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 = "${TARGET2_TYPE}";
  35 static int fix_v4bx = 0;
  36 static int use_blx = 0;
  37 static bfd_arm_vfp11_fix vfp11_denorm_fix = BFD_ARM_VFP11_FIX_DEFAULT;
  38 static bfd_arm_stm32l4xx_fix stm32l4xx_fix = BFD_ARM_STM32L4XX_FIX_NONE;
  39 static int fix_cortex_a8 = -1;
  40 static int no_enum_size_warning = 0;
  41 static int no_wchar_size_warning = 0;
  42 static int pic_veneer = 0;
  43 static int merge_exidx_entries = -1;
  44 static int fix_arm1176 = 1;
  45
  46 static void
  47 gld${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 *   output_section,
 207                             asection *   after_input_section,
 208                             unsigned int alignment_power)
 209 {
 210   asection *stub_sec;
 211   flagword flags;
 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   os = lang_output_section_get (output_section);
 225
 226   info.input_section = after_input_section;
 227   lang_list_init (&info.add);
 228   lang_add_section (&info.add, stub_sec, NULL, os);
 229
 230   if (info.add.head == NULL)
 231     goto err_ret;
 232
 233   if (after_input_section == NULL)
 234     {
 235       lang_statement_union_type **lp = &os->children.head;
 236       lang_statement_union_type *l, *lprev = NULL;
 237
 238       for (; (l = *lp) != NULL; lp = &l->header.next, lprev = l);
 239
 240       if (lprev)
 241         lprev->header.next = info.add.head;
 242       else
 243         os->children.head = info.add.head;
 244
 245       return stub_sec;
 246     }
 247   else
 248     {
 249       if (hook_in_stub (&info, &os->children.head))
 250         return stub_sec;
 251     }
 252
 253  err_ret:
 254   einfo ("%X%P: can not make stub section: %E\n");
 255   return NULL;
 256 }
 257
 258 /* Another call-back for elf_arm_size_stubs.  */
 259
 260 static void
 261 gldarm_layout_sections_again (void)
 262 {
 263   /* If we have changed sizes of the stub sections, then we need
 264      to recalculate all the section offsets.  This may mean we need to
 265      add even more stubs.  */
 266   gld${EMULATION_NAME}_map_segments (TRUE);
 267   need_laying_out = -1;
 268 }
 269
 270 static void
 271 build_section_lists (lang_statement_union_type *statement)
 272 {
 273   if (statement->header.type == lang_input_section_enum)
 274     {
 275       asection *i = statement->input_section.section;
 276
 277       if (i->sec_info_type != SEC_INFO_TYPE_JUST_SYMS
 278           && (i->flags & SEC_EXCLUDE) == 0
 279           && i->output_section != NULL
 280           && i->output_section->owner == link_info.output_bfd)
 281         elf32_arm_next_input_section (& link_info, i);
 282     }
 283 }
 284
 285 static int
 286 compare_output_sec_vma (const void *a, const void *b)
 287 {
 288   asection *asec = *(asection **) a, *bsec = *(asection **) b;
 289   asection *aout = asec->output_section, *bout = bsec->output_section;
 290   bfd_vma avma, bvma;
 291
 292   /* If there's no output section for some reason, compare equal.  */
 293   if (!aout || !bout)
 294     return 0;
 295
 296   avma = aout->vma + asec->output_offset;
 297   bvma = bout->vma + bsec->output_offset;
 298
 299   if (avma > bvma)
 300     return 1;
 301   else if (avma < bvma)
 302     return -1;
 303
 304   return 0;
 305 }
 306
 307 static void
 308 gld${EMULATION_NAME}_after_allocation (void)
 309 {
 310   int ret;
 311
 312   /* Build a sorted list of input text sections, then use that to process
 313      the unwind table index.  */
 314   unsigned int list_size = 10;
 315   asection **sec_list = (asection **)
 316       xmalloc (list_size * sizeof (asection *));
 317   unsigned int sec_count = 0;
 318
 319   LANG_FOR_EACH_INPUT_STATEMENT (is)
 320     {
 321       bfd *abfd = is->the_bfd;
 322       asection *sec;
 323
 324       if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0)
 325         continue;
 326
 327       for (sec = abfd->sections; sec != NULL; sec = sec->next)
 328         {
 329           asection *out_sec = sec->output_section;
 330
 331           if (out_sec
 332               && elf_section_data (sec)
 333               && elf_section_type (sec) == SHT_PROGBITS
 334               && (elf_section_flags (sec) & SHF_EXECINSTR) != 0
 335               && (sec->flags & SEC_EXCLUDE) == 0
