ld/emultempl/armelf.em

   1 # This shell script emits a C file. -*- C -*-
   2 #   Copyright (C) 1991-2016 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 elf32.em, and defines extra arm-elf
  23 # specific routines.
  24 #
  25 test -z "$TARGET2_TYPE" && TARGET2_TYPE="rel"
  26 fragment <<EOF
  27
  28 #include "ldctor.h"
  29 #include "elf/arm.h"
  30
  31 static char * thumb_entry_symbol = NULL;
  32 static int byteswap_code = 0;
  33 static int target1_is_rel = 0${TARGET1_IS_REL};
  34 static char * target2_type = "${TARGET2_TYPE}";
  35 static int fix_v4bx = 0;
  36 static int use_blx = 0;
  37 static bfd_arm_vfp11_fix vfp11_denorm_fix = BFD_ARM_VFP11_FIX_DEFAULT;
  38 static bfd_arm_stm32l4xx_fix stm32l4xx_fix = BFD_ARM_STM32L4XX_FIX_NONE;
  39 static int fix_cortex_a8 = -1;
  40 static int no_enum_size_warning = 0;
  41 static int no_wchar_size_warning = 0;
  42 static int pic_veneer = 0;
  43 static int merge_exidx_entries = -1;
  44 static int fix_arm1176 = 1;
  45 static int cmse_implib = 0;
  46
  47 static void
  48 gld${EMULATION_NAME}_before_parse (void)
  49 {
  50 #ifndef TARGET_                 /* I.e., if not generic.  */
  51   ldfile_set_output_arch ("`echo ${ARCH}`", bfd_arch_unknown);
  52 #endif /* not TARGET_ */
  53   input_flags.dynamic = ${DYNAMIC_LINK-TRUE};
  54   config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo TRUE ; else echo FALSE ; fi`;
  55   config.separate_code = `if test "x${SEPARATE_CODE}" = xyes ; then echo TRUE ; else echo FALSE ; fi`;
  56 }
  57
  58 static void
  59 gld${EMULATION_NAME}_set_symbols (void)
  60 {
  61   /* PR 19106: The section resizing code in gldarmelf_after_allocation
  62      is effectively the same as relaxation, so prevent early memory
  63      region checks which produce bogus error messages.
  64      Note - this test has nothing to do with symbols.  It is just here
  65      because this is the first emulation routine that is called after
  66      the command line has been parsed.  */
  67   if (!bfd_link_relocatable (&link_info))
  68     TARGET_ENABLE_RELAXATION;
  69 }
  70
  71 static void
  72 arm_elf_before_allocation (void)
  73 {
  74   bfd_elf32_arm_set_byteswap_code (&link_info, byteswap_code);
  75
  76   /* Choose type of VFP11 erratum fix, or warn if specified fix is unnecessary
  77      due to architecture version.  */
  78   bfd_elf32_arm_set_vfp11_fix (link_info.output_bfd, &link_info);
  79
  80   /* Choose type of STM32L4XX erratum fix, or warn if specified fix is
  81      unnecessary due to architecture version.  */
  82   bfd_elf32_arm_set_stm32l4xx_fix (link_info.output_bfd, &link_info);
  83
  84   /* Auto-select Cortex-A8 erratum fix if it wasn't explicitly specified.  */
  85   bfd_elf32_arm_set_cortex_a8_fix (link_info.output_bfd, &link_info);
  86
  87   /* Ensure the output sections of veneers needing a dedicated one is not
  88      removed.  */
  89   bfd_elf32_arm_keep_private_stub_output_sections (&link_info);
  90
  91   /* We should be able to set the size of the interworking stub section.  We
  92      can't do it until later if we have dynamic sections, though.  */
  93   if (elf_hash_table (&link_info)->dynobj == NULL)
  94     {
  95       /* Here we rummage through the found bfds to collect glue information.  */
  96       LANG_FOR_EACH_INPUT_STATEMENT (is)
  97         {
  98           /* Initialise mapping tables for code/data.  */
  99           bfd_elf32_arm_init_maps (is->the_bfd);
 100
 101           if (!bfd_elf32_arm_process_before_allocation (is->the_bfd,
 102                                                         &link_info)
 103               || !bfd_elf32_arm_vfp11_erratum_scan (is->the_bfd, &link_info)
 104               || !bfd_elf32_arm_stm32l4xx_erratum_scan (is->the_bfd,
 105                                                         &link_info))
 106             /* xgettext:c-format */
 107             einfo (_("Errors encountered processing file %s"), is->filename);
 108         }
 109
 110       /* We have seen it all.  Allocate it, and carry on.  */
 111       bfd_elf32_arm_allocate_interworking_sections (& link_info);
 112     }
 113
 114   /* Call the standard elf routine.  */
 115   gld${EMULATION_NAME}_before_allocation ();
 116 }
 117
 118 /* Fake input file for stubs.  */
