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,
538 struct elf_sym_strtab
540 Elf_Internal_Sym sym
;
541 unsigned long dest_index
;
544 struct bfd_link_needed_list
546 struct bfd_link_needed_list
*next
;
554 is_solaris
, /* Solaris. */
555 is_vxworks
, /* VxWorks. */
556 is_nacl
/* Native Client. */
559 /* Used by bfd_sym_from_r_symndx to cache a small number of local
561 #define LOCAL_SYM_CACHE_SIZE 32
565 unsigned long indx
[LOCAL_SYM_CACHE_SIZE
];
566 Elf_Internal_Sym sym
[LOCAL_SYM_CACHE_SIZE
];
569 /* ELF linker hash table. */
571 struct elf_link_hash_table
573 struct bfd_link_hash_table root
;
575 /* An identifier used to distinguish different target
576 specific extensions to this structure. */
577 enum elf_target_id hash_table_id
;
579 /* Whether we have created the special dynamic sections required
580 when linking against or generating a shared object. */
581 bool dynamic_sections_created
;
583 /* Whether dynamic relocations are present. */
586 /* True if this target has relocatable executables, so needs dynamic
588 bool is_relocatable_executable
;
590 /* TRUE if there are IFUNC resolvers. */
591 bool ifunc_resolvers
;
593 /* TRUE if DT_PLTGOT is a required dynamic tag. */
594 bool dt_pltgot_required
;
596 /* TRUE if DT_JMPREL is a required dynamic tag. */
597 bool dt_jmprel_required
;
599 /* The BFD used to hold special sections created by the linker.
600 This will be the first BFD found which requires these sections to
604 /* The value to use when initialising got.refcount/offset and
605 plt.refcount/offset in an elf_link_hash_entry. Set to zero when
606 the values are refcounts. Set to init_got_offset/init_plt_offset
607 in size_dynamic_sections when the values may be offsets. */
608 union gotplt_union init_got_refcount
;
609 union gotplt_union init_plt_refcount
;
611 /* The value to use for got.refcount/offset and plt.refcount/offset
612 when the values may be offsets. Normally (bfd_vma) -1. */
613 union gotplt_union init_got_offset
;
614 union gotplt_union init_plt_offset
;
616 /* The number of symbols found in the link which is intended for the
617 mandatory DT_SYMTAB tag (.dynsym section) in .dynamic section. */
618 bfd_size_type dynsymcount
;
619 bfd_size_type local_dynsymcount
;
621 /* The string table of dynamic symbols, which becomes the .dynstr
623 struct elf_strtab_hash
*dynstr
;
625 /* The array size of the symbol string table, which becomes the
627 bfd_size_type strtabsize
;
629 /* The array of strings, which becomes the .strtab section. */
630 struct elf_sym_strtab
*strtab
;
632 /* The number of buckets in the hash table in the .hash section.
633 This is based on the number of dynamic symbols. */
634 bfd_size_type bucketcount
;
636 /* A linked list of DT_NEEDED names found in dynamic objects
637 included in the link. */
638 struct bfd_link_needed_list
*needed
;
640 /* Sections in the output bfd that provides a section symbol
641 to be used by relocations emitted against local symbols.
642 Most targets will not use data_index_section. */
643 asection
*text_index_section
;
644 asection
*data_index_section
;
646 /* The _GLOBAL_OFFSET_TABLE_ symbol. */
647 struct elf_link_hash_entry
*hgot
;
649 /* The _PROCEDURE_LINKAGE_TABLE_ symbol. */
650 struct elf_link_hash_entry
*hplt
;
652 /* The _DYNAMIC symbol. */
653 struct elf_link_hash_entry
*hdynamic
;
655 /* A pointer to information used to merge SEC_MERGE sections. */
658 /* Used to link stabs in sections. */
659 struct stab_info stab_info
;
661 /* Used by eh_frame code when editing .eh_frame. */
662 struct eh_frame_hdr_info eh_info
;
664 /* A linked list of local symbols to be added to .dynsym. */
665 struct elf_link_local_dynamic_entry
*dynlocal
;
667 /* A linked list of DT_RPATH/DT_RUNPATH names found in dynamic
668 objects included in the link. */
669 struct bfd_link_needed_list
*runpath
;
671 /* Cached first output tls section and size of PT_TLS segment. */
673 bfd_size_type tls_size
; /* Bytes. */
675 /* The offset into splt of the PLT entry for the TLS descriptor
676 resolver. Special values are 0, if not necessary (or not found
677 to be necessary yet), and -1 if needed but not determined
681 /* The GOT offset for the lazy trampoline. Communicated to the
682 loader via DT_TLSDESC_GOT. The magic value (bfd_vma) -1
683 indicates an offset is not allocated. */
686 /* Target OS for linker output. */
687 enum elf_target_os target_os
;
689 /* A linked list of dynamic BFD's loaded in the link. */
690 struct elf_link_loaded_list
*dyn_loaded
;
692 /* Small local sym cache. */
693 struct sym_cache sym_cache
;
695 /* Short-cuts to get to dynamic linker sections. */
704 asection
*sreldynrelro
;
712 /* Returns TRUE if the hash table is a struct elf_link_hash_table. */
715 is_elf_hash_table (const struct bfd_link_hash_table
*htab
)
717 return htab
->type
== bfd_link_elf_hash_table
;
720 /* Look up an entry in an ELF linker hash table. */
722 static inline struct elf_link_hash_entry
*
723 elf_link_hash_lookup (struct elf_link_hash_table
*table
, const char *string
,
724 bool create
, bool copy
, bool follow
)
726 if (ENABLE_CHECKING
&& !is_elf_hash_table (&table
->root
))
728 return (struct elf_link_hash_entry
*)
729 bfd_link_hash_lookup (&table
->root
, string
, create
, copy
, follow
);
732 /* Traverse an ELF linker hash table. */
735 elf_link_hash_traverse (struct elf_link_hash_table
*table
,
736 bool (*f
) (struct elf_link_hash_entry
*, void *),
739 if (ENABLE_CHECKING
&& !is_elf_hash_table (&table
->root
))
741 bfd_link_hash_traverse (&table
->root
,
742 (bool (*) (struct bfd_link_hash_entry
*, void *)) f
,
746 /* Get the ELF linker hash table from a link_info structure. */
748 static inline struct elf_link_hash_table
*
749 elf_hash_table (const struct bfd_link_info
*info
)
751 return (struct elf_link_hash_table
*) info
->hash
;
754 static inline enum elf_target_id
755 elf_hash_table_id (const struct elf_link_hash_table
*table
)
757 return table
->hash_table_id
;
760 /* Constant information held for an ELF backend. */
762 struct elf_size_info
{
763 unsigned char sizeof_ehdr
, sizeof_phdr
, sizeof_shdr
;
764 unsigned char sizeof_rel
, sizeof_rela
, sizeof_sym
, sizeof_dyn
, sizeof_note
;
766 /* The size of entries in the .hash section. */
767 unsigned char sizeof_hash_entry
;
769 /* The number of internal relocations to allocate per external
771 unsigned char int_rels_per_ext_rel
;
772 /* We use some fixed size arrays. This should be large enough to
773 handle all back-ends. */
774 #define MAX_INT_RELS_PER_EXT_REL 3
776 unsigned char arch_size
, log_file_align
;
777 unsigned char elfclass
, ev_current
;
778 int (*write_out_phdrs
)
779 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
780 bool (*write_shdrs_and_ehdr
) (bfd
*);
781 bool (*checksum_contents
)
782 (bfd
* , void (*) (const void *, size_t, void *), void *);
784 (bfd
*, asection
*, void *);
785 bool (*swap_symbol_in
)
786 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
787 void (*swap_symbol_out
)
788 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
789 bool (*slurp_reloc_table
)
790 (bfd
*, asection
*, asymbol
**, bool);
791 long (*slurp_symbol_table
)
792 (bfd
*, asymbol
**, bool);
794 (bfd
*, const void *, Elf_Internal_Dyn
*);
796 (bfd
*, const Elf_Internal_Dyn
*, void *);
798 /* This function is called to swap in a REL relocation. If an
799 external relocation corresponds to more than one internal
800 relocation, then all relocations are swapped in at once. */
801 void (*swap_reloc_in
)
802 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
804 /* This function is called to swap out a REL relocation. */
805 void (*swap_reloc_out
)
806 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
808 /* This function is called to swap in a RELA relocation. If an
809 external relocation corresponds to more than one internal
810 relocation, then all relocations are swapped in at once. */
811 void (*swap_reloca_in
)
812 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
814 /* This function is called to swap out a RELA relocation. */
815 void (*swap_reloca_out
)
816 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
819 #define elf_symbol_from(S) \
820 ((((S)->flags & BSF_SYNTHETIC) == 0 \
821 && (S)->the_bfd != NULL \
822 && (S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \
823 && (S)->the_bfd->tdata.elf_obj_data != 0) \
824 ? (elf_symbol_type *) (S) \
827 enum elf_reloc_type_class
{
829 reloc_class_relative
,
835 struct elf_reloc_cookie
837 Elf_Internal_Rela
*rels
, *rel
, *relend
;
838 Elf_Internal_Sym
*locsyms
;
842 struct elf_link_hash_entry
**sym_hashes
;
847 /* The level of IRIX compatibility we're striving for. */
855 /* Mapping of ELF section names and types. */
856 struct bfd_elf_special_section
859 unsigned int prefix_length
;
860 /* 0 means name must match PREFIX exactly.
861 -1 means name must start with PREFIX followed by an arbitrary string.
862 -2 means name must match PREFIX exactly or consist of PREFIX followed
863 by a dot then anything.
864 > 0 means name must start with the first PREFIX_LENGTH chars of
865 PREFIX and finish with the last SUFFIX_LENGTH chars of PREFIX. */
866 signed int suffix_length
;
871 enum action_discarded
877 typedef asection
* (*elf_gc_mark_hook_fn
)
878 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
879 struct elf_link_hash_entry
*, Elf_Internal_Sym
*);
881 enum elf_property_kind
883 /* A new property. */
884 property_unknown
= 0,
885 /* A property ignored by backend. */
887 /* A corrupt property reported by backend. */
889 /* A property should be removed due to property merge. */
891 /* A property which is a number. */
895 typedef struct elf_property
897 unsigned int pr_type
;
898 unsigned int pr_datasz
;
901 /* For property_number, this is a number. */
903 /* Add a new one if elf_property_kind is updated. */
905 enum elf_property_kind pr_kind
;
908 typedef struct elf_property_list
910 struct elf_property_list
*next
;
911 struct elf_property property
;
914 struct bfd_elf_section_reloc_data
;
916 struct elf_backend_data
918 /* The architecture for this backend. */
919 enum bfd_architecture arch
;
921 /* An identifier used to distinguish different target specific
922 extensions to elf_obj_tdata and elf_link_hash_table structures. */
923 enum elf_target_id target_id
;
926 enum elf_target_os target_os
;
928 /* The ELF machine code (EM_xxxx) for this backend. */
929 int elf_machine_code
;
934 /* The maximum page size for this backend. */
937 /* The minimum page size for this backend. An input object will not be
938 considered page aligned unless its sections are correctly aligned for
939 pages at least this large. May be smaller than maxpagesize. */
942 /* The common page size for this backend. */
943 bfd_vma commonpagesize
;
945 /* The value of commonpagesize to use when -z relro for this backend. */
946 bfd_vma relropagesize
;
948 /* The BFD flags applied to sections created for dynamic linking. */
949 flagword dynamic_sec_flags
;
951 /* Architecture-specific data for this backend.
