ld: Support ELF GNU program properties
[external/binutils.git] / bfd / elfxx-target.h
1 /* Target definitions for NN-bit ELF
2    Copyright (C) 1993-2017 Free Software Foundation, Inc.
3
4    This file is part of BFD, the Binary File Descriptor library.
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 structure contains everything that BFD knows about a target.
23    It includes things like its byte order, name, what routines to call
24    to do various operations, etc.  Every BFD points to a target structure
25    with its "xvec" member.
26
27    There are two such structures here:  one for big-endian machines and
28    one for little-endian machines.   */
29
30 #ifndef bfd_elfNN_close_and_cleanup
31 #define bfd_elfNN_close_and_cleanup _bfd_elf_close_and_cleanup
32 #endif
33 #ifndef bfd_elfNN_bfd_free_cached_info
34 #define bfd_elfNN_bfd_free_cached_info _bfd_free_cached_info
35 #endif
36 #ifndef bfd_elfNN_get_section_contents
37 #define bfd_elfNN_get_section_contents _bfd_generic_get_section_contents
38 #endif
39
40 #define bfd_elfNN_canonicalize_dynamic_symtab \
41   _bfd_elf_canonicalize_dynamic_symtab
42 #ifndef bfd_elfNN_get_synthetic_symtab
43 #define bfd_elfNN_get_synthetic_symtab \
44   _bfd_elf_get_synthetic_symtab
45 #endif
46 #ifndef bfd_elfNN_canonicalize_reloc
47 #define bfd_elfNN_canonicalize_reloc    _bfd_elf_canonicalize_reloc
48 #endif
49 #ifndef bfd_elfNN_find_nearest_line
50 #define bfd_elfNN_find_nearest_line     _bfd_elf_find_nearest_line
51 #endif
52 #ifndef bfd_elfNN_find_line
53 #define bfd_elfNN_find_line             _bfd_elf_find_line
54 #endif
55 #ifndef bfd_elfNN_find_inliner_info
56 #define bfd_elfNN_find_inliner_info     _bfd_elf_find_inliner_info
57 #endif
58 #define bfd_elfNN_read_minisymbols      _bfd_elf_read_minisymbols
59 #define bfd_elfNN_minisymbol_to_symbol  _bfd_elf_minisymbol_to_symbol
60 #define bfd_elfNN_get_dynamic_symtab_upper_bound \
61   _bfd_elf_get_dynamic_symtab_upper_bound
62 #define bfd_elfNN_get_lineno            _bfd_elf_get_lineno
63 #ifndef bfd_elfNN_get_reloc_upper_bound
64 #define bfd_elfNN_get_reloc_upper_bound _bfd_elf_get_reloc_upper_bound
65 #endif
66 #ifndef bfd_elfNN_get_symbol_info
67 #define bfd_elfNN_get_symbol_info       _bfd_elf_get_symbol_info
68 #endif
69 #ifndef bfd_elfNN_get_symbol_version_string
70 #define bfd_elfNN_get_symbol_version_string \
71   _bfd_elf_get_symbol_version_string
72 #endif
73 #define bfd_elfNN_canonicalize_symtab   _bfd_elf_canonicalize_symtab
74 #define bfd_elfNN_get_symtab_upper_bound _bfd_elf_get_symtab_upper_bound
75 #define bfd_elfNN_make_empty_symbol     _bfd_elf_make_empty_symbol
76 #ifndef bfd_elfNN_new_section_hook
77 #define bfd_elfNN_new_section_hook      _bfd_elf_new_section_hook
78 #endif
79 #define bfd_elfNN_set_arch_mach         _bfd_elf_set_arch_mach
80 #ifndef bfd_elfNN_set_section_contents
81 #define bfd_elfNN_set_section_contents  _bfd_elf_set_section_contents
82 #endif
83 #define bfd_elfNN_sizeof_headers        _bfd_elf_sizeof_headers
84 #define bfd_elfNN_write_object_contents _bfd_elf_write_object_contents
85 #define bfd_elfNN_write_corefile_contents _bfd_elf_write_corefile_contents
86
87 #define bfd_elfNN_get_section_contents_in_window \
88   _bfd_generic_get_section_contents_in_window
89
90 #ifndef elf_backend_can_refcount
91 #define elf_backend_can_refcount 0
92 #endif
93 #ifndef elf_backend_want_got_plt
94 #define elf_backend_want_got_plt 0
95 #endif
96 #ifndef elf_backend_plt_readonly
97 #define elf_backend_plt_readonly 0
98 #endif
99 #ifndef elf_backend_want_plt_sym
100 #define elf_backend_want_plt_sym 0
101 #endif
102 #ifndef elf_backend_plt_not_loaded
103 #define elf_backend_plt_not_loaded 0
104 #endif
105 #ifndef elf_backend_plt_alignment
106 #define elf_backend_plt_alignment 2
107 #endif
108 #ifndef elf_backend_want_dynbss
109 #define elf_backend_want_dynbss 1
110 #endif
111 #ifndef elf_backend_want_dynrelro
112 #define elf_backend_want_dynrelro 0
113 #endif
114 #ifndef elf_backend_want_p_paddr_set_to_zero
115 #define elf_backend_want_p_paddr_set_to_zero 0
116 #endif
117 #ifndef elf_backend_no_page_alias
118 #define elf_backend_no_page_alias 0
119 #endif
120 #ifndef elf_backend_default_execstack
121 #define elf_backend_default_execstack 1
122 #endif
123 #ifndef elf_backend_caches_rawsize
124 #define elf_backend_caches_rawsize 0
125 #endif
126 #ifndef elf_backend_extern_protected_data
127 #define elf_backend_extern_protected_data 0
128 #endif
129 #ifndef elf_backend_stack_align
130 #define elf_backend_stack_align 16
131 #endif
132 #ifndef elf_backend_strtab_flags
133 #define elf_backend_strtab_flags 0
134 #endif
135
136 #define bfd_elfNN_bfd_debug_info_start  bfd_void
137 #define bfd_elfNN_bfd_debug_info_end    bfd_void