 119 static lang_input_statement_type *stub_file;
 120
 121 /* Whether we need to call gldarm_layout_sections_again.  */
 122 static int need_laying_out = 0;
 123
 124 /* Maximum size of a group of input sections that can be handled by
 125    one stub section.  A value of +/-1 indicates the bfd back-end
 126    should use a suitable default size.  */
 127 static bfd_signed_vma group_size = 1;
 128
 129 struct hook_stub_info
 130 {
 131   lang_statement_list_type add;
 132   asection *input_section;
 133 };
 134
 135 /* Traverse the linker tree to find the spot where the stub goes.  */
 136
 137 static bfd_boolean
 138 hook_in_stub (struct hook_stub_info *info, lang_statement_union_type **lp)
 139 {
 140   lang_statement_union_type *l;
 141   bfd_boolean ret;
 142
 143   for (; (l = *lp) != NULL; lp = &l->header.next)
 144     {
 145       switch (l->header.type)
 146         {
 147         case lang_constructors_statement_enum:
 148           ret = hook_in_stub (info, &constructor_list.head);
 149           if (ret)
 150             return ret;
 151           break;
 152
 153         case lang_output_section_statement_enum:
 154           ret = hook_in_stub (info,
 155                               &l->output_section_statement.children.head);
 156           if (ret)
 157             return ret;
 158           break;
 159
 160         case lang_wild_statement_enum:
 161           ret = hook_in_stub (info, &l->wild_statement.children.head);
 162           if (ret)
 163             return ret;
 164           break;
 165
 166         case lang_group_statement_enum:
 167           ret = hook_in_stub (info, &l->group_statement.children.head);
 168           if (ret)
 169             return ret;
 170           break;
 171
 172         case lang_input_section_enum:
 173           if (l->input_section.section == info->input_section)
 174             {
 175               /* We've found our section.  Insert the stub immediately
 176                  after its associated input section.  */
 177               *(info->add.tail) = l->header.next;
 178               l->header.next = info->add.head;
 179               return TRUE;
 180             }
 181           break;
 182
 183         case lang_data_statement_enum:
 184         case lang_reloc_statement_enum:
 185         case lang_object_symbols_statement_enum:
 186         case lang_output_statement_enum:
 187         case lang_target_statement_enum:
 188         case lang_input_statement_enum:
 189         case lang_assignment_statement_enum:
 190         case lang_padding_statement_enum:
 191         case lang_address_statement_enum:
 192         case lang_fill_statement_enum:
 193           break;
 194
 195         default:
 196           FAIL ();
 197           break;
 198         }
 199     }
 200   return FALSE;
 201 }
 202
 203
 204 /* Call-back for elf32_arm_size_stubs.  */
 205
 206 /* Create a new stub section, and arrange for it to be linked
 207    immediately after INPUT_SECTION.  */
 208
 209 static asection *
 210 elf32_arm_add_stub_section (const char * stub_sec_name,
 211                             asection *   output_section,
 212                             asection *   after_input_section,
 213                             unsigned int alignment_power)
 214 {
 215   asection *stub_sec;
 216   flagword flags;
 217   lang_output_section_statement_type *os;
 218   struct hook_stub_info info;
 219
 220   flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE
 221            | SEC_HAS_CONTENTS | SEC_RELOC | SEC_IN_MEMORY | SEC_KEEP);
 222   stub_sec = bfd_make_section_anyway_with_flags (stub_file->the_bfd,
 223                                                  stub_sec_name, flags);
 224   if (stub_sec == NULL)
 225     goto err_ret;
 226
 227   bfd_set_section_alignment (stub_file->the_bfd, stub_sec, alignment_power);
 228
 229   os = lang_output_section_get (output_section);
 230
 231   info.input_section = after_input_section;
 232   lang_list_init (&info.add);
 233   lang_add_section (&info.add, stub_sec, NULL, os);
 234
 235   if (info.add.head == NULL)
 236     goto err_ret;
 237
 238   if (after_input_section == NULL)
 239     {
 240       lang_statement_union_type **lp = &os->children.head;
 241       lang_statement_union_type *l, *lprev = NULL;
 242
