1 /* BFD back-end data structures for ELF files.
2 Copyright (C) 1992-2021 Free Software Foundation, Inc.
3 Written by Cygnus Support.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
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,
537 struct elf_sym_strtab
539 Elf_Internal_Sym sym
;
540 unsigned long dest_index
;
541 unsigned long destshndx_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 number of symbol strings found in the link which must be put
626 into the .strtab section. */
627 bfd_size_type strtabcount
;
629 /* The array size of the symbol string table, which becomes the
631 bfd_size_type strtabsize
;
633 /* The array of strings, which becomes the .strtab section. */
634 struct elf_sym_strtab
*strtab
;
636 /* The number of buckets in the hash table in the .hash section.
637 This is based on the number of dynamic symbols. */
638 bfd_size_type bucketcount
;
640 /* A linked list of DT_NEEDED names found in dynamic objects
641 included in the link. */
642 struct bfd_link_needed_list
*needed
;
644 /* Sections in the output bfd that provides a section symbol
645 to be used by relocations emitted against local symbols.
646 Most targets will not use data_index_section. */
647 asection
*text_index_section
;
648 asection
*data_index_section
;
650 /* The _GLOBAL_OFFSET_TABLE_ symbol. */
651 struct elf_link_hash_entry
*hgot
;
653 /* The _PROCEDURE_LINKAGE_TABLE_ symbol. */
654 struct elf_link_hash_entry
*hplt
;
656 /* The _DYNAMIC symbol. */
657 struct elf_link_hash_entry
*hdynamic
;
659 /* A pointer to information used to merge SEC_MERGE sections. */
662 /* Used to link stabs in sections. */
663 struct stab_info stab_info
;
665 /* Used by eh_frame code when editing .eh_frame. */
666 struct eh_frame_hdr_info eh_info
;
668 /* A linked list of local symbols to be added to .dynsym. */
669 struct elf_link_local_dynamic_entry
*dynlocal
;
671 /* A linked list of DT_RPATH/DT_RUNPATH names found in dynamic
672 objects included in the link. */
673 struct bfd_link_needed_list
*runpath
;
675 /* Cached first output tls section and size of PT_TLS segment. */
677 bfd_size_type tls_size
; /* Bytes. */
679 /* The offset into splt of the PLT entry for the TLS descriptor
680 resolver. Special values are 0, if not necessary (or not found
681 to be necessary yet), and -1 if needed but not determined
685 /* The GOT offset for the lazy trampoline. Communicated to the
686 loader via DT_TLSDESC_GOT. The magic value (bfd_vma) -1
687 indicates an offset is not allocated. */
690 /* Target OS for linker output. */
691 enum elf_target_os target_os
;
693 /* A linked list of dynamic BFD's loaded in the link. */
694 struct elf_link_loaded_list
*dyn_loaded
;
696 /* Small local sym cache. */
697 struct sym_cache sym_cache
;
699 /* Short-cuts to get to dynamic linker sections. */
708 asection
*sreldynrelro
;
716 /* Returns TRUE if the hash table is a struct elf_link_hash_table. */
719 is_elf_hash_table (const struct bfd_link_hash_table
*htab
)
721 return htab
->type
== bfd_link_elf_hash_table
;
724 /* Look up an entry in an ELF linker hash table. */
726 static inline struct elf_link_hash_entry
*
727 elf_link_hash_lookup (struct elf_link_hash_table
*table
, const char *string
,
728 bool create
, bool copy
, bool follow
)
730 if (ENABLE_CHECKING
&& !is_elf_hash_table (&table
->root
))
732 return (struct elf_link_hash_entry
*)
733 bfd_link_hash_lookup (&table
->root
, string
, create
, copy
, follow
);
736 /* Traverse an ELF linker hash table. */
739 elf_link_hash_traverse (struct elf_link_hash_table
*table
,
740 bool (*f
) (struct elf_link_hash_entry
*, void *),
743 if (ENABLE_CHECKING
&& !is_elf_hash_table (&table
->root
))
745 bfd_link_hash_traverse (&table
->root
,
746 (bool (*) (struct bfd_link_hash_entry
*, void *)) f
,
750 /* Get the ELF linker hash table from a link_info structure. */
752 static inline struct elf_link_hash_table
*
753 elf_hash_table (const struct bfd_link_info
*info
)
755 return (struct elf_link_hash_table
*) info
->hash
;
758 static inline enum elf_target_id
759 elf_hash_table_id (const struct elf_link_hash_table
*table
)
761 return table
->hash_table_id
;
764 /* Constant information held for an ELF backend. */
766 struct elf_size_info
{
767 unsigned char sizeof_ehdr
, sizeof_phdr
, sizeof_shdr
;
768 unsigned char sizeof_rel
, sizeof_rela
, sizeof_sym
, sizeof_dyn
, sizeof_note
;
770 /* The size of entries in the .hash section. */
771 unsigned char sizeof_hash_entry
;
773 /* The number of internal relocations to allocate per external
775 unsigned char int_rels_per_ext_rel
;
776 /* We use some fixed size arrays. This should be large enough to
777 handle all back-ends. */
778 #define MAX_INT_RELS_PER_EXT_REL 3
780 unsigned char arch_size
, log_file_align
;
781 unsigned char elfclass
, ev_current
;
782 int (*write_out_phdrs
)
783 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
784 bool (*write_shdrs_and_ehdr
) (bfd
*);
785 bool (*checksum_contents
)
786 (bfd
* , void (*) (const void *, size_t, void *), void *);
788 (bfd
*, asection
*, void *);
789 bool (*swap_symbol_in
)
790 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
791 void (*swap_symbol_out
)
792 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
793 bool (*slurp_reloc_table
)
794 (bfd
*, asection
*, asymbol
**, bool);
795 long (*slurp_symbol_table
)
796 (bfd
*, asymbol
**, bool);
798 (bfd
*, const void *, Elf_Internal_Dyn
*);
800 (bfd
*, const Elf_Internal_Dyn
*, void *);
802 /* This function is called to swap in a REL relocation. If an
803 external relocation corresponds to more than one internal
804 relocation, then all relocations are swapped in at once. */
805 void (*swap_reloc_in
)
806 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
808 /* This function is called to swap out a REL relocation. */
809 void (*swap_reloc_out
)
810 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
812 /* This function is called to swap in a RELA relocation. If an
813 external relocation corresponds to more than one internal
814 relocation, then all relocations are swapped in at once. */
815 void (*swap_reloca_in
)
816 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
818 /* This function is called to swap out a RELA relocation. */
819 void (*swap_reloca_out
)
820 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
823 #define elf_symbol_from(S) \
824 ((((S)->flags & BSF_SYNTHETIC) == 0 \
825 && (S)->the_bfd != NULL \
826 && (S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \
827 && (S)->the_bfd->tdata.elf_obj_data != 0) \
828 ? (elf_symbol_type *) (S) \
831 enum elf_reloc_type_class
{
833 reloc_class_relative
,
839 struct elf_reloc_cookie
841 Elf_Internal_Rela
*rels
, *rel
, *relend
;
842 Elf_Internal_Sym
*locsyms
;
846 struct elf_link_hash_entry
**sym_hashes
;
851 /* The level of IRIX compatibility we're striving for. */
859 /* Mapping of ELF section names and types. */
860 struct bfd_elf_special_section
863 unsigned int prefix_length
;
864 /* 0 means name must match PREFIX exactly.
865 -1 means name must start with PREFIX followed by an arbitrary string.
866 -2 means name must match PREFIX exactly or consist of PREFIX followed
867 by a dot then anything.
868 > 0 means name must start with the first PREFIX_LENGTH chars of
869 PREFIX and finish with the last SUFFIX_LENGTH chars of PREFIX. */
870 signed int suffix_length
;
875 enum action_discarded
881 typedef asection
* (*elf_gc_mark_hook_fn
)
882 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
883 struct elf_link_hash_entry
*, Elf_Internal_Sym
*);
885 enum elf_property_kind
887 /* A new property. */
888 property_unknown
= 0,
889 /* A property ignored by backend. */
891 /* A corrupt property reported by backend. */
893 /* A property should be removed due to property merge. */
895 /* A property which is a number. */
899 typedef struct elf_property
901 unsigned int pr_type
;
902 unsigned int pr_datasz
;
905 /* For property_number, this is a number. */
907 /* Add a new one if elf_property_kind is updated. */
909 enum elf_property_kind pr_kind
;
912 typedef struct elf_property_list
914 struct elf_property_list
*next
;
915 struct elf_property property
;
918 struct bfd_elf_section_reloc_data
;
920 struct elf_backend_data
922 /* The architecture for this backend. */
923 enum bfd_architecture arch
;
925 /* An identifier used to distinguish different target specific
926 extensions to elf_obj_tdata and elf_link_hash_table structures. */
927 enum elf_target_id target_id
;
930 enum elf_target_os target_os
;
932 /* The ELF machine code (EM_xxxx) for this backend. */
933 int elf_machine_code
;
938 /* The maximum page size for this backend. */
941 /* The minimum page size for this backend. An input object will not be
942 considered page aligned unless its sections are correctly aligned for
943 pages at least this large. May be smaller than maxpagesize. */
946 /* The common page size for this backend. */
947 bfd_vma commonpagesize
;
949 /* The value of commonpagesize to use when -z relro for this backend. */
950 bfd_vma relropagesize
;
952 /* The BFD flags applied to sections created for dynamic linking. */
953 flagword dynamic_sec_flags
;
955 /* Architecture-specific data for this backend.
956 This is actually a pointer to some type like struct elf_ARCH_data. */
957 const void *arch_data
;
959 /* A function to translate an ELF RELA relocation to a BFD arelent
960 structure. Returns TRUE upon success, FALSE otherwise. */
961 bool (*elf_info_to_howto
)
962 (bfd
*, arelent
*, Elf_Internal_Rela
*);
964 /* A function to translate an ELF REL relocation to a BFD arelent
965 structure. Returns TRUE upon success, FALSE otherwise. */
966 bool (*elf_info_to_howto_rel
)
967 (bfd
*, arelent
*, Elf_Internal_Rela
*);
969 /* A function to determine whether a symbol is global when
970 partitioning the symbol table into local and global symbols.
971 This should be NULL for most targets, in which case the correct
972 thing will be done. MIPS ELF, at least on the Irix 5, has
973 special requirements. */
974 bool (*elf_backend_sym_is_global
)
977 /* The remaining functions are hooks which are called only if they
980 /* A function to permit a backend specific check on whether a
981 particular BFD format is relevant for an object file, and to
982 permit the backend to set any global information it wishes. When
983 this is called elf_elfheader is set, but anything else should be
984 used with caution. If this returns FALSE, the check_format
985 routine will return a bfd_error_wrong_format error. */
986 bool (*elf_backend_object_p
)
989 /* A function to do additional symbol processing when reading the
990 ELF symbol table. This is where any processor-specific special
991 section indices are handled. */
992 void (*elf_backend_symbol_processing
)
995 /* A function to do additional symbol processing after reading the
996 entire ELF symbol table. */
997 bool (*elf_backend_symbol_table_processing
)
998 (bfd
*, elf_symbol_type
*, unsigned int);
1000 /* A function to set the type of the info field. Processor-specific
1001 types should be handled here. */
1002 int (*elf_backend_get_symbol_type
)
1003 (Elf_Internal_Sym
*, int);
1005 /* A function to return the linker hash table entry of a symbol that
1006 might be satisfied by an archive symbol. */
1007 struct bfd_link_hash_entry
* (*elf_backend_archive_symbol_lookup
)
1008 (bfd
*, struct bfd_link_info
*, const char *);
1010 /* Return true if local section symbols should have a non-null st_name.
1011 NULL implies false. */
1012 bool (*elf_backend_name_local_section_symbols
)
1015 /* A function to do additional processing on the ELF section header
1016 just before writing it out. This is used to set the flags and
1017 type fields for some sections, or to actually write out data for
1018 unusual sections. */
1019 bool (*elf_backend_section_processing
)
1020 (bfd
*, Elf_Internal_Shdr
*);
1022 /* A function to handle unusual section types when creating BFD
1023 sections from ELF sections. */
1024 bool (*elf_backend_section_from_shdr
)
1025 (bfd
*, Elf_Internal_Shdr
*, const char *, int);
1027 /* A function to convert machine dependent ELF section header flags to
1028 BFD internal section header flags. */
1029 bool (*elf_backend_section_flags
)
1030 (const Elf_Internal_Shdr
*);
1032 /* A function that returns a struct containing ELF section flags and
1033 type for the given BFD section. */
1034 const struct bfd_elf_special_section
* (*get_sec_type_attr
)
1035 (bfd
*, asection
*);
1037 /* A function to handle unusual program segment types when creating BFD
1038 sections from ELF program segments. */
1039 bool (*elf_backend_section_from_phdr
)
1040 (bfd
*, Elf_Internal_Phdr
*, int, const char *);
1042 /* A function to set up the ELF section header for a BFD section in
1043 preparation for writing it out. This is where the flags and type
1044 fields are set for unusual sections. */
1045 bool (*elf_backend_fake_sections
)
1046 (bfd
*, Elf_Internal_Shdr
*, asection
*);
1048 /* A function to get the ELF section index for a BFD section. If
1049 this returns TRUE, the section was found. If it is a normal ELF
1050 section, *RETVAL should be left unchanged. If it is not a normal
1051 ELF section *RETVAL should be set to the SHN_xxxx index. */
1052 bool (*elf_backend_section_from_bfd_section
)
1053 (bfd
*, asection
*, int *retval
);
1055 /* If this field is not NULL, it is called by the add_symbols phase
1056 of a link just before adding a symbol to the global linker hash
1057 table. It may modify any of the fields as it wishes. If *NAME
1058 is set to NULL, the symbol will be skipped rather than being
1059 added to the hash table. This function is responsible for
1060 handling all processor dependent symbol bindings and section
1061 indices, and must set at least *FLAGS and *SEC for each processor
1062 dependent case; failure to do so will cause a link error. */
1063 bool (*elf_add_symbol_hook
)
1064 (bfd
*abfd
, struct bfd_link_info
*info
, Elf_Internal_Sym
*,
1065 const char **name
, flagword
*flags
, asection
**sec
, bfd_vma
*value
);
1067 /* If this field is not NULL, it is called by the elf_link_output_sym
1068 phase of a link for each symbol which will appear in the object file.
