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, 2012
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 /* Architecture-specific data for this backend.
718 This is actually a pointer to some type like struct elf_ARCH_data. */
719 const void *arch_data;
721 /* A function to translate an ELF RELA relocation to a BFD arelent
723 void (*elf_info_to_howto)
724 (bfd *, arelent *, Elf_Internal_Rela *);
726 /* A function to translate an ELF REL relocation to a BFD arelent
728 void (*elf_info_to_howto_rel)
729 (bfd *, arelent *, Elf_Internal_Rela *);
731 /* A function to determine whether a symbol is global when
732 partitioning the symbol table into local and global symbols.
733 This should be NULL for most targets, in which case the correct
734 thing will be done. MIPS ELF, at least on the Irix 5, has
735 special requirements. */
736 bfd_boolean (*elf_backend_sym_is_global)
739 /* The remaining functions are hooks which are called only if they
742 /* A function to permit a backend specific check on whether a
743 particular BFD format is relevant for an object file, and to
744 permit the backend to set any global information it wishes. When
745 this is called elf_elfheader is set, but anything else should be
746 used with caution. If this returns FALSE, the check_format
747 routine will return a bfd_error_wrong_format error. */
748 bfd_boolean (*elf_backend_object_p)
751 /* A function to do additional symbol processing when reading the
752 ELF symbol table. This is where any processor-specific special
753 section indices are handled. */
754 void (*elf_backend_symbol_processing)
757 /* A function to do additional symbol processing after reading the
758 entire ELF symbol table. */
759 bfd_boolean (*elf_backend_symbol_table_processing)
760 (bfd *, elf_symbol_type *, unsigned int);
762 /* A function to set the type of the info field. Processor-specific
763 types should be handled here. */
764 int (*elf_backend_get_symbol_type)
765 (Elf_Internal_Sym *, int);
767 /* A function to return the linker hash table entry of a symbol that
768 might be satisfied by an archive symbol. */
769 struct elf_link_hash_entry * (*elf_backend_archive_symbol_lookup)
770 (bfd *, struct bfd_link_info *, const char *);
772 /* Return true if local section symbols should have a non-null st_name.
773 NULL implies false. */
774 bfd_boolean (*elf_backend_name_local_section_symbols)
777 /* A function to do additional processing on the ELF section header
778 just before writing it out. This is used to set the flags and
779 type fields for some sections, or to actually write out data for
781 bfd_boolean (*elf_backend_section_processing)
782 (bfd *, Elf_Internal_Shdr *);
784 /* A function to handle unusual section types when creating BFD
785 sections from ELF sections. */
786 bfd_boolean (*elf_backend_section_from_shdr)
787 (bfd *, Elf_Internal_Shdr *, const char *, int);
789 /* A function to convert machine dependent ELF section header flags to
790 BFD internal section header flags. */
791 bfd_boolean (*elf_backend_section_flags)
792 (flagword *, const Elf_Internal_Shdr *);
794 /* A function that returns a struct containing ELF section flags and
795 type for the given BFD section. */
796 const struct bfd_elf_special_section * (*get_sec_type_attr)
799 /* A function to handle unusual program segment types when creating BFD
800 sections from ELF program segments. */
801 bfd_boolean (*elf_backend_section_from_phdr)
802 (bfd *, Elf_Internal_Phdr *, int, const char *);
804 /* A function to set up the ELF section header for a BFD section in
805 preparation for writing it out. This is where the flags and type
806 fields are set for unusual sections. */
807 bfd_boolean (*elf_backend_fake_sections)
808 (bfd *, Elf_Internal_Shdr *, asection *);
810 /* A function to get the ELF section index for a BFD section. If
811 this returns TRUE, the section was found. If it is a normal ELF
812 section, *RETVAL should be left unchanged. If it is not a normal
813 ELF section *RETVAL should be set to the SHN_xxxx index. */
814 bfd_boolean (*elf_backend_section_from_bfd_section)
815 (bfd *, asection *, int *retval);
817 /* If this field is not NULL, it is called by the add_symbols phase
818 of a link just before adding a symbol to the global linker hash
819 table. It may modify any of the fields as it wishes. If *NAME
820 is set to NULL, the symbol will be skipped rather than being
821 added to the hash table. This function is responsible for
822 handling all processor dependent symbol bindings and section
823 indices, and must set at least *FLAGS and *SEC for each processor
824 dependent case; failure to do so will cause a link error. */
825 bfd_boolean (*elf_add_symbol_hook)
826 (bfd *abfd, struct bfd_link_info *info, Elf_Internal_Sym *,
827 const char **name, flagword *flags, asection **sec, bfd_vma *value);
829 /* If this field is not NULL, it is called by the elf_link_output_sym
830 phase of a link for each symbol which will appear in the object file.
831 On error, this function returns 0. 1 is returned when the symbol
832 should be output, 2 is returned when the symbol should be discarded. */
833 int (*elf_backend_link_output_symbol_hook)
834 (struct bfd_link_info *info, const char *, Elf_Internal_Sym *,
835 asection *, struct elf_link_hash_entry *);
837 /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend
838 linker the first time it encounters a dynamic object in the link.
839 This function must create any sections required for dynamic
840 linking. The ABFD argument is a dynamic object. The .interp,
841 .dynamic, .dynsym, .dynstr, and .hash functions have already been
842 created, and this function may modify the section flags if
843 desired. This function will normally create the .got and .plt
844 sections, but different backends have different requirements. */
845 bfd_boolean (*elf_backend_create_dynamic_sections)
846 (bfd *abfd, struct bfd_link_info *info);
848 /* When creating a shared library, determine whether to omit the
849 dynamic symbol for the section. */
850 bfd_boolean (*elf_backend_omit_section_dynsym)
851 (bfd *output_bfd, struct bfd_link_info *info, asection *osec);
853 /* Return TRUE if relocations of targets are compatible to the extent
854 that CHECK_RELOCS will properly process them. PR 4424. */
855 bfd_boolean (*relocs_compatible) (const bfd_target *, const bfd_target *);
857 /* The CHECK_RELOCS function is called by the add_symbols phase of
858 the ELF backend linker. It is called once for each section with
859 relocs of an object file, just after the symbols for the object
860 file have been added to the global linker hash table. The
861 function must look through the relocs and do any special handling
862 required. This generally means allocating space in the global
863 offset table, and perhaps allocating space for a reloc. The
864 relocs are always passed as Rela structures; if the section
865 actually uses Rel structures, the r_addend field will always be
867 bfd_boolean (*check_relocs)
868 (bfd *abfd, struct bfd_link_info *info, asection *o,
869 const Elf_Internal_Rela *relocs);
871 /* The CHECK_DIRECTIVES function is called once per input file by
872 the add_symbols phase of the ELF backend linker. The function
873 must inspect the bfd and create any additional symbols according
874 to any custom directives in the bfd. */
875 bfd_boolean (*check_directives)
876 (bfd *abfd, struct bfd_link_info *info);
878 /* The AS_NEEDED_CLEANUP function is called once per --as-needed
879 input file that was not needed by the add_symbols phase of the
880 ELF backend linker. The function must undo any target specific
881 changes in the symbol hash table. */
882 bfd_boolean (*as_needed_cleanup)
883 (bfd *abfd, struct bfd_link_info *info);
885 /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
886 linker for every symbol which is defined by a dynamic object and
887 referenced by a regular object. This is called after all the
888 input files have been seen, but before the SIZE_DYNAMIC_SECTIONS
889 function has been called. The hash table entry should be
890 bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be
891 defined in a section from a dynamic object. Dynamic object
892 sections are not included in the final link, and this function is
893 responsible for changing the value to something which the rest of
894 the link can deal with. This will normally involve adding an
895 entry to the .plt or .got or some such section, and setting the
896 symbol to point to that. */
897 bfd_boolean (*elf_backend_adjust_dynamic_symbol)
898 (struct bfd_link_info *info, struct elf_link_hash_entry *h);
900 /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker
901 after all the linker input files have been seen but before the
902 section sizes have been set. This is called after
903 ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS. */
904 bfd_boolean (*elf_backend_always_size_sections)
905 (bfd *output_bfd, struct bfd_link_info *info);
907 /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend
908 linker after all the linker input files have been seen but before
909 the sections sizes have been set. This is called after
910 ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols.
911 It is only called when linking against a dynamic object. It must
912 set the sizes of the dynamic sections, and may fill in their
913 contents as well. The generic ELF linker can handle the .dynsym,
914 .dynstr and .hash sections. This function must handle the
915 .interp section and any sections created by the
916 CREATE_DYNAMIC_SECTIONS entry point. */
917 bfd_boolean (*elf_backend_size_dynamic_sections)
918 (bfd *output_bfd, struct bfd_link_info *info);
920 /* Set TEXT_INDEX_SECTION and DATA_INDEX_SECTION, the output sections
921 we keep to use as a base for relocs and symbols. */
922 void (*elf_backend_init_index_section)
923 (bfd *output_bfd, struct bfd_link_info *info);
925 /* The RELOCATE_SECTION function is called by the ELF backend linker
926 to handle the relocations for a section.
928 The relocs are always passed as Rela structures; if the section
929 actually uses Rel structures, the r_addend field will always be
932 This function is responsible for adjust the section contents as
933 necessary, and (if using Rela relocs and generating a
934 relocatable output file) adjusting the reloc addend as
937 This function does not have to worry about setting the reloc
938 address or the reloc symbol index.
