| 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 | fragment <<EOF |
| 12 | /* This file is is generated by a shell script. DO NOT EDIT! */ |
| 13 | |
| 14 | /* ${ELFSIZE} bit ELF emulation code for ${EMULATION_NAME} |
| 15 | Copyright (C) 1991-2014 Free Software Foundation, Inc. |
| 16 | Written by Steve Chamberlain <sac@cygnus.com> |
| 17 | ELF support by Ian Lance Taylor <ian@cygnus.com> |
| 18 | |
| 19 | This file is part of the GNU Binutils. |
| 20 | |
| 21 | This program is free software; you can redistribute it and/or modify |
| 22 | it under the terms of the GNU General Public License as published by |
| 23 | the Free Software Foundation; either version 3 of the License, or |
| 24 | (at your option) any later version. |
| 25 | |
| 26 | This program is distributed in the hope that it will be useful, |
| 27 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 28 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 29 | GNU General Public License for more details. |
| 30 | |
| 31 | You should have received a copy of the GNU General Public License |
| 32 | along with this program; if not, write to the Free Software |
| 33 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 34 | MA 02110-1301, USA. */ |
| 35 | |
| 36 | #define TARGET_IS_${EMULATION_NAME} |
| 37 | |
| 38 | #include "sysdep.h" |
| 39 | #include "bfd.h" |
| 40 | #include "libiberty.h" |
| 41 | #include "safe-ctype.h" |
| 42 | #include "filenames.h" |
| 43 | #include "getopt.h" |
| 44 | #include <fcntl.h> |
| 45 | |
| 46 | #include "bfdlink.h" |
| 47 | |
| 48 | #include "ld.h" |
| 49 | #include "ldmain.h" |
| 50 | #include "ldmisc.h" |
| 51 | #include "ldexp.h" |
| 52 | #include "ldlang.h" |
| 53 | #include "ldfile.h" |
| 54 | #include "ldemul.h" |
| 55 | #include "ldbuildid.h" |
| 56 | #include <ldgram.h> |
| 57 | #include "elf/common.h" |
| 58 | #include "elf-bfd.h" |
| 59 | #include "filenames.h" |
| 60 | |
| 61 | /* Declare functions used by various EXTRA_EM_FILEs. */ |
| 62 | static void gld${EMULATION_NAME}_before_parse (void); |
| 63 | static void gld${EMULATION_NAME}_after_open (void); |
| 64 | static void gld${EMULATION_NAME}_before_allocation (void); |
| 65 | static void gld${EMULATION_NAME}_after_allocation (void); |
| 66 | static lang_output_section_statement_type *gld${EMULATION_NAME}_place_orphan |
| 67 | (asection *, const char *, int); |
| 68 | EOF |
| 69 | |
| 70 | if [ "x${USE_LIBPATH}" = xyes ] ; then |
| 71 | case ${target} in |
| 72 | *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*) |
| 73 | fragment <<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 | source_em ${srcdir}/emultempl/elf-generic.em |
| 85 | if test -n "$EXTRA_EM_FILE" ; then |
| 86 | source_em ${srcdir}/emultempl/${EXTRA_EM_FILE}.em |
| 87 | fi |
| 88 | |
| 89 | # Functions in this file can be overridden by setting the LDEMUL_* shell |
| 90 | # variables. If the name of the overriding function is the same as is |
| 91 | # defined in this file, then don't output this file's version. |
| 92 | # If a different overriding name is given then output the standard function |
| 93 | # as presumably it is called from the overriding function. |
| 94 | # |
| 95 | if test x"$LDEMUL_BEFORE_PARSE" != xgld"$EMULATION_NAME"_before_parse; then |
| 96 | fragment <<EOF |
| 97 | |
| 98 | static void |
| 99 | gld${EMULATION_NAME}_before_parse (void) |
| 100 | { |
| 101 | ldfile_set_output_arch ("${OUTPUT_ARCH}", bfd_arch_`echo ${ARCH} | sed -e 's/:.*//'`); |
| 102 | input_flags.dynamic = ${DYNAMIC_LINK-TRUE}; |
| 103 | config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo TRUE ; else echo FALSE ; fi`; |
| 104 | config.separate_code = `if test "x${SEPARATE_CODE}" = xyes ; then echo TRUE ; else echo FALSE ; fi`; |
| 105 | } |
| 106 | |
| 107 | EOF |
| 108 | fi |
| 109 | |
| 110 | if test x"$LDEMUL_RECOGNIZED_FILE" != xgld"${EMULATION_NAME}"_load_symbols; then |
| 111 | fragment <<EOF |
| 112 | /* Handle the generation of DT_NEEDED tags. */ |
| 113 | |
| 114 | static bfd_boolean |
| 115 | gld${EMULATION_NAME}_load_symbols (lang_input_statement_type *entry) |
| 116 | { |
| 117 | int link_class = 0; |
| 118 | |
| 119 | /* Tell the ELF linker that we don't want the output file to have a |
| 120 | DT_NEEDED entry for this file, unless it is used to resolve |
| 121 | references in a regular object. */ |
| 122 | if (entry->flags.add_DT_NEEDED_for_regular) |
| 123 | link_class = DYN_AS_NEEDED; |
| 124 | |
| 125 | /* Tell the ELF linker that we don't want the output file to have a |
| 126 | DT_NEEDED entry for any dynamic library in DT_NEEDED tags from |
| 127 | this file at all. */ |
| 128 | if (!entry->flags.add_DT_NEEDED_for_dynamic) |
| 129 | link_class |= DYN_NO_ADD_NEEDED; |
| 130 | |
| 131 | if (entry->flags.just_syms |
| 132 | && (bfd_get_file_flags (entry->the_bfd) & DYNAMIC) != 0) |
| 133 | einfo (_("%P%F: --just-symbols may not be used on DSO: %B\n"), |
| 134 | entry->the_bfd); |
| 135 | |
| 136 | if (link_class == 0 |
| 137 | || (bfd_get_file_flags (entry->the_bfd) & DYNAMIC) == 0) |
| 138 | return FALSE; |
| 139 | |
| 140 | bfd_elf_set_dyn_lib_class (entry->the_bfd, |
| 141 | (enum dynamic_lib_link_class) link_class); |
| 142 | |
| 143 | /* Continue on with normal load_symbols processing. */ |
| 144 | return FALSE; |
| 145 | } |
| 146 | EOF |
| 147 | fi |
| 148 | |
| 149 | fragment <<EOF |
| 150 | |
| 151 | /* These variables are required to pass information back and forth |
| 152 | between after_open and check_needed and stat_needed and vercheck. */ |
| 153 | |
| 154 | static struct bfd_link_needed_list *global_needed; |
| 155 | static struct stat global_stat; |
| 156 | static lang_input_statement_type *global_found; |
| 157 | static struct bfd_link_needed_list *global_vercheck_needed; |
| 158 | static bfd_boolean global_vercheck_failed; |
| 159 | |
| 160 | /* These variables are used to implement target options */ |
| 161 | |
| 162 | static char *audit; /* colon (typically) separated list of libs */ |
| 163 | static char *depaudit; /* colon (typically) separated list of libs */ |
| 164 | |
| 165 | /* Style of .note.gnu.build-id section. */ |
| 166 | static const char *emit_note_gnu_build_id; |
| 167 | |
| 168 | /* On Linux, it's possible to have different versions of the same |
| 169 | shared library linked against different versions of libc. The |
| 170 | dynamic linker somehow tags which libc version to use in |
| 171 | /etc/ld.so.cache, and, based on the libc that it sees in the |
| 172 | executable, chooses which version of the shared library to use. |
| 173 | |
| 174 | We try to do a similar check here by checking whether this shared |
| 175 | library needs any other shared libraries which may conflict with |
| 176 | libraries we have already included in the link. If it does, we |
| 177 | skip it, and try to find another shared library farther on down the |
| 178 | link path. |
| 179 | |
| 180 | This is called via lang_for_each_input_file. |
| 181 | GLOBAL_VERCHECK_NEEDED is the list of objects needed by the object |
| 182 | which we are checking. This sets GLOBAL_VERCHECK_FAILED if we find |
| 183 | a conflicting version. */ |
| 184 | |
| 185 | static void |
| 186 | gld${EMULATION_NAME}_vercheck (lang_input_statement_type *s) |
| 187 | { |
| 188 | const char *soname; |
| 189 | struct bfd_link_needed_list *l; |
| 190 | |
| 191 | if (global_vercheck_failed) |
| 192 | return; |
| 193 | if (s->the_bfd == NULL |
| 194 | || (bfd_get_file_flags (s->the_bfd) & DYNAMIC) == 0) |
| 195 | return; |
| 196 | |
| 197 | soname = bfd_elf_get_dt_soname (s->the_bfd); |
| 198 | if (soname == NULL) |
| 199 | soname = lbasename (bfd_get_filename (s->the_bfd)); |
| 200 | |
| 201 | for (l = global_vercheck_needed; l != NULL; l = l->next) |
| 202 | { |
| 203 | const char *suffix; |
| 204 | |
| 205 | if (filename_cmp (soname, l->name) == 0) |
| 206 | { |
| 207 | /* Probably can't happen, but it's an easy check. */ |
| 208 | continue; |
| 209 | } |
| 210 | |
| 211 | if (strchr (l->name, '/') != NULL) |
| 212 | continue; |
| 213 | |
| 214 | suffix = strstr (l->name, ".so."); |
| 215 | if (suffix == NULL) |
| 216 | continue; |
| 217 | |
| 218 | suffix += sizeof ".so." - 1; |
| 219 | |
| 220 | if (filename_ncmp (soname, l->name, suffix - l->name) == 0) |
| 221 | { |
| 222 | /* Here we know that S is a dynamic object FOO.SO.VER1, and |
| 223 | the object we are considering needs a dynamic object |
| 224 | FOO.SO.VER2, and VER1 and VER2 are different. This |
| 225 | appears to be a version mismatch, so we tell the caller |
| 226 | to try a different version of this library. */ |
| 227 | global_vercheck_failed = TRUE; |
| 228 | return; |
| 229 | } |
| 230 | } |
| 231 | } |
| 232 | |
| 233 | |
| 234 | /* See if an input file matches a DT_NEEDED entry by running stat on |
| 235 | the file. */ |
| 236 | |
| 237 | static void |
| 238 | gld${EMULATION_NAME}_stat_needed (lang_input_statement_type *s) |
| 239 | { |
| 240 | struct stat st; |
| 241 | const char *suffix; |
| 242 | const char *soname; |
| 243 | |
| 244 | if (global_found != NULL) |
| 245 | return; |
| 246 | if (s->the_bfd == NULL) |
| 247 | return; |
| 248 | |
| 249 | /* If this input file was an as-needed entry, and wasn't found to be |
| 250 | needed at the stage it was linked, then don't say we have loaded it. */ |
| 251 | if ((bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0) |
| 252 | return; |
| 253 | |
| 254 | if (bfd_stat (s->the_bfd, &st) != 0) |
| 255 | { |
| 256 | einfo ("%P:%B: bfd_stat failed: %E\n", s->the_bfd); |
| 257 | return; |
| 258 | } |
| 259 | |
| 260 | /* Some operating systems, e.g. Windows, do not provide a meaningful |
| 261 | st_ino; they always set it to zero. (Windows does provide a |
| 262 | meaningful st_dev.) Do not indicate a duplicate library in that |
| 263 | case. While there is no guarantee that a system that provides |
| 264 | meaningful inode numbers will never set st_ino to zero, this is |
| 265 | merely an optimization, so we do not need to worry about false |
| 266 | negatives. */ |
| 267 | if (st.st_dev == global_stat.st_dev |
| 268 | && st.st_ino == global_stat.st_ino |
| 269 | && st.st_ino != 0) |
| 270 | { |
| 271 | global_found = s; |
| 272 | return; |
| 273 | } |
| 274 | |
| 275 | /* We issue a warning if it looks like we are including two |
| 276 | different versions of the same shared library. For example, |
| 277 | there may be a problem if -lc picks up libc.so.6 but some other |
| 278 | shared library has a DT_NEEDED entry of libc.so.5. This is a |
| 279 | heuristic test, and it will only work if the name looks like |
| 280 | NAME.so.VERSION. FIXME: Depending on file names is error-prone. |
| 281 | If we really want to issue warnings about mixing version numbers |
| 282 | of shared libraries, we need to find a better way. */ |
| 283 | |
| 284 | if (strchr (global_needed->name, '/') != NULL) |
| 285 | return; |
| 286 | suffix = strstr (global_needed->name, ".so."); |
| 287 | if (suffix == NULL) |
| 288 | return; |
| 289 | suffix += sizeof ".so." - 1; |
| 290 | |
| 291 | soname = bfd_elf_get_dt_soname (s->the_bfd); |
| 292 | if (soname == NULL) |
| 293 | soname = lbasename (s->filename); |
| 294 | |
| 295 | if (filename_ncmp (soname, global_needed->name, suffix - global_needed->name) == 0) |
| 296 | einfo ("%P: warning: %s, needed by %B, may conflict with %s\n", |