138 #define bfd_elfNN_bfd_debug_info_accumulate \
139   ((void (*) (bfd*, struct bfd_section *)) bfd_void)
140
141 #ifndef bfd_elfNN_bfd_get_relocated_section_contents
142 #define bfd_elfNN_bfd_get_relocated_section_contents \
143   bfd_generic_get_relocated_section_contents
144 #endif
145
146 #ifndef bfd_elfNN_bfd_relax_section
147 #define bfd_elfNN_bfd_relax_section bfd_generic_relax_section
148 #endif
149
150 #ifndef elf_backend_can_gc_sections
151 #define elf_backend_can_gc_sections 0
152 #endif
153 #ifndef elf_backend_can_refcount
154 #define elf_backend_can_refcount 0
155 #endif
156 #ifndef elf_backend_want_got_sym
157 #define elf_backend_want_got_sym 1
158 #endif
159 #ifndef elf_backend_gc_keep
160 #define elf_backend_gc_keep             _bfd_elf_gc_keep
161 #endif
162 #ifndef elf_backend_gc_mark_dynamic_ref
163 #define elf_backend_gc_mark_dynamic_ref bfd_elf_gc_mark_dynamic_ref_symbol
164 #endif
165 #ifndef elf_backend_gc_mark_hook
166 #define elf_backend_gc_mark_hook        _bfd_elf_gc_mark_hook
167 #endif
168 #ifndef elf_backend_gc_mark_extra_sections
169 #define elf_backend_gc_mark_extra_sections _bfd_elf_gc_mark_extra_sections
170 #endif
171 #ifndef elf_backend_gc_sweep_hook
172 #define elf_backend_gc_sweep_hook       NULL
173 #endif
174 #ifndef bfd_elfNN_bfd_gc_sections
175 #define bfd_elfNN_bfd_gc_sections bfd_elf_gc_sections
176 #endif
177
178 #ifndef bfd_elfNN_bfd_merge_sections
179 #define bfd_elfNN_bfd_merge_sections \
180   _bfd_elf_merge_sections
181 #endif
182
183 #ifndef bfd_elfNN_bfd_is_group_section
184 #define bfd_elfNN_bfd_is_group_section bfd_elf_is_group_section
185 #endif
186
187 #ifndef bfd_elfNN_bfd_discard_group
188 #define bfd_elfNN_bfd_discard_group bfd_generic_discard_group
189 #endif
190
191 #ifndef bfd_elfNN_section_already_linked
192 #define bfd_elfNN_section_already_linked \
193   _bfd_elf_section_already_linked
194 #endif
195
196 #ifndef bfd_elfNN_bfd_define_common_symbol
197 #define bfd_elfNN_bfd_define_common_symbol bfd_generic_define_common_symbol
198 #endif
199
200 #ifndef bfd_elfNN_bfd_lookup_section_flags
201 #define bfd_elfNN_bfd_lookup_section_flags bfd_elf_lookup_section_flags
202 #endif
203
204 #ifndef bfd_elfNN_bfd_make_debug_symbol
205 #define bfd_elfNN_bfd_make_debug_symbol \
206   ((asymbol * (*) (bfd *, void *, unsigned long)) bfd_nullvoidptr)
207 #endif
208
209 #ifndef bfd_elfNN_bfd_copy_private_symbol_data
210 #define bfd_elfNN_bfd_copy_private_symbol_data \
211   _bfd_elf_copy_private_symbol_data
212 #endif
213
214 #ifndef bfd_elfNN_bfd_copy_private_section_data
215 #define bfd_elfNN_bfd_copy_private_section_data \
216   _bfd_elf_copy_private_section_data
217 #endif
218 #ifndef bfd_elfNN_bfd_copy_private_header_data
219 #define bfd_elfNN_bfd_copy_private_header_data \
220   _bfd_elf_copy_private_header_data
221 #endif
222 #ifndef bfd_elfNN_bfd_copy_private_bfd_data
223 #define bfd_elfNN_bfd_copy_private_bfd_data \
224   _bfd_elf_copy_private_bfd_data
225 #endif
226 #ifndef bfd_elfNN_bfd_print_private_bfd_data
227 #define bfd_elfNN_bfd_print_private_bfd_data \
228   _bfd_elf_print_private_bfd_data
229 #endif
230 #ifndef bfd_elfNN_bfd_merge_private_bfd_data
231 #define bfd_elfNN_bfd_merge_private_bfd_data \
232   ((bfd_boolean (*) (bfd *, struct bfd_link_info *)) bfd_true)
233 #endif
234 #ifndef bfd_elfNN_bfd_set_private_flags
235 #define bfd_elfNN_bfd_set_private_flags \
236   ((bfd_boolean (*) (bfd *, flagword)) bfd_true)
237 #endif
238 #ifndef bfd_elfNN_bfd_is_local_label_name
239 #define bfd_elfNN_bfd_is_local_label_name _bfd_elf_is_local_label_name
240 #endif
241 #ifndef bfd_elfNN_bfd_is_target_special_symbol
242 #define bfd_elfNN_bfd_is_target_special_symbol \
243   ((bfd_boolean (*) (bfd *, asymbol *)) bfd_false)
244 #endif
245
246 #ifndef bfd_elfNN_get_dynamic_reloc_upper_bound
247 #define bfd_elfNN_get_dynamic_reloc_upper_bound \
248   _bfd_elf_get_dynamic_reloc_upper_bound
249 #endif
250 #ifndef bfd_elfNN_canonicalize_dynamic_reloc
251 #define bfd_elfNN_canonicalize_dynamic_reloc \
252   _bfd_elf_canonicalize_dynamic_reloc
253 #endif
254
255 #ifdef elf_backend_relocate_section
256 #ifndef bfd_elfNN_bfd_link_hash_table_create
257 #define bfd_elfNN_bfd_link_hash_table_create _bfd_elf_link_hash_table_create
258 #endif
259 #ifndef bfd_elfNN_bfd_copy_link_hash_symbol_type
260 #define bfd_elfNN_bfd_copy_link_hash_symbol_type \
261   _bfd_elf_copy_link_hash_symbol_type
262 #endif
263 #ifndef bfd_elfNN_bfd_link_add_symbols
264 #define bfd_elfNN_bfd_link_add_symbols  bfd_elf_link_add_symbols
265 #endif
266 #ifndef bfd_elfNN_bfd_final_link
267 #define bfd_elfNN_bfd_final_link        bfd_elf_final_link
268 #endif
269 #else /* ! defined (elf_backend_relocate_section) */
270 /* If no backend relocate_section routine, use the generic linker.
