613 | |
| 614 | p = strchr (line, '\n'); |
| 615 | if (p) |
| 616 | *p = '\0'; |
| 617 | |
| 618 | /* Because the file format does not know any form of quoting we |
| 619 | can search forward for the next '#' character and if found |
| 620 | make it terminating the line. */ |
| 621 | p = strchr (line, '#'); |
| 622 | if (p) |
| 623 | *p = '\0'; |
| 624 | |
| 625 | /* Remove leading whitespace. NUL is no whitespace character. */ |
| 626 | p = line; |
| 627 | while (*p == ' ' || *p == '\f' || *p == '\r' || *p == '\t' || *p == '\v') |
| 628 | ++p; |
| 629 | |
| 630 | /* If the line is blank it is ignored. */ |
| 631 | if (p[0] == '\0') |
| 632 | continue; |
| 633 | |
| 634 | if (!strncmp (p, "include", 7) && (p[7] == ' ' || p[7] == '\t')) |
| 635 | { |
| 636 | char *dir, c; |
| 637 | p += 8; |
| 638 | do |
| 639 | { |
| 640 | while (*p == ' ' || *p == '\t') |
| 641 | ++p; |
| 642 | |
| 643 | if (*p == '\0') |
| 644 | break; |
| 645 | |
| 646 | dir = p; |
| 647 | |
| 648 | while (*p != ' ' && *p != '\t' && *p) |
| 649 | ++p; |
| 650 | |
| 651 | c = *p; |
| 652 | *p++ = '\0'; |
| 653 | if (dir[0] != '\0') |
| 654 | gld${EMULATION_NAME}_parse_ld_so_conf_include (info, filename, |
| 655 | dir); |
| 656 | } |
| 657 | while (c != '\0'); |
| 658 | } |
| 659 | else |
| 660 | { |
| 661 | char *dir = p; |
| 662 | while (*p && *p != '=' && *p != ' ' && *p != '\t' && *p != '\f' |
| 663 | && *p != '\r' && *p != '\v') |
| 664 | ++p; |
| 665 | |
| 666 | while (p != dir && p[-1] == '/') |
| 667 | --p; |
| 668 | if (info->path == NULL) |
| 669 | { |
| 670 | info->alloc = p - dir + 1 + 256; |
| 671 | info->path = xmalloc (info->alloc); |
| 672 | info->len = 0; |
| 673 | } |
| 674 | else |
| 675 | { |
| 676 | if (info->len + 1 + (p - dir) >= info->alloc) |
| 677 | { |
| 678 | info->alloc += p - dir + 256; |
| 679 | info->path = xrealloc (info->path, info->alloc); |
| 680 | } |
| 681 | info->path[info->len++] = ':'; |
| 682 | } |
| 683 | memcpy (info->path + info->len, dir, p - dir); |
| 684 | info->len += p - dir; |
| 685 | info->path[info->len] = '\0'; |
| 686 | } |
| 687 | } |
| 688 | while (! feof (f)); |
| 689 | free (line); |
| 690 | fclose (f); |
| 691 | } |
| 692 | |
| 693 | static bfd_boolean |
| 694 | gld${EMULATION_NAME}_check_ld_so_conf (const char *name, int force) |
| 695 | { |
| 696 | static bfd_boolean initialized; |
| 697 | static char *ld_so_conf; |
| 698 | struct dt_needed needed; |
| 699 | |
| 700 | if (! initialized) |
| 701 | { |
| 702 | char *tmppath; |
| 703 | struct gld${EMULATION_NAME}_ld_so_conf info; |
| 704 | |
| 705 | tmppath = concat (ld_sysroot, "/etc/ld.so.conf", NULL); |
| 706 | info.path = NULL; |
| 707 | info.len = info.alloc = 0; |
| 708 | gld${EMULATION_NAME}_parse_ld_so_conf (&info, tmppath); |
| 709 | free (tmppath); |
| 710 | if (info.path) |
| 711 | { |
| 712 | char *d = gld${EMULATION_NAME}_add_sysroot (info.path); |
| 713 | free (info.path); |
| 714 | ld_so_conf = d; |
| 715 | } |
| 716 | initialized = TRUE; |
| 717 | } |
| 718 | |
| 719 | if (ld_so_conf == NULL) |
| 720 | return FALSE; |
| 721 | |
| 722 | |
| 723 | needed.by = NULL; |
| 724 | needed.name = name; |
| 725 | return gld${EMULATION_NAME}_search_needed (ld_so_conf, &needed, force); |
| 726 | } |
| 727 | |
| 728 | EOF |
| 729 | # Linux |
| 730 | ;; |
| 731 | esac |
| 732 | fi |
| 733 | cat >>e${EMULATION_NAME}.c <<EOF |
| 734 | |
| 735 | /* See if an input file matches a DT_NEEDED entry by name. */ |
| 736 | |
| 737 | static void |
| 738 | gld${EMULATION_NAME}_check_needed (lang_input_statement_type *s) |
| 739 | { |
| 740 | if (global_found) |
| 741 | return; |
| 742 | |
| 743 | /* If this input file was an as-needed entry, and wasn't found to be |
| 744 | needed at the stage it was linked, then don't say we have loaded it. */ |
| 745 | if (s->as_needed |
| 746 | && (s->the_bfd == NULL |
| 747 | || (bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0)) |
| 748 | return; |
| 749 | |
| 750 | if (s->filename != NULL) |
| 751 | { |
| 752 | const char *f; |
| 753 | |
| 754 | if (strcmp (s->filename, global_needed->name) == 0) |
| 755 | { |
| 756 | global_found = TRUE; |
| 757 | return; |
| 758 | } |
| 759 | |
| 760 | if (s->search_dirs_flag) |
| 761 | { |
| 762 | f = strrchr (s->filename, '/'); |
| 763 | if (f != NULL |
| 764 | && strcmp (f + 1, global_needed->name) == 0) |
| 765 | { |
| 766 | global_found = TRUE; |
| 767 | return; |
| 768 | } |
| 769 | } |
| 770 | } |
| 771 | |
| 772 | if (s->the_bfd != NULL) |
| 773 | { |
| 774 | const char *soname; |
| 775 | |
| 776 | soname = bfd_elf_get_dt_soname (s->the_bfd); |
| 777 | if (soname != NULL |
| 778 | && strcmp (soname, global_needed->name) == 0) |
| 779 | { |
| 780 | global_found = TRUE; |
| 781 | return; |
| 782 | } |
| 783 | } |
| 784 | } |
| 785 | |
| 786 | EOF |
| 787 | |
| 788 | if test x"$LDEMUL_AFTER_OPEN" != xgld"$EMULATION_NAME"_after_open; then |
| 789 | cat >>e${EMULATION_NAME}.c <<EOF |
| 790 | |
| 791 | /* This is called after all the input files have been opened. */ |
| 792 | |
| 793 | static void |
| 794 | gld${EMULATION_NAME}_after_open (void) |
| 795 | { |
| 796 | struct bfd_link_needed_list *needed, *l; |
| 797 | |
| 798 | /* We only need to worry about this when doing a final link. */ |
| 799 | if (link_info.relocatable || !link_info.executable) |
| 800 | return; |
| 801 | |
| 802 | /* Get the list of files which appear in DT_NEEDED entries in |
| 803 | dynamic objects included in the link (often there will be none). |
| 804 | For each such file, we want to track down the corresponding |
| 805 | library, and include the symbol table in the link. This is what |
| 806 | the runtime dynamic linker will do. Tracking the files down here |
| 807 | permits one dynamic object to include another without requiring |
| 808 | special action by the person doing the link. Note that the |
| 809 | needed list can actually grow while we are stepping through this |
| 810 | loop. */ |
| 811 | needed = bfd_elf_get_needed_list (output_bfd, &link_info); |
| 812 | for (l = needed; l != NULL; l = l->next) |
| 813 | { |
| 814 | struct bfd_link_needed_list *ll; |
| 815 | struct dt_needed n, nn; |
| 816 | int force; |
| 817 | |
| 818 | /* If the lib that needs this one was --as-needed and wasn't |
