1 /* BFD back-end data structures for ELF files.
2 Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
3 2002 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. */
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. */
36 /* Do not "beautify" the CONCAT* macro args. Traditional C will not
37 remove whitespace added here, and thus will fail to concatenate
41 #define NAME(x,y) CONCAT4 (x,64,_,y)
44 #define NAME(x,y) CONCAT4 (x,32,_,y)
49 #define NAME(x,y) CONCAT4 (x,NOSIZE,_,y)
52 #define ElfNAME(X) NAME(Elf,X)
53 #define elfNAME(X) NAME(elf,X)
55 /* Information held for an ELF symbol. The first field is the
56 corresponding asymbol. Every symbol is an ELF file is actually a
57 pointer to this structure, although it is often handled as a
58 pointer to an asymbol. */
64 /* ELF symbol information. */
65 Elf_Internal_Sym internal_elf_sym;
66 /* Backend specific information. */
69 unsigned int hppa_arg_reloc;
75 /* Version information. This is from an Elf_Internal_Versym
76 structure in a SHT_GNU_versym section. It is zero if there is no
77 version information. */
78 unsigned short version;
82 struct elf_strtab_hash;
84 /* ELF linker hash table entries. */
86 struct elf_link_hash_entry
88 struct bfd_link_hash_entry root;
90 /* Symbol index in output file. This is initialized to -1. It is
91 set to -2 if the symbol is used by a reloc. */
94 /* Symbol index as a dynamic symbol. Initialized to -1, and remains
95 -1 if this is not a dynamic symbol. */
96 /* ??? Note that this is consistently used as a synonym for tests
97 against whether we can perform various simplifying transformations
98 to the code. (E.g. changing a pc-relative jump to a PLT entry
99 into a pc-relative jump to the target function.) That test, which
100 is often relatively complex, and someplaces wrong or incomplete,
101 should really be replaced by a predicate in elflink.c.
103 End result: this field -1 does not indicate that the symbol is
104 not in the dynamic symbol table, but rather that the symbol is
105 not visible outside this DSO. */
108 /* String table index in .dynstr if this is a dynamic symbol. */
109 unsigned long dynstr_index;
111 /* Hash value of the name computed using the ELF hash function. */
112 unsigned long elf_hash_value;
114 /* If this is a weak defined symbol from a dynamic object, this
115 field points to a defined symbol with the same value, if there is
116 one. Otherwise it is NULL. */
117 struct elf_link_hash_entry *weakdef;
119 /* If this symbol is used in the linker created sections, the processor
120 specific backend uses this field to map the field into the offset
121 from the beginning of the section. */
122 struct elf_linker_section_pointers *linker_section_pointer;
124 /* Version information. */
127 /* This field is used for a symbol which is not defined in a
128 regular object. It points to the version information read in
129 from the dynamic object. */
130 Elf_Internal_Verdef *verdef;
131 /* This field is used for a symbol which is defined in a regular
132 object. It is set up in size_dynamic_sections. It points to
133 the version information we should write out for this symbol. */
134 struct bfd_elf_version_tree *vertree;
137 /* Virtual table entry use information. This array is nominally of size
138 size/sizeof(target_void_pointer), though we have to be able to assume
139 and track a size while the symbol is still undefined. It is indexed
140 via offset/sizeof(target_void_pointer). */
141 size_t vtable_entries_size;
142 boolean *vtable_entries_used;
144 /* Virtual table derivation info. */
145 struct elf_link_hash_entry *vtable_parent;
147 /* If this symbol requires an entry in the global offset table, the
148 processor specific backend uses this field to track usage and
149 final offset. We use a union and two names primarily to document
150 the intent of any particular piece of code. The field should be
151 used as a count until size_dynamic_sections, at which point the
152 contents of the .got is fixed. Afterward, if this field is -1,
153 then the symbol does not require a global offset table entry. */
156 bfd_signed_vma refcount;
160 /* Same, but tracks a procedure linkage table entry. */
163 bfd_signed_vma refcount;
170 /* Symbol type (STT_NOTYPE, STT_OBJECT, etc.). */
173 /* Symbol st_other value, symbol visibility. */
176 /* Some flags; legal values follow. */
177 unsigned short elf_link_hash_flags;
178 /* Symbol is referenced by a non-shared object. */
179 #define ELF_LINK_HASH_REF_REGULAR 01
180 /* Symbol is defined by a non-shared object. */
181 #define ELF_LINK_HASH_DEF_REGULAR 02
182 /* Symbol is referenced by a shared object. */
183 #define ELF_LINK_HASH_REF_DYNAMIC 04
184 /* Symbol is defined by a shared object. */
185 #define ELF_LINK_HASH_DEF_DYNAMIC 010
186 /* Symbol has a non-weak reference from a non-shared object. */
187 #define ELF_LINK_HASH_REF_REGULAR_NONWEAK 020
188 /* Dynamic symbol has been adjustd. */
189 #define ELF_LINK_HASH_DYNAMIC_ADJUSTED 040
190 /* Symbol needs a copy reloc. */
191 #define ELF_LINK_HASH_NEEDS_COPY 0100
192 /* Symbol needs a procedure linkage table entry. */
193 #define ELF_LINK_HASH_NEEDS_PLT 0200
194 /* Symbol appears in a non-ELF input file. */
195 #define ELF_LINK_NON_ELF 0400
196 /* Symbol should be marked as hidden in the version information. */
197 #define ELF_LINK_HIDDEN 01000
198 /* Symbol was forced to local scope due to a version script file. */
199 #define ELF_LINK_FORCED_LOCAL 02000
200 /* Symbol was marked during garbage collection. */
201 #define ELF_LINK_HASH_MARK 04000
202 /* Symbol is referenced by a non-GOT/non-PLT relocation. This is
203 not currently set by all the backends. */
204 #define ELF_LINK_NON_GOT_REF 010000
207 /* Records local symbols to be emitted in the dynamic symbol table. */
209 struct elf_link_local_dynamic_entry
211 struct elf_link_local_dynamic_entry *next;
213 /* The input bfd this symbol came from. */
216 /* The index of the local symbol being copied. */
219 /* The index in the outgoing dynamic symbol table. */
222 /* A copy of the input symbol. */
223 Elf_Internal_Sym isym;
226 enum elf_link_info_type
231 ELF_INFO_TYPE_EH_FRAME,
232 ELF_INFO_TYPE_EH_FRAME_HDR,
233 ELF_INFO_TYPE_JUST_SYMS,
237 /* Cached start, size and alignment of PT_TLS segment. */
238 struct elf_link_tls_segment
245 /* ELF linker hash table. */
247 struct elf_link_hash_table
249 struct bfd_link_hash_table root;
251 /* Whether we have created the special dynamic sections required
252 when linking against or generating a shared object. */
253 boolean dynamic_sections_created;
255 /* The BFD used to hold special sections created by the linker.
256 This will be the first BFD found which requires these sections to
260 /* The value to use when initialising got.refcount/offset and
261 plt.refcount/offset in an elf_link_hash_entry. Set to zero when
262 the values are refcounts. Set to -1 in size_dynamic_sections
263 when the values may be offsets. */
264 bfd_signed_vma init_refcount;
266 /* The number of symbols found in the link which must be put into
267 the .dynsym section. */
268 bfd_size_type dynsymcount;
270 /* The string table of dynamic symbols, which becomes the .dynstr
272 struct elf_strtab_hash *dynstr;
274 /* The number of buckets in the hash table in the .hash section.
