ld/emultempl/armelf.em

   1 # This shell script emits a C file. -*- C -*-
   2 #   Copyright 1991, 1993, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
   3 #   2004, 2005, 2007, 2008
   4 #   Free Software Foundation, Inc.
   5 #
   6 # This file is part of the GNU Binutils.
   7 #
   8 # This program is free software; you can redistribute it and/or modify
   9 # it under the terms of the GNU General Public License as published by
  10 # the Free Software Foundation; either version 3 of the License, or
  11 # (at your option) any later version.
  12 #
  13 # This program is distributed in the hope that it will be useful,
  14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 # GNU General Public License for more details.
  17 #
  18 # You should have received a copy of the GNU General Public License
  19 # along with this program; if not, write to the Free Software
  20 # Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  21 # MA 02110-1301, USA.
  22 #
  23
  24 # This file is sourced from elf32.em, and defines extra arm-elf
  25 # specific routines.
  26 #
  27 test -z "$TARGET2_TYPE" && TARGET2_TYPE="rel"
  28 fragment <<EOF
  29
  30 #include "ldctor.h"
  31 #include "elf/arm.h"
  32
  33 static char *thumb_entry_symbol = NULL;
  34 static bfd *bfd_for_interwork;
  35 static int byteswap_code = 0;
  36 static int target1_is_rel = 0${TARGET1_IS_REL};
  37 static char *target2_type = "${TARGET2_TYPE}";
  38 static int fix_v4bx = 0;
  39 static int use_blx = 0;
  40 static bfd_arm_vfp11_fix vfp11_denorm_fix = BFD_ARM_VFP11_FIX_DEFAULT;
  41 static int no_enum_size_warning = 0;
  42 static int no_wchar_size_warning = 0;
  43 static int pic_veneer = 0;
  44
  45 static void
  46 gld${EMULATION_NAME}_before_parse (void)
  47 {
  48 #ifndef TARGET_                 /* I.e., if not generic.  */
  49   ldfile_set_output_arch ("`echo ${ARCH}`", bfd_arch_unknown);
  50 #endif /* not TARGET_ */
  51   config.dynamic_link = ${DYNAMIC_LINK-TRUE};
  52   config.has_shared = `if test -n "$GENERATE_SHLIB_SCRIPT" ; then echo TRUE ; else echo FALSE ; fi`;
  53 }
  54
  55 static void
  56 arm_elf_after_open (void)
  57 {
  58   if (strstr (bfd_get_target (link_info.output_bfd), "arm") == NULL)
  59     {
  60       /* The arm backend needs special fields in the output hash structure.
  61          These will only be created if the output format is an arm format,
  62          hence we do not support linking and changing output formats at the
  63          same time.  Use a link followed by objcopy to change output formats.  */
  64       einfo ("%F%X%P: error: cannot change output format whilst linking ARM binaries\n");
  65       return;
  66     }
  67
  68   {
  69     LANG_FOR_EACH_INPUT_STATEMENT (is)
  70       {
  71         bfd_elf32_arm_add_glue_sections_to_bfd (is->the_bfd, & link_info);
  72       }
  73   }
  74
  75   /* Call the standard elf routine.  */
  76   gld${EMULATION_NAME}_after_open ();
  77 }
  78
  79 static void
  80 arm_elf_set_bfd_for_interworking (lang_statement_union_type *statement)
  81 {
  82   if (statement->header.type == lang_input_section_enum)
  83     {
  84       asection *i = statement->input_section.section;
  85
  86       if (!((lang_input_statement_type *) i->owner->usrdata)->just_syms_flag
  87           && (i->flags & SEC_EXCLUDE) == 0)
  88         {
  89           asection *output_section = i->output_section;
  90
  91           ASSERT (output_section->owner == link_info.output_bfd);
  92
  93           /* Don't attach the interworking stubs to a dynamic object, to
  94              an empty section, etc.  */
  95           if ((output_section->flags & SEC_HAS_CONTENTS) != 0
  96               && (i->flags & SEC_NEVER_LOAD) == 0
  97               && ! (i->owner->flags & DYNAMIC))
  98             bfd_for_interwork = i->owner;
  99         }
 100     }
 101 }
 102
 103 static void
 104 arm_elf_before_allocation (void)
 105 {
 106   if (link_info.input_bfds != NULL)
