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 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_EH_FRAME_HDR
,
239 ELF_INFO_TYPE_JUST_SYMS
,
243 /* Cached start, size and alignment of PT_TLS segment. */
244 struct elf_link_tls_segment
251 /* ELF linker hash table. */
253 struct elf_link_hash_table
255 struct bfd_link_hash_table root
;
257 /* Whether we have created the special dynamic sections required
258 when linking against or generating a shared object. */
259 boolean dynamic_sections_created
;
261 /* The BFD used to hold special sections created by the linker.
262 This will be the first BFD found which requires these sections to
266 /* The value to use when initialising got.refcount/offset and
267 plt.refcount/offset in an elf_link_hash_entry. Set to zero when
268 the values are refcounts. Set to -1 in size_dynamic_sections
269 when the values may be offsets. */
270 bfd_signed_vma init_refcount
;
272 /* The number of symbols found in the link which must be put into
273 the .dynsym section. */
274 bfd_size_type dynsymcount
;
276 /* The string table of dynamic symbols, which becomes the .dynstr
278 struct elf_strtab_hash
*dynstr
;
280 /* The number of buckets in the hash table in the .hash section.
281 This is based on the number of dynamic symbols. */
282 bfd_size_type bucketcount
;
284 /* A linked list of DT_NEEDED names found in dynamic objects
285 included in the link. */
286 struct bfd_link_needed_list
*needed
;
288 /* The _GLOBAL_OFFSET_TABLE_ symbol. */
289 struct elf_link_hash_entry
*hgot
;
291 /* A pointer to information used to link stabs in sections. */
294 /* A pointer to information used to merge SEC_MERGE sections. */
297 /* A linked list of local symbols to be added to .dynsym. */
298 struct elf_link_local_dynamic_entry
*dynlocal
;
300 /* A linked list of DT_RPATH/DT_RUNPATH names found in dynamic
301 objects included in the link. */
302 struct bfd_link_needed_list
*runpath
;
304 /* Cached start, size and alignment of PT_TLS segment. */
305 struct elf_link_tls_segment
*tls_segment
;
307 /* A linked list of BFD's loaded in the link. */
308 struct elf_link_loaded_list
*loaded
;
311 /* Look up an entry in an ELF linker hash table. */
313 #define elf_link_hash_lookup(table, string, create, copy, follow) \
314 ((struct elf_link_hash_entry *) \
315 bfd_link_hash_lookup (&(table)->root, (string), (create), \
318 /* Traverse an ELF linker hash table. */
320 #define elf_link_hash_traverse(table, func, info) \
321 (bfd_link_hash_traverse \
323 (boolean (*) PARAMS ((struct bfd_link_hash_entry *, PTR))) (func), \
326 /* Get the ELF linker hash table from a link_info structure. */
328 #define elf_hash_table(p) ((struct elf_link_hash_table *) ((p)->hash))
330 /* Returns true if the hash table is a struct elf_link_hash_table. */
331 #define is_elf_hash_table(p) \
332 ((p)->hash->type == bfd_link_elf_hash_table)
334 /* Used by bfd_section_from_r_symndx to cache a small number of local
335 symbol to section mappings. */
336 #define LOCAL_SYM_CACHE_SIZE 32
340 unsigned long indx
[LOCAL_SYM_CACHE_SIZE
];
341 asection
*sec
[LOCAL_SYM_CACHE_SIZE
];
344 /* Constant information held for an ELF backend. */
346 struct elf_size_info
{
347 unsigned char sizeof_ehdr
, sizeof_phdr
, sizeof_shdr
;
348 unsigned char sizeof_rel
, sizeof_rela
, sizeof_sym
, sizeof_dyn
, sizeof_note
;
350 /* The size of entries in the .hash section. */
351 unsigned char sizeof_hash_entry
;
353 /* The number of internal relocations to allocate per external
355 unsigned char int_rels_per_ext_rel
;
357 unsigned char arch_size
, file_align
;
358 unsigned char elfclass
, ev_current
;
359 int (*write_out_phdrs
)
360 PARAMS ((bfd
*, const Elf_Internal_Phdr
*, unsigned int));
361 boolean (*write_shdrs_and_ehdr
)
364 PARAMS ((bfd
*, asection
*, PTR
));
365 void (*swap_symbol_in
)
366 PARAMS ((bfd
*, const PTR
, const PTR
, Elf_Internal_Sym
*));
367 void (*swap_symbol_out
)
368 PARAMS ((bfd
*, const Elf_Internal_Sym
*, PTR
, PTR
));
369 boolean (*slurp_reloc_table
)
370 PARAMS ((bfd
*, asection
*, asymbol
**, boolean
));
371 long (*slurp_symbol_table
)
372 PARAMS ((bfd
*, asymbol
**, boolean
));
374 PARAMS ((bfd
*, const PTR
, Elf_Internal_Dyn
*));
376 PARAMS ((bfd
*, const Elf_Internal_Dyn
*, PTR
));
378 /* This function, if defined, is called to swap in a REL
379 relocation. If an external relocation corresponds to more than
380 one internal relocation, then all relocations are swapped in at
382 void (*swap_reloc_in
)
383 PARAMS ((bfd
*, const bfd_byte
*, Elf_Internal_Rel
*));
385 /* This function, if defined, is called to swap out a REL
387 void (*swap_reloc_out
)
388 PARAMS ((bfd
*, const Elf_Internal_Rel
*, bfd_byte
*));
390 /* This function, if defined, is called to swap in a RELA
391 relocation. If an external relocation corresponds to more than
392 one internal relocation, then all relocations are swapped in at
394 void (*swap_reloca_in
)
395 PARAMS ((bfd
*, const bfd_byte
*, Elf_Internal_Rela
*));
397 /* This function, if defined, is called to swap out a RELA
399 void (*swap_reloca_out
)
400 PARAMS ((bfd
*, const Elf_Internal_Rela
*, bfd_byte
*));
404 #define elf_symbol_from(ABFD,S) \
405 (((S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \
406 && (S)->the_bfd->tdata.elf_obj_data != 0) \
407 ? (elf_symbol_type *) (S) \
410 enum elf_reloc_type_class
{
412 reloc_class_relative
,
417 struct elf_reloc_cookie
419 Elf_Internal_Rela
*rels
, *rel
, *relend
;
425 struct elf_link_hash_entry
**sym_hashes
;
429 /* The level of IRIX compatibility we're striving for. */
437 struct elf_backend_data
439 /* The architecture for this backend. */
440 enum bfd_architecture arch
;
442 /* The ELF machine code (EM_xxxx) for this backend. */
443 int elf_machine_code
;
445 /* The maximum page size for this backend. */
448 /* A function to translate an ELF RELA relocation to a BFD arelent
450 void (*elf_info_to_howto
)
451 PARAMS ((bfd
*, arelent
*, Elf_Internal_Rela
*));
453 /* A function to translate an ELF REL relocation to a BFD arelent
455 void (*elf_info_to_howto_rel
)
456 PARAMS ((bfd
*, arelent
*, Elf_Internal_Rel
*));
458 /* A function to determine whether a symbol is global when
459 partitioning the symbol table into local and global symbols.
