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,
236 /* ELF linker hash table. */
238 struct elf_link_hash_table
240 struct bfd_link_hash_table root;
242 /* Whether we have created the special dynamic sections required
243 when linking against or generating a shared object. */
244 boolean dynamic_sections_created;
246 /* The BFD used to hold special sections created by the linker.
247 This will be the first BFD found which requires these sections to
251 /* The value to use when initialising got.refcount/offset and
252 plt.refcount/offset in an elf_link_hash_entry. Set to zero when
253 the values are refcounts. Set to -1 in size_dynamic_sections
254 when the values may be offsets. */
255 bfd_signed_vma init_refcount;
257 /* The number of symbols found in the link which must be put into
258 the .dynsym section. */
259 bfd_size_type dynsymcount;
261 /* The string table of dynamic symbols, which becomes the .dynstr
263 struct elf_strtab_hash *dynstr;
265 /* The number of buckets in the hash table in the .hash section.
266 This is based on the number of dynamic symbols. */
267 bfd_size_type bucketcount;
269 /* A linked list of DT_NEEDED names found in dynamic objects
270 included in the link. */
271 struct bfd_link_needed_list *needed;
273 /* The _GLOBAL_OFFSET_TABLE_ symbol. */
274 struct elf_link_hash_entry *hgot;
276 /* A pointer to information used to link stabs in sections. */
279 /* A pointer to information used to merge SEC_MERGE sections. */
282 /* A linked list of local symbols to be added to .dynsym. */
283 struct elf_link_local_dynamic_entry *dynlocal;
285 /* A linked list of DT_RPATH/DT_RUNPATH names found in dynamic
286 objects included in the link. */
287 struct bfd_link_needed_list *runpath;
290 /* Look up an entry in an ELF linker hash table. */
292 #define elf_link_hash_lookup(table, string, create, copy, follow) \
293 ((struct elf_link_hash_entry *) \
294 bfd_link_hash_lookup (&(table)->root, (string), (create), \
297 /* Traverse an ELF linker hash table. */
299 #define elf_link_hash_traverse(table, func, info) \
300 (bfd_link_hash_traverse \
302 (boolean (*) PARAMS ((struct bfd_link_hash_entry *, PTR))) (func), \
305 /* Get the ELF linker hash table from a link_info structure. */
307 #define elf_hash_table(p) ((struct elf_link_hash_table *) ((p)->hash))
309 /* Returns true if the hash table is a struct elf_link_hash_table. */
310 #define is_elf_hash_table(p) \
311 ((p)->hash->type == bfd_link_elf_hash_table)
313 /* Used by bfd_section_from_r_symndx to cache a small number of local
314 symbol to section mappings. */
315 #define LOCAL_SYM_CACHE_SIZE 32
319 unsigned long indx[LOCAL_SYM_CACHE_SIZE];
320 asection *sec[LOCAL_SYM_CACHE_SIZE];
323 /* Constant information held for an ELF backend. */
325 struct elf_size_info {
326 unsigned char sizeof_ehdr, sizeof_phdr, sizeof_shdr;
327 unsigned char sizeof_rel, sizeof_rela, sizeof_sym, sizeof_dyn, sizeof_note;
329 /* The size of entries in the .hash section. */
330 unsigned char sizeof_hash_entry;
332 /* The number of internal relocations to allocate per external
334 unsigned char int_rels_per_ext_rel;
336 unsigned char arch_size, file_align;
337 unsigned char elfclass, ev_current;
338 int (*write_out_phdrs)
339 PARAMS ((bfd *, const Elf_Internal_Phdr *, unsigned int));
340 boolean (*write_shdrs_and_ehdr)
343 PARAMS ((bfd *, asection *, PTR));
344 void (*swap_symbol_out)
345 PARAMS ((bfd *, const Elf_Internal_Sym *, PTR, PTR));
346 boolean (*slurp_reloc_table)
347 PARAMS ((bfd *, asection *, asymbol **, boolean));
348 long (*slurp_symbol_table)
349 PARAMS ((bfd *, asymbol **, boolean));
351 PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *));
353 PARAMS ((bfd *, const Elf_Internal_Dyn *, PTR));
355 /* This function, if defined, is called to swap in a REL
356 relocation. If an external relocation corresponds to more than
357 one internal relocation, then all relocations are swapped in at
359 void (*swap_reloc_in)
360 PARAMS ((bfd *, const bfd_byte *, Elf_Internal_Rel *));
362 /* This function, if defined, is called to swap out a REL
364 void (*swap_reloc_out)
365 PARAMS ((bfd *, const Elf_Internal_Rel *, bfd_byte *));
367 /* This function, if defined, is called to swap in a RELA
368 relocation. If an external relocation corresponds to more than
369 one internal relocation, then all relocations are swapped in at
371 void (*swap_reloca_in)
372 PARAMS ((bfd *, const bfd_byte *, Elf_Internal_Rela *));
374 /* This function, if defined, is called to swap out a RELA
376 void (*swap_reloca_out)
377 PARAMS ((bfd *, const Elf_Internal_Rela *, bfd_byte *));
381 #define elf_symbol_from(ABFD,S) \
382 (((S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \
383 && (S)->the_bfd->tdata.elf_obj_data != 0) \
384 ? (elf_symbol_type *) (S) \
387 enum elf_reloc_type_class {
389 reloc_class_relative,
394 struct elf_reloc_cookie
396 Elf_Internal_Rela *rels, *rel, *relend;
402 struct elf_link_hash_entry **sym_hashes;
406 struct elf_backend_data
408 /* The architecture for this backend. */
409 enum bfd_architecture arch;
411 /* The ELF machine code (EM_xxxx) for this backend. */
412 int elf_machine_code;
414 /* The maximum page size for this backend. */
417 /* A function to translate an ELF RELA relocation to a BFD arelent
419 void (*elf_info_to_howto)
420 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
422 /* A function to translate an ELF REL relocation to a BFD arelent
424 void (*elf_info_to_howto_rel)
425 PARAMS ((bfd *, arelent *, Elf_Internal_Rel *));
427 /* A function to determine whether a symbol is global when
428 partitioning the symbol table into local and global symbols.