| 819 | found to be needed, then this lib isn't needed either. */ |
| 820 | if (l->by != NULL |
| 821 | && (bfd_elf_get_dyn_lib_class (l->by) & DYN_AS_NEEDED) != 0) |
| 822 | continue; |
| 823 | |
| 824 | /* If we've already seen this file, skip it. */ |
| 825 | for (ll = needed; ll != l; ll = ll->next) |
| 826 | if ((ll->by == NULL |
| 827 | || (bfd_elf_get_dyn_lib_class (ll->by) & DYN_AS_NEEDED) == 0) |
| 828 | && strcmp (ll->name, l->name) == 0) |
| 829 | break; |
| 830 | if (ll != l) |
| 831 | continue; |
| 832 | |
| 833 | /* See if this file was included in the link explicitly. */ |
| 834 | global_needed = l; |
| 835 | global_found = FALSE; |
| 836 | lang_for_each_input_file (gld${EMULATION_NAME}_check_needed); |
| 837 | if (global_found) |
| 838 | continue; |
| 839 | |
| 840 | n.by = l->by; |
| 841 | n.name = l->name; |
| 842 | nn.by = l->by; |
| 843 | if (trace_file_tries) |
| 844 | info_msg (_("%s needed by %B\n"), l->name, l->by); |
| 845 | |
| 846 | /* We need to find this file and include the symbol table. We |
| 847 | want to search for the file in the same way that the dynamic |
| 848 | linker will search. That means that we want to use |
| 849 | rpath_link, rpath, then the environment variable |
| 850 | LD_LIBRARY_PATH (native only), then the DT_RPATH/DT_RUNPATH |
| 851 | entries (native only), then the linker script LIB_SEARCH_DIRS. |
| 852 | We do not search using the -L arguments. |
| 853 | |
| 854 | We search twice. The first time, we skip objects which may |
| 855 | introduce version mismatches. The second time, we force |
| 856 | their use. See gld${EMULATION_NAME}_vercheck comment. */ |
| 857 | for (force = 0; force < 2; force++) |
| 858 | { |
| 859 | size_t len; |
| 860 | search_dirs_type *search; |
| 861 | EOF |
| 862 | if [ "x${NATIVE}" = xyes ] ; then |
| 863 | cat >>e${EMULATION_NAME}.c <<EOF |
| 864 | const char *lib_path; |
| 865 | EOF |
| 866 | fi |
| 867 | if [ "x${USE_LIBPATH}" = xyes ] ; then |
| 868 | cat >>e${EMULATION_NAME}.c <<EOF |
| 869 | struct bfd_link_needed_list *rp; |
| 870 | int found; |
| 871 | EOF |
| 872 | fi |
| 873 | cat >>e${EMULATION_NAME}.c <<EOF |
| 874 | |
| 875 | if (gld${EMULATION_NAME}_search_needed (command_line.rpath_link, |
| 876 | &n, force)) |
| 877 | break; |
| 878 | EOF |
| 879 | if [ "x${USE_LIBPATH}" = xyes ] ; then |
| 880 | cat >>e${EMULATION_NAME}.c <<EOF |
| 881 | if (gld${EMULATION_NAME}_search_needed (command_line.rpath, |
| 882 | &n, force)) |
| 883 | break; |
| 884 | EOF |
| 885 | fi |
| 886 | if [ "x${NATIVE}" = xyes ] ; then |
| 887 | cat >>e${EMULATION_NAME}.c <<EOF |
| 888 | if (command_line.rpath_link == NULL |
| 889 | && command_line.rpath == NULL) |
| 890 | { |
| 891 | lib_path = (const char *) getenv ("LD_RUN_PATH"); |
| 892 | if (gld${EMULATION_NAME}_search_needed (lib_path, &n, |
| 893 | force)) |
| 894 | break; |
| 895 | } |
| 896 | lib_path = (const char *) getenv ("LD_LIBRARY_PATH"); |
| 897 | if (gld${EMULATION_NAME}_search_needed (lib_path, &n, force)) |
| 898 | break; |
| 899 | EOF |
| 900 | fi |
| 901 | if [ "x${USE_LIBPATH}" = xyes ] ; then |
| 902 | cat >>e${EMULATION_NAME}.c <<EOF |
| 903 | found = 0; |
| 904 | rp = bfd_elf_get_runpath_list (output_bfd, &link_info); |
| 905 | for (; !found && rp != NULL; rp = rp->next) |
| 906 | { |
| 907 | char *tmpname = gld${EMULATION_NAME}_add_sysroot (rp->name); |
| 908 | found = (rp->by == l->by |
| 909 | && gld${EMULATION_NAME}_search_needed (tmpname, |
| 910 | &n, |
| 911 | force)); |
| 912 | free (tmpname); |
| 913 | } |
| 914 | if (found) |
| 915 | break; |
| 916 | |
| 917 | EOF |
| 918 | fi |
| 919 | cat >>e${EMULATION_NAME}.c <<EOF |
| 920 | len = strlen (l->name); |
| 921 | for (search = search_head; search != NULL; search = search->next) |
| 922 | { |
| 923 | char *filename; |
| 924 | |
| 925 | if (search->cmdline) |
| 926 | continue; |
| 927 | filename = (char *) xmalloc (strlen (search->name) + len + 2); |
| 928 | sprintf (filename, "%s/%s", search->name, l->name); |
| 929 | nn.name = filename; |
| 930 | if (gld${EMULATION_NAME}_try_needed (&nn, force)) |
| 931 | break; |
| 932 | free (filename); |
| 933 | } |
| 934 | if (search != NULL) |
| 935 | break; |
| 936 | EOF |
| 937 | if [ "x${USE_LIBPATH}" = xyes ] ; then |
| 938 | case ${target} in |
| 939 | *-*-linux-*) |
| 940 | cat >>e${EMULATION_NAME}.c <<EOF |
| 941 | if (gld${EMULATION_NAME}_check_ld_so_conf (l->name, force)) |
| 942 | break; |
| 943 | EOF |
| 944 | # Linux |
| 945 | ;; |
| 946 | esac |
| 947 | fi |
| 948 | cat >>e${EMULATION_NAME}.c <<EOF |
| 949 | } |
| 950 | |
| 951 | if (force < 2) |
| 952 | continue; |
| 953 | |
| 954 | einfo ("%P: warning: %s, needed by %B, not found (try using -rpath or -rpath-link)\n", |
| 955 | l->name, l->by); |
| 956 | } |
| 957 | } |
| 958 | |
| 959 | EOF |
| 960 | fi |
| 961 | |
| 962 | cat >>e${EMULATION_NAME}.c <<EOF |
| 963 | |
| 964 | /* Look through an expression for an assignment statement. */ |
| 965 | |
| 966 | static void |
| 967 | gld${EMULATION_NAME}_find_exp_assignment (etree_type *exp) |
| 968 | { |
| 969 | bfd_boolean provide = FALSE; |
| 970 | |
| 971 | switch (exp->type.node_class) |
| 972 | { |
| 973 | case etree_provide: |
| 974 | provide = TRUE; |
| 975 | /* Fall thru */ |
| 976 | case etree_assign: |
| 977 | /* We call record_link_assignment even if the symbol is defined. |
| 978 | This is because if it is defined by a dynamic object, we |
| 979 | actually want to use the value defined by the linker script, |
| 980 | not the value from the dynamic object (because we are setting |
| 981 | symbols like etext). If the symbol is defined by a regular |
| 982 | object, then, as it happens, calling record_link_assignment |
| 983 | will do no harm. */ |
| 984 | if (strcmp (exp->assign.dst, ".") != 0) |
| 985 | { |
| 986 | if (!bfd_elf_record_link_assignment (output_bfd, &link_info, |
| 987 | exp->assign.dst, provide)) |
| 988 | einfo ("%P%F: failed to record assignment to %s: %E\n", |
| 989 | exp->assign.dst); |
| 990 | } |
| 991 | gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src); |
| 992 | break; |
| 993 | |
| 994 | case etree_binary: |
| 995 | gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs); |
| 996 | gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs); |