271    Note - this will prevent the port from being able to use some of
272    the other features of the ELF linker, because the generic hash structure
273    does not have the fields needed by the ELF linker.  In particular it
274    means that linking directly to S-records will not work.  */
275 #ifndef bfd_elfNN_bfd_link_hash_table_create
276 #define bfd_elfNN_bfd_link_hash_table_create \
277   _bfd_generic_link_hash_table_create
278 #endif
279 #ifndef bfd_elfNN_bfd_copy_link_hash_symbol_type
280 #define bfd_elfNN_bfd_copy_link_hash_symbol_type \
281   _bfd_generic_copy_link_hash_symbol_type
282 #endif
283 #ifndef bfd_elfNN_bfd_link_add_symbols
284 #define bfd_elfNN_bfd_link_add_symbols  _bfd_generic_link_add_symbols
285 #endif
286 #ifndef bfd_elfNN_bfd_final_link
287 #define bfd_elfNN_bfd_final_link        _bfd_generic_final_link
288 #endif
289 #endif /* ! defined (elf_backend_relocate_section) */
290
291 #ifndef bfd_elfNN_bfd_link_just_syms
292 #define bfd_elfNN_bfd_link_just_syms    _bfd_elf_link_just_syms
293 #endif
294
295 #ifndef bfd_elfNN_bfd_link_split_section
296 #define bfd_elfNN_bfd_link_split_section _bfd_generic_link_split_section
297 #endif
298
299 #ifndef bfd_elfNN_bfd_link_check_relocs
300 #define bfd_elfNN_bfd_link_check_relocs  _bfd_elf_link_check_relocs
301 #endif
302
303 #ifndef bfd_elfNN_archive_p
304 #define bfd_elfNN_archive_p bfd_generic_archive_p
305 #endif
306
307 #ifndef bfd_elfNN_write_archive_contents
308 #define bfd_elfNN_write_archive_contents _bfd_write_archive_contents
309 #endif
310
311 #ifndef bfd_elfNN_mkobject
312 #define bfd_elfNN_mkobject bfd_elf_make_object
313 #endif
314
315 #ifndef bfd_elfNN_mkcorefile
316 #define bfd_elfNN_mkcorefile bfd_elf_mkcorefile
317 #endif
318
319 #ifndef bfd_elfNN_mkarchive
320 #define bfd_elfNN_mkarchive _bfd_generic_mkarchive
321 #endif
322
323 #ifndef bfd_elfNN_print_symbol
324 #define bfd_elfNN_print_symbol bfd_elf_print_symbol
325 #endif
326
327 #ifndef elf_symbol_leading_char
328 #define elf_symbol_leading_char 0
329 #endif
330
331 #ifndef elf_info_to_howto
332 #define elf_info_to_howto 0
333 #endif
334
335 #ifndef elf_info_to_howto_rel
336 #define elf_info_to_howto_rel 0
337 #endif
338
339 #ifndef elf_backend_arch_data
340 #define elf_backend_arch_data NULL
341 #endif
342
343 #ifndef ELF_TARGET_ID
344 #define ELF_TARGET_ID   GENERIC_ELF_DATA
345 #endif
346
347 #ifndef ELF_OSABI
348 #define ELF_OSABI ELFOSABI_NONE
349 #endif
350
351 #ifndef ELF_MAXPAGESIZE
352 # error ELF_MAXPAGESIZE is not defined
353 #define ELF_MAXPAGESIZE 1
354 #endif
355
356 #ifndef ELF_COMMONPAGESIZE
357 #define ELF_COMMONPAGESIZE ELF_MAXPAGESIZE
358 #endif
359
360 #ifndef ELF_MINPAGESIZE
361 #define ELF_MINPAGESIZE ELF_COMMONPAGESIZE
362 #endif
363
364 #if ELF_COMMONPAGESIZE > ELF_MAXPAGESIZE
365 # error ELF_COMMONPAGESIZE > ELF_MAXPAGESIZE
366 #endif
367 #if ELF_MINPAGESIZE > ELF_COMMONPAGESIZE
368 # error ELF_MINPAGESIZE > ELF_COMMONPAGESIZE
369 #endif
370
371 #ifndef ELF_DYNAMIC_SEC_FLAGS
372 /* Note that we set the SEC_IN_MEMORY flag for these sections.  */
373 #define ELF_DYNAMIC_SEC_FLAGS                   \
374   (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS      \
375    | SEC_IN_MEMORY | SEC_LINKER_CREATED)
376 #endif
377
378 #ifndef elf_backend_collect
379 #define elf_backend_collect FALSE
380 #endif
381 #ifndef elf_backend_type_change_ok
382 #define elf_backend_type_change_ok FALSE
383 #endif
384
385 #ifndef elf_backend_sym_is_global
386 #define elf_backend_sym_is_global       0
387 #endif
388 #ifndef elf_backend_object_p
389 #define elf_backend_object_p            0
390 #endif
391 #ifndef elf_backend_symbol_processing
392 #define elf_backend_symbol_processing   0
393 #endif
394 #ifndef elf_backend_symbol_table_processing
395 #define elf_backend_symbol_table_processing     0
396 #endif
397 #ifndef elf_backend_get_symbol_type
398 #define elf_backend_get_symbol_type 0
399 #endif
400 #ifndef elf_backend_archive_symbol_lookup
401 #define elf_backend_archive_symbol_lookup _bfd_elf_archive_symbol_lookup
402 #endif
403 #ifndef elf_backend_name_local_section_symbols
404 #define elf_backend_name_local_section_symbols  0
405 #endif
406 #ifndef elf_backend_section_processing
407 #define elf_backend_section_processing  0
408 #endif
409 #ifndef elf_backend_section_from_shdr