| 297 | global_needed->name, global_needed->by, soname); |
| 298 | } |
| 299 | |
| 300 | struct dt_needed |
| 301 | { |
| 302 | bfd *by; |
| 303 | const char *name; |
| 304 | }; |
| 305 | |
| 306 | /* This function is called for each possible name for a dynamic object |
| 307 | named by a DT_NEEDED entry. The FORCE parameter indicates whether |
| 308 | to skip the check for a conflicting version. */ |
| 309 | |
| 310 | static bfd_boolean |
| 311 | gld${EMULATION_NAME}_try_needed (struct dt_needed *needed, |
| 312 | int force) |
| 313 | { |
| 314 | bfd *abfd; |
| 315 | const char *name = needed->name; |
| 316 | const char *soname; |
| 317 | int link_class; |
| 318 | |
| 319 | abfd = bfd_openr (name, bfd_get_target (link_info.output_bfd)); |
| 320 | if (abfd == NULL) |
| 321 | return FALSE; |
| 322 | |
| 323 | /* Linker needs to decompress sections. */ |
| 324 | abfd->flags |= BFD_DECOMPRESS; |
| 325 | |
| 326 | if (! bfd_check_format (abfd, bfd_object)) |
| 327 | { |
| 328 | bfd_close (abfd); |
| 329 | return FALSE; |
| 330 | } |
| 331 | if ((bfd_get_file_flags (abfd) & DYNAMIC) == 0) |
| 332 | { |
| 333 | bfd_close (abfd); |
| 334 | return FALSE; |
| 335 | } |
| 336 | |
| 337 | /* For DT_NEEDED, they have to match. */ |
| 338 | if (abfd->xvec != link_info.output_bfd->xvec) |
| 339 | { |
| 340 | bfd_close (abfd); |
| 341 | return FALSE; |
| 342 | } |
| 343 | |
| 344 | /* Check whether this object would include any conflicting library |
| 345 | versions. If FORCE is set, then we skip this check; we use this |
| 346 | the second time around, if we couldn't find any compatible |
| 347 | instance of the shared library. */ |
| 348 | |
| 349 | if (! force) |
| 350 | { |
| 351 | struct bfd_link_needed_list *needs; |
| 352 | |
| 353 | if (! bfd_elf_get_bfd_needed_list (abfd, &needs)) |
| 354 | einfo ("%F%P:%B: bfd_elf_get_bfd_needed_list failed: %E\n", abfd); |
| 355 | |
| 356 | if (needs != NULL) |
| 357 | { |
| 358 | global_vercheck_needed = needs; |
| 359 | global_vercheck_failed = FALSE; |
| 360 | lang_for_each_input_file (gld${EMULATION_NAME}_vercheck); |
| 361 | if (global_vercheck_failed) |
| 362 | { |
| 363 | bfd_close (abfd); |
| 364 | /* Return FALSE to force the caller to move on to try |
| 365 | another file on the search path. */ |
| 366 | return FALSE; |
| 367 | } |
| 368 | |
| 369 | /* But wait! It gets much worse. On Linux, if a shared |
| 370 | library does not use libc at all, we are supposed to skip |
| 371 | it the first time around in case we encounter a shared |
| 372 | library later on with the same name which does use the |
| 373 | version of libc that we want. This is much too horrible |
| 374 | to use on any system other than Linux. */ |
| 375 | |
| 376 | EOF |
| 377 | case ${target} in |
| 378 | *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*) |
| 379 | fragment <<EOF |
| 380 | { |
| 381 | struct bfd_link_needed_list *l; |
| 382 | |
| 383 | for (l = needs; l != NULL; l = l->next) |
| 384 | if (CONST_STRNEQ (l->name, "libc.so")) |
| 385 | break; |
| 386 | if (l == NULL) |
| 387 | { |
| 388 | bfd_close (abfd); |
| 389 | return FALSE; |
| 390 | } |
| 391 | } |
| 392 | |
| 393 | EOF |
| 394 | ;; |
| 395 | esac |
| 396 | fragment <<EOF |
| 397 | } |
| 398 | } |
| 399 | |
| 400 | /* We've found a dynamic object matching the DT_NEEDED entry. */ |
| 401 | |
| 402 | /* We have already checked that there is no other input file of the |
| 403 | same name. We must now check again that we are not including the |
| 404 | same file twice. We need to do this because on many systems |
| 405 | libc.so is a symlink to, e.g., libc.so.1. The SONAME entry will |
| 406 | reference libc.so.1. If we have already included libc.so, we |
| 407 | don't want to include libc.so.1 if they are the same file, and we |
| 408 | can only check that using stat. */ |
| 409 | |
| 410 | if (bfd_stat (abfd, &global_stat) != 0) |
| 411 | einfo ("%F%P:%B: bfd_stat failed: %E\n", abfd); |
| 412 | |
| 413 | /* First strip off everything before the last '/'. */ |
| 414 | soname = lbasename (abfd->filename); |
| 415 | |
| 416 | if (verbose) |
| 417 | info_msg (_("found %s at %s\n"), soname, name); |
| 418 | |
| 419 | global_found = NULL; |
| 420 | lang_for_each_input_file (gld${EMULATION_NAME}_stat_needed); |
| 421 | if (global_found != NULL) |
| 422 | { |
| 423 | /* Return TRUE to indicate that we found the file, even though |
| 424 | we aren't going to do anything with it. */ |
| 425 | return TRUE; |
| 426 | } |
| 427 | |
| 428 | /* Specify the soname to use. */ |
| 429 | bfd_elf_set_dt_needed_name (abfd, soname); |
| 430 | |
| 431 | /* Tell the ELF linker that we don't want the output file to have a |
| 432 | DT_NEEDED entry for this file, unless it is used to resolve |
| 433 | references in a regular object. */ |
| 434 | link_class = DYN_DT_NEEDED; |
| 435 | |
| 436 | /* Tell the ELF linker that we don't want the output file to have a |
| 437 | DT_NEEDED entry for this file at all if the entry is from a file |
| 438 | with DYN_NO_ADD_NEEDED. */ |
| 439 | if (needed->by != NULL |
| 440 | && (bfd_elf_get_dyn_lib_class (needed->by) & DYN_NO_ADD_NEEDED) != 0) |
| 441 | link_class |= DYN_NO_NEEDED | DYN_NO_ADD_NEEDED; |
| 442 | |
| 443 | bfd_elf_set_dyn_lib_class (abfd, (enum dynamic_lib_link_class) link_class); |
| 444 | |
| 445 | /* Add this file into the symbol table. */ |
| 446 | if (! bfd_link_add_symbols (abfd, &link_info)) |
| 447 | einfo ("%F%B: error adding symbols: %E\n", abfd); |
| 448 | |
| 449 | return TRUE; |
| 450 | } |
| 451 | |
| 452 | |
| 453 | /* Search for a needed file in a path. */ |
| 454 | |
| 455 | static bfd_boolean |
| 456 | gld${EMULATION_NAME}_search_needed (const char *path, |
| 457 | struct dt_needed *n, int force) |
| 458 | { |
| 459 | const char *s; |
| 460 | const char *name = n->name; |
| 461 | size_t len; |
| 462 | struct dt_needed needed; |
| 463 | |
| 464 | if (name[0] == '/') |
| 465 | return gld${EMULATION_NAME}_try_needed (n, force); |
| 466 | |
| 467 | if (path == NULL || *path == '\0') |
| 468 | return FALSE; |
| 469 | |
| 470 | needed.by = n->by; |
| 471 | needed.name = n->name; |
| 472 | |
| 473 | len = strlen (name); |
| 474 | while (1) |
| 475 | { |
| 476 | char *filename, *sset; |
| 477 | |
| 478 | s = strchr (path, config.rpath_separator); |
| 479 | if (s == NULL) |
| 480 | s = path + strlen (path); |
| 481 | |
| 482 | #if HAVE_DOS_BASED_FILE_SYSTEM |
| 483 | /* Assume a match on the second char is part of drive specifier. */ |
| 484 | else if (config.rpath_separator == ':' |
| 485 | && s == path + 1 |
| 486 | && ISALPHA (*path)) |
| 487 | { |
| 488 | s = strchr (s + 1, config.rpath_separator); |
| 489 | if (s == NULL) |
| 490 | s = path + strlen (path); |
| 491 | } |
| 492 | #endif |
| 493 | filename = (char *) xmalloc (s - path + len + 2); |
| 494 | if (s == path) |
| 495 | sset = filename; |
| 496 | else |
| 497 | { |
| 498 | memcpy (filename, path, s - path); |
| 499 | filename[s - path] = '/'; |
| 500 | sset = filename + (s - path) + 1; |
| 501 | } |
| 502 | strcpy (sset, name); |
| 503 | |
| 504 | needed.name = filename; |
| 505 | if (gld${EMULATION_NAME}_try_needed (&needed, force)) |
| 506 | return TRUE; |
| 507 | |
| 508 | free (filename); |
| 509 | |
| 510 | if (*s == '\0') |
| 511 | break; |
| 512 | path = s + 1; |
| 513 | } |
| 514 | |
| 515 | return FALSE; |
| 516 | } |
| 517 | |
| 518 | EOF |
| 519 | if [ "x${USE_LIBPATH}" = xyes ] ; then |
| 520 | fragment <<EOF |
| 521 | |
| 522 | /* Add the sysroot to every entry in a path separated by |
| 523 | config.rpath_separator. */ |
| 524 | |
| 525 | static char * |
| 526 | gld${EMULATION_NAME}_add_sysroot (const char *path) |
| 527 | { |
| 528 | int len, colons, i; |
| 529 | char *ret, *p; |
| 530 | |
| 531 | len = strlen (path); |
| 532 | colons = 0; |
| 533 | i = 0; |
| 534 | while (path[i]) |
| 535 | if (path[i++] == config.rpath_separator) |
| 536 | colons++; |
| 537 | |
| 538 | if (path[i]) |
| 539 | colons++; |
| 540 | |
| 541 | len = len + (colons + 1) * strlen (ld_sysroot); |
| 542 | ret = xmalloc (len + 1); |
| 543 | strcpy (ret, ld_sysroot); |
| 544 | p = ret + strlen (ret); |
| 545 | i = 0; |
| 546 | while (path[i]) |
| 547 | if (path[i] == config.rpath_separator) |
| 548 | { |
| 549 | *p++ = path[i++]; |
| 550 | strcpy (p, ld_sysroot); |
| 551 | p = p + strlen (p); |
| 552 | } |
| 553 | else |
| 554 | *p++ = path[i++]; |
| 555 | |
| 556 | *p = 0; |
| 557 | return ret; |
| 558 | } |
| 559 | |
| 560 | EOF |
| 561 | case ${target} in |
| 562 | *-*-freebsd* | *-*-dragonfly*) |
| 563 | fragment <<EOF |
| 564 | /* Read the system search path the FreeBSD way rather than the Linux way. */ |
| 565 | #ifdef HAVE_ELF_HINTS_H |
| 566 | #include <elf-hints.h> |
| 567 | #else |
| 568 | #include "elf-hints-local.h" |
| 569 | #endif |
| 570 | |
| 571 | static bfd_boolean |
| 572 | gld${EMULATION_NAME}_check_ld_elf_hints (const struct bfd_link_needed_list *l, |
| 573 | int force) |
| 574 | { |
| 575 | static bfd_boolean initialized; |
| 576 | static char *ld_elf_hints; |
| 577 | struct dt_needed needed; |
| 578 | |
| 579 | if (!initialized) |
| 580 | { |
| 581 | FILE *f; |
| 582 | char *tmppath; |
| 583 | |
| 584 | tmppath = concat (ld_sysroot, _PATH_ELF_HINTS, (const char *) NULL); |
| 585 | f = fopen (tmppath, FOPEN_RB); |
| 586 | free (tmppath); |
| 587 | if (f != NULL) |
| 588 | { |
| 589 | struct elfhints_hdr hdr; |
| 590 | |
| 591 | if (fread (&hdr, 1, sizeof (hdr), f) == sizeof (hdr) |
| 592 | && hdr.magic == ELFHINTS_MAGIC |
| 593 | && hdr.version == 1) |
| 594 | { |
| 595 | if (fseek (f, hdr.strtab + hdr.dirlist, SEEK_SET) != -1) |
| 596 | { |
| 597 | char *b; |
| 598 | |
| 599 | b = xmalloc (hdr.dirlistlen + 1); |
| 600 | if (fread (b, 1, hdr.dirlistlen + 1, f) == |
| 601 | hdr.dirlistlen + 1) |
| 602 | ld_elf_hints = gld${EMULATION_NAME}_add_sysroot (b); |
| 603 | |
| 604 | free (b); |
| 605 | } |
| 606 | } |
| 607 | fclose (f); |
| 608 | } |
| 609 | |
| 610 | initialized = TRUE; |
| 611 | } |
| 612 | |
| 613 | if (ld_elf_hints == NULL) |
| 614 | return FALSE; |
| 615 | |
| 616 | needed.by = l->by; |
| 617 | needed.name = l->name; |
| 618 | return gld${EMULATION_NAME}_search_needed (ld_elf_hints, &needed, force); |
| 619 | } |
| 620 | EOF |
| 621 | # FreeBSD |
| 622 | ;; |
| 623 | |
| 624 | *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*) |
| 625 | fragment <<EOF |
| 626 | /* For a native linker, check the file /etc/ld.so.conf for directories |
| 627 | in which we may find shared libraries. /etc/ld.so.conf is really |
| 628 | only meaningful on Linux. */ |
| 629 | |
| 630 | struct gld${EMULATION_NAME}_ld_so_conf |
| 631 | { |
| 632 | char *path; |
| 633 | size_t len, alloc; |
| 634 | }; |
| 635 | |
| 636 | static bfd_boolean |
| 637 | gld${EMULATION_NAME}_parse_ld_so_conf |
| 638 | (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename); |
| 639 | |
| 640 | static void |
| 641 | gld${EMULATION_NAME}_parse_ld_so_conf_include |
| 642 | (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename, |
| 643 | const char *pattern) |
| 644 | { |
| 645 | char *newp = NULL; |
| 646 | #ifdef HAVE_GLOB |
| 647 | glob_t gl; |
| 648 | #endif |
| 649 | |
| 650 | if (pattern[0] != '/') |
| 651 | { |
| 652 | char *p = strrchr (filename, '/'); |
| 653 | size_t patlen = strlen (pattern) + 1; |
