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, 2007, 2008, 2009, 2010, 2011
4 Free Software Foundation, Inc.
5 Written by Cygnus Support.
7 This file is part of BFD, the Binary File Descriptor library.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 MA 02110-1301, USA. */
27 #include "elf/common.h"
28 #include "elf/external.h"
29 #include "elf/internal.h"
32 /* The number of entries in a section is its size divided by the size
33 of a single entry. This is normally only applicable to reloc and
34 symbol table sections.
35 PR 9934: It is possible to have relocations that do not refer to
36 symbols, thus it is also possible to have a relocation section in
37 an object file, but no symbol table. */
38 #define NUM_SHDR_ENTRIES(shdr) ((shdr)->sh_entsize > 0 ? (shdr)->sh_size / (shdr)->sh_entsize : 0)
40 /* If size isn't specified as 64 or 32, NAME macro should fail. */
43 #define NAME(x, y) x ## 64 ## _ ## y
46 #define NAME(x, y) x ## 32 ## _ ## y
51 #define NAME(x, y) x ## NOSIZE ## _ ## y
54 #define ElfNAME(X) NAME(Elf,X)
55 #define elfNAME(X) NAME(elf,X)
57 /* Information held for an ELF symbol. The first field is the
58 corresponding asymbol. Every symbol is an ELF file is actually a
59 pointer to this structure, although it is often handled as a
60 pointer to an asymbol. */
66 /* ELF symbol information. */
67 Elf_Internal_Sym internal_elf_sym;
68 /* Backend specific information. */
71 unsigned int hppa_arg_reloc;
77 /* Version information. This is from an Elf_Internal_Versym
78 structure in a SHT_GNU_versym section. It is zero if there is no
79 version information. */
80 unsigned short version;
84 struct elf_strtab_hash;
90 bfd_signed_vma refcount;
92 struct got_entry *glist;
93 struct plt_entry *plist;
96 struct elf_link_virtual_table_entry
98 /* Virtual table entry use information. This array is nominally of size
99 size/sizeof(target_void_pointer), though we have to be able to assume
100 and track a size while the symbol is still undefined. It is indexed
101 via offset/sizeof(target_void_pointer). */
105 /* Virtual table derivation info. */
106 struct elf_link_hash_entry *parent;
109 /* ELF linker hash table entries. */
111 struct elf_link_hash_entry
113 struct bfd_link_hash_entry root;
115 /* Symbol index in output file. This is initialized to -1. It is
116 set to -2 if the symbol is used by a reloc. */
119 /* Symbol index as a dynamic symbol. Initialized to -1, and remains
120 -1 if this is not a dynamic symbol. */
121 /* ??? Note that this is consistently used as a synonym for tests
122 against whether we can perform various simplifying transformations
123 to the code. (E.g. changing a pc-relative jump to a PLT entry
124 into a pc-relative jump to the target function.) That test, which
125 is often relatively complex, and someplaces wrong or incomplete,
126 should really be replaced by a predicate in elflink.c.
128 End result: this field -1 does not indicate that the symbol is
129 not in the dynamic symbol table, but rather that the symbol is
130 not visible outside this DSO. */
133 /* If this symbol requires an entry in the global offset table, the
134 processor specific backend uses this field to track usage and
135 final offset. Two schemes are supported: The first assumes that
136 a symbol may only have one GOT entry, and uses REFCOUNT until
137 size_dynamic_sections, at which point the contents of the .got is
138 fixed. Afterward, if OFFSET is -1, then the symbol does not
139 require a global offset table entry. The second scheme allows
140 multiple GOT entries per symbol, managed via a linked list
141 pointed to by GLIST. */
142 union gotplt_union got;
144 /* Same, but tracks a procedure linkage table entry. */
145 union gotplt_union plt;
150 /* Symbol type (STT_NOTYPE, STT_OBJECT, etc.). */
151 unsigned int type : 8;
153 /* Symbol st_other value, symbol visibility. */
154 unsigned int other : 8;
156 /* The symbol's st_target_internal value (see Elf_Internal_Sym). */
157 unsigned int target_internal : 8;
159 /* Symbol is referenced by a non-shared object (other than the object
160 in which it is defined). */
161 unsigned int ref_regular : 1;
162 /* Symbol is defined by a non-shared object. */
163 unsigned int def_regular : 1;
164 /* Symbol is referenced by a shared object. */
165 unsigned int ref_dynamic : 1;
166 /* Symbol is defined by a shared object. */
167 unsigned int def_dynamic : 1;
168 /* Symbol has a non-weak reference from a non-shared object (other than
169 the object in which it is defined). */
170 unsigned int ref_regular_nonweak : 1;
171 /* Dynamic symbol has been adjustd. */
172 unsigned int dynamic_adjusted : 1;
173 /* Symbol needs a copy reloc. */
174 unsigned int needs_copy : 1;
175 /* Symbol needs a procedure linkage table entry. */
176 unsigned int needs_plt : 1;
177 /* Symbol appears in a non-ELF input file. */
178 unsigned int non_elf : 1;
179 /* Symbol should be marked as hidden in the version information. */
180 unsigned int hidden : 1;
181 /* Symbol was forced to local scope due to a version script file. */
182 unsigned int forced_local : 1;
183 /* Symbol was forced to be dynamic due to a version script file. */
184 unsigned int dynamic : 1;
185 /* Symbol was marked during garbage collection. */
186 unsigned int mark : 1;
187 /* Symbol is referenced by a non-GOT/non-PLT relocation. This is
188 not currently set by all the backends. */
189 unsigned int non_got_ref : 1;
190 /* Symbol has a definition in a shared object.
191 FIXME: There is no real need for this field if def_dynamic is never
192 cleared and all places that test def_dynamic also test def_regular. */
193 unsigned int dynamic_def : 1;
194 /* Symbol is weak in all shared objects. */
195 unsigned int dynamic_weak : 1;
196 /* Symbol is referenced with a relocation where C/C++ pointer equality
198 unsigned int pointer_equality_needed : 1;
199 /* Symbol is a unique global symbol. */
200 unsigned int unique_global : 1;
202 /* String table index in .dynstr if this is a dynamic symbol. */
203 unsigned long dynstr_index;
207 /* If this is a weak defined symbol from a dynamic object, this
208 field points to a defined symbol with the same value, if there is
209 one. Otherwise it is NULL. */
210 struct elf_link_hash_entry *weakdef;
212 /* Hash value of the name computed using the ELF hash function.
213 Used part way through size_dynamic_sections, after we've finished
215 unsigned long elf_hash_value;
218 /* Version information. */
221 /* This field is used for a symbol which is not defined in a
222 regular object. It points to the version information read in
223 from the dynamic object. */
224 Elf_Internal_Verdef *verdef;
225 /* This field is used for a symbol which is defined in a regular
226 object. It is set up in size_dynamic_sections. It points to
227 the version information we should write out for this symbol. */
228 struct bfd_elf_version_tree *vertree;
231 struct elf_link_virtual_table_entry *vtable;
234 /* Will references to this symbol always reference the symbol
236 #define SYMBOL_REFERENCES_LOCAL(INFO, H) \
237 _bfd_elf_symbol_refs_local_p (H, INFO, 0)
239 /* Will _calls_ to this symbol always call the version in this object? */
240 #define SYMBOL_CALLS_LOCAL(INFO, H) \
241 _bfd_elf_symbol_refs_local_p (H, INFO, 1)
243 /* Common symbols that are turned into definitions don't have the
244 DEF_REGULAR flag set, so they might appear to be undefined. */
245 #define ELF_COMMON_DEF_P(H) \
247 && !(H)->def_dynamic \
248 && (H)->root.type == bfd_link_hash_defined)
250 /* Records local symbols to be emitted in the dynamic symbol table. */
252 struct elf_link_local_dynamic_entry
254 struct elf_link_local_dynamic_entry *next;
256 /* The input bfd this symbol came from. */
259 /* The index of the local symbol being copied. */
262 /* The index in the outgoing dynamic symbol table. */
265 /* A copy of the input symbol. */
266 Elf_Internal_Sym isym;
269 struct elf_link_loaded_list
271 struct elf_link_loaded_list *next;
275 /* Structures used by the eh_frame optimization code. */
280 /* If REMOVED == 1, this is the CIE that the FDE originally used.
281 The CIE belongs to the same .eh_frame input section as the FDE.
283 If REMOVED == 0, this is the CIE that we have chosen to use for
284 the output FDE. The CIE's REMOVED field is also 0, but the CIE
285 might belong to a different .eh_frame input section from the FDE. */
286 struct eh_cie_fde *cie_inf;
287 struct eh_cie_fde *next_for_section;
290 /* CIEs have three states:
292 - REMOVED && !MERGED: Slated for removal because we haven't yet
293 proven that an FDE needs it. FULL_CIE, if nonnull, points to
294 more detailed information about the CIE.
296 - REMOVED && MERGED: We have merged this CIE with MERGED_WITH,
297 which may not belong to the same input section.
299 - !REMOVED: We have decided to keep this CIE. SEC is the
300 .eh_frame input section that contains the CIE. */
302 struct cie *full_cie;
303 struct eh_cie_fde *merged_with;
307 /* The offset of the personality data from the start of the CIE,
308 or 0 if the CIE doesn't have any. */
309 unsigned int personality_offset : 8;
311 /* True if we have marked relocations associated with this CIE. */
312 unsigned int gc_mark : 1;
314 /* True if we have decided to turn an absolute LSDA encoding into
315 a PC-relative one. */
316 unsigned int make_lsda_relative : 1;
318 /* True if we have decided to turn an absolute personality
319 encoding into a PC-relative one. */
320 unsigned int make_per_encoding_relative : 1;
322 /* True if the CIE contains personality data and if that
323 data uses a PC-relative encoding. Always true when
324 make_per_encoding_relative is. */
325 unsigned int per_encoding_relative : 1;
327 /* True if we need to add an 'R' (FDE encoding) entry to the
328 CIE's augmentation data. */
329 unsigned int add_fde_encoding : 1;
331 /* True if we have merged this CIE with another. */
332 unsigned int merged : 1;
335 unsigned int pad1 : 18;
338 unsigned int reloc_index;
341 unsigned int new_offset;
342 unsigned int fde_encoding : 8;
343 unsigned int lsda_encoding : 8;
344 unsigned int lsda_offset : 8;
346 /* True if this entry represents a CIE, false if it represents an FDE. */
347 unsigned int cie : 1;
349 /* True if this entry is currently marked for removal. */
350 unsigned int removed : 1;
352 /* True if we need to add a 'z' (augmentation size) entry to the CIE's
353 augmentation data, and an associated byte to each of the CIE's FDEs. */
354 unsigned int add_augmentation_size : 1;
356 /* True if we have decided to convert absolute FDE relocations into
357 relative ones. This applies to the first relocation in the FDE,
358 which is against the code that the FDE describes. */
359 unsigned int make_relative : 1;
362 unsigned int pad1 : 4;
364 unsigned int *set_loc;
367 struct eh_frame_sec_info
371 struct eh_cie_fde entry[1];
374 struct eh_frame_array_ent
382 struct eh_frame_hdr_info
386 unsigned int fde_count, array_count;
387 struct eh_frame_array_ent *array;
388 /* TRUE if we should try to merge CIEs between input sections. */
389 bfd_boolean merge_cies;
390 /* TRUE if all .eh_frames have been parsd. */
391 bfd_boolean parsed_eh_frames;
392 /* TRUE if .eh_frame_hdr should contain the sorted search table.
