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. */
295 #define UNDEFWEAK_NO_DYNAMIC_RELOC(INFO, H) \
296 ((H)->root.type == bfd_link_hash_undefweak \
297 && (ELF_ST_VISIBILITY ((H)->other) != STV_DEFAULT \
298 || (INFO)->dynamic_undefined_weak == 0))
300 /* Common symbols that are turned into definitions don't have the
301 DEF_REGULAR flag set, so they might appear to be undefined.
302 Symbols defined in linker scripts also don't have DEF_REGULAR set. */
303 #define ELF_COMMON_DEF_P(H) \
305 && !(H)->def_dynamic \
306 && (H)->root.type == bfd_link_hash_defined)
308 /* Records local symbols to be emitted in the dynamic symbol table. */
310 struct elf_link_local_dynamic_entry
312 struct elf_link_local_dynamic_entry
*next
;
314 /* The input bfd this symbol came from. */
317 /* The index of the local symbol being copied. */
320 /* The index in the outgoing dynamic symbol table. */
323 /* A copy of the input symbol. */
324 Elf_Internal_Sym isym
;
327 struct elf_link_loaded_list
329 struct elf_link_loaded_list
*next
;
333 /* Structures used by the eh_frame optimization code. */
338 /* If REMOVED == 1, this is the CIE that the FDE originally used.
339 The CIE belongs to the same .eh_frame input section as the FDE.
341 If REMOVED == 0, this is the CIE that we have chosen to use for
342 the output FDE. The CIE's REMOVED field is also 0, but the CIE
343 might belong to a different .eh_frame input section from the FDE.
345 May be NULL to signify that the FDE should be discarded. */
346 struct eh_cie_fde
*cie_inf
;
347 struct eh_cie_fde
*next_for_section
;
350 /* CIEs have three states:
352 - REMOVED && !MERGED: Slated for removal because we haven't yet
353 proven that an FDE needs it. FULL_CIE, if nonnull, points to
354 more detailed information about the CIE.
356 - REMOVED && MERGED: We have merged this CIE with MERGED_WITH,
357 which may not belong to the same input section.
359 - !REMOVED: We have decided to keep this CIE. SEC is the
360 .eh_frame input section that contains the CIE. */
362 struct cie
*full_cie
;
363 struct eh_cie_fde
*merged_with
;
367 /* The offset of the personality data from the start of the CIE,
368 or 0 if the CIE doesn't have any. */
369 unsigned int personality_offset
: 8;
371 /* Length of augmentation. aug_str_len is the length of the
372 string including null terminator. aug_data_len is the length
373 of the rest up to the initial insns. */
374 unsigned int aug_str_len
: 3;
375 unsigned int aug_data_len
: 5;
377 /* True if we have marked relocations associated with this CIE. */
378 unsigned int gc_mark
: 1;
380 /* True if we have decided to turn an absolute LSDA encoding into
381 a PC-relative one. */
382 unsigned int make_lsda_relative
: 1;
384 /* True if we have decided to turn an absolute personality
385 encoding into a PC-relative one. */
386 unsigned int make_per_encoding_relative
: 1;
388 /* True if the CIE contains personality data and if that
389 data uses a PC-relative encoding. Always true when
390 make_per_encoding_relative is. */
391 unsigned int per_encoding_relative
: 1;
393 /* True if the CIE contains personality data aligned to a
394 multiple of eight bytes. */
395 unsigned int per_encoding_aligned8
: 1;
397 /* True if we need to add an 'R' (FDE encoding) entry to the
398 CIE's augmentation data. */
399 unsigned int add_fde_encoding
: 1;
401 /* True if we have merged this CIE with another. */
402 unsigned int merged
: 1;
405 unsigned int pad1
: 9;
408 unsigned int reloc_index
;
411 unsigned int new_offset
;
412 unsigned int fde_encoding
: 8;
413 unsigned int lsda_encoding
: 8;
414 unsigned int lsda_offset
: 8;
416 /* True if this entry represents a CIE, false if it represents an FDE. */
417 unsigned int cie
: 1;
419 /* True if this entry is currently marked for removal. */
420 unsigned int removed
: 1;
422 /* True if we need to add a 'z' (augmentation size) entry to the CIE's
423 augmentation data, and an associated byte to each of the CIE's FDEs. */
424 unsigned int add_augmentation_size
: 1;
426 /* True if we have decided to convert absolute FDE relocations into
427 relative ones. This applies to the first relocation in the FDE,
428 which is against the code that the FDE describes. */
429 unsigned int make_relative
: 1;
432 unsigned int pad1
: 4;
434 unsigned int *set_loc
;
437 struct eh_frame_sec_info
441 struct eh_cie_fde entry
[1];
444 struct eh_frame_array_ent
453 #define DWARF2_EH_HDR 1
454 #define COMPACT_EH_HDR 2
456 /* Endian-neutral code indicating that a function cannot be unwound. */
457 #define COMPACT_EH_CANT_UNWIND_OPCODE 0x015d5d01
459 struct dwarf_eh_frame_hdr_info
462 unsigned int fde_count
;
463 /* TRUE if .eh_frame_hdr should contain the sorted search table.
464 We build it if we successfully read all .eh_frame input sections
465 and recognize them. */
467 struct eh_frame_array_ent
*array
;
470 struct compact_eh_frame_hdr_info
472 unsigned int allocated_entries
;
473 /* eh_frame_entry fragments. */
477 struct eh_frame_hdr_info
480 unsigned int array_count
;
481 bool frame_hdr_is_compact
;
484 struct dwarf_eh_frame_hdr_info dwarf
;
485 struct compact_eh_frame_hdr_info compact
;
490 /* Enum used to identify target specific extensions to the elf_obj_tdata
491 and elf_link_hash_table structures. Note the enums deliberately start
492 from 1 so that we can detect an uninitialized field. The generic value
493 is last so that additions to this enum do not need to modify more than
497 AARCH64_ELF_DATA
= 1,
538 struct elf_sym_strtab
540 Elf_Internal_Sym sym
;
541 unsigned long dest_index
;
544 struct bfd_link_needed_list
546 struct bfd_link_needed_list
*next
;
554 is_solaris
, /* Solaris. */
555 is_vxworks
, /* VxWorks. */
556 is_nacl
/* Native Client. */
559 /* Used by bfd_sym_from_r_symndx to cache a small number of local
561 #define LOCAL_SYM_CACHE_SIZE 32
565 unsigned long indx
[LOCAL_SYM_CACHE_SIZE
];
566 Elf_Internal_Sym sym
[LOCAL_SYM_CACHE_SIZE
];
569 /* ELF linker hash table. */
571 struct elf_link_hash_table
573 struct bfd_link_hash_table root
;
575 /* An identifier used to distinguish different target
576 specific extensions to this structure. */
577 enum elf_target_id hash_table_id
;
579 /* Whether we have created the special dynamic sections required
580 when linking against or generating a shared object. */
581 bool dynamic_sections_created
;
583 /* Whether dynamic relocations are present. */
586 /* True if this target has relocatable executables, so needs dynamic
588 bool is_relocatable_executable
;
590 /* TRUE if there are IFUNC resolvers. */
591 bool ifunc_resolvers
;
593 /* TRUE if DT_PLTGOT is a required dynamic tag. */
594 bool dt_pltgot_required
;
596 /* TRUE if DT_JMPREL is a required dynamic tag. */
597 bool dt_jmprel_required
;
599 /* The BFD used to hold special sections created by the linker.
600 This will be the first BFD found which requires these sections to
604 /* The value to use when initialising got.refcount/offset and
605 plt.refcount/offset in an elf_link_hash_entry. Set to zero when
606 the values are refcounts. Set to init_got_offset/init_plt_offset
607 in size_dynamic_sections when the values may be offsets. */
608 union gotplt_union init_got_refcount
;
609 union gotplt_union init_plt_refcount
;
611 /* The value to use for got.refcount/offset and plt.refcount/offset
612 when the values may be offsets. Normally (bfd_vma) -1. */
613 union gotplt_union init_got_offset
;
614 union gotplt_union init_plt_offset
;
616 /* The number of symbols found in the link which is intended for the
617 mandatory DT_SYMTAB tag (.dynsym section) in .dynamic section. */
618 bfd_size_type dynsymcount
;
619 bfd_size_type local_dynsymcount
;
621 /* The string table of dynamic symbols, which becomes the .dynstr
623 struct elf_strtab_hash
*dynstr
;
625 /* The array size of the symbol string table, which becomes the
627 bfd_size_type strtabsize
;
629 /* The array of strings, which becomes the .strtab section. */
630 struct elf_sym_strtab
*strtab
;
632 /* The number of buckets in the hash table in the .hash section.
633 This is based on the number of dynamic symbols. */
634 bfd_size_type bucketcount
;
636 /* A linked list of DT_NEEDED names found in dynamic objects
637 included in the link. */
638 struct bfd_link_needed_list
*needed
;
640 /* Sections in the output bfd that provides a section symbol
641 to be used by relocations emitted against local symbols.
642 Most targets will not use data_index_section. */
643 asection
*text_index_section
;
644 asection
*data_index_section
;
646 /* The _GLOBAL_OFFSET_TABLE_ symbol. */
647 struct elf_link_hash_entry
*hgot
;
649 /* The _PROCEDURE_LINKAGE_TABLE_ symbol. */
650 struct elf_link_hash_entry
*hplt
;
652 /* The _DYNAMIC symbol. */
653 struct elf_link_hash_entry
*hdynamic
;
655 /* A pointer to information used to merge SEC_MERGE sections. */
658 /* Used to link stabs in sections. */
659 struct stab_info stab_info
;
661 /* Used by eh_frame code when editing .eh_frame. */
662 struct eh_frame_hdr_info eh_info
;
664 /* A linked list of local symbols to be added to .dynsym. */
665 struct elf_link_local_dynamic_entry
*dynlocal
;
667 /* A linked list of DT_RPATH/DT_RUNPATH names found in dynamic
668 objects included in the link. */
669 struct bfd_link_needed_list
*runpath
;
671 /* Cached first output tls section and size of PT_TLS segment. */
673 bfd_size_type tls_size
; /* Bytes. */
675 /* The offset into splt of the PLT entry for the TLS descriptor
676 resolver. Special values are 0, if not necessary (or not found
677 to be necessary yet), and -1 if needed but not determined
681 /* The GOT offset for the lazy trampoline. Communicated to the
682 loader via DT_TLSDESC_GOT. The magic value (bfd_vma) -1
683 indicates an offset is not allocated. */
686 /* Target OS for linker output. */
687 enum elf_target_os target_os
;
689 /* A linked list of dynamic BFD's loaded in the link. */
690 struct elf_link_loaded_list
*dyn_loaded
;
692 /* Small local sym cache. */
693 struct sym_cache sym_cache
;
695 /* Short-cuts to get to dynamic linker sections. */
704 asection
*sreldynrelro
;
713 /* Returns TRUE if the hash table is a struct elf_link_hash_table. */
716 is_elf_hash_table (const struct bfd_link_hash_table
*htab
)
718 return htab
->type
== bfd_link_elf_hash_table
;
721 /* Look up an entry in an ELF linker hash table. */
723 static inline struct elf_link_hash_entry
*
724 elf_link_hash_lookup (struct elf_link_hash_table
*table
, const char *string
,
725 bool create
, bool copy
, bool follow
)
727 if (ENABLE_CHECKING
&& !is_elf_hash_table (&table
->root
))
729 return (struct elf_link_hash_entry
*)
730 bfd_link_hash_lookup (&table
->root
, string
, create
, copy
, follow
);
733 /* Traverse an ELF linker hash table. */
736 elf_link_hash_traverse (struct elf_link_hash_table
*table
,
737 bool (*f
) (struct elf_link_hash_entry
*, void *),
740 if (ENABLE_CHECKING
&& !is_elf_hash_table (&table
->root
))
742 bfd_link_hash_traverse (&table
->root
,
743 (bool (*) (struct bfd_link_hash_entry
*, void *)) f
,
747 /* Get the ELF linker hash table from a link_info structure. */
749 static inline struct elf_link_hash_table
*
750 elf_hash_table (const struct bfd_link_info
*info
)
752 return (struct elf_link_hash_table
*) info
->hash
;
755 static inline enum elf_target_id
756 elf_hash_table_id (const struct elf_link_hash_table
*table
)
758 return table
->hash_table_id
;
761 /* Constant information held for an ELF backend. */
763 struct elf_size_info
{
764 unsigned char sizeof_ehdr
, sizeof_phdr
, sizeof_shdr
;
765 unsigned char sizeof_rel
, sizeof_rela
, sizeof_sym
, sizeof_dyn
, sizeof_note
;
767 /* The size of entries in the .hash section. */
768 unsigned char sizeof_hash_entry
;
770 /* The number of internal relocations to allocate per external
772 unsigned char int_rels_per_ext_rel
;
773 /* We use some fixed size arrays. This should be large enough to
774 handle all back-ends. */
775 #define MAX_INT_RELS_PER_EXT_REL 3
777 unsigned char arch_size
, log_file_align
;
778 unsigned char elfclass
, ev_current
;
779 int (*write_out_phdrs
)
780 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
781 bool (*write_shdrs_and_ehdr
) (bfd
*);
782 bool (*checksum_contents
)
783 (bfd
* , void (*) (const void *, size_t, void *), void *);
785 (bfd
*, asection
*, void *);
786 bool (*swap_symbol_in
)
787 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
788 void (*swap_symbol_out
)
789 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
790 bool (*slurp_reloc_table
)
791 (bfd
*, asection
*, asymbol
**, bool);
792 long (*slurp_symbol_table
)
793 (bfd
*, asymbol
**, bool);
795 (bfd
*, const void *, Elf_Internal_Dyn
*);
797 (bfd
*, const Elf_Internal_Dyn
*, void *);
799 /* This function is called to swap in a REL relocation. If an
800 external relocation corresponds to more than one internal
801 relocation, then all relocations are swapped in at once. */
802 void (*swap_reloc_in
)
803 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
805 /* This function is called to swap out a REL relocation. */
806 void (*swap_reloc_out
)
807 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
809 /* This function is called to swap in a RELA relocation. If an
810 external relocation corresponds to more than one internal
811 relocation, then all relocations are swapped in at once. */
812 void (*swap_reloca_in
)
813 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
815 /* This function is called to swap out a RELA relocation. */
816 void (*swap_reloca_out
)
817 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
820 #define elf_symbol_from(S) \
821 ((((S)->flags & BSF_SYNTHETIC) == 0 \
822 && (S)->the_bfd != NULL \
823 && (S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \
824 && (S)->the_bfd->tdata.elf_obj_data != 0) \
825 ? (elf_symbol_type *) (S) \
828 enum elf_reloc_type_class
{
830 reloc_class_relative
,
836 struct elf_reloc_cookie
838 Elf_Internal_Rela
*rels
, *rel
, *relend
;
839 Elf_Internal_Sym
*locsyms
;
843 struct elf_link_hash_entry
**sym_hashes
;
848 /* The level of IRIX compatibility we're striving for. */
856 /* Mapping of ELF section names and types. */
857 struct bfd_elf_special_section
860 unsigned int prefix_length
;
861 /* 0 means name must match PREFIX exactly.