952 This is actually a pointer to some type like struct elf_ARCH_data. */
953 const void *arch_data
;
955 /* A function to translate an ELF RELA relocation to a BFD arelent
956 structure. Returns TRUE upon success, FALSE otherwise. */
957 bool (*elf_info_to_howto
)
958 (bfd
*, arelent
*, Elf_Internal_Rela
*);
960 /* A function to translate an ELF REL relocation to a BFD arelent
961 structure. Returns TRUE upon success, FALSE otherwise. */
962 bool (*elf_info_to_howto_rel
)
963 (bfd
*, arelent
*, Elf_Internal_Rela
*);
965 /* A function to determine whether a symbol is global when
966 partitioning the symbol table into local and global symbols.
967 This should be NULL for most targets, in which case the correct
968 thing will be done. MIPS ELF, at least on the Irix 5, has
969 special requirements. */
970 bool (*elf_backend_sym_is_global
)
973 /* The remaining functions are hooks which are called only if they
976 /* A function to permit a backend specific check on whether a
977 particular BFD format is relevant for an object file, and to
978 permit the backend to set any global information it wishes. When
979 this is called elf_elfheader is set, but anything else should be
980 used with caution. If this returns FALSE, the check_format
981 routine will return a bfd_error_wrong_format error. */
982 bool (*elf_backend_object_p
)
985 /* A function to do additional symbol processing when reading the
986 ELF symbol table. This is where any processor-specific special
987 section indices are handled. */
988 void (*elf_backend_symbol_processing
)
991 /* A function to do additional symbol processing after reading the
992 entire ELF symbol table. */
993 bool (*elf_backend_symbol_table_processing
)
994 (bfd
*, elf_symbol_type
*, unsigned int);
996 /* A function to set the type of the info field. Processor-specific
997 types should be handled here. */
998 int (*elf_backend_get_symbol_type
)
999 (Elf_Internal_Sym
*, int);
1001 /* A function to return the linker hash table entry of a symbol that
1002 might be satisfied by an archive symbol. */
1003 struct bfd_link_hash_entry
* (*elf_backend_archive_symbol_lookup
)
1004 (bfd
*, struct bfd_link_info
*, const char *);
1006 /* Return true if local section symbols should have a non-null st_name.
1007 NULL implies false. */
1008 bool (*elf_backend_name_local_section_symbols
)
1011 /* A function to do additional processing on the ELF section header
1012 just before writing it out. This is used to set the flags and
1013 type fields for some sections, or to actually write out data for
1014 unusual sections. */
1015 bool (*elf_backend_section_processing
)
1016 (bfd
*, Elf_Internal_Shdr
*);
1018 /* A function to handle unusual section types when creating BFD
1019 sections from ELF sections. */
1020 bool (*elf_backend_section_from_shdr
)
1021 (bfd
*, Elf_Internal_Shdr
*, const char *, int);
1023 /* A function to convert machine dependent ELF section header flags to
1024 BFD internal section header flags. */
1025 bool (*elf_backend_section_flags
)
1026 (const Elf_Internal_Shdr
*);
1028 /* A function that returns a struct containing ELF section flags and
1029 type for the given BFD section. */
1030 const struct bfd_elf_special_section
* (*get_sec_type_attr
)
1031 (bfd
*, asection
*);
1033 /* A function to handle unusual program segment types when creating BFD
1034 sections from ELF program segments. */
1035 bool (*elf_backend_section_from_phdr
)
1036 (bfd
*, Elf_Internal_Phdr
*, int, const char *);
1038 /* A function to set up the ELF section header for a BFD section in
1039 preparation for writing it out. This is where the flags and type
1040 fields are set for unusual sections. */
1041 bool (*elf_backend_fake_sections
)
1042 (bfd
*, Elf_Internal_Shdr
*, asection
*);
1044 /* A function to get the ELF section index for a BFD section. If
1045 this returns TRUE, the section was found. If it is a normal ELF
1046 section, *RETVAL should be left unchanged. If it is not a normal
1047 ELF section *RETVAL should be set to the SHN_xxxx index. */
1048 bool (*elf_backend_section_from_bfd_section
)
1049 (bfd
*, asection
*, int *retval
);
1051 /* If this field is not NULL, it is called by the add_symbols phase
1052 of a link just before adding a symbol to the global linker hash
1053 table. It may modify any of the fields as it wishes. If *NAME
1054 is set to NULL, the symbol will be skipped rather than being
1055 added to the hash table. This function is responsible for
1056 handling all processor dependent symbol bindings and section
1057 indices, and must set at least *FLAGS and *SEC for each processor
1058 dependent case; failure to do so will cause a link error. */
1059 bool (*elf_add_symbol_hook
)
1060 (bfd
*abfd
, struct bfd_link_info
*info
, Elf_Internal_Sym
*,
1061 const char **name
, flagword
*flags
, asection
**sec
, bfd_vma
*value
);
1063 /* If this field is not NULL, it is called by the elf_link_output_sym
1064 phase of a link for each symbol which will appear in the object file.
1065 On error, this function returns 0. 1 is returned when the symbol
1066 should be output, 2 is returned when the symbol should be discarded. */
1067 int (*elf_backend_link_output_symbol_hook
)
1068 (struct bfd_link_info
*info
, const char *, Elf_Internal_Sym
*,
1069 asection
*, struct elf_link_hash_entry
*);
1071 /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend
1072 linker the first time it encounters a dynamic object in the link.
1073 This function must create any sections required for dynamic
1074 linking. The ABFD argument is a dynamic object. The .interp,
1075 .dynamic, .dynsym, .dynstr, and .hash functions have already been
1076 created, and this function may modify the section flags if
1077 desired. This function will normally create the .got and .plt
1078 sections, but different backends have different requirements. */
1079 bool (*elf_backend_create_dynamic_sections
)
1080 (bfd
*abfd
, struct bfd_link_info
*info
);
1082 /* When creating a shared library, determine whether to omit the
1083 dynamic symbol for the section. */
1084 bool (*elf_backend_omit_section_dynsym
)
1085 (bfd
*output_bfd
, struct bfd_link_info
*info
, asection
*osec
);
1087 /* Return TRUE if relocations of targets are compatible to the extent
1088 that CHECK_RELOCS will properly process them. PR 4424. */
1089 bool (*relocs_compatible
) (const bfd_target
*, const bfd_target
*);
1091 /* The CHECK_RELOCS function is called after all input files have been
1092 opened. It is called once for each section with relocs of an object
1093 file. The function must look through the relocs and do any special
1094 handling required. This generally means allocating space in the
1095 global offset table, and perhaps allocating space for a reloc. The
1096 relocs are always passed as Rela structures; if the section
1097 actually uses Rel structures, the r_addend field will always be
1099 bool (*check_relocs
)
1100 (bfd
*abfd
, struct bfd_link_info
*info
, asection
*o
,
1101 const Elf_Internal_Rela
*relocs
);
1103 /* The CHECK_DIRECTIVES function is called once per input file by
1104 the add_symbols phase of the ELF backend linker. The function
1105 must inspect the bfd and create any additional symbols according
1106 to any custom directives in the bfd. */
1107 bool (*check_directives
)
1108 (bfd
*abfd
, struct bfd_link_info
*info
);
1110 /* The NOTICE_AS_NEEDED function is called as the linker is about to
1111 handle an as-needed lib (ACT = notice_as_needed), and after the
1112 linker has decided to keep the lib (ACT = notice_needed) or when
1113 the lib is not needed (ACT = notice_not_needed). */
1114 bool (*notice_as_needed
)
1115 (bfd
*abfd
, struct bfd_link_info
*info
, enum notice_asneeded_action act
);
1117 /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
1118 linker for every symbol which is defined by a dynamic object and
1119 referenced by a regular object. This is called after all the
1120 input files have been seen, but before the SIZE_DYNAMIC_SECTIONS
1121 function has been called. The hash table entry should be
1122 bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be
1123 defined in a section from a dynamic object. Dynamic object
1124 sections are not included in the final link, and this function is
1125 responsible for changing the value to something which the rest of
1126 the link can deal with. This will normally involve adding an
1127 entry to the .plt or .got or some such section, and setting the
1128 symbol to point to that. */
1129 bool (*elf_backend_adjust_dynamic_symbol
)
1130 (struct bfd_link_info
*info
, struct elf_link_hash_entry
*h
);
1132 /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker
1133 after all the linker input files have been seen but before the
1134 section sizes have been set. This is called after
1135 ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS. */
1136 bool (*elf_backend_always_size_sections
)
1137 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1139 /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend
1140 linker after all the linker input files have been seen but before
1141 the sections sizes have been set. This is called after
1142 ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols.
1143 It is only called when linking against a dynamic object. It must
1144 set the sizes of the dynamic sections, and may fill in their
1145 contents as well. The generic ELF linker can handle the .dynsym,
1146 .dynstr and .hash sections. This function must handle the
1147 .interp section and any sections created by the
1148 CREATE_DYNAMIC_SECTIONS entry point. */
1149 bool (*elf_backend_size_dynamic_sections
)
1150 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1152 /* The STRIP_ZERO_SIZED_DYNAMIC_SECTIONS function is called by the
1153 ELF backend linker to strip zero-sized dynamic sections after
1154 the section sizes have been set. */
1155 bool (*elf_backend_strip_zero_sized_dynamic_sections
)
1156 (struct bfd_link_info
*info
);
1158 /* Set TEXT_INDEX_SECTION and DATA_INDEX_SECTION, the output sections
1159 we keep to use as a base for relocs and symbols. */
1160 void (*elf_backend_init_index_section
)
1161 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1163 /* The RELOCATE_SECTION function is called by the ELF backend linker
1164 to handle the relocations for a section.
1166 The relocs are always passed as Rela structures; if the section
1167 actually uses Rel structures, the r_addend field will always be
1170 This function is responsible for adjust the section contents as
1171 necessary, and (if using Rela relocs and generating a
1172 relocatable output file) adjusting the reloc addend as
1175 This function does not have to worry about setting the reloc
1176 address or the reloc symbol index.
1178 LOCAL_SYMS is a pointer to the swapped in local symbols.
1180 LOCAL_SECTIONS is an array giving the section in the input file
1181 corresponding to the st_shndx field of each local symbol.
1183 The global hash table entry for the global symbols can be found
1184 via elf_sym_hashes (input_bfd).
1186 When generating relocatable output, this function must handle
1187 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
1188 going to be the section symbol corresponding to the output
1189 section, which means that the addend must be adjusted
1192 Returns FALSE on error, TRUE on success, 2 if successful and
1193 relocations should be written for this section. */
1194 int (*elf_backend_relocate_section
)
1195 (bfd
*output_bfd
, struct bfd_link_info
*info
, bfd
*input_bfd
,
1196 asection
*input_section
, bfd_byte
*contents
, Elf_Internal_Rela
*relocs
,
1197 Elf_Internal_Sym
*local_syms
, asection
**local_sections
);
1199 /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend
1200 linker just before it writes a symbol out to the .dynsym section.
