1 /* BFD back-end data structures for ELF files.
2 Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
3 2002, 2003, 2004, 2005, 2006 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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, 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. */
38 #define NAME(x, y) x ## 64 ## _ ## y
41 #define NAME(x, y) x ## 32 ## _ ## y
46 #define NAME(x, y) x ## NOSIZE ## _ ## y
49 #define ElfNAME(X) NAME(Elf,X)
50 #define elfNAME(X) NAME(elf,X)
52 /* Information held for an ELF symbol. The first field is the
53 corresponding asymbol. Every symbol is an ELF file is actually a
54 pointer to this structure, although it is often handled as a
55 pointer to an asymbol. */
61 /* ELF symbol information. */
62 Elf_Internal_Sym internal_elf_sym;
63 /* Backend specific information. */
66 unsigned int hppa_arg_reloc;
72 /* Version information. This is from an Elf_Internal_Versym
73 structure in a SHT_GNU_versym section. It is zero if there is no
74 version information. */
75 unsigned short version;
79 struct elf_strtab_hash;
83 /* ELF linker hash table entries. */
85 struct elf_link_hash_entry
87 struct bfd_link_hash_entry root;
89 /* Symbol index in output file. This is initialized to -1. It is
90 set to -2 if the symbol is used by a reloc. */
93 /* Symbol index as a dynamic symbol. Initialized to -1, and remains
94 -1 if this is not a dynamic symbol. */
95 /* ??? Note that this is consistently used as a synonym for tests
96 against whether we can perform various simplifying transformations
97 to the code. (E.g. changing a pc-relative jump to a PLT entry
98 into a pc-relative jump to the target function.) That test, which
99 is often relatively complex, and someplaces wrong or incomplete,
100 should really be replaced by a predicate in elflink.c.
102 End result: this field -1 does not indicate that the symbol is
103 not in the dynamic symbol table, but rather that the symbol is
104 not visible outside this DSO. */
107 /* If this symbol requires an entry in the global offset table, the
108 processor specific backend uses this field to track usage and
109 final offset. Two schemes are supported: The first assumes that
110 a symbol may only have one GOT entry, and uses REFCOUNT until
111 size_dynamic_sections, at which point the contents of the .got is
112 fixed. Afterward, if OFFSET is -1, then the symbol does not
113 require a global offset table entry. The second scheme allows
114 multiple GOT entries per symbol, managed via a linked list
115 pointed to by GLIST. */
118 bfd_signed_vma refcount;
120 struct got_entry *glist;
121 struct plt_entry *plist;
124 /* Same, but tracks a procedure linkage table entry. */
125 union gotplt_union plt;
130 /* Symbol type (STT_NOTYPE, STT_OBJECT, etc.). */
131 unsigned int type : 8;
133 /* Symbol st_other value, symbol visibility. */
134 unsigned int other : 8;
136 /* Symbol is referenced by a non-shared object. */
137 unsigned int ref_regular : 1;
138 /* Symbol is defined by a non-shared object. */
139 unsigned int def_regular : 1;
140 /* Symbol is referenced by a shared object. */
141 unsigned int ref_dynamic : 1;
142 /* Symbol is defined by a shared object. */
143 unsigned int def_dynamic : 1;
144 /* Symbol has a non-weak reference from a non-shared object. */
145 unsigned int ref_regular_nonweak : 1;
146 /* Dynamic symbol has been adjustd. */
147 unsigned int dynamic_adjusted : 1;
148 /* Symbol needs a copy reloc. */
149 unsigned int needs_copy : 1;
150 /* Symbol needs a procedure linkage table entry. */
151 unsigned int needs_plt : 1;
152 /* Symbol appears in a non-ELF input file. */
153 unsigned int non_elf : 1;
154 /* Symbol should be marked as hidden in the version information. */
155 unsigned int hidden : 1;
156 /* Symbol was forced to local scope due to a version script file. */
157 unsigned int forced_local : 1;
158 /* Symbol was marked during garbage collection. */
159 unsigned int mark : 1;
160 /* Symbol is referenced by a non-GOT/non-PLT relocation. This is
161 not currently set by all the backends. */
162 unsigned int non_got_ref : 1;
163 /* Symbol has a definition in a shared object.
164 FIXME: There is no real need for this field if def_dynamic is never
165 cleared and all places that test def_dynamic also test def_regular. */
166 unsigned int dynamic_def : 1;
167 /* Symbol is weak in all shared objects. */
168 unsigned int dynamic_weak : 1;
169 /* Symbol is referenced with a relocation where C/C++ pointer equality
171 unsigned int pointer_equality_needed : 1;
173 /* String table index in .dynstr if this is a dynamic symbol. */
174 unsigned long dynstr_index;
178 /* If this is a weak defined symbol from a dynamic object, this
179 field points to a defined symbol with the same value, if there is
180 one. Otherwise it is NULL. */
181 struct elf_link_hash_entry *weakdef;
183 /* Hash value of the name computed using the ELF hash function.
184 Used part way through size_dynamic_sections, after we've finished
186 unsigned long elf_hash_value;
189 /* Version information. */
192 /* This field is used for a symbol which is not defined in a
193 regular object. It points to the version information read in
194 from the dynamic object. */
195 Elf_Internal_Verdef *verdef;
196 /* This field is used for a symbol which is defined in a regular
197 object. It is set up in size_dynamic_sections. It points to
198 the version information we should write out for this symbol. */
199 struct bfd_elf_version_tree *vertree;
204 /* Virtual table entry use information. This array is nominally of size
205 size/sizeof(target_void_pointer), though we have to be able to assume
206 and track a size while the symbol is still undefined. It is indexed
207 via offset/sizeof(target_void_pointer). */
211 /* Virtual table derivation info. */
212 struct elf_link_hash_entry *parent;
216 /* Will references to this symbol always reference the symbol
217 in this object? STV_PROTECTED is excluded from the visibility test
218 here so that function pointer comparisons work properly. Since
219 function symbols not defined in an app are set to their .plt entry,
220 it's necessary for shared libs to also reference the .plt even
221 though the symbol is really local to the shared lib. */
222 #define SYMBOL_REFERENCES_LOCAL(INFO, H) \
223 _bfd_elf_symbol_refs_local_p (H, INFO, 0)
225 /* Will _calls_ to this symbol always call the version in this object? */
226 #define SYMBOL_CALLS_LOCAL(INFO, H) \
227 _bfd_elf_symbol_refs_local_p (H, INFO, 1)
229 /* Common symbols that are turned into definitions don't have the
230 DEF_REGULAR flag set, so they might appear to be undefined. */
231 #define ELF_COMMON_DEF_P(H) \
233 && !(H)->def_dynamic \
234 && (H)->root.type == bfd_link_hash_defined)
236 /* Records local symbols to be emitted in the dynamic symbol table. */
238 struct elf_link_local_dynamic_entry
240 struct elf_link_local_dynamic_entry *next;
242 /* The input bfd this symbol came from. */
245 /* The index of the local symbol being copied. */
248 /* The index in the outgoing dynamic symbol table. */
251 /* A copy of the input symbol. */
252 Elf_Internal_Sym isym;
255 struct elf_link_loaded_list
257 struct elf_link_loaded_list *next;
261 /* Structures used by the eh_frame optimization code. */
270 struct cie_header hdr;
271 unsigned char version;
272 char augmentation[20];
274 bfd_signed_vma data_align;
276 bfd_vma augmentation_size;
277 struct elf_link_hash_entry *personality;
278 unsigned char per_encoding;
279 unsigned char lsda_encoding;
280 unsigned char fde_encoding;
281 unsigned char initial_insn_length;
282 unsigned char make_relative;
283 unsigned char make_lsda_relative;
284 unsigned char initial_instructions[50];
289 /* For FDEs, this points to the CIE used. */
290 struct eh_cie_fde *cie_inf;
293 unsigned int new_offset;
294 unsigned char fde_encoding;
295 unsigned char lsda_encoding;
296 unsigned char lsda_offset;
297 unsigned int cie : 1;
298 unsigned int removed : 1;
299 unsigned int add_augmentation_size : 1;
300 unsigned int add_fde_encoding : 1;
301 unsigned int make_relative : 1;
302 unsigned int make_lsda_relative : 1;
303 unsigned int need_lsda_relative : 1;
304 unsigned int per_encoding_relative : 1;
307 struct eh_frame_sec_info
310 unsigned int alloced;
311 struct eh_cie_fde entry[1];
314 struct eh_frame_array_ent
320 struct eh_frame_hdr_info
323 asection *last_cie_sec;
324 struct eh_cie_fde *last_cie_inf;
326 unsigned int fde_count, array_count;
327 struct eh_frame_array_ent *array;
328 /* TRUE if .eh_frame_hdr should contain the sorted search table.
329 We build it if we successfully read all .eh_frame input sections
330 and recognize them. */
332 bfd_boolean offsets_adjusted;
335 /* ELF linker hash table. */
337 struct elf_link_hash_table
339 struct bfd_link_hash_table root;
341 /* Whether we have created the special dynamic sections required
342 when linking against or generating a shared object. */
343 bfd_boolean dynamic_sections_created;
345 /* The BFD used to hold special sections created by the linker.