862 -1 means name must start with PREFIX followed by an arbitrary string.
863 -2 means name must match PREFIX exactly or consist of PREFIX followed
864 by a dot then anything.
865 > 0 means name must start with the first PREFIX_LENGTH chars of
866 PREFIX and finish with the last SUFFIX_LENGTH chars of PREFIX. */
867 signed int suffix_length
;
872 enum action_discarded
878 typedef asection
* (*elf_gc_mark_hook_fn
)
879 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
880 struct elf_link_hash_entry
*, Elf_Internal_Sym
*);
882 enum elf_property_kind
884 /* A new property. */
885 property_unknown
= 0,
886 /* A property ignored by backend. */
888 /* A corrupt property reported by backend. */
890 /* A property should be removed due to property merge. */
892 /* A property which is a number. */
896 typedef struct elf_property
898 unsigned int pr_type
;
899 unsigned int pr_datasz
;
902 /* For property_number, this is a number. */
904 /* Add a new one if elf_property_kind is updated. */
906 enum elf_property_kind pr_kind
;
909 typedef struct elf_property_list
911 struct elf_property_list
*next
;
912 struct elf_property property
;
915 struct bfd_elf_section_reloc_data
;
917 struct elf_backend_data
919 /* The architecture for this backend. */
920 enum bfd_architecture arch
;
922 /* An identifier used to distinguish different target specific
923 extensions to elf_obj_tdata and elf_link_hash_table structures. */
924 enum elf_target_id target_id
;
927 enum elf_target_os target_os
;
929 /* The ELF machine code (EM_xxxx) for this backend. */
930 int elf_machine_code
;
935 /* The maximum page size for this backend. */
938 /* The minimum page size for this backend. An input object will not be
939 considered page aligned unless its sections are correctly aligned for
940 pages at least this large. May be smaller than maxpagesize. */
943 /* The common page size for this backend. */
944 bfd_vma commonpagesize
;
946 /* The value of commonpagesize to use when -z relro for this backend. */
947 bfd_vma relropagesize
;
949 /* The p_align value for this backend. If it is set, p_align of
950 PT_LOAD alignment will be to p_align by default. */
953 /* The BFD flags applied to sections created for dynamic linking. */
954 flagword dynamic_sec_flags
;
956 /* Architecture-specific data for this backend.
957 This is actually a pointer to some type like struct elf_ARCH_data. */
958 const void *arch_data
;
960 /* A function to translate an ELF RELA relocation to a BFD arelent
961 structure. Returns TRUE upon success, FALSE otherwise. */
962 bool (*elf_info_to_howto
)
963 (bfd
*, arelent
*, Elf_Internal_Rela
*);
965 /* A function to translate an ELF REL relocation to a BFD arelent
966 structure. Returns TRUE upon success, FALSE otherwise. */
967 bool (*elf_info_to_howto_rel
)
968 (bfd
*, arelent
*, Elf_Internal_Rela
*);
970 /* A function to determine whether a symbol is global when
971 partitioning the symbol table into local and global symbols.
972 This should be NULL for most targets, in which case the correct
973 thing will be done. MIPS ELF, at least on the Irix 5, has
974 special requirements. */
975 bool (*elf_backend_sym_is_global
)
978 /* The remaining functions are hooks which are called only if they
981 /* A function to permit a backend specific check on whether a
982 particular BFD format is relevant for an object file, and to
983 permit the backend to set any global information it wishes. When
984 this is called elf_elfheader is set, but anything else should be
985 used with caution. If this returns FALSE, the check_format
986 routine will return a bfd_error_wrong_format error. */
987 bool (*elf_backend_object_p
)
990 /* A function to do additional symbol processing when reading the
991 ELF symbol table. This is where any processor-specific special
992 section indices are handled. */
993 void (*elf_backend_symbol_processing
)
996 /* A function to do additional symbol processing after reading the
997 entire ELF symbol table. */
998 bool (*elf_backend_symbol_table_processing
)
999 (bfd
*, elf_symbol_type
*, unsigned int);
1001 /* A function to set the type of the info field. Processor-specific
1002 types should be handled here. */
1003 int (*elf_backend_get_symbol_type
)
1004 (Elf_Internal_Sym
*, int);
1006 /* A function to return the linker hash table entry of a symbol that
1007 might be satisfied by an archive symbol. */
1008 struct bfd_link_hash_entry
* (*elf_backend_archive_symbol_lookup
)
1009 (bfd
*, struct bfd_link_info
*, const char *);
1011 /* Return true if local section symbols should have a non-null st_name.
1012 NULL implies false. */
1013 bool (*elf_backend_name_local_section_symbols
)
1016 /* A function to do additional processing on the ELF section header
1017 just before writing it out. This is used to set the flags and
1018 type fields for some sections, or to actually write out data for
1019 unusual sections. */
1020 bool (*elf_backend_section_processing
)
1021 (bfd
*, Elf_Internal_Shdr
*);
1023 /* A function to handle unusual section types when creating BFD
1024 sections from ELF sections. */
1025 bool (*elf_backend_section_from_shdr
)
1026 (bfd
*, Elf_Internal_Shdr
*, const char *, int);
1028 /* A function to convert machine dependent ELF section header flags to
1029 BFD internal section header flags. */
1030 bool (*elf_backend_section_flags
)
1031 (const Elf_Internal_Shdr
*);
1033 /* A function that returns a struct containing ELF section flags and
1034 type for the given BFD section. */
1035 const struct bfd_elf_special_section
* (*get_sec_type_attr
)
1036 (bfd
*, asection
*);
1038 /* A function to handle unusual program segment types when creating BFD
1039 sections from ELF program segments. */
1040 bool (*elf_backend_section_from_phdr
)
1041 (bfd
*, Elf_Internal_Phdr
*, int, const char *);
1043 /* A function to set up the ELF section header for a BFD section in
1044 preparation for writing it out. This is where the flags and type
1045 fields are set for unusual sections. */
1046 bool (*elf_backend_fake_sections
)
1047 (bfd
*, Elf_Internal_Shdr
*, asection
*);
1049 /* A function to get the ELF section index for a BFD section. If
1050 this returns TRUE, the section was found. If it is a normal ELF
1051 section, *RETVAL should be left unchanged. If it is not a normal
1052 ELF section *RETVAL should be set to the SHN_xxxx index. */
1053 bool (*elf_backend_section_from_bfd_section
)
1054 (bfd
*, asection
*, int *retval
);
1056 /* If this field is not NULL, it is called by the add_symbols phase
1057 of a link just before adding a symbol to the global linker hash
1058 table. It may modify any of the fields as it wishes. If *NAME
1059 is set to NULL, the symbol will be skipped rather than being
1060 added to the hash table. This function is responsible for
1061 handling all processor dependent symbol bindings and section
1062 indices, and must set at least *FLAGS and *SEC for each processor
1063 dependent case; failure to do so will cause a link error. */
1064 bool (*elf_add_symbol_hook
)
1065 (bfd
*abfd
, struct bfd_link_info
*info
, Elf_Internal_Sym
*,
1066 const char **name
, flagword
*flags
, asection
**sec
, bfd_vma
*value
);
1068 /* If this field is not NULL, it is called by the elf_link_output_sym
1069 phase of a link for each symbol which will appear in the object file.
1070 On error, this function returns 0. 1 is returned when the symbol
1071 should be output, 2 is returned when the symbol should be discarded. */
1072 int (*elf_backend_link_output_symbol_hook
)
1073 (struct bfd_link_info
*info
, const char *, Elf_Internal_Sym
*,
1074 asection
*, struct elf_link_hash_entry
*);
1076 /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend
1077 linker the first time it encounters a dynamic object in the link.
1078 This function must create any sections required for dynamic
1079 linking. The ABFD argument is a dynamic object. The .interp,
1080 .dynamic, .dynsym, .dynstr, and .hash functions have already been
1081 created, and this function may modify the section flags if
1082 desired. This function will normally create the .got and .plt
1083 sections, but different backends have different requirements. */
1084 bool (*elf_backend_create_dynamic_sections
)
1085 (bfd
*abfd
, struct bfd_link_info
*info
);
1087 /* When creating a shared library, determine whether to omit the
1088 dynamic symbol for the section. */
1089 bool (*elf_backend_omit_section_dynsym
)
1090 (bfd
*output_bfd
, struct bfd_link_info
*info
, asection
*osec
);
1092 /* Return TRUE if relocations of targets are compatible to the extent
1093 that CHECK_RELOCS will properly process them. PR 4424. */
1094 bool (*relocs_compatible
) (const bfd_target
*, const bfd_target
*);
1096 /* The CHECK_RELOCS function is called after all input files have been
1097 opened. It is called once for each section with relocs of an object
1098 file. The function must look through the relocs and do any special
1099 handling required. This generally means allocating space in the
1100 global offset table, and perhaps allocating space for a reloc. The
1101 relocs are always passed as Rela structures; if the section
1102 actually uses Rel structures, the r_addend field will always be
1104 bool (*check_relocs
)
1105 (bfd
*abfd
, struct bfd_link_info
*info
, asection
*o
,
1106 const Elf_Internal_Rela
*relocs
);
1108 /* The CHECK_DIRECTIVES function is called once per input file by
1109 the add_symbols phase of the ELF backend linker. The function
1110 must inspect the bfd and create any additional symbols according
1111 to any custom directives in the bfd. */
1112 bool (*check_directives
)
1113 (bfd
*abfd
, struct bfd_link_info
*info
);
1115 /* The NOTICE_AS_NEEDED function is called as the linker is about to
1116 handle an as-needed lib (ACT = notice_as_needed), and after the
1117 linker has decided to keep the lib (ACT = notice_needed) or when
1118 the lib is not needed (ACT = notice_not_needed). */
1119 bool (*notice_as_needed
)
1120 (bfd
*abfd
, struct bfd_link_info
*info
, enum notice_asneeded_action act
);
1122 /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
1123 linker for every symbol which is defined by a dynamic object and
1124 referenced by a regular object. This is called after all the
1125 input files have been seen, but before the SIZE_DYNAMIC_SECTIONS
1126 function has been called. The hash table entry should be
1127 bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be
1128 defined in a section from a dynamic object. Dynamic object
1129 sections are not included in the final link, and this function is
1130 responsible for changing the value to something which the rest of
1131 the link can deal with. This will normally involve adding an
1132 entry to the .plt or .got or some such section, and setting the
1133 symbol to point to that. */
1134 bool (*elf_backend_adjust_dynamic_symbol
)
1135 (struct bfd_link_info
*info
, struct elf_link_hash_entry
*h
);
1137 /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker
1138 after all the linker input files have been seen but before the
1139 section sizes have been set. This is called after
1140 ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS. */
1141 bool (*elf_backend_always_size_sections
)
1142 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1144 /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend
1145 linker after all the linker input files have been seen but before
1146 the sections sizes have been set. This is called after
1147 ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols.
1148 It is only called when linking against a dynamic object. It must
1149 set the sizes of the dynamic sections, and may fill in their
1150 contents as well. The generic ELF linker can handle the .dynsym,
1151 .dynstr and .hash sections. This function must handle the
1152 .interp section and any sections created by the
1153 CREATE_DYNAMIC_SECTIONS entry point. */
1154 bool (*elf_backend_size_dynamic_sections
)
1155 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1157 /* The STRIP_ZERO_SIZED_DYNAMIC_SECTIONS function is called by the
1158 ELF backend linker to strip zero-sized dynamic sections after
1159 the section sizes have been set. */
1160 bool (*elf_backend_strip_zero_sized_dynamic_sections
)
1161 (struct bfd_link_info
*info
);
1163 /* Set TEXT_INDEX_SECTION and DATA_INDEX_SECTION, the output sections
1164 we keep to use as a base for relocs and symbols. */
1165 void (*elf_backend_init_index_section
)
1166 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1168 /* The RELOCATE_SECTION function is called by the ELF backend linker
1169 to handle the relocations for a section.
1171 The relocs are always passed as Rela structures; if the section
1172 actually uses Rel structures, the r_addend field will always be
1175 This function is responsible for adjust the section contents as
1176 necessary, and (if using Rela relocs and generating a
1177 relocatable output file) adjusting the reloc addend as
1180 This function does not have to worry about setting the reloc
1181 address or the reloc symbol index.
1183 LOCAL_SYMS is a pointer to the swapped in local symbols.
1185 LOCAL_SECTIONS is an array giving the section in the input file
1186 corresponding to the st_shndx field of each local symbol.
1188 The global hash table entry for the global symbols can be found
1189 via elf_sym_hashes (input_bfd).
1191 When generating relocatable output, this function must handle
1192 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
1193 going to be the section symbol corresponding to the output
1194 section, which means that the addend must be adjusted
1197 Returns FALSE on error, TRUE on success, 2 if successful and
1198 relocations should be written for this section. */
1199 int (*elf_backend_relocate_section
)
1200 (bfd
*output_bfd
, struct bfd_link_info
*info
, bfd
*input_bfd
,
1201 asection
*input_section
, bfd_byte
*contents
, Elf_Internal_Rela
*relocs
,
1202 Elf_Internal_Sym
*local_syms
, asection
**local_sections
);
1204 /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend
1205 linker just before it writes a symbol out to the .dynsym section.
