1 /* BFD back-end data structures for ELF files.
2 Copyright (C) 1992-2015 Free Software Foundation, Inc.
3 Written by Cygnus Support.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
25 #include "elf/common.h"
26 #include "elf/external.h"
27 #include "elf/internal.h"
34 /* The number of entries in a section is its size divided by the size
35 of a single entry. This is normally only applicable to reloc and
36 symbol table sections.
37 PR 9934: It is possible to have relocations that do not refer to
38 symbols, thus it is also possible to have a relocation section in
39 an object file, but no symbol table. */
40 #define NUM_SHDR_ENTRIES(shdr) ((shdr)->sh_entsize > 0 ? (shdr)->sh_size / (shdr)->sh_entsize : 0)
42 /* If size isn't specified as 64 or 32, NAME macro should fail. */
45 #define NAME(x, y) x ## 64 ## _ ## y
48 #define NAME(x, y) x ## 32 ## _ ## y
53 #define NAME(x, y) x ## NOSIZE ## _ ## y
56 #define ElfNAME(X) NAME(Elf,X)
57 #define elfNAME(X) NAME(elf,X)
59 /* Information held for an ELF symbol. The first field is the
60 corresponding asymbol. Every symbol is an ELF file is actually a
61 pointer to this structure, although it is often handled as a
62 pointer to an asymbol. */
68 /* ELF symbol information. */
69 Elf_Internal_Sym internal_elf_sym
;
70 /* Backend specific information. */
73 unsigned int hppa_arg_reloc
;
79 /* Version information. This is from an Elf_Internal_Versym
80 structure in a SHT_GNU_versym section. It is zero if there is no
81 version information. */
82 unsigned short version
;
86 struct elf_strtab_hash
;
92 bfd_signed_vma refcount
;
94 struct got_entry
*glist
;
95 struct plt_entry
*plist
;
98 struct elf_link_virtual_table_entry
100 /* Virtual table entry use information. This array is nominally of size
101 size/sizeof(target_void_pointer), though we have to be able to assume
102 and track a size while the symbol is still undefined. It is indexed
103 via offset/sizeof(target_void_pointer). */
107 /* Virtual table derivation info. */
108 struct elf_link_hash_entry
*parent
;
111 /* ELF linker hash table entries. */
113 struct elf_link_hash_entry
115 struct bfd_link_hash_entry root
;
117 /* Symbol index in output file. This is initialized to -1. It is
118 set to -2 if the symbol is used by a reloc. */
121 /* Symbol index as a dynamic symbol. Initialized to -1, and remains
122 -1 if this is not a dynamic symbol. */
123 /* ??? Note that this is consistently used as a synonym for tests
124 against whether we can perform various simplifying transformations
125 to the code. (E.g. changing a pc-relative jump to a PLT entry
126 into a pc-relative jump to the target function.) That test, which
127 is often relatively complex, and someplaces wrong or incomplete,
128 should really be replaced by a predicate in elflink.c.
130 End result: this field -1 does not indicate that the symbol is
131 not in the dynamic symbol table, but rather that the symbol is
132 not visible outside this DSO. */
135 /* If this symbol requires an entry in the global offset table, the
136 processor specific backend uses this field to track usage and
137 final offset. Two schemes are supported: The first assumes that
138 a symbol may only have one GOT entry, and uses REFCOUNT until
139 size_dynamic_sections, at which point the contents of the .got is
140 fixed. Afterward, if OFFSET is -1, then the symbol does not
141 require a global offset table entry. The second scheme allows
142 multiple GOT entries per symbol, managed via a linked list
143 pointed to by GLIST. */
144 union gotplt_union got
;
146 /* Same, but tracks a procedure linkage table entry. */
147 union gotplt_union plt
;
152 /* Symbol type (STT_NOTYPE, STT_OBJECT, etc.). */
153 unsigned int type
: 8;
155 /* Symbol st_other value, symbol visibility. */
156 unsigned int other
: 8;
158 /* The symbol's st_target_internal value (see Elf_Internal_Sym). */
159 unsigned int target_internal
: 8;
161 /* Symbol is referenced by a non-shared object (other than the object
162 in which it is defined). */
163 unsigned int ref_regular
: 1;
164 /* Symbol is defined by a non-shared object. */
165 unsigned int def_regular
: 1;
166 /* Symbol is referenced by a shared object. */
167 unsigned int ref_dynamic
: 1;
168 /* Symbol is defined by a shared object. */
169 unsigned int def_dynamic
: 1;
170 /* Symbol has a non-weak reference from a non-shared object (other than
171 the object in which it is defined). */
172 unsigned int ref_regular_nonweak
: 1;
173 /* Dynamic symbol has been adjustd. */
174 unsigned int dynamic_adjusted
: 1;
175 /* Symbol needs a copy reloc. */
176 unsigned int needs_copy
: 1;
177 /* Symbol needs a procedure linkage table entry. */
178 unsigned int needs_plt
: 1;
179 /* Symbol appears in a non-ELF input file. */
180 unsigned int non_elf
: 1;
181 /* Symbol should be marked as hidden in the version information. */
182 unsigned int hidden
: 1;
183 /* Symbol was forced to local scope due to a version script file. */
184 unsigned int forced_local
: 1;
185 /* Symbol was forced to be dynamic due to a version script file. */
186 unsigned int dynamic
: 1;
187 /* Symbol was marked during garbage collection. */
188 unsigned int mark
: 1;
189 /* Symbol is referenced by a non-GOT/non-PLT relocation. This is
190 not currently set by all the backends. */
191 unsigned int non_got_ref
: 1;
192 /* Symbol has a definition in a shared object.
193 FIXME: There is no real need for this field if def_dynamic is never
194 cleared and all places that test def_dynamic also test def_regular. */
195 unsigned int dynamic_def
: 1;
196 /* Symbol has a non-weak reference from a shared object. */
197 unsigned int ref_dynamic_nonweak
: 1;
198 /* Symbol is referenced with a relocation where C/C++ pointer equality
200 unsigned int pointer_equality_needed
: 1;
201 /* Symbol is a unique global symbol. */
202 unsigned int unique_global
: 1;
203 /* Symbol is defined with non-default visibility. */
204 unsigned int protected_def
: 1;
206 /* String table index in .dynstr if this is a dynamic symbol. */
207 unsigned long dynstr_index
;
211 /* If this is a weak defined symbol from a dynamic object, this
212 field points to a defined symbol with the same value, if there is
213 one. Otherwise it is NULL. */
214 struct elf_link_hash_entry
*weakdef
;
216 /* Hash value of the name computed using the ELF hash function.
217 Used part way through size_dynamic_sections, after we've finished
219 unsigned long elf_hash_value
;
222 /* Version information. */
225 /* This field is used for a symbol which is not defined in a
226 regular object. It points to the version information read in
227 from the dynamic object. */
228 Elf_Internal_Verdef
*verdef
;
229 /* This field is used for a symbol which is defined in a regular
230 object. It is set up in size_dynamic_sections. It points to
231 the version information we should write out for this symbol. */
232 struct bfd_elf_version_tree
*vertree
;
235 struct elf_link_virtual_table_entry
*vtable
;
238 /* Will references to this symbol always reference the symbol
240 #define SYMBOL_REFERENCES_LOCAL(INFO, H) \
241 _bfd_elf_symbol_refs_local_p (H, INFO, 0)
243 /* Will _calls_ to this symbol always call the version in this object? */
244 #define SYMBOL_CALLS_LOCAL(INFO, H) \
245 _bfd_elf_symbol_refs_local_p (H, INFO, 1)
247 /* Common symbols that are turned into definitions don't have the
248 DEF_REGULAR flag set, so they might appear to be undefined.
249 Symbols defined in linker scripts also don't have DEF_REGULAR set. */
250 #define ELF_COMMON_DEF_P(H) \
252 && !(H)->def_dynamic \
253 && (H)->root.type == bfd_link_hash_defined)
255 /* Records local symbols to be emitted in the dynamic symbol table. */
257 struct elf_link_local_dynamic_entry
259 struct elf_link_local_dynamic_entry
*next
;
261 /* The input bfd this symbol came from. */
264 /* The index of the local symbol being copied. */
267 /* The index in the outgoing dynamic symbol table. */
270 /* A copy of the input symbol. */
271 Elf_Internal_Sym isym
;
274 struct elf_link_loaded_list
276 struct elf_link_loaded_list
*next
;
280 /* Structures used by the eh_frame optimization code. */
285 /* If REMOVED == 1, this is the CIE that the FDE originally used.
286 The CIE belongs to the same .eh_frame input section as the FDE.
288 If REMOVED == 0, this is the CIE that we have chosen to use for
289 the output FDE. The CIE's REMOVED field is also 0, but the CIE
290 might belong to a different .eh_frame input section from the FDE.
292 May be NULL to signify that the FDE should be discarded. */
293 struct eh_cie_fde
*cie_inf
;
294 struct eh_cie_fde
*next_for_section
;
297 /* CIEs have three states:
299 - REMOVED && !MERGED: Slated for removal because we haven't yet
300 proven that an FDE needs it. FULL_CIE, if nonnull, points to
301 more detailed information about the CIE.
303 - REMOVED && MERGED: We have merged this CIE with MERGED_WITH,
304 which may not belong to the same input section.
306 - !REMOVED: We have decided to keep this CIE. SEC is the
307 .eh_frame input section that contains the CIE. */
309 struct cie
*full_cie
;
310 struct eh_cie_fde
*merged_with
;
314 /* The offset of the personality data from the start of the CIE,
315 or 0 if the CIE doesn't have any. */
316 unsigned int personality_offset
: 8;
318 /* True if we have marked relocations associated with this CIE. */
319 unsigned int gc_mark
: 1;
321 /* True if we have decided to turn an absolute LSDA encoding into
322 a PC-relative one. */
323 unsigned int make_lsda_relative
: 1;
325 /* True if we have decided to turn an absolute personality
326 encoding into a PC-relative one. */
327 unsigned int make_per_encoding_relative
: 1;
329 /* True if the CIE contains personality data and if that
330 data uses a PC-relative encoding. Always true when
331 make_per_encoding_relative is. */
332 unsigned int per_encoding_relative
: 1;
334 /* True if we need to add an 'R' (FDE encoding) entry to the
335 CIE's augmentation data. */
336 unsigned int add_fde_encoding
: 1;
338 /* True if we have merged this CIE with another. */
339 unsigned int merged
: 1;
342 unsigned int pad1
: 18;
345 unsigned int reloc_index
;
348 unsigned int new_offset
;
349 unsigned int fde_encoding
: 8;
350 unsigned int lsda_encoding
: 8;
351 unsigned int lsda_offset
: 8;
353 /* True if this entry represents a CIE, false if it represents an FDE. */
354 unsigned int cie
: 1;
356 /* True if this entry is currently marked for removal. */
357 unsigned int removed
: 1;
359 /* True if we need to add a 'z' (augmentation size) entry to the CIE's
360 augmentation data, and an associated byte to each of the CIE's FDEs. */
361 unsigned int add_augmentation_size
: 1;
363 /* True if we have decided to convert absolute FDE relocations into
364 relative ones. This applies to the first relocation in the FDE,
365 which is against the code that the FDE describes. */
366 unsigned int make_relative
: 1;
369 unsigned int pad1
: 4;
371 unsigned int *set_loc
;
374 struct eh_frame_sec_info
378 struct eh_cie_fde entry
[1];
381 struct eh_frame_array_ent
390 struct eh_frame_hdr_info
394 unsigned int fde_count
, array_count
;
395 struct eh_frame_array_ent
*array
;
396 /* TRUE if .eh_frame_hdr should contain the sorted search table.
397 We build it if we successfully read all .eh_frame input sections
398 and recognize them. */
402 /* Enum used to identify target specific extensions to the elf_obj_tdata
403 and elf_link_hash_table structures. Note the enums deliberately start
404 from 1 so that we can detect an uninitialized field. The generic value
405 is last so that additions to this enum do not need to modify more than
409 AARCH64_ELF_DATA
= 1,
446 /* ELF linker hash table. */
448 struct elf_link_hash_table
450 struct bfd_link_hash_table root
;
452 /* An identifier used to distinguish different target
453 specific extensions to this structure. */
454 enum elf_target_id hash_table_id
;
456 /* Whether we have created the special dynamic sections required
457 when linking against or generating a shared object. */
458 bfd_boolean dynamic_sections_created
;
460 /* True if this target has relocatable executables, so needs dynamic
462 bfd_boolean is_relocatable_executable
;
464 /* The BFD used to hold special sections created by the linker.
