1 /* BFD back-end data structures for ELF files.
2 Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
3 2002 Free Software Foundation, Inc.
4 Written by Cygnus Support.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
25 #include "elf/common.h"
26 #include "elf/internal.h"
27 #include "elf/external.h"
30 /* The number of entries in a section is its size divided by the size
31 of a single entry. This is normally only applicable to reloc and
32 symbol table sections. */
33 #define NUM_SHDR_ENTRIES(shdr) ((shdr)->sh_size / (shdr)->sh_entsize)
35 /* If size isn't specified as 64 or 32, NAME macro should fail. */
36 /* Do not "beautify" the CONCAT* macro args. Traditional C will not
37 remove whitespace added here, and thus will fail to concatenate
41 #define NAME(x,y) CONCAT4 (x,64,_,y)
44 #define NAME(x,y) CONCAT4 (x,32,_,y)
49 #define NAME(x,y) CONCAT4 (x,NOSIZE,_,y)
52 #define ElfNAME(X) NAME(Elf,X)
53 #define elfNAME(X) NAME(elf,X)
55 /* Information held for an ELF symbol. The first field is the
56 corresponding asymbol. Every symbol is an ELF file is actually a
57 pointer to this structure, although it is often handled as a
58 pointer to an asymbol. */
64 /* ELF symbol information. */
65 Elf_Internal_Sym internal_elf_sym
;
66 /* Backend specific information. */
69 unsigned int hppa_arg_reloc
;
75 /* Version information. This is from an Elf_Internal_Versym
76 structure in a SHT_GNU_versym section. It is zero if there is no
77 version information. */
78 unsigned short version
;
82 struct elf_strtab_hash
;
84 /* ELF linker hash table entries. */
86 struct elf_link_hash_entry
88 struct bfd_link_hash_entry root
;
90 /* Symbol index in output file. This is initialized to -1. It is
91 set to -2 if the symbol is used by a reloc. */
94 /* Symbol index as a dynamic symbol. Initialized to -1, and remains
95 -1 if this is not a dynamic symbol. */
96 /* ??? Note that this is consistently used as a synonym for tests
97 against whether we can perform various simplifying transformations
98 to the code. (E.g. changing a pc-relative jump to a PLT entry
99 into a pc-relative jump to the target function.) That test, which
100 is often relatively complex, and someplaces wrong or incomplete,
101 should really be replaced by a predicate in elflink.c.
103 End result: this field -1 does not indicate that the symbol is
104 not in the dynamic symbol table, but rather that the symbol is
105 not visible outside this DSO. */
108 /* String table index in .dynstr if this is a dynamic symbol. */
109 unsigned long dynstr_index
;
111 /* Hash value of the name computed using the ELF hash function. */
112 unsigned long elf_hash_value
;
114 /* If this is a weak defined symbol from a dynamic object, this
115 field points to a defined symbol with the same value, if there is
116 one. Otherwise it is NULL. */
117 struct elf_link_hash_entry
*weakdef
;
119 /* If this symbol is used in the linker created sections, the processor
120 specific backend uses this field to map the field into the offset
121 from the beginning of the section. */
122 struct elf_linker_section_pointers
*linker_section_pointer
;
124 /* Version information. */
127 /* This field is used for a symbol which is not defined in a
128 regular object. It points to the version information read in
129 from the dynamic object. */
130 Elf_Internal_Verdef
*verdef
;
131 /* This field is used for a symbol which is defined in a regular
132 object. It is set up in size_dynamic_sections. It points to
133 the version information we should write out for this symbol. */
134 struct bfd_elf_version_tree
*vertree
;
137 /* Virtual table entry use information. This array is nominally of size
138 size/sizeof(target_void_pointer), though we have to be able to assume
139 and track a size while the symbol is still undefined. It is indexed
140 via offset/sizeof(target_void_pointer). */
141 size_t vtable_entries_size
;
142 boolean
*vtable_entries_used
;
144 /* Virtual table derivation info. */
145 struct elf_link_hash_entry
*vtable_parent
;
147 /* If this symbol requires an entry in the global offset table, the
148 processor specific backend uses this field to track usage and
149 final offset. We use a union and two names primarily to document
150 the intent of any particular piece of code. The field should be
151 used as a count until size_dynamic_sections, at which point the
152 contents of the .got is fixed. Afterward, if this field is -1,
153 then the symbol does not require a global offset table entry. */
156 bfd_signed_vma refcount
;
160 /* Same, but tracks a procedure linkage table entry. */
163 bfd_signed_vma refcount
;
170 /* Symbol type (STT_NOTYPE, STT_OBJECT, etc.). */
173 /* Symbol st_other value, symbol visibility. */
176 /* Some flags; legal values follow. */
177 unsigned short elf_link_hash_flags
;
178 /* Symbol is referenced by a non-shared object. */
179 #define ELF_LINK_HASH_REF_REGULAR 01
180 /* Symbol is defined by a non-shared object. */
181 #define ELF_LINK_HASH_DEF_REGULAR 02
182 /* Symbol is referenced by a shared object. */
183 #define ELF_LINK_HASH_REF_DYNAMIC 04
184 /* Symbol is defined by a shared object. */
185 #define ELF_LINK_HASH_DEF_DYNAMIC 010
186 /* Symbol has a non-weak reference from a non-shared object. */
187 #define ELF_LINK_HASH_REF_REGULAR_NONWEAK 020
188 /* Dynamic symbol has been adjustd. */
189 #define ELF_LINK_HASH_DYNAMIC_ADJUSTED 040
190 /* Symbol needs a copy reloc. */
191 #define ELF_LINK_HASH_NEEDS_COPY 0100
192 /* Symbol needs a procedure linkage table entry. */
193 #define ELF_LINK_HASH_NEEDS_PLT 0200
194 /* Symbol appears in a non-ELF input file. */
195 #define ELF_LINK_NON_ELF 0400
196 /* Symbol should be marked as hidden in the version information. */
197 #define ELF_LINK_HIDDEN 01000
198 /* Symbol was forced to local scope due to a version script file. */
199 #define ELF_LINK_FORCED_LOCAL 02000
200 /* Symbol was marked during garbage collection. */
201 #define ELF_LINK_HASH_MARK 04000
202 /* Symbol is referenced by a non-GOT/non-PLT relocation. This is
203 not currently set by all the backends. */
204 #define ELF_LINK_NON_GOT_REF 010000
207 /* Records local symbols to be emitted in the dynamic symbol table. */
209 struct elf_link_local_dynamic_entry
211 struct elf_link_local_dynamic_entry
*next
;
213 /* The input bfd this symbol came from. */
216 /* The index of the local symbol being copied. */
219 /* The index in the outgoing dynamic symbol table. */
222 /* A copy of the input symbol. */
223 Elf_Internal_Sym isym
;
226 enum elf_link_info_type
231 ELF_INFO_TYPE_EH_FRAME
,
232 ELF_INFO_TYPE_EH_FRAME_HDR
,
233 ELF_INFO_TYPE_JUST_SYMS
,
237 /* ELF linker hash table. */
239 struct elf_link_hash_table
241 struct bfd_link_hash_table root
;
243 /* Whether we have created the special dynamic sections required
244 when linking against or generating a shared object. */
245 boolean dynamic_sections_created
;
247 /* The BFD used to hold special sections created by the linker.
248 This will be the first BFD found which requires these sections to
252 /* The value to use when initialising got.refcount/offset and
253 plt.refcount/offset in an elf_link_hash_entry. Set to zero when
254 the values are refcounts. Set to -1 in size_dynamic_sections
255 when the values may be offsets. */
256 bfd_signed_vma init_refcount
;
258 /* The number of symbols found in the link which must be put into
259 the .dynsym section. */
260 bfd_size_type dynsymcount
;
262 /* The string table of dynamic symbols, which becomes the .dynstr
264 struct elf_strtab_hash
*dynstr
;
266 /* The number of buckets in the hash table in the .hash section.
