| 1 | /* Linker command language support. |
| 2 | Copyright (C) 1991-2019 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of the GNU Binutils. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 3 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
| 19 | MA 02110-1301, USA. */ |
| 20 | |
| 21 | #include "sysdep.h" |
| 22 | #include "bfd.h" |
| 23 | #include "libiberty.h" |
| 24 | #include "filenames.h" |
| 25 | #include "safe-ctype.h" |
| 26 | #include "obstack.h" |
| 27 | #include "bfdlink.h" |
| 28 | |
| 29 | #include "ld.h" |
| 30 | #include "ldmain.h" |
| 31 | #include "ldexp.h" |
| 32 | #include "ldlang.h" |
| 33 | #include <ldgram.h> |
| 34 | #include "ldlex.h" |
| 35 | #include "ldmisc.h" |
| 36 | #include "ldctor.h" |
| 37 | #include "ldfile.h" |
| 38 | #include "ldemul.h" |
| 39 | #include "fnmatch.h" |
| 40 | #include "demangle.h" |
| 41 | #include "hashtab.h" |
| 42 | #include "elf-bfd.h" |
| 43 | #ifdef ENABLE_PLUGINS |
| 44 | #include "plugin.h" |
| 45 | #endif /* ENABLE_PLUGINS */ |
| 46 | |
| 47 | #ifndef offsetof |
| 48 | #define offsetof(TYPE, MEMBER) ((size_t) & (((TYPE*) 0)->MEMBER)) |
| 49 | #endif |
| 50 | |
| 51 | /* Convert between addresses in bytes and sizes in octets. |
| 52 | For currently supported targets, octets_per_byte is always a power |
| 53 | of two, so we can use shifts. */ |
| 54 | #define TO_ADDR(X) ((X) >> opb_shift) |
| 55 | #define TO_SIZE(X) ((X) << opb_shift) |
| 56 | |
| 57 | /* Local variables. */ |
| 58 | static struct obstack stat_obstack; |
| 59 | static struct obstack map_obstack; |
| 60 | |
| 61 | #define obstack_chunk_alloc xmalloc |
| 62 | #define obstack_chunk_free free |
| 63 | static const char *entry_symbol_default = "start"; |
| 64 | static bfd_boolean map_head_is_link_order = FALSE; |
| 65 | static lang_output_section_statement_type *default_common_section; |
| 66 | static bfd_boolean map_option_f; |
| 67 | static bfd_vma print_dot; |
| 68 | static lang_input_statement_type *first_file; |
| 69 | static const char *current_target; |
| 70 | /* Header for list of statements corresponding to any files involved in the |
| 71 | link, either specified from the command-line or added implicitely (eg. |
| 72 | archive member used to resolved undefined symbol, wildcard statement from |
| 73 | linker script, etc.). Next pointer is in next field of a |
| 74 | lang_statement_header_type (reached via header field in a |
| 75 | lang_statement_union). */ |
| 76 | static lang_statement_list_type statement_list; |
| 77 | static lang_statement_list_type *stat_save[10]; |
| 78 | static lang_statement_list_type **stat_save_ptr = &stat_save[0]; |
| 79 | static struct unique_sections *unique_section_list; |
| 80 | static struct asneeded_minfo *asneeded_list_head; |
| 81 | static unsigned int opb_shift = 0; |
| 82 | |
| 83 | /* Forward declarations. */ |
| 84 | static void exp_init_os (etree_type *); |
| 85 | static lang_input_statement_type *lookup_name (const char *); |
| 86 | static void insert_undefined (const char *); |
| 87 | static bfd_boolean sort_def_symbol (struct bfd_link_hash_entry *, void *); |
| 88 | static void print_statement (lang_statement_union_type *, |
| 89 | lang_output_section_statement_type *); |
| 90 | static void print_statement_list (lang_statement_union_type *, |
| 91 | lang_output_section_statement_type *); |
| 92 | static void print_statements (void); |
| 93 | static void print_input_section (asection *, bfd_boolean); |
| 94 | static bfd_boolean lang_one_common (struct bfd_link_hash_entry *, void *); |
| 95 | static void lang_record_phdrs (void); |
| 96 | static void lang_do_version_exports_section (void); |
| 97 | static void lang_finalize_version_expr_head |
| 98 | (struct bfd_elf_version_expr_head *); |
| 99 | static void lang_do_memory_regions (void); |
| 100 | |
| 101 | /* Exported variables. */ |
| 102 | const char *output_target; |
| 103 | lang_output_section_statement_type *abs_output_section; |
| 104 | lang_statement_list_type lang_output_section_statement; |
| 105 | lang_statement_list_type *stat_ptr = &statement_list; |
| 106 | /* Header for list of statements corresponding to files used in the final |
| 107 | executable. This can be either object file specified on the command-line |
| 108 | or library member resolving an undefined reference. Next pointer is in next |
| 109 | field of a lang_input_statement_type (reached via input_statement field in a |
| 110 | lang_statement_union). */ |
| 111 | lang_statement_list_type file_chain = { NULL, NULL }; |
| 112 | /* Header for list of statements corresponding to files specified on the |
| 113 | command-line for linking. It thus contains real object files and archive |
| 114 | but not archive members. Next pointer is in next_real_file field of a |
| 115 | lang_input_statement_type statement (reached via input_statement field in a |
| 116 | lang_statement_union). */ |
| 117 | lang_statement_list_type input_file_chain; |
| 118 | struct bfd_sym_chain entry_symbol = { NULL, NULL }; |
| 119 | const char *entry_section = ".text"; |
| 120 | struct lang_input_statement_flags input_flags; |
| 121 | bfd_boolean entry_from_cmdline; |
| 122 | bfd_boolean undef_from_cmdline; |
| 123 | bfd_boolean lang_has_input_file = FALSE; |
| 124 | bfd_boolean had_output_filename = FALSE; |
| 125 | bfd_boolean lang_float_flag = FALSE; |
| 126 | bfd_boolean delete_output_file_on_failure = FALSE; |
| 127 | struct lang_phdr *lang_phdr_list; |
| 128 | struct lang_nocrossrefs *nocrossref_list; |
| 129 | struct asneeded_minfo **asneeded_list_tail; |
| 130 | |
| 131 | /* Functions that traverse the linker script and might evaluate |
| 132 | DEFINED() need to increment this at the start of the traversal. */ |
| 133 | int lang_statement_iteration = 0; |
| 134 | |
| 135 | /* Return TRUE if the PATTERN argument is a wildcard pattern. |
| 136 | Although backslashes are treated specially if a pattern contains |
| 137 | wildcards, we do not consider the mere presence of a backslash to |
| 138 | be enough to cause the pattern to be treated as a wildcard. |
| 139 | That lets us handle DOS filenames more naturally. */ |
| 140 | #define wildcardp(pattern) (strpbrk ((pattern), "?*[") != NULL) |
| 141 | |
| 142 | #define new_stat(x, y) \ |
| 143 | (x##_type *) new_statement (x##_enum, sizeof (x##_type), y) |
| 144 | |
| 145 | #define outside_section_address(q) \ |
| 146 | ((q)->output_offset + (q)->output_section->vma) |
| 147 | |
| 148 | #define outside_symbol_address(q) \ |
| 149 | ((q)->value + outside_section_address (q->section)) |
| 150 | |
| 151 | #define SECTION_NAME_MAP_LENGTH (16) |
| 152 | |
| 153 | void * |
| 154 | stat_alloc (size_t size) |
| 155 | { |
| 156 | return obstack_alloc (&stat_obstack, size); |
| 157 | } |
| 158 | |
| 159 | static int |
| 160 | name_match (const char *pattern, const char *name) |
| 161 | { |
| 162 | if (wildcardp (pattern)) |
| 163 | return fnmatch (pattern, name, 0); |
| 164 | return strcmp (pattern, name); |
| 165 | } |
| 166 | |
| 167 | /* If PATTERN is of the form archive:file, return a pointer to the |
| 168 | separator. If not, return NULL. */ |
| 169 | |
| 170 | static char * |
| 171 | archive_path (const char *pattern) |
| 172 | { |
| 173 | char *p = NULL; |
| 174 | |
| 175 | if (link_info.path_separator == 0) |
| 176 | return p; |
| 177 | |
| 178 | p = strchr (pattern, link_info.path_separator); |
| 179 | #ifdef HAVE_DOS_BASED_FILE_SYSTEM |
| 180 | if (p == NULL || link_info.path_separator != ':') |
| 181 | return p; |
| 182 | |
| 183 | /* Assume a match on the second char is part of drive specifier, |
| 184 | as in "c:\silly.dos". */ |
| 185 | if (p == pattern + 1 && ISALPHA (*pattern)) |
| 186 | p = strchr (p + 1, link_info.path_separator); |
| 187 | #endif |
| 188 | return p; |
| 189 | } |
| 190 | |
| 191 | /* Given that FILE_SPEC results in a non-NULL SEP result from archive_path, |
| 192 | return whether F matches FILE_SPEC. */ |
| 193 | |
| 194 | static bfd_boolean |
| 195 | input_statement_is_archive_path (const char *file_spec, char *sep, |
| 196 | lang_input_statement_type *f) |
| 197 | { |
| 198 | bfd_boolean match = FALSE; |
| 199 | |
| 200 | if ((*(sep + 1) == 0 |
| 201 | || name_match (sep + 1, f->filename) == 0) |
| 202 | && ((sep != file_spec) |
| 203 | == (f->the_bfd != NULL && f->the_bfd->my_archive != NULL))) |
| 204 | { |
| 205 | match = TRUE; |
| 206 | |
| 207 | if (sep != file_spec) |
| 208 | { |
| 209 | const char *aname = f->the_bfd->my_archive->filename; |
| 210 | *sep = 0; |
| 211 | match = name_match (file_spec, aname) == 0; |
| 212 | *sep = link_info.path_separator; |
| 213 | } |
| 214 | } |
| 215 | return match; |
| 216 | } |
| 217 | |
| 218 | static bfd_boolean |
| 219 | unique_section_p (const asection *sec, |
| 220 | const lang_output_section_statement_type *os) |
| 221 | { |
| 222 | struct unique_sections *unam; |
| 223 | const char *secnam; |
| 224 | |
| 225 | if (!link_info.resolve_section_groups |
| 226 | && sec->owner != NULL |
| 227 | && bfd_is_group_section (sec->owner, sec)) |
| 228 | return !(os != NULL |
| 229 | && strcmp (os->name, DISCARD_SECTION_NAME) == 0); |
| 230 | |
| 231 | secnam = sec->name; |
| 232 | for (unam = unique_section_list; unam; unam = unam->next) |
| 233 | if (name_match (unam->name, secnam) == 0) |
| 234 | return TRUE; |
| 235 | |
| 236 | return FALSE; |
| 237 | } |
| 238 | |
| 239 | /* Generic traversal routines for finding matching sections. */ |
| 240 | |
| 241 | /* Return true if FILE matches a pattern in EXCLUDE_LIST, otherwise return |
| 242 | false. */ |
| 243 | |
| 244 | static bfd_boolean |
| 245 | walk_wild_file_in_exclude_list (struct name_list *exclude_list, |
| 246 | lang_input_statement_type *file) |
| 247 | { |
| 248 | struct name_list *list_tmp; |
| 249 | |
| 250 | for (list_tmp = exclude_list; |
| 251 | list_tmp; |
| 252 | list_tmp = list_tmp->next) |
| 253 | { |
| 254 | char *p = archive_path (list_tmp->name); |
| 255 | |
| 256 | if (p != NULL) |
| 257 | { |
| 258 | if (input_statement_is_archive_path (list_tmp->name, p, file)) |
| 259 | return TRUE; |
| 260 | } |
| 261 | |
| 262 | else if (name_match (list_tmp->name, file->filename) == 0) |
| 263 | return TRUE; |
| 264 | |
| 265 | /* FIXME: Perhaps remove the following at some stage? Matching |
| 266 | unadorned archives like this was never documented and has |
| 267 | been superceded by the archive:path syntax. */ |
| 268 | else if (file->the_bfd != NULL |
| 269 | && file->the_bfd->my_archive != NULL |
| 270 | && name_match (list_tmp->name, |
| 271 | file->the_bfd->my_archive->filename) == 0) |
| 272 | return TRUE; |
| 273 | } |
| 274 | |
| 275 | return FALSE; |
| 276 | } |
| 277 | |
| 278 | /* Try processing a section against a wildcard. This just calls |
| 279 | the callback unless the filename exclusion list is present |
| 280 | and excludes the file. It's hardly ever present so this |
| 281 | function is very fast. */ |
| 282 | |
| 283 | static void |
| 284 | walk_wild_consider_section (lang_wild_statement_type *ptr, |
| 285 | lang_input_statement_type *file, |
| 286 | asection *s, |
| 287 | struct wildcard_list *sec, |
| 288 | callback_t callback, |
| 289 | void *data) |
| 290 | { |
| 291 | /* Don't process sections from files which were excluded. */ |
| 292 | if (walk_wild_file_in_exclude_list (sec->spec.exclude_name_list, file)) |
| 293 | return; |
| 294 | |
| 295 | (*callback) (ptr, sec, s, ptr->section_flag_list, file, data); |
| 296 | } |
| 297 | |
| 298 | /* Lowest common denominator routine that can handle everything correctly, |
| 299 | but slowly. */ |
| 300 | |
| 301 | static void |
| 302 | walk_wild_section_general (lang_wild_statement_type *ptr, |
| 303 | lang_input_statement_type *file, |
| 304 | callback_t callback, |
| 305 | void *data) |
| 306 | { |
| 307 | asection *s; |
| 308 | struct wildcard_list *sec; |
| 309 | |
| 310 | for (s = file->the_bfd->sections; s != NULL; s = s->next) |
| 311 | { |
| 312 | sec = ptr->section_list; |
| 313 | if (sec == NULL) |
| 314 | (*callback) (ptr, sec, s, ptr->section_flag_list, file, data); |
| 315 | |
| 316 | while (sec != NULL) |
| 317 | { |
| 318 | bfd_boolean skip = FALSE; |
| 319 | |
| 320 | if (sec->spec.name != NULL) |
| 321 | { |
| 322 | const char *sname = bfd_get_section_name (file->the_bfd, s); |
| 323 | |
| 324 | skip = name_match (sec->spec.name, sname) != 0; |
| 325 | } |
| 326 | |
| 327 | if (!skip) |
| 328 | walk_wild_consider_section (ptr, file, s, sec, callback, data); |
| 329 | |
| 330 | sec = sec->next; |
| 331 | } |
| 332 | } |
| 333 | } |
| 334 | |
| 335 | /* Routines to find a single section given its name. If there's more |
| 336 | than one section with that name, we report that. */ |
| 337 | |
| 338 | typedef struct |
| 339 | { |
| 340 | asection *found_section; |
| 341 | bfd_boolean multiple_sections_found; |
| 342 | } section_iterator_callback_data; |
| 343 | |
| 344 | static bfd_boolean |
| 345 | section_iterator_callback (bfd *abfd ATTRIBUTE_UNUSED, asection *s, void *data) |
| 346 | { |
| 347 | section_iterator_callback_data *d = (section_iterator_callback_data *) data; |
| 348 | |
| 349 | if (d->found_section != NULL) |
| 350 | { |
| 351 | d->multiple_sections_found = TRUE; |
| 352 | return TRUE; |
| 353 | } |
| 354 | |
| 355 | d->found_section = s; |
| 356 | return FALSE; |
| 357 | } |
| 358 | |
| 359 | static asection * |
| 360 | find_section (lang_input_statement_type *file, |
| 361 | struct wildcard_list *sec, |
| 362 | bfd_boolean *multiple_sections_found) |
| 363 | { |
| 364 | section_iterator_callback_data cb_data = { NULL, FALSE }; |
| 365 | |
| 366 | bfd_get_section_by_name_if (file->the_bfd, sec->spec.name, |
| 367 | section_iterator_callback, &cb_data); |
| 368 | *multiple_sections_found = cb_data.multiple_sections_found; |
| 369 | return cb_data.found_section; |
| 370 | } |
| 371 | |
| 372 | /* Code for handling simple wildcards without going through fnmatch, |
| 373 | which can be expensive because of charset translations etc. */ |
| 374 | |
| 375 | /* A simple wild is a literal string followed by a single '*', |
| 376 | where the literal part is at least 4 characters long. */ |
| 377 | |
| 378 | static bfd_boolean |
| 379 | is_simple_wild (const char *name) |
| 380 | { |
| 381 | size_t len = strcspn (name, "*?["); |
| 382 | return len >= 4 && name[len] == '*' && name[len + 1] == '\0'; |
| 383 | } |
| 384 | |
| 385 | static bfd_boolean |
| 386 | match_simple_wild (const char *pattern, const char *name) |
| 387 | { |
| 388 | /* The first four characters of the pattern are guaranteed valid |
| 389 | non-wildcard characters. So we can go faster. */ |
| 390 | if (pattern[0] != name[0] || pattern[1] != name[1] |
| 391 | || pattern[2] != name[2] || pattern[3] != name[3]) |
| 392 | return FALSE; |
| 393 | |
| 394 | pattern += 4; |
| 395 | name += 4; |
| 396 | while (*pattern != '*') |
| 397 | if (*name++ != *pattern++) |
| 398 | return FALSE; |
| 399 | |
| 400 | return TRUE; |
| 401 | } |
| 402 | |
| 403 | /* Return the numerical value of the init_priority attribute from |
| 404 | section name NAME. */ |
| 405 | |
| 406 | static unsigned long |
| 407 | get_init_priority (const char *name) |
| 408 | { |
| 409 | char *end; |
| 410 | unsigned long init_priority; |
| 411 | |
| 412 | /* GCC uses the following section names for the init_priority |
| 413 | attribute with numerical values 101 and 65535 inclusive. A |
| 414 | lower value means a higher priority. |
| 415 | |
| 416 | 1: .init_array.NNNN/.fini_array.NNNN: Where NNNN is the |
| 417 | decimal numerical value of the init_priority attribute. |
| 418 | The order of execution in .init_array is forward and |
| 419 | .fini_array is backward. |
| 420 | 2: .ctors.NNNN/.dtors.NNNN: Where NNNN is 65535 minus the |
| 421 | decimal numerical value of the init_priority attribute. |
| 422 | The order of execution in .ctors is backward and .dtors |
| 423 | is forward. |
| 424 | */ |
| 425 | if (strncmp (name, ".init_array.", 12) == 0 |
| 426 | || strncmp (name, ".fini_array.", 12) == 0) |
| 427 | { |
| 428 | init_priority = strtoul (name + 12, &end, 10); |
| 429 | return *end ? 0 : init_priority; |
| 430 | } |
| 431 | else if (strncmp (name, ".ctors.", 7) == 0 |
| 432 | || strncmp (name, ".dtors.", 7) == 0) |
| 433 | { |
| 434 | init_priority = strtoul (name + 7, &end, 10); |
| 435 | return *end ? 0 : 65535 - init_priority; |
| 436 | } |
| 437 | |
| 438 | return 0; |
| 439 | } |
| 440 | |
| 441 | /* Compare sections ASEC and BSEC according to SORT. */ |
| 442 | |
| 443 | static int |
| 444 | compare_section (sort_type sort, asection *asec, asection *bsec) |
| 445 | { |
| 446 | int ret; |
| 447 | unsigned long ainit_priority, binit_priority; |
| 448 | |
| 449 | switch (sort) |
| 450 | { |
| 451 | default: |
| 452 | abort (); |
| 453 | |
| 454 | case by_init_priority: |
| 455 | ainit_priority |
| 456 | = get_init_priority (bfd_get_section_name (asec->owner, asec)); |
| 457 | binit_priority |
| 458 | = get_init_priority (bfd_get_section_name (bsec->owner, bsec)); |
| 459 | if (ainit_priority == 0 || binit_priority == 0) |
| 460 | goto sort_by_name; |
| 461 | ret = ainit_priority - binit_priority; |
| 462 | if (ret) |
| 463 | break; |
| 464 | else |
| 465 | goto sort_by_name; |
| 466 | |
| 467 | case by_alignment_name: |
| 468 | ret = (bfd_section_alignment (bsec->owner, bsec) |
| 469 | - bfd_section_alignment (asec->owner, asec)); |
| 470 | if (ret) |
| 471 | break; |
| 472 | /* Fall through. */ |
| 473 | |
| 474 | case by_name: |
| 475 | sort_by_name: |
| 476 | ret = strcmp (bfd_get_section_name (asec->owner, asec), |
| 477 | bfd_get_section_name (bsec->owner, bsec)); |
| 478 | break; |
| 479 | |
| 480 | case by_name_alignment: |
| 481 | ret = strcmp (bfd_get_section_name (asec->owner, asec), |
| 482 | bfd_get_section_name (bsec->owner, bsec)); |
| 483 | if (ret) |
| 484 | break; |
| 485 | /* Fall through. */ |
| 486 | |
| 487 | case by_alignment: |
| 488 | ret = (bfd_section_alignment (bsec->owner, bsec) |
| 489 | - bfd_section_alignment (asec->owner, asec)); |
| 490 | break; |
| 491 | } |
| 492 | |
| 493 | return ret; |
| 494 | } |
| 495 | |
| 496 | /* Build a Binary Search Tree to sort sections, unlike insertion sort |
| 497 | used in wild_sort(). BST is considerably faster if the number of |
| 498 | of sections are large. */ |
| 499 | |
| 500 | static lang_section_bst_type ** |
| 501 | wild_sort_fast (lang_wild_statement_type *wild, |
| 502 | struct wildcard_list *sec, |
| 503 | lang_input_statement_type *file ATTRIBUTE_UNUSED, |
| 504 | asection *section) |
| 505 | { |
| 506 | lang_section_bst_type **tree; |
| 507 | |
| 508 | tree = &wild->tree; |
| 509 | if (!wild->filenames_sorted |
| 510 | && (sec == NULL || sec->spec.sorted == none)) |
| 511 | { |
| 512 | /* Append at the right end of tree. */ |
| 513 | while (*tree) |
| 514 | tree = &((*tree)->right); |
| 515 | return tree; |
| 516 | } |
| 517 | |
| 518 | while (*tree) |
| 519 | { |
| 520 | /* Find the correct node to append this section. */ |
| 521 | if (compare_section (sec->spec.sorted, section, (*tree)->section) < 0) |
| 522 | tree = &((*tree)->left); |
| 523 | else |
| 524 | tree = &((*tree)->right); |
| 525 | } |
| 526 | |
| 527 | return tree; |
| 528 | } |
| 529 | |
| 530 | /* Use wild_sort_fast to build a BST to sort sections. */ |
| 531 | |
| 532 | static void |
| 533 | output_section_callback_fast (lang_wild_statement_type *ptr, |
| 534 | struct wildcard_list *sec, |
| 535 | asection *section, |
| 536 | struct flag_info *sflag_list ATTRIBUTE_UNUSED, |
| 537 | lang_input_statement_type *file, |
| 538 | void *output) |
| 539 | { |
| 540 | lang_section_bst_type *node; |
| 541 | lang_section_bst_type **tree; |
| 542 | lang_output_section_statement_type *os; |
| 543 | |
| 544 | os = (lang_output_section_statement_type *) output; |
| 545 | |
| 546 | if (unique_section_p (section, os)) |
| 547 | return; |
| 548 | |
| 549 | node = (lang_section_bst_type *) xmalloc (sizeof (lang_section_bst_type)); |
| 550 | node->left = 0; |
| 551 | node->right = 0; |
| 552 | node->section = section; |
| 553 | |
| 554 | tree = wild_sort_fast (ptr, sec, file, section); |
| 555 | if (tree != NULL) |
| 556 | *tree = node; |
| 557 | } |
| 558 | |
| 559 | /* Convert a sorted sections' BST back to list form. */ |
| 560 | |
| 561 | static void |
| 562 | output_section_callback_tree_to_list (lang_wild_statement_type *ptr, |
| 563 | lang_section_bst_type *tree, |
| 564 | void *output) |
| 565 | { |
| 566 | if (tree->left) |
| 567 | output_section_callback_tree_to_list (ptr, tree->left, output); |
| 568 | |
| 569 | lang_add_section (&ptr->children, tree->section, NULL, |
| 570 | (lang_output_section_statement_type *) output); |
| 571 | |
| 572 | if (tree->right) |
| 573 | output_section_callback_tree_to_list (ptr, tree->right, output); |
| 574 | |
| 575 | free (tree); |
| 576 | } |
| 577 | |
| 578 | /* Specialized, optimized routines for handling different kinds of |
| 579 | wildcards */ |
| 580 | |
| 581 | static void |
| 582 | walk_wild_section_specs1_wild0 (lang_wild_statement_type *ptr, |
| 583 | lang_input_statement_type *file, |
| 584 | callback_t callback, |
| 585 | void *data) |
| 586 | { |
| 587 | /* We can just do a hash lookup for the section with the right name. |
| 588 | But if that lookup discovers more than one section with the name |
| 589 | (should be rare), we fall back to the general algorithm because |
| 590 | we would otherwise have to sort the sections to make sure they |
| 591 | get processed in the bfd's order. */ |
| 592 | bfd_boolean multiple_sections_found; |
| 593 | struct wildcard_list *sec0 = ptr->handler_data[0]; |
| 594 | asection *s0 = find_section (file, sec0, &multiple_sections_found); |
| 595 | |
| 596 | if (multiple_sections_found) |
| 597 | walk_wild_section_general (ptr, file, callback, data); |
| 598 | else if (s0) |
| 599 | walk_wild_consider_section (ptr, file, s0, sec0, callback, data); |
| 600 | } |
| 601 | |
| 602 | static void |
| 603 | walk_wild_section_specs1_wild1 (lang_wild_statement_type *ptr, |
| 604 | lang_input_statement_type *file, |
| 605 | callback_t callback, |
| 606 | void *data) |
| 607 | { |
| 608 | asection *s; |
| 609 | struct wildcard_list *wildsec0 = ptr->handler_data[0]; |
| 610 | |
| 611 | for (s = file->the_bfd->sections; s != NULL; s = s->next) |
| 612 | { |
| 613 | const char *sname = bfd_get_section_name (file->the_bfd, s); |
| 614 | bfd_boolean skip = !match_simple_wild (wildsec0->spec.name, sname); |
| 615 | |
| 616 | if (!skip) |
| 617 | walk_wild_consider_section (ptr, file, s, wildsec0, callback, data); |
| 618 | } |
| 619 | } |
| 620 | |
| 621 | static void |
| 622 | walk_wild_section_specs2_wild1 (lang_wild_statement_type *ptr, |
| 623 | lang_input_statement_type *file, |
| 624 | callback_t callback, |
| 625 | void *data) |
| 626 | { |
| 627 | asection *s; |
| 628 | struct wildcard_list *sec0 = ptr->handler_data[0]; |
| 629 | struct wildcard_list *wildsec1 = ptr->handler_data[1]; |
| 630 | bfd_boolean multiple_sections_found; |
| 631 | asection *s0 = find_section (file, sec0, &multiple_sections_found); |
| 632 | |
| 633 | if (multiple_sections_found) |
| 634 | { |
| 635 | walk_wild_section_general (ptr, file, callback, data); |
| 636 | return; |
| 637 | } |
| 638 | |
| 639 | /* Note that if the section was not found, s0 is NULL and |
| 640 | we'll simply never succeed the s == s0 test below. */ |
| 641 | for (s = file->the_bfd->sections; s != NULL; s = s->next) |
| 642 | { |
| 643 | /* Recall that in this code path, a section cannot satisfy more |
| 644 | than one spec, so if s == s0 then it cannot match |
| 645 | wildspec1. */ |
| 646 | if (s == s0) |
| 647 | walk_wild_consider_section (ptr, file, s, sec0, callback, data); |
| 648 | else |
| 649 | { |
| 650 | const char *sname = bfd_get_section_name (file->the_bfd, s); |
| 651 | bfd_boolean skip = !match_simple_wild (wildsec1->spec.name, sname); |
| 652 | |
| 653 | if (!skip) |
| 654 | walk_wild_consider_section (ptr, file, s, wildsec1, callback, |
| 655 | data); |
| 656 | } |
| 657 | } |
| 658 | } |
| 659 | |
| 660 | static void |
| 661 | walk_wild_section_specs3_wild2 (lang_wild_statement_type *ptr, |
| 662 | lang_input_statement_type *file, |
| 663 | callback_t callback, |
| 664 | void *data) |
| 665 | { |
| 666 | asection *s; |
| 667 | struct wildcard_list *sec0 = ptr->handler_data[0]; |
| 668 | struct wildcard_list *wildsec1 = ptr->handler_data[1]; |
| 669 | struct wildcard_list *wildsec2 = ptr->handler_data[2]; |
| 670 | bfd_boolean multiple_sections_found; |
| 671 | asection *s0 = find_section (file, sec0, &multiple_sections_found); |
| 672 | |
| 673 | if (multiple_sections_found) |
| 674 | { |
| 675 | walk_wild_section_general (ptr, file, callback, data); |
| 676 | return; |
| 677 | } |
| 678 | |
| 679 | for (s = file->the_bfd->sections; s != NULL; s = s->next) |
| 680 | { |
| 681 | if (s == s0) |
| 682 | walk_wild_consider_section (ptr, file, s, sec0, callback, data); |
| 683 | else |
| 684 | { |
| 685 | const char *sname = bfd_get_section_name (file->the_bfd, s); |
| 686 | bfd_boolean skip = !match_simple_wild (wildsec1->spec.name, sname); |
| 687 | |
| 688 | if (!skip) |
| 689 | walk_wild_consider_section (ptr, file, s, wildsec1, callback, data); |
| 690 | else |
| 691 | { |
| 692 | skip = !match_simple_wild (wildsec2->spec.name, sname); |
| 693 | if (!skip) |
| 694 | walk_wild_consider_section (ptr, file, s, wildsec2, callback, |
| 695 | data); |
| 696 | } |
| 697 | } |
| 698 | } |
| 699 | } |
| 700 | |
| 701 | static void |
| 702 | walk_wild_section_specs4_wild2 (lang_wild_statement_type *ptr, |
| 703 | lang_input_statement_type *file, |
| 704 | callback_t callback, |
| 705 | void *data) |
| 706 | { |
| 707 | asection *s; |
| 708 | struct wildcard_list *sec0 = ptr->handler_data[0]; |
| 709 | struct wildcard_list *sec1 = ptr->handler_data[1]; |
| 710 | struct wildcard_list *wildsec2 = ptr->handler_data[2]; |
| 711 | struct wildcard_list *wildsec3 = ptr->handler_data[3]; |
| 712 | bfd_boolean multiple_sections_found; |
| 713 | asection *s0 = find_section (file, sec0, &multiple_sections_found), *s1; |
| 714 | |
| 715 | if (multiple_sections_found) |
| 716 | { |
| 717 | walk_wild_section_general (ptr, file, callback, data); |
| 718 | return; |
| 719 | } |
| 720 | |
| 721 | s1 = find_section (file, sec1, &multiple_sections_found); |
| 722 | if (multiple_sections_found) |
| 723 | { |
| 724 | walk_wild_section_general (ptr, file, callback, data); |
| 725 | return; |
| 726 | } |
| 727 | |
| 728 | for (s = file->the_bfd->sections; s != NULL; s = s->next) |
| 729 | { |
| 730 | if (s == s0) |
| 731 | walk_wild_consider_section (ptr, file, s, sec0, callback, data); |
| 732 | else |
| 733 | if (s == s1) |
| 734 | walk_wild_consider_section (ptr, file, s, sec1, callback, data); |
| 735 | else |
| 736 | { |
| 737 | const char *sname = bfd_get_section_name (file->the_bfd, s); |
| 738 | bfd_boolean skip = !match_simple_wild (wildsec2->spec.name, |
| 739 | sname); |
| 740 | |
| 741 | if (!skip) |
| 742 | walk_wild_consider_section (ptr, file, s, wildsec2, callback, |
| 743 | data); |
| 744 | else |
| 745 | { |
| 746 | skip = !match_simple_wild (wildsec3->spec.name, sname); |
| 747 | if (!skip) |
| 748 | walk_wild_consider_section (ptr, file, s, wildsec3, |
| 749 | callback, data); |
| 750 | } |
| 751 | } |
| 752 | } |
| 753 | } |
| 754 | |
| 755 | static void |
| 756 | walk_wild_section (lang_wild_statement_type *ptr, |
| 757 | lang_input_statement_type *file, |
| 758 | callback_t callback, |
| 759 | void *data) |
| 760 | { |
| 761 | if (file->flags.just_syms) |
| 762 | return; |
| 763 | |
| 764 | (*ptr->walk_wild_section_handler) (ptr, file, callback, data); |
| 765 | } |
| 766 | |
| 767 | /* Returns TRUE when name1 is a wildcard spec that might match |
| 768 | something name2 can match. We're conservative: we return FALSE |
| 769 | only if the prefixes of name1 and name2 are different up to the |
| 770 | first wildcard character. */ |
| 771 | |
| 772 | static bfd_boolean |
| 773 | wild_spec_can_overlap (const char *name1, const char *name2) |
| 774 | { |
| 775 | size_t prefix1_len = strcspn (name1, "?*["); |
| 776 | size_t prefix2_len = strcspn (name2, "?*["); |
| 777 | size_t min_prefix_len; |
| 778 | |
| 779 | /* Note that if there is no wildcard character, then we treat the |
| 780 | terminating 0 as part of the prefix. Thus ".text" won't match |
| 781 | ".text." or ".text.*", for example. */ |
| 782 | if (name1[prefix1_len] == '\0') |
| 783 | prefix1_len++; |
| 784 | if (name2[prefix2_len] == '\0') |
| 785 | prefix2_len++; |
| 786 | |
| 787 | min_prefix_len = prefix1_len < prefix2_len ? prefix1_len : prefix2_len; |
| 788 | |
| 789 | return memcmp (name1, name2, min_prefix_len) == 0; |
| 790 | } |
| 791 | |
| 792 | /* Select specialized code to handle various kinds of wildcard |
| 793 | statements. */ |
| 794 | |
| 795 | static void |
| 796 | analyze_walk_wild_section_handler (lang_wild_statement_type *ptr) |
| 797 | { |
| 798 | int sec_count = 0; |
| 799 | int wild_name_count = 0; |
| 800 | struct wildcard_list *sec; |
| 801 | int signature; |
| 802 | int data_counter; |
| 803 | |
| 804 | ptr->walk_wild_section_handler = walk_wild_section_general; |
| 805 | ptr->handler_data[0] = NULL; |
| 806 | ptr->handler_data[1] = NULL; |
| 807 | ptr->handler_data[2] = NULL; |
| 808 | ptr->handler_data[3] = NULL; |
| 809 | ptr->tree = NULL; |
| 810 | |
| 811 | /* Count how many wildcard_specs there are, and how many of those |
| 812 | actually use wildcards in the name. Also, bail out if any of the |
| 813 | wildcard names are NULL. (Can this actually happen? |
| 814 | walk_wild_section used to test for it.) And bail out if any |
| 815 | of the wildcards are more complex than a simple string |
| 816 | ending in a single '*'. */ |
| 817 | for (sec = ptr->section_list; sec != NULL; sec = sec->next) |
| 818 | { |
| 819 | ++sec_count; |
| 820 | if (sec->spec.name == NULL) |
| 821 | return; |
| 822 | if (wildcardp (sec->spec.name)) |
| 823 | { |
| 824 | ++wild_name_count; |
| 825 | if (!is_simple_wild (sec->spec.name)) |
| 826 | return; |
| 827 | } |
| 828 | } |
| 829 | |
| 830 | /* The zero-spec case would be easy to optimize but it doesn't |
| 831 | happen in practice. Likewise, more than 4 specs doesn't |
| 832 | happen in practice. */ |
| 833 | if (sec_count == 0 || sec_count > 4) |
| 834 | return; |
| 835 | |
| 836 | /* Check that no two specs can match the same section. */ |
| 837 | for (sec = ptr->section_list; sec != NULL; sec = sec->next) |
| 838 | { |
| 839 | struct wildcard_list *sec2; |
| 840 | for (sec2 = sec->next; sec2 != NULL; sec2 = sec2->next) |
| 841 | { |
| 842 | if (wild_spec_can_overlap (sec->spec.name, sec2->spec.name)) |
| 843 | return; |
| 844 | } |
| 845 | } |
| 846 | |
| 847 | signature = (sec_count << 8) + wild_name_count; |
| 848 | switch (signature) |
| 849 | { |
| 850 | case 0x0100: |
| 851 | ptr->walk_wild_section_handler = walk_wild_section_specs1_wild0; |
| 852 | break; |
| 853 | case 0x0101: |
| 854 | ptr->walk_wild_section_handler = walk_wild_section_specs1_wild1; |
| 855 | break; |
| 856 | case 0x0201: |
| 857 | ptr->walk_wild_section_handler = walk_wild_section_specs2_wild1; |
| 858 | break; |
| 859 | case 0x0302: |
| 860 | ptr->walk_wild_section_handler = walk_wild_section_specs3_wild2; |
| 861 | break; |
| 862 | case 0x0402: |
| 863 | ptr->walk_wild_section_handler = walk_wild_section_specs4_wild2; |
| 864 | break; |
| 865 | default: |
| 866 | return; |
| 867 | } |
| 868 | |
| 869 | /* Now fill the data array with pointers to the specs, first the |
| 870 | specs with non-wildcard names, then the specs with wildcard |
| 871 | names. It's OK to process the specs in different order from the |
| 872 | given order, because we've already determined that no section |
| 873 | will match more than one spec. */ |
| 874 | data_counter = 0; |
| 875 | for (sec = ptr->section_list; sec != NULL; sec = sec->next) |
| 876 | if (!wildcardp (sec->spec.name)) |
| 877 | ptr->handler_data[data_counter++] = sec; |
| 878 | for (sec = ptr->section_list; sec != NULL; sec = sec->next) |
| 879 | if (wildcardp (sec->spec.name)) |
| 880 | ptr->handler_data[data_counter++] = sec; |
| 881 | } |
| 882 | |
| 883 | /* Handle a wild statement for a single file F. */ |
| 884 | |
| 885 | static void |
| 886 | walk_wild_file (lang_wild_statement_type *s, |
| 887 | lang_input_statement_type *f, |
| 888 | callback_t callback, |
| 889 | void *data) |
| 890 | { |
| 891 | if (walk_wild_file_in_exclude_list (s->exclude_name_list, f)) |
| 892 | return; |
| 893 | |
| 894 | if (f->the_bfd == NULL |
| 895 | || !bfd_check_format (f->the_bfd, bfd_archive)) |
| 896 | walk_wild_section (s, f, callback, data); |
| 897 | else |
| 898 | { |
| 899 | bfd *member; |
| 900 | |
| 901 | /* This is an archive file. We must map each member of the |
| 902 | archive separately. */ |
| 903 | member = bfd_openr_next_archived_file (f->the_bfd, NULL); |
| 904 | while (member != NULL) |
| 905 | { |
| 906 | /* When lookup_name is called, it will call the add_symbols |
| 907 | entry point for the archive. For each element of the |
| 908 | archive which is included, BFD will call ldlang_add_file, |
| 909 | which will set the usrdata field of the member to the |
| 910 | lang_input_statement. */ |
| 911 | if (member->usrdata != NULL) |
| 912 | { |
| 913 | walk_wild_section (s, |
| 914 | (lang_input_statement_type *) member->usrdata, |
| 915 | callback, data); |
| 916 | } |
| 917 | |
| 918 | member = bfd_openr_next_archived_file (f->the_bfd, member); |
| 919 | } |
| 920 | } |
| 921 | } |
| 922 | |
| 923 | static void |
| 924 | walk_wild (lang_wild_statement_type *s, callback_t callback, void *data) |
| 925 | { |
| 926 | const char *file_spec = s->filename; |
| 927 | char *p; |
| 928 | |
| 929 | if (file_spec == NULL) |
| 930 | { |
| 931 | /* Perform the iteration over all files in the list. */ |
| 932 | LANG_FOR_EACH_INPUT_STATEMENT (f) |
| 933 | { |
| 934 | walk_wild_file (s, f, callback, data); |
| 935 | } |
| 936 | } |
| 937 | else if ((p = archive_path (file_spec)) != NULL) |
| 938 | { |
| 939 | LANG_FOR_EACH_INPUT_STATEMENT (f) |
| 940 | { |
| 941 | if (input_statement_is_archive_path (file_spec, p, f)) |
| 942 | walk_wild_file (s, f, callback, data); |
| 943 | } |
| 944 | } |
| 945 | else if (wildcardp (file_spec)) |
| 946 | { |
| 947 | LANG_FOR_EACH_INPUT_STATEMENT (f) |
| 948 | { |
| 949 | if (fnmatch (file_spec, f->filename, 0) == 0) |
| 950 | walk_wild_file (s, f, callback, data); |
| 951 | } |
| 952 | } |
| 953 | else |
| 954 | { |
| 955 | lang_input_statement_type *f; |
| 956 | |
| 957 | /* Perform the iteration over a single file. */ |
| 958 | f = lookup_name (file_spec); |
| 959 | if (f) |
| 960 | walk_wild_file (s, f, callback, data); |
| 961 | } |
| 962 | } |
| 963 | |
| 964 | /* lang_for_each_statement walks the parse tree and calls the provided |
| 965 | function for each node, except those inside output section statements |
| 966 | with constraint set to -1. */ |
| 967 | |
| 968 | void |
| 969 | lang_for_each_statement_worker (void (*func) (lang_statement_union_type *), |
| 970 | lang_statement_union_type *s) |
| 971 | { |
| 972 | for (; s != NULL; s = s->header.next) |
| 973 | { |
| 974 | func (s); |
| 975 | |
| 976 | switch (s->header.type) |
| 977 | { |
| 978 | case lang_constructors_statement_enum: |
| 979 | lang_for_each_statement_worker (func, constructor_list.head); |
| 980 | break; |
| 981 | case lang_output_section_statement_enum: |
| 982 | if (s->output_section_statement.constraint != -1) |
| 983 | lang_for_each_statement_worker |
| 984 | (func, s->output_section_statement.children.head); |
| 985 | break; |
| 986 | case lang_wild_statement_enum: |
| 987 | lang_for_each_statement_worker (func, |
| 988 | s->wild_statement.children.head); |
| 989 | break; |
| 990 | case lang_group_statement_enum: |
| 991 | lang_for_each_statement_worker (func, |
| 992 | s->group_statement.children.head); |
| 993 | break; |
| 994 | case lang_data_statement_enum: |
| 995 | case lang_reloc_statement_enum: |
| 996 | case lang_object_symbols_statement_enum: |
| 997 | case lang_output_statement_enum: |
| 998 | case lang_target_statement_enum: |
| 999 | case lang_input_section_enum: |
| 1000 | case lang_input_statement_enum: |
| 1001 | case lang_assignment_statement_enum: |
| 1002 | case lang_padding_statement_enum: |
| 1003 | case lang_address_statement_enum: |
| 1004 | case lang_fill_statement_enum: |
| 1005 | case lang_insert_statement_enum: |
| 1006 | break; |
| 1007 | default: |
| 1008 | FAIL (); |
| 1009 | break; |
| 1010 | } |
| 1011 | } |
| 1012 | } |
| 1013 | |
| 1014 | void |
| 1015 | lang_for_each_statement (void (*func) (lang_statement_union_type *)) |
| 1016 | { |
| 1017 | lang_for_each_statement_worker (func, statement_list.head); |
| 1018 | } |
| 1019 | |
| 1020 | /*----------------------------------------------------------------------*/ |
| 1021 | |
| 1022 | void |
| 1023 | lang_list_init (lang_statement_list_type *list) |
| 1024 | { |
| 1025 | list->head = NULL; |
| 1026 | list->tail = &list->head; |
| 1027 | } |
| 1028 | |
| 1029 | void |
| 1030 | push_stat_ptr (lang_statement_list_type *new_ptr) |
| 1031 | { |
| 1032 | if (stat_save_ptr >= stat_save + sizeof (stat_save) / sizeof (stat_save[0])) |
| 1033 | abort (); |
| 1034 | *stat_save_ptr++ = stat_ptr; |
| 1035 | stat_ptr = new_ptr; |
| 1036 | } |
| 1037 | |
| 1038 | void |
| 1039 | pop_stat_ptr (void) |
| 1040 | { |
| 1041 | if (stat_save_ptr <= stat_save) |
| 1042 | abort (); |
| 1043 | stat_ptr = *--stat_save_ptr; |
| 1044 | } |
| 1045 | |
| 1046 | /* Build a new statement node for the parse tree. */ |
| 1047 | |
| 1048 | static lang_statement_union_type * |
| 1049 | new_statement (enum statement_enum type, |
| 1050 | size_t size, |
| 1051 | lang_statement_list_type *list) |
| 1052 | { |
| 1053 | lang_statement_union_type *new_stmt; |
| 1054 | |
| 1055 | new_stmt = (lang_statement_union_type *) stat_alloc (size); |
| 1056 | new_stmt->header.type = type; |
| 1057 | new_stmt->header.next = NULL; |
| 1058 | lang_statement_append (list, new_stmt, &new_stmt->header.next); |
| 1059 | return new_stmt; |
| 1060 | } |
| 1061 | |
| 1062 | /* Build a new input file node for the language. There are several |
| 1063 | ways in which we treat an input file, eg, we only look at symbols, |
| 1064 | or prefix it with a -l etc. |
| 1065 | |
| 1066 | We can be supplied with requests for input files more than once; |
| 1067 | they may, for example be split over several lines like foo.o(.text) |
| 1068 | foo.o(.data) etc, so when asked for a file we check that we haven't |
| 1069 | got it already so we don't duplicate the bfd. */ |
| 1070 | |
| 1071 | static lang_input_statement_type * |
| 1072 | new_afile (const char *name, |
| 1073 | lang_input_file_enum_type file_type, |
| 1074 | const char *target, |
| 1075 | bfd_boolean add_to_list) |
| 1076 | { |
| 1077 | lang_input_statement_type *p; |
| 1078 | |
| 1079 | lang_has_input_file = TRUE; |
| 1080 | |
| 1081 | if (add_to_list) |
| 1082 | p = (lang_input_statement_type *) new_stat (lang_input_statement, stat_ptr); |
| 1083 | else |
| 1084 | { |
| 1085 | p = (lang_input_statement_type *) |
| 1086 | stat_alloc (sizeof (lang_input_statement_type)); |
| 1087 | p->header.type = lang_input_statement_enum; |
| 1088 | p->header.next = NULL; |
| 1089 | } |
| 1090 | |
| 1091 | memset (&p->the_bfd, 0, |
| 1092 | sizeof (*p) - offsetof (lang_input_statement_type, the_bfd)); |
| 1093 | p->target = target; |
| 1094 | p->flags.dynamic = input_flags.dynamic; |
| 1095 | p->flags.add_DT_NEEDED_for_dynamic = input_flags.add_DT_NEEDED_for_dynamic; |
| 1096 | p->flags.add_DT_NEEDED_for_regular = input_flags.add_DT_NEEDED_for_regular; |
| 1097 | p->flags.whole_archive = input_flags.whole_archive; |
| 1098 | p->flags.sysrooted = input_flags.sysrooted; |
| 1099 | |
| 1100 | switch (file_type) |
| 1101 | { |