1069 On error, this function returns 0. 1 is returned when the symbol
1070 should be output, 2 is returned when the symbol should be discarded. */
1071 int (*elf_backend_link_output_symbol_hook
)
1072 (struct bfd_link_info
*info
, const char *, Elf_Internal_Sym
*,
1073 asection
*, struct elf_link_hash_entry
*);
1075 /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend
1076 linker the first time it encounters a dynamic object in the link.
1077 This function must create any sections required for dynamic
1078 linking. The ABFD argument is a dynamic object. The .interp,
1079 .dynamic, .dynsym, .dynstr, and .hash functions have already been
1080 created, and this function may modify the section flags if
1081 desired. This function will normally create the .got and .plt
1082 sections, but different backends have different requirements. */
1083 bool (*elf_backend_create_dynamic_sections
)
1084 (bfd
*abfd
, struct bfd_link_info
*info
);
1086 /* When creating a shared library, determine whether to omit the
1087 dynamic symbol for the section. */
1088 bool (*elf_backend_omit_section_dynsym
)
1089 (bfd
*output_bfd
, struct bfd_link_info
*info
, asection
*osec
);
1091 /* Return TRUE if relocations of targets are compatible to the extent
1092 that CHECK_RELOCS will properly process them. PR 4424. */
1093 bool (*relocs_compatible
) (const bfd_target
*, const bfd_target
*);
1095 /* The CHECK_RELOCS function is called by the add_symbols phase of
1096 the ELF backend linker. It is called once for each section with
1097 relocs of an object file, just after the symbols for the object
1098 file have been added to the global linker hash table. The
1099 function must look through the relocs and do any special handling
1100 required. This generally means allocating space in the global
1101 offset table, and perhaps allocating space for a reloc. The
1102 relocs are always passed as Rela structures; if the section
1103 actually uses Rel structures, the r_addend field will always be
1105 bool (*check_relocs
)
1106 (bfd
*abfd
, struct bfd_link_info
*info
, asection
*o
,
1107 const Elf_Internal_Rela
*relocs
);
1109 /* The CHECK_DIRECTIVES function is called once per input file by
1110 the add_symbols phase of the ELF backend linker. The function
1111 must inspect the bfd and create any additional symbols according
1112 to any custom directives in the bfd. */
1113 bool (*check_directives
)
1114 (bfd
*abfd
, struct bfd_link_info
*info
);
1116 /* The NOTICE_AS_NEEDED function is called as the linker is about to
1117 handle an as-needed lib (ACT = notice_as_needed), and after the
1118 linker has decided to keep the lib (ACT = notice_needed) or when
1119 the lib is not needed (ACT = notice_not_needed). */
1120 bool (*notice_as_needed
)
1121 (bfd
*abfd
, struct bfd_link_info
*info
, enum notice_asneeded_action act
);
1123 /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
1124 linker for every symbol which is defined by a dynamic object and
1125 referenced by a regular object. This is called after all the
1126 input files have been seen, but before the SIZE_DYNAMIC_SECTIONS
1127 function has been called. The hash table entry should be
1128 bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be
1129 defined in a section from a dynamic object. Dynamic object
1130 sections are not included in the final link, and this function is
1131 responsible for changing the value to something which the rest of
1132 the link can deal with. This will normally involve adding an
1133 entry to the .plt or .got or some such section, and setting the
1134 symbol to point to that. */
1135 bool (*elf_backend_adjust_dynamic_symbol
)
1136 (struct bfd_link_info
*info
, struct elf_link_hash_entry
*h
);
1138 /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker
1139 after all the linker input files have been seen but before the
1140 section sizes have been set. This is called after
1141 ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS. */
1142 bool (*elf_backend_always_size_sections
)
1143 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1145 /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend
1146 linker after all the linker input files have been seen but before
1147 the sections sizes have been set. This is called after
1148 ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols.
1149 It is only called when linking against a dynamic object. It must
1150 set the sizes of the dynamic sections, and may fill in their
1151 contents as well. The generic ELF linker can handle the .dynsym,
1152 .dynstr and .hash sections. This function must handle the
1153 .interp section and any sections created by the
1154 CREATE_DYNAMIC_SECTIONS entry point. */
1155 bool (*elf_backend_size_dynamic_sections
)
1156 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1158 /* The STRIP_ZERO_SIZED_DYNAMIC_SECTIONS function is called by the
1159 ELF backend linker to strip zero-sized dynamic sections after
1160 the section sizes have been set. */
1161 bool (*elf_backend_strip_zero_sized_dynamic_sections
)
1162 (struct bfd_link_info
*info
);
1164 /* Set TEXT_INDEX_SECTION and DATA_INDEX_SECTION, the output sections
1165 we keep to use as a base for relocs and symbols. */
1166 void (*elf_backend_init_index_section
)
1167 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1169 /* The RELOCATE_SECTION function is called by the ELF backend linker
1170 to handle the relocations for a section.
1172 The relocs are always passed as Rela structures; if the section
1173 actually uses Rel structures, the r_addend field will always be
1176 This function is responsible for adjust the section contents as
1177 necessary, and (if using Rela relocs and generating a
1178 relocatable output file) adjusting the reloc addend as
1181 This function does not have to worry about setting the reloc
1182 address or the reloc symbol index.
1184 LOCAL_SYMS is a pointer to the swapped in local symbols.
1186 LOCAL_SECTIONS is an array giving the section in the input file
1187 corresponding to the st_shndx field of each local symbol.
1189 The global hash table entry for the global symbols can be found
1190 via elf_sym_hashes (input_bfd).
1192 When generating relocatable output, this function must handle
1193 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
1194 going to be the section symbol corresponding to the output
1195 section, which means that the addend must be adjusted
1198 Returns FALSE on error, TRUE on success, 2 if successful and
1199 relocations should be written for this section. */
1200 int (*elf_backend_relocate_section
)
1201 (bfd
*output_bfd
, struct bfd_link_info
*info
, bfd
*input_bfd
,
1202 asection
*input_section
, bfd_byte
*contents
, Elf_Internal_Rela
*relocs
,
1203 Elf_Internal_Sym
*local_syms
, asection
**local_sections
);
1205 /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend
1206 linker just before it writes a symbol out to the .dynsym section.
1207 The processor backend may make any required adjustment to the
1208 symbol. It may also take the opportunity to set contents of the
1209 dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on
1210 all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called
1211 on those symbols which are defined by a dynamic object. */
1212 bool (*elf_backend_finish_dynamic_symbol
)
1213 (bfd
*output_bfd
, struct bfd_link_info
*info
,
1214 struct elf_link_hash_entry
*h
, Elf_Internal_Sym
*sym
);
1216 /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend
1217 linker just before it writes all the dynamic sections out to the
1218 output file. The FINISH_DYNAMIC_SYMBOL will have been called on
1219 all dynamic symbols. */
1220 bool (*elf_backend_finish_dynamic_sections
)
1221 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1223 /* A function to do any beginning processing needed for the ELF file
1224 before building the ELF headers and computing file positions. */
1225 void (*elf_backend_begin_write_processing
)
1226 (bfd
*, struct bfd_link_info
*);
1228 /* A function to do any final processing needed for the ELF file
1229 before writing it out. */
1230 bool (*elf_backend_final_write_processing
)
1233 /* This function is called by get_program_header_size. It should
1234 return the number of additional program segments which this BFD
1235 will need. It should return -1 on error. */
1236 int (*elf_backend_additional_program_headers
)
1237 (bfd
*, struct bfd_link_info
*);
1239 /* This function is called to modify an existing segment map in a
1240 backend specific fashion. */
1241 bool (*elf_backend_modify_segment_map
)
1242 (bfd
*, struct bfd_link_info
*);
1244 /* This function is called to modify program headers just before
1245 they are written. */
1246 bool (*elf_backend_modify_headers
)
1247 (bfd
*, struct bfd_link_info
*);
1249 /* This function is called to see if the PHDR header should be
1250 checked for validity. */
1251 bool (*elf_backend_allow_non_load_phdr
)
1252 (bfd
*, const Elf_Internal_Phdr
*, unsigned);
1254 /* This function is called before section garbage collection to
1255 mark entry symbol sections. */
1257 (struct bfd_link_info
*);
1259 /* This function is called during section garbage collection to
1260 mark sections that define global symbols. */
1261 bool (*gc_mark_dynamic_ref
)
1262 (struct elf_link_hash_entry
*, void *);
1264 /* This function is called during section gc to discover the section a
1265 particular relocation refers to. */
1266 elf_gc_mark_hook_fn gc_mark_hook
;
1268 /* This function, if defined, is called after the first gc marking pass
1269 to allow the backend to mark additional sections. */
1270 bool (*gc_mark_extra_sections
)
1271 (struct bfd_link_info
*, elf_gc_mark_hook_fn
);
1273 /* This function is called to initialise ELF file header info.
1274 Customised versions can modify things like the OS and ABI version. */
1275 bool (*elf_backend_init_file_header
)
1276 (bfd
*, struct bfd_link_info
*);
1278 /* This function, if defined, prints a symbol to file and returns the
1279 name of the symbol to be printed. It should return NULL to fall
1280 back to default symbol printing. */
1281 const char *(*elf_backend_print_symbol_all
)
1282 (bfd
*, void *, asymbol
*);
1284 /* This function, if defined, is called after all local symbols and
1285 global symbols converted to locals are emitted into the symtab
1286 section. It allows the backend to emit special local symbols
1287 not handled in the hash table. */
1288 bool (*elf_backend_output_arch_local_syms
)
1289 (bfd
*, struct bfd_link_info
*, void *,
1290 int (*) (void *, const char *, Elf_Internal_Sym
*, asection
*,
1291 struct elf_link_hash_entry
*));
1293 /* This function, if defined, is called after all symbols are emitted
1294 into the symtab section. It allows the backend to emit special
1295 global symbols not handled in the hash table. */
1296 bool (*elf_backend_output_arch_syms
)
1297 (bfd
*, struct bfd_link_info
*, void *,
1298 int (*) (void *, const char *, Elf_Internal_Sym
*, asection
*,
1299 struct elf_link_hash_entry
*));
1301 /* Filter what symbols of the output file to include in the import
1302 library if one is created. */
1303 unsigned int (*elf_backend_filter_implib_symbols
)
1304 (bfd
*, struct bfd_link_info
*, asymbol
**, long);
1306 /* Copy any information related to dynamic linking from a pre-existing
1307 symbol to a newly created symbol. Also called to copy flags and
1308 other back-end info to a weakdef, in which case the symbol is not
1309 newly created and plt/got refcounts and dynamic indices should not
1311 void (*elf_backend_copy_indirect_symbol
)
1312 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
1313 struct elf_link_hash_entry
*);
1315 /* Modify any information related to dynamic linking such that the
1316 symbol is not exported. */
1317 void (*elf_backend_hide_symbol
)
1318 (struct bfd_link_info
*, struct elf_link_hash_entry
*, bool);
1320 /* A function to do additional symbol fixup, called by
1321 _bfd_elf_fix_symbol_flags. */
1322 bool (*elf_backend_fixup_symbol
)
1323 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
1325 /* Merge the backend specific symbol attribute. */
1326 void (*elf_backend_merge_symbol_attribute
)
1327 (struct elf_link_hash_entry
*, unsigned int, bool, bool);
1329 /* This function, if defined, will return a string containing the
1330 name of a target-specific dynamic tag. */
1331 char *(*elf_backend_get_target_dtag
)
1334 /* Decide whether an undefined symbol is special and can be ignored.
1335 This is the case for OPTIONAL symbols on IRIX. */
1336 bool (*elf_backend_ignore_undef_symbol
)
1337 (struct elf_link_hash_entry
*);
1339 /* Emit relocations. Overrides default routine for emitting relocs,
1340 except during a relocatable link, or if all relocs are being emitted. */
1341 bool (*elf_backend_emit_relocs
)
1342 (bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*,
1343 struct elf_link_hash_entry
**);
1345 /* Update relocations. It is allowed to change the number and the order.
