1 /* BFD back-end data structures for ELF files.
2 Copyright (C) 1992-2022 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. */
27 #include "elf/common.h"
28 #include "elf/external.h"
29 #include "elf/internal.h"
32 #ifndef ENABLE_CHECKING
33 #define ENABLE_CHECKING 0
40 /* The number of entries in a section is its size divided by the size
41 of a single entry. This is normally only applicable to reloc and
42 symbol table sections.
43 PR 9934: It is possible to have relocations that do not refer to
44 symbols, thus it is also possible to have a relocation section in
45 an object file, but no symbol table. */
46 #define NUM_SHDR_ENTRIES(shdr) ((shdr)->sh_entsize > 0 ? (shdr)->sh_size / (shdr)->sh_entsize : 0)
48 /* If size isn't specified as 64 or 32, NAME macro should fail. */
51 #define NAME(x, y) x ## 64 ## _ ## y
54 #define NAME(x, y) x ## 32 ## _ ## y
59 #define NAME(x, y) x ## NOSIZE ## _ ## y
62 #define ElfNAME(X) NAME(Elf,X)
63 #define elfNAME(X) NAME(elf,X)
65 /* Information held for an ELF symbol. The first field is the
66 corresponding asymbol. Every symbol is an ELF file is actually a
67 pointer to this structure, although it is often handled as a
68 pointer to an asymbol. */
74 /* ELF symbol information. */
75 Elf_Internal_Sym internal_elf_sym
;
76 /* Backend specific information. */
79 unsigned int hppa_arg_reloc
;
85 /* Version information. This is from an Elf_Internal_Versym
86 structure in a SHT_GNU_versym section. It is zero if there is no
87 version information. */
88 unsigned short version
;
92 struct elf_strtab_hash
;
98 bfd_signed_vma refcount
;
100 struct got_entry
*glist
;
101 struct plt_entry
*plist
;
104 struct elf_link_virtual_table_entry
106 /* Virtual table entry use information. This array is nominally of size
107 size/sizeof(target_void_pointer), though we have to be able to assume
108 and track a size while the symbol is still undefined. It is indexed
109 via offset/sizeof(target_void_pointer). */
113 /* Virtual table derivation info. */
114 struct elf_link_hash_entry
*parent
;
117 /* ELF symbol version. */
118 enum elf_symbol_version
126 /* ELF linker hash table entries. */
128 struct elf_link_hash_entry
130 struct bfd_link_hash_entry root
;
132 /* Symbol index in output file. This is initialized to -1. It is
133 set to -2 if the symbol is used by a reloc. It is set to -3 if
134 this symbol is defined in a discarded section. */
137 /* Symbol index as a dynamic symbol. Initialized to -1, and remains
138 -1 if this is not a dynamic symbol. */
139 /* ??? Note that this is consistently used as a synonym for tests
140 against whether we can perform various simplifying transformations
141 to the code. (E.g. changing a pc-relative jump to a PLT entry
142 into a pc-relative jump to the target function.) That test, which
143 is often relatively complex, and someplaces wrong or incomplete,
144 should really be replaced by a predicate in elflink.c.
146 End result: this field -1 does not indicate that the symbol is
147 not in the dynamic symbol table, but rather that the symbol is
148 not visible outside this DSO. */
151 /* If this symbol requires an entry in the global offset table, the
152 processor specific backend uses this field to track usage and
153 final offset. Two schemes are supported: The first assumes that
154 a symbol may only have one GOT entry, and uses REFCOUNT until
155 size_dynamic_sections, at which point the contents of the .got is
156 fixed. Afterward, if OFFSET is -1, then the symbol does not
157 require a global offset table entry. The second scheme allows
158 multiple GOT entries per symbol, managed via a linked list
159 pointed to by GLIST. */
160 union gotplt_union got
;
162 /* Same, but tracks a procedure linkage table entry. */
163 union gotplt_union plt
;
165 /* Symbol size. NB: All fields starting from here are cleared by
166 _bfd_elf_link_hash_newfunc. */
169 /* Track dynamic relocs copied for this symbol. */
170 struct elf_dyn_relocs
*dyn_relocs
;
172 /* Symbol type (STT_NOTYPE, STT_OBJECT, etc.). */
173 unsigned int type
: 8;
175 /* Symbol st_other value, symbol visibility. */
176 unsigned int other
: 8;
178 /* The symbol's st_target_internal value (see Elf_Internal_Sym). */
179 unsigned int target_internal
: 8;
181 /* Symbol is referenced by a non-shared object (other than the object
182 in which it is defined). */
183 unsigned int ref_regular
: 1;
184 /* Symbol is defined by a non-shared object. */
185 unsigned int def_regular
: 1;
186 /* Symbol is referenced by a shared object. */
187 unsigned int ref_dynamic
: 1;
188 /* Symbol is defined by a shared object. */
189 unsigned int def_dynamic
: 1;
190 /* Symbol has a non-weak reference from a non-shared object (other than
191 the object in which it is defined). */
192 unsigned int ref_regular_nonweak
: 1;
193 /* Symbol has a non-weak reference from a LTO IR object file. */
194 unsigned int ref_ir_nonweak
: 1;
195 /* Dynamic symbol has been adjustd. */
196 unsigned int dynamic_adjusted
: 1;
197 /* Symbol needs a copy reloc. */
198 unsigned int needs_copy
: 1;
199 /* Symbol needs a procedure linkage table entry. */
200 unsigned int needs_plt
: 1;
201 /* Symbol appears in a non-ELF input file. */
202 unsigned int non_elf
: 1;
203 /* Symbol version information. */
204 ENUM_BITFIELD (elf_symbol_version
) versioned
: 2;
205 /* Symbol was forced to local scope due to a version script file. */
206 unsigned int forced_local
: 1;
207 /* Symbol was forced to be dynamic due to a version script file. */
208 unsigned int dynamic
: 1;
209 /* Symbol was marked during garbage collection. */
210 unsigned int mark
: 1;
211 /* Symbol is referenced by a non-GOT/non-PLT relocation. This is
212 not currently set by all the backends. */
213 unsigned int non_got_ref
: 1;
214 /* Symbol has a definition in a shared object.
215 FIXME: There is no real need for this field if def_dynamic is never
216 cleared and all places that test def_dynamic also test def_regular. */
217 unsigned int dynamic_def
: 1;
218 /* Symbol has a non-weak reference from a shared object. */
219 unsigned int ref_dynamic_nonweak
: 1;
220 /* Symbol is referenced with a relocation where C/C++ pointer equality
222 unsigned int pointer_equality_needed
: 1;
223 /* Symbol is a unique global symbol. */
224 unsigned int unique_global
: 1;
225 /* Symbol is defined by a shared library with non-default visibility
226 in a read/write section. */
227 unsigned int protected_def
: 1;
228 /* Symbol is __start_SECNAME or __stop_SECNAME to mark section
230 unsigned int start_stop
: 1;
231 /* Symbol is or was a weak defined symbol from a dynamic object with
232 a strong defined symbol alias. U.ALIAS points to a list of aliases,
233 the definition having is_weakalias clear. */
234 unsigned int is_weakalias
: 1;
236 /* String table index in .dynstr if this is a dynamic symbol. */
237 unsigned long dynstr_index
;
241 /* Points to a circular list of non-function symbol aliases. */
242 struct elf_link_hash_entry
*alias
;
244 /* Hash value of the name computed using the ELF hash function.
245 Used part way through size_dynamic_sections, after we've finished
247 unsigned long elf_hash_value
;
250 /* Version information. */
253 /* This field is used for a symbol which is not defined in a
254 regular object. It points to the version information read in
255 from the dynamic object. */
256 Elf_Internal_Verdef
*verdef
;
257 /* This field is used for a symbol which is defined in a regular
258 object. It is set up in size_dynamic_sections. It points to
259 the version information we should write out for this symbol. */
260 struct bfd_elf_version_tree
*vertree
;
265 /* For __start_SECNAME and __stop_SECNAME symbols, record the first
266 input section whose section name is SECNAME. */
267 asection
*start_stop_section
;
269 /* Vtable information. */
270 struct elf_link_virtual_table_entry
*vtable
;
274 /* Return the strong definition for a weak symbol with aliases. */
276 static inline struct elf_link_hash_entry
*
277 weakdef (struct elf_link_hash_entry
*h
)
279 while (h
->is_weakalias
)
284 /* Will references to this symbol always reference the symbol
286 #define SYMBOL_REFERENCES_LOCAL(INFO, H) \
287 _bfd_elf_symbol_refs_local_p (H, INFO, 0)
289 /* Will _calls_ to this symbol always call the version in this object? */
290 #define SYMBOL_CALLS_LOCAL(INFO, H) \
291 _bfd_elf_symbol_refs_local_p (H, INFO, 1)
293 /* Whether an undefined weak symbol should resolve to its link-time
294 value, even in PIC or PIE objects. The linker_def test is to
295 handle symbols like __ehdr_start that may be undefweak in early
296 stages of linking but are guaranteed to be defined later. */
297 #define UNDEFWEAK_NO_DYNAMIC_RELOC(INFO, H) \
298 ((H)->root.type == bfd_link_hash_undefweak \
299 && !(H)->root.linker_def \
300 && (ELF_ST_VISIBILITY ((H)->other) != STV_DEFAULT \
301 || (INFO)->dynamic_undefined_weak == 0))
303 /* Common symbols that are turned into definitions don't have the
304 DEF_REGULAR flag set, so they might appear to be undefined.
305 Symbols defined in linker scripts also don't have DEF_REGULAR set. */
306 #define ELF_COMMON_DEF_P(H) \
308 && !(H)->def_dynamic \
309 && (H)->root.type == bfd_link_hash_defined)
311 /* Records local symbols to be emitted in the dynamic symbol table. */
313 struct elf_link_local_dynamic_entry
315 struct elf_link_local_dynamic_entry
*next
;
317 /* The input bfd this symbol came from. */
320 /* The index of the local symbol being copied. */
323 /* The index in the outgoing dynamic symbol table. */
326 /* A copy of the input symbol. */
327 Elf_Internal_Sym isym
;
330 struct elf_link_loaded_list
332 struct elf_link_loaded_list
*next
;
336 /* Structures used by the eh_frame optimization code. */
341 /* If REMOVED == 1, this is the CIE that the FDE originally used.
342 The CIE belongs to the same .eh_frame input section as the FDE.
344 If REMOVED == 0, this is the CIE that we have chosen to use for
345 the output FDE. The CIE's REMOVED field is also 0, but the CIE
346 might belong to a different .eh_frame input section from the FDE.
348 May be NULL to signify that the FDE should be discarded. */
349 struct eh_cie_fde
*cie_inf
;
350 struct eh_cie_fde
*next_for_section
;
353 /* CIEs have three states:
355 - REMOVED && !MERGED: Slated for removal because we haven't yet
356 proven that an FDE needs it. FULL_CIE, if nonnull, points to
357 more detailed information about the CIE.
359 - REMOVED && MERGED: We have merged this CIE with MERGED_WITH,
360 which may not belong to the same input section.
362 - !REMOVED: We have decided to keep this CIE. SEC is the
363 .eh_frame input section that contains the CIE. */
365 struct cie
*full_cie
;
366 struct eh_cie_fde
*merged_with
;
370 /* The offset of the personality data from the start of the CIE,
371 or 0 if the CIE doesn't have any. */
372 unsigned int personality_offset
: 8;
374 /* Length of augmentation. aug_str_len is the length of the
375 string including null terminator. aug_data_len is the length
376 of the rest up to the initial insns. */
377 unsigned int aug_str_len
: 3;
378 unsigned int aug_data_len
: 5;
380 /* True if we have marked relocations associated with this CIE. */
381 unsigned int gc_mark
: 1;
383 /* True if we have decided to turn an absolute LSDA encoding into
384 a PC-relative one. */
385 unsigned int make_lsda_relative
: 1;
387 /* True if we have decided to turn an absolute personality
388 encoding into a PC-relative one. */
389 unsigned int make_per_encoding_relative
: 1;
391 /* True if the CIE contains personality data and if that
392 data uses a PC-relative encoding. Always true when
393 make_per_encoding_relative is. */
394 unsigned int per_encoding_relative
: 1;
396 /* True if the CIE contains personality data aligned to a
397 multiple of eight bytes. */
398 unsigned int per_encoding_aligned8
: 1;
400 /* True if we need to add an 'R' (FDE encoding) entry to the
401 CIE's augmentation data. */
402 unsigned int add_fde_encoding
: 1;
404 /* True if we have merged this CIE with another. */
405 unsigned int merged
: 1;
408 unsigned int pad1
: 9;
411 unsigned int reloc_index
;
414 unsigned int new_offset
;
415 unsigned int fde_encoding
: 8;
416 unsigned int lsda_encoding
: 8;
417 unsigned int lsda_offset
: 8;
419 /* True if this entry represents a CIE, false if it represents an FDE. */
420 unsigned int cie
: 1;
422 /* True if this entry is currently marked for removal. */
423 unsigned int removed
: 1;
425 /* True if we need to add a 'z' (augmentation size) entry to the CIE's
426 augmentation data, and an associated byte to each of the CIE's FDEs. */
427 unsigned int add_augmentation_size
: 1;
429 /* True if we have decided to convert absolute FDE relocations into
430 relative ones. This applies to the first relocation in the FDE,
431 which is against the code that the FDE describes. */
432 unsigned int make_relative
: 1;
435 unsigned int pad1
: 4;
437 unsigned int *set_loc
;
440 struct eh_frame_sec_info
444 struct eh_cie_fde entry
[1];
447 struct eh_frame_array_ent
456 #define DWARF2_EH_HDR 1
457 #define COMPACT_EH_HDR 2
459 /* Endian-neutral code indicating that a function cannot be unwound. */
460 #define COMPACT_EH_CANT_UNWIND_OPCODE 0x015d5d01
462 struct dwarf_eh_frame_hdr_info
465 unsigned int fde_count
;
466 /* TRUE if .eh_frame_hdr should contain the sorted search table.
467 We build it if we successfully read all .eh_frame input sections
468 and recognize them. */
470 struct eh_frame_array_ent
*array
;
473 struct compact_eh_frame_hdr_info
475 unsigned int allocated_entries
;
476 /* eh_frame_entry fragments. */
480 struct eh_frame_hdr_info
483 unsigned int array_count
;
484 bool frame_hdr_is_compact
;
487 struct dwarf_eh_frame_hdr_info dwarf
;
488 struct compact_eh_frame_hdr_info compact
;
493 /* Enum used to identify target specific extensions to the elf_obj_tdata
494 and elf_link_hash_table structures. Note the enums deliberately start
495 from 1 so that we can detect an uninitialized field. The generic value
496 is last so that additions to this enum do not need to modify more than
500 AARCH64_ELF_DATA
= 1,
541 struct elf_sym_strtab
543 Elf_Internal_Sym sym
;
544 unsigned long dest_index
;
547 struct bfd_link_needed_list
549 struct bfd_link_needed_list
*next
;
557 is_solaris
, /* Solaris. */
558 is_vxworks
, /* VxWorks. */
559 is_nacl
/* Native Client. */
562 /* Used by bfd_sym_from_r_symndx to cache a small number of local
564 #define LOCAL_SYM_CACHE_SIZE 32
568 unsigned long indx
[LOCAL_SYM_CACHE_SIZE
];
569 Elf_Internal_Sym sym
[LOCAL_SYM_CACHE_SIZE
];
572 /* ELF linker hash table. */
574 struct elf_link_hash_table
576 struct bfd_link_hash_table root
;
578 /* An identifier used to distinguish different target
579 specific extensions to this structure. */
580 enum elf_target_id hash_table_id
;
582 /* Whether we have created the special dynamic sections required
583 when linking against or generating a shared object. */
584 bool dynamic_sections_created
;
586 /* Whether dynamic relocations are present. */
589 /* True if this target has relocatable executables, so needs dynamic
591 bool is_relocatable_executable
;
593 /* TRUE if there are IFUNC resolvers. */
594 bool ifunc_resolvers
;
596 /* TRUE if DT_PLTGOT is a required dynamic tag. */
597 bool dt_pltgot_required
;
599 /* TRUE if DT_JMPREL is a required dynamic tag. */
600 bool dt_jmprel_required
;
602 /* The BFD used to hold special sections created by the linker.
