* Makefile.tpl: Generate normal dependencies if the LHS module is
[binutils.git] / bfd / elf-bfd.h
blob5367ad65a43d816ba34356fd11c876c85dd39f6a
1 /* BFD back-end data structures for ELF files.
2 Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
3 2002, 2003, 2004 Free Software Foundation, Inc.
4 Written by Cygnus Support.
6 This file is part of BFD, the Binary File Descriptor library.
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 2 of the License, or
11 (at your option) any later version.
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.
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
22 #ifndef _LIBELF_H_
23 #define _LIBELF_H_ 1
25 #include "elf/common.h"
26 #include "elf/internal.h"
27 #include "elf/external.h"
28 #include "bfdlink.h"
30 /* The number of entries in a section is its size divided by the size
31 of a single entry. This is normally only applicable to reloc and
32 symbol table sections. */
33 #define NUM_SHDR_ENTRIES(shdr) ((shdr)->sh_size / (shdr)->sh_entsize)
35 /* If size isn't specified as 64 or 32, NAME macro should fail. */
36 #ifndef NAME
37 #if ARCH_SIZE == 64
38 #define NAME(x, y) x ## 64 ## _ ## y
39 #endif
40 #if ARCH_SIZE == 32
41 #define NAME(x, y) x ## 32 ## _ ## y
42 #endif
43 #endif
45 #ifndef NAME
46 #define NAME(x, y) x ## NOSIZE ## _ ## y
47 #endif
49 #define ElfNAME(X) NAME(Elf,X)
50 #define elfNAME(X) NAME(elf,X)
52 /* Information held for an ELF symbol. The first field is the
53 corresponding asymbol. Every symbol is an ELF file is actually a
54 pointer to this structure, although it is often handled as a
55 pointer to an asymbol. */
57 typedef struct
59 /* The BFD symbol. */
60 asymbol symbol;
61 /* ELF symbol information. */
62 Elf_Internal_Sym internal_elf_sym;
63 /* Backend specific information. */
64 union
66 unsigned int hppa_arg_reloc;
67 void *mips_extr;
68 void *any;
70 tc_data;
72 /* Version information. This is from an Elf_Internal_Versym
73 structure in a SHT_GNU_versym section. It is zero if there is no
74 version information. */
75 unsigned short version;
77 } elf_symbol_type;
79 struct elf_strtab_hash;
80 struct got_entry;
81 struct plt_entry;
83 /* ELF linker hash table entries. */
85 struct elf_link_hash_entry
87 struct bfd_link_hash_entry root;
89 /* Symbol index in output file. This is initialized to -1. It is
90 set to -2 if the symbol is used by a reloc. */
91 long indx;
93 /* Symbol index as a dynamic symbol. Initialized to -1, and remains
94 -1 if this is not a dynamic symbol. */
95 /* ??? Note that this is consistently used as a synonym for tests
96 against whether we can perform various simplifying transformations
97 to the code. (E.g. changing a pc-relative jump to a PLT entry
98 into a pc-relative jump to the target function.) That test, which
99 is often relatively complex, and someplaces wrong or incomplete,
100 should really be replaced by a predicate in elflink.c.
102 End result: this field -1 does not indicate that the symbol is
103 not in the dynamic symbol table, but rather that the symbol is
104 not visible outside this DSO. */
105 long dynindx;
107 /* If this symbol requires an entry in the global offset table, the
108 processor specific backend uses this field to track usage and
109 final offset. Two schemes are supported: The first assumes that
110 a symbol may only have one GOT entry, and uses REFCOUNT until
111 size_dynamic_sections, at which point the contents of the .got is
112 fixed. Afterward, if OFFSET is -1, then the symbol does not
113 require a global offset table entry. The second scheme allows
114 multiple GOT entries per symbol, managed via a linked list
115 pointed to by GLIST. */
116 union gotplt_union
118 bfd_signed_vma refcount;
119 bfd_vma offset;
120 struct got_entry *glist;
121 struct plt_entry *plist;
122 } got;
124 /* Same, but tracks a procedure linkage table entry. */
125 union gotplt_union plt;
127 /* Symbol size. */
128 bfd_size_type size;
130 /* Symbol type (STT_NOTYPE, STT_OBJECT, etc.). */
131 unsigned int type : 8;
133 /* Symbol st_other value, symbol visibility. */
134 unsigned int other : 8;
136 /* Symbol is referenced by a non-shared object. */
137 unsigned int ref_regular : 1;
138 /* Symbol is defined by a non-shared object. */
139 unsigned int def_regular : 1;
140 /* Symbol is referenced by a shared object. */
141 unsigned int ref_dynamic : 1;
142 /* Symbol is defined by a shared object. */
143 unsigned int def_dynamic : 1;
144 /* Symbol has a non-weak reference from a non-shared object. */
145 unsigned int ref_regular_nonweak : 1;
146 /* Dynamic symbol has been adjustd. */
147 unsigned int dynamic_adjusted : 1;
148 /* Symbol needs a copy reloc. */
149 unsigned int needs_copy : 1;
150 /* Symbol needs a procedure linkage table entry. */
151 unsigned int needs_plt : 1;
152 /* Symbol appears in a non-ELF input file. */
153 unsigned int non_elf : 1;
154 /* Symbol should be marked as hidden in the version information. */
155 unsigned int hidden : 1;
156 /* Symbol was forced to local scope due to a version script file. */
157 unsigned int forced_local : 1;
158 /* Symbol was marked during garbage collection. */
159 unsigned int mark : 1;
160 /* Symbol is referenced by a non-GOT/non-PLT relocation. This is
161 not currently set by all the backends. */
162 unsigned int non_got_ref : 1;
163 /* Symbol has a definition in a shared object.
164 FIXME: There is no real need for this field if def_dynamic is never
165 cleared and all places that test def_dynamic also test def_regular. */
166 unsigned int dynamic_def : 1;
167 /* Symbol is weak in all shared objects. */
168 unsigned int dynamic_weak : 1;
169 /* Symbol is referenced with a relocation where C/C++ pointer equality
170 matters. */
171 unsigned int pointer_equality_needed : 1;
173 /* String table index in .dynstr if this is a dynamic symbol. */
174 unsigned long dynstr_index;
176 union
178 /* If this is a weak defined symbol from a dynamic object, this
179 field points to a defined symbol with the same value, if there is
180 one. Otherwise it is NULL. */
181 struct elf_link_hash_entry *weakdef;
183 /* Hash value of the name computed using the ELF hash function.
184 Used part way through size_dynamic_sections, after we've finished
185 with weakdefs. */
186 unsigned long elf_hash_value;
187 } u;
189 /* Version information. */
190 union
192 /* This field is used for a symbol which is not defined in a
193 regular object. It points to the version information read in
194 from the dynamic object. */
195 Elf_Internal_Verdef *verdef;
196 /* This field is used for a symbol which is defined in a regular
197 object. It is set up in size_dynamic_sections. It points to
198 the version information we should write out for this symbol. */
199 struct bfd_elf_version_tree *vertree;
200 } verinfo;
202 struct
204 /* Virtual table entry use information. This array is nominally of size
205 size/sizeof(target_void_pointer), though we have to be able to assume
206 and track a size while the symbol is still undefined. It is indexed
207 via offset/sizeof(target_void_pointer). */
208 size_t size;
209 bfd_boolean *used;
211 /* Virtual table derivation info. */
212 struct elf_link_hash_entry *parent;
213 } *vtable;
216 /* Will references to this symbol always reference the symbol
217 in this object? STV_PROTECTED is excluded from the visibility test
218 here so that function pointer comparisons work properly. Since
219 function symbols not defined in an app are set to their .plt entry,
220 it's necessary for shared libs to also reference the .plt even
221 though the symbol is really local to the shared lib. */
222 #define SYMBOL_REFERENCES_LOCAL(INFO, H) \
223 _bfd_elf_symbol_refs_local_p (H, INFO, 0)
225 /* Will _calls_ to this symbol always call the version in this object? */
226 #define SYMBOL_CALLS_LOCAL(INFO, H) \
227 _bfd_elf_symbol_refs_local_p (H, INFO, 1)
229 /* Common symbols that are turned into definitions don't have the
230 DEF_REGULAR flag set, so they might appear to be undefined. */
231 #define ELF_COMMON_DEF_P(H) \
232 (!(H)->def_regular \
233 && !(H)->def_dynamic \
234 && (H)->root.type == bfd_link_hash_defined)
236 /* Records local symbols to be emitted in the dynamic symbol table. */
238 struct elf_link_local_dynamic_entry
240 struct elf_link_local_dynamic_entry *next;
242 /* The input bfd this symbol came from. */
243 bfd *input_bfd;
245 /* The index of the local symbol being copied. */
246 long input_indx;
248 /* The index in the outgoing dynamic symbol table. */
249 long dynindx;
251 /* A copy of the input symbol. */
252 Elf_Internal_Sym isym;
255 struct elf_link_loaded_list
257 struct elf_link_loaded_list *next;
258 bfd *abfd;
261 /* Structures used by the eh_frame optimization code. */
262 struct cie_header
264 unsigned int length;
265 unsigned int id;
268 struct cie
270 struct cie_header hdr;
271 unsigned char version;
272 unsigned char augmentation[20];
273 unsigned int code_align;
274 int data_align;
275 unsigned int ra_column;
276 unsigned int augmentation_size;
277 struct elf_link_hash_entry *personality;
278 unsigned char per_encoding;
279 unsigned char lsda_encoding;
280 unsigned char fde_encoding;
281 unsigned char initial_insn_length;
282 unsigned char make_relative;
283 unsigned char make_lsda_relative;
284 unsigned char initial_instructions[50];
287 struct eh_cie_fde
289 /* For FDEs, this points to the CIE used. */
290 struct eh_cie_fde *cie_inf;
291 unsigned int size;
292 unsigned int offset;
293 unsigned int new_offset;
294 unsigned char fde_encoding;
295 unsigned char lsda_encoding;
296 unsigned char lsda_offset;
297 unsigned int cie : 1;
298 unsigned int removed : 1;
299 unsigned int add_augmentation_size : 1;
300 unsigned int add_fde_encoding : 1;
301 unsigned int make_relative : 1;
302 unsigned int make_lsda_relative : 1;
303 unsigned int need_lsda_relative : 1;
304 unsigned int per_encoding_relative : 1;
307 struct eh_frame_sec_info
309 unsigned int count;
310 unsigned int alloced;
311 struct eh_cie_fde entry[1];
314 struct eh_frame_array_ent
316 bfd_vma initial_loc;
317 bfd_vma fde;
320 struct eh_frame_hdr_info
322 struct cie last_cie;
323 asection *last_cie_sec;
324 struct eh_cie_fde *last_cie_inf;
325 asection *hdr_sec;
326 unsigned int fde_count, array_count;
327 struct eh_frame_array_ent *array;
328 /* TRUE if .eh_frame_hdr should contain the sorted search table.