 336               && sec->sec_info_type != SEC_INFO_TYPE_JUST_SYMS
 337               && out_sec != bfd_abs_section_ptr)
 338             {
 339               if (sec_count == list_size)
 340                 {
 341                   list_size *= 2;
 342                   sec_list = (asection **)
 343                       xrealloc (sec_list, list_size * sizeof (asection *));
 344                 }
 345
 346               sec_list[sec_count++] = sec;
 347             }
 348         }
 349     }
 350
 351   qsort (sec_list, sec_count, sizeof (asection *), &compare_output_sec_vma);
 352
 353   if (elf32_arm_fix_exidx_coverage (sec_list, sec_count, &link_info,
 354                                     merge_exidx_entries))
 355     need_laying_out = 1;
 356
 357   free (sec_list);
 358
 359   /* bfd_elf32_discard_info just plays with debugging sections,
 360      ie. doesn't affect any code, so we can delay resizing the
 361      sections.  It's likely we'll resize everything in the process of
 362      adding stubs.  */
 363   ret = bfd_elf_discard_info (link_info.output_bfd, & link_info);
 364   if (ret < 0)
 365     {
 366       einfo ("%X%P: .eh_frame/.stab edit: %E\n");
 367       return;
 368     }
 369   else if (ret > 0)
 370     need_laying_out = 1;
 371
 372   /* If generating a relocatable output file, then we don't
 373      have to examine the relocs.  */
 374   if (stub_file != NULL && !bfd_link_relocatable (&link_info))
 375     {
 376       ret = elf32_arm_setup_section_lists (link_info.output_bfd, &link_info);
 377       if (ret != 0)
 378         {
 379           if (ret < 0)
 380             {
 381               einfo ("%X%P: could not compute sections lists for stub generation: %E\n");
 382               return;
 383             }
 384
 385           lang_for_each_statement (build_section_lists);
 386
 387           /* Call into the BFD backend to do the real work.  */
 388           if (! elf32_arm_size_stubs (link_info.output_bfd,
 389                                       stub_file->the_bfd,
 390                                       & link_info,
 391                                       group_size,
 392                                       & elf32_arm_add_stub_section,
 393                                       & gldarm_layout_sections_again))
 394             {
 395               einfo ("%X%P: cannot size stub section: %E\n");
 396               return;
 397             }
 398         }
 399     }
 400
 401   if (need_laying_out != -1)
 402     gld${EMULATION_NAME}_map_segments (need_laying_out);
 403 }
 404
 405 static void
 406 gld${EMULATION_NAME}_finish (void)
 407 {
 408   struct bfd_link_hash_entry * h;
 409
 410   {
 411     LANG_FOR_EACH_INPUT_STATEMENT (is)
 412       {
 413         /* Figure out where VFP11 erratum veneers (and the labels returning
 414            from same) have been placed.  */
 415         bfd_elf32_arm_vfp11_fix_veneer_locations (is->the_bfd, &link_info);
 416
 417          /* Figure out where STM32L4XX erratum veneers (and the labels returning
 418            from them) have been placed.  */
 419         bfd_elf32_arm_stm32l4xx_fix_veneer_locations (is->the_bfd, &link_info);
 420       }
 421   }
 422
 423   if (!bfd_link_relocatable (&link_info))
 424     {
 425       /* Now build the linker stubs.  */
 426       if (stub_file->the_bfd->sections != NULL)
 427         {
 428           if (! elf32_arm_build_stubs (& link_info))
 429             einfo ("%X%P: can not build stubs: %E\n");
 430         }
 431     }
 432
 433   finish_default ();
 434
 435   if (thumb_entry_symbol)
 436     {
 437       h = bfd_link_hash_lookup (link_info.hash, thumb_entry_symbol,
 438                                 FALSE, FALSE, TRUE);
 439     }
 440   else
 441     {
 442       struct elf_link_hash_entry * eh;
 443
 444       if (!entry_symbol.name)
 445         return;
 446
 447       h = bfd_link_hash_lookup (link_info.hash, entry_symbol.name,
 448                                 FALSE, FALSE, TRUE);
 449       eh = (struct elf_link_hash_entry *)h;
 450       if (!h || ARM_GET_SYM_BRANCH_TYPE (eh->target_internal)
 451                 != ST_BRANCH_TO_THUMB)
 452         return;
 453     }
 454
 455
 456   if (h != (struct bfd_link_hash_entry *) NULL