603 This will be the first BFD found which requires these sections to
607 /* The value to use when initialising got.refcount/offset and
608 plt.refcount/offset in an elf_link_hash_entry. Set to zero when
609 the values are refcounts. Set to init_got_offset/init_plt_offset
610 in size_dynamic_sections when the values may be offsets. */
611 union gotplt_union init_got_refcount
;
612 union gotplt_union init_plt_refcount
;
614 /* The value to use for got.refcount/offset and plt.refcount/offset
615 when the values may be offsets. Normally (bfd_vma) -1. */
616 union gotplt_union init_got_offset
;
617 union gotplt_union init_plt_offset
;
619 /* The number of symbols found in the link which is intended for the
620 mandatory DT_SYMTAB tag (.dynsym section) in .dynamic section. */
621 bfd_size_type dynsymcount
;
622 bfd_size_type local_dynsymcount
;
624 /* The string table of dynamic symbols, which becomes the .dynstr
626 struct elf_strtab_hash
*dynstr
;
628 /* The array size of the symbol string table, which becomes the
630 bfd_size_type strtabsize
;
632 /* The array of strings, which becomes the .strtab section. */
633 struct elf_sym_strtab
*strtab
;
635 /* The number of buckets in the hash table in the .hash section.
636 This is based on the number of dynamic symbols. */
637 bfd_size_type bucketcount
;
639 /* A linked list of DT_NEEDED names found in dynamic objects
640 included in the link. */
641 struct bfd_link_needed_list
*needed
;
643 /* Sections in the output bfd that provides a section symbol
644 to be used by relocations emitted against local symbols.
645 Most targets will not use data_index_section. */
646 asection
*text_index_section
;
647 asection
*data_index_section
;
649 /* The _GLOBAL_OFFSET_TABLE_ symbol. */
650 struct elf_link_hash_entry
*hgot
;
652 /* The _PROCEDURE_LINKAGE_TABLE_ symbol. */
653 struct elf_link_hash_entry
*hplt
;
655 /* The _DYNAMIC symbol. */
656 struct elf_link_hash_entry
*hdynamic
;
658 /* A pointer to information used to merge SEC_MERGE sections. */
661 /* Used to link stabs in sections. */
662 struct stab_info stab_info
;
664 /* Used by eh_frame code when editing .eh_frame. */
665 struct eh_frame_hdr_info eh_info
;
667 /* A linked list of local symbols to be added to .dynsym. */
668 struct elf_link_local_dynamic_entry
*dynlocal
;
670 /* A linked list of DT_RPATH/DT_RUNPATH names found in dynamic
671 objects included in the link. */
672 struct bfd_link_needed_list
*runpath
;
674 /* Cached first output tls section and size of PT_TLS segment. */
676 bfd_size_type tls_size
; /* Bytes. */
678 /* The offset into splt of the PLT entry for the TLS descriptor
679 resolver. Special values are 0, if not necessary (or not found
680 to be necessary yet), and -1 if needed but not determined
684 /* The GOT offset for the lazy trampoline. Communicated to the
685 loader via DT_TLSDESC_GOT. The magic value (bfd_vma) -1
686 indicates an offset is not allocated. */
689 /* Target OS for linker output. */
690 enum elf_target_os target_os
;
692 /* A linked list of dynamic BFD's loaded in the link. */
693 struct elf_link_loaded_list
*dyn_loaded
;
695 /* Small local sym cache. */
696 struct sym_cache sym_cache
;
698 /* Short-cuts to get to dynamic linker sections. */
707 asection
*sreldynrelro
;
716 /* Returns TRUE if the hash table is a struct elf_link_hash_table. */
719 is_elf_hash_table (const struct bfd_link_hash_table
*htab
)
721 return htab
->type
== bfd_link_elf_hash_table
;
724 /* Look up an entry in an ELF linker hash table. */
726 static inline struct elf_link_hash_entry
*
727 elf_link_hash_lookup (struct elf_link_hash_table
*table
, const char *string
,
728 bool create
, bool copy
, bool follow
)
730 if (ENABLE_CHECKING
&& !is_elf_hash_table (&table
->root
))
732 return (struct elf_link_hash_entry
*)
733 bfd_link_hash_lookup (&table
->root
, string
, create
, copy
, follow
);
736 /* Traverse an ELF linker hash table. */
739 elf_link_hash_traverse (struct elf_link_hash_table
*table
,
740 bool (*f
) (struct elf_link_hash_entry
*, void *),
743 if (ENABLE_CHECKING
&& !is_elf_hash_table (&table
->root
))
745 bfd_link_hash_traverse (&table
->root
,
746 (bool (*) (struct bfd_link_hash_entry
*, void *)) f
,
750 /* Get the ELF linker hash table from a link_info structure. */
752 static inline struct elf_link_hash_table
*
753 elf_hash_table (const struct bfd_link_info
*info
)
755 return (struct elf_link_hash_table
*) info
->hash
;
758 static inline enum elf_target_id
759 elf_hash_table_id (const struct elf_link_hash_table
*table
)
761 return table
->hash_table_id
;
764 /* Constant information held for an ELF backend. */
766 struct elf_size_info
{
767 unsigned char sizeof_ehdr
, sizeof_phdr
, sizeof_shdr
;
768 unsigned char sizeof_rel
, sizeof_rela
, sizeof_sym
, sizeof_dyn
, sizeof_note
;
770 /* The size of entries in the .hash section. */
771 unsigned char sizeof_hash_entry
;
773 /* The number of internal relocations to allocate per external
775 unsigned char int_rels_per_ext_rel
;
776 /* We use some fixed size arrays. This should be large enough to
777 handle all back-ends. */
778 #define MAX_INT_RELS_PER_EXT_REL 3
780 unsigned char arch_size
, log_file_align
;
781 unsigned char elfclass
, ev_current
;
782 int (*write_out_phdrs
)
783 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
784 bool (*write_shdrs_and_ehdr
) (bfd
*);
785 bool (*checksum_contents
)
786 (bfd
* , void (*) (const void *, size_t, void *), void *);
788 (bfd
*, asection
*, void *);
789 bool (*swap_symbol_in
)
790 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
791 void (*swap_symbol_out
)
792 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
793 bool (*slurp_reloc_table
)
794 (bfd
*, asection
*, asymbol
**, bool);
795 long (*slurp_symbol_table
)
796 (bfd
*, asymbol
**, bool);
798 (bfd
*, const void *, Elf_Internal_Dyn
*);
800 (bfd
*, const Elf_Internal_Dyn
*, void *);
802 /* This function is called to swap in a REL relocation. If an
803 external relocation corresponds to more than one internal
804 relocation, then all relocations are swapped in at once. */
805 void (*swap_reloc_in
)
806 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
808 /* This function is called to swap out a REL relocation. */
809 void (*swap_reloc_out
)
810 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
812 /* This function is called to swap in a RELA relocation. If an
813 external relocation corresponds to more than one internal
814 relocation, then all relocations are swapped in at once. */
815 void (*swap_reloca_in
)
816 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
818 /* This function is called to swap out a RELA relocation. */
819 void (*swap_reloca_out
)
820 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
823 #define elf_symbol_from(S) \
824 ((((S)->flags & BSF_SYNTHETIC) == 0 \
825 && (S)->the_bfd != NULL \
826 && (S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \
827 && (S)->the_bfd->tdata.elf_obj_data != 0) \
828 ? (elf_symbol_type *) (S) \
831 enum elf_reloc_type_class
{
833 reloc_class_relative
,
839 struct elf_reloc_cookie
841 Elf_Internal_Rela
*rels
, *rel
, *relend
;
842 Elf_Internal_Sym
*locsyms
;
846 struct elf_link_hash_entry
**sym_hashes
;
851 /* The level of IRIX compatibility we're striving for. */
859 /* Mapping of ELF section names and types. */
860 struct bfd_elf_special_section
863 unsigned int prefix_length
;
864 /* 0 means name must match PREFIX exactly.
865 -1 means name must start with PREFIX followed by an arbitrary string.
866 -2 means name must match PREFIX exactly or consist of PREFIX followed
867 by a dot then anything.
868 > 0 means name must start with the first PREFIX_LENGTH chars of
869 PREFIX and finish with the last SUFFIX_LENGTH chars of PREFIX. */
870 signed int suffix_length
;
875 enum action_discarded
881 typedef asection
* (*elf_gc_mark_hook_fn
)
882 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
883 struct elf_link_hash_entry
*, Elf_Internal_Sym
*);
885 enum elf_property_kind
887 /* A new property. */
888 property_unknown
= 0,
889 /* A property ignored by backend. */
891 /* A corrupt property reported by backend. */
893 /* A property should be removed due to property merge. */
895 /* A property which is a number. */
899 typedef struct elf_property
901 unsigned int pr_type
;
902 unsigned int pr_datasz
;
905 /* For property_number, this is a number. */
907 /* Add a new one if elf_property_kind is updated. */
909 enum elf_property_kind pr_kind
;
912 typedef struct elf_property_list
914 struct elf_property_list
*next
;
915 struct elf_property property
;
918 struct bfd_elf_section_reloc_data
;
920 struct elf_backend_data
922 /* The architecture for this backend. */
923 enum bfd_architecture arch
;
925 /* An identifier used to distinguish different target specific
926 extensions to elf_obj_tdata and elf_link_hash_table structures. */
927 enum elf_target_id target_id
;
930 enum elf_target_os target_os
;
932 /* The ELF machine code (EM_xxxx) for this backend. */
933 int elf_machine_code
;
938 /* The maximum page size for this backend. */
941 /* The minimum page size for this backend. An input object will not be
942 considered page aligned unless its sections are correctly aligned for
943 pages at least this large. May be smaller than maxpagesize. */
946 /* The common page size for this backend. */
947 bfd_vma commonpagesize
;
949 /* The value of commonpagesize to use when -z relro for this backend. */
950 bfd_vma relropagesize
;
952 /* The p_align value for this backend. If it is set, p_align of
953 PT_LOAD alignment will be to p_align by default. */
956 /* The BFD flags applied to sections created for dynamic linking. */
957 flagword dynamic_sec_flags
;
959 /* Architecture-specific data for this backend.
960 This is actually a pointer to some type like struct elf_ARCH_data. */
961 const void *arch_data
;
963 /* A function to translate an ELF RELA relocation to a BFD arelent
964 structure. Returns TRUE upon success, FALSE otherwise. */
965 bool (*elf_info_to_howto
)
966 (bfd
*, arelent
*, Elf_Internal_Rela
*);
968 /* A function to translate an ELF REL relocation to a BFD arelent
969 structure. Returns TRUE upon success, FALSE otherwise. */
970 bool (*elf_info_to_howto_rel
)
971 (bfd
*, arelent
*, Elf_Internal_Rela
*);
973 /* A function to determine whether a symbol is global when
974 partitioning the symbol table into local and global symbols.
975 This should be NULL for most targets, in which case the correct
976 thing will be done. MIPS ELF, at least on the Irix 5, has
977 special requirements. */
978 bool (*elf_backend_sym_is_global
)
981 /* The remaining functions are hooks which are called only if they
984 /* A function to permit a backend specific check on whether a
985 particular BFD format is relevant for an object file, and to
986 permit the backend to set any global information it wishes. When
987 this is called elf_elfheader is set, but anything else should be
988 used with caution. If this returns FALSE, the check_format
989 routine will return a bfd_error_wrong_format error. */
990 bool (*elf_backend_object_p
)
993 /* A function to do additional symbol processing when reading the
994 ELF symbol table. This is where any processor-specific special
995 section indices are handled. */
996 void (*elf_backend_symbol_processing
)
999 /* A function to do additional symbol processing after reading the
1000 entire ELF symbol table. */
1001 bool (*elf_backend_symbol_table_processing
)
1002 (bfd
*, elf_symbol_type
*, unsigned int);
1004 /* A function to set the type of the info field. Processor-specific
1005 types should be handled here. */
1006 int (*elf_backend_get_symbol_type
)
1007 (Elf_Internal_Sym
*, int);
1009 /* A function to return the linker hash table entry of a symbol that
1010 might be satisfied by an archive symbol. */
1011 struct bfd_link_hash_entry
* (*elf_backend_archive_symbol_lookup
)
1012 (bfd
*, struct bfd_link_info
*, const char *);
1014 /* Return true if local section symbols should have a non-null st_name.
1015 NULL implies false. */
1016 bool (*elf_backend_name_local_section_symbols
)
1019 /* A function to do additional processing on the ELF section header
1020 just before writing it out. This is used to set the flags and
1021 type fields for some sections, or to actually write out data for
1022 unusual sections. */
1023 bool (*elf_backend_section_processing
)
1024 (bfd
*, Elf_Internal_Shdr
*);
1026 /* A function to handle unusual section types when creating BFD
1027 sections from ELF sections. */
1028 bool (*elf_backend_section_from_shdr
)
1029 (bfd
*, Elf_Internal_Shdr
*, const char *, int);
1031 /* A function to convert machine dependent ELF section header flags to
1032 BFD internal section header flags. */
1033 bool (*elf_backend_section_flags
)
1034 (const Elf_Internal_Shdr
*);
1036 /* A function that returns a struct containing ELF section flags and
1037 type for the given BFD section. */
1038 const struct bfd_elf_special_section
* (*get_sec_type_attr
)
1039 (bfd
*, asection
*);
1041 /* A function to handle unusual program segment types when creating BFD
1042 sections from ELF program segments. */
1043 bool (*elf_backend_section_from_phdr
)
1044 (bfd
*, Elf_Internal_Phdr
*, int, const char *);
1046 /* A function to set up the ELF section header for a BFD section in
1047 preparation for writing it out. This is where the flags and type
1048 fields are set for unusual sections. */
1049 bool (*elf_backend_fake_sections
)
1050 (bfd
*, Elf_Internal_Shdr
*, asection
*);
1052 /* A function to get the ELF section index for a BFD section. If
1053 this returns TRUE, the section was found. If it is a normal ELF
1054 section, *RETVAL should be left unchanged. If it is not a normal
1055 ELF section *RETVAL should be set to the SHN_xxxx index. */
1056 bool (*elf_backend_section_from_bfd_section
)
1057 (bfd
*, asection
*, int *retval
);
1059 /* If this field is not NULL, it is called by the add_symbols phase
1060 of a link just before adding a symbol to the global linker hash
1061 table. It may modify any of the fields as it wishes. If *NAME
1062 is set to NULL, the symbol will be skipped rather than being
1063 added to the hash table. This function is responsible for
1064 handling all processor dependent symbol bindings and section
1065 indices, and must set at least *FLAGS and *SEC for each processor
1066 dependent case; failure to do so will cause a link error. */
1067 bool (*elf_add_symbol_hook
)
1068 (bfd
*abfd
, struct bfd_link_info
*info
, Elf_Internal_Sym
*,
1069 const char **name
, flagword
*flags
, asection
**sec
, bfd_vma
*value
);
1071 /* If this field is not NULL, it is called by the elf_link_output_sym
1072 phase of a link for each symbol which will appear in the object file.