460 This should be NULL for most targets, in which case the correct
461 thing will be done. MIPS ELF, at least on the Irix 5, has
462 special requirements. */
463 boolean (*elf_backend_sym_is_global
)
464 PARAMS ((bfd
*, asymbol
*));
466 /* The remaining functions are hooks which are called only if they
469 /* A function to permit a backend specific check on whether a
470 particular BFD format is relevant for an object file, and to
471 permit the backend to set any global information it wishes. When
472 this is called elf_elfheader is set, but anything else should be
473 used with caution. If this returns false, the check_format
474 routine will return a bfd_error_wrong_format error. */
475 boolean (*elf_backend_object_p
)
478 /* A function to do additional symbol processing when reading the
479 ELF symbol table. This is where any processor-specific special
480 section indices are handled. */
481 void (*elf_backend_symbol_processing
)
482 PARAMS ((bfd
*, asymbol
*));
484 /* A function to do additional symbol processing after reading the
485 entire ELF symbol table. */
486 boolean (*elf_backend_symbol_table_processing
)
487 PARAMS ((bfd
*, elf_symbol_type
*, unsigned int));
489 /* A function to set the type of the info field. Processor-specific
490 types should be handled here. */
491 int (*elf_backend_get_symbol_type
)
492 PARAMS (( Elf_Internal_Sym
*, int));
494 /* A function to do additional processing on the ELF section header
495 just before writing it out. This is used to set the flags and
496 type fields for some sections, or to actually write out data for
498 boolean (*elf_backend_section_processing
)
499 PARAMS ((bfd
*, Elf32_Internal_Shdr
*));
501 /* A function to handle unusual section types when creating BFD
502 sections from ELF sections. */
503 boolean (*elf_backend_section_from_shdr
)
504 PARAMS ((bfd
*, Elf32_Internal_Shdr
*, const char *));
506 /* A function to convert machine dependent section header flags to
507 BFD internal section header flags. */
508 boolean (*elf_backend_section_flags
)
509 PARAMS ((flagword
*, Elf32_Internal_Shdr
*));
511 /* A function to handle unusual program segment types when creating BFD
512 sections from ELF program segments. */
513 boolean (*elf_backend_section_from_phdr
)
514 PARAMS ((bfd
*, Elf32_Internal_Phdr
*, int));
516 /* A function to set up the ELF section header for a BFD section in
517 preparation for writing it out. This is where the flags and type
518 fields are set for unusual sections. */
519 boolean (*elf_backend_fake_sections
)
520 PARAMS ((bfd
*, Elf32_Internal_Shdr
*, asection
*));
522 /* A function to get the ELF section index for a BFD section. If
523 this returns true, the section was found. If it is a normal ELF
524 section, *RETVAL should be left unchanged. If it is not a normal
525 ELF section *RETVAL should be set to the SHN_xxxx index. */
526 boolean (*elf_backend_section_from_bfd_section
)
527 PARAMS ((bfd
*, asection
*, int *retval
));
529 /* If this field is not NULL, it is called by the add_symbols phase
530 of a link just before adding a symbol to the global linker hash
531 table. It may modify any of the fields as it wishes. If *NAME
532 is set to NULL, the symbol will be skipped rather than being
533 added to the hash table. This function is responsible for
534 handling all processor dependent symbol bindings and section
535 indices, and must set at least *FLAGS and *SEC for each processor
536 dependent case; failure to do so will cause a link error. */
537 boolean (*elf_add_symbol_hook
)
538 PARAMS ((bfd
*abfd
, struct bfd_link_info
*info
,
539 const Elf_Internal_Sym
*, const char **name
,
540 flagword
*flags
, asection
**sec
, bfd_vma
*value
));
542 /* If this field is not NULL, it is called by the elf_link_output_sym
543 phase of a link for each symbol which will appear in the object file. */
544 boolean (*elf_backend_link_output_symbol_hook
)
545 PARAMS ((bfd
*, struct bfd_link_info
*info
, const char *,
546 Elf_Internal_Sym
*, asection
*));
548 /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend
549 linker the first time it encounters a dynamic object in the link.
550 This function must create any sections required for dynamic
551 linking. The ABFD argument is a dynamic object. The .interp,
552 .dynamic, .dynsym, .dynstr, and .hash functions have already been
553 created, and this function may modify the section flags if
554 desired. This function will normally create the .got and .plt
555 sections, but different backends have different requirements. */
556 boolean (*elf_backend_create_dynamic_sections
)
557 PARAMS ((bfd
*abfd
, struct bfd_link_info
*info
));
559 /* The CHECK_RELOCS function is called by the add_symbols phase of
560 the ELF backend linker. It is called once for each section with
561 relocs of an object file, just after the symbols for the object
562 file have been added to the global linker hash table. The
563 function must look through the relocs and do any special handling
564 required. This generally means allocating space in the global
565 offset table, and perhaps allocating space for a reloc. The
566 relocs are always passed as Rela structures; if the section
567 actually uses Rel structures, the r_addend field will always be
569 boolean (*check_relocs
)
570 PARAMS ((bfd
*abfd
, struct bfd_link_info
*info
, asection
*o
,
571 const Elf_Internal_Rela
*relocs
));
573 /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
574 linker for every symbol which is defined by a dynamic object and
575 referenced by a regular object. This is called after all the
576 input files have been seen, but before the SIZE_DYNAMIC_SECTIONS
577 function has been called. The hash table entry should be
578 bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be
579 defined in a section from a dynamic object. Dynamic object
580 sections are not included in the final link, and this function is
581 responsible for changing the value to something which the rest of
582 the link can deal with. This will normally involve adding an
583 entry to the .plt or .got or some such section, and setting the
584 symbol to point to that. */
585 boolean (*elf_backend_adjust_dynamic_symbol
)
586 PARAMS ((struct bfd_link_info
*info
, struct elf_link_hash_entry
*h
));
588 /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker
589 after all the linker input files have been seen but before the
590 section sizes have been set. This is called after
591 ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS. */
592 boolean (*elf_backend_always_size_sections
)
593 PARAMS ((bfd
*output_bfd
, struct bfd_link_info
*info
));
595 /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend
596 linker after all the linker input files have been seen but before
597 the sections sizes have been set. This is called after
598 ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols.
599 It is only called when linking against a dynamic object. It must
600 set the sizes of the dynamic sections, and may fill in their
601 contents as well. The generic ELF linker can handle the .dynsym,
602 .dynstr and .hash sections. This function must handle the
603 .interp section and any sections created by the
604 CREATE_DYNAMIC_SECTIONS entry point. */
605 boolean (*elf_backend_size_dynamic_sections
)
606 PARAMS ((bfd
*output_bfd
, struct bfd_link_info
*info
));
608 /* The RELOCATE_SECTION function is called by the ELF backend linker
609 to handle the relocations for a section.
611 The relocs are always passed as Rela structures; if the section
612 actually uses Rel structures, the r_addend field will always be
615 This function is responsible for adjust the section contents as
616 necessary, and (if using Rela relocs and generating a
617 relocateable output file) adjusting the reloc addend as
620 This function does not have to worry about setting the reloc
621 address or the reloc symbol index.
623 LOCAL_SYMS is a pointer to the swapped in local symbols.
625 LOCAL_SECTIONS is an array giving the section in the input file
626 corresponding to the st_shndx field of each local symbol.
628 The global hash table entry for the global symbols can be found
629 via elf_sym_hashes (input_bfd).
631 When generating relocateable output, this function must handle
632 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
633 going to be the section symbol corresponding to the output
634 section, which means that the addend must be adjusted
636 boolean (*elf_backend_relocate_section
)
637 PARAMS ((bfd
*output_bfd
, struct bfd_link_info
*info
,
638 bfd
*input_bfd
, asection
*input_section
, bfd_byte
*contents
,
639 Elf_Internal_Rela
*relocs
, Elf_Internal_Sym
*local_syms
,
640 asection
**local_sections
));
642 /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend
643 linker just before it writes a symbol out to the .dynsym section.