 107     {
 108       /* The interworking bfd must be the last one in the link.  */
 109       bfd_for_interwork = NULL;
 110
 111       lang_for_each_statement (arm_elf_set_bfd_for_interworking);
 112
 113       /* If bfd_for_interwork is NULL, then there are no loadable sections
 114          with real contents to be linked, so we are not going to have to
 115          create any interworking stubs, so it is OK not to call
 116          bfd_elf32_arm_get_bfd_for_interworking.  */
 117       if (bfd_for_interwork != NULL)
 118         bfd_elf32_arm_get_bfd_for_interworking (bfd_for_interwork, &link_info);
 119     }
 120
 121   bfd_elf32_arm_set_byteswap_code (&link_info, byteswap_code);
 122
 123   /* Choose type of VFP11 erratum fix, or warn if specified fix is unnecessary
 124      due to architecture version.  */
 125   bfd_elf32_arm_set_vfp11_fix (link_info.output_bfd, &link_info);
 126
 127   /* We should be able to set the size of the interworking stub section.  We
 128      can't do it until later if we have dynamic sections, though.  */
 129   if (! elf_hash_table (&link_info)->dynamic_sections_created)
 130     {
 131       /* Here we rummage through the found bfds to collect glue information.  */
 132       LANG_FOR_EACH_INPUT_STATEMENT (is)
 133         {
 134           /* Initialise mapping tables for code/data.  */
 135           bfd_elf32_arm_init_maps (is->the_bfd);
 136
 137           if (!bfd_elf32_arm_process_before_allocation (is->the_bfd,
 138                                                         &link_info)
 139               || !bfd_elf32_arm_vfp11_erratum_scan (is->the_bfd, &link_info))
 140             /* xgettext:c-format */
 141             einfo (_("Errors encountered processing file %s"), is->filename);
 142         }
 143     }
 144
 145   /* Call the standard elf routine.  */
 146   gld${EMULATION_NAME}_before_allocation ();
 147
 148   /* We have seen it all. Allocate it, and carry on.  */
 149   bfd_elf32_arm_allocate_interworking_sections (& link_info);
 150 }
 151
 152 static void
 153 arm_elf_after_allocation (void)
 154 {
 155   /* Call the standard elf routine.  */
 156   after_allocation_default ();
 157
 158   {
 159     LANG_FOR_EACH_INPUT_STATEMENT (is)
 160       {
 161         /* Figure out where VFP11 erratum veneers (and the labels returning
 162            from same) have been placed.  */
 163         bfd_elf32_arm_vfp11_fix_veneer_locations (is->the_bfd, &link_info);
 164       }
 165   }
 166 }
 167
 168 /* Fake input file for stubs.  */
 169 static lang_input_statement_type *stub_file;
 170
 171 /* Whether we need to call gldarm_layout_sections_again.  */
 172 static int need_laying_out = 0;
 173
 174 /* Maximum size of a group of input sections that can be handled by
 175    one stub section.  A value of +/-1 indicates the bfd back-end
 176    should use a suitable default size.  */
 177 static bfd_signed_vma group_size = 1;
 178
 179 struct hook_stub_info
 180 {
 181   lang_statement_list_type add;
 182   asection *input_section;
 183 };
 184
 185 /* Traverse the linker tree to find the spot where the stub goes.  */
 186
 187 static bfd_boolean
 188 hook_in_stub (struct hook_stub_info *info, lang_statement_union_type **lp)
 189 {
 190   lang_statement_union_type *l;
 191   bfd_boolean ret;
 192
 193   for (; (l = *lp) != NULL; lp = &l->header.next)
 194     {
 195       switch (l->header.type)
 196         {
 197         case lang_constructors_statement_enum:
 198           ret = hook_in_stub (info, &constructor_list.head);
 199           if (ret)
 200             return ret;
 201           break;
 202
 203         case lang_output_section_statement_enum:
 204           ret = hook_in_stub (info,
 205                               &l->output_section_statement.children.head);
 206           if (ret)
 207             return ret;
 208           break;
 209
 210         case lang_wild_statement_enum:
 211           ret = hook_in_stub (info, &l->wild_statement.children.head);