| 1102 | case lang_input_file_is_symbols_only_enum: |
| 1103 | p->filename = name; |
| 1104 | p->local_sym_name = name; |
| 1105 | p->flags.real = TRUE; |
| 1106 | p->flags.just_syms = TRUE; |
| 1107 | break; |
| 1108 | case lang_input_file_is_fake_enum: |
| 1109 | p->filename = name; |
| 1110 | p->local_sym_name = name; |
| 1111 | break; |
| 1112 | case lang_input_file_is_l_enum: |
| 1113 | if (name[0] == ':' && name[1] != '\0') |
| 1114 | { |
| 1115 | p->filename = name + 1; |
| 1116 | p->flags.full_name_provided = TRUE; |
| 1117 | } |
| 1118 | else |
| 1119 | p->filename = name; |
| 1120 | p->local_sym_name = concat ("-l", name, (const char *) NULL); |
| 1121 | p->flags.maybe_archive = TRUE; |
| 1122 | p->flags.real = TRUE; |
| 1123 | p->flags.search_dirs = TRUE; |
| 1124 | break; |
| 1125 | case lang_input_file_is_marker_enum: |
| 1126 | p->filename = name; |
| 1127 | p->local_sym_name = name; |
| 1128 | p->flags.search_dirs = TRUE; |
| 1129 | break; |
| 1130 | case lang_input_file_is_search_file_enum: |
| 1131 | p->filename = name; |
| 1132 | p->local_sym_name = name; |
| 1133 | p->flags.real = TRUE; |
| 1134 | p->flags.search_dirs = TRUE; |
| 1135 | break; |
| 1136 | case lang_input_file_is_file_enum: |
| 1137 | p->filename = name; |
| 1138 | p->local_sym_name = name; |
| 1139 | p->flags.real = TRUE; |
| 1140 | break; |
| 1141 | default: |
| 1142 | FAIL (); |
| 1143 | } |
| 1144 | |
| 1145 | lang_statement_append (&input_file_chain, |
| 1146 | (lang_statement_union_type *) p, |
| 1147 | &p->next_real_file); |
| 1148 | return p; |
| 1149 | } |
| 1150 | |
| 1151 | lang_input_statement_type * |
| 1152 | lang_add_input_file (const char *name, |
| 1153 | lang_input_file_enum_type file_type, |
| 1154 | const char *target) |
| 1155 | { |
| 1156 | if (name != NULL |
| 1157 | && (*name == '=' || CONST_STRNEQ (name, "$SYSROOT"))) |
| 1158 | { |
| 1159 | lang_input_statement_type *ret; |
| 1160 | char *sysrooted_name |
| 1161 | = concat (ld_sysroot, |
| 1162 | name + (*name == '=' ? 1 : strlen ("$SYSROOT")), |
| 1163 | (const char *) NULL); |
| 1164 | |
| 1165 | /* We've now forcibly prepended the sysroot, making the input |
| 1166 | file independent of the context. Therefore, temporarily |
| 1167 | force a non-sysrooted context for this statement, so it won't |
| 1168 | get the sysroot prepended again when opened. (N.B. if it's a |
| 1169 | script, any child nodes with input files starting with "/" |
| 1170 | will be handled as "sysrooted" as they'll be found to be |
| 1171 | within the sysroot subdirectory.) */ |
| 1172 | unsigned int outer_sysrooted = input_flags.sysrooted; |
| 1173 | input_flags.sysrooted = 0; |
| 1174 | ret = new_afile (sysrooted_name, file_type, target, TRUE); |
| 1175 | input_flags.sysrooted = outer_sysrooted; |
| 1176 | return ret; |
| 1177 | } |
| 1178 | |
| 1179 | return new_afile (name, file_type, target, TRUE); |
| 1180 | } |
| 1181 | |
| 1182 | struct out_section_hash_entry |
| 1183 | { |
| 1184 | struct bfd_hash_entry root; |
| 1185 | lang_statement_union_type s; |
| 1186 | }; |
| 1187 | |
| 1188 | /* The hash table. */ |
| 1189 | |
| 1190 | static struct bfd_hash_table output_section_statement_table; |
| 1191 | |
| 1192 | /* Support routines for the hash table used by lang_output_section_find, |
| 1193 | initialize the table, fill in an entry and remove the table. */ |
| 1194 | |
| 1195 | static struct bfd_hash_entry * |
| 1196 | output_section_statement_newfunc (struct bfd_hash_entry *entry, |
| 1197 | struct bfd_hash_table *table, |
| 1198 | const char *string) |
| 1199 | { |
| 1200 | lang_output_section_statement_type **nextp; |
| 1201 | struct out_section_hash_entry *ret; |
| 1202 | |
| 1203 | if (entry == NULL) |
| 1204 | { |
| 1205 | entry = (struct bfd_hash_entry *) bfd_hash_allocate (table, |
| 1206 | sizeof (*ret)); |
| 1207 | if (entry == NULL) |
| 1208 | return entry; |
| 1209 | } |
| 1210 | |
| 1211 | entry = bfd_hash_newfunc (entry, table, string); |
| 1212 | if (entry == NULL) |
| 1213 | return entry; |
| 1214 | |
| 1215 | ret = (struct out_section_hash_entry *) entry; |
| 1216 | memset (&ret->s, 0, sizeof (ret->s)); |
| 1217 | ret->s.header.type = lang_output_section_statement_enum; |
| 1218 | ret->s.output_section_statement.subsection_alignment = NULL; |
| 1219 | ret->s.output_section_statement.section_alignment = NULL; |
| 1220 | ret->s.output_section_statement.block_value = 1; |
| 1221 | lang_list_init (&ret->s.output_section_statement.children); |
| 1222 | lang_statement_append (stat_ptr, &ret->s, &ret->s.header.next); |
| 1223 | |
| 1224 | /* For every output section statement added to the list, except the |
| 1225 | first one, lang_output_section_statement.tail points to the "next" |
| 1226 | field of the last element of the list. */ |
| 1227 | if (lang_output_section_statement.head != NULL) |
| 1228 | ret->s.output_section_statement.prev |
| 1229 | = ((lang_output_section_statement_type *) |
| 1230 | ((char *) lang_output_section_statement.tail |
| 1231 | - offsetof (lang_output_section_statement_type, next))); |
| 1232 | |
| 1233 | /* GCC's strict aliasing rules prevent us from just casting the |
| 1234 | address, so we store the pointer in a variable and cast that |
| 1235 | instead. */ |
| 1236 | nextp = &ret->s.output_section_statement.next; |
| 1237 | lang_statement_append (&lang_output_section_statement, |
| 1238 | &ret->s, |
| 1239 | (lang_statement_union_type **) nextp); |
| 1240 | return &ret->root; |
| 1241 | } |
| 1242 | |
| 1243 | static void |
| 1244 | output_section_statement_table_init (void) |
| 1245 | { |
| 1246 | if (!bfd_hash_table_init_n (&output_section_statement_table, |
| 1247 | output_section_statement_newfunc, |
| 1248 | sizeof (struct out_section_hash_entry), |
| 1249 | 61)) |
| 1250 | einfo (_("%F%P: can not create hash table: %E\n")); |
| 1251 | } |
| 1252 | |
| 1253 | static void |
| 1254 | output_section_statement_table_free (void) |
| 1255 | { |
| 1256 | bfd_hash_table_free (&output_section_statement_table); |
| 1257 | } |
| 1258 | |
| 1259 | /* Build enough state so that the parser can build its tree. */ |
| 1260 | |
| 1261 | void |
| 1262 | lang_init (void) |
| 1263 | { |
| 1264 | obstack_begin (&stat_obstack, 1000); |
| 1265 | |
| 1266 | stat_ptr = &statement_list; |
| 1267 | |
| 1268 | output_section_statement_table_init (); |
| 1269 | |
| 1270 | lang_list_init (stat_ptr); |
| 1271 | |
| 1272 | lang_list_init (&input_file_chain); |
| 1273 | lang_list_init (&lang_output_section_statement); |
| 1274 | lang_list_init (&file_chain); |
| 1275 | first_file = lang_add_input_file (NULL, lang_input_file_is_marker_enum, |
| 1276 | NULL); |
| 1277 | abs_output_section = |
| 1278 | lang_output_section_statement_lookup (BFD_ABS_SECTION_NAME, 0, TRUE); |
| 1279 | |
| 1280 | abs_output_section->bfd_section = bfd_abs_section_ptr; |
| 1281 | |
| 1282 | asneeded_list_head = NULL; |
| 1283 | asneeded_list_tail = &asneeded_list_head; |
| 1284 | } |
| 1285 | |
| 1286 | void |
| 1287 | lang_finish (void) |
| 1288 | { |
| 1289 | output_section_statement_table_free (); |
| 1290 | } |
| 1291 | |
| 1292 | /*---------------------------------------------------------------------- |
| 1293 | A region is an area of memory declared with the |
| 1294 | MEMORY { name:org=exp, len=exp ... } |
| 1295 | syntax. |
| 1296 | |
| 1297 | We maintain a list of all the regions here. |
| 1298 | |
| 1299 | If no regions are specified in the script, then the default is used |
| 1300 | which is created when looked up to be the entire data space. |
| 1301 | |
| 1302 | If create is true we are creating a region inside a MEMORY block. |
| 1303 | In this case it is probably an error to create a region that has |
| 1304 | already been created. If we are not inside a MEMORY block it is |
| 1305 | dubious to use an undeclared region name (except DEFAULT_MEMORY_REGION) |
| 1306 | and so we issue a warning. |
| 1307 | |
| 1308 | Each region has at least one name. The first name is either |
| 1309 | DEFAULT_MEMORY_REGION or the name given in the MEMORY block. You can add |
| 1310 | alias names to an existing region within a script with |
| 1311 | REGION_ALIAS (alias, region_name). Each name corresponds to at most one |
| 1312 | region. */ |
| 1313 | |
| 1314 | static lang_memory_region_type *lang_memory_region_list; |
| 1315 | static lang_memory_region_type **lang_memory_region_list_tail |
| 1316 | = &lang_memory_region_list; |
| 1317 | |
| 1318 | lang_memory_region_type * |
| 1319 | lang_memory_region_lookup (const char *const name, bfd_boolean create) |
| 1320 | { |
| 1321 | lang_memory_region_name *n; |
| 1322 | lang_memory_region_type *r; |
| 1323 | lang_memory_region_type *new_region; |
| 1324 | |
| 1325 | /* NAME is NULL for LMA memspecs if no region was specified. */ |
| 1326 | if (name == NULL) |
| 1327 | return NULL; |
| 1328 | |
| 1329 | for (r = lang_memory_region_list; r != NULL; r = r->next) |
| 1330 | for (n = &r->name_list; n != NULL; n = n->next) |
| 1331 | if (strcmp (n->name, name) == 0) |
| 1332 | { |
| 1333 | if (create) |
| 1334 | einfo (_("%P:%pS: warning: redeclaration of memory region `%s'\n"), |
| 1335 | NULL, name); |
| 1336 | return r; |
| 1337 | } |
| 1338 | |
| 1339 | if (!create && strcmp (name, DEFAULT_MEMORY_REGION)) |
| 1340 | einfo (_("%P:%pS: warning: memory region `%s' not declared\n"), |
| 1341 | NULL, name); |
| 1342 | |
| 1343 | new_region = (lang_memory_region_type *) |
| 1344 | stat_alloc (sizeof (lang_memory_region_type)); |
| 1345 | |
| 1346 | new_region->name_list.name = xstrdup (name); |
| 1347 | new_region->name_list.next = NULL; |
| 1348 | new_region->next = NULL; |
| 1349 | new_region->origin_exp = NULL; |
| 1350 | new_region->origin = 0; |
| 1351 | new_region->length_exp = NULL; |
| 1352 | new_region->length = ~(bfd_size_type) 0; |
| 1353 | new_region->current = 0; |
| 1354 | new_region->last_os = NULL; |
| 1355 | new_region->flags = 0; |
| 1356 | new_region->not_flags = 0; |
| 1357 | new_region->had_full_message = FALSE; |
| 1358 | |
| 1359 | *lang_memory_region_list_tail = new_region; |
| 1360 | lang_memory_region_list_tail = &new_region->next; |
| 1361 | |
| 1362 | return new_region; |
| 1363 | } |
| 1364 | |
| 1365 | void |
| 1366 | lang_memory_region_alias (const char *alias, const char *region_name) |
| 1367 | { |
| 1368 | lang_memory_region_name *n; |
| 1369 | lang_memory_region_type *r; |
| 1370 | lang_memory_region_type *region; |
| 1371 | |
| 1372 | /* The default region must be unique. This ensures that it is not necessary |
| 1373 | to iterate through the name list if someone wants the check if a region is |
| 1374 | the default memory region. */ |
| 1375 | if (strcmp (region_name, DEFAULT_MEMORY_REGION) == 0 |
| 1376 | || strcmp (alias, DEFAULT_MEMORY_REGION) == 0) |
| 1377 | einfo (_("%F%P:%pS: error: alias for default memory region\n"), NULL); |
| 1378 | |
| 1379 | /* Look for the target region and check if the alias is not already |
| 1380 | in use. */ |
| 1381 | region = NULL; |
| 1382 | for (r = lang_memory_region_list; r != NULL; r = r->next) |
| 1383 | for (n = &r->name_list; n != NULL; n = n->next) |
| 1384 | { |
| 1385 | if (region == NULL && strcmp (n->name, region_name) == 0) |
| 1386 | region = r; |
| 1387 | if (strcmp (n->name, alias) == 0) |
| 1388 | einfo (_("%F%P:%pS: error: redefinition of memory region " |
| 1389 | "alias `%s'\n"), |
| 1390 | NULL, alias); |
| 1391 | } |
| 1392 | |
| 1393 | /* Check if the target region exists. */ |
| 1394 | if (region == NULL) |
| 1395 | einfo (_("%F%P:%pS: error: memory region `%s' " |
| 1396 | "for alias `%s' does not exist\n"), |
| 1397 | NULL, region_name, alias); |
| 1398 | |
| 1399 | /* Add alias to region name list. */ |
| 1400 | n = (lang_memory_region_name *) stat_alloc (sizeof (lang_memory_region_name)); |
| 1401 | n->name = xstrdup (alias); |
| 1402 | n->next = region->name_list.next; |
| 1403 | region->name_list.next = n; |
| 1404 | } |
| 1405 | |
| 1406 | static lang_memory_region_type * |
| 1407 | lang_memory_default (asection *section) |
| 1408 | { |
| 1409 | lang_memory_region_type *p; |
| 1410 | |
| 1411 | flagword sec_flags = section->flags; |
| 1412 | |
| 1413 | /* Override SEC_DATA to mean a writable section. */ |
| 1414 | if ((sec_flags & (SEC_ALLOC | SEC_READONLY | SEC_CODE)) == SEC_ALLOC) |
| 1415 | sec_flags |= SEC_DATA; |
| 1416 | |
| 1417 | for (p = lang_memory_region_list; p != NULL; p = p->next) |
| 1418 | { |
| 1419 | if ((p->flags & sec_flags) != 0 |
| 1420 | && (p->not_flags & sec_flags) == 0) |
| 1421 | { |
| 1422 | return p; |
| 1423 | } |
| 1424 | } |
| 1425 | return lang_memory_region_lookup (DEFAULT_MEMORY_REGION, FALSE); |
| 1426 | } |
| 1427 | |
| 1428 | /* Get the output section statement directly from the userdata. */ |
| 1429 | |
| 1430 | lang_output_section_statement_type * |
| 1431 | lang_output_section_get (const asection *output_section) |
| 1432 | { |
| 1433 | return get_userdata (output_section); |
| 1434 | } |
| 1435 | |
| 1436 | /* Find or create an output_section_statement with the given NAME. |
| 1437 | If CONSTRAINT is non-zero match one with that constraint, otherwise |
| 1438 | match any non-negative constraint. If CREATE, always make a |
| 1439 | new output_section_statement for SPECIAL CONSTRAINT. */ |
| 1440 | |
| 1441 | lang_output_section_statement_type * |
| 1442 | lang_output_section_statement_lookup (const char *name, |
| 1443 | int constraint, |
| 1444 | bfd_boolean create) |
| 1445 | { |
| 1446 | struct out_section_hash_entry *entry; |
| 1447 | |
| 1448 | entry = ((struct out_section_hash_entry *) |
| 1449 | bfd_hash_lookup (&output_section_statement_table, name, |
| 1450 | create, FALSE)); |
| 1451 | if (entry == NULL) |
| 1452 | { |
| 1453 | if (create) |
| 1454 | einfo (_("%F%P: failed creating section `%s': %E\n"), name); |
| 1455 | return NULL; |
| 1456 | } |
| 1457 | |
| 1458 | if (entry->s.output_section_statement.name != NULL) |
| 1459 | { |
| 1460 | /* We have a section of this name, but it might not have the correct |
| 1461 | constraint. */ |
| 1462 | struct out_section_hash_entry *last_ent; |
| 1463 | |
| 1464 | name = entry->s.output_section_statement.name; |
| 1465 | if (create && constraint == SPECIAL) |
| 1466 | /* Not traversing to the end reverses the order of the second |
| 1467 | and subsequent SPECIAL sections in the hash table chain, |
| 1468 | but that shouldn't matter. */ |
| 1469 | last_ent = entry; |
| 1470 | else |
| 1471 | do |
| 1472 | { |
| 1473 | if (constraint == entry->s.output_section_statement.constraint |
| 1474 | || (constraint == 0 |
| 1475 | && entry->s.output_section_statement.constraint >= 0)) |
| 1476 | return &entry->s.output_section_statement; |
| 1477 | last_ent = entry; |
| 1478 | entry = (struct out_section_hash_entry *) entry->root.next; |
| 1479 | } |
| 1480 | while (entry != NULL |
| 1481 | && name == entry->s.output_section_statement.name); |
| 1482 | |
| 1483 | if (!create) |
| 1484 | return NULL; |
| 1485 | |
| 1486 | entry |
| 1487 | = ((struct out_section_hash_entry *) |
| 1488 | output_section_statement_newfunc (NULL, |
| 1489 | &output_section_statement_table, |
| 1490 | name)); |
| 1491 | if (entry == NULL) |
| 1492 | { |
| 1493 | einfo (_("%F%P: failed creating section `%s': %E\n"), name); |
| 1494 | return NULL; |
| 1495 | } |
| 1496 | entry->root = last_ent->root; |
| 1497 | last_ent->root.next = &entry->root; |
| 1498 | } |
| 1499 | |
| 1500 | entry->s.output_section_statement.name = name; |
| 1501 | entry->s.output_section_statement.constraint = constraint; |
| 1502 | return &entry->s.output_section_statement; |
| 1503 | } |
| 1504 | |
| 1505 | /* Find the next output_section_statement with the same name as OS. |
| 1506 | If CONSTRAINT is non-zero, find one with that constraint otherwise |
| 1507 | match any non-negative constraint. */ |
| 1508 | |
| 1509 | lang_output_section_statement_type * |
| 1510 | next_matching_output_section_statement (lang_output_section_statement_type *os, |
| 1511 | int constraint) |
| 1512 | { |
| 1513 | /* All output_section_statements are actually part of a |
| 1514 | struct out_section_hash_entry. */ |
| 1515 | struct out_section_hash_entry *entry = (struct out_section_hash_entry *) |
| 1516 | ((char *) os |
| 1517 | - offsetof (struct out_section_hash_entry, s.output_section_statement)); |
| 1518 | const char *name = os->name; |
| 1519 | |
| 1520 | ASSERT (name == entry->root.string); |
| 1521 | do |
| 1522 | { |
| 1523 | entry = (struct out_section_hash_entry *) entry->root.next; |
| 1524 | if (entry == NULL |
| 1525 | || name != entry->s.output_section_statement.name) |
| 1526 | return NULL; |
| 1527 | } |
| 1528 | while (constraint != entry->s.output_section_statement.constraint |
| 1529 | && (constraint != 0 |
| 1530 | || entry->s.output_section_statement.constraint < 0)); |
| 1531 | |
| 1532 | return &entry->s.output_section_statement; |
| 1533 | } |
| 1534 | |
| 1535 | /* A variant of lang_output_section_find used by place_orphan. |
| 1536 | Returns the output statement that should precede a new output |
| 1537 | statement for SEC. If an exact match is found on certain flags, |
| 1538 | sets *EXACT too. */ |
| 1539 | |
| 1540 | lang_output_section_statement_type * |
| 1541 | lang_output_section_find_by_flags (const asection *sec, |
| 1542 | flagword sec_flags, |
| 1543 | lang_output_section_statement_type **exact, |
| 1544 | lang_match_sec_type_func match_type) |
| 1545 | { |
| 1546 | lang_output_section_statement_type *first, *look, *found; |
| 1547 | flagword look_flags, differ; |
| 1548 | |
| 1549 | /* We know the first statement on this list is *ABS*. May as well |
| 1550 | skip it. */ |
| 1551 | first = &lang_output_section_statement.head->output_section_statement; |
| 1552 | first = first->next; |
| 1553 | |
| 1554 | /* First try for an exact match. */ |
| 1555 | found = NULL; |
| 1556 | for (look = first; look; look = look->next) |
| 1557 | { |
| 1558 | look_flags = look->flags; |
| 1559 | if (look->bfd_section != NULL) |
| 1560 | { |
| 1561 | look_flags = look->bfd_section->flags; |
| 1562 | if (match_type && !match_type (link_info.output_bfd, |
| 1563 | look->bfd_section, |
| 1564 | sec->owner, sec)) |
| 1565 | continue; |
| 1566 | } |
| 1567 | differ = look_flags ^ sec_flags; |
| 1568 | if (!(differ & (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_READONLY |
| 1569 | | SEC_CODE | SEC_SMALL_DATA | SEC_THREAD_LOCAL))) |
| 1570 | found = look; |
| 1571 | } |
| 1572 | if (found != NULL) |
| 1573 | { |
| 1574 | if (exact != NULL) |
| 1575 | *exact = found; |
| 1576 | return found; |
| 1577 | } |
| 1578 | |
| 1579 | if ((sec_flags & SEC_CODE) != 0 |
| 1580 | && (sec_flags & SEC_ALLOC) != 0) |
| 1581 | { |
| 1582 | /* Try for a rw code section. */ |
| 1583 | for (look = first; look; look = look->next) |
| 1584 | { |
| 1585 | look_flags = look->flags; |
| 1586 | if (look->bfd_section != NULL) |
| 1587 | { |
| 1588 | look_flags = look->bfd_section->flags; |
| 1589 | if (match_type && !match_type (link_info.output_bfd, |
| 1590 | look->bfd_section, |
| 1591 | sec->owner, sec)) |
| 1592 | continue; |
| 1593 | } |
| 1594 | differ = look_flags ^ sec_flags; |
| 1595 | if (!(differ & (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD |
| 1596 | | SEC_CODE | SEC_SMALL_DATA | SEC_THREAD_LOCAL))) |
| 1597 | found = look; |
| 1598 | } |
| 1599 | } |
| 1600 | else if ((sec_flags & SEC_READONLY) != 0 |
| 1601 | && (sec_flags & SEC_ALLOC) != 0) |
| 1602 | { |
| 1603 | /* .rodata can go after .text, .sdata2 after .rodata. */ |
| 1604 | for (look = first; look; look = look->next) |
| 1605 | { |
| 1606 | look_flags = look->flags; |
| 1607 | if (look->bfd_section != NULL) |
| 1608 | { |
| 1609 | look_flags = look->bfd_section->flags; |
| 1610 | if (match_type && !match_type (link_info.output_bfd, |
| 1611 | look->bfd_section, |
| 1612 | sec->owner, sec)) |
| 1613 | continue; |
| 1614 | } |
| 1615 | differ = look_flags ^ sec_flags; |
| 1616 | if (!(differ & (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD |
| 1617 | | SEC_READONLY | SEC_SMALL_DATA)) |
| 1618 | || (!(differ & (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD |
| 1619 | | SEC_READONLY)) |
| 1620 | && !(look_flags & SEC_SMALL_DATA))) |
| 1621 | found = look; |
| 1622 | } |
| 1623 | } |
| 1624 | else if ((sec_flags & SEC_THREAD_LOCAL) != 0 |
| 1625 | && (sec_flags & SEC_ALLOC) != 0) |
| 1626 | { |
| 1627 | /* .tdata can go after .data, .tbss after .tdata. Treat .tbss |
| 1628 | as if it were a loaded section, and don't use match_type. */ |
| 1629 | bfd_boolean seen_thread_local = FALSE; |
| 1630 | |
| 1631 | match_type = NULL; |
| 1632 | for (look = first; look; look = look->next) |
| 1633 | { |
| 1634 | look_flags = look->flags; |
| 1635 | if (look->bfd_section != NULL) |
| 1636 | look_flags = look->bfd_section->flags; |
| 1637 | |
| 1638 | differ = look_flags ^ (sec_flags | SEC_LOAD | SEC_HAS_CONTENTS); |
| 1639 | if (!(differ & (SEC_THREAD_LOCAL | SEC_ALLOC))) |
| 1640 | { |
| 1641 | /* .tdata and .tbss must be adjacent and in that order. */ |
| 1642 | if (!(look_flags & SEC_LOAD) |
| 1643 | && (sec_flags & SEC_LOAD)) |
| 1644 | /* ..so if we're at a .tbss section and we're placing |
| 1645 | a .tdata section stop looking and return the |
| 1646 | previous section. */ |
| 1647 | break; |
| 1648 | found = look; |
| 1649 | seen_thread_local = TRUE; |
| 1650 | } |
| 1651 | else if (seen_thread_local) |
| 1652 | break; |
| 1653 | else if (!(differ & (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD))) |
| 1654 | found = look; |
| 1655 | } |
| 1656 | } |
| 1657 | else if ((sec_flags & SEC_SMALL_DATA) != 0 |
| 1658 | && (sec_flags & SEC_ALLOC) != 0) |
| 1659 | { |
| 1660 | /* .sdata goes after .data, .sbss after .sdata. */ |
| 1661 | for (look = first; look; look = look->next) |
| 1662 | { |
| 1663 | look_flags = look->flags; |
| 1664 | if (look->bfd_section != NULL) |
| 1665 | { |
| 1666 | look_flags = look->bfd_section->flags; |
| 1667 | if (match_type && !match_type (link_info.output_bfd, |
| 1668 | look->bfd_section, |
| 1669 | sec->owner, sec)) |
| 1670 | continue; |
| 1671 | } |
| 1672 | differ = look_flags ^ sec_flags; |
| 1673 | if (!(differ & (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD |
| 1674 | | SEC_THREAD_LOCAL)) |
| 1675 | || ((look_flags & SEC_SMALL_DATA) |
| 1676 | && !(sec_flags & SEC_HAS_CONTENTS))) |
| 1677 | found = look; |
| 1678 | } |
| 1679 | } |
| 1680 | else if ((sec_flags & SEC_HAS_CONTENTS) != 0 |
| 1681 | && (sec_flags & SEC_ALLOC) != 0) |
| 1682 | { |
| 1683 | /* .data goes after .rodata. */ |
| 1684 | for (look = first; look; look = look->next) |
| 1685 | { |
| 1686 | look_flags = look->flags; |
| 1687 | if (look->bfd_section != NULL) |
| 1688 | { |
| 1689 | look_flags = look->bfd_section->flags; |
| 1690 | if (match_type && !match_type (link_info.output_bfd, |
| 1691 | look->bfd_section, |
| 1692 | sec->owner, sec)) |
| 1693 | continue; |
| 1694 | } |
| 1695 | differ = look_flags ^ sec_flags; |
| 1696 | if (!(differ & (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD |
| 1697 | | SEC_SMALL_DATA | SEC_THREAD_LOCAL))) |
| 1698 | found = look; |
| 1699 | } |
| 1700 | } |
| 1701 | else if ((sec_flags & SEC_ALLOC) != 0) |
| 1702 | { |
| 1703 | /* .bss goes after any other alloc section. */ |
| 1704 | for (look = first; look; look = look->next) |
| 1705 | { |
| 1706 | look_flags = look->flags; |
| 1707 | if (look->bfd_section != NULL) |
| 1708 | { |
| 1709 | look_flags = look->bfd_section->flags; |
| 1710 | if (match_type && !match_type (link_info.output_bfd, |
| 1711 | look->bfd_section, |
| 1712 | sec->owner, sec)) |
| 1713 | continue; |
| 1714 | } |
| 1715 | differ = look_flags ^ sec_flags; |
| 1716 | if (!(differ & SEC_ALLOC)) |
| 1717 | found = look; |
| 1718 | } |
| 1719 | } |
| 1720 | else |
| 1721 | { |
| 1722 | /* non-alloc go last. */ |
| 1723 | for (look = first; look; look = look->next) |
| 1724 | { |
| 1725 | look_flags = look->flags; |
| 1726 | if (look->bfd_section != NULL) |
| 1727 | look_flags = look->bfd_section->flags; |
| 1728 | differ = look_flags ^ sec_flags; |
| 1729 | if (!(differ & SEC_DEBUGGING)) |
| 1730 | found = look; |
| 1731 | } |
| 1732 | return found; |
| 1733 | } |
| 1734 | |
| 1735 | if (found || !match_type) |
| 1736 | return found; |
| 1737 | |
| 1738 | return lang_output_section_find_by_flags (sec, sec_flags, NULL, NULL); |
| 1739 | } |
| 1740 | |
| 1741 | /* Find the last output section before given output statement. |
| 1742 | Used by place_orphan. */ |
| 1743 | |
| 1744 | static asection * |
| 1745 | output_prev_sec_find (lang_output_section_statement_type *os) |
| 1746 | { |
| 1747 | lang_output_section_statement_type *lookup; |
| 1748 | |
| 1749 | for (lookup = os->prev; lookup != NULL; lookup = lookup->prev) |
| 1750 | { |
| 1751 | if (lookup->constraint < 0) |
| 1752 | continue; |
| 1753 | |
| 1754 | if (lookup->bfd_section != NULL && lookup->bfd_section->owner != NULL) |
| 1755 | return lookup->bfd_section; |
| 1756 | } |
| 1757 | |
| 1758 | return NULL; |
| 1759 | } |
| 1760 | |
| 1761 | /* Look for a suitable place for a new output section statement. The |
| 1762 | idea is to skip over anything that might be inside a SECTIONS {} |
| 1763 | statement in a script, before we find another output section |
| 1764 | statement. Assignments to "dot" before an output section statement |
| 1765 | are assumed to belong to it, except in two cases; The first |
| 1766 | assignment to dot, and assignments before non-alloc sections. |
| 1767 | Otherwise we might put an orphan before . = . + SIZEOF_HEADERS or |
| 1768 | similar assignments that set the initial address, or we might |
| 1769 | insert non-alloc note sections among assignments setting end of |
| 1770 | image symbols. */ |
| 1771 | |
| 1772 | static lang_statement_union_type ** |
| 1773 | insert_os_after (lang_output_section_statement_type *after) |
| 1774 | { |
| 1775 | lang_statement_union_type **where; |
| 1776 | lang_statement_union_type **assign = NULL; |
| 1777 | bfd_boolean ignore_first; |
| 1778 | |
| 1779 | ignore_first |
| 1780 | = after == &lang_output_section_statement.head->output_section_statement; |
| 1781 | |
| 1782 | for (where = &after->header.next; |
| 1783 | *where != NULL; |
| 1784 | where = &(*where)->header.next) |
| 1785 | { |
| 1786 | switch ((*where)->header.type) |
| 1787 | { |
| 1788 | case lang_assignment_statement_enum: |
| 1789 | if (assign == NULL) |
| 1790 | { |
| 1791 | lang_assignment_statement_type *ass; |
| 1792 | |
| 1793 | ass = &(*where)->assignment_statement; |
| 1794 | if (ass->exp->type.node_class != etree_assert |
| 1795 | && ass->exp->assign.dst[0] == '.' |
| 1796 | && ass->exp->assign.dst[1] == 0) |
| 1797 | { |
| 1798 | if (!ignore_first) |
| 1799 | assign = where; |
| 1800 | ignore_first = FALSE; |
| 1801 | } |
| 1802 | } |
| 1803 | continue; |
| 1804 | case lang_wild_statement_enum: |
| 1805 | case lang_input_section_enum: |
| 1806 | case lang_object_symbols_statement_enum: |
| 1807 | case lang_fill_statement_enum: |
| 1808 | case lang_data_statement_enum: |
| 1809 | case lang_reloc_statement_enum: |
| 1810 | case lang_padding_statement_enum: |
| 1811 | case lang_constructors_statement_enum: |
| 1812 | assign = NULL; |
| 1813 | ignore_first = FALSE; |
| 1814 | continue; |
| 1815 | case lang_output_section_statement_enum: |
| 1816 | if (assign != NULL) |
| 1817 | { |
| 1818 | asection *s = (*where)->output_section_statement.bfd_section; |
| 1819 | |
| 1820 | if (s == NULL |
| 1821 | || s->map_head.s == NULL |
| 1822 | || (s->flags & SEC_ALLOC) != 0) |
| 1823 | where = assign; |
| 1824 | } |
| 1825 | break; |
| 1826 | case lang_input_statement_enum: |
| 1827 | case lang_address_statement_enum: |
| 1828 | case lang_target_statement_enum: |
| 1829 | case lang_output_statement_enum: |
| 1830 | case lang_group_statement_enum: |
| 1831 | case lang_insert_statement_enum: |
| 1832 | continue; |
| 1833 | } |
| 1834 | break; |
| 1835 | } |
| 1836 | |
| 1837 | return where; |
| 1838 | } |
| 1839 | |
| 1840 | lang_output_section_statement_type * |
| 1841 | lang_insert_orphan (asection *s, |
| 1842 | const char *secname, |
| 1843 | int constraint, |
| 1844 | lang_output_section_statement_type *after, |
| 1845 | struct orphan_save *place, |
| 1846 | etree_type *address, |
| 1847 | lang_statement_list_type *add_child) |
| 1848 | { |
| 1849 | lang_statement_list_type add; |
| 1850 | lang_output_section_statement_type *os; |
| 1851 | lang_output_section_statement_type **os_tail; |
| 1852 | |
| 1853 | /* If we have found an appropriate place for the output section |
| 1854 | statements for this orphan, add them to our own private list, |
| 1855 | inserting them later into the global statement list. */ |
| 1856 | if (after != NULL) |
| 1857 | { |
| 1858 | lang_list_init (&add); |
| 1859 | push_stat_ptr (&add); |
| 1860 | } |
| 1861 | |
| 1862 | if (bfd_link_relocatable (&link_info) |
| 1863 | || (s->flags & (SEC_LOAD | SEC_ALLOC)) == 0) |
| 1864 | address = exp_intop (0); |
| 1865 | |
| 1866 | os_tail = ((lang_output_section_statement_type **) |
| 1867 | lang_output_section_statement.tail); |
| 1868 | os = lang_enter_output_section_statement (secname, address, normal_section, |
| 1869 | NULL, NULL, NULL, constraint, 0); |
| 1870 | |
| 1871 | if (add_child == NULL) |
| 1872 | add_child = &os->children; |
| 1873 | lang_add_section (add_child, s, NULL, os); |
| 1874 | |
| 1875 | if (after && (s->flags & (SEC_LOAD | SEC_ALLOC)) != 0) |
| 1876 | { |
| 1877 | const char *region = (after->region |
| 1878 | ? after->region->name_list.name |
| 1879 | : DEFAULT_MEMORY_REGION); |
| 1880 | const char *lma_region = (after->lma_region |
| 1881 | ? after->lma_region->name_list.name |
| 1882 | : NULL); |
| 1883 | lang_leave_output_section_statement (NULL, region, after->phdrs, |
| 1884 | lma_region); |
| 1885 | } |
| 1886 | else |
| 1887 | lang_leave_output_section_statement (NULL, DEFAULT_MEMORY_REGION, NULL, |
| 1888 | NULL); |
| 1889 | |
| 1890 | /* Restore the global list pointer. */ |
| 1891 | if (after != NULL) |
| 1892 | pop_stat_ptr (); |
| 1893 | |
| 1894 | if (after != NULL && os->bfd_section != NULL) |
| 1895 | { |
| 1896 | asection *snew, *as; |
| 1897 | bfd_boolean place_after = place->stmt == NULL; |
| 1898 | bfd_boolean insert_after = TRUE; |
| 1899 | |
| 1900 | snew = os->bfd_section; |
| 1901 | |
| 1902 | /* Shuffle the bfd section list to make the output file look |
| 1903 | neater. This is really only cosmetic. */ |
| 1904 | if (place->section == NULL |
| 1905 | && after != (&lang_output_section_statement.head |
| 1906 | ->output_section_statement)) |
| 1907 | { |
| 1908 | asection *bfd_section = after->bfd_section; |
| 1909 | |
| 1910 | /* If the output statement hasn't been used to place any input |
| 1911 | sections (and thus doesn't have an output bfd_section), |
| 1912 | look for the closest prior output statement having an |
| 1913 | output section. */ |
| 1914 | if (bfd_section == NULL) |
| 1915 | bfd_section = output_prev_sec_find (after); |
| 1916 | |
| 1917 | if (bfd_section != NULL && bfd_section != snew) |
| 1918 | place->section = &bfd_section->next; |
| 1919 | } |
| 1920 | |
| 1921 | if (place->section == NULL) |
| 1922 | place->section = &link_info.output_bfd->sections; |
| 1923 | |
| 1924 | as = *place->section; |
| 1925 | |
| 1926 | if (!as) |
| 1927 | { |
| 1928 | /* Put the section at the end of the list. */ |
| 1929 | |
| 1930 | /* Unlink the section. */ |
| 1931 | bfd_section_list_remove (link_info.output_bfd, snew); |
| 1932 | |
| 1933 | /* Now tack it back on in the right place. */ |
| 1934 | bfd_section_list_append (link_info.output_bfd, snew); |
| 1935 | } |
| 1936 | else if ((bfd_get_flavour (link_info.output_bfd) |
| 1937 | == bfd_target_elf_flavour) |
| 1938 | && (bfd_get_flavour (s->owner) |
| 1939 | == bfd_target_elf_flavour) |
| 1940 | && ((elf_section_type (s) == SHT_NOTE |
| 1941 | && (s->flags & SEC_LOAD) != 0) |
| 1942 | || (elf_section_type (as) == SHT_NOTE |
| 1943 | && (as->flags & SEC_LOAD) != 0))) |
| 1944 | { |
| 1945 | /* Make sure that output note sections are grouped and sorted |
| 1946 | by alignments when inserting a note section or insert a |
| 1947 | section after a note section, */ |
| 1948 | asection *sec; |
| 1949 | /* A specific section after which the output note section |
| 1950 | should be placed. */ |
| 1951 | asection *after_sec; |
| 1952 | /* True if we need to insert the orphan section after a |
| 1953 | specific section to maintain output note section order. */ |
| 1954 | bfd_boolean after_sec_note = FALSE; |
| 1955 | |
| 1956 | static asection *first_orphan_note = NULL; |
| 1957 | |
| 1958 | /* Group and sort output note section by alignments in |
| 1959 | ascending order. */ |
| 1960 | after_sec = NULL; |
| 1961 | if (elf_section_type (s) == SHT_NOTE |
| 1962 | && (s->flags & SEC_LOAD) != 0) |
| 1963 | { |
| 1964 | /* Search from the beginning for the last output note |
| 1965 | section with equal or larger alignments. NB: Don't |
| 1966 | place orphan note section after non-note sections. */ |
| 1967 | |
| 1968 | first_orphan_note = NULL; |
| 1969 | for (sec = link_info.output_bfd->sections; |
| 1970 | (sec != NULL |
| 1971 | && !bfd_is_abs_section (sec)); |
| 1972 | sec = sec->next) |
| 1973 | if (sec != snew |
| 1974 | && elf_section_type (sec) == SHT_NOTE |
| 1975 | && (sec->flags & SEC_LOAD) != 0) |
| 1976 | { |
| 1977 | if (!first_orphan_note) |
| 1978 | first_orphan_note = sec; |
| 1979 | if (sec->alignment_power >= s->alignment_power) |
| 1980 | after_sec = sec; |
| 1981 | } |
| 1982 | else if (first_orphan_note) |
| 1983 | { |
| 1984 | /* Stop if there is non-note section after the first |
| 1985 | orphan note section. */ |
| 1986 | break; |
| 1987 | } |
| 1988 | |
| 1989 | /* If this will be the first orphan note section, it can |
| 1990 | be placed at the default location. */ |
| 1991 | after_sec_note = first_orphan_note != NULL; |
| 1992 | if (after_sec == NULL && after_sec_note) |
| 1993 | { |
| 1994 | /* If all output note sections have smaller |
| 1995 | alignments, place the section before all |
| 1996 | output orphan note sections. */ |
| 1997 | after_sec = first_orphan_note; |
| 1998 | insert_after = FALSE; |
| 1999 | } |
| 2000 | } |
| 2001 | else if (first_orphan_note) |
| 2002 | { |
| 2003 | /* Don't place non-note sections in the middle of orphan |
| 2004 | note sections. */ |
| 2005 | after_sec_note = TRUE; |
| 2006 | after_sec = as; |
| 2007 | for (sec = as->next; |
| 2008 | (sec != NULL |
| 2009 | && !bfd_is_abs_section (sec)); |
| 2010 | sec = sec->next) |
| 2011 | if (elf_section_type (sec) == SHT_NOTE |
| 2012 | && (sec->flags & SEC_LOAD) != 0) |
| 2013 | after_sec = sec; |
| 2014 | } |
| 2015 | |
| 2016 | if (after_sec_note) |
| 2017 | { |
| 2018 | if (after_sec) |
| 2019 | { |
| 2020 | /* Search forward to insert OS after AFTER_SEC output |
| 2021 | statement. */ |
| 2022 | lang_output_section_statement_type *stmt, *next; |
| 2023 | bfd_boolean found = FALSE; |
| 2024 | for (stmt = after; stmt != NULL; stmt = next) |
| 2025 | { |
| 2026 | next = stmt->next; |
| 2027 | if (insert_after) |
| 2028 | { |
| 2029 | if (stmt->bfd_section == after_sec) |
| 2030 | { |
| 2031 | place_after = TRUE; |
| 2032 | found = TRUE; |
| 2033 | after = stmt; |
| 2034 | break; |
| 2035 | } |
| 2036 | } |
| 2037 | else |
| 2038 | { |
| 2039 | /* If INSERT_AFTER is FALSE, place OS before |
| 2040 | AFTER_SEC output statement. */ |
| 2041 | if (next && next->bfd_section == after_sec) |
| 2042 | { |
| 2043 | place_after = TRUE; |
| 2044 | found = TRUE; |
| 2045 | after = stmt; |
| 2046 | break; |
| 2047 | } |
| 2048 | } |
| 2049 | } |
| 2050 | |
| 2051 | /* Search backward to insert OS after AFTER_SEC output |
| 2052 | statement. */ |
| 2053 | if (!found) |
| 2054 | for (stmt = after; stmt != NULL; stmt = stmt->prev) |
| 2055 | { |
| 2056 | if (insert_after) |
| 2057 | { |
| 2058 | if (stmt->bfd_section == after_sec) |
| 2059 | { |
| 2060 | place_after = TRUE; |
| 2061 | after = stmt; |
| 2062 | break; |
| 2063 | } |
| 2064 | } |
| 2065 | else |
| 2066 | { |
| 2067 | /* If INSERT_AFTER is FALSE, place OS before |
| 2068 | AFTER_SEC output statement. */ |
| 2069 | if (stmt->next->bfd_section == after_sec) |
| 2070 | { |
| 2071 | place_after = TRUE; |
| 2072 | after = stmt; |
| 2073 | break; |
| 2074 | } |
| 2075 | } |
| 2076 | } |
| 2077 | } |
| 2078 | |
| 2079 | if (after_sec == NULL |
| 2080 | || (insert_after && after_sec->next != snew) |
| 2081 | || (!insert_after && after_sec->prev != snew)) |
| 2082 | { |
| 2083 | /* Unlink the section. */ |
| 2084 | bfd_section_list_remove (link_info.output_bfd, snew); |
| 2085 | |
| 2086 | /* Place SNEW after AFTER_SEC. If AFTER_SEC is NULL, |
| 2087 | prepend SNEW. */ |
| 2088 | if (after_sec) |
| 2089 | { |
| 2090 | if (insert_after) |
| 2091 | bfd_section_list_insert_after (link_info.output_bfd, |
| 2092 | after_sec, snew); |
| 2093 | else |
| 2094 | bfd_section_list_insert_before (link_info.output_bfd, |
| 2095 | after_sec, snew); |
| 2096 | } |
| 2097 | else |
| 2098 | bfd_section_list_prepend (link_info.output_bfd, snew); |
| 2099 | } |
| 2100 | } |
| 2101 | else if (as != snew && as->prev != snew) |
| 2102 | { |
| 2103 | /* Unlink the section. */ |
| 2104 | bfd_section_list_remove (link_info.output_bfd, snew); |
| 2105 | |
| 2106 | /* Now tack it back on in the right place. */ |
| 2107 | bfd_section_list_insert_before (link_info.output_bfd, |
| 2108 | as, snew); |
| 2109 | } |
| 2110 | } |
| 2111 | else if (as != snew && as->prev != snew) |
| 2112 | { |
| 2113 | /* Unlink the section. */ |
| 2114 | bfd_section_list_remove (link_info.output_bfd, snew); |
| 2115 | |
| 2116 | /* Now tack it back on in the right place. */ |
| 2117 | bfd_section_list_insert_before (link_info.output_bfd, as, snew); |
| 2118 | } |
| 2119 | |
| 2120 | /* Save the end of this list. Further ophans of this type will |
| 2121 | follow the one we've just added. */ |
| 2122 | place->section = &snew->next; |
| 2123 | |
| 2124 | /* The following is non-cosmetic. We try to put the output |
| 2125 | statements in some sort of reasonable order here, because they |
| 2126 | determine the final load addresses of the orphan sections. |
| 2127 | In addition, placing output statements in the wrong order may |
| 2128 | require extra segments. For instance, given a typical |
| 2129 | situation of all read-only sections placed in one segment and |
| 2130 | following that a segment containing all the read-write |
| 2131 | sections, we wouldn't want to place an orphan read/write |
| 2132 | section before or amongst the read-only ones. */ |
| 2133 | if (add.head != NULL) |
| 2134 | { |
| 2135 | lang_output_section_statement_type *newly_added_os; |
| 2136 | |
| 2137 | /* Place OS after AFTER if AFTER_NOTE is TRUE. */ |
| 2138 | if (place_after) |
| 2139 | { |
| 2140 | lang_statement_union_type **where = insert_os_after (after); |
| 2141 | |
| 2142 | *add.tail = *where; |
| 2143 | *where = add.head; |
| 2144 | |
| 2145 | place->os_tail = &after->next; |
| 2146 | } |
| 2147 | else |
| 2148 | { |
| 2149 | /* Put it after the last orphan statement we added. */ |
| 2150 | *add.tail = *place->stmt; |
| 2151 | *place->stmt = add.head; |
| 2152 | } |
| 2153 | |
| 2154 | /* Fix the global list pointer if we happened to tack our |
| 2155 | new list at the tail. */ |
| 2156 | if (*stat_ptr->tail == add.head) |
| 2157 | stat_ptr->tail = add.tail; |
| 2158 | |
| 2159 | /* Save the end of this list. */ |
| 2160 | place->stmt = add.tail; |
| 2161 | |
| 2162 | /* Do the same for the list of output section statements. */ |
| 2163 | newly_added_os = *os_tail; |
| 2164 | *os_tail = NULL; |
| 2165 | newly_added_os->prev = (lang_output_section_statement_type *) |
| 2166 | ((char *) place->os_tail |
| 2167 | - offsetof (lang_output_section_statement_type, next)); |
| 2168 | newly_added_os->next = *place->os_tail; |