| 997 | break; |
| 998 | |
| 999 | case etree_trinary: |
| 1000 | gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond); |
| 1001 | gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs); |
| 1002 | gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs); |
| 1003 | break; |
| 1004 | |
| 1005 | case etree_unary: |
| 1006 | gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child); |
| 1007 | break; |
| 1008 | |
| 1009 | default: |
| 1010 | break; |
| 1011 | } |
| 1012 | } |
| 1013 | |
| 1014 | |
| 1015 | /* This is called by the before_allocation routine via |
| 1016 | lang_for_each_statement. It locates any assignment statements, and |
| 1017 | tells the ELF backend about them, in case they are assignments to |
| 1018 | symbols which are referred to by dynamic objects. */ |
| 1019 | |
| 1020 | static void |
| 1021 | gld${EMULATION_NAME}_find_statement_assignment (lang_statement_union_type *s) |
| 1022 | { |
| 1023 | if (s->header.type == lang_assignment_statement_enum) |
| 1024 | gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp); |
| 1025 | } |
| 1026 | |
| 1027 | EOF |
| 1028 | |
| 1029 | if test x"$LDEMUL_BEFORE_ALLOCATION" != xgld"$EMULATION_NAME"_before_allocation; then |
| 1030 | if test x"${ELF_INTERPRETER_NAME+set}" = xset; then |
| 1031 | ELF_INTERPRETER_SET_DEFAULT=" |
| 1032 | if (sinterp != NULL) |
| 1033 | { |
| 1034 | sinterp->contents = (unsigned char *) ${ELF_INTERPRETER_NAME}; |
| 1035 | sinterp->size = strlen ((char *) sinterp->contents) + 1; |
| 1036 | } |
| 1037 | |
| 1038 | " |
| 1039 | else |
| 1040 | ELF_INTERPRETER_SET_DEFAULT= |
| 1041 | fi |
| 1042 | cat >>e${EMULATION_NAME}.c <<EOF |
| 1043 | |
| 1044 | /* This is called after the sections have been attached to output |
| 1045 | sections, but before any sizes or addresses have been set. */ |
| 1046 | |
| 1047 | static void |
| 1048 | gld${EMULATION_NAME}_before_allocation (void) |
| 1049 | { |
| 1050 | const char *rpath; |
| 1051 | asection *sinterp; |
| 1052 | |
| 1053 | if (link_info.hash->type == bfd_link_elf_hash_table) |
| 1054 | _bfd_elf_tls_setup (output_bfd, &link_info); |
| 1055 | |
| 1056 | /* If we are going to make any variable assignments, we need to let |
| 1057 | the ELF backend know about them in case the variables are |
| 1058 | referred to by dynamic objects. */ |
| 1059 | lang_for_each_statement (gld${EMULATION_NAME}_find_statement_assignment); |
| 1060 | |
| 1061 | /* Let the ELF backend work out the sizes of any sections required |
| 1062 | by dynamic linking. */ |
| 1063 | rpath = command_line.rpath; |
| 1064 | if (rpath == NULL) |
| 1065 | rpath = (const char *) getenv ("LD_RUN_PATH"); |
| 1066 | if (! (bfd_elf_size_dynamic_sections |
| 1067 | (output_bfd, command_line.soname, rpath, |
| 1068 | command_line.filter_shlib, |
| 1069 | (const char * const *) command_line.auxiliary_filters, |
| 1070 | &link_info, &sinterp, lang_elf_version_info))) |
| 1071 | einfo ("%P%F: failed to set dynamic section sizes: %E\n"); |
| 1072 | |
| 1073 | ${ELF_INTERPRETER_SET_DEFAULT} |
| 1074 | /* Let the user override the dynamic linker we are using. */ |
| 1075 | if (command_line.interpreter != NULL |
| 1076 | && sinterp != NULL) |
| 1077 | { |
| 1078 | sinterp->contents = (bfd_byte *) command_line.interpreter; |
| 1079 | sinterp->size = strlen (command_line.interpreter) + 1; |
| 1080 | } |
| 1081 | |
| 1082 | /* Look for any sections named .gnu.warning. As a GNU extensions, |
| 1083 | we treat such sections as containing warning messages. We print |
| 1084 | out the warning message, and then zero out the section size so |
| 1085 | that it does not get copied into the output file. */ |
| 1086 | |
| 1087 | { |
| 1088 | LANG_FOR_EACH_INPUT_STATEMENT (is) |
| 1089 | { |
| 1090 | asection *s; |
| 1091 | bfd_size_type sz; |
| 1092 | bfd_size_type prefix_len; |
| 1093 | char *msg; |
| 1094 | bfd_boolean ret; |
| 1095 | const char * gnu_warning_prefix = _("warning: "); |
| 1096 | |
| 1097 | if (is->just_syms_flag) |
| 1098 | continue; |
| 1099 | |
| 1100 | s = bfd_get_section_by_name (is->the_bfd, ".gnu.warning"); |
| 1101 | if (s == NULL) |
| 1102 | continue; |
| 1103 | |
| 1104 | sz = s->size; |
| 1105 | prefix_len = strlen (gnu_warning_prefix); |
| 1106 | msg = xmalloc ((size_t) (prefix_len + sz + 1)); |
| 1107 | strcpy (msg, gnu_warning_prefix); |
| 1108 | if (! bfd_get_section_contents (is->the_bfd, s, msg + prefix_len, |
| 1109 | (file_ptr) 0, sz)) |
| 1110 | einfo ("%F%B: Can't read contents of section .gnu.warning: %E\n", |
| 1111 | is->the_bfd); |
| 1112 | msg[prefix_len + sz] = '\0'; |
| 1113 | ret = link_info.callbacks->warning (&link_info, msg, |
| 1114 | (const char *) NULL, |
| 1115 | is->the_bfd, (asection *) NULL, |
| 1116 | (bfd_vma) 0); |
| 1117 | ASSERT (ret); |
| 1118 | free (msg); |
| 1119 | |
| 1120 | /* Clobber the section size, so that we don't waste copying the |
| 1121 | warning into the output file. */ |
| 1122 | s->size = 0; |
| 1123 | |
| 1124 | /* Also set SEC_EXCLUDE, so that symbols defined in the warning |
| 1125 | section don't get copied to the output. */ |
| 1126 | s->flags |= SEC_EXCLUDE; |
| 1127 | } |
| 1128 | } |
| 1129 | |
| 1130 | if (!link_info.relocatable) |
| 1131 | strip_excluded_output_sections (); |
| 1132 | |
| 1133 | if (!bfd_elf_size_dynsym_hash_dynstr (output_bfd, &link_info)) |
| 1134 | einfo ("%P%F: failed to set dynamic section sizes: %E\n"); |
| 1135 | } |
| 1136 | |
| 1137 | EOF |
| 1138 | fi |
| 1139 | |
| 1140 | if test x"$LDEMUL_OPEN_DYNAMIC_ARCHIVE" != xgld"$EMULATION_NAME"_open_dynamic_archive; then |
| 1141 | cat >>e${EMULATION_NAME}.c <<EOF |
| 1142 | |
| 1143 | /* Try to open a dynamic archive. This is where we know that ELF |
| 1144 | dynamic libraries have an extension of .so (or .sl on oddball systems |
| 1145 | like hpux). */ |
| 1146 | |
| 1147 | static bfd_boolean |
| 1148 | gld${EMULATION_NAME}_open_dynamic_archive |
| 1149 | (const char *arch, search_dirs_type *search, lang_input_statement_type *entry) |
| 1150 | { |
| 1151 | const char *filename; |
| 1152 | char *string; |
| 1153 | |
| 1154 | if (! entry->is_archive) |
| 1155 | return FALSE; |
| 1156 | |
| 1157 | filename = entry->filename; |
| 1158 | |
| 1159 | /* This allocates a few bytes too many when EXTRA_SHLIB_EXTENSION |
