1 /* BFD back-end data structures for ELF files.
2 Copyright (C) 1992-2014 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"
30 /* The number of entries in a section is its size divided by the size
31 of a single entry. This is normally only applicable to reloc and
32 symbol table sections.
33 PR 9934: It is possible to have relocations that do not refer to
34 symbols, thus it is also possible to have a relocation section in
35 an object file, but no symbol table. */
36 #define NUM_SHDR_ENTRIES(shdr) ((shdr)->sh_entsize > 0 ? (shdr)->sh_size / (shdr)->sh_entsize : 0)
38 /* If size isn't specified as 64 or 32, NAME macro should fail. */
41 #define NAME(x, y) x ## 64 ## _ ## y
44 #define NAME(x, y) x ## 32 ## _ ## y
49 #define NAME(x, y) x ## NOSIZE ## _ ## y
52 #define ElfNAME(X) NAME(Elf,X)
53 #define elfNAME(X) NAME(elf,X)
55 /* Information held for an ELF symbol. The first field is the
56 corresponding asymbol. Every symbol is an ELF file is actually a
57 pointer to this structure, although it is often handled as a
58 pointer to an asymbol. */
64 /* ELF symbol information. */
65 Elf_Internal_Sym internal_elf_sym
;
66 /* Backend specific information. */
69 unsigned int hppa_arg_reloc
;
75 /* Version information. This is from an Elf_Internal_Versym
76 structure in a SHT_GNU_versym section. It is zero if there is no
77 version information. */
78 unsigned short version
;
82 struct elf_strtab_hash
;
88 bfd_signed_vma refcount
;
90 struct got_entry
*glist
;
91 struct plt_entry
*plist
;
94 struct elf_link_virtual_table_entry
96 /* Virtual table entry use information. This array is nominally of size
97 size/sizeof(target_void_pointer), though we have to be able to assume
98 and track a size while the symbol is still undefined. It is indexed
99 via offset/sizeof(target_void_pointer). */
103 /* Virtual table derivation info. */
104 struct elf_link_hash_entry
*parent
;
107 /* ELF linker hash table entries. */
109 struct elf_link_hash_entry
111 struct bfd_link_hash_entry root
;
113 /* Symbol index in output file. This is initialized to -1. It is
114 set to -2 if the symbol is used by a reloc. */
117 /* Symbol index as a dynamic symbol. Initialized to -1, and remains
118 -1 if this is not a dynamic symbol. */
119 /* ??? Note that this is consistently used as a synonym for tests
120 against whether we can perform various simplifying transformations
121 to the code. (E.g. changing a pc-relative jump to a PLT entry
122 into a pc-relative jump to the target function.) That test, which
123 is often relatively complex, and someplaces wrong or incomplete,
124 should really be replaced by a predicate in elflink.c.
126 End result: this field -1 does not indicate that the symbol is
127 not in the dynamic symbol table, but rather that the symbol is
128 not visible outside this DSO. */
131 /* If this symbol requires an entry in the global offset table, the
132 processor specific backend uses this field to track usage and
133 final offset. Two schemes are supported: The first assumes that
134 a symbol may only have one GOT entry, and uses REFCOUNT until
135 size_dynamic_sections, at which point the contents of the .got is
136 fixed. Afterward, if OFFSET is -1, then the symbol does not
137 require a global offset table entry. The second scheme allows
138 multiple GOT entries per symbol, managed via a linked list
139 pointed to by GLIST. */
140 union gotplt_union got
;
142 /* Same, but tracks a procedure linkage table entry. */
143 union gotplt_union plt
;
148 /* Symbol type (STT_NOTYPE, STT_OBJECT, etc.). */
149 unsigned int type
: 8;
151 /* Symbol st_other value, symbol visibility. */
152 unsigned int other
: 8;
154 /* The symbol's st_target_internal value (see Elf_Internal_Sym). */
155 unsigned int target_internal
: 8;
157 /* Symbol is referenced by a non-shared object (other than the object
158 in which it is defined). */
159 unsigned int ref_regular
: 1;
160 /* Symbol is defined by a non-shared object. */
161 unsigned int def_regular
: 1;
162 /* Symbol is referenced by a shared object. */
163 unsigned int ref_dynamic
: 1;
164 /* Symbol is defined by a shared object. */
165 unsigned int def_dynamic
: 1;
166 /* Symbol has a non-weak reference from a non-shared object (other than
167 the object in which it is defined). */
168 unsigned int ref_regular_nonweak
: 1;
169 /* Dynamic symbol has been adjustd. */
170 unsigned int dynamic_adjusted
: 1;
171 /* Symbol needs a copy reloc. */
172 unsigned int needs_copy
: 1;
173 /* Symbol needs a procedure linkage table entry. */
174 unsigned int needs_plt
: 1;
175 /* Symbol appears in a non-ELF input file. */
176 unsigned int non_elf
: 1;
177 /* Symbol should be marked as hidden in the version information. */
178 unsigned int hidden
: 1;
179 /* Symbol was forced to local scope due to a version script file. */
180 unsigned int forced_local
: 1;
181 /* Symbol was forced to be dynamic due to a version script file. */
182 unsigned int dynamic
: 1;
183 /* Symbol was marked during garbage collection. */
184 unsigned int mark
: 1;
185 /* Symbol is referenced by a non-GOT/non-PLT relocation. This is
186 not currently set by all the backends. */
187 unsigned int non_got_ref
: 1;
188 /* Symbol has a definition in a shared object.
189 FIXME: There is no real need for this field if def_dynamic is never
190 cleared and all places that test def_dynamic also test def_regular. */
191 unsigned int dynamic_def
: 1;
192 /* Symbol has a non-weak reference from a shared object. */
193 unsigned int ref_dynamic_nonweak
: 1;
194 /* Symbol is referenced with a relocation where C/C++ pointer equality
196 unsigned int pointer_equality_needed
: 1;
197 /* Symbol is a unique global symbol. */
198 unsigned int unique_global
: 1;
200 /* String table index in .dynstr if this is a dynamic symbol. */
201 unsigned long dynstr_index
;
205 /* If this is a weak defined symbol from a dynamic object, this
206 field points to a defined symbol with the same value, if there is
207 one. Otherwise it is NULL. */
208 struct elf_link_hash_entry
*weakdef
;
210 /* Hash value of the name computed using the ELF hash function.
211 Used part way through size_dynamic_sections, after we've finished
213 unsigned long elf_hash_value
;
216 /* Version information. */
219 /* This field is used for a symbol which is not defined in a
220 regular object. It points to the version information read in
221 from the dynamic object. */
222 Elf_Internal_Verdef
*verdef
;
223 /* This field is used for a symbol which is defined in a regular
224 object. It is set up in size_dynamic_sections. It points to
225 the version information we should write out for this symbol. */
226 struct bfd_elf_version_tree
*vertree
;
229 struct elf_link_virtual_table_entry
*vtable
;
232 /* Will references to this symbol always reference the symbol
234 #define SYMBOL_REFERENCES_LOCAL(INFO, H) \
235 _bfd_elf_symbol_refs_local_p (H, INFO, 0)
237 /* Will _calls_ to this symbol always call the version in this object? */
238 #define SYMBOL_CALLS_LOCAL(INFO, H) \
239 _bfd_elf_symbol_refs_local_p (H, INFO, 1)
241 /* Common symbols that are turned into definitions don't have the
242 DEF_REGULAR flag set, so they might appear to be undefined. */
243 #define ELF_COMMON_DEF_P(H) \
245 && !(H)->def_dynamic \
246 && (H)->root.type == bfd_link_hash_defined)
248 /* Records local symbols to be emitted in the dynamic symbol table. */
250 struct elf_link_local_dynamic_entry
252 struct elf_link_local_dynamic_entry
*next
;
254 /* The input bfd this symbol came from. */
257 /* The index of the local symbol being copied. */
260 /* The index in the outgoing dynamic symbol table. */
263 /* A copy of the input symbol. */
264 Elf_Internal_Sym isym
;
267 struct elf_link_loaded_list
269 struct elf_link_loaded_list
*next
;
273 /* Structures used by the eh_frame optimization code. */
278 /* If REMOVED == 1, this is the CIE that the FDE originally used.
279 The CIE belongs to the same .eh_frame input section as the FDE.
281 If REMOVED == 0, this is the CIE that we have chosen to use for
282 the output FDE. The CIE's REMOVED field is also 0, but the CIE
283 might belong to a different .eh_frame input section from the FDE. */
284 struct eh_cie_fde
*cie_inf
;
285 struct eh_cie_fde
*next_for_section
;
288 /* CIEs have three states:
290 - REMOVED && !MERGED: Slated for removal because we haven't yet
291 proven that an FDE needs it. FULL_CIE, if nonnull, points to
292 more detailed information about the CIE.
294 - REMOVED && MERGED: We have merged this CIE with MERGED_WITH,
295 which may not belong to the same input section.
297 - !REMOVED: We have decided to keep this CIE. SEC is the
298 .eh_frame input section that contains the CIE. */
300 struct cie
*full_cie
;
301 struct eh_cie_fde
*merged_with
;
305 /* The offset of the personality data from the start of the CIE,
306 or 0 if the CIE doesn't have any. */
307 unsigned int personality_offset
: 8;
309 /* True if we have marked relocations associated with this CIE. */
310 unsigned int gc_mark
: 1;
312 /* True if we have decided to turn an absolute LSDA encoding into
313 a PC-relative one. */
314 unsigned int make_lsda_relative
: 1;
316 /* True if we have decided to turn an absolute personality
317 encoding into a PC-relative one. */
318 unsigned int make_per_encoding_relative
: 1;
320 /* True if the CIE contains personality data and if that
321 data uses a PC-relative encoding. Always true when
322 make_per_encoding_relative is. */
323 unsigned int per_encoding_relative
: 1;
325 /* True if we need to add an 'R' (FDE encoding) entry to the
326 CIE's augmentation data. */
327 unsigned int add_fde_encoding
: 1;
329 /* True if we have merged this CIE with another. */
330 unsigned int merged
: 1;
333 unsigned int pad1
: 18;
336 unsigned int reloc_index
;
339 unsigned int new_offset
;
340 unsigned int fde_encoding
: 8;
341 unsigned int lsda_encoding
: 8;
342 unsigned int lsda_offset
: 8;
344 /* True if this entry represents a CIE, false if it represents an FDE. */
345 unsigned int cie
: 1;
347 /* True if this entry is currently marked for removal. */
348 unsigned int removed
: 1;
350 /* True if we need to add a 'z' (augmentation size) entry to the CIE's
351 augmentation data, and an associated byte to each of the CIE's FDEs. */
352 unsigned int add_augmentation_size
: 1;
354 /* True if we have decided to convert absolute FDE relocations into
355 relative ones. This applies to the first relocation in the FDE,
356 which is against the code that the FDE describes. */
357 unsigned int make_relative
: 1;
360 unsigned int pad1
: 4;
362 unsigned int *set_loc
;
365 struct eh_frame_sec_info
369 struct eh_cie_fde entry
[1];
372 struct eh_frame_array_ent
380 struct eh_frame_hdr_info
384 unsigned int fde_count
, array_count
;
385 struct eh_frame_array_ent
*array
;
386 /* TRUE if .eh_frame_hdr should contain the sorted search table.
387 We build it if we successfully read all .eh_frame input sections
388 and recognize them. */
392 /* Enum used to identify target specific extensions to the elf_obj_tdata
393 and elf_link_hash_table structures. Note the enums deliberately start
394 from 1 so that we can detect an uninitialized field. The generic value
395 is last so that additions to this enum do not need to modify more than
399 AARCH64_ELF_DATA
= 1,
436 /* ELF linker hash table. */
438 struct elf_link_hash_table
440 struct bfd_link_hash_table root
;
442 /* An identifier used to distinguish different target
443 specific extensions to this structure. */
444 enum elf_target_id hash_table_id
;
446 /* Whether we have created the special dynamic sections required
447 when linking against or generating a shared object. */
448 bfd_boolean dynamic_sections_created
;
450 /* True if this target has relocatable executables, so needs dynamic
452 bfd_boolean is_relocatable_executable
;
454 /* The BFD used to hold special sections created by the linker.
