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 /* The BFD used to hold special sections created by the linker.
577 This will be the first BFD found which requires these sections to
581 /* The value to use when initialising got.refcount/offset and
582 plt.refcount/offset in an elf_link_hash_entry. Set to zero when
583 the values are refcounts. Set to init_got_offset/init_plt_offset
584 in size_dynamic_sections when the values may be offsets. */
585 union gotplt_union init_got_refcount
;
586 union gotplt_union init_plt_refcount
;
588 /* The value to use for got.refcount/offset and plt.refcount/offset
589 when the values may be offsets. Normally (bfd_vma) -1. */
590 union gotplt_union init_got_offset
;
591 union gotplt_union init_plt_offset
;
593 /* The number of symbols found in the link which is intended for the
594 mandatory DT_SYMTAB tag (.dynsym section) in .dynamic section. */
595 bfd_size_type dynsymcount
;
596 bfd_size_type local_dynsymcount
;
598 /* The string table of dynamic symbols, which becomes the .dynstr
600 struct elf_strtab_hash
*dynstr
;
602 /* The number of symbol strings found in the link which must be put
603 into the .strtab section. */
604 bfd_size_type strtabcount
;
606 /* The array size of the symbol string table, which becomes the
608 bfd_size_type strtabsize
;
610 /* The array of strings, which becomes the .strtab section. */
611 struct elf_sym_strtab
*strtab
;
613 /* The number of buckets in the hash table in the .hash section.
614 This is based on the number of dynamic symbols. */
615 bfd_size_type bucketcount
;
617 /* A linked list of DT_NEEDED names found in dynamic objects
618 included in the link. */
619 struct bfd_link_needed_list
*needed
;
621 /* Sections in the output bfd that provides a section symbol
622 to be used by relocations emitted against local symbols.
623 Most targets will not use data_index_section. */
624 asection
*text_index_section
;
625 asection
*data_index_section
;
627 /* The _GLOBAL_OFFSET_TABLE_ symbol. */
628 struct elf_link_hash_entry
*hgot
;
630 /* The _PROCEDURE_LINKAGE_TABLE_ symbol. */
631 struct elf_link_hash_entry
*hplt
;
633 /* The _DYNAMIC symbol. */
634 struct elf_link_hash_entry
*hdynamic
;
636 /* A pointer to information used to merge SEC_MERGE sections. */
639 /* Used to link stabs in sections. */
640 struct stab_info stab_info
;
642 /* Used by eh_frame code when editing .eh_frame. */
643 struct eh_frame_hdr_info eh_info
;
645 /* A linked list of local symbols to be added to .dynsym. */
646 struct elf_link_local_dynamic_entry
*dynlocal
;
648 /* A linked list of DT_RPATH/DT_RUNPATH names found in dynamic
649 objects included in the link. */
650 struct bfd_link_needed_list
*runpath
;
652 /* Cached first output tls section and size of PT_TLS segment. */
654 bfd_size_type tls_size
; /* Bytes. */
656 /* The offset into splt of the PLT entry for the TLS descriptor
657 resolver. Special values are 0, if not necessary (or not found
658 to be necessary yet), and -1 if needed but not determined
662 /* The GOT offset for the lazy trampoline. Communicated to the
663 loader via DT_TLSDESC_GOT. The magic value (bfd_vma) -1
664 indicates an offset is not allocated. */
667 /* Target OS for linker output. */
668 enum elf_target_os target_os
;
670 /* A linked list of dynamic BFD's loaded in the link. */
671 struct elf_link_loaded_list
*dyn_loaded
;
673 /* Short-cuts to get to dynamic linker sections. */
682 asection
*sreldynrelro
;
690 /* Look up an entry in an ELF linker hash table. */
692 #define elf_link_hash_lookup(table, string, create, copy, follow) \
693 ((struct elf_link_hash_entry *) \
694 bfd_link_hash_lookup (&(table)->root, (string), (create), \
697 /* Traverse an ELF linker hash table. */
699 #define elf_link_hash_traverse(table, func, info) \
700 (bfd_link_hash_traverse \
702 (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func), \
705 /* Get the ELF linker hash table from a link_info structure. */
707 #define elf_hash_table(p) ((struct elf_link_hash_table *) ((p)->hash))
709 #define elf_hash_table_id(table) ((table) -> hash_table_id)
711 /* Returns TRUE if the hash table is a struct elf_link_hash_table. */
712 #define is_elf_hash_table(htab) \
713 (((struct bfd_link_hash_table *) (htab))->type == bfd_link_elf_hash_table)
715 /* Used by bfd_sym_from_r_symndx to cache a small number of local
717 #define LOCAL_SYM_CACHE_SIZE 32
721 unsigned long indx
[LOCAL_SYM_CACHE_SIZE
];
722 Elf_Internal_Sym sym
[LOCAL_SYM_CACHE_SIZE
];
725 /* Constant information held for an ELF backend. */
727 struct elf_size_info
{
728 unsigned char sizeof_ehdr
, sizeof_phdr
, sizeof_shdr
;
729 unsigned char sizeof_rel
, sizeof_rela
, sizeof_sym
, sizeof_dyn
, sizeof_note
;
731 /* The size of entries in the .hash section. */
732 unsigned char sizeof_hash_entry
;
734 /* The number of internal relocations to allocate per external
736 unsigned char int_rels_per_ext_rel
;
737 /* We use some fixed size arrays. This should be large enough to
738 handle all back-ends. */
739 #define MAX_INT_RELS_PER_EXT_REL 3
741 unsigned char arch_size
, log_file_align
;
742 unsigned char elfclass
, ev_current
;
743 int (*write_out_phdrs
)
744 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
746 (*write_shdrs_and_ehdr
) (bfd
*);
747 bfd_boolean (*checksum_contents
)
748 (bfd
* , void (*) (const void *, size_t, void *), void *);
750 (bfd
*, asection
*, void *);
751 bfd_boolean (*swap_symbol_in
)
752 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
753 void (*swap_symbol_out
)
754 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
755 bfd_boolean (*slurp_reloc_table
)
756 (bfd
*, asection
*, asymbol
**, bfd_boolean
);
757 long (*slurp_symbol_table
)
758 (bfd
*, asymbol
**, bfd_boolean
);
760 (bfd
*, const void *, Elf_Internal_Dyn
*);
762 (bfd
*, const Elf_Internal_Dyn
*, void *);
764 /* This function is called to swap in a REL relocation. If an
765 external relocation corresponds to more than one internal
766 relocation, then all relocations are swapped in at once. */
767 void (*swap_reloc_in
)
768 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
770 /* This function is called to swap out a REL relocation. */
771 void (*swap_reloc_out
)
772 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
774 /* This function is called to swap in a RELA relocation. If an
775 external relocation corresponds to more than one internal
776 relocation, then all relocations are swapped in at once. */
777 void (*swap_reloca_in
)
778 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
780 /* This function is called to swap out a RELA relocation. */
781 void (*swap_reloca_out
)
782 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
785 #define elf_symbol_from(ABFD,S) \
786 (((S)->the_bfd != NULL \
787 && (S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \
788 && (S)->the_bfd->tdata.elf_obj_data != 0) \
789 ? (elf_symbol_type *) (S) \
792 enum elf_reloc_type_class
{
794 reloc_class_relative
,
800 struct elf_reloc_cookie
802 Elf_Internal_Rela
*rels
, *rel
, *relend
;
803 Elf_Internal_Sym
*locsyms
;
807 struct elf_link_hash_entry
**sym_hashes
;
809 bfd_boolean bad_symtab
;
812 /* The level of IRIX compatibility we're striving for. */
820 /* Mapping of ELF section names and types. */
821 struct bfd_elf_special_section
824 unsigned int prefix_length
;
825 /* 0 means name must match PREFIX exactly.
826 -1 means name must start with PREFIX followed by an arbitrary string.
827 -2 means name must match PREFIX exactly or consist of PREFIX followed
828 by a dot then anything.
829 > 0 means name must start with the first PREFIX_LENGTH chars of
830 PREFIX and finish with the last SUFFIX_LENGTH chars of PREFIX. */
831 signed int suffix_length
;
836 enum action_discarded
842 typedef asection
* (*elf_gc_mark_hook_fn
)
843 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
844 struct elf_link_hash_entry
*, Elf_Internal_Sym
*);
846 enum elf_property_kind
848 /* A new property. */
849 property_unknown
= 0,
850 /* A property ignored by backend. */
852 /* A corrupt property reported by backend. */
854 /* A property should be removed due to property merge. */
856 /* A property which is a number. */
860 typedef struct elf_property
862 unsigned int pr_type
;
863 unsigned int pr_datasz
;
866 /* For property_number, this is a number. */
868 /* Add a new one if elf_property_kind is updated. */
870 enum elf_property_kind pr_kind
;
873 typedef struct elf_property_list
875 struct elf_property_list
*next
;
876 struct elf_property property
;
879 struct bfd_elf_section_reloc_data
;
881 struct elf_backend_data
883 /* The architecture for this backend. */
884 enum bfd_architecture arch
;
886 /* An identifier used to distinguish different target specific
887 extensions to elf_obj_tdata and elf_link_hash_table structures. */
888 enum elf_target_id target_id
;
891 enum elf_target_os target_os
;
893 /* The ELF machine code (EM_xxxx) for this backend. */
894 int elf_machine_code
;
899 /* The maximum page size for this backend. */
902 /* The minimum page size for this backend. An input object will not be
903 considered page aligned unless its sections are correctly aligned for
904 pages at least this large. May be smaller than maxpagesize. */
907 /* The common page size for this backend. */
908 bfd_vma commonpagesize
;
910 /* The value of commonpagesize to use when -z relro for this backend. */
911 bfd_vma relropagesize
;
913 /* The BFD flags applied to sections created for dynamic linking. */
914 flagword dynamic_sec_flags
;
916 /* Architecture-specific data for this backend.
917 This is actually a pointer to some type like struct elf_ARCH_data. */
918 const void *arch_data
;
920 /* A function to translate an ELF RELA relocation to a BFD arelent
921 structure. Returns TRUE upon success, FALSE otherwise. */
922 bfd_boolean (*elf_info_to_howto
)
923 (bfd
*, arelent
*, Elf_Internal_Rela
*);
925 /* A function to translate an ELF REL relocation to a BFD arelent
926 structure. Returns TRUE upon success, FALSE otherwise. */
927 bfd_boolean (*elf_info_to_howto_rel
)
928 (bfd
*, arelent
*, Elf_Internal_Rela
*);
930 /* A function to determine whether a symbol is global when
931 partitioning the symbol table into local and global symbols.
