| 1 | # This shell script emits a C file. -*- C -*- |
| 2 | # Copyright (C) 1991-2020 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 | |
| 22 | # This file is sourced from elf.em, and defines extra arm-elf |
| 23 | # specific routines. |
| 24 | # |
| 25 | test -z "$TARGET2_TYPE" && TARGET2_TYPE="rel" |
| 26 | fragment <<EOF |
| 27 | |
| 28 | #include "ldctor.h" |
| 29 | #include "elf/arm.h" |
| 30 | #include "elf32-arm.h" |
| 31 | |
| 32 | static struct elf32_arm_params params = |
| 33 | { |
| 34 | NULL, /* thumb_entry_symbol */ |
| 35 | 0, /* byteswap_code */ |
| 36 | 0${TARGET1_IS_REL}, /* target1_is_rel */ |
| 37 | "${TARGET2_TYPE}", /* target2_type */ |
| 38 | 0, /* fix_v4bx */ |
| 39 | 0, /* use_blx */ |
| 40 | BFD_ARM_VFP11_FIX_DEFAULT, /* vfp11_denorm_fix */ |
| 41 | BFD_ARM_STM32L4XX_FIX_NONE, /* stm32l4xx_fix */ |
| 42 | 0, /* no_enum_size_warning */ |
| 43 | 0, /* no_wchar_size_warning */ |
| 44 | 0, /* pic_veneer */ |
| 45 | -1, /* fix_cortex_a8 */ |
| 46 | 1, /* fix_arm1176 */ |
| 47 | -1, /* merge_exidx_entries */ |
| 48 | 0, /* cmse_implib */ |
| 49 | NULL /* in_implib_bfd */ |
| 50 | }; |
| 51 | static char *in_implib_filename = NULL; |
| 52 | |
| 53 | static void |
| 54 | gld${EMULATION_NAME}_before_parse (void) |
| 55 | { |
| 56 | #ifndef TARGET_ /* I.e., if not generic. */ |
| 57 | ldfile_set_output_arch ("`echo ${ARCH}`", bfd_arch_unknown); |
| 58 | #endif /* not TARGET_ */ |
| 59 | input_flags.dynamic = ${DYNAMIC_LINK-TRUE}; |
| 60 | config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo TRUE ; else echo FALSE ; fi`; |
| 61 | config.separate_code = `if test "x${SEPARATE_CODE}" = xyes ; then echo TRUE ; else echo FALSE ; fi`; |
| 62 | link_info.check_relocs_after_open_input = TRUE; |
| 63 | link_info.relro = DEFAULT_LD_Z_RELRO; |
| 64 | } |
| 65 | |
| 66 | static void |
| 67 | gld${EMULATION_NAME}_set_symbols (void) |
| 68 | { |
| 69 | /* PR 19106: The section resizing code in gldarmelf_after_allocation |
| 70 | is effectively the same as relaxation, so prevent early memory |
| 71 | region checks which produce bogus error messages. |
| 72 | Note - this test has nothing to do with symbols. It is just here |
| 73 | because this is the first emulation routine that is called after |
| 74 | the command line has been parsed. */ |
| 75 | if (!bfd_link_relocatable (&link_info)) |
| 76 | TARGET_ENABLE_RELAXATION; |
| 77 | } |
| 78 | |
| 79 | static void |
| 80 | arm_elf_before_allocation (void) |
| 81 | { |
| 82 | bfd_elf32_arm_set_byteswap_code (&link_info, params.byteswap_code); |
| 83 | |
| 84 | /* Choose type of VFP11 erratum fix, or warn if specified fix is unnecessary |
| 85 | due to architecture version. */ |
| 86 | bfd_elf32_arm_set_vfp11_fix (link_info.output_bfd, &link_info); |
| 87 | |
| 88 | /* Choose type of STM32L4XX erratum fix, or warn if specified fix is |
| 89 | unnecessary due to architecture version. */ |
| 90 | bfd_elf32_arm_set_stm32l4xx_fix (link_info.output_bfd, &link_info); |
| 91 | |
| 92 | /* Auto-select Cortex-A8 erratum fix if it wasn't explicitly specified. */ |
| 93 | bfd_elf32_arm_set_cortex_a8_fix (link_info.output_bfd, &link_info); |
| 94 | |
| 95 | /* Ensure the output sections of veneers needing a dedicated one is not |
| 96 | removed. */ |
| 97 | bfd_elf32_arm_keep_private_stub_output_sections (&link_info); |
| 98 | |
| 99 | /* We should be able to set the size of the interworking stub section. We |
| 100 | can't do it until later if we have dynamic sections, though. */ |
| 101 | if (elf_hash_table (&link_info)->dynobj == NULL) |
| 102 | { |