429 This should be NULL for most targets, in which case the correct
430 thing will be done. MIPS ELF, at least on the Irix 5, has
431 special requirements. */
432 boolean (*elf_backend_sym_is_global)
433 PARAMS ((bfd *, asymbol *));
435 /* The remaining functions are hooks which are called only if they
438 /* A function to permit a backend specific check on whether a
439 particular BFD format is relevant for an object file, and to
440 permit the backend to set any global information it wishes. When
441 this is called elf_elfheader is set, but anything else should be
442 used with caution. If this returns false, the check_format
443 routine will return a bfd_error_wrong_format error. */
444 boolean (*elf_backend_object_p)
447 /* A function to do additional symbol processing when reading the
448 ELF symbol table. This is where any processor-specific special
449 section indices are handled. */
450 void (*elf_backend_symbol_processing)
451 PARAMS ((bfd *, asymbol *));
453 /* A function to do additional symbol processing after reading the
454 entire ELF symbol table. */
455 boolean (*elf_backend_symbol_table_processing)
456 PARAMS ((bfd *, elf_symbol_type *, unsigned int));
458 /* A function to set the type of the info field. Processor-specific
459 types should be handled here. */
460 int (*elf_backend_get_symbol_type)
461 PARAMS (( Elf_Internal_Sym *, int));
463 /* A function to do additional processing on the ELF section header
464 just before writing it out. This is used to set the flags and
465 type fields for some sections, or to actually write out data for
467 boolean (*elf_backend_section_processing)
468 PARAMS ((bfd *, Elf32_Internal_Shdr *));
470 /* A function to handle unusual section types when creating BFD
471 sections from ELF sections. */
472 boolean (*elf_backend_section_from_shdr)
473 PARAMS ((bfd *, Elf32_Internal_Shdr *, char *));
475 /* A function to convert machine dependent section header flags to
476 BFD internal section header flags. */
477 boolean (*elf_backend_section_flags)
478 PARAMS ((flagword *, Elf32_Internal_Shdr *));
480 /* A function to handle unusual program segment types when creating BFD
481 sections from ELF program segments. */
482 boolean (*elf_backend_section_from_phdr)
483 PARAMS ((bfd *, Elf32_Internal_Phdr *, int));
485 /* A function to set up the ELF section header for a BFD section in
486 preparation for writing it out. This is where the flags and type
487 fields are set for unusual sections. */
488 boolean (*elf_backend_fake_sections)
489 PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *));
491 /* A function to get the ELF section index for a BFD section. If
492 this returns true, the section was found. If it is a normal ELF
493 section, *RETVAL should be left unchanged. If it is not a normal
494 ELF section *RETVAL should be set to the SHN_xxxx index. */
495 boolean (*elf_backend_section_from_bfd_section)
496 PARAMS ((bfd *, asection *, int *retval));
498 /* If this field is not NULL, it is called by the add_symbols phase
499 of a link just before adding a symbol to the global linker hash
500 table. It may modify any of the fields as it wishes. If *NAME
501 is set to NULL, the symbol will be skipped rather than being
502 added to the hash table. This function is responsible for
503 handling all processor dependent symbol bindings and section
504 indices, and must set at least *FLAGS and *SEC for each processor
505 dependent case; failure to do so will cause a link error. */
506 boolean (*elf_add_symbol_hook)
507 PARAMS ((bfd *abfd, struct bfd_link_info *info,
508 const Elf_Internal_Sym *, const char **name,
509 flagword *flags, asection **sec, bfd_vma *value));
511 /* If this field is not NULL, it is called by the elf_link_output_sym
512 phase of a link for each symbol which will appear in the object file. */
513 boolean (*elf_backend_link_output_symbol_hook)
514 PARAMS ((bfd *, struct bfd_link_info *info, const char *,
515 Elf_Internal_Sym *, asection *));
517 /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend
518 linker the first time it encounters a dynamic object in the link.
519 This function must create any sections required for dynamic
520 linking. The ABFD argument is a dynamic object. The .interp,
521 .dynamic, .dynsym, .dynstr, and .hash functions have already been
522 created, and this function may modify the section flags if
523 desired. This function will normally create the .got and .plt
524 sections, but different backends have different requirements. */
525 boolean (*elf_backend_create_dynamic_sections)
526 PARAMS ((bfd *abfd, struct bfd_link_info *info));
528 /* The CHECK_RELOCS function is called by the add_symbols phase of
529 the ELF backend linker. It is called once for each section with
530 relocs of an object file, just after the symbols for the object
531 file have been added to the global linker hash table. The
532 function must look through the relocs and do any special handling
533 required. This generally means allocating space in the global
534 offset table, and perhaps allocating space for a reloc. The
535 relocs are always passed as Rela structures; if the section
536 actually uses Rel structures, the r_addend field will always be
538 boolean (*check_relocs)
539 PARAMS ((bfd *abfd, struct bfd_link_info *info, asection *o,
540 const Elf_Internal_Rela *relocs));
542 /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
543 linker for every symbol which is defined by a dynamic object and
544 referenced by a regular object. This is called after all the
545 input files have been seen, but before the SIZE_DYNAMIC_SECTIONS
546 function has been called. The hash table entry should be
547 bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be
548 defined in a section from a dynamic object. Dynamic object
549 sections are not included in the final link, and this function is
550 responsible for changing the value to something which the rest of
551 the link can deal with. This will normally involve adding an
552 entry to the .plt or .got or some such section, and setting the
553 symbol to point to that. */
554 boolean (*elf_backend_adjust_dynamic_symbol)
555 PARAMS ((struct bfd_link_info *info, struct elf_link_hash_entry *h));
557 /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker
558 after all the linker input files have been seen but before the
559 section sizes have been set. This is called after
560 ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS. */
561 boolean (*elf_backend_always_size_sections)
562 PARAMS ((bfd *output_bfd, struct bfd_link_info *info));
564 /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend
565 linker after all the linker input files have been seen but before
566 the sections sizes have been set. This is called after
567 ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols.
568 It is only called when linking against a dynamic object. It must
569 set the sizes of the dynamic sections, and may fill in their
570 contents as well. The generic ELF linker can handle the .dynsym,
571 .dynstr and .hash sections. This function must handle the
572 .interp section and any sections created by the
573 CREATE_DYNAMIC_SECTIONS entry point. */
574 boolean (*elf_backend_size_dynamic_sections)
575 PARAMS ((bfd *output_bfd, struct bfd_link_info *info));
577 /* The RELOCATE_SECTION function is called by the ELF backend linker
578 to handle the relocations for a section.
580 The relocs are always passed as Rela structures; if the section
581 actually uses Rel structures, the r_addend field will always be
584 This function is responsible for adjust the section contents as
585 necessary, and (if using Rela relocs and generating a
586 relocateable output file) adjusting the reloc addend as
589 This function does not have to worry about setting the reloc
590 address or the reloc symbol index.
592 LOCAL_SYMS is a pointer to the swapped in local symbols.
594 LOCAL_SECTIONS is an array giving the section in the input file
595 corresponding to the st_shndx field of each local symbol.
597 The global hash table entry for the global symbols can be found
598 via elf_sym_hashes (input_bfd).
600 When generating relocateable output, this function must handle
601 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
602 going to be the section symbol corresponding to the output
603 section, which means that the addend must be adjusted
605 boolean (*elf_backend_relocate_section)
606 PARAMS ((bfd *output_bfd, struct bfd_link_info *info,
607 bfd *input_bfd, asection *input_section, bfd_byte *contents,
608 Elf_Internal_Rela *relocs, Elf_Internal_Sym *local_syms,
609 asection **local_sections));
611 /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend
612 linker just before it writes a symbol out to the .dynsym section.