| 2169 | if (newly_added_os->next != NULL) |
| 2170 | newly_added_os->next->prev = newly_added_os; |
| 2171 | *place->os_tail = newly_added_os; |
| 2172 | place->os_tail = &newly_added_os->next; |
| 2173 | |
| 2174 | /* Fixing the global list pointer here is a little different. |
| 2175 | We added to the list in lang_enter_output_section_statement, |
| 2176 | trimmed off the new output_section_statment above when |
| 2177 | assigning *os_tail = NULL, but possibly added it back in |
| 2178 | the same place when assigning *place->os_tail. */ |
| 2179 | if (*os_tail == NULL) |
| 2180 | lang_output_section_statement.tail |
| 2181 | = (lang_statement_union_type **) os_tail; |
| 2182 | } |
| 2183 | } |
| 2184 | return os; |
| 2185 | } |
| 2186 | |
| 2187 | static void |
| 2188 | lang_print_asneeded (void) |
| 2189 | { |
| 2190 | struct asneeded_minfo *m; |
| 2191 | |
| 2192 | if (asneeded_list_head == NULL) |
| 2193 | return; |
| 2194 | |
| 2195 | minfo (_("\nAs-needed library included to satisfy reference by file (symbol)\n\n")); |
| 2196 | |
| 2197 | for (m = asneeded_list_head; m != NULL; m = m->next) |
| 2198 | { |
| 2199 | size_t len; |
| 2200 | |
| 2201 | minfo ("%s", m->soname); |
| 2202 | len = strlen (m->soname); |
| 2203 | |
| 2204 | if (len >= 29) |
| 2205 | { |
| 2206 | print_nl (); |
| 2207 | len = 0; |
| 2208 | } |
| 2209 | while (len < 30) |
| 2210 | { |
| 2211 | print_space (); |
| 2212 | ++len; |
| 2213 | } |
| 2214 | |
| 2215 | if (m->ref != NULL) |
| 2216 | minfo ("%pB ", m->ref); |
| 2217 | minfo ("(%pT)\n", m->name); |
| 2218 | } |
| 2219 | } |
| 2220 | |
| 2221 | static void |
| 2222 | lang_map_flags (flagword flag) |
| 2223 | { |
| 2224 | if (flag & SEC_ALLOC) |
| 2225 | minfo ("a"); |
| 2226 | |
| 2227 | if (flag & SEC_CODE) |
| 2228 | minfo ("x"); |
| 2229 | |
| 2230 | if (flag & SEC_READONLY) |
| 2231 | minfo ("r"); |
| 2232 | |
| 2233 | if (flag & SEC_DATA) |
| 2234 | minfo ("w"); |
| 2235 | |
| 2236 | if (flag & SEC_LOAD) |
| 2237 | minfo ("l"); |
| 2238 | } |
| 2239 | |
| 2240 | void |
| 2241 | lang_map (void) |
| 2242 | { |
| 2243 | lang_memory_region_type *m; |
| 2244 | bfd_boolean dis_header_printed = FALSE; |
| 2245 | |
| 2246 | LANG_FOR_EACH_INPUT_STATEMENT (file) |
| 2247 | { |
| 2248 | asection *s; |
| 2249 | |
| 2250 | if ((file->the_bfd->flags & (BFD_LINKER_CREATED | DYNAMIC)) != 0 |
| 2251 | || file->flags.just_syms) |
| 2252 | continue; |
| 2253 | |
| 2254 | if (config.print_map_discarded) |
| 2255 | for (s = file->the_bfd->sections; s != NULL; s = s->next) |
| 2256 | if ((s->output_section == NULL |
| 2257 | || s->output_section->owner != link_info.output_bfd) |
| 2258 | && (s->flags & (SEC_LINKER_CREATED | SEC_KEEP)) == 0) |
| 2259 | { |
| 2260 | if (! dis_header_printed) |
| 2261 | { |
| 2262 | fprintf (config.map_file, _("\nDiscarded input sections\n\n")); |
| 2263 | dis_header_printed = TRUE; |
| 2264 | } |
| 2265 | |
| 2266 | print_input_section (s, TRUE); |
| 2267 | } |
| 2268 | } |
| 2269 | |
| 2270 | minfo (_("\nMemory Configuration\n\n")); |
| 2271 | fprintf (config.map_file, "%-16s %-18s %-18s %s\n", |
| 2272 | _("Name"), _("Origin"), _("Length"), _("Attributes")); |
| 2273 | |
| 2274 | for (m = lang_memory_region_list; m != NULL; m = m->next) |
| 2275 | { |
| 2276 | char buf[100]; |
| 2277 | int len; |
| 2278 | |
| 2279 | fprintf (config.map_file, "%-16s ", m->name_list.name); |
| 2280 | |
| 2281 | sprintf_vma (buf, m->origin); |
| 2282 | minfo ("0x%s ", buf); |
| 2283 | len = strlen (buf); |
| 2284 | while (len < 16) |
| 2285 | { |
| 2286 | print_space (); |
| 2287 | ++len; |
| 2288 | } |
| 2289 | |
| 2290 | minfo ("0x%V", m->length); |
| 2291 | if (m->flags || m->not_flags) |
| 2292 | { |
| 2293 | #ifndef BFD64 |
| 2294 | minfo (" "); |
| 2295 | #endif |
| 2296 | if (m->flags) |
| 2297 | { |
| 2298 | print_space (); |
| 2299 | lang_map_flags (m->flags); |
| 2300 | } |
| 2301 | |
| 2302 | if (m->not_flags) |
| 2303 | { |
| 2304 | minfo (" !"); |
| 2305 | lang_map_flags (m->not_flags); |
| 2306 | } |
| 2307 | } |
| 2308 | |
| 2309 | print_nl (); |
| 2310 | } |
| 2311 | |
| 2312 | fprintf (config.map_file, _("\nLinker script and memory map\n\n")); |
| 2313 | |
| 2314 | if (!link_info.reduce_memory_overheads) |
| 2315 | { |
| 2316 | obstack_begin (&map_obstack, 1000); |
| 2317 | bfd_link_hash_traverse (link_info.hash, sort_def_symbol, 0); |
| 2318 | } |
| 2319 | expld.phase = lang_fixed_phase_enum; |
| 2320 | lang_statement_iteration++; |
| 2321 | print_statements (); |
| 2322 | |
| 2323 | ldemul_extra_map_file_text (link_info.output_bfd, &link_info, |
| 2324 | config.map_file); |
| 2325 | } |
| 2326 | |
| 2327 | static bfd_boolean |
| 2328 | sort_def_symbol (struct bfd_link_hash_entry *hash_entry, |
| 2329 | void *info ATTRIBUTE_UNUSED) |
| 2330 | { |
| 2331 | if ((hash_entry->type == bfd_link_hash_defined |
| 2332 | || hash_entry->type == bfd_link_hash_defweak) |
| 2333 | && hash_entry->u.def.section->owner != link_info.output_bfd |
| 2334 | && hash_entry->u.def.section->owner != NULL) |
| 2335 | { |
| 2336 | input_section_userdata_type *ud; |
| 2337 | struct map_symbol_def *def; |
| 2338 | |
| 2339 | ud = ((input_section_userdata_type *) |
| 2340 | get_userdata (hash_entry->u.def.section)); |
| 2341 | if (!ud) |
| 2342 | { |
| 2343 | ud = (input_section_userdata_type *) stat_alloc (sizeof (*ud)); |
| 2344 | get_userdata (hash_entry->u.def.section) = ud; |
| 2345 | ud->map_symbol_def_tail = &ud->map_symbol_def_head; |
| 2346 | ud->map_symbol_def_count = 0; |
| 2347 | } |
| 2348 | else if (!ud->map_symbol_def_tail) |
| 2349 | ud->map_symbol_def_tail = &ud->map_symbol_def_head; |
| 2350 | |
| 2351 | def = (struct map_symbol_def *) obstack_alloc (&map_obstack, sizeof *def); |
| 2352 | def->entry = hash_entry; |
| 2353 | *(ud->map_symbol_def_tail) = def; |
| 2354 | ud->map_symbol_def_tail = &def->next; |
| 2355 | ud->map_symbol_def_count++; |
| 2356 | } |
| 2357 | return TRUE; |
| 2358 | } |
| 2359 | |
| 2360 | /* Initialize an output section. */ |
| 2361 | |
| 2362 | static void |
| 2363 | init_os (lang_output_section_statement_type *s, flagword flags) |
| 2364 | { |
| 2365 | if (strcmp (s->name, DISCARD_SECTION_NAME) == 0) |
| 2366 | einfo (_("%F%P: illegal use of `%s' section\n"), DISCARD_SECTION_NAME); |
| 2367 | |
| 2368 | if (s->constraint != SPECIAL) |
| 2369 | s->bfd_section = bfd_get_section_by_name (link_info.output_bfd, s->name); |
| 2370 | if (s->bfd_section == NULL) |
| 2371 | s->bfd_section = bfd_make_section_anyway_with_flags (link_info.output_bfd, |
| 2372 | s->name, flags); |
| 2373 | if (s->bfd_section == NULL) |
| 2374 | { |
| 2375 | einfo (_("%F%P: output format %s cannot represent section" |
| 2376 | " called %s: %E\n"), |
| 2377 | link_info.output_bfd->xvec->name, s->name); |
| 2378 | } |
| 2379 | s->bfd_section->output_section = s->bfd_section; |
| 2380 | s->bfd_section->output_offset = 0; |
| 2381 | |
| 2382 | /* Set the userdata of the output section to the output section |
| 2383 | statement to avoid lookup. */ |
| 2384 | get_userdata (s->bfd_section) = s; |
| 2385 | |
| 2386 | /* If there is a base address, make sure that any sections it might |
| 2387 | mention are initialized. */ |
| 2388 | if (s->addr_tree != NULL) |
| 2389 | exp_init_os (s->addr_tree); |
| 2390 | |
| 2391 | if (s->load_base != NULL) |
| 2392 | exp_init_os (s->load_base); |
| 2393 | |
| 2394 | /* If supplied an alignment, set it. */ |
| 2395 | if (s->section_alignment != NULL) |
| 2396 | s->bfd_section->alignment_power = exp_get_power (s->section_alignment, |
| 2397 | "section alignment"); |
| 2398 | } |
| 2399 | |
| 2400 | /* Make sure that all output sections mentioned in an expression are |
| 2401 | initialized. */ |
| 2402 | |
| 2403 | static void |
| 2404 | exp_init_os (etree_type *exp) |
| 2405 | { |
| 2406 | switch (exp->type.node_class) |
| 2407 | { |
| 2408 | case etree_assign: |
| 2409 | case etree_provide: |
| 2410 | case etree_provided: |
| 2411 | exp_init_os (exp->assign.src); |
| 2412 | break; |
| 2413 | |
| 2414 | case etree_binary: |
| 2415 | exp_init_os (exp->binary.lhs); |
| 2416 | exp_init_os (exp->binary.rhs); |
| 2417 | break; |
| 2418 | |
| 2419 | case etree_trinary: |
| 2420 | exp_init_os (exp->trinary.cond); |
| 2421 | exp_init_os (exp->trinary.lhs); |
| 2422 | exp_init_os (exp->trinary.rhs); |
| 2423 | break; |
| 2424 | |
| 2425 | case etree_assert: |
| 2426 | exp_init_os (exp->assert_s.child); |
| 2427 | break; |
| 2428 | |
| 2429 | case etree_unary: |
| 2430 | exp_init_os (exp->unary.child); |
| 2431 | break; |
| 2432 | |
| 2433 | case etree_name: |
| 2434 | switch (exp->type.node_code) |
| 2435 | { |
| 2436 | case ADDR: |
| 2437 | case LOADADDR: |
| 2438 | case SIZEOF: |
| 2439 | { |
| 2440 | lang_output_section_statement_type *os; |
| 2441 | |
| 2442 | os = lang_output_section_find (exp->name.name); |
| 2443 | if (os != NULL && os->bfd_section == NULL) |
| 2444 | init_os (os, 0); |
| 2445 | } |
| 2446 | } |
| 2447 | break; |
| 2448 | |
| 2449 | default: |
| 2450 | break; |
| 2451 | } |
| 2452 | } |
| 2453 | \f |
| 2454 | static void |
| 2455 | section_already_linked (bfd *abfd, asection *sec, void *data) |
| 2456 | { |
| 2457 | lang_input_statement_type *entry = (lang_input_statement_type *) data; |
| 2458 | |
| 2459 | /* If we are only reading symbols from this object, then we want to |
| 2460 | discard all sections. */ |
| 2461 | if (entry->flags.just_syms) |
| 2462 | { |
| 2463 | bfd_link_just_syms (abfd, sec, &link_info); |
| 2464 | return; |
| 2465 | } |
| 2466 | |
| 2467 | /* Deal with SHF_EXCLUDE ELF sections. */ |
| 2468 | if (!bfd_link_relocatable (&link_info) |
| 2469 | && (abfd->flags & BFD_PLUGIN) == 0 |
| 2470 | && (sec->flags & (SEC_GROUP | SEC_KEEP | SEC_EXCLUDE)) == SEC_EXCLUDE) |
| 2471 | sec->output_section = bfd_abs_section_ptr; |
| 2472 | |
| 2473 | if (!(abfd->flags & DYNAMIC)) |
| 2474 | bfd_section_already_linked (abfd, sec, &link_info); |
| 2475 | } |
| 2476 | \f |
| 2477 | |
| 2478 | /* Returns true if SECTION is one we know will be discarded based on its |
| 2479 | section flags, otherwise returns false. */ |
| 2480 | |
| 2481 | static bfd_boolean |
| 2482 | lang_discard_section_p (asection *section) |
| 2483 | { |
| 2484 | bfd_boolean discard; |
| 2485 | flagword flags = section->flags; |
| 2486 | |
| 2487 | /* Discard sections marked with SEC_EXCLUDE. */ |
| 2488 | discard = (flags & SEC_EXCLUDE) != 0; |
| 2489 | |
| 2490 | /* Discard the group descriptor sections when we're finally placing the |
| 2491 | sections from within the group. */ |
| 2492 | if ((flags & SEC_GROUP) != 0 |
| 2493 | && link_info.resolve_section_groups) |
| 2494 | discard = TRUE; |
| 2495 | |
| 2496 | /* Discard debugging sections if we are stripping debugging |
| 2497 | information. */ |
| 2498 | if ((link_info.strip == strip_debugger || link_info.strip == strip_all) |
| 2499 | && (flags & SEC_DEBUGGING) != 0) |
| 2500 | discard = TRUE; |
| 2501 | |
| 2502 | return discard; |
| 2503 | } |
| 2504 | |
| 2505 | /* The wild routines. |
| 2506 | |
| 2507 | These expand statements like *(.text) and foo.o to a list of |
| 2508 | explicit actions, like foo.o(.text), bar.o(.text) and |
| 2509 | foo.o(.text, .data). */ |
| 2510 | |
| 2511 | /* Add SECTION to the output section OUTPUT. Do this by creating a |
| 2512 | lang_input_section statement which is placed at PTR. */ |
| 2513 | |
| 2514 | void |
| 2515 | lang_add_section (lang_statement_list_type *ptr, |
| 2516 | asection *section, |
| 2517 | struct flag_info *sflag_info, |
| 2518 | lang_output_section_statement_type *output) |
| 2519 | { |
| 2520 | flagword flags = section->flags; |
| 2521 | |
| 2522 | bfd_boolean discard; |
| 2523 | lang_input_section_type *new_section; |
| 2524 | bfd *abfd = link_info.output_bfd; |
| 2525 | |
| 2526 | /* Is this section one we know should be discarded? */ |
| 2527 | discard = lang_discard_section_p (section); |
| 2528 | |
| 2529 | /* Discard input sections which are assigned to a section named |
| 2530 | DISCARD_SECTION_NAME. */ |
| 2531 | if (strcmp (output->name, DISCARD_SECTION_NAME) == 0) |
| 2532 | discard = TRUE; |
| 2533 | |
| 2534 | if (discard) |
| 2535 | { |
| 2536 | if (section->output_section == NULL) |
| 2537 | { |
| 2538 | /* This prevents future calls from assigning this section. */ |
| 2539 | section->output_section = bfd_abs_section_ptr; |
| 2540 | } |
| 2541 | return; |
| 2542 | } |
| 2543 | |
| 2544 | if (sflag_info) |
| 2545 | { |
| 2546 | bfd_boolean keep; |
| 2547 | |
| 2548 | keep = bfd_lookup_section_flags (&link_info, sflag_info, section); |
| 2549 | if (!keep) |
| 2550 | return; |
| 2551 | } |
| 2552 | |
| 2553 | if (section->output_section != NULL) |
| 2554 | return; |
| 2555 | |
| 2556 | /* We don't copy the SEC_NEVER_LOAD flag from an input section |
| 2557 | to an output section, because we want to be able to include a |
| 2558 | SEC_NEVER_LOAD section in the middle of an otherwise loaded |
| 2559 | section (I don't know why we want to do this, but we do). |
| 2560 | build_link_order in ldwrite.c handles this case by turning |
| 2561 | the embedded SEC_NEVER_LOAD section into a fill. */ |
| 2562 | flags &= ~ SEC_NEVER_LOAD; |
| 2563 | |
| 2564 | /* If final link, don't copy the SEC_LINK_ONCE flags, they've |
| 2565 | already been processed. One reason to do this is that on pe |
| 2566 | format targets, .text$foo sections go into .text and it's odd |
| 2567 | to see .text with SEC_LINK_ONCE set. */ |
| 2568 | if ((flags & (SEC_LINK_ONCE | SEC_GROUP)) == (SEC_LINK_ONCE | SEC_GROUP)) |
| 2569 | { |
| 2570 | if (link_info.resolve_section_groups) |
| 2571 | flags &= ~(SEC_LINK_ONCE | SEC_LINK_DUPLICATES | SEC_RELOC); |
| 2572 | else |
| 2573 | flags &= ~(SEC_LINK_DUPLICATES | SEC_RELOC); |
| 2574 | } |
| 2575 | else if (!bfd_link_relocatable (&link_info)) |
| 2576 | flags &= ~(SEC_LINK_ONCE | SEC_LINK_DUPLICATES | SEC_RELOC); |
| 2577 | |
| 2578 | switch (output->sectype) |
| 2579 | { |
| 2580 | case normal_section: |
| 2581 | case overlay_section: |
| 2582 | case first_overlay_section: |
| 2583 | break; |
| 2584 | case noalloc_section: |
| 2585 | flags &= ~SEC_ALLOC; |
| 2586 | break; |
| 2587 | case noload_section: |
| 2588 | flags &= ~SEC_LOAD; |
| 2589 | flags |= SEC_NEVER_LOAD; |
| 2590 | /* Unfortunately GNU ld has managed to evolve two different |
| 2591 | meanings to NOLOAD in scripts. ELF gets a .bss style noload, |
| 2592 | alloc, no contents section. All others get a noload, noalloc |
| 2593 | section. */ |
| 2594 | if (bfd_get_flavour (link_info.output_bfd) == bfd_target_elf_flavour) |
| 2595 | flags &= ~SEC_HAS_CONTENTS; |
| 2596 | else |
| 2597 | flags &= ~SEC_ALLOC; |
| 2598 | break; |
| 2599 | } |
| 2600 | |
| 2601 | if (output->bfd_section == NULL) |
| 2602 | init_os (output, flags); |
| 2603 | |
| 2604 | /* If SEC_READONLY is not set in the input section, then clear |
| 2605 | it from the output section. */ |
| 2606 | output->bfd_section->flags &= flags | ~SEC_READONLY; |
| 2607 | |
| 2608 | if (output->bfd_section->linker_has_input) |
| 2609 | { |
| 2610 | /* Only set SEC_READONLY flag on the first input section. */ |
| 2611 | flags &= ~ SEC_READONLY; |
| 2612 | |
| 2613 | /* Keep SEC_MERGE and SEC_STRINGS only if they are the same. */ |
| 2614 | if ((output->bfd_section->flags & (SEC_MERGE | SEC_STRINGS)) |
| 2615 | != (flags & (SEC_MERGE | SEC_STRINGS)) |
| 2616 | || ((flags & SEC_MERGE) != 0 |
| 2617 | && output->bfd_section->entsize != section->entsize)) |
| 2618 | { |
| 2619 | output->bfd_section->flags &= ~ (SEC_MERGE | SEC_STRINGS); |
| 2620 | flags &= ~ (SEC_MERGE | SEC_STRINGS); |
| 2621 | } |
| 2622 | } |
| 2623 | output->bfd_section->flags |= flags; |
| 2624 | |
| 2625 | if (!output->bfd_section->linker_has_input) |
| 2626 | { |
| 2627 | output->bfd_section->linker_has_input = 1; |
| 2628 | /* This must happen after flags have been updated. The output |
| 2629 | section may have been created before we saw its first input |
| 2630 | section, eg. for a data statement. */ |
| 2631 | bfd_init_private_section_data (section->owner, section, |
| 2632 | link_info.output_bfd, |
| 2633 | output->bfd_section, |
| 2634 | &link_info); |
| 2635 | if ((flags & SEC_MERGE) != 0) |
| 2636 | output->bfd_section->entsize = section->entsize; |
| 2637 | } |
| 2638 | |
| 2639 | if ((flags & SEC_TIC54X_BLOCK) != 0 |
| 2640 | && bfd_get_arch (section->owner) == bfd_arch_tic54x) |
| 2641 | { |
| 2642 | /* FIXME: This value should really be obtained from the bfd... */ |
| 2643 | output->block_value = 128; |
| 2644 | } |
| 2645 | |
| 2646 | if (section->alignment_power > output->bfd_section->alignment_power) |
| 2647 | output->bfd_section->alignment_power = section->alignment_power; |
| 2648 | |
| 2649 | section->output_section = output->bfd_section; |
| 2650 | |
| 2651 | if (!map_head_is_link_order) |
| 2652 | { |
| 2653 | asection *s = output->bfd_section->map_tail.s; |
| 2654 | output->bfd_section->map_tail.s = section; |
| 2655 | section->map_head.s = NULL; |
| 2656 | section->map_tail.s = s; |
| 2657 | if (s != NULL) |
| 2658 | s->map_head.s = section; |
| 2659 | else |
| 2660 | output->bfd_section->map_head.s = section; |
| 2661 | } |
| 2662 | |
| 2663 | /* Add a section reference to the list. */ |
| 2664 | new_section = new_stat (lang_input_section, ptr); |
| 2665 | new_section->section = section; |
| 2666 | } |
| 2667 | |
| 2668 | /* Handle wildcard sorting. This returns the lang_input_section which |
| 2669 | should follow the one we are going to create for SECTION and FILE, |
| 2670 | based on the sorting requirements of WILD. It returns NULL if the |
| 2671 | new section should just go at the end of the current list. */ |
| 2672 | |
| 2673 | static lang_statement_union_type * |
| 2674 | wild_sort (lang_wild_statement_type *wild, |
| 2675 | struct wildcard_list *sec, |
| 2676 | lang_input_statement_type *file, |
| 2677 | asection *section) |
| 2678 | { |
| 2679 | lang_statement_union_type *l; |
| 2680 | |
| 2681 | if (!wild->filenames_sorted |
| 2682 | && (sec == NULL || sec->spec.sorted == none)) |
| 2683 | return NULL; |
| 2684 | |
| 2685 | for (l = wild->children.head; l != NULL; l = l->header.next) |
| 2686 | { |
| 2687 | lang_input_section_type *ls; |
| 2688 | |
| 2689 | if (l->header.type != lang_input_section_enum) |
| 2690 | continue; |
| 2691 | ls = &l->input_section; |
| 2692 | |
| 2693 | /* Sorting by filename takes precedence over sorting by section |
| 2694 | name. */ |
| 2695 | |
| 2696 | if (wild->filenames_sorted) |
| 2697 | { |
| 2698 | const char *fn, *ln; |
| 2699 | bfd_boolean fa, la; |
| 2700 | int i; |
| 2701 | |
| 2702 | /* The PE support for the .idata section as generated by |
| 2703 | dlltool assumes that files will be sorted by the name of |
| 2704 | the archive and then the name of the file within the |
| 2705 | archive. */ |
| 2706 | |
| 2707 | if (file->the_bfd != NULL |
| 2708 | && file->the_bfd->my_archive != NULL) |
| 2709 | { |
| 2710 | fn = bfd_get_filename (file->the_bfd->my_archive); |
| 2711 | fa = TRUE; |
| 2712 | } |
| 2713 | else |
| 2714 | { |
| 2715 | fn = file->filename; |
| 2716 | fa = FALSE; |
| 2717 | } |
| 2718 | |
| 2719 | if (ls->section->owner->my_archive != NULL) |
| 2720 | { |
| 2721 | ln = bfd_get_filename (ls->section->owner->my_archive); |
| 2722 | la = TRUE; |
| 2723 | } |
| 2724 | else |
| 2725 | { |
| 2726 | ln = ls->section->owner->filename; |
| 2727 | la = FALSE; |
| 2728 | } |
| 2729 | |
| 2730 | i = filename_cmp (fn, ln); |
| 2731 | if (i > 0) |
| 2732 | continue; |
| 2733 | else if (i < 0) |
| 2734 | break; |
| 2735 | |
| 2736 | if (fa || la) |
| 2737 | { |
| 2738 | if (fa) |
| 2739 | fn = file->filename; |
| 2740 | if (la) |
| 2741 | ln = ls->section->owner->filename; |
| 2742 | |
| 2743 | i = filename_cmp (fn, ln); |
| 2744 | if (i > 0) |
| 2745 | continue; |
| 2746 | else if (i < 0) |
| 2747 | break; |
| 2748 | } |
| 2749 | } |
| 2750 | |
| 2751 | /* Here either the files are not sorted by name, or we are |
| 2752 | looking at the sections for this file. */ |
| 2753 | |
| 2754 | if (sec != NULL |
| 2755 | && sec->spec.sorted != none |
| 2756 | && sec->spec.sorted != by_none) |
| 2757 | if (compare_section (sec->spec.sorted, section, ls->section) < 0) |
| 2758 | break; |
| 2759 | } |
| 2760 | |
| 2761 | return l; |
| 2762 | } |
| 2763 | |
| 2764 | /* Expand a wild statement for a particular FILE. SECTION may be |
| 2765 | NULL, in which case it is a wild card. */ |
| 2766 | |
| 2767 | static void |
| 2768 | output_section_callback (lang_wild_statement_type *ptr, |
| 2769 | struct wildcard_list *sec, |
| 2770 | asection *section, |
| 2771 | struct flag_info *sflag_info, |
| 2772 | lang_input_statement_type *file, |
| 2773 | void *output) |
| 2774 | { |
| 2775 | lang_statement_union_type *before; |
| 2776 | lang_output_section_statement_type *os; |
| 2777 | |
| 2778 | os = (lang_output_section_statement_type *) output; |
| 2779 | |
| 2780 | /* Exclude sections that match UNIQUE_SECTION_LIST. */ |
| 2781 | if (unique_section_p (section, os)) |
| 2782 | return; |
| 2783 | |
| 2784 | before = wild_sort (ptr, sec, file, section); |
| 2785 | |
| 2786 | /* Here BEFORE points to the lang_input_section which |
| 2787 | should follow the one we are about to add. If BEFORE |
| 2788 | is NULL, then the section should just go at the end |
| 2789 | of the current list. */ |
| 2790 | |
| 2791 | if (before == NULL) |
| 2792 | lang_add_section (&ptr->children, section, sflag_info, os); |
| 2793 | else |
| 2794 | { |
| 2795 | lang_statement_list_type list; |
| 2796 | lang_statement_union_type **pp; |
| 2797 | |
| 2798 | lang_list_init (&list); |
| 2799 | lang_add_section (&list, section, sflag_info, os); |
| 2800 | |
| 2801 | /* If we are discarding the section, LIST.HEAD will |
| 2802 | be NULL. */ |
| 2803 | if (list.head != NULL) |
| 2804 | { |
| 2805 | ASSERT (list.head->header.next == NULL); |
| 2806 | |
| 2807 | for (pp = &ptr->children.head; |
| 2808 | *pp != before; |
| 2809 | pp = &(*pp)->header.next) |
| 2810 | ASSERT (*pp != NULL); |
| 2811 | |
| 2812 | list.head->header.next = *pp; |
| 2813 | *pp = list.head; |
| 2814 | } |
| 2815 | } |
| 2816 | } |
| 2817 | |
| 2818 | /* Check if all sections in a wild statement for a particular FILE |
| 2819 | are readonly. */ |
| 2820 | |
| 2821 | static void |
| 2822 | check_section_callback (lang_wild_statement_type *ptr ATTRIBUTE_UNUSED, |
| 2823 | struct wildcard_list *sec ATTRIBUTE_UNUSED, |
| 2824 | asection *section, |
| 2825 | struct flag_info *sflag_info ATTRIBUTE_UNUSED, |
| 2826 | lang_input_statement_type *file ATTRIBUTE_UNUSED, |
| 2827 | void *output) |
| 2828 | { |
| 2829 | lang_output_section_statement_type *os; |
| 2830 | |
| 2831 | os = (lang_output_section_statement_type *) output; |
| 2832 | |
| 2833 | /* Exclude sections that match UNIQUE_SECTION_LIST. */ |
| 2834 | if (unique_section_p (section, os)) |
| 2835 | return; |
| 2836 | |
| 2837 | if (section->output_section == NULL && (section->flags & SEC_READONLY) == 0) |
| 2838 | os->all_input_readonly = FALSE; |
| 2839 | } |
| 2840 | |
| 2841 | /* This is passed a file name which must have been seen already and |
| 2842 | added to the statement tree. We will see if it has been opened |
| 2843 | already and had its symbols read. If not then we'll read it. */ |
| 2844 | |
| 2845 | static lang_input_statement_type * |
| 2846 | lookup_name (const char *name) |
| 2847 | { |
| 2848 | lang_input_statement_type *search; |
| 2849 | |
| 2850 | for (search = (lang_input_statement_type *) input_file_chain.head; |
| 2851 | search != NULL; |
| 2852 | search = (lang_input_statement_type *) search->next_real_file) |
| 2853 | { |
| 2854 | /* Use the local_sym_name as the name of the file that has |
| 2855 | already been loaded as filename might have been transformed |
| 2856 | via the search directory lookup mechanism. */ |
| 2857 | const char *filename = search->local_sym_name; |
| 2858 | |
| 2859 | if (filename != NULL |
| 2860 | && filename_cmp (filename, name) == 0) |
| 2861 | break; |
| 2862 | } |
| 2863 | |
| 2864 | if (search == NULL) |
| 2865 | search = new_afile (name, lang_input_file_is_search_file_enum, |
| 2866 | default_target, FALSE); |
| 2867 | |
| 2868 | /* If we have already added this file, or this file is not real |
| 2869 | don't add this file. */ |
| 2870 | if (search->flags.loaded || !search->flags.real) |
| 2871 | return search; |
| 2872 | |
| 2873 | if (!load_symbols (search, NULL)) |
| 2874 | return NULL; |
| 2875 | |
| 2876 | return search; |
| 2877 | } |
| 2878 | |
| 2879 | /* Save LIST as a list of libraries whose symbols should not be exported. */ |
| 2880 | |
| 2881 | struct excluded_lib |
| 2882 | { |
| 2883 | char *name; |
| 2884 | struct excluded_lib *next; |
| 2885 | }; |
| 2886 | static struct excluded_lib *excluded_libs; |
| 2887 | |
| 2888 | void |
| 2889 | add_excluded_libs (const char *list) |
| 2890 | { |
| 2891 | const char *p = list, *end; |
| 2892 | |
| 2893 | while (*p != '\0') |
| 2894 | { |
| 2895 | struct excluded_lib *entry; |
| 2896 | end = strpbrk (p, ",:"); |
| 2897 | if (end == NULL) |
| 2898 | end = p + strlen (p); |
| 2899 | entry = (struct excluded_lib *) xmalloc (sizeof (*entry)); |
| 2900 | entry->next = excluded_libs; |
| 2901 | entry->name = (char *) xmalloc (end - p + 1); |
| 2902 | memcpy (entry->name, p, end - p); |
| 2903 | entry->name[end - p] = '\0'; |
| 2904 | excluded_libs = entry; |
| 2905 | if (*end == '\0') |
| 2906 | break; |
| 2907 | p = end + 1; |
| 2908 | } |
| 2909 | } |
| 2910 | |
| 2911 | static void |
| 2912 | check_excluded_libs (bfd *abfd) |
| 2913 | { |
| 2914 | struct excluded_lib *lib = excluded_libs; |
| 2915 | |
| 2916 | while (lib) |
| 2917 | { |
| 2918 | int len = strlen (lib->name); |
| 2919 | const char *filename = lbasename (abfd->filename); |
| 2920 | |
| 2921 | if (strcmp (lib->name, "ALL") == 0) |
| 2922 | { |
| 2923 | abfd->no_export = TRUE; |
| 2924 | return; |
| 2925 | } |
| 2926 | |
| 2927 | if (filename_ncmp (lib->name, filename, len) == 0 |
| 2928 | && (filename[len] == '\0' |
| 2929 | || (filename[len] == '.' && filename[len + 1] == 'a' |
| 2930 | && filename[len + 2] == '\0'))) |
| 2931 | { |
| 2932 | abfd->no_export = TRUE; |
| 2933 | return; |
| 2934 | } |
| 2935 | |
| 2936 | lib = lib->next; |
| 2937 | } |
| 2938 | } |
| 2939 | |
| 2940 | /* Get the symbols for an input file. */ |
| 2941 | |
| 2942 | bfd_boolean |
| 2943 | load_symbols (lang_input_statement_type *entry, |
| 2944 | lang_statement_list_type *place) |
| 2945 | { |
| 2946 | char **matching; |
| 2947 | |
| 2948 | if (entry->flags.loaded) |
| 2949 | return TRUE; |
| 2950 | |
| 2951 | ldfile_open_file (entry); |
| 2952 | |
| 2953 | /* Do not process further if the file was missing. */ |
| 2954 | if (entry->flags.missing_file) |
| 2955 | return TRUE; |
| 2956 | |
| 2957 | if (trace_files || verbose) |
| 2958 | info_msg ("%pI\n", entry); |
| 2959 | |
| 2960 | if (!bfd_check_format (entry->the_bfd, bfd_archive) |
| 2961 | && !bfd_check_format_matches (entry->the_bfd, bfd_object, &matching)) |
| 2962 | { |
| 2963 | bfd_error_type err; |
| 2964 | struct lang_input_statement_flags save_flags; |
| 2965 | extern FILE *yyin; |
| 2966 | |
| 2967 | err = bfd_get_error (); |
| 2968 | |
| 2969 | /* See if the emulation has some special knowledge. */ |
| 2970 | if (ldemul_unrecognized_file (entry)) |
| 2971 | return TRUE; |
| 2972 | |
| 2973 | if (err == bfd_error_file_ambiguously_recognized) |
| 2974 | { |
| 2975 | char **p; |
| 2976 | |
| 2977 | einfo (_("%P: %pB: file not recognized: %E;" |
| 2978 | " matching formats:"), entry->the_bfd); |
| 2979 | for (p = matching; *p != NULL; p++) |
| 2980 | einfo (" %s", *p); |
| 2981 | einfo ("%F\n"); |
| 2982 | } |
| 2983 | else if (err != bfd_error_file_not_recognized |
| 2984 | || place == NULL) |
| 2985 | einfo (_("%F%P: %pB: file not recognized: %E\n"), entry->the_bfd); |
| 2986 | |
| 2987 | bfd_close (entry->the_bfd); |
| 2988 | entry->the_bfd = NULL; |
| 2989 | |
| 2990 | /* Try to interpret the file as a linker script. */ |
| 2991 | save_flags = input_flags; |
| 2992 | ldfile_open_command_file (entry->filename); |
| 2993 | |
| 2994 | push_stat_ptr (place); |
| 2995 | input_flags.add_DT_NEEDED_for_regular |
| 2996 | = entry->flags.add_DT_NEEDED_for_regular; |
| 2997 | input_flags.add_DT_NEEDED_for_dynamic |
| 2998 | = entry->flags.add_DT_NEEDED_for_dynamic; |
| 2999 | input_flags.whole_archive = entry->flags.whole_archive; |
| 3000 | input_flags.dynamic = entry->flags.dynamic; |
| 3001 | |
| 3002 | ldfile_assumed_script = TRUE; |
| 3003 | parser_input = input_script; |
| 3004 | yyparse (); |
| 3005 | ldfile_assumed_script = FALSE; |
| 3006 | |
| 3007 | /* missing_file is sticky. sysrooted will already have been |
| 3008 | restored when seeing EOF in yyparse, but no harm to restore |
| 3009 | again. */ |
| 3010 | save_flags.missing_file |= input_flags.missing_file; |
| 3011 | input_flags = save_flags; |
| 3012 | pop_stat_ptr (); |
| 3013 | fclose (yyin); |
| 3014 | yyin = NULL; |
| 3015 | entry->flags.loaded = TRUE; |
| 3016 | |
| 3017 | return TRUE; |
| 3018 | } |
| 3019 | |
| 3020 | if (ldemul_recognized_file (entry)) |
| 3021 | return TRUE; |
| 3022 | |
| 3023 | /* We don't call ldlang_add_file for an archive. Instead, the |
| 3024 | add_symbols entry point will call ldlang_add_file, via the |
| 3025 | add_archive_element callback, for each element of the archive |
| 3026 | which is used. */ |
| 3027 | switch (bfd_get_format (entry->the_bfd)) |
| 3028 | { |
| 3029 | default: |
| 3030 | break; |
| 3031 | |
| 3032 | case bfd_object: |
| 3033 | if (!entry->flags.reload) |
| 3034 | ldlang_add_file (entry); |
| 3035 | break; |
| 3036 | |
| 3037 | case bfd_archive: |
| 3038 | check_excluded_libs (entry->the_bfd); |
| 3039 | |
| 3040 | entry->the_bfd->usrdata = entry; |
| 3041 | if (entry->flags.whole_archive) |
| 3042 | { |
| 3043 | bfd *member = NULL; |
| 3044 | bfd_boolean loaded = TRUE; |
| 3045 | |
| 3046 | for (;;) |
| 3047 | { |
| 3048 | bfd *subsbfd; |
| 3049 | member = bfd_openr_next_archived_file (entry->the_bfd, member); |
| 3050 | |
| 3051 | if (member == NULL) |
| 3052 | break; |
| 3053 | |
| 3054 | if (!bfd_check_format (member, bfd_object)) |
| 3055 | { |
| 3056 | einfo (_("%F%P: %pB: member %pB in archive is not an object\n"), |
| 3057 | entry->the_bfd, member); |
| 3058 | loaded = FALSE; |
| 3059 | } |
| 3060 | |
| 3061 | subsbfd = member; |
| 3062 | if (!(*link_info.callbacks |
| 3063 | ->add_archive_element) (&link_info, member, |
| 3064 | "--whole-archive", &subsbfd)) |
| 3065 | abort (); |
| 3066 | |
| 3067 | /* Potentially, the add_archive_element hook may have set a |
| 3068 | substitute BFD for us. */ |
| 3069 | if (!bfd_link_add_symbols (subsbfd, &link_info)) |
| 3070 | { |
| 3071 | einfo (_("%F%P: %pB: error adding symbols: %E\n"), member); |
| 3072 | loaded = FALSE; |
| 3073 | } |
| 3074 | } |
| 3075 | |
| 3076 | entry->flags.loaded = loaded; |
| 3077 | return loaded; |
| 3078 | } |
| 3079 | break; |
| 3080 | } |
| 3081 | |
| 3082 | if (bfd_link_add_symbols (entry->the_bfd, &link_info)) |
| 3083 | entry->flags.loaded = TRUE; |
| 3084 | else |
| 3085 | einfo (_("%F%P: %pB: error adding symbols: %E\n"), entry->the_bfd); |
| 3086 | |
| 3087 | return entry->flags.loaded; |
| 3088 | } |
| 3089 | |
| 3090 | /* Handle a wild statement. S->FILENAME or S->SECTION_LIST or both |
| 3091 | may be NULL, indicating that it is a wildcard. Separate |
| 3092 | lang_input_section statements are created for each part of the |
| 3093 | expansion; they are added after the wild statement S. OUTPUT is |
| 3094 | the output section. */ |
| 3095 | |
| 3096 | static void |
| 3097 | wild (lang_wild_statement_type *s, |
| 3098 | const char *target ATTRIBUTE_UNUSED, |
| 3099 | lang_output_section_statement_type *output) |
| 3100 | { |
| 3101 | struct wildcard_list *sec; |
| 3102 | |
| 3103 | if (s->handler_data[0] |
| 3104 | && s->handler_data[0]->spec.sorted == by_name |
| 3105 | && !s->filenames_sorted) |
| 3106 | { |
| 3107 | lang_section_bst_type *tree; |
| 3108 | |
| 3109 | walk_wild (s, output_section_callback_fast, output); |
| 3110 | |
| 3111 | tree = s->tree; |
| 3112 | if (tree) |
| 3113 | { |
| 3114 | output_section_callback_tree_to_list (s, tree, output); |
| 3115 | s->tree = NULL; |
| 3116 | } |
| 3117 | } |
| 3118 | else |
| 3119 | walk_wild (s, output_section_callback, output); |
| 3120 | |
| 3121 | if (default_common_section == NULL) |
| 3122 | for (sec = s->section_list; sec != NULL; sec = sec->next) |
| 3123 | if (sec->spec.name != NULL && strcmp (sec->spec.name, "COMMON") == 0) |
| 3124 | { |
| 3125 | /* Remember the section that common is going to in case we |
| 3126 | later get something which doesn't know where to put it. */ |
| 3127 | default_common_section = output; |
| 3128 | break; |
| 3129 | } |
| 3130 | } |
| 3131 | |
| 3132 | /* Return TRUE iff target is the sought target. */ |
| 3133 | |
| 3134 | static int |
| 3135 | get_target (const bfd_target *target, void *data) |
| 3136 | { |
| 3137 | const char *sought = (const char *) data; |
| 3138 | |
| 3139 | return strcmp (target->name, sought) == 0; |
| 3140 | } |
| 3141 | |
| 3142 | /* Like strcpy() but convert to lower case as well. */ |
| 3143 | |
| 3144 | static void |
| 3145 | stricpy (char *dest, char *src) |
| 3146 | { |
| 3147 | char c; |
| 3148 | |
| 3149 | while ((c = *src++) != 0) |
| 3150 | *dest++ = TOLOWER (c); |
| 3151 | |
| 3152 | *dest = 0; |
| 3153 | } |
| 3154 | |
| 3155 | /* Remove the first occurrence of needle (if any) in haystack |
| 3156 | from haystack. */ |
| 3157 | |
| 3158 | static void |
| 3159 | strcut (char *haystack, char *needle) |
| 3160 | { |
| 3161 | haystack = strstr (haystack, needle); |
| 3162 | |
| 3163 | if (haystack) |
| 3164 | { |
| 3165 | char *src; |
| 3166 | |
| 3167 | for (src = haystack + strlen (needle); *src;) |
| 3168 | *haystack++ = *src++; |
| 3169 | |
| 3170 | *haystack = 0; |
| 3171 | } |
| 3172 | } |
| 3173 | |
| 3174 | /* Compare two target format name strings. |
| 3175 | Return a value indicating how "similar" they are. */ |
| 3176 | |
| 3177 | static int |
| 3178 | name_compare (char *first, char *second) |
| 3179 | { |
| 3180 | char *copy1; |
| 3181 | char *copy2; |
| 3182 | int result; |
| 3183 | |
| 3184 | copy1 = (char *) xmalloc (strlen (first) + 1); |
| 3185 | copy2 = (char *) xmalloc (strlen (second) + 1); |
| 3186 | |
| 3187 | /* Convert the names to lower case. */ |
| 3188 | stricpy (copy1, first); |
| 3189 | stricpy (copy2, second); |
| 3190 | |
| 3191 | /* Remove size and endian strings from the name. */ |
| 3192 | strcut (copy1, "big"); |
| 3193 | strcut (copy1, "little"); |
| 3194 | strcut (copy2, "big"); |
| 3195 | strcut (copy2, "little"); |
| 3196 | |
| 3197 | /* Return a value based on how many characters match, |
| 3198 | starting from the beginning. If both strings are |
| 3199 | the same then return 10 * their length. */ |
| 3200 | for (result = 0; copy1[result] == copy2[result]; result++) |
| 3201 | if (copy1[result] == 0) |
| 3202 | { |
| 3203 | result *= 10; |
| 3204 | break; |
| 3205 | } |
| 3206 | |
| 3207 | free (copy1); |
| 3208 | free (copy2); |
| 3209 | |
| 3210 | return result; |
| 3211 | } |
| 3212 | |
| 3213 | /* Set by closest_target_match() below. */ |
| 3214 | static const bfd_target *winner; |
| 3215 | |
| 3216 | /* Scan all the valid bfd targets looking for one that has the endianness |
| 3217 | requirement that was specified on the command line, and is the nearest |
| 3218 | match to the original output target. */ |
| 3219 | |
| 3220 | static int |
| 3221 | closest_target_match (const bfd_target *target, void *data) |
| 3222 | { |
| 3223 | const bfd_target *original = (const bfd_target *) data; |
| 3224 | |
| 3225 | if (command_line.endian == ENDIAN_BIG |
| 3226 | && target->byteorder != BFD_ENDIAN_BIG) |
| 3227 | return 0; |
| 3228 | |
| 3229 | if (command_line.endian == ENDIAN_LITTLE |
| 3230 | && target->byteorder != BFD_ENDIAN_LITTLE) |
| 3231 | return 0; |
| 3232 | |
| 3233 | /* Must be the same flavour. */ |
| 3234 | if (target->flavour != original->flavour) |
| 3235 | return 0; |
| 3236 | |
| 3237 | /* Ignore generic big and little endian elf vectors. */ |
| 3238 | if (strcmp (target->name, "elf32-big") == 0 |
| 3239 | || strcmp (target->name, "elf64-big") == 0 |
| 3240 | || strcmp (target->name, "elf32-little") == 0 |
| 3241 | || strcmp (target->name, "elf64-little") == 0) |
| 3242 | return 0; |
| 3243 | |
| 3244 | /* If we have not found a potential winner yet, then record this one. */ |
| 3245 | if (winner == NULL) |
| 3246 | { |
| 3247 | winner = target; |
| 3248 | return 0; |
| 3249 | } |
| 3250 | |
| 3251 | /* Oh dear, we now have two potential candidates for a successful match. |
| 3252 | Compare their names and choose the better one. */ |
| 3253 | if (name_compare (target->name, original->name) |
| 3254 | > name_compare (winner->name, original->name)) |
| 3255 | winner = target; |
| 3256 | |
| 3257 | /* Keep on searching until wqe have checked them all. */ |
| 3258 | return 0; |
| 3259 | } |
| 3260 | |
| 3261 | /* Return the BFD target format of the first input file. */ |
| 3262 | |
| 3263 | static char * |
| 3264 | get_first_input_target (void) |
| 3265 | { |
| 3266 | char *target = NULL; |
| 3267 | |
| 3268 | LANG_FOR_EACH_INPUT_STATEMENT (s) |
| 3269 | { |
| 3270 | if (s->header.type == lang_input_statement_enum |
| 3271 | && s->flags.real) |
| 3272 | { |
| 3273 | ldfile_open_file (s); |
| 3274 | |
| 3275 | if (s->the_bfd != NULL |
| 3276 | && bfd_check_format (s->the_bfd, bfd_object)) |
| 3277 | { |
| 3278 | target = bfd_get_target (s->the_bfd); |
| 3279 | |
| 3280 | if (target != NULL) |
| 3281 | break; |
| 3282 | } |
| 3283 | } |
| 3284 | } |
| 3285 | |
| 3286 | return target; |
| 3287 | } |
| 3288 | |
| 3289 | const char * |
| 3290 | lang_get_output_target (void) |
| 3291 | { |
| 3292 | const char *target; |
| 3293 | |
| 3294 | /* Has the user told us which output format to use? */ |
| 3295 | if (output_target != NULL) |
| 3296 | return output_target; |
| 3297 | |
| 3298 | /* No - has the current target been set to something other than |
| 3299 | the default? */ |
| 3300 | if (current_target != default_target && current_target != NULL) |
| 3301 | return current_target; |
| 3302 | |
| 3303 | /* No - can we determine the format of the first input file? */ |
| 3304 | target = get_first_input_target (); |
| 3305 | if (target != NULL) |
| 3306 | return target; |
| 3307 | |
| 3308 | /* Failed - use the default output target. */ |
| 3309 | return default_target; |
| 3310 | } |
| 3311 | |
| 3312 | /* Open the output file. */ |
| 3313 | |
| 3314 | static void |
| 3315 | open_output (const char *name) |
| 3316 | { |
| 3317 | output_target = lang_get_output_target (); |
| 3318 | |
| 3319 | /* Has the user requested a particular endianness on the command |
| 3320 | line? */ |
| 3321 | if (command_line.endian != ENDIAN_UNSET) |
| 3322 | { |
| 3323 | /* Get the chosen target. */ |
| 3324 | const bfd_target *target |
| 3325 | = bfd_iterate_over_targets (get_target, (void *) output_target); |
| 3326 | |
| 3327 | /* If the target is not supported, we cannot do anything. */ |
| 3328 | if (target != NULL) |
| 3329 | { |
| 3330 | enum bfd_endian desired_endian; |
| 3331 | |
| 3332 | if (command_line.endian == ENDIAN_BIG) |
| 3333 | desired_endian = BFD_ENDIAN_BIG; |
| 3334 | else |
| 3335 | desired_endian = BFD_ENDIAN_LITTLE; |
| 3336 | |
| 3337 | /* See if the target has the wrong endianness. This should |
| 3338 | not happen if the linker script has provided big and |
| 3339 | little endian alternatives, but some scrips don't do |
| 3340 | this. */ |
| 3341 | if (target->byteorder != desired_endian) |
| 3342 | { |
| 3343 | /* If it does, then see if the target provides |
| 3344 | an alternative with the correct endianness. */ |
| 3345 | if (target->alternative_target != NULL |
| 3346 | && (target->alternative_target->byteorder == desired_endian)) |