| 103 | /* Here we rummage through the found bfds to collect glue information. */ |
| 104 | LANG_FOR_EACH_INPUT_STATEMENT (is) |
| 105 | { |
| 106 | /* Initialise mapping tables for code/data. */ |
| 107 | bfd_elf32_arm_init_maps (is->the_bfd); |
| 108 | |
| 109 | if (!bfd_elf32_arm_process_before_allocation (is->the_bfd, |
| 110 | &link_info) |
| 111 | || !bfd_elf32_arm_vfp11_erratum_scan (is->the_bfd, &link_info) |
| 112 | || !bfd_elf32_arm_stm32l4xx_erratum_scan (is->the_bfd, |
| 113 | &link_info)) |
| 114 | /* xgettext:c-format */ |
| 115 | einfo (_("%P: errors encountered processing file %s\n"), |
| 116 | is->filename); |
| 117 | } |
| 118 | |
| 119 | /* We have seen it all. Allocate it, and carry on. */ |
| 120 | bfd_elf32_arm_allocate_interworking_sections (& link_info); |
| 121 | } |
| 122 | |
| 123 | /* Call the standard elf routine. */ |
| 124 | gld${EMULATION_NAME}_before_allocation (); |
| 125 | } |
| 126 | |
| 127 | /* Fake input file for stubs. */ |
| 128 | static lang_input_statement_type *stub_file; |
| 129 | |
| 130 | /* Whether we need to call gldarm_layout_sections_again. */ |
| 131 | static int need_laying_out = 0; |
| 132 | |
| 133 | /* Maximum size of a group of input sections that can be handled by |
| 134 | one stub section. A value of +/-1 indicates the bfd back-end |
| 135 | should use a suitable default size. */ |
| 136 | static bfd_signed_vma group_size = 1; |
| 137 | |
| 138 | struct hook_stub_info |
| 139 | { |
| 140 | lang_statement_list_type add; |
| 141 | asection *input_section; |
| 142 | }; |
| 143 | |
| 144 | /* Traverse the linker tree to find the spot where the stub goes. */ |
| 145 | |
| 146 | static bfd_boolean |
| 147 | hook_in_stub (struct hook_stub_info *info, lang_statement_union_type **lp) |
| 148 | { |
| 149 | lang_statement_union_type *l; |
| 150 | bfd_boolean ret; |
| 151 | |
| 152 | for (; (l = *lp) != NULL; lp = &l->header.next) |
| 153 | { |
| 154 | switch (l->header.type) |
| 155 | { |
| 156 | case lang_constructors_statement_enum: |
| 157 | ret = hook_in_stub (info, &constructor_list.head); |
| 158 | if (ret) |
| 159 | return ret; |
| 160 | break; |
| 161 | |
| 162 | case lang_output_section_statement_enum: |
| 163 | ret = hook_in_stub (info, |
| 164 | &l->output_section_statement.children.head); |
| 165 | if (ret) |
| 166 | return ret; |
| 167 | break; |
| 168 | |
| 169 | case lang_wild_statement_enum: |
| 170 | ret = hook_in_stub (info, &l->wild_statement.children.head); |
| 171 | if (ret) |
| 172 | return ret; |
| 173 | break; |
| 174 | |
| 175 | case lang_group_statement_enum: |
| 176 | ret = hook_in_stub (info, &l->group_statement.children.head); |
| 177 | if (ret) |
| 178 | return ret; |
| 179 | break; |
| 180 | |
| 181 | case lang_input_section_enum: |
| 182 | if (l->input_section.section == info->input_section) |
| 183 | { |
| 184 | /* We've found our section. Insert the stub immediately |
| 185 | after its associated input section. */ |
| 186 | *(info->add.tail) = l->header.next; |
| 187 | l->header.next = info->add.head; |
| 188 | return TRUE; |
| 189 | } |
| 190 | break; |
| 191 | |
| 192 | case lang_data_statement_enum: |
| 193 | case lang_reloc_statement_enum: |
| 194 | case lang_object_symbols_statement_enum: |
| 195 | case lang_output_statement_enum: |
| 196 | case lang_target_statement_enum: |
| 197 | case lang_input_statement_enum: |
| 198 | case lang_assignment_statement_enum: |
| 199 | case lang_padding_statement_enum: |
| 200 | case lang_address_statement_enum: |
| 201 | case lang_fill_statement_enum: |
| 202 | break; |
| 203 | |
| 204 | default: |
| 205 | FAIL (); |
| 206 | break; |
| 207 | } |