| 654 | |
| 655 | newp = xmalloc (p - filename + 1 + patlen); |
| 656 | memcpy (newp, filename, p - filename + 1); |
| 657 | memcpy (newp + (p - filename + 1), pattern, patlen); |
| 658 | pattern = newp; |
| 659 | } |
| 660 | |
| 661 | #ifdef HAVE_GLOB |
| 662 | if (glob (pattern, 0, NULL, &gl) == 0) |
| 663 | { |
| 664 | size_t i; |
| 665 | |
| 666 | for (i = 0; i < gl.gl_pathc; ++i) |
| 667 | gld${EMULATION_NAME}_parse_ld_so_conf (info, gl.gl_pathv[i]); |
| 668 | globfree (&gl); |
| 669 | } |
| 670 | #else |
| 671 | /* If we do not have glob, treat the pattern as a literal filename. */ |
| 672 | gld${EMULATION_NAME}_parse_ld_so_conf (info, pattern); |
| 673 | #endif |
| 674 | |
| 675 | if (newp) |
| 676 | free (newp); |
| 677 | } |
| 678 | |
| 679 | static bfd_boolean |
| 680 | gld${EMULATION_NAME}_parse_ld_so_conf |
| 681 | (struct gld${EMULATION_NAME}_ld_so_conf *info, const char *filename) |
| 682 | { |
| 683 | FILE *f = fopen (filename, FOPEN_RT); |
| 684 | char *line; |
| 685 | size_t linelen; |
| 686 | |
| 687 | if (f == NULL) |
| 688 | return FALSE; |
| 689 | |
| 690 | linelen = 256; |
| 691 | line = xmalloc (linelen); |
| 692 | do |
| 693 | { |
| 694 | char *p = line, *q; |
| 695 | |
| 696 | /* Normally this would use getline(3), but we need to be portable. */ |
| 697 | while ((q = fgets (p, linelen - (p - line), f)) != NULL |
| 698 | && strlen (q) == linelen - (p - line) - 1 |
| 699 | && line[linelen - 2] != '\n') |
| 700 | { |
| 701 | line = xrealloc (line, 2 * linelen); |
| 702 | p = line + linelen - 1; |
| 703 | linelen += linelen; |
| 704 | } |
| 705 | |
| 706 | if (q == NULL && p == line) |
| 707 | break; |
| 708 | |
| 709 | p = strchr (line, '\n'); |
| 710 | if (p) |
| 711 | *p = '\0'; |
| 712 | |
| 713 | /* Because the file format does not know any form of quoting we |
| 714 | can search forward for the next '#' character and if found |
| 715 | make it terminating the line. */ |
| 716 | p = strchr (line, '#'); |
| 717 | if (p) |
| 718 | *p = '\0'; |
| 719 | |
| 720 | /* Remove leading whitespace. NUL is no whitespace character. */ |
| 721 | p = line; |
| 722 | while (*p == ' ' || *p == '\f' || *p == '\r' || *p == '\t' || *p == '\v') |
| 723 | ++p; |
| 724 | |
| 725 | /* If the line is blank it is ignored. */ |
| 726 | if (p[0] == '\0') |
| 727 | continue; |
| 728 | |
| 729 | if (CONST_STRNEQ (p, "include") && (p[7] == ' ' || p[7] == '\t')) |
| 730 | { |
| 731 | char *dir, c; |
| 732 | p += 8; |
| 733 | do |
| 734 | { |
| 735 | while (*p == ' ' || *p == '\t') |
| 736 | ++p; |
| 737 | |
| 738 | if (*p == '\0') |
| 739 | break; |
| 740 | |
| 741 | dir = p; |
| 742 | |
| 743 | while (*p != ' ' && *p != '\t' && *p) |
| 744 | ++p; |
| 745 | |
| 746 | c = *p; |
| 747 | *p++ = '\0'; |
| 748 | if (dir[0] != '\0') |
| 749 | gld${EMULATION_NAME}_parse_ld_so_conf_include (info, filename, |
| 750 | dir); |
| 751 | } |
| 752 | while (c != '\0'); |
| 753 | } |
| 754 | else |
| 755 | { |
| 756 | char *dir = p; |
| 757 | while (*p && *p != '=' && *p != ' ' && *p != '\t' && *p != '\f' |
| 758 | && *p != '\r' && *p != '\v') |
| 759 | ++p; |
| 760 | |
| 761 | while (p != dir && p[-1] == '/') |
| 762 | --p; |
| 763 | if (info->path == NULL) |
| 764 | { |
| 765 | info->alloc = p - dir + 1 + 256; |
| 766 | info->path = xmalloc (info->alloc); |
| 767 | info->len = 0; |
| 768 | } |
| 769 | else |
| 770 | { |
| 771 | if (info->len + 1 + (p - dir) >= info->alloc) |
| 772 | { |
| 773 | info->alloc += p - dir + 256; |
| 774 | info->path = xrealloc (info->path, info->alloc); |
| 775 | } |
| 776 | info->path[info->len++] = config.rpath_separator; |
| 777 | } |
| 778 | memcpy (info->path + info->len, dir, p - dir); |
| 779 | info->len += p - dir; |
| 780 | info->path[info->len] = '\0'; |
| 781 | } |
| 782 | } |
| 783 | while (! feof (f)); |
| 784 | free (line); |
| 785 | fclose (f); |
| 786 | return TRUE; |
| 787 | } |
| 788 | |
| 789 | static bfd_boolean |
| 790 | gld${EMULATION_NAME}_check_ld_so_conf (const struct bfd_link_needed_list *l, |
| 791 | int force) |
| 792 | { |
| 793 | static bfd_boolean initialized; |
| 794 | static char *ld_so_conf; |
| 795 | struct dt_needed needed; |
| 796 | |
| 797 | if (! initialized) |
| 798 | { |
| 799 | char *tmppath; |
| 800 | struct gld${EMULATION_NAME}_ld_so_conf info; |
| 801 | |
| 802 | info.path = NULL; |
| 803 | info.len = info.alloc = 0; |
| 804 | tmppath = concat (ld_sysroot, "${prefix}/etc/ld.so.conf", |
| 805 | (const char *) NULL); |
| 806 | if (!gld${EMULATION_NAME}_parse_ld_so_conf (&info, tmppath)) |
| 807 | { |
| 808 | free (tmppath); |
| 809 | tmppath = concat (ld_sysroot, "/etc/ld.so.conf", |
| 810 | (const char *) NULL); |
| 811 | gld${EMULATION_NAME}_parse_ld_so_conf (&info, tmppath); |
| 812 | } |
| 813 | free (tmppath); |
| 814 | |
| 815 | if (info.path) |
| 816 | { |
| 817 | char *d = gld${EMULATION_NAME}_add_sysroot (info.path); |
| 818 | free (info.path); |
| 819 | ld_so_conf = d; |
| 820 | } |
| 821 | initialized = TRUE; |
| 822 | } |
| 823 | |
| 824 | if (ld_so_conf == NULL) |
| 825 | return FALSE; |
| 826 | |
| 827 | |
| 828 | needed.by = l->by; |
| 829 | needed.name = l->name; |
| 830 | return gld${EMULATION_NAME}_search_needed (ld_so_conf, &needed, force); |
| 831 | } |
| 832 | |
| 833 | EOF |
| 834 | # Linux |
| 835 | ;; |
| 836 | esac |
| 837 | fi |
| 838 | fragment <<EOF |
| 839 | |
| 840 | /* See if an input file matches a DT_NEEDED entry by name. */ |
| 841 | |
| 842 | static void |
| 843 | gld${EMULATION_NAME}_check_needed (lang_input_statement_type *s) |
| 844 | { |
| 845 | const char *soname; |
| 846 | |
| 847 | /* Stop looking if we've found a loaded lib. */ |
| 848 | if (global_found != NULL |
| 849 | && (bfd_elf_get_dyn_lib_class (global_found->the_bfd) |
| 850 | & DYN_AS_NEEDED) == 0) |
| 851 | return; |
| 852 | |
| 853 | if (s->filename == NULL || s->the_bfd == NULL) |
| 854 | return; |
| 855 | |
| 856 | /* Don't look for a second non-loaded as-needed lib. */ |
| 857 | if (global_found != NULL |
| 858 | && (bfd_elf_get_dyn_lib_class (s->the_bfd) & DYN_AS_NEEDED) != 0) |
| 859 | return; |
| 860 | |
| 861 | if (filename_cmp (s->filename, global_needed->name) == 0) |
| 862 | { |
| 863 | global_found = s; |
| 864 | return; |
| 865 | } |
| 866 | |
| 867 | if (s->flags.search_dirs) |
| 868 | { |
| 869 | const char *f = strrchr (s->filename, '/'); |
| 870 | if (f != NULL |
| 871 | && filename_cmp (f + 1, global_needed->name) == 0) |
| 872 | { |
| 873 | global_found = s; |
| 874 | return; |
| 875 | } |
| 876 | } |
| 877 | |
| 878 | soname = bfd_elf_get_dt_soname (s->the_bfd); |
| 879 | if (soname != NULL |
| 880 | && filename_cmp (soname, global_needed->name) == 0) |
| 881 | { |
| 882 | global_found = s; |
| 883 | return; |
| 884 | } |
| 885 | } |
| 886 | |
| 887 | EOF |
| 888 | |
| 889 | if test x"$LDEMUL_AFTER_OPEN" != xgld"$EMULATION_NAME"_after_open; then |
| 890 | fragment <<EOF |
| 891 | |
| 892 | static bfd_size_type |
| 893 | id_note_section_size (bfd *abfd ATTRIBUTE_UNUSED) |
| 894 | { |
| 895 | const char *style = emit_note_gnu_build_id; |
| 896 | bfd_size_type size; |
| 897 | bfd_size_type build_id_size; |
| 898 | |
| 899 | size = offsetof (Elf_External_Note, name[sizeof "GNU"]); |
| 900 | size = (size + 3) & -(bfd_size_type) 4; |
| 901 | |
| 902 | build_id_size = compute_build_id_size (style); |
| 903 | if (build_id_size) |
| 904 | size += build_id_size; |
| 905 | else |
| 906 | size = 0; |
| 907 | |
| 908 | return size; |
| 909 | } |
| 910 | |
| 911 | static bfd_boolean |
| 912 | write_build_id (bfd *abfd) |
| 913 | { |
| 914 | const struct elf_backend_data *bed = get_elf_backend_data (abfd); |
| 915 | struct elf_obj_tdata *t = elf_tdata (abfd); |
| 916 | const char *style; |
| 917 | asection *asec; |
| 918 | Elf_Internal_Shdr *i_shdr; |
| 919 | unsigned char *contents, *id_bits; |
| 920 | bfd_size_type size; |
| 921 | file_ptr position; |
| 922 | Elf_External_Note *e_note; |
| 923 | |
| 924 | style = t->o->build_id.style; |
| 925 | asec = t->o->build_id.sec; |
| 926 | if (bfd_is_abs_section (asec->output_section)) |
| 927 | { |
| 928 | einfo (_("%P: warning: .note.gnu.build-id section discarded," |
| 929 | " --build-id ignored.\n")); |
| 930 | return TRUE; |
| 931 | } |
| 932 | i_shdr = &elf_section_data (asec->output_section)->this_hdr; |
| 933 | |
| 934 | if (i_shdr->contents == NULL) |
| 935 | { |
| 936 | if (asec->contents == NULL) |
| 937 | asec->contents = (unsigned char *) xmalloc (asec->size); |
| 938 | contents = asec->contents; |
| 939 | } |
| 940 | else |
| 941 | contents = i_shdr->contents + asec->output_offset; |
| 942 | |
| 943 | e_note = (Elf_External_Note *) contents; |
| 944 | size = offsetof (Elf_External_Note, name[sizeof "GNU"]); |
| 945 | size = (size + 3) & -(bfd_size_type) 4; |
| 946 | id_bits = contents + size; |
| 947 | size = asec->size - size; |
| 948 | |
| 949 | bfd_h_put_32 (abfd, sizeof "GNU", &e_note->namesz); |
| 950 | bfd_h_put_32 (abfd, size, &e_note->descsz); |
| 951 | bfd_h_put_32 (abfd, NT_GNU_BUILD_ID, &e_note->type); |
| 952 | memcpy (e_note->name, "GNU", sizeof "GNU"); |
| 953 | |
| 954 | generate_build_id (abfd, style, bed->s->checksum_contents, id_bits, size); |
| 955 | |
| 956 | position = i_shdr->sh_offset + asec->output_offset; |
| 957 | size = asec->size; |
| 958 | return (bfd_seek (abfd, position, SEEK_SET) == 0 |
| 959 | && bfd_bwrite (contents, size, abfd) == size); |
| 960 | } |
| 961 | |
| 962 | /* Make .note.gnu.build-id section, and set up elf_tdata->build_id. */ |
| 963 | |
| 964 | static bfd_boolean |
| 965 | setup_build_id (bfd *ibfd) |
| 966 | { |
| 967 | asection *s; |
| 968 | bfd_size_type size; |
| 969 | flagword flags; |
| 970 | |
| 971 | size = id_note_section_size (ibfd); |
| 972 | if (size == 0) |
| 973 | { |
| 974 | einfo ("%P: warning: unrecognized --build-id style ignored.\n"); |
| 975 | return FALSE; |
| 976 | } |
| 977 | |
| 978 | flags = (SEC_ALLOC | SEC_LOAD | SEC_IN_MEMORY |
| 979 | | SEC_LINKER_CREATED | SEC_READONLY | SEC_DATA); |
| 980 | s = bfd_make_section_with_flags (ibfd, ".note.gnu.build-id", flags); |
| 981 | if (s != NULL && bfd_set_section_alignment (ibfd, s, 2)) |
| 982 | { |
| 983 | struct elf_obj_tdata *t = elf_tdata (link_info.output_bfd); |
| 984 | t->o->build_id.after_write_object_contents = &write_build_id; |
| 985 | t->o->build_id.style = emit_note_gnu_build_id; |
| 986 | t->o->build_id.sec = s; |
| 987 | elf_section_type (s) = SHT_NOTE; |
| 988 | s->size = size; |
| 989 | return TRUE; |
| 990 | } |
| 991 | |
| 992 | einfo ("%P: warning: Cannot create .note.gnu.build-id section," |
| 993 | " --build-id ignored.\n"); |
| 994 | return FALSE; |
| 995 | } |
| 996 | |
| 997 | /* This is called after all the input files have been opened. */ |
| 998 | |
| 999 | static void |
| 1000 | gld${EMULATION_NAME}_after_open (void) |
| 1001 | { |
| 1002 | struct bfd_link_needed_list *needed, *l; |
| 1003 | struct elf_link_hash_table *htab; |
| 1004 | |
| 1005 | after_open_default (); |
| 1006 | |
| 1007 | htab = elf_hash_table (&link_info); |
| 1008 | if (!is_elf_hash_table (htab)) |
| 1009 | return; |
| 1010 | |
| 1011 | if (emit_note_gnu_build_id != NULL) |
| 1012 | { |
| 1013 | bfd *abfd; |
| 1014 | |
| 1015 | /* Find an ELF input. */ |
| 1016 | for (abfd = link_info.input_bfds; |
| 1017 | abfd != (bfd *) NULL; abfd = abfd->link.next) |