465 This will be the first BFD found which requires these sections to
469 /* The value to use when initialising got.refcount/offset and
470 plt.refcount/offset in an elf_link_hash_entry. Set to zero when
471 the values are refcounts. Set to init_got_offset/init_plt_offset
472 in size_dynamic_sections when the values may be offsets. */
473 union gotplt_union init_got_refcount
;
474 union gotplt_union init_plt_refcount
;
476 /* The value to use for got.refcount/offset and plt.refcount/offset
477 when the values may be offsets. Normally (bfd_vma) -1. */
478 union gotplt_union init_got_offset
;
479 union gotplt_union init_plt_offset
;
481 /* The number of symbols found in the link which must be put into
482 the .dynsym section. */
483 bfd_size_type dynsymcount
;
485 /* The string table of dynamic symbols, which becomes the .dynstr
487 struct elf_strtab_hash
*dynstr
;
489 /* The number of buckets in the hash table in the .hash section.
490 This is based on the number of dynamic symbols. */
491 bfd_size_type bucketcount
;
493 /* A linked list of DT_NEEDED names found in dynamic objects
494 included in the link. */
495 struct bfd_link_needed_list
*needed
;
497 /* Sections in the output bfd that provides a section symbol
498 to be used by relocations emitted against local symbols.
499 Most targets will not use data_index_section. */
500 asection
*text_index_section
;
501 asection
*data_index_section
;
503 /* The _GLOBAL_OFFSET_TABLE_ symbol. */
504 struct elf_link_hash_entry
*hgot
;
506 /* The _PROCEDURE_LINKAGE_TABLE_ symbol. */
507 struct elf_link_hash_entry
*hplt
;
509 /* The _DYNAMIC symbol. */
510 struct elf_link_hash_entry
*hdynamic
;
512 /* A pointer to information used to merge SEC_MERGE sections. */
515 /* Used to link stabs in sections. */
516 struct stab_info stab_info
;
518 /* Used by eh_frame code when editing .eh_frame. */
519 struct eh_frame_hdr_info eh_info
;
521 /* A linked list of local symbols to be added to .dynsym. */
522 struct elf_link_local_dynamic_entry
*dynlocal
;
524 /* A linked list of DT_RPATH/DT_RUNPATH names found in dynamic
525 objects included in the link. */
526 struct bfd_link_needed_list
*runpath
;
528 /* Cached first output tls section and size of PT_TLS segment. */
530 bfd_size_type tls_size
;
532 /* A linked list of BFD's loaded in the link. */
533 struct elf_link_loaded_list
*loaded
;
535 /* Short-cuts to get to dynamic linker sections. */
547 /* Look up an entry in an ELF linker hash table. */
549 #define elf_link_hash_lookup(table, string, create, copy, follow) \
550 ((struct elf_link_hash_entry *) \
551 bfd_link_hash_lookup (&(table)->root, (string), (create), \
554 /* Traverse an ELF linker hash table. */
556 #define elf_link_hash_traverse(table, func, info) \
557 (bfd_link_hash_traverse \
559 (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func), \
562 /* Get the ELF linker hash table from a link_info structure. */
564 #define elf_hash_table(p) ((struct elf_link_hash_table *) ((p)->hash))
566 #define elf_hash_table_id(table) ((table) -> hash_table_id)
568 /* Returns TRUE if the hash table is a struct elf_link_hash_table. */
569 #define is_elf_hash_table(htab) \
570 (((struct bfd_link_hash_table *) (htab))->type == bfd_link_elf_hash_table)
572 /* Used by bfd_sym_from_r_symndx to cache a small number of local
574 #define LOCAL_SYM_CACHE_SIZE 32
578 unsigned long indx
[LOCAL_SYM_CACHE_SIZE
];
579 Elf_Internal_Sym sym
[LOCAL_SYM_CACHE_SIZE
];
582 /* Constant information held for an ELF backend. */
584 struct elf_size_info
{
585 unsigned char sizeof_ehdr
, sizeof_phdr
, sizeof_shdr
;
586 unsigned char sizeof_rel
, sizeof_rela
, sizeof_sym
, sizeof_dyn
, sizeof_note
;
588 /* The size of entries in the .hash section. */
589 unsigned char sizeof_hash_entry
;
591 /* The number of internal relocations to allocate per external
593 unsigned char int_rels_per_ext_rel
;
594 /* We use some fixed size arrays. This should be large enough to
595 handle all back-ends. */
596 #define MAX_INT_RELS_PER_EXT_REL 3
598 unsigned char arch_size
, log_file_align
;
599 unsigned char elfclass
, ev_current
;
600 int (*write_out_phdrs
)
601 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
603 (*write_shdrs_and_ehdr
) (bfd
*);
604 bfd_boolean (*checksum_contents
)
605 (bfd
* , void (*) (const void *, size_t, void *), void *);
607 (bfd
*, asection
*, void *);
608 bfd_boolean (*swap_symbol_in
)
609 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
610 void (*swap_symbol_out
)
611 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
612 bfd_boolean (*slurp_reloc_table
)
613 (bfd
*, asection
*, asymbol
**, bfd_boolean
);
614 long (*slurp_symbol_table
)
615 (bfd
*, asymbol
**, bfd_boolean
);
617 (bfd
*, const void *, Elf_Internal_Dyn
*);
619 (bfd
*, const Elf_Internal_Dyn
*, void *);
621 /* This function is called to swap in a REL relocation. If an
622 external relocation corresponds to more than one internal
623 relocation, then all relocations are swapped in at once. */
624 void (*swap_reloc_in
)
625 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
627 /* This function is called to swap out a REL relocation. */
628 void (*swap_reloc_out
)
629 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
631 /* This function is called to swap in a RELA relocation. If an
632 external relocation corresponds to more than one internal
633 relocation, then all relocations are swapped in at once. */
634 void (*swap_reloca_in
)
635 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
637 /* This function is called to swap out a RELA relocation. */
638 void (*swap_reloca_out
)
639 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
642 #define elf_symbol_from(ABFD,S) \
643 (((S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \
644 && (S)->the_bfd->tdata.elf_obj_data != 0) \
645 ? (elf_symbol_type *) (S) \
648 enum elf_reloc_type_class
{
650 reloc_class_relative
,
656 struct elf_reloc_cookie
658 Elf_Internal_Rela
*rels
, *rel
, *relend
;
659 Elf_Internal_Sym
*locsyms
;
663 struct elf_link_hash_entry
**sym_hashes
;
665 bfd_boolean bad_symtab
;
668 /* The level of IRIX compatibility we're striving for. */
676 /* Mapping of ELF section names and types. */
677 struct bfd_elf_special_section
681 /* 0 means name must match PREFIX exactly.
682 -1 means name must start with PREFIX followed by an arbitrary string.
683 -2 means name must match PREFIX exactly or consist of PREFIX followed
684 by a dot then anything.
685 > 0 means name must start with the first PREFIX_LENGTH chars of
686 PREFIX and finish with the last SUFFIX_LENGTH chars of PREFIX. */
692 enum action_discarded
698 typedef asection
* (*elf_gc_mark_hook_fn
)
699 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
700 struct elf_link_hash_entry
*, Elf_Internal_Sym
*);
702 struct elf_backend_data
704 /* The architecture for this backend. */
705 enum bfd_architecture arch
;
707 /* An identifier used to distinguish different target specific
708 extensions to elf_obj_tdata and elf_link_hash_table structures. */
709 enum elf_target_id target_id
;
711 /* The ELF machine code (EM_xxxx) for this backend. */
712 int elf_machine_code
;
717 /* The maximum page size for this backend. */
720 /* The minimum page size for this backend. An input object will not be
721 considered page aligned unless its sections are correctly aligned for
722 pages at least this large. May be smaller than maxpagesize. */
725 /* The common page size for this backend. */
726 bfd_vma commonpagesize
;
728 /* The BFD flags applied to sections created for dynamic linking. */
729 flagword dynamic_sec_flags
;
731 /* Architecture-specific data for this backend.
732 This is actually a pointer to some type like struct elf_ARCH_data. */
733 const void *arch_data
;
735 /* A function to translate an ELF RELA relocation to a BFD arelent
737 void (*elf_info_to_howto
)
738 (bfd
*, arelent
*, Elf_Internal_Rela
*);
740 /* A function to translate an ELF REL relocation to a BFD arelent
742 void (*elf_info_to_howto_rel
)
743 (bfd
*, arelent
*, Elf_Internal_Rela
*);
745 /* A function to determine whether a symbol is global when
746 partitioning the symbol table into local and global symbols.
747 This should be NULL for most targets, in which case the correct
748 thing will be done. MIPS ELF, at least on the Irix 5, has
749 special requirements. */
750 bfd_boolean (*elf_backend_sym_is_global
)
753 /* The remaining functions are hooks which are called only if they
756 /* A function to permit a backend specific check on whether a
757 particular BFD format is relevant for an object file, and to
758 permit the backend to set any global information it wishes. When
759 this is called elf_elfheader is set, but anything else should be
760 used with caution. If this returns FALSE, the check_format
761 routine will return a bfd_error_wrong_format error. */
762 bfd_boolean (*elf_backend_object_p
)
765 /* A function to do additional symbol processing when reading the
766 ELF symbol table. This is where any processor-specific special
767 section indices are handled. */
768 void (*elf_backend_symbol_processing
)
771 /* A function to do additional symbol processing after reading the
772 entire ELF symbol table. */
773 bfd_boolean (*elf_backend_symbol_table_processing
)
774 (bfd
*, elf_symbol_type
*, unsigned int);
776 /* A function to set the type of the info field. Processor-specific
777 types should be handled here. */
778 int (*elf_backend_get_symbol_type
)
779 (Elf_Internal_Sym
*, int);
781 /* A function to return the linker hash table entry of a symbol that
782 might be satisfied by an archive symbol. */
783 struct elf_link_hash_entry
* (*elf_backend_archive_symbol_lookup
)
784 (bfd
*, struct bfd_link_info
*, const char *);
786 /* Return true if local section symbols should have a non-null st_name.
787 NULL implies false. */
788 bfd_boolean (*elf_backend_name_local_section_symbols
)
791 /* A function to do additional processing on the ELF section header
792 just before writing it out. This is used to set the flags and
793 type fields for some sections, or to actually write out data for
795 bfd_boolean (*elf_backend_section_processing
)
796 (bfd
*, Elf_Internal_Shdr
*);
798 /* A function to handle unusual section types when creating BFD
799 sections from ELF sections. */
800 bfd_boolean (*elf_backend_section_from_shdr
)
801 (bfd
*, Elf_Internal_Shdr
*, const char *, int);
803 /* A function to convert machine dependent ELF section header flags to
804 BFD internal section header flags. */
805 bfd_boolean (*elf_backend_section_flags
)
806 (flagword
*, const Elf_Internal_Shdr
*);
808 /* A function that returns a struct containing ELF section flags and
809 type for the given BFD section. */
810 const struct bfd_elf_special_section
* (*get_sec_type_attr
)
813 /* A function to handle unusual program segment types when creating BFD
814 sections from ELF program segments. */
815 bfd_boolean (*elf_backend_section_from_phdr
)
816 (bfd
*, Elf_Internal_Phdr
*, int, const char *);
818 /* A function to set up the ELF section header for a BFD section in
819 preparation for writing it out. This is where the flags and type
820 fields are set for unusual sections. */
821 bfd_boolean (*elf_backend_fake_sections
)
822 (bfd
*, Elf_Internal_Shdr
*, asection
*);
824 /* A function to get the ELF section index for a BFD section. If
825 this returns TRUE, the section was found. If it is a normal ELF
826 section, *RETVAL should be left unchanged. If it is not a normal
827 ELF section *RETVAL should be set to the SHN_xxxx index. */
828 bfd_boolean (*elf_backend_section_from_bfd_section
)
829 (bfd
*, asection
*, int *retval
);
831 /* If this field is not NULL, it is called by the add_symbols phase
832 of a link just before adding a symbol to the global linker hash
833 table. It may modify any of the fields as it wishes. If *NAME
834 is set to NULL, the symbol will be skipped rather than being
835 added to the hash table. This function is responsible for
836 handling all processor dependent symbol bindings and section
837 indices, and must set at least *FLAGS and *SEC for each processor
838 dependent case; failure to do so will cause a link error. */
839 bfd_boolean (*elf_add_symbol_hook
)
840 (bfd
*abfd
, struct bfd_link_info
*info
, Elf_Internal_Sym
*,
841 const char **name
, flagword
*flags
, asection
**sec
, bfd_vma
*value
);
843 /* If this field is not NULL, it is called by the elf_link_output_sym
844 phase of a link for each symbol which will appear in the object file.