| 208 | } |
| 209 | return FALSE; |
| 210 | } |
| 211 | |
| 212 | |
| 213 | /* Call-back for elf32_arm_size_stubs. */ |
| 214 | |
| 215 | /* Create a new stub section, and arrange for it to be linked |
| 216 | immediately after INPUT_SECTION. */ |
| 217 | |
| 218 | static asection * |
| 219 | elf32_arm_add_stub_section (const char * stub_sec_name, |
| 220 | asection * output_section, |
| 221 | asection * after_input_section, |
| 222 | unsigned int alignment_power) |
| 223 | { |
| 224 | asection *stub_sec; |
| 225 | flagword flags; |
| 226 | lang_output_section_statement_type *os; |
| 227 | struct hook_stub_info info; |
| 228 | |
| 229 | flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE |
| 230 | | SEC_HAS_CONTENTS | SEC_RELOC | SEC_IN_MEMORY | SEC_KEEP |
| 231 | | SEC_LINKER_CREATED); |
| 232 | stub_sec = bfd_make_section_anyway_with_flags (stub_file->the_bfd, |
| 233 | stub_sec_name, flags); |
| 234 | if (stub_sec == NULL) |
| 235 | goto err_ret; |
| 236 | |
| 237 | bfd_set_section_alignment (stub_sec, alignment_power); |
| 238 | |
| 239 | os = lang_output_section_get (output_section); |
| 240 | |
| 241 | info.input_section = after_input_section; |
| 242 | lang_list_init (&info.add); |
| 243 | lang_add_section (&info.add, stub_sec, NULL, os); |
| 244 | |
| 245 | if (info.add.head == NULL) |
| 246 | goto err_ret; |
| 247 | |
| 248 | if (after_input_section == NULL) |
| 249 | { |
| 250 | lang_statement_union_type **lp = &os->children.head; |
| 251 | lang_statement_union_type *l, *lprev = NULL; |
| 252 | |
| 253 | for (; (l = *lp) != NULL; lp = &l->header.next, lprev = l); |
| 254 | |
| 255 | if (lprev) |
| 256 | lprev->header.next = info.add.head; |
| 257 | else |
| 258 | os->children.head = info.add.head; |
| 259 | |
| 260 | return stub_sec; |
| 261 | } |
| 262 | else |
| 263 | { |
| 264 | if (hook_in_stub (&info, &os->children.head)) |
| 265 | return stub_sec; |
| 266 | } |
| 267 | |
| 268 | err_ret: |
| 269 | einfo (_("%X%P: can not make stub section: %E\n")); |
| 270 | return NULL; |
| 271 | } |
| 272 | |
| 273 | /* Another call-back for elf_arm_size_stubs. */ |
| 274 | |
| 275 | static void |
| 276 | gldarm_layout_sections_again (void) |
| 277 | { |
| 278 | /* If we have changed sizes of the stub sections, then we need |
| 279 | to recalculate all the section offsets. This may mean we need to |
| 280 | add even more stubs. */ |
| 281 | ldelf_map_segments (TRUE); |
| 282 | need_laying_out = -1; |
| 283 | } |
| 284 | |
| 285 | static void |
| 286 | build_section_lists (lang_statement_union_type *statement) |
| 287 | { |
| 288 | if (statement->header.type == lang_input_section_enum) |
| 289 | { |
| 290 | asection *i = statement->input_section.section; |
| 291 | |
| 292 | if (i->sec_info_type != SEC_INFO_TYPE_JUST_SYMS |
| 293 | && (i->flags & SEC_EXCLUDE) == 0 |
| 294 | && i->output_section != NULL |
| 295 | && i->output_section->owner == link_info.output_bfd) |
| 296 | elf32_arm_next_input_section (& link_info, i); |
| 297 | } |
| 298 | } |
| 299 | |
| 300 | static int |
| 301 | compare_output_sec_vma (const void *a, const void *b) |
| 302 | { |
| 303 | asection *asec = *(asection **) a, *bsec = *(asection **) b; |
| 304 | asection *aout = asec->output_section, *bout = bsec->output_section; |
| 305 | bfd_vma avma, bvma; |
| 306 | |
| 307 | /* If there's no output section for some reason, compare equal. */ |
| 308 | if (!aout || !bout) |
| 309 | return 0; |
| 310 | |
| 311 | avma = aout->vma + asec->output_offset; |
| 312 | bvma = bout->vma + bsec->output_offset; |
| 313 | |
| 314 | if (avma > bvma) |
| 315 | return 1; |
