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 bfd_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 struct elf_link_loaded_list
228 struct elf_link_loaded_list *next;
232 enum elf_link_info_type
237 ELF_INFO_TYPE_EH_FRAME,
238 ELF_INFO_TYPE_JUST_SYMS,
242 /* Structures used by the eh_frame optimization code. */
251 struct cie_header hdr;
252 unsigned char version;
253 unsigned char augmentation[20];
254 unsigned int code_align;
256 unsigned int ra_column;
257 unsigned int augmentation_size;
258 struct elf_link_hash_entry *personality;
259 unsigned char per_encoding;
260 unsigned char lsda_encoding;
261 unsigned char fde_encoding;
262 unsigned char initial_insn_length;
263 unsigned char make_relative;
264 unsigned char make_lsda_relative;
265 unsigned char initial_instructions[50];
273 unsigned int new_offset;
274 unsigned char fde_encoding;
275 unsigned char lsda_encoding;
276 unsigned char lsda_offset;
277 unsigned char cie : 1;
278 unsigned char removed : 1;
279 unsigned char make_relative : 1;
280 unsigned char make_lsda_relative : 1;
281 unsigned char per_encoding_relative : 1;
284 struct eh_frame_sec_info
287 unsigned int alloced;
288 struct eh_cie_fde entry[1];
291 struct eh_frame_array_ent
297 struct eh_frame_hdr_info
300 asection *last_cie_sec;
302 unsigned int last_cie_offset;
303 unsigned int fde_count, array_count;
304 struct eh_frame_array_ent *array;
305 /* TRUE if .eh_frame_hdr should contain the sorted search table.
306 We build it if we successfully read all .eh_frame input sections
307 and recognize them. */
311 /* Cached start, size and alignment of PT_TLS segment. */
312 struct elf_link_tls_segment
319 /* ELF linker hash table. */
321 struct elf_link_hash_table
323 struct bfd_link_hash_table root;
325 /* Whether we have created the special dynamic sections required
326 when linking against or generating a shared object. */
327 bfd_boolean dynamic_sections_created;
329 /* The BFD used to hold special sections created by the linker.
330 This will be the first BFD found which requires these sections to
334 /* The value to use when initialising got.refcount/offset and
335 plt.refcount/offset in an elf_link_hash_entry. Set to zero when
336 the values are refcounts. Set to -1 in size_dynamic_sections
337 when the values may be offsets. */
338 bfd_signed_vma init_refcount;
340 /* The number of symbols found in the link which must be put into
341 the .dynsym section. */
342 bfd_size_type dynsymcount;
344 /* The string table of dynamic symbols, which becomes the .dynstr
346 struct elf_strtab_hash *dynstr;
348 /* The number of buckets in the hash table in the .hash section.
349 This is based on the number of dynamic symbols. */
350 bfd_size_type bucketcount;
352 /* A linked list of DT_NEEDED names found in dynamic objects
353 included in the link. */
354 struct bfd_link_needed_list *needed;
356 /* The _GLOBAL_OFFSET_TABLE_ symbol. */
357 struct elf_link_hash_entry *hgot;
359 /* A pointer to information used to link stabs in sections. */
362 /* A pointer to information used to merge SEC_MERGE sections. */
365 /* Used by eh_frame code when editing .eh_frame. */
366 struct eh_frame_hdr_info eh_info;
368 /* A linked list of local symbols to be added to .dynsym. */
369 struct elf_link_local_dynamic_entry *dynlocal;
371 /* A linked list of DT_RPATH/DT_RUNPATH names found in dynamic
372 objects included in the link. */
373 struct bfd_link_needed_list *runpath;
375 /* Cached start, size and alignment of PT_TLS segment. */
376 struct elf_link_tls_segment *tls_segment;
378 /* A linked list of BFD's loaded in the link. */
379 struct elf_link_loaded_list *loaded;
382 /* Look up an entry in an ELF linker hash table. */
384 #define elf_link_hash_lookup(table, string, create, copy, follow) \
385 ((struct elf_link_hash_entry *) \
386 bfd_link_hash_lookup (&(table)->root, (string), (create), \
389 /* Traverse an ELF linker hash table. */
391 #define elf_link_hash_traverse(table, func, info) \
392 (bfd_link_hash_traverse \
394 (bfd_boolean (*) PARAMS ((struct bfd_link_hash_entry *, PTR))) (func), \
397 /* Get the ELF linker hash table from a link_info structure. */
399 #define elf_hash_table(p) ((struct elf_link_hash_table *) ((p)->hash))
401 /* Returns TRUE if the hash table is a struct elf_link_hash_table. */
402 #define is_elf_hash_table(p) \
403 ((p)->hash->type == bfd_link_elf_hash_table)
405 /* Used by bfd_section_from_r_symndx to cache a small number of local
406 symbol to section mappings. */
407 #define LOCAL_SYM_CACHE_SIZE 32
411 unsigned long indx[LOCAL_SYM_CACHE_SIZE];
412 asection *sec[LOCAL_SYM_CACHE_SIZE];
415 /* Constant information held for an ELF backend. */
417 struct elf_size_info {
418 unsigned char sizeof_ehdr, sizeof_phdr, sizeof_shdr;
419 unsigned char sizeof_rel, sizeof_rela, sizeof_sym, sizeof_dyn, sizeof_note;
421 /* The size of entries in the .hash section. */
422 unsigned char sizeof_hash_entry;
424 /* The number of internal relocations to allocate per external
426 unsigned char int_rels_per_ext_rel;
427 /* We use some fixed size arrays. This should be large enough to
428 handle all back-ends. */
429 #define MAX_INT_RELS_PER_EXT_REL 3
431 unsigned char arch_size, file_align;
432 unsigned char elfclass, ev_current;
433 int (*write_out_phdrs)
434 PARAMS ((bfd *, const Elf_Internal_Phdr *, unsigned int));
435 bfd_boolean (*write_shdrs_and_ehdr)
438 PARAMS ((bfd *, asection *, PTR));
439 void (*swap_symbol_in)
440 PARAMS ((bfd *, const PTR, const PTR, Elf_Internal_Sym *));
441 void (*swap_symbol_out)
442 PARAMS ((bfd *, const Elf_Internal_Sym *, PTR, PTR));
443 bfd_boolean (*slurp_reloc_table)
444 PARAMS ((bfd *, asection *, asymbol **, bfd_boolean));
445 long (*slurp_symbol_table)
446 PARAMS ((bfd *, asymbol **, bfd_boolean));
448 PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *));
450 PARAMS ((bfd *, const Elf_Internal_Dyn *, PTR));
452 /* This function is called to swap in a REL relocation. If an
453 external relocation corresponds to more than one internal
454 relocation, then all relocations are swapped in at once. */
455 void (*swap_reloc_in)
456 PARAMS ((bfd *, const bfd_byte *, Elf_Internal_Rela *));
458 /* This function is called to swap out a REL relocation. */
459 void (*swap_reloc_out)
460 PARAMS ((bfd *, const Elf_Internal_Rela *, bfd_byte *));
462 /* This function is called to swap in a RELA relocation. If an
463 external relocation corresponds to more than one internal
464 relocation, then all relocations are swapped in at once. */
465 void (*swap_reloca_in)
466 PARAMS ((bfd *, const bfd_byte *, Elf_Internal_Rela *));
468 /* This function is called to swap out a RELA relocation. */
469 void (*swap_reloca_out)
470 PARAMS ((bfd *, const Elf_Internal_Rela *, bfd_byte *));
473 #define elf_symbol_from(ABFD,S) \
474 (((S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \
475 && (S)->the_bfd->tdata.elf_obj_data != 0) \
476 ? (elf_symbol_type *) (S) \
479 enum elf_reloc_type_class {
481 reloc_class_relative,
486 struct elf_reloc_cookie
488 Elf_Internal_Rela *rels, *rel, *relend;
489 Elf_Internal_Sym *locsyms;
493 struct elf_link_hash_entry **sym_hashes;
494 bfd_boolean bad_symtab;
497 /* The level of IRIX compatibility we're striving for. */
505 struct elf_backend_data
507 /* The architecture for this backend. */
508 enum bfd_architecture arch;
510 /* The ELF machine code (EM_xxxx) for this backend. */
511 int elf_machine_code;
513 /* The maximum page size for this backend. */
516 /* A function to translate an ELF RELA relocation to a BFD arelent
518 void (*elf_info_to_howto)
519 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
521 /* A function to translate an ELF REL relocation to a BFD arelent
523 void (*elf_info_to_howto_rel)
524 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
526 /* A function to determine whether a symbol is global when
527 partitioning the symbol table into local and global symbols.