346 This will be the first BFD found which requires these sections to
350 /* The value to use when initialising got.refcount/offset and
351 plt.refcount/offset in an elf_link_hash_entry. Set to zero when
352 the values are refcounts. Set to init_got_offset/init_plt_offset
353 in size_dynamic_sections when the values may be offsets. */
354 union gotplt_union init_got_refcount;
355 union gotplt_union init_plt_refcount;
357 /* The value to use for got.refcount/offset and plt.refcount/offset
358 when the values may be offsets. Normally (bfd_vma) -1. */
359 union gotplt_union init_got_offset;
360 union gotplt_union init_plt_offset;
362 /* The number of symbols found in the link which must be put into
363 the .dynsym section. */
364 bfd_size_type dynsymcount;
366 /* The string table of dynamic symbols, which becomes the .dynstr
368 struct elf_strtab_hash *dynstr;
370 /* The number of buckets in the hash table in the .hash section.
371 This is based on the number of dynamic symbols. */
372 bfd_size_type bucketcount;
374 /* A linked list of DT_NEEDED names found in dynamic objects
375 included in the link. */
376 struct bfd_link_needed_list *needed;
378 /* The _GLOBAL_OFFSET_TABLE_ symbol. */
379 struct elf_link_hash_entry *hgot;
381 /* The _PROCEDURE_LINKAGE_TABLE_ symbol. */
382 struct elf_link_hash_entry *hplt;
384 /* A pointer to information used to merge SEC_MERGE sections. */
387 /* Used to link stabs in sections. */
388 struct stab_info stab_info;
390 /* Used by eh_frame code when editing .eh_frame. */
391 struct eh_frame_hdr_info eh_info;
393 /* A linked list of local symbols to be added to .dynsym. */
394 struct elf_link_local_dynamic_entry *dynlocal;
396 /* A linked list of DT_RPATH/DT_RUNPATH names found in dynamic
397 objects included in the link. */
398 struct bfd_link_needed_list *runpath;
400 /* Cached first output tls section and size of PT_TLS segment. */
402 bfd_size_type tls_size;
404 /* A linked list of BFD's loaded in the link. */
405 struct elf_link_loaded_list *loaded;
407 /* True if this target has relocatable executables, so needs dynamic
409 bfd_boolean is_relocatable_executable;
412 /* Look up an entry in an ELF linker hash table. */
414 #define elf_link_hash_lookup(table, string, create, copy, follow) \
415 ((struct elf_link_hash_entry *) \
416 bfd_link_hash_lookup (&(table)->root, (string), (create), \
419 /* Traverse an ELF linker hash table. */
421 #define elf_link_hash_traverse(table, func, info) \
422 (bfd_link_hash_traverse \
424 (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func), \
427 /* Get the ELF linker hash table from a link_info structure. */
429 #define elf_hash_table(p) ((struct elf_link_hash_table *) ((p)->hash))
431 /* Returns TRUE if the hash table is a struct elf_link_hash_table. */
432 #define is_elf_hash_table(htab) \
433 (((struct bfd_link_hash_table *) (htab))->type == bfd_link_elf_hash_table)
435 /* Used by bfd_section_from_r_symndx to cache a small number of local
436 symbol to section mappings. */
437 #define LOCAL_SYM_CACHE_SIZE 32
441 unsigned long indx[LOCAL_SYM_CACHE_SIZE];
442 asection *sec[LOCAL_SYM_CACHE_SIZE];
445 /* Constant information held for an ELF backend. */
447 struct elf_size_info {
448 unsigned char sizeof_ehdr, sizeof_phdr, sizeof_shdr;
449 unsigned char sizeof_rel, sizeof_rela, sizeof_sym, sizeof_dyn, sizeof_note;
451 /* The size of entries in the .hash section. */
452 unsigned char sizeof_hash_entry;
454 /* The number of internal relocations to allocate per external
456 unsigned char int_rels_per_ext_rel;
457 /* We use some fixed size arrays. This should be large enough to
458 handle all back-ends. */
459 #define MAX_INT_RELS_PER_EXT_REL 3
461 unsigned char arch_size, log_file_align;
462 unsigned char elfclass, ev_current;
463 int (*write_out_phdrs)
464 (bfd *, const Elf_Internal_Phdr *, unsigned int);
466 (*write_shdrs_and_ehdr) (bfd *);
468 (bfd *, asection *, void *);
469 void (*swap_symbol_in)
470 (bfd *, const void *, const void *, Elf_Internal_Sym *);
471 void (*swap_symbol_out)
472 (bfd *, const Elf_Internal_Sym *, void *, void *);
473 bfd_boolean (*slurp_reloc_table)
474 (bfd *, asection *, asymbol **, bfd_boolean);
475 long (*slurp_symbol_table)
476 (bfd *, asymbol **, bfd_boolean);
478 (bfd *, const void *, Elf_Internal_Dyn *);
480 (bfd *, const Elf_Internal_Dyn *, void *);
482 /* This function is called to swap in a REL relocation. If an
483 external relocation corresponds to more than one internal
484 relocation, then all relocations are swapped in at once. */
485 void (*swap_reloc_in)
486 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
488 /* This function is called to swap out a REL relocation. */
489 void (*swap_reloc_out)
490 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
492 /* This function is called to swap in a RELA relocation. If an
493 external relocation corresponds to more than one internal
494 relocation, then all relocations are swapped in at once. */
495 void (*swap_reloca_in)
496 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
498 /* This function is called to swap out a RELA relocation. */
499 void (*swap_reloca_out)
500 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
503 #define elf_symbol_from(ABFD,S) \
504 (((S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \
505 && (S)->the_bfd->tdata.elf_obj_data != 0) \
506 ? (elf_symbol_type *) (S) \
509 enum elf_reloc_type_class {
511 reloc_class_relative,
516 struct elf_reloc_cookie
518 Elf_Internal_Rela *rels, *rel, *relend;
519 Elf_Internal_Sym *locsyms;
523 struct elf_link_hash_entry **sym_hashes;
525 bfd_boolean bad_symtab;
528 /* The level of IRIX compatibility we're striving for. */
536 /* Mapping of ELF section names and types. */
537 struct bfd_elf_special_section
541 /* 0 means name must match PREFIX exactly.
542 -1 means name must start with PREFIX followed by an arbitrary string.
543 -2 means name must match PREFIX exactly or consist of PREFIX followed
544 by a dot then anything.
545 > 0 means name must start with the first PREFIX_LENGTH chars of
546 PREFIX and finish with the last SUFFIX_LENGTH chars of PREFIX. */
552 enum action_discarded
558 struct elf_backend_data
560 /* The architecture for this backend. */
561 enum bfd_architecture arch;
563 /* The ELF machine code (EM_xxxx) for this backend. */
564 int elf_machine_code;
566 /* The maximum page size for this backend. */
569 /* The minimum page size for this backend. An input object will not be
570 considered page aligned unless its sections are correctly aligned for
571 pages at least this large. May be smaller than maxpagesize. */
574 /* The common page size for this backend. */
575 bfd_vma commonpagesize;
577 /* The BFD flags applied to sections created for dynamic linking. */
578 flagword dynamic_sec_flags;
580 /* A function to translate an ELF RELA relocation to a BFD arelent
582 void (*elf_info_to_howto)
583 (bfd *, arelent *, Elf_Internal_Rela *);
585 /* A function to translate an ELF REL relocation to a BFD arelent
587 void (*elf_info_to_howto_rel)
588 (bfd *, arelent *, Elf_Internal_Rela *);
590 /* A function to determine whether a symbol is global when
591 partitioning the symbol table into local and global symbols.
592 This should be NULL for most targets, in which case the correct
593 thing will be done. MIPS ELF, at least on the Irix 5, has
594 special requirements. */
595 bfd_boolean (*elf_backend_sym_is_global)
598 /* The remaining functions are hooks which are called only if they
601 /* A function to permit a backend specific check on whether a
602 particular BFD format is relevant for an object file, and to
603 permit the backend to set any global information it wishes. When
604 this is called elf_elfheader is set, but anything else should be
605 used with caution. If this returns FALSE, the check_format
606 routine will return a bfd_error_wrong_format error. */
607 bfd_boolean (*elf_backend_object_p)
610 /* A function to do additional symbol processing when reading the
611 ELF symbol table. This is where any processor-specific special
612 section indices are handled. */
613 void (*elf_backend_symbol_processing)
616 /* A function to do additional symbol processing after reading the
617 entire ELF symbol table. */
618 bfd_boolean (*elf_backend_symbol_table_processing)
619 (bfd *, elf_symbol_type *, unsigned int);
621 /* A function to set the type of the info field. Processor-specific
622 types should be handled here. */
623 int (*elf_backend_get_symbol_type)
624 (Elf_Internal_Sym *, int);
626 /* A function to return the linker hash table entry of a symbol that
627 might be satisfied by an archive symbol. */
628 struct elf_link_hash_entry * (*elf_backend_archive_symbol_lookup)
629 (bfd *, struct bfd_link_info *, const char *);
631 /* Return true if local section symbols should have a non-null st_name.