1206 The processor backend may make any required adjustment to the
1207 symbol. It may also take the opportunity to set contents of the
1208 dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on
1209 all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called
1210 on those symbols which are defined by a dynamic object. */
1211 bool (*elf_backend_finish_dynamic_symbol
)
1212 (bfd
*output_bfd
, struct bfd_link_info
*info
,
1213 struct elf_link_hash_entry
*h
, Elf_Internal_Sym
*sym
);
1215 /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend
1216 linker just before it writes all the dynamic sections out to the
1217 output file. The FINISH_DYNAMIC_SYMBOL will have been called on
1218 all dynamic symbols. */
1219 bool (*elf_backend_finish_dynamic_sections
)
1220 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1222 /* A function to do any beginning processing needed for the ELF file
1223 before building the ELF headers and computing file positions. */
1224 void (*elf_backend_begin_write_processing
)
1225 (bfd
*, struct bfd_link_info
*);
1227 /* A function to do any final processing needed for the ELF file
1228 before writing it out. */
1229 bool (*elf_backend_final_write_processing
)
1232 /* This function is called by get_program_header_size. It should
1233 return the number of additional program segments which this BFD
1234 will need. It should return -1 on error. */
1235 int (*elf_backend_additional_program_headers
)
1236 (bfd
*, struct bfd_link_info
*);
1238 /* This function is called to modify an existing segment map in a
1239 backend specific fashion. */
1240 bool (*elf_backend_modify_segment_map
)
1241 (bfd
*, struct bfd_link_info
*);
1243 /* This function is called to modify program headers just before
1244 they are written. */
1245 bool (*elf_backend_modify_headers
)
1246 (bfd
*, struct bfd_link_info
*);
1248 /* This function is called to see if the PHDR header should be
1249 checked for validity. */
1250 bool (*elf_backend_allow_non_load_phdr
)
1251 (bfd
*, const Elf_Internal_Phdr
*, unsigned);
1253 /* This function is called before section garbage collection to
1254 mark entry symbol sections. */
1256 (struct bfd_link_info
*);
1258 /* This function is called during section garbage collection to
1259 mark sections that define global symbols. */
1260 bool (*gc_mark_dynamic_ref
)
1261 (struct elf_link_hash_entry
*, void *);
1263 /* This function is called during section gc to discover the section a
1264 particular relocation refers to. */
1265 elf_gc_mark_hook_fn gc_mark_hook
;
1267 /* This function, if defined, is called after the first gc marking pass
1268 to allow the backend to mark additional sections. */
1269 bool (*gc_mark_extra_sections
)
1270 (struct bfd_link_info
*, elf_gc_mark_hook_fn
);
1272 /* This function is called to initialise ELF file header info.
1273 Customised versions can modify things like the OS and ABI version. */
1274 bool (*elf_backend_init_file_header
)
1275 (bfd
*, struct bfd_link_info
*);
1277 /* This function, if defined, prints a symbol to file and returns the
1278 name of the symbol to be printed. It should return NULL to fall
1279 back to default symbol printing. */
1280 const char *(*elf_backend_print_symbol_all
)
1281 (bfd
*, void *, asymbol
*);
1283 /* This function, if defined, is called after all local symbols and
1284 global symbols converted to locals are emitted into the symtab
1285 section. It allows the backend to emit special local symbols
1286 not handled in the hash table. */
1287 bool (*elf_backend_output_arch_local_syms
)
1288 (bfd
*, struct bfd_link_info
*, void *,
1289 int (*) (void *, const char *, Elf_Internal_Sym
*, asection
*,
1290 struct elf_link_hash_entry
*));
1292 /* This function, if defined, is called after all symbols are emitted
1293 into the symtab section. It allows the backend to emit special
1294 global symbols not handled in the hash table. */
1295 bool (*elf_backend_output_arch_syms
)
1296 (bfd
*, struct bfd_link_info
*, void *,
1297 int (*) (void *, const char *, Elf_Internal_Sym
*, asection
*,
1298 struct elf_link_hash_entry
*));
1300 /* Filter what symbols of the output file to include in the import
1301 library if one is created. */
1302 unsigned int (*elf_backend_filter_implib_symbols
)
1303 (bfd
*, struct bfd_link_info
*, asymbol
**, long);
1305 /* Copy any information related to dynamic linking from a pre-existing
1306 symbol to a newly created symbol. Also called to copy flags and
1307 other back-end info to a weakdef, in which case the symbol is not
1308 newly created and plt/got refcounts and dynamic indices should not
1310 void (*elf_backend_copy_indirect_symbol
)
1311 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
1312 struct elf_link_hash_entry
*);
1314 /* Modify any information related to dynamic linking such that the
1315 symbol is not exported. */
1316 void (*elf_backend_hide_symbol
)
1317 (struct bfd_link_info
*, struct elf_link_hash_entry
*, bool);
1319 /* A function to do additional symbol fixup, called by
1320 _bfd_elf_fix_symbol_flags. */
1321 bool (*elf_backend_fixup_symbol
)
1322 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
1324 /* Merge the backend specific symbol attribute. */
1325 void (*elf_backend_merge_symbol_attribute
)
1326 (struct elf_link_hash_entry
*, unsigned int, bool, bool);
1328 /* This function, if defined, will return a string containing the
1329 name of a target-specific dynamic tag. */
1330 char *(*elf_backend_get_target_dtag
)
1333 /* Decide whether an undefined symbol is special and can be ignored.
1334 This is the case for OPTIONAL symbols on IRIX. */
1335 bool (*elf_backend_ignore_undef_symbol
)
1336 (struct elf_link_hash_entry
*);
1338 /* Emit relocations. Overrides default routine for emitting relocs,
1339 except during a relocatable link, or if all relocs are being emitted. */
1340 bool (*elf_backend_emit_relocs
)
1341 (bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*,
1342 struct elf_link_hash_entry
**);
1344 /* Update relocations. It is allowed to change the number and the order.
1345 In such a case hashes should be invalidated. */
1346 void (*elf_backend_update_relocs
)
1347 (asection
*, struct bfd_elf_section_reloc_data
*);
1349 /* Count relocations. Not called for relocatable links
1350 or if all relocs are being preserved in the output. */
1351 unsigned int (*elf_backend_count_relocs
)
1352 (struct bfd_link_info
*, asection
*);
1354 /* Count additionals relocations. Called for relocatable links if
1355 additional relocations needs to be created. */
1356 unsigned int (*elf_backend_count_additional_relocs
)
1359 /* Say whether to sort relocs output by ld -r and ld --emit-relocs,
1360 by r_offset. If NULL, default to true. */
1361 bool (*sort_relocs_p
)
1364 /* This function, if defined, is called when an NT_PRSTATUS note is found
1366 bool (*elf_backend_grok_prstatus
)
1367 (bfd
*, Elf_Internal_Note
*);
1369 /* This function, if defined, is called when an NT_PSINFO or NT_PRPSINFO
1370 note is found in a core file. */
1371 bool (*elf_backend_grok_psinfo
)
1372 (bfd
*, Elf_Internal_Note
*);
1374 /* This function, if defined, is called when a "FreeBSD" NT_PRSTATUS
1375 note is found in a core file. */
1376 bool (*elf_backend_grok_freebsd_prstatus
)
1377 (bfd
*, Elf_Internal_Note
*);
1379 /* This function, if defined, is called to write a note to a corefile. */
1380 char *(*elf_backend_write_core_note
)
1381 (bfd
*abfd
, char *buf
, int *bufsiz
, int note_type
, ...);
1383 /* This function, if defined, is called to convert target-specific
1384 section flag names into hex values. */
1385 flagword (*elf_backend_lookup_section_flags_hook
)
1388 /* This function returns class of a reloc type. */
1389 enum elf_reloc_type_class (*elf_backend_reloc_type_class
)
1390 (const struct bfd_link_info
*, const asection
*, const Elf_Internal_Rela
*);
1392 /* This function, if defined, removes information about discarded functions
1393 from other sections which mention them. */
1394 bool (*elf_backend_discard_info
)
1395 (bfd
*, struct elf_reloc_cookie
*, struct bfd_link_info
*);
1397 /* This function, if defined, signals that the function above has removed
1398 the discarded relocations for this section. */
1399 bool (*elf_backend_ignore_discarded_relocs
)
1402 /* What to do when ld finds relocations against symbols defined in
1403 discarded sections. */
1404 unsigned int (*action_discarded
)
1407 /* This function returns the width of FDE pointers in bytes, or 0 if
1408 that can't be determined for some reason. The default definition
1409 goes by the bfd's EI_CLASS. */
1410 unsigned int (*elf_backend_eh_frame_address_size
)
1411 (bfd
*, const asection
*);
1413 /* These functions tell elf-eh-frame whether to attempt to turn
1414 absolute or lsda encodings into pc-relative ones. The default
1415 definition enables these transformations. */
1416 bool (*elf_backend_can_make_relative_eh_frame
)
1417 (bfd
*, struct bfd_link_info
*, asection
*);
1418 bool (*elf_backend_can_make_lsda_relative_eh_frame
)
1419 (bfd
*, struct bfd_link_info
*, asection
*);
1421 /* This function returns an encoding after computing the encoded
1422 value (and storing it in ENCODED) for the given OFFSET into OSEC,
1423 to be stored in at LOC_OFFSET into the LOC_SEC input section.
1424 The default definition chooses a 32-bit PC-relative encoding. */
1425 bfd_byte (*elf_backend_encode_eh_address
)
1426 (bfd
*abfd
, struct bfd_link_info
*info
,
1427 asection
*osec
, bfd_vma offset
,
1428 asection
*loc_sec
, bfd_vma loc_offset
,
1431 /* This function, if defined, may write out the given section.
1432 Returns TRUE if it did so and FALSE if the caller should. */
1433 bool (*elf_backend_write_section
)
1434 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
1436 /* This function, if defined, returns TRUE if it is section symbols
1437 only that are considered local for the purpose of partitioning the
1438 symbol table into local and global symbols. This should be NULL
1439 for most targets, in which case the correct thing will be done.
1440 MIPS ELF, at least on the Irix 5, has special requirements. */
1441 bool (*elf_backend_elfsym_local_is_section
)
1444 /* The level of IRIX compatibility we're striving for.
1445 MIPS ELF specific function. */
1446 irix_compat_t (*elf_backend_mips_irix_compat
)
1449 reloc_howto_type
*(*elf_backend_mips_rtype_to_howto
)
1450 (bfd
*, unsigned int, bool);
1452 /* The swapping table to use when dealing with ECOFF information.
1453 Used for the MIPS ELF .mdebug section. */
1454 const struct ecoff_debug_swap
*elf_backend_ecoff_debug_swap
;
1456 /* This function implements `bfd_elf_bfd_from_remote_memory';
1457 see elf.c, elfcode.h. */
1458 bfd
*(*elf_backend_bfd_from_remote_memory
)
1459 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
1460 int (*target_read_memory
) (bfd_vma vma
, bfd_byte
*myaddr
,
1461 bfd_size_type len
));
1463 bool (*elf_backend_core_find_build_id
) (bfd
*, bfd_vma
);
1465 /* This function is used by `_bfd_elf_get_synthetic_symtab';
1467 bfd_vma (*plt_sym_val
) (bfd_vma
, const asection
*, const arelent
*);
1469 /* Is symbol defined in common section? */
1470 bool (*common_definition
) (Elf_Internal_Sym
*);
1472 /* Return a common section index for section. */
1473 unsigned int (*common_section_index
) (asection
*);
1475 /* Return a common section for section. */
1476 asection
*(*common_section
) (asection
*);
1478 /* Return TRUE if we can merge 2 definitions. */
1479 bool (*merge_symbol
) (struct elf_link_hash_entry
*,
1480 const Elf_Internal_Sym
*, asection
**,
1482 bfd
*, const asection
*);
1484 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
1485 bool (*elf_hash_symbol
) (struct elf_link_hash_entry
*);
1487 /* If non-NULL, called to register the location of XLAT_LOC within
1488 .MIPS.xhash at which real final dynindx for H will be written.
1489 If XLAT_LOC is zero, the symbol is not included in
1490 .MIPS.xhash and no dynindx will be written. */
1491 void (*record_xhash_symbol
)
1492 (struct elf_link_hash_entry
*h
, bfd_vma xlat_loc
);
1494 /* Return TRUE if type is a function symbol type. */
1495 bool (*is_function_type
) (unsigned int type
);
1497 /* If the ELF symbol SYM might be a function in SEC, return the
1498 function size and set *CODE_OFF to the function's entry point,
1499 otherwise return zero. */
1500 bfd_size_type (*maybe_function_sym
) (const asymbol
*sym
, asection
*sec
,
1503 /* Given NAME, the name of a relocation section stripped of its
1504 .rel/.rela prefix, return the section in ABFD to which the
1505 relocations apply. */
1506 asection
*(*get_reloc_section
) (bfd
*abfd
, const char *name
);
1508 /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
1509 has a type >= SHT_LOOS. Returns TRUE if the fields were initialised,
1510 FALSE otherwise. Can be called multiple times for a given section,
1511 until it returns TRUE. Most of the times it is called ISECTION will be
1512 set to an input section that might be associated with the output section.