1346 In such a case hashes should be invalidated. */
1347 void (*elf_backend_update_relocs
)
1348 (asection
*, struct bfd_elf_section_reloc_data
*);
1350 /* Count relocations. Not called for relocatable links
1351 or if all relocs are being preserved in the output. */
1352 unsigned int (*elf_backend_count_relocs
)
1353 (struct bfd_link_info
*, asection
*);
1355 /* Count additionals relocations. Called for relocatable links if
1356 additional relocations needs to be created. */
1357 unsigned int (*elf_backend_count_additional_relocs
)
1360 /* Say whether to sort relocs output by ld -r and ld --emit-relocs,
1361 by r_offset. If NULL, default to true. */
1362 bool (*sort_relocs_p
)
1365 /* This function, if defined, is called when an NT_PRSTATUS note is found
1367 bool (*elf_backend_grok_prstatus
)
1368 (bfd
*, Elf_Internal_Note
*);
1370 /* This function, if defined, is called when an NT_PSINFO or NT_PRPSINFO
1371 note is found in a core file. */
1372 bool (*elf_backend_grok_psinfo
)
1373 (bfd
*, Elf_Internal_Note
*);
1375 /* This function, if defined, is called when a "FreeBSD" NT_PRSTATUS
1376 note is found in a core file. */
1377 bool (*elf_backend_grok_freebsd_prstatus
)
1378 (bfd
*, Elf_Internal_Note
*);
1380 /* This function, if defined, is called to write a note to a corefile. */
1381 char *(*elf_backend_write_core_note
)
1382 (bfd
*abfd
, char *buf
, int *bufsiz
, int note_type
, ...);
1384 /* This function, if defined, is called to convert target-specific
1385 section flag names into hex values. */
1386 flagword (*elf_backend_lookup_section_flags_hook
)
1389 /* This function returns class of a reloc type. */
1390 enum elf_reloc_type_class (*elf_backend_reloc_type_class
)
1391 (const struct bfd_link_info
*, const asection
*, const Elf_Internal_Rela
*);
1393 /* This function, if defined, removes information about discarded functions
1394 from other sections which mention them. */
1395 bool (*elf_backend_discard_info
)
1396 (bfd
*, struct elf_reloc_cookie
*, struct bfd_link_info
*);
1398 /* This function, if defined, signals that the function above has removed
1399 the discarded relocations for this section. */
1400 bool (*elf_backend_ignore_discarded_relocs
)
1403 /* What to do when ld finds relocations against symbols defined in
1404 discarded sections. */
1405 unsigned int (*action_discarded
)
1408 /* This function returns the width of FDE pointers in bytes, or 0 if
1409 that can't be determined for some reason. The default definition
1410 goes by the bfd's EI_CLASS. */
1411 unsigned int (*elf_backend_eh_frame_address_size
)
1412 (bfd
*, const asection
*);
1414 /* These functions tell elf-eh-frame whether to attempt to turn
1415 absolute or lsda encodings into pc-relative ones. The default
1416 definition enables these transformations. */
1417 bool (*elf_backend_can_make_relative_eh_frame
)
1418 (bfd
*, struct bfd_link_info
*, asection
*);
1419 bool (*elf_backend_can_make_lsda_relative_eh_frame
)
1420 (bfd
*, struct bfd_link_info
*, asection
*);
1422 /* This function returns an encoding after computing the encoded
1423 value (and storing it in ENCODED) for the given OFFSET into OSEC,
1424 to be stored in at LOC_OFFSET into the LOC_SEC input section.
1425 The default definition chooses a 32-bit PC-relative encoding. */
1426 bfd_byte (*elf_backend_encode_eh_address
)
1427 (bfd
*abfd
, struct bfd_link_info
*info
,
1428 asection
*osec
, bfd_vma offset
,
1429 asection
*loc_sec
, bfd_vma loc_offset
,
1432 /* This function, if defined, may write out the given section.
1433 Returns TRUE if it did so and FALSE if the caller should. */
1434 bool (*elf_backend_write_section
)
1435 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
1437 /* This function, if defined, returns TRUE if it is section symbols
1438 only that are considered local for the purpose of partitioning the
1439 symbol table into local and global symbols. This should be NULL
1440 for most targets, in which case the correct thing will be done.
1441 MIPS ELF, at least on the Irix 5, has special requirements. */
1442 bool (*elf_backend_elfsym_local_is_section
)
1445 /* The level of IRIX compatibility we're striving for.
1446 MIPS ELF specific function. */
1447 irix_compat_t (*elf_backend_mips_irix_compat
)
1450 reloc_howto_type
*(*elf_backend_mips_rtype_to_howto
)
1451 (bfd
*, unsigned int, bool);
1453 /* The swapping table to use when dealing with ECOFF information.
1454 Used for the MIPS ELF .mdebug section. */
1455 const struct ecoff_debug_swap
*elf_backend_ecoff_debug_swap
;
1457 /* This function implements `bfd_elf_bfd_from_remote_memory';
1458 see elf.c, elfcode.h. */
1459 bfd
*(*elf_backend_bfd_from_remote_memory
)
1460 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
1461 int (*target_read_memory
) (bfd_vma vma
, bfd_byte
*myaddr
,
1462 bfd_size_type len
));
1464 bool (*elf_backend_core_find_build_id
) (bfd
*, bfd_vma
);
1466 /* This function is used by `_bfd_elf_get_synthetic_symtab';
1468 bfd_vma (*plt_sym_val
) (bfd_vma
, const asection
*, const arelent
*);
1470 /* Is symbol defined in common section? */
1471 bool (*common_definition
) (Elf_Internal_Sym
*);
1473 /* Return a common section index for section. */
1474 unsigned int (*common_section_index
) (asection
*);
1476 /* Return a common section for section. */
1477 asection
*(*common_section
) (asection
*);
1479 /* Return TRUE if we can merge 2 definitions. */
1480 bool (*merge_symbol
) (struct elf_link_hash_entry
*,
1481 const Elf_Internal_Sym
*, asection
**,
1483 bfd
*, const asection
*);
1485 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
1486 bool (*elf_hash_symbol
) (struct elf_link_hash_entry
*);
1488 /* If non-NULL, called to register the location of XLAT_LOC within
1489 .MIPS.xhash at which real final dynindx for H will be written.
1490 If XLAT_LOC is zero, the symbol is not included in
1491 .MIPS.xhash and no dynindx will be written. */
1492 void (*record_xhash_symbol
)
1493 (struct elf_link_hash_entry
*h
, bfd_vma xlat_loc
);
1495 /* Return TRUE if type is a function symbol type. */
1496 bool (*is_function_type
) (unsigned int type
);
1498 /* If the ELF symbol SYM might be a function in SEC, return the
1499 function size and set *CODE_OFF to the function's entry point,
1500 otherwise return zero. */
1501 bfd_size_type (*maybe_function_sym
) (const asymbol
*sym
, asection
*sec
,
1504 /* Given NAME, the name of a relocation section stripped of its
1505 .rel/.rela prefix, return the section in ABFD to which the
1506 relocations apply. */
1507 asection
*(*get_reloc_section
) (bfd
*abfd
, const char *name
);
1509 /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
1510 has a type >= SHT_LOOS. Returns TRUE if the fields were initialised,
1511 FALSE otherwise. Can be called multiple times for a given section,
1512 until it returns TRUE. Most of the times it is called ISECTION will be
1513 set to an input section that might be associated with the output section.
1514 The last time that it is called, ISECTION will be set to NULL. */
1515 bool (*elf_backend_copy_special_section_fields
)
1516 (const bfd
*ibfd
, bfd
*obfd
, const Elf_Internal_Shdr
*isection
,
1517 Elf_Internal_Shdr
*osection
);
1519 /* Used to handle bad SHF_LINK_ORDER input. */
1520 void (*link_order_error_handler
) (const char *, ...);
1522 /* Name of the PLT relocation section. */
1523 const char *relplt_name
;
1525 /* Alternate EM_xxxx machine codes for this backend. */
1526 int elf_machine_alt1
;
1527 int elf_machine_alt2
;
1529 const struct elf_size_info
*s
;
1531 /* An array of target specific special sections. */
1532 const struct bfd_elf_special_section
*special_sections
;
1534 /* The size in bytes of the header for the GOT. This includes the
1535 so-called reserved entries on some systems. */
1536 bfd_vma got_header_size
;
1538 /* The size of the GOT entry for the symbol pointed to by H if non-NULL,
1539 otherwise by the local symbol with index SYMNDX in IBFD. */
1540 bfd_vma (*got_elt_size
) (bfd
*, struct bfd_link_info
*,
1541 struct elf_link_hash_entry
*h
,
1542 bfd
*ibfd
, unsigned long symndx
);
1544 /* The vendor name to use for a processor-standard attributes section. */
1545 const char *obj_attrs_vendor
;
1547 /* The section name to use for a processor-standard attributes section. */
1548 const char *obj_attrs_section
;
1550 /* Return 1, 2 or 3 to indicate what type of arguments a
1551 processor-specific tag takes. */
1552 int (*obj_attrs_arg_type
) (int);
1554 /* The section type to use for an attributes section. */
1555 unsigned int obj_attrs_section_type
;
1557 /* This function determines the order in which any attributes are
1558 written. It must be defined for input in the range
1559 LEAST_KNOWN_OBJ_ATTRIBUTE..NUM_KNOWN_OBJ_ATTRIBUTES-1 (this range
1560 is used in order to make unity easy). The returned value is the
1561 actual tag number to place in the input position. */
1562 int (*obj_attrs_order
) (int);
1564 /* Handle merging unknown attributes; either warn and return TRUE,
1565 or give an error and return FALSE. */
1566 bool (*obj_attrs_handle_unknown
) (bfd
*, int);
1568 /* Parse GNU properties. Return the property kind. If the property
1569 is corrupt, issue an error message and return property_corrupt. */
1570 enum elf_property_kind (*parse_gnu_properties
) (bfd
*, unsigned int,
1574 /* Merge GNU properties. Return TRUE if property is updated. */
1575 bool (*merge_gnu_properties
) (struct bfd_link_info
*, bfd
*, bfd
*,
1576 elf_property
*, elf_property
*);
1578 /* Set up GNU properties. */
1579 bfd
*(*setup_gnu_properties
) (struct bfd_link_info
*);
1581 /* Fix up GNU properties. */
1582 void (*fixup_gnu_properties
) (struct bfd_link_info
*,
1583 elf_property_list
**);
1585 /* Encoding used for compact EH tables. */
1586 int (*compact_eh_encoding
) (struct bfd_link_info
*);
1588 /* Opcode representing no unwind. */
1589 int (*cant_unwind_opcode
) (struct bfd_link_info
*);
1591 /* Called when emitting an ELF symbol whoes input version had an
1592 ST_SHNDX field set to a value in the range SHN_LOPROC..SHN_HIOS.
1593 Returns the value to be installed in the ST_SHNDX field of the
1594 emitted symbol. If not defined, the value is left unchanged. */
1595 unsigned int (*symbol_section_index
) (bfd
*, elf_symbol_type
*);
1597 /* Called when a section has extra reloc sections. */
1598 bool (*init_secondary_reloc_section
) (bfd
*, Elf_Internal_Shdr
*,
1599 const char *, unsigned int);
1601 /* Called when after loading the normal relocs for a section. */
1602 bool (*slurp_secondary_relocs
) (bfd
*, asection
*, asymbol
**, bool);
1604 /* Called after writing the normal relocs for a section. */
1605 bool (*write_secondary_relocs
) (bfd
*, asection
*);
1607 /* This is non-zero if static TLS segments require a special alignment. */
1608 unsigned static_tls_alignment
;
1610 /* Alignment for the PT_GNU_STACK segment. */
1611 unsigned stack_align
;
1613 /* Flag bits to assign to a section of type SHT_STRTAB. */
1614 unsigned long elf_strtab_flags
;
1616 /* This is TRUE if the linker should act like collect and gather
1617 global constructors and destructors by name. This is TRUE for
1618 MIPS ELF because the Irix 5 tools can not handle the .init
1620 unsigned collect
: 1;
1622 /* This is TRUE if the linker should ignore changes to the type of a
1623 symbol. This is TRUE for MIPS ELF because some Irix 5 objects
1624 record undefined functions as STT_OBJECT although the definitions
1626 unsigned type_change_ok
: 1;
1628 /* Whether the backend may use REL relocations. (Some backends use
1629 both REL and RELA relocations, and this flag is set for those
1631 unsigned may_use_rel_p
: 1;
1633 /* Whether the backend may use RELA relocations. (Some backends use
1634 both REL and RELA relocations, and this flag is set for those
1636 unsigned may_use_rela_p
: 1;
1638 /* Whether the default relocation type is RELA. If a backend with
1639 this flag set wants REL relocations for a particular section,
1640 it must note that explicitly. Similarly, if this flag is clear,
1641 and the backend wants RELA relocations for a particular
1643 unsigned default_use_rela_p
: 1;
1645 /* True if PLT and copy relocations should be RELA by default. */
1646 unsigned rela_plts_and_copies_p
: 1;
1648 /* Set if RELA relocations for a relocatable link can be handled by
1649 generic code. Backends that set this flag need do nothing in the
1650 backend relocate_section routine for relocatable linking. */
1651 unsigned rela_normal
: 1;
1653 /* Set if DT_REL/DT_RELA/DT_RELSZ/DT_RELASZ should not include PLT
1655 unsigned dtrel_excludes_plt
: 1;
1657 /* TRUE if addresses "naturally" sign extend. This is used when
1658 swapping in from Elf32 when BFD64. */
1659 unsigned sign_extend_vma
: 1;
1661 unsigned want_got_plt
: 1;
1662 unsigned plt_readonly
: 1;
1663 unsigned want_plt_sym
: 1;
1664 unsigned plt_not_loaded
: 1;
1665 unsigned plt_alignment
: 4;
1666 unsigned can_gc_sections
: 1;
1667 unsigned can_refcount
: 1;
1668 unsigned want_got_sym
: 1;
1669 unsigned want_dynbss
: 1;
1670 unsigned want_dynrelro
: 1;
1672 /* Targets which do not support physical addressing often require
1673 that the p_paddr field in the section header to be set to zero.