393 We build it if we successfully read all .eh_frame input sections
394 and recognize them. */
398 /* Enum used to identify target specific extensions to the elf_obj_tdata
399 and elf_link_hash_table structures. Note the enums deliberately start
400 from 1 so that we can detect an uninitialized field. The generic value
401 is last so that additions to this enum do not need to modify more than
436 /* ELF linker hash table. */
438 struct elf_link_hash_table
440 struct bfd_link_hash_table root;
442 /* An identifier used to distinguish different target
443 specific extensions to this structure. */
444 enum elf_target_id hash_table_id;
446 /* Whether we have created the special dynamic sections required
447 when linking against or generating a shared object. */
448 bfd_boolean dynamic_sections_created;
450 /* True if this target has relocatable executables, so needs dynamic
452 bfd_boolean is_relocatable_executable;
454 /* The BFD used to hold special sections created by the linker.
455 This will be the first BFD found which requires these sections to
459 /* The value to use when initialising got.refcount/offset and
460 plt.refcount/offset in an elf_link_hash_entry. Set to zero when
461 the values are refcounts. Set to init_got_offset/init_plt_offset
462 in size_dynamic_sections when the values may be offsets. */
463 union gotplt_union init_got_refcount;
464 union gotplt_union init_plt_refcount;
466 /* The value to use for got.refcount/offset and plt.refcount/offset
467 when the values may be offsets. Normally (bfd_vma) -1. */
468 union gotplt_union init_got_offset;
469 union gotplt_union init_plt_offset;
471 /* The number of symbols found in the link which must be put into
472 the .dynsym section. */
473 bfd_size_type dynsymcount;
475 /* The string table of dynamic symbols, which becomes the .dynstr
477 struct elf_strtab_hash *dynstr;
479 /* The number of buckets in the hash table in the .hash section.
480 This is based on the number of dynamic symbols. */
481 bfd_size_type bucketcount;
483 /* A linked list of DT_NEEDED names found in dynamic objects
484 included in the link. */
485 struct bfd_link_needed_list *needed;
487 /* Sections in the output bfd that provides a section symbol
488 to be used by relocations emitted against local symbols.
489 Most targets will not use data_index_section. */
490 asection *text_index_section;
491 asection *data_index_section;
493 /* The _GLOBAL_OFFSET_TABLE_ symbol. */
494 struct elf_link_hash_entry *hgot;
496 /* The _PROCEDURE_LINKAGE_TABLE_ symbol. */
497 struct elf_link_hash_entry *hplt;
499 /* A pointer to information used to merge SEC_MERGE sections. */
502 /* Used to link stabs in sections. */
503 struct stab_info stab_info;
505 /* Used by eh_frame code when editing .eh_frame. */
506 struct eh_frame_hdr_info eh_info;
508 /* A linked list of local symbols to be added to .dynsym. */
509 struct elf_link_local_dynamic_entry *dynlocal;
511 /* A linked list of DT_RPATH/DT_RUNPATH names found in dynamic
512 objects included in the link. */
513 struct bfd_link_needed_list *runpath;
515 /* Cached first output tls section and size of PT_TLS segment. */
517 bfd_size_type tls_size;
519 /* A linked list of BFD's loaded in the link. */
520 struct elf_link_loaded_list *loaded;
522 /* Short-cuts to get to dynamic linker sections. */
534 /* Look up an entry in an ELF linker hash table. */
536 #define elf_link_hash_lookup(table, string, create, copy, follow) \
537 ((struct elf_link_hash_entry *) \
538 bfd_link_hash_lookup (&(table)->root, (string), (create), \
541 /* Traverse an ELF linker hash table. */
543 #define elf_link_hash_traverse(table, func, info) \
544 (bfd_link_hash_traverse \
546 (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func), \
549 /* Get the ELF linker hash table from a link_info structure. */
551 #define elf_hash_table(p) ((struct elf_link_hash_table *) ((p)->hash))
553 #define elf_hash_table_id(table) ((table) -> hash_table_id)
555 /* Returns TRUE if the hash table is a struct elf_link_hash_table. */
556 #define is_elf_hash_table(htab) \
557 (((struct bfd_link_hash_table *) (htab))->type == bfd_link_elf_hash_table)
559 /* Used by bfd_sym_from_r_symndx to cache a small number of local
561 #define LOCAL_SYM_CACHE_SIZE 32
565 unsigned long indx[LOCAL_SYM_CACHE_SIZE];
566 Elf_Internal_Sym sym[LOCAL_SYM_CACHE_SIZE];
569 /* Constant information held for an ELF backend. */
571 struct elf_size_info {
572 unsigned char sizeof_ehdr, sizeof_phdr, sizeof_shdr;
573 unsigned char sizeof_rel, sizeof_rela, sizeof_sym, sizeof_dyn, sizeof_note;
575 /* The size of entries in the .hash section. */
576 unsigned char sizeof_hash_entry;
578 /* The number of internal relocations to allocate per external
580 unsigned char int_rels_per_ext_rel;
581 /* We use some fixed size arrays. This should be large enough to
582 handle all back-ends. */
583 #define MAX_INT_RELS_PER_EXT_REL 3
585 unsigned char arch_size, log_file_align;
586 unsigned char elfclass, ev_current;
587 int (*write_out_phdrs)
588 (bfd *, const Elf_Internal_Phdr *, unsigned int);
590 (*write_shdrs_and_ehdr) (bfd *);
591 bfd_boolean (*checksum_contents)
592 (bfd * , void (*) (const void *, size_t, void *), void *);
594 (bfd *, asection *, void *);
595 bfd_boolean (*swap_symbol_in)
596 (bfd *, const void *, const void *, Elf_Internal_Sym *);
597 void (*swap_symbol_out)
598 (bfd *, const Elf_Internal_Sym *, void *, void *);
599 bfd_boolean (*slurp_reloc_table)
600 (bfd *, asection *, asymbol **, bfd_boolean);
601 long (*slurp_symbol_table)
602 (bfd *, asymbol **, bfd_boolean);
604 (bfd *, const void *, Elf_Internal_Dyn *);
606 (bfd *, const Elf_Internal_Dyn *, void *);
608 /* This function is called to swap in a REL relocation. If an
609 external relocation corresponds to more than one internal
610 relocation, then all relocations are swapped in at once. */
611 void (*swap_reloc_in)
612 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
614 /* This function is called to swap out a REL relocation. */
615 void (*swap_reloc_out)
616 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
618 /* This function is called to swap in a RELA relocation. If an
619 external relocation corresponds to more than one internal
620 relocation, then all relocations are swapped in at once. */
621 void (*swap_reloca_in)
622 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
624 /* This function is called to swap out a RELA relocation. */
625 void (*swap_reloca_out)
626 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
629 #define elf_symbol_from(ABFD,S) \
630 (((S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \
631 && (S)->the_bfd->tdata.elf_obj_data != 0) \
632 ? (elf_symbol_type *) (S) \
635 enum elf_reloc_type_class {
637 reloc_class_relative,
642 struct elf_reloc_cookie
644 Elf_Internal_Rela *rels, *rel, *relend;
645 Elf_Internal_Sym *locsyms;
649 struct elf_link_hash_entry **sym_hashes;
651 bfd_boolean bad_symtab;
654 /* The level of IRIX compatibility we're striving for. */
662 /* Mapping of ELF section names and types. */
663 struct bfd_elf_special_section
667 /* 0 means name must match PREFIX exactly.
668 -1 means name must start with PREFIX followed by an arbitrary string.
669 -2 means name must match PREFIX exactly or consist of PREFIX followed
670 by a dot then anything.
671 > 0 means name must start with the first PREFIX_LENGTH chars of
672 PREFIX and finish with the last SUFFIX_LENGTH chars of PREFIX. */
678 enum action_discarded
684 typedef asection * (*elf_gc_mark_hook_fn)
685 (asection *, struct bfd_link_info *, Elf_Internal_Rela *,
686 struct elf_link_hash_entry *, Elf_Internal_Sym *);
688 struct elf_backend_data
690 /* The architecture for this backend. */
691 enum bfd_architecture arch;
693 /* An identifier used to distinguish different target specific
694 extensions to elf_obj_tdata and elf_link_hash_table structures. */
695 enum elf_target_id target_id;
697 /* The ELF machine code (EM_xxxx) for this backend. */
698 int elf_machine_code;
703 /* The maximum page size for this backend. */
706 /* The minimum page size for this backend. An input object will not be
707 considered page aligned unless its sections are correctly aligned for
708 pages at least this large. May be smaller than maxpagesize. */
711 /* The common page size for this backend. */
712 bfd_vma commonpagesize;
714 /* The BFD flags applied to sections created for dynamic linking. */
715 flagword dynamic_sec_flags;
717 /* A function to translate an ELF RELA relocation to a BFD arelent
719 void (*elf_info_to_howto)
720 (bfd *, arelent *, Elf_Internal_Rela *);
722 /* A function to translate an ELF REL relocation to a BFD arelent
724 void (*elf_info_to_howto_rel)
725 (bfd *, arelent *, Elf_Internal_Rela *);
727 /* A function to determine whether a symbol is global when
728 partitioning the symbol table into local and global symbols.
729 This should be NULL for most targets, in which case the correct
730 thing will be done. MIPS ELF, at least on the Irix 5, has
731 special requirements. */
732 bfd_boolean (*elf_backend_sym_is_global)
735 /* The remaining functions are hooks which are called only if they
738 /* A function to permit a backend specific check on whether a
739 particular BFD format is relevant for an object file, and to
740 permit the backend to set any global information it wishes. When
741 this is called elf_elfheader is set, but anything else should be
742 used with caution. If this returns FALSE, the check_format
743 routine will return a bfd_error_wrong_format error. */
744 bfd_boolean (*elf_backend_object_p)
747 /* A function to do additional symbol processing when reading the
748 ELF symbol table. This is where any processor-specific special
749 section indices are handled. */
750 void (*elf_backend_symbol_processing)
753 /* A function to do additional symbol processing after reading the
754 entire ELF symbol table. */
755 bfd_boolean (*elf_backend_symbol_table_processing)
756 (bfd *, elf_symbol_type *, unsigned int);
758 /* A function to set the type of the info field. Processor-specific
759 types should be handled here. */
760 int (*elf_backend_get_symbol_type)
761 (Elf_Internal_Sym *, int);
763 /* A function to return the linker hash table entry of a symbol that
764 might be satisfied by an archive symbol. */
765 struct elf_link_hash_entry * (*elf_backend_archive_symbol_lookup)
766 (bfd *, struct bfd_link_info *, const char *);
768 /* Return true if local section symbols should have a non-null st_name.
769 NULL implies false. */
770 bfd_boolean (*elf_backend_name_local_section_symbols)
773 /* A function to do additional processing on the ELF section header
774 just before writing it out. This is used to set the flags and
775 type fields for some sections, or to actually write out data for
777 bfd_boolean (*elf_backend_section_processing)
778 (bfd *, Elf_Internal_Shdr *);
780 /* A function to handle unusual section types when creating BFD
781 sections from ELF sections. */
782 bfd_boolean (*elf_backend_section_from_shdr)
783 (bfd *, Elf_Internal_Shdr *, const char *, int);
785 /* A function to convert machine dependent ELF section header flags to
786 BFD internal section header flags. */
787 bfd_boolean (*elf_backend_section_flags)
788 (flagword *, const Elf_Internal_Shdr *);
790 /* A function that returns a struct containing ELF section flags and
791 type for the given BFD section. */
792 const struct bfd_elf_special_section * (*get_sec_type_attr)
795 /* A function to handle unusual program segment types when creating BFD
796 sections from ELF program segments. */
797 bfd_boolean (*elf_backend_section_from_phdr)
798 (bfd *, Elf_Internal_Phdr *, int, const char *);
800 /* A function to set up the ELF section header for a BFD section in
801 preparation for writing it out. This is where the flags and type
802 fields are set for unusual sections. */
803 bfd_boolean (*elf_backend_fake_sections)
804 (bfd *, Elf_Internal_Shdr *, asection *);
806 /* A function to get the ELF section index for a BFD section. If
807 this returns TRUE, the section was found. If it is a normal ELF
808 section, *RETVAL should be left unchanged. If it is not a normal
809 ELF section *RETVAL should be set to the SHN_xxxx index. */
810 bfd_boolean (*elf_backend_section_from_bfd_section)
811 (bfd *, asection *, int *retval);
813 /* If this field is not NULL, it is called by the add_symbols phase
814 of a link just before adding a symbol to the global linker hash
815 table. It may modify any of the fields as it wishes. If *NAME
816 is set to NULL, the symbol will be skipped rather than being
817 added to the hash table. This function is responsible for
818 handling all processor dependent symbol bindings and section
819 indices, and must set at least *FLAGS and *SEC for each processor
820 dependent case; failure to do so will cause a link error. */
821 bfd_boolean (*elf_add_symbol_hook)
822 (bfd *abfd, struct bfd_link_info *info, Elf_Internal_Sym *,
823 const char **name, flagword *flags, asection **sec, bfd_vma *value);
825 /* If this field is not NULL, it is called by the elf_link_output_sym
826 phase of a link for each symbol which will appear in the object file.