| 3347 | output_target = target->alternative_target->name; |
| 3348 | else |
| 3349 | { |
| 3350 | /* Try to find a target as similar as possible to |
| 3351 | the default target, but which has the desired |
| 3352 | endian characteristic. */ |
| 3353 | bfd_iterate_over_targets (closest_target_match, |
| 3354 | (void *) target); |
| 3355 | |
| 3356 | /* Oh dear - we could not find any targets that |
| 3357 | satisfy our requirements. */ |
| 3358 | if (winner == NULL) |
| 3359 | einfo (_("%P: warning: could not find any targets" |
| 3360 | " that match endianness requirement\n")); |
| 3361 | else |
| 3362 | output_target = winner->name; |
| 3363 | } |
| 3364 | } |
| 3365 | } |
| 3366 | } |
| 3367 | |
| 3368 | link_info.output_bfd = bfd_openw (name, output_target); |
| 3369 | |
| 3370 | if (link_info.output_bfd == NULL) |
| 3371 | { |
| 3372 | if (bfd_get_error () == bfd_error_invalid_target) |
| 3373 | einfo (_("%F%P: target %s not found\n"), output_target); |
| 3374 | |
| 3375 | einfo (_("%F%P: cannot open output file %s: %E\n"), name); |
| 3376 | } |
| 3377 | |
| 3378 | delete_output_file_on_failure = TRUE; |
| 3379 | |
| 3380 | if (!bfd_set_format (link_info.output_bfd, bfd_object)) |
| 3381 | einfo (_("%F%P: %s: can not make object file: %E\n"), name); |
| 3382 | if (!bfd_set_arch_mach (link_info.output_bfd, |
| 3383 | ldfile_output_architecture, |
| 3384 | ldfile_output_machine)) |
| 3385 | einfo (_("%F%P: %s: can not set architecture: %E\n"), name); |
| 3386 | |
| 3387 | link_info.hash = bfd_link_hash_table_create (link_info.output_bfd); |
| 3388 | if (link_info.hash == NULL) |
| 3389 | einfo (_("%F%P: can not create hash table: %E\n")); |
| 3390 | |
| 3391 | bfd_set_gp_size (link_info.output_bfd, g_switch_value); |
| 3392 | } |
| 3393 | |
| 3394 | static void |
| 3395 | ldlang_open_output (lang_statement_union_type *statement) |
| 3396 | { |
| 3397 | switch (statement->header.type) |
| 3398 | { |
| 3399 | case lang_output_statement_enum: |
| 3400 | ASSERT (link_info.output_bfd == NULL); |
| 3401 | open_output (statement->output_statement.name); |
| 3402 | ldemul_set_output_arch (); |
| 3403 | if (config.magic_demand_paged |
| 3404 | && !bfd_link_relocatable (&link_info)) |
| 3405 | link_info.output_bfd->flags |= D_PAGED; |
| 3406 | else |
| 3407 | link_info.output_bfd->flags &= ~D_PAGED; |
| 3408 | if (config.text_read_only) |
| 3409 | link_info.output_bfd->flags |= WP_TEXT; |
| 3410 | else |
| 3411 | link_info.output_bfd->flags &= ~WP_TEXT; |
| 3412 | if (link_info.traditional_format) |
| 3413 | link_info.output_bfd->flags |= BFD_TRADITIONAL_FORMAT; |
| 3414 | else |
| 3415 | link_info.output_bfd->flags &= ~BFD_TRADITIONAL_FORMAT; |
| 3416 | break; |
| 3417 | |
| 3418 | case lang_target_statement_enum: |
| 3419 | current_target = statement->target_statement.target; |
| 3420 | break; |
| 3421 | default: |
| 3422 | break; |
| 3423 | } |
| 3424 | } |
| 3425 | |
| 3426 | static void |
| 3427 | init_opb (void) |
| 3428 | { |
| 3429 | unsigned x = bfd_arch_mach_octets_per_byte (ldfile_output_architecture, |
| 3430 | ldfile_output_machine); |
| 3431 | opb_shift = 0; |
| 3432 | if (x > 1) |
| 3433 | while ((x & 1) == 0) |
| 3434 | { |
| 3435 | x >>= 1; |
| 3436 | ++opb_shift; |
| 3437 | } |
| 3438 | ASSERT (x == 1); |
| 3439 | } |
| 3440 | |
| 3441 | /* Open all the input files. */ |
| 3442 | |
| 3443 | enum open_bfd_mode |
| 3444 | { |
| 3445 | OPEN_BFD_NORMAL = 0, |
| 3446 | OPEN_BFD_FORCE = 1, |
| 3447 | OPEN_BFD_RESCAN = 2 |
| 3448 | }; |
| 3449 | #ifdef ENABLE_PLUGINS |
| 3450 | static lang_input_statement_type *plugin_insert = NULL; |
| 3451 | #endif |
| 3452 | |
| 3453 | static void |
| 3454 | open_input_bfds (lang_statement_union_type *s, enum open_bfd_mode mode) |
| 3455 | { |
| 3456 | for (; s != NULL; s = s->header.next) |
| 3457 | { |
| 3458 | switch (s->header.type) |
| 3459 | { |
| 3460 | case lang_constructors_statement_enum: |
| 3461 | open_input_bfds (constructor_list.head, mode); |
| 3462 | break; |
| 3463 | case lang_output_section_statement_enum: |
| 3464 | open_input_bfds (s->output_section_statement.children.head, mode); |
| 3465 | break; |
| 3466 | case lang_wild_statement_enum: |
| 3467 | /* Maybe we should load the file's symbols. */ |
| 3468 | if ((mode & OPEN_BFD_RESCAN) == 0 |
| 3469 | && s->wild_statement.filename |
| 3470 | && !wildcardp (s->wild_statement.filename) |
| 3471 | && !archive_path (s->wild_statement.filename)) |
| 3472 | lookup_name (s->wild_statement.filename); |
| 3473 | open_input_bfds (s->wild_statement.children.head, mode); |
| 3474 | break; |
| 3475 | case lang_group_statement_enum: |
| 3476 | { |
| 3477 | struct bfd_link_hash_entry *undefs; |
| 3478 | |
| 3479 | /* We must continually search the entries in the group |
| 3480 | until no new symbols are added to the list of undefined |
| 3481 | symbols. */ |
| 3482 | |
| 3483 | do |
| 3484 | { |
| 3485 | undefs = link_info.hash->undefs_tail; |
| 3486 | open_input_bfds (s->group_statement.children.head, |
| 3487 | mode | OPEN_BFD_FORCE); |
| 3488 | } |
| 3489 | while (undefs != link_info.hash->undefs_tail); |
| 3490 | } |
| 3491 | break; |
| 3492 | case lang_target_statement_enum: |
| 3493 | current_target = s->target_statement.target; |
| 3494 | break; |
| 3495 | case lang_input_statement_enum: |
| 3496 | if (s->input_statement.flags.real) |
| 3497 | { |
| 3498 | lang_statement_union_type **os_tail; |
| 3499 | lang_statement_list_type add; |
| 3500 | bfd *abfd; |
| 3501 | |
| 3502 | s->input_statement.target = current_target; |
| 3503 | |
| 3504 | /* If we are being called from within a group, and this |
| 3505 | is an archive which has already been searched, then |
| 3506 | force it to be researched unless the whole archive |
| 3507 | has been loaded already. Do the same for a rescan. |
| 3508 | Likewise reload --as-needed shared libs. */ |
| 3509 | if (mode != OPEN_BFD_NORMAL |
| 3510 | #ifdef ENABLE_PLUGINS |
| 3511 | && ((mode & OPEN_BFD_RESCAN) == 0 |
| 3512 | || plugin_insert == NULL) |
| 3513 | #endif |
| 3514 | && s->input_statement.flags.loaded |
| 3515 | && (abfd = s->input_statement.the_bfd) != NULL |
| 3516 | && ((bfd_get_format (abfd) == bfd_archive |
| 3517 | && !s->input_statement.flags.whole_archive) |
| 3518 | || (bfd_get_format (abfd) == bfd_object |
| 3519 | && ((abfd->flags) & DYNAMIC) != 0 |
| 3520 | && s->input_statement.flags.add_DT_NEEDED_for_regular |
| 3521 | && bfd_get_flavour (abfd) == bfd_target_elf_flavour |
| 3522 | && (elf_dyn_lib_class (abfd) & DYN_AS_NEEDED) != 0))) |
| 3523 | { |
| 3524 | s->input_statement.flags.loaded = FALSE; |
| 3525 | s->input_statement.flags.reload = TRUE; |
| 3526 | } |
| 3527 | |
| 3528 | os_tail = lang_output_section_statement.tail; |
| 3529 | lang_list_init (&add); |
| 3530 | |
| 3531 | if (!load_symbols (&s->input_statement, &add)) |
| 3532 | config.make_executable = FALSE; |
| 3533 | |
| 3534 | if (add.head != NULL) |
| 3535 | { |
| 3536 | /* If this was a script with output sections then |
| 3537 | tack any added statements on to the end of the |
| 3538 | list. This avoids having to reorder the output |
| 3539 | section statement list. Very likely the user |
| 3540 | forgot -T, and whatever we do here will not meet |
| 3541 | naive user expectations. */ |
| 3542 | if (os_tail != lang_output_section_statement.tail) |
| 3543 | { |
| 3544 | einfo (_("%P: warning: %s contains output sections;" |
| 3545 | " did you forget -T?\n"), |
| 3546 | s->input_statement.filename); |
| 3547 | *stat_ptr->tail = add.head; |
| 3548 | stat_ptr->tail = add.tail; |
| 3549 | } |
| 3550 | else |
| 3551 | { |
| 3552 | *add.tail = s->header.next; |
| 3553 | s->header.next = add.head; |
| 3554 | } |
| 3555 | } |
| 3556 | } |
| 3557 | #ifdef ENABLE_PLUGINS |
| 3558 | /* If we have found the point at which a plugin added new |
| 3559 | files, clear plugin_insert to enable archive rescan. */ |
| 3560 | if (&s->input_statement == plugin_insert) |
| 3561 | plugin_insert = NULL; |
| 3562 | #endif |
| 3563 | break; |
| 3564 | case lang_assignment_statement_enum: |
| 3565 | if (s->assignment_statement.exp->type.node_class != etree_assert) |
| 3566 | exp_fold_tree_no_dot (s->assignment_statement.exp); |
| 3567 | break; |
| 3568 | default: |
| 3569 | break; |
| 3570 | } |
| 3571 | } |
| 3572 | |
| 3573 | /* Exit if any of the files were missing. */ |
| 3574 | if (input_flags.missing_file) |
| 3575 | einfo ("%F"); |
| 3576 | } |
| 3577 | |
| 3578 | /* Add the supplied name to the symbol table as an undefined reference. |
| 3579 | This is a two step process as the symbol table doesn't even exist at |
| 3580 | the time the ld command line is processed. First we put the name |
| 3581 | on a list, then, once the output file has been opened, transfer the |
| 3582 | name to the symbol table. */ |
| 3583 | |
| 3584 | typedef struct bfd_sym_chain ldlang_undef_chain_list_type; |
| 3585 | |
| 3586 | #define ldlang_undef_chain_list_head entry_symbol.next |
| 3587 | |
| 3588 | void |
| 3589 | ldlang_add_undef (const char *const name, bfd_boolean cmdline) |
| 3590 | { |
| 3591 | ldlang_undef_chain_list_type *new_undef; |
| 3592 | |
| 3593 | undef_from_cmdline = undef_from_cmdline || cmdline; |
| 3594 | new_undef = (ldlang_undef_chain_list_type *) stat_alloc (sizeof (*new_undef)); |
| 3595 | new_undef->next = ldlang_undef_chain_list_head; |
| 3596 | ldlang_undef_chain_list_head = new_undef; |
| 3597 | |
| 3598 | new_undef->name = xstrdup (name); |
| 3599 | |
| 3600 | if (link_info.output_bfd != NULL) |
| 3601 | insert_undefined (new_undef->name); |
| 3602 | } |
| 3603 | |
| 3604 | /* Insert NAME as undefined in the symbol table. */ |
| 3605 | |
| 3606 | static void |
| 3607 | insert_undefined (const char *name) |
| 3608 | { |
| 3609 | struct bfd_link_hash_entry *h; |
| 3610 | |
| 3611 | h = bfd_link_hash_lookup (link_info.hash, name, TRUE, FALSE, TRUE); |
| 3612 | if (h == NULL) |
| 3613 | einfo (_("%F%P: bfd_link_hash_lookup failed: %E\n")); |
| 3614 | if (h->type == bfd_link_hash_new) |
| 3615 | { |
| 3616 | h->type = bfd_link_hash_undefined; |
| 3617 | h->u.undef.abfd = NULL; |
| 3618 | h->non_ir_ref_regular = TRUE; |
| 3619 | if (is_elf_hash_table (link_info.hash)) |
| 3620 | ((struct elf_link_hash_entry *) h)->mark = 1; |
| 3621 | bfd_link_add_undef (link_info.hash, h); |
| 3622 | } |
| 3623 | } |
| 3624 | |
| 3625 | /* Run through the list of undefineds created above and place them |
| 3626 | into the linker hash table as undefined symbols belonging to the |
| 3627 | script file. */ |
| 3628 | |
| 3629 | static void |
| 3630 | lang_place_undefineds (void) |
| 3631 | { |
| 3632 | ldlang_undef_chain_list_type *ptr; |
| 3633 | |
| 3634 | for (ptr = ldlang_undef_chain_list_head; ptr != NULL; ptr = ptr->next) |
| 3635 | insert_undefined (ptr->name); |
| 3636 | } |
| 3637 | |
| 3638 | /* Structure used to build the list of symbols that the user has required |
| 3639 | be defined. */ |
| 3640 | |
| 3641 | struct require_defined_symbol |
| 3642 | { |
| 3643 | const char *name; |
| 3644 | struct require_defined_symbol *next; |
| 3645 | }; |
| 3646 | |
| 3647 | /* The list of symbols that the user has required be defined. */ |
| 3648 | |
| 3649 | static struct require_defined_symbol *require_defined_symbol_list; |
| 3650 | |
| 3651 | /* Add a new symbol NAME to the list of symbols that are required to be |
| 3652 | defined. */ |
| 3653 | |
| 3654 | void |
| 3655 | ldlang_add_require_defined (const char *const name) |
| 3656 | { |
| 3657 | struct require_defined_symbol *ptr; |
| 3658 | |
| 3659 | ldlang_add_undef (name, TRUE); |
| 3660 | ptr = (struct require_defined_symbol *) stat_alloc (sizeof (*ptr)); |
| 3661 | ptr->next = require_defined_symbol_list; |
| 3662 | ptr->name = strdup (name); |
| 3663 | require_defined_symbol_list = ptr; |
| 3664 | } |
| 3665 | |
| 3666 | /* Check that all symbols the user required to be defined, are defined, |
| 3667 | raise an error if we find a symbol that is not defined. */ |
| 3668 | |
| 3669 | static void |
| 3670 | ldlang_check_require_defined_symbols (void) |
| 3671 | { |
| 3672 | struct require_defined_symbol *ptr; |
| 3673 | |
| 3674 | for (ptr = require_defined_symbol_list; ptr != NULL; ptr = ptr->next) |
| 3675 | { |
| 3676 | struct bfd_link_hash_entry *h; |
| 3677 | |
| 3678 | h = bfd_link_hash_lookup (link_info.hash, ptr->name, |
| 3679 | FALSE, FALSE, TRUE); |
| 3680 | if (h == NULL |
| 3681 | || (h->type != bfd_link_hash_defined |
| 3682 | && h->type != bfd_link_hash_defweak)) |
| 3683 | einfo(_("%X%P: required symbol `%s' not defined\n"), ptr->name); |
| 3684 | } |
| 3685 | } |
| 3686 | |
| 3687 | /* Check for all readonly or some readwrite sections. */ |
| 3688 | |
| 3689 | static void |
| 3690 | check_input_sections |
| 3691 | (lang_statement_union_type *s, |
| 3692 | lang_output_section_statement_type *output_section_statement) |
| 3693 | { |
| 3694 | for (; s != (lang_statement_union_type *) NULL; s = s->header.next) |
| 3695 | { |
| 3696 | switch (s->header.type) |
| 3697 | { |
| 3698 | case lang_wild_statement_enum: |
| 3699 | walk_wild (&s->wild_statement, check_section_callback, |
| 3700 | output_section_statement); |
| 3701 | if (!output_section_statement->all_input_readonly) |
| 3702 | return; |
| 3703 | break; |
| 3704 | case lang_constructors_statement_enum: |
| 3705 | check_input_sections (constructor_list.head, |
| 3706 | output_section_statement); |
| 3707 | if (!output_section_statement->all_input_readonly) |
| 3708 | return; |
| 3709 | break; |
| 3710 | case lang_group_statement_enum: |
| 3711 | check_input_sections (s->group_statement.children.head, |
| 3712 | output_section_statement); |
| 3713 | if (!output_section_statement->all_input_readonly) |
| 3714 | return; |
| 3715 | break; |
| 3716 | default: |
| 3717 | break; |
| 3718 | } |
| 3719 | } |
| 3720 | } |
| 3721 | |
| 3722 | /* Update wildcard statements if needed. */ |
| 3723 | |
| 3724 | static void |
| 3725 | update_wild_statements (lang_statement_union_type *s) |
| 3726 | { |
| 3727 | struct wildcard_list *sec; |
| 3728 | |
| 3729 | switch (sort_section) |
| 3730 | { |
| 3731 | default: |
| 3732 | FAIL (); |
| 3733 | |
| 3734 | case none: |
| 3735 | break; |
| 3736 | |
| 3737 | case by_name: |
| 3738 | case by_alignment: |
| 3739 | for (; s != NULL; s = s->header.next) |
| 3740 | { |
| 3741 | switch (s->header.type) |
| 3742 | { |
| 3743 | default: |
| 3744 | break; |
| 3745 | |
| 3746 | case lang_wild_statement_enum: |
| 3747 | for (sec = s->wild_statement.section_list; sec != NULL; |
| 3748 | sec = sec->next) |
| 3749 | /* Don't sort .init/.fini sections. */ |
| 3750 | if (strcmp (sec->spec.name, ".init") != 0 |
| 3751 | && strcmp (sec->spec.name, ".fini") != 0) |
| 3752 | switch (sec->spec.sorted) |
| 3753 | { |
| 3754 | case none: |
| 3755 | sec->spec.sorted = sort_section; |
| 3756 | break; |
| 3757 | case by_name: |
| 3758 | if (sort_section == by_alignment) |
| 3759 | sec->spec.sorted = by_name_alignment; |
| 3760 | break; |
| 3761 | case by_alignment: |
| 3762 | if (sort_section == by_name) |
| 3763 | sec->spec.sorted = by_alignment_name; |
| 3764 | break; |
| 3765 | default: |
| 3766 | break; |
| 3767 | } |
| 3768 | break; |
| 3769 | |
| 3770 | case lang_constructors_statement_enum: |
| 3771 | update_wild_statements (constructor_list.head); |
| 3772 | break; |
| 3773 | |
| 3774 | case lang_output_section_statement_enum: |
| 3775 | update_wild_statements |
| 3776 | (s->output_section_statement.children.head); |
| 3777 | break; |
| 3778 | |
| 3779 | case lang_group_statement_enum: |
| 3780 | update_wild_statements (s->group_statement.children.head); |
| 3781 | break; |
| 3782 | } |
| 3783 | } |
| 3784 | break; |
| 3785 | } |
| 3786 | } |
| 3787 | |
| 3788 | /* Open input files and attach to output sections. */ |
| 3789 | |
| 3790 | static void |
| 3791 | map_input_to_output_sections |
| 3792 | (lang_statement_union_type *s, const char *target, |
| 3793 | lang_output_section_statement_type *os) |
| 3794 | { |
| 3795 | for (; s != NULL; s = s->header.next) |
| 3796 | { |
| 3797 | lang_output_section_statement_type *tos; |
| 3798 | flagword flags; |
| 3799 | |
| 3800 | switch (s->header.type) |
| 3801 | { |
| 3802 | case lang_wild_statement_enum: |
| 3803 | wild (&s->wild_statement, target, os); |
| 3804 | break; |
| 3805 | case lang_constructors_statement_enum: |
| 3806 | map_input_to_output_sections (constructor_list.head, |
| 3807 | target, |
| 3808 | os); |
| 3809 | break; |
| 3810 | case lang_output_section_statement_enum: |
| 3811 | tos = &s->output_section_statement; |
| 3812 | if (tos->constraint != 0) |
| 3813 | { |
| 3814 | if (tos->constraint != ONLY_IF_RW |
| 3815 | && tos->constraint != ONLY_IF_RO) |
| 3816 | break; |
| 3817 | tos->all_input_readonly = TRUE; |
| 3818 | check_input_sections (tos->children.head, tos); |
| 3819 | if (tos->all_input_readonly != (tos->constraint == ONLY_IF_RO)) |
| 3820 | { |
| 3821 | tos->constraint = -1; |
| 3822 | break; |
| 3823 | } |
| 3824 | } |
| 3825 | map_input_to_output_sections (tos->children.head, |
| 3826 | target, |
| 3827 | tos); |
| 3828 | break; |
| 3829 | case lang_output_statement_enum: |
| 3830 | break; |
| 3831 | case lang_target_statement_enum: |
| 3832 | target = s->target_statement.target; |
| 3833 | break; |
| 3834 | case lang_group_statement_enum: |
| 3835 | map_input_to_output_sections (s->group_statement.children.head, |
| 3836 | target, |
| 3837 | os); |
| 3838 | break; |
| 3839 | case lang_data_statement_enum: |
| 3840 | /* Make sure that any sections mentioned in the expression |
| 3841 | are initialized. */ |
| 3842 | exp_init_os (s->data_statement.exp); |
| 3843 | /* The output section gets CONTENTS, ALLOC and LOAD, but |
| 3844 | these may be overridden by the script. */ |
| 3845 | flags = SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD; |
| 3846 | switch (os->sectype) |
| 3847 | { |
| 3848 | case normal_section: |
| 3849 | case overlay_section: |
| 3850 | case first_overlay_section: |
| 3851 | break; |
| 3852 | case noalloc_section: |
| 3853 | flags = SEC_HAS_CONTENTS; |
| 3854 | break; |
| 3855 | case noload_section: |
| 3856 | if (bfd_get_flavour (link_info.output_bfd) |
| 3857 | == bfd_target_elf_flavour) |
| 3858 | flags = SEC_NEVER_LOAD | SEC_ALLOC; |
| 3859 | else |
| 3860 | flags = SEC_NEVER_LOAD | SEC_HAS_CONTENTS; |
| 3861 | break; |
| 3862 | } |
| 3863 | if (os->bfd_section == NULL) |
| 3864 | init_os (os, flags); |
| 3865 | else |
| 3866 | os->bfd_section->flags |= flags; |
| 3867 | break; |
| 3868 | case lang_input_section_enum: |
| 3869 | break; |
| 3870 | case lang_fill_statement_enum: |
| 3871 | case lang_object_symbols_statement_enum: |
| 3872 | case lang_reloc_statement_enum: |
| 3873 | case lang_padding_statement_enum: |
| 3874 | case lang_input_statement_enum: |
| 3875 | if (os != NULL && os->bfd_section == NULL) |
| 3876 | init_os (os, 0); |
| 3877 | break; |
| 3878 | case lang_assignment_statement_enum: |
| 3879 | if (os != NULL && os->bfd_section == NULL) |
| 3880 | init_os (os, 0); |
| 3881 | |
| 3882 | /* Make sure that any sections mentioned in the assignment |
| 3883 | are initialized. */ |
| 3884 | exp_init_os (s->assignment_statement.exp); |
| 3885 | break; |
| 3886 | case lang_address_statement_enum: |
| 3887 | /* Mark the specified section with the supplied address. |
| 3888 | If this section was actually a segment marker, then the |
| 3889 | directive is ignored if the linker script explicitly |
| 3890 | processed the segment marker. Originally, the linker |
| 3891 | treated segment directives (like -Ttext on the |
| 3892 | command-line) as section directives. We honor the |
| 3893 | section directive semantics for backwards compatibility; |
| 3894 | linker scripts that do not specifically check for |
| 3895 | SEGMENT_START automatically get the old semantics. */ |
| 3896 | if (!s->address_statement.segment |
| 3897 | || !s->address_statement.segment->used) |
| 3898 | { |
| 3899 | const char *name = s->address_statement.section_name; |
| 3900 | |
| 3901 | /* Create the output section statement here so that |
| 3902 | orphans with a set address will be placed after other |
| 3903 | script sections. If we let the orphan placement code |
| 3904 | place them in amongst other sections then the address |
| 3905 | will affect following script sections, which is |
| 3906 | likely to surprise naive users. */ |
| 3907 | tos = lang_output_section_statement_lookup (name, 0, TRUE); |
| 3908 | tos->addr_tree = s->address_statement.address; |
| 3909 | if (tos->bfd_section == NULL) |
| 3910 | init_os (tos, 0); |
| 3911 | } |
| 3912 | break; |
| 3913 | case lang_insert_statement_enum: |
| 3914 | break; |
| 3915 | } |
| 3916 | } |
| 3917 | } |
| 3918 | |
| 3919 | /* An insert statement snips out all the linker statements from the |
| 3920 | start of the list and places them after the output section |
| 3921 | statement specified by the insert. This operation is complicated |
| 3922 | by the fact that we keep a doubly linked list of output section |
| 3923 | statements as well as the singly linked list of all statements. */ |
| 3924 | |
| 3925 | static void |
| 3926 | process_insert_statements (void) |
| 3927 | { |
| 3928 | lang_statement_union_type **s; |
| 3929 | lang_output_section_statement_type *first_os = NULL; |
| 3930 | lang_output_section_statement_type *last_os = NULL; |
| 3931 | lang_output_section_statement_type *os; |
| 3932 | |
| 3933 | /* "start of list" is actually the statement immediately after |
| 3934 | the special abs_section output statement, so that it isn't |
| 3935 | reordered. */ |
| 3936 | s = &lang_output_section_statement.head; |
| 3937 | while (*(s = &(*s)->header.next) != NULL) |
| 3938 | { |
| 3939 | if ((*s)->header.type == lang_output_section_statement_enum) |
| 3940 | { |
| 3941 | /* Keep pointers to the first and last output section |
| 3942 | statement in the sequence we may be about to move. */ |
| 3943 | os = &(*s)->output_section_statement; |
| 3944 | |
| 3945 | ASSERT (last_os == NULL || last_os->next == os); |
| 3946 | last_os = os; |
| 3947 | |
| 3948 | /* Set constraint negative so that lang_output_section_find |
| 3949 | won't match this output section statement. At this |
| 3950 | stage in linking constraint has values in the range |
| 3951 | [-1, ONLY_IN_RW]. */ |
| 3952 | last_os->constraint = -2 - last_os->constraint; |
| 3953 | if (first_os == NULL) |
| 3954 | first_os = last_os; |
| 3955 | } |
| 3956 | else if ((*s)->header.type == lang_insert_statement_enum) |
| 3957 | { |
| 3958 | lang_insert_statement_type *i = &(*s)->insert_statement; |
| 3959 | lang_output_section_statement_type *where; |
| 3960 | lang_statement_union_type **ptr; |
| 3961 | lang_statement_union_type *first; |
| 3962 | |
| 3963 | where = lang_output_section_find (i->where); |
| 3964 | if (where != NULL && i->is_before) |
| 3965 | { |
| 3966 | do |
| 3967 | where = where->prev; |
| 3968 | while (where != NULL && where->constraint < 0); |
| 3969 | } |
| 3970 | if (where == NULL) |
| 3971 | { |
| 3972 | einfo (_("%F%P: %s not found for insert\n"), i->where); |
| 3973 | return; |
| 3974 | } |
| 3975 | |
| 3976 | /* Deal with reordering the output section statement list. */ |
| 3977 | if (last_os != NULL) |
| 3978 | { |
| 3979 | asection *first_sec, *last_sec; |
| 3980 | struct lang_output_section_statement_struct **next; |
| 3981 | |
| 3982 | /* Snip out the output sections we are moving. */ |
| 3983 | first_os->prev->next = last_os->next; |
| 3984 | if (last_os->next == NULL) |
| 3985 | { |
| 3986 | next = &first_os->prev->next; |
| 3987 | lang_output_section_statement.tail |
| 3988 | = (lang_statement_union_type **) next; |
| 3989 | } |
| 3990 | else |
| 3991 | last_os->next->prev = first_os->prev; |
| 3992 | /* Add them in at the new position. */ |
| 3993 | last_os->next = where->next; |
| 3994 | if (where->next == NULL) |
| 3995 | { |
| 3996 | next = &last_os->next; |
| 3997 | lang_output_section_statement.tail |
| 3998 | = (lang_statement_union_type **) next; |
| 3999 | } |
| 4000 | else |
| 4001 | where->next->prev = last_os; |
| 4002 | first_os->prev = where; |
| 4003 | where->next = first_os; |
| 4004 | |
| 4005 | /* Move the bfd sections in the same way. */ |
| 4006 | first_sec = NULL; |
| 4007 | last_sec = NULL; |
| 4008 | for (os = first_os; os != NULL; os = os->next) |
| 4009 | { |
| 4010 | os->constraint = -2 - os->constraint; |
| 4011 | if (os->bfd_section != NULL |
| 4012 | && os->bfd_section->owner != NULL) |
| 4013 | { |
| 4014 | last_sec = os->bfd_section; |
| 4015 | if (first_sec == NULL) |
| 4016 | first_sec = last_sec; |
| 4017 | } |
| 4018 | if (os == last_os) |
| 4019 | break; |
| 4020 | } |
| 4021 | if (last_sec != NULL) |
| 4022 | { |
| 4023 | asection *sec = where->bfd_section; |
| 4024 | if (sec == NULL) |
| 4025 | sec = output_prev_sec_find (where); |
| 4026 | |
| 4027 | /* The place we want to insert must come after the |
| 4028 | sections we are moving. So if we find no |
| 4029 | section or if the section is the same as our |
| 4030 | last section, then no move is needed. */ |
| 4031 | if (sec != NULL && sec != last_sec) |
| 4032 | { |
| 4033 | /* Trim them off. */ |
| 4034 | if (first_sec->prev != NULL) |
| 4035 | first_sec->prev->next = last_sec->next; |
| 4036 | else |
| 4037 | link_info.output_bfd->sections = last_sec->next; |
| 4038 | if (last_sec->next != NULL) |
| 4039 | last_sec->next->prev = first_sec->prev; |
| 4040 | else |
| 4041 | link_info.output_bfd->section_last = first_sec->prev; |
| 4042 | /* Add back. */ |
| 4043 | last_sec->next = sec->next; |
| 4044 | if (sec->next != NULL) |
| 4045 | sec->next->prev = last_sec; |
| 4046 | else |
| 4047 | link_info.output_bfd->section_last = last_sec; |
| 4048 | first_sec->prev = sec; |
| 4049 | sec->next = first_sec; |
| 4050 | } |
| 4051 | } |
| 4052 | |
| 4053 | first_os = NULL; |
| 4054 | last_os = NULL; |
| 4055 | } |
| 4056 | |
| 4057 | ptr = insert_os_after (where); |
| 4058 | /* Snip everything after the abs_section output statement we |
| 4059 | know is at the start of the list, up to and including |
| 4060 | the insert statement we are currently processing. */ |
| 4061 | first = lang_output_section_statement.head->header.next; |
| 4062 | lang_output_section_statement.head->header.next = (*s)->header.next; |
| 4063 | /* Add them back where they belong. */ |
| 4064 | *s = *ptr; |
| 4065 | if (*s == NULL) |
| 4066 | statement_list.tail = s; |
| 4067 | *ptr = first; |
| 4068 | s = &lang_output_section_statement.head; |
| 4069 | } |
| 4070 | } |
| 4071 | |
| 4072 | /* Undo constraint twiddling. */ |
| 4073 | for (os = first_os; os != NULL; os = os->next) |
| 4074 | { |
| 4075 | os->constraint = -2 - os->constraint; |
| 4076 | if (os == last_os) |
| 4077 | break; |
| 4078 | } |
| 4079 | } |
| 4080 | |
| 4081 | /* An output section might have been removed after its statement was |
| 4082 | added. For example, ldemul_before_allocation can remove dynamic |
| 4083 | sections if they turn out to be not needed. Clean them up here. */ |
| 4084 | |
| 4085 | void |
| 4086 | strip_excluded_output_sections (void) |
| 4087 | { |
| 4088 | lang_output_section_statement_type *os; |
| 4089 | |
| 4090 | /* Run lang_size_sections (if not already done). */ |
| 4091 | if (expld.phase != lang_mark_phase_enum) |
| 4092 | { |
| 4093 | expld.phase = lang_mark_phase_enum; |
| 4094 | expld.dataseg.phase = exp_seg_none; |
| 4095 | one_lang_size_sections_pass (NULL, FALSE); |
| 4096 | lang_reset_memory_regions (); |
| 4097 | } |
| 4098 | |
| 4099 | for (os = &lang_output_section_statement.head->output_section_statement; |
| 4100 | os != NULL; |
| 4101 | os = os->next) |
| 4102 | { |
| 4103 | asection *output_section; |
| 4104 | bfd_boolean exclude; |
| 4105 | |
| 4106 | if (os->constraint < 0) |
| 4107 | continue; |
| 4108 | |
| 4109 | output_section = os->bfd_section; |
| 4110 | if (output_section == NULL) |
| 4111 | continue; |
| 4112 | |
| 4113 | exclude = (output_section->rawsize == 0 |
| 4114 | && (output_section->flags & SEC_KEEP) == 0 |
| 4115 | && !bfd_section_removed_from_list (link_info.output_bfd, |
| 4116 | output_section)); |
| 4117 | |
| 4118 | /* Some sections have not yet been sized, notably .gnu.version, |
| 4119 | .dynsym, .dynstr and .hash. These all have SEC_LINKER_CREATED |
| 4120 | input sections, so don't drop output sections that have such |
| 4121 | input sections unless they are also marked SEC_EXCLUDE. */ |
| 4122 | if (exclude && output_section->map_head.s != NULL) |
| 4123 | { |
| 4124 | asection *s; |
| 4125 | |
| 4126 | for (s = output_section->map_head.s; s != NULL; s = s->map_head.s) |
| 4127 | if ((s->flags & SEC_EXCLUDE) == 0 |
| 4128 | && ((s->flags & SEC_LINKER_CREATED) != 0 |
| 4129 | || link_info.emitrelocations)) |
| 4130 | { |
| 4131 | exclude = FALSE; |
| 4132 | break; |
| 4133 | } |
| 4134 | } |
| 4135 | |
| 4136 | if (exclude) |
| 4137 | { |
| 4138 | /* We don't set bfd_section to NULL since bfd_section of the |
| 4139 | removed output section statement may still be used. */ |
| 4140 | if (!os->update_dot) |
| 4141 | os->ignored = TRUE; |
| 4142 | output_section->flags |= SEC_EXCLUDE; |
| 4143 | bfd_section_list_remove (link_info.output_bfd, output_section); |
| 4144 | link_info.output_bfd->section_count--; |
| 4145 | } |
| 4146 | } |
| 4147 | } |
| 4148 | |
| 4149 | /* Called from ldwrite to clear out asection.map_head and |
| 4150 | asection.map_tail for use as link_orders in ldwrite. */ |
| 4151 | |
| 4152 | void |
| 4153 | lang_clear_os_map (void) |
| 4154 | { |
| 4155 | lang_output_section_statement_type *os; |
| 4156 | |
| 4157 | if (map_head_is_link_order) |
| 4158 | return; |
| 4159 | |
| 4160 | for (os = &lang_output_section_statement.head->output_section_statement; |
| 4161 | os != NULL; |
| 4162 | os = os->next) |
| 4163 | { |
| 4164 | asection *output_section; |
| 4165 | |
| 4166 | if (os->constraint < 0) |
| 4167 | continue; |
| 4168 | |
| 4169 | output_section = os->bfd_section; |
| 4170 | if (output_section == NULL) |
| 4171 | continue; |
| 4172 | |
| 4173 | /* TODO: Don't just junk map_head.s, turn them into link_orders. */ |
| 4174 | output_section->map_head.link_order = NULL; |
| 4175 | output_section->map_tail.link_order = NULL; |
| 4176 | } |
| 4177 | |
| 4178 | /* Stop future calls to lang_add_section from messing with map_head |
| 4179 | and map_tail link_order fields. */ |
| 4180 | map_head_is_link_order = TRUE; |
| 4181 | } |
| 4182 | |
| 4183 | static void |
| 4184 | print_output_section_statement |
| 4185 | (lang_output_section_statement_type *output_section_statement) |
| 4186 | { |
| 4187 | asection *section = output_section_statement->bfd_section; |
| 4188 | int len; |
| 4189 | |
| 4190 | if (output_section_statement != abs_output_section) |
| 4191 | { |
| 4192 | minfo ("\n%s", output_section_statement->name); |
| 4193 | |
| 4194 | if (section != NULL) |
| 4195 | { |
| 4196 | print_dot = section->vma; |
| 4197 | |
| 4198 | len = strlen (output_section_statement->name); |
| 4199 | if (len >= SECTION_NAME_MAP_LENGTH - 1) |
| 4200 | { |
| 4201 | print_nl (); |
| 4202 | len = 0; |
| 4203 | } |
| 4204 | while (len < SECTION_NAME_MAP_LENGTH) |
| 4205 | { |
| 4206 | print_space (); |
| 4207 | ++len; |
| 4208 | } |
| 4209 | |
| 4210 | minfo ("0x%V %W", section->vma, TO_ADDR (section->size)); |
| 4211 | |
| 4212 | if (section->vma != section->lma) |
| 4213 | minfo (_(" load address 0x%V"), section->lma); |
| 4214 | |
| 4215 | if (output_section_statement->update_dot_tree != NULL) |
| 4216 | exp_fold_tree (output_section_statement->update_dot_tree, |
| 4217 | bfd_abs_section_ptr, &print_dot); |
| 4218 | } |
| 4219 | |
| 4220 | print_nl (); |
| 4221 | } |
| 4222 | |
| 4223 | print_statement_list (output_section_statement->children.head, |
| 4224 | output_section_statement); |
| 4225 | } |
| 4226 | |
| 4227 | static void |
| 4228 | print_assignment (lang_assignment_statement_type *assignment, |
| 4229 | lang_output_section_statement_type *output_section) |
| 4230 | { |
| 4231 | unsigned int i; |
| 4232 | bfd_boolean is_dot; |
| 4233 | etree_type *tree; |
| 4234 | asection *osec; |
| 4235 | |
| 4236 | for (i = 0; i < SECTION_NAME_MAP_LENGTH; i++) |
| 4237 | print_space (); |
| 4238 | |
| 4239 | if (assignment->exp->type.node_class == etree_assert) |
| 4240 | { |
| 4241 | is_dot = FALSE; |
| 4242 | tree = assignment->exp->assert_s.child; |
| 4243 | } |
| 4244 | else |
| 4245 | { |
| 4246 | const char *dst = assignment->exp->assign.dst; |
| 4247 | |
| 4248 | is_dot = (dst[0] == '.' && dst[1] == 0); |
| 4249 | tree = assignment->exp; |
| 4250 | } |
| 4251 | |
| 4252 | osec = output_section->bfd_section; |
| 4253 | if (osec == NULL) |
| 4254 | osec = bfd_abs_section_ptr; |
| 4255 | |
| 4256 | if (assignment->exp->type.node_class != etree_provide) |
| 4257 | exp_fold_tree (tree, osec, &print_dot); |
| 4258 | else |
| 4259 | expld.result.valid_p = FALSE; |
| 4260 | |
| 4261 | if (expld.result.valid_p) |
| 4262 | { |
| 4263 | bfd_vma value; |
| 4264 | |
| 4265 | if (assignment->exp->type.node_class == etree_assert |
| 4266 | || is_dot |
| 4267 | || expld.assign_name != NULL) |
| 4268 | { |
| 4269 | value = expld.result.value; |
| 4270 | |
| 4271 | if (expld.result.section != NULL) |
| 4272 | value += expld.result.section->vma; |
| 4273 | |
| 4274 | minfo ("0x%V", value); |
| 4275 | if (is_dot) |
| 4276 | print_dot = value; |
| 4277 | } |
| 4278 | else |
| 4279 | { |
| 4280 | struct bfd_link_hash_entry *h; |
| 4281 | |
| 4282 | h = bfd_link_hash_lookup (link_info.hash, assignment->exp->assign.dst, |
| 4283 | FALSE, FALSE, TRUE); |
| 4284 | if (h != NULL |
| 4285 | && (h->type == bfd_link_hash_defined |
| 4286 | || h->type == bfd_link_hash_defweak)) |
| 4287 | { |
| 4288 | value = h->u.def.value; |
| 4289 | value += h->u.def.section->output_section->vma; |
| 4290 | value += h->u.def.section->output_offset; |
| 4291 | |
| 4292 | minfo ("[0x%V]", value); |
| 4293 | } |
| 4294 | else |
| 4295 | minfo ("[unresolved]"); |
| 4296 | } |
| 4297 | } |
| 4298 | else |
| 4299 | { |
| 4300 | if (assignment->exp->type.node_class == etree_provide) |
| 4301 | minfo ("[!provide]"); |
| 4302 | else |
| 4303 | minfo ("*undef* "); |
| 4304 | #ifdef BFD64 |
| 4305 | minfo (" "); |
| 4306 | #endif |
| 4307 | } |
| 4308 | expld.assign_name = NULL; |
| 4309 | |
| 4310 | minfo (" "); |
| 4311 | exp_print_tree (assignment->exp); |
| 4312 | print_nl (); |
| 4313 | } |
| 4314 | |
| 4315 | static void |
| 4316 | print_input_statement (lang_input_statement_type *statm) |
| 4317 | { |
| 4318 | if (statm->filename != NULL |
| 4319 | && (statm->the_bfd == NULL |
| 4320 | || (statm->the_bfd->flags & BFD_LINKER_CREATED) == 0)) |
| 4321 | fprintf (config.map_file, "LOAD %s\n", statm->filename); |
| 4322 | } |
| 4323 | |
| 4324 | /* Print all symbols defined in a particular section. This is called |
| 4325 | via bfd_link_hash_traverse, or by print_all_symbols. */ |
| 4326 | |
| 4327 | static bfd_boolean |
| 4328 | print_one_symbol (struct bfd_link_hash_entry *hash_entry, void *ptr) |
| 4329 | { |
| 4330 | asection *sec = (asection *) ptr; |
| 4331 | |
| 4332 | if ((hash_entry->type == bfd_link_hash_defined |
| 4333 | || hash_entry->type == bfd_link_hash_defweak) |
| 4334 | && sec == hash_entry->u.def.section) |
| 4335 | { |
| 4336 | int i; |
| 4337 | |
| 4338 | for (i = 0; i < SECTION_NAME_MAP_LENGTH; i++) |
| 4339 | print_space (); |
| 4340 | minfo ("0x%V ", |
| 4341 | (hash_entry->u.def.value |
| 4342 | + hash_entry->u.def.section->output_offset |
| 4343 | + hash_entry->u.def.section->output_section->vma)); |
| 4344 | |
| 4345 | minfo (" %pT\n", hash_entry->root.string); |
| 4346 | } |
| 4347 | |
| 4348 | return TRUE; |
| 4349 | } |
| 4350 | |
| 4351 | static int |
| 4352 | hash_entry_addr_cmp (const void *a, const void *b) |
| 4353 | { |
| 4354 | const struct bfd_link_hash_entry *l = *(const struct bfd_link_hash_entry **)a; |
| 4355 | const struct bfd_link_hash_entry *r = *(const struct bfd_link_hash_entry **)b; |
| 4356 | |
| 4357 | if (l->u.def.value < r->u.def.value) |
| 4358 | return -1; |
| 4359 | else if (l->u.def.value > r->u.def.value) |
| 4360 | return 1; |
| 4361 | else |
| 4362 | return 0; |
| 4363 | } |
| 4364 | |
| 4365 | static void |
| 4366 | print_all_symbols (asection *sec) |
| 4367 | { |
| 4368 | input_section_userdata_type *ud |
| 4369 | = (input_section_userdata_type *) get_userdata (sec); |
| 4370 | struct map_symbol_def *def; |
| 4371 | struct bfd_link_hash_entry **entries; |
| 4372 | unsigned int i; |
| 4373 | |
| 4374 | if (!ud) |
| 4375 | return; |
| 4376 | |
| 4377 | *ud->map_symbol_def_tail = 0; |
| 4378 | |
| 4379 | /* Sort the symbols by address. */ |
| 4380 | entries = (struct bfd_link_hash_entry **) |
| 4381 | obstack_alloc (&map_obstack, |
| 4382 | ud->map_symbol_def_count * sizeof (*entries)); |
| 4383 | |
| 4384 | for (i = 0, def = ud->map_symbol_def_head; def; def = def->next, i++) |
| 4385 | entries[i] = def->entry; |
| 4386 | |
| 4387 | qsort (entries, ud->map_symbol_def_count, sizeof (*entries), |
| 4388 | hash_entry_addr_cmp); |
| 4389 | |
| 4390 | /* Print the symbols. */ |
| 4391 | for (i = 0; i < ud->map_symbol_def_count; i++) |
| 4392 | print_one_symbol (entries[i], sec); |
| 4393 | |
| 4394 | obstack_free (&map_obstack, entries); |
| 4395 | } |
| 4396 | |
| 4397 | /* Print information about an input section to the map file. */ |
| 4398 | |
| 4399 | static void |
| 4400 | print_input_section (asection *i, bfd_boolean is_discarded) |
| 4401 | { |
| 4402 | bfd_size_type size = i->size; |
| 4403 | int len; |
| 4404 | bfd_vma addr; |
| 4405 | |
| 4406 | init_opb (); |
| 4407 | |
| 4408 | print_space (); |
| 4409 | minfo ("%s", i->name); |
| 4410 | |
| 4411 | len = 1 + strlen (i->name); |
| 4412 | if (len >= SECTION_NAME_MAP_LENGTH - 1) |
| 4413 | { |
| 4414 | print_nl (); |
| 4415 | len = 0; |
| 4416 | } |
| 4417 | while (len < SECTION_NAME_MAP_LENGTH) |
| 4418 | { |
| 4419 | print_space (); |
| 4420 | ++len; |
| 4421 | } |
| 4422 | |
| 4423 | if (i->output_section != NULL |
| 4424 | && i->output_section->owner == link_info.output_bfd) |
| 4425 | addr = i->output_section->vma + i->output_offset; |
| 4426 | else |
| 4427 | { |
| 4428 | addr = print_dot; |
| 4429 | if (!is_discarded) |
| 4430 | size = 0; |
| 4431 | } |
| 4432 | |
| 4433 | minfo ("0x%V %W %pB\n", addr, size, i->owner); |
| 4434 | |
| 4435 | if (size != i->rawsize && i->rawsize != 0) |
| 4436 | { |
| 4437 | len = SECTION_NAME_MAP_LENGTH + 3; |
| 4438 | #ifdef BFD64 |
| 4439 | len += 16; |
| 4440 | #else |
| 4441 | len += 8; |
| 4442 | #endif |
| 4443 | while (len > 0) |
| 4444 | { |
| 4445 | print_space (); |
| 4446 | --len; |
| 4447 | } |
| 4448 | |
| 4449 | minfo (_("%W (size before relaxing)\n"), i->rawsize); |
| 4450 | } |
| 4451 | |
| 4452 | if (i->output_section != NULL |
| 4453 | && i->output_section->owner == link_info.output_bfd) |
| 4454 | { |
| 4455 | if (link_info.reduce_memory_overheads) |
| 4456 | bfd_link_hash_traverse (link_info.hash, print_one_symbol, i); |
| 4457 | else |
| 4458 | print_all_symbols (i); |
| 4459 | |
| 4460 | /* Update print_dot, but make sure that we do not move it |
| 4461 | backwards - this could happen if we have overlays and a |
| 4462 | later overlay is shorter than an earier one. */ |
| 4463 | if (addr + TO_ADDR (size) > print_dot) |
| 4464 | print_dot = addr + TO_ADDR (size); |
| 4465 | } |
| 4466 | } |
| 4467 | |
| 4468 | static void |
| 4469 | print_fill_statement (lang_fill_statement_type *fill) |
| 4470 | { |
| 4471 | size_t size; |
| 4472 | unsigned char *p; |
| 4473 | fputs (" FILL mask 0x", config.map_file); |
| 4474 | for (p = fill->fill->data, size = fill->fill->size; size != 0; p++, size--) |
| 4475 | fprintf (config.map_file, "%02x", *p); |
| 4476 | fputs ("\n", config.map_file); |
| 4477 | } |
| 4478 | |
| 4479 | static void |
| 4480 | print_data_statement (lang_data_statement_type *data) |
| 4481 | { |