932 This should be NULL for most targets, in which case the correct
933 thing will be done. MIPS ELF, at least on the Irix 5, has
934 special requirements. */
935 bfd_boolean (*elf_backend_sym_is_global
)
938 /* The remaining functions are hooks which are called only if they
941 /* A function to permit a backend specific check on whether a
942 particular BFD format is relevant for an object file, and to
943 permit the backend to set any global information it wishes. When
944 this is called elf_elfheader is set, but anything else should be
945 used with caution. If this returns FALSE, the check_format
946 routine will return a bfd_error_wrong_format error. */
947 bfd_boolean (*elf_backend_object_p
)
950 /* A function to do additional symbol processing when reading the
951 ELF symbol table. This is where any processor-specific special
952 section indices are handled. */
953 void (*elf_backend_symbol_processing
)
956 /* A function to do additional symbol processing after reading the
957 entire ELF symbol table. */
958 bfd_boolean (*elf_backend_symbol_table_processing
)
959 (bfd
*, elf_symbol_type
*, unsigned int);
961 /* A function to set the type of the info field. Processor-specific
962 types should be handled here. */
963 int (*elf_backend_get_symbol_type
)
964 (Elf_Internal_Sym
*, int);
966 /* A function to return the linker hash table entry of a symbol that
967 might be satisfied by an archive symbol. */
968 struct elf_link_hash_entry
* (*elf_backend_archive_symbol_lookup
)
969 (bfd
*, struct bfd_link_info
*, const char *);
971 /* Return true if local section symbols should have a non-null st_name.
972 NULL implies false. */
973 bfd_boolean (*elf_backend_name_local_section_symbols
)
976 /* A function to do additional processing on the ELF section header
977 just before writing it out. This is used to set the flags and
978 type fields for some sections, or to actually write out data for
980 bfd_boolean (*elf_backend_section_processing
)
981 (bfd
*, Elf_Internal_Shdr
*);
983 /* A function to handle unusual section types when creating BFD
984 sections from ELF sections. */
985 bfd_boolean (*elf_backend_section_from_shdr
)
986 (bfd
*, Elf_Internal_Shdr
*, const char *, int);
988 /* A function to convert machine dependent ELF section header flags to
989 BFD internal section header flags. */
990 bfd_boolean (*elf_backend_section_flags
)
991 (const Elf_Internal_Shdr
*);
993 /* A function that returns a struct containing ELF section flags and
994 type for the given BFD section. */
995 const struct bfd_elf_special_section
* (*get_sec_type_attr
)
998 /* A function to handle unusual program segment types when creating BFD
999 sections from ELF program segments. */
1000 bfd_boolean (*elf_backend_section_from_phdr
)
1001 (bfd
*, Elf_Internal_Phdr
*, int, const char *);
1003 /* A function to set up the ELF section header for a BFD section in
1004 preparation for writing it out. This is where the flags and type
1005 fields are set for unusual sections. */
1006 bfd_boolean (*elf_backend_fake_sections
)
1007 (bfd
*, Elf_Internal_Shdr
*, asection
*);
1009 /* A function to get the ELF section index for a BFD section. If
1010 this returns TRUE, the section was found. If it is a normal ELF
1011 section, *RETVAL should be left unchanged. If it is not a normal
1012 ELF section *RETVAL should be set to the SHN_xxxx index. */
1013 bfd_boolean (*elf_backend_section_from_bfd_section
)
1014 (bfd
*, asection
*, int *retval
);
1016 /* If this field is not NULL, it is called by the add_symbols phase
1017 of a link just before adding a symbol to the global linker hash
1018 table. It may modify any of the fields as it wishes. If *NAME
1019 is set to NULL, the symbol will be skipped rather than being
1020 added to the hash table. This function is responsible for
1021 handling all processor dependent symbol bindings and section
1022 indices, and must set at least *FLAGS and *SEC for each processor
1023 dependent case; failure to do so will cause a link error. */
1024 bfd_boolean (*elf_add_symbol_hook
)
1025 (bfd
*abfd
, struct bfd_link_info
*info
, Elf_Internal_Sym
*,
1026 const char **name
, flagword
*flags
, asection
**sec
, bfd_vma
*value
);
1028 /* If this field is not NULL, it is called by the elf_link_output_sym
1029 phase of a link for each symbol which will appear in the object file.
1030 On error, this function returns 0. 1 is returned when the symbol
1031 should be output, 2 is returned when the symbol should be discarded. */
1032 int (*elf_backend_link_output_symbol_hook
)
1033 (struct bfd_link_info
*info
, const char *, Elf_Internal_Sym
*,
1034 asection
*, struct elf_link_hash_entry
*);
1036 /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend
1037 linker the first time it encounters a dynamic object in the link.
1038 This function must create any sections required for dynamic
1039 linking. The ABFD argument is a dynamic object. The .interp,
1040 .dynamic, .dynsym, .dynstr, and .hash functions have already been
1041 created, and this function may modify the section flags if
1042 desired. This function will normally create the .got and .plt
1043 sections, but different backends have different requirements. */
1044 bfd_boolean (*elf_backend_create_dynamic_sections
)
1045 (bfd
*abfd
, struct bfd_link_info
*info
);
1047 /* When creating a shared library, determine whether to omit the
1048 dynamic symbol for the section. */
1049 bfd_boolean (*elf_backend_omit_section_dynsym
)
1050 (bfd
*output_bfd
, struct bfd_link_info
*info
, asection
*osec
);
1052 /* Return TRUE if relocations of targets are compatible to the extent
1053 that CHECK_RELOCS will properly process them. PR 4424. */
1054 bfd_boolean (*relocs_compatible
) (const bfd_target
*, const bfd_target
*);
1056 /* The CHECK_RELOCS function is called by the add_symbols phase of
1057 the ELF backend linker. It is called once for each section with
1058 relocs of an object file, just after the symbols for the object
1059 file have been added to the global linker hash table. The
1060 function must look through the relocs and do any special handling
1061 required. This generally means allocating space in the global
1062 offset table, and perhaps allocating space for a reloc. The
1063 relocs are always passed as Rela structures; if the section
1064 actually uses Rel structures, the r_addend field will always be
1066 bfd_boolean (*check_relocs
)
1067 (bfd
*abfd
, struct bfd_link_info
*info
, asection
*o
,
1068 const Elf_Internal_Rela
*relocs
);
1070 /* The CHECK_DIRECTIVES function is called once per input file by
1071 the add_symbols phase of the ELF backend linker. The function
1072 must inspect the bfd and create any additional symbols according
1073 to any custom directives in the bfd. */
1074 bfd_boolean (*check_directives
)
1075 (bfd
*abfd
, struct bfd_link_info
*info
);
1077 /* The NOTICE_AS_NEEDED function is called as the linker is about to
1078 handle an as-needed lib (ACT = notice_as_needed), and after the
1079 linker has decided to keep the lib (ACT = notice_needed) or when
1080 the lib is not needed (ACT = notice_not_needed). */
1081 bfd_boolean (*notice_as_needed
)
1082 (bfd
*abfd
, struct bfd_link_info
*info
, enum notice_asneeded_action act
);
1084 /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
1085 linker for every symbol which is defined by a dynamic object and
1086 referenced by a regular object. This is called after all the
1087 input files have been seen, but before the SIZE_DYNAMIC_SECTIONS
1088 function has been called. The hash table entry should be
1089 bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be
1090 defined in a section from a dynamic object. Dynamic object
1091 sections are not included in the final link, and this function is
1092 responsible for changing the value to something which the rest of
1093 the link can deal with. This will normally involve adding an
1094 entry to the .plt or .got or some such section, and setting the
1095 symbol to point to that. */
1096 bfd_boolean (*elf_backend_adjust_dynamic_symbol
)
1097 (struct bfd_link_info
*info
, struct elf_link_hash_entry
*h
);
1099 /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker
1100 after all the linker input files have been seen but before the
1101 section sizes have been set. This is called after
1102 ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS. */
1103 bfd_boolean (*elf_backend_always_size_sections
)
1104 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1106 /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend
1107 linker after all the linker input files have been seen but before
1108 the sections sizes have been set. This is called after
1109 ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols.
1110 It is only called when linking against a dynamic object. It must
1111 set the sizes of the dynamic sections, and may fill in their
1112 contents as well. The generic ELF linker can handle the .dynsym,
1113 .dynstr and .hash sections. This function must handle the
1114 .interp section and any sections created by the
1115 CREATE_DYNAMIC_SECTIONS entry point. */
1116 bfd_boolean (*elf_backend_size_dynamic_sections
)
1117 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1119 /* The STRIP_ZERO_SIZED_DYNAMIC_SECTIONS function is called by the
1120 ELF backend linker to strip zero-sized dynamic sections after
1121 the section sizes have been set. */
1122 bfd_boolean (*elf_backend_strip_zero_sized_dynamic_sections
)
1123 (struct bfd_link_info
*info
);
1125 /* Set TEXT_INDEX_SECTION and DATA_INDEX_SECTION, the output sections
1126 we keep to use as a base for relocs and symbols. */
1127 void (*elf_backend_init_index_section
)
1128 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1130 /* The RELOCATE_SECTION function is called by the ELF backend linker
1131 to handle the relocations for a section.
1133 The relocs are always passed as Rela structures; if the section
1134 actually uses Rel structures, the r_addend field will always be
1137 This function is responsible for adjust the section contents as
1138 necessary, and (if using Rela relocs and generating a
1139 relocatable output file) adjusting the reloc addend as
1142 This function does not have to worry about setting the reloc
1143 address or the reloc symbol index.
1145 LOCAL_SYMS is a pointer to the swapped in local symbols.
1147 LOCAL_SECTIONS is an array giving the section in the input file
1148 corresponding to the st_shndx field of each local symbol.
1150 The global hash table entry for the global symbols can be found
1151 via elf_sym_hashes (input_bfd).
1153 When generating relocatable output, this function must handle
1154 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
1155 going to be the section symbol corresponding to the output
1156 section, which means that the addend must be adjusted
1159 Returns FALSE on error, TRUE on success, 2 if successful and
1160 relocations should be written for this section. */
1161 int (*elf_backend_relocate_section
)
1162 (bfd
*output_bfd
, struct bfd_link_info
*info
, bfd
*input_bfd
,
1163 asection
*input_section
, bfd_byte
*contents
, Elf_Internal_Rela
*relocs
,
1164 Elf_Internal_Sym
*local_syms
, asection
**local_sections
);
1166 /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend
1167 linker just before it writes a symbol out to the .dynsym section.