 243       for (; (l = *lp) != NULL; lp = &l->header.next, lprev = l);
 244
 245       if (lprev)
 246         lprev->header.next = info.add.head;
 247       else
 248         os->children.head = info.add.head;
 249
 250       return stub_sec;
 251     }
 252   else
 253     {
 254       if (hook_in_stub (&info, &os->children.head))
 255         return stub_sec;
 256     }
 257
 258  err_ret:
 259   einfo ("%X%P: can not make stub section: %E\n");
 260   return NULL;
 261 }
 262
 263 /* Another call-back for elf_arm_size_stubs.  */
 264
 265 static void
 266 gldarm_layout_sections_again (void)
 267 {
 268   /* If we have changed sizes of the stub sections, then we need
 269      to recalculate all the section offsets.  This may mean we need to
 270      add even more stubs.  */
 271   gld${EMULATION_NAME}_map_segments (TRUE);
 272   need_laying_out = -1;
 273 }
 274
 275 static void
 276 build_section_lists (lang_statement_union_type *statement)
 277 {
 278   if (statement->header.type == lang_input_section_enum)
 279     {
 280       asection *i = statement->input_section.section;
 281
 282       if (i->sec_info_type != SEC_INFO_TYPE_JUST_SYMS
 283           && (i->flags & SEC_EXCLUDE) == 0
 284           && i->output_section != NULL
 285           && i->output_section->owner == link_info.output_bfd)
 286         elf32_arm_next_input_section (& link_info, i);
 287     }
 288 }
 289
 290 static int
 291 compare_output_sec_vma (const void *a, const void *b)
 292 {
 293   asection *asec = *(asection **) a, *bsec = *(asection **) b;
 294   asection *aout = asec->output_section, *bout = bsec->output_section;
 295   bfd_vma avma, bvma;
 296
 297   /* If there's no output section for some reason, compare equal.  */
 298   if (!aout || !bout)
 299     return 0;
 300
 301   avma = aout->vma + asec->output_offset;
 302   bvma = bout->vma + bsec->output_offset;
 303
 304   if (avma > bvma)
 305     return 1;
 306   else if (avma < bvma)
 307     return -1;
 308
 309   return 0;
 310 }
 311
 312 static void
 313 gld${EMULATION_NAME}_after_allocation (void)
 314 {
 315   int ret;
 316
 317   /* Build a sorted list of input text sections, then use that to process
 318      the unwind table index.  */
 319   unsigned int list_size = 10;
 320   asection **sec_list = (asection **)
 321       xmalloc (list_size * sizeof (asection *));
 322   unsigned int sec_count = 0;
 323
 324   LANG_FOR_EACH_INPUT_STATEMENT (is)
 325     {
 326       bfd *abfd = is->the_bfd;
 327       asection *sec;
 328
 329       if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0)
 330         continue;
 331
 332       for (sec = abfd->sections; sec != NULL; sec = sec->next)
 333         {
 334           asection *out_sec = sec->output_section;
 335
 336           if (out_sec
 337               && elf_section_data (sec)
 338               && elf_section_type (sec) == SHT_PROGBITS
 339               && (elf_section_flags (sec) & SHF_EXECINSTR) != 0
 340               && (sec->flags & SEC_EXCLUDE) == 0
 341               && sec->sec_info_type != SEC_INFO_TYPE_JUST_SYMS
 342               && out_sec != bfd_abs_section_ptr)
 343             {
 344               if (sec_count == list_size)
 345                 {
 346                   list_size *= 2;
 347                   sec_list = (asection **)
 348                       xrealloc (sec_list, list_size * sizeof (asection *));
 349                 }
 350
 351               sec_list[sec_count++] = sec;
 352             }
 353         }
 354     }
 355
 356   qsort (sec_list, sec_count, sizeof (asection *), &compare_output_sec_vma);
 357
 358   if (elf32_arm_fix_exidx_coverage (sec_list, sec_count, &link_info,
 359                                     merge_exidx_entries))
 360     need_laying_out = 1;
 361
 362   free (sec_list);
 363
 364   /* bfd_elf32_discard_info just plays with debugging sections,
 365      ie. doesn't affect any code, so we can delay resizing the
 366      sections.  It's likely we'll resize everything in the process of
 367      adding stubs.  */
 368   ret = bfd_elf_discard_info (link_info.output_bfd, & link_info);
 369   if (ret < 0)
 370     {
 371       einfo ("%X%P: .eh_frame/.stab edit: %E\n");
 372       return;
 373     }
 374   else if (ret > 0)
 375     need_laying_out = 1;
 376
 377   /* If generating a relocatable output file, then we don't
