ld/emultempl/armelf.em

   1 # This shell script emits a C file. -*- C -*-
   2 #   Copyright (C) 1991-2015 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 = "${TARGET2_TYPE}";
  35 static int fix_v4bx = 0;
  36 static int use_blx = 0;
  37 static bfd_arm_vfp11_fix vfp11_denorm_fix = BFD_ARM_VFP11_FIX_DEFAULT;
  38 static bfd_arm_stm32l4xx_fix stm32l4xx_fix = BFD_ARM_STM32L4XX_FIX_NONE;
  39 static int fix_cortex_a8 = -1;
  40 static int no_enum_size_warning = 0;
  41 static int no_wchar_size_warning = 0;
  42 static int pic_veneer = 0;
  43 static int merge_exidx_entries = -1;
  44 static int fix_arm1176 = 1;
  45
  46 static void
  47 gld${EMULATION_NAME}_before_parse (void)
  48 {
  49 #ifndef TARGET_                 /* I.e., if not generic.  */
  50   ldfile_set_output_arch ("`echo ${ARCH}`", bfd_arch_unknown);
  51 #endif /* not TARGET_ */
  52   input_flags.dynamic = ${DYNAMIC_LINK-TRUE};
  53   config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo TRUE ; else echo FALSE ; fi`;
  54   config.separate_code = `if test "x${SEPARATE_CODE}" = xyes ; then echo TRUE ; else echo FALSE ; fi`;
  55 }
  56
  57 static void
  58 gld${EMULATION_NAME}_set_symbols (void)
  59 {
  60   /* PR 19106: The section resizing code in gldarmelf_after_allocation
  61      is effectively the same as relaxation, so prevent early memory
  62      region checks which produce bogus error messages.
  63      Note - this test has nothing to do with symbols.  It is just here
  64      because this is the first emulation routine that is called after
  65      the command line has been parsed.  */
  66   if (!bfd_link_relocatable (&link_info))
  67     TARGET_ENABLE_RELAXATION;
  68 }
  69
  70 static void
  71 arm_elf_before_allocation (void)
  72 {
  73   bfd_elf32_arm_set_byteswap_code (&link_info, byteswap_code);
  74
  75   /* Choose type of VFP11 erratum fix, or warn if specified fix is unnecessary
  76      due to architecture version.  */
  77   bfd_elf32_arm_set_vfp11_fix (link_info.output_bfd, &link_info);
  78
  79   /* Choose type of STM32L4XX erratum fix, or warn if specified fix is
  80      unnecessary due to architecture version.  */
  81   bfd_elf32_arm_set_stm32l4xx_fix (link_info.output_bfd, &link_info);
  82
  83   /* Auto-select Cortex-A8 erratum fix if it wasn't explicitly specified.  */
  84   bfd_elf32_arm_set_cortex_a8_fix (link_info.output_bfd, &link_info);
  85
  86   /* We should be able to set the size of the interworking stub section.  We
  87      can't do it until later if we have dynamic sections, though.  */
  88   if (elf_hash_table (&link_info)->dynobj == NULL)
  89     {
  90       /* Here we rummage through the found bfds to collect glue information.  */
  91       LANG_FOR_EACH_INPUT_STATEMENT (is)
  92         {
  93           /* Initialise mapping tables for code/data.  */
  94           bfd_elf32_arm_init_maps (is->the_bfd);
  95
  96           if (!bfd_elf32_arm_process_before_allocation (is->the_bfd,
  97                                                         &link_info)
  98               || !bfd_elf32_arm_vfp11_erratum_scan (is->the_bfd, &link_info)
  99               || !bfd_elf32_arm_stm32l4xx_erratum_scan (is->the_bfd,
 100                                                         &link_info))
 101             /* xgettext:c-format */
 102             einfo (_("Errors encountered processing file %s"), is->filename);
 103         }
 104
 105       /* We have seen it all.  Allocate it, and carry on.  */
 106       bfd_elf32_arm_allocate_interworking_sections (& link_info);
 107     }
 108
 109   /* Call the standard elf routine.  */
 110   gld${EMULATION_NAME}_before_allocation ();
 111 }
 112
 113 /* Fake input file for stubs.  */
 114 static lang_input_statement_type *stub_file;
 115
 116 /* Whether we need to call gldarm_layout_sections_again.  */
 117 static int need_laying_out = 0;
 118
 119 /* Maximum size of a group of input sections that can be handled by
 120    one stub section.  A value of +/-1 indicates the bfd back-end
 121    should use a suitable default size.  */
 122 static bfd_signed_vma group_size = 1;