 457       && (h->type == bfd_link_hash_defined
 458           || h->type == bfd_link_hash_defweak)
 459       && h->u.def.section->output_section != NULL)
 460     {
 461       static char buffer[32];
 462       bfd_vma val;
 463
 464       /* Special procesing is required for a Thumb entry symbol.  The
 465          bottom bit of its address must be set.  */
 466       val = (h->u.def.value
 467              + bfd_get_section_vma (link_info.output_bfd,
 468                                     h->u.def.section->output_section)
 469              + h->u.def.section->output_offset);
 470
 471       val |= 1;
 472
 473       /* Now convert this value into a string and store it in entry_symbol
 474          where the lang_finish() function will pick it up.  */
 475       buffer[0] = '0';
 476       buffer[1] = 'x';
 477
 478       sprintf_vma (buffer + 2, val);
 479
 480       if (thumb_entry_symbol != NULL && entry_symbol.name != NULL
 481           && entry_from_cmdline)
 482         einfo (_("%P: warning: '--thumb-entry %s' is overriding '-e %s'\n"),
 483                thumb_entry_symbol, entry_symbol.name);
 484       entry_symbol.name = buffer;
 485     }
 486   else
 487     einfo (_("%P: warning: cannot find thumb start symbol %s\n"),
 488            thumb_entry_symbol);
 489 }
 490
 491 /* This is a convenient point to tell BFD about target specific flags.
 492    After the output has been created, but before inputs are read.  */
 493 static void
 494 arm_elf_create_output_section_statements (void)
 495 {
 496   if (strstr (bfd_get_target (link_info.output_bfd), "arm") == NULL)
 497     {
 498       /* The arm backend needs special fields in the output hash structure.
 499          These will only be created if the output format is an arm format,
 500          hence we do not support linking and changing output formats at the
 501          same time.  Use a link followed by objcopy to change output formats.  */
 502       einfo ("%F%X%P: error: Cannot change output format whilst linking ARM binaries.\n");
 503       return;
 504     }
 505
 506   bfd_elf32_arm_set_target_relocs (link_info.output_bfd, &link_info,
 507                                    target1_is_rel,
 508                                    target2_type, fix_v4bx, use_blx,
 509                                    vfp11_denorm_fix, stm32l4xx_fix,
 510                                    no_enum_size_warning,
 511                                    no_wchar_size_warning,
 512                                    pic_veneer, fix_cortex_a8,
 513                                    fix_arm1176);
 514
 515   stub_file = lang_add_input_file ("linker stubs",
 516                                    lang_input_file_is_fake_enum,
 517                                    NULL);
 518   stub_file->the_bfd = bfd_create ("linker stubs", link_info.output_bfd);
 519   if (stub_file->the_bfd == NULL
 520       || ! bfd_set_arch_mach (stub_file->the_bfd,
 521                               bfd_get_arch (link_info.output_bfd),
 522                               bfd_get_mach (link_info.output_bfd)))
 523     {
 524       einfo ("%X%P: can not create BFD %E\n");
 525       return;
 526     }
 527
 528   stub_file->the_bfd->flags |= BFD_LINKER_CREATED;
 529   ldlang_add_file (stub_file);
 530
 531   /* Also use the stub file for stubs placed in a single output section.  */
 532   bfd_elf32_arm_add_glue_sections_to_bfd (stub_file->the_bfd, &link_info);
 533   bfd_elf32_arm_get_bfd_for_interworking (stub_file->the_bfd, &link_info);
 534 }
 535
 536 /* Avoid processing the fake stub_file in vercheck, stat_needed and
 537    check_needed routines.  */
 538
 539 static void (*real_func) (lang_input_statement_type *);
 540
 541 static void arm_for_each_input_file_wrapper (lang_input_statement_type *l)
 542 {
 543   if (l != stub_file)
 544     (*real_func) (l);
 545 }
 546
 547 static void
 548 arm_lang_for_each_input_file (void (*func) (lang_input_statement_type *))
 549 {
 550   real_func = func;
 551   lang_for_each_input_file (&arm_for_each_input_file_wrapper);
 552 }
 553
 554 #define lang_for_each_input_file arm_lang_for_each_input_file
 555
 556 EOF
 557
 558 # Define some shell vars to insert bits of code into the standard elf
 559 # parse_args and list_options functions.