267 This is based on the number of dynamic symbols. */
268 bfd_size_type bucketcount
;
270 /* A linked list of DT_NEEDED names found in dynamic objects
271 included in the link. */
272 struct bfd_link_needed_list
*needed
;
274 /* The _GLOBAL_OFFSET_TABLE_ symbol. */
275 struct elf_link_hash_entry
*hgot
;
277 /* A pointer to information used to link stabs in sections. */
280 /* A pointer to information used to merge SEC_MERGE sections. */
283 /* A linked list of local symbols to be added to .dynsym. */
284 struct elf_link_local_dynamic_entry
*dynlocal
;
286 /* A linked list of DT_RPATH/DT_RUNPATH names found in dynamic
287 objects included in the link. */
288 struct bfd_link_needed_list
*runpath
;
291 /* Look up an entry in an ELF linker hash table. */
293 #define elf_link_hash_lookup(table, string, create, copy, follow) \
294 ((struct elf_link_hash_entry *) \
295 bfd_link_hash_lookup (&(table)->root, (string), (create), \
298 /* Traverse an ELF linker hash table. */
300 #define elf_link_hash_traverse(table, func, info) \
301 (bfd_link_hash_traverse \
303 (boolean (*) PARAMS ((struct bfd_link_hash_entry *, PTR))) (func), \
306 /* Get the ELF linker hash table from a link_info structure. */
308 #define elf_hash_table(p) ((struct elf_link_hash_table *) ((p)->hash))
310 /* Returns true if the hash table is a struct elf_link_hash_table. */
311 #define is_elf_hash_table(p) \
312 ((p)->hash->type == bfd_link_elf_hash_table)
314 /* Used by bfd_section_from_r_symndx to cache a small number of local
315 symbol to section mappings. */
316 #define LOCAL_SYM_CACHE_SIZE 32
320 unsigned long indx
[LOCAL_SYM_CACHE_SIZE
];
321 asection
*sec
[LOCAL_SYM_CACHE_SIZE
];
324 /* Constant information held for an ELF backend. */
326 struct elf_size_info
{
327 unsigned char sizeof_ehdr
, sizeof_phdr
, sizeof_shdr
;
328 unsigned char sizeof_rel
, sizeof_rela
, sizeof_sym
, sizeof_dyn
, sizeof_note
;
330 /* The size of entries in the .hash section. */
331 unsigned char sizeof_hash_entry
;
333 /* The number of internal relocations to allocate per external
335 unsigned char int_rels_per_ext_rel
;
337 unsigned char arch_size
, file_align
;
338 unsigned char elfclass
, ev_current
;
339 int (*write_out_phdrs
)
340 PARAMS ((bfd
*, const Elf_Internal_Phdr
*, unsigned int));
341 boolean (*write_shdrs_and_ehdr
)
344 PARAMS ((bfd
*, asection
*, PTR
));
345 void (*swap_symbol_out
)
346 PARAMS ((bfd
*, const Elf_Internal_Sym
*, PTR
, PTR
));
347 boolean (*slurp_reloc_table
)
348 PARAMS ((bfd
*, asection
*, asymbol
**, boolean
));
349 long (*slurp_symbol_table
)
350 PARAMS ((bfd
*, asymbol
**, boolean
));
352 PARAMS ((bfd
*, const PTR
, Elf_Internal_Dyn
*));
354 PARAMS ((bfd
*, const Elf_Internal_Dyn
*, PTR
));
356 /* This function, if defined, is called to swap in a REL
357 relocation. If an external relocation corresponds to more than
358 one internal relocation, then all relocations are swapped in at
360 void (*swap_reloc_in
)
361 PARAMS ((bfd
*, const bfd_byte
*, Elf_Internal_Rel
*));
363 /* This function, if defined, is called to swap out a REL
365 void (*swap_reloc_out
)
366 PARAMS ((bfd
*, const Elf_Internal_Rel
*, bfd_byte
*));
368 /* This function, if defined, is called to swap in a RELA
369 relocation. If an external relocation corresponds to more than
370 one internal relocation, then all relocations are swapped in at
372 void (*swap_reloca_in
)
373 PARAMS ((bfd
*, const bfd_byte
*, Elf_Internal_Rela
*));
375 /* This function, if defined, is called to swap out a RELA
377 void (*swap_reloca_out
)
378 PARAMS ((bfd
*, const Elf_Internal_Rela
*, bfd_byte
*));
382 #define elf_symbol_from(ABFD,S) \
383 (((S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \
384 && (S)->the_bfd->tdata.elf_obj_data != 0) \
385 ? (elf_symbol_type *) (S) \
388 enum elf_reloc_type_class
{
390 reloc_class_relative
,
395 struct elf_reloc_cookie
397 Elf_Internal_Rela
*rels
, *rel
, *relend
;
403 struct elf_link_hash_entry
**sym_hashes
;
407 /* The level of IRIX compatibility we're striving for. */
415 struct elf_backend_data
417 /* The architecture for this backend. */
418 enum bfd_architecture arch
;
420 /* The ELF machine code (EM_xxxx) for this backend. */
421 int elf_machine_code
;
423 /* The maximum page size for this backend. */
426 /* A function to translate an ELF RELA relocation to a BFD arelent
428 void (*elf_info_to_howto
)
429 PARAMS ((bfd
*, arelent
*, Elf_Internal_Rela
*));
431 /* A function to translate an ELF REL relocation to a BFD arelent
433 void (*elf_info_to_howto_rel
)
434 PARAMS ((bfd
*, arelent
*, Elf_Internal_Rel
*));
436 /* A function to determine whether a symbol is global when
437 partitioning the symbol table into local and global symbols.
438 This should be NULL for most targets, in which case the correct
439 thing will be done. MIPS ELF, at least on the Irix 5, has
440 special requirements. */
441 boolean (*elf_backend_sym_is_global
)
442 PARAMS ((bfd
*, asymbol
*));
444 /* The remaining functions are hooks which are called only if they
447 /* A function to permit a backend specific check on whether a
448 particular BFD format is relevant for an object file, and to
449 permit the backend to set any global information it wishes. When
450 this is called elf_elfheader is set, but anything else should be
451 used with caution. If this returns false, the check_format
452 routine will return a bfd_error_wrong_format error. */
453 boolean (*elf_backend_object_p
)
456 /* A function to do additional symbol processing when reading the
457 ELF symbol table. This is where any processor-specific special
458 section indices are handled. */
459 void (*elf_backend_symbol_processing
)
460 PARAMS ((bfd
*, asymbol
*));
462 /* A function to do additional symbol processing after reading the
463 entire ELF symbol table. */
464 boolean (*elf_backend_symbol_table_processing
)
465 PARAMS ((bfd
*, elf_symbol_type
*, unsigned int));
467 /* A function to set the type of the info field. Processor-specific
468 types should be handled here. */
469 int (*elf_backend_get_symbol_type
)
470 PARAMS (( Elf_Internal_Sym
*, int));
472 /* A function to do additional processing on the ELF section header
473 just before writing it out. This is used to set the flags and
474 type fields for some sections, or to actually write out data for
476 boolean (*elf_backend_section_processing
)
477 PARAMS ((bfd
*, Elf32_Internal_Shdr
*));
479 /* A function to handle unusual section types when creating BFD
480 sections from ELF sections. */
481 boolean (*elf_backend_section_from_shdr
)
482 PARAMS ((bfd
*, Elf32_Internal_Shdr
*, char *));
484 /* A function to convert machine dependent section header flags to
485 BFD internal section header flags. */
486 boolean (*elf_backend_section_flags
)
487 PARAMS ((flagword
*, Elf32_Internal_Shdr
*));
489 /* A function to handle unusual program segment types when creating BFD
490 sections from ELF program segments. */
491 boolean (*elf_backend_section_from_phdr
)
492 PARAMS ((bfd
*, Elf32_Internal_Phdr
*, int));
494 /* A function to set up the ELF section header for a BFD section in
495 preparation for writing it out. This is where the flags and type
496 fields are set for unusual sections. */
497 boolean (*elf_backend_fake_sections
)
498 PARAMS ((bfd
*, Elf32_Internal_Shdr
*, asection
*));
500 /* A function to get the ELF section index for a BFD section. If
501 this returns true, the section was found. If it is a normal ELF
502 section, *RETVAL should be left unchanged. If it is not a normal
503 ELF section *RETVAL should be set to the SHN_xxxx index. */
504 boolean (*elf_backend_section_from_bfd_section
)
505 PARAMS ((bfd
*, asection
*, int *retval
));
507 /* If this field is not NULL, it is called by the add_symbols phase
508 of a link just before adding a symbol to the global linker hash
509 table. It may modify any of the fields as it wishes. If *NAME
510 is set to NULL, the symbol will be skipped rather than being
511 added to the hash table. This function is responsible for
512 handling all processor dependent symbol bindings and section
513 indices, and must set at least *FLAGS and *SEC for each processor
514 dependent case; failure to do so will cause a link error. */
515 boolean (*elf_add_symbol_hook
)
516 PARAMS ((bfd
*abfd
, struct bfd_link_info
*info
,
517 const Elf_Internal_Sym
*, const char **name
,
518 flagword
*flags
, asection
**sec
, bfd_vma
*value
));
520 /* If this field is not NULL, it is called by the elf_link_output_sym
521 phase of a link for each symbol which will appear in the object file. */
522 boolean (*elf_backend_link_output_symbol_hook
)
523 PARAMS ((bfd
*, struct bfd_link_info
*info
, const char *,
524 Elf_Internal_Sym
*, asection
*));
526 /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend
527 linker the first time it encounters a dynamic object in the link.
