1 /* BFD back-end data structures for ELF files.
2 Copyright (C) 1992-2015 Free Software Foundation, Inc.
3 Written by Cygnus Support.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
25 #include "elf/common.h"
26 #include "elf/external.h"
27 #include "elf/internal.h"
34 /* The number of entries in a section is its size divided by the size
35 of a single entry. This is normally only applicable to reloc and
36 symbol table sections.
37 PR 9934: It is possible to have relocations that do not refer to
38 symbols, thus it is also possible to have a relocation section in
39 an object file, but no symbol table. */
40 #define NUM_SHDR_ENTRIES(shdr) ((shdr)->sh_entsize > 0 ? (shdr)->sh_size / (shdr)->sh_entsize : 0)
42 /* If size isn't specified as 64 or 32, NAME macro should fail. */
45 #define NAME(x, y) x ## 64 ## _ ## y
48 #define NAME(x, y) x ## 32 ## _ ## y
53 #define NAME(x, y) x ## NOSIZE ## _ ## y
56 #define ElfNAME(X) NAME(Elf,X)
57 #define elfNAME(X) NAME(elf,X)
59 /* Information held for an ELF symbol. The first field is the
60 corresponding asymbol. Every symbol is an ELF file is actually a
61 pointer to this structure, although it is often handled as a
62 pointer to an asymbol. */
68 /* ELF symbol information. */
69 Elf_Internal_Sym internal_elf_sym
;
70 /* Backend specific information. */
73 unsigned int hppa_arg_reloc
;
79 /* Version information. This is from an Elf_Internal_Versym
80 structure in a SHT_GNU_versym section. It is zero if there is no
81 version information. */
82 unsigned short version
;
86 struct elf_strtab_hash
;
92 bfd_signed_vma refcount
;
94 struct got_entry
*glist
;
95 struct plt_entry
*plist
;
98 struct elf_link_virtual_table_entry
100 /* Virtual table entry use information. This array is nominally of size
101 size/sizeof(target_void_pointer), though we have to be able to assume
102 and track a size while the symbol is still undefined. It is indexed
103 via offset/sizeof(target_void_pointer). */
107 /* Virtual table derivation info. */
108 struct elf_link_hash_entry
*parent
;
111 /* ELF linker hash table entries. */
113 struct elf_link_hash_entry
115 struct bfd_link_hash_entry root
;
117 /* Symbol index in output file. This is initialized to -1. It is
118 set to -2 if the symbol is used by a reloc. */
121 /* Symbol index as a dynamic symbol. Initialized to -1, and remains
122 -1 if this is not a dynamic symbol. */
123 /* ??? Note that this is consistently used as a synonym for tests
124 against whether we can perform various simplifying transformations
125 to the code. (E.g. changing a pc-relative jump to a PLT entry
126 into a pc-relative jump to the target function.) That test, which
127 is often relatively complex, and someplaces wrong or incomplete,
128 should really be replaced by a predicate in elflink.c.
130 End result: this field -1 does not indicate that the symbol is
131 not in the dynamic symbol table, but rather that the symbol is
132 not visible outside this DSO. */
135 /* If this symbol requires an entry in the global offset table, the
136 processor specific backend uses this field to track usage and
137 final offset. Two schemes are supported: The first assumes that
138 a symbol may only have one GOT entry, and uses REFCOUNT until
139 size_dynamic_sections, at which point the contents of the .got is
140 fixed. Afterward, if OFFSET is -1, then the symbol does not
141 require a global offset table entry. The second scheme allows
142 multiple GOT entries per symbol, managed via a linked list
143 pointed to by GLIST. */
144 union gotplt_union got
;
146 /* Same, but tracks a procedure linkage table entry. */
147 union gotplt_union plt
;
152 /* Symbol type (STT_NOTYPE, STT_OBJECT, etc.). */
153 unsigned int type
: 8;
155 /* Symbol st_other value, symbol visibility. */
156 unsigned int other
: 8;
158 /* The symbol's st_target_internal value (see Elf_Internal_Sym). */
159 unsigned int target_internal
: 8;
161 /* Symbol is referenced by a non-shared object (other than the object
162 in which it is defined). */
163 unsigned int ref_regular
: 1;
164 /* Symbol is defined by a non-shared object. */
165 unsigned int def_regular
: 1;
166 /* Symbol is referenced by a shared object. */
167 unsigned int ref_dynamic
: 1;
168 /* Symbol is defined by a shared object. */
169 unsigned int def_dynamic
: 1;
170 /* Symbol has a non-weak reference from a non-shared object (other than
171 the object in which it is defined). */
172 unsigned int ref_regular_nonweak
: 1;
173 /* Dynamic symbol has been adjustd. */
174 unsigned int dynamic_adjusted
: 1;
175 /* Symbol needs a copy reloc. */
176 unsigned int needs_copy
: 1;
177 /* Symbol needs a procedure linkage table entry. */
178 unsigned int needs_plt
: 1;
179 /* Symbol appears in a non-ELF input file. */
180 unsigned int non_elf
: 1;
181 /* Symbol should be marked as hidden in the version information. */
182 unsigned int hidden
: 1;
183 /* Symbol was forced to local scope due to a version script file. */
184 unsigned int forced_local
: 1;
185 /* Symbol was forced to be dynamic due to a version script file. */
186 unsigned int dynamic
: 1;
187 /* Symbol was marked during garbage collection. */
188 unsigned int mark
: 1;
189 /* Symbol is referenced by a non-GOT/non-PLT relocation. This is
190 not currently set by all the backends. */
191 unsigned int non_got_ref
: 1;
192 /* Symbol has a definition in a shared object.
193 FIXME: There is no real need for this field if def_dynamic is never
194 cleared and all places that test def_dynamic also test def_regular. */
195 unsigned int dynamic_def
: 1;
196 /* Symbol has a non-weak reference from a shared object. */
197 unsigned int ref_dynamic_nonweak
: 1;
198 /* Symbol is referenced with a relocation where C/C++ pointer equality
200 unsigned int pointer_equality_needed
: 1;
201 /* Symbol is a unique global symbol. */
202 unsigned int unique_global
: 1;
203 /* Symbol is defined by a shared library with non-default visibility
204 in a read/write section. */
205 unsigned int protected_def
: 1;
207 /* String table index in .dynstr if this is a dynamic symbol. */
208 unsigned long dynstr_index
;
212 /* If this is a weak defined symbol from a dynamic object, this
213 field points to a defined symbol with the same value, if there is
214 one. Otherwise it is NULL. */
215 struct elf_link_hash_entry
*weakdef
;
217 /* Hash value of the name computed using the ELF hash function.
218 Used part way through size_dynamic_sections, after we've finished
220 unsigned long elf_hash_value
;
223 /* Version information. */
226 /* This field is used for a symbol which is not defined in a
227 regular object. It points to the version information read in
228 from the dynamic object. */
229 Elf_Internal_Verdef
*verdef
;
230 /* This field is used for a symbol which is defined in a regular
231 object. It is set up in size_dynamic_sections. It points to
232 the version information we should write out for this symbol. */
233 struct bfd_elf_version_tree
*vertree
;
236 struct elf_link_virtual_table_entry
*vtable
;
239 /* Will references to this symbol always reference the symbol
241 #define SYMBOL_REFERENCES_LOCAL(INFO, H) \
242 _bfd_elf_symbol_refs_local_p (H, INFO, 0)
244 /* Will _calls_ to this symbol always call the version in this object? */
245 #define SYMBOL_CALLS_LOCAL(INFO, H) \
246 _bfd_elf_symbol_refs_local_p (H, INFO, 1)
248 /* Common symbols that are turned into definitions don't have the
249 DEF_REGULAR flag set, so they might appear to be undefined.
250 Symbols defined in linker scripts also don't have DEF_REGULAR set. */
251 #define ELF_COMMON_DEF_P(H) \
253 && !(H)->def_dynamic \
254 && (H)->root.type == bfd_link_hash_defined)
256 /* Records local symbols to be emitted in the dynamic symbol table. */
258 struct elf_link_local_dynamic_entry
260 struct elf_link_local_dynamic_entry
*next
;
262 /* The input bfd this symbol came from. */
265 /* The index of the local symbol being copied. */
268 /* The index in the outgoing dynamic symbol table. */
271 /* A copy of the input symbol. */
272 Elf_Internal_Sym isym
;
275 struct elf_link_loaded_list
277 struct elf_link_loaded_list
*next
;
281 /* Structures used by the eh_frame optimization code. */
286 /* If REMOVED == 1, this is the CIE that the FDE originally used.
287 The CIE belongs to the same .eh_frame input section as the FDE.
289 If REMOVED == 0, this is the CIE that we have chosen to use for
290 the output FDE. The CIE's REMOVED field is also 0, but the CIE
291 might belong to a different .eh_frame input section from the FDE.
293 May be NULL to signify that the FDE should be discarded. */
294 struct eh_cie_fde
*cie_inf
;
295 struct eh_cie_fde
*next_for_section
;
298 /* CIEs have three states:
300 - REMOVED && !MERGED: Slated for removal because we haven't yet
301 proven that an FDE needs it. FULL_CIE, if nonnull, points to
302 more detailed information about the CIE.
304 - REMOVED && MERGED: We have merged this CIE with MERGED_WITH,
305 which may not belong to the same input section.
307 - !REMOVED: We have decided to keep this CIE. SEC is the
308 .eh_frame input section that contains the CIE. */
310 struct cie
*full_cie
;
311 struct eh_cie_fde
*merged_with
;
315 /* The offset of the personality data from the start of the CIE,
316 or 0 if the CIE doesn't have any. */
317 unsigned int personality_offset
: 8;
319 /* True if we have marked relocations associated with this CIE. */
320 unsigned int gc_mark
: 1;
322 /* True if we have decided to turn an absolute LSDA encoding into
323 a PC-relative one. */
324 unsigned int make_lsda_relative
: 1;
326 /* True if we have decided to turn an absolute personality
327 encoding into a PC-relative one. */
328 unsigned int make_per_encoding_relative
: 1;
330 /* True if the CIE contains personality data and if that
331 data uses a PC-relative encoding. Always true when
332 make_per_encoding_relative is. */
333 unsigned int per_encoding_relative
: 1;
335 /* True if we need to add an 'R' (FDE encoding) entry to the
336 CIE's augmentation data. */
337 unsigned int add_fde_encoding
: 1;
339 /* True if we have merged this CIE with another. */
340 unsigned int merged
: 1;
343 unsigned int pad1
: 18;
346 unsigned int reloc_index
;
349 unsigned int new_offset
;
350 unsigned int fde_encoding
: 8;
351 unsigned int lsda_encoding
: 8;
352 unsigned int lsda_offset
: 8;
354 /* True if this entry represents a CIE, false if it represents an FDE. */
355 unsigned int cie
: 1;
357 /* True if this entry is currently marked for removal. */
358 unsigned int removed
: 1;
360 /* True if we need to add a 'z' (augmentation size) entry to the CIE's
361 augmentation data, and an associated byte to each of the CIE's FDEs. */
362 unsigned int add_augmentation_size
: 1;
364 /* True if we have decided to convert absolute FDE relocations into
365 relative ones. This applies to the first relocation in the FDE,
366 which is against the code that the FDE describes. */
367 unsigned int make_relative
: 1;
370 unsigned int pad1
: 4;
372 unsigned int *set_loc
;
375 struct eh_frame_sec_info
379 struct eh_cie_fde entry
[1];
382 struct eh_frame_array_ent
391 struct eh_frame_hdr_info
395 unsigned int fde_count
, array_count
;
396 struct eh_frame_array_ent
*array
;
397 /* TRUE if .eh_frame_hdr should contain the sorted search table.
398 We build it if we successfully read all .eh_frame input sections
399 and recognize them. */
403 /* Enum used to identify target specific extensions to the elf_obj_tdata
404 and elf_link_hash_table structures. Note the enums deliberately start
405 from 1 so that we can detect an uninitialized field. The generic value
406 is last so that additions to this enum do not need to modify more than
410 AARCH64_ELF_DATA
= 1,
447 /* ELF linker hash table. */
449 struct elf_link_hash_table
451 struct bfd_link_hash_table root
;
453 /* An identifier used to distinguish different target
454 specific extensions to this structure. */
455 enum elf_target_id hash_table_id
;
457 /* Whether we have created the special dynamic sections required
458 when linking against or generating a shared object. */
459 bfd_boolean dynamic_sections_created
;
461 /* True if this target has relocatable executables, so needs dynamic
463 bfd_boolean is_relocatable_executable
;
465 /* The BFD used to hold special sections created by the linker.