1073 On error, this function returns 0. 1 is returned when the symbol
1074 should be output, 2 is returned when the symbol should be discarded. */
1075 int (*elf_backend_link_output_symbol_hook
)
1076 (struct bfd_link_info
*info
, const char *, Elf_Internal_Sym
*,
1077 asection
*, struct elf_link_hash_entry
*);
1079 /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend
1080 linker the first time it encounters a dynamic object in the link.
1081 This function must create any sections required for dynamic
1082 linking. The ABFD argument is a dynamic object. The .interp,
1083 .dynamic, .dynsym, .dynstr, and .hash functions have already been
1084 created, and this function may modify the section flags if
1085 desired. This function will normally create the .got and .plt
1086 sections, but different backends have different requirements. */
1087 bool (*elf_backend_create_dynamic_sections
)
1088 (bfd
*abfd
, struct bfd_link_info
*info
);
1090 /* When creating a shared library, determine whether to omit the
1091 dynamic symbol for the section. */
1092 bool (*elf_backend_omit_section_dynsym
)
1093 (bfd
*output_bfd
, struct bfd_link_info
*info
, asection
*osec
);
1095 /* Return TRUE if relocations of targets are compatible to the extent
1096 that CHECK_RELOCS will properly process them. PR 4424. */
1097 bool (*relocs_compatible
) (const bfd_target
*, const bfd_target
*);
1099 /* The CHECK_RELOCS function is called after all input files have been
1100 opened. It is called once for each section with relocs of an object
1101 file. The function must look through the relocs and do any special
1102 handling required. This generally means allocating space in the
1103 global offset table, and perhaps allocating space for a reloc. The
1104 relocs are always passed as Rela structures; if the section
1105 actually uses Rel structures, the r_addend field will always be
1107 bool (*check_relocs
)
1108 (bfd
*abfd
, struct bfd_link_info
*info
, asection
*o
,
1109 const Elf_Internal_Rela
*relocs
);
1111 /* The SIZE_RELATIVE_RELOCS function is called to size relative
1112 relocations when mappig sections to segments. */
1113 bool (*size_relative_relocs
)
1114 (struct bfd_link_info
*info
, bool *need_layout
);
1116 /* The FINISH_RELATIVE_RELOCS function is called to finish relative
1117 relocations in bfd_elf_final_link. */
1118 bool (*finish_relative_relocs
)
1119 (struct bfd_link_info
*info
);
1121 /* The CHECK_DIRECTIVES function is called once per input file by
1122 the add_symbols phase of the ELF backend linker. The function
1123 must inspect the bfd and create any additional symbols according
1124 to any custom directives in the bfd. */
1125 bool (*check_directives
)
1126 (bfd
*abfd
, struct bfd_link_info
*info
);
1128 /* The NOTICE_AS_NEEDED function is called as the linker is about to
1129 handle an as-needed lib (ACT = notice_as_needed), and after the
1130 linker has decided to keep the lib (ACT = notice_needed) or when
1131 the lib is not needed (ACT = notice_not_needed). */
1132 bool (*notice_as_needed
)
1133 (bfd
*abfd
, struct bfd_link_info
*info
, enum notice_asneeded_action act
);
1135 /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
1136 linker for every symbol which is defined by a dynamic object and
1137 referenced by a regular object. This is called after all the
1138 input files have been seen, but before the SIZE_DYNAMIC_SECTIONS
1139 function has been called. The hash table entry should be
1140 bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be
1141 defined in a section from a dynamic object. Dynamic object
1142 sections are not included in the final link, and this function is
1143 responsible for changing the value to something which the rest of
1144 the link can deal with. This will normally involve adding an
1145 entry to the .plt or .got or some such section, and setting the
1146 symbol to point to that. */
1147 bool (*elf_backend_adjust_dynamic_symbol
)
1148 (struct bfd_link_info
*info
, struct elf_link_hash_entry
*h
);
1150 /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker
1151 after all the linker input files have been seen but before the
1152 section sizes have been set. This is called after
1153 ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS. */
1154 bool (*elf_backend_always_size_sections
)
1155 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1157 /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend
1158 linker after all the linker input files have been seen but before
1159 the sections sizes have been set. This is called after
1160 ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols.
1161 It is only called when linking against a dynamic object. It must
1162 set the sizes of the dynamic sections, and may fill in their
1163 contents as well. The generic ELF linker can handle the .dynsym,
1164 .dynstr and .hash sections. This function must handle the
1165 .interp section and any sections created by the
1166 CREATE_DYNAMIC_SECTIONS entry point. */
1167 bool (*elf_backend_size_dynamic_sections
)
1168 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1170 /* The STRIP_ZERO_SIZED_DYNAMIC_SECTIONS function is called by the
1171 ELF backend linker to strip zero-sized dynamic sections after
1172 the section sizes have been set. */
1173 bool (*elf_backend_strip_zero_sized_dynamic_sections
)
1174 (struct bfd_link_info
*info
);
1176 /* Set TEXT_INDEX_SECTION and DATA_INDEX_SECTION, the output sections
1177 we keep to use as a base for relocs and symbols. */
1178 void (*elf_backend_init_index_section
)
1179 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1181 /* The RELOCATE_SECTION function is called by the ELF backend linker
1182 to handle the relocations for a section.
1184 The relocs are always passed as Rela structures; if the section
1185 actually uses Rel structures, the r_addend field will always be
1188 This function is responsible for adjust the section contents as
1189 necessary, and (if using Rela relocs and generating a
1190 relocatable output file) adjusting the reloc addend as
1193 This function does not have to worry about setting the reloc
1194 address or the reloc symbol index.
1196 LOCAL_SYMS is a pointer to the swapped in local symbols.
1198 LOCAL_SECTIONS is an array giving the section in the input file
1199 corresponding to the st_shndx field of each local symbol.
1201 The global hash table entry for the global symbols can be found
1202 via elf_sym_hashes (input_bfd).
1204 When generating relocatable output, this function must handle
1205 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
1206 going to be the section symbol corresponding to the output
1207 section, which means that the addend must be adjusted
1210 Returns FALSE on error, TRUE on success, 2 if successful and
1211 relocations should be written for this section. */
1212 int (*elf_backend_relocate_section
)
1213 (bfd
*output_bfd
, struct bfd_link_info
*info
, bfd
*input_bfd
,
1214 asection
*input_section
, bfd_byte
*contents
, Elf_Internal_Rela
*relocs
,
1215 Elf_Internal_Sym
*local_syms
, asection
**local_sections
);
1217 /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend
1218 linker just before it writes a symbol out to the .dynsym section.
1219 The processor backend may make any required adjustment to the
1220 symbol. It may also take the opportunity to set contents of the
1221 dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on
1222 all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called
1223 on those symbols which are defined by a dynamic object. */
1224 bool (*elf_backend_finish_dynamic_symbol
)
1225 (bfd
*output_bfd
, struct bfd_link_info
*info
,
1226 struct elf_link_hash_entry
*h
, Elf_Internal_Sym
*sym
);
1228 /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend
1229 linker just before it writes all the dynamic sections out to the
1230 output file. The FINISH_DYNAMIC_SYMBOL will have been called on
1231 all dynamic symbols. */
1232 bool (*elf_backend_finish_dynamic_sections
)
1233 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1235 /* A function to do any beginning processing needed for the ELF file
1236 before building the ELF headers and computing file positions. */
1237 void (*elf_backend_begin_write_processing
)
1238 (bfd
*, struct bfd_link_info
*);
1240 /* A function to do any final processing needed for the ELF file
1241 before writing it out. */
1242 bool (*elf_backend_final_write_processing
)
1245 /* This function is called by get_program_header_size. It should
1246 return the number of additional program segments which this BFD
1247 will need. It should return -1 on error. */
1248 int (*elf_backend_additional_program_headers
)
1249 (bfd
*, struct bfd_link_info
*);
1251 /* This function is called to modify an existing segment map in a
1252 backend specific fashion. */
1253 bool (*elf_backend_modify_segment_map
)
1254 (bfd
*, struct bfd_link_info
*);
1256 /* This function is called to modify program headers just before
1257 they are written. */
1258 bool (*elf_backend_modify_headers
)
1259 (bfd
*, struct bfd_link_info
*);
1261 /* This function is called to see if the PHDR header should be
1262 checked for validity. */
1263 bool (*elf_backend_allow_non_load_phdr
)
1264 (bfd
*, const Elf_Internal_Phdr
*, unsigned);
1266 /* This function is called before section garbage collection to
1267 mark entry symbol sections. */
1269 (struct bfd_link_info
*);
1271 /* This function is called during section garbage collection to
1272 mark sections that define global symbols. */
1273 bool (*gc_mark_dynamic_ref
)
1274 (struct elf_link_hash_entry
*, void *);
1276 /* This function is called during section gc to discover the section a
1277 particular relocation refers to. */
1278 elf_gc_mark_hook_fn gc_mark_hook
;
1280 /* This function, if defined, is called after the first gc marking pass
1281 to allow the backend to mark additional sections. */
1282 bool (*gc_mark_extra_sections
)
1283 (struct bfd_link_info
*, elf_gc_mark_hook_fn
);
1285 /* This function is called to initialise ELF file header info.
1286 Customised versions can modify things like the OS and ABI version. */
1287 bool (*elf_backend_init_file_header
)
1288 (bfd
*, struct bfd_link_info
*);
1290 /* This function, if defined, prints a symbol to file and returns the
1291 name of the symbol to be printed. It should return NULL to fall
1292 back to default symbol printing. */
1293 const char *(*elf_backend_print_symbol_all
)
1294 (bfd
*, void *, asymbol
*);
1296 /* This function, if defined, is called after all local symbols and
1297 global symbols converted to locals are emitted into the symtab
1298 section. It allows the backend to emit special local symbols
1299 not handled in the hash table. */
1300 bool (*elf_backend_output_arch_local_syms
)
1301 (bfd
*, struct bfd_link_info
*, void *,
1302 int (*) (void *, const char *, Elf_Internal_Sym
*, asection
*,
1303 struct elf_link_hash_entry
*));
1305 /* This function, if defined, is called after all symbols are emitted
1306 into the symtab section. It allows the backend to emit special
1307 global symbols not handled in the hash table. */
1308 bool (*elf_backend_output_arch_syms
)
1309 (bfd
*, struct bfd_link_info
*, void *,
1310 int (*) (void *, const char *, Elf_Internal_Sym
*, asection
*,
1311 struct elf_link_hash_entry
*));
1313 /* Filter what symbols of the output file to include in the import
1314 library if one is created. */
1315 unsigned int (*elf_backend_filter_implib_symbols
)
1316 (bfd
*, struct bfd_link_info
*, asymbol
**, long);
1318 /* Copy any information related to dynamic linking from a pre-existing
1319 symbol to a newly created symbol. Also called to copy flags and
1320 other back-end info to a weakdef, in which case the symbol is not
1321 newly created and plt/got refcounts and dynamic indices should not
1323 void (*elf_backend_copy_indirect_symbol
)
1324 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
1325 struct elf_link_hash_entry
*);
1327 /* Modify any information related to dynamic linking such that the
1328 symbol is not exported. */
1329 void (*elf_backend_hide_symbol
)
1330 (struct bfd_link_info
*, struct elf_link_hash_entry
*, bool);
1332 /* A function to do additional symbol fixup, called by
1333 _bfd_elf_fix_symbol_flags. */
1334 bool (*elf_backend_fixup_symbol
)
1335 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
1337 /* Merge the backend specific symbol attribute. */
1338 void (*elf_backend_merge_symbol_attribute
)
1339 (struct elf_link_hash_entry
*, unsigned int, bool, bool);
1341 /* This function, if defined, will return a string containing the
1342 name of a target-specific dynamic tag. */
1343 char *(*elf_backend_get_target_dtag
)
1346 /* Decide whether an undefined symbol is special and can be ignored.
1347 This is the case for OPTIONAL symbols on IRIX. */
1348 bool (*elf_backend_ignore_undef_symbol
)
1349 (struct elf_link_hash_entry
*);
1351 /* Emit relocations. Overrides default routine for emitting relocs,
1352 except during a relocatable link, or if all relocs are being emitted. */
1353 bool (*elf_backend_emit_relocs
)
1354 (bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*,
1355 struct elf_link_hash_entry
**);
1357 /* Update relocations. It is allowed to change the number and the order.
1358 In such a case hashes should be invalidated. */
1359 void (*elf_backend_update_relocs
)
1360 (asection
*, struct bfd_elf_section_reloc_data
*);
1362 /* Count relocations. Not called for relocatable links
1363 or if all relocs are being preserved in the output. */
1364 unsigned int (*elf_backend_count_relocs
)
1365 (struct bfd_link_info
*, asection
*);
1367 /* Count additionals relocations. Called for relocatable links if
1368 additional relocations needs to be created. */
1369 unsigned int (*elf_backend_count_additional_relocs
)
1372 /* Say whether to sort relocs output by ld -r and ld --emit-relocs,
1373 by r_offset. If NULL, default to true. */
1374 bool (*sort_relocs_p
)
1377 /* This function, if defined, is called when an NT_PRSTATUS note is found
1379 bool (*elf_backend_grok_prstatus
)
1380 (bfd
*, Elf_Internal_Note
*);
1382 /* This function, if defined, is called when an NT_PSINFO or NT_PRPSINFO
1383 note is found in a core file. */
1384 bool (*elf_backend_grok_psinfo
)
1385 (bfd
*, Elf_Internal_Note
*);
1387 /* This function, if defined, is called when a "FreeBSD" NT_PRSTATUS
1388 note is found in a core file. */
1389 bool (*elf_backend_grok_freebsd_prstatus
)
1390 (bfd
*, Elf_Internal_Note
*);
1392 /* This function, if defined, is called to write a note to a corefile. */
1393 char *(*elf_backend_write_core_note
)
1394 (bfd
*abfd
, char *buf
, int *bufsiz
, int note_type
, ...);
1396 /* This function, if defined, is called to convert target-specific
1397 section flag names into hex values. */
1398 flagword (*elf_backend_lookup_section_flags_hook
)
1401 /* This function returns class of a reloc type. */
1402 enum elf_reloc_type_class (*elf_backend_reloc_type_class
)
1403 (const struct bfd_link_info
*, const asection
*, const Elf_Internal_Rela
*);
1405 /* This function, if defined, removes information about discarded functions
1406 from other sections which mention them. */
1407 bool (*elf_backend_discard_info
)
1408 (bfd
*, struct elf_reloc_cookie
*, struct bfd_link_info
*);
1410 /* This function, if defined, signals that the function above has removed
1411 the discarded relocations for this section. */
1412 bool (*elf_backend_ignore_discarded_relocs
)
1415 /* What to do when ld finds relocations against symbols defined in
1416 discarded sections. */
1417 unsigned int (*action_discarded
)
1420 /* This function returns the width of FDE pointers in bytes, or 0 if
1421 that can't be determined for some reason. The default definition
1422 goes by the bfd's EI_CLASS. */
1423 unsigned int (*elf_backend_eh_frame_address_size
)
1424 (bfd
*, const asection
*);
1426 /* These functions tell elf-eh-frame whether to attempt to turn
1427 absolute or lsda encodings into pc-relative ones. The default
1428 definition enables these transformations. */
1429 bool (*elf_backend_can_make_relative_eh_frame
)
1430 (bfd
*, struct bfd_link_info
*, asection
*);
1431 bool (*elf_backend_can_make_lsda_relative_eh_frame
)
1432 (bfd
*, struct bfd_link_info
*, asection
*);
1434 /* This function returns an encoding after computing the encoded
1435 value (and storing it in ENCODED) for the given OFFSET into OSEC,
1436 to be stored in at LOC_OFFSET into the LOC_SEC input section.
