1 /* BFD back-end data structures for ELF files.
2 Copyright (C) 1992-2021 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 symbol version. */
112 enum elf_symbol_version
120 /* ELF linker hash table entries. */
122 struct elf_link_hash_entry
124 struct bfd_link_hash_entry root
;
126 /* Symbol index in output file. This is initialized to -1. It is
127 set to -2 if the symbol is used by a reloc. It is set to -3 if
128 this symbol is defined in a discarded section. */
131 /* Symbol index as a dynamic symbol. Initialized to -1, and remains
132 -1 if this is not a dynamic symbol. */
133 /* ??? Note that this is consistently used as a synonym for tests
134 against whether we can perform various simplifying transformations
135 to the code. (E.g. changing a pc-relative jump to a PLT entry
136 into a pc-relative jump to the target function.) That test, which
137 is often relatively complex, and someplaces wrong or incomplete,
138 should really be replaced by a predicate in elflink.c.
140 End result: this field -1 does not indicate that the symbol is
141 not in the dynamic symbol table, but rather that the symbol is
142 not visible outside this DSO. */
145 /* If this symbol requires an entry in the global offset table, the
146 processor specific backend uses this field to track usage and
147 final offset. Two schemes are supported: The first assumes that
148 a symbol may only have one GOT entry, and uses REFCOUNT until
149 size_dynamic_sections, at which point the contents of the .got is
150 fixed. Afterward, if OFFSET is -1, then the symbol does not
151 require a global offset table entry. The second scheme allows
152 multiple GOT entries per symbol, managed via a linked list
153 pointed to by GLIST. */
154 union gotplt_union got
;
156 /* Same, but tracks a procedure linkage table entry. */
157 union gotplt_union plt
;
159 /* Symbol size. NB: All fields starting from here are cleared by
160 _bfd_elf_link_hash_newfunc. */
163 /* Track dynamic relocs copied for this symbol. */
164 struct elf_dyn_relocs
*dyn_relocs
;
166 /* Symbol type (STT_NOTYPE, STT_OBJECT, etc.). */
167 unsigned int type
: 8;
169 /* Symbol st_other value, symbol visibility. */
170 unsigned int other
: 8;
172 /* The symbol's st_target_internal value (see Elf_Internal_Sym). */
173 unsigned int target_internal
: 8;
175 /* Symbol is referenced by a non-shared object (other than the object
176 in which it is defined). */
177 unsigned int ref_regular
: 1;
178 /* Symbol is defined by a non-shared object. */
179 unsigned int def_regular
: 1;
180 /* Symbol is referenced by a shared object. */
181 unsigned int ref_dynamic
: 1;
182 /* Symbol is defined by a shared object. */
183 unsigned int def_dynamic
: 1;
184 /* Symbol has a non-weak reference from a non-shared object (other than
185 the object in which it is defined). */
186 unsigned int ref_regular_nonweak
: 1;
187 /* Symbol has a non-weak reference from a LTO IR object file. */
188 unsigned int ref_ir_nonweak
: 1;
189 /* Dynamic symbol has been adjustd. */
190 unsigned int dynamic_adjusted
: 1;
191 /* Symbol needs a copy reloc. */
192 unsigned int needs_copy
: 1;
193 /* Symbol needs a procedure linkage table entry. */
194 unsigned int needs_plt
: 1;
195 /* Symbol appears in a non-ELF input file. */
196 unsigned int non_elf
: 1;
197 /* Symbol version information. */
198 ENUM_BITFIELD (elf_symbol_version
) versioned
: 2;
199 /* Symbol was forced to local scope due to a version script file. */
200 unsigned int forced_local
: 1;
201 /* Symbol was forced to be dynamic due to a version script file. */
202 unsigned int dynamic
: 1;
203 /* Symbol was marked during garbage collection. */
204 unsigned int mark
: 1;
205 /* Symbol is referenced by a non-GOT/non-PLT relocation. This is
206 not currently set by all the backends. */
207 unsigned int non_got_ref
: 1;
208 /* Symbol has a definition in a shared object.
209 FIXME: There is no real need for this field if def_dynamic is never
210 cleared and all places that test def_dynamic also test def_regular. */
211 unsigned int dynamic_def
: 1;
212 /* Symbol has a non-weak reference from a shared object. */
213 unsigned int ref_dynamic_nonweak
: 1;
214 /* Symbol is referenced with a relocation where C/C++ pointer equality
216 unsigned int pointer_equality_needed
: 1;
217 /* Symbol is a unique global symbol. */
218 unsigned int unique_global
: 1;
219 /* Symbol is defined by a shared library with non-default visibility
220 in a read/write section. */
221 unsigned int protected_def
: 1;
222 /* Symbol is __start_SECNAME or __stop_SECNAME to mark section
224 unsigned int start_stop
: 1;
225 /* Symbol is or was a weak defined symbol from a dynamic object with
226 a strong defined symbol alias. U.ALIAS points to a list of aliases,
227 the definition having is_weakalias clear. */
228 unsigned int is_weakalias
: 1;
230 /* String table index in .dynstr if this is a dynamic symbol. */
231 unsigned long dynstr_index
;
235 /* Points to a circular list of non-function symbol aliases. */
236 struct elf_link_hash_entry
*alias
;
238 /* Hash value of the name computed using the ELF hash function.
239 Used part way through size_dynamic_sections, after we've finished
241 unsigned long elf_hash_value
;
244 /* Version information. */
247 /* This field is used for a symbol which is not defined in a
248 regular object. It points to the version information read in
249 from the dynamic object. */
250 Elf_Internal_Verdef
*verdef
;
251 /* This field is used for a symbol which is defined in a regular
252 object. It is set up in size_dynamic_sections. It points to
253 the version information we should write out for this symbol. */
254 struct bfd_elf_version_tree
*vertree
;
259 /* For __start_SECNAME and __stop_SECNAME symbols, record the first
260 input section whose section name is SECNAME. */
261 asection
*start_stop_section
;
263 /* Vtable information. */
264 struct elf_link_virtual_table_entry
*vtable
;
268 /* Return the strong definition for a weak symbol with aliases. */
270 static inline struct elf_link_hash_entry
*
271 weakdef (struct elf_link_hash_entry
*h
)
273 while (h
->is_weakalias
)
278 /* Will references to this symbol always reference the symbol
280 #define SYMBOL_REFERENCES_LOCAL(INFO, H) \
281 _bfd_elf_symbol_refs_local_p (H, INFO, 0)
283 /* Will _calls_ to this symbol always call the version in this object? */
284 #define SYMBOL_CALLS_LOCAL(INFO, H) \
285 _bfd_elf_symbol_refs_local_p (H, INFO, 1)
287 /* Whether an undefined weak symbol should resolve to its link-time
288 value, even in PIC or PIE objects. */
289 #define UNDEFWEAK_NO_DYNAMIC_RELOC(INFO, H) \
290 ((H)->root.type == bfd_link_hash_undefweak \
291 && (ELF_ST_VISIBILITY ((H)->other) != STV_DEFAULT \
292 || (INFO)->dynamic_undefined_weak == 0))
294 /* Common symbols that are turned into definitions don't have the
295 DEF_REGULAR flag set, so they might appear to be undefined.
296 Symbols defined in linker scripts also don't have DEF_REGULAR set. */
297 #define ELF_COMMON_DEF_P(H) \
299 && !(H)->def_dynamic \
300 && (H)->root.type == bfd_link_hash_defined)
302 /* Records local symbols to be emitted in the dynamic symbol table. */
304 struct elf_link_local_dynamic_entry
306 struct elf_link_local_dynamic_entry
*next
;
308 /* The input bfd this symbol came from. */
311 /* The index of the local symbol being copied. */
314 /* The index in the outgoing dynamic symbol table. */
317 /* A copy of the input symbol. */
318 Elf_Internal_Sym isym
;
321 struct elf_link_loaded_list
323 struct elf_link_loaded_list
*next
;
327 /* Structures used by the eh_frame optimization code. */
332 /* If REMOVED == 1, this is the CIE that the FDE originally used.
333 The CIE belongs to the same .eh_frame input section as the FDE.
335 If REMOVED == 0, this is the CIE that we have chosen to use for
336 the output FDE. The CIE's REMOVED field is also 0, but the CIE
337 might belong to a different .eh_frame input section from the FDE.
339 May be NULL to signify that the FDE should be discarded. */
340 struct eh_cie_fde
*cie_inf
;
341 struct eh_cie_fde
*next_for_section
;
344 /* CIEs have three states:
346 - REMOVED && !MERGED: Slated for removal because we haven't yet
347 proven that an FDE needs it. FULL_CIE, if nonnull, points to
348 more detailed information about the CIE.
350 - REMOVED && MERGED: We have merged this CIE with MERGED_WITH,
351 which may not belong to the same input section.
353 - !REMOVED: We have decided to keep this CIE. SEC is the
354 .eh_frame input section that contains the CIE. */
356 struct cie
*full_cie
;
357 struct eh_cie_fde
*merged_with
;
361 /* The offset of the personality data from the start of the CIE,
362 or 0 if the CIE doesn't have any. */
363 unsigned int personality_offset
: 8;
365 /* Length of augmentation. aug_str_len is the length of the
366 string including null terminator. aug_data_len is the length
367 of the rest up to the initial insns. */
368 unsigned int aug_str_len
: 3;
369 unsigned int aug_data_len
: 5;
371 /* True if we have marked relocations associated with this CIE. */
372 unsigned int gc_mark
: 1;
374 /* True if we have decided to turn an absolute LSDA encoding into
375 a PC-relative one. */
376 unsigned int make_lsda_relative
: 1;
378 /* True if we have decided to turn an absolute personality
379 encoding into a PC-relative one. */
380 unsigned int make_per_encoding_relative
: 1;
382 /* True if the CIE contains personality data and if that
383 data uses a PC-relative encoding. Always true when
384 make_per_encoding_relative is. */
385 unsigned int per_encoding_relative
: 1;
387 /* True if the CIE contains personality data aligned to a
388 multiple of eight bytes. */
389 unsigned int per_encoding_aligned8
: 1;
391 /* True if we need to add an 'R' (FDE encoding) entry to the
392 CIE's augmentation data. */
393 unsigned int add_fde_encoding
: 1;
395 /* True if we have merged this CIE with another. */
396 unsigned int merged
: 1;
399 unsigned int pad1
: 9;
402 unsigned int reloc_index
;
405 unsigned int new_offset
;
406 unsigned int fde_encoding
: 8;
407 unsigned int lsda_encoding
: 8;
408 unsigned int lsda_offset
: 8;
410 /* True if this entry represents a CIE, false if it represents an FDE. */
411 unsigned int cie
: 1;
413 /* True if this entry is currently marked for removal. */
414 unsigned int removed
: 1;
416 /* True if we need to add a 'z' (augmentation size) entry to the CIE's
417 augmentation data, and an associated byte to each of the CIE's FDEs. */
418 unsigned int add_augmentation_size
: 1;
420 /* True if we have decided to convert absolute FDE relocations into
421 relative ones. This applies to the first relocation in the FDE,
422 which is against the code that the FDE describes. */
423 unsigned int make_relative
: 1;
426 unsigned int pad1
: 4;
428 unsigned int *set_loc
;
431 struct eh_frame_sec_info
435 struct eh_cie_fde entry
[1];
438 struct eh_frame_array_ent
447 #define DWARF2_EH_HDR 1
448 #define COMPACT_EH_HDR 2
450 /* Endian-neutral code indicating that a function cannot be unwound. */
451 #define COMPACT_EH_CANT_UNWIND_OPCODE 0x015d5d01
453 struct dwarf_eh_frame_hdr_info
456 unsigned int fde_count
;
457 /* TRUE if .eh_frame_hdr should contain the sorted search table.
458 We build it if we successfully read all .eh_frame input sections
459 and recognize them. */
461 struct eh_frame_array_ent
*array
;
464 struct compact_eh_frame_hdr_info
466 unsigned int allocated_entries
;
467 /* eh_frame_entry fragments. */
471 struct eh_frame_hdr_info
474 unsigned int array_count
;
475 bfd_boolean frame_hdr_is_compact
;
478 struct dwarf_eh_frame_hdr_info dwarf
;
479 struct compact_eh_frame_hdr_info compact
;
484 /* Enum used to identify target specific extensions to the elf_obj_tdata
485 and elf_link_hash_table structures. Note the enums deliberately start
486 from 1 so that we can detect an uninitialized field. The generic value
487 is last so that additions to this enum do not need to modify more than
491 AARCH64_ELF_DATA
= 1,
531 struct elf_sym_strtab
533 Elf_Internal_Sym sym
;
534 unsigned long dest_index
;
535 unsigned long destshndx_index
;
538 struct bfd_link_needed_list
540 struct bfd_link_needed_list
*next
;
548 is_solaris
, /* Solaris. */
549 is_vxworks
, /* VxWorks. */
550 is_nacl
/* Native Client. */
553 /* Used by bfd_sym_from_r_symndx to cache a small number of local
555 #define LOCAL_SYM_CACHE_SIZE 32
559 unsigned long indx
[LOCAL_SYM_CACHE_SIZE
];
560 Elf_Internal_Sym sym
[LOCAL_SYM_CACHE_SIZE
];
563 /* ELF linker hash table. */
565 struct elf_link_hash_table
567 struct bfd_link_hash_table root
;
569 /* An identifier used to distinguish different target
570 specific extensions to this structure. */
571 enum elf_target_id hash_table_id
;
573 /* Whether we have created the special dynamic sections required
574 when linking against or generating a shared object. */
575 bfd_boolean dynamic_sections_created
;
577 /* Whether dynamic relocations are present. */
578 bfd_boolean dynamic_relocs
;
580 /* True if this target has relocatable executables, so needs dynamic
582 bfd_boolean is_relocatable_executable
;
584 /* TRUE if there are IFUNC resolvers. */
585 bfd_boolean ifunc_resolvers
;
587 /* TRUE if DT_PLTGOT is a required dynamic tag. */
588 bfd_boolean dt_pltgot_required
;
590 /* TRUE if DT_JMPREL is a required dynamic tag. */
591 bfd_boolean dt_jmprel_required
;
593 /* The BFD used to hold special sections created by the linker.
594 This will be the first BFD found which requires these sections to
598 /* The value to use when initialising got.refcount/offset and
599 plt.refcount/offset in an elf_link_hash_entry. Set to zero when
600 the values are refcounts. Set to init_got_offset/init_plt_offset
601 in size_dynamic_sections when the values may be offsets. */
602 union gotplt_union init_got_refcount
;
603 union gotplt_union init_plt_refcount
;
605 /* The value to use for got.refcount/offset and plt.refcount/offset
606 when the values may be offsets. Normally (bfd_vma) -1. */
607 union gotplt_union init_got_offset
;
608 union gotplt_union init_plt_offset
;
610 /* The number of symbols found in the link which is intended for the
611 mandatory DT_SYMTAB tag (.dynsym section) in .dynamic section. */
612 bfd_size_type dynsymcount
;
613 bfd_size_type local_dynsymcount
;
615 /* The string table of dynamic symbols, which becomes the .dynstr
617 struct elf_strtab_hash
*dynstr
;
619 /* The number of symbol strings found in the link which must be put
620 into the .strtab section. */
621 bfd_size_type strtabcount
;
623 /* The array size of the symbol string table, which becomes the
625 bfd_size_type strtabsize
;
627 /* The array of strings, which becomes the .strtab section. */
628 struct elf_sym_strtab
*strtab
;
630 /* The number of buckets in the hash table in the .hash section.