466 This will be the first BFD found which requires these sections to
470 /* The value to use when initialising got.refcount/offset and
471 plt.refcount/offset in an elf_link_hash_entry. Set to zero when
472 the values are refcounts. Set to init_got_offset/init_plt_offset
473 in size_dynamic_sections when the values may be offsets. */
474 union gotplt_union init_got_refcount
;
475 union gotplt_union init_plt_refcount
;
477 /* The value to use for got.refcount/offset and plt.refcount/offset
478 when the values may be offsets. Normally (bfd_vma) -1. */
479 union gotplt_union init_got_offset
;
480 union gotplt_union init_plt_offset
;
482 /* The number of symbols found in the link which must be put into
483 the .dynsym section. */
484 bfd_size_type dynsymcount
;
486 /* The string table of dynamic symbols, which becomes the .dynstr
488 struct elf_strtab_hash
*dynstr
;
490 /* The number of buckets in the hash table in the .hash section.
491 This is based on the number of dynamic symbols. */
492 bfd_size_type bucketcount
;
494 /* A linked list of DT_NEEDED names found in dynamic objects
495 included in the link. */
496 struct bfd_link_needed_list
*needed
;
498 /* Sections in the output bfd that provides a section symbol
499 to be used by relocations emitted against local symbols.
500 Most targets will not use data_index_section. */
501 asection
*text_index_section
;
502 asection
*data_index_section
;
504 /* The _GLOBAL_OFFSET_TABLE_ symbol. */
505 struct elf_link_hash_entry
*hgot
;
507 /* The _PROCEDURE_LINKAGE_TABLE_ symbol. */
508 struct elf_link_hash_entry
*hplt
;
510 /* The _DYNAMIC symbol. */
511 struct elf_link_hash_entry
*hdynamic
;
513 /* A pointer to information used to merge SEC_MERGE sections. */
516 /* Used to link stabs in sections. */
517 struct stab_info stab_info
;
519 /* Used by eh_frame code when editing .eh_frame. */
520 struct eh_frame_hdr_info eh_info
;
522 /* A linked list of local symbols to be added to .dynsym. */
523 struct elf_link_local_dynamic_entry
*dynlocal
;
525 /* A linked list of DT_RPATH/DT_RUNPATH names found in dynamic
526 objects included in the link. */
527 struct bfd_link_needed_list
*runpath
;
529 /* Cached first output tls section and size of PT_TLS segment. */
531 bfd_size_type tls_size
;
533 /* A linked list of BFD's loaded in the link. */
534 struct elf_link_loaded_list
*loaded
;
536 /* Short-cuts to get to dynamic linker sections. */
548 /* Look up an entry in an ELF linker hash table. */
550 #define elf_link_hash_lookup(table, string, create, copy, follow) \
551 ((struct elf_link_hash_entry *) \
552 bfd_link_hash_lookup (&(table)->root, (string), (create), \
555 /* Traverse an ELF linker hash table. */
557 #define elf_link_hash_traverse(table, func, info) \
558 (bfd_link_hash_traverse \
560 (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func), \
563 /* Get the ELF linker hash table from a link_info structure. */
565 #define elf_hash_table(p) ((struct elf_link_hash_table *) ((p)->hash))
567 #define elf_hash_table_id(table) ((table) -> hash_table_id)
569 /* Returns TRUE if the hash table is a struct elf_link_hash_table. */
570 #define is_elf_hash_table(htab) \
571 (((struct bfd_link_hash_table *) (htab))->type == bfd_link_elf_hash_table)
573 /* Used by bfd_sym_from_r_symndx to cache a small number of local
575 #define LOCAL_SYM_CACHE_SIZE 32
579 unsigned long indx
[LOCAL_SYM_CACHE_SIZE
];
580 Elf_Internal_Sym sym
[LOCAL_SYM_CACHE_SIZE
];
583 /* Constant information held for an ELF backend. */
585 struct elf_size_info
{
586 unsigned char sizeof_ehdr
, sizeof_phdr
, sizeof_shdr
;
587 unsigned char sizeof_rel
, sizeof_rela
, sizeof_sym
, sizeof_dyn
, sizeof_note
;
589 /* The size of entries in the .hash section. */
590 unsigned char sizeof_hash_entry
;
592 /* The number of internal relocations to allocate per external
594 unsigned char int_rels_per_ext_rel
;
595 /* We use some fixed size arrays. This should be large enough to
596 handle all back-ends. */
597 #define MAX_INT_RELS_PER_EXT_REL 3
599 unsigned char arch_size
, log_file_align
;
600 unsigned char elfclass
, ev_current
;
601 int (*write_out_phdrs
)
602 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
604 (*write_shdrs_and_ehdr
) (bfd
*);
605 bfd_boolean (*checksum_contents
)
606 (bfd
* , void (*) (const void *, size_t, void *), void *);
608 (bfd
*, asection
*, void *);
609 bfd_boolean (*swap_symbol_in
)
610 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
611 void (*swap_symbol_out
)
612 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
613 bfd_boolean (*slurp_reloc_table
)
614 (bfd
*, asection
*, asymbol
**, bfd_boolean
);
615 long (*slurp_symbol_table
)
616 (bfd
*, asymbol
**, bfd_boolean
);
618 (bfd
*, const void *, Elf_Internal_Dyn
*);
620 (bfd
*, const Elf_Internal_Dyn
*, void *);
622 /* This function is called to swap in a REL relocation. If an
623 external relocation corresponds to more than one internal
624 relocation, then all relocations are swapped in at once. */
625 void (*swap_reloc_in
)
626 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
628 /* This function is called to swap out a REL relocation. */
629 void (*swap_reloc_out
)
630 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
632 /* This function is called to swap in a RELA relocation. If an
633 external relocation corresponds to more than one internal
634 relocation, then all relocations are swapped in at once. */
635 void (*swap_reloca_in
)
636 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
638 /* This function is called to swap out a RELA relocation. */
639 void (*swap_reloca_out
)
640 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
643 #define elf_symbol_from(ABFD,S) \
644 (((S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \
645 && (S)->the_bfd->tdata.elf_obj_data != 0) \
646 ? (elf_symbol_type *) (S) \
649 enum elf_reloc_type_class
{
651 reloc_class_relative
,
657 struct elf_reloc_cookie
659 Elf_Internal_Rela
*rels
, *rel
, *relend
;
660 Elf_Internal_Sym
*locsyms
;
664 struct elf_link_hash_entry
**sym_hashes
;
666 bfd_boolean bad_symtab
;
669 /* The level of IRIX compatibility we're striving for. */
677 /* Mapping of ELF section names and types. */
678 struct bfd_elf_special_section
682 /* 0 means name must match PREFIX exactly.
683 -1 means name must start with PREFIX followed by an arbitrary string.
684 -2 means name must match PREFIX exactly or consist of PREFIX followed
685 by a dot then anything.
686 > 0 means name must start with the first PREFIX_LENGTH chars of
687 PREFIX and finish with the last SUFFIX_LENGTH chars of PREFIX. */
693 enum action_discarded
699 typedef asection
* (*elf_gc_mark_hook_fn
)
700 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
701 struct elf_link_hash_entry
*, Elf_Internal_Sym
*);
703 struct elf_backend_data
705 /* The architecture for this backend. */
706 enum bfd_architecture arch
;
708 /* An identifier used to distinguish different target specific
709 extensions to elf_obj_tdata and elf_link_hash_table structures. */
710 enum elf_target_id target_id
;
712 /* The ELF machine code (EM_xxxx) for this backend. */
713 int elf_machine_code
;
718 /* The maximum page size for this backend. */
721 /* The minimum page size for this backend. An input object will not be
722 considered page aligned unless its sections are correctly aligned for
723 pages at least this large. May be smaller than maxpagesize. */
726 /* The common page size for this backend. */
727 bfd_vma commonpagesize
;
729 /* The BFD flags applied to sections created for dynamic linking. */
730 flagword dynamic_sec_flags
;
732 /* Architecture-specific data for this backend.
733 This is actually a pointer to some type like struct elf_ARCH_data. */
734 const void *arch_data
;
736 /* A function to translate an ELF RELA relocation to a BFD arelent
738 void (*elf_info_to_howto
)
739 (bfd
*, arelent
*, Elf_Internal_Rela
*);
741 /* A function to translate an ELF REL relocation to a BFD arelent
743 void (*elf_info_to_howto_rel
)
744 (bfd
*, arelent
*, Elf_Internal_Rela
*);
746 /* A function to determine whether a symbol is global when
747 partitioning the symbol table into local and global symbols.
748 This should be NULL for most targets, in which case the correct
749 thing will be done. MIPS ELF, at least on the Irix 5, has
750 special requirements. */
751 bfd_boolean (*elf_backend_sym_is_global
)
754 /* The remaining functions are hooks which are called only if they
757 /* A function to permit a backend specific check on whether a
758 particular BFD format is relevant for an object file, and to
759 permit the backend to set any global information it wishes. When
760 this is called elf_elfheader is set, but anything else should be
761 used with caution. If this returns FALSE, the check_format
762 routine will return a bfd_error_wrong_format error. */
763 bfd_boolean (*elf_backend_object_p
)
766 /* A function to do additional symbol processing when reading the
767 ELF symbol table. This is where any processor-specific special
768 section indices are handled. */
769 void (*elf_backend_symbol_processing
)
772 /* A function to do additional symbol processing after reading the
773 entire ELF symbol table. */
774 bfd_boolean (*elf_backend_symbol_table_processing
)
775 (bfd
*, elf_symbol_type
*, unsigned int);
777 /* A function to set the type of the info field. Processor-specific
778 types should be handled here. */
779 int (*elf_backend_get_symbol_type
)
780 (Elf_Internal_Sym
*, int);
782 /* A function to return the linker hash table entry of a symbol that
783 might be satisfied by an archive symbol. */
784 struct elf_link_hash_entry
* (*elf_backend_archive_symbol_lookup
)
785 (bfd
*, struct bfd_link_info
*, const char *);
787 /* Return true if local section symbols should have a non-null st_name.
788 NULL implies false. */
789 bfd_boolean (*elf_backend_name_local_section_symbols
)
792 /* A function to do additional processing on the ELF section header
793 just before writing it out. This is used to set the flags and
794 type fields for some sections, or to actually write out data for
796 bfd_boolean (*elf_backend_section_processing
)
797 (bfd
*, Elf_Internal_Shdr
*);
799 /* A function to handle unusual section types when creating BFD
800 sections from ELF sections. */
801 bfd_boolean (*elf_backend_section_from_shdr
)
802 (bfd
*, Elf_Internal_Shdr
*, const char *, int);
804 /* A function to convert machine dependent ELF section header flags to
805 BFD internal section header flags. */
806 bfd_boolean (*elf_backend_section_flags
)
807 (flagword
*, const Elf_Internal_Shdr
*);
809 /* A function that returns a struct containing ELF section flags and
810 type for the given BFD section. */
811 const struct bfd_elf_special_section
* (*get_sec_type_attr
)
814 /* A function to handle unusual program segment types when creating BFD
815 sections from ELF program segments. */
816 bfd_boolean (*elf_backend_section_from_phdr
)
817 (bfd
*, Elf_Internal_Phdr
*, int, const char *);
819 /* A function to set up the ELF section header for a BFD section in
820 preparation for writing it out. This is where the flags and type
821 fields are set for unusual sections. */
822 bfd_boolean (*elf_backend_fake_sections
)
823 (bfd
*, Elf_Internal_Shdr
*, asection
*);
825 /* A function to get the ELF section index for a BFD section. If
826 this returns TRUE, the section was found. If it is a normal ELF
827 section, *RETVAL should be left unchanged. If it is not a normal
828 ELF section *RETVAL should be set to the SHN_xxxx index. */
829 bfd_boolean (*elf_backend_section_from_bfd_section
)
830 (bfd
*, asection
*, int *retval
);
832 /* If this field is not NULL, it is called by the add_symbols phase
833 of a link just before adding a symbol to the global linker hash
834 table. It may modify any of the fields as it wishes. If *NAME
835 is set to NULL, the symbol will be skipped rather than being
836 added to the hash table. This function is responsible for
837 handling all processor dependent symbol bindings and section
838 indices, and must set at least *FLAGS and *SEC for each processor
839 dependent case; failure to do so will cause a link error. */
840 bfd_boolean (*elf_add_symbol_hook
)
841 (bfd
*abfd
, struct bfd_link_info
*info
, Elf_Internal_Sym
*,
842 const char **name
, flagword
*flags
, asection
**sec
, bfd_vma
*value
);
844 /* If this field is not NULL, it is called by the elf_link_output_sym
845 phase of a link for each symbol which will appear in the object file.