528 This function must create any sections required for dynamic
529 linking. The ABFD argument is a dynamic object. The .interp,
530 .dynamic, .dynsym, .dynstr, and .hash functions have already been
531 created, and this function may modify the section flags if
532 desired. This function will normally create the .got and .plt
533 sections, but different backends have different requirements. */
534 boolean (*elf_backend_create_dynamic_sections
)
535 PARAMS ((bfd
*abfd
, struct bfd_link_info
*info
));
537 /* The CHECK_RELOCS function is called by the add_symbols phase of
538 the ELF backend linker. It is called once for each section with
539 relocs of an object file, just after the symbols for the object
540 file have been added to the global linker hash table. The
541 function must look through the relocs and do any special handling
542 required. This generally means allocating space in the global
543 offset table, and perhaps allocating space for a reloc. The
544 relocs are always passed as Rela structures; if the section
545 actually uses Rel structures, the r_addend field will always be
547 boolean (*check_relocs
)
548 PARAMS ((bfd
*abfd
, struct bfd_link_info
*info
, asection
*o
,
549 const Elf_Internal_Rela
*relocs
));
551 /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
552 linker for every symbol which is defined by a dynamic object and
553 referenced by a regular object. This is called after all the
554 input files have been seen, but before the SIZE_DYNAMIC_SECTIONS
555 function has been called. The hash table entry should be
556 bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be
557 defined in a section from a dynamic object. Dynamic object
558 sections are not included in the final link, and this function is
559 responsible for changing the value to something which the rest of
560 the link can deal with. This will normally involve adding an
561 entry to the .plt or .got or some such section, and setting the
562 symbol to point to that. */
563 boolean (*elf_backend_adjust_dynamic_symbol
)
564 PARAMS ((struct bfd_link_info
*info
, struct elf_link_hash_entry
*h
));
566 /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker
567 after all the linker input files have been seen but before the
568 section sizes have been set. This is called after
569 ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS. */
570 boolean (*elf_backend_always_size_sections
)
571 PARAMS ((bfd
*output_bfd
, struct bfd_link_info
*info
));
573 /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend
574 linker after all the linker input files have been seen but before
575 the sections sizes have been set. This is called after
576 ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols.
577 It is only called when linking against a dynamic object. It must
578 set the sizes of the dynamic sections, and may fill in their
579 contents as well. The generic ELF linker can handle the .dynsym,
580 .dynstr and .hash sections. This function must handle the
581 .interp section and any sections created by the
582 CREATE_DYNAMIC_SECTIONS entry point. */
583 boolean (*elf_backend_size_dynamic_sections
)
584 PARAMS ((bfd
*output_bfd
, struct bfd_link_info
*info
));
586 /* The RELOCATE_SECTION function is called by the ELF backend linker
587 to handle the relocations for a section.
589 The relocs are always passed as Rela structures; if the section
590 actually uses Rel structures, the r_addend field will always be
593 This function is responsible for adjust the section contents as
594 necessary, and (if using Rela relocs and generating a
595 relocateable output file) adjusting the reloc addend as
598 This function does not have to worry about setting the reloc
599 address or the reloc symbol index.
601 LOCAL_SYMS is a pointer to the swapped in local symbols.
603 LOCAL_SECTIONS is an array giving the section in the input file
604 corresponding to the st_shndx field of each local symbol.
606 The global hash table entry for the global symbols can be found
607 via elf_sym_hashes (input_bfd).
609 When generating relocateable output, this function must handle
610 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
611 going to be the section symbol corresponding to the output
612 section, which means that the addend must be adjusted
614 boolean (*elf_backend_relocate_section
)
615 PARAMS ((bfd
*output_bfd
, struct bfd_link_info
*info
,
616 bfd
*input_bfd
, asection
*input_section
, bfd_byte
*contents
,
617 Elf_Internal_Rela
*relocs
, Elf_Internal_Sym
*local_syms
,
618 asection
**local_sections
));
620 /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend
621 linker just before it writes a symbol out to the .dynsym section.
622 The processor backend may make any required adjustment to the
623 symbol. It may also take the opportunity to set contents of the
624 dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on
625 all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called
626 on those symbols which are defined by a dynamic object. */
627 boolean (*elf_backend_finish_dynamic_symbol
)
628 PARAMS ((bfd
*output_bfd
, struct bfd_link_info
*info
,
629 struct elf_link_hash_entry
*h
, Elf_Internal_Sym
*sym
));
631 /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend
632 linker just before it writes all the dynamic sections out to the
633 output file. The FINISH_DYNAMIC_SYMBOL will have been called on
634 all dynamic symbols. */
635 boolean (*elf_backend_finish_dynamic_sections
)
636 PARAMS ((bfd
*output_bfd
, struct bfd_link_info
*info
));
638 /* A function to do any beginning processing needed for the ELF file
639 before building the ELF headers and computing file positions. */
640 void (*elf_backend_begin_write_processing
)
641 PARAMS ((bfd
*, struct bfd_link_info
*));
643 /* A function to do any final processing needed for the ELF file
644 before writing it out. The LINKER argument is true if this BFD
645 was created by the ELF backend linker. */
646 void (*elf_backend_final_write_processing
)
647 PARAMS ((bfd
*, boolean linker
));
649 /* This function is called by get_program_header_size. It should
650 return the number of additional program segments which this BFD
651 will need. It should return -1 on error. */
652 int (*elf_backend_additional_program_headers
)
655 /* This function is called to modify an existing segment map in a
656 backend specific fashion. */
657 boolean (*elf_backend_modify_segment_map
)
660 /* This function is called during section gc to discover the section a
661 particular relocation refers to. It need not be defined for hosts
662 that have no queer relocation types. */
663 asection
* (*gc_mark_hook
)
664 PARAMS ((bfd
*abfd
, struct bfd_link_info
*, Elf_Internal_Rela
*,
665 struct elf_link_hash_entry
*h
, Elf_Internal_Sym
*));
667 /* This function, if defined, is called during the sweep phase of gc
668 in order that a backend might update any data structures it might
670 boolean (*gc_sweep_hook
)
671 PARAMS ((bfd
*abfd
, struct bfd_link_info
*info
, asection
*o
,
672 const Elf_Internal_Rela
*relocs
));
674 /* This function, if defined, is called after the ELF headers have
675 been created. This allows for things like the OS and ABI versions
677 void (*elf_backend_post_process_headers
)
678 PARAMS ((bfd
*, struct bfd_link_info
*));
680 /* This function, if defined, prints a symbol to file and returns the
681 name of the symbol to be printed. It should return NULL to fall
682 back to default symbol printing. */
683 const char *(*elf_backend_print_symbol_all
)
684 PARAMS ((bfd
*, PTR
, asymbol
*));
686 /* This function, if defined, is called after all local symbols and
687 global symbols converted to locals are emited into the symtab
688 section. It allows the backend to emit special global symbols
689 not handled in the hash table. */
690 boolean (*elf_backend_output_arch_syms
)
691 PARAMS ((bfd
*, struct bfd_link_info
*, PTR
,
692 boolean (*) (PTR
, const char *, Elf_Internal_Sym
*, asection
*)));
694 /* Copy any information related to dynamic linking from a pre-existing
695 symbol to a newly created symbol. Also called to copy flags and
696 other back-end info to a weakdef, in which case the symbol is not
697 newly created and plt/got refcounts and dynamic indices should not
699 void (*elf_backend_copy_indirect_symbol
)
700 PARAMS ((struct elf_link_hash_entry
*, struct elf_link_hash_entry
*));
702 /* Modify any information related to dynamic linking such that the
703 symbol is not exported. */
704 void (*elf_backend_hide_symbol
)
705 PARAMS ((struct bfd_link_info
*, struct elf_link_hash_entry
*, boolean
));
707 /* Emit relocations. Overrides default routine for emitting relocs,
708 except during a relocatable link, or if all relocs are being emitted. */
709 void (*elf_backend_emit_relocs
)
710 PARAMS ((bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*));
712 /* Count relocations. Not called for relocatable links
713 or if all relocs are being preserved in the output. */
714 unsigned int (*elf_backend_count_relocs
)
715 PARAMS ((asection
*, Elf_Internal_Rela
*));
717 /* This function, if defined, is called when an NT_PRSTATUS note is found
719 boolean (*elf_backend_grok_prstatus
)
720 PARAMS ((bfd
*, Elf_Internal_Note
*));
722 /* This function, if defined, is called when an NT_PSINFO or NT_PRPSINFO
723 note is found in a core file. */
724 boolean (*elf_backend_grok_psinfo
)
725 PARAMS ((bfd
*, Elf_Internal_Note
*));
727 /* Functions to print VMAs. Special code to handle 64 bit ELF files. */
728 void (* elf_backend_sprintf_vma
)
729 PARAMS ((bfd
*, char *, bfd_vma
));
730 void (* elf_backend_fprintf_vma
)
731 PARAMS ((bfd
*, PTR
, bfd_vma
));
733 /* This function returns class of a reloc type. */
734 enum elf_reloc_type_class (*elf_backend_reloc_type_class
)
735 PARAMS ((const Elf_Internal_Rela
*));
737 /* This function, if defined, removes information about discarded functions
738 from other sections which mention them. */
739 boolean (*elf_backend_discard_info
)
740 PARAMS ((bfd
*, struct elf_reloc_cookie
*, struct bfd_link_info
*));
742 /* This function, if defined, signals that the function above has removed
743 the discarded relocations for this section. */
744 boolean (*elf_backend_ignore_discarded_relocs
)
745 PARAMS ((asection
*));
747 /* This function, if defined, may write out the given section.