528 This should be NULL for most targets, in which case the correct
529 thing will be done. MIPS ELF, at least on the Irix 5, has
530 special requirements. */
531 bfd_boolean (*elf_backend_sym_is_global)
532 PARAMS ((bfd *, asymbol *));
534 /* The remaining functions are hooks which are called only if they
537 /* A function to permit a backend specific check on whether a
538 particular BFD format is relevant for an object file, and to
539 permit the backend to set any global information it wishes. When
540 this is called elf_elfheader is set, but anything else should be
541 used with caution. If this returns FALSE, the check_format
542 routine will return a bfd_error_wrong_format error. */
543 bfd_boolean (*elf_backend_object_p)
546 /* A function to do additional symbol processing when reading the
547 ELF symbol table. This is where any processor-specific special
548 section indices are handled. */
549 void (*elf_backend_symbol_processing)
550 PARAMS ((bfd *, asymbol *));
552 /* A function to do additional symbol processing after reading the
553 entire ELF symbol table. */
554 bfd_boolean (*elf_backend_symbol_table_processing)
555 PARAMS ((bfd *, elf_symbol_type *, unsigned int));
557 /* A function to set the type of the info field. Processor-specific
558 types should be handled here. */
559 int (*elf_backend_get_symbol_type)
560 PARAMS (( Elf_Internal_Sym *, int));
562 /* A function to do additional processing on the ELF section header
563 just before writing it out. This is used to set the flags and
564 type fields for some sections, or to actually write out data for
566 bfd_boolean (*elf_backend_section_processing)
567 PARAMS ((bfd *, Elf_Internal_Shdr *));
569 /* A function to handle unusual section types when creating BFD
570 sections from ELF sections. */
571 bfd_boolean (*elf_backend_section_from_shdr)
572 PARAMS ((bfd *, Elf_Internal_Shdr *, const char *));
574 /* A function to convert machine dependent section header flags to
575 BFD internal section header flags. */
576 bfd_boolean (*elf_backend_section_flags)
577 PARAMS ((flagword *, Elf_Internal_Shdr *));
579 /* A function to handle unusual program segment types when creating BFD
580 sections from ELF program segments. */
581 bfd_boolean (*elf_backend_section_from_phdr)
582 PARAMS ((bfd *, Elf_Internal_Phdr *, int));
584 /* A function to set up the ELF section header for a BFD section in
585 preparation for writing it out. This is where the flags and type
586 fields are set for unusual sections. */
587 bfd_boolean (*elf_backend_fake_sections)
588 PARAMS ((bfd *, Elf_Internal_Shdr *, asection *));
590 /* A function to get the ELF section index for a BFD section. If
591 this returns TRUE, the section was found. If it is a normal ELF
592 section, *RETVAL should be left unchanged. If it is not a normal
593 ELF section *RETVAL should be set to the SHN_xxxx index. */
594 bfd_boolean (*elf_backend_section_from_bfd_section)
595 PARAMS ((bfd *, asection *, int *retval));
597 /* If this field is not NULL, it is called by the add_symbols phase
598 of a link just before adding a symbol to the global linker hash
599 table. It may modify any of the fields as it wishes. If *NAME
600 is set to NULL, the symbol will be skipped rather than being
601 added to the hash table. This function is responsible for
602 handling all processor dependent symbol bindings and section
603 indices, and must set at least *FLAGS and *SEC for each processor
604 dependent case; failure to do so will cause a link error. */
605 bfd_boolean (*elf_add_symbol_hook)
606 PARAMS ((bfd *abfd, struct bfd_link_info *info,
607 const Elf_Internal_Sym *, const char **name,
608 flagword *flags, asection **sec, bfd_vma *value));
610 /* If this field is not NULL, it is called by the elf_link_output_sym
611 phase of a link for each symbol which will appear in the object file. */
612 bfd_boolean (*elf_backend_link_output_symbol_hook)
613 PARAMS ((bfd *, struct bfd_link_info *info, const char *,
614 Elf_Internal_Sym *, asection *));
616 /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend
617 linker the first time it encounters a dynamic object in the link.
618 This function must create any sections required for dynamic
619 linking. The ABFD argument is a dynamic object. The .interp,
620 .dynamic, .dynsym, .dynstr, and .hash functions have already been
621 created, and this function may modify the section flags if
622 desired. This function will normally create the .got and .plt
623 sections, but different backends have different requirements. */
624 bfd_boolean (*elf_backend_create_dynamic_sections)
625 PARAMS ((bfd *abfd, struct bfd_link_info *info));
627 /* The CHECK_RELOCS function is called by the add_symbols phase of
628 the ELF backend linker. It is called once for each section with
629 relocs of an object file, just after the symbols for the object
630 file have been added to the global linker hash table. The
631 function must look through the relocs and do any special handling
632 required. This generally means allocating space in the global
633 offset table, and perhaps allocating space for a reloc. The
634 relocs are always passed as Rela structures; if the section
635 actually uses Rel structures, the r_addend field will always be
637 bfd_boolean (*check_relocs)
638 PARAMS ((bfd *abfd, struct bfd_link_info *info, asection *o,
639 const Elf_Internal_Rela *relocs));
641 /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
642 linker for every symbol which is defined by a dynamic object and
643 referenced by a regular object. This is called after all the
644 input files have been seen, but before the SIZE_DYNAMIC_SECTIONS
645 function has been called. The hash table entry should be
646 bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be
647 defined in a section from a dynamic object. Dynamic object
648 sections are not included in the final link, and this function is
649 responsible for changing the value to something which the rest of
650 the link can deal with. This will normally involve adding an
651 entry to the .plt or .got or some such section, and setting the
652 symbol to point to that. */
653 bfd_boolean (*elf_backend_adjust_dynamic_symbol)
654 PARAMS ((struct bfd_link_info *info, struct elf_link_hash_entry *h));
656 /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker
657 after all the linker input files have been seen but before the
658 section sizes have been set. This is called after
659 ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS. */
660 bfd_boolean (*elf_backend_always_size_sections)
661 PARAMS ((bfd *output_bfd, struct bfd_link_info *info));
663 /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend
664 linker after all the linker input files have been seen but before
665 the sections sizes have been set. This is called after
666 ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols.
667 It is only called when linking against a dynamic object. It must
668 set the sizes of the dynamic sections, and may fill in their
669 contents as well. The generic ELF linker can handle the .dynsym,
670 .dynstr and .hash sections. This function must handle the
671 .interp section and any sections created by the
672 CREATE_DYNAMIC_SECTIONS entry point. */
673 bfd_boolean (*elf_backend_size_dynamic_sections)
674 PARAMS ((bfd *output_bfd, struct bfd_link_info *info));
676 /* The RELOCATE_SECTION function is called by the ELF backend linker
677 to handle the relocations for a section.
679 The relocs are always passed as Rela structures; if the section
680 actually uses Rel structures, the r_addend field will always be
683 This function is responsible for adjust the section contents as
684 necessary, and (if using Rela relocs and generating a
685 relocateable output file) adjusting the reloc addend as
688 This function does not have to worry about setting the reloc
689 address or the reloc symbol index.
691 LOCAL_SYMS is a pointer to the swapped in local symbols.
693 LOCAL_SECTIONS is an array giving the section in the input file
694 corresponding to the st_shndx field of each local symbol.