846 On error, this function returns 0. 1 is returned when the symbol
847 should be output, 2 is returned when the symbol should be discarded. */
848 int (*elf_backend_link_output_symbol_hook
)
849 (struct bfd_link_info
*info
, const char *, Elf_Internal_Sym
*,
850 asection
*, struct elf_link_hash_entry
*);
852 /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend
853 linker the first time it encounters a dynamic object in the link.
854 This function must create any sections required for dynamic
855 linking. The ABFD argument is a dynamic object. The .interp,
856 .dynamic, .dynsym, .dynstr, and .hash functions have already been
857 created, and this function may modify the section flags if
858 desired. This function will normally create the .got and .plt
859 sections, but different backends have different requirements. */
860 bfd_boolean (*elf_backend_create_dynamic_sections
)
861 (bfd
*abfd
, struct bfd_link_info
*info
);
863 /* When creating a shared library, determine whether to omit the
864 dynamic symbol for the section. */
865 bfd_boolean (*elf_backend_omit_section_dynsym
)
866 (bfd
*output_bfd
, struct bfd_link_info
*info
, asection
*osec
);
868 /* Return TRUE if relocations of targets are compatible to the extent
869 that CHECK_RELOCS will properly process them. PR 4424. */
870 bfd_boolean (*relocs_compatible
) (const bfd_target
*, const bfd_target
*);
872 /* The CHECK_RELOCS function is called by the add_symbols phase of
873 the ELF backend linker. It is called once for each section with
874 relocs of an object file, just after the symbols for the object
875 file have been added to the global linker hash table. The
876 function must look through the relocs and do any special handling
877 required. This generally means allocating space in the global
878 offset table, and perhaps allocating space for a reloc. The
879 relocs are always passed as Rela structures; if the section
880 actually uses Rel structures, the r_addend field will always be
882 bfd_boolean (*check_relocs
)
883 (bfd
*abfd
, struct bfd_link_info
*info
, asection
*o
,
884 const Elf_Internal_Rela
*relocs
);
886 /* The CHECK_DIRECTIVES function is called once per input file by
887 the add_symbols phase of the ELF backend linker. The function
888 must inspect the bfd and create any additional symbols according
889 to any custom directives in the bfd. */
890 bfd_boolean (*check_directives
)
891 (bfd
*abfd
, struct bfd_link_info
*info
);
893 /* The NOTICE_AS_NEEDED function is called as the linker is about to
894 handle an as-needed lib (ACT = notice_as_needed), and after the
895 linker has decided to keep the lib (ACT = notice_needed) or when
896 the lib is not needed (ACT = notice_not_needed). */
897 bfd_boolean (*notice_as_needed
)
898 (bfd
*abfd
, struct bfd_link_info
*info
, enum notice_asneeded_action act
);
900 /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
901 linker for every symbol which is defined by a dynamic object and
902 referenced by a regular object. This is called after all the
903 input files have been seen, but before the SIZE_DYNAMIC_SECTIONS
904 function has been called. The hash table entry should be
905 bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be
906 defined in a section from a dynamic object. Dynamic object
907 sections are not included in the final link, and this function is
908 responsible for changing the value to something which the rest of
909 the link can deal with. This will normally involve adding an
910 entry to the .plt or .got or some such section, and setting the
911 symbol to point to that. */
912 bfd_boolean (*elf_backend_adjust_dynamic_symbol
)
913 (struct bfd_link_info
*info
, struct elf_link_hash_entry
*h
);
915 /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker
916 after all the linker input files have been seen but before the
917 section sizes have been set. This is called after
918 ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS. */
919 bfd_boolean (*elf_backend_always_size_sections
)
920 (bfd
*output_bfd
, struct bfd_link_info
*info
);
922 /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend
923 linker after all the linker input files have been seen but before
924 the sections sizes have been set. This is called after
925 ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols.
926 It is only called when linking against a dynamic object. It must
927 set the sizes of the dynamic sections, and may fill in their
928 contents as well. The generic ELF linker can handle the .dynsym,
929 .dynstr and .hash sections. This function must handle the
930 .interp section and any sections created by the
931 CREATE_DYNAMIC_SECTIONS entry point. */
932 bfd_boolean (*elf_backend_size_dynamic_sections
)
933 (bfd
*output_bfd
, struct bfd_link_info
*info
);
935 /* Set TEXT_INDEX_SECTION and DATA_INDEX_SECTION, the output sections
936 we keep to use as a base for relocs and symbols. */
937 void (*elf_backend_init_index_section
)
938 (bfd
*output_bfd
, struct bfd_link_info
*info
);
940 /* The RELOCATE_SECTION function is called by the ELF backend linker
941 to handle the relocations for a section.
943 The relocs are always passed as Rela structures; if the section
944 actually uses Rel structures, the r_addend field will always be
947 This function is responsible for adjust the section contents as
948 necessary, and (if using Rela relocs and generating a
949 relocatable output file) adjusting the reloc addend as
952 This function does not have to worry about setting the reloc
953 address or the reloc symbol index.
955 LOCAL_SYMS is a pointer to the swapped in local symbols.
957 LOCAL_SECTIONS is an array giving the section in the input file
958 corresponding to the st_shndx field of each local symbol.
960 The global hash table entry for the global symbols can be found
961 via elf_sym_hashes (input_bfd).
963 When generating relocatable output, this function must handle
964 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
965 going to be the section symbol corresponding to the output
966 section, which means that the addend must be adjusted
969 Returns FALSE on error, TRUE on success, 2 if successful and
970 relocations should be written for this section. */
971 int (*elf_backend_relocate_section
)
972 (bfd
*output_bfd
, struct bfd_link_info
*info
, bfd
*input_bfd
,
973 asection
*input_section
, bfd_byte
*contents
, Elf_Internal_Rela
*relocs
,
974 Elf_Internal_Sym
*local_syms
, asection
**local_sections
);
976 /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend
977 linker just before it writes a symbol out to the .dynsym section.
978 The processor backend may make any required adjustment to the
979 symbol. It may also take the opportunity to set contents of the
980 dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on
981 all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called
982 on those symbols which are defined by a dynamic object. */
983 bfd_boolean (*elf_backend_finish_dynamic_symbol
)
984 (bfd
*output_bfd
, struct bfd_link_info
*info
,
985 struct elf_link_hash_entry
*h
, Elf_Internal_Sym
*sym
);
987 /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend
988 linker just before it writes all the dynamic sections out to the
989 output file. The FINISH_DYNAMIC_SYMBOL will have been called on
990 all dynamic symbols. */
991 bfd_boolean (*elf_backend_finish_dynamic_sections
)
992 (bfd
*output_bfd
, struct bfd_link_info
*info
);
994 /* A function to do any beginning processing needed for the ELF file
995 before building the ELF headers and computing file positions. */
996 void (*elf_backend_begin_write_processing
)
997 (bfd
*, struct bfd_link_info
*);
999 /* A function to do any final processing needed for the ELF file
1000 before writing it out. The LINKER argument is TRUE if this BFD
1001 was created by the ELF backend linker. */
1002 void (*elf_backend_final_write_processing
)
1003 (bfd
*, bfd_boolean linker
);
1005 /* This function is called by get_program_header_size. It should
1006 return the number of additional program segments which this BFD
1007 will need. It should return -1 on error. */
1008 int (*elf_backend_additional_program_headers
)
1009 (bfd
*, struct bfd_link_info
*);
1011 /* This function is called to modify an existing segment map in a
1012 backend specific fashion. */
1013 bfd_boolean (*elf_backend_modify_segment_map
)
1014 (bfd
*, struct bfd_link_info
*);
1016 /* This function is called to modify program headers just before
1017 they are written. */
1018 bfd_boolean (*elf_backend_modify_program_headers
)
1019 (bfd
*, struct bfd_link_info
*);
1021 /* This function is called before section garbage collection to
1022 mark entry symbol sections. */
1024 (struct bfd_link_info
*);
1026 /* This function is called during section garbage collection to
1027 mark sections that define global symbols. */
1028 bfd_boolean (*gc_mark_dynamic_ref
)
1029 (struct elf_link_hash_entry
*, void *);
1031 /* This function is called during section gc to discover the section a
1032 particular relocation refers to. */
1033 elf_gc_mark_hook_fn gc_mark_hook
;
1035 /* This function, if defined, is called after the first gc marking pass
1036 to allow the backend to mark additional sections. */
1037 bfd_boolean (*gc_mark_extra_sections
)
1038 (struct bfd_link_info
*, elf_gc_mark_hook_fn
);
1040 /* This function, if defined, is called during the sweep phase of gc
1041 in order that a backend might update any data structures it might
1043 bfd_boolean (*gc_sweep_hook
)
1044 (bfd
*, struct bfd_link_info
*, asection
*, const Elf_Internal_Rela
*);
1046 /* This function, if defined, is called after the ELF headers have
1047 been created. This allows for things like the OS and ABI versions
1049 void (*elf_backend_post_process_headers
)
1050 (bfd
*, struct bfd_link_info
*);
1052 /* This function, if defined, prints a symbol to file and returns the
1053 name of the symbol to be printed. It should return NULL to fall
1054 back to default symbol printing. */
1055 const char *(*elf_backend_print_symbol_all
)
1056 (bfd
*, void *, asymbol
*);
1058 /* This function, if defined, is called after all local symbols and
1059 global symbols converted to locals are emitted into the symtab
1060 section. It allows the backend to emit special local symbols
1061 not handled in the hash table. */
1062 bfd_boolean (*elf_backend_output_arch_local_syms
)
1063 (bfd
*, struct bfd_link_info
*, void *,
1064 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym
*, asection
*,
1065 struct elf_link_hash_entry
*));
1067 /* This function, if defined, is called after all symbols are emitted
1068 into the symtab section. It allows the backend to emit special
1069 global symbols not handled in the hash table. */
1070 bfd_boolean (*elf_backend_output_arch_syms
)
1071 (bfd
*, struct bfd_link_info
*, void *,
1072 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym
*, asection
*,
1073 struct elf_link_hash_entry
*));
1075 /* Copy any information related to dynamic linking from a pre-existing
1076 symbol to a newly created symbol. Also called to copy flags and
1077 other back-end info to a weakdef, in which case the symbol is not
1078 newly created and plt/got refcounts and dynamic indices should not
1080 void (*elf_backend_copy_indirect_symbol
)
1081 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
1082 struct elf_link_hash_entry
*);
1084 /* Modify any information related to dynamic linking such that the
1085 symbol is not exported. */
1086 void (*elf_backend_hide_symbol
)
1087 (struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd_boolean
);
1089 /* A function to do additional symbol fixup, called by
1090 _bfd_elf_fix_symbol_flags. */
1091 bfd_boolean (*elf_backend_fixup_symbol
)
1092 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
1094 /* Merge the backend specific symbol attribute. */
1095 void (*elf_backend_merge_symbol_attribute
)
1096 (struct elf_link_hash_entry
*, const Elf_Internal_Sym
*, bfd_boolean
,
1099 /* This function, if defined, will return a string containing the
1100 name of a target-specific dynamic tag. */
1101 char *(*elf_backend_get_target_dtag
)
1104 /* Decide whether an undefined symbol is special and can be ignored.