631 This is based on the number of dynamic symbols. */
632 bfd_size_type bucketcount
;
634 /* A linked list of DT_NEEDED names found in dynamic objects
635 included in the link. */
636 struct bfd_link_needed_list
*needed
;
638 /* Sections in the output bfd that provides a section symbol
639 to be used by relocations emitted against local symbols.
640 Most targets will not use data_index_section. */
641 asection
*text_index_section
;
642 asection
*data_index_section
;
644 /* The _GLOBAL_OFFSET_TABLE_ symbol. */
645 struct elf_link_hash_entry
*hgot
;
647 /* The _PROCEDURE_LINKAGE_TABLE_ symbol. */
648 struct elf_link_hash_entry
*hplt
;
650 /* The _DYNAMIC symbol. */
651 struct elf_link_hash_entry
*hdynamic
;
653 /* A pointer to information used to merge SEC_MERGE sections. */
656 /* Used to link stabs in sections. */
657 struct stab_info stab_info
;
659 /* Used by eh_frame code when editing .eh_frame. */
660 struct eh_frame_hdr_info eh_info
;
662 /* A linked list of local symbols to be added to .dynsym. */
663 struct elf_link_local_dynamic_entry
*dynlocal
;
665 /* A linked list of DT_RPATH/DT_RUNPATH names found in dynamic
666 objects included in the link. */
667 struct bfd_link_needed_list
*runpath
;
669 /* Cached first output tls section and size of PT_TLS segment. */
671 bfd_size_type tls_size
; /* Bytes. */
673 /* The offset into splt of the PLT entry for the TLS descriptor
674 resolver. Special values are 0, if not necessary (or not found
675 to be necessary yet), and -1 if needed but not determined
679 /* The GOT offset for the lazy trampoline. Communicated to the
680 loader via DT_TLSDESC_GOT. The magic value (bfd_vma) -1
681 indicates an offset is not allocated. */
684 /* Target OS for linker output. */
685 enum elf_target_os target_os
;
687 /* A linked list of dynamic BFD's loaded in the link. */
688 struct elf_link_loaded_list
*dyn_loaded
;
690 /* Small local sym cache. */
691 struct sym_cache sym_cache
;
693 /* Short-cuts to get to dynamic linker sections. */
702 asection
*sreldynrelro
;
710 /* Look up an entry in an ELF linker hash table. */
712 #define elf_link_hash_lookup(table, string, create, copy, follow) \
713 ((struct elf_link_hash_entry *) \
714 bfd_link_hash_lookup (&(table)->root, (string), (create), \
717 /* Traverse an ELF linker hash table. */
719 #define elf_link_hash_traverse(table, func, info) \
720 (bfd_link_hash_traverse \
722 (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func), \
725 /* Get the ELF linker hash table from a link_info structure. */
727 #define elf_hash_table(p) ((struct elf_link_hash_table *) ((p)->hash))
729 #define elf_hash_table_id(table) ((table) -> hash_table_id)
731 /* Returns TRUE if the hash table is a struct elf_link_hash_table. */
732 #define is_elf_hash_table(htab) \
733 (((struct bfd_link_hash_table *) (htab))->type == bfd_link_elf_hash_table)
735 /* Constant information held for an ELF backend. */
737 struct elf_size_info
{
738 unsigned char sizeof_ehdr
, sizeof_phdr
, sizeof_shdr
;
739 unsigned char sizeof_rel
, sizeof_rela
, sizeof_sym
, sizeof_dyn
, sizeof_note
;
741 /* The size of entries in the .hash section. */
742 unsigned char sizeof_hash_entry
;
744 /* The number of internal relocations to allocate per external
746 unsigned char int_rels_per_ext_rel
;
747 /* We use some fixed size arrays. This should be large enough to
748 handle all back-ends. */
749 #define MAX_INT_RELS_PER_EXT_REL 3
751 unsigned char arch_size
, log_file_align
;
752 unsigned char elfclass
, ev_current
;
753 int (*write_out_phdrs
)
754 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
756 (*write_shdrs_and_ehdr
) (bfd
*);
757 bfd_boolean (*checksum_contents
)
758 (bfd
* , void (*) (const void *, size_t, void *), void *);
760 (bfd
*, asection
*, void *);
761 bfd_boolean (*swap_symbol_in
)
762 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
763 void (*swap_symbol_out
)
764 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
765 bfd_boolean (*slurp_reloc_table
)
766 (bfd
*, asection
*, asymbol
**, bfd_boolean
);
767 long (*slurp_symbol_table
)
768 (bfd
*, asymbol
**, bfd_boolean
);
770 (bfd
*, const void *, Elf_Internal_Dyn
*);
772 (bfd
*, const Elf_Internal_Dyn
*, void *);
774 /* This function is called to swap in a REL relocation. If an
775 external relocation corresponds to more than one internal
776 relocation, then all relocations are swapped in at once. */
777 void (*swap_reloc_in
)
778 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
780 /* This function is called to swap out a REL relocation. */
781 void (*swap_reloc_out
)
782 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
784 /* This function is called to swap in a RELA relocation. If an
785 external relocation corresponds to more than one internal
786 relocation, then all relocations are swapped in at once. */
787 void (*swap_reloca_in
)
788 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
790 /* This function is called to swap out a RELA relocation. */
791 void (*swap_reloca_out
)
792 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
795 #define elf_symbol_from(S) \
796 ((((S)->flags & BSF_SYNTHETIC) == 0 \
797 && (S)->the_bfd != NULL \
798 && (S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \
799 && (S)->the_bfd->tdata.elf_obj_data != 0) \
800 ? (elf_symbol_type *) (S) \
803 enum elf_reloc_type_class
{
805 reloc_class_relative
,
811 struct elf_reloc_cookie
813 Elf_Internal_Rela
*rels
, *rel
, *relend
;
814 Elf_Internal_Sym
*locsyms
;
818 struct elf_link_hash_entry
**sym_hashes
;
820 bfd_boolean bad_symtab
;
823 /* The level of IRIX compatibility we're striving for. */
831 /* Mapping of ELF section names and types. */
832 struct bfd_elf_special_section
835 unsigned int prefix_length
;
836 /* 0 means name must match PREFIX exactly.
837 -1 means name must start with PREFIX followed by an arbitrary string.
838 -2 means name must match PREFIX exactly or consist of PREFIX followed
839 by a dot then anything.
840 > 0 means name must start with the first PREFIX_LENGTH chars of
841 PREFIX and finish with the last SUFFIX_LENGTH chars of PREFIX. */
842 signed int suffix_length
;
847 enum action_discarded
853 typedef asection
* (*elf_gc_mark_hook_fn
)
854 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
855 struct elf_link_hash_entry
*, Elf_Internal_Sym
*);
857 enum elf_property_kind
859 /* A new property. */
860 property_unknown
= 0,
861 /* A property ignored by backend. */
863 /* A corrupt property reported by backend. */
865 /* A property should be removed due to property merge. */
867 /* A property which is a number. */
871 typedef struct elf_property
873 unsigned int pr_type
;
874 unsigned int pr_datasz
;
877 /* For property_number, this is a number. */
879 /* Add a new one if elf_property_kind is updated. */
881 enum elf_property_kind pr_kind
;
884 typedef struct elf_property_list
886 struct elf_property_list
*next
;
887 struct elf_property property
;
890 struct bfd_elf_section_reloc_data
;
892 struct elf_backend_data
894 /* The architecture for this backend. */
895 enum bfd_architecture arch
;
897 /* An identifier used to distinguish different target specific
898 extensions to elf_obj_tdata and elf_link_hash_table structures. */
899 enum elf_target_id target_id
;
902 enum elf_target_os target_os
;
904 /* The ELF machine code (EM_xxxx) for this backend. */
905 int elf_machine_code
;
910 /* The maximum page size for this backend. */
913 /* The minimum page size for this backend. An input object will not be
914 considered page aligned unless its sections are correctly aligned for
915 pages at least this large. May be smaller than maxpagesize. */
918 /* The common page size for this backend. */
919 bfd_vma commonpagesize
;
921 /* The value of commonpagesize to use when -z relro for this backend. */
922 bfd_vma relropagesize
;
924 /* The BFD flags applied to sections created for dynamic linking. */
925 flagword dynamic_sec_flags
;
927 /* Architecture-specific data for this backend.
928 This is actually a pointer to some type like struct elf_ARCH_data. */
929 const void *arch_data
;
931 /* A function to translate an ELF RELA relocation to a BFD arelent
932 structure. Returns TRUE upon success, FALSE otherwise. */
933 bfd_boolean (*elf_info_to_howto
)
934 (bfd
*, arelent
*, Elf_Internal_Rela
*);
936 /* A function to translate an ELF REL relocation to a BFD arelent
937 structure. Returns TRUE upon success, FALSE otherwise. */
938 bfd_boolean (*elf_info_to_howto_rel
)
939 (bfd
*, arelent
*, Elf_Internal_Rela
*);
941 /* A function to determine whether a symbol is global when
942 partitioning the symbol table into local and global symbols.
943 This should be NULL for most targets, in which case the correct
944 thing will be done. MIPS ELF, at least on the Irix 5, has
945 special requirements. */
946 bfd_boolean (*elf_backend_sym_is_global
)
949 /* The remaining functions are hooks which are called only if they
952 /* A function to permit a backend specific check on whether a
953 particular BFD format is relevant for an object file, and to
954 permit the backend to set any global information it wishes. When
955 this is called elf_elfheader is set, but anything else should be
956 used with caution. If this returns FALSE, the check_format
957 routine will return a bfd_error_wrong_format error. */
958 bfd_boolean (*elf_backend_object_p
)
961 /* A function to do additional symbol processing when reading the
962 ELF symbol table. This is where any processor-specific special
963 section indices are handled. */
964 void (*elf_backend_symbol_processing
)
967 /* A function to do additional symbol processing after reading the
968 entire ELF symbol table. */
969 bfd_boolean (*elf_backend_symbol_table_processing
)
970 (bfd
*, elf_symbol_type
*, unsigned int);
972 /* A function to set the type of the info field. Processor-specific
973 types should be handled here. */
974 int (*elf_backend_get_symbol_type
)
975 (Elf_Internal_Sym
*, int);
977 /* A function to return the linker hash table entry of a symbol that
978 might be satisfied by an archive symbol. */
979 struct elf_link_hash_entry
* (*elf_backend_archive_symbol_lookup
)
980 (bfd
*, struct bfd_link_info
*, const char *);
982 /* Return true if local section symbols should have a non-null st_name.
983 NULL implies false. */
984 bfd_boolean (*elf_backend_name_local_section_symbols
)
987 /* A function to do additional processing on the ELF section header
988 just before writing it out. This is used to set the flags and
989 type fields for some sections, or to actually write out data for
991 bfd_boolean (*elf_backend_section_processing
)
992 (bfd
*, Elf_Internal_Shdr
*);
994 /* A function to handle unusual section types when creating BFD
995 sections from ELF sections. */
996 bfd_boolean (*elf_backend_section_from_shdr
)
997 (bfd
*, Elf_Internal_Shdr
*, const char *, int);
999 /* A function to convert machine dependent ELF section header flags to
1000 BFD internal section header flags. */
1001 bfd_boolean (*elf_backend_section_flags
)
1002 (const Elf_Internal_Shdr
*);
1004 /* A function that returns a struct containing ELF section flags and
1005 type for the given BFD section. */
1006 const struct bfd_elf_special_section
* (*get_sec_type_attr
)
1007 (bfd
*, asection
*);
1009 /* A function to handle unusual program segment types when creating BFD
1010 sections from ELF program segments. */
1011 bfd_boolean (*elf_backend_section_from_phdr
)
1012 (bfd
*, Elf_Internal_Phdr
*, int, const char *);
1014 /* A function to set up the ELF section header for a BFD section in
1015 preparation for writing it out. This is where the flags and type
1016 fields are set for unusual sections. */
1017 bfd_boolean (*elf_backend_fake_sections
)
1018 (bfd
*, Elf_Internal_Shdr
*, asection
*);
1020 /* A function to get the ELF section index for a BFD section. If
1021 this returns TRUE, the section was found. If it is a normal ELF
1022 section, *RETVAL should be left unchanged. If it is not a normal
1023 ELF section *RETVAL should be set to the SHN_xxxx index. */
1024 bfd_boolean (*elf_backend_section_from_bfd_section
)
1025 (bfd
*, asection
*, int *retval
);
1027 /* If this field is not NULL, it is called by the add_symbols phase
1028 of a link just before adding a symbol to the global linker hash
1029 table. It may modify any of the fields as it wishes. If *NAME
1030 is set to NULL, the symbol will be skipped rather than being
1031 added to the hash table. This function is responsible for
1032 handling all processor dependent symbol bindings and section
1033 indices, and must set at least *FLAGS and *SEC for each processor
1034 dependent case; failure to do so will cause a link error. */
1035 bfd_boolean (*elf_add_symbol_hook
)
1036 (bfd
*abfd
, struct bfd_link_info
*info
, Elf_Internal_Sym
*,
1037 const char **name
, flagword
*flags
, asection
**sec
, bfd_vma
*value
);
1039 /* If this field is not NULL, it is called by the elf_link_output_sym
1040 phase of a link for each symbol which will appear in the object file.
1041 On error, this function returns 0. 1 is returned when the symbol
1042 should be output, 2 is returned when the symbol should be discarded. */
1043 int (*elf_backend_link_output_symbol_hook
)
1044 (struct bfd_link_info
*info
, const char *, Elf_Internal_Sym
*,
1045 asection
*, struct elf_link_hash_entry
*);
1047 /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend
1048 linker the first time it encounters a dynamic object in the link.