1168 The processor backend may make any required adjustment to the
1169 symbol. It may also take the opportunity to set contents of the
1170 dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on
1171 all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called
1172 on those symbols which are defined by a dynamic object. */
1173 bfd_boolean (*elf_backend_finish_dynamic_symbol
)
1174 (bfd
*output_bfd
, struct bfd_link_info
*info
,
1175 struct elf_link_hash_entry
*h
, Elf_Internal_Sym
*sym
);
1177 /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend
1178 linker just before it writes all the dynamic sections out to the
1179 output file. The FINISH_DYNAMIC_SYMBOL will have been called on
1180 all dynamic symbols. */
1181 bfd_boolean (*elf_backend_finish_dynamic_sections
)
1182 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1184 /* A function to do any beginning processing needed for the ELF file
1185 before building the ELF headers and computing file positions. */
1186 void (*elf_backend_begin_write_processing
)
1187 (bfd
*, struct bfd_link_info
*);
1189 /* A function to do any final processing needed for the ELF file
1190 before writing it out. */
1191 bfd_boolean (*elf_backend_final_write_processing
)
1194 /* This function is called by get_program_header_size. It should
1195 return the number of additional program segments which this BFD
1196 will need. It should return -1 on error. */
1197 int (*elf_backend_additional_program_headers
)
1198 (bfd
*, struct bfd_link_info
*);
1200 /* This function is called to modify an existing segment map in a
1201 backend specific fashion. */
1202 bfd_boolean (*elf_backend_modify_segment_map
)
1203 (bfd
*, struct bfd_link_info
*);
1205 /* This function is called to modify program headers just before
1206 they are written. */
1207 bfd_boolean (*elf_backend_modify_headers
)
1208 (bfd
*, struct bfd_link_info
*);
1210 /* This function is called to see if the PHDR header should be
1211 checked for validity. */
1212 bfd_boolean (*elf_backend_allow_non_load_phdr
)
1213 (bfd
*, const Elf_Internal_Phdr
*, unsigned);
1215 /* This function is called before section garbage collection to
1216 mark entry symbol sections. */
1218 (struct bfd_link_info
*);
1220 /* This function is called during section garbage collection to
1221 mark sections that define global symbols. */
1222 bfd_boolean (*gc_mark_dynamic_ref
)
1223 (struct elf_link_hash_entry
*, void *);
1225 /* This function is called during section gc to discover the section a
1226 particular relocation refers to. */
1227 elf_gc_mark_hook_fn gc_mark_hook
;
1229 /* This function, if defined, is called after the first gc marking pass
1230 to allow the backend to mark additional sections. */
1231 bfd_boolean (*gc_mark_extra_sections
)
1232 (struct bfd_link_info
*, elf_gc_mark_hook_fn
);
1234 /* This function is called to initialise ELF file header info.
1235 Customised versions can modify things like the OS and ABI version. */
1236 bfd_boolean (*elf_backend_init_file_header
)
1237 (bfd
*, struct bfd_link_info
*);
1239 /* This function, if defined, prints a symbol to file and returns the
1240 name of the symbol to be printed. It should return NULL to fall
1241 back to default symbol printing. */
1242 const char *(*elf_backend_print_symbol_all
)
1243 (bfd
*, void *, asymbol
*);
1245 /* This function, if defined, is called after all local symbols and
1246 global symbols converted to locals are emitted into the symtab
1247 section. It allows the backend to emit special local symbols
1248 not handled in the hash table. */
1249 bfd_boolean (*elf_backend_output_arch_local_syms
)
1250 (bfd
*, struct bfd_link_info
*, void *,
1251 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym
*, asection
*,
1252 struct elf_link_hash_entry
*));
1254 /* This function, if defined, is called after all symbols are emitted
1255 into the symtab section. It allows the backend to emit special
1256 global symbols not handled in the hash table. */
1257 bfd_boolean (*elf_backend_output_arch_syms
)
1258 (bfd
*, struct bfd_link_info
*, void *,
1259 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym
*, asection
*,
1260 struct elf_link_hash_entry
*));
1262 /* Filter what symbols of the output file to include in the import
1263 library if one is created. */
1264 unsigned int (*elf_backend_filter_implib_symbols
)
1265 (bfd
*, struct bfd_link_info
*, asymbol
**, long);
1267 /* Copy any information related to dynamic linking from a pre-existing
1268 symbol to a newly created symbol. Also called to copy flags and
1269 other back-end info to a weakdef, in which case the symbol is not
1270 newly created and plt/got refcounts and dynamic indices should not
1272 void (*elf_backend_copy_indirect_symbol
)
1273 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
1274 struct elf_link_hash_entry
*);
1276 /* Modify any information related to dynamic linking such that the
1277 symbol is not exported. */
1278 void (*elf_backend_hide_symbol
)
1279 (struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd_boolean
);
1281 /* A function to do additional symbol fixup, called by
1282 _bfd_elf_fix_symbol_flags. */
1283 bfd_boolean (*elf_backend_fixup_symbol
)
1284 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
1286 /* Merge the backend specific symbol attribute. */
1287 void (*elf_backend_merge_symbol_attribute
)
1288 (struct elf_link_hash_entry
*, const Elf_Internal_Sym
*, bfd_boolean
,
1291 /* This function, if defined, will return a string containing the
1292 name of a target-specific dynamic tag. */
1293 char *(*elf_backend_get_target_dtag
)
1296 /* Decide whether an undefined symbol is special and can be ignored.
1297 This is the case for OPTIONAL symbols on IRIX. */
1298 bfd_boolean (*elf_backend_ignore_undef_symbol
)
1299 (struct elf_link_hash_entry
*);
1301 /* Emit relocations. Overrides default routine for emitting relocs,
1302 except during a relocatable link, or if all relocs are being emitted. */
1303 bfd_boolean (*elf_backend_emit_relocs
)
1304 (bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*,
1305 struct elf_link_hash_entry
**);
1307 /* Update relocations. It is allowed to change the number and the order.
1308 In such a case hashes should be invalidated. */
1309 void (*elf_backend_update_relocs
)
1310 (asection
*, struct bfd_elf_section_reloc_data
*);
1312 /* Count relocations. Not called for relocatable links
1313 or if all relocs are being preserved in the output. */
1314 unsigned int (*elf_backend_count_relocs
)
1315 (struct bfd_link_info
*, asection
*);
1317 /* Count additionals relocations. Called for relocatable links if
1318 additional relocations needs to be created. */
1319 unsigned int (*elf_backend_count_additional_relocs
)
1322 /* Say whether to sort relocs output by ld -r and ld --emit-relocs,
1323 by r_offset. If NULL, default to true. */
1324 bfd_boolean (*sort_relocs_p
)
1327 /* This function, if defined, is called when an NT_PRSTATUS note is found
1329 bfd_boolean (*elf_backend_grok_prstatus
)
1330 (bfd
*, Elf_Internal_Note
*);
1332 /* This function, if defined, is called when an NT_PSINFO or NT_PRPSINFO
1333 note is found in a core file. */
1334 bfd_boolean (*elf_backend_grok_psinfo
)
1335 (bfd
*, Elf_Internal_Note
*);
1337 /* This function, if defined, is called when a "FreeBSD" NT_PRSTATUS
1338 note is found in a core file. */
1339 bfd_boolean (*elf_backend_grok_freebsd_prstatus
)
1340 (bfd
*, Elf_Internal_Note
*);
1342 /* This function, if defined, is called to write a note to a corefile. */
1343 char *(*elf_backend_write_core_note
)
1344 (bfd
*abfd
, char *buf
, int *bufsiz
, int note_type
, ...);
1346 /* This function, if defined, is called to convert target-specific
1347 section flag names into hex values. */
1348 flagword (*elf_backend_lookup_section_flags_hook
)
1351 /* This function returns class of a reloc type. */
1352 enum elf_reloc_type_class (*elf_backend_reloc_type_class
)
1353 (const struct bfd_link_info
*, const asection
*, const Elf_Internal_Rela
*);
1355 /* This function, if defined, removes information about discarded functions
1356 from other sections which mention them. */
1357 bfd_boolean (*elf_backend_discard_info
)
1358 (bfd
*, struct elf_reloc_cookie
*, struct bfd_link_info
*);
1360 /* This function, if defined, signals that the function above has removed
1361 the discarded relocations for this section. */
1362 bfd_boolean (*elf_backend_ignore_discarded_relocs
)
1365 /* What to do when ld finds relocations against symbols defined in
1366 discarded sections. */
1367 unsigned int (*action_discarded
)
1370 /* This function returns the width of FDE pointers in bytes, or 0 if
1371 that can't be determined for some reason. The default definition
1372 goes by the bfd's EI_CLASS. */
1373 unsigned int (*elf_backend_eh_frame_address_size
)
1374 (bfd
*, const asection
*);
1376 /* These functions tell elf-eh-frame whether to attempt to turn
1377 absolute or lsda encodings into pc-relative ones. The default
1378 definition enables these transformations. */
1379 bfd_boolean (*elf_backend_can_make_relative_eh_frame
)
1380 (bfd
*, struct bfd_link_info
*, asection
*);
1381 bfd_boolean (*elf_backend_can_make_lsda_relative_eh_frame
)
1382 (bfd
*, struct bfd_link_info
*, asection
*);
1384 /* This function returns an encoding after computing the encoded
1385 value (and storing it in ENCODED) for the given OFFSET into OSEC,
1386 to be stored in at LOC_OFFSET into the LOC_SEC input section.
1387 The default definition chooses a 32-bit PC-relative encoding. */
1388 bfd_byte (*elf_backend_encode_eh_address
)
1389 (bfd
*abfd
, struct bfd_link_info
*info
,
1390 asection
*osec
, bfd_vma offset
,
1391 asection
*loc_sec
, bfd_vma loc_offset
,
1394 /* This function, if defined, may write out the given section.
1395 Returns TRUE if it did so and FALSE if the caller should. */
1396 bfd_boolean (*elf_backend_write_section
)
1397 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
1399 /* The level of IRIX compatibility we're striving for.
1400 MIPS ELF specific function. */
1401 irix_compat_t (*elf_backend_mips_irix_compat
)
1404 reloc_howto_type
*(*elf_backend_mips_rtype_to_howto
)
1405 (bfd
*, unsigned int, bfd_boolean
);
1407 /* The swapping table to use when dealing with ECOFF information.
1408 Used for the MIPS ELF .mdebug section. */
1409 const struct ecoff_debug_swap
*elf_backend_ecoff_debug_swap
;
1411 /* This function implements `bfd_elf_bfd_from_remote_memory';
1412 see elf.c, elfcode.h. */
1413 bfd
*(*elf_backend_bfd_from_remote_memory
)
1414 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
1415 int (*target_read_memory
) (bfd_vma vma
, bfd_byte
*myaddr
,
1416 bfd_size_type len
));
1418 bfd_boolean (*elf_backend_core_find_build_id
) (bfd
*, bfd_vma
);
1420 /* This function is used by `_bfd_elf_get_synthetic_symtab';
1422 bfd_vma (*plt_sym_val
) (bfd_vma
, const asection
*, const arelent
*);
1424 /* Is symbol defined in common section? */
1425 bfd_boolean (*common_definition
) (Elf_Internal_Sym
*);
1427 /* Return a common section index for section. */
1428 unsigned int (*common_section_index
) (asection
*);
1430 /* Return a common section for section. */
1431 asection
*(*common_section
) (asection
*);
1433 /* Return TRUE if we can merge 2 definitions. */
1434 bfd_boolean (*merge_symbol
) (struct elf_link_hash_entry
*,
1435 const Elf_Internal_Sym
*, asection
**,
1436 bfd_boolean
, bfd_boolean
,
1437 bfd
*, const asection
*);
1439 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
1440 bfd_boolean (*elf_hash_symbol
) (struct elf_link_hash_entry
*);
1442 /* If non-NULL, called to register the location of XLAT_LOC within
1443 .MIPS.xhash at which real final dynindx for H will be written.