1105 This is the case for OPTIONAL symbols on IRIX. */
1106 bfd_boolean (*elf_backend_ignore_undef_symbol
)
1107 (struct elf_link_hash_entry
*);
1109 /* Emit relocations. Overrides default routine for emitting relocs,
1110 except during a relocatable link, or if all relocs are being emitted. */
1111 bfd_boolean (*elf_backend_emit_relocs
)
1112 (bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*,
1113 struct elf_link_hash_entry
**);
1115 /* Count relocations. Not called for relocatable links
1116 or if all relocs are being preserved in the output. */
1117 unsigned int (*elf_backend_count_relocs
)
1118 (struct bfd_link_info
*, asection
*);
1120 /* Say whether to sort relocs output by ld -r and ld --emit-relocs,
1121 by r_offset. If NULL, default to true. */
1122 bfd_boolean (*sort_relocs_p
)
1125 /* This function, if defined, is called when an NT_PRSTATUS note is found
1127 bfd_boolean (*elf_backend_grok_prstatus
)
1128 (bfd
*, Elf_Internal_Note
*);
1130 /* This function, if defined, is called when an NT_PSINFO or NT_PRPSINFO
1131 note is found in a core file. */
1132 bfd_boolean (*elf_backend_grok_psinfo
)
1133 (bfd
*, Elf_Internal_Note
*);
1135 /* This function, if defined, is called to write a note to a corefile. */
1136 char *(*elf_backend_write_core_note
)
1137 (bfd
*abfd
, char *buf
, int *bufsiz
, int note_type
, ...);
1139 /* This function, if defined, is called to convert target-specific
1140 section flag names into hex values. */
1141 flagword (*elf_backend_lookup_section_flags_hook
)
1144 /* This function returns class of a reloc type. */
1145 enum elf_reloc_type_class (*elf_backend_reloc_type_class
)
1146 (const struct bfd_link_info
*, const asection
*, const Elf_Internal_Rela
*);
1148 /* This function, if defined, removes information about discarded functions
1149 from other sections which mention them. */
1150 bfd_boolean (*elf_backend_discard_info
)
1151 (bfd
*, struct elf_reloc_cookie
*, struct bfd_link_info
*);
1153 /* This function, if defined, signals that the function above has removed
1154 the discarded relocations for this section. */
1155 bfd_boolean (*elf_backend_ignore_discarded_relocs
)
1158 /* What to do when ld finds relocations against symbols defined in
1159 discarded sections. */
1160 unsigned int (*action_discarded
)
1163 /* This function returns the width of FDE pointers in bytes, or 0 if
1164 that can't be determined for some reason. The default definition
1165 goes by the bfd's EI_CLASS. */
1166 unsigned int (*elf_backend_eh_frame_address_size
)
1167 (bfd
*, asection
*);
1169 /* These functions tell elf-eh-frame whether to attempt to turn
1170 absolute or lsda encodings into pc-relative ones. The default
1171 definition enables these transformations. */
1172 bfd_boolean (*elf_backend_can_make_relative_eh_frame
)
1173 (bfd
*, struct bfd_link_info
*, asection
*);
1174 bfd_boolean (*elf_backend_can_make_lsda_relative_eh_frame
)
1175 (bfd
*, struct bfd_link_info
*, asection
*);
1177 /* This function returns an encoding after computing the encoded
1178 value (and storing it in ENCODED) for the given OFFSET into OSEC,
1179 to be stored in at LOC_OFFSET into the LOC_SEC input section.
1180 The default definition chooses a 32-bit PC-relative encoding. */
1181 bfd_byte (*elf_backend_encode_eh_address
)
1182 (bfd
*abfd
, struct bfd_link_info
*info
,
1183 asection
*osec
, bfd_vma offset
,
1184 asection
*loc_sec
, bfd_vma loc_offset
,
1187 /* This function, if defined, may write out the given section.
1188 Returns TRUE if it did so and FALSE if the caller should. */
1189 bfd_boolean (*elf_backend_write_section
)
1190 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
1192 /* The level of IRIX compatibility we're striving for.
1193 MIPS ELF specific function. */
1194 irix_compat_t (*elf_backend_mips_irix_compat
)
1197 reloc_howto_type
*(*elf_backend_mips_rtype_to_howto
)
1198 (unsigned int, bfd_boolean
);
1200 /* The swapping table to use when dealing with ECOFF information.
1201 Used for the MIPS ELF .mdebug section. */
1202 const struct ecoff_debug_swap
*elf_backend_ecoff_debug_swap
;
1204 /* This function implements `bfd_elf_bfd_from_remote_memory';
1205 see elf.c, elfcode.h. */
1206 bfd
*(*elf_backend_bfd_from_remote_memory
)
1207 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
1208 int (*target_read_memory
) (bfd_vma vma
, bfd_byte
*myaddr
,
1209 bfd_size_type len
));
1211 /* This function is used by `_bfd_elf_get_synthetic_symtab';
1213 bfd_vma (*plt_sym_val
) (bfd_vma
, const asection
*, const arelent
*);
1215 /* Is symbol defined in common section? */
1216 bfd_boolean (*common_definition
) (Elf_Internal_Sym
*);
1218 /* Return a common section index for section. */
1219 unsigned int (*common_section_index
) (asection
*);
1221 /* Return a common section for section. */
1222 asection
*(*common_section
) (asection
*);
1224 /* Return TRUE if we can merge 2 definitions. */
1225 bfd_boolean (*merge_symbol
) (struct elf_link_hash_entry
*,
1226 const Elf_Internal_Sym
*, asection
**,
1227 bfd_boolean
, bfd_boolean
,
1228 bfd
*, const asection
*);
1230 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
1231 bfd_boolean (*elf_hash_symbol
) (struct elf_link_hash_entry
*);
1233 /* Return TRUE if type is a function symbol type. */
1234 bfd_boolean (*is_function_type
) (unsigned int type
);
1236 /* If the ELF symbol SYM might be a function in SEC, return the
1237 function size and set *CODE_OFF to the function's entry point,
1238 otherwise return zero. */
1239 bfd_size_type (*maybe_function_sym
) (const asymbol
*sym
, asection
*sec
,
1242 /* Return the section which RELOC_SEC applies to. */
1243 asection
*(*get_reloc_section
) (asection
*reloc_sec
);
1245 /* Used to handle bad SHF_LINK_ORDER input. */
1246 bfd_error_handler_type link_order_error_handler
;
1248 /* Name of the PLT relocation section. */
1249 const char *relplt_name
;
1251 /* Alternate EM_xxxx machine codes for this backend. */
1252 int elf_machine_alt1
;
1253 int elf_machine_alt2
;
1255 const struct elf_size_info
*s
;
1257 /* An array of target specific special sections. */
1258 const struct bfd_elf_special_section
*special_sections
;
1260 /* The size in bytes of the header for the GOT. This includes the
1261 so-called reserved entries on some systems. */
1262 bfd_vma got_header_size
;
1264 /* The size of the GOT entry for the symbol pointed to by H if non-NULL,
1265 otherwise by the local symbol with index SYMNDX in IBFD. */
1266 bfd_vma (*got_elt_size
) (bfd
*, struct bfd_link_info
*,
1267 struct elf_link_hash_entry
*h
,
1268 bfd
*ibfd
, unsigned long symndx
);
1270 /* The vendor name to use for a processor-standard attributes section. */
1271 const char *obj_attrs_vendor
;
1273 /* The section name to use for a processor-standard attributes section. */
1274 const char *obj_attrs_section
;
1276 /* Return 1, 2 or 3 to indicate what type of arguments a
1277 processor-specific tag takes. */
1278 int (*obj_attrs_arg_type
) (int);
1280 /* The section type to use for an attributes section. */
1281 unsigned int obj_attrs_section_type
;
1283 /* This function determines the order in which any attributes are
1284 written. It must be defined for input in the range
1285 LEAST_KNOWN_OBJ_ATTRIBUTE..NUM_KNOWN_OBJ_ATTRIBUTES-1 (this range
1286 is used in order to make unity easy). The returned value is the
1287 actual tag number to place in the input position. */
1288 int (*obj_attrs_order
) (int);
1290 /* Handle merging unknown attributes; either warn and return TRUE,
1291 or give an error and return FALSE. */
1292 bfd_boolean (*obj_attrs_handle_unknown
) (bfd
*, int);
1294 /* This is non-zero if static TLS segments require a special alignment. */
1295 unsigned static_tls_alignment
;
1297 /* Alignment for the PT_GNU_STACK segment. */
1298 unsigned stack_align
;
1300 /* This is TRUE if the linker should act like collect and gather
1301 global constructors and destructors by name. This is TRUE for
1302 MIPS ELF because the Irix 5 tools can not handle the .init
1304 unsigned collect
: 1;
1306 /* This is TRUE if the linker should ignore changes to the type of a
1307 symbol. This is TRUE for MIPS ELF because some Irix 5 objects
1308 record undefined functions as STT_OBJECT although the definitions
1310 unsigned type_change_ok
: 1;
1312 /* Whether the backend may use REL relocations. (Some backends use
1313 both REL and RELA relocations, and this flag is set for those
1315 unsigned may_use_rel_p
: 1;
1317 /* Whether the backend may use RELA relocations. (Some backends use
1318 both REL and RELA relocations, and this flag is set for those
1320 unsigned may_use_rela_p
: 1;
1322 /* Whether the default relocation type is RELA. If a backend with
1323 this flag set wants REL relocations for a particular section,
1324 it must note that explicitly. Similarly, if this flag is clear,
1325 and the backend wants RELA relocations for a particular
1327 unsigned default_use_rela_p
: 1;
1329 /* True if PLT and copy relocations should be RELA by default. */
1330 unsigned rela_plts_and_copies_p
: 1;
1332 /* Set if RELA relocations for a relocatable link can be handled by
1333 generic code. Backends that set this flag need do nothing in the
1334 backend relocate_section routine for relocatable linking. */
1335 unsigned rela_normal
: 1;
1337 /* TRUE if addresses "naturally" sign extend. This is used when
1338 swapping in from Elf32 when BFD64. */
1339 unsigned sign_extend_vma
: 1;
1341 unsigned want_got_plt
: 1;
1342 unsigned plt_readonly
: 1;
1343 unsigned want_plt_sym
: 1;
1344 unsigned plt_not_loaded
: 1;
1345 unsigned plt_alignment
: 4;
1346 unsigned can_gc_sections
: 1;
1347 unsigned can_refcount
: 1;
1348 unsigned want_got_sym
: 1;
1349 unsigned want_dynbss
: 1;
1351 /* Targets which do not support physical addressing often require
1352 that the p_paddr field in the section header to be set to zero.
1353 This field indicates whether this behavior is required. */
1354 unsigned want_p_paddr_set_to_zero
: 1;
1356 /* True if an object file lacking a .note.GNU-stack section
1357 should be assumed to be requesting exec stack. At least one
1358 other file in the link needs to have a .note.GNU-stack section
1359 for a PT_GNU_STACK segment to be created. */
1360 unsigned default_execstack
: 1;
1362 /* True if elf_section_data(sec)->this_hdr.contents is sec->rawsize
1363 in length rather than sec->size in length, if sec->rawsize is
1364 non-zero and smaller than sec->size. */
1365 unsigned caches_rawsize
: 1;
1367 /* Address of protected data defined in the shared library may be
1368 external, i.e., due to copy relocation. */
1369 unsigned extern_protected_data
: 1;
1372 /* Information about reloc sections associated with a bfd_elf_section_data
1374 struct bfd_elf_section_reloc_data
1376 /* The ELF header for the reloc section associated with this
1378 Elf_Internal_Shdr
*hdr
;
1379 /* The number of relocations currently assigned to HDR. */
1381 /* The ELF section number of the reloc section. Only used for an
1384 /* Used by the backend linker to store the symbol hash table entries
1385 associated with relocs against global symbols. */
1386 struct elf_link_hash_entry
**hashes
;
1389 /* Information stored for each BFD section in an ELF file. This
1390 structure is allocated by elf_new_section_hook. */
1392 struct bfd_elf_section_data
1394 /* The ELF header for this section. */
1395 Elf_Internal_Shdr this_hdr
;
1397 /* INPUT_SECTION_FLAGS if specified in the linker script. */
1398 struct flag_info
*section_flag_info
;
1400 /* Information about the REL and RELA reloc sections associated
1401 with this section, if any. */
1402 struct bfd_elf_section_reloc_data rel
, rela
;
1404 /* The ELF section number of this section. */
1407 /* Used by the backend linker when generating a shared library to
1408 record the dynamic symbol index for a section symbol
1409 corresponding to this section. A value of 0 means that there is
1410 no dynamic symbol for this section. */
1413 /* A pointer to the linked-to section for SHF_LINK_ORDER. */
1414 asection
*linked_to
;
1416 /* A pointer to the swapped relocs. If the section uses REL relocs,
1417 rather than RELA, all the r_addend fields will be zero. This
1418 pointer may be NULL. It is used by the backend linker. */
1419 Elf_Internal_Rela
*relocs
;
1421 /* A pointer to a linked list tracking dynamic relocs copied for
1425 /* A pointer to the bfd section used for dynamic relocs. */
1429 /* Group name, if this section is a member of a group. */
1432 /* Group signature sym, if this is the SHT_GROUP section. */
1433 struct bfd_symbol
*id
;
1436 /* For a member of a group, points to the SHT_GROUP section.