 123
 124 struct hook_stub_info
 125 {
 126   lang_statement_list_type add;
 127   asection *input_section;
 128 };
 129
 130 /* Traverse the linker tree to find the spot where the stub goes.  */
 131
 132 static bfd_boolean
 133 hook_in_stub (struct hook_stub_info *info, lang_statement_union_type **lp)
 134 {
 135   lang_statement_union_type *l;
 136   bfd_boolean ret;
 137
 138   for (; (l = *lp) != NULL; lp = &l->header.next)
 139     {
 140       switch (l->header.type)
 141         {
 142         case lang_constructors_statement_enum:
 143           ret = hook_in_stub (info, &constructor_list.head);
 144           if (ret)
 145             return ret;
 146           break;
 147
 148         case lang_output_section_statement_enum:
 149           ret = hook_in_stub (info,
 150                               &l->output_section_statement.children.head);
 151           if (ret)
 152             return ret;
 153           break;
 154
 155         case lang_wild_statement_enum:
 156           ret = hook_in_stub (info, &l->wild_statement.children.head);
 157           if (ret)
 158             return ret;
 159           break;
 160
 161         case lang_group_statement_enum:
 162           ret = hook_in_stub (info, &l->group_statement.children.head);
 163           if (ret)
 164             return ret;
 165           break;
 166
 167         case lang_input_section_enum:
 168           if (l->input_section.section == info->input_section)
 169             {
 170               /* We've found our section.  Insert the stub immediately
 171                  after its associated input section.  */
 172               *(info->add.tail) = l->header.next;
 173               l->header.next = info->add.head;
 174               return TRUE;
 175             }
 176           break;
 177
 178         case lang_data_statement_enum:
 179         case lang_reloc_statement_enum:
 180         case lang_object_symbols_statement_enum:
 181         case lang_output_statement_enum:
 182         case lang_target_statement_enum:
 183         case lang_input_statement_enum:
 184         case lang_assignment_statement_enum:
 185         case lang_padding_statement_enum:
 186         case lang_address_statement_enum:
 187         case lang_fill_statement_enum:
 188           break;
 189
 190         default:
 191           FAIL ();
 192           break;
 193         }
 194     }
 195   return FALSE;
 196 }
 197
 198
 199 /* Call-back for elf32_arm_size_stubs.  */
 200
 201 /* Create a new stub section, and arrange for it to be linked
 202    immediately after INPUT_SECTION.  */
 203
 204 static asection *
 205 elf32_arm_add_stub_section (const char * stub_sec_name,
 206                             asection *   input_section,
 207                             unsigned int alignment_power)
 208 {
 209   asection *stub_sec;
 210   flagword flags;
 211   asection *output_section;
 212   lang_output_section_statement_type *os;
 213   struct hook_stub_info info;
 214
 215   flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE
 216            | SEC_HAS_CONTENTS | SEC_RELOC | SEC_IN_MEMORY | SEC_KEEP);
 217   stub_sec = bfd_make_section_anyway_with_flags (stub_file->the_bfd,
 218                                                  stub_sec_name, flags);
 219   if (stub_sec == NULL)
 220     goto err_ret;
 221
 222   bfd_set_section_alignment (stub_file->the_bfd, stub_sec, alignment_power);
 223
 224   output_section = input_section->output_section;
 225   os = lang_output_section_get (output_section);
 226
 227   info.input_section = input_section;
 228   lang_list_init (&info.add);
 229   lang_add_section (&info.add, stub_sec, NULL, os);
 230
 231   if (info.add.head == NULL)
 232     goto err_ret;
 233
 234   if (hook_in_stub (&info, &os->children.head))
 235     return stub_sec;
 236
 237  err_ret:
 238   einfo ("%X%P: can not make stub section: %E\n");
 239   return NULL;
 240 }
 241
 242 /* Another call-back for elf_arm_size_stubs.  */
 243
 244 static void
 245 gldarm_layout_sections_again (void)
 246 {
 247   /* If we have changed sizes of the stub sections, then we need