1444 If XLAT_LOC is zero, the symbol is not included in
1445 .MIPS.xhash and no dynindx will be written. */
1446 void (*record_xhash_symbol
)
1447 (struct elf_link_hash_entry
*h
, bfd_vma xlat_loc
);
1449 /* Return TRUE if type is a function symbol type. */
1450 bfd_boolean (*is_function_type
) (unsigned int type
);
1452 /* If the ELF symbol SYM might be a function in SEC, return the
1453 function size and set *CODE_OFF to the function's entry point,
1454 otherwise return zero. */
1455 bfd_size_type (*maybe_function_sym
) (const asymbol
*sym
, asection
*sec
,
1458 /* Given NAME, the name of a relocation section stripped of its
1459 .rel/.rela prefix, return the section in ABFD to which the
1460 relocations apply. */
1461 asection
*(*get_reloc_section
) (bfd
*abfd
, const char *name
);
1463 /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
1464 has a type >= SHT_LOOS. Returns TRUE if the fields were initialised,
1465 FALSE otherwise. Can be called multiple times for a given section,
1466 until it returns TRUE. Most of the times it is called ISECTION will be
1467 set to an input section that might be associated with the output section.
1468 The last time that it is called, ISECTION will be set to NULL. */
1469 bfd_boolean (*elf_backend_copy_special_section_fields
)
1470 (const bfd
*ibfd
, bfd
*obfd
, const Elf_Internal_Shdr
*isection
,
1471 Elf_Internal_Shdr
*osection
);
1473 /* Used to handle bad SHF_LINK_ORDER input. */
1474 void (*link_order_error_handler
) (const char *, ...);
1476 /* Name of the PLT relocation section. */
1477 const char *relplt_name
;
1479 /* Alternate EM_xxxx machine codes for this backend. */
1480 int elf_machine_alt1
;
1481 int elf_machine_alt2
;
1483 const struct elf_size_info
*s
;
1485 /* An array of target specific special sections. */
1486 const struct bfd_elf_special_section
*special_sections
;
1488 /* The size in bytes of the header for the GOT. This includes the
1489 so-called reserved entries on some systems. */
1490 bfd_vma got_header_size
;
1492 /* The size of the GOT entry for the symbol pointed to by H if non-NULL,
1493 otherwise by the local symbol with index SYMNDX in IBFD. */
1494 bfd_vma (*got_elt_size
) (bfd
*, struct bfd_link_info
*,
1495 struct elf_link_hash_entry
*h
,
1496 bfd
*ibfd
, unsigned long symndx
);
1498 /* The vendor name to use for a processor-standard attributes section. */
1499 const char *obj_attrs_vendor
;
1501 /* The section name to use for a processor-standard attributes section. */
1502 const char *obj_attrs_section
;
1504 /* Return 1, 2 or 3 to indicate what type of arguments a
1505 processor-specific tag takes. */
1506 int (*obj_attrs_arg_type
) (int);
1508 /* The section type to use for an attributes section. */
1509 unsigned int obj_attrs_section_type
;
1511 /* This function determines the order in which any attributes are
1512 written. It must be defined for input in the range
1513 LEAST_KNOWN_OBJ_ATTRIBUTE..NUM_KNOWN_OBJ_ATTRIBUTES-1 (this range
1514 is used in order to make unity easy). The returned value is the
1515 actual tag number to place in the input position. */
1516 int (*obj_attrs_order
) (int);
1518 /* Handle merging unknown attributes; either warn and return TRUE,
1519 or give an error and return FALSE. */
1520 bfd_boolean (*obj_attrs_handle_unknown
) (bfd
*, int);
1522 /* Parse GNU properties. Return the property kind. If the property
1523 is corrupt, issue an error message and return property_corrupt. */
1524 enum elf_property_kind (*parse_gnu_properties
) (bfd
*, unsigned int,
1528 /* Merge GNU properties. Return TRUE if property is updated. */
1529 bfd_boolean (*merge_gnu_properties
) (struct bfd_link_info
*, bfd
*, bfd
*,
1530 elf_property
*, elf_property
*);
1532 /* Set up GNU properties. */
1533 bfd
*(*setup_gnu_properties
) (struct bfd_link_info
*);
1535 /* Fix up GNU properties. */
1536 void (*fixup_gnu_properties
) (struct bfd_link_info
*,
1537 elf_property_list
**);
1539 /* Encoding used for compact EH tables. */
1540 int (*compact_eh_encoding
) (struct bfd_link_info
*);
1542 /* Opcode representing no unwind. */
1543 int (*cant_unwind_opcode
) (struct bfd_link_info
*);
1545 /* Called when emitting an ELF symbol whoes input version had an
1546 ST_SHNDX field set to a value in the range SHN_LOPROC..SHN_HIOS.
1547 Returns the value to be installed in the ST_SHNDX field of the
1548 emitted symbol. If not defined, the value is left unchanged. */
1549 unsigned int (*symbol_section_index
) (bfd
*, elf_symbol_type
*);
1551 /* Called when a section has extra reloc sections. */
1552 bfd_boolean (*init_secondary_reloc_section
) (bfd
*, Elf_Internal_Shdr
*,
1553 const char *, unsigned int);
1555 /* Called when after loading the normal relocs for a section. */
1556 bfd_boolean (*slurp_secondary_relocs
) (bfd
*, asection
*, asymbol
**);
1558 /* Called after writing the normal relocs for a section. */
1559 bfd_boolean (*write_secondary_relocs
) (bfd
*, asection
*);
1561 /* This is non-zero if static TLS segments require a special alignment. */
1562 unsigned static_tls_alignment
;
1564 /* Alignment for the PT_GNU_STACK segment. */
1565 unsigned stack_align
;
1567 /* Flag bits to assign to a section of type SHT_STRTAB. */
1568 unsigned long elf_strtab_flags
;
1570 /* This is TRUE if the linker should act like collect and gather
1571 global constructors and destructors by name. This is TRUE for
1572 MIPS ELF because the Irix 5 tools can not handle the .init
1574 unsigned collect
: 1;
1576 /* This is TRUE if the linker should ignore changes to the type of a
1577 symbol. This is TRUE for MIPS ELF because some Irix 5 objects
1578 record undefined functions as STT_OBJECT although the definitions
1580 unsigned type_change_ok
: 1;
1582 /* Whether the backend may use REL relocations. (Some backends use
1583 both REL and RELA relocations, and this flag is set for those
1585 unsigned may_use_rel_p
: 1;
1587 /* Whether the backend may use RELA relocations. (Some backends use
1588 both REL and RELA relocations, and this flag is set for those
1590 unsigned may_use_rela_p
: 1;
1592 /* Whether the default relocation type is RELA. If a backend with
1593 this flag set wants REL relocations for a particular section,
1594 it must note that explicitly. Similarly, if this flag is clear,
1595 and the backend wants RELA relocations for a particular
1597 unsigned default_use_rela_p
: 1;
1599 /* True if PLT and copy relocations should be RELA by default. */
1600 unsigned rela_plts_and_copies_p
: 1;
1602 /* Set if RELA relocations for a relocatable link can be handled by
1603 generic code. Backends that set this flag need do nothing in the
1604 backend relocate_section routine for relocatable linking. */
1605 unsigned rela_normal
: 1;
1607 /* Set if DT_REL/DT_RELA/DT_RELSZ/DT_RELASZ should not include PLT
1609 unsigned dtrel_excludes_plt
: 1;
1611 /* TRUE if addresses "naturally" sign extend. This is used when
1612 swapping in from Elf32 when BFD64. */
1613 unsigned sign_extend_vma
: 1;
1615 unsigned want_got_plt
: 1;
1616 unsigned plt_readonly
: 1;
1617 unsigned want_plt_sym
: 1;
1618 unsigned plt_not_loaded
: 1;
1619 unsigned plt_alignment
: 4;
1620 unsigned can_gc_sections
: 1;
1621 unsigned can_refcount
: 1;
1622 unsigned want_got_sym
: 1;
1623 unsigned want_dynbss
: 1;
1624 unsigned want_dynrelro
: 1;
1626 /* Targets which do not support physical addressing often require
1627 that the p_paddr field in the section header to be set to zero.
1628 This field indicates whether this behavior is required. */
1629 unsigned want_p_paddr_set_to_zero
: 1;
1631 /* Target has broken hardware and/or kernel that requires pages not
1632 to be mapped twice with different permissions. */
1633 unsigned no_page_alias
: 1;
1635 /* True if an object file lacking a .note.GNU-stack section
1636 should be assumed to be requesting exec stack. At least one
1637 other file in the link needs to have a .note.GNU-stack section
1638 for a PT_GNU_STACK segment to be created. */
1639 unsigned default_execstack
: 1;
1641 /* True if elf_section_data(sec)->this_hdr.contents is sec->rawsize
1642 in length rather than sec->size in length, if sec->rawsize is
1643 non-zero and smaller than sec->size. */
1644 unsigned caches_rawsize
: 1;
1646 /* Address of protected data defined in the shared library may be
1647 external, i.e., due to copy relocation. */
1648 unsigned extern_protected_data
: 1;
1650 /* True if `_bfd_elf_link_renumber_dynsyms' must be called even for
1652 unsigned always_renumber_dynsyms
: 1;
1654 /* True if the 32-bit Linux PRPSINFO structure's `pr_uid' and `pr_gid'
1655 members use a 16-bit data type. */
1656 unsigned linux_prpsinfo32_ugid16
: 1;
1658 /* True if the 64-bit Linux PRPSINFO structure's `pr_uid' and `pr_gid'
1659 members use a 16-bit data type. */
1660 unsigned linux_prpsinfo64_ugid16
: 1;
1663 /* Information about reloc sections associated with a bfd_elf_section_data
1665 struct bfd_elf_section_reloc_data
1667 /* The ELF header for the reloc section associated with this
1669 Elf_Internal_Shdr
*hdr
;
1670 /* The number of relocations currently assigned to HDR. */
1672 /* The ELF section number of the reloc section. Only used for an
1675 /* Used by the backend linker to store the symbol hash table entries
1676 associated with relocs against global symbols. */
1677 struct elf_link_hash_entry
**hashes
;
1680 /* Information stored for each BFD section in an ELF file. This
1681 structure is allocated by elf_new_section_hook. */
1683 struct bfd_elf_section_data
1685 /* The ELF header for this section. */
1686 Elf_Internal_Shdr this_hdr
;
1688 /* INPUT_SECTION_FLAGS if specified in the linker script. */
1689 struct flag_info
*section_flag_info
;
1691 /* Information about the REL and RELA reloc sections associated
1692 with this section, if any. */
1693 struct bfd_elf_section_reloc_data rel
, rela
;
1695 /* The ELF section number of this section. */
1698 /* Used by the backend linker when generating a shared library to
1699 record the dynamic symbol index for a section symbol
1700 corresponding to this section. A value of 0 means that there is
1701 no dynamic symbol for this section. */
1704 /* A pointer to the linked-to section for SHF_LINK_ORDER. */
1705 asection
*linked_to
;
1707 /* A pointer to the swapped relocs. If the section uses REL relocs,
1708 rather than RELA, all the r_addend fields will be zero. This
1709 pointer may be NULL. It is used by the backend linker. */
1710 Elf_Internal_Rela
*relocs
;
1712 /* A pointer to a linked list tracking dynamic relocs copied for
1716 /* A pointer to the bfd section used for dynamic relocs. */
1720 /* Group name, if this section is a member of a group. */
1723 /* Group signature sym, if this is the SHT_GROUP section. */
1724 struct bfd_symbol
*id
;
1727 /* For a member of a group, points to the SHT_GROUP section.