827 On error, this function returns 0. 1 is returned when the symbol
828 should be output, 2 is returned when the symbol should be discarded. */
829 int (*elf_backend_link_output_symbol_hook)
830 (struct bfd_link_info *info, const char *, Elf_Internal_Sym *,
831 asection *, struct elf_link_hash_entry *);
833 /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend
834 linker the first time it encounters a dynamic object in the link.
835 This function must create any sections required for dynamic
836 linking. The ABFD argument is a dynamic object. The .interp,
837 .dynamic, .dynsym, .dynstr, and .hash functions have already been
838 created, and this function may modify the section flags if
839 desired. This function will normally create the .got and .plt
840 sections, but different backends have different requirements. */
841 bfd_boolean (*elf_backend_create_dynamic_sections)
842 (bfd *abfd, struct bfd_link_info *info);
844 /* When creating a shared library, determine whether to omit the
845 dynamic symbol for the section. */
846 bfd_boolean (*elf_backend_omit_section_dynsym)
847 (bfd *output_bfd, struct bfd_link_info *info, asection *osec);
849 /* Return TRUE if relocations of targets are compatible to the extent
850 that CHECK_RELOCS will properly process them. PR 4424. */
851 bfd_boolean (*relocs_compatible) (const bfd_target *, const bfd_target *);
853 /* The CHECK_RELOCS function is called by the add_symbols phase of
854 the ELF backend linker. It is called once for each section with
855 relocs of an object file, just after the symbols for the object
856 file have been added to the global linker hash table. The
857 function must look through the relocs and do any special handling
858 required. This generally means allocating space in the global
859 offset table, and perhaps allocating space for a reloc. The
860 relocs are always passed as Rela structures; if the section
861 actually uses Rel structures, the r_addend field will always be
863 bfd_boolean (*check_relocs)
864 (bfd *abfd, struct bfd_link_info *info, asection *o,
865 const Elf_Internal_Rela *relocs);
867 /* The CHECK_DIRECTIVES function is called once per input file by
868 the add_symbols phase of the ELF backend linker. The function
869 must inspect the bfd and create any additional symbols according
870 to any custom directives in the bfd. */
871 bfd_boolean (*check_directives)
872 (bfd *abfd, struct bfd_link_info *info);
874 /* The AS_NEEDED_CLEANUP function is called once per --as-needed
875 input file that was not needed by the add_symbols phase of the
876 ELF backend linker. The function must undo any target specific
877 changes in the symbol hash table. */
878 bfd_boolean (*as_needed_cleanup)
879 (bfd *abfd, struct bfd_link_info *info);
881 /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
882 linker for every symbol which is defined by a dynamic object and
883 referenced by a regular object. This is called after all the
884 input files have been seen, but before the SIZE_DYNAMIC_SECTIONS
885 function has been called. The hash table entry should be
886 bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be
887 defined in a section from a dynamic object. Dynamic object
888 sections are not included in the final link, and this function is
889 responsible for changing the value to something which the rest of
890 the link can deal with. This will normally involve adding an
891 entry to the .plt or .got or some such section, and setting the
892 symbol to point to that. */
893 bfd_boolean (*elf_backend_adjust_dynamic_symbol)
894 (struct bfd_link_info *info, struct elf_link_hash_entry *h);
896 /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker
897 after all the linker input files have been seen but before the
898 section sizes have been set. This is called after
899 ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS. */
900 bfd_boolean (*elf_backend_always_size_sections)
901 (bfd *output_bfd, struct bfd_link_info *info);
903 /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend
904 linker after all the linker input files have been seen but before
905 the sections sizes have been set. This is called after
906 ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols.
907 It is only called when linking against a dynamic object. It must
908 set the sizes of the dynamic sections, and may fill in their
909 contents as well. The generic ELF linker can handle the .dynsym,
910 .dynstr and .hash sections. This function must handle the
911 .interp section and any sections created by the
912 CREATE_DYNAMIC_SECTIONS entry point. */
913 bfd_boolean (*elf_backend_size_dynamic_sections)
914 (bfd *output_bfd, struct bfd_link_info *info);
916 /* Set TEXT_INDEX_SECTION and DATA_INDEX_SECTION, the output sections
917 we keep to use as a base for relocs and symbols. */
918 void (*elf_backend_init_index_section)
919 (bfd *output_bfd, struct bfd_link_info *info);
921 /* The RELOCATE_SECTION function is called by the ELF backend linker
922 to handle the relocations for a section.
924 The relocs are always passed as Rela structures; if the section
925 actually uses Rel structures, the r_addend field will always be
928 This function is responsible for adjust the section contents as
929 necessary, and (if using Rela relocs and generating a
930 relocatable output file) adjusting the reloc addend as
933 This function does not have to worry about setting the reloc
934 address or the reloc symbol index.
936 LOCAL_SYMS is a pointer to the swapped in local symbols.
938 LOCAL_SECTIONS is an array giving the section in the input file
939 corresponding to the st_shndx field of each local symbol.
941 The global hash table entry for the global symbols can be found
942 via elf_sym_hashes (input_bfd).
944 When generating relocatable output, this function must handle
945 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
946 going to be the section symbol corresponding to the output
947 section, which means that the addend must be adjusted
950 Returns FALSE on error, TRUE on success, 2 if successful and
951 relocations should be written for this section. */
952 int (*elf_backend_relocate_section)
953 (bfd *output_bfd, struct bfd_link_info *info, bfd *input_bfd,
954 asection *input_section, bfd_byte *contents, Elf_Internal_Rela *relocs,
955 Elf_Internal_Sym *local_syms, asection **local_sections);
957 /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend
958 linker just before it writes a symbol out to the .dynsym section.
959 The processor backend may make any required adjustment to the
960 symbol. It may also take the opportunity to set contents of the
961 dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on
962 all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called
963 on those symbols which are defined by a dynamic object. */
964 bfd_boolean (*elf_backend_finish_dynamic_symbol)
965 (bfd *output_bfd, struct bfd_link_info *info,
966 struct elf_link_hash_entry *h, Elf_Internal_Sym *sym);
968 /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend
969 linker just before it writes all the dynamic sections out to the
970 output file. The FINISH_DYNAMIC_SYMBOL will have been called on
971 all dynamic symbols. */
972 bfd_boolean (*elf_backend_finish_dynamic_sections)
973 (bfd *output_bfd, struct bfd_link_info *info);
975 /* A function to do any beginning processing needed for the ELF file
976 before building the ELF headers and computing file positions. */
977 void (*elf_backend_begin_write_processing)
978 (bfd *, struct bfd_link_info *);
980 /* A function to do any final processing needed for the ELF file
981 before writing it out. The LINKER argument is TRUE if this BFD
982 was created by the ELF backend linker. */
983 void (*elf_backend_final_write_processing)
984 (bfd *, bfd_boolean linker);
986 /* This function is called by get_program_header_size. It should
987 return the number of additional program segments which this BFD
988 will need. It should return -1 on error. */
989 int (*elf_backend_additional_program_headers)
990 (bfd *, struct bfd_link_info *);
992 /* This function is called to modify an existing segment map in a
993 backend specific fashion. */
994 bfd_boolean (*elf_backend_modify_segment_map)
995 (bfd *, struct bfd_link_info *);
997 /* This function is called to modify program headers just before
999 bfd_boolean (*elf_backend_modify_program_headers)
1000 (bfd *, struct bfd_link_info *);
1002 /* This function is called before section garbage collection to
1003 mark entry symbol sections. */
1005 (struct bfd_link_info *);
1007 /* This function is called during section garbage collection to
1008 mark sections that define global symbols. */
1009 bfd_boolean (*gc_mark_dynamic_ref)
1010 (struct elf_link_hash_entry *, void *);
1012 /* This function is called during section gc to discover the section a
1013 particular relocation refers to. */
1014 elf_gc_mark_hook_fn gc_mark_hook;
1016 /* This function, if defined, is called after the first gc marking pass
1017 to allow the backend to mark additional sections. */
1018 bfd_boolean (*gc_mark_extra_sections)
1019 (struct bfd_link_info *, elf_gc_mark_hook_fn);
1021 /* This function, if defined, is called during the sweep phase of gc
1022 in order that a backend might update any data structures it might
1024 bfd_boolean (*gc_sweep_hook)
1025 (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *);
1027 /* This function, if defined, is called after the ELF headers have
1028 been created. This allows for things like the OS and ABI versions
1030 void (*elf_backend_post_process_headers)
1031 (bfd *, struct bfd_link_info *);
1033 /* This function, if defined, prints a symbol to file and returns the
1034 name of the symbol to be printed. It should return NULL to fall
1035 back to default symbol printing. */
1036 const char *(*elf_backend_print_symbol_all)
1037 (bfd *, void *, asymbol *);
1039 /* This function, if defined, is called after all local symbols and
1040 global symbols converted to locals are emitted into the symtab
1041 section. It allows the backend to emit special local symbols
1042 not handled in the hash table. */
1043 bfd_boolean (*elf_backend_output_arch_local_syms)
1044 (bfd *, struct bfd_link_info *, void *,
1045 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym *, asection *,
1046 struct elf_link_hash_entry *));
1048 /* This function, if defined, is called after all symbols are emitted
1049 into the symtab section. It allows the backend to emit special
1050 global symbols not handled in the hash table. */
1051 bfd_boolean (*elf_backend_output_arch_syms)
1052 (bfd *, struct bfd_link_info *, void *,
1053 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym *, asection *,
1054 struct elf_link_hash_entry *));
1056 /* Copy any information related to dynamic linking from a pre-existing
1057 symbol to a newly created symbol. Also called to copy flags and
1058 other back-end info to a weakdef, in which case the symbol is not
1059 newly created and plt/got refcounts and dynamic indices should not
1061 void (*elf_backend_copy_indirect_symbol)
1062 (struct bfd_link_info *, struct elf_link_hash_entry *,
1063 struct elf_link_hash_entry *);
1065 /* Modify any information related to dynamic linking such that the
1066 symbol is not exported. */
1067 void (*elf_backend_hide_symbol)
1068 (struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean);
1070 /* A function to do additional symbol fixup, called by
1071 _bfd_elf_fix_symbol_flags. */
1072 bfd_boolean (*elf_backend_fixup_symbol)
1073 (struct bfd_link_info *, struct elf_link_hash_entry *);
1075 /* Merge the backend specific symbol attribute. */
1076 void (*elf_backend_merge_symbol_attribute)
1077 (struct elf_link_hash_entry *, const Elf_Internal_Sym *, bfd_boolean,
1080 /* This function, if defined, will return a string containing the
1081 name of a target-specific dynamic tag. */
1082 char *(*elf_backend_get_target_dtag)
1085 /* Decide whether an undefined symbol is special and can be ignored.
