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, 2005, 2006 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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
25 #include "elf/common.h"
26 #include "elf/internal.h"
27 #include "elf/external.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. */
38 #define NAME(x, y) x ## 64 ## _ ## y
41 #define NAME(x, y) x ## 32 ## _ ## y
46 #define NAME(x, y) x ## NOSIZE ## _ ## y
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. */
61 /* ELF symbol information. */
62 Elf_Internal_Sym internal_elf_sym;
63 /* Backend specific information. */
66 unsigned int hppa_arg_reloc;
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;
79 struct elf_strtab_hash;
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. */
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. */
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. */
118 bfd_signed_vma refcount;
120 struct got_entry *glist;
121 struct plt_entry *plist;
124 /* Same, but tracks a procedure linkage table entry. */
125 union gotplt_union plt;
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 forced to be dynamic due to a version script file. */
159 unsigned int dynamic : 1;
160 /* Symbol was marked during garbage collection. */
161 unsigned int mark : 1;
162 /* Symbol is referenced by a non-GOT/non-PLT relocation. This is
163 not currently set by all the backends. */
164 unsigned int non_got_ref : 1;
165 /* Symbol has a definition in a shared object.
166 FIXME: There is no real need for this field if def_dynamic is never
167 cleared and all places that test def_dynamic also test def_regular. */
168 unsigned int dynamic_def : 1;
169 /* Symbol is weak in all shared objects. */
170 unsigned int dynamic_weak : 1;
171 /* Symbol is referenced with a relocation where C/C++ pointer equality
173 unsigned int pointer_equality_needed : 1;
175 /* String table index in .dynstr if this is a dynamic symbol. */
176 unsigned long dynstr_index;
180 /* If this is a weak defined symbol from a dynamic object, this
181 field points to a defined symbol with the same value, if there is
182 one. Otherwise it is NULL. */
183 struct elf_link_hash_entry *weakdef;
185 /* Hash value of the name computed using the ELF hash function.
186 Used part way through size_dynamic_sections, after we've finished
188 unsigned long elf_hash_value;
191 /* Version information. */
194 /* This field is used for a symbol which is not defined in a
195 regular object. It points to the version information read in
196 from the dynamic object. */
197 Elf_Internal_Verdef *verdef;
198 /* This field is used for a symbol which is defined in a regular
199 object. It is set up in size_dynamic_sections. It points to
200 the version information we should write out for this symbol. */
201 struct bfd_elf_version_tree *vertree;
206 /* Virtual table entry use information. This array is nominally of size
207 size/sizeof(target_void_pointer), though we have to be able to assume
208 and track a size while the symbol is still undefined. It is indexed
209 via offset/sizeof(target_void_pointer). */
213 /* Virtual table derivation info. */
214 struct elf_link_hash_entry *parent;
218 /* Will references to this symbol always reference the symbol
219 in this object? STV_PROTECTED is excluded from the visibility test
220 here so that function pointer comparisons work properly. Since
221 function symbols not defined in an app are set to their .plt entry,
222 it's necessary for shared libs to also reference the .plt even
223 though the symbol is really local to the shared lib. */
224 #define SYMBOL_REFERENCES_LOCAL(INFO, H) \
225 _bfd_elf_symbol_refs_local_p (H, INFO, 0)
227 /* Will _calls_ to this symbol always call the version in this object? */
228 #define SYMBOL_CALLS_LOCAL(INFO, H) \
229 _bfd_elf_symbol_refs_local_p (H, INFO, 1)
231 /* Common symbols that are turned into definitions don't have the
232 DEF_REGULAR flag set, so they might appear to be undefined. */
233 #define ELF_COMMON_DEF_P(H) \
235 && !(H)->def_dynamic \
236 && (H)->root.type == bfd_link_hash_defined)
238 /* Records local symbols to be emitted in the dynamic symbol table. */
240 struct elf_link_local_dynamic_entry
242 struct elf_link_local_dynamic_entry *next;
244 /* The input bfd this symbol came from. */
247 /* The index of the local symbol being copied. */
250 /* The index in the outgoing dynamic symbol table. */
253 /* A copy of the input symbol. */
254 Elf_Internal_Sym isym;
257 struct elf_link_loaded_list
259 struct elf_link_loaded_list *next;
263 /* Structures used by the eh_frame optimization code. */
272 struct cie_header hdr;
273 unsigned char version;
274 char augmentation[20];
276 bfd_signed_vma data_align;
278 bfd_vma augmentation_size;
279 struct elf_link_hash_entry *personality;
280 unsigned char per_encoding;
281 unsigned char lsda_encoding;
282 unsigned char fde_encoding;
283 unsigned char initial_insn_length;
284 unsigned char make_relative;
285 unsigned char make_lsda_relative;
286 unsigned char initial_instructions[50];
291 /* For FDEs, this points to the CIE used. */
292 struct eh_cie_fde *cie_inf;
295 unsigned int new_offset;
296 unsigned char fde_encoding;
297 unsigned char lsda_encoding;
298 unsigned char lsda_offset;
299 unsigned int cie : 1;
300 unsigned int removed : 1;
301 unsigned int add_augmentation_size : 1;
302 unsigned int add_fde_encoding : 1;
303 unsigned int make_relative : 1;
304 unsigned int make_lsda_relative : 1;
305 unsigned int need_lsda_relative : 1;
306 unsigned int per_encoding_relative : 1;
307 unsigned int *set_loc;
310 struct eh_frame_sec_info
313 unsigned int alloced;
314 struct eh_cie_fde entry[1];
317 struct eh_frame_array_ent
323 struct eh_frame_hdr_info
326 asection *last_cie_sec;
327 struct eh_cie_fde *last_cie_inf;
329 unsigned int fde_count, array_count;
330 struct eh_frame_array_ent *array;
331 /* TRUE if .eh_frame_hdr should contain the sorted search table.
332 We build it if we successfully read all .eh_frame input sections
333 and recognize them. */
335 bfd_boolean offsets_adjusted;
338 /* ELF linker hash table. */
340 struct elf_link_hash_table
342 struct bfd_link_hash_table root;
344 /* Whether we have created the special dynamic sections required
345 when linking against or generating a shared object. */
346 bfd_boolean dynamic_sections_created;
348 /* The BFD used to hold special sections created by the linker.
349 This will be the first BFD found which requires these sections to
353 /* The value to use when initialising got.refcount/offset and
354 plt.refcount/offset in an elf_link_hash_entry. Set to zero when
355 the values are refcounts. Set to init_got_offset/init_plt_offset
356 in size_dynamic_sections when the values may be offsets. */
357 union gotplt_union init_got_refcount;
358 union gotplt_union init_plt_refcount;
360 /* The value to use for got.refcount/offset and plt.refcount/offset
361 when the values may be offsets. Normally (bfd_vma) -1. */
362 union gotplt_union init_got_offset;
363 union gotplt_union init_plt_offset;
365 /* The number of symbols found in the link which must be put into
366 the .dynsym section. */
367 bfd_size_type dynsymcount;
369 /* The string table of dynamic symbols, which becomes the .dynstr
371 struct elf_strtab_hash *dynstr;
373 /* The number of buckets in the hash table in the .hash section.