632 NULL implies false. */
633 bfd_boolean (*elf_backend_name_local_section_symbols)
636 /* A function to do additional processing on the ELF section header
637 just before writing it out. This is used to set the flags and
638 type fields for some sections, or to actually write out data for
640 bfd_boolean (*elf_backend_section_processing)
641 (bfd *, Elf_Internal_Shdr *);
643 /* A function to handle unusual section types when creating BFD
644 sections from ELF sections. */
645 bfd_boolean (*elf_backend_section_from_shdr)
646 (bfd *, Elf_Internal_Shdr *, const char *, int);
648 /* A function to convert machine dependent ELF section header flags to
649 BFD internal section header flags. */
650 bfd_boolean (*elf_backend_section_flags)
651 (flagword *, const Elf_Internal_Shdr *);
653 /* A function that returns a struct containing ELF section flags and
654 type for the given BFD section. */
655 const struct bfd_elf_special_section * (*get_sec_type_attr)
658 /* A function to handle unusual program segment types when creating BFD
659 sections from ELF program segments. */
660 bfd_boolean (*elf_backend_section_from_phdr)
661 (bfd *, Elf_Internal_Phdr *, int, const char *);
663 /* A function to set up the ELF section header for a BFD section in
664 preparation for writing it out. This is where the flags and type
665 fields are set for unusual sections. */
666 bfd_boolean (*elf_backend_fake_sections)
667 (bfd *, Elf_Internal_Shdr *, asection *);
669 /* A function to get the ELF section index for a BFD section. If
670 this returns TRUE, the section was found. If it is a normal ELF
671 section, *RETVAL should be left unchanged. If it is not a normal
672 ELF section *RETVAL should be set to the SHN_xxxx index. */
673 bfd_boolean (*elf_backend_section_from_bfd_section)
674 (bfd *, asection *, int *retval);
676 /* If this field is not NULL, it is called by the add_symbols phase
677 of a link just before adding a symbol to the global linker hash
678 table. It may modify any of the fields as it wishes. If *NAME
679 is set to NULL, the symbol will be skipped rather than being
680 added to the hash table. This function is responsible for
681 handling all processor dependent symbol bindings and section
682 indices, and must set at least *FLAGS and *SEC for each processor
683 dependent case; failure to do so will cause a link error. */
684 bfd_boolean (*elf_add_symbol_hook)
685 (bfd *abfd, struct bfd_link_info *info, Elf_Internal_Sym *,
686 const char **name, flagword *flags, asection **sec, bfd_vma *value);
688 /* If this field is not NULL, it is called by the elf_link_output_sym
689 phase of a link for each symbol which will appear in the object file. */
690 bfd_boolean (*elf_backend_link_output_symbol_hook)
691 (struct bfd_link_info *info, const char *, Elf_Internal_Sym *,
692 asection *, struct elf_link_hash_entry *);
694 /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend
695 linker the first time it encounters a dynamic object in the link.
696 This function must create any sections required for dynamic
697 linking. The ABFD argument is a dynamic object. The .interp,
698 .dynamic, .dynsym, .dynstr, and .hash functions have already been
699 created, and this function may modify the section flags if
700 desired. This function will normally create the .got and .plt
701 sections, but different backends have different requirements. */
702 bfd_boolean (*elf_backend_create_dynamic_sections)
703 (bfd *abfd, struct bfd_link_info *info);
705 /* When creating a shared library, determine whether to omit the
706 dynamic symbol for the section. */
707 bfd_boolean (*elf_backend_omit_section_dynsym)
708 (bfd *output_bfd, struct bfd_link_info *info, asection *osec);
710 /* The CHECK_RELOCS function is called by the add_symbols phase of
711 the ELF backend linker. It is called once for each section with
712 relocs of an object file, just after the symbols for the object
713 file have been added to the global linker hash table. The
714 function must look through the relocs and do any special handling
715 required. This generally means allocating space in the global
716 offset table, and perhaps allocating space for a reloc. The
717 relocs are always passed as Rela structures; if the section
718 actually uses Rel structures, the r_addend field will always be
720 bfd_boolean (*check_relocs)
721 (bfd *abfd, struct bfd_link_info *info, asection *o,
722 const Elf_Internal_Rela *relocs);
724 /* The CHECK_DIRECTIVES function is called once per input file by
725 the add_symbols phase of the ELF backend linker. The function
726 must inspect the bfd and create any additional symbols according
727 to any custom directives in the bfd. */
728 bfd_boolean (*check_directives)
729 (bfd *abfd, struct bfd_link_info *info);
731 /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
732 linker for every symbol which is defined by a dynamic object and
733 referenced by a regular object. This is called after all the
734 input files have been seen, but before the SIZE_DYNAMIC_SECTIONS
735 function has been called. The hash table entry should be
736 bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be
737 defined in a section from a dynamic object. Dynamic object
738 sections are not included in the final link, and this function is
739 responsible for changing the value to something which the rest of
740 the link can deal with. This will normally involve adding an
741 entry to the .plt or .got or some such section, and setting the
742 symbol to point to that. */
743 bfd_boolean (*elf_backend_adjust_dynamic_symbol)
744 (struct bfd_link_info *info, struct elf_link_hash_entry *h);
746 /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker
747 after all the linker input files have been seen but before the
748 section sizes have been set. This is called after
749 ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS. */
750 bfd_boolean (*elf_backend_always_size_sections)
751 (bfd *output_bfd, struct bfd_link_info *info);
753 /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend
754 linker after all the linker input files have been seen but before
755 the sections sizes have been set. This is called after
756 ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols.
757 It is only called when linking against a dynamic object. It must
758 set the sizes of the dynamic sections, and may fill in their
759 contents as well. The generic ELF linker can handle the .dynsym,
760 .dynstr and .hash sections. This function must handle the
761 .interp section and any sections created by the
762 CREATE_DYNAMIC_SECTIONS entry point. */
763 bfd_boolean (*elf_backend_size_dynamic_sections)
764 (bfd *output_bfd, struct bfd_link_info *info);
766 /* The RELOCATE_SECTION function is called by the ELF backend linker
767 to handle the relocations for a section.
769 The relocs are always passed as Rela structures; if the section
770 actually uses Rel structures, the r_addend field will always be
773 This function is responsible for adjust the section contents as
774 necessary, and (if using Rela relocs and generating a
775 relocatable output file) adjusting the reloc addend as
778 This function does not have to worry about setting the reloc
779 address or the reloc symbol index.
781 LOCAL_SYMS is a pointer to the swapped in local symbols.
783 LOCAL_SECTIONS is an array giving the section in the input file
784 corresponding to the st_shndx field of each local symbol.
786 The global hash table entry for the global symbols can be found
787 via elf_sym_hashes (input_bfd).
789 When generating relocatable output, this function must handle
790 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
791 going to be the section symbol corresponding to the output
792 section, which means that the addend must be adjusted
794 bfd_boolean (*elf_backend_relocate_section)
795 (bfd *output_bfd, struct bfd_link_info *info, bfd *input_bfd,
796 asection *input_section, bfd_byte *contents, Elf_Internal_Rela *relocs,
797 Elf_Internal_Sym *local_syms, asection **local_sections);
799 /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend
800 linker just before it writes a symbol out to the .dynsym section.
801 The processor backend may make any required adjustment to the
802 symbol. It may also take the opportunity to set contents of the
803 dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on
804 all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called
805 on those symbols which are defined by a dynamic object. */
806 bfd_boolean (*elf_backend_finish_dynamic_symbol)
807 (bfd *output_bfd, struct bfd_link_info *info,
808 struct elf_link_hash_entry *h, Elf_Internal_Sym *sym);
810 /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend
811 linker just before it writes all the dynamic sections out to the
812 output file. The FINISH_DYNAMIC_SYMBOL will have been called on
813 all dynamic symbols. */
814 bfd_boolean (*elf_backend_finish_dynamic_sections)
815 (bfd *output_bfd, struct bfd_link_info *info);
817 /* A function to do any beginning processing needed for the ELF file
818 before building the ELF headers and computing file positions. */
819 void (*elf_backend_begin_write_processing)
820 (bfd *, struct bfd_link_info *);
822 /* A function to do any final processing needed for the ELF file
823 before writing it out. The LINKER argument is TRUE if this BFD
824 was created by the ELF backend linker. */
825 void (*elf_backend_final_write_processing)
826 (bfd *, bfd_boolean linker);
828 /* This function is called by get_program_header_size. It should
829 return the number of additional program segments which this BFD
830 will need. It should return -1 on error. */
831 int (*elf_backend_additional_program_headers)
832 (bfd *, struct bfd_link_info *);
834 /* This function is called to modify an existing segment map in a
835 backend specific fashion. */
836 bfd_boolean (*elf_backend_modify_segment_map)
837 (bfd *, struct bfd_link_info *);
839 /* This function is called to modify program headers just before
841 bfd_boolean (*elf_backend_modify_program_headers)
842 (bfd *, struct bfd_link_info *);
844 /* This function is called during section garbage collection to
845 mark sections that define global symbols. */
846 bfd_boolean (*gc_mark_dynamic_ref)
847 (struct elf_link_hash_entry *h, void *inf);
849 /* This function is called during section gc to discover the section a
850 particular relocation refers to. */
851 asection * (*gc_mark_hook)
852 (asection *sec, struct bfd_link_info *, Elf_Internal_Rela *,
853 struct elf_link_hash_entry *h, Elf_Internal_Sym *);
855 /* This function, if defined, is called during the sweep phase of gc
856 in order that a backend might update any data structures it might
858 bfd_boolean (*gc_sweep_hook)
859 (bfd *abfd, struct bfd_link_info *info, asection *o,
860 const Elf_Internal_Rela *relocs);
862 /* This function, if defined, is called after the ELF headers have
863 been created. This allows for things like the OS and ABI versions
865 void (*elf_backend_post_process_headers)
866 (bfd *, struct bfd_link_info *);
868 /* This function, if defined, prints a symbol to file and returns the
869 name of the symbol to be printed. It should return NULL to fall
870 back to default symbol printing. */
871 const char *(*elf_backend_print_symbol_all)
872 (bfd *, void *, asymbol *);
874 /* This function, if defined, is called after all local symbols and
875 global symbols converted to locals are emitted into the symtab
876 section. It allows the backend to emit special local symbols
877 not handled in the hash table. */
878 bfd_boolean (*elf_backend_output_arch_local_syms)
879 (bfd *, struct bfd_link_info *, void *,
880 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym *, asection *,
881 struct elf_link_hash_entry *));
883 /* This function, if defined, is called after all symbols are emitted
884 into the symtab section. It allows the backend to emit special
885 global symbols not handled in the hash table. */
886 bfd_boolean (*elf_backend_output_arch_syms)
887 (bfd *, struct bfd_link_info *, void *,
888 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym *, asection *,
889 struct elf_link_hash_entry *));
891 /* Copy any information related to dynamic linking from a pre-existing
892 symbol to a newly created symbol. Also called to copy flags and
893 other back-end info to a weakdef, in which case the symbol is not
894 newly created and plt/got refcounts and dynamic indices should not
896 void (*elf_backend_copy_indirect_symbol)
897 (struct bfd_link_info *, struct elf_link_hash_entry *,
898 struct elf_link_hash_entry *);
900 /* Modify any information related to dynamic linking such that the
901 symbol is not exported. */
902 void (*elf_backend_hide_symbol)
903 (struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean);
905 /* A function to do additional symbol fixup, called by
906 _bfd_elf_fix_symbol_flags. */
907 bfd_boolean (*elf_backend_fixup_symbol)
908 (struct bfd_link_info *, struct elf_link_hash_entry *);
910 /* Merge the backend specific symbol attribute. */
911 void (*elf_backend_merge_symbol_attribute)
912 (struct elf_link_hash_entry *, const Elf_Internal_Sym *, bfd_boolean,
915 /* Decide whether an undefined symbol is special and can be ignored.