275 This is based on the number of dynamic symbols. */
276 bfd_size_type bucketcount;
278 /* A linked list of DT_NEEDED names found in dynamic objects
279 included in the link. */
280 struct bfd_link_needed_list *needed;
282 /* The _GLOBAL_OFFSET_TABLE_ symbol. */
283 struct elf_link_hash_entry *hgot;
285 /* A pointer to information used to link stabs in sections. */
288 /* A pointer to information used to merge SEC_MERGE sections. */
291 /* A linked list of local symbols to be added to .dynsym. */
292 struct elf_link_local_dynamic_entry *dynlocal;
294 /* A linked list of DT_RPATH/DT_RUNPATH names found in dynamic
295 objects included in the link. */
296 struct bfd_link_needed_list *runpath;
298 /* Cached start, size and alignment of PT_TLS segment. */
299 struct elf_link_tls_segment *tls_segment;
302 /* Look up an entry in an ELF linker hash table. */
304 #define elf_link_hash_lookup(table, string, create, copy, follow) \
305 ((struct elf_link_hash_entry *) \
306 bfd_link_hash_lookup (&(table)->root, (string), (create), \
309 /* Traverse an ELF linker hash table. */
311 #define elf_link_hash_traverse(table, func, info) \
312 (bfd_link_hash_traverse \
314 (boolean (*) PARAMS ((struct bfd_link_hash_entry *, PTR))) (func), \
317 /* Get the ELF linker hash table from a link_info structure. */
319 #define elf_hash_table(p) ((struct elf_link_hash_table *) ((p)->hash))
321 /* Returns true if the hash table is a struct elf_link_hash_table. */
322 #define is_elf_hash_table(p) \
323 ((p)->hash->type == bfd_link_elf_hash_table)
325 /* Used by bfd_section_from_r_symndx to cache a small number of local
326 symbol to section mappings. */
327 #define LOCAL_SYM_CACHE_SIZE 32
331 unsigned long indx[LOCAL_SYM_CACHE_SIZE];
332 asection *sec[LOCAL_SYM_CACHE_SIZE];
335 /* Constant information held for an ELF backend. */
337 struct elf_size_info {
338 unsigned char sizeof_ehdr, sizeof_phdr, sizeof_shdr;
339 unsigned char sizeof_rel, sizeof_rela, sizeof_sym, sizeof_dyn, sizeof_note;
341 /* The size of entries in the .hash section. */
342 unsigned char sizeof_hash_entry;
344 /* The number of internal relocations to allocate per external
346 unsigned char int_rels_per_ext_rel;
348 unsigned char arch_size, file_align;
349 unsigned char elfclass, ev_current;
350 int (*write_out_phdrs)
351 PARAMS ((bfd *, const Elf_Internal_Phdr *, unsigned int));
352 boolean (*write_shdrs_and_ehdr)
355 PARAMS ((bfd *, asection *, PTR));
356 void (*swap_symbol_out)
357 PARAMS ((bfd *, const Elf_Internal_Sym *, PTR, PTR));
358 boolean (*slurp_reloc_table)
359 PARAMS ((bfd *, asection *, asymbol **, boolean));
360 long (*slurp_symbol_table)
361 PARAMS ((bfd *, asymbol **, boolean));
363 PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *));
365 PARAMS ((bfd *, const Elf_Internal_Dyn *, PTR));
367 /* This function, if defined, is called to swap in a REL
368 relocation. If an external relocation corresponds to more than
369 one internal relocation, then all relocations are swapped in at
371 void (*swap_reloc_in)
372 PARAMS ((bfd *, const bfd_byte *, Elf_Internal_Rel *));
374 /* This function, if defined, is called to swap out a REL
376 void (*swap_reloc_out)
377 PARAMS ((bfd *, const Elf_Internal_Rel *, bfd_byte *));
379 /* This function, if defined, is called to swap in a RELA
380 relocation. If an external relocation corresponds to more than
381 one internal relocation, then all relocations are swapped in at
383 void (*swap_reloca_in)
384 PARAMS ((bfd *, const bfd_byte *, Elf_Internal_Rela *));
386 /* This function, if defined, is called to swap out a RELA
388 void (*swap_reloca_out)
389 PARAMS ((bfd *, const Elf_Internal_Rela *, bfd_byte *));
393 #define elf_symbol_from(ABFD,S) \
394 (((S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \
395 && (S)->the_bfd->tdata.elf_obj_data != 0) \
396 ? (elf_symbol_type *) (S) \
399 enum elf_reloc_type_class {
401 reloc_class_relative,
406 struct elf_reloc_cookie
408 Elf_Internal_Rela *rels, *rel, *relend;
414 struct elf_link_hash_entry **sym_hashes;
418 /* The level of IRIX compatibility we're striving for. */
426 struct elf_backend_data
428 /* The architecture for this backend. */
429 enum bfd_architecture arch;
431 /* The ELF machine code (EM_xxxx) for this backend. */
432 int elf_machine_code;
434 /* The maximum page size for this backend. */
437 /* A function to translate an ELF RELA relocation to a BFD arelent
439 void (*elf_info_to_howto)
440 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
442 /* A function to translate an ELF REL relocation to a BFD arelent
444 void (*elf_info_to_howto_rel)
445 PARAMS ((bfd *, arelent *, Elf_Internal_Rel *));
447 /* A function to determine whether a symbol is global when
448 partitioning the symbol table into local and global symbols.
449 This should be NULL for most targets, in which case the correct
450 thing will be done. MIPS ELF, at least on the Irix 5, has
451 special requirements. */
452 boolean (*elf_backend_sym_is_global)
453 PARAMS ((bfd *, asymbol *));
455 /* The remaining functions are hooks which are called only if they
458 /* A function to permit a backend specific check on whether a
459 particular BFD format is relevant for an object file, and to
460 permit the backend to set any global information it wishes. When
461 this is called elf_elfheader is set, but anything else should be
462 used with caution. If this returns false, the check_format
463 routine will return a bfd_error_wrong_format error. */
464 boolean (*elf_backend_object_p)
467 /* A function to do additional symbol processing when reading the
468 ELF symbol table. This is where any processor-specific special
469 section indices are handled. */
470 void (*elf_backend_symbol_processing)
471 PARAMS ((bfd *, asymbol *));
473 /* A function to do additional symbol processing after reading the
474 entire ELF symbol table. */
475 boolean (*elf_backend_symbol_table_processing)
476 PARAMS ((bfd *, elf_symbol_type *, unsigned int));
478 /* A function to set the type of the info field. Processor-specific
479 types should be handled here. */
480 int (*elf_backend_get_symbol_type)
481 PARAMS (( Elf_Internal_Sym *, int));
483 /* A function to do additional processing on the ELF section header
484 just before writing it out. This is used to set the flags and
485 type fields for some sections, or to actually write out data for
487 boolean (*elf_backend_section_processing)
488 PARAMS ((bfd *, Elf32_Internal_Shdr *));
490 /* A function to handle unusual section types when creating BFD
491 sections from ELF sections. */
492 boolean (*elf_backend_section_from_shdr)
493 PARAMS ((bfd *, Elf32_Internal_Shdr *, const char *));
495 /* A function to convert machine dependent section header flags to
496 BFD internal section header flags. */
497 boolean (*elf_backend_section_flags)
498 PARAMS ((flagword *, Elf32_Internal_Shdr *));
500 /* A function to handle unusual program segment types when creating BFD
501 sections from ELF program segments. */
502 boolean (*elf_backend_section_from_phdr)
503 PARAMS ((bfd *, Elf32_Internal_Phdr *, int));
505 /* A function to set up the ELF section header for a BFD section in
506 preparation for writing it out. This is where the flags and type
507 fields are set for unusual sections. */
508 boolean (*elf_backend_fake_sections)
509 PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *));
511 /* A function to get the ELF section index for a BFD section. If
512 this returns true, the section was found. If it is a normal ELF
513 section, *RETVAL should be left unchanged. If it is not a normal
514 ELF section *RETVAL should be set to the SHN_xxxx index. */
515 boolean (*elf_backend_section_from_bfd_section)
516 PARAMS ((bfd *, asection *, int *retval));
518 /* If this field is not NULL, it is called by the add_symbols phase
519 of a link just before adding a symbol to the global linker hash
520 table. It may modify any of the fields as it wishes. If *NAME
521 is set to NULL, the symbol will be skipped rather than being
522 added to the hash table. This function is responsible for
523 handling all processor dependent symbol bindings and section
524 indices, and must set at least *FLAGS and *SEC for each processor
525 dependent case; failure to do so will cause a link error. */
526 boolean (*elf_add_symbol_hook)
527 PARAMS ((bfd *abfd, struct bfd_link_info *info,
528 const Elf_Internal_Sym *, const char **name,
529 flagword *flags, asection **sec, bfd_vma *value));
531 /* If this field is not NULL, it is called by the elf_link_output_sym
532 phase of a link for each symbol which will appear in the object file. */
533 boolean (*elf_backend_link_output_symbol_hook)
534 PARAMS ((bfd *, struct bfd_link_info *info, const char *,
535 Elf_Internal_Sym *, asection *));
537 /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend
538 linker the first time it encounters a dynamic object in the link.