845 On error, this function returns 0. 1 is returned when the symbol
846 should be output, 2 is returned when the symbol should be discarded. */
847 int (*elf_backend_link_output_symbol_hook
)
848 (struct bfd_link_info
*info
, const char *, Elf_Internal_Sym
*,
849 asection
*, struct elf_link_hash_entry
*);
851 /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend
852 linker the first time it encounters a dynamic object in the link.
853 This function must create any sections required for dynamic
854 linking. The ABFD argument is a dynamic object. The .interp,
855 .dynamic, .dynsym, .dynstr, and .hash functions have already been
856 created, and this function may modify the section flags if
857 desired. This function will normally create the .got and .plt
858 sections, but different backends have different requirements. */
859 bfd_boolean (*elf_backend_create_dynamic_sections
)
860 (bfd
*abfd
, struct bfd_link_info
*info
);
862 /* When creating a shared library, determine whether to omit the
863 dynamic symbol for the section. */
864 bfd_boolean (*elf_backend_omit_section_dynsym
)
865 (bfd
*output_bfd
, struct bfd_link_info
*info
, asection
*osec
);
867 /* Return TRUE if relocations of targets are compatible to the extent
868 that CHECK_RELOCS will properly process them. PR 4424. */
869 bfd_boolean (*relocs_compatible
) (const bfd_target
*, const bfd_target
*);
871 /* The CHECK_RELOCS function is called by the add_symbols phase of
872 the ELF backend linker. It is called once for each section with
873 relocs of an object file, just after the symbols for the object
874 file have been added to the global linker hash table. The
875 function must look through the relocs and do any special handling
876 required. This generally means allocating space in the global
877 offset table, and perhaps allocating space for a reloc. The
878 relocs are always passed as Rela structures; if the section
879 actually uses Rel structures, the r_addend field will always be
881 bfd_boolean (*check_relocs
)
882 (bfd
*abfd
, struct bfd_link_info
*info
, asection
*o
,
883 const Elf_Internal_Rela
*relocs
);
885 /* The CHECK_DIRECTIVES function is called once per input file by
886 the add_symbols phase of the ELF backend linker. The function
887 must inspect the bfd and create any additional symbols according
888 to any custom directives in the bfd. */
889 bfd_boolean (*check_directives
)
890 (bfd
*abfd
, struct bfd_link_info
*info
);
892 /* The NOTICE_AS_NEEDED function is called as the linker is about to
893 handle an as-needed lib (ACT = notice_as_needed), and after the
894 linker has decided to keep the lib (ACT = notice_needed) or when
895 the lib is not needed (ACT = notice_not_needed). */
896 bfd_boolean (*notice_as_needed
)
897 (bfd
*abfd
, struct bfd_link_info
*info
, enum notice_asneeded_action act
);
899 /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
900 linker for every symbol which is defined by a dynamic object and
901 referenced by a regular object. This is called after all the
902 input files have been seen, but before the SIZE_DYNAMIC_SECTIONS
903 function has been called. The hash table entry should be
904 bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be
905 defined in a section from a dynamic object. Dynamic object
906 sections are not included in the final link, and this function is
907 responsible for changing the value to something which the rest of
908 the link can deal with. This will normally involve adding an
909 entry to the .plt or .got or some such section, and setting the
910 symbol to point to that. */
911 bfd_boolean (*elf_backend_adjust_dynamic_symbol
)
912 (struct bfd_link_info
*info
, struct elf_link_hash_entry
*h
);
914 /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker
915 after all the linker input files have been seen but before the
916 section sizes have been set. This is called after
917 ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS. */
918 bfd_boolean (*elf_backend_always_size_sections
)
919 (bfd
*output_bfd
, struct bfd_link_info
*info
);
921 /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend
922 linker after all the linker input files have been seen but before
923 the sections sizes have been set. This is called after
924 ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols.
925 It is only called when linking against a dynamic object. It must
926 set the sizes of the dynamic sections, and may fill in their
927 contents as well. The generic ELF linker can handle the .dynsym,
928 .dynstr and .hash sections. This function must handle the
929 .interp section and any sections created by the
930 CREATE_DYNAMIC_SECTIONS entry point. */
931 bfd_boolean (*elf_backend_size_dynamic_sections
)
932 (bfd
*output_bfd
, struct bfd_link_info
*info
);
934 /* Set TEXT_INDEX_SECTION and DATA_INDEX_SECTION, the output sections
935 we keep to use as a base for relocs and symbols. */
936 void (*elf_backend_init_index_section
)
937 (bfd
*output_bfd
, struct bfd_link_info
*info
);
939 /* The RELOCATE_SECTION function is called by the ELF backend linker
940 to handle the relocations for a section.
942 The relocs are always passed as Rela structures; if the section
943 actually uses Rel structures, the r_addend field will always be
946 This function is responsible for adjust the section contents as
947 necessary, and (if using Rela relocs and generating a
948 relocatable output file) adjusting the reloc addend as
951 This function does not have to worry about setting the reloc
952 address or the reloc symbol index.
954 LOCAL_SYMS is a pointer to the swapped in local symbols.
956 LOCAL_SECTIONS is an array giving the section in the input file
957 corresponding to the st_shndx field of each local symbol.
959 The global hash table entry for the global symbols can be found
960 via elf_sym_hashes (input_bfd).
962 When generating relocatable output, this function must handle
963 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
964 going to be the section symbol corresponding to the output
965 section, which means that the addend must be adjusted
968 Returns FALSE on error, TRUE on success, 2 if successful and
969 relocations should be written for this section. */
970 int (*elf_backend_relocate_section
)
971 (bfd
*output_bfd
, struct bfd_link_info
*info
, bfd
*input_bfd
,
972 asection
*input_section
, bfd_byte
*contents
, Elf_Internal_Rela
*relocs
,
973 Elf_Internal_Sym
*local_syms
, asection
**local_sections
);
975 /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend
976 linker just before it writes a symbol out to the .dynsym section.
977 The processor backend may make any required adjustment to the
978 symbol. It may also take the opportunity to set contents of the
979 dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on
980 all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called
981 on those symbols which are defined by a dynamic object. */
982 bfd_boolean (*elf_backend_finish_dynamic_symbol
)
983 (bfd
*output_bfd
, struct bfd_link_info
*info
,
984 struct elf_link_hash_entry
*h
, Elf_Internal_Sym
*sym
);
986 /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend
987 linker just before it writes all the dynamic sections out to the
988 output file. The FINISH_DYNAMIC_SYMBOL will have been called on
989 all dynamic symbols. */
990 bfd_boolean (*elf_backend_finish_dynamic_sections
)
991 (bfd
*output_bfd
, struct bfd_link_info
*info
);
993 /* A function to do any beginning processing needed for the ELF file
994 before building the ELF headers and computing file positions. */
995 void (*elf_backend_begin_write_processing
)
996 (bfd
*, struct bfd_link_info
*);
998 /* A function to do any final processing needed for the ELF file
999 before writing it out. The LINKER argument is TRUE if this BFD
1000 was created by the ELF backend linker. */
1001 void (*elf_backend_final_write_processing
)
1002 (bfd
*, bfd_boolean linker
);
1004 /* This function is called by get_program_header_size. It should
1005 return the number of additional program segments which this BFD
1006 will need. It should return -1 on error. */
1007 int (*elf_backend_additional_program_headers
)
1008 (bfd
*, struct bfd_link_info
*);
1010 /* This function is called to modify an existing segment map in a
1011 backend specific fashion. */
1012 bfd_boolean (*elf_backend_modify_segment_map
)
1013 (bfd
*, struct bfd_link_info
*);
1015 /* This function is called to modify program headers just before
1016 they are written. */
1017 bfd_boolean (*elf_backend_modify_program_headers
)
1018 (bfd
*, struct bfd_link_info
*);
1020 /* This function is called before section garbage collection to
1021 mark entry symbol sections. */
1023 (struct bfd_link_info
*);
1025 /* This function is called during section garbage collection to
1026 mark sections that define global symbols. */
1027 bfd_boolean (*gc_mark_dynamic_ref
)
1028 (struct elf_link_hash_entry
*, void *);
1030 /* This function is called during section gc to discover the section a
1031 particular relocation refers to. */
1032 elf_gc_mark_hook_fn gc_mark_hook
;
1034 /* This function, if defined, is called after the first gc marking pass
1035 to allow the backend to mark additional sections. */
1036 bfd_boolean (*gc_mark_extra_sections
)
1037 (struct bfd_link_info
*, elf_gc_mark_hook_fn
);
1039 /* This function, if defined, is called during the sweep phase of gc
1040 in order that a backend might update any data structures it might
1042 bfd_boolean (*gc_sweep_hook
)
1043 (bfd
*, struct bfd_link_info
*, asection
*, const Elf_Internal_Rela
*);
1045 /* This function, if defined, is called after the ELF headers have
1046 been created. This allows for things like the OS and ABI versions
1048 void (*elf_backend_post_process_headers
)
1049 (bfd
*, struct bfd_link_info
*);
1051 /* This function, if defined, prints a symbol to file and returns the
1052 name of the symbol to be printed. It should return NULL to fall
1053 back to default symbol printing. */
1054 const char *(*elf_backend_print_symbol_all
)
1055 (bfd
*, void *, asymbol
*);
1057 /* This function, if defined, is called after all local symbols and
1058 global symbols converted to locals are emitted into the symtab
1059 section. It allows the backend to emit special local symbols
1060 not handled in the hash table. */
1061 bfd_boolean (*elf_backend_output_arch_local_syms
)
1062 (bfd
*, struct bfd_link_info
*, void *,
1063 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym
*, asection
*,
1064 struct elf_link_hash_entry
*));
1066 /* This function, if defined, is called after all symbols are emitted
1067 into the symtab section. It allows the backend to emit special
1068 global symbols not handled in the hash table. */
1069 bfd_boolean (*elf_backend_output_arch_syms
)
1070 (bfd
*, struct bfd_link_info
*, void *,
1071 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym
*, asection
*,
1072 struct elf_link_hash_entry
*));
1074 /* Copy any information related to dynamic linking from a pre-existing
1075 symbol to a newly created symbol. Also called to copy flags and
1076 other back-end info to a weakdef, in which case the symbol is not
1077 newly created and plt/got refcounts and dynamic indices should not
1079 void (*elf_backend_copy_indirect_symbol
)
1080 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
1081 struct elf_link_hash_entry
*);
1083 /* Modify any information related to dynamic linking such that the
1084 symbol is not exported. */
1085 void (*elf_backend_hide_symbol
)
1086 (struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd_boolean
);
1088 /* A function to do additional symbol fixup, called by
1089 _bfd_elf_fix_symbol_flags. */
1090 bfd_boolean (*elf_backend_fixup_symbol
)
1091 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
1093 /* Merge the backend specific symbol attribute. */
1094 void (*elf_backend_merge_symbol_attribute
)
1095 (struct elf_link_hash_entry
*, const Elf_Internal_Sym
*, bfd_boolean
,
1098 /* This function, if defined, will return a string containing the
1099 name of a target-specific dynamic tag. */
1100 char *(*elf_backend_get_target_dtag
)
1103 /* Decide whether an undefined symbol is special and can be ignored.