1049 This function must create any sections required for dynamic
1050 linking. The ABFD argument is a dynamic object. The .interp,
1051 .dynamic, .dynsym, .dynstr, and .hash functions have already been
1052 created, and this function may modify the section flags if
1053 desired. This function will normally create the .got and .plt
1054 sections, but different backends have different requirements. */
1055 bfd_boolean (*elf_backend_create_dynamic_sections
)
1056 (bfd
*abfd
, struct bfd_link_info
*info
);
1058 /* When creating a shared library, determine whether to omit the
1059 dynamic symbol for the section. */
1060 bfd_boolean (*elf_backend_omit_section_dynsym
)
1061 (bfd
*output_bfd
, struct bfd_link_info
*info
, asection
*osec
);
1063 /* Return TRUE if relocations of targets are compatible to the extent
1064 that CHECK_RELOCS will properly process them. PR 4424. */
1065 bfd_boolean (*relocs_compatible
) (const bfd_target
*, const bfd_target
*);
1067 /* The CHECK_RELOCS function is called by the add_symbols phase of
1068 the ELF backend linker. It is called once for each section with
1069 relocs of an object file, just after the symbols for the object
1070 file have been added to the global linker hash table. The
1071 function must look through the relocs and do any special handling
1072 required. This generally means allocating space in the global
1073 offset table, and perhaps allocating space for a reloc. The
1074 relocs are always passed as Rela structures; if the section
1075 actually uses Rel structures, the r_addend field will always be
1077 bfd_boolean (*check_relocs
)
1078 (bfd
*abfd
, struct bfd_link_info
*info
, asection
*o
,
1079 const Elf_Internal_Rela
*relocs
);
1081 /* The CHECK_DIRECTIVES function is called once per input file by
1082 the add_symbols phase of the ELF backend linker. The function
1083 must inspect the bfd and create any additional symbols according
1084 to any custom directives in the bfd. */
1085 bfd_boolean (*check_directives
)
1086 (bfd
*abfd
, struct bfd_link_info
*info
);
1088 /* The NOTICE_AS_NEEDED function is called as the linker is about to
1089 handle an as-needed lib (ACT = notice_as_needed), and after the
1090 linker has decided to keep the lib (ACT = notice_needed) or when
1091 the lib is not needed (ACT = notice_not_needed). */
1092 bfd_boolean (*notice_as_needed
)
1093 (bfd
*abfd
, struct bfd_link_info
*info
, enum notice_asneeded_action act
);
1095 /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
1096 linker for every symbol which is defined by a dynamic object and
1097 referenced by a regular object. This is called after all the
1098 input files have been seen, but before the SIZE_DYNAMIC_SECTIONS
1099 function has been called. The hash table entry should be
1100 bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be
1101 defined in a section from a dynamic object. Dynamic object
1102 sections are not included in the final link, and this function is
1103 responsible for changing the value to something which the rest of
1104 the link can deal with. This will normally involve adding an
1105 entry to the .plt or .got or some such section, and setting the
1106 symbol to point to that. */
1107 bfd_boolean (*elf_backend_adjust_dynamic_symbol
)
1108 (struct bfd_link_info
*info
, struct elf_link_hash_entry
*h
);
1110 /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker
1111 after all the linker input files have been seen but before the
1112 section sizes have been set. This is called after
1113 ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS. */
1114 bfd_boolean (*elf_backend_always_size_sections
)
1115 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1117 /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend
1118 linker after all the linker input files have been seen but before
1119 the sections sizes have been set. This is called after
1120 ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols.
1121 It is only called when linking against a dynamic object. It must
1122 set the sizes of the dynamic sections, and may fill in their
1123 contents as well. The generic ELF linker can handle the .dynsym,
1124 .dynstr and .hash sections. This function must handle the
1125 .interp section and any sections created by the
1126 CREATE_DYNAMIC_SECTIONS entry point. */
1127 bfd_boolean (*elf_backend_size_dynamic_sections
)
1128 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1130 /* The STRIP_ZERO_SIZED_DYNAMIC_SECTIONS function is called by the
1131 ELF backend linker to strip zero-sized dynamic sections after
1132 the section sizes have been set. */
1133 bfd_boolean (*elf_backend_strip_zero_sized_dynamic_sections
)
1134 (struct bfd_link_info
*info
);
1136 /* Set TEXT_INDEX_SECTION and DATA_INDEX_SECTION, the output sections
1137 we keep to use as a base for relocs and symbols. */
1138 void (*elf_backend_init_index_section
)
1139 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1141 /* The RELOCATE_SECTION function is called by the ELF backend linker
1142 to handle the relocations for a section.
1144 The relocs are always passed as Rela structures; if the section
1145 actually uses Rel structures, the r_addend field will always be
1148 This function is responsible for adjust the section contents as
1149 necessary, and (if using Rela relocs and generating a
1150 relocatable output file) adjusting the reloc addend as
1153 This function does not have to worry about setting the reloc
1154 address or the reloc symbol index.
1156 LOCAL_SYMS is a pointer to the swapped in local symbols.
1158 LOCAL_SECTIONS is an array giving the section in the input file
1159 corresponding to the st_shndx field of each local symbol.
1161 The global hash table entry for the global symbols can be found
1162 via elf_sym_hashes (input_bfd).
1164 When generating relocatable output, this function must handle
1165 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
1166 going to be the section symbol corresponding to the output
1167 section, which means that the addend must be adjusted
1170 Returns FALSE on error, TRUE on success, 2 if successful and
1171 relocations should be written for this section. */
1172 int (*elf_backend_relocate_section
)
1173 (bfd
*output_bfd
, struct bfd_link_info
*info
, bfd
*input_bfd
,
1174 asection
*input_section
, bfd_byte
*contents
, Elf_Internal_Rela
*relocs
,
1175 Elf_Internal_Sym
*local_syms
, asection
**local_sections
);
1177 /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend
1178 linker just before it writes a symbol out to the .dynsym section.
1179 The processor backend may make any required adjustment to the
1180 symbol. It may also take the opportunity to set contents of the
1181 dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on
1182 all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called
1183 on those symbols which are defined by a dynamic object. */
1184 bfd_boolean (*elf_backend_finish_dynamic_symbol
)
1185 (bfd
*output_bfd
, struct bfd_link_info
*info
,
1186 struct elf_link_hash_entry
*h
, Elf_Internal_Sym
*sym
);
1188 /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend
1189 linker just before it writes all the dynamic sections out to the
1190 output file. The FINISH_DYNAMIC_SYMBOL will have been called on
1191 all dynamic symbols. */
1192 bfd_boolean (*elf_backend_finish_dynamic_sections
)
1193 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1195 /* A function to do any beginning processing needed for the ELF file
1196 before building the ELF headers and computing file positions. */
1197 void (*elf_backend_begin_write_processing
)
1198 (bfd
*, struct bfd_link_info
*);
1200 /* A function to do any final processing needed for the ELF file
1201 before writing it out. */
1202 bfd_boolean (*elf_backend_final_write_processing
)
1205 /* This function is called by get_program_header_size. It should
1206 return the number of additional program segments which this BFD
1207 will need. It should return -1 on error. */
1208 int (*elf_backend_additional_program_headers
)
1209 (bfd
*, struct bfd_link_info
*);
1211 /* This function is called to modify an existing segment map in a
1212 backend specific fashion. */
1213 bfd_boolean (*elf_backend_modify_segment_map
)
1214 (bfd
*, struct bfd_link_info
*);
1216 /* This function is called to modify program headers just before
1217 they are written. */
1218 bfd_boolean (*elf_backend_modify_headers
)
1219 (bfd
*, struct bfd_link_info
*);
1221 /* This function is called to see if the PHDR header should be
1222 checked for validity. */
1223 bfd_boolean (*elf_backend_allow_non_load_phdr
)
1224 (bfd
*, const Elf_Internal_Phdr
*, unsigned);
1226 /* This function is called before section garbage collection to
1227 mark entry symbol sections. */
1229 (struct bfd_link_info
*);
1231 /* This function is called during section garbage collection to
1232 mark sections that define global symbols. */
1233 bfd_boolean (*gc_mark_dynamic_ref
)
1234 (struct elf_link_hash_entry
*, void *);
1236 /* This function is called during section gc to discover the section a
1237 particular relocation refers to. */
1238 elf_gc_mark_hook_fn gc_mark_hook
;
1240 /* This function, if defined, is called after the first gc marking pass
1241 to allow the backend to mark additional sections. */
1242 bfd_boolean (*gc_mark_extra_sections
)
1243 (struct bfd_link_info
*, elf_gc_mark_hook_fn
);
1245 /* This function is called to initialise ELF file header info.
1246 Customised versions can modify things like the OS and ABI version. */
1247 bfd_boolean (*elf_backend_init_file_header
)
1248 (bfd
*, struct bfd_link_info
*);
1250 /* This function, if defined, prints a symbol to file and returns the
1251 name of the symbol to be printed. It should return NULL to fall
1252 back to default symbol printing. */
1253 const char *(*elf_backend_print_symbol_all
)
1254 (bfd
*, void *, asymbol
*);
1256 /* This function, if defined, is called after all local symbols and
1257 global symbols converted to locals are emitted into the symtab
1258 section. It allows the backend to emit special local symbols
1259 not handled in the hash table. */
1260 bfd_boolean (*elf_backend_output_arch_local_syms
)
1261 (bfd
*, struct bfd_link_info
*, void *,
1262 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym
*, asection
*,
1263 struct elf_link_hash_entry
*));
1265 /* This function, if defined, is called after all symbols are emitted
1266 into the symtab section. It allows the backend to emit special
1267 global symbols not handled in the hash table. */
1268 bfd_boolean (*elf_backend_output_arch_syms
)
1269 (bfd
*, struct bfd_link_info
*, void *,
1270 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym
*, asection
*,
1271 struct elf_link_hash_entry
*));
1273 /* Filter what symbols of the output file to include in the import
1274 library if one is created. */
1275 unsigned int (*elf_backend_filter_implib_symbols
)
1276 (bfd
*, struct bfd_link_info
*, asymbol
**, long);
1278 /* Copy any information related to dynamic linking from a pre-existing
1279 symbol to a newly created symbol. Also called to copy flags and
1280 other back-end info to a weakdef, in which case the symbol is not
1281 newly created and plt/got refcounts and dynamic indices should not
1283 void (*elf_backend_copy_indirect_symbol
)
1284 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
1285 struct elf_link_hash_entry
*);
1287 /* Modify any information related to dynamic linking such that the
1288 symbol is not exported. */
1289 void (*elf_backend_hide_symbol
)
1290 (struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd_boolean
);
1292 /* A function to do additional symbol fixup, called by
1293 _bfd_elf_fix_symbol_flags. */
1294 bfd_boolean (*elf_backend_fixup_symbol
)
1295 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
1297 /* Merge the backend specific symbol attribute. */
1298 void (*elf_backend_merge_symbol_attribute
)
1299 (struct elf_link_hash_entry
*, unsigned int, bfd_boolean
, bfd_boolean
);
1301 /* This function, if defined, will return a string containing the
1302 name of a target-specific dynamic tag. */
1303 char *(*elf_backend_get_target_dtag
)
1306 /* Decide whether an undefined symbol is special and can be ignored.
1307 This is the case for OPTIONAL symbols on IRIX. */
1308 bfd_boolean (*elf_backend_ignore_undef_symbol
)
1309 (struct elf_link_hash_entry
*);
1311 /* Emit relocations. Overrides default routine for emitting relocs,
1312 except during a relocatable link, or if all relocs are being emitted. */
1313 bfd_boolean (*elf_backend_emit_relocs
)
1314 (bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*,
1315 struct elf_link_hash_entry
**);
1317 /* Update relocations. It is allowed to change the number and the order.
1318 In such a case hashes should be invalidated. */
1319 void (*elf_backend_update_relocs
)
1320 (asection
*, struct bfd_elf_section_reloc_data
*);
1322 /* Count relocations. Not called for relocatable links
1323 or if all relocs are being preserved in the output. */
1324 unsigned int (*elf_backend_count_relocs
)
1325 (struct bfd_link_info
*, asection
*);
1327 /* Count additionals relocations. Called for relocatable links if
1328 additional relocations needs to be created. */
1329 unsigned int (*elf_backend_count_additional_relocs
)
1332 /* Say whether to sort relocs output by ld -r and ld --emit-relocs,
1333 by r_offset. If NULL, default to true. */
1334 bfd_boolean (*sort_relocs_p
)
1337 /* This function, if defined, is called when an NT_PRSTATUS note is found
1339 bfd_boolean (*elf_backend_grok_prstatus
)
1340 (bfd
*, Elf_Internal_Note
*);
1342 /* This function, if defined, is called when an NT_PSINFO or NT_PRPSINFO
1343 note is found in a core file. */
1344 bfd_boolean (*elf_backend_grok_psinfo
)
1345 (bfd
*, Elf_Internal_Note
*);
1347 /* This function, if defined, is called when a "FreeBSD" NT_PRSTATUS
1348 note is found in a core file. */
1349 bfd_boolean (*elf_backend_grok_freebsd_prstatus
)
1350 (bfd
*, Elf_Internal_Note
*);
1352 /* This function, if defined, is called to write a note to a corefile. */
1353 char *(*elf_backend_write_core_note
)
1354 (bfd
*abfd
, char *buf
, int *bufsiz
, int note_type
, ...);
1356 /* This function, if defined, is called to convert target-specific
1357 section flag names into hex values. */
1358 flagword (*elf_backend_lookup_section_flags_hook
)
1361 /* This function returns class of a reloc type. */
1362 enum elf_reloc_type_class (*elf_backend_reloc_type_class
)
1363 (const struct bfd_link_info
*, const asection
*, const Elf_Internal_Rela
*);
1365 /* This function, if defined, removes information about discarded functions
1366 from other sections which mention them. */
1367 bfd_boolean (*elf_backend_discard_info
)
1368 (bfd
*, struct elf_reloc_cookie
*, struct bfd_link_info
*);
1370 /* This function, if defined, signals that the function above has removed
1371 the discarded relocations for this section. */
1372 bfd_boolean (*elf_backend_ignore_discarded_relocs
)
1375 /* What to do when ld finds relocations against symbols defined in
1376 discarded sections. */
1377 unsigned int (*action_discarded
)
1380 /* This function returns the width of FDE pointers in bytes, or 0 if
1381 that can't be determined for some reason. The default definition
1382 goes by the bfd's EI_CLASS. */
1383 unsigned int (*elf_backend_eh_frame_address_size
)
1384 (bfd
*, const asection
*);
1386 /* These functions tell elf-eh-frame whether to attempt to turn
1387 absolute or lsda encodings into pc-relative ones. The default
1388 definition enables these transformations. */
1389 bfd_boolean (*elf_backend_can_make_relative_eh_frame
)
1390 (bfd
*, struct bfd_link_info
*, asection
*);
1391 bfd_boolean (*elf_backend_can_make_lsda_relative_eh_frame
)
1392 (bfd
*, struct bfd_link_info
*, asection
*);
1394 /* This function returns an encoding after computing the encoded
1395 value (and storing it in ENCODED) for the given OFFSET into OSEC,
1396 to be stored in at LOC_OFFSET into the LOC_SEC input section.
1397 The default definition chooses a 32-bit PC-relative encoding. */
1398 bfd_byte (*elf_backend_encode_eh_address
)
1399 (bfd
*abfd
, struct bfd_link_info
*info
,
1400 asection
*osec
, bfd_vma offset
,
1401 asection
*loc_sec
, bfd_vma loc_offset
,
1404 /* This function, if defined, may write out the given section.
1405 Returns TRUE if it did so and FALSE if the caller should. */
1406 bfd_boolean (*elf_backend_write_section
)
1407 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
1409 /* This function, if defined, returns TRUE if it is section symbols
1410 only that are considered local for the purpose of partitioning the
1411 symbol table into local and global symbols. This should be NULL
1412 for most targets, in which case the correct thing will be done.
1413 MIPS ELF, at least on the Irix 5, has special requirements. */
1414 bfd_boolean (*elf_backend_elfsym_local_is_section
)
1417 /* The level of IRIX compatibility we're striving for.
1418 MIPS ELF specific function. */
1419 irix_compat_t (*elf_backend_mips_irix_compat
)
1422 reloc_howto_type
*(*elf_backend_mips_rtype_to_howto
)
1423 (bfd
*, unsigned int, bfd_boolean
);
1425 /* The swapping table to use when dealing with ECOFF information.