539 This function must create any sections required for dynamic
540 linking. The ABFD argument is a dynamic object. The .interp,
541 .dynamic, .dynsym, .dynstr, and .hash functions have already been
542 created, and this function may modify the section flags if
543 desired. This function will normally create the .got and .plt
544 sections, but different backends have different requirements. */
545 boolean (*elf_backend_create_dynamic_sections)
546 PARAMS ((bfd *abfd, struct bfd_link_info *info));
548 /* The CHECK_RELOCS function is called by the add_symbols phase of
549 the ELF backend linker. It is called once for each section with
550 relocs of an object file, just after the symbols for the object
551 file have been added to the global linker hash table. The
552 function must look through the relocs and do any special handling
553 required. This generally means allocating space in the global
554 offset table, and perhaps allocating space for a reloc. The
555 relocs are always passed as Rela structures; if the section
556 actually uses Rel structures, the r_addend field will always be
558 boolean (*check_relocs)
559 PARAMS ((bfd *abfd, struct bfd_link_info *info, asection *o,
560 const Elf_Internal_Rela *relocs));
562 /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
563 linker for every symbol which is defined by a dynamic object and
564 referenced by a regular object. This is called after all the
565 input files have been seen, but before the SIZE_DYNAMIC_SECTIONS
566 function has been called. The hash table entry should be
567 bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be
568 defined in a section from a dynamic object. Dynamic object
569 sections are not included in the final link, and this function is
570 responsible for changing the value to something which the rest of
571 the link can deal with. This will normally involve adding an
572 entry to the .plt or .got or some such section, and setting the
573 symbol to point to that. */
574 boolean (*elf_backend_adjust_dynamic_symbol)
575 PARAMS ((struct bfd_link_info *info, struct elf_link_hash_entry *h));
577 /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker
578 after all the linker input files have been seen but before the
579 section sizes have been set. This is called after
580 ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS. */
581 boolean (*elf_backend_always_size_sections)
582 PARAMS ((bfd *output_bfd, struct bfd_link_info *info));
584 /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend
585 linker after all the linker input files have been seen but before
586 the sections sizes have been set. This is called after
587 ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols.
588 It is only called when linking against a dynamic object. It must
589 set the sizes of the dynamic sections, and may fill in their
590 contents as well. The generic ELF linker can handle the .dynsym,
591 .dynstr and .hash sections. This function must handle the
592 .interp section and any sections created by the
593 CREATE_DYNAMIC_SECTIONS entry point. */
594 boolean (*elf_backend_size_dynamic_sections)
595 PARAMS ((bfd *output_bfd, struct bfd_link_info *info));
597 /* The RELOCATE_SECTION function is called by the ELF backend linker
598 to handle the relocations for a section.
600 The relocs are always passed as Rela structures; if the section
601 actually uses Rel structures, the r_addend field will always be
604 This function is responsible for adjust the section contents as
605 necessary, and (if using Rela relocs and generating a
606 relocateable output file) adjusting the reloc addend as
609 This function does not have to worry about setting the reloc
610 address or the reloc symbol index.
612 LOCAL_SYMS is a pointer to the swapped in local symbols.
614 LOCAL_SECTIONS is an array giving the section in the input file
615 corresponding to the st_shndx field of each local symbol.
617 The global hash table entry for the global symbols can be found
618 via elf_sym_hashes (input_bfd).
620 When generating relocateable output, this function must handle
621 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
622 going to be the section symbol corresponding to the output
623 section, which means that the addend must be adjusted
625 boolean (*elf_backend_relocate_section)
626 PARAMS ((bfd *output_bfd, struct bfd_link_info *info,
627 bfd *input_bfd, asection *input_section, bfd_byte *contents,
628 Elf_Internal_Rela *relocs, Elf_Internal_Sym *local_syms,
629 asection **local_sections));
631 /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend
632 linker just before it writes a symbol out to the .dynsym section.
633 The processor backend may make any required adjustment to the
634 symbol. It may also take the opportunity to set contents of the
635 dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on
636 all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called
637 on those symbols which are defined by a dynamic object. */
638 boolean (*elf_backend_finish_dynamic_symbol)
639 PARAMS ((bfd *output_bfd, struct bfd_link_info *info,
640 struct elf_link_hash_entry *h, Elf_Internal_Sym *sym));
642 /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend
643 linker just before it writes all the dynamic sections out to the
644 output file. The FINISH_DYNAMIC_SYMBOL will have been called on
645 all dynamic symbols. */
646 boolean (*elf_backend_finish_dynamic_sections)
647 PARAMS ((bfd *output_bfd, struct bfd_link_info *info));
649 /* A function to do any beginning processing needed for the ELF file
650 before building the ELF headers and computing file positions. */
651 void (*elf_backend_begin_write_processing)
652 PARAMS ((bfd *, struct bfd_link_info *));
654 /* A function to do any final processing needed for the ELF file
655 before writing it out. The LINKER argument is true if this BFD
656 was created by the ELF backend linker. */
657 void (*elf_backend_final_write_processing)
658 PARAMS ((bfd *, boolean linker));
660 /* This function is called by get_program_header_size. It should
661 return the number of additional program segments which this BFD
662 will need. It should return -1 on error. */
663 int (*elf_backend_additional_program_headers)
666 /* This function is called to modify an existing segment map in a
667 backend specific fashion. */
668 boolean (*elf_backend_modify_segment_map)
671 /* This function is called during section gc to discover the section a
672 particular relocation refers to. It need not be defined for hosts
673 that have no queer relocation types. */
674 asection * (*gc_mark_hook)
675 PARAMS ((bfd *abfd, struct bfd_link_info *, Elf_Internal_Rela *,
676 struct elf_link_hash_entry *h, Elf_Internal_Sym *));
678 /* This function, if defined, is called during the sweep phase of gc
679 in order that a backend might update any data structures it might
681 boolean (*gc_sweep_hook)
682 PARAMS ((bfd *abfd, struct bfd_link_info *info, asection *o,
683 const Elf_Internal_Rela *relocs));
685 /* This function, if defined, is called after the ELF headers have
686 been created. This allows for things like the OS and ABI versions
688 void (*elf_backend_post_process_headers)
689 PARAMS ((bfd *, struct bfd_link_info *));
691 /* This function, if defined, prints a symbol to file and returns the
692 name of the symbol to be printed. It should return NULL to fall
693 back to default symbol printing. */
694 const char *(*elf_backend_print_symbol_all)
695 PARAMS ((bfd *, PTR, asymbol *));
697 /* This function, if defined, is called after all local symbols and
698 global symbols converted to locals are emited into the symtab
699 section. It allows the backend to emit special global symbols
700 not handled in the hash table. */
701 boolean (*elf_backend_output_arch_syms)
702 PARAMS ((bfd *, struct bfd_link_info *, PTR,
703 boolean (*) (PTR, const char *, Elf_Internal_Sym *, asection *)));
705 /* Copy any information related to dynamic linking from a pre-existing
706 symbol to a newly created symbol. Also called to copy flags and
707 other back-end info to a weakdef, in which case the symbol is not
708 newly created and plt/got refcounts and dynamic indices should not
710 void (*elf_backend_copy_indirect_symbol)
711 PARAMS ((struct elf_link_hash_entry *, struct elf_link_hash_entry *));
713 /* Modify any information related to dynamic linking such that the
714 symbol is not exported. */
715 void (*elf_backend_hide_symbol)
716 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, boolean));
718 /* Emit relocations. Overrides default routine for emitting relocs,
719 except during a relocatable link, or if all relocs are being emitted. */
720 boolean (*elf_backend_emit_relocs)
721 PARAMS ((bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *));
723 /* Count relocations. Not called for relocatable links
724 or if all relocs are being preserved in the output. */
725 unsigned int (*elf_backend_count_relocs)
726 PARAMS ((asection *, Elf_Internal_Rela *));
728 /* This function, if defined, is called when an NT_PRSTATUS note is found
730 boolean (*elf_backend_grok_prstatus)
731 PARAMS ((bfd *, Elf_Internal_Note *));
733 /* This function, if defined, is called when an NT_PSINFO or NT_PRPSINFO
734 note is found in a core file. */
735 boolean (*elf_backend_grok_psinfo)
736 PARAMS ((bfd *, Elf_Internal_Note *));
738 /* Functions to print VMAs. Special code to handle 64 bit ELF files. */
739 void (* elf_backend_sprintf_vma)
740 PARAMS ((bfd *, char *, bfd_vma));
741 void (* elf_backend_fprintf_vma)
742 PARAMS ((bfd *, PTR, bfd_vma));
744 /* This function returns class of a reloc type. */
745 enum elf_reloc_type_class (*elf_backend_reloc_type_class)
746 PARAMS ((const Elf_Internal_Rela *));
748 /* This function, if defined, removes information about discarded functions
749 from other sections which mention them. */
750 boolean (*elf_backend_discard_info)
751 PARAMS ((bfd *, struct elf_reloc_cookie *, struct bfd_link_info *));
753 /* This function, if defined, signals that the function above has removed
754 the discarded relocations for this section. */
755 boolean (*elf_backend_ignore_discarded_relocs)
756 PARAMS ((asection *));
758 /* This function, if defined, may write out the given section.