374 This is based on the number of dynamic symbols. */
375 bfd_size_type bucketcount;
377 /* A linked list of DT_NEEDED names found in dynamic objects
378 included in the link. */
379 struct bfd_link_needed_list *needed;
381 /* The _GLOBAL_OFFSET_TABLE_ symbol. */
382 struct elf_link_hash_entry *hgot;
384 /* The _PROCEDURE_LINKAGE_TABLE_ symbol. */
385 struct elf_link_hash_entry *hplt;
387 /* A pointer to information used to merge SEC_MERGE sections. */
390 /* Used to link stabs in sections. */
391 struct stab_info stab_info;
393 /* Used by eh_frame code when editing .eh_frame. */
394 struct eh_frame_hdr_info eh_info;
396 /* A linked list of local symbols to be added to .dynsym. */
397 struct elf_link_local_dynamic_entry *dynlocal;
399 /* A linked list of DT_RPATH/DT_RUNPATH names found in dynamic
400 objects included in the link. */
401 struct bfd_link_needed_list *runpath;
403 /* Cached first output tls section and size of PT_TLS segment. */
405 bfd_size_type tls_size;
407 /* A linked list of BFD's loaded in the link. */
408 struct elf_link_loaded_list *loaded;
410 /* True if this target has relocatable executables, so needs dynamic
412 bfd_boolean is_relocatable_executable;
415 /* Look up an entry in an ELF linker hash table. */
417 #define elf_link_hash_lookup(table, string, create, copy, follow) \
418 ((struct elf_link_hash_entry *) \
419 bfd_link_hash_lookup (&(table)->root, (string), (create), \
422 /* Traverse an ELF linker hash table. */
424 #define elf_link_hash_traverse(table, func, info) \
425 (bfd_link_hash_traverse \
427 (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func), \
430 /* Get the ELF linker hash table from a link_info structure. */
432 #define elf_hash_table(p) ((struct elf_link_hash_table *) ((p)->hash))
434 /* Returns TRUE if the hash table is a struct elf_link_hash_table. */
435 #define is_elf_hash_table(htab) \
436 (((struct bfd_link_hash_table *) (htab))->type == bfd_link_elf_hash_table)
438 /* Used by bfd_section_from_r_symndx to cache a small number of local
439 symbol to section mappings. */
440 #define LOCAL_SYM_CACHE_SIZE 32
444 unsigned long indx[LOCAL_SYM_CACHE_SIZE];
445 asection *sec[LOCAL_SYM_CACHE_SIZE];
448 /* Constant information held for an ELF backend. */
450 struct elf_size_info {
451 unsigned char sizeof_ehdr, sizeof_phdr, sizeof_shdr;
452 unsigned char sizeof_rel, sizeof_rela, sizeof_sym, sizeof_dyn, sizeof_note;
454 /* The size of entries in the .hash section. */
455 unsigned char sizeof_hash_entry;
457 /* The number of internal relocations to allocate per external
459 unsigned char int_rels_per_ext_rel;
460 /* We use some fixed size arrays. This should be large enough to
461 handle all back-ends. */
462 #define MAX_INT_RELS_PER_EXT_REL 3
464 unsigned char arch_size, log_file_align;
465 unsigned char elfclass, ev_current;
466 int (*write_out_phdrs)
467 (bfd *, const Elf_Internal_Phdr *, unsigned int);
469 (*write_shdrs_and_ehdr) (bfd *);
471 (bfd *, asection *, void *);
472 bfd_boolean (*swap_symbol_in)
473 (bfd *, const void *, const void *, Elf_Internal_Sym *);
474 void (*swap_symbol_out)
475 (bfd *, const Elf_Internal_Sym *, void *, void *);
476 bfd_boolean (*slurp_reloc_table)
477 (bfd *, asection *, asymbol **, bfd_boolean);
478 long (*slurp_symbol_table)
479 (bfd *, asymbol **, bfd_boolean);
481 (bfd *, const void *, Elf_Internal_Dyn *);
483 (bfd *, const Elf_Internal_Dyn *, void *);
485 /* This function is called to swap in a REL relocation. If an
486 external relocation corresponds to more than one internal
487 relocation, then all relocations are swapped in at once. */
488 void (*swap_reloc_in)
489 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
491 /* This function is called to swap out a REL relocation. */
492 void (*swap_reloc_out)
493 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
495 /* This function is called to swap in a RELA relocation. If an
496 external relocation corresponds to more than one internal
497 relocation, then all relocations are swapped in at once. */
498 void (*swap_reloca_in)
499 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
501 /* This function is called to swap out a RELA relocation. */
502 void (*swap_reloca_out)
503 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
506 #define elf_symbol_from(ABFD,S) \
507 (((S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \
508 && (S)->the_bfd->tdata.elf_obj_data != 0) \
509 ? (elf_symbol_type *) (S) \
512 enum elf_reloc_type_class {
514 reloc_class_relative,
519 struct elf_reloc_cookie
521 Elf_Internal_Rela *rels, *rel, *relend;
522 Elf_Internal_Sym *locsyms;
526 struct elf_link_hash_entry **sym_hashes;
528 bfd_boolean bad_symtab;
531 /* The level of IRIX compatibility we're striving for. */
539 /* Mapping of ELF section names and types. */
540 struct bfd_elf_special_section
544 /* 0 means name must match PREFIX exactly.
545 -1 means name must start with PREFIX followed by an arbitrary string.
546 -2 means name must match PREFIX exactly or consist of PREFIX followed
547 by a dot then anything.
548 > 0 means name must start with the first PREFIX_LENGTH chars of
549 PREFIX and finish with the last SUFFIX_LENGTH chars of PREFIX. */
555 enum action_discarded
561 struct elf_backend_data
563 /* The architecture for this backend. */
564 enum bfd_architecture arch;
566 /* The ELF machine code (EM_xxxx) for this backend. */
567 int elf_machine_code;
569 /* The maximum page size for this backend. */
572 /* The minimum page size for this backend. An input object will not be
573 considered page aligned unless its sections are correctly aligned for
574 pages at least this large. May be smaller than maxpagesize. */
577 /* The common page size for this backend. */
578 bfd_vma commonpagesize;
580 /* The BFD flags applied to sections created for dynamic linking. */
581 flagword dynamic_sec_flags;
583 /* A function to translate an ELF RELA relocation to a BFD arelent
585 void (*elf_info_to_howto)
586 (bfd *, arelent *, Elf_Internal_Rela *);
588 /* A function to translate an ELF REL relocation to a BFD arelent
590 void (*elf_info_to_howto_rel)
591 (bfd *, arelent *, Elf_Internal_Rela *);
593 /* A function to determine whether a symbol is global when
594 partitioning the symbol table into local and global symbols.
595 This should be NULL for most targets, in which case the correct
596 thing will be done. MIPS ELF, at least on the Irix 5, has
597 special requirements. */
598 bfd_boolean (*elf_backend_sym_is_global)
601 /* The remaining functions are hooks which are called only if they
604 /* A function to permit a backend specific check on whether a
605 particular BFD format is relevant for an object file, and to
606 permit the backend to set any global information it wishes. When
607 this is called elf_elfheader is set, but anything else should be
608 used with caution. If this returns FALSE, the check_format
609 routine will return a bfd_error_wrong_format error. */
610 bfd_boolean (*elf_backend_object_p)
613 /* A function to do additional symbol processing when reading the
614 ELF symbol table. This is where any processor-specific special
615 section indices are handled. */
616 void (*elf_backend_symbol_processing)
619 /* A function to do additional symbol processing after reading the
620 entire ELF symbol table. */
621 bfd_boolean (*elf_backend_symbol_table_processing)
622 (bfd *, elf_symbol_type *, unsigned int);
624 /* A function to set the type of the info field. Processor-specific
625 types should be handled here. */
626 int (*elf_backend_get_symbol_type)
627 (Elf_Internal_Sym *, int);
629 /* A function to return the linker hash table entry of a symbol that
630 might be satisfied by an archive symbol. */
631 struct elf_link_hash_entry * (*elf_backend_archive_symbol_lookup)
632 (bfd *, struct bfd_link_info *, const char *);
634 /* Return true if local section symbols should have a non-null st_name.
635 NULL implies false. */
636 bfd_boolean (*elf_backend_name_local_section_symbols)
639 /* A function to do additional processing on the ELF section header
640 just before writing it out. This is used to set the flags and
641 type fields for some sections, or to actually write out data for
643 bfd_boolean (*elf_backend_section_processing)
644 (bfd *, Elf_Internal_Shdr *);
646 /* A function to handle unusual section types when creating BFD
647 sections from ELF sections. */
648 bfd_boolean (*elf_backend_section_from_shdr)
649 (bfd *, Elf_Internal_Shdr *, const char *, int);
651 /* A function to convert machine dependent ELF section header flags to
652 BFD internal section header flags. */
653 bfd_boolean (*elf_backend_section_flags)
654 (flagword *, const Elf_Internal_Shdr *);
656 /* A function that returns a struct containing ELF section flags and
657 type for the given BFD section. */
658 const struct bfd_elf_special_section * (*get_sec_type_attr)
661 /* A function to handle unusual program segment types when creating BFD
662 sections from ELF program segments. */
663 bfd_boolean (*elf_backend_section_from_phdr)
664 (bfd *, Elf_Internal_Phdr *, int, const char *);
666 /* A function to set up the ELF section header for a BFD section in
667 preparation for writing it out. This is where the flags and type
668 fields are set for unusual sections. */
669 bfd_boolean (*elf_backend_fake_sections)
670 (bfd *, Elf_Internal_Shdr *, asection *);
672 /* A function to get the ELF section index for a BFD section. If
673 this returns TRUE, the section was found. If it is a normal ELF
674 section, *RETVAL should be left unchanged. If it is not a normal
675 ELF section *RETVAL should be set to the SHN_xxxx index. */
676 bfd_boolean (*elf_backend_section_from_bfd_section)
677 (bfd *, asection *, int *retval);
679 /* If this field is not NULL, it is called by the add_symbols phase
680 of a link just before adding a symbol to the global linker hash
681 table. It may modify any of the fields as it wishes. If *NAME
682 is set to NULL, the symbol will be skipped rather than being
683 added to the hash table. This function is responsible for
684 handling all processor dependent symbol bindings and section
685 indices, and must set at least *FLAGS and *SEC for each processor
686 dependent case; failure to do so will cause a link error. */
687 bfd_boolean (*elf_add_symbol_hook)
688 (bfd *abfd, struct bfd_link_info *info, Elf_Internal_Sym *,
689 const char **name, flagword *flags, asection **sec, bfd_vma *value);
691 /* If this field is not NULL, it is called by the elf_link_output_sym
692 phase of a link for each symbol which will appear in the object file. */
693 bfd_boolean (*elf_backend_link_output_symbol_hook)
694 (struct bfd_link_info *info, const char *, Elf_Internal_Sym *,
695 asection *, struct elf_link_hash_entry *);
697 /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend
698 linker the first time it encounters a dynamic object in the link.