1201 The processor backend may make any required adjustment to the
1202 symbol. It may also take the opportunity to set contents of the
1203 dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on
1204 all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called
1205 on those symbols which are defined by a dynamic object. */
1206 bool (*elf_backend_finish_dynamic_symbol
)
1207 (bfd
*output_bfd
, struct bfd_link_info
*info
,
1208 struct elf_link_hash_entry
*h
, Elf_Internal_Sym
*sym
);
1210 /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend
1211 linker just before it writes all the dynamic sections out to the
1212 output file. The FINISH_DYNAMIC_SYMBOL will have been called on
1213 all dynamic symbols. */
1214 bool (*elf_backend_finish_dynamic_sections
)
1215 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1217 /* A function to do any beginning processing needed for the ELF file
1218 before building the ELF headers and computing file positions. */
1219 void (*elf_backend_begin_write_processing
)
1220 (bfd
*, struct bfd_link_info
*);
1222 /* A function to do any final processing needed for the ELF file
1223 before writing it out. */
1224 bool (*elf_backend_final_write_processing
)
1227 /* This function is called by get_program_header_size. It should
1228 return the number of additional program segments which this BFD
1229 will need. It should return -1 on error. */
1230 int (*elf_backend_additional_program_headers
)
1231 (bfd
*, struct bfd_link_info
*);
1233 /* This function is called to modify an existing segment map in a
1234 backend specific fashion. */
1235 bool (*elf_backend_modify_segment_map
)
1236 (bfd
*, struct bfd_link_info
*);
1238 /* This function is called to modify program headers just before
1239 they are written. */
1240 bool (*elf_backend_modify_headers
)
1241 (bfd
*, struct bfd_link_info
*);
1243 /* This function is called to see if the PHDR header should be
1244 checked for validity. */
1245 bool (*elf_backend_allow_non_load_phdr
)
1246 (bfd
*, const Elf_Internal_Phdr
*, unsigned);
1248 /* This function is called before section garbage collection to
1249 mark entry symbol sections. */
1251 (struct bfd_link_info
*);
1253 /* This function is called during section garbage collection to
1254 mark sections that define global symbols. */
1255 bool (*gc_mark_dynamic_ref
)
1256 (struct elf_link_hash_entry
*, void *);
1258 /* This function is called during section gc to discover the section a
1259 particular relocation refers to. */
1260 elf_gc_mark_hook_fn gc_mark_hook
;
1262 /* This function, if defined, is called after the first gc marking pass
1263 to allow the backend to mark additional sections. */
1264 bool (*gc_mark_extra_sections
)
1265 (struct bfd_link_info
*, elf_gc_mark_hook_fn
);
1267 /* This function is called to initialise ELF file header info.
1268 Customised versions can modify things like the OS and ABI version. */
1269 bool (*elf_backend_init_file_header
)
1270 (bfd
*, struct bfd_link_info
*);
1272 /* This function, if defined, prints a symbol to file and returns the
1273 name of the symbol to be printed. It should return NULL to fall
1274 back to default symbol printing. */
1275 const char *(*elf_backend_print_symbol_all
)
1276 (bfd
*, void *, asymbol
*);
1278 /* This function, if defined, is called after all local symbols and
1279 global symbols converted to locals are emitted into the symtab
1280 section. It allows the backend to emit special local symbols
1281 not handled in the hash table. */
1282 bool (*elf_backend_output_arch_local_syms
)
1283 (bfd
*, struct bfd_link_info
*, void *,
1284 int (*) (void *, const char *, Elf_Internal_Sym
*, asection
*,
1285 struct elf_link_hash_entry
*));
1287 /* This function, if defined, is called after all symbols are emitted
1288 into the symtab section. It allows the backend to emit special
1289 global symbols not handled in the hash table. */
1290 bool (*elf_backend_output_arch_syms
)
1291 (bfd
*, struct bfd_link_info
*, void *,
1292 int (*) (void *, const char *, Elf_Internal_Sym
*, asection
*,
1293 struct elf_link_hash_entry
*));
1295 /* Filter what symbols of the output file to include in the import
1296 library if one is created. */
1297 unsigned int (*elf_backend_filter_implib_symbols
)
1298 (bfd
*, struct bfd_link_info
*, asymbol
**, long);
1300 /* Copy any information related to dynamic linking from a pre-existing
1301 symbol to a newly created symbol. Also called to copy flags and
1302 other back-end info to a weakdef, in which case the symbol is not
1303 newly created and plt/got refcounts and dynamic indices should not
1305 void (*elf_backend_copy_indirect_symbol
)
1306 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
1307 struct elf_link_hash_entry
*);
1309 /* Modify any information related to dynamic linking such that the
1310 symbol is not exported. */
1311 void (*elf_backend_hide_symbol
)
1312 (struct bfd_link_info
*, struct elf_link_hash_entry
*, bool);
1314 /* A function to do additional symbol fixup, called by
1315 _bfd_elf_fix_symbol_flags. */
1316 bool (*elf_backend_fixup_symbol
)
1317 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
1319 /* Merge the backend specific symbol attribute. */
1320 void (*elf_backend_merge_symbol_attribute
)
1321 (struct elf_link_hash_entry
*, unsigned int, bool, bool);
1323 /* This function, if defined, will return a string containing the
1324 name of a target-specific dynamic tag. */
1325 char *(*elf_backend_get_target_dtag
)
1328 /* Decide whether an undefined symbol is special and can be ignored.
1329 This is the case for OPTIONAL symbols on IRIX. */
1330 bool (*elf_backend_ignore_undef_symbol
)
1331 (struct elf_link_hash_entry
*);
1333 /* Emit relocations. Overrides default routine for emitting relocs,
1334 except during a relocatable link, or if all relocs are being emitted. */
1335 bool (*elf_backend_emit_relocs
)
1336 (bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*,
1337 struct elf_link_hash_entry
**);
1339 /* Update relocations. It is allowed to change the number and the order.
1340 In such a case hashes should be invalidated. */
1341 void (*elf_backend_update_relocs
)
1342 (asection
*, struct bfd_elf_section_reloc_data
*);
1344 /* Count relocations. Not called for relocatable links
1345 or if all relocs are being preserved in the output. */
1346 unsigned int (*elf_backend_count_relocs
)
1347 (struct bfd_link_info
*, asection
*);
1349 /* Count additionals relocations. Called for relocatable links if
1350 additional relocations needs to be created. */
1351 unsigned int (*elf_backend_count_additional_relocs
)
1354 /* Say whether to sort relocs output by ld -r and ld --emit-relocs,
1355 by r_offset. If NULL, default to true. */
1356 bool (*sort_relocs_p
)
1359 /* This function, if defined, is called when an NT_PRSTATUS note is found
1361 bool (*elf_backend_grok_prstatus
)
1362 (bfd
*, Elf_Internal_Note
*);
1364 /* This function, if defined, is called when an NT_PSINFO or NT_PRPSINFO
1365 note is found in a core file. */
1366 bool (*elf_backend_grok_psinfo
)
1367 (bfd
*, Elf_Internal_Note
*);
1369 /* This function, if defined, is called when a "FreeBSD" NT_PRSTATUS
1370 note is found in a core file. */
1371 bool (*elf_backend_grok_freebsd_prstatus
)
1372 (bfd
*, Elf_Internal_Note
*);
1374 /* This function, if defined, is called to write a note to a corefile. */
1375 char *(*elf_backend_write_core_note
)
1376 (bfd
*abfd
, char *buf
, int *bufsiz
, int note_type
, ...);
1378 /* This function, if defined, is called to convert target-specific
1379 section flag names into hex values. */
1380 flagword (*elf_backend_lookup_section_flags_hook
)
1383 /* This function returns class of a reloc type. */
1384 enum elf_reloc_type_class (*elf_backend_reloc_type_class
)
1385 (const struct bfd_link_info
*, const asection
*, const Elf_Internal_Rela
*);
1387 /* This function, if defined, removes information about discarded functions
1388 from other sections which mention them. */
1389 bool (*elf_backend_discard_info
)
1390 (bfd
*, struct elf_reloc_cookie
*, struct bfd_link_info
*);
1392 /* This function, if defined, signals that the function above has removed
1393 the discarded relocations for this section. */
1394 bool (*elf_backend_ignore_discarded_relocs
)
1397 /* What to do when ld finds relocations against symbols defined in
1398 discarded sections. */
1399 unsigned int (*action_discarded
)
1402 /* This function returns the width of FDE pointers in bytes, or 0 if
1403 that can't be determined for some reason. The default definition
1404 goes by the bfd's EI_CLASS. */
1405 unsigned int (*elf_backend_eh_frame_address_size
)
1406 (bfd
*, const asection
*);
1408 /* These functions tell elf-eh-frame whether to attempt to turn
1409 absolute or lsda encodings into pc-relative ones. The default
1410 definition enables these transformations. */
1411 bool (*elf_backend_can_make_relative_eh_frame
)
1412 (bfd
*, struct bfd_link_info
*, asection
*);
1413 bool (*elf_backend_can_make_lsda_relative_eh_frame
)
1414 (bfd
*, struct bfd_link_info
*, asection
*);
1416 /* This function returns an encoding after computing the encoded
1417 value (and storing it in ENCODED) for the given OFFSET into OSEC,
1418 to be stored in at LOC_OFFSET into the LOC_SEC input section.
1419 The default definition chooses a 32-bit PC-relative encoding. */
1420 bfd_byte (*elf_backend_encode_eh_address
)
1421 (bfd
*abfd
, struct bfd_link_info
*info
,
1422 asection
*osec
, bfd_vma offset
,
1423 asection
*loc_sec
, bfd_vma loc_offset
,
1426 /* This function, if defined, may write out the given section.
1427 Returns TRUE if it did so and FALSE if the caller should. */
1428 bool (*elf_backend_write_section
)
1429 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
1431 /* This function, if defined, returns TRUE if it is section symbols
1432 only that are considered local for the purpose of partitioning the
1433 symbol table into local and global symbols. This should be NULL
1434 for most targets, in which case the correct thing will be done.
1435 MIPS ELF, at least on the Irix 5, has special requirements. */
1436 bool (*elf_backend_elfsym_local_is_section
)
1439 /* The level of IRIX compatibility we're striving for.
1440 MIPS ELF specific function. */
1441 irix_compat_t (*elf_backend_mips_irix_compat
)
1444 reloc_howto_type
*(*elf_backend_mips_rtype_to_howto
)
1445 (bfd
*, unsigned int, bool);
1447 /* The swapping table to use when dealing with ECOFF information.
1448 Used for the MIPS ELF .mdebug section. */
1449 const struct ecoff_debug_swap
*elf_backend_ecoff_debug_swap
;
1451 /* This function implements `bfd_elf_bfd_from_remote_memory';
1452 see elf.c, elfcode.h. */
1453 bfd
*(*elf_backend_bfd_from_remote_memory
)
1454 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
1455 int (*target_read_memory
) (bfd_vma vma
, bfd_byte
*myaddr
,
1456 bfd_size_type len
));
1458 bool (*elf_backend_core_find_build_id
) (bfd
*, bfd_vma
);
1460 /* This function is used by `_bfd_elf_get_synthetic_symtab';
1462 bfd_vma (*plt_sym_val
) (bfd_vma
, const asection
*, const arelent
*);
1464 /* Is symbol defined in common section? */
1465 bool (*common_definition
) (Elf_Internal_Sym
*);
1467 /* Return a common section index for section. */
1468 unsigned int (*common_section_index
) (asection
*);
1470 /* Return a common section for section. */
1471 asection
*(*common_section
) (asection
*);
1473 /* Return TRUE if we can merge 2 definitions. */
1474 bool (*merge_symbol
) (struct elf_link_hash_entry
*,
1475 const Elf_Internal_Sym
*, asection
**,
1477 bfd
*, const asection
*);
1479 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
1480 bool (*elf_hash_symbol
) (struct elf_link_hash_entry
*);
1482 /* If non-NULL, called to register the location of XLAT_LOC within
1483 .MIPS.xhash at which real final dynindx for H will be written.