1104 This is the case for OPTIONAL symbols on IRIX. */
1105 bfd_boolean (*elf_backend_ignore_undef_symbol
)
1106 (struct elf_link_hash_entry
*);
1108 /* Emit relocations. Overrides default routine for emitting relocs,
1109 except during a relocatable link, or if all relocs are being emitted. */
1110 bfd_boolean (*elf_backend_emit_relocs
)
1111 (bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*,
1112 struct elf_link_hash_entry
**);
1114 /* Count relocations. Not called for relocatable links
1115 or if all relocs are being preserved in the output. */
1116 unsigned int (*elf_backend_count_relocs
)
1117 (struct bfd_link_info
*, asection
*);
1119 /* Say whether to sort relocs output by ld -r and ld --emit-relocs,
1120 by r_offset. If NULL, default to true. */
1121 bfd_boolean (*sort_relocs_p
)
1124 /* This function, if defined, is called when an NT_PRSTATUS note is found
1126 bfd_boolean (*elf_backend_grok_prstatus
)
1127 (bfd
*, Elf_Internal_Note
*);
1129 /* This function, if defined, is called when an NT_PSINFO or NT_PRPSINFO
1130 note is found in a core file. */
1131 bfd_boolean (*elf_backend_grok_psinfo
)
1132 (bfd
*, Elf_Internal_Note
*);
1134 /* This function, if defined, is called to write a note to a corefile. */
1135 char *(*elf_backend_write_core_note
)
1136 (bfd
*abfd
, char *buf
, int *bufsiz
, int note_type
, ...);
1138 /* This function, if defined, is called to convert target-specific
1139 section flag names into hex values. */
1140 flagword (*elf_backend_lookup_section_flags_hook
)
1143 /* This function returns class of a reloc type. */
1144 enum elf_reloc_type_class (*elf_backend_reloc_type_class
)
1145 (const struct bfd_link_info
*, const asection
*, const Elf_Internal_Rela
*);
1147 /* This function, if defined, removes information about discarded functions
1148 from other sections which mention them. */
1149 bfd_boolean (*elf_backend_discard_info
)
1150 (bfd
*, struct elf_reloc_cookie
*, struct bfd_link_info
*);
1152 /* This function, if defined, signals that the function above has removed
1153 the discarded relocations for this section. */
1154 bfd_boolean (*elf_backend_ignore_discarded_relocs
)
1157 /* What to do when ld finds relocations against symbols defined in
1158 discarded sections. */
1159 unsigned int (*action_discarded
)
1162 /* This function returns the width of FDE pointers in bytes, or 0 if
1163 that can't be determined for some reason. The default definition
1164 goes by the bfd's EI_CLASS. */
1165 unsigned int (*elf_backend_eh_frame_address_size
)
1166 (bfd
*, asection
*);
1168 /* These functions tell elf-eh-frame whether to attempt to turn
1169 absolute or lsda encodings into pc-relative ones. The default
1170 definition enables these transformations. */
1171 bfd_boolean (*elf_backend_can_make_relative_eh_frame
)
1172 (bfd
*, struct bfd_link_info
*, asection
*);
1173 bfd_boolean (*elf_backend_can_make_lsda_relative_eh_frame
)
1174 (bfd
*, struct bfd_link_info
*, asection
*);
1176 /* This function returns an encoding after computing the encoded
1177 value (and storing it in ENCODED) for the given OFFSET into OSEC,
1178 to be stored in at LOC_OFFSET into the LOC_SEC input section.
1179 The default definition chooses a 32-bit PC-relative encoding. */
1180 bfd_byte (*elf_backend_encode_eh_address
)
1181 (bfd
*abfd
, struct bfd_link_info
*info
,
1182 asection
*osec
, bfd_vma offset
,
1183 asection
*loc_sec
, bfd_vma loc_offset
,
1186 /* This function, if defined, may write out the given section.
1187 Returns TRUE if it did so and FALSE if the caller should. */
1188 bfd_boolean (*elf_backend_write_section
)
1189 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
1191 /* The level of IRIX compatibility we're striving for.
1192 MIPS ELF specific function. */
1193 irix_compat_t (*elf_backend_mips_irix_compat
)
1196 reloc_howto_type
*(*elf_backend_mips_rtype_to_howto
)
1197 (unsigned int, bfd_boolean
);
1199 /* The swapping table to use when dealing with ECOFF information.
1200 Used for the MIPS ELF .mdebug section. */
1201 const struct ecoff_debug_swap
*elf_backend_ecoff_debug_swap
;
1203 /* This function implements `bfd_elf_bfd_from_remote_memory';
1204 see elf.c, elfcode.h. */
1205 bfd
*(*elf_backend_bfd_from_remote_memory
)
1206 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
1207 int (*target_read_memory
) (bfd_vma vma
, bfd_byte
*myaddr
,
1208 bfd_size_type len
));
1210 /* This function is used by `_bfd_elf_get_synthetic_symtab';
1212 bfd_vma (*plt_sym_val
) (bfd_vma
, const asection
*, const arelent
*);
1214 /* Is symbol defined in common section? */
1215 bfd_boolean (*common_definition
) (Elf_Internal_Sym
*);
1217 /* Return a common section index for section. */
1218 unsigned int (*common_section_index
) (asection
*);
1220 /* Return a common section for section. */
1221 asection
*(*common_section
) (asection
*);
1223 /* Return TRUE if we can merge 2 definitions. */
1224 bfd_boolean (*merge_symbol
) (struct elf_link_hash_entry
*,
1225 const Elf_Internal_Sym
*, asection
**,
1226 bfd_boolean
, bfd_boolean
,
1227 bfd
*, const asection
*);
1229 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
1230 bfd_boolean (*elf_hash_symbol
) (struct elf_link_hash_entry
*);
1232 /* Return TRUE if type is a function symbol type. */
1233 bfd_boolean (*is_function_type
) (unsigned int type
);
1235 /* If the ELF symbol SYM might be a function in SEC, return the
1236 function size and set *CODE_OFF to the function's entry point,
1237 otherwise return zero. */
1238 bfd_size_type (*maybe_function_sym
) (const asymbol
*sym
, asection
*sec
,
1241 /* Used to handle bad SHF_LINK_ORDER input. */
1242 bfd_error_handler_type link_order_error_handler
;
1244 /* Name of the PLT relocation section. */
1245 const char *relplt_name
;
1247 /* Alternate EM_xxxx machine codes for this backend. */
1248 int elf_machine_alt1
;
1249 int elf_machine_alt2
;
1251 const struct elf_size_info
*s
;
1253 /* An array of target specific special sections. */
1254 const struct bfd_elf_special_section
*special_sections
;
1256 /* The size in bytes of the header for the GOT. This includes the
1257 so-called reserved entries on some systems. */
1258 bfd_vma got_header_size
;
1260 /* The size of the GOT entry for the symbol pointed to by H if non-NULL,
1261 otherwise by the local symbol with index SYMNDX in IBFD. */
1262 bfd_vma (*got_elt_size
) (bfd
*, struct bfd_link_info
*,
1263 struct elf_link_hash_entry
*h
,
1264 bfd
*ibfd
, unsigned long symndx
);
1266 /* The vendor name to use for a processor-standard attributes section. */
1267 const char *obj_attrs_vendor
;
1269 /* The section name to use for a processor-standard attributes section. */
1270 const char *obj_attrs_section
;
1272 /* Return 1, 2 or 3 to indicate what type of arguments a
1273 processor-specific tag takes. */
1274 int (*obj_attrs_arg_type
) (int);
1276 /* The section type to use for an attributes section. */
1277 unsigned int obj_attrs_section_type
;
1279 /* This function determines the order in which any attributes are
1280 written. It must be defined for input in the range
1281 LEAST_KNOWN_OBJ_ATTRIBUTE..NUM_KNOWN_OBJ_ATTRIBUTES-1 (this range
1282 is used in order to make unity easy). The returned value is the
1283 actual tag number to place in the input position. */
1284 int (*obj_attrs_order
) (int);
1286 /* Handle merging unknown attributes; either warn and return TRUE,
1287 or give an error and return FALSE. */
1288 bfd_boolean (*obj_attrs_handle_unknown
) (bfd
*, int);
1290 /* This is non-zero if static TLS segments require a special alignment. */
1291 unsigned static_tls_alignment
;
1293 /* Alignment for the PT_GNU_STACK segment. */
1294 unsigned stack_align
;
1296 /* This is TRUE if the linker should act like collect and gather
1297 global constructors and destructors by name. This is TRUE for
1298 MIPS ELF because the Irix 5 tools can not handle the .init
1300 unsigned collect
: 1;
1302 /* This is TRUE if the linker should ignore changes to the type of a
1303 symbol. This is TRUE for MIPS ELF because some Irix 5 objects
1304 record undefined functions as STT_OBJECT although the definitions
1306 unsigned type_change_ok
: 1;
1308 /* Whether the backend may use REL relocations. (Some backends use
1309 both REL and RELA relocations, and this flag is set for those
1311 unsigned may_use_rel_p
: 1;
1313 /* Whether the backend may use RELA relocations. (Some backends use
1314 both REL and RELA relocations, and this flag is set for those
1316 unsigned may_use_rela_p
: 1;
1318 /* Whether the default relocation type is RELA. If a backend with
1319 this flag set wants REL relocations for a particular section,
1320 it must note that explicitly. Similarly, if this flag is clear,
1321 and the backend wants RELA relocations for a particular
1323 unsigned default_use_rela_p
: 1;
1325 /* True if PLT and copy relocations should be RELA by default. */
1326 unsigned rela_plts_and_copies_p
: 1;
1328 /* Set if RELA relocations for a relocatable link can be handled by
1329 generic code. Backends that set this flag need do nothing in the
1330 backend relocate_section routine for relocatable linking. */
1331 unsigned rela_normal
: 1;
1333 /* TRUE if addresses "naturally" sign extend. This is used when
1334 swapping in from Elf32 when BFD64. */
1335 unsigned sign_extend_vma
: 1;
1337 unsigned want_got_plt
: 1;
1338 unsigned plt_readonly
: 1;
1339 unsigned want_plt_sym
: 1;
1340 unsigned plt_not_loaded
: 1;
1341 unsigned plt_alignment
: 4;
1342 unsigned can_gc_sections
: 1;
1343 unsigned can_refcount
: 1;
1344 unsigned want_got_sym
: 1;
1345 unsigned want_dynbss
: 1;
1347 /* Targets which do not support physical addressing often require
1348 that the p_paddr field in the section header to be set to zero.
1349 This field indicates whether this behavior is required. */
1350 unsigned want_p_paddr_set_to_zero
: 1;
1352 /* True if an object file lacking a .note.GNU-stack section
1353 should be assumed to be requesting exec stack. At least one
1354 other file in the link needs to have a .note.GNU-stack section
1355 for a PT_GNU_STACK segment to be created. */
1356 unsigned default_execstack
: 1;
1358 /* True if elf_section_data(sec)->this_hdr.contents is sec->rawsize
1359 in length rather than sec->size in length, if sec->rawsize is
1360 non-zero and smaller than sec->size. */
1361 unsigned caches_rawsize
: 1;
1364 /* Information about reloc sections associated with a bfd_elf_section_data
1366 struct bfd_elf_section_reloc_data
1368 /* The ELF header for the reloc section associated with this
1370 Elf_Internal_Shdr
*hdr
;
1371 /* The number of relocations currently assigned to HDR. */
1373 /* The ELF section number of the reloc section. Only used for an
1376 /* Used by the backend linker to store the symbol hash table entries
1377 associated with relocs against global symbols. */
1378 struct elf_link_hash_entry
**hashes
;
1381 /* Information stored for each BFD section in an ELF file. This
1382 structure is allocated by elf_new_section_hook. */
1384 struct bfd_elf_section_data
1386 /* The ELF header for this section. */
1387 Elf_Internal_Shdr this_hdr
;
1389 /* INPUT_SECTION_FLAGS if specified in the linker script. */
1390 struct flag_info
*section_flag_info
;
1392 /* Information about the REL and RELA reloc sections associated
1393 with this section, if any. */
1394 struct bfd_elf_section_reloc_data rel
, rela
;
1396 /* The ELF section number of this section. */
1399 /* Used by the backend linker when generating a shared library to
1400 record the dynamic symbol index for a section symbol
1401 corresponding to this section. A value of 0 means that there is
1402 no dynamic symbol for this section. */
1405 /* A pointer to the linked-to section for SHF_LINK_ORDER. */
1406 asection
*linked_to
;
1408 /* A pointer to the swapped relocs. If the section uses REL relocs,
1409 rather than RELA, all the r_addend fields will be zero. This
1410 pointer may be NULL. It is used by the backend linker. */
1411 Elf_Internal_Rela
*relocs
;
1413 /* A pointer to a linked list tracking dynamic relocs copied for
1417 /* A pointer to the bfd section used for dynamic relocs. */
1421 /* Group name, if this section is a member of a group. */
1424 /* Group signature sym, if this is the SHT_GROUP section. */
1425 struct bfd_symbol
*id
;
1428 /* For a member of a group, points to the SHT_GROUP section.