| 1018 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour) |
| 1019 | break; |
| 1020 | |
| 1021 | /* PR 10555: If there are no ELF input files do not try to |
| 1022 | create a .note.gnu-build-id section. */ |
| 1023 | if (abfd == NULL |
| 1024 | || !setup_build_id (abfd)) |
| 1025 | { |
| 1026 | free ((char *) emit_note_gnu_build_id); |
| 1027 | emit_note_gnu_build_id = NULL; |
| 1028 | } |
| 1029 | } |
| 1030 | |
| 1031 | if (link_info.relocatable) |
| 1032 | { |
| 1033 | if (link_info.execstack == ! link_info.noexecstack) |
| 1034 | /* PR ld/16744: If "-z [no]execstack" has been specified on the |
| 1035 | command line and we are perfoming a relocatable link then no |
| 1036 | PT_GNU_STACK segment will be created and so the |
| 1037 | linkinfo.[no]execstack values set in _handle_option() will have no |
| 1038 | effect. Instead we create a .note.GNU-stack section in much the |
| 1039 | same way as the assembler does with its --[no]execstack option. */ |
| 1040 | (void) bfd_make_section_with_flags (link_info.input_bfds, |
| 1041 | ".note.GNU-stack", |
| 1042 | SEC_READONLY | (link_info.execstack ? SEC_CODE : 0)); |
| 1043 | |
| 1044 | return; |
| 1045 | } |
| 1046 | |
| 1047 | if (link_info.eh_frame_hdr |
| 1048 | && !link_info.traditional_format) |
| 1049 | { |
| 1050 | bfd *abfd, *elfbfd = NULL; |
| 1051 | bfd_boolean warn_eh_frame = FALSE; |
| 1052 | asection *s; |
| 1053 | |
| 1054 | for (abfd = link_info.input_bfds; abfd; abfd = abfd->link.next) |
| 1055 | { |
| 1056 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour) |
| 1057 | elfbfd = abfd; |
| 1058 | if (!warn_eh_frame) |
| 1059 | { |
| 1060 | s = bfd_get_section_by_name (abfd, ".eh_frame"); |
| 1061 | while (s != NULL |
| 1062 | && (s->size <= 8 |
| 1063 | || bfd_is_abs_section (s->output_section))) |
| 1064 | s = bfd_get_next_section_by_name (s); |
| 1065 | warn_eh_frame = s != NULL; |
| 1066 | } |
| 1067 | if (elfbfd && warn_eh_frame) |
| 1068 | break; |
| 1069 | } |
| 1070 | if (elfbfd) |
| 1071 | { |
| 1072 | const struct elf_backend_data *bed; |
| 1073 | |
| 1074 | bed = get_elf_backend_data (elfbfd); |
| 1075 | s = bfd_make_section_with_flags (elfbfd, ".eh_frame_hdr", |
| 1076 | bed->dynamic_sec_flags |
| 1077 | | SEC_READONLY); |
| 1078 | if (s != NULL |
| 1079 | && bfd_set_section_alignment (elfbfd, s, 2)) |
| 1080 | { |
| 1081 | htab->eh_info.hdr_sec = s; |
| 1082 | warn_eh_frame = FALSE; |
| 1083 | } |
| 1084 | } |
| 1085 | if (warn_eh_frame) |
| 1086 | einfo ("%P: warning: Cannot create .eh_frame_hdr section," |
| 1087 | " --eh-frame-hdr ignored.\n"); |
| 1088 | } |
| 1089 | |
| 1090 | /* Get the list of files which appear in DT_NEEDED entries in |
| 1091 | dynamic objects included in the link (often there will be none). |
| 1092 | For each such file, we want to track down the corresponding |
| 1093 | library, and include the symbol table in the link. This is what |
| 1094 | the runtime dynamic linker will do. Tracking the files down here |
| 1095 | permits one dynamic object to include another without requiring |
| 1096 | special action by the person doing the link. Note that the |
| 1097 | needed list can actually grow while we are stepping through this |
| 1098 | loop. */ |
| 1099 | needed = bfd_elf_get_needed_list (link_info.output_bfd, &link_info); |
| 1100 | for (l = needed; l != NULL; l = l->next) |
| 1101 | { |
| 1102 | struct bfd_link_needed_list *ll; |
| 1103 | struct dt_needed n, nn; |
| 1104 | int force; |
| 1105 | |
| 1106 | /* If the lib that needs this one was --as-needed and wasn't |
| 1107 | found to be needed, then this lib isn't needed either. */ |
| 1108 | if (l->by != NULL |
| 1109 | && (bfd_elf_get_dyn_lib_class (l->by) & DYN_AS_NEEDED) != 0) |
| 1110 | continue; |
| 1111 | |
| 1112 | /* Skip the lib if --no-copy-dt-needed-entries and |
| 1113 | --allow-shlib-undefined is in effect. */ |
| 1114 | if (l->by != NULL |
| 1115 | && link_info.unresolved_syms_in_shared_libs == RM_IGNORE |
| 1116 | && (bfd_elf_get_dyn_lib_class (l->by) & DYN_NO_ADD_NEEDED) != 0) |
| 1117 | continue; |
| 1118 | |
| 1119 | /* If we've already seen this file, skip it. */ |
| 1120 | for (ll = needed; ll != l; ll = ll->next) |
| 1121 | if ((ll->by == NULL |
| 1122 | || (bfd_elf_get_dyn_lib_class (ll->by) & DYN_AS_NEEDED) == 0) |
| 1123 | && strcmp (ll->name, l->name) == 0) |
| 1124 | break; |
| 1125 | if (ll != l) |
| 1126 | continue; |
| 1127 | |
| 1128 | /* See if this file was included in the link explicitly. */ |
| 1129 | global_needed = l; |
| 1130 | global_found = NULL; |
| 1131 | lang_for_each_input_file (gld${EMULATION_NAME}_check_needed); |
| 1132 | if (global_found != NULL |
| 1133 | && (bfd_elf_get_dyn_lib_class (global_found->the_bfd) |
| 1134 | & DYN_AS_NEEDED) == 0) |
| 1135 | continue; |
| 1136 | |
| 1137 | n.by = l->by; |
| 1138 | n.name = l->name; |
| 1139 | nn.by = l->by; |
| 1140 | if (verbose) |
| 1141 | info_msg (_("%s needed by %B\n"), l->name, l->by); |
| 1142 | |
| 1143 | /* As-needed libs specified on the command line (or linker script) |
| 1144 | take priority over libs found in search dirs. */ |
| 1145 | if (global_found != NULL) |
| 1146 | { |
| 1147 | nn.name = global_found->filename; |
| 1148 | if (gld${EMULATION_NAME}_try_needed (&nn, TRUE)) |
| 1149 | continue; |
| 1150 | } |
| 1151 | |
| 1152 | /* We need to find this file and include the symbol table. We |
| 1153 | want to search for the file in the same way that the dynamic |
| 1154 | linker will search. That means that we want to use |
| 1155 | rpath_link, rpath, then the environment variable |
| 1156 | LD_LIBRARY_PATH (native only), then the DT_RPATH/DT_RUNPATH |
| 1157 | entries (native only), then the linker script LIB_SEARCH_DIRS. |
| 1158 | We do not search using the -L arguments. |
| 1159 | |
| 1160 | We search twice. The first time, we skip objects which may |
| 1161 | introduce version mismatches. The second time, we force |
| 1162 | their use. See gld${EMULATION_NAME}_vercheck comment. */ |
| 1163 | for (force = 0; force < 2; force++) |
| 1164 | { |
| 1165 | size_t len; |
| 1166 | search_dirs_type *search; |
| 1167 | EOF |
| 1168 | if [ "x${NATIVE}" = xyes ] ; then |
| 1169 | fragment <<EOF |
| 1170 | const char *lib_path; |
| 1171 | EOF |
| 1172 | fi |
| 1173 | if [ "x${USE_LIBPATH}" = xyes ] ; then |
| 1174 | fragment <<EOF |
| 1175 | struct bfd_link_needed_list *rp; |
| 1176 | int found; |
| 1177 | EOF |
| 1178 | fi |
| 1179 | fragment <<EOF |
| 1180 | |
| 1181 | if (gld${EMULATION_NAME}_search_needed (command_line.rpath_link, |
| 1182 | &n, force)) |
| 1183 | break; |
| 1184 | EOF |
| 1185 | if [ "x${USE_LIBPATH}" = xyes ] ; then |
| 1186 | fragment <<EOF |
| 1187 | if (gld${EMULATION_NAME}_search_needed (command_line.rpath, |
| 1188 | &n, force)) |
| 1189 | break; |
| 1190 | EOF |
| 1191 | fi |
| 1192 | if [ "x${NATIVE}" = xyes ] ; then |
| 1193 | fragment <<EOF |
| 1194 | if (command_line.rpath_link == NULL |
| 1195 | && command_line.rpath == NULL) |
| 1196 | { |
| 1197 | lib_path = (const char *) getenv ("LD_RUN_PATH"); |
| 1198 | if (gld${EMULATION_NAME}_search_needed (lib_path, &n, |
| 1199 | force)) |
| 1200 | break; |
| 1201 | } |
| 1202 | lib_path = (const char *) getenv ("LD_LIBRARY_PATH"); |
| 1203 | if (gld${EMULATION_NAME}_search_needed (lib_path, &n, force)) |
| 1204 | break; |
| 1205 | EOF |
| 1206 | fi |
| 1207 | if [ "x${USE_LIBPATH}" = xyes ] ; then |
| 1208 | fragment <<EOF |
| 1209 | found = 0; |
| 1210 | rp = bfd_elf_get_runpath_list (link_info.output_bfd, &link_info); |
| 1211 | for (; !found && rp != NULL; rp = rp->next) |
| 1212 | { |
| 1213 | char *tmpname = gld${EMULATION_NAME}_add_sysroot (rp->name); |
| 1214 | found = (rp->by == l->by |
| 1215 | && gld${EMULATION_NAME}_search_needed (tmpname, |
| 1216 | &n, |
| 1217 | force)); |
| 1218 | free (tmpname); |
| 1219 | } |
| 1220 | if (found) |
| 1221 | break; |
| 1222 | |
| 1223 | EOF |
| 1224 | fi |
| 1225 | if [ "x${USE_LIBPATH}" = xyes ] ; then |
| 1226 | case ${target} in |
| 1227 | *-*-freebsd* | *-*-dragonfly*) |
| 1228 | fragment <<EOF |
| 1229 | if (gld${EMULATION_NAME}_check_ld_elf_hints (l, force)) |
| 1230 | break; |
| 1231 | EOF |
| 1232 | # FreeBSD |
| 1233 | ;; |
| 1234 | |
| 1235 | *-*-linux-* | *-*-k*bsd*-* | *-*-gnu*) |
| 1236 | fragment <<EOF |
| 1237 | if (gld${EMULATION_NAME}_check_ld_so_conf (l, force)) |
| 1238 | break; |
| 1239 | |
| 1240 | EOF |
| 1241 | # Linux |
| 1242 | ;; |
| 1243 | esac |
| 1244 | fi |
| 1245 | fragment <<EOF |
| 1246 | len = strlen (l->name); |
| 1247 | for (search = search_head; search != NULL; search = search->next) |
| 1248 | { |
| 1249 | char *filename; |
| 1250 | |
| 1251 | if (search->cmdline) |
| 1252 | continue; |
| 1253 | filename = (char *) xmalloc (strlen (search->name) + len + 2); |
| 1254 | sprintf (filename, "%s/%s", search->name, l->name); |
| 1255 | nn.name = filename; |
| 1256 | if (gld${EMULATION_NAME}_try_needed (&nn, force)) |
| 1257 | break; |
| 1258 | free (filename); |
| 1259 | } |
| 1260 | if (search != NULL) |
| 1261 | break; |
| 1262 | EOF |
| 1263 | fragment <<EOF |
| 1264 | } |
| 1265 | |
| 1266 | if (force < 2) |
| 1267 | continue; |
| 1268 | |
| 1269 | einfo ("%P: warning: %s, needed by %B, not found (try using -rpath or -rpath-link)\n", |
| 1270 | l->name, l->by); |
| 1271 | } |
| 1272 | } |
| 1273 | |
| 1274 | EOF |
| 1275 | fi |
| 1276 | |
| 1277 | fragment <<EOF |
| 1278 | |
| 1279 | /* Look through an expression for an assignment statement. */ |
| 1280 | |
| 1281 | static void |
| 1282 | gld${EMULATION_NAME}_find_exp_assignment (etree_type *exp) |
| 1283 | { |
| 1284 | bfd_boolean provide = FALSE; |
| 1285 | |
| 1286 | switch (exp->type.node_class) |
| 1287 | { |
| 1288 | case etree_provide: |
| 1289 | case etree_provided: |
| 1290 | provide = TRUE; |
| 1291 | /* Fall thru */ |
| 1292 | case etree_assign: |
| 1293 | /* We call record_link_assignment even if the symbol is defined. |
| 1294 | This is because if it is defined by a dynamic object, we |
| 1295 | actually want to use the value defined by the linker script, |
| 1296 | not the value from the dynamic object (because we are setting |
| 1297 | symbols like etext). If the symbol is defined by a regular |
| 1298 | object, then, as it happens, calling record_link_assignment |
| 1299 | will do no harm. */ |
| 1300 | if (strcmp (exp->assign.dst, ".") != 0) |
| 1301 | { |
| 1302 | if (!bfd_elf_record_link_assignment (link_info.output_bfd, |
| 1303 | &link_info, |
| 1304 | exp->assign.dst, provide, |
| 1305 | exp->assign.hidden)) |
| 1306 | einfo ("%P%F: failed to record assignment to %s: %E\n", |
| 1307 | exp->assign.dst); |
| 1308 | } |
| 1309 | gld${EMULATION_NAME}_find_exp_assignment (exp->assign.src); |
| 1310 | break; |
| 1311 | |
| 1312 | case etree_binary: |
| 1313 | gld${EMULATION_NAME}_find_exp_assignment (exp->binary.lhs); |
| 1314 | gld${EMULATION_NAME}_find_exp_assignment (exp->binary.rhs); |
| 1315 | break; |
| 1316 | |
| 1317 | case etree_trinary: |
| 1318 | gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.cond); |
| 1319 | gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.lhs); |
| 1320 | gld${EMULATION_NAME}_find_exp_assignment (exp->trinary.rhs); |
| 1321 | break; |
| 1322 | |
| 1323 | case etree_unary: |
| 1324 | gld${EMULATION_NAME}_find_exp_assignment (exp->unary.child); |