| 316 | else if (avma < bvma) |
| 317 | return -1; |
| 318 | |
| 319 | return 0; |
| 320 | } |
| 321 | |
| 322 | static void |
| 323 | gld${EMULATION_NAME}_after_allocation (void) |
| 324 | { |
| 325 | int ret; |
| 326 | |
| 327 | /* Build a sorted list of input text sections, then use that to process |
| 328 | the unwind table index. */ |
| 329 | unsigned int list_size = 10; |
| 330 | asection **sec_list = (asection **) |
| 331 | xmalloc (list_size * sizeof (asection *)); |
| 332 | unsigned int sec_count = 0; |
| 333 | |
| 334 | LANG_FOR_EACH_INPUT_STATEMENT (is) |
| 335 | { |
| 336 | bfd *abfd = is->the_bfd; |
| 337 | asection *sec; |
| 338 | |
| 339 | if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0) |
| 340 | continue; |
| 341 | |
| 342 | for (sec = abfd->sections; sec != NULL; sec = sec->next) |
| 343 | { |
| 344 | asection *out_sec = sec->output_section; |
| 345 | |
| 346 | if (out_sec |
| 347 | && elf_section_data (sec) |
| 348 | && elf_section_type (sec) == SHT_PROGBITS |
| 349 | && (elf_section_flags (sec) & SHF_EXECINSTR) != 0 |
| 350 | && (sec->flags & SEC_EXCLUDE) == 0 |
| 351 | && sec->sec_info_type != SEC_INFO_TYPE_JUST_SYMS |
| 352 | && out_sec != bfd_abs_section_ptr) |
| 353 | { |
| 354 | if (sec_count == list_size) |
| 355 | { |
| 356 | list_size *= 2; |
| 357 | sec_list = (asection **) |
| 358 | xrealloc (sec_list, list_size * sizeof (asection *)); |
| 359 | } |
| 360 | |
| 361 | sec_list[sec_count++] = sec; |
| 362 | } |
| 363 | } |
| 364 | } |
| 365 | |
| 366 | qsort (sec_list, sec_count, sizeof (asection *), &compare_output_sec_vma); |
| 367 | |
| 368 | if (elf32_arm_fix_exidx_coverage (sec_list, sec_count, &link_info, |
| 369 | params.merge_exidx_entries)) |
| 370 | need_laying_out = 1; |
| 371 | |
| 372 | free (sec_list); |
| 373 | |
| 374 | /* bfd_elf32_discard_info just plays with debugging sections, |
| 375 | ie. doesn't affect any code, so we can delay resizing the |
| 376 | sections. It's likely we'll resize everything in the process of |
| 377 | adding stubs. */ |
| 378 | ret = bfd_elf_discard_info (link_info.output_bfd, & link_info); |
| 379 | if (ret < 0) |
| 380 | { |
| 381 | einfo (_("%X%P: .eh_frame/.stab edit: %E\n")); |
| 382 | return; |
| 383 | } |
| 384 | else if (ret > 0) |
| 385 | need_laying_out = 1; |
| 386 | |
| 387 | /* If generating a relocatable output file, then we don't |
| 388 | have to examine the relocs. */ |
| 389 | if (stub_file != NULL && !bfd_link_relocatable (&link_info)) |
| 390 | { |
| 391 | ret = elf32_arm_setup_section_lists (link_info.output_bfd, &link_info); |
| 392 | if (ret != 0) |
| 393 | { |
| 394 | if (ret < 0) |
| 395 | { |
| 396 | einfo (_("%X%P: could not compute sections lists " |
| 397 | "for stub generation: %E\n")); |
| 398 | return; |
| 399 | } |
| 400 | |
| 401 | lang_for_each_statement (build_section_lists); |
| 402 | |
| 403 | /* Call into the BFD backend to do the real work. */ |
| 404 | if (! elf32_arm_size_stubs (link_info.output_bfd, |
| 405 | stub_file->the_bfd, |
| 406 | & link_info, |
| 407 | group_size, |
| 408 | & elf32_arm_add_stub_section, |
| 409 | & gldarm_layout_sections_again)) |
| 410 | { |
| 411 | einfo (_("%X%P: can not size stub section: %E\n")); |
| 412 | return; |
| 413 | } |
| 414 | } |
| 415 | } |
| 416 | |
| 417 | if (need_laying_out != -1) |
| 418 | ldelf_map_segments (need_laying_out); |
| 419 | } |
| 420 | |
| 421 | static void |
| 422 | gld${EMULATION_NAME}_finish (void) |
| 423 | { |
| 424 | struct bfd_link_hash_entry * h; |
| 425 | |
| 426 | { |
| 427 | LANG_FOR_EACH_INPUT_STATEMENT (is) |
| 428 | { |