1086 This is the case for OPTIONAL symbols on IRIX. */
1087 bfd_boolean (*elf_backend_ignore_undef_symbol)
1088 (struct elf_link_hash_entry *);
1090 /* Emit relocations. Overrides default routine for emitting relocs,
1091 except during a relocatable link, or if all relocs are being emitted. */
1092 bfd_boolean (*elf_backend_emit_relocs)
1093 (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *,
1094 struct elf_link_hash_entry **);
1096 /* Count relocations. Not called for relocatable links
1097 or if all relocs are being preserved in the output. */
1098 unsigned int (*elf_backend_count_relocs)
1099 (struct bfd_link_info *, asection *);
1101 /* This function, if defined, is called when an NT_PRSTATUS note is found
1103 bfd_boolean (*elf_backend_grok_prstatus)
1104 (bfd *, Elf_Internal_Note *);
1106 /* This function, if defined, is called when an NT_PSINFO or NT_PRPSINFO
1107 note is found in a core file. */
1108 bfd_boolean (*elf_backend_grok_psinfo)
1109 (bfd *, Elf_Internal_Note *);
1111 /* This function, if defined, is called to write a note to a corefile. */
1112 char *(*elf_backend_write_core_note)
1113 (bfd *abfd, char *buf, int *bufsiz, int note_type, ...);
1115 /* This function, if defined, is called to convert target-specific
1116 section flag names into hex values. */
1117 flagword (*elf_backend_lookup_section_flags_hook)
1120 /* This function returns class of a reloc type. */
1121 enum elf_reloc_type_class (*elf_backend_reloc_type_class)
1122 (const Elf_Internal_Rela *);
1124 /* This function, if defined, removes information about discarded functions
1125 from other sections which mention them. */
1126 bfd_boolean (*elf_backend_discard_info)
1127 (bfd *, struct elf_reloc_cookie *, struct bfd_link_info *);
1129 /* This function, if defined, signals that the function above has removed
1130 the discarded relocations for this section. */
1131 bfd_boolean (*elf_backend_ignore_discarded_relocs)
1134 /* What to do when ld finds relocations against symbols defined in
1135 discarded sections. */
1136 unsigned int (*action_discarded)
1139 /* This function returns the width of FDE pointers in bytes, or 0 if
1140 that can't be determined for some reason. The default definition
1141 goes by the bfd's EI_CLASS. */
1142 unsigned int (*elf_backend_eh_frame_address_size)
1143 (bfd *, asection *);
1145 /* These functions tell elf-eh-frame whether to attempt to turn
1146 absolute or lsda encodings into pc-relative ones. The default
1147 definition enables these transformations. */
1148 bfd_boolean (*elf_backend_can_make_relative_eh_frame)
1149 (bfd *, struct bfd_link_info *, asection *);
1150 bfd_boolean (*elf_backend_can_make_lsda_relative_eh_frame)
1151 (bfd *, struct bfd_link_info *, asection *);
1153 /* This function returns an encoding after computing the encoded
1154 value (and storing it in ENCODED) for the given OFFSET into OSEC,
1155 to be stored in at LOC_OFFSET into the LOC_SEC input section.
1156 The default definition chooses a 32-bit PC-relative encoding. */
1157 bfd_byte (*elf_backend_encode_eh_address)
1158 (bfd *abfd, struct bfd_link_info *info,
1159 asection *osec, bfd_vma offset,
1160 asection *loc_sec, bfd_vma loc_offset,
1163 /* This function, if defined, may write out the given section.
1164 Returns TRUE if it did so and FALSE if the caller should. */
1165 bfd_boolean (*elf_backend_write_section)
1166 (bfd *, struct bfd_link_info *, asection *, bfd_byte *);
1168 /* The level of IRIX compatibility we're striving for.
1169 MIPS ELF specific function. */
1170 irix_compat_t (*elf_backend_mips_irix_compat)
1173 reloc_howto_type *(*elf_backend_mips_rtype_to_howto)
1174 (unsigned int, bfd_boolean);
1176 /* The swapping table to use when dealing with ECOFF information.
1177 Used for the MIPS ELF .mdebug section. */
1178 const struct ecoff_debug_swap *elf_backend_ecoff_debug_swap;
1180 /* This function implements `bfd_elf_bfd_from_remote_memory';
1181 see elf.c, elfcode.h. */
1182 bfd *(*elf_backend_bfd_from_remote_memory)
1183 (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep,
1184 int (*target_read_memory) (bfd_vma vma, bfd_byte *myaddr, int len));
1186 /* This function is used by `_bfd_elf_get_synthetic_symtab';
1188 bfd_vma (*plt_sym_val) (bfd_vma, const asection *, const arelent *);
1190 /* Is symbol defined in common section? */
1191 bfd_boolean (*common_definition) (Elf_Internal_Sym *);
1193 /* Return a common section index for section. */
1194 unsigned int (*common_section_index) (asection *);
1196 /* Return a common section for section. */
1197 asection *(*common_section) (asection *);
1199 /* Return TRUE if we can merge 2 definitions. */
1200 bfd_boolean (*merge_symbol) (struct bfd_link_info *,
1201 struct elf_link_hash_entry **,
1202 struct elf_link_hash_entry *,
1203 Elf_Internal_Sym *, asection **,
1204 bfd_vma *, unsigned int *,
1205 bfd_boolean *, bfd_boolean *,
1206 bfd_boolean *, bfd_boolean *,
1207 bfd_boolean *, bfd_boolean *,
1208 bfd_boolean *, bfd_boolean *,
1210 bfd_boolean *, bfd_boolean *,
1211 bfd_boolean *, bfd_boolean *,
1212 bfd *, asection **);
1214 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
1215 bfd_boolean (*elf_hash_symbol) (struct elf_link_hash_entry *);
1217 /* Return TRUE if type is a function symbol type. */
1218 bfd_boolean (*is_function_type) (unsigned int type);
1220 /* Used to handle bad SHF_LINK_ORDER input. */
1221 bfd_error_handler_type link_order_error_handler;
1223 /* Name of the PLT relocation section. */
1224 const char *relplt_name;
1226 /* Alternate EM_xxxx machine codes for this backend. */
1227 int elf_machine_alt1;
1228 int elf_machine_alt2;
1230 const struct elf_size_info *s;
1232 /* An array of target specific special sections. */
1233 const struct bfd_elf_special_section *special_sections;
1235 /* The size in bytes of the header for the GOT. This includes the
1236 so-called reserved entries on some systems. */
1237 bfd_vma got_header_size;
1239 /* The size of the GOT entry for the symbol pointed to by H if non-NULL,
1240 otherwise by the local symbol with index SYMNDX in IBFD. */
1241 bfd_vma (*got_elt_size) (bfd *, struct bfd_link_info *,
1242 struct elf_link_hash_entry *h,
1243 bfd *ibfd, unsigned long symndx);
1245 /* The vendor name to use for a processor-standard attributes section. */
1246 const char *obj_attrs_vendor;
1248 /* The section name to use for a processor-standard attributes section. */
1249 const char *obj_attrs_section;
1251 /* Return 1, 2 or 3 to indicate what type of arguments a
1252 processor-specific tag takes. */
1253 int (*obj_attrs_arg_type) (int);
1255 /* The section type to use for an attributes section. */
1256 unsigned int obj_attrs_section_type;
1258 /* This function determines the order in which any attributes are
1259 written. It must be defined for input in the range
1260 LEAST_KNOWN_OBJ_ATTRIBUTE..NUM_KNOWN_OBJ_ATTRIBUTES-1 (this range
1261 is used in order to make unity easy). The returned value is the
1262 actual tag number to place in the input position. */
1263 int (*obj_attrs_order) (int);
1265 /* Handle merging unknown attributes; either warn and return TRUE,
1266 or give an error and return FALSE. */
1267 bfd_boolean (*obj_attrs_handle_unknown) (bfd *, int);
1269 /* This is non-zero if static TLS segments require a special alignment. */
1270 unsigned static_tls_alignment;
1272 /* This is TRUE if the linker should act like collect and gather
1273 global constructors and destructors by name. This is TRUE for
1274 MIPS ELF because the Irix 5 tools can not handle the .init
1276 unsigned collect : 1;
1278 /* This is TRUE if the linker should ignore changes to the type of a
1279 symbol. This is TRUE for MIPS ELF because some Irix 5 objects
1280 record undefined functions as STT_OBJECT although the definitions
1282 unsigned type_change_ok : 1;
1284 /* Whether the backend may use REL relocations. (Some backends use
1285 both REL and RELA relocations, and this flag is set for those
1287 unsigned may_use_rel_p : 1;
1289 /* Whether the backend may use RELA relocations. (Some backends use
1290 both REL and RELA relocations, and this flag is set for those
1292 unsigned may_use_rela_p : 1;
1294 /* Whether the default relocation type is RELA. If a backend with
1295 this flag set wants REL relocations for a particular section,
1296 it must note that explicitly. Similarly, if this flag is clear,
1297 and the backend wants RELA relocations for a particular
1299 unsigned default_use_rela_p : 1;
1301 /* True if PLT and copy relocations should be RELA by default. */
1302 unsigned rela_plts_and_copies_p : 1;
1304 /* Set if RELA relocations for a relocatable link can be handled by
1305 generic code. Backends that set this flag need do nothing in the
1306 backend relocate_section routine for relocatable linking. */
1307 unsigned rela_normal : 1;
1309 /* TRUE if addresses "naturally" sign extend. This is used when
1310 swapping in from Elf32 when BFD64. */
1311 unsigned sign_extend_vma : 1;
1313 unsigned want_got_plt : 1;
1314 unsigned plt_readonly : 1;
1315 unsigned want_plt_sym : 1;
1316 unsigned plt_not_loaded : 1;
1317 unsigned plt_alignment : 4;
1318 unsigned can_gc_sections : 1;
1319 unsigned can_refcount : 1;
1320 unsigned want_got_sym : 1;
1321 unsigned want_dynbss : 1;
1323 /* Targets which do not support physical addressing often require
1324 that the p_paddr field in the section header to be set to zero.
1325 This field indicates whether this behavior is required. */
1326 unsigned want_p_paddr_set_to_zero : 1;
1328 /* True if an object file lacking a .note.GNU-stack section
1329 should be assumed to be requesting exec stack. At least one
1330 other file in the link needs to have a .note.GNU-stack section
1331 for a PT_GNU_STACK segment to be created. */
1332 unsigned default_execstack : 1;
1335 /* Information about reloc sections associated with a bfd_elf_section_data
1337 struct bfd_elf_section_reloc_data
1339 /* The ELF header for the reloc section associated with this
1341 Elf_Internal_Shdr *hdr;
1342 /* The number of relocations currently assigned to HDR. */
1344 /* The ELF section number of the reloc section. Only used for an
1347 /* Used by the backend linker to store the symbol hash table entries
1348 associated with relocs against global symbols. */
1349 struct elf_link_hash_entry **hashes;
1352 /* Information stored for each BFD section in an ELF file. This
1353 structure is allocated by elf_new_section_hook. */
1355 struct bfd_elf_section_data
1357 /* The ELF header for this section. */
1358 Elf_Internal_Shdr this_hdr;
1360 /* Information about the REL and RELA reloc sections associated
1361 with this section, if any. */
1362 struct bfd_elf_section_reloc_data rel, rela;
1364 /* The ELF section number of this section. */
1367 /* Used by the backend linker when generating a shared library to
1368 record the dynamic symbol index for a section symbol
1369 corresponding to this section. A value of 0 means that there is
1370 no dynamic symbol for this section. */
1373 /* A pointer to the linked-to section for SHF_LINK_ORDER. */
1374 asection *linked_to;
1376 /* A pointer to the swapped relocs. If the section uses REL relocs,
1377 rather than RELA, all the r_addend fields will be zero. This
1378 pointer may be NULL. It is used by the backend linker. */
1379 Elf_Internal_Rela *relocs;
1381 /* A pointer to a linked list tracking dynamic relocs copied for
1385 /* A pointer to the bfd section used for dynamic relocs. */
1389 /* Group name, if this section is a member of a group. */
1392 /* Group signature sym, if this is the SHT_GROUP section. */
1393 struct bfd_symbol *id;
1396 /* For a member of a group, points to the SHT_GROUP section.