 378      have to examine the relocs.  */
 379   if (stub_file != NULL && !bfd_link_relocatable (&link_info))
 380     {
 381       ret = elf32_arm_setup_section_lists (link_info.output_bfd, &link_info);
 382       if (ret != 0)
 383         {
 384           if (ret < 0)
 385             {
 386               einfo ("%X%P: could not compute sections lists for stub generation: %E\n");
 387               return;
 388             }
 389
 390           lang_for_each_statement (build_section_lists);
 391
 392           /* Call into the BFD backend to do the real work.  */
 393           if (! elf32_arm_size_stubs (link_info.output_bfd,
 394                                       stub_file->the_bfd,
 395                                       & link_info,
 396                                       group_size,
 397                                       & elf32_arm_add_stub_section,
 398                                       & gldarm_layout_sections_again))
 399             {
 400               einfo ("%X%P: cannot size stub section: %E\n");
 401               return;
 402             }
 403         }
 404     }
 405
 406   if (need_laying_out != -1)
 407     gld${EMULATION_NAME}_map_segments (need_laying_out);
 408 }
 409
 410 static void
 411 gld${EMULATION_NAME}_finish (void)
 412 {
 413   struct bfd_link_hash_entry * h;
 414
 415   {
 416     LANG_FOR_EACH_INPUT_STATEMENT (is)
 417       {
 418         /* Figure out where VFP11 erratum veneers (and the labels returning
 419            from same) have been placed.  */
 420         bfd_elf32_arm_vfp11_fix_veneer_locations (is->the_bfd, &link_info);
 421
 422          /* Figure out where STM32L4XX erratum veneers (and the labels returning
 423            from them) have been placed.  */
 424         bfd_elf32_arm_stm32l4xx_fix_veneer_locations (is->the_bfd, &link_info);
 425       }
 426   }
 427
 428   if (!bfd_link_relocatable (&link_info))
 429     {
 430       /* Now build the linker stubs.  */
 431       if (stub_file->the_bfd->sections != NULL)
 432         {
 433           if (! elf32_arm_build_stubs (& link_info))
 434             einfo ("%X%P: can not build stubs: %E\n");
 435         }
 436     }
 437
 438   finish_default ();
 439
 440   if (thumb_entry_symbol)
 441     {
 442       h = bfd_link_hash_lookup (link_info.hash, thumb_entry_symbol,
 443                                 FALSE, FALSE, TRUE);
 444     }
 445   else
 446     {
 447       struct elf_link_hash_entry * eh;
 448
 449       if (!entry_symbol.name)
 450         return;
 451
 452       h = bfd_link_hash_lookup (link_info.hash, entry_symbol.name,
 453                                 FALSE, FALSE, TRUE);
 454       eh = (struct elf_link_hash_entry *)h;
 455       if (!h || ARM_GET_SYM_BRANCH_TYPE (eh->target_internal)
 456                 != ST_BRANCH_TO_THUMB)
 457         return;
 458     }
 459
 460
 461   if (h != (struct bfd_link_hash_entry *) NULL
 462       && (h->type == bfd_link_hash_defined
 463           || h->type == bfd_link_hash_defweak)
 464       && h->u.def.section->output_section != NULL)
 465     {
 466       static char buffer[32];
 467       bfd_vma val;
 468
 469       /* Special procesing is required for a Thumb entry symbol.  The
 470          bottom bit of its address must be set.  */
 471       val = (h->u.def.value
 472              + bfd_get_section_vma (link_info.output_bfd,
 473                                     h->u.def.section->output_section)
 474              + h->u.def.section->output_offset);
 475
 476       val |= 1;
 477
 478       /* Now convert this value into a string and store it in entry_symbol
 479          where the lang_finish() function will pick it up.  */
 480       buffer[0] = '0';
 481       buffer[1] = 'x';
 482
 483       sprintf_vma (buffer + 2, val);
 484
 485       if (thumb_entry_symbol != NULL && entry_symbol.name != NULL
 486           && entry_from_cmdline)
 487         einfo (_("%P: warning: '--thumb-entry %s' is overriding '-e %s'\n"),
 488                thumb_entry_symbol, entry_symbol.name);
 489       entry_symbol.name = buffer;
 490     }
 491   else
 492     einfo (_("%P: warning: cannot find thumb start symbol %s\n"),
 493            thumb_entry_symbol);
 494 }
 495
 496 /* This is a convenient point to tell BFD about target specific flags.