| 4482 | int i; |
| 4483 | bfd_vma addr; |
| 4484 | bfd_size_type size; |
| 4485 | const char *name; |
| 4486 | |
| 4487 | init_opb (); |
| 4488 | for (i = 0; i < SECTION_NAME_MAP_LENGTH; i++) |
| 4489 | print_space (); |
| 4490 | |
| 4491 | addr = data->output_offset; |
| 4492 | if (data->output_section != NULL) |
| 4493 | addr += data->output_section->vma; |
| 4494 | |
| 4495 | switch (data->type) |
| 4496 | { |
| 4497 | default: |
| 4498 | abort (); |
| 4499 | case BYTE: |
| 4500 | size = BYTE_SIZE; |
| 4501 | name = "BYTE"; |
| 4502 | break; |
| 4503 | case SHORT: |
| 4504 | size = SHORT_SIZE; |
| 4505 | name = "SHORT"; |
| 4506 | break; |
| 4507 | case LONG: |
| 4508 | size = LONG_SIZE; |
| 4509 | name = "LONG"; |
| 4510 | break; |
| 4511 | case QUAD: |
| 4512 | size = QUAD_SIZE; |
| 4513 | name = "QUAD"; |
| 4514 | break; |
| 4515 | case SQUAD: |
| 4516 | size = QUAD_SIZE; |
| 4517 | name = "SQUAD"; |
| 4518 | break; |
| 4519 | } |
| 4520 | |
| 4521 | if (size < TO_SIZE ((unsigned) 1)) |
| 4522 | size = TO_SIZE ((unsigned) 1); |
| 4523 | minfo ("0x%V %W %s 0x%v", addr, TO_ADDR (size), name, data->value); |
| 4524 | |
| 4525 | if (data->exp->type.node_class != etree_value) |
| 4526 | { |
| 4527 | print_space (); |
| 4528 | exp_print_tree (data->exp); |
| 4529 | } |
| 4530 | |
| 4531 | print_nl (); |
| 4532 | |
| 4533 | print_dot = addr + TO_ADDR (size); |
| 4534 | } |
| 4535 | |
| 4536 | /* Print an address statement. These are generated by options like |
| 4537 | -Ttext. */ |
| 4538 | |
| 4539 | static void |
| 4540 | print_address_statement (lang_address_statement_type *address) |
| 4541 | { |
| 4542 | minfo (_("Address of section %s set to "), address->section_name); |
| 4543 | exp_print_tree (address->address); |
| 4544 | print_nl (); |
| 4545 | } |
| 4546 | |
| 4547 | /* Print a reloc statement. */ |
| 4548 | |
| 4549 | static void |
| 4550 | print_reloc_statement (lang_reloc_statement_type *reloc) |
| 4551 | { |
| 4552 | int i; |
| 4553 | bfd_vma addr; |
| 4554 | bfd_size_type size; |
| 4555 | |
| 4556 | init_opb (); |
| 4557 | for (i = 0; i < SECTION_NAME_MAP_LENGTH; i++) |
| 4558 | print_space (); |
| 4559 | |
| 4560 | addr = reloc->output_offset; |
| 4561 | if (reloc->output_section != NULL) |
| 4562 | addr += reloc->output_section->vma; |
| 4563 | |
| 4564 | size = bfd_get_reloc_size (reloc->howto); |
| 4565 | |
| 4566 | minfo ("0x%V %W RELOC %s ", addr, TO_ADDR (size), reloc->howto->name); |
| 4567 | |
| 4568 | if (reloc->name != NULL) |
| 4569 | minfo ("%s+", reloc->name); |
| 4570 | else |
| 4571 | minfo ("%s+", reloc->section->name); |
| 4572 | |
| 4573 | exp_print_tree (reloc->addend_exp); |
| 4574 | |
| 4575 | print_nl (); |
| 4576 | |
| 4577 | print_dot = addr + TO_ADDR (size); |
| 4578 | } |
| 4579 | |
| 4580 | static void |
| 4581 | print_padding_statement (lang_padding_statement_type *s) |
| 4582 | { |
| 4583 | int len; |
| 4584 | bfd_vma addr; |
| 4585 | |
| 4586 | init_opb (); |
| 4587 | minfo (" *fill*"); |
| 4588 | |
| 4589 | len = sizeof " *fill*" - 1; |
| 4590 | while (len < SECTION_NAME_MAP_LENGTH) |
| 4591 | { |
| 4592 | print_space (); |
| 4593 | ++len; |
| 4594 | } |
| 4595 | |
| 4596 | addr = s->output_offset; |
| 4597 | if (s->output_section != NULL) |
| 4598 | addr += s->output_section->vma; |
| 4599 | minfo ("0x%V %W ", addr, TO_ADDR (s->size)); |
| 4600 | |
| 4601 | if (s->fill->size != 0) |
| 4602 | { |
| 4603 | size_t size; |
| 4604 | unsigned char *p; |
| 4605 | for (p = s->fill->data, size = s->fill->size; size != 0; p++, size--) |
| 4606 | fprintf (config.map_file, "%02x", *p); |
| 4607 | } |
| 4608 | |
| 4609 | print_nl (); |
| 4610 | |
| 4611 | print_dot = addr + TO_ADDR (s->size); |
| 4612 | } |
| 4613 | |
| 4614 | static void |
| 4615 | print_wild_statement (lang_wild_statement_type *w, |
| 4616 | lang_output_section_statement_type *os) |
| 4617 | { |
| 4618 | struct wildcard_list *sec; |
| 4619 | |
| 4620 | print_space (); |
| 4621 | |
| 4622 | if (w->exclude_name_list) |
| 4623 | { |
| 4624 | name_list *tmp; |
| 4625 | minfo ("EXCLUDE_FILE(%s", w->exclude_name_list->name); |
| 4626 | for (tmp = w->exclude_name_list->next; tmp; tmp = tmp->next) |
| 4627 | minfo (" %s", tmp->name); |
| 4628 | minfo (") "); |
| 4629 | } |
| 4630 | |
| 4631 | if (w->filenames_sorted) |
| 4632 | minfo ("SORT_BY_NAME("); |
| 4633 | if (w->filename != NULL) |
| 4634 | minfo ("%s", w->filename); |
| 4635 | else |
| 4636 | minfo ("*"); |
| 4637 | if (w->filenames_sorted) |
| 4638 | minfo (")"); |
| 4639 | |
| 4640 | minfo ("("); |
| 4641 | for (sec = w->section_list; sec; sec = sec->next) |
| 4642 | { |
| 4643 | int closing_paren = 0; |
| 4644 | |
| 4645 | switch (sec->spec.sorted) |
| 4646 | { |
| 4647 | case none: |
| 4648 | break; |
| 4649 | |
| 4650 | case by_name: |
| 4651 | minfo ("SORT_BY_NAME("); |
| 4652 | closing_paren = 1; |
| 4653 | break; |
| 4654 | |
| 4655 | case by_alignment: |
| 4656 | minfo ("SORT_BY_ALIGNMENT("); |
| 4657 | closing_paren = 1; |
| 4658 | break; |
| 4659 | |
| 4660 | case by_name_alignment: |
| 4661 | minfo ("SORT_BY_NAME(SORT_BY_ALIGNMENT("); |
| 4662 | closing_paren = 2; |
| 4663 | break; |
| 4664 | |
| 4665 | case by_alignment_name: |
| 4666 | minfo ("SORT_BY_ALIGNMENT(SORT_BY_NAME("); |
| 4667 | closing_paren = 2; |
| 4668 | break; |
| 4669 | |
| 4670 | case by_none: |
| 4671 | minfo ("SORT_NONE("); |
| 4672 | closing_paren = 1; |
| 4673 | break; |
| 4674 | |
| 4675 | case by_init_priority: |
| 4676 | minfo ("SORT_BY_INIT_PRIORITY("); |
| 4677 | closing_paren = 1; |
| 4678 | break; |
| 4679 | } |
| 4680 | |
| 4681 | if (sec->spec.exclude_name_list != NULL) |
| 4682 | { |
| 4683 | name_list *tmp; |
| 4684 | minfo ("EXCLUDE_FILE(%s", sec->spec.exclude_name_list->name); |
| 4685 | for (tmp = sec->spec.exclude_name_list->next; tmp; tmp = tmp->next) |
| 4686 | minfo (" %s", tmp->name); |
| 4687 | minfo (") "); |
| 4688 | } |
| 4689 | if (sec->spec.name != NULL) |
| 4690 | minfo ("%s", sec->spec.name); |
| 4691 | else |
| 4692 | minfo ("*"); |
| 4693 | for (;closing_paren > 0; closing_paren--) |
| 4694 | minfo (")"); |
| 4695 | if (sec->next) |
| 4696 | minfo (" "); |
| 4697 | } |
| 4698 | minfo (")"); |
| 4699 | |
| 4700 | print_nl (); |
| 4701 | |
| 4702 | print_statement_list (w->children.head, os); |
| 4703 | } |
| 4704 | |
| 4705 | /* Print a group statement. */ |
| 4706 | |
| 4707 | static void |
| 4708 | print_group (lang_group_statement_type *s, |
| 4709 | lang_output_section_statement_type *os) |
| 4710 | { |
| 4711 | fprintf (config.map_file, "START GROUP\n"); |
| 4712 | print_statement_list (s->children.head, os); |
| 4713 | fprintf (config.map_file, "END GROUP\n"); |
| 4714 | } |
| 4715 | |
| 4716 | /* Print the list of statements in S. |
| 4717 | This can be called for any statement type. */ |
| 4718 | |
| 4719 | static void |
| 4720 | print_statement_list (lang_statement_union_type *s, |
| 4721 | lang_output_section_statement_type *os) |
| 4722 | { |
| 4723 | while (s != NULL) |
| 4724 | { |
| 4725 | print_statement (s, os); |
| 4726 | s = s->header.next; |
| 4727 | } |
| 4728 | } |
| 4729 | |
| 4730 | /* Print the first statement in statement list S. |
| 4731 | This can be called for any statement type. */ |
| 4732 | |
| 4733 | static void |
| 4734 | print_statement (lang_statement_union_type *s, |
| 4735 | lang_output_section_statement_type *os) |
| 4736 | { |
| 4737 | switch (s->header.type) |
| 4738 | { |
| 4739 | default: |
| 4740 | fprintf (config.map_file, _("Fail with %d\n"), s->header.type); |
| 4741 | FAIL (); |
| 4742 | break; |
| 4743 | case lang_constructors_statement_enum: |
| 4744 | if (constructor_list.head != NULL) |
| 4745 | { |
| 4746 | if (constructors_sorted) |
| 4747 | minfo (" SORT (CONSTRUCTORS)\n"); |
| 4748 | else |
| 4749 | minfo (" CONSTRUCTORS\n"); |
| 4750 | print_statement_list (constructor_list.head, os); |
| 4751 | } |
| 4752 | break; |
| 4753 | case lang_wild_statement_enum: |
| 4754 | print_wild_statement (&s->wild_statement, os); |
| 4755 | break; |
| 4756 | case lang_address_statement_enum: |
| 4757 | print_address_statement (&s->address_statement); |
| 4758 | break; |
| 4759 | case lang_object_symbols_statement_enum: |
| 4760 | minfo (" CREATE_OBJECT_SYMBOLS\n"); |
| 4761 | break; |
| 4762 | case lang_fill_statement_enum: |
| 4763 | print_fill_statement (&s->fill_statement); |
| 4764 | break; |
| 4765 | case lang_data_statement_enum: |
| 4766 | print_data_statement (&s->data_statement); |
| 4767 | break; |
| 4768 | case lang_reloc_statement_enum: |
| 4769 | print_reloc_statement (&s->reloc_statement); |
| 4770 | break; |
| 4771 | case lang_input_section_enum: |
| 4772 | print_input_section (s->input_section.section, FALSE); |
| 4773 | break; |
| 4774 | case lang_padding_statement_enum: |
| 4775 | print_padding_statement (&s->padding_statement); |
| 4776 | break; |
| 4777 | case lang_output_section_statement_enum: |
| 4778 | print_output_section_statement (&s->output_section_statement); |
| 4779 | break; |
| 4780 | case lang_assignment_statement_enum: |
| 4781 | print_assignment (&s->assignment_statement, os); |
| 4782 | break; |
| 4783 | case lang_target_statement_enum: |
| 4784 | fprintf (config.map_file, "TARGET(%s)\n", s->target_statement.target); |
| 4785 | break; |
| 4786 | case lang_output_statement_enum: |
| 4787 | minfo ("OUTPUT(%s", s->output_statement.name); |
| 4788 | if (output_target != NULL) |
| 4789 | minfo (" %s", output_target); |
| 4790 | minfo (")\n"); |
| 4791 | break; |
| 4792 | case lang_input_statement_enum: |
| 4793 | print_input_statement (&s->input_statement); |
| 4794 | break; |
| 4795 | case lang_group_statement_enum: |
| 4796 | print_group (&s->group_statement, os); |
| 4797 | break; |
| 4798 | case lang_insert_statement_enum: |
| 4799 | minfo ("INSERT %s %s\n", |
| 4800 | s->insert_statement.is_before ? "BEFORE" : "AFTER", |
| 4801 | s->insert_statement.where); |
| 4802 | break; |
| 4803 | } |
| 4804 | } |
| 4805 | |
| 4806 | static void |
| 4807 | print_statements (void) |
| 4808 | { |
| 4809 | print_statement_list (statement_list.head, abs_output_section); |
| 4810 | } |
| 4811 | |
| 4812 | /* Print the first N statements in statement list S to STDERR. |
| 4813 | If N == 0, nothing is printed. |
| 4814 | If N < 0, the entire list is printed. |
| 4815 | Intended to be called from GDB. */ |
| 4816 | |
| 4817 | void |
| 4818 | dprint_statement (lang_statement_union_type *s, int n) |
| 4819 | { |
| 4820 | FILE *map_save = config.map_file; |
| 4821 | |
| 4822 | config.map_file = stderr; |
| 4823 | |
| 4824 | if (n < 0) |
| 4825 | print_statement_list (s, abs_output_section); |
| 4826 | else |
| 4827 | { |
| 4828 | while (s && --n >= 0) |
| 4829 | { |
| 4830 | print_statement (s, abs_output_section); |
| 4831 | s = s->header.next; |
| 4832 | } |
| 4833 | } |
| 4834 | |
| 4835 | config.map_file = map_save; |
| 4836 | } |
| 4837 | |
| 4838 | static void |
| 4839 | insert_pad (lang_statement_union_type **ptr, |
| 4840 | fill_type *fill, |
| 4841 | bfd_size_type alignment_needed, |
| 4842 | asection *output_section, |
| 4843 | bfd_vma dot) |
| 4844 | { |
| 4845 | static fill_type zero_fill; |
| 4846 | lang_statement_union_type *pad = NULL; |
| 4847 | |
| 4848 | if (ptr != &statement_list.head) |
| 4849 | pad = ((lang_statement_union_type *) |
| 4850 | ((char *) ptr - offsetof (lang_statement_union_type, header.next))); |
| 4851 | if (pad != NULL |
| 4852 | && pad->header.type == lang_padding_statement_enum |
| 4853 | && pad->padding_statement.output_section == output_section) |
| 4854 | { |
| 4855 | /* Use the existing pad statement. */ |
| 4856 | } |
| 4857 | else if ((pad = *ptr) != NULL |
| 4858 | && pad->header.type == lang_padding_statement_enum |
| 4859 | && pad->padding_statement.output_section == output_section) |
| 4860 | { |
| 4861 | /* Use the existing pad statement. */ |
| 4862 | } |
| 4863 | else |
| 4864 | { |
| 4865 | /* Make a new padding statement, linked into existing chain. */ |
| 4866 | pad = (lang_statement_union_type *) |
| 4867 | stat_alloc (sizeof (lang_padding_statement_type)); |
| 4868 | pad->header.next = *ptr; |
| 4869 | *ptr = pad; |
| 4870 | pad->header.type = lang_padding_statement_enum; |
| 4871 | pad->padding_statement.output_section = output_section; |
| 4872 | if (fill == NULL) |
| 4873 | fill = &zero_fill; |
| 4874 | pad->padding_statement.fill = fill; |
| 4875 | } |
| 4876 | pad->padding_statement.output_offset = dot - output_section->vma; |
| 4877 | pad->padding_statement.size = alignment_needed; |
| 4878 | if (!(output_section->flags & SEC_FIXED_SIZE)) |
| 4879 | output_section->size = TO_SIZE (dot + TO_ADDR (alignment_needed) |
| 4880 | - output_section->vma); |
| 4881 | } |
| 4882 | |
| 4883 | /* Work out how much this section will move the dot point. */ |
| 4884 | |
| 4885 | static bfd_vma |
| 4886 | size_input_section |
| 4887 | (lang_statement_union_type **this_ptr, |
| 4888 | lang_output_section_statement_type *output_section_statement, |
| 4889 | fill_type *fill, |
| 4890 | bfd_vma dot) |
| 4891 | { |
| 4892 | lang_input_section_type *is = &((*this_ptr)->input_section); |
| 4893 | asection *i = is->section; |
| 4894 | asection *o = output_section_statement->bfd_section; |
| 4895 | |
| 4896 | if (i->sec_info_type == SEC_INFO_TYPE_JUST_SYMS) |
| 4897 | i->output_offset = i->vma - o->vma; |
| 4898 | else if (((i->flags & SEC_EXCLUDE) != 0) |
| 4899 | || output_section_statement->ignored) |
| 4900 | i->output_offset = dot - o->vma; |
| 4901 | else |
| 4902 | { |
| 4903 | bfd_size_type alignment_needed; |
| 4904 | |
| 4905 | /* Align this section first to the input sections requirement, |
| 4906 | then to the output section's requirement. If this alignment |
| 4907 | is greater than any seen before, then record it too. Perform |
| 4908 | the alignment by inserting a magic 'padding' statement. */ |
| 4909 | |
| 4910 | if (output_section_statement->subsection_alignment != NULL) |
| 4911 | i->alignment_power |
| 4912 | = exp_get_power (output_section_statement->subsection_alignment, |
| 4913 | "subsection alignment"); |
| 4914 | |
| 4915 | if (o->alignment_power < i->alignment_power) |
| 4916 | o->alignment_power = i->alignment_power; |
| 4917 | |
| 4918 | alignment_needed = align_power (dot, i->alignment_power) - dot; |
| 4919 | |
| 4920 | if (alignment_needed != 0) |
| 4921 | { |
| 4922 | insert_pad (this_ptr, fill, TO_SIZE (alignment_needed), o, dot); |
| 4923 | dot += alignment_needed; |
| 4924 | } |
| 4925 | |
| 4926 | /* Remember where in the output section this input section goes. */ |
| 4927 | i->output_offset = dot - o->vma; |
| 4928 | |
| 4929 | /* Mark how big the output section must be to contain this now. */ |
| 4930 | dot += TO_ADDR (i->size); |
| 4931 | if (!(o->flags & SEC_FIXED_SIZE)) |
| 4932 | o->size = TO_SIZE (dot - o->vma); |
| 4933 | } |
| 4934 | |
| 4935 | return dot; |
| 4936 | } |
| 4937 | |
| 4938 | struct check_sec |
| 4939 | { |
| 4940 | asection *sec; |
| 4941 | bfd_boolean warned; |
| 4942 | }; |
| 4943 | |
| 4944 | static int |
| 4945 | sort_sections_by_lma (const void *arg1, const void *arg2) |
| 4946 | { |
| 4947 | const asection *sec1 = ((const struct check_sec *) arg1)->sec; |
| 4948 | const asection *sec2 = ((const struct check_sec *) arg2)->sec; |
| 4949 | |
| 4950 | if (sec1->lma < sec2->lma) |
| 4951 | return -1; |
| 4952 | else if (sec1->lma > sec2->lma) |
| 4953 | return 1; |
| 4954 | else if (sec1->id < sec2->id) |
| 4955 | return -1; |
| 4956 | else if (sec1->id > sec2->id) |
| 4957 | return 1; |
| 4958 | |
| 4959 | return 0; |
| 4960 | } |
| 4961 | |
| 4962 | static int |
| 4963 | sort_sections_by_vma (const void *arg1, const void *arg2) |
| 4964 | { |
| 4965 | const asection *sec1 = ((const struct check_sec *) arg1)->sec; |
| 4966 | const asection *sec2 = ((const struct check_sec *) arg2)->sec; |
| 4967 | |
| 4968 | if (sec1->vma < sec2->vma) |
| 4969 | return -1; |
| 4970 | else if (sec1->vma > sec2->vma) |
| 4971 | return 1; |
| 4972 | else if (sec1->id < sec2->id) |
| 4973 | return -1; |
| 4974 | else if (sec1->id > sec2->id) |
| 4975 | return 1; |
| 4976 | |
| 4977 | return 0; |
| 4978 | } |
| 4979 | |
| 4980 | #define IS_TBSS(s) \ |
| 4981 | ((s->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) == SEC_THREAD_LOCAL) |
| 4982 | |
| 4983 | #define IGNORE_SECTION(s) \ |
| 4984 | ((s->flags & SEC_ALLOC) == 0 || IS_TBSS (s)) |
| 4985 | |
| 4986 | /* Check to see if any allocated sections overlap with other allocated |
| 4987 | sections. This can happen if a linker script specifies the output |
| 4988 | section addresses of the two sections. Also check whether any memory |
| 4989 | region has overflowed. */ |
| 4990 | |
| 4991 | static void |
| 4992 | lang_check_section_addresses (void) |
| 4993 | { |
| 4994 | asection *s, *p; |
| 4995 | struct check_sec *sections; |
| 4996 | size_t i, count; |
| 4997 | bfd_vma addr_mask; |
| 4998 | bfd_vma s_start; |
| 4999 | bfd_vma s_end; |
| 5000 | bfd_vma p_start = 0; |
| 5001 | bfd_vma p_end = 0; |
| 5002 | lang_memory_region_type *m; |
| 5003 | bfd_boolean overlays; |
| 5004 | |
| 5005 | /* Detect address space overflow on allocated sections. */ |
| 5006 | addr_mask = ((bfd_vma) 1 << |
| 5007 | (bfd_arch_bits_per_address (link_info.output_bfd) - 1)) - 1; |
| 5008 | addr_mask = (addr_mask << 1) + 1; |
| 5009 | for (s = link_info.output_bfd->sections; s != NULL; s = s->next) |
| 5010 | if ((s->flags & SEC_ALLOC) != 0) |
| 5011 | { |
| 5012 | s_end = (s->vma + s->size) & addr_mask; |
| 5013 | if (s_end != 0 && s_end < (s->vma & addr_mask)) |
| 5014 | einfo (_("%X%P: section %s VMA wraps around address space\n"), |
| 5015 | s->name); |
| 5016 | else |
| 5017 | { |
| 5018 | s_end = (s->lma + s->size) & addr_mask; |
| 5019 | if (s_end != 0 && s_end < (s->lma & addr_mask)) |
| 5020 | einfo (_("%X%P: section %s LMA wraps around address space\n"), |
| 5021 | s->name); |
| 5022 | } |
| 5023 | } |
| 5024 | |
| 5025 | if (bfd_count_sections (link_info.output_bfd) <= 1) |
| 5026 | return; |
| 5027 | |
| 5028 | count = bfd_count_sections (link_info.output_bfd); |
| 5029 | sections = XNEWVEC (struct check_sec, count); |
| 5030 | |
| 5031 | /* Scan all sections in the output list. */ |
| 5032 | count = 0; |
| 5033 | for (s = link_info.output_bfd->sections; s != NULL; s = s->next) |
| 5034 | { |
| 5035 | if (IGNORE_SECTION (s) |
| 5036 | || s->size == 0) |
| 5037 | continue; |
| 5038 | |
| 5039 | sections[count].sec = s; |
| 5040 | sections[count].warned = FALSE; |
| 5041 | count++; |
| 5042 | } |
| 5043 | |
| 5044 | if (count <= 1) |
| 5045 | { |
| 5046 | free (sections); |
| 5047 | return; |
| 5048 | } |
| 5049 | |
| 5050 | qsort (sections, count, sizeof (*sections), sort_sections_by_lma); |
| 5051 | |
| 5052 | /* First check section LMAs. There should be no overlap of LMAs on |
| 5053 | loadable sections, even with overlays. */ |
| 5054 | for (p = NULL, i = 0; i < count; i++) |
| 5055 | { |
| 5056 | s = sections[i].sec; |
| 5057 | if ((s->flags & SEC_LOAD) != 0) |
| 5058 | { |
| 5059 | s_start = s->lma; |
| 5060 | s_end = s_start + TO_ADDR (s->size) - 1; |
| 5061 | |
| 5062 | /* Look for an overlap. We have sorted sections by lma, so |
| 5063 | we know that s_start >= p_start. Besides the obvious |
| 5064 | case of overlap when the current section starts before |
| 5065 | the previous one ends, we also must have overlap if the |
| 5066 | previous section wraps around the address space. */ |
| 5067 | if (p != NULL |
| 5068 | && (s_start <= p_end |
| 5069 | || p_end < p_start)) |
| 5070 | { |
| 5071 | einfo (_("%X%P: section %s LMA [%V,%V]" |
| 5072 | " overlaps section %s LMA [%V,%V]\n"), |
| 5073 | s->name, s_start, s_end, p->name, p_start, p_end); |
| 5074 | sections[i].warned = TRUE; |
| 5075 | } |
| 5076 | p = s; |
| 5077 | p_start = s_start; |
| 5078 | p_end = s_end; |
| 5079 | } |
| 5080 | } |
| 5081 | |
| 5082 | /* If any non-zero size allocated section (excluding tbss) starts at |
| 5083 | exactly the same VMA as another such section, then we have |
| 5084 | overlays. Overlays generated by the OVERLAY keyword will have |
| 5085 | this property. It is possible to intentionally generate overlays |
| 5086 | that fail this test, but it would be unusual. */ |
| 5087 | qsort (sections, count, sizeof (*sections), sort_sections_by_vma); |
| 5088 | overlays = FALSE; |
| 5089 | p_start = sections[0].sec->vma; |
| 5090 | for (i = 1; i < count; i++) |
| 5091 | { |
| 5092 | s_start = sections[i].sec->vma; |
| 5093 | if (p_start == s_start) |
| 5094 | { |
| 5095 | overlays = TRUE; |
| 5096 | break; |
| 5097 | } |
| 5098 | p_start = s_start; |
| 5099 | } |
| 5100 | |
| 5101 | /* Now check section VMAs if no overlays were detected. */ |
| 5102 | if (!overlays) |
| 5103 | { |
| 5104 | for (p = NULL, i = 0; i < count; i++) |
| 5105 | { |
| 5106 | s = sections[i].sec; |
| 5107 | s_start = s->vma; |
| 5108 | s_end = s_start + TO_ADDR (s->size) - 1; |
| 5109 | |
| 5110 | if (p != NULL |
| 5111 | && !sections[i].warned |
| 5112 | && (s_start <= p_end |
| 5113 | || p_end < p_start)) |
| 5114 | einfo (_("%X%P: section %s VMA [%V,%V]" |
| 5115 | " overlaps section %s VMA [%V,%V]\n"), |
| 5116 | s->name, s_start, s_end, p->name, p_start, p_end); |
| 5117 | p = s; |
| 5118 | p_start = s_start; |
| 5119 | p_end = s_end; |
| 5120 | } |
| 5121 | } |
| 5122 | |
| 5123 | free (sections); |
| 5124 | |
| 5125 | /* If any memory region has overflowed, report by how much. |
| 5126 | We do not issue this diagnostic for regions that had sections |
| 5127 | explicitly placed outside their bounds; os_region_check's |
| 5128 | diagnostics are adequate for that case. |
| 5129 | |
| 5130 | FIXME: It is conceivable that m->current - (m->origin + m->length) |
| 5131 | might overflow a 32-bit integer. There is, alas, no way to print |
| 5132 | a bfd_vma quantity in decimal. */ |
| 5133 | for (m = lang_memory_region_list; m; m = m->next) |
| 5134 | if (m->had_full_message) |
| 5135 | { |
| 5136 | unsigned long over = m->current - (m->origin + m->length); |
| 5137 | einfo (ngettext ("%X%P: region `%s' overflowed by %lu byte\n", |
| 5138 | "%X%P: region `%s' overflowed by %lu bytes\n", |
| 5139 | over), |
| 5140 | m->name_list.name, over); |
| 5141 | } |
| 5142 | } |
| 5143 | |
| 5144 | /* Make sure the new address is within the region. We explicitly permit the |
| 5145 | current address to be at the exact end of the region when the address is |
| 5146 | non-zero, in case the region is at the end of addressable memory and the |
| 5147 | calculation wraps around. */ |
| 5148 | |
| 5149 | static void |
| 5150 | os_region_check (lang_output_section_statement_type *os, |
| 5151 | lang_memory_region_type *region, |
| 5152 | etree_type *tree, |
| 5153 | bfd_vma rbase) |
| 5154 | { |
| 5155 | if ((region->current < region->origin |
| 5156 | || (region->current - region->origin > region->length)) |
| 5157 | && ((region->current != region->origin + region->length) |
| 5158 | || rbase == 0)) |
| 5159 | { |
| 5160 | if (tree != NULL) |
| 5161 | { |
| 5162 | einfo (_("%X%P: address 0x%v of %pB section `%s'" |
| 5163 | " is not within region `%s'\n"), |
| 5164 | region->current, |
| 5165 | os->bfd_section->owner, |
| 5166 | os->bfd_section->name, |
| 5167 | region->name_list.name); |
| 5168 | } |
| 5169 | else if (!region->had_full_message) |
| 5170 | { |
| 5171 | region->had_full_message = TRUE; |
| 5172 | |
| 5173 | einfo (_("%X%P: %pB section `%s' will not fit in region `%s'\n"), |
| 5174 | os->bfd_section->owner, |
| 5175 | os->bfd_section->name, |
| 5176 | region->name_list.name); |
| 5177 | } |
| 5178 | } |
| 5179 | } |
| 5180 | |
| 5181 | static void |
| 5182 | ldlang_check_relro_region (lang_statement_union_type *s, |
| 5183 | seg_align_type *seg) |
| 5184 | { |
| 5185 | if (seg->relro == exp_seg_relro_start) |
| 5186 | { |
| 5187 | if (!seg->relro_start_stat) |
| 5188 | seg->relro_start_stat = s; |
| 5189 | else |
| 5190 | { |
| 5191 | ASSERT (seg->relro_start_stat == s); |
| 5192 | } |
| 5193 | } |
| 5194 | else if (seg->relro == exp_seg_relro_end) |
| 5195 | { |
| 5196 | if (!seg->relro_end_stat) |
| 5197 | seg->relro_end_stat = s; |
| 5198 | else |
| 5199 | { |
| 5200 | ASSERT (seg->relro_end_stat == s); |
| 5201 | } |
| 5202 | } |
| 5203 | } |
| 5204 | |
| 5205 | /* Set the sizes for all the output sections. */ |
| 5206 | |
| 5207 | static bfd_vma |
| 5208 | lang_size_sections_1 |
| 5209 | (lang_statement_union_type **prev, |
| 5210 | lang_output_section_statement_type *output_section_statement, |
| 5211 | fill_type *fill, |
| 5212 | bfd_vma dot, |
| 5213 | bfd_boolean *relax, |
| 5214 | bfd_boolean check_regions) |
| 5215 | { |
| 5216 | lang_statement_union_type *s; |
| 5217 | |
| 5218 | /* Size up the sections from their constituent parts. */ |
| 5219 | for (s = *prev; s != NULL; s = s->header.next) |
| 5220 | { |
| 5221 | switch (s->header.type) |
| 5222 | { |
| 5223 | case lang_output_section_statement_enum: |
| 5224 | { |
| 5225 | bfd_vma newdot, after, dotdelta; |
| 5226 | lang_output_section_statement_type *os; |
| 5227 | lang_memory_region_type *r; |
| 5228 | int section_alignment = 0; |
| 5229 | |
| 5230 | os = &s->output_section_statement; |
| 5231 | if (os->constraint == -1) |
| 5232 | break; |
| 5233 | |
| 5234 | /* FIXME: We shouldn't need to zero section vmas for ld -r |
| 5235 | here, in lang_insert_orphan, or in the default linker scripts. |
| 5236 | This is covering for coff backend linker bugs. See PR6945. */ |
| 5237 | if (os->addr_tree == NULL |
| 5238 | && bfd_link_relocatable (&link_info) |
| 5239 | && (bfd_get_flavour (link_info.output_bfd) |
| 5240 | == bfd_target_coff_flavour)) |
| 5241 | os->addr_tree = exp_intop (0); |
| 5242 | if (os->addr_tree != NULL) |
| 5243 | { |
| 5244 | os->processed_vma = FALSE; |
| 5245 | exp_fold_tree (os->addr_tree, bfd_abs_section_ptr, &dot); |
| 5246 | |
| 5247 | if (expld.result.valid_p) |
| 5248 | { |
| 5249 | dot = expld.result.value; |
| 5250 | if (expld.result.section != NULL) |
| 5251 | dot += expld.result.section->vma; |
| 5252 | } |
| 5253 | else if (expld.phase != lang_mark_phase_enum) |
| 5254 | einfo (_("%F%P:%pS: non constant or forward reference" |
| 5255 | " address expression for section %s\n"), |
| 5256 | os->addr_tree, os->name); |
| 5257 | } |
| 5258 | |
| 5259 | if (os->bfd_section == NULL) |
| 5260 | /* This section was removed or never actually created. */ |
| 5261 | break; |
| 5262 | |
| 5263 | /* If this is a COFF shared library section, use the size and |
| 5264 | address from the input section. FIXME: This is COFF |
| 5265 | specific; it would be cleaner if there were some other way |
| 5266 | to do this, but nothing simple comes to mind. */ |
| 5267 | if (((bfd_get_flavour (link_info.output_bfd) |
| 5268 | == bfd_target_ecoff_flavour) |
| 5269 | || (bfd_get_flavour (link_info.output_bfd) |
| 5270 | == bfd_target_coff_flavour)) |
| 5271 | && (os->bfd_section->flags & SEC_COFF_SHARED_LIBRARY) != 0) |
| 5272 | { |
| 5273 | asection *input; |
| 5274 | |
| 5275 | if (os->children.head == NULL |
| 5276 | || os->children.head->header.next != NULL |
| 5277 | || (os->children.head->header.type |
| 5278 | != lang_input_section_enum)) |
| 5279 | einfo (_("%X%P: internal error on COFF shared library" |
| 5280 | " section %s\n"), os->name); |
| 5281 | |
| 5282 | input = os->children.head->input_section.section; |
| 5283 | bfd_set_section_vma (os->bfd_section->owner, |
| 5284 | os->bfd_section, |
| 5285 | bfd_section_vma (input->owner, input)); |
| 5286 | if (!(os->bfd_section->flags & SEC_FIXED_SIZE)) |
| 5287 | os->bfd_section->size = input->size; |
| 5288 | break; |
| 5289 | } |
| 5290 | |
| 5291 | newdot = dot; |
| 5292 | dotdelta = 0; |
| 5293 | if (bfd_is_abs_section (os->bfd_section)) |
| 5294 | { |
| 5295 | /* No matter what happens, an abs section starts at zero. */ |
| 5296 | ASSERT (os->bfd_section->vma == 0); |
| 5297 | } |
| 5298 | else |
| 5299 | { |
| 5300 | if (os->addr_tree == NULL) |
| 5301 | { |
| 5302 | /* No address specified for this section, get one |
| 5303 | from the region specification. */ |
| 5304 | if (os->region == NULL |
| 5305 | || ((os->bfd_section->flags & (SEC_ALLOC | SEC_LOAD)) |
| 5306 | && os->region->name_list.name[0] == '*' |
| 5307 | && strcmp (os->region->name_list.name, |
| 5308 | DEFAULT_MEMORY_REGION) == 0)) |
| 5309 | { |
| 5310 | os->region = lang_memory_default (os->bfd_section); |
| 5311 | } |
| 5312 | |
| 5313 | /* If a loadable section is using the default memory |
| 5314 | region, and some non default memory regions were |
| 5315 | defined, issue an error message. */ |
| 5316 | if (!os->ignored |
| 5317 | && !IGNORE_SECTION (os->bfd_section) |
| 5318 | && !bfd_link_relocatable (&link_info) |
| 5319 | && check_regions |
| 5320 | && strcmp (os->region->name_list.name, |
| 5321 | DEFAULT_MEMORY_REGION) == 0 |
| 5322 | && lang_memory_region_list != NULL |
| 5323 | && (strcmp (lang_memory_region_list->name_list.name, |
| 5324 | DEFAULT_MEMORY_REGION) != 0 |
| 5325 | || lang_memory_region_list->next != NULL) |
| 5326 | && expld.phase != lang_mark_phase_enum) |
| 5327 | { |
| 5328 | /* By default this is an error rather than just a |
| 5329 | warning because if we allocate the section to the |
| 5330 | default memory region we can end up creating an |
| 5331 | excessively large binary, or even seg faulting when |
| 5332 | attempting to perform a negative seek. See |
| 5333 | sources.redhat.com/ml/binutils/2003-04/msg00423.html |
| 5334 | for an example of this. This behaviour can be |
| 5335 | overridden by the using the --no-check-sections |
| 5336 | switch. */ |
| 5337 | if (command_line.check_section_addresses) |
| 5338 | einfo (_("%F%P: error: no memory region specified" |
| 5339 | " for loadable section `%s'\n"), |
| 5340 | bfd_get_section_name (link_info.output_bfd, |
| 5341 | os->bfd_section)); |
| 5342 | else |
| 5343 | einfo (_("%P: warning: no memory region specified" |
| 5344 | " for loadable section `%s'\n"), |
| 5345 | bfd_get_section_name (link_info.output_bfd, |
| 5346 | os->bfd_section)); |
| 5347 | } |
| 5348 | |
| 5349 | newdot = os->region->current; |
| 5350 | section_alignment = os->bfd_section->alignment_power; |
| 5351 | } |
| 5352 | else |
| 5353 | section_alignment = exp_get_power (os->section_alignment, |
| 5354 | "section alignment"); |
| 5355 | |
| 5356 | /* Align to what the section needs. */ |
| 5357 | if (section_alignment > 0) |
| 5358 | { |
| 5359 | bfd_vma savedot = newdot; |
| 5360 | newdot = align_power (newdot, section_alignment); |
| 5361 | |
| 5362 | dotdelta = newdot - savedot; |
| 5363 | if (dotdelta != 0 |
| 5364 | && (config.warn_section_align |
| 5365 | || os->addr_tree != NULL) |
| 5366 | && expld.phase != lang_mark_phase_enum) |
| 5367 | einfo (ngettext ("%P: warning: changing start of " |
| 5368 | "section %s by %lu byte\n", |
| 5369 | "%P: warning: changing start of " |
| 5370 | "section %s by %lu bytes\n", |
| 5371 | (unsigned long) dotdelta), |
| 5372 | os->name, (unsigned long) dotdelta); |
| 5373 | } |
| 5374 | |
| 5375 | bfd_set_section_vma (0, os->bfd_section, newdot); |
| 5376 | |
| 5377 | os->bfd_section->output_offset = 0; |
| 5378 | } |
| 5379 | |
| 5380 | lang_size_sections_1 (&os->children.head, os, |
| 5381 | os->fill, newdot, relax, check_regions); |
| 5382 | |
| 5383 | os->processed_vma = TRUE; |
| 5384 | |
| 5385 | if (bfd_is_abs_section (os->bfd_section) || os->ignored) |
| 5386 | /* Except for some special linker created sections, |
| 5387 | no output section should change from zero size |
| 5388 | after strip_excluded_output_sections. A non-zero |
| 5389 | size on an ignored section indicates that some |
| 5390 | input section was not sized early enough. */ |
| 5391 | ASSERT (os->bfd_section->size == 0); |
| 5392 | else |
| 5393 | { |
| 5394 | dot = os->bfd_section->vma; |
| 5395 | |
| 5396 | /* Put the section within the requested block size, or |
| 5397 | align at the block boundary. */ |
| 5398 | after = ((dot |
| 5399 | + TO_ADDR (os->bfd_section->size) |
| 5400 | + os->block_value - 1) |
| 5401 | & - (bfd_vma) os->block_value); |
| 5402 | |
| 5403 | if (!(os->bfd_section->flags & SEC_FIXED_SIZE)) |
| 5404 | os->bfd_section->size = TO_SIZE (after |
| 5405 | - os->bfd_section->vma); |
| 5406 | } |
| 5407 | |
| 5408 | /* Set section lma. */ |
| 5409 | r = os->region; |
| 5410 | if (r == NULL) |
| 5411 | r = lang_memory_region_lookup (DEFAULT_MEMORY_REGION, FALSE); |
| 5412 | |
| 5413 | if (os->load_base) |
| 5414 | { |
| 5415 | bfd_vma lma = exp_get_abs_int (os->load_base, 0, "load base"); |
| 5416 | os->bfd_section->lma = lma; |
| 5417 | } |
| 5418 | else if (os->lma_region != NULL) |
| 5419 | { |
| 5420 | bfd_vma lma = os->lma_region->current; |
| 5421 | |
| 5422 | if (os->align_lma_with_input) |
| 5423 | lma += dotdelta; |
| 5424 | else |
| 5425 | { |
| 5426 | /* When LMA_REGION is the same as REGION, align the LMA |
| 5427 | as we did for the VMA, possibly including alignment |
| 5428 | from the bfd section. If a different region, then |
| 5429 | only align according to the value in the output |
| 5430 | statement. */ |
| 5431 | if (os->lma_region != os->region) |
| 5432 | section_alignment = exp_get_power (os->section_alignment, |
| 5433 | "section alignment"); |
| 5434 | if (section_alignment > 0) |
| 5435 | lma = align_power (lma, section_alignment); |
| 5436 | } |
| 5437 | os->bfd_section->lma = lma; |
| 5438 | } |
| 5439 | else if (r->last_os != NULL |
| 5440 | && (os->bfd_section->flags & SEC_ALLOC) != 0) |
| 5441 | { |
| 5442 | bfd_vma lma; |
| 5443 | asection *last; |
| 5444 | |
| 5445 | last = r->last_os->output_section_statement.bfd_section; |
| 5446 | |
| 5447 | /* A backwards move of dot should be accompanied by |
| 5448 | an explicit assignment to the section LMA (ie. |
| 5449 | os->load_base set) because backwards moves can |
| 5450 | create overlapping LMAs. */ |
| 5451 | if (dot < last->vma |
| 5452 | && os->bfd_section->size != 0 |
| 5453 | && dot + TO_ADDR (os->bfd_section->size) <= last->vma) |
| 5454 | { |
| 5455 | /* If dot moved backwards then leave lma equal to |
| 5456 | vma. This is the old default lma, which might |
| 5457 | just happen to work when the backwards move is |
| 5458 | sufficiently large. Nag if this changes anything, |
| 5459 | so people can fix their linker scripts. */ |
| 5460 | |
| 5461 | if (last->vma != last->lma) |
| 5462 | einfo (_("%P: warning: dot moved backwards " |
| 5463 | "before `%s'\n"), os->name); |
| 5464 | } |
| 5465 | else |
| 5466 | { |
| 5467 | /* If this is an overlay, set the current lma to that |
| 5468 | at the end of the previous section. */ |
| 5469 | if (os->sectype == overlay_section) |
| 5470 | lma = last->lma + TO_ADDR (last->size); |
| 5471 | |
| 5472 | /* Otherwise, keep the same lma to vma relationship |
| 5473 | as the previous section. */ |
| 5474 | else |
| 5475 | lma = dot + last->lma - last->vma; |
| 5476 | |
| 5477 | if (section_alignment > 0) |
| 5478 | lma = align_power (lma, section_alignment); |
| 5479 | os->bfd_section->lma = lma; |
| 5480 | } |
| 5481 | } |
| 5482 | os->processed_lma = TRUE; |
| 5483 | |
| 5484 | /* Keep track of normal sections using the default |
| 5485 | lma region. We use this to set the lma for |
| 5486 | following sections. Overlays or other linker |
| 5487 | script assignment to lma might mean that the |
| 5488 | default lma == vma is incorrect. |
| 5489 | To avoid warnings about dot moving backwards when using |
| 5490 | -Ttext, don't start tracking sections until we find one |
| 5491 | of non-zero size or with lma set differently to vma. |
| 5492 | Do this tracking before we short-cut the loop so that we |
| 5493 | track changes for the case where the section size is zero, |
| 5494 | but the lma is set differently to the vma. This is |
| 5495 | important, if an orphan section is placed after an |
| 5496 | otherwise empty output section that has an explicit lma |
| 5497 | set, we want that lma reflected in the orphans lma. */ |
| 5498 | if (((!IGNORE_SECTION (os->bfd_section) |
| 5499 | && (os->bfd_section->size != 0 |
| 5500 | || (r->last_os == NULL |
| 5501 | && os->bfd_section->vma != os->bfd_section->lma) |
| 5502 | || (r->last_os != NULL |
| 5503 | && dot >= (r->last_os->output_section_statement |
| 5504 | .bfd_section->vma)))) |
| 5505 | || os->sectype == first_overlay_section) |
| 5506 | && os->lma_region == NULL |
| 5507 | && !bfd_link_relocatable (&link_info)) |
| 5508 | r->last_os = s; |
| 5509 | |
| 5510 | if (bfd_is_abs_section (os->bfd_section) || os->ignored) |
| 5511 | break; |
| 5512 | |
| 5513 | /* .tbss sections effectively have zero size. */ |
| 5514 | if (!IS_TBSS (os->bfd_section) |
| 5515 | || bfd_link_relocatable (&link_info)) |
| 5516 | dotdelta = TO_ADDR (os->bfd_section->size); |
| 5517 | else |
| 5518 | dotdelta = 0; |
| 5519 | dot += dotdelta; |
| 5520 | |
| 5521 | if (os->update_dot_tree != 0) |
| 5522 | exp_fold_tree (os->update_dot_tree, bfd_abs_section_ptr, &dot); |
| 5523 | |
| 5524 | /* Update dot in the region ? |
| 5525 | We only do this if the section is going to be allocated, |
| 5526 | since unallocated sections do not contribute to the region's |
| 5527 | overall size in memory. */ |
| 5528 | if (os->region != NULL |
| 5529 | && (os->bfd_section->flags & (SEC_ALLOC | SEC_LOAD))) |
| 5530 | { |
| 5531 | os->region->current = dot; |
| 5532 | |
| 5533 | if (check_regions) |
| 5534 | /* Make sure the new address is within the region. */ |
| 5535 | os_region_check (os, os->region, os->addr_tree, |
| 5536 | os->bfd_section->vma); |
| 5537 | |
| 5538 | if (os->lma_region != NULL && os->lma_region != os->region |
| 5539 | && ((os->bfd_section->flags & SEC_LOAD) |
| 5540 | || os->align_lma_with_input)) |
| 5541 | { |
| 5542 | os->lma_region->current = os->bfd_section->lma + dotdelta; |
| 5543 | |
| 5544 | if (check_regions) |
| 5545 | os_region_check (os, os->lma_region, NULL, |
| 5546 | os->bfd_section->lma); |
| 5547 | } |
| 5548 | } |
| 5549 | } |
| 5550 | break; |
| 5551 | |
| 5552 | case lang_constructors_statement_enum: |
| 5553 | dot = lang_size_sections_1 (&constructor_list.head, |
| 5554 | output_section_statement, |
| 5555 | fill, dot, relax, check_regions); |
| 5556 | break; |
| 5557 | |
| 5558 | case lang_data_statement_enum: |
| 5559 | { |
| 5560 | unsigned int size = 0; |
| 5561 | |
| 5562 | s->data_statement.output_offset = |
| 5563 | dot - output_section_statement->bfd_section->vma; |
| 5564 | s->data_statement.output_section = |
| 5565 | output_section_statement->bfd_section; |
| 5566 | |
| 5567 | /* We might refer to provided symbols in the expression, and |
| 5568 | need to mark them as needed. */ |
| 5569 | exp_fold_tree (s->data_statement.exp, bfd_abs_section_ptr, &dot); |
| 5570 | |
| 5571 | switch (s->data_statement.type) |
| 5572 | { |
| 5573 | default: |
| 5574 | abort (); |
| 5575 | case QUAD: |
| 5576 | case SQUAD: |
| 5577 | size = QUAD_SIZE; |
| 5578 | break; |
| 5579 | case LONG: |
| 5580 | size = LONG_SIZE; |
| 5581 | break; |
| 5582 | case SHORT: |
| 5583 | size = SHORT_SIZE; |
| 5584 | break; |
| 5585 | case BYTE: |
| 5586 | size = BYTE_SIZE; |
| 5587 | break; |
| 5588 | } |
| 5589 | if (size < TO_SIZE ((unsigned) 1)) |
| 5590 | size = TO_SIZE ((unsigned) 1); |
| 5591 | dot += TO_ADDR (size); |
| 5592 | if (!(output_section_statement->bfd_section->flags |
| 5593 | & SEC_FIXED_SIZE)) |
| 5594 | output_section_statement->bfd_section->size |
| 5595 | = TO_SIZE (dot - output_section_statement->bfd_section->vma); |
| 5596 | |
| 5597 | } |
| 5598 | break; |
| 5599 | |
| 5600 | case lang_reloc_statement_enum: |
| 5601 | { |
| 5602 | int size; |
| 5603 | |
| 5604 | s->reloc_statement.output_offset = |
| 5605 | dot - output_section_statement->bfd_section->vma; |
| 5606 | s->reloc_statement.output_section = |
| 5607 | output_section_statement->bfd_section; |
| 5608 | size = bfd_get_reloc_size (s->reloc_statement.howto); |
| 5609 | dot += TO_ADDR (size); |
