ld/emultempl/armelf.em

   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, &params);
 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