1437 NULL for the SHT_GROUP section itself and non-group sections. */
1438 asection
*sec_group
;
1440 /* A linked list of member sections in the group. Circular when used by
1441 the linker. For the SHT_GROUP section, points at first member. */
1442 asection
*next_in_group
;
1444 /* The FDEs associated with this section. The u.fde.next_in_section
1445 field acts as a chain pointer. */
1446 struct eh_cie_fde
*fde_list
;
1448 /* A pointer used for various section optimizations. */
1452 #define elf_section_data(sec) ((struct bfd_elf_section_data*)(sec)->used_by_bfd)
1453 #define elf_linked_to_section(sec) (elf_section_data(sec)->linked_to)
1454 #define elf_section_type(sec) (elf_section_data(sec)->this_hdr.sh_type)
1455 #define elf_section_flags(sec) (elf_section_data(sec)->this_hdr.sh_flags)
1456 #define elf_group_name(sec) (elf_section_data(sec)->group.name)
1457 #define elf_group_id(sec) (elf_section_data(sec)->group.id)
1458 #define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group)
1459 #define elf_fde_list(sec) (elf_section_data(sec)->fde_list)
1460 #define elf_sec_group(sec) (elf_section_data(sec)->sec_group)
1462 #define xvec_get_elf_backend_data(xvec) \
1463 ((const struct elf_backend_data *) (xvec)->backend_data)
1465 #define get_elf_backend_data(abfd) \
1466 xvec_get_elf_backend_data ((abfd)->xvec)
1468 /* The least object attributes (within an attributes subsection) known
1469 for any target. Some code assumes that the value 0 is not used and
1470 the field for that attribute can instead be used as a marker to
1471 indicate that attributes have been initialized. */
1472 #define LEAST_KNOWN_OBJ_ATTRIBUTE 2
1474 /* The maximum number of known object attributes for any target. */
1475 #define NUM_KNOWN_OBJ_ATTRIBUTES 71
1477 /* The value of an object attribute. The type indicates whether the attribute
1478 holds and integer, a string, or both. It can also indicate that there can
1479 be no default (i.e. all values must be written to file, even zero). */
1481 typedef struct obj_attribute
1483 #define ATTR_TYPE_FLAG_INT_VAL (1 << 0)
1484 #define ATTR_TYPE_FLAG_STR_VAL (1 << 1)
1485 #define ATTR_TYPE_FLAG_NO_DEFAULT (1 << 2)
1487 #define ATTR_TYPE_HAS_INT_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_INT_VAL)
1488 #define ATTR_TYPE_HAS_STR_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_STR_VAL)
1489 #define ATTR_TYPE_HAS_NO_DEFAULT(TYPE) ((TYPE) & ATTR_TYPE_FLAG_NO_DEFAULT)
1496 typedef struct obj_attribute_list
1498 struct obj_attribute_list
*next
;
1501 } obj_attribute_list
;
1503 /* Object attributes may either be defined by the processor ABI, index
1504 OBJ_ATTR_PROC in the *_obj_attributes arrays, or be GNU-specific
1505 (and possibly also processor-specific), index OBJ_ATTR_GNU. */
1506 #define OBJ_ATTR_PROC 0
1507 #define OBJ_ATTR_GNU 1
1508 #define OBJ_ATTR_FIRST OBJ_ATTR_PROC
1509 #define OBJ_ATTR_LAST OBJ_ATTR_GNU
1511 /* The following object attribute tags are taken as generic, for all
1512 targets and for "gnu" where there is no target standard. */
1519 Tag_compatibility
= 32
1522 /* The following struct stores information about every SystemTap section
1523 found in the object file. */
1526 struct sdt_note
*next
;
1531 /* NT_GNU_BUILD_ID note type info for input BFDs. */
1538 /* tdata information grabbed from an elf core file. */
1539 struct core_elf_obj_tdata
1548 /* Extra tdata information held for output ELF BFDs. */
1549 struct output_elf_obj_tdata
1551 struct elf_segment_map
*seg_map
;
1552 struct elf_strtab_hash
*strtab_ptr
;
1554 /* STT_SECTION symbols for each section */
1555 asymbol
**section_syms
;
1557 /* Used to determine if PT_GNU_EH_FRAME segment header should be
1559 asection
*eh_frame_hdr
;
1561 /* NT_GNU_BUILD_ID note type info. */
1564 bfd_boolean (*after_write_object_contents
) (bfd
*);
1569 /* Records the result of `get_program_header_size'. */
1570 bfd_size_type program_header_size
;
1572 /* Used when laying out sections. */
1573 file_ptr next_file_pos
;
1575 int num_section_syms
;
1576 unsigned int shstrtab_section
, strtab_section
;
1578 /* Segment flags for the PT_GNU_STACK segment. */
1579 unsigned int stack_flags
;
1581 /* This is set to TRUE if the object was created by the backend
1585 /* Used to determine if the e_flags field has been initialized */
1586 bfd_boolean flags_init
;
1589 /* Some private data is stashed away for future use using the tdata pointer
1590 in the bfd structure. */
1592 struct elf_obj_tdata
1594 Elf_Internal_Ehdr elf_header
[1]; /* Actual data, but ref like ptr */
1595 Elf_Internal_Shdr
**elf_sect_ptr
;
1596 Elf_Internal_Phdr
*phdr
;
1597 Elf_Internal_Shdr symtab_hdr
;
1598 Elf_Internal_Shdr shstrtab_hdr
;
1599 Elf_Internal_Shdr strtab_hdr
;
1600 Elf_Internal_Shdr dynsymtab_hdr
;
1601 Elf_Internal_Shdr dynstrtab_hdr
;
1602 Elf_Internal_Shdr dynversym_hdr
;
1603 Elf_Internal_Shdr dynverref_hdr
;
1604 Elf_Internal_Shdr dynverdef_hdr
;
1605 Elf_Internal_Shdr symtab_shndx_hdr
;
1606 bfd_vma gp
; /* The gp value */
1607 unsigned int gp_size
; /* The gp size */
1608 unsigned int num_elf_sections
; /* elf_sect_ptr size */
1610 /* A mapping from external symbols to entries in the linker hash
1611 table, used when linking. This is indexed by the symbol index
1612 minus the sh_info field of the symbol table header. */
1613 struct elf_link_hash_entry
**sym_hashes
;
1615 /* Track usage and final offsets of GOT entries for local symbols.
1616 This array is indexed by symbol index. Elements are used
1617 identically to "got" in struct elf_link_hash_entry. */
1620 bfd_signed_vma
*refcounts
;
1622 struct got_entry
**ents
;
1625 /* The linker ELF emulation code needs to let the backend ELF linker
1626 know what filename should be used for a dynamic object if the
1627 dynamic object is found using a search. The emulation code then
1628 sometimes needs to know what name was actually used. Until the
1629 file has been added to the linker symbol table, this field holds
1630 the name the linker wants. After it has been added, it holds the
1631 name actually used, which will be the DT_SONAME entry if there is
1633 const char *dt_name
;
1635 /* The linker emulation needs to know what audit libs
1636 are used by a dynamic object. */
1637 const char *dt_audit
;
1639 /* Used by find_nearest_line entry point. */
1642 /* A place to stash dwarf1 info for this bfd. */
1643 struct dwarf1_debug
*dwarf1_find_line_info
;
1645 /* A place to stash dwarf2 info for this bfd. */
1646 void *dwarf2_find_line_info
;
1648 /* Stash away info for yet another find line/function variant. */
1649 void *elf_find_function_cache
;
1651 /* Number of symbol version definitions we are about to emit. */
1652 unsigned int cverdefs
;
1654 /* Number of symbol version references we are about to emit. */
1655 unsigned int cverrefs
;
1657 /* Symbol version definitions in external objects. */
1658 Elf_Internal_Verdef
*verdef
;
1660 /* Symbol version references to external objects. */
1661 Elf_Internal_Verneed
*verref
;
1663 /* A pointer to the .eh_frame section. */
1664 asection
*eh_frame_section
;
1666 /* Symbol buffer. */
1669 obj_attribute known_obj_attributes
[2][NUM_KNOWN_OBJ_ATTRIBUTES
];
1670 obj_attribute_list
*other_obj_attributes
[2];
1672 /* NT_GNU_BUILD_ID note type. */
1673 struct elf_build_id
*build_id
;
1675 /* Linked-list containing information about every Systemtap section
1676 found in the object file. Each section corresponds to one entry
1678 struct sdt_note
*sdt_note_head
;
1680 Elf_Internal_Shdr
**group_sect_ptr
;
1683 unsigned int symtab_section
, symtab_shndx_section
, dynsymtab_section
;
1684 unsigned int dynversym_section
, dynverdef_section
, dynverref_section
;
1686 /* An identifier used to distinguish different target
1687 specific extensions to this structure. */
1688 enum elf_target_id object_id
;
1690 /* Whether a dyanmic object was specified normally on the linker
1691 command line, or was specified when --as-needed was in effect,
1692 or was found via a DT_NEEDED entry. */
1693 enum dynamic_lib_link_class dyn_lib_class
;
1695 /* Irix 5 often screws up the symbol table, sorting local symbols
1696 after global symbols. This flag is set if the symbol table in
1697 this BFD appears to be screwed up. If it is, we ignore the
1698 sh_info field in the symbol table header, and always read all the
1700 bfd_boolean bad_symtab
;
1702 /* True if the bfd contains symbols that have the STT_GNU_IFUNC
1703 symbol type or STB_GNU_UNIQUE binding. Used to set the osabi
1704 field in the ELF header structure. */
1705 bfd_boolean has_gnu_symbols
;
1707 /* Information grabbed from an elf core file. */
1708 struct core_elf_obj_tdata
*core
;
1710 /* More information held for output ELF BFDs. */
1711 struct output_elf_obj_tdata
*o
;
1714 #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
1716 #define elf_object_id(bfd) (elf_tdata(bfd) -> object_id)
1717 #define elf_program_header_size(bfd) (elf_tdata(bfd) -> o->program_header_size)
1718 #define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header)
1719 #define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr)
1720 #define elf_numsections(bfd) (elf_tdata(bfd) -> num_elf_sections)
1721 #define elf_seg_map(bfd) (elf_tdata(bfd) -> o->seg_map)
1722 #define elf_next_file_pos(bfd) (elf_tdata(bfd) -> o->next_file_pos)
1723 #define elf_eh_frame_hdr(bfd) (elf_tdata(bfd) -> o->eh_frame_hdr)
1724 #define elf_linker(bfd) (elf_tdata(bfd) -> o->linker)
1725 #define elf_stack_flags(bfd) (elf_tdata(bfd) -> o->stack_flags)
1726 #define elf_shstrtab(bfd) (elf_tdata(bfd) -> o->strtab_ptr)
1727 #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section)
1728 #define elf_symtab_shndx(bfd) (elf_tdata(bfd) -> symtab_shndx_section)
1729 #define elf_strtab_sec(bfd) (elf_tdata(bfd) -> o->strtab_section)
1730 #define elf_shstrtab_sec(bfd) (elf_tdata(bfd) -> o->shstrtab_section)
1731 #define elf_symtab_hdr(bfd) (elf_tdata(bfd) -> symtab_hdr)
1732 #define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section)
1733 #define elf_dynversym(bfd) (elf_tdata(bfd) -> dynversym_section)
1734 #define elf_dynverdef(bfd) (elf_tdata(bfd) -> dynverdef_section)
1735 #define elf_dynverref(bfd) (elf_tdata(bfd) -> dynverref_section)
1736 #define elf_eh_frame_section(bfd) \
1737 (elf_tdata(bfd) -> eh_frame_section)
1738 #define elf_section_syms(bfd) (elf_tdata(bfd) -> o->section_syms)
1739 #define elf_num_section_syms(bfd) (elf_tdata(bfd) -> o->num_section_syms)
1740 #define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
1741 #define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
1742 #define elf_gp(bfd) (elf_tdata(bfd) -> gp)
1743 #define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size)
1744 #define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes)
1745 #define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts)
1746 #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets)
1747 #define elf_local_got_ents(bfd) (elf_tdata(bfd) -> local_got.ents)
1748 #define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name)
1749 #define elf_dt_audit(bfd) (elf_tdata(bfd) -> dt_audit)
1750 #define elf_dyn_lib_class(bfd) (elf_tdata(bfd) -> dyn_lib_class)
1751 #define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab)
1752 #define elf_flags_init(bfd) (elf_tdata(bfd) -> o->flags_init)
1753 #define elf_known_obj_attributes(bfd) (elf_tdata (bfd) -> known_obj_attributes)
1754 #define elf_other_obj_attributes(bfd) (elf_tdata (bfd) -> other_obj_attributes)