940 LOCAL_SYMS is a pointer to the swapped in local symbols.
942 LOCAL_SECTIONS is an array giving the section in the input file
943 corresponding to the st_shndx field of each local symbol.
945 The global hash table entry for the global symbols can be found
946 via elf_sym_hashes (input_bfd).
948 When generating relocatable output, this function must handle
949 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
950 going to be the section symbol corresponding to the output
951 section, which means that the addend must be adjusted
954 Returns FALSE on error, TRUE on success, 2 if successful and
955 relocations should be written for this section. */
956 int (*elf_backend_relocate_section)
957 (bfd *output_bfd, struct bfd_link_info *info, bfd *input_bfd,
958 asection *input_section, bfd_byte *contents, Elf_Internal_Rela *relocs,
959 Elf_Internal_Sym *local_syms, asection **local_sections);
961 /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend
962 linker just before it writes a symbol out to the .dynsym section.
963 The processor backend may make any required adjustment to the
964 symbol. It may also take the opportunity to set contents of the
965 dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on
966 all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called
967 on those symbols which are defined by a dynamic object. */
968 bfd_boolean (*elf_backend_finish_dynamic_symbol)
969 (bfd *output_bfd, struct bfd_link_info *info,
970 struct elf_link_hash_entry *h, Elf_Internal_Sym *sym);
972 /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend
973 linker just before it writes all the dynamic sections out to the
974 output file. The FINISH_DYNAMIC_SYMBOL will have been called on
975 all dynamic symbols. */
976 bfd_boolean (*elf_backend_finish_dynamic_sections)
977 (bfd *output_bfd, struct bfd_link_info *info);
979 /* A function to do any beginning processing needed for the ELF file
980 before building the ELF headers and computing file positions. */
981 void (*elf_backend_begin_write_processing)
982 (bfd *, struct bfd_link_info *);
984 /* A function to do any final processing needed for the ELF file
985 before writing it out. The LINKER argument is TRUE if this BFD
986 was created by the ELF backend linker. */
987 void (*elf_backend_final_write_processing)
988 (bfd *, bfd_boolean linker);
990 /* This function is called by get_program_header_size. It should
991 return the number of additional program segments which this BFD
992 will need. It should return -1 on error. */
993 int (*elf_backend_additional_program_headers)
994 (bfd *, struct bfd_link_info *);
996 /* This function is called to modify an existing segment map in a
997 backend specific fashion. */
998 bfd_boolean (*elf_backend_modify_segment_map)
999 (bfd *, struct bfd_link_info *);
1001 /* This function is called to modify program headers just before
1002 they are written. */
1003 bfd_boolean (*elf_backend_modify_program_headers)
1004 (bfd *, struct bfd_link_info *);
1006 /* This function is called before section garbage collection to
1007 mark entry symbol sections. */
1009 (struct bfd_link_info *);
1011 /* This function is called during section garbage collection to
1012 mark sections that define global symbols. */
1013 bfd_boolean (*gc_mark_dynamic_ref)
1014 (struct elf_link_hash_entry *, void *);
1016 /* This function is called during section gc to discover the section a
1017 particular relocation refers to. */
1018 elf_gc_mark_hook_fn gc_mark_hook;
1020 /* This function, if defined, is called after the first gc marking pass
1021 to allow the backend to mark additional sections. */
1022 bfd_boolean (*gc_mark_extra_sections)
1023 (struct bfd_link_info *, elf_gc_mark_hook_fn);
1025 /* This function, if defined, is called during the sweep phase of gc
1026 in order that a backend might update any data structures it might
1028 bfd_boolean (*gc_sweep_hook)
1029 (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *);
1031 /* This function, if defined, is called after the ELF headers have
1032 been created. This allows for things like the OS and ABI versions
1034 void (*elf_backend_post_process_headers)
1035 (bfd *, struct bfd_link_info *);
1037 /* This function, if defined, prints a symbol to file and returns the
1038 name of the symbol to be printed. It should return NULL to fall
1039 back to default symbol printing. */
1040 const char *(*elf_backend_print_symbol_all)
1041 (bfd *, void *, asymbol *);
1043 /* This function, if defined, is called after all local symbols and
1044 global symbols converted to locals are emitted into the symtab
1045 section. It allows the backend to emit special local symbols
1046 not handled in the hash table. */
1047 bfd_boolean (*elf_backend_output_arch_local_syms)
1048 (bfd *, struct bfd_link_info *, void *,
1049 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym *, asection *,
1050 struct elf_link_hash_entry *));
1052 /* This function, if defined, is called after all symbols are emitted
1053 into the symtab section. It allows the backend to emit special
1054 global symbols not handled in the hash table. */
1055 bfd_boolean (*elf_backend_output_arch_syms)
1056 (bfd *, struct bfd_link_info *, void *,
1057 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym *, asection *,
1058 struct elf_link_hash_entry *));
1060 /* Copy any information related to dynamic linking from a pre-existing
1061 symbol to a newly created symbol. Also called to copy flags and
1062 other back-end info to a weakdef, in which case the symbol is not
1063 newly created and plt/got refcounts and dynamic indices should not
1065 void (*elf_backend_copy_indirect_symbol)
1066 (struct bfd_link_info *, struct elf_link_hash_entry *,
1067 struct elf_link_hash_entry *);
1069 /* Modify any information related to dynamic linking such that the
1070 symbol is not exported. */
1071 void (*elf_backend_hide_symbol)
1072 (struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean);
1074 /* A function to do additional symbol fixup, called by
1075 _bfd_elf_fix_symbol_flags. */
1076 bfd_boolean (*elf_backend_fixup_symbol)
1077 (struct bfd_link_info *, struct elf_link_hash_entry *);
1079 /* Merge the backend specific symbol attribute. */
1080 void (*elf_backend_merge_symbol_attribute)
1081 (struct elf_link_hash_entry *, const Elf_Internal_Sym *, bfd_boolean,
1084 /* This function, if defined, will return a string containing the
1085 name of a target-specific dynamic tag. */
1086 char *(*elf_backend_get_target_dtag)
1089 /* Decide whether an undefined symbol is special and can be ignored.
1090 This is the case for OPTIONAL symbols on IRIX. */
1091 bfd_boolean (*elf_backend_ignore_undef_symbol)
1092 (struct elf_link_hash_entry *);
1094 /* Emit relocations. Overrides default routine for emitting relocs,
1095 except during a relocatable link, or if all relocs are being emitted. */
1096 bfd_boolean (*elf_backend_emit_relocs)
1097 (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *,
1098 struct elf_link_hash_entry **);
1100 /* Count relocations. Not called for relocatable links
1101 or if all relocs are being preserved in the output. */
1102 unsigned int (*elf_backend_count_relocs)
1103 (struct bfd_link_info *, asection *);
1105 /* This function, if defined, is called when an NT_PRSTATUS note is found
1107 bfd_boolean (*elf_backend_grok_prstatus)
1108 (bfd *, Elf_Internal_Note *);
1110 /* This function, if defined, is called when an NT_PSINFO or NT_PRPSINFO
1111 note is found in a core file. */
1112 bfd_boolean (*elf_backend_grok_psinfo)
1113 (bfd *, Elf_Internal_Note *);
1115 /* This function, if defined, is called to write a note to a corefile. */
1116 char *(*elf_backend_write_core_note)
1117 (bfd *abfd, char *buf, int *bufsiz, int note_type, ...);
1119 /* This function, if defined, is called to convert target-specific
1120 section flag names into hex values. */
1121 flagword (*elf_backend_lookup_section_flags_hook)
1124 /* This function returns class of a reloc type. */
1125 enum elf_reloc_type_class (*elf_backend_reloc_type_class)
1126 (const Elf_Internal_Rela *);
1128 /* This function, if defined, removes information about discarded functions
1129 from other sections which mention them. */
1130 bfd_boolean (*elf_backend_discard_info)
1131 (bfd *, struct elf_reloc_cookie *, struct bfd_link_info *);
1133 /* This function, if defined, signals that the function above has removed
1134 the discarded relocations for this section. */
1135 bfd_boolean (*elf_backend_ignore_discarded_relocs)
1138 /* What to do when ld finds relocations against symbols defined in
1139 discarded sections. */
1140 unsigned int (*action_discarded)
1143 /* This function returns the width of FDE pointers in bytes, or 0 if
1144 that can't be determined for some reason. The default definition
1145 goes by the bfd's EI_CLASS. */
1146 unsigned int (*elf_backend_eh_frame_address_size)
1147 (bfd *, asection *);
1149 /* These functions tell elf-eh-frame whether to attempt to turn
1150 absolute or lsda encodings into pc-relative ones. The default
1151 definition enables these transformations. */
1152 bfd_boolean (*elf_backend_can_make_relative_eh_frame)
1153 (bfd *, struct bfd_link_info *, asection *);
1154 bfd_boolean (*elf_backend_can_make_lsda_relative_eh_frame)
1155 (bfd *, struct bfd_link_info *, asection *);
1157 /* This function returns an encoding after computing the encoded
1158 value (and storing it in ENCODED) for the given OFFSET into OSEC,
1159 to be stored in at LOC_OFFSET into the LOC_SEC input section.
1160 The default definition chooses a 32-bit PC-relative encoding. */
1161 bfd_byte (*elf_backend_encode_eh_address)
1162 (bfd *abfd, struct bfd_link_info *info,
1163 asection *osec, bfd_vma offset,
1164 asection *loc_sec, bfd_vma loc_offset,
1167 /* This function, if defined, may write out the given section.