1429 NULL for the SHT_GROUP section itself and non-group sections. */
1430 asection
*sec_group
;
1432 /* A linked list of member sections in the group. Circular when used by
1433 the linker. For the SHT_GROUP section, points at first member. */
1434 asection
*next_in_group
;
1436 /* The FDEs associated with this section. The u.fde.next_in_section
1437 field acts as a chain pointer. */
1438 struct eh_cie_fde
*fde_list
;
1440 /* A pointer used for various section optimizations. */
1444 #define elf_section_data(sec) ((struct bfd_elf_section_data*)(sec)->used_by_bfd)
1445 #define elf_linked_to_section(sec) (elf_section_data(sec)->linked_to)
1446 #define elf_section_type(sec) (elf_section_data(sec)->this_hdr.sh_type)
1447 #define elf_section_flags(sec) (elf_section_data(sec)->this_hdr.sh_flags)
1448 #define elf_group_name(sec) (elf_section_data(sec)->group.name)
1449 #define elf_group_id(sec) (elf_section_data(sec)->group.id)
1450 #define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group)
1451 #define elf_fde_list(sec) (elf_section_data(sec)->fde_list)
1452 #define elf_sec_group(sec) (elf_section_data(sec)->sec_group)
1454 #define xvec_get_elf_backend_data(xvec) \
1455 ((const struct elf_backend_data *) (xvec)->backend_data)
1457 #define get_elf_backend_data(abfd) \
1458 xvec_get_elf_backend_data ((abfd)->xvec)
1460 /* The least object attributes (within an attributes subsection) known
1461 for any target. Some code assumes that the value 0 is not used and
1462 the field for that attribute can instead be used as a marker to
1463 indicate that attributes have been initialized. */
1464 #define LEAST_KNOWN_OBJ_ATTRIBUTE 2
1466 /* The maximum number of known object attributes for any target. */
1467 #define NUM_KNOWN_OBJ_ATTRIBUTES 71
1469 /* The value of an object attribute. The type indicates whether the attribute
1470 holds and integer, a string, or both. It can also indicate that there can
1471 be no default (i.e. all values must be written to file, even zero). */
1473 typedef struct obj_attribute
1475 #define ATTR_TYPE_FLAG_INT_VAL (1 << 0)
1476 #define ATTR_TYPE_FLAG_STR_VAL (1 << 1)
1477 #define ATTR_TYPE_FLAG_NO_DEFAULT (1 << 2)
1479 #define ATTR_TYPE_HAS_INT_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_INT_VAL)
1480 #define ATTR_TYPE_HAS_STR_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_STR_VAL)
1481 #define ATTR_TYPE_HAS_NO_DEFAULT(TYPE) ((TYPE) & ATTR_TYPE_FLAG_NO_DEFAULT)
1488 typedef struct obj_attribute_list
1490 struct obj_attribute_list
*next
;
1493 } obj_attribute_list
;
1495 /* Object attributes may either be defined by the processor ABI, index
1496 OBJ_ATTR_PROC in the *_obj_attributes arrays, or be GNU-specific
1497 (and possibly also processor-specific), index OBJ_ATTR_GNU. */
1498 #define OBJ_ATTR_PROC 0
1499 #define OBJ_ATTR_GNU 1
1500 #define OBJ_ATTR_FIRST OBJ_ATTR_PROC
1501 #define OBJ_ATTR_LAST OBJ_ATTR_GNU
1503 /* The following object attribute tags are taken as generic, for all
1504 targets and for "gnu" where there is no target standard. */
1511 Tag_compatibility
= 32
1514 /* The following struct stores information about every SystemTap section
1515 found in the object file. */
1518 struct sdt_note
*next
;
1523 /* NT_GNU_BUILD_ID note type info for input BFDs. */
1530 /* tdata information grabbed from an elf core file. */
1531 struct core_elf_obj_tdata
1540 /* Extra tdata information held for output ELF BFDs. */
1541 struct output_elf_obj_tdata
1543 struct elf_segment_map
*seg_map
;
1544 struct elf_strtab_hash
*strtab_ptr
;
1546 /* STT_SECTION symbols for each section */
1547 asymbol
**section_syms
;
1549 /* Used to determine if PT_GNU_EH_FRAME segment header should be
1551 asection
*eh_frame_hdr
;
1553 /* NT_GNU_BUILD_ID note type info. */
1556 bfd_boolean (*after_write_object_contents
) (bfd
*);
1561 /* Records the result of `get_program_header_size'. */
1562 bfd_size_type program_header_size
;
1564 /* Used when laying out sections. */
1565 file_ptr next_file_pos
;
1567 int num_section_syms
;
1568 unsigned int shstrtab_section
, strtab_section
;
1570 /* Segment flags for the PT_GNU_STACK segment. */
1571 unsigned int stack_flags
;
1573 /* This is set to TRUE if the object was created by the backend
1577 /* Used to determine if the e_flags field has been initialized */
1578 bfd_boolean flags_init
;
1581 /* Some private data is stashed away for future use using the tdata pointer
1582 in the bfd structure. */
1584 struct elf_obj_tdata
1586 Elf_Internal_Ehdr elf_header
[1]; /* Actual data, but ref like ptr */
1587 Elf_Internal_Shdr
**elf_sect_ptr
;
1588 Elf_Internal_Phdr
*phdr
;
1589 Elf_Internal_Shdr symtab_hdr
;
1590 Elf_Internal_Shdr shstrtab_hdr
;
1591 Elf_Internal_Shdr strtab_hdr
;
1592 Elf_Internal_Shdr dynsymtab_hdr
;
1593 Elf_Internal_Shdr dynstrtab_hdr
;
1594 Elf_Internal_Shdr dynversym_hdr
;
1595 Elf_Internal_Shdr dynverref_hdr
;
1596 Elf_Internal_Shdr dynverdef_hdr
;
1597 Elf_Internal_Shdr symtab_shndx_hdr
;
1598 bfd_vma gp
; /* The gp value */
1599 unsigned int gp_size
; /* The gp size */
1600 unsigned int num_elf_sections
; /* elf_sect_ptr size */
1602 /* A mapping from external symbols to entries in the linker hash
1603 table, used when linking. This is indexed by the symbol index
1604 minus the sh_info field of the symbol table header. */
1605 struct elf_link_hash_entry
**sym_hashes
;
1607 /* Track usage and final offsets of GOT entries for local symbols.
1608 This array is indexed by symbol index. Elements are used
1609 identically to "got" in struct elf_link_hash_entry. */
1612 bfd_signed_vma
*refcounts
;
1614 struct got_entry
**ents
;
1617 /* The linker ELF emulation code needs to let the backend ELF linker
1618 know what filename should be used for a dynamic object if the
1619 dynamic object is found using a search. The emulation code then
1620 sometimes needs to know what name was actually used. Until the
1621 file has been added to the linker symbol table, this field holds
1622 the name the linker wants. After it has been added, it holds the
1623 name actually used, which will be the DT_SONAME entry if there is
1625 const char *dt_name
;
1627 /* The linker emulation needs to know what audit libs
1628 are used by a dynamic object. */
1629 const char *dt_audit
;
1631 /* Used by find_nearest_line entry point. */
1634 /* A place to stash dwarf1 info for this bfd. */
1635 struct dwarf1_debug
*dwarf1_find_line_info
;
1637 /* A place to stash dwarf2 info for this bfd. */
1638 void *dwarf2_find_line_info
;
1640 /* Stash away info for yet another find line/function variant. */
1641 void *elf_find_function_cache
;
1643 /* Number of symbol version definitions we are about to emit. */
1644 unsigned int cverdefs
;
1646 /* Number of symbol version references we are about to emit. */
1647 unsigned int cverrefs
;
1649 /* Symbol version definitions in external objects. */
1650 Elf_Internal_Verdef
*verdef
;
1652 /* Symbol version references to external objects. */
1653 Elf_Internal_Verneed
*verref
;
1655 /* A pointer to the .eh_frame section. */
1656 asection
*eh_frame_section
;
1658 /* Symbol buffer. */
1661 obj_attribute known_obj_attributes
[2][NUM_KNOWN_OBJ_ATTRIBUTES
];
1662 obj_attribute_list
*other_obj_attributes
[2];
1664 /* NT_GNU_BUILD_ID note type. */
1665 struct elf_build_id
*build_id
;
1667 /* Linked-list containing information about every Systemtap section
1668 found in the object file. Each section corresponds to one entry
1670 struct sdt_note
*sdt_note_head
;
1672 Elf_Internal_Shdr
**group_sect_ptr
;
1675 unsigned int symtab_section
, symtab_shndx_section
, dynsymtab_section
;
1676 unsigned int dynversym_section
, dynverdef_section
, dynverref_section
;
1678 /* An identifier used to distinguish different target
1679 specific extensions to this structure. */
1680 enum elf_target_id object_id
;
1682 /* Whether a dyanmic object was specified normally on the linker
1683 command line, or was specified when --as-needed was in effect,
1684 or was found via a DT_NEEDED entry. */
1685 enum dynamic_lib_link_class dyn_lib_class
;
1687 /* Irix 5 often screws up the symbol table, sorting local symbols
1688 after global symbols. This flag is set if the symbol table in
1689 this BFD appears to be screwed up. If it is, we ignore the
1690 sh_info field in the symbol table header, and always read all the
1692 bfd_boolean bad_symtab
;
1694 /* True if the bfd contains symbols that have the STT_GNU_IFUNC
1695 symbol type or STB_GNU_UNIQUE binding. Used to set the osabi
1696 field in the ELF header structure. */
1697 bfd_boolean has_gnu_symbols
;
1699 /* Information grabbed from an elf core file. */
1700 struct core_elf_obj_tdata
*core
;
1702 /* More information held for output ELF BFDs. */
1703 struct output_elf_obj_tdata
*o
;
1706 #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
1708 #define elf_object_id(bfd) (elf_tdata(bfd) -> object_id)
1709 #define elf_program_header_size(bfd) (elf_tdata(bfd) -> o->program_header_size)
1710 #define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header)
1711 #define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr)
1712 #define elf_numsections(bfd) (elf_tdata(bfd) -> num_elf_sections)
1713 #define elf_seg_map(bfd) (elf_tdata(bfd) -> o->seg_map)
1714 #define elf_next_file_pos(bfd) (elf_tdata(bfd) -> o->next_file_pos)
1715 #define elf_eh_frame_hdr(bfd) (elf_tdata(bfd) -> o->eh_frame_hdr)
1716 #define elf_linker(bfd) (elf_tdata(bfd) -> o->linker)
1717 #define elf_stack_flags(bfd) (elf_tdata(bfd) -> o->stack_flags)
1718 #define elf_shstrtab(bfd) (elf_tdata(bfd) -> o->strtab_ptr)
1719 #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section)
1720 #define elf_symtab_shndx(bfd) (elf_tdata(bfd) -> symtab_shndx_section)
1721 #define elf_strtab_sec(bfd) (elf_tdata(bfd) -> o->strtab_section)
1722 #define elf_shstrtab_sec(bfd) (elf_tdata(bfd) -> o->shstrtab_section)
1723 #define elf_symtab_hdr(bfd) (elf_tdata(bfd) -> symtab_hdr)
1724 #define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section)
1725 #define elf_dynversym(bfd) (elf_tdata(bfd) -> dynversym_section)
1726 #define elf_dynverdef(bfd) (elf_tdata(bfd) -> dynverdef_section)
1727 #define elf_dynverref(bfd) (elf_tdata(bfd) -> dynverref_section)
1728 #define elf_eh_frame_section(bfd) \
1729 (elf_tdata(bfd) -> eh_frame_section)
1730 #define elf_section_syms(bfd) (elf_tdata(bfd) -> o->section_syms)
1731 #define elf_num_section_syms(bfd) (elf_tdata(bfd) -> o->num_section_syms)
1732 #define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
1733 #define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
1734 #define elf_gp(bfd) (elf_tdata(bfd) -> gp)
1735 #define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size)
1736 #define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes)
1737 #define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts)
1738 #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets)
1739 #define elf_local_got_ents(bfd) (elf_tdata(bfd) -> local_got.ents)
1740 #define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name)
1741 #define elf_dt_audit(bfd) (elf_tdata(bfd) -> dt_audit)
1742 #define elf_dyn_lib_class(bfd) (elf_tdata(bfd) -> dyn_lib_class)
1743 #define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab)
1744 #define elf_flags_init(bfd) (elf_tdata(bfd) -> o->flags_init)
1745 #define elf_known_obj_attributes(bfd) (elf_tdata (bfd) -> known_obj_attributes)
1746 #define elf_other_obj_attributes(bfd) (elf_tdata (bfd) -> other_obj_attributes)