1755 #define elf_known_obj_attributes_proc(bfd) \
1756 (elf_known_obj_attributes (bfd) [OBJ_ATTR_PROC])
1757 #define elf_other_obj_attributes_proc(bfd) \
1758 (elf_other_obj_attributes (bfd) [OBJ_ATTR_PROC])
1760 extern void _bfd_elf_swap_verdef_in
1761 (bfd
*, const Elf_External_Verdef
*, Elf_Internal_Verdef
*);
1762 extern void _bfd_elf_swap_verdef_out
1763 (bfd
*, const Elf_Internal_Verdef
*, Elf_External_Verdef
*);
1764 extern void _bfd_elf_swap_verdaux_in
1765 (bfd
*, const Elf_External_Verdaux
*, Elf_Internal_Verdaux
*);
1766 extern void _bfd_elf_swap_verdaux_out
1767 (bfd
*, const Elf_Internal_Verdaux
*, Elf_External_Verdaux
*);
1768 extern void _bfd_elf_swap_verneed_in
1769 (bfd
*, const Elf_External_Verneed
*, Elf_Internal_Verneed
*);
1770 extern void _bfd_elf_swap_verneed_out
1771 (bfd
*, const Elf_Internal_Verneed
*, Elf_External_Verneed
*);
1772 extern void _bfd_elf_swap_vernaux_in
1773 (bfd
*, const Elf_External_Vernaux
*, Elf_Internal_Vernaux
*);
1774 extern void _bfd_elf_swap_vernaux_out
1775 (bfd
*, const Elf_Internal_Vernaux
*, Elf_External_Vernaux
*);
1776 extern void _bfd_elf_swap_versym_in
1777 (bfd
*, const Elf_External_Versym
*, Elf_Internal_Versym
*);
1778 extern void _bfd_elf_swap_versym_out
1779 (bfd
*, const Elf_Internal_Versym
*, Elf_External_Versym
*);
1781 extern unsigned int _bfd_elf_section_from_bfd_section
1782 (bfd
*, asection
*);
1783 extern char *bfd_elf_string_from_elf_section
1784 (bfd
*, unsigned, unsigned);
1785 extern Elf_Internal_Sym
*bfd_elf_get_elf_syms
1786 (bfd
*, Elf_Internal_Shdr
*, size_t, size_t, Elf_Internal_Sym
*, void *,
1787 Elf_External_Sym_Shndx
*);
1788 extern const char *bfd_elf_sym_name
1789 (bfd
*, Elf_Internal_Shdr
*, Elf_Internal_Sym
*, asection
*);
1791 extern bfd_boolean _bfd_elf_copy_private_bfd_data
1793 extern bfd_boolean _bfd_elf_print_private_bfd_data
1795 const char * _bfd_elf_get_symbol_version_string
1796 (bfd
*, asymbol
*, bfd_boolean
*);
1797 extern void bfd_elf_print_symbol
1798 (bfd
*, void *, asymbol
*, bfd_print_symbol_type
);
1800 extern unsigned int _bfd_elf_eh_frame_address_size
1801 (bfd
*, asection
*);
1802 extern bfd_byte _bfd_elf_encode_eh_address
1803 (bfd
*abfd
, struct bfd_link_info
*info
, asection
*osec
, bfd_vma offset
,
1804 asection
*loc_sec
, bfd_vma loc_offset
, bfd_vma
*encoded
);
1805 extern bfd_boolean _bfd_elf_can_make_relative
1806 (bfd
*input_bfd
, struct bfd_link_info
*info
, asection
*eh_frame_section
);
1808 extern enum elf_reloc_type_class _bfd_elf_reloc_type_class
1809 (const struct bfd_link_info
*, const asection
*,
1810 const Elf_Internal_Rela
*);
1811 extern bfd_vma _bfd_elf_rela_local_sym
1812 (bfd
*, Elf_Internal_Sym
*, asection
**, Elf_Internal_Rela
*);
1813 extern bfd_vma _bfd_elf_rel_local_sym
1814 (bfd
*, Elf_Internal_Sym
*, asection
**, bfd_vma
);
1815 extern bfd_vma _bfd_elf_section_offset
1816 (bfd
*, struct bfd_link_info
*, asection
*, bfd_vma
);
1818 extern unsigned long bfd_elf_hash
1820 extern unsigned long bfd_elf_gnu_hash
1823 extern bfd_reloc_status_type bfd_elf_generic_reloc
1824 (bfd
*, arelent
*, asymbol
*, void *, asection
*, bfd
*, char **);
1825 extern bfd_boolean bfd_elf_allocate_object
1826 (bfd
*, size_t, enum elf_target_id
);
1827 extern bfd_boolean bfd_elf_make_object
1829 extern bfd_boolean bfd_elf_mkcorefile
1831 extern bfd_boolean _bfd_elf_make_section_from_shdr
1832 (bfd
*, Elf_Internal_Shdr
*, const char *, int);
1833 extern bfd_boolean _bfd_elf_make_section_from_phdr
1834 (bfd
*, Elf_Internal_Phdr
*, int, const char *);
1835 extern struct bfd_hash_entry
*_bfd_elf_link_hash_newfunc
1836 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *);
1837 extern struct bfd_link_hash_table
*_bfd_elf_link_hash_table_create
1839 extern void _bfd_elf_link_hash_table_free
1841 extern void _bfd_elf_link_hash_copy_indirect
1842 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
1843 struct elf_link_hash_entry
*);
1844 extern void _bfd_elf_link_hash_hide_symbol
1845 (struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd_boolean
);
1846 extern bfd_boolean _bfd_elf_link_hash_fixup_symbol
1847 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
1848 extern bfd_boolean _bfd_elf_link_hash_table_init
1849 (struct elf_link_hash_table
*, bfd
*,
1850 struct bfd_hash_entry
*(*)
1851 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *),
1852 unsigned int, enum elf_target_id
);
1853 extern bfd_boolean _bfd_elf_slurp_version_tables
1854 (bfd
*, bfd_boolean
);
1855 extern bfd_boolean _bfd_elf_merge_sections
1856 (bfd
*, struct bfd_link_info
*);
1857 extern bfd_boolean _bfd_elf_match_sections_by_type
1858 (bfd
*, const asection
*, bfd
*, const asection
*);
1859 extern bfd_boolean bfd_elf_is_group_section
1860 (bfd
*, const struct bfd_section
*);
1861 extern bfd_boolean _bfd_elf_section_already_linked
1862 (bfd
*, asection
*, struct bfd_link_info
*);
1863 extern void bfd_elf_set_group_contents
1864 (bfd
*, asection
*, void *);
1865 extern asection
*_bfd_elf_check_kept_section
1866 (asection
*, struct bfd_link_info
*);
1867 #define _bfd_elf_link_just_syms _bfd_generic_link_just_syms
1868 extern void _bfd_elf_copy_link_hash_symbol_type
1869 (bfd
*, struct bfd_link_hash_entry
*, struct bfd_link_hash_entry
*);
1870 extern bfd_boolean _bfd_elf_size_group_sections
1871 (struct bfd_link_info
*);
1872 extern bfd_boolean _bfd_elf_fixup_group_sections
1873 (bfd
*, asection
*);
1874 extern bfd_boolean _bfd_elf_copy_private_header_data
1876 extern bfd_boolean _bfd_elf_copy_private_symbol_data
1877 (bfd
*, asymbol
*, bfd
*, asymbol
*);
1878 #define _bfd_generic_init_private_section_data \
1879 _bfd_elf_init_private_section_data
1880 extern bfd_boolean _bfd_elf_init_private_section_data
1881 (bfd
*, asection
*, bfd
*, asection
*, struct bfd_link_info
*);
1882 extern bfd_boolean _bfd_elf_copy_private_section_data
1883 (bfd
*, asection
*, bfd
*, asection
*);
1884 extern bfd_boolean _bfd_elf_write_object_contents
1886 extern bfd_boolean _bfd_elf_write_corefile_contents
1888 extern bfd_boolean _bfd_elf_set_section_contents
1889 (bfd
*, sec_ptr
, const void *, file_ptr
, bfd_size_type
);
1890 extern long _bfd_elf_get_symtab_upper_bound
1892 extern long _bfd_elf_canonicalize_symtab
1893 (bfd
*, asymbol
**);
1894 extern long _bfd_elf_get_dynamic_symtab_upper_bound
1896 extern long _bfd_elf_canonicalize_dynamic_symtab
1897 (bfd
*, asymbol
**);
1898 extern long _bfd_elf_get_synthetic_symtab
1899 (bfd
*, long, asymbol
**, long, asymbol
**, asymbol
**);
1900 extern long _bfd_elf_get_reloc_upper_bound
1902 extern long _bfd_elf_canonicalize_reloc
1903 (bfd
*, sec_ptr
, arelent
**, asymbol
**);
1904 extern asection
* _bfd_elf_get_dynamic_reloc_section
1905 (bfd
*, asection
*, bfd_boolean
);
1906 extern asection
* _bfd_elf_make_dynamic_reloc_section
1907 (asection
*, bfd
*, unsigned int, bfd
*, bfd_boolean
);
1908 extern long _bfd_elf_get_dynamic_reloc_upper_bound
1910 extern long _bfd_elf_canonicalize_dynamic_reloc
1911 (bfd
*, arelent
**, asymbol
**);
1912 extern asymbol
*_bfd_elf_make_empty_symbol
1914 extern void _bfd_elf_get_symbol_info
1915 (bfd
*, asymbol
*, symbol_info
*);
1916 extern bfd_boolean _bfd_elf_is_local_label_name
1917 (bfd
*, const char *);
1918 extern alent
*_bfd_elf_get_lineno
1920 extern bfd_boolean _bfd_elf_set_arch_mach
1921 (bfd
*, enum bfd_architecture
, unsigned long);
1922 extern bfd_boolean _bfd_elf_find_nearest_line
1923 (bfd
*, asymbol
**, asection
*, bfd_vma
,
1924 const char **, const char **, unsigned int *, unsigned int *);
1925 extern bfd_boolean _bfd_elf_find_line
1926 (bfd
*, asymbol
**, asymbol
*, const char **, unsigned int *);
1927 extern bfd_boolean _bfd_elf_find_inliner_info
1928 (bfd
*, const char **, const char **, unsigned int *);
1929 extern bfd_boolean _bfd_elf_find_function
1930 (bfd
*, asymbol
**, asection
*, bfd_vma
, const char **, const char **);
1931 #define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols
1932 #define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
1933 extern int _bfd_elf_sizeof_headers
1934 (bfd
*, struct bfd_link_info
*);
1935 extern bfd_boolean _bfd_elf_new_section_hook
1936 (bfd
*, asection
*);
1937 extern const struct bfd_elf_special_section
*_bfd_elf_get_special_section
1938 (const char *, const struct bfd_elf_special_section
*, unsigned int);
1939 extern const struct bfd_elf_special_section
*_bfd_elf_get_sec_type_attr
1940 (bfd
*, asection
*);
1942 /* If the target doesn't have reloc handling written yet: */
1943 extern void _bfd_elf_no_info_to_howto
1944 (bfd
*, arelent
*, Elf_Internal_Rela
*);
1946 extern bfd_boolean bfd_section_from_shdr
1947 (bfd
*, unsigned int shindex
);
1948 extern bfd_boolean bfd_section_from_phdr
1949 (bfd
*, Elf_Internal_Phdr
*, int);
1951 extern int _bfd_elf_symbol_from_bfd_symbol
1952 (bfd
*, asymbol
**);
1954 extern Elf_Internal_Sym
*bfd_sym_from_r_symndx
1955 (struct sym_cache
*, bfd
*, unsigned long);
1956 extern asection
*bfd_section_from_elf_index
1957 (bfd
*, unsigned int);
1958 extern struct bfd_strtab_hash
*_bfd_elf_stringtab_init
1961 extern struct elf_strtab_hash
* _bfd_elf_strtab_init
1963 extern void _bfd_elf_strtab_free
1964 (struct elf_strtab_hash
*);
1965 extern bfd_size_type _bfd_elf_strtab_add
1966 (struct elf_strtab_hash
*, const char *, bfd_boolean
);
1967 extern void _bfd_elf_strtab_addref
1968 (struct elf_strtab_hash
*, bfd_size_type
);
1969 extern void _bfd_elf_strtab_delref
1970 (struct elf_strtab_hash
*, bfd_size_type
);
1971 extern unsigned int _bfd_elf_strtab_refcount
1972 (struct elf_strtab_hash
*, bfd_size_type
);
1973 extern void _bfd_elf_strtab_clear_all_refs
1974 (struct elf_strtab_hash
*tab
);
1975 extern void _bfd_elf_strtab_restore_size
1976 (struct elf_strtab_hash
*, bfd_size_type
);
1977 extern bfd_size_type _bfd_elf_strtab_size
1978 (struct elf_strtab_hash
*);
1979 extern bfd_size_type _bfd_elf_strtab_offset
1980 (struct elf_strtab_hash
*, bfd_size_type
);
1981 extern bfd_boolean _bfd_elf_strtab_emit
1982 (bfd
*, struct elf_strtab_hash
*);
1983 extern void _bfd_elf_strtab_finalize
1984 (struct elf_strtab_hash
*);
1986 extern void _bfd_elf_parse_eh_frame
1987 (bfd
*, struct bfd_link_info
*, asection
*, struct elf_reloc_cookie
*);
1988 extern bfd_boolean _bfd_elf_discard_section_eh_frame
1989 (bfd
*, struct bfd_link_info
*, asection
*,
1990 bfd_boolean (*) (bfd_vma
, void *), struct elf_reloc_cookie
*);
1991 extern bfd_boolean _bfd_elf_discard_section_eh_frame_hdr
1992 (bfd
*, struct bfd_link_info
*);
1993 extern bfd_vma _bfd_elf_eh_frame_section_offset
1994 (bfd
*, struct bfd_link_info
*, asection
*, bfd_vma
);
1995 extern bfd_boolean _bfd_elf_write_section_eh_frame
1996 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
1997 extern bfd_boolean _bfd_elf_write_section_eh_frame_hdr
1998 (bfd
*, struct bfd_link_info
*);
1999 extern bfd_boolean _bfd_elf_eh_frame_present
2000 (struct bfd_link_info
*);
2001 extern bfd_boolean _bfd_elf_maybe_strip_eh_frame_hdr
2002 (struct bfd_link_info
*);
2004 extern bfd_boolean
_bfd_elf_hash_symbol (struct elf_link_hash_entry
*);
2006 extern long _bfd_elf_link_lookup_local_dynindx
2007 (struct bfd_link_info
*, bfd
*, long);
2008 extern bfd_boolean _bfd_elf_compute_section_file_positions
2009 (bfd
*, struct bfd_link_info
*);
2010 extern file_ptr _bfd_elf_assign_file_position_for_section
2011 (Elf_Internal_Shdr
*, file_ptr
, bfd_boolean
);
2013 extern bfd_boolean _bfd_elf_validate_reloc
2016 extern bfd_boolean _bfd_elf_link_create_dynamic_sections
2017 (bfd