1513 The last time that it is called, ISECTION will be set to NULL. */
1514 bool (*elf_backend_copy_special_section_fields
)
1515 (const bfd
*ibfd
, bfd
*obfd
, const Elf_Internal_Shdr
*isection
,
1516 Elf_Internal_Shdr
*osection
);
1518 /* Used to handle bad SHF_LINK_ORDER input. */
1519 void (*link_order_error_handler
) (const char *, ...);
1521 /* Name of the PLT relocation section. */
1522 const char *relplt_name
;
1524 /* Alternate EM_xxxx machine codes for this backend. */
1525 int elf_machine_alt1
;
1526 int elf_machine_alt2
;
1528 const struct elf_size_info
*s
;
1530 /* An array of target specific special sections. */
1531 const struct bfd_elf_special_section
*special_sections
;
1533 /* The size in bytes of the header for the GOT. This includes the
1534 so-called reserved entries on some systems. */
1535 bfd_vma got_header_size
;
1537 /* The size of the GOT entry for the symbol pointed to by H if non-NULL,
1538 otherwise by the local symbol with index SYMNDX in IBFD. */
1539 bfd_vma (*got_elt_size
) (bfd
*, struct bfd_link_info
*,
1540 struct elf_link_hash_entry
*h
,
1541 bfd
*ibfd
, unsigned long symndx
);
1543 /* The vendor name to use for a processor-standard attributes section. */
1544 const char *obj_attrs_vendor
;
1546 /* The section name to use for a processor-standard attributes section. */
1547 const char *obj_attrs_section
;
1549 /* Return 1, 2 or 3 to indicate what type of arguments a
1550 processor-specific tag takes. */
1551 int (*obj_attrs_arg_type
) (int);
1553 /* The section type to use for an attributes section. */
1554 unsigned int obj_attrs_section_type
;
1556 /* This function determines the order in which any attributes are
1557 written. It must be defined for input in the range
1558 LEAST_KNOWN_OBJ_ATTRIBUTE..NUM_KNOWN_OBJ_ATTRIBUTES-1 (this range
1559 is used in order to make unity easy). The returned value is the
1560 actual tag number to place in the input position. */
1561 int (*obj_attrs_order
) (int);
1563 /* Handle merging unknown attributes; either warn and return TRUE,
1564 or give an error and return FALSE. */
1565 bool (*obj_attrs_handle_unknown
) (bfd
*, int);
1567 /* Parse GNU properties. Return the property kind. If the property
1568 is corrupt, issue an error message and return property_corrupt. */
1569 enum elf_property_kind (*parse_gnu_properties
) (bfd
*, unsigned int,
1573 /* Merge GNU properties. Return TRUE if property is updated. */
1574 bool (*merge_gnu_properties
) (struct bfd_link_info
*, bfd
*, bfd
*,
1575 elf_property
*, elf_property
*);
1577 /* Set up GNU properties. */
1578 bfd
*(*setup_gnu_properties
) (struct bfd_link_info
*);
1580 /* Fix up GNU properties. */
1581 void (*fixup_gnu_properties
) (struct bfd_link_info
*,
1582 elf_property_list
**);
1584 /* Encoding used for compact EH tables. */
1585 int (*compact_eh_encoding
) (struct bfd_link_info
*);
1587 /* Opcode representing no unwind. */
1588 int (*cant_unwind_opcode
) (struct bfd_link_info
*);
1590 /* Called when emitting an ELF symbol whoes input version had an
1591 ST_SHNDX field set to a value in the range SHN_LOPROC..SHN_HIOS.
1592 Returns the value to be installed in the ST_SHNDX field of the
1593 emitted symbol. If not defined, the value is left unchanged. */
1594 unsigned int (*symbol_section_index
) (bfd
*, elf_symbol_type
*);
1596 /* Called when a section has extra reloc sections. */
1597 bool (*init_secondary_reloc_section
) (bfd
*, Elf_Internal_Shdr
*,
1598 const char *, unsigned int);
1600 /* Called when after loading the normal relocs for a section. */
1601 bool (*slurp_secondary_relocs
) (bfd
*, asection
*, asymbol
**, bool);
1603 /* Called after writing the normal relocs for a section. */
1604 bool (*write_secondary_relocs
) (bfd
*, asection
*);
1606 /* This is non-zero if static TLS segments require a special alignment. */
1607 unsigned static_tls_alignment
;
1609 /* Alignment for the PT_GNU_STACK segment. */
1610 unsigned stack_align
;
1612 /* Flag bits to assign to a section of type SHT_STRTAB. */
1613 unsigned long elf_strtab_flags
;
1615 /* This is TRUE if the linker should act like collect and gather
1616 global constructors and destructors by name. This is TRUE for
1617 MIPS ELF because the Irix 5 tools can not handle the .init
1619 unsigned collect
: 1;
1621 /* This is TRUE if the linker should ignore changes to the type of a
1622 symbol. This is TRUE for MIPS ELF because some Irix 5 objects
1623 record undefined functions as STT_OBJECT although the definitions
1625 unsigned type_change_ok
: 1;
1627 /* Whether the backend may use REL relocations. (Some backends use
1628 both REL and RELA relocations, and this flag is set for those
1630 unsigned may_use_rel_p
: 1;
1632 /* Whether the backend may use RELA relocations. (Some backends use
1633 both REL and RELA relocations, and this flag is set for those
1635 unsigned may_use_rela_p
: 1;
1637 /* Whether the default relocation type is RELA. If a backend with
1638 this flag set wants REL relocations for a particular section,
1639 it must note that explicitly. Similarly, if this flag is clear,
1640 and the backend wants RELA relocations for a particular
1642 unsigned default_use_rela_p
: 1;
1644 /* True if PLT and copy relocations should be RELA by default. */
1645 unsigned rela_plts_and_copies_p
: 1;
1647 /* Set if RELA relocations for a relocatable link can be handled by
1648 generic code. Backends that set this flag need do nothing in the
1649 backend relocate_section routine for relocatable linking. */
1650 unsigned rela_normal
: 1;
1652 /* Set if DT_REL/DT_RELA/DT_RELSZ/DT_RELASZ should not include PLT
1654 unsigned dtrel_excludes_plt
: 1;
1656 /* TRUE if addresses "naturally" sign extend. This is used when
1657 swapping in from Elf32 when BFD64. */
1658 unsigned sign_extend_vma
: 1;
1660 unsigned want_got_plt
: 1;
1661 unsigned plt_readonly
: 1;
1662 unsigned want_plt_sym
: 1;
1663 unsigned plt_not_loaded
: 1;
1664 unsigned plt_alignment
: 4;
1665 unsigned can_gc_sections
: 1;
1666 unsigned can_refcount
: 1;
1667 unsigned want_got_sym
: 1;
1668 unsigned want_dynbss
: 1;
1669 unsigned want_dynrelro
: 1;
1671 /* Targets which do not support physical addressing often require
1672 that the p_paddr field in the section header to be set to zero.
1673 This field indicates whether this behavior is required. */
1674 unsigned want_p_paddr_set_to_zero
: 1;
1676 /* Target has broken hardware and/or kernel that requires pages not
1677 to be mapped twice with different permissions. */
1678 unsigned no_page_alias
: 1;
1680 /* True if an object file lacking a .note.GNU-stack section
1681 should be assumed to be requesting exec stack. At least one
1682 other file in the link needs to have a .note.GNU-stack section
1683 for a PT_GNU_STACK segment to be created. */
1684 unsigned default_execstack
: 1;
1686 /* True if elf_section_data(sec)->this_hdr.contents is sec->rawsize
1687 in length rather than sec->size in length, if sec->rawsize is
1688 non-zero and smaller than sec->size. */
1689 unsigned caches_rawsize
: 1;
1691 /* Address of protected data defined in the shared library may be
1692 external, i.e., due to copy relocation. */
1693 unsigned extern_protected_data
: 1;
1695 /* True if `_bfd_elf_link_renumber_dynsyms' must be called even for
1697 unsigned always_renumber_dynsyms
: 1;
1699 /* True if the 32-bit Linux PRPSINFO structure's `pr_uid' and `pr_gid'
1700 members use a 16-bit data type. */
1701 unsigned linux_prpsinfo32_ugid16
: 1;
1703 /* True if the 64-bit Linux PRPSINFO structure's `pr_uid' and `pr_gid'
1704 members use a 16-bit data type. */
1705 unsigned linux_prpsinfo64_ugid16
: 1;
1708 /* Information about reloc sections associated with a bfd_elf_section_data
1710 struct bfd_elf_section_reloc_data
1712 /* The ELF header for the reloc section associated with this
1714 Elf_Internal_Shdr
*hdr
;
1715 /* The number of relocations currently assigned to HDR. */
1717 /* The ELF section number of the reloc section. Only used for an
1720 /* Used by the backend linker to store the symbol hash table entries
1721 associated with relocs against global symbols. */
1722 struct elf_link_hash_entry
**hashes
;
1725 /* Information stored for each BFD section in an ELF file. This
1726 structure is allocated by elf_new_section_hook. */
1728 struct bfd_elf_section_data
1730 /* The ELF header for this section. */
1731 Elf_Internal_Shdr this_hdr
;
1733 /* INPUT_SECTION_FLAGS if specified in the linker script. */
1734 struct flag_info
*section_flag_info
;
1736 /* Information about the REL and RELA reloc sections associated
1737 with this section, if any. */
1738 struct bfd_elf_section_reloc_data rel
, rela
;
1740 /* The ELF section number of this section. */
1743 /* Used by the backend linker when generating a shared library to
1744 record the dynamic symbol index for a section symbol
1745 corresponding to this section. A value of 0 means that there is
1746 no dynamic symbol for this section. */
1749 /* A pointer to the linked-to section for SHF_LINK_ORDER. */
1750 asection
*linked_to
;
1752 /* A pointer to the swapped relocs. If the section uses REL relocs,
1753 rather than RELA, all the r_addend fields will be zero. This
1754 pointer may be NULL. It is used by the backend linker. */
1755 Elf_Internal_Rela
*relocs
;
1757 /* A pointer to a linked list tracking dynamic relocs copied for
1761 /* A pointer to the bfd section used for dynamic relocs. */
1765 /* Group name, if this section is a member of a group. */
1768 /* Group signature sym, if this is the SHT_GROUP section. */
1769 struct bfd_symbol
*id
;
1772 /* For a member of a group, points to the SHT_GROUP section.
1773 NULL for the SHT_GROUP section itself and non-group sections. */
1774 asection
*sec_group
;
1776 /* A linked list of member sections in the group. Circular when used by
1777 the linker. For the SHT_GROUP section, points at first member. */
1778 asection
*next_in_group
;
1780 /* The FDEs associated with this section. The u.fde.next_in_section
1781 field acts as a chain pointer. */
1782 struct eh_cie_fde
*fde_list
;
1784 /* Link from a text section to its .eh_frame_entry section. */
1785 asection
*eh_frame_entry
;
1787 /* TRUE if the section has secondary reloc sections associated with it.
1788 FIXME: In the future it might be better to change this into a list
1789 of secondary reloc sections, making lookup easier and faster. */
1790 bool has_secondary_relocs
;
1792 /* A pointer used for various section optimizations. */
1796 #define elf_section_data(sec) ((struct bfd_elf_section_data*)(sec)->used_by_bfd)
1797 #define elf_linked_to_section(sec) (elf_section_data(sec)->linked_to)
1798 #define elf_section_type(sec) (elf_section_data(sec)->this_hdr.sh_type)
1799 #define elf_section_flags(sec) (elf_section_data(sec)->this_hdr.sh_flags)
1800 #define elf_section_info(sec) (elf_section_data(sec)->this_hdr.sh_info)
1801 #define elf_group_name(sec) (elf_section_data(sec)->group.name)
1802 #define elf_group_id(sec) (elf_section_data(sec)->group.id)
1803 #define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group)
1804 #define elf_fde_list(sec) (elf_section_data(sec)->fde_list)
1805 #define elf_sec_group(sec) (elf_section_data(sec)->sec_group)
1806 #define elf_section_eh_frame_entry(sec) (elf_section_data(sec)->eh_frame_entry)
1808 #define xvec_get_elf_backend_data(xvec) \
1809 ((const struct elf_backend_data *) (xvec)->backend_data)
1811 #define get_elf_backend_data(abfd) \
1812 xvec_get_elf_backend_data ((abfd)->xvec)
1814 /* The least object attributes (within an attributes subsection) known
1815 for any target. Some code assumes that the value 0 is not used and
1816 the field for that attribute can instead be used as a marker to
1817 indicate that attributes have been initialized. */
1818 #define LEAST_KNOWN_OBJ_ATTRIBUTE 2
1820 /* The maximum number of known object attributes for any target. */
1821 #define NUM_KNOWN_OBJ_ATTRIBUTES 77
1823 /* The value of an object attribute. The type indicates whether the attribute
1824 holds and integer, a string, or both. It can also indicate that there can
1825 be no default (i.e. all values must be written to file, even zero), or
1826 that the value is in error and should not be written to file. */
1828 typedef struct obj_attribute
1830 #define ATTR_TYPE_FLAG_INT_VAL (1 << 0)
1831 #define ATTR_TYPE_FLAG_STR_VAL (1 << 1)
1832 #define ATTR_TYPE_FLAG_NO_DEFAULT (1 << 2)
1833 #define ATTR_TYPE_FLAG_ERROR (1 << 3)
1835 #define ATTR_TYPE_HAS_INT_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_INT_VAL)
1836 #define ATTR_TYPE_HAS_STR_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_STR_VAL)
1837 #define ATTR_TYPE_HAS_NO_DEFAULT(TYPE) ((TYPE) & ATTR_TYPE_FLAG_NO_DEFAULT)
1838 #define ATTR_TYPE_HAS_ERROR(TYPE) ((TYPE) & ATTR_TYPE_FLAG_ERROR)
1845 typedef struct obj_attribute_list
1847 struct obj_attribute_list
*next
;
1850 } obj_attribute_list
;
1852 /* Object attributes may either be defined by the processor ABI, index
1853 OBJ_ATTR_PROC in the *_obj_attributes arrays, or be GNU-specific
1854 (and possibly also processor-specific), index OBJ_ATTR_GNU. */
1855 #define OBJ_ATTR_PROC 0
1856 #define OBJ_ATTR_GNU 1
1857 #define OBJ_ATTR_FIRST OBJ_ATTR_PROC
1858 #define OBJ_ATTR_LAST OBJ_ATTR_GNU
1860 /* The following object attribute tags are taken as generic, for all
1861 targets and for "gnu" where there is no target standard. */
1868 Tag_compatibility
= 32
1871 /* The following struct stores information about every SystemTap section
1872 found in the object file. */
1875 struct sdt_note
*next
;
1880 /* tdata information grabbed from an elf core file. */
1881 struct core_elf_obj_tdata
1890 /* Extra tdata information held for output ELF BFDs. */
1891 struct output_elf_obj_tdata
1893 struct elf_segment_map
*seg_map
;
1894 struct elf_strtab_hash
*strtab_ptr
;
1896 /* STT_SECTION symbols for each section */
1897 asymbol
**section_syms
;
1899 /* Used to determine if PT_GNU_EH_FRAME segment header should be
1901 asection
*eh_frame_hdr
;
1903 /* NT_GNU_BUILD_ID note type info. */
1906 bool (*after_write_object_contents
) (bfd
*);
1911 /* Records the result of `get_program_header_size'. */
1912 bfd_size_type program_header_size
;
1914 /* Used when laying out sections. */
1915 file_ptr next_file_pos
;
1917 /* Linker information. */
1918 struct bfd_link_info
*link_info
;
1920 unsigned int num_section_syms
;
1921 unsigned int shstrtab_section
, strtab_section
;
1923 /* Segment flags for the PT_GNU_STACK segment. */
1924 unsigned int stack_flags
;
1926 /* Used to determine if the e_flags field has been initialized */
1930 /* Indicate if the bfd contains SHF_GNU_MBIND/SHF_GNU_RETAIN sections or
1931 symbols that have the STT_GNU_IFUNC symbol type or STB_GNU_UNIQUE
1932 binding. Used to set the osabi field in the ELF header structure. */
1935 elf_gnu_osabi_mbind
= 1 << 0,
1936 elf_gnu_osabi_ifunc
= 1 << 1,
1937 elf_gnu_osabi_unique
= 1 << 2,
1938 elf_gnu_osabi_retain
= 1 << 3,
1941 typedef struct elf_section_list
1943 Elf_Internal_Shdr hdr
;
1945 struct elf_section_list
* next
;
1948 enum dynamic_lib_link_class
{
1952 DYN_NO_ADD_NEEDED
= 4,
1956 /* Some private data is stashed away for future use using the tdata pointer
1957 in the bfd structure. */
1959 struct elf_obj_tdata
1961 Elf_Internal_Ehdr elf_header
[1]; /* Actual data, but ref like ptr */
1962 Elf_Internal_Shdr
**elf_sect_ptr
;
1963 Elf_Internal_Phdr
*phdr
;
1964 Elf_Internal_Shdr symtab_hdr
;
1965 Elf_Internal_Shdr shstrtab_hdr
;
1966 Elf_Internal_Shdr strtab_hdr
;
1967 Elf_Internal_Shdr dynsymtab_hdr
;
1968 Elf_Internal_Shdr dynstrtab_hdr
;
1969 Elf_Internal_Shdr dynversym_hdr
;
1970 Elf_Internal_Shdr dynverref_hdr
;
1971 Elf_Internal_Shdr dynverdef_hdr
;
1972 elf_section_list
* symtab_shndx_list
;
1973 bfd_vma gp
; /* The gp value */
1974 unsigned int gp_size
; /* The gp size */
1975 unsigned int num_elf_sections
; /* elf_sect_ptr size */
1976 unsigned char *being_created
;
1978 /* A mapping from external symbols to entries in the linker hash
1979 table, used when linking. This is indexed by the symbol index
1980 minus the sh_info field of the symbol table header. */
1981 struct elf_link_hash_entry
**sym_hashes
;
1983 /* Track usage and final offsets of GOT entries for local symbols.