1674 This field indicates whether this behavior is required. */
1675 unsigned want_p_paddr_set_to_zero
: 1;
1677 /* Target has broken hardware and/or kernel that requires pages not
1678 to be mapped twice with different permissions. */
1679 unsigned no_page_alias
: 1;
1681 /* True if an object file lacking a .note.GNU-stack section
1682 should be assumed to be requesting exec stack. At least one
1683 other file in the link needs to have a .note.GNU-stack section
1684 for a PT_GNU_STACK segment to be created. */
1685 unsigned default_execstack
: 1;
1687 /* True if elf_section_data(sec)->this_hdr.contents is sec->rawsize
1688 in length rather than sec->size in length, if sec->rawsize is
1689 non-zero and smaller than sec->size. */
1690 unsigned caches_rawsize
: 1;
1692 /* Address of protected data defined in the shared library may be
1693 external, i.e., due to copy relocation. */
1694 unsigned extern_protected_data
: 1;
1696 /* True if `_bfd_elf_link_renumber_dynsyms' must be called even for
1698 unsigned always_renumber_dynsyms
: 1;
1700 /* True if the 32-bit Linux PRPSINFO structure's `pr_uid' and `pr_gid'
1701 members use a 16-bit data type. */
1702 unsigned linux_prpsinfo32_ugid16
: 1;
1704 /* True if the 64-bit Linux PRPSINFO structure's `pr_uid' and `pr_gid'
1705 members use a 16-bit data type. */
1706 unsigned linux_prpsinfo64_ugid16
: 1;
1709 /* Information about reloc sections associated with a bfd_elf_section_data
1711 struct bfd_elf_section_reloc_data
1713 /* The ELF header for the reloc section associated with this
1715 Elf_Internal_Shdr
*hdr
;
1716 /* The number of relocations currently assigned to HDR. */
1718 /* The ELF section number of the reloc section. Only used for an
1721 /* Used by the backend linker to store the symbol hash table entries
1722 associated with relocs against global symbols. */
1723 struct elf_link_hash_entry
**hashes
;
1726 /* Information stored for each BFD section in an ELF file. This
1727 structure is allocated by elf_new_section_hook. */
1729 struct bfd_elf_section_data
1731 /* The ELF header for this section. */
1732 Elf_Internal_Shdr this_hdr
;
1734 /* INPUT_SECTION_FLAGS if specified in the linker script. */
1735 struct flag_info
*section_flag_info
;
1737 /* Information about the REL and RELA reloc sections associated
1738 with this section, if any. */
1739 struct bfd_elf_section_reloc_data rel
, rela
;
1741 /* The ELF section number of this section. */
1744 /* Used by the backend linker when generating a shared library to
1745 record the dynamic symbol index for a section symbol
1746 corresponding to this section. A value of 0 means that there is
1747 no dynamic symbol for this section. */
1750 /* A pointer to the linked-to section for SHF_LINK_ORDER. */
1751 asection
*linked_to
;
1753 /* A pointer to the swapped relocs. If the section uses REL relocs,
1754 rather than RELA, all the r_addend fields will be zero. This
1755 pointer may be NULL. It is used by the backend linker. */
1756 Elf_Internal_Rela
*relocs
;
1758 /* A pointer to a linked list tracking dynamic relocs copied for
1762 /* A pointer to the bfd section used for dynamic relocs. */
1766 /* Group name, if this section is a member of a group. */
1769 /* Group signature sym, if this is the SHT_GROUP section. */
1770 struct bfd_symbol
*id
;
1773 /* For a member of a group, points to the SHT_GROUP section.
1774 NULL for the SHT_GROUP section itself and non-group sections. */
1775 asection
*sec_group
;
1777 /* A linked list of member sections in the group. Circular when used by
1778 the linker. For the SHT_GROUP section, points at first member. */
1779 asection
*next_in_group
;
1781 /* The FDEs associated with this section. The u.fde.next_in_section
1782 field acts as a chain pointer. */
1783 struct eh_cie_fde
*fde_list
;
1785 /* Link from a text section to its .eh_frame_entry section. */
1786 asection
*eh_frame_entry
;
1788 /* TRUE if the section has secondary reloc sections associated with it.
1789 FIXME: In the future it might be better to change this into a list
1790 of secondary reloc sections, making lookup easier and faster. */
1791 bool has_secondary_relocs
;
1793 /* A pointer used for various section optimizations. */
1797 #define elf_section_data(sec) ((struct bfd_elf_section_data*)(sec)->used_by_bfd)
1798 #define elf_linked_to_section(sec) (elf_section_data(sec)->linked_to)
1799 #define elf_section_type(sec) (elf_section_data(sec)->this_hdr.sh_type)
1800 #define elf_section_flags(sec) (elf_section_data(sec)->this_hdr.sh_flags)
1801 #define elf_section_info(sec) (elf_section_data(sec)->this_hdr.sh_info)
1802 #define elf_group_name(sec) (elf_section_data(sec)->group.name)
1803 #define elf_group_id(sec) (elf_section_data(sec)->group.id)
1804 #define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group)
1805 #define elf_fde_list(sec) (elf_section_data(sec)->fde_list)
1806 #define elf_sec_group(sec) (elf_section_data(sec)->sec_group)
1807 #define elf_section_eh_frame_entry(sec) (elf_section_data(sec)->eh_frame_entry)
1809 #define xvec_get_elf_backend_data(xvec) \
1810 ((const struct elf_backend_data *) (xvec)->backend_data)
1812 #define get_elf_backend_data(abfd) \
1813 xvec_get_elf_backend_data ((abfd)->xvec)
1815 /* The least object attributes (within an attributes subsection) known
1816 for any target. Some code assumes that the value 0 is not used and
1817 the field for that attribute can instead be used as a marker to
1818 indicate that attributes have been initialized. */
1819 #define LEAST_KNOWN_OBJ_ATTRIBUTE 2
1821 /* The maximum number of known object attributes for any target. */
1822 #define NUM_KNOWN_OBJ_ATTRIBUTES 71
1824 /* The value of an object attribute. The type indicates whether the attribute
1825 holds and integer, a string, or both. It can also indicate that there can
1826 be no default (i.e. all values must be written to file, even zero), or
1827 that the value is in error and should not be written to file. */
1829 typedef struct obj_attribute
1831 #define ATTR_TYPE_FLAG_INT_VAL (1 << 0)
1832 #define ATTR_TYPE_FLAG_STR_VAL (1 << 1)
1833 #define ATTR_TYPE_FLAG_NO_DEFAULT (1 << 2)
1834 #define ATTR_TYPE_FLAG_ERROR (1 << 3)
1836 #define ATTR_TYPE_HAS_INT_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_INT_VAL)
1837 #define ATTR_TYPE_HAS_STR_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_STR_VAL)
1838 #define ATTR_TYPE_HAS_NO_DEFAULT(TYPE) ((TYPE) & ATTR_TYPE_FLAG_NO_DEFAULT)
1839 #define ATTR_TYPE_HAS_ERROR(TYPE) ((TYPE) & ATTR_TYPE_FLAG_ERROR)
1846 typedef struct obj_attribute_list
1848 struct obj_attribute_list
*next
;
1851 } obj_attribute_list
;
1853 /* Object attributes may either be defined by the processor ABI, index
1854 OBJ_ATTR_PROC in the *_obj_attributes arrays, or be GNU-specific
1855 (and possibly also processor-specific), index OBJ_ATTR_GNU. */
1856 #define OBJ_ATTR_PROC 0
1857 #define OBJ_ATTR_GNU 1
1858 #define OBJ_ATTR_FIRST OBJ_ATTR_PROC
1859 #define OBJ_ATTR_LAST OBJ_ATTR_GNU
1861 /* The following object attribute tags are taken as generic, for all
1862 targets and for "gnu" where there is no target standard. */
1869 Tag_compatibility
= 32
1872 /* The following struct stores information about every SystemTap section
1873 found in the object file. */
1876 struct sdt_note
*next
;
1881 /* tdata information grabbed from an elf core file. */
1882 struct core_elf_obj_tdata
1891 /* Extra tdata information held for output ELF BFDs. */
1892 struct output_elf_obj_tdata
1894 struct elf_segment_map
*seg_map
;
1895 struct elf_strtab_hash
*strtab_ptr
;
1897 /* STT_SECTION symbols for each section */
1898 asymbol
**section_syms
;
1900 /* Used to determine if PT_GNU_EH_FRAME segment header should be
1902 asection
*eh_frame_hdr
;
1904 /* NT_GNU_BUILD_ID note type info. */
1907 bool (*after_write_object_contents
) (bfd
*);
1912 /* Records the result of `get_program_header_size'. */
1913 bfd_size_type program_header_size
;
1915 /* Used when laying out sections. */
1916 file_ptr next_file_pos
;
1918 /* Linker information. */
1919 struct bfd_link_info
*link_info
;
1921 int num_section_syms
;
1922 unsigned int shstrtab_section
, strtab_section
;
1924 /* Segment flags for the PT_GNU_STACK segment. */
1925 unsigned int stack_flags
;
1927 /* Used to determine if the e_flags field has been initialized */
1931 /* Indicate if the bfd contains SHF_GNU_MBIND/SHF_GNU_RETAIN sections or
1932 symbols that have the STT_GNU_IFUNC symbol type or STB_GNU_UNIQUE
1933 binding. Used to set the osabi field in the ELF header structure. */
1936 elf_gnu_osabi_mbind
= 1 << 0,
1937 elf_gnu_osabi_ifunc
= 1 << 1,
1938 elf_gnu_osabi_unique
= 1 << 2,
1939 elf_gnu_osabi_retain
= 1 << 3,
1942 typedef struct elf_section_list
1944 Elf_Internal_Shdr hdr
;
1946 struct elf_section_list
* next
;
1949 enum dynamic_lib_link_class
{
1953 DYN_NO_ADD_NEEDED
= 4,
1957 /* Some private data is stashed away for future use using the tdata pointer
1958 in the bfd structure. */
1960 struct elf_obj_tdata
1962 Elf_Internal_Ehdr elf_header
[1]; /* Actual data, but ref like ptr */
1963 Elf_Internal_Shdr
**elf_sect_ptr
;
1964 Elf_Internal_Phdr
*phdr
;
1965 Elf_Internal_Shdr symtab_hdr
;
1966 Elf_Internal_Shdr shstrtab_hdr
;
1967 Elf_Internal_Shdr strtab_hdr
;
1968 Elf_Internal_Shdr dynsymtab_hdr
;
1969 Elf_Internal_Shdr dynstrtab_hdr
;
1970 Elf_Internal_Shdr dynversym_hdr
;
1971 Elf_Internal_Shdr dynverref_hdr
;
1972 Elf_Internal_Shdr dynverdef_hdr
;
1973 elf_section_list
* symtab_shndx_list
;
1974 bfd_vma gp
; /* The gp value */
1975 unsigned int gp_size
; /* The gp size */
1976 unsigned int num_elf_sections
; /* elf_sect_ptr size */
1977 unsigned char *being_created
;
1979 /* A mapping from external symbols to entries in the linker hash
1980 table, used when linking. This is indexed by the symbol index
1981 minus the sh_info field of the symbol table header. */
1982 struct elf_link_hash_entry
**sym_hashes
;
1984 /* Track usage and final offsets of GOT entries for local symbols.