696 The global hash table entry for the global symbols can be found
697 via elf_sym_hashes (input_bfd).
699 When generating relocateable output, this function must handle
700 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
701 going to be the section symbol corresponding to the output
702 section, which means that the addend must be adjusted
704 bfd_boolean (*elf_backend_relocate_section)
705 PARAMS ((bfd *output_bfd, struct bfd_link_info *info,
706 bfd *input_bfd, asection *input_section, bfd_byte *contents,
707 Elf_Internal_Rela *relocs, Elf_Internal_Sym *local_syms,
708 asection **local_sections));
710 /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend
711 linker just before it writes a symbol out to the .dynsym section.
712 The processor backend may make any required adjustment to the
713 symbol. It may also take the opportunity to set contents of the
714 dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on
715 all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called
716 on those symbols which are defined by a dynamic object. */
717 bfd_boolean (*elf_backend_finish_dynamic_symbol)
718 PARAMS ((bfd *output_bfd, struct bfd_link_info *info,
719 struct elf_link_hash_entry *h, Elf_Internal_Sym *sym));
721 /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend
722 linker just before it writes all the dynamic sections out to the
723 output file. The FINISH_DYNAMIC_SYMBOL will have been called on
724 all dynamic symbols. */
725 bfd_boolean (*elf_backend_finish_dynamic_sections)
726 PARAMS ((bfd *output_bfd, struct bfd_link_info *info));
728 /* A function to do any beginning processing needed for the ELF file
729 before building the ELF headers and computing file positions. */
730 void (*elf_backend_begin_write_processing)
731 PARAMS ((bfd *, struct bfd_link_info *));
733 /* A function to do any final processing needed for the ELF file
734 before writing it out. The LINKER argument is TRUE if this BFD
735 was created by the ELF backend linker. */
736 void (*elf_backend_final_write_processing)
737 PARAMS ((bfd *, bfd_boolean linker));
739 /* This function is called by get_program_header_size. It should
740 return the number of additional program segments which this BFD
741 will need. It should return -1 on error. */
742 int (*elf_backend_additional_program_headers)
745 /* This function is called to modify an existing segment map in a
746 backend specific fashion. */
747 bfd_boolean (*elf_backend_modify_segment_map)
750 /* This function is called during section gc to discover the section a
751 particular relocation refers to. */
752 asection * (*gc_mark_hook)
753 PARAMS ((asection *sec, struct bfd_link_info *, Elf_Internal_Rela *,
754 struct elf_link_hash_entry *h, Elf_Internal_Sym *));
756 /* This function, if defined, is called during the sweep phase of gc
757 in order that a backend might update any data structures it might
759 bfd_boolean (*gc_sweep_hook)
760 PARAMS ((bfd *abfd, struct bfd_link_info *info, asection *o,
761 const Elf_Internal_Rela *relocs));
763 /* This function, if defined, is called after the ELF headers have
764 been created. This allows for things like the OS and ABI versions
766 void (*elf_backend_post_process_headers)
767 PARAMS ((bfd *, struct bfd_link_info *));
769 /* This function, if defined, prints a symbol to file and returns the
770 name of the symbol to be printed. It should return NULL to fall
771 back to default symbol printing. */
772 const char *(*elf_backend_print_symbol_all)
773 PARAMS ((bfd *, PTR, asymbol *));
775 /* This function, if defined, is called after all local symbols and
776 global symbols converted to locals are emited into the symtab
777 section. It allows the backend to emit special global symbols
778 not handled in the hash table. */
779 bfd_boolean (*elf_backend_output_arch_syms)
780 PARAMS ((bfd *, struct bfd_link_info *, PTR,
781 bfd_boolean (*) (PTR, const char *, Elf_Internal_Sym *, asection *)));
783 /* Copy any information related to dynamic linking from a pre-existing
784 symbol to a newly created symbol. Also called to copy flags and
785 other back-end info to a weakdef, in which case the symbol is not
786 newly created and plt/got refcounts and dynamic indices should not
788 void (*elf_backend_copy_indirect_symbol)
789 PARAMS ((struct elf_backend_data *, struct elf_link_hash_entry *,
790 struct elf_link_hash_entry *));
792 /* Modify any information related to dynamic linking such that the
793 symbol is not exported. */
794 void (*elf_backend_hide_symbol)
795 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean));
797 /* Emit relocations. Overrides default routine for emitting relocs,
798 except during a relocatable link, or if all relocs are being emitted. */
799 bfd_boolean (*elf_backend_emit_relocs)
800 PARAMS ((bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *));
802 /* Count relocations. Not called for relocatable links
803 or if all relocs are being preserved in the output. */
804 unsigned int (*elf_backend_count_relocs)
805 PARAMS ((asection *, Elf_Internal_Rela *));
807 /* This function, if defined, is called when an NT_PRSTATUS note is found
809 bfd_boolean (*elf_backend_grok_prstatus)
810 PARAMS ((bfd *, Elf_Internal_Note *));
812 /* This function, if defined, is called when an NT_PSINFO or NT_PRPSINFO
813 note is found in a core file. */
814 bfd_boolean (*elf_backend_grok_psinfo)
815 PARAMS ((bfd *, Elf_Internal_Note *));
817 /* Functions to print VMAs. Special code to handle 64 bit ELF files. */
818 void (* elf_backend_sprintf_vma)
819 PARAMS ((bfd *, char *, bfd_vma));
820 void (* elf_backend_fprintf_vma)
821 PARAMS ((bfd *, PTR, bfd_vma));
823 /* This function returns class of a reloc type. */
824 enum elf_reloc_type_class (*elf_backend_reloc_type_class)
825 PARAMS ((const Elf_Internal_Rela *));
827 /* This function, if defined, removes information about discarded functions
828 from other sections which mention them. */
829 bfd_boolean (*elf_backend_discard_info)
830 PARAMS ((bfd *, struct elf_reloc_cookie *, struct bfd_link_info *));
832 /* This function, if defined, signals that the function above has removed
833 the discarded relocations for this section. */
834 bfd_boolean (*elf_backend_ignore_discarded_relocs)
835 PARAMS ((asection *));
837 /* This function, if defined, may write out the given section.
838 Returns TRUE if it did so and FALSE if the caller should. */
839 bfd_boolean (*elf_backend_write_section)
840 PARAMS ((bfd *, asection *, bfd_byte *));
842 /* The level of IRIX compatibility we're striving for.
843 MIPS ELF specific function. */
844 irix_compat_t (*elf_backend_mips_irix_compat)
847 reloc_howto_type *(*elf_backend_mips_rtype_to_howto)
848 PARAMS ((unsigned int, bfd_boolean));
850 /* The swapping table to use when dealing with ECOFF information.
851 Used for the MIPS ELF .mdebug section. */
852 const struct ecoff_debug_swap *elf_backend_ecoff_debug_swap;
854 /* Alternate EM_xxxx machine codes for this backend. */
855 int elf_machine_alt1;
856 int elf_machine_alt2;
858 const struct elf_size_info *s;
860 /* offset of the _GLOBAL_OFFSET_TABLE_ symbol from the start of the
862 bfd_vma got_symbol_offset;
864 /* The size in bytes of the headers for the GOT and PLT. This includes
865 the so-called reserved entries on some systems. */
866 bfd_vma got_header_size;
867 bfd_vma plt_header_size;
869 /* This is TRUE if the linker should act like collect and gather
870 global constructors and destructors by name. This is TRUE for
871 MIPS ELF because the Irix 5 tools can not handle the .init
873 unsigned collect : 1;
875 /* This is TRUE if the linker should ignore changes to the type of a
876 symbol. This is TRUE for MIPS ELF because some Irix 5 objects
877 record undefined functions as STT_OBJECT although the definitions
879 unsigned type_change_ok : 1;
881 /* Whether the backend may use REL relocations. (Some backends use
882 both REL and RELA relocations, and this flag is set for those
884 unsigned may_use_rel_p : 1;
886 /* Whether the backend may use RELA relocations. (Some backends use
887 both REL and RELA relocations, and this flag is set for those
889 unsigned may_use_rela_p : 1;
891 /* Whether the default relocation type is RELA. If a backend with
892 this flag set wants REL relocations for a particular section,
893 it must note that explicitly. Similarly, if this flag is clear,
894 and the backend wants RELA relocations for a particular
896 unsigned default_use_rela_p : 1;
898 /* Set if RELA relocations for a relocatable link can be handled by
899 generic code. Backends that set this flag need do nothing in the
900 backend relocate_section routine for relocatable linking. */
901 unsigned rela_normal : 1;
903 /* TRUE if addresses "naturally" sign extend. This is used when
904 swapping in from Elf32 when BFD64. */
905 unsigned sign_extend_vma : 1;
907 unsigned want_got_plt : 1;
908 unsigned plt_readonly : 1;
909 unsigned want_plt_sym : 1;
910 unsigned plt_not_loaded : 1;
911 unsigned plt_alignment : 4;
912 unsigned can_gc_sections : 1;
913 unsigned can_refcount : 1;
914 unsigned want_got_sym : 1;
915 unsigned want_dynbss : 1;
916 /* Targets which do not support physical addressing often require
917 that the p_paddr field in the section header to be set to zero.