759 Returns true if it did so and false if the caller should. */
760 boolean (*elf_backend_write_section)
761 PARAMS ((bfd *, asection *, bfd_byte *));
763 /* This function, if defined, sets up the file positions for non PT_LOAD
764 segments, especially for segments containing non-allocated sections. */
765 void (*set_nonloadable_filepos)
766 PARAMS ((bfd *, Elf_Internal_Phdr *));
768 /* This function, if defined, returns true if the section is contained
769 within the segment. File positions are compared. */
770 boolean (*is_contained_by_filepos)
771 PARAMS ((asection *, Elf_Internal_Phdr *));
773 /* This function, if defined, returns true if copy_private_bfd_data
774 should be called. It provides a way of overriding default
775 test conditions in _bfd_elf_copy_private_section_data. */
776 boolean (*copy_private_bfd_data_p)
777 PARAMS ((bfd *, asection *, bfd *, asection *));
779 /* The level of IRIX compatibility we're striving for.
780 MIPS ELF specific function. */
781 irix_compat_t (*elf_backend_mips_irix_compat)
784 reloc_howto_type *(*elf_backend_mips_rtype_to_howto)
785 PARAMS ((unsigned int, boolean));
787 /* The swapping table to use when dealing with ECOFF information.
788 Used for the MIPS ELF .mdebug section. */
789 const struct ecoff_debug_swap *elf_backend_ecoff_debug_swap;
791 /* Alternate EM_xxxx machine codes for this backend. */
792 int elf_machine_alt1;
793 int elf_machine_alt2;
795 const struct elf_size_info *s;
797 /* offset of the _GLOBAL_OFFSET_TABLE_ symbol from the start of the
799 bfd_vma got_symbol_offset;
801 /* The size in bytes of the headers for the GOT and PLT. This includes
802 the so-called reserved entries on some systems. */
803 bfd_vma got_header_size;
804 bfd_vma plt_header_size;
806 /* This is true if the linker should act like collect and gather
807 global constructors and destructors by name. This is true for
808 MIPS ELF because the Irix 5 tools can not handle the .init
810 unsigned collect : 1;
812 /* This is true if the linker should ignore changes to the type of a
813 symbol. This is true for MIPS ELF because some Irix 5 objects
814 record undefined functions as STT_OBJECT although the definitions
816 unsigned type_change_ok : 1;
818 /* Whether the backend may use REL relocations. (Some backends use
819 both REL and RELA relocations, and this flag is set for those
821 unsigned may_use_rel_p : 1;
823 /* Whether the backend may use RELA relocations. (Some backends use
824 both REL and RELA relocations, and this flag is set for those
826 unsigned may_use_rela_p : 1;
828 /* Whether the default relocation type is RELA. If a backend with
829 this flag set wants REL relocations for a particular section,
830 it must note that explicitly. Similarly, if this flag is clear,
831 and the backend wants RELA relocations for a particular
833 unsigned default_use_rela_p : 1;
835 /* Set if RELA relocations for a relocatable link can be handled by
836 generic code. Backends that set this flag need do nothing in the
837 backend relocate_section routine for relocatable linking. */
838 unsigned rela_normal : 1;
840 /* True if addresses "naturally" sign extend. This is used when
841 swapping in from Elf32 when BFD64. */
842 unsigned sign_extend_vma : 1;
844 unsigned want_got_plt : 1;
845 unsigned plt_readonly : 1;
846 unsigned want_plt_sym : 1;
847 unsigned plt_not_loaded : 1;
848 unsigned plt_alignment : 4;
849 unsigned can_gc_sections : 1;
850 unsigned can_refcount : 1;
851 unsigned want_got_sym : 1;
852 unsigned want_dynbss : 1;
855 /* Information stored for each BFD section in an ELF file. This
856 structure is allocated by elf_new_section_hook. */
858 struct bfd_elf_section_data
860 /* The ELF header for this section. */
861 Elf_Internal_Shdr this_hdr;
863 /* The ELF header for the reloc section associated with this
865 Elf_Internal_Shdr rel_hdr;
867 /* If there is a second reloc section associated with this section,
868 as can happen on Irix 6, this field points to the header. */
869 Elf_Internal_Shdr *rel_hdr2;
871 /* The number of relocations currently assigned to REL_HDR. */
872 unsigned int rel_count;
874 /* The number of relocations currently assigned to REL_HDR2. */
875 unsigned int rel_count2;
877 /* A pointer to a linked list tracking dynamic relocs copied for
881 /* A pointer to the bfd section used for dynamic relocs. */
884 /* The ELF section number of this section. Only used for an output
888 /* The ELF section number of the reloc section indicated by
889 REL_HDR if any. Only used for an output file. */
892 /* The ELF section number of the reloc section indicated by
893 REL_HDR2 if any. Only used for an output file. */
896 /* Used by the backend linker to store the symbol hash table entries
897 associated with relocs against global symbols. */
898 struct elf_link_hash_entry **rel_hashes;
900 /* A pointer to the swapped relocs. If the section uses REL relocs,
901 rather than RELA, all the r_addend fields will be zero. This
902 pointer may be NULL. It is used by the backend linker. */
903 Elf_Internal_Rela *relocs;
905 /* Used by the backend linker when generating a shared library to
906 record the dynamic symbol index for a section symbol
907 corresponding to this section. A value of 0 means that there is
908 no dynamic symbol for this section. */
911 /* A pointer used for various section optimizations. */
914 /* Type of that information. */
915 enum elf_link_info_type sec_info_type;
917 /* Group name, if this section is part of a group. */
918 const char *group_name;
920 /* A linked list of sections in the group. Circular when used by
922 asection *next_in_group;
924 /* A pointer available for the processor specific ELF backend. */
927 /* Nonzero if this section uses RELA relocations, rather than REL. */
928 unsigned int use_rela_p:1;
930 /* Nonzero when a group is COMDAT. */
931 unsigned int linkonce_p:1;
934 #define elf_section_data(sec) ((struct bfd_elf_section_data*)sec->used_by_bfd)
935 #define elf_group_name(sec) (elf_section_data(sec)->group_name)
936 #define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group)
937 #define elf_linkonce_p(sec) (elf_section_data(sec)->linkonce_p)
939 /* Return true if section has been discarded. */
940 #define elf_discarded_section(sec) \
941 (!bfd_is_abs_section(sec) \
942 && bfd_is_abs_section((sec)->output_section) \
943 && elf_section_data (sec)->sec_info_type != ELF_INFO_TYPE_MERGE \
944 && elf_section_data (sec)->sec_info_type != ELF_INFO_TYPE_JUST_SYMS)
946 #define get_elf_backend_data(abfd) \
947 ((struct elf_backend_data *) (abfd)->xvec->backend_data)
949 /* Enumeration to specify the special section. */
950 typedef enum elf_linker_section_enum
952 LINKER_SECTION_UNKNOWN, /* not used */
953 LINKER_SECTION_GOT, /* .got section for global offset pointers */
954 LINKER_SECTION_PLT, /* .plt section for generated procedure stubs */
955 LINKER_SECTION_SDATA, /* .sdata/.sbss section for PowerPC */