1168 Returns TRUE if it did so and FALSE if the caller should. */
1169 bfd_boolean (*elf_backend_write_section)
1170 (bfd *, struct bfd_link_info *, asection *, bfd_byte *);
1172 /* The level of IRIX compatibility we're striving for.
1173 MIPS ELF specific function. */
1174 irix_compat_t (*elf_backend_mips_irix_compat)
1177 reloc_howto_type *(*elf_backend_mips_rtype_to_howto)
1178 (unsigned int, bfd_boolean);
1180 /* The swapping table to use when dealing with ECOFF information.
1181 Used for the MIPS ELF .mdebug section. */
1182 const struct ecoff_debug_swap *elf_backend_ecoff_debug_swap;
1184 /* This function implements `bfd_elf_bfd_from_remote_memory';
1185 see elf.c, elfcode.h. */
1186 bfd *(*elf_backend_bfd_from_remote_memory)
1187 (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep,
1188 int (*target_read_memory) (bfd_vma vma, bfd_byte *myaddr, int len));
1190 /* This function is used by `_bfd_elf_get_synthetic_symtab';
1192 bfd_vma (*plt_sym_val) (bfd_vma, const asection *, const arelent *);
1194 /* Is symbol defined in common section? */
1195 bfd_boolean (*common_definition) (Elf_Internal_Sym *);
1197 /* Return a common section index for section. */
1198 unsigned int (*common_section_index) (asection *);
1200 /* Return a common section for section. */
1201 asection *(*common_section) (asection *);
1203 /* Return TRUE if we can merge 2 definitions. */
1204 bfd_boolean (*merge_symbol) (struct bfd_link_info *,
1205 struct elf_link_hash_entry **,
1206 struct elf_link_hash_entry *,
1207 Elf_Internal_Sym *, asection **,
1208 bfd_vma *, unsigned int *,
1209 bfd_boolean *, bfd_boolean *,
1210 bfd_boolean *, bfd_boolean *,
1211 bfd_boolean *, bfd_boolean *,
1212 bfd_boolean *, bfd_boolean *,
1214 bfd_boolean *, bfd_boolean *,
1215 bfd_boolean *, bfd_boolean *,
1216 bfd *, asection **);
1218 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
1219 bfd_boolean (*elf_hash_symbol) (struct elf_link_hash_entry *);
1221 /* Return TRUE if type is a function symbol type. */
1222 bfd_boolean (*is_function_type) (unsigned int type);
1224 /* Return TRUE if symbol may be a function. Set *CODE_SEC and *CODE_VAL
1225 to the function's entry point. */
1226 bfd_boolean (*maybe_function_sym) (const asymbol *sym,
1227 asection **code_sec, bfd_vma *code_off);
1229 /* Used to handle bad SHF_LINK_ORDER input. */
1230 bfd_error_handler_type link_order_error_handler;
1232 /* Name of the PLT relocation section. */
1233 const char *relplt_name;
1235 /* Alternate EM_xxxx machine codes for this backend. */
1236 int elf_machine_alt1;
1237 int elf_machine_alt2;
1239 const struct elf_size_info *s;
1241 /* An array of target specific special sections. */
1242 const struct bfd_elf_special_section *special_sections;
1244 /* The size in bytes of the header for the GOT. This includes the
1245 so-called reserved entries on some systems. */
1246 bfd_vma got_header_size;
1248 /* The size of the GOT entry for the symbol pointed to by H if non-NULL,
1249 otherwise by the local symbol with index SYMNDX in IBFD. */
1250 bfd_vma (*got_elt_size) (bfd *, struct bfd_link_info *,
1251 struct elf_link_hash_entry *h,
1252 bfd *ibfd, unsigned long symndx);
1254 /* The vendor name to use for a processor-standard attributes section. */
1255 const char *obj_attrs_vendor;
1257 /* The section name to use for a processor-standard attributes section. */
1258 const char *obj_attrs_section;
1260 /* Return 1, 2 or 3 to indicate what type of arguments a
1261 processor-specific tag takes. */
1262 int (*obj_attrs_arg_type) (int);
1264 /* The section type to use for an attributes section. */
1265 unsigned int obj_attrs_section_type;
1267 /* This function determines the order in which any attributes are
1268 written. It must be defined for input in the range
1269 LEAST_KNOWN_OBJ_ATTRIBUTE..NUM_KNOWN_OBJ_ATTRIBUTES-1 (this range
1270 is used in order to make unity easy). The returned value is the
1271 actual tag number to place in the input position. */
1272 int (*obj_attrs_order) (int);
1274 /* Handle merging unknown attributes; either warn and return TRUE,
1275 or give an error and return FALSE. */
1276 bfd_boolean (*obj_attrs_handle_unknown) (bfd *, int);
1278 /* This is non-zero if static TLS segments require a special alignment. */
1279 unsigned static_tls_alignment;
1281 /* This is TRUE if the linker should act like collect and gather
1282 global constructors and destructors by name. This is TRUE for
1283 MIPS ELF because the Irix 5 tools can not handle the .init
1285 unsigned collect : 1;
1287 /* This is TRUE if the linker should ignore changes to the type of a
1288 symbol. This is TRUE for MIPS ELF because some Irix 5 objects
1289 record undefined functions as STT_OBJECT although the definitions
1291 unsigned type_change_ok : 1;
1293 /* Whether the backend may use REL relocations. (Some backends use
1294 both REL and RELA relocations, and this flag is set for those
1296 unsigned may_use_rel_p : 1;
1298 /* Whether the backend may use RELA relocations. (Some backends use
1299 both REL and RELA relocations, and this flag is set for those
1301 unsigned may_use_rela_p : 1;
1303 /* Whether the default relocation type is RELA. If a backend with
1304 this flag set wants REL relocations for a particular section,
1305 it must note that explicitly. Similarly, if this flag is clear,
1306 and the backend wants RELA relocations for a particular
1308 unsigned default_use_rela_p : 1;
1310 /* True if PLT and copy relocations should be RELA by default. */
1311 unsigned rela_plts_and_copies_p : 1;
1313 /* Set if RELA relocations for a relocatable link can be handled by
1314 generic code. Backends that set this flag need do nothing in the
1315 backend relocate_section routine for relocatable linking. */
1316 unsigned rela_normal : 1;
1318 /* TRUE if addresses "naturally" sign extend. This is used when
1319 swapping in from Elf32 when BFD64. */
1320 unsigned sign_extend_vma : 1;
1322 unsigned want_got_plt : 1;
1323 unsigned plt_readonly : 1;
1324 unsigned want_plt_sym : 1;
1325 unsigned plt_not_loaded : 1;
1326 unsigned plt_alignment : 4;
1327 unsigned can_gc_sections : 1;
1328 unsigned can_refcount : 1;
1329 unsigned want_got_sym : 1;
1330 unsigned want_dynbss : 1;
1332 /* Targets which do not support physical addressing often require
1333 that the p_paddr field in the section header to be set to zero.
1334 This field indicates whether this behavior is required. */
1335 unsigned want_p_paddr_set_to_zero : 1;
1337 /* True if an object file lacking a .note.GNU-stack section
1338 should be assumed to be requesting exec stack. At least one
1339 other file in the link needs to have a .note.GNU-stack section
1340 for a PT_GNU_STACK segment to be created. */
1341 unsigned default_execstack : 1;
1344 /* Information about reloc sections associated with a bfd_elf_section_data
1346 struct bfd_elf_section_reloc_data
1348 /* The ELF header for the reloc section associated with this
1350 Elf_Internal_Shdr *hdr;
1351 /* The number of relocations currently assigned to HDR. */
1353 /* The ELF section number of the reloc section. Only used for an
1356 /* Used by the backend linker to store the symbol hash table entries
1357 associated with relocs against global symbols. */
1358 struct elf_link_hash_entry **hashes;
1361 /* Information stored for each BFD section in an ELF file. This
1362 structure is allocated by elf_new_section_hook. */
1364 struct bfd_elf_section_data
1366 /* The ELF header for this section. */
1367 Elf_Internal_Shdr this_hdr;
1369 /* Information about the REL and RELA reloc sections associated
1370 with this section, if any. */
1371 struct bfd_elf_section_reloc_data rel, rela;
1373 /* The ELF section number of this section. */
1376 /* Used by the backend linker when generating a shared library to
1377 record the dynamic symbol index for a section symbol
1378 corresponding to this section. A value of 0 means that there is
1379 no dynamic symbol for this section. */
1382 /* A pointer to the linked-to section for SHF_LINK_ORDER. */
1383 asection *linked_to;
1385 /* A pointer to the swapped relocs. If the section uses REL relocs,
1386 rather than RELA, all the r_addend fields will be zero. This
1387 pointer may be NULL. It is used by the backend linker. */
1388 Elf_Internal_Rela *relocs;
1390 /* A pointer to a linked list tracking dynamic relocs copied for
1394 /* A pointer to the bfd section used for dynamic relocs. */
1398 /* Group name, if this section is a member of a group. */
1401 /* Group signature sym, if this is the SHT_GROUP section. */
1402 struct bfd_symbol *id;
1405 /* For a member of a group, points to the SHT_GROUP section.