918 This field indicates whether this behavior is required. */
919 unsigned want_p_paddr_set_to_zero : 1;
922 /* Information stored for each BFD section in an ELF file. This
923 structure is allocated by elf_new_section_hook. */
925 struct bfd_elf_section_data
927 /* The ELF header for this section. */
928 Elf_Internal_Shdr this_hdr;
930 /* The ELF header for the reloc section associated with this
932 Elf_Internal_Shdr rel_hdr;
934 /* If there is a second reloc section associated with this section,
935 as can happen on Irix 6, this field points to the header. */
936 Elf_Internal_Shdr *rel_hdr2;
938 /* The number of relocations currently assigned to REL_HDR. */
939 unsigned int rel_count;
941 /* The number of relocations currently assigned to REL_HDR2. */
942 unsigned int rel_count2;
944 /* A pointer to a linked list tracking dynamic relocs copied for
948 /* A pointer to the bfd section used for dynamic relocs. */
951 /* The ELF section number of this section. Only used for an output
955 /* The ELF section number of the reloc section indicated by
956 REL_HDR if any. Only used for an output file. */
959 /* The ELF section number of the reloc section indicated by
960 REL_HDR2 if any. Only used for an output file. */
963 /* Used by the backend linker to store the symbol hash table entries
964 associated with relocs against global symbols. */
965 struct elf_link_hash_entry **rel_hashes;
967 /* A pointer to the swapped relocs. If the section uses REL relocs,
968 rather than RELA, all the r_addend fields will be zero. This
969 pointer may be NULL. It is used by the backend linker. */
970 Elf_Internal_Rela *relocs;
972 /* Used by the backend linker when generating a shared library to
973 record the dynamic symbol index for a section symbol
974 corresponding to this section. A value of 0 means that there is
975 no dynamic symbol for this section. */
978 /* A pointer used for various section optimizations. */
981 /* Type of that information. */
982 enum elf_link_info_type sec_info_type;
985 /* Group name, if this section is a member of a group. */
988 /* Group signature sym, if this is the SHT_GROUP section. */
989 struct symbol_cache_entry *id;
992 /* A linked list of sections in the group. Circular when used by
994 asection *next_in_group;
996 /* A pointer available for the processor specific ELF backend. */
999 /* Nonzero if this section uses RELA relocations, rather than REL. */
1000 unsigned int use_rela_p:1;
1002 /* Nonzero when a group is COMDAT. */
1003 unsigned int linkonce_p:1;
1006 #define elf_section_data(sec) ((struct bfd_elf_section_data*)sec->used_by_bfd)
1007 #define elf_group_name(sec) (elf_section_data(sec)->group.name)
1008 #define elf_group_id(sec) (elf_section_data(sec)->group.id)
1009 #define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group)
1010 #define elf_linkonce_p(sec) (elf_section_data(sec)->linkonce_p)
1012 /* Return TRUE if section has been discarded. */
1013 #define elf_discarded_section(sec) \
1014 (!bfd_is_abs_section(sec) \
1015 && bfd_is_abs_section((sec)->output_section) \
1016 && elf_section_data (sec)->sec_info_type != ELF_INFO_TYPE_MERGE \
1017 && elf_section_data (sec)->sec_info_type != ELF_INFO_TYPE_JUST_SYMS)
1019 #define get_elf_backend_data(abfd) \
1020 ((struct elf_backend_data *) (abfd)->xvec->backend_data)
1022 /* Enumeration to specify the special section. */
1023 typedef enum elf_linker_section_enum
1025 LINKER_SECTION_UNKNOWN, /* not used */
1026 LINKER_SECTION_GOT, /* .got section for global offset pointers */
1027 LINKER_SECTION_PLT, /* .plt section for generated procedure stubs */
1028 LINKER_SECTION_SDATA, /* .sdata/.sbss section for PowerPC */
1029 LINKER_SECTION_SDATA2, /* .sdata2/.sbss2 section for PowerPC */
1030 LINKER_SECTION_MAX /* # of linker sections */
1031 } elf_linker_section_enum_t;
1033 /* Sections created by the linker. */
1035 typedef struct elf_linker_section
1037 char *name; /* name of the section */
1038 char *rel_name; /* name of the associated .rel{,a}. section */
1039 char *bss_name; /* name of a related .bss section */
1040 char *sym_name; /* name of symbol to reference this section */
1041 asection *section; /* pointer to the section */
1042 asection *bss_section; /* pointer to the bss section associated with this */
1043 asection *rel_section; /* pointer to the relocations needed for this section */
1044 struct elf_link_hash_entry *sym_hash; /* pointer to the created symbol hash value */
1045 bfd_vma initial_size; /* initial size before any linker generated allocations */
1046 bfd_vma sym_offset; /* offset of symbol from beginning of section */
1047 bfd_vma hole_size; /* size of reserved address hole in allocation */
1048 bfd_vma hole_offset; /* current offset for the hole */
1049 bfd_vma max_hole_offset; /* maximum offset for the hole */
1050 elf_linker_section_enum_t which; /* which section this is */
1051 bfd_boolean hole_written_p; /* whether the hole has been initialized */
1052 unsigned int alignment; /* alignment for the section */
1053 flagword flags; /* flags to use to create the section */
1054 } elf_linker_section_t;
1056 /* Linked list of allocated pointer entries. This hangs off of the symbol lists, and
1057 provides allows us to return different pointers, based on different addend's. */
1059 typedef struct elf_linker_section_pointers
1061 struct elf_linker_section_pointers *next; /* next allocated pointer for this symbol */
1062 bfd_vma offset; /* offset of pointer from beginning of section */
1063 bfd_vma addend; /* addend used */
1064 elf_linker_section_enum_t which; /* which linker section this is */
1065 bfd_boolean written_address_p; /* whether address was written yet */
1066 } elf_linker_section_pointers_t;
1068 /* Some private data is stashed away for future use using the tdata pointer
1069 in the bfd structure. */
1071 struct elf_obj_tdata
1073 Elf_Internal_Ehdr elf_header[1]; /* Actual data, but ref like ptr */
1074 Elf_Internal_Shdr **elf_sect_ptr;
1075 Elf_Internal_Phdr *phdr;
1076 struct elf_segment_map *segment_map;
1077 struct elf_strtab_hash *strtab_ptr;
1080 unsigned int num_elf_sections; /* elf_sect_ptr size */
1081 int num_section_syms;
1082 asymbol **section_syms; /* STT_SECTION symbols for each section */
1083 Elf_Internal_Shdr symtab_hdr;
1084 Elf_Internal_Shdr shstrtab_hdr;
1085 Elf_Internal_Shdr strtab_hdr;
1086 Elf_Internal_Shdr dynsymtab_hdr;
1087 Elf_Internal_Shdr dynstrtab_hdr;
1088 Elf_Internal_Shdr dynversym_hdr;
1089 Elf_Internal_Shdr dynverref_hdr;
1090 Elf_Internal_Shdr dynverdef_hdr;
1091 Elf_Internal_Shdr symtab_shndx_hdr;
1092 unsigned int symtab_section, shstrtab_section;
1093 unsigned int strtab_section, dynsymtab_section;
1094 unsigned int symtab_shndx_section;
1095 unsigned int dynversym_section, dynverdef_section, dynverref_section;
1096 file_ptr next_file_pos;
1098 /* we don't need these inside bfd anymore, and I think
1099 these weren't used outside bfd. */
1100 void *prstatus; /* The raw /proc prstatus structure */
1101 void *prpsinfo; /* The raw /proc prpsinfo structure */
1103 bfd_vma gp; /* The gp value */
1104 unsigned int gp_size; /* The gp size */
1106 Elf_Internal_Shdr **group_sect_ptr;
1109 /* Information grabbed from an elf core file. */
1116 /* This is set to TRUE if the object was created by the backend
1120 /* A mapping from external symbols to entries in the linker hash
1121 table, used when linking. This is indexed by the symbol index
1122 minus the sh_info field of the symbol table header. */
1123 struct elf_link_hash_entry **sym_hashes;
1125 /* A mapping from local symbols to offsets into the global offset
1126 table, used when linking. This is indexed by the symbol index.