1484 If XLAT_LOC is zero, the symbol is not included in
1485 .MIPS.xhash and no dynindx will be written. */
1486 void (*record_xhash_symbol
)
1487 (struct elf_link_hash_entry
*h
, bfd_vma xlat_loc
);
1489 /* Return TRUE if type is a function symbol type. */
1490 bool (*is_function_type
) (unsigned int type
);
1492 /* If the ELF symbol SYM might be a function in SEC, return the
1493 function size and set *CODE_OFF to the function's entry point,
1494 otherwise return zero. */
1495 bfd_size_type (*maybe_function_sym
) (const asymbol
*sym
, asection
*sec
,
1498 /* Given NAME, the name of a relocation section stripped of its
1499 .rel/.rela prefix, return the section in ABFD to which the
1500 relocations apply. */
1501 asection
*(*get_reloc_section
) (bfd
*abfd
, const char *name
);
1503 /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
1504 has a type >= SHT_LOOS. Returns TRUE if the fields were initialised,
1505 FALSE otherwise. Can be called multiple times for a given section,
1506 until it returns TRUE. Most of the times it is called ISECTION will be
1507 set to an input section that might be associated with the output section.
1508 The last time that it is called, ISECTION will be set to NULL. */
1509 bool (*elf_backend_copy_special_section_fields
)
1510 (const bfd
*ibfd
, bfd
*obfd
, const Elf_Internal_Shdr
*isection
,
1511 Elf_Internal_Shdr
*osection
);
1513 /* Used to handle bad SHF_LINK_ORDER input. */
1514 void (*link_order_error_handler
) (const char *, ...);
1516 /* Name of the PLT relocation section. */
1517 const char *relplt_name
;
1519 /* Alternate EM_xxxx machine codes for this backend. */
1520 int elf_machine_alt1
;
1521 int elf_machine_alt2
;
1523 const struct elf_size_info
*s
;
1525 /* An array of target specific special sections. */
1526 const struct bfd_elf_special_section
*special_sections
;
1528 /* The size in bytes of the header for the GOT. This includes the
1529 so-called reserved entries on some systems. */
1530 bfd_vma got_header_size
;
1532 /* The size of the GOT entry for the symbol pointed to by H if non-NULL,
1533 otherwise by the local symbol with index SYMNDX in IBFD. */
1534 bfd_vma (*got_elt_size
) (bfd
*, struct bfd_link_info
*,
1535 struct elf_link_hash_entry
*h
,
1536 bfd
*ibfd
, unsigned long symndx
);
1538 /* The vendor name to use for a processor-standard attributes section. */
1539 const char *obj_attrs_vendor
;
1541 /* The section name to use for a processor-standard attributes section. */
1542 const char *obj_attrs_section
;
1544 /* Return 1, 2 or 3 to indicate what type of arguments a
1545 processor-specific tag takes. */
1546 int (*obj_attrs_arg_type
) (int);
1548 /* The section type to use for an attributes section. */
1549 unsigned int obj_attrs_section_type
;
1551 /* This function determines the order in which any attributes are
1552 written. It must be defined for input in the range
1553 LEAST_KNOWN_OBJ_ATTRIBUTE..NUM_KNOWN_OBJ_ATTRIBUTES-1 (this range
1554 is used in order to make unity easy). The returned value is the
1555 actual tag number to place in the input position. */
1556 int (*obj_attrs_order
) (int);
1558 /* Handle merging unknown attributes; either warn and return TRUE,
1559 or give an error and return FALSE. */
1560 bool (*obj_attrs_handle_unknown
) (bfd
*, int);
1562 /* Parse GNU properties. Return the property kind. If the property
1563 is corrupt, issue an error message and return property_corrupt. */
1564 enum elf_property_kind (*parse_gnu_properties
) (bfd
*, unsigned int,
1568 /* Merge GNU properties. Return TRUE if property is updated. */
1569 bool (*merge_gnu_properties
) (struct bfd_link_info
*, bfd
*, bfd
*,
1570 elf_property
*, elf_property
*);
1572 /* Set up GNU properties. */
1573 bfd
*(*setup_gnu_properties
) (struct bfd_link_info
*);
1575 /* Fix up GNU properties. */
1576 void (*fixup_gnu_properties
) (struct bfd_link_info
*,
1577 elf_property_list
**);
1579 /* Encoding used for compact EH tables. */
1580 int (*compact_eh_encoding
) (struct bfd_link_info
*);
1582 /* Opcode representing no unwind. */
1583 int (*cant_unwind_opcode
) (struct bfd_link_info
*);
1585 /* Called when emitting an ELF symbol whoes input version had an
1586 ST_SHNDX field set to a value in the range SHN_LOPROC..SHN_HIOS.
1587 Returns the value to be installed in the ST_SHNDX field of the
1588 emitted symbol. If not defined, the value is left unchanged. */
1589 unsigned int (*symbol_section_index
) (bfd
*, elf_symbol_type
*);
1591 /* Called when a section has extra reloc sections. */
1592 bool (*init_secondary_reloc_section
) (bfd
*, Elf_Internal_Shdr
*,
1593 const char *, unsigned int);
1595 /* Called when after loading the normal relocs for a section. */
1596 bool (*slurp_secondary_relocs
) (bfd
*, asection
*, asymbol
**, bool);
1598 /* Called after writing the normal relocs for a section. */
1599 bool (*write_secondary_relocs
) (bfd
*, asection
*);
1601 /* This is non-zero if static TLS segments require a special alignment. */
1602 unsigned static_tls_alignment
;
1604 /* Alignment for the PT_GNU_STACK segment. */
1605 unsigned stack_align
;
1607 /* Flag bits to assign to a section of type SHT_STRTAB. */
1608 unsigned long elf_strtab_flags
;
1610 /* This is TRUE if the linker should act like collect and gather
1611 global constructors and destructors by name. This is TRUE for
1612 MIPS ELF because the Irix 5 tools can not handle the .init
1614 unsigned collect
: 1;
1616 /* This is TRUE if the linker should ignore changes to the type of a
1617 symbol. This is TRUE for MIPS ELF because some Irix 5 objects
1618 record undefined functions as STT_OBJECT although the definitions
1620 unsigned type_change_ok
: 1;
1622 /* Whether the backend may use REL relocations. (Some backends use
1623 both REL and RELA relocations, and this flag is set for those
1625 unsigned may_use_rel_p
: 1;
1627 /* Whether the backend may use RELA relocations. (Some backends use
1628 both REL and RELA relocations, and this flag is set for those
1630 unsigned may_use_rela_p
: 1;
1632 /* Whether the default relocation type is RELA. If a backend with
1633 this flag set wants REL relocations for a particular section,
1634 it must note that explicitly. Similarly, if this flag is clear,
1635 and the backend wants RELA relocations for a particular
1637 unsigned default_use_rela_p
: 1;
1639 /* True if PLT and copy relocations should be RELA by default. */
1640 unsigned rela_plts_and_copies_p
: 1;
1642 /* Set if RELA relocations for a relocatable link can be handled by
1643 generic code. Backends that set this flag need do nothing in the
1644 backend relocate_section routine for relocatable linking. */
1645 unsigned rela_normal
: 1;
1647 /* Set if DT_REL/DT_RELA/DT_RELSZ/DT_RELASZ should not include PLT
1649 unsigned dtrel_excludes_plt
: 1;
1651 /* TRUE if addresses "naturally" sign extend. This is used when
1652 swapping in from Elf32 when BFD64. */
1653 unsigned sign_extend_vma
: 1;
1655 unsigned want_got_plt
: 1;
1656 unsigned plt_readonly
: 1;
1657 unsigned want_plt_sym
: 1;
1658 unsigned plt_not_loaded
: 1;
1659 unsigned plt_alignment
: 4;
1660 unsigned can_gc_sections
: 1;
1661 unsigned can_refcount
: 1;
1662 unsigned want_got_sym
: 1;
1663 unsigned want_dynbss
: 1;
1664 unsigned want_dynrelro
: 1;
1666 /* Targets which do not support physical addressing often require
1667 that the p_paddr field in the section header to be set to zero.
1668 This field indicates whether this behavior is required. */
1669 unsigned want_p_paddr_set_to_zero
: 1;
1671 /* Target has broken hardware and/or kernel that requires pages not
1672 to be mapped twice with different permissions. */
1673 unsigned no_page_alias
: 1;
1675 /* True if an object file lacking a .note.GNU-stack section
1676 should be assumed to be requesting exec stack. At least one
1677 other file in the link needs to have a .note.GNU-stack section
1678 for a PT_GNU_STACK segment to be created. */
1679 unsigned default_execstack
: 1;
1681 /* True if elf_section_data(sec)->this_hdr.contents is sec->rawsize
1682 in length rather than sec->size in length, if sec->rawsize is
1683 non-zero and smaller than sec->size. */
1684 unsigned caches_rawsize
: 1;
1686 /* Address of protected data defined in the shared library may be
1687 external, i.e., due to copy relocation. */
1688 unsigned extern_protected_data
: 1;
1690 /* True if `_bfd_elf_link_renumber_dynsyms' must be called even for
1692 unsigned always_renumber_dynsyms
: 1;
1694 /* True if the 32-bit Linux PRPSINFO structure's `pr_uid' and `pr_gid'
1695 members use a 16-bit data type. */
1696 unsigned linux_prpsinfo32_ugid16
: 1;
1698 /* True if the 64-bit Linux PRPSINFO structure's `pr_uid' and `pr_gid'
1699 members use a 16-bit data type. */
1700 unsigned linux_prpsinfo64_ugid16
: 1;
1703 /* Information about reloc sections associated with a bfd_elf_section_data
1705 struct bfd_elf_section_reloc_data
1707 /* The ELF header for the reloc section associated with this
1709 Elf_Internal_Shdr
*hdr
;
1710 /* The number of relocations currently assigned to HDR. */
1712 /* The ELF section number of the reloc section. Only used for an
1715 /* Used by the backend linker to store the symbol hash table entries
1716 associated with relocs against global symbols. */
1717 struct elf_link_hash_entry
**hashes
;
1720 /* Information stored for each BFD section in an ELF file. This
1721 structure is allocated by elf_new_section_hook. */
1723 struct bfd_elf_section_data
1725 /* The ELF header for this section. */
1726 Elf_Internal_Shdr this_hdr
;
1728 /* INPUT_SECTION_FLAGS if specified in the linker script. */
1729 struct flag_info
*section_flag_info
;
1731 /* Information about the REL and RELA reloc sections associated
1732 with this section, if any. */
1733 struct bfd_elf_section_reloc_data rel
, rela
;
1735 /* The ELF section number of this section. */
1738 /* Used by the backend linker when generating a shared library to
1739 record the dynamic symbol index for a section symbol
1740 corresponding to this section. A value of 0 means that there is
1741 no dynamic symbol for this section. */
1744 /* A pointer to the linked-to section for SHF_LINK_ORDER. */
1745 asection
*linked_to
;
1747 /* A pointer to the swapped relocs. If the section uses REL relocs,
1748 rather than RELA, all the r_addend fields will be zero. This
1749 pointer may be NULL. It is used by the backend linker. */
1750 Elf_Internal_Rela
*relocs
;
1752 /* A pointer to a linked list tracking dynamic relocs copied for
1756 /* A pointer to the bfd section used for dynamic relocs. */
1760 /* Group name, if this section is a member of a group. */
1763 /* Group signature sym, if this is the SHT_GROUP section. */
1764 struct bfd_symbol
*id
;
1767 /* For a member of a group, points to the SHT_GROUP section.