 212           if (ret)
 213             return ret;
 214           break;
 215
 216         case lang_group_statement_enum:
 217           ret = hook_in_stub (info, &l->group_statement.children.head);
 218           if (ret)
 219             return ret;
 220           break;
 221
 222         case lang_input_section_enum:
 223           if (l->input_section.section == info->input_section)
 224             {
 225               /* We've found our section.  Insert the stub immediately
 226                  before its associated input section.  */
 227               *lp = info->add.head;
 228               *(info->add.tail) = l;
 229               return TRUE;
 230             }
 231           break;
 232
 233         case lang_data_statement_enum:
 234         case lang_reloc_statement_enum:
 235         case lang_object_symbols_statement_enum:
 236         case lang_output_statement_enum:
 237         case lang_target_statement_enum:
 238         case lang_input_statement_enum:
 239         case lang_assignment_statement_enum:
 240         case lang_padding_statement_enum:
 241         case lang_address_statement_enum:
 242         case lang_fill_statement_enum:
 243           break;
 244
 245         default:
 246           FAIL ();
 247           break;
 248         }
 249     }
 250   return FALSE;
 251 }
 252
 253
 254 /* Call-back for elf32_arm_size_stubs.  */
 255
 256 /* Create a new stub section, and arrange for it to be linked
 257    immediately before INPUT_SECTION.  */
 258
 259 static asection *
 260 elf32_arm_add_stub_section (const char *stub_sec_name,
 261                             asection *input_section)
 262 {
 263   asection *stub_sec;
 264   flagword flags;
 265   asection *output_section;
 266   const char *secname;
 267   lang_output_section_statement_type *os;
 268   struct hook_stub_info info;
 269
 270   flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE
 271            | SEC_HAS_CONTENTS | SEC_RELOC | SEC_IN_MEMORY | SEC_KEEP);
 272   stub_sec = bfd_make_section_anyway_with_flags (stub_file->the_bfd,
 273                                                  stub_sec_name, flags);
 274   if (stub_sec == NULL)
 275     goto err_ret;
 276
 277   bfd_set_section_alignment (stub_file->the_bfd, stub_sec, 3);
 278
 279   output_section = input_section->output_section;
 280   secname = bfd_get_section_name (output_section->owner, output_section);
 281   os = lang_output_section_find (secname);
 282
 283   info.input_section = input_section;
 284   lang_list_init (&info.add);
 285   lang_add_section (&info.add, stub_sec, os);
 286
 287   if (info.add.head == NULL)
 288     goto err_ret;
 289
 290   if (hook_in_stub (&info, &os->children.head))
 291     return stub_sec;
 292
 293  err_ret:
 294   einfo ("%X%P: can not make stub section: %E\n");
 295   return NULL;
 296 }
 297
 298 /* Another call-back for elf_arm_size_stubs.  */
 299
 300 static void
 301 gldarm_layout_sections_again (void)
 302 {
 303   /* If we have changed sizes of the stub sections, then we need
 304      to recalculate all the section offsets.  This may mean we need to
 305      add even more stubs.  */
 306   gld${EMULATION_NAME}_map_segments (TRUE);
 307   need_laying_out = -1;
 308 }
 309
 310 static void
 311 build_section_lists (lang_statement_union_type *statement)
 312 {
 313   if (statement->header.type == lang_input_section_enum)
 314     {
 315       asection *i = statement->input_section.section;
 316
 317       if (!((lang_input_statement_type *) i->owner->usrdata)->just_syms_flag
 318           && (i->flags & SEC_EXCLUDE) == 0
 319           && i->output_section != NULL
 320           && i->output_section->owner == link_info.output_bfd)
 321         elf32_arm_next_input_section (& link_info, i);
 322     }
 323 }
 324
 325 static void
 326 gld${EMULATION_NAME}_finish (void)
 327 {
 328   struct bfd_link_hash_entry * h;
 329
 330   /* bfd_elf32_discard_info just plays with debugging sections,