644 The processor backend may make any required adjustment to the
645 symbol. It may also take the opportunity to set contents of the
646 dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on
647 all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called
648 on those symbols which are defined by a dynamic object. */
649 boolean (*elf_backend_finish_dynamic_symbol
)
650 PARAMS ((bfd
*output_bfd
, struct bfd_link_info
*info
,
651 struct elf_link_hash_entry
*h
, Elf_Internal_Sym
*sym
));
653 /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend
654 linker just before it writes all the dynamic sections out to the
655 output file. The FINISH_DYNAMIC_SYMBOL will have been called on
656 all dynamic symbols. */
657 boolean (*elf_backend_finish_dynamic_sections
)
658 PARAMS ((bfd
*output_bfd
, struct bfd_link_info
*info
));
660 /* A function to do any beginning processing needed for the ELF file
661 before building the ELF headers and computing file positions. */
662 void (*elf_backend_begin_write_processing
)
663 PARAMS ((bfd
*, struct bfd_link_info
*));
665 /* A function to do any final processing needed for the ELF file
666 before writing it out. The LINKER argument is true if this BFD
667 was created by the ELF backend linker. */
668 void (*elf_backend_final_write_processing
)
669 PARAMS ((bfd
*, boolean linker
));
671 /* This function is called by get_program_header_size. It should
672 return the number of additional program segments which this BFD
673 will need. It should return -1 on error. */
674 int (*elf_backend_additional_program_headers
)
677 /* This function is called to modify an existing segment map in a
678 backend specific fashion. */
679 boolean (*elf_backend_modify_segment_map
)
682 /* This function is called during section gc to discover the section a
683 particular relocation refers to. */
684 asection
* (*gc_mark_hook
)
685 PARAMS ((asection
*sec
, struct bfd_link_info
*, Elf_Internal_Rela
*,
686 struct elf_link_hash_entry
*h
, Elf_Internal_Sym
*));
688 /* This function, if defined, is called during the sweep phase of gc
689 in order that a backend might update any data structures it might
691 boolean (*gc_sweep_hook
)
692 PARAMS ((bfd
*abfd
, struct bfd_link_info
*info
, asection
*o
,
693 const Elf_Internal_Rela
*relocs
));
695 /* This function, if defined, is called after the ELF headers have
696 been created. This allows for things like the OS and ABI versions
698 void (*elf_backend_post_process_headers
)
699 PARAMS ((bfd
*, struct bfd_link_info
*));
701 /* This function, if defined, prints a symbol to file and returns the
702 name of the symbol to be printed. It should return NULL to fall
703 back to default symbol printing. */
704 const char *(*elf_backend_print_symbol_all
)
705 PARAMS ((bfd
*, PTR
, asymbol
*));
707 /* This function, if defined, is called after all local symbols and
708 global symbols converted to locals are emited into the symtab
709 section. It allows the backend to emit special global symbols
710 not handled in the hash table. */
711 boolean (*elf_backend_output_arch_syms
)
712 PARAMS ((bfd
*, struct bfd_link_info
*, PTR
,
713 boolean (*) (PTR
, const char *, Elf_Internal_Sym
*, asection
*)));
715 /* Copy any information related to dynamic linking from a pre-existing
716 symbol to a newly created symbol. Also called to copy flags and
717 other back-end info to a weakdef, in which case the symbol is not
718 newly created and plt/got refcounts and dynamic indices should not
720 void (*elf_backend_copy_indirect_symbol
)
721 PARAMS ((struct elf_link_hash_entry
*, struct elf_link_hash_entry
*));
723 /* Modify any information related to dynamic linking such that the
724 symbol is not exported. */
725 void (*elf_backend_hide_symbol
)
726 PARAMS ((struct bfd_link_info
*, struct elf_link_hash_entry
*, boolean
));
728 /* Emit relocations. Overrides default routine for emitting relocs,
729 except during a relocatable link, or if all relocs are being emitted. */
730 boolean (*elf_backend_emit_relocs
)
731 PARAMS ((bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*));
733 /* Count relocations. Not called for relocatable links
734 or if all relocs are being preserved in the output. */
735 unsigned int (*elf_backend_count_relocs
)
736 PARAMS ((asection
*, Elf_Internal_Rela
*));
738 /* This function, if defined, is called when an NT_PRSTATUS note is found
740 boolean (*elf_backend_grok_prstatus
)
741 PARAMS ((bfd
*, Elf_Internal_Note
*));
743 /* This function, if defined, is called when an NT_PSINFO or NT_PRPSINFO
744 note is found in a core file. */
745 boolean (*elf_backend_grok_psinfo
)
746 PARAMS ((bfd
*, Elf_Internal_Note
*));
748 /* Functions to print VMAs. Special code to handle 64 bit ELF files. */
749 void (* elf_backend_sprintf_vma
)
750 PARAMS ((bfd
*, char *, bfd_vma
));
751 void (* elf_backend_fprintf_vma
)
752 PARAMS ((bfd
*, PTR
, bfd_vma
));
754 /* This function returns class of a reloc type. */
755 enum elf_reloc_type_class (*elf_backend_reloc_type_class
)
756 PARAMS ((const Elf_Internal_Rela
*));
758 /* This function, if defined, removes information about discarded functions
759 from other sections which mention them. */
760 boolean (*elf_backend_discard_info
)
761 PARAMS ((bfd
*, struct elf_reloc_cookie
*, struct bfd_link_info
*));
763 /* This function, if defined, signals that the function above has removed
764 the discarded relocations for this section. */
765 boolean (*elf_backend_ignore_discarded_relocs
)
766 PARAMS ((asection
*));
768 /* This function, if defined, may write out the given section.
769 Returns true if it did so and false if the caller should. */
770 boolean (*elf_backend_write_section
)
771 PARAMS ((bfd
*, asection
*, bfd_byte
*));
773 /* This function, if defined, sets up the file positions for non PT_LOAD
774 segments, especially for segments containing non-allocated sections. */
775 void (*set_nonloadable_filepos
)
776 PARAMS ((bfd
*, Elf_Internal_Phdr
*));
778 /* This function, if defined, returns true if the section is contained
779 within the segment. File positions are compared. */
780 boolean (*is_contained_by_filepos
)
781 PARAMS ((asection
*, Elf_Internal_Phdr
*));
783 /* This function, if defined, returns true if copy_private_bfd_data
784 should be called. It provides a way of overriding default
785 test conditions in _bfd_elf_copy_private_section_data. */
786 boolean (*copy_private_bfd_data_p
)
787 PARAMS ((bfd
*, asection
*, bfd
*, asection
*));
789 /* The level of IRIX compatibility we're striving for.
790 MIPS ELF specific function. */
791 irix_compat_t (*elf_backend_mips_irix_compat
)
794 reloc_howto_type
*(*elf_backend_mips_rtype_to_howto
)
795 PARAMS ((unsigned int, boolean
));
797 /* The swapping table to use when dealing with ECOFF information.