1437 The default definition chooses a 32-bit PC-relative encoding. */
1438 bfd_byte (*elf_backend_encode_eh_address
)
1439 (bfd
*abfd
, struct bfd_link_info
*info
,
1440 asection
*osec
, bfd_vma offset
,
1441 asection
*loc_sec
, bfd_vma loc_offset
,
1444 /* This function, if defined, may write out the given section.
1445 Returns TRUE if it did so and FALSE if the caller should. */
1446 bool (*elf_backend_write_section
)
1447 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
1449 /* This function, if defined, returns TRUE if it is section symbols
1450 only that are considered local for the purpose of partitioning the
1451 symbol table into local and global symbols. This should be NULL
1452 for most targets, in which case the correct thing will be done.
1453 MIPS ELF, at least on the Irix 5, has special requirements. */
1454 bool (*elf_backend_elfsym_local_is_section
)
1457 /* The level of IRIX compatibility we're striving for.
1458 MIPS ELF specific function. */
1459 irix_compat_t (*elf_backend_mips_irix_compat
)
1462 reloc_howto_type
*(*elf_backend_mips_rtype_to_howto
)
1463 (bfd
*, unsigned int, bool);
1465 /* The swapping table to use when dealing with ECOFF information.
1466 Used for the MIPS ELF .mdebug section. */
1467 const struct ecoff_debug_swap
*elf_backend_ecoff_debug_swap
;
1469 /* This function implements `bfd_elf_bfd_from_remote_memory';
1470 see elf.c, elfcode.h. */
1471 bfd
*(*elf_backend_bfd_from_remote_memory
)
1472 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
1473 int (*target_read_memory
) (bfd_vma vma
, bfd_byte
*myaddr
,
1474 bfd_size_type len
));
1476 bool (*elf_backend_core_find_build_id
) (bfd
*, bfd_vma
);
1478 /* This function is used by `_bfd_elf_get_synthetic_symtab';
1480 bfd_vma (*plt_sym_val
) (bfd_vma
, const asection
*, const arelent
*);
1482 /* Is symbol defined in common section? */
1483 bool (*common_definition
) (Elf_Internal_Sym
*);
1485 /* Return a common section index for section. */
1486 unsigned int (*common_section_index
) (asection
*);
1488 /* Return a common section for section. */
1489 asection
*(*common_section
) (asection
*);
1491 /* Return TRUE if we can merge 2 definitions. */
1492 bool (*merge_symbol
) (struct elf_link_hash_entry
*,
1493 const Elf_Internal_Sym
*, asection
**,
1495 bfd
*, const asection
*);
1497 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
1498 bool (*elf_hash_symbol
) (struct elf_link_hash_entry
*);
1500 /* If non-NULL, called to register the location of XLAT_LOC within
1501 .MIPS.xhash at which real final dynindx for H will be written.
1502 If XLAT_LOC is zero, the symbol is not included in
1503 .MIPS.xhash and no dynindx will be written. */
1504 void (*record_xhash_symbol
)
1505 (struct elf_link_hash_entry
*h
, bfd_vma xlat_loc
);
1507 /* Return TRUE if type is a function symbol type. */
1508 bool (*is_function_type
) (unsigned int type
);
1510 /* If the ELF symbol SYM might be a function in SEC, return the
1511 function size and set *CODE_OFF to the function's entry point,
1512 otherwise return zero. */
1513 bfd_size_type (*maybe_function_sym
) (const asymbol
*sym
, asection
*sec
,
1516 /* Given NAME, the name of a relocation section stripped of its
1517 .rel/.rela prefix, return the section in ABFD to which the
1518 relocations apply. */
1519 asection
*(*get_reloc_section
) (bfd
*abfd
, const char *name
);
1521 /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
1522 has a type >= SHT_LOOS. Returns TRUE if the fields were initialised,
1523 FALSE otherwise. Can be called multiple times for a given section,
1524 until it returns TRUE. Most of the times it is called ISECTION will be
1525 set to an input section that might be associated with the output section.
1526 The last time that it is called, ISECTION will be set to NULL. */
1527 bool (*elf_backend_copy_special_section_fields
)
1528 (const bfd
*ibfd
, bfd
*obfd
, const Elf_Internal_Shdr
*isection
,
1529 Elf_Internal_Shdr
*osection
);
1531 /* Used to handle bad SHF_LINK_ORDER input. */
1532 void (*link_order_error_handler
) (const char *, ...);
1534 /* Name of the PLT relocation section. */
1535 const char *relplt_name
;
1537 /* Alternate EM_xxxx machine codes for this backend. */
1538 int elf_machine_alt1
;
1539 int elf_machine_alt2
;
1541 const struct elf_size_info
*s
;
1543 /* An array of target specific special sections. */
1544 const struct bfd_elf_special_section
*special_sections
;
1546 /* The size in bytes of the header for the GOT. This includes the
1547 so-called reserved entries on some systems. */
1548 bfd_vma got_header_size
;
1550 /* The size of the GOT entry for the symbol pointed to by H if non-NULL,
1551 otherwise by the local symbol with index SYMNDX in IBFD. */
1552 bfd_vma (*got_elt_size
) (bfd
*, struct bfd_link_info
*,
1553 struct elf_link_hash_entry
*h
,
1554 bfd
*ibfd
, unsigned long symndx
);
1556 /* The vendor name to use for a processor-standard attributes section. */
1557 const char *obj_attrs_vendor
;
1559 /* The section name to use for a processor-standard attributes section. */
1560 const char *obj_attrs_section
;
1562 /* Return 1, 2 or 3 to indicate what type of arguments a
1563 processor-specific tag takes. */
1564 int (*obj_attrs_arg_type
) (int);
1566 /* The section type to use for an attributes section. */
1567 unsigned int obj_attrs_section_type
;
1569 /* This function determines the order in which any attributes are
1570 written. It must be defined for input in the range
1571 LEAST_KNOWN_OBJ_ATTRIBUTE..NUM_KNOWN_OBJ_ATTRIBUTES-1 (this range
1572 is used in order to make unity easy). The returned value is the
1573 actual tag number to place in the input position. */
1574 int (*obj_attrs_order
) (int);
1576 /* Handle merging unknown attributes; either warn and return TRUE,
1577 or give an error and return FALSE. */
1578 bool (*obj_attrs_handle_unknown
) (bfd
*, int);
1580 /* Parse GNU properties. Return the property kind. If the property
1581 is corrupt, issue an error message and return property_corrupt. */
1582 enum elf_property_kind (*parse_gnu_properties
) (bfd
*, unsigned int,
1586 /* Merge GNU properties. Return TRUE if property is updated. */
1587 bool (*merge_gnu_properties
) (struct bfd_link_info
*, bfd
*, bfd
*,
1588 elf_property
*, elf_property
*);
1590 /* Set up GNU properties. */
1591 bfd
*(*setup_gnu_properties
) (struct bfd_link_info
*);
1593 /* Fix up GNU properties. */
1594 void (*fixup_gnu_properties
) (struct bfd_link_info
*,
1595 elf_property_list
**);
1597 /* Encoding used for compact EH tables. */
1598 int (*compact_eh_encoding
) (struct bfd_link_info
*);
1600 /* Opcode representing no unwind. */
1601 int (*cant_unwind_opcode
) (struct bfd_link_info
*);
1603 /* Called when emitting an ELF symbol whoes input version had an
1604 ST_SHNDX field set to a value in the range SHN_LOPROC..SHN_HIOS.
1605 Returns the value to be installed in the ST_SHNDX field of the
1606 emitted symbol. If not defined, the value is left unchanged. */
1607 unsigned int (*symbol_section_index
) (bfd
*, elf_symbol_type
*);
1609 /* Called when a section has extra reloc sections. */
1610 bool (*init_secondary_reloc_section
) (bfd
*, Elf_Internal_Shdr
*,
1611 const char *, unsigned int);
1613 /* Called when after loading the normal relocs for a section. */
1614 bool (*slurp_secondary_relocs
) (bfd
*, asection
*, asymbol
**, bool);
1616 /* Called after writing the normal relocs for a section. */
1617 bool (*write_secondary_relocs
) (bfd
*, asection
*);
1619 /* This is non-zero if static TLS segments require a special alignment. */
1620 unsigned static_tls_alignment
;
1622 /* Alignment for the PT_GNU_STACK segment. */
1623 unsigned stack_align
;
1625 /* Flag bits to assign to a section of type SHT_STRTAB. */
1626 unsigned long elf_strtab_flags
;
1628 /* This is TRUE if the linker should act like collect and gather
1629 global constructors and destructors by name. This is TRUE for
1630 MIPS ELF because the Irix 5 tools can not handle the .init
1632 unsigned collect
: 1;
1634 /* This is TRUE if the linker should ignore changes to the type of a
1635 symbol. This is TRUE for MIPS ELF because some Irix 5 objects
1636 record undefined functions as STT_OBJECT although the definitions
1638 unsigned type_change_ok
: 1;
1640 /* Whether the backend may use REL relocations. (Some backends use
1641 both REL and RELA relocations, and this flag is set for those
1643 unsigned may_use_rel_p
: 1;
1645 /* Whether the backend may use RELA relocations. (Some backends use
1646 both REL and RELA relocations, and this flag is set for those
1648 unsigned may_use_rela_p
: 1;
1650 /* Whether the default relocation type is RELA. If a backend with
1651 this flag set wants REL relocations for a particular section,
1652 it must note that explicitly. Similarly, if this flag is clear,
1653 and the backend wants RELA relocations for a particular
1655 unsigned default_use_rela_p
: 1;
1657 /* True if PLT and copy relocations should be RELA by default. */
1658 unsigned rela_plts_and_copies_p
: 1;
1660 /* Set if RELA relocations for a relocatable link can be handled by
1661 generic code. Backends that set this flag need do nothing in the
1662 backend relocate_section routine for relocatable linking. */
1663 unsigned rela_normal
: 1;
1665 /* Set if DT_REL/DT_RELA/DT_RELSZ/DT_RELASZ should not include PLT
1667 unsigned dtrel_excludes_plt
: 1;
1669 /* TRUE if addresses "naturally" sign extend. This is used when
1670 swapping in from Elf32 when BFD64. */
1671 unsigned sign_extend_vma
: 1;
1673 unsigned want_got_plt
: 1;
1674 unsigned plt_readonly
: 1;
1675 unsigned want_plt_sym
: 1;
1676 unsigned plt_not_loaded
: 1;
1677 unsigned plt_alignment
: 4;
1678 unsigned can_gc_sections
: 1;
1679 unsigned can_refcount
: 1;
1680 unsigned want_got_sym
: 1;
1681 unsigned want_dynbss
: 1;
1682 unsigned want_dynrelro
: 1;
1684 /* Targets which do not support physical addressing often require
1685 that the p_paddr field in the section header to be set to zero.
1686 This field indicates whether this behavior is required. */
1687 unsigned want_p_paddr_set_to_zero
: 1;
1689 /* Target has broken hardware and/or kernel that requires pages not
1690 to be mapped twice with different permissions. */
1691 unsigned no_page_alias
: 1;
1693 /* True if an object file lacking a .note.GNU-stack section
1694 should be assumed to be requesting exec stack. At least one
1695 other file in the link needs to have a .note.GNU-stack section
1696 for a PT_GNU_STACK segment to be created. */
1697 unsigned default_execstack
: 1;
1699 /* True if elf_section_data(sec)->this_hdr.contents is sec->rawsize
1700 in length rather than sec->size in length, if sec->rawsize is
1701 non-zero and smaller than sec->size. */
1702 unsigned caches_rawsize
: 1;
1704 /* Address of protected data defined in the shared library may be
1705 external, i.e., due to copy relocation. */
1706 unsigned extern_protected_data
: 1;
1708 /* True if `_bfd_elf_link_renumber_dynsyms' must be called even for
1710 unsigned always_renumber_dynsyms
: 1;
1712 /* True if the 32-bit Linux PRPSINFO structure's `pr_uid' and `pr_gid'
1713 members use a 16-bit data type. */
1714 unsigned linux_prpsinfo32_ugid16
: 1;
1716 /* True if the 64-bit Linux PRPSINFO structure's `pr_uid' and `pr_gid'
1717 members use a 16-bit data type. */
1718 unsigned linux_prpsinfo64_ugid16
: 1;
1721 /* Information about reloc sections associated with a bfd_elf_section_data
1723 struct bfd_elf_section_reloc_data
1725 /* The ELF header for the reloc section associated with this
1727 Elf_Internal_Shdr
*hdr
;
1728 /* The number of relocations currently assigned to HDR. */
1730 /* The ELF section number of the reloc section. Only used for an
1733 /* Used by the backend linker to store the symbol hash table entries
1734 associated with relocs against global symbols. */
1735 struct elf_link_hash_entry
**hashes
;
1738 /* Information stored for each BFD section in an ELF file. This
1739 structure is allocated by elf_new_section_hook. */
1741 struct bfd_elf_section_data
1743 /* The ELF header for this section. */
1744 Elf_Internal_Shdr this_hdr
;
1746 /* INPUT_SECTION_FLAGS if specified in the linker script. */
1747 struct flag_info
*section_flag_info
;
1749 /* Information about the REL and RELA reloc sections associated
1750 with this section, if any. */
1751 struct bfd_elf_section_reloc_data rel
, rela
;
1753 /* The ELF section number of this section. */
1756 /* Used by the backend linker when generating a shared library to
1757 record the dynamic symbol index for a section symbol
1758 corresponding to this section. A value of 0 means that there is
1759 no dynamic symbol for this section. */
1762 /* A pointer to the linked-to section for SHF_LINK_ORDER. */
1763 asection
*linked_to
;
1765 /* A pointer to the swapped relocs. If the section uses REL relocs,
1766 rather than RELA, all the r_addend fields will be zero. This
1767 pointer may be NULL. It is used by the backend linker. */
1768 Elf_Internal_Rela
*relocs
;
1770 /* A pointer to a linked list tracking dynamic relocs copied for
1774 /* A pointer to the bfd section used for dynamic relocs. */
1778 /* Group name, if this section is a member of a group. */
1781 /* Group signature sym, if this is the SHT_GROUP section. */
1782 struct bfd_symbol
*id
;
1785 /* For a member of a group, points to the SHT_GROUP section.
1786 NULL for the SHT_GROUP section itself and non-group sections. */
1787 asection
*sec_group
;
1789 /* A linked list of member sections in the group. Circular when used by
1790 the linker. For the SHT_GROUP section, points at first member. */
1791 asection
*next_in_group
;
1793 /* The FDEs associated with this section. The u.fde.next_in_section
1794 field acts as a chain pointer. */
1795 struct eh_cie_fde
*fde_list
;
1797 /* Link from a text section to its .eh_frame_entry section. */
1798 asection
*eh_frame_entry
;
1800 /* TRUE if the section has secondary reloc sections associated with it.