699 This function must create any sections required for dynamic
700 linking. The ABFD argument is a dynamic object. The .interp,
701 .dynamic, .dynsym, .dynstr, and .hash functions have already been
702 created, and this function may modify the section flags if
703 desired. This function will normally create the .got and .plt
704 sections, but different backends have different requirements. */
705 bfd_boolean (*elf_backend_create_dynamic_sections)
706 (bfd *abfd, struct bfd_link_info *info);
708 /* When creating a shared library, determine whether to omit the
709 dynamic symbol for the section. */
710 bfd_boolean (*elf_backend_omit_section_dynsym)
711 (bfd *output_bfd, struct bfd_link_info *info, asection *osec);
713 /* The CHECK_RELOCS function is called by the add_symbols phase of
714 the ELF backend linker. It is called once for each section with
715 relocs of an object file, just after the symbols for the object
716 file have been added to the global linker hash table. The
717 function must look through the relocs and do any special handling
718 required. This generally means allocating space in the global
719 offset table, and perhaps allocating space for a reloc. The
720 relocs are always passed as Rela structures; if the section
721 actually uses Rel structures, the r_addend field will always be
723 bfd_boolean (*check_relocs)
724 (bfd *abfd, struct bfd_link_info *info, asection *o,
725 const Elf_Internal_Rela *relocs);
727 /* The CHECK_DIRECTIVES function is called once per input file by
728 the add_symbols phase of the ELF backend linker. The function
729 must inspect the bfd and create any additional symbols according
730 to any custom directives in the bfd. */
731 bfd_boolean (*check_directives)
732 (bfd *abfd, struct bfd_link_info *info);
734 /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
735 linker for every symbol which is defined by a dynamic object and
736 referenced by a regular object. This is called after all the
737 input files have been seen, but before the SIZE_DYNAMIC_SECTIONS
738 function has been called. The hash table entry should be
739 bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be
740 defined in a section from a dynamic object. Dynamic object
741 sections are not included in the final link, and this function is
742 responsible for changing the value to something which the rest of
743 the link can deal with. This will normally involve adding an
744 entry to the .plt or .got or some such section, and setting the
745 symbol to point to that. */
746 bfd_boolean (*elf_backend_adjust_dynamic_symbol)
747 (struct bfd_link_info *info, struct elf_link_hash_entry *h);
749 /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker
750 after all the linker input files have been seen but before the
751 section sizes have been set. This is called after
752 ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS. */
753 bfd_boolean (*elf_backend_always_size_sections)
754 (bfd *output_bfd, struct bfd_link_info *info);
756 /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend
757 linker after all the linker input files have been seen but before
758 the sections sizes have been set. This is called after
759 ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols.
760 It is only called when linking against a dynamic object. It must
761 set the sizes of the dynamic sections, and may fill in their
762 contents as well. The generic ELF linker can handle the .dynsym,
763 .dynstr and .hash sections. This function must handle the
764 .interp section and any sections created by the
765 CREATE_DYNAMIC_SECTIONS entry point. */
766 bfd_boolean (*elf_backend_size_dynamic_sections)
767 (bfd *output_bfd, struct bfd_link_info *info);
769 /* The RELOCATE_SECTION function is called by the ELF backend linker
770 to handle the relocations for a section.
772 The relocs are always passed as Rela structures; if the section
773 actually uses Rel structures, the r_addend field will always be
776 This function is responsible for adjust the section contents as
777 necessary, and (if using Rela relocs and generating a
778 relocatable output file) adjusting the reloc addend as
781 This function does not have to worry about setting the reloc
782 address or the reloc symbol index.
784 LOCAL_SYMS is a pointer to the swapped in local symbols.
786 LOCAL_SECTIONS is an array giving the section in the input file
787 corresponding to the st_shndx field of each local symbol.
789 The global hash table entry for the global symbols can be found
790 via elf_sym_hashes (input_bfd).
792 When generating relocatable output, this function must handle
793 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
794 going to be the section symbol corresponding to the output
795 section, which means that the addend must be adjusted
797 bfd_boolean (*elf_backend_relocate_section)
798 (bfd *output_bfd, struct bfd_link_info *info, bfd *input_bfd,
799 asection *input_section, bfd_byte *contents, Elf_Internal_Rela *relocs,
800 Elf_Internal_Sym *local_syms, asection **local_sections);
802 /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend
803 linker just before it writes a symbol out to the .dynsym section.
804 The processor backend may make any required adjustment to the
805 symbol. It may also take the opportunity to set contents of the
806 dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on
807 all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called
808 on those symbols which are defined by a dynamic object. */
809 bfd_boolean (*elf_backend_finish_dynamic_symbol)
810 (bfd *output_bfd, struct bfd_link_info *info,
811 struct elf_link_hash_entry *h, Elf_Internal_Sym *sym);
813 /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend
814 linker just before it writes all the dynamic sections out to the
815 output file. The FINISH_DYNAMIC_SYMBOL will have been called on
816 all dynamic symbols. */
817 bfd_boolean (*elf_backend_finish_dynamic_sections)
818 (bfd *output_bfd, struct bfd_link_info *info);
820 /* A function to do any beginning processing needed for the ELF file
821 before building the ELF headers and computing file positions. */
822 void (*elf_backend_begin_write_processing)
823 (bfd *, struct bfd_link_info *);
825 /* A function to do any final processing needed for the ELF file
826 before writing it out. The LINKER argument is TRUE if this BFD
827 was created by the ELF backend linker. */
828 void (*elf_backend_final_write_processing)
829 (bfd *, bfd_boolean linker);
831 /* This function is called by get_program_header_size. It should
832 return the number of additional program segments which this BFD
833 will need. It should return -1 on error. */
834 int (*elf_backend_additional_program_headers)
835 (bfd *, struct bfd_link_info *);
837 /* This function is called to modify an existing segment map in a
838 backend specific fashion. */
839 bfd_boolean (*elf_backend_modify_segment_map)
840 (bfd *, struct bfd_link_info *);
842 /* This function is called to modify program headers just before
844 bfd_boolean (*elf_backend_modify_program_headers)
845 (bfd *, struct bfd_link_info *);
847 /* This function is called during section garbage collection to
848 mark sections that define global symbols. */
849 bfd_boolean (*gc_mark_dynamic_ref)
850 (struct elf_link_hash_entry *h, void *inf);
852 /* This function is called during section gc to discover the section a
853 particular relocation refers to. */
854 asection * (*gc_mark_hook)
855 (asection *sec, struct bfd_link_info *, Elf_Internal_Rela *,
856 struct elf_link_hash_entry *h, Elf_Internal_Sym *);
858 /* This function, if defined, is called during the sweep phase of gc
859 in order that a backend might update any data structures it might
861 bfd_boolean (*gc_sweep_hook)
862 (bfd *abfd, struct bfd_link_info *info, asection *o,
863 const Elf_Internal_Rela *relocs);
865 /* This function, if defined, is called after the ELF headers have
866 been created. This allows for things like the OS and ABI versions
868 void (*elf_backend_post_process_headers)
869 (bfd *, struct bfd_link_info *);
871 /* This function, if defined, prints a symbol to file and returns the
872 name of the symbol to be printed. It should return NULL to fall
873 back to default symbol printing. */
874 const char *(*elf_backend_print_symbol_all)
875 (bfd *, void *, asymbol *);
877 /* This function, if defined, is called after all local symbols and
878 global symbols converted to locals are emitted into the symtab
879 section. It allows the backend to emit special local symbols
880 not handled in the hash table. */
881 bfd_boolean (*elf_backend_output_arch_local_syms)
882 (bfd *, struct bfd_link_info *, void *,
883 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym *, asection *,
884 struct elf_link_hash_entry *));
886 /* This function, if defined, is called after all symbols are emitted
887 into the symtab section. It allows the backend to emit special
888 global symbols not handled in the hash table. */
889 bfd_boolean (*elf_backend_output_arch_syms)
890 (bfd *, struct bfd_link_info *, void *,
891 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym *, asection *,
892 struct elf_link_hash_entry *));
894 /* Copy any information related to dynamic linking from a pre-existing
895 symbol to a newly created symbol. Also called to copy flags and
896 other back-end info to a weakdef, in which case the symbol is not
897 newly created and plt/got refcounts and dynamic indices should not
899 void (*elf_backend_copy_indirect_symbol)
900 (struct bfd_link_info *, struct elf_link_hash_entry *,
901 struct elf_link_hash_entry *);
903 /* Modify any information related to dynamic linking such that the
904 symbol is not exported. */
905 void (*elf_backend_hide_symbol)
906 (struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean);
908 /* A function to do additional symbol fixup, called by
909 _bfd_elf_fix_symbol_flags. */
910 bfd_boolean (*elf_backend_fixup_symbol)
911 (struct bfd_link_info *, struct elf_link_hash_entry *);
913 /* Merge the backend specific symbol attribute. */
914 void (*elf_backend_merge_symbol_attribute)
915 (struct elf_link_hash_entry *, const Elf_Internal_Sym *, bfd_boolean,
918 /* Decide whether an undefined symbol is special and can be ignored.