613 The processor backend may make any required adjustment to the
614 symbol. It may also take the opportunity to set contents of the
615 dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on
616 all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called
617 on those symbols which are defined by a dynamic object. */
618 boolean (*elf_backend_finish_dynamic_symbol)
619 PARAMS ((bfd *output_bfd, struct bfd_link_info *info,
620 struct elf_link_hash_entry *h, Elf_Internal_Sym *sym));
622 /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend
623 linker just before it writes all the dynamic sections out to the
624 output file. The FINISH_DYNAMIC_SYMBOL will have been called on
625 all dynamic symbols. */
626 boolean (*elf_backend_finish_dynamic_sections)
627 PARAMS ((bfd *output_bfd, struct bfd_link_info *info));
629 /* A function to do any beginning processing needed for the ELF file
630 before building the ELF headers and computing file positions. */
631 void (*elf_backend_begin_write_processing)
632 PARAMS ((bfd *, struct bfd_link_info *));
634 /* A function to do any final processing needed for the ELF file
635 before writing it out. The LINKER argument is true if this BFD
636 was created by the ELF backend linker. */
637 void (*elf_backend_final_write_processing)
638 PARAMS ((bfd *, boolean linker));
640 /* This function is called by get_program_header_size. It should
641 return the number of additional program segments which this BFD
642 will need. It should return -1 on error. */
643 int (*elf_backend_additional_program_headers)
646 /* This function is called to modify an existing segment map in a
647 backend specific fashion. */
648 boolean (*elf_backend_modify_segment_map)
651 /* This function is called during section gc to discover the section a
652 particular relocation refers to. It need not be defined for hosts
653 that have no queer relocation types. */
654 asection * (*gc_mark_hook)
655 PARAMS ((bfd *abfd, struct bfd_link_info *, Elf_Internal_Rela *,
656 struct elf_link_hash_entry *h, Elf_Internal_Sym *));
658 /* This function, if defined, is called during the sweep phase of gc
659 in order that a backend might update any data structures it might
661 boolean (*gc_sweep_hook)
662 PARAMS ((bfd *abfd, struct bfd_link_info *info, asection *o,
663 const Elf_Internal_Rela *relocs));
665 /* This function, if defined, is called after the ELF headers have
666 been created. This allows for things like the OS and ABI versions
668 void (*elf_backend_post_process_headers)
669 PARAMS ((bfd *, struct bfd_link_info *));
671 /* This function, if defined, prints a symbol to file and returns the
672 name of the symbol to be printed. It should return NULL to fall
673 back to default symbol printing. */
674 const char *(*elf_backend_print_symbol_all)
675 PARAMS ((bfd *, PTR, asymbol *));
677 /* This function, if defined, is called after all local symbols and
678 global symbols converted to locals are emited into the symtab
679 section. It allows the backend to emit special global symbols
680 not handled in the hash table. */
681 boolean (*elf_backend_output_arch_syms)
682 PARAMS ((bfd *, struct bfd_link_info *, PTR,
683 boolean (*) (PTR, const char *, Elf_Internal_Sym *, asection *)));
685 /* Copy any information related to dynamic linking from a pre-existing
686 symbol to a newly created symbol. Also called to copy flags and
687 other back-end info to a weakdef, in which case the symbol is not
688 newly created and plt/got refcounts and dynamic indices should not
690 void (*elf_backend_copy_indirect_symbol)
691 PARAMS ((struct elf_link_hash_entry *, struct elf_link_hash_entry *));
693 /* Modify any information related to dynamic linking such that the
694 symbol is not exported. */
695 void (*elf_backend_hide_symbol)
696 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, boolean));
698 /* Emit relocations. Overrides default routine for emitting relocs,
699 except during a relocatable link, or if all relocs are being emitted. */
700 void (*elf_backend_emit_relocs)
701 PARAMS ((bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *));
703 /* Count relocations. Not called for relocatable links
704 or if all relocs are being preserved in the output. */
705 unsigned int (*elf_backend_count_relocs)
706 PARAMS ((asection *, Elf_Internal_Rela *));
708 /* This function, if defined, is called when an NT_PRSTATUS note is found
710 boolean (*elf_backend_grok_prstatus)
711 PARAMS ((bfd *, Elf_Internal_Note *));
713 /* This function, if defined, is called when an NT_PSINFO or NT_PRPSINFO
714 note is found in a core file. */
715 boolean (*elf_backend_grok_psinfo)
716 PARAMS ((bfd *, Elf_Internal_Note *));
718 /* Functions to print VMAs. Special code to handle 64 bit ELF files. */
719 void (* elf_backend_sprintf_vma)
720 PARAMS ((bfd *, char *, bfd_vma));
721 void (* elf_backend_fprintf_vma)
722 PARAMS ((bfd *, PTR, bfd_vma));
724 /* This function returns class of a reloc type. */
725 enum elf_reloc_type_class (*elf_backend_reloc_type_class)
726 PARAMS ((const Elf_Internal_Rela *));
728 /* This function, if defined, removes information about discarded functions
729 from other sections which mention them. */
730 boolean (*elf_backend_discard_info)
731 PARAMS ((bfd *, struct elf_reloc_cookie *, struct bfd_link_info *));
733 /* This function, if defined, signals that the function above has removed
734 the discarded relocations for this section. */
735 boolean (*elf_backend_ignore_discarded_relocs)
736 PARAMS ((asection *));
738 /* This function, if defined, may write out the given section.
739 Returns true if it did so and false if the caller should. */
740 boolean (*elf_backend_write_section)
741 PARAMS ((bfd *, asection *, bfd_byte *));
743 /* The swapping table to use when dealing with ECOFF information.
744 Used for the MIPS ELF .mdebug section. */
745 const struct ecoff_debug_swap *elf_backend_ecoff_debug_swap;
747 /* Alternate EM_xxxx machine codes for this backend. */
748 int elf_machine_alt1;
749 int elf_machine_alt2;
751 const struct elf_size_info *s;
753 /* offset of the _GLOBAL_OFFSET_TABLE_ symbol from the start of the
755 bfd_vma got_symbol_offset;
757 /* The size in bytes of the headers for the GOT and PLT. This includes
758 the so-called reserved entries on some systems. */
759 bfd_vma got_header_size;
760 bfd_vma plt_header_size;
762 /* This is true if the linker should act like collect and gather
763 global constructors and destructors by name. This is true for
764 MIPS ELF because the Irix 5 tools can not handle the .init
766 unsigned collect : 1;
768 /* This is true if the linker should ignore changes to the type of a
769 symbol. This is true for MIPS ELF because some Irix 5 objects
770 record undefined functions as STT_OBJECT although the definitions
772 unsigned type_change_ok : 1;
774 /* Whether the backend may use REL relocations. (Some backends use
775 both REL and RELA relocations, and this flag is set for those
777 unsigned may_use_rel_p : 1;
779 /* Whether the backend may use RELA relocations. (Some backends use
780 both REL and RELA relocations, and this flag is set for those
782 unsigned may_use_rela_p : 1;
784 /* Whether the default relocation type is RELA. If a backend with
785 this flag set wants REL relocations for a particular section,
786 it must note that explicitly. Similarly, if this flag is clear,
787 and the backend wants RELA relocations for a particular
789 unsigned default_use_rela_p : 1;
791 /* Set if RELA relocations for a relocatable link can be handled by
792 generic code. Backends that set this flag need do nothing in the