455 This will be the first BFD found which requires these sections to
459 /* The value to use when initialising got.refcount/offset and
460 plt.refcount/offset in an elf_link_hash_entry. Set to zero when
461 the values are refcounts. Set to init_got_offset/init_plt_offset
462 in size_dynamic_sections when the values may be offsets. */
463 union gotplt_union init_got_refcount
;
464 union gotplt_union init_plt_refcount
;
466 /* The value to use for got.refcount/offset and plt.refcount/offset
467 when the values may be offsets. Normally (bfd_vma) -1. */
468 union gotplt_union init_got_offset
;
469 union gotplt_union init_plt_offset
;
471 /* The number of symbols found in the link which must be put into
472 the .dynsym section. */
473 bfd_size_type dynsymcount
;
475 /* The string table of dynamic symbols, which becomes the .dynstr
477 struct elf_strtab_hash
*dynstr
;
479 /* The number of buckets in the hash table in the .hash section.
480 This is based on the number of dynamic symbols. */
481 bfd_size_type bucketcount
;
483 /* A linked list of DT_NEEDED names found in dynamic objects
484 included in the link. */
485 struct bfd_link_needed_list
*needed
;
487 /* Sections in the output bfd that provides a section symbol
488 to be used by relocations emitted against local symbols.
489 Most targets will not use data_index_section. */
490 asection
*text_index_section
;
491 asection
*data_index_section
;
493 /* The _GLOBAL_OFFSET_TABLE_ symbol. */
494 struct elf_link_hash_entry
*hgot
;
496 /* The _PROCEDURE_LINKAGE_TABLE_ symbol. */
497 struct elf_link_hash_entry
*hplt
;
499 /* The _DYNAMIC symbol. */
500 struct elf_link_hash_entry
*hdynamic
;
502 /* A pointer to information used to merge SEC_MERGE sections. */
505 /* Used to link stabs in sections. */
506 struct stab_info stab_info
;
508 /* Used by eh_frame code when editing .eh_frame. */
509 struct eh_frame_hdr_info eh_info
;
511 /* A linked list of local symbols to be added to .dynsym. */
512 struct elf_link_local_dynamic_entry
*dynlocal
;
514 /* A linked list of DT_RPATH/DT_RUNPATH names found in dynamic
515 objects included in the link. */
516 struct bfd_link_needed_list
*runpath
;
518 /* Cached first output tls section and size of PT_TLS segment. */
520 bfd_size_type tls_size
;
522 /* A linked list of BFD's loaded in the link. */
523 struct elf_link_loaded_list
*loaded
;
525 /* Short-cuts to get to dynamic linker sections. */
537 /* Look up an entry in an ELF linker hash table. */
539 #define elf_link_hash_lookup(table, string, create, copy, follow) \
540 ((struct elf_link_hash_entry *) \
541 bfd_link_hash_lookup (&(table)->root, (string), (create), \
544 /* Traverse an ELF linker hash table. */
546 #define elf_link_hash_traverse(table, func, info) \
547 (bfd_link_hash_traverse \
549 (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func), \
552 /* Get the ELF linker hash table from a link_info structure. */
554 #define elf_hash_table(p) ((struct elf_link_hash_table *) ((p)->hash))
556 #define elf_hash_table_id(table) ((table) -> hash_table_id)
558 /* Returns TRUE if the hash table is a struct elf_link_hash_table. */
559 #define is_elf_hash_table(htab) \
560 (((struct bfd_link_hash_table *) (htab))->type == bfd_link_elf_hash_table)
562 /* Used by bfd_sym_from_r_symndx to cache a small number of local
564 #define LOCAL_SYM_CACHE_SIZE 32
568 unsigned long indx
[LOCAL_SYM_CACHE_SIZE
];
569 Elf_Internal_Sym sym
[LOCAL_SYM_CACHE_SIZE
];
572 /* Constant information held for an ELF backend. */
574 struct elf_size_info
{
575 unsigned char sizeof_ehdr
, sizeof_phdr
, sizeof_shdr
;
576 unsigned char sizeof_rel
, sizeof_rela
, sizeof_sym
, sizeof_dyn
, sizeof_note
;
578 /* The size of entries in the .hash section. */
579 unsigned char sizeof_hash_entry
;
581 /* The number of internal relocations to allocate per external
583 unsigned char int_rels_per_ext_rel
;
584 /* We use some fixed size arrays. This should be large enough to
585 handle all back-ends. */
586 #define MAX_INT_RELS_PER_EXT_REL 3
588 unsigned char arch_size
, log_file_align
;
589 unsigned char elfclass
, ev_current
;
590 int (*write_out_phdrs
)
591 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
593 (*write_shdrs_and_ehdr
) (bfd
*);
594 bfd_boolean (*checksum_contents
)
595 (bfd
* , void (*) (const void *, size_t, void *), void *);
597 (bfd
*, asection
*, void *);
598 bfd_boolean (*swap_symbol_in
)
599 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
600 void (*swap_symbol_out
)
601 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
602 bfd_boolean (*slurp_reloc_table
)
603 (bfd
*, asection
*, asymbol
**, bfd_boolean
);
604 long (*slurp_symbol_table
)
605 (bfd
*, asymbol
**, bfd_boolean
);
607 (bfd
*, const void *, Elf_Internal_Dyn
*);
609 (bfd
*, const Elf_Internal_Dyn
*, void *);
611 /* This function is called to swap in a REL relocation. If an
612 external relocation corresponds to more than one internal
613 relocation, then all relocations are swapped in at once. */
614 void (*swap_reloc_in
)
615 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
617 /* This function is called to swap out a REL relocation. */
618 void (*swap_reloc_out
)
619 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
621 /* This function is called to swap in a RELA 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_reloca_in
)
625 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
627 /* This function is called to swap out a RELA relocation. */
628 void (*swap_reloca_out
)
629 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
632 #define elf_symbol_from(ABFD,S) \
633 (((S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \
634 && (S)->the_bfd->tdata.elf_obj_data != 0) \
635 ? (elf_symbol_type *) (S) \
638 enum elf_reloc_type_class
{
640 reloc_class_relative
,
646 struct elf_reloc_cookie
648 Elf_Internal_Rela
*rels
, *rel
, *relend
;
649 Elf_Internal_Sym
*locsyms
;
653 struct elf_link_hash_entry
**sym_hashes
;
655 bfd_boolean bad_symtab
;
658 /* The level of IRIX compatibility we're striving for. */
666 /* Mapping of ELF section names and types. */
667 struct bfd_elf_special_section
671 /* 0 means name must match PREFIX exactly.
672 -1 means name must start with PREFIX followed by an arbitrary string.
673 -2 means name must match PREFIX exactly or consist of PREFIX followed
674 by a dot then anything.
675 > 0 means name must start with the first PREFIX_LENGTH chars of
676 PREFIX and finish with the last SUFFIX_LENGTH chars of PREFIX. */
682 enum action_discarded
688 typedef asection
* (*elf_gc_mark_hook_fn
)
689 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
690 struct elf_link_hash_entry
*, Elf_Internal_Sym
*);
692 struct elf_backend_data
694 /* The architecture for this backend. */
695 enum bfd_architecture arch
;
697 /* An identifier used to distinguish different target specific
698 extensions to elf_obj_tdata and elf_link_hash_table structures. */
699 enum elf_target_id target_id
;
701 /* The ELF machine code (EM_xxxx) for this backend. */
702 int elf_machine_code
;
707 /* The maximum page size for this backend. */
710 /* The minimum page size for this backend. An input object will not be
711 considered page aligned unless its sections are correctly aligned for
712 pages at least this large. May be smaller than maxpagesize. */
715 /* The common page size for this backend. */
716 bfd_vma commonpagesize
;
718 /* The BFD flags applied to sections created for dynamic linking. */
719 flagword dynamic_sec_flags
;
721 /* Architecture-specific data for this backend.
722 This is actually a pointer to some type like struct elf_ARCH_data. */
723 const void *arch_data
;
725 /* A function to translate an ELF RELA relocation to a BFD arelent
727 void (*elf_info_to_howto
)
728 (bfd
*, arelent
*, Elf_Internal_Rela
*);
730 /* A function to translate an ELF REL relocation to a BFD arelent
732 void (*elf_info_to_howto_rel
)
733 (bfd
*, arelent
*, Elf_Internal_Rela
*);
735 /* A function to determine whether a symbol is global when
736 partitioning the symbol table into local and global symbols.
737 This should be NULL for most targets, in which case the correct
738 thing will be done. MIPS ELF, at least on the Irix 5, has
739 special requirements. */
740 bfd_boolean (*elf_backend_sym_is_global
)
743 /* The remaining functions are hooks which are called only if they
746 /* A function to permit a backend specific check on whether a
747 particular BFD format is relevant for an object file, and to
748 permit the backend to set any global information it wishes. When
749 this is called elf_elfheader is set, but anything else should be
750 used with caution. If this returns FALSE, the check_format
751 routine will return a bfd_error_wrong_format error. */
752 bfd_boolean (*elf_backend_object_p
)
755 /* A function to do additional symbol processing when reading the
756 ELF symbol table. This is where any processor-specific special
757 section indices are handled. */
758 void (*elf_backend_symbol_processing
)
761 /* A function to do additional symbol processing after reading the
762 entire ELF symbol table. */
763 bfd_boolean (*elf_backend_symbol_table_processing
)
764 (bfd
*, elf_symbol_type
*, unsigned int);
766 /* A function to set the type of the info field. Processor-specific
767 types should be handled here. */
768 int (*elf_backend_get_symbol_type
)
769 (Elf_Internal_Sym
*, int);
771 /* A function to return the linker hash table entry of a symbol that
772 might be satisfied by an archive symbol. */
773 struct elf_link_hash_entry
* (*elf_backend_archive_symbol_lookup
)
774 (bfd
*, struct bfd_link_info
*, const char *);
776 /* Return true if local section symbols should have a non-null st_name.
777 NULL implies false. */
778 bfd_boolean (*elf_backend_name_local_section_symbols
)
781 /* A function to do additional processing on the ELF section header
782 just before writing it out. This is used to set the flags and
783 type fields for some sections, or to actually write out data for
785 bfd_boolean (*elf_backend_section_processing
)
786 (bfd
*, Elf_Internal_Shdr
*);
788 /* A function to handle unusual section types when creating BFD
789 sections from ELF sections. */
790 bfd_boolean (*elf_backend_section_from_shdr
)
791 (bfd
*, Elf_Internal_Shdr
*, const char *, int);
793 /* A function to convert machine dependent ELF section header flags to
794 BFD internal section header flags. */
795 bfd_boolean (*elf_backend_section_flags
)
796 (flagword
*, const Elf_Internal_Shdr
*);
798 /* A function that returns a struct containing ELF section flags and
799 type for the given BFD section. */
800 const struct bfd_elf_special_section
* (*get_sec_type_attr
)
803 /* A function to handle unusual program segment types when creating BFD
804 sections from ELF program segments. */
805 bfd_boolean (*elf_backend_section_from_phdr
)
806 (bfd
*, Elf_Internal_Phdr
*, int, const char *);
808 /* A function to set up the ELF section header for a BFD section in
809 preparation for writing it out. This is where the flags and type
810 fields are set for unusual sections. */
811 bfd_boolean (*elf_backend_fake_sections
)
812 (bfd
*, Elf_Internal_Shdr
*, asection
*);
814 /* A function to get the ELF section index for a BFD section. If
815 this returns TRUE, the section was found. If it is a normal ELF
816 section, *RETVAL should be left unchanged. If it is not a normal
817 ELF section *RETVAL should be set to the SHN_xxxx index. */
818 bfd_boolean (*elf_backend_section_from_bfd_section
)
819 (bfd
*, asection
*, int *retval
);
821 /* If this field is not NULL, it is called by the add_symbols phase
822 of a link just before adding a symbol to the global linker hash
823 table. It may modify any of the fields as it wishes. If *NAME
824 is set to NULL, the symbol will be skipped rather than being
825 added to the hash table. This function is responsible for
826 handling all processor dependent symbol bindings and section
827 indices, and must set at least *FLAGS and *SEC for each processor
828 dependent case; failure to do so will cause a link error. */
829 bfd_boolean (*elf_add_symbol_hook
)
830 (bfd
*abfd
, struct bfd_link_info
*info
, Elf_Internal_Sym
*,
831 const char **name
, flagword
*flags
, asection
**sec
, bfd_vma
*value
);
833 /* If this field is not NULL, it is called by the elf_link_output_sym
834 phase of a link for each symbol which will appear in the object file.