| 1325 | break; |
| 1326 | |
| 1327 | default: |
| 1328 | break; |
| 1329 | } |
| 1330 | } |
| 1331 | |
| 1332 | |
| 1333 | /* This is called by the before_allocation routine via |
| 1334 | lang_for_each_statement. It locates any assignment statements, and |
| 1335 | tells the ELF backend about them, in case they are assignments to |
| 1336 | symbols which are referred to by dynamic objects. */ |
| 1337 | |
| 1338 | static void |
| 1339 | gld${EMULATION_NAME}_find_statement_assignment (lang_statement_union_type *s) |
| 1340 | { |
| 1341 | if (s->header.type == lang_assignment_statement_enum) |
| 1342 | gld${EMULATION_NAME}_find_exp_assignment (s->assignment_statement.exp); |
| 1343 | } |
| 1344 | |
| 1345 | EOF |
| 1346 | |
| 1347 | if test x"$LDEMUL_BEFORE_ALLOCATION" != xgld"$EMULATION_NAME"_before_allocation; then |
| 1348 | if test x"${ELF_INTERPRETER_NAME+set}" = xset; then |
| 1349 | ELF_INTERPRETER_SET_DEFAULT=" |
| 1350 | if (sinterp != NULL) |
| 1351 | { |
| 1352 | sinterp->contents = (unsigned char *) ${ELF_INTERPRETER_NAME}; |
| 1353 | sinterp->size = strlen ((char *) sinterp->contents) + 1; |
| 1354 | } |
| 1355 | |
| 1356 | " |
| 1357 | else |
| 1358 | ELF_INTERPRETER_SET_DEFAULT= |
| 1359 | fi |
| 1360 | fragment <<EOF |
| 1361 | |
| 1362 | /* used by before_allocation and handle_option. */ |
| 1363 | static void |
| 1364 | gld${EMULATION_NAME}_append_to_separated_string (char **to, char *op_arg) |
| 1365 | { |
| 1366 | if (*to == NULL) |
| 1367 | *to = xstrdup (op_arg); |
| 1368 | else |
| 1369 | { |
| 1370 | size_t to_len = strlen (*to); |
| 1371 | size_t op_arg_len = strlen (op_arg); |
| 1372 | char *buf; |
| 1373 | char *cp = *to; |
| 1374 | |
| 1375 | /* First see whether OPTARG is already in the path. */ |
| 1376 | do |
| 1377 | { |
| 1378 | if (strncmp (op_arg, cp, op_arg_len) == 0 |
| 1379 | && (cp[op_arg_len] == 0 |
| 1380 | || cp[op_arg_len] == config.rpath_separator)) |
| 1381 | /* We found it. */ |
| 1382 | break; |
| 1383 | |
| 1384 | /* Not yet found. */ |
| 1385 | cp = strchr (cp, config.rpath_separator); |
| 1386 | if (cp != NULL) |
| 1387 | ++cp; |
| 1388 | } |
| 1389 | while (cp != NULL); |
| 1390 | |
| 1391 | if (cp == NULL) |
| 1392 | { |
| 1393 | buf = xmalloc (to_len + op_arg_len + 2); |
| 1394 | sprintf (buf, "%s%c%s", *to, |
| 1395 | config.rpath_separator, op_arg); |
| 1396 | free (*to); |
| 1397 | *to = buf; |
| 1398 | } |
| 1399 | } |
| 1400 | } |
| 1401 | |
| 1402 | /* This is called after the sections have been attached to output |
| 1403 | sections, but before any sizes or addresses have been set. */ |
| 1404 | |
| 1405 | static void |
| 1406 | gld${EMULATION_NAME}_before_allocation (void) |
| 1407 | { |
| 1408 | const char *rpath; |
| 1409 | asection *sinterp; |
| 1410 | bfd *abfd; |
| 1411 | struct elf_link_hash_entry *ehdr_start = NULL; |
| 1412 | struct bfd_link_hash_entry ehdr_start_save = ehdr_start_save; |
| 1413 | |
| 1414 | if (is_elf_hash_table (link_info.hash)) |
| 1415 | { |
| 1416 | _bfd_elf_tls_setup (link_info.output_bfd, &link_info); |
| 1417 | |
| 1418 | /* Make __ehdr_start hidden if it has been referenced, to |
| 1419 | prevent the symbol from being dynamic. */ |
| 1420 | if (!link_info.relocatable) |
| 1421 | { |
| 1422 | struct elf_link_hash_entry *h |
| 1423 | = elf_link_hash_lookup (elf_hash_table (&link_info), "__ehdr_start", |
| 1424 | FALSE, FALSE, TRUE); |
| 1425 | |
| 1426 | /* Only adjust the export class if the symbol was referenced |
| 1427 | and not defined, otherwise leave it alone. */ |
| 1428 | if (h != NULL |
| 1429 | && (h->root.type == bfd_link_hash_new |
| 1430 | || h->root.type == bfd_link_hash_undefined |
| 1431 | || h->root.type == bfd_link_hash_undefweak |
| 1432 | || h->root.type == bfd_link_hash_common)) |
| 1433 | { |
| 1434 | _bfd_elf_link_hash_hide_symbol (&link_info, h, TRUE); |
| 1435 | if (ELF_ST_VISIBILITY (h->other) != STV_INTERNAL) |
| 1436 | h->other = (h->other & ~ELF_ST_VISIBILITY (-1)) | STV_HIDDEN; |
| 1437 | /* Don't leave the symbol undefined. Undefined hidden |
| 1438 | symbols typically won't have dynamic relocations, but |
| 1439 | we most likely will need dynamic relocations for |
| 1440 | __ehdr_start if we are building a PIE or shared |
| 1441 | library. */ |
| 1442 | ehdr_start = h; |
| 1443 | ehdr_start_save = h->root; |
| 1444 | h->root.type = bfd_link_hash_defined; |
| 1445 | h->root.u.def.section = bfd_abs_section_ptr; |
| 1446 | h->root.u.def.value = 0; |
| 1447 | } |
| 1448 | } |
| 1449 | |
| 1450 | /* If we are going to make any variable assignments, we need to |
| 1451 | let the ELF backend know about them in case the variables are |
| 1452 | referred to by dynamic objects. */ |
| 1453 | lang_for_each_statement (gld${EMULATION_NAME}_find_statement_assignment); |
| 1454 | } |
| 1455 | |
| 1456 | /* Let the ELF backend work out the sizes of any sections required |
| 1457 | by dynamic linking. */ |
| 1458 | rpath = command_line.rpath; |
| 1459 | if (rpath == NULL) |
| 1460 | rpath = (const char *) getenv ("LD_RUN_PATH"); |
| 1461 | |
| 1462 | for (abfd = link_info.input_bfds; abfd; abfd = abfd->link.next) |
| 1463 | if (bfd_get_flavour (abfd) == bfd_target_elf_flavour) |
| 1464 | { |
| 1465 | const char *audit_libs = elf_dt_audit (abfd); |
| 1466 | |
| 1467 | /* If the input bfd contains an audit entry, we need to add it as |
| 1468 | a dep audit entry. */ |
| 1469 | if (audit_libs && *audit_libs != '\0') |
| 1470 | { |
| 1471 | char *cp = xstrdup (audit_libs); |
| 1472 | do |
| 1473 | { |
| 1474 | int more = 0; |
| 1475 | char *cp2 = strchr (cp, config.rpath_separator); |
| 1476 | |
| 1477 | if (cp2) |
| 1478 | { |
| 1479 | *cp2 = '\0'; |
| 1480 | more = 1; |
| 1481 | } |
| 1482 | |
| 1483 | if (cp != NULL && *cp != '\0') |
| 1484 | gld${EMULATION_NAME}_append_to_separated_string (&depaudit, cp); |
| 1485 | |
| 1486 | cp = more ? ++cp2 : NULL; |
| 1487 | } |
| 1488 | while (cp != NULL); |
| 1489 | } |
| 1490 | } |
| 1491 | |
| 1492 | if (! (bfd_elf_size_dynamic_sections |
| 1493 | (link_info.output_bfd, command_line.soname, rpath, |
| 1494 | command_line.filter_shlib, audit, depaudit, |
| 1495 | (const char * const *) command_line.auxiliary_filters, |
| 1496 | &link_info, &sinterp))) |
| 1497 | einfo ("%P%F: failed to set dynamic section sizes: %E\n"); |
| 1498 | |
| 1499 | ${ELF_INTERPRETER_SET_DEFAULT} |
| 1500 | /* Let the user override the dynamic linker we are using. */ |
| 1501 | if (command_line.interpreter != NULL |
| 1502 | && sinterp != NULL) |
| 1503 | { |
| 1504 | sinterp->contents = (bfd_byte *) command_line.interpreter; |
| 1505 | sinterp->size = strlen (command_line.interpreter) + 1; |
| 1506 | } |
| 1507 | |
| 1508 | /* Look for any sections named .gnu.warning. As a GNU extensions, |
| 1509 | we treat such sections as containing warning messages. We print |
| 1510 | out the warning message, and then zero out the section size so |
| 1511 | that it does not get copied into the output file. */ |
| 1512 | |
| 1513 | { |
| 1514 | LANG_FOR_EACH_INPUT_STATEMENT (is) |
| 1515 | { |
| 1516 | asection *s; |
| 1517 | bfd_size_type sz; |
| 1518 | char *msg; |
| 1519 | bfd_boolean ret; |
| 1520 | |
| 1521 | if (is->flags.just_syms) |
| 1522 | continue; |
| 1523 | |
| 1524 | s = bfd_get_section_by_name (is->the_bfd, ".gnu.warning"); |
| 1525 | if (s == NULL) |
| 1526 | continue; |
| 1527 | |
| 1528 | sz = s->size; |
| 1529 | msg = (char *) xmalloc ((size_t) (sz + 1)); |
| 1530 | if (! bfd_get_section_contents (is->the_bfd, s, msg, |
| 1531 | (file_ptr) 0, sz)) |
| 1532 | einfo ("%F%B: Can't read contents of section .gnu.warning: %E\n", |
| 1533 | is->the_bfd); |
| 1534 | msg[sz] = '\0'; |
| 1535 | ret = link_info.callbacks->warning (&link_info, msg, |
| 1536 | (const char *) NULL, |
| 1537 | is->the_bfd, (asection *) NULL, |
| 1538 | (bfd_vma) 0); |
| 1539 | ASSERT (ret); |
| 1540 | free (msg); |
| 1541 | |
| 1542 | /* Clobber the section size, so that we don't waste space |
| 1543 | copying the warning into the output file. If we've already |
| 1544 | sized the output section, adjust its size. The adjustment |
| 1545 | is on rawsize because targets that size sections early will |
| 1546 | have called lang_reset_memory_regions after sizing. */ |
| 1547 | if (s->output_section != NULL |
| 1548 | && s->output_section->rawsize >= s->size) |
| 1549 | s->output_section->rawsize -= s->size; |
| 1550 | |
| 1551 | s->size = 0; |
| 1552 | |
| 1553 | /* Also set SEC_EXCLUDE, so that local symbols defined in the |
| 1554 | warning section don't get copied to the output. */ |
| 1555 | s->flags |= SEC_EXCLUDE | SEC_KEEP; |
| 1556 | } |
| 1557 | } |
| 1558 | |
| 1559 | before_allocation_default (); |
| 1560 | |
| 1561 | if (!bfd_elf_size_dynsym_hash_dynstr (link_info.output_bfd, &link_info)) |
| 1562 | einfo ("%P%F: failed to set dynamic section sizes: %E\n"); |
| 1563 | |
| 1564 | if (ehdr_start != NULL) |
| 1565 | { |
| 1566 | /* If we twiddled __ehdr_start to defined earlier, put it back |
| 1567 | as it was. */ |
| 1568 | ehdr_start->root.type = ehdr_start_save.type; |
| 1569 | ehdr_start->root.u = ehdr_start_save.u; |
| 1570 | } |
| 1571 | } |
| 1572 | |
| 1573 | EOF |
| 1574 | fi |
| 1575 | |
| 1576 | if test x"$LDEMUL_OPEN_DYNAMIC_ARCHIVE" != xgld"$EMULATION_NAME"_open_dynamic_archive; then |
| 1577 | fragment <<EOF |
| 1578 | |
| 1579 | /* Try to open a dynamic archive. This is where we know that ELF |
| 1580 | dynamic libraries have an extension of .so (or .sl on oddball systems |
| 1581 | like hpux). */ |
| 1582 | |
| 1583 | static bfd_boolean |
| 1584 | gld${EMULATION_NAME}_open_dynamic_archive |
| 1585 | (const char *arch, search_dirs_type *search, lang_input_statement_type *entry) |
| 1586 | { |
| 1587 | const char *filename; |
| 1588 | char *string; |
| 1589 | size_t len; |
| 1590 | bfd_boolean opened = FALSE; |
| 1591 | |
| 1592 | if (! entry->flags.maybe_archive) |
| 1593 | return FALSE; |
| 1594 | |
| 1595 | filename = entry->filename; |
| 1596 | len = strlen (search->name) + strlen (filename); |
| 1597 | if (entry->flags.full_name_provided) |
| 1598 | { |
| 1599 | len += sizeof "/"; |
| 1600 | string = (char *) xmalloc (len); |
| 1601 | sprintf (string, "%s/%s", search->name, filename); |
| 1602 | } |
| 1603 | else |
| 1604 | { |
| 1605 | size_t xlen = 0; |
| 1606 | |
| 1607 | len += strlen (arch) + sizeof "/lib.so"; |
| 1608 | #ifdef EXTRA_SHLIB_EXTENSION |
| 1609 | xlen = (strlen (EXTRA_SHLIB_EXTENSION) > 3 |
| 1610 | ? strlen (EXTRA_SHLIB_EXTENSION) - 3 |
| 1611 | : 0); |
| 1612 | #endif |
| 1613 | string = (char *) xmalloc (len + xlen); |
| 1614 | sprintf (string, "%s/lib%s%s.so", search->name, filename, arch); |
| 1615 | #ifdef EXTRA_SHLIB_EXTENSION |
| 1616 | /* Try the .so extension first. If that fails build a new filename |
| 1617 | using EXTRA_SHLIB_EXTENSION. */ |
| 1618 | opened = ldfile_try_open_bfd (string, entry); |
| 1619 | if (!opened) |
| 1620 | strcpy (string + len - 4, EXTRA_SHLIB_EXTENSION); |
| 1621 | #endif |
| 1622 | } |
| 1623 | |
| 1624 | if (!opened && !ldfile_try_open_bfd (string, entry)) |
| 1625 | { |
| 1626 | free (string); |
| 1627 | return FALSE; |
| 1628 | } |
| 1629 | |
| 1630 | entry->filename = string; |
| 1631 | |
| 1632 | /* We have found a dynamic object to include in the link. The ELF |