956 LINKER_SECTION_SDATA2, /* .sdata2/.sbss2 section for PowerPC */
957 LINKER_SECTION_MAX /* # of linker sections */
958 } elf_linker_section_enum_t;
960 /* Sections created by the linker. */
962 typedef struct elf_linker_section
964 char *name; /* name of the section */
965 char *rel_name; /* name of the associated .rel{,a}. section */
966 char *bss_name; /* name of a related .bss section */
967 char *sym_name; /* name of symbol to reference this section */
968 asection *section; /* pointer to the section */
969 asection *bss_section; /* pointer to the bss section associated with this */
970 asection *rel_section; /* pointer to the relocations needed for this section */
971 struct elf_link_hash_entry *sym_hash; /* pointer to the created symbol hash value */
972 bfd_vma initial_size; /* initial size before any linker generated allocations */
973 bfd_vma sym_offset; /* offset of symbol from beginning of section */
974 bfd_vma hole_size; /* size of reserved address hole in allocation */
975 bfd_vma hole_offset; /* current offset for the hole */
976 bfd_vma max_hole_offset; /* maximum offset for the hole */
977 elf_linker_section_enum_t which; /* which section this is */
978 boolean hole_written_p; /* whether the hole has been initialized */
979 unsigned int alignment; /* alignment for the section */
980 flagword flags; /* flags to use to create the section */
981 } elf_linker_section_t;
983 /* Linked list of allocated pointer entries. This hangs off of the symbol lists, and
984 provides allows us to return different pointers, based on different addend's. */
986 typedef struct elf_linker_section_pointers
988 struct elf_linker_section_pointers *next; /* next allocated pointer for this symbol */
989 bfd_vma offset; /* offset of pointer from beginning of section */
990 bfd_vma addend; /* addend used */
991 elf_linker_section_enum_t which; /* which linker section this is */
992 boolean written_address_p; /* whether address was written yet */
993 } elf_linker_section_pointers_t;
995 /* Some private data is stashed away for future use using the tdata pointer
996 in the bfd structure. */
1000 Elf_Internal_Ehdr elf_header[1]; /* Actual data, but ref like ptr */
1001 Elf_Internal_Shdr **elf_sect_ptr;
1002 Elf_Internal_Phdr *phdr;
1003 struct elf_segment_map *segment_map;
1004 struct elf_strtab_hash *strtab_ptr;
1007 unsigned int num_elf_sections; /* elf_sect_ptr size */
1008 int num_section_syms;
1009 asymbol **section_syms; /* STT_SECTION symbols for each section */
1010 Elf_Internal_Shdr symtab_hdr;
1011 Elf_Internal_Shdr shstrtab_hdr;
1012 Elf_Internal_Shdr strtab_hdr;
1013 Elf_Internal_Shdr dynsymtab_hdr;
1014 Elf_Internal_Shdr dynstrtab_hdr;
1015 Elf_Internal_Shdr dynversym_hdr;
1016 Elf_Internal_Shdr dynverref_hdr;
1017 Elf_Internal_Shdr dynverdef_hdr;
1018 Elf_Internal_Shdr symtab_shndx_hdr;
1019 unsigned int symtab_section, shstrtab_section;
1020 unsigned int strtab_section, dynsymtab_section;
1021 unsigned int symtab_shndx_section;
1022 unsigned int dynversym_section, dynverdef_section, dynverref_section;
1023 file_ptr next_file_pos;
1025 /* we don't need these inside bfd anymore, and I think
1026 these weren't used outside bfd. */
1027 void *prstatus; /* The raw /proc prstatus structure */
1028 void *prpsinfo; /* The raw /proc prpsinfo structure */
1030 bfd_vma gp; /* The gp value */
1031 unsigned int gp_size; /* The gp size */
1033 Elf_Internal_Shdr **group_sect_ptr;
1036 /* Information grabbed from an elf core file. */
1043 /* This is set to true if the object was created by the backend
1047 /* A mapping from external symbols to entries in the linker hash
1048 table, used when linking. This is indexed by the symbol index
1049 minus the sh_info field of the symbol table header. */
1050 struct elf_link_hash_entry **sym_hashes;
1052 /* A mapping from local symbols to offsets into the global offset
1053 table, used when linking. This is indexed by the symbol index.
1054 Like for the globals, we use a union and two names primarily to
1055 document the intent of any particular piece of code. The field
1056 should be used as a count until size_dynamic_sections, at which
1057 point the contents of the .got is fixed. Afterward, if an entry
1058 is -1, then the symbol does not require a global offset table entry. */
1061 bfd_signed_vma *refcounts;
1065 /* A mapping from local symbols to offsets into the various linker
1066 sections added. This is index by the symbol index. */
1067 elf_linker_section_pointers_t **linker_section_pointers;
1069 /* The linker ELF emulation code needs to let the backend ELF linker
1070 know what filename should be used for a dynamic object if the
1071 dynamic object is found using a search. The emulation code then
1072 sometimes needs to know what name was actually used. Until the
1073 file has been added to the linker symbol table, this field holds
1074 the name the linker wants. After it has been added, it holds the
1075 name actually used, which will be the DT_SONAME entry if there is
1077 const char *dt_name;
1079 /* When a reference in a regular object is resolved by a shared
1080 object is loaded into via the DT_NEEDED entries by the linker
1081 ELF emulation code, we need to add the shared object to the
1082 DT_NEEDED list of the resulting binary to indicate the dependency
1083 as if the -l option is passed to the linker. This field holds the
1084 name of the loaded shared object. */
1085 const char *dt_soname;
1087 /* Irix 5 often screws up the symbol table, sorting local symbols
1088 after global symbols. This flag is set if the symbol table in
1089 this BFD appears to be screwed up. If it is, we ignore the
1090 sh_info field in the symbol table header, and always read all the
1094 /* Records the result of `get_program_header_size'. */
1095 bfd_size_type program_header_size;
1097 /* Used by find_nearest_line entry point. */
1100 /* Used by MIPS ELF find_nearest_line entry point. The structure
1101 could be included directly in this one, but there's no point to
1102 wasting the memory just for the infrequently called
1103 find_nearest_line. */
1104 struct mips_elf_find_line *find_line_info;
1106 /* A place to stash dwarf1 info for this bfd. */
1107 struct dwarf1_debug *dwarf1_find_line_info;
1109 /* A place to stash dwarf2 info for this bfd. */
1110 PTR dwarf2_find_line_info;
1112 /* An array of stub sections indexed by symbol number, used by the
1113 MIPS ELF linker. FIXME: We should figure out some way to only
1114 include this field for a MIPS ELF target. */
1115 asection **local_stubs;
1117 /* Used to determine if the e_flags field has been initialized */
1120 /* Used to determine if PT_GNU_EH_FRAME segment header should be
1122 boolean eh_frame_hdr;
1124 /* Number of symbol version definitions we are about to emit. */
1125 unsigned int cverdefs;
1127 /* Number of symbol version references we are about to emit. */
1128 unsigned int cverrefs;