748 Returns true if it did so and false if the caller should. */
749 boolean (*elf_backend_write_section
)
750 PARAMS ((bfd
*, asection
*, bfd_byte
*));
752 /* The level of IRIX compatibility we're striving for.
753 MIPS ELF specific function. */
754 irix_compat_t (*elf_backend_mips_irix_compat
)
757 reloc_howto_type
*(*elf_backend_mips_rtype_to_howto
)
758 PARAMS ((unsigned int, boolean
));
760 /* The swapping table to use when dealing with ECOFF information.
761 Used for the MIPS ELF .mdebug section. */
762 const struct ecoff_debug_swap
*elf_backend_ecoff_debug_swap
;
764 /* Alternate EM_xxxx machine codes for this backend. */
765 int elf_machine_alt1
;
766 int elf_machine_alt2
;
768 const struct elf_size_info
*s
;
770 /* offset of the _GLOBAL_OFFSET_TABLE_ symbol from the start of the
772 bfd_vma got_symbol_offset
;
774 /* The size in bytes of the headers for the GOT and PLT. This includes
775 the so-called reserved entries on some systems. */
776 bfd_vma got_header_size
;
777 bfd_vma plt_header_size
;
779 /* This is true if the linker should act like collect and gather
780 global constructors and destructors by name. This is true for
781 MIPS ELF because the Irix 5 tools can not handle the .init
783 unsigned collect
: 1;
785 /* This is true if the linker should ignore changes to the type of a
786 symbol. This is true for MIPS ELF because some Irix 5 objects
787 record undefined functions as STT_OBJECT although the definitions
789 unsigned type_change_ok
: 1;
791 /* Whether the backend may use REL relocations. (Some backends use
792 both REL and RELA relocations, and this flag is set for those
794 unsigned may_use_rel_p
: 1;
796 /* Whether the backend may use RELA relocations. (Some backends use
797 both REL and RELA relocations, and this flag is set for those
799 unsigned may_use_rela_p
: 1;
801 /* Whether the default relocation type is RELA. If a backend with
802 this flag set wants REL relocations for a particular section,
803 it must note that explicitly. Similarly, if this flag is clear,
804 and the backend wants RELA relocations for a particular
806 unsigned default_use_rela_p
: 1;
808 /* Set if RELA relocations for a relocatable link can be handled by
809 generic code. Backends that set this flag need do nothing in the
810 backend relocate_section routine for relocatable linking. */
811 unsigned rela_normal
: 1;
813 /* True if addresses "naturally" sign extend. This is used when
814 swapping in from Elf32 when BFD64. */
815 unsigned sign_extend_vma
: 1;
817 unsigned want_got_plt
: 1;
818 unsigned plt_readonly
: 1;
819 unsigned want_plt_sym
: 1;
820 unsigned plt_not_loaded
: 1;
821 unsigned plt_alignment
: 4;
822 unsigned can_gc_sections
: 1;
823 unsigned can_refcount
: 1;
824 unsigned want_got_sym
: 1;
825 unsigned want_dynbss
: 1;
828 /* Information stored for each BFD section in an ELF file. This
829 structure is allocated by elf_new_section_hook. */
831 struct bfd_elf_section_data
833 /* The ELF header for this section. */
834 Elf_Internal_Shdr this_hdr
;
836 /* The ELF header for the reloc section associated with this
838 Elf_Internal_Shdr rel_hdr
;
840 /* If there is a second reloc section associated with this section,
841 as can happen on Irix 6, this field points to the header. */
842 Elf_Internal_Shdr
*rel_hdr2
;
844 /* The number of relocations currently assigned to REL_HDR. */
845 unsigned int rel_count
;
847 /* The number of relocations currently assigned to REL_HDR2. */
848 unsigned int rel_count2
;
850 /* A pointer to a linked list tracking dynamic relocs copied for
854 /* A pointer to the bfd section used for dynamic relocs. */
857 /* The ELF section number of this section. Only used for an output
861 /* The ELF section number of the reloc section indicated by
862 REL_HDR if any. Only used for an output file. */
865 /* The ELF section number of the reloc section indicated by
866 REL_HDR2 if any. Only used for an output file. */
869 /* Used by the backend linker to store the symbol hash table entries
870 associated with relocs against global symbols. */
871 struct elf_link_hash_entry
**rel_hashes
;
873 /* A pointer to the swapped relocs. If the section uses REL relocs,
874 rather than RELA, all the r_addend fields will be zero. This
875 pointer may be NULL. It is used by the backend linker. */
876 Elf_Internal_Rela
*relocs
;
878 /* Used by the backend linker when generating a shared library to
879 record the dynamic symbol index for a section symbol
880 corresponding to this section. A value of 0 means that there is
881 no dynamic symbol for this section. */
884 /* A pointer used for various section optimizations. */
887 /* Type of that information. */
888 enum elf_link_info_type sec_info_type
;
890 /* Group name, if this section is part of a group. */
891 const char *group_name
;
893 /* A linked list of sections in the group. Circular when used by
895 asection
*next_in_group
;
897 /* A pointer available for the processor specific ELF backend. */
900 /* Nonzero if this section uses RELA relocations, rather than REL. */
901 unsigned int use_rela_p
:1;
904 #define elf_section_data(sec) ((struct bfd_elf_section_data*)sec->used_by_bfd)
905 #define elf_group_name(sec) (elf_section_data(sec)->group_name)
906 #define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group)
908 /* Return true if section has been discarded. */
909 #define elf_discarded_section(sec) \
910 (!bfd_is_abs_section(sec) \
911 && bfd_is_abs_section((sec)->output_section) \
912 && elf_section_data (sec)->sec_info_type != ELF_INFO_TYPE_MERGE \
913 && elf_section_data (sec)->sec_info_type != ELF_INFO_TYPE_JUST_SYMS)
915 #define get_elf_backend_data(abfd) \
916 ((struct elf_backend_data *) (abfd)->xvec->backend_data)
918 /* Enumeration to specify the special section. */
919 typedef enum elf_linker_section_enum
921 LINKER_SECTION_UNKNOWN
, /* not used */
922 LINKER_SECTION_GOT
, /* .got section for global offset pointers */
923 LINKER_SECTION_PLT
, /* .plt section for generated procedure stubs */
924 LINKER_SECTION_SDATA
, /* .sdata/.sbss section for PowerPC */
925 LINKER_SECTION_SDATA2
, /* .sdata2/.sbss2 section for PowerPC */
926 LINKER_SECTION_MAX
/* # of linker sections */
927 } elf_linker_section_enum_t
;
929 /* Sections created by the linker. */
931 typedef struct elf_linker_section
933 char *name
; /* name of the section */
934 char *rel_name
; /* name of the associated .rel{,a}. section */
935 char *bss_name
; /* name of a related .bss section */
936 char *sym_name
; /* name of symbol to reference this section */
937 asection
*section
; /* pointer to the section */
938 asection
*bss_section
; /* pointer to the bss section associated with this */
939 asection
*rel_section
; /* pointer to the relocations needed for this section */