1426 Used for the MIPS ELF .mdebug section. */
1427 const struct ecoff_debug_swap
*elf_backend_ecoff_debug_swap
;
1429 /* This function implements `bfd_elf_bfd_from_remote_memory';
1430 see elf.c, elfcode.h. */
1431 bfd
*(*elf_backend_bfd_from_remote_memory
)
1432 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
1433 int (*target_read_memory
) (bfd_vma vma
, bfd_byte
*myaddr
,
1434 bfd_size_type len
));
1436 bfd_boolean (*elf_backend_core_find_build_id
) (bfd
*, bfd_vma
);
1438 /* This function is used by `_bfd_elf_get_synthetic_symtab';
1440 bfd_vma (*plt_sym_val
) (bfd_vma
, const asection
*, const arelent
*);
1442 /* Is symbol defined in common section? */
1443 bfd_boolean (*common_definition
) (Elf_Internal_Sym
*);
1445 /* Return a common section index for section. */
1446 unsigned int (*common_section_index
) (asection
*);
1448 /* Return a common section for section. */
1449 asection
*(*common_section
) (asection
*);
1451 /* Return TRUE if we can merge 2 definitions. */
1452 bfd_boolean (*merge_symbol
) (struct elf_link_hash_entry
*,
1453 const Elf_Internal_Sym
*, asection
**,
1454 bfd_boolean
, bfd_boolean
,
1455 bfd
*, const asection
*);
1457 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
1458 bfd_boolean (*elf_hash_symbol
) (struct elf_link_hash_entry
*);
1460 /* If non-NULL, called to register the location of XLAT_LOC within
1461 .MIPS.xhash at which real final dynindx for H will be written.
1462 If XLAT_LOC is zero, the symbol is not included in
1463 .MIPS.xhash and no dynindx will be written. */
1464 void (*record_xhash_symbol
)
1465 (struct elf_link_hash_entry
*h
, bfd_vma xlat_loc
);
1467 /* Return TRUE if type is a function symbol type. */
1468 bfd_boolean (*is_function_type
) (unsigned int type
);
1470 /* If the ELF symbol SYM might be a function in SEC, return the
1471 function size and set *CODE_OFF to the function's entry point,
1472 otherwise return zero. */
1473 bfd_size_type (*maybe_function_sym
) (const asymbol
*sym
, asection
*sec
,
1476 /* Given NAME, the name of a relocation section stripped of its
1477 .rel/.rela prefix, return the section in ABFD to which the
1478 relocations apply. */
1479 asection
*(*get_reloc_section
) (bfd
*abfd
, const char *name
);
1481 /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
1482 has a type >= SHT_LOOS. Returns TRUE if the fields were initialised,
1483 FALSE otherwise. Can be called multiple times for a given section,
1484 until it returns TRUE. Most of the times it is called ISECTION will be
1485 set to an input section that might be associated with the output section.
1486 The last time that it is called, ISECTION will be set to NULL. */
1487 bfd_boolean (*elf_backend_copy_special_section_fields
)
1488 (const bfd
*ibfd
, bfd
*obfd
, const Elf_Internal_Shdr
*isection
,
1489 Elf_Internal_Shdr
*osection
);
1491 /* Used to handle bad SHF_LINK_ORDER input. */
1492 void (*link_order_error_handler
) (const char *, ...);
1494 /* Name of the PLT relocation section. */
1495 const char *relplt_name
;
1497 /* Alternate EM_xxxx machine codes for this backend. */
1498 int elf_machine_alt1
;
1499 int elf_machine_alt2
;
1501 const struct elf_size_info
*s
;
1503 /* An array of target specific special sections. */
1504 const struct bfd_elf_special_section
*special_sections
;
1506 /* The size in bytes of the header for the GOT. This includes the
1507 so-called reserved entries on some systems. */
1508 bfd_vma got_header_size
;
1510 /* The size of the GOT entry for the symbol pointed to by H if non-NULL,
1511 otherwise by the local symbol with index SYMNDX in IBFD. */
1512 bfd_vma (*got_elt_size
) (bfd
*, struct bfd_link_info
*,
1513 struct elf_link_hash_entry
*h
,
1514 bfd
*ibfd
, unsigned long symndx
);
1516 /* The vendor name to use for a processor-standard attributes section. */
1517 const char *obj_attrs_vendor
;
1519 /* The section name to use for a processor-standard attributes section. */
1520 const char *obj_attrs_section
;
1522 /* Return 1, 2 or 3 to indicate what type of arguments a
1523 processor-specific tag takes. */
1524 int (*obj_attrs_arg_type
) (int);
1526 /* The section type to use for an attributes section. */
1527 unsigned int obj_attrs_section_type
;
1529 /* This function determines the order in which any attributes are
1530 written. It must be defined for input in the range
1531 LEAST_KNOWN_OBJ_ATTRIBUTE..NUM_KNOWN_OBJ_ATTRIBUTES-1 (this range
1532 is used in order to make unity easy). The returned value is the
1533 actual tag number to place in the input position. */
1534 int (*obj_attrs_order
) (int);
1536 /* Handle merging unknown attributes; either warn and return TRUE,
1537 or give an error and return FALSE. */
1538 bfd_boolean (*obj_attrs_handle_unknown
) (bfd
*, int);
1540 /* Parse GNU properties. Return the property kind. If the property
1541 is corrupt, issue an error message and return property_corrupt. */
1542 enum elf_property_kind (*parse_gnu_properties
) (bfd
*, unsigned int,
1546 /* Merge GNU properties. Return TRUE if property is updated. */
1547 bfd_boolean (*merge_gnu_properties
) (struct bfd_link_info
*, bfd
*, bfd
*,
1548 elf_property
*, elf_property
*);
1550 /* Set up GNU properties. */
1551 bfd
*(*setup_gnu_properties
) (struct bfd_link_info
*);
1553 /* Fix up GNU properties. */
1554 void (*fixup_gnu_properties
) (struct bfd_link_info
*,
1555 elf_property_list
**);
1557 /* Encoding used for compact EH tables. */
1558 int (*compact_eh_encoding
) (struct bfd_link_info
*);
1560 /* Opcode representing no unwind. */
1561 int (*cant_unwind_opcode
) (struct bfd_link_info
*);
1563 /* Called when emitting an ELF symbol whoes input version had an
1564 ST_SHNDX field set to a value in the range SHN_LOPROC..SHN_HIOS.
1565 Returns the value to be installed in the ST_SHNDX field of the
1566 emitted symbol. If not defined, the value is left unchanged. */
1567 unsigned int (*symbol_section_index
) (bfd
*, elf_symbol_type
*);
1569 /* Called when a section has extra reloc sections. */
1570 bfd_boolean (*init_secondary_reloc_section
) (bfd
*, Elf_Internal_Shdr
*,
1571 const char *, unsigned int);
1573 /* Called when after loading the normal relocs for a section. */
1574 bfd_boolean (*slurp_secondary_relocs
) (bfd
*, asection
*, asymbol
**, bfd_boolean
);
1576 /* Called after writing the normal relocs for a section. */
1577 bfd_boolean (*write_secondary_relocs
) (bfd
*, asection
*);
1579 /* This is non-zero if static TLS segments require a special alignment. */
1580 unsigned static_tls_alignment
;
1582 /* Alignment for the PT_GNU_STACK segment. */
1583 unsigned stack_align
;
1585 /* Flag bits to assign to a section of type SHT_STRTAB. */
1586 unsigned long elf_strtab_flags
;
1588 /* This is TRUE if the linker should act like collect and gather
1589 global constructors and destructors by name. This is TRUE for
1590 MIPS ELF because the Irix 5 tools can not handle the .init
1592 unsigned collect
: 1;
1594 /* This is TRUE if the linker should ignore changes to the type of a
1595 symbol. This is TRUE for MIPS ELF because some Irix 5 objects
1596 record undefined functions as STT_OBJECT although the definitions
1598 unsigned type_change_ok
: 1;
1600 /* Whether the backend may use REL relocations. (Some backends use
1601 both REL and RELA relocations, and this flag is set for those
1603 unsigned may_use_rel_p
: 1;
1605 /* Whether the backend may use RELA relocations. (Some backends use
1606 both REL and RELA relocations, and this flag is set for those
1608 unsigned may_use_rela_p
: 1;
1610 /* Whether the default relocation type is RELA. If a backend with
1611 this flag set wants REL relocations for a particular section,
1612 it must note that explicitly. Similarly, if this flag is clear,
1613 and the backend wants RELA relocations for a particular
1615 unsigned default_use_rela_p
: 1;
1617 /* True if PLT and copy relocations should be RELA by default. */
1618 unsigned rela_plts_and_copies_p
: 1;
1620 /* Set if RELA relocations for a relocatable link can be handled by
1621 generic code. Backends that set this flag need do nothing in the
1622 backend relocate_section routine for relocatable linking. */
1623 unsigned rela_normal
: 1;
1625 /* Set if DT_REL/DT_RELA/DT_RELSZ/DT_RELASZ should not include PLT
1627 unsigned dtrel_excludes_plt
: 1;
1629 /* TRUE if addresses "naturally" sign extend. This is used when
1630 swapping in from Elf32 when BFD64. */
1631 unsigned sign_extend_vma
: 1;
1633 unsigned want_got_plt
: 1;
1634 unsigned plt_readonly
: 1;
1635 unsigned want_plt_sym
: 1;
1636 unsigned plt_not_loaded
: 1;
1637 unsigned plt_alignment
: 4;
1638 unsigned can_gc_sections
: 1;
1639 unsigned can_refcount
: 1;
1640 unsigned want_got_sym
: 1;
1641 unsigned want_dynbss
: 1;
1642 unsigned want_dynrelro
: 1;
1644 /* Targets which do not support physical addressing often require
1645 that the p_paddr field in the section header to be set to zero.
1646 This field indicates whether this behavior is required. */
1647 unsigned want_p_paddr_set_to_zero
: 1;
1649 /* Target has broken hardware and/or kernel that requires pages not
1650 to be mapped twice with different permissions. */
1651 unsigned no_page_alias
: 1;
1653 /* True if an object file lacking a .note.GNU-stack section
1654 should be assumed to be requesting exec stack. At least one
1655 other file in the link needs to have a .note.GNU-stack section
1656 for a PT_GNU_STACK segment to be created. */
1657 unsigned default_execstack
: 1;
1659 /* True if elf_section_data(sec)->this_hdr.contents is sec->rawsize
1660 in length rather than sec->size in length, if sec->rawsize is
1661 non-zero and smaller than sec->size. */
1662 unsigned caches_rawsize
: 1;
1664 /* Address of protected data defined in the shared library may be
1665 external, i.e., due to copy relocation. */
1666 unsigned extern_protected_data
: 1;
1668 /* True if `_bfd_elf_link_renumber_dynsyms' must be called even for
1670 unsigned always_renumber_dynsyms
: 1;
1672 /* True if the 32-bit Linux PRPSINFO structure's `pr_uid' and `pr_gid'
1673 members use a 16-bit data type. */
1674 unsigned linux_prpsinfo32_ugid16
: 1;
1676 /* True if the 64-bit Linux PRPSINFO structure's `pr_uid' and `pr_gid'
1677 members use a 16-bit data type. */
1678 unsigned linux_prpsinfo64_ugid16
: 1;
1681 /* Information about reloc sections associated with a bfd_elf_section_data
1683 struct bfd_elf_section_reloc_data
1685 /* The ELF header for the reloc section associated with this
1687 Elf_Internal_Shdr
*hdr
;
1688 /* The number of relocations currently assigned to HDR. */
1690 /* The ELF section number of the reloc section. Only used for an
1693 /* Used by the backend linker to store the symbol hash table entries
1694 associated with relocs against global symbols. */
1695 struct elf_link_hash_entry
**hashes
;
1698 /* Information stored for each BFD section in an ELF file. This
1699 structure is allocated by elf_new_section_hook. */
1701 struct bfd_elf_section_data
1703 /* The ELF header for this section. */
1704 Elf_Internal_Shdr this_hdr
;
1706 /* INPUT_SECTION_FLAGS if specified in the linker script. */
1707 struct flag_info
*section_flag_info
;
1709 /* Information about the REL and RELA reloc sections associated
1710 with this section, if any. */
1711 struct bfd_elf_section_reloc_data rel
, rela
;
1713 /* The ELF section number of this section. */
1716 /* Used by the backend linker when generating a shared library to
1717 record the dynamic symbol index for a section symbol
1718 corresponding to this section. A value of 0 means that there is
1719 no dynamic symbol for this section. */
1722 /* A pointer to the linked-to section for SHF_LINK_ORDER. */
1723 asection
*linked_to
;
1725 /* A pointer to the swapped relocs. If the section uses REL relocs,
1726 rather than RELA, all the r_addend fields will be zero. This
1727 pointer may be NULL. It is used by the backend linker. */
1728 Elf_Internal_Rela
*relocs
;
1730 /* A pointer to a linked list tracking dynamic relocs copied for
1734 /* A pointer to the bfd section used for dynamic relocs. */
1738 /* Group name, if this section is a member of a group. */
1741 /* Group signature sym, if this is the SHT_GROUP section. */
1742 struct bfd_symbol
*id
;
1745 /* For a member of a group, points to the SHT_GROUP section.
1746 NULL for the SHT_GROUP section itself and non-group sections. */
1747 asection
*sec_group
;
1749 /* A linked list of member sections in the group. Circular when used by
1750 the linker. For the SHT_GROUP section, points at first member. */
1751 asection
*next_in_group
;
1753 /* The FDEs associated with this section. The u.fde.next_in_section
1754 field acts as a chain pointer. */
1755 struct eh_cie_fde
*fde_list
;
1757 /* Link from a text section to its .eh_frame_entry section. */
1758 asection
*eh_frame_entry
;
1760 /* TRUE if the section has secondary reloc sections associated with it.