1406 NULL for the SHT_GROUP section itself and non-group sections. */
1407 asection *sec_group;
1409 /* A linked list of member sections in the group. Circular when used by
1410 the linker. For the SHT_GROUP section, points at first member. */
1411 asection *next_in_group;
1413 /* The FDEs associated with this section. The u.fde.next_in_section
1414 field acts as a chain pointer. */
1415 struct eh_cie_fde *fde_list;
1417 /* A pointer used for various section optimizations. */
1421 #define elf_section_data(sec) ((struct bfd_elf_section_data*)(sec)->used_by_bfd)
1422 #define elf_linked_to_section(sec) (elf_section_data(sec)->linked_to)
1423 #define elf_section_type(sec) (elf_section_data(sec)->this_hdr.sh_type)
1424 #define elf_section_flags(sec) (elf_section_data(sec)->this_hdr.sh_flags)
1425 #define elf_group_name(sec) (elf_section_data(sec)->group.name)
1426 #define elf_group_id(sec) (elf_section_data(sec)->group.id)
1427 #define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group)
1428 #define elf_fde_list(sec) (elf_section_data(sec)->fde_list)
1429 #define elf_sec_group(sec) (elf_section_data(sec)->sec_group)
1431 #define xvec_get_elf_backend_data(xvec) \
1432 ((const struct elf_backend_data *) (xvec)->backend_data)
1434 #define get_elf_backend_data(abfd) \
1435 xvec_get_elf_backend_data ((abfd)->xvec)
1437 /* The least object attributes (within an attributes subsection) known
1438 for any target. Some code assumes that the value 0 is not used and
1439 the field for that attribute can instead be used as a marker to
1440 indicate that attributes have been initialized. */
1441 #define LEAST_KNOWN_OBJ_ATTRIBUTE 2
1443 /* The maximum number of known object attributes for any target. */
1444 #define NUM_KNOWN_OBJ_ATTRIBUTES 71
1446 /* The value of an object attribute. The type indicates whether the attribute
1447 holds and integer, a string, or both. It can also indicate that there can
1448 be no default (i.e. all values must be written to file, even zero). */
1450 typedef struct obj_attribute
1452 #define ATTR_TYPE_FLAG_INT_VAL (1 << 0)
1453 #define ATTR_TYPE_FLAG_STR_VAL (1 << 1)
1454 #define ATTR_TYPE_FLAG_NO_DEFAULT (1 << 2)
1456 #define ATTR_TYPE_HAS_INT_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_INT_VAL)
1457 #define ATTR_TYPE_HAS_STR_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_STR_VAL)
1458 #define ATTR_TYPE_HAS_NO_DEFAULT(TYPE) ((TYPE) & ATTR_TYPE_FLAG_NO_DEFAULT)
1465 typedef struct obj_attribute_list
1467 struct obj_attribute_list *next;
1470 } obj_attribute_list;
1472 /* Object attributes may either be defined by the processor ABI, index
1473 OBJ_ATTR_PROC in the *_obj_attributes arrays, or be GNU-specific
1474 (and possibly also processor-specific), index OBJ_ATTR_GNU. */
1475 #define OBJ_ATTR_PROC 0
1476 #define OBJ_ATTR_GNU 1
1477 #define OBJ_ATTR_FIRST OBJ_ATTR_PROC
1478 #define OBJ_ATTR_LAST OBJ_ATTR_GNU
1480 /* The following object attribute tags are taken as generic, for all
1481 targets and for "gnu" where there is no target standard. */
1488 Tag_compatibility = 32
1491 /* The following struct stores information about every SystemTap section
1492 found in the object file. */
1495 struct sdt_note *next;
1500 /* Some private data is stashed away for future use using the tdata pointer
1501 in the bfd structure. */
1503 struct elf_obj_tdata
1505 Elf_Internal_Ehdr elf_header[1]; /* Actual data, but ref like ptr */
1506 Elf_Internal_Shdr **elf_sect_ptr;
1507 Elf_Internal_Phdr *phdr;
1508 struct elf_segment_map *segment_map;
1509 struct elf_strtab_hash *strtab_ptr;
1512 unsigned int num_elf_sections; /* elf_sect_ptr size */
1513 int num_section_syms;
1514 asymbol **section_syms; /* STT_SECTION symbols for each section */
1515 Elf_Internal_Shdr symtab_hdr;
1516 Elf_Internal_Shdr shstrtab_hdr;
1517 Elf_Internal_Shdr strtab_hdr;
1518 Elf_Internal_Shdr dynsymtab_hdr;
1519 Elf_Internal_Shdr dynstrtab_hdr;
1520 Elf_Internal_Shdr dynversym_hdr;
1521 Elf_Internal_Shdr dynverref_hdr;
1522 Elf_Internal_Shdr dynverdef_hdr;
1523 Elf_Internal_Shdr symtab_shndx_hdr;
1524 unsigned int symtab_section, shstrtab_section;
1525 unsigned int strtab_section, dynsymtab_section;
1526 unsigned int symtab_shndx_section;
1527 unsigned int dynversym_section, dynverdef_section, dynverref_section;
1528 file_ptr next_file_pos;
1529 bfd_vma gp; /* The gp value */
1530 unsigned int gp_size; /* The gp size */
1532 /* Information grabbed from an elf core file. */
1539 /* A mapping from external symbols to entries in the linker hash
1540 table, used when linking. This is indexed by the symbol index
1541 minus the sh_info field of the symbol table header. */
1542 struct elf_link_hash_entry **sym_hashes;
1544 /* Track usage and final offsets of GOT entries for local symbols.
1545 This array is indexed by symbol index. Elements are used
1546 identically to "got" in struct elf_link_hash_entry. */
1549 bfd_signed_vma *refcounts;
1551 struct got_entry **ents;
1554 /* The linker ELF emulation code needs to let the backend ELF linker
1555 know what filename should be used for a dynamic object if the
1556 dynamic object is found using a search. The emulation code then
1557 sometimes needs to know what name was actually used. Until the
1558 file has been added to the linker symbol table, this field holds
1559 the name the linker wants. After it has been added, it holds the
1560 name actually used, which will be the DT_SONAME entry if there is
1562 const char *dt_name;
1564 /* The linker emulation needs to know what audit libs
1565 are used by a dynamic object. */
1566 const char *dt_audit;
1568 /* Records the result of `get_program_header_size'. */
1569 bfd_size_type program_header_size;
1571 /* Used by find_nearest_line entry point. */
1574 /* Used by MIPS ELF find_nearest_line entry point. The structure
1575 could be included directly in this one, but there's no point to
1576 wasting the memory just for the infrequently called
1577 find_nearest_line. */
1578 struct mips_elf_find_line *find_line_info;
1580 /* A place to stash dwarf1 info for this bfd. */
1581 struct dwarf1_debug *dwarf1_find_line_info;
1583 /* A place to stash dwarf2 info for this bfd. */
1584 void *dwarf2_find_line_info;
1586 /* An array of stub sections indexed by symbol number, used by the
1587 MIPS ELF linker. FIXME: We should figure out some way to only
1588 include this field for a MIPS ELF target. */
1589 asection **local_stubs;
1590 asection **local_call_stubs;
1592 /* Used to determine if PT_GNU_EH_FRAME segment header should be
1594 asection *eh_frame_hdr;
1596 Elf_Internal_Shdr **group_sect_ptr;
1599 /* Number of symbol version definitions we are about to emit. */
1600 unsigned int cverdefs;
1602 /* Number of symbol version references we are about to emit. */
1603 unsigned int cverrefs;
1605 /* Segment flags for the PT_GNU_STACK segment. */
1606 unsigned int stack_flags;
1608 /* Symbol version definitions in external objects. */
1609 Elf_Internal_Verdef *verdef;
1611 /* Symbol version references to external objects. */
1612 Elf_Internal_Verneed *verref;
1614 /* The Irix 5 support uses two virtual sections, which represent
1615 text/data symbols defined in dynamic objects. */
1616 asymbol *elf_data_symbol;
1617 asymbol *elf_text_symbol;
1618 asection *elf_data_section;
1619 asection *elf_text_section;
1621 /* A pointer to the .eh_frame section. */
1622 asection *eh_frame_section;
1624 /* Whether a dyanmic object was specified normally on the linker
1625 command line, or was specified when --as-needed was in effect,
1626 or was found via a DT_NEEDED entry. */
1627 enum dynamic_lib_link_class dyn_lib_class;
1629 /* This is set to TRUE if the object was created by the backend
1633 /* Irix 5 often screws up the symbol table, sorting local symbols
1634 after global symbols. This flag is set if the symbol table in
1635 this BFD appears to be screwed up. If it is, we ignore the
1636 sh_info field in the symbol table header, and always read all the
1638 bfd_boolean bad_symtab;
1640 /* Used to determine if the e_flags field has been initialized */
1641 bfd_boolean flags_init;
1643 /* Symbol buffer. */