793 backend relocate_section routine for relocatable linking. */
794 unsigned rela_normal : 1;
796 /* True if addresses "naturally" sign extend. This is used when
797 swapping in from Elf32 when BFD64. */
798 unsigned sign_extend_vma : 1;
800 unsigned want_got_plt : 1;
801 unsigned plt_readonly : 1;
802 unsigned want_plt_sym : 1;
803 unsigned plt_not_loaded : 1;
804 unsigned plt_alignment : 4;
805 unsigned can_gc_sections : 1;
806 unsigned can_refcount : 1;
807 unsigned want_got_sym : 1;
808 unsigned want_dynbss : 1;
811 /* Information stored for each BFD section in an ELF file. This
812 structure is allocated by elf_new_section_hook. */
814 struct bfd_elf_section_data
816 /* The ELF header for this section. */
817 Elf_Internal_Shdr this_hdr;
819 /* The ELF header for the reloc section associated with this
821 Elf_Internal_Shdr rel_hdr;
823 /* If there is a second reloc section associated with this section,
824 as can happen on Irix 6, this field points to the header. */
825 Elf_Internal_Shdr *rel_hdr2;
827 /* The number of relocations currently assigned to REL_HDR. */
828 unsigned int rel_count;
830 /* The number of relocations currently assigned to REL_HDR2. */
831 unsigned int rel_count2;
833 /* A pointer to a linked list tracking dynamic relocs copied for
837 /* A pointer to the bfd section used for dynamic relocs. */
840 /* The ELF section number of this section. Only used for an output
844 /* The ELF section number of the reloc section indicated by
845 REL_HDR if any. Only used for an output file. */
848 /* The ELF section number of the reloc section indicated by
849 REL_HDR2 if any. Only used for an output file. */
852 /* Used by the backend linker to store the symbol hash table entries
853 associated with relocs against global symbols. */
854 struct elf_link_hash_entry **rel_hashes;
856 /* A pointer to the swapped relocs. If the section uses REL relocs,
857 rather than RELA, all the r_addend fields will be zero. This
858 pointer may be NULL. It is used by the backend linker. */
859 Elf_Internal_Rela *relocs;
861 /* Used by the backend linker when generating a shared library to
862 record the dynamic symbol index for a section symbol
863 corresponding to this section. A value of 0 means that there is
864 no dynamic symbol for this section. */
867 /* A pointer used for various section optimizations. */
870 /* Type of that information. */
871 enum elf_link_info_type sec_info_type;
873 /* Group name, if this section is part of a group. */
874 const char *group_name;
876 /* A linked list of sections in the group. Circular when used by
878 asection *next_in_group;
880 /* A pointer available for the processor specific ELF backend. */
883 /* Nonzero if this section uses RELA relocations, rather than REL. */
884 unsigned int use_rela_p:1;
887 #define elf_section_data(sec) ((struct bfd_elf_section_data*)sec->used_by_bfd)
888 #define elf_group_name(sec) (elf_section_data(sec)->group_name)
889 #define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group)
891 /* Return true if section has been discarded. */
892 #define elf_discarded_section(sec) \
893 (!bfd_is_abs_section(sec) \
894 && bfd_is_abs_section((sec)->output_section) \
895 && elf_section_data (sec)->sec_info_type != ELF_INFO_TYPE_MERGE)
897 #define get_elf_backend_data(abfd) \
898 ((struct elf_backend_data *) (abfd)->xvec->backend_data)
900 /* Enumeration to specify the special section. */
901 typedef enum elf_linker_section_enum
903 LINKER_SECTION_UNKNOWN, /* not used */
904 LINKER_SECTION_GOT, /* .got section for global offset pointers */
905 LINKER_SECTION_PLT, /* .plt section for generated procedure stubs */
906 LINKER_SECTION_SDATA, /* .sdata/.sbss section for PowerPC */
907 LINKER_SECTION_SDATA2, /* .sdata2/.sbss2 section for PowerPC */
908 LINKER_SECTION_MAX /* # of linker sections */
909 } elf_linker_section_enum_t;
911 /* Sections created by the linker. */
913 typedef struct elf_linker_section
915 char *name; /* name of the section */
916 char *rel_name; /* name of the associated .rel{,a}. section */
917 char *bss_name; /* name of a related .bss section */
918 char *sym_name; /* name of symbol to reference this section */
919 asection *section; /* pointer to the section */
920 asection *bss_section; /* pointer to the bss section associated with this */
921 asection *rel_section; /* pointer to the relocations needed for this section */
922 struct elf_link_hash_entry *sym_hash; /* pointer to the created symbol hash value */
923 bfd_vma initial_size; /* initial size before any linker generated allocations */
924 bfd_vma sym_offset; /* offset of symbol from beginning of section */
925 bfd_vma hole_size; /* size of reserved address hole in allocation */
926 bfd_vma hole_offset; /* current offset for the hole */
927 bfd_vma max_hole_offset; /* maximum offset for the hole */
928 elf_linker_section_enum_t which; /* which section this is */
929 boolean hole_written_p; /* whether the hole has been initialized */
930 unsigned int alignment; /* alignment for the section */
931 flagword flags; /* flags to use to create the section */
932 } elf_linker_section_t;
934 /* Linked list of allocated pointer entries. This hangs off of the symbol lists, and
935 provides allows us to return different pointers, based on different addend's. */
937 typedef struct elf_linker_section_pointers
939 struct elf_linker_section_pointers *next; /* next allocated pointer for this symbol */
940 bfd_vma offset; /* offset of pointer from beginning of section */
941 bfd_vma addend; /* addend used */
942 elf_linker_section_enum_t which; /* which linker section this is */
943 boolean written_address_p; /* whether address was written yet */
944 } elf_linker_section_pointers_t;
946 /* Some private data is stashed away for future use using the tdata pointer
947 in the bfd structure. */
951 Elf_Internal_Ehdr elf_header[1]; /* Actual data, but ref like ptr */
952 Elf_Internal_Shdr **elf_sect_ptr;
953 Elf_Internal_Phdr *phdr;
954 struct elf_segment_map *segment_map;
955 struct elf_strtab_hash *strtab_ptr;
958 unsigned int num_elf_sections; /* elf_sect_ptr size */
959 int num_section_syms;
960 asymbol **section_syms; /* STT_SECTION symbols for each section */
961 Elf_Internal_Shdr symtab_hdr;
962 Elf_Internal_Shdr shstrtab_hdr;
963 Elf_Internal_Shdr strtab_hdr;
964 Elf_Internal_Shdr dynsymtab_hdr;
965 Elf_Internal_Shdr dynstrtab_hdr;
966 Elf_Internal_Shdr dynversym_hdr;
967 Elf_Internal_Shdr dynverref_hdr;
968 Elf_Internal_Shdr dynverdef_hdr;
969 Elf_Internal_Shdr symtab_shndx_hdr;
970 unsigned int symtab_section, shstrtab_section;
971 unsigned int strtab_section, dynsymtab_section;
972 unsigned int symtab_shndx_section;
973 unsigned int dynversym_section, dynverdef_section, dynverref_section;
974 file_ptr next_file_pos;
976 /* we don't need these inside bfd anymore, and I think
977 these weren't used outside bfd. */
978 void *prstatus; /* The raw /proc prstatus structure */
979 void *prpsinfo; /* The raw /proc prpsinfo structure */
981 bfd_vma gp; /* The gp value */
982 unsigned int gp_size; /* The gp size */
984 Elf_Internal_Shdr **group_sect_ptr;
987 /* Information grabbed from an elf core file. */
994 /* This is set to true if the object was created by the backend
998 /* A mapping from external symbols to entries in the linker hash
999 table, used when linking. This is indexed by the symbol index
1000 minus the sh_info field of the symbol table header. */
1001 struct elf_link_hash_entry **sym_hashes;
1003 /* A mapping from local symbols to offsets into the global offset
1004 table, used when linking. This is indexed by the symbol index.