835 On error, this function returns 0. 1 is returned when the symbol
836 should be output, 2 is returned when the symbol should be discarded. */
837 int (*elf_backend_link_output_symbol_hook
)
838 (struct bfd_link_info
*info
, const char *, Elf_Internal_Sym
*,
839 asection
*, struct elf_link_hash_entry
*);
841 /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend
842 linker the first time it encounters a dynamic object in the link.
843 This function must create any sections required for dynamic
844 linking. The ABFD argument is a dynamic object. The .interp,
845 .dynamic, .dynsym, .dynstr, and .hash functions have already been
846 created, and this function may modify the section flags if
847 desired. This function will normally create the .got and .plt
848 sections, but different backends have different requirements. */
849 bfd_boolean (*elf_backend_create_dynamic_sections
)
850 (bfd
*abfd
, struct bfd_link_info
*info
);
852 /* When creating a shared library, determine whether to omit the
853 dynamic symbol for the section. */
854 bfd_boolean (*elf_backend_omit_section_dynsym
)
855 (bfd
*output_bfd
, struct bfd_link_info
*info
, asection
*osec
);
857 /* Return TRUE if relocations of targets are compatible to the extent
858 that CHECK_RELOCS will properly process them. PR 4424. */
859 bfd_boolean (*relocs_compatible
) (const bfd_target
*, const bfd_target
*);
861 /* The CHECK_RELOCS function is called by the add_symbols phase of
862 the ELF backend linker. It is called once for each section with
863 relocs of an object file, just after the symbols for the object
864 file have been added to the global linker hash table. The
865 function must look through the relocs and do any special handling
866 required. This generally means allocating space in the global
867 offset table, and perhaps allocating space for a reloc. The
868 relocs are always passed as Rela structures; if the section
869 actually uses Rel structures, the r_addend field will always be
871 bfd_boolean (*check_relocs
)
872 (bfd
*abfd
, struct bfd_link_info
*info
, asection
*o
,
873 const Elf_Internal_Rela
*relocs
);
875 /* The CHECK_DIRECTIVES function is called once per input file by
876 the add_symbols phase of the ELF backend linker. The function
877 must inspect the bfd and create any additional symbols according
878 to any custom directives in the bfd. */
879 bfd_boolean (*check_directives
)
880 (bfd
*abfd
, struct bfd_link_info
*info
);
882 /* The NOTICE_AS_NEEDED function is called as the linker is about to
883 handle an as-needed lib (ACT = notice_as_needed), and after the
884 linker has decided to keep the lib (ACT = notice_needed) or when
885 the lib is not needed (ACT = notice_not_needed). */
886 bfd_boolean (*notice_as_needed
)
887 (bfd
*abfd
, struct bfd_link_info
*info
, enum notice_asneeded_action act
);
889 /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
890 linker for every symbol which is defined by a dynamic object and
891 referenced by a regular object. This is called after all the
892 input files have been seen, but before the SIZE_DYNAMIC_SECTIONS
893 function has been called. The hash table entry should be
894 bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be
895 defined in a section from a dynamic object. Dynamic object
896 sections are not included in the final link, and this function is
897 responsible for changing the value to something which the rest of
898 the link can deal with. This will normally involve adding an
899 entry to the .plt or .got or some such section, and setting the
900 symbol to point to that. */
901 bfd_boolean (*elf_backend_adjust_dynamic_symbol
)
902 (struct bfd_link_info
*info
, struct elf_link_hash_entry
*h
);
904 /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker
905 after all the linker input files have been seen but before the
906 section sizes have been set. This is called after
907 ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS. */
908 bfd_boolean (*elf_backend_always_size_sections
)
909 (bfd
*output_bfd
, struct bfd_link_info
*info
);
911 /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend
912 linker after all the linker input files have been seen but before
913 the sections sizes have been set. This is called after
914 ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols.
915 It is only called when linking against a dynamic object. It must
916 set the sizes of the dynamic sections, and may fill in their
917 contents as well. The generic ELF linker can handle the .dynsym,
918 .dynstr and .hash sections. This function must handle the
919 .interp section and any sections created by the
920 CREATE_DYNAMIC_SECTIONS entry point. */
921 bfd_boolean (*elf_backend_size_dynamic_sections
)
922 (bfd
*output_bfd
, struct bfd_link_info
*info
);
924 /* Set TEXT_INDEX_SECTION and DATA_INDEX_SECTION, the output sections
925 we keep to use as a base for relocs and symbols. */
926 void (*elf_backend_init_index_section
)
927 (bfd
*output_bfd
, struct bfd_link_info
*info
);
929 /* The RELOCATE_SECTION function is called by the ELF backend linker
930 to handle the relocations for a section.
932 The relocs are always passed as Rela structures; if the section
933 actually uses Rel structures, the r_addend field will always be
936 This function is responsible for adjust the section contents as
937 necessary, and (if using Rela relocs and generating a
938 relocatable output file) adjusting the reloc addend as
941 This function does not have to worry about setting the reloc
942 address or the reloc symbol index.
944 LOCAL_SYMS is a pointer to the swapped in local symbols.
946 LOCAL_SECTIONS is an array giving the section in the input file
947 corresponding to the st_shndx field of each local symbol.
949 The global hash table entry for the global symbols can be found
950 via elf_sym_hashes (input_bfd).
952 When generating relocatable output, this function must handle
953 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
954 going to be the section symbol corresponding to the output
955 section, which means that the addend must be adjusted
958 Returns FALSE on error, TRUE on success, 2 if successful and
959 relocations should be written for this section. */
960 int (*elf_backend_relocate_section
)
961 (bfd
*output_bfd
, struct bfd_link_info
*info
, bfd
*input_bfd
,
962 asection
*input_section
, bfd_byte
*contents
, Elf_Internal_Rela
*relocs
,
963 Elf_Internal_Sym
*local_syms
, asection
**local_sections
);
965 /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend
966 linker just before it writes a symbol out to the .dynsym section.
967 The processor backend may make any required adjustment to the
968 symbol. It may also take the opportunity to set contents of the
969 dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on
970 all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called
971 on those symbols which are defined by a dynamic object. */
972 bfd_boolean (*elf_backend_finish_dynamic_symbol
)
973 (bfd
*output_bfd
, struct bfd_link_info
*info
,
974 struct elf_link_hash_entry
*h
, Elf_Internal_Sym
*sym
);
976 /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend
977 linker just before it writes all the dynamic sections out to the
978 output file. The FINISH_DYNAMIC_SYMBOL will have been called on
979 all dynamic symbols. */
980 bfd_boolean (*elf_backend_finish_dynamic_sections
)
981 (bfd
*output_bfd
, struct bfd_link_info
*info
);
983 /* A function to do any beginning processing needed for the ELF file
984 before building the ELF headers and computing file positions. */
985 void (*elf_backend_begin_write_processing
)
986 (bfd
*, struct bfd_link_info
*);
988 /* A function to do any final processing needed for the ELF file
989 before writing it out. The LINKER argument is TRUE if this BFD
990 was created by the ELF backend linker. */
991 void (*elf_backend_final_write_processing
)
992 (bfd
*, bfd_boolean linker
);
994 /* This function is called by get_program_header_size. It should
995 return the number of additional program segments which this BFD
996 will need. It should return -1 on error. */
997 int (*elf_backend_additional_program_headers
)
998 (bfd
*, struct bfd_link_info
*);
1000 /* This function is called to modify an existing segment map in a
1001 backend specific fashion. */
1002 bfd_boolean (*elf_backend_modify_segment_map
)
1003 (bfd
*, struct bfd_link_info
*);
1005 /* This function is called to modify program headers just before
1006 they are written. */
1007 bfd_boolean (*elf_backend_modify_program_headers
)
1008 (bfd
*, struct bfd_link_info
*);
1010 /* This function is called before section garbage collection to
1011 mark entry symbol sections. */
1013 (struct bfd_link_info
*);
1015 /* This function is called during section garbage collection to
1016 mark sections that define global symbols. */
1017 bfd_boolean (*gc_mark_dynamic_ref
)
1018 (struct elf_link_hash_entry
*, void *);
1020 /* This function is called during section gc to discover the section a
1021 particular relocation refers to. */
1022 elf_gc_mark_hook_fn gc_mark_hook
;
1024 /* This function, if defined, is called after the first gc marking pass
1025 to allow the backend to mark additional sections. */
1026 bfd_boolean (*gc_mark_extra_sections
)
1027 (struct bfd_link_info
*, elf_gc_mark_hook_fn
);
1029 /* This function, if defined, is called during the sweep phase of gc
1030 in order that a backend might update any data structures it might
1032 bfd_boolean (*gc_sweep_hook
)
1033 (bfd
*, struct bfd_link_info
*, asection
*, const Elf_Internal_Rela
*);
1035 /* This function, if defined, is called after the ELF headers have
1036 been created. This allows for things like the OS and ABI versions
1038 void (*elf_backend_post_process_headers
)
1039 (bfd
*, struct bfd_link_info
*);
1041 /* This function, if defined, prints a symbol to file and returns the
1042 name of the symbol to be printed. It should return NULL to fall
1043 back to default symbol printing. */
1044 const char *(*elf_backend_print_symbol_all
)
1045 (bfd
*, void *, asymbol
*);
1047 /* This function, if defined, is called after all local symbols and
1048 global symbols converted to locals are emitted into the symtab
1049 section. It allows the backend to emit special local symbols
1050 not handled in the hash table. */
1051 bfd_boolean (*elf_backend_output_arch_local_syms
)
1052 (bfd
*, struct bfd_link_info
*, void *,
1053 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym
*, asection
*,
1054 struct elf_link_hash_entry
*));
1056 /* This function, if defined, is called after all symbols are emitted
1057 into the symtab section. It allows the backend to emit special
1058 global symbols not handled in the hash table. */
1059 bfd_boolean (*elf_backend_output_arch_syms
)
1060 (bfd
*, struct bfd_link_info
*, void *,
1061 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym
*, asection
*,
1062 struct elf_link_hash_entry
*));
1064 /* Copy any information related to dynamic linking from a pre-existing
1065 symbol to a newly created symbol. Also called to copy flags and
1066 other back-end info to a weakdef, in which case the symbol is not
1067 newly created and plt/got refcounts and dynamic indices should not
1069 void (*elf_backend_copy_indirect_symbol
)
1070 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
1071 struct elf_link_hash_entry
*);
1073 /* Modify any information related to dynamic linking such that the
1074 symbol is not exported. */
1075 void (*elf_backend_hide_symbol
)
1076 (struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd_boolean
);
1078 /* A function to do additional symbol fixup, called by
1079 _bfd_elf_fix_symbol_flags. */
1080 bfd_boolean (*elf_backend_fixup_symbol
)
1081 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
1083 /* Merge the backend specific symbol attribute. */
1084 void (*elf_backend_merge_symbol_attribute
)
1085 (struct elf_link_hash_entry
*, const Elf_Internal_Sym
*, bfd_boolean
,
1088 /* This function, if defined, will return a string containing the
1089 name of a target-specific dynamic tag. */
1090 char *(*elf_backend_get_target_dtag
)
1093 /* Decide whether an undefined symbol is special and can be ignored.