798 Used for the MIPS ELF .mdebug section. */
799 const struct ecoff_debug_swap
*elf_backend_ecoff_debug_swap
;
801 /* Alternate EM_xxxx machine codes for this backend. */
802 int elf_machine_alt1
;
803 int elf_machine_alt2
;
805 const struct elf_size_info
*s
;
807 /* offset of the _GLOBAL_OFFSET_TABLE_ symbol from the start of the
809 bfd_vma got_symbol_offset
;
811 /* The size in bytes of the headers for the GOT and PLT. This includes
812 the so-called reserved entries on some systems. */
813 bfd_vma got_header_size
;
814 bfd_vma plt_header_size
;
816 /* This is true if the linker should act like collect and gather
817 global constructors and destructors by name. This is true for
818 MIPS ELF because the Irix 5 tools can not handle the .init
820 unsigned collect
: 1;
822 /* This is true if the linker should ignore changes to the type of a
823 symbol. This is true for MIPS ELF because some Irix 5 objects
824 record undefined functions as STT_OBJECT although the definitions
826 unsigned type_change_ok
: 1;
828 /* Whether the backend may use REL relocations. (Some backends use
829 both REL and RELA relocations, and this flag is set for those
831 unsigned may_use_rel_p
: 1;
833 /* Whether the backend may use RELA relocations. (Some backends use
834 both REL and RELA relocations, and this flag is set for those
836 unsigned may_use_rela_p
: 1;
838 /* Whether the default relocation type is RELA. If a backend with
839 this flag set wants REL relocations for a particular section,
840 it must note that explicitly. Similarly, if this flag is clear,
841 and the backend wants RELA relocations for a particular
843 unsigned default_use_rela_p
: 1;
845 /* Set if RELA relocations for a relocatable link can be handled by
846 generic code. Backends that set this flag need do nothing in the
847 backend relocate_section routine for relocatable linking. */
848 unsigned rela_normal
: 1;
850 /* True if addresses "naturally" sign extend. This is used when
851 swapping in from Elf32 when BFD64. */
852 unsigned sign_extend_vma
: 1;
854 unsigned want_got_plt
: 1;
855 unsigned plt_readonly
: 1;
856 unsigned want_plt_sym
: 1;
857 unsigned plt_not_loaded
: 1;
858 unsigned plt_alignment
: 4;
859 unsigned can_gc_sections
: 1;
860 unsigned can_refcount
: 1;
861 unsigned want_got_sym
: 1;
862 unsigned want_dynbss
: 1;
865 /* Information stored for each BFD section in an ELF file. This
866 structure is allocated by elf_new_section_hook. */
868 struct bfd_elf_section_data
870 /* The ELF header for this section. */
871 Elf_Internal_Shdr this_hdr
;
873 /* The ELF header for the reloc section associated with this
875 Elf_Internal_Shdr rel_hdr
;
877 /* If there is a second reloc section associated with this section,
878 as can happen on Irix 6, this field points to the header. */
879 Elf_Internal_Shdr
*rel_hdr2
;
881 /* The number of relocations currently assigned to REL_HDR. */
882 unsigned int rel_count
;
884 /* The number of relocations currently assigned to REL_HDR2. */
885 unsigned int rel_count2
;
887 /* A pointer to a linked list tracking dynamic relocs copied for
891 /* A pointer to the bfd section used for dynamic relocs. */
894 /* The ELF section number of this section. Only used for an output
898 /* The ELF section number of the reloc section indicated by
899 REL_HDR if any. Only used for an output file. */
902 /* The ELF section number of the reloc section indicated by
903 REL_HDR2 if any. Only used for an output file. */
906 /* Used by the backend linker to store the symbol hash table entries
907 associated with relocs against global symbols. */
908 struct elf_link_hash_entry
**rel_hashes
;
910 /* A pointer to the swapped relocs. If the section uses REL relocs,
911 rather than RELA, all the r_addend fields will be zero. This
912 pointer may be NULL. It is used by the backend linker. */
913 Elf_Internal_Rela
*relocs
;
915 /* Used by the backend linker when generating a shared library to
916 record the dynamic symbol index for a section symbol
917 corresponding to this section. A value of 0 means that there is
918 no dynamic symbol for this section. */
921 /* A pointer used for various section optimizations. */
924 /* Type of that information. */
925 enum elf_link_info_type sec_info_type
;
928 /* Group name, if this section is a member of a group. */
931 /* Group signature sym, if this is the SHT_GROUP section. */
932 struct symbol_cache_entry
*id
;
935 /* A linked list of sections in the group. Circular when used by
937 asection
*next_in_group
;
939 /* A pointer available for the processor specific ELF backend. */
942 /* Nonzero if this section uses RELA relocations, rather than REL. */
943 unsigned int use_rela_p
:1;
945 /* Nonzero when a group is COMDAT. */
946 unsigned int linkonce_p
:1;
949 #define elf_section_data(sec) ((struct bfd_elf_section_data*)sec->used_by_bfd)
950 #define elf_group_name(sec) (elf_section_data(sec)->group.name)
951 #define elf_group_id(sec) (elf_section_data(sec)->group.id)
952 #define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group)
953 #define elf_linkonce_p(sec) (elf_section_data(sec)->linkonce_p)
955 /* Return true if section has been discarded. */
956 #define elf_discarded_section(sec) \
957 (!bfd_is_abs_section(sec) \
958 && bfd_is_abs_section((sec)->output_section) \
959 && elf_section_data (sec)->sec_info_type != ELF_INFO_TYPE_MERGE \
960 && elf_section_data (sec)->sec_info_type != ELF_INFO_TYPE_JUST_SYMS)
962 #define get_elf_backend_data(abfd) \
963 ((struct elf_backend_data *) (abfd)->xvec->backend_data)
965 /* Enumeration to specify the special section. */
966 typedef enum elf_linker_section_enum
968 LINKER_SECTION_UNKNOWN
, /* not used */
969 LINKER_SECTION_GOT
, /* .got section for global offset pointers */
970 LINKER_SECTION_PLT
, /* .plt section for generated procedure stubs */
971 LINKER_SECTION_SDATA
, /* .sdata/.sbss section for PowerPC */
972 LINKER_SECTION_SDATA2
, /* .sdata2/.sbss2 section for PowerPC */
973 LINKER_SECTION_MAX
/* # of linker sections */
974 } elf_linker_section_enum_t
;
976 /* Sections created by the linker. */
978 typedef struct elf_linker_section
980 char *name
; /* name of the section */
981 char *rel_name
; /* name of the associated .rel{,a}. section */
982 char *bss_name
; /* name of a related .bss section */
983 char *sym_name
; /* name of symbol to reference this section */
984 asection
*section
; /* pointer to the section */
985 asection
*bss_section
; /* pointer to the bss section associated with this */
986 asection
*rel_section
; /* pointer to the relocations needed for this section */
987 struct elf_link_hash_entry
*sym_hash
; /* pointer to the created symbol hash value */
988 bfd_vma initial_size
; /* initial size before any linker generated allocations */
989 bfd_vma sym_offset
; /* offset of symbol from beginning of section */
990 bfd_vma hole_size
; /* size of reserved address hole in allocation */
991 bfd_vma hole_offset
; /* current offset for the hole */
992 bfd_vma max_hole_offset
; /* maximum offset for the hole */
993 elf_linker_section_enum_t which
; /* which section this is */
994 boolean hole_written_p
; /* whether the hole has been initialized */
995 unsigned int alignment
; /* alignment for the section */
996 flagword flags
; /* flags to use to create the section */
997 } elf_linker_section_t
;
999 /* Linked list of allocated pointer entries. This hangs off of the symbol lists, and
1000 provides allows us to return different pointers, based on different addend's. */
1002 typedef struct elf_linker_section_pointers
1004 struct elf_linker_section_pointers
*next
; /* next allocated pointer for this symbol */
1005 bfd_vma offset
; /* offset of pointer from beginning of section */
1006 bfd_vma addend
; /* addend used */
1007 elf_linker_section_enum_t which
; /* which linker section this is */
1008 boolean written_address_p
; /* whether address was written yet */
1009 } elf_linker_section_pointers_t
;
1011 /* Some private data is stashed away for future use using the tdata pointer
1012 in the bfd structure. */
1014 struct elf_obj_tdata
1016 Elf_Internal_Ehdr elf_header
[1]; /* Actual data, but ref like ptr */
1017 Elf_Internal_Shdr
**elf_sect_ptr
;
1018 Elf_Internal_Phdr
*phdr
;
1019 struct elf_segment_map
*segment_map
;
1020 struct elf_strtab_hash
*strtab_ptr
;
1023 unsigned int num_elf_sections
; /* elf_sect_ptr size */
1024 int num_section_syms
;
1025 asymbol
**section_syms
; /* STT_SECTION symbols for each section */
1026 Elf_Internal_Shdr symtab_hdr
;
1027 Elf_Internal_Shdr shstrtab_hdr
;
1028 Elf_Internal_Shdr strtab_hdr
;
1029 Elf_Internal_Shdr dynsymtab_hdr
;
1030 Elf_Internal_Shdr dynstrtab_hdr
;
1031 Elf_Internal_Shdr dynversym_hdr
;
1032 Elf_Internal_Shdr dynverref_hdr
;
1033 Elf_Internal_Shdr dynverdef_hdr
;
1034 Elf_Internal_Shdr symtab_shndx_hdr
;
1035 unsigned int symtab_section
, shstrtab_section
;
1036 unsigned int strtab_section
, dynsymtab_section
;
1037 unsigned int symtab_shndx_section
;
1038 unsigned int dynversym_section
, dynverdef_section
, dynverref_section
;
1039 file_ptr next_file_pos
;
1041 /* we don't need these inside bfd anymore, and I think
1042 these weren't used outside bfd. */
1043 void *prstatus
; /* The raw /proc prstatus structure */
1044 void *prpsinfo
; /* The raw /proc prpsinfo structure */
1046 bfd_vma gp
; /* The gp value */
1047 unsigned int gp_size
; /* The gp size */
1049 Elf_Internal_Shdr
**group_sect_ptr
;
1052 /* Information grabbed from an elf core file. */
1059 /* This is set to true if the object was created by the backend
1063 /* A mapping from external symbols to entries in the linker hash
1064 table, used when linking. This is indexed by the symbol index
1065 minus the sh_info field of the symbol table header. */
1066 struct elf_link_hash_entry
**sym_hashes
;
1068 /* A mapping from local symbols to offsets into the global offset
1069 table, used when linking. This is indexed by the symbol index.