329 We build it if we successfully read all .eh_frame input sections
330 and recognize them. */
331 bfd_boolean table;
332 bfd_boolean offsets_adjusted;
335 /* ELF linker hash table. */
337 struct elf_link_hash_table
339 struct bfd_link_hash_table root;
341 /* Whether we have created the special dynamic sections required
342 when linking against or generating a shared object. */
343 bfd_boolean dynamic_sections_created;
345 /* The BFD used to hold special sections created by the linker.
346 This will be the first BFD found which requires these sections to
347 be created. */
348 bfd *dynobj;
350 /* The value to use when initialising got.refcount/offset and
351 plt.refcount/offset in an elf_link_hash_entry. Set to zero when
352 the values are refcounts. Set to init_offset in
353 size_dynamic_sections when the values may be offsets. */
354 union gotplt_union init_refcount;
356 /* The value to use for got.refcount/offset and plt.refcount/offset
357 when the values may be offsets. Normally (bfd_vma) -1. */
358 union gotplt_union init_offset;
360 /* The number of symbols found in the link which must be put into
361 the .dynsym section. */
362 bfd_size_type dynsymcount;
364 /* The string table of dynamic symbols, which becomes the .dynstr
365 section. */
366 struct elf_strtab_hash *dynstr;
368 /* The number of buckets in the hash table in the .hash section.
369 This is based on the number of dynamic symbols. */
370 bfd_size_type bucketcount;
372 /* A linked list of DT_NEEDED names found in dynamic objects
373 included in the link. */
374 struct bfd_link_needed_list *needed;
376 /* The _GLOBAL_OFFSET_TABLE_ symbol. */
377 struct elf_link_hash_entry *hgot;
379 /* A pointer to information used to merge SEC_MERGE sections. */
380 void *merge_info;
382 /* Used to link stabs in sections. */
383 struct stab_info stab_info;
385 /* Used by eh_frame code when editing .eh_frame. */
386 struct eh_frame_hdr_info eh_info;
388 /* A linked list of local symbols to be added to .dynsym. */
389 struct elf_link_local_dynamic_entry *dynlocal;
391 /* A linked list of DT_RPATH/DT_RUNPATH names found in dynamic
392 objects included in the link. */
393 struct bfd_link_needed_list *runpath;
395 /* Cached first output tls section and size of PT_TLS segment. */
396 asection *tls_sec;
397 bfd_size_type tls_size;
399 /* A linked list of BFD's loaded in the link. */
400 struct elf_link_loaded_list *loaded;
403 /* Look up an entry in an ELF linker hash table. */
405 #define elf_link_hash_lookup(table, string, create, copy, follow) \
406 ((struct elf_link_hash_entry *) \
407 bfd_link_hash_lookup (&(table)->root, (string), (create), \
408 (copy), (follow)))
410 /* Traverse an ELF linker hash table. */
412 #define elf_link_hash_traverse(table, func, info) \
413 (bfd_link_hash_traverse \
414 (&(table)->root, \
415 (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func), \
416 (info)))
418 /* Get the ELF linker hash table from a link_info structure. */
420 #define elf_hash_table(p) ((struct elf_link_hash_table *) ((p)->hash))
422 /* Returns TRUE if the hash table is a struct elf_link_hash_table. */
423 #define is_elf_hash_table(htab) \
424 (((struct bfd_link_hash_table *) (htab))->type == bfd_link_elf_hash_table)
426 /* Used by bfd_section_from_r_symndx to cache a small number of local
427 symbol to section mappings. */
428 #define LOCAL_SYM_CACHE_SIZE 32
429 struct sym_sec_cache
431 bfd *abfd;
432 unsigned long indx[LOCAL_SYM_CACHE_SIZE];
433 asection *sec[LOCAL_SYM_CACHE_SIZE];
436 /* Constant information held for an ELF backend. */
438 struct elf_size_info {
439 unsigned char sizeof_ehdr, sizeof_phdr, sizeof_shdr;
440 unsigned char sizeof_rel, sizeof_rela, sizeof_sym, sizeof_dyn, sizeof_note;
442 /* The size of entries in the .hash section. */
443 unsigned char sizeof_hash_entry;
445 /* The number of internal relocations to allocate per external
446 relocation entry. */
447 unsigned char int_rels_per_ext_rel;
448 /* We use some fixed size arrays. This should be large enough to
449 handle all back-ends. */
450 #define MAX_INT_RELS_PER_EXT_REL 3
452 unsigned char arch_size, log_file_align;
453 unsigned char elfclass, ev_current;
454 int (*write_out_phdrs)
455 (bfd *, const Elf_Internal_Phdr *, unsigned int);
456 bfd_boolean
457 (*write_shdrs_and_ehdr) (bfd *);
458 void (*write_relocs)
459 (bfd *, asection *, void *);
460 void (*swap_symbol_in)
461 (bfd *, const void *, const void *, Elf_Internal_Sym *);
462 void (*swap_symbol_out)
463 (bfd *, const Elf_Internal_Sym *, void *, void *);
464 bfd_boolean (*slurp_reloc_table)
465 (bfd *, asection *, asymbol **, bfd_boolean);
466 long (*slurp_symbol_table)
467 (bfd *, asymbol **, bfd_boolean);
468 void (*swap_dyn_in)
469 (bfd *, const void *, Elf_Internal_Dyn *);
470 void (*swap_dyn_out)
471 (bfd *, const Elf_Internal_Dyn *, void *);
473 /* This function is called to swap in a REL relocation. If an
474 external relocation corresponds to more than one internal
475 relocation, then all relocations are swapped in at once. */
476 void (*swap_reloc_in)
477 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
479 /* This function is called to swap out a REL relocation. */
480 void (*swap_reloc_out)
481 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
483 /* This function is called to swap in a RELA relocation. If an
484 external relocation corresponds to more than one internal
485 relocation, then all relocations are swapped in at once. */
486 void (*swap_reloca_in)
487 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
489 /* This function is called to swap out a RELA relocation. */
490 void (*swap_reloca_out)
491 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
494 #define elf_symbol_from(ABFD,S) \
495 (((S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \
496 && (S)->the_bfd->tdata.elf_obj_data != 0) \
497 ? (elf_symbol_type *) (S) \
498 : 0)
500 enum elf_reloc_type_class {
501 reloc_class_normal,
502 reloc_class_relative,
503 reloc_class_plt,
504 reloc_class_copy
507 struct elf_reloc_cookie
509 Elf_Internal_Rela *rels, *rel, *relend;
510 Elf_Internal_Sym *locsyms;
511 bfd *abfd;
512 size_t locsymcount;
513 size_t extsymoff;
514 struct elf_link_hash_entry **sym_hashes;
515 int r_sym_shift;
516 bfd_boolean bad_symtab;
519 /* The level of IRIX compatibility we're striving for. */
521 typedef enum {
522 ict_none,
523 ict_irix5,
524 ict_irix6
525 } irix_compat_t;
527 /* Mapping of ELF section names and types. */
528 struct bfd_elf_special_section
530 const char *prefix;
531 int prefix_length;
532 /* 0 means name must match PREFIX exactly.
533 -1 means name must start with PREFIX followed by an arbitrary string.
534 -2 means name must match PREFIX exactly or consist of PREFIX followed
535 by a dot then anything.
536 > 0 means name must start with the first PREFIX_LENGTH chars of
537 PREFIX and finish with the last SUFFIX_LENGTH chars of PREFIX. */
538 int suffix_length;
539 int type;
540 int attr;
543 struct elf_backend_data
545 /* The architecture for this backend. */
546 enum bfd_architecture arch;
548 /* The ELF machine code (EM_xxxx) for this backend. */
549 int elf_machine_code;
551 /* The maximum page size for this backend. */
552 bfd_vma maxpagesize;
554 /* The BFD flags applied to sections created for dynamic linking. */
555 flagword dynamic_sec_flags;
557 /* A function to translate an ELF RELA relocation to a BFD arelent
558 structure. */
559 void (*elf_info_to_howto)
560 (bfd *, arelent *, Elf_Internal_Rela *);
562 /* A function to translate an ELF REL relocation to a BFD arelent
563 structure. */
564 void (*elf_info_to_howto_rel)
565 (bfd *, arelent *, Elf_Internal_Rela *);
567 /* A function to determine whether a symbol is global when
568 partitioning the symbol table into local and global symbols.