1761 FIXME: In the future it might be better to change this into a list
1762 of secondary reloc sections, making lookup easier and faster. */
1763 bfd_boolean has_secondary_relocs
;
1765 /* A pointer used for various section optimizations. */
1769 #define elf_section_data(sec) ((struct bfd_elf_section_data*)(sec)->used_by_bfd)
1770 #define elf_linked_to_section(sec) (elf_section_data(sec)->linked_to)
1771 #define elf_section_type(sec) (elf_section_data(sec)->this_hdr.sh_type)
1772 #define elf_section_flags(sec) (elf_section_data(sec)->this_hdr.sh_flags)
1773 #define elf_section_info(sec) (elf_section_data(sec)->this_hdr.sh_info)
1774 #define elf_group_name(sec) (elf_section_data(sec)->group.name)
1775 #define elf_group_id(sec) (elf_section_data(sec)->group.id)
1776 #define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group)
1777 #define elf_fde_list(sec) (elf_section_data(sec)->fde_list)
1778 #define elf_sec_group(sec) (elf_section_data(sec)->sec_group)
1779 #define elf_section_eh_frame_entry(sec) (elf_section_data(sec)->eh_frame_entry)
1781 #define xvec_get_elf_backend_data(xvec) \
1782 ((const struct elf_backend_data *) (xvec)->backend_data)
1784 #define get_elf_backend_data(abfd) \
1785 xvec_get_elf_backend_data ((abfd)->xvec)
1787 /* The least object attributes (within an attributes subsection) known
1788 for any target. Some code assumes that the value 0 is not used and
1789 the field for that attribute can instead be used as a marker to
1790 indicate that attributes have been initialized. */
1791 #define LEAST_KNOWN_OBJ_ATTRIBUTE 2
1793 /* The maximum number of known object attributes for any target. */
1794 #define NUM_KNOWN_OBJ_ATTRIBUTES 71
1796 /* The value of an object attribute. The type indicates whether the attribute
1797 holds and integer, a string, or both. It can also indicate that there can
1798 be no default (i.e. all values must be written to file, even zero), or
1799 that the value is in error and should not be written to file. */
1801 typedef struct obj_attribute
1803 #define ATTR_TYPE_FLAG_INT_VAL (1 << 0)
1804 #define ATTR_TYPE_FLAG_STR_VAL (1 << 1)
1805 #define ATTR_TYPE_FLAG_NO_DEFAULT (1 << 2)
1806 #define ATTR_TYPE_FLAG_ERROR (1 << 3)
1808 #define ATTR_TYPE_HAS_INT_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_INT_VAL)
1809 #define ATTR_TYPE_HAS_STR_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_STR_VAL)
1810 #define ATTR_TYPE_HAS_NO_DEFAULT(TYPE) ((TYPE) & ATTR_TYPE_FLAG_NO_DEFAULT)
1811 #define ATTR_TYPE_HAS_ERROR(TYPE) ((TYPE) & ATTR_TYPE_FLAG_ERROR)
1818 typedef struct obj_attribute_list
1820 struct obj_attribute_list
*next
;
1823 } obj_attribute_list
;
1825 /* Object attributes may either be defined by the processor ABI, index
1826 OBJ_ATTR_PROC in the *_obj_attributes arrays, or be GNU-specific
1827 (and possibly also processor-specific), index OBJ_ATTR_GNU. */
1828 #define OBJ_ATTR_PROC 0
1829 #define OBJ_ATTR_GNU 1
1830 #define OBJ_ATTR_FIRST OBJ_ATTR_PROC
1831 #define OBJ_ATTR_LAST OBJ_ATTR_GNU
1833 /* The following object attribute tags are taken as generic, for all
1834 targets and for "gnu" where there is no target standard. */
1841 Tag_compatibility
= 32
1844 /* The following struct stores information about every SystemTap section
1845 found in the object file. */
1848 struct sdt_note
*next
;
1853 /* tdata information grabbed from an elf core file. */
1854 struct core_elf_obj_tdata
1863 /* Extra tdata information held for output ELF BFDs. */
1864 struct output_elf_obj_tdata
1866 struct elf_segment_map
*seg_map
;
1867 struct elf_strtab_hash
*strtab_ptr
;
1869 /* STT_SECTION symbols for each section */
1870 asymbol
**section_syms
;
1872 /* Used to determine if PT_GNU_EH_FRAME segment header should be
1874 asection
*eh_frame_hdr
;
1876 /* NT_GNU_BUILD_ID note type info. */
1879 bfd_boolean (*after_write_object_contents
) (bfd
*);
1884 /* Records the result of `get_program_header_size'. */
1885 bfd_size_type program_header_size
;
1887 /* Used when laying out sections. */
1888 file_ptr next_file_pos
;
1890 /* Linker information. */
1891 struct bfd_link_info
*link_info
;
1893 int num_section_syms
;
1894 unsigned int shstrtab_section
, strtab_section
;
1896 /* Segment flags for the PT_GNU_STACK segment. */
1897 unsigned int stack_flags
;
1899 /* Used to determine if the e_flags field has been initialized */
1900 bfd_boolean flags_init
;
1903 /* Indicate if the bfd contains SHF_GNU_MBIND/SHF_GNU_RETAIN sections or
1904 symbols that have the STT_GNU_IFUNC symbol type or STB_GNU_UNIQUE
1905 binding. Used to set the osabi field in the ELF header structure. */
1908 elf_gnu_osabi_mbind
= 1 << 0,
1909 elf_gnu_osabi_ifunc
= 1 << 1,
1910 elf_gnu_osabi_unique
= 1 << 2,
1911 elf_gnu_osabi_retain
= 1 << 3,
1914 typedef struct elf_section_list
1916 Elf_Internal_Shdr hdr
;
1918 struct elf_section_list
* next
;
1921 enum dynamic_lib_link_class
{
1925 DYN_NO_ADD_NEEDED
= 4,
1929 /* Some private data is stashed away for future use using the tdata pointer
1930 in the bfd structure. */
1932 struct elf_obj_tdata
1934 Elf_Internal_Ehdr elf_header
[1]; /* Actual data, but ref like ptr */
1935 Elf_Internal_Shdr
**elf_sect_ptr
;
1936 Elf_Internal_Phdr
*phdr
;
1937 Elf_Internal_Shdr symtab_hdr
;
1938 Elf_Internal_Shdr shstrtab_hdr
;
1939 Elf_Internal_Shdr strtab_hdr
;
1940 Elf_Internal_Shdr dynsymtab_hdr
;
1941 Elf_Internal_Shdr dynstrtab_hdr
;
1942 Elf_Internal_Shdr dynversym_hdr
;
1943 Elf_Internal_Shdr dynverref_hdr
;
1944 Elf_Internal_Shdr dynverdef_hdr
;
1945 elf_section_list
* symtab_shndx_list
;
1946 bfd_vma gp
; /* The gp value */
1947 unsigned int gp_size
; /* The gp size */
1948 unsigned int num_elf_sections
; /* elf_sect_ptr size */
1949 unsigned char *being_created
;
1951 /* A mapping from external symbols to entries in the linker hash
1952 table, used when linking. This is indexed by the symbol index
1953 minus the sh_info field of the symbol table header. */
1954 struct elf_link_hash_entry
**sym_hashes
;
1956 /* Track usage and final offsets of GOT entries for local symbols.
1957 This array is indexed by symbol index. Elements are used
1958 identically to "got" in struct elf_link_hash_entry. */
1961 bfd_signed_vma
*refcounts
;
1963 struct got_entry
**ents
;
1966 /* The linker ELF emulation code needs to let the backend ELF linker
1967 know what filename should be used for a dynamic object if the
1968 dynamic object is found using a search. The emulation code then
1969 sometimes needs to know what name was actually used. Until the
1970 file has been added to the linker symbol table, this field holds
1971 the name the linker wants. After it has been added, it holds the
1972 name actually used, which will be the DT_SONAME entry if there is
1974 const char *dt_name
;
1976 /* The linker emulation needs to know what audit libs
1977 are used by a dynamic object. */
1978 const char *dt_audit
;
1980 /* Used by find_nearest_line entry point. */
1983 /* A place to stash dwarf1 info for this bfd. */
1984 struct dwarf1_debug
*dwarf1_find_line_info
;
1986 /* A place to stash dwarf2 info for this bfd. */
1987 void *dwarf2_find_line_info
;
1989 /* Stash away info for yet another find line/function variant. */
1990 void *elf_find_function_cache
;
1992 /* Number of symbol version definitions we are about to emit. */
1993 unsigned int cverdefs
;
1995 /* Number of symbol version references we are about to emit. */
1996 unsigned int cverrefs
;
1998 /* Symbol version definitions in external objects. */
1999 Elf_Internal_Verdef
*verdef
;
2001 /* Symbol version references to external objects. */
2002 Elf_Internal_Verneed
*verref
;
2004 /* A pointer to the .eh_frame section. */
2005 asection
*eh_frame_section
;
2007 /* Symbol buffer. */
2010 /* List of GNU properties. Will be updated by setup_gnu_properties
2011 after all input GNU properties are merged for output. */
2012 elf_property_list
*properties
;
2014 obj_attribute known_obj_attributes
[2][NUM_KNOWN_OBJ_ATTRIBUTES
];
2015 obj_attribute_list
*other_obj_attributes
[2];
2017 /* Linked-list containing information about every Systemtap section
2018 found in the object file. Each section corresponds to one entry
2020 struct sdt_note
*sdt_note_head
;
2022 Elf_Internal_Shdr
**group_sect_ptr
;
2023 unsigned int num_group
;
2025 /* Index into group_sect_ptr, updated by setup_group when finding a
2026 section's group. Used to optimize subsequent group searches. */
2027 unsigned int group_search_offset
;
2029 unsigned int symtab_section
, dynsymtab_section
;
2030 unsigned int dynversym_section
, dynverdef_section
, dynverref_section
;
2032 /* An identifier used to distinguish different target
2033 specific extensions to this structure. */
2034 ENUM_BITFIELD (elf_target_id
) object_id
: 6;
2036 /* Whether a dyanmic object was specified normally on the linker
2037 command line, or was specified when --as-needed was in effect,
2038 or was found via a DT_NEEDED entry. */
2039 ENUM_BITFIELD (dynamic_lib_link_class
) dyn_lib_class
: 4;
2041 /* Whether the bfd uses OS specific bits that require ELFOSABI_GNU. */
2042 ENUM_BITFIELD (elf_gnu_osabi
) has_gnu_osabi
: 4;
2044 /* Whether if the bfd contains the GNU_PROPERTY_NO_COPY_ON_PROTECTED
2046 unsigned int has_no_copy_on_protected
: 1;
2048 /* Irix 5 often screws up the symbol table, sorting local symbols
2049 after global symbols. This flag is set if the symbol table in
2050 this BFD appears to be screwed up. If it is, we ignore the
2051 sh_info field in the symbol table header, and always read all the
2053 unsigned int bad_symtab
: 1;
2055 /* Information grabbed from an elf core file. */
2056 struct core_elf_obj_tdata
*core
;
2058 /* More information held for output ELF BFDs. */
2059 struct output_elf_obj_tdata
*o
;
2062 #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
2064 #define elf_object_id(bfd) (elf_tdata(bfd) -> object_id)
2065 #define elf_program_header_size(bfd) (elf_tdata(bfd) -> o->program_header_size)
2066 #define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header)
2067 #define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr)
2068 #define elf_numsections(bfd) (elf_tdata(bfd) -> num_elf_sections)
2069 #define elf_seg_map(bfd) (elf_tdata(bfd) -> o->seg_map)
2070 #define elf_link_info(bfd) (elf_tdata(bfd) -> o->link_info)
2071 #define elf_next_file_pos(bfd) (elf_tdata(bfd) -> o->next_file_pos)
2072 #define elf_eh_frame_hdr(bfd) (elf_tdata(bfd) -> o->eh_frame_hdr)
2073 #define elf_stack_flags(bfd) (elf_tdata(bfd) -> o->stack_flags)
2074 #define elf_shstrtab(bfd) (elf_tdata(bfd) -> o->strtab_ptr)
2075 #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section)
2076 #define elf_symtab_shndx_list(bfd) (elf_tdata(bfd) -> symtab_shndx_list)
2077 #define elf_strtab_sec(bfd) (elf_tdata(bfd) -> o->strtab_section)
2078 #define elf_shstrtab_sec(bfd) (elf_tdata(bfd) -> o->shstrtab_section)
2079 #define elf_symtab_hdr(bfd) (elf_tdata(bfd) -> symtab_hdr)
2080 #define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section)
2081 #define elf_dynversym(bfd) (elf_tdata(bfd) -> dynversym_section)
2082 #define elf_dynverdef(bfd) (elf_tdata(bfd) -> dynverdef_section)
2083 #define elf_dynverref(bfd) (elf_tdata(bfd) -> dynverref_section)
2084 #define elf_eh_frame_section(bfd) \
2085 (elf_tdata(bfd) -> eh_frame_section)
2086 #define elf_section_syms(bfd) (elf_tdata(bfd) -> o->section_syms)
2087 #define elf_num_section_syms(bfd) (elf_tdata(bfd) -> o->num_section_syms)
2088 #define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
2089 #define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
2090 #define elf_gp(bfd) (elf_tdata(bfd) -> gp)
2091 #define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size)
2092 #define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes)
2093 #define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts)
2094 #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets)
2095 #define elf_local_got_ents(bfd) (elf_tdata(bfd) -> local_got.ents)
2096 #define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name)
2097 #define elf_dt_audit(bfd) (elf_tdata(bfd) -> dt_audit)
2098 #define elf_dyn_lib_class(bfd) (elf_tdata(bfd) -> dyn_lib_class)
2099 #define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab)
2100 #define elf_flags_init(bfd) (elf_tdata(bfd) -> o->flags_init)
2101 #define elf_known_obj_attributes(bfd) (elf_tdata (bfd) -> known_obj_attributes)
2102 #define elf_other_obj_attributes(bfd) (elf_tdata (bfd) -> other_obj_attributes)
2103 #define elf_known_obj_attributes_proc(bfd) \
2104 (elf_known_obj_attributes (bfd) [OBJ_ATTR_PROC])
2105 #define elf_other_obj_attributes_proc(bfd) \
2106 (elf_other_obj_attributes (bfd) [OBJ_ATTR_PROC])
2107 #define elf_properties(bfd) (elf_tdata (bfd) -> properties)
2108 #define elf_has_no_copy_on_protected(bfd) \
2109 (elf_tdata(bfd) -> has_no_copy_on_protected)
2111 extern void _bfd_elf_swap_verdef_in
2112 (bfd
*, const Elf_External_Verdef
*, Elf_Internal_Verdef
*);
2113 extern void _bfd_elf_swap_verdef_out
2114 (bfd
*, const Elf_Internal_Verdef
*, Elf_External_Verdef
*);
2115 extern void _bfd_elf_swap_verdaux_in
2116 (bfd
*, const Elf_External_Verdaux
*, Elf_Internal_Verdaux
*);
2117 extern void _bfd_elf_swap_verdaux_out
2118 (bfd
*, const Elf_Internal_Verdaux
*, Elf_External_Verdaux
*);
2119 extern void _bfd_elf_swap_verneed_in
2120 (bfd
*, const Elf_External_Verneed
*, Elf_Internal_Verneed
*);
2121 extern void _bfd_elf_swap_verneed_out
2122 (bfd
*, const Elf_Internal_Verneed
*, Elf_External_Verneed
*);
2123 extern void _bfd_elf_swap_vernaux_in
2124 (bfd
*, const Elf_External_Vernaux
*, Elf_Internal_Vernaux
*);
2125 extern void _bfd_elf_swap_vernaux_out
2126 (bfd
*, const Elf_Internal_Vernaux
*, Elf_External_Vernaux
*);
2127 extern void _bfd_elf_swap_versym_in
2128 (bfd
*, const Elf_External_Versym
*, Elf_Internal_Versym
*);
2129 extern void _bfd_elf_swap_versym_out
2130 (bfd
*, const Elf_Internal_Versym
*, Elf_External_Versym
*);
2132 extern unsigned int _bfd_elf_section_from_bfd_section
2133 (bfd
*, asection
*);
2134 extern char *bfd_elf_string_from_elf_section
2135 (bfd
*, unsigned, unsigned);
2136 extern Elf_Internal_Sym