1768 NULL for the SHT_GROUP section itself and non-group sections. */
1769 asection
*sec_group
;
1771 /* A linked list of member sections in the group. Circular when used by
1772 the linker. For the SHT_GROUP section, points at first member. */
1773 asection
*next_in_group
;
1775 /* The FDEs associated with this section. The u.fde.next_in_section
1776 field acts as a chain pointer. */
1777 struct eh_cie_fde
*fde_list
;
1779 /* Link from a text section to its .eh_frame_entry section. */
1780 asection
*eh_frame_entry
;
1782 /* TRUE if the section has secondary reloc sections associated with it.
1783 FIXME: In the future it might be better to change this into a list
1784 of secondary reloc sections, making lookup easier and faster. */
1785 bool has_secondary_relocs
;
1787 /* A pointer used for various section optimizations. */
1791 #define elf_section_data(sec) ((struct bfd_elf_section_data*)(sec)->used_by_bfd)
1792 #define elf_linked_to_section(sec) (elf_section_data(sec)->linked_to)
1793 #define elf_section_type(sec) (elf_section_data(sec)->this_hdr.sh_type)
1794 #define elf_section_flags(sec) (elf_section_data(sec)->this_hdr.sh_flags)
1795 #define elf_section_info(sec) (elf_section_data(sec)->this_hdr.sh_info)
1796 #define elf_group_name(sec) (elf_section_data(sec)->group.name)
1797 #define elf_group_id(sec) (elf_section_data(sec)->group.id)
1798 #define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group)
1799 #define elf_fde_list(sec) (elf_section_data(sec)->fde_list)
1800 #define elf_sec_group(sec) (elf_section_data(sec)->sec_group)
1801 #define elf_section_eh_frame_entry(sec) (elf_section_data(sec)->eh_frame_entry)
1803 #define xvec_get_elf_backend_data(xvec) \
1804 ((const struct elf_backend_data *) (xvec)->backend_data)
1806 #define get_elf_backend_data(abfd) \
1807 xvec_get_elf_backend_data ((abfd)->xvec)
1809 /* The least object attributes (within an attributes subsection) known
1810 for any target. Some code assumes that the value 0 is not used and
1811 the field for that attribute can instead be used as a marker to
1812 indicate that attributes have been initialized. */
1813 #define LEAST_KNOWN_OBJ_ATTRIBUTE 2
1815 /* The maximum number of known object attributes for any target. */
1816 #define NUM_KNOWN_OBJ_ATTRIBUTES 77
1818 /* The value of an object attribute. The type indicates whether the attribute
1819 holds and integer, a string, or both. It can also indicate that there can
1820 be no default (i.e. all values must be written to file, even zero), or
1821 that the value is in error and should not be written to file. */
1823 typedef struct obj_attribute
1825 #define ATTR_TYPE_FLAG_INT_VAL (1 << 0)
1826 #define ATTR_TYPE_FLAG_STR_VAL (1 << 1)
1827 #define ATTR_TYPE_FLAG_NO_DEFAULT (1 << 2)
1828 #define ATTR_TYPE_FLAG_ERROR (1 << 3)
1830 #define ATTR_TYPE_HAS_INT_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_INT_VAL)
1831 #define ATTR_TYPE_HAS_STR_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_STR_VAL)
1832 #define ATTR_TYPE_HAS_NO_DEFAULT(TYPE) ((TYPE) & ATTR_TYPE_FLAG_NO_DEFAULT)
1833 #define ATTR_TYPE_HAS_ERROR(TYPE) ((TYPE) & ATTR_TYPE_FLAG_ERROR)
1840 typedef struct obj_attribute_list
1842 struct obj_attribute_list
*next
;
1845 } obj_attribute_list
;
1847 /* Object attributes may either be defined by the processor ABI, index
1848 OBJ_ATTR_PROC in the *_obj_attributes arrays, or be GNU-specific
1849 (and possibly also processor-specific), index OBJ_ATTR_GNU. */
1850 #define OBJ_ATTR_PROC 0
1851 #define OBJ_ATTR_GNU 1
1852 #define OBJ_ATTR_FIRST OBJ_ATTR_PROC
1853 #define OBJ_ATTR_LAST OBJ_ATTR_GNU
1855 /* The following object attribute tags are taken as generic, for all
1856 targets and for "gnu" where there is no target standard. */
1863 Tag_compatibility
= 32
1866 /* The following struct stores information about every SystemTap section
1867 found in the object file. */
1870 struct sdt_note
*next
;
1875 /* tdata information grabbed from an elf core file. */
1876 struct core_elf_obj_tdata
1885 /* Extra tdata information held for output ELF BFDs. */
1886 struct output_elf_obj_tdata
1888 struct elf_segment_map
*seg_map
;
1889 struct elf_strtab_hash
*strtab_ptr
;
1891 /* STT_SECTION symbols for each section */
1892 asymbol
**section_syms
;
1894 /* Used to determine if PT_GNU_EH_FRAME segment header should be
1896 asection
*eh_frame_hdr
;
1898 /* NT_GNU_BUILD_ID note type info. */
1901 bool (*after_write_object_contents
) (bfd
*);
1906 /* Records the result of `get_program_header_size'. */
1907 bfd_size_type program_header_size
;
1909 /* Used when laying out sections. */
1910 file_ptr next_file_pos
;
1912 /* Linker information. */
1913 struct bfd_link_info
*link_info
;
1915 unsigned int num_section_syms
;
1916 unsigned int shstrtab_section
, strtab_section
;
1918 /* Segment flags for the PT_GNU_STACK segment. */
1919 unsigned int stack_flags
;
1921 /* Used to determine if the e_flags field has been initialized */
1925 /* Indicate if the bfd contains SHF_GNU_MBIND/SHF_GNU_RETAIN sections or
1926 symbols that have the STT_GNU_IFUNC symbol type or STB_GNU_UNIQUE
1927 binding. Used to set the osabi field in the ELF header structure. */
1930 elf_gnu_osabi_mbind
= 1 << 0,
1931 elf_gnu_osabi_ifunc
= 1 << 1,
1932 elf_gnu_osabi_unique
= 1 << 2,
1933 elf_gnu_osabi_retain
= 1 << 3,
1936 typedef struct elf_section_list
1938 Elf_Internal_Shdr hdr
;
1940 struct elf_section_list
* next
;
1943 enum dynamic_lib_link_class
{
1947 DYN_NO_ADD_NEEDED
= 4,
1951 /* Some private data is stashed away for future use using the tdata pointer
1952 in the bfd structure. */
1954 struct elf_obj_tdata
1956 Elf_Internal_Ehdr elf_header
[1]; /* Actual data, but ref like ptr */
1957 Elf_Internal_Shdr
**elf_sect_ptr
;
1958 Elf_Internal_Phdr
*phdr
;
1959 Elf_Internal_Shdr symtab_hdr
;
1960 Elf_Internal_Shdr shstrtab_hdr
;
1961 Elf_Internal_Shdr strtab_hdr
;
1962 Elf_Internal_Shdr dynsymtab_hdr
;
1963 Elf_Internal_Shdr dynstrtab_hdr
;
1964 Elf_Internal_Shdr dynversym_hdr
;
1965 Elf_Internal_Shdr dynverref_hdr
;
1966 Elf_Internal_Shdr dynverdef_hdr
;
1967 elf_section_list
* symtab_shndx_list
;
1968 bfd_vma gp
; /* The gp value */
1969 unsigned int gp_size
; /* The gp size */
1970 unsigned int num_elf_sections
; /* elf_sect_ptr size */
1971 unsigned char *being_created
;
1973 /* A mapping from external symbols to entries in the linker hash
1974 table, used when linking. This is indexed by the symbol index
1975 minus the sh_info field of the symbol table header. */
1976 struct elf_link_hash_entry
**sym_hashes
;
1978 /* Track usage and final offsets of GOT entries for local symbols.