| 429 | /* Figure out where VFP11 erratum veneers (and the labels returning |
| 430 | from same) have been placed. */ |
| 431 | bfd_elf32_arm_vfp11_fix_veneer_locations (is->the_bfd, &link_info); |
| 432 | |
| 433 | /* Figure out where STM32L4XX erratum veneers (and the labels returning |
| 434 | from them) have been placed. */ |
| 435 | bfd_elf32_arm_stm32l4xx_fix_veneer_locations (is->the_bfd, &link_info); |
| 436 | } |
| 437 | } |
| 438 | |
| 439 | if (!bfd_link_relocatable (&link_info)) |
| 440 | { |
| 441 | /* Now build the linker stubs. */ |
| 442 | if (stub_file->the_bfd->sections != NULL) |
| 443 | { |
| 444 | if (! elf32_arm_build_stubs (& link_info)) |
| 445 | einfo (_("%X%P: can not build stubs: %E\n")); |
| 446 | } |
| 447 | } |
| 448 | |
| 449 | finish_default (); |
| 450 | |
| 451 | if (params.thumb_entry_symbol) |
| 452 | { |
| 453 | h = bfd_link_hash_lookup (link_info.hash, params.thumb_entry_symbol, |
| 454 | FALSE, FALSE, TRUE); |
| 455 | } |
| 456 | else |
| 457 | { |
| 458 | struct elf_link_hash_entry * eh; |
| 459 | |
| 460 | if (!entry_symbol.name) |
| 461 | return; |
| 462 | |
| 463 | h = bfd_link_hash_lookup (link_info.hash, entry_symbol.name, |
| 464 | FALSE, FALSE, TRUE); |
| 465 | eh = (struct elf_link_hash_entry *)h; |
| 466 | if (!h || ARM_GET_SYM_BRANCH_TYPE (eh->target_internal) |
| 467 | != ST_BRANCH_TO_THUMB) |
| 468 | return; |
| 469 | } |
| 470 | |
| 471 | |
| 472 | if (h != (struct bfd_link_hash_entry *) NULL |
| 473 | && (h->type == bfd_link_hash_defined |
| 474 | || h->type == bfd_link_hash_defweak) |
| 475 | && h->u.def.section->output_section != NULL) |
| 476 | { |
| 477 | static char buffer[32]; |
| 478 | bfd_vma val; |
| 479 | |
| 480 | /* Special procesing is required for a Thumb entry symbol. The |
| 481 | bottom bit of its address must be set. */ |
| 482 | val = (h->u.def.value |
| 483 | + bfd_section_vma (h->u.def.section->output_section) |
| 484 | + h->u.def.section->output_offset); |
| 485 | |
| 486 | val |= 1; |
| 487 | |
| 488 | /* Now convert this value into a string and store it in entry_symbol |
| 489 | where the lang_finish() function will pick it up. */ |
| 490 | buffer[0] = '0'; |
| 491 | buffer[1] = 'x'; |
| 492 | |
| 493 | sprintf_vma (buffer + 2, val); |
| 494 | |
| 495 | if (params.thumb_entry_symbol != NULL && entry_symbol.name != NULL |
| 496 | && entry_from_cmdline) |
| 497 | einfo (_("%P: warning: '--thumb-entry %s' is overriding '-e %s'\n"), |
| 498 | params.thumb_entry_symbol, entry_symbol.name); |
| 499 | entry_symbol.name = buffer; |
| 500 | } |
| 501 | else |
| 502 | einfo (_("%P: warning: cannot find thumb start symbol %s\n"), |
| 503 | h->root.string); |
| 504 | } |
| 505 | |
| 506 | /* This is a convenient point to tell BFD about target specific flags. |
| 507 | After the output has been created, but before inputs are read. */ |
| 508 | static void |
| 509 | arm_elf_create_output_section_statements (void) |
| 510 | { |
| 511 | if (strstr (bfd_get_target (link_info.output_bfd), "arm") == NULL) |
| 512 | { |
| 513 | /* The arm backend needs special fields in the output hash structure. |
| 514 | These will only be created if the output format is an arm format, |
| 515 | hence we do not support linking and changing output formats at the |
| 516 | same time. Use a link followed by objcopy to change output formats. */ |
| 517 | einfo (_("%F%P: error: cannot change output format " |
| 518 | "whilst linking %s binaries\n"), "ARM"); |
| 519 | return; |
| 520 | } |
| 521 | |
| 522 | if (in_implib_filename) |
| 523 | { |
| 524 | params.in_implib_bfd = bfd_openr (in_implib_filename, |
| 525 | bfd_get_target (link_info.output_bfd)); |