1985 This array is indexed by symbol index. Elements are used
1986 identically to "got" in struct elf_link_hash_entry. */
1989 bfd_signed_vma
*refcounts
;
1991 struct got_entry
**ents
;
1994 /* The linker ELF emulation code needs to let the backend ELF linker
1995 know what filename should be used for a dynamic object if the
1996 dynamic object is found using a search. The emulation code then
1997 sometimes needs to know what name was actually used. Until the
1998 file has been added to the linker symbol table, this field holds
1999 the name the linker wants. After it has been added, it holds the
2000 name actually used, which will be the DT_SONAME entry if there is
2002 const char *dt_name
;
2004 /* The linker emulation needs to know what audit libs
2005 are used by a dynamic object. */
2006 const char *dt_audit
;
2008 /* Used by find_nearest_line entry point. */
2011 /* A place to stash dwarf1 info for this bfd. */
2012 struct dwarf1_debug
*dwarf1_find_line_info
;
2014 /* A place to stash dwarf2 info for this bfd. */
2015 void *dwarf2_find_line_info
;
2017 /* Stash away info for yet another find line/function variant. */
2018 void *elf_find_function_cache
;
2020 /* Number of symbol version definitions we are about to emit. */
2021 unsigned int cverdefs
;
2023 /* Number of symbol version references we are about to emit. */
2024 unsigned int cverrefs
;
2026 /* Symbol version definitions in external objects. */
2027 Elf_Internal_Verdef
*verdef
;
2029 /* Symbol version references to external objects. */
2030 Elf_Internal_Verneed
*verref
;
2032 /* A pointer to the .eh_frame section. */
2033 asection
*eh_frame_section
;
2035 /* Symbol buffer. */
2038 /* List of GNU properties. Will be updated by setup_gnu_properties
2039 after all input GNU properties are merged for output. */
2040 elf_property_list
*properties
;
2042 obj_attribute known_obj_attributes
[2][NUM_KNOWN_OBJ_ATTRIBUTES
];
2043 obj_attribute_list
*other_obj_attributes
[2];
2045 /* Linked-list containing information about every Systemtap section
2046 found in the object file. Each section corresponds to one entry
2048 struct sdt_note
*sdt_note_head
;
2050 Elf_Internal_Shdr
**group_sect_ptr
;
2051 unsigned int num_group
;
2053 /* Index into group_sect_ptr, updated by setup_group when finding a
2054 section's group. Used to optimize subsequent group searches. */
2055 unsigned int group_search_offset
;
2057 unsigned int symtab_section
, dynsymtab_section
;
2058 unsigned int dynversym_section
, dynverdef_section
, dynverref_section
;
2060 /* An identifier used to distinguish different target
2061 specific extensions to this structure. */
2062 ENUM_BITFIELD (elf_target_id
) object_id
: 6;
2064 /* Whether a dyanmic object was specified normally on the linker
2065 command line, or was specified when --as-needed was in effect,
2066 or was found via a DT_NEEDED entry. */
2067 ENUM_BITFIELD (dynamic_lib_link_class
) dyn_lib_class
: 4;
2069 /* Whether the bfd uses OS specific bits that require ELFOSABI_GNU. */
2070 ENUM_BITFIELD (elf_gnu_osabi
) has_gnu_osabi
: 4;
2072 /* Whether if the bfd contains the GNU_PROPERTY_NO_COPY_ON_PROTECTED
2074 unsigned int has_no_copy_on_protected
: 1;
2076 /* Irix 5 often screws up the symbol table, sorting local symbols
2077 after global symbols. This flag is set if the symbol table in
2078 this BFD appears to be screwed up. If it is, we ignore the
2079 sh_info field in the symbol table header, and always read all the
2081 unsigned int bad_symtab
: 1;
2083 /* Set if DT_FLAGS_1 has DF_1_PIE set. */
2084 unsigned int is_pie
: 1;
2086 /* Information grabbed from an elf core file. */
2087 struct core_elf_obj_tdata
*core
;
2089 /* More information held for output ELF BFDs. */
2090 struct output_elf_obj_tdata
*o
;
2093 #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
2095 #define elf_object_id(bfd) (elf_tdata(bfd) -> object_id)
2096 #define elf_program_header_size(bfd) (elf_tdata(bfd) -> o->program_header_size)
2097 #define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header)
2098 #define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr)
2099 #define elf_numsections(bfd) (elf_tdata(bfd) -> num_elf_sections)
2100 #define elf_seg_map(bfd) (elf_tdata(bfd) -> o->seg_map)
2101 #define elf_link_info(bfd) (elf_tdata(bfd) -> o->link_info)
2102 #define elf_next_file_pos(bfd) (elf_tdata(bfd) -> o->next_file_pos)
2103 #define elf_eh_frame_hdr(bfd) (elf_tdata(bfd) -> o->eh_frame_hdr)
2104 #define elf_stack_flags(bfd) (elf_tdata(bfd) -> o->stack_flags)
2105 #define elf_shstrtab(bfd) (elf_tdata(bfd) -> o->strtab_ptr)
2106 #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section)
2107 #define elf_symtab_shndx_list(bfd) (elf_tdata(bfd) -> symtab_shndx_list)
2108 #define elf_strtab_sec(bfd) (elf_tdata(bfd) -> o->strtab_section)
2109 #define elf_shstrtab_sec(bfd) (elf_tdata(bfd) -> o->shstrtab_section)
2110 #define elf_symtab_hdr(bfd) (elf_tdata(bfd) -> symtab_hdr)
2111 #define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section)
2112 #define elf_dynversym(bfd) (elf_tdata(bfd) -> dynversym_section)
2113 #define elf_dynverdef(bfd) (elf_tdata(bfd) -> dynverdef_section)
2114 #define elf_dynverref(bfd) (elf_tdata(bfd) -> dynverref_section)
2115 #define elf_eh_frame_section(bfd) \
2116 (elf_tdata(bfd) -> eh_frame_section)
2117 #define elf_section_syms(bfd) (elf_tdata(bfd) -> o->section_syms)
2118 #define elf_num_section_syms(bfd) (elf_tdata(bfd) -> o->num_section_syms)
2119 #define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
2120 #define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
2121 #define elf_gp(bfd) (elf_tdata(bfd) -> gp)
2122 #define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size)
2123 #define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes)
2124 #define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts)
2125 #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets)
2126 #define elf_local_got_ents(bfd) (elf_tdata(bfd) -> local_got.ents)
2127 #define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name)
2128 #define elf_dt_audit(bfd) (elf_tdata(bfd) -> dt_audit)
2129 #define elf_dyn_lib_class(bfd) (elf_tdata(bfd) -> dyn_lib_class)
2130 #define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab)
2131 #define elf_flags_init(bfd) (elf_tdata(bfd) -> o->flags_init)
2132 #define elf_known_obj_attributes(bfd) (elf_tdata (bfd) -> known_obj_attributes)
2133 #define elf_other_obj_attributes(bfd) (elf_tdata (bfd) -> other_obj_attributes)
2134 #define elf_known_obj_attributes_proc(bfd) \
2135 (elf_known_obj_attributes (bfd) [OBJ_ATTR_PROC])
2136 #define elf_other_obj_attributes_proc(bfd) \
2137 (elf_other_obj_attributes (bfd) [OBJ_ATTR_PROC])
2138 #define elf_properties(bfd) (elf_tdata (bfd) -> properties)
2139 #define elf_has_no_copy_on_protected(bfd) \
2140 (elf_tdata(bfd) -> has_no_copy_on_protected)
2142 extern void _bfd_elf_swap_verdef_in
2143 (bfd
*, const Elf_External_Verdef
*, Elf_Internal_Verdef
*);
2144 extern void _bfd_elf_swap_verdef_out
2145 (bfd
*, const Elf_Internal_Verdef
*, Elf_External_Verdef
*);
2146 extern void _bfd_elf_swap_verdaux_in
2147 (bfd
*, const Elf_External_Verdaux
*, Elf_Internal_Verdaux
*);
2148 extern void _bfd_elf_swap_verdaux_out
2149 (bfd
*, const Elf_Internal_Verdaux
*, Elf_External_Verdaux
*);
2150 extern void _bfd_elf_swap_verneed_in
2151 (bfd
*, const Elf_External_Verneed
*, Elf_Internal_Verneed
*);
2152 extern void _bfd_elf_swap_verneed_out
2153 (bfd
*, const Elf_Internal_Verneed
*, Elf_External_Verneed
*);
2154 extern void _bfd_elf_swap_vernaux_in
2155 (bfd
*, const Elf_External_Vernaux
*, Elf_Internal_Vernaux
*);
2156 extern void _bfd_elf_swap_vernaux_out
2157 (bfd
*, const Elf_Internal_Vernaux
*, Elf_External_Vernaux
*);
2158 extern void _bfd_elf_swap_versym_in
2159 (bfd
*, const Elf_External_Versym
*, Elf_Internal_Versym
*);
2160 extern void _bfd_elf_swap_versym_out
2161 (bfd
*, const Elf_Internal_Versym
*, Elf_External_Versym
*);
2163 extern unsigned int _bfd_elf_section_from_bfd_section
2164 (bfd
*, asection
*);
2165 extern char *bfd_elf_string_from_elf_section
2166 (bfd
*, unsigned, unsigned);
2167 extern Elf_Internal_Sym
*bfd_elf_get_elf_syms
2168 (bfd
*, Elf_Internal_Shdr
*, size_t, size_t, Elf_Internal_Sym
*, void *,
2169 Elf_External_Sym_Shndx
*);
2170 extern char * bfd_elf_get_str_section (bfd
*, unsigned int);
2171 extern const char *bfd_elf_sym_name
2172 (bfd
*, Elf_Internal_Shdr
*, Elf_Internal_Sym
*, asection
*);
2174 extern bool _bfd_elf_copy_private_bfd_data
2176 extern bool _bfd_elf_print_private_bfd_data
2178 const char * _bfd_elf_get_symbol_version_string
2179 (bfd
*, asymbol
*, bool, bool *);
2180 extern void bfd_elf_print_symbol
2181 (bfd
*, void *, asymbol
*, bfd_print_symbol_type
);
2183 extern unsigned int _bfd_elf_eh_frame_address_size
2184 (bfd
*, const asection
*);
2185 extern bfd_byte _bfd_elf_encode_eh_address
2186 (bfd
*abfd
, struct bfd_link_info
*info
, asection
*osec
, bfd_vma offset
,
2187 asection
*loc_sec
, bfd_vma loc_offset
, bfd_vma
*encoded
);
2188 extern bool _bfd_elf_can_make_relative
2189 (bfd
*input_bfd
, struct bfd_link_info
*info
, asection
*eh_frame_section
);
2191 extern enum elf_reloc_type_class _bfd_elf_reloc_type_class
2192 (const struct bfd_link_info
*, const asection
*,
2193 const Elf_Internal_Rela
*);
2194 extern bfd_vma _bfd_elf_rela_local_sym
2195 (bfd
*, Elf_Internal_Sym
*, asection
**, Elf_Internal_Rela
*);
2196 extern bfd_vma _bfd_elf_rel_local_sym
2197 (bfd
*, Elf_Internal_Sym
*, asection
**, bfd_vma
);
2198 extern bfd_vma _bfd_elf_section_offset
2199 (bfd
*, struct bfd_link_info
*, asection
*, bfd_vma
);
2201 extern unsigned long bfd_elf_hash
2203 extern unsigned long bfd_elf_gnu_hash
2206 extern bfd_reloc_status_type bfd_elf_generic_reloc
2207 (bfd
*, arelent
*, asymbol
*, void *, asection
*, bfd
*, char **);
2208 extern bool bfd_elf_allocate_object
2209 (bfd
*, size_t, enum elf_target_id
);
2210 extern bool bfd_elf_make_object
2212 extern bool bfd_elf_mkcorefile
2214 extern bool _bfd_elf_make_section_from_shdr
2215 (bfd
*, Elf_Internal_Shdr
*, const char *, int);
2216 extern bool _bfd_elf_make_section_from_phdr
2217 (bfd
*, Elf_Internal_Phdr
*, int, const char *);
2218 extern struct bfd_hash_entry
*_bfd_elf_link_hash_newfunc
2219 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *);
2220 extern struct bfd_link_hash_table
*_bfd_elf_link_hash_table_create
2222 extern void _bfd_elf_link_hash_table_free
2224 extern void _bfd_elf_link_hash_copy_indirect
2225 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
2226 struct elf_link_hash_entry
*);
2227 extern void _bfd_elf_link_hash_hide_symbol
2228 (struct bfd_link_info
*, struct elf_link_hash_entry
*, bool);
2229 extern void _bfd_elf_link_hide_symbol
2230 (bfd
*, struct bfd_link_info
*, struct bfd_link_hash_entry
*);
2231 extern bool _bfd_elf_link_hash_fixup_symbol
2232 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
2233 extern bool _bfd_elf_link_hash_table_init
2234 (struct elf_link_hash_table
*, bfd
*,
2235 struct bfd_hash_entry
*(*)
2236 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *),
2237 unsigned int, enum elf_target_id
);
2238 extern bool _bfd_elf_slurp_version_tables
2240 extern bool _bfd_elf_merge_sections
2241 (bfd
*, struct bfd_link_info
*);
2242 extern bool _bfd_elf_match_sections_by_type
2243 (bfd
*, const asection
*, bfd
*, const asection
*);
2244 extern bool bfd_elf_is_group_section
2245 (bfd
*, const struct bfd_section
*);
2246 extern const char *bfd_elf_group_name
2247 (bfd
*, const struct bfd_section
*);
2248 extern bool _bfd_elf_section_already_linked
2249 (bfd
*, asection
*, struct bfd_link_info
*);
2250 extern void bfd_elf_set_group_contents
2251 (bfd
*, asection
*, void *);
2252 extern unsigned int _bfd_elf_filter_global_symbols
2253 (bfd
*, struct bfd_link_info
*, asymbol
**, long);
2254 extern asection