569 This should be NULL for most targets, in which case the correct
570 thing will be done. MIPS ELF, at least on the Irix 5, has
571 special requirements. */
572 bfd_boolean (*elf_backend_sym_is_global)
573 (bfd *, asymbol *);
575 /* The remaining functions are hooks which are called only if they
576 are not NULL. */
578 /* A function to permit a backend specific check on whether a
579 particular BFD format is relevant for an object file, and to
580 permit the backend to set any global information it wishes. When
581 this is called elf_elfheader is set, but anything else should be
582 used with caution. If this returns FALSE, the check_format
583 routine will return a bfd_error_wrong_format error. */
584 bfd_boolean (*elf_backend_object_p)
585 (bfd *);
587 /* A function to do additional symbol processing when reading the
588 ELF symbol table. This is where any processor-specific special
589 section indices are handled. */
590 void (*elf_backend_symbol_processing)
591 (bfd *, asymbol *);
593 /* A function to do additional symbol processing after reading the
594 entire ELF symbol table. */
595 bfd_boolean (*elf_backend_symbol_table_processing)
596 (bfd *, elf_symbol_type *, unsigned int);
598 /* A function to set the type of the info field. Processor-specific
599 types should be handled here. */
600 int (*elf_backend_get_symbol_type)
601 (Elf_Internal_Sym *, int);
603 /* A function to return the linker hash table entry of a symbol that
604 might be satisfied by an archive symbol. */
605 struct elf_link_hash_entry * (*elf_backend_archive_symbol_lookup)
606 (bfd *, struct bfd_link_info *, const char *);
608 /* Return true if local section symbols should have a non-null st_name.
609 NULL implies false. */
610 bfd_boolean (*elf_backend_name_local_section_symbols)
611 (bfd *);
613 /* A function to do additional processing on the ELF section header
614 just before writing it out. This is used to set the flags and
615 type fields for some sections, or to actually write out data for
616 unusual sections. */
617 bfd_boolean (*elf_backend_section_processing)
618 (bfd *, Elf_Internal_Shdr *);
620 /* A function to handle unusual section types when creating BFD
621 sections from ELF sections. */
622 bfd_boolean (*elf_backend_section_from_shdr)
623 (bfd *, Elf_Internal_Shdr *, const char *);
625 /* A function to convert machine dependent section header flags to
626 BFD internal section header flags. */
627 bfd_boolean (*elf_backend_section_flags)
628 (flagword *, const Elf_Internal_Shdr *);
630 /* A function to handle unusual program segment types when creating BFD
631 sections from ELF program segments. */
632 bfd_boolean (*elf_backend_section_from_phdr)
633 (bfd *, Elf_Internal_Phdr *, int);
635 /* A function to set up the ELF section header for a BFD section in
636 preparation for writing it out. This is where the flags and type
637 fields are set for unusual sections. */
638 bfd_boolean (*elf_backend_fake_sections)
639 (bfd *, Elf_Internal_Shdr *, asection *);
641 /* A function to get the ELF section index for a BFD section. If
642 this returns TRUE, the section was found. If it is a normal ELF
643 section, *RETVAL should be left unchanged. If it is not a normal
644 ELF section *RETVAL should be set to the SHN_xxxx index. */
645 bfd_boolean (*elf_backend_section_from_bfd_section)
646 (bfd *, asection *, int *retval);
648 /* If this field is not NULL, it is called by the add_symbols phase
649 of a link just before adding a symbol to the global linker hash
650 table. It may modify any of the fields as it wishes. If *NAME
651 is set to NULL, the symbol will be skipped rather than being
652 added to the hash table. This function is responsible for
653 handling all processor dependent symbol bindings and section
654 indices, and must set at least *FLAGS and *SEC for each processor
655 dependent case; failure to do so will cause a link error. */
656 bfd_boolean (*elf_add_symbol_hook)
657 (bfd *abfd, struct bfd_link_info *info, Elf_Internal_Sym *,
658 const char **name, flagword *flags, asection **sec, bfd_vma *value);
660 /* If this field is not NULL, it is called by the elf_link_output_sym
661 phase of a link for each symbol which will appear in the object file. */
662 bfd_boolean (*elf_backend_link_output_symbol_hook)
663 (struct bfd_link_info *info, const char *, Elf_Internal_Sym *,
664 asection *, struct elf_link_hash_entry *);
666 /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend
667 linker the first time it encounters a dynamic object in the link.
668 This function must create any sections required for dynamic
669 linking. The ABFD argument is a dynamic object. The .interp,
670 .dynamic, .dynsym, .dynstr, and .hash functions have already been
671 created, and this function may modify the section flags if
672 desired. This function will normally create the .got and .plt
673 sections, but different backends have different requirements. */
674 bfd_boolean (*elf_backend_create_dynamic_sections)
675 (bfd *abfd, struct bfd_link_info *info);
677 /* When creating a shared library, determine whether to omit the
678 dynamic symbol for the section. */
679 bfd_boolean (*elf_backend_omit_section_dynsym)
680 (bfd *output_bfd, struct bfd_link_info *info, asection *osec);
682 /* The CHECK_RELOCS function is called by the add_symbols phase of
683 the ELF backend linker. It is called once for each section with
684 relocs of an object file, just after the symbols for the object
685 file have been added to the global linker hash table. The
686 function must look through the relocs and do any special handling
687 required. This generally means allocating space in the global
688 offset table, and perhaps allocating space for a reloc. The
689 relocs are always passed as Rela structures; if the section
690 actually uses Rel structures, the r_addend field will always be
691 zero. */
692 bfd_boolean (*check_relocs)
693 (bfd *abfd, struct bfd_link_info *info, asection *o,
694 const Elf_Internal_Rela *relocs);
696 /* The CHECK_DIRECTIVES function is called once per input file by
697 the add_symbols phase of the ELF backend linker. The function
698 must inspect the bfd and create any additional symbols according
699 to any custom directives in the bfd. */
700 bfd_boolean (*check_directives)
701 (bfd *abfd, struct bfd_link_info *info);
703 /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
704 linker for every symbol which is defined by a dynamic object and
705 referenced by a regular object. This is called after all the
706 input files have been seen, but before the SIZE_DYNAMIC_SECTIONS
707 function has been called. The hash table entry should be
708 bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be
709 defined in a section from a dynamic object. Dynamic object
710 sections are not included in the final link, and this function is
711 responsible for changing the value to something which the rest of
712 the link can deal with. This will normally involve adding an
713 entry to the .plt or .got or some such section, and setting the
714 symbol to point to that. */
715 bfd_boolean (*elf_backend_adjust_dynamic_symbol)
716 (struct bfd_link_info *info, struct elf_link_hash_entry *h);
718 /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker
719 after all the linker input files have been seen but before the
720 section sizes have been set. This is called after
721 ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS. */
722 bfd_boolean (*elf_backend_always_size_sections)
723 (bfd *output_bfd, struct bfd_link_info *info);
725 /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend
726 linker after all the linker input files have been seen but before
727 the sections sizes have been set. This is called after
728 ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols.
729 It is only called when linking against a dynamic object. It must
730 set the sizes of the dynamic sections, and may fill in their
731 contents as well. The generic ELF linker can handle the .dynsym,
732 .dynstr and .hash sections. This function must handle the
733 .interp section and any sections created by the
734 CREATE_DYNAMIC_SECTIONS entry point. */
735 bfd_boolean (*elf_backend_size_dynamic_sections)
736 (bfd *output_bfd, struct bfd_link_info *info);
738 /* The RELOCATE_SECTION function is called by the ELF backend linker
739 to handle the relocations for a section.
741 The relocs are always passed as Rela structures; if the section
742 actually uses Rel structures, the r_addend field will always be
743 zero.
745 This function is responsible for adjust the section contents as
746 necessary, and (if using Rela relocs and generating a
747 relocatable output file) adjusting the reloc addend as
748 necessary.
750 This function does not have to worry about setting the reloc
751 address or the reloc symbol index.
753 LOCAL_SYMS is a pointer to the swapped in local symbols.
755 LOCAL_SECTIONS is an array giving the section in the input file
756 corresponding to the st_shndx field of each local symbol.
758 The global hash table entry for the global symbols can be found
759 via elf_sym_hashes (input_bfd).
761 When generating relocatable output, this function must handle
762 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
763 going to be the section symbol corresponding to the output
764 section, which means that the addend must be adjusted
765 accordingly. */
766 bfd_boolean (*elf_backend_relocate_section)
767 (bfd *output_bfd, struct bfd_link_info *info, bfd *input_bfd,
768 asection *input_section, bfd_byte *contents, Elf_Internal_Rela *relocs,
769 Elf_Internal_Sym *local_syms, asection **local_sections);
771 /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend
772 linker just before it writes a symbol out to the .dynsym section.