940 struct elf_link_hash_entry
*sym_hash
; /* pointer to the created symbol hash value */
941 bfd_vma initial_size
; /* initial size before any linker generated allocations */
942 bfd_vma sym_offset
; /* offset of symbol from beginning of section */
943 bfd_vma hole_size
; /* size of reserved address hole in allocation */
944 bfd_vma hole_offset
; /* current offset for the hole */
945 bfd_vma max_hole_offset
; /* maximum offset for the hole */
946 elf_linker_section_enum_t which
; /* which section this is */
947 boolean hole_written_p
; /* whether the hole has been initialized */
948 unsigned int alignment
; /* alignment for the section */
949 flagword flags
; /* flags to use to create the section */
950 } elf_linker_section_t
;
952 /* Linked list of allocated pointer entries. This hangs off of the symbol lists, and
953 provides allows us to return different pointers, based on different addend's. */
955 typedef struct elf_linker_section_pointers
957 struct elf_linker_section_pointers
*next
; /* next allocated pointer for this symbol */
958 bfd_vma offset
; /* offset of pointer from beginning of section */
959 bfd_vma addend
; /* addend used */
960 elf_linker_section_enum_t which
; /* which linker section this is */
961 boolean written_address_p
; /* whether address was written yet */
962 } elf_linker_section_pointers_t
;
964 /* Some private data is stashed away for future use using the tdata pointer
965 in the bfd structure. */
969 Elf_Internal_Ehdr elf_header
[1]; /* Actual data, but ref like ptr */
970 Elf_Internal_Shdr
**elf_sect_ptr
;
971 Elf_Internal_Phdr
*phdr
;
972 struct elf_segment_map
*segment_map
;
973 struct elf_strtab_hash
*strtab_ptr
;
976 unsigned int num_elf_sections
; /* elf_sect_ptr size */
977 int num_section_syms
;
978 asymbol
**section_syms
; /* STT_SECTION symbols for each section */
979 Elf_Internal_Shdr symtab_hdr
;
980 Elf_Internal_Shdr shstrtab_hdr
;
981 Elf_Internal_Shdr strtab_hdr
;
982 Elf_Internal_Shdr dynsymtab_hdr
;
983 Elf_Internal_Shdr dynstrtab_hdr
;
984 Elf_Internal_Shdr dynversym_hdr
;
985 Elf_Internal_Shdr dynverref_hdr
;
986 Elf_Internal_Shdr dynverdef_hdr
;
987 Elf_Internal_Shdr symtab_shndx_hdr
;
988 unsigned int symtab_section
, shstrtab_section
;
989 unsigned int strtab_section
, dynsymtab_section
;
990 unsigned int symtab_shndx_section
;
991 unsigned int dynversym_section
, dynverdef_section
, dynverref_section
;
992 file_ptr next_file_pos
;
994 /* we don't need these inside bfd anymore, and I think
995 these weren't used outside bfd. */
996 void *prstatus
; /* The raw /proc prstatus structure */
997 void *prpsinfo
; /* The raw /proc prpsinfo structure */
999 bfd_vma gp
; /* The gp value */
1000 unsigned int gp_size
; /* The gp size */
1002 Elf_Internal_Shdr
**group_sect_ptr
;
1005 /* Information grabbed from an elf core file. */
1012 /* This is set to true if the object was created by the backend
1016 /* A mapping from external symbols to entries in the linker hash
1017 table, used when linking. This is indexed by the symbol index
1018 minus the sh_info field of the symbol table header. */
1019 struct elf_link_hash_entry
**sym_hashes
;
1021 /* A mapping from local symbols to offsets into the global offset
1022 table, used when linking. This is indexed by the symbol index.
1023 Like for the globals, we use a union and two names primarily to
1024 document the intent of any particular piece of code. The field
1025 should be used as a count until size_dynamic_sections, at which
1026 point the contents of the .got is fixed. Afterward, if an entry
1027 is -1, then the symbol does not require a global offset table entry. */
1030 bfd_signed_vma
*refcounts
;
1034 /* A mapping from local symbols to offsets into the various linker
1035 sections added. This is index by the symbol index. */
1036 elf_linker_section_pointers_t
**linker_section_pointers
;
1038 /* The linker ELF emulation code needs to let the backend ELF linker
1039 know what filename should be used for a dynamic object if the
1040 dynamic object is found using a search. The emulation code then
1041 sometimes needs to know what name was actually used. Until the
1042 file has been added to the linker symbol table, this field holds
1043 the name the linker wants. After it has been added, it holds the
1044 name actually used, which will be the DT_SONAME entry if there is
1046 const char *dt_name
;
1048 /* When a reference in a regular object is resolved by a shared
1049 object is loaded into via the DT_NEEDED entries by the linker
1050 ELF emulation code, we need to add the shared object to the
1051 DT_NEEDED list of the resulting binary to indicate the dependency
1052 as if the -l option is passed to the linker. This field holds the
1053 name of the loaded shared object. */
1054 const char *dt_soname
;
1056 /* Irix 5 often screws up the symbol table, sorting local symbols
1057 after global symbols. This flag is set if the symbol table in
1058 this BFD appears to be screwed up. If it is, we ignore the
1059 sh_info field in the symbol table header, and always read all the
1063 /* Records the result of `get_program_header_size'. */
1064 bfd_size_type program_header_size
;
1066 /* Used by find_nearest_line entry point. */
1069 /* Used by MIPS ELF find_nearest_line entry point. The structure
1070 could be included directly in this one, but there's no point to
1071 wasting the memory just for the infrequently called
1072 find_nearest_line. */
1073 struct mips_elf_find_line
*find_line_info
;
1075 /* A place to stash dwarf1 info for this bfd. */
1076 struct dwarf1_debug
*dwarf1_find_line_info
;
1078 /* A place to stash dwarf2 info for this bfd. */
1079 PTR dwarf2_find_line_info
;
1081 /* An array of stub sections indexed by symbol number, used by the
1082 MIPS ELF linker. FIXME: We should figure out some way to only
1083 include this field for a MIPS ELF target. */
1084 asection
**local_stubs
;
1086 /* Used to determine if the e_flags field has been initialized */
1089 /* Used to determine if PT_GNU_EH_FRAME segment header should be
1091 boolean eh_frame_hdr
;
1093 /* Number of symbol version definitions we are about to emit. */
1094 unsigned int cverdefs
;
1096 /* Number of symbol version references we are about to emit. */
1097 unsigned int cverrefs
;
1099 /* Symbol version definitions in external objects. */
1100 Elf_Internal_Verdef
*verdef
;
1102 /* Symbol version references to external objects. */
1103 Elf_Internal_Verneed
*verref
;
1105 /* Linker sections that we are interested in. */
1106 struct elf_linker_section
*linker_section
[ (int)LINKER_SECTION_MAX
];
1108 /* The Irix 5 support uses two virtual sections, which represent
1109 text/data symbols defined in dynamic objects. */
1110 asymbol
*elf_data_symbol
;
1111 asymbol
*elf_text_symbol
;
1112 asection
