1 /* BFD back-end data structures for ELF files.
2 Copyright (C) 1992-2020 Free Software Foundation, Inc.
3 Written by Cygnus Support.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
25 #include "elf/common.h"
26 #include "elf/external.h"
27 #include "elf/internal.h"
34 /* The number of entries in a section is its size divided by the size
35 of a single entry. This is normally only applicable to reloc and
36 symbol table sections.
37 PR 9934: It is possible to have relocations that do not refer to
38 symbols, thus it is also possible to have a relocation section in
39 an object file, but no symbol table. */
40 #define NUM_SHDR_ENTRIES(shdr) ((shdr)->sh_entsize > 0 ? (shdr)->sh_size / (shdr)->sh_entsize : 0)
42 /* If size isn't specified as 64 or 32, NAME macro should fail. */
45 #define NAME(x, y) x ## 64 ## _ ## y
48 #define NAME(x, y) x ## 32 ## _ ## y
53 #define NAME(x, y) x ## NOSIZE ## _ ## y
56 #define ElfNAME(X) NAME(Elf,X)
57 #define elfNAME(X) NAME(elf,X)
59 /* Information held for an ELF symbol. The first field is the
60 corresponding asymbol. Every symbol is an ELF file is actually a
61 pointer to this structure, although it is often handled as a
62 pointer to an asymbol. */
68 /* ELF symbol information. */
69 Elf_Internal_Sym internal_elf_sym
;
70 /* Backend specific information. */
73 unsigned int hppa_arg_reloc
;
79 /* Version information. This is from an Elf_Internal_Versym
80 structure in a SHT_GNU_versym section. It is zero if there is no
81 version information. */
82 unsigned short version
;
86 struct elf_strtab_hash
;
92 bfd_signed_vma refcount
;
94 struct got_entry
*glist
;
95 struct plt_entry
*plist
;
98 struct elf_link_virtual_table_entry
100 /* Virtual table entry use information. This array is nominally of size
101 size/sizeof(target_void_pointer), though we have to be able to assume
102 and track a size while the symbol is still undefined. It is indexed
103 via offset/sizeof(target_void_pointer). */
107 /* Virtual table derivation info. */
108 struct elf_link_hash_entry
*parent
;
111 /* ELF symbol version. */
112 enum elf_symbol_version
120 /* ELF linker hash table entries. */
122 struct elf_link_hash_entry
124 struct bfd_link_hash_entry root
;
126 /* Symbol index in output file. This is initialized to -1. It is
127 set to -2 if the symbol is used by a reloc. It is set to -3 if
128 this symbol is defined in a discarded section. */
131 /* Symbol index as a dynamic symbol. Initialized to -1, and remains
132 -1 if this is not a dynamic symbol. */
133 /* ??? Note that this is consistently used as a synonym for tests
134 against whether we can perform various simplifying transformations
135 to the code. (E.g. changing a pc-relative jump to a PLT entry
136 into a pc-relative jump to the target function.) That test, which
137 is often relatively complex, and someplaces wrong or incomplete,
138 should really be replaced by a predicate in elflink.c.
140 End result: this field -1 does not indicate that the symbol is
141 not in the dynamic symbol table, but rather that the symbol is
142 not visible outside this DSO. */
145 /* If this symbol requires an entry in the global offset table, the
146 processor specific backend uses this field to track usage and
147 final offset. Two schemes are supported: The first assumes that
148 a symbol may only have one GOT entry, and uses REFCOUNT until
149 size_dynamic_sections, at which point the contents of the .got is
150 fixed. Afterward, if OFFSET is -1, then the symbol does not
151 require a global offset table entry. The second scheme allows
152 multiple GOT entries per symbol, managed via a linked list
153 pointed to by GLIST. */
154 union gotplt_union got
;
156 /* Same, but tracks a procedure linkage table entry. */
157 union gotplt_union plt
;
159 /* Symbol size. NB: All fields starting from here are cleared by
160 _bfd_elf_link_hash_newfunc. */
163 /* Track dynamic relocs copied for this symbol. */
164 struct elf_dyn_relocs
*dyn_relocs
;
166 /* Symbol type (STT_NOTYPE, STT_OBJECT, etc.). */
167 unsigned int type
: 8;
169 /* Symbol st_other value, symbol visibility. */
170 unsigned int other
: 8;
172 /* The symbol's st_target_internal value (see Elf_Internal_Sym). */
173 unsigned int target_internal
: 8;
175 /* Symbol is referenced by a non-shared object (other than the object
176 in which it is defined). */
177 unsigned int ref_regular
: 1;
178 /* Symbol is defined by a non-shared object. */
179 unsigned int def_regular
: 1;
180 /* Symbol is referenced by a shared object. */
181 unsigned int ref_dynamic
: 1;
182 /* Symbol is defined by a shared object. */
183 unsigned int def_dynamic
: 1;
184 /* Symbol has a non-weak reference from a non-shared object (other than
185 the object in which it is defined). */
186 unsigned int ref_regular_nonweak
: 1;
187 /* Dynamic symbol has been adjustd. */
188 unsigned int dynamic_adjusted
: 1;
189 /* Symbol needs a copy reloc. */
190 unsigned int needs_copy
: 1;
191 /* Symbol needs a procedure linkage table entry. */
192 unsigned int needs_plt
: 1;
193 /* Symbol appears in a non-ELF input file. */
194 unsigned int non_elf
: 1;
195 /* Symbol version information. */
196 ENUM_BITFIELD (elf_symbol_version
) versioned
: 2;
197 /* Symbol was forced to local scope due to a version script file. */
198 unsigned int forced_local
: 1;
199 /* Symbol was forced to be dynamic due to a version script file. */
200 unsigned int dynamic
: 1;
201 /* Symbol was marked during garbage collection. */
202 unsigned int mark
: 1;
203 /* Symbol is referenced by a non-GOT/non-PLT relocation. This is
204 not currently set by all the backends. */
205 unsigned int non_got_ref
: 1;
206 /* Symbol has a definition in a shared object.
207 FIXME: There is no real need for this field if def_dynamic is never
208 cleared and all places that test def_dynamic also test def_regular. */
209 unsigned int dynamic_def
: 1;
210 /* Symbol has a non-weak reference from a shared object. */
211 unsigned int ref_dynamic_nonweak
: 1;
212 /* Symbol is referenced with a relocation where C/C++ pointer equality
214 unsigned int pointer_equality_needed
: 1;
215 /* Symbol is a unique global symbol. */
216 unsigned int unique_global
: 1;
217 /* Symbol is defined by a shared library with non-default visibility
218 in a read/write section. */
219 unsigned int protected_def
: 1;
220 /* Symbol is __start_SECNAME or __stop_SECNAME to mark section
222 unsigned int start_stop
: 1;
223 /* Symbol is or was a weak defined symbol from a dynamic object with
224 a strong defined symbol alias. U.ALIAS points to a list of aliases,
225 the definition having is_weakalias clear. */
226 unsigned int is_weakalias
: 1;
228 /* String table index in .dynstr if this is a dynamic symbol. */
229 unsigned long dynstr_index
;
233 /* Points to a circular list of non-function symbol aliases. */
234 struct elf_link_hash_entry
*alias
;
236 /* Hash value of the name computed using the ELF hash function.
237 Used part way through size_dynamic_sections, after we've finished
239 unsigned long elf_hash_value
;
242 /* Version information. */
245 /* This field is used for a symbol which is not defined in a
246 regular object. It points to the version information read in
247 from the dynamic object. */
248 Elf_Internal_Verdef
*verdef
;
249 /* This field is used for a symbol which is defined in a regular
250 object. It is set up in size_dynamic_sections. It points to
251 the version information we should write out for this symbol. */
252 struct bfd_elf_version_tree
*vertree
;
257 /* For __start_SECNAME and __stop_SECNAME symbols, record the first
258 input section whose section name is SECNAME. */
259 asection
*start_stop_section
;
261 /* Vtable information. */
262 struct elf_link_virtual_table_entry
*vtable
;
266 /* Return the strong definition for a weak symbol with aliases. */
268 static inline struct elf_link_hash_entry
*
269 weakdef (struct elf_link_hash_entry
*h
)
271 while (h
->is_weakalias
)
276 /* Will references to this symbol always reference the symbol
278 #define SYMBOL_REFERENCES_LOCAL(INFO, H) \
279 _bfd_elf_symbol_refs_local_p (H, INFO, 0)
281 /* Will _calls_ to this symbol always call the version in this object? */
282 #define SYMBOL_CALLS_LOCAL(INFO, H) \
283 _bfd_elf_symbol_refs_local_p (H, INFO, 1)
285 /* Whether an undefined weak symbol should resolve to its link-time
286 value, even in PIC or PIE objects. */
287 #define UNDEFWEAK_NO_DYNAMIC_RELOC(INFO, H) \
288 ((H)->root.type == bfd_link_hash_undefweak \
289 && (ELF_ST_VISIBILITY ((H)->other) != STV_DEFAULT \
290 || (INFO)->dynamic_undefined_weak == 0))
292 /* Common symbols that are turned into definitions don't have the
293 DEF_REGULAR flag set, so they might appear to be undefined.
294 Symbols defined in linker scripts also don't have DEF_REGULAR set. */
295 #define ELF_COMMON_DEF_P(H) \
297 && !(H)->def_dynamic \
298 && (H)->root.type == bfd_link_hash_defined)
300 /* Records local symbols to be emitted in the dynamic symbol table. */
302 struct elf_link_local_dynamic_entry
304 struct elf_link_local_dynamic_entry
*next
;
306 /* The input bfd this symbol came from. */
309 /* The index of the local symbol being copied. */
312 /* The index in the outgoing dynamic symbol table. */
315 /* A copy of the input symbol. */
316 Elf_Internal_Sym isym
;
319 struct elf_link_loaded_list
321 struct elf_link_loaded_list
*next
;
325 /* Structures used by the eh_frame optimization code. */
330 /* If REMOVED == 1, this is the CIE that the FDE originally used.
331 The CIE belongs to the same .eh_frame input section as the FDE.
333 If REMOVED == 0, this is the CIE that we have chosen to use for
334 the output FDE. The CIE's REMOVED field is also 0, but the CIE
335 might belong to a different .eh_frame input section from the FDE.
337 May be NULL to signify that the FDE should be discarded. */
338 struct eh_cie_fde
*cie_inf
;
339 struct eh_cie_fde
*next_for_section
;
342 /* CIEs have three states:
344 - REMOVED && !MERGED: Slated for removal because we haven't yet
345 proven that an FDE needs it. FULL_CIE, if nonnull, points to
346 more detailed information about the CIE.
348 - REMOVED && MERGED: We have merged this CIE with MERGED_WITH,
349 which may not belong to the same input section.
351 - !REMOVED: We have decided to keep this CIE. SEC is the
352 .eh_frame input section that contains the CIE. */
354 struct cie
*full_cie
;
355 struct eh_cie_fde
*merged_with
;
359 /* The offset of the personality data from the start of the CIE,
360 or 0 if the CIE doesn't have any. */
361 unsigned int personality_offset
: 8;
363 /* Length of augmentation. aug_str_len is the length of the
364 string including null terminator. aug_data_len is the length
365 of the rest up to the initial insns. */
366 unsigned int aug_str_len
: 3;
367 unsigned int aug_data_len
: 5;
369 /* True if we have marked relocations associated with this CIE. */
370 unsigned int gc_mark
: 1;
372 /* True if we have decided to turn an absolute LSDA encoding into
373 a PC-relative one. */
374 unsigned int make_lsda_relative
: 1;
376 /* True if we have decided to turn an absolute personality
377 encoding into a PC-relative one. */
378 unsigned int make_per_encoding_relative
: 1;
380 /* True if the CIE contains personality data and if that
381 data uses a PC-relative encoding. Always true when
382 make_per_encoding_relative is. */
383 unsigned int per_encoding_relative
: 1;
385 /* True if the CIE contains personality data aligned to a
386 multiple of eight bytes. */
387 unsigned int per_encoding_aligned8
: 1;
389 /* True if we need to add an 'R' (FDE encoding) entry to the
390 CIE's augmentation data. */
391 unsigned int add_fde_encoding
: 1;
393 /* True if we have merged this CIE with another. */
394 unsigned int merged
: 1;
397 unsigned int pad1
: 9;
400 unsigned int reloc_index
;
403 unsigned int new_offset
;
404 unsigned int fde_encoding
: 8;
405 unsigned int lsda_encoding
: 8;
406 unsigned int lsda_offset
: 8;
408 /* True if this entry represents a CIE, false if it represents an FDE. */
409 unsigned int cie
: 1;
411 /* True if this entry is currently marked for removal. */
412 unsigned int removed
: 1;
414 /* True if we need to add a 'z' (augmentation size) entry to the CIE's
415 augmentation data, and an associated byte to each of the CIE's FDEs. */
416 unsigned int add_augmentation_size
: 1;
418 /* True if we have decided to convert absolute FDE relocations into
419 relative ones. This applies to the first relocation in the FDE,
420 which is against the code that the FDE describes. */
421 unsigned int make_relative
: 1;
424 unsigned int pad1
: 4;
426 unsigned int *set_loc
;
429 struct eh_frame_sec_info
433 struct eh_cie_fde entry
[1];
436 struct eh_frame_array_ent
445 #define DWARF2_EH_HDR 1
446 #define COMPACT_EH_HDR 2
448 /* Endian-neutral code indicating that a function cannot be unwound. */
449 #define COMPACT_EH_CANT_UNWIND_OPCODE 0x015d5d01
451 struct dwarf_eh_frame_hdr_info
454 unsigned int fde_count
;
455 /* TRUE if .eh_frame_hdr should contain the sorted search table.
456 We build it if we successfully read all .eh_frame input sections
457 and recognize them. */
459 struct eh_frame_array_ent
*array
;
462 struct compact_eh_frame_hdr_info
464 unsigned int allocated_entries
;
465 /* eh_frame_entry fragments. */
469 struct eh_frame_hdr_info
472 unsigned int array_count
;
473 bfd_boolean frame_hdr_is_compact
;
476 struct dwarf_eh_frame_hdr_info dwarf
;
477 struct compact_eh_frame_hdr_info compact
;
482 /* Enum used to identify target specific extensions to the elf_obj_tdata
483 and elf_link_hash_table structures. Note the enums deliberately start
484 from 1 so that we can detect an uninitialized field. The generic value
485 is last so that additions to this enum do not need to modify more than
489 AARCH64_ELF_DATA
= 1,
529 struct elf_sym_strtab
531 Elf_Internal_Sym sym
;
532 unsigned long dest_index
;
533 unsigned long destshndx_index
;
536 struct bfd_link_needed_list
538 struct bfd_link_needed_list
*next
;
546 is_symbian
, /* Symbian OS. */
547 is_solaris
, /* Solaris. */
548 is_vxworks
, /* VxWorks. */
549 is_nacl
/* Native Client. */
552 /* ELF linker hash table. */
554 struct elf_link_hash_table
556 struct bfd_link_hash_table root
;
558 /* An identifier used to distinguish different target
559 specific extensions to this structure. */
560 enum elf_target_id hash_table_id
;
562 /* Whether we have created the special dynamic sections required
563 when linking against or generating a shared object. */
564 bfd_boolean dynamic_sections_created
;
566 /* Whether dynamic relocations are present. */
567 bfd_boolean dynamic_relocs
;
569 /* True if this target has relocatable executables, so needs dynamic
571 bfd_boolean is_relocatable_executable
;
573 /* TRUE if there are IFUNC resolvers. */
574 bfd_boolean ifunc_resolvers
;
576 /* TRUE if DT_PLTGOT is a required dynamic tag. */
577 bfd_boolean dt_pltgot_required
;
579 /* TRUE if DT_JMPREL is a required dynamic tag. */
580 bfd_boolean dt_jmprel_required
;
582 /* The BFD used to hold special sections created by the linker.