1397 NULL for the SHT_GROUP section itself and non-group sections. */
1398 asection *sec_group;
1400 /* A linked list of member sections in the group. Circular when used by
1401 the linker. For the SHT_GROUP section, points at first member. */
1402 asection *next_in_group;
1404 /* The FDEs associated with this section. The u.fde.next_in_section
1405 field acts as a chain pointer. */
1406 struct eh_cie_fde *fde_list;
1408 /* A pointer used for various section optimizations. */
1412 #define elf_section_data(sec) ((struct bfd_elf_section_data*)(sec)->used_by_bfd)
1413 #define elf_linked_to_section(sec) (elf_section_data(sec)->linked_to)
1414 #define elf_section_type(sec) (elf_section_data(sec)->this_hdr.sh_type)
1415 #define elf_section_flags(sec) (elf_section_data(sec)->this_hdr.sh_flags)
1416 #define elf_group_name(sec) (elf_section_data(sec)->group.name)
1417 #define elf_group_id(sec) (elf_section_data(sec)->group.id)
1418 #define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group)
1419 #define elf_fde_list(sec) (elf_section_data(sec)->fde_list)
1420 #define elf_sec_group(sec) (elf_section_data(sec)->sec_group)
1422 #define xvec_get_elf_backend_data(xvec) \
1423 ((const struct elf_backend_data *) (xvec)->backend_data)
1425 #define get_elf_backend_data(abfd) \
1426 xvec_get_elf_backend_data ((abfd)->xvec)
1428 /* The least object attributes (within an attributes subsection) known
1429 for any target. Some code assumes that the value 0 is not used and
1430 the field for that attribute can instead be used as a marker to
1431 indicate that attributes have been initialized. */
1432 #define LEAST_KNOWN_OBJ_ATTRIBUTE 2
1434 /* The maximum number of known object attributes for any target. */
1435 #define NUM_KNOWN_OBJ_ATTRIBUTES 71
1437 /* The value of an object attribute. The type indicates whether the attribute
1438 holds and integer, a string, or both. It can also indicate that there can
1439 be no default (i.e. all values must be written to file, even zero). */
1441 typedef struct obj_attribute
1443 #define ATTR_TYPE_FLAG_INT_VAL (1 << 0)
1444 #define ATTR_TYPE_FLAG_STR_VAL (1 << 1)
1445 #define ATTR_TYPE_FLAG_NO_DEFAULT (1 << 2)
1447 #define ATTR_TYPE_HAS_INT_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_INT_VAL)
1448 #define ATTR_TYPE_HAS_STR_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_STR_VAL)
1449 #define ATTR_TYPE_HAS_NO_DEFAULT(TYPE) ((TYPE) & ATTR_TYPE_FLAG_NO_DEFAULT)
1456 typedef struct obj_attribute_list
1458 struct obj_attribute_list *next;
1461 } obj_attribute_list;
1463 /* Object attributes may either be defined by the processor ABI, index
1464 OBJ_ATTR_PROC in the *_obj_attributes arrays, or be GNU-specific
1465 (and possibly also processor-specific), index OBJ_ATTR_GNU. */
1466 #define OBJ_ATTR_PROC 0
1467 #define OBJ_ATTR_GNU 1
1468 #define OBJ_ATTR_FIRST OBJ_ATTR_PROC
1469 #define OBJ_ATTR_LAST OBJ_ATTR_GNU
1471 /* The following object attribute tags are taken as generic, for all
1472 targets and for "gnu" where there is no target standard. */
1479 Tag_compatibility = 32
1482 /* The following struct stores information about every SystemTap section
1483 found in the object file. */
1486 struct sdt_note *next;
1491 /* Some private data is stashed away for future use using the tdata pointer
1492 in the bfd structure. */
1494 struct elf_obj_tdata
1496 Elf_Internal_Ehdr elf_header[1]; /* Actual data, but ref like ptr */
1497 Elf_Internal_Shdr **elf_sect_ptr;
1498 Elf_Internal_Phdr *phdr;
1499 struct elf_segment_map *segment_map;
1500 struct elf_strtab_hash *strtab_ptr;
1503 unsigned int num_elf_sections; /* elf_sect_ptr size */
1504 int num_section_syms;
1505 asymbol **section_syms; /* STT_SECTION symbols for each section */
1506 Elf_Internal_Shdr symtab_hdr;
1507 Elf_Internal_Shdr shstrtab_hdr;
1508 Elf_Internal_Shdr strtab_hdr;
1509 Elf_Internal_Shdr dynsymtab_hdr;
1510 Elf_Internal_Shdr dynstrtab_hdr;
1511 Elf_Internal_Shdr dynversym_hdr;
1512 Elf_Internal_Shdr dynverref_hdr;
1513 Elf_Internal_Shdr dynverdef_hdr;
1514 Elf_Internal_Shdr symtab_shndx_hdr;
1515 unsigned int symtab_section, shstrtab_section;
1516 unsigned int strtab_section, dynsymtab_section;
1517 unsigned int symtab_shndx_section;
1518 unsigned int dynversym_section, dynverdef_section, dynverref_section;
1519 file_ptr next_file_pos;
1520 bfd_vma gp; /* The gp value */
1521 unsigned int gp_size; /* The gp size */
1523 /* Information grabbed from an elf core file. */
1530 /* A mapping from external symbols to entries in the linker hash
1531 table, used when linking. This is indexed by the symbol index
1532 minus the sh_info field of the symbol table header. */
1533 struct elf_link_hash_entry **sym_hashes;
1535 /* Track usage and final offsets of GOT entries for local symbols.
1536 This array is indexed by symbol index. Elements are used
1537 identically to "got" in struct elf_link_hash_entry. */
1540 bfd_signed_vma *refcounts;
1542 struct got_entry **ents;
1545 /* The linker ELF emulation code needs to let the backend ELF linker
1546 know what filename should be used for a dynamic object if the
1547 dynamic object is found using a search. The emulation code then
1548 sometimes needs to know what name was actually used. Until the
1549 file has been added to the linker symbol table, this field holds
1550 the name the linker wants. After it has been added, it holds the
1551 name actually used, which will be the DT_SONAME entry if there is
1553 const char *dt_name;
1555 /* The linker emulation needs to know what audit libs
1556 are used by a dynamic object. */
1557 const char *dt_audit;
1559 /* Records the result of `get_program_header_size'. */
1560 bfd_size_type program_header_size;
1562 /* Used by find_nearest_line entry point. */
1565 /* Used by MIPS ELF find_nearest_line entry point. The structure
1566 could be included directly in this one, but there's no point to
1567 wasting the memory just for the infrequently called
1568 find_nearest_line. */
1569 struct mips_elf_find_line *find_line_info;
1571 /* A place to stash dwarf1 info for this bfd. */
1572 struct dwarf1_debug *dwarf1_find_line_info;
1574 /* A place to stash dwarf2 info for this bfd. */
1575 void *dwarf2_find_line_info;
1577 /* An array of stub sections indexed by symbol number, used by the
1578 MIPS ELF linker. FIXME: We should figure out some way to only
1579 include this field for a MIPS ELF target. */
1580 asection **local_stubs;
1581 asection **local_call_stubs;
1583 /* Used to determine if PT_GNU_EH_FRAME segment header should be
1585 asection *eh_frame_hdr;
1587 Elf_Internal_Shdr **group_sect_ptr;
1590 /* Number of symbol version definitions we are about to emit. */
1591 unsigned int cverdefs;
1593 /* Number of symbol version references we are about to emit. */
1594 unsigned int cverrefs;
1596 /* Segment flags for the PT_GNU_STACK segment. */
1597 unsigned int stack_flags;
1599 /* Symbol version definitions in external objects. */
1600 Elf_Internal_Verdef *verdef;
1602 /* Symbol version references to external objects. */
1603 Elf_Internal_Verneed *verref;
1605 /* The Irix 5 support uses two virtual sections, which represent
1606 text/data symbols defined in dynamic objects. */
1607 asymbol *elf_data_symbol;
1608 asymbol *elf_text_symbol;
1609 asection *elf_data_section;
1610 asection *elf_text_section;
1612 /* A pointer to the .eh_frame section. */
1613 asection *eh_frame_section;
1615 /* Whether a dyanmic object was specified normally on the linker
1616 command line, or was specified when --as-needed was in effect,
1617 or was found via a DT_NEEDED entry. */
1618 enum dynamic_lib_link_class dyn_lib_class;
1620 /* This is set to TRUE if the object was created by the backend
1624 /* Irix 5 often screws up the symbol table, sorting local symbols
1625 after global symbols. This flag is set if the symbol table in
1626 this BFD appears to be screwed up. If it is, we ignore the
1627 sh_info field in the symbol table header, and always read all the
1629 bfd_boolean bad_symtab;
1631 /* Used to determine if the e_flags field has been initialized */
1632 bfd_boolean flags_init;
1634 /* Symbol buffer. */
1637 obj_attribute known_obj_attributes[2][NUM_KNOWN_OBJ_ATTRIBUTES];
1638 obj_attribute_list *other_obj_attributes[2];
1640 /* Called at the end of _bfd_elf_write_object_contents if not NULL. */
1641 bfd_boolean (*after_write_object_contents) (bfd *);
1642 void *after_write_object_contents_info;
1644 /* NT_GNU_BUILD_ID note type. */
1645 bfd_size_type build_id_size;
1648 /* Linked-list containing information about every Systemtap section
1649 found in the object file. Each section corresponds to one entry
1651 struct sdt_note *sdt_note_head;
1653 /* True if the bfd contains symbols that have the STT_GNU_IFUNC
1654 symbol type or STB_GNU_UNIQUE binding. Used to set the osabi
1655 field in the ELF header structure. */
1656 bfd_boolean has_gnu_symbols;
1658 /* An identifier used to distinguish different target
1659 specific extensions to this structure. */
1660 enum elf_target_id object_id;
1663 #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
1665 #define elf_object_id(bfd) (elf_tdata(bfd) -> object_id)
1666 #define elf_program_header_size(bfd) (elf_tdata(bfd) -> program_header_size)
1667 #define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header)
1668 #define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr)
1669 #define elf_numsections(bfd) (elf_tdata(bfd) -> num_elf_sections)
1670 #define elf_shstrtab(bfd) (elf_tdata(bfd) -> strtab_ptr)
1671 #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section)
1672 #define elf_symtab_shndx(bfd) (elf_tdata(bfd) -> symtab_shndx_section)
1673 #define elf_symtab_hdr(bfd) (elf_tdata(bfd) -> symtab_hdr)
1674 #define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section)
1675 #define elf_dynversym(bfd) (elf_tdata(bfd) -> dynversym_section)
1676 #define elf_dynverdef(bfd) (elf_tdata(bfd) -> dynverdef_section)
1677 #define elf_dynverref(bfd) (elf_tdata(bfd) -> dynverref_section)
1678 #define elf_eh_frame_section(bfd) \
1679 (elf_tdata(bfd) -> eh_frame_section)
1680 #define elf_num_locals(bfd) (elf_tdata(bfd) -> num_locals)