410 #define elf_backend_section_from_shdr   _bfd_elf_make_section_from_shdr
411 #endif
412 #ifndef elf_backend_section_flags
413 #define elf_backend_section_flags       0
414 #endif
415 #ifndef elf_backend_get_sec_type_attr
416 #define elf_backend_get_sec_type_attr   _bfd_elf_get_sec_type_attr
417 #endif
418 #ifndef elf_backend_section_from_phdr
419 #define elf_backend_section_from_phdr   _bfd_elf_make_section_from_phdr
420 #endif
421 #ifndef elf_backend_fake_sections
422 #define elf_backend_fake_sections       0
423 #endif
424 #ifndef elf_backend_section_from_bfd_section
425 #define elf_backend_section_from_bfd_section    0
426 #endif
427 #ifndef elf_backend_add_symbol_hook
428 #define elf_backend_add_symbol_hook     0
429 #endif
430 #ifndef elf_backend_link_output_symbol_hook
431 #define elf_backend_link_output_symbol_hook 0
432 #endif
433 #ifndef elf_backend_create_dynamic_sections
434 #define elf_backend_create_dynamic_sections 0
435 #endif
436 #ifndef elf_backend_omit_section_dynsym
437 #define elf_backend_omit_section_dynsym _bfd_elf_link_omit_section_dynsym
438 #endif
439 #ifndef elf_backend_relocs_compatible
440 #define elf_backend_relocs_compatible _bfd_elf_default_relocs_compatible
441 #endif
442 #ifndef elf_backend_check_relocs
443 #define elf_backend_check_relocs        0
444 #endif
445 #ifndef elf_backend_check_directives
446 #define elf_backend_check_directives    0
447 #endif
448 #ifndef elf_backend_notice_as_needed
449 #define elf_backend_notice_as_needed    _bfd_elf_notice_as_needed
450 #endif
451 #ifndef elf_backend_adjust_dynamic_symbol
452 #define elf_backend_adjust_dynamic_symbol 0
453 #endif
454 #ifndef elf_backend_always_size_sections
455 #define elf_backend_always_size_sections 0
456 #endif
457 #ifndef elf_backend_size_dynamic_sections
458 #define elf_backend_size_dynamic_sections 0
459 #endif
460 #ifndef elf_backend_init_index_section
461 #define elf_backend_init_index_section \
462  ((void (*) (bfd *, struct bfd_link_info *)) bfd_void)
463 #endif
464 #ifndef elf_backend_relocate_section
465 #define elf_backend_relocate_section    0
466 #endif
467 #ifndef elf_backend_finish_dynamic_symbol
468 #define elf_backend_finish_dynamic_symbol       0
469 #endif
470 #ifndef elf_backend_finish_dynamic_sections
471 #define elf_backend_finish_dynamic_sections     0
472 #endif
473 #ifndef elf_backend_begin_write_processing
474 #define elf_backend_begin_write_processing      0
475 #endif
476 #ifndef elf_backend_final_write_processing
477 #define elf_backend_final_write_processing      0
478 #endif
479 #ifndef elf_backend_additional_program_headers
480 #define elf_backend_additional_program_headers  0
481 #endif
482 #ifndef elf_backend_modify_segment_map
483 #define elf_backend_modify_segment_map  0
484 #endif
485 #ifndef elf_backend_modify_program_headers
486 #define elf_backend_modify_program_headers      0
487 #endif
488 #ifndef elf_backend_allow_non_load_phdr
489 #define elf_backend_allow_non_load_phdr \
490   ((bfd_boolean (*) (bfd *, const Elf_Internal_Phdr *, unsigned)) bfd_false)
491 #endif
492 #ifndef elf_backend_ecoff_debug_swap
493 #define elf_backend_ecoff_debug_swap    0
494 #endif
495 #ifndef elf_backend_bfd_from_remote_memory
496 #define elf_backend_bfd_from_remote_memory _bfd_elfNN_bfd_from_remote_memory
497 #endif
498 #ifndef elf_backend_got_header_size
499 #define elf_backend_got_header_size     0
500 #endif
501 #ifndef elf_backend_got_elt_size
502 #define elf_backend_got_elt_size _bfd_elf_default_got_elt_size
503 #endif
504 #ifndef elf_backend_obj_attrs_vendor
505 #define elf_backend_obj_attrs_vendor            NULL
506 #endif
507 #ifndef elf_backend_obj_attrs_section
508 #define elf_backend_obj_attrs_section           NULL
509 #endif
510 #ifndef elf_backend_obj_attrs_arg_type
511 #define elf_backend_obj_attrs_arg_type          NULL
512 #endif
513 #ifndef elf_backend_obj_attrs_section_type
514 #define elf_backend_obj_attrs_section_type              SHT_GNU_ATTRIBUTES
515 #endif
516 #ifndef elf_backend_obj_attrs_order
517 #define elf_backend_obj_attrs_order             NULL
518 #endif
519 #ifndef elf_backend_obj_attrs_handle_unknown
520 #define elf_backend_obj_attrs_handle_unknown    NULL
521 #endif
522 #ifndef elf_backend_parse_gnu_properties