 248      to recalculate all the section offsets.  This may mean we need to
 249      add even more stubs.  */
 250   gld${EMULATION_NAME}_map_segments (TRUE);
 251   need_laying_out = -1;
 252 }
 253
 254 static void
 255 build_section_lists (lang_statement_union_type *statement)
 256 {
 257   if (statement->header.type == lang_input_section_enum)
 258     {
 259       asection *i = statement->input_section.section;
 260
 261       if (i->sec_info_type != SEC_INFO_TYPE_JUST_SYMS
 262           && (i->flags & SEC_EXCLUDE) == 0
 263           && i->output_section != NULL
 264           && i->output_section->owner == link_info.output_bfd)
 265         elf32_arm_next_input_section (& link_info, i);
 266     }
 267 }
 268
 269 static int
 270 compare_output_sec_vma (const void *a, const void *b)
 271 {
 272   asection *asec = *(asection **) a, *bsec = *(asection **) b;
 273   asection *aout = asec->output_section, *bout = bsec->output_section;
 274   bfd_vma avma, bvma;
 275
 276   /* If there's no output section for some reason, compare equal.  */
 277   if (!aout || !bout)
 278     return 0;
 279
 280   avma = aout->vma + asec->output_offset;
 281   bvma = bout->vma + bsec->output_offset;
 282
 283   if (avma > bvma)
 284     return 1;
 285   else if (avma < bvma)
 286     return -1;
 287
 288   return 0;
 289 }
 290
 291 static void
 292 gld${EMULATION_NAME}_after_allocation (void)
 293 {
 294   int ret;
 295
 296   /* Build a sorted list of input text sections, then use that to process
 297      the unwind table index.  */
 298   unsigned int list_size = 10;
 299   asection **sec_list = (asection **)
 300       xmalloc (list_size * sizeof (asection *));
 301   unsigned int sec_count = 0;
 302
 303   LANG_FOR_EACH_INPUT_STATEMENT (is)
 304     {
 305       bfd *abfd = is->the_bfd;
 306       asection *sec;
 307
 308       if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0)
 309         continue;
 310
 311       for (sec = abfd->sections; sec != NULL; sec = sec->next)
 312         {
 313           asection *out_sec = sec->output_section;
 314
 315           if (out_sec
 316               && elf_section_data (sec)
 317               && elf_section_type (sec) == SHT_PROGBITS
 318               && (elf_section_flags (sec) & SHF_EXECINSTR) != 0
 319               && (sec->flags & SEC_EXCLUDE) == 0
 320               && sec->sec_info_type != SEC_INFO_TYPE_JUST_SYMS
 321               && out_sec != bfd_abs_section_ptr)
 322             {
 323               if (sec_count == list_size)
 324                 {
 325                   list_size *= 2;
 326                   sec_list = (asection **)
 327                       xrealloc (sec_list, list_size * sizeof (asection *));
 328                 }
 329
 330               sec_list[sec_count++] = sec;
 331             }
 332         }
 333     }
 334
 335   qsort (sec_list, sec_count, sizeof (asection *), &compare_output_sec_vma);
 336
 337   if (elf32_arm_fix_exidx_coverage (sec_list, sec_count, &link_info,
 338                                     merge_exidx_entries))
 339     need_laying_out = 1;
 340
 341   free (sec_list);
 342
 343   /* bfd_elf32_discard_info just plays with debugging sections,
 344      ie. doesn't affect any code, so we can delay resizing the
 345      sections.  It's likely we'll resize everything in the process of
 346      adding stubs.  */
 347   ret = bfd_elf_discard_info (link_info.output_bfd, & link_info);
 348   if (ret < 0)
 349     {
 350       einfo ("%X%P: .eh_frame/.stab edit: %E\n");
 351       return;
 352     }
 353   else if (ret > 0)
 354     need_laying_out = 1;
 355
 356   /* If generating a relocatable output file, then we don't
 357      have to examine the relocs.  */
 358   if (stub_file != NULL && !bfd_link_relocatable (&link_info))
 359     {
 360       ret = elf32_arm_setup_section_lists (link_info.output_bfd, &link_info);
 361       if (ret != 0)
 362         {
 363           if (ret < 0)
 364             {
 365               einfo ("%X%P: could not compute sections lists for stub generation: %E\n");
 366               return;
 367             }
 368