1130 /* Symbol version definitions in external objects. */
1131 Elf_Internal_Verdef *verdef;
1133 /* Symbol version references to external objects. */
1134 Elf_Internal_Verneed *verref;
1136 /* Linker sections that we are interested in. */
1137 struct elf_linker_section *linker_section[ (int)LINKER_SECTION_MAX ];
1139 /* The Irix 5 support uses two virtual sections, which represent
1140 text/data symbols defined in dynamic objects. */
1141 asymbol *elf_data_symbol;
1142 asymbol *elf_text_symbol;
1143 asection *elf_data_section;
1144 asection *elf_text_section;
1147 #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
1148 #define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header)
1149 #define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr)
1150 #define elf_numsections(bfd) (elf_tdata(bfd) -> num_elf_sections)
1151 #define elf_shstrtab(bfd) (elf_tdata(bfd) -> strtab_ptr)
1152 #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section)
1153 #define elf_symtab_shndx(bfd) (elf_tdata(bfd) -> symtab_shndx_section)
1154 #define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section)
1155 #define elf_dynversym(bfd) (elf_tdata(bfd) -> dynversym_section)
1156 #define elf_dynverdef(bfd) (elf_tdata(bfd) -> dynverdef_section)
1157 #define elf_dynverref(bfd) (elf_tdata(bfd) -> dynverref_section)
1158 #define elf_num_locals(bfd) (elf_tdata(bfd) -> num_locals)
1159 #define elf_num_globals(bfd) (elf_tdata(bfd) -> num_globals)
1160 #define elf_section_syms(bfd) (elf_tdata(bfd) -> section_syms)
1161 #define elf_num_section_syms(bfd) (elf_tdata(bfd) -> num_section_syms)
1162 #define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
1163 #define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
1164 #define elf_gp(bfd) (elf_tdata(bfd) -> gp)
1165 #define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size)
1166 #define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes)
1167 #define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts)
1168 #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets)
1169 #define elf_local_ptr_offsets(bfd) (elf_tdata(bfd) -> linker_section_pointers)
1170 #define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name)
1171 #define elf_dt_soname(bfd) (elf_tdata(bfd) -> dt_soname)
1172 #define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab)
1173 #define elf_flags_init(bfd) (elf_tdata(bfd) -> flags_init)
1174 #define elf_linker_section(bfd,n) (elf_tdata(bfd) -> linker_section[(int)n])
1176 extern void _bfd_elf_swap_verdef_in
1177 PARAMS ((bfd *, const Elf_External_Verdef *, Elf_Internal_Verdef *));
1178 extern void _bfd_elf_swap_verdef_out
1179 PARAMS ((bfd *, const Elf_Internal_Verdef *, Elf_External_Verdef *));
1180 extern void _bfd_elf_swap_verdaux_in
1181 PARAMS ((bfd *, const Elf_External_Verdaux *, Elf_Internal_Verdaux *));
1182 extern void _bfd_elf_swap_verdaux_out
1183 PARAMS ((bfd *, const Elf_Internal_Verdaux *, Elf_External_Verdaux *));
1184 extern void _bfd_elf_swap_verneed_in
1185 PARAMS ((bfd *, const Elf_External_Verneed *, Elf_Internal_Verneed *));
1186 extern void _bfd_elf_swap_verneed_out
1187 PARAMS ((bfd *, const Elf_Internal_Verneed *, Elf_External_Verneed *));
1188 extern void _bfd_elf_swap_vernaux_in
1189 PARAMS ((bfd *, const Elf_External_Vernaux *, Elf_Internal_Vernaux *));
1190 extern void _bfd_elf_swap_vernaux_out
1191 PARAMS ((bfd *, const Elf_Internal_Vernaux *, Elf_External_Vernaux *));
1192 extern void _bfd_elf_swap_versym_in
1193 PARAMS ((bfd *, const Elf_External_Versym *, Elf_Internal_Versym *));
1194 extern void _bfd_elf_swap_versym_out
1195 PARAMS ((bfd *, const Elf_Internal_Versym *, Elf_External_Versym *));
1197 extern int _bfd_elf_section_from_bfd_section
1198 PARAMS ((bfd *, asection *));
1199 extern char *bfd_elf_string_from_elf_section
1200 PARAMS ((bfd *, unsigned, unsigned));
1201 extern char *bfd_elf_get_str_section
1202 PARAMS ((bfd *, unsigned));
1204 extern boolean _bfd_elf_copy_private_bfd_data
1205 PARAMS ((bfd *, bfd *));
1206 extern boolean _bfd_elf_print_private_bfd_data
1207 PARAMS ((bfd *, PTR));
1208 extern void bfd_elf_print_symbol
1209 PARAMS ((bfd *, PTR, asymbol *, bfd_print_symbol_type));
1211 #define elf_string_from_elf_strtab(abfd, strindex) \
1212 bfd_elf_string_from_elf_section(abfd, elf_elfheader(abfd)->e_shstrndx, \
1215 #define bfd_elf32_print_symbol bfd_elf_print_symbol
1216 #define bfd_elf64_print_symbol bfd_elf_print_symbol
1218 extern void _bfd_elf_sprintf_vma
1219 PARAMS ((bfd *, char *, bfd_vma));
1220 extern void _bfd_elf_fprintf_vma
1221 PARAMS ((bfd *, PTR, bfd_vma));
1223 extern enum elf_reloc_type_class _bfd_elf_reloc_type_class
1224 PARAMS ((const Elf_Internal_Rela *));
1225 extern bfd_vma _bfd_elf_rela_local_sym
1226 PARAMS ((bfd *, Elf_Internal_Sym *, asection *, Elf_Internal_Rela *));
1227 extern bfd_vma _bfd_elf_rel_local_sym
1228 PARAMS ((bfd *, Elf_Internal_Sym *, asection **, bfd_vma));
1229 extern bfd_vma _bfd_elf_section_offset
1230 PARAMS ((bfd *, struct bfd_link_info *, asection *, bfd_vma));
1232 extern unsigned long bfd_elf_hash
1233 PARAMS ((const char *));
1235 extern bfd_reloc_status_type bfd_elf_generic_reloc
1236 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
1237 extern boolean bfd_elf_mkobject
1239 extern boolean bfd_elf_mkcorefile
1241 extern Elf_Internal_Shdr *bfd_elf_find_section
1242 PARAMS ((bfd *, char *));
1243 extern boolean _bfd_elf_make_section_from_shdr
1244 PARAMS ((bfd *, Elf_Internal_Shdr *, const char *));
1245 extern boolean _bfd_elf_make_section_from_phdr
1246 PARAMS ((bfd *, Elf_Internal_Phdr *, int, const char *));
1247 extern struct bfd_hash_entry *_bfd_elf_link_hash_newfunc
1248 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
1249 extern struct bfd_link_hash_table *_bfd_elf_link_hash_table_create
1251 extern void _bfd_elf_link_hash_copy_indirect
1252 PARAMS ((struct elf_link_hash_entry *, struct elf_link_hash_entry *));
1253 extern void _bfd_elf_link_hash_hide_symbol
1254 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, boolean));
1255 extern boolean _bfd_elf_link_hash_table_init
1256 PARAMS ((struct elf_link_hash_table *, bfd *,
1257 struct bfd_hash_entry *(*) (struct bfd_hash_entry *,
1258 struct bfd_hash_table *,
1260 extern boolean _bfd_elf_slurp_version_tables
1262 extern boolean _bfd_elf_merge_sections
1263 PARAMS ((bfd *, struct bfd_link_info *));
1264 extern void _bfd_elf_link_just_syms
1265 PARAMS ((asection *, struct bfd_link_info *));
1266 extern boolean _bfd_elf_copy_private_symbol_data
1267 PARAMS ((bfd *, asymbol *, bfd *, asymbol *));
1268 extern boolean _bfd_elf_copy_private_section_data
1269 PARAMS ((bfd *, asection *, bfd *, asection *));
1270 extern boolean _bfd_elf_write_object_contents
1272 extern boolean _bfd_elf_write_corefile_contents
1274 extern boolean _bfd_elf_set_section_contents
1275 PARAMS ((bfd *, sec_ptr, PTR, file_ptr, bfd_size_type));