1094 This is the case for OPTIONAL symbols on IRIX. */
1095 bfd_boolean (*elf_backend_ignore_undef_symbol
)
1096 (struct elf_link_hash_entry
*);
1098 /* Emit relocations. Overrides default routine for emitting relocs,
1099 except during a relocatable link, or if all relocs are being emitted. */
1100 bfd_boolean (*elf_backend_emit_relocs
)
1101 (bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*,
1102 struct elf_link_hash_entry
**);
1104 /* Count relocations. Not called for relocatable links
1105 or if all relocs are being preserved in the output. */
1106 unsigned int (*elf_backend_count_relocs
)
1107 (struct bfd_link_info
*, asection
*);
1109 /* This function, if defined, is called when an NT_PRSTATUS note is found
1111 bfd_boolean (*elf_backend_grok_prstatus
)
1112 (bfd
*, Elf_Internal_Note
*);
1114 /* This function, if defined, is called when an NT_PSINFO or NT_PRPSINFO
1115 note is found in a core file. */
1116 bfd_boolean (*elf_backend_grok_psinfo
)
1117 (bfd
*, Elf_Internal_Note
*);
1119 /* This function, if defined, is called to write a note to a corefile. */
1120 char *(*elf_backend_write_core_note
)
1121 (bfd
*abfd
, char *buf
, int *bufsiz
, int note_type
, ...);
1123 /* This function, if defined, is called to convert target-specific
1124 section flag names into hex values. */
1125 flagword (*elf_backend_lookup_section_flags_hook
)
1128 /* This function returns class of a reloc type. */
1129 enum elf_reloc_type_class (*elf_backend_reloc_type_class
)
1130 (const struct bfd_link_info
*, const asection
*, const Elf_Internal_Rela
*);
1132 /* This function, if defined, removes information about discarded functions
1133 from other sections which mention them. */
1134 bfd_boolean (*elf_backend_discard_info
)
1135 (bfd
*, struct elf_reloc_cookie
*, struct bfd_link_info
*);
1137 /* This function, if defined, signals that the function above has removed
1138 the discarded relocations for this section. */
1139 bfd_boolean (*elf_backend_ignore_discarded_relocs
)
1142 /* What to do when ld finds relocations against symbols defined in
1143 discarded sections. */
1144 unsigned int (*action_discarded
)
1147 /* This function returns the width of FDE pointers in bytes, or 0 if
1148 that can't be determined for some reason. The default definition
1149 goes by the bfd's EI_CLASS. */
1150 unsigned int (*elf_backend_eh_frame_address_size
)
1151 (bfd
*, asection
*);
1153 /* These functions tell elf-eh-frame whether to attempt to turn
1154 absolute or lsda encodings into pc-relative ones. The default
1155 definition enables these transformations. */
1156 bfd_boolean (*elf_backend_can_make_relative_eh_frame
)
1157 (bfd
*, struct bfd_link_info
*, asection
*);
1158 bfd_boolean (*elf_backend_can_make_lsda_relative_eh_frame
)
1159 (bfd
*, struct bfd_link_info
*, asection
*);
1161 /* This function returns an encoding after computing the encoded
1162 value (and storing it in ENCODED) for the given OFFSET into OSEC,
1163 to be stored in at LOC_OFFSET into the LOC_SEC input section.
1164 The default definition chooses a 32-bit PC-relative encoding. */
1165 bfd_byte (*elf_backend_encode_eh_address
)
1166 (bfd
*abfd
, struct bfd_link_info
*info
,
1167 asection
*osec
, bfd_vma offset
,
1168 asection
*loc_sec
, bfd_vma loc_offset
,
1171 /* This function, if defined, may write out the given section.
1172 Returns TRUE if it did so and FALSE if the caller should. */
1173 bfd_boolean (*elf_backend_write_section
)
1174 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
1176 /* The level of IRIX compatibility we're striving for.
1177 MIPS ELF specific function. */
1178 irix_compat_t (*elf_backend_mips_irix_compat
)
1181 reloc_howto_type
*(*elf_backend_mips_rtype_to_howto
)
1182 (unsigned int, bfd_boolean
);
1184 /* The swapping table to use when dealing with ECOFF information.
1185 Used for the MIPS ELF .mdebug section. */
1186 const struct ecoff_debug_swap
*elf_backend_ecoff_debug_swap
;
1188 /* This function implements `bfd_elf_bfd_from_remote_memory';
1189 see elf.c, elfcode.h. */
1190 bfd
*(*elf_backend_bfd_from_remote_memory
)
1191 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
1192 int (*target_read_memory
) (bfd_vma vma
, bfd_byte
*myaddr
,
1193 bfd_size_type len
));
1195 /* This function is used by `_bfd_elf_get_synthetic_symtab';
1197 bfd_vma (*plt_sym_val
) (bfd_vma
, const asection
*, const arelent
*);
1199 /* Is symbol defined in common section? */
1200 bfd_boolean (*common_definition
) (Elf_Internal_Sym
*);
1202 /* Return a common section index for section. */
1203 unsigned int (*common_section_index
) (asection
*);
1205 /* Return a common section for section. */
1206 asection
*(*common_section
) (asection
*);
1208 /* Return TRUE if we can merge 2 definitions. */
1209 bfd_boolean (*merge_symbol
) (struct elf_link_hash_entry
*,
1210 const Elf_Internal_Sym
*, asection
**,
1211 bfd_boolean
, bfd_boolean
,
1212 bfd
*, const asection
*);
1214 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
1215 bfd_boolean (*elf_hash_symbol
) (struct elf_link_hash_entry
*);
1217 /* Return TRUE if type is a function symbol type. */
1218 bfd_boolean (*is_function_type
) (unsigned int type
);
1220 /* If the ELF symbol SYM might be a function in SEC, return the
1221 function size and set *CODE_OFF to the function's entry point,
1222 otherwise return zero. */
1223 bfd_size_type (*maybe_function_sym
) (const asymbol
*sym
, asection
*sec
,
1226 /* Used to handle bad SHF_LINK_ORDER input. */
1227 bfd_error_handler_type link_order_error_handler
;
1229 /* Name of the PLT relocation section. */
1230 const char *relplt_name
;
1232 /* Alternate EM_xxxx machine codes for this backend. */
1233 int elf_machine_alt1
;
1234 int elf_machine_alt2
;
1236 const struct elf_size_info
*s
;
1238 /* An array of target specific special sections. */
1239 const struct bfd_elf_special_section
*special_sections
;
1241 /* The size in bytes of the header for the GOT. This includes the
1242 so-called reserved entries on some systems. */
1243 bfd_vma got_header_size
;
1245 /* The size of the GOT entry for the symbol pointed to by H if non-NULL,
1246 otherwise by the local symbol with index SYMNDX in IBFD. */
1247 bfd_vma (*got_elt_size
) (bfd
*, struct bfd_link_info
*,
1248 struct elf_link_hash_entry
*h
,
1249 bfd
*ibfd
, unsigned long symndx
);
1251 /* The vendor name to use for a processor-standard attributes section. */
1252 const char *obj_attrs_vendor
;
1254 /* The section name to use for a processor-standard attributes section. */
1255 const char *obj_attrs_section
;
1257 /* Return 1, 2 or 3 to indicate what type of arguments a
1258 processor-specific tag takes. */
1259 int (*obj_attrs_arg_type
) (int);
1261 /* The section type to use for an attributes section. */
1262 unsigned int obj_attrs_section_type
;
1264 /* This function determines the order in which any attributes are
1265 written. It must be defined for input in the range
1266 LEAST_KNOWN_OBJ_ATTRIBUTE..NUM_KNOWN_OBJ_ATTRIBUTES-1 (this range
1267 is used in order to make unity easy). The returned value is the
1268 actual tag number to place in the input position. */
1269 int (*obj_attrs_order
) (int);
1271 /* Handle merging unknown attributes; either warn and return TRUE,
1272 or give an error and return FALSE. */
1273 bfd_boolean (*obj_attrs_handle_unknown
) (bfd
*, int);
1275 /* This is non-zero if static TLS segments require a special alignment. */
1276 unsigned static_tls_alignment
;
1278 /* Alignment for the PT_GNU_STACK segment. */
1279 unsigned stack_align
;
1281 /* This is TRUE if the linker should act like collect and gather
1282 global constructors and destructors by name. This is TRUE for
1283 MIPS ELF because the Irix 5 tools can not handle the .init
1285 unsigned collect
: 1;
1287 /* This is TRUE if the linker should ignore changes to the type of a
1288 symbol. This is TRUE for MIPS ELF because some Irix 5 objects
1289 record undefined functions as STT_OBJECT although the definitions
1291 unsigned type_change_ok
: 1;
1293 /* Whether the backend may use REL relocations. (Some backends use
1294 both REL and RELA relocations, and this flag is set for those
1296 unsigned may_use_rel_p
: 1;
1298 /* Whether the backend may use RELA relocations. (Some backends use
1299 both REL and RELA relocations, and this flag is set for those
1301 unsigned may_use_rela_p
: 1;
1303 /* Whether the default relocation type is RELA. If a backend with
1304 this flag set wants REL relocations for a particular section,
1305 it must note that explicitly. Similarly, if this flag is clear,
1306 and the backend wants RELA relocations for a particular
1308 unsigned default_use_rela_p
: 1;
1310 /* True if PLT and copy relocations should be RELA by default. */
1311 unsigned rela_plts_and_copies_p
: 1;
1313 /* Set if RELA relocations for a relocatable link can be handled by
1314 generic code. Backends that set this flag need do nothing in the
1315 backend relocate_section routine for relocatable linking. */
1316 unsigned rela_normal
: 1;
1318 /* TRUE if addresses "naturally" sign extend. This is used when
1319 swapping in from Elf32 when BFD64. */
1320 unsigned sign_extend_vma
: 1;
1322 unsigned want_got_plt
: 1;
1323 unsigned plt_readonly
: 1;
1324 unsigned want_plt_sym
: 1;
1325 unsigned plt_not_loaded
: 1;
1326 unsigned plt_alignment
: 4;
1327 unsigned can_gc_sections
: 1;
1328 unsigned can_refcount
: 1;
1329 unsigned want_got_sym
: 1;
1330 unsigned want_dynbss
: 1;
1332 /* Targets which do not support physical addressing often require
1333 that the p_paddr field in the section header to be set to zero.
1334 This field indicates whether this behavior is required. */
1335 unsigned want_p_paddr_set_to_zero
: 1;
1337 /* True if an object file lacking a .note.GNU-stack section
1338 should be assumed to be requesting exec stack. At least one
1339 other file in the link needs to have a .note.GNU-stack section
1340 for a PT_GNU_STACK segment to be created. */
1341 unsigned default_execstack
: 1;
1343 /* True if elf_section_data(sec)->this_hdr.contents is sec->rawsize
1344 in length rather than sec->size in length, if sec->rawsize is
1345 non-zero and smaller than sec->size. */
1346 unsigned caches_rawsize
: 1;
1349 /* Information about reloc sections associated with a bfd_elf_section_data
1351 struct bfd_elf_section_reloc_data
1353 /* The ELF header for the reloc section associated with this
1355 Elf_Internal_Shdr
*hdr
;
1356 /* The number of relocations currently assigned to HDR. */
1358 /* The ELF section number of the reloc section. Only used for an
1361 /* Used by the backend linker to store the symbol hash table entries
1362 associated with relocs against global symbols. */
1363 struct elf_link_hash_entry
**hashes
;
1366 /* Information stored for each BFD section in an ELF file. This
1367 structure is allocated by elf_new_section_hook. */
1369 struct bfd_elf_section_data
1371 /* The ELF header for this section. */
1372 Elf_Internal_Shdr this_hdr
;
1374 /* INPUT_SECTION_FLAGS if specified in the linker script. */
1375 struct flag_info
*section_flag_info
;
1377 /* Information about the REL and RELA reloc sections associated
1378 with this section, if any. */
1379 struct bfd_elf_section_reloc_data rel
, rela
;
1381 /* The ELF section number of this section. */
1384 /* Used by the backend linker when generating a shared library to
1385 record the dynamic symbol index for a section symbol
1386 corresponding to this section. A value of 0 means that there is
1387 no dynamic symbol for this section. */
1390 /* A pointer to the linked-to section for SHF_LINK_ORDER. */
1391 asection
*linked_to
;
1393 /* A pointer to the swapped relocs. If the section uses REL relocs,
1394 rather than RELA, all the r_addend fields will be zero. This
1395 pointer may be NULL. It is used by the backend linker. */
1396 Elf_Internal_Rela
*relocs
;
1398 /* A pointer to a linked list tracking dynamic relocs copied for
1402 /* A pointer to the bfd section used for dynamic relocs. */
1406 /* Group name, if this section is a member of a group. */
1409 /* Group signature sym, if this is the SHT_GROUP section. */
1410 struct bfd_symbol
*id
;
1413 /* For a member of a group, points to the SHT_GROUP section.