*_bfd_elf_check_kept_section
2255 (asection
*, struct bfd_link_info
*);
2256 #define _bfd_elf_link_just_syms _bfd_generic_link_just_syms
2257 extern void _bfd_elf_copy_link_hash_symbol_type
2258 (bfd
*, struct bfd_link_hash_entry
*, struct bfd_link_hash_entry
*);
2259 extern bool _bfd_elf_size_group_sections
2260 (struct bfd_link_info
*);
2261 extern bool _bfd_elf_fixup_group_sections
2262 (bfd
*, asection
*);
2263 extern bool _bfd_elf_copy_private_header_data
2265 extern bool _bfd_elf_copy_private_symbol_data
2266 (bfd
*, asymbol
*, bfd
*, asymbol
*);
2267 #define _bfd_generic_init_private_section_data \
2268 _bfd_elf_init_private_section_data
2269 extern bool _bfd_elf_init_private_section_data
2270 (bfd
*, asection
*, bfd
*, asection
*, struct bfd_link_info
*);
2271 extern bool _bfd_elf_copy_private_section_data
2272 (bfd
*, asection
*, bfd
*, asection
*);
2273 extern bool _bfd_elf_write_object_contents
2275 extern bool _bfd_elf_write_corefile_contents
2277 extern bool _bfd_elf_set_section_contents
2278 (bfd
*, sec_ptr
, const void *, file_ptr
, bfd_size_type
);
2279 extern long _bfd_elf_get_symtab_upper_bound
2281 extern long _bfd_elf_canonicalize_symtab
2282 (bfd
*, asymbol
**);
2283 extern long _bfd_elf_get_dynamic_symtab_upper_bound
2285 extern long _bfd_elf_canonicalize_dynamic_symtab
2286 (bfd
*, asymbol
**);
2287 extern long _bfd_elf_get_synthetic_symtab
2288 (bfd
*, long, asymbol
**, long, asymbol
**, asymbol
**);
2289 extern long _bfd_elf_get_reloc_upper_bound
2291 extern long _bfd_elf_canonicalize_reloc
2292 (bfd
*, sec_ptr
, arelent
**, asymbol
**);
2293 extern asection
* _bfd_elf_get_dynamic_reloc_section
2294 (bfd
*, asection
*, bool);
2295 extern asection
* _bfd_elf_make_dynamic_reloc_section
2296 (asection
*, bfd
*, unsigned int, bfd
*, bool);
2297 extern long _bfd_elf_get_dynamic_reloc_upper_bound
2299 extern long _bfd_elf_canonicalize_dynamic_reloc
2300 (bfd
*, arelent
**, asymbol
**);
2301 extern asymbol
*_bfd_elf_make_empty_symbol
2303 extern void _bfd_elf_get_symbol_info
2304 (bfd
*, asymbol
*, symbol_info
*);
2305 extern bool _bfd_elf_is_local_label_name
2306 (bfd
*, const char *);
2307 extern alent
*_bfd_elf_get_lineno
2309 extern bool _bfd_elf_set_arch_mach
2310 (bfd
*, enum bfd_architecture
, unsigned long);
2311 extern bool _bfd_elf_find_nearest_line
2312 (bfd
*, asymbol
**, asection
*, bfd_vma
,
2313 const char **, const char **, unsigned int *, unsigned int *);
2314 extern bool _bfd_elf_find_line
2315 (bfd
*, asymbol
**, asymbol
*, const char **, unsigned int *);
2316 extern bool _bfd_elf_find_inliner_info
2317 (bfd
*, const char **, const char **, unsigned int *);
2318 extern asymbol
*_bfd_elf_find_function
2319 (bfd
*, asymbol
**, asection
*, bfd_vma
, const char **, const char **);
2320 #define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols
2321 #define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
2322 extern int _bfd_elf_sizeof_headers
2323 (bfd
*, struct bfd_link_info
*);
2324 extern bool _bfd_elf_new_section_hook
2325 (bfd
*, asection
*);
2326 extern const struct bfd_elf_special_section
*_bfd_elf_get_special_section
2327 (const char *, const struct bfd_elf_special_section
*, unsigned int);
2328 extern const struct bfd_elf_special_section
*_bfd_elf_get_sec_type_attr
2329 (bfd
*, asection
*);
2331 extern bool _bfd_elf_link_hide_sym_by_version
2332 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
2334 /* If the target doesn't have reloc handling written yet: */
2335 extern bool _bfd_elf_no_info_to_howto
2336 (bfd
*, arelent
*, Elf_Internal_Rela
*);
2338 extern bool bfd_section_from_shdr
2339 (bfd
*, unsigned int shindex
);
2340 extern bool bfd_section_from_phdr
2341 (bfd
*, Elf_Internal_Phdr
*, int);
2343 extern int _bfd_elf_symbol_from_bfd_symbol
2344 (bfd
*, asymbol
**);
2346 extern Elf_Internal_Sym
*bfd_sym_from_r_symndx
2347 (struct sym_cache
*, bfd
*, unsigned long);
2348 extern asection
*bfd_section_from_elf_index
2349 (bfd
*, unsigned int);
2351 extern struct elf_strtab_hash
* _bfd_elf_strtab_init
2353 extern void _bfd_elf_strtab_free
2354 (struct elf_strtab_hash
*);
2355 extern size_t _bfd_elf_strtab_add
2356 (struct elf_strtab_hash
*, const char *, bool);
2357 extern void _bfd_elf_strtab_addref
2358 (struct elf_strtab_hash
*, size_t);
2359 extern void _bfd_elf_strtab_delref
2360 (struct elf_strtab_hash
*, size_t);
2361 extern unsigned int _bfd_elf_strtab_refcount
2362 (struct elf_strtab_hash
*, size_t);
2363 extern void _bfd_elf_strtab_clear_all_refs
2364 (struct elf_strtab_hash
*);
2365 extern void *_bfd_elf_strtab_save
2366 (struct elf_strtab_hash
*);
2367 extern void _bfd_elf_strtab_restore
2368 (struct elf_strtab_hash
*, void *);
2369 extern bfd_size_type _bfd_elf_strtab_size
2370 (struct elf_strtab_hash
*);
2371 extern bfd_size_type _bfd_elf_strtab_len
2372 (struct elf_strtab_hash
*);
2373 extern bfd_size_type _bfd_elf_strtab_offset
2374 (struct elf_strtab_hash
*, size_t);
2375 extern const char * _bfd_elf_strtab_str
2376 (struct elf_strtab_hash
*, size_t idx
, bfd_size_type
*offset
);
2377 extern bool _bfd_elf_strtab_emit
2378 (bfd
*, struct elf_strtab_hash
*);
2379 extern void _bfd_elf_strtab_finalize
2380 (struct elf_strtab_hash
*);
2382 extern bool bfd_elf_parse_eh_frame_entries
2383 (bfd
*, struct bfd_link_info
*);
2384 extern bool _bfd_elf_parse_eh_frame_entry
2385 (struct bfd_link_info
*, asection
*, struct elf_reloc_cookie
*);
2386 extern void _bfd_elf_parse_eh_frame
2387 (bfd
*, struct bfd_link_info
*, asection
*, struct elf_reloc_cookie
*);
2388 extern bool _bfd_elf_end_eh_frame_parsing
2389 (struct bfd_link_info
*info
);
2391 extern bool _bfd_elf_discard_section_eh_frame
2392 (bfd
*, struct bfd_link_info
*, asection
*,
2393 bool (*) (bfd_vma
, void *), struct elf_reloc_cookie
*);
2394 extern bool _bfd_elf_adjust_eh_frame_global_symbol
2395 (struct elf_link_hash_entry
*, void *);
2396 extern bool _bfd_elf_discard_section_eh_frame_hdr
2397 (bfd
*, struct bfd_link_info
*);
2398 extern bfd_vma _bfd_elf_eh_frame_section_offset
2399 (bfd
*, struct bfd_link_info
*, asection
*, bfd_vma
);
2400 extern bool _bfd_elf_write_section_eh_frame
2401 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
2402 bool _bfd_elf_write_section_eh_frame_entry
2403 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
2404 extern bool _bfd_elf_fixup_eh_frame_hdr (struct bfd_link_info
*);
2405 extern bool _bfd_elf_write_section_eh_frame_hdr
2406 (bfd
*, struct bfd_link_info
*);
2407 extern bool _bfd_elf_eh_frame_present
2408 (struct bfd_link_info
*);
2409 extern bool _bfd_elf_eh_frame_entry_present
2410 (struct bfd_link_info
*);
2411 extern bool _bfd_elf_maybe_strip_eh_frame_hdr
2412 (struct bfd_link_info
*);
2414 extern bool _bfd_elf_hash_symbol (struct elf_link_hash_entry
*);
2416 extern long _bfd_elf_link_lookup_local_dynindx
2417 (struct bfd_link_info
*, bfd
*, long);
2418 extern bool _bfd_elf_compute_section_file_positions
2419 (bfd
*, struct bfd_link_info
*);
2420 extern file_ptr _bfd_elf_assign_file_position_for_section
2421 (Elf_Internal_Shdr
*, file_ptr
, bool);
2422 extern bool _bfd_elf_modify_headers
2423 (bfd
*, struct bfd_link_info
*);
2425 extern bool _bfd_elf_validate_reloc
2428 extern bool bfd_elf_record_link_assignment
2429 (bfd
*, struct bfd_link_info
*, const char *, bool,
2431 extern bool bfd_elf_stack_segment_size (bfd
*, struct bfd_link_info
*,
2432 const char *, bfd_vma
);
2433 extern bool bfd_elf_size_dynamic_sections
2434 (bfd
*, const char *, const char *, const char *, const char *, const char *,
2435 const char * const *, struct bfd_link_info
*, struct bfd_section
**);
2436 extern bool bfd_elf_size_dynsym_hash_dynstr
2437 (bfd
*, struct bfd_link_info
*);
2438 extern bool bfd_elf_get_bfd_needed_list
2439 (bfd
*, struct bfd_link_needed_list
**);
2440 extern struct bfd_link_needed_list
*bfd_elf_get_needed_list
2441 (bfd
*, struct bfd_link_info
*);
2442 extern void bfd_elf_set_dt_needed_name
2443 (bfd
*, const char *);
2444 extern const char *bfd_elf_get_dt_soname
2446 extern void bfd_elf_set_dyn_lib_class
2447 (bfd
*, enum dynamic_lib_link_class
);
2448 extern int bfd_elf_get_dyn_lib_class
2450 extern struct bfd_link_needed_list
*bfd_elf_get_runpath_list
2451 (bfd
*, struct bfd_link_info
*);
2452 extern int bfd_elf_discard_info
2453 (bfd
*, struct bfd_link_info
*);
2454 extern unsigned int _bfd_elf_default_action_discarded
2455 (struct bfd_section
*);
2456 extern struct bfd_section
*_bfd_elf_tls_setup
2457 (bfd
*, struct bfd_link_info
*);
2459 extern bool _bfd_elf_link_create_dynamic_sections
2460 (bfd
*, struct bfd_link_info
*);
2461 extern bool _bfd_elf_omit_section_dynsym_default
2462 (bfd
*, struct bfd_link_info
*, asection
*);
2463 extern bool _bfd_elf_omit_section_dynsym_all
2464 (bfd
*, struct bfd_link_info
*, asection
*);
2465 extern bool _bfd_elf_create_dynamic_sections
2466 (bfd
*, struct bfd_link_info
*);
2467 extern bool _bfd_elf_create_got_section
2468 (bfd
*, struct bfd_link_info
*);
2469 extern asection
*_bfd_elf_section_for_symbol
2470 (struct elf_reloc_cookie
*, unsigned long, bool);
2471 extern struct elf_link_hash_entry
*_bfd_elf_define_linkage_sym
2472 (bfd
*, struct bfd_link_info
*, asection
*, const char *);
2473 extern void _bfd_elf_init_1_index_section
2474 (bfd
*, struct bfd_link_info
*);
2475 extern void _bfd_elf_init_2_index_sections
2476 (bfd
*, struct bfd_link_info
*);
2478 extern bool _bfd_elfcore_make_pseudosection
2479 (bfd
*, char *, size_t, ufile_ptr
);
2480 extern char *_bfd_elfcore_strndup
2481 (bfd
*, char *, size_t);
2483 extern Elf_Internal_Rela
*_bfd_elf_link_read_relocs
2484 (bfd
*, asection
*, void *, Elf_Internal_Rela
*, bool);
2486 extern bool _bfd_elf_link_output_relocs
2487 (bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*,
2488 struct elf_link_hash_entry
**);
2490 extern bool _bfd_elf_adjust_dynamic_copy
2491 (struct bfd_link_info
*, struct elf_link_hash_entry
*, asection
*);
2493 extern bool _bfd_elf_dynamic_symbol_p
2494 (struct elf_link_hash_entry
*, struct bfd_link_info
*, bool);
2496 extern bool _bfd_elf_symbol_refs_local_p
2497 (struct elf_link_hash_entry
*, struct bfd_link_info
*, bool);
2499 extern bfd_reloc_status_type bfd_elf_perform_complex_relocation
2500 (bfd
*, asection
*, bfd_byte
*, Elf_Internal_Rela
*, bfd_vma
);
2502 extern bool _bfd_elf_setup_sections
2505 extern struct bfd_link_hash_entry
*bfd_elf_define_start_stop
2506 (struct bfd_link_info
*, const char *, asection
*);
2508 extern bool _bfd_elf_init_file_header (bfd
*, struct bfd_link_info
*);
2510 extern bool _bfd_elf_final_write_processing (bfd
*);
2512 extern bfd_cleanup bfd_elf32_object_p
2514 extern bfd_cleanup bfd_elf32_core_file_p
2516 extern char *bfd_elf32_core_file_failing_command
2518 extern int bfd_elf32_core_file_failing_signal
2520 extern bool bfd_elf32_core_file_matches_executable_p
2522 extern int bfd_elf32_core_file_pid
2524 extern bool _bfd_elf32_core_find_build_id
2527 extern bool bfd_elf32_swap_symbol_in
2528 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
2529 extern void bfd_elf32_swap_symbol_out
2530 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
2531 extern void bfd_elf32_swap_reloc_in
2532 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2533 extern void bfd_elf32_swap_reloc_out
2534 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2535 extern void bfd_elf32_swap_reloca_in
2536 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2537 extern void bfd_elf32_swap_reloca_out
2538 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2539 extern void bfd_elf32_swap_phdr_in
2540 (bfd
*, const Elf32_External_Phdr
*, Elf_Internal_Phdr
*);
2541 extern void bfd_elf32_swap_phdr_out
2542 (bfd
*, const Elf_Internal_Phdr
*, Elf32_External_Phdr
*);
2543 extern void bfd_elf32_swap_dyn_in
2544 (bfd
*, const void *, Elf_Internal_Dyn
*);
2545 extern void bfd_elf32_swap_dyn_out