1276 extern long _bfd_elf_get_symtab_upper_bound
1278 extern long _bfd_elf_get_symtab
1279 PARAMS ((bfd *, asymbol **));
1280 extern long _bfd_elf_get_dynamic_symtab_upper_bound
1282 extern long _bfd_elf_canonicalize_dynamic_symtab
1283 PARAMS ((bfd *, asymbol **));
1284 extern long _bfd_elf_get_reloc_upper_bound
1285 PARAMS ((bfd *, sec_ptr));
1286 extern long _bfd_elf_canonicalize_reloc
1287 PARAMS ((bfd *, sec_ptr, arelent **, asymbol **));
1288 extern long _bfd_elf_get_dynamic_reloc_upper_bound
1290 extern long _bfd_elf_canonicalize_dynamic_reloc
1291 PARAMS ((bfd *, arelent **, asymbol **));
1292 extern asymbol *_bfd_elf_make_empty_symbol
1294 extern void _bfd_elf_get_symbol_info
1295 PARAMS ((bfd *, asymbol *, symbol_info *));
1296 extern boolean _bfd_elf_is_local_label_name
1297 PARAMS ((bfd *, const char *));
1298 extern alent *_bfd_elf_get_lineno
1299 PARAMS ((bfd *, asymbol *));
1300 extern boolean _bfd_elf_set_arch_mach
1301 PARAMS ((bfd *, enum bfd_architecture, unsigned long));
1302 extern boolean _bfd_elf_find_nearest_line
1303 PARAMS ((bfd *, asection *, asymbol **, bfd_vma, const char **,
1304 const char **, unsigned int *));
1305 #define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols
1306 #define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
1307 extern int _bfd_elf_sizeof_headers
1308 PARAMS ((bfd *, boolean));
1309 extern boolean _bfd_elf_new_section_hook
1310 PARAMS ((bfd *, asection *));
1311 extern boolean _bfd_elf_init_reloc_shdr
1312 PARAMS ((bfd *, Elf_Internal_Shdr *, asection *, boolean));
1314 /* If the target doesn't have reloc handling written yet: */
1315 extern void _bfd_elf_no_info_to_howto
1316 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
1318 extern boolean bfd_section_from_shdr
1319 PARAMS ((bfd *, unsigned int shindex));
1320 extern boolean bfd_section_from_phdr
1321 PARAMS ((bfd *, Elf_Internal_Phdr *, int));
1323 extern int _bfd_elf_symbol_from_bfd_symbol
1324 PARAMS ((bfd *, asymbol **));
1326 extern asection *bfd_section_from_r_symndx
1327 PARAMS ((bfd *, struct sym_sec_cache *, asection *, unsigned long));
1328 extern asection *bfd_section_from_elf_index
1329 PARAMS ((bfd *, unsigned int));
1330 extern boolean _bfd_elf_create_dynamic_sections
1331 PARAMS ((bfd *, struct bfd_link_info *));
1332 extern struct bfd_strtab_hash *_bfd_elf_stringtab_init
1335 extern struct elf_strtab_hash * _bfd_elf_strtab_init
1337 extern void _bfd_elf_strtab_free
1338 PARAMS ((struct elf_strtab_hash *));
1339 extern bfd_size_type _bfd_elf_strtab_add
1340 PARAMS ((struct elf_strtab_hash *, const char *, boolean));
1341 extern void _bfd_elf_strtab_addref
1342 PARAMS ((struct elf_strtab_hash *, bfd_size_type));
1343 extern void _bfd_elf_strtab_delref
1344 PARAMS ((struct elf_strtab_hash *, bfd_size_type));
1345 extern void _bfd_elf_strtab_clear_all_refs
1346 PARAMS ((struct elf_strtab_hash *));
1347 extern bfd_size_type _bfd_elf_strtab_size
1348 PARAMS ((struct elf_strtab_hash *));
1349 extern bfd_size_type _bfd_elf_strtab_offset
1350 PARAMS ((struct elf_strtab_hash *, bfd_size_type));
1351 extern boolean _bfd_elf_strtab_emit
1352 PARAMS ((bfd *, struct elf_strtab_hash *));
1353 extern void _bfd_elf_strtab_finalize
1354 PARAMS ((struct elf_strtab_hash *));
1356 extern boolean _bfd_elf_discard_section_eh_frame
1357 PARAMS ((bfd *, struct bfd_link_info *, asection *, asection *,
1358 boolean (*) (bfd_vma, PTR), struct elf_reloc_cookie *));
1359 extern boolean _bfd_elf_discard_section_eh_frame_hdr
1360 PARAMS ((bfd *, struct bfd_link_info *, asection *));
1361 extern bfd_vma _bfd_elf_eh_frame_section_offset
1362 PARAMS ((bfd *, asection *, bfd_vma));
1363 extern boolean _bfd_elf_write_section_eh_frame
1364 PARAMS ((bfd *, asection *, asection *, bfd_byte *));
1365 extern boolean _bfd_elf_write_section_eh_frame_hdr
1366 PARAMS ((bfd *, asection *));
1367 extern boolean _bfd_elf_maybe_strip_eh_frame_hdr
1368 PARAMS ((struct bfd_link_info *));
1370 extern boolean _bfd_elf_link_record_dynamic_symbol
1371 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
1372 extern long _bfd_elf_link_lookup_local_dynindx
1373 PARAMS ((struct bfd_link_info *, bfd *, long));
1374 extern boolean _bfd_elf_compute_section_file_positions
1375 PARAMS ((bfd *, struct bfd_link_info *));
1376 extern void _bfd_elf_assign_file_positions_for_relocs
1378 extern file_ptr _bfd_elf_assign_file_position_for_section
1379 PARAMS ((Elf_Internal_Shdr *, file_ptr, boolean));
1381 extern boolean _bfd_elf_validate_reloc
1382 PARAMS ((bfd *, arelent *));
1384 extern boolean _bfd_elf_create_dynamic_sections
1385 PARAMS ((bfd *, struct bfd_link_info *));
1386 extern boolean _bfd_elf_create_got_section
1387 PARAMS ((bfd *, struct bfd_link_info *));
1388 extern unsigned long _bfd_elf_link_renumber_dynsyms
1389 PARAMS ((bfd *, struct bfd_link_info *));
1391 extern boolean _bfd_elfcore_make_pseudosection
1392 PARAMS ((bfd *, char *, size_t, ufile_ptr));
1393 extern char *_bfd_elfcore_strndup
1394 PARAMS ((bfd *, char *, size_t));
1396 extern elf_linker_section_t *_bfd_elf_create_linker_section
1397 PARAMS ((bfd *, struct bfd_link_info *, enum elf_linker_section_enum,
1398 elf_linker_section_t *));
1400 extern elf_linker_section_pointers_t *_bfd_elf_find_pointer_linker_section
1401 PARAMS ((elf_linker_section_pointers_t *, bfd_vma,
1402 elf_linker_section_enum_t));
1404 extern boolean bfd_elf32_create_pointer_linker_section
1405 PARAMS ((bfd *, struct bfd_link_info *, elf_linker_section_t *,
1406 struct elf_link_hash_entry *, const Elf32_Internal_Rela *));
1408 extern bfd_vma bfd_elf32_finish_pointer_linker_section
1409 PARAMS ((bfd *, bfd *, struct bfd_link_info *, elf_linker_section_t *,
1410 struct elf_link_hash_entry *, bfd_vma,
1411 const Elf32_Internal_Rela *, int));
1413 extern boolean bfd_elf64_create_pointer_linker_section
1414 PARAMS ((bfd *, struct bfd_link_info *, elf_linker_section_t *,
1415 struct elf_link_hash_entry *, const Elf64_Internal_Rela *));
1417 extern bfd_vma bfd_elf64_finish_pointer_linker_section
1418 PARAMS ((bfd *, bfd *, struct bfd_link_info *, elf_linker_section_t *,
1419 struct elf_link_hash_entry *, bfd_vma,
1420 const Elf64_Internal_Rela *, int));
1422 extern boolean _bfd_elf_make_linker_section_rela
1423 PARAMS ((bfd *, elf_linker_section_t *, int));
1425 extern const bfd_target *bfd_elf32_object_p
1427 extern const bfd_target *bfd_elf32_core_file_p
1429 extern char *bfd_elf32_core_file_failing_command
1431 extern int bfd_elf32_core_file_failing_signal
1433 extern boolean bfd_elf32_core_file_matches_executable_p
1434 PARAMS ((bfd *, bfd *));
1436 extern boolean bfd_elf32_bfd_link_add_symbols
1437 PARAMS ((bfd *, struct bfd_link_info *));
1438 extern boolean bfd_elf32_bfd_final_link
1439 PARAMS ((bfd *, struct bfd_link_info *));
1441 extern void bfd_elf32_swap_symbol_in
1442 PARAMS ((bfd *, const Elf32_External_Sym *, const Elf_External_Sym_Shndx *,