1070 Like for the globals, we use a union and two names primarily to
1071 document the intent of any particular piece of code. The field
1072 should be used as a count until size_dynamic_sections, at which
1073 point the contents of the .got is fixed. Afterward, if an entry
1074 is -1, then the symbol does not require a global offset table entry. */
1077 bfd_signed_vma
*refcounts
;
1081 /* A mapping from local symbols to offsets into the various linker
1082 sections added. This is index by the symbol index. */
1083 elf_linker_section_pointers_t
**linker_section_pointers
;
1085 /* The linker ELF emulation code needs to let the backend ELF linker
1086 know what filename should be used for a dynamic object if the
1087 dynamic object is found using a search. The emulation code then
1088 sometimes needs to know what name was actually used. Until the
1089 file has been added to the linker symbol table, this field holds
1090 the name the linker wants. After it has been added, it holds the
1091 name actually used, which will be the DT_SONAME entry if there is
1093 const char *dt_name
;
1095 /* When a reference in a regular object is resolved by a shared
1096 object is loaded into via the DT_NEEDED entries by the linker
1097 ELF emulation code, we need to add the shared object to the
1098 DT_NEEDED list of the resulting binary to indicate the dependency
1099 as if the -l option is passed to the linker. This field holds the
1100 name of the loaded shared object. */
1101 const char *dt_soname
;
1103 /* Irix 5 often screws up the symbol table, sorting local symbols
1104 after global symbols. This flag is set if the symbol table in
1105 this BFD appears to be screwed up. If it is, we ignore the
1106 sh_info field in the symbol table header, and always read all the
1110 /* Records the result of `get_program_header_size'. */
1111 bfd_size_type program_header_size
;
1113 /* Used by find_nearest_line entry point. */
1116 /* Used by MIPS ELF find_nearest_line entry point. The structure
1117 could be included directly in this one, but there's no point to
1118 wasting the memory just for the infrequently called
1119 find_nearest_line. */
1120 struct mips_elf_find_line
*find_line_info
;
1122 /* A place to stash dwarf1 info for this bfd. */
1123 struct dwarf1_debug
*dwarf1_find_line_info
;
1125 /* A place to stash dwarf2 info for this bfd. */
1126 PTR dwarf2_find_line_info
;
1128 /* An array of stub sections indexed by symbol number, used by the
1129 MIPS ELF linker. FIXME: We should figure out some way to only
1130 include this field for a MIPS ELF target. */
1131 asection
**local_stubs
;
1133 /* Used to determine if the e_flags field has been initialized */
1136 /* Used to determine if PT_GNU_EH_FRAME segment header should be
1138 boolean eh_frame_hdr
;
1140 /* Number of symbol version definitions we are about to emit. */
1141 unsigned int cverdefs
;
1143 /* Number of symbol version references we are about to emit. */
1144 unsigned int cverrefs
;
1146 /* Symbol version definitions in external objects. */
1147 Elf_Internal_Verdef
*verdef
;
1149 /* Symbol version references to external objects. */
1150 Elf_Internal_Verneed
*verref
;
1152 /* Linker sections that we are interested in. */
1153 struct elf_linker_section
*linker_section
[ (int)LINKER_SECTION_MAX
];
1155 /* The Irix 5 support uses two virtual sections, which represent
1156 text/data symbols defined in dynamic objects. */
1157 asymbol
*elf_data_symbol
;
1158 asymbol
*elf_text_symbol
;
1159 asection
*elf_data_section
;
1160 asection
*elf_text_section
;
1163 #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
1164 #define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header)
1165 #define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr)
1166 #define elf_numsections(bfd) (elf_tdata(bfd) -> num_elf_sections)
1167 #define elf_shstrtab(bfd) (elf_tdata(bfd) -> strtab_ptr)
1168 #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section)
1169 #define elf_symtab_shndx(bfd) (elf_tdata(bfd) -> symtab_shndx_section)
1170 #define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section)
1171 #define elf_dynversym(bfd) (elf_tdata(bfd) -> dynversym_section)
1172 #define elf_dynverdef(bfd) (elf_tdata(bfd) -> dynverdef_section)
1173 #define elf_dynverref(bfd) (elf_tdata(bfd) -> dynverref_section)
1174 #define elf_num_locals(bfd) (elf_tdata(bfd) -> num_locals)
1175 #define elf_num_globals(bfd) (elf_tdata(bfd) -> num_globals)
1176 #define elf_section_syms(bfd) (elf_tdata(bfd) -> section_syms)
1177 #define elf_num_section_syms(bfd) (elf_tdata(bfd) -> num_section_syms)
1178 #define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
1179 #define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
1180 #define elf_gp(bfd) (elf_tdata(bfd) -> gp)
1181 #define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size)
1182 #define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes)
1183 #define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts)
1184 #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets)
1185 #define elf_local_ptr_offsets(bfd) (elf_tdata(bfd) -> linker_section_pointers)
1186 #define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name)
1187 #define elf_dt_soname(bfd) (elf_tdata(bfd) -> dt_soname)
1188 #define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab)
1189 #define elf_flags_init(bfd) (elf_tdata(bfd) -> flags_init)
1190 #define elf_linker_section(bfd,n) (elf_tdata(bfd) -> linker_section[(int)n])
1192 extern void _bfd_elf_swap_verdef_in
1193 PARAMS ((bfd
*, const Elf_External_Verdef
*, Elf_Internal_Verdef
*));
1194 extern void _bfd_elf_swap_verdef_out
1195 PARAMS ((bfd
*, const Elf_Internal_Verdef
*, Elf_External_Verdef
*));
1196 extern void _bfd_elf_swap_verdaux_in
1197 PARAMS ((bfd
*, const Elf_External_Verdaux
*, Elf_Internal_Verdaux
*));
1198 extern void _bfd_elf_swap_verdaux_out
1199 PARAMS ((bfd
*, const Elf_Internal_Verdaux
*, Elf_External_Verdaux
*));
1200 extern void _bfd_elf_swap_verneed_in