919 This is the case for OPTIONAL symbols on IRIX. */
920 bfd_boolean (*elf_backend_ignore_undef_symbol)
921 (struct elf_link_hash_entry *);
923 /* Emit relocations. Overrides default routine for emitting relocs,
924 except during a relocatable link, or if all relocs are being emitted. */
925 bfd_boolean (*elf_backend_emit_relocs)
926 (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *,
927 struct elf_link_hash_entry **);
929 /* Count relocations. Not called for relocatable links
930 or if all relocs are being preserved in the output. */
931 unsigned int (*elf_backend_count_relocs)
932 (asection *, Elf_Internal_Rela *);
934 /* This function, if defined, is called when an NT_PRSTATUS note is found
936 bfd_boolean (*elf_backend_grok_prstatus)
937 (bfd *, Elf_Internal_Note *);
939 /* This function, if defined, is called when an NT_PSINFO or NT_PRPSINFO
940 note is found in a core file. */
941 bfd_boolean (*elf_backend_grok_psinfo)
942 (bfd *, Elf_Internal_Note *);
944 /* Functions to print VMAs. Special code to handle 64 bit ELF files. */
945 void (* elf_backend_sprintf_vma)
946 (bfd *, char *, bfd_vma);
947 void (* elf_backend_fprintf_vma)
948 (bfd *, void *, bfd_vma);
950 /* This function returns class of a reloc type. */
951 enum elf_reloc_type_class (*elf_backend_reloc_type_class)
952 (const Elf_Internal_Rela *);
954 /* This function, if defined, removes information about discarded functions
955 from other sections which mention them. */
956 bfd_boolean (*elf_backend_discard_info)
957 (bfd *, struct elf_reloc_cookie *, struct bfd_link_info *);
959 /* This function, if defined, signals that the function above has removed
960 the discarded relocations for this section. */
961 bfd_boolean (*elf_backend_ignore_discarded_relocs)
964 /* What to do when ld finds relocations against symbols defined in
965 discarded sections. */
966 unsigned int (*action_discarded)
969 /* This function returns the width of FDE pointers in bytes, or 0 if
970 that can't be determined for some reason. The default definition
971 goes by the bfd's EI_CLASS. */
972 unsigned int (*elf_backend_eh_frame_address_size)
975 /* These functions tell elf-eh-frame whether to attempt to turn
976 absolute or lsda encodings into pc-relative ones. The default
977 definition enables these transformations. */
978 bfd_boolean (*elf_backend_can_make_relative_eh_frame)
979 (bfd *, struct bfd_link_info *, asection *);
980 bfd_boolean (*elf_backend_can_make_lsda_relative_eh_frame)
981 (bfd *, struct bfd_link_info *, asection *);
983 /* This function returns an encoding after computing the encoded
984 value (and storing it in ENCODED) for the given OFFSET into OSEC,
985 to be stored in at LOC_OFFSET into the LOC_SEC input section.
986 The default definition chooses a 32-bit PC-relative encoding. */
987 bfd_byte (*elf_backend_encode_eh_address)
988 (bfd *abfd, struct bfd_link_info *info,
989 asection *osec, bfd_vma offset,
990 asection *loc_sec, bfd_vma loc_offset,
993 /* This function, if defined, may write out the given section.
994 Returns TRUE if it did so and FALSE if the caller should. */
995 bfd_boolean (*elf_backend_write_section)
996 (bfd *, asection *, bfd_byte *);
998 /* The level of IRIX compatibility we're striving for.
999 MIPS ELF specific function. */
1000 irix_compat_t (*elf_backend_mips_irix_compat)
1003 reloc_howto_type *(*elf_backend_mips_rtype_to_howto)
1004 (unsigned int, bfd_boolean);
1006 /* The swapping table to use when dealing with ECOFF information.
1007 Used for the MIPS ELF .mdebug section. */
1008 const struct ecoff_debug_swap *elf_backend_ecoff_debug_swap;
1010 /* This function implements `bfd_elf_bfd_from_remote_memory';
1011 see elf.c, elfcode.h. */
1012 bfd *(*elf_backend_bfd_from_remote_memory)
1013 (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep,
1014 int (*target_read_memory) (bfd_vma vma, bfd_byte *myaddr, int len));
1016 /* This function is used by `_bfd_elf_get_synthetic_symtab';
1018 bfd_vma (*plt_sym_val) (bfd_vma, const asection *, const arelent *);
1020 /* Is symbol defined in common section? */
1021 bfd_boolean (*common_definition) (Elf_Internal_Sym *);
1023 /* Return a common section index for section. */
1024 unsigned int (*common_section_index) (asection *);
1026 /* Return a common section for section. */
1027 asection *(*common_section) (asection *);
1029 /* Return TRUE if we can merge 2 definitions. */
1030 bfd_boolean (*merge_symbol) (struct bfd_link_info *,
1031 struct elf_link_hash_entry **,
1032 struct elf_link_hash_entry *,
1033 Elf_Internal_Sym *, asection **,
1034 bfd_vma *, unsigned int *,
1035 bfd_boolean *, bfd_boolean *,
1036 bfd_boolean *, bfd_boolean *,
1037 bfd_boolean *, bfd_boolean *,
1038 bfd_boolean *, bfd_boolean *,
1040 bfd_boolean *, bfd_boolean *,
1041 bfd_boolean *, bfd_boolean *,
1042 bfd *, asection **);
1044 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
1045 bfd_boolean (*elf_hash_symbol) (struct elf_link_hash_entry *);
1047 /* Used to handle bad SHF_LINK_ORDER input. */
1048 bfd_error_handler_type link_order_error_handler;
1050 /* Name of the PLT relocation section. */
1051 const char *relplt_name;
1053 /* Alternate EM_xxxx machine codes for this backend. */
1054 int elf_machine_alt1;
1055 int elf_machine_alt2;
1057 const struct elf_size_info *s;
1059 /* An array of target specific special sections. */
1060 const struct bfd_elf_special_section *special_sections;
1062 /* The size in bytes of the header for the GOT. This includes the
1063 so-called reserved entries on some systems. */
1064 bfd_vma got_header_size;
1066 /* This is TRUE if the linker should act like collect and gather
1067 global constructors and destructors by name. This is TRUE for
1068 MIPS ELF because the Irix 5 tools can not handle the .init
1070 unsigned collect : 1;
1072 /* This is TRUE if the linker should ignore changes to the type of a
1073 symbol. This is TRUE for MIPS ELF because some Irix 5 objects
1074 record undefined functions as STT_OBJECT although the definitions
1076 unsigned type_change_ok : 1;
1078 /* Whether the backend may use REL relocations. (Some backends use
1079 both REL and RELA relocations, and this flag is set for those
1081 unsigned may_use_rel_p : 1;
1083 /* Whether the backend may use RELA relocations. (Some backends use
1084 both REL and RELA relocations, and this flag is set for those
1086 unsigned may_use_rela_p : 1;
1088 /* Whether the default relocation type is RELA. If a backend with
1089 this flag set wants REL relocations for a particular section,
1090 it must note that explicitly. Similarly, if this flag is clear,
1091 and the backend wants RELA relocations for a particular
1093 unsigned default_use_rela_p : 1;
1095 /* Set if RELA relocations for a relocatable link can be handled by
1096 generic code. Backends that set this flag need do nothing in the
1097 backend relocate_section routine for relocatable linking. */
1098 unsigned rela_normal : 1;
1100 /* TRUE if addresses "naturally" sign extend. This is used when
1101 swapping in from Elf32 when BFD64. */
1102 unsigned sign_extend_vma : 1;
1104 unsigned want_got_plt : 1;
1105 unsigned plt_readonly : 1;
1106 unsigned want_plt_sym : 1;
1107 unsigned plt_not_loaded : 1;
1108 unsigned plt_alignment : 4;
1109 unsigned can_gc_sections : 1;
1110 unsigned can_refcount : 1;
1111 unsigned want_got_sym : 1;
1112 unsigned want_dynbss : 1;
1113 /* Targets which do not support physical addressing often require
1114 that the p_paddr field in the section header to be set to zero.