523 #define elf_backend_parse_gnu_properties        NULL
524 #endif
525 #ifndef elf_backend_merge_gnu_properties
526 #define elf_backend_merge_gnu_properties        NULL
527 #endif
528 #ifndef elf_backend_setup_gnu_properties
529 #define elf_backend_setup_gnu_properties        _bfd_elf_link_setup_gnu_properties
530 #endif
531 #ifndef elf_backend_static_tls_alignment
532 #define elf_backend_static_tls_alignment        1
533 #endif
534 #ifndef elf_backend_post_process_headers
535 #define elf_backend_post_process_headers        _bfd_elf_post_process_headers
536 #endif
537 #ifndef elf_backend_print_symbol_all
538 #define elf_backend_print_symbol_all            NULL
539 #endif
540 #ifndef elf_backend_output_arch_local_syms
541 #define elf_backend_output_arch_local_syms      NULL
542 #endif
543 #ifndef elf_backend_output_arch_syms
544 #define elf_backend_output_arch_syms            NULL
545 #endif
546 #ifndef elf_backend_filter_implib_symbols
547 #define elf_backend_filter_implib_symbols       NULL
548 #endif
549 #ifndef elf_backend_copy_indirect_symbol
550 #define elf_backend_copy_indirect_symbol        _bfd_elf_link_hash_copy_indirect
551 #endif
552 #ifndef elf_backend_hide_symbol
553 #define elf_backend_hide_symbol                 _bfd_elf_link_hash_hide_symbol
554 #endif
555 #ifndef elf_backend_fixup_symbol
556 #define elf_backend_fixup_symbol                NULL
557 #endif
558 #ifndef elf_backend_merge_symbol_attribute
559 #define elf_backend_merge_symbol_attribute      NULL
560 #endif
561 #ifndef elf_backend_get_target_dtag
562 #define elf_backend_get_target_dtag             NULL
563 #endif
564 #ifndef elf_backend_ignore_undef_symbol
565 #define elf_backend_ignore_undef_symbol         NULL
566 #endif
567 #ifndef elf_backend_emit_relocs
568 #define elf_backend_emit_relocs                 _bfd_elf_link_output_relocs
569 #endif
570 #ifndef elf_backend_update_relocs
571 #define elf_backend_update_relocs               NULL
572 #endif
573 #ifndef elf_backend_count_relocs
574 #define elf_backend_count_relocs                NULL
575 #endif
576 #ifndef elf_backend_count_additional_relocs
577 #define elf_backend_count_additional_relocs     NULL
578 #endif
579 #ifndef elf_backend_sort_relocs_p
580 #define elf_backend_sort_relocs_p               NULL
581 #endif
582 #ifndef elf_backend_grok_prstatus
583 #define elf_backend_grok_prstatus               NULL
584 #endif
585 #ifndef elf_backend_grok_psinfo
586 #define elf_backend_grok_psinfo                 NULL
587 #endif
588 #ifndef elf_backend_write_core_note
589 #define elf_backend_write_core_note             NULL
590 #endif
591 #ifndef elf_backend_lookup_section_flags_hook
592 #define elf_backend_lookup_section_flags_hook   NULL
593 #endif
594 #ifndef elf_backend_reloc_type_class
595 #define elf_backend_reloc_type_class            _bfd_elf_reloc_type_class
596 #endif
597 #ifndef elf_backend_discard_info
598 #define elf_backend_discard_info                NULL
599 #endif
600 #ifndef elf_backend_ignore_discarded_relocs
601 #define elf_backend_ignore_discarded_relocs     NULL
602 #endif
603 #ifndef elf_backend_action_discarded
604 #define elf_backend_action_discarded _bfd_elf_default_action_discarded
605 #endif
606 #ifndef elf_backend_eh_frame_address_size
607 #define elf_backend_eh_frame_address_size _bfd_elf_eh_frame_address_size
608 #endif
609 #ifndef elf_backend_can_make_relative_eh_frame
610 #define elf_backend_can_make_relative_eh_frame  _bfd_elf_can_make_relative
611 #endif
612 #ifndef elf_backend_can_make_lsda_relative_eh_frame
613 #define elf_backend_can_make_lsda_relative_eh_frame     _bfd_elf_can_make_relative
614 #endif
615 #ifndef elf_backend_encode_eh_address
616 #define elf_backend_encode_eh_address           _bfd_elf_encode_eh_address
617 #endif
618 #ifndef elf_backend_write_section
619 #define elf_backend_write_section               NULL
620 #endif
621 #ifndef elf_backend_mips_irix_compat
622 #define elf_backend_mips_irix_compat            NULL
623 #endif
624 #ifndef elf_backend_mips_rtype_to_howto
625 #define elf_backend_mips_rtype_to_howto         NULL
626 #endif
627
628 /* Previously, backends could only use SHT_REL or SHT_RELA relocation
629    sections, but not both.  They defined USE_REL to indicate SHT_REL
630    sections, and left it undefined to indicated SHT_RELA sections.