| 1633 | backend linker will create a DT_NEEDED entry in the .dynamic |
| 1634 | section naming this file. If this file includes a DT_SONAME |
| 1635 | entry, it will be used. Otherwise, the ELF linker will just use |
| 1636 | the name of the file. For an archive found by searching, like |
| 1637 | this one, the DT_NEEDED entry should consist of just the name of |
| 1638 | the file, without the path information used to find it. Note |
| 1639 | that we only need to do this if we have a dynamic object; an |
| 1640 | archive will never be referenced by a DT_NEEDED entry. |
| 1641 | |
| 1642 | FIXME: This approach--using bfd_elf_set_dt_needed_name--is not |
| 1643 | very pretty. I haven't been able to think of anything that is |
| 1644 | pretty, though. */ |
| 1645 | if (bfd_check_format (entry->the_bfd, bfd_object) |
| 1646 | && (entry->the_bfd->flags & DYNAMIC) != 0) |
| 1647 | { |
| 1648 | ASSERT (entry->flags.maybe_archive && entry->flags.search_dirs); |
| 1649 | |
| 1650 | /* Rather than duplicating the logic above. Just use the |
| 1651 | filename we recorded earlier. */ |
| 1652 | |
| 1653 | if (!entry->flags.full_name_provided) |
| 1654 | filename = lbasename (entry->filename); |
| 1655 | bfd_elf_set_dt_needed_name (entry->the_bfd, filename); |
| 1656 | } |
| 1657 | |
| 1658 | return TRUE; |
| 1659 | } |
| 1660 | |
| 1661 | EOF |
| 1662 | fi |
| 1663 | |
| 1664 | if test x"$LDEMUL_PLACE_ORPHAN" != xgld"$EMULATION_NAME"_place_orphan; then |
| 1665 | fragment <<EOF |
| 1666 | |
| 1667 | /* A variant of lang_output_section_find used by place_orphan. */ |
| 1668 | |
| 1669 | static lang_output_section_statement_type * |
| 1670 | output_rel_find (asection *sec, int isdyn) |
| 1671 | { |
| 1672 | lang_output_section_statement_type *lookup; |
| 1673 | lang_output_section_statement_type *last = NULL; |
| 1674 | lang_output_section_statement_type *last_alloc = NULL; |
| 1675 | lang_output_section_statement_type *last_ro_alloc = NULL; |
| 1676 | lang_output_section_statement_type *last_rel = NULL; |
| 1677 | lang_output_section_statement_type *last_rel_alloc = NULL; |
| 1678 | int rela = sec->name[4] == 'a'; |
| 1679 | |
| 1680 | for (lookup = &lang_output_section_statement.head->output_section_statement; |
| 1681 | lookup != NULL; |
| 1682 | lookup = lookup->next) |
| 1683 | { |
| 1684 | if (lookup->constraint >= 0 |
| 1685 | && CONST_STRNEQ (lookup->name, ".rel")) |
| 1686 | { |
| 1687 | int lookrela = lookup->name[4] == 'a'; |
| 1688 | |
| 1689 | /* .rel.dyn must come before all other reloc sections, to suit |
| 1690 | GNU ld.so. */ |
| 1691 | if (isdyn) |
| 1692 | break; |
| 1693 | |
| 1694 | /* Don't place after .rel.plt as doing so results in wrong |
| 1695 | dynamic tags. */ |
| 1696 | if (strcmp (".plt", lookup->name + 4 + lookrela) == 0) |
| 1697 | break; |
| 1698 | |
| 1699 | if (rela == lookrela || last_rel == NULL) |
| 1700 | last_rel = lookup; |
| 1701 | if ((rela == lookrela || last_rel_alloc == NULL) |
| 1702 | && lookup->bfd_section != NULL |
| 1703 | && (lookup->bfd_section->flags & SEC_ALLOC) != 0) |
| 1704 | last_rel_alloc = lookup; |
| 1705 | } |
| 1706 | |
| 1707 | last = lookup; |
| 1708 | if (lookup->bfd_section != NULL |
| 1709 | && (lookup->bfd_section->flags & SEC_ALLOC) != 0) |
| 1710 | { |
| 1711 | last_alloc = lookup; |
| 1712 | if ((lookup->bfd_section->flags & SEC_READONLY) != 0) |
| 1713 | last_ro_alloc = lookup; |
| 1714 | } |
| 1715 | } |
| 1716 | |
| 1717 | if (last_rel_alloc) |
| 1718 | return last_rel_alloc; |
| 1719 | |
| 1720 | if (last_rel) |
| 1721 | return last_rel; |
| 1722 | |
| 1723 | if (last_ro_alloc) |
| 1724 | return last_ro_alloc; |
| 1725 | |
| 1726 | if (last_alloc) |
| 1727 | return last_alloc; |
| 1728 | |
| 1729 | return last; |
| 1730 | } |
| 1731 | |
| 1732 | /* Place an orphan section. We use this to put random SHF_ALLOC |
| 1733 | sections in the right segment. */ |
| 1734 | |
| 1735 | static lang_output_section_statement_type * |
| 1736 | gld${EMULATION_NAME}_place_orphan (asection *s, |
| 1737 | const char *secname, |
| 1738 | int constraint) |
| 1739 | { |
| 1740 | static struct orphan_save hold[] = |
| 1741 | { |
| 1742 | { ".text", |
| 1743 | SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE, |
| 1744 | 0, 0, 0, 0 }, |
| 1745 | { ".rodata", |
| 1746 | SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA, |
| 1747 | 0, 0, 0, 0 }, |
| 1748 | { ".tdata", |
| 1749 | SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_THREAD_LOCAL, |
| 1750 | 0, 0, 0, 0 }, |
| 1751 | { ".data", |
| 1752 | SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA, |
| 1753 | 0, 0, 0, 0 }, |
| 1754 | { ".bss", |
| 1755 | SEC_ALLOC, |
| 1756 | 0, 0, 0, 0 }, |
| 1757 | { 0, |
| 1758 | SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA, |
| 1759 | 0, 0, 0, 0 }, |
| 1760 | { ".interp", |
| 1761 | SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA, |
| 1762 | 0, 0, 0, 0 }, |
| 1763 | { ".sdata", |
| 1764 | SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_SMALL_DATA, |
| 1765 | 0, 0, 0, 0 }, |
| 1766 | { ".comment", |
| 1767 | SEC_HAS_CONTENTS, |
| 1768 | 0, 0, 0, 0 }, |
| 1769 | }; |
| 1770 | enum orphan_save_index |
| 1771 | { |
| 1772 | orphan_text = 0, |
| 1773 | orphan_rodata, |
| 1774 | orphan_tdata, |
| 1775 | orphan_data, |
| 1776 | orphan_bss, |
| 1777 | orphan_rel, |
| 1778 | orphan_interp, |
| 1779 | orphan_sdata, |
| 1780 | orphan_nonalloc |
| 1781 | }; |
| 1782 | static int orphan_init_done = 0; |
| 1783 | struct orphan_save *place; |
| 1784 | lang_output_section_statement_type *after; |
| 1785 | lang_output_section_statement_type *os; |
| 1786 | lang_output_section_statement_type *match_by_name = NULL; |
| 1787 | int isdyn = 0; |
| 1788 | int iself = s->owner->xvec->flavour == bfd_target_elf_flavour; |
| 1789 | unsigned int sh_type = iself ? elf_section_type (s) : SHT_NULL; |
| 1790 | |
| 1791 | if (! link_info.relocatable |
| 1792 | && link_info.combreloc |
| 1793 | && (s->flags & SEC_ALLOC)) |
| 1794 | { |
| 1795 | if (iself) |
| 1796 | switch (sh_type) |
| 1797 | { |
| 1798 | case SHT_RELA: |
| 1799 | secname = ".rela.dyn"; |
| 1800 | isdyn = 1; |
| 1801 | break; |
| 1802 | case SHT_REL: |
| 1803 | secname = ".rel.dyn"; |
| 1804 | isdyn = 1; |
| 1805 | break; |
| 1806 | default: |
| 1807 | break; |
| 1808 | } |
| 1809 | else if (CONST_STRNEQ (secname, ".rel")) |
| 1810 | { |
| 1811 | secname = secname[4] == 'a' ? ".rela.dyn" : ".rel.dyn"; |
| 1812 | isdyn = 1; |
| 1813 | } |
| 1814 | } |
| 1815 | |
| 1816 | /* Look through the script to see where to place this section. */ |
| 1817 | if (constraint == 0) |
| 1818 | for (os = lang_output_section_find (secname); |
| 1819 | os != NULL; |
| 1820 | os = next_matching_output_section_statement (os, 0)) |
| 1821 | { |
| 1822 | /* If we don't match an existing output section, tell |
| 1823 | lang_insert_orphan to create a new output section. */ |
| 1824 | constraint = SPECIAL; |
| 1825 | |
| 1826 | if (os->bfd_section != NULL |
| 1827 | && (os->bfd_section->flags == 0 |
| 1828 | || (_bfd_elf_match_sections_by_type (link_info.output_bfd, |
| 1829 | os->bfd_section, |
| 1830 | s->owner, s) |
| 1831 | && ((s->flags ^ os->bfd_section->flags) |
| 1832 | & (SEC_LOAD | SEC_ALLOC)) == 0))) |
| 1833 | { |
| 1834 | /* We already have an output section statement with this |
| 1835 | name, and its bfd section has compatible flags. |
| 1836 | If the section already exists but does not have any flags |
| 1837 | set, then it has been created by the linker, probably as a |
| 1838 | result of a --section-start command line switch. */ |
| 1839 | lang_add_section (&os->children, s, NULL, os); |
| 1840 | return os; |
| 1841 | } |
| 1842 | |
| 1843 | /* Save unused output sections in case we can match them |
| 1844 | against orphans later. */ |
| 1845 | if (os->bfd_section == NULL) |
| 1846 | match_by_name = os; |
| 1847 | } |
| 1848 | |
| 1849 | /* If we didn't match an active output section, see if we matched an |
| 1850 | unused one and use that. */ |
| 1851 | if (match_by_name) |
| 1852 | { |
| 1853 | lang_add_section (&match_by_name->children, s, NULL, match_by_name); |
| 1854 | return match_by_name; |
| 1855 | } |
| 1856 | |
| 1857 | if (!orphan_init_done) |
| 1858 | { |
| 1859 | struct orphan_save *ho; |
| 1860 | |
| 1861 | for (ho = hold; ho < hold + sizeof (hold) / sizeof (hold[0]); ++ho) |
| 1862 | if (ho->name != NULL) |
| 1863 | { |
| 1864 | ho->os = lang_output_section_find (ho->name); |
| 1865 | if (ho->os != NULL && ho->os->flags == 0) |
| 1866 | ho->os->flags = ho->flags; |
| 1867 | } |
| 1868 | orphan_init_done = 1; |
| 1869 | } |
| 1870 | |
| 1871 | /* If this is a final link, then always put .gnu.warning.SYMBOL |
| 1872 | sections into the .text section to get them out of the way. */ |
| 1873 | if (link_info.executable |
| 1874 | && ! link_info.relocatable |
| 1875 | && CONST_STRNEQ (s->name, ".gnu.warning.") |
| 1876 | && hold[orphan_text].os != NULL) |
| 1877 | { |
| 1878 | os = hold[orphan_text].os; |
| 1879 | lang_add_section (&os->children, s, NULL, os); |
| 1880 | return os; |
| 1881 | } |
| 1882 | |
| 1883 | /* Decide which segment the section should go in based on the |
| 1884 | section name and section flags. We put loadable .note sections |
| 1885 | right after the .interp section, so that the PT_NOTE segment is |
| 1886 | stored right after the program headers where the OS can read it |
| 1887 | in the first page. */ |
| 1888 | |
| 1889 | place = NULL; |
| 1890 | if ((s->flags & (SEC_ALLOC | SEC_DEBUGGING)) == 0) |
| 1891 | place = &hold[orphan_nonalloc]; |
| 1892 | else if ((s->flags & SEC_ALLOC) == 0) |
| 1893 | ; |
| 1894 | else if ((s->flags & SEC_LOAD) != 0 |
| 1895 | && ((iself && sh_type == SHT_NOTE) |
| 1896 | || (!iself && CONST_STRNEQ (secname, ".note")))) |
| 1897 | place = &hold[orphan_interp]; |
| 1898 | else if ((s->flags & (SEC_LOAD | SEC_HAS_CONTENTS | SEC_THREAD_LOCAL)) == 0) |
| 1899 | place = &hold[orphan_bss]; |
| 1900 | else if ((s->flags & SEC_SMALL_DATA) != 0) |
| 1901 | place = &hold[orphan_sdata]; |
| 1902 | else if ((s->flags & SEC_THREAD_LOCAL) != 0) |
| 1903 | place = &hold[orphan_tdata]; |
| 1904 | else if ((s->flags & SEC_READONLY) == 0) |
| 1905 | place = &hold[orphan_data]; |
| 1906 | else if (((iself && (sh_type == SHT_RELA || sh_type == SHT_REL)) |
| 1907 | || (!iself && CONST_STRNEQ (secname, ".rel"))) |
| 1908 | && (s->flags & SEC_LOAD) != 0) |
| 1909 | place = &hold[orphan_rel]; |
| 1910 | else if ((s->flags & SEC_CODE) == 0) |
| 1911 | place = &hold[orphan_rodata]; |
| 1912 | else |
| 1913 | place = &hold[orphan_text]; |
| 1914 | |
| 1915 | after = NULL; |
| 1916 | if (place != NULL) |
| 1917 | { |
| 1918 | if (place->os == NULL) |
| 1919 | { |
| 1920 | if (place->name != NULL) |
| 1921 | place->os = lang_output_section_find (place->name); |
| 1922 | else |
| 1923 | place->os = output_rel_find (s, isdyn); |
| 1924 | } |
| 1925 | after = place->os; |
| 1926 | if (after == NULL) |
| 1927 | after = lang_output_section_find_by_flags |
| 1928 | (s, &place->os, _bfd_elf_match_sections_by_type); |
| 1929 | if (after == NULL) |
| 1930 | /* *ABS* is always the first output section statement. */ |
| 1931 | after = &lang_output_section_statement.head->output_section_statement; |
| 1932 | } |
| 1933 | |
| 1934 | return lang_insert_orphan (s, secname, constraint, after, place, NULL, NULL); |