916 This is the case for OPTIONAL symbols on IRIX. */
917 bfd_boolean (*elf_backend_ignore_undef_symbol)
918 (struct elf_link_hash_entry *);
920 /* Emit relocations. Overrides default routine for emitting relocs,
921 except during a relocatable link, or if all relocs are being emitted. */
922 bfd_boolean (*elf_backend_emit_relocs)
923 (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *,
924 struct elf_link_hash_entry **);
926 /* Count relocations. Not called for relocatable links
927 or if all relocs are being preserved in the output. */
928 unsigned int (*elf_backend_count_relocs)
929 (asection *, Elf_Internal_Rela *);
931 /* This function, if defined, is called when an NT_PRSTATUS note is found
933 bfd_boolean (*elf_backend_grok_prstatus)
934 (bfd *, Elf_Internal_Note *);
936 /* This function, if defined, is called when an NT_PSINFO or NT_PRPSINFO
937 note is found in a core file. */
938 bfd_boolean (*elf_backend_grok_psinfo)
939 (bfd *, Elf_Internal_Note *);
941 /* Functions to print VMAs. Special code to handle 64 bit ELF files. */
942 void (* elf_backend_sprintf_vma)
943 (bfd *, char *, bfd_vma);
944 void (* elf_backend_fprintf_vma)
945 (bfd *, void *, bfd_vma);
947 /* This function returns class of a reloc type. */
948 enum elf_reloc_type_class (*elf_backend_reloc_type_class)
949 (const Elf_Internal_Rela *);
951 /* This function, if defined, removes information about discarded functions
952 from other sections which mention them. */
953 bfd_boolean (*elf_backend_discard_info)
954 (bfd *, struct elf_reloc_cookie *, struct bfd_link_info *);
956 /* This function, if defined, signals that the function above has removed
957 the discarded relocations for this section. */
958 bfd_boolean (*elf_backend_ignore_discarded_relocs)
961 /* What to do when ld finds relocations against symbols defined in
962 discarded sections. */
963 unsigned int (*action_discarded)
966 /* This function returns the width of FDE pointers in bytes, or 0 if
967 that can't be determined for some reason. The default definition
968 goes by the bfd's EI_CLASS. */
969 unsigned int (*elf_backend_eh_frame_address_size)
972 /* These functions tell elf-eh-frame whether to attempt to turn
973 absolute or lsda encodings into pc-relative ones. The default
974 definition enables these transformations. */
975 bfd_boolean (*elf_backend_can_make_relative_eh_frame)
976 (bfd *, struct bfd_link_info *, asection *);
977 bfd_boolean (*elf_backend_can_make_lsda_relative_eh_frame)
978 (bfd *, struct bfd_link_info *, asection *);
980 /* This function returns an encoding after computing the encoded
981 value (and storing it in ENCODED) for the given OFFSET into OSEC,
982 to be stored in at LOC_OFFSET into the LOC_SEC input section.
983 The default definition chooses a 32-bit PC-relative encoding. */
984 bfd_byte (*elf_backend_encode_eh_address)
985 (bfd *abfd, struct bfd_link_info *info,
986 asection *osec, bfd_vma offset,
987 asection *loc_sec, bfd_vma loc_offset,
990 /* This function, if defined, may write out the given section.
991 Returns TRUE if it did so and FALSE if the caller should. */
992 bfd_boolean (*elf_backend_write_section)
993 (bfd *, asection *, bfd_byte *);
995 /* The level of IRIX compatibility we're striving for.
996 MIPS ELF specific function. */
997 irix_compat_t (*elf_backend_mips_irix_compat)
1000 reloc_howto_type *(*elf_backend_mips_rtype_to_howto)
1001 (unsigned int, bfd_boolean);
1003 /* The swapping table to use when dealing with ECOFF information.
1004 Used for the MIPS ELF .mdebug section. */
1005 const struct ecoff_debug_swap *elf_backend_ecoff_debug_swap;
1007 /* This function implements `bfd_elf_bfd_from_remote_memory';
1008 see elf.c, elfcode.h. */
1009 bfd *(*elf_backend_bfd_from_remote_memory)
1010 (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep,
1011 int (*target_read_memory) (bfd_vma vma, bfd_byte *myaddr, int len));
1013 /* This function is used by `_bfd_elf_get_synthetic_symtab';
1015 bfd_vma (*plt_sym_val) (bfd_vma, const asection *, const arelent *);
1017 /* Is symbol defined in common section? */
1018 bfd_boolean (*common_definition) (Elf_Internal_Sym *);
1020 /* Return a common section index for section. */
1021 unsigned int (*common_section_index) (asection *);
1023 /* Return a common section for section. */
1024 asection *(*common_section) (asection *);
1026 /* Return TRUE if we can merge 2 definitions. */
1027 bfd_boolean (*merge_symbol) (struct bfd_link_info *,
1028 struct elf_link_hash_entry **,
1029 struct elf_link_hash_entry *,
1030 Elf_Internal_Sym *, asection **,
1031 bfd_vma *, unsigned int *,
1032 bfd_boolean *, bfd_boolean *,
1033 bfd_boolean *, bfd_boolean *,
1034 bfd_boolean *, bfd_boolean *,
1035 bfd_boolean *, bfd_boolean *,
1037 bfd_boolean *, bfd_boolean *,
1038 bfd_boolean *, bfd_boolean *,
1039 bfd *, asection **);
1041 /* Used to handle bad SHF_LINK_ORDER input. */
1042 bfd_error_handler_type link_order_error_handler;
1044 /* Name of the PLT relocation section. */
1045 const char *relplt_name;
1047 /* Alternate EM_xxxx machine codes for this backend. */
1048 int elf_machine_alt1;
1049 int elf_machine_alt2;
1051 const struct elf_size_info *s;
1053 /* An array of target specific special sections. */
1054 const struct bfd_elf_special_section *special_sections;
1056 /* The size in bytes of the header for the GOT. This includes the
1057 so-called reserved entries on some systems. */
1058 bfd_vma got_header_size;
1060 /* This is TRUE if the linker should act like collect and gather
1061 global constructors and destructors by name. This is TRUE for
1062 MIPS ELF because the Irix 5 tools can not handle the .init
1064 unsigned collect : 1;
1066 /* This is TRUE if the linker should ignore changes to the type of a
1067 symbol. This is TRUE for MIPS ELF because some Irix 5 objects
1068 record undefined functions as STT_OBJECT although the definitions
1070 unsigned type_change_ok : 1;
1072 /* Whether the backend may use REL relocations. (Some backends use
1073 both REL and RELA relocations, and this flag is set for those
1075 unsigned may_use_rel_p : 1;
1077 /* Whether the backend may use RELA relocations. (Some backends use
1078 both REL and RELA relocations, and this flag is set for those
1080 unsigned may_use_rela_p : 1;
1082 /* Whether the default relocation type is RELA. If a backend with
1083 this flag set wants REL relocations for a particular section,
1084 it must note that explicitly. Similarly, if this flag is clear,
1085 and the backend wants RELA relocations for a particular
1087 unsigned default_use_rela_p : 1;
1089 /* Set if RELA relocations for a relocatable link can be handled by
1090 generic code. Backends that set this flag need do nothing in the
1091 backend relocate_section routine for relocatable linking. */
1092 unsigned rela_normal : 1;
1094 /* TRUE if addresses "naturally" sign extend. This is used when
1095 swapping in from Elf32 when BFD64. */
1096 unsigned sign_extend_vma : 1;
1098 unsigned want_got_plt : 1;
1099 unsigned plt_readonly : 1;
1100 unsigned want_plt_sym : 1;
1101 unsigned plt_not_loaded : 1;
1102 unsigned plt_alignment : 4;
1103 unsigned can_gc_sections : 1;
1104 unsigned can_refcount : 1;
1105 unsigned want_got_sym : 1;
1106 unsigned want_dynbss : 1;
1107 /* Targets which do not support physical addressing often require
1108 that the p_paddr field in the section header to be set to zero.