1728 NULL for the SHT_GROUP section itself and non-group sections. */
1729 asection
*sec_group
;
1731 /* A linked list of member sections in the group. Circular when used by
1732 the linker. For the SHT_GROUP section, points at first member. */
1733 asection
*next_in_group
;
1735 /* The FDEs associated with this section. The u.fde.next_in_section
1736 field acts as a chain pointer. */
1737 struct eh_cie_fde
*fde_list
;
1739 /* Link from a text section to its .eh_frame_entry section. */
1740 asection
*eh_frame_entry
;
1742 /* A pointer used for various section optimizations. */
1746 #define elf_section_data(sec) ((struct bfd_elf_section_data*)(sec)->used_by_bfd)
1747 #define elf_linked_to_section(sec) (elf_section_data(sec)->linked_to)
1748 #define elf_section_type(sec) (elf_section_data(sec)->this_hdr.sh_type)
1749 #define elf_section_flags(sec) (elf_section_data(sec)->this_hdr.sh_flags)
1750 #define elf_section_info(sec) (elf_section_data(sec)->this_hdr.sh_info)
1751 #define elf_group_name(sec) (elf_section_data(sec)->group.name)
1752 #define elf_group_id(sec) (elf_section_data(sec)->group.id)
1753 #define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group)
1754 #define elf_fde_list(sec) (elf_section_data(sec)->fde_list)
1755 #define elf_sec_group(sec) (elf_section_data(sec)->sec_group)
1756 #define elf_section_eh_frame_entry(sec) (elf_section_data(sec)->eh_frame_entry)
1758 #define xvec_get_elf_backend_data(xvec) \
1759 ((const struct elf_backend_data *) (xvec)->backend_data)
1761 #define get_elf_backend_data(abfd) \
1762 xvec_get_elf_backend_data ((abfd)->xvec)
1764 /* The least object attributes (within an attributes subsection) known
1765 for any target. Some code assumes that the value 0 is not used and
1766 the field for that attribute can instead be used as a marker to
1767 indicate that attributes have been initialized. */
1768 #define LEAST_KNOWN_OBJ_ATTRIBUTE 2
1770 /* The maximum number of known object attributes for any target. */
1771 #define NUM_KNOWN_OBJ_ATTRIBUTES 71
1773 /* The value of an object attribute. The type indicates whether the attribute
1774 holds and integer, a string, or both. It can also indicate that there can
1775 be no default (i.e. all values must be written to file, even zero), or
1776 that the value is in error and should not be written to file. */
1778 typedef struct obj_attribute
1780 #define ATTR_TYPE_FLAG_INT_VAL (1 << 0)
1781 #define ATTR_TYPE_FLAG_STR_VAL (1 << 1)
1782 #define ATTR_TYPE_FLAG_NO_DEFAULT (1 << 2)
1783 #define ATTR_TYPE_FLAG_ERROR (1 << 3)
1785 #define ATTR_TYPE_HAS_INT_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_INT_VAL)
1786 #define ATTR_TYPE_HAS_STR_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_STR_VAL)
1787 #define ATTR_TYPE_HAS_NO_DEFAULT(TYPE) ((TYPE) & ATTR_TYPE_FLAG_NO_DEFAULT)
1788 #define ATTR_TYPE_HAS_ERROR(TYPE) ((TYPE) & ATTR_TYPE_FLAG_ERROR)
1795 typedef struct obj_attribute_list
1797 struct obj_attribute_list
*next
;
1800 } obj_attribute_list
;
1802 /* Object attributes may either be defined by the processor ABI, index
1803 OBJ_ATTR_PROC in the *_obj_attributes arrays, or be GNU-specific
1804 (and possibly also processor-specific), index OBJ_ATTR_GNU. */
1805 #define OBJ_ATTR_PROC 0
1806 #define OBJ_ATTR_GNU 1
1807 #define OBJ_ATTR_FIRST OBJ_ATTR_PROC
1808 #define OBJ_ATTR_LAST OBJ_ATTR_GNU
1810 /* The following object attribute tags are taken as generic, for all
1811 targets and for "gnu" where there is no target standard. */
1818 Tag_compatibility
= 32
1821 /* The following struct stores information about every SystemTap section
1822 found in the object file. */
1825 struct sdt_note
*next
;
1830 /* tdata information grabbed from an elf core file. */
1831 struct core_elf_obj_tdata
1840 /* Extra tdata information held for output ELF BFDs. */
1841 struct output_elf_obj_tdata
1843 struct elf_segment_map
*seg_map
;
1844 struct elf_strtab_hash
*strtab_ptr
;
1846 /* STT_SECTION symbols for each section */
1847 asymbol
**section_syms
;
1849 /* Used to determine if PT_GNU_EH_FRAME segment header should be
1851 asection
*eh_frame_hdr
;
1853 /* NT_GNU_BUILD_ID note type info. */
1856 bfd_boolean (*after_write_object_contents
) (bfd
*);
1861 /* Records the result of `get_program_header_size'. */
1862 bfd_size_type program_header_size
;
1864 /* Used when laying out sections. */
1865 file_ptr next_file_pos
;
1867 int num_section_syms
;
1868 unsigned int shstrtab_section
, strtab_section
;
1870 /* Segment flags for the PT_GNU_STACK segment. */
1871 unsigned int stack_flags
;
1873 /* Used to determine if the e_flags field has been initialized */
1874 bfd_boolean flags_init
;
1877 /* Indicate if the bfd contains SHF_GNU_MBIND sections or symbols that
1878 have the STT_GNU_IFUNC symbol type or STB_GNU_UNIQUE binding. Used
1879 to set the osabi field in the ELF header structure. */
1882 elf_gnu_osabi_mbind
= 1 << 0,
1883 elf_gnu_osabi_ifunc
= 1 << 1,
1884 elf_gnu_osabi_unique
= 1 << 2,
1887 typedef struct elf_section_list
1889 Elf_Internal_Shdr hdr
;
1891 struct elf_section_list
* next
;
1894 enum dynamic_lib_link_class
{
1898 DYN_NO_ADD_NEEDED
= 4,
1902 /* Some private data is stashed away for future use using the tdata pointer
1903 in the bfd structure. */
1905 struct elf_obj_tdata
1907 Elf_Internal_Ehdr elf_header
[1]; /* Actual data, but ref like ptr */
1908 Elf_Internal_Shdr
**elf_sect_ptr
;
1909 Elf_Internal_Phdr
*phdr
;
1910 Elf_Internal_Shdr symtab_hdr
;
1911 Elf_Internal_Shdr shstrtab_hdr
;
1912 Elf_Internal_Shdr strtab_hdr
;
1913 Elf_Internal_Shdr dynsymtab_hdr
;
1914 Elf_Internal_Shdr dynstrtab_hdr
;
1915 Elf_Internal_Shdr dynversym_hdr
;
1916 Elf_Internal_Shdr dynverref_hdr
;
1917 Elf_Internal_Shdr dynverdef_hdr
;
1918 elf_section_list
* symtab_shndx_list
;
1919 bfd_vma gp
; /* The gp value */
1920 unsigned int gp_size
; /* The gp size */
1921 unsigned int num_elf_sections
; /* elf_sect_ptr size */
1923 /* A mapping from external symbols to entries in the linker hash
1924 table, used when linking. This is indexed by the symbol index
1925 minus the sh_info field of the symbol table header. */
1926 struct elf_link_hash_entry
**sym_hashes
;
1928 /* Track usage and final offsets of GOT entries for local symbols.
1929 This array is indexed by symbol index. Elements are used
1930 identically to "got" in struct elf_link_hash_entry. */
1933 bfd_signed_vma
*refcounts
;
1935 struct got_entry
**ents
;
1938 /* The linker ELF emulation code needs to let the backend ELF linker
1939 know what filename should be used for a dynamic object if the
1940 dynamic object is found using a search. The emulation code then
1941 sometimes needs to know what name was actually used. Until the
1942 file has been added to the linker symbol table, this field holds
1943 the name the linker wants. After it has been added, it holds the
1944 name actually used, which will be the DT_SONAME entry if there is
1946 const char *dt_name
;
1948 /* The linker emulation needs to know what audit libs
1949 are used by a dynamic object. */
1950 const char *dt_audit
;
1952 /* Used by find_nearest_line entry point. */
1955 /* A place to stash dwarf1 info for this bfd. */
1956 struct dwarf1_debug
*dwarf1_find_line_info
;
1958 /* A place to stash dwarf2 info for this bfd. */
1959 void *dwarf2_find_line_info
;
1961 /* Stash away info for yet another find line/function variant. */
1962 void *elf_find_function_cache
;
1964 /* Number of symbol version definitions we are about to emit. */
1965 unsigned int cverdefs
;
1967 /* Number of symbol version references we are about to emit. */
1968 unsigned int cverrefs
;
1970 /* Symbol version definitions in external objects. */
1971 Elf_Internal_Verdef
*verdef
;
1973 /* Symbol version references to external objects. */
1974 Elf_Internal_Verneed
*verref
;
1976 /* A pointer to the .eh_frame section. */
1977 asection
*eh_frame_section
;
1979 /* Symbol buffer. */
1982 /* List of GNU properties. Will be updated by setup_gnu_properties
1983 after all input GNU properties are merged for output. */
1984 elf_property_list
*properties
;
1986 obj_attribute known_obj_attributes
[2][NUM_KNOWN_OBJ_ATTRIBUTES
];
1987 obj_attribute_list
*other_obj_attributes
[2];
1989 /* Linked-list containing information about every Systemtap section
1990 found in the object file. Each section corresponds to one entry
1992 struct sdt_note
*sdt_note_head
;
1994 Elf_Internal_Shdr
**group_sect_ptr
;
1995 unsigned int num_group
;
1997 /* Index into group_sect_ptr, updated by setup_group when finding a
1998 section's group. Used to optimize subsequent group searches. */
1999 unsigned int group_search_offset
;
2001 unsigned int symtab_section
, dynsymtab_section
;
2002 unsigned int dynversym_section
, dynverdef_section
, dynverref_section
;
2004 /* An identifier used to distinguish different target
2005 specific extensions to this structure. */
2006 ENUM_BITFIELD (elf_target_id
) object_id
: 6;
2008 /* Whether a dyanmic object was specified normally on the linker
2009 command line, or was specified when --as-needed was in effect,
2010 or was found via a DT_NEEDED entry. */
2011 ENUM_BITFIELD (dynamic_lib_link_class
) dyn_lib_class
: 4;
2013 /* Whether the bfd uses OS specific bits that require ELFOSABI_GNU. */