| 5610 | if (!(output_section_statement->bfd_section->flags |
| 5611 | & SEC_FIXED_SIZE)) |
| 5612 | output_section_statement->bfd_section->size |
| 5613 | = TO_SIZE (dot - output_section_statement->bfd_section->vma); |
| 5614 | } |
| 5615 | break; |
| 5616 | |
| 5617 | case lang_wild_statement_enum: |
| 5618 | dot = lang_size_sections_1 (&s->wild_statement.children.head, |
| 5619 | output_section_statement, |
| 5620 | fill, dot, relax, check_regions); |
| 5621 | break; |
| 5622 | |
| 5623 | case lang_object_symbols_statement_enum: |
| 5624 | link_info.create_object_symbols_section |
| 5625 | = output_section_statement->bfd_section; |
| 5626 | output_section_statement->bfd_section->flags |= SEC_KEEP; |
| 5627 | break; |
| 5628 | |
| 5629 | case lang_output_statement_enum: |
| 5630 | case lang_target_statement_enum: |
| 5631 | break; |
| 5632 | |
| 5633 | case lang_input_section_enum: |
| 5634 | { |
| 5635 | asection *i; |
| 5636 | |
| 5637 | i = s->input_section.section; |
| 5638 | if (relax) |
| 5639 | { |
| 5640 | bfd_boolean again; |
| 5641 | |
| 5642 | if (!bfd_relax_section (i->owner, i, &link_info, &again)) |
| 5643 | einfo (_("%F%P: can't relax section: %E\n")); |
| 5644 | if (again) |
| 5645 | *relax = TRUE; |
| 5646 | } |
| 5647 | dot = size_input_section (prev, output_section_statement, |
| 5648 | fill, dot); |
| 5649 | } |
| 5650 | break; |
| 5651 | |
| 5652 | case lang_input_statement_enum: |
| 5653 | break; |
| 5654 | |
| 5655 | case lang_fill_statement_enum: |
| 5656 | s->fill_statement.output_section = |
| 5657 | output_section_statement->bfd_section; |
| 5658 | |
| 5659 | fill = s->fill_statement.fill; |
| 5660 | break; |
| 5661 | |
| 5662 | case lang_assignment_statement_enum: |
| 5663 | { |
| 5664 | bfd_vma newdot = dot; |
| 5665 | etree_type *tree = s->assignment_statement.exp; |
| 5666 | |
| 5667 | expld.dataseg.relro = exp_seg_relro_none; |
| 5668 | |
| 5669 | exp_fold_tree (tree, |
| 5670 | output_section_statement->bfd_section, |
| 5671 | &newdot); |
| 5672 | |
| 5673 | ldlang_check_relro_region (s, &expld.dataseg); |
| 5674 | |
| 5675 | expld.dataseg.relro = exp_seg_relro_none; |
| 5676 | |
| 5677 | /* This symbol may be relative to this section. */ |
| 5678 | if ((tree->type.node_class == etree_provided |
| 5679 | || tree->type.node_class == etree_assign) |
| 5680 | && (tree->assign.dst [0] != '.' |
| 5681 | || tree->assign.dst [1] != '\0')) |
| 5682 | output_section_statement->update_dot = 1; |
| 5683 | |
| 5684 | if (!output_section_statement->ignored) |
| 5685 | { |
| 5686 | if (output_section_statement == abs_output_section) |
| 5687 | { |
| 5688 | /* If we don't have an output section, then just adjust |
| 5689 | the default memory address. */ |
| 5690 | lang_memory_region_lookup (DEFAULT_MEMORY_REGION, |
| 5691 | FALSE)->current = newdot; |
| 5692 | } |
| 5693 | else if (newdot != dot) |
| 5694 | { |
| 5695 | /* Insert a pad after this statement. We can't |
| 5696 | put the pad before when relaxing, in case the |
| 5697 | assignment references dot. */ |
| 5698 | insert_pad (&s->header.next, fill, TO_SIZE (newdot - dot), |
| 5699 | output_section_statement->bfd_section, dot); |
| 5700 | |
| 5701 | /* Don't neuter the pad below when relaxing. */ |
| 5702 | s = s->header.next; |
| 5703 | |
| 5704 | /* If dot is advanced, this implies that the section |
| 5705 | should have space allocated to it, unless the |
| 5706 | user has explicitly stated that the section |
| 5707 | should not be allocated. */ |
| 5708 | if (output_section_statement->sectype != noalloc_section |
| 5709 | && (output_section_statement->sectype != noload_section |
| 5710 | || (bfd_get_flavour (link_info.output_bfd) |
| 5711 | == bfd_target_elf_flavour))) |
| 5712 | output_section_statement->bfd_section->flags |= SEC_ALLOC; |
| 5713 | } |
| 5714 | dot = newdot; |
| 5715 | } |
| 5716 | } |
| 5717 | break; |
| 5718 | |
| 5719 | case lang_padding_statement_enum: |
| 5720 | /* If this is the first time lang_size_sections is called, |
| 5721 | we won't have any padding statements. If this is the |
| 5722 | second or later passes when relaxing, we should allow |
| 5723 | padding to shrink. If padding is needed on this pass, it |
| 5724 | will be added back in. */ |
| 5725 | s->padding_statement.size = 0; |
| 5726 | |
| 5727 | /* Make sure output_offset is valid. If relaxation shrinks |
| 5728 | the section and this pad isn't needed, it's possible to |
| 5729 | have output_offset larger than the final size of the |
| 5730 | section. bfd_set_section_contents will complain even for |
| 5731 | a pad size of zero. */ |
| 5732 | s->padding_statement.output_offset |
| 5733 | = dot - output_section_statement->bfd_section->vma; |
| 5734 | break; |
| 5735 | |
| 5736 | case lang_group_statement_enum: |
| 5737 | dot = lang_size_sections_1 (&s->group_statement.children.head, |
| 5738 | output_section_statement, |
| 5739 | fill, dot, relax, check_regions); |
| 5740 | break; |
| 5741 | |
| 5742 | case lang_insert_statement_enum: |
| 5743 | break; |
| 5744 | |
| 5745 | /* We can only get here when relaxing is turned on. */ |
| 5746 | case lang_address_statement_enum: |
| 5747 | break; |
| 5748 | |
| 5749 | default: |
| 5750 | FAIL (); |
| 5751 | break; |
| 5752 | } |
| 5753 | prev = &s->header.next; |
| 5754 | } |
| 5755 | return dot; |
| 5756 | } |
| 5757 | |
| 5758 | /* Callback routine that is used in _bfd_elf_map_sections_to_segments. |
| 5759 | The BFD library has set NEW_SEGMENT to TRUE iff it thinks that |
| 5760 | CURRENT_SECTION and PREVIOUS_SECTION ought to be placed into different |
| 5761 | segments. We are allowed an opportunity to override this decision. */ |
| 5762 | |
| 5763 | bfd_boolean |
| 5764 | ldlang_override_segment_assignment (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
| 5765 | bfd *abfd ATTRIBUTE_UNUSED, |
| 5766 | asection *current_section, |
| 5767 | asection *previous_section, |
| 5768 | bfd_boolean new_segment) |
| 5769 | { |
| 5770 | lang_output_section_statement_type *cur; |
| 5771 | lang_output_section_statement_type *prev; |
| 5772 | |
| 5773 | /* The checks below are only necessary when the BFD library has decided |
| 5774 | that the two sections ought to be placed into the same segment. */ |
| 5775 | if (new_segment) |
| 5776 | return TRUE; |
| 5777 | |
| 5778 | /* Paranoia checks. */ |
| 5779 | if (current_section == NULL || previous_section == NULL) |
| 5780 | return new_segment; |
| 5781 | |
| 5782 | /* If this flag is set, the target never wants code and non-code |
| 5783 | sections comingled in the same segment. */ |
| 5784 | if (config.separate_code |
| 5785 | && ((current_section->flags ^ previous_section->flags) & SEC_CODE)) |
| 5786 | return TRUE; |
| 5787 | |
| 5788 | /* Find the memory regions associated with the two sections. |
| 5789 | We call lang_output_section_find() here rather than scanning the list |
| 5790 | of output sections looking for a matching section pointer because if |
| 5791 | we have a large number of sections then a hash lookup is faster. */ |
| 5792 | cur = lang_output_section_find (current_section->name); |
| 5793 | prev = lang_output_section_find (previous_section->name); |
| 5794 | |
| 5795 | /* More paranoia. */ |
| 5796 | if (cur == NULL || prev == NULL) |
| 5797 | return new_segment; |
| 5798 | |
| 5799 | /* If the regions are different then force the sections to live in |
| 5800 | different segments. See the email thread starting at the following |
| 5801 | URL for the reasons why this is necessary: |
| 5802 | http://sourceware.org/ml/binutils/2007-02/msg00216.html */ |
| 5803 | return cur->region != prev->region; |
| 5804 | } |
| 5805 | |
| 5806 | void |
| 5807 | one_lang_size_sections_pass (bfd_boolean *relax, bfd_boolean check_regions) |
| 5808 | { |
| 5809 | lang_statement_iteration++; |
| 5810 | lang_size_sections_1 (&statement_list.head, abs_output_section, |
| 5811 | 0, 0, relax, check_regions); |
| 5812 | } |
| 5813 | |
| 5814 | static bfd_boolean |
| 5815 | lang_size_segment (seg_align_type *seg) |
| 5816 | { |
| 5817 | /* If XXX_SEGMENT_ALIGN XXX_SEGMENT_END pair was seen, check whether |
| 5818 | a page could be saved in the data segment. */ |
| 5819 | bfd_vma first, last; |
| 5820 | |
| 5821 | first = -seg->base & (seg->pagesize - 1); |
| 5822 | last = seg->end & (seg->pagesize - 1); |
| 5823 | if (first && last |
| 5824 | && ((seg->base & ~(seg->pagesize - 1)) |
| 5825 | != (seg->end & ~(seg->pagesize - 1))) |
| 5826 | && first + last <= seg->pagesize) |
| 5827 | { |
| 5828 | seg->phase = exp_seg_adjust; |
| 5829 | return TRUE; |
| 5830 | } |
| 5831 | |
| 5832 | seg->phase = exp_seg_done; |
| 5833 | return FALSE; |
| 5834 | } |
| 5835 | |
| 5836 | static bfd_vma |
| 5837 | lang_size_relro_segment_1 (seg_align_type *seg) |
| 5838 | { |
| 5839 | bfd_vma relro_end, desired_end; |
| 5840 | asection *sec; |
| 5841 | |
| 5842 | /* Compute the expected PT_GNU_RELRO/PT_LOAD segment end. */ |
| 5843 | relro_end = ((seg->relro_end + seg->pagesize - 1) |
| 5844 | & ~(seg->pagesize - 1)); |
| 5845 | |
| 5846 | /* Adjust by the offset arg of XXX_SEGMENT_RELRO_END. */ |
| 5847 | desired_end = relro_end - seg->relro_offset; |
| 5848 | |
| 5849 | /* For sections in the relro segment.. */ |
| 5850 | for (sec = link_info.output_bfd->section_last; sec; sec = sec->prev) |
| 5851 | if ((sec->flags & SEC_ALLOC) != 0 |
| 5852 | && sec->vma >= seg->base |
| 5853 | && sec->vma < seg->relro_end - seg->relro_offset) |
| 5854 | { |
| 5855 | /* Where do we want to put this section so that it ends as |
| 5856 | desired? */ |
| 5857 | bfd_vma start, end, bump; |
| 5858 | |
| 5859 | end = start = sec->vma; |
| 5860 | if (!IS_TBSS (sec)) |
| 5861 | end += TO_ADDR (sec->size); |
| 5862 | bump = desired_end - end; |
| 5863 | /* We'd like to increase START by BUMP, but we must heed |
| 5864 | alignment so the increase might be less than optimum. */ |
| 5865 | start += bump; |
| 5866 | start &= ~(((bfd_vma) 1 << sec->alignment_power) - 1); |
| 5867 | /* This is now the desired end for the previous section. */ |
| 5868 | desired_end = start; |
| 5869 | } |
| 5870 | |
| 5871 | seg->phase = exp_seg_relro_adjust; |
| 5872 | ASSERT (desired_end >= seg->base); |
| 5873 | seg->base = desired_end; |
| 5874 | return relro_end; |
| 5875 | } |
| 5876 | |
| 5877 | static bfd_boolean |
| 5878 | lang_size_relro_segment (bfd_boolean *relax, bfd_boolean check_regions) |
| 5879 | { |
| 5880 | bfd_boolean do_reset = FALSE; |
| 5881 | bfd_boolean do_data_relro; |
| 5882 | bfd_vma data_initial_base, data_relro_end; |
| 5883 | |
| 5884 | if (link_info.relro && expld.dataseg.relro_end) |
| 5885 | { |
| 5886 | do_data_relro = TRUE; |
| 5887 | data_initial_base = expld.dataseg.base; |
| 5888 | data_relro_end = lang_size_relro_segment_1 (&expld.dataseg); |
| 5889 | } |
| 5890 | else |
| 5891 | { |
| 5892 | do_data_relro = FALSE; |
| 5893 | data_initial_base = data_relro_end = 0; |
| 5894 | } |
| 5895 | |
| 5896 | if (do_data_relro) |
| 5897 | { |
| 5898 | lang_reset_memory_regions (); |
| 5899 | one_lang_size_sections_pass (relax, check_regions); |
| 5900 | |
| 5901 | /* Assignments to dot, or to output section address in a user |
| 5902 | script have increased padding over the original. Revert. */ |
| 5903 | if (do_data_relro && expld.dataseg.relro_end > data_relro_end) |
| 5904 | { |
| 5905 | expld.dataseg.base = data_initial_base;; |
| 5906 | do_reset = TRUE; |
| 5907 | } |
| 5908 | } |
| 5909 | |
| 5910 | if (!do_data_relro && lang_size_segment (&expld.dataseg)) |
| 5911 | do_reset = TRUE; |
| 5912 | |
| 5913 | return do_reset; |
| 5914 | } |
| 5915 | |
| 5916 | void |
| 5917 | lang_size_sections (bfd_boolean *relax, bfd_boolean check_regions) |
| 5918 | { |
| 5919 | expld.phase = lang_allocating_phase_enum; |
| 5920 | expld.dataseg.phase = exp_seg_none; |
| 5921 | |
| 5922 | one_lang_size_sections_pass (relax, check_regions); |
| 5923 | |
| 5924 | if (expld.dataseg.phase != exp_seg_end_seen) |
| 5925 | expld.dataseg.phase = exp_seg_done; |
| 5926 | |
| 5927 | if (expld.dataseg.phase == exp_seg_end_seen) |
| 5928 | { |
| 5929 | bfd_boolean do_reset |
| 5930 | = lang_size_relro_segment (relax, check_regions); |
| 5931 | |
| 5932 | if (do_reset) |
| 5933 | { |
| 5934 | lang_reset_memory_regions (); |
| 5935 | one_lang_size_sections_pass (relax, check_regions); |
| 5936 | } |
| 5937 | |
| 5938 | if (link_info.relro && expld.dataseg.relro_end) |
| 5939 | { |
| 5940 | link_info.relro_start = expld.dataseg.base; |
| 5941 | link_info.relro_end = expld.dataseg.relro_end; |
| 5942 | } |
| 5943 | } |
| 5944 | } |
| 5945 | |
| 5946 | static lang_output_section_statement_type *current_section; |
| 5947 | static lang_assignment_statement_type *current_assign; |
| 5948 | static bfd_boolean prefer_next_section; |
| 5949 | |
| 5950 | /* Worker function for lang_do_assignments. Recursiveness goes here. */ |
| 5951 | |
| 5952 | static bfd_vma |
| 5953 | lang_do_assignments_1 (lang_statement_union_type *s, |
| 5954 | lang_output_section_statement_type *current_os, |
| 5955 | fill_type *fill, |
| 5956 | bfd_vma dot, |
| 5957 | bfd_boolean *found_end) |
| 5958 | { |
| 5959 | for (; s != NULL; s = s->header.next) |
| 5960 | { |
| 5961 | switch (s->header.type) |
| 5962 | { |
| 5963 | case lang_constructors_statement_enum: |
| 5964 | dot = lang_do_assignments_1 (constructor_list.head, |
| 5965 | current_os, fill, dot, found_end); |
| 5966 | break; |
| 5967 | |
| 5968 | case lang_output_section_statement_enum: |
| 5969 | { |
| 5970 | lang_output_section_statement_type *os; |
| 5971 | bfd_vma newdot; |
| 5972 | |
| 5973 | os = &(s->output_section_statement); |
| 5974 | os->after_end = *found_end; |
| 5975 | if (os->bfd_section != NULL && !os->ignored) |
| 5976 | { |
| 5977 | if ((os->bfd_section->flags & SEC_ALLOC) != 0) |
| 5978 | { |
| 5979 | current_section = os; |
| 5980 | prefer_next_section = FALSE; |
| 5981 | } |
| 5982 | dot = os->bfd_section->vma; |
| 5983 | } |
| 5984 | newdot = lang_do_assignments_1 (os->children.head, |
| 5985 | os, os->fill, dot, found_end); |
| 5986 | if (!os->ignored) |
| 5987 | { |
| 5988 | if (os->bfd_section != NULL) |
| 5989 | { |
| 5990 | /* .tbss sections effectively have zero size. */ |
| 5991 | if (!IS_TBSS (os->bfd_section) |
| 5992 | || bfd_link_relocatable (&link_info)) |
| 5993 | dot += TO_ADDR (os->bfd_section->size); |
| 5994 | |
| 5995 | if (os->update_dot_tree != NULL) |
| 5996 | exp_fold_tree (os->update_dot_tree, |
| 5997 | bfd_abs_section_ptr, &dot); |
| 5998 | } |
| 5999 | else |
| 6000 | dot = newdot; |
| 6001 | } |
| 6002 | } |
| 6003 | break; |
| 6004 | |
| 6005 | case lang_wild_statement_enum: |
| 6006 | |
| 6007 | dot = lang_do_assignments_1 (s->wild_statement.children.head, |
| 6008 | current_os, fill, dot, found_end); |
| 6009 | break; |
| 6010 | |
| 6011 | case lang_object_symbols_statement_enum: |
| 6012 | case lang_output_statement_enum: |
| 6013 | case lang_target_statement_enum: |
| 6014 | break; |
| 6015 | |
| 6016 | case lang_data_statement_enum: |
| 6017 | exp_fold_tree (s->data_statement.exp, bfd_abs_section_ptr, &dot); |
| 6018 | if (expld.result.valid_p) |
| 6019 | { |
| 6020 | s->data_statement.value = expld.result.value; |
| 6021 | if (expld.result.section != NULL) |
| 6022 | s->data_statement.value += expld.result.section->vma; |
| 6023 | } |
| 6024 | else if (expld.phase == lang_final_phase_enum) |
| 6025 | einfo (_("%F%P: invalid data statement\n")); |
| 6026 | { |
| 6027 | unsigned int size; |
| 6028 | switch (s->data_statement.type) |
| 6029 | { |
| 6030 | default: |
| 6031 | abort (); |
| 6032 | case QUAD: |
| 6033 | case SQUAD: |
| 6034 | size = QUAD_SIZE; |
| 6035 | break; |
| 6036 | case LONG: |
| 6037 | size = LONG_SIZE; |
| 6038 | break; |
| 6039 | case SHORT: |
| 6040 | size = SHORT_SIZE; |
| 6041 | break; |
| 6042 | case BYTE: |
| 6043 | size = BYTE_SIZE; |
| 6044 | break; |
| 6045 | } |
| 6046 | if (size < TO_SIZE ((unsigned) 1)) |
| 6047 | size = TO_SIZE ((unsigned) 1); |
| 6048 | dot += TO_ADDR (size); |
| 6049 | } |
| 6050 | break; |
| 6051 | |
| 6052 | case lang_reloc_statement_enum: |
| 6053 | exp_fold_tree (s->reloc_statement.addend_exp, |
| 6054 | bfd_abs_section_ptr, &dot); |
| 6055 | if (expld.result.valid_p) |
| 6056 | s->reloc_statement.addend_value = expld.result.value; |
| 6057 | else if (expld.phase == lang_final_phase_enum) |
| 6058 | einfo (_("%F%P: invalid reloc statement\n")); |
| 6059 | dot += TO_ADDR (bfd_get_reloc_size (s->reloc_statement.howto)); |
| 6060 | break; |
| 6061 | |
| 6062 | case lang_input_section_enum: |
| 6063 | { |
| 6064 | asection *in = s->input_section.section; |
| 6065 | |
| 6066 | if ((in->flags & SEC_EXCLUDE) == 0) |
| 6067 | dot += TO_ADDR (in->size); |
| 6068 | } |
| 6069 | break; |
| 6070 | |
| 6071 | case lang_input_statement_enum: |
| 6072 | break; |
| 6073 | |
| 6074 | case lang_fill_statement_enum: |
| 6075 | fill = s->fill_statement.fill; |
| 6076 | break; |
| 6077 | |
| 6078 | case lang_assignment_statement_enum: |
| 6079 | current_assign = &s->assignment_statement; |
| 6080 | if (current_assign->exp->type.node_class != etree_assert) |
| 6081 | { |
| 6082 | const char *p = current_assign->exp->assign.dst; |
| 6083 | |
| 6084 | if (current_os == abs_output_section && p[0] == '.' && p[1] == 0) |
| 6085 | prefer_next_section = TRUE; |
| 6086 | |
| 6087 | while (*p == '_') |
| 6088 | ++p; |
| 6089 | if (strcmp (p, "end") == 0) |
| 6090 | *found_end = TRUE; |
| 6091 | } |
| 6092 | exp_fold_tree (s->assignment_statement.exp, |
| 6093 | (current_os->bfd_section != NULL |
| 6094 | ? current_os->bfd_section : bfd_und_section_ptr), |
| 6095 | &dot); |
| 6096 | break; |
| 6097 | |
| 6098 | case lang_padding_statement_enum: |
| 6099 | dot += TO_ADDR (s->padding_statement.size); |
| 6100 | break; |
| 6101 | |
| 6102 | case lang_group_statement_enum: |
| 6103 | dot = lang_do_assignments_1 (s->group_statement.children.head, |
| 6104 | current_os, fill, dot, found_end); |
| 6105 | break; |
| 6106 | |
| 6107 | case lang_insert_statement_enum: |
| 6108 | break; |
| 6109 | |
| 6110 | case lang_address_statement_enum: |
| 6111 | break; |
| 6112 | |
| 6113 | default: |
| 6114 | FAIL (); |
| 6115 | break; |
| 6116 | } |
| 6117 | } |
| 6118 | return dot; |
| 6119 | } |
| 6120 | |
| 6121 | void |
| 6122 | lang_do_assignments (lang_phase_type phase) |
| 6123 | { |
| 6124 | bfd_boolean found_end = FALSE; |
| 6125 | |
| 6126 | current_section = NULL; |
| 6127 | prefer_next_section = FALSE; |
| 6128 | expld.phase = phase; |
| 6129 | lang_statement_iteration++; |
| 6130 | lang_do_assignments_1 (statement_list.head, |
| 6131 | abs_output_section, NULL, 0, &found_end); |
| 6132 | } |
| 6133 | |
| 6134 | /* For an assignment statement outside of an output section statement, |
| 6135 | choose the best of neighbouring output sections to use for values |
| 6136 | of "dot". */ |
| 6137 | |
| 6138 | asection * |
| 6139 | section_for_dot (void) |
| 6140 | { |
| 6141 | asection *s; |
| 6142 | |
| 6143 | /* Assignments belong to the previous output section, unless there |
| 6144 | has been an assignment to "dot", in which case following |
| 6145 | assignments belong to the next output section. (The assumption |
| 6146 | is that an assignment to "dot" is setting up the address for the |
| 6147 | next output section.) Except that past the assignment to "_end" |
| 6148 | we always associate with the previous section. This exception is |
| 6149 | for targets like SH that define an alloc .stack or other |
| 6150 | weirdness after non-alloc sections. */ |
| 6151 | if (current_section == NULL || prefer_next_section) |
| 6152 | { |
| 6153 | lang_statement_union_type *stmt; |
| 6154 | lang_output_section_statement_type *os; |
| 6155 | |
| 6156 | for (stmt = (lang_statement_union_type *) current_assign; |
| 6157 | stmt != NULL; |
| 6158 | stmt = stmt->header.next) |
| 6159 | if (stmt->header.type == lang_output_section_statement_enum) |
| 6160 | break; |
| 6161 | |
| 6162 | os = &stmt->output_section_statement; |
| 6163 | while (os != NULL |
| 6164 | && !os->after_end |
| 6165 | && (os->bfd_section == NULL |
| 6166 | || (os->bfd_section->flags & SEC_EXCLUDE) != 0 |
| 6167 | || bfd_section_removed_from_list (link_info.output_bfd, |
| 6168 | os->bfd_section))) |
| 6169 | os = os->next; |
| 6170 | |
| 6171 | if (current_section == NULL || os == NULL || !os->after_end) |
| 6172 | { |
| 6173 | if (os != NULL) |
| 6174 | s = os->bfd_section; |
| 6175 | else |
| 6176 | s = link_info.output_bfd->section_last; |
| 6177 | while (s != NULL |
| 6178 | && ((s->flags & SEC_ALLOC) == 0 |
| 6179 | || (s->flags & SEC_THREAD_LOCAL) != 0)) |
| 6180 | s = s->prev; |
| 6181 | if (s != NULL) |
| 6182 | return s; |
| 6183 | |
| 6184 | return bfd_abs_section_ptr; |
| 6185 | } |
| 6186 | } |
| 6187 | |
| 6188 | s = current_section->bfd_section; |
| 6189 | |
| 6190 | /* The section may have been stripped. */ |
| 6191 | while (s != NULL |
| 6192 | && ((s->flags & SEC_EXCLUDE) != 0 |
| 6193 | || (s->flags & SEC_ALLOC) == 0 |
| 6194 | || (s->flags & SEC_THREAD_LOCAL) != 0 |
| 6195 | || bfd_section_removed_from_list (link_info.output_bfd, s))) |
| 6196 | s = s->prev; |
| 6197 | if (s == NULL) |
| 6198 | s = link_info.output_bfd->sections; |
| 6199 | while (s != NULL |
| 6200 | && ((s->flags & SEC_ALLOC) == 0 |
| 6201 | || (s->flags & SEC_THREAD_LOCAL) != 0)) |
| 6202 | s = s->next; |
| 6203 | if (s != NULL) |
| 6204 | return s; |
| 6205 | |
| 6206 | return bfd_abs_section_ptr; |
| 6207 | } |
| 6208 | |
| 6209 | /* Array of __start/__stop/.startof./.sizeof/ symbols. */ |
| 6210 | |
| 6211 | static struct bfd_link_hash_entry **start_stop_syms; |
| 6212 | static size_t start_stop_count = 0; |
| 6213 | static size_t start_stop_alloc = 0; |
| 6214 | |
| 6215 | /* Give start/stop SYMBOL for SEC a preliminary definition, and add it |
| 6216 | to start_stop_syms. */ |
| 6217 | |
| 6218 | static void |
| 6219 | lang_define_start_stop (const char *symbol, asection *sec) |
| 6220 | { |
| 6221 | struct bfd_link_hash_entry *h; |
| 6222 | |
| 6223 | h = bfd_define_start_stop (link_info.output_bfd, &link_info, symbol, sec); |
| 6224 | if (h != NULL) |
| 6225 | { |
| 6226 | if (start_stop_count == start_stop_alloc) |
| 6227 | { |
| 6228 | start_stop_alloc = 2 * start_stop_alloc + 10; |
| 6229 | start_stop_syms |
| 6230 | = xrealloc (start_stop_syms, |
| 6231 | start_stop_alloc * sizeof (*start_stop_syms)); |
| 6232 | } |
| 6233 | start_stop_syms[start_stop_count++] = h; |
| 6234 | } |
| 6235 | } |
| 6236 | |
| 6237 | /* Check for input sections whose names match references to |
| 6238 | __start_SECNAME or __stop_SECNAME symbols. Give the symbols |
| 6239 | preliminary definitions. */ |
| 6240 | |
| 6241 | static void |
| 6242 | lang_init_start_stop (void) |
| 6243 | { |
| 6244 | bfd *abfd; |
| 6245 | asection *s; |
| 6246 | char leading_char = bfd_get_symbol_leading_char (link_info.output_bfd); |
| 6247 | |
| 6248 | for (abfd = link_info.input_bfds; abfd != NULL; abfd = abfd->link.next) |
| 6249 | for (s = abfd->sections; s != NULL; s = s->next) |
| 6250 | { |
| 6251 | const char *ps; |
| 6252 | const char *secname = s->name; |
| 6253 | |
| 6254 | for (ps = secname; *ps != '\0'; ps++) |
| 6255 | if (!ISALNUM ((unsigned char) *ps) && *ps != '_') |
| 6256 | break; |
| 6257 | if (*ps == '\0') |
| 6258 | { |
| 6259 | char *symbol = (char *) xmalloc (10 + strlen (secname)); |
| 6260 | |
| 6261 | symbol[0] = leading_char; |
| 6262 | sprintf (symbol + (leading_char != 0), "__start_%s", secname); |
| 6263 | lang_define_start_stop (symbol, s); |
| 6264 | |
| 6265 | symbol[1] = leading_char; |
| 6266 | memcpy (symbol + 1 + (leading_char != 0), "__stop", 6); |
| 6267 | lang_define_start_stop (symbol + 1, s); |
| 6268 | |
| 6269 | free (symbol); |
| 6270 | } |
| 6271 | } |
| 6272 | } |
| 6273 | |
| 6274 | /* Iterate over start_stop_syms. */ |
| 6275 | |
| 6276 | static void |
| 6277 | foreach_start_stop (void (*func) (struct bfd_link_hash_entry *)) |
| 6278 | { |
| 6279 | size_t i; |
| 6280 | |
| 6281 | for (i = 0; i < start_stop_count; ++i) |
| 6282 | func (start_stop_syms[i]); |
| 6283 | } |
| 6284 | |
| 6285 | /* __start and __stop symbols are only supposed to be defined by the |
| 6286 | linker for orphan sections, but we now extend that to sections that |
| 6287 | map to an output section of the same name. The symbols were |
| 6288 | defined early for --gc-sections, before we mapped input to output |
| 6289 | sections, so undo those that don't satisfy this rule. */ |
| 6290 | |
| 6291 | static void |
| 6292 | undef_start_stop (struct bfd_link_hash_entry *h) |
| 6293 | { |
| 6294 | if (h->ldscript_def) |
| 6295 | return; |
| 6296 | |
| 6297 | if (h->u.def.section->output_section == NULL |
| 6298 | || h->u.def.section->output_section->owner != link_info.output_bfd |
| 6299 | || strcmp (h->u.def.section->name, |
| 6300 | h->u.def.section->output_section->name) != 0) |
| 6301 | { |
| 6302 | asection *sec = bfd_get_section_by_name (link_info.output_bfd, |
| 6303 | h->u.def.section->name); |
| 6304 | if (sec != NULL) |
| 6305 | { |
| 6306 | /* When there are more than one input sections with the same |
| 6307 | section name, SECNAME, linker picks the first one to define |
| 6308 | __start_SECNAME and __stop_SECNAME symbols. When the first |
| 6309 | input section is removed by comdat group, we need to check |
| 6310 | if there is still an output section with section name |
| 6311 | SECNAME. */ |
| 6312 | asection *i; |
| 6313 | for (i = sec->map_head.s; i != NULL; i = i->map_head.s) |
| 6314 | if (strcmp (h->u.def.section->name, i->name) == 0) |
| 6315 | { |
| 6316 | h->u.def.section = i; |
| 6317 | return; |
| 6318 | } |
| 6319 | } |
| 6320 | h->type = bfd_link_hash_undefined; |
| 6321 | h->u.undef.abfd = NULL; |
| 6322 | } |
| 6323 | } |
| 6324 | |
| 6325 | static void |
| 6326 | lang_undef_start_stop (void) |
| 6327 | { |
| 6328 | foreach_start_stop (undef_start_stop); |
| 6329 | } |
| 6330 | |
| 6331 | /* Check for output sections whose names match references to |
| 6332 | .startof.SECNAME or .sizeof.SECNAME symbols. Give the symbols |
| 6333 | preliminary definitions. */ |
| 6334 | |
| 6335 | static void |
| 6336 | lang_init_startof_sizeof (void) |
| 6337 | { |
| 6338 | asection *s; |
| 6339 | |
| 6340 | for (s = link_info.output_bfd->sections; s != NULL; s = s->next) |
| 6341 | { |
| 6342 | const char *secname = s->name; |
| 6343 | char *symbol = (char *) xmalloc (10 + strlen (secname)); |
| 6344 | |
| 6345 | sprintf (symbol, ".startof.%s", secname); |
| 6346 | lang_define_start_stop (symbol, s); |
| 6347 | |
| 6348 | memcpy (symbol + 1, ".size", 5); |
| 6349 | lang_define_start_stop (symbol + 1, s); |
| 6350 | free (symbol); |
| 6351 | } |
| 6352 | } |
| 6353 | |
| 6354 | /* Set .startof., .sizeof., __start and __stop symbols final values. */ |
| 6355 | |
| 6356 | static void |
| 6357 | set_start_stop (struct bfd_link_hash_entry *h) |
| 6358 | { |
| 6359 | if (h->ldscript_def |
| 6360 | || h->type != bfd_link_hash_defined) |
| 6361 | return; |
| 6362 | |
| 6363 | if (h->root.string[0] == '.') |
| 6364 | { |
| 6365 | /* .startof. or .sizeof. symbol. |
| 6366 | .startof. already has final value. */ |
| 6367 | if (h->root.string[2] == 'i') |
| 6368 | { |
| 6369 | /* .sizeof. */ |
| 6370 | h->u.def.value = TO_ADDR (h->u.def.section->size); |
| 6371 | h->u.def.section = bfd_abs_section_ptr; |
| 6372 | } |
| 6373 | } |
| 6374 | else |
| 6375 | { |
| 6376 | /* __start or __stop symbol. */ |
| 6377 | int has_lead = bfd_get_symbol_leading_char (link_info.output_bfd) != 0; |
| 6378 | |
| 6379 | h->u.def.section = h->u.def.section->output_section; |
| 6380 | if (h->root.string[4 + has_lead] == 'o') |
| 6381 | { |
| 6382 | /* __stop_ */ |
| 6383 | h->u.def.value = TO_ADDR (h->u.def.section->size); |
| 6384 | } |
| 6385 | } |
| 6386 | } |
| 6387 | |
| 6388 | static void |
| 6389 | lang_finalize_start_stop (void) |
| 6390 | { |
| 6391 | foreach_start_stop (set_start_stop); |
| 6392 | } |
| 6393 | |
| 6394 | static void |
| 6395 | lang_end (void) |
| 6396 | { |
| 6397 | struct bfd_link_hash_entry *h; |
| 6398 | bfd_boolean warn; |
| 6399 | |
| 6400 | if ((bfd_link_relocatable (&link_info) && !link_info.gc_sections) |
| 6401 | || bfd_link_dll (&link_info)) |
| 6402 | warn = entry_from_cmdline; |
| 6403 | else |
| 6404 | warn = TRUE; |
| 6405 | |
| 6406 | /* Force the user to specify a root when generating a relocatable with |
| 6407 | --gc-sections, unless --gc-keep-exported was also given. */ |
| 6408 | if (bfd_link_relocatable (&link_info) |
| 6409 | && link_info.gc_sections |
| 6410 | && !link_info.gc_keep_exported |
| 6411 | && !(entry_from_cmdline || undef_from_cmdline)) |
| 6412 | einfo (_("%F%P: gc-sections requires either an entry or " |
| 6413 | "an undefined symbol\n")); |
| 6414 | |
| 6415 | if (entry_symbol.name == NULL) |
| 6416 | { |
| 6417 | /* No entry has been specified. Look for the default entry, but |
| 6418 | don't warn if we don't find it. */ |
| 6419 | entry_symbol.name = entry_symbol_default; |
| 6420 | warn = FALSE; |
| 6421 | } |
| 6422 | |
| 6423 | h = bfd_link_hash_lookup (link_info.hash, entry_symbol.name, |
| 6424 | FALSE, FALSE, TRUE); |
| 6425 | if (h != NULL |
| 6426 | && (h->type == bfd_link_hash_defined |
| 6427 | || h->type == bfd_link_hash_defweak) |
| 6428 | && h->u.def.section->output_section != NULL) |
| 6429 | { |
| 6430 | bfd_vma val; |
| 6431 | |
| 6432 | val = (h->u.def.value |
| 6433 | + bfd_get_section_vma (link_info.output_bfd, |
| 6434 | h->u.def.section->output_section) |
| 6435 | + h->u.def.section->output_offset); |
| 6436 | if (!bfd_set_start_address (link_info.output_bfd, val)) |
| 6437 | einfo (_("%F%P: %s: can't set start address\n"), entry_symbol.name); |
| 6438 | } |
| 6439 | else |
| 6440 | { |
| 6441 | bfd_vma val; |
| 6442 | const char *send; |
| 6443 | |
| 6444 | /* We couldn't find the entry symbol. Try parsing it as a |
| 6445 | number. */ |
| 6446 | val = bfd_scan_vma (entry_symbol.name, &send, 0); |
| 6447 | if (*send == '\0') |
| 6448 | { |
| 6449 | if (!bfd_set_start_address (link_info.output_bfd, val)) |
| 6450 | einfo (_("%F%P: can't set start address\n")); |
| 6451 | } |
| 6452 | else |
| 6453 | { |
| 6454 | asection *ts; |
| 6455 | |
| 6456 | /* Can't find the entry symbol, and it's not a number. Use |
| 6457 | the first address in the text section. */ |
| 6458 | ts = bfd_get_section_by_name (link_info.output_bfd, entry_section); |
| 6459 | if (ts != NULL) |
| 6460 | { |
| 6461 | if (warn) |
| 6462 | einfo (_("%P: warning: cannot find entry symbol %s;" |
| 6463 | " defaulting to %V\n"), |
| 6464 | entry_symbol.name, |
| 6465 | bfd_get_section_vma (link_info.output_bfd, ts)); |
| 6466 | if (!(bfd_set_start_address |
| 6467 | (link_info.output_bfd, |
| 6468 | bfd_get_section_vma (link_info.output_bfd, ts)))) |
| 6469 | einfo (_("%F%P: can't set start address\n")); |
| 6470 | } |
| 6471 | else |
| 6472 | { |
| 6473 | if (warn) |
| 6474 | einfo (_("%P: warning: cannot find entry symbol %s;" |
| 6475 | " not setting start address\n"), |
| 6476 | entry_symbol.name); |
| 6477 | } |
| 6478 | } |
| 6479 | } |
| 6480 | } |
| 6481 | |
| 6482 | /* This is a small function used when we want to ignore errors from |
| 6483 | BFD. */ |
| 6484 | |
| 6485 | static void |
| 6486 | ignore_bfd_errors (const char *fmt ATTRIBUTE_UNUSED, |
| 6487 | va_list ap ATTRIBUTE_UNUSED) |
| 6488 | { |
| 6489 | /* Don't do anything. */ |
| 6490 | } |
| 6491 | |
| 6492 | /* Check that the architecture of all the input files is compatible |
| 6493 | with the output file. Also call the backend to let it do any |
| 6494 | other checking that is needed. */ |
| 6495 | |
| 6496 | static void |
| 6497 | lang_check (void) |
| 6498 | { |
| 6499 | lang_statement_union_type *file; |
| 6500 | bfd *input_bfd; |
| 6501 | const bfd_arch_info_type *compatible; |
| 6502 | |
| 6503 | for (file = file_chain.head; file != NULL; file = file->input_statement.next) |
| 6504 | { |
| 6505 | #ifdef ENABLE_PLUGINS |
| 6506 | /* Don't check format of files claimed by plugin. */ |
| 6507 | if (file->input_statement.flags.claimed) |
| 6508 | continue; |
| 6509 | #endif /* ENABLE_PLUGINS */ |
| 6510 | input_bfd = file->input_statement.the_bfd; |
| 6511 | compatible |
| 6512 | = bfd_arch_get_compatible (input_bfd, link_info.output_bfd, |
| 6513 | command_line.accept_unknown_input_arch); |
| 6514 | |
| 6515 | /* In general it is not possible to perform a relocatable |
| 6516 | link between differing object formats when the input |
| 6517 | file has relocations, because the relocations in the |
| 6518 | input format may not have equivalent representations in |
| 6519 | the output format (and besides BFD does not translate |
| 6520 | relocs for other link purposes than a final link). */ |
| 6521 | if ((bfd_link_relocatable (&link_info) |
| 6522 | || link_info.emitrelocations) |
| 6523 | && (compatible == NULL |
| 6524 | || (bfd_get_flavour (input_bfd) |
| 6525 | != bfd_get_flavour (link_info.output_bfd))) |
| 6526 | && (bfd_get_file_flags (input_bfd) & HAS_RELOC) != 0) |
| 6527 | { |
| 6528 | einfo (_("%F%P: relocatable linking with relocations from" |
| 6529 | " format %s (%pB) to format %s (%pB) is not supported\n"), |
| 6530 | bfd_get_target (input_bfd), input_bfd, |
| 6531 | bfd_get_target (link_info.output_bfd), link_info.output_bfd); |
| 6532 | /* einfo with %F exits. */ |
| 6533 | } |
| 6534 | |
| 6535 | if (compatible == NULL) |
| 6536 | { |
| 6537 | if (command_line.warn_mismatch) |
| 6538 | einfo (_("%X%P: %s architecture of input file `%pB'" |
| 6539 | " is incompatible with %s output\n"), |
| 6540 | bfd_printable_name (input_bfd), input_bfd, |
| 6541 | bfd_printable_name (link_info.output_bfd)); |
| 6542 | } |
| 6543 | else if (bfd_count_sections (input_bfd)) |
| 6544 | { |
| 6545 | /* If the input bfd has no contents, it shouldn't set the |
| 6546 | private data of the output bfd. */ |
| 6547 | |
| 6548 | bfd_error_handler_type pfn = NULL; |
| 6549 | |
| 6550 | /* If we aren't supposed to warn about mismatched input |
| 6551 | files, temporarily set the BFD error handler to a |
| 6552 | function which will do nothing. We still want to call |
| 6553 | bfd_merge_private_bfd_data, since it may set up |
| 6554 | information which is needed in the output file. */ |
| 6555 | if (!command_line.warn_mismatch) |
| 6556 | pfn = bfd_set_error_handler (ignore_bfd_errors); |
| 6557 | if (!bfd_merge_private_bfd_data (input_bfd, &link_info)) |
| 6558 | { |
| 6559 | if (command_line.warn_mismatch) |
| 6560 | einfo (_("%X%P: failed to merge target specific data" |
| 6561 | " of file %pB\n"), input_bfd); |
| 6562 | } |
| 6563 | if (!command_line.warn_mismatch) |
| 6564 | bfd_set_error_handler (pfn); |
| 6565 | } |
| 6566 | } |
| 6567 | } |
| 6568 | |
| 6569 | /* Look through all the global common symbols and attach them to the |
| 6570 | correct section. The -sort-common command line switch may be used |
| 6571 | to roughly sort the entries by alignment. */ |
| 6572 | |
| 6573 | static void |
| 6574 | lang_common (void) |
| 6575 | { |
| 6576 | if (link_info.inhibit_common_definition) |
| 6577 | return; |
| 6578 | if (bfd_link_relocatable (&link_info) |
| 6579 | && !command_line.force_common_definition) |
| 6580 | return; |
| 6581 | |
| 6582 | if (!config.sort_common) |
| 6583 | bfd_link_hash_traverse (link_info.hash, lang_one_common, NULL); |
| 6584 | else |
| 6585 | { |
| 6586 | unsigned int power; |
| 6587 | |
| 6588 | if (config.sort_common == sort_descending) |
| 6589 | { |
| 6590 | for (power = 4; power > 0; power--) |
| 6591 | bfd_link_hash_traverse (link_info.hash, lang_one_common, &power); |
| 6592 | |
| 6593 | power = 0; |
| 6594 | bfd_link_hash_traverse (link_info.hash, lang_one_common, &power); |
| 6595 | } |
| 6596 | else |
| 6597 | { |
| 6598 | for (power = 0; power <= 4; power++) |
| 6599 | bfd_link_hash_traverse (link_info.hash, lang_one_common, &power); |
| 6600 | |
| 6601 | power = (unsigned int) -1; |
| 6602 | bfd_link_hash_traverse (link_info.hash, lang_one_common, &power); |
| 6603 | } |
| 6604 | } |
| 6605 | } |
| 6606 | |
| 6607 | /* Place one common symbol in the correct section. */ |
| 6608 | |
| 6609 | static bfd_boolean |
| 6610 | lang_one_common (struct bfd_link_hash_entry *h, void *info) |
| 6611 | { |
| 6612 | unsigned int power_of_two; |
| 6613 | bfd_vma size; |
| 6614 | asection *section; |
| 6615 | |
| 6616 | if (h->type != bfd_link_hash_common) |
| 6617 | return TRUE; |
| 6618 | |
| 6619 | size = h->u.c.size; |
| 6620 | power_of_two = h->u.c.p->alignment_power; |
| 6621 | |
| 6622 | if (config.sort_common == sort_descending |
| 6623 | && power_of_two < *(unsigned int *) info) |
| 6624 | return TRUE; |
| 6625 | else if (config.sort_common == sort_ascending |
| 6626 | && power_of_two > *(unsigned int *) info) |
| 6627 | return TRUE; |
| 6628 | |
| 6629 | section = h->u.c.p->section; |
| 6630 | if (!bfd_define_common_symbol (link_info.output_bfd, &link_info, h)) |
| 6631 | einfo (_("%F%P: could not define common symbol `%pT': %E\n"), |
| 6632 | h->root.string); |
| 6633 | |
| 6634 | if (config.map_file != NULL) |
| 6635 | { |
| 6636 | static bfd_boolean header_printed; |
| 6637 | int len; |
| 6638 | char *name; |
| 6639 | char buf[50]; |
| 6640 | |
| 6641 | if (!header_printed) |
| 6642 | { |
| 6643 | minfo (_("\nAllocating common symbols\n")); |
| 6644 | minfo (_("Common symbol size file\n\n")); |
| 6645 | header_printed = TRUE; |
| 6646 | } |
| 6647 | |
| 6648 | name = bfd_demangle (link_info.output_bfd, h->root.string, |
| 6649 | DMGL_ANSI | DMGL_PARAMS); |
| 6650 | if (name == NULL) |
| 6651 | { |
| 6652 | minfo ("%s", h->root.string); |
| 6653 | len = strlen (h->root.string); |
| 6654 | } |
| 6655 | else |
| 6656 | { |
| 6657 | minfo ("%s", name); |
| 6658 | len = strlen (name); |
| 6659 | free (name); |
| 6660 | } |
| 6661 | |
| 6662 | if (len >= 19) |
| 6663 | { |
| 6664 | print_nl (); |
| 6665 | len = 0; |
| 6666 | } |
| 6667 | while (len < 20) |
| 6668 | { |
| 6669 | print_space (); |
| 6670 | ++len; |
| 6671 | } |
| 6672 | |
| 6673 | minfo ("0x"); |
| 6674 | if (size <= 0xffffffff) |
| 6675 | sprintf (buf, "%lx", (unsigned long) size); |
| 6676 | else |
| 6677 | sprintf_vma (buf, size); |
| 6678 | minfo ("%s", buf); |
| 6679 | len = strlen (buf); |
| 6680 | |
| 6681 | while (len < 16) |
| 6682 | { |
| 6683 | print_space (); |
| 6684 | ++len; |
| 6685 | } |
| 6686 | |
| 6687 | minfo ("%pB\n", section->owner); |
| 6688 | } |
| 6689 | |
| 6690 | return TRUE; |
| 6691 | } |
| 6692 | |
| 6693 | /* Handle a single orphan section S, placing the orphan into an appropriate |
| 6694 | output section. The effects of the --orphan-handling command line |
| 6695 | option are handled here. */ |
| 6696 | |
| 6697 | static void |
| 6698 | ldlang_place_orphan (asection *s) |
| 6699 | { |
| 6700 | if (config.orphan_handling == orphan_handling_discard) |
| 6701 | { |
| 6702 | lang_output_section_statement_type *os; |
| 6703 | os = lang_output_section_statement_lookup (DISCARD_SECTION_NAME, 0, |
| 6704 | TRUE); |
| 6705 | if (os->addr_tree == NULL |
| 6706 | && (bfd_link_relocatable (&link_info) |
| 6707 | || (s->flags & (SEC_LOAD | SEC_ALLOC)) == 0)) |
| 6708 | os->addr_tree = exp_intop (0); |
| 6709 | lang_add_section (&os->children, s, NULL, os); |
| 6710 | } |
| 6711 | else |
| 6712 | { |
| 6713 | lang_output_section_statement_type *os; |
| 6714 | const char *name = s->name; |
| 6715 | int constraint = 0; |
| 6716 | |
| 6717 | if (config.orphan_handling == orphan_handling_error) |
| 6718 | einfo (_("%X%P: error: unplaced orphan section `%pA' from `%pB'\n"), |
| 6719 | s, s->owner); |
| 6720 | |
| 6721 | if (config.unique_orphan_sections || unique_section_p (s, NULL)) |
| 6722 | constraint = SPECIAL; |
| 6723 | |
| 6724 | os = ldemul_place_orphan (s, name, constraint); |
| 6725 | if (os == NULL) |
| 6726 | { |
| 6727 | os = lang_output_section_statement_lookup (name, constraint, TRUE); |