1109 This field indicates whether this behavior is required. */
1110 unsigned want_p_paddr_set_to_zero : 1;
1113 /* Information stored for each BFD section in an ELF file. This
1114 structure is allocated by elf_new_section_hook. */
1116 struct bfd_elf_section_data
1118 /* The ELF header for this section. */
1119 Elf_Internal_Shdr this_hdr;
1121 /* The ELF header for the reloc section associated with this
1123 Elf_Internal_Shdr rel_hdr;
1125 /* If there is a second reloc section associated with this section,
1126 as can happen on Irix 6, this field points to the header. */
1127 Elf_Internal_Shdr *rel_hdr2;
1129 /* The number of relocations currently assigned to REL_HDR. */
1130 unsigned int rel_count;
1132 /* The number of relocations currently assigned to REL_HDR2. */
1133 unsigned int rel_count2;
1135 /* The ELF section number of this section. */
1138 /* The ELF section number of the reloc section indicated by
1139 REL_HDR if any. Only used for an output file. */
1142 /* The ELF section number of the reloc section indicated by
1143 REL_HDR2 if any. Only used for an output file. */
1146 /* Used by the backend linker when generating a shared library to
1147 record the dynamic symbol index for a section symbol
1148 corresponding to this section. A value of 0 means that there is
1149 no dynamic symbol for this section. */
1152 /* A pointer to the linked-to section for SHF_LINK_ORDER. */
1153 asection *linked_to;
1155 /* Used by the backend linker to store the symbol hash table entries
1156 associated with relocs against global symbols. */
1157 struct elf_link_hash_entry **rel_hashes;
1159 /* A pointer to the swapped relocs. If the section uses REL relocs,
1160 rather than RELA, all the r_addend fields will be zero. This
1161 pointer may be NULL. It is used by the backend linker. */
1162 Elf_Internal_Rela *relocs;
1164 /* A pointer to a linked list tracking dynamic relocs copied for
1168 /* A pointer to the bfd section used for dynamic relocs. */
1172 /* Group name, if this section is a member of a group. */
1175 /* Group signature sym, if this is the SHT_GROUP section. */
1176 struct bfd_symbol *id;
1179 /* Optional information about section group; NULL if it doesn't
1180 belongs to any section group. */
1181 asection *sec_group;
1183 /* A linked list of sections in the group. Circular when used by
1185 asection *next_in_group;
1187 /* A pointer used for various section optimizations. */
1191 #define elf_section_data(sec) ((struct bfd_elf_section_data*)(sec)->used_by_bfd)
1192 #define elf_linked_to_section(sec) (elf_section_data(sec)->linked_to)
1193 #define elf_section_type(sec) (elf_section_data(sec)->this_hdr.sh_type)
1194 #define elf_section_flags(sec) (elf_section_data(sec)->this_hdr.sh_flags)
1195 #define elf_group_name(sec) (elf_section_data(sec)->group.name)
1196 #define elf_group_id(sec) (elf_section_data(sec)->group.id)
1197 #define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group)
1198 #define elf_sec_group(sec) (elf_section_data(sec)->sec_group)
1200 /* Return TRUE if section has been discarded. */
1201 #define elf_discarded_section(sec) \
1202 (!bfd_is_abs_section (sec) \
1203 && bfd_is_abs_section ((sec)->output_section) \
1204 && (sec)->sec_info_type != ELF_INFO_TYPE_MERGE \
1205 && (sec)->sec_info_type != ELF_INFO_TYPE_JUST_SYMS)
1207 #define xvec_get_elf_backend_data(xvec) \
1208 ((struct elf_backend_data *) (xvec)->backend_data)
1210 #define get_elf_backend_data(abfd) \
1211 xvec_get_elf_backend_data ((abfd)->xvec)
1213 /* This struct is used to pass information to routines called via
1214 elf_link_hash_traverse which must return failure. */
1216 struct elf_info_failed
1219 struct bfd_link_info *info;
1220 struct bfd_elf_version_tree *verdefs;
1223 /* This structure is used to pass information to
1224 _bfd_elf_link_assign_sym_version. */
1226 struct elf_assign_sym_version_info
1230 /* General link information. */
1231 struct bfd_link_info *info;
1233 struct bfd_elf_version_tree *verdefs;
1234 /* Whether we had a failure. */
1238 /* This structure is used to pass information to
1239 _bfd_elf_link_find_version_dependencies. */
1241 struct elf_find_verdep_info
1245 /* General link information. */
1246 struct bfd_link_info *info;
1247 /* The number of dependencies. */
1249 /* Whether we had a failure. */
1253 /* Some private data is stashed away for future use using the tdata pointer
1254 in the bfd structure. */
1256 struct elf_obj_tdata
1258 Elf_Internal_Ehdr elf_header[1]; /* Actual data, but ref like ptr */
1259 Elf_Internal_Shdr **elf_sect_ptr;
1260 Elf_Internal_Phdr *phdr;
1261 struct elf_segment_map *segment_map;
1262 struct elf_strtab_hash *strtab_ptr;
1265 unsigned int num_elf_sections; /* elf_sect_ptr size */
1266 int num_section_syms;
1267 asymbol **section_syms; /* STT_SECTION symbols for each section */
1268 Elf_Internal_Shdr symtab_hdr;
1269 Elf_Internal_Shdr shstrtab_hdr;
1270 Elf_Internal_Shdr strtab_hdr;
1271 Elf_Internal_Shdr dynsymtab_hdr;
1272 Elf_Internal_Shdr dynstrtab_hdr;
1273 Elf_Internal_Shdr dynversym_hdr;
1274 Elf_Internal_Shdr dynverref_hdr;
1275 Elf_Internal_Shdr dynverdef_hdr;
1276 Elf_Internal_Shdr symtab_shndx_hdr;
1277 unsigned int symtab_section, shstrtab_section;
1278 unsigned int strtab_section, dynsymtab_section;
1279 unsigned int symtab_shndx_section;
1280 unsigned int dynversym_section, dynverdef_section, dynverref_section;
1281 file_ptr next_file_pos;
1282 bfd_vma gp; /* The gp value */
1283 unsigned int gp_size; /* The gp size */
1285 /* Information grabbed from an elf core file. */
1292 /* A mapping from external symbols to entries in the linker hash
1293 table, used when linking. This is indexed by the symbol index
1294 minus the sh_info field of the symbol table header. */
1295 struct elf_link_hash_entry **sym_hashes;
1297 /* Track usage and final offsets of GOT entries for local symbols.