773 The processor backend may make any required adjustment to the
774 symbol. It may also take the opportunity to set contents of the
775 dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on
776 all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called
777 on those symbols which are defined by a dynamic object. */
778 bfd_boolean (*elf_backend_finish_dynamic_symbol)
779 (bfd *output_bfd, struct bfd_link_info *info,
780 struct elf_link_hash_entry *h, Elf_Internal_Sym *sym);
782 /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend
783 linker just before it writes all the dynamic sections out to the
784 output file. The FINISH_DYNAMIC_SYMBOL will have been called on
785 all dynamic symbols. */
786 bfd_boolean (*elf_backend_finish_dynamic_sections)
787 (bfd *output_bfd, struct bfd_link_info *info);
789 /* A function to do any beginning processing needed for the ELF file
790 before building the ELF headers and computing file positions. */
791 void (*elf_backend_begin_write_processing)
792 (bfd *, struct bfd_link_info *);
794 /* A function to do any final processing needed for the ELF file
795 before writing it out. The LINKER argument is TRUE if this BFD
796 was created by the ELF backend linker. */
797 void (*elf_backend_final_write_processing)
798 (bfd *, bfd_boolean linker);
800 /* This function is called by get_program_header_size. It should
801 return the number of additional program segments which this BFD
802 will need. It should return -1 on error. */
803 int (*elf_backend_additional_program_headers)
804 (bfd *);
806 /* This function is called to modify an existing segment map in a
807 backend specific fashion. */
808 bfd_boolean (*elf_backend_modify_segment_map)
809 (bfd *, struct bfd_link_info *);
811 /* This function is called during section gc to discover the section a
812 particular relocation refers to. */
813 asection * (*gc_mark_hook)
814 (asection *sec, struct bfd_link_info *, Elf_Internal_Rela *,
815 struct elf_link_hash_entry *h, Elf_Internal_Sym *);
817 /* This function, if defined, is called during the sweep phase of gc
818 in order that a backend might update any data structures it might
819 be maintaining. */
820 bfd_boolean (*gc_sweep_hook)
821 (bfd *abfd, struct bfd_link_info *info, asection *o,
822 const Elf_Internal_Rela *relocs);
824 /* This function, if defined, is called after the ELF headers have
825 been created. This allows for things like the OS and ABI versions
826 to be changed. */
827 void (*elf_backend_post_process_headers)
828 (bfd *, struct bfd_link_info *);
830 /* This function, if defined, prints a symbol to file and returns the
831 name of the symbol to be printed. It should return NULL to fall
832 back to default symbol printing. */
833 const char *(*elf_backend_print_symbol_all)
834 (bfd *, void *, asymbol *);
836 /* This function, if defined, is called after all local symbols and
837 global symbols converted to locals are emitted into the symtab
838 section. It allows the backend to emit special global symbols
839 not handled in the hash table. */
840 bfd_boolean (*elf_backend_output_arch_syms)
841 (bfd *, struct bfd_link_info *, void *,
842 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym *, asection *,
843 struct elf_link_hash_entry *));
845 /* Copy any information related to dynamic linking from a pre-existing
846 symbol to a newly created symbol. Also called to copy flags and
847 other back-end info to a weakdef, in which case the symbol is not
848 newly created and plt/got refcounts and dynamic indices should not
849 be copied. */
850 void (*elf_backend_copy_indirect_symbol)
851 (const struct elf_backend_data *, struct elf_link_hash_entry *,
852 struct elf_link_hash_entry *);
854 /* Modify any information related to dynamic linking such that the
855 symbol is not exported. */
856 void (*elf_backend_hide_symbol)
857 (struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean);
859 /* Merge the backend specific symbol attribute. */
860 void (*elf_backend_merge_symbol_attribute)
861 (struct elf_link_hash_entry *, const Elf_Internal_Sym *, bfd_boolean,
862 bfd_boolean);
864 /* Emit relocations. Overrides default routine for emitting relocs,
865 except during a relocatable link, or if all relocs are being emitted. */
866 bfd_boolean (*elf_backend_emit_relocs)
867 (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *);
869 /* Count relocations. Not called for relocatable links
870 or if all relocs are being preserved in the output. */
871 unsigned int (*elf_backend_count_relocs)
872 (asection *, Elf_Internal_Rela *);
874 /* This function, if defined, is called when an NT_PRSTATUS note is found
875 in a core file. */
876 bfd_boolean (*elf_backend_grok_prstatus)
877 (bfd *, Elf_Internal_Note *);
879 /* This function, if defined, is called when an NT_PSINFO or NT_PRPSINFO
880 note is found in a core file. */
881 bfd_boolean (*elf_backend_grok_psinfo)
882 (bfd *, Elf_Internal_Note *);
884 /* Functions to print VMAs. Special code to handle 64 bit ELF files. */
885 void (* elf_backend_sprintf_vma)
886 (bfd *, char *, bfd_vma);
887 void (* elf_backend_fprintf_vma)
888 (bfd *, void *, bfd_vma);
890 /* This function returns class of a reloc type. */
891 enum elf_reloc_type_class (*elf_backend_reloc_type_class)
892 (const Elf_Internal_Rela *);
894 /* This function, if defined, removes information about discarded functions
895 from other sections which mention them. */
896 bfd_boolean (*elf_backend_discard_info)
897 (bfd *, struct elf_reloc_cookie *, struct bfd_link_info *);
899 /* This function, if defined, signals that the function above has removed
900 the discarded relocations for this section. */
901 bfd_boolean (*elf_backend_ignore_discarded_relocs)
902 (asection *);
904 /* These functions tell elf-eh-frame whether to attempt to turn
905 absolute or lsda encodings into pc-relative ones. The default
906 definition enables these transformations. */
907 bfd_boolean (*elf_backend_can_make_relative_eh_frame)
908 (bfd *, struct bfd_link_info *, asection *);
909 bfd_boolean (*elf_backend_can_make_lsda_relative_eh_frame)
910 (bfd *, struct bfd_link_info *, asection *);
912 /* This function returns an encoding after computing the encoded
913 value (and storing it in ENCODED) for the given OFFSET into OSEC,
914 to be stored in at LOC_OFFSET into the LOC_SEC input section.
915 The default definition chooses a 32-bit PC-relative encoding. */
916 bfd_byte (*elf_backend_encode_eh_address)
917 (bfd *abfd, struct bfd_link_info *info,
918 asection *osec, bfd_vma offset,
919 asection *loc_sec, bfd_vma loc_offset,
920 bfd_vma *encoded);
922 /* This function, if defined, may write out the given section.
923 Returns TRUE if it did so and FALSE if the caller should. */
924 bfd_boolean (*elf_backend_write_section)
925 (bfd *, asection *, bfd_byte *);
927 /* The level of IRIX compatibility we're striving for.
928 MIPS ELF specific function. */
929 irix_compat_t (*elf_backend_mips_irix_compat)
930 (bfd *);
932 reloc_howto_type *(*elf_backend_mips_rtype_to_howto)
933 (unsigned int, bfd_boolean);
935 /* The swapping table to use when dealing with ECOFF information.
936 Used for the MIPS ELF .mdebug section. */
937 const struct ecoff_debug_swap *elf_backend_ecoff_debug_swap;
939 /* This function implements `bfd_elf_bfd_from_remote_memory';
940 see elf.c, elfcode.h. */
941 bfd *(*elf_backend_bfd_from_remote_memory)
942 (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep,
943 int (*target_read_memory) (bfd_vma vma, char *myaddr, int len));
945 /* This function is used by `_bfd_elf_get_synthetic_symtab';
946 see elf.c. */
947 bfd_vma (*plt_sym_val) (bfd_vma, const asection *, const arelent *);
949 /* Used to handle bad SHF_LINK_ORDER input. */
950 bfd_error_handler_type link_order_error_handler;
952 /* Name of the PLT relocation section. */
953 const char *relplt_name;
955 /* Alternate EM_xxxx machine codes for this backend. */
956 int elf_machine_alt1;
957 int elf_machine_alt2;
959 const struct elf_size_info *s;
961 /* An array of target specific special section map. */
962 const struct bfd_elf_special_section *special_sections;
964 /* offset of the _GLOBAL_OFFSET_TABLE_ symbol from the start of the
965 .got section */
966 bfd_vma got_symbol_offset;
968 /* The size in bytes of the header for the GOT. This includes the
969 so-called reserved entries on some systems. */
970 bfd_vma got_header_size;
972 /* This is TRUE if the linker should act like collect and gather
973 global constructors and destructors by name. This is TRUE for
974 MIPS ELF because the Irix 5 tools can not handle the .init
975 section. */
976 unsigned collect : 1;
978 /* This is TRUE if the linker should ignore changes to the type of a
979 symbol. This is TRUE for MIPS ELF because some Irix 5 objects
980 record undefined functions as STT_OBJECT although the definitions
981 are STT_FUNC. */
982 unsigned type_change_ok : 1;
984 /* Whether the backend may use REL relocations. (Some backends use
985 both REL and RELA relocations, and this flag is set for those
986 backends.) */
987 unsigned may_use_rel_p : 1;
989 /* Whether the backend may use RELA relocations. (Some backends use
990 both REL and RELA relocations, and this flag is set for those
991 backends.) */
992 unsigned may_use_rela_p : 1;
994 /* Whether the default relocation type is RELA. If a backend with
995 this flag set wants REL relocations for a particular section,
996 it must note that explicitly. Similarly, if this flag is clear,
997 and the backend wants RELA relocations for a particular
998 section. */
999 unsigned default_use_rela_p : 1;
1001 /* Set if RELA relocations for a relocatable link can be handled by
1002 generic code. Backends that set this flag need do nothing in the
1003 backend relocate_section routine for relocatable linking. */
1004 unsigned rela_normal : 1;
1006 /* TRUE if addresses "naturally" sign extend. This is used when
1007 swapping in from Elf32 when BFD64. */
1008 unsigned sign_extend_vma : 1;
1010 unsigned want_got_plt : 1;
1011 unsigned plt_readonly : 1;
1012 unsigned want_plt_sym : 1;
1013 unsigned plt_not_loaded : 1;
1014 unsigned plt_alignment : 4;
1015 unsigned can_gc_sections : 1;
1016 unsigned can_refcount : 1;
1017 unsigned want_got_sym : 1;
1018 unsigned want_dynbss : 1;
1019 /* Targets which do not support physical addressing often require
1020 that the p_paddr field in the section header to be set to zero.