1984 This array is indexed by symbol index. Elements are used
1985 identically to "got" in struct elf_link_hash_entry. */
1988 bfd_signed_vma
*refcounts
;
1990 struct got_entry
**ents
;
1993 /* The linker ELF emulation code needs to let the backend ELF linker
1994 know what filename should be used for a dynamic object if the
1995 dynamic object is found using a search. The emulation code then
1996 sometimes needs to know what name was actually used. Until the
1997 file has been added to the linker symbol table, this field holds
1998 the name the linker wants. After it has been added, it holds the
1999 name actually used, which will be the DT_SONAME entry if there is
2001 const char *dt_name
;
2003 /* The linker emulation needs to know what audit libs
2004 are used by a dynamic object. */
2005 const char *dt_audit
;
2007 /* Used by find_nearest_line entry point. */
2010 /* A place to stash dwarf1 info for this bfd. */
2011 struct dwarf1_debug
*dwarf1_find_line_info
;
2013 /* A place to stash dwarf2 info for this bfd. */
2014 void *dwarf2_find_line_info
;
2016 /* Stash away info for yet another find line/function variant. */
2017 void *elf_find_function_cache
;
2019 /* Number of symbol version definitions we are about to emit. */
2020 unsigned int cverdefs
;
2022 /* Number of symbol version references we are about to emit. */
2023 unsigned int cverrefs
;
2025 /* Symbol version definitions in external objects. */
2026 Elf_Internal_Verdef
*verdef
;
2028 /* Symbol version references to external objects. */
2029 Elf_Internal_Verneed
*verref
;
2031 /* A pointer to the .eh_frame section. */
2032 asection
*eh_frame_section
;
2034 /* Symbol buffer. */
2037 /* List of GNU properties. Will be updated by setup_gnu_properties
2038 after all input GNU properties are merged for output. */
2039 elf_property_list
*properties
;
2041 obj_attribute known_obj_attributes
[2][NUM_KNOWN_OBJ_ATTRIBUTES
];
2042 obj_attribute_list
*other_obj_attributes
[2];
2044 /* Linked-list containing information about every Systemtap section
2045 found in the object file. Each section corresponds to one entry
2047 struct sdt_note
*sdt_note_head
;
2049 Elf_Internal_Shdr
**group_sect_ptr
;
2050 unsigned int num_group
;
2052 /* Index into group_sect_ptr, updated by setup_group when finding a
2053 section's group. Used to optimize subsequent group searches. */
2054 unsigned int group_search_offset
;
2056 unsigned int symtab_section
, dynsymtab_section
;
2057 unsigned int dynversym_section
, dynverdef_section
, dynverref_section
;
2059 /* An identifier used to distinguish different target
2060 specific extensions to this structure. */
2061 ENUM_BITFIELD (elf_target_id
) object_id
: 6;
2063 /* Whether a dyanmic object was specified normally on the linker
2064 command line, or was specified when --as-needed was in effect,
2065 or was found via a DT_NEEDED entry. */
2066 ENUM_BITFIELD (dynamic_lib_link_class
) dyn_lib_class
: 4;
2068 /* Whether the bfd uses OS specific bits that require ELFOSABI_GNU. */
2069 ENUM_BITFIELD (elf_gnu_osabi
) has_gnu_osabi
: 4;
2071 /* Whether if the bfd contains the GNU_PROPERTY_NO_COPY_ON_PROTECTED
2073 unsigned int has_no_copy_on_protected
: 1;
2075 /* Whether if the bfd contains the
2076 GNU_PROPERTY_1_NEEDED_INDIRECT_EXTERN_ACCESS property. */
2077 unsigned int has_indirect_extern_access
: 1;
2079 /* Irix 5 often screws up the symbol table, sorting local symbols
2080 after global symbols. This flag is set if the symbol table in
2081 this BFD appears to be screwed up. If it is, we ignore the
2082 sh_info field in the symbol table header, and always read all the
2084 unsigned int bad_symtab
: 1;
2086 /* Set if DT_FLAGS_1 has DF_1_PIE set. */
2087 unsigned int is_pie
: 1;
2089 /* Information grabbed from an elf core file. */
2090 struct core_elf_obj_tdata
*core
;
2092 /* More information held for output ELF BFDs. */
2093 struct output_elf_obj_tdata
*o
;
2096 #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
2098 #define elf_object_id(bfd) (elf_tdata(bfd) -> object_id)
2099 #define elf_program_header_size(bfd) (elf_tdata(bfd) -> o->program_header_size)
2100 #define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header)
2101 #define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr)
2102 #define elf_numsections(bfd) (elf_tdata(bfd) -> num_elf_sections)
2103 #define elf_seg_map(bfd) (elf_tdata(bfd) -> o->seg_map)
2104 #define elf_link_info(bfd) (elf_tdata(bfd) -> o->link_info)
2105 #define elf_next_file_pos(bfd) (elf_tdata(bfd) -> o->next_file_pos)
2106 #define elf_eh_frame_hdr(bfd) (elf_tdata(bfd) -> o->eh_frame_hdr)
2107 #define elf_stack_flags(bfd) (elf_tdata(bfd) -> o->stack_flags)
2108 #define elf_shstrtab(bfd) (elf_tdata(bfd) -> o->strtab_ptr)
2109 #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section)
2110 #define elf_symtab_shndx_list(bfd) (elf_tdata(bfd) -> symtab_shndx_list)
2111 #define elf_strtab_sec(bfd) (elf_tdata(bfd) -> o->strtab_section)
2112 #define elf_shstrtab_sec(bfd) (elf_tdata(bfd) -> o->shstrtab_section)
2113 #define elf_symtab_hdr(bfd) (elf_tdata(bfd) -> symtab_hdr)
2114 #define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section)
2115 #define elf_dynversym(bfd) (elf_tdata(bfd) -> dynversym_section)
2116 #define elf_dynverdef(bfd) (elf_tdata(bfd) -> dynverdef_section)
2117 #define elf_dynverref(bfd) (elf_tdata(bfd) -> dynverref_section)
2118 #define elf_eh_frame_section(bfd) \
2119 (elf_tdata(bfd) -> eh_frame_section)
2120 #define elf_section_syms(bfd) (elf_tdata(bfd) -> o->section_syms)
2121 #define elf_num_section_syms(bfd) (elf_tdata(bfd) -> o->num_section_syms)
2122 #define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
2123 #define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
2124 #define elf_gp(bfd) (elf_tdata(bfd) -> gp)
2125 #define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size)
2126 #define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes)
2127 #define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts)
2128 #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets)
2129 #define elf_local_got_ents(bfd) (elf_tdata(bfd) -> local_got.ents)
2130 #define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name)
2131 #define elf_dt_audit(bfd) (elf_tdata(bfd) -> dt_audit)
2132 #define elf_dyn_lib_class(bfd) (elf_tdata(bfd) -> dyn_lib_class)
2133 #define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab)
2134 #define elf_flags_init(bfd) (elf_tdata(bfd) -> o->flags_init)
2135 #define elf_known_obj_attributes(bfd) (elf_tdata (bfd) -> known_obj_attributes)
2136 #define elf_other_obj_attributes(bfd) (elf_tdata (bfd) -> other_obj_attributes)
2137 #define elf_known_obj_attributes_proc(bfd) \
2138 (elf_known_obj_attributes (bfd) [OBJ_ATTR_PROC])
2139 #define elf_other_obj_attributes_proc(bfd) \
2140 (elf_other_obj_attributes (bfd) [OBJ_ATTR_PROC])
2141 #define elf_properties(bfd) (elf_tdata (bfd) -> properties)
2142 #define elf_has_no_copy_on_protected(bfd) \
2143 (elf_tdata(bfd) -> has_no_copy_on_protected)
2144 #define elf_has_indirect_extern_access(bfd) \
2145 (elf_tdata(bfd) -> has_indirect_extern_access)
2147 extern void _bfd_elf_swap_verdef_in
2148 (bfd
*, const Elf_External_Verdef
*, Elf_Internal_Verdef
*);
2149 extern void _bfd_elf_swap_verdef_out
2150 (bfd
*, const Elf_Internal_Verdef
*, Elf_External_Verdef
*);
2151 extern void _bfd_elf_swap_verdaux_in
2152 (bfd
*, const Elf_External_Verdaux
*, Elf_Internal_Verdaux
*);
2153 extern void _bfd_elf_swap_verdaux_out
2154 (bfd
*, const Elf_Internal_Verdaux
*, Elf_External_Verdaux
*);
2155 extern void _bfd_elf_swap_verneed_in
2156 (bfd
*, const Elf_External_Verneed
*, Elf_Internal_Verneed
*);
2157 extern void _bfd_elf_swap_verneed_out
2158 (bfd
*, const Elf_Internal_Verneed
*, Elf_External_Verneed
*);
2159 extern void _bfd_elf_swap_vernaux_in
2160 (bfd
*, const Elf_External_Vernaux
*, Elf_Internal_Vernaux
*);
2161 extern void _bfd_elf_swap_vernaux_out
2162 (bfd
*, const Elf_Internal_Vernaux
*, Elf_External_Vernaux
*);
2163 extern void _bfd_elf_swap_versym_in
2164 (bfd
*, const Elf_External_Versym
*, Elf_Internal_Versym
*);
2165 extern void _bfd_elf_swap_versym_out
2166 (bfd
*, const Elf_Internal_Versym
*, Elf_External_Versym
*);
2168 extern unsigned int _bfd_elf_section_from_bfd_section
2169 (bfd
*, asection
*);
2170 extern char *bfd_elf_string_from_elf_section
2171 (bfd
*, unsigned, unsigned);
2172 extern Elf_Internal_Sym
*bfd_elf_get_elf_syms
2173 (bfd
*, Elf_Internal_Shdr
*, size_t, size_t, Elf_Internal_Sym
*, void *,
2174 Elf_External_Sym_Shndx
*);
2175 extern char * bfd_elf_get_str_section (bfd
*, unsigned int);
2176 extern const char *bfd_elf_sym_name
2177 (bfd
*, Elf_Internal_Shdr
*, Elf_Internal_Sym
*, asection
*);
2179 extern bool _bfd_elf_copy_private_bfd_data
2181 extern bool _bfd_elf_print_private_bfd_data
2183 const char * _bfd_elf_get_symbol_version_string
2184 (bfd
*, asymbol
*, bool, bool *);
2185 extern void bfd_elf_print_symbol
2186 (bfd
*, void *, asymbol
*, bfd_print_symbol_type
);
2188 extern unsigned int _bfd_elf_eh_frame_address_size
2189 (bfd
*, const asection
*);
2190 extern bfd_byte _bfd_elf_encode_eh_address
2191 (bfd
*abfd
, struct bfd_link_info
*info
, asection
*osec
, bfd_vma offset
,
2192 asection
*loc_sec
, bfd_vma loc_offset
, bfd_vma
*encoded
);
2193 extern bool _bfd_elf_can_make_relative
2194 (bfd
*input_bfd
, struct bfd_link_info
*info
, asection
*eh_frame_section
);
2196 extern enum elf_reloc_type_class _bfd_elf_reloc_type_class
2197 (const struct bfd_link_info
*, const asection
*,
2198 const Elf_Internal_Rela
*);
2199 extern bfd_vma _bfd_elf_rela_local_sym
2200 (bfd
*, Elf_Internal_Sym
*, asection
**, Elf_Internal_Rela
*);
2201 extern bfd_vma _bfd_elf_rel_local_sym
2202 (bfd
*, Elf_Internal_Sym
*, asection
**, bfd_vma
);
2203 extern bfd_vma _bfd_elf_section_offset
2204 (bfd
*, struct bfd_link_info
*, asection
*, bfd_vma
);
2206 extern unsigned long bfd_elf_hash
2208 extern unsigned long bfd_elf_gnu_hash
2211 extern bfd_reloc_status_type bfd_elf_generic_reloc
2212 (bfd
*, arelent
*, asymbol
*, void *, asection
*, bfd
*, char **);
2213 extern bool bfd_elf_allocate_object
2214 (bfd
*, size_t, enum elf_target_id
);
2215 extern bool bfd_elf_make_object
2217 extern bool bfd_elf_mkcorefile
2219 extern bool _bfd_elf_make_section_from_shdr
2220 (bfd
*, Elf_Internal_Shdr
*, const char *, int);
2221 extern bool _bfd_elf_make_section_from_phdr
2222 (bfd
*, Elf_Internal_Phdr
*, int, const char *);
2223 extern struct bfd_hash_entry
*_bfd_elf_link_hash_newfunc
2224 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *);
2225 extern struct bfd_link_hash_table
*_bfd_elf_link_hash_table_create
2227 extern void _bfd_elf_link_hash_table_free
2229 extern void _bfd_elf_link_hash_copy_indirect
2230 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
2231 struct elf_link_hash_entry
*);
2232 extern void _bfd_elf_link_hash_hide_symbol
2233 (struct bfd_link_info
*, struct elf_link_hash_entry
*, bool);
2234 extern void _bfd_elf_link_hide_symbol
2235 (bfd
*, struct bfd_link_info
*, struct bfd_link_hash_entry
*);
2236 extern bool _bfd_elf_link_hash_fixup_symbol
2237 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
2238 extern bool _bfd_elf_link_hash_table_init
2239 (struct elf_link_hash_table
*, bfd
*,
2240 struct bfd_hash_entry
*(*)
2241 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *),
2242 unsigned int, enum elf_target_id
);
2243 extern bool _bfd_elf_slurp_version_tables
2245 extern bool _bfd_elf_merge_sections
2246 (bfd
*, struct bfd_link_info
*);
2247 extern bool _bfd_elf_match_sections_by_type
2248 (bfd
*, const asection
*, bfd
*, const asection
*);
2249 extern bool bfd_elf_is_group_section
2250 (bfd
*, const struct bfd_section
*);
2251 extern const char *bfd_elf_group_name
2252 (bfd
*, const struct bfd_section
*);
2253 extern bool _bfd_elf_section_already_linked
2254 (bfd
*, asection
*, struct bfd_link_info
*);
2255 extern void bfd_elf_set_group_contents
2256 (bfd
*, asection
*, void *);
2257 extern unsigned int _bfd_elf_filter_global_symbols
2258 (bfd
*, struct bfd_link_info
*, asymbol
**, long);
2259 extern asection
*_bfd_elf_check_kept_section
2260 (asection