1115 This field indicates whether this behavior is required. */
1116 unsigned want_p_paddr_set_to_zero : 1;
1119 /* Information stored for each BFD section in an ELF file. This
1120 structure is allocated by elf_new_section_hook. */
1122 struct bfd_elf_section_data
1124 /* The ELF header for this section. */
1125 Elf_Internal_Shdr this_hdr;
1127 /* The ELF header for the reloc section associated with this
1129 Elf_Internal_Shdr rel_hdr;
1131 /* If there is a second reloc section associated with this section,
1132 as can happen on Irix 6, this field points to the header. */
1133 Elf_Internal_Shdr *rel_hdr2;
1135 /* The number of relocations currently assigned to REL_HDR. */
1136 unsigned int rel_count;
1138 /* The number of relocations currently assigned to REL_HDR2. */
1139 unsigned int rel_count2;
1141 /* The ELF section number of this section. */
1144 /* The ELF section number of the reloc section indicated by
1145 REL_HDR if any. Only used for an output file. */
1148 /* The ELF section number of the reloc section indicated by
1149 REL_HDR2 if any. Only used for an output file. */
1152 /* Used by the backend linker when generating a shared library to
1153 record the dynamic symbol index for a section symbol
1154 corresponding to this section. A value of 0 means that there is
1155 no dynamic symbol for this section. */
1158 /* A pointer to the linked-to section for SHF_LINK_ORDER. */
1159 asection *linked_to;
1161 /* Used by the backend linker to store the symbol hash table entries
1162 associated with relocs against global symbols. */
1163 struct elf_link_hash_entry **rel_hashes;
1165 /* A pointer to the swapped relocs. If the section uses REL relocs,
1166 rather than RELA, all the r_addend fields will be zero. This
1167 pointer may be NULL. It is used by the backend linker. */
1168 Elf_Internal_Rela *relocs;
1170 /* A pointer to a linked list tracking dynamic relocs copied for
1174 /* A pointer to the bfd section used for dynamic relocs. */
1178 /* Group name, if this section is a member of a group. */
1181 /* Group signature sym, if this is the SHT_GROUP section. */
1182 struct bfd_symbol *id;
1185 /* Optional information about section group; NULL if it doesn't
1186 belongs to any section group. */
1187 asection *sec_group;
1189 /* A linked list of sections in the group. Circular when used by
1191 asection *next_in_group;
1193 /* A pointer used for various section optimizations. */
1197 #define elf_section_data(sec) ((struct bfd_elf_section_data*)(sec)->used_by_bfd)
1198 #define elf_linked_to_section(sec) (elf_section_data(sec)->linked_to)
1199 #define elf_section_type(sec) (elf_section_data(sec)->this_hdr.sh_type)
1200 #define elf_section_flags(sec) (elf_section_data(sec)->this_hdr.sh_flags)
1201 #define elf_group_name(sec) (elf_section_data(sec)->group.name)
1202 #define elf_group_id(sec) (elf_section_data(sec)->group.id)
1203 #define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group)
1204 #define elf_sec_group(sec) (elf_section_data(sec)->sec_group)
1206 /* Return TRUE if section has been discarded. */
1207 #define elf_discarded_section(sec) \
1208 (!bfd_is_abs_section (sec) \
1209 && bfd_is_abs_section ((sec)->output_section) \
1210 && (sec)->sec_info_type != ELF_INFO_TYPE_MERGE \
1211 && (sec)->sec_info_type != ELF_INFO_TYPE_JUST_SYMS)
1213 #define xvec_get_elf_backend_data(xvec) \
1214 ((struct elf_backend_data *) (xvec)->backend_data)
1216 #define get_elf_backend_data(abfd) \
1217 xvec_get_elf_backend_data ((abfd)->xvec)
1219 /* This struct is used to pass information to routines called via
1220 elf_link_hash_traverse which must return failure. */
1222 struct elf_info_failed
1225 struct bfd_link_info *info;
1226 struct bfd_elf_version_tree *verdefs;
1229 /* This structure is used to pass information to
1230 _bfd_elf_link_assign_sym_version. */
1232 struct elf_assign_sym_version_info
1236 /* General link information. */
1237 struct bfd_link_info *info;
1239 struct bfd_elf_version_tree *verdefs;
1240 /* Whether we had a failure. */
1244 /* This structure is used to pass information to
1245 _bfd_elf_link_find_version_dependencies. */
1247 struct elf_find_verdep_info
1251 /* General link information. */
1252 struct bfd_link_info *info;
1253 /* The number of dependencies. */
1255 /* Whether we had a failure. */
1259 /* Some private data is stashed away for future use using the tdata pointer
1260 in the bfd structure. */
1262 struct elf_obj_tdata
1264 Elf_Internal_Ehdr elf_header[1]; /* Actual data, but ref like ptr */
1265 Elf_Internal_Shdr **elf_sect_ptr;
1266 Elf_Internal_Phdr *phdr;
1267 struct elf_segment_map *segment_map;
1268 struct elf_strtab_hash *strtab_ptr;
1271 unsigned int num_elf_sections; /* elf_sect_ptr size */
1272 int num_section_syms;
1273 asymbol **section_syms; /* STT_SECTION symbols for each section */
1274 Elf_Internal_Shdr symtab_hdr;
1275 Elf_Internal_Shdr shstrtab_hdr;
1276 Elf_Internal_Shdr strtab_hdr;
1277 Elf_Internal_Shdr dynsymtab_hdr;
1278 Elf_Internal_Shdr dynstrtab_hdr;
1279 Elf_Internal_Shdr dynversym_hdr;
1280 Elf_Internal_Shdr dynverref_hdr;
1281 Elf_Internal_Shdr dynverdef_hdr;
1282 Elf_Internal_Shdr symtab_shndx_hdr;
1283 unsigned int symtab_section, shstrtab_section;
1284 unsigned int strtab_section, dynsymtab_section;
1285 unsigned int symtab_shndx_section;
1286 unsigned int dynversym_section, dynverdef_section, dynverref_section;
1287 file_ptr next_file_pos;
1288 bfd_vma gp; /* The gp value */
1289 unsigned int gp_size; /* The gp size */
1291 /* Information grabbed from an elf core file. */
1298 /* A mapping from external symbols to entries in the linker hash
1299 table, used when linking. This is indexed by the symbol index
1300 minus the sh_info field of the symbol table header. */
1301 struct elf_link_hash_entry **sym_hashes;
1303 /* Track usage and final offsets of GOT entries for local symbols.
1304 This array is indexed by symbol index. Elements are used
1305 identically to "got" in struct elf_link_hash_entry. */
1308 bfd_signed_vma *refcounts;
1310 struct got_entry **ents;
1313 /* The linker ELF emulation code needs to let the backend ELF linker
1314 know what filename should be used for a dynamic object if the
1315 dynamic object is found using a search. The emulation code then
1316 sometimes needs to know what name was actually used. Until the
1317 file has been added to the linker symbol table, this field holds
1318 the name the linker wants. After it has been added, it holds the
1319 name actually used, which will be the DT_SONAME entry if there is
1321 const char *dt_name;
1323 /* Records the result of `get_program_header_size'. */
1324 bfd_size_type program_header_size;
1326 /* Used by find_nearest_line entry point. */
1329 /* Used by MIPS ELF find_nearest_line entry point. The structure
1330 could be included directly in this one, but there's no point to
1331 wasting the memory just for the infrequently called
1332 find_nearest_line. */
1333 struct mips_elf_find_line *find_line_info;
1335 /* A place to stash dwarf1 info for this bfd. */
1336 struct dwarf1_debug *dwarf1_find_line_info;
1338 /* A place to stash dwarf2 info for this bfd. */
1339 void *dwarf2_find_line_info;
1341 /* An array of stub sections indexed by symbol number, used by the
1342 MIPS ELF linker. FIXME: We should figure out some way to only
1343 include this field for a MIPS ELF target. */
1344 asection **local_stubs;
1346 /* Used to determine if PT_GNU_EH_FRAME segment header should be
1348 asection *eh_frame_hdr;
1350 Elf_Internal_Shdr **group_sect_ptr;
1353 /* Number of symbol version definitions we are about to emit. */
1354 unsigned int cverdefs;
1356 /* Number of symbol version references we are about to emit. */
1357 unsigned int cverrefs;
1359 /* Segment flags for the PT_GNU_STACK segment. */
1360 unsigned int stack_flags;
1362 /* Should the PT_GNU_RELRO segment be emitted? */
1365 /* Symbol version definitions in external objects. */
1366 Elf_Internal_Verdef *verdef;
1368 /* Symbol version references to external objects. */
1369 Elf_Internal_Verneed *verref;
1371 /* The Irix 5 support uses two virtual sections, which represent
1372 text/data symbols defined in dynamic objects. */