 560 #
 561 PARSE_AND_LIST_PROLOGUE='
 562 #define OPTION_THUMB_ENTRY              301
 563 #define OPTION_BE8                      302
 564 #define OPTION_TARGET1_REL              303
 565 #define OPTION_TARGET1_ABS              304
 566 #define OPTION_TARGET2                  305
 567 #define OPTION_FIX_V4BX                 306
 568 #define OPTION_USE_BLX                  307
 569 #define OPTION_VFP11_DENORM_FIX         308
 570 #define OPTION_NO_ENUM_SIZE_WARNING     309
 571 #define OPTION_PIC_VENEER               310
 572 #define OPTION_FIX_V4BX_INTERWORKING    311
 573 #define OPTION_STUBGROUP_SIZE           312
 574 #define OPTION_NO_WCHAR_SIZE_WARNING    313
 575 #define OPTION_FIX_CORTEX_A8            314
 576 #define OPTION_NO_FIX_CORTEX_A8         315
 577 #define OPTION_NO_MERGE_EXIDX_ENTRIES   316
 578 #define OPTION_FIX_ARM1176              317
 579 #define OPTION_NO_FIX_ARM1176           318
 580 #define OPTION_LONG_PLT                 319
 581 #define OPTION_STM32L4XX_FIX            320
 582 '
 583
 584 PARSE_AND_LIST_SHORTOPTS=p
 585
 586 PARSE_AND_LIST_LONGOPTS='
 587   { "no-pipeline-knowledge", no_argument, NULL, '\'p\''},
 588   { "thumb-entry", required_argument, NULL, OPTION_THUMB_ENTRY},
 589   { "be8", no_argument, NULL, OPTION_BE8},
 590   { "target1-rel", no_argument, NULL, OPTION_TARGET1_REL},
 591   { "target1-abs", no_argument, NULL, OPTION_TARGET1_ABS},
 592   { "target2", required_argument, NULL, OPTION_TARGET2},
 593   { "fix-v4bx", no_argument, NULL, OPTION_FIX_V4BX},
 594   { "fix-v4bx-interworking", no_argument, NULL, OPTION_FIX_V4BX_INTERWORKING},
 595   { "use-blx", no_argument, NULL, OPTION_USE_BLX},
 596   { "vfp11-denorm-fix", required_argument, NULL, OPTION_VFP11_DENORM_FIX},
 597   { "fix-stm32l4xx-629360", optional_argument, NULL, OPTION_STM32L4XX_FIX},
 598   { "no-enum-size-warning", no_argument, NULL, OPTION_NO_ENUM_SIZE_WARNING},
 599   { "pic-veneer", no_argument, NULL, OPTION_PIC_VENEER},
 600   { "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE },
 601   { "no-wchar-size-warning", no_argument, NULL, OPTION_NO_WCHAR_SIZE_WARNING},
 602   { "fix-cortex-a8", no_argument, NULL, OPTION_FIX_CORTEX_A8 },
 603   { "no-fix-cortex-a8", no_argument, NULL, OPTION_NO_FIX_CORTEX_A8 },
 604   { "no-merge-exidx-entries", no_argument, NULL, OPTION_NO_MERGE_EXIDX_ENTRIES },
 605   { "fix-arm1176", no_argument, NULL, OPTION_FIX_ARM1176 },
 606   { "no-fix-arm1176", no_argument, NULL, OPTION_NO_FIX_ARM1176 },
 607   { "long-plt", no_argument, NULL, OPTION_LONG_PLT },
 608 '
 609
 610 PARSE_AND_LIST_OPTIONS='
 611   fprintf (file, _("  --thumb-entry=<sym>         Set the entry point to be Thumb symbol <sym>\n"));
 612   fprintf (file, _("  --be8                       Output BE8 format image\n"));
 613   fprintf (file, _("  --target1-rel               Interpret R_ARM_TARGET1 as R_ARM_REL32\n"));
 614   fprintf (file, _("  --target1-abs               Interpret R_ARM_TARGET1 as R_ARM_ABS32\n"));