1979 This array is indexed by symbol index. Elements are used
1980 identically to "got" in struct elf_link_hash_entry. */
1983 bfd_signed_vma
*refcounts
;
1985 struct got_entry
**ents
;
1988 /* The linker ELF emulation code needs to let the backend ELF linker
1989 know what filename should be used for a dynamic object if the
1990 dynamic object is found using a search. The emulation code then
1991 sometimes needs to know what name was actually used. Until the
1992 file has been added to the linker symbol table, this field holds
1993 the name the linker wants. After it has been added, it holds the
1994 name actually used, which will be the DT_SONAME entry if there is
1996 const char *dt_name
;
1998 /* The linker emulation needs to know what audit libs
1999 are used by a dynamic object. */
2000 const char *dt_audit
;
2002 /* Used by find_nearest_line entry point. */
2005 /* A place to stash dwarf1 info for this bfd. */
2006 struct dwarf1_debug
*dwarf1_find_line_info
;
2008 /* A place to stash dwarf2 info for this bfd. */
2009 void *dwarf2_find_line_info
;
2011 /* Stash away info for yet another find line/function variant. */
2012 void *elf_find_function_cache
;
2014 /* Number of symbol version definitions we are about to emit. */
2015 unsigned int cverdefs
;
2017 /* Number of symbol version references we are about to emit. */
2018 unsigned int cverrefs
;
2020 /* Symbol version definitions in external objects. */
2021 Elf_Internal_Verdef
*verdef
;
2023 /* Symbol version references to external objects. */
2024 Elf_Internal_Verneed
*verref
;
2026 /* A pointer to the .eh_frame section. */
2027 asection
*eh_frame_section
;
2029 /* Symbol buffer. */
2032 /* List of GNU properties. Will be updated by setup_gnu_properties
2033 after all input GNU properties are merged for output. */
2034 elf_property_list
*properties
;
2036 obj_attribute known_obj_attributes
[2][NUM_KNOWN_OBJ_ATTRIBUTES
];
2037 obj_attribute_list
*other_obj_attributes
[2];
2039 /* Linked-list containing information about every Systemtap section
2040 found in the object file. Each section corresponds to one entry
2042 struct sdt_note
*sdt_note_head
;
2044 Elf_Internal_Shdr
**group_sect_ptr
;
2045 unsigned int num_group
;
2047 /* Index into group_sect_ptr, updated by setup_group when finding a
2048 section's group. Used to optimize subsequent group searches. */
2049 unsigned int group_search_offset
;
2051 unsigned int symtab_section
, dynsymtab_section
;
2052 unsigned int dynversym_section
, dynverdef_section
, dynverref_section
;
2054 /* An identifier used to distinguish different target
2055 specific extensions to this structure. */
2056 ENUM_BITFIELD (elf_target_id
) object_id
: 6;
2058 /* Whether a dyanmic object was specified normally on the linker
2059 command line, or was specified when --as-needed was in effect,
2060 or was found via a DT_NEEDED entry. */
2061 ENUM_BITFIELD (dynamic_lib_link_class
) dyn_lib_class
: 4;
2063 /* Whether the bfd uses OS specific bits that require ELFOSABI_GNU. */
2064 ENUM_BITFIELD (elf_gnu_osabi
) has_gnu_osabi
: 4;
2066 /* Whether if the bfd contains the GNU_PROPERTY_NO_COPY_ON_PROTECTED
2068 unsigned int has_no_copy_on_protected
: 1;
2070 /* Whether if the bfd contains the
2071 GNU_PROPERTY_1_NEEDED_INDIRECT_EXTERN_ACCESS property. */
2072 unsigned int has_indirect_extern_access
: 1;
2074 /* Irix 5 often screws up the symbol table, sorting local symbols
2075 after global symbols. This flag is set if the symbol table in
2076 this BFD appears to be screwed up. If it is, we ignore the
2077 sh_info field in the symbol table header, and always read all the
2079 unsigned int bad_symtab
: 1;
2081 /* Set if DT_FLAGS_1 has DF_1_PIE set. */
2082 unsigned int is_pie
: 1;
2084 /* Information grabbed from an elf core file. */
2085 struct core_elf_obj_tdata
*core
;
2087 /* More information held for output ELF BFDs. */
2088 struct output_elf_obj_tdata
*o
;
2091 #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
2093 #define elf_object_id(bfd) (elf_tdata(bfd) -> object_id)
2094 #define elf_program_header_size(bfd) (elf_tdata(bfd) -> o->program_header_size)
2095 #define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header)
2096 #define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr)
2097 #define elf_numsections(bfd) (elf_tdata(bfd) -> num_elf_sections)
2098 #define elf_seg_map(bfd) (elf_tdata(bfd) -> o->seg_map)
2099 #define elf_link_info(bfd) (elf_tdata(bfd) -> o->link_info)
2100 #define elf_next_file_pos(bfd) (elf_tdata(bfd) -> o->next_file_pos)
2101 #define elf_eh_frame_hdr(bfd) (elf_tdata(bfd) -> o->eh_frame_hdr)
2102 #define elf_stack_flags(bfd) (elf_tdata(bfd) -> o->stack_flags)
2103 #define elf_shstrtab(bfd) (elf_tdata(bfd) -> o->strtab_ptr)
2104 #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section)
2105 #define elf_symtab_shndx_list(bfd) (elf_tdata(bfd) -> symtab_shndx_list)
2106 #define elf_strtab_sec(bfd) (elf_tdata(bfd) -> o->strtab_section)
2107 #define elf_shstrtab_sec(bfd) (elf_tdata(bfd) -> o->shstrtab_section)
2108 #define elf_symtab_hdr(bfd) (elf_tdata(bfd) -> symtab_hdr)
2109 #define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section)
2110 #define elf_dynversym(bfd) (elf_tdata(bfd) -> dynversym_section)
2111 #define elf_dynverdef(bfd) (elf_tdata(bfd) -> dynverdef_section)
2112 #define elf_dynverref(bfd) (elf_tdata(bfd) -> dynverref_section)
2113 #define elf_eh_frame_section(bfd) \
2114 (elf_tdata(bfd) -> eh_frame_section)
2115 #define elf_section_syms(bfd) (elf_tdata(bfd) -> o->section_syms)
2116 #define elf_num_section_syms(bfd) (elf_tdata(bfd) -> o->num_section_syms)
2117 #define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
2118 #define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
2119 #define elf_gp(bfd) (elf_tdata(bfd) -> gp)
2120 #define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size)
2121 #define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes)
2122 #define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts)
2123 #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets)
2124 #define elf_local_got_ents(bfd) (elf_tdata(bfd) -> local_got.ents)
2125 #define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name)
2126 #define elf_dt_audit(bfd) (elf_tdata(bfd) -> dt_audit)
2127 #define elf_dyn_lib_class(bfd) (elf_tdata(bfd) -> dyn_lib_class)
2128 #define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab)
2129 #define elf_flags_init(bfd) (elf_tdata(bfd) -> o->flags_init)
2130 #define elf_known_obj_attributes(bfd) (elf_tdata (bfd) -> known_obj_attributes)
2131 #define elf_other_obj_attributes(bfd) (elf_tdata (bfd) -> other_obj_attributes)
2132 #define elf_known_obj_attributes_proc(bfd) \
2133 (elf_known_obj_attributes (bfd) [OBJ_ATTR_PROC])
2134 #define elf_other_obj_attributes_proc(bfd) \
2135 (elf_other_obj_attributes (bfd) [OBJ_ATTR_PROC])
2136 #define elf_properties(bfd) (elf_tdata (bfd) -> properties)
2137 #define elf_has_no_copy_on_protected(bfd) \
2138 (elf_tdata(bfd) -> has_no_copy_on_protected)
2139 #define elf_has_indirect_extern_access(bfd) \
2140 (elf_tdata(bfd) -> has_indirect_extern_access)
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);
2485 extern Elf_Internal_Rela
*_bfd_elf_link_info_read_relocs
2486 (bfd
*, struct bfd_link_info
*, asection
*, void *, Elf_Internal_Rela
*,
2489 extern bool _bfd_elf_link_output_relocs
2490 (bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*,
2491 struct elf_link_hash_entry
**);
2493 extern bool _bfd_elf_adjust_dynamic_copy
2494 (struct bfd_link_info
*, struct elf_link_hash_entry
*, asection
*);
2496 extern bool _bfd_elf_dynamic_symbol_p
2497 (struct elf_link_hash_entry
*, struct bfd_link_info
*, bool);
2499 extern bool _bfd_elf_symbol_refs_local_p
2500 (struct elf_link_hash_entry
*, struct bfd_link_info
*, bool);
2502 extern bfd_reloc_status_type bfd_elf_perform_complex_relocation
2503 (bfd
*, asection
*, bfd_byte
*, Elf_Internal_Rela
*, bfd_vma
);
2505 extern bool _bfd_elf_setup_sections
2508 extern struct bfd_link_hash_entry
*bfd_elf_define_start_stop
2509 (struct bfd_link_info
*, const char *, asection
*);
2511 extern bool _bfd_elf_init_file_header (bfd
*, struct bfd_link_info
*);
2513 extern bool _bfd_elf_final_write_processing (bfd
*);
2515 extern bfd_cleanup bfd_elf32_object_p
2517 extern bfd_cleanup bfd_elf32_core_file_p
2519 extern char *bfd_elf32_core_file_failing_command
2521 extern int bfd_elf32_core_file_failing_signal
2523 extern bool bfd_elf32_core_file_matches_executable_p
2525 extern int bfd_elf32_core_file_pid
2527 extern bool _bfd_elf32_core_find_build_id
2530 extern bool bfd_elf32_swap_symbol_in
2531 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
2532 extern void bfd_elf32_swap_symbol_out
2533 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
2534 extern void bfd_elf32_swap_reloc_in
2535 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2536 extern void bfd_elf32_swap_reloc_out
2537 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2538 extern void bfd_elf32_swap_reloca_in
2539 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2540 extern void bfd_elf32_swap_reloca_out
2541 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2542 extern void bfd_elf32_swap_phdr_in
2543 (bfd
*, const Elf32_External_Phdr
*, Elf_Internal_Phdr
*);
2544 extern void bfd_elf32_swap_phdr_out
2545 (bfd
*, const Elf_Internal_Phdr
*, Elf32_External_Phdr
*);
2546 extern void bfd_elf32_swap_dyn_in
2547 (bfd
*, const void *, Elf_Internal_Dyn
*);
2548 extern void bfd_elf32_swap_dyn_out
2549 (bfd
*, const Elf_Internal_Dyn
*, void *);
2550 extern long bfd_elf32_slurp_symbol_table
2551 (bfd
*, asymbol
**, bool);
2552 extern bool bfd_elf32_write_shdrs_and_ehdr
2554 extern int bfd_elf32_write_out_phdrs
2555 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
2556 extern bool bfd_elf32_checksum_contents
2557 (bfd
* , void (*) (const void *, size_t, void *), void *);
2558 extern void bfd_elf32_write_relocs
2559 (bfd
*, asection
*, void *);
2560 extern bool bfd_elf32_slurp_reloc_table
2561 (bfd
*, asection
*, asymbol
**, bool);
2563 extern bfd_cleanup bfd_elf64_object_p
2565 extern bfd_cleanup bfd_elf64_core_file_p
2567 extern char *bfd_elf64_core_file_failing_command
2569 extern int bfd_elf64_core_file_failing_signal
2571 extern bool bfd_elf64_core_file_matches_executable_p
2573 extern int bfd_elf64_core_file_pid
2575 extern bool _bfd_elf64_core_find_build_id
2578 extern bool bfd_elf64_swap_symbol_in
2579 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
2580 extern void bfd_elf64_swap_symbol_out
2581 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
2582 extern void bfd_elf64_swap_reloc_in
2583 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2584 extern void bfd_elf64_swap_reloc_out
2585 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2586 extern void bfd_elf64_swap_reloca_in