1646 obj_attribute known_obj_attributes[2][NUM_KNOWN_OBJ_ATTRIBUTES];
1647 obj_attribute_list *other_obj_attributes[2];
1649 /* Called at the end of _bfd_elf_write_object_contents if not NULL. */
1650 bfd_boolean (*after_write_object_contents) (bfd *);
1651 void *after_write_object_contents_info;
1653 /* NT_GNU_BUILD_ID note type. */
1654 bfd_size_type build_id_size;
1657 /* Linked-list containing information about every Systemtap section
1658 found in the object file. Each section corresponds to one entry
1660 struct sdt_note *sdt_note_head;
1662 /* True if the bfd contains symbols that have the STT_GNU_IFUNC
1663 symbol type or STB_GNU_UNIQUE binding. Used to set the osabi
1664 field in the ELF header structure. */
1665 bfd_boolean has_gnu_symbols;
1667 /* An identifier used to distinguish different target
1668 specific extensions to this structure. */
1669 enum elf_target_id object_id;
1672 #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
1674 #define elf_object_id(bfd) (elf_tdata(bfd) -> object_id)
1675 #define elf_program_header_size(bfd) (elf_tdata(bfd) -> program_header_size)
1676 #define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header)
1677 #define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr)
1678 #define elf_numsections(bfd) (elf_tdata(bfd) -> num_elf_sections)
1679 #define elf_shstrtab(bfd) (elf_tdata(bfd) -> strtab_ptr)
1680 #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section)
1681 #define elf_symtab_shndx(bfd) (elf_tdata(bfd) -> symtab_shndx_section)
1682 #define elf_symtab_hdr(bfd) (elf_tdata(bfd) -> symtab_hdr)
1683 #define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section)
1684 #define elf_dynversym(bfd) (elf_tdata(bfd) -> dynversym_section)
1685 #define elf_dynverdef(bfd) (elf_tdata(bfd) -> dynverdef_section)
1686 #define elf_dynverref(bfd) (elf_tdata(bfd) -> dynverref_section)
1687 #define elf_eh_frame_section(bfd) \
1688 (elf_tdata(bfd) -> eh_frame_section)
1689 #define elf_num_locals(bfd) (elf_tdata(bfd) -> num_locals)
1690 #define elf_num_globals(bfd) (elf_tdata(bfd) -> num_globals)
1691 #define elf_section_syms(bfd) (elf_tdata(bfd) -> section_syms)
1692 #define elf_num_section_syms(bfd) (elf_tdata(bfd) -> num_section_syms)
1693 #define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
1694 #define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
1695 #define elf_gp(bfd) (elf_tdata(bfd) -> gp)
1696 #define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size)
1697 #define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes)
1698 #define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts)
1699 #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets)
1700 #define elf_local_got_ents(bfd) (elf_tdata(bfd) -> local_got.ents)
1701 #define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name)
1702 #define elf_dt_audit(bfd) (elf_tdata(bfd) -> dt_audit)
1703 #define elf_dyn_lib_class(bfd) (elf_tdata(bfd) -> dyn_lib_class)
1704 #define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab)
1705 #define elf_flags_init(bfd) (elf_tdata(bfd) -> flags_init)
1706 #define elf_known_obj_attributes(bfd) (elf_tdata (bfd) -> known_obj_attributes)
1707 #define elf_other_obj_attributes(bfd) (elf_tdata (bfd) -> other_obj_attributes)
1708 #define elf_known_obj_attributes_proc(bfd) \
1709 (elf_known_obj_attributes (bfd) [OBJ_ATTR_PROC])
1710 #define elf_other_obj_attributes_proc(bfd) \
1711 (elf_other_obj_attributes (bfd) [OBJ_ATTR_PROC])
1713 extern void _bfd_elf_swap_verdef_in
1714 (bfd *, const Elf_External_Verdef *, Elf_Internal_Verdef *);
1715 extern void _bfd_elf_swap_verdef_out
1716 (bfd *, const Elf_Internal_Verdef *, Elf_External_Verdef *);
1717 extern void _bfd_elf_swap_verdaux_in
1718 (bfd *, const Elf_External_Verdaux *, Elf_Internal_Verdaux *);
1719 extern void _bfd_elf_swap_verdaux_out
1720 (bfd *, const Elf_Internal_Verdaux *, Elf_External_Verdaux *);
1721 extern void _bfd_elf_swap_verneed_in
1722 (bfd *, const Elf_External_Verneed *, Elf_Internal_Verneed *);
1723 extern void _bfd_elf_swap_verneed_out
1724 (bfd *, const Elf_Internal_Verneed *, Elf_External_Verneed *);
1725 extern void _bfd_elf_swap_vernaux_in
1726 (bfd *, const Elf_External_Vernaux *, Elf_Internal_Vernaux *);
1727 extern void _bfd_elf_swap_vernaux_out
1728 (bfd *, const Elf_Internal_Vernaux *, Elf_External_Vernaux *);
1729 extern void _bfd_elf_swap_versym_in
1730 (bfd *, const Elf_External_Versym *, Elf_Internal_Versym *);
1731 extern void _bfd_elf_swap_versym_out
1732 (bfd *, const Elf_Internal_Versym *, Elf_External_Versym *);
1734 extern unsigned int _bfd_elf_section_from_bfd_section
1735 (bfd *, asection *);
1736 extern char *bfd_elf_string_from_elf_section
1737 (bfd *, unsigned, unsigned);
1738 extern Elf_Internal_Sym *bfd_elf_get_elf_syms
1739 (bfd *, Elf_Internal_Shdr *, size_t, size_t, Elf_Internal_Sym *, void *,
1740 Elf_External_Sym_Shndx *);
1741 extern const char *bfd_elf_sym_name
1742 (bfd *, Elf_Internal_Shdr *, Elf_Internal_Sym *, asection *);
1744 extern bfd_boolean _bfd_elf_copy_private_bfd_data
1746 extern bfd_boolean _bfd_elf_print_private_bfd_data
1748 extern void bfd_elf_print_symbol
1749 (bfd *, void *, asymbol *, bfd_print_symbol_type);
1751 extern unsigned int _bfd_elf_eh_frame_address_size
1752 (bfd *, asection *);
1753 extern bfd_byte _bfd_elf_encode_eh_address
1754 (bfd *abfd, struct bfd_link_info *info, asection *osec, bfd_vma offset,
1755 asection *loc_sec, bfd_vma loc_offset, bfd_vma *encoded);
1756 extern bfd_boolean _bfd_elf_can_make_relative
1757 (bfd *input_bfd, struct bfd_link_info *info, asection *eh_frame_section);
1759 extern enum elf_reloc_type_class _bfd_elf_reloc_type_class
1760 (const Elf_Internal_Rela *);
1761 extern bfd_vma _bfd_elf_rela_local_sym
1762 (bfd *, Elf_Internal_Sym *, asection **, Elf_Internal_Rela *);
1763 extern bfd_vma _bfd_elf_rel_local_sym
1764 (bfd *, Elf_Internal_Sym *, asection **, bfd_vma);
1765 extern bfd_vma _bfd_elf_section_offset
1766 (bfd *, struct bfd_link_info *, asection *, bfd_vma);
1768 extern unsigned long bfd_elf_hash
1770 extern unsigned long bfd_elf_gnu_hash
1773 extern bfd_reloc_status_type bfd_elf_generic_reloc
1774 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
1775 extern bfd_boolean bfd_elf_allocate_object
1776 (bfd *, size_t, enum elf_target_id);
1777 extern bfd_boolean bfd_elf_make_object
1779 extern bfd_boolean bfd_elf_mkcorefile
1781 extern bfd_boolean _bfd_elf_make_section_from_shdr
1782 (bfd *, Elf_Internal_Shdr *, const char *, int);
1783 extern bfd_boolean _bfd_elf_make_section_from_phdr
1784 (bfd *, Elf_Internal_Phdr *, int, const char *);
1785 extern struct bfd_hash_entry *_bfd_elf_link_hash_newfunc
1786 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
1787 extern struct bfd_link_hash_table *_bfd_elf_link_hash_table_create
1789 extern void _bfd_elf_link_hash_copy_indirect
1790 (struct bfd_link_info *, struct elf_link_hash_entry *,
1791 struct elf_link_hash_entry *);
1792 extern void _bfd_elf_link_hash_hide_symbol
1793 (struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean);
1794 extern bfd_boolean _bfd_elf_link_hash_fixup_symbol
1795 (struct bfd_link_info *, struct elf_link_hash_entry *);
1796 extern bfd_boolean _bfd_elf_link_hash_table_init
1797 (struct elf_link_hash_table *, bfd *,
1798 struct bfd_hash_entry *(*)
1799 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *),
1800 unsigned int, enum elf_target_id);
1801 extern bfd_boolean _bfd_elf_slurp_version_tables
1802 (bfd *, bfd_boolean);
1803 extern bfd_boolean _bfd_elf_merge_sections
1804 (bfd *, struct bfd_link_info *);
1805 extern bfd_boolean _bfd_elf_match_sections_by_type
1806 (bfd *, const asection *, bfd *, const asection *);
1807 extern bfd_boolean bfd_elf_is_group_section
1808 (bfd *, const struct bfd_section *);
1809 extern bfd_boolean _bfd_elf_section_already_linked
1810 (bfd *, asection *, struct bfd_link_info *);
1811 extern void bfd_elf_set_group_contents
1812 (bfd *, asection *, void *);
1813 extern asection *_bfd_elf_check_kept_section
1814 (asection *, struct bfd_link_info *);
1815 #define _bfd_elf_link_just_syms _bfd_generic_link_just_syms
1816 extern void _bfd_elf_copy_link_hash_symbol_type