| 1160 | is defined, but it does not seem worth the headache to optimize |
| 1161 | away those two bytes of space. */ |
| 1162 | string = (char *) xmalloc (strlen (search->name) |
| 1163 | + strlen (filename) |
| 1164 | + strlen (arch) |
| 1165 | #ifdef EXTRA_SHLIB_EXTENSION |
| 1166 | + strlen (EXTRA_SHLIB_EXTENSION) |
| 1167 | #endif |
| 1168 | + sizeof "/lib.so"); |
| 1169 | |
| 1170 | sprintf (string, "%s/lib%s%s.so", search->name, filename, arch); |
| 1171 | |
| 1172 | #ifdef EXTRA_SHLIB_EXTENSION |
| 1173 | /* Try the .so extension first. If that fails build a new filename |
| 1174 | using EXTRA_SHLIB_EXTENSION. */ |
| 1175 | if (! ldfile_try_open_bfd (string, entry)) |
| 1176 | sprintf (string, "%s/lib%s%s%s", search->name, |
| 1177 | filename, arch, EXTRA_SHLIB_EXTENSION); |
| 1178 | #endif |
| 1179 | |
| 1180 | if (! ldfile_try_open_bfd (string, entry)) |
| 1181 | { |
| 1182 | free (string); |
| 1183 | return FALSE; |
| 1184 | } |
| 1185 | |
| 1186 | entry->filename = string; |
| 1187 | |
| 1188 | /* We have found a dynamic object to include in the link. The ELF |
| 1189 | backend linker will create a DT_NEEDED entry in the .dynamic |
| 1190 | section naming this file. If this file includes a DT_SONAME |
| 1191 | entry, it will be used. Otherwise, the ELF linker will just use |
| 1192 | the name of the file. For an archive found by searching, like |
| 1193 | this one, the DT_NEEDED entry should consist of just the name of |
| 1194 | the file, without the path information used to find it. Note |
| 1195 | that we only need to do this if we have a dynamic object; an |
| 1196 | archive will never be referenced by a DT_NEEDED entry. |
| 1197 | |
| 1198 | FIXME: This approach--using bfd_elf_set_dt_needed_name--is not |
| 1199 | very pretty. I haven't been able to think of anything that is |
| 1200 | pretty, though. */ |
| 1201 | if (bfd_check_format (entry->the_bfd, bfd_object) |
| 1202 | && (entry->the_bfd->flags & DYNAMIC) != 0) |
| 1203 | { |
| 1204 | ASSERT (entry->is_archive && entry->search_dirs_flag); |
| 1205 | |
| 1206 | /* Rather than duplicating the logic above. Just use the |
| 1207 | filename we recorded earlier. */ |
| 1208 | |
| 1209 | filename = lbasename (entry->filename); |
| 1210 | bfd_elf_set_dt_needed_name (entry->the_bfd, filename); |
| 1211 | } |
| 1212 | |
| 1213 | return TRUE; |
| 1214 | } |
| 1215 | |
| 1216 | EOF |
| 1217 | fi |
| 1218 | |
| 1219 | if test x"$LDEMUL_PLACE_ORPHAN" != xgld"$EMULATION_NAME"_place_orphan; then |
| 1220 | cat >>e${EMULATION_NAME}.c <<EOF |
| 1221 | |
| 1222 | /* A variant of lang_output_section_find used by place_orphan. */ |
| 1223 | |
| 1224 | static lang_output_section_statement_type * |
| 1225 | output_rel_find (asection *sec, int isdyn) |
| 1226 | { |
| 1227 | lang_output_section_statement_type *lookup; |
| 1228 | lang_output_section_statement_type *last = NULL; |
| 1229 | lang_output_section_statement_type *last_alloc = NULL; |
| 1230 | lang_output_section_statement_type *last_rel = NULL; |
| 1231 | lang_output_section_statement_type *last_rel_alloc = NULL; |
| 1232 | int rela = sec->name[4] == 'a'; |
| 1233 | |
| 1234 | for (lookup = &lang_output_section_statement.head->output_section_statement; |
| 1235 | lookup != NULL; |
| 1236 | lookup = lookup->next) |
| 1237 | { |
| 1238 | if (lookup->constraint != -1 |
| 1239 | && strncmp (".rel", lookup->name, 4) == 0) |
| 1240 | { |
| 1241 | int lookrela = lookup->name[4] == 'a'; |
| 1242 | |
| 1243 | /* .rel.dyn must come before all other reloc sections, to suit |
| 1244 | GNU ld.so. */ |
| 1245 | if (isdyn) |
| 1246 | break; |
| 1247 | |
| 1248 | /* Don't place after .rel.plt as doing so results in wrong |
| 1249 | dynamic tags. */ |
| 1250 | if (strcmp (".plt", lookup->name + 4 + lookrela) == 0) |
| 1251 | break; |
| 1252 | |
| 1253 | if (rela == lookrela || last_rel == NULL) |
| 1254 | last_rel = lookup; |
| 1255 | if ((rela == lookrela || last_rel_alloc == NULL) |
| 1256 | && lookup->bfd_section != NULL |
| 1257 | && (lookup->bfd_section->flags & SEC_ALLOC) != 0) |
| 1258 | last_rel_alloc = lookup; |
| 1259 | } |
| 1260 | |
| 1261 | last = lookup; |
| 1262 | if (lookup->bfd_section != NULL |
| 1263 | && (lookup->bfd_section->flags & SEC_ALLOC) != 0) |
| 1264 | last_alloc = lookup; |
| 1265 | } |
| 1266 | |
| 1267 | if (last_rel_alloc) |
| 1268 | return last_rel_alloc; |
| 1269 | |
| 1270 | if (last_rel) |
| 1271 | return last_rel; |
| 1272 | |
| 1273 | if (last_alloc) |
| 1274 | return last_alloc; |
| 1275 | |
| 1276 | return last; |
| 1277 | } |
| 1278 | |
| 1279 | /* Place an orphan section. We use this to put random SHF_ALLOC |
| 1280 | sections in the right segment. */ |
| 1281 | |
| 1282 | static bfd_boolean |
| 1283 | gld${EMULATION_NAME}_place_orphan (lang_input_statement_type *file, asection *s) |
| 1284 | { |
| 1285 | static struct orphan_save hold[] = |
| 1286 | { |
| 1287 | { ".text", |
| 1288 | SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE, |
| 1289 | 0, 0, 0, 0 }, |
| 1290 | { ".rodata", |
| 1291 | SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA, |
| 1292 | 0, 0, 0, 0 }, |
| 1293 | { ".data", |
| 1294 | SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA, |
| 1295 | 0, 0, 0, 0 }, |
| 1296 | { ".bss", |
| 1297 | SEC_ALLOC, |
| 1298 | 0, 0, 0, 0 }, |
| 1299 | { 0, |
| 1300 | SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA, |
| 1301 | 0, 0, 0, 0 }, |
| 1302 | { ".interp", |
| 1303 | SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA, |
| 1304 | 0, 0, 0, 0 }, |
| 1305 | { ".sdata", |
| 1306 | SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_SMALL_DATA, |
| 1307 | 0, 0, 0, 0 } |
| 1308 | }; |
| 1309 | enum orphan_save_index |
| 1310 | { |
| 1311 | orphan_text = 0, |
| 1312 | orphan_rodata, |
| 1313 | orphan_data, |
| 1314 | orphan_bss, |
| 1315 | orphan_rel, |
| 1316 | orphan_interp, |
| 1317 | orphan_sdata |
| 1318 | }; |
| 1319 | static int orphan_init_done = 0; |
| 1320 | struct orphan_save *place; |
| 1321 | const char *secname; |
| 1322 | lang_output_section_statement_type *after; |
| 1323 | lang_output_section_statement_type *os; |
| 1324 | int isdyn = 0; |
| 1325 | |
| 1326 | secname = bfd_get_section_name (s->owner, s); |
| 1327 | |
| 1328 | if (! link_info.relocatable |
