1 # This shell script emits a C file. -*- C -*-
2 # Copyright (C) 1991-2016 Free Software Foundation, Inc.
4 # This file is part of the GNU Binutils.
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.
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.
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,
22 # This file is sourced from elf32.em, and defines extra arm-elf
25 test -z "$TARGET2_TYPE" && TARGET2_TYPE="rel"
31 static char * thumb_entry_symbol = NULL;
32 static int byteswap_code = 0;
33 static int target1_is_rel = 0${TARGET1_IS_REL};
34 static char * target2_type = "${TARGET2_TYPE}";
35 static int fix_v4bx = 0;
36 static int use_blx = 0;
37 static bfd_arm_vfp11_fix vfp11_denorm_fix = BFD_ARM_VFP11_FIX_DEFAULT;
38 static bfd_arm_stm32l4xx_fix stm32l4xx_fix = BFD_ARM_STM32L4XX_FIX_NONE;
39 static int fix_cortex_a8 = -1;
40 static int no_enum_size_warning = 0;
41 static int no_wchar_size_warning = 0;
42 static int pic_veneer = 0;
43 static int merge_exidx_entries = -1;
44 static int fix_arm1176 = 1;
47 gld${EMULATION_NAME}_before_parse (void)
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${SEPARATE_CODE}" = xyes ; then echo TRUE ; else echo FALSE ; fi`;
58 gld${EMULATION_NAME}_set_symbols (void)
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;
71 arm_elf_before_allocation (void)
73 bfd_elf32_arm_set_byteswap_code (&link_info, byteswap_code);
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);
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);
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);
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)
90 /* Here we rummage through the found bfds to collect glue information. */
91 LANG_FOR_EACH_INPUT_STATEMENT (is)
93 /* Initialise mapping tables for code/data. */
94 bfd_elf32_arm_init_maps (is->the_bfd);
96 if (!bfd_elf32_arm_process_before_allocation (is->the_bfd,
98 || !bfd_elf32_arm_vfp11_erratum_scan (is->the_bfd, &link_info)
99 || !bfd_elf32_arm_stm32l4xx_erratum_scan (is->the_bfd,
101 /* xgettext:c-format */
102 einfo (_("Errors encountered processing file %s"), is->filename);
105 /* We have seen it all. Allocate it, and carry on. */
106 bfd_elf32_arm_allocate_interworking_sections (& link_info);
109 /* Call the standard elf routine. */
110 gld${EMULATION_NAME}_before_allocation ();
113 /* Fake input file for stubs. */
114 static lang_input_statement_type *stub_file;
116 /* Whether we need to call gldarm_layout_sections_again. */
117 static int need_laying_out = 0;
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;
124 struct hook_stub_info
126 lang_statement_list_type add;
127 asection *input_section;
130 /* Traverse the linker tree to find the spot where the stub goes. */
133 hook_in_stub (struct hook_stub_info *info, lang_statement_union_type **lp)
135 lang_statement_union_type *l;
138 for (; (l = *lp) != NULL; lp = &l->header.next)
140 switch (l->header.type)
142 case lang_constructors_statement_enum:
143 ret = hook_in_stub (info, &constructor_list.head);
148 case lang_output_section_statement_enum:
149 ret = hook_in_stub (info,
150 &l->output_section_statement.children.head);
155 case lang_wild_statement_enum:
156 ret = hook_in_stub (info, &l->wild_statement.children.head);
161 case lang_group_statement_enum:
162 ret = hook_in_stub (info, &l->group_statement.children.head);
167 case lang_input_section_enum:
168 if (l->input_section.section == info->input_section)
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;
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:
199 /* Call-back for elf32_arm_size_stubs. */
201 /* Create a new stub section, and arrange for it to be linked
202 immediately after INPUT_SECTION. */
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)
212 lang_output_section_statement_type *os;
213 struct hook_stub_info info;
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)
222 bfd_set_section_alignment (stub_file->the_bfd, stub_sec, alignment_power);
224 os = lang_output_section_get (output_section);
226 info.input_section = after_input_section;
227 lang_list_init (&info.add);
228 lang_add_section (&info.add, stub_sec, NULL, os);
230 if (info.add.head == NULL)
233 if (after_input_section == NULL)
235 lang_statement_union_type **lp = &os->children.head;
236 lang_statement_union_type *l, *lprev = NULL;
238 for (; (l = *lp) != NULL; lp = &l->header.next, lprev = l);
241 lprev->header.next = info.add.head;
243 os->children.head = info.add.head;
249 if (hook_in_stub (&info, &os->children.head))
254 einfo ("%X%P: can not make stub section: %E\n");
258 /* Another call-back for elf_arm_size_stubs. */
261 gldarm_layout_sections_again (void)
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;
271 build_section_lists (lang_statement_union_type *statement)
273 if (statement->header.type == lang_input_section_enum)
275 asection *i = statement->input_section.section;
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);
286 compare_output_sec_vma (const void *a, const void *b)
288 asection *asec = *(asection **) a, *bsec = *(asection **) b;
289 asection *aout = asec->output_section, *bout = bsec->output_section;
292 /* If there's no output section for some reason, compare equal. */
296 avma = aout->vma + asec->output_offset;
297 bvma = bout->vma + bsec->output_offset;
301 else if (avma < bvma)
308 gld${EMULATION_NAME}_after_allocation (void)
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;
319 LANG_FOR_EACH_INPUT_STATEMENT (is)