1201 PARAMS ((bfd
*, const Elf_External_Verneed
*, Elf_Internal_Verneed
*));
1202 extern void _bfd_elf_swap_verneed_out
1203 PARAMS ((bfd
*, const Elf_Internal_Verneed
*, Elf_External_Verneed
*));
1204 extern void _bfd_elf_swap_vernaux_in
1205 PARAMS ((bfd
*, const Elf_External_Vernaux
*, Elf_Internal_Vernaux
*));
1206 extern void _bfd_elf_swap_vernaux_out
1207 PARAMS ((bfd
*, const Elf_Internal_Vernaux
*, Elf_External_Vernaux
*));
1208 extern void _bfd_elf_swap_versym_in
1209 PARAMS ((bfd
*, const Elf_External_Versym
*, Elf_Internal_Versym
*));
1210 extern void _bfd_elf_swap_versym_out
1211 PARAMS ((bfd
*, const Elf_Internal_Versym
*, Elf_External_Versym
*));
1213 extern int _bfd_elf_section_from_bfd_section
1214 PARAMS ((bfd
*, asection
*));
1215 extern char *bfd_elf_string_from_elf_section
1216 PARAMS ((bfd
*, unsigned, unsigned));
1217 extern char *bfd_elf_get_str_section
1218 PARAMS ((bfd
*, unsigned));
1220 extern boolean _bfd_elf_copy_private_bfd_data
1221 PARAMS ((bfd
*, bfd
*));
1222 extern boolean _bfd_elf_print_private_bfd_data
1223 PARAMS ((bfd
*, PTR
));
1224 extern void bfd_elf_print_symbol
1225 PARAMS ((bfd
*, PTR
, asymbol
*, bfd_print_symbol_type
));
1227 #define elf_string_from_elf_strtab(abfd, strindex) \
1228 bfd_elf_string_from_elf_section(abfd, elf_elfheader(abfd)->e_shstrndx, \
1231 #define bfd_elf32_print_symbol bfd_elf_print_symbol
1232 #define bfd_elf64_print_symbol bfd_elf_print_symbol
1234 extern void _bfd_elf_sprintf_vma
1235 PARAMS ((bfd
*, char *, bfd_vma
));
1236 extern void _bfd_elf_fprintf_vma
1237 PARAMS ((bfd
*, PTR
, bfd_vma
));
1239 extern enum elf_reloc_type_class _bfd_elf_reloc_type_class
1240 PARAMS ((const Elf_Internal_Rela
*));
1241 extern bfd_vma _bfd_elf_rela_local_sym
1242 PARAMS ((bfd
*, Elf_Internal_Sym
*, asection
*, Elf_Internal_Rela
*));
1243 extern bfd_vma _bfd_elf_rel_local_sym
1244 PARAMS ((bfd
*, Elf_Internal_Sym
*, asection
**, bfd_vma
));
1245 extern bfd_vma _bfd_elf_section_offset
1246 PARAMS ((bfd
*, struct bfd_link_info
*, asection
*, bfd_vma
));
1248 extern unsigned long bfd_elf_hash
1249 PARAMS ((const char *));
1251 extern bfd_reloc_status_type bfd_elf_generic_reloc
1252 PARAMS ((bfd
*, arelent
*, asymbol
*, PTR
, asection
*, bfd
*, char **));
1253 extern boolean bfd_elf_mkobject
1255 extern boolean bfd_elf_mkcorefile
1257 extern Elf_Internal_Shdr
*bfd_elf_find_section
1258 PARAMS ((bfd
*, char *));
1259 extern boolean _bfd_elf_make_section_from_shdr
1260 PARAMS ((bfd
*, Elf_Internal_Shdr
*, const char *));
1261 extern boolean _bfd_elf_make_section_from_phdr
1262 PARAMS ((bfd
*, Elf_Internal_Phdr
*, int, const char *));
1263 extern struct bfd_hash_entry
*_bfd_elf_link_hash_newfunc
1264 PARAMS ((struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *));
1265 extern struct bfd_link_hash_table
*_bfd_elf_link_hash_table_create
1267 extern void _bfd_elf_link_hash_copy_indirect
1268 PARAMS ((struct elf_link_hash_entry
*, struct elf_link_hash_entry
*));
1269 extern void _bfd_elf_link_hash_hide_symbol
1270 PARAMS ((struct bfd_link_info
*, struct elf_link_hash_entry
*, boolean
));
1271 extern boolean _bfd_elf_link_hash_table_init
1272 PARAMS ((struct elf_link_hash_table
*, bfd
*,
1273 struct bfd_hash_entry
*(*) (struct bfd_hash_entry
*,
1274 struct bfd_hash_table
*,
1276 extern boolean _bfd_elf_slurp_version_tables
1278 extern boolean _bfd_elf_merge_sections
1279 PARAMS ((bfd
*, struct bfd_link_info
*));
1280 extern boolean bfd_elf_discard_group
1281 PARAMS ((bfd
*, struct sec
*));
1282 extern void bfd_elf_set_group_contents
1283 PARAMS ((bfd
*, asection
*, PTR
));
1284 extern void _bfd_elf_link_just_syms
1285 PARAMS ((asection
*, struct bfd_link_info
*));
1286 extern boolean _bfd_elf_copy_private_symbol_data
1287 PARAMS ((bfd
*, asymbol
*, bfd
*, asymbol
*));
1288 extern boolean _bfd_elf_copy_private_section_data
1289 PARAMS ((bfd
*, asection
*, bfd
*, asection
*));
1290 extern boolean _bfd_elf_write_object_contents
1292 extern boolean _bfd_elf_write_corefile_contents
1294 extern boolean _bfd_elf_set_section_contents
1295 PARAMS ((bfd
*, sec_ptr
, PTR
, file_ptr
, bfd_size_type
));
1296 extern long _bfd_elf_get_symtab_upper_bound
1298 extern long _bfd_elf_get_symtab
1299 PARAMS ((bfd
*, asymbol
**));
1300 extern long _bfd_elf_get_dynamic_symtab_upper_bound
1302 extern long _bfd_elf_canonicalize_dynamic_symtab
1303 PARAMS ((bfd
*, asymbol
**));
1304 extern long _bfd_elf_get_reloc_upper_bound
1305 PARAMS ((bfd
*, sec_ptr
));
1306 extern long _bfd_elf_canonicalize_reloc
1307 PARAMS ((bfd
*, sec_ptr
, arelent
**, asymbol
**));
1308 extern long _bfd_elf_get_dynamic_reloc_upper_bound
1310 extern long _bfd_elf_canonicalize_dynamic_reloc
1311 PARAMS ((bfd
*, arelent
**, asymbol
**));
1312 extern asymbol
*_bfd_elf_make_empty_symbol
1314 extern void _bfd_elf_get_symbol_info
1315 PARAMS ((bfd
*, asymbol
*, symbol_info
*));
1316 extern boolean _bfd_elf_is_local_label_name
1317 PARAMS ((bfd
*, const char *));
1318 extern alent
*_bfd_elf_get_lineno
1319 PARAMS ((bfd
*, asymbol
*));
1320 extern boolean _bfd_elf_set_arch_mach
1321 PARAMS ((bfd
*, enum bfd_architecture
, unsigned long));
1322 extern boolean _bfd_elf_find_nearest_line
1323 PARAMS ((bfd
*, asection
*, asymbol
**, bfd_vma
, const char **,
1324 const char **, unsigned int *));
1325 #define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols
1326 #define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
1327 extern int _bfd_elf_sizeof_headers
1328 PARAMS ((bfd
*, boolean
));
1329 extern boolean _bfd_elf_new_section_hook
1330 PARAMS ((bfd
*, asection
*));
1331 extern boolean _bfd_elf_init_reloc_shdr
1332 PARAMS ((bfd
*, Elf_Internal_Shdr
*, asection
*, boolean
));
1334 /* If the target doesn't have reloc handling written yet: */
1335 extern void _bfd_elf_no_info_to_howto
1336 PARAMS ((bfd
*, arelent
*, Elf_Internal_Rela
*));
1338 extern boolean bfd_section_from_shdr
1339 PARAMS ((bfd
*, unsigned int shindex
));
1340 extern boolean bfd_section_from_phdr