 331      ie. doesn't affect any code, so we can delay resizing the
 332      sections.  It's likely we'll resize everything in the process of
 333      adding stubs.  */
 334   if (bfd_elf_discard_info (link_info.output_bfd, & link_info))
 335     need_laying_out = 1;
 336
 337   /* If generating a relocatable output file, then we don't
 338      have to examine the relocs.  */
 339   if (stub_file != NULL && !link_info.relocatable)
 340     {
 341       int  ret = elf32_arm_setup_section_lists (link_info.output_bfd, & link_info);
 342
 343       if (ret != 0)
 344         {
 345           if (ret < 0)
 346             {
 347               einfo ("%X%P: could not compute sections lists for stub generation: %E\n");
 348               return;
 349             }
 350
 351           lang_for_each_statement (build_section_lists);
 352
 353           /* Call into the BFD backend to do the real work.  */
 354           if (! elf32_arm_size_stubs (link_info.output_bfd,
 355                                       stub_file->the_bfd,
 356                                       & link_info,
 357                                       group_size,
 358                                       & elf32_arm_add_stub_section,
 359                                       & gldarm_layout_sections_again))
 360             {
 361               einfo ("%X%P: cannot size stub section: %E\n");
 362               return;
 363             }
 364         }
 365     }
 366
 367   if (need_laying_out != -1)
 368     gld${EMULATION_NAME}_map_segments (need_laying_out);
 369
 370   if (! link_info.relocatable)
 371     {
 372       /* Now build the linker stubs.  */
 373       if (stub_file->the_bfd->sections != NULL)
 374         {
 375           if (! elf32_arm_build_stubs (& link_info))
 376             einfo ("%X%P: can not build stubs: %E\n");
 377         }
 378     }
 379
 380   finish_default ();
 381
 382   if (thumb_entry_symbol)
 383     {
 384       h = bfd_link_hash_lookup (link_info.hash, thumb_entry_symbol,
 385                                 FALSE, FALSE, TRUE);
 386     }
 387   else
 388     {
 389       struct elf_link_hash_entry * eh;
 390
 391       if (!entry_symbol.name)
 392         return;
 393
 394       h = bfd_link_hash_lookup (link_info.hash, entry_symbol.name,
 395                                 FALSE, FALSE, TRUE);
 396       eh = (struct elf_link_hash_entry *)h;
 397       if (!h || ELF_ST_TYPE(eh->type) != STT_ARM_TFUNC)
 398         return;
 399     }
 400
 401
 402   if (h != (struct bfd_link_hash_entry *) NULL
 403       && (h->type == bfd_link_hash_defined
 404           || h->type == bfd_link_hash_defweak)
 405       && h->u.def.section->output_section != NULL)
 406     {
 407       static char buffer[32];
 408       bfd_vma val;
 409
 410       /* Special procesing is required for a Thumb entry symbol.  The
 411          bottom bit of its address must be set.  */
 412       val = (h->u.def.value
 413              + bfd_get_section_vma (link_info.output_bfd,
 414                                     h->u.def.section->output_section)
 415              + h->u.def.section->output_offset);
 416
 417       val |= 1;
 418
 419       /* Now convert this value into a string and store it in entry_symbol
 420          where the lang_finish() function will pick it up.  */
 421       buffer[0] = '0';
 422       buffer[1] = 'x';
 423
 424       sprintf_vma (buffer + 2, val);
 425
 426       if (thumb_entry_symbol != NULL && entry_symbol.name != NULL
 427           && entry_from_cmdline)
 428         einfo (_("%P: warning: '--thumb-entry %s' is overriding '-e %s'\n"),
 429                thumb_entry_symbol, entry_symbol.name);
 430       entry_symbol.name = buffer;
 431     }
 432   else
 433     einfo (_("%P: warning: cannot find thumb start symbol %s\n"),
 434            thumb_entry_symbol);
 435 }
 436
 437 /* This is a convenient point to tell BFD about target specific flags.