1747 #define elf_known_obj_attributes_proc(bfd) \
1748 (elf_known_obj_attributes (bfd) [OBJ_ATTR_PROC])
1749 #define elf_other_obj_attributes_proc(bfd) \
1750 (elf_other_obj_attributes (bfd) [OBJ_ATTR_PROC])
1752 extern void _bfd_elf_swap_verdef_in
1753 (bfd
*, const Elf_External_Verdef
*, Elf_Internal_Verdef
*);
1754 extern void _bfd_elf_swap_verdef_out
1755 (bfd
*, const Elf_Internal_Verdef
*, Elf_External_Verdef
*);
1756 extern void _bfd_elf_swap_verdaux_in
1757 (bfd
*, const Elf_External_Verdaux
*, Elf_Internal_Verdaux
*);
1758 extern void _bfd_elf_swap_verdaux_out
1759 (bfd
*, const Elf_Internal_Verdaux
*, Elf_External_Verdaux
*);
1760 extern void _bfd_elf_swap_verneed_in
1761 (bfd
*, const Elf_External_Verneed
*, Elf_Internal_Verneed
*);
1762 extern void _bfd_elf_swap_verneed_out
1763 (bfd
*, const Elf_Internal_Verneed
*, Elf_External_Verneed
*);
1764 extern void _bfd_elf_swap_vernaux_in
1765 (bfd
*, const Elf_External_Vernaux
*, Elf_Internal_Vernaux
*);
1766 extern void _bfd_elf_swap_vernaux_out
1767 (bfd
*, const Elf_Internal_Vernaux
*, Elf_External_Vernaux
*);
1768 extern void _bfd_elf_swap_versym_in
1769 (bfd
*, const Elf_External_Versym
*, Elf_Internal_Versym
*);
1770 extern void _bfd_elf_swap_versym_out
1771 (bfd
*, const Elf_Internal_Versym
*, Elf_External_Versym
*);
1773 extern unsigned int _bfd_elf_section_from_bfd_section
1774 (bfd
*, asection
*);
1775 extern char *bfd_elf_string_from_elf_section
1776 (bfd
*, unsigned, unsigned);
1777 extern Elf_Internal_Sym
*bfd_elf_get_elf_syms
1778 (bfd
*, Elf_Internal_Shdr
*, size_t, size_t, Elf_Internal_Sym
*, void *,
1779 Elf_External_Sym_Shndx
*);
1780 extern const char *bfd_elf_sym_name
1781 (bfd
*, Elf_Internal_Shdr
*, Elf_Internal_Sym
*, asection
*);
1783 extern bfd_boolean _bfd_elf_copy_private_bfd_data
1785 extern bfd_boolean _bfd_elf_print_private_bfd_data
1787 const char * _bfd_elf_get_symbol_version_string
1788 (bfd
*, asymbol
*, bfd_boolean
*);
1789 extern void bfd_elf_print_symbol
1790 (bfd
*, void *, asymbol
*, bfd_print_symbol_type
);
1792 extern unsigned int _bfd_elf_eh_frame_address_size
1793 (bfd
*, asection
*);
1794 extern bfd_byte _bfd_elf_encode_eh_address
1795 (bfd
*abfd
, struct bfd_link_info
*info
, asection
*osec
, bfd_vma offset
,
1796 asection
*loc_sec
, bfd_vma loc_offset
, bfd_vma
*encoded
);
1797 extern bfd_boolean _bfd_elf_can_make_relative
1798 (bfd
*input_bfd
, struct bfd_link_info
*info
, asection
*eh_frame_section
);
1800 extern enum elf_reloc_type_class _bfd_elf_reloc_type_class
1801 (const struct bfd_link_info
*, const asection
*,
1802 const Elf_Internal_Rela
*);
1803 extern bfd_vma _bfd_elf_rela_local_sym
1804 (bfd
*, Elf_Internal_Sym
*, asection
**, Elf_Internal_Rela
*);
1805 extern bfd_vma _bfd_elf_rel_local_sym
1806 (bfd
*, Elf_Internal_Sym
*, asection
**, bfd_vma
);
1807 extern bfd_vma _bfd_elf_section_offset
1808 (bfd
*, struct bfd_link_info
*, asection
*, bfd_vma
);
1810 extern unsigned long bfd_elf_hash
1812 extern unsigned long bfd_elf_gnu_hash
1815 extern bfd_reloc_status_type bfd_elf_generic_reloc
1816 (bfd
*, arelent
*, asymbol
*, void *, asection
*, bfd
*, char **);
1817 extern bfd_boolean bfd_elf_allocate_object
1818 (bfd
*, size_t, enum elf_target_id
);
1819 extern bfd_boolean bfd_elf_make_object
1821 extern bfd_boolean bfd_elf_mkcorefile
1823 extern bfd_boolean _bfd_elf_make_section_from_shdr
1824 (bfd
*, Elf_Internal_Shdr
*, const char *, int);
1825 extern bfd_boolean _bfd_elf_make_section_from_phdr
1826 (bfd
*, Elf_Internal_Phdr
*, int, const char *);
1827 extern struct bfd_hash_entry
*_bfd_elf_link_hash_newfunc
1828 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *);
1829 extern struct bfd_link_hash_table
*_bfd_elf_link_hash_table_create
1831 extern void _bfd_elf_link_hash_table_free
1833 extern void _bfd_elf_link_hash_copy_indirect
1834 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
1835 struct elf_link_hash_entry
*);
1836 extern void _bfd_elf_link_hash_hide_symbol
1837 (struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd_boolean
);
1838 extern bfd_boolean _bfd_elf_link_hash_fixup_symbol
1839 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
1840 extern bfd_boolean _bfd_elf_link_hash_table_init
1841 (struct elf_link_hash_table
*, bfd
*,
1842 struct bfd_hash_entry
*(*)
1843 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *),
1844 unsigned int, enum elf_target_id
);
1845 extern bfd_boolean _bfd_elf_slurp_version_tables
1846 (bfd
*, bfd_boolean
);
1847 extern bfd_boolean _bfd_elf_merge_sections
1848 (bfd
*, struct bfd_link_info
*);
1849 extern bfd_boolean _bfd_elf_match_sections_by_type
1850 (bfd
*, const asection
*, bfd
*, const asection
*);
1851 extern bfd_boolean bfd_elf_is_group_section
1852 (bfd
*, const struct bfd_section
*);
1853 extern bfd_boolean _bfd_elf_section_already_linked
1854 (bfd
*, asection
*, struct bfd_link_info
*);
1855 extern void bfd_elf_set_group_contents
1856 (bfd
*, asection
*, void *);
1857 extern asection
*_bfd_elf_check_kept_section
1858 (asection
*, struct bfd_link_info
*);
1859 #define _bfd_elf_link_just_syms _bfd_generic_link_just_syms
1860 extern void _bfd_elf_copy_link_hash_symbol_type
1861 (bfd
*, struct bfd_link_hash_entry
*, struct bfd_link_hash_entry
*);
1862 extern bfd_boolean _bfd_elf_size_group_sections
1863 (struct bfd_link_info
*);
1864 extern bfd_boolean _bfd_elf_fixup_group_sections
1865 (bfd
*, asection
*);
1866 extern bfd_boolean _bfd_elf_copy_private_header_data
1868 extern bfd_boolean _bfd_elf_copy_private_symbol_data
1869 (bfd
*, asymbol
*, bfd
*, asymbol
*);
1870 #define _bfd_generic_init_private_section_data \
1871 _bfd_elf_init_private_section_data
1872 extern bfd_boolean _bfd_elf_init_private_section_data
1873 (bfd
*, asection
*, bfd
*, asection
*, struct bfd_link_info
*);
1874 extern bfd_boolean _bfd_elf_copy_private_section_data
1875 (bfd
*, asection
*, bfd
*, asection
*);
1876 extern bfd_boolean _bfd_elf_write_object_contents
1878 extern bfd_boolean _bfd_elf_write_corefile_contents
1880 extern bfd_boolean _bfd_elf_set_section_contents
1881 (bfd
*, sec_ptr
, const void *, file_ptr
, bfd_size_type
);
1882 extern long _bfd_elf_get_symtab_upper_bound
1884 extern long _bfd_elf_canonicalize_symtab
1885 (bfd
*, asymbol
**);
1886 extern long _bfd_elf_get_dynamic_symtab_upper_bound
1888 extern long _bfd_elf_canonicalize_dynamic_symtab
1889 (bfd
*, asymbol
**);
1890 extern long _bfd_elf_get_synthetic_symtab
1891 (bfd
*, long, asymbol
**, long, asymbol
**, asymbol
**);
1892 extern long _bfd_elf_get_reloc_upper_bound
1894 extern long _bfd_elf_canonicalize_reloc
1895 (bfd
*, sec_ptr
, arelent
**, asymbol
**);
1896 extern asection
* _bfd_elf_get_dynamic_reloc_section
1897 (bfd
*, asection
*, bfd_boolean
);
1898 extern asection
* _bfd_elf_make_dynamic_reloc_section
1899 (asection
*, bfd
*, unsigned int, bfd
*, bfd_boolean
);
1900 extern long _bfd_elf_get_dynamic_reloc_upper_bound
1902 extern long _bfd_elf_canonicalize_dynamic_reloc
1903 (bfd
*, arelent
**, asymbol
**);
1904 extern asymbol
*_bfd_elf_make_empty_symbol
1906 extern void _bfd_elf_get_symbol_info
1907 (bfd
*, asymbol
*, symbol_info
*);
1908 extern bfd_boolean _bfd_elf_is_local_label_name
1909 (bfd
*, const char *);
1910 extern alent
*_bfd_elf_get_lineno
1912 extern bfd_boolean _bfd_elf_set_arch_mach
1913 (bfd
*, enum bfd_architecture
, unsigned long);
1914 extern bfd_boolean _bfd_elf_find_nearest_line
1915 (bfd
*, asymbol
**, asection
*, bfd_vma
,
1916 const char **, const char **, unsigned int *, unsigned int *);
1917 extern bfd_boolean _bfd_elf_find_line
1918 (bfd
*, asymbol
**, asymbol
*, const char **, unsigned int *);
1919 extern bfd_boolean _bfd_elf_find_inliner_info
1920 (bfd
*, const char **, const char **, unsigned int *);
1921 extern bfd_boolean _bfd_elf_find_function
1922 (bfd
*, asymbol
**, asection
*, bfd_vma
, const char **, const char **);
1923 #define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols
1924 #define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
1925 extern int _bfd_elf_sizeof_headers
1926 (bfd
*, struct bfd_link_info
*);
1927 extern bfd_boolean _bfd_elf_new_section_hook
1928 (bfd
*, asection
*);
1929 extern const struct bfd_elf_special_section
*_bfd_elf_get_special_section
1930 (const char *, const struct bfd_elf_special_section
*, unsigned int);
1931 extern const struct bfd_elf_special_section
*_bfd_elf_get_sec_type_attr
1932 (bfd
*, asection
*);
1934 /* If the target doesn't have reloc handling written yet: */
1935 extern void _bfd_elf_no_info_to_howto
1936 (bfd
*, arelent
*, Elf_Internal_Rela
*);
1938 extern bfd_boolean bfd_section_from_shdr
1939 (bfd
*, unsigned int shindex
);
1940 extern bfd_boolean bfd_section_from_phdr
1941 (bfd
*, Elf_Internal_Phdr
*, int);
1943 extern int _bfd_elf_symbol_from_bfd_symbol
1944 (bfd
*, asymbol
**);
1946 extern Elf_Internal_Sym
*bfd_sym_from_r_symndx
1947 (struct sym_cache
*, bfd
*, unsigned long);
1948 extern asection
*bfd_section_from_elf_index
1949 (bfd
*, unsigned int);
1950 extern struct bfd_strtab_hash
*_bfd_elf_stringtab_init
1953 extern struct elf_strtab_hash
* _bfd_elf_strtab_init
1955 extern void _bfd_elf_strtab_free
1956 (struct elf_strtab_hash
*);
1957 extern bfd_size_type _bfd_elf_strtab_add
1958 (struct elf_strtab_hash
*, const char *, bfd_boolean
);
1959 extern void _bfd_elf_strtab_addref
1960 (struct elf_strtab_hash
*, bfd_size_type
);
1961 extern void _bfd_elf_strtab_delref
1962 (struct elf_strtab_hash
*, bfd_size_type
);
1963 extern unsigned int _bfd_elf_strtab_refcount
1964 (struct elf_strtab_hash
*, bfd_size_type
);
1965 extern void _bfd_elf_strtab_clear_all_refs
1966 (struct elf_strtab_hash
*tab
);
1967 extern void _bfd_elf_strtab_restore_size
1968 (struct elf_strtab_hash
*, bfd_size_type
);
1969 extern bfd_size_type _bfd_elf_strtab_size
1970 (struct elf_strtab_hash
*);
1971 extern bfd_size_type _bfd_elf_strtab_offset
1972 (struct elf_strtab_hash
*, bfd_size_type
);
1973 extern bfd_boolean _bfd_elf_strtab_emit
1974 (bfd
*, struct elf_strtab_hash
*);
1975 extern void _bfd_elf_strtab_finalize
1976 (struct elf_strtab_hash
*);
1978 extern void _bfd_elf_parse_eh_frame
1979 (bfd
*, struct bfd_link_info
*, asection
*, struct elf_reloc_cookie
*);
1980 extern bfd_boolean _bfd_elf_discard_section_eh_frame
1981 (bfd
*, struct bfd_link_info
*, asection
*,
1982 bfd_boolean (*) (bfd_vma
, void *), struct elf_reloc_cookie
*);
1983 extern bfd_boolean _bfd_elf_discard_section_eh_frame_hdr
1984 (bfd
*, struct bfd_link_info
*);
1985 extern bfd_vma _bfd_elf_eh_frame_section_offset
1986 (bfd
*, struct bfd_link_info
*, asection
*, bfd_vma
);
1987 extern bfd_boolean _bfd_elf_write_section_eh_frame
1988 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
1989 extern bfd_boolean _bfd_elf_write_section_eh_frame_hdr
1990 (bfd
*, struct bfd_link_info
*);
1991 extern bfd_boolean _bfd_elf_eh_frame_present
1992 (struct bfd_link_info
*);
1993 extern bfd_boolean _bfd_elf_maybe_strip_eh_frame_hdr
1994 (struct bfd_link_info
*);
1996 extern bfd_boolean
_bfd_elf_hash_symbol (struct elf_link_hash_entry
*);
1998 extern long _bfd_elf_link_lookup_local_dynindx
1999 (struct bfd_link_info
*, bfd
*, long);
2000 extern bfd_boolean _bfd_elf_compute_section_file_positions
2001 (bfd
*, struct bfd_link_info
*);
2002 extern file_ptr _bfd_elf_assign_file_position_for_section
2003 (Elf_Internal_Shdr
*, file_ptr
, bfd_boolean
);
2005 extern bfd_boolean _bfd_elf_validate_reloc
2008 extern bfd_boolean _bfd_elf_link_create_dynamic_sections