1021 This field indicates whether this behavior is required. */
1022 unsigned want_p_paddr_set_to_zero : 1;
1025 /* Information stored for each BFD section in an ELF file. This
1026 structure is allocated by elf_new_section_hook. */
1028 struct bfd_elf_section_data
1030 /* The ELF header for this section. */
1031 Elf_Internal_Shdr this_hdr;
1033 /* The ELF header for the reloc section associated with this
1034 section, if any. */
1035 Elf_Internal_Shdr rel_hdr;
1037 /* If there is a second reloc section associated with this section,
1038 as can happen on Irix 6, this field points to the header. */
1039 Elf_Internal_Shdr *rel_hdr2;
1041 /* The number of relocations currently assigned to REL_HDR. */
1042 unsigned int rel_count;
1044 /* The number of relocations currently assigned to REL_HDR2. */
1045 unsigned int rel_count2;
1047 /* The ELF section number of this section. Only used for an output
1048 file. */
1049 int this_idx;
1051 /* The ELF section number of the reloc section indicated by
1052 REL_HDR if any. Only used for an output file. */
1053 int rel_idx;
1055 /* The ELF section number of the reloc section indicated by
1056 REL_HDR2 if any. Only used for an output file. */
1057 int rel_idx2;
1059 /* Used by the backend linker when generating a shared library to
1060 record the dynamic symbol index for a section symbol
1061 corresponding to this section. A value of 0 means that there is
1062 no dynamic symbol for this section. */
1063 int dynindx;
1065 /* A pointer to the linked-to section for SHF_LINK_ORDER. */
1066 asection *linked_to;
1068 /* Used by the backend linker to store the symbol hash table entries
1069 associated with relocs against global symbols. */
1070 struct elf_link_hash_entry **rel_hashes;
1072 /* A pointer to the swapped relocs. If the section uses REL relocs,
1073 rather than RELA, all the r_addend fields will be zero. This
1074 pointer may be NULL. It is used by the backend linker. */
1075 Elf_Internal_Rela *relocs;
1077 /* A pointer to a linked list tracking dynamic relocs copied for
1078 local symbols. */
1079 void *local_dynrel;
1081 /* A pointer to the bfd section used for dynamic relocs. */
1082 asection *sreloc;
1084 union {
1085 /* Group name, if this section is a member of a group. */
1086 const char *name;
1088 /* Group signature sym, if this is the SHT_GROUP section. */
1089 struct bfd_symbol *id;
1090 } group;
1092 /* Optional information about section group; NULL if it doesn't
1093 belongs to any section group. */
1094 asection *sec_group;
1096 /* A linked list of sections in the group. Circular when used by
1097 the linker. */
1098 asection *next_in_group;
1100 /* A pointer used for various section optimizations. */
1101 void *sec_info;
1104 #define elf_section_data(sec) ((struct bfd_elf_section_data*)sec->used_by_bfd)
1105 #define elf_linked_to_section(sec) (elf_section_data(sec)->linked_to)
1106 #define elf_section_type(sec) (elf_section_data(sec)->this_hdr.sh_type)
1107 #define elf_section_flags(sec) (elf_section_data(sec)->this_hdr.sh_flags)
1108 #define elf_group_name(sec) (elf_section_data(sec)->group.name)
1109 #define elf_group_id(sec) (elf_section_data(sec)->group.id)
1110 #define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group)
1111 #define elf_sec_group(sec) (elf_section_data(sec)->sec_group)
1113 /* Return TRUE if section has been discarded. */
1114 #define elf_discarded_section(sec) \
1115 (!bfd_is_abs_section (sec) \
1116 && bfd_is_abs_section ((sec)->output_section) \
1117 && (sec)->sec_info_type != ELF_INFO_TYPE_MERGE \
1118 && (sec)->sec_info_type != ELF_INFO_TYPE_JUST_SYMS)
1120 #define get_elf_backend_data(abfd) \
1121 ((const struct elf_backend_data *) (abfd)->xvec->backend_data)
1123 /* This struct is used to pass information to routines called via
1124 elf_link_hash_traverse which must return failure. */
1126 struct elf_info_failed
1128 bfd_boolean failed;
1129 struct bfd_link_info *info;
1130 struct bfd_elf_version_tree *verdefs;
1133 /* This structure is used to pass information to
1134 _bfd_elf_link_assign_sym_version. */
1136 struct elf_assign_sym_version_info
1138 /* Output BFD. */
1139 bfd *output_bfd;
1140 /* General link information. */
1141 struct bfd_link_info *info;
1142 /* Version tree. */
1143 struct bfd_elf_version_tree *verdefs;
1144 /* Whether we had a failure. */
1145 bfd_boolean failed;
1148 /* This structure is used to pass information to
1149 _bfd_elf_link_find_version_dependencies. */
1151 struct elf_find_verdep_info
1153 /* Output BFD. */
1154 bfd *output_bfd;
1155 /* General link information. */
1156 struct bfd_link_info *info;
1157 /* The number of dependencies. */
1158 unsigned int vers;
1159 /* Whether we had a failure. */
1160 bfd_boolean failed;
1163 /* Some private data is stashed away for future use using the tdata pointer
1164 in the bfd structure. */
1166 struct elf_obj_tdata
1168 Elf_Internal_Ehdr elf_header[1]; /* Actual data, but ref like ptr */
1169 Elf_Internal_Shdr **elf_sect_ptr;
1170 Elf_Internal_Phdr *phdr;
1171 struct elf_segment_map *segment_map;
1172 struct elf_strtab_hash *strtab_ptr;
1173 int num_locals;
1174 int num_globals;
1175 unsigned int num_elf_sections; /* elf_sect_ptr size */
1176 int num_section_syms;
1177 asymbol **section_syms; /* STT_SECTION symbols for each section */
1178 Elf_Internal_Shdr symtab_hdr;
1179 Elf_Internal_Shdr shstrtab_hdr;
1180 Elf_Internal_Shdr strtab_hdr;
1181 Elf_Internal_Shdr dynsymtab_hdr;
1182 Elf_Internal_Shdr dynstrtab_hdr;
1183 Elf_Internal_Shdr dynversym_hdr;
1184 Elf_Internal_Shdr dynverref_hdr;
1185 Elf_Internal_Shdr dynverdef_hdr;
1186 Elf_Internal_Shdr symtab_shndx_hdr;
1187 unsigned int symtab_section, shstrtab_section;
1188 unsigned int strtab_section, dynsymtab_section;
1189 unsigned int symtab_shndx_section;
1190 unsigned int dynversym_section, dynverdef_section, dynverref_section;
1191 file_ptr next_file_pos;
1192 bfd_vma gp; /* The gp value */
1193 unsigned int gp_size; /* The gp size */
1195 /* Information grabbed from an elf core file. */
1196 int core_signal;
1197 int core_pid;
1198 int core_lwpid;
1199 char* core_program;
1200 char* core_command;
1202 /* A mapping from external symbols to entries in the linker hash
1203 table, used when linking. This is indexed by the symbol index
1204 minus the sh_info field of the symbol table header. */
1205 struct elf_link_hash_entry **sym_hashes;
1207 /* Track usage and final offsets of GOT entries for local symbols.