| 526 | |
| 527 | if (params.in_implib_bfd == NULL) |
| 528 | einfo (_("%F%P: %s: can't open: %E\n"), in_implib_filename); |
| 529 | |
| 530 | if (!bfd_check_format (params.in_implib_bfd, bfd_object)) |
| 531 | einfo (_("%F%P: %s: not a relocatable file: %E\n"), in_implib_filename); |
| 532 | } |
| 533 | |
| 534 | bfd_elf32_arm_set_target_params (link_info.output_bfd, &link_info, ¶ms); |
| 535 | |
| 536 | stub_file = lang_add_input_file ("linker stubs", |
| 537 | lang_input_file_is_fake_enum, |
| 538 | NULL); |
| 539 | stub_file->the_bfd = bfd_create ("linker stubs", link_info.output_bfd); |
| 540 | if (stub_file->the_bfd == NULL |
| 541 | || ! bfd_set_arch_mach (stub_file->the_bfd, |
| 542 | bfd_get_arch (link_info.output_bfd), |
| 543 | bfd_get_mach (link_info.output_bfd))) |
| 544 | { |
| 545 | einfo (_("%F%P: can not create BFD: %E\n")); |
| 546 | return; |
| 547 | } |
| 548 | |
| 549 | stub_file->the_bfd->flags |= BFD_LINKER_CREATED; |
| 550 | ldlang_add_file (stub_file); |
| 551 | |
| 552 | /* Also use the stub file for stubs placed in a single output section. */ |
| 553 | bfd_elf32_arm_add_glue_sections_to_bfd (stub_file->the_bfd, &link_info); |
| 554 | bfd_elf32_arm_get_bfd_for_interworking (stub_file->the_bfd, &link_info); |
| 555 | } |
| 556 | |
| 557 | EOF |
| 558 | |
| 559 | # Define some shell vars to insert bits of code into the standard elf |
| 560 | # parse_args and list_options functions. |
| 561 | # |
| 562 | PARSE_AND_LIST_PROLOGUE=' |
| 563 | #define OPTION_THUMB_ENTRY 301 |
| 564 | #define OPTION_BE8 302 |
| 565 | #define OPTION_TARGET1_REL 303 |
| 566 | #define OPTION_TARGET1_ABS 304 |
| 567 | #define OPTION_TARGET2 305 |
| 568 | #define OPTION_FIX_V4BX 306 |
| 569 | #define OPTION_USE_BLX 307 |
| 570 | #define OPTION_VFP11_DENORM_FIX 308 |
| 571 | #define OPTION_NO_ENUM_SIZE_WARNING 309 |
| 572 | #define OPTION_PIC_VENEER 310 |
| 573 | #define OPTION_FIX_V4BX_INTERWORKING 311 |
| 574 | #define OPTION_STUBGROUP_SIZE 312 |
| 575 | #define OPTION_NO_WCHAR_SIZE_WARNING 313 |
| 576 | #define OPTION_FIX_CORTEX_A8 314 |
| 577 | #define OPTION_NO_FIX_CORTEX_A8 315 |
| 578 | #define OPTION_NO_MERGE_EXIDX_ENTRIES 316 |
| 579 | #define OPTION_FIX_ARM1176 317 |
| 580 | #define OPTION_NO_FIX_ARM1176 318 |
| 581 | #define OPTION_LONG_PLT 319 |
| 582 | #define OPTION_STM32L4XX_FIX 320 |
| 583 | #define OPTION_CMSE_IMPLIB 321 |
| 584 | #define OPTION_IN_IMPLIB 322 |
| 585 | ' |
| 586 | |
| 587 | PARSE_AND_LIST_SHORTOPTS=p |
| 588 | |
| 589 | PARSE_AND_LIST_LONGOPTS=' |
| 590 | { "no-pipeline-knowledge", no_argument, NULL, '\'p\''}, |
| 591 | { "thumb-entry", required_argument, NULL, OPTION_THUMB_ENTRY}, |
| 592 | { "be8", no_argument, NULL, OPTION_BE8}, |
| 593 | { "target1-rel", no_argument, NULL, OPTION_TARGET1_REL}, |
| 594 | { "target1-abs", no_argument, NULL, OPTION_TARGET1_ABS}, |
| 595 | { "target2", required_argument, NULL, OPTION_TARGET2}, |
| 596 | { "fix-v4bx", no_argument, NULL, OPTION_FIX_V4BX}, |
| 597 | { "fix-v4bx-interworking", no_argument, NULL, OPTION_FIX_V4BX_INTERWORKING}, |
| 598 | { "use-blx", no_argument, NULL, OPTION_USE_BLX}, |
| 599 | { "vfp11-denorm-fix", required_argument, NULL, OPTION_VFP11_DENORM_FIX}, |
| 600 | { "fix-stm32l4xx-629360", optional_argument, NULL, OPTION_STM32L4XX_FIX}, |
| 601 | { "no-enum-size-warning", no_argument, NULL, OPTION_NO_ENUM_SIZE_WARNING}, |
| 602 | { "pic-veneer", no_argument, NULL, OPTION_PIC_VENEER}, |
| 603 | { "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE }, |
| 604 | { "no-wchar-size-warning", no_argument, NULL, OPTION_NO_WCHAR_SIZE_WARNING}, |