2587 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2588 extern void bfd_elf64_swap_reloca_out
2589 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2590 extern void bfd_elf64_swap_phdr_in
2591 (bfd
*, const Elf64_External_Phdr
*, Elf_Internal_Phdr
*);
2592 extern void bfd_elf64_swap_phdr_out
2593 (bfd
*, const Elf_Internal_Phdr
*, Elf64_External_Phdr
*);
2594 extern void bfd_elf64_swap_dyn_in
2595 (bfd
*, const void *, Elf_Internal_Dyn
*);
2596 extern void bfd_elf64_swap_dyn_out
2597 (bfd
*, const Elf_Internal_Dyn
*, void *);
2598 extern long bfd_elf64_slurp_symbol_table
2599 (bfd
*, asymbol
**, bool);
2600 extern bool bfd_elf64_write_shdrs_and_ehdr
2602 extern int bfd_elf64_write_out_phdrs
2603 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
2604 extern bool bfd_elf64_checksum_contents
2605 (bfd
* , void (*) (const void *, size_t, void *), void *);
2606 extern void bfd_elf64_write_relocs
2607 (bfd
*, asection
*, void *);
2608 extern bool bfd_elf64_slurp_reloc_table
2609 (bfd
*, asection
*, asymbol
**, bool);
2611 extern bool _bfd_elf_default_relocs_compatible
2612 (const bfd_target
*, const bfd_target
*);
2614 extern bool _bfd_elf_relocs_compatible
2615 (const bfd_target
*, const bfd_target
*);
2616 extern bool _bfd_elf_notice_as_needed
2617 (bfd
*, struct bfd_link_info
*, enum notice_asneeded_action
);
2619 extern struct bfd_link_hash_entry
*_bfd_elf_archive_symbol_lookup
2620 (bfd
*, struct bfd_link_info
*, const char *);
2621 extern bool bfd_elf_link_add_symbols
2622 (bfd
*, struct bfd_link_info
*);
2623 extern bool _bfd_elf_add_dynamic_entry
2624 (struct bfd_link_info
*, bfd_vma
, bfd_vma
);
2625 extern bool _bfd_elf_strip_zero_sized_dynamic_sections
2626 (struct bfd_link_info
*);
2627 extern int bfd_elf_add_dt_needed_tag
2628 (bfd
*, struct bfd_link_info
*);
2629 extern bool _bfd_elf_link_check_relocs
2630 (bfd
*, struct bfd_link_info
*);
2632 extern bool bfd_elf_link_record_dynamic_symbol
2633 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
2635 extern int bfd_elf_link_record_local_dynamic_symbol
2636 (struct bfd_link_info
*, bfd
*, long);
2638 extern bool _bfd_elf_close_and_cleanup
2641 extern bool _bfd_elf_common_definition
2642 (Elf_Internal_Sym
*);
2644 extern unsigned int _bfd_elf_common_section_index
2647 extern asection
*_bfd_elf_common_section
2650 extern bfd_vma _bfd_elf_default_got_elt_size
2651 (bfd
*, struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd
*,
2654 extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn
2655 (bfd
*, arelent
*, struct bfd_symbol
*, void *,
2656 asection
*, bfd
*, char **);
2658 extern bool bfd_elf_final_link
2659 (bfd
*, struct bfd_link_info
*);
2661 extern void _bfd_elf_gc_keep
2662 (struct bfd_link_info
*info
);
2664 extern bool bfd_elf_gc_mark_dynamic_ref_symbol
2665 (struct elf_link_hash_entry
*h
, void *inf
);
2667 extern bool bfd_elf_gc_sections
2668 (bfd
*, struct bfd_link_info
*);
2670 extern bool bfd_elf_gc_record_vtinherit
2671 (bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
);
2673 extern bool bfd_elf_gc_record_vtentry
2674 (bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
);
2676 extern asection
*_bfd_elf_gc_mark_hook
2677 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
2678 struct elf_link_hash_entry
*, Elf_Internal_Sym
*);
2680 extern asection
*_bfd_elf_gc_mark_rsec
2681 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
,
2682 struct elf_reloc_cookie
*, bool *);
2684 extern bool _bfd_elf_gc_mark_reloc
2685 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
,
2686 struct elf_reloc_cookie
*);
2688 extern bool _bfd_elf_gc_mark_fdes
2689 (struct bfd_link_info
*, asection
*, asection
*, elf_gc_mark_hook_fn
,
2690 struct elf_reloc_cookie
*);
2692 extern bool _bfd_elf_gc_mark
2693 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
);
2695 extern bool _bfd_elf_gc_mark_extra_sections
2696 (struct bfd_link_info
*, elf_gc_mark_hook_fn
);
2698 extern bool bfd_elf_gc_common_finalize_got_offsets
2699 (bfd
*, struct bfd_link_info
*);
2701 extern bool bfd_elf_gc_common_final_link
2702 (bfd
*, struct bfd_link_info
*);
2704 extern bool bfd_elf_reloc_symbol_deleted_p
2707 extern struct elf_segment_map
* _bfd_elf_make_dynamic_segment
2708 (bfd
*, asection
*);
2710 extern bool _bfd_elf_map_sections_to_segments
2711 (bfd
*, struct bfd_link_info
*);
2713 extern bool _bfd_elf_is_function_type (unsigned int);
2715 extern bfd_size_type
_bfd_elf_maybe_function_sym (const asymbol
*, asection
*,
2718 extern asection
*_bfd_elf_plt_get_reloc_section (bfd
*, const char *);
2720 extern int bfd_elf_get_default_section_type (flagword
);
2722 extern bool bfd_elf_lookup_section_flags
2723 (struct bfd_link_info
*, struct flag_info
*, asection
*);
2725 extern Elf_Internal_Phdr
* _bfd_elf_find_segment_containing_section
2726 (bfd
* abfd
, asection
* section
);
2728 /* PowerPC @tls opcode transform/validate. */
2729 extern unsigned int _bfd_elf_ppc_at_tls_transform
2730 (unsigned int, unsigned int);
2731 /* PowerPC @tprel opcode transform/validate. */
2732 extern unsigned int _bfd_elf_ppc_at_tprel_transform
2733 (unsigned int, unsigned int);
2734 /* PowerPC elf_object_p tweak. */
2735 extern bool _bfd_elf_ppc_set_arch (bfd
*);
2736 /* PowerPC .gnu.attributes handling common to both 32-bit and 64-bit. */
2737 extern bool _bfd_elf_ppc_merge_fp_attributes
2738 (bfd
*, struct bfd_link_info
*);
2740 /* Return an upper bound on the number of bytes required to store a
2741 copy of ABFD's program header table entries. Return -1 if an error
2742 occurs; bfd_get_error will return an appropriate code. */
2743 extern long bfd_get_elf_phdr_upper_bound
2746 /* Copy ABFD's program header table entries to *PHDRS. The entries
2747 will be stored as an array of Elf_Internal_Phdr structures, as
2748 defined in include/elf/internal.h. To find out how large the
2749 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
2751 Return the number of program header table entries read, or -1 if an
2752 error occurs; bfd_get_error will return an appropriate code. */
2753 extern int bfd_get_elf_phdrs
2754 (bfd
*abfd
, void *phdrs
);
2756 /* Exported interface for writing elf corefile notes. */
2757 extern char *elfcore_write_note
2758 (bfd
*, char *, int *, const char *, int, const void *, int);
2759 extern char *elfcore_write_prpsinfo
2760 (bfd
*, char *, int *, const char *, const char *);
2761 extern char *elfcore_write_prstatus
2762 (bfd
*, char *, int *, long, int, const void *);
2763 extern char * elfcore_write_pstatus
2764 (bfd
*, char *, int *, long, int, const void *);
2765 extern char *elfcore_write_prfpreg
2766 (bfd
*, char *, int *, const void *, int);
2767 extern char *elfcore_write_prxfpreg
2768 (bfd
*, char *, int *, const void *, int);
2769 extern char *elfcore_write_xstatereg
2770 (bfd
*, char *, int *, const void *, int);
2771 extern char *elfcore_write_ppc_vmx
2772 (bfd
*, char *, int *, const void *, int);
2773 extern char *elfcore_write_ppc_vsx
2774 (bfd
*, char *, int *, const void *, int);
2775 extern char *elfcore_write_ppc_tar
2776 (bfd
*, char *, int *, const void *, int);
2777 extern char *elfcore_write_ppc_ppr
2778 (bfd
*, char *, int *, const void *, int);
2779 extern char *elfcore_write_ppc_dscr
2780 (bfd
*, char *, int *, const void *, int);
2781 extern char *elfcore_write_ppc_ebb
2782 (bfd
*, char *, int *, const void *, int);
2783 extern char *elfcore_write_ppc_pmu
2784 (bfd
*, char *, int *, const void *, int);
2785 extern char *elfcore_write_ppc_tm_cgpr
2786 (bfd
*, char *, int *, const void *, int);
2787 extern char *elfcore_write_ppc_tm_cfpr
2788 (bfd
*, char *, int *, const void *, int);
2789 extern char *elfcore_write_ppc_tm_cvmx
2790 (bfd
*, char *, int *, const void *, int);
2791 extern char *elfcore_write_ppc_tm_cvsx
2792 (bfd
*, char *, int *, const void *, int);
2793 extern char *elfcore_write_ppc_tm_spr
2794 (bfd
*, char *, int *, const void *, int);
2795 extern char *elfcore_write_ppc_tm_ctar
2796 (bfd
*, char *, int *, const void *, int);
2797 extern char *elfcore_write_ppc_tm_cppr
2798 (bfd
*, char *, int *, const void *, int);
2799 extern char *elfcore_write_ppc_tm_cdscr
2800 (bfd
*, char *, int *, const void *, int);
2801 extern char *elfcore_write_s390_timer
2802 (bfd
*, char *, int *, const void *, int);
2803 extern char *elfcore_write_s390_todcmp
2804 (bfd
*, char *, int *, const void *, int);
2805 extern char *elfcore_write_s390_todpreg
2806 (bfd
*, char *, int *, const void *, int);
2807 extern char *elfcore_write_s390_ctrs
2808 (bfd
*, char *, int *, const void *, int);
2809 extern char *elfcore_write_s390_prefix
2810 (bfd
*, char *, int *, const void *, int);
2811 extern char *elfcore_write_s390_last_break
2812 (bfd
*, char *, int *, const void *, int);
2813 extern char *elfcore_write_s390_system_call
2814 (bfd
*, char *, int *, const void *, int);
2815 extern char *elfcore_write_s390_tdb
2816 (bfd
*, char *, int *, const void *, int);
2817 extern char *elfcore_write_s390_vxrs_low
2818 (bfd
*, char *, int *, const void *, int);
2819 extern char *elfcore_write_s390_vxrs_high
2820 (bfd
*, char *, int *, const void *, int);
2821 extern char *elfcore_write_s390_gs_cb
2822 (bfd
*, char *, int *, const void *, int);
2823 extern char *elfcore_write_s390_gs_bc
2824 (bfd
*, char *, int *, const void *, int);
2825 extern char *elfcore_write_arm_vfp
2826 (bfd
*, char *, int *, const void *, int);
2827 extern char *elfcore_write_aarch_tls
2828 (bfd
*, char *, int *, const void *, int);
2829 extern char *elfcore_write_aarch_hw_break
2830 (bfd
*, char *, int *, const void *, int);
2831 extern char *elfcore_write_aarch_hw_watch
2832 (bfd
*, char *, int *, const void *, int);
2833 extern char *elfcore_write_aarch_sve
2834 (bfd
*, char *, int *, const void *, int);
2835 extern char *elfcore_write_aarch_pauth
2836 (bfd
*, char *, int *, const void *, int);
2837 extern char *elfcore_write_aarch_mte
2838 (bfd
*, char *, int *, const void *, int);
2839 extern char *elfcore_write_arc_v2
2840 (bfd
*, char *, int *, const void *, int);
2841 extern char *elfcore_write_riscv_csr
2842 (bfd
*, char *, int *, const void *, int);
2843 extern char *elfcore_write_gdb_tdesc
2844 (bfd
*, char *, int *, const void *, int);
2845 extern char *elfcore_write_lwpstatus
2846 (bfd
*, char *, int *, long, int, const void *);
2847 extern char *elfcore_write_register_note
2848 (bfd
*, char *, int *, const char *, const void *, int);
2849 extern char *elfcore_write_file_note
2850 (bfd
*, char *, int *, const void*, int);
2851 extern char *elfcore_write_loongarch_cpucfg
2852 (bfd
*, char *, int *, const void*, int);
2853 extern char *elfcore_write_loongarch_lbt
2854 (bfd
*, char *, int *, const void*, int);
2855 extern char *elfcore_write_loongarch_lsx
2856 (bfd
*, char *, int *, const void*, int);
2857 extern char *elfcore_write_loongarch_lasx
2858 (bfd
*, char *, int *, const void*, int);