2009 (bfd
*, struct bfd_link_info
*);
2010 extern bfd_boolean _bfd_elf_link_omit_section_dynsym
2011 (bfd
*, struct bfd_link_info
*, asection
*);
2012 extern bfd_boolean _bfd_elf_create_dynamic_sections
2013 (bfd
*, struct bfd_link_info
*);
2014 extern bfd_boolean _bfd_elf_create_got_section
2015 (bfd
*, struct bfd_link_info
*);
2016 extern struct elf_link_hash_entry
*_bfd_elf_define_linkage_sym
2017 (bfd
*, struct bfd_link_info
*, asection
*, const char *);
2018 extern void _bfd_elf_init_1_index_section
2019 (bfd
*, struct bfd_link_info
*);
2020 extern void _bfd_elf_init_2_index_sections
2021 (bfd
*, struct bfd_link_info
*);
2023 extern bfd_boolean _bfd_elfcore_make_pseudosection
2024 (bfd
*, char *, size_t, ufile_ptr
);
2025 extern char *_bfd_elfcore_strndup
2026 (bfd
*, char *, size_t);
2028 extern Elf_Internal_Rela
*_bfd_elf_link_read_relocs
2029 (bfd
*, asection
*, void *, Elf_Internal_Rela
*, bfd_boolean
);
2031 extern bfd_boolean _bfd_elf_link_output_relocs
2032 (bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*,
2033 struct elf_link_hash_entry
**);
2035 extern bfd_boolean _bfd_elf_adjust_dynamic_copy
2036 (struct bfd_link_info
*, struct elf_link_hash_entry
*, asection
*);
2038 extern bfd_boolean _bfd_elf_dynamic_symbol_p
2039 (struct elf_link_hash_entry
*, struct bfd_link_info
*, bfd_boolean
);
2041 extern bfd_boolean _bfd_elf_symbol_refs_local_p
2042 (struct elf_link_hash_entry
*, struct bfd_link_info
*, bfd_boolean
);
2044 extern bfd_reloc_status_type bfd_elf_perform_complex_relocation
2045 (bfd
*, asection
*, bfd_byte
*, Elf_Internal_Rela
*, bfd_vma
);
2047 extern bfd_boolean _bfd_elf_setup_sections
2050 extern void _bfd_elf_post_process_headers (bfd
* , struct bfd_link_info
*);
2052 extern const bfd_target
*bfd_elf32_object_p
2054 extern const bfd_target
*bfd_elf32_core_file_p
2056 extern char *bfd_elf32_core_file_failing_command
2058 extern int bfd_elf32_core_file_failing_signal
2060 extern bfd_boolean bfd_elf32_core_file_matches_executable_p
2062 extern int bfd_elf32_core_file_pid
2065 extern bfd_boolean bfd_elf32_swap_symbol_in
2066 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
2067 extern void bfd_elf32_swap_symbol_out
2068 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
2069 extern void bfd_elf32_swap_reloc_in
2070 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2071 extern void bfd_elf32_swap_reloc_out
2072 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2073 extern void bfd_elf32_swap_reloca_in
2074 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2075 extern void bfd_elf32_swap_reloca_out
2076 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2077 extern void bfd_elf32_swap_phdr_in
2078 (bfd
*, const Elf32_External_Phdr
*, Elf_Internal_Phdr
*);
2079 extern void bfd_elf32_swap_phdr_out
2080 (bfd
*, const Elf_Internal_Phdr
*, Elf32_External_Phdr
*);
2081 extern void bfd_elf32_swap_dyn_in
2082 (bfd
*, const void *, Elf_Internal_Dyn
*);
2083 extern void bfd_elf32_swap_dyn_out
2084 (bfd
*, const Elf_Internal_Dyn
*, void *);
2085 extern long bfd_elf32_slurp_symbol_table
2086 (bfd
*, asymbol
**, bfd_boolean
);
2087 extern bfd_boolean bfd_elf32_write_shdrs_and_ehdr
2089 extern int bfd_elf32_write_out_phdrs
2090 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
2091 extern bfd_boolean bfd_elf32_checksum_contents
2092 (bfd
* , void (*) (const void *, size_t, void *), void *);
2093 extern void bfd_elf32_write_relocs
2094 (bfd
*, asection
*, void *);
2095 extern bfd_boolean bfd_elf32_slurp_reloc_table
2096 (bfd
*, asection
*, asymbol
**, bfd_boolean
);
2098 extern const bfd_target
*bfd_elf64_object_p
2100 extern const bfd_target
*bfd_elf64_core_file_p
2102 extern char *bfd_elf64_core_file_failing_command
2104 extern int bfd_elf64_core_file_failing_signal
2106 extern bfd_boolean bfd_elf64_core_file_matches_executable_p
2108 extern int bfd_elf64_core_file_pid
2111 extern bfd_boolean bfd_elf64_swap_symbol_in
2112 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
2113 extern void bfd_elf64_swap_symbol_out
2114 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
2115 extern void bfd_elf64_swap_reloc_in
2116 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2117 extern void bfd_elf64_swap_reloc_out
2118 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2119 extern void bfd_elf64_swap_reloca_in
2120 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2121 extern void bfd_elf64_swap_reloca_out
2122 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2123 extern void bfd_elf64_swap_phdr_in
2124 (bfd
*, const Elf64_External_Phdr
*, Elf_Internal_Phdr
*);
2125 extern void bfd_elf64_swap_phdr_out
2126 (bfd
*, const Elf_Internal_Phdr
*, Elf64_External_Phdr
*);
2127 extern void bfd_elf64_swap_dyn_in
2128 (bfd
*, const void *, Elf_Internal_Dyn
*);
2129 extern void bfd_elf64_swap_dyn_out
2130 (bfd
*, const Elf_Internal_Dyn
*, void *);
2131 extern long bfd_elf64_slurp_symbol_table
2132 (bfd
*, asymbol
**, bfd_boolean
);
2133 extern bfd_boolean bfd_elf64_write_shdrs_and_ehdr
2135 extern int bfd_elf64_write_out_phdrs
2136 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
2137 extern bfd_boolean bfd_elf64_checksum_contents
2138 (bfd
* , void (*) (const void *, size_t, void *), void *);
2139 extern void bfd_elf64_write_relocs
2140 (bfd
*, asection
*, void *);
2141 extern bfd_boolean bfd_elf64_slurp_reloc_table
2142 (bfd
*, asection
*, asymbol
**, bfd_boolean
);
2144 extern bfd_boolean _bfd_elf_default_relocs_compatible
2145 (const bfd_target
*, const bfd_target
*);
2147 extern bfd_boolean _bfd_elf_relocs_compatible
2148 (const bfd_target
*, const bfd_target
*);
2149 extern bfd_boolean _bfd_elf_notice_as_needed
2150 (bfd
*, struct bfd_link_info
*, enum notice_asneeded_action
);
2152 extern struct elf_link_hash_entry
*_bfd_elf_archive_symbol_lookup
2153 (bfd
*, struct bfd_link_info
*, const char *);
2154 extern bfd_boolean bfd_elf_link_add_symbols
2155 (bfd
*, struct bfd_link_info
*);
2156 extern bfd_boolean _bfd_elf_add_dynamic_entry
2157 (struct bfd_link_info
*, bfd_vma
, bfd_vma
);
2159 extern bfd_boolean bfd_elf_link_record_dynamic_symbol
2160 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
2162 extern int bfd_elf_link_record_local_dynamic_symbol
2163 (struct bfd_link_info
*, bfd
*, long);
2165 extern bfd_boolean _bfd_elf_close_and_cleanup
2168 extern bfd_boolean _bfd_elf_common_definition
2169 (Elf_Internal_Sym
*);
2171 extern unsigned int _bfd_elf_common_section_index
2174 extern asection
*_bfd_elf_common_section
2177 extern bfd_vma _bfd_elf_default_got_elt_size
2178 (bfd
*, struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd
*,
2181 extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn
2182 (bfd
*, arelent
*, struct bfd_symbol
*, void *,
2183 asection
*, bfd
*, char **);
2185 extern bfd_boolean bfd_elf_final_link
2186 (bfd
*, struct bfd_link_info
*);
2188 extern void _bfd_elf_gc_keep
2189 (struct bfd_link_info
*info
);
2191 extern bfd_boolean bfd_elf_gc_mark_dynamic_ref_symbol
2192 (struct elf_link_hash_entry
*h
, void *inf
);
2194 extern bfd_boolean bfd_elf_gc_sections
2195 (bfd
*, struct bfd_link_info
*);
2197 extern bfd_boolean bfd_elf_gc_record_vtinherit
2198 (bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
);
2200 extern bfd_boolean bfd_elf_gc_record_vtentry
2201 (bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
);
2203 extern asection
*_bfd_elf_gc_mark_hook
2204 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
2205 struct elf_link_hash_entry
*, Elf_Internal_Sym
*);
2207 extern asection
*_bfd_elf_gc_mark_rsec
2208 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
,
2209 struct elf_reloc_cookie
*);
2211 extern bfd_boolean _bfd_elf_gc_mark_reloc
2212 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
,
2213 struct elf_reloc_cookie
*);
2215 extern bfd_boolean _bfd_elf_gc_mark_fdes
2216 (struct bfd_link_info
*, asection
*, asection
*, elf_gc_mark_hook_fn
,
2217 struct elf_reloc_cookie
*);
2219 extern bfd_boolean _bfd_elf_gc_mark
2220 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
);
2222 extern bfd_boolean _bfd_elf_gc_mark_extra_sections
2223 (struct bfd_link_info
*, elf_gc_mark_hook_fn
);
2225 extern bfd_boolean bfd_elf_gc_common_finalize_got_offsets
2226 (bfd
*, struct bfd_link_info
*);
2228 extern bfd_boolean bfd_elf_gc_common_final_link
2229 (bfd
*, struct bfd_link_info
*);
2231 extern bfd_boolean bfd_elf_reloc_symbol_deleted_p
2234 extern struct elf_segment_map
* _bfd_elf_make_dynamic_segment
2235 (bfd
*, asection
*);
2237 extern bfd_boolean _bfd_elf_map_sections_to_segments
2238 (bfd
*, struct bfd_link_info
*);
2240 extern bfd_boolean
_bfd_elf_is_function_type (unsigned int);
2242 extern bfd_size_type
_bfd_elf_maybe_function_sym (const asymbol
*, asection
*,
2245 extern int bfd_elf_get_default_section_type (flagword
);
2247 extern bfd_boolean bfd_elf_lookup_section_flags
2248 (struct bfd_link_info
*, struct flag_info
*, asection
*);
2250 extern Elf_Internal_Phdr
* _bfd_elf_find_segment_containing_section
2251 (bfd
* abfd
, asection
* section
);
2253 /* Exported interface for writing elf corefile notes. */
2254 extern char *elfcore_write_note
2255 (bfd
*, char *, int *, const char *, int, const void *, int);
2256 extern char *elfcore_write_prpsinfo
2257 (bfd
*, char *, int *, const char *, const char *);
2258 extern char *elfcore_write_prstatus
2259 (bfd
*, char *, int *, long, int, const void *);
2260 extern char * elfcore_write_pstatus
2261 (bfd
*, char *, int *, long, int, const void *);
2262 extern char *elfcore_write_prfpreg
2263 (bfd
*, char *, int *, const void *, int);
2264 extern char *elfcore_write_prxfpreg
2265 (bfd
*, char *, int *, const void *, int);
2266 extern char *elfcore_write_xstatereg
2267 (bfd
*, char *, int *, const void *, int);
2268 extern char *elfcore_write_ppc_vmx
2269 (bfd
*, char *, int *, const void *, int);
2270 extern char *elfcore_write_ppc_vsx
2271 (bfd
*, char *, int *, const void *, int);
2272 extern char *elfcore_write_s390_timer
2273 (bfd
*, char *, int *, const void *, int);
2274 extern char *elfcore_write_s390_todcmp
2275 (bfd
*, char *, int *, const void *, int);
2276 extern char *elfcore_write_s390_todpreg
2277 (bfd
*, char *, int *, const void *, int);
2278 extern char *elfcore_write_s390_ctrs
2279 (bfd
*, char *, int *, const void *, int);
2280 extern char *elfcore_write_s390_prefix
2281 (bfd
*, char *, int *, const void *, int);
2282 extern char *elfcore_write_s390_last_break
2283 (bfd
*, char *, int *, const void *, int);
2284 extern char *elfcore_write_s390_system_call
2285 (bfd
*, char *, int *, const void *, int);
2286 extern char *elfcore_write_s390_tdb
2287 (bfd
*, char *, int *, const void *, int);
2288 extern char *elfcore_write_s390_vxrs_low
2289 (bfd
*, char *, int *, const void *, int);
2290 extern char *elfcore_write_s390_vxrs_high
2291 (bfd
*, char *, int *, const void *, int);
2292 extern char *elfcore_write_arm_vfp
2293 (bfd
*, char *, int *, const void *, int);
2294 extern char *elfcore_write_aarch_tls
2295 (bfd
*, char *, int *, const void *, int);
2296 extern char *elfcore_write_aarch_hw_break
2297 (bfd
*, char *, int *, const void *, int);
2298 extern char *elfcore_write_aarch_hw_watch
2299 (bfd
*, char *, int *, const void *, int);
2300 extern char *elfcore_write_lwpstatus
2301 (bfd
*, char *, int *, long, int, const void *);
2302 extern char *elfcore_write_register_note
2303 (bfd
*, char *, int *, const char *, const void *, int);