 369           lang_for_each_statement (build_section_lists);
 370
 371           /* Call into the BFD backend to do the real work.  */
 372           if (! elf32_arm_size_stubs (link_info.output_bfd,
 373                                       stub_file->the_bfd,
 374                                       & link_info,
 375                                       group_size,
 376                                       & elf32_arm_add_stub_section,
 377                                       & gldarm_layout_sections_again))
 378             {
 379               einfo ("%X%P: cannot size stub section: %E\n");
 380               return;
 381             }
 382         }
 383     }
 384
 385   if (need_laying_out != -1)
 386     gld${EMULATION_NAME}_map_segments (need_laying_out);
 387 }
 388
 389 static void
 390 gld${EMULATION_NAME}_finish (void)
 391 {
 392   struct bfd_link_hash_entry * h;
 393
 394   {
 395     LANG_FOR_EACH_INPUT_STATEMENT (is)
 396       {
 397         /* Figure out where VFP11 erratum veneers (and the labels returning
 398            from same) have been placed.  */
 399         bfd_elf32_arm_vfp11_fix_veneer_locations (is->the_bfd, &link_info);
 400
 401          /* Figure out where STM32L4XX erratum veneers (and the labels returning
 402            from them) have been placed.  */
 403         bfd_elf32_arm_stm32l4xx_fix_veneer_locations (is->the_bfd, &link_info);
 404       }
 405   }
 406
 407   if (!bfd_link_relocatable (&link_info))
 408     {
 409       /* Now build the linker stubs.  */
 410       if (stub_file->the_bfd->sections != NULL)
 411         {
 412           if (! elf32_arm_build_stubs (& link_info))
 413             einfo ("%X%P: can not build stubs: %E\n");
 414         }
 415     }
 416
 417   finish_default ();
 418
 419   if (thumb_entry_symbol)
 420     {
 421       h = bfd_link_hash_lookup (link_info.hash, thumb_entry_symbol,
 422                                 FALSE, FALSE, TRUE);
 423     }
 424   else
 425     {
 426       struct elf_link_hash_entry * eh;
 427
 428       if (!entry_symbol.name)
 429         return;
 430
 431       h = bfd_link_hash_lookup (link_info.hash, entry_symbol.name,
 432                                 FALSE, FALSE, TRUE);
 433       eh = (struct elf_link_hash_entry *)h;
 434       if (!h || eh->target_internal != ST_BRANCH_TO_THUMB)
 435         return;
 436     }
 437
 438
 439   if (h != (struct bfd_link_hash_entry *) NULL
 440       && (h->type == bfd_link_hash_defined
 441           || h->type == bfd_link_hash_defweak)
 442       && h->u.def.section->output_section != NULL)
 443     {
 444       static char buffer[32];
 445       bfd_vma val;
 446
 447       /* Special procesing is required for a Thumb entry symbol.  The
 448          bottom bit of its address must be set.  */
 449       val = (h->u.def.value
 450              + bfd_get_section_vma (link_info.output_bfd,
 451                                     h->u.def.section->output_section)
 452              + h->u.def.section->output_offset);
 453
 454       val |= 1;
 455
 456       /* Now convert this value into a string and store it in entry_symbol
 457          where the lang_finish() function will pick it up.  */
 458       buffer[0] = '0';
 459       buffer[1] = 'x';
 460
 461       sprintf_vma (buffer + 2, val);
 462
 463       if (thumb_entry_symbol != NULL && entry_symbol.name != NULL
 464           && entry_from_cmdline)
 465         einfo (_("%P: warning: '--thumb-entry %s' is overriding '-e %s'\n"),
 466                thumb_entry_symbol, entry_symbol.name);
 467       entry_symbol.name = buffer;
 468     }
 469   else
 470     einfo (_("%P: warning: cannot find thumb start symbol %s\n"),
 471            thumb_entry_symbol);
 472 }
 473
 474 /* This is a convenient point to tell BFD about target specific flags.
 475    After the output has been created, but before inputs are read.  */
 476 static void
 477 arm_elf_create_output_section_statements (void)
 478 {
 479   if (strstr (bfd_get_target (link_info.output_bfd), "arm") == NULL)
 480     {
 481       /* The arm backend needs special fields in the output hash structure.