 438    After the output has been created, but before inputs are read.  */
 439 static void
 440 arm_elf_create_output_section_statements (void)
 441 {
 442   bfd_elf32_arm_set_target_relocs (link_info.output_bfd, &link_info,
 443                                    target1_is_rel,
 444                                    target2_type, fix_v4bx, use_blx,
 445                                    vfp11_denorm_fix, no_enum_size_warning,
 446                                    no_wchar_size_warning,
 447                                    pic_veneer);
 448
 449   stub_file = lang_add_input_file ("linker stubs",
 450                                    lang_input_file_is_fake_enum,
 451                                    NULL);
 452   stub_file->the_bfd = bfd_create ("linker stubs", link_info.output_bfd);
 453   if (stub_file->the_bfd == NULL
 454       || ! bfd_set_arch_mach (stub_file->the_bfd,
 455                               bfd_get_arch (link_info.output_bfd),
 456                               bfd_get_mach (link_info.output_bfd)))
 457     {
 458       einfo ("%X%P: can not create BFD %E\n");
 459       return;
 460     }
 461
 462   stub_file->the_bfd->flags |= BFD_LINKER_CREATED;
 463   ldlang_add_file (stub_file);
 464 }
 465
 466 /* Avoid processing the fake stub_file in vercheck, stat_needed and
 467    check_needed routines.  */
 468
 469 static void (*real_func) (lang_input_statement_type *);
 470
 471 static void arm_for_each_input_file_wrapper (lang_input_statement_type *l)
 472 {
 473   if (l != stub_file)
 474     (*real_func) (l);
 475 }
 476
 477 static void
 478 arm_lang_for_each_input_file (void (*func) (lang_input_statement_type *))
 479 {
 480   real_func = func;
 481   lang_for_each_input_file (&arm_for_each_input_file_wrapper);
 482 }
 483
 484 #define lang_for_each_input_file arm_lang_for_each_input_file
 485
 486 EOF
 487
 488 # Define some shell vars to insert bits of code into the standard elf
 489 # parse_args and list_options functions.
 490 #
 491 PARSE_AND_LIST_PROLOGUE='
 492 #define OPTION_THUMB_ENTRY              301
 493 #define OPTION_BE8                      302
 494 #define OPTION_TARGET1_REL              303
 495 #define OPTION_TARGET1_ABS              304
 496 #define OPTION_TARGET2                  305
 497 #define OPTION_FIX_V4BX                 306
 498 #define OPTION_USE_BLX                  307
 499 #define OPTION_VFP11_DENORM_FIX         308
 500 #define OPTION_NO_ENUM_SIZE_WARNING     309
 501 #define OPTION_PIC_VENEER               310
 502 #define OPTION_FIX_V4BX_INTERWORKING    311
 503 #define OPTION_STUBGROUP_SIZE           312
 504 #define OPTION_NO_WCHAR_SIZE_WARNING    313
 505 '
 506
 507 PARSE_AND_LIST_SHORTOPTS=p
 508
 509 PARSE_AND_LIST_LONGOPTS='
 510   { "no-pipeline-knowledge", no_argument, NULL, '\'p\''},
 511   { "thumb-entry", required_argument, NULL, OPTION_THUMB_ENTRY},
 512   { "be8", no_argument, NULL, OPTION_BE8},
 513   { "target1-rel", no_argument, NULL, OPTION_TARGET1_REL},
 514   { "target1-abs", no_argument, NULL, OPTION_TARGET1_ABS},
 515   { "target2", required_argument, NULL, OPTION_TARGET2},
 516   { "fix-v4bx", no_argument, NULL, OPTION_FIX_V4BX},
 517   { "fix-v4bx-interworking", no_argument, NULL, OPTION_FIX_V4BX_INTERWORKING},
 518   { "use-blx", no_argument, NULL, OPTION_USE_BLX},
 519   { "vfp11-denorm-fix", required_argument, NULL, OPTION_VFP11_DENORM_FIX},
 520   { "no-enum-size-warning", no_argument, NULL, OPTION_NO_ENUM_SIZE_WARNING},
 521   { "pic-veneer", no_argument, NULL, OPTION_PIC_VENEER},
 522   { "stub-group-size", required_argument, NULL, OPTION_STUBGROUP_SIZE },
 523   { "no-wchar-size-warning", no_argument, NULL, OPTION_NO_WCHAR_SIZE_WARNING},
 524 '
 525
 526 PARSE_AND_LIST_OPTIONS='
 527   fprintf (file, _("  --thumb-entry=<sym>         Set the entry point to be Thumb symbol <sym>\n"));
 528   fprintf (file, _("  --be8                       Output BE8 format image\n"));
 529   fprintf (file, _("  --target1=rel               Interpret R_ARM_TARGET1 as R_ARM_REL32\n"));
 530   fprintf (file, _("  --target1=abs               Interpret R_ARM_TARGET1 as R_ARM_ABS32\n"));