 615   fprintf (file, _("  --target2=<type>            Specify definition of R_ARM_TARGET2\n"));
 616   fprintf (file, _("  --fix-v4bx                  Rewrite BX rn as MOV pc, rn for ARMv4\n"));
 617   fprintf (file, _("  --fix-v4bx-interworking     Rewrite BX rn branch to ARMv4 interworking veneer\n"));
 618   fprintf (file, _("  --use-blx                   Enable use of BLX instructions\n"));
 619   fprintf (file, _("  --vfp11-denorm-fix          Specify how to fix VFP11 denorm erratum\n"));
 620   fprintf (file, _("  --fix-stm32l4xx-629360      Specify how to fix STM32L4XX 629360 erratum\n"));
 621   fprintf (file, _("  --no-enum-size-warning      Don'\''t warn about objects with incompatible\n"
 622                    "                                enum sizes\n"));
 623   fprintf (file, _("  --no-wchar-size-warning     Don'\''t warn about objects with incompatible\n"
 624                    "                                wchar_t sizes\n"));
 625   fprintf (file, _("  --pic-veneer                Always generate PIC interworking veneers\n"));
 626   fprintf (file, _("  --long-plt                  Generate long .plt entries\n"
 627            "                              to handle large .plt/.got displacements\n"));
 628   fprintf (file, _("\
 629   --stub-group-size=N         Maximum size of a group of input sections that\n\
 630                                can be handled by one stub section.  A negative\n\
 631                                value locates all stubs after their branches\n\
 632                                (with a group size of -N), while a positive\n\
 633                                value allows two groups of input sections, one\n\
 634                                before, and one after each stub section.\n\
 635                                Values of +/-1 indicate the linker should\n\
 636                                choose suitable defaults.\n"));
 637   fprintf (file, _("  --[no-]fix-cortex-a8        Disable/enable Cortex-A8 Thumb-2 branch erratum fix\n"));
 638   fprintf (file, _("  --no-merge-exidx-entries    Disable merging exidx entries\n"));
 639   fprintf (file, _("  --[no-]fix-arm1176          Disable/enable ARM1176 BLX immediate erratum fix\n"));
 640 '
 641
 642 PARSE_AND_LIST_ARGS_CASES='
 643     case '\'p\'':
 644       /* Only here for backwards compatibility.  */
 645       break;
 646
 647     case OPTION_THUMB_ENTRY:
 648       thumb_entry_symbol = optarg;
 649       break;
 650
 651     case OPTION_BE8:
 652       byteswap_code = 1;
 653       break;
 654
 655     case OPTION_TARGET1_REL:
 656       target1_is_rel = 1;
 657       break;
 658
 659     case OPTION_TARGET1_ABS:
 660       target1_is_rel = 0;
 661       break;
 662
 663     case OPTION_TARGET2:
 664       target2_type = optarg;
 665       break;
 666
 667     case OPTION_FIX_V4BX:
 668       fix_v4bx = 1;
 669       break;
 670