583 This will be the first BFD found which requires these sections to
587 /* The value to use when initialising got.refcount/offset and
588 plt.refcount/offset in an elf_link_hash_entry. Set to zero when
589 the values are refcounts. Set to init_got_offset/init_plt_offset
590 in size_dynamic_sections when the values may be offsets. */
591 union gotplt_union init_got_refcount
;
592 union gotplt_union init_plt_refcount
;
594 /* The value to use for got.refcount/offset and plt.refcount/offset
595 when the values may be offsets. Normally (bfd_vma) -1. */
596 union gotplt_union init_got_offset
;
597 union gotplt_union init_plt_offset
;
599 /* The number of symbols found in the link which is intended for the
600 mandatory DT_SYMTAB tag (.dynsym section) in .dynamic section. */
601 bfd_size_type dynsymcount
;
602 bfd_size_type local_dynsymcount
;
604 /* The string table of dynamic symbols, which becomes the .dynstr
606 struct elf_strtab_hash
*dynstr
;
608 /* The number of symbol strings found in the link which must be put
609 into the .strtab section. */
610 bfd_size_type strtabcount
;
612 /* The array size of the symbol string table, which becomes the
614 bfd_size_type strtabsize
;
616 /* The array of strings, which becomes the .strtab section. */
617 struct elf_sym_strtab
*strtab
;
619 /* The number of buckets in the hash table in the .hash section.
620 This is based on the number of dynamic symbols. */
621 bfd_size_type bucketcount
;
623 /* A linked list of DT_NEEDED names found in dynamic objects
624 included in the link. */
625 struct bfd_link_needed_list
*needed
;
627 /* Sections in the output bfd that provides a section symbol
628 to be used by relocations emitted against local symbols.
629 Most targets will not use data_index_section. */
630 asection
*text_index_section
;
631 asection
*data_index_section
;
633 /* The _GLOBAL_OFFSET_TABLE_ symbol. */
634 struct elf_link_hash_entry
*hgot
;
636 /* The _PROCEDURE_LINKAGE_TABLE_ symbol. */
637 struct elf_link_hash_entry
*hplt
;
639 /* The _DYNAMIC symbol. */
640 struct elf_link_hash_entry
*hdynamic
;
642 /* A pointer to information used to merge SEC_MERGE sections. */
645 /* Used to link stabs in sections. */
646 struct stab_info stab_info
;
648 /* Used by eh_frame code when editing .eh_frame. */
649 struct eh_frame_hdr_info eh_info
;
651 /* A linked list of local symbols to be added to .dynsym. */
652 struct elf_link_local_dynamic_entry
*dynlocal
;
654 /* A linked list of DT_RPATH/DT_RUNPATH names found in dynamic
655 objects included in the link. */
656 struct bfd_link_needed_list
*runpath
;
658 /* Cached first output tls section and size of PT_TLS segment. */
660 bfd_size_type tls_size
; /* Bytes. */
662 /* The offset into splt of the PLT entry for the TLS descriptor
663 resolver. Special values are 0, if not necessary (or not found
664 to be necessary yet), and -1 if needed but not determined
668 /* The GOT offset for the lazy trampoline. Communicated to the
669 loader via DT_TLSDESC_GOT. The magic value (bfd_vma) -1
670 indicates an offset is not allocated. */
673 /* Target OS for linker output. */
674 enum elf_target_os target_os
;
676 /* A linked list of dynamic BFD's loaded in the link. */
677 struct elf_link_loaded_list
*dyn_loaded
;
679 /* Short-cuts to get to dynamic linker sections. */
688 asection
*sreldynrelro
;
696 /* Look up an entry in an ELF linker hash table. */
698 #define elf_link_hash_lookup(table, string, create, copy, follow) \
699 ((struct elf_link_hash_entry *) \
700 bfd_link_hash_lookup (&(table)->root, (string), (create), \
703 /* Traverse an ELF linker hash table. */
705 #define elf_link_hash_traverse(table, func, info) \
706 (bfd_link_hash_traverse \
708 (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func), \
711 /* Get the ELF linker hash table from a link_info structure. */
713 #define elf_hash_table(p) ((struct elf_link_hash_table *) ((p)->hash))
715 #define elf_hash_table_id(table) ((table) -> hash_table_id)
717 /* Returns TRUE if the hash table is a struct elf_link_hash_table. */
718 #define is_elf_hash_table(htab) \
719 (((struct bfd_link_hash_table *) (htab))->type == bfd_link_elf_hash_table)
721 /* Used by bfd_sym_from_r_symndx to cache a small number of local
723 #define LOCAL_SYM_CACHE_SIZE 32
727 unsigned long indx
[LOCAL_SYM_CACHE_SIZE
];
728 Elf_Internal_Sym sym
[LOCAL_SYM_CACHE_SIZE
];
731 /* Constant information held for an ELF backend. */
733 struct elf_size_info
{
734 unsigned char sizeof_ehdr
, sizeof_phdr
, sizeof_shdr
;
735 unsigned char sizeof_rel
, sizeof_rela
, sizeof_sym
, sizeof_dyn
, sizeof_note
;
737 /* The size of entries in the .hash section. */
738 unsigned char sizeof_hash_entry
;
740 /* The number of internal relocations to allocate per external
742 unsigned char int_rels_per_ext_rel
;
743 /* We use some fixed size arrays. This should be large enough to
744 handle all back-ends. */
745 #define MAX_INT_RELS_PER_EXT_REL 3
747 unsigned char arch_size
, log_file_align
;
748 unsigned char elfclass
, ev_current
;
749 int (*write_out_phdrs
)
750 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
752 (*write_shdrs_and_ehdr
) (bfd
*);
753 bfd_boolean (*checksum_contents
)
754 (bfd
* , void (*) (const void *, size_t, void *), void *);
756 (bfd
*, asection
*, void *);
757 bfd_boolean (*swap_symbol_in
)
758 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
759 void (*swap_symbol_out
)
760 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
761 bfd_boolean (*slurp_reloc_table
)
762 (bfd
*, asection
*, asymbol
**, bfd_boolean
);
763 long (*slurp_symbol_table
)
764 (bfd
*, asymbol
**, bfd_boolean
);
766 (bfd
*, const void *, Elf_Internal_Dyn
*);
768 (bfd
*, const Elf_Internal_Dyn
*, void *);
770 /* This function is called to swap in a REL relocation. If an
771 external relocation corresponds to more than one internal
772 relocation, then all relocations are swapped in at once. */
773 void (*swap_reloc_in
)
774 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
776 /* This function is called to swap out a REL relocation. */
777 void (*swap_reloc_out
)
778 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
780 /* This function is called to swap in a RELA relocation. If an
781 external relocation corresponds to more than one internal
782 relocation, then all relocations are swapped in at once. */
783 void (*swap_reloca_in
)
784 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
786 /* This function is called to swap out a RELA relocation. */
787 void (*swap_reloca_out
)
788 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
791 #define elf_symbol_from(ABFD,S) \
792 (((S)->the_bfd != NULL \
793 && (S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \
794 && (S)->the_bfd->tdata.elf_obj_data != 0) \
795 ? (elf_symbol_type *) (S) \
798 enum elf_reloc_type_class
{
800 reloc_class_relative
,
806 struct elf_reloc_cookie
808 Elf_Internal_Rela
*rels
, *rel
, *relend
;
809 Elf_Internal_Sym
*locsyms
;
813 struct elf_link_hash_entry
**sym_hashes
;
815 bfd_boolean bad_symtab
;
818 /* The level of IRIX compatibility we're striving for. */
826 /* Mapping of ELF section names and types. */
827 struct bfd_elf_special_section
830 unsigned int prefix_length
;
831 /* 0 means name must match PREFIX exactly.
832 -1 means name must start with PREFIX followed by an arbitrary string.
833 -2 means name must match PREFIX exactly or consist of PREFIX followed
834 by a dot then anything.
835 > 0 means name must start with the first PREFIX_LENGTH chars of
836 PREFIX and finish with the last SUFFIX_LENGTH chars of PREFIX. */
837 signed int suffix_length
;
842 enum action_discarded
848 typedef asection
* (*elf_gc_mark_hook_fn
)
849 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
850 struct elf_link_hash_entry
*, Elf_Internal_Sym
*);
852 enum elf_property_kind
854 /* A new property. */
855 property_unknown
= 0,
856 /* A property ignored by backend. */
858 /* A corrupt property reported by backend. */
860 /* A property should be removed due to property merge. */
862 /* A property which is a number. */
866 typedef struct elf_property
868 unsigned int pr_type
;
869 unsigned int pr_datasz
;
872 /* For property_number, this is a number. */
874 /* Add a new one if elf_property_kind is updated. */
876 enum elf_property_kind pr_kind
;
879 typedef struct elf_property_list
881 struct elf_property_list
*next
;
882 struct elf_property property
;
885 struct bfd_elf_section_reloc_data
;
887 struct elf_backend_data
889 /* The architecture for this backend. */
890 enum bfd_architecture arch
;
892 /* An identifier used to distinguish different target specific
893 extensions to elf_obj_tdata and elf_link_hash_table structures. */
894 enum elf_target_id target_id
;
897 enum elf_target_os target_os
;
899 /* The ELF machine code (EM_xxxx) for this backend. */
900 int elf_machine_code
;
905 /* The maximum page size for this backend. */
908 /* The minimum page size for this backend. An input object will not be
909 considered page aligned unless its sections are correctly aligned for
910 pages at least this large. May be smaller than maxpagesize. */
913 /* The common page size for this backend. */
914 bfd_vma commonpagesize
;
916 /* The value of commonpagesize to use when -z relro for this backend. */
917 bfd_vma relropagesize
;
919 /* The BFD flags applied to sections created for dynamic linking. */
920 flagword dynamic_sec_flags
;
922 /* Architecture-specific data for this backend.
923 This is actually a pointer to some type like struct elf_ARCH_data. */
924 const void *arch_data
;
926 /* A function to translate an ELF RELA relocation to a BFD arelent
927 structure. Returns TRUE upon success, FALSE otherwise. */
928 bfd_boolean (*elf_info_to_howto
)
929 (bfd
*, arelent
*, Elf_Internal_Rela
*);
931 /* A function to translate an ELF REL relocation to a BFD arelent
932 structure. Returns TRUE upon success, FALSE otherwise. */
933 bfd_boolean (*elf_info_to_howto_rel
)
934 (bfd
*, arelent
*, Elf_Internal_Rela
*);
936 /* A function to determine whether a symbol is global when
937 partitioning the symbol table into local and global symbols.
938 This should be NULL for most targets, in which case the correct
939 thing will be done. MIPS ELF, at least on the Irix 5, has
940 special requirements. */
941 bfd_boolean (*elf_backend_sym_is_global
)
944 /* The remaining functions are hooks which are called only if they
947 /* A function to permit a backend specific check on whether a
948 particular BFD format is relevant for an object file, and to
949 permit the backend to set any global information it wishes. When
950 this is called elf_elfheader is set, but anything else should be
951 used with caution. If this returns FALSE, the check_format
952 routine will return a bfd_error_wrong_format error. */
953 bfd_boolean (*elf_backend_object_p
)
956 /* A function to do additional symbol processing when reading the
957 ELF symbol table. This is where any processor-specific special
958 section indices are handled. */
959 void (*elf_backend_symbol_processing
)
962 /* A function to do additional symbol processing after reading the
963 entire ELF symbol table. */
964 bfd_boolean (*elf_backend_symbol_table_processing
)
965 (bfd
*, elf_symbol_type
*, unsigned int);
967 /* A function to set the type of the info field. Processor-specific
968 types should be handled here. */
969 int (*elf_backend_get_symbol_type
)
970 (Elf_Internal_Sym
*, int);
972 /* A function to return the linker hash table entry of a symbol that
973 might be satisfied by an archive symbol. */
974 struct elf_link_hash_entry
* (*elf_backend_archive_symbol_lookup
)
975 (bfd
*, struct bfd_link_info
*, const char *);
977 /* Return true if local section symbols should have a non-null st_name.
978 NULL implies false. */
979 bfd_boolean (*elf_backend_name_local_section_symbols
)
982 /* A function to do additional processing on the ELF section header
983 just before writing it out. This is used to set the flags and
984 type fields for some sections, or to actually write out data for
986 bfd_boolean (*elf_backend_section_processing
)
987 (bfd
*, Elf_Internal_Shdr
*);
989 /* A function to handle unusual section types when creating BFD
990 sections from ELF sections. */
991 bfd_boolean (*elf_backend_section_from_shdr
)
992 (bfd
*, Elf_Internal_Shdr
*, const char *, int);
994 /* A function to convert machine dependent ELF section header flags to
995 BFD internal section header flags. */
996 bfd_boolean (*elf_backend_section_flags
)
997 (const Elf_Internal_Shdr
*);
999 /* A function that returns a struct containing ELF section flags and
1000 type for the given BFD section. */
1001 const struct bfd_elf_special_section
* (*get_sec_type_attr
)
1002 (bfd
*, asection
*);
1004 /* A function to handle unusual program segment types when creating BFD
1005 sections from ELF program segments. */
1006 bfd_boolean (*elf_backend_section_from_phdr
)
1007 (bfd
*, Elf_Internal_Phdr
*, int, const char *);
1009 /* A function to set up the ELF section header for a BFD section in
1010 preparation for writing it out. This is where the flags and type
1011 fields are set for unusual sections. */
1012 bfd_boolean (*elf_backend_fake_sections
)
1013 (bfd
*, Elf_Internal_Shdr
*, asection
*);
1015 /* A function to get the ELF section index for a BFD section. If
1016 this returns TRUE, the section was found. If it is a normal ELF
1017 section, *RETVAL should be left unchanged. If it is not a normal
1018 ELF section *RETVAL should be set to the SHN_xxxx index. */
1019 bfd_boolean (*elf_backend_section_from_bfd_section
)
1020 (bfd
*, asection
*, int *retval
);
1022 /* If this field is not NULL, it is called by the add_symbols phase
1023 of a link just before adding a symbol to the global linker hash
1024 table. It may modify any of the fields as it wishes. If *NAME
1025 is set to NULL, the symbol will be skipped rather than being
1026 added to the hash table. This function is responsible for
1027 handling all processor dependent symbol bindings and section
1028 indices, and must set at least *FLAGS and *SEC for each processor
1029 dependent case; failure to do so will cause a link error. */
1030 bfd_boolean (*elf_add_symbol_hook
)
1031 (bfd
*abfd
, struct bfd_link_info
*info
, Elf_Internal_Sym
*,
1032 const char **name
, flagword
*flags
, asection
**sec
, bfd_vma
*value
);
1034 /* If this field is not NULL, it is called by the elf_link_output_sym
1035 phase of a link for each symbol which will appear in the object file.