1373 asymbol *elf_data_symbol;
1374 asymbol *elf_text_symbol;
1375 asection *elf_data_section;
1376 asection *elf_text_section;
1378 /* Whether a dyanmic object was specified normally on the linker
1379 command line, or was specified when --as-needed was in effect,
1380 or was found via a DT_NEEDED entry. */
1381 enum dynamic_lib_link_class dyn_lib_class;
1383 /* This is set to TRUE if the object was created by the backend
1387 /* Irix 5 often screws up the symbol table, sorting local symbols
1388 after global symbols. This flag is set if the symbol table in
1389 this BFD appears to be screwed up. If it is, we ignore the
1390 sh_info field in the symbol table header, and always read all the
1392 bfd_boolean bad_symtab;
1394 /* Used to determine if the e_flags field has been initialized */
1395 bfd_boolean flags_init;
1398 #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
1399 #define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header)
1400 #define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr)
1401 #define elf_numsections(bfd) (elf_tdata(bfd) -> num_elf_sections)
1402 #define elf_shstrtab(bfd) (elf_tdata(bfd) -> strtab_ptr)
1403 #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section)
1404 #define elf_symtab_shndx(bfd) (elf_tdata(bfd) -> symtab_shndx_section)
1405 #define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section)
1406 #define elf_dynversym(bfd) (elf_tdata(bfd) -> dynversym_section)
1407 #define elf_dynverdef(bfd) (elf_tdata(bfd) -> dynverdef_section)
1408 #define elf_dynverref(bfd) (elf_tdata(bfd) -> dynverref_section)
1409 #define elf_num_locals(bfd) (elf_tdata(bfd) -> num_locals)
1410 #define elf_num_globals(bfd) (elf_tdata(bfd) -> num_globals)
1411 #define elf_section_syms(bfd) (elf_tdata(bfd) -> section_syms)
1412 #define elf_num_section_syms(bfd) (elf_tdata(bfd) -> num_section_syms)
1413 #define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
1414 #define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
1415 #define elf_gp(bfd) (elf_tdata(bfd) -> gp)
1416 #define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size)
1417 #define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes)
1418 #define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts)
1419 #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets)
1420 #define elf_local_got_ents(bfd) (elf_tdata(bfd) -> local_got.ents)
1421 #define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name)
1422 #define elf_dyn_lib_class(bfd) (elf_tdata(bfd) -> dyn_lib_class)
1423 #define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab)
1424 #define elf_flags_init(bfd) (elf_tdata(bfd) -> flags_init)
1426 extern void _bfd_elf_swap_verdef_in
1427 (bfd *, const Elf_External_Verdef *, Elf_Internal_Verdef *);
1428 extern void _bfd_elf_swap_verdef_out
1429 (bfd *, const Elf_Internal_Verdef *, Elf_External_Verdef *);
1430 extern void _bfd_elf_swap_verdaux_in
1431 (bfd *, const Elf_External_Verdaux *, Elf_Internal_Verdaux *);
1432 extern void _bfd_elf_swap_verdaux_out
1433 (bfd *, const Elf_Internal_Verdaux *, Elf_External_Verdaux *);
1434 extern void _bfd_elf_swap_verneed_in
1435 (bfd *, const Elf_External_Verneed *, Elf_Internal_Verneed *);
1436 extern void _bfd_elf_swap_verneed_out
1437 (bfd *, const Elf_Internal_Verneed *, Elf_External_Verneed *);
1438 extern void _bfd_elf_swap_vernaux_in
1439 (bfd *, const Elf_External_Vernaux *, Elf_Internal_Vernaux *);
1440 extern void _bfd_elf_swap_vernaux_out
1441 (bfd *, const Elf_Internal_Vernaux *, Elf_External_Vernaux *);
1442 extern void _bfd_elf_swap_versym_in
1443 (bfd *, const Elf_External_Versym *, Elf_Internal_Versym *);
1444 extern void _bfd_elf_swap_versym_out
1445 (bfd *, const Elf_Internal_Versym *, Elf_External_Versym *);
1447 extern int _bfd_elf_section_from_bfd_section
1448 (bfd *, asection *);
1449 extern char *bfd_elf_string_from_elf_section
1450 (bfd *, unsigned, unsigned);
1451 extern char *bfd_elf_get_str_section
1453 extern Elf_Internal_Sym *bfd_elf_get_elf_syms
1454 (bfd *, Elf_Internal_Shdr *, size_t, size_t, Elf_Internal_Sym *, void *,
1455 Elf_External_Sym_Shndx *);
1456 extern const char *bfd_elf_sym_name
1457 (bfd *, Elf_Internal_Shdr *, Elf_Internal_Sym *, asection *);
1459 extern bfd_boolean _bfd_elf_copy_private_bfd_data
1461 extern bfd_boolean _bfd_elf_print_private_bfd_data
1463 extern void bfd_elf_print_symbol
1464 (bfd *, void *, asymbol *, bfd_print_symbol_type);
1466 extern void _bfd_elf_sprintf_vma
1467 (bfd *, char *, bfd_vma);
1468 extern void _bfd_elf_fprintf_vma
1469 (bfd *, void *, bfd_vma);
1471 extern unsigned int _bfd_elf_eh_frame_address_size
1472 (bfd *, asection *);
1473 extern bfd_byte _bfd_elf_encode_eh_address
1474 (bfd *abfd, struct bfd_link_info *info, asection *osec, bfd_vma offset,
1475 asection *loc_sec, bfd_vma loc_offset, bfd_vma *encoded);
1476 extern bfd_boolean _bfd_elf_can_make_relative
1477 (bfd *input_bfd, struct bfd_link_info *info, asection *eh_frame_section);
1479 extern enum elf_reloc_type_class _bfd_elf_reloc_type_class
1480 (const Elf_Internal_Rela *);
1481 extern bfd_vma _bfd_elf_rela_local_sym
1482 (bfd *, Elf_Internal_Sym *, asection **, Elf_Internal_Rela *);
1483 extern bfd_vma _bfd_elf_rel_local_sym
1484 (bfd *, Elf_Internal_Sym *, asection **, bfd_vma);
1485 extern bfd_vma _bfd_elf_section_offset
1486 (bfd *, struct bfd_link_info *, asection *, bfd_vma);
1488 extern unsigned long bfd_elf_hash
1490 extern unsigned long bfd_elf_gnu_hash
1493 extern bfd_reloc_status_type bfd_elf_generic_reloc
1494 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
1495 extern bfd_boolean bfd_elf_mkobject
1497 extern bfd_boolean bfd_elf_mkcorefile
1499 extern Elf_Internal_Shdr *bfd_elf_find_section
1501 extern bfd_boolean _bfd_elf_make_section_from_shdr
1502 (bfd *, Elf_Internal_Shdr *, const char *, int);
1503 extern bfd_boolean _bfd_elf_make_section_from_phdr
1504 (bfd *, Elf_Internal_Phdr *, int, const char *);
1505 extern struct bfd_hash_entry *_bfd_elf_link_hash_newfunc
1506 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
1507 extern struct bfd_link_hash_table *_bfd_elf_link_hash_table_create
1509 extern void _bfd_elf_link_hash_copy_indirect
1510 (struct bfd_link_info *, struct elf_link_hash_entry *,
1511 struct elf_link_hash_entry *);
1512 extern void _bfd_elf_link_hash_hide_symbol
1513 (struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean);
1514 extern bfd_boolean _bfd_elf_link_hash_fixup_symbol
1515 (struct bfd_link_info *, struct elf_link_hash_entry *);
1516 extern bfd_boolean _bfd_elf_link_hash_table_init
1517 (struct elf_link_hash_table *, bfd *,
1518 struct bfd_hash_entry *(*)
1519 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *),
1521 extern bfd_boolean _bfd_elf_slurp_version_tables
1522 (bfd *, bfd_boolean);
1523 extern bfd_boolean _bfd_elf_merge_sections
1524 (bfd *, struct bfd_link_info *);
1525 extern bfd_boolean _bfd_elf_match_sections_by_type
1526 (bfd *, const asection *, bfd *, const asection *);
1527 extern bfd_boolean bfd_elf_is_group_section
1528 (bfd *, const struct bfd_section *);
1529 extern void _bfd_elf_section_already_linked
1530 (bfd *, struct bfd_section *);
1531 extern void bfd_elf_set_group_contents
1532 (bfd *, asection *, void *);
1533 extern asection *_bfd_elf_check_kept_section
1535 extern void _bfd_elf_link_just_syms
1536 (asection *, struct bfd_link_info *);
1537 extern bfd_boolean _bfd_elf_copy_private_header_data
1539 extern bfd_boolean _bfd_elf_copy_private_symbol_data
1540 (bfd *, asymbol *, bfd *, asymbol *);
1541 #define _bfd_generic_init_private_section_data \
1542 _bfd_elf_init_private_section_data
1543 extern bfd_boolean _bfd_elf_init_private_section_data
1544 (bfd *, asection *, bfd *, asection *, struct bfd_link_info *);
1545 extern bfd_boolean _bfd_elf_copy_private_section_data
1546 (bfd *, asection *, bfd *, asection *);
1547 extern bfd_boolean _bfd_elf_write_object_contents
1549 extern bfd_boolean _bfd_elf_write_corefile_contents
1551 extern bfd_boolean _bfd_elf_set_section_contents
1552 (bfd *, sec_ptr, const void *, file_ptr, bfd_size_type);
1553 extern long _bfd_elf_get_symtab_upper_bound
1555 extern long _bfd_elf_canonicalize_symtab
1556 (bfd *, asymbol **);