2014 ENUM_BITFIELD (elf_gnu_osabi
) has_gnu_osabi
: 3;
2016 /* Whether if the bfd contains the GNU_PROPERTY_NO_COPY_ON_PROTECTED
2018 unsigned int has_no_copy_on_protected
: 1;
2020 /* Irix 5 often screws up the symbol table, sorting local symbols
2021 after global symbols. This flag is set if the symbol table in
2022 this BFD appears to be screwed up. If it is, we ignore the
2023 sh_info field in the symbol table header, and always read all the
2025 unsigned int bad_symtab
: 1;
2027 /* Information grabbed from an elf core file. */
2028 struct core_elf_obj_tdata
*core
;
2030 /* More information held for output ELF BFDs. */
2031 struct output_elf_obj_tdata
*o
;
2034 #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
2036 #define elf_object_id(bfd) (elf_tdata(bfd) -> object_id)
2037 #define elf_program_header_size(bfd) (elf_tdata(bfd) -> o->program_header_size)
2038 #define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header)
2039 #define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr)
2040 #define elf_numsections(bfd) (elf_tdata(bfd) -> num_elf_sections)
2041 #define elf_seg_map(bfd) (elf_tdata(bfd) -> o->seg_map)
2042 #define elf_next_file_pos(bfd) (elf_tdata(bfd) -> o->next_file_pos)
2043 #define elf_eh_frame_hdr(bfd) (elf_tdata(bfd) -> o->eh_frame_hdr)
2044 #define elf_stack_flags(bfd) (elf_tdata(bfd) -> o->stack_flags)
2045 #define elf_shstrtab(bfd) (elf_tdata(bfd) -> o->strtab_ptr)
2046 #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section)
2047 #define elf_symtab_shndx_list(bfd) (elf_tdata(bfd) -> symtab_shndx_list)
2048 #define elf_strtab_sec(bfd) (elf_tdata(bfd) -> o->strtab_section)
2049 #define elf_shstrtab_sec(bfd) (elf_tdata(bfd) -> o->shstrtab_section)
2050 #define elf_symtab_hdr(bfd) (elf_tdata(bfd) -> symtab_hdr)
2051 #define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section)
2052 #define elf_dynversym(bfd) (elf_tdata(bfd) -> dynversym_section)
2053 #define elf_dynverdef(bfd) (elf_tdata(bfd) -> dynverdef_section)
2054 #define elf_dynverref(bfd) (elf_tdata(bfd) -> dynverref_section)
2055 #define elf_eh_frame_section(bfd) \
2056 (elf_tdata(bfd) -> eh_frame_section)
2057 #define elf_section_syms(bfd) (elf_tdata(bfd) -> o->section_syms)
2058 #define elf_num_section_syms(bfd) (elf_tdata(bfd) -> o->num_section_syms)
2059 #define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
2060 #define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
2061 #define elf_gp(bfd) (elf_tdata(bfd) -> gp)
2062 #define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size)
2063 #define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes)
2064 #define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts)
2065 #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets)
2066 #define elf_local_got_ents(bfd) (elf_tdata(bfd) -> local_got.ents)
2067 #define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name)
2068 #define elf_dt_audit(bfd) (elf_tdata(bfd) -> dt_audit)
2069 #define elf_dyn_lib_class(bfd) (elf_tdata(bfd) -> dyn_lib_class)
2070 #define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab)
2071 #define elf_flags_init(bfd) (elf_tdata(bfd) -> o->flags_init)
2072 #define elf_known_obj_attributes(bfd) (elf_tdata (bfd) -> known_obj_attributes)
2073 #define elf_other_obj_attributes(bfd) (elf_tdata (bfd) -> other_obj_attributes)
2074 #define elf_known_obj_attributes_proc(bfd) \
2075 (elf_known_obj_attributes (bfd) [OBJ_ATTR_PROC])
2076 #define elf_other_obj_attributes_proc(bfd) \
2077 (elf_other_obj_attributes (bfd) [OBJ_ATTR_PROC])
2078 #define elf_properties(bfd) (elf_tdata (bfd) -> properties)
2079 #define elf_has_no_copy_on_protected(bfd) \
2080 (elf_tdata(bfd) -> has_no_copy_on_protected)
2082 extern void _bfd_elf_swap_verdef_in
2083 (bfd
*, const Elf_External_Verdef
*, Elf_Internal_Verdef
*);
2084 extern void _bfd_elf_swap_verdef_out
2085 (bfd
*, const Elf_Internal_Verdef
*, Elf_External_Verdef
*);
2086 extern void _bfd_elf_swap_verdaux_in
2087 (bfd
*, const Elf_External_Verdaux
*, Elf_Internal_Verdaux
*);
2088 extern void _bfd_elf_swap_verdaux_out
2089 (bfd
*, const Elf_Internal_Verdaux
*, Elf_External_Verdaux
*);
2090 extern void _bfd_elf_swap_verneed_in
2091 (bfd
*, const Elf_External_Verneed
*, Elf_Internal_Verneed
*);
2092 extern void _bfd_elf_swap_verneed_out
2093 (bfd
*, const Elf_Internal_Verneed
*, Elf_External_Verneed
*);
2094 extern void _bfd_elf_swap_vernaux_in
2095 (bfd
*, const Elf_External_Vernaux
*, Elf_Internal_Vernaux
*);
2096 extern void _bfd_elf_swap_vernaux_out
2097 (bfd
*, const Elf_Internal_Vernaux
*, Elf_External_Vernaux
*);
2098 extern void _bfd_elf_swap_versym_in
2099 (bfd
*, const Elf_External_Versym
*, Elf_Internal_Versym
*);
2100 extern void _bfd_elf_swap_versym_out
2101 (bfd
*, const Elf_Internal_Versym
*, Elf_External_Versym
*);
2103 extern unsigned int _bfd_elf_section_from_bfd_section
2104 (bfd
*, asection
*);
2105 extern char *bfd_elf_string_from_elf_section
2106 (bfd
*, unsigned, unsigned);
2107 extern Elf_Internal_Sym
*bfd_elf_get_elf_syms
2108 (bfd
*, Elf_Internal_Shdr
*, size_t, size_t, Elf_Internal_Sym
*, void *,
2109 Elf_External_Sym_Shndx
*);
2110 extern char * bfd_elf_get_str_section (bfd
*, unsigned int);
2111 extern const char *bfd_elf_sym_name
2112 (bfd
*, Elf_Internal_Shdr
*, Elf_Internal_Sym
*, asection
*);
2114 extern bfd_boolean _bfd_elf_copy_private_bfd_data
2116 extern bfd_boolean _bfd_elf_print_private_bfd_data
2118 const char * _bfd_elf_get_symbol_version_string
2119 (bfd
*, asymbol
*, bfd_boolean
, bfd_boolean
*);
2120 extern void bfd_elf_print_symbol
2121 (bfd
*, void *, asymbol
*, bfd_print_symbol_type
);
2123 extern unsigned int _bfd_elf_eh_frame_address_size
2124 (bfd
*, const asection
*);
2125 extern bfd_byte _bfd_elf_encode_eh_address
2126 (bfd
*abfd
, struct bfd_link_info
*info
, asection
*osec
, bfd_vma offset
,
2127 asection
*loc_sec
, bfd_vma loc_offset
, bfd_vma
*encoded
);
2128 extern bfd_boolean _bfd_elf_can_make_relative
2129 (bfd
*input_bfd
, struct bfd_link_info
*info
, asection
*eh_frame_section
);
2131 extern enum elf_reloc_type_class _bfd_elf_reloc_type_class
2132 (const struct bfd_link_info
*, const asection
*,
2133 const Elf_Internal_Rela
*);
2134 extern bfd_vma _bfd_elf_rela_local_sym
2135 (bfd
*, Elf_Internal_Sym
*, asection
**, Elf_Internal_Rela
*);
2136 extern bfd_vma _bfd_elf_rel_local_sym
2137 (bfd
*, Elf_Internal_Sym
*, asection
**, bfd_vma
);
2138 extern bfd_vma _bfd_elf_section_offset
2139 (bfd
*, struct bfd_link_info
*, asection
*, bfd_vma
);
2141 extern unsigned long bfd_elf_hash
2143 extern unsigned long bfd_elf_gnu_hash
2146 extern bfd_reloc_status_type bfd_elf_generic_reloc
2147 (bfd
*, arelent
*, asymbol
*, void *, asection
*, bfd
*, char **);
2148 extern bfd_boolean bfd_elf_allocate_object
2149 (bfd
*, size_t, enum elf_target_id
);
2150 extern bfd_boolean bfd_elf_make_object
2152 extern bfd_boolean bfd_elf_mkcorefile
2154 extern bfd_boolean _bfd_elf_make_section_from_shdr
2155 (bfd
*, Elf_Internal_Shdr
*, const char *, int);
2156 extern bfd_boolean _bfd_elf_make_section_from_phdr
2157 (bfd
*, Elf_Internal_Phdr
*, int, const char *);
2158 extern struct bfd_hash_entry
*_bfd_elf_link_hash_newfunc
2159 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *);
2160 extern struct bfd_link_hash_table
*_bfd_elf_link_hash_table_create
2162 extern void _bfd_elf_link_hash_table_free
2164 extern void _bfd_elf_link_hash_copy_indirect
2165 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
2166 struct elf_link_hash_entry
*);
2167 extern void _bfd_elf_link_hash_hide_symbol
2168 (struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd_boolean
);
2169 extern void _bfd_elf_link_hide_symbol
2170 (bfd
*, struct bfd_link_info
*, struct bfd_link_hash_entry
*);
2171 extern bfd_boolean _bfd_elf_link_hash_fixup_symbol
2172 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
2173 extern bfd_boolean _bfd_elf_link_hash_table_init
2174 (struct elf_link_hash_table
*, bfd
*,
2175 struct bfd_hash_entry
*(*)
2176 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *),
2177 unsigned int, enum elf_target_id
);
2178 extern bfd_boolean _bfd_elf_slurp_version_tables
2179 (bfd
*, bfd_boolean
);
2180 extern bfd_boolean _bfd_elf_merge_sections
2181 (bfd
*, struct bfd_link_info
*);
2182 extern bfd_boolean _bfd_elf_match_sections_by_type
2183 (bfd
*, const asection
*, bfd
*, const asection
*);
2184 extern bfd_boolean bfd_elf_is_group_section
2185 (bfd
*, const struct bfd_section
*);
2186 extern const char *bfd_elf_group_name
2187 (bfd
*, const struct bfd_section
*);
2188 extern bfd_boolean _bfd_elf_section_already_linked
2189 (bfd
*, asection
*, struct bfd_link_info
*);
2190 extern void bfd_elf_set_group_contents
2191 (bfd
*, asection
*, void *);
2192 extern unsigned int _bfd_elf_filter_global_symbols
2193 (bfd
*, struct bfd_link_info
*, asymbol
**, long);
2194 extern asection
*_bfd_elf_check_kept_section
2195 (asection
*, struct bfd_link_info
*);
2196 #define _bfd_elf_link_just_syms _bfd_generic_link_just_syms
2197 extern void _bfd_elf_copy_link_hash_symbol_type
2198 (bfd
*, struct bfd_link_hash_entry
*, struct bfd_link_hash_entry
*);
2199 extern bfd_boolean _bfd_elf_size_group_sections
2200 (struct bfd_link_info
*);