1036 On error, this function returns 0. 1 is returned when the symbol
1037 should be output, 2 is returned when the symbol should be discarded. */
1038 int (*elf_backend_link_output_symbol_hook
)
1039 (struct bfd_link_info
*info
, const char *, Elf_Internal_Sym
*,
1040 asection
*, struct elf_link_hash_entry
*);
1042 /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend
1043 linker the first time it encounters a dynamic object in the link.
1044 This function must create any sections required for dynamic
1045 linking. The ABFD argument is a dynamic object. The .interp,
1046 .dynamic, .dynsym, .dynstr, and .hash functions have already been
1047 created, and this function may modify the section flags if
1048 desired. This function will normally create the .got and .plt
1049 sections, but different backends have different requirements. */
1050 bfd_boolean (*elf_backend_create_dynamic_sections
)
1051 (bfd
*abfd
, struct bfd_link_info
*info
);
1053 /* When creating a shared library, determine whether to omit the
1054 dynamic symbol for the section. */
1055 bfd_boolean (*elf_backend_omit_section_dynsym
)
1056 (bfd
*output_bfd
, struct bfd_link_info
*info
, asection
*osec
);
1058 /* Return TRUE if relocations of targets are compatible to the extent
1059 that CHECK_RELOCS will properly process them. PR 4424. */
1060 bfd_boolean (*relocs_compatible
) (const bfd_target
*, const bfd_target
*);
1062 /* The CHECK_RELOCS function is called by the add_symbols phase of
1063 the ELF backend linker. It is called once for each section with
1064 relocs of an object file, just after the symbols for the object
1065 file have been added to the global linker hash table. The
1066 function must look through the relocs and do any special handling
1067 required. This generally means allocating space in the global
1068 offset table, and perhaps allocating space for a reloc. The
1069 relocs are always passed as Rela structures; if the section
1070 actually uses Rel structures, the r_addend field will always be
1072 bfd_boolean (*check_relocs
)
1073 (bfd
*abfd
, struct bfd_link_info
*info
, asection
*o
,
1074 const Elf_Internal_Rela
*relocs
);
1076 /* The CHECK_DIRECTIVES function is called once per input file by
1077 the add_symbols phase of the ELF backend linker. The function
1078 must inspect the bfd and create any additional symbols according
1079 to any custom directives in the bfd. */
1080 bfd_boolean (*check_directives
)
1081 (bfd
*abfd
, struct bfd_link_info
*info
);
1083 /* The NOTICE_AS_NEEDED function is called as the linker is about to
1084 handle an as-needed lib (ACT = notice_as_needed), and after the
1085 linker has decided to keep the lib (ACT = notice_needed) or when
1086 the lib is not needed (ACT = notice_not_needed). */
1087 bfd_boolean (*notice_as_needed
)
1088 (bfd
*abfd
, struct bfd_link_info
*info
, enum notice_asneeded_action act
);
1090 /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
1091 linker for every symbol which is defined by a dynamic object and
1092 referenced by a regular object. This is called after all the
1093 input files have been seen, but before the SIZE_DYNAMIC_SECTIONS
1094 function has been called. The hash table entry should be
1095 bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be
1096 defined in a section from a dynamic object. Dynamic object
1097 sections are not included in the final link, and this function is
1098 responsible for changing the value to something which the rest of
1099 the link can deal with. This will normally involve adding an
1100 entry to the .plt or .got or some such section, and setting the
1101 symbol to point to that. */
1102 bfd_boolean (*elf_backend_adjust_dynamic_symbol
)
1103 (struct bfd_link_info
*info
, struct elf_link_hash_entry
*h
);
1105 /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker
1106 after all the linker input files have been seen but before the
1107 section sizes have been set. This is called after
1108 ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS. */
1109 bfd_boolean (*elf_backend_always_size_sections
)
1110 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1112 /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend
1113 linker after all the linker input files have been seen but before
1114 the sections sizes have been set. This is called after
1115 ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols.
1116 It is only called when linking against a dynamic object. It must
1117 set the sizes of the dynamic sections, and may fill in their
1118 contents as well. The generic ELF linker can handle the .dynsym,
1119 .dynstr and .hash sections. This function must handle the
1120 .interp section and any sections created by the
1121 CREATE_DYNAMIC_SECTIONS entry point. */
1122 bfd_boolean (*elf_backend_size_dynamic_sections
)
1123 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1125 /* The STRIP_ZERO_SIZED_DYNAMIC_SECTIONS function is called by the
1126 ELF backend linker to strip zero-sized dynamic sections after
1127 the section sizes have been set. */
1128 bfd_boolean (*elf_backend_strip_zero_sized_dynamic_sections
)
1129 (struct bfd_link_info
*info
);
1131 /* Set TEXT_INDEX_SECTION and DATA_INDEX_SECTION, the output sections
1132 we keep to use as a base for relocs and symbols. */
1133 void (*elf_backend_init_index_section
)
1134 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1136 /* The RELOCATE_SECTION function is called by the ELF backend linker
1137 to handle the relocations for a section.
1139 The relocs are always passed as Rela structures; if the section
1140 actually uses Rel structures, the r_addend field will always be
1143 This function is responsible for adjust the section contents as
1144 necessary, and (if using Rela relocs and generating a
1145 relocatable output file) adjusting the reloc addend as
1148 This function does not have to worry about setting the reloc
1149 address or the reloc symbol index.
1151 LOCAL_SYMS is a pointer to the swapped in local symbols.
1153 LOCAL_SECTIONS is an array giving the section in the input file
1154 corresponding to the st_shndx field of each local symbol.
1156 The global hash table entry for the global symbols can be found
1157 via elf_sym_hashes (input_bfd).
1159 When generating relocatable output, this function must handle
1160 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
1161 going to be the section symbol corresponding to the output
1162 section, which means that the addend must be adjusted
1165 Returns FALSE on error, TRUE on success, 2 if successful and
1166 relocations should be written for this section. */
1167 int (*elf_backend_relocate_section
)
1168 (bfd
*output_bfd
, struct bfd_link_info
*info
, bfd
*input_bfd
,
1169 asection
*input_section
, bfd_byte
*contents
, Elf_Internal_Rela
*relocs
,
1170 Elf_Internal_Sym
*local_syms
, asection
**local_sections
);
1172 /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend
1173 linker just before it writes a symbol out to the .dynsym section.
1174 The processor backend may make any required adjustment to the
1175 symbol. It may also take the opportunity to set contents of the
1176 dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on
1177 all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called
1178 on those symbols which are defined by a dynamic object. */
1179 bfd_boolean (*elf_backend_finish_dynamic_symbol
)
1180 (bfd
*output_bfd
, struct bfd_link_info
*info
,
1181 struct elf_link_hash_entry
*h
, Elf_Internal_Sym
*sym
);
1183 /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend
1184 linker just before it writes all the dynamic sections out to the
1185 output file. The FINISH_DYNAMIC_SYMBOL will have been called on
1186 all dynamic symbols. */
1187 bfd_boolean (*elf_backend_finish_dynamic_sections
)
1188 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1190 /* A function to do any beginning processing needed for the ELF file
1191 before building the ELF headers and computing file positions. */
1192 void (*elf_backend_begin_write_processing
)
1193 (bfd
*, struct bfd_link_info
*);
1195 /* A function to do any final processing needed for the ELF file
1196 before writing it out. */
1197 bfd_boolean (*elf_backend_final_write_processing
)
1200 /* This function is called by get_program_header_size. It should
1201 return the number of additional program segments which this BFD
1202 will need. It should return -1 on error. */
1203 int (*elf_backend_additional_program_headers
)
1204 (bfd
*, struct bfd_link_info
*);
1206 /* This function is called to modify an existing segment map in a
1207 backend specific fashion. */
1208 bfd_boolean (*elf_backend_modify_segment_map
)
1209 (bfd
*, struct bfd_link_info
*);
1211 /* This function is called to modify program headers just before
1212 they are written. */
1213 bfd_boolean (*elf_backend_modify_headers
)
1214 (bfd
*, struct bfd_link_info
*);
1216 /* This function is called to see if the PHDR header should be
1217 checked for validity. */
1218 bfd_boolean (*elf_backend_allow_non_load_phdr
)
1219 (bfd
*, const Elf_Internal_Phdr
*, unsigned);
1221 /* This function is called before section garbage collection to
1222 mark entry symbol sections. */
1224 (struct bfd_link_info
*);
1226 /* This function is called during section garbage collection to
1227 mark sections that define global symbols. */
1228 bfd_boolean (*gc_mark_dynamic_ref
)
1229 (struct elf_link_hash_entry
*, void *);
1231 /* This function is called during section gc to discover the section a
1232 particular relocation refers to. */
1233 elf_gc_mark_hook_fn gc_mark_hook
;
1235 /* This function, if defined, is called after the first gc marking pass
1236 to allow the backend to mark additional sections. */
1237 bfd_boolean (*gc_mark_extra_sections
)
1238 (struct bfd_link_info
*, elf_gc_mark_hook_fn
);
1240 /* This function is called to initialise ELF file header info.
1241 Customised versions can modify things like the OS and ABI version. */
1242 bfd_boolean (*elf_backend_init_file_header
)
1243 (bfd
*, struct bfd_link_info
*);
1245 /* This function, if defined, prints a symbol to file and returns the
1246 name of the symbol to be printed. It should return NULL to fall
1247 back to default symbol printing. */
1248 const char *(*elf_backend_print_symbol_all
)
1249 (bfd
*, void *, asymbol
*);
1251 /* This function, if defined, is called after all local symbols and
1252 global symbols converted to locals are emitted into the symtab
1253 section. It allows the backend to emit special local symbols
1254 not handled in the hash table. */
1255 bfd_boolean (*elf_backend_output_arch_local_syms
)
1256 (bfd
*, struct bfd_link_info
*, void *,
1257 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym
*, asection
*,
1258 struct elf_link_hash_entry
*));
1260 /* This function, if defined, is called after all symbols are emitted
1261 into the symtab section. It allows the backend to emit special
1262 global symbols not handled in the hash table. */
1263 bfd_boolean (*elf_backend_output_arch_syms
)
1264 (bfd
*, struct bfd_link_info
*, void *,
1265 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym
*, asection
*,
1266 struct elf_link_hash_entry
*));
1268 /* Filter what symbols of the output file to include in the import
1269 library if one is created. */
1270 unsigned int (*elf_backend_filter_implib_symbols
)
1271 (bfd
*, struct bfd_link_info
*, asymbol
**, long);
1273 /* Copy any information related to dynamic linking from a pre-existing
1274 symbol to a newly created symbol. Also called to copy flags and
1275 other back-end info to a weakdef, in which case the symbol is not
1276 newly created and plt/got refcounts and dynamic indices should not
1278 void (*elf_backend_copy_indirect_symbol
)
1279 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
1280 struct elf_link_hash_entry
*);
1282 /* Modify any information related to dynamic linking such that the
1283 symbol is not exported. */
1284 void (*elf_backend_hide_symbol
)
1285 (struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd_boolean
);
1287 /* A function to do additional symbol fixup, called by
1288 _bfd_elf_fix_symbol_flags. */
1289 bfd_boolean (*elf_backend_fixup_symbol
)
1290 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
1292 /* Merge the backend specific symbol attribute. */
1293 void (*elf_backend_merge_symbol_attribute
)
1294 (struct elf_link_hash_entry
*, const Elf_Internal_Sym
*, bfd_boolean
,
1297 /* This function, if defined, will return a string containing the
1298 name of a target-specific dynamic tag. */
1299 char *(*elf_backend_get_target_dtag
)
1302 /* Decide whether an undefined symbol is special and can be ignored.
1303 This is the case for OPTIONAL symbols on IRIX. */
1304 bfd_boolean (*elf_backend_ignore_undef_symbol
)
1305 (struct elf_link_hash_entry
*);
1307 /* Emit relocations. Overrides default routine for emitting relocs,
1308 except during a relocatable link, or if all relocs are being emitted. */
1309 bfd_boolean (*elf_backend_emit_relocs
)
1310 (bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*,
1311 struct elf_link_hash_entry
**);
1313 /* Update relocations. It is allowed to change the number and the order.
1314 In such a case hashes should be invalidated. */
1315 void (*elf_backend_update_relocs
)
1316 (asection
*, struct bfd_elf_section_reloc_data
*);
1318 /* Count relocations. Not called for relocatable links
1319 or if all relocs are being preserved in the output. */
1320 unsigned int (*elf_backend_count_relocs
)
1321 (struct bfd_link_info
*, asection
*);
1323 /* Count additionals relocations. Called for relocatable links if
1324 additional relocations needs to be created. */
1325 unsigned int (*elf_backend_count_additional_relocs
)
1328 /* Say whether to sort relocs output by ld -r and ld --emit-relocs,
1329 by r_offset. If NULL, default to true. */
1330 bfd_boolean (*sort_relocs_p
)
1333 /* This function, if defined, is called when an NT_PRSTATUS note is found
1335 bfd_boolean (*elf_backend_grok_prstatus
)
1336 (bfd
*, Elf_Internal_Note
*);
1338 /* This function, if defined, is called when an NT_PSINFO or NT_PRPSINFO
1339 note is found in a core file. */
1340 bfd_boolean (*elf_backend_grok_psinfo
)
1341 (bfd
*, Elf_Internal_Note
*);
1343 /* This function, if defined, is called when a "FreeBSD" NT_PRSTATUS
1344 note is found in a core file. */
1345 bfd_boolean (*elf_backend_grok_freebsd_prstatus
)
1346 (bfd
*, Elf_Internal_Note
*);
1348 /* This function, if defined, is called to write a note to a corefile. */
1349 char *(*elf_backend_write_core_note
)
1350 (bfd
*abfd
, char *buf
, int *bufsiz
, int note_type
, ...);
1352 /* This function, if defined, is called to convert target-specific
1353 section flag names into hex values. */
1354 flagword (*elf_backend_lookup_section_flags_hook
)
1357 /* This function returns class of a reloc type. */
1358 enum elf_reloc_type_class (*elf_backend_reloc_type_class
)
1359 (const struct bfd_link_info
*, const asection
*, const Elf_Internal_Rela
*);
1361 /* This function, if defined, removes information about discarded functions
1362 from other sections which mention them. */
1363 bfd_boolean (*elf_backend_discard_info
)
1364 (bfd
*, struct elf_reloc_cookie
*, struct bfd_link_info
*);
1366 /* This function, if defined, signals that the function above has removed
1367 the discarded relocations for this section. */
1368 bfd_boolean (*elf_backend_ignore_discarded_relocs
)
1371 /* What to do when ld finds relocations against symbols defined in
1372 discarded sections. */
1373 unsigned int (*action_discarded
)
1376 /* This function returns the width of FDE pointers in bytes, or 0 if
1377 that can't be determined for some reason. The default definition
1378 goes by the bfd's EI_CLASS. */
1379 unsigned int (*elf_backend_eh_frame_address_size
)
1380 (bfd
*, const asection
*);
1382 /* These functions tell elf-eh-frame whether to attempt to turn
1383 absolute or lsda encodings into pc-relative ones. The default
1384 definition enables these transformations. */
1385 bfd_boolean (*elf_backend_can_make_relative_eh_frame
)
1386 (bfd
*, struct bfd_link_info
*, asection
*);
1387 bfd_boolean (*elf_backend_can_make_lsda_relative_eh_frame
)
1388 (bfd
*, struct bfd_link_info
*, asection
*);
1390 /* This function returns an encoding after computing the encoded
1391 value (and storing it in ENCODED) for the given OFFSET into OSEC,
1392 to be stored in at LOC_OFFSET into the LOC_SEC input section.