*bfd_elf_get_elf_syms
2137 (bfd
*, Elf_Internal_Shdr
*, size_t, size_t, Elf_Internal_Sym
*, void *,
2138 Elf_External_Sym_Shndx
*);
2139 extern char * bfd_elf_get_str_section (bfd
*, unsigned int);
2140 extern const char *bfd_elf_sym_name
2141 (bfd
*, Elf_Internal_Shdr
*, Elf_Internal_Sym
*, asection
*);
2143 extern bfd_boolean _bfd_elf_copy_private_bfd_data
2145 extern bfd_boolean _bfd_elf_print_private_bfd_data
2147 const char * _bfd_elf_get_symbol_version_string
2148 (bfd
*, asymbol
*, bfd_boolean
, bfd_boolean
*);
2149 extern void bfd_elf_print_symbol
2150 (bfd
*, void *, asymbol
*, bfd_print_symbol_type
);
2152 extern unsigned int _bfd_elf_eh_frame_address_size
2153 (bfd
*, const asection
*);
2154 extern bfd_byte _bfd_elf_encode_eh_address
2155 (bfd
*abfd
, struct bfd_link_info
*info
, asection
*osec
, bfd_vma offset
,
2156 asection
*loc_sec
, bfd_vma loc_offset
, bfd_vma
*encoded
);
2157 extern bfd_boolean _bfd_elf_can_make_relative
2158 (bfd
*input_bfd
, struct bfd_link_info
*info
, asection
*eh_frame_section
);
2160 extern enum elf_reloc_type_class _bfd_elf_reloc_type_class
2161 (const struct bfd_link_info
*, const asection
*,
2162 const Elf_Internal_Rela
*);
2163 extern bfd_vma _bfd_elf_rela_local_sym
2164 (bfd
*, Elf_Internal_Sym
*, asection
**, Elf_Internal_Rela
*);
2165 extern bfd_vma _bfd_elf_rel_local_sym
2166 (bfd
*, Elf_Internal_Sym
*, asection
**, bfd_vma
);
2167 extern bfd_vma _bfd_elf_section_offset
2168 (bfd
*, struct bfd_link_info
*, asection
*, bfd_vma
);
2170 extern unsigned long bfd_elf_hash
2172 extern unsigned long bfd_elf_gnu_hash
2175 extern bfd_reloc_status_type bfd_elf_generic_reloc
2176 (bfd
*, arelent
*, asymbol
*, void *, asection
*, bfd
*, char **);
2177 extern bfd_boolean bfd_elf_allocate_object
2178 (bfd
*, size_t, enum elf_target_id
);
2179 extern bfd_boolean bfd_elf_make_object
2181 extern bfd_boolean bfd_elf_mkcorefile
2183 extern bfd_boolean _bfd_elf_make_section_from_shdr
2184 (bfd
*, Elf_Internal_Shdr
*, const char *, int);
2185 extern bfd_boolean _bfd_elf_make_section_from_phdr
2186 (bfd
*, Elf_Internal_Phdr
*, int, const char *);
2187 extern struct bfd_hash_entry
*_bfd_elf_link_hash_newfunc
2188 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *);
2189 extern struct bfd_link_hash_table
*_bfd_elf_link_hash_table_create
2191 extern void _bfd_elf_link_hash_table_free
2193 extern void _bfd_elf_link_hash_copy_indirect
2194 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
2195 struct elf_link_hash_entry
*);
2196 extern void _bfd_elf_link_hash_hide_symbol
2197 (struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd_boolean
);
2198 extern void _bfd_elf_link_hide_symbol
2199 (bfd
*, struct bfd_link_info
*, struct bfd_link_hash_entry
*);
2200 extern bfd_boolean _bfd_elf_link_hash_fixup_symbol
2201 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
2202 extern bfd_boolean _bfd_elf_link_hash_table_init
2203 (struct elf_link_hash_table
*, bfd
*,
2204 struct bfd_hash_entry
*(*)
2205 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *),
2206 unsigned int, enum elf_target_id
);
2207 extern bfd_boolean _bfd_elf_slurp_version_tables
2208 (bfd
*, bfd_boolean
);
2209 extern bfd_boolean _bfd_elf_merge_sections
2210 (bfd
*, struct bfd_link_info
*);
2211 extern bfd_boolean _bfd_elf_match_sections_by_type
2212 (bfd
*, const asection
*, bfd
*, const asection
*);
2213 extern bfd_boolean bfd_elf_is_group_section
2214 (bfd
*, const struct bfd_section
*);
2215 extern const char *bfd_elf_group_name
2216 (bfd
*, const struct bfd_section
*);
2217 extern bfd_boolean _bfd_elf_section_already_linked
2218 (bfd
*, asection
*, struct bfd_link_info
*);
2219 extern void bfd_elf_set_group_contents
2220 (bfd
*, asection
*, void *);
2221 extern unsigned int _bfd_elf_filter_global_symbols
2222 (bfd
*, struct bfd_link_info
*, asymbol
**, long);
2223 extern asection
*_bfd_elf_check_kept_section
2224 (asection
*, struct bfd_link_info
*);
2225 #define _bfd_elf_link_just_syms _bfd_generic_link_just_syms
2226 extern void _bfd_elf_copy_link_hash_symbol_type
2227 (bfd
*, struct bfd_link_hash_entry
*, struct bfd_link_hash_entry
*);
2228 extern bfd_boolean _bfd_elf_size_group_sections
2229 (struct bfd_link_info
*);
2230 extern bfd_boolean _bfd_elf_fixup_group_sections
2231 (bfd
*, asection
*);
2232 extern bfd_boolean _bfd_elf_copy_private_header_data
2234 extern bfd_boolean _bfd_elf_copy_private_symbol_data
2235 (bfd
*, asymbol
*, bfd
*, asymbol
*);
2236 #define _bfd_generic_init_private_section_data \
2237 _bfd_elf_init_private_section_data
2238 extern bfd_boolean _bfd_elf_init_private_section_data
2239 (bfd
*, asection
*, bfd
*, asection
*, struct bfd_link_info
*);
2240 extern bfd_boolean _bfd_elf_copy_private_section_data
2241 (bfd
*, asection
*, bfd
*, asection
*);
2242 extern bfd_boolean _bfd_elf_write_object_contents
2244 extern bfd_boolean _bfd_elf_write_corefile_contents
2246 extern bfd_boolean _bfd_elf_set_section_contents
2247 (bfd
*, sec_ptr
, const void *, file_ptr
, bfd_size_type
);
2248 extern long _bfd_elf_get_symtab_upper_bound
2250 extern long _bfd_elf_canonicalize_symtab
2251 (bfd
*, asymbol
**);
2252 extern long _bfd_elf_get_dynamic_symtab_upper_bound
2254 extern long _bfd_elf_canonicalize_dynamic_symtab
2255 (bfd
*, asymbol
**);
2256 extern long _bfd_elf_get_synthetic_symtab
2257 (bfd
*, long, asymbol
**, long, asymbol
**, asymbol
**);
2258 extern long _bfd_elf_get_reloc_upper_bound
2260 extern long _bfd_elf_canonicalize_reloc
2261 (bfd
*, sec_ptr
, arelent
**, asymbol
**);
2262 extern asection
* _bfd_elf_get_dynamic_reloc_section
2263 (bfd
*, asection
*, bfd_boolean
);
2264 extern asection
* _bfd_elf_make_dynamic_reloc_section
2265 (asection
*, bfd
*, unsigned int, bfd
*, bfd_boolean
);
2266 extern long _bfd_elf_get_dynamic_reloc_upper_bound
2268 extern long _bfd_elf_canonicalize_dynamic_reloc
2269 (bfd
*, arelent
**, asymbol
**);
2270 extern asymbol
*_bfd_elf_make_empty_symbol
2272 extern void _bfd_elf_get_symbol_info
2273 (bfd
*, asymbol
*, symbol_info
*);
2274 extern bfd_boolean _bfd_elf_is_local_label_name
2275 (bfd
*, const char *);
2276 extern alent
*_bfd_elf_get_lineno
2278 extern bfd_boolean _bfd_elf_set_arch_mach
2279 (bfd
*, enum bfd_architecture
, unsigned long);
2280 extern bfd_boolean _bfd_elf_find_nearest_line
2281 (bfd
*, asymbol
**, asection
*, bfd_vma
,
2282 const char **, const char **, unsigned int *, unsigned int *);
2283 extern bfd_boolean _bfd_elf_find_line
2284 (bfd
*, asymbol
**, asymbol
*, const char **, unsigned int *);
2285 extern bfd_boolean _bfd_elf_find_inliner_info
2286 (bfd
*, const char **, const char **, unsigned int *);
2287 extern asymbol
*_bfd_elf_find_function
2288 (bfd
*, asymbol
**, asection
*, bfd_vma
, const char **, const char **);
2289 #define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols
2290 #define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
2291 extern int _bfd_elf_sizeof_headers
2292 (bfd
*, struct bfd_link_info
*);
2293 extern bfd_boolean _bfd_elf_new_section_hook
2294 (bfd
*, asection
*);
2295 extern const struct bfd_elf_special_section
*_bfd_elf_get_special_section
2296 (const char *, const struct bfd_elf_special_section
*, unsigned int);
2297 extern const struct bfd_elf_special_section
*_bfd_elf_get_sec_type_attr
2298 (bfd
*, asection
*);
2300 extern bfd_boolean _bfd_elf_link_hide_sym_by_version
2301 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
2303 /* If the target doesn't have reloc handling written yet: */
2304 extern bfd_boolean _bfd_elf_no_info_to_howto
2305 (bfd
*, arelent
*, Elf_Internal_Rela
*);
2307 extern bfd_boolean bfd_section_from_shdr
2308 (bfd
*, unsigned int shindex
);
2309 extern bfd_boolean bfd_section_from_phdr
2310 (bfd
*, Elf_Internal_Phdr
*, int);
2312 extern int _bfd_elf_symbol_from_bfd_symbol
2313 (bfd
*, asymbol
**);
2315 extern Elf_Internal_Sym
*bfd_sym_from_r_symndx
2316 (struct sym_cache
*, bfd
*, unsigned long);
2317 extern asection
*bfd_section_from_elf_index
2318 (bfd
*, unsigned int);
2320 extern struct elf_strtab_hash
* _bfd_elf_strtab_init
2322 extern void _bfd_elf_strtab_free
2323 (struct elf_strtab_hash
*);
2324 extern size_t _bfd_elf_strtab_add
2325 (struct elf_strtab_hash
*, const char *, bfd_boolean
);
2326 extern void _bfd_elf_strtab_addref
2327 (struct elf_strtab_hash
*, size_t);
2328 extern void _bfd_elf_strtab_delref
2329 (struct elf_strtab_hash
*, size_t);
2330 extern unsigned int _bfd_elf_strtab_refcount
2331 (struct elf_strtab_hash
*, size_t);
2332 extern void _bfd_elf_strtab_clear_all_refs
2333 (struct elf_strtab_hash
*);
2334 extern void *_bfd_elf_strtab_save
2335 (struct elf_strtab_hash
*);
2336 extern void _bfd_elf_strtab_restore
2337 (struct elf_strtab_hash
*, void *);
2338 extern bfd_size_type _bfd_elf_strtab_size
2339 (struct elf_strtab_hash
*);
2340 extern bfd_size_type _bfd_elf_strtab_len
2341 (struct elf_strtab_hash
*);
2342 extern bfd_size_type _bfd_elf_strtab_offset
2343 (struct elf_strtab_hash
*, size_t);
2344 extern const char * _bfd_elf_strtab_str
2345 (struct elf_strtab_hash
*, size_t idx
, bfd_size_type
*offset
);
2346 extern bfd_boolean _bfd_elf_strtab_emit
2347 (bfd
*, struct elf_strtab_hash
*);
2348 extern void _bfd_elf_strtab_finalize
2349 (struct elf_strtab_hash
*);
2351 extern bfd_boolean bfd_elf_parse_eh_frame_entries
2352 (bfd
*, struct bfd_link_info
*);
2353 extern bfd_boolean _bfd_elf_parse_eh_frame_entry
2354 (struct bfd_link_info
*, asection
*, struct elf_reloc_cookie
*);
2355 extern void _bfd_elf_parse_eh_frame
2356 (bfd
*, struct bfd_link_info
*, asection
*, struct elf_reloc_cookie
*);
2357 extern bfd_boolean _bfd_elf_end_eh_frame_parsing
2358 (struct bfd_link_info
*info
);
2360 extern bfd_boolean _bfd_elf_discard_section_eh_frame
2361 (bfd
*, struct bfd_link_info
*, asection
*,
2362 bfd_boolean (*) (bfd_vma
, void *), struct elf_reloc_cookie
*);
2363 extern bfd_boolean _bfd_elf_adjust_eh_frame_global_symbol
2364 (struct elf_link_hash_entry
*, void *);
2365 extern bfd_boolean _bfd_elf_discard_section_eh_frame_hdr
2366 (bfd
*, struct bfd_link_info
*);
2367 extern bfd_vma _bfd_elf_eh_frame_section_offset
2368 (bfd
*, struct bfd_link_info
*, asection
*, bfd_vma
);
2369 extern bfd_boolean _bfd_elf_write_section_eh_frame
2370 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
2371 bfd_boolean _bfd_elf_write_section_eh_frame_entry
2372 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
2373 extern bfd_boolean
_bfd_elf_fixup_eh_frame_hdr (struct bfd_link_info
*);
2374 extern bfd_boolean _bfd_elf_write_section_eh_frame_hdr
2375 (bfd
*, struct bfd_link_info
*);
2376 extern bfd_boolean _bfd_elf_eh_frame_present
2377 (struct bfd_link_info
*);
2378 extern bfd_boolean _bfd_elf_eh_frame_entry_present
2379 (struct bfd_link_info
*);
2380 extern bfd_boolean _bfd_elf_maybe_strip_eh_frame_hdr
2381 (struct bfd_link_info
*);
2383 extern bfd_boolean
_bfd_elf_hash_symbol (struct elf_link_hash_entry
*);
2385 extern long _bfd_elf_link_lookup_local_dynindx
2386 (struct bfd_link_info
*, bfd
*, long);
2387 extern bfd_boolean _bfd_elf_compute_section_file_positions
2388 (bfd
*, struct bfd_link_info
*);
2389 extern file_ptr _bfd_elf_assign_file_position_for_section
2390 (Elf_Internal_Shdr
*, file_ptr
, bfd_boolean
);
2391 extern bfd_boolean _bfd_elf_modify_headers
2392 (bfd
*, struct bfd_link_info
*);
2394 extern bfd_boolean _bfd_elf_validate_reloc
2397 extern bfd_boolean bfd_elf_record_link_assignment
2398 (bfd
*, struct bfd_link_info
*, const char *, bfd_boolean
,
2400 extern bfd_boolean
bfd_elf_stack_segment_size (bfd
*, struct bfd_link_info
*,
2401 const char *, bfd_vma
);
2402 extern bfd_boolean bfd_elf_size_dynamic_sections
2403 (bfd
*, const char *, const char *, const char *, const char *, const char *,
2404 const char * const *, struct bfd_link_info
*, struct bfd_section
**);
2405 extern bfd_boolean bfd_elf_size_dynsym_hash_dynstr
2406 (bfd
*, struct bfd_link_info
*);
2407 extern bfd_boolean bfd_elf_get_bfd_needed_list
2408 (bfd
*, struct bfd_link_needed_list
**);
2409 extern struct bfd_link_needed_list
*bfd_elf_get_needed_list
2410 (bfd
*, struct bfd_link_info
*);
2411 extern void bfd_elf_set_dt_needed_name
2412 (bfd
*, const char *);
2413 extern const char *bfd_elf_get_dt_soname
2415 extern void bfd_elf_set_dyn_lib_class
2416 (bfd
*, enum dynamic_lib_link_class
);
2417 extern int bfd_elf_get_dyn_lib_class
2419 extern struct bfd_link_needed_list
*bfd_elf_get_runpath_list
2420 (bfd
*, struct bfd_link_info
*);
2421 extern int bfd_elf_discard_info
2422 (bfd
*, struct bfd_link_info
*);
2423 extern unsigned int _bfd_elf_default_action_discarded
2424 (struct bfd_section
*);
2425 extern struct bfd_section
*_bfd_elf_tls_setup
2426 (bfd
*, struct bfd_link_info
*);
2428 extern bfd_boolean _bfd_elf_link_create_dynamic_sections
2429 (bfd
*, struct bfd_link_info
*);
2430 extern bfd_boolean _bfd_elf_omit_section_dynsym_default
2431 (bfd
*, struct bfd_link_info
*, asection
*);
2432 extern bfd_boolean _bfd_elf_omit_section_dynsym_all
2433 (bfd
*, struct bfd_link_info
*, asection
*);
2434 extern bfd_boolean _bfd_elf_create_dynamic_sections
2435 (bfd
*, struct bfd_link_info
*);
2436 extern bfd_boolean _bfd_elf_create_got_section
2437 (bfd
*, struct bfd_link_info
*);
2438 extern asection
*_bfd_elf_section_for_symbol
2439 (struct elf_reloc_cookie
*, unsigned long, bfd_boolean
);
2440 extern struct elf_link_hash_entry
*_bfd_elf_define_linkage_sym
2441 (bfd
*, struct bfd_link_info
*, asection
*, const char *);
2442 extern void _bfd_elf_init_1_index_section
2443 (bfd
*, struct bfd_link_info
*);
2444 extern void _bfd_elf_init_2_index_sections
2445 (bfd
*, struct bfd_link_info
*);
2447 extern bfd_boolean _bfd_elfcore_make_pseudosection
2448 (bfd
*, char *, size_t, ufile_ptr
);
2449 extern char *_bfd_elfcore_strndup
2450 (bfd
*, char *, size_t);
2452 extern Elf_Internal_Rela
*_bfd_elf_link_read_relocs
2453 (bfd
*, asection
*, void *, Elf_Internal_Rela
*, bfd_boolean
);
2455 extern bfd_boolean _bfd_elf_link_output_relocs
2456 (bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*,
2457 struct elf_link_hash_entry
**);
2459 extern bfd_boolean _bfd_elf_adjust_dynamic_copy