2201 extern bfd_boolean _bfd_elf_fixup_group_sections
2202 (bfd
*, asection
*);
2203 extern bfd_boolean _bfd_elf_copy_private_header_data
2205 extern bfd_boolean _bfd_elf_copy_private_symbol_data
2206 (bfd
*, asymbol
*, bfd
*, asymbol
*);
2207 #define _bfd_generic_init_private_section_data \
2208 _bfd_elf_init_private_section_data
2209 extern bfd_boolean _bfd_elf_init_private_section_data
2210 (bfd
*, asection
*, bfd
*, asection
*, struct bfd_link_info
*);
2211 extern bfd_boolean _bfd_elf_copy_private_section_data
2212 (bfd
*, asection
*, bfd
*, asection
*);
2213 extern bfd_boolean _bfd_elf_write_object_contents
2215 extern bfd_boolean _bfd_elf_write_corefile_contents
2217 extern bfd_boolean _bfd_elf_set_section_contents
2218 (bfd
*, sec_ptr
, const void *, file_ptr
, bfd_size_type
);
2219 extern long _bfd_elf_get_symtab_upper_bound
2221 extern long _bfd_elf_canonicalize_symtab
2222 (bfd
*, asymbol
**);
2223 extern long _bfd_elf_get_dynamic_symtab_upper_bound
2225 extern long _bfd_elf_canonicalize_dynamic_symtab
2226 (bfd
*, asymbol
**);
2227 extern long _bfd_elf_get_synthetic_symtab
2228 (bfd
*, long, asymbol
**, long, asymbol
**, asymbol
**);
2229 extern long _bfd_elf_get_reloc_upper_bound
2231 extern long _bfd_elf_canonicalize_reloc
2232 (bfd
*, sec_ptr
, arelent
**, asymbol
**);
2233 extern asection
* _bfd_elf_get_dynamic_reloc_section
2234 (bfd
*, asection
*, bfd_boolean
);
2235 extern asection
* _bfd_elf_make_dynamic_reloc_section
2236 (asection
*, bfd
*, unsigned int, bfd
*, bfd_boolean
);
2237 extern long _bfd_elf_get_dynamic_reloc_upper_bound
2239 extern long _bfd_elf_canonicalize_dynamic_reloc
2240 (bfd
*, arelent
**, asymbol
**);
2241 extern asymbol
*_bfd_elf_make_empty_symbol
2243 extern void _bfd_elf_get_symbol_info
2244 (bfd
*, asymbol
*, symbol_info
*);
2245 extern bfd_boolean _bfd_elf_is_local_label_name
2246 (bfd
*, const char *);
2247 extern alent
*_bfd_elf_get_lineno
2249 extern bfd_boolean _bfd_elf_set_arch_mach
2250 (bfd
*, enum bfd_architecture
, unsigned long);
2251 extern bfd_boolean _bfd_elf_find_nearest_line
2252 (bfd
*, asymbol
**, asection
*, bfd_vma
,
2253 const char **, const char **, unsigned int *, unsigned int *);
2254 extern bfd_boolean _bfd_elf_find_line
2255 (bfd
*, asymbol
**, asymbol
*, const char **, unsigned int *);
2256 extern bfd_boolean _bfd_elf_find_inliner_info
2257 (bfd
*, const char **, const char **, unsigned int *);
2258 extern asymbol
*_bfd_elf_find_function
2259 (bfd
*, asymbol
**, asection
*, bfd_vma
, const char **, const char **);
2260 #define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols
2261 #define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
2262 extern int _bfd_elf_sizeof_headers
2263 (bfd
*, struct bfd_link_info
*);
2264 extern bfd_boolean _bfd_elf_new_section_hook
2265 (bfd
*, asection
*);
2266 extern const struct bfd_elf_special_section
*_bfd_elf_get_special_section
2267 (const char *, const struct bfd_elf_special_section
*, unsigned int);
2268 extern const struct bfd_elf_special_section
*_bfd_elf_get_sec_type_attr
2269 (bfd
*, asection
*);
2271 extern bfd_boolean _bfd_elf_link_hide_sym_by_version
2272 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
2274 /* If the target doesn't have reloc handling written yet: */
2275 extern bfd_boolean _bfd_elf_no_info_to_howto
2276 (bfd
*, arelent
*, Elf_Internal_Rela
*);
2278 extern bfd_boolean bfd_section_from_shdr
2279 (bfd
*, unsigned int shindex
);
2280 extern bfd_boolean bfd_section_from_phdr
2281 (bfd
*, Elf_Internal_Phdr
*, int);
2283 extern int _bfd_elf_symbol_from_bfd_symbol
2284 (bfd
*, asymbol
**);
2286 extern Elf_Internal_Sym
*bfd_sym_from_r_symndx
2287 (struct sym_cache
*, bfd
*, unsigned long);
2288 extern asection
*bfd_section_from_elf_index
2289 (bfd
*, unsigned int);
2291 extern struct elf_strtab_hash
* _bfd_elf_strtab_init
2293 extern void _bfd_elf_strtab_free
2294 (struct elf_strtab_hash
*);
2295 extern size_t _bfd_elf_strtab_add
2296 (struct elf_strtab_hash
*, const char *, bfd_boolean
);
2297 extern void _bfd_elf_strtab_addref
2298 (struct elf_strtab_hash
*, size_t);
2299 extern void _bfd_elf_strtab_delref
2300 (struct elf_strtab_hash
*, size_t);
2301 extern unsigned int _bfd_elf_strtab_refcount
2302 (struct elf_strtab_hash
*, size_t);
2303 extern void _bfd_elf_strtab_clear_all_refs
2304 (struct elf_strtab_hash
*);
2305 extern void *_bfd_elf_strtab_save
2306 (struct elf_strtab_hash
*);
2307 extern void _bfd_elf_strtab_restore
2308 (struct elf_strtab_hash
*, void *);
2309 extern bfd_size_type _bfd_elf_strtab_size
2310 (struct elf_strtab_hash
*);
2311 extern bfd_size_type _bfd_elf_strtab_len
2312 (struct elf_strtab_hash
*);
2313 extern bfd_size_type _bfd_elf_strtab_offset
2314 (struct elf_strtab_hash
*, size_t);
2315 extern const char * _bfd_elf_strtab_str
2316 (struct elf_strtab_hash
*, size_t idx
, bfd_size_type
*offset
);
2317 extern bfd_boolean _bfd_elf_strtab_emit
2318 (bfd
*, struct elf_strtab_hash
*);
2319 extern void _bfd_elf_strtab_finalize
2320 (struct elf_strtab_hash
*);
2322 extern bfd_boolean bfd_elf_parse_eh_frame_entries
2323 (bfd
*, struct bfd_link_info
*);
2324 extern bfd_boolean _bfd_elf_parse_eh_frame_entry
2325 (struct bfd_link_info
*, asection
*, struct elf_reloc_cookie
*);
2326 extern void _bfd_elf_parse_eh_frame
2327 (bfd
*, struct bfd_link_info
*, asection
*, struct elf_reloc_cookie
*);
2328 extern bfd_boolean _bfd_elf_end_eh_frame_parsing
2329 (struct bfd_link_info
*info
);
2331 extern bfd_boolean _bfd_elf_discard_section_eh_frame
2332 (bfd
*, struct bfd_link_info
*, asection
*,
2333 bfd_boolean (*) (bfd_vma
, void *), struct elf_reloc_cookie
*);
2334 extern bfd_boolean _bfd_elf_adjust_eh_frame_global_symbol
2335 (struct elf_link_hash_entry
*, void *);
2336 extern bfd_boolean _bfd_elf_discard_section_eh_frame_hdr
2337 (bfd
*, struct bfd_link_info
*);
2338 extern bfd_vma _bfd_elf_eh_frame_section_offset
2339 (bfd
*, struct bfd_link_info
*, asection
*, bfd_vma
);
2340 extern bfd_boolean _bfd_elf_write_section_eh_frame
2341 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
2342 bfd_boolean _bfd_elf_write_section_eh_frame_entry
2343 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
2344 extern bfd_boolean
_bfd_elf_fixup_eh_frame_hdr (struct bfd_link_info
*);
2345 extern bfd_boolean _bfd_elf_write_section_eh_frame_hdr
2346 (bfd
*, struct bfd_link_info
*);
2347 extern bfd_boolean _bfd_elf_eh_frame_present
2348 (struct bfd_link_info
*);
2349 extern bfd_boolean _bfd_elf_eh_frame_entry_present
2350 (struct bfd_link_info
*);
2351 extern bfd_boolean _bfd_elf_maybe_strip_eh_frame_hdr
2352 (struct bfd_link_info
*);
2354 extern bfd_boolean
_bfd_elf_hash_symbol (struct elf_link_hash_entry
*);
2356 extern long _bfd_elf_link_lookup_local_dynindx
2357 (struct bfd_link_info
*, bfd
*, long);
2358 extern bfd_boolean _bfd_elf_compute_section_file_positions
2359 (bfd
*, struct bfd_link_info
*);
2360 extern file_ptr _bfd_elf_assign_file_position_for_section
2361 (Elf_Internal_Shdr
*, file_ptr
, bfd_boolean
);
2362 extern bfd_boolean _bfd_elf_modify_headers
2363 (bfd
*, struct bfd_link_info
*);
2365 extern bfd_boolean _bfd_elf_validate_reloc
2368 extern bfd_boolean bfd_elf_record_link_assignment
2369 (bfd
*, struct bfd_link_info
*, const char *, bfd_boolean
,
2371 extern bfd_boolean
bfd_elf_stack_segment_size (bfd
*, struct bfd_link_info
*,
2372 const char *, bfd_vma
);
2373 extern bfd_boolean bfd_elf_size_dynamic_sections
2374 (bfd
*, const char *, const char *, const char *, const char *, const char *,
2375 const char * const *, struct bfd_link_info
*, struct bfd_section
**);
2376 extern bfd_boolean bfd_elf_size_dynsym_hash_dynstr
2377 (bfd
*, struct bfd_link_info
*);
2378 extern bfd_boolean bfd_elf_get_bfd_needed_list
2379 (bfd
*, struct bfd_link_needed_list
**);
2380 extern struct bfd_link_needed_list
*bfd_elf_get_needed_list
2381 (bfd
*, struct bfd_link_info
*);
2382 extern void bfd_elf_set_dt_needed_name
2383 (bfd
*, const char *);
2384 extern const char *bfd_elf_get_dt_soname
2386 extern void bfd_elf_set_dyn_lib_class
2387 (bfd
*, enum dynamic_lib_link_class
);
2388 extern int bfd_elf_get_dyn_lib_class
2390 extern struct bfd_link_needed_list
*bfd_elf_get_runpath_list
2391 (bfd
*, struct bfd_link_info
*);
2392 extern int bfd_elf_discard_info
2393 (bfd
*, struct bfd_link_info
*);
2394 extern unsigned int _bfd_elf_default_action_discarded
2395 (struct bfd_section
*);
2396 extern struct bfd_section
*_bfd_elf_tls_setup
2397 (bfd
*, struct bfd_link_info
*);
2399 extern bfd_boolean _bfd_elf_link_create_dynamic_sections
2400 (bfd
*, struct bfd_link_info
*);
2401 extern bfd_boolean _bfd_elf_omit_section_dynsym_default
2402 (bfd
*, struct bfd_link_info
*, asection
*);
2403 extern bfd_boolean _bfd_elf_omit_section_dynsym_all
2404 (bfd
*, struct bfd_link_info
*, asection
*);
2405 extern bfd_boolean _bfd_elf_create_dynamic_sections
2406 (bfd
*, struct bfd_link_info
*);
2407 extern bfd_boolean _bfd_elf_create_got_section
2408 (bfd
*, struct bfd_link_info
*);
2409 extern asection
*_bfd_elf_section_for_symbol
2410 (struct elf_reloc_cookie
*, unsigned long, bfd_boolean
);
2411 extern struct elf_link_hash_entry
*_bfd_elf_define_linkage_sym
2412 (bfd
*, struct bfd_link_info
*, asection
*, const char *);