2546 (bfd
*, const Elf_Internal_Dyn
*, void *);
2547 extern long bfd_elf32_slurp_symbol_table
2548 (bfd
*, asymbol
**, bool);
2549 extern bool bfd_elf32_write_shdrs_and_ehdr
2551 extern int bfd_elf32_write_out_phdrs
2552 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
2553 extern bool bfd_elf32_checksum_contents
2554 (bfd
* , void (*) (const void *, size_t, void *), void *);
2555 extern void bfd_elf32_write_relocs
2556 (bfd
*, asection
*, void *);
2557 extern bool bfd_elf32_slurp_reloc_table
2558 (bfd
*, asection
*, asymbol
**, bool);
2560 extern bfd_cleanup bfd_elf64_object_p
2562 extern bfd_cleanup bfd_elf64_core_file_p
2564 extern char *bfd_elf64_core_file_failing_command
2566 extern int bfd_elf64_core_file_failing_signal
2568 extern bool bfd_elf64_core_file_matches_executable_p
2570 extern int bfd_elf64_core_file_pid
2572 extern bool _bfd_elf64_core_find_build_id
2575 extern bool bfd_elf64_swap_symbol_in
2576 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
2577 extern void bfd_elf64_swap_symbol_out
2578 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
2579 extern void bfd_elf64_swap_reloc_in
2580 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2581 extern void bfd_elf64_swap_reloc_out
2582 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2583 extern void bfd_elf64_swap_reloca_in
2584 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2585 extern void bfd_elf64_swap_reloca_out
2586 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2587 extern void bfd_elf64_swap_phdr_in
2588 (bfd
*, const Elf64_External_Phdr
*, Elf_Internal_Phdr
*);
2589 extern void bfd_elf64_swap_phdr_out
2590 (bfd
*, const Elf_Internal_Phdr
*, Elf64_External_Phdr
*);
2591 extern void bfd_elf64_swap_dyn_in
2592 (bfd
*, const void *, Elf_Internal_Dyn
*);
2593 extern void bfd_elf64_swap_dyn_out
2594 (bfd
*, const Elf_Internal_Dyn
*, void *);
2595 extern long bfd_elf64_slurp_symbol_table
2596 (bfd
*, asymbol
**, bool);
2597 extern bool bfd_elf64_write_shdrs_and_ehdr
2599 extern int bfd_elf64_write_out_phdrs
2600 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
2601 extern bool bfd_elf64_checksum_contents
2602 (bfd
* , void (*) (const void *, size_t, void *), void *);
2603 extern void bfd_elf64_write_relocs
2604 (bfd
*, asection
*, void *);
2605 extern bool bfd_elf64_slurp_reloc_table
2606 (bfd
*, asection
*, asymbol
**, bool);
2608 extern bool _bfd_elf_default_relocs_compatible
2609 (const bfd_target
*, const bfd_target
*);
2611 extern bool _bfd_elf_relocs_compatible
2612 (const bfd_target
*, const bfd_target
*);
2613 extern bool _bfd_elf_notice_as_needed
2614 (bfd
*, struct bfd_link_info
*, enum notice_asneeded_action
);
2616 extern struct bfd_link_hash_entry
*_bfd_elf_archive_symbol_lookup
2617 (bfd
*, struct bfd_link_info
*, const char *);
2618 extern bool bfd_elf_link_add_symbols
2619 (bfd
*, struct bfd_link_info
*);
2620 extern bool _bfd_elf_add_dynamic_entry
2621 (struct bfd_link_info
*, bfd_vma
, bfd_vma
);
2622 extern bool _bfd_elf_strip_zero_sized_dynamic_sections
2623 (struct bfd_link_info
*);
2624 extern int bfd_elf_add_dt_needed_tag
2625 (bfd
*, struct bfd_link_info
*);
2626 extern bool _bfd_elf_link_check_relocs
2627 (bfd
*, struct bfd_link_info
*);
2629 extern bool bfd_elf_link_record_dynamic_symbol
2630 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
2632 extern int bfd_elf_link_record_local_dynamic_symbol
2633 (struct bfd_link_info
*, bfd
*, long);
2635 extern bool _bfd_elf_close_and_cleanup
2638 extern bool _bfd_elf_common_definition
2639 (Elf_Internal_Sym
*);
2641 extern unsigned int _bfd_elf_common_section_index
2644 extern asection
*_bfd_elf_common_section
2647 extern bfd_vma _bfd_elf_default_got_elt_size
2648 (bfd
*, struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd
*,
2651 extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn
2652 (bfd
*, arelent
*, struct bfd_symbol
*, void *,
2653 asection
*, bfd
*, char **);
2655 extern bool bfd_elf_final_link
2656 (bfd
*, struct bfd_link_info
*);
2658 extern void _bfd_elf_gc_keep
2659 (struct bfd_link_info
*info
);
2661 extern bool bfd_elf_gc_mark_dynamic_ref_symbol
2662 (struct elf_link_hash_entry
*h
, void *inf
);
2664 extern bool bfd_elf_gc_sections
2665 (bfd
*, struct bfd_link_info
*);
2667 extern bool bfd_elf_gc_record_vtinherit
2668 (bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
);
2670 extern bool bfd_elf_gc_record_vtentry
2671 (bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
);
2673 extern asection
*_bfd_elf_gc_mark_hook
2674 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
2675 struct elf_link_hash_entry
*, Elf_Internal_Sym
*);
2677 extern asection
*_bfd_elf_gc_mark_rsec
2678 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
,
2679 struct elf_reloc_cookie
*, bool *);
2681 extern bool _bfd_elf_gc_mark_reloc
2682 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
,
2683 struct elf_reloc_cookie
*);
2685 extern bool _bfd_elf_gc_mark_fdes
2686 (struct bfd_link_info
*, asection
*, asection
*, elf_gc_mark_hook_fn
,
2687 struct elf_reloc_cookie
*);
2689 extern bool _bfd_elf_gc_mark
2690 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
);
2692 extern bool _bfd_elf_gc_mark_extra_sections
2693 (struct bfd_link_info
*, elf_gc_mark_hook_fn
);
2695 extern bool bfd_elf_gc_common_finalize_got_offsets
2696 (bfd
*, struct bfd_link_info
*);
2698 extern bool bfd_elf_gc_common_final_link
2699 (bfd
*, struct bfd_link_info
*);
2701 extern bool bfd_elf_reloc_symbol_deleted_p
2704 extern struct elf_segment_map
* _bfd_elf_make_dynamic_segment
2705 (bfd
*, asection
*);
2707 extern bool _bfd_elf_map_sections_to_segments
2708 (bfd
*, struct bfd_link_info
*);
2710 extern bool _bfd_elf_is_function_type (unsigned int);
2712 extern bfd_size_type
_bfd_elf_maybe_function_sym (const asymbol
*, asection
*,
2715 extern asection
*_bfd_elf_plt_get_reloc_section (bfd
*, const char *);
2717 extern int bfd_elf_get_default_section_type (flagword
);
2719 extern bool bfd_elf_lookup_section_flags
2720 (struct bfd_link_info
*, struct flag_info
*, asection
*);
2722 extern Elf_Internal_Phdr
* _bfd_elf_find_segment_containing_section
2723 (bfd
* abfd
, asection
* section
);
2725 /* PowerPC @tls opcode transform/validate. */
2726 extern unsigned int _bfd_elf_ppc_at_tls_transform
2727 (unsigned int, unsigned int);
2728 /* PowerPC @tprel opcode transform/validate. */
2729 extern unsigned int _bfd_elf_ppc_at_tprel_transform
2730 (unsigned int, unsigned int);
2731 /* PowerPC elf_object_p tweak. */
2732 extern bool _bfd_elf_ppc_set_arch (bfd
*);
2733 /* PowerPC .gnu.attributes handling common to both 32-bit and 64-bit. */
2734 extern bool _bfd_elf_ppc_merge_fp_attributes
2735 (bfd
*, struct bfd_link_info
*);
2737 /* Return an upper bound on the number of bytes required to store a
2738 copy of ABFD's program header table entries. Return -1 if an error
2739 occurs; bfd_get_error will return an appropriate code. */
2740 extern long bfd_get_elf_phdr_upper_bound
2743 /* Copy ABFD's program header table entries to *PHDRS. The entries
2744 will be stored as an array of Elf_Internal_Phdr structures, as
2745 defined in include/elf/internal.h. To find out how large the
2746 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
2748 Return the number of program header table entries read, or -1 if an
2749 error occurs; bfd_get_error will return an appropriate code. */
2750 extern int bfd_get_elf_phdrs
2751 (bfd
*abfd
, void *phdrs
);
2753 /* Exported interface for writing elf corefile notes. */
2754 extern char *elfcore_write_note
2755 (bfd
*, char *, int *, const char *, int, const void *, int);
2756 extern char *elfcore_write_prpsinfo
2757 (bfd
*, char *, int *, const char *, const char *);
2758 extern char *elfcore_write_prstatus
2759 (bfd
*, char *, int *, long, int, const void *);
2760 extern char * elfcore_write_pstatus
2761 (bfd
*, char *, int *, long, int, const void *);
2762 extern char *elfcore_write_prfpreg
2763 (bfd
*, char *, int *, const void *, int);
2764 extern char *elfcore_write_prxfpreg
2765 (bfd
*, char *, int *, const void *, int);
2766 extern char *elfcore_write_xstatereg
2767 (bfd
*, char *, int *, const void *, int);
2768 extern char *elfcore_write_ppc_vmx
2769 (bfd
*, char *, int *, const void *, int);
2770 extern char *elfcore_write_ppc_vsx
2771 (bfd
*, char *, int *, const void *, int);
2772 extern char *elfcore_write_ppc_tar
2773 (bfd
*, char *, int *, const void *, int);
2774 extern char *elfcore_write_ppc_ppr
2775 (bfd
*, char *, int *, const void *, int);
2776 extern char *elfcore_write_ppc_dscr
2777 (bfd
*, char *, int *, const void *, int);
2778 extern char *elfcore_write_ppc_ebb
2779 (bfd
*, char *, int *, const void *, int);
2780 extern char *elfcore_write_ppc_pmu
2781 (bfd
*, char *, int *, const void *, int);
2782 extern char *elfcore_write_ppc_tm_cgpr
2783 (bfd
*, char *, int *, const void *, int);
2784 extern char *elfcore_write_ppc_tm_cfpr
2785 (bfd
*, char *, int *, const void *, int);
2786 extern char *elfcore_write_ppc_tm_cvmx
2787 (bfd
*, char *, int *, const void *, int);
2788 extern char *elfcore_write_ppc_tm_cvsx
2789 (bfd
*, char *, int *, const void *, int);
2790 extern char *elfcore_write_ppc_tm_spr
2791 (bfd
*, char *, int *, const void *, int);
2792 extern char *elfcore_write_ppc_tm_ctar
2793 (bfd
*, char *, int *, const void *, int);
2794 extern char *elfcore_write_ppc_tm_cppr
2795 (bfd
*, char *, int *, const void *, int);
2796 extern char *elfcore_write_ppc_tm_cdscr
2797 (bfd
*, char *, int *, const void *, int);
2798 extern char *elfcore_write_s390_timer
2799 (bfd
*, char *, int *, const void *, int);
2800 extern char *elfcore_write_s390_todcmp
2801 (bfd
*, char *, int *, const void *, int);
2802 extern char *elfcore_write_s390_todpreg
2803 (bfd
*, char *, int *, const void *, int);
2804 extern char *elfcore_write_s390_ctrs
2805 (bfd
*, char *, int *, const void *, int);
2806 extern char *elfcore_write_s390_prefix
2807 (bfd
*, char *, int *, const void *, int);
2808 extern char *elfcore_write_s390_last_break
2809 (bfd
*, char *, int *, const void *, int);
2810 extern char *elfcore_write_s390_system_call
2811 (bfd
*, char *, int *, const void *, int);
2812 extern char *elfcore_write_s390_tdb
2813 (bfd
*, char *, int *, const void *, int);
2814 extern char *elfcore_write_s390_vxrs_low
2815 (bfd
*, char *, int *, const void *, int);
2816 extern char *elfcore_write_s390_vxrs_high
2817 (bfd
*, char *, int *, const void *, int);
2818 extern char *elfcore_write_s390_gs_cb
2819 (bfd
*, char *, int *, const void *, int);
2820 extern char *elfcore_write_s390_gs_bc
2821 (bfd
*, char *, int *, const void *, int);
2822 extern char *elfcore_write_arm_vfp
2823 (bfd
*, char *, int *, const void *, int);
2824 extern char *elfcore_write_aarch_tls
2825 (bfd
*, char *, int *, const void *, int);
2826 extern char *elfcore_write_aarch_hw_break
2827 (bfd
*, char *, int *, const void *, int);
2828 extern char *elfcore_write_aarch_hw_watch
2829 (bfd
*, char *, int *, const void *, int);
2830 extern char *elfcore_write_aarch_sve
2831 (bfd
*, char *, int *, const void *, int);
2832 extern char *elfcore_write_aarch_pauth
2833 (bfd
*, char *, int *, const void *, int);
2834 extern char *elfcore_write_aarch_mte
2835 (bfd
*, char *, int *, const void *, int);
2836 extern char *elfcore_write_arc_v2
2837 (bfd
*, char *, int *, const void *, int);
2838 extern char *elfcore_write_riscv_csr
2839 (bfd
*, char *, int *, const void *, int);
2840 extern char *elfcore_write_gdb_tdesc
2841 (bfd
*, char *, int *, const void *, int);
2842 extern char *elfcore_write_lwpstatus
2843 (bfd
*, char *, int *, long, int, const void *);
2844 extern char *elfcore_write_register_note
2845 (bfd
*, char *, int *, const char *, const void *, int);
2846 extern char *elfcore_write_file_note
2847 (bfd
*, char *, int *, const void*, int);