1443 Elf_Internal_Sym *));
1444 extern void bfd_elf32_swap_symbol_out
1445 PARAMS ((bfd *, const Elf_Internal_Sym *, PTR, PTR));
1446 extern void bfd_elf32_swap_reloc_in
1447 PARAMS ((bfd *, const Elf32_External_Rel *, Elf_Internal_Rel *));
1448 extern void bfd_elf32_swap_reloc_out
1449 PARAMS ((bfd *, const Elf_Internal_Rel *, Elf32_External_Rel *));
1450 extern void bfd_elf32_swap_reloca_in
1451 PARAMS ((bfd *, const Elf32_External_Rela *, Elf_Internal_Rela *));
1452 extern void bfd_elf32_swap_reloca_out
1453 PARAMS ((bfd *, const Elf_Internal_Rela *, Elf32_External_Rela *));
1454 extern void bfd_elf32_swap_phdr_in
1455 PARAMS ((bfd *, const Elf32_External_Phdr *, Elf_Internal_Phdr *));
1456 extern void bfd_elf32_swap_phdr_out
1457 PARAMS ((bfd *, const Elf_Internal_Phdr *, Elf32_External_Phdr *));
1458 extern void bfd_elf32_swap_dyn_in
1459 PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *));
1460 extern void bfd_elf32_swap_dyn_out
1461 PARAMS ((bfd *, const Elf_Internal_Dyn *, PTR));
1462 extern long bfd_elf32_slurp_symbol_table
1463 PARAMS ((bfd *, asymbol **, boolean));
1464 extern boolean bfd_elf32_write_shdrs_and_ehdr
1466 extern int bfd_elf32_write_out_phdrs
1467 PARAMS ((bfd *, const Elf_Internal_Phdr *, unsigned int));
1468 extern void bfd_elf32_write_relocs
1469 PARAMS ((bfd *, asection *, PTR));
1470 extern boolean bfd_elf32_slurp_reloc_table
1471 PARAMS ((bfd *, asection *, asymbol **, boolean));
1472 extern boolean bfd_elf32_add_dynamic_entry
1473 PARAMS ((struct bfd_link_info *, bfd_vma, bfd_vma));
1474 extern boolean bfd_elf32_link_create_dynamic_sections
1475 PARAMS ((bfd *, struct bfd_link_info *));
1476 extern Elf_Internal_Rela *_bfd_elf32_link_read_relocs
1477 PARAMS ((bfd *, asection *, PTR, Elf_Internal_Rela *, boolean));
1479 extern const bfd_target *bfd_elf64_object_p
1481 extern const bfd_target *bfd_elf64_core_file_p
1483 extern char *bfd_elf64_core_file_failing_command
1485 extern int bfd_elf64_core_file_failing_signal
1487 extern boolean bfd_elf64_core_file_matches_executable_p
1488 PARAMS ((bfd *, bfd *));
1489 extern boolean bfd_elf64_bfd_link_add_symbols
1490 PARAMS ((bfd *, struct bfd_link_info *));
1491 extern boolean bfd_elf64_bfd_final_link
1492 PARAMS ((bfd *, struct bfd_link_info *));
1494 extern void bfd_elf64_swap_symbol_in
1495 PARAMS ((bfd *, const Elf64_External_Sym *, const Elf_External_Sym_Shndx *,
1496 Elf_Internal_Sym *));
1497 extern void bfd_elf64_swap_symbol_out
1498 PARAMS ((bfd *, const Elf_Internal_Sym *, PTR, PTR));
1499 extern void bfd_elf64_swap_reloc_in
1500 PARAMS ((bfd *, const Elf64_External_Rel *, Elf_Internal_Rel *));
1501 extern void bfd_elf64_swap_reloc_out
1502 PARAMS ((bfd *, const Elf_Internal_Rel *, Elf64_External_Rel *));
1503 extern void bfd_elf64_swap_reloca_in
1504 PARAMS ((bfd *, const Elf64_External_Rela *, Elf_Internal_Rela *));
1505 extern void bfd_elf64_swap_reloca_out
1506 PARAMS ((bfd *, const Elf_Internal_Rela *, Elf64_External_Rela *));
1507 extern void bfd_elf64_swap_phdr_in
1508 PARAMS ((bfd *, const Elf64_External_Phdr *, Elf_Internal_Phdr *));
1509 extern void bfd_elf64_swap_phdr_out
1510 PARAMS ((bfd *, const Elf_Internal_Phdr *, Elf64_External_Phdr *));
1511 extern void bfd_elf64_swap_dyn_in
1512 PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *));
1513 extern void bfd_elf64_swap_dyn_out
1514 PARAMS ((bfd *, const Elf_Internal_Dyn *, PTR));
1515 extern long bfd_elf64_slurp_symbol_table
1516 PARAMS ((bfd *, asymbol **, boolean));
1517 extern boolean bfd_elf64_write_shdrs_and_ehdr
1519 extern int bfd_elf64_write_out_phdrs
1520 PARAMS ((bfd *, const Elf_Internal_Phdr *, unsigned int));
1521 extern void bfd_elf64_write_relocs
1522 PARAMS ((bfd *, asection *, PTR));
1523 extern boolean bfd_elf64_slurp_reloc_table
1524 PARAMS ((bfd *, asection *, asymbol **, boolean));
1525 extern boolean bfd_elf64_add_dynamic_entry
1526 PARAMS ((struct bfd_link_info *, bfd_vma, bfd_vma));
1527 extern boolean bfd_elf64_link_create_dynamic_sections
1528 PARAMS ((bfd *, struct bfd_link_info *));
1529 extern Elf_Internal_Rela *_bfd_elf64_link_read_relocs
1530 PARAMS ((bfd *, asection *, PTR, Elf_Internal_Rela *, boolean));
1532 #define bfd_elf32_link_record_dynamic_symbol \
1533 _bfd_elf_link_record_dynamic_symbol
1534 #define bfd_elf64_link_record_dynamic_symbol \
1535 _bfd_elf_link_record_dynamic_symbol
1537 extern boolean _bfd_elf32_link_record_local_dynamic_symbol
1538 PARAMS ((struct bfd_link_info *, bfd *, long));
1539 extern boolean _bfd_elf64_link_record_local_dynamic_symbol
1540 PARAMS ((struct bfd_link_info *, bfd *, long));
1542 extern boolean _bfd_elf_close_and_cleanup
1544 extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn
1545 PARAMS ((bfd *, arelent *, struct symbol_cache_entry *, PTR,
1546 asection *, bfd *, char **));
1548 extern boolean _bfd_elf32_gc_sections
1549 PARAMS ((bfd *, struct bfd_link_info *));
1550 extern boolean _bfd_elf32_gc_common_finalize_got_offsets
1551 PARAMS ((bfd *, struct bfd_link_info *));
1552 extern boolean _bfd_elf32_gc_common_final_link
1553 PARAMS ((bfd *, struct bfd_link_info *));
1554 extern boolean _bfd_elf32_gc_record_vtinherit
1555 PARAMS ((bfd *, asection *, struct elf_link_hash_entry *, bfd_vma));
1556 extern boolean _bfd_elf32_gc_record_vtentry
1557 PARAMS ((bfd *, asection *, struct elf_link_hash_entry *, bfd_vma));
1559 extern boolean _bfd_elf64_gc_sections
1560 PARAMS ((bfd *, struct bfd_link_info *));
1561 extern boolean _bfd_elf64_gc_common_finalize_got_offsets
1562 PARAMS ((bfd *, struct bfd_link_info *));
1563 extern boolean _bfd_elf64_gc_common_final_link
1564 PARAMS ((bfd *, struct bfd_link_info *));
1565 extern boolean _bfd_elf64_gc_record_vtinherit
1566 PARAMS ((bfd *, asection *, struct elf_link_hash_entry *, bfd_vma));
1567 extern boolean _bfd_elf64_gc_record_vtentry
1568 PARAMS ((bfd *, asection *, struct elf_link_hash_entry *, bfd_vma));
1570 extern boolean _bfd_elf32_reloc_symbol_deleted_p
1571 PARAMS ((bfd_vma, PTR));
1572 extern boolean _bfd_elf64_reloc_symbol_deleted_p
1573 PARAMS ((bfd_vma, PTR));
1575 /* Exported interface for writing elf corefile notes. */
1576 extern char *elfcore_write_note
1577 PARAMS ((bfd *, char *, int *, char *, int, void *, int));
1578 extern char *elfcore_write_prpsinfo
1579 PARAMS ((bfd *, char *, int *, char *, char *));
1580 extern char *elfcore_write_prstatus
1581 PARAMS ((bfd *, char *, int *, long, int, void *));
1582 extern char * elfcore_write_pstatus
1583 PARAMS ((bfd *, char *, int *, long, int, void *));
1584 extern char *elfcore_write_prfpreg
1585 PARAMS ((bfd *, char *, int *, void *, int));
1586 extern char *elfcore_write_prxfpreg
1587 PARAMS ((bfd *, char *, int *, void *, int));
1588 extern char *elfcore_write_lwpstatus
1589 PARAMS ((bfd*, char*, int*, long, int, void*));
1591 /* SH ELF specific routine. */
1593 extern boolean _sh_elf_set_mach_from_flags
1596 #endif /* _LIBELF_H_ */