| 1329 | && link_info.combreloc |
| 1330 | && (s->flags & SEC_ALLOC) |
| 1331 | && strncmp (secname, ".rel", 4) == 0) |
| 1332 | { |
| 1333 | if (secname[4] == 'a') |
| 1334 | secname = ".rela.dyn"; |
| 1335 | else |
| 1336 | secname = ".rel.dyn"; |
| 1337 | isdyn = 1; |
| 1338 | } |
| 1339 | |
| 1340 | if (isdyn || (!config.unique_orphan_sections && !unique_section_p (s))) |
| 1341 | { |
| 1342 | /* Look through the script to see where to place this section. */ |
| 1343 | os = lang_output_section_find (secname); |
| 1344 | |
| 1345 | if (os != NULL |
| 1346 | && (os->bfd_section == NULL |
| 1347 | || os->bfd_section->flags == 0 |
| 1348 | || ((s->flags ^ os->bfd_section->flags) |
| 1349 | & (SEC_LOAD | SEC_ALLOC)) == 0)) |
| 1350 | { |
| 1351 | /* We already have an output section statement with this |
| 1352 | name, and its bfd section, if any, has compatible flags. |
| 1353 | If the section already exists but does not have any flags |
| 1354 | set, then it has been created by the linker, probably as a |
| 1355 | result of a --section-start command line switch. */ |
| 1356 | lang_add_section (&os->children, s, os, file); |
| 1357 | return TRUE; |
| 1358 | } |
| 1359 | } |
| 1360 | |
| 1361 | if (!orphan_init_done) |
| 1362 | { |
| 1363 | struct orphan_save *ho; |
| 1364 | for (ho = hold; ho < hold + sizeof (hold) / sizeof (hold[0]); ++ho) |
| 1365 | if (ho->name != NULL) |
| 1366 | { |
| 1367 | ho->os = lang_output_section_find (ho->name); |
| 1368 | if (ho->os != NULL && ho->os->flags == 0) |
| 1369 | ho->os->flags = ho->flags; |
| 1370 | } |
| 1371 | orphan_init_done = 1; |
| 1372 | } |
| 1373 | |
| 1374 | /* If this is a final link, then always put .gnu.warning.SYMBOL |
| 1375 | sections into the .text section to get them out of the way. */ |
| 1376 | if (link_info.executable |
| 1377 | && ! link_info.relocatable |
| 1378 | && strncmp (secname, ".gnu.warning.", sizeof ".gnu.warning." - 1) == 0 |
| 1379 | && hold[orphan_text].os != NULL) |
| 1380 | { |
| 1381 | lang_add_section (&hold[orphan_text].os->children, s, |
| 1382 | hold[orphan_text].os, file); |
| 1383 | return TRUE; |
| 1384 | } |
| 1385 | |
| 1386 | /* Decide which segment the section should go in based on the |
| 1387 | section name and section flags. We put loadable .note sections |
| 1388 | right after the .interp section, so that the PT_NOTE segment is |
| 1389 | stored right after the program headers where the OS can read it |
| 1390 | in the first page. */ |
| 1391 | |
| 1392 | place = NULL; |
| 1393 | if ((s->flags & SEC_ALLOC) == 0) |
| 1394 | ; |
| 1395 | else if ((s->flags & SEC_LOAD) != 0 |
| 1396 | && strncmp (secname, ".note", 5) == 0) |
| 1397 | place = &hold[orphan_interp]; |
| 1398 | else if ((s->flags & (SEC_LOAD | SEC_HAS_CONTENTS)) == 0) |
| 1399 | place = &hold[orphan_bss]; |
| 1400 | else if ((s->flags & SEC_SMALL_DATA) != 0) |
| 1401 | place = &hold[orphan_sdata]; |
| 1402 | else if ((s->flags & SEC_READONLY) == 0) |
| 1403 | place = &hold[orphan_data]; |
| 1404 | else if (strncmp (secname, ".rel", 4) == 0 |
| 1405 | && (s->flags & SEC_LOAD) != 0) |
| 1406 | place = &hold[orphan_rel]; |
| 1407 | else if ((s->flags & SEC_CODE) == 0) |
| 1408 | place = &hold[orphan_rodata]; |
| 1409 | else |
| 1410 | place = &hold[orphan_text]; |
| 1411 | |
| 1412 | after = NULL; |
| 1413 | if (place != NULL) |
| 1414 | { |
| 1415 | if (place->os == NULL) |
| 1416 | { |
| 1417 | if (place->name != NULL) |
| 1418 | place->os = lang_output_section_find (place->name); |
| 1419 | else |
| 1420 | place->os = output_rel_find (s, isdyn); |
| 1421 | } |
| 1422 | after = place->os; |
| 1423 | if (after == NULL) |
| 1424 | after = lang_output_section_find_by_flags (s, &place->os); |
| 1425 | if (after == NULL) |
| 1426 | /* *ABS* is always the first output section statement. */ |
| 1427 | after = &lang_output_section_statement.head->output_section_statement; |
| 1428 | } |
| 1429 | |
| 1430 | /* Choose a unique name for the section. This will be needed if the |
| 1431 | same section name appears in the input file with different |
| 1432 | loadable or allocatable characteristics. */ |
| 1433 | if (bfd_get_section_by_name (output_bfd, secname) != NULL) |
| 1434 | { |
| 1435 | static int count = 1; |
| 1436 | secname = bfd_get_unique_section_name (output_bfd, secname, &count); |
| 1437 | if (secname == NULL) |
| 1438 | einfo ("%F%P: place_orphan failed: %E\n"); |
| 1439 | } |
| 1440 | |
| 1441 | lang_insert_orphan (file, s, secname, after, place, NULL, NULL); |
| 1442 | |
| 1443 | return TRUE; |
| 1444 | } |
| 1445 | EOF |
| 1446 | fi |
| 1447 | |
| 1448 | if test x"$LDEMUL_FINISH" != xgld"$EMULATION_NAME"_finish; then |
| 1449 | cat >>e${EMULATION_NAME}.c <<EOF |
| 1450 | |
| 1451 | static void |
| 1452 | gld${EMULATION_NAME}_provide_bound_symbols (const char *sec, |
| 1453 | const char *start, |
| 1454 | const char *end) |
| 1455 | { |
| 1456 | asection *s = bfd_get_section_by_name (output_bfd, sec); |
| 1457 | if (s && bfd_section_removed_from_list (output_bfd, s)) |
| 1458 | s = NULL; |
| 1459 | _bfd_elf_provide_section_bound_symbols (&link_info, s, start, end); |
| 1460 | } |
| 1461 | |
| 1462 | /* If not building a shared library, provide |
| 1463 | |
| 1464 | __preinit_array_start |
| 1465 | __preinit_array_end |
| 1466 | __init_array_start |
| 1467 | __init_array_end |
| 1468 | __fini_array_start |
| 1469 | __fini_array_end |
| 1470 | |
| 1471 | They are set here rather than via PROVIDE in the linker |
| 1472 | script, because using PROVIDE inside an output section |
| 1473 | statement results in unnecessary output sections. Using |
| 1474 | PROVIDE outside an output section statement runs the risk of |
| 1475 | section alignment affecting where the section starts. */ |
| 1476 | |
| 1477 | static void |
| 1478 | gld${EMULATION_NAME}_provide_init_fini_syms (void) |
| 1479 | { |
| 1480 | if (!link_info.relocatable && link_info.executable) |
| 1481 | { |
| 1482 | gld${EMULATION_NAME}_provide_bound_symbols (".preinit_array", |
| 1483 | "__preinit_array_start", |
| 1484 | "__preinit_array_end"); |
| 1485 | gld${EMULATION_NAME}_provide_bound_symbols (".init_array", |
| 1486 | "__init_array_start", |
| 1487 | "__init_array_end"); |