2460 (struct bfd_link_info
*, struct elf_link_hash_entry
*, asection
*);
2462 extern bfd_boolean _bfd_elf_dynamic_symbol_p
2463 (struct elf_link_hash_entry
*, struct bfd_link_info
*, bfd_boolean
);
2465 extern bfd_boolean _bfd_elf_symbol_refs_local_p
2466 (struct elf_link_hash_entry
*, struct bfd_link_info
*, bfd_boolean
);
2468 extern bfd_reloc_status_type bfd_elf_perform_complex_relocation
2469 (bfd
*, asection
*, bfd_byte
*, Elf_Internal_Rela
*, bfd_vma
);
2471 extern bfd_boolean _bfd_elf_setup_sections
2474 extern struct bfd_link_hash_entry
*bfd_elf_define_start_stop
2475 (struct bfd_link_info
*, const char *, asection
*);
2477 extern bfd_boolean
_bfd_elf_init_file_header (bfd
*, struct bfd_link_info
*);
2479 extern bfd_boolean
_bfd_elf_final_write_processing (bfd
*);
2481 extern bfd_cleanup bfd_elf32_object_p
2483 extern bfd_cleanup bfd_elf32_core_file_p
2485 extern char *bfd_elf32_core_file_failing_command
2487 extern int bfd_elf32_core_file_failing_signal
2489 extern bfd_boolean bfd_elf32_core_file_matches_executable_p
2491 extern int bfd_elf32_core_file_pid
2493 extern bfd_boolean _bfd_elf32_core_find_build_id
2496 extern bfd_boolean bfd_elf32_swap_symbol_in
2497 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
2498 extern void bfd_elf32_swap_symbol_out
2499 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
2500 extern void bfd_elf32_swap_reloc_in
2501 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2502 extern void bfd_elf32_swap_reloc_out
2503 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2504 extern void bfd_elf32_swap_reloca_in
2505 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2506 extern void bfd_elf32_swap_reloca_out
2507 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2508 extern void bfd_elf32_swap_phdr_in
2509 (bfd
*, const Elf32_External_Phdr
*, Elf_Internal_Phdr
*);
2510 extern void bfd_elf32_swap_phdr_out
2511 (bfd
*, const Elf_Internal_Phdr
*, Elf32_External_Phdr
*);
2512 extern void bfd_elf32_swap_dyn_in
2513 (bfd
*, const void *, Elf_Internal_Dyn
*);
2514 extern void bfd_elf32_swap_dyn_out
2515 (bfd
*, const Elf_Internal_Dyn
*, void *);
2516 extern long bfd_elf32_slurp_symbol_table
2517 (bfd
*, asymbol
**, bfd_boolean
);
2518 extern bfd_boolean bfd_elf32_write_shdrs_and_ehdr
2520 extern int bfd_elf32_write_out_phdrs
2521 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
2522 extern bfd_boolean bfd_elf32_checksum_contents
2523 (bfd
* , void (*) (const void *, size_t, void *), void *);
2524 extern void bfd_elf32_write_relocs
2525 (bfd
*, asection
*, void *);
2526 extern bfd_boolean bfd_elf32_slurp_reloc_table
2527 (bfd
*, asection
*, asymbol
**, bfd_boolean
);
2529 extern bfd_cleanup bfd_elf64_object_p
2531 extern bfd_cleanup bfd_elf64_core_file_p
2533 extern char *bfd_elf64_core_file_failing_command
2535 extern int bfd_elf64_core_file_failing_signal
2537 extern bfd_boolean bfd_elf64_core_file_matches_executable_p
2539 extern int bfd_elf64_core_file_pid
2541 extern bfd_boolean _bfd_elf64_core_find_build_id
2544 extern bfd_boolean bfd_elf64_swap_symbol_in
2545 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
2546 extern void bfd_elf64_swap_symbol_out
2547 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
2548 extern void bfd_elf64_swap_reloc_in
2549 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2550 extern void bfd_elf64_swap_reloc_out
2551 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2552 extern void bfd_elf64_swap_reloca_in
2553 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2554 extern void bfd_elf64_swap_reloca_out
2555 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2556 extern void bfd_elf64_swap_phdr_in
2557 (bfd
*, const Elf64_External_Phdr
*, Elf_Internal_Phdr
*);
2558 extern void bfd_elf64_swap_phdr_out
2559 (bfd
*, const Elf_Internal_Phdr
*, Elf64_External_Phdr
*);
2560 extern void bfd_elf64_swap_dyn_in
2561 (bfd
*, const void *, Elf_Internal_Dyn
*);
2562 extern void bfd_elf64_swap_dyn_out
2563 (bfd
*, const Elf_Internal_Dyn
*, void *);
2564 extern long bfd_elf64_slurp_symbol_table
2565 (bfd
*, asymbol
**, bfd_boolean
);
2566 extern bfd_boolean bfd_elf64_write_shdrs_and_ehdr
2568 extern int bfd_elf64_write_out_phdrs
2569 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
2570 extern bfd_boolean bfd_elf64_checksum_contents
2571 (bfd
* , void (*) (const void *, size_t, void *), void *);
2572 extern void bfd_elf64_write_relocs
2573 (bfd
*, asection
*, void *);
2574 extern bfd_boolean bfd_elf64_slurp_reloc_table
2575 (bfd
*, asection
*, asymbol
**, bfd_boolean
);
2577 extern bfd_boolean _bfd_elf_default_relocs_compatible
2578 (const bfd_target
*, const bfd_target
*);
2580 extern bfd_boolean _bfd_elf_relocs_compatible
2581 (const bfd_target
*, const bfd_target
*);
2582 extern bfd_boolean _bfd_elf_notice_as_needed
2583 (bfd
*, struct bfd_link_info
*, enum notice_asneeded_action
);
2585 extern struct elf_link_hash_entry
*_bfd_elf_archive_symbol_lookup
2586 (bfd
*, struct bfd_link_info
*, const char *);
2587 extern bfd_boolean bfd_elf_link_add_symbols
2588 (bfd
*, struct bfd_link_info
*);
2589 extern bfd_boolean _bfd_elf_add_dynamic_entry
2590 (struct bfd_link_info
*, bfd_vma
, bfd_vma
);
2591 extern bfd_boolean _bfd_elf_strip_zero_sized_dynamic_sections
2592 (struct bfd_link_info
*);
2593 extern int bfd_elf_add_dt_needed_tag
2594 (bfd
*, struct bfd_link_info
*);
2595 extern bfd_boolean _bfd_elf_link_check_relocs
2596 (bfd
*, struct bfd_link_info
*);
2598 extern bfd_boolean bfd_elf_link_record_dynamic_symbol
2599 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
2601 extern int bfd_elf_link_record_local_dynamic_symbol
2602 (struct bfd_link_info
*, bfd
*, long);
2604 extern bfd_boolean _bfd_elf_close_and_cleanup
2607 extern bfd_boolean _bfd_elf_common_definition
2608 (Elf_Internal_Sym
*);
2610 extern unsigned int _bfd_elf_common_section_index
2613 extern asection
*_bfd_elf_common_section
2616 extern bfd_vma _bfd_elf_default_got_elt_size
2617 (bfd
*, struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd
*,
2620 extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn
2621 (bfd
*, arelent
*, struct bfd_symbol
*, void *,
2622 asection
*, bfd
*, char **);
2624 extern bfd_boolean bfd_elf_final_link
2625 (bfd
*, struct bfd_link_info
*);
2627 extern void _bfd_elf_gc_keep
2628 (struct bfd_link_info
*info
);
2630 extern bfd_boolean bfd_elf_gc_mark_dynamic_ref_symbol
2631 (struct elf_link_hash_entry
*h
, void *inf
);
2633 extern bfd_boolean bfd_elf_gc_sections
2634 (bfd
*, struct bfd_link_info
*);
2636 extern bfd_boolean bfd_elf_gc_record_vtinherit
2637 (bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
);
2639 extern bfd_boolean bfd_elf_gc_record_vtentry
2640 (bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
);
2642 extern asection
*_bfd_elf_gc_mark_hook
2643 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
2644 struct elf_link_hash_entry
*, Elf_Internal_Sym
*);
2646 extern asection
*_bfd_elf_gc_mark_rsec
2647 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
,
2648 struct elf_reloc_cookie
*, bfd_boolean
*);
2650 extern bfd_boolean _bfd_elf_gc_mark_reloc
2651 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
,
2652 struct elf_reloc_cookie
*);
2654 extern bfd_boolean _bfd_elf_gc_mark_fdes
2655 (struct bfd_link_info
*, asection
*, asection
*, elf_gc_mark_hook_fn
,
2656 struct elf_reloc_cookie
*);
2658 extern bfd_boolean _bfd_elf_gc_mark
2659 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
);
2661 extern bfd_boolean _bfd_elf_gc_mark_extra_sections
2662 (struct bfd_link_info
*, elf_gc_mark_hook_fn
);
2664 extern bfd_boolean bfd_elf_gc_common_finalize_got_offsets
2665 (bfd
*, struct bfd_link_info
*);
2667 extern bfd_boolean bfd_elf_gc_common_final_link
2668 (bfd
*, struct bfd_link_info
*);
2670 extern bfd_boolean bfd_elf_reloc_symbol_deleted_p
2673 extern struct elf_segment_map
* _bfd_elf_make_dynamic_segment
2674 (bfd
*, asection
*);
2676 extern bfd_boolean _bfd_elf_map_sections_to_segments
2677 (bfd
*, struct bfd_link_info
*);
2679 extern bfd_boolean
_bfd_elf_is_function_type (unsigned int);
2681 extern bfd_size_type
_bfd_elf_maybe_function_sym (const asymbol
*, asection
*,
2684 extern asection
*_bfd_elf_plt_get_reloc_section (bfd
*, const char *);
2686 extern int bfd_elf_get_default_section_type (flagword
);
2688 extern bfd_boolean bfd_elf_lookup_section_flags
2689 (struct bfd_link_info
*, struct flag_info
*, asection
*);
2691 extern Elf_Internal_Phdr
* _bfd_elf_find_segment_containing_section
2692 (bfd
* abfd
, asection
* section
);
2694 /* PowerPC @tls opcode transform/validate. */
2695 extern unsigned int _bfd_elf_ppc_at_tls_transform
2696 (unsigned int, unsigned int);
2697 /* PowerPC @tprel opcode transform/validate. */
2698 extern unsigned int _bfd_elf_ppc_at_tprel_transform
2699 (unsigned int, unsigned int);
2700 /* PowerPC elf_object_p tweak. */
2701 extern bfd_boolean
_bfd_elf_ppc_set_arch (bfd
*);
2702 /* PowerPC .gnu.attributes handling common to both 32-bit and 64-bit. */
2703 extern bfd_boolean _bfd_elf_ppc_merge_fp_attributes
2704 (bfd
*, struct bfd_link_info
*);
2706 /* Return an upper bound on the number of bytes required to store a
2707 copy of ABFD's program header table entries. Return -1 if an error
2708 occurs; bfd_get_error will return an appropriate code. */
2709 extern long bfd_get_elf_phdr_upper_bound
2712 /* Copy ABFD's program header table entries to *PHDRS. The entries
2713 will be stored as an array of Elf_Internal_Phdr structures, as
2714 defined in include/elf/internal.h. To find out how large the
2715 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
2717 Return the number of program header table entries read, or -1 if an
2718 error occurs; bfd_get_error will return an appropriate code. */
2719 extern int bfd_get_elf_phdrs
2720 (bfd
*abfd
, void *phdrs
);
2722 /* Exported interface for writing elf corefile notes. */
2723 extern char *elfcore_write_note
2724 (bfd
*, char *, int *, const char *, int, const void *, int);
2725 extern char *elfcore_write_prpsinfo
2726 (bfd
*, char *, int *, const char *, const char *);
2727 extern char *elfcore_write_prstatus
2728 (bfd
*, char *, int *, long, int, const void *);
2729 extern char * elfcore_write_pstatus
2730 (bfd
*, char *, int *, long, int, const void *);
2731 extern char *elfcore_write_prfpreg
2732 (bfd
*, char *, int *, const void *, int);
2733 extern char *elfcore_write_prxfpreg
2734 (bfd
*, char *, int *, const void *, int);
2735 extern char *elfcore_write_xstatereg
2736 (bfd
*, char *, int *, const void *, int);
2737 extern char *elfcore_write_ppc_vmx
2738 (bfd
*, char *, int *, const void *, int);
2739 extern char *elfcore_write_ppc_vsx
2740 (bfd
*, char *, int *, const void *, int);
2741 extern char *elfcore_write_ppc_tar
2742 (bfd
*, char *, int *, const void *, int);
2743 extern char *elfcore_write_ppc_ppr
2744 (bfd
*, char *, int *, const void *, int);
2745 extern char *elfcore_write_ppc_dscr
2746 (bfd
*, char *, int *, const void *, int);
2747 extern char *elfcore_write_ppc_ebb
2748 (bfd
*, char *, int *, const void *, int);
2749 extern char *elfcore_write_ppc_pmu
2750 (bfd
*, char *, int *, const void *, int);
2751 extern char *elfcore_write_ppc_tm_cgpr
2752 (bfd
*, char *, int *, const void *, int);
2753 extern char *elfcore_write_ppc_tm_cfpr
2754 (bfd
*, char *, int *, const void *, int);
2755 extern char *elfcore_write_ppc_tm_cvmx
2756 (bfd
*, char *, int *, const void *, int);
2757 extern char *elfcore_write_ppc_tm_cvsx
2758 (bfd
*, char *, int *, const void *, int);
2759 extern char *elfcore_write_ppc_tm_spr
2760 (bfd
*, char *, int *, const void *, int);
2761 extern char *elfcore_write_ppc_tm_ctar
2762 (bfd
*, char *, int *, const void *, int);
2763 extern char *elfcore_write_ppc_tm_cppr
2764 (bfd
*, char *, int *, const void *, int);
2765 extern char *elfcore_write_ppc_tm_cdscr
2766 (bfd
*, char *, int *, const void *, int);
2767 extern char *elfcore_write_s390_timer
2768 (bfd
*, char *, int *, const void *, int);
2769 extern char *elfcore_write_s390_todcmp
2770 (bfd
*, char *, int *, const void *, int);
2771 extern char *elfcore_write_s390_todpreg
2772 (bfd
*, char *, int *, const void *, int);
2773 extern char *elfcore_write_s390_ctrs
2774 (bfd
*, char *, int *, const void *, int);
2775 extern char *elfcore_write_s390_prefix
2776 (bfd
*, char *, int *, const void *, int);
2777 extern char *elfcore_write_s390_last_break
2778 (bfd
*, char *, int *, const void *, int);
2779 extern char *elfcore_write_s390_system_call
2780 (bfd
*, char *, int *, const void *, int);
2781 extern char *elfcore_write_s390_tdb
2782 (bfd
*, char *, int *, const void *, int);
2783 extern char *elfcore_write_s390_vxrs_low
2784 (bfd
*, char *, int *, const void *, int);
2785 extern char *elfcore_write_s390_vxrs_high
2786 (bfd
*, char *, int *, const void *, int);
2787 extern char *elfcore_write_s390_gs_cb
2788 (bfd
*, char *, int *, const void *, int);
2789 extern char *elfcore_write_s390_gs_bc
2790 (bfd
*, char *, int *, const void *, int);
2791 extern char *elfcore_write_arm_vfp
2792 (bfd
*, char *, int *, const void *, int);
2793 extern char *elfcore_write_aarch_tls
2794 (bfd
*, char *, int *, const void *, int);
2795 extern char *elfcore_write_aarch_hw_break
2796 (bfd
*, char *, int *, const void *, int);
2797 extern char *elfcore_write_aarch_hw_watch
2798 (bfd
*, char *, int *, const void *, int);
2799 extern char *elfcore_write_aarch_sve
2800 (bfd
*, char *, int *, const void *, int);
2801 extern char *elfcore_write_aarch_pauth
2802 (bfd
*, char *, int *, const void *, int);
2803 extern char *elfcore_write_arc_v2
2804 (bfd
*, char *, int *, const void *, int);
2805 extern char *elfcore_write_riscv_csr
2806 (bfd
*, char *, int *, const void *, int);
2807 extern char *elfcore_write_gdb_tdesc
2808 (bfd
*, char *, int *, const void *, int);
2809 extern char *elfcore_write_lwpstatus
2810 (bfd
*, char *, int *, long, int, const void *);
2811 extern char *elfcore_write_register_note
2812 (bfd
*, char *, int *, const char *, const void *, int);
2813 extern char *elfcore_write_file_note
2814 (bfd
*, char *, int *, const void*, int);