1005 Like for the globals, we use a union and two names primarily to
1006 document the intent of any particular piece of code. The field
1007 should be used as a count until size_dynamic_sections, at which
1008 point the contents of the .got is fixed. Afterward, if an entry
1009 is -1, then the symbol does not require a global offset table entry. */
1012 bfd_signed_vma *refcounts;
1016 /* A mapping from local symbols to offsets into the various linker
1017 sections added. This is index by the symbol index. */
1018 elf_linker_section_pointers_t **linker_section_pointers;
1020 /* The linker ELF emulation code needs to let the backend ELF linker
1021 know what filename should be used for a dynamic object if the
1022 dynamic object is found using a search. The emulation code then
1023 sometimes needs to know what name was actually used. Until the
1024 file has been added to the linker symbol table, this field holds
1025 the name the linker wants. After it has been added, it holds the
1026 name actually used, which will be the DT_SONAME entry if there is
1028 const char *dt_name;
1030 /* When a reference in a regular object is resolved by a shared
1031 object is loaded into via the DT_NEEDED entries by the linker
1032 ELF emulation code, we need to add the shared object to the
1033 DT_NEEDED list of the resulting binary to indicate the dependency
1034 as if the -l option is passed to the linker. This field holds the
1035 name of the loaded shared object. */
1036 const char *dt_soname;
1038 /* Irix 5 often screws up the symbol table, sorting local symbols
1039 after global symbols. This flag is set if the symbol table in
1040 this BFD appears to be screwed up. If it is, we ignore the
1041 sh_info field in the symbol table header, and always read all the
1045 /* Records the result of `get_program_header_size'. */
1046 bfd_size_type program_header_size;
1048 /* Used by find_nearest_line entry point. */
1051 /* Used by MIPS ELF find_nearest_line entry point. The structure
1052 could be included directly in this one, but there's no point to
1053 wasting the memory just for the infrequently called
1054 find_nearest_line. */
1055 struct mips_elf_find_line *find_line_info;
1057 /* A place to stash dwarf1 info for this bfd. */
1058 struct dwarf1_debug *dwarf1_find_line_info;
1060 /* A place to stash dwarf2 info for this bfd. */
1061 PTR dwarf2_find_line_info;
1063 /* An array of stub sections indexed by symbol number, used by the
1064 MIPS ELF linker. FIXME: We should figure out some way to only
1065 include this field for a MIPS ELF target. */
1066 asection **local_stubs;
1068 /* Used to determine if the e_flags field has been initialized */
1071 /* Used to determine if PT_GNU_EH_FRAME segment header should be
1073 boolean eh_frame_hdr;
1075 /* Number of symbol version definitions we are about to emit. */
1076 unsigned int cverdefs;
1078 /* Number of symbol version references we are about to emit. */
1079 unsigned int cverrefs;
1081 /* Symbol version definitions in external objects. */
1082 Elf_Internal_Verdef *verdef;
1084 /* Symbol version references to external objects. */
1085 Elf_Internal_Verneed *verref;
1087 /* Linker sections that we are interested in. */
1088 struct elf_linker_section *linker_section[ (int)LINKER_SECTION_MAX ];
1090 /* The Irix 5 support uses two virtual sections, which represent
1091 text/data symbols defined in dynamic objects. */
1092 asymbol *elf_data_symbol;
1093 asymbol *elf_text_symbol;
1094 asection *elf_data_section;
1095 asection *elf_text_section;
1098 #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
1099 #define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header)
1100 #define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr)
1101 #define elf_numsections(bfd) (elf_tdata(bfd) -> num_elf_sections)
1102 #define elf_shstrtab(bfd) (elf_tdata(bfd) -> strtab_ptr)
1103 #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section)
1104 #define elf_symtab_shndx(bfd) (elf_tdata(bfd) -> symtab_shndx_section)
1105 #define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section)
1106 #define elf_dynversym(bfd) (elf_tdata(bfd) -> dynversym_section)
1107 #define elf_dynverdef(bfd) (elf_tdata(bfd) -> dynverdef_section)
1108 #define elf_dynverref(bfd) (elf_tdata(bfd) -> dynverref_section)
1109 #define elf_num_locals(bfd) (elf_tdata(bfd) -> num_locals)
1110 #define elf_num_globals(bfd) (elf_tdata(bfd) -> num_globals)
1111 #define elf_section_syms(bfd) (elf_tdata(bfd) -> section_syms)
1112 #define elf_num_section_syms(bfd) (elf_tdata(bfd) -> num_section_syms)
1113 #define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
1114 #define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
1115 #define elf_gp(bfd) (elf_tdata(bfd) -> gp)
1116 #define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size)
1117 #define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes)
1118 #define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts)
1119 #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets)
1120 #define elf_local_ptr_offsets(bfd) (elf_tdata(bfd) -> linker_section_pointers)
1121 #define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name)
1122 #define elf_dt_soname(bfd) (elf_tdata(bfd) -> dt_soname)
1123 #define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab)
1124 #define elf_flags_init(bfd) (elf_tdata(bfd) -> flags_init)
1125 #define elf_linker_section(bfd,n) (elf_tdata(bfd) -> linker_section[(int)n])
1127 extern void _bfd_elf_swap_verdef_in
1128 PARAMS ((bfd *, const Elf_External_Verdef *, Elf_Internal_Verdef *));
1129 extern void _bfd_elf_swap_verdef_out
1130 PARAMS ((bfd *, const Elf_Internal_Verdef *, Elf_External_Verdef *));
1131 extern void _bfd_elf_swap_verdaux_in
1132 PARAMS ((bfd *, const Elf_External_Verdaux *, Elf_Internal_Verdaux *));
1133 extern void _bfd_elf_swap_verdaux_out
1134 PARAMS ((bfd *, const Elf_Internal_Verdaux *, Elf_External_Verdaux *));
1135 extern void _bfd_elf_swap_verneed_in
1136 PARAMS ((bfd *, const Elf_External_Verneed *, Elf_Internal_Verneed *));
1137 extern void _bfd_elf_swap_verneed_out
1138 PARAMS ((bfd *, const Elf_Internal_Verneed *, Elf_External_Verneed *));
1139 extern void _bfd_elf_swap_vernaux_in
1140 PARAMS ((bfd *, const Elf_External_Vernaux *, Elf_Internal_Vernaux *));
1141 extern void _bfd_elf_swap_vernaux_out
1142 PARAMS ((bfd *, const Elf_Internal_Vernaux *, Elf_External_Vernaux *));
1143 extern void _bfd_elf_swap_versym_in
1144 PARAMS ((bfd *, const Elf_External_Versym *, Elf_Internal_Versym *));
1145 extern void _bfd_elf_swap_versym_out
1146 PARAMS ((bfd *, const Elf_Internal_Versym *, Elf_External_Versym *));
1148 extern int _bfd_elf_section_from_bfd_section
1149 PARAMS ((bfd *, asection *));
1150 extern char *bfd_elf_string_from_elf_section
1151 PARAMS ((bfd *, unsigned, unsigned));