2413 extern void _bfd_elf_init_1_index_section
2414 (bfd
*, struct bfd_link_info
*);
2415 extern void _bfd_elf_init_2_index_sections
2416 (bfd
*, struct bfd_link_info
*);
2418 extern bfd_boolean _bfd_elfcore_make_pseudosection
2419 (bfd
*, char *, size_t, ufile_ptr
);
2420 extern char *_bfd_elfcore_strndup
2421 (bfd
*, char *, size_t);
2423 extern Elf_Internal_Rela
*_bfd_elf_link_read_relocs
2424 (bfd
*, asection
*, void *, Elf_Internal_Rela
*, bfd_boolean
);
2426 extern bfd_boolean _bfd_elf_link_output_relocs
2427 (bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*,
2428 struct elf_link_hash_entry
**);
2430 extern bfd_boolean _bfd_elf_adjust_dynamic_copy
2431 (struct bfd_link_info
*, struct elf_link_hash_entry
*, asection
*);
2433 extern bfd_boolean _bfd_elf_dynamic_symbol_p
2434 (struct elf_link_hash_entry
*, struct bfd_link_info
*, bfd_boolean
);
2436 extern bfd_boolean _bfd_elf_symbol_refs_local_p
2437 (struct elf_link_hash_entry
*, struct bfd_link_info
*, bfd_boolean
);
2439 extern bfd_reloc_status_type bfd_elf_perform_complex_relocation
2440 (bfd
*, asection
*, bfd_byte
*, Elf_Internal_Rela
*, bfd_vma
);
2442 extern bfd_boolean _bfd_elf_setup_sections
2445 extern struct bfd_link_hash_entry
*bfd_elf_define_start_stop
2446 (struct bfd_link_info
*, const char *, asection
*);
2448 extern bfd_boolean
_bfd_elf_init_file_header (bfd
*, struct bfd_link_info
*);
2450 extern bfd_boolean
_bfd_elf_final_write_processing (bfd
*);
2452 extern bfd_cleanup bfd_elf32_object_p
2454 extern bfd_cleanup bfd_elf32_core_file_p
2456 extern char *bfd_elf32_core_file_failing_command
2458 extern int bfd_elf32_core_file_failing_signal
2460 extern bfd_boolean bfd_elf32_core_file_matches_executable_p
2462 extern int bfd_elf32_core_file_pid
2464 extern bfd_boolean _bfd_elf32_core_find_build_id
2467 extern bfd_boolean bfd_elf32_swap_symbol_in
2468 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
2469 extern void bfd_elf32_swap_symbol_out
2470 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
2471 extern void bfd_elf32_swap_reloc_in
2472 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2473 extern void bfd_elf32_swap_reloc_out
2474 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2475 extern void bfd_elf32_swap_reloca_in
2476 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2477 extern void bfd_elf32_swap_reloca_out
2478 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2479 extern void bfd_elf32_swap_phdr_in
2480 (bfd
*, const Elf32_External_Phdr
*, Elf_Internal_Phdr
*);
2481 extern void bfd_elf32_swap_phdr_out
2482 (bfd
*, const Elf_Internal_Phdr
*, Elf32_External_Phdr
*);
2483 extern void bfd_elf32_swap_dyn_in
2484 (bfd
*, const void *, Elf_Internal_Dyn
*);
2485 extern void bfd_elf32_swap_dyn_out
2486 (bfd
*, const Elf_Internal_Dyn
*, void *);
2487 extern long bfd_elf32_slurp_symbol_table
2488 (bfd
*, asymbol
**, bfd_boolean
);
2489 extern bfd_boolean bfd_elf32_write_shdrs_and_ehdr
2491 extern int bfd_elf32_write_out_phdrs
2492 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
2493 extern bfd_boolean bfd_elf32_checksum_contents
2494 (bfd
* , void (*) (const void *, size_t, void *), void *);
2495 extern void bfd_elf32_write_relocs
2496 (bfd
*, asection
*, void *);
2497 extern bfd_boolean bfd_elf32_slurp_reloc_table
2498 (bfd
*, asection
*, asymbol
**, bfd_boolean
);
2500 extern bfd_cleanup bfd_elf64_object_p
2502 extern bfd_cleanup bfd_elf64_core_file_p
2504 extern char *bfd_elf64_core_file_failing_command
2506 extern int bfd_elf64_core_file_failing_signal
2508 extern bfd_boolean bfd_elf64_core_file_matches_executable_p
2510 extern int bfd_elf64_core_file_pid
2512 extern bfd_boolean _bfd_elf64_core_find_build_id
2515 extern bfd_boolean bfd_elf64_swap_symbol_in
2516 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
2517 extern void bfd_elf64_swap_symbol_out
2518 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
2519 extern void bfd_elf64_swap_reloc_in
2520 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2521 extern void bfd_elf64_swap_reloc_out
2522 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2523 extern void bfd_elf64_swap_reloca_in
2524 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2525 extern void bfd_elf64_swap_reloca_out
2526 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2527 extern void bfd_elf64_swap_phdr_in
2528 (bfd
*, const Elf64_External_Phdr
*, Elf_Internal_Phdr
*);
2529 extern void bfd_elf64_swap_phdr_out
2530 (bfd
*, const Elf_Internal_Phdr
*, Elf64_External_Phdr
*);
2531 extern void bfd_elf64_swap_dyn_in
2532 (bfd
*, const void *, Elf_Internal_Dyn
*);
2533 extern void bfd_elf64_swap_dyn_out
2534 (bfd
*, const Elf_Internal_Dyn
*, void *);
2535 extern long bfd_elf64_slurp_symbol_table
2536 (bfd
*, asymbol
**, bfd_boolean
);
2537 extern bfd_boolean bfd_elf64_write_shdrs_and_ehdr
2539 extern int bfd_elf64_write_out_phdrs
2540 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
2541 extern bfd_boolean bfd_elf64_checksum_contents
2542 (bfd
* , void (*) (const void *, size_t, void *), void *);
2543 extern void bfd_elf64_write_relocs
2544 (bfd
*, asection
*, void *);
2545 extern bfd_boolean bfd_elf64_slurp_reloc_table
2546 (bfd
*, asection
*, asymbol
**, bfd_boolean
);
2548 extern bfd_boolean _bfd_elf_default_relocs_compatible
2549 (const bfd_target
*, const bfd_target
*);
2551 extern bfd_boolean _bfd_elf_relocs_compatible
2552 (const bfd_target
*, const bfd_target
*);
2553 extern bfd_boolean _bfd_elf_notice_as_needed
2554 (bfd
*, struct bfd_link_info
*, enum notice_asneeded_action
);
2556 extern struct elf_link_hash_entry
*_bfd_elf_archive_symbol_lookup
2557 (bfd
*, struct bfd_link_info
*, const char *);
2558 extern bfd_boolean bfd_elf_link_add_symbols
2559 (bfd
*, struct bfd_link_info
*);
2560 extern bfd_boolean _bfd_elf_add_dynamic_entry
2561 (struct bfd_link_info
*, bfd_vma
, bfd_vma
);
2562 extern bfd_boolean _bfd_elf_strip_zero_sized_dynamic_sections
2563 (struct bfd_link_info
*);
2564 extern int bfd_elf_add_dt_needed_tag
2565 (bfd
*, struct bfd_link_info
*);
2566 extern bfd_boolean _bfd_elf_link_check_relocs
2567 (bfd
*, struct bfd_link_info
*);
2569 extern bfd_boolean bfd_elf_link_record_dynamic_symbol
2570 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
2572 extern int bfd_elf_link_record_local_dynamic_symbol
2573 (struct bfd_link_info
*, bfd
*, long);
2575 extern bfd_boolean _bfd_elf_close_and_cleanup
2578 extern bfd_boolean _bfd_elf_common_definition
2579 (Elf_Internal_Sym
*);
2581 extern unsigned int _bfd_elf_common_section_index
2584 extern asection
*_bfd_elf_common_section
2587 extern bfd_vma _bfd_elf_default_got_elt_size
2588 (bfd
*, struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd
*,
2591 extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn
2592 (bfd
*, arelent
*, struct bfd_symbol
*, void *,
2593 asection
*, bfd
*, char **);
2595 extern bfd_boolean bfd_elf_final_link
2596 (bfd
*, struct bfd_link_info
*);
2598 extern void _bfd_elf_gc_keep
2599 (struct bfd_link_info
*info
);
2601 extern bfd_boolean bfd_elf_gc_mark_dynamic_ref_symbol
2602 (struct elf_link_hash_entry
*h
, void *inf
);
2604 extern bfd_boolean bfd_elf_gc_sections
2605 (bfd
*, struct bfd_link_info
*);
2607 extern bfd_boolean bfd_elf_gc_record_vtinherit
2608 (bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
);
2610 extern bfd_boolean bfd_elf_gc_record_vtentry
2611 (bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
);
2613 extern asection
*_bfd_elf_gc_mark_hook
2614 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
2615 struct elf_link_hash_entry
*, Elf_Internal_Sym
*);
2617 extern asection
*_bfd_elf_gc_mark_rsec
2618 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
,
2619 struct elf_reloc_cookie
*, bfd_boolean
*);
2621 extern bfd_boolean _bfd_elf_gc_mark_reloc
2622 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
,
2623 struct elf_reloc_cookie
*);
2625 extern bfd_boolean _bfd_elf_gc_mark_fdes
2626 (struct bfd_link_info
*, asection
*, asection
*, elf_gc_mark_hook_fn
,
2627 struct elf_reloc_cookie
*);
2629 extern bfd_boolean _bfd_elf_gc_mark
2630 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
);
2632 extern bfd_boolean _bfd_elf_gc_mark_extra_sections
2633 (struct bfd_link_info
*, elf_gc_mark_hook_fn
);
2635 extern bfd_boolean bfd_elf_gc_common_finalize_got_offsets
2636 (bfd
*, struct bfd_link_info
*);
2638 extern bfd_boolean bfd_elf_gc_common_final_link
2639 (bfd
*, struct bfd_link_info
*);
2641 extern bfd_boolean bfd_elf_reloc_symbol_deleted_p
2644 extern struct elf_segment_map
* _bfd_elf_make_dynamic_segment
2645 (bfd
*, asection
*);
2647 extern bfd_boolean _bfd_elf_map_sections_to_segments
2648 (bfd
*, struct bfd_link_info
*);
2650 extern bfd_boolean
_bfd_elf_is_function_type (unsigned int);
2652 extern bfd_size_type
_bfd_elf_maybe_function_sym (const asymbol
*, asection
*,
2655 extern asection
*_bfd_elf_plt_get_reloc_section (bfd
*, const char *);
2657 extern int bfd_elf_get_default_section_type (flagword
);
2659 extern bfd_boolean bfd_elf_lookup_section_flags
2660 (struct bfd_link_info
*, struct flag_info
*, asection
*);
2662 extern Elf_Internal_Phdr
* _bfd_elf_find_segment_containing_section
2663 (bfd
* abfd
, asection
* section
);
2665 /* PowerPC @tls opcode transform