*, struct bfd_link_info
*);
2018 extern bfd_boolean _bfd_elf_link_omit_section_dynsym
2019 (bfd
*, struct bfd_link_info
*, asection
*);
2020 extern bfd_boolean _bfd_elf_create_dynamic_sections
2021 (bfd
*, struct bfd_link_info
*);
2022 extern bfd_boolean _bfd_elf_create_got_section
2023 (bfd
*, struct bfd_link_info
*);
2024 extern struct elf_link_hash_entry
*_bfd_elf_define_linkage_sym
2025 (bfd
*, struct bfd_link_info
*, asection
*, const char *);
2026 extern void _bfd_elf_init_1_index_section
2027 (bfd
*, struct bfd_link_info
*);
2028 extern void _bfd_elf_init_2_index_sections
2029 (bfd
*, struct bfd_link_info
*);
2031 extern bfd_boolean _bfd_elfcore_make_pseudosection
2032 (bfd
*, char *, size_t, ufile_ptr
);
2033 extern char *_bfd_elfcore_strndup
2034 (bfd
*, char *, size_t);
2036 extern Elf_Internal_Rela
*_bfd_elf_link_read_relocs
2037 (bfd
*, asection
*, void *, Elf_Internal_Rela
*, bfd_boolean
);
2039 extern bfd_boolean _bfd_elf_link_output_relocs
2040 (bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*,
2041 struct elf_link_hash_entry
**);
2043 extern bfd_boolean _bfd_elf_adjust_dynamic_copy
2044 (struct bfd_link_info
*, struct elf_link_hash_entry
*, asection
*);
2046 extern bfd_boolean _bfd_elf_dynamic_symbol_p
2047 (struct elf_link_hash_entry
*, struct bfd_link_info
*, bfd_boolean
);
2049 extern bfd_boolean _bfd_elf_symbol_refs_local_p
2050 (struct elf_link_hash_entry
*, struct bfd_link_info
*, bfd_boolean
);
2052 extern bfd_reloc_status_type bfd_elf_perform_complex_relocation
2053 (bfd
*, asection
*, bfd_byte
*, Elf_Internal_Rela
*, bfd_vma
);
2055 extern bfd_boolean _bfd_elf_setup_sections
2058 extern void _bfd_elf_post_process_headers (bfd
* , struct bfd_link_info
*);
2060 extern const bfd_target
*bfd_elf32_object_p
2062 extern const bfd_target
*bfd_elf32_core_file_p
2064 extern char *bfd_elf32_core_file_failing_command
2066 extern int bfd_elf32_core_file_failing_signal
2068 extern bfd_boolean bfd_elf32_core_file_matches_executable_p
2070 extern int bfd_elf32_core_file_pid
2073 extern bfd_boolean bfd_elf32_swap_symbol_in
2074 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
2075 extern void bfd_elf32_swap_symbol_out
2076 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
2077 extern void bfd_elf32_swap_reloc_in
2078 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2079 extern void bfd_elf32_swap_reloc_out
2080 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2081 extern void bfd_elf32_swap_reloca_in
2082 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2083 extern void bfd_elf32_swap_reloca_out
2084 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2085 extern void bfd_elf32_swap_phdr_in
2086 (bfd
*, const Elf32_External_Phdr
*, Elf_Internal_Phdr
*);
2087 extern void bfd_elf32_swap_phdr_out
2088 (bfd
*, const Elf_Internal_Phdr
*, Elf32_External_Phdr
*);
2089 extern void bfd_elf32_swap_dyn_in
2090 (bfd
*, const void *, Elf_Internal_Dyn
*);
2091 extern void bfd_elf32_swap_dyn_out
2092 (bfd
*, const Elf_Internal_Dyn
*, void *);
2093 extern long bfd_elf32_slurp_symbol_table
2094 (bfd
*, asymbol
**, bfd_boolean
);
2095 extern bfd_boolean bfd_elf32_write_shdrs_and_ehdr
2097 extern int bfd_elf32_write_out_phdrs
2098 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
2099 extern bfd_boolean bfd_elf32_checksum_contents
2100 (bfd
* , void (*) (const void *, size_t, void *), void *);
2101 extern void bfd_elf32_write_relocs
2102 (bfd
*, asection
*, void *);
2103 extern bfd_boolean bfd_elf32_slurp_reloc_table
2104 (bfd
*, asection
*, asymbol
**, bfd_boolean
);
2106 extern const bfd_target
*bfd_elf64_object_p
2108 extern const bfd_target
*bfd_elf64_core_file_p
2110 extern char *bfd_elf64_core_file_failing_command
2112 extern int bfd_elf64_core_file_failing_signal
2114 extern bfd_boolean bfd_elf64_core_file_matches_executable_p
2116 extern int bfd_elf64_core_file_pid
2119 extern bfd_boolean bfd_elf64_swap_symbol_in
2120 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
2121 extern void bfd_elf64_swap_symbol_out
2122 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
2123 extern void bfd_elf64_swap_reloc_in
2124 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2125 extern void bfd_elf64_swap_reloc_out
2126 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2127 extern void bfd_elf64_swap_reloca_in
2128 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2129 extern void bfd_elf64_swap_reloca_out
2130 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2131 extern void bfd_elf64_swap_phdr_in
2132 (bfd
*, const Elf64_External_Phdr
*, Elf_Internal_Phdr
*);
2133 extern void bfd_elf64_swap_phdr_out
2134 (bfd
*, const Elf_Internal_Phdr
*, Elf64_External_Phdr
*);
2135 extern void bfd_elf64_swap_dyn_in
2136 (bfd
*, const void *, Elf_Internal_Dyn
*);
2137 extern void bfd_elf64_swap_dyn_out
2138 (bfd
*, const Elf_Internal_Dyn
*, void *);
2139 extern long bfd_elf64_slurp_symbol_table
2140 (bfd
*, asymbol
**, bfd_boolean
);
2141 extern bfd_boolean bfd_elf64_write_shdrs_and_ehdr
2143 extern int bfd_elf64_write_out_phdrs
2144 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
2145 extern bfd_boolean bfd_elf64_checksum_contents
2146 (bfd
* , void (*) (const void *, size_t, void *), void *);
2147 extern void bfd_elf64_write_relocs
2148 (bfd
*, asection
*, void *);
2149 extern bfd_boolean bfd_elf64_slurp_reloc_table
2150 (bfd
*, asection
*, asymbol
**, bfd_boolean
);
2152 extern bfd_boolean _bfd_elf_default_relocs_compatible
2153 (const bfd_target
*, const bfd_target
*);
2155 extern bfd_boolean _bfd_elf_relocs_compatible
2156 (const bfd_target
*, const bfd_target
*);
2157 extern bfd_boolean _bfd_elf_notice_as_needed
2158 (bfd
*, struct bfd_link_info
*, enum notice_asneeded_action
);
2160 extern struct elf_link_hash_entry
*_bfd_elf_archive_symbol_lookup
2161 (bfd
*, struct bfd_link_info
*, const char *);
2162 extern bfd_boolean bfd_elf_link_add_symbols
2163 (bfd
*, struct bfd_link_info
*);
2164 extern bfd_boolean _bfd_elf_add_dynamic_entry
2165 (struct bfd_link_info
*, bfd_vma
, bfd_vma
);
2167 extern bfd_boolean bfd_elf_link_record_dynamic_symbol
2168 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
2170 extern int bfd_elf_link_record_local_dynamic_symbol
2171 (struct bfd_link_info
*, bfd
*, long);
2173 extern bfd_boolean _bfd_elf_close_and_cleanup
2176 extern bfd_boolean _bfd_elf_common_definition
2177 (Elf_Internal_Sym
*);
2179 extern unsigned int _bfd_elf_common_section_index
2182 extern asection
*_bfd_elf_common_section
2185 extern bfd_vma _bfd_elf_default_got_elt_size
2186 (bfd
*, struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd
*,
2189 extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn
2190 (bfd
*, arelent
*, struct bfd_symbol
*, void *,
2191 asection
*, bfd
*, char **);
2193 extern bfd_boolean bfd_elf_final_link
2194 (bfd
*, struct bfd_link_info
*);
2196 extern void _bfd_elf_gc_keep
2197 (struct bfd_link_info
*info
);
2199 extern bfd_boolean bfd_elf_gc_mark_dynamic_ref_symbol
2200 (struct elf_link_hash_entry
*h
, void *inf
);
2202 extern bfd_boolean bfd_elf_gc_sections
2203 (bfd
*, struct bfd_link_info
*);
2205 extern bfd_boolean bfd_elf_gc_record_vtinherit
2206 (bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
);
2208 extern bfd_boolean bfd_elf_gc_record_vtentry
2209 (bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
);
2211 extern asection
*_bfd_elf_gc_mark_hook
2212 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
2213 struct elf_link_hash_entry
*, Elf_Internal_Sym
*);
2215 extern asection
*_bfd_elf_gc_mark_rsec
2216 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
,
2217 struct elf_reloc_cookie
*);
2219 extern bfd_boolean _bfd_elf_gc_mark_reloc
2220 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
,
2221 struct elf_reloc_cookie
*);
2223 extern bfd_boolean _bfd_elf_gc_mark_fdes
2224 (struct bfd_link_info
*, asection
*, asection
*, elf_gc_mark_hook_fn
,
2225 struct elf_reloc_cookie
*);
2227 extern bfd_boolean _bfd_elf_gc_mark
2228 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
);
2230 extern bfd_boolean _bfd_elf_gc_mark_extra_sections
2231 (struct bfd_link_info
*, elf_gc_mark_hook_fn
);
2233 extern bfd_boolean bfd_elf_gc_common_finalize_got_offsets
2234 (bfd
*, struct bfd_link_info
*);
2236 extern bfd_boolean bfd_elf_gc_common_final_link
2237 (bfd
*, struct bfd_link_info
*);
2239 extern bfd_boolean bfd_elf_reloc_symbol_deleted_p
2242 extern struct elf_segment_map
* _bfd_elf_make_dynamic_segment
2243 (bfd
*, asection
*);
2245 extern bfd_boolean _bfd_elf_map_sections_to_segments
2246 (bfd
*, struct bfd_link_info
*);
2248 extern bfd_boolean
_bfd_elf_is_function_type (unsigned int);
2250 extern bfd_size_type
_bfd_elf_maybe_function_sym (const asymbol
*, asection
*,
2253 extern asection
*_bfd_elf_get_reloc_section (asection
*);
2255 extern int bfd_elf_get_default_section_type (flagword
);
2257 extern bfd_boolean bfd_elf_lookup_section_flags
2258 (struct bfd_link_info
*, struct flag_info
*, asection
*);
2260 extern Elf_Internal_Phdr
* _bfd_elf_find_segment_containing_section
2261 (bfd
* abfd
, asection
* section
);
2263 /* Exported interface for writing elf corefile notes. */
2264 extern char *elfcore_write_note
2265 (bfd
*, char *, int *, const char *, int, const void *, int);
2266 extern char *elfcore_write_prpsinfo
2267 (bfd
*, char *, int *, const char *, const char *);
2268 extern char *elfcore_write_prstatus
2269 (bfd
*, char *, int *, long, int, const void *);
2270 extern char * elfcore_write_pstatus
2271 (bfd
*, char *, int *, long, int, const void *);
2272 extern char *elfcore_write_prfpreg
2273 (bfd
*, char *, int *, const void *, int);
2274 extern char *elfcore_write_prxfpreg
2275 (bfd
*, char *, int *, const void *, int);
2276 extern char *elfcore_write_xstatereg
2277 (bfd
*, char *, int *, const void *, int);
2278 extern char *elfcore_write_ppc_vmx
2279 (bfd
*, char *, int *, const void *, int);
2280 extern char *elfcore_write_ppc_vsx
2281 (bfd
*, char *, int *, const void *, int);
2282 extern char *elfcore_write_s390_timer
2283 (bfd
*, char *, int *, const void *, int);
2284 extern char *elfcore_write_s390_todcmp
2285 (bfd
*, char *, int *, const void *, int);
2286 extern char *elfcore_write_s390_todpreg
2287 (bfd
*, char *, int *, const void *, int);
2288 extern char *elfcore_write_s390_ctrs
2289 (bfd
*, char *, int *, const void *, int);
2290 extern char *elfcore_write_s390_prefix
2291 (bfd
*, char *, int *, const void *, int);
2292 extern char *elfcore_write_s390_last_break
2293 (bfd
*, char *, int *, const void *, int);
2294 extern char *elfcore_write_s390_system_call
2295 (bfd
*, char *, int *, const void *, int);
2296 extern char *elfcore_write_s390_tdb
2297 (bfd
*, char *, int *, const void *, int);
2298 extern char *elfcore_write_s390_vxrs_low
2299 (bfd
*, char *, int *, const void *, int);
2300 extern char *elfcore_write_s390_vxrs_high
2301 (bfd
*, char *, int *, const void *, int);
2302 extern char *elfcore_write_arm_vfp
2303 (bfd
*, char *, int *, const void *, int);
2304 extern char *elfcore_write_aarch_tls
2305 (bfd
*, char *, int *, const void *, int);
2306 extern char *elfcore_write_aarch_hw_break
2307 (bfd
*, char *, int *, const void *, int);
2308 extern char *elfcore_write_aarch_hw_watch
2309 (bfd
*, char *, int *, const void *, int);
2310 extern char *elfcore_write_lwpstatus
2311 (bfd
*, char *, int *, long, int, const void *);
2312 extern char *elfcore_write_register_note
2313 (bfd
*, char *, int *, const char *, const void *, int);