 482          These will only be created if the output format is an arm format,
 483          hence we do not support linking and changing output formats at the
 484          same time.  Use a link followed by objcopy to change output formats.  */
 485       einfo ("%F%X%P: error: Cannot change output format whilst linking ARM binaries.\n");
 486       return;
 487     }
 488
 489   bfd_elf32_arm_set_target_relocs (link_info.output_bfd, &link_info,
 490                                    target1_is_rel,
 491                                    target2_type, fix_v4bx, use_blx,
 492                                    vfp11_denorm_fix, stm32l4xx_fix,
 493                                    no_enum_size_warning,
 494                                    no_wchar_size_warning,
 495                                    pic_veneer, fix_cortex_a8,
 496                                    fix_arm1176);
 497
 498   stub_file = lang_add_input_file ("linker stubs",
 499                                    lang_input_file_is_fake_enum,
 500                                    NULL);
 501   stub_file->the_bfd = bfd_create ("linker stubs", link_info.output_bfd);
 502   if (stub_file->the_bfd == NULL
 503       || ! bfd_set_arch_mach (stub_file->the_bfd,
 504                               bfd_get_arch (link_info.output_bfd),
 505                               bfd_get_mach (link_info.output_bfd)))
 506     {
 507       einfo ("%X%P: can not create BFD %E\n");
 508       return;
 509     }
 510
 511   stub_file->the_bfd->flags |= BFD_LINKER_CREATED;
 512   ldlang_add_file (stub_file);
 513
 514   /* Also use the stub file for stubs placed in a single output section.  */
 515   bfd_elf32_arm_add_glue_sections_to_bfd (stub_file->the_bfd, &link_info);
 516   bfd_elf32_arm_get_bfd_for_interworking (stub_file->the_bfd, &link_info);
 517 }
 518
 519 /* Avoid processing the fake stub_file in vercheck, stat_needed and
 520    check_needed routines.  */
 521
 522 static void (*real_func) (lang_input_statement_type *);
 523
 524 static void arm_for_each_input_file_wrapper (lang_input_statement_type *l)
 525 {
 526   if (l != stub_file)
 527     (*real_func) (l);
 528 }
 529
 530 static void
 531 arm_lang_for_each_input_file (void (*func) (lang_input_statement_type *))
 532 {
 533   real_func = func;
 534   lang_for_each_input_file (&arm_for_each_input_file_wrapper);
 535 }
 536
 537 #define lang_for_each_input_file arm_lang_for_each_input_file
 538
 539 EOF
 540
 541 # Define some shell vars to insert bits of code into the standard elf
 542 # parse_args and list_options functions.
 543 #
 544 PARSE_AND_LIST_PROLOGUE='
 545 #define OPTION_THUMB_ENTRY              301
 546 #define OPTION_BE8                      302
 547 #define OPTION_TARGET1_REL              303
 548 #define OPTION_TARGET1_ABS              304
 549 #define OPTION_TARGET2                  305
 550 #define OPTION_FIX_V4BX                 306
 551 #define OPTION_USE_BLX                  307
 552 #define OPTION_VFP11_DENORM_FIX         308
 553 #define OPTION_NO_ENUM_SIZE_WARNING     309
 554 #define OPTION_PIC_VENEER               310
 555 #define OPTION_FIX_V4BX_INTERWORKING    311
 556 #define OPTION_STUBGROUP_SIZE           312
 557 #define OPTION_NO_WCHAR_SIZE_WARNING    313
 558 #define OPTION_FIX_CORTEX_A8            314
 559 #define OPTION_NO_FIX_CORTEX_A8         315
 560 #define OPTION_NO_MERGE_EXIDX_ENTRIES   316
 561 #define OPTION_FIX_ARM1176              317
 562 #define OPTION_NO_FIX_ARM1176           318
 563 #define OPTION_LONG_PLT                 319
 564 #define OPTION_STM32L4XX_FIX            320
 565 '
 566
 567 PARSE_AND_LIST_SHORTOPTS=p
 568
 569 PARSE_AND_LIST_LONGOPTS='
 570   { "no-pipeline-knowledge", no_argument, NULL, '\'p\''},
 571   { "thumb-entry", required_argument, NULL, OPTION_THUMB_ENTRY},