1414 NULL for the SHT_GROUP section itself and non-group sections. */
1415 asection
*sec_group
;
1417 /* A linked list of member sections in the group. Circular when used by
1418 the linker. For the SHT_GROUP section, points at first member. */
1419 asection
*next_in_group
;
1421 /* The FDEs associated with this section. The u.fde.next_in_section
1422 field acts as a chain pointer. */
1423 struct eh_cie_fde
*fde_list
;
1425 /* A pointer used for various section optimizations. */
1429 #define elf_section_data(sec) ((struct bfd_elf_section_data*)(sec)->used_by_bfd)
1430 #define elf_linked_to_section(sec) (elf_section_data(sec)->linked_to)
1431 #define elf_section_type(sec) (elf_section_data(sec)->this_hdr.sh_type)
1432 #define elf_section_flags(sec) (elf_section_data(sec)->this_hdr.sh_flags)
1433 #define elf_group_name(sec) (elf_section_data(sec)->group.name)
1434 #define elf_group_id(sec) (elf_section_data(sec)->group.id)
1435 #define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group)
1436 #define elf_fde_list(sec) (elf_section_data(sec)->fde_list)
1437 #define elf_sec_group(sec) (elf_section_data(sec)->sec_group)
1439 #define xvec_get_elf_backend_data(xvec) \
1440 ((const struct elf_backend_data *) (xvec)->backend_data)
1442 #define get_elf_backend_data(abfd) \
1443 xvec_get_elf_backend_data ((abfd)->xvec)
1445 /* The least object attributes (within an attributes subsection) known
1446 for any target. Some code assumes that the value 0 is not used and
1447 the field for that attribute can instead be used as a marker to
1448 indicate that attributes have been initialized. */
1449 #define LEAST_KNOWN_OBJ_ATTRIBUTE 2
1451 /* The maximum number of known object attributes for any target. */
1452 #define NUM_KNOWN_OBJ_ATTRIBUTES 71
1454 /* The value of an object attribute. The type indicates whether the attribute
1455 holds and integer, a string, or both. It can also indicate that there can
1456 be no default (i.e. all values must be written to file, even zero). */
1458 typedef struct obj_attribute
1460 #define ATTR_TYPE_FLAG_INT_VAL (1 << 0)
1461 #define ATTR_TYPE_FLAG_STR_VAL (1 << 1)
1462 #define ATTR_TYPE_FLAG_NO_DEFAULT (1 << 2)
1464 #define ATTR_TYPE_HAS_INT_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_INT_VAL)
1465 #define ATTR_TYPE_HAS_STR_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_STR_VAL)
1466 #define ATTR_TYPE_HAS_NO_DEFAULT(TYPE) ((TYPE) & ATTR_TYPE_FLAG_NO_DEFAULT)
1473 typedef struct obj_attribute_list
1475 struct obj_attribute_list
*next
;
1478 } obj_attribute_list
;
1480 /* Object attributes may either be defined by the processor ABI, index
1481 OBJ_ATTR_PROC in the *_obj_attributes arrays, or be GNU-specific
1482 (and possibly also processor-specific), index OBJ_ATTR_GNU. */
1483 #define OBJ_ATTR_PROC 0
1484 #define OBJ_ATTR_GNU 1
1485 #define OBJ_ATTR_FIRST OBJ_ATTR_PROC
1486 #define OBJ_ATTR_LAST OBJ_ATTR_GNU
1488 /* The following object attribute tags are taken as generic, for all
1489 targets and for "gnu" where there is no target standard. */
1496 Tag_compatibility
= 32
1499 /* The following struct stores information about every SystemTap section
1500 found in the object file. */
1503 struct sdt_note
*next
;
1508 /* NT_GNU_BUILD_ID note type info for input BFDs. */
1515 /* tdata information grabbed from an elf core file. */
1516 struct core_elf_obj_tdata
1525 /* Extra tdata information held for output ELF BFDs. */
1526 struct output_elf_obj_tdata
1528 struct elf_segment_map
*seg_map
;
1529 struct elf_strtab_hash
*strtab_ptr
;
1531 /* STT_SECTION symbols for each section */
1532 asymbol
**section_syms
;
1534 /* Used to determine if PT_GNU_EH_FRAME segment header should be
1536 asection
*eh_frame_hdr
;
1538 /* NT_GNU_BUILD_ID note type info. */
1541 bfd_boolean (*after_write_object_contents
) (bfd
*);
1546 /* Records the result of `get_program_header_size'. */
1547 bfd_size_type program_header_size
;
1549 /* Used when laying out sections. */
1550 file_ptr next_file_pos
;
1552 int num_section_syms
;
1553 unsigned int shstrtab_section
, strtab_section
;
1555 /* Segment flags for the PT_GNU_STACK segment. */
1556 unsigned int stack_flags
;
1558 /* This is set to TRUE if the object was created by the backend
1562 /* Used to determine if the e_flags field has been initialized */
1563 bfd_boolean flags_init
;
1566 /* Some private data is stashed away for future use using the tdata pointer
1567 in the bfd structure. */
1569 struct elf_obj_tdata
1571 Elf_Internal_Ehdr elf_header
[1]; /* Actual data, but ref like ptr */
1572 Elf_Internal_Shdr
**elf_sect_ptr
;
1573 Elf_Internal_Phdr
*phdr
;
1574 Elf_Internal_Shdr symtab_hdr
;
1575 Elf_Internal_Shdr shstrtab_hdr
;
1576 Elf_Internal_Shdr strtab_hdr
;
1577 Elf_Internal_Shdr dynsymtab_hdr
;
1578 Elf_Internal_Shdr dynstrtab_hdr
;
1579 Elf_Internal_Shdr dynversym_hdr
;
1580 Elf_Internal_Shdr dynverref_hdr
;
1581 Elf_Internal_Shdr dynverdef_hdr
;
1582 Elf_Internal_Shdr symtab_shndx_hdr
;
1583 bfd_vma gp
; /* The gp value */
1584 unsigned int gp_size
; /* The gp size */
1585 unsigned int num_elf_sections
; /* elf_sect_ptr size */
1587 /* A mapping from external symbols to entries in the linker hash
1588 table, used when linking. This is indexed by the symbol index
1589 minus the sh_info field of the symbol table header. */
1590 struct elf_link_hash_entry
**sym_hashes
;
1592 /* Track usage and final offsets of GOT entries for local symbols.
1593 This array is indexed by symbol index. Elements are used
1594 identically to "got" in struct elf_link_hash_entry. */
1597 bfd_signed_vma
*refcounts
;
1599 struct got_entry
**ents
;
1602 /* The linker ELF emulation code needs to let the backend ELF linker
1603 know what filename should be used for a dynamic object if the
1604 dynamic object is found using a search. The emulation code then
1605 sometimes needs to know what name was actually used. Until the
1606 file has been added to the linker symbol table, this field holds
1607 the name the linker wants. After it has been added, it holds the
1608 name actually used, which will be the DT_SONAME entry if there is
1610 const char *dt_name
;
1612 /* The linker emulation needs to know what audit libs
1613 are used by a dynamic object. */
1614 const char *dt_audit
;
1616 /* Used by find_nearest_line entry point. */
1619 /* A place to stash dwarf1 info for this bfd. */
1620 struct dwarf1_debug
*dwarf1_find_line_info
;
1622 /* A place to stash dwarf2 info for this bfd. */
1623 void *dwarf2_find_line_info
;
1625 /* Stash away info for yet another find line/function variant. */
1626 void *elf_find_function_cache
;
1628 /* Number of symbol version definitions we are about to emit. */
1629 unsigned int cverdefs
;
1631 /* Number of symbol version references we are about to emit. */
1632 unsigned int cverrefs
;
1634 /* Symbol version definitions in external objects. */
1635 Elf_Internal_Verdef
*verdef
;
1637 /* Symbol version references to external objects. */
1638 Elf_Internal_Verneed
*verref
;
1640 /* A pointer to the .eh_frame section. */
1641 asection
*eh_frame_section
;
1643 /* Symbol buffer. */
1646 obj_attribute known_obj_attributes
[2][NUM_KNOWN_OBJ_ATTRIBUTES
];
1647 obj_attribute_list
*other_obj_attributes
[2];
1649 /* NT_GNU_BUILD_ID note type. */
1650 struct elf_build_id
*build_id
;
1652 /* Linked-list containing information about every Systemtap section
1653 found in the object file. Each section corresponds to one entry
1655 struct sdt_note
*sdt_note_head
;
1657 Elf_Internal_Shdr
**group_sect_ptr
;
1660 unsigned int symtab_section
, symtab_shndx_section
, dynsymtab_section
;
1661 unsigned int dynversym_section
, dynverdef_section
, dynverref_section
;
1663 /* An identifier used to distinguish different target
1664 specific extensions to this structure. */
1665 enum elf_target_id object_id
;
1667 /* Whether a dyanmic object was specified normally on the linker
1668 command line, or was specified when --as-needed was in effect,
1669 or was found via a DT_NEEDED entry. */
1670 enum dynamic_lib_link_class dyn_lib_class
;
1672 /* Irix 5 often screws up the symbol table, sorting local symbols
1673 after global symbols. This flag is set if the symbol table in
1674 this BFD appears to be screwed up. If it is, we ignore the
1675 sh_info field in the symbol table header, and always read all the
1677 bfd_boolean bad_symtab
;
1679 /* True if the bfd contains symbols that have the STT_GNU_IFUNC
1680 symbol type or STB_GNU_UNIQUE binding. Used to set the osabi
1681 field in the ELF header structure. */
1682 bfd_boolean has_gnu_symbols
;
1684 /* Information grabbed from an elf core file. */
1685 struct core_elf_obj_tdata
*core
;
1687 /* More information held for output ELF BFDs. */
1688 struct output_elf_obj_tdata
*o
;
1691 #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
1693 #define elf_object_id(bfd) (elf_tdata(bfd) -> object_id)
1694 #define elf_program_header_size(bfd) (elf_tdata(bfd) -> o->program_header_size)
1695 #define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header)
1696 #define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr)
1697 #define elf_numsections(bfd) (elf_tdata(bfd) -> num_elf_sections)
1698 #define elf_seg_map(bfd) (elf_tdata(bfd) -> o->seg_map)
1699 #define elf_next_file_pos(bfd) (elf_tdata(bfd) -> o->next_file_pos)
1700 #define elf_eh_frame_hdr(bfd) (elf_tdata(bfd) -> o->eh_frame_hdr)
1701 #define elf_linker(bfd) (elf_tdata(bfd) -> o->linker)
1702 #define elf_stack_flags(bfd) (elf_tdata(bfd) -> o->stack_flags)
1703 #define elf_shstrtab(bfd) (elf_tdata(bfd) -> o->strtab_ptr)
1704 #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section)
1705 #define elf_symtab_shndx(bfd) (elf_tdata(bfd) -> symtab_shndx_section)
1706 #define elf_strtab_sec(bfd) (elf_tdata(bfd) -> o->strtab_section)
1707 #define elf_shstrtab_sec(bfd) (elf_tdata(bfd) -> o->shstrtab_section)
1708 #define elf_symtab_hdr(bfd) (elf_tdata(bfd) -> symtab_hdr)
1709 #define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section)
1710 #define elf_dynversym(bfd) (elf_tdata(bfd) -> dynversym_section)
1711 #define elf_dynverdef(bfd) (elf_tdata(bfd) -> dynverdef_section)
1712 #define elf_dynverref(bfd) (elf_tdata(bfd) -> dynverref_section)
1713 #define elf_eh_frame_section(bfd) \
1714 (elf_tdata(bfd) -> eh_frame_section)
1715 #define elf_section_syms(bfd) (elf_tdata(bfd) -> o->section_syms)
1716 #define elf_num_section_syms(bfd) (elf_tdata(bfd) -> o->num_section_syms)
1717 #define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
1718 #define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
1719 #define elf_gp(bfd) (elf_tdata(bfd) -> gp)
1720 #define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size)
1721 #define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes)
1722 #define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts)
1723 #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets)
1724 #define elf_local_got_ents(bfd) (elf_tdata(bfd) -> local_got.ents)
1725 #define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name)
1726 #define elf_dt_audit(bfd) (elf_tdata(bfd) -> dt_audit)
1727 #define elf_dyn_lib_class(bfd) (elf_tdata(bfd) -> dyn_lib_class)
1728 #define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab)
1729 #define elf_flags_init(bfd) (elf_tdata(bfd) -> o->flags_init)
1730 #define elf_known_obj_attributes(bfd) (elf_tdata (bfd) -> known_obj_attributes)
1731 #define elf_other_obj_attributes(bfd) (elf_tdata (bfd) -> other_obj_attributes)