1152 extern char *bfd_elf_get_str_section
1153 PARAMS ((bfd *, unsigned));
1155 extern boolean _bfd_elf_copy_private_bfd_data
1156 PARAMS ((bfd *, bfd *));
1157 extern boolean _bfd_elf_print_private_bfd_data
1158 PARAMS ((bfd *, PTR));
1159 extern void bfd_elf_print_symbol
1160 PARAMS ((bfd *, PTR, asymbol *, bfd_print_symbol_type));
1162 #define elf_string_from_elf_strtab(abfd, strindex) \
1163 bfd_elf_string_from_elf_section(abfd, elf_elfheader(abfd)->e_shstrndx, \
1166 #define bfd_elf32_print_symbol bfd_elf_print_symbol
1167 #define bfd_elf64_print_symbol bfd_elf_print_symbol
1169 extern void _bfd_elf_sprintf_vma
1170 PARAMS ((bfd *, char *, bfd_vma));
1171 extern void _bfd_elf_fprintf_vma
1172 PARAMS ((bfd *, PTR, bfd_vma));
1174 extern enum elf_reloc_type_class _bfd_elf_reloc_type_class
1175 PARAMS ((const Elf_Internal_Rela *));
1176 extern bfd_vma _bfd_elf_rela_local_sym
1177 PARAMS ((bfd *, Elf_Internal_Sym *, asection *, Elf_Internal_Rela *));
1178 extern bfd_vma _bfd_elf_rel_local_sym
1179 PARAMS ((bfd *, Elf_Internal_Sym *, asection **, bfd_vma));
1180 extern bfd_vma _bfd_elf_section_offset
1181 PARAMS ((bfd *, struct bfd_link_info *, asection *, bfd_vma));
1183 extern unsigned long bfd_elf_hash
1184 PARAMS ((const char *));
1186 extern bfd_reloc_status_type bfd_elf_generic_reloc
1187 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
1188 extern boolean bfd_elf_mkobject
1190 extern boolean bfd_elf_mkcorefile
1192 extern Elf_Internal_Shdr *bfd_elf_find_section
1193 PARAMS ((bfd *, char *));
1194 extern boolean _bfd_elf_make_section_from_shdr
1195 PARAMS ((bfd *, Elf_Internal_Shdr *, const char *));
1196 extern boolean _bfd_elf_make_section_from_phdr
1197 PARAMS ((bfd *, Elf_Internal_Phdr *, int, const char *));
1198 extern struct bfd_hash_entry *_bfd_elf_link_hash_newfunc
1199 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
1200 extern struct bfd_link_hash_table *_bfd_elf_link_hash_table_create
1202 extern void _bfd_elf_link_hash_copy_indirect
1203 PARAMS ((struct elf_link_hash_entry *, struct elf_link_hash_entry *));
1204 extern void _bfd_elf_link_hash_hide_symbol
1205 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, boolean));
1206 extern boolean _bfd_elf_link_hash_table_init
1207 PARAMS ((struct elf_link_hash_table *, bfd *,
1208 struct bfd_hash_entry *(*) (struct bfd_hash_entry *,
1209 struct bfd_hash_table *,
1211 extern boolean _bfd_elf_slurp_version_tables
1214 extern boolean _bfd_elf_merge_sections
1215 PARAMS ((bfd *, struct bfd_link_info *));
1217 extern boolean _bfd_elf_copy_private_symbol_data
1218 PARAMS ((bfd *, asymbol *, bfd *, asymbol *));
1219 extern boolean _bfd_elf_copy_private_section_data
1220 PARAMS ((bfd *, asection *, bfd *, asection *));
1221 extern boolean _bfd_elf_write_object_contents
1223 extern boolean _bfd_elf_write_corefile_contents
1225 extern boolean _bfd_elf_set_section_contents
1226 PARAMS ((bfd *, sec_ptr, PTR, file_ptr, bfd_size_type));
1227 extern long _bfd_elf_get_symtab_upper_bound
1229 extern long _bfd_elf_get_symtab
1230 PARAMS ((bfd *, asymbol **));
1231 extern long _bfd_elf_get_dynamic_symtab_upper_bound
1233 extern long _bfd_elf_canonicalize_dynamic_symtab
1234 PARAMS ((bfd *, asymbol **));
1235 extern long _bfd_elf_get_reloc_upper_bound
1236 PARAMS ((bfd *, sec_ptr));
1237 extern long _bfd_elf_canonicalize_reloc
1238 PARAMS ((bfd *, sec_ptr, arelent **, asymbol **));
1239 extern long _bfd_elf_get_dynamic_reloc_upper_bound
1241 extern long _bfd_elf_canonicalize_dynamic_reloc
1242 PARAMS ((bfd *, arelent **, asymbol **));
1243 extern asymbol *_bfd_elf_make_empty_symbol
1245 extern void _bfd_elf_get_symbol_info
1246 PARAMS ((bfd *, asymbol *, symbol_info *));
1247 extern boolean _bfd_elf_is_local_label_name
1248 PARAMS ((bfd *, const char *));
1249 extern alent *_bfd_elf_get_lineno
1250 PARAMS ((bfd *, asymbol *));
1251 extern boolean _bfd_elf_set_arch_mach
1252 PARAMS ((bfd *, enum bfd_architecture, unsigned long));
1253 extern boolean _bfd_elf_find_nearest_line
1254 PARAMS ((bfd *, asection *, asymbol **, bfd_vma, const char **,
1255 const char **, unsigned int *));
1256 #define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols
1257 #define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
1258 extern int _bfd_elf_sizeof_headers
1259 PARAMS ((bfd *, boolean));
1260 extern boolean _bfd_elf_new_section_hook
1261 PARAMS ((bfd *, asection *));
1262 extern boolean _bfd_elf_init_reloc_shdr
1263 PARAMS ((bfd *, Elf_Internal_Shdr *, asection *, boolean));
1265 /* If the target doesn't have reloc handling written yet: */
1266 extern void _bfd_elf_no_info_to_howto
1267 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
1269 extern boolean bfd_section_from_shdr
1270 PARAMS ((bfd *, unsigned int shindex));
1271 extern boolean bfd_section_from_phdr
1272 PARAMS ((bfd *, Elf_Internal_Phdr *, int));
1274 extern int _bfd_elf_symbol_from_bfd_symbol
1275 PARAMS ((bfd *, asymbol **));
1277 extern asection *bfd_section_from_r_symndx
1278 PARAMS ((bfd *, struct sym_sec_cache *, asection *, unsigned long));
1279 extern asection *bfd_section_from_elf_index
1280 PARAMS ((bfd *, unsigned int));
1281 extern boolean _bfd_elf_create_dynamic_sections
1282 PARAMS ((bfd *, struct bfd_link_info *));
1283 extern struct bfd_strtab_hash *_bfd_elf_stringtab_init
1286 extern struct elf_strtab_hash * _bfd_elf_strtab_init
1288 extern void _bfd_elf_strtab_free
1289 PARAMS ((struct elf_strtab_hash *));
1290 extern bfd_size_type _bfd_elf_strtab_add
1291 PARAMS ((struct elf_strtab_hash *, const char *, boolean));
1292 extern void _bfd_elf_strtab_addref
1293 PARAMS ((struct elf_strtab_hash *, bfd_size_type));
1294 extern void _bfd_elf_strtab_delref
1295 PARAMS ((struct elf_strtab_hash *, bfd_size_type));
1296 extern void _bfd_elf_strtab_clear_all_refs
1297 PARAMS ((struct elf_strtab_hash *));
1298 extern bfd_size_type _bfd_elf_strtab_size
1299 PARAMS ((struct elf_strtab_hash *));
1300 extern bfd_size_type _bfd_elf_strtab_offset
1301 PARAMS ((struct elf_strtab_hash *, bfd_size_type));
1302 extern boolean _bfd_elf_strtab_emit
1303 PARAMS ((bfd *, struct elf_strtab_hash *));
1304 extern void _bfd_elf_strtab_finalize
1305 PARAMS ((struct elf_strtab_hash *));
1307 extern boolean _bfd_elf_discard_section_eh_frame
1308 PARAMS ((bfd *, struct bfd_link_info *, asection *, asection *,
1309 boolean (*) (bfd_vma, PTR), struct elf_reloc_cookie *));
1310 extern boolean _bfd_elf_discard_section_eh_frame_hdr
1311 PARAMS ((bfd *, struct bfd_link_info *, asection *));
1312 extern bfd_vma _bfd_elf_eh_frame_section_offset
1313 PARAMS ((bfd *, asection *, bfd_vma));
1314 extern boolean _bfd_elf_write_section_eh_frame
1315 PARAMS ((bfd *, asection *, asection *, bfd_byte *));
1316 extern boolean _bfd_elf_write_section_eh_frame_hdr
1317 PARAMS ((bfd *, asection *));
1318 extern boolean _bfd_elf_maybe_strip_eh_frame_hdr