631    For backwards compatibility, we still support this usage.  */
632 #ifndef USE_REL
633 #define USE_REL 0
634 #endif
635
636 /* Use these in new code.  */
637 #ifndef elf_backend_may_use_rel_p
638 #define elf_backend_may_use_rel_p USE_REL
639 #endif
640 #ifndef elf_backend_may_use_rela_p
641 #define elf_backend_may_use_rela_p !USE_REL
642 #endif
643 #ifndef elf_backend_default_use_rela_p
644 #define elf_backend_default_use_rela_p !USE_REL
645 #endif
646 #ifndef elf_backend_rela_plts_and_copies_p
647 #define elf_backend_rela_plts_and_copies_p elf_backend_default_use_rela_p
648 #endif
649
650 #ifndef elf_backend_rela_normal
651 #define elf_backend_rela_normal 0
652 #endif
653
654 #ifndef elf_backend_dtrel_excludes_plt
655 #define elf_backend_dtrel_excludes_plt 0
656 #endif
657
658 #ifndef elf_backend_plt_sym_val
659 #define elf_backend_plt_sym_val NULL
660 #endif
661 #ifndef elf_backend_relplt_name
662 #define elf_backend_relplt_name NULL
663 #endif
664
665 #ifndef ELF_MACHINE_ALT1
666 #define ELF_MACHINE_ALT1 0
667 #endif
668
669 #ifndef ELF_MACHINE_ALT2
670 #define ELF_MACHINE_ALT2 0
671 #endif
672
673 #ifndef elf_backend_size_info
674 #define elf_backend_size_info _bfd_elfNN_size_info
675 #endif
676
677 #ifndef elf_backend_special_sections
678 #define elf_backend_special_sections NULL
679 #endif
680
681 #ifndef elf_backend_sign_extend_vma
682 #define elf_backend_sign_extend_vma 0
683 #endif
684
685 #ifndef elf_backend_link_order_error_handler
686 #define elf_backend_link_order_error_handler _bfd_error_handler
687 #endif
688
689 #ifndef elf_backend_common_definition
690 #define elf_backend_common_definition _bfd_elf_common_definition
691 #endif
692
693 #ifndef elf_backend_common_section_index
694 #define elf_backend_common_section_index _bfd_elf_common_section_index
695 #endif
696
697 #ifndef elf_backend_common_section
698 #define elf_backend_common_section _bfd_elf_common_section
699 #endif
700
701 #ifndef elf_backend_merge_symbol
702 #define elf_backend_merge_symbol NULL
703 #endif
704
705 #ifndef elf_backend_hash_symbol
706 #define elf_backend_hash_symbol _bfd_elf_hash_symbol
707 #endif
708
709 #ifndef elf_backend_is_function_type
710 #define elf_backend_is_function_type _bfd_elf_is_function_type
711 #endif
712
713 #ifndef elf_backend_maybe_function_sym
714 #define elf_backend_maybe_function_sym _bfd_elf_maybe_function_sym
715 #endif
716
717 #ifndef elf_backend_get_reloc_section
718 #define elf_backend_get_reloc_section _bfd_elf_get_reloc_section
719 #endif
720
721 #ifndef elf_backend_copy_special_section_fields
722 #define elf_backend_copy_special_section_fields NULL
723 #endif
724
725 #ifndef elf_backend_compact_eh_encoding
726 #define elf_backend_compact_eh_encoding NULL
727 #endif
728
729 #ifndef elf_backend_cant_unwind_opcode
730 #define elf_backend_cant_unwind_opcode 0
731 #endif
732
733 #ifndef elf_match_priority
734 #define elf_match_priority \
735   (ELF_ARCH == bfd_arch_unknown ? 2 : ELF_OSABI == ELFOSABI_NONE ? 1 : 0)
736 #endif
737
738 extern const struct elf_size_info _bfd_elfNN_size_info;
739
740 static struct elf_backend_data elfNN_bed =
741 {
742   ELF_ARCH,                     /* arch */
743   ELF_TARGET_ID,                /* target_id */
744   ELF_MACHINE_CODE,             /* elf_machine_code */
745   ELF_OSABI,                    /* elf_osabi  */
746   ELF_MAXPAGESIZE,              /* maxpagesize */
747   ELF_MINPAGESIZE,              /* minpagesize */
748   ELF_COMMONPAGESIZE,           /* commonpagesize */
749   ELF_DYNAMIC_SEC_FLAGS,        /* dynamic_sec_flags */
750   elf_backend_arch_data,
751   elf_info_to_howto,
752   elf_info_to_howto_rel,
753   elf_backend_sym_is_global,
754   elf_backend_object_p,
755   elf_backend_symbol_processing,
756   elf_backend_symbol_table_processing,
757   elf_backend_get_symbol_type,
758   elf_backend_archive_symbol_lookup,
759   elf_backend_name_local_section_symbols,
760   elf_backend_section_processing,
761   elf_backend_section_from_shdr,
762   elf_backend_section_flags,
763   elf_backend_get_sec_type_attr,
764   elf_backend_section_from_phdr,
765   elf_backend_fake_sections,
766   elf_backend_section_from_bfd_section,
767   elf_backend_add_symbol_hook,
768   elf_backend_link_output_symbol_hook,
769   elf_backend_create_dynamic_sections,
770   elf_backend_omit_section_dynsym,
771   elf_backend_relocs_compatible,
772   elf_backend_check_relocs,
773   elf_backend_check_directives,
774   elf_backend_notice_as_needed,
775   elf_backend_adjust_dynamic_symbol,
776   elf_backend_always_size_sections,
777   elf_backend_size_dynamic_sections,
778   elf_backend_init_index_section,
779   elf_backend_relocate_section,
780   elf_backend_finish_dynamic_symbol,
781   elf_backend_finish_dynamic_sections,
782   elf_backend_begin_write_processing,
783   elf_backend_final_write_processing,
784   elf_backend_additional_program_headers,
785   elf_backend_modify_segment_map,
786   elf_backend_modify_program_headers,
787   elf_backend_allow_non_load_phdr,
788   elf_backend_gc_keep,
789   elf_backend_gc_mark_dynamic_ref,
790   elf_backend_gc_mark_hook,
791   elf_backend_gc_mark_extra_sections,
792   elf_backend_gc_sweep_hook,
793   elf_backend_post_process_headers,
794   elf_backend_print_symbol_all,
795   elf_backend_output_arch_local_syms,
796   elf_backend_output_arch_syms,
797   elf_backend_filter_implib_symbols,