1298 This array is indexed by symbol index. Elements are used
1299 identically to "got" in struct elf_link_hash_entry. */
1302 bfd_signed_vma *refcounts;
1304 struct got_entry **ents;
1307 /* The linker ELF emulation code needs to let the backend ELF linker
1308 know what filename should be used for a dynamic object if the
1309 dynamic object is found using a search. The emulation code then
1310 sometimes needs to know what name was actually used. Until the
1311 file has been added to the linker symbol table, this field holds
1312 the name the linker wants. After it has been added, it holds the
1313 name actually used, which will be the DT_SONAME entry if there is
1315 const char *dt_name;
1317 /* Records the result of `get_program_header_size'. */
1318 bfd_size_type program_header_size;
1320 /* Used by find_nearest_line entry point. */
1323 /* Used by MIPS ELF find_nearest_line entry point. The structure
1324 could be included directly in this one, but there's no point to
1325 wasting the memory just for the infrequently called
1326 find_nearest_line. */
1327 struct mips_elf_find_line *find_line_info;
1329 /* A place to stash dwarf1 info for this bfd. */
1330 struct dwarf1_debug *dwarf1_find_line_info;
1332 /* A place to stash dwarf2 info for this bfd. */
1333 void *dwarf2_find_line_info;
1335 /* An array of stub sections indexed by symbol number, used by the
1336 MIPS ELF linker. FIXME: We should figure out some way to only
1337 include this field for a MIPS ELF target. */
1338 asection **local_stubs;
1340 /* Used to determine if PT_GNU_EH_FRAME segment header should be
1342 asection *eh_frame_hdr;
1344 Elf_Internal_Shdr **group_sect_ptr;
1347 /* Number of symbol version definitions we are about to emit. */
1348 unsigned int cverdefs;
1350 /* Number of symbol version references we are about to emit. */
1351 unsigned int cverrefs;
1353 /* Segment flags for the PT_GNU_STACK segment. */
1354 unsigned int stack_flags;
1356 /* Should the PT_GNU_RELRO segment be emitted? */
1359 /* Symbol version definitions in external objects. */
1360 Elf_Internal_Verdef *verdef;
1362 /* Symbol version references to external objects. */
1363 Elf_Internal_Verneed *verref;
1365 /* The Irix 5 support uses two virtual sections, which represent
1366 text/data symbols defined in dynamic objects. */
1367 asymbol *elf_data_symbol;
1368 asymbol *elf_text_symbol;
1369 asection *elf_data_section;
1370 asection *elf_text_section;
1372 /* Whether a dyanmic object was specified normally on the linker
1373 command line, or was specified when --as-needed was in effect,
1374 or was found via a DT_NEEDED entry. */
1375 enum dynamic_lib_link_class dyn_lib_class;
1377 /* This is set to TRUE if the object was created by the backend
1381 /* Irix 5 often screws up the symbol table, sorting local symbols
1382 after global symbols. This flag is set if the symbol table in
1383 this BFD appears to be screwed up. If it is, we ignore the
1384 sh_info field in the symbol table header, and always read all the
1386 bfd_boolean bad_symtab;
1388 /* Used to determine if the e_flags field has been initialized */
1389 bfd_boolean flags_init;
1392 #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
1393 #define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header)
1394 #define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr)
1395 #define elf_numsections(bfd) (elf_tdata(bfd) -> num_elf_sections)
1396 #define elf_shstrtab(bfd) (elf_tdata(bfd) -> strtab_ptr)
1397 #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section)
1398 #define elf_symtab_shndx(bfd) (elf_tdata(bfd) -> symtab_shndx_section)
1399 #define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section)
1400 #define elf_dynversym(bfd) (elf_tdata(bfd) -> dynversym_section)
1401 #define elf_dynverdef(bfd) (elf_tdata(bfd) -> dynverdef_section)
1402 #define elf_dynverref(bfd) (elf_tdata(bfd) -> dynverref_section)
1403 #define elf_num_locals(bfd) (elf_tdata(bfd) -> num_locals)
1404 #define elf_num_globals(bfd) (elf_tdata(bfd) -> num_globals)
1405 #define elf_section_syms(bfd) (elf_tdata(bfd) -> section_syms)
1406 #define elf_num_section_syms(bfd) (elf_tdata(bfd) -> num_section_syms)
1407 #define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
1408 #define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
1409 #define elf_gp(bfd) (elf_tdata(bfd) -> gp)
1410 #define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size)
1411 #define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes)
1412 #define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts)
1413 #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets)
1414 #define elf_local_got_ents(bfd) (elf_tdata(bfd) -> local_got.ents)
1415 #define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name)
1416 #define elf_dyn_lib_class(bfd) (elf_tdata(bfd) -> dyn_lib_class)
1417 #define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab)
1418 #define elf_flags_init(bfd) (elf_tdata(bfd) -> flags_init)
1420 extern void _bfd_elf_swap_verdef_in
1421 (bfd *, const Elf_External_Verdef *, Elf_Internal_Verdef *);
1422 extern void _bfd_elf_swap_verdef_out
1423 (bfd *, const Elf_Internal_Verdef *, Elf_External_Verdef *);
1424 extern void _bfd_elf_swap_verdaux_in
1425 (bfd *, const Elf_External_Verdaux *, Elf_Internal_Verdaux *);
1426 extern void _bfd_elf_swap_verdaux_out
1427 (bfd *, const Elf_Internal_Verdaux *, Elf_External_Verdaux *);
1428 extern void _bfd_elf_swap_verneed_in
1429 (bfd *, const Elf_External_Verneed *, Elf_Internal_Verneed *);
1430 extern void _bfd_elf_swap_verneed_out
1431 (bfd *, const Elf_Internal_Verneed *, Elf_External_Verneed *);
1432 extern void _bfd_elf_swap_vernaux_in
1433 (bfd *, const Elf_External_Vernaux *, Elf_Internal_Vernaux *);
1434 extern void _bfd_elf_swap_vernaux_out
1435 (bfd *, const Elf_Internal_Vernaux *, Elf_External_Vernaux *);
1436 extern void _bfd_elf_swap_versym_in
1437 (bfd *, const Elf_External_Versym *, Elf_Internal_Versym *);
1438 extern void _bfd_elf_swap_versym_out
1439 (bfd *, const Elf_Internal_Versym *, Elf_External_Versym *);
1441 extern int _bfd_elf_section_from_bfd_section
1442 (bfd *, asection *);
1443 extern char *bfd_elf_string_from_elf_section
1444 (bfd *, unsigned, unsigned);
1445 extern char *bfd_elf_get_str_section
1447 extern Elf_Internal_Sym *bfd_elf_get_elf_syms
1448 (bfd *, Elf_Internal_Shdr *, size_t, size_t, Elf_Internal_Sym *, void *,
1449 Elf_External_Sym_Shndx *);
1450 extern const char *bfd_elf_sym_name
1451 (bfd *, Elf_Internal_Shdr *, Elf_Internal_Sym *, asection *);
1453 extern bfd_boolean _bfd_elf_copy_private_bfd_data
1455 extern bfd_boolean _bfd_elf_print_private_bfd_data
1457 extern void bfd_elf_print_symbol
1458 (bfd *, void *, asymbol *, bfd_print_symbol_type);
1460 extern void _bfd_elf_sprintf_vma
1461 (bfd *, char *, bfd_vma);
1462 extern void _bfd_elf_fprintf_vma
1463 (bfd *, void *, bfd_vma);
1465 extern unsigned int _bfd_elf_eh_frame_address_size
1466 (bfd *, asection *);
1467 extern bfd_byte _bfd_elf_encode_eh_address
1468 (bfd *abfd, struct bfd_link_info *info, asection *osec, bfd_vma offset,
1469 asection *loc_sec, bfd_vma loc_offset, bfd_vma *encoded);
1470 extern bfd_boolean _bfd_elf_can_make_relative
1471 (bfd *input_bfd, struct bfd_link_info *info, asection *eh_frame_section);
1473 extern enum elf_reloc_type_class _bfd_elf_reloc_type_class
1474 (const Elf_Internal_Rela *);
1475 extern bfd_vma _bfd_elf_rela_local_sym
1476 (bfd *, Elf_Internal_Sym *, asection **, Elf_Internal_Rela *);
1477 extern bfd_vma _bfd_elf_rel_local_sym
1478 (bfd *, Elf_Internal_Sym *, asection **, bfd_vma);
1479 extern bfd_vma _bfd_elf_section_offset
1480 (bfd *, struct bfd_link_info *, asection *, bfd_vma);
1482 extern unsigned long bfd_elf_hash
1485 extern bfd_reloc_status_type bfd_elf_generic_reloc
1486 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
1487 extern bfd_boolean bfd_elf_mkobject
1489 extern bfd_boolean bfd_elf_mkcorefile
1491 extern Elf_Internal_Shdr *bfd_elf_find_section
1493 extern bfd_boolean _bfd_elf_make_section_from_shdr
1494 (bfd *, Elf_Internal_Shdr *, const char *, int);
1495 extern bfd_boolean _bfd_elf_make_section_from_phdr
1496 (bfd *, Elf_Internal_Phdr *, int, const char *);
1497 extern struct bfd_hash_entry *_bfd_elf_link_hash_newfunc
1498 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
1499 extern struct bfd_link_hash_table *_bfd_elf_link_hash_table_create
1501 extern void _bfd_elf_link_hash_copy_indirect
1502 (struct bfd_link_info *, struct elf_link_hash_entry *,
1503 struct elf_link_hash_entry *);
1504 extern void _bfd_elf_link_hash_hide_symbol
1505 (struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean);
1506 extern bfd_boolean _bfd_elf_link_hash_fixup_symbol
1507 (struct bfd_link_info *, struct elf_link_hash_entry *);