1817 (bfd *, struct bfd_link_hash_entry *, struct bfd_link_hash_entry *);
1818 extern bfd_boolean _bfd_elf_size_group_sections
1819 (struct bfd_link_info *);
1820 extern bfd_boolean _bfd_elf_fixup_group_sections
1821 (bfd *, asection *);
1822 extern bfd_boolean _bfd_elf_copy_private_header_data
1824 extern bfd_boolean _bfd_elf_copy_private_symbol_data
1825 (bfd *, asymbol *, bfd *, asymbol *);
1826 #define _bfd_generic_init_private_section_data \
1827 _bfd_elf_init_private_section_data
1828 extern bfd_boolean _bfd_elf_init_private_section_data
1829 (bfd *, asection *, bfd *, asection *, struct bfd_link_info *);
1830 extern bfd_boolean _bfd_elf_copy_private_section_data
1831 (bfd *, asection *, bfd *, asection *);
1832 extern bfd_boolean _bfd_elf_write_object_contents
1834 extern bfd_boolean _bfd_elf_write_corefile_contents
1836 extern bfd_boolean _bfd_elf_set_section_contents
1837 (bfd *, sec_ptr, const void *, file_ptr, bfd_size_type);
1838 extern long _bfd_elf_get_symtab_upper_bound
1840 extern long _bfd_elf_canonicalize_symtab
1841 (bfd *, asymbol **);
1842 extern long _bfd_elf_get_dynamic_symtab_upper_bound
1844 extern long _bfd_elf_canonicalize_dynamic_symtab
1845 (bfd *, asymbol **);
1846 extern long _bfd_elf_get_synthetic_symtab
1847 (bfd *, long, asymbol **, long, asymbol **, asymbol **);
1848 extern long _bfd_elf_get_reloc_upper_bound
1850 extern long _bfd_elf_canonicalize_reloc
1851 (bfd *, sec_ptr, arelent **, asymbol **);
1852 extern asection * _bfd_elf_get_dynamic_reloc_section
1853 (bfd *, asection *, bfd_boolean);
1854 extern asection * _bfd_elf_make_dynamic_reloc_section
1855 (asection *, bfd *, unsigned int, bfd *, bfd_boolean);
1856 extern long _bfd_elf_get_dynamic_reloc_upper_bound
1858 extern long _bfd_elf_canonicalize_dynamic_reloc
1859 (bfd *, arelent **, asymbol **);
1860 extern asymbol *_bfd_elf_make_empty_symbol
1862 extern void _bfd_elf_get_symbol_info
1863 (bfd *, asymbol *, symbol_info *);
1864 extern bfd_boolean _bfd_elf_is_local_label_name
1865 (bfd *, const char *);
1866 extern alent *_bfd_elf_get_lineno
1868 extern bfd_boolean _bfd_elf_set_arch_mach
1869 (bfd *, enum bfd_architecture, unsigned long);
1870 extern bfd_boolean _bfd_elf_find_nearest_line
1871 (bfd *, asection *, asymbol **, bfd_vma, const char **, const char **,
1873 extern bfd_boolean _bfd_elf_find_line
1874 (bfd *, asymbol **, asymbol *, const char **, unsigned int *);
1875 #define _bfd_generic_find_line _bfd_elf_find_line
1876 extern bfd_boolean _bfd_elf_find_inliner_info
1877 (bfd *, const char **, const char **, unsigned int *);
1878 #define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols
1879 #define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
1880 extern int _bfd_elf_sizeof_headers
1881 (bfd *, struct bfd_link_info *);
1882 extern bfd_boolean _bfd_elf_new_section_hook
1883 (bfd *, asection *);
1884 extern bfd_boolean _bfd_elf_init_reloc_shdr
1885 (bfd *, struct bfd_elf_section_reloc_data *, asection *, bfd_boolean);
1886 extern const struct bfd_elf_special_section *_bfd_elf_get_special_section
1887 (const char *, const struct bfd_elf_special_section *, unsigned int);
1888 extern const struct bfd_elf_special_section *_bfd_elf_get_sec_type_attr
1889 (bfd *, asection *);
1891 /* If the target doesn't have reloc handling written yet: */
1892 extern void _bfd_elf_no_info_to_howto
1893 (bfd *, arelent *, Elf_Internal_Rela *);
1895 extern bfd_boolean bfd_section_from_shdr
1896 (bfd *, unsigned int shindex);
1897 extern bfd_boolean bfd_section_from_phdr
1898 (bfd *, Elf_Internal_Phdr *, int);
1900 extern int _bfd_elf_symbol_from_bfd_symbol
1901 (bfd *, asymbol **);
1903 extern Elf_Internal_Sym *bfd_sym_from_r_symndx
1904 (struct sym_cache *, bfd *, unsigned long);
1905 extern asection *bfd_section_from_elf_index
1906 (bfd *, unsigned int);
1907 extern struct bfd_strtab_hash *_bfd_elf_stringtab_init
1910 extern struct elf_strtab_hash * _bfd_elf_strtab_init
1912 extern void _bfd_elf_strtab_free
1913 (struct elf_strtab_hash *);
1914 extern bfd_size_type _bfd_elf_strtab_add
1915 (struct elf_strtab_hash *, const char *, bfd_boolean);
1916 extern void _bfd_elf_strtab_addref
1917 (struct elf_strtab_hash *, bfd_size_type);
1918 extern void _bfd_elf_strtab_delref
1919 (struct elf_strtab_hash *, bfd_size_type);
1920 extern void _bfd_elf_strtab_clear_all_refs
1921 (struct elf_strtab_hash *);
1922 extern bfd_size_type _bfd_elf_strtab_size
1923 (struct elf_strtab_hash *);
1924 extern bfd_size_type _bfd_elf_strtab_offset
1925 (struct elf_strtab_hash *, bfd_size_type);
1926 extern bfd_boolean _bfd_elf_strtab_emit
1927 (bfd *, struct elf_strtab_hash *);
1928 extern void _bfd_elf_strtab_finalize
1929 (struct elf_strtab_hash *);
1931 extern void _bfd_elf_begin_eh_frame_parsing
1932 (struct bfd_link_info *info);
1933 extern void _bfd_elf_parse_eh_frame
1934 (bfd *, struct bfd_link_info *, asection *, struct elf_reloc_cookie *);
1935 extern void _bfd_elf_end_eh_frame_parsing
1936 (struct bfd_link_info *info);
1938 extern bfd_boolean _bfd_elf_discard_section_eh_frame
1939 (bfd *, struct bfd_link_info *, asection *,
1940 bfd_boolean (*) (bfd_vma, void *), struct elf_reloc_cookie *);
1941 extern bfd_boolean _bfd_elf_discard_section_eh_frame_hdr
1942 (bfd *, struct bfd_link_info *);
1943 extern bfd_vma _bfd_elf_eh_frame_section_offset
1944 (bfd *, struct bfd_link_info *, asection *, bfd_vma);
1945 extern bfd_boolean _bfd_elf_write_section_eh_frame
1946 (bfd *, struct bfd_link_info *, asection *, bfd_byte *);
1947 extern bfd_boolean _bfd_elf_write_section_eh_frame_hdr
1948 (bfd *, struct bfd_link_info *);
1949 extern bfd_boolean _bfd_elf_maybe_strip_eh_frame_hdr
1950 (struct bfd_link_info *);
1952 extern bfd_boolean _bfd_elf_merge_symbol
1953 (bfd *, struct bfd_link_info *, const char *, Elf_Internal_Sym *,
1954 asection **, bfd_vma *, unsigned int *,
1955 struct elf_link_hash_entry **, bfd_boolean *,
1956 bfd_boolean *, bfd_boolean *, bfd_boolean *);
1958 extern bfd_boolean _bfd_elf_hash_symbol (struct elf_link_hash_entry *);
1960 extern long _bfd_elf_link_lookup_local_dynindx
1961 (struct bfd_link_info *, bfd *, long);
1962 extern bfd_boolean _bfd_elf_compute_section_file_positions
1963 (bfd *, struct bfd_link_info *);
1964 extern void _bfd_elf_assign_file_positions_for_relocs
1966 extern file_ptr _bfd_elf_assign_file_position_for_section
1967 (Elf_Internal_Shdr *, file_ptr, bfd_boolean);
1969 extern bfd_boolean _bfd_elf_validate_reloc
1972 extern bfd_boolean _bfd_elf_link_create_dynamic_sections
1973 (bfd *, struct bfd_link_info *);
1974 extern bfd_boolean _bfd_elf_link_omit_section_dynsym
1975 (bfd *, struct bfd_link_info *, asection *);
1976 extern bfd_boolean _bfd_elf_create_dynamic_sections
1977 (bfd *, struct bfd_link_info *);
1978 extern bfd_boolean _bfd_elf_create_got_section
1979 (bfd *, struct bfd_link_info *);
1980 extern struct elf_link_hash_entry *_bfd_elf_define_linkage_sym
1981 (bfd *, struct bfd_link_info *, asection *, const char *);
1982 extern void _bfd_elf_init_1_index_section
1983 (bfd *, struct bfd_link_info *);
1984 extern void _bfd_elf_init_2_index_sections
1985 (bfd *, struct bfd_link_info *);
1987 extern bfd_boolean _bfd_elfcore_make_pseudosection
1988 (bfd *, char *, size_t, ufile_ptr);
1989 extern char *_bfd_elfcore_strndup
1990 (bfd *, char *, size_t);
1992 extern Elf_Internal_Rela *_bfd_elf_link_read_relocs
1993 (bfd *, asection *, void *, Elf_Internal_Rela *, bfd_boolean);
1995 extern bfd_boolean _bfd_elf_link_output_relocs
1996 (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *,
1997 struct elf_link_hash_entry **);
1999 extern bfd_boolean _bfd_elf_adjust_dynamic_copy
2000 (struct elf_link_hash_entry *, asection *);
2002 extern bfd_boolean _bfd_elf_dynamic_symbol_p
2003 (struct elf_link_hash_entry *, struct bfd_link_info *, bfd_boolean);
2005 extern bfd_boolean _bfd_elf_symbol_refs_local_p
2006 (struct elf_link_hash_entry *, struct bfd_link_info *, bfd_boolean);
2008 extern bfd_reloc_status_type bfd_elf_perform_complex_relocation
2009 (bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, bfd_vma);
2011 extern bfd_boolean _bfd_elf_setup_sections