| 605 | { "fix-cortex-a8", no_argument, NULL, OPTION_FIX_CORTEX_A8 }, |
| 606 | { "no-fix-cortex-a8", no_argument, NULL, OPTION_NO_FIX_CORTEX_A8 }, |
| 607 | { "no-merge-exidx-entries", no_argument, NULL, OPTION_NO_MERGE_EXIDX_ENTRIES }, |
| 608 | { "fix-arm1176", no_argument, NULL, OPTION_FIX_ARM1176 }, |
| 609 | { "no-fix-arm1176", no_argument, NULL, OPTION_NO_FIX_ARM1176 }, |
| 610 | { "long-plt", no_argument, NULL, OPTION_LONG_PLT }, |
| 611 | { "cmse-implib", no_argument, NULL, OPTION_CMSE_IMPLIB }, |
| 612 | { "in-implib", required_argument, NULL, OPTION_IN_IMPLIB }, |
| 613 | ' |
| 614 | |
| 615 | PARSE_AND_LIST_OPTIONS=' |
| 616 | fprintf (file, _(" --thumb-entry=<sym> Set the entry point to be Thumb symbol <sym>\n")); |
| 617 | fprintf (file, _(" --be8 Output BE8 format image\n")); |
| 618 | fprintf (file, _(" --target1-rel Interpret R_ARM_TARGET1 as R_ARM_REL32\n")); |
| 619 | fprintf (file, _(" --target1-abs Interpret R_ARM_TARGET1 as R_ARM_ABS32\n")); |
| 620 | fprintf (file, _(" --target2=<type> Specify definition of R_ARM_TARGET2\n")); |
| 621 | fprintf (file, _(" --fix-v4bx Rewrite BX rn as MOV pc, rn for ARMv4\n")); |
| 622 | fprintf (file, _(" --fix-v4bx-interworking Rewrite BX rn branch to ARMv4 interworking veneer\n")); |
| 623 | fprintf (file, _(" --use-blx Enable use of BLX instructions\n")); |
| 624 | fprintf (file, _(" --vfp11-denorm-fix Specify how to fix VFP11 denorm erratum\n")); |
| 625 | fprintf (file, _(" --fix-stm32l4xx-629360 Specify how to fix STM32L4XX 629360 erratum\n")); |
| 626 | fprintf (file, _(" --no-enum-size-warning Don'\''t warn about objects with incompatible\n" |
| 627 | " enum sizes\n")); |
| 628 | fprintf (file, _(" --no-wchar-size-warning Don'\''t warn about objects with incompatible\n" |
| 629 | " wchar_t sizes\n")); |
| 630 | fprintf (file, _(" --pic-veneer Always generate PIC interworking veneers\n")); |
| 631 | fprintf (file, _(" --long-plt Generate long .plt entries\n" |
| 632 | " to handle large .plt/.got displacements\n")); |
| 633 | fprintf (file, _(" --cmse-implib Make import library to be a secure gateway import\n" |
| 634 | " library as per ARMv8-M Security Extensions\n")); |
| 635 | fprintf (file, _(" --in-implib Import library whose symbols address must\n" |
| 636 | " remain stable\n")); |
| 637 | fprintf (file, _("\ |
| 638 | --stub-group-size=N Maximum size of a group of input sections that\n\ |
| 639 | can be handled by one stub section. A negative\n\ |
| 640 | value locates all stubs after their branches\n\ |
| 641 | (with a group size of -N), while a positive\n\ |
| 642 | value allows two groups of input sections, one\n\ |
| 643 | before, and one after each stub section.\n\ |
| 644 | Values of +/-1 indicate the linker should\n\ |
| 645 | choose suitable defaults.\n")); |
| 646 | fprintf (file, _(" --[no-]fix-cortex-a8 Disable/enable Cortex-A8 Thumb-2 branch erratum fix\n")); |
| 647 | fprintf (file, _(" --no-merge-exidx-entries Disable merging exidx entries\n")); |
| 648 | fprintf (file, _(" --[no-]fix-arm1176 Disable/enable ARM1176 BLX immediate erratum fix\n")); |
| 649 | ' |
| 650 | |
| 651 | PARSE_AND_LIST_ARGS_CASES=' |
| 652 | case '\'p\'': |
| 653 | /* Only here for backwards compatibility. */ |
| 654 | break; |
| 655 | |
| 656 | case OPTION_THUMB_ENTRY: |
| 657 | params.thumb_entry_symbol = optarg; |
| 658 | break; |
| 659 | |
| 660 | case OPTION_BE8: |
| 661 | params.byteswap_code = 1; |
| 662 | break; |
| 663 | |
| 664 | case OPTION_TARGET1_REL: |
| 665 | params.target1_is_rel = 1; |
| 666 | break; |
| 667 | |
| 668 | case OPTION_TARGET1_ABS: |