*elf_data_section
;
1113 asection
*elf_text_section
;
1116 #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
1117 #define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header)
1118 #define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr)
1119 #define elf_numsections(bfd) (elf_tdata(bfd) -> num_elf_sections)
1120 #define elf_shstrtab(bfd) (elf_tdata(bfd) -> strtab_ptr)
1121 #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section)
1122 #define elf_symtab_shndx(bfd) (elf_tdata(bfd) -> symtab_shndx_section)
1123 #define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section)
1124 #define elf_dynversym(bfd) (elf_tdata(bfd) -> dynversym_section)
1125 #define elf_dynverdef(bfd) (elf_tdata(bfd) -> dynverdef_section)
1126 #define elf_dynverref(bfd) (elf_tdata(bfd) -> dynverref_section)
1127 #define elf_num_locals(bfd) (elf_tdata(bfd) -> num_locals)
1128 #define elf_num_globals(bfd) (elf_tdata(bfd) -> num_globals)
1129 #define elf_section_syms(bfd) (elf_tdata(bfd) -> section_syms)
1130 #define elf_num_section_syms(bfd) (elf_tdata(bfd) -> num_section_syms)
1131 #define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
1132 #define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
1133 #define elf_gp(bfd) (elf_tdata(bfd) -> gp)
1134 #define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size)
1135 #define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes)
1136 #define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts)
1137 #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets)
1138 #define elf_local_ptr_offsets(bfd) (elf_tdata(bfd) -> linker_section_pointers)
1139 #define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name)
1140 #define elf_dt_soname(bfd) (elf_tdata(bfd) -> dt_soname)
1141 #define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab)
1142 #define elf_flags_init(bfd) (elf_tdata(bfd) -> flags_init)
1143 #define elf_linker_section(bfd,n) (elf_tdata(bfd) -> linker_section[(int)n])
1145 extern void _bfd_elf_swap_verdef_in
1146 PARAMS ((bfd
*, const Elf_External_Verdef
*, Elf_Internal_Verdef
*));
1147 extern void _bfd_elf_swap_verdef_out
1148 PARAMS ((bfd
*, const Elf_Internal_Verdef
*, Elf_External_Verdef
*));
1149 extern void _bfd_elf_swap_verdaux_in
1150 PARAMS ((bfd
*, const Elf_External_Verdaux
*, Elf_Internal_Verdaux
*));
1151 extern void _bfd_elf_swap_verdaux_out
1152 PARAMS ((bfd
*, const Elf_Internal_Verdaux
*, Elf_External_Verdaux
*));
1153 extern void _bfd_elf_swap_verneed_in
1154 PARAMS ((bfd
*, const Elf_External_Verneed
*, Elf_Internal_Verneed
*));
1155 extern void _bfd_elf_swap_verneed_out
1156 PARAMS ((bfd
*, const Elf_Internal_Verneed
*, Elf_External_Verneed
*));
1157 extern void _bfd_elf_swap_vernaux_in
1158 PARAMS ((bfd
*, const Elf_External_Vernaux
*, Elf_Internal_Vernaux
*));
1159 extern void _bfd_elf_swap_vernaux_out
1160 PARAMS ((bfd
*, const Elf_Internal_Vernaux
*, Elf_External_Vernaux
*));
1161 extern void _bfd_elf_swap_versym_in
1162 PARAMS ((bfd
*, const Elf_External_Versym
*, Elf_Internal_Versym
*));
1163 extern void _bfd_elf_swap_versym_out
1164 PARAMS ((bfd
*, const Elf_Internal_Versym
*, Elf_External_Versym
*));
1166 extern int _bfd_elf_section_from_bfd_section
1167 PARAMS ((bfd
*, asection
*));
1168 extern char *bfd_elf_string_from_elf_section
1169 PARAMS ((bfd
*, unsigned, unsigned));
1170 extern char *bfd_elf_get_str_section
1171 PARAMS ((bfd
*, unsigned));
1173 extern boolean _bfd_elf_copy_private_bfd_data
1174 PARAMS ((bfd
*, bfd
*));
1175 extern boolean _bfd_elf_print_private_bfd_data
1176 PARAMS ((bfd
*, PTR
));
1177 extern void bfd_elf_print_symbol
1178 PARAMS ((bfd
*, PTR
, asymbol
*, bfd_print_symbol_type
));
1180 #define elf_string_from_elf_strtab(abfd, strindex) \
1181 bfd_elf_string_from_elf_section(abfd, elf_elfheader(abfd)->e_shstrndx, \
1184 #define bfd_elf32_print_symbol bfd_elf_print_symbol
1185 #define bfd_elf64_print_symbol bfd_elf_print_symbol
1187 extern void _bfd_elf_sprintf_vma
1188 PARAMS ((bfd
*, char *, bfd_vma
));
1189 extern void _bfd_elf_fprintf_vma
1190 PARAMS ((bfd
*, PTR
, bfd_vma
));
1192 extern enum elf_reloc_type_class _bfd_elf_reloc_type_class
1193 PARAMS ((const Elf_Internal_Rela
*));
1194 extern bfd_vma _bfd_elf_rela_local_sym
1195 PARAMS ((bfd
*, Elf_Internal_Sym
*, asection
*, Elf_Internal_Rela
*));
1196 extern bfd_vma _bfd_elf_rel_local_sym
1197 PARAMS ((bfd
*, Elf_Internal_Sym
*, asection
**, bfd_vma
));
1198 extern bfd_vma _bfd_elf_section_offset
1199 PARAMS ((bfd
*, struct bfd_link_info
*, asection
*, bfd_vma
));
1201 extern unsigned long bfd_elf_hash
1202 PARAMS ((const char *));
1204 extern bfd_reloc_status_type bfd_elf_generic_reloc
1205 PARAMS ((bfd
*, arelent
*, asymbol
*, PTR
, asection
*, bfd
*, char **));
1206 extern boolean bfd_elf_mkobject
1208 extern boolean bfd_elf_mkcorefile
1210 extern Elf_Internal_Shdr
*bfd_elf_find_section
1211 PARAMS ((bfd
*, char *));
1212 extern boolean _bfd_elf_make_section_from_shdr
1213 PARAMS ((bfd
*, Elf_Internal_Shdr
*, const char *));
1214 extern boolean _bfd_elf_make_section_from_phdr
1215 PARAMS ((bfd
*, Elf_Internal_Phdr
*, int, const char *));
1216 extern struct bfd_hash_entry
*_bfd_elf_link_hash_newfunc
1217 PARAMS ((struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *));
1218 extern struct bfd_link_hash_table
*_bfd_elf_link_hash_table_create
1220 extern void _bfd_elf_link_hash_copy_indirect
1221 PARAMS ((struct elf_link_hash_entry
*, struct elf_link_hash_entry
*));
1222 extern void _bfd_elf_link_hash_hide_symbol
1223 PARAMS ((struct bfd_link_info
*, struct elf_link_hash_entry
*, boolean
));
1224 extern boolean _bfd_elf_link_hash_table_init
1225 PARAMS ((struct elf_link_hash_table
*, bfd
*,
1226 struct bfd_hash_entry
*(*) (struct bfd_hash_entry
*,
1227 struct bfd_hash_table
*,
1229 extern boolean _bfd_elf_slurp_version_tables
1231 extern boolean _bfd_elf_merge_sections
1232 PARAMS ((bfd
*, struct bfd_link_info
*));
1233 extern void _bfd_elf_link_just_syms
1234 PARAMS ((asection
*, struct bfd_link_info
*));
1235 extern boolean _bfd_elf_copy_private_symbol_data
1236 PARAMS ((bfd
*, asymbol
*, bfd
*, asymbol
*));
1237 extern boolean _bfd_elf_copy_private_section_data
1238 PARAMS ((bfd
*, asection
*, bfd
*, asection
*));
1239 extern boolean _bfd_elf_write_object_contents
1241 extern boolean _bfd_elf_write_corefile_contents
1243 extern boolean _bfd_elf_set_section_contents
1244 PARAMS ((bfd
*, sec_ptr
, PTR
, file_ptr
, bfd_size_type
));
1245 extern long _bfd_elf_get_symtab_upper_bound
1247 extern long _bfd_elf_get_symtab
1248 PARAMS ((bfd
*, asymbol
**));
1249 extern long _bfd_elf_get_dynamic_symtab_upper_bound
1251 extern long _bfd_elf_canonicalize_dynamic_symtab
1252 PARAMS ((bfd
*, asymbol
**));
1253 extern long _bfd_elf_get_reloc_upper_bound