1557 extern long _bfd_elf_get_dynamic_symtab_upper_bound
1559 extern long _bfd_elf_canonicalize_dynamic_symtab
1560 (bfd *, asymbol **);
1561 extern long _bfd_elf_get_synthetic_symtab
1562 (bfd *, long, asymbol **, long, asymbol **, asymbol **);
1563 extern long _bfd_elf_get_reloc_upper_bound
1565 extern long _bfd_elf_canonicalize_reloc
1566 (bfd *, sec_ptr, arelent **, asymbol **);
1567 extern long _bfd_elf_get_dynamic_reloc_upper_bound
1569 extern long _bfd_elf_canonicalize_dynamic_reloc
1570 (bfd *, arelent **, asymbol **);
1571 extern asymbol *_bfd_elf_make_empty_symbol
1573 extern void _bfd_elf_get_symbol_info
1574 (bfd *, asymbol *, symbol_info *);
1575 extern bfd_boolean _bfd_elf_is_local_label_name
1576 (bfd *, const char *);
1577 extern alent *_bfd_elf_get_lineno
1579 extern bfd_boolean _bfd_elf_set_arch_mach
1580 (bfd *, enum bfd_architecture, unsigned long);
1581 extern bfd_boolean _bfd_elf_find_nearest_line
1582 (bfd *, asection *, asymbol **, bfd_vma, const char **, const char **,
1584 extern bfd_boolean _bfd_elf_find_line
1585 (bfd *, asymbol **, asymbol *, const char **, unsigned int *);
1586 #define _bfd_generic_find_line _bfd_elf_find_line
1587 extern bfd_boolean _bfd_elf_find_inliner_info
1588 (bfd *, const char **, const char **, unsigned int *);
1589 #define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols
1590 #define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
1591 extern int _bfd_elf_sizeof_headers
1592 (bfd *, struct bfd_link_info *);
1593 extern bfd_boolean _bfd_elf_new_section_hook
1594 (bfd *, asection *);
1595 extern bfd_boolean _bfd_elf_init_reloc_shdr
1596 (bfd *, Elf_Internal_Shdr *, asection *, bfd_boolean);
1597 extern const struct bfd_elf_special_section *_bfd_elf_get_special_section
1598 (const char *, const struct bfd_elf_special_section *, unsigned int);
1599 extern const struct bfd_elf_special_section *_bfd_elf_get_sec_type_attr
1600 (bfd *, asection *);
1602 /* If the target doesn't have reloc handling written yet: */
1603 extern void _bfd_elf_no_info_to_howto
1604 (bfd *, arelent *, Elf_Internal_Rela *);
1606 extern bfd_boolean bfd_section_from_shdr
1607 (bfd *, unsigned int shindex);
1608 extern bfd_boolean bfd_section_from_phdr
1609 (bfd *, Elf_Internal_Phdr *, int);
1611 extern int _bfd_elf_symbol_from_bfd_symbol
1612 (bfd *, asymbol **);
1614 extern asection *bfd_section_from_r_symndx
1615 (bfd *, struct sym_sec_cache *, asection *, unsigned long);
1616 extern asection *bfd_section_from_elf_index
1617 (bfd *, unsigned int);
1618 extern struct bfd_strtab_hash *_bfd_elf_stringtab_init
1621 extern struct elf_strtab_hash * _bfd_elf_strtab_init
1623 extern void _bfd_elf_strtab_free
1624 (struct elf_strtab_hash *);
1625 extern bfd_size_type _bfd_elf_strtab_add
1626 (struct elf_strtab_hash *, const char *, bfd_boolean);
1627 extern void _bfd_elf_strtab_addref
1628 (struct elf_strtab_hash *, bfd_size_type);
1629 extern void _bfd_elf_strtab_delref
1630 (struct elf_strtab_hash *, bfd_size_type);
1631 extern void _bfd_elf_strtab_clear_all_refs
1632 (struct elf_strtab_hash *);
1633 extern bfd_size_type _bfd_elf_strtab_size
1634 (struct elf_strtab_hash *);
1635 extern bfd_size_type _bfd_elf_strtab_offset
1636 (struct elf_strtab_hash *, bfd_size_type);
1637 extern bfd_boolean _bfd_elf_strtab_emit
1638 (bfd *, struct elf_strtab_hash *);
1639 extern void _bfd_elf_strtab_finalize
1640 (struct elf_strtab_hash *);
1642 extern bfd_boolean _bfd_elf_discard_section_eh_frame
1643 (bfd *, struct bfd_link_info *, asection *,
1644 bfd_boolean (*) (bfd_vma, void *), struct elf_reloc_cookie *);
1645 extern bfd_boolean _bfd_elf_discard_section_eh_frame_hdr
1646 (bfd *, struct bfd_link_info *);
1647 extern bfd_vma _bfd_elf_eh_frame_section_offset
1648 (bfd *, struct bfd_link_info *, asection *, bfd_vma);
1649 extern bfd_boolean _bfd_elf_write_section_eh_frame
1650 (bfd *, struct bfd_link_info *, asection *, bfd_byte *);
1651 extern bfd_boolean _bfd_elf_write_section_eh_frame_hdr
1652 (bfd *, struct bfd_link_info *);
1653 extern bfd_boolean _bfd_elf_maybe_strip_eh_frame_hdr
1654 (struct bfd_link_info *);
1656 extern bfd_boolean _bfd_elf_merge_symbol
1657 (bfd *, struct bfd_link_info *, const char *, Elf_Internal_Sym *,
1658 asection **, bfd_vma *, unsigned int *,
1659 struct elf_link_hash_entry **, bfd_boolean *,
1660 bfd_boolean *, bfd_boolean *, bfd_boolean *);
1662 extern bfd_boolean _bfd_elf_hash_symbol (struct elf_link_hash_entry *);
1664 extern bfd_boolean _bfd_elf_add_default_symbol
1665 (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
1666 const char *, Elf_Internal_Sym *, asection **, bfd_vma *,
1667 bfd_boolean *, bfd_boolean);
1669 extern bfd_boolean _bfd_elf_export_symbol
1670 (struct elf_link_hash_entry *, void *);
1672 extern bfd_boolean _bfd_elf_link_find_version_dependencies
1673 (struct elf_link_hash_entry *, void *);
1675 extern bfd_boolean _bfd_elf_link_assign_sym_version
1676 (struct elf_link_hash_entry *, void *);
1678 extern long _bfd_elf_link_lookup_local_dynindx
1679 (struct bfd_link_info *, bfd *, long);
1680 extern bfd_boolean _bfd_elf_compute_section_file_positions
1681 (bfd *, struct bfd_link_info *);
1682 extern void _bfd_elf_assign_file_positions_for_relocs
1684 extern file_ptr _bfd_elf_assign_file_position_for_section
1685 (Elf_Internal_Shdr *, file_ptr, bfd_boolean);
1687 extern bfd_boolean _bfd_elf_validate_reloc
1690 extern bfd_boolean _bfd_elf_link_create_dynamic_sections
1691 (bfd *, struct bfd_link_info *);
1692 extern bfd_boolean _bfd_elf_link_omit_section_dynsym
1693 (bfd *, struct bfd_link_info *, asection *);
1694 extern bfd_boolean _bfd_elf_create_dynamic_sections
1695 (bfd *, struct bfd_link_info *);
1696 extern bfd_boolean _bfd_elf_create_got_section
1697 (bfd *, struct bfd_link_info *);
1698 extern struct elf_link_hash_entry *_bfd_elf_define_linkage_sym
1699 (bfd *, struct bfd_link_info *, asection *, const char *);
1701 extern bfd_boolean _bfd_elfcore_make_pseudosection
1702 (bfd *, char *, size_t, ufile_ptr);
1703 extern char *_bfd_elfcore_strndup
1704 (bfd *, char *, size_t);
1706 extern Elf_Internal_Rela *_bfd_elf_link_read_relocs
1707 (bfd *, asection *, void *, Elf_Internal_Rela *, bfd_boolean);
1709 extern bfd_boolean _bfd_elf_link_size_reloc_section
1710 (bfd *, Elf_Internal_Shdr *, asection *);
1712 extern bfd_boolean _bfd_elf_link_output_relocs
1713 (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *,
1714 struct elf_link_hash_entry **);
1716 extern bfd_boolean _bfd_elf_fix_symbol_flags
1717 (struct elf_link_hash_entry *, struct elf_info_failed *);
1719 extern bfd_boolean _bfd_elf_adjust_dynamic_symbol
1720 (struct elf_link_hash_entry *, void *);
1722 extern bfd_boolean _bfd_elf_link_sec_merge_syms
1723 (struct elf_link_hash_entry *, void *);
1725 extern bfd_boolean _bfd_elf_dynamic_symbol_p
1726 (struct elf_link_hash_entry *, struct bfd_link_info *, bfd_boolean);
1728 extern bfd_boolean _bfd_elf_symbol_refs_local_p
1729 (struct elf_link_hash_entry *, struct bfd_link_info *, bfd_boolean);
1731 extern bfd_boolean bfd_elf_match_symbols_in_sections
1732 (asection *sec1, asection *sec2);
1734 extern bfd_boolean _bfd_elf_setup_sections
1737 extern const bfd_target *bfd_elf32_object_p
1739 extern const bfd_target *bfd_elf32_core_file_p
1741 extern char *bfd_elf32_core_file_failing_command
1743 extern int bfd_elf32_core_file_failing_signal
1745 extern bfd_boolean bfd_elf32_core_file_matches_executable_p
1748 extern bfd_boolean bfd_elf32_swap_symbol_in
1749 (bfd *, const void *, const void *, Elf_Internal_Sym *);
1750 extern void bfd_elf32_swap_symbol_out
1751 (bfd *, const Elf_Internal_Sym *, void *, void *);
1752 extern void bfd_elf32_swap_reloc_in
1753 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
1754 extern void bfd_elf32_swap_reloc_out
1755 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
1756 extern void bfd_elf32_swap_reloca_in
1757 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
1758 extern void bfd_elf32_swap_reloca_out
1759 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
1760 extern void bfd_elf32_swap_phdr_in
1761 (bfd *, const Elf32_External_Phdr *, Elf_Internal_Phdr *);
1762 extern void bfd_elf32_swap_phdr_out