2014 extern void _bfd_elf_set_osabi (bfd * , struct bfd_link_info *);
2016 extern const bfd_target *bfd_elf32_object_p
2018 extern const bfd_target *bfd_elf32_core_file_p
2020 extern char *bfd_elf32_core_file_failing_command
2022 extern int bfd_elf32_core_file_failing_signal
2024 extern bfd_boolean bfd_elf32_core_file_matches_executable_p
2026 extern int bfd_elf32_core_file_pid
2029 extern bfd_boolean bfd_elf32_swap_symbol_in
2030 (bfd *, const void *, const void *, Elf_Internal_Sym *);
2031 extern void bfd_elf32_swap_symbol_out
2032 (bfd *, const Elf_Internal_Sym *, void *, void *);
2033 extern void bfd_elf32_swap_reloc_in
2034 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
2035 extern void bfd_elf32_swap_reloc_out
2036 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
2037 extern void bfd_elf32_swap_reloca_in
2038 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
2039 extern void bfd_elf32_swap_reloca_out
2040 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
2041 extern void bfd_elf32_swap_phdr_in
2042 (bfd *, const Elf32_External_Phdr *, Elf_Internal_Phdr *);
2043 extern void bfd_elf32_swap_phdr_out
2044 (bfd *, const Elf_Internal_Phdr *, Elf32_External_Phdr *);
2045 extern void bfd_elf32_swap_dyn_in
2046 (bfd *, const void *, Elf_Internal_Dyn *);
2047 extern void bfd_elf32_swap_dyn_out
2048 (bfd *, const Elf_Internal_Dyn *, void *);
2049 extern long bfd_elf32_slurp_symbol_table
2050 (bfd *, asymbol **, bfd_boolean);
2051 extern bfd_boolean bfd_elf32_write_shdrs_and_ehdr
2053 extern int bfd_elf32_write_out_phdrs
2054 (bfd *, const Elf_Internal_Phdr *, unsigned int);
2055 extern bfd_boolean bfd_elf32_checksum_contents
2056 (bfd * , void (*) (const void *, size_t, void *), void *);
2057 extern void bfd_elf32_write_relocs
2058 (bfd *, asection *, void *);
2059 extern bfd_boolean bfd_elf32_slurp_reloc_table
2060 (bfd *, asection *, asymbol **, bfd_boolean);
2062 extern const bfd_target *bfd_elf64_object_p
2064 extern const bfd_target *bfd_elf64_core_file_p
2066 extern char *bfd_elf64_core_file_failing_command
2068 extern int bfd_elf64_core_file_failing_signal
2070 extern bfd_boolean bfd_elf64_core_file_matches_executable_p
2072 extern int bfd_elf64_core_file_pid
2075 extern bfd_boolean bfd_elf64_swap_symbol_in
2076 (bfd *, const void *, const void *, Elf_Internal_Sym *);
2077 extern void bfd_elf64_swap_symbol_out
2078 (bfd *, const Elf_Internal_Sym *, void *, void *);
2079 extern void bfd_elf64_swap_reloc_in
2080 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
2081 extern void bfd_elf64_swap_reloc_out
2082 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
2083 extern void bfd_elf64_swap_reloca_in
2084 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
2085 extern void bfd_elf64_swap_reloca_out
2086 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
2087 extern void bfd_elf64_swap_phdr_in
2088 (bfd *, const Elf64_External_Phdr *, Elf_Internal_Phdr *);
2089 extern void bfd_elf64_swap_phdr_out
2090 (bfd *, const Elf_Internal_Phdr *, Elf64_External_Phdr *);
2091 extern void bfd_elf64_swap_dyn_in
2092 (bfd *, const void *, Elf_Internal_Dyn *);
2093 extern void bfd_elf64_swap_dyn_out
2094 (bfd *, const Elf_Internal_Dyn *, void *);
2095 extern long bfd_elf64_slurp_symbol_table
2096 (bfd *, asymbol **, bfd_boolean);
2097 extern bfd_boolean bfd_elf64_write_shdrs_and_ehdr
2099 extern int bfd_elf64_write_out_phdrs
2100 (bfd *, const Elf_Internal_Phdr *, unsigned int);
2101 extern bfd_boolean bfd_elf64_checksum_contents
2102 (bfd * , void (*) (const void *, size_t, void *), void *);
2103 extern void bfd_elf64_write_relocs
2104 (bfd *, asection *, void *);
2105 extern bfd_boolean bfd_elf64_slurp_reloc_table
2106 (bfd *, asection *, asymbol **, bfd_boolean);
2108 extern bfd_boolean _bfd_elf_default_relocs_compatible
2109 (const bfd_target *, const bfd_target *);
2111 extern bfd_boolean _bfd_elf_relocs_compatible
2112 (const bfd_target *, const bfd_target *);
2114 extern struct elf_link_hash_entry *_bfd_elf_archive_symbol_lookup
2115 (bfd *, struct bfd_link_info *, const char *);
2116 extern bfd_boolean bfd_elf_link_add_symbols
2117 (bfd *, struct bfd_link_info *);
2118 extern bfd_boolean _bfd_elf_add_dynamic_entry
2119 (struct bfd_link_info *, bfd_vma, bfd_vma);
2121 extern bfd_boolean bfd_elf_link_record_dynamic_symbol
2122 (struct bfd_link_info *, struct elf_link_hash_entry *);
2124 extern int bfd_elf_link_record_local_dynamic_symbol
2125 (struct bfd_link_info *, bfd *, long);
2127 extern bfd_boolean _bfd_elf_close_and_cleanup
2130 extern bfd_boolean _bfd_elf_common_definition
2131 (Elf_Internal_Sym *);
2133 extern unsigned int _bfd_elf_common_section_index
2136 extern asection *_bfd_elf_common_section
2139 extern bfd_vma _bfd_elf_default_got_elt_size
2140 (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, bfd *,
2143 extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn
2144 (bfd *, arelent *, struct bfd_symbol *, void *,
2145 asection *, bfd *, char **);
2147 extern bfd_boolean bfd_elf_final_link
2148 (bfd *, struct bfd_link_info *);
2150 extern void _bfd_elf_gc_keep
2151 (struct bfd_link_info *info);
2153 extern bfd_boolean bfd_elf_gc_mark_dynamic_ref_symbol
2154 (struct elf_link_hash_entry *h, void *inf);
2156 extern bfd_boolean bfd_elf_gc_sections
2157 (bfd *, struct bfd_link_info *);
2159 extern bfd_boolean bfd_elf_gc_record_vtinherit
2160 (bfd *, asection *, struct elf_link_hash_entry *, bfd_vma);
2162 extern bfd_boolean bfd_elf_gc_record_vtentry
2163 (bfd *, asection *, struct elf_link_hash_entry *, bfd_vma);
2165 extern asection *_bfd_elf_gc_mark_hook
2166 (asection *, struct bfd_link_info *, Elf_Internal_Rela *,
2167 struct elf_link_hash_entry *, Elf_Internal_Sym *);
2169 extern asection *_bfd_elf_gc_mark_rsec
2170 (struct bfd_link_info *, asection *, elf_gc_mark_hook_fn,
2171 struct elf_reloc_cookie *);
2173 extern bfd_boolean _bfd_elf_gc_mark_reloc
2174 (struct bfd_link_info *, asection *, elf_gc_mark_hook_fn,
2175 struct elf_reloc_cookie *);
2177 extern bfd_boolean _bfd_elf_gc_mark_fdes
2178 (struct bfd_link_info *, asection *, asection *, elf_gc_mark_hook_fn,
2179 struct elf_reloc_cookie *);
2181 extern bfd_boolean _bfd_elf_gc_mark
2182 (struct bfd_link_info *, asection *, elf_gc_mark_hook_fn);
2184 extern bfd_boolean _bfd_elf_gc_mark_extra_sections
2185 (struct bfd_link_info *, elf_gc_mark_hook_fn);
2187 extern bfd_boolean bfd_elf_gc_common_finalize_got_offsets
2188 (bfd *, struct bfd_link_info *);
2190 extern bfd_boolean bfd_elf_gc_common_final_link
2191 (bfd *, struct bfd_link_info *);
2193 extern bfd_boolean bfd_elf_reloc_symbol_deleted_p
2196 extern struct elf_segment_map * _bfd_elf_make_dynamic_segment
2197 (bfd *, asection *);
2199 extern bfd_boolean _bfd_elf_map_sections_to_segments
2200 (bfd *, struct bfd_link_info *);
2202 extern bfd_boolean _bfd_elf_is_function_type (unsigned int);
2204 extern bfd_boolean _bfd_elf_maybe_function_sym (const asymbol *,
2205 asection **, bfd_vma *);
2207 extern int bfd_elf_get_default_section_type (flagword);
2209 extern void bfd_elf_lookup_section_flags
2210 (struct bfd_link_info *, struct flag_info *);
2212 extern Elf_Internal_Phdr * _bfd_elf_find_segment_containing_section
2213 (bfd * abfd, asection * section);
2215 /* Exported interface for writing elf corefile notes. */
2216 extern char *elfcore_write_note
2217 (bfd *, char *, int *, const char *, int, const void *, int);
2218 extern char *elfcore_write_prpsinfo
2219 (bfd *, char *, int *, const char *, const char *);
2220 extern char *elfcore_write_prstatus
2221 (bfd *, char *, int *, long, int, const void *);
2222 extern char * elfcore_write_pstatus
2223 (bfd *, char *, int *, long, int, const void *);
2224 extern char *elfcore_write_prfpreg
2225 (bfd *, char *, int *, const void *, int);
2226 extern char *elfcore_write_prxfpreg
2227 (bfd *, char *, int *, const void *, int);
2228 extern char *elfcore_write_xstatereg
2229 (bfd *, char *, int *, const void *, int);
2230 extern char *elfcore_write_ppc_vmx
2231 (bfd *, char *, int *, const void *, int);
2232 extern char *elfcore_write_ppc_vsx
2233 (bfd *, char *, int *, const void *, int);