1254 PARAMS ((bfd
*, sec_ptr
));
1255 extern long _bfd_elf_canonicalize_reloc
1256 PARAMS ((bfd
*, sec_ptr
, arelent
**, asymbol
**));
1257 extern long _bfd_elf_get_dynamic_reloc_upper_bound
1259 extern long _bfd_elf_canonicalize_dynamic_reloc
1260 PARAMS ((bfd
*, arelent
**, asymbol
**));
1261 extern asymbol
*_bfd_elf_make_empty_symbol
1263 extern void _bfd_elf_get_symbol_info
1264 PARAMS ((bfd
*, asymbol
*, symbol_info
*));
1265 extern boolean _bfd_elf_is_local_label_name
1266 PARAMS ((bfd
*, const char *));
1267 extern alent
*_bfd_elf_get_lineno
1268 PARAMS ((bfd
*, asymbol
*));
1269 extern boolean _bfd_elf_set_arch_mach
1270 PARAMS ((bfd
*, enum bfd_architecture
, unsigned long));
1271 extern boolean _bfd_elf_find_nearest_line
1272 PARAMS ((bfd
*, asection
*, asymbol
**, bfd_vma
, const char **,
1273 const char **, unsigned int *));
1274 #define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols
1275 #define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
1276 extern int _bfd_elf_sizeof_headers
1277 PARAMS ((bfd
*, boolean
));
1278 extern boolean _bfd_elf_new_section_hook
1279 PARAMS ((bfd
*, asection
*));
1280 extern boolean _bfd_elf_init_reloc_shdr
1281 PARAMS ((bfd
*, Elf_Internal_Shdr
*, asection
*, boolean
));
1283 /* If the target doesn't have reloc handling written yet: */
1284 extern void _bfd_elf_no_info_to_howto
1285 PARAMS ((bfd
*, arelent
*, Elf_Internal_Rela
*));
1287 extern boolean bfd_section_from_shdr
1288 PARAMS ((bfd
*, unsigned int shindex
));
1289 extern boolean bfd_section_from_phdr
1290 PARAMS ((bfd
*, Elf_Internal_Phdr
*, int));
1292 extern int _bfd_elf_symbol_from_bfd_symbol
1293 PARAMS ((bfd
*, asymbol
**));
1295 extern asection
*bfd_section_from_r_symndx
1296 PARAMS ((bfd
*, struct sym_sec_cache
*, asection
*, unsigned long));
1297 extern asection
*bfd_section_from_elf_index
1298 PARAMS ((bfd
*, unsigned int));
1299 extern boolean _bfd_elf_create_dynamic_sections
1300 PARAMS ((bfd
*, struct bfd_link_info
*));
1301 extern struct bfd_strtab_hash
*_bfd_elf_stringtab_init
1304 extern struct elf_strtab_hash
* _bfd_elf_strtab_init
1306 extern void _bfd_elf_strtab_free
1307 PARAMS ((struct elf_strtab_hash
*));
1308 extern bfd_size_type _bfd_elf_strtab_add
1309 PARAMS ((struct elf_strtab_hash
*, const char *, boolean
));
1310 extern void _bfd_elf_strtab_addref
1311 PARAMS ((struct elf_strtab_hash
*, bfd_size_type
));
1312 extern void _bfd_elf_strtab_delref
1313 PARAMS ((struct elf_strtab_hash
*, bfd_size_type
));
1314 extern void _bfd_elf_strtab_clear_all_refs
1315 PARAMS ((struct elf_strtab_hash
*));
1316 extern bfd_size_type _bfd_elf_strtab_size
1317 PARAMS ((struct elf_strtab_hash
*));
1318 extern bfd_size_type _bfd_elf_strtab_offset
1319 PARAMS ((struct elf_strtab_hash
*, bfd_size_type
));
1320 extern boolean _bfd_elf_strtab_emit
1321 PARAMS ((bfd
*, struct elf_strtab_hash
*));
1322 extern void _bfd_elf_strtab_finalize
1323 PARAMS ((struct elf_strtab_hash
*));
1325 extern boolean _bfd_elf_discard_section_eh_frame
1326 PARAMS ((bfd
*, struct bfd_link_info
*, asection
*, asection
*,
1327 boolean (*) (bfd_vma
, PTR
), struct elf_reloc_cookie
*));
1328 extern boolean _bfd_elf_discard_section_eh_frame_hdr
1329 PARAMS ((bfd
*, struct bfd_link_info
*, asection
*));
1330 extern bfd_vma _bfd_elf_eh_frame_section_offset
1331 PARAMS ((bfd
*, asection
*, bfd_vma
));
1332 extern boolean _bfd_elf_write_section_eh_frame
1333 PARAMS ((bfd
*, asection
*, asection
*, bfd_byte
*));
1334 extern boolean _bfd_elf_write_section_eh_frame_hdr
1335 PARAMS ((bfd
*, asection
*));
1336 extern boolean _bfd_elf_maybe_strip_eh_frame_hdr
1337 PARAMS ((struct bfd_link_info
*));
1339 extern boolean _bfd_elf_link_record_dynamic_symbol
1340 PARAMS ((struct bfd_link_info
*, struct elf_link_hash_entry
*));
1341 extern long _bfd_elf_link_lookup_local_dynindx
1342 PARAMS ((struct bfd_link_info
*, bfd
*, long));
1343 extern boolean _bfd_elf_compute_section_file_positions
1344 PARAMS ((bfd
*, struct bfd_link_info
*));
1345 extern void _bfd_elf_assign_file_positions_for_relocs
1347 extern file_ptr _bfd_elf_assign_file_position_for_section
1348 PARAMS ((Elf_Internal_Shdr
*, file_ptr
, boolean
));
1350 extern boolean _bfd_elf_validate_reloc
1351 PARAMS ((bfd
*, arelent
*));
1353 extern boolean _bfd_elf_create_dynamic_sections
1354 PARAMS ((bfd
*, struct bfd_link_info
*));
1355 extern boolean _bfd_elf_create_got_section
1356 PARAMS ((bfd
*, struct bfd_link_info
*));
1357 extern unsigned long _bfd_elf_link_renumber_dynsyms
1358 PARAMS ((bfd
*, struct bfd_link_info
*));
1360 extern boolean _bfd_elfcore_make_pseudosection
1361 PARAMS ((bfd
*, char *, size_t, ufile_ptr
));
1362 extern char *_bfd_elfcore_strndup
1363 PARAMS ((bfd
*, char *, size_t));
1365 extern elf_linker_section_t
*_bfd_elf_create_linker_section
1366 PARAMS ((bfd
*, struct bfd_link_info
*, enum elf_linker_section_enum
,
1367 elf_linker_section_t
*));
1369 extern elf_linker_section_pointers_t
*_bfd_elf_find_pointer_linker_section
1370 PARAMS ((elf_linker_section_pointers_t
*, bfd_vma
,
1371 elf_linker_section_enum_t
));
1373 extern boolean bfd_elf32_create_pointer_linker_section
1374 PARAMS ((bfd
*, struct bfd_link_info
*, elf_linker_section_t
*,
1375 struct elf_link_hash_entry
*, const Elf32_Internal_Rela
*));
1377 extern bfd_vma bfd_elf32_finish_pointer_linker_section
1378 PARAMS ((bfd
*, bfd
*, struct bfd_link_info
*, elf_linker_section_t
*,
1379 struct elf_link_hash_entry
*, bfd_vma
,
1380 const Elf32_Internal_Rela
*, int));
1382 extern boolean bfd_elf64_create_pointer_linker_section
1383 PARAMS ((bfd
*, struct bfd_link_info
*, elf_linker_section_t
*,
1384 struct elf_link_hash_entry
*, const Elf64_Internal_Rela
*));
1386 extern bfd_vma bfd_elf64_finish_pointer_linker_section
1387 PARAMS ((bfd
*, bfd
*, struct bfd_link_info
*, elf_linker_section_t
*,
1388 struct elf_link_hash_entry
*, bfd_vma
,
1389 const Elf64_Internal_Rela
*, int));
1391 extern boolean _bfd_elf_make_linker_section_rela
1392 PARAMS ((bfd
*, elf_linker_section_t
*, int));
1394 extern const bfd_target
*bfd_elf32_object_p
1396 extern const bfd_target
*bfd_elf32_core_file_p
1398 extern char *bfd_elf32_core_file_failing_command
1400 extern int bfd_elf32_core_file_failing_signal
1402 extern boolean bfd_elf32_core_file_matches_executable_p
1403 PARAMS ((bfd
*, bfd
*));
1405 extern boolean bfd_elf32_bfd_link_add_symbols
1406 PARAMS ((bfd
*, struct bfd_link_info
*));
1407 extern boolean bfd_elf32_bfd_final_link
1408 PARAMS ((bfd
*, struct bfd_link_info
*));
1410 extern void bfd_elf32_swap_symbol_in
1411 PARAMS ((bfd
*, const Elf32_External_Sym
*, const Elf_External_Sym_Shndx
*,
1412 Elf_Internal_Sym
*));
1413 extern void bfd_elf32_swap_symbol_out
1414 PARAMS ((bfd
*, const Elf_Internal_Sym
*, PTR
, PTR
));