1732 #define elf_known_obj_attributes_proc(bfd) \
1733 (elf_known_obj_attributes (bfd) [OBJ_ATTR_PROC])
1734 #define elf_other_obj_attributes_proc(bfd) \
1735 (elf_other_obj_attributes (bfd) [OBJ_ATTR_PROC])
1737 extern void _bfd_elf_swap_verdef_in
1738 (bfd
*, const Elf_External_Verdef
*, Elf_Internal_Verdef
*);
1739 extern void _bfd_elf_swap_verdef_out
1740 (bfd
*, const Elf_Internal_Verdef
*, Elf_External_Verdef
*);
1741 extern void _bfd_elf_swap_verdaux_in
1742 (bfd
*, const Elf_External_Verdaux
*, Elf_Internal_Verdaux
*);
1743 extern void _bfd_elf_swap_verdaux_out
1744 (bfd
*, const Elf_Internal_Verdaux
*, Elf_External_Verdaux
*);
1745 extern void _bfd_elf_swap_verneed_in
1746 (bfd
*, const Elf_External_Verneed
*, Elf_Internal_Verneed
*);
1747 extern void _bfd_elf_swap_verneed_out
1748 (bfd
*, const Elf_Internal_Verneed
*, Elf_External_Verneed
*);
1749 extern void _bfd_elf_swap_vernaux_in
1750 (bfd
*, const Elf_External_Vernaux
*, Elf_Internal_Vernaux
*);
1751 extern void _bfd_elf_swap_vernaux_out
1752 (bfd
*, const Elf_Internal_Vernaux
*, Elf_External_Vernaux
*);
1753 extern void _bfd_elf_swap_versym_in
1754 (bfd
*, const Elf_External_Versym
*, Elf_Internal_Versym
*);
1755 extern void _bfd_elf_swap_versym_out
1756 (bfd
*, const Elf_Internal_Versym
*, Elf_External_Versym
*);
1758 extern unsigned int _bfd_elf_section_from_bfd_section
1759 (bfd
*, asection
*);
1760 extern char *bfd_elf_string_from_elf_section
1761 (bfd
*, unsigned, unsigned);
1762 extern Elf_Internal_Sym
*bfd_elf_get_elf_syms
1763 (bfd
*, Elf_Internal_Shdr
*, size_t, size_t, Elf_Internal_Sym
*, void *,
1764 Elf_External_Sym_Shndx
*);
1765 extern const char *bfd_elf_sym_name
1766 (bfd
*, Elf_Internal_Shdr
*, Elf_Internal_Sym
*, asection
*);
1768 extern bfd_boolean _bfd_elf_copy_private_bfd_data
1770 extern bfd_boolean _bfd_elf_print_private_bfd_data
1772 extern void bfd_elf_print_symbol
1773 (bfd
*, void *, asymbol
*, bfd_print_symbol_type
);
1775 extern unsigned int _bfd_elf_eh_frame_address_size
1776 (bfd
*, asection
*);
1777 extern bfd_byte _bfd_elf_encode_eh_address
1778 (bfd
*abfd
, struct bfd_link_info
*info
, asection
*osec
, bfd_vma offset
,
1779 asection
*loc_sec
, bfd_vma loc_offset
, bfd_vma
*encoded
);
1780 extern bfd_boolean _bfd_elf_can_make_relative
1781 (bfd
*input_bfd
, struct bfd_link_info
*info
, asection
*eh_frame_section
);
1783 extern enum elf_reloc_type_class _bfd_elf_reloc_type_class
1784 (const struct bfd_link_info
*, const asection
*,
1785 const Elf_Internal_Rela
*);
1786 extern bfd_vma _bfd_elf_rela_local_sym
1787 (bfd
*, Elf_Internal_Sym
*, asection
**, Elf_Internal_Rela
*);
1788 extern bfd_vma _bfd_elf_rel_local_sym
1789 (bfd
*, Elf_Internal_Sym
*, asection
**, bfd_vma
);
1790 extern bfd_vma _bfd_elf_section_offset
1791 (bfd
*, struct bfd_link_info
*, asection
*, bfd_vma
);
1793 extern unsigned long bfd_elf_hash
1795 extern unsigned long bfd_elf_gnu_hash
1798 extern bfd_reloc_status_type bfd_elf_generic_reloc
1799 (bfd
*, arelent
*, asymbol
*, void *, asection
*, bfd
*, char **);
1800 extern bfd_boolean bfd_elf_allocate_object
1801 (bfd
*, size_t, enum elf_target_id
);
1802 extern bfd_boolean bfd_elf_make_object
1804 extern bfd_boolean bfd_elf_mkcorefile
1806 extern bfd_boolean _bfd_elf_make_section_from_shdr
1807 (bfd
*, Elf_Internal_Shdr
*, const char *, int);
1808 extern bfd_boolean _bfd_elf_make_section_from_phdr
1809 (bfd
*, Elf_Internal_Phdr
*, int, const char *);
1810 extern struct bfd_hash_entry
*_bfd_elf_link_hash_newfunc
1811 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *);
1812 extern struct bfd_link_hash_table
*_bfd_elf_link_hash_table_create
1814 extern void _bfd_elf_link_hash_table_free
1816 extern void _bfd_elf_link_hash_copy_indirect
1817 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
1818 struct elf_link_hash_entry
*);
1819 extern void _bfd_elf_link_hash_hide_symbol
1820 (struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd_boolean
);
1821 extern bfd_boolean _bfd_elf_link_hash_fixup_symbol
1822 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
1823 extern bfd_boolean _bfd_elf_link_hash_table_init
1824 (struct elf_link_hash_table
*, bfd
*,
1825 struct bfd_hash_entry
*(*)
1826 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *),
1827 unsigned int, enum elf_target_id
);
1828 extern bfd_boolean _bfd_elf_slurp_version_tables
1829 (bfd
*, bfd_boolean
);
1830 extern bfd_boolean _bfd_elf_merge_sections
1831 (bfd
*, struct bfd_link_info
*);
1832 extern bfd_boolean _bfd_elf_match_sections_by_type
1833 (bfd
*, const asection
*, bfd
*, const asection
*);
1834 extern bfd_boolean bfd_elf_is_group_section
1835 (bfd
*, const struct bfd_section
*);
1836 extern bfd_boolean _bfd_elf_section_already_linked
1837 (bfd
*, asection
*, struct bfd_link_info
*);
1838 extern void bfd_elf_set_group_contents
1839 (bfd
*, asection
*, void *);
1840 extern asection
*_bfd_elf_check_kept_section
1841 (asection
*, struct bfd_link_info
*);
1842 #define _bfd_elf_link_just_syms _bfd_generic_link_just_syms
1843 extern void _bfd_elf_copy_link_hash_symbol_type
1844 (bfd
*, struct bfd_link_hash_entry
*, struct bfd_link_hash_entry
*);
1845 extern bfd_boolean _bfd_elf_size_group_sections
1846 (struct bfd_link_info
*);
1847 extern bfd_boolean _bfd_elf_fixup_group_sections
1848 (bfd
*, asection
*);
1849 extern bfd_boolean _bfd_elf_copy_private_header_data
1851 extern bfd_boolean _bfd_elf_copy_private_symbol_data
1852 (bfd
*, asymbol
*, bfd
*, asymbol
*);
1853 #define _bfd_generic_init_private_section_data \
1854 _bfd_elf_init_private_section_data
1855 extern bfd_boolean _bfd_elf_init_private_section_data
1856 (bfd
*, asection
*, bfd
*, asection
*, struct bfd_link_info
*);
1857 extern bfd_boolean _bfd_elf_copy_private_section_data
1858 (bfd
*, asection
*, bfd
*, asection
*);
1859 extern bfd_boolean _bfd_elf_write_object_contents
1861 extern bfd_boolean _bfd_elf_write_corefile_contents
1863 extern bfd_boolean _bfd_elf_set_section_contents
1864 (bfd
*, sec_ptr
, const void *, file_ptr
, bfd_size_type
);
1865 extern long _bfd_elf_get_symtab_upper_bound
1867 extern long _bfd_elf_canonicalize_symtab
1868 (bfd
*, asymbol
**);
1869 extern long _bfd_elf_get_dynamic_symtab_upper_bound
1871 extern long _bfd_elf_canonicalize_dynamic_symtab
1872 (bfd
*, asymbol
**);
1873 extern long _bfd_elf_get_synthetic_symtab
1874 (bfd
*, long, asymbol
**, long, asymbol
**, asymbol
**);
1875 extern long _bfd_elf_get_reloc_upper_bound
1877 extern long _bfd_elf_canonicalize_reloc
1878 (bfd
*, sec_ptr
, arelent
**, asymbol
**);
1879 extern asection
* _bfd_elf_get_dynamic_reloc_section
1880 (bfd
*, asection
*, bfd_boolean
);
1881 extern asection
* _bfd_elf_make_dynamic_reloc_section
1882 (asection
*, bfd
*, unsigned int, bfd
*, bfd_boolean
);
1883 extern long _bfd_elf_get_dynamic_reloc_upper_bound
1885 extern long _bfd_elf_canonicalize_dynamic_reloc
1886 (bfd
*, arelent
**, asymbol
**);
1887 extern asymbol
*_bfd_elf_make_empty_symbol
1889 extern void _bfd_elf_get_symbol_info
1890 (bfd
*, asymbol
*, symbol_info
*);
1891 extern bfd_boolean _bfd_elf_is_local_label_name
1892 (bfd
*, const char *);
1893 extern alent
*_bfd_elf_get_lineno
1895 extern bfd_boolean _bfd_elf_set_arch_mach
1896 (bfd
*, enum bfd_architecture
, unsigned long);
1897 extern bfd_boolean _bfd_elf_find_nearest_line
1898 (bfd
*, asection
*, asymbol
**, bfd_vma
, const char **, const char **,
1900 extern bfd_boolean _bfd_elf_find_nearest_line_discriminator
1901 (bfd
*, asection
*, asymbol
**, bfd_vma
, const char **, const char **,
1902 unsigned int *, unsigned int *);
1903 extern bfd_boolean _bfd_elf_find_line
1904 (bfd
*, asymbol
**, asymbol
*, const char **, unsigned int *);
1905 extern bfd_boolean _bfd_elf_find_line_discriminator
1906 (bfd
*, asymbol
**, asymbol
*, const char **, unsigned int *, unsigned int *);
1907 #define _bfd_generic_find_line _bfd_elf_find_line
1908 #define _bfd_generic_find_nearest_line_discriminator \
1909 _bfd_elf_find_nearest_line_discriminator
1910 extern bfd_boolean _bfd_elf_find_inliner_info
1911 (bfd
*, const char **, const char **, unsigned int *);
1912 #define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols
1913 #define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
1914 extern int _bfd_elf_sizeof_headers
1915 (bfd
*, struct bfd_link_info
*);
1916 extern bfd_boolean _bfd_elf_new_section_hook
1917 (bfd
*, asection
*);
1918 extern const struct bfd_elf_special_section
*_bfd_elf_get_special_section
1919 (const char *, const struct bfd_elf_special_section
*, unsigned int);
1920 extern const struct bfd_elf_special_section
*_bfd_elf_get_sec_type_attr
1921 (bfd
*, asection
*);
1923 /* If the target doesn't have reloc handling written yet: */
1924 extern void _bfd_elf_no_info_to_howto
1925 (bfd
*, arelent
*, Elf_Internal_Rela
*);
1927 extern bfd_boolean bfd_section_from_shdr
1928 (bfd
*, unsigned int shindex
);
1929 extern bfd_boolean bfd_section_from_phdr
1930 (bfd
*, Elf_Internal_Phdr
*, int);
1932 extern int _bfd_elf_symbol_from_bfd_symbol
1933 (bfd
*, asymbol
**);
1935 extern Elf_Internal_Sym
*bfd_sym_from_r_symndx
1936 (struct sym_cache
*, bfd
*, unsigned long);
1937 extern asection
*bfd_section_from_elf_index
1938 (bfd
*, unsigned int);
1939 extern struct bfd_strtab_hash
*_bfd_elf_stringtab_init
1942 extern struct elf_strtab_hash
* _bfd_elf_strtab_init
1944 extern void _bfd_elf_strtab_free
1945 (struct elf_strtab_hash
*);
1946 extern bfd_size_type _bfd_elf_strtab_add
1947 (struct elf_strtab_hash
*, const char *, bfd_boolean
);
1948 extern void _bfd_elf_strtab_addref
1949 (struct elf_strtab_hash
*, bfd_size_type
);
1950 extern void _bfd_elf_strtab_delref
1951 (struct elf_strtab_hash
*, bfd_size_type
);
1952 extern unsigned int _bfd_elf_strtab_refcount
1953 (struct elf_strtab_hash
*, bfd_size_type
);
1954 extern void _bfd_elf_strtab_clear_all_refs
1955 (struct elf_strtab_hash
*tab
);
1956 extern void _bfd_elf_strtab_restore_size
1957 (struct elf_strtab_hash
*, bfd_size_type
);
1958 extern bfd_size_type _bfd_elf_strtab_size
1959 (struct elf_strtab_hash
*);
1960 extern bfd_size_type _bfd_elf_strtab_offset
1961 (struct elf_strtab_hash
*, bfd_size_type
);
1962 extern bfd_boolean _bfd_elf_strtab_emit
1963 (bfd
*, struct elf_strtab_hash
*);
1964 extern void _bfd_elf_strtab_finalize
1965 (struct elf_strtab_hash
*);
1967 extern void _bfd_elf_parse_eh_frame
1968 (bfd
*, struct bfd_link_info
*, asection
*, struct elf_reloc_cookie
*);
1969 extern bfd_boolean _bfd_elf_discard_section_eh_frame
1970 (bfd
*, struct bfd_link_info
*, asection
*,
1971 bfd_boolean (*) (bfd_vma
, void *), struct elf_reloc_cookie
*);
1972 extern bfd_boolean _bfd_elf_discard_section_eh_frame_hdr
1973 (bfd
*, struct bfd_link_info
*);
1974 extern bfd_vma _bfd_elf_eh_frame_section_offset
1975 (bfd
*, struct bfd_link_info
*, asection
*, bfd_vma
);
1976 extern bfd_boolean _bfd_elf_write_section_eh_frame
1977 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
1978 extern bfd_boolean _bfd_elf_write_section_eh_frame_hdr
1979 (bfd
*, struct bfd_link_info
*);
1980 extern bfd_boolean _bfd_elf_eh_frame_present
1981 (struct bfd_link_info
*);
1982 extern bfd_boolean _bfd_elf_maybe_strip_eh_frame_hdr
1983 (struct bfd_link_info
*);
1985 extern bfd_boolean
_bfd_elf_hash_symbol (struct elf_link_hash_entry
*);
1987 extern long _bfd_elf_link_lookup_local_dynindx
1988 (struct bfd_link_info
*, bfd
*, long);
1989 extern bfd_boolean _bfd_elf_compute_section_file_positions
1990 (bfd
*, struct bfd_link_info
*);