| 669 | params.target1_is_rel = 0; |
| 670 | break; |
| 671 | |
| 672 | case OPTION_TARGET2: |
| 673 | params.target2_type = optarg; |
| 674 | break; |
| 675 | |
| 676 | case OPTION_FIX_V4BX: |
| 677 | params.fix_v4bx = 1; |
| 678 | break; |
| 679 | |
| 680 | case OPTION_FIX_V4BX_INTERWORKING: |
| 681 | params.fix_v4bx = 2; |
| 682 | break; |
| 683 | |
| 684 | case OPTION_USE_BLX: |
| 685 | params.use_blx = 1; |
| 686 | break; |
| 687 | |
| 688 | case OPTION_VFP11_DENORM_FIX: |
| 689 | if (strcmp (optarg, "none") == 0) |
| 690 | params.vfp11_denorm_fix = BFD_ARM_VFP11_FIX_NONE; |
| 691 | else if (strcmp (optarg, "scalar") == 0) |
| 692 | params.vfp11_denorm_fix = BFD_ARM_VFP11_FIX_SCALAR; |
| 693 | else if (strcmp (optarg, "vector") == 0) |
| 694 | params.vfp11_denorm_fix = BFD_ARM_VFP11_FIX_VECTOR; |
| 695 | else |
| 696 | einfo (_("%P: unrecognized VFP11 fix type '\''%s'\''\n"), optarg); |
| 697 | break; |
| 698 | |
| 699 | case OPTION_STM32L4XX_FIX: |
| 700 | if (!optarg) |
| 701 | params.stm32l4xx_fix = BFD_ARM_STM32L4XX_FIX_DEFAULT; |
| 702 | else if (strcmp (optarg, "none") == 0) |
| 703 | params.stm32l4xx_fix = BFD_ARM_STM32L4XX_FIX_NONE; |
| 704 | else if (strcmp (optarg, "default") == 0) |
| 705 | params.stm32l4xx_fix = BFD_ARM_STM32L4XX_FIX_DEFAULT; |
| 706 | else if (strcmp (optarg, "all") == 0) |
| 707 | params.stm32l4xx_fix = BFD_ARM_STM32L4XX_FIX_ALL; |
| 708 | else |
| 709 | einfo (_("%P: unrecognized STM32L4XX fix type '\''%s'\''\n"), optarg); |
| 710 | break; |
| 711 | |
| 712 | case OPTION_NO_ENUM_SIZE_WARNING: |
| 713 | params.no_enum_size_warning = 1; |
| 714 | break; |
| 715 | |
| 716 | case OPTION_NO_WCHAR_SIZE_WARNING: |
| 717 | params.no_wchar_size_warning = 1; |
| 718 | break; |
| 719 | |
| 720 | case OPTION_PIC_VENEER: |
| 721 | params.pic_veneer = 1; |
| 722 | break; |
| 723 | |
| 724 | case OPTION_STUBGROUP_SIZE: |
| 725 | { |
| 726 | const char *end; |
| 727 | |
| 728 | group_size = bfd_scan_vma (optarg, &end, 0); |
| 729 | if (*end) |
| 730 | einfo (_("%F%P: invalid number `%s'\''\n"), optarg); |
| 731 | } |
| 732 | break; |
| 733 | |
| 734 | case OPTION_FIX_CORTEX_A8: |
| 735 | params.fix_cortex_a8 = 1; |
| 736 | break; |
| 737 | |
| 738 | case OPTION_NO_FIX_CORTEX_A8: |
| 739 | params.fix_cortex_a8 = 0; |
| 740 | break; |
| 741 | |
| 742 | case OPTION_NO_MERGE_EXIDX_ENTRIES: |
| 743 | params.merge_exidx_entries = 0; |
| 744 | break; |
| 745 | |
| 746 | case OPTION_FIX_ARM1176: |
| 747 | params.fix_arm1176 = 1; |
| 748 | break; |
| 749 | |
| 750 | case OPTION_NO_FIX_ARM1176: |
| 751 | params.fix_arm1176 = 0; |
| 752 | break; |
| 753 | |
| 754 | case OPTION_LONG_PLT: |
| 755 | bfd_elf32_arm_use_long_plt (); |
| 756 | break; |
| 757 | |
| 758 | case OPTION_CMSE_IMPLIB: |
| 759 | params.cmse_implib = 1; |
| 760 | break; |
| 761 | |
| 762 | case OPTION_IN_IMPLIB: |
| 763 | in_implib_filename = optarg; |
| 764 | break; |
| 765 | ' |
| 766 | |
| 767 | # We have our own before_allocation etc. functions, but they call |
| 768 | # the standard routines, so give them a different name. |
| 769 | LDEMUL_BEFORE_ALLOCATION=arm_elf_before_allocation |
| 770 | LDEMUL_AFTER_ALLOCATION=gld${EMULATION_NAME}_after_allocation |
| 771 | LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=arm_elf_create_output_section_statements |
| 772 | |
| 773 | # Replace the elf before_parse function with our own. |
| 774 | LDEMUL_BEFORE_PARSE=gld"${EMULATION_NAME}"_before_parse |
| 775 | LDEMUL_SET_SYMBOLS=gld"${EMULATION_NAME}"_set_symbols |
| 776 | |
| 777 | # Call the extra arm-elf function |
| 778 | LDEMUL_FINISH=gld${EMULATION_NAME}_finish |