1415 extern void bfd_elf32_swap_reloc_in
1416 PARAMS ((bfd
*, const Elf32_External_Rel
*, Elf_Internal_Rel
*));
1417 extern void bfd_elf32_swap_reloc_out
1418 PARAMS ((bfd
*, const Elf_Internal_Rel
*, Elf32_External_Rel
*));
1419 extern void bfd_elf32_swap_reloca_in
1420 PARAMS ((bfd
*, const Elf32_External_Rela
*, Elf_Internal_Rela
*));
1421 extern void bfd_elf32_swap_reloca_out
1422 PARAMS ((bfd
*, const Elf_Internal_Rela
*, Elf32_External_Rela
*));
1423 extern void bfd_elf32_swap_phdr_in
1424 PARAMS ((bfd
*, const Elf32_External_Phdr
*, Elf_Internal_Phdr
*));
1425 extern void bfd_elf32_swap_phdr_out
1426 PARAMS ((bfd
*, const Elf_Internal_Phdr
*, Elf32_External_Phdr
*));
1427 extern void bfd_elf32_swap_dyn_in
1428 PARAMS ((bfd
*, const PTR
, Elf_Internal_Dyn
*));
1429 extern void bfd_elf32_swap_dyn_out
1430 PARAMS ((bfd
*, const Elf_Internal_Dyn
*, PTR
));
1431 extern long bfd_elf32_slurp_symbol_table
1432 PARAMS ((bfd
*, asymbol
**, boolean
));
1433 extern boolean bfd_elf32_write_shdrs_and_ehdr
1435 extern int bfd_elf32_write_out_phdrs
1436 PARAMS ((bfd
*, const Elf_Internal_Phdr
*, unsigned int));
1437 extern void bfd_elf32_write_relocs
1438 PARAMS ((bfd
*, asection
*, PTR
));
1439 extern boolean bfd_elf32_slurp_reloc_table
1440 PARAMS ((bfd
*, asection
*, asymbol
**, boolean
));
1441 extern boolean bfd_elf32_add_dynamic_entry
1442 PARAMS ((struct bfd_link_info
*, bfd_vma
, bfd_vma
));
1443 extern boolean bfd_elf32_link_create_dynamic_sections
1444 PARAMS ((bfd
*, struct bfd_link_info
*));
1445 extern Elf_Internal_Rela
*_bfd_elf32_link_read_relocs
1446 PARAMS ((bfd
*, asection
*, PTR
, Elf_Internal_Rela
*, boolean
));
1448 extern const bfd_target
*bfd_elf64_object_p
1450 extern const bfd_target
*bfd_elf64_core_file_p
1452 extern char *bfd_elf64_core_file_failing_command
1454 extern int bfd_elf64_core_file_failing_signal
1456 extern boolean bfd_elf64_core_file_matches_executable_p
1457 PARAMS ((bfd
*, bfd
*));
1458 extern boolean bfd_elf64_bfd_link_add_symbols
1459 PARAMS ((bfd
*, struct bfd_link_info
*));
1460 extern boolean bfd_elf64_bfd_final_link
1461 PARAMS ((bfd
*, struct bfd_link_info
*));
1463 extern void bfd_elf64_swap_symbol_in
1464 PARAMS ((bfd
*, const Elf64_External_Sym
*, const Elf_External_Sym_Shndx
*,
1465 Elf_Internal_Sym
*));
1466 extern void bfd_elf64_swap_symbol_out
1467 PARAMS ((bfd
*, const Elf_Internal_Sym
*, PTR
, PTR
));
1468 extern void bfd_elf64_swap_reloc_in
1469 PARAMS ((bfd
*, const Elf64_External_Rel
*, Elf_Internal_Rel
*));
1470 extern void bfd_elf64_swap_reloc_out
1471 PARAMS ((bfd
*, const Elf_Internal_Rel
*, Elf64_External_Rel
*));
1472 extern void bfd_elf64_swap_reloca_in
1473 PARAMS ((bfd
*, const Elf64_External_Rela
*, Elf_Internal_Rela
*));
1474 extern void bfd_elf64_swap_reloca_out
1475 PARAMS ((bfd
*, const Elf_Internal_Rela
*, Elf64_External_Rela
*));
1476 extern void bfd_elf64_swap_phdr_in
1477 PARAMS ((bfd
*, const Elf64_External_Phdr
*, Elf_Internal_Phdr
*));
1478 extern void bfd_elf64_swap_phdr_out
1479 PARAMS ((bfd
*, const Elf_Internal_Phdr
*, Elf64_External_Phdr
*));
1480 extern void bfd_elf64_swap_dyn_in
1481 PARAMS ((bfd
*, const PTR
, Elf_Internal_Dyn
*));
1482 extern void bfd_elf64_swap_dyn_out
1483 PARAMS ((bfd
*, const Elf_Internal_Dyn
*, PTR
));
1484 extern long bfd_elf64_slurp_symbol_table
1485 PARAMS ((bfd
*, asymbol
**, boolean
));
1486 extern boolean bfd_elf64_write_shdrs_and_ehdr
1488 extern int bfd_elf64_write_out_phdrs
1489 PARAMS ((bfd
*, const Elf_Internal_Phdr
*, unsigned int));
1490 extern void bfd_elf64_write_relocs
1491 PARAMS ((bfd
*, asection
*, PTR
));
1492 extern boolean bfd_elf64_slurp_reloc_table
1493 PARAMS ((bfd
*, asection
*, asymbol
**, boolean
));
1494 extern boolean bfd_elf64_add_dynamic_entry
1495 PARAMS ((struct bfd_link_info
*, bfd_vma
, bfd_vma
));
1496 extern boolean bfd_elf64_link_create_dynamic_sections
1497 PARAMS ((bfd
*, struct bfd_link_info
*));
1498 extern Elf_Internal_Rela
*_bfd_elf64_link_read_relocs
1499 PARAMS ((bfd
*, asection
*, PTR
, Elf_Internal_Rela
*, boolean
));
1501 #define bfd_elf32_link_record_dynamic_symbol \
1502 _bfd_elf_link_record_dynamic_symbol
1503 #define bfd_elf64_link_record_dynamic_symbol \
1504 _bfd_elf_link_record_dynamic_symbol
1506 extern boolean _bfd_elf32_link_record_local_dynamic_symbol
1507 PARAMS ((struct bfd_link_info
*, bfd
*, long));
1508 extern boolean _bfd_elf64_link_record_local_dynamic_symbol
1509 PARAMS ((struct bfd_link_info
*, bfd
*, long));
1511 extern boolean _bfd_elf_close_and_cleanup
1513 extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn
1514 PARAMS ((bfd
*, arelent
*, struct symbol_cache_entry
*, PTR
,
1515 asection
*, bfd
*, char **));
1517 extern boolean _bfd_elf32_gc_sections
1518 PARAMS ((bfd
*, struct bfd_link_info
*));
1519 extern boolean _bfd_elf32_gc_common_finalize_got_offsets
1520 PARAMS ((bfd
*, struct bfd_link_info
*));
1521 extern boolean _bfd_elf32_gc_common_final_link
1522 PARAMS ((bfd
*, struct bfd_link_info
*));
1523 extern boolean _bfd_elf32_gc_record_vtinherit
1524 PARAMS ((bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
));
1525 extern boolean _bfd_elf32_gc_record_vtentry
1526 PARAMS ((bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
));
1528 extern boolean _bfd_elf64_gc_sections
1529 PARAMS ((bfd
*, struct bfd_link_info
*));
1530 extern boolean _bfd_elf64_gc_common_finalize_got_offsets
1531 PARAMS ((bfd
*, struct bfd_link_info
*));
1532 extern boolean _bfd_elf64_gc_common_final_link
1533 PARAMS ((bfd
*, struct bfd_link_info
*));
1534 extern boolean _bfd_elf64_gc_record_vtinherit
1535 PARAMS ((bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
));
1536 extern boolean _bfd_elf64_gc_record_vtentry
1537 PARAMS ((bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
));
1539 extern boolean _bfd_elf32_reloc_symbol_deleted_p
1540 PARAMS ((bfd_vma
, PTR
));
1541 extern boolean _bfd_elf64_reloc_symbol_deleted_p
1542 PARAMS ((bfd_vma
, PTR
));
1544 /* Exported interface for writing elf corefile notes. */
1545 extern char *elfcore_write_note
1546 PARAMS ((bfd
*, char *, int *, char *, int, void *, int));
1547 extern char *elfcore_write_prpsinfo
1548 PARAMS ((bfd
*, char *, int *, char *, char *));
1549 extern char *elfcore_write_prstatus
1550 PARAMS ((bfd
*, char *, int *, long, int, void *));
1551 extern char * elfcore_write_pstatus
1552 PARAMS ((bfd
*, char *, int *, long, int, void *));
1553 extern char *elfcore_write_prfpreg
1554 PARAMS ((bfd
*, char *, int *, void *, int));
1555 extern char *elfcore_write_prxfpreg
1556 PARAMS ((bfd
*, char *, int *, void *, int));
1557 extern char *elfcore_write_lwpstatus
1558 PARAMS ((bfd
*, char*, int*, long, int, void*));
1560 /* SH ELF specific routine. */
1562 extern boolean _sh_elf_set_mach_from_flags
1565 #endif /* _LIBELF_H_ */