1991 extern void _bfd_elf_assign_file_positions_for_relocs
1993 extern file_ptr _bfd_elf_assign_file_position_for_section
1994 (Elf_Internal_Shdr
*, file_ptr
, bfd_boolean
);
1996 extern bfd_boolean _bfd_elf_validate_reloc
1999 extern bfd_boolean _bfd_elf_link_create_dynamic_sections
2000 (bfd
*, struct bfd_link_info
*);
2001 extern bfd_boolean _bfd_elf_link_omit_section_dynsym
2002 (bfd
*, struct bfd_link_info
*, asection
*);
2003 extern bfd_boolean _bfd_elf_create_dynamic_sections
2004 (bfd
*, struct bfd_link_info
*);
2005 extern bfd_boolean _bfd_elf_create_got_section
2006 (bfd
*, struct bfd_link_info
*);
2007 extern struct elf_link_hash_entry
*_bfd_elf_define_linkage_sym
2008 (bfd
*, struct bfd_link_info
*, asection
*, const char *);
2009 extern void _bfd_elf_init_1_index_section
2010 (bfd
*, struct bfd_link_info
*);
2011 extern void _bfd_elf_init_2_index_sections
2012 (bfd
*, struct bfd_link_info
*);
2014 extern bfd_boolean _bfd_elfcore_make_pseudosection
2015 (bfd
*, char *, size_t, ufile_ptr
);
2016 extern char *_bfd_elfcore_strndup
2017 (bfd
*, char *, size_t);
2019 extern Elf_Internal_Rela
*_bfd_elf_link_read_relocs
2020 (bfd
*, asection
*, void *, Elf_Internal_Rela
*, bfd_boolean
);
2022 extern bfd_boolean _bfd_elf_link_output_relocs
2023 (bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*,
2024 struct elf_link_hash_entry
**);
2026 extern bfd_boolean _bfd_elf_adjust_dynamic_copy
2027 (struct elf_link_hash_entry
*, asection
*);
2029 extern bfd_boolean _bfd_elf_dynamic_symbol_p
2030 (struct elf_link_hash_entry
*, struct bfd_link_info
*, bfd_boolean
);
2032 extern bfd_boolean _bfd_elf_symbol_refs_local_p
2033 (struct elf_link_hash_entry
*, struct bfd_link_info
*, bfd_boolean
);
2035 extern bfd_reloc_status_type bfd_elf_perform_complex_relocation
2036 (bfd
*, asection
*, bfd_byte
*, Elf_Internal_Rela
*, bfd_vma
);
2038 extern bfd_boolean _bfd_elf_setup_sections
2041 extern void _bfd_elf_post_process_headers (bfd
* , struct bfd_link_info
*);
2043 extern const bfd_target
*bfd_elf32_object_p
2045 extern const bfd_target
*bfd_elf32_core_file_p
2047 extern char *bfd_elf32_core_file_failing_command
2049 extern int bfd_elf32_core_file_failing_signal
2051 extern bfd_boolean bfd_elf32_core_file_matches_executable_p
2053 extern int bfd_elf32_core_file_pid
2056 extern bfd_boolean bfd_elf32_swap_symbol_in
2057 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
2058 extern void bfd_elf32_swap_symbol_out
2059 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
2060 extern void bfd_elf32_swap_reloc_in
2061 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2062 extern void bfd_elf32_swap_reloc_out
2063 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2064 extern void bfd_elf32_swap_reloca_in
2065 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2066 extern void bfd_elf32_swap_reloca_out
2067 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2068 extern void bfd_elf32_swap_phdr_in
2069 (bfd
*, const Elf32_External_Phdr
*, Elf_Internal_Phdr
*);
2070 extern void bfd_elf32_swap_phdr_out
2071 (bfd
*, const Elf_Internal_Phdr
*, Elf32_External_Phdr
*);
2072 extern void bfd_elf32_swap_dyn_in
2073 (bfd
*, const void *, Elf_Internal_Dyn
*);
2074 extern void bfd_elf32_swap_dyn_out
2075 (bfd
*, const Elf_Internal_Dyn
*, void *);
2076 extern long bfd_elf32_slurp_symbol_table
2077 (bfd
*, asymbol
**, bfd_boolean
);
2078 extern bfd_boolean bfd_elf32_write_shdrs_and_ehdr
2080 extern int bfd_elf32_write_out_phdrs
2081 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
2082 extern bfd_boolean bfd_elf32_checksum_contents
2083 (bfd
* , void (*) (const void *, size_t, void *), void *);
2084 extern void bfd_elf32_write_relocs
2085 (bfd
*, asection
*, void *);
2086 extern bfd_boolean bfd_elf32_slurp_reloc_table
2087 (bfd
*, asection
*, asymbol
**, bfd_boolean
);
2089 extern const bfd_target
*bfd_elf64_object_p
2091 extern const bfd_target
*bfd_elf64_core_file_p
2093 extern char *bfd_elf64_core_file_failing_command
2095 extern int bfd_elf64_core_file_failing_signal
2097 extern bfd_boolean bfd_elf64_core_file_matches_executable_p
2099 extern int bfd_elf64_core_file_pid
2102 extern bfd_boolean bfd_elf64_swap_symbol_in
2103 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
2104 extern void bfd_elf64_swap_symbol_out
2105 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
2106 extern void bfd_elf64_swap_reloc_in
2107 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2108 extern void bfd_elf64_swap_reloc_out
2109 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2110 extern void bfd_elf64_swap_reloca_in
2111 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2112 extern void bfd_elf64_swap_reloca_out
2113 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2114 extern void bfd_elf64_swap_phdr_in
2115 (bfd
*, const Elf64_External_Phdr
*, Elf_Internal_Phdr
*);
2116 extern void bfd_elf64_swap_phdr_out
2117 (bfd
*, const Elf_Internal_Phdr
*, Elf64_External_Phdr
*);
2118 extern void bfd_elf64_swap_dyn_in
2119 (bfd
*, const void *, Elf_Internal_Dyn
*);
2120 extern void bfd_elf64_swap_dyn_out
2121 (bfd
*, const Elf_Internal_Dyn
*, void *);
2122 extern long bfd_elf64_slurp_symbol_table
2123 (bfd
*, asymbol
**, bfd_boolean
);
2124 extern bfd_boolean bfd_elf64_write_shdrs_and_ehdr
2126 extern int bfd_elf64_write_out_phdrs
2127 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
2128 extern bfd_boolean bfd_elf64_checksum_contents
2129 (bfd
* , void (*) (const void *, size_t, void *), void *);
2130 extern void bfd_elf64_write_relocs
2131 (bfd
*, asection
*, void *);
2132 extern bfd_boolean bfd_elf64_slurp_reloc_table
2133 (bfd
*, asection
*, asymbol
**, bfd_boolean
);
2135 extern bfd_boolean _bfd_elf_default_relocs_compatible
2136 (const bfd_target
*, const bfd_target
*);
2138 extern bfd_boolean _bfd_elf_relocs_compatible
2139 (const bfd_target
*, const bfd_target
*);
2140 extern bfd_boolean _bfd_elf_notice_as_needed
2141 (bfd
*, struct bfd_link_info
*, enum notice_asneeded_action
);
2143 extern struct elf_link_hash_entry
*_bfd_elf_archive_symbol_lookup
2144 (bfd
*, struct bfd_link_info
*, const char *);
2145 extern bfd_boolean bfd_elf_link_add_symbols
2146 (bfd
*, struct bfd_link_info
*);
2147 extern bfd_boolean _bfd_elf_add_dynamic_entry
2148 (struct bfd_link_info
*, bfd_vma
, bfd_vma
);
2150 extern bfd_boolean bfd_elf_link_record_dynamic_symbol
2151 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
2153 extern int bfd_elf_link_record_local_dynamic_symbol
2154 (struct bfd_link_info
*, bfd
*, long);
2156 extern bfd_boolean _bfd_elf_close_and_cleanup
2159 extern bfd_boolean _bfd_elf_common_definition
2160 (Elf_Internal_Sym
*);
2162 extern unsigned int _bfd_elf_common_section_index
2165 extern asection
*_bfd_elf_common_section
2168 extern bfd_vma _bfd_elf_default_got_elt_size
2169 (bfd
*, struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd
*,
2172 extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn
2173 (bfd
*, arelent
*, struct bfd_symbol
*, void *,
2174 asection
*, bfd
*, char **);
2176 extern bfd_boolean bfd_elf_final_link
2177 (bfd
*, struct bfd_link_info
*);
2179 extern void _bfd_elf_gc_keep
2180 (struct bfd_link_info
*info
);
2182 extern bfd_boolean bfd_elf_gc_mark_dynamic_ref_symbol
2183 (struct elf_link_hash_entry
*h
, void *inf
);
2185 extern bfd_boolean bfd_elf_gc_sections
2186 (bfd
*, struct bfd_link_info
*);
2188 extern bfd_boolean bfd_elf_gc_record_vtinherit
2189 (bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
);
2191 extern bfd_boolean bfd_elf_gc_record_vtentry
2192 (bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
);
2194 extern asection
*_bfd_elf_gc_mark_hook
2195 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
2196 struct elf_link_hash_entry
*, Elf_Internal_Sym
*);
2198 extern asection
*_bfd_elf_gc_mark_rsec
2199 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
,
2200 struct elf_reloc_cookie
*);
2202 extern bfd_boolean _bfd_elf_gc_mark_reloc
2203 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
,
2204 struct elf_reloc_cookie
*);
2206 extern bfd_boolean _bfd_elf_gc_mark_fdes
2207 (struct bfd_link_info
*, asection
*, asection
*, elf_gc_mark_hook_fn
,
2208 struct elf_reloc_cookie
*);
2210 extern bfd_boolean _bfd_elf_gc_mark
2211 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
);
2213 extern bfd_boolean _bfd_elf_gc_mark_extra_sections
2214 (struct bfd_link_info
*, elf_gc_mark_hook_fn
);
2216 extern bfd_boolean bfd_elf_gc_common_finalize_got_offsets
2217 (bfd
*, struct bfd_link_info
*);
2219 extern bfd_boolean bfd_elf_gc_common_final_link
2220 (bfd
*, struct bfd_link_info
*);
2222 extern bfd_boolean bfd_elf_reloc_symbol_deleted_p
2225 extern struct elf_segment_map
* _bfd_elf_make_dynamic_segment
2226 (bfd
*, asection
*);
2228 extern bfd_boolean _bfd_elf_map_sections_to_segments
2229 (bfd
*, struct bfd_link_info
*);
2231 extern bfd_boolean
_bfd_elf_is_function_type (unsigned int);
2233 extern bfd_size_type
_bfd_elf_maybe_function_sym (const asymbol
*, asection
*,
2236 extern int bfd_elf_get_default_section_type (flagword
);
2238 extern bfd_boolean bfd_elf_lookup_section_flags
2239 (struct bfd_link_info
*, struct flag_info
*, asection
*);
2241 extern Elf_Internal_Phdr
* _bfd_elf_find_segment_containing_section
2242 (bfd
* abfd
, asection
* section
);
2244 /* Exported interface for writing elf corefile notes. */
2245 extern char *elfcore_write_note
2246 (bfd
*, char *, int *, const char *, int, const void *, int);
2247 extern char *elfcore_write_prpsinfo
2248 (bfd
*, char *, int *, const char *, const char *);
2249 extern char *elfcore_write_prstatus
2250 (bfd
*, char *, int *, long, int, const void *);
2251 extern char * elfcore_write_pstatus
2252 (bfd
*, char *, int *, long, int, const void *);
2253 extern char *elfcore_write_prfpreg
2254 (bfd
*, char *, int *, const void *, int);
2255 extern char *elfcore_write_prxfpreg
2256 (bfd
*, char *, int *, const void *, int);
2257 extern char *elfcore_write_xstatereg
2258 (bfd
*, char *, int *, const void *, int);
2259 extern char *elfcore_write_ppc_vmx
2260 (bfd
*, char *, int *, const void *, int);
2261 extern char *elfcore_write_ppc_vsx
2262 (bfd
*, char *, int *, const void *, int);
2263 extern char *elfcore_write_s390_timer
2264 (bfd
*, char *, int *, const void *, int);
2265 extern char *elfcore_write_s390_todcmp
2266 (bfd
*, char *, int *, const void *, int);
2267 extern char *elfcore_write_s390_todpreg
2268 (bfd
*, char *, int *, const void *, int);
2269 extern char *elfcore_write_s390_ctrs
2270 (bfd
*, char *, int *, const void *, int);
2271 extern char *elfcore_write_s390_prefix
2272 (bfd
*, char *, int *, const void *, int);
2273 extern char *elfcore_write_s390_last_break
2274 (bfd
*, char *, int *, const void *, int);
2275 extern char *elfcore_write_s390_system_call
2276 (bfd
*, char *, int *, const void *, int);
2277 extern char *elfcore_write_s390_tdb
2278 (bfd
*, char *, int *, const void *, int);
2279 extern char *elfcore_write_arm_vfp
2280 (bfd
*, char *, int *, const void *, int);
2281 extern char *elfcore_write_aarch_tls
2282 (bfd
*, char *, int *, const void *, int);
2283 extern char *elfcore_write_aarch_hw_break
2284 (bfd
*, char *, int *, const void *, int);
2285 extern char *elfcore_write_aarch_hw_watch
2286 (bfd
*, char *, int *, const void *, int);
2287 extern char *elfcore_write_lwpstatus
2288 (bfd
*, char *, int *, long, int, const void *);
2289 extern char *elfcore_write_register_note
2290 (bfd
*, char *, int *, const char *, const void *, int);