| 1488 | gld${EMULATION_NAME}_provide_bound_symbols (".fini_array", |
| 1489 | "__fini_array_start", |
| 1490 | "__fini_array_end"); |
| 1491 | } |
| 1492 | } |
| 1493 | |
| 1494 | static void |
| 1495 | gld${EMULATION_NAME}_layout_sections_again (void) |
| 1496 | { |
| 1497 | lang_reset_memory_regions (); |
| 1498 | |
| 1499 | /* Resize the sections. */ |
| 1500 | lang_size_sections (NULL, TRUE); |
| 1501 | |
| 1502 | /* Redo special stuff. */ |
| 1503 | ldemul_after_allocation (); |
| 1504 | |
| 1505 | /* Do the assignments again. */ |
| 1506 | lang_do_assignments (); |
| 1507 | } |
| 1508 | |
| 1509 | static void |
| 1510 | gld${EMULATION_NAME}_strip_empty_sections (void) |
| 1511 | { |
| 1512 | if (!link_info.relocatable) |
| 1513 | { |
| 1514 | lang_output_section_statement_type *os; |
| 1515 | |
| 1516 | for (os = &lang_output_section_statement.head->output_section_statement; |
| 1517 | os != NULL; |
| 1518 | os = os->next) |
| 1519 | { |
| 1520 | asection *s; |
| 1521 | |
| 1522 | if (os == abs_output_section || os->constraint == -1) |
| 1523 | continue; |
| 1524 | s = os->bfd_section; |
| 1525 | if (s != NULL |
| 1526 | && s->size == 0 |
| 1527 | && (s->flags & SEC_KEEP) == 0 |
| 1528 | && !bfd_section_removed_from_list (output_bfd, s)) |
| 1529 | { |
| 1530 | bfd_section_list_remove (output_bfd, s); |
| 1531 | output_bfd->section_count--; |
| 1532 | } |
| 1533 | } |
| 1534 | } |
| 1535 | } |
| 1536 | |
| 1537 | static void |
| 1538 | gld${EMULATION_NAME}_finish (void) |
| 1539 | { |
| 1540 | if (bfd_elf_discard_info (output_bfd, &link_info)) |
| 1541 | gld${EMULATION_NAME}_layout_sections_again (); |
| 1542 | |
| 1543 | gld${EMULATION_NAME}_strip_empty_sections (); |
| 1544 | gld${EMULATION_NAME}_provide_init_fini_syms (); |
| 1545 | } |
| 1546 | EOF |
| 1547 | fi |
| 1548 | |
| 1549 | if test x"$LDEMUL_GET_SCRIPT" != xgld"$EMULATION_NAME"_get_script; then |
| 1550 | cat >>e${EMULATION_NAME}.c <<EOF |
| 1551 | |
| 1552 | static char * |
| 1553 | gld${EMULATION_NAME}_get_script (int *isfile) |
| 1554 | EOF |
| 1555 | |
| 1556 | if test -n "$COMPILE_IN" |
| 1557 | then |
| 1558 | # Scripts compiled in. |
| 1559 | |
| 1560 | # sed commands to quote an ld script as a C string. |
| 1561 | sc="-f stringify.sed" |
| 1562 | |
| 1563 | cat >>e${EMULATION_NAME}.c <<EOF |
| 1564 | { |
| 1565 | *isfile = 0; |
| 1566 | |
| 1567 | if (link_info.relocatable && config.build_constructors) |
| 1568 | return |
| 1569 | EOF |
| 1570 | sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c |
| 1571 | echo ' ; else if (link_info.relocatable) return' >> e${EMULATION_NAME}.c |
| 1572 | sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c |
| 1573 | echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c |
| 1574 | sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c |
| 1575 | if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then : ; else |
| 1576 | echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c |
| 1577 | sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c |
| 1578 | fi |
| 1579 | if test -n "$GENERATE_PIE_SCRIPT" ; then |
| 1580 | if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then |
| 1581 | echo ' ; else if (link_info.pie && link_info.combreloc' >> e${EMULATION_NAME}.c |
| 1582 | echo ' && link_info.relro' >> e${EMULATION_NAME}.c |
| 1583 | echo ' && (link_info.flags & DT_BIND_NOW)) return' >> e${EMULATION_NAME}.c |
| 1584 | sed $sc ldscripts/${EMULATION_NAME}.xdw >> e${EMULATION_NAME}.c |
| 1585 | echo ' ; else if (link_info.pie && link_info.combreloc) return' >> e${EMULATION_NAME}.c |
| 1586 | sed $sc ldscripts/${EMULATION_NAME}.xdc >> e${EMULATION_NAME}.c |
| 1587 | fi |
| 1588 | echo ' ; else if (link_info.pie) return' >> e${EMULATION_NAME}.c |
| 1589 | sed $sc ldscripts/${EMULATION_NAME}.xd >> e${EMULATION_NAME}.c |
| 1590 | fi |
| 1591 | if test -n "$GENERATE_SHLIB_SCRIPT" ; then |
| 1592 | if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then |
| 1593 | echo ' ; else if (link_info.shared && link_info.combreloc' >> e${EMULATION_NAME}.c |
| 1594 | echo ' && link_info.relro' >> e${EMULATION_NAME}.c |
| 1595 | echo ' && (link_info.flags & DT_BIND_NOW)) return' >> e${EMULATION_NAME}.c |
| 1596 | sed $sc ldscripts/${EMULATION_NAME}.xsw >> e${EMULATION_NAME}.c |
| 1597 | echo ' ; else if (link_info.shared && link_info.combreloc) return' >> e${EMULATION_NAME}.c |
| 1598 | sed $sc ldscripts/${EMULATION_NAME}.xsc >> e${EMULATION_NAME}.c |
| 1599 | fi |
| 1600 | echo ' ; else if (link_info.shared) return' >> e${EMULATION_NAME}.c |
| 1601 | sed $sc ldscripts/${EMULATION_NAME}.xs >> e${EMULATION_NAME}.c |
| 1602 | fi |
| 1603 | if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then |
| 1604 | echo ' ; else if (link_info.combreloc && link_info.relro' >> e${EMULATION_NAME}.c |
| 1605 | echo ' && (link_info.flags & DT_BIND_NOW)) return' >> e${EMULATION_NAME}.c |
| 1606 | sed $sc ldscripts/${EMULATION_NAME}.xw >> e${EMULATION_NAME}.c |
| 1607 | echo ' ; else if (link_info.combreloc) return' >> e${EMULATION_NAME}.c |
| 1608 | sed $sc ldscripts/${EMULATION_NAME}.xc >> e${EMULATION_NAME}.c |
| 1609 | fi |
| 1610 | echo ' ; else return' >> e${EMULATION_NAME}.c |
| 1611 | sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c |
| 1612 | echo '; }' >> e${EMULATION_NAME}.c |
| 1613 | |
| 1614 | else |
| 1615 | # Scripts read from the filesystem. |
| 1616 | |
| 1617 | cat >>e${EMULATION_NAME}.c <<EOF |
| 1618 | { |
| 1619 | *isfile = 1; |
| 1620 | |
| 1621 | if (link_info.relocatable && config.build_constructors) |
| 1622 | return "ldscripts/${EMULATION_NAME}.xu"; |
| 1623 | else if (link_info.relocatable) |
| 1624 | return "ldscripts/${EMULATION_NAME}.xr"; |
| 1625 | else if (!config.text_read_only) |
| 1626 | return "ldscripts/${EMULATION_NAME}.xbn"; |
| 1627 | EOF |
| 1628 | if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then : |
| 1629 | else |
| 1630 | cat >>e${EMULATION_NAME}.c <<EOF |
| 1631 | else if (!config.magic_demand_paged) |
| 1632 | return "ldscripts/${EMULATION_NAME}.xn"; |
| 1633 | EOF |
| 1634 | fi |
| 1635 | if test -n "$GENERATE_PIE_SCRIPT" ; then |
| 1636 | if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then |
| 1637 | cat >>e${EMULATION_NAME}.c <<EOF |
| 1638 | else if (link_info.pie && link_info.combreloc |