1801 FIXME: In the future it might be better to change this into a list
1802 of secondary reloc sections, making lookup easier and faster. */
1803 bool has_secondary_relocs
;
1805 /* A pointer used for various section optimizations. */
1809 #define elf_section_data(sec) ((struct bfd_elf_section_data*)(sec)->used_by_bfd)
1810 #define elf_linked_to_section(sec) (elf_section_data(sec)->linked_to)
1811 #define elf_section_type(sec) (elf_section_data(sec)->this_hdr.sh_type)
1812 #define elf_section_flags(sec) (elf_section_data(sec)->this_hdr.sh_flags)
1813 #define elf_section_info(sec) (elf_section_data(sec)->this_hdr.sh_info)
1814 #define elf_group_name(sec) (elf_section_data(sec)->group.name)
1815 #define elf_group_id(sec) (elf_section_data(sec)->group.id)
1816 #define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group)
1817 #define elf_fde_list(sec) (elf_section_data(sec)->fde_list)
1818 #define elf_sec_group(sec) (elf_section_data(sec)->sec_group)
1819 #define elf_section_eh_frame_entry(sec) (elf_section_data(sec)->eh_frame_entry)
1821 #define xvec_get_elf_backend_data(xvec) \
1822 ((const struct elf_backend_data *) (xvec)->backend_data)
1824 #define get_elf_backend_data(abfd) \
1825 xvec_get_elf_backend_data ((abfd)->xvec)
1827 /* The least object attributes (within an attributes subsection) known
1828 for any target. Some code assumes that the value 0 is not used and
1829 the field for that attribute can instead be used as a marker to
1830 indicate that attributes have been initialized. */
1831 #define LEAST_KNOWN_OBJ_ATTRIBUTE 2
1833 /* The maximum number of known object attributes for any target. */
1834 #define NUM_KNOWN_OBJ_ATTRIBUTES 77
1836 /* The value of an object attribute. The type indicates whether the attribute
1837 holds and integer, a string, or both. It can also indicate that there can
1838 be no default (i.e. all values must be written to file, even zero), or
1839 that the value is in error and should not be written to file. */
1841 typedef struct obj_attribute
1843 #define ATTR_TYPE_FLAG_INT_VAL (1 << 0)
1844 #define ATTR_TYPE_FLAG_STR_VAL (1 << 1)
1845 #define ATTR_TYPE_FLAG_NO_DEFAULT (1 << 2)
1846 #define ATTR_TYPE_FLAG_ERROR (1 << 3)
1848 #define ATTR_TYPE_HAS_INT_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_INT_VAL)
1849 #define ATTR_TYPE_HAS_STR_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_STR_VAL)
1850 #define ATTR_TYPE_HAS_NO_DEFAULT(TYPE) ((TYPE) & ATTR_TYPE_FLAG_NO_DEFAULT)
1851 #define ATTR_TYPE_HAS_ERROR(TYPE) ((TYPE) & ATTR_TYPE_FLAG_ERROR)
1858 typedef struct obj_attribute_list
1860 struct obj_attribute_list
*next
;
1863 } obj_attribute_list
;
1865 /* Object attributes may either be defined by the processor ABI, index
1866 OBJ_ATTR_PROC in the *_obj_attributes arrays, or be GNU-specific
1867 (and possibly also processor-specific), index OBJ_ATTR_GNU. */
1868 #define OBJ_ATTR_PROC 0
1869 #define OBJ_ATTR_GNU 1
1870 #define OBJ_ATTR_FIRST OBJ_ATTR_PROC
1871 #define OBJ_ATTR_LAST OBJ_ATTR_GNU
1873 /* The following object attribute tags are taken as generic, for all
1874 targets and for "gnu" where there is no target standard. */
1881 Tag_compatibility
= 32
1884 /* The following struct stores information about every SystemTap section
1885 found in the object file. */
1888 struct sdt_note
*next
;
1893 /* tdata information grabbed from an elf core file. */
1894 struct core_elf_obj_tdata
1903 /* Extra tdata information held for output ELF BFDs. */
1904 struct output_elf_obj_tdata
1906 struct elf_segment_map
*seg_map
;
1907 struct elf_strtab_hash
*strtab_ptr
;
1909 /* STT_SECTION symbols for each section */
1910 asymbol
**section_syms
;
1912 /* Used to determine if PT_GNU_EH_FRAME segment header should be
1914 asection
*eh_frame_hdr
;
1916 /* NT_GNU_BUILD_ID note type info. */
1919 bool (*after_write_object_contents
) (bfd
*);
1924 /* Records the result of `get_program_header_size'. */
1925 bfd_size_type program_header_size
;
1927 /* Used when laying out sections. */
1928 file_ptr next_file_pos
;
1930 /* Linker information. */
1931 struct bfd_link_info
*link_info
;
1933 unsigned int num_section_syms
;
1934 unsigned int shstrtab_section
, strtab_section
;
1936 /* Segment flags for the PT_GNU_STACK segment. */
1937 unsigned int stack_flags
;
1939 /* Used to determine if the e_flags field has been initialized */
1943 /* Indicate if the bfd contains SHF_GNU_MBIND/SHF_GNU_RETAIN sections or
1944 symbols that have the STT_GNU_IFUNC symbol type or STB_GNU_UNIQUE
1945 binding. Used to set the osabi field in the ELF header structure. */
1948 elf_gnu_osabi_mbind
= 1 << 0,
1949 elf_gnu_osabi_ifunc
= 1 << 1,
1950 elf_gnu_osabi_unique
= 1 << 2,
1951 elf_gnu_osabi_retain
= 1 << 3,
1954 typedef struct elf_section_list
1956 Elf_Internal_Shdr hdr
;
1958 struct elf_section_list
* next
;
1961 enum dynamic_lib_link_class
{
1965 DYN_NO_ADD_NEEDED
= 4,
1969 /* Some private data is stashed away for future use using the tdata pointer
1970 in the bfd structure. */
1972 struct elf_obj_tdata
1974 Elf_Internal_Ehdr elf_header
[1]; /* Actual data, but ref like ptr */
1975 Elf_Internal_Shdr
**elf_sect_ptr
;
1976 Elf_Internal_Phdr
*phdr
;
1977 Elf_Internal_Shdr symtab_hdr
;
1978 Elf_Internal_Shdr shstrtab_hdr
;
1979 Elf_Internal_Shdr strtab_hdr
;
1980 Elf_Internal_Shdr dynsymtab_hdr
;
1981 Elf_Internal_Shdr dynstrtab_hdr
;
1982 Elf_Internal_Shdr dynversym_hdr
;
1983 Elf_Internal_Shdr dynverref_hdr
;
1984 Elf_Internal_Shdr dynverdef_hdr
;
1985 elf_section_list
* symtab_shndx_list
;
1986 bfd_vma gp
; /* The gp value */
1987 unsigned int gp_size
; /* The gp size */
1988 unsigned int num_elf_sections
; /* elf_sect_ptr size */
1989 unsigned char *being_created
;
1991 /* A mapping from external symbols to entries in the linker hash
1992 table, used when linking. This is indexed by the symbol index
1993 minus the sh_info field of the symbol table header. */
1994 struct elf_link_hash_entry
**sym_hashes
;
1996 /* Track usage and final offsets of GOT entries for local symbols.
1997 This array is indexed by symbol index. Elements are used
1998 identically to "got" in struct elf_link_hash_entry. */
2001 bfd_signed_vma
*refcounts
;
2003 struct got_entry
**ents
;
2006 /* The linker ELF emulation code needs to let the backend ELF linker
2007 know what filename should be used for a dynamic object if the
2008 dynamic object is found using a search. The emulation code then
2009 sometimes needs to know what name was actually used. Until the
2010 file has been added to the linker symbol table, this field holds
2011 the name the linker wants. After it has been added, it holds the
2012 name actually used, which will be the DT_SONAME entry if there is
2014 const char *dt_name
;
2016 /* The linker emulation needs to know what audit libs
2017 are used by a dynamic object. */
2018 const char *dt_audit
;
2020 /* Used by find_nearest_line entry point. */
2023 /* A place to stash dwarf1 info for this bfd. */
2024 struct dwarf1_debug
*dwarf1_find_line_info
;
2026 /* A place to stash dwarf2 info for this bfd. */
2027 void *dwarf2_find_line_info
;
2029 /* Stash away info for yet another find line/function variant. */
2030 void *elf_find_function_cache
;
2032 /* Number of symbol version definitions we are about to emit. */
2033 unsigned int cverdefs
;
2035 /* Number of symbol version references we are about to emit. */
2036 unsigned int cverrefs
;
2038 /* Symbol version definitions in external objects. */
2039 Elf_Internal_Verdef
*verdef
;
2041 /* Symbol version references to external objects. */
2042 Elf_Internal_Verneed
*verref
;
2044 /* A pointer to the .eh_frame section. */
2045 asection
*eh_frame_section
;
2047 /* Symbol buffer. */
2050 /* List of GNU properties. Will be updated by setup_gnu_properties
2051 after all input GNU properties are merged for output. */
2052 elf_property_list
*properties
;
2054 obj_attribute known_obj_attributes
[2][NUM_KNOWN_OBJ_ATTRIBUTES
];
2055 obj_attribute_list
*other_obj_attributes
[2];
2057 /* Linked-list containing information about every Systemtap section
2058 found in the object file. Each section corresponds to one entry
2060 struct sdt_note
*sdt_note_head
;
2062 Elf_Internal_Shdr
**group_sect_ptr
;
2063 unsigned int num_group
;
2065 /* Index into group_sect_ptr, updated by setup_group when finding a
2066 section's group. Used to optimize subsequent group searches. */
2067 unsigned int group_search_offset
;
2069 unsigned int symtab_section
, dynsymtab_section
;
2070 unsigned int dynversym_section
, dynverdef_section
, dynverref_section
;
2072 /* An identifier used to distinguish different target
2073 specific extensions to this structure. */
2074 ENUM_BITFIELD (elf_target_id
) object_id
: 6;
2076 /* Whether a dyanmic object was specified normally on the linker
2077 command line, or was specified when --as-needed was in effect,
2078 or was found via a DT_NEEDED entry. */
2079 ENUM_BITFIELD (dynamic_lib_link_class
) dyn_lib_class
: 4;
2081 /* Whether the bfd uses OS specific bits that require ELFOSABI_GNU. */
2082 ENUM_BITFIELD (elf_gnu_osabi
) has_gnu_osabi
: 4;
2084 /* Whether if the bfd contains the GNU_PROPERTY_NO_COPY_ON_PROTECTED
2086 unsigned int has_no_copy_on_protected
: 1;
2088 /* Whether if the bfd contains the
2089 GNU_PROPERTY_1_NEEDED_INDIRECT_EXTERN_ACCESS property. */
2090 unsigned int has_indirect_extern_access
: 1;
2092 /* Irix 5 often screws up the symbol table, sorting local symbols
2093 after global symbols. This flag is set if the symbol table in
2094 this BFD appears to be screwed up. If it is, we ignore the
2095 sh_info field in the symbol table header, and always read all the
2097 unsigned int bad_symtab
: 1;
2099 /* Set if DT_FLAGS_1 has DF_1_PIE set. */
2100 unsigned int is_pie
: 1;
2102 /* Information grabbed from an elf core file. */
2103 struct core_elf_obj_tdata
*core
;
2105 /* More information held for output ELF BFDs. */
2106 struct output_elf_obj_tdata
*o
;
2109 #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
2111 #define elf_object_id(bfd) (elf_tdata(bfd) -> object_id)
2112 #define elf_program_header_size(bfd) (elf_tdata(bfd) -> o->program_header_size)
2113 #define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header)
2114 #define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr)
2115 #define elf_numsections(bfd) (elf_tdata(bfd) -> num_elf_sections)
2116 #define elf_seg_map(bfd) (elf_tdata(bfd) -> o->seg_map)
2117 #define elf_link_info(bfd) (elf_tdata(bfd) -> o->link_info)
2118 #define elf_next_file_pos(bfd) (elf_tdata(bfd) -> o->next_file_pos)
2119 #define elf_eh_frame_hdr(bfd) (elf_tdata(bfd) -> o->eh_frame_hdr)
2120 #define elf_stack_flags(bfd) (elf_tdata(bfd) -> o->stack_flags)
2121 #define elf_shstrtab(bfd) (elf_tdata(bfd) -> o->strtab_ptr)
2122 #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section)
2123 #define elf_symtab_shndx_list(bfd) (elf_tdata(bfd) -> symtab_shndx_list)
2124 #define elf_strtab_sec(bfd) (elf_tdata(bfd) -> o->strtab_section)
2125 #define elf_shstrtab_sec(bfd) (elf_tdata(bfd) -> o->shstrtab_section)
2126 #define elf_symtab_hdr(bfd) (elf_tdata(bfd) -> symtab_hdr)
2127 #define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section)
2128 #define elf_dynversym(bfd) (elf_tdata(bfd) -> dynversym_section)
2129 #define elf_dynverdef(bfd) (elf_tdata(bfd) -> dynverdef_section)
2130 #define elf_dynverref(bfd) (elf_tdata(bfd) -> dynverref_section)
2131 #define elf_eh_frame_section(bfd) \
2132 (elf_tdata(bfd) -> eh_frame_section)
2133 #define elf_section_syms(bfd) (elf_tdata(bfd) -> o->section_syms)
2134 #define elf_num_section_syms(bfd) (elf_tdata(bfd) -> o->num_section_syms)
2135 #define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
2136 #define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
2137 #define elf_gp(bfd) (elf_tdata(bfd) -> gp)
2138 #define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size)
2139 #define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes)
2140 #define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts)
2141 #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets)
2142 #define elf_local_got_ents(bfd) (elf_tdata(bfd) -> local_got.ents)
2143 #define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name)
2144 #define elf_dt_audit(bfd) (elf_tdata(bfd) -> dt_audit)
2145 #define elf_dyn_lib_class(bfd) (elf_tdata(bfd) -> dyn_lib_class)
2146 #define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab)
2147 #define elf_flags_init(bfd) (elf_tdata(bfd) -> o->flags_init)
2148 #define elf_known_obj_attributes(bfd) (elf_tdata (bfd) -> known_obj_attributes)
2149 #define elf_other_obj_attributes(bfd) (elf_tdata (bfd) -> other_obj_attributes)
2150 #define elf_known_obj_attributes_proc(bfd) \
2151 (elf_known_obj_attributes (bfd) [OBJ_ATTR_PROC])
2152 #define elf_other_obj_attributes_proc(bfd) \
2153 (elf_other_obj_attributes (bfd) [OBJ_ATTR_PROC])
2154 #define elf_properties(bfd) (elf_tdata (bfd) -> properties)
2155 #define elf_has_no_copy_on_protected(bfd) \
2156 (elf_tdata(bfd) -> has_no_copy_on_protected)
2157 #define elf_has_indirect_extern_access(bfd) \
2158 (elf_tdata(bfd) -> has_indirect_extern_access)
2160 extern void _bfd_elf_swap_verdef_in
2161 (bfd
*, const Elf_External_Verdef
*, Elf_Internal_Verdef
*);
2162 extern void _bfd_elf_swap_verdef_out
2163 (bfd
*, const Elf_Internal_Verdef
*, Elf_External_Verdef
*);
2164 extern void _bfd_elf_swap_verdaux_in
2165 (bfd
*, const Elf_External_Verdaux
*, Elf_Internal_Verdaux
*);
2166 extern void _bfd_elf_swap_verdaux_out
2167 (bfd
*, const Elf_Internal_Verdaux
*, Elf_External_Verdaux
*);
2168 extern void _bfd_elf_swap_verneed_in
2169 (bfd
*, const Elf_External_Verneed
*, Elf_Internal_Verneed
*);
2170 extern void _bfd_elf_swap_verneed_out
2171 (bfd
*, const Elf_Internal_Verneed
*, Elf_External_Verneed
*);
2172 extern void _bfd_elf_swap_vernaux_in
2173 (bfd
*, const Elf_External_Vernaux
*, Elf_Internal_Vernaux
*);
2174 extern void _bfd_elf_swap_vernaux_out
2175 (bfd
*, const Elf_Internal_Vernaux
*, Elf_External_Vernaux
*);
2176 extern void _bfd_elf_swap_versym_in
2177 (bfd
*, const Elf_External_Versym
*, Elf_Internal_Versym
*);
2178 extern void _bfd_elf_swap_versym_out
2179 (bfd