1393 The default definition chooses a 32-bit PC-relative encoding. */
1394 bfd_byte (*elf_backend_encode_eh_address
)
1395 (bfd
*abfd
, struct bfd_link_info
*info
,
1396 asection
*osec
, bfd_vma offset
,
1397 asection
*loc_sec
, bfd_vma loc_offset
,
1400 /* This function, if defined, may write out the given section.
1401 Returns TRUE if it did so and FALSE if the caller should. */
1402 bfd_boolean (*elf_backend_write_section
)
1403 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
1405 /* The level of IRIX compatibility we're striving for.
1406 MIPS ELF specific function. */
1407 irix_compat_t (*elf_backend_mips_irix_compat
)
1410 reloc_howto_type
*(*elf_backend_mips_rtype_to_howto
)
1411 (bfd
*, unsigned int, bfd_boolean
);
1413 /* The swapping table to use when dealing with ECOFF information.
1414 Used for the MIPS ELF .mdebug section. */
1415 const struct ecoff_debug_swap
*elf_backend_ecoff_debug_swap
;
1417 /* This function implements `bfd_elf_bfd_from_remote_memory';
1418 see elf.c, elfcode.h. */
1419 bfd
*(*elf_backend_bfd_from_remote_memory
)
1420 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
1421 int (*target_read_memory
) (bfd_vma vma
, bfd_byte
*myaddr
,
1422 bfd_size_type len
));
1424 bfd_boolean (*elf_backend_core_find_build_id
) (bfd
*, bfd_vma
);
1426 /* This function is used by `_bfd_elf_get_synthetic_symtab';
1428 bfd_vma (*plt_sym_val
) (bfd_vma
, const asection
*, const arelent
*);
1430 /* Is symbol defined in common section? */
1431 bfd_boolean (*common_definition
) (Elf_Internal_Sym
*);
1433 /* Return a common section index for section. */
1434 unsigned int (*common_section_index
) (asection
*);
1436 /* Return a common section for section. */
1437 asection
*(*common_section
) (asection
*);
1439 /* Return TRUE if we can merge 2 definitions. */
1440 bfd_boolean (*merge_symbol
) (struct elf_link_hash_entry
*,
1441 const Elf_Internal_Sym
*, asection
**,
1442 bfd_boolean
, bfd_boolean
,
1443 bfd
*, const asection
*);
1445 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
1446 bfd_boolean (*elf_hash_symbol
) (struct elf_link_hash_entry
*);
1448 /* If non-NULL, called to register the location of XLAT_LOC within
1449 .MIPS.xhash at which real final dynindx for H will be written.
1450 If XLAT_LOC is zero, the symbol is not included in
1451 .MIPS.xhash and no dynindx will be written. */
1452 void (*record_xhash_symbol
)
1453 (struct elf_link_hash_entry
*h
, bfd_vma xlat_loc
);
1455 /* Return TRUE if type is a function symbol type. */
1456 bfd_boolean (*is_function_type
) (unsigned int type
);
1458 /* If the ELF symbol SYM might be a function in SEC, return the
1459 function size and set *CODE_OFF to the function's entry point,
1460 otherwise return zero. */
1461 bfd_size_type (*maybe_function_sym
) (const asymbol
*sym
, asection
*sec
,
1464 /* Given NAME, the name of a relocation section stripped of its
1465 .rel/.rela prefix, return the section in ABFD to which the
1466 relocations apply. */
1467 asection
*(*get_reloc_section
) (bfd
*abfd
, const char *name
);
1469 /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
1470 has a type >= SHT_LOOS. Returns TRUE if the fields were initialised,
1471 FALSE otherwise. Can be called multiple times for a given section,
1472 until it returns TRUE. Most of the times it is called ISECTION will be
1473 set to an input section that might be associated with the output section.
1474 The last time that it is called, ISECTION will be set to NULL. */
1475 bfd_boolean (*elf_backend_copy_special_section_fields
)
1476 (const bfd
*ibfd
, bfd
*obfd
, const Elf_Internal_Shdr
*isection
,
1477 Elf_Internal_Shdr
*osection
);
1479 /* Used to handle bad SHF_LINK_ORDER input. */
1480 void (*link_order_error_handler
) (const char *, ...);
1482 /* Name of the PLT relocation section. */
1483 const char *relplt_name
;
1485 /* Alternate EM_xxxx machine codes for this backend. */
1486 int elf_machine_alt1
;
1487 int elf_machine_alt2
;
1489 const struct elf_size_info
*s
;
1491 /* An array of target specific special sections. */
1492 const struct bfd_elf_special_section
*special_sections
;
1494 /* The size in bytes of the header for the GOT. This includes the
1495 so-called reserved entries on some systems. */
1496 bfd_vma got_header_size
;
1498 /* The size of the GOT entry for the symbol pointed to by H if non-NULL,
1499 otherwise by the local symbol with index SYMNDX in IBFD. */
1500 bfd_vma (*got_elt_size
) (bfd
*, struct bfd_link_info
*,
1501 struct elf_link_hash_entry
*h
,
1502 bfd
*ibfd
, unsigned long symndx
);
1504 /* The vendor name to use for a processor-standard attributes section. */
1505 const char *obj_attrs_vendor
;
1507 /* The section name to use for a processor-standard attributes section. */
1508 const char *obj_attrs_section
;
1510 /* Return 1, 2 or 3 to indicate what type of arguments a
1511 processor-specific tag takes. */
1512 int (*obj_attrs_arg_type
) (int);
1514 /* The section type to use for an attributes section. */
1515 unsigned int obj_attrs_section_type
;
1517 /* This function determines the order in which any attributes are
1518 written. It must be defined for input in the range
1519 LEAST_KNOWN_OBJ_ATTRIBUTE..NUM_KNOWN_OBJ_ATTRIBUTES-1 (this range
1520 is used in order to make unity easy). The returned value is the
1521 actual tag number to place in the input position. */
1522 int (*obj_attrs_order
) (int);
1524 /* Handle merging unknown attributes; either warn and return TRUE,
1525 or give an error and return FALSE. */
1526 bfd_boolean (*obj_attrs_handle_unknown
) (bfd
*, int);
1528 /* Parse GNU properties. Return the property kind. If the property
1529 is corrupt, issue an error message and return property_corrupt. */
1530 enum elf_property_kind (*parse_gnu_properties
) (bfd
*, unsigned int,
1534 /* Merge GNU properties. Return TRUE if property is updated. */
1535 bfd_boolean (*merge_gnu_properties
) (struct bfd_link_info
*, bfd
*, bfd
*,
1536 elf_property
*, elf_property
*);
1538 /* Set up GNU properties. */
1539 bfd
*(*setup_gnu_properties
) (struct bfd_link_info
*);
1541 /* Fix up GNU properties. */
1542 void (*fixup_gnu_properties
) (struct bfd_link_info
*,
1543 elf_property_list
**);
1545 /* Encoding used for compact EH tables. */
1546 int (*compact_eh_encoding
) (struct bfd_link_info
*);
1548 /* Opcode representing no unwind. */
1549 int (*cant_unwind_opcode
) (struct bfd_link_info
*);
1551 /* Called when emitting an ELF symbol whoes input version had an
1552 ST_SHNDX field set to a value in the range SHN_LOPROC..SHN_HIOS.
1553 Returns the value to be installed in the ST_SHNDX field of the
1554 emitted symbol. If not defined, the value is left unchanged. */
1555 unsigned int (*symbol_section_index
) (bfd
*, elf_symbol_type
*);
1557 /* Called when a section has extra reloc sections. */
1558 bfd_boolean (*init_secondary_reloc_section
) (bfd
*, Elf_Internal_Shdr
*,
1559 const char *, unsigned int);
1561 /* Called when after loading the normal relocs for a section. */
1562 bfd_boolean (*slurp_secondary_relocs
) (bfd
*, asection
*, asymbol
**);
1564 /* Called after writing the normal relocs for a section. */
1565 bfd_boolean (*write_secondary_relocs
) (bfd
*, asection
*);
1567 /* This is non-zero if static TLS segments require a special alignment. */
1568 unsigned static_tls_alignment
;
1570 /* Alignment for the PT_GNU_STACK segment. */
1571 unsigned stack_align
;
1573 /* Flag bits to assign to a section of type SHT_STRTAB. */
1574 unsigned long elf_strtab_flags
;
1576 /* This is TRUE if the linker should act like collect and gather
1577 global constructors and destructors by name. This is TRUE for
1578 MIPS ELF because the Irix 5 tools can not handle the .init
1580 unsigned collect
: 1;
1582 /* This is TRUE if the linker should ignore changes to the type of a
1583 symbol. This is TRUE for MIPS ELF because some Irix 5 objects
1584 record undefined functions as STT_OBJECT although the definitions
1586 unsigned type_change_ok
: 1;
1588 /* Whether the backend may use REL relocations. (Some backends use
1589 both REL and RELA relocations, and this flag is set for those
1591 unsigned may_use_rel_p
: 1;
1593 /* Whether the backend may use RELA relocations. (Some backends use
1594 both REL and RELA relocations, and this flag is set for those
1596 unsigned may_use_rela_p
: 1;
1598 /* Whether the default relocation type is RELA. If a backend with
1599 this flag set wants REL relocations for a particular section,
1600 it must note that explicitly. Similarly, if this flag is clear,
1601 and the backend wants RELA relocations for a particular
1603 unsigned default_use_rela_p
: 1;
1605 /* True if PLT and copy relocations should be RELA by default. */
1606 unsigned rela_plts_and_copies_p
: 1;
1608 /* Set if RELA relocations for a relocatable link can be handled by
1609 generic code. Backends that set this flag need do nothing in the
1610 backend relocate_section routine for relocatable linking. */
1611 unsigned rela_normal
: 1;
1613 /* Set if DT_REL/DT_RELA/DT_RELSZ/DT_RELASZ should not include PLT
1615 unsigned dtrel_excludes_plt
: 1;
1617 /* TRUE if addresses "naturally" sign extend. This is used when
1618 swapping in from Elf32 when BFD64. */
1619 unsigned sign_extend_vma
: 1;
1621 unsigned want_got_plt
: 1;
1622 unsigned plt_readonly
: 1;
1623 unsigned want_plt_sym
: 1;
1624 unsigned plt_not_loaded
: 1;
1625 unsigned plt_alignment
: 4;
1626 unsigned can_gc_sections
: 1;
1627 unsigned can_refcount
: 1;
1628 unsigned want_got_sym
: 1;
1629 unsigned want_dynbss
: 1;
1630 unsigned want_dynrelro
: 1;
1632 /* Targets which do not support physical addressing often require
1633 that the p_paddr field in the section header to be set to zero.
1634 This field indicates whether this behavior is required. */
1635 unsigned want_p_paddr_set_to_zero
: 1;
1637 /* Target has broken hardware and/or kernel that requires pages not
1638 to be mapped twice with different permissions. */
1639 unsigned no_page_alias
: 1;
1641 /* True if an object file lacking a .note.GNU-stack section
1642 should be assumed to be requesting exec stack. At least one
1643 other file in the link needs to have a .note.GNU-stack section
1644 for a PT_GNU_STACK segment to be created. */
1645 unsigned default_execstack
: 1;
1647 /* True if elf_section_data(sec)->this_hdr.contents is sec->rawsize
1648 in length rather than sec->size in length, if sec->rawsize is
1649 non-zero and smaller than sec->size. */
1650 unsigned caches_rawsize
: 1;
1652 /* Address of protected data defined in the shared library may be
1653 external, i.e., due to copy relocation. */
1654 unsigned extern_protected_data
: 1;
1656 /* True if `_bfd_elf_link_renumber_dynsyms' must be called even for
1658 unsigned always_renumber_dynsyms
: 1;
1660 /* True if the 32-bit Linux PRPSINFO structure's `pr_uid' and `pr_gid'
1661 members use a 16-bit data type. */
1662 unsigned linux_prpsinfo32_ugid16
: 1;
1664 /* True if the 64-bit Linux PRPSINFO structure's `pr_uid' and `pr_gid'
1665 members use a 16-bit data type. */
1666 unsigned linux_prpsinfo64_ugid16
: 1;
1669 /* Information about reloc sections associated with a bfd_elf_section_data
1671 struct bfd_elf_section_reloc_data
1673 /* The ELF header for the reloc section associated with this
1675 Elf_Internal_Shdr
*hdr
;
1676 /* The number of relocations currently assigned to HDR. */
1678 /* The ELF section number of the reloc section. Only used for an
1681 /* Used by the backend linker to store the symbol hash table entries
1682 associated with relocs against global symbols. */
1683 struct elf_link_hash_entry
**hashes
;
1686 /* Information stored for each BFD section in an ELF file. This
1687 structure is allocated by elf_new_section_hook. */
1689 struct bfd_elf_section_data
1691 /* The ELF header for this section. */
1692 Elf_Internal_Shdr this_hdr
;
1694 /* INPUT_SECTION_FLAGS if specified in the linker script. */
1695 struct flag_info
*section_flag_info
;
1697 /* Information about the REL and RELA reloc sections associated
1698 with this section, if any. */
1699 struct bfd_elf_section_reloc_data rel
, rela
;
1701 /* The ELF section number of this section. */
1704 /* Used by the backend linker when generating a shared library to
1705 record the dynamic symbol index for a section symbol
1706 corresponding to this section. A value of 0 means that there is
1707 no dynamic symbol for this section. */
1710 /* A pointer to the linked-to section for SHF_LINK_ORDER. */
1711 asection
*linked_to
;
1713 /* A pointer to the swapped relocs. If the section uses REL relocs,
1714 rather than RELA, all the r_addend fields will be zero. This
1715 pointer may be NULL. It is used by the backend linker. */
1716 Elf_Internal_Rela
*relocs
;
1718 /* A pointer to a linked list tracking dynamic relocs copied for
1722 /* A pointer to the bfd section used for dynamic relocs. */
1726 /* Group name, if this section is a member of a group. */
1729 /* Group signature sym, if this is the SHT_GROUP section. */
1730 struct bfd_symbol
*id
;
1733 /* For a member of a group, points to the SHT_GROUP section.