| 1639 | && link_info.relro && (link_info.flags & DT_BIND_NOW)) |
| 1640 | return "ldscripts/${EMULATION_NAME}.xdw"; |
| 1641 | else if (link_info.pie && link_info.combreloc) |
| 1642 | return "ldscripts/${EMULATION_NAME}.xdc"; |
| 1643 | EOF |
| 1644 | fi |
| 1645 | cat >>e${EMULATION_NAME}.c <<EOF |
| 1646 | else if (link_info.pie) |
| 1647 | return "ldscripts/${EMULATION_NAME}.xd"; |
| 1648 | EOF |
| 1649 | fi |
| 1650 | if test -n "$GENERATE_SHLIB_SCRIPT" ; then |
| 1651 | if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then |
| 1652 | cat >>e${EMULATION_NAME}.c <<EOF |
| 1653 | else if (link_info.shared && link_info.combreloc |
| 1654 | && link_info.relro && (link_info.flags & DT_BIND_NOW)) |
| 1655 | return "ldscripts/${EMULATION_NAME}.xsw"; |
| 1656 | else if (link_info.shared && link_info.combreloc) |
| 1657 | return "ldscripts/${EMULATION_NAME}.xsc"; |
| 1658 | EOF |
| 1659 | fi |
| 1660 | cat >>e${EMULATION_NAME}.c <<EOF |
| 1661 | else if (link_info.shared) |
| 1662 | return "ldscripts/${EMULATION_NAME}.xs"; |
| 1663 | EOF |
| 1664 | fi |
| 1665 | if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then |
| 1666 | cat >>e${EMULATION_NAME}.c <<EOF |
| 1667 | else if (link_info.combreloc && link_info.relro |
| 1668 | && (link_info.flags & DT_BIND_NOW)) |
| 1669 | return "ldscripts/${EMULATION_NAME}.xw"; |
| 1670 | else if (link_info.combreloc) |
| 1671 | return "ldscripts/${EMULATION_NAME}.xc"; |
| 1672 | EOF |
| 1673 | fi |
| 1674 | cat >>e${EMULATION_NAME}.c <<EOF |
| 1675 | else |
| 1676 | return "ldscripts/${EMULATION_NAME}.x"; |
| 1677 | } |
| 1678 | |
| 1679 | EOF |
| 1680 | fi |
| 1681 | fi |
| 1682 | |
| 1683 | if test -n "$PARSE_AND_LIST_ARGS_CASES" -o x"$GENERATE_SHLIB_SCRIPT" = xyes; then |
| 1684 | |
| 1685 | if test -n "$PARSE_AND_LIST_PROLOGUE" ; then |
| 1686 | cat >>e${EMULATION_NAME}.c <<EOF |
| 1687 | $PARSE_AND_LIST_PROLOGUE |
| 1688 | EOF |
| 1689 | fi |
| 1690 | |
| 1691 | cat >>e${EMULATION_NAME}.c <<EOF |
| 1692 | |
| 1693 | #define OPTION_DISABLE_NEW_DTAGS (400) |
| 1694 | #define OPTION_ENABLE_NEW_DTAGS (OPTION_DISABLE_NEW_DTAGS + 1) |
| 1695 | #define OPTION_GROUP (OPTION_ENABLE_NEW_DTAGS + 1) |
| 1696 | #define OPTION_EH_FRAME_HDR (OPTION_GROUP + 1) |
| 1697 | #define OPTION_EXCLUDE_LIBS (OPTION_EH_FRAME_HDR + 1) |
| 1698 | |
| 1699 | static void |
| 1700 | gld${EMULATION_NAME}_add_options |
| 1701 | (int ns, char **shortopts, int nl, struct option **longopts, |
| 1702 | int nrl ATTRIBUTE_UNUSED, struct option **really_longopts ATTRIBUTE_UNUSED) |
| 1703 | { |
| 1704 | static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:"; |
| 1705 | static const struct option xtra_long[] = { |
| 1706 | EOF |
| 1707 | |
| 1708 | if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then |
| 1709 | cat >>e${EMULATION_NAME}.c <<EOF |
| 1710 | {"disable-new-dtags", no_argument, NULL, OPTION_DISABLE_NEW_DTAGS}, |
| 1711 | {"enable-new-dtags", no_argument, NULL, OPTION_ENABLE_NEW_DTAGS}, |
| 1712 | {"eh-frame-hdr", no_argument, NULL, OPTION_EH_FRAME_HDR}, |
| 1713 | {"exclude-libs", required_argument, NULL, OPTION_EXCLUDE_LIBS}, |
| 1714 | {"Bgroup", no_argument, NULL, OPTION_GROUP}, |
| 1715 | EOF |
| 1716 | fi |
| 1717 | |
| 1718 | if test -n "$PARSE_AND_LIST_LONGOPTS" ; then |
| 1719 | cat >>e${EMULATION_NAME}.c <<EOF |
| 1720 | $PARSE_AND_LIST_LONGOPTS |
| 1721 | EOF |
| 1722 | fi |
| 1723 | |
| 1724 | cat >>e${EMULATION_NAME}.c <<EOF |
| 1725 | {NULL, no_argument, NULL, 0} |
| 1726 | }; |
| 1727 | |
| 1728 | *shortopts = (char *) xrealloc (*shortopts, ns + sizeof (xtra_short)); |
| 1729 | memcpy (*shortopts + ns, &xtra_short, sizeof (xtra_short)); |
| 1730 | *longopts = (struct option *) |
| 1731 | xrealloc (*longopts, nl * sizeof (struct option) + sizeof (xtra_long)); |
| 1732 | memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long)); |
| 1733 | } |
| 1734 | |
| 1735 | static bfd_boolean |
| 1736 | gld${EMULATION_NAME}_handle_option (int optc) |
| 1737 | { |
| 1738 | switch (optc) |
| 1739 | { |
| 1740 | default: |
| 1741 | return FALSE; |
| 1742 | |
| 1743 | EOF |
| 1744 | |
| 1745 | if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then |
| 1746 | cat >>e${EMULATION_NAME}.c <<EOF |
| 1747 | case OPTION_DISABLE_NEW_DTAGS: |
| 1748 | link_info.new_dtags = FALSE; |
| 1749 | break; |
| 1750 | |
| 1751 | case OPTION_ENABLE_NEW_DTAGS: |
| 1752 | link_info.new_dtags = TRUE; |
| 1753 | break; |
| 1754 | |
| 1755 | case OPTION_EH_FRAME_HDR: |
| 1756 | link_info.eh_frame_hdr = TRUE; |
| 1757 | break; |
| 1758 | |
| 1759 | case OPTION_GROUP: |
| 1760 | link_info.flags_1 |= (bfd_vma) DF_1_GROUP; |
| 1761 | /* Groups must be self-contained. */ |
| 1762 | link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR; |
| 1763 | link_info.unresolved_syms_in_shared_libs = RM_GENERATE_ERROR; |
| 1764 | break; |
| 1765 | |
| 1766 | case OPTION_EXCLUDE_LIBS: |
| 1767 | add_excluded_libs (optarg); |
| 1768 | break; |
| 1769 | |
| 1770 | case 'z': |
| 1771 | if (strcmp (optarg, "initfirst") == 0) |
| 1772 | link_info.flags_1 |= (bfd_vma) DF_1_INITFIRST; |
| 1773 | else if (strcmp (optarg, "interpose") == 0) |
| 1774 | link_info.flags_1 |= (bfd_vma) DF_1_INTERPOSE; |
| 1775 | else if (strcmp (optarg, "loadfltr") == 0) |
| 1776 | link_info.flags_1 |= (bfd_vma) DF_1_LOADFLTR; |
| 1777 | else if (strcmp (optarg, "nodefaultlib") == 0) |
| 1778 | link_info.flags_1 |= (bfd_vma) DF_1_NODEFLIB; |
| 1779 | else if (strcmp (optarg, "nodelete") == 0) |
| 1780 | link_info.flags_1 |= (bfd_vma) DF_1_NODELETE; |
| 1781 | else if (strcmp (optarg, "nodlopen") == 0) |
| 1782 | link_info.flags_1 |= (bfd_vma) DF_1_NOOPEN; |
| 1783 | else if (strcmp (optarg, "nodump") == 0) |
| 1784 | link_info.flags_1 |= (bfd_vma) DF_1_NODUMP; |
| 1785 | else if (strcmp (optarg, "now") == 0) |
| 1786 | { |
| 1787 | link_info.flags |= (bfd_vma) DF_BIND_NOW; |
| 1788 | link_info.flags_1 |= (bfd_vma) DF_1_NOW; |
| 1789 | } |
| 1790 | else if (strcmp (optarg, "origin") == 0) |
| 1791 | { |
| 1792 | link_info.flags |= (bfd_vma) DF_ORIGIN; |
| 1793 | link_info.flags_1 |= (bfd_vma) DF_1_ORIGIN; |
| 1794 | } |
| 1795 | else if (strcmp (optarg, "defs") == 0) |
| 1796 | link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR; |