*, const Elf_Internal_Versym
*, Elf_External_Versym
*);
2181 extern unsigned int _bfd_elf_section_from_bfd_section
2182 (bfd
*, asection
*);
2183 extern char *bfd_elf_string_from_elf_section
2184 (bfd
*, unsigned, unsigned);
2185 extern Elf_Internal_Sym
*bfd_elf_get_elf_syms
2186 (bfd
*, Elf_Internal_Shdr
*, size_t, size_t, Elf_Internal_Sym
*, void *,
2187 Elf_External_Sym_Shndx
*);
2188 extern char * bfd_elf_get_str_section (bfd
*, unsigned int);
2189 extern const char *bfd_elf_sym_name
2190 (bfd
*, Elf_Internal_Shdr
*, Elf_Internal_Sym
*, asection
*);
2192 extern bool _bfd_elf_copy_private_bfd_data
2194 extern bool _bfd_elf_print_private_bfd_data
2196 const char * _bfd_elf_get_symbol_version_string
2197 (bfd
*, asymbol
*, bool, bool *);
2198 extern void bfd_elf_print_symbol
2199 (bfd
*, void *, asymbol
*, bfd_print_symbol_type
);
2201 extern unsigned int _bfd_elf_eh_frame_address_size
2202 (bfd
*, const asection
*);
2203 extern bfd_byte _bfd_elf_encode_eh_address
2204 (bfd
*abfd
, struct bfd_link_info
*info
, asection
*osec
, bfd_vma offset
,
2205 asection
*loc_sec
, bfd_vma loc_offset
, bfd_vma
*encoded
);
2206 extern bool _bfd_elf_can_make_relative
2207 (bfd
*input_bfd
, struct bfd_link_info
*info
, asection
*eh_frame_section
);
2209 extern enum elf_reloc_type_class _bfd_elf_reloc_type_class
2210 (const struct bfd_link_info
*, const asection
*,
2211 const Elf_Internal_Rela
*);
2212 extern bfd_vma _bfd_elf_rela_local_sym
2213 (bfd
*, Elf_Internal_Sym
*, asection
**, Elf_Internal_Rela
*);
2214 extern bfd_vma _bfd_elf_rel_local_sym
2215 (bfd
*, Elf_Internal_Sym
*, asection
**, bfd_vma
);
2216 extern bfd_vma _bfd_elf_section_offset
2217 (bfd
*, struct bfd_link_info
*, asection
*, bfd_vma
);
2219 extern unsigned long bfd_elf_hash
2221 extern unsigned long bfd_elf_gnu_hash
2224 extern bfd_reloc_status_type bfd_elf_generic_reloc
2225 (bfd
*, arelent
*, asymbol
*, void *, asection
*, bfd
*, char **);
2226 extern bool bfd_elf_allocate_object
2227 (bfd
*, size_t, enum elf_target_id
);
2228 extern bool bfd_elf_make_object
2230 extern bool bfd_elf_mkcorefile
2232 extern bool _bfd_elf_make_section_from_shdr
2233 (bfd
*, Elf_Internal_Shdr
*, const char *, int);
2234 extern bool _bfd_elf_make_section_from_phdr
2235 (bfd
*, Elf_Internal_Phdr
*, int, const char *);
2236 extern struct bfd_hash_entry
*_bfd_elf_link_hash_newfunc
2237 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *);
2238 extern struct bfd_link_hash_table
*_bfd_elf_link_hash_table_create
2240 extern void _bfd_elf_link_hash_table_free
2242 extern void _bfd_elf_link_hash_copy_indirect
2243 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
2244 struct elf_link_hash_entry
*);
2245 extern void _bfd_elf_link_hash_hide_symbol
2246 (struct bfd_link_info
*, struct elf_link_hash_entry
*, bool);
2247 extern void _bfd_elf_link_hide_symbol
2248 (bfd
*, struct bfd_link_info
*, struct bfd_link_hash_entry
*);
2249 extern bool _bfd_elf_link_hash_fixup_symbol
2250 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
2251 extern bool _bfd_elf_link_hash_table_init
2252 (struct elf_link_hash_table
*, bfd
*,
2253 struct bfd_hash_entry
*(*)
2254 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *),
2255 unsigned int, enum elf_target_id
);
2256 extern bool _bfd_elf_slurp_version_tables
2258 extern bool _bfd_elf_merge_sections
2259 (bfd
*, struct bfd_link_info
*);
2260 extern bool _bfd_elf_match_sections_by_type
2261 (bfd
*, const asection
*, bfd
*, const asection
*);
2262 extern bool bfd_elf_is_group_section
2263 (bfd
*, const struct bfd_section
*);
2264 extern const char *bfd_elf_group_name
2265 (bfd
*, const struct bfd_section
*);
2266 extern bool _bfd_elf_section_already_linked
2267 (bfd
*, asection
*, struct bfd_link_info
*);
2268 extern void bfd_elf_set_group_contents
2269 (bfd
*, asection
*, void *);
2270 extern unsigned int _bfd_elf_filter_global_symbols
2271 (bfd
*, struct bfd_link_info
*, asymbol
**, long);
2272 extern asection
*_bfd_elf_check_kept_section
2273 (asection
*, struct bfd_link_info
*);
2274 #define _bfd_elf_link_just_syms _bfd_generic_link_just_syms
2275 extern void _bfd_elf_copy_link_hash_symbol_type
2276 (bfd
*, struct bfd_link_hash_entry
*, struct bfd_link_hash_entry
*);
2277 extern bool _bfd_elf_size_group_sections
2278 (struct bfd_link_info
*);
2279 extern bool _bfd_elf_fixup_group_sections
2280 (bfd
*, asection
*);
2281 extern bool _bfd_elf_copy_private_header_data
2283 extern bool _bfd_elf_copy_private_symbol_data
2284 (bfd
*, asymbol
*, bfd
*, asymbol
*);
2285 #define _bfd_generic_init_private_section_data \
2286 _bfd_elf_init_private_section_data
2287 extern bool _bfd_elf_init_private_section_data
2288 (bfd
*, asection
*, bfd
*, asection
*, struct bfd_link_info
*);
2289 extern bool _bfd_elf_copy_private_section_data
2290 (bfd
*, asection
*, bfd
*, asection
*);
2291 extern bool _bfd_elf_write_object_contents
2293 extern bool _bfd_elf_write_corefile_contents
2295 extern bool _bfd_elf_set_section_contents
2296 (bfd
*, sec_ptr
, const void *, file_ptr
, bfd_size_type
);
2297 extern long _bfd_elf_get_symtab_upper_bound
2299 extern long _bfd_elf_canonicalize_symtab
2300 (bfd
*, asymbol
**);
2301 extern long _bfd_elf_get_dynamic_symtab_upper_bound
2303 extern long _bfd_elf_canonicalize_dynamic_symtab
2304 (bfd
*, asymbol
**);
2305 extern long _bfd_elf_get_synthetic_symtab
2306 (bfd
*, long, asymbol
**, long, asymbol
**, asymbol
**);
2307 extern long _bfd_elf_get_reloc_upper_bound
2309 extern long _bfd_elf_canonicalize_reloc
2310 (bfd
*, sec_ptr
, arelent
**, asymbol
**);
2311 extern asection
* _bfd_elf_get_dynamic_reloc_section
2312 (bfd
*, asection
*, bool);
2313 extern asection
* _bfd_elf_make_dynamic_reloc_section
2314 (asection
*, bfd
*, unsigned int, bfd
*, bool);
2315 extern long _bfd_elf_get_dynamic_reloc_upper_bound
2317 extern long _bfd_elf_canonicalize_dynamic_reloc
2318 (bfd
*, arelent
**, asymbol
**);
2319 extern asymbol
*_bfd_elf_make_empty_symbol
2321 extern void _bfd_elf_get_symbol_info
2322 (bfd
*, asymbol
*, symbol_info
*);
2323 extern bool _bfd_elf_is_local_label_name
2324 (bfd
*, const char *);
2325 extern alent
*_bfd_elf_get_lineno
2327 extern bool _bfd_elf_set_arch_mach
2328 (bfd
*, enum bfd_architecture
, unsigned long);
2329 extern bool _bfd_elf_find_nearest_line
2330 (bfd
*, asymbol
**, asection
*, bfd_vma
,
2331 const char **, const char **, unsigned int *, unsigned int *);
2332 extern bool _bfd_elf_find_line
2333 (bfd
*, asymbol
**, asymbol
*, const char **, unsigned int *);
2334 extern bool _bfd_elf_find_inliner_info
2335 (bfd
*, const char **, const char **, unsigned int *);
2336 extern asymbol
*_bfd_elf_find_function
2337 (bfd
*, asymbol
**, asection
*, bfd_vma
, const char **, const char **);
2338 #define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols
2339 #define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
2340 extern int _bfd_elf_sizeof_headers
2341 (bfd
*, struct bfd_link_info
*);
2342 extern bool _bfd_elf_new_section_hook
2343 (bfd
*, asection
*);
2344 extern const struct bfd_elf_special_section
*_bfd_elf_get_special_section
2345 (const char *, const struct bfd_elf_special_section
*, unsigned int);
2346 extern const struct bfd_elf_special_section
*_bfd_elf_get_sec_type_attr
2347 (bfd
*, asection
*);
2349 extern bool _bfd_elf_link_hide_sym_by_version
2350 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
2352 /* If the target doesn't have reloc handling written yet: */
2353 extern bool _bfd_elf_no_info_to_howto
2354 (bfd
*, arelent
*, Elf_Internal_Rela
*);
2356 extern bool bfd_section_from_shdr
2357 (bfd
*, unsigned int shindex
);
2358 extern bool bfd_section_from_phdr
2359 (bfd
*, Elf_Internal_Phdr
*, int);
2361 extern int _bfd_elf_symbol_from_bfd_symbol
2362 (bfd
*, asymbol
**);
2364 extern Elf_Internal_Sym
*bfd_sym_from_r_symndx
2365 (struct sym_cache
*, bfd
*, unsigned long);
2366 extern asection
*bfd_section_from_elf_index
2367 (bfd
*, unsigned int);
2369 extern struct elf_strtab_hash
* _bfd_elf_strtab_init
2371 extern void _bfd_elf_strtab_free
2372 (struct elf_strtab_hash
*);
2373 extern size_t _bfd_elf_strtab_add
2374 (struct elf_strtab_hash
*, const char *, bool);
2375 extern void _bfd_elf_strtab_addref
2376 (struct elf_strtab_hash
*, size_t);
2377 extern void _bfd_elf_strtab_delref
2378 (struct elf_strtab_hash
*, size_t);
2379 extern unsigned int _bfd_elf_strtab_refcount
2380 (struct elf_strtab_hash
*, size_t);
2381 extern void _bfd_elf_strtab_clear_all_refs
2382 (struct elf_strtab_hash
*);
2383 extern void *_bfd_elf_strtab_save
2384 (struct elf_strtab_hash
*);
2385 extern void _bfd_elf_strtab_restore
2386 (struct elf_strtab_hash
*, void *);
2387 extern bfd_size_type _bfd_elf_strtab_size
2388 (struct elf_strtab_hash
*);
2389 extern bfd_size_type _bfd_elf_strtab_len
2390 (struct elf_strtab_hash
*);
2391 extern bfd_size_type _bfd_elf_strtab_offset
2392 (struct elf_strtab_hash
*, size_t);
2393 extern const char * _bfd_elf_strtab_str
2394 (struct elf_strtab_hash
*, size_t idx
, bfd_size_type
*offset
);
2395 extern bool _bfd_elf_strtab_emit
2396 (bfd
*, struct elf_strtab_hash
*);
2397 extern void _bfd_elf_strtab_finalize
2398 (struct elf_strtab_hash
*);
2400 extern bool bfd_elf_parse_eh_frame_entries
2401 (bfd
*, struct bfd_link_info
*);
2402 extern bool _bfd_elf_parse_eh_frame_entry
2403 (struct bfd_link_info
*, asection
*, struct elf_reloc_cookie
*);
2404 extern void _bfd_elf_parse_eh_frame
2405 (bfd
*, struct bfd_link_info
*, asection
*, struct elf_reloc_cookie
*);
2406 extern bool _bfd_elf_end_eh_frame_parsing
2407 (struct bfd_link_info
*info
);
2409 extern bool _bfd_elf_discard_section_eh_frame
2410 (bfd
*, struct bfd_link_info
*, asection
*,
2411 bool (*) (bfd_vma
, void *), struct elf_reloc_cookie
*);
2412 extern bool _bfd_elf_adjust_eh_frame_global_symbol
2413 (struct elf_link_hash_entry
*, void *);
2414 extern bool _bfd_elf_discard_section_eh_frame_hdr
2415 (bfd
*, struct bfd_link_info
*);
2416 extern bfd_vma _bfd_elf_eh_frame_section_offset
2417 (bfd
*, struct bfd_link_info
*, asection
*, bfd_vma
);
2418 extern bool _bfd_elf_write_section_eh_frame
2419 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
2420 bool _bfd_elf_write_section_eh_frame_entry
2421 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
2422 extern bool _bfd_elf_fixup_eh_frame_hdr (struct bfd_link_info
*);
2423 extern bool _bfd_elf_write_section_eh_frame_hdr
2424 (bfd
*, struct bfd_link_info
*);
2425 extern bool _bfd_elf_eh_frame_present
2426 (struct bfd_link_info
*);
2427 extern bool _bfd_elf_eh_frame_entry_present
2428 (struct bfd_link_info
*);
2429 extern bool _bfd_elf_maybe_strip_eh_frame_hdr
2430 (struct bfd_link_info
*);
2432 extern bool _bfd_elf_hash_symbol (struct elf_link_hash_entry
*);
2434 extern long _bfd_elf_link_lookup_local_dynindx
2435 (struct bfd_link_info
*, bfd
*, long);
2436 extern bool _bfd_elf_compute_section_file_positions
2437 (bfd
*, struct bfd_link_info
*);
2438 extern file_ptr _bfd_elf_assign_file_position_for_section
2439 (Elf_Internal_Shdr
*, file_ptr
, bool);
2440 extern bool _bfd_elf_modify_headers
2441 (bfd
*, struct bfd_link_info
*);
2443 extern bool _bfd_elf_validate_reloc
2446 extern bool bfd_elf_record_link_assignment
2447 (bfd
*, struct bfd_link_info
*, const char *, bool,
2449 extern bool bfd_elf_stack_segment_size (bfd
*, struct bfd_link_info
*,
2450 const char *, bfd_vma
);
2451 extern bool bfd_elf_size_dynamic_sections
2452 (bfd
*, const char *, const char *, const char *, const char *, const char *,
2453 const char * const *, struct bfd_link_info
*, struct bfd_section
**);
2454 extern bool bfd_elf_size_dynsym_hash_dynstr
2455 (bfd
*, struct bfd_link_info
*);
2456 extern bool bfd_elf_get_bfd_needed_list
2457 (bfd
*, struct bfd_link_needed_list
**);
2458 extern struct bfd_link_needed_list
*bfd_elf_get_needed_list
2459 (bfd
*, struct bfd_link_info
*);
2460 extern void bfd_elf_set_dt_needed_name
2461 (bfd
*, const char *);
2462 extern const char *bfd_elf_get_dt_soname
2464 extern void bfd_elf_set_dyn_lib_class
2465 (bfd
*, enum dynamic_lib_link_class
);
2466 extern int bfd_elf_get_dyn_lib_class
2468 extern struct bfd_link_needed_list
*bfd_elf_get_runpath_list
2469 (bfd
*, struct bfd_link_info
*);
2470 extern int bfd_elf_discard_info
2471 (bfd
*, struct bfd_link_info
*);
2472 extern unsigned int _bfd_elf_default_action_discarded
2473 (struct bfd_section
*);
2474 extern struct bfd_section
*_bfd_elf_tls_setup
2475 (bfd
*, struct bfd_link_info
*);
2477 extern bool _bfd_elf_link_create_dynamic_sections
2478 (bfd
*, struct bfd_link_info
*);
2479 extern bool _bfd_elf_omit_section_dynsym_default
2480 (bfd
*, struct bfd_link_info
*, asection
*);
2481 extern bool _bfd_elf_omit_section_dynsym_all
2482 (bfd
*, struct bfd_link_info
*, asection
*);
2483 extern bool _bfd_elf_create_dynamic_sections
2484 (bfd
*, struct bfd_link_info
*);
2485 extern bool _bfd_elf_create_got_section
2486 (bfd
*, struct bfd_link_info
*);
2487 extern asection
*_bfd_elf_section_for_symbol
2488 (struct elf_reloc_cookie
*, unsigned long, bool);
2489 extern struct elf_link_hash_entry
*_bfd_elf_define_linkage_sym
2490 (bfd
*, struct bfd_link_info
*, asection
*, const char *);
2491 extern void _bfd_elf_init_1_index_section
2492 (bfd
*, struct bfd_link_info
*);
2493 extern void _bfd_elf_init_2_index_sections
2494 (bfd
*, struct bfd_link_info
*);
2496 extern bool _bfd_elfcore_make_pseudosection
2497 (bfd
*, char *, size_t, ufile_ptr
);
2498 extern char *_bfd_elfcore_strndup
2499 (bfd
*, char *, size_t);
2501 extern Elf_Internal_Rela
*_bfd_elf_link_read_relocs
2502 (bfd
*, asection
*, void *, Elf_Internal_Rela
*, bool);
2503 extern Elf_Internal_Rela
*_bfd_elf_link_info_read_relocs
2504 (bfd
*, struct bfd_link_info
*, asection
*, void *, Elf_Internal_Rela
*,
2507 extern bool _bfd_elf_link_output_relocs
2508 (bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*,
2509 struct elf_link_hash_entry
**);
2511 extern bool _bfd_elf_adjust_dynamic_copy
2512 (struct bfd_link_info
*, struct elf_link_hash_entry
*, asection
*);
2514 extern bool _bfd_elf_dynamic_symbol_p
2515 (struct elf_link_hash_entry
*, struct bfd_link_info
*, bool);
2517 extern bool _bfd_elf_symbol_refs_local_p