2234 extern char *elfcore_write_s390_timer
2235 (bfd *, char *, int *, const void *, int);
2236 extern char *elfcore_write_s390_todcmp
2237 (bfd *, char *, int *, const void *, int);
2238 extern char *elfcore_write_s390_todpreg
2239 (bfd *, char *, int *, const void *, int);
2240 extern char *elfcore_write_s390_ctrs
2241 (bfd *, char *, int *, const void *, int);
2242 extern char *elfcore_write_s390_prefix
2243 (bfd *, char *, int *, const void *, int);
2244 extern char *elfcore_write_s390_last_break
2245 (bfd *, char *, int *, const void *, int);
2246 extern char *elfcore_write_s390_system_call
2247 (bfd *, char *, int *, const void *, int);
2248 extern char *elfcore_write_arm_vfp
2249 (bfd *, char *, int *, const void *, int);
2250 extern char *elfcore_write_lwpstatus
2251 (bfd *, char *, int *, long, int, const void *);
2252 extern char *elfcore_write_register_note
2253 (bfd *, char *, int *, const char *, const void *, int);
2255 extern bfd *_bfd_elf32_bfd_from_remote_memory
2256 (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep,
2257 int (*target_read_memory) (bfd_vma, bfd_byte *, int));
2258 extern bfd *_bfd_elf64_bfd_from_remote_memory
2259 (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep,
2260 int (*target_read_memory) (bfd_vma, bfd_byte *, int));
2262 extern bfd_vma bfd_elf_obj_attr_size (bfd *);
2263 extern void bfd_elf_set_obj_attr_contents (bfd *, bfd_byte *, bfd_vma);
2264 extern int bfd_elf_get_obj_attr_int (bfd *, int, int);
2265 extern void bfd_elf_add_obj_attr_int (bfd *, int, int, unsigned int);
2266 #define bfd_elf_add_proc_attr_int(BFD, TAG, VALUE) \
2267 bfd_elf_add_obj_attr_int ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2268 extern void bfd_elf_add_obj_attr_string (bfd *, int, int, const char *);
2269 #define bfd_elf_add_proc_attr_string(BFD, TAG, VALUE) \
2270 bfd_elf_add_obj_attr_string ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2271 extern void bfd_elf_add_obj_attr_int_string (bfd *, int, int, unsigned int,
2273 #define bfd_elf_add_proc_attr_int_string(BFD, TAG, INTVAL, STRVAL) \
2274 bfd_elf_add_obj_attr_int_string ((BFD), OBJ_ATTR_PROC, (TAG), \
2277 extern char *_bfd_elf_attr_strdup (bfd *, const char *);
2278 extern void _bfd_elf_copy_obj_attributes (bfd *, bfd *);
2279 extern int _bfd_elf_obj_attrs_arg_type (bfd *, int, int);
2280 extern void _bfd_elf_parse_attributes (bfd *, Elf_Internal_Shdr *);
2281 extern bfd_boolean _bfd_elf_merge_object_attributes (bfd *, bfd *);
2282 extern bfd_boolean _bfd_elf_merge_unknown_attribute_low (bfd *, bfd *, int);
2283 extern bfd_boolean _bfd_elf_merge_unknown_attribute_list (bfd *, bfd *);
2284 extern Elf_Internal_Shdr *_bfd_elf_single_rel_hdr (asection *sec);
2286 /* The linker may need to keep track of the number of relocs that it
2287 decides to copy as dynamic relocs in check_relocs for each symbol.
2288 This is so that it can later discard them if they are found to be
2289 unnecessary. We can store the information in a field extending the
2290 regular ELF linker hash table. */
2292 struct elf_dyn_relocs
2294 struct elf_dyn_relocs *next;
2296 /* The input section of the reloc. */
2299 /* Total number of relocs copied for the input section. */
2300 bfd_size_type count;
2302 /* Number of pc-relative relocs copied for the input section. */
2303 bfd_size_type pc_count;
2306 extern bfd_boolean _bfd_elf_create_ifunc_sections
2307 (bfd *, struct bfd_link_info *);
2308 extern asection * _bfd_elf_create_ifunc_dyn_reloc
2309 (bfd *, struct bfd_link_info *, asection *sec, asection *sreloc,
2310 struct elf_dyn_relocs **);
2311 extern bfd_boolean _bfd_elf_allocate_ifunc_dyn_relocs
2312 (struct bfd_link_info *, struct elf_link_hash_entry *,
2313 struct elf_dyn_relocs **, unsigned int, unsigned int);
2315 extern void elf_append_rela (bfd *, asection *, Elf_Internal_Rela *);
2316 extern void elf_append_rel (bfd *, asection *, Elf_Internal_Rela *);
2318 extern bfd_vma elf64_r_info (bfd_vma, bfd_vma);
2319 extern bfd_vma elf64_r_sym (bfd_vma);
2320 extern bfd_vma elf32_r_info (bfd_vma, bfd_vma);
2321 extern bfd_vma elf32_r_sym (bfd_vma);
2323 /* Large common section. */
2324 extern asection _bfd_elf_large_com_section;
2326 /* Hash for local symbol with the first section id, ID, in the input
2327 file and the local symbol index, SYM. */
2328 #define ELF_LOCAL_SYMBOL_HASH(ID, SYM) \
2329 (((((ID) & 0xff) << 24) | (((ID) & 0xff00) << 8)) \
2330 ^ (SYM) ^ ((ID) >> 16))
2332 /* This is the condition under which finish_dynamic_symbol will be called.
2333 If our finish_dynamic_symbol isn't called, we'll need to do something
2334 about initializing any .plt and .got entries in relocate_section. */
2335 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
2337 && ((SHARED) || !(H)->forced_local) \
2338 && ((H)->dynindx != -1 || (H)->forced_local))
2340 /* This macro is to avoid lots of duplicated code in the body
2341 of xxx_relocate_section() in the various elfxx-xxxx.c files. */
2342 #define RELOC_FOR_GLOBAL_SYMBOL(info, input_bfd, input_section, rel, \
2343 r_symndx, symtab_hdr, sym_hashes, \
2344 h, sec, relocation, \
2345 unresolved_reloc, warned) \
2348 /* It seems this can happen with erroneous or unsupported \
2349 input (mixing a.out and elf in an archive, for example.) */ \
2350 if (sym_hashes == NULL) \
2353 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; \
2355 while (h->root.type == bfd_link_hash_indirect \
2356 || h->root.type == bfd_link_hash_warning) \
2357 h = (struct elf_link_hash_entry *) h->root.u.i.link; \
2360 unresolved_reloc = FALSE; \
2362 if (h->root.type == bfd_link_hash_defined \
2363 || h->root.type == bfd_link_hash_defweak) \
2365 sec = h->root.u.def.section; \
2367 || sec->output_section == NULL) \
2368 /* Set a flag that will be cleared later if we find a \
2369 relocation value for this symbol. output_section \
2370 is typically NULL for symbols satisfied by a shared \
2372 unresolved_reloc = TRUE; \
2374 relocation = (h->root.u.def.value \
2375 + sec->output_section->vma \
2376 + sec->output_offset); \
2378 else if (h->root.type == bfd_link_hash_undefweak) \
2380 else if (info->unresolved_syms_in_objects == RM_IGNORE \
2381 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) \
2383 else if (!info->relocatable) \
2386 err = (info->unresolved_syms_in_objects == RM_GENERATE_ERROR \
2387 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT); \
2388 if (!info->callbacks->undefined_symbol (info, \
2389 h->root.root.string, \
2392 rel->r_offset, err)) \
2396 (void) unresolved_reloc; \
2401 /* This macro is to avoid lots of duplicated code in the body of the
2402 loop over relocations in xxx_relocate_section() in the various
2405 Handle relocations against symbols from removed linkonce sections,
2406 or sections discarded by a linker script. When doing a relocatable
2407 link, we remove such relocations. Otherwise, we just want the
2408 section contents zeroed and avoid any special processing. */
2409 #define RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
2410 rel, relend, howto, contents) \
2412 _bfd_clear_contents (howto, input_bfd, input_section, \
2413 contents + rel->r_offset); \
2415 if (info->relocatable \
2416 && (input_section->flags & SEC_DEBUGGING)) \
2418 /* Only remove relocations in debug sections since other \
2419 sections may require relocations. */ \
2420 Elf_Internal_Shdr *rel_hdr; \
2422 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
2424 /* Avoid empty output section. */ \
2425 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
2427 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
2428 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
2429 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
2431 memmove (rel, rel + 1, (relend - rel - 1) * sizeof (*rel)); \
2433 input_section->reloc_count--; \
2441 rel->r_addend = 0; \
2445 /* Will a symbol be bound to the the definition within the shared
2446 library, if any. A unique symbol can never be bound locally. */
2447 #define SYMBOLIC_BIND(INFO, H) \
2448 (!(H)->unique_global \
2449 && ((INFO)->symbolic || ((INFO)->dynamic && !(H)->dynamic)))
2451 #endif /* _LIBELF_H_ */