1734 NULL for the SHT_GROUP section itself and non-group sections. */
1735 asection
*sec_group
;
1737 /* A linked list of member sections in the group. Circular when used by
1738 the linker. For the SHT_GROUP section, points at first member. */
1739 asection
*next_in_group
;
1741 /* The FDEs associated with this section. The u.fde.next_in_section
1742 field acts as a chain pointer. */
1743 struct eh_cie_fde
*fde_list
;
1745 /* Link from a text section to its .eh_frame_entry section. */
1746 asection
*eh_frame_entry
;
1748 /* A pointer used for various section optimizations. */
1752 #define elf_section_data(sec) ((struct bfd_elf_section_data*)(sec)->used_by_bfd)
1753 #define elf_linked_to_section(sec) (elf_section_data(sec)->linked_to)
1754 #define elf_section_type(sec) (elf_section_data(sec)->this_hdr.sh_type)
1755 #define elf_section_flags(sec) (elf_section_data(sec)->this_hdr.sh_flags)
1756 #define elf_section_info(sec) (elf_section_data(sec)->this_hdr.sh_info)
1757 #define elf_group_name(sec) (elf_section_data(sec)->group.name)
1758 #define elf_group_id(sec) (elf_section_data(sec)->group.id)
1759 #define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group)
1760 #define elf_fde_list(sec) (elf_section_data(sec)->fde_list)
1761 #define elf_sec_group(sec) (elf_section_data(sec)->sec_group)
1762 #define elf_section_eh_frame_entry(sec) (elf_section_data(sec)->eh_frame_entry)
1764 #define xvec_get_elf_backend_data(xvec) \
1765 ((const struct elf_backend_data *) (xvec)->backend_data)
1767 #define get_elf_backend_data(abfd) \
1768 xvec_get_elf_backend_data ((abfd)->xvec)
1770 /* The least object attributes (within an attributes subsection) known
1771 for any target. Some code assumes that the value 0 is not used and
1772 the field for that attribute can instead be used as a marker to
1773 indicate that attributes have been initialized. */
1774 #define LEAST_KNOWN_OBJ_ATTRIBUTE 2
1776 /* The maximum number of known object attributes for any target. */
1777 #define NUM_KNOWN_OBJ_ATTRIBUTES 71
1779 /* The value of an object attribute. The type indicates whether the attribute
1780 holds and integer, a string, or both. It can also indicate that there can
1781 be no default (i.e. all values must be written to file, even zero), or
1782 that the value is in error and should not be written to file. */
1784 typedef struct obj_attribute
1786 #define ATTR_TYPE_FLAG_INT_VAL (1 << 0)
1787 #define ATTR_TYPE_FLAG_STR_VAL (1 << 1)
1788 #define ATTR_TYPE_FLAG_NO_DEFAULT (1 << 2)
1789 #define ATTR_TYPE_FLAG_ERROR (1 << 3)
1791 #define ATTR_TYPE_HAS_INT_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_INT_VAL)
1792 #define ATTR_TYPE_HAS_STR_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_STR_VAL)
1793 #define ATTR_TYPE_HAS_NO_DEFAULT(TYPE) ((TYPE) & ATTR_TYPE_FLAG_NO_DEFAULT)
1794 #define ATTR_TYPE_HAS_ERROR(TYPE) ((TYPE) & ATTR_TYPE_FLAG_ERROR)
1801 typedef struct obj_attribute_list
1803 struct obj_attribute_list
*next
;
1806 } obj_attribute_list
;
1808 /* Object attributes may either be defined by the processor ABI, index
1809 OBJ_ATTR_PROC in the *_obj_attributes arrays, or be GNU-specific
1810 (and possibly also processor-specific), index OBJ_ATTR_GNU. */
1811 #define OBJ_ATTR_PROC 0
1812 #define OBJ_ATTR_GNU 1
1813 #define OBJ_ATTR_FIRST OBJ_ATTR_PROC
1814 #define OBJ_ATTR_LAST OBJ_ATTR_GNU
1816 /* The following object attribute tags are taken as generic, for all
1817 targets and for "gnu" where there is no target standard. */
1824 Tag_compatibility
= 32
1827 /* The following struct stores information about every SystemTap section
1828 found in the object file. */
1831 struct sdt_note
*next
;
1836 /* tdata information grabbed from an elf core file. */
1837 struct core_elf_obj_tdata
1846 /* Extra tdata information held for output ELF BFDs. */
1847 struct output_elf_obj_tdata
1849 struct elf_segment_map
*seg_map
;
1850 struct elf_strtab_hash
*strtab_ptr
;
1852 /* STT_SECTION symbols for each section */
1853 asymbol
**section_syms
;
1855 /* Used to determine if PT_GNU_EH_FRAME segment header should be
1857 asection
*eh_frame_hdr
;
1859 /* NT_GNU_BUILD_ID note type info. */
1862 bfd_boolean (*after_write_object_contents
) (bfd
*);
1867 /* Records the result of `get_program_header_size'. */
1868 bfd_size_type program_header_size
;
1870 /* Used when laying out sections. */
1871 file_ptr next_file_pos
;
1873 int num_section_syms
;
1874 unsigned int shstrtab_section
, strtab_section
;
1876 /* Segment flags for the PT_GNU_STACK segment. */
1877 unsigned int stack_flags
;
1879 /* Used to determine if the e_flags field has been initialized */
1880 bfd_boolean flags_init
;
1883 /* Indicate if the bfd contains SHF_GNU_MBIND sections or symbols that
1884 have the STT_GNU_IFUNC symbol type or STB_GNU_UNIQUE binding. Used
1885 to set the osabi field in the ELF header structure. */
1888 elf_gnu_osabi_mbind
= 1 << 0,
1889 elf_gnu_osabi_ifunc
= 1 << 1,
1890 elf_gnu_osabi_unique
= 1 << 2,
1893 typedef struct elf_section_list
1895 Elf_Internal_Shdr hdr
;
1897 struct elf_section_list
* next
;
1900 enum dynamic_lib_link_class
{
1904 DYN_NO_ADD_NEEDED
= 4,
1908 /* Some private data is stashed away for future use using the tdata pointer
1909 in the bfd structure. */
1911 struct elf_obj_tdata
1913 Elf_Internal_Ehdr elf_header
[1]; /* Actual data, but ref like ptr */
1914 Elf_Internal_Shdr
**elf_sect_ptr
;
1915 Elf_Internal_Phdr
*phdr
;
1916 Elf_Internal_Shdr symtab_hdr
;
1917 Elf_Internal_Shdr shstrtab_hdr
;
1918 Elf_Internal_Shdr strtab_hdr
;
1919 Elf_Internal_Shdr dynsymtab_hdr
;
1920 Elf_Internal_Shdr dynstrtab_hdr
;
1921 Elf_Internal_Shdr dynversym_hdr
;
1922 Elf_Internal_Shdr dynverref_hdr
;
1923 Elf_Internal_Shdr dynverdef_hdr
;
1924 elf_section_list
* symtab_shndx_list
;
1925 bfd_vma gp
; /* The gp value */
1926 unsigned int gp_size
; /* The gp size */
1927 unsigned int num_elf_sections
; /* elf_sect_ptr size */
1929 /* A mapping from external symbols to entries in the linker hash
1930 table, used when linking. This is indexed by the symbol index
1931 minus the sh_info field of the symbol table header. */
1932 struct elf_link_hash_entry
**sym_hashes
;
1934 /* Track usage and final offsets of GOT entries for local symbols.
1935 This array is indexed by symbol index. Elements are used
1936 identically to "got" in struct elf_link_hash_entry. */
1939 bfd_signed_vma
*refcounts
;
1941 struct got_entry
**ents
;
1944 /* The linker ELF emulation code needs to let the backend ELF linker
1945 know what filename should be used for a dynamic object if the
1946 dynamic object is found using a search. The emulation code then
1947 sometimes needs to know what name was actually used. Until the
1948 file has been added to the linker symbol table, this field holds
1949 the name the linker wants. After it has been added, it holds the
1950 name actually used, which will be the DT_SONAME entry if there is
1952 const char *dt_name
;
1954 /* The linker emulation needs to know what audit libs
1955 are used by a dynamic object. */
1956 const char *dt_audit
;
1958 /* Used by find_nearest_line entry point. */
1961 /* A place to stash dwarf1 info for this bfd. */
1962 struct dwarf1_debug
*dwarf1_find_line_info
;
1964 /* A place to stash dwarf2 info for this bfd. */
1965 void *dwarf2_find_line_info
;
1967 /* Stash away info for yet another find line/function variant. */
1968 void *elf_find_function_cache
;
1970 /* Number of symbol version definitions we are about to emit. */
1971 unsigned int cverdefs
;
1973 /* Number of symbol version references we are about to emit. */
1974 unsigned int cverrefs
;
1976 /* Symbol version definitions in external objects. */
1977 Elf_Internal_Verdef
*verdef
;
1979 /* Symbol version references to external objects. */
1980 Elf_Internal_Verneed
*verref
;
1982 /* A pointer to the .eh_frame section. */
1983 asection
*eh_frame_section
;
1985 /* Symbol buffer. */
1988 /* List of GNU properties. Will be updated by setup_gnu_properties
1989 after all input GNU properties are merged for output. */
1990 elf_property_list
*properties
;
1992 obj_attribute known_obj_attributes
[2][NUM_KNOWN_OBJ_ATTRIBUTES
];
1993 obj_attribute_list
*other_obj_attributes
[2];
1995 /* Linked-list containing information about every Systemtap section
1996 found in the object file. Each section corresponds to one entry
1998 struct sdt_note
*sdt_note_head
;
2000 Elf_Internal_Shdr
**group_sect_ptr
;
2001 unsigned int num_group
;
2003 /* Index into group_sect_ptr, updated by setup_group when finding a
2004 section's group. Used to optimize subsequent group searches. */
2005 unsigned int group_search_offset
;
2007 unsigned int symtab_section
, dynsymtab_section
;
2008 unsigned int dynversym_section
, dynverdef_section
, dynverref_section
;
2010 /* An identifier used to distinguish different target
2011 specific extensions to this structure. */
2012 ENUM_BITFIELD (elf_target_id
) object_id
: 6;
2014 /* Whether a dyanmic object was specified normally on the linker
2015 command line, or was specified when --as-needed was in effect,
2016 or was found via a DT_NEEDED entry. */
2017 ENUM_BITFIELD (dynamic_lib_link_class
) dyn_lib_class
: 4;
2019 /* Whether the bfd uses OS specific bits that require ELFOSABI_GNU. */
2020 ENUM_BITFIELD (elf_gnu_osabi
) has_gnu_osabi
: 3;
2022 /* Whether if the bfd contains the GNU_PROPERTY_NO_COPY_ON_PROTECTED
2024 unsigned int has_no_copy_on_protected
: 1;
2026 /* Irix 5 often screws up the symbol table, sorting local symbols
2027 after global symbols. This flag is set if the symbol table in
2028 this BFD appears to be screwed up. If it is, we ignore the
2029 sh_info field in the symbol table header, and always read all the
2031 unsigned int bad_symtab
: 1;
2033 /* Information grabbed from an elf core file. */
2034 struct core_elf_obj_tdata
*core
;
2036 /* More information held for output ELF BFDs. */
2037 struct output_elf_obj_tdata
*o
;
2040 #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
2042 #define elf_object_id(bfd) (elf_tdata(bfd) -> object_id)
2043 #define elf_program_header_size(bfd) (elf_tdata(bfd) -> o->program_header_size)
2044 #define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header)
2045 #define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr)
2046 #define elf_numsections(bfd) (elf_tdata(bfd) -> num_elf_sections)
2047 #define elf_seg_map(bfd) (elf_tdata(bfd) -> o->seg_map)
2048 #define elf_next_file_pos(bfd) (elf_tdata(bfd) -> o->next_file_pos)
2049 #define elf_eh_frame_hdr(bfd) (elf_tdata(bfd) -> o->eh_frame_hdr)
2050 #define elf_stack_flags(bfd) (elf_tdata(bfd) -> o->stack_flags)
2051 #define elf_shstrtab(bfd) (elf_tdata(bfd) -> o->strtab_ptr)
2052 #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section)
2053 #define elf_symtab_shndx_list(bfd) (elf_tdata(bfd) -> symtab_shndx_list)
2054 #define elf_strtab_sec(bfd) (elf_tdata(bfd) -> o->strtab_section)
2055 #define elf_shstrtab_sec(bfd) (elf_tdata(bfd) -> o->shstrtab_section)
2056 #define elf_symtab_hdr(bfd) (elf_tdata(bfd) -> symtab_hdr)
2057 #define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section)
2058 #define elf_dynversym(bfd) (elf_tdata(bfd) -> dynversym_section)
2059 #define elf_dynverdef(bfd) (elf_tdata(bfd) -> dynverdef_section)
2060 #define elf_dynverref(bfd) (elf_tdata(bfd) -> dynverref_section)
2061 #define elf_eh_frame_section(bfd) \
2062 (elf_tdata(bfd) -> eh_frame_section)
2063 #define elf_section_syms(bfd) (elf_tdata(bfd) -> o->section_syms)
2064 #define elf_num_section_syms(bfd) (elf_tdata(bfd) -> o->num_section_syms)
2065 #define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
2066 #define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
2067 #define elf_gp(bfd) (elf_tdata(bfd) -> gp)
2068 #define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size)
2069 #define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes)
2070 #define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts)
2071 #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets)
2072 #define elf_local_got_ents(bfd) (elf_tdata(bfd) -> local_got.ents)
2073 #define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name)
2074 #define elf_dt_audit(bfd) (elf_tdata(bfd) -> dt_audit)
2075 #define elf_dyn_lib_class(bfd) (elf_tdata(bfd) -> dyn_lib_class)
2076 #define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab)
2077 #define elf_flags_init(bfd) (elf_tdata(bfd) -> o->flags_init)
2078 #define elf_known_obj_attributes(bfd) (elf_tdata (bfd) -> known_obj_attributes)
2079 #define elf_other_obj_attributes(bfd) (elf_tdata (bfd) -> other_obj_attributes)
2080 #define elf_known_obj_attributes_proc(bfd) \
2081 (elf_known_obj_attributes (bfd) [OBJ_ATTR_PROC])
2082 #define elf_other_obj_attributes_proc(bfd) \
2083 (elf_other_obj_attributes (bfd) [OBJ_ATTR_PROC])
2084 #define elf_properties(bfd) (elf_tdata (bfd) -> properties)
2085 #define elf_has_no_copy_on_protected(bfd) \
2086 (elf_tdata(bfd) -> has_no_copy_on_protected)
2088 extern void _bfd_elf_swap_verdef_in
2089 (bfd
*, const Elf_External_Verdef
*, Elf_Internal_Verdef
*);
2090 extern void _bfd_elf_swap_verdef_out
2091 (bfd
*, const Elf_Internal_Verdef
*, Elf_External_Verdef
*);
2092 extern void _bfd_elf_swap_verdaux_in
2093 (bfd
*, const Elf_External_Verdaux
*, Elf_Internal_Verdaux
*);
2094 extern void _bfd_elf_swap_verdaux_out
2095 (bfd
*, const Elf_Internal_Verdaux
*, Elf_External_Verdaux
*);
2096 extern void _bfd_elf_swap_verneed_in
2097 (bfd
*, const Elf_External_Verneed
*, Elf_Internal_Verneed
*);
2098 extern void _bfd_elf_swap_verneed_out
2099 (bfd
*, const Elf_Internal_Verneed
*, Elf_External_Verneed
*);
2100 extern void _bfd_elf_swap_vernaux_in
2101 (bfd
*, const Elf_External_Vernaux
*, Elf_Internal_Vernaux
*);
2102 extern void _bfd_elf_swap_vernaux_out
2103 (bfd
*, const Elf_Internal_Vernaux
*, Elf_External_Vernaux
*);
2104 extern void _bfd_elf_swap_versym_in
2105 (bfd
*, const Elf_External_Versym
*, Elf_Internal_Versym
*);
2106 extern void _bfd_elf_swap_versym_out
2107 (bfd
*, const Elf_Internal_Versym
*, Elf_External_Versym
*);