2315 /* Internal structure which holds information to be included in the
2316 PRPSINFO section of Linux core files.
2318 This is an "internal" structure in the sense that it should be used
2319 to pass information to BFD (via the `elfcore_write_linux_prpsinfo'
2320 function), so things like endianess shouldn't be an issue. This
2321 structure will eventually be converted in one of the
2322 `elf_external_linux_*' structures and written out to an output bfd
2323 by one of the functions declared below. */
2325 struct elf_internal_linux_prpsinfo
2327 char pr_state
; /* Numeric process state. */
2328 char pr_sname
; /* Char for pr_state. */
2329 char pr_zomb
; /* Zombie. */
2330 char pr_nice
; /* Nice val. */
2331 unsigned long pr_flag
; /* Flags. */
2332 unsigned int pr_uid
;
2333 unsigned int pr_gid
;
2334 int pr_pid
, pr_ppid
, pr_pgrp
, pr_sid
;
2335 char pr_fname
[16 + 1]; /* Filename of executable. */
2336 char pr_psargs
[80 + 1]; /* Initial part of arg list. */
2339 /* Linux/most 32-bit archs. */
2340 extern char *elfcore_write_linux_prpsinfo32
2341 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
2343 /* Linux/most 64-bit archs. */
2344 extern char *elfcore_write_linux_prpsinfo64
2345 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
2347 /* Linux/PPC32 uses different layout compared to most archs. */
2348 extern char *elfcore_write_ppc_linux_prpsinfo32
2349 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
2351 extern bfd
*_bfd_elf32_bfd_from_remote_memory
2352 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
2353 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, bfd_size_type
));
2354 extern bfd
*_bfd_elf64_bfd_from_remote_memory
2355 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
2356 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, bfd_size_type
));
2358 extern bfd_vma
bfd_elf_obj_attr_size (bfd
*);
2359 extern void bfd_elf_set_obj_attr_contents (bfd
*, bfd_byte
*, bfd_vma
);
2360 extern int bfd_elf_get_obj_attr_int (bfd
*, int, int);
2361 extern void bfd_elf_add_obj_attr_int (bfd
*, int, int, unsigned int);
2362 #define bfd_elf_add_proc_attr_int(BFD, TAG, VALUE) \
2363 bfd_elf_add_obj_attr_int ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2364 extern void bfd_elf_add_obj_attr_string (bfd
*, int, int, const char *);
2365 #define bfd_elf_add_proc_attr_string(BFD, TAG, VALUE) \
2366 bfd_elf_add_obj_attr_string ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2367 extern void bfd_elf_add_obj_attr_int_string (bfd
*, int, int, unsigned int,
2369 #define bfd_elf_add_proc_attr_int_string(BFD, TAG, INTVAL, STRVAL) \
2370 bfd_elf_add_obj_attr_int_string ((BFD), OBJ_ATTR_PROC, (TAG), \
2373 extern char *_bfd_elf_attr_strdup (bfd
*, const char *);
2374 extern void _bfd_elf_copy_obj_attributes (bfd
*, bfd
*);
2375 extern int _bfd_elf_obj_attrs_arg_type (bfd
*, int, int);
2376 extern void _bfd_elf_parse_attributes (bfd
*, Elf_Internal_Shdr
*);
2377 extern bfd_boolean
_bfd_elf_merge_object_attributes (bfd
*, bfd
*);
2378 extern bfd_boolean
_bfd_elf_merge_unknown_attribute_low (bfd
*, bfd
*, int);
2379 extern bfd_boolean
_bfd_elf_merge_unknown_attribute_list (bfd
*, bfd
*);
2380 extern Elf_Internal_Shdr
*_bfd_elf_single_rel_hdr (asection
*sec
);
2382 /* The linker may need to keep track of the number of relocs that it
2383 decides to copy as dynamic relocs in check_relocs for each symbol.
2384 This is so that it can later discard them if they are found to be
2385 unnecessary. We can store the information in a field extending the
2386 regular ELF linker hash table. */
2388 struct elf_dyn_relocs
2390 struct elf_dyn_relocs
*next
;
2392 /* The input section of the reloc. */
2395 /* Total number of relocs copied for the input section. */
2396 bfd_size_type count
;
2398 /* Number of pc-relative relocs copied for the input section. */
2399 bfd_size_type pc_count
;
2402 extern bfd_boolean _bfd_elf_create_ifunc_sections
2403 (bfd
*, struct bfd_link_info
*);
2404 extern bfd_boolean _bfd_elf_allocate_ifunc_dyn_relocs
2405 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
2406 struct elf_dyn_relocs
**, unsigned int, unsigned int, unsigned int);
2407 extern long _bfd_elf_ifunc_get_synthetic_symtab
2408 (bfd
*, long, asymbol
**, long, asymbol
**, asymbol
**, asection
*,
2409 bfd_vma
*(*) (bfd
*, asymbol
**, asection
*, asection
*));
2411 extern void elf_append_rela (bfd
*, asection
*, Elf_Internal_Rela
*);
2412 extern void elf_append_rel (bfd
*, asection
*, Elf_Internal_Rela
*);
2414 extern bfd_vma
elf64_r_info (bfd_vma
, bfd_vma
);
2415 extern bfd_vma
elf64_r_sym (bfd_vma
);
2416 extern bfd_vma
elf32_r_info (bfd_vma
, bfd_vma
);
2417 extern bfd_vma
elf32_r_sym (bfd_vma
);
2419 /* Large common section. */
2420 extern asection _bfd_elf_large_com_section
;
2422 /* Hash for local symbol with the first section id, ID, in the input
2423 file and the local symbol index, SYM. */
2424 #define ELF_LOCAL_SYMBOL_HASH(ID, SYM) \
2425 (((((ID) & 0xff) << 24) | (((ID) & 0xff00) << 8)) \
2426 ^ (SYM) ^ ((ID) >> 16))
2428 /* This is the condition under which finish_dynamic_symbol will be called.
2429 If our finish_dynamic_symbol isn't called, we'll need to do something
2430 about initializing any .plt and .got entries in relocate_section. */
2431 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
2433 && ((SHARED) || !(H)->forced_local) \
2434 && ((H)->dynindx != -1 || (H)->forced_local))
2436 /* This macro is to avoid lots of duplicated code in the body
2437 of xxx_relocate_section() in the various elfxx-xxxx.c files. */
2438 #define RELOC_FOR_GLOBAL_SYMBOL(info, input_bfd, input_section, rel, \
2439 r_symndx, symtab_hdr, sym_hashes, \
2440 h, sec, relocation, \
2441 unresolved_reloc, warned, ignored) \
2444 /* It seems this can happen with erroneous or unsupported \
2445 input (mixing a.out and elf in an archive, for example.) */ \
2446 if (sym_hashes == NULL) \
2449 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; \
2451 if (info->wrap_hash != NULL \
2452 && (input_section->flags & SEC_DEBUGGING) != 0) \
2453 h = ((struct elf_link_hash_entry *) \
2454 unwrap_hash_lookup (info, input_bfd, &h->root)); \
2456 while (h->root.type == bfd_link_hash_indirect \
2457 || h->root.type == bfd_link_hash_warning) \
2458 h = (struct elf_link_hash_entry *) h->root.u.i.link; \
2462 unresolved_reloc = FALSE; \
2464 if (h->root.type == bfd_link_hash_defined \
2465 || h->root.type == bfd_link_hash_defweak) \
2467 sec = h->root.u.def.section; \
2469 || sec->output_section == NULL) \
2470 /* Set a flag that will be cleared later if we find a \
2471 relocation value for this symbol. output_section \
2472 is typically NULL for symbols satisfied by a shared \
2474 unresolved_reloc = TRUE; \
2476 relocation = (h->root.u.def.value \
2477 + sec->output_section->vma \
2478 + sec->output_offset); \
2480 else if (h->root.type == bfd_link_hash_undefweak) \
2482 else if (info->unresolved_syms_in_objects == RM_IGNORE \
2483 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) \
2485 else if (!info->relocatable) \
2488 err = (info->unresolved_syms_in_objects == RM_GENERATE_ERROR \
2489 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT); \
2490 if (!info->callbacks->undefined_symbol (info, \
2491 h->root.root.string, \
2494 rel->r_offset, err)) \
2498 (void) unresolved_reloc; \
2504 /* This macro is to avoid lots of duplicated code in the body of the
2505 loop over relocations in xxx_relocate_section() in the various
2508 Handle relocations against symbols from removed linkonce sections,
2509 or sections discarded by a linker script. When doing a relocatable
2510 link, we remove such relocations. Otherwise, we just want the
2511 section contents zeroed and avoid any special processing. */
2512 #define RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
2513 rel, count, relend, \
2514 howto, index, contents) \
2517 _bfd_clear_contents (howto, input_bfd, input_section, \
2518 contents + rel[index].r_offset); \
2520 if (info->relocatable \
2521 && (input_section->flags & SEC_DEBUGGING)) \
2523 /* Only remove relocations in debug sections since other \
2524 sections may require relocations. */ \
2525 Elf_Internal_Shdr *rel_hdr; \
2527 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
2529 /* Avoid empty output section. */ \
2530 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
2532 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
2533 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
2534 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
2536 memmove (rel, rel + count, \
2537 (relend - rel - count) * sizeof (*rel)); \
2539 input_section->reloc_count--; \
2546 for (i_ = 0; i_ < count; i_++) \
2548 rel[i_].r_info = 0; \
2549 rel[i_].r_addend = 0; \
2555 /* Will a symbol be bound to the definition within the shared
2556 library, if any. A unique symbol can never be bound locally. */
2557 #define SYMBOLIC_BIND(INFO, H) \
2558 (!(H)->unique_global \
2559 && ((INFO)->symbolic || ((INFO)->dynamic && !(H)->dynamic)))
2564 #endif /* _LIBELF_H_ */