1508 extern bfd_boolean _bfd_elf_link_hash_table_init
1509 (struct elf_link_hash_table *, bfd *,
1510 struct bfd_hash_entry *(*)
1511 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *),
1513 extern bfd_boolean _bfd_elf_slurp_version_tables
1514 (bfd *, bfd_boolean);
1515 extern bfd_boolean _bfd_elf_merge_sections
1516 (bfd *, struct bfd_link_info *);
1517 extern bfd_boolean _bfd_elf_match_sections_by_type
1518 (bfd *, const asection *, bfd *, const asection *);
1519 extern bfd_boolean bfd_elf_is_group_section
1520 (bfd *, const struct bfd_section *);
1521 extern void _bfd_elf_section_already_linked
1522 (bfd *, struct bfd_section *);
1523 extern void bfd_elf_set_group_contents
1524 (bfd *, asection *, void *);
1525 extern asection *_bfd_elf_check_kept_section
1527 extern void _bfd_elf_link_just_syms
1528 (asection *, struct bfd_link_info *);
1529 extern bfd_boolean _bfd_elf_copy_private_header_data
1531 extern bfd_boolean _bfd_elf_copy_private_symbol_data
1532 (bfd *, asymbol *, bfd *, asymbol *);
1533 #define _bfd_generic_init_private_section_data \
1534 _bfd_elf_init_private_section_data
1535 extern bfd_boolean _bfd_elf_init_private_section_data
1536 (bfd *, asection *, bfd *, asection *, struct bfd_link_info *);
1537 extern bfd_boolean _bfd_elf_copy_private_section_data
1538 (bfd *, asection *, bfd *, asection *);
1539 extern bfd_boolean _bfd_elf_write_object_contents
1541 extern bfd_boolean _bfd_elf_write_corefile_contents
1543 extern bfd_boolean _bfd_elf_set_section_contents
1544 (bfd *, sec_ptr, const void *, file_ptr, bfd_size_type);
1545 extern long _bfd_elf_get_symtab_upper_bound
1547 extern long _bfd_elf_canonicalize_symtab
1548 (bfd *, asymbol **);
1549 extern long _bfd_elf_get_dynamic_symtab_upper_bound
1551 extern long _bfd_elf_canonicalize_dynamic_symtab
1552 (bfd *, asymbol **);
1553 extern long _bfd_elf_get_synthetic_symtab
1554 (bfd *, long, asymbol **, long, asymbol **, asymbol **);
1555 extern long _bfd_elf_get_reloc_upper_bound
1557 extern long _bfd_elf_canonicalize_reloc
1558 (bfd *, sec_ptr, arelent **, asymbol **);
1559 extern long _bfd_elf_get_dynamic_reloc_upper_bound
1561 extern long _bfd_elf_canonicalize_dynamic_reloc
1562 (bfd *, arelent **, asymbol **);
1563 extern asymbol *_bfd_elf_make_empty_symbol
1565 extern void _bfd_elf_get_symbol_info
1566 (bfd *, asymbol *, symbol_info *);
1567 extern bfd_boolean _bfd_elf_is_local_label_name
1568 (bfd *, const char *);
1569 extern alent *_bfd_elf_get_lineno
1571 extern bfd_boolean _bfd_elf_set_arch_mach
1572 (bfd *, enum bfd_architecture, unsigned long);
1573 extern bfd_boolean _bfd_elf_find_nearest_line
1574 (bfd *, asection *, asymbol **, bfd_vma, const char **, const char **,
1576 extern bfd_boolean _bfd_elf_find_line
1577 (bfd *, asymbol **, asymbol *, const char **, unsigned int *);
1578 #define _bfd_generic_find_line _bfd_elf_find_line
1579 extern bfd_boolean _bfd_elf_find_inliner_info
1580 (bfd *, const char **, const char **, unsigned int *);
1581 #define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols
1582 #define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
1583 extern int _bfd_elf_sizeof_headers
1584 (bfd *, struct bfd_link_info *);
1585 extern bfd_boolean _bfd_elf_new_section_hook
1586 (bfd *, asection *);
1587 extern bfd_boolean _bfd_elf_init_reloc_shdr
1588 (bfd *, Elf_Internal_Shdr *, asection *, bfd_boolean);
1589 extern const struct bfd_elf_special_section *_bfd_elf_get_special_section
1590 (const char *, const struct bfd_elf_special_section *, unsigned int);
1591 extern const struct bfd_elf_special_section *_bfd_elf_get_sec_type_attr
1592 (bfd *, asection *);
1594 /* If the target doesn't have reloc handling written yet: */
1595 extern void _bfd_elf_no_info_to_howto
1596 (bfd *, arelent *, Elf_Internal_Rela *);
1598 extern bfd_boolean bfd_section_from_shdr
1599 (bfd *, unsigned int shindex);
1600 extern bfd_boolean bfd_section_from_phdr
1601 (bfd *, Elf_Internal_Phdr *, int);
1603 extern int _bfd_elf_symbol_from_bfd_symbol
1604 (bfd *, asymbol **);
1606 extern asection *bfd_section_from_r_symndx
1607 (bfd *, struct sym_sec_cache *, asection *, unsigned long);
1608 extern asection *bfd_section_from_elf_index
1609 (bfd *, unsigned int);
1610 extern struct bfd_strtab_hash *_bfd_elf_stringtab_init
1613 extern struct elf_strtab_hash * _bfd_elf_strtab_init
1615 extern void _bfd_elf_strtab_free
1616 (struct elf_strtab_hash *);
1617 extern bfd_size_type _bfd_elf_strtab_add
1618 (struct elf_strtab_hash *, const char *, bfd_boolean);
1619 extern void _bfd_elf_strtab_addref
1620 (struct elf_strtab_hash *, bfd_size_type);
1621 extern void _bfd_elf_strtab_delref
1622 (struct elf_strtab_hash *, bfd_size_type);
1623 extern void _bfd_elf_strtab_clear_all_refs
1624 (struct elf_strtab_hash *);
1625 extern bfd_size_type _bfd_elf_strtab_size
1626 (struct elf_strtab_hash *);
1627 extern bfd_size_type _bfd_elf_strtab_offset
1628 (struct elf_strtab_hash *, bfd_size_type);
1629 extern bfd_boolean _bfd_elf_strtab_emit
1630 (bfd *, struct elf_strtab_hash *);
1631 extern void _bfd_elf_strtab_finalize
1632 (struct elf_strtab_hash *);
1634 extern bfd_boolean _bfd_elf_discard_section_eh_frame
1635 (bfd *, struct bfd_link_info *, asection *,
1636 bfd_boolean (*) (bfd_vma, void *), struct elf_reloc_cookie *);
1637 extern bfd_boolean _bfd_elf_discard_section_eh_frame_hdr
1638 (bfd *, struct bfd_link_info *);
1639 extern bfd_vma _bfd_elf_eh_frame_section_offset
1640 (bfd *, struct bfd_link_info *, asection *, bfd_vma);
1641 extern bfd_boolean _bfd_elf_write_section_eh_frame
1642 (bfd *, struct bfd_link_info *, asection *, bfd_byte *);
1643 extern bfd_boolean _bfd_elf_write_section_eh_frame_hdr
1644 (bfd *, struct bfd_link_info *);
1645 extern bfd_boolean _bfd_elf_maybe_strip_eh_frame_hdr
1646 (struct bfd_link_info *);
1648 extern bfd_boolean _bfd_elf_merge_symbol
1649 (bfd *, struct bfd_link_info *, const char *, Elf_Internal_Sym *,
1650 asection **, bfd_vma *, unsigned int *,
1651 struct elf_link_hash_entry **, bfd_boolean *,
1652 bfd_boolean *, bfd_boolean *, bfd_boolean *);
1654 extern bfd_boolean _bfd_elf_add_default_symbol
1655 (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
1656 const char *, Elf_Internal_Sym *, asection **, bfd_vma *,
1657 bfd_boolean *, bfd_boolean);
1659 extern bfd_boolean _bfd_elf_export_symbol
1660 (struct elf_link_hash_entry *, void *);
1662 extern bfd_boolean _bfd_elf_link_find_version_dependencies
1663 (struct elf_link_hash_entry *, void *);
1665 extern bfd_boolean _bfd_elf_link_assign_sym_version
1666 (struct elf_link_hash_entry *, void *);
1668 extern long _bfd_elf_link_lookup_local_dynindx
1669 (struct bfd_link_info *, bfd *, long);
1670 extern bfd_boolean _bfd_elf_compute_section_file_positions
1671 (bfd *, struct bfd_link_info *);
1672 extern void _bfd_elf_assign_file_positions_for_relocs
1674 extern file_ptr _bfd_elf_assign_file_position_for_section
1675 (Elf_Internal_Shdr *, file_ptr, bfd_boolean);
1677 extern bfd_boolean _bfd_elf_validate_reloc
1680 extern bfd_boolean _bfd_elf_link_create_dynamic_sections
1681 (bfd *, struct bfd_link_info *);
1682 extern bfd_boolean _bfd_elf_link_omit_section_dynsym
1683 (bfd *, struct bfd_link_info *, asection *);
1684 extern bfd_boolean _bfd_elf_create_dynamic_sections
1685 (bfd *, struct bfd_link_info *);
1686 extern bfd_boolean _bfd_elf_create_got_section
1687 (bfd *, struct bfd_link_info *);
1688 extern struct elf_link_hash_entry *_bfd_elf_define_linkage_sym
1689 (bfd *, struct bfd_link_info *, asection *, const char *);
1691 extern bfd_boolean _bfd_elfcore_make_pseudosection
1692 (bfd *, char *, size_t, ufile_ptr);
1693 extern char *_bfd_elfcore_strndup
1694 (bfd *, char *, size_t);
1696 extern Elf_Internal_Rela *_bfd_elf_link_read_relocs
1697 (bfd *, asection *, void *, Elf_Internal_Rela *, bfd_boolean);
1699 extern bfd_boolean _bfd_elf_link_size_reloc_section
1700 (bfd *, Elf_Internal_Shdr *, asection *);
1702 extern bfd_boolean _bfd_elf_link_output_relocs
1703 (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *,
1704 struct elf_link_hash_entry **);
1706 extern bfd_boolean _bfd_elf_fix_symbol_flags
1707 (struct elf_link_hash_entry *, struct elf_info_failed *);
1709 extern bfd_boolean _bfd_elf_adjust_dynamic_symbol
1710 (struct elf_link_hash_entry *, void *);
1712 extern bfd_boolean _bfd_elf_link_sec_merge_syms
1713 (struct elf_link_hash_entry *, void *);
1715 extern bfd_boolean _bfd_elf_dynamic_symbol_p
1716 (struct elf_link_hash_entry *, struct bfd_link_info *, bfd_boolean);
1718 extern bfd_boolean _bfd_elf_symbol_refs_local_p
1719 (struct elf_link_hash_entry *, struct bfd_link_info *, bfd_boolean);
1721 extern bfd_boolean bfd_elf_match_symbols_in_sections
1722 (asection *sec1, asection *sec2);
1724 extern bfd_boolean _bfd_elf_setup_sections