2109 extern unsigned int _bfd_elf_section_from_bfd_section
2110 (bfd
*, asection
*);
2111 extern char *bfd_elf_string_from_elf_section
2112 (bfd
*, unsigned, unsigned);
2113 extern Elf_Internal_Sym
*bfd_elf_get_elf_syms
2114 (bfd
*, Elf_Internal_Shdr
*, size_t, size_t, Elf_Internal_Sym
*, void *,
2115 Elf_External_Sym_Shndx
*);
2116 extern char * bfd_elf_get_str_section (bfd
*, unsigned int);
2117 extern const char *bfd_elf_sym_name
2118 (bfd
*, Elf_Internal_Shdr
*, Elf_Internal_Sym
*, asection
*);
2120 extern bfd_boolean _bfd_elf_copy_private_bfd_data
2122 extern bfd_boolean _bfd_elf_print_private_bfd_data
2124 const char * _bfd_elf_get_symbol_version_string
2125 (bfd
*, asymbol
*, bfd_boolean
, bfd_boolean
*);
2126 extern void bfd_elf_print_symbol
2127 (bfd
*, void *, asymbol
*, bfd_print_symbol_type
);
2129 extern unsigned int _bfd_elf_eh_frame_address_size
2130 (bfd
*, const asection
*);
2131 extern bfd_byte _bfd_elf_encode_eh_address
2132 (bfd
*abfd
, struct bfd_link_info
*info
, asection
*osec
, bfd_vma offset
,
2133 asection
*loc_sec
, bfd_vma loc_offset
, bfd_vma
*encoded
);
2134 extern bfd_boolean _bfd_elf_can_make_relative
2135 (bfd
*input_bfd
, struct bfd_link_info
*info
, asection
*eh_frame_section
);
2137 extern enum elf_reloc_type_class _bfd_elf_reloc_type_class
2138 (const struct bfd_link_info
*, const asection
*,
2139 const Elf_Internal_Rela
*);
2140 extern bfd_vma _bfd_elf_rela_local_sym
2141 (bfd
*, Elf_Internal_Sym
*, asection
**, Elf_Internal_Rela
*);
2142 extern bfd_vma _bfd_elf_rel_local_sym
2143 (bfd
*, Elf_Internal_Sym
*, asection
**, bfd_vma
);
2144 extern bfd_vma _bfd_elf_section_offset
2145 (bfd
*, struct bfd_link_info
*, asection
*, bfd_vma
);
2147 extern unsigned long bfd_elf_hash
2149 extern unsigned long bfd_elf_gnu_hash
2152 extern bfd_reloc_status_type bfd_elf_generic_reloc
2153 (bfd
*, arelent
*, asymbol
*, void *, asection
*, bfd
*, char **);
2154 extern bfd_boolean bfd_elf_allocate_object
2155 (bfd
*, size_t, enum elf_target_id
);
2156 extern bfd_boolean bfd_elf_make_object
2158 extern bfd_boolean bfd_elf_mkcorefile
2160 extern bfd_boolean _bfd_elf_make_section_from_shdr
2161 (bfd
*, Elf_Internal_Shdr
*, const char *, int);
2162 extern bfd_boolean _bfd_elf_make_section_from_phdr
2163 (bfd
*, Elf_Internal_Phdr
*, int, const char *);
2164 extern struct bfd_hash_entry
*_bfd_elf_link_hash_newfunc
2165 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *);
2166 extern struct bfd_link_hash_table
*_bfd_elf_link_hash_table_create
2168 extern void _bfd_elf_link_hash_table_free
2170 extern void _bfd_elf_link_hash_copy_indirect
2171 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
2172 struct elf_link_hash_entry
*);
2173 extern void _bfd_elf_link_hash_hide_symbol
2174 (struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd_boolean
);
2175 extern void _bfd_elf_link_hide_symbol
2176 (bfd
*, struct bfd_link_info
*, struct bfd_link_hash_entry
*);
2177 extern bfd_boolean _bfd_elf_link_hash_fixup_symbol
2178 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
2179 extern bfd_boolean _bfd_elf_link_hash_table_init
2180 (struct elf_link_hash_table
*, bfd
*,
2181 struct bfd_hash_entry
*(*)
2182 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *),
2183 unsigned int, enum elf_target_id
);
2184 extern bfd_boolean _bfd_elf_slurp_version_tables
2185 (bfd
*, bfd_boolean
);
2186 extern bfd_boolean _bfd_elf_merge_sections
2187 (bfd
*, struct bfd_link_info
*);
2188 extern bfd_boolean _bfd_elf_match_sections_by_type
2189 (bfd
*, const asection
*, bfd
*, const asection
*);
2190 extern bfd_boolean bfd_elf_is_group_section
2191 (bfd
*, const struct bfd_section
*);
2192 extern const char *bfd_elf_group_name
2193 (bfd
*, const struct bfd_section
*);
2194 extern bfd_boolean _bfd_elf_section_already_linked
2195 (bfd
*, asection
*, struct bfd_link_info
*);
2196 extern void bfd_elf_set_group_contents
2197 (bfd
*, asection
*, void *);
2198 extern unsigned int _bfd_elf_filter_global_symbols
2199 (bfd
*, struct bfd_link_info
*, asymbol
**, long);
2200 extern asection
*_bfd_elf_check_kept_section
2201 (asection
*, struct bfd_link_info
*);
2202 #define _bfd_elf_link_just_syms _bfd_generic_link_just_syms
2203 extern void _bfd_elf_copy_link_hash_symbol_type
2204 (bfd
*, struct bfd_link_hash_entry
*, struct bfd_link_hash_entry
*);
2205 extern bfd_boolean _bfd_elf_size_group_sections
2206 (struct bfd_link_info
*);
2207 extern bfd_boolean _bfd_elf_fixup_group_sections
2208 (bfd
*, asection
*);
2209 extern bfd_boolean _bfd_elf_copy_private_header_data
2211 extern bfd_boolean _bfd_elf_copy_private_symbol_data
2212 (bfd
*, asymbol
*, bfd
*, asymbol
*);
2213 #define _bfd_generic_init_private_section_data \
2214 _bfd_elf_init_private_section_data
2215 extern bfd_boolean _bfd_elf_init_private_section_data
2216 (bfd
*, asection
*, bfd
*, asection
*, struct bfd_link_info
*);
2217 extern bfd_boolean _bfd_elf_copy_private_section_data
2218 (bfd
*, asection
*, bfd
*, asection
*);
2219 extern bfd_boolean _bfd_elf_write_object_contents
2221 extern bfd_boolean _bfd_elf_write_corefile_contents
2223 extern bfd_boolean _bfd_elf_set_section_contents
2224 (bfd
*, sec_ptr
, const void *, file_ptr
, bfd_size_type
);
2225 extern long _bfd_elf_get_symtab_upper_bound
2227 extern long _bfd_elf_canonicalize_symtab
2228 (bfd
*, asymbol
**);
2229 extern long _bfd_elf_get_dynamic_symtab_upper_bound
2231 extern long _bfd_elf_canonicalize_dynamic_symtab
2232 (bfd
*, asymbol
**);
2233 extern long _bfd_elf_get_synthetic_symtab
2234 (bfd
*, long, asymbol
**, long, asymbol
**, asymbol
**);
2235 extern long _bfd_elf_get_reloc_upper_bound
2237 extern long _bfd_elf_canonicalize_reloc
2238 (bfd
*, sec_ptr
, arelent
**, asymbol
**);
2239 extern asection
* _bfd_elf_get_dynamic_reloc_section
2240 (bfd
*, asection
*, bfd_boolean
);
2241 extern asection
* _bfd_elf_make_dynamic_reloc_section
2242 (asection
*, bfd
*, unsigned int, bfd
*, bfd_boolean
);
2243 extern long _bfd_elf_get_dynamic_reloc_upper_bound
2245 extern long _bfd_elf_canonicalize_dynamic_reloc
2246 (bfd
*, arelent
**, asymbol
**);
2247 extern asymbol
*_bfd_elf_make_empty_symbol
2249 extern void _bfd_elf_get_symbol_info
2250 (bfd
*, asymbol
*, symbol_info
*);
2251 extern bfd_boolean _bfd_elf_is_local_label_name
2252 (bfd
*, const char *);
2253 extern alent
*_bfd_elf_get_lineno
2255 extern bfd_boolean _bfd_elf_set_arch_mach
2256 (bfd
*, enum bfd_architecture
, unsigned long);
2257 extern bfd_boolean _bfd_elf_find_nearest_line
2258 (bfd
*, asymbol
**, asection
*, bfd_vma
,
2259 const char **, const char **, unsigned int *, unsigned int *);
2260 extern bfd_boolean _bfd_elf_find_line
2261 (bfd
*, asymbol
**, asymbol
*, const char **, unsigned int *);
2262 extern bfd_boolean _bfd_elf_find_inliner_info
2263 (bfd
*, const char **, const char **, unsigned int *);
2264 extern asymbol
*_bfd_elf_find_function
2265 (bfd
*, asymbol
**, asection
*, bfd_vma
, const char **, const char **);
2266 #define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols
2267 #define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
2268 extern int _bfd_elf_sizeof_headers
2269 (bfd
*, struct bfd_link_info
*);
2270 extern bfd_boolean _bfd_elf_new_section_hook
2271 (bfd
*, asection
*);
2272 extern const struct bfd_elf_special_section
*_bfd_elf_get_special_section
2273 (const char *, const struct bfd_elf_special_section
*, unsigned int);
2274 extern const struct bfd_elf_special_section
*_bfd_elf_get_sec_type_attr
2275 (bfd
*, asection
*);
2277 extern bfd_boolean _bfd_elf_link_hide_sym_by_version
2278 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
2280 /* If the target doesn't have reloc handling written yet: */
2281 extern bfd_boolean _bfd_elf_no_info_to_howto
2282 (bfd
*, arelent
*, Elf_Internal_Rela
*);
2284 extern bfd_boolean bfd_section_from_shdr
2285 (bfd
*, unsigned int shindex
);
2286 extern bfd_boolean bfd_section_from_phdr
2287 (bfd
*, Elf_Internal_Phdr
*, int);
2289 extern int _bfd_elf_symbol_from_bfd_symbol
2290 (bfd
*, asymbol
**);
2292 extern Elf_Internal_Sym
*bfd_sym_from_r_symndx
2293 (struct sym_cache
*, bfd
*, unsigned long);
2294 extern asection
*bfd_section_from_elf_index
2295 (bfd
*, unsigned int);
2297 extern struct elf_strtab_hash
* _bfd_elf_strtab_init
2299 extern void _bfd_elf_strtab_free
2300 (struct elf_strtab_hash
*);
2301 extern size_t _bfd_elf_strtab_add
2302 (struct elf_strtab_hash
*, const char *, bfd_boolean
);
2303 extern void _bfd_elf_strtab_addref
2304 (struct elf_strtab_hash
*, size_t);
2305 extern void _bfd_elf_strtab_delref
2306 (struct elf_strtab_hash
*, size_t);
2307 extern unsigned int _bfd_elf_strtab_refcount
2308 (struct elf_strtab_hash
*, size_t);
2309 extern void _bfd_elf_strtab_clear_all_refs
2310 (struct elf_strtab_hash
*);
2311 extern void *_bfd_elf_strtab_save
2312 (struct elf_strtab_hash
*);
2313 extern void _bfd_elf_strtab_restore
2314 (struct elf_strtab_hash
*, void *);
2315 extern bfd_size_type _bfd_elf_strtab_size
2316 (struct elf_strtab_hash
*);
2317 extern bfd_size_type _bfd_elf_strtab_len
2318 (struct elf_strtab_hash
*);
2319 extern bfd_size_type _bfd_elf_strtab_offset
2320 (struct elf_strtab_hash
*, size_t);
2321 extern const char * _bfd_elf_strtab_str
2322 (struct elf_strtab_hash
*, size_t idx
, bfd_size_type
*offset
);
2323 extern bfd_boolean _bfd_elf_strtab_emit
2324 (bfd
*, struct elf_strtab_hash
*);
2325 extern void _bfd_elf_strtab_finalize
2326 (struct elf_strtab_hash
*);
2328 extern bfd_boolean bfd_elf_parse_eh_frame_entries
2329 (bfd
*, struct bfd_link_info
*);
2330 extern bfd_boolean _bfd_elf_parse_eh_frame_entry
2331 (struct bfd_link_info
*, asection
*, struct elf_reloc_cookie
*);
2332 extern void _bfd_elf_parse_eh_frame
2333 (bfd
*, struct bfd_link_info
*, asection
*, struct elf_reloc_cookie
*);
2334 extern bfd_boolean _bfd_elf_end_eh_frame_parsing
2335 (struct bfd_link_info
*info
);
2337 extern bfd_boolean _bfd_elf_discard_section_eh_frame
2338 (bfd
*, struct bfd_link_info
*, asection
*,
2339 bfd_boolean (*) (bfd_vma
, void *), struct elf_reloc_cookie
*);
2340 extern bfd_boolean _bfd_elf_adjust_eh_frame_global_symbol
2341 (struct elf_link_hash_entry
*, void *);
2342 extern bfd_boolean _bfd_elf_discard_section_eh_frame_hdr
2343 (bfd
*, struct bfd_link_info
*);
2344 extern bfd_vma _bfd_elf_eh_frame_section_offset
2345 (bfd
*, struct bfd_link_info
*, asection
*, bfd_vma
);
2346 extern bfd_boolean _bfd_elf_write_section_eh_frame
2347 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
2348 bfd_boolean _bfd_elf_write_section_eh_frame_entry
2349 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
2350 extern bfd_boolean
_bfd_elf_fixup_eh_frame_hdr (struct bfd_link_info
*);
2351 extern bfd_boolean _bfd_elf_write_section_eh_frame_hdr
2352 (bfd
*, struct bfd_link_info
*);
2353 extern bfd_boolean _bfd_elf_eh_frame_present
2354 (struct bfd_link_info
*);
2355 extern bfd_boolean _bfd_elf_eh_frame_entry_present
2356 (struct bfd_link_info
*);
2357 extern bfd_boolean _bfd_elf_maybe_strip_eh_frame_hdr
2358 (struct bfd_link_info
*);
2360 extern bfd_boolean
_bfd_elf_hash_symbol (struct elf_link_hash_entry
*);
2362 extern long _bfd_elf_link_lookup_local_dynindx
2363 (struct bfd_link_info
*, bfd
*, long);
2364 extern bfd_boolean _bfd_elf_compute_section_file_positions
2365 (bfd
*, struct bfd_link_info
*);
2366 extern file_ptr _bfd_elf_assign_file_position_for_section
2367 (Elf_Internal_Shdr
*, file_ptr
, bfd_boolean
);
2368 extern bfd_boolean _bfd_elf_modify_headers
2369 (bfd
*, struct bfd_link_info
*);
2371 extern bfd_boolean _bfd_elf_validate_reloc
2374 extern bfd_boolean bfd_elf_record_link_assignment
2375 (bfd
*, struct bfd_link_info
*, const char *, bfd_boolean
,
2377 extern bfd_boolean
bfd_elf_stack_segment_size (bfd
*, struct bfd_link_info
*,
2378 const char *, bfd_vma
);
2379 extern bfd_boolean bfd_elf_size_dynamic_sections
2380 (bfd
*, const char *, const char *, const char *, const char *, const char *,
2381 const char * const *, struct bfd_link_info
*, struct bfd_section
**);
2382 extern bfd_boolean bfd_elf_size_dynsym_hash_dynstr
2383 (bfd
*, struct bfd_link_info
*);
2384 extern bfd_boolean bfd_elf_get_bfd_needed_list
2385 (bfd
*, struct bfd_link_needed_list
**);
2386 extern struct bfd_link_needed_list
*bfd_elf_get_needed_list
2387 (bfd
*, struct bfd_link_info
*);
2388 extern void bfd_elf_set_dt_needed_name
2389 (bfd
*, const char *);
2390 extern const char *bfd_elf_get_dt_soname
2392 extern void bfd_elf_set_dyn_lib_class
2393 (bfd
*, enum dynamic_lib_link_class
);
2394 extern int bfd_elf_get_dyn_lib_class
2396 extern struct bfd_link_needed_list
*bfd_elf_get_runpath_list
2397 (bfd
*, struct bfd_link_info
*);
2398 extern int bfd_elf_discard_info
2399 (bfd
*, struct bfd_link_info
*);
2400 extern unsigned int _bfd_elf_default_action_discarded
2401 (struct bfd_section
*);
2402 extern struct bfd_section
*_bfd_elf_tls_setup
2403 (bfd
*, struct bfd_link_info
*);
2405 extern bfd_boolean _bfd_elf_link_create_dynamic_sections
2406 (bfd
*, struct bfd_link_info
*);
2407 extern bfd_boolean _bfd_elf_omit_section_dynsym_default
2408 (bfd
*, struct bfd_link_info
*, asection
*);
2409 extern bfd_boolean _bfd_elf_omit_section_dynsym_all
2410 (bfd
*, struct bfd_link_info
*, asection
*);
2411 extern bfd_boolean _bfd_elf_create_dynamic_sections
2412 (bfd
*, struct bfd_link_info
*);
2413 extern bfd_boolean _bfd_elf_create_got_section
2414 (bfd
*, struct bfd_link_info
*);
2415 extern asection
*_bfd_elf_section_for_symbol
2416 (struct elf_reloc_cookie
*, unsigned long, bfd_boolean
);
2417 extern struct elf_link_hash_entry
*_bfd_elf_define_linkage_sym
2418 (bfd
*, struct bfd_link_info
*, asection
*, const char *);
2419 extern void _bfd_elf_init_1_index_section
2420 (bfd
*, struct bfd_link_info
*);
2421 extern void _bfd_elf_init_2_index_sections
2422 (bfd
*, struct bfd_link_info
*);
2424 extern bfd_boolean _bfd_elfcore_make_pseudosection
2425 (bfd
*, char *, size_t, ufile_ptr
);
2426 extern char *_bfd_elfcore_strndup
2427 (bfd
*, char *, size_t);
2429 extern Elf_Internal_Rela
*_bfd_elf_link_read_relocs
2430 (bfd
*, asection
*, void *, Elf_Internal_Rela