*, struct bfd_link_info
*);
2261 #define _bfd_elf_link_just_syms _bfd_generic_link_just_syms
2262 extern void _bfd_elf_copy_link_hash_symbol_type
2263 (bfd
*, struct bfd_link_hash_entry
*, struct bfd_link_hash_entry
*);
2264 extern bool _bfd_elf_size_group_sections
2265 (struct bfd_link_info
*);
2266 extern bool _bfd_elf_fixup_group_sections
2267 (bfd
*, asection
*);
2268 extern bool _bfd_elf_copy_private_header_data
2270 extern bool _bfd_elf_copy_private_symbol_data
2271 (bfd
*, asymbol
*, bfd
*, asymbol
*);
2272 #define _bfd_generic_init_private_section_data \
2273 _bfd_elf_init_private_section_data
2274 extern bool _bfd_elf_init_private_section_data
2275 (bfd
*, asection
*, bfd
*, asection
*, struct bfd_link_info
*);
2276 extern bool _bfd_elf_copy_private_section_data
2277 (bfd
*, asection
*, bfd
*, asection
*);
2278 extern bool _bfd_elf_write_object_contents
2280 extern bool _bfd_elf_write_corefile_contents
2282 extern bool _bfd_elf_set_section_contents
2283 (bfd
*, sec_ptr
, const void *, file_ptr
, bfd_size_type
);
2284 extern long _bfd_elf_get_symtab_upper_bound
2286 extern long _bfd_elf_canonicalize_symtab
2287 (bfd
*, asymbol
**);
2288 extern long _bfd_elf_get_dynamic_symtab_upper_bound
2290 extern long _bfd_elf_canonicalize_dynamic_symtab
2291 (bfd
*, asymbol
**);
2292 extern long _bfd_elf_get_synthetic_symtab
2293 (bfd
*, long, asymbol
**, long, asymbol
**, asymbol
**);
2294 extern long _bfd_elf_get_reloc_upper_bound
2296 extern long _bfd_elf_canonicalize_reloc
2297 (bfd
*, sec_ptr
, arelent
**, asymbol
**);
2298 extern asection
* _bfd_elf_get_dynamic_reloc_section
2299 (bfd
*, asection
*, bool);
2300 extern asection
* _bfd_elf_make_dynamic_reloc_section
2301 (asection
*, bfd
*, unsigned int, bfd
*, bool);
2302 extern long _bfd_elf_get_dynamic_reloc_upper_bound
2304 extern long _bfd_elf_canonicalize_dynamic_reloc
2305 (bfd
*, arelent
**, asymbol
**);
2306 extern asymbol
*_bfd_elf_make_empty_symbol
2308 extern void _bfd_elf_get_symbol_info
2309 (bfd
*, asymbol
*, symbol_info
*);
2310 extern bool _bfd_elf_is_local_label_name
2311 (bfd
*, const char *);
2312 extern alent
*_bfd_elf_get_lineno
2314 extern bool _bfd_elf_set_arch_mach
2315 (bfd
*, enum bfd_architecture
, unsigned long);
2316 extern bool _bfd_elf_find_nearest_line
2317 (bfd
*, asymbol
**, asection
*, bfd_vma
,
2318 const char **, const char **, unsigned int *, unsigned int *);
2319 extern bool _bfd_elf_find_line
2320 (bfd
*, asymbol
**, asymbol
*, const char **, unsigned int *);
2321 extern bool _bfd_elf_find_inliner_info
2322 (bfd
*, const char **, const char **, unsigned int *);
2323 extern asymbol
*_bfd_elf_find_function
2324 (bfd
*, asymbol
**, asection
*, bfd_vma
, const char **, const char **);
2325 #define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols
2326 #define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
2327 extern int _bfd_elf_sizeof_headers
2328 (bfd
*, struct bfd_link_info
*);
2329 extern bool _bfd_elf_new_section_hook
2330 (bfd
*, asection
*);
2331 extern const struct bfd_elf_special_section
*_bfd_elf_get_special_section
2332 (const char *, const struct bfd_elf_special_section
*, unsigned int);
2333 extern const struct bfd_elf_special_section
*_bfd_elf_get_sec_type_attr
2334 (bfd
*, asection
*);
2336 extern bool _bfd_elf_link_hide_sym_by_version
2337 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
2339 /* If the target doesn't have reloc handling written yet: */
2340 extern bool _bfd_elf_no_info_to_howto
2341 (bfd
*, arelent
*, Elf_Internal_Rela
*);
2343 extern bool bfd_section_from_shdr
2344 (bfd
*, unsigned int shindex
);
2345 extern bool bfd_section_from_phdr
2346 (bfd
*, Elf_Internal_Phdr
*, int);
2348 extern int _bfd_elf_symbol_from_bfd_symbol
2349 (bfd
*, asymbol
**);
2351 extern Elf_Internal_Sym
*bfd_sym_from_r_symndx
2352 (struct sym_cache
*, bfd
*, unsigned long);
2353 extern asection
*bfd_section_from_elf_index
2354 (bfd
*, unsigned int);
2356 extern struct elf_strtab_hash
* _bfd_elf_strtab_init
2358 extern void _bfd_elf_strtab_free
2359 (struct elf_strtab_hash
*);
2360 extern size_t _bfd_elf_strtab_add
2361 (struct elf_strtab_hash
*, const char *, bool);
2362 extern void _bfd_elf_strtab_addref
2363 (struct elf_strtab_hash
*, size_t);
2364 extern void _bfd_elf_strtab_delref
2365 (struct elf_strtab_hash
*, size_t);
2366 extern unsigned int _bfd_elf_strtab_refcount
2367 (struct elf_strtab_hash
*, size_t);
2368 extern void _bfd_elf_strtab_clear_all_refs
2369 (struct elf_strtab_hash
*);
2370 extern void *_bfd_elf_strtab_save
2371 (struct elf_strtab_hash
*);
2372 extern void _bfd_elf_strtab_restore
2373 (struct elf_strtab_hash
*, void *);
2374 extern bfd_size_type _bfd_elf_strtab_size
2375 (struct elf_strtab_hash
*);
2376 extern bfd_size_type _bfd_elf_strtab_len
2377 (struct elf_strtab_hash
*);
2378 extern bfd_size_type _bfd_elf_strtab_offset
2379 (struct elf_strtab_hash
*, size_t);
2380 extern const char * _bfd_elf_strtab_str
2381 (struct elf_strtab_hash
*, size_t idx
, bfd_size_type
*offset
);
2382 extern bool _bfd_elf_strtab_emit
2383 (bfd
*, struct elf_strtab_hash
*);
2384 extern void _bfd_elf_strtab_finalize
2385 (struct elf_strtab_hash
*);
2387 extern bool bfd_elf_parse_eh_frame_entries
2388 (bfd
*, struct bfd_link_info
*);
2389 extern bool _bfd_elf_parse_eh_frame_entry
2390 (struct bfd_link_info
*, asection
*, struct elf_reloc_cookie
*);
2391 extern void _bfd_elf_parse_eh_frame
2392 (bfd
*, struct bfd_link_info
*, asection
*, struct elf_reloc_cookie
*);
2393 extern bool _bfd_elf_end_eh_frame_parsing
2394 (struct bfd_link_info
*info
);
2396 extern bool _bfd_elf_discard_section_eh_frame
2397 (bfd
*, struct bfd_link_info
*, asection
*,
2398 bool (*) (bfd_vma
, void *), struct elf_reloc_cookie
*);
2399 extern bool _bfd_elf_adjust_eh_frame_global_symbol
2400 (struct elf_link_hash_entry
*, void *);
2401 extern bool _bfd_elf_discard_section_eh_frame_hdr
2402 (bfd
*, struct bfd_link_info
*);
2403 extern bfd_vma _bfd_elf_eh_frame_section_offset
2404 (bfd
*, struct bfd_link_info
*, asection
*, bfd_vma
);
2405 extern bool _bfd_elf_write_section_eh_frame
2406 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
2407 bool _bfd_elf_write_section_eh_frame_entry
2408 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
2409 extern bool _bfd_elf_fixup_eh_frame_hdr (struct bfd_link_info
*);
2410 extern bool _bfd_elf_write_section_eh_frame_hdr
2411 (bfd
*, struct bfd_link_info
*);
2412 extern bool _bfd_elf_eh_frame_present
2413 (struct bfd_link_info
*);
2414 extern bool _bfd_elf_eh_frame_entry_present
2415 (struct bfd_link_info
*);
2416 extern bool _bfd_elf_maybe_strip_eh_frame_hdr
2417 (struct bfd_link_info
*);
2419 extern bool _bfd_elf_hash_symbol (struct elf_link_hash_entry
*);
2421 extern long _bfd_elf_link_lookup_local_dynindx
2422 (struct bfd_link_info
*, bfd
*, long);
2423 extern bool _bfd_elf_compute_section_file_positions
2424 (bfd
*, struct bfd_link_info
*);
2425 extern file_ptr _bfd_elf_assign_file_position_for_section
2426 (Elf_Internal_Shdr
*, file_ptr
, bool);
2427 extern bool _bfd_elf_modify_headers
2428 (bfd
*, struct bfd_link_info
*);
2430 extern bool _bfd_elf_validate_reloc
2433 extern bool bfd_elf_record_link_assignment
2434 (bfd
*, struct bfd_link_info
*, const char *, bool,
2436 extern bool bfd_elf_stack_segment_size (bfd
*, struct bfd_link_info
*,
2437 const char *, bfd_vma
);
2438 extern bool bfd_elf_size_dynamic_sections
2439 (bfd
*, const char *, const char *, const char *, const char *, const char *,
2440 const char * const *, struct bfd_link_info
*, struct bfd_section
**);
2441 extern bool bfd_elf_size_dynsym_hash_dynstr
2442 (bfd
*, struct bfd_link_info
*);
2443 extern bool bfd_elf_get_bfd_needed_list
2444 (bfd
*, struct bfd_link_needed_list
**);
2445 extern struct bfd_link_needed_list
*bfd_elf_get_needed_list
2446 (bfd
*, struct bfd_link_info
*);
2447 extern void bfd_elf_set_dt_needed_name
2448 (bfd
*, const char *);
2449 extern const char *bfd_elf_get_dt_soname
2451 extern void bfd_elf_set_dyn_lib_class
2452 (bfd
*, enum dynamic_lib_link_class
);
2453 extern int bfd_elf_get_dyn_lib_class
2455 extern struct bfd_link_needed_list
*bfd_elf_get_runpath_list
2456 (bfd
*, struct bfd_link_info
*);
2457 extern int bfd_elf_discard_info
2458 (bfd
*, struct bfd_link_info
*);
2459 extern unsigned int _bfd_elf_default_action_discarded
2460 (struct bfd_section
*);
2461 extern struct bfd_section
*_bfd_elf_tls_setup
2462 (bfd
*, struct bfd_link_info
*);
2464 extern bool _bfd_elf_link_create_dynamic_sections
2465 (bfd
*, struct bfd_link_info
*);
2466 extern bool _bfd_elf_omit_section_dynsym_default
2467 (bfd
*, struct bfd_link_info
*, asection
*);
2468 extern bool _bfd_elf_omit_section_dynsym_all
2469 (bfd
*, struct bfd_link_info
*, asection
*);
2470 extern bool _bfd_elf_create_dynamic_sections
2471 (bfd
*, struct bfd_link_info
*);
2472 extern bool _bfd_elf_create_got_section
2473 (bfd
*, struct bfd_link_info
*);
2474 extern asection
*_bfd_elf_section_for_symbol
2475 (struct elf_reloc_cookie
*, unsigned long, bool);
2476 extern struct elf_link_hash_entry
*_bfd_elf_define_linkage_sym
2477 (bfd
*, struct bfd_link_info
*, asection
*, const char *);
2478 extern void _bfd_elf_init_1_index_section
2479 (bfd
*, struct bfd_link_info
*);
2480 extern void _bfd_elf_init_2_index_sections
2481 (bfd
*, struct bfd_link_info
*);
2483 extern bool _bfd_elfcore_make_pseudosection
2484 (bfd
*, char *, size_t, ufile_ptr
);
2485 extern char *_bfd_elfcore_strndup
2486 (bfd
*, char *, size_t);
2488 extern Elf_Internal_Rela
*_bfd_elf_link_read_relocs
2489 (bfd
*, asection
*, void *, Elf_Internal_Rela
*, bool);
2490 extern Elf_Internal_Rela
*_bfd_elf_link_info_read_relocs
2491 (bfd
*, struct bfd_link_info
*, asection
*, void *, Elf_Internal_Rela
*,
2494 extern bool _bfd_elf_link_output_relocs
2495 (bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*,
2496 struct elf_link_hash_entry
**);
2498 extern bool _bfd_elf_adjust_dynamic_copy
2499 (struct bfd_link_info
*, struct elf_link_hash_entry
*, asection
*);
2501 extern bool _bfd_elf_dynamic_symbol_p
2502 (struct elf_link_hash_entry
*, struct bfd_link_info
*, bool);
2504 extern bool _bfd_elf_symbol_refs_local_p
2505 (struct elf_link_hash_entry
*, struct bfd_link_info
*, bool);
2507 extern bfd_reloc_status_type bfd_elf_perform_complex_relocation
2508 (bfd
*, asection
*, bfd_byte
*, Elf_Internal_Rela
*, bfd_vma
);
2510 extern bool _bfd_elf_setup_sections
2513 extern struct bfd_link_hash_entry
*bfd_elf_define_start_stop
2514 (struct bfd_link_info
*, const char *, asection
*);
2516 extern bool _bfd_elf_init_file_header (bfd
*, struct bfd_link_info
*);
2518 extern bool _bfd_elf_final_write_processing (bfd
*);
2520 extern bfd_cleanup bfd_elf32_object_p
2522 extern bfd_cleanup bfd_elf32_core_file_p
2524 extern char *bfd_elf32_core_file_failing_command
2526 extern int bfd_elf32_core_file_failing_signal
2528 extern bool bfd_elf32_core_file_matches_executable_p
2530 extern int bfd_elf32_core_file_pid
2532 extern bool _bfd_elf32_core_find_build_id
2535 extern bool bfd_elf32_swap_symbol_in
2536 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
2537 extern void bfd_elf32_swap_symbol_out
2538 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
2539 extern void bfd_elf32_swap_reloc_in
2540 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2541 extern void bfd_elf32_swap_reloc_out
2542 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2543 extern void bfd_elf32_swap_reloca_in
2544 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2545 extern void bfd_elf32_swap_reloca_out
2546 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2547 extern void bfd_elf32_swap_phdr_in
2548 (bfd
*, const Elf32_External_Phdr
*, Elf_Internal_Phdr
*);
2549 extern void bfd_elf32_swap_phdr_out
2550 (bfd
*, const Elf_Internal_Phdr
*, Elf32_External_Phdr
*);
2551 extern void bfd_elf32_swap_dyn_in
2552 (bfd
*, const void *, Elf_Internal_Dyn
*);
2553 extern void bfd_elf32_swap_dyn_out
2554 (bfd
*, const Elf_Internal_Dyn
*, void *);
2555 extern long bfd_elf32_slurp_symbol_table
2556 (bfd
*, asymbol
**, bool);
2557 extern bool bfd_elf32_write_shdrs_and_ehdr
2559 extern int bfd_elf32_write_out_phdrs