 497    After the output has been created, but before inputs are read.  */
 498 static void
 499 arm_elf_create_output_section_statements (void)
 500 {
 501   if (strstr (bfd_get_target (link_info.output_bfd), "arm") == NULL)
 502     {
 503       /* The arm backend needs special fields in the output hash structure.
 504          These will only be created if the output format is an arm format,
 505          hence we do not support linking and changing output formats at the
 506          same time.  Use a link followed by objcopy to change output formats.  */
 507       einfo ("%F%X%P: error: Cannot change output format whilst linking ARM binaries.\n");
 508       return;
 509     }
 510
 511   bfd_elf32_arm_set_target_relocs (link_info.output_bfd, &link_info,
 512                                    target1_is_rel,
 513                                    target2_type, fix_v4bx, use_blx,
 514                                    vfp11_denorm_fix, stm32l4xx_fix,
 515                                    no_enum_size_warning,
 516                                    no_wchar_size_warning,
 517                                    pic_veneer, fix_cortex_a8,
 518                                    fix_arm1176, cmse_implib);
 519
 520   stub_file = lang_add_input_file ("linker stubs",
 521                                    lang_input_file_is_fake_enum,
 522                                    NULL);
 523   stub_file->the_bfd = bfd_create ("linker stubs", link_info.output_bfd);
 524   if (stub_file->the_bfd == NULL
 525       || ! bfd_set_arch_mach (stub_file->the_bfd,
 526                               bfd_get_arch (link_info.output_bfd),
 527                               bfd_get_mach (link_info.output_bfd)))
 528     {
 529       einfo ("%X%P: can not create BFD %E\n");
 530       return;
 531     }
 532
 533   stub_file->the_bfd->flags |= BFD_LINKER_CREATED;
 534   ldlang_add_file (stub_file);
 535
 536   /* Also use the stub file for stubs placed in a single output section.  */
 537   bfd_elf32_arm_add_glue_sections_to_bfd (stub_file->the_bfd, &link_info);
 538   bfd_elf32_arm_get_bfd_for_interworking (stub_file->the_bfd, &link_info);
 539 }
 540
 541 /* Avoid processing the fake stub_file in vercheck, stat_needed and
 542    check_needed routines.  */
 543
 544 static void (*real_func) (lang_input_statement_type *);
 545
 546 static void arm_for_each_input_file_wrapper (lang_input_statement_type *l)
 547 {
 548   if (l != stub_file)
 549     (*real_func) (l);
 550 }
 551
 552 static void
 553 arm_lang_for_each_input_file (void (*func) (lang_input_statement_type *))
 554 {
 555   real_func = func;
 556   lang_for_each_input_file (&arm_for_each_input_file_wrapper);
 557 }
 558
 559 #define lang_for_each_input_file arm_lang_for_each_input_file
 560
 561 EOF
 562
 563 # Define some shell vars to insert bits of code into the standard elf
 564 # parse_args and list_options functions.