1208 This array is indexed by symbol index. Elements are used
1209 identically to "got" in struct elf_link_hash_entry. */
1210 union
1212 bfd_signed_vma *refcounts;
1213 bfd_vma *offsets;
1214 struct got_entry **ents;
1215 } local_got;
1217 /* The linker ELF emulation code needs to let the backend ELF linker
1218 know what filename should be used for a dynamic object if the
1219 dynamic object is found using a search. The emulation code then
1220 sometimes needs to know what name was actually used. Until the
1221 file has been added to the linker symbol table, this field holds
1222 the name the linker wants. After it has been added, it holds the
1223 name actually used, which will be the DT_SONAME entry if there is
1224 one. */
1225 const char *dt_name;
1227 /* Records the result of `get_program_header_size'. */
1228 bfd_size_type program_header_size;
1230 /* Used by find_nearest_line entry point. */
1231 void *line_info;
1233 /* Used by MIPS ELF find_nearest_line entry point. The structure
1234 could be included directly in this one, but there's no point to
1235 wasting the memory just for the infrequently called
1236 find_nearest_line. */
1237 struct mips_elf_find_line *find_line_info;
1239 /* A place to stash dwarf1 info for this bfd. */
1240 struct dwarf1_debug *dwarf1_find_line_info;
1242 /* A place to stash dwarf2 info for this bfd. */
1243 void *dwarf2_find_line_info;
1245 /* An array of stub sections indexed by symbol number, used by the
1246 MIPS ELF linker. FIXME: We should figure out some way to only
1247 include this field for a MIPS ELF target. */
1248 asection **local_stubs;
1250 /* Used to determine if PT_GNU_EH_FRAME segment header should be
1251 created. */
1252 asection *eh_frame_hdr;
1254 Elf_Internal_Shdr **group_sect_ptr;
1255 int num_group;
1257 /* Number of symbol version definitions we are about to emit. */
1258 unsigned int cverdefs;
1260 /* Number of symbol version references we are about to emit. */
1261 unsigned int cverrefs;
1263 /* Segment flags for the PT_GNU_STACK segment. */
1264 unsigned int stack_flags;
1266 /* Should the PT_GNU_RELRO segment be emitted? */
1267 bfd_boolean relro;
1269 /* Symbol version definitions in external objects. */
1270 Elf_Internal_Verdef *verdef;
1272 /* Symbol version references to external objects. */
1273 Elf_Internal_Verneed *verref;
1275 /* The Irix 5 support uses two virtual sections, which represent
1276 text/data symbols defined in dynamic objects. */
1277 asymbol *elf_data_symbol;
1278 asymbol *elf_text_symbol;
1279 asection *elf_data_section;
1280 asection *elf_text_section;
1282 /* Whether a dyanmic object was specified normally on the linker
1283 command line, or was specified when --as-needed was in effect,
1284 or was found via a DT_NEEDED entry. */
1285 enum dynamic_lib_link_class dyn_lib_class;
1287 /* This is set to TRUE if the object was created by the backend
1288 linker. */
1289 bfd_boolean linker;
1291 /* Irix 5 often screws up the symbol table, sorting local symbols
1292 after global symbols. This flag is set if the symbol table in
1293 this BFD appears to be screwed up. If it is, we ignore the
1294 sh_info field in the symbol table header, and always read all the
1295 symbols. */
1296 bfd_boolean bad_symtab;
1298 /* Used to determine if the e_flags field has been initialized */
1299 bfd_boolean flags_init;
1302 #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
1303 #define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header)
1304 #define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr)
1305 #define elf_numsections(bfd) (elf_tdata(bfd) -> num_elf_sections)
1306 #define elf_shstrtab(bfd) (elf_tdata(bfd) -> strtab_ptr)
1307 #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section)
1308 #define elf_symtab_shndx(bfd) (elf_tdata(bfd) -> symtab_shndx_section)
1309 #define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section)
1310 #define elf_dynversym(bfd) (elf_tdata(bfd) -> dynversym_section)
1311 #define elf_dynverdef(bfd) (elf_tdata(bfd) -> dynverdef_section)
1312 #define elf_dynverref(bfd) (elf_tdata(bfd) -> dynverref_section)
1313 #define elf_num_locals(bfd) (elf_tdata(bfd) -> num_locals)
1314 #define elf_num_globals(bfd) (elf_tdata(bfd) -> num_globals)
1315 #define elf_section_syms(bfd) (elf_tdata(bfd) -> section_syms)
1316 #define elf_num_section_syms(bfd) (elf_tdata(bfd) -> num_section_syms)
1317 #define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
1318 #define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
1319 #define elf_gp(bfd) (elf_tdata(bfd) -> gp)
1320 #define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size)
1321 #define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes)
1322 #define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts)
1323 #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets)
1324 #define elf_local_got_ents(bfd) (elf_tdata(bfd) -> local_got.ents)
1325 #define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name)
1326 #define elf_dyn_lib_class(bfd) (elf_tdata(bfd) -> dyn_lib_class)
1327 #define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab)
1328 #define elf_flags_init(bfd) (elf_tdata(bfd) -> flags_init)
1330 extern void _bfd_elf_swap_verdef_in
1331 (bfd *, const Elf_External_Verdef *, Elf_Internal_Verdef *);
1332 extern void _bfd_elf_swap_verdef_out
1333 (bfd *, const Elf_Internal_Verdef *, Elf_External_Verdef *);
1334 extern void _bfd_elf_swap_verdaux_in
1335 (bfd *, const Elf_External_Verdaux *, Elf_Internal_Verdaux *);
1336 extern void _bfd_elf_swap_verdaux_out
1337 (bfd *, const Elf_Internal_Verdaux *, Elf_External_Verdaux *);
1338 extern void _bfd_elf_swap_verneed_in
1339 (bfd *, const Elf_External_Verneed *, Elf_Internal_Verneed *);
1340 extern void _bfd_elf_swap_verneed_out
1341 (bfd *, const Elf_Internal_Verneed *, Elf_External_Verneed *);
1342 extern void _bfd_elf_swap_vernaux_in
1343 (bfd *, const Elf_External_Vernaux *, Elf_Internal_Vernaux *);
1344 extern void _bfd_elf_swap_vernaux_out
1345 (bfd *, const Elf_Internal_Vernaux *, Elf_External_Vernaux *);
1346 extern void _bfd_elf_swap_versym_in
1347 (bfd *, const Elf_External_Versym *, Elf_Internal_Versym *);
1348 extern void _bfd_elf_swap_versym_out
1349 (bfd *, const Elf_Internal_Versym *, Elf_External_Versym *);
1351 extern int _bfd_elf_section_from_bfd_section
1352 (bfd *, asection *);
1353 extern char *bfd_elf_string_from_elf_section
1354 (bfd *, unsigned, unsigned);
1355 extern char *bfd_elf_get_str_section
1356 (bfd *, unsigned);
1357 extern Elf_Internal_Sym *bfd_elf_get_elf_syms
1358 (bfd *, Elf_Internal_Shdr *, size_t, size_t, Elf_Internal_Sym *, void *,
1359 Elf_External_Sym_Shndx *);
1360 extern const char *bfd_elf_local_sym_name
1361 (bfd *, Elf_Internal_Sym *);
1363 extern bfd_boolean _bfd_elf_copy_private_bfd_data
1364 (bfd *, bfd *);
1365 extern bfd_boolean _bfd_elf_print_private_bfd_data
1366 (bfd *, void *);
1367 extern void bfd_elf_print_symbol
1368 (bfd *, void *, asymbol *, bfd_print_symbol_type);
1370 #define elf_string_from_elf_strtab(abfd, strindex) \
1371 bfd_elf_string_from_elf_section (abfd, elf_elfheader(abfd)->e_shstrndx, \
1372 strindex)
1374 extern void _bfd_elf_sprintf_vma
1375 (bfd *, char *, bfd_vma);
1376 extern void _bfd_elf_fprintf_vma
1377 (bfd *, void *, bfd_vma);
1379 extern bfd_byte _bfd_elf_encode_eh_address
1380 (bfd *abfd, struct bfd_link_info *info, asection *osec, bfd_vma offset,
1381 asection *loc_sec, bfd_vma loc_offset, bfd_vma *encoded);
1382 extern bfd_boolean _bfd_elf_can_make_relative
1383 (bfd *input_bfd, struct bfd_link_info *info, asection *eh_frame_section);
1385 extern enum elf_reloc_type_class _bfd_elf_reloc_type_class
1386 (const Elf_Internal_Rela *);
1387 extern bfd_vma _bfd_elf_rela_local_sym
1388 (bfd *, Elf_Internal_Sym *, asection **, Elf_Internal_Rela *);
1389 extern bfd_vma _bfd_elf_rel_local_sym
1390 (bfd *, Elf_Internal_Sym *, asection **, bfd_vma);
1391 extern bfd_vma _bfd_elf_section_offset
1392 (bfd *, struct bfd_link_info *, asection *, bfd_vma);
1394 extern unsigned long bfd_elf_hash
1395 (const char *);
1397 extern bfd_reloc_status_type bfd_elf_generic_reloc
1398 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
1399 extern bfd_boolean bfd_elf_mkobject
1400 (bfd *);
1401 extern bfd_boolean bfd_elf_mkcorefile
1402 (bfd *);
1403 extern Elf_Internal_Shdr *bfd_elf_find_section
1404 (bfd *, char *);
1405 extern bfd_boolean _bfd_elf_make_section_from_shdr
1406 (bfd *, Elf_Internal_Shdr *, const char *);
1407 extern bfd_boolean _bfd_elf_make_section_from_phdr
1408 (bfd *, Elf_Internal_Phdr *, int, const char *);
1409 extern struct bfd_hash_entry *_bfd_elf_link_hash_newfunc