1319 PARAMS ((struct bfd_link_info *));
1321 extern boolean _bfd_elf_link_record_dynamic_symbol
1322 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
1323 extern long _bfd_elf_link_lookup_local_dynindx
1324 PARAMS ((struct bfd_link_info *, bfd *, long));
1325 extern boolean _bfd_elf_compute_section_file_positions
1326 PARAMS ((bfd *, struct bfd_link_info *));
1327 extern void _bfd_elf_assign_file_positions_for_relocs
1329 extern file_ptr _bfd_elf_assign_file_position_for_section
1330 PARAMS ((Elf_Internal_Shdr *, file_ptr, boolean));
1332 extern boolean _bfd_elf_validate_reloc
1333 PARAMS ((bfd *, arelent *));
1335 extern boolean _bfd_elf_create_dynamic_sections
1336 PARAMS ((bfd *, struct bfd_link_info *));
1337 extern boolean _bfd_elf_create_got_section
1338 PARAMS ((bfd *, struct bfd_link_info *));
1339 extern unsigned long _bfd_elf_link_renumber_dynsyms
1340 PARAMS ((bfd *, struct bfd_link_info *));
1342 extern boolean _bfd_elfcore_make_pseudosection
1343 PARAMS ((bfd *, char *, size_t, ufile_ptr));
1344 extern char *_bfd_elfcore_strndup
1345 PARAMS ((bfd *, char *, size_t));
1347 extern elf_linker_section_t *_bfd_elf_create_linker_section
1348 PARAMS ((bfd *, struct bfd_link_info *, enum elf_linker_section_enum,
1349 elf_linker_section_t *));
1351 extern elf_linker_section_pointers_t *_bfd_elf_find_pointer_linker_section
1352 PARAMS ((elf_linker_section_pointers_t *, bfd_vma,
1353 elf_linker_section_enum_t));
1355 extern boolean bfd_elf32_create_pointer_linker_section
1356 PARAMS ((bfd *, struct bfd_link_info *, elf_linker_section_t *,
1357 struct elf_link_hash_entry *, const Elf32_Internal_Rela *));
1359 extern bfd_vma bfd_elf32_finish_pointer_linker_section
1360 PARAMS ((bfd *, bfd *, struct bfd_link_info *, elf_linker_section_t *,
1361 struct elf_link_hash_entry *, bfd_vma,
1362 const Elf32_Internal_Rela *, int));
1364 extern boolean bfd_elf64_create_pointer_linker_section
1365 PARAMS ((bfd *, struct bfd_link_info *, elf_linker_section_t *,
1366 struct elf_link_hash_entry *, const Elf64_Internal_Rela *));
1368 extern bfd_vma bfd_elf64_finish_pointer_linker_section
1369 PARAMS ((bfd *, bfd *, struct bfd_link_info *, elf_linker_section_t *,
1370 struct elf_link_hash_entry *, bfd_vma,
1371 const Elf64_Internal_Rela *, int));
1373 extern boolean _bfd_elf_make_linker_section_rela
1374 PARAMS ((bfd *, elf_linker_section_t *, int));
1376 extern const bfd_target *bfd_elf32_object_p
1378 extern const bfd_target *bfd_elf32_core_file_p
1380 extern char *bfd_elf32_core_file_failing_command
1382 extern int bfd_elf32_core_file_failing_signal
1384 extern boolean bfd_elf32_core_file_matches_executable_p
1385 PARAMS ((bfd *, bfd *));
1387 extern boolean bfd_elf32_bfd_link_add_symbols
1388 PARAMS ((bfd *, struct bfd_link_info *));
1389 extern boolean bfd_elf32_bfd_final_link
1390 PARAMS ((bfd *, struct bfd_link_info *));
1392 extern void bfd_elf32_swap_symbol_in
1393 PARAMS ((bfd *, const Elf32_External_Sym *, const Elf_External_Sym_Shndx *,
1394 Elf_Internal_Sym *));
1395 extern void bfd_elf32_swap_symbol_out
1396 PARAMS ((bfd *, const Elf_Internal_Sym *, PTR, PTR));
1397 extern void bfd_elf32_swap_reloc_in
1398 PARAMS ((bfd *, const Elf32_External_Rel *, Elf_Internal_Rel *));
1399 extern void bfd_elf32_swap_reloc_out
1400 PARAMS ((bfd *, const Elf_Internal_Rel *, Elf32_External_Rel *));
1401 extern void bfd_elf32_swap_reloca_in
1402 PARAMS ((bfd *, const Elf32_External_Rela *, Elf_Internal_Rela *));
1403 extern void bfd_elf32_swap_reloca_out
1404 PARAMS ((bfd *, const Elf_Internal_Rela *, Elf32_External_Rela *));
1405 extern void bfd_elf32_swap_phdr_in
1406 PARAMS ((bfd *, const Elf32_External_Phdr *, Elf_Internal_Phdr *));
1407 extern void bfd_elf32_swap_phdr_out
1408 PARAMS ((bfd *, const Elf_Internal_Phdr *, Elf32_External_Phdr *));
1409 extern void bfd_elf32_swap_dyn_in
1410 PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *));
1411 extern void bfd_elf32_swap_dyn_out
1412 PARAMS ((bfd *, const Elf_Internal_Dyn *, PTR));
1413 extern long bfd_elf32_slurp_symbol_table
1414 PARAMS ((bfd *, asymbol **, boolean));
1415 extern boolean bfd_elf32_write_shdrs_and_ehdr
1417 extern int bfd_elf32_write_out_phdrs
1418 PARAMS ((bfd *, const Elf_Internal_Phdr *, unsigned int));
1419 extern void bfd_elf32_write_relocs
1420 PARAMS ((bfd *, asection *, PTR));
1421 extern boolean bfd_elf32_slurp_reloc_table
1422 PARAMS ((bfd *, asection *, asymbol **, boolean));
1423 extern boolean bfd_elf32_add_dynamic_entry
1424 PARAMS ((struct bfd_link_info *, bfd_vma, bfd_vma));
1425 extern boolean bfd_elf32_link_create_dynamic_sections
1426 PARAMS ((bfd *, struct bfd_link_info *));
1427 extern Elf_Internal_Rela *_bfd_elf32_link_read_relocs
1428 PARAMS ((bfd *, asection *, PTR, Elf_Internal_Rela *, boolean));
1430 extern const bfd_target *bfd_elf64_object_p
1432 extern const bfd_target *bfd_elf64_core_file_p
1434 extern char *bfd_elf64_core_file_failing_command
1436 extern int bfd_elf64_core_file_failing_signal
1438 extern boolean bfd_elf64_core_file_matches_executable_p
1439 PARAMS ((bfd *, bfd *));
1440 extern boolean bfd_elf64_bfd_link_add_symbols
1441 PARAMS ((bfd *, struct bfd_link_info *));
1442 extern boolean bfd_elf64_bfd_final_link
1443 PARAMS ((bfd *, struct bfd_link_info *));
1445 extern void bfd_elf64_swap_symbol_in
1446 PARAMS ((bfd *, const Elf64_External_Sym *, const Elf_External_Sym_Shndx *,
1447 Elf_Internal_Sym *));
1448 extern void bfd_elf64_swap_symbol_out
1449 PARAMS ((bfd *, const Elf_Internal_Sym *, PTR, PTR));
1450 extern void bfd_elf64_swap_reloc_in
1451 PARAMS ((bfd *, const Elf64_External_Rel *, Elf_Internal_Rel *));
1452 extern void bfd_elf64_swap_reloc_out
1453 PARAMS ((bfd *, const Elf_Internal_Rel *, Elf64_External_Rel *));
1454 extern void bfd_elf64_swap_reloca_in
1455 PARAMS ((bfd *, const Elf64_External_Rela *, Elf_Internal_Rela *));
1456 extern void bfd_elf64_swap_reloca_out
1457 PARAMS ((bfd *, const Elf_Internal_Rela *, Elf64_External_Rela *));
1458 extern void bfd_elf64_swap_phdr_in
1459 PARAMS ((bfd *, const Elf64_External_Phdr *, Elf_Internal_Phdr *));
1460 extern void bfd_elf64_swap_phdr_out
1461 PARAMS ((bfd *, const Elf_Internal_Phdr *, Elf64_External_Phdr *));
1462 extern void bfd_elf64_swap_dyn_in
1463 PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *));
1464 extern void bfd_elf64_swap_dyn_out
1465 PARAMS ((bfd *, const Elf_Internal_Dyn *, PTR));
1466 extern long bfd_elf64_slurp_symbol_table
1467 PARAMS ((bfd *, asymbol **, boolean));
1468 extern boolean bfd_elf64_write_shdrs_and_ehdr
1470 extern int bfd_elf64_write_out_phdrs
1471 PARAMS ((bfd *, const Elf_Internal_Phdr *, unsigned int));
1472 extern void bfd_elf64_write_relocs
1473 PARAMS ((bfd *, asection *, PTR));
1474 extern boolean bfd_elf64_slurp_reloc_table
1475 PARAMS ((bfd *, asection *, asymbol **, boolean));