2305 /* Internal structure which holds information to be included in the
2306 PRPSINFO section of Linux core files.
2308 This is an "internal" structure in the sense that it should be used
2309 to pass information to BFD (via the `elfcore_write_linux_prpsinfo'
2310 function), so things like endianess shouldn't be an issue. This
2311 structure will eventually be converted in one of the
2312 `elf_external_linux_*' structures and written out to an output bfd
2313 by one of the functions declared below. */
2315 struct elf_internal_linux_prpsinfo
2317 char pr_state
; /* Numeric process state. */
2318 char pr_sname
; /* Char for pr_state. */
2319 char pr_zomb
; /* Zombie. */
2320 char pr_nice
; /* Nice val. */
2321 unsigned long pr_flag
; /* Flags. */
2322 unsigned int pr_uid
;
2323 unsigned int pr_gid
;
2324 int pr_pid
, pr_ppid
, pr_pgrp
, pr_sid
;
2325 char pr_fname
[16 + 1]; /* Filename of executable. */
2326 char pr_psargs
[80 + 1]; /* Initial part of arg list. */
2329 /* Linux/most 32-bit archs. */
2330 extern char *elfcore_write_linux_prpsinfo32
2331 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
2333 /* Linux/most 64-bit archs. */
2334 extern char *elfcore_write_linux_prpsinfo64
2335 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
2337 /* Linux/PPC32 uses different layout compared to most archs. */
2338 extern char *elfcore_write_ppc_linux_prpsinfo32
2339 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
2341 extern bfd
*_bfd_elf32_bfd_from_remote_memory
2342 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
2343 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, bfd_size_type
));
2344 extern bfd
*_bfd_elf64_bfd_from_remote_memory
2345 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
2346 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, bfd_size_type
));
2348 extern bfd_vma
bfd_elf_obj_attr_size (bfd
*);
2349 extern void bfd_elf_set_obj_attr_contents (bfd
*, bfd_byte
*, bfd_vma
);
2350 extern int bfd_elf_get_obj_attr_int (bfd
*, int, int);
2351 extern void bfd_elf_add_obj_attr_int (bfd
*, int, int, unsigned int);
2352 #define bfd_elf_add_proc_attr_int(BFD, TAG, VALUE) \
2353 bfd_elf_add_obj_attr_int ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2354 extern void bfd_elf_add_obj_attr_string (bfd
*, int, int, const char *);
2355 #define bfd_elf_add_proc_attr_string(BFD, TAG, VALUE) \
2356 bfd_elf_add_obj_attr_string ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2357 extern void bfd_elf_add_obj_attr_int_string (bfd
*, int, int, unsigned int,
2359 #define bfd_elf_add_proc_attr_int_string(BFD, TAG, INTVAL, STRVAL) \
2360 bfd_elf_add_obj_attr_int_string ((BFD), OBJ_ATTR_PROC, (TAG), \
2363 extern char *_bfd_elf_attr_strdup (bfd
*, const char *);
2364 extern void _bfd_elf_copy_obj_attributes (bfd
*, bfd
*);
2365 extern int _bfd_elf_obj_attrs_arg_type (bfd
*, int, int);
2366 extern void _bfd_elf_parse_attributes (bfd
*, Elf_Internal_Shdr
*);
2367 extern bfd_boolean
_bfd_elf_merge_object_attributes (bfd
*, bfd
*);
2368 extern bfd_boolean
_bfd_elf_merge_unknown_attribute_low (bfd
*, bfd
*, int);
2369 extern bfd_boolean
_bfd_elf_merge_unknown_attribute_list (bfd
*, bfd
*);
2370 extern Elf_Internal_Shdr
*_bfd_elf_single_rel_hdr (asection
*sec
);
2372 /* The linker may need to keep track of the number of relocs that it
2373 decides to copy as dynamic relocs in check_relocs for each symbol.
2374 This is so that it can later discard them if they are found to be
2375 unnecessary. We can store the information in a field extending the
2376 regular ELF linker hash table. */
2378 struct elf_dyn_relocs
2380 struct elf_dyn_relocs
*next
;
2382 /* The input section of the reloc. */
2385 /* Total number of relocs copied for the input section. */
2386 bfd_size_type count
;
2388 /* Number of pc-relative relocs copied for the input section. */
2389 bfd_size_type pc_count
;
2392 extern bfd_boolean _bfd_elf_create_ifunc_sections
2393 (bfd
*, struct bfd_link_info
*);
2394 extern bfd_boolean _bfd_elf_allocate_ifunc_dyn_relocs
2395 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
2396 struct elf_dyn_relocs
**, unsigned int, unsigned int, unsigned int);
2397 extern long _bfd_elf_ifunc_get_synthetic_symtab
2398 (bfd
*, long, asymbol
**, long, asymbol
**, asymbol
**, asection
*,
2399 bfd_vma
*(*) (bfd
*, asymbol
**, asection
*, asection
*));
2401 extern void elf_append_rela (bfd
*, asection
*, Elf_Internal_Rela
*);
2402 extern void elf_append_rel (bfd
*, asection
*, Elf_Internal_Rela
*);
2404 extern bfd_vma
elf64_r_info (bfd_vma
, bfd_vma
);
2405 extern bfd_vma
elf64_r_sym (bfd_vma
);
2406 extern bfd_vma
elf32_r_info (bfd_vma
, bfd_vma
);
2407 extern bfd_vma
elf32_r_sym (bfd_vma
);
2409 /* Large common section. */
2410 extern asection _bfd_elf_large_com_section
;
2412 /* Hash for local symbol with the first section id, ID, in the input
2413 file and the local symbol index, SYM. */
2414 #define ELF_LOCAL_SYMBOL_HASH(ID, SYM) \
2415 (((((ID) & 0xff) << 24) | (((ID) & 0xff00) << 8)) \
2416 ^ (SYM) ^ ((ID) >> 16))
2418 /* This is the condition under which finish_dynamic_symbol will be called.
2419 If our finish_dynamic_symbol isn't called, we'll need to do something
2420 about initializing any .plt and .got entries in relocate_section. */
2421 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
2423 && ((SHARED) || !(H)->forced_local) \
2424 && ((H)->dynindx != -1 || (H)->forced_local))
2426 /* This macro is to avoid lots of duplicated code in the body
2427 of xxx_relocate_section() in the various elfxx-xxxx.c files. */
2428 #define RELOC_FOR_GLOBAL_SYMBOL(info, input_bfd, input_section, rel, \
2429 r_symndx, symtab_hdr, sym_hashes, \
2430 h, sec, relocation, \
2431 unresolved_reloc, warned, ignored) \
2434 /* It seems this can happen with erroneous or unsupported \
2435 input (mixing a.out and elf in an archive, for example.) */ \
2436 if (sym_hashes == NULL) \
2439 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; \
2441 if (info->wrap_hash != NULL \
2442 && (input_section->flags & SEC_DEBUGGING) != 0) \
2443 h = ((struct elf_link_hash_entry *) \
2444 unwrap_hash_lookup (info, input_bfd, &h->root)); \
2446 while (h->root.type == bfd_link_hash_indirect \
2447 || h->root.type == bfd_link_hash_warning) \
2448 h = (struct elf_link_hash_entry *) h->root.u.i.link; \
2452 unresolved_reloc = FALSE; \
2454 if (h->root.type == bfd_link_hash_defined \
2455 || h->root.type == bfd_link_hash_defweak) \
2457 sec = h->root.u.def.section; \
2459 || sec->output_section == NULL) \
2460 /* Set a flag that will be cleared later if we find a \
2461 relocation value for this symbol. output_section \
2462 is typically NULL for symbols satisfied by a shared \
2464 unresolved_reloc = TRUE; \
2466 relocation = (h->root.u.def.value \
2467 + sec->output_section->vma \
2468 + sec->output_offset); \
2470 else if (h->root.type == bfd_link_hash_undefweak) \
2472 else if (info->unresolved_syms_in_objects == RM_IGNORE \
2473 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) \
2475 else if (!info->relocatable) \
2478 err = (info->unresolved_syms_in_objects == RM_GENERATE_ERROR \
2479 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT); \
2480 if (!info->callbacks->undefined_symbol (info, \
2481 h->root.root.string, \
2484 rel->r_offset, err)) \
2488 (void) unresolved_reloc; \
2494 /* This macro is to avoid lots of duplicated code in the body of the
2495 loop over relocations in xxx_relocate_section() in the various
2498 Handle relocations against symbols from removed linkonce sections,
2499 or sections discarded by a linker script. When doing a relocatable
2500 link, we remove such relocations. Otherwise, we just want the
2501 section contents zeroed and avoid any special processing. */
2502 #define RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
2503 rel, count, relend, \
2504 howto, index, contents) \
2507 _bfd_clear_contents (howto, input_bfd, input_section, \
2508 contents + rel[index].r_offset); \
2510 if (info->relocatable \
2511 && (input_section->flags & SEC_DEBUGGING)) \
2513 /* Only remove relocations in debug sections since other \
2514 sections may require relocations. */ \
2515 Elf_Internal_Shdr *rel_hdr; \
2517 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
2519 /* Avoid empty output section. */ \
2520 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
2522 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
2523 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
2524 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
2526 memmove (rel, rel + count, \
2527 (relend - rel - count) * sizeof (*rel)); \
2529 input_section->reloc_count--; \
2536 for (i_ = 0; i_ < count; i_++) \
2538 rel[i_].r_info = 0; \
2539 rel[i_].r_addend = 0; \
2545 /* Will a symbol be bound to the definition within the shared
2546 library, if any. A unique symbol can never be bound locally. */
2547 #define SYMBOLIC_BIND(INFO, H) \
2548 (!(H)->unique_global \
2549 && ((INFO)->symbolic || ((INFO)->dynamic && !(H)->dynamic)))
2554 #endif /* _LIBELF_H_ */