798   elf_backend_copy_indirect_symbol,
799   elf_backend_hide_symbol,
800   elf_backend_fixup_symbol,
801   elf_backend_merge_symbol_attribute,
802   elf_backend_get_target_dtag,
803   elf_backend_ignore_undef_symbol,
804   elf_backend_emit_relocs,
805   elf_backend_update_relocs,
806   elf_backend_count_relocs,
807   elf_backend_count_additional_relocs,
808   elf_backend_sort_relocs_p,
809   elf_backend_grok_prstatus,
810   elf_backend_grok_psinfo,
811   elf_backend_write_core_note,
812   elf_backend_lookup_section_flags_hook,
813   elf_backend_reloc_type_class,
814   elf_backend_discard_info,
815   elf_backend_ignore_discarded_relocs,
816   elf_backend_action_discarded,
817   elf_backend_eh_frame_address_size,
818   elf_backend_can_make_relative_eh_frame,
819   elf_backend_can_make_lsda_relative_eh_frame,
820   elf_backend_encode_eh_address,
821   elf_backend_write_section,
822   elf_backend_mips_irix_compat,
823   elf_backend_mips_rtype_to_howto,
824   elf_backend_ecoff_debug_swap,
825   elf_backend_bfd_from_remote_memory,
826   elf_backend_plt_sym_val,
827   elf_backend_common_definition,
828   elf_backend_common_section_index,
829   elf_backend_common_section,
830   elf_backend_merge_symbol,
831   elf_backend_hash_symbol,
832   elf_backend_is_function_type,
833   elf_backend_maybe_function_sym,
834   elf_backend_get_reloc_section,
835   elf_backend_copy_special_section_fields,
836   elf_backend_link_order_error_handler,
837   elf_backend_relplt_name,
838   ELF_MACHINE_ALT1,
839   ELF_MACHINE_ALT2,
840   &elf_backend_size_info,
841   elf_backend_special_sections,
842   elf_backend_got_header_size,
843   elf_backend_got_elt_size,
844   elf_backend_obj_attrs_vendor,
845   elf_backend_obj_attrs_section,
846   elf_backend_obj_attrs_arg_type,
847   elf_backend_obj_attrs_section_type,
848   elf_backend_obj_attrs_order,
849   elf_backend_obj_attrs_handle_unknown,
850   elf_backend_parse_gnu_properties,
851   elf_backend_merge_gnu_properties,
852   elf_backend_setup_gnu_properties,
853   elf_backend_compact_eh_encoding,
854   elf_backend_cant_unwind_opcode,
855   elf_backend_static_tls_alignment,
856   elf_backend_stack_align,
857   elf_backend_strtab_flags,
858   elf_backend_collect,
859   elf_backend_type_change_ok,
860   elf_backend_may_use_rel_p,
861   elf_backend_may_use_rela_p,
862   elf_backend_default_use_rela_p,
863   elf_backend_rela_plts_and_copies_p,
864   elf_backend_rela_normal,
865   elf_backend_dtrel_excludes_plt,
866   elf_backend_sign_extend_vma,
867   elf_backend_want_got_plt,
868   elf_backend_plt_readonly,
869   elf_backend_want_plt_sym,
870   elf_backend_plt_not_loaded,
871   elf_backend_plt_alignment,
872   elf_backend_can_gc_sections,
873   elf_backend_can_refcount,
874   elf_backend_want_got_sym,
875   elf_backend_want_dynbss,
876   elf_backend_want_dynrelro,
877   elf_backend_want_p_paddr_set_to_zero,
878   elf_backend_no_page_alias,
879   elf_backend_default_execstack,
880   elf_backend_caches_rawsize,
881   elf_backend_extern_protected_data
882 };
883
884 /* Forward declaration for use when initialising alternative_target field.  */
885 #ifdef TARGET_LITTLE_SYM
886 extern const bfd_target TARGET_LITTLE_SYM;
887 #endif
888
889 #ifdef TARGET_BIG_SYM
890 const bfd_target TARGET_BIG_SYM =
891 {
892   /* name: identify kind of target */
893   TARGET_BIG_NAME,
894
895   /* flavour: general indication about file */
896   bfd_target_elf_flavour,
897
898   /* byteorder: data is big endian */
899   BFD_ENDIAN_BIG,
900
901   /* header_byteorder: header is also big endian */
902   BFD_ENDIAN_BIG,
903
904   /* object_flags: mask of all file flags */
905   (HAS_RELOC | EXEC_P | HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS
906    | DYNAMIC | WP_TEXT | D_PAGED | BFD_COMPRESS | BFD_DECOMPRESS
907    | BFD_COMPRESS_GABI | BFD_CONVERT_ELF_COMMON | BFD_USE_ELF_STT_COMMON),
908
909   /* section_flags: mask of all section flags */
910   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_READONLY
911    | SEC_CODE | SEC_DATA | SEC_DEBUGGING | SEC_EXCLUDE | SEC_SORT_ENTRIES
912    | SEC_SMALL_DATA | SEC_MERGE | SEC_STRINGS | SEC_GROUP),
913
914    /* leading_symbol_char: is the first char of a user symbol
915       predictable, and if so what is it */
916   elf_symbol_leading_char,
917
918   /* ar_pad_char: pad character for filenames within an archive header
919      FIXME:  this really has nothing to do with ELF, this is a characteristic
920      of the archiver and/or os and should be independently tunable */
921   '/',
922
923   /* ar_max_namelen: maximum number of characters in an archive header
924      FIXME:  this really has nothing to do with ELF, this is a characteristic
925      of the archiver and should be independently tunable.  The System V ABI,
926      Chapter 7 (Formats & Protocols), Archive section sets this as 15.  */
927   15,
928
929   elf_match_priority,
930
931   /* Routines to byte-swap various sized integers from the data sections */
932   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
933     bfd_getb32, bfd_getb_signed_32, bfd_putb32,
934     bfd_getb16, bfd_getb_signed_16, bfd_putb16,
935
936   /* Routines to byte-swap various sized integers from the file headers */
937   bfd_getb64, bfd_getb_signed_64, bfd_putb64,
938     bfd_getb32, bfd_getb_signed_32, bfd_putb32,
939     bfd_getb16, bfd_getb_signed_16, bfd_putb16,