1727 extern const bfd_target *bfd_elf32_object_p
1729 extern const bfd_target *bfd_elf32_core_file_p
1731 extern char *bfd_elf32_core_file_failing_command
1733 extern int bfd_elf32_core_file_failing_signal
1735 extern bfd_boolean bfd_elf32_core_file_matches_executable_p
1738 extern void bfd_elf32_swap_symbol_in
1739 (bfd *, const void *, const void *, Elf_Internal_Sym *);
1740 extern void bfd_elf32_swap_symbol_out
1741 (bfd *, const Elf_Internal_Sym *, void *, void *);
1742 extern void bfd_elf32_swap_reloc_in
1743 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
1744 extern void bfd_elf32_swap_reloc_out
1745 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
1746 extern void bfd_elf32_swap_reloca_in
1747 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
1748 extern void bfd_elf32_swap_reloca_out
1749 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
1750 extern void bfd_elf32_swap_phdr_in
1751 (bfd *, const Elf32_External_Phdr *, Elf_Internal_Phdr *);
1752 extern void bfd_elf32_swap_phdr_out
1753 (bfd *, const Elf_Internal_Phdr *, Elf32_External_Phdr *);
1754 extern void bfd_elf32_swap_dyn_in
1755 (bfd *, const void *, Elf_Internal_Dyn *);
1756 extern void bfd_elf32_swap_dyn_out
1757 (bfd *, const Elf_Internal_Dyn *, void *);
1758 extern long bfd_elf32_slurp_symbol_table
1759 (bfd *, asymbol **, bfd_boolean);
1760 extern bfd_boolean bfd_elf32_write_shdrs_and_ehdr
1762 extern int bfd_elf32_write_out_phdrs
1763 (bfd *, const Elf_Internal_Phdr *, unsigned int);
1764 extern void bfd_elf32_write_relocs
1765 (bfd *, asection *, void *);
1766 extern bfd_boolean bfd_elf32_slurp_reloc_table
1767 (bfd *, asection *, asymbol **, bfd_boolean);
1769 extern const bfd_target *bfd_elf64_object_p
1771 extern const bfd_target *bfd_elf64_core_file_p
1773 extern char *bfd_elf64_core_file_failing_command
1775 extern int bfd_elf64_core_file_failing_signal
1777 extern bfd_boolean bfd_elf64_core_file_matches_executable_p
1780 extern void bfd_elf64_swap_symbol_in
1781 (bfd *, const void *, const void *, Elf_Internal_Sym *);
1782 extern void bfd_elf64_swap_symbol_out
1783 (bfd *, const Elf_Internal_Sym *, void *, void *);
1784 extern void bfd_elf64_swap_reloc_in
1785 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
1786 extern void bfd_elf64_swap_reloc_out
1787 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
1788 extern void bfd_elf64_swap_reloca_in
1789 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
1790 extern void bfd_elf64_swap_reloca_out
1791 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
1792 extern void bfd_elf64_swap_phdr_in
1793 (bfd *, const Elf64_External_Phdr *, Elf_Internal_Phdr *);
1794 extern void bfd_elf64_swap_phdr_out
1795 (bfd *, const Elf_Internal_Phdr *, Elf64_External_Phdr *);
1796 extern void bfd_elf64_swap_dyn_in
1797 (bfd *, const void *, Elf_Internal_Dyn *);
1798 extern void bfd_elf64_swap_dyn_out
1799 (bfd *, const Elf_Internal_Dyn *, void *);
1800 extern long bfd_elf64_slurp_symbol_table
1801 (bfd *, asymbol **, bfd_boolean);
1802 extern bfd_boolean bfd_elf64_write_shdrs_and_ehdr
1804 extern int bfd_elf64_write_out_phdrs
1805 (bfd *, const Elf_Internal_Phdr *, unsigned int);
1806 extern void bfd_elf64_write_relocs
1807 (bfd *, asection *, void *);
1808 extern bfd_boolean bfd_elf64_slurp_reloc_table
1809 (bfd *, asection *, asymbol **, bfd_boolean);
1811 extern struct elf_link_hash_entry *_bfd_elf_archive_symbol_lookup
1812 (bfd *, struct bfd_link_info *, const char *);
1813 extern bfd_boolean bfd_elf_link_add_symbols
1814 (bfd *, struct bfd_link_info *);
1815 extern bfd_boolean _bfd_elf_add_dynamic_entry
1816 (struct bfd_link_info *, bfd_vma, bfd_vma);
1818 extern bfd_boolean bfd_elf_link_record_dynamic_symbol
1819 (struct bfd_link_info *, struct elf_link_hash_entry *);
1821 extern int bfd_elf_link_record_local_dynamic_symbol
1822 (struct bfd_link_info *, bfd *, long);
1824 extern bfd_boolean _bfd_elf_close_and_cleanup
1827 extern bfd_boolean _bfd_elf_common_definition
1828 (Elf_Internal_Sym *);
1830 extern unsigned int _bfd_elf_common_section_index
1833 extern asection *_bfd_elf_common_section
1836 extern void _bfd_dwarf2_cleanup_debug_info
1839 extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn
1840 (bfd *, arelent *, struct bfd_symbol *, void *,
1841 asection *, bfd *, char **);
1843 extern bfd_boolean bfd_elf_final_link
1844 (bfd *, struct bfd_link_info *);
1846 extern bfd_boolean bfd_elf_gc_mark_dynamic_ref_symbol
1847 (struct elf_link_hash_entry *h, void *inf);
1849 extern bfd_boolean bfd_elf_gc_sections
1850 (bfd *, struct bfd_link_info *);
1852 extern bfd_boolean bfd_elf_gc_record_vtinherit
1853 (bfd *, asection *, struct elf_link_hash_entry *, bfd_vma);
1855 extern bfd_boolean bfd_elf_gc_record_vtentry
1856 (bfd *, asection *, struct elf_link_hash_entry *, bfd_vma);
1858 extern bfd_boolean _bfd_elf_gc_mark
1859 (struct bfd_link_info *, asection *,
1860 asection * (*) (asection *, struct bfd_link_info *, Elf_Internal_Rela *,
1861 struct elf_link_hash_entry *, Elf_Internal_Sym *));
1863 extern bfd_boolean bfd_elf_gc_common_finalize_got_offsets
1864 (bfd *, struct bfd_link_info *);
1866 extern bfd_boolean bfd_elf_gc_common_final_link
1867 (bfd *, struct bfd_link_info *);
1869 extern bfd_boolean bfd_elf_reloc_symbol_deleted_p
1872 extern struct elf_segment_map * _bfd_elf_make_dynamic_segment
1873 (bfd *, asection *);
1875 extern bfd_boolean _bfd_elf_map_sections_to_segments
1876 (bfd *, struct bfd_link_info *);
1878 /* Exported interface for writing elf corefile notes. */
1879 extern char *elfcore_write_note
1880 (bfd *, char *, int *, const char *, int, const void *, int);
1881 extern char *elfcore_write_prpsinfo
1882 (bfd *, char *, int *, const char *, const char *);
1883 extern char *elfcore_write_prstatus
1884 (bfd *, char *, int *, long, int, const void *);
1885 extern char * elfcore_write_pstatus
1886 (bfd *, char *, int *, long, int, const void *);
1887 extern char *elfcore_write_prfpreg
1888 (bfd *, char *, int *, const void *, int);
1889 extern char *elfcore_write_prxfpreg
1890 (bfd *, char *, int *, const void *, int);
1891 extern char *elfcore_write_lwpstatus
1892 (bfd *, char *, int *, long, int, const void *);
1894 extern bfd *_bfd_elf32_bfd_from_remote_memory
1895 (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep,
1896 int (*target_read_memory) (bfd_vma, bfd_byte *, int));
1897 extern bfd *_bfd_elf64_bfd_from_remote_memory
1898 (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep,
1899 int (*target_read_memory) (bfd_vma, bfd_byte *, int));
1901 /* Large common section. */
1902 extern asection _bfd_elf_large_com_section;
1904 /* SH ELF specific routine. */
1906 extern bfd_boolean _sh_elf_set_mach_from_flags
1909 /* This is the condition under which finish_dynamic_symbol will be called.
1910 If our finish_dynamic_symbol isn't called, we'll need to do something
1911 about initializing any .plt and .got entries in relocate_section. */
1912 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
1914 && ((SHARED) || !(H)->forced_local) \
1915 && ((H)->dynindx != -1 || (H)->forced_local))
1917 /* This macro is to avoid lots of duplicated code in the body
1918 of xxx_relocate_section() in the various elfxx-xxxx.c files. */
1919 #define RELOC_FOR_GLOBAL_SYMBOL(info, input_bfd, input_section, rel, \
1920 r_symndx, symtab_hdr, sym_hashes, \
1921 h, sec, relocation, \
1922 unresolved_reloc, warned) \
1925 /* It seems this can happen with erroneous or unsupported \
1926 input (mixing a.out and elf in an archive, for example.) */ \
1927 if (sym_hashes == NULL) \
1930 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; \
1932 while (h->root.type == bfd_link_hash_indirect \
1933 || h->root.type == bfd_link_hash_warning) \
1934 h = (struct elf_link_hash_entry *) h->root.u.i.link; \
1937 unresolved_reloc = FALSE; \
1939 if (h->root.type == bfd_link_hash_defined \
1940 || h->root.type == bfd_link_hash_defweak) \
1942 sec = h->root.u.def.section; \
1944 || sec->output_section == NULL) \
1945 /* Set a flag that will be cleared later if we find a \
1946 relocation value for this symbol. output_section \
1947 is typically NULL for symbols satisfied by a shared \
1949 unresolved_reloc = TRUE; \
1951 relocation = (h->root.u.def.value \
1952 + sec->output_section->vma \
1953 + sec->output_offset); \
1955 else if (h->root.type == bfd_link_hash_undefweak) \
1957 else if (info->unresolved_syms_in_objects == RM_IGNORE \
1958 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) \
1963 err = (info->unresolved_syms_in_objects == RM_GENERATE_ERROR \
1964 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT); \
1965 if (!info->callbacks->undefined_symbol (info, \
1966 h->root.root.string, \
1969 rel->r_offset, err)) \
1976 #endif /* _LIBELF_H_ */