1763 (bfd *, const Elf_Internal_Phdr *, Elf32_External_Phdr *);
1764 extern void bfd_elf32_swap_dyn_in
1765 (bfd *, const void *, Elf_Internal_Dyn *);
1766 extern void bfd_elf32_swap_dyn_out
1767 (bfd *, const Elf_Internal_Dyn *, void *);
1768 extern long bfd_elf32_slurp_symbol_table
1769 (bfd *, asymbol **, bfd_boolean);
1770 extern bfd_boolean bfd_elf32_write_shdrs_and_ehdr
1772 extern int bfd_elf32_write_out_phdrs
1773 (bfd *, const Elf_Internal_Phdr *, unsigned int);
1774 extern void bfd_elf32_write_relocs
1775 (bfd *, asection *, void *);
1776 extern bfd_boolean bfd_elf32_slurp_reloc_table
1777 (bfd *, asection *, asymbol **, bfd_boolean);
1779 extern const bfd_target *bfd_elf64_object_p
1781 extern const bfd_target *bfd_elf64_core_file_p
1783 extern char *bfd_elf64_core_file_failing_command
1785 extern int bfd_elf64_core_file_failing_signal
1787 extern bfd_boolean bfd_elf64_core_file_matches_executable_p
1790 extern bfd_boolean bfd_elf64_swap_symbol_in
1791 (bfd *, const void *, const void *, Elf_Internal_Sym *);
1792 extern void bfd_elf64_swap_symbol_out
1793 (bfd *, const Elf_Internal_Sym *, void *, void *);
1794 extern void bfd_elf64_swap_reloc_in
1795 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
1796 extern void bfd_elf64_swap_reloc_out
1797 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
1798 extern void bfd_elf64_swap_reloca_in
1799 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
1800 extern void bfd_elf64_swap_reloca_out
1801 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
1802 extern void bfd_elf64_swap_phdr_in
1803 (bfd *, const Elf64_External_Phdr *, Elf_Internal_Phdr *);
1804 extern void bfd_elf64_swap_phdr_out
1805 (bfd *, const Elf_Internal_Phdr *, Elf64_External_Phdr *);
1806 extern void bfd_elf64_swap_dyn_in
1807 (bfd *, const void *, Elf_Internal_Dyn *);
1808 extern void bfd_elf64_swap_dyn_out
1809 (bfd *, const Elf_Internal_Dyn *, void *);
1810 extern long bfd_elf64_slurp_symbol_table
1811 (bfd *, asymbol **, bfd_boolean);
1812 extern bfd_boolean bfd_elf64_write_shdrs_and_ehdr
1814 extern int bfd_elf64_write_out_phdrs
1815 (bfd *, const Elf_Internal_Phdr *, unsigned int);
1816 extern void bfd_elf64_write_relocs
1817 (bfd *, asection *, void *);
1818 extern bfd_boolean bfd_elf64_slurp_reloc_table
1819 (bfd *, asection *, asymbol **, bfd_boolean);
1821 extern struct elf_link_hash_entry *_bfd_elf_archive_symbol_lookup
1822 (bfd *, struct bfd_link_info *, const char *);
1823 extern bfd_boolean bfd_elf_link_add_symbols
1824 (bfd *, struct bfd_link_info *);
1825 extern bfd_boolean _bfd_elf_add_dynamic_entry
1826 (struct bfd_link_info *, bfd_vma, bfd_vma);
1828 extern bfd_boolean bfd_elf_link_record_dynamic_symbol
1829 (struct bfd_link_info *, struct elf_link_hash_entry *);
1831 extern int bfd_elf_link_record_local_dynamic_symbol
1832 (struct bfd_link_info *, bfd *, long);
1834 extern void bfd_elf_link_mark_dynamic_symbol
1835 (struct bfd_link_info *, struct elf_link_hash_entry *);
1837 extern bfd_boolean _bfd_elf_close_and_cleanup
1840 extern bfd_boolean _bfd_elf_common_definition
1841 (Elf_Internal_Sym *);
1843 extern unsigned int _bfd_elf_common_section_index
1846 extern asection *_bfd_elf_common_section
1849 extern void _bfd_dwarf2_cleanup_debug_info
1852 extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn
1853 (bfd *, arelent *, struct bfd_symbol *, void *,
1854 asection *, bfd *, char **);
1856 extern bfd_boolean bfd_elf_final_link
1857 (bfd *, struct bfd_link_info *);
1859 extern bfd_boolean bfd_elf_gc_mark_dynamic_ref_symbol
1860 (struct elf_link_hash_entry *h, void *inf);
1862 extern bfd_boolean bfd_elf_gc_sections
1863 (bfd *, struct bfd_link_info *);
1865 extern bfd_boolean bfd_elf_gc_record_vtinherit
1866 (bfd *, asection *, struct elf_link_hash_entry *, bfd_vma);
1868 extern bfd_boolean bfd_elf_gc_record_vtentry
1869 (bfd *, asection *, struct elf_link_hash_entry *, bfd_vma);
1871 extern asection *_bfd_elf_gc_mark_hook
1872 (asection *, struct bfd_link_info *, Elf_Internal_Rela *,
1873 struct elf_link_hash_entry *, Elf_Internal_Sym *);
1875 extern bfd_boolean _bfd_elf_gc_mark
1876 (struct bfd_link_info *, asection *,
1877 asection * (*) (asection *, struct bfd_link_info *, Elf_Internal_Rela *,
1878 struct elf_link_hash_entry *, Elf_Internal_Sym *));
1880 extern bfd_boolean bfd_elf_gc_common_finalize_got_offsets
1881 (bfd *, struct bfd_link_info *);
1883 extern bfd_boolean bfd_elf_gc_common_final_link
1884 (bfd *, struct bfd_link_info *);
1886 extern bfd_boolean bfd_elf_reloc_symbol_deleted_p
1889 extern struct elf_segment_map * _bfd_elf_make_dynamic_segment
1890 (bfd *, asection *);
1892 extern bfd_boolean _bfd_elf_map_sections_to_segments
1893 (bfd *, struct bfd_link_info *);
1895 /* Exported interface for writing elf corefile notes. */
1896 extern char *elfcore_write_note
1897 (bfd *, char *, int *, const char *, int, const void *, int);
1898 extern char *elfcore_write_prpsinfo
1899 (bfd *, char *, int *, const char *, const char *);
1900 extern char *elfcore_write_prstatus
1901 (bfd *, char *, int *, long, int, const void *);
1902 extern char * elfcore_write_pstatus
1903 (bfd *, char *, int *, long, int, const void *);
1904 extern char *elfcore_write_prfpreg
1905 (bfd *, char *, int *, const void *, int);
1906 extern char *elfcore_write_prxfpreg
1907 (bfd *, char *, int *, const void *, int);
1908 extern char *elfcore_write_lwpstatus
1909 (bfd *, char *, int *, long, int, const void *);
1911 extern bfd *_bfd_elf32_bfd_from_remote_memory
1912 (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep,
1913 int (*target_read_memory) (bfd_vma, bfd_byte *, int));
1914 extern bfd *_bfd_elf64_bfd_from_remote_memory
1915 (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep,
1916 int (*target_read_memory) (bfd_vma, bfd_byte *, int));
1918 /* Large common section. */
1919 extern asection _bfd_elf_large_com_section;
1921 /* SH ELF specific routine. */
1923 extern bfd_boolean _sh_elf_set_mach_from_flags
1926 /* This is the condition under which finish_dynamic_symbol will be called.
1927 If our finish_dynamic_symbol isn't called, we'll need to do something
1928 about initializing any .plt and .got entries in relocate_section. */
1929 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
1931 && ((SHARED) || !(H)->forced_local) \
1932 && ((H)->dynindx != -1 || (H)->forced_local))
1934 /* This macro is to avoid lots of duplicated code in the body
1935 of xxx_relocate_section() in the various elfxx-xxxx.c files. */
1936 #define RELOC_FOR_GLOBAL_SYMBOL(info, input_bfd, input_section, rel, \
1937 r_symndx, symtab_hdr, sym_hashes, \
1938 h, sec, relocation, \
1939 unresolved_reloc, warned) \
1942 /* It seems this can happen with erroneous or unsupported \
1943 input (mixing a.out and elf in an archive, for example.) */ \
1944 if (sym_hashes == NULL) \
1947 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; \
1949 while (h->root.type == bfd_link_hash_indirect \
1950 || h->root.type == bfd_link_hash_warning) \
1951 h = (struct elf_link_hash_entry *) h->root.u.i.link; \
1954 unresolved_reloc = FALSE; \
1956 if (h->root.type == bfd_link_hash_defined \
1957 || h->root.type == bfd_link_hash_defweak) \
1959 sec = h->root.u.def.section; \
1961 || sec->output_section == NULL) \
1962 /* Set a flag that will be cleared later if we find a \
1963 relocation value for this symbol. output_section \
1964 is typically NULL for symbols satisfied by a shared \
1966 unresolved_reloc = TRUE; \
1968 relocation = (h->root.u.def.value \
1969 + sec->output_section->vma \
1970 + sec->output_offset); \
1972 else if (h->root.type == bfd_link_hash_undefweak) \
1974 else if (info->unresolved_syms_in_objects == RM_IGNORE \
1975 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) \
1980 err = (info->unresolved_syms_in_objects == RM_GENERATE_ERROR \
1981 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT); \
1982 if (!info->callbacks->undefined_symbol (info, \
1983 h->root.root.string, \
1986 rel->r_offset, err)) \
1993 /* Will a symbol be bound to the the definition within the shared
1995 #define SYMBOLIC_BIND(INFO, H) \
1996 ((INFO)->symbolic || ((INFO)->dynamic && !(H)->dynamic))
1998 #endif /* _LIBELF_H_ */