1127 Like for the globals, we use a union and two names primarily to
1128 document the intent of any particular piece of code. The field
1129 should be used as a count until size_dynamic_sections, at which
1130 point the contents of the .got is fixed. Afterward, if an entry
1131 is -1, then the symbol does not require a global offset table entry. */
1134 bfd_signed_vma *refcounts;
1138 /* A mapping from local symbols to offsets into the various linker
1139 sections added. This is index by the symbol index. */
1140 elf_linker_section_pointers_t **linker_section_pointers;
1142 /* The linker ELF emulation code needs to let the backend ELF linker
1143 know what filename should be used for a dynamic object if the
1144 dynamic object is found using a search. The emulation code then
1145 sometimes needs to know what name was actually used. Until the
1146 file has been added to the linker symbol table, this field holds
1147 the name the linker wants. After it has been added, it holds the
1148 name actually used, which will be the DT_SONAME entry if there is
1150 const char *dt_name;
1152 /* When a reference in a regular object is resolved by a shared
1153 object is loaded into via the DT_NEEDED entries by the linker
1154 ELF emulation code, we need to add the shared object to the
1155 DT_NEEDED list of the resulting binary to indicate the dependency
1156 as if the -l option is passed to the linker. This field holds the
1157 name of the loaded shared object. */
1158 const char *dt_soname;
1160 /* Irix 5 often screws up the symbol table, sorting local symbols
1161 after global symbols. This flag is set if the symbol table in
1162 this BFD appears to be screwed up. If it is, we ignore the
1163 sh_info field in the symbol table header, and always read all the
1165 bfd_boolean bad_symtab;
1167 /* Records the result of `get_program_header_size'. */
1168 bfd_size_type program_header_size;
1170 /* Used by find_nearest_line entry point. */
1173 /* Used by MIPS ELF find_nearest_line entry point. The structure
1174 could be included directly in this one, but there's no point to
1175 wasting the memory just for the infrequently called
1176 find_nearest_line. */
1177 struct mips_elf_find_line *find_line_info;
1179 /* A place to stash dwarf1 info for this bfd. */
1180 struct dwarf1_debug *dwarf1_find_line_info;
1182 /* A place to stash dwarf2 info for this bfd. */
1183 PTR dwarf2_find_line_info;
1185 /* An array of stub sections indexed by symbol number, used by the
1186 MIPS ELF linker. FIXME: We should figure out some way to only
1187 include this field for a MIPS ELF target. */
1188 asection **local_stubs;
1190 /* Used to determine if PT_GNU_EH_FRAME segment header should be
1192 asection *eh_frame_hdr;
1194 /* Used to determine if the e_flags field has been initialized */
1195 bfd_boolean flags_init;
1197 /* Number of symbol version definitions we are about to emit. */
1198 unsigned int cverdefs;
1200 /* Number of symbol version references we are about to emit. */
1201 unsigned int cverrefs;
1203 /* Symbol version definitions in external objects. */
1204 Elf_Internal_Verdef *verdef;
1206 /* Symbol version references to external objects. */
1207 Elf_Internal_Verneed *verref;
1209 /* Linker sections that we are interested in. */
1210 struct elf_linker_section *linker_section[ (int)LINKER_SECTION_MAX ];
1212 /* The Irix 5 support uses two virtual sections, which represent
1213 text/data symbols defined in dynamic objects. */
1214 asymbol *elf_data_symbol;
1215 asymbol *elf_text_symbol;
1216 asection *elf_data_section;
1217 asection *elf_text_section;
1220 #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
1221 #define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header)
1222 #define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr)
1223 #define elf_numsections(bfd) (elf_tdata(bfd) -> num_elf_sections)
1224 #define elf_shstrtab(bfd) (elf_tdata(bfd) -> strtab_ptr)
1225 #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section)
1226 #define elf_symtab_shndx(bfd) (elf_tdata(bfd) -> symtab_shndx_section)
1227 #define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section)
1228 #define elf_dynversym(bfd) (elf_tdata(bfd) -> dynversym_section)
1229 #define elf_dynverdef(bfd) (elf_tdata(bfd) -> dynverdef_section)
1230 #define elf_dynverref(bfd) (elf_tdata(bfd) -> dynverref_section)
1231 #define elf_num_locals(bfd) (elf_tdata(bfd) -> num_locals)
1232 #define elf_num_globals(bfd) (elf_tdata(bfd) -> num_globals)
1233 #define elf_section_syms(bfd) (elf_tdata(bfd) -> section_syms)
1234 #define elf_num_section_syms(bfd) (elf_tdata(bfd) -> num_section_syms)
1235 #define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
1236 #define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
1237 #define elf_gp(bfd) (elf_tdata(bfd) -> gp)
1238 #define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size)
1239 #define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes)
1240 #define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts)
1241 #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets)
1242 #define elf_local_ptr_offsets(bfd) (elf_tdata(bfd) -> linker_section_pointers)
1243 #define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name)
1244 #define elf_dt_soname(bfd) (elf_tdata(bfd) -> dt_soname)
1245 #define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab)
1246 #define elf_flags_init(bfd) (elf_tdata(bfd) -> flags_init)
1247 #define elf_linker_section(bfd,n) (elf_tdata(bfd) -> linker_section[(int)n])
1249 extern void _bfd_elf_swap_verdef_in
1250 PARAMS ((bfd *, const Elf_External_Verdef *, Elf_Internal_Verdef *));
1251 extern void _bfd_elf_swap_verdef_out
1252 PARAMS ((bfd *, const Elf_Internal_Verdef *, Elf_External_Verdef *));
1253 extern void _bfd_elf_swap_verdaux_in
1254 PARAMS ((bfd *, const Elf_External_Verdaux *, Elf_Internal_Verdaux *));
1255 extern void _bfd_elf_swap_verdaux_out
1256 PARAMS ((bfd *, const Elf_Internal_Verdaux *, Elf_External_Verdaux *));
1257 extern void _bfd_elf_swap_verneed_in
1258 PARAMS ((bfd *, const Elf_External_Verneed *, Elf_Internal_Verneed *));