 572   { "be8", no_argument, NULL, OPTION_BE8},
 573   { "target1-rel", no_argument, NULL, OPTION_TARGET1_REL},
 574   { "target1-abs", no_argument, NULL, OPTION_TARGET1_ABS},
 575   { "target2", required_argument, NULL, OPTION_TARGET2},
 576   { "fix-v4bx", no_argument, NULL, OPTION_FIX_V4BX},
 577   { "fix-v4bx-interworking", no_argument, NULL, OPTION_FIX_V4BX_INTERWORKING},
 578   { "use-blx", no_argument, NULL, OPTION_USE_BLX},
 579   { "vfp11-denorm-fix", required_argument, NULL, OPTION_VFP11_DENORM_FIX},
 580   { "fix-stm32l4xx-629360", optional_argument, NULL, OPTION_STM32L4XX_FIX},
 581   { "no-enum-size-warning", no_argument, NULL, OPTION_NO_ENUM_SIZE_WARNING},
 582   { "pic-veneer", no_argument, NULL, OPTION_PIC_VENEER},
 583   { "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE },
 584   { "no-wchar-size-warning", no_argument, NULL, OPTION_NO_WCHAR_SIZE_WARNING},
 585   { "fix-cortex-a8", no_argument, NULL, OPTION_FIX_CORTEX_A8 },
 586   { "no-fix-cortex-a8", no_argument, NULL, OPTION_NO_FIX_CORTEX_A8 },
 587   { "no-merge-exidx-entries", no_argument, NULL, OPTION_NO_MERGE_EXIDX_ENTRIES },
 588   { "fix-arm1176", no_argument, NULL, OPTION_FIX_ARM1176 },
 589   { "no-fix-arm1176", no_argument, NULL, OPTION_NO_FIX_ARM1176 },
 590   { "long-plt", no_argument, NULL, OPTION_LONG_PLT },
 591 '
 592
 593 PARSE_AND_LIST_OPTIONS='
 594   fprintf (file, _("  --thumb-entry=<sym>         Set the entry point to be Thumb symbol <sym>\n"));
 595   fprintf (file, _("  --be8                       Output BE8 format image\n"));
 596   fprintf (file, _("  --target1-rel               Interpret R_ARM_TARGET1 as R_ARM_REL32\n"));
 597   fprintf (file, _("  --target1-abs               Interpret R_ARM_TARGET1 as R_ARM_ABS32\n"));
 598   fprintf (file, _("  --target2=<type>            Specify definition of R_ARM_TARGET2\n"));
 599   fprintf (file, _("  --fix-v4bx                  Rewrite BX rn as MOV pc, rn for ARMv4\n"));
 600   fprintf (file, _("  --fix-v4bx-interworking     Rewrite BX rn branch to ARMv4 interworking veneer\n"));
 601   fprintf (file, _("  --use-blx                   Enable use of BLX instructions\n"));
 602   fprintf (file, _("  --vfp11-denorm-fix          Specify how to fix VFP11 denorm erratum\n"));
 603   fprintf (file, _("  --fix-stm32l4xx-629360      Specify how to fix STM32L4XX 629360 erratum\n"));
 604   fprintf (file, _("  --no-enum-size-warning      Don'\''t warn about objects with incompatible\n"
 605                    "                                enum sizes\n"));
 606   fprintf (file, _("  --no-wchar-size-warning     Don'\''t warn about objects with incompatible\n"
 607                    "                                wchar_t sizes\n"));
 608   fprintf (file, _("  --pic-veneer                Always generate PIC interworking veneers\n"));
 609   fprintf (file, _("  --long-plt                  Generate long .plt entries\n"
 610            "                              to handle large .plt/.got displacements\n"));
 611   fprintf (file, _("\
 612   --stub-group-size=N         Maximum size of a group of input sections that\n\
 613                                can be handled by one stub section.  A negative\n\
 614                                value locates all stubs after their branches\n\
 615                                (with a group size of -N), while a positive\n\
 616                                value allows two groups of input sections, one\n\
 617                                before, and one after each stub section.\n\
 618                                Values of +/-1 indicate the linker should\n\
 619                                choose suitable defaults.\n"));
 620   fprintf (file, _("  --[no-]fix-cortex-a8        Disable/enable Cortex-A8 Thumb-2 branch erratum fix\n"));