2860 /* Internal structure which holds information to be included in the
2861 PRPSINFO section of Linux core files.
2863 This is an "internal" structure in the sense that it should be used
2864 to pass information to BFD (via the `elfcore_write_linux_prpsinfo'
2865 function), so things like endianess shouldn't be an issue. This
2866 structure will eventually be converted in one of the
2867 `elf_external_linux_*' structures and written out to an output bfd
2868 by one of the functions declared below. */
2870 struct elf_internal_linux_prpsinfo
2872 char pr_state
; /* Numeric process state. */
2873 char pr_sname
; /* Char for pr_state. */
2874 char pr_zomb
; /* Zombie. */
2875 char pr_nice
; /* Nice val. */
2876 unsigned long pr_flag
; /* Flags. */
2877 unsigned int pr_uid
;
2878 unsigned int pr_gid
;
2879 int pr_pid
, pr_ppid
, pr_pgrp
, pr_sid
;
2880 char pr_fname
[16 + 1]; /* Filename of executable. */
2881 char pr_psargs
[80 + 1]; /* Initial part of arg list. */
2884 /* Linux/most 32-bit archs. */
2885 extern char *elfcore_write_linux_prpsinfo32
2886 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
2888 /* Linux/most 64-bit archs. */
2889 extern char *elfcore_write_linux_prpsinfo64
2890 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
2892 extern bfd
*_bfd_elf32_bfd_from_remote_memory
2893 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
2894 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, bfd_size_type
));
2895 extern bfd
*_bfd_elf64_bfd_from_remote_memory
2896 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
2897 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, bfd_size_type
));
2899 extern bfd_vma
bfd_elf_obj_attr_size (bfd
*);
2900 extern void bfd_elf_set_obj_attr_contents (bfd
*, bfd_byte
*, bfd_vma
);
2901 extern int bfd_elf_get_obj_attr_int (bfd
*, int, unsigned int);
2902 extern void bfd_elf_add_obj_attr_int (bfd
*, int, unsigned int, unsigned int);
2903 #define bfd_elf_add_proc_attr_int(BFD, TAG, VALUE) \
2904 bfd_elf_add_obj_attr_int ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2905 extern void bfd_elf_add_obj_attr_string (bfd
*, int, unsigned int, const char *);
2906 #define bfd_elf_add_proc_attr_string(BFD, TAG, VALUE) \
2907 bfd_elf_add_obj_attr_string ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2908 extern void bfd_elf_add_obj_attr_int_string (bfd
*, int, unsigned int,
2909 unsigned int, const char *);
2910 #define bfd_elf_add_proc_attr_int_string(BFD, TAG, INTVAL, STRVAL) \
2911 bfd_elf_add_obj_attr_int_string ((BFD), OBJ_ATTR_PROC, (TAG), \
2914 extern char *_bfd_elf_attr_strdup (bfd
*, const char *);
2915 extern void _bfd_elf_copy_obj_attributes (bfd
*, bfd
*);
2916 extern int _bfd_elf_obj_attrs_arg_type (bfd
*, int, unsigned int);
2917 extern void _bfd_elf_parse_attributes (bfd
*, Elf_Internal_Shdr
*);
2918 extern bool _bfd_elf_merge_object_attributes
2919 (bfd
*, struct bfd_link_info
*);
2920 extern bool _bfd_elf_merge_unknown_attribute_low (bfd
*, bfd
*, int);
2921 extern bool _bfd_elf_merge_unknown_attribute_list (bfd
*, bfd
*);
2922 extern Elf_Internal_Shdr
*_bfd_elf_single_rel_hdr (asection
*sec
);
2923 extern bool elf_read_notes (bfd
*, file_ptr
, bfd_size_type
, size_t);
2925 extern bool _bfd_elf_parse_gnu_properties
2926 (bfd
*, Elf_Internal_Note
*);
2927 extern elf_property
* _bfd_elf_get_property
2928 (bfd
*, unsigned int, unsigned int);
2929 extern bfd
*_bfd_elf_link_setup_gnu_properties
2930 (struct bfd_link_info
*);
2931 extern bfd_size_type _bfd_elf_convert_gnu_property_size
2933 extern bool _bfd_elf_convert_gnu_properties
2934 (bfd
*, asection
*, bfd
*, bfd_byte
**, bfd_size_type
*);
2936 /* The linker may need to keep track of the number of relocs that it
2937 decides to copy as dynamic relocs in check_relocs for each symbol.
2938 This is so that it can later discard them if they are found to be
2939 unnecessary. We can store the information in a field extending the
2940 regular ELF linker hash table. */
2942 struct elf_dyn_relocs
2944 struct elf_dyn_relocs
*next
;
2946 /* The input section of the reloc. */
2949 /* Total number of relocs copied for the input section. */
2950 bfd_size_type count
;
2952 /* Number of pc-relative relocs copied for the input section. */
2953 bfd_size_type pc_count
;
2956 extern bool _bfd_elf_create_ifunc_sections
2957 (bfd
*, struct bfd_link_info
*);
2958 extern bool _bfd_elf_allocate_ifunc_dyn_relocs
2959 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
2960 struct elf_dyn_relocs
**, unsigned int, unsigned int,
2961 unsigned int, bool);
2963 extern void elf_append_rela (bfd
*, asection
*, Elf_Internal_Rela
*);
2964 extern void elf_append_rel (bfd
*, asection
*, Elf_Internal_Rela
*);
2966 extern bfd_vma
elf64_r_info (bfd_vma
, bfd_vma
);
2967 extern bfd_vma
elf64_r_sym (bfd_vma
);
2968 extern bfd_vma
elf32_r_info (bfd_vma
, bfd_vma
);
2969 extern bfd_vma
elf32_r_sym (bfd_vma
);
2971 extern bool is_debuginfo_file (bfd
*);
2974 extern bool _bfd_elf_init_secondary_reloc_section
2975 (bfd
*, Elf_Internal_Shdr
*, const char *, unsigned int);
2976 extern bool _bfd_elf_slurp_secondary_reloc_section
2977 (bfd
*, asection
*, asymbol
**, bool);
2978 extern bool _bfd_elf_copy_special_section_fields
2979 (const bfd
*, bfd
*, const Elf_Internal_Shdr
*, Elf_Internal_Shdr
*);
2980 extern bool _bfd_elf_write_secondary_reloc_section
2981 (bfd
*, asection
*);
2982 extern unsigned int _bfd_elf_symbol_section_index
2983 (bfd
*, elf_symbol_type
*);
2985 extern asection
*_bfd_elf_readonly_dynrelocs
2986 (struct elf_link_hash_entry
*);
2987 extern bool _bfd_elf_maybe_set_textrel
2988 (struct elf_link_hash_entry
*, void *);
2990 extern bool _bfd_elf_add_dynamic_tags
2991 (bfd
*, struct bfd_link_info
*, bool);
2993 /* Large common section. */
2994 extern asection _bfd_elf_large_com_section
;
2996 /* Hash for local symbol with the first section id, ID, in the input
2997 file and the local symbol index, SYM. */
2998 #define ELF_LOCAL_SYMBOL_HASH(ID, SYM) \
2999 (((((ID) & 0xffU) << 24) | (((ID) & 0xff00) << 8)) \
3000 ^ (SYM) ^ (((ID) & 0xffff0000U) >> 16))
3002 /* This is the condition under which finish_dynamic_symbol will be called.
3003 If our finish_dynamic_symbol isn't called, we'll need to do something
3004 about initializing any .plt and .got entries in relocate_section. */
3005 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
3007 && ((SHARED) || !(H)->forced_local) \
3008 && ((H)->dynindx != -1 || (H)->forced_local))
3010 /* This macro is to avoid lots of duplicated code in the body
3011 of xxx_relocate_section() in the various elfxx-xxxx.c files. */
3012 #define RELOC_FOR_GLOBAL_SYMBOL(info, input_bfd, input_section, rel, \
3013 r_symndx, symtab_hdr, sym_hashes, \
3014 h, sec, relocation, \
3015 unresolved_reloc, warned, ignored) \
3018 /* It seems this can happen with erroneous or unsupported \
3019 input (mixing a.out and elf in an archive, for example.) */ \
3020 if (sym_hashes == NULL) \
3023 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; \
3025 if (info->wrap_hash != NULL \
3026 && (input_section->flags & SEC_DEBUGGING) != 0) \
3027 h = ((struct elf_link_hash_entry *) \
3028 unwrap_hash_lookup (info, input_bfd, &h->root)); \
3030 while (h->root.type == bfd_link_hash_indirect \
3031 || h->root.type == bfd_link_hash_warning) \
3032 h = (struct elf_link_hash_entry *) h->root.u.i.link; \
3036 unresolved_reloc = false; \
3038 if (h->root.type == bfd_link_hash_defined \
3039 || h->root.type == bfd_link_hash_defweak) \
3041 sec = h->root.u.def.section; \
3043 || sec->output_section == NULL) \
3044 /* Set a flag that will be cleared later if we find a \
3045 relocation value for this symbol. output_section \
3046 is typically NULL for symbols satisfied by a shared \
3048 unresolved_reloc = true; \
3050 relocation = (h->root.u.def.value \
3051 + sec->output_section->vma \
3052 + sec->output_offset); \
3054 else if (h->root.type == bfd_link_hash_undefweak) \
3056 else if (info->unresolved_syms_in_objects == RM_IGNORE \
3057 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) \
3059 else if (!bfd_link_relocatable (info)) \
3061 bool err = ((info->unresolved_syms_in_objects == RM_DIAGNOSE \
3062 && !info->warn_unresolved_syms) \
3063 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT); \
3064 (*info->callbacks->undefined_symbol) (info, \
3065 h->root.root.string, \
3068 rel->r_offset, err); \
3071 (void) unresolved_reloc; \
3077 /* This macro is to avoid lots of duplicated code in the body of the
3078 loop over relocations in xxx_relocate_section() in the various
3081 Handle relocations against symbols from removed linkonce sections,
3082 or sections discarded by a linker script. When doing a relocatable
3083 link, we remove such relocations. Otherwise, we just want the
3084 section contents zeroed and avoid any special processing. */
3085 #define RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
3086 rel, count, relend, \
3087 howto, index, contents) \
3090 _bfd_clear_contents (howto, input_bfd, input_section, \
3091 contents, rel[index].r_offset); \
3093 if (bfd_link_relocatable (info) \
3094 && (input_section->flags & SEC_DEBUGGING)) \
3096 /* Only remove relocations in debug sections since other \
3097 sections may require relocations. */ \
3098 Elf_Internal_Shdr *rel_hdr; \
3100 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
3102 /* Avoid empty output section. */ \
3103 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
3105 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
3106 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
3107 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
3109 memmove (rel, rel + count, \
3110 (relend - rel - count) * sizeof (*rel)); \
3112 input_section->reloc_count -= count; \
3119 for (i_ = 0; i_ < count; i_++) \
3121 rel[i_].r_info = 0; \
3122 rel[i_].r_addend = 0; \
3128 /* Will a symbol be bound to the definition within the shared
3129 library, if any. A unique symbol can never be bound locally. */
3130 #define SYMBOLIC_BIND(INFO, H) \
3131 (!(H)->unique_global \
3132 && ((INFO)->symbolic \
3133 || (H)->start_stop \
3134 || ((INFO)->dynamic && !(H)->dynamic)))
3136 /* Determine if a section contains CTF data, using its name. */
3138 bfd_section_is_ctf (const asection
*sec
)
3140 const char *name
= bfd_section_name (sec
);
3141 return startswith (name
, ".ctf") && (name
[4] == 0 || name
[4] == '.');
3147 #endif /* _LIBELF_H_ */