2518 (struct elf_link_hash_entry
*, struct bfd_link_info
*, bool);
2520 extern bfd_reloc_status_type bfd_elf_perform_complex_relocation
2521 (bfd
*, asection
*, bfd_byte
*, Elf_Internal_Rela
*, bfd_vma
);
2523 extern bool _bfd_elf_setup_sections
2526 extern struct bfd_link_hash_entry
*bfd_elf_define_start_stop
2527 (struct bfd_link_info
*, const char *, asection
*);
2529 extern bool _bfd_elf_init_file_header (bfd
*, struct bfd_link_info
*);
2531 extern bool _bfd_elf_final_write_processing (bfd
*);
2533 extern bfd_cleanup bfd_elf32_object_p
2535 extern bfd_cleanup bfd_elf32_core_file_p
2537 extern char *bfd_elf32_core_file_failing_command
2539 extern int bfd_elf32_core_file_failing_signal
2541 extern bool bfd_elf32_core_file_matches_executable_p
2543 extern int bfd_elf32_core_file_pid
2545 extern bool _bfd_elf32_core_find_build_id
2548 extern bool bfd_elf32_swap_symbol_in
2549 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
2550 extern void bfd_elf32_swap_symbol_out
2551 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
2552 extern void bfd_elf32_swap_reloc_in
2553 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2554 extern void bfd_elf32_swap_reloc_out
2555 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2556 extern void bfd_elf32_swap_reloca_in
2557 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2558 extern void bfd_elf32_swap_reloca_out
2559 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2560 extern void bfd_elf32_swap_phdr_in
2561 (bfd
*, const Elf32_External_Phdr
*, Elf_Internal_Phdr
*);
2562 extern void bfd_elf32_swap_phdr_out
2563 (bfd
*, const Elf_Internal_Phdr
*, Elf32_External_Phdr
*);
2564 extern void bfd_elf32_swap_dyn_in
2565 (bfd
*, const void *, Elf_Internal_Dyn
*);
2566 extern void bfd_elf32_swap_dyn_out
2567 (bfd
*, const Elf_Internal_Dyn
*, void *);
2568 extern long bfd_elf32_slurp_symbol_table
2569 (bfd
*, asymbol
**, bool);
2570 extern bool bfd_elf32_write_shdrs_and_ehdr
2572 extern int bfd_elf32_write_out_phdrs
2573 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
2574 extern bool bfd_elf32_checksum_contents
2575 (bfd
* , void (*) (const void *, size_t, void *), void *);
2576 extern void bfd_elf32_write_relocs
2577 (bfd
*, asection
*, void *);
2578 extern bool bfd_elf32_slurp_reloc_table
2579 (bfd
*, asection
*, asymbol
**, bool);
2581 extern bfd_cleanup bfd_elf64_object_p
2583 extern bfd_cleanup bfd_elf64_core_file_p
2585 extern char *bfd_elf64_core_file_failing_command
2587 extern int bfd_elf64_core_file_failing_signal
2589 extern bool bfd_elf64_core_file_matches_executable_p
2591 extern int bfd_elf64_core_file_pid
2593 extern bool _bfd_elf64_core_find_build_id
2596 extern bool bfd_elf64_swap_symbol_in
2597 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
2598 extern void bfd_elf64_swap_symbol_out
2599 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
2600 extern void bfd_elf64_swap_reloc_in
2601 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2602 extern void bfd_elf64_swap_reloc_out
2603 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2604 extern void bfd_elf64_swap_reloca_in
2605 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2606 extern void bfd_elf64_swap_reloca_out
2607 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2608 extern void bfd_elf64_swap_phdr_in
2609 (bfd
*, const Elf64_External_Phdr
*, Elf_Internal_Phdr
*);
2610 extern void bfd_elf64_swap_phdr_out
2611 (bfd
*, const Elf_Internal_Phdr
*, Elf64_External_Phdr
*);
2612 extern void bfd_elf64_swap_dyn_in
2613 (bfd
*, const void *, Elf_Internal_Dyn
*);
2614 extern void bfd_elf64_swap_dyn_out
2615 (bfd
*, const Elf_Internal_Dyn
*, void *);
2616 extern long bfd_elf64_slurp_symbol_table
2617 (bfd
*, asymbol
**, bool);
2618 extern bool bfd_elf64_write_shdrs_and_ehdr
2620 extern int bfd_elf64_write_out_phdrs
2621 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
2622 extern bool bfd_elf64_checksum_contents
2623 (bfd
* , void (*) (const void *, size_t, void *), void *);
2624 extern void bfd_elf64_write_relocs
2625 (bfd
*, asection
*, void *);
2626 extern bool bfd_elf64_slurp_reloc_table
2627 (bfd
*, asection
*, asymbol
**, bool);
2629 extern bool _bfd_elf_default_relocs_compatible
2630 (const bfd_target
*, const bfd_target
*);
2632 extern bool _bfd_elf_relocs_compatible
2633 (const bfd_target
*, const bfd_target
*);
2634 extern bool _bfd_elf_notice_as_needed
2635 (bfd
*, struct bfd_link_info
*, enum notice_asneeded_action
);
2637 extern struct bfd_link_hash_entry
*_bfd_elf_archive_symbol_lookup
2638 (bfd
*, struct bfd_link_info
*, const char *);
2639 extern bool bfd_elf_link_add_symbols
2640 (bfd
*, struct bfd_link_info
*);
2641 extern bool _bfd_elf_add_dynamic_entry
2642 (struct bfd_link_info
*, bfd_vma
, bfd_vma
);
2643 extern bool _bfd_elf_strip_zero_sized_dynamic_sections
2644 (struct bfd_link_info
*);
2645 extern int bfd_elf_add_dt_needed_tag
2646 (bfd
*, struct bfd_link_info
*);
2647 extern bool _bfd_elf_link_check_relocs
2648 (bfd
*, struct bfd_link_info
*);
2649 extern bool _bfd_elf_link_iterate_on_relocs
2650 (bfd
*, struct bfd_link_info
*,
2651 bool (*) (bfd
*, struct bfd_link_info
*, asection
*,
2652 const Elf_Internal_Rela
*));
2654 extern bool bfd_elf_link_record_dynamic_symbol
2655 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
2657 extern int bfd_elf_link_record_local_dynamic_symbol
2658 (struct bfd_link_info
*, bfd
*, long);
2660 extern bool _bfd_elf_close_and_cleanup
2663 extern bool _bfd_elf_common_definition
2664 (Elf_Internal_Sym
*);
2666 extern unsigned int _bfd_elf_common_section_index
2669 extern asection
*_bfd_elf_common_section
2672 extern bfd_vma _bfd_elf_default_got_elt_size
2673 (bfd
*, struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd
*,
2676 extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn
2677 (bfd
*, arelent
*, struct bfd_symbol
*, void *,
2678 asection
*, bfd
*, char **);
2680 extern bool bfd_elf_final_link
2681 (bfd
*, struct bfd_link_info
*);
2683 extern void _bfd_elf_gc_keep
2684 (struct bfd_link_info
*info
);
2686 extern bool bfd_elf_gc_mark_dynamic_ref_symbol
2687 (struct elf_link_hash_entry
*h
, void *inf
);
2689 extern bool bfd_elf_gc_sections
2690 (bfd
*, struct bfd_link_info
*);
2692 extern bool bfd_elf_gc_record_vtinherit
2693 (bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
);
2695 extern bool bfd_elf_gc_record_vtentry
2696 (bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
);
2698 extern asection
*_bfd_elf_gc_mark_hook
2699 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
2700 struct elf_link_hash_entry
*, Elf_Internal_Sym
*);
2702 extern asection
*_bfd_elf_gc_mark_rsec
2703 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
,
2704 struct elf_reloc_cookie
*, bool *);
2706 extern bool _bfd_elf_gc_mark_reloc
2707 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
,
2708 struct elf_reloc_cookie
*);
2710 extern bool _bfd_elf_gc_mark_fdes
2711 (struct bfd_link_info
*, asection
*, asection
*, elf_gc_mark_hook_fn
,
2712 struct elf_reloc_cookie
*);
2714 extern bool _bfd_elf_gc_mark
2715 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
);
2717 extern bool _bfd_elf_gc_mark_extra_sections
2718 (struct bfd_link_info
*, elf_gc_mark_hook_fn
);
2720 extern bool bfd_elf_gc_common_finalize_got_offsets
2721 (bfd
*, struct bfd_link_info
*);
2723 extern bool bfd_elf_gc_common_final_link
2724 (bfd
*, struct bfd_link_info
*);
2726 extern bool bfd_elf_reloc_symbol_deleted_p
2729 extern struct elf_segment_map
* _bfd_elf_make_dynamic_segment
2730 (bfd
*, asection
*);
2732 extern bool _bfd_elf_map_sections_to_segments
2733 (bfd
*, struct bfd_link_info
*, bool *);
2735 extern bool _bfd_elf_is_function_type (unsigned int);
2737 extern bfd_size_type
_bfd_elf_maybe_function_sym (const asymbol
*, asection
*,
2740 extern asection
*_bfd_elf_plt_get_reloc_section (bfd
*, const char *);
2742 extern int bfd_elf_get_default_section_type (flagword
);
2744 extern bool bfd_elf_lookup_section_flags
2745 (struct bfd_link_info
*, struct flag_info
*, asection
*);
2747 extern Elf_Internal_Phdr
* _bfd_elf_find_segment_containing_section
2748 (bfd
* abfd
, asection
* section
);
2750 /* PowerPC @tls opcode transform/validate. */
2751 extern unsigned int _bfd_elf_ppc_at_tls_transform
2752 (unsigned int, unsigned int);
2753 /* PowerPC @tprel opcode transform/validate. */
2754 extern unsigned int _bfd_elf_ppc_at_tprel_transform
2755 (unsigned int, unsigned int);
2756 /* PowerPC elf_object_p tweak. */
2757 extern bool _bfd_elf_ppc_set_arch (bfd
*);
2758 /* PowerPC .gnu.attributes handling common to both 32-bit and 64-bit. */
2759 extern bool _bfd_elf_ppc_merge_fp_attributes
2760 (bfd
*, struct bfd_link_info
*);
2762 /* Return an upper bound on the number of bytes required to store a
2763 copy of ABFD's program header table entries. Return -1 if an error
2764 occurs; bfd_get_error will return an appropriate code. */
2765 extern long bfd_get_elf_phdr_upper_bound
2768 /* Copy ABFD's program header table entries to *PHDRS. The entries
2769 will be stored as an array of Elf_Internal_Phdr structures, as
2770 defined in include/elf/internal.h. To find out how large the
2771 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
2773 Return the number of program header table entries read, or -1 if an
2774 error occurs; bfd_get_error will return an appropriate code. */
2775 extern int bfd_get_elf_phdrs
2776 (bfd
*abfd
, void *phdrs
);
2778 /* Exported interface for writing elf corefile notes. */
2779 extern char *elfcore_write_note
2780 (bfd
*, char *, int *, const char *, int, const void *, int);
2781 extern char *elfcore_write_prpsinfo
2782 (bfd
*, char *, int *, const char *, const char *);
2783 extern char *elfcore_write_prstatus
2784 (bfd
*, char *, int *, long, int, const void *);
2785 extern char * elfcore_write_pstatus
2786 (bfd
*, char *, int *, long, int, const void *);
2787 extern char *elfcore_write_prfpreg
2788 (bfd
*, char *, int *, const void *, int);
2789 extern char *elfcore_write_prxfpreg
2790 (bfd
*, char *, int *, const void *, int);
2791 extern char *elfcore_write_xstatereg
2792 (bfd
*, char *, int *, const void *, int);
2793 extern char *elfcore_write_ppc_vmx
2794 (bfd
*, char *, int *, const void *, int);
2795 extern char *elfcore_write_ppc_vsx
2796 (bfd
*, char *, int *, const void *, int);
2797 extern char *elfcore_write_ppc_tar
2798 (bfd
*, char *, int *, const void *, int);
2799 extern char *elfcore_write_ppc_ppr
2800 (bfd
*, char *, int *, const void *, int);
2801 extern char *elfcore_write_ppc_dscr
2802 (bfd
*, char *, int *, const void *, int);
2803 extern char *elfcore_write_ppc_ebb
2804 (bfd
*, char *, int *, const void *, int);
2805 extern char *elfcore_write_ppc_pmu
2806 (bfd
*, char *, int *, const void *, int);
2807 extern char *elfcore_write_ppc_tm_cgpr
2808 (bfd
*, char *, int *, const void *, int);
2809 extern char *elfcore_write_ppc_tm_cfpr
2810 (bfd
*, char *, int *, const void *, int);
2811 extern char *elfcore_write_ppc_tm_cvmx
2812 (bfd
*, char *, int *, const void *, int);
2813 extern char *elfcore_write_ppc_tm_cvsx
2814 (bfd
*, char *, int *, const void *, int);
2815 extern char *elfcore_write_ppc_tm_spr
2816 (bfd
*, char *, int *, const void *, int);
2817 extern char *elfcore_write_ppc_tm_ctar
2818 (bfd
*, char *, int *, const void *, int);
2819 extern char *elfcore_write_ppc_tm_cppr
2820 (bfd
*, char *, int *, const void *, int);
2821 extern char *elfcore_write_ppc_tm_cdscr
2822 (bfd
*, char *, int *, const void *, int);
2823 extern char *elfcore_write_s390_timer
2824 (bfd
*, char *, int *, const void *, int);
2825 extern char *elfcore_write_s390_todcmp
2826 (bfd
*, char *, int *, const void *, int);
2827 extern char *elfcore_write_s390_todpreg
2828 (bfd
*, char *, int *, const void *, int);
2829 extern char *elfcore_write_s390_ctrs
2830 (bfd
*, char *, int *, const void *, int);
2831 extern char *elfcore_write_s390_prefix
2832 (bfd
*, char *, int *, const void *, int);
2833 extern char *elfcore_write_s390_last_break
2834 (bfd
*, char *, int *, const void *, int);
2835 extern char *elfcore_write_s390_system_call
2836 (bfd
*, char *, int *, const void *, int);
2837 extern char *elfcore_write_s390_tdb
2838 (bfd
*, char *, int *, const void *, int);
2839 extern char *elfcore_write_s390_vxrs_low
2840 (bfd
*, char *, int *, const void *, int);
2841 extern char *elfcore_write_s390_vxrs_high
2842 (bfd
*, char *, int *, const void *, int);
2843 extern char *elfcore_write_s390_gs_cb
2844 (bfd
*, char *, int *, const void *, int);
2845 extern char *elfcore_write_s390_gs_bc
2846 (bfd
*, char *, int *, const void *, int);
2847 extern char *elfcore_write_arm_vfp
2848 (bfd
*, char *, int *, const void *, int);
2849 extern char *elfcore_write_aarch_tls
2850 (bfd
*, char *, int *, const void *, int);
2851 extern char *elfcore_write_aarch_hw_break
2852 (bfd
*, char *, int *, const void *, int);
2853 extern char *elfcore_write_aarch_hw_watch
2854 (bfd
*, char *, int *, const void *, int);
2855 extern char *elfcore_write_aarch_sve
2856 (bfd
*, char *, int *, const void *, int);
2857 extern char *elfcore_write_aarch_pauth
2858 (bfd
*, char *, int *, const void *, int);
2859 extern char *elfcore_write_aarch_mte
2860 (bfd
*, char *, int *, const void *, int);
2861 extern char *elfcore_write_arc_v2
2862 (bfd
*, char *, int *, const void *, int);
2863 extern char *elfcore_write_riscv_csr
2864 (bfd
*, char *, int *, const void *, int);
2865 extern char *elfcore_write_gdb_tdesc
2866 (bfd
*, char *, int *, const void *, int);
2867 extern char *elfcore_write_lwpstatus
2868 (bfd
*, char *, int *, long, int, const void *);
2869 extern char *elfcore_write_register_note
2870 (bfd
*, char *, int *, const char *, const void *, int);
2871 extern char *elfcore_write_file_note
2872 (bfd
*, char *, int *, const void*, int);
2873 extern char *elfcore_write_loongarch_cpucfg
2874 (bfd
*, char *, int *, const void*, int);
2875 extern char *elfcore_write_loongarch_lbt
2876 (bfd
*, char *, int *, const void*, int);
2877 extern char *elfcore_write_loongarch_lsx
2878 (bfd
*, char *, int *, const void*, int);
2879 extern char *elfcore_write_loongarch_lasx
2880 (bfd
*, char *, int *, const void*, int);