1341 PARAMS ((bfd
*, Elf_Internal_Phdr
*, int));
1343 extern int _bfd_elf_symbol_from_bfd_symbol
1344 PARAMS ((bfd
*, asymbol
**));
1346 extern asection
*bfd_section_from_r_symndx
1347 PARAMS ((bfd
*, struct sym_sec_cache
*, asection
*, unsigned long));
1348 extern asection
*bfd_section_from_elf_index
1349 PARAMS ((bfd
*, unsigned int));
1350 extern boolean _bfd_elf_create_dynamic_sections
1351 PARAMS ((bfd
*, struct bfd_link_info
*));
1352 extern struct bfd_strtab_hash
*_bfd_elf_stringtab_init
1355 extern struct elf_strtab_hash
* _bfd_elf_strtab_init
1357 extern void _bfd_elf_strtab_free
1358 PARAMS ((struct elf_strtab_hash
*));
1359 extern bfd_size_type _bfd_elf_strtab_add
1360 PARAMS ((struct elf_strtab_hash
*, const char *, boolean
));
1361 extern void _bfd_elf_strtab_addref
1362 PARAMS ((struct elf_strtab_hash
*, bfd_size_type
));
1363 extern void _bfd_elf_strtab_delref
1364 PARAMS ((struct elf_strtab_hash
*, bfd_size_type
));
1365 extern void _bfd_elf_strtab_clear_all_refs
1366 PARAMS ((struct elf_strtab_hash
*));
1367 extern bfd_size_type _bfd_elf_strtab_size
1368 PARAMS ((struct elf_strtab_hash
*));
1369 extern bfd_size_type _bfd_elf_strtab_offset
1370 PARAMS ((struct elf_strtab_hash
*, bfd_size_type
));
1371 extern boolean _bfd_elf_strtab_emit
1372 PARAMS ((bfd
*, struct elf_strtab_hash
*));
1373 extern void _bfd_elf_strtab_finalize
1374 PARAMS ((struct elf_strtab_hash
*));
1376 extern boolean _bfd_elf_discard_section_eh_frame
1377 PARAMS ((bfd
*, struct bfd_link_info
*, asection
*, asection
*,
1378 boolean (*) (bfd_vma
, PTR
), struct elf_reloc_cookie
*));
1379 extern boolean _bfd_elf_discard_section_eh_frame_hdr
1380 PARAMS ((bfd
*, struct bfd_link_info
*, asection
*));
1381 extern bfd_vma _bfd_elf_eh_frame_section_offset
1382 PARAMS ((bfd
*, asection
*, bfd_vma
));
1383 extern boolean _bfd_elf_write_section_eh_frame
1384 PARAMS ((bfd
*, asection
*, asection
*, bfd_byte
*));
1385 extern boolean _bfd_elf_write_section_eh_frame_hdr
1386 PARAMS ((bfd
*, asection
*));
1387 extern boolean _bfd_elf_maybe_strip_eh_frame_hdr
1388 PARAMS ((struct bfd_link_info
*));
1390 extern boolean _bfd_elf_link_record_dynamic_symbol
1391 PARAMS ((struct bfd_link_info
*, struct elf_link_hash_entry
*));
1392 extern long _bfd_elf_link_lookup_local_dynindx
1393 PARAMS ((struct bfd_link_info
*, bfd
*, long));
1394 extern boolean _bfd_elf_compute_section_file_positions
1395 PARAMS ((bfd
*, struct bfd_link_info
*));
1396 extern void _bfd_elf_assign_file_positions_for_relocs
1398 extern file_ptr _bfd_elf_assign_file_position_for_section
1399 PARAMS ((Elf_Internal_Shdr
*, file_ptr
, boolean
));
1401 extern boolean _bfd_elf_validate_reloc
1402 PARAMS ((bfd
*, arelent
*));
1404 extern boolean _bfd_elf_create_dynamic_sections
1405 PARAMS ((bfd
*, struct bfd_link_info
*));
1406 extern boolean _bfd_elf_create_got_section
1407 PARAMS ((bfd
*, struct bfd_link_info
*));
1408 extern unsigned long _bfd_elf_link_renumber_dynsyms
1409 PARAMS ((bfd
*, struct bfd_link_info
*));
1411 extern boolean _bfd_elfcore_make_pseudosection
1412 PARAMS ((bfd
*, char *, size_t, ufile_ptr
));
1413 extern char *_bfd_elfcore_strndup
1414 PARAMS ((bfd
*, char *, size_t));
1416 extern elf_linker_section_t
*_bfd_elf_create_linker_section
1417 PARAMS ((bfd
*, struct bfd_link_info
*, enum elf_linker_section_enum
,
1418 elf_linker_section_t
*));
1420 extern elf_linker_section_pointers_t
*_bfd_elf_find_pointer_linker_section
1421 PARAMS ((elf_linker_section_pointers_t
*, bfd_vma
,
1422 elf_linker_section_enum_t
));
1424 extern boolean bfd_elf32_create_pointer_linker_section
1425 PARAMS ((bfd
*, struct bfd_link_info
*, elf_linker_section_t
*,
1426 struct elf_link_hash_entry
*, const Elf32_Internal_Rela
*));
1428 extern bfd_vma bfd_elf32_finish_pointer_linker_section
1429 PARAMS ((bfd
*, bfd
*, struct bfd_link_info
*, elf_linker_section_t
*,
1430 struct elf_link_hash_entry
*, bfd_vma
,
1431 const Elf32_Internal_Rela
*, int));
1433 extern boolean bfd_elf64_create_pointer_linker_section
1434 PARAMS ((bfd
*, struct bfd_link_info
*, elf_linker_section_t
*,
1435 struct elf_link_hash_entry
*, const Elf64_Internal_Rela
*));
1437 extern bfd_vma bfd_elf64_finish_pointer_linker_section
1438 PARAMS ((bfd
*, bfd
*, struct bfd_link_info
*, elf_linker_section_t
*,
1439 struct elf_link_hash_entry
*, bfd_vma
,
1440 const Elf64_Internal_Rela
*, int));
1442 extern boolean _bfd_elf_make_linker_section_rela
1443 PARAMS ((bfd
*, elf_linker_section_t
*, int));
1445 extern const bfd_target
*bfd_elf32_object_p
1447 extern const bfd_target
*bfd_elf32_core_file_p
1449 extern char *bfd_elf32_core_file_failing_command
1451 extern int bfd_elf32_core_file_failing_signal
1453 extern boolean bfd_elf32_core_file_matches_executable_p
1454 PARAMS ((bfd
*, bfd
*));
1456 extern boolean bfd_elf32_bfd_link_add_symbols
1457 PARAMS ((bfd
*, struct bfd_link_info
*));
1458 extern boolean bfd_elf32_bfd_final_link
1459 PARAMS ((bfd
*, struct bfd_link_info
*));
1461 extern void bfd_elf32_swap_symbol_in
1462 PARAMS ((bfd
*, const PTR
, const PTR
, Elf_Internal_Sym
*));
1463 extern void bfd_elf32_swap_symbol_out
1464 PARAMS ((bfd
*, const Elf_Internal_Sym
*, PTR
, PTR
));
1465 extern void bfd_elf32_swap_reloc_in
1466 PARAMS ((bfd
*, const Elf32_External_Rel
*, Elf_Internal_Rel
*));
1467 extern void bfd_elf32_swap_reloc_out
1468 PARAMS ((bfd
*, const Elf_Internal_Rel
*, Elf32_External_Rel
*));
1469 extern void bfd_elf32_swap_reloca_in
1470 PARAMS ((bfd
*, const Elf32_External_Rela
*, Elf_Internal_Rela
*));
1471 extern void bfd_elf32_swap_reloca_out
1472 PARAMS ((bfd
*, const Elf_Internal_Rela
*, Elf32_External_Rela
*));
1473 extern void bfd_elf32_swap_phdr_in
1474 PARAMS ((bfd
*, const Elf32_External_Phdr
*, Elf_Internal_Phdr
*));
1475 extern void bfd_elf32_swap_phdr_out
1476 PARAMS ((bfd
*, const Elf_Internal_Phdr
*, Elf32_External_Phdr
*));
1477 extern void bfd_elf32_swap_dyn_in
1478 PARAMS ((bfd
*, const PTR
, Elf_Internal_Dyn
*));
1479 extern void bfd_elf32_swap_dyn_out