1259 extern void _bfd_elf_swap_verneed_out
1260 PARAMS ((bfd *, const Elf_Internal_Verneed *, Elf_External_Verneed *));
1261 extern void _bfd_elf_swap_vernaux_in
1262 PARAMS ((bfd *, const Elf_External_Vernaux *, Elf_Internal_Vernaux *));
1263 extern void _bfd_elf_swap_vernaux_out
1264 PARAMS ((bfd *, const Elf_Internal_Vernaux *, Elf_External_Vernaux *));
1265 extern void _bfd_elf_swap_versym_in
1266 PARAMS ((bfd *, const Elf_External_Versym *, Elf_Internal_Versym *));
1267 extern void _bfd_elf_swap_versym_out
1268 PARAMS ((bfd *, const Elf_Internal_Versym *, Elf_External_Versym *));
1270 extern int _bfd_elf_section_from_bfd_section
1271 PARAMS ((bfd *, asection *));
1272 extern char *bfd_elf_string_from_elf_section
1273 PARAMS ((bfd *, unsigned, unsigned));
1274 extern char *bfd_elf_get_str_section
1275 PARAMS ((bfd *, unsigned));
1276 extern Elf_Internal_Sym *bfd_elf_get_elf_syms
1277 PARAMS ((bfd *, Elf_Internal_Shdr *, size_t, size_t,
1278 Elf_Internal_Sym *, PTR, Elf_External_Sym_Shndx *));
1280 extern bfd_boolean _bfd_elf_copy_private_bfd_data
1281 PARAMS ((bfd *, bfd *));
1282 extern bfd_boolean _bfd_elf_print_private_bfd_data
1283 PARAMS ((bfd *, PTR));
1284 extern void bfd_elf_print_symbol
1285 PARAMS ((bfd *, PTR, asymbol *, bfd_print_symbol_type));
1287 #define elf_string_from_elf_strtab(abfd, strindex) \
1288 bfd_elf_string_from_elf_section(abfd, elf_elfheader(abfd)->e_shstrndx, \
1291 #define bfd_elf32_print_symbol bfd_elf_print_symbol
1292 #define bfd_elf64_print_symbol bfd_elf_print_symbol
1294 extern void _bfd_elf_sprintf_vma
1295 PARAMS ((bfd *, char *, bfd_vma));
1296 extern void _bfd_elf_fprintf_vma
1297 PARAMS ((bfd *, PTR, bfd_vma));
1299 extern enum elf_reloc_type_class _bfd_elf_reloc_type_class
1300 PARAMS ((const Elf_Internal_Rela *));
1301 extern bfd_vma _bfd_elf_rela_local_sym
1302 PARAMS ((bfd *, Elf_Internal_Sym *, asection *, Elf_Internal_Rela *));
1303 extern bfd_vma _bfd_elf_rel_local_sym
1304 PARAMS ((bfd *, Elf_Internal_Sym *, asection **, bfd_vma));
1305 extern bfd_vma _bfd_elf_section_offset
1306 PARAMS ((bfd *, struct bfd_link_info *, asection *, bfd_vma));
1308 extern unsigned long bfd_elf_hash
1309 PARAMS ((const char *));
1311 extern bfd_reloc_status_type bfd_elf_generic_reloc
1312 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
1313 extern bfd_boolean bfd_elf_mkobject
1315 extern bfd_boolean bfd_elf_mkcorefile
1317 extern Elf_Internal_Shdr *bfd_elf_find_section
1318 PARAMS ((bfd *, char *));
1319 extern bfd_boolean _bfd_elf_make_section_from_shdr
1320 PARAMS ((bfd *, Elf_Internal_Shdr *, const char *));
1321 extern bfd_boolean _bfd_elf_make_section_from_phdr
1322 PARAMS ((bfd *, Elf_Internal_Phdr *, int, const char *));
1323 extern struct bfd_hash_entry *_bfd_elf_link_hash_newfunc
1324 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
1325 extern struct bfd_link_hash_table *_bfd_elf_link_hash_table_create
1327 extern void _bfd_elf_link_hash_copy_indirect
1328 PARAMS ((struct elf_backend_data *, struct elf_link_hash_entry *,
1329 struct elf_link_hash_entry *));
1330 extern void _bfd_elf_link_hash_hide_symbol
1331 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean));
1332 extern bfd_boolean _bfd_elf_link_hash_table_init
1333 PARAMS ((struct elf_link_hash_table *, bfd *,
1334 struct bfd_hash_entry *(*) (struct bfd_hash_entry *,
1335 struct bfd_hash_table *,
1337 extern bfd_boolean _bfd_elf_slurp_version_tables
1339 extern bfd_boolean _bfd_elf_merge_sections
1340 PARAMS ((bfd *, struct bfd_link_info *));
1341 extern bfd_boolean bfd_elf_discard_group
1342 PARAMS ((bfd *, struct sec *));
1343 extern void bfd_elf_set_group_contents
1344 PARAMS ((bfd *, asection *, PTR));
1345 extern void _bfd_elf_link_just_syms
1346 PARAMS ((asection *, struct bfd_link_info *));
1347 extern bfd_boolean _bfd_elf_copy_private_symbol_data
1348 PARAMS ((bfd *, asymbol *, bfd *, asymbol *));
1349 extern bfd_boolean _bfd_elf_copy_private_section_data
1350 PARAMS ((bfd *, asection *, bfd *, asection *));
1351 extern bfd_boolean _bfd_elf_write_object_contents
1353 extern bfd_boolean _bfd_elf_write_corefile_contents
1355 extern bfd_boolean _bfd_elf_set_section_contents
1356 PARAMS ((bfd *, sec_ptr, PTR, file_ptr, bfd_size_type));
1357 extern long _bfd_elf_get_symtab_upper_bound
1359 extern long _bfd_elf_get_symtab
1360 PARAMS ((bfd *, asymbol **));
1361 extern long _bfd_elf_get_dynamic_symtab_upper_bound
1363 extern long _bfd_elf_canonicalize_dynamic_symtab
1364 PARAMS ((bfd *, asymbol **));
1365 extern long _bfd_elf_get_reloc_upper_bound
1366 PARAMS ((bfd *, sec_ptr));
1367 extern long _bfd_elf_canonicalize_reloc
1368 PARAMS ((bfd *, sec_ptr, arelent **, asymbol **));
1369 extern long _bfd_elf_get_dynamic_reloc_upper_bound
1371 extern long _bfd_elf_canonicalize_dynamic_reloc
1372 PARAMS ((bfd *, arelent **, asymbol **));
1373 extern asymbol *_bfd_elf_make_empty_symbol
1375 extern void _bfd_elf_get_symbol_info
1376 PARAMS ((bfd *, asymbol *, symbol_info *));
1377 extern bfd_boolean _bfd_elf_is_local_label_name
1378 PARAMS ((bfd *, const char *));
1379 extern alent *_bfd_elf_get_lineno
1380 PARAMS ((bfd *, asymbol *));
1381 extern bfd_boolean _bfd_elf_set_arch_mach
1382 PARAMS ((bfd *, enum bfd_architecture, unsigned long));
1383 extern bfd_boolean _bfd_elf_find_nearest_line
1384 PARAMS ((bfd *, asection *, asymbol **, bfd_vma, const char **,
1385 const char **, unsigned int *));
1386 #define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols
1387 #define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
1388 extern int _bfd_elf_sizeof_headers
1389 PARAMS ((bfd *, bfd_boolean));
1390 extern bfd_boolean _bfd_elf_new_section_hook
1391 PARAMS ((bfd *, asection *));
1392 extern bfd_boolean _bfd_elf_init_reloc_shdr
1393 PARAMS ((bfd *, Elf_Internal_Shdr *, asection *, bfd_boolean));
1395 /* If the target doesn't have reloc handling written yet: */
1396 extern void _bfd_elf_no_info_to_howto
1397 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
1399 extern bfd_boolean bfd_section_from_shdr
1400 PARAMS ((bfd *, unsigned int shindex));