 671     case OPTION_FIX_V4BX_INTERWORKING:
 672       fix_v4bx = 2;
 673       break;
 674
 675     case OPTION_USE_BLX:
 676       use_blx = 1;
 677       break;
 678
 679     case OPTION_VFP11_DENORM_FIX:
 680       if (strcmp (optarg, "none") == 0)
 681         vfp11_denorm_fix = BFD_ARM_VFP11_FIX_NONE;
 682       else if (strcmp (optarg, "scalar") == 0)
 683         vfp11_denorm_fix = BFD_ARM_VFP11_FIX_SCALAR;
 684       else if (strcmp (optarg, "vector") == 0)
 685         vfp11_denorm_fix = BFD_ARM_VFP11_FIX_VECTOR;
 686       else
 687         einfo (_("Unrecognized VFP11 fix type '\''%s'\''.\n"), optarg);
 688       break;
 689
 690     case OPTION_STM32L4XX_FIX:
 691       if (!optarg)
 692         stm32l4xx_fix = BFD_ARM_STM32L4XX_FIX_DEFAULT;
 693       else if (strcmp (optarg, "none") == 0)
 694         stm32l4xx_fix = BFD_ARM_STM32L4XX_FIX_NONE;
 695       else if (strcmp (optarg, "default") == 0)
 696         stm32l4xx_fix = BFD_ARM_STM32L4XX_FIX_DEFAULT;
 697       else if (strcmp (optarg, "all") == 0)
 698         stm32l4xx_fix = BFD_ARM_STM32L4XX_FIX_ALL;
 699       else
 700         einfo (_("Unrecognized STM32L4XX fix type '\''%s'\''.\n"), optarg);
 701       break;
 702
 703     case OPTION_NO_ENUM_SIZE_WARNING:
 704       no_enum_size_warning = 1;
 705       break;
 706
 707     case OPTION_NO_WCHAR_SIZE_WARNING:
 708       no_wchar_size_warning = 1;
 709       break;
 710
 711     case OPTION_PIC_VENEER:
 712       pic_veneer = 1;
 713       break;
 714
 715     case OPTION_STUBGROUP_SIZE:
 716       {
 717         const char *end;
 718
 719         group_size = bfd_scan_vma (optarg, &end, 0);
 720         if (*end)
 721           einfo (_("%P%F: invalid number `%s'\''\n"), optarg);
 722       }
 723       break;
 724
 725     case OPTION_FIX_CORTEX_A8:
 726       fix_cortex_a8 = 1;
 727       break;
 728
 729     case OPTION_NO_FIX_CORTEX_A8:
 730       fix_cortex_a8 = 0;
 731       break;
 732
 733    case OPTION_NO_MERGE_EXIDX_ENTRIES:
 734       merge_exidx_entries = 0;
 735       break;
 736
 737    case OPTION_FIX_ARM1176:
 738       fix_arm1176 = 1;
 739       break;
 740
 741    case OPTION_NO_FIX_ARM1176:
 742       fix_arm1176 = 0;
 743       break;
 744
 745    case OPTION_LONG_PLT:
 746       bfd_elf32_arm_use_long_plt ();
 747       break;
 748 '
 749
 750 # We have our own before_allocation etc. functions, but they call
 751 # the standard routines, so give them a different name.
 752 LDEMUL_BEFORE_ALLOCATION=arm_elf_before_allocation
 753 LDEMUL_AFTER_ALLOCATION=gld${EMULATION_NAME}_after_allocation
 754 LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=arm_elf_create_output_section_statements
 755
 756 # Replace the elf before_parse function with our own.
 757 LDEMUL_BEFORE_PARSE=gld"${EMULATION_NAME}"_before_parse
 758 LDEMUL_SET_SYMBOLS=gld"${EMULATION_NAME}"_set_symbols
 759
 760 # Call the extra arm-elf function
 761 LDEMUL_FINISH=gld${EMULATION_NAME}_finish