1681 #define elf_num_globals(bfd) (elf_tdata(bfd) -> num_globals)
1682 #define elf_section_syms(bfd) (elf_tdata(bfd) -> section_syms)
1683 #define elf_num_section_syms(bfd) (elf_tdata(bfd) -> num_section_syms)
1684 #define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
1685 #define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
1686 #define elf_gp(bfd) (elf_tdata(bfd) -> gp)
1687 #define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size)
1688 #define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes)
1689 #define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts)
1690 #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets)
1691 #define elf_local_got_ents(bfd) (elf_tdata(bfd) -> local_got.ents)
1692 #define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name)
1693 #define elf_dt_audit(bfd) (elf_tdata(bfd) -> dt_audit)
1694 #define elf_dyn_lib_class(bfd) (elf_tdata(bfd) -> dyn_lib_class)
1695 #define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab)
1696 #define elf_flags_init(bfd) (elf_tdata(bfd) -> flags_init)
1697 #define elf_known_obj_attributes(bfd) (elf_tdata (bfd) -> known_obj_attributes)
1698 #define elf_other_obj_attributes(bfd) (elf_tdata (bfd) -> other_obj_attributes)
1699 #define elf_known_obj_attributes_proc(bfd) \
1700 (elf_known_obj_attributes (bfd) [OBJ_ATTR_PROC])
1701 #define elf_other_obj_attributes_proc(bfd) \
1702 (elf_other_obj_attributes (bfd) [OBJ_ATTR_PROC])
1704 extern void _bfd_elf_swap_verdef_in
1705 (bfd *, const Elf_External_Verdef *, Elf_Internal_Verdef *);
1706 extern void _bfd_elf_swap_verdef_out
1707 (bfd *, const Elf_Internal_Verdef *, Elf_External_Verdef *);
1708 extern void _bfd_elf_swap_verdaux_in
1709 (bfd *, const Elf_External_Verdaux *, Elf_Internal_Verdaux *);
1710 extern void _bfd_elf_swap_verdaux_out
1711 (bfd *, const Elf_Internal_Verdaux *, Elf_External_Verdaux *);
1712 extern void _bfd_elf_swap_verneed_in
1713 (bfd *, const Elf_External_Verneed *, Elf_Internal_Verneed *);
1714 extern void _bfd_elf_swap_verneed_out
1715 (bfd *, const Elf_Internal_Verneed *, Elf_External_Verneed *);
1716 extern void _bfd_elf_swap_vernaux_in
1717 (bfd *, const Elf_External_Vernaux *, Elf_Internal_Vernaux *);
1718 extern void _bfd_elf_swap_vernaux_out
1719 (bfd *, const Elf_Internal_Vernaux *, Elf_External_Vernaux *);
1720 extern void _bfd_elf_swap_versym_in
1721 (bfd *, const Elf_External_Versym *, Elf_Internal_Versym *);
1722 extern void _bfd_elf_swap_versym_out
1723 (bfd *, const Elf_Internal_Versym *, Elf_External_Versym *);
1725 extern unsigned int _bfd_elf_section_from_bfd_section
1726 (bfd *, asection *);
1727 extern char *bfd_elf_string_from_elf_section
1728 (bfd *, unsigned, unsigned);
1729 extern Elf_Internal_Sym *bfd_elf_get_elf_syms
1730 (bfd *, Elf_Internal_Shdr *, size_t, size_t, Elf_Internal_Sym *, void *,
1731 Elf_External_Sym_Shndx *);
1732 extern const char *bfd_elf_sym_name
1733 (bfd *, Elf_Internal_Shdr *, Elf_Internal_Sym *, asection *);
1735 extern bfd_boolean _bfd_elf_copy_private_bfd_data
1737 extern bfd_boolean _bfd_elf_print_private_bfd_data
1739 extern void bfd_elf_print_symbol
1740 (bfd *, void *, asymbol *, bfd_print_symbol_type);
1742 extern unsigned int _bfd_elf_eh_frame_address_size
1743 (bfd *, asection *);
1744 extern bfd_byte _bfd_elf_encode_eh_address
1745 (bfd *abfd, struct bfd_link_info *info, asection *osec, bfd_vma offset,
1746 asection *loc_sec, bfd_vma loc_offset, bfd_vma *encoded);
1747 extern bfd_boolean _bfd_elf_can_make_relative
1748 (bfd *input_bfd, struct bfd_link_info *info, asection *eh_frame_section);
1750 extern enum elf_reloc_type_class _bfd_elf_reloc_type_class
1751 (const Elf_Internal_Rela *);
1752 extern bfd_vma _bfd_elf_rela_local_sym
1753 (bfd *, Elf_Internal_Sym *, asection **, Elf_Internal_Rela *);
1754 extern bfd_vma _bfd_elf_rel_local_sym
1755 (bfd *, Elf_Internal_Sym *, asection **, bfd_vma);
1756 extern bfd_vma _bfd_elf_section_offset
1757 (bfd *, struct bfd_link_info *, asection *, bfd_vma);
1759 extern unsigned long bfd_elf_hash
1761 extern unsigned long bfd_elf_gnu_hash
1764 extern bfd_reloc_status_type bfd_elf_generic_reloc
1765 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
1766 extern bfd_boolean bfd_elf_allocate_object
1767 (bfd *, size_t, enum elf_target_id);
1768 extern bfd_boolean bfd_elf_make_object
1770 extern bfd_boolean bfd_elf_mkcorefile
1772 extern bfd_boolean _bfd_elf_make_section_from_shdr
1773 (bfd *, Elf_Internal_Shdr *, const char *, int);
1774 extern bfd_boolean _bfd_elf_make_section_from_phdr
1775 (bfd *, Elf_Internal_Phdr *, int, const char *);
1776 extern struct bfd_hash_entry *_bfd_elf_link_hash_newfunc
1777 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
1778 extern struct bfd_link_hash_table *_bfd_elf_link_hash_table_create
1780 extern void _bfd_elf_link_hash_copy_indirect
1781 (struct bfd_link_info *, struct elf_link_hash_entry *,
1782 struct elf_link_hash_entry *);
1783 extern void _bfd_elf_link_hash_hide_symbol
1784 (struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean);
1785 extern bfd_boolean _bfd_elf_link_hash_fixup_symbol
1786 (struct bfd_link_info *, struct elf_link_hash_entry *);
1787 extern bfd_boolean _bfd_elf_link_hash_table_init
1788 (struct elf_link_hash_table *, bfd *,
1789 struct bfd_hash_entry *(*)
1790 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *),
1791 unsigned int, enum elf_target_id);
1792 extern bfd_boolean _bfd_elf_slurp_version_tables
1793 (bfd *, bfd_boolean);
1794 extern bfd_boolean _bfd_elf_merge_sections
1795 (bfd *, struct bfd_link_info *);
1796 extern bfd_boolean _bfd_elf_match_sections_by_type
1797 (bfd *, const asection *, bfd *, const asection *);
1798 extern bfd_boolean bfd_elf_is_group_section
1799 (bfd *, const struct bfd_section *);
1800 extern void _bfd_elf_section_already_linked
1801 (bfd *, struct already_linked *, struct bfd_link_info *);
1802 extern void bfd_elf_set_group_contents
1803 (bfd *, asection *, void *);
1804 extern asection *_bfd_elf_check_kept_section
1805 (asection *, struct bfd_link_info *);
1806 extern void _bfd_elf_link_just_syms
1807 (asection *, struct bfd_link_info *);
1808 extern void _bfd_elf_copy_link_hash_symbol_type
1809 (bfd *, struct bfd_link_hash_entry *, struct bfd_link_hash_entry *);
1810 extern bfd_boolean _bfd_elf_size_group_sections
1811 (struct bfd_link_info *);
1812 extern bfd_boolean _bfd_elf_fixup_group_sections
1813 (bfd *, asection *);
1814 extern bfd_boolean _bfd_elf_copy_private_header_data
1816 extern bfd_boolean _bfd_elf_copy_private_symbol_data
1817 (bfd *, asymbol *, bfd *, asymbol *);
1818 #define _bfd_generic_init_private_section_data \
1819 _bfd_elf_init_private_section_data
1820 extern bfd_boolean _bfd_elf_init_private_section_data
1821 (bfd *, asection *, bfd *, asection *, struct bfd_link_info *);
1822 extern bfd_boolean _bfd_elf_copy_private_section_data
1823 (bfd *, asection *, bfd *, asection *);
1824 extern bfd_boolean _bfd_elf_write_object_contents
1826 extern bfd_boolean _bfd_elf_write_corefile_contents
1828 extern bfd_boolean _bfd_elf_set_section_contents
1829 (bfd *, sec_ptr, const void *, file_ptr, bfd_size_type);
1830 extern long _bfd_elf_get_symtab_upper_bound
1832 extern long _bfd_elf_canonicalize_symtab
1833 (bfd *, asymbol **);
1834 extern long _bfd_elf_get_dynamic_symtab_upper_bound
1836 extern long _bfd_elf_canonicalize_dynamic_symtab
1837 (bfd *, asymbol **);
1838 extern long _bfd_elf_get_synthetic_symtab
1839 (bfd *, long, asymbol **, long, asymbol **, asymbol **);
1840 extern long _bfd_elf_get_reloc_upper_bound
1842 extern long _bfd_elf_canonicalize_reloc
1843 (bfd *, sec_ptr, arelent **, asymbol **);
1844 extern asection * _bfd_elf_get_dynamic_reloc_section
1845 (bfd *, asection *, bfd_boolean);
1846 extern asection * _bfd_elf_make_dynamic_reloc_section
1847 (asection *, bfd *, unsigned int, bfd *, bfd_boolean);
1848 extern long _bfd_elf_get_dynamic_reloc_upper_bound
1850 extern long _bfd_elf_canonicalize_dynamic_reloc
1851 (bfd *, arelent **, asymbol **);
1852 extern asymbol *_bfd_elf_make_empty_symbol
1854 extern void _bfd_elf_get_symbol_info
1855 (bfd *, asymbol *, symbol_info *);
1856 extern bfd_boolean _bfd_elf_is_local_label_name
1857 (bfd *, const char *);
1858 extern alent *_bfd_elf_get_lineno
1860 extern bfd_boolean _bfd_elf_set_arch_mach
1861 (bfd *, enum bfd_architecture, unsigned long);
1862 extern bfd_boolean _bfd_elf_find_nearest_line
1863 (bfd *, asection *, asymbol **, bfd_vma, const char **, const char **,
1865 extern bfd_boolean _bfd_elf_find_line
1866 (bfd *, asymbol **, asymbol *, const char **, unsigned int *);
1867 #define _bfd_generic_find_line _bfd_elf_find_line
1868 extern bfd_boolean _bfd_elf_find_inliner_info
1869 (bfd *, const char **, const char **, unsigned int *);
1870 #define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols
1871 #define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
1872 extern int _bfd_elf_sizeof_headers
1873 (bfd *, struct bfd_link_info *);
1874 extern bfd_boolean _bfd_elf_new_section_hook
1875 (bfd *, asection *);
1876 extern bfd_boolean _bfd_elf_init_reloc_shdr
1877 (bfd *, struct bfd_elf_section_reloc_data *, asection *, bfd_boolean);
1878 extern const struct bfd_elf_special_section *_bfd_elf_get_special_section
1879 (const char *, const struct bfd_elf_special_section *, unsigned int);
1880 extern const struct bfd_elf_special_section *_bfd_elf_get_sec_type_attr
1881 (bfd *, asection *);
1883 /* If the target doesn't have reloc handling written yet: */
1884 extern void _bfd_elf_no_info_to_howto
1885 (bfd *, arelent *, Elf_Internal_Rela *);
1887 extern bfd_boolean bfd_section_from_shdr
1888 (bfd *, unsigned int shindex);
1889 extern bfd_boolean bfd_section_from_phdr
1890 (bfd *, Elf_Internal_Phdr *, int);
1892 extern int _bfd_elf_symbol_from_bfd_symbol
1893 (bfd *, asymbol **);
1895 extern Elf_Internal_Sym *bfd_sym_from_r_symndx
1896 (struct sym_cache *, bfd *, unsigned long);
1897 extern asection *bfd_section_from_elf_index
1898 (bfd *, unsigned int);
1899 extern struct bfd_strtab_hash *_bfd_elf_stringtab_init
1902 extern struct elf_strtab_hash * _bfd_elf_strtab_init