*, bfd_boolean
);
2432 extern bfd_boolean _bfd_elf_link_output_relocs
2433 (bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*,
2434 struct elf_link_hash_entry
**);
2436 extern bfd_boolean _bfd_elf_adjust_dynamic_copy
2437 (struct bfd_link_info
*, struct elf_link_hash_entry
*, asection
*);
2439 extern bfd_boolean _bfd_elf_dynamic_symbol_p
2440 (struct elf_link_hash_entry
*, struct bfd_link_info
*, bfd_boolean
);
2442 extern bfd_boolean _bfd_elf_symbol_refs_local_p
2443 (struct elf_link_hash_entry
*, struct bfd_link_info
*, bfd_boolean
);
2445 extern bfd_reloc_status_type bfd_elf_perform_complex_relocation
2446 (bfd
*, asection
*, bfd_byte
*, Elf_Internal_Rela
*, bfd_vma
);
2448 extern bfd_boolean _bfd_elf_setup_sections
2451 extern struct bfd_link_hash_entry
*bfd_elf_define_start_stop
2452 (struct bfd_link_info
*, const char *, asection
*);
2454 extern bfd_boolean
_bfd_elf_init_file_header (bfd
*, struct bfd_link_info
*);
2456 extern bfd_boolean
_bfd_elf_final_write_processing (bfd
*);
2458 extern bfd_cleanup bfd_elf32_object_p
2460 extern bfd_cleanup bfd_elf32_core_file_p
2462 extern char *bfd_elf32_core_file_failing_command
2464 extern int bfd_elf32_core_file_failing_signal
2466 extern bfd_boolean bfd_elf32_core_file_matches_executable_p
2468 extern int bfd_elf32_core_file_pid
2470 extern bfd_boolean _bfd_elf32_core_find_build_id
2473 extern bfd_boolean bfd_elf32_swap_symbol_in
2474 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
2475 extern void bfd_elf32_swap_symbol_out
2476 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
2477 extern void bfd_elf32_swap_reloc_in
2478 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2479 extern void bfd_elf32_swap_reloc_out
2480 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2481 extern void bfd_elf32_swap_reloca_in
2482 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2483 extern void bfd_elf32_swap_reloca_out
2484 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2485 extern void bfd_elf32_swap_phdr_in
2486 (bfd
*, const Elf32_External_Phdr
*, Elf_Internal_Phdr
*);
2487 extern void bfd_elf32_swap_phdr_out
2488 (bfd
*, const Elf_Internal_Phdr
*, Elf32_External_Phdr
*);
2489 extern void bfd_elf32_swap_dyn_in
2490 (bfd
*, const void *, Elf_Internal_Dyn
*);
2491 extern void bfd_elf32_swap_dyn_out
2492 (bfd
*, const Elf_Internal_Dyn
*, void *);
2493 extern long bfd_elf32_slurp_symbol_table
2494 (bfd
*, asymbol
**, bfd_boolean
);
2495 extern bfd_boolean bfd_elf32_write_shdrs_and_ehdr
2497 extern int bfd_elf32_write_out_phdrs
2498 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
2499 extern bfd_boolean bfd_elf32_checksum_contents
2500 (bfd
* , void (*) (const void *, size_t, void *), void *);
2501 extern void bfd_elf32_write_relocs
2502 (bfd
*, asection
*, void *);
2503 extern bfd_boolean bfd_elf32_slurp_reloc_table
2504 (bfd
*, asection
*, asymbol
**, bfd_boolean
);
2506 extern bfd_cleanup bfd_elf64_object_p
2508 extern bfd_cleanup bfd_elf64_core_file_p
2510 extern char *bfd_elf64_core_file_failing_command
2512 extern int bfd_elf64_core_file_failing_signal
2514 extern bfd_boolean bfd_elf64_core_file_matches_executable_p
2516 extern int bfd_elf64_core_file_pid
2518 extern bfd_boolean _bfd_elf64_core_find_build_id
2521 extern bfd_boolean bfd_elf64_swap_symbol_in
2522 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
2523 extern void bfd_elf64_swap_symbol_out
2524 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
2525 extern void bfd_elf64_swap_reloc_in
2526 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2527 extern void bfd_elf64_swap_reloc_out
2528 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2529 extern void bfd_elf64_swap_reloca_in
2530 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2531 extern void bfd_elf64_swap_reloca_out
2532 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2533 extern void bfd_elf64_swap_phdr_in
2534 (bfd
*, const Elf64_External_Phdr
*, Elf_Internal_Phdr
*);
2535 extern void bfd_elf64_swap_phdr_out
2536 (bfd
*, const Elf_Internal_Phdr
*, Elf64_External_Phdr
*);
2537 extern void bfd_elf64_swap_dyn_in
2538 (bfd
*, const void *, Elf_Internal_Dyn
*);
2539 extern void bfd_elf64_swap_dyn_out
2540 (bfd
*, const Elf_Internal_Dyn
*, void *);
2541 extern long bfd_elf64_slurp_symbol_table
2542 (bfd
*, asymbol
**, bfd_boolean
);
2543 extern bfd_boolean bfd_elf64_write_shdrs_and_ehdr
2545 extern int bfd_elf64_write_out_phdrs
2546 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
2547 extern bfd_boolean bfd_elf64_checksum_contents
2548 (bfd
* , void (*) (const void *, size_t, void *), void *);
2549 extern void bfd_elf64_write_relocs
2550 (bfd
*, asection
*, void *);
2551 extern bfd_boolean bfd_elf64_slurp_reloc_table
2552 (bfd
*, asection
*, asymbol
**, bfd_boolean
);
2554 extern bfd_boolean _bfd_elf_default_relocs_compatible
2555 (const bfd_target
*, const bfd_target
*);
2557 extern bfd_boolean _bfd_elf_relocs_compatible
2558 (const bfd_target
*, const bfd_target
*);
2559 extern bfd_boolean _bfd_elf_notice_as_needed
2560 (bfd
*, struct bfd_link_info
*, enum notice_asneeded_action
);
2562 extern struct elf_link_hash_entry
*_bfd_elf_archive_symbol_lookup
2563 (bfd
*, struct bfd_link_info
*, const char *);
2564 extern bfd_boolean bfd_elf_link_add_symbols
2565 (bfd
*, struct bfd_link_info
*);
2566 extern bfd_boolean _bfd_elf_add_dynamic_entry
2567 (struct bfd_link_info
*, bfd_vma
, bfd_vma
);
2568 extern bfd_boolean _bfd_elf_strip_zero_sized_dynamic_sections
2569 (struct bfd_link_info
*);
2570 extern int bfd_elf_add_dt_needed_tag
2571 (bfd
*, struct bfd_link_info
*);
2572 extern bfd_boolean _bfd_elf_link_check_relocs
2573 (bfd
*, struct bfd_link_info
*);
2575 extern bfd_boolean bfd_elf_link_record_dynamic_symbol
2576 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
2578 extern int bfd_elf_link_record_local_dynamic_symbol
2579 (struct bfd_link_info
*, bfd
*, long);
2581 extern bfd_boolean _bfd_elf_close_and_cleanup
2584 extern bfd_boolean _bfd_elf_common_definition
2585 (Elf_Internal_Sym
*);
2587 extern unsigned int _bfd_elf_common_section_index
2590 extern asection
*_bfd_elf_common_section
2593 extern bfd_vma _bfd_elf_default_got_elt_size
2594 (bfd
*, struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd
*,
2597 extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn
2598 (bfd
*, arelent
*, struct bfd_symbol
*, void *,
2599 asection
*, bfd
*, char **);
2601 extern bfd_boolean bfd_elf_final_link
2602 (bfd
*, struct bfd_link_info
*);
2604 extern void _bfd_elf_gc_keep
2605 (struct bfd_link_info
*info
);
2607 extern bfd_boolean bfd_elf_gc_mark_dynamic_ref_symbol
2608 (struct elf_link_hash_entry
*h
, void *inf
);
2610 extern bfd_boolean bfd_elf_gc_sections
2611 (bfd
*, struct bfd_link_info
*);
2613 extern bfd_boolean bfd_elf_gc_record_vtinherit
2614 (bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
);
2616 extern bfd_boolean bfd_elf_gc_record_vtentry
2617 (bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
);
2619 extern asection
*_bfd_elf_gc_mark_hook
2620 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
2621 struct elf_link_hash_entry
*, Elf_Internal_Sym
*);
2623 extern asection
*_bfd_elf_gc_mark_rsec
2624 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
,
2625 struct elf_reloc_cookie
*, bfd_boolean
*);
2627 extern bfd_boolean _bfd_elf_gc_mark_reloc
2628 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
,
2629 struct elf_reloc_cookie
*);
2631 extern bfd_boolean _bfd_elf_gc_mark_fdes
2632 (struct bfd_link_info
*, asection
*, asection
*, elf_gc_mark_hook_fn
,
2633 struct elf_reloc_cookie
*);
2635 extern bfd_boolean _bfd_elf_gc_mark
2636 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
);
2638 extern bfd_boolean _bfd_elf_gc_mark_extra_sections
2639 (struct bfd_link_info
*, elf_gc_mark_hook_fn
);
2641 extern bfd_boolean bfd_elf_gc_common_finalize_got_offsets
2642 (bfd
*, struct bfd_link_info
*);
2644 extern bfd_boolean bfd_elf_gc_common_final_link
2645 (bfd
*, struct bfd_link_info
*);
2647 extern bfd_boolean bfd_elf_reloc_symbol_deleted_p
2650 extern struct elf_segment_map
* _bfd_elf_make_dynamic_segment
2651 (bfd
*, asection
*);
2653 extern bfd_boolean _bfd_elf_map_sections_to_segments
2654 (bfd
*, struct bfd_link_info
*);
2656 extern bfd_boolean
_bfd_elf_is_function_type (unsigned int);
2658 extern bfd_size_type
_bfd_elf_maybe_function_sym (const asymbol
*, asection
*,
2661 extern asection
*_bfd_elf_plt_get_reloc_section (bfd
*, const char *);
2663 extern int bfd_elf_get_default_section_type (flagword
);
2665 extern bfd_boolean bfd_elf_lookup_section_flags
2666 (struct bfd_link_info
*, struct flag_info
*, asection
*);
2668 extern Elf_Internal_Phdr
* _bfd_elf_find_segment_containing_section
2669 (bfd
* abfd
, asection
* section
);
2671 /* PowerPC @tls opcode transform/validate. */
2672 extern unsigned int _bfd_elf_ppc_at_tls_transform
2673 (unsigned int, unsigned int);
2674 /* PowerPC @tprel opcode transform/validate. */
2675 extern unsigned int _bfd_elf_ppc_at_tprel_transform
2676 (unsigned int, unsigned int);
2677 /* PowerPC elf_object_p tweak. */
2678 extern bfd_boolean
_bfd_elf_ppc_set_arch (bfd
*);
2679 /* PowerPC .gnu.attributes handling common to both 32-bit and 64-bit. */
2680 extern bfd_boolean _bfd_elf_ppc_merge_fp_attributes
2681 (bfd
*, struct bfd_link_info
*);
2683 /* Return an upper bound on the number of bytes required to store a
2684 copy of ABFD's program header table entries. Return -1 if an error
2685 occurs; bfd_get_error will return an appropriate code. */
2686 extern long bfd_get_elf_phdr_upper_bound
2689 /* Copy ABFD's program header table entries to *PHDRS. The entries
2690 will be stored as an array of Elf_Internal_Phdr structures, as
2691 defined in include/elf/internal.h. To find out how large the
2692 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
2694 Return the number of program header table entries read, or -1 if an
2695 error occurs; bfd_get_error will return an appropriate code. */
2696 extern int bfd_get_elf_phdrs
2697 (bfd
*abfd
, void *phdrs
);
2699 /* Exported interface for writing elf corefile notes. */
2700 extern char *elfcore_write_note
2701 (bfd
*, char *, int *, const char *, int, const void *, int);
2702 extern char *elfcore_write_prpsinfo
2703 (bfd
*, char *, int *, const char *, const char *);
2704 extern char *elfcore_write_prstatus
2705 (bfd
*, char *, int *, long, int, const void *);
2706 extern char * elfcore_write_pstatus
2707 (bfd
*, char *, int *, long, int, const void *);
2708 extern char *elfcore_write_prfpreg
2709 (bfd
*, char *, int *, const void *, int);
2710 extern char *elfcore_write_prxfpreg
2711 (bfd
*, char *, int *, const void *, int);
2712 extern char *elfcore_write_xstatereg
2713 (bfd
*, char *, int *, const void *, int);
2714 extern char *elfcore_write_ppc_vmx
2715 (bfd
*, char *, int *, const void *, int);
2716 extern char *elfcore_write_ppc_vsx
2717 (bfd
*, char *, int *, const void *, int);
2718 extern char *elfcore_write_ppc_tar
2719 (bfd
*, char *, int *, const void *, int);
2720 extern char *elfcore_write_ppc_ppr
2721 (bfd
*, char *, int *, const void *, int);
2722 extern char *elfcore_write_ppc_dscr
2723 (bfd
*, char *, int *, const void *, int);
2724 extern char *elfcore_write_ppc_ebb
2725 (bfd
*, char *, int *, const void *, int);
2726 extern char *elfcore_write_ppc_pmu
2727 (bfd
*, char *, int *, const void *, int);
2728 extern char *elfcore_write_ppc_tm_cgpr
2729 (bfd
*, char *, int *, const void *, int);
2730 extern char *elfcore_write_ppc_tm_cfpr
2731 (bfd
*, char *, int *, const void *, int);
2732 extern char *elfcore_write_ppc_tm_cvmx
2733 (bfd
*, char *, int *, const void *, int);
2734 extern char *elfcore_write_ppc_tm_cvsx
2735 (bfd
*, char *, int *, const void *, int);
2736 extern char *elfcore_write_ppc_tm_spr
2737 (bfd
*, char *, int *, const void *, int);
2738 extern char *elfcore_write_ppc_tm_ctar
2739 (bfd
*, char *, int *, const void *, int);
2740 extern char *elfcore_write_ppc_tm_cppr
2741 (bfd
*, char *, int *, const void *, int);
2742 extern char *elfcore_write_ppc_tm_cdscr
2743 (bfd
*, char *, int *, const void *, int);
2744 extern char *elfcore_write_s390_timer
2745 (bfd
*, char *, int *, const void *, int);
2746 extern char *elfcore_write_s390_todcmp
2747 (bfd
*, char *, int *, const void *, int);
2748 extern char *elfcore_write_s390_todpreg
2749 (bfd
*, char *, int *, const void *, int);
2750 extern char *elfcore_write_s390_ctrs
2751 (bfd
*, char *, int *, const void *, int);
2752 extern char *elfcore_write_s390_prefix
2753 (bfd
*, char *, int *, const void *, int);
2754 extern char *elfcore_write_s390_last_break
2755 (bfd
*, char *, int *, const void *, int);
2756 extern char *elfcore_write_s390_system_call
2757 (bfd
*, char *, int *, const void *, int);
2758 extern char *elfcore_write_s390_tdb
2759 (bfd
*, char *, int *, const void *, int);
2760 extern char *elfcore_write_s390_vxrs_low
2761 (bfd
*, char *, int *, const void *, int);
2762 extern char *elfcore_write_s390_vxrs_high
2763 (bfd
*, char *, int *, const void *, int);
2764 extern char *elfcore_write_s390_gs_cb
2765 (bfd
*, char *, int *, const void *, int);
2766 extern char *elfcore_write_s390_gs_bc
2767 (bfd
*, char *, int *, const void *, int);
2768 extern char *elfcore_write_arm_vfp
2769 (bfd
*, char *, int *, const void *, int);
2770 extern char *elfcore_write_aarch_tls
2771 (bfd
*, char *, int *, const void *, int);
2772 extern char *elfcore_write_aarch_hw_break
2773 (bfd
*, char *, int *, const void *, int);
2774 extern char *elfcore_write_aarch_hw_watch
2775 (bfd
*, char *, int *, const void *, int);
2776 extern char *elfcore_write_aarch_sve
2777 (bfd
*, char *, int *, const void *, int);
2778 extern char *elfcore_write_aarch_pauth
2779 (bfd
*, char *, int *, const void *, int);
2780 extern char *elfcore_write_arc_v2
2781 (bfd
*, char *, int *, const void *, int);
2782 extern char *elfcore_write_lwpstatus
2783 (bfd
*, char *, int *, long, int, const void *);
2784 extern char *elfcore_write_register_note
2785 (bfd
*, char *, int *, const char *, const void *, int);