 531   fprintf (file, _("  --target2=<type>            Specify definition of R_ARM_TARGET2\n"));
 532   fprintf (file, _("  --fix-v4bx                  Rewrite BX rn as MOV pc, rn for ARMv4\n"));
 533   fprintf (file, _("  --fix-v4bx-interworking     Rewrite BX rn branch to ARMv4 interworking veneer\n"));
 534   fprintf (file, _("  --use-blx                   Enable use of BLX instructions\n"));
 535   fprintf (file, _("  --vfp11-denorm-fix          Specify how to fix VFP11 denorm erratum\n"));
 536   fprintf (file, _("  --no-enum-size-warning      Don'\''t warn about objects with incompatible"
 537                    "                                enum sizes\n"));
 538   fprintf (file, _("  --no-wchar-size-warning     Don'\''t warn about objects with incompatible"
 539                    "                                wchar_t sizes\n"));
 540   fprintf (file, _("  --pic-veneer                Always generate PIC interworking veneers\n"));
 541   fprintf (file, _("\
 542    --stub-group-size=N   Maximum size of a group of input sections that can be\n\
 543                            handled by one stub section.  A negative value\n\
 544                            locates all stubs before their branches (with a\n\
 545                            group size of -N), while a positive value allows\n\
 546                            two groups of input sections, one before, and one\n\
 547                            after each stub section.  Values of +/-1 indicate\n\
 548                            the linker should choose suitable defaults.\n"
 549                    ));
 550 '
 551
 552 PARSE_AND_LIST_ARGS_CASES='
 553     case '\'p\'':
 554       /* Only here for backwards compatibility.  */
 555       break;
 556
 557     case OPTION_THUMB_ENTRY:
 558       thumb_entry_symbol = optarg;
 559       break;
 560
 561     case OPTION_BE8:
 562       byteswap_code = 1;
 563       break;
 564
 565     case OPTION_TARGET1_REL:
 566       target1_is_rel = 1;
 567       break;
 568
 569     case OPTION_TARGET1_ABS:
 570       target1_is_rel = 0;
 571       break;
 572
 573     case OPTION_TARGET2:
 574       target2_type = optarg;
 575       break;
 576
 577     case OPTION_FIX_V4BX:
 578       fix_v4bx = 1;
 579       break;
 580
 581     case OPTION_FIX_V4BX_INTERWORKING:
 582       fix_v4bx = 2;
 583       break;
 584
 585     case OPTION_USE_BLX:
 586       use_blx = 1;
 587       break;
 588
 589     case OPTION_VFP11_DENORM_FIX:
 590       if (strcmp (optarg, "none") == 0)
 591         vfp11_denorm_fix = BFD_ARM_VFP11_FIX_NONE;
 592       else if (strcmp (optarg, "scalar") == 0)
 593         vfp11_denorm_fix = BFD_ARM_VFP11_FIX_SCALAR;
 594       else if (strcmp (optarg, "vector") == 0)
 595         vfp11_denorm_fix = BFD_ARM_VFP11_FIX_VECTOR;
 596       else
 597         einfo (_("Unrecognized VFP11 fix type '\''%s'\''.\n"), optarg);
 598       break;
 599
 600     case OPTION_NO_ENUM_SIZE_WARNING:
 601       no_enum_size_warning = 1;
 602       break;
 603
 604     case OPTION_NO_WCHAR_SIZE_WARNING:
 605       no_wchar_size_warning = 1;
 606       break;
 607
 608     case OPTION_PIC_VENEER:
 609       pic_veneer = 1;
 610       break;
 611
 612     case OPTION_STUBGROUP_SIZE:
 613       {
 614         const char *end;
 615
 616         group_size = bfd_scan_vma (optarg, &end, 0);
 617         if (*end)
 618           einfo (_("%P%F: invalid number `%s'\''\n"), optarg);
 619       }
 620       break;
 621 '
 622
 623 # We have our own after_open and before_allocation functions, but they call
 624 # the standard routines, so give them a different name.
 625 LDEMUL_AFTER_OPEN=arm_elf_after_open
 626 LDEMUL_BEFORE_ALLOCATION=arm_elf_before_allocation
 627 LDEMUL_AFTER_ALLOCATION=arm_elf_after_allocation
 628 LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=arm_elf_create_output_section_statements
 629
 630 # Replace the elf before_parse function with our own.
 631 LDEMUL_BEFORE_PARSE=gld"${EMULATION_NAME}"_before_parse
 632
 633 # Call the extra arm-elf function
 634 LDEMUL_FINISH=gld${EMULATION_NAME}_finish