| 6728 | if (os->addr_tree == NULL |
| 6729 | && (bfd_link_relocatable (&link_info) |
| 6730 | || (s->flags & (SEC_LOAD | SEC_ALLOC)) == 0)) |
| 6731 | os->addr_tree = exp_intop (0); |
| 6732 | lang_add_section (&os->children, s, NULL, os); |
| 6733 | } |
| 6734 | |
| 6735 | if (config.orphan_handling == orphan_handling_warn) |
| 6736 | einfo (_("%P: warning: orphan section `%pA' from `%pB' being " |
| 6737 | "placed in section `%s'\n"), |
| 6738 | s, s->owner, os->name); |
| 6739 | } |
| 6740 | } |
| 6741 | |
| 6742 | /* Run through the input files and ensure that every input section has |
| 6743 | somewhere to go. If one is found without a destination then create |
| 6744 | an input request and place it into the statement tree. */ |
| 6745 | |
| 6746 | static void |
| 6747 | lang_place_orphans (void) |
| 6748 | { |
| 6749 | LANG_FOR_EACH_INPUT_STATEMENT (file) |
| 6750 | { |
| 6751 | asection *s; |
| 6752 | |
| 6753 | for (s = file->the_bfd->sections; s != NULL; s = s->next) |
| 6754 | { |
| 6755 | if (s->output_section == NULL) |
| 6756 | { |
| 6757 | /* This section of the file is not attached, root |
| 6758 | around for a sensible place for it to go. */ |
| 6759 | |
| 6760 | if (file->flags.just_syms) |
| 6761 | bfd_link_just_syms (file->the_bfd, s, &link_info); |
| 6762 | else if (lang_discard_section_p (s)) |
| 6763 | s->output_section = bfd_abs_section_ptr; |
| 6764 | else if (strcmp (s->name, "COMMON") == 0) |
| 6765 | { |
| 6766 | /* This is a lonely common section which must have |
| 6767 | come from an archive. We attach to the section |
| 6768 | with the wildcard. */ |
| 6769 | if (!bfd_link_relocatable (&link_info) |
| 6770 | || command_line.force_common_definition) |
| 6771 | { |
| 6772 | if (default_common_section == NULL) |
| 6773 | default_common_section |
| 6774 | = lang_output_section_statement_lookup (".bss", 0, |
| 6775 | TRUE); |
| 6776 | lang_add_section (&default_common_section->children, s, |
| 6777 | NULL, default_common_section); |
| 6778 | } |
| 6779 | } |
| 6780 | else |
| 6781 | ldlang_place_orphan (s); |
| 6782 | } |
| 6783 | } |
| 6784 | } |
| 6785 | } |
| 6786 | |
| 6787 | void |
| 6788 | lang_set_flags (lang_memory_region_type *ptr, const char *flags, int invert) |
| 6789 | { |
| 6790 | flagword *ptr_flags; |
| 6791 | |
| 6792 | ptr_flags = invert ? &ptr->not_flags : &ptr->flags; |
| 6793 | |
| 6794 | while (*flags) |
| 6795 | { |
| 6796 | switch (*flags) |
| 6797 | { |
| 6798 | /* PR 17900: An exclamation mark in the attributes reverses |
| 6799 | the sense of any of the attributes that follow. */ |
| 6800 | case '!': |
| 6801 | invert = !invert; |
| 6802 | ptr_flags = invert ? &ptr->not_flags : &ptr->flags; |
| 6803 | break; |
| 6804 | |
| 6805 | case 'A': case 'a': |
| 6806 | *ptr_flags |= SEC_ALLOC; |
| 6807 | break; |
| 6808 | |
| 6809 | case 'R': case 'r': |
| 6810 | *ptr_flags |= SEC_READONLY; |
| 6811 | break; |
| 6812 | |
| 6813 | case 'W': case 'w': |
| 6814 | *ptr_flags |= SEC_DATA; |
| 6815 | break; |
| 6816 | |
| 6817 | case 'X': case 'x': |
| 6818 | *ptr_flags |= SEC_CODE; |
| 6819 | break; |
| 6820 | |
| 6821 | case 'L': case 'l': |
| 6822 | case 'I': case 'i': |
| 6823 | *ptr_flags |= SEC_LOAD; |
| 6824 | break; |
| 6825 | |
| 6826 | default: |
| 6827 | einfo (_("%F%P: invalid character %c (%d) in flags\n"), |
| 6828 | *flags, *flags); |
| 6829 | break; |
| 6830 | } |
| 6831 | flags++; |
| 6832 | } |
| 6833 | } |
| 6834 | |
| 6835 | /* Call a function on each input file. This function will be called |
| 6836 | on an archive, but not on the elements. */ |
| 6837 | |
| 6838 | void |
| 6839 | lang_for_each_input_file (void (*func) (lang_input_statement_type *)) |
| 6840 | { |
| 6841 | lang_input_statement_type *f; |
| 6842 | |
| 6843 | for (f = &input_file_chain.head->input_statement; |
| 6844 | f != NULL; |
| 6845 | f = &f->next_real_file->input_statement) |
| 6846 | func (f); |
| 6847 | } |
| 6848 | |
| 6849 | /* Call a function on each file. The function will be called on all |
| 6850 | the elements of an archive which are included in the link, but will |
| 6851 | not be called on the archive file itself. */ |
| 6852 | |
| 6853 | void |
| 6854 | lang_for_each_file (void (*func) (lang_input_statement_type *)) |
| 6855 | { |
| 6856 | LANG_FOR_EACH_INPUT_STATEMENT (f) |
| 6857 | { |
| 6858 | func (f); |
| 6859 | } |
| 6860 | } |
| 6861 | |
| 6862 | void |
| 6863 | ldlang_add_file (lang_input_statement_type *entry) |
| 6864 | { |
| 6865 | lang_statement_append (&file_chain, |
| 6866 | (lang_statement_union_type *) entry, |
| 6867 | &entry->next); |
| 6868 | |
| 6869 | /* The BFD linker needs to have a list of all input BFDs involved in |
| 6870 | a link. */ |
| 6871 | ASSERT (entry->the_bfd->link.next == NULL); |
| 6872 | ASSERT (entry->the_bfd != link_info.output_bfd); |
| 6873 | |
| 6874 | *link_info.input_bfds_tail = entry->the_bfd; |
| 6875 | link_info.input_bfds_tail = &entry->the_bfd->link.next; |
| 6876 | entry->the_bfd->usrdata = entry; |
| 6877 | bfd_set_gp_size (entry->the_bfd, g_switch_value); |
| 6878 | |
| 6879 | /* Look through the sections and check for any which should not be |
| 6880 | included in the link. We need to do this now, so that we can |
| 6881 | notice when the backend linker tries to report multiple |
| 6882 | definition errors for symbols which are in sections we aren't |
| 6883 | going to link. FIXME: It might be better to entirely ignore |
| 6884 | symbols which are defined in sections which are going to be |
| 6885 | discarded. This would require modifying the backend linker for |
| 6886 | each backend which might set the SEC_LINK_ONCE flag. If we do |
| 6887 | this, we should probably handle SEC_EXCLUDE in the same way. */ |
| 6888 | |
| 6889 | bfd_map_over_sections (entry->the_bfd, section_already_linked, entry); |
| 6890 | } |
| 6891 | |
| 6892 | void |
| 6893 | lang_add_output (const char *name, int from_script) |
| 6894 | { |
| 6895 | /* Make -o on command line override OUTPUT in script. */ |
| 6896 | if (!had_output_filename || !from_script) |
| 6897 | { |
| 6898 | output_filename = name; |
| 6899 | had_output_filename = TRUE; |
| 6900 | } |
| 6901 | } |
| 6902 | |
| 6903 | lang_output_section_statement_type * |
| 6904 | lang_enter_output_section_statement (const char *output_section_statement_name, |
| 6905 | etree_type *address_exp, |
| 6906 | enum section_type sectype, |
| 6907 | etree_type *align, |
| 6908 | etree_type *subalign, |
| 6909 | etree_type *ebase, |
| 6910 | int constraint, |
| 6911 | int align_with_input) |
| 6912 | { |
| 6913 | lang_output_section_statement_type *os; |
| 6914 | |
| 6915 | os = lang_output_section_statement_lookup (output_section_statement_name, |
| 6916 | constraint, TRUE); |
| 6917 | current_section = os; |
| 6918 | |
| 6919 | if (os->addr_tree == NULL) |
| 6920 | { |
| 6921 | os->addr_tree = address_exp; |
| 6922 | } |
| 6923 | os->sectype = sectype; |
| 6924 | if (sectype != noload_section) |
| 6925 | os->flags = SEC_NO_FLAGS; |
| 6926 | else |
| 6927 | os->flags = SEC_NEVER_LOAD; |
| 6928 | os->block_value = 1; |
| 6929 | |
| 6930 | /* Make next things chain into subchain of this. */ |
| 6931 | push_stat_ptr (&os->children); |
| 6932 | |
| 6933 | os->align_lma_with_input = align_with_input == ALIGN_WITH_INPUT; |
| 6934 | if (os->align_lma_with_input && align != NULL) |
| 6935 | einfo (_("%F%P:%pS: error: align with input and explicit align specified\n"), |
| 6936 | NULL); |
| 6937 | |
| 6938 | os->subsection_alignment = subalign; |
| 6939 | os->section_alignment = align; |
| 6940 | |
| 6941 | os->load_base = ebase; |
| 6942 | return os; |
| 6943 | } |
| 6944 | |
| 6945 | void |
| 6946 | lang_final (void) |
| 6947 | { |
| 6948 | lang_output_statement_type *new_stmt; |
| 6949 | |
| 6950 | new_stmt = new_stat (lang_output_statement, stat_ptr); |
| 6951 | new_stmt->name = output_filename; |
| 6952 | } |
| 6953 | |
| 6954 | /* Reset the current counters in the regions. */ |
| 6955 | |
| 6956 | void |
| 6957 | lang_reset_memory_regions (void) |
| 6958 | { |
| 6959 | lang_memory_region_type *p = lang_memory_region_list; |
| 6960 | asection *o; |
| 6961 | lang_output_section_statement_type *os; |
| 6962 | |
| 6963 | for (p = lang_memory_region_list; p != NULL; p = p->next) |
| 6964 | { |
| 6965 | p->current = p->origin; |
| 6966 | p->last_os = NULL; |
| 6967 | } |
| 6968 | |
| 6969 | for (os = &lang_output_section_statement.head->output_section_statement; |
| 6970 | os != NULL; |
| 6971 | os = os->next) |
| 6972 | { |
| 6973 | os->processed_vma = FALSE; |
| 6974 | os->processed_lma = FALSE; |
| 6975 | } |
| 6976 | |
| 6977 | for (o = link_info.output_bfd->sections; o != NULL; o = o->next) |
| 6978 | { |
| 6979 | /* Save the last size for possible use by bfd_relax_section. */ |
| 6980 | o->rawsize = o->size; |
| 6981 | if (!(o->flags & SEC_FIXED_SIZE)) |
| 6982 | o->size = 0; |
| 6983 | } |
| 6984 | } |
| 6985 | |
| 6986 | /* Worker for lang_gc_sections_1. */ |
| 6987 | |
| 6988 | static void |
| 6989 | gc_section_callback (lang_wild_statement_type *ptr, |
| 6990 | struct wildcard_list *sec ATTRIBUTE_UNUSED, |
| 6991 | asection *section, |
| 6992 | struct flag_info *sflag_info ATTRIBUTE_UNUSED, |
| 6993 | lang_input_statement_type *file ATTRIBUTE_UNUSED, |
| 6994 | void *data ATTRIBUTE_UNUSED) |
| 6995 | { |
| 6996 | /* If the wild pattern was marked KEEP, the member sections |
| 6997 | should be as well. */ |
| 6998 | if (ptr->keep_sections) |
| 6999 | section->flags |= SEC_KEEP; |
| 7000 | } |
| 7001 | |
| 7002 | /* Iterate over sections marking them against GC. */ |
| 7003 | |
| 7004 | static void |
| 7005 | lang_gc_sections_1 (lang_statement_union_type *s) |
| 7006 | { |
| 7007 | for (; s != NULL; s = s->header.next) |
| 7008 | { |
| 7009 | switch (s->header.type) |
| 7010 | { |
| 7011 | case lang_wild_statement_enum: |
| 7012 | walk_wild (&s->wild_statement, gc_section_callback, NULL); |
| 7013 | break; |
| 7014 | case lang_constructors_statement_enum: |
| 7015 | lang_gc_sections_1 (constructor_list.head); |
| 7016 | break; |
| 7017 | case lang_output_section_statement_enum: |
| 7018 | lang_gc_sections_1 (s->output_section_statement.children.head); |
| 7019 | break; |
| 7020 | case lang_group_statement_enum: |
| 7021 | lang_gc_sections_1 (s->group_statement.children.head); |
| 7022 | break; |
| 7023 | default: |
| 7024 | break; |
| 7025 | } |
| 7026 | } |
| 7027 | } |
| 7028 | |
| 7029 | static void |
| 7030 | lang_gc_sections (void) |
| 7031 | { |
| 7032 | /* Keep all sections so marked in the link script. */ |
| 7033 | lang_gc_sections_1 (statement_list.head); |
| 7034 | |
| 7035 | /* SEC_EXCLUDE is ignored when doing a relocatable link, except in |
| 7036 | the special case of debug info. (See bfd/stabs.c) |
| 7037 | Twiddle the flag here, to simplify later linker code. */ |
| 7038 | if (bfd_link_relocatable (&link_info)) |
| 7039 | { |
| 7040 | LANG_FOR_EACH_INPUT_STATEMENT (f) |
| 7041 | { |
| 7042 | asection *sec; |
| 7043 | #ifdef ENABLE_PLUGINS |
| 7044 | if (f->flags.claimed) |
| 7045 | continue; |
| 7046 | #endif |
| 7047 | for (sec = f->the_bfd->sections; sec != NULL; sec = sec->next) |
| 7048 | if ((sec->flags & SEC_DEBUGGING) == 0) |
| 7049 | sec->flags &= ~SEC_EXCLUDE; |
| 7050 | } |
| 7051 | } |
| 7052 | |
| 7053 | if (link_info.gc_sections) |
| 7054 | bfd_gc_sections (link_info.output_bfd, &link_info); |
| 7055 | } |
| 7056 | |
| 7057 | /* Worker for lang_find_relro_sections_1. */ |
| 7058 | |
| 7059 | static void |
| 7060 | find_relro_section_callback (lang_wild_statement_type *ptr ATTRIBUTE_UNUSED, |
| 7061 | struct wildcard_list *sec ATTRIBUTE_UNUSED, |
| 7062 | asection *section, |
| 7063 | struct flag_info *sflag_info ATTRIBUTE_UNUSED, |
| 7064 | lang_input_statement_type *file ATTRIBUTE_UNUSED, |
| 7065 | void *data) |
| 7066 | { |
| 7067 | /* Discarded, excluded and ignored sections effectively have zero |
| 7068 | size. */ |
| 7069 | if (section->output_section != NULL |
| 7070 | && section->output_section->owner == link_info.output_bfd |
| 7071 | && (section->output_section->flags & SEC_EXCLUDE) == 0 |
| 7072 | && !IGNORE_SECTION (section) |
| 7073 | && section->size != 0) |
| 7074 | { |
| 7075 | bfd_boolean *has_relro_section = (bfd_boolean *) data; |
| 7076 | *has_relro_section = TRUE; |
| 7077 | } |
| 7078 | } |
| 7079 | |
| 7080 | /* Iterate over sections for relro sections. */ |
| 7081 | |
| 7082 | static void |
| 7083 | lang_find_relro_sections_1 (lang_statement_union_type *s, |
| 7084 | seg_align_type *seg, |
| 7085 | bfd_boolean *has_relro_section) |
| 7086 | { |
| 7087 | if (*has_relro_section) |
| 7088 | return; |
| 7089 | |
| 7090 | for (; s != NULL; s = s->header.next) |
| 7091 | { |
| 7092 | if (s == seg->relro_end_stat) |
| 7093 | break; |
| 7094 | |
| 7095 | switch (s->header.type) |
| 7096 | { |
| 7097 | case lang_wild_statement_enum: |
| 7098 | walk_wild (&s->wild_statement, |
| 7099 | find_relro_section_callback, |
| 7100 | has_relro_section); |
| 7101 | break; |
| 7102 | case lang_constructors_statement_enum: |
| 7103 | lang_find_relro_sections_1 (constructor_list.head, |
| 7104 | seg, has_relro_section); |
| 7105 | break; |
| 7106 | case lang_output_section_statement_enum: |
| 7107 | lang_find_relro_sections_1 (s->output_section_statement.children.head, |
| 7108 | seg, has_relro_section); |
| 7109 | break; |
| 7110 | case lang_group_statement_enum: |
| 7111 | lang_find_relro_sections_1 (s->group_statement.children.head, |
| 7112 | seg, has_relro_section); |
| 7113 | break; |
| 7114 | default: |
| 7115 | break; |
| 7116 | } |
| 7117 | } |
| 7118 | } |
| 7119 | |
| 7120 | static void |
| 7121 | lang_find_relro_sections (void) |
| 7122 | { |
| 7123 | bfd_boolean has_relro_section = FALSE; |
| 7124 | |
| 7125 | /* Check all sections in the link script. */ |
| 7126 | |
| 7127 | lang_find_relro_sections_1 (expld.dataseg.relro_start_stat, |
| 7128 | &expld.dataseg, &has_relro_section); |
| 7129 | |
| 7130 | if (!has_relro_section) |
| 7131 | link_info.relro = FALSE; |
| 7132 | } |
| 7133 | |
| 7134 | /* Relax all sections until bfd_relax_section gives up. */ |
| 7135 | |
| 7136 | void |
| 7137 | lang_relax_sections (bfd_boolean need_layout) |
| 7138 | { |
| 7139 | if (RELAXATION_ENABLED) |
| 7140 | { |
| 7141 | /* We may need more than one relaxation pass. */ |
| 7142 | int i = link_info.relax_pass; |
| 7143 | |
| 7144 | /* The backend can use it to determine the current pass. */ |
| 7145 | link_info.relax_pass = 0; |
| 7146 | |
| 7147 | while (i--) |
| 7148 | { |
| 7149 | /* Keep relaxing until bfd_relax_section gives up. */ |
| 7150 | bfd_boolean relax_again; |
| 7151 | |
| 7152 | link_info.relax_trip = -1; |
| 7153 | do |
| 7154 | { |
| 7155 | link_info.relax_trip++; |
| 7156 | |
| 7157 | /* Note: pe-dll.c does something like this also. If you find |
| 7158 | you need to change this code, you probably need to change |
| 7159 | pe-dll.c also. DJ */ |
| 7160 | |
| 7161 | /* Do all the assignments with our current guesses as to |
| 7162 | section sizes. */ |
| 7163 | lang_do_assignments (lang_assigning_phase_enum); |
| 7164 | |
| 7165 | /* We must do this after lang_do_assignments, because it uses |
| 7166 | size. */ |
| 7167 | lang_reset_memory_regions (); |
| 7168 | |
| 7169 | /* Perform another relax pass - this time we know where the |
| 7170 | globals are, so can make a better guess. */ |
| 7171 | relax_again = FALSE; |
| 7172 | lang_size_sections (&relax_again, FALSE); |
| 7173 | } |
| 7174 | while (relax_again); |
| 7175 | |
| 7176 | link_info.relax_pass++; |
| 7177 | } |
| 7178 | need_layout = TRUE; |
| 7179 | } |
| 7180 | |
| 7181 | if (need_layout) |
| 7182 | { |
| 7183 | /* Final extra sizing to report errors. */ |
| 7184 | lang_do_assignments (lang_assigning_phase_enum); |
| 7185 | lang_reset_memory_regions (); |
| 7186 | lang_size_sections (NULL, TRUE); |
| 7187 | } |
| 7188 | } |
| 7189 | |
| 7190 | #ifdef ENABLE_PLUGINS |
| 7191 | /* Find the insert point for the plugin's replacement files. We |
| 7192 | place them after the first claimed real object file, or if the |
| 7193 | first claimed object is an archive member, after the last real |
| 7194 | object file immediately preceding the archive. In the event |
| 7195 | no objects have been claimed at all, we return the first dummy |
| 7196 | object file on the list as the insert point; that works, but |
| 7197 | the callee must be careful when relinking the file_chain as it |
| 7198 | is not actually on that chain, only the statement_list and the |
| 7199 | input_file list; in that case, the replacement files must be |
| 7200 | inserted at the head of the file_chain. */ |
| 7201 | |
| 7202 | static lang_input_statement_type * |
| 7203 | find_replacements_insert_point (void) |
| 7204 | { |
| 7205 | lang_input_statement_type *claim1, *lastobject; |
| 7206 | lastobject = &input_file_chain.head->input_statement; |
| 7207 | for (claim1 = &file_chain.head->input_statement; |
| 7208 | claim1 != NULL; |
| 7209 | claim1 = &claim1->next->input_statement) |
| 7210 | { |
| 7211 | if (claim1->flags.claimed) |
| 7212 | return claim1->flags.claim_archive ? lastobject : claim1; |
| 7213 | /* Update lastobject if this is a real object file. */ |
| 7214 | if (claim1->the_bfd != NULL && claim1->the_bfd->my_archive == NULL) |
| 7215 | lastobject = claim1; |
| 7216 | } |
| 7217 | /* No files were claimed by the plugin. Choose the last object |
| 7218 | file found on the list (maybe the first, dummy entry) as the |
| 7219 | insert point. */ |
| 7220 | return lastobject; |
| 7221 | } |
| 7222 | |
| 7223 | /* Find where to insert ADD, an archive element or shared library |
| 7224 | added during a rescan. */ |
| 7225 | |
| 7226 | static lang_statement_union_type ** |
| 7227 | find_rescan_insertion (lang_input_statement_type *add) |
| 7228 | { |
| 7229 | bfd *add_bfd = add->the_bfd; |
| 7230 | lang_input_statement_type *f; |
| 7231 | lang_input_statement_type *last_loaded = NULL; |
| 7232 | lang_input_statement_type *before = NULL; |
| 7233 | lang_statement_union_type **iter = NULL; |
| 7234 | |
| 7235 | if (add_bfd->my_archive != NULL) |
| 7236 | add_bfd = add_bfd->my_archive; |
| 7237 | |
| 7238 | /* First look through the input file chain, to find an object file |
| 7239 | before the one we've rescanned. Normal object files always |
| 7240 | appear on both the input file chain and the file chain, so this |
| 7241 | lets us get quickly to somewhere near the correct place on the |
| 7242 | file chain if it is full of archive elements. Archives don't |
| 7243 | appear on the file chain, but if an element has been extracted |
| 7244 | then their input_statement->next points at it. */ |
| 7245 | for (f = &input_file_chain.head->input_statement; |
| 7246 | f != NULL; |
| 7247 | f = &f->next_real_file->input_statement) |
| 7248 | { |
| 7249 | if (f->the_bfd == add_bfd) |
| 7250 | { |
| 7251 | before = last_loaded; |
| 7252 | if (f->next != NULL) |
| 7253 | return &f->next->input_statement.next; |
| 7254 | } |
| 7255 | if (f->the_bfd != NULL && f->next != NULL) |
| 7256 | last_loaded = f; |
| 7257 | } |
| 7258 | |
| 7259 | for (iter = before ? &before->next : &file_chain.head->input_statement.next; |
| 7260 | *iter != NULL; |
| 7261 | iter = &(*iter)->input_statement.next) |
| 7262 | if (!(*iter)->input_statement.flags.claim_archive |
| 7263 | && (*iter)->input_statement.the_bfd->my_archive == NULL) |
| 7264 | break; |
| 7265 | |
| 7266 | return iter; |
| 7267 | } |
| 7268 | |
| 7269 | /* Insert SRCLIST into DESTLIST after given element by chaining |
| 7270 | on FIELD as the next-pointer. (Counterintuitively does not need |
| 7271 | a pointer to the actual after-node itself, just its chain field.) */ |
| 7272 | |
| 7273 | static void |
| 7274 | lang_list_insert_after (lang_statement_list_type *destlist, |
| 7275 | lang_statement_list_type *srclist, |
| 7276 | lang_statement_union_type **field) |
| 7277 | { |
| 7278 | *(srclist->tail) = *field; |
| 7279 | *field = srclist->head; |
| 7280 | if (destlist->tail == field) |
| 7281 | destlist->tail = srclist->tail; |
| 7282 | } |
| 7283 | |
| 7284 | /* Detach new nodes added to DESTLIST since the time ORIGLIST |
| 7285 | was taken as a copy of it and leave them in ORIGLIST. */ |
| 7286 | |
| 7287 | static void |
| 7288 | lang_list_remove_tail (lang_statement_list_type *destlist, |
| 7289 | lang_statement_list_type *origlist) |
| 7290 | { |
| 7291 | union lang_statement_union **savetail; |
| 7292 | /* Check that ORIGLIST really is an earlier state of DESTLIST. */ |
| 7293 | ASSERT (origlist->head == destlist->head); |
| 7294 | savetail = origlist->tail; |
| 7295 | origlist->head = *(savetail); |
| 7296 | origlist->tail = destlist->tail; |
| 7297 | destlist->tail = savetail; |
| 7298 | *savetail = NULL; |
| 7299 | } |
| 7300 | #endif /* ENABLE_PLUGINS */ |
| 7301 | |
| 7302 | /* Add NAME to the list of garbage collection entry points. */ |
| 7303 | |
| 7304 | void |
| 7305 | lang_add_gc_name (const char *name) |
| 7306 | { |
| 7307 | struct bfd_sym_chain *sym; |
| 7308 | |
| 7309 | if (name == NULL) |
| 7310 | return; |
| 7311 | |
| 7312 | sym = (struct bfd_sym_chain *) stat_alloc (sizeof (*sym)); |
| 7313 | |
| 7314 | sym->next = link_info.gc_sym_list; |
| 7315 | sym->name = name; |
| 7316 | link_info.gc_sym_list = sym; |
| 7317 | } |
| 7318 | |
| 7319 | /* Check relocations. */ |
| 7320 | |
| 7321 | static void |
| 7322 | lang_check_relocs (void) |
| 7323 | { |
| 7324 | if (link_info.check_relocs_after_open_input) |
| 7325 | { |
| 7326 | bfd *abfd; |
| 7327 | |
| 7328 | for (abfd = link_info.input_bfds; |
| 7329 | abfd != (bfd *) NULL; abfd = abfd->link.next) |
| 7330 | if (!bfd_link_check_relocs (abfd, &link_info)) |
| 7331 | { |
| 7332 | /* No object output, fail return. */ |
| 7333 | config.make_executable = FALSE; |
| 7334 | /* Note: we do not abort the loop, but rather |
| 7335 | continue the scan in case there are other |
| 7336 | bad relocations to report. */ |
| 7337 | } |
| 7338 | } |
| 7339 | } |
| 7340 | |
| 7341 | /* Look through all output sections looking for places where we can |
| 7342 | propagate forward the lma region. */ |
| 7343 | |
| 7344 | static void |
| 7345 | lang_propagate_lma_regions (void) |
| 7346 | { |
| 7347 | lang_output_section_statement_type *os; |
| 7348 | |
| 7349 | for (os = &lang_output_section_statement.head->output_section_statement; |
| 7350 | os != NULL; |
| 7351 | os = os->next) |
| 7352 | { |
| 7353 | if (os->prev != NULL |
| 7354 | && os->lma_region == NULL |
| 7355 | && os->load_base == NULL |
| 7356 | && os->addr_tree == NULL |
| 7357 | && os->region == os->prev->region) |
| 7358 | os->lma_region = os->prev->lma_region; |
| 7359 | } |
| 7360 | } |
| 7361 | |
| 7362 | void |
| 7363 | lang_process (void) |
| 7364 | { |
| 7365 | /* Finalize dynamic list. */ |
| 7366 | if (link_info.dynamic_list) |
| 7367 | lang_finalize_version_expr_head (&link_info.dynamic_list->head); |
| 7368 | |
| 7369 | current_target = default_target; |
| 7370 | |
| 7371 | /* Open the output file. */ |
| 7372 | lang_for_each_statement (ldlang_open_output); |
| 7373 | init_opb (); |
| 7374 | |
| 7375 | ldemul_create_output_section_statements (); |
| 7376 | |
| 7377 | /* Add to the hash table all undefineds on the command line. */ |
| 7378 | lang_place_undefineds (); |
| 7379 | |
| 7380 | if (!bfd_section_already_linked_table_init ()) |
| 7381 | einfo (_("%F%P: can not create hash table: %E\n")); |
| 7382 | |
| 7383 | /* Create a bfd for each input file. */ |
| 7384 | current_target = default_target; |
| 7385 | lang_statement_iteration++; |
| 7386 | open_input_bfds (statement_list.head, OPEN_BFD_NORMAL); |
| 7387 | /* open_input_bfds also handles assignments, so we can give values |
| 7388 | to symbolic origin/length now. */ |
| 7389 | lang_do_memory_regions (); |
| 7390 | |
| 7391 | #ifdef ENABLE_PLUGINS |
| 7392 | if (link_info.lto_plugin_active) |
| 7393 | { |
| 7394 | lang_statement_list_type added; |
| 7395 | lang_statement_list_type files, inputfiles; |
| 7396 | |
| 7397 | /* Now all files are read, let the plugin(s) decide if there |
| 7398 | are any more to be added to the link before we call the |
| 7399 | emulation's after_open hook. We create a private list of |
| 7400 | input statements for this purpose, which we will eventually |
| 7401 | insert into the global statement list after the first claimed |
| 7402 | file. */ |
| 7403 | added = *stat_ptr; |
| 7404 | /* We need to manipulate all three chains in synchrony. */ |
| 7405 | files = file_chain; |
| 7406 | inputfiles = input_file_chain; |
| 7407 | if (plugin_call_all_symbols_read ()) |
| 7408 | einfo (_("%F%P: %s: plugin reported error after all symbols read\n"), |
| 7409 | plugin_error_plugin ()); |
| 7410 | /* Open any newly added files, updating the file chains. */ |
| 7411 | open_input_bfds (*added.tail, OPEN_BFD_NORMAL); |
| 7412 | /* Restore the global list pointer now they have all been added. */ |
| 7413 | lang_list_remove_tail (stat_ptr, &added); |
| 7414 | /* And detach the fresh ends of the file lists. */ |
| 7415 | lang_list_remove_tail (&file_chain, &files); |
| 7416 | lang_list_remove_tail (&input_file_chain, &inputfiles); |
| 7417 | /* Were any new files added? */ |
| 7418 | if (added.head != NULL) |
| 7419 | { |
| 7420 | /* If so, we will insert them into the statement list immediately |
| 7421 | after the first input file that was claimed by the plugin. */ |
| 7422 | plugin_insert = find_replacements_insert_point (); |
| 7423 | /* If a plugin adds input files without having claimed any, we |
| 7424 | don't really have a good idea where to place them. Just putting |
| 7425 | them at the start or end of the list is liable to leave them |
| 7426 | outside the crtbegin...crtend range. */ |
| 7427 | ASSERT (plugin_insert != NULL); |
| 7428 | /* Splice the new statement list into the old one. */ |
| 7429 | lang_list_insert_after (stat_ptr, &added, |
| 7430 | &plugin_insert->header.next); |
| 7431 | /* Likewise for the file chains. */ |
| 7432 | lang_list_insert_after (&input_file_chain, &inputfiles, |
| 7433 | &plugin_insert->next_real_file); |
| 7434 | /* We must be careful when relinking file_chain; we may need to |
| 7435 | insert the new files at the head of the list if the insert |
| 7436 | point chosen is the dummy first input file. */ |
| 7437 | if (plugin_insert->filename) |
| 7438 | lang_list_insert_after (&file_chain, &files, &plugin_insert->next); |
| 7439 | else |
| 7440 | lang_list_insert_after (&file_chain, &files, &file_chain.head); |
| 7441 | |
| 7442 | /* Rescan archives in case new undefined symbols have appeared. */ |
| 7443 | files = file_chain; |
| 7444 | lang_statement_iteration++; |
| 7445 | open_input_bfds (statement_list.head, OPEN_BFD_RESCAN); |
| 7446 | lang_list_remove_tail (&file_chain, &files); |
| 7447 | while (files.head != NULL) |
| 7448 | { |
| 7449 | lang_statement_union_type **insert; |
| 7450 | lang_statement_union_type **iter, *temp; |
| 7451 | bfd *my_arch; |
| 7452 | |
| 7453 | insert = find_rescan_insertion (&files.head->input_statement); |
| 7454 | /* All elements from an archive can be added at once. */ |
| 7455 | iter = &files.head->input_statement.next; |
| 7456 | my_arch = files.head->input_statement.the_bfd->my_archive; |
| 7457 | if (my_arch != NULL) |
| 7458 | for (; *iter != NULL; iter = &(*iter)->input_statement.next) |
| 7459 | if ((*iter)->input_statement.the_bfd->my_archive != my_arch) |
| 7460 | break; |
| 7461 | temp = *insert; |
| 7462 | *insert = files.head; |
| 7463 | files.head = *iter; |
| 7464 | *iter = temp; |
| 7465 | if (my_arch != NULL) |
| 7466 | { |
| 7467 | lang_input_statement_type *parent = my_arch->usrdata; |
| 7468 | if (parent != NULL) |
| 7469 | parent->next = (lang_statement_union_type *) |
| 7470 | ((char *) iter |
| 7471 | - offsetof (lang_input_statement_type, next)); |
| 7472 | } |
| 7473 | } |
| 7474 | } |
| 7475 | } |
| 7476 | #endif /* ENABLE_PLUGINS */ |
| 7477 | |
| 7478 | /* Make sure that nobody has tried to add a symbol to this list |
| 7479 | before now. */ |
| 7480 | ASSERT (link_info.gc_sym_list == NULL); |
| 7481 | |
| 7482 | link_info.gc_sym_list = &entry_symbol; |
| 7483 | |
| 7484 | if (entry_symbol.name == NULL) |
| 7485 | { |
| 7486 | link_info.gc_sym_list = ldlang_undef_chain_list_head; |
| 7487 | |
| 7488 | /* entry_symbol is normally initialied by a ENTRY definition in the |
| 7489 | linker script or the -e command line option. But if neither of |
| 7490 | these have been used, the target specific backend may still have |
| 7491 | provided an entry symbol via a call to lang_default_entry(). |
| 7492 | Unfortunately this value will not be processed until lang_end() |
| 7493 | is called, long after this function has finished. So detect this |
| 7494 | case here and add the target's entry symbol to the list of starting |
| 7495 | points for garbage collection resolution. */ |
| 7496 | lang_add_gc_name (entry_symbol_default); |
| 7497 | } |
| 7498 | |
| 7499 | lang_add_gc_name (link_info.init_function); |
| 7500 | lang_add_gc_name (link_info.fini_function); |
| 7501 | |
| 7502 | ldemul_after_open (); |
| 7503 | if (config.map_file != NULL) |
| 7504 | lang_print_asneeded (); |
| 7505 | |
| 7506 | bfd_section_already_linked_table_free (); |
| 7507 | |
| 7508 | /* Make sure that we're not mixing architectures. We call this |
| 7509 | after all the input files have been opened, but before we do any |
| 7510 | other processing, so that any operations merge_private_bfd_data |
| 7511 | does on the output file will be known during the rest of the |
| 7512 | link. */ |
| 7513 | lang_check (); |
| 7514 | |
| 7515 | /* Handle .exports instead of a version script if we're told to do so. */ |
| 7516 | if (command_line.version_exports_section) |
| 7517 | lang_do_version_exports_section (); |
| 7518 | |
| 7519 | /* Build all sets based on the information gathered from the input |
| 7520 | files. */ |
| 7521 | ldctor_build_sets (); |
| 7522 | |
| 7523 | /* Give initial values for __start and __stop symbols, so that ELF |
| 7524 | gc_sections will keep sections referenced by these symbols. Must |
| 7525 | be done before lang_do_assignments below. */ |
| 7526 | if (config.build_constructors) |
| 7527 | lang_init_start_stop (); |
| 7528 | |
| 7529 | /* PR 13683: We must rerun the assignments prior to running garbage |
| 7530 | collection in order to make sure that all symbol aliases are resolved. */ |
| 7531 | lang_do_assignments (lang_mark_phase_enum); |
| 7532 | expld.phase = lang_first_phase_enum; |
| 7533 | |
| 7534 | /* Size up the common data. */ |
| 7535 | lang_common (); |
| 7536 | |
| 7537 | /* Remove unreferenced sections if asked to. */ |
| 7538 | lang_gc_sections (); |
| 7539 | |
| 7540 | /* Check relocations. */ |
| 7541 | lang_check_relocs (); |
| 7542 | |
| 7543 | ldemul_after_check_relocs (); |
| 7544 | |
| 7545 | /* Update wild statements. */ |
| 7546 | update_wild_statements (statement_list.head); |
| 7547 | |
| 7548 | /* Run through the contours of the script and attach input sections |
| 7549 | to the correct output sections. */ |
| 7550 | lang_statement_iteration++; |
| 7551 | map_input_to_output_sections (statement_list.head, NULL, NULL); |
| 7552 | |
| 7553 | process_insert_statements (); |
| 7554 | |
| 7555 | /* Find any sections not attached explicitly and handle them. */ |
| 7556 | lang_place_orphans (); |
| 7557 | |
| 7558 | if (!bfd_link_relocatable (&link_info)) |
| 7559 | { |
| 7560 | asection *found; |
| 7561 | |
| 7562 | /* Merge SEC_MERGE sections. This has to be done after GC of |
| 7563 | sections, so that GCed sections are not merged, but before |
| 7564 | assigning dynamic symbols, since removing whole input sections |
| 7565 | is hard then. */ |
| 7566 | bfd_merge_sections (link_info.output_bfd, &link_info); |
| 7567 | |
| 7568 | /* Look for a text section and set the readonly attribute in it. */ |
| 7569 | found = bfd_get_section_by_name (link_info.output_bfd, ".text"); |
| 7570 | |
| 7571 | if (found != NULL) |
| 7572 | { |
| 7573 | if (config.text_read_only) |
| 7574 | found->flags |= SEC_READONLY; |
| 7575 | else |
| 7576 | found->flags &= ~SEC_READONLY; |
| 7577 | } |
| 7578 | } |
| 7579 | |
| 7580 | /* Copy forward lma regions for output sections in same lma region. */ |
| 7581 | lang_propagate_lma_regions (); |
| 7582 | |
| 7583 | /* Defining __start/__stop symbols early for --gc-sections to work |
| 7584 | around a glibc build problem can result in these symbols being |
| 7585 | defined when they should not be. Fix them now. */ |
| 7586 | if (config.build_constructors) |
| 7587 | lang_undef_start_stop (); |
| 7588 | |
| 7589 | /* Define .startof./.sizeof. symbols with preliminary values before |
| 7590 | dynamic symbols are created. */ |
| 7591 | if (!bfd_link_relocatable (&link_info)) |
| 7592 | lang_init_startof_sizeof (); |
| 7593 | |
| 7594 | /* Do anything special before sizing sections. This is where ELF |
| 7595 | and other back-ends size dynamic sections. */ |
| 7596 | ldemul_before_allocation (); |
| 7597 | |
| 7598 | /* We must record the program headers before we try to fix the |
| 7599 | section positions, since they will affect SIZEOF_HEADERS. */ |
| 7600 | lang_record_phdrs (); |
| 7601 | |
| 7602 | /* Check relro sections. */ |
| 7603 | if (link_info.relro && !bfd_link_relocatable (&link_info)) |
| 7604 | lang_find_relro_sections (); |
| 7605 | |
| 7606 | /* Size up the sections. */ |
| 7607 | lang_size_sections (NULL, !RELAXATION_ENABLED); |
| 7608 | |
| 7609 | /* See if anything special should be done now we know how big |
| 7610 | everything is. This is where relaxation is done. */ |
| 7611 | ldemul_after_allocation (); |
| 7612 | |
| 7613 | /* Fix any __start, __stop, .startof. or .sizeof. symbols. */ |
| 7614 | lang_finalize_start_stop (); |
| 7615 | |
| 7616 | /* Do all the assignments again, to report errors. Assignment |
| 7617 | statements are processed multiple times, updating symbols; In |
| 7618 | open_input_bfds, lang_do_assignments, and lang_size_sections. |
| 7619 | Since lang_relax_sections calls lang_do_assignments, symbols are |
| 7620 | also updated in ldemul_after_allocation. */ |
| 7621 | lang_do_assignments (lang_final_phase_enum); |
| 7622 | |
| 7623 | ldemul_finish (); |
| 7624 | |
| 7625 | /* Convert absolute symbols to section relative. */ |
| 7626 | ldexp_finalize_syms (); |
| 7627 | |
| 7628 | /* Make sure that the section addresses make sense. */ |
| 7629 | if (command_line.check_section_addresses) |
| 7630 | lang_check_section_addresses (); |
| 7631 | |
| 7632 | /* Check any required symbols are known. */ |
| 7633 | ldlang_check_require_defined_symbols (); |
| 7634 | |
| 7635 | lang_end (); |
| 7636 | } |
| 7637 | |
| 7638 | /* EXPORTED TO YACC */ |
| 7639 | |
| 7640 | void |
| 7641 | lang_add_wild (struct wildcard_spec *filespec, |
| 7642 | struct wildcard_list *section_list, |
| 7643 | bfd_boolean keep_sections) |
| 7644 | { |
| 7645 | struct wildcard_list *curr, *next; |
| 7646 | lang_wild_statement_type *new_stmt; |
| 7647 | |
| 7648 | /* Reverse the list as the parser puts it back to front. */ |
| 7649 | for (curr = section_list, section_list = NULL; |
| 7650 | curr != NULL; |
| 7651 | section_list = curr, curr = next) |
| 7652 | { |
| 7653 | next = curr->next; |
| 7654 | curr->next = section_list; |
| 7655 | } |
| 7656 | |
| 7657 | if (filespec != NULL && filespec->name != NULL) |
| 7658 | { |
| 7659 | if (strcmp (filespec->name, "*") == 0) |
| 7660 | filespec->name = NULL; |
| 7661 | else if (!wildcardp (filespec->name)) |
| 7662 | lang_has_input_file = TRUE; |
| 7663 | } |
| 7664 | |
| 7665 | new_stmt = new_stat (lang_wild_statement, stat_ptr); |
| 7666 | new_stmt->filename = NULL; |
| 7667 | new_stmt->filenames_sorted = FALSE; |
| 7668 | new_stmt->section_flag_list = NULL; |
| 7669 | new_stmt->exclude_name_list = NULL; |
| 7670 | if (filespec != NULL) |
| 7671 | { |
| 7672 | new_stmt->filename = filespec->name; |
| 7673 | new_stmt->filenames_sorted = filespec->sorted == by_name; |
| 7674 | new_stmt->section_flag_list = filespec->section_flag_list; |
| 7675 | new_stmt->exclude_name_list = filespec->exclude_name_list; |
| 7676 | } |
| 7677 | new_stmt->section_list = section_list; |
| 7678 | new_stmt->keep_sections = keep_sections; |
| 7679 | lang_list_init (&new_stmt->children); |
| 7680 | analyze_walk_wild_section_handler (new_stmt); |
| 7681 | } |
| 7682 | |
| 7683 | void |
| 7684 | lang_section_start (const char *name, etree_type *address, |
| 7685 | const segment_type *segment) |
| 7686 | { |
| 7687 | lang_address_statement_type *ad; |
| 7688 | |
| 7689 | ad = new_stat (lang_address_statement, stat_ptr); |
| 7690 | ad->section_name = name; |
| 7691 | ad->address = address; |
| 7692 | ad->segment = segment; |
| 7693 | } |
| 7694 | |
| 7695 | /* Set the start symbol to NAME. CMDLINE is nonzero if this is called |
| 7696 | because of a -e argument on the command line, or zero if this is |
| 7697 | called by ENTRY in a linker script. Command line arguments take |
| 7698 | precedence. */ |
| 7699 | |
| 7700 | void |
| 7701 | lang_add_entry (const char *name, bfd_boolean cmdline) |
| 7702 | { |
| 7703 | if (entry_symbol.name == NULL |
| 7704 | || cmdline |
| 7705 | || !entry_from_cmdline) |
| 7706 | { |
| 7707 | entry_symbol.name = name; |
| 7708 | entry_from_cmdline = cmdline; |
| 7709 | } |
| 7710 | } |
| 7711 | |
| 7712 | /* Set the default start symbol to NAME. .em files should use this, |
| 7713 | not lang_add_entry, to override the use of "start" if neither the |
| 7714 | linker script nor the command line specifies an entry point. NAME |
| 7715 | must be permanently allocated. */ |
| 7716 | void |
| 7717 | lang_default_entry (const char *name) |
| 7718 | { |
| 7719 | entry_symbol_default = name; |
| 7720 | } |
| 7721 | |
| 7722 | void |
| 7723 | lang_add_target (const char *name) |
| 7724 | { |
| 7725 | lang_target_statement_type *new_stmt; |
| 7726 | |
| 7727 | new_stmt = new_stat (lang_target_statement, stat_ptr); |
| 7728 | new_stmt->target = name; |
| 7729 | } |
| 7730 | |
| 7731 | void |
| 7732 | lang_add_map (const char *name) |
| 7733 | { |
| 7734 | while (*name) |
| 7735 | { |
| 7736 | switch (*name) |
| 7737 | { |
| 7738 | case 'F': |
| 7739 | map_option_f = TRUE; |
| 7740 | break; |
| 7741 | } |
| 7742 | name++; |
| 7743 | } |
| 7744 | } |
| 7745 | |
| 7746 | void |
| 7747 | lang_add_fill (fill_type *fill) |
| 7748 | { |
| 7749 | lang_fill_statement_type *new_stmt; |
| 7750 | |
| 7751 | new_stmt = new_stat (lang_fill_statement, stat_ptr); |
| 7752 | new_stmt->fill = fill; |
| 7753 | } |
| 7754 | |
| 7755 | void |
| 7756 | lang_add_data (int type, union etree_union *exp) |
| 7757 | { |
| 7758 | lang_data_statement_type *new_stmt; |
| 7759 | |
| 7760 | new_stmt = new_stat (lang_data_statement, stat_ptr); |
| 7761 | new_stmt->exp = exp; |
| 7762 | new_stmt->type = type; |
| 7763 | } |
| 7764 | |
| 7765 | /* Create a new reloc statement. RELOC is the BFD relocation type to |
| 7766 | generate. HOWTO is the corresponding howto structure (we could |
| 7767 | look this up, but the caller has already done so). SECTION is the |
| 7768 | section to generate a reloc against, or NAME is the name of the |
| 7769 | symbol to generate a reloc against. Exactly one of SECTION and |
| 7770 | NAME must be NULL. ADDEND is an expression for the addend. */ |
| 7771 | |
| 7772 | void |
| 7773 | lang_add_reloc (bfd_reloc_code_real_type reloc, |
| 7774 | reloc_howto_type *howto, |
| 7775 | asection *section, |
| 7776 | const char *name, |
| 7777 | union etree_union *addend) |
| 7778 | { |
| 7779 | lang_reloc_statement_type *p = new_stat (lang_reloc_statement, stat_ptr); |
| 7780 | |
| 7781 | p->reloc = reloc; |
| 7782 | p->howto = howto; |
| 7783 | p->section = section; |
| 7784 | p->name = name; |
| 7785 | p->addend_exp = addend; |
| 7786 | |
| 7787 | p->addend_value = 0; |
| 7788 | p->output_section = NULL; |