1904 extern void _bfd_elf_strtab_free
1905 (struct elf_strtab_hash *);
1906 extern bfd_size_type _bfd_elf_strtab_add
1907 (struct elf_strtab_hash *, const char *, bfd_boolean);
1908 extern void _bfd_elf_strtab_addref
1909 (struct elf_strtab_hash *, bfd_size_type);
1910 extern void _bfd_elf_strtab_delref
1911 (struct elf_strtab_hash *, bfd_size_type);
1912 extern void _bfd_elf_strtab_clear_all_refs
1913 (struct elf_strtab_hash *);
1914 extern bfd_size_type _bfd_elf_strtab_size
1915 (struct elf_strtab_hash *);
1916 extern bfd_size_type _bfd_elf_strtab_offset
1917 (struct elf_strtab_hash *, bfd_size_type);
1918 extern bfd_boolean _bfd_elf_strtab_emit
1919 (bfd *, struct elf_strtab_hash *);
1920 extern void _bfd_elf_strtab_finalize
1921 (struct elf_strtab_hash *);
1923 extern void _bfd_elf_begin_eh_frame_parsing
1924 (struct bfd_link_info *info);
1925 extern void _bfd_elf_parse_eh_frame
1926 (bfd *, struct bfd_link_info *, asection *, struct elf_reloc_cookie *);
1927 extern void _bfd_elf_end_eh_frame_parsing
1928 (struct bfd_link_info *info);
1930 extern bfd_boolean _bfd_elf_discard_section_eh_frame
1931 (bfd *, struct bfd_link_info *, asection *,
1932 bfd_boolean (*) (bfd_vma, void *), struct elf_reloc_cookie *);
1933 extern bfd_boolean _bfd_elf_discard_section_eh_frame_hdr
1934 (bfd *, struct bfd_link_info *);
1935 extern bfd_vma _bfd_elf_eh_frame_section_offset
1936 (bfd *, struct bfd_link_info *, asection *, bfd_vma);
1937 extern bfd_boolean _bfd_elf_write_section_eh_frame
1938 (bfd *, struct bfd_link_info *, asection *, bfd_byte *);
1939 extern bfd_boolean _bfd_elf_write_section_eh_frame_hdr
1940 (bfd *, struct bfd_link_info *);
1941 extern bfd_boolean _bfd_elf_maybe_strip_eh_frame_hdr
1942 (struct bfd_link_info *);
1944 extern bfd_boolean _bfd_elf_merge_symbol
1945 (bfd *, struct bfd_link_info *, const char *, Elf_Internal_Sym *,
1946 asection **, bfd_vma *, unsigned int *,
1947 struct elf_link_hash_entry **, bfd_boolean *,
1948 bfd_boolean *, bfd_boolean *, bfd_boolean *);
1950 extern bfd_boolean _bfd_elf_hash_symbol (struct elf_link_hash_entry *);
1952 extern long _bfd_elf_link_lookup_local_dynindx
1953 (struct bfd_link_info *, bfd *, long);
1954 extern bfd_boolean _bfd_elf_compute_section_file_positions
1955 (bfd *, struct bfd_link_info *);
1956 extern void _bfd_elf_assign_file_positions_for_relocs
1958 extern file_ptr _bfd_elf_assign_file_position_for_section
1959 (Elf_Internal_Shdr *, file_ptr, bfd_boolean);
1961 extern bfd_boolean _bfd_elf_validate_reloc
1964 extern bfd_boolean _bfd_elf_link_create_dynamic_sections
1965 (bfd *, struct bfd_link_info *);
1966 extern bfd_boolean _bfd_elf_link_omit_section_dynsym
1967 (bfd *, struct bfd_link_info *, asection *);
1968 extern bfd_boolean _bfd_elf_create_dynamic_sections
1969 (bfd *, struct bfd_link_info *);
1970 extern bfd_boolean _bfd_elf_create_got_section
1971 (bfd *, struct bfd_link_info *);
1972 extern struct elf_link_hash_entry *_bfd_elf_define_linkage_sym
1973 (bfd *, struct bfd_link_info *, asection *, const char *);
1974 extern void _bfd_elf_init_1_index_section
1975 (bfd *, struct bfd_link_info *);
1976 extern void _bfd_elf_init_2_index_sections
1977 (bfd *, struct bfd_link_info *);
1979 extern bfd_boolean _bfd_elfcore_make_pseudosection
1980 (bfd *, char *, size_t, ufile_ptr);
1981 extern char *_bfd_elfcore_strndup
1982 (bfd *, char *, size_t);
1984 extern Elf_Internal_Rela *_bfd_elf_link_read_relocs
1985 (bfd *, asection *, void *, Elf_Internal_Rela *, bfd_boolean);
1987 extern bfd_boolean _bfd_elf_link_output_relocs
1988 (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *,
1989 struct elf_link_hash_entry **);
1991 extern bfd_boolean _bfd_elf_adjust_dynamic_copy
1992 (struct elf_link_hash_entry *, asection *);
1994 extern bfd_boolean _bfd_elf_dynamic_symbol_p
1995 (struct elf_link_hash_entry *, struct bfd_link_info *, bfd_boolean);
1997 extern bfd_boolean _bfd_elf_symbol_refs_local_p
1998 (struct elf_link_hash_entry *, struct bfd_link_info *, bfd_boolean);
2000 extern bfd_reloc_status_type bfd_elf_perform_complex_relocation
2001 (bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, bfd_vma);
2003 extern bfd_boolean _bfd_elf_setup_sections
2006 extern void _bfd_elf_set_osabi (bfd * , struct bfd_link_info *);
2008 extern const bfd_target *bfd_elf32_object_p
2010 extern const bfd_target *bfd_elf32_core_file_p
2012 extern char *bfd_elf32_core_file_failing_command
2014 extern int bfd_elf32_core_file_failing_signal
2016 extern bfd_boolean bfd_elf32_core_file_matches_executable_p
2018 extern int bfd_elf32_core_file_pid
2021 extern bfd_boolean bfd_elf32_swap_symbol_in
2022 (bfd *, const void *, const void *, Elf_Internal_Sym *);
2023 extern void bfd_elf32_swap_symbol_out
2024 (bfd *, const Elf_Internal_Sym *, void *, void *);
2025 extern void bfd_elf32_swap_reloc_in
2026 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
2027 extern void bfd_elf32_swap_reloc_out
2028 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
2029 extern void bfd_elf32_swap_reloca_in
2030 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
2031 extern void bfd_elf32_swap_reloca_out
2032 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
2033 extern void bfd_elf32_swap_phdr_in
2034 (bfd *, const Elf32_External_Phdr *, Elf_Internal_Phdr *);
2035 extern void bfd_elf32_swap_phdr_out
2036 (bfd *, const Elf_Internal_Phdr *, Elf32_External_Phdr *);
2037 extern void bfd_elf32_swap_dyn_in
2038 (bfd *, const void *, Elf_Internal_Dyn *);
2039 extern void bfd_elf32_swap_dyn_out
2040 (bfd *, const Elf_Internal_Dyn *, void *);
2041 extern long bfd_elf32_slurp_symbol_table
2042 (bfd *, asymbol **, bfd_boolean);
2043 extern bfd_boolean bfd_elf32_write_shdrs_and_ehdr
2045 extern int bfd_elf32_write_out_phdrs
2046 (bfd *, const Elf_Internal_Phdr *, unsigned int);
2047 extern bfd_boolean bfd_elf32_checksum_contents
2048 (bfd * , void (*) (const void *, size_t, void *), void *);
2049 extern void bfd_elf32_write_relocs
2050 (bfd *, asection *, void *);
2051 extern bfd_boolean bfd_elf32_slurp_reloc_table
2052 (bfd *, asection *, asymbol **, bfd_boolean);
2054 extern const bfd_target *bfd_elf64_object_p
2056 extern const bfd_target *bfd_elf64_core_file_p
2058 extern char *bfd_elf64_core_file_failing_command
2060 extern int bfd_elf64_core_file_failing_signal
2062 extern bfd_boolean bfd_elf64_core_file_matches_executable_p
2064 extern int bfd_elf64_core_file_pid
2067 extern bfd_boolean bfd_elf64_swap_symbol_in
2068 (bfd *, const void *, const void *, Elf_Internal_Sym *);
2069 extern void bfd_elf64_swap_symbol_out
2070 (bfd *, const Elf_Internal_Sym *, void *, void *);
2071 extern void bfd_elf64_swap_reloc_in
2072 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
2073 extern void bfd_elf64_swap_reloc_out
2074 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
2075 extern void bfd_elf64_swap_reloca_in
2076 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
2077 extern void bfd_elf64_swap_reloca_out
2078 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
2079 extern void bfd_elf64_swap_phdr_in
2080 (bfd *, const Elf64_External_Phdr *, Elf_Internal_Phdr *);
2081 extern void bfd_elf64_swap_phdr_out
2082 (bfd *, const Elf_Internal_Phdr *, Elf64_External_Phdr *);
2083 extern void bfd_elf64_swap_dyn_in
2084 (bfd *, const void *, Elf_Internal_Dyn *);
2085 extern void bfd_elf64_swap_dyn_out
2086 (bfd *, const Elf_Internal_Dyn *, void *);
2087 extern long bfd_elf64_slurp_symbol_table
2088 (bfd *, asymbol **, bfd_boolean);
2089 extern bfd_boolean bfd_elf64_write_shdrs_and_ehdr
2091 extern int bfd_elf64_write_out_phdrs
2092 (bfd *, const Elf_Internal_Phdr *, unsigned int);
2093 extern bfd_boolean bfd_elf64_checksum_contents
2094 (bfd * , void (*) (const void *, size_t, void *), void *);
2095 extern void bfd_elf64_write_relocs
2096 (bfd *, asection *, void *);
2097 extern bfd_boolean bfd_elf64_slurp_reloc_table
2098 (bfd *, asection *, asymbol **, bfd_boolean);
2100 extern bfd_boolean _bfd_elf_default_relocs_compatible
2101 (const bfd_target *, const bfd_target *);
2103 extern bfd_boolean _bfd_elf_relocs_compatible
2104 (const bfd_target *, const bfd_target *);
2106 extern struct elf_link_hash_entry *_bfd_elf_archive_symbol_lookup
2107 (bfd *, struct bfd_link_info *, const char *);
2108 extern bfd_boolean bfd_elf_link_add_symbols
2109 (bfd *, struct bfd_link_info *);
2110 extern bfd_boolean _bfd_elf_add_dynamic_entry
2111 (struct bfd_link_info *, bfd_vma, bfd_vma);
2113 extern bfd_boolean bfd_elf_link_record_dynamic_symbol
2114 (struct bfd_link_info *, struct elf_link_hash_entry *);
2116 extern int bfd_elf_link_record_local_dynamic_symbol
2117 (struct bfd_link_info *, bfd *, long);
2119 extern bfd_boolean _bfd_elf_close_and_cleanup
2122 extern bfd_boolean _bfd_elf_common_definition
2123 (Elf_Internal_Sym *);
2125 extern unsigned int _bfd_elf_common_section_index
2128 extern asection *_bfd_elf_common_section
2131 extern void _bfd_dwarf2_cleanup_debug_info
2134 extern bfd_vma _bfd_elf_default_got_elt_size
2135 (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, bfd *,
2138 extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn
2139 (bfd *, arelent *, struct bfd_symbol *, void *,
2140 asection *, bfd *, char **);
2142 extern bfd_boolean bfd_elf_final_link
2143 (bfd *, struct bfd_link_info *);
2145 extern void _bfd_elf_gc_keep
2146 (struct bfd_link_info *info);
2148 extern bfd_boolean bfd_elf_gc_mark_dynamic_ref_symbol
2149 (struct elf_link_hash_entry *h, void *inf);
2151 extern bfd_boolean bfd_elf_gc_sections
2152 (bfd *, struct bfd_link_info *);
2154 extern bfd_boolean bfd_elf_gc_record_vtinherit
2155 (bfd *, asection *, struct elf_link_hash_entry *, bfd_vma);
2157 extern bfd_boolean bfd_elf_gc_record_vtentry
2158 (bfd *, asection *, struct elf_link_hash_entry *, bfd_vma);
2160 extern asection *_bfd_elf_gc_mark_hook
2161 (asection *, struct bfd_link_info *, Elf_Internal_Rela *,
2162 struct elf_link_hash_entry *, Elf_Internal_Sym *);
2164 extern asection *_bfd_elf_gc_mark_rsec
2165 (struct bfd_link_info *, asection *, elf_gc_mark_hook_fn,
2166 struct elf_reloc_cookie *);