1401 extern bfd_boolean bfd_section_from_phdr
1402 PARAMS ((bfd *, Elf_Internal_Phdr *, int));
1404 extern int _bfd_elf_symbol_from_bfd_symbol
1405 PARAMS ((bfd *, asymbol **));
1407 extern asection *bfd_section_from_r_symndx
1408 PARAMS ((bfd *, struct sym_sec_cache *, asection *, unsigned long));
1409 extern asection *bfd_section_from_elf_index
1410 PARAMS ((bfd *, unsigned int));
1411 extern bfd_boolean _bfd_elf_create_dynamic_sections
1412 PARAMS ((bfd *, struct bfd_link_info *));
1413 extern struct bfd_strtab_hash *_bfd_elf_stringtab_init
1416 extern struct elf_strtab_hash * _bfd_elf_strtab_init
1418 extern void _bfd_elf_strtab_free
1419 PARAMS ((struct elf_strtab_hash *));
1420 extern bfd_size_type _bfd_elf_strtab_add
1421 PARAMS ((struct elf_strtab_hash *, const char *, bfd_boolean));
1422 extern void _bfd_elf_strtab_addref
1423 PARAMS ((struct elf_strtab_hash *, bfd_size_type));
1424 extern void _bfd_elf_strtab_delref
1425 PARAMS ((struct elf_strtab_hash *, bfd_size_type));
1426 extern void _bfd_elf_strtab_clear_all_refs
1427 PARAMS ((struct elf_strtab_hash *));
1428 extern bfd_size_type _bfd_elf_strtab_size
1429 PARAMS ((struct elf_strtab_hash *));
1430 extern bfd_size_type _bfd_elf_strtab_offset
1431 PARAMS ((struct elf_strtab_hash *, bfd_size_type));
1432 extern bfd_boolean _bfd_elf_strtab_emit
1433 PARAMS ((bfd *, struct elf_strtab_hash *));
1434 extern void _bfd_elf_strtab_finalize
1435 PARAMS ((struct elf_strtab_hash *));
1437 extern bfd_boolean _bfd_elf_discard_section_eh_frame
1438 PARAMS ((bfd *, struct bfd_link_info *, asection *,
1439 bfd_boolean (*) (bfd_vma, PTR), struct elf_reloc_cookie *));
1440 extern bfd_boolean _bfd_elf_discard_section_eh_frame_hdr
1441 PARAMS ((bfd *, struct bfd_link_info *));
1442 extern bfd_vma _bfd_elf_eh_frame_section_offset
1443 PARAMS ((bfd *, asection *, bfd_vma));
1444 extern bfd_boolean _bfd_elf_write_section_eh_frame
1445 PARAMS ((bfd *, struct bfd_link_info *, asection *, bfd_byte *));
1446 extern bfd_boolean _bfd_elf_write_section_eh_frame_hdr
1447 PARAMS ((bfd *, struct bfd_link_info *));
1448 extern bfd_boolean _bfd_elf_maybe_strip_eh_frame_hdr
1449 PARAMS ((struct bfd_link_info *));
1451 extern bfd_boolean _bfd_elf_link_record_dynamic_symbol
1452 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
1453 extern long _bfd_elf_link_lookup_local_dynindx
1454 PARAMS ((struct bfd_link_info *, bfd *, long));
1455 extern bfd_boolean _bfd_elf_compute_section_file_positions
1456 PARAMS ((bfd *, struct bfd_link_info *));
1457 extern void _bfd_elf_assign_file_positions_for_relocs
1459 extern file_ptr _bfd_elf_assign_file_position_for_section
1460 PARAMS ((Elf_Internal_Shdr *, file_ptr, bfd_boolean));
1462 extern bfd_boolean _bfd_elf_validate_reloc
1463 PARAMS ((bfd *, arelent *));
1465 extern bfd_boolean _bfd_elf_create_dynamic_sections
1466 PARAMS ((bfd *, struct bfd_link_info *));
1467 extern bfd_boolean _bfd_elf_create_got_section
1468 PARAMS ((bfd *, struct bfd_link_info *));
1469 extern unsigned long _bfd_elf_link_renumber_dynsyms
1470 PARAMS ((bfd *, struct bfd_link_info *));
1472 extern bfd_boolean _bfd_elfcore_make_pseudosection
1473 PARAMS ((bfd *, char *, size_t, ufile_ptr));
1474 extern char *_bfd_elfcore_strndup
1475 PARAMS ((bfd *, char *, size_t));
1477 extern elf_linker_section_t *_bfd_elf_create_linker_section
1478 PARAMS ((bfd *, struct bfd_link_info *, enum elf_linker_section_enum,
1479 elf_linker_section_t *));
1481 extern elf_linker_section_pointers_t *_bfd_elf_find_pointer_linker_section
1482 PARAMS ((elf_linker_section_pointers_t *, bfd_vma,
1483 elf_linker_section_enum_t));
1485 extern bfd_boolean bfd_elf32_create_pointer_linker_section
1486 PARAMS ((bfd *, struct bfd_link_info *, elf_linker_section_t *,
1487 struct elf_link_hash_entry *, const Elf_Internal_Rela *));
1489 extern bfd_vma bfd_elf32_finish_pointer_linker_section
1490 PARAMS ((bfd *, bfd *, struct bfd_link_info *, elf_linker_section_t *,
1491 struct elf_link_hash_entry *, bfd_vma,
1492 const Elf_Internal_Rela *, int));
1494 extern bfd_boolean bfd_elf64_create_pointer_linker_section
1495 PARAMS ((bfd *, struct bfd_link_info *, elf_linker_section_t *,
1496 struct elf_link_hash_entry *, const Elf_Internal_Rela *));
1498 extern bfd_vma bfd_elf64_finish_pointer_linker_section
1499 PARAMS ((bfd *, bfd *, struct bfd_link_info *, elf_linker_section_t *,
1500 struct elf_link_hash_entry *, bfd_vma,
1501 const Elf_Internal_Rela *, int));
1503 extern bfd_boolean _bfd_elf_make_linker_section_rela
1504 PARAMS ((bfd *, elf_linker_section_t *, int));
1506 extern const bfd_target *bfd_elf32_object_p
1508 extern const bfd_target *bfd_elf32_core_file_p
1510 extern char *bfd_elf32_core_file_failing_command
1512 extern int bfd_elf32_core_file_failing_signal
1514 extern bfd_boolean bfd_elf32_core_file_matches_executable_p
1515 PARAMS ((bfd *, bfd *));
1517 extern bfd_boolean bfd_elf32_bfd_link_add_symbols
1518 PARAMS ((bfd *, struct bfd_link_info *));
1519 extern bfd_boolean bfd_elf32_bfd_final_link
1520 PARAMS ((bfd *, struct bfd_link_info *));
1522 extern void bfd_elf32_swap_symbol_in
1523 PARAMS ((bfd *, const PTR, const PTR, Elf_Internal_Sym *));
1524 extern void bfd_elf32_swap_symbol_out
1525 PARAMS ((bfd *, const Elf_Internal_Sym *, PTR, PTR));
1526 extern void bfd_elf32_swap_reloc_in
1527 PARAMS ((bfd *, const bfd_byte *, Elf_Internal_Rela *));
1528 extern void bfd_elf32_swap_reloc_out
1529 PARAMS ((bfd *, const Elf_Internal_Rela *, bfd_byte *));
1530 extern void bfd_elf32_swap_reloca_in
1531 PARAMS ((bfd *, const bfd_byte *, Elf_Internal_Rela *));
1532 extern void bfd_elf32_swap_reloca_out
1533 PARAMS ((bfd *, const Elf_Internal_Rela *, bfd_byte *));
1534 extern void bfd_elf32_swap_phdr_in
1535 PARAMS ((bfd *, const Elf32_External_Phdr *, Elf_Internal_Phdr *));
1536 extern void bfd_elf32_swap_phdr_out
1537 PARAMS ((bfd *, const Elf_Internal_Phdr *, Elf32_External_Phdr *));
1538 extern void bfd_elf32_swap_dyn_in
1539 PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *));
1540 extern void bfd_elf32_swap_dyn_out