2560 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
2561 extern bool bfd_elf32_checksum_contents
2562 (bfd
* , void (*) (const void *, size_t, void *), void *);
2563 extern void bfd_elf32_write_relocs
2564 (bfd
*, asection
*, void *);
2565 extern bool bfd_elf32_slurp_reloc_table
2566 (bfd
*, asection
*, asymbol
**, bool);
2568 extern bfd_cleanup bfd_elf64_object_p
2570 extern bfd_cleanup bfd_elf64_core_file_p
2572 extern char *bfd_elf64_core_file_failing_command
2574 extern int bfd_elf64_core_file_failing_signal
2576 extern bool bfd_elf64_core_file_matches_executable_p
2578 extern int bfd_elf64_core_file_pid
2580 extern bool _bfd_elf64_core_find_build_id
2583 extern bool bfd_elf64_swap_symbol_in
2584 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
2585 extern void bfd_elf64_swap_symbol_out
2586 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
2587 extern void bfd_elf64_swap_reloc_in
2588 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2589 extern void bfd_elf64_swap_reloc_out
2590 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2591 extern void bfd_elf64_swap_reloca_in
2592 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2593 extern void bfd_elf64_swap_reloca_out
2594 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2595 extern void bfd_elf64_swap_phdr_in
2596 (bfd
*, const Elf64_External_Phdr
*, Elf_Internal_Phdr
*);
2597 extern void bfd_elf64_swap_phdr_out
2598 (bfd
*, const Elf_Internal_Phdr
*, Elf64_External_Phdr
*);
2599 extern void bfd_elf64_swap_dyn_in
2600 (bfd
*, const void *, Elf_Internal_Dyn
*);
2601 extern void bfd_elf64_swap_dyn_out
2602 (bfd
*, const Elf_Internal_Dyn
*, void *);
2603 extern long bfd_elf64_slurp_symbol_table
2604 (bfd
*, asymbol
**, bool);
2605 extern bool bfd_elf64_write_shdrs_and_ehdr
2607 extern int bfd_elf64_write_out_phdrs
2608 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
2609 extern bool bfd_elf64_checksum_contents
2610 (bfd
* , void (*) (const void *, size_t, void *), void *);
2611 extern void bfd_elf64_write_relocs
2612 (bfd
*, asection
*, void *);
2613 extern bool bfd_elf64_slurp_reloc_table
2614 (bfd
*, asection
*, asymbol
**, bool);
2616 extern bool _bfd_elf_default_relocs_compatible
2617 (const bfd_target
*, const bfd_target
*);
2619 extern bool _bfd_elf_relocs_compatible
2620 (const bfd_target
*, const bfd_target
*);
2621 extern bool _bfd_elf_notice_as_needed
2622 (bfd
*, struct bfd_link_info
*, enum notice_asneeded_action
);
2624 extern struct bfd_link_hash_entry
*_bfd_elf_archive_symbol_lookup
2625 (bfd
*, struct bfd_link_info
*, const char *);
2626 extern bool bfd_elf_link_add_symbols
2627 (bfd
*, struct bfd_link_info
*);
2628 extern bool _bfd_elf_add_dynamic_entry
2629 (struct bfd_link_info
*, bfd_vma
, bfd_vma
);
2630 extern bool _bfd_elf_strip_zero_sized_dynamic_sections
2631 (struct bfd_link_info
*);
2632 extern int bfd_elf_add_dt_needed_tag
2633 (bfd
*, struct bfd_link_info
*);
2634 extern bool _bfd_elf_link_check_relocs
2635 (bfd
*, struct bfd_link_info
*);
2636 extern bool _bfd_elf_link_iterate_on_relocs
2637 (bfd
*, struct bfd_link_info
*,
2638 bool (*) (bfd
*, struct bfd_link_info
*, asection
*,
2639 const Elf_Internal_Rela
*));
2641 extern bool bfd_elf_link_record_dynamic_symbol
2642 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
2644 extern int bfd_elf_link_record_local_dynamic_symbol
2645 (struct bfd_link_info
*, bfd
*, long);
2647 extern bool _bfd_elf_close_and_cleanup
2650 extern bool _bfd_elf_common_definition
2651 (Elf_Internal_Sym
*);
2653 extern unsigned int _bfd_elf_common_section_index
2656 extern asection
*_bfd_elf_common_section
2659 extern bfd_vma _bfd_elf_default_got_elt_size
2660 (bfd
*, struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd
*,
2663 extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn
2664 (bfd
*, arelent
*, struct bfd_symbol
*, void *,
2665 asection
*, bfd
*, char **);
2667 extern bool bfd_elf_final_link
2668 (bfd
*, struct bfd_link_info
*);
2670 extern void _bfd_elf_gc_keep
2671 (struct bfd_link_info
*info
);
2673 extern bool bfd_elf_gc_mark_dynamic_ref_symbol
2674 (struct elf_link_hash_entry
*h
, void *inf
);
2676 extern bool bfd_elf_gc_sections
2677 (bfd
*, struct bfd_link_info
*);
2679 extern bool bfd_elf_gc_record_vtinherit
2680 (bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
);
2682 extern bool bfd_elf_gc_record_vtentry
2683 (bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
);
2685 extern asection
*_bfd_elf_gc_mark_hook
2686 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
2687 struct elf_link_hash_entry
*, Elf_Internal_Sym
*);
2689 extern asection
*_bfd_elf_gc_mark_rsec
2690 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
,
2691 struct elf_reloc_cookie
*, bool *);
2693 extern bool _bfd_elf_gc_mark_reloc
2694 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
,
2695 struct elf_reloc_cookie
*);
2697 extern bool _bfd_elf_gc_mark_fdes
2698 (struct bfd_link_info
*, asection
*, asection
*, elf_gc_mark_hook_fn
,
2699 struct elf_reloc_cookie
*);
2701 extern bool _bfd_elf_gc_mark
2702 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
);
2704 extern bool _bfd_elf_gc_mark_extra_sections
2705 (struct bfd_link_info
*, elf_gc_mark_hook_fn
);
2707 extern bool bfd_elf_gc_common_finalize_got_offsets
2708 (bfd
*, struct bfd_link_info
*);
2710 extern bool bfd_elf_gc_common_final_link
2711 (bfd
*, struct bfd_link_info
*);
2713 extern bool bfd_elf_reloc_symbol_deleted_p
2716 extern struct elf_segment_map
* _bfd_elf_make_dynamic_segment
2717 (bfd
*, asection
*);
2719 extern bool _bfd_elf_map_sections_to_segments
2720 (bfd
*, struct bfd_link_info
*, bool *);
2722 extern bool _bfd_elf_is_function_type (unsigned int);
2724 extern bfd_size_type
_bfd_elf_maybe_function_sym (const asymbol
*, asection
*,
2727 extern asection
*_bfd_elf_plt_get_reloc_section (bfd
*, const char *);
2729 extern int bfd_elf_get_default_section_type (flagword
);
2731 extern bool bfd_elf_lookup_section_flags
2732 (struct bfd_link_info
*, struct flag_info
*, asection
*);
2734 extern Elf_Internal_Phdr
* _bfd_elf_find_segment_containing_section
2735 (bfd
* abfd
, asection
* section
);
2737 /* PowerPC @tls opcode transform/validate. */
2738 extern unsigned int _bfd_elf_ppc_at_tls_transform
2739 (unsigned int, unsigned int);
2740 /* PowerPC @tprel opcode transform/validate. */
2741 extern unsigned int _bfd_elf_ppc_at_tprel_transform
2742 (unsigned int, unsigned int);
2743 /* PowerPC elf_object_p tweak. */
2744 extern bool _bfd_elf_ppc_set_arch (bfd
*);
2745 /* PowerPC .gnu.attributes handling common to both 32-bit and 64-bit. */
2746 extern bool _bfd_elf_ppc_merge_fp_attributes
2747 (bfd
*, struct bfd_link_info
*);
2749 /* Return an upper bound on the number of bytes required to store a
2750 copy of ABFD's program header table entries. Return -1 if an error
2751 occurs; bfd_get_error will return an appropriate code. */
2752 extern long bfd_get_elf_phdr_upper_bound
2755 /* Copy ABFD's program header table entries to *PHDRS. The entries
2756 will be stored as an array of Elf_Internal_Phdr structures, as
2757 defined in include/elf/internal.h. To find out how large the
2758 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
2760 Return the number of program header table entries read, or -1 if an
2761 error occurs; bfd_get_error will return an appropriate code. */
2762 extern int bfd_get_elf_phdrs
2763 (bfd
*abfd
, void *phdrs
);
2765 /* Exported interface for writing elf corefile notes. */
2766 extern char *elfcore_write_note
2767 (bfd
*, char *, int *, const char *, int, const void *, int);
2768 extern char *elfcore_write_prpsinfo
2769 (bfd
*, char *, int *, const char *, const char *);
2770 extern char *elfcore_write_prstatus
2771 (bfd
*, char *, int *, long, int, const void *);
2772 extern char * elfcore_write_pstatus
2773 (bfd
*, char *, int *, long, int, const void *);
2774 extern char *elfcore_write_prfpreg
2775 (bfd
*, char *, int *, const void *, int);
2776 extern char *elfcore_write_prxfpreg
2777 (bfd
*, char *, int *, const void *, int);
2778 extern char *elfcore_write_xstatereg
2779 (bfd
*, char *, int *, const void *, int);
2780 extern char *elfcore_write_ppc_vmx
2781 (bfd
*, char *, int *, const void *, int);
2782 extern char *elfcore_write_ppc_vsx
2783 (bfd
*, char *, int *, const void *, int);
2784 extern char *elfcore_write_ppc_tar
2785 (bfd
*, char *, int *, const void *, int);
2786 extern char *elfcore_write_ppc_ppr
2787 (bfd
*, char *, int *, const void *, int);
2788 extern char *elfcore_write_ppc_dscr
2789 (bfd
*, char *, int *, const void *, int);
2790 extern char *elfcore_write_ppc_ebb
2791 (bfd
*, char *, int *, const void *, int);
2792 extern char *elfcore_write_ppc_pmu
2793 (bfd
*, char *, int *, const void *, int);
2794 extern char *elfcore_write_ppc_tm_cgpr
2795 (bfd
*, char *, int *, const void *, int);
2796 extern char *elfcore_write_ppc_tm_cfpr
2797 (bfd
*, char *, int *, const void *, int);
2798 extern char *elfcore_write_ppc_tm_cvmx
2799 (bfd
*, char *, int *, const void *, int);
2800 extern char *elfcore_write_ppc_tm_cvsx
2801 (bfd
*, char *, int *, const void *, int);
2802 extern char *elfcore_write_ppc_tm_spr
2803 (bfd
*, char *, int *, const void *, int);
2804 extern char *elfcore_write_ppc_tm_ctar
2805 (bfd
*, char *, int *, const void *, int);
2806 extern char *elfcore_write_ppc_tm_cppr
2807 (bfd
*, char *, int *, const void *, int);
2808 extern char *elfcore_write_ppc_tm_cdscr
2809 (bfd
*, char *, int *, const void *, int);
2810 extern char *elfcore_write_s390_timer
2811 (bfd
*, char *, int *, const void *, int);
2812 extern char *elfcore_write_s390_todcmp
2813 (bfd
*, char *, int *, const void *, int);
2814 extern char *elfcore_write_s390_todpreg
2815 (bfd
*, char *, int *, const void *, int);
2816 extern char *elfcore_write_s390_ctrs
2817 (bfd
*, char *, int *, const void *, int);
2818 extern char *elfcore_write_s390_prefix
2819 (bfd
*, char *, int *, const void *, int);
2820 extern char *elfcore_write_s390_last_break
2821 (bfd
*, char *, int *, const void *, int);
2822 extern char *elfcore_write_s390_system_call
2823 (bfd
*, char *, int *, const void *, int);
2824 extern char *elfcore_write_s390_tdb
2825 (bfd
*, char *, int *, const void *, int);
2826 extern char *elfcore_write_s390_vxrs_low
2827 (bfd
*, char *, int *, const void *, int);
2828 extern char *elfcore_write_s390_vxrs_high
2829 (bfd
*, char *, int *, const void *, int);
2830 extern char *elfcore_write_s390_gs_cb
2831 (bfd
*, char *, int *, const void *, int);
2832 extern char *elfcore_write_s390_gs_bc
2833 (bfd
*, char *, int *, const void *, int);
2834 extern char *elfcore_write_arm_vfp
2835 (bfd
*, char *, int *, const void *, int);
2836 extern char *elfcore_write_aarch_tls
2837 (bfd
*, char *, int *, const void *, int);
2838 extern char *elfcore_write_aarch_hw_break
2839 (bfd
*, char *, int *, const void *, int);
2840 extern char *elfcore_write_aarch_hw_watch
2841 (bfd
*, char *, int *, const void *, int);
2842 extern char *elfcore_write_aarch_sve
2843 (bfd
*, char *, int *, const void *, int);
2844 extern char *elfcore_write_aarch_pauth
2845 (bfd
*, char *, int *, const void *, int);
2846 extern char *elfcore_write_aarch_mte
2847 (bfd
*, char *, int *, const void *, int);
2848 extern char *elfcore_write_arc_v2
2849 (bfd
*, char *, int *, const void *, int);
2850 extern char *elfcore_write_riscv_csr
2851 (bfd
*, char *, int *, const void *, int);
2852 extern char *elfcore_write_gdb_tdesc
2853 (bfd
*, char *, int *, const void *, int);
2854 extern char *elfcore_write_lwpstatus
2855 (bfd
*, char *, int *, long, int, const void *);
2856 extern char *elfcore_write_register_note
2857 (bfd
*, char *, int *, const char *, const void *, int);
2858 extern char *elfcore_write_file_note
2859 (bfd
*, char *, int *, const void*, int);
2860 extern char *elfcore_write_loongarch_cpucfg
2861 (bfd
*, char *, int *, const void*, int);
2862 extern char *elfcore_write_loongarch_lbt
2863 (bfd
*, char *, int *, const void*, int);
2864 extern char *elfcore_write_loongarch_lsx
2865 (bfd
*, char *, int *, const void*, int);
2866 extern char *elfcore_write_loongarch_lasx
2867 (bfd
*, char *, int *, const void*, int);