2882 /* Internal structure which holds information to be included in the
2883 PRPSINFO section of Linux core files.
2885 This is an "internal" structure in the sense that it should be used
2886 to pass information to BFD (via the `elfcore_write_linux_prpsinfo'
2887 function), so things like endianess shouldn't be an issue. This
2888 structure will eventually be converted in one of the
2889 `elf_external_linux_*' structures and written out to an output bfd
2890 by one of the functions declared below. */
2892 struct elf_internal_linux_prpsinfo
2894 char pr_state
; /* Numeric process state. */
2895 char pr_sname
; /* Char for pr_state. */
2896 char pr_zomb
; /* Zombie. */
2897 char pr_nice
; /* Nice val. */
2898 unsigned long pr_flag
; /* Flags. */
2899 unsigned int pr_uid
;
2900 unsigned int pr_gid
;
2901 int pr_pid
, pr_ppid
, pr_pgrp
, pr_sid
;
2902 char pr_fname
[16 + 1]; /* Filename of executable. */
2903 char pr_psargs
[80 + 1]; /* Initial part of arg list. */
2906 /* Linux/most 32-bit archs. */
2907 extern char *elfcore_write_linux_prpsinfo32
2908 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
2910 /* Linux/most 64-bit archs. */
2911 extern char *elfcore_write_linux_prpsinfo64
2912 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
2914 extern bfd
*_bfd_elf32_bfd_from_remote_memory
2915 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
2916 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, bfd_size_type
));
2917 extern bfd
*_bfd_elf64_bfd_from_remote_memory
2918 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
2919 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, bfd_size_type
));
2921 extern bfd_vma
bfd_elf_obj_attr_size (bfd
*);
2922 extern void bfd_elf_set_obj_attr_contents (bfd
*, bfd_byte
*, bfd_vma
);
2923 extern int bfd_elf_get_obj_attr_int (bfd
*, int, unsigned int);
2924 extern void bfd_elf_add_obj_attr_int (bfd
*, int, unsigned int, unsigned int);
2925 #define bfd_elf_add_proc_attr_int(BFD, TAG, VALUE) \
2926 bfd_elf_add_obj_attr_int ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2927 extern void bfd_elf_add_obj_attr_string (bfd
*, int, unsigned int, const char *);
2928 #define bfd_elf_add_proc_attr_string(BFD, TAG, VALUE) \
2929 bfd_elf_add_obj_attr_string ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2930 extern void bfd_elf_add_obj_attr_int_string (bfd
*, int, unsigned int,
2931 unsigned int, const char *);
2932 #define bfd_elf_add_proc_attr_int_string(BFD, TAG, INTVAL, STRVAL) \
2933 bfd_elf_add_obj_attr_int_string ((BFD), OBJ_ATTR_PROC, (TAG), \
2936 extern char *_bfd_elf_attr_strdup (bfd
*, const char *);
2937 extern void _bfd_elf_copy_obj_attributes (bfd
*, bfd
*);
2938 extern int _bfd_elf_obj_attrs_arg_type (bfd
*, int, unsigned int);
2939 extern void _bfd_elf_parse_attributes (bfd
*, Elf_Internal_Shdr
*);
2940 extern bool _bfd_elf_merge_object_attributes
2941 (bfd
*, struct bfd_link_info
*);
2942 extern bool _bfd_elf_merge_unknown_attribute_low (bfd
*, bfd
*, int);
2943 extern bool _bfd_elf_merge_unknown_attribute_list (bfd
*, bfd
*);
2944 extern Elf_Internal_Shdr
*_bfd_elf_single_rel_hdr (asection
*sec
);
2945 extern bool elf_read_notes (bfd
*, file_ptr
, bfd_size_type
, size_t);
2947 extern bool _bfd_elf_parse_gnu_properties
2948 (bfd
*, Elf_Internal_Note
*);
2949 extern elf_property
* _bfd_elf_get_property
2950 (bfd
*, unsigned int, unsigned int);
2951 extern bfd
*_bfd_elf_link_setup_gnu_properties
2952 (struct bfd_link_info
*);
2953 extern bfd_size_type _bfd_elf_convert_gnu_property_size
2955 extern bool _bfd_elf_convert_gnu_properties
2956 (bfd
*, asection
*, bfd
*, bfd_byte
**, bfd_size_type
*);
2958 /* The linker may need to keep track of the number of relocs that it
2959 decides to copy as dynamic relocs in check_relocs for each symbol.
2960 This is so that it can later discard them if they are found to be
2961 unnecessary. We can store the information in a field extending the
2962 regular ELF linker hash table. */
2964 struct elf_dyn_relocs
2966 struct elf_dyn_relocs
*next
;
2968 /* The input section of the reloc. */
2971 /* Total number of relocs copied for the input section. */
2972 bfd_size_type count
;
2974 /* Number of pc-relative relocs copied for the input section. */
2975 bfd_size_type pc_count
;
2978 extern bool _bfd_elf_create_ifunc_sections
2979 (bfd
*, struct bfd_link_info
*);
2980 extern bool _bfd_elf_allocate_ifunc_dyn_relocs
2981 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
2982 struct elf_dyn_relocs
**, unsigned int, unsigned int,
2983 unsigned int, bool);
2985 extern void elf_append_rela (bfd
*, asection
*, Elf_Internal_Rela
*);
2986 extern void elf_append_rel (bfd
*, asection
*, Elf_Internal_Rela
*);
2988 extern bfd_vma
elf64_r_info (bfd_vma
, bfd_vma
);
2989 extern bfd_vma
elf64_r_sym (bfd_vma
);
2990 extern bfd_vma
elf32_r_info (bfd_vma
, bfd_vma
);
2991 extern bfd_vma
elf32_r_sym (bfd_vma
);
2993 extern bool is_debuginfo_file (bfd
*);
2996 extern bool _bfd_elf_init_secondary_reloc_section
2997 (bfd
*, Elf_Internal_Shdr
*, const char *, unsigned int);
2998 extern bool _bfd_elf_slurp_secondary_reloc_section
2999 (bfd
*, asection
*, asymbol
**, bool);
3000 extern bool _bfd_elf_copy_special_section_fields
3001 (const bfd
*, bfd
*, const Elf_Internal_Shdr
*, Elf_Internal_Shdr
*);
3002 extern bool _bfd_elf_write_secondary_reloc_section
3003 (bfd
*, asection
*);
3004 extern unsigned int _bfd_elf_symbol_section_index
3005 (bfd
*, elf_symbol_type
*);
3007 extern asection
*_bfd_elf_readonly_dynrelocs
3008 (struct elf_link_hash_entry
*);
3009 extern bool _bfd_elf_maybe_set_textrel
3010 (struct elf_link_hash_entry
*, void *);
3012 extern bool _bfd_elf_add_dynamic_tags
3013 (bfd
*, struct bfd_link_info
*, bool);
3015 /* Large common section. */
3016 extern asection _bfd_elf_large_com_section
;
3018 /* Hash for local symbol with the first section id, ID, in the input
3019 file and the local symbol index, SYM. */
3020 #define ELF_LOCAL_SYMBOL_HASH(ID, SYM) \
3021 (((((ID) & 0xffU) << 24) | (((ID) & 0xff00) << 8)) \
3022 ^ (SYM) ^ (((ID) & 0xffff0000U) >> 16))
3024 /* This is the condition under which finish_dynamic_symbol will be called.
3025 If our finish_dynamic_symbol isn't called, we'll need to do something
3026 about initializing any .plt and .got entries in relocate_section. */
3027 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
3029 && ((SHARED) || !(H)->forced_local) \
3030 && ((H)->dynindx != -1 || (H)->forced_local))
3032 /* This macro is to avoid lots of duplicated code in the body
3033 of xxx_relocate_section() in the various elfxx-xxxx.c files. */
3034 #define RELOC_FOR_GLOBAL_SYMBOL(info, input_bfd, input_section, rel, \
3035 r_symndx, symtab_hdr, sym_hashes, \
3036 h, sec, relocation, \
3037 unresolved_reloc, warned, ignored) \
3040 /* It seems this can happen with erroneous or unsupported \
3041 input (mixing a.out and elf in an archive, for example.) */ \
3042 if (sym_hashes == NULL) \
3045 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; \
3047 if (info->wrap_hash != NULL \
3048 && (input_section->flags & SEC_DEBUGGING) != 0) \
3049 h = ((struct elf_link_hash_entry *) \
3050 unwrap_hash_lookup (info, input_bfd, &h->root)); \
3052 while (h->root.type == bfd_link_hash_indirect \
3053 || h->root.type == bfd_link_hash_warning) \
3054 h = (struct elf_link_hash_entry *) h->root.u.i.link; \
3058 unresolved_reloc = false; \
3060 if (h->root.type == bfd_link_hash_defined \
3061 || h->root.type == bfd_link_hash_defweak) \
3063 sec = h->root.u.def.section; \
3065 || sec->output_section == NULL) \
3066 /* Set a flag that will be cleared later if we find a \
3067 relocation value for this symbol. output_section \
3068 is typically NULL for symbols satisfied by a shared \
3070 unresolved_reloc = true; \
3072 relocation = (h->root.u.def.value \
3073 + sec->output_section->vma \
3074 + sec->output_offset); \
3076 else if (h->root.type == bfd_link_hash_undefweak) \
3078 else if (info->unresolved_syms_in_objects == RM_IGNORE \
3079 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) \
3081 else if (!bfd_link_relocatable (info)) \
3083 bool err = ((info->unresolved_syms_in_objects == RM_DIAGNOSE \
3084 && !info->warn_unresolved_syms) \
3085 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT); \
3086 (*info->callbacks->undefined_symbol) (info, \
3087 h->root.root.string, \
3090 rel->r_offset, err); \
3093 (void) unresolved_reloc; \
3099 /* This macro is to avoid lots of duplicated code in the body of the
3100 loop over relocations in xxx_relocate_section() in the various
3103 Handle relocations against symbols from removed linkonce sections,
3104 or sections discarded by a linker script. When doing a relocatable
3105 link, we remove such relocations. Otherwise, we just want the
3106 section contents zeroed and avoid any special processing. */
3107 #define RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
3108 rel, count, relend, \
3109 howto, index, contents) \
3112 _bfd_clear_contents (howto, input_bfd, input_section, \
3113 contents, rel[index].r_offset); \
3115 if (bfd_link_relocatable (info) \
3116 && (input_section->flags & SEC_DEBUGGING)) \
3118 /* Only remove relocations in debug sections since other \
3119 sections may require relocations. */ \
3120 Elf_Internal_Shdr *rel_hdr; \
3122 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
3124 /* Avoid empty output section. */ \
3125 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
3127 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
3128 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
3129 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
3131 memmove (rel, rel + count, \
3132 (relend - rel - count) * sizeof (*rel)); \
3134 input_section->reloc_count -= count; \
3141 for (i_ = 0; i_ < count; i_++) \
3143 rel[i_].r_info = 0; \
3144 rel[i_].r_addend = 0; \
3150 /* Will a symbol be bound to the definition within the shared
3151 library, if any. A unique symbol can never be bound locally. */
3152 #define SYMBOLIC_BIND(INFO, H) \
3153 (!(H)->unique_global \
3154 && ((INFO)->symbolic \
3155 || (H)->start_stop \
3156 || ((INFO)->dynamic && !(H)->dynamic)))
3158 /* Determine if a section contains CTF data, using its name. */
3160 bfd_section_is_ctf (const asection
*sec
)
3162 const char *name
= bfd_section_name (sec
);
3163 return startswith (name
, ".ctf") && (name
[4] == 0 || name
[4] == '.');
3169 #endif /* _LIBELF_H_ */