321 bfd *abfd = is->the_bfd;
324 if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0)
327 for (sec = abfd->sections; sec != NULL; sec = sec->next)
329 asection *out_sec = sec->output_section;
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)
339 if (sec_count == list_size)
342 sec_list = (asection **)
343 xrealloc (sec_list, list_size * sizeof (asection *));
346 sec_list[sec_count++] = sec;
351 qsort (sec_list, sec_count, sizeof (asection *), &compare_output_sec_vma);
353 if (elf32_arm_fix_exidx_coverage (sec_list, sec_count, &link_info,
354 merge_exidx_entries))
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
363 ret = bfd_elf_discard_info (link_info.output_bfd, & link_info);
366 einfo ("%X%P: .eh_frame/.stab edit: %E\n");
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))
376 ret = elf32_arm_setup_section_lists (link_info.output_bfd, &link_info);
381 einfo ("%X%P: could not compute sections lists for stub generation: %E\n");
385 lang_for_each_statement (build_section_lists);
387 /* Call into the BFD backend to do the real work. */
388 if (! elf32_arm_size_stubs (link_info.output_bfd,
392 & elf32_arm_add_stub_section,
393 & gldarm_layout_sections_again))
395 einfo ("%X%P: cannot size stub section: %E\n");
401 if (need_laying_out != -1)
402 gld${EMULATION_NAME}_map_segments (need_laying_out);
406 gld${EMULATION_NAME}_finish (void)
408 struct bfd_link_hash_entry * h;
411 LANG_FOR_EACH_INPUT_STATEMENT (is)
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);
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);
423 if (!bfd_link_relocatable (&link_info))
425 /* Now build the linker stubs. */
426 if (stub_file->the_bfd->sections != NULL)
428 if (! elf32_arm_build_stubs (& link_info))
429 einfo ("%X%P: can not build stubs: %E\n");
435 if (thumb_entry_symbol)
437 h = bfd_link_hash_lookup (link_info.hash, thumb_entry_symbol,
442 struct elf_link_hash_entry * eh;
444 if (!entry_symbol.name)
447 h = bfd_link_hash_lookup (link_info.hash, entry_symbol.name,
449 eh = (struct elf_link_hash_entry *)h;
450 if (!h || ARM_GET_SYM_BRANCH_TYPE (eh->target_internal)
451 != ST_BRANCH_TO_THUMB)
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)
461 static char buffer[32];
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);
473 /* Now convert this value into a string and store it in entry_symbol
474 where the lang_finish() function will pick it up. */
478 sprintf_vma (buffer + 2, val);
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;
487 einfo (_("%P: warning: cannot find thumb start symbol %s\n"),
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. */
494 arm_elf_create_output_section_statements (void)
496 if (strstr (bfd_get_target (link_info.output_bfd), "arm") == NULL)
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");
506 bfd_elf32_arm_set_target_relocs (link_info.output_bfd, &link_info,
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,
515 stub_file = lang_add_input_file ("linker stubs",
516 lang_input_file_is_fake_enum,
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)))
524 einfo ("%X%P: can not create BFD %E\n");
528 stub_file->the_bfd->flags |= BFD_LINKER_CREATED;
529 ldlang_add_file (stub_file);
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);
536 /* Avoid processing the fake stub_file in vercheck, stat_needed and
537 check_needed routines. */
539 static void (*real_func) (lang_input_statement_type *);
541 static void arm_for_each_input_file_wrapper (lang_input_statement_type *l)
548 arm_lang_for_each_input_file (void (*func) (lang_input_statement_type *))
551 lang_for_each_input_file (&arm_for_each_input_file_wrapper);
554 #define lang_for_each_input_file arm_lang_for_each_input_file
558 # Define some shell vars to insert bits of code into the standard elf
559 # parse_args and list_options functions.
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
584 PARSE_AND_LIST_SHORTOPTS=p
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 },
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"
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"));
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"));
642 PARSE_AND_LIST_ARGS_CASES='
644 /* Only here for backwards compatibility. */
647 case OPTION_THUMB_ENTRY:
648 thumb_entry_symbol = optarg;
655 case OPTION_TARGET1_REL:
659 case OPTION_TARGET1_ABS:
664 target2_type = optarg;
667 case OPTION_FIX_V4BX:
671 case OPTION_FIX_V4BX_INTERWORKING:
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;
687 einfo (_("Unrecognized VFP11 fix type '\''%s'\''.\n"), optarg);
690 case OPTION_STM32L4XX_FIX:
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;
700 einfo (_("Unrecognized STM32L4XX fix type '\''%s'\''.\n"), optarg);
703 case OPTION_NO_ENUM_SIZE_WARNING:
704 no_enum_size_warning = 1;
707 case OPTION_NO_WCHAR_SIZE_WARNING:
708 no_wchar_size_warning = 1;
711 case OPTION_PIC_VENEER:
715 case OPTION_STUBGROUP_SIZE:
719 group_size = bfd_scan_vma (optarg, &end, 0);
721 einfo (_("%P%F: invalid number `%s'\''\n"), optarg);
725 case OPTION_FIX_CORTEX_A8:
729 case OPTION_NO_FIX_CORTEX_A8:
733 case OPTION_NO_MERGE_EXIDX_ENTRIES:
734 merge_exidx_entries = 0;
737 case OPTION_FIX_ARM1176:
741 case OPTION_NO_FIX_ARM1176:
745 case OPTION_LONG_PLT:
746 bfd_elf32_arm_use_long_plt ();
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
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
760 # Call the extra arm-elf function
761 LDEMUL_FINISH=gld${EMULATION_NAME}_finish