| 1797 | else if (strcmp (optarg, "muldefs") == 0) |
| 1798 | link_info.allow_multiple_definition = TRUE; |
| 1799 | else if (strcmp (optarg, "combreloc") == 0) |
| 1800 | link_info.combreloc = TRUE; |
| 1801 | else if (strcmp (optarg, "nocombreloc") == 0) |
| 1802 | link_info.combreloc = FALSE; |
| 1803 | else if (strcmp (optarg, "nocopyreloc") == 0) |
| 1804 | link_info.nocopyreloc = TRUE; |
| 1805 | else if (strcmp (optarg, "execstack") == 0) |
| 1806 | { |
| 1807 | link_info.execstack = TRUE; |
| 1808 | link_info.noexecstack = FALSE; |
| 1809 | } |
| 1810 | else if (strcmp (optarg, "noexecstack") == 0) |
| 1811 | { |
| 1812 | link_info.noexecstack = TRUE; |
| 1813 | link_info.execstack = FALSE; |
| 1814 | } |
| 1815 | else if (strcmp (optarg, "relro") == 0) |
| 1816 | link_info.relro = TRUE; |
| 1817 | else if (strcmp (optarg, "norelro") == 0) |
| 1818 | link_info.relro = FALSE; |
| 1819 | /* What about the other Solaris -z options? FIXME. */ |
| 1820 | break; |
| 1821 | EOF |
| 1822 | fi |
| 1823 | |
| 1824 | if test -n "$PARSE_AND_LIST_ARGS_CASES" ; then |
| 1825 | cat >>e${EMULATION_NAME}.c <<EOF |
| 1826 | $PARSE_AND_LIST_ARGS_CASES |
| 1827 | EOF |
| 1828 | fi |
| 1829 | |
| 1830 | cat >>e${EMULATION_NAME}.c <<EOF |
| 1831 | } |
| 1832 | |
| 1833 | return TRUE; |
| 1834 | } |
| 1835 | |
| 1836 | EOF |
| 1837 | |
| 1838 | if test x"$LDEMUL_LIST_OPTIONS" != xgld"$EMULATION_NAME"_list_options; then |
| 1839 | cat >>e${EMULATION_NAME}.c <<EOF |
| 1840 | |
| 1841 | static void |
| 1842 | gld${EMULATION_NAME}_list_options (FILE * file) |
| 1843 | { |
| 1844 | EOF |
| 1845 | |
| 1846 | if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then |
| 1847 | cat >>e${EMULATION_NAME}.c <<EOF |
| 1848 | fprintf (file, _(" -Bgroup\t\tSelects group name lookup rules for DSO\n")); |
| 1849 | fprintf (file, _(" --disable-new-dtags\tDisable new dynamic tags\n")); |
| 1850 | fprintf (file, _(" --enable-new-dtags\tEnable new dynamic tags\n")); |
| 1851 | fprintf (file, _(" --eh-frame-hdr\tCreate .eh_frame_hdr section\n")); |
| 1852 | fprintf (file, _(" -z combreloc\t\tMerge dynamic relocs into one section and sort\n")); |
| 1853 | fprintf (file, _(" -z defs\t\tReport unresolved symbols in object files.\n")); |
| 1854 | fprintf (file, _(" -z execstack\t\tMark executable as requiring executable stack\n")); |
| 1855 | fprintf (file, _(" -z initfirst\t\tMark DSO to be initialized first at runtime\n")); |
| 1856 | fprintf (file, _(" -z interpose\t\tMark object to interpose all DSOs but executable\n")); |
| 1857 | fprintf (file, _(" -z loadfltr\t\tMark object requiring immediate process\n")); |
| 1858 | fprintf (file, _(" -z muldefs\t\tAllow multiple definitions\n")); |
| 1859 | fprintf (file, _(" -z nocombreloc\tDon't merge dynamic relocs into one section\n")); |
| 1860 | fprintf (file, _(" -z nocopyreloc\tDon't create copy relocs\n")); |
| 1861 | fprintf (file, _(" -z nodefaultlib\tMark object not to use default search paths\n")); |
| 1862 | fprintf (file, _(" -z nodelete\t\tMark DSO non-deletable at runtime\n")); |
| 1863 | fprintf (file, _(" -z nodlopen\t\tMark DSO not available to dlopen\n")); |
| 1864 | fprintf (file, _(" -z nodump\t\tMark DSO not available to dldump\n")); |
| 1865 | fprintf (file, _(" -z noexecstack\tMark executable as not requiring executable stack\n")); |
| 1866 | fprintf (file, _(" -z norelro\t\tDon't create RELRO program header\n")); |
| 1867 | fprintf (file, _(" -z now\t\tMark object non-lazy runtime binding\n")); |
| 1868 | fprintf (file, _(" -z origin\t\tMark object requiring immediate \$ORIGIN processing\n\t\t\t at runtime\n")); |
| 1869 | fprintf (file, _(" -z relro\t\tCreate RELRO program header\n")); |
| 1870 | fprintf (file, _(" -z KEYWORD\t\tIgnored for Solaris compatibility\n")); |
| 1871 | EOF |
| 1872 | fi |
| 1873 | |
| 1874 | if test -n "$PARSE_AND_LIST_OPTIONS" ; then |
| 1875 | cat >>e${EMULATION_NAME}.c <<EOF |
| 1876 | $PARSE_AND_LIST_OPTIONS |
| 1877 | EOF |
| 1878 | fi |
| 1879 | |
| 1880 | cat >>e${EMULATION_NAME}.c <<EOF |
| 1881 | } |
| 1882 | EOF |
| 1883 | |
| 1884 | if test -n "$PARSE_AND_LIST_EPILOGUE" ; then |
| 1885 | cat >>e${EMULATION_NAME}.c <<EOF |
| 1886 | $PARSE_AND_LIST_EPILOGUE |
| 1887 | EOF |
| 1888 | fi |
| 1889 | fi |
| 1890 | else |
| 1891 | cat >>e${EMULATION_NAME}.c <<EOF |
| 1892 | #define gld${EMULATION_NAME}_add_options NULL |
| 1893 | #define gld${EMULATION_NAME}_handle_option NULL |
| 1894 | EOF |
| 1895 | if test x"$LDEMUL_LIST_OPTIONS" != xgld"$EMULATION_NAME"_list_options; then |
| 1896 | cat >>e${EMULATION_NAME}.c <<EOF |
| 1897 | #define gld${EMULATION_NAME}_list_options NULL |
| 1898 | EOF |
| 1899 | fi |
| 1900 | fi |
| 1901 | |
| 1902 | cat >>e${EMULATION_NAME}.c <<EOF |
| 1903 | |
| 1904 | struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation = |
| 1905 | { |
| 1906 | ${LDEMUL_BEFORE_PARSE-gld${EMULATION_NAME}_before_parse}, |
| 1907 | ${LDEMUL_SYSLIB-syslib_default}, |
| 1908 | ${LDEMUL_HLL-hll_default}, |
| 1909 | ${LDEMUL_AFTER_PARSE-after_parse_default}, |
| 1910 | ${LDEMUL_AFTER_OPEN-gld${EMULATION_NAME}_after_open}, |
| 1911 | ${LDEMUL_AFTER_ALLOCATION-after_allocation_default}, |
| 1912 | ${LDEMUL_SET_OUTPUT_ARCH-set_output_arch_default}, |
| 1913 | ${LDEMUL_CHOOSE_TARGET-ldemul_default_target}, |
| 1914 | ${LDEMUL_BEFORE_ALLOCATION-gld${EMULATION_NAME}_before_allocation}, |
| 1915 | ${LDEMUL_GET_SCRIPT-gld${EMULATION_NAME}_get_script}, |
| 1916 | "${EMULATION_NAME}", |
| 1917 | "${OUTPUT_FORMAT}", |
| 1918 | ${LDEMUL_FINISH-gld${EMULATION_NAME}_finish}, |
| 1919 | ${LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS-NULL}, |
| 1920 | ${LDEMUL_OPEN_DYNAMIC_ARCHIVE-gld${EMULATION_NAME}_open_dynamic_archive}, |
| 1921 | ${LDEMUL_PLACE_ORPHAN-gld${EMULATION_NAME}_place_orphan}, |
| 1922 | ${LDEMUL_SET_SYMBOLS-NULL}, |
| 1923 | ${LDEMUL_PARSE_ARGS-NULL}, |
| 1924 | gld${EMULATION_NAME}_add_options, |
| 1925 | gld${EMULATION_NAME}_handle_option, |
| 1926 | ${LDEMUL_UNRECOGNIZED_FILE-NULL}, |
| 1927 | ${LDEMUL_LIST_OPTIONS-gld${EMULATION_NAME}_list_options}, |
| 1928 | ${LDEMUL_RECOGNIZED_FILE-gld${EMULATION_NAME}_load_symbols}, |
| 1929 | ${LDEMUL_FIND_POTENTIAL_LIBRARIES-NULL}, |
| 1930 | ${LDEMUL_NEW_VERS_PATTERN-NULL} |
| 1931 | }; |
| 1932 | EOF |