| 1935 | } |
| 1936 | EOF |
| 1937 | fi |
| 1938 | |
| 1939 | if test x"$LDEMUL_AFTER_ALLOCATION" != xgld"$EMULATION_NAME"_after_allocation; then |
| 1940 | fragment <<EOF |
| 1941 | |
| 1942 | static void |
| 1943 | gld${EMULATION_NAME}_after_allocation (void) |
| 1944 | { |
| 1945 | bfd_boolean need_layout = bfd_elf_discard_info (link_info.output_bfd, |
| 1946 | &link_info); |
| 1947 | gld${EMULATION_NAME}_map_segments (need_layout); |
| 1948 | } |
| 1949 | EOF |
| 1950 | fi |
| 1951 | |
| 1952 | if test x"$LDEMUL_GET_SCRIPT" != xgld"$EMULATION_NAME"_get_script; then |
| 1953 | fragment <<EOF |
| 1954 | |
| 1955 | static char * |
| 1956 | gld${EMULATION_NAME}_get_script (int *isfile) |
| 1957 | EOF |
| 1958 | |
| 1959 | if test x"$COMPILE_IN" = xyes |
| 1960 | then |
| 1961 | # Scripts compiled in. |
| 1962 | |
| 1963 | # sed commands to quote an ld script as a C string. |
| 1964 | sc="-f stringify.sed" |
| 1965 | |
| 1966 | fragment <<EOF |
| 1967 | { |
| 1968 | *isfile = 0; |
| 1969 | |
| 1970 | if (link_info.relocatable && config.build_constructors) |
| 1971 | return |
| 1972 | EOF |
| 1973 | sed $sc ldscripts/${EMULATION_NAME}.xu >> e${EMULATION_NAME}.c |
| 1974 | echo ' ; else if (link_info.relocatable) return' >> e${EMULATION_NAME}.c |
| 1975 | sed $sc ldscripts/${EMULATION_NAME}.xr >> e${EMULATION_NAME}.c |
| 1976 | echo ' ; else if (!config.text_read_only) return' >> e${EMULATION_NAME}.c |
| 1977 | sed $sc ldscripts/${EMULATION_NAME}.xbn >> e${EMULATION_NAME}.c |
| 1978 | if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then : ; else |
| 1979 | echo ' ; else if (!config.magic_demand_paged) return' >> e${EMULATION_NAME}.c |
| 1980 | sed $sc ldscripts/${EMULATION_NAME}.xn >> e${EMULATION_NAME}.c |
| 1981 | fi |
| 1982 | if test -n "$GENERATE_PIE_SCRIPT" ; then |
| 1983 | if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then |
| 1984 | echo ' ; else if (link_info.pie && link_info.combreloc' >> e${EMULATION_NAME}.c |
| 1985 | echo ' && link_info.relro' >> e${EMULATION_NAME}.c |
| 1986 | echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c |
| 1987 | sed $sc ldscripts/${EMULATION_NAME}.xdw >> e${EMULATION_NAME}.c |
| 1988 | echo ' ; else if (link_info.pie && link_info.combreloc) return' >> e${EMULATION_NAME}.c |
| 1989 | sed $sc ldscripts/${EMULATION_NAME}.xdc >> e${EMULATION_NAME}.c |
| 1990 | fi |
| 1991 | echo ' ; else if (link_info.pie) return' >> e${EMULATION_NAME}.c |
| 1992 | sed $sc ldscripts/${EMULATION_NAME}.xd >> e${EMULATION_NAME}.c |
| 1993 | fi |
| 1994 | if test -n "$GENERATE_SHLIB_SCRIPT" ; then |
| 1995 | if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then |
| 1996 | echo ' ; else if (link_info.shared && link_info.combreloc' >> e${EMULATION_NAME}.c |
| 1997 | echo ' && link_info.relro' >> e${EMULATION_NAME}.c |
| 1998 | echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c |
| 1999 | sed $sc ldscripts/${EMULATION_NAME}.xsw >> e${EMULATION_NAME}.c |
| 2000 | echo ' ; else if (link_info.shared && link_info.combreloc) return' >> e${EMULATION_NAME}.c |
| 2001 | sed $sc ldscripts/${EMULATION_NAME}.xsc >> e${EMULATION_NAME}.c |
| 2002 | fi |
| 2003 | echo ' ; else if (link_info.shared) return' >> e${EMULATION_NAME}.c |
| 2004 | sed $sc ldscripts/${EMULATION_NAME}.xs >> e${EMULATION_NAME}.c |
| 2005 | fi |
| 2006 | if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then |
| 2007 | echo ' ; else if (link_info.combreloc && link_info.relro' >> e${EMULATION_NAME}.c |
| 2008 | echo ' && (link_info.flags & DF_BIND_NOW)) return' >> e${EMULATION_NAME}.c |
| 2009 | sed $sc ldscripts/${EMULATION_NAME}.xw >> e${EMULATION_NAME}.c |
| 2010 | echo ' ; else if (link_info.combreloc) return' >> e${EMULATION_NAME}.c |
| 2011 | sed $sc ldscripts/${EMULATION_NAME}.xc >> e${EMULATION_NAME}.c |
| 2012 | fi |
| 2013 | echo ' ; else return' >> e${EMULATION_NAME}.c |
| 2014 | sed $sc ldscripts/${EMULATION_NAME}.x >> e${EMULATION_NAME}.c |
| 2015 | echo '; }' >> e${EMULATION_NAME}.c |
| 2016 | |
| 2017 | else |
| 2018 | # Scripts read from the filesystem. |
| 2019 | |
| 2020 | fragment <<EOF |
| 2021 | { |
| 2022 | *isfile = 1; |
| 2023 | |
| 2024 | if (link_info.relocatable && config.build_constructors) |
| 2025 | return "ldscripts/${EMULATION_NAME}.xu"; |
| 2026 | else if (link_info.relocatable) |
| 2027 | return "ldscripts/${EMULATION_NAME}.xr"; |
| 2028 | else if (!config.text_read_only) |
| 2029 | return "ldscripts/${EMULATION_NAME}.xbn"; |
| 2030 | EOF |
| 2031 | if cmp -s ldscripts/${EMULATION_NAME}.x ldscripts/${EMULATION_NAME}.xn; then : |
| 2032 | else |
| 2033 | fragment <<EOF |
| 2034 | else if (!config.magic_demand_paged) |
| 2035 | return "ldscripts/${EMULATION_NAME}.xn"; |
| 2036 | EOF |
| 2037 | fi |
| 2038 | if test -n "$GENERATE_PIE_SCRIPT" ; then |
| 2039 | if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then |
| 2040 | fragment <<EOF |
| 2041 | else if (link_info.pie && link_info.combreloc |
| 2042 | && link_info.relro && (link_info.flags & DF_BIND_NOW)) |
| 2043 | return "ldscripts/${EMULATION_NAME}.xdw"; |
| 2044 | else if (link_info.pie && link_info.combreloc) |
| 2045 | return "ldscripts/${EMULATION_NAME}.xdc"; |
| 2046 | EOF |
| 2047 | fi |
| 2048 | fragment <<EOF |
| 2049 | else if (link_info.pie) |
| 2050 | return "ldscripts/${EMULATION_NAME}.xd"; |
| 2051 | EOF |
| 2052 | fi |
| 2053 | if test -n "$GENERATE_SHLIB_SCRIPT" ; then |
| 2054 | if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then |
| 2055 | fragment <<EOF |
| 2056 | else if (link_info.shared && link_info.combreloc |
| 2057 | && link_info.relro && (link_info.flags & DF_BIND_NOW)) |
| 2058 | return "ldscripts/${EMULATION_NAME}.xsw"; |
| 2059 | else if (link_info.shared && link_info.combreloc) |
| 2060 | return "ldscripts/${EMULATION_NAME}.xsc"; |
| 2061 | EOF |
| 2062 | fi |
| 2063 | fragment <<EOF |
| 2064 | else if (link_info.shared) |
| 2065 | return "ldscripts/${EMULATION_NAME}.xs"; |
| 2066 | EOF |
| 2067 | fi |
| 2068 | if test -n "$GENERATE_COMBRELOC_SCRIPT" ; then |
| 2069 | fragment <<EOF |
| 2070 | else if (link_info.combreloc && link_info.relro |
| 2071 | && (link_info.flags & DF_BIND_NOW)) |
| 2072 | return "ldscripts/${EMULATION_NAME}.xw"; |
| 2073 | else if (link_info.combreloc) |
| 2074 | return "ldscripts/${EMULATION_NAME}.xc"; |
| 2075 | EOF |
| 2076 | fi |
| 2077 | fragment <<EOF |
| 2078 | else |
| 2079 | return "ldscripts/${EMULATION_NAME}.x"; |
| 2080 | } |
| 2081 | |
| 2082 | EOF |
| 2083 | fi |
| 2084 | fi |
| 2085 | |
| 2086 | if test -n "$PARSE_AND_LIST_PROLOGUE" ; then |
| 2087 | fragment <<EOF |
| 2088 | $PARSE_AND_LIST_PROLOGUE |
| 2089 | EOF |
| 2090 | fi |
| 2091 | |
| 2092 | fragment <<EOF |
| 2093 | |
| 2094 | #define OPTION_DISABLE_NEW_DTAGS (400) |
| 2095 | #define OPTION_ENABLE_NEW_DTAGS (OPTION_DISABLE_NEW_DTAGS + 1) |
| 2096 | #define OPTION_GROUP (OPTION_ENABLE_NEW_DTAGS + 1) |
| 2097 | #define OPTION_EH_FRAME_HDR (OPTION_GROUP + 1) |
| 2098 | #define OPTION_EXCLUDE_LIBS (OPTION_EH_FRAME_HDR + 1) |
| 2099 | #define OPTION_HASH_STYLE (OPTION_EXCLUDE_LIBS + 1) |
| 2100 | #define OPTION_BUILD_ID (OPTION_HASH_STYLE + 1) |
| 2101 | #define OPTION_AUDIT (OPTION_BUILD_ID + 1) |
| 2102 | |
| 2103 | static void |
| 2104 | gld${EMULATION_NAME}_add_options |
| 2105 | (int ns, char **shortopts, int nl, struct option **longopts, |
| 2106 | int nrl ATTRIBUTE_UNUSED, struct option **really_longopts ATTRIBUTE_UNUSED) |
| 2107 | { |
| 2108 | EOF |
| 2109 | if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then |
| 2110 | fragment <<EOF |
| 2111 | static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:P:"; |
| 2112 | EOF |
| 2113 | else |
| 2114 | fragment <<EOF |
| 2115 | static const char xtra_short[] = "${PARSE_AND_LIST_SHORTOPTS}z:"; |
| 2116 | EOF |
| 2117 | fi |
| 2118 | fragment <<EOF |
| 2119 | static const struct option xtra_long[] = { |
| 2120 | EOF |
| 2121 | if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then |
| 2122 | fragment <<EOF |
| 2123 | {"audit", required_argument, NULL, OPTION_AUDIT}, |
| 2124 | {"Bgroup", no_argument, NULL, OPTION_GROUP}, |
| 2125 | EOF |
| 2126 | fi |
| 2127 | fragment <<EOF |
| 2128 | {"build-id", optional_argument, NULL, OPTION_BUILD_ID}, |
| 2129 | EOF |
| 2130 | if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then |
| 2131 | fragment <<EOF |
| 2132 | {"depaudit", required_argument, NULL, 'P'}, |
| 2133 | {"disable-new-dtags", no_argument, NULL, OPTION_DISABLE_NEW_DTAGS}, |
| 2134 | {"enable-new-dtags", no_argument, NULL, OPTION_ENABLE_NEW_DTAGS}, |
| 2135 | {"eh-frame-hdr", no_argument, NULL, OPTION_EH_FRAME_HDR}, |
| 2136 | {"exclude-libs", required_argument, NULL, OPTION_EXCLUDE_LIBS}, |
| 2137 | {"hash-style", required_argument, NULL, OPTION_HASH_STYLE}, |
| 2138 | EOF |
| 2139 | fi |
| 2140 | if test -n "$PARSE_AND_LIST_LONGOPTS" ; then |
| 2141 | fragment <<EOF |
| 2142 | $PARSE_AND_LIST_LONGOPTS |
| 2143 | EOF |
| 2144 | fi |
| 2145 | fragment <<EOF |
| 2146 | {NULL, no_argument, NULL, 0} |
| 2147 | }; |
| 2148 | |
| 2149 | *shortopts = (char *) xrealloc (*shortopts, ns + sizeof (xtra_short)); |
| 2150 | memcpy (*shortopts + ns, &xtra_short, sizeof (xtra_short)); |
| 2151 | *longopts = (struct option *) |
| 2152 | xrealloc (*longopts, nl * sizeof (struct option) + sizeof (xtra_long)); |
| 2153 | memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long)); |
| 2154 | } |
| 2155 | |
| 2156 | #define DEFAULT_BUILD_ID_STYLE "sha1" |
| 2157 | |
| 2158 | static bfd_boolean |
| 2159 | gld${EMULATION_NAME}_handle_option (int optc) |
| 2160 | { |
| 2161 | switch (optc) |
| 2162 | { |
| 2163 | default: |
| 2164 | return FALSE; |
| 2165 | |
| 2166 | case OPTION_BUILD_ID: |
| 2167 | if (emit_note_gnu_build_id != NULL) |
| 2168 | { |
| 2169 | free ((char *) emit_note_gnu_build_id); |
| 2170 | emit_note_gnu_build_id = NULL; |
| 2171 | } |
| 2172 | if (optarg == NULL) |
| 2173 | optarg = DEFAULT_BUILD_ID_STYLE; |
| 2174 | if (strcmp (optarg, "none")) |
| 2175 | emit_note_gnu_build_id = xstrdup (optarg); |
| 2176 | break; |
| 2177 | |
| 2178 | EOF |
| 2179 | |
| 2180 | if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then |
| 2181 | fragment <<EOF |
| 2182 | case OPTION_AUDIT: |
| 2183 | gld${EMULATION_NAME}_append_to_separated_string (&audit, optarg); |
| 2184 | break; |
| 2185 | |
| 2186 | case 'P': |
| 2187 | gld${EMULATION_NAME}_append_to_separated_string (&depaudit, optarg); |
| 2188 | break; |
| 2189 | |
| 2190 | case OPTION_DISABLE_NEW_DTAGS: |
| 2191 | link_info.new_dtags = FALSE; |
| 2192 | break; |
| 2193 | |
| 2194 | case OPTION_ENABLE_NEW_DTAGS: |
| 2195 | link_info.new_dtags = TRUE; |
| 2196 | break; |
| 2197 | |
| 2198 | case OPTION_EH_FRAME_HDR: |
| 2199 | link_info.eh_frame_hdr = TRUE; |
| 2200 | break; |
| 2201 | |
| 2202 | case OPTION_GROUP: |
| 2203 | link_info.flags_1 |= (bfd_vma) DF_1_GROUP; |
| 2204 | /* Groups must be self-contained. */ |
| 2205 | link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR; |
| 2206 | link_info.unresolved_syms_in_shared_libs = RM_GENERATE_ERROR; |
| 2207 | break; |
| 2208 | |
| 2209 | case OPTION_EXCLUDE_LIBS: |
| 2210 | add_excluded_libs (optarg); |
| 2211 | break; |
| 2212 | |
| 2213 | case OPTION_HASH_STYLE: |
| 2214 | link_info.emit_hash = FALSE; |
| 2215 | link_info.emit_gnu_hash = FALSE; |