2787 /* Internal structure which holds information to be included in the
2788 PRPSINFO section of Linux core files.
2790 This is an "internal" structure in the sense that it should be used
2791 to pass information to BFD (via the `elfcore_write_linux_prpsinfo'
2792 function), so things like endianess shouldn't be an issue. This
2793 structure will eventually be converted in one of the
2794 `elf_external_linux_*' structures and written out to an output bfd
2795 by one of the functions declared below. */
2797 struct elf_internal_linux_prpsinfo
2799 char pr_state
; /* Numeric process state. */
2800 char pr_sname
; /* Char for pr_state. */
2801 char pr_zomb
; /* Zombie. */
2802 char pr_nice
; /* Nice val. */
2803 unsigned long pr_flag
; /* Flags. */
2804 unsigned int pr_uid
;
2805 unsigned int pr_gid
;
2806 int pr_pid
, pr_ppid
, pr_pgrp
, pr_sid
;
2807 char pr_fname
[16 + 1]; /* Filename of executable. */
2808 char pr_psargs
[80 + 1]; /* Initial part of arg list. */
2811 /* Linux/most 32-bit archs. */
2812 extern char *elfcore_write_linux_prpsinfo32
2813 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
2815 /* Linux/most 64-bit archs. */
2816 extern char *elfcore_write_linux_prpsinfo64
2817 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
2819 extern bfd
*_bfd_elf32_bfd_from_remote_memory
2820 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
2821 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, bfd_size_type
));
2822 extern bfd
*_bfd_elf64_bfd_from_remote_memory
2823 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
2824 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, bfd_size_type
));
2826 extern bfd_vma
bfd_elf_obj_attr_size (bfd
*);
2827 extern void bfd_elf_set_obj_attr_contents (bfd
*, bfd_byte
*, bfd_vma
);
2828 extern int bfd_elf_get_obj_attr_int (bfd
*, int, unsigned int);
2829 extern void bfd_elf_add_obj_attr_int (bfd
*, int, unsigned int, unsigned int);
2830 #define bfd_elf_add_proc_attr_int(BFD, TAG, VALUE) \
2831 bfd_elf_add_obj_attr_int ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2832 extern void bfd_elf_add_obj_attr_string (bfd
*, int, unsigned int, const char *);
2833 #define bfd_elf_add_proc_attr_string(BFD, TAG, VALUE) \
2834 bfd_elf_add_obj_attr_string ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2835 extern void bfd_elf_add_obj_attr_int_string (bfd
*, int, unsigned int,
2836 unsigned int, const char *);
2837 #define bfd_elf_add_proc_attr_int_string(BFD, TAG, INTVAL, STRVAL) \
2838 bfd_elf_add_obj_attr_int_string ((BFD), OBJ_ATTR_PROC, (TAG), \
2841 extern char *_bfd_elf_attr_strdup (bfd
*, const char *);
2842 extern void _bfd_elf_copy_obj_attributes (bfd
*, bfd
*);
2843 extern int _bfd_elf_obj_attrs_arg_type (bfd
*, int, unsigned int);
2844 extern void _bfd_elf_parse_attributes (bfd
*, Elf_Internal_Shdr
*);
2845 extern bfd_boolean _bfd_elf_merge_object_attributes
2846 (bfd
*, struct bfd_link_info
*);
2847 extern bfd_boolean
_bfd_elf_merge_unknown_attribute_low (bfd
*, bfd
*, int);
2848 extern bfd_boolean
_bfd_elf_merge_unknown_attribute_list (bfd
*, bfd
*);
2849 extern Elf_Internal_Shdr
*_bfd_elf_single_rel_hdr (asection
*sec
);
2850 extern bfd_boolean
elf_read_notes (bfd
*, file_ptr
, bfd_size_type
, size_t);
2852 extern bfd_boolean _bfd_elf_parse_gnu_properties
2853 (bfd
*, Elf_Internal_Note
*);
2854 extern elf_property
* _bfd_elf_get_property
2855 (bfd
*, unsigned int, unsigned int);
2856 extern bfd
*_bfd_elf_link_setup_gnu_properties
2857 (struct bfd_link_info
*);
2858 extern bfd_size_type _bfd_elf_convert_gnu_property_size
2860 extern bfd_boolean _bfd_elf_convert_gnu_properties
2861 (bfd
*, asection
*, bfd
*, bfd_byte
**, bfd_size_type
*);
2863 /* The linker may need to keep track of the number of relocs that it
2864 decides to copy as dynamic relocs in check_relocs for each symbol.
2865 This is so that it can later discard them if they are found to be
2866 unnecessary. We can store the information in a field extending the
2867 regular ELF linker hash table. */
2869 struct elf_dyn_relocs
2871 struct elf_dyn_relocs
*next
;
2873 /* The input section of the reloc. */
2876 /* Total number of relocs copied for the input section. */
2877 bfd_size_type count
;
2879 /* Number of pc-relative relocs copied for the input section. */
2880 bfd_size_type pc_count
;
2883 extern bfd_boolean _bfd_elf_create_ifunc_sections
2884 (bfd
*, struct bfd_link_info
*);
2885 extern bfd_boolean _bfd_elf_allocate_ifunc_dyn_relocs
2886 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
2887 struct elf_dyn_relocs
**, unsigned int, unsigned int,
2888 unsigned int, bfd_boolean
);
2890 extern void elf_append_rela (bfd
*, asection
*, Elf_Internal_Rela
*);
2891 extern void elf_append_rel (bfd
*, asection
*, Elf_Internal_Rela
*);
2893 extern bfd_vma
elf64_r_info (bfd_vma
, bfd_vma
);
2894 extern bfd_vma
elf64_r_sym (bfd_vma
);
2895 extern bfd_vma
elf32_r_info (bfd_vma
, bfd_vma
);
2896 extern bfd_vma
elf32_r_sym (bfd_vma
);
2898 extern bfd_boolean
is_debuginfo_file (bfd
*);
2901 extern bfd_boolean _bfd_elf_init_secondary_reloc_section
2902 (bfd
*, Elf_Internal_Shdr
*, const char *, unsigned int);
2903 extern bfd_boolean _bfd_elf_slurp_secondary_reloc_section
2904 (bfd
*, asection
*, asymbol
**);
2905 extern bfd_boolean _bfd_elf_copy_special_section_fields
2906 (const bfd
*, bfd
*, const Elf_Internal_Shdr
*, Elf_Internal_Shdr
*);
2907 extern bfd_boolean _bfd_elf_write_secondary_reloc_section
2908 (bfd
*, asection
*);
2909 extern unsigned int _bfd_elf_symbol_section_index
2910 (bfd
*, elf_symbol_type
*);
2912 extern asection
*_bfd_elf_readonly_dynrelocs
2913 (struct elf_link_hash_entry
*);
2914 extern bfd_boolean _bfd_elf_maybe_set_textrel
2915 (struct elf_link_hash_entry
*, void *);
2917 extern bfd_boolean _bfd_elf_add_dynamic_tags
2918 (bfd
*, struct bfd_link_info
*, bfd_boolean
);
2920 /* Large common section. */
2921 extern asection _bfd_elf_large_com_section
;
2923 /* Hash for local symbol with the first section id, ID, in the input
2924 file and the local symbol index, SYM. */
2925 #define ELF_LOCAL_SYMBOL_HASH(ID, SYM) \
2926 (((((ID) & 0xffU) << 24) | (((ID) & 0xff00) << 8)) \
2927 ^ (SYM) ^ (((ID) & 0xffff0000U) >> 16))
2929 /* This is the condition under which finish_dynamic_symbol will be called.
2930 If our finish_dynamic_symbol isn't called, we'll need to do something
2931 about initializing any .plt and .got entries in relocate_section. */
2932 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
2934 && ((SHARED) || !(H)->forced_local) \
2935 && ((H)->dynindx != -1 || (H)->forced_local))
2937 /* This macro is to avoid lots of duplicated code in the body
2938 of xxx_relocate_section() in the various elfxx-xxxx.c files. */
2939 #define RELOC_FOR_GLOBAL_SYMBOL(info, input_bfd, input_section, rel, \
2940 r_symndx, symtab_hdr, sym_hashes, \
2941 h, sec, relocation, \
2942 unresolved_reloc, warned, ignored) \
2945 /* It seems this can happen with erroneous or unsupported \
2946 input (mixing a.out and elf in an archive, for example.) */ \
2947 if (sym_hashes == NULL) \
2950 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; \
2952 if (info->wrap_hash != NULL \
2953 && (input_section->flags & SEC_DEBUGGING) != 0) \
2954 h = ((struct elf_link_hash_entry *) \
2955 unwrap_hash_lookup (info, input_bfd, &h->root)); \
2957 while (h->root.type == bfd_link_hash_indirect \
2958 || h->root.type == bfd_link_hash_warning) \
2959 h = (struct elf_link_hash_entry *) h->root.u.i.link; \
2963 unresolved_reloc = FALSE; \
2965 if (h->root.type == bfd_link_hash_defined \
2966 || h->root.type == bfd_link_hash_defweak) \
2968 sec = h->root.u.def.section; \
2970 || sec->output_section == NULL) \
2971 /* Set a flag that will be cleared later if we find a \
2972 relocation value for this symbol. output_section \
2973 is typically NULL for symbols satisfied by a shared \
2975 unresolved_reloc = TRUE; \
2977 relocation = (h->root.u.def.value \
2978 + sec->output_section->vma \
2979 + sec->output_offset); \
2981 else if (h->root.type == bfd_link_hash_undefweak) \
2983 else if (info->unresolved_syms_in_objects == RM_IGNORE \
2984 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) \
2986 else if (!bfd_link_relocatable (info)) \
2989 err = (info->unresolved_syms_in_objects == RM_DIAGNOSE && \
2990 !info->warn_unresolved_syms) \
2991 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT; \
2992 (*info->callbacks->undefined_symbol) (info, \
2993 h->root.root.string, \
2996 rel->r_offset, err); \
2999 (void) unresolved_reloc; \
3005 /* This macro is to avoid lots of duplicated code in the body of the
3006 loop over relocations in xxx_relocate_section() in the various
3009 Handle relocations against symbols from removed linkonce sections,
3010 or sections discarded by a linker script. When doing a relocatable
3011 link, we remove such relocations. Otherwise, we just want the
3012 section contents zeroed and avoid any special processing. */
3013 #define RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
3014 rel, count, relend, \
3015 howto, index, contents) \
3018 _bfd_clear_contents (howto, input_bfd, input_section, \
3019 contents, rel[index].r_offset); \
3021 if (bfd_link_relocatable (info) \
3022 && (input_section->flags & SEC_DEBUGGING)) \
3024 /* Only remove relocations in debug sections since other \
3025 sections may require relocations. */ \
3026 Elf_Internal_Shdr *rel_hdr; \
3028 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
3030 /* Avoid empty output section. */ \
3031 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
3033 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
3034 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
3035 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
3037 memmove (rel, rel + count, \
3038 (relend - rel - count) * sizeof (*rel)); \
3040 input_section->reloc_count -= count; \
3047 for (i_ = 0; i_ < count; i_++) \
3049 rel[i_].r_info = 0; \
3050 rel[i_].r_addend = 0; \
3056 /* Will a symbol be bound to the definition within the shared
3057 library, if any. A unique symbol can never be bound locally. */
3058 #define SYMBOLIC_BIND(INFO, H) \
3059 (!(H)->unique_global \
3060 && ((INFO)->symbolic \
3061 || (H)->start_stop \
3062 || ((INFO)->dynamic && !(H)->dynamic)))
3064 /* Determine if a section contains CTF data, using its name. */
3065 static inline bfd_boolean
3066 bfd_section_is_ctf (const asection
*sec
)
3068 const char *name
= bfd_section_name (sec
);
3069 return strncmp (name
, ".ctf", 4) == 0 && (name
[4] == 0 || name
[4] == '.');
3075 #endif /* _LIBELF_H_ */