 621   fprintf (file, _("  --no-merge-exidx-entries    Disable merging exidx entries\n"));
 622   fprintf (file, _("  --[no-]fix-arm1176          Disable/enable ARM1176 BLX immediate erratum fix\n"));
 623 '
 624
 625 PARSE_AND_LIST_ARGS_CASES='
 626     case '\'p\'':
 627       /* Only here for backwards compatibility.  */
 628       break;
 629
 630     case OPTION_THUMB_ENTRY:
 631       thumb_entry_symbol = optarg;
 632       break;
 633
 634     case OPTION_BE8:
 635       byteswap_code = 1;
 636       break;
 637
 638     case OPTION_TARGET1_REL:
 639       target1_is_rel = 1;
 640       break;
 641
 642     case OPTION_TARGET1_ABS:
 643       target1_is_rel = 0;
 644       break;
 645
 646     case OPTION_TARGET2:
 647       target2_type = optarg;
 648       break;
 649
 650     case OPTION_FIX_V4BX:
 651       fix_v4bx = 1;
 652       break;
 653
 654     case OPTION_FIX_V4BX_INTERWORKING:
 655       fix_v4bx = 2;
 656       break;
 657
 658     case OPTION_USE_BLX:
 659       use_blx = 1;
 660       break;
 661
 662     case OPTION_VFP11_DENORM_FIX:
 663       if (strcmp (optarg, "none") == 0)
 664         vfp11_denorm_fix = BFD_ARM_VFP11_FIX_NONE;
 665       else if (strcmp (optarg, "scalar") == 0)
 666         vfp11_denorm_fix = BFD_ARM_VFP11_FIX_SCALAR;
 667       else if (strcmp (optarg, "vector") == 0)
 668         vfp11_denorm_fix = BFD_ARM_VFP11_FIX_VECTOR;
 669       else
 670         einfo (_("Unrecognized VFP11 fix type '\''%s'\''.\n"), optarg);
 671       break;
 672
 673     case OPTION_STM32L4XX_FIX:
 674       if (!optarg)
 675         stm32l4xx_fix = BFD_ARM_STM32L4XX_FIX_DEFAULT;
 676       else if (strcmp (optarg, "none") == 0)
 677         stm32l4xx_fix = BFD_ARM_STM32L4XX_FIX_NONE;
 678       else if (strcmp (optarg, "default") == 0)
 679         stm32l4xx_fix = BFD_ARM_STM32L4XX_FIX_DEFAULT;
 680       else if (strcmp (optarg, "all") == 0)
 681         stm32l4xx_fix = BFD_ARM_STM32L4XX_FIX_ALL;
 682       else
 683         einfo (_("Unrecognized STM32L4XX fix type '\''%s'\''.\n"), optarg);
 684       break;
 685
 686     case OPTION_NO_ENUM_SIZE_WARNING:
 687       no_enum_size_warning = 1;
 688       break;
 689
 690     case OPTION_NO_WCHAR_SIZE_WARNING:
 691       no_wchar_size_warning = 1;
 692       break;
 693
 694     case OPTION_PIC_VENEER:
 695       pic_veneer = 1;
 696       break;
 697
 698     case OPTION_STUBGROUP_SIZE:
 699       {
 700         const char *end;
 701
 702         group_size = bfd_scan_vma (optarg, &end, 0);
 703         if (*end)
 704           einfo (_("%P%F: invalid number `%s'\''\n"), optarg);
 705       }
 706       break;
 707
 708     case OPTION_FIX_CORTEX_A8:
 709       fix_cortex_a8 = 1;
 710       break;
 711
 712     case OPTION_NO_FIX_CORTEX_A8:
 713       fix_cortex_a8 = 0;
 714       break;
 715
 716    case OPTION_NO_MERGE_EXIDX_ENTRIES:
 717       merge_exidx_entries = 0;
 718       break;
 719
 720    case OPTION_FIX_ARM1176:
 721       fix_arm1176 = 1;
 722       break;
 723
 724    case OPTION_NO_FIX_ARM1176:
 725       fix_arm1176 = 0;
 726       break;
 727
 728    case OPTION_LONG_PLT:
 729       bfd_elf32_arm_use_long_plt ();
 730       break;
 731 '
 732
 733 # We have our own before_allocation etc. functions, but they call
 734 # the standard routines, so give them a different name.
 735 LDEMUL_BEFORE_ALLOCATION=arm_elf_before_allocation
 736 LDEMUL_AFTER_ALLOCATION=gld${EMULATION_NAME}_after_allocation
 737 LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=arm_elf_create_output_section_statements
 738
 739 # Replace the elf before_parse function with our own.
 740 LDEMUL_BEFORE_PARSE=gld"${EMULATION_NAME}"_before_parse
 741 LDEMUL_SET_SYMBOLS=gld"${EMULATION_NAME}"_set_symbols
 742
 743 # Call the extra arm-elf function
 744 LDEMUL_FINISH=gld${EMULATION_NAME}_finish