2168 extern bfd_boolean _bfd_elf_gc_mark_reloc
2169 (struct bfd_link_info *, asection *, elf_gc_mark_hook_fn,
2170 struct elf_reloc_cookie *);
2172 extern bfd_boolean _bfd_elf_gc_mark_fdes
2173 (struct bfd_link_info *, asection *, asection *, elf_gc_mark_hook_fn,
2174 struct elf_reloc_cookie *);
2176 extern bfd_boolean _bfd_elf_gc_mark
2177 (struct bfd_link_info *, asection *, elf_gc_mark_hook_fn);
2179 extern bfd_boolean _bfd_elf_gc_mark_extra_sections
2180 (struct bfd_link_info *, elf_gc_mark_hook_fn);
2182 extern bfd_boolean bfd_elf_gc_common_finalize_got_offsets
2183 (bfd *, struct bfd_link_info *);
2185 extern bfd_boolean bfd_elf_gc_common_final_link
2186 (bfd *, struct bfd_link_info *);
2188 extern bfd_boolean bfd_elf_reloc_symbol_deleted_p
2191 extern struct elf_segment_map * _bfd_elf_make_dynamic_segment
2192 (bfd *, asection *);
2194 extern bfd_boolean _bfd_elf_map_sections_to_segments
2195 (bfd *, struct bfd_link_info *);
2197 extern bfd_boolean _bfd_elf_is_function_type (unsigned int);
2199 extern int bfd_elf_get_default_section_type (flagword);
2201 extern void bfd_elf_lookup_section_flags
2202 (struct bfd_link_info *, struct flag_info *);
2204 extern Elf_Internal_Phdr * _bfd_elf_find_segment_containing_section
2205 (bfd * abfd, asection * section);
2207 /* Exported interface for writing elf corefile notes. */
2208 extern char *elfcore_write_note
2209 (bfd *, char *, int *, const char *, int, const void *, int);
2210 extern char *elfcore_write_prpsinfo
2211 (bfd *, char *, int *, const char *, const char *);
2212 extern char *elfcore_write_prstatus
2213 (bfd *, char *, int *, long, int, const void *);
2214 extern char * elfcore_write_pstatus
2215 (bfd *, char *, int *, long, int, const void *);
2216 extern char *elfcore_write_prfpreg
2217 (bfd *, char *, int *, const void *, int);
2218 extern char *elfcore_write_prxfpreg
2219 (bfd *, char *, int *, const void *, int);
2220 extern char *elfcore_write_xstatereg
2221 (bfd *, char *, int *, const void *, int);
2222 extern char *elfcore_write_ppc_vmx
2223 (bfd *, char *, int *, const void *, int);
2224 extern char *elfcore_write_ppc_vsx
2225 (bfd *, char *, int *, const void *, int);
2226 extern char *elfcore_write_s390_timer
2227 (bfd *, char *, int *, const void *, int);
2228 extern char *elfcore_write_s390_todcmp
2229 (bfd *, char *, int *, const void *, int);
2230 extern char *elfcore_write_s390_todpreg
2231 (bfd *, char *, int *, const void *, int);
2232 extern char *elfcore_write_s390_ctrs
2233 (bfd *, char *, int *, const void *, int);
2234 extern char *elfcore_write_s390_prefix
2235 (bfd *, char *, int *, const void *, int);
2236 extern char *elfcore_write_arm_vfp
2237 (bfd *, char *, int *, const void *, int);
2238 extern char *elfcore_write_lwpstatus
2239 (bfd *, char *, int *, long, int, const void *);
2240 extern char *elfcore_write_register_note
2241 (bfd *, char *, int *, const char *, const void *, int);
2243 extern bfd *_bfd_elf32_bfd_from_remote_memory
2244 (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep,
2245 int (*target_read_memory) (bfd_vma, bfd_byte *, int));
2246 extern bfd *_bfd_elf64_bfd_from_remote_memory
2247 (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep,
2248 int (*target_read_memory) (bfd_vma, bfd_byte *, int));
2250 extern bfd_vma bfd_elf_obj_attr_size (bfd *);
2251 extern void bfd_elf_set_obj_attr_contents (bfd *, bfd_byte *, bfd_vma);
2252 extern int bfd_elf_get_obj_attr_int (bfd *, int, int);
2253 extern void bfd_elf_add_obj_attr_int (bfd *, int, int, unsigned int);
2254 #define bfd_elf_add_proc_attr_int(BFD, TAG, VALUE) \
2255 bfd_elf_add_obj_attr_int ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2256 extern void bfd_elf_add_obj_attr_string (bfd *, int, int, const char *);
2257 #define bfd_elf_add_proc_attr_string(BFD, TAG, VALUE) \
2258 bfd_elf_add_obj_attr_string ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2259 extern void bfd_elf_add_obj_attr_int_string (bfd *, int, int, unsigned int,
2261 #define bfd_elf_add_proc_attr_int_string(BFD, TAG, INTVAL, STRVAL) \
2262 bfd_elf_add_obj_attr_int_string ((BFD), OBJ_ATTR_PROC, (TAG), \
2265 extern char *_bfd_elf_attr_strdup (bfd *, const char *);
2266 extern void _bfd_elf_copy_obj_attributes (bfd *, bfd *);
2267 extern int _bfd_elf_obj_attrs_arg_type (bfd *, int, int);
2268 extern void _bfd_elf_parse_attributes (bfd *, Elf_Internal_Shdr *);
2269 extern bfd_boolean _bfd_elf_merge_object_attributes (bfd *, bfd *);
2270 extern bfd_boolean _bfd_elf_merge_unknown_attribute_low (bfd *, bfd *, int);
2271 extern bfd_boolean _bfd_elf_merge_unknown_attribute_list (bfd *, bfd *);
2272 extern Elf_Internal_Shdr *_bfd_elf_single_rel_hdr (asection *sec);
2274 /* The linker may need to keep track of the number of relocs that it
2275 decides to copy as dynamic relocs in check_relocs for each symbol.
2276 This is so that it can later discard them if they are found to be
2277 unnecessary. We can store the information in a field extending the
2278 regular ELF linker hash table. */
2280 struct elf_dyn_relocs
2282 struct elf_dyn_relocs *next;
2284 /* The input section of the reloc. */
2287 /* Total number of relocs copied for the input section. */
2288 bfd_size_type count;
2290 /* Number of pc-relative relocs copied for the input section. */
2291 bfd_size_type pc_count;
2294 extern bfd_boolean _bfd_elf_create_ifunc_sections
2295 (bfd *, struct bfd_link_info *);
2296 extern asection * _bfd_elf_create_ifunc_dyn_reloc
2297 (bfd *, struct bfd_link_info *, asection *sec, asection *sreloc,
2298 struct elf_dyn_relocs **);
2299 extern bfd_boolean _bfd_elf_allocate_ifunc_dyn_relocs
2300 (struct bfd_link_info *, struct elf_link_hash_entry *,
2301 struct elf_dyn_relocs **, unsigned int, unsigned int);
2303 extern void elf_append_rela (bfd *, asection *, Elf_Internal_Rela *);
2304 extern void elf_append_rel (bfd *, asection *, Elf_Internal_Rela *);
2306 extern bfd_vma elf64_r_info (bfd_vma, bfd_vma);
2307 extern bfd_vma elf64_r_sym (bfd_vma);
2308 extern bfd_vma elf32_r_info (bfd_vma, bfd_vma);
2309 extern bfd_vma elf32_r_sym (bfd_vma);
2311 /* Large common section. */
2312 extern asection _bfd_elf_large_com_section;
2314 /* Hash for local symbol with the first section id, ID, in the input
2315 file and the local symbol index, SYM. */
2316 #define ELF_LOCAL_SYMBOL_HASH(ID, SYM) \
2317 (((((ID) & 0xff) << 24) | (((ID) & 0xff00) << 8)) \
2318 ^ (SYM) ^ ((ID) >> 16))
2320 /* This is the condition under which finish_dynamic_symbol will be called.
2321 If our finish_dynamic_symbol isn't called, we'll need to do something
2322 about initializing any .plt and .got entries in relocate_section. */
2323 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
2325 && ((SHARED) || !(H)->forced_local) \
2326 && ((H)->dynindx != -1 || (H)->forced_local))
2328 /* This macro is to avoid lots of duplicated code in the body
2329 of xxx_relocate_section() in the various elfxx-xxxx.c files. */
2330 #define RELOC_FOR_GLOBAL_SYMBOL(info, input_bfd, input_section, rel, \
2331 r_symndx, symtab_hdr, sym_hashes, \
2332 h, sec, relocation, \
2333 unresolved_reloc, warned) \
2336 /* It seems this can happen with erroneous or unsupported \
2337 input (mixing a.out and elf in an archive, for example.) */ \
2338 if (sym_hashes == NULL) \
2341 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; \
2343 while (h->root.type == bfd_link_hash_indirect \
2344 || h->root.type == bfd_link_hash_warning) \
2345 h = (struct elf_link_hash_entry *) h->root.u.i.link; \
2348 unresolved_reloc = FALSE; \
2350 if (h->root.type == bfd_link_hash_defined \
2351 || h->root.type == bfd_link_hash_defweak) \
2353 sec = h->root.u.def.section; \
2355 || sec->output_section == NULL) \
2356 /* Set a flag that will be cleared later if we find a \
2357 relocation value for this symbol. output_section \
2358 is typically NULL for symbols satisfied by a shared \
2360 unresolved_reloc = TRUE; \
2362 relocation = (h->root.u.def.value \
2363 + sec->output_section->vma \
2364 + sec->output_offset); \
2366 else if (h->root.type == bfd_link_hash_undefweak) \
2368 else if (info->unresolved_syms_in_objects == RM_IGNORE \
2369 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) \
2371 else if (!info->relocatable) \
2374 err = (info->unresolved_syms_in_objects == RM_GENERATE_ERROR \
2375 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT); \
2376 if (!info->callbacks->undefined_symbol (info, \
2377 h->root.root.string, \
2380 rel->r_offset, err)) \
2384 (void) unresolved_reloc; \
2389 /* This macro is to avoid lots of duplicated code in the body of the
2390 loop over relocations in xxx_relocate_section() in the various
2393 Handle relocations against symbols from removed linkonce sections,
2394 or sections discarded by a linker script. When doing a relocatable
2395 link, we remove such relocations. Otherwise, we just want the
2396 section contents zeroed and avoid any special processing. */
2397 #define RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
2398 rel, relend, howto, contents) \
2400 _bfd_clear_contents (howto, input_bfd, input_section, \
2401 contents + rel->r_offset); \
2403 if (info->relocatable \
2404 && (input_section->flags & SEC_DEBUGGING)) \
2406 /* Only remove relocations in debug sections since other \
2407 sections may require relocations. */ \
2408 Elf_Internal_Shdr *rel_hdr; \
2410 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
2412 /* Avoid empty output section. */ \
2413 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
2415 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
2416 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
2417 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
2419 memmove (rel, rel + 1, (relend - rel - 1) * sizeof (*rel)); \
2421 input_section->reloc_count--; \
2429 rel->r_addend = 0; \
2433 /* Will a symbol be bound to the the definition within the shared
2434 library, if any. A unique symbol can never be bound locally. */
2435 #define SYMBOLIC_BIND(INFO, H) \
2436 (!(H)->unique_global \
2437 && ((INFO)->symbolic || ((INFO)->dynamic && !(H)->dynamic)))
2439 #endif /* _LIBELF_H_ */