940
941   /* bfd_check_format: check the format of a file being read */
942   { _bfd_dummy_target,          /* unknown format */
943     bfd_elfNN_object_p,         /* assembler/linker output (object file) */
944     bfd_elfNN_archive_p,        /* an archive */
945     bfd_elfNN_core_file_p       /* a core file */
946   },
947
948   /* bfd_set_format: set the format of a file being written */
949   { bfd_false,
950     bfd_elfNN_mkobject,
951     bfd_elfNN_mkarchive,
952     bfd_elfNN_mkcorefile
953   },
954
955   /* bfd_write_contents: write cached information into a file being written */
956   { bfd_false,
957     bfd_elfNN_write_object_contents,
958     bfd_elfNN_write_archive_contents,
959     bfd_elfNN_write_corefile_contents,
960   },
961
962   BFD_JUMP_TABLE_GENERIC (bfd_elfNN),
963   BFD_JUMP_TABLE_COPY (bfd_elfNN),
964   BFD_JUMP_TABLE_CORE (bfd_elfNN),
965 #ifdef bfd_elfNN_archive_functions
966   BFD_JUMP_TABLE_ARCHIVE (bfd_elfNN_archive),
967 #elif defined USE_64_BIT_ARCHIVE
968   BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_64_bit),
969 #else
970   BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
971 #endif
972   BFD_JUMP_TABLE_SYMBOLS (bfd_elfNN),
973   BFD_JUMP_TABLE_RELOCS (bfd_elfNN),
974   BFD_JUMP_TABLE_WRITE (bfd_elfNN),
975   BFD_JUMP_TABLE_LINK (bfd_elfNN),
976   BFD_JUMP_TABLE_DYNAMIC (bfd_elfNN),
977
978   /* Alternative endian target.  */
979 #ifdef TARGET_LITTLE_SYM
980   & TARGET_LITTLE_SYM,
981 #else
982   NULL,
983 #endif
984
985   /* backend_data: */
986   &elfNN_bed
987 };
988 #endif
989
990 #ifdef TARGET_LITTLE_SYM
991 const bfd_target TARGET_LITTLE_SYM =
992 {
993   /* name: identify kind of target */
994   TARGET_LITTLE_NAME,
995
996   /* flavour: general indication about file */
997   bfd_target_elf_flavour,
998
999   /* byteorder: data is little endian */
1000   BFD_ENDIAN_LITTLE,
1001
1002   /* header_byteorder: header is also little endian */
1003   BFD_ENDIAN_LITTLE,
1004
1005   /* object_flags: mask of all file flags */
1006   (HAS_RELOC | EXEC_P | HAS_LINENO | HAS_DEBUG | HAS_SYMS | HAS_LOCALS
1007    | DYNAMIC | WP_TEXT | D_PAGED | BFD_COMPRESS | BFD_DECOMPRESS
1008    | BFD_COMPRESS_GABI | BFD_CONVERT_ELF_COMMON | BFD_USE_ELF_STT_COMMON),
1009
1010   /* section_flags: mask of all section flags */
1011   (SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_READONLY
1012    | SEC_CODE | SEC_DATA | SEC_DEBUGGING | SEC_EXCLUDE | SEC_SORT_ENTRIES
1013    | SEC_SMALL_DATA | SEC_MERGE | SEC_STRINGS | SEC_GROUP),
1014
1015    /* leading_symbol_char: is the first char of a user symbol
1016       predictable, and if so what is it */
1017   elf_symbol_leading_char,
1018
1019   /* ar_pad_char: pad character for filenames within an archive header
1020      FIXME:  this really has nothing to do with ELF, this is a characteristic
1021      of the archiver and/or os and should be independently tunable */
1022   '/',
1023
1024   /* ar_max_namelen: maximum number of characters in an archive header
1025      FIXME:  this really has nothing to do with ELF, this is a characteristic
1026      of the archiver and should be independently tunable.  The System V ABI,
1027      Chapter 7 (Formats & Protocols), Archive section sets this as 15.  */
1028   15,
1029
1030   elf_match_priority,
1031
1032   /* Routines to byte-swap various sized integers from the data sections */
1033   bfd_getl64, bfd_getl_signed_64, bfd_putl64,
1034     bfd_getl32, bfd_getl_signed_32, bfd_putl32,
1035     bfd_getl16, bfd_getl_signed_16, bfd_putl16,
1036
1037   /* Routines to byte-swap various sized integers from the file headers */
1038   bfd_getl64, bfd_getl_signed_64, bfd_putl64,
1039     bfd_getl32, bfd_getl_signed_32, bfd_putl32,
1040     bfd_getl16, bfd_getl_signed_16, bfd_putl16,
1041
1042   /* bfd_check_format: check the format of a file being read */
1043   { _bfd_dummy_target,          /* unknown format */
1044     bfd_elfNN_object_p,         /* assembler/linker output (object file) */
1045     bfd_elfNN_archive_p,        /* an archive */
1046     bfd_elfNN_core_file_p       /* a core file */
1047   },
1048
1049   /* bfd_set_format: set the format of a file being written */
1050   { bfd_false,
1051     bfd_elfNN_mkobject,
1052     bfd_elfNN_mkarchive,
1053     bfd_elfNN_mkcorefile
1054   },
1055
1056   /* bfd_write_contents: write cached information into a file being written */
1057   { bfd_false,
1058     bfd_elfNN_write_object_contents,
1059     bfd_elfNN_write_archive_contents,
1060     bfd_elfNN_write_corefile_contents,
1061   },
1062
1063   BFD_JUMP_TABLE_GENERIC (bfd_elfNN),
1064   BFD_JUMP_TABLE_COPY (bfd_elfNN),
1065   BFD_JUMP_TABLE_CORE (bfd_elfNN),
1066 #ifdef bfd_elfNN_archive_functions
1067   BFD_JUMP_TABLE_ARCHIVE (bfd_elfNN_archive),
1068 #elif defined USE_64_BIT_ARCHIVE
1069   BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_64_bit),
1070 #else
1071   BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
1072 #endif
1073   BFD_JUMP_TABLE_SYMBOLS (bfd_elfNN),
1074   BFD_JUMP_TABLE_RELOCS (bfd_elfNN),
1075   BFD_JUMP_TABLE_WRITE (bfd_elfNN),
1076   BFD_JUMP_TABLE_LINK (bfd_elfNN),
1077   BFD_JUMP_TABLE_DYNAMIC (bfd_elfNN),
1078
1079   /* Alternative endian target.  */
1080 #ifdef TARGET_BIG_SYM
1081   & TARGET_BIG_SYM,
1082 #else
1083   NULL,
1084 #endif
1085
1086   /* backend_data: */
1087   &elfNN_bed
1088 };
1089 #endif