1410 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
1411 extern struct bfd_link_hash_table *_bfd_elf_link_hash_table_create
1412 (bfd *);
1413 extern void _bfd_elf_link_hash_copy_indirect
1414 (const struct elf_backend_data *, struct elf_link_hash_entry *,
1415 struct elf_link_hash_entry *);
1416 extern void _bfd_elf_link_hash_hide_symbol
1417 (struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean);
1418 extern bfd_boolean _bfd_elf_link_hash_table_init
1419 (struct elf_link_hash_table *, bfd *,
1420 struct bfd_hash_entry *(*)
1421 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
1422 extern bfd_boolean _bfd_elf_slurp_version_tables
1423 (bfd *, bfd_boolean);
1424 extern bfd_boolean _bfd_elf_merge_sections
1425 (bfd *, struct bfd_link_info *);
1426 extern bfd_boolean bfd_elf_is_group_section
1427 (bfd *, const struct bfd_section *);
1428 extern bfd_boolean bfd_elf_discard_group
1429 (bfd *, struct bfd_section *);
1430 extern void _bfd_elf_section_already_linked
1431 (bfd *, struct bfd_section *);
1432 extern void bfd_elf_set_group_contents
1433 (bfd *, asection *, void *);
1434 extern void _bfd_elf_link_just_syms
1435 (asection *, struct bfd_link_info *);
1436 extern bfd_boolean _bfd_elf_copy_private_header_data
1437 (bfd *, bfd *);
1438 extern bfd_boolean _bfd_elf_copy_private_symbol_data
1439 (bfd *, asymbol *, bfd *, asymbol *);
1440 extern bfd_boolean _bfd_elf_copy_private_section_data
1441 (bfd *, asection *, bfd *, asection *);
1442 extern bfd_boolean _bfd_elf_write_object_contents
1443 (bfd *);
1444 extern bfd_boolean _bfd_elf_write_corefile_contents
1445 (bfd *);
1446 extern bfd_boolean _bfd_elf_set_section_contents
1447 (bfd *, sec_ptr, const void *, file_ptr, bfd_size_type);
1448 extern long _bfd_elf_get_symtab_upper_bound
1449 (bfd *);
1450 extern long _bfd_elf_canonicalize_symtab
1451 (bfd *, asymbol **);
1452 extern long _bfd_elf_get_dynamic_symtab_upper_bound
1453 (bfd *);
1454 extern long _bfd_elf_canonicalize_dynamic_symtab
1455 (bfd *, asymbol **);
1456 extern long _bfd_elf_get_synthetic_symtab
1457 (bfd *, long, asymbol **, long, asymbol **, asymbol **);
1458 extern long _bfd_elf_get_reloc_upper_bound
1459 (bfd *, sec_ptr);
1460 extern long _bfd_elf_canonicalize_reloc
1461 (bfd *, sec_ptr, arelent **, asymbol **);
1462 extern long _bfd_elf_get_dynamic_reloc_upper_bound
1463 (bfd *);
1464 extern long _bfd_elf_canonicalize_dynamic_reloc
1465 (bfd *, arelent **, asymbol **);
1466 extern asymbol *_bfd_elf_make_empty_symbol
1467 (bfd *);
1468 extern void _bfd_elf_get_symbol_info
1469 (bfd *, asymbol *, symbol_info *);
1470 extern bfd_boolean _bfd_elf_is_local_label_name
1471 (bfd *, const char *);
1472 extern alent *_bfd_elf_get_lineno
1473 (bfd *, asymbol *);
1474 extern bfd_boolean _bfd_elf_set_arch_mach
1475 (bfd *, enum bfd_architecture, unsigned long);
1476 extern bfd_boolean _bfd_elf_find_nearest_line
1477 (bfd *, asection *, asymbol **, bfd_vma, const char **, const char **,
1478 unsigned int *);
1479 #define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols
1480 #define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
1481 extern int _bfd_elf_sizeof_headers
1482 (bfd *, bfd_boolean);
1483 extern bfd_boolean _bfd_elf_new_section_hook
1484 (bfd *, asection *);
1485 extern bfd_boolean _bfd_elf_init_reloc_shdr
1486 (bfd *, Elf_Internal_Shdr *, asection *, bfd_boolean);
1487 extern const struct bfd_elf_special_section *_bfd_elf_get_sec_type_attr
1488 (bfd *, const char *);
1490 /* If the target doesn't have reloc handling written yet: */
1491 extern void _bfd_elf_no_info_to_howto
1492 (bfd *, arelent *, Elf_Internal_Rela *);
1494 extern bfd_boolean bfd_section_from_shdr
1495 (bfd *, unsigned int shindex);
1496 extern bfd_boolean bfd_section_from_phdr
1497 (bfd *, Elf_Internal_Phdr *, int);
1499 extern int _bfd_elf_symbol_from_bfd_symbol
1500 (bfd *, asymbol **);
1502 extern asection *bfd_section_from_r_symndx
1503 (bfd *, struct sym_sec_cache *, asection *, unsigned long);
1504 extern asection *bfd_section_from_elf_index
1505 (bfd *, unsigned int);
1506 extern struct bfd_strtab_hash *_bfd_elf_stringtab_init
1507 (void);
1509 extern struct elf_strtab_hash * _bfd_elf_strtab_init
1510 (void);
1511 extern void _bfd_elf_strtab_free
1512 (struct elf_strtab_hash *);
1513 extern bfd_size_type _bfd_elf_strtab_add
1514 (struct elf_strtab_hash *, const char *, bfd_boolean);
1515 extern void _bfd_elf_strtab_addref
1516 (struct elf_strtab_hash *, bfd_size_type);
1517 extern void _bfd_elf_strtab_delref
1518 (struct elf_strtab_hash *, bfd_size_type);
1519 extern void _bfd_elf_strtab_clear_all_refs
1520 (struct elf_strtab_hash *);
1521 extern bfd_size_type _bfd_elf_strtab_size
1522 (struct elf_strtab_hash *);
1523 extern bfd_size_type _bfd_elf_strtab_offset
1524 (struct elf_strtab_hash *, bfd_size_type);
1525 extern bfd_boolean _bfd_elf_strtab_emit
1526 (bfd *, struct elf_strtab_hash *);
1527 extern void _bfd_elf_strtab_finalize
1528 (struct elf_strtab_hash *);
1530 extern bfd_boolean _bfd_elf_discard_section_eh_frame
1531 (bfd *, struct bfd_link_info *, asection *,
1532 bfd_boolean (*) (bfd_vma, void *), struct elf_reloc_cookie *);
1533 extern bfd_boolean _bfd_elf_discard_section_eh_frame_hdr
1534 (bfd *, struct bfd_link_info *);
1535 extern bfd_vma _bfd_elf_eh_frame_section_offset
1536 (bfd *, struct bfd_link_info *, asection *, bfd_vma);
1537 extern bfd_boolean _bfd_elf_write_section_eh_frame
1538 (bfd *, struct bfd_link_info *, asection *, bfd_byte *);
1539 extern bfd_boolean _bfd_elf_write_section_eh_frame_hdr
1540 (bfd *, struct bfd_link_info *);
1541 extern bfd_boolean _bfd_elf_maybe_strip_eh_frame_hdr
1542 (struct bfd_link_info *);
1544 extern bfd_boolean _bfd_elf_merge_symbol
1545 (bfd *, struct bfd_link_info *, const char *, Elf_Internal_Sym *,
1546 asection **, bfd_vma *, struct elf_link_hash_entry **, bfd_boolean *,
1547 bfd_boolean *, bfd_boolean *, bfd_boolean *);
1549 extern bfd_boolean _bfd_elf_add_default_symbol
1550 (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
1551 const char *, Elf_Internal_Sym *, asection **, bfd_vma *,
1552 bfd_boolean *, bfd_boolean);
1554 extern bfd_boolean _bfd_elf_export_symbol
1555 (struct elf_link_hash_entry *, void *);
1557 extern bfd_boolean _bfd_elf_link_find_version_dependencies
1558 (struct elf_link_hash_entry *, void *);
1560 extern bfd_boolean _bfd_elf_link_assign_sym_version
1561 (struct elf_link_hash_entry *, void *);
1563 extern long _bfd_elf_link_lookup_local_dynindx
1564 (struct bfd_link_info *, bfd *, long);
1565 extern bfd_boolean _bfd_elf_compute_section_file_positions
1566 (bfd *, struct bfd_link_info *);
1567 extern void _bfd_elf_assign_file_positions_for_relocs
1568 (bfd *);
1569 extern file_ptr _bfd_elf_assign_file_position_for_section
1570 (Elf_Internal_Shdr *, file_ptr, bfd_boolean);
1572 extern bfd_boolean _bfd_elf_validate_reloc
1573 (bfd *, arelent *);
1575 extern bfd_boolean _bfd_elf_link_create_dynamic_sections
1576 (bfd *, struct bfd_link_info *);
1577 extern bfd_boolean _bfd_elf_link_omit_section_dynsym
1578 (bfd *, struct bfd_link_info *, asection *);
1579 extern bfd_boolean _bfd_elf_create_dynamic_sections
1580 (bfd *, struct bfd_link_info *);
1581 extern bfd_boolean _bfd_elf_create_got_section
1582 (bfd *, struct bfd_link_info *);
1583 extern unsigned long _bfd_elf_link_renumber_dynsyms
1584 (bfd *, struct bfd_link_info *);
1586 extern bfd_boolean _bfd_elfcore_make_pseudosection
1587 (bfd *, char *, size_t, ufile_ptr);
1588 extern char *_bfd_elfcore_strndup
1589 (bfd *, char *, size_t);
1591 extern Elf_Internal_Rela *_bfd_elf_link_read_relocs
1592 (bfd *, asection *, void *, Elf_Internal_Rela *, bfd_boolean);
1594 extern bfd_boolean _bfd_elf_link_size_reloc_section
1595 (bfd *, Elf_Internal_Shdr *, asection *);
1597 extern bfd_boolean _bfd_elf_link_output_relocs
1598 (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *);
1600 extern bfd_boolean _bfd_elf_fix_symbol_flags
1601 (struct elf_link_hash_entry *, struct elf_info_failed *);
1603 extern bfd_boolean _bfd_elf_adjust_dynamic_symbol
1604 (struct elf_link_hash_entry *, void *);
1606 extern bfd_boolean _bfd_elf_link_sec_merge_syms
1607 (struct elf_link_hash_entry *, void *);
1609 extern bfd_boolean _bfd_elf_dynamic_symbol_p
1610 (struct elf_link_hash_entry *, struct bfd_link_info *, bfd_boolean);
1612 extern bfd_boolean _bfd_elf_symbol_refs_local_p
1613 (struct elf_link_hash_entry *, struct bfd_link_info *, bfd_boolean);
1615 extern bfd_boolean bfd_elf_match_symbols_in_sections
1616 (asection *sec1, asection *sec2);
1618 extern bfd_boolean _bfd_elf_setup_group_pointers
1619 (bfd *);
1621 extern const bfd_target *bfd_elf32_object_p
1622 (bfd *);