1541 PARAMS ((bfd *, const Elf_Internal_Dyn *, PTR));
1542 extern long bfd_elf32_slurp_symbol_table
1543 PARAMS ((bfd *, asymbol **, bfd_boolean));
1544 extern bfd_boolean bfd_elf32_write_shdrs_and_ehdr
1546 extern int bfd_elf32_write_out_phdrs
1547 PARAMS ((bfd *, const Elf_Internal_Phdr *, unsigned int));
1548 extern void bfd_elf32_write_relocs
1549 PARAMS ((bfd *, asection *, PTR));
1550 extern bfd_boolean bfd_elf32_slurp_reloc_table
1551 PARAMS ((bfd *, asection *, asymbol **, bfd_boolean));
1552 extern bfd_boolean bfd_elf32_add_dynamic_entry
1553 PARAMS ((struct bfd_link_info *, bfd_vma, bfd_vma));
1554 extern bfd_boolean bfd_elf32_link_create_dynamic_sections
1555 PARAMS ((bfd *, struct bfd_link_info *));
1556 extern Elf_Internal_Rela *_bfd_elf32_link_read_relocs
1557 PARAMS ((bfd *, asection *, PTR, Elf_Internal_Rela *, bfd_boolean));
1559 extern const bfd_target *bfd_elf64_object_p
1561 extern const bfd_target *bfd_elf64_core_file_p
1563 extern char *bfd_elf64_core_file_failing_command
1565 extern int bfd_elf64_core_file_failing_signal
1567 extern bfd_boolean bfd_elf64_core_file_matches_executable_p
1568 PARAMS ((bfd *, bfd *));
1569 extern bfd_boolean bfd_elf64_bfd_link_add_symbols
1570 PARAMS ((bfd *, struct bfd_link_info *));
1571 extern bfd_boolean bfd_elf64_bfd_final_link
1572 PARAMS ((bfd *, struct bfd_link_info *));
1574 extern void bfd_elf64_swap_symbol_in
1575 PARAMS ((bfd *, const PTR, const PTR, Elf_Internal_Sym *));
1576 extern void bfd_elf64_swap_symbol_out
1577 PARAMS ((bfd *, const Elf_Internal_Sym *, PTR, PTR));
1578 extern void bfd_elf64_swap_reloc_in
1579 PARAMS ((bfd *, const bfd_byte *, Elf_Internal_Rela *));
1580 extern void bfd_elf64_swap_reloc_out
1581 PARAMS ((bfd *, const Elf_Internal_Rela *, bfd_byte *));
1582 extern void bfd_elf64_swap_reloca_in
1583 PARAMS ((bfd *, const bfd_byte *, Elf_Internal_Rela *));
1584 extern void bfd_elf64_swap_reloca_out
1585 PARAMS ((bfd *, const Elf_Internal_Rela *, bfd_byte *));
1586 extern void bfd_elf64_swap_phdr_in
1587 PARAMS ((bfd *, const Elf64_External_Phdr *, Elf_Internal_Phdr *));
1588 extern void bfd_elf64_swap_phdr_out
1589 PARAMS ((bfd *, const Elf_Internal_Phdr *, Elf64_External_Phdr *));
1590 extern void bfd_elf64_swap_dyn_in
1591 PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *));
1592 extern void bfd_elf64_swap_dyn_out
1593 PARAMS ((bfd *, const Elf_Internal_Dyn *, PTR));
1594 extern long bfd_elf64_slurp_symbol_table
1595 PARAMS ((bfd *, asymbol **, bfd_boolean));
1596 extern bfd_boolean bfd_elf64_write_shdrs_and_ehdr
1598 extern int bfd_elf64_write_out_phdrs
1599 PARAMS ((bfd *, const Elf_Internal_Phdr *, unsigned int));
1600 extern void bfd_elf64_write_relocs
1601 PARAMS ((bfd *, asection *, PTR));
1602 extern bfd_boolean bfd_elf64_slurp_reloc_table
1603 PARAMS ((bfd *, asection *, asymbol **, bfd_boolean));
1604 extern bfd_boolean bfd_elf64_add_dynamic_entry
1605 PARAMS ((struct bfd_link_info *, bfd_vma, bfd_vma));
1606 extern bfd_boolean bfd_elf64_link_create_dynamic_sections
1607 PARAMS ((bfd *, struct bfd_link_info *));
1608 extern Elf_Internal_Rela *_bfd_elf64_link_read_relocs
1609 PARAMS ((bfd *, asection *, PTR, Elf_Internal_Rela *, bfd_boolean));
1611 #define bfd_elf32_link_record_dynamic_symbol \
1612 _bfd_elf_link_record_dynamic_symbol
1613 #define bfd_elf64_link_record_dynamic_symbol \
1614 _bfd_elf_link_record_dynamic_symbol
1616 extern int elf_link_record_local_dynamic_symbol
1617 PARAMS ((struct bfd_link_info *, bfd *, long));
1618 #define _bfd_elf32_link_record_local_dynamic_symbol \
1619 elf_link_record_local_dynamic_symbol
1620 #define _bfd_elf64_link_record_local_dynamic_symbol \
1621 elf_link_record_local_dynamic_symbol
1623 extern bfd_boolean _bfd_elf_close_and_cleanup
1625 extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn
1626 PARAMS ((bfd *, arelent *, struct symbol_cache_entry *, PTR,
1627 asection *, bfd *, char **));
1629 extern bfd_boolean _bfd_elf32_gc_sections
1630 PARAMS ((bfd *, struct bfd_link_info *));
1631 extern bfd_boolean _bfd_elf32_gc_common_finalize_got_offsets
1632 PARAMS ((bfd *, struct bfd_link_info *));
1633 extern bfd_boolean _bfd_elf32_gc_common_final_link
1634 PARAMS ((bfd *, struct bfd_link_info *));
1635 extern bfd_boolean _bfd_elf32_gc_record_vtinherit
1636 PARAMS ((bfd *, asection *, struct elf_link_hash_entry *, bfd_vma));
1637 extern bfd_boolean _bfd_elf32_gc_record_vtentry
1638 PARAMS ((bfd *, asection *, struct elf_link_hash_entry *, bfd_vma));
1640 extern bfd_boolean _bfd_elf64_gc_sections
1641 PARAMS ((bfd *, struct bfd_link_info *));
1642 extern bfd_boolean _bfd_elf64_gc_common_finalize_got_offsets
1643 PARAMS ((bfd *, struct bfd_link_info *));
1644 extern bfd_boolean _bfd_elf64_gc_common_final_link
1645 PARAMS ((bfd *, struct bfd_link_info *));
1646 extern bfd_boolean _bfd_elf64_gc_record_vtinherit
1647 PARAMS ((bfd *, asection *, struct elf_link_hash_entry *, bfd_vma));
1648 extern bfd_boolean _bfd_elf64_gc_record_vtentry
1649 PARAMS ((bfd *, asection *, struct elf_link_hash_entry *, bfd_vma));
1651 extern bfd_boolean _bfd_elf32_reloc_symbol_deleted_p
1652 PARAMS ((bfd_vma, PTR));
1653 extern bfd_boolean _bfd_elf64_reloc_symbol_deleted_p
1654 PARAMS ((bfd_vma, PTR));
1656 /* Exported interface for writing elf corefile notes. */
1657 extern char *elfcore_write_note
1658 PARAMS ((bfd *, char *, int *, const char *, int, const PTR, int));
1659 extern char *elfcore_write_prpsinfo
1660 PARAMS ((bfd *, char *, int *, const char *, const char *));
1661 extern char *elfcore_write_prstatus
1662 PARAMS ((bfd *, char *, int *, long, int, const PTR));
1663 extern char * elfcore_write_pstatus
1664 PARAMS ((bfd *, char *, int *, long, int, const PTR));
1665 extern char *elfcore_write_prfpreg
1666 PARAMS ((bfd *, char *, int *, const PTR, int));
1667 extern char *elfcore_write_prxfpreg
1668 PARAMS ((bfd *, char *, int *, const PTR, int));
1669 extern char *elfcore_write_lwpstatus
1670 PARAMS ((bfd *, char *, int *, long, int, const PTR));
1672 /* SH ELF specific routine. */
1674 extern bfd_boolean _sh_elf_set_mach_from_flags
1677 #endif /* _LIBELF_H_ */