| 7789 | p->output_offset = 0; |
| 7790 | } |
| 7791 | |
| 7792 | lang_assignment_statement_type * |
| 7793 | lang_add_assignment (etree_type *exp) |
| 7794 | { |
| 7795 | lang_assignment_statement_type *new_stmt; |
| 7796 | |
| 7797 | new_stmt = new_stat (lang_assignment_statement, stat_ptr); |
| 7798 | new_stmt->exp = exp; |
| 7799 | return new_stmt; |
| 7800 | } |
| 7801 | |
| 7802 | void |
| 7803 | lang_add_attribute (enum statement_enum attribute) |
| 7804 | { |
| 7805 | new_statement (attribute, sizeof (lang_statement_header_type), stat_ptr); |
| 7806 | } |
| 7807 | |
| 7808 | void |
| 7809 | lang_startup (const char *name) |
| 7810 | { |
| 7811 | if (first_file->filename != NULL) |
| 7812 | { |
| 7813 | einfo (_("%F%P: multiple STARTUP files\n")); |
| 7814 | } |
| 7815 | first_file->filename = name; |
| 7816 | first_file->local_sym_name = name; |
| 7817 | first_file->flags.real = TRUE; |
| 7818 | } |
| 7819 | |
| 7820 | void |
| 7821 | lang_float (bfd_boolean maybe) |
| 7822 | { |
| 7823 | lang_float_flag = maybe; |
| 7824 | } |
| 7825 | |
| 7826 | |
| 7827 | /* Work out the load- and run-time regions from a script statement, and |
| 7828 | store them in *LMA_REGION and *REGION respectively. |
| 7829 | |
| 7830 | MEMSPEC is the name of the run-time region, or the value of |
| 7831 | DEFAULT_MEMORY_REGION if the statement didn't specify one. |
| 7832 | LMA_MEMSPEC is the name of the load-time region, or null if the |
| 7833 | statement didn't specify one.HAVE_LMA_P is TRUE if the statement |
| 7834 | had an explicit load address. |
| 7835 | |
| 7836 | It is an error to specify both a load region and a load address. */ |
| 7837 | |
| 7838 | static void |
| 7839 | lang_get_regions (lang_memory_region_type **region, |
| 7840 | lang_memory_region_type **lma_region, |
| 7841 | const char *memspec, |
| 7842 | const char *lma_memspec, |
| 7843 | bfd_boolean have_lma, |
| 7844 | bfd_boolean have_vma) |
| 7845 | { |
| 7846 | *lma_region = lang_memory_region_lookup (lma_memspec, FALSE); |
| 7847 | |
| 7848 | /* If no runtime region or VMA has been specified, but the load region |
| 7849 | has been specified, then use the load region for the runtime region |
| 7850 | as well. */ |
| 7851 | if (lma_memspec != NULL |
| 7852 | && !have_vma |
| 7853 | && strcmp (memspec, DEFAULT_MEMORY_REGION) == 0) |
| 7854 | *region = *lma_region; |
| 7855 | else |
| 7856 | *region = lang_memory_region_lookup (memspec, FALSE); |
| 7857 | |
| 7858 | if (have_lma && lma_memspec != 0) |
| 7859 | einfo (_("%X%P:%pS: section has both a load address and a load region\n"), |
| 7860 | NULL); |
| 7861 | } |
| 7862 | |
| 7863 | void |
| 7864 | lang_leave_output_section_statement (fill_type *fill, const char *memspec, |
| 7865 | lang_output_section_phdr_list *phdrs, |
| 7866 | const char *lma_memspec) |
| 7867 | { |
| 7868 | lang_get_regions (¤t_section->region, |
| 7869 | ¤t_section->lma_region, |
| 7870 | memspec, lma_memspec, |
| 7871 | current_section->load_base != NULL, |
| 7872 | current_section->addr_tree != NULL); |
| 7873 | |
| 7874 | current_section->fill = fill; |
| 7875 | current_section->phdrs = phdrs; |
| 7876 | pop_stat_ptr (); |
| 7877 | } |
| 7878 | |
| 7879 | void |
| 7880 | lang_statement_append (lang_statement_list_type *list, |
| 7881 | lang_statement_union_type *element, |
| 7882 | lang_statement_union_type **field) |
| 7883 | { |
| 7884 | *(list->tail) = element; |
| 7885 | list->tail = field; |
| 7886 | } |
| 7887 | |
| 7888 | /* Set the output format type. -oformat overrides scripts. */ |
| 7889 | |
| 7890 | void |
| 7891 | lang_add_output_format (const char *format, |
| 7892 | const char *big, |
| 7893 | const char *little, |
| 7894 | int from_script) |
| 7895 | { |
| 7896 | if (output_target == NULL || !from_script) |
| 7897 | { |
| 7898 | if (command_line.endian == ENDIAN_BIG |
| 7899 | && big != NULL) |
| 7900 | format = big; |
| 7901 | else if (command_line.endian == ENDIAN_LITTLE |
| 7902 | && little != NULL) |
| 7903 | format = little; |
| 7904 | |
| 7905 | output_target = format; |
| 7906 | } |
| 7907 | } |
| 7908 | |
| 7909 | void |
| 7910 | lang_add_insert (const char *where, int is_before) |
| 7911 | { |
| 7912 | lang_insert_statement_type *new_stmt; |
| 7913 | |
| 7914 | new_stmt = new_stat (lang_insert_statement, stat_ptr); |
| 7915 | new_stmt->where = where; |
| 7916 | new_stmt->is_before = is_before; |
| 7917 | saved_script_handle = previous_script_handle; |
| 7918 | } |
| 7919 | |
| 7920 | /* Enter a group. This creates a new lang_group_statement, and sets |
| 7921 | stat_ptr to build new statements within the group. */ |
| 7922 | |
| 7923 | void |
| 7924 | lang_enter_group (void) |
| 7925 | { |
| 7926 | lang_group_statement_type *g; |
| 7927 | |
| 7928 | g = new_stat (lang_group_statement, stat_ptr); |
| 7929 | lang_list_init (&g->children); |
| 7930 | push_stat_ptr (&g->children); |
| 7931 | } |
| 7932 | |
| 7933 | /* Leave a group. This just resets stat_ptr to start writing to the |
| 7934 | regular list of statements again. Note that this will not work if |
| 7935 | groups can occur inside anything else which can adjust stat_ptr, |
| 7936 | but currently they can't. */ |
| 7937 | |
| 7938 | void |
| 7939 | lang_leave_group (void) |
| 7940 | { |
| 7941 | pop_stat_ptr (); |
| 7942 | } |
| 7943 | |
| 7944 | /* Add a new program header. This is called for each entry in a PHDRS |
| 7945 | command in a linker script. */ |
| 7946 | |
| 7947 | void |
| 7948 | lang_new_phdr (const char *name, |
| 7949 | etree_type *type, |
| 7950 | bfd_boolean filehdr, |
| 7951 | bfd_boolean phdrs, |
| 7952 | etree_type *at, |
| 7953 | etree_type *flags) |
| 7954 | { |
| 7955 | struct lang_phdr *n, **pp; |
| 7956 | bfd_boolean hdrs; |
| 7957 | |
| 7958 | n = (struct lang_phdr *) stat_alloc (sizeof (struct lang_phdr)); |
| 7959 | n->next = NULL; |
| 7960 | n->name = name; |
| 7961 | n->type = exp_get_vma (type, 0, "program header type"); |
| 7962 | n->filehdr = filehdr; |
| 7963 | n->phdrs = phdrs; |
| 7964 | n->at = at; |
| 7965 | n->flags = flags; |
| 7966 | |
| 7967 | hdrs = n->type == 1 && (phdrs || filehdr); |
| 7968 | |
| 7969 | for (pp = &lang_phdr_list; *pp != NULL; pp = &(*pp)->next) |
| 7970 | if (hdrs |
| 7971 | && (*pp)->type == 1 |
| 7972 | && !((*pp)->filehdr || (*pp)->phdrs)) |
| 7973 | { |
| 7974 | einfo (_("%X%P:%pS: PHDRS and FILEHDR are not supported" |
| 7975 | " when prior PT_LOAD headers lack them\n"), NULL); |
| 7976 | hdrs = FALSE; |
| 7977 | } |
| 7978 | |
| 7979 | *pp = n; |
| 7980 | } |
| 7981 | |
| 7982 | /* Record the program header information in the output BFD. FIXME: We |
| 7983 | should not be calling an ELF specific function here. */ |
| 7984 | |
| 7985 | static void |
| 7986 | lang_record_phdrs (void) |
| 7987 | { |
| 7988 | unsigned int alc; |
| 7989 | asection **secs; |
| 7990 | lang_output_section_phdr_list *last; |
| 7991 | struct lang_phdr *l; |
| 7992 | lang_output_section_statement_type *os; |
| 7993 | |
| 7994 | alc = 10; |
| 7995 | secs = (asection **) xmalloc (alc * sizeof (asection *)); |
| 7996 | last = NULL; |
| 7997 | |
| 7998 | for (l = lang_phdr_list; l != NULL; l = l->next) |
| 7999 | { |
| 8000 | unsigned int c; |
| 8001 | flagword flags; |
| 8002 | bfd_vma at; |
| 8003 | |
| 8004 | c = 0; |
| 8005 | for (os = &lang_output_section_statement.head->output_section_statement; |
| 8006 | os != NULL; |
| 8007 | os = os->next) |
| 8008 | { |
| 8009 | lang_output_section_phdr_list *pl; |
| 8010 | |
| 8011 | if (os->constraint < 0) |
| 8012 | continue; |
| 8013 | |
| 8014 | pl = os->phdrs; |
| 8015 | if (pl != NULL) |
| 8016 | last = pl; |
| 8017 | else |
| 8018 | { |
| 8019 | if (os->sectype == noload_section |
| 8020 | || os->bfd_section == NULL |
| 8021 | || (os->bfd_section->flags & SEC_ALLOC) == 0) |
| 8022 | continue; |
| 8023 | |
| 8024 | /* Don't add orphans to PT_INTERP header. */ |
| 8025 | if (l->type == 3) |
| 8026 | continue; |
| 8027 | |
| 8028 | if (last == NULL) |
| 8029 | { |
| 8030 | lang_output_section_statement_type *tmp_os; |
| 8031 | |
| 8032 | /* If we have not run across a section with a program |
| 8033 | header assigned to it yet, then scan forwards to find |
| 8034 | one. This prevents inconsistencies in the linker's |
| 8035 | behaviour when a script has specified just a single |
| 8036 | header and there are sections in that script which are |
| 8037 | not assigned to it, and which occur before the first |
| 8038 | use of that header. See here for more details: |
| 8039 | http://sourceware.org/ml/binutils/2007-02/msg00291.html */ |
| 8040 | for (tmp_os = os; tmp_os; tmp_os = tmp_os->next) |
| 8041 | if (tmp_os->phdrs) |
| 8042 | { |
| 8043 | last = tmp_os->phdrs; |
| 8044 | break; |
| 8045 | } |
| 8046 | if (last == NULL) |
| 8047 | einfo (_("%F%P: no sections assigned to phdrs\n")); |
| 8048 | } |
| 8049 | pl = last; |
| 8050 | } |
| 8051 | |
| 8052 | if (os->bfd_section == NULL) |
| 8053 | continue; |
| 8054 | |
| 8055 | for (; pl != NULL; pl = pl->next) |
| 8056 | { |
| 8057 | if (strcmp (pl->name, l->name) == 0) |
| 8058 | { |
| 8059 | if (c >= alc) |
| 8060 | { |
| 8061 | alc *= 2; |
| 8062 | secs = (asection **) xrealloc (secs, |
| 8063 | alc * sizeof (asection *)); |
| 8064 | } |
| 8065 | secs[c] = os->bfd_section; |
| 8066 | ++c; |
| 8067 | pl->used = TRUE; |
| 8068 | } |
| 8069 | } |
| 8070 | } |
| 8071 | |
| 8072 | if (l->flags == NULL) |
| 8073 | flags = 0; |
| 8074 | else |
| 8075 | flags = exp_get_vma (l->flags, 0, "phdr flags"); |
| 8076 | |
| 8077 | if (l->at == NULL) |
| 8078 | at = 0; |
| 8079 | else |
| 8080 | at = exp_get_vma (l->at, 0, "phdr load address"); |
| 8081 | |
| 8082 | if (!bfd_record_phdr (link_info.output_bfd, l->type, |
| 8083 | l->flags != NULL, flags, l->at != NULL, |
| 8084 | at, l->filehdr, l->phdrs, c, secs)) |
| 8085 | einfo (_("%F%P: bfd_record_phdr failed: %E\n")); |
| 8086 | } |
| 8087 | |
| 8088 | free (secs); |
| 8089 | |
| 8090 | /* Make sure all the phdr assignments succeeded. */ |
| 8091 | for (os = &lang_output_section_statement.head->output_section_statement; |
| 8092 | os != NULL; |
| 8093 | os = os->next) |
| 8094 | { |
| 8095 | lang_output_section_phdr_list *pl; |
| 8096 | |
| 8097 | if (os->constraint < 0 |
| 8098 | || os->bfd_section == NULL) |
| 8099 | continue; |
| 8100 | |
| 8101 | for (pl = os->phdrs; |
| 8102 | pl != NULL; |
| 8103 | pl = pl->next) |
| 8104 | if (!pl->used && strcmp (pl->name, "NONE") != 0) |
| 8105 | einfo (_("%X%P: section `%s' assigned to non-existent phdr `%s'\n"), |
| 8106 | os->name, pl->name); |
| 8107 | } |
| 8108 | } |
| 8109 | |
| 8110 | /* Record a list of sections which may not be cross referenced. */ |
| 8111 | |
| 8112 | void |
| 8113 | lang_add_nocrossref (lang_nocrossref_type *l) |
| 8114 | { |
| 8115 | struct lang_nocrossrefs *n; |
| 8116 | |
| 8117 | n = (struct lang_nocrossrefs *) xmalloc (sizeof *n); |
| 8118 | n->next = nocrossref_list; |
| 8119 | n->list = l; |
| 8120 | n->onlyfirst = FALSE; |
| 8121 | nocrossref_list = n; |
| 8122 | |
| 8123 | /* Set notice_all so that we get informed about all symbols. */ |
| 8124 | link_info.notice_all = TRUE; |
| 8125 | } |
| 8126 | |
| 8127 | /* Record a section that cannot be referenced from a list of sections. */ |
| 8128 | |
| 8129 | void |
| 8130 | lang_add_nocrossref_to (lang_nocrossref_type *l) |
| 8131 | { |
| 8132 | lang_add_nocrossref (l); |
| 8133 | nocrossref_list->onlyfirst = TRUE; |
| 8134 | } |
| 8135 | \f |
| 8136 | /* Overlay handling. We handle overlays with some static variables. */ |
| 8137 | |
| 8138 | /* The overlay virtual address. */ |
| 8139 | static etree_type *overlay_vma; |
| 8140 | /* And subsection alignment. */ |
| 8141 | static etree_type *overlay_subalign; |
| 8142 | |
| 8143 | /* An expression for the maximum section size seen so far. */ |
| 8144 | static etree_type *overlay_max; |
| 8145 | |
| 8146 | /* A list of all the sections in this overlay. */ |
| 8147 | |
| 8148 | struct overlay_list { |
| 8149 | struct overlay_list *next; |
| 8150 | lang_output_section_statement_type *os; |
| 8151 | }; |
| 8152 | |
| 8153 | static struct overlay_list *overlay_list; |
| 8154 | |
| 8155 | /* Start handling an overlay. */ |
| 8156 | |
| 8157 | void |
| 8158 | lang_enter_overlay (etree_type *vma_expr, etree_type *subalign) |
| 8159 | { |
| 8160 | /* The grammar should prevent nested overlays from occurring. */ |
| 8161 | ASSERT (overlay_vma == NULL |
| 8162 | && overlay_subalign == NULL |
| 8163 | && overlay_max == NULL); |
| 8164 | |
| 8165 | overlay_vma = vma_expr; |
| 8166 | overlay_subalign = subalign; |
| 8167 | } |
| 8168 | |
| 8169 | /* Start a section in an overlay. We handle this by calling |
| 8170 | lang_enter_output_section_statement with the correct VMA. |
| 8171 | lang_leave_overlay sets up the LMA and memory regions. */ |
| 8172 | |
| 8173 | void |
| 8174 | lang_enter_overlay_section (const char *name) |
| 8175 | { |
| 8176 | struct overlay_list *n; |
| 8177 | etree_type *size; |
| 8178 | |
| 8179 | lang_enter_output_section_statement (name, overlay_vma, overlay_section, |
| 8180 | 0, overlay_subalign, 0, 0, 0); |
| 8181 | |
| 8182 | /* If this is the first section, then base the VMA of future |
| 8183 | sections on this one. This will work correctly even if `.' is |
| 8184 | used in the addresses. */ |
| 8185 | if (overlay_list == NULL) |
| 8186 | overlay_vma = exp_nameop (ADDR, name); |
| 8187 | |
| 8188 | /* Remember the section. */ |
| 8189 | n = (struct overlay_list *) xmalloc (sizeof *n); |
| 8190 | n->os = current_section; |
| 8191 | n->next = overlay_list; |
| 8192 | overlay_list = n; |
| 8193 | |
| 8194 | size = exp_nameop (SIZEOF, name); |
| 8195 | |
| 8196 | /* Arrange to work out the maximum section end address. */ |
| 8197 | if (overlay_max == NULL) |
| 8198 | overlay_max = size; |
| 8199 | else |
| 8200 | overlay_max = exp_binop (MAX_K, overlay_max, size); |
| 8201 | } |
| 8202 | |
| 8203 | /* Finish a section in an overlay. There isn't any special to do |
| 8204 | here. */ |
| 8205 | |
| 8206 | void |
| 8207 | lang_leave_overlay_section (fill_type *fill, |
| 8208 | lang_output_section_phdr_list *phdrs) |
| 8209 | { |
| 8210 | const char *name; |
| 8211 | char *clean, *s2; |
| 8212 | const char *s1; |
| 8213 | char *buf; |
| 8214 | |
| 8215 | name = current_section->name; |
| 8216 | |
| 8217 | /* For now, assume that DEFAULT_MEMORY_REGION is the run-time memory |
| 8218 | region and that no load-time region has been specified. It doesn't |
| 8219 | really matter what we say here, since lang_leave_overlay will |
| 8220 | override it. */ |
| 8221 | lang_leave_output_section_statement (fill, DEFAULT_MEMORY_REGION, phdrs, 0); |
| 8222 | |
| 8223 | /* Define the magic symbols. */ |
| 8224 | |
| 8225 | clean = (char *) xmalloc (strlen (name) + 1); |
| 8226 | s2 = clean; |
| 8227 | for (s1 = name; *s1 != '\0'; s1++) |
| 8228 | if (ISALNUM (*s1) || *s1 == '_') |
| 8229 | *s2++ = *s1; |
| 8230 | *s2 = '\0'; |
| 8231 | |
| 8232 | buf = (char *) xmalloc (strlen (clean) + sizeof "__load_start_"); |
| 8233 | sprintf (buf, "__load_start_%s", clean); |
| 8234 | lang_add_assignment (exp_provide (buf, |
| 8235 | exp_nameop (LOADADDR, name), |
| 8236 | FALSE)); |
| 8237 | |
| 8238 | buf = (char *) xmalloc (strlen (clean) + sizeof "__load_stop_"); |
| 8239 | sprintf (buf, "__load_stop_%s", clean); |
| 8240 | lang_add_assignment (exp_provide (buf, |
| 8241 | exp_binop ('+', |
| 8242 | exp_nameop (LOADADDR, name), |
| 8243 | exp_nameop (SIZEOF, name)), |
| 8244 | FALSE)); |
| 8245 | |
| 8246 | free (clean); |
| 8247 | } |
| 8248 | |
| 8249 | /* Finish an overlay. If there are any overlay wide settings, this |
| 8250 | looks through all the sections in the overlay and sets them. */ |
| 8251 | |
| 8252 | void |
| 8253 | lang_leave_overlay (etree_type *lma_expr, |
| 8254 | int nocrossrefs, |
| 8255 | fill_type *fill, |
| 8256 | const char *memspec, |
| 8257 | lang_output_section_phdr_list *phdrs, |
| 8258 | const char *lma_memspec) |
| 8259 | { |
| 8260 | lang_memory_region_type *region; |
| 8261 | lang_memory_region_type *lma_region; |
| 8262 | struct overlay_list *l; |
| 8263 | lang_nocrossref_type *nocrossref; |
| 8264 | |
| 8265 | lang_get_regions (®ion, &lma_region, |
| 8266 | memspec, lma_memspec, |
| 8267 | lma_expr != NULL, FALSE); |
| 8268 | |
| 8269 | nocrossref = NULL; |
| 8270 | |
| 8271 | /* After setting the size of the last section, set '.' to end of the |
| 8272 | overlay region. */ |
| 8273 | if (overlay_list != NULL) |
| 8274 | { |
| 8275 | overlay_list->os->update_dot = 1; |
| 8276 | overlay_list->os->update_dot_tree |
| 8277 | = exp_assign (".", exp_binop ('+', overlay_vma, overlay_max), FALSE); |
| 8278 | } |
| 8279 | |
| 8280 | l = overlay_list; |
| 8281 | while (l != NULL) |
| 8282 | { |
| 8283 | struct overlay_list *next; |
| 8284 | |
| 8285 | if (fill != NULL && l->os->fill == NULL) |
| 8286 | l->os->fill = fill; |
| 8287 | |
| 8288 | l->os->region = region; |
| 8289 | l->os->lma_region = lma_region; |
| 8290 | |
| 8291 | /* The first section has the load address specified in the |
| 8292 | OVERLAY statement. The rest are worked out from that. |
| 8293 | The base address is not needed (and should be null) if |
| 8294 | an LMA region was specified. */ |
| 8295 | if (l->next == 0) |
| 8296 | { |
| 8297 | l->os->load_base = lma_expr; |
| 8298 | l->os->sectype = first_overlay_section; |
| 8299 | } |
| 8300 | if (phdrs != NULL && l->os->phdrs == NULL) |
| 8301 | l->os->phdrs = phdrs; |
| 8302 | |
| 8303 | if (nocrossrefs) |
| 8304 | { |
| 8305 | lang_nocrossref_type *nc; |
| 8306 | |
| 8307 | nc = (lang_nocrossref_type *) xmalloc (sizeof *nc); |
| 8308 | nc->name = l->os->name; |
| 8309 | nc->next = nocrossref; |
| 8310 | nocrossref = nc; |
| 8311 | } |
| 8312 | |
| 8313 | next = l->next; |
| 8314 | free (l); |
| 8315 | l = next; |
| 8316 | } |
| 8317 | |
| 8318 | if (nocrossref != NULL) |
| 8319 | lang_add_nocrossref (nocrossref); |
| 8320 | |
| 8321 | overlay_vma = NULL; |
| 8322 | overlay_list = NULL; |
| 8323 | overlay_max = NULL; |
| 8324 | overlay_subalign = NULL; |
| 8325 | } |
| 8326 | \f |
| 8327 | /* Version handling. This is only useful for ELF. */ |
| 8328 | |
| 8329 | /* If PREV is NULL, return first version pattern matching particular symbol. |
| 8330 | If PREV is non-NULL, return first version pattern matching particular |
| 8331 | symbol after PREV (previously returned by lang_vers_match). */ |
| 8332 | |
| 8333 | static struct bfd_elf_version_expr * |
| 8334 | lang_vers_match (struct bfd_elf_version_expr_head *head, |
| 8335 | struct bfd_elf_version_expr *prev, |
| 8336 | const char *sym) |
| 8337 | { |
| 8338 | const char *c_sym; |
| 8339 | const char *cxx_sym = sym; |
| 8340 | const char *java_sym = sym; |
| 8341 | struct bfd_elf_version_expr *expr = NULL; |
| 8342 | enum demangling_styles curr_style; |
| 8343 | |
| 8344 | curr_style = CURRENT_DEMANGLING_STYLE; |
| 8345 | cplus_demangle_set_style (no_demangling); |
| 8346 | c_sym = bfd_demangle (link_info.output_bfd, sym, DMGL_NO_OPTS); |
| 8347 | if (!c_sym) |
| 8348 | c_sym = sym; |
| 8349 | cplus_demangle_set_style (curr_style); |
| 8350 | |
| 8351 | if (head->mask & BFD_ELF_VERSION_CXX_TYPE) |
| 8352 | { |
| 8353 | cxx_sym = bfd_demangle (link_info.output_bfd, sym, |
| 8354 | DMGL_PARAMS | DMGL_ANSI); |
| 8355 | if (!cxx_sym) |
| 8356 | cxx_sym = sym; |
| 8357 | } |
| 8358 | if (head->mask & BFD_ELF_VERSION_JAVA_TYPE) |
| 8359 | { |
| 8360 | java_sym = bfd_demangle (link_info.output_bfd, sym, DMGL_JAVA); |
| 8361 | if (!java_sym) |
| 8362 | java_sym = sym; |
| 8363 | } |
| 8364 | |
| 8365 | if (head->htab && (prev == NULL || prev->literal)) |
| 8366 | { |
| 8367 | struct bfd_elf_version_expr e; |
| 8368 | |
| 8369 | switch (prev ? prev->mask : 0) |
| 8370 | { |
| 8371 | case 0: |
| 8372 | if (head->mask & BFD_ELF_VERSION_C_TYPE) |
| 8373 | { |
| 8374 | e.pattern = c_sym; |
| 8375 | expr = (struct bfd_elf_version_expr *) |
| 8376 | htab_find ((htab_t) head->htab, &e); |
| 8377 | while (expr && strcmp (expr->pattern, c_sym) == 0) |
| 8378 | if (expr->mask == BFD_ELF_VERSION_C_TYPE) |
| 8379 | goto out_ret; |
| 8380 | else |
| 8381 | expr = expr->next; |
| 8382 | } |
| 8383 | /* Fallthrough */ |
| 8384 | case BFD_ELF_VERSION_C_TYPE: |
| 8385 | if (head->mask & BFD_ELF_VERSION_CXX_TYPE) |
| 8386 | { |
| 8387 | e.pattern = cxx_sym; |
| 8388 | expr = (struct bfd_elf_version_expr *) |
| 8389 | htab_find ((htab_t) head->htab, &e); |
| 8390 | while (expr && strcmp (expr->pattern, cxx_sym) == 0) |
| 8391 | if (expr->mask == BFD_ELF_VERSION_CXX_TYPE) |
| 8392 | goto out_ret; |
| 8393 | else |
| 8394 | expr = expr->next; |
| 8395 | } |
| 8396 | /* Fallthrough */ |
| 8397 | case BFD_ELF_VERSION_CXX_TYPE: |
| 8398 | if (head->mask & BFD_ELF_VERSION_JAVA_TYPE) |
| 8399 | { |
| 8400 | e.pattern = java_sym; |
| 8401 | expr = (struct bfd_elf_version_expr *) |
| 8402 | htab_find ((htab_t) head->htab, &e); |
| 8403 | while (expr && strcmp (expr->pattern, java_sym) == 0) |
| 8404 | if (expr->mask == BFD_ELF_VERSION_JAVA_TYPE) |
| 8405 | goto out_ret; |
| 8406 | else |
| 8407 | expr = expr->next; |
| 8408 | } |
| 8409 | /* Fallthrough */ |
| 8410 | default: |
| 8411 | break; |
| 8412 | } |
| 8413 | } |
| 8414 | |
| 8415 | /* Finally, try the wildcards. */ |
| 8416 | if (prev == NULL || prev->literal) |
| 8417 | expr = head->remaining; |
| 8418 | else |
| 8419 | expr = prev->next; |
| 8420 | for (; expr; expr = expr->next) |
| 8421 | { |
| 8422 | const char *s; |
| 8423 | |
| 8424 | if (!expr->pattern) |
| 8425 | continue; |
| 8426 | |
| 8427 | if (expr->pattern[0] == '*' && expr->pattern[1] == '\0') |
| 8428 | break; |
| 8429 | |
| 8430 | if (expr->mask == BFD_ELF_VERSION_JAVA_TYPE) |
| 8431 | s = java_sym; |
| 8432 | else if (expr->mask == BFD_ELF_VERSION_CXX_TYPE) |
| 8433 | s = cxx_sym; |
| 8434 | else |
| 8435 | s = c_sym; |
| 8436 | if (fnmatch (expr->pattern, s, 0) == 0) |
| 8437 | break; |
| 8438 | } |
| 8439 | |
| 8440 | out_ret: |
| 8441 | if (c_sym != sym) |
| 8442 | free ((char *) c_sym); |
| 8443 | if (cxx_sym != sym) |
| 8444 | free ((char *) cxx_sym); |
| 8445 | if (java_sym != sym) |
| 8446 | free ((char *) java_sym); |
| 8447 | return expr; |
| 8448 | } |
| 8449 | |
| 8450 | /* Return NULL if the PATTERN argument is a glob pattern, otherwise, |
| 8451 | return a pointer to the symbol name with any backslash quotes removed. */ |
| 8452 | |
| 8453 | static const char * |
| 8454 | realsymbol (const char *pattern) |
| 8455 | { |
| 8456 | const char *p; |
| 8457 | bfd_boolean changed = FALSE, backslash = FALSE; |
| 8458 | char *s, *symbol = (char *) xmalloc (strlen (pattern) + 1); |
| 8459 | |
| 8460 | for (p = pattern, s = symbol; *p != '\0'; ++p) |
| 8461 | { |
| 8462 | /* It is a glob pattern only if there is no preceding |
| 8463 | backslash. */ |
| 8464 | if (backslash) |
| 8465 | { |
| 8466 | /* Remove the preceding backslash. */ |
| 8467 | *(s - 1) = *p; |
| 8468 | backslash = FALSE; |
| 8469 | changed = TRUE; |
| 8470 | } |
| 8471 | else |
| 8472 | { |
| 8473 | if (*p == '?' || *p == '*' || *p == '[') |
| 8474 | { |
| 8475 | free (symbol); |
| 8476 | return NULL; |
| 8477 | } |
| 8478 | |
| 8479 | *s++ = *p; |
| 8480 | backslash = *p == '\\'; |
| 8481 | } |
| 8482 | } |
| 8483 | |
| 8484 | if (changed) |
| 8485 | { |
| 8486 | *s = '\0'; |
| 8487 | return symbol; |
| 8488 | } |
| 8489 | else |
| 8490 | { |
| 8491 | free (symbol); |
| 8492 | return pattern; |
| 8493 | } |
| 8494 | } |
| 8495 | |
| 8496 | /* This is called for each variable name or match expression. NEW_NAME is |
| 8497 | the name of the symbol to match, or, if LITERAL_P is FALSE, a glob |
| 8498 | pattern to be matched against symbol names. */ |
| 8499 | |
| 8500 | struct bfd_elf_version_expr * |
| 8501 | lang_new_vers_pattern (struct bfd_elf_version_expr *orig, |
| 8502 | const char *new_name, |
| 8503 | const char *lang, |
| 8504 | bfd_boolean literal_p) |
| 8505 | { |
| 8506 | struct bfd_elf_version_expr *ret; |
| 8507 | |
| 8508 | ret = (struct bfd_elf_version_expr *) xmalloc (sizeof *ret); |
| 8509 | ret->next = orig; |
| 8510 | ret->symver = 0; |
| 8511 | ret->script = 0; |
| 8512 | ret->literal = TRUE; |
| 8513 | ret->pattern = literal_p ? new_name : realsymbol (new_name); |
| 8514 | if (ret->pattern == NULL) |
| 8515 | { |
| 8516 | ret->pattern = new_name; |
| 8517 | ret->literal = FALSE; |
| 8518 | } |
| 8519 | |
| 8520 | if (lang == NULL || strcasecmp (lang, "C") == 0) |
| 8521 | ret->mask = BFD_ELF_VERSION_C_TYPE; |
| 8522 | else if (strcasecmp (lang, "C++") == 0) |
| 8523 | ret->mask = BFD_ELF_VERSION_CXX_TYPE; |
| 8524 | else if (strcasecmp (lang, "Java") == 0) |
| 8525 | ret->mask = BFD_ELF_VERSION_JAVA_TYPE; |
| 8526 | else |
| 8527 | { |
| 8528 | einfo (_("%X%P: unknown language `%s' in version information\n"), |
| 8529 | lang); |
| 8530 | ret->mask = BFD_ELF_VERSION_C_TYPE; |
| 8531 | } |
| 8532 | |
| 8533 | return ldemul_new_vers_pattern (ret); |
| 8534 | } |
| 8535 | |
| 8536 | /* This is called for each set of variable names and match |
| 8537 | expressions. */ |
| 8538 | |
| 8539 | struct bfd_elf_version_tree * |
| 8540 | lang_new_vers_node (struct bfd_elf_version_expr *globals, |
| 8541 | struct bfd_elf_version_expr *locals) |
| 8542 | { |
| 8543 | struct bfd_elf_version_tree *ret; |
| 8544 | |
| 8545 | ret = (struct bfd_elf_version_tree *) xcalloc (1, sizeof *ret); |
| 8546 | ret->globals.list = globals; |
| 8547 | ret->locals.list = locals; |
| 8548 | ret->match = lang_vers_match; |
| 8549 | ret->name_indx = (unsigned int) -1; |
| 8550 | return ret; |
| 8551 | } |
| 8552 | |
| 8553 | /* This static variable keeps track of version indices. */ |
| 8554 | |
| 8555 | static int version_index; |
| 8556 | |
| 8557 | static hashval_t |
| 8558 | version_expr_head_hash (const void *p) |
| 8559 | { |
| 8560 | const struct bfd_elf_version_expr *e = |
| 8561 | (const struct bfd_elf_version_expr *) p; |
| 8562 | |
| 8563 | return htab_hash_string (e->pattern); |
| 8564 | } |
| 8565 | |
| 8566 | static int |
| 8567 | version_expr_head_eq (const void *p1, const void *p2) |
| 8568 | { |
| 8569 | const struct bfd_elf_version_expr *e1 = |
| 8570 | (const struct bfd_elf_version_expr *) p1; |
| 8571 | const struct bfd_elf_version_expr *e2 = |
| 8572 | (const struct bfd_elf_version_expr *) p2; |
| 8573 | |
| 8574 | return strcmp (e1->pattern, e2->pattern) == 0; |
| 8575 | } |
| 8576 | |
| 8577 | static void |
| 8578 | lang_finalize_version_expr_head (struct bfd_elf_version_expr_head *head) |
| 8579 | { |
| 8580 | size_t count = 0; |
| 8581 | struct bfd_elf_version_expr *e, *next; |
| 8582 | struct bfd_elf_version_expr **list_loc, **remaining_loc; |
| 8583 | |
| 8584 | for (e = head->list; e; e = e->next) |
| 8585 | { |
| 8586 | if (e->literal) |
| 8587 | count++; |
| 8588 | head->mask |= e->mask; |
| 8589 | } |
| 8590 | |
| 8591 | if (count) |
| 8592 | { |
| 8593 | head->htab = htab_create (count * 2, version_expr_head_hash, |
| 8594 | version_expr_head_eq, NULL); |
| 8595 | list_loc = &head->list; |
| 8596 | remaining_loc = &head->remaining; |
| 8597 | for (e = head->list; e; e = next) |
| 8598 | { |
| 8599 | next = e->next; |
| 8600 | if (!e->literal) |
| 8601 | { |
| 8602 | *remaining_loc = e; |
| 8603 | remaining_loc = &e->next; |
| 8604 | } |
| 8605 | else |
| 8606 | { |
| 8607 | void **loc = htab_find_slot ((htab_t) head->htab, e, INSERT); |
| 8608 | |
| 8609 | if (*loc) |
| 8610 | { |
| 8611 | struct bfd_elf_version_expr *e1, *last; |
| 8612 | |
| 8613 | e1 = (struct bfd_elf_version_expr *) *loc; |
| 8614 | last = NULL; |
| 8615 | do |
| 8616 | { |
| 8617 | if (e1->mask == e->mask) |
| 8618 | { |
| 8619 | last = NULL; |
| 8620 | break; |
| 8621 | } |
| 8622 | last = e1; |
| 8623 | e1 = e1->next; |
| 8624 | } |
| 8625 | while (e1 && strcmp (e1->pattern, e->pattern) == 0); |
| 8626 | |
| 8627 | if (last == NULL) |
| 8628 | { |
| 8629 | /* This is a duplicate. */ |
| 8630 | /* FIXME: Memory leak. Sometimes pattern is not |
| 8631 | xmalloced alone, but in larger chunk of memory. */ |
| 8632 | /* free (e->pattern); */ |
| 8633 | free (e); |
| 8634 | } |
| 8635 | else |
| 8636 | { |
| 8637 | e->next = last->next; |
| 8638 | last->next = e; |
| 8639 | } |
| 8640 | } |
| 8641 | else |
| 8642 | { |
| 8643 | *loc = e; |
| 8644 | *list_loc = e; |
| 8645 | list_loc = &e->next; |
| 8646 | } |
| 8647 | } |
| 8648 | } |
| 8649 | *remaining_loc = NULL; |
| 8650 | *list_loc = head->remaining; |
| 8651 | } |
| 8652 | else |
| 8653 | head->remaining = head->list; |
| 8654 | } |
| 8655 | |
| 8656 | /* This is called when we know the name and dependencies of the |
| 8657 | version. */ |
| 8658 | |
| 8659 | void |
| 8660 | lang_register_vers_node (const char *name, |
| 8661 | struct bfd_elf_version_tree *version, |
| 8662 | struct bfd_elf_version_deps *deps) |
| 8663 | { |
| 8664 | struct bfd_elf_version_tree *t, **pp; |
| 8665 | struct bfd_elf_version_expr *e1; |
| 8666 | |
| 8667 | if (name == NULL) |
| 8668 | name = ""; |
| 8669 | |
| 8670 | if (link_info.version_info != NULL |
| 8671 | && (name[0] == '\0' || link_info.version_info->name[0] == '\0')) |
| 8672 | { |
| 8673 | einfo (_("%X%P: anonymous version tag cannot be combined" |
| 8674 | " with other version tags\n")); |
| 8675 | free (version); |
| 8676 | return; |
| 8677 | } |
| 8678 | |
| 8679 | /* Make sure this node has a unique name. */ |
| 8680 | for (t = link_info.version_info; t != NULL; t = t->next) |
| 8681 | if (strcmp (t->name, name) == 0) |
| 8682 | einfo (_("%X%P: duplicate version tag `%s'\n"), name); |
| 8683 | |
| 8684 | lang_finalize_version_expr_head (&version->globals); |
| 8685 | lang_finalize_version_expr_head (&version->locals); |
| 8686 | |
| 8687 | /* Check the global and local match names, and make sure there |
| 8688 | aren't any duplicates. */ |
| 8689 | |
| 8690 | for (e1 = version->globals.list; e1 != NULL; e1 = e1->next) |
| 8691 | { |
| 8692 | for (t = link_info.version_info; t != NULL; t = t->next) |
| 8693 | { |
| 8694 | struct bfd_elf_version_expr *e2; |
| 8695 | |
| 8696 | if (t->locals.htab && e1->literal) |
| 8697 | { |
| 8698 | e2 = (struct bfd_elf_version_expr *) |
| 8699 | htab_find ((htab_t) t->locals.htab, e1); |
| 8700 | while (e2 && strcmp (e1->pattern, e2->pattern) == 0) |
| 8701 | { |
| 8702 | if (e1->mask == e2->mask) |
| 8703 | einfo (_("%X%P: duplicate expression `%s'" |
| 8704 | " in version information\n"), e1->pattern); |
| 8705 | e2 = e2->next; |
| 8706 | } |
| 8707 | } |
| 8708 | else if (!e1->literal) |
| 8709 | for (e2 = t->locals.remaining; e2 != NULL; e2 = e2->next) |
| 8710 | if (strcmp (e1->pattern, e2->pattern) == 0 |
| 8711 | && e1->mask == e2->mask) |
| 8712 | einfo (_("%X%P: duplicate expression `%s'" |
| 8713 | " in version information\n"), e1->pattern); |
| 8714 | } |
| 8715 | } |
| 8716 | |
| 8717 | for (e1 = version->locals.list; e1 != NULL; e1 = e1->next) |
| 8718 | { |
| 8719 | for (t = link_info.version_info; t != NULL; t = t->next) |
| 8720 | { |
| 8721 | struct bfd_elf_version_expr *e2; |
| 8722 | |
| 8723 | if (t->globals.htab && e1->literal) |
| 8724 | { |
| 8725 | e2 = (struct bfd_elf_version_expr *) |
| 8726 | htab_find ((htab_t) t->globals.htab, e1); |
| 8727 | while (e2 && strcmp (e1->pattern, e2->pattern) == 0) |
| 8728 | { |
| 8729 | if (e1->mask == e2->mask) |
| 8730 | einfo (_("%X%P: duplicate expression `%s'" |
| 8731 | " in version information\n"), |
| 8732 | e1->pattern); |
| 8733 | e2 = e2->next; |
| 8734 | } |
| 8735 | } |
| 8736 | else if (!e1->literal) |
| 8737 | for (e2 = t->globals.remaining; e2 != NULL; e2 = e2->next) |
| 8738 | if (strcmp (e1->pattern, e2->pattern) == 0 |
| 8739 | && e1->mask == e2->mask) |
| 8740 | einfo (_("%X%P: duplicate expression `%s'" |
| 8741 | " in version information\n"), e1->pattern); |
| 8742 | } |
| 8743 | } |
| 8744 | |
| 8745 | version->deps = deps; |
| 8746 | version->name = name; |
| 8747 | if (name[0] != '\0') |
| 8748 | { |
| 8749 | ++version_index; |
| 8750 | version->vernum = version_index; |
| 8751 | } |
| 8752 | else |
| 8753 | version->vernum = 0; |
| 8754 | |
| 8755 | for (pp = &link_info.version_info; *pp != NULL; pp = &(*pp)->next) |
| 8756 | ; |
| 8757 | *pp = version; |
| 8758 | } |
| 8759 | |
| 8760 | /* This is called when we see a version dependency. */ |
| 8761 | |
| 8762 | struct bfd_elf_version_deps * |
| 8763 | lang_add_vers_depend (struct bfd_elf_version_deps *list, const char *name) |
| 8764 | { |
| 8765 | struct bfd_elf_version_deps *ret; |
| 8766 | struct bfd_elf_version_tree *t; |
| 8767 | |
| 8768 | ret = (struct bfd_elf_version_deps *) xmalloc (sizeof *ret); |
| 8769 | ret->next = list; |
| 8770 | |
| 8771 | for (t = link_info.version_info; t != NULL; t = t->next) |
| 8772 | { |
| 8773 | if (strcmp (t->name, name) == 0) |
| 8774 | { |
| 8775 | ret->version_needed = t; |
| 8776 | return ret; |
| 8777 | } |
| 8778 | } |
| 8779 | |
| 8780 | einfo (_("%X%P: unable to find version dependency `%s'\n"), name); |
| 8781 | |
| 8782 | ret->version_needed = NULL; |
| 8783 | return ret; |
| 8784 | } |
| 8785 | |
| 8786 | static void |
| 8787 | lang_do_version_exports_section (void) |
| 8788 | { |
| 8789 | struct bfd_elf_version_expr *greg = NULL, *lreg; |
| 8790 | |
| 8791 | LANG_FOR_EACH_INPUT_STATEMENT (is) |
| 8792 | { |
| 8793 | asection *sec = bfd_get_section_by_name (is->the_bfd, ".exports"); |
| 8794 | char *contents, *p; |
| 8795 | bfd_size_type len; |
| 8796 | |
| 8797 | if (sec == NULL) |
| 8798 | continue; |
| 8799 | |
| 8800 | len = sec->size; |
| 8801 | contents = (char *) xmalloc (len); |
| 8802 | if (!bfd_get_section_contents (is->the_bfd, sec, contents, 0, len)) |
| 8803 | einfo (_("%X%P: unable to read .exports section contents\n"), sec); |
| 8804 | |
| 8805 | p = contents; |
| 8806 | while (p < contents + len) |
| 8807 | { |
| 8808 | greg = lang_new_vers_pattern (greg, p, NULL, FALSE); |
| 8809 | p = strchr (p, '\0') + 1; |
| 8810 | } |
| 8811 | |
| 8812 | /* Do not free the contents, as we used them creating the regex. */ |
| 8813 | |
| 8814 | /* Do not include this section in the link. */ |
| 8815 | sec->flags |= SEC_EXCLUDE | SEC_KEEP; |
| 8816 | } |
| 8817 | |
| 8818 | lreg = lang_new_vers_pattern (NULL, "*", NULL, FALSE); |
| 8819 | lang_register_vers_node (command_line.version_exports_section, |
| 8820 | lang_new_vers_node (greg, lreg), NULL); |
| 8821 | } |
| 8822 | |
| 8823 | /* Evaluate LENGTH and ORIGIN parts of MEMORY spec */ |
| 8824 | |
| 8825 | static void |
| 8826 | lang_do_memory_regions (void) |
| 8827 | { |
| 8828 | lang_memory_region_type *r = lang_memory_region_list; |
| 8829 | |
| 8830 | for (; r != NULL; r = r->next) |
| 8831 | { |
| 8832 | if (r->origin_exp) |
| 8833 | { |
| 8834 | exp_fold_tree_no_dot (r->origin_exp); |
| 8835 | if (expld.result.valid_p) |
| 8836 | { |
| 8837 | r->origin = expld.result.value; |
| 8838 | r->current = r->origin; |
| 8839 | } |
| 8840 | else |
| 8841 | einfo (_("%F%P: invalid origin for memory region %s\n"), |
| 8842 | r->name_list.name); |
| 8843 | } |
| 8844 | if (r->length_exp) |
| 8845 | { |
| 8846 | exp_fold_tree_no_dot (r->length_exp); |
| 8847 | if (expld.result.valid_p) |
| 8848 | r->length = expld.result.value; |
| 8849 | else |
| 8850 | einfo (_("%F%P: invalid length for memory region %s\n"), |
| 8851 | r->name_list.name); |
| 8852 | } |
| 8853 | } |
| 8854 | } |
| 8855 | |
| 8856 | void |
| 8857 | lang_add_unique (const char *name) |
| 8858 | { |
| 8859 | struct unique_sections *ent; |
| 8860 | |
| 8861 | for (ent = unique_section_list; ent; ent = ent->next) |
| 8862 | if (strcmp (ent->name, name) == 0) |
| 8863 | return; |
| 8864 | |
| 8865 | ent = (struct unique_sections *) xmalloc (sizeof *ent); |
| 8866 | ent->name = xstrdup (name); |
| 8867 | ent->next = unique_section_list; |
| 8868 | unique_section_list = ent; |
| 8869 | } |
| 8870 | |
| 8871 | /* Append the list of dynamic symbols to the existing one. */ |
| 8872 | |
| 8873 | void |
| 8874 | lang_append_dynamic_list (struct bfd_elf_version_expr *dynamic) |
| 8875 | { |
| 8876 | if (link_info.dynamic_list) |
| 8877 | { |
| 8878 | struct bfd_elf_version_expr *tail; |
| 8879 | for (tail = dynamic; tail->next != NULL; tail = tail->next) |
| 8880 | ; |
| 8881 | tail->next = link_info.dynamic_list->head.list; |
| 8882 | link_info.dynamic_list->head.list = dynamic; |
| 8883 | } |
| 8884 | else |
| 8885 | { |
| 8886 | struct bfd_elf_dynamic_list *d; |
| 8887 | |
| 8888 | d = (struct bfd_elf_dynamic_list *) xcalloc (1, sizeof *d); |
| 8889 | d->head.list = dynamic; |
| 8890 | d->match = lang_vers_match; |
| 8891 | link_info.dynamic_list = d; |
| 8892 | } |
| 8893 | } |
| 8894 | |
| 8895 | /* Append the list of C++ typeinfo dynamic symbols to the existing |
| 8896 | one. */ |
| 8897 | |
| 8898 | void |
| 8899 | lang_append_dynamic_list_cpp_typeinfo (void) |
| 8900 | { |
| 8901 | const char *symbols[] = |
| 8902 | { |
| 8903 | "typeinfo name for*", |
| 8904 | "typeinfo for*" |
| 8905 | }; |
| 8906 | struct bfd_elf_version_expr *dynamic = NULL; |
| 8907 | unsigned int i; |
| 8908 | |
| 8909 | for (i = 0; i < ARRAY_SIZE (symbols); i++) |
| 8910 | dynamic = lang_new_vers_pattern (dynamic, symbols [i], "C++", |
| 8911 | FALSE); |
| 8912 | |
| 8913 | lang_append_dynamic_list (dynamic); |
| 8914 | } |
| 8915 | |
| 8916 | /* Append the list of C++ operator new and delete dynamic symbols to the |
| 8917 | existing one. */ |
| 8918 | |
| 8919 | void |
| 8920 | lang_append_dynamic_list_cpp_new (void) |
| 8921 | { |
| 8922 | const char *symbols[] = |
| 8923 | { |
| 8924 | "operator new*", |
| 8925 | "operator delete*" |
| 8926 | }; |
| 8927 | struct bfd_elf_version_expr *dynamic = NULL; |
| 8928 | unsigned int i; |
| 8929 | |
| 8930 | for (i = 0; i < ARRAY_SIZE (symbols); i++) |
| 8931 | dynamic = lang_new_vers_pattern (dynamic, symbols [i], "C++", |
| 8932 | FALSE); |
| 8933 | |
| 8934 | lang_append_dynamic_list (dynamic); |
| 8935 | } |
| 8936 | |
| 8937 | /* Scan a space and/or comma separated string of features. */ |
| 8938 | |
| 8939 | void |
| 8940 | lang_ld_feature (char *str) |
| 8941 | { |
| 8942 | char *p, *q; |
| 8943 | |
| 8944 | p = str; |
| 8945 | while (*p) |
| 8946 | { |
| 8947 | char sep; |
| 8948 | while (*p == ',' || ISSPACE (*p)) |
| 8949 | ++p; |
| 8950 | if (!*p) |
| 8951 | break; |
| 8952 | q = p + 1; |
| 8953 | while (*q && *q != ',' && !ISSPACE (*q)) |
| 8954 | ++q; |
| 8955 | sep = *q; |
| 8956 | *q = 0; |
| 8957 | if (strcasecmp (p, "SANE_EXPR") == 0) |
| 8958 | config.sane_expr = TRUE; |
| 8959 | else |
| 8960 | einfo (_("%X%P: unknown feature `%s'\n"), p); |
| 8961 | *q = sep; |
| 8962 | p = q; |
| 8963 | } |
| 8964 | } |
| 8965 | |
| 8966 | /* Pretty print memory amount. */ |
| 8967 | |
| 8968 | static void |
| 8969 | lang_print_memory_size (bfd_vma sz) |
| 8970 | { |
| 8971 | if ((sz & 0x3fffffff) == 0) |
| 8972 | printf ("%10" BFD_VMA_FMT "u GB", sz >> 30); |
| 8973 | else if ((sz & 0xfffff) == 0) |
| 8974 | printf ("%10" BFD_VMA_FMT "u MB", sz >> 20); |
| 8975 | else if ((sz & 0x3ff) == 0) |
| 8976 | printf ("%10" BFD_VMA_FMT "u KB", sz >> 10); |
| 8977 | else |
| 8978 | printf (" %10" BFD_VMA_FMT "u B", sz); |
| 8979 | } |
| 8980 | |
| 8981 | /* Implement --print-memory-usage: disply per region memory usage. */ |
| 8982 | |
| 8983 | void |
| 8984 | lang_print_memory_usage (void) |
| 8985 | { |
| 8986 | lang_memory_region_type *r; |
| 8987 | |
| 8988 | printf ("Memory region Used Size Region Size %%age Used\n"); |
| 8989 | for (r = lang_memory_region_list; r->next != NULL; r = r->next) |
| 8990 | { |
| 8991 | bfd_vma used_length = r->current - r->origin; |
| 8992 | double percent; |
| 8993 | |
| 8994 | printf ("%16s: ",r->name_list.name); |
| 8995 | lang_print_memory_size (used_length); |
| 8996 | lang_print_memory_size ((bfd_vma) r->length); |
| 8997 | |
| 8998 | percent = used_length * 100.0 / r->length; |
| 8999 | |
| 9000 | printf (" %6.2f%%\n", percent); |
| 9001 | } |
| 9002 | } |