| 2216 | if (strcmp (optarg, "sysv") == 0) |
| 2217 | link_info.emit_hash = TRUE; |
| 2218 | else if (strcmp (optarg, "gnu") == 0) |
| 2219 | link_info.emit_gnu_hash = TRUE; |
| 2220 | else if (strcmp (optarg, "both") == 0) |
| 2221 | { |
| 2222 | link_info.emit_hash = TRUE; |
| 2223 | link_info.emit_gnu_hash = TRUE; |
| 2224 | } |
| 2225 | else |
| 2226 | einfo (_("%P%F: invalid hash style \`%s'\n"), optarg); |
| 2227 | break; |
| 2228 | |
| 2229 | EOF |
| 2230 | fi |
| 2231 | fragment <<EOF |
| 2232 | case 'z': |
| 2233 | if (strcmp (optarg, "defs") == 0) |
| 2234 | link_info.unresolved_syms_in_objects = RM_GENERATE_ERROR; |
| 2235 | else if (strcmp (optarg, "muldefs") == 0) |
| 2236 | link_info.allow_multiple_definition = TRUE; |
| 2237 | else if (CONST_STRNEQ (optarg, "max-page-size=")) |
| 2238 | { |
| 2239 | char *end; |
| 2240 | |
| 2241 | config.maxpagesize = strtoul (optarg + 14, &end, 0); |
| 2242 | if (*end || (config.maxpagesize & (config.maxpagesize - 1)) != 0) |
| 2243 | einfo (_("%P%F: invalid maxium page size \`%s'\n"), |
| 2244 | optarg + 14); |
| 2245 | } |
| 2246 | else if (CONST_STRNEQ (optarg, "common-page-size=")) |
| 2247 | { |
| 2248 | char *end; |
| 2249 | config.commonpagesize = strtoul (optarg + 17, &end, 0); |
| 2250 | if (*end |
| 2251 | || (config.commonpagesize & (config.commonpagesize - 1)) != 0) |
| 2252 | einfo (_("%P%F: invalid common page size \`%s'\n"), |
| 2253 | optarg + 17); |
| 2254 | } |
| 2255 | else if (CONST_STRNEQ (optarg, "stack-size=")) |
| 2256 | { |
| 2257 | char *end; |
| 2258 | link_info.stacksize = strtoul (optarg + 11, &end, 0); |
| 2259 | if (*end || link_info.stacksize < 0) |
| 2260 | einfo (_("%P%F: invalid stack size \`%s'\n"), optarg + 11); |
| 2261 | if (!link_info.stacksize) |
| 2262 | /* Use -1 for explicit no-stack, because zero means |
| 2263 | 'default'. */ |
| 2264 | link_info.stacksize = -1; |
| 2265 | } |
| 2266 | else if (strcmp (optarg, "execstack") == 0) |
| 2267 | { |
| 2268 | link_info.execstack = TRUE; |
| 2269 | link_info.noexecstack = FALSE; |
| 2270 | } |
| 2271 | else if (strcmp (optarg, "noexecstack") == 0) |
| 2272 | { |
| 2273 | link_info.noexecstack = TRUE; |
| 2274 | link_info.execstack = FALSE; |
| 2275 | } |
| 2276 | EOF |
| 2277 | if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then |
| 2278 | fragment <<EOF |
| 2279 | else if (strcmp (optarg, "global") == 0) |
| 2280 | link_info.flags_1 |= (bfd_vma) DF_1_GLOBAL; |
| 2281 | else if (strcmp (optarg, "initfirst") == 0) |
| 2282 | link_info.flags_1 |= (bfd_vma) DF_1_INITFIRST; |
| 2283 | else if (strcmp (optarg, "interpose") == 0) |
| 2284 | link_info.flags_1 |= (bfd_vma) DF_1_INTERPOSE; |
| 2285 | else if (strcmp (optarg, "loadfltr") == 0) |
| 2286 | link_info.flags_1 |= (bfd_vma) DF_1_LOADFLTR; |
| 2287 | else if (strcmp (optarg, "nodefaultlib") == 0) |
| 2288 | link_info.flags_1 |= (bfd_vma) DF_1_NODEFLIB; |
| 2289 | else if (strcmp (optarg, "nodelete") == 0) |
| 2290 | link_info.flags_1 |= (bfd_vma) DF_1_NODELETE; |
| 2291 | else if (strcmp (optarg, "nodlopen") == 0) |
| 2292 | link_info.flags_1 |= (bfd_vma) DF_1_NOOPEN; |
| 2293 | else if (strcmp (optarg, "nodump") == 0) |
| 2294 | link_info.flags_1 |= (bfd_vma) DF_1_NODUMP; |
| 2295 | else if (strcmp (optarg, "now") == 0) |
| 2296 | { |
| 2297 | link_info.flags |= (bfd_vma) DF_BIND_NOW; |
| 2298 | link_info.flags_1 |= (bfd_vma) DF_1_NOW; |
| 2299 | } |
| 2300 | else if (strcmp (optarg, "lazy") == 0) |
| 2301 | { |
| 2302 | link_info.flags &= ~(bfd_vma) DF_BIND_NOW; |
| 2303 | link_info.flags_1 &= ~(bfd_vma) DF_1_NOW; |
| 2304 | } |
| 2305 | else if (strcmp (optarg, "origin") == 0) |
| 2306 | { |
| 2307 | link_info.flags |= (bfd_vma) DF_ORIGIN; |
| 2308 | link_info.flags_1 |= (bfd_vma) DF_1_ORIGIN; |
| 2309 | } |
| 2310 | else if (strcmp (optarg, "combreloc") == 0) |
| 2311 | link_info.combreloc = TRUE; |
| 2312 | else if (strcmp (optarg, "nocombreloc") == 0) |
| 2313 | link_info.combreloc = FALSE; |
| 2314 | else if (strcmp (optarg, "nocopyreloc") == 0) |
| 2315 | link_info.nocopyreloc = TRUE; |
| 2316 | else if (strcmp (optarg, "relro") == 0) |
| 2317 | link_info.relro = TRUE; |
| 2318 | else if (strcmp (optarg, "norelro") == 0) |
| 2319 | link_info.relro = FALSE; |
| 2320 | else if (strcmp (optarg, "text") == 0) |
| 2321 | link_info.error_textrel = TRUE; |
| 2322 | else if (strcmp (optarg, "notext") == 0) |
| 2323 | link_info.error_textrel = FALSE; |
| 2324 | else if (strcmp (optarg, "textoff") == 0) |
| 2325 | link_info.error_textrel = FALSE; |
| 2326 | EOF |
| 2327 | fi |
| 2328 | |
| 2329 | fragment <<EOF |
| 2330 | else |
| 2331 | einfo (_("%P: warning: -z %s ignored.\n"), optarg); |
| 2332 | break; |
| 2333 | EOF |
| 2334 | |
| 2335 | if test -n "$PARSE_AND_LIST_ARGS_CASES" ; then |
| 2336 | fragment <<EOF |
| 2337 | $PARSE_AND_LIST_ARGS_CASES |
| 2338 | EOF |
| 2339 | fi |
| 2340 | |
| 2341 | fragment <<EOF |
| 2342 | } |
| 2343 | |
| 2344 | return TRUE; |
| 2345 | } |
| 2346 | |
| 2347 | EOF |
| 2348 | |
| 2349 | if test x"$LDEMUL_LIST_OPTIONS" != xgld"$EMULATION_NAME"_list_options; then |
| 2350 | fragment <<EOF |
| 2351 | |
| 2352 | static void |
| 2353 | gld${EMULATION_NAME}_list_options (FILE * file) |
| 2354 | { |
| 2355 | EOF |
| 2356 | if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then |
| 2357 | fragment <<EOF |
| 2358 | fprintf (file, _("\ |
| 2359 | --audit=AUDITLIB Specify a library to use for auditing\n")); |
| 2360 | fprintf (file, _("\ |
| 2361 | -Bgroup Selects group name lookup rules for DSO\n")); |
| 2362 | EOF |
| 2363 | fi |
| 2364 | fragment <<EOF |
| 2365 | fprintf (file, _("\ |
| 2366 | --build-id[=STYLE] Generate build ID note\n")); |
| 2367 | EOF |
| 2368 | if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then |
| 2369 | fragment <<EOF |
| 2370 | fprintf (file, _("\ |
| 2371 | -P AUDITLIB, --depaudit=AUDITLIB\n" "\ |
| 2372 | Specify a library to use for auditing dependencies\n")); |
| 2373 | fprintf (file, _("\ |
| 2374 | --disable-new-dtags Disable new dynamic tags\n")); |
| 2375 | fprintf (file, _("\ |
| 2376 | --enable-new-dtags Enable new dynamic tags\n")); |
| 2377 | fprintf (file, _("\ |
| 2378 | --eh-frame-hdr Create .eh_frame_hdr section\n")); |
| 2379 | fprintf (file, _("\ |
| 2380 | --exclude-libs=LIBS Make all symbols in LIBS hidden\n")); |
| 2381 | fprintf (file, _("\ |
| 2382 | --hash-style=STYLE Set hash style to sysv, gnu or both\n")); |
| 2383 | fprintf (file, _("\ |
| 2384 | -z combreloc Merge dynamic relocs into one section and sort\n")); |
| 2385 | EOF |
| 2386 | fi |
| 2387 | |
| 2388 | fragment <<EOF |
| 2389 | fprintf (file, _("\ |
| 2390 | -z common-page-size=SIZE Set common page size to SIZE\n")); |
| 2391 | fprintf (file, _("\ |
| 2392 | -z defs Report unresolved symbols in object files.\n")); |
| 2393 | fprintf (file, _("\ |
| 2394 | -z execstack Mark executable as requiring executable stack\n")); |
| 2395 | EOF |
| 2396 | |
| 2397 | if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then |
| 2398 | fragment <<EOF |
| 2399 | fprintf (file, _("\ |
| 2400 | -z global Make symbols in DSO available for subsequently\n\ |
| 2401 | loaded objects\n")); |
| 2402 | fprintf (file, _("\ |
| 2403 | -z initfirst Mark DSO to be initialized first at runtime\n")); |
| 2404 | fprintf (file, _("\ |
| 2405 | -z interpose Mark object to interpose all DSOs but executable\n")); |
| 2406 | fprintf (file, _("\ |
| 2407 | -z lazy Mark object lazy runtime binding (default)\n")); |
| 2408 | fprintf (file, _("\ |
| 2409 | -z loadfltr Mark object requiring immediate process\n")); |
| 2410 | EOF |
| 2411 | fi |
| 2412 | |
| 2413 | fragment <<EOF |
| 2414 | fprintf (file, _("\ |
| 2415 | -z max-page-size=SIZE Set maximum page size to SIZE\n")); |
| 2416 | fprintf (file, _("\ |
| 2417 | -z muldefs Allow multiple definitions\n")); |
| 2418 | EOF |
| 2419 | |
| 2420 | if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then |
| 2421 | fragment <<EOF |
| 2422 | fprintf (file, _("\ |
| 2423 | -z nocombreloc Don't merge dynamic relocs into one section\n")); |
| 2424 | fprintf (file, _("\ |
| 2425 | -z nocopyreloc Don't create copy relocs\n")); |
| 2426 | fprintf (file, _("\ |
| 2427 | -z nodefaultlib Mark object not to use default search paths\n")); |
| 2428 | fprintf (file, _("\ |
| 2429 | -z nodelete Mark DSO non-deletable at runtime\n")); |
| 2430 | fprintf (file, _("\ |
| 2431 | -z nodlopen Mark DSO not available to dlopen\n")); |
| 2432 | fprintf (file, _("\ |
| 2433 | -z nodump Mark DSO not available to dldump\n")); |
| 2434 | EOF |
| 2435 | fi |
| 2436 | fragment <<EOF |
| 2437 | fprintf (file, _("\ |
| 2438 | -z noexecstack Mark executable as not requiring executable stack\n")); |
| 2439 | EOF |
| 2440 | if test x"$GENERATE_SHLIB_SCRIPT" = xyes; then |
| 2441 | fragment <<EOF |
| 2442 | fprintf (file, _("\ |
| 2443 | -z norelro Don't create RELRO program header\n")); |
| 2444 | fprintf (file, _("\ |
| 2445 | -z now Mark object non-lazy runtime binding\n")); |
| 2446 | fprintf (file, _("\ |
| 2447 | -z origin Mark object requiring immediate \$ORIGIN\n\ |
| 2448 | processing at runtime\n")); |
| 2449 | fprintf (file, _("\ |
| 2450 | -z relro Create RELRO program header\n")); |
| 2451 | fprintf (file, _("\ |
| 2452 | -z stacksize=SIZE Set size of stack segment\n")); |
| 2453 | EOF |
| 2454 | fi |
| 2455 | |
| 2456 | if test -n "$PARSE_AND_LIST_OPTIONS" ; then |
| 2457 | fragment <<EOF |
| 2458 | $PARSE_AND_LIST_OPTIONS |
| 2459 | EOF |
| 2460 | fi |
| 2461 | |
| 2462 | fragment <<EOF |
| 2463 | } |
| 2464 | EOF |
| 2465 | |
| 2466 | if test -n "$PARSE_AND_LIST_EPILOGUE" ; then |
| 2467 | fragment <<EOF |
| 2468 | $PARSE_AND_LIST_EPILOGUE |
| 2469 | EOF |
| 2470 | fi |
| 2471 | fi |
| 2472 | |
| 2473 | fragment <<EOF |
| 2474 | |
| 2475 | struct ld_emulation_xfer_struct ld_${EMULATION_NAME}_emulation = |
| 2476 | { |
| 2477 | ${LDEMUL_BEFORE_PARSE-gld${EMULATION_NAME}_before_parse}, |
| 2478 | ${LDEMUL_SYSLIB-syslib_default}, |
| 2479 | ${LDEMUL_HLL-hll_default}, |
| 2480 | ${LDEMUL_AFTER_PARSE-after_parse_default}, |
| 2481 | ${LDEMUL_AFTER_OPEN-gld${EMULATION_NAME}_after_open}, |
| 2482 | ${LDEMUL_AFTER_ALLOCATION-gld${EMULATION_NAME}_after_allocation}, |
| 2483 | ${LDEMUL_SET_OUTPUT_ARCH-set_output_arch_default}, |
| 2484 | ${LDEMUL_CHOOSE_TARGET-ldemul_default_target}, |
| 2485 | ${LDEMUL_BEFORE_ALLOCATION-gld${EMULATION_NAME}_before_allocation}, |
| 2486 | ${LDEMUL_GET_SCRIPT-gld${EMULATION_NAME}_get_script}, |
| 2487 | "${EMULATION_NAME}", |
| 2488 | "${OUTPUT_FORMAT}", |
| 2489 | ${LDEMUL_FINISH-finish_default}, |
| 2490 | ${LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS-NULL}, |
| 2491 | ${LDEMUL_OPEN_DYNAMIC_ARCHIVE-gld${EMULATION_NAME}_open_dynamic_archive}, |
| 2492 | ${LDEMUL_PLACE_ORPHAN-gld${EMULATION_NAME}_place_orphan}, |
| 2493 | ${LDEMUL_SET_SYMBOLS-NULL}, |
| 2494 | ${LDEMUL_PARSE_ARGS-NULL}, |
| 2495 | gld${EMULATION_NAME}_add_options, |
| 2496 | gld${EMULATION_NAME}_handle_option, |
| 2497 | ${LDEMUL_UNRECOGNIZED_FILE-NULL}, |
| 2498 | ${LDEMUL_LIST_OPTIONS-gld${EMULATION_NAME}_list_options}, |
| 2499 | ${LDEMUL_RECOGNIZED_FILE-gld${EMULATION_NAME}_load_symbols}, |
| 2500 | ${LDEMUL_FIND_POTENTIAL_LIBRARIES-NULL}, |
| 2501 | ${LDEMUL_NEW_VERS_PATTERN-NULL}, |
| 2502 | ${LDEMUL_EXTRA_MAP_FILE_TEXT-NULL} |
| 2503 | }; |
| 2504 | EOF |