2849 /* Internal structure which holds information to be included in the
2850 PRPSINFO section of Linux core files.
2852 This is an "internal" structure in the sense that it should be used
2853 to pass information to BFD (via the `elfcore_write_linux_prpsinfo'
2854 function), so things like endianess shouldn't be an issue. This
2855 structure will eventually be converted in one of the
2856 `elf_external_linux_*' structures and written out to an output bfd
2857 by one of the functions declared below. */
2859 struct elf_internal_linux_prpsinfo
2861 char pr_state
; /* Numeric process state. */
2862 char pr_sname
; /* Char for pr_state. */
2863 char pr_zomb
; /* Zombie. */
2864 char pr_nice
; /* Nice val. */
2865 unsigned long pr_flag
; /* Flags. */
2866 unsigned int pr_uid
;
2867 unsigned int pr_gid
;
2868 int pr_pid
, pr_ppid
, pr_pgrp
, pr_sid
;
2869 char pr_fname
[16 + 1]; /* Filename of executable. */
2870 char pr_psargs
[80 + 1]; /* Initial part of arg list. */
2873 /* Linux/most 32-bit archs. */
2874 extern char *elfcore_write_linux_prpsinfo32
2875 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
2877 /* Linux/most 64-bit archs. */
2878 extern char *elfcore_write_linux_prpsinfo64
2879 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
2881 extern bfd
*_bfd_elf32_bfd_from_remote_memory
2882 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
2883 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, bfd_size_type
));
2884 extern bfd
*_bfd_elf64_bfd_from_remote_memory
2885 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
2886 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, bfd_size_type
));
2888 extern bfd_vma
bfd_elf_obj_attr_size (bfd
*);
2889 extern void bfd_elf_set_obj_attr_contents (bfd
*, bfd_byte
*, bfd_vma
);
2890 extern int bfd_elf_get_obj_attr_int (bfd
*, int, unsigned int);
2891 extern void bfd_elf_add_obj_attr_int (bfd
*, int, unsigned int, unsigned int);
2892 #define bfd_elf_add_proc_attr_int(BFD, TAG, VALUE) \
2893 bfd_elf_add_obj_attr_int ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2894 extern void bfd_elf_add_obj_attr_string (bfd
*, int, unsigned int, const char *);
2895 #define bfd_elf_add_proc_attr_string(BFD, TAG, VALUE) \
2896 bfd_elf_add_obj_attr_string ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2897 extern void bfd_elf_add_obj_attr_int_string (bfd
*, int, unsigned int,
2898 unsigned int, const char *);
2899 #define bfd_elf_add_proc_attr_int_string(BFD, TAG, INTVAL, STRVAL) \
2900 bfd_elf_add_obj_attr_int_string ((BFD), OBJ_ATTR_PROC, (TAG), \
2903 extern char *_bfd_elf_attr_strdup (bfd
*, const char *);
2904 extern void _bfd_elf_copy_obj_attributes (bfd
*, bfd
*);
2905 extern int _bfd_elf_obj_attrs_arg_type (bfd
*, int, unsigned int);
2906 extern void _bfd_elf_parse_attributes (bfd
*, Elf_Internal_Shdr
*);
2907 extern bool _bfd_elf_merge_object_attributes
2908 (bfd
*, struct bfd_link_info
*);
2909 extern bool _bfd_elf_merge_unknown_attribute_low (bfd
*, bfd
*, int);
2910 extern bool _bfd_elf_merge_unknown_attribute_list (bfd
*, bfd
*);
2911 extern Elf_Internal_Shdr
*_bfd_elf_single_rel_hdr (asection
*sec
);
2912 extern bool elf_read_notes (bfd
*, file_ptr
, bfd_size_type
, size_t);
2914 extern bool _bfd_elf_parse_gnu_properties
2915 (bfd
*, Elf_Internal_Note
*);
2916 extern elf_property
* _bfd_elf_get_property
2917 (bfd
*, unsigned int, unsigned int);
2918 extern bfd
*_bfd_elf_link_setup_gnu_properties
2919 (struct bfd_link_info
*);
2920 extern bfd_size_type _bfd_elf_convert_gnu_property_size
2922 extern bool _bfd_elf_convert_gnu_properties
2923 (bfd
*, asection
*, bfd
*, bfd_byte
**, bfd_size_type
*);
2925 /* The linker may need to keep track of the number of relocs that it
2926 decides to copy as dynamic relocs in check_relocs for each symbol.
2927 This is so that it can later discard them if they are found to be
2928 unnecessary. We can store the information in a field extending the
2929 regular ELF linker hash table. */
2931 struct elf_dyn_relocs
2933 struct elf_dyn_relocs
*next
;
2935 /* The input section of the reloc. */
2938 /* Total number of relocs copied for the input section. */
2939 bfd_size_type count
;
2941 /* Number of pc-relative relocs copied for the input section. */
2942 bfd_size_type pc_count
;
2945 extern bool _bfd_elf_create_ifunc_sections
2946 (bfd
*, struct bfd_link_info
*);
2947 extern bool _bfd_elf_allocate_ifunc_dyn_relocs
2948 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
2949 struct elf_dyn_relocs
**, unsigned int, unsigned int,
2950 unsigned int, bool);
2952 extern void elf_append_rela (bfd
*, asection
*, Elf_Internal_Rela
*);
2953 extern void elf_append_rel (bfd
*, asection
*, Elf_Internal_Rela
*);
2955 extern bfd_vma
elf64_r_info (bfd_vma
, bfd_vma
);
2956 extern bfd_vma
elf64_r_sym (bfd_vma
);
2957 extern bfd_vma
elf32_r_info (bfd_vma
, bfd_vma
);
2958 extern bfd_vma
elf32_r_sym (bfd_vma
);
2960 extern bool is_debuginfo_file (bfd
*);
2963 extern bool _bfd_elf_init_secondary_reloc_section
2964 (bfd
*, Elf_Internal_Shdr
*, const char *, unsigned int);
2965 extern bool _bfd_elf_slurp_secondary_reloc_section
2966 (bfd
*, asection
*, asymbol
**, bool);
2967 extern bool _bfd_elf_copy_special_section_fields
2968 (const bfd
*, bfd
*, const Elf_Internal_Shdr
*, Elf_Internal_Shdr
*);
2969 extern bool _bfd_elf_write_secondary_reloc_section
2970 (bfd
*, asection
*);
2971 extern unsigned int _bfd_elf_symbol_section_index
2972 (bfd
*, elf_symbol_type
*);
2974 extern asection
*_bfd_elf_readonly_dynrelocs
2975 (struct elf_link_hash_entry
*);
2976 extern bool _bfd_elf_maybe_set_textrel
2977 (struct elf_link_hash_entry
*, void *);
2979 extern bool _bfd_elf_add_dynamic_tags
2980 (bfd
*, struct bfd_link_info
*, bool);
2982 /* Large common section. */
2983 extern asection _bfd_elf_large_com_section
;
2985 /* Hash for local symbol with the first section id, ID, in the input
2986 file and the local symbol index, SYM. */
2987 #define ELF_LOCAL_SYMBOL_HASH(ID, SYM) \
2988 (((((ID) & 0xffU) << 24) | (((ID) & 0xff00) << 8)) \
2989 ^ (SYM) ^ (((ID) & 0xffff0000U) >> 16))
2991 /* This is the condition under which finish_dynamic_symbol will be called.
2992 If our finish_dynamic_symbol isn't called, we'll need to do something
2993 about initializing any .plt and .got entries in relocate_section. */
2994 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
2996 && ((SHARED) || !(H)->forced_local) \
2997 && ((H)->dynindx != -1 || (H)->forced_local))
2999 /* This macro is to avoid lots of duplicated code in the body
3000 of xxx_relocate_section() in the various elfxx-xxxx.c files. */
3001 #define RELOC_FOR_GLOBAL_SYMBOL(info, input_bfd, input_section, rel, \
3002 r_symndx, symtab_hdr, sym_hashes, \
3003 h, sec, relocation, \
3004 unresolved_reloc, warned, ignored) \
3007 /* It seems this can happen with erroneous or unsupported \
3008 input (mixing a.out and elf in an archive, for example.) */ \
3009 if (sym_hashes == NULL) \
3012 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; \
3014 if (info->wrap_hash != NULL \
3015 && (input_section->flags & SEC_DEBUGGING) != 0) \
3016 h = ((struct elf_link_hash_entry *) \
3017 unwrap_hash_lookup (info, input_bfd, &h->root)); \
3019 while (h->root.type == bfd_link_hash_indirect \
3020 || h->root.type == bfd_link_hash_warning) \
3021 h = (struct elf_link_hash_entry *) h->root.u.i.link; \
3025 unresolved_reloc = false; \
3027 if (h->root.type == bfd_link_hash_defined \
3028 || h->root.type == bfd_link_hash_defweak) \
3030 sec = h->root.u.def.section; \
3032 || sec->output_section == NULL) \
3033 /* Set a flag that will be cleared later if we find a \
3034 relocation value for this symbol. output_section \
3035 is typically NULL for symbols satisfied by a shared \
3037 unresolved_reloc = true; \
3039 relocation = (h->root.u.def.value \
3040 + sec->output_section->vma \
3041 + sec->output_offset); \
3043 else if (h->root.type == bfd_link_hash_undefweak) \
3045 else if (info->unresolved_syms_in_objects == RM_IGNORE \
3046 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) \
3048 else if (!bfd_link_relocatable (info)) \
3050 bool err = ((info->unresolved_syms_in_objects == RM_DIAGNOSE \
3051 && !info->warn_unresolved_syms) \
3052 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT); \
3053 (*info->callbacks->undefined_symbol) (info, \
3054 h->root.root.string, \
3057 rel->r_offset, err); \
3060 (void) unresolved_reloc; \
3066 /* This macro is to avoid lots of duplicated code in the body of the
3067 loop over relocations in xxx_relocate_section() in the various
3070 Handle relocations against symbols from removed linkonce sections,
3071 or sections discarded by a linker script. When doing a relocatable
3072 link, we remove such relocations. Otherwise, we just want the
3073 section contents zeroed and avoid any special processing. */
3074 #define RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
3075 rel, count, relend, \
3076 howto, index, contents) \
3079 _bfd_clear_contents (howto, input_bfd, input_section, \
3080 contents, rel[index].r_offset); \
3082 if (bfd_link_relocatable (info) \
3083 && (input_section->flags & SEC_DEBUGGING)) \
3085 /* Only remove relocations in debug sections since other \
3086 sections may require relocations. */ \
3087 Elf_Internal_Shdr *rel_hdr; \
3089 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
3091 /* Avoid empty output section. */ \
3092 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
3094 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
3095 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
3096 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
3098 memmove (rel, rel + count, \
3099 (relend - rel - count) * sizeof (*rel)); \
3101 input_section->reloc_count -= count; \
3108 for (i_ = 0; i_ < count; i_++) \
3110 rel[i_].r_info = 0; \
3111 rel[i_].r_addend = 0; \
3117 /* Will a symbol be bound to the definition within the shared
3118 library, if any. A unique symbol can never be bound locally. */
3119 #define SYMBOLIC_BIND(INFO, H) \
3120 (!(H)->unique_global \
3121 && ((INFO)->symbolic \
3122 || (H)->start_stop \
3123 || ((INFO)->dynamic && !(H)->dynamic)))
3125 /* Determine if a section contains CTF data, using its name. */
3127 bfd_section_is_ctf (const asection
*sec
)
3129 const char *name
= bfd_section_name (sec
);
3130 return startswith (name
, ".ctf") && (name
[4] == 0 || name
[4] == '.');
3136 #endif /* _LIBELF_H_ */