 565 #
 566 PARSE_AND_LIST_PROLOGUE='
 567 #define OPTION_THUMB_ENTRY              301
 568 #define OPTION_BE8                      302
 569 #define OPTION_TARGET1_REL              303
 570 #define OPTION_TARGET1_ABS              304
 571 #define OPTION_TARGET2                  305
 572 #define OPTION_FIX_V4BX                 306
 573 #define OPTION_USE_BLX                  307
 574 #define OPTION_VFP11_DENORM_FIX         308
 575 #define OPTION_NO_ENUM_SIZE_WARNING     309
 576 #define OPTION_PIC_VENEER               310
 577 #define OPTION_FIX_V4BX_INTERWORKING    311
 578 #define OPTION_STUBGROUP_SIZE           312
 579 #define OPTION_NO_WCHAR_SIZE_WARNING    313
 580 #define OPTION_FIX_CORTEX_A8            314
 581 #define OPTION_NO_FIX_CORTEX_A8         315
 582 #define OPTION_NO_MERGE_EXIDX_ENTRIES   316
 583 #define OPTION_FIX_ARM1176              317
 584 #define OPTION_NO_FIX_ARM1176           318
 585 #define OPTION_LONG_PLT                 319
 586 #define OPTION_STM32L4XX_FIX            320
 587 #define OPTION_CMSE_IMPLIB              321
 588 '
 589
 590 PARSE_AND_LIST_SHORTOPTS=p
 591
 592 PARSE_AND_LIST_LONGOPTS='
 593   { "no-pipeline-knowledge", no_argument, NULL, '\'p\''},
 594   { "thumb-entry", required_argument, NULL, OPTION_THUMB_ENTRY},
 595   { "be8", no_argument, NULL, OPTION_BE8},
 596   { "target1-rel", no_argument, NULL, OPTION_TARGET1_REL},
 597   { "target1-abs", no_argument, NULL, OPTION_TARGET1_ABS},
 598   { "target2", required_argument, NULL, OPTION_TARGET2},
 599   { "fix-v4bx", no_argument, NULL, OPTION_FIX_V4BX},
 600   { "fix-v4bx-interworking", no_argument, NULL, OPTION_FIX_V4BX_INTERWORKING},
 601   { "use-blx", no_argument, NULL, OPTION_USE_BLX},
 602   { "vfp11-denorm-fix", required_argument, NULL, OPTION_VFP11_DENORM_FIX},
 603   { "fix-stm32l4xx-629360", optional_argument, NULL, OPTION_STM32L4XX_FIX},
 604   { "no-enum-size-warning", no_argument, NULL, OPTION_NO_ENUM_SIZE_WARNING},
 605   { "pic-veneer", no_argument, NULL, OPTION_PIC_VENEER},
 606   { "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE },
 607   { "no-wchar-size-warning", no_argument, NULL, OPTION_NO_WCHAR_SIZE_WARNING},
 608   { "fix-cortex-a8", no_argument, NULL, OPTION_FIX_CORTEX_A8 },
 609   { "no-fix-cortex-a8", no_argument, NULL, OPTION_NO_FIX_CORTEX_A8 },
 610   { "no-merge-exidx-entries", no_argument, NULL, OPTION_NO_MERGE_EXIDX_ENTRIES },
 611   { "fix-arm1176", no_argument, NULL, OPTION_FIX_ARM1176 },
 612   { "no-fix-arm1176", no_argument, NULL, OPTION_NO_FIX_ARM1176 },
 613   { "long-plt", no_argument, NULL, OPTION_LONG_PLT },
 614   { "cmse-implib", no_argument, NULL, OPTION_CMSE_IMPLIB },
 615 '
 616
 617 PARSE_AND_LIST_OPTIONS='
 618   fprintf (file, _("  --thumb-entry=<sym>         Set the entry point to be Thumb symbol <sym>\n"));
 619   fprintf (file, _("  --be8                       Output BE8 format image\n"));
 620   fprintf (file, _("  --target1-rel               Interpret R_ARM_TARGET1 as R_ARM_REL32\n"));
 621   fprintf (file, _("  --target1-abs               Interpret R_ARM_TARGET1 as R_ARM_ABS32\n"));
 622   fprintf (file, _("  --target2=<type>            Specify definition of R_ARM_TARGET2\n"));
 623   fprintf (file, _("  --fix-v4bx                  Rewrite BX rn as MOV pc, rn for ARMv4\n"));
 624   fprintf (file, _("  --fix-v4bx-interworking     Rewrite BX rn branch to ARMv4 interworking veneer\n"));
 625   fprintf (file, _("  --use-blx                   Enable use of BLX instructions\n"));
 626   fprintf (file, _("  --vfp11-denorm-fix          Specify how to fix VFP11 denorm erratum\n"));
 627   fprintf (file, _("  --fix-stm32l4xx-629360      Specify how to fix STM32L4XX 629360 erratum\n"));
 628   fprintf (file, _("  --no-enum-size-warning      Don'\''t warn about objects with incompatible\n"
 629                    "                                enum sizes\n"));