1623 extern const bfd_target *bfd_elf32_core_file_p
1624 (bfd *);
1625 extern char *bfd_elf32_core_file_failing_command
1626 (bfd *);
1627 extern int bfd_elf32_core_file_failing_signal
1628 (bfd *);
1629 extern bfd_boolean bfd_elf32_core_file_matches_executable_p
1630 (bfd *, bfd *);
1632 extern void bfd_elf32_swap_symbol_in
1633 (bfd *, const void *, const void *, Elf_Internal_Sym *);
1634 extern void bfd_elf32_swap_symbol_out
1635 (bfd *, const Elf_Internal_Sym *, void *, void *);
1636 extern void bfd_elf32_swap_reloc_in
1637 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
1638 extern void bfd_elf32_swap_reloc_out
1639 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
1640 extern void bfd_elf32_swap_reloca_in
1641 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
1642 extern void bfd_elf32_swap_reloca_out
1643 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
1644 extern void bfd_elf32_swap_phdr_in
1645 (bfd *, const Elf32_External_Phdr *, Elf_Internal_Phdr *);
1646 extern void bfd_elf32_swap_phdr_out
1647 (bfd *, const Elf_Internal_Phdr *, Elf32_External_Phdr *);
1648 extern void bfd_elf32_swap_dyn_in
1649 (bfd *, const void *, Elf_Internal_Dyn *);
1650 extern void bfd_elf32_swap_dyn_out
1651 (bfd *, const Elf_Internal_Dyn *, void *);
1652 extern long bfd_elf32_slurp_symbol_table
1653 (bfd *, asymbol **, bfd_boolean);
1654 extern bfd_boolean bfd_elf32_write_shdrs_and_ehdr
1655 (bfd *);
1656 extern int bfd_elf32_write_out_phdrs
1657 (bfd *, const Elf_Internal_Phdr *, unsigned int);
1658 extern void bfd_elf32_write_relocs
1659 (bfd *, asection *, void *);
1660 extern bfd_boolean bfd_elf32_slurp_reloc_table
1661 (bfd *, asection *, asymbol **, bfd_boolean);
1663 extern const bfd_target *bfd_elf64_object_p
1664 (bfd *);
1665 extern const bfd_target *bfd_elf64_core_file_p
1666 (bfd *);
1667 extern char *bfd_elf64_core_file_failing_command
1668 (bfd *);
1669 extern int bfd_elf64_core_file_failing_signal
1670 (bfd *);
1671 extern bfd_boolean bfd_elf64_core_file_matches_executable_p
1672 (bfd *, bfd *);
1674 extern void bfd_elf64_swap_symbol_in
1675 (bfd *, const void *, const void *, Elf_Internal_Sym *);
1676 extern void bfd_elf64_swap_symbol_out
1677 (bfd *, const Elf_Internal_Sym *, void *, void *);
1678 extern void bfd_elf64_swap_reloc_in
1679 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
1680 extern void bfd_elf64_swap_reloc_out
1681 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
1682 extern void bfd_elf64_swap_reloca_in
1683 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
1684 extern void bfd_elf64_swap_reloca_out
1685 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
1686 extern void bfd_elf64_swap_phdr_in
1687 (bfd *, const Elf64_External_Phdr *, Elf_Internal_Phdr *);
1688 extern void bfd_elf64_swap_phdr_out
1689 (bfd *, const Elf_Internal_Phdr *, Elf64_External_Phdr *);
1690 extern void bfd_elf64_swap_dyn_in
1691 (bfd *, const void *, Elf_Internal_Dyn *);
1692 extern void bfd_elf64_swap_dyn_out
1693 (bfd *, const Elf_Internal_Dyn *, void *);
1694 extern long bfd_elf64_slurp_symbol_table
1695 (bfd *, asymbol **, bfd_boolean);
1696 extern bfd_boolean bfd_elf64_write_shdrs_and_ehdr
1697 (bfd *);
1698 extern int bfd_elf64_write_out_phdrs
1699 (bfd *, const Elf_Internal_Phdr *, unsigned int);
1700 extern void bfd_elf64_write_relocs
1701 (bfd *, asection *, void *);
1702 extern bfd_boolean bfd_elf64_slurp_reloc_table
1703 (bfd *, asection *, asymbol **, bfd_boolean);
1705 extern struct elf_link_hash_entry *_bfd_elf_archive_symbol_lookup
1706 (bfd *, struct bfd_link_info *, const char *);
1707 extern bfd_boolean bfd_elf_link_add_symbols
1708 (bfd *, struct bfd_link_info *);
1709 extern bfd_boolean _bfd_elf_add_dynamic_entry
1710 (struct bfd_link_info *, bfd_vma, bfd_vma);
1712 extern bfd_boolean bfd_elf_link_record_dynamic_symbol
1713 (struct bfd_link_info *, struct elf_link_hash_entry *);
1715 extern int bfd_elf_link_record_local_dynamic_symbol
1716 (struct bfd_link_info *, bfd *, long);
1718 extern bfd_boolean _bfd_elf_close_and_cleanup
1719 (bfd *);
1720 extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn
1721 (bfd *, arelent *, struct bfd_symbol *, void *,
1722 asection *, bfd *, char **);
1724 extern bfd_boolean bfd_elf_final_link
1725 (bfd *, struct bfd_link_info *);
1727 extern bfd_boolean bfd_elf_gc_sections
1728 (bfd *, struct bfd_link_info *);
1730 extern bfd_boolean bfd_elf_gc_record_vtinherit
1731 (bfd *, asection *, struct elf_link_hash_entry *, bfd_vma);
1733 extern bfd_boolean bfd_elf_gc_record_vtentry
1734 (bfd *, asection *, struct elf_link_hash_entry *, bfd_vma);
1736 extern bfd_boolean _bfd_elf_gc_mark
1737 (struct bfd_link_info *, asection *,
1738 asection * (*) (asection *, struct bfd_link_info *, Elf_Internal_Rela *,
1739 struct elf_link_hash_entry *, Elf_Internal_Sym *));
1741 extern bfd_boolean bfd_elf_gc_common_finalize_got_offsets
1742 (bfd *, struct bfd_link_info *);
1744 extern bfd_boolean bfd_elf_gc_common_final_link
1745 (bfd *, struct bfd_link_info *);
1747 extern bfd_boolean bfd_elf_reloc_symbol_deleted_p
1748 (bfd_vma, void *);
1750 extern struct elf_segment_map *
1751 _bfd_elf_make_dynamic_segment
1752 (bfd *, asection *);
1754 /* Exported interface for writing elf corefile notes. */
1755 extern char *elfcore_write_note
1756 (bfd *, char *, int *, const char *, int, const void *, int);
1757 extern char *elfcore_write_prpsinfo
1758 (bfd *, char *, int *, const char *, const char *);
1759 extern char *elfcore_write_prstatus
1760 (bfd *, char *, int *, long, int, const void *);
1761 extern char * elfcore_write_pstatus
1762 (bfd *, char *, int *, long, int, const void *);
1763 extern char *elfcore_write_prfpreg
1764 (bfd *, char *, int *, const void *, int);
1765 extern char *elfcore_write_prxfpreg
1766 (bfd *, char *, int *, const void *, int);
1767 extern char *elfcore_write_lwpstatus
1768 (bfd *, char *, int *, long, int, const void *);
1770 extern bfd *_bfd_elf32_bfd_from_remote_memory
1771 (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep,
1772 int (*target_read_memory) (bfd_vma, char *, int));
1773 extern bfd *_bfd_elf64_bfd_from_remote_memory
1774 (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep,
1775 int (*target_read_memory) (bfd_vma, char *, int));
1777 /* SH ELF specific routine. */
1779 extern bfd_boolean _sh_elf_set_mach_from_flags
1780 (bfd *);
1782 /* This is the condition under which finish_dynamic_symbol will be called.
1783 If our finish_dynamic_symbol isn't called, we'll need to do something
1784 about initializing any .plt and .got entries in relocate_section. */
1785 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
1786 ((DYN) \
1787 && ((SHARED) || !(H)->forced_local) \
1788 && ((H)->dynindx != -1 || (H)->forced_local))
1790 /* This macro is to avoid lots of duplicated code in the body
1791 of xxx_relocate_section() in the various elfxx-xxxx.c files. */
1792 #define RELOC_FOR_GLOBAL_SYMBOL(info, input_bfd, input_section, rel, \
1793 r_symndx, symtab_hdr, sym_hashes, \
1794 h, sec, relocation, \
1795 unresolved_reloc, warned) \
1796 do \
1798 /* It seems this can happen with erroneous or unsupported \
1799 input (mixing a.out and elf in an archive, for example.) */ \
1800 if (sym_hashes == NULL) \
1801 return FALSE; \
1803 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; \
1805 while (h->root.type == bfd_link_hash_indirect \
1806 || h->root.type == bfd_link_hash_warning) \
1807 h = (struct elf_link_hash_entry *) h->root.u.i.link; \
1809 warned = FALSE; \
1810 unresolved_reloc = FALSE; \
1811 relocation = 0; \
1812 if (h->root.type == bfd_link_hash_defined \
1813 || h->root.type == bfd_link_hash_defweak) \
1815 sec = h->root.u.def.section; \
1816 if (sec == NULL \
1817 || sec->output_section == NULL) \
1818 /* Set a flag that will be cleared later if we find a \
1819 relocation value for this symbol. output_section \
1820 is typically NULL for symbols satisfied by a shared \
1821 library. */ \
1822 unresolved_reloc = TRUE; \
1823 else \
1824 relocation = (h->root.u.def.value \
1825 + sec->output_section->vma \
1826 + sec->output_offset); \
1828 else if (h->root.type == bfd_link_hash_undefweak) \
1830 else if (info->unresolved_syms_in_objects == RM_IGNORE \
1831 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) \
1833 else \
1835 bfd_boolean err; \
1836 err = (info->unresolved_syms_in_objects == RM_GENERATE_ERROR \
1837 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT); \
1838 if (!info->callbacks->undefined_symbol (info, \
1839 h->root.root.string, \
1840 input_bfd, \
1841 input_section, \
1842 rel->r_offset, err)) \
1843 return FALSE; \
1844 warned = TRUE; \
1847 while (0)
1849 #endif /* _LIBELF_H_ */