1476 extern boolean bfd_elf64_add_dynamic_entry
1477 PARAMS ((struct bfd_link_info *, bfd_vma, bfd_vma));
1478 extern boolean bfd_elf64_link_create_dynamic_sections
1479 PARAMS ((bfd *, struct bfd_link_info *));
1480 extern Elf_Internal_Rela *_bfd_elf64_link_read_relocs
1481 PARAMS ((bfd *, asection *, PTR, Elf_Internal_Rela *, boolean));
1483 #define bfd_elf32_link_record_dynamic_symbol \
1484 _bfd_elf_link_record_dynamic_symbol
1485 #define bfd_elf64_link_record_dynamic_symbol \
1486 _bfd_elf_link_record_dynamic_symbol
1488 extern boolean _bfd_elf32_link_record_local_dynamic_symbol
1489 PARAMS ((struct bfd_link_info *, bfd *, long));
1490 extern boolean _bfd_elf64_link_record_local_dynamic_symbol
1491 PARAMS ((struct bfd_link_info *, bfd *, long));
1493 extern boolean _bfd_elf_close_and_cleanup
1495 extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn
1496 PARAMS ((bfd *, arelent *, struct symbol_cache_entry *, PTR,
1497 asection *, bfd *, char **));
1499 extern boolean _bfd_elf32_gc_sections
1500 PARAMS ((bfd *, struct bfd_link_info *));
1501 extern boolean _bfd_elf32_gc_common_finalize_got_offsets
1502 PARAMS ((bfd *, struct bfd_link_info *));
1503 extern boolean _bfd_elf32_gc_common_final_link
1504 PARAMS ((bfd *, struct bfd_link_info *));
1505 extern boolean _bfd_elf32_gc_record_vtinherit
1506 PARAMS ((bfd *, asection *, struct elf_link_hash_entry *, bfd_vma));
1507 extern boolean _bfd_elf32_gc_record_vtentry
1508 PARAMS ((bfd *, asection *, struct elf_link_hash_entry *, bfd_vma));
1510 extern boolean _bfd_elf64_gc_sections
1511 PARAMS ((bfd *, struct bfd_link_info *));
1512 extern boolean _bfd_elf64_gc_common_finalize_got_offsets
1513 PARAMS ((bfd *, struct bfd_link_info *));
1514 extern boolean _bfd_elf64_gc_common_final_link
1515 PARAMS ((bfd *, struct bfd_link_info *));
1516 extern boolean _bfd_elf64_gc_record_vtinherit
1517 PARAMS ((bfd *, asection *, struct elf_link_hash_entry *, bfd_vma));
1518 extern boolean _bfd_elf64_gc_record_vtentry
1519 PARAMS ((bfd *, asection *, struct elf_link_hash_entry *, bfd_vma));
1521 extern boolean _bfd_elf32_reloc_symbol_deleted_p
1522 PARAMS ((bfd_vma, PTR));
1523 extern boolean _bfd_elf64_reloc_symbol_deleted_p
1524 PARAMS ((bfd_vma, PTR));
1526 /* Exported interface for writing elf corefile notes. */
1527 extern char *elfcore_write_note
1528 PARAMS ((bfd *, char *, int *, char *, int, void *, int));
1529 extern char *elfcore_write_prpsinfo
1530 PARAMS ((bfd *, char *, int *, char *, char *));
1531 extern char *elfcore_write_prstatus
1532 PARAMS ((bfd *, char *, int *, long, int, void *));
1533 extern char * elfcore_write_pstatus
1534 PARAMS ((bfd *, char *, int *, long, int, void *));
1535 extern char *elfcore_write_prfpreg
1536 PARAMS ((bfd *, char *, int *, void *, int));
1537 extern char *elfcore_write_prxfpreg
1538 PARAMS ((bfd *, char *, int *, void *, int));
1539 extern char *elfcore_write_lwpstatus
1540 PARAMS ((bfd*, char*, int*, long, int, void*));
1542 /* MIPS ELF specific routines. */
1544 extern boolean _bfd_mips_elf_object_p
1546 extern boolean _bfd_mips_elf_section_from_shdr
1547 PARAMS ((bfd *, Elf_Internal_Shdr *, char *));
1548 extern boolean _bfd_mips_elf_fake_sections
1549 PARAMS ((bfd *, Elf_Internal_Shdr *, asection *));
1550 extern boolean _bfd_mips_elf_section_from_bfd_section
1551 PARAMS ((bfd *, asection *, int *));
1552 extern boolean _bfd_mips_elf_section_processing
1553 PARAMS ((bfd *, Elf_Internal_Shdr *));
1554 extern void _bfd_mips_elf_symbol_processing
1555 PARAMS ((bfd *, asymbol *));
1556 extern boolean _bfd_mips_elf_read_ecoff_info
1557 PARAMS ((bfd *, asection *, struct ecoff_debug_info *));
1558 extern void _bfd_mips_elf_final_write_processing
1559 PARAMS ((bfd *, boolean));
1560 extern bfd_reloc_status_type _bfd_mips_elf_hi16_reloc
1561 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
1562 extern bfd_reloc_status_type _bfd_mips_elf_lo16_reloc
1563 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
1564 extern bfd_reloc_status_type _bfd_mips_elf_gprel16_reloc
1565 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
1566 extern bfd_reloc_status_type _bfd_mips_elf_got16_reloc
1567 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
1568 extern bfd_reloc_status_type _bfd_mips_elf_gprel32_reloc
1569 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
1570 extern boolean _bfd_mips_elf_set_private_flags
1571 PARAMS ((bfd *, flagword));
1572 extern boolean _bfd_mips_elf_merge_private_bfd_data
1573 PARAMS ((bfd *, bfd *));
1574 extern boolean _bfd_mips_elf_find_nearest_line
1575 PARAMS ((bfd *, asection *, asymbol **, bfd_vma, const char **,
1576 const char **, unsigned int *));
1577 extern boolean _bfd_mips_elf_set_section_contents
1578 PARAMS ((bfd *, asection *, PTR, file_ptr, bfd_size_type));
1579 extern boolean _bfd_mips_elf_create_dynamic_sections
1580 PARAMS ((bfd *, struct bfd_link_info *));
1581 extern boolean _bfd_mips_elf_add_symbol_hook
1582 PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *,
1583 const char **, flagword *, asection **, bfd_vma *));
1584 extern boolean _bfd_mips_elf_adjust_dynamic_symbol
1585 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
1586 extern boolean _bfd_mips_elf_finish_dynamic_symbol
1587 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
1588 Elf_Internal_Sym *));
1589 extern boolean _bfd_mips_elf_finish_dynamic_sections
1590 PARAMS ((bfd *, struct bfd_link_info *));
1591 extern asection * _bfd_mips_elf_gc_mark_hook
1592 PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *,
1593 struct elf_link_hash_entry *, Elf_Internal_Sym *));
1594 extern boolean _bfd_mips_elf_gc_sweep_hook
1595 PARAMS ((bfd *, struct bfd_link_info *, asection *,
1596 const Elf_Internal_Rela *));
1597 extern boolean _bfd_mips_elf_always_size_sections
1598 PARAMS ((bfd *, struct bfd_link_info *));
1599 extern boolean _bfd_mips_elf_size_dynamic_sections
1600 PARAMS ((bfd *, struct bfd_link_info *));
1601 extern boolean _bfd_mips_elf_check_relocs
1602 PARAMS ((bfd *, struct bfd_link_info *, asection *,
1603 const Elf_Internal_Rela *));
1604 extern struct bfd_link_hash_table *_bfd_mips_elf_link_hash_table_create
1606 extern boolean _bfd_mips_elf_print_private_bfd_data
1607 PARAMS ((bfd *, PTR));
1608 extern boolean _bfd_mips_elf_link_output_symbol_hook
1609 PARAMS ((bfd *, struct bfd_link_info *, const char *, Elf_Internal_Sym *,
1611 extern boolean _bfd_mips_elf_final_link
1612 PARAMS ((bfd *, struct bfd_link_info *));
1613 extern int _bfd_mips_elf_additional_program_headers
1615 extern boolean _bfd_mips_elf_modify_segment_map
1617 extern boolean _bfd_mips_elf_relocate_section
1618 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
1619 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
1621 /* SH ELF specific routine. */
1623 extern boolean _sh_elf_set_mach_from_flags
1626 #endif /* _LIBELF_H_ */