2292 /* Internal structure which holds information to be included in the
2293 PRPSINFO section of Linux core files.
2295 This is an "internal" structure in the sense that it should be used
2296 to pass information to BFD (via the `elfcore_write_linux_prpsinfo'
2297 function), so things like endianess shouldn't be an issue. This
2298 structure will eventually be converted in one of the
2299 `elf_external_linux_*' structures and written out to an output bfd
2300 by one of the functions declared below. */
2302 struct elf_internal_linux_prpsinfo
2304 char pr_state
; /* Numeric process state. */
2305 char pr_sname
; /* Char for pr_state. */
2306 char pr_zomb
; /* Zombie. */
2307 char pr_nice
; /* Nice val. */
2308 unsigned long pr_flag
; /* Flags. */
2309 unsigned int pr_uid
;
2310 unsigned int pr_gid
;
2311 int pr_pid
, pr_ppid
, pr_pgrp
, pr_sid
;
2312 char pr_fname
[16 + 1]; /* Filename of executable. */
2313 char pr_psargs
[80 + 1]; /* Initial part of arg list. */
2316 /* Linux/most 32-bit archs. */
2317 extern char *elfcore_write_linux_prpsinfo32
2318 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
2320 /* Linux/most 64-bit archs. */
2321 extern char *elfcore_write_linux_prpsinfo64
2322 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
2324 /* Linux/PPC32 uses different layout compared to most archs. */
2325 extern char *elfcore_write_ppc_linux_prpsinfo32
2326 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
2328 extern bfd
*_bfd_elf32_bfd_from_remote_memory
2329 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
2330 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, bfd_size_type
));
2331 extern bfd
*_bfd_elf64_bfd_from_remote_memory
2332 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
2333 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, bfd_size_type
));
2335 extern bfd_vma
bfd_elf_obj_attr_size (bfd
*);
2336 extern void bfd_elf_set_obj_attr_contents (bfd
*, bfd_byte
*, bfd_vma
);
2337 extern int bfd_elf_get_obj_attr_int (bfd
*, int, int);
2338 extern void bfd_elf_add_obj_attr_int (bfd
*, int, int, unsigned int);
2339 #define bfd_elf_add_proc_attr_int(BFD, TAG, VALUE) \
2340 bfd_elf_add_obj_attr_int ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2341 extern void bfd_elf_add_obj_attr_string (bfd
*, int, int, const char *);
2342 #define bfd_elf_add_proc_attr_string(BFD, TAG, VALUE) \
2343 bfd_elf_add_obj_attr_string ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2344 extern void bfd_elf_add_obj_attr_int_string (bfd
*, int, int, unsigned int,
2346 #define bfd_elf_add_proc_attr_int_string(BFD, TAG, INTVAL, STRVAL) \
2347 bfd_elf_add_obj_attr_int_string ((BFD), OBJ_ATTR_PROC, (TAG), \
2350 extern char *_bfd_elf_attr_strdup (bfd
*, const char *);
2351 extern void _bfd_elf_copy_obj_attributes (bfd
*, bfd
*);
2352 extern int _bfd_elf_obj_attrs_arg_type (bfd
*, int, int);
2353 extern void _bfd_elf_parse_attributes (bfd
*, Elf_Internal_Shdr
*);
2354 extern bfd_boolean
_bfd_elf_merge_object_attributes (bfd
*, bfd
*);
2355 extern bfd_boolean
_bfd_elf_merge_unknown_attribute_low (bfd
*, bfd
*, int);
2356 extern bfd_boolean
_bfd_elf_merge_unknown_attribute_list (bfd
*, bfd
*);
2357 extern Elf_Internal_Shdr
*_bfd_elf_single_rel_hdr (asection
*sec
);
2359 /* The linker may need to keep track of the number of relocs that it
2360 decides to copy as dynamic relocs in check_relocs for each symbol.
2361 This is so that it can later discard them if they are found to be
2362 unnecessary. We can store the information in a field extending the
2363 regular ELF linker hash table. */
2365 struct elf_dyn_relocs
2367 struct elf_dyn_relocs
*next
;
2369 /* The input section of the reloc. */
2372 /* Total number of relocs copied for the input section. */
2373 bfd_size_type count
;
2375 /* Number of pc-relative relocs copied for the input section. */
2376 bfd_size_type pc_count
;
2379 extern bfd_boolean _bfd_elf_create_ifunc_sections
2380 (bfd
*, struct bfd_link_info
*);
2381 extern bfd_boolean _bfd_elf_allocate_ifunc_dyn_relocs
2382 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
2383 struct elf_dyn_relocs
**, unsigned int, unsigned int, unsigned int);
2385 extern void elf_append_rela (bfd
*, asection
*, Elf_Internal_Rela
*);
2386 extern void elf_append_rel (bfd
*, asection
*, Elf_Internal_Rela
*);
2388 extern bfd_vma
elf64_r_info (bfd_vma
, bfd_vma
);
2389 extern bfd_vma
elf64_r_sym (bfd_vma
);
2390 extern bfd_vma
elf32_r_info (bfd_vma
, bfd_vma
);
2391 extern bfd_vma
elf32_r_sym (bfd_vma
);
2393 /* Large common section. */
2394 extern asection _bfd_elf_large_com_section
;
2396 /* Hash for local symbol with the first section id, ID, in the input
2397 file and the local symbol index, SYM. */
2398 #define ELF_LOCAL_SYMBOL_HASH(ID, SYM) \
2399 (((((ID) & 0xff) << 24) | (((ID) & 0xff00) << 8)) \
2400 ^ (SYM) ^ ((ID) >> 16))
2402 /* This is the condition under which finish_dynamic_symbol will be called.
2403 If our finish_dynamic_symbol isn't called, we'll need to do something
2404 about initializing any .plt and .got entries in relocate_section. */
2405 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
2407 && ((SHARED) || !(H)->forced_local) \
2408 && ((H)->dynindx != -1 || (H)->forced_local))
2410 /* This macro is to avoid lots of duplicated code in the body
2411 of xxx_relocate_section() in the various elfxx-xxxx.c files. */
2412 #define RELOC_FOR_GLOBAL_SYMBOL(info, input_bfd, input_section, rel, \
2413 r_symndx, symtab_hdr, sym_hashes, \
2414 h, sec, relocation, \
2415 unresolved_reloc, warned, ignored) \
2418 /* It seems this can happen with erroneous or unsupported \
2419 input (mixing a.out and elf in an archive, for example.) */ \
2420 if (sym_hashes == NULL) \
2423 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; \
2425 if (info->wrap_hash != NULL \
2426 && (input_section->flags & SEC_DEBUGGING) != 0) \
2427 h = ((struct elf_link_hash_entry *) \
2428 unwrap_hash_lookup (info, input_bfd, &h->root)); \
2430 while (h->root.type == bfd_link_hash_indirect \
2431 || h->root.type == bfd_link_hash_warning) \
2432 h = (struct elf_link_hash_entry *) h->root.u.i.link; \
2436 unresolved_reloc = FALSE; \
2438 if (h->root.type == bfd_link_hash_defined \
2439 || h->root.type == bfd_link_hash_defweak) \
2441 sec = h->root.u.def.section; \
2443 || sec->output_section == NULL) \
2444 /* Set a flag that will be cleared later if we find a \
2445 relocation value for this symbol. output_section \
2446 is typically NULL for symbols satisfied by a shared \
2448 unresolved_reloc = TRUE; \
2450 relocation = (h->root.u.def.value \
2451 + sec->output_section->vma \
2452 + sec->output_offset); \
2454 else if (h->root.type == bfd_link_hash_undefweak) \
2456 else if (info->unresolved_syms_in_objects == RM_IGNORE \
2457 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) \
2459 else if (!info->relocatable) \
2462 err = (info->unresolved_syms_in_objects == RM_GENERATE_ERROR \
2463 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT); \
2464 if (!info->callbacks->undefined_symbol (info, \
2465 h->root.root.string, \
2468 rel->r_offset, err)) \
2472 (void) unresolved_reloc; \
2478 /* This macro is to avoid lots of duplicated code in the body of the
2479 loop over relocations in xxx_relocate_section() in the various
2482 Handle relocations against symbols from removed linkonce sections,
2483 or sections discarded by a linker script. When doing a relocatable
2484 link, we remove such relocations. Otherwise, we just want the
2485 section contents zeroed and avoid any special processing. */
2486 #define RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
2487 rel, count, relend, \
2488 howto, index, contents) \
2491 _bfd_clear_contents (howto, input_bfd, input_section, \
2492 contents + rel[index].r_offset); \
2494 if (info->relocatable \
2495 && (input_section->flags & SEC_DEBUGGING)) \
2497 /* Only remove relocations in debug sections since other \
2498 sections may require relocations. */ \
2499 Elf_Internal_Shdr *rel_hdr; \
2501 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
2503 /* Avoid empty output section. */ \
2504 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
2506 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
2507 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
2508 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
2510 memmove (rel, rel + count, \
2511 (relend - rel - count) * sizeof (*rel)); \
2513 input_section->reloc_count--; \
2520 for (i_ = 0; i_ < count; i_++) \
2522 rel[i_].r_info = 0; \
2523 rel[i_].r_addend = 0; \
2529 /* Will a symbol be bound to the definition within the shared
2530 library, if any. A unique symbol can never be bound locally. */
2531 #define SYMBOLIC_BIND(INFO, H) \
2532 (!(H)->unique_global \
2533 && ((INFO)->symbolic || ((INFO)->dynamic && !(H)->dynamic)))
2535 #endif /* _LIBELF_H_ */