2869 /* Internal structure which holds information to be included in the
2870 PRPSINFO section of Linux core files.
2872 This is an "internal" structure in the sense that it should be used
2873 to pass information to BFD (via the `elfcore_write_linux_prpsinfo'
2874 function), so things like endianess shouldn't be an issue. This
2875 structure will eventually be converted in one of the
2876 `elf_external_linux_*' structures and written out to an output bfd
2877 by one of the functions declared below. */
2879 struct elf_internal_linux_prpsinfo
2881 char pr_state
; /* Numeric process state. */
2882 char pr_sname
; /* Char for pr_state. */
2883 char pr_zomb
; /* Zombie. */
2884 char pr_nice
; /* Nice val. */
2885 unsigned long pr_flag
; /* Flags. */
2886 unsigned int pr_uid
;
2887 unsigned int pr_gid
;
2888 int pr_pid
, pr_ppid
, pr_pgrp
, pr_sid
;
2889 char pr_fname
[16 + 1]; /* Filename of executable. */
2890 char pr_psargs
[80 + 1]; /* Initial part of arg list. */
2893 /* Linux/most 32-bit archs. */
2894 extern char *elfcore_write_linux_prpsinfo32
2895 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
2897 /* Linux/most 64-bit archs. */
2898 extern char *elfcore_write_linux_prpsinfo64
2899 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
2901 extern bfd
*_bfd_elf32_bfd_from_remote_memory
2902 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
2903 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, bfd_size_type
));
2904 extern bfd
*_bfd_elf64_bfd_from_remote_memory
2905 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
2906 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, bfd_size_type
));
2908 extern bfd_vma
bfd_elf_obj_attr_size (bfd
*);
2909 extern void bfd_elf_set_obj_attr_contents (bfd
*, bfd_byte
*, bfd_vma
);
2910 extern int bfd_elf_get_obj_attr_int (bfd
*, int, unsigned int);
2911 extern void bfd_elf_add_obj_attr_int (bfd
*, int, unsigned int, unsigned int);
2912 #define bfd_elf_add_proc_attr_int(BFD, TAG, VALUE) \
2913 bfd_elf_add_obj_attr_int ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2914 extern void bfd_elf_add_obj_attr_string (bfd
*, int, unsigned int, const char *);
2915 #define bfd_elf_add_proc_attr_string(BFD, TAG, VALUE) \
2916 bfd_elf_add_obj_attr_string ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2917 extern void bfd_elf_add_obj_attr_int_string (bfd
*, int, unsigned int,
2918 unsigned int, const char *);
2919 #define bfd_elf_add_proc_attr_int_string(BFD, TAG, INTVAL, STRVAL) \
2920 bfd_elf_add_obj_attr_int_string ((BFD), OBJ_ATTR_PROC, (TAG), \
2923 extern char *_bfd_elf_attr_strdup (bfd
*, const char *);
2924 extern void _bfd_elf_copy_obj_attributes (bfd
*, bfd
*);
2925 extern int _bfd_elf_obj_attrs_arg_type (bfd
*, int, unsigned int);
2926 extern void _bfd_elf_parse_attributes (bfd
*, Elf_Internal_Shdr
*);
2927 extern bool _bfd_elf_merge_object_attributes
2928 (bfd
*, struct bfd_link_info
*);
2929 extern bool _bfd_elf_merge_unknown_attribute_low (bfd
*, bfd
*, int);
2930 extern bool _bfd_elf_merge_unknown_attribute_list (bfd
*, bfd
*);
2931 extern Elf_Internal_Shdr
*_bfd_elf_single_rel_hdr (asection
*sec
);
2932 extern bool elf_read_notes (bfd
*, file_ptr
, bfd_size_type
, size_t);
2934 extern bool _bfd_elf_parse_gnu_properties
2935 (bfd
*, Elf_Internal_Note
*);
2936 extern elf_property
* _bfd_elf_get_property
2937 (bfd
*, unsigned int, unsigned int);
2938 extern bfd
*_bfd_elf_link_setup_gnu_properties
2939 (struct bfd_link_info
*);
2940 extern bfd_size_type _bfd_elf_convert_gnu_property_size
2942 extern bool _bfd_elf_convert_gnu_properties
2943 (bfd
*, asection
*, bfd
*, bfd_byte
**, bfd_size_type
*);
2945 /* The linker may need to keep track of the number of relocs that it
2946 decides to copy as dynamic relocs in check_relocs for each symbol.
2947 This is so that it can later discard them if they are found to be
2948 unnecessary. We can store the information in a field extending the
2949 regular ELF linker hash table. */
2951 struct elf_dyn_relocs
2953 struct elf_dyn_relocs
*next
;
2955 /* The input section of the reloc. */
2958 /* Total number of relocs copied for the input section. */
2959 bfd_size_type count
;
2961 /* Number of pc-relative relocs copied for the input section. */
2962 bfd_size_type pc_count
;
2965 extern bool _bfd_elf_create_ifunc_sections
2966 (bfd
*, struct bfd_link_info
*);
2967 extern bool _bfd_elf_allocate_ifunc_dyn_relocs
2968 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
2969 struct elf_dyn_relocs
**, unsigned int, unsigned int,
2970 unsigned int, bool);
2972 extern void elf_append_rela (bfd
*, asection
*, Elf_Internal_Rela
*);
2973 extern void elf_append_rel (bfd
*, asection
*, Elf_Internal_Rela
*);
2975 extern bfd_vma
elf64_r_info (bfd_vma
, bfd_vma
);
2976 extern bfd_vma
elf64_r_sym (bfd_vma
);
2977 extern bfd_vma
elf32_r_info (bfd_vma
, bfd_vma
);
2978 extern bfd_vma
elf32_r_sym (bfd_vma
);
2980 extern bool is_debuginfo_file (bfd
*);
2983 extern bool _bfd_elf_init_secondary_reloc_section
2984 (bfd
*, Elf_Internal_Shdr
*, const char *, unsigned int);
2985 extern bool _bfd_elf_slurp_secondary_reloc_section
2986 (bfd
*, asection
*, asymbol
**, bool);
2987 extern bool _bfd_elf_copy_special_section_fields
2988 (const bfd
*, bfd
*, const Elf_Internal_Shdr
*, Elf_Internal_Shdr
*);
2989 extern bool _bfd_elf_write_secondary_reloc_section
2990 (bfd
*, asection
*);
2991 extern unsigned int _bfd_elf_symbol_section_index
2992 (bfd
*, elf_symbol_type
*);
2994 extern asection
*_bfd_elf_readonly_dynrelocs
2995 (struct elf_link_hash_entry
*);
2996 extern bool _bfd_elf_maybe_set_textrel
2997 (struct elf_link_hash_entry
*, void *);
2999 extern bool _bfd_elf_add_dynamic_tags
3000 (bfd
*, struct bfd_link_info
*, bool);
3002 /* Large common section. */
3003 extern asection _bfd_elf_large_com_section
;
3005 /* Hash for local symbol with the first section id, ID, in the input
3006 file and the local symbol index, SYM. */
3007 #define ELF_LOCAL_SYMBOL_HASH(ID, SYM) \
3008 (((((ID) & 0xffU) << 24) | (((ID) & 0xff00) << 8)) \
3009 ^ (SYM) ^ (((ID) & 0xffff0000U) >> 16))
3011 /* This is the condition under which finish_dynamic_symbol will be called.
3012 If our finish_dynamic_symbol isn't called, we'll need to do something
3013 about initializing any .plt and .got entries in relocate_section. */
3014 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
3016 && ((SHARED) || !(H)->forced_local) \
3017 && ((H)->dynindx != -1 || (H)->forced_local))
3019 /* This macro is to avoid lots of duplicated code in the body
3020 of xxx_relocate_section() in the various elfxx-xxxx.c files. */
3021 #define RELOC_FOR_GLOBAL_SYMBOL(info, input_bfd, input_section, rel, \
3022 r_symndx, symtab_hdr, sym_hashes, \
3023 h, sec, relocation, \
3024 unresolved_reloc, warned, ignored) \
3027 /* It seems this can happen with erroneous or unsupported \
3028 input (mixing a.out and elf in an archive, for example.) */ \
3029 if (sym_hashes == NULL) \
3032 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; \
3034 if (info->wrap_hash != NULL \
3035 && (input_section->flags & SEC_DEBUGGING) != 0) \
3036 h = ((struct elf_link_hash_entry *) \
3037 unwrap_hash_lookup (info, input_bfd, &h->root)); \
3039 while (h->root.type == bfd_link_hash_indirect \
3040 || h->root.type == bfd_link_hash_warning) \
3041 h = (struct elf_link_hash_entry *) h->root.u.i.link; \
3045 unresolved_reloc = false; \
3047 if (h->root.type == bfd_link_hash_defined \
3048 || h->root.type == bfd_link_hash_defweak) \
3050 sec = h->root.u.def.section; \
3052 || sec->output_section == NULL) \
3053 /* Set a flag that will be cleared later if we find a \
3054 relocation value for this symbol. output_section \
3055 is typically NULL for symbols satisfied by a shared \
3057 unresolved_reloc = true; \
3059 relocation = (h->root.u.def.value \
3060 + sec->output_section->vma \
3061 + sec->output_offset); \
3063 else if (h->root.type == bfd_link_hash_undefweak) \
3065 else if (info->unresolved_syms_in_objects == RM_IGNORE \
3066 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) \
3068 else if (!bfd_link_relocatable (info)) \
3070 bool err = ((info->unresolved_syms_in_objects == RM_DIAGNOSE \
3071 && !info->warn_unresolved_syms) \
3072 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT); \
3073 (*info->callbacks->undefined_symbol) (info, \
3074 h->root.root.string, \
3077 rel->r_offset, err); \
3080 (void) unresolved_reloc; \
3086 /* This macro is to avoid lots of duplicated code in the body of the
3087 loop over relocations in xxx_relocate_section() in the various
3090 Handle relocations against symbols from removed linkonce sections,
3091 or sections discarded by a linker script. When doing a relocatable
3092 link, we remove such relocations. Otherwise, we just want the
3093 section contents zeroed and avoid any special processing. */
3094 #define RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
3095 rel, count, relend, \
3096 howto, index, contents) \
3099 _bfd_clear_contents (howto, input_bfd, input_section, \
3100 contents, rel[index].r_offset); \
3102 if (bfd_link_relocatable (info) \
3103 && (input_section->flags & SEC_DEBUGGING)) \
3105 /* Only remove relocations in debug sections since other \
3106 sections may require relocations. */ \
3107 Elf_Internal_Shdr *rel_hdr; \
3109 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
3111 /* Avoid empty output section. */ \
3112 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
3114 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
3115 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
3116 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
3118 memmove (rel, rel + count, \
3119 (relend - rel - count) * sizeof (*rel)); \
3121 input_section->reloc_count -= count; \
3128 for (i_ = 0; i_ < count; i_++) \
3130 rel[i_].r_info = 0; \
3131 rel[i_].r_addend = 0; \
3137 /* Will a symbol be bound to the definition within the shared
3138 library, if any. A unique symbol can never be bound locally. */
3139 #define SYMBOLIC_BIND(INFO, H) \
3140 (!(H)->unique_global \
3141 && ((INFO)->symbolic \
3142 || (H)->start_stop \
3143 || ((INFO)->dynamic && !(H)->dynamic)))
3145 /* Determine if a section contains CTF data, using its name. */
3147 bfd_section_is_ctf (const asection
*sec
)
3149 const char *name
= bfd_section_name (sec
);
3150 return startswith (name
, ".ctf") && (name
[4] == 0 || name
[4] == '.');
3156 #endif /* _LIBELF_H_ */