2816 /* Internal structure which holds information to be included in the
2817 PRPSINFO section of Linux core files.
2819 This is an "internal" structure in the sense that it should be used
2820 to pass information to BFD (via the `elfcore_write_linux_prpsinfo'
2821 function), so things like endianess shouldn't be an issue. This
2822 structure will eventually be converted in one of the
2823 `elf_external_linux_*' structures and written out to an output bfd
2824 by one of the functions declared below. */
2826 struct elf_internal_linux_prpsinfo
2828 char pr_state
; /* Numeric process state. */
2829 char pr_sname
; /* Char for pr_state. */
2830 char pr_zomb
; /* Zombie. */
2831 char pr_nice
; /* Nice val. */
2832 unsigned long pr_flag
; /* Flags. */
2833 unsigned int pr_uid
;
2834 unsigned int pr_gid
;
2835 int pr_pid
, pr_ppid
, pr_pgrp
, pr_sid
;
2836 char pr_fname
[16 + 1]; /* Filename of executable. */
2837 char pr_psargs
[80 + 1]; /* Initial part of arg list. */
2840 /* Linux/most 32-bit archs. */
2841 extern char *elfcore_write_linux_prpsinfo32
2842 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
2844 /* Linux/most 64-bit archs. */
2845 extern char *elfcore_write_linux_prpsinfo64
2846 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
2848 extern bfd
*_bfd_elf32_bfd_from_remote_memory
2849 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
2850 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, bfd_size_type
));
2851 extern bfd
*_bfd_elf64_bfd_from_remote_memory
2852 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
2853 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, bfd_size_type
));
2855 extern bfd_vma
bfd_elf_obj_attr_size (bfd
*);
2856 extern void bfd_elf_set_obj_attr_contents (bfd
*, bfd_byte
*, bfd_vma
);
2857 extern int bfd_elf_get_obj_attr_int (bfd
*, int, unsigned int);
2858 extern void bfd_elf_add_obj_attr_int (bfd
*, int, unsigned int, unsigned int);
2859 #define bfd_elf_add_proc_attr_int(BFD, TAG, VALUE) \
2860 bfd_elf_add_obj_attr_int ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2861 extern void bfd_elf_add_obj_attr_string (bfd
*, int, unsigned int, const char *);
2862 #define bfd_elf_add_proc_attr_string(BFD, TAG, VALUE) \
2863 bfd_elf_add_obj_attr_string ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2864 extern void bfd_elf_add_obj_attr_int_string (bfd
*, int, unsigned int,
2865 unsigned int, const char *);
2866 #define bfd_elf_add_proc_attr_int_string(BFD, TAG, INTVAL, STRVAL) \
2867 bfd_elf_add_obj_attr_int_string ((BFD), OBJ_ATTR_PROC, (TAG), \
2870 extern char *_bfd_elf_attr_strdup (bfd
*, const char *);
2871 extern void _bfd_elf_copy_obj_attributes (bfd
*, bfd
*);
2872 extern int _bfd_elf_obj_attrs_arg_type (bfd
*, int, unsigned int);
2873 extern void _bfd_elf_parse_attributes (bfd
*, Elf_Internal_Shdr
*);
2874 extern bfd_boolean _bfd_elf_merge_object_attributes
2875 (bfd
*, struct bfd_link_info
*);
2876 extern bfd_boolean
_bfd_elf_merge_unknown_attribute_low (bfd
*, bfd
*, int);
2877 extern bfd_boolean
_bfd_elf_merge_unknown_attribute_list (bfd
*, bfd
*);
2878 extern Elf_Internal_Shdr
*_bfd_elf_single_rel_hdr (asection
*sec
);
2879 extern bfd_boolean
elf_read_notes (bfd
*, file_ptr
, bfd_size_type
, size_t);
2881 extern bfd_boolean _bfd_elf_parse_gnu_properties
2882 (bfd
*, Elf_Internal_Note
*);
2883 extern elf_property
* _bfd_elf_get_property
2884 (bfd
*, unsigned int, unsigned int);
2885 extern bfd
*_bfd_elf_link_setup_gnu_properties
2886 (struct bfd_link_info
*);
2887 extern bfd_size_type _bfd_elf_convert_gnu_property_size
2889 extern bfd_boolean _bfd_elf_convert_gnu_properties
2890 (bfd
*, asection
*, bfd
*, bfd_byte
**, bfd_size_type
*);
2892 /* The linker may need to keep track of the number of relocs that it
2893 decides to copy as dynamic relocs in check_relocs for each symbol.
2894 This is so that it can later discard them if they are found to be
2895 unnecessary. We can store the information in a field extending the
2896 regular ELF linker hash table. */
2898 struct elf_dyn_relocs
2900 struct elf_dyn_relocs
*next
;
2902 /* The input section of the reloc. */
2905 /* Total number of relocs copied for the input section. */
2906 bfd_size_type count
;
2908 /* Number of pc-relative relocs copied for the input section. */
2909 bfd_size_type pc_count
;
2912 extern bfd_boolean _bfd_elf_create_ifunc_sections
2913 (bfd
*, struct bfd_link_info
*);
2914 extern bfd_boolean _bfd_elf_allocate_ifunc_dyn_relocs
2915 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
2916 struct elf_dyn_relocs
**, unsigned int, unsigned int,
2917 unsigned int, bfd_boolean
);
2919 extern void elf_append_rela (bfd
*, asection
*, Elf_Internal_Rela
*);
2920 extern void elf_append_rel (bfd
*, asection
*, Elf_Internal_Rela
*);
2922 extern bfd_vma
elf64_r_info (bfd_vma
, bfd_vma
);
2923 extern bfd_vma
elf64_r_sym (bfd_vma
);
2924 extern bfd_vma
elf32_r_info (bfd_vma
, bfd_vma
);
2925 extern bfd_vma
elf32_r_sym (bfd_vma
);
2927 extern bfd_boolean
is_debuginfo_file (bfd
*);
2930 extern bfd_boolean _bfd_elf_init_secondary_reloc_section
2931 (bfd
*, Elf_Internal_Shdr
*, const char *, unsigned int);
2932 extern bfd_boolean _bfd_elf_slurp_secondary_reloc_section
2933 (bfd
*, asection
*, asymbol
**, bfd_boolean
);
2934 extern bfd_boolean _bfd_elf_copy_special_section_fields
2935 (const bfd
*, bfd
*, const Elf_Internal_Shdr
*, Elf_Internal_Shdr
*);
2936 extern bfd_boolean _bfd_elf_write_secondary_reloc_section
2937 (bfd
*, asection
*);
2938 extern unsigned int _bfd_elf_symbol_section_index
2939 (bfd
*, elf_symbol_type
*);
2941 extern asection
*_bfd_elf_readonly_dynrelocs
2942 (struct elf_link_hash_entry
*);
2943 extern bfd_boolean _bfd_elf_maybe_set_textrel
2944 (struct elf_link_hash_entry
*, void *);
2946 extern bfd_boolean _bfd_elf_add_dynamic_tags
2947 (bfd
*, struct bfd_link_info
*, bfd_boolean
);
2949 /* Large common section. */
2950 extern asection _bfd_elf_large_com_section
;
2952 /* Hash for local symbol with the first section id, ID, in the input
2953 file and the local symbol index, SYM. */
2954 #define ELF_LOCAL_SYMBOL_HASH(ID, SYM) \
2955 (((((ID) & 0xffU) << 24) | (((ID) & 0xff00) << 8)) \
2956 ^ (SYM) ^ (((ID) & 0xffff0000U) >> 16))
2958 /* This is the condition under which finish_dynamic_symbol will be called.
2959 If our finish_dynamic_symbol isn't called, we'll need to do something
2960 about initializing any .plt and .got entries in relocate_section. */
2961 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
2963 && ((SHARED) || !(H)->forced_local) \
2964 && ((H)->dynindx != -1 || (H)->forced_local))
2966 /* This macro is to avoid lots of duplicated code in the body
2967 of xxx_relocate_section() in the various elfxx-xxxx.c files. */
2968 #define RELOC_FOR_GLOBAL_SYMBOL(info, input_bfd, input_section, rel, \
2969 r_symndx, symtab_hdr, sym_hashes, \
2970 h, sec, relocation, \
2971 unresolved_reloc, warned, ignored) \
2974 /* It seems this can happen with erroneous or unsupported \
2975 input (mixing a.out and elf in an archive, for example.) */ \
2976 if (sym_hashes == NULL) \
2979 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; \
2981 if (info->wrap_hash != NULL \
2982 && (input_section->flags & SEC_DEBUGGING) != 0) \
2983 h = ((struct elf_link_hash_entry *) \
2984 unwrap_hash_lookup (info, input_bfd, &h->root)); \
2986 while (h->root.type == bfd_link_hash_indirect \
2987 || h->root.type == bfd_link_hash_warning) \
2988 h = (struct elf_link_hash_entry *) h->root.u.i.link; \
2992 unresolved_reloc = FALSE; \
2994 if (h->root.type == bfd_link_hash_defined \
2995 || h->root.type == bfd_link_hash_defweak) \
2997 sec = h->root.u.def.section; \
2999 || sec->output_section == NULL) \
3000 /* Set a flag that will be cleared later if we find a \
3001 relocation value for this symbol. output_section \
3002 is typically NULL for symbols satisfied by a shared \
3004 unresolved_reloc = TRUE; \
3006 relocation = (h->root.u.def.value \
3007 + sec->output_section->vma \
3008 + sec->output_offset); \
3010 else if (h->root.type == bfd_link_hash_undefweak) \
3012 else if (info->unresolved_syms_in_objects == RM_IGNORE \
3013 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) \
3015 else if (!bfd_link_relocatable (info)) \
3018 err = (info->unresolved_syms_in_objects == RM_DIAGNOSE && \
3019 !info->warn_unresolved_syms) \
3020 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT; \
3021 (*info->callbacks->undefined_symbol) (info, \
3022 h->root.root.string, \
3025 rel->r_offset, err); \
3028 (void) unresolved_reloc; \
3034 /* This macro is to avoid lots of duplicated code in the body of the
3035 loop over relocations in xxx_relocate_section() in the various
3038 Handle relocations against symbols from removed linkonce sections,
3039 or sections discarded by a linker script. When doing a relocatable
3040 link, we remove such relocations. Otherwise, we just want the
3041 section contents zeroed and avoid any special processing. */
3042 #define RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
3043 rel, count, relend, \
3044 howto, index, contents) \
3047 _bfd_clear_contents (howto, input_bfd, input_section, \
3048 contents, rel[index].r_offset); \
3050 if (bfd_link_relocatable (info) \
3051 && (input_section->flags & SEC_DEBUGGING)) \
3053 /* Only remove relocations in debug sections since other \
3054 sections may require relocations. */ \
3055 Elf_Internal_Shdr *rel_hdr; \
3057 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
3059 /* Avoid empty output section. */ \
3060 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
3062 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
3063 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
3064 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
3066 memmove (rel, rel + count, \
3067 (relend - rel - count) * sizeof (*rel)); \
3069 input_section->reloc_count -= count; \
3076 for (i_ = 0; i_ < count; i_++) \
3078 rel[i_].r_info = 0; \
3079 rel[i_].r_addend = 0; \
3085 /* Will a symbol be bound to the definition within the shared
3086 library, if any. A unique symbol can never be bound locally. */
3087 #define SYMBOLIC_BIND(INFO, H) \
3088 (!(H)->unique_global \
3089 && ((INFO)->symbolic \
3090 || (H)->start_stop \
3091 || ((INFO)->dynamic && !(H)->dynamic)))
3093 /* Determine if a section contains CTF data, using its name. */
3094 static inline bfd_boolean
3095 bfd_section_is_ctf (const asection
*sec
)
3097 const char *name
= bfd_section_name (sec
);
3098 return strncmp (name
, ".ctf", 4) == 0 && (name
[4] == 0 || name
[4] == '.');
3104 #endif /* _LIBELF_H_ */