 630   fprintf (file, _("  --no-wchar-size-warning     Don'\''t warn about objects with incompatible\n"
 631                    "                                wchar_t sizes\n"));
 632   fprintf (file, _("  --pic-veneer                Always generate PIC interworking veneers\n"));
 633   fprintf (file, _("  --long-plt                  Generate long .plt entries\n"
 634            "                              to handle large .plt/.got displacements\n"));
 635   fprintf (file, _("  --cmse-implib               Make import library to be a secure gateway import\n"
 636                    "                                library as per ARMv8-M Security Extensions\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       thumb_entry_symbol = optarg;
 658       break;
 659
 660     case OPTION_BE8:
 661       byteswap_code = 1;
 662       break;
 663
 664     case OPTION_TARGET1_REL:
 665       target1_is_rel = 1;
 666       break;
 667
 668     case OPTION_TARGET1_ABS:
 669       target1_is_rel = 0;
 670       break;
 671
 672     case OPTION_TARGET2:
 673       target2_type = optarg;
 674       break;
 675
 676     case OPTION_FIX_V4BX:
 677       fix_v4bx = 1;
 678       break;
 679
 680     case OPTION_FIX_V4BX_INTERWORKING:
 681       fix_v4bx = 2;
 682       break;
 683
 684     case OPTION_USE_BLX:
 685       use_blx = 1;
 686       break;
 687
 688     case OPTION_VFP11_DENORM_FIX:
 689       if (strcmp (optarg, "none") == 0)
 690         vfp11_denorm_fix = BFD_ARM_VFP11_FIX_NONE;
 691       else if (strcmp (optarg, "scalar") == 0)
 692         vfp11_denorm_fix = BFD_ARM_VFP11_FIX_SCALAR;
 693       else if (strcmp (optarg, "vector") == 0)
 694         vfp11_denorm_fix = BFD_ARM_VFP11_FIX_VECTOR;
 695       else
 696         einfo (_("Unrecognized VFP11 fix type '\''%s'\''.\n"), optarg);
 697       break;
 698
 699     case OPTION_STM32L4XX_FIX:
 700       if (!optarg)
 701         stm32l4xx_fix = BFD_ARM_STM32L4XX_FIX_DEFAULT;
 702       else if (strcmp (optarg, "none") == 0)
 703         stm32l4xx_fix = BFD_ARM_STM32L4XX_FIX_NONE;
 704       else if (strcmp (optarg, "default") == 0)
 705         stm32l4xx_fix = BFD_ARM_STM32L4XX_FIX_DEFAULT;
 706       else if (strcmp (optarg, "all") == 0)
 707         stm32l4xx_fix = BFD_ARM_STM32L4XX_FIX_ALL;
 708       else
 709         einfo (_("Unrecognized STM32L4XX fix type '\''%s'\''.\n"), optarg);
 710       break;
 711
 712     case OPTION_NO_ENUM_SIZE_WARNING:
 713       no_enum_size_warning = 1;
 714       break;
 715
 716     case OPTION_NO_WCHAR_SIZE_WARNING:
 717       no_wchar_size_warning = 1;
 718       break;
 719
 720     case OPTION_PIC_VENEER:
 721       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 (_("%P%F: invalid number `%s'\''\n"), optarg);
 731       }
 732       break;
 733
 734     case OPTION_FIX_CORTEX_A8:
 735       fix_cortex_a8 = 1;
 736       break;
 737
 738     case OPTION_NO_FIX_CORTEX_A8:
 739       fix_cortex_a8 = 0;
 740       break;
 741
 742    case OPTION_NO_MERGE_EXIDX_ENTRIES:
 743       merge_exidx_entries = 0;
 744       break;
 745
 746    case OPTION_FIX_ARM1176:
 747       fix_arm1176 = 1;
 748       break;
 749
 750    case OPTION_NO_FIX_ARM1176:
 751       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       cmse_implib = 1;
 760       break;
 761 '
 762
 763 # We have our own before_allocation etc. functions, but they call
 764 # the standard routines, so give them a different name.
 765 LDEMUL_BEFORE_ALLOCATION=arm_elf_before_allocation
 766 LDEMUL_AFTER_ALLOCATION=gld${EMULATION_NAME}_after_allocation
 767 LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=arm_elf_create_output_section_statements
 768
 769 # Replace the elf before_parse function with our own.
 770 LDEMUL_BEFORE_PARSE=gld"${EMULATION_NAME}"_before_parse
 771 LDEMUL_SET_SYMBOLS=gld"${EMULATION_NAME}"_set_symbols
 772
 773 # Call the extra arm-elf function
 774 LDEMUL_FINISH=gld${EMULATION_NAME}_finish