1480 PARAMS ((bfd
*, const Elf_Internal_Dyn
*, PTR
));
1481 extern long bfd_elf32_slurp_symbol_table
1482 PARAMS ((bfd
*, asymbol
**, boolean
));
1483 extern boolean bfd_elf32_write_shdrs_and_ehdr
1485 extern int bfd_elf32_write_out_phdrs
1486 PARAMS ((bfd
*, const Elf_Internal_Phdr
*, unsigned int));
1487 extern void bfd_elf32_write_relocs
1488 PARAMS ((bfd
*, asection
*, PTR
));
1489 extern boolean bfd_elf32_slurp_reloc_table
1490 PARAMS ((bfd
*, asection
*, asymbol
**, boolean
));
1491 extern boolean bfd_elf32_add_dynamic_entry
1492 PARAMS ((struct bfd_link_info
*, bfd_vma
, bfd_vma
));
1493 extern boolean bfd_elf32_link_create_dynamic_sections
1494 PARAMS ((bfd
*, struct bfd_link_info
*));
1495 extern Elf_Internal_Rela
*_bfd_elf32_link_read_relocs
1496 PARAMS ((bfd
*, asection
*, PTR
, Elf_Internal_Rela
*, boolean
));
1498 extern const bfd_target
*bfd_elf64_object_p
1500 extern const bfd_target
*bfd_elf64_core_file_p
1502 extern char *bfd_elf64_core_file_failing_command
1504 extern int bfd_elf64_core_file_failing_signal
1506 extern boolean bfd_elf64_core_file_matches_executable_p
1507 PARAMS ((bfd
*, bfd
*));
1508 extern boolean bfd_elf64_bfd_link_add_symbols
1509 PARAMS ((bfd
*, struct bfd_link_info
*));
1510 extern boolean bfd_elf64_bfd_final_link
1511 PARAMS ((bfd
*, struct bfd_link_info
*));
1513 extern void bfd_elf64_swap_symbol_in
1514 PARAMS ((bfd
*, const PTR
, const PTR
, Elf_Internal_Sym
*));
1515 extern void bfd_elf64_swap_symbol_out
1516 PARAMS ((bfd
*, const Elf_Internal_Sym
*, PTR
, PTR
));
1517 extern void bfd_elf64_swap_reloc_in
1518 PARAMS ((bfd
*, const Elf64_External_Rel
*, Elf_Internal_Rel
*));
1519 extern void bfd_elf64_swap_reloc_out
1520 PARAMS ((bfd
*, const Elf_Internal_Rel
*, Elf64_External_Rel
*));
1521 extern void bfd_elf64_swap_reloca_in
1522 PARAMS ((bfd
*, const Elf64_External_Rela
*, Elf_Internal_Rela
*));
1523 extern void bfd_elf64_swap_reloca_out
1524 PARAMS ((bfd
*, const Elf_Internal_Rela
*, Elf64_External_Rela
*));
1525 extern void bfd_elf64_swap_phdr_in
1526 PARAMS ((bfd
*, const Elf64_External_Phdr
*, Elf_Internal_Phdr
*));
1527 extern void bfd_elf64_swap_phdr_out
1528 PARAMS ((bfd
*, const Elf_Internal_Phdr
*, Elf64_External_Phdr
*));
1529 extern void bfd_elf64_swap_dyn_in
1530 PARAMS ((bfd
*, const PTR
, Elf_Internal_Dyn
*));
1531 extern void bfd_elf64_swap_dyn_out
1532 PARAMS ((bfd
*, const Elf_Internal_Dyn
*, PTR
));
1533 extern long bfd_elf64_slurp_symbol_table
1534 PARAMS ((bfd
*, asymbol
**, boolean
));
1535 extern boolean bfd_elf64_write_shdrs_and_ehdr
1537 extern int bfd_elf64_write_out_phdrs
1538 PARAMS ((bfd
*, const Elf_Internal_Phdr
*, unsigned int));
1539 extern void bfd_elf64_write_relocs
1540 PARAMS ((bfd
*, asection
*, PTR
));
1541 extern boolean bfd_elf64_slurp_reloc_table
1542 PARAMS ((bfd
*, asection
*, asymbol
**, boolean
));
1543 extern boolean bfd_elf64_add_dynamic_entry
1544 PARAMS ((struct bfd_link_info
*, bfd_vma
, bfd_vma
));
1545 extern boolean bfd_elf64_link_create_dynamic_sections
1546 PARAMS ((bfd
*, struct bfd_link_info
*));
1547 extern Elf_Internal_Rela
*_bfd_elf64_link_read_relocs
1548 PARAMS ((bfd
*, asection
*, PTR
, Elf_Internal_Rela
*, boolean
));
1550 #define bfd_elf32_link_record_dynamic_symbol \
1551 _bfd_elf_link_record_dynamic_symbol
1552 #define bfd_elf64_link_record_dynamic_symbol \
1553 _bfd_elf_link_record_dynamic_symbol
1555 extern boolean _bfd_elf32_link_record_local_dynamic_symbol
1556 PARAMS ((struct bfd_link_info
*, bfd
*, long));
1557 extern boolean _bfd_elf64_link_record_local_dynamic_symbol
1558 PARAMS ((struct bfd_link_info
*, bfd
*, long));
1560 extern boolean _bfd_elf_close_and_cleanup
1562 extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn
1563 PARAMS ((bfd
*, arelent
*, struct symbol_cache_entry
*, PTR
,
1564 asection
*, bfd
*, char **));
1566 extern boolean _bfd_elf32_gc_sections
1567 PARAMS ((bfd
*, struct bfd_link_info
*));
1568 extern boolean _bfd_elf32_gc_common_finalize_got_offsets
1569 PARAMS ((bfd
*, struct bfd_link_info
*));
1570 extern boolean _bfd_elf32_gc_common_final_link
1571 PARAMS ((bfd
*, struct bfd_link_info
*));
1572 extern boolean _bfd_elf32_gc_record_vtinherit
1573 PARAMS ((bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
));
1574 extern boolean _bfd_elf32_gc_record_vtentry
1575 PARAMS ((bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
));
1577 extern boolean _bfd_elf64_gc_sections
1578 PARAMS ((bfd
*, struct bfd_link_info
*));
1579 extern boolean _bfd_elf64_gc_common_finalize_got_offsets
1580 PARAMS ((bfd
*, struct bfd_link_info
*));
1581 extern boolean _bfd_elf64_gc_common_final_link
1582 PARAMS ((bfd
*, struct bfd_link_info
*));
1583 extern boolean _bfd_elf64_gc_record_vtinherit
1584 PARAMS ((bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
));
1585 extern boolean _bfd_elf64_gc_record_vtentry
1586 PARAMS ((bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
));
1588 extern boolean _bfd_elf32_reloc_symbol_deleted_p
1589 PARAMS ((bfd_vma
, PTR
));
1590 extern boolean _bfd_elf64_reloc_symbol_deleted_p
1591 PARAMS ((bfd_vma
, PTR
));
1593 /* Exported interface for writing elf corefile notes. */
1594 extern char *elfcore_write_note
1595 PARAMS ((bfd
*, char *, int *, const char *, int, const PTR
, int));
1596 extern char *elfcore_write_prpsinfo
1597 PARAMS ((bfd
*, char *, int *, const char *, const char *));
1598 extern char *elfcore_write_prstatus
1599 PARAMS ((bfd
*, char *, int *, long, int, const PTR
));
1600 extern char * elfcore_write_pstatus
1601 PARAMS ((bfd
*, char *, int *, long, int, const PTR
));
1602 extern char *elfcore_write_prfpreg
1603 PARAMS ((bfd
*, char *, int *, const PTR
, int));
1604 extern char *elfcore_write_prxfpreg
1605 PARAMS ((bfd
*, char *, int *, const PTR
, int));
1606 extern char *elfcore_write_lwpstatus
1607 PARAMS ((bfd
*, char *, int *, long, int, const PTR
));
1609 /* SH ELF specific routine. */
1611 extern boolean _sh_elf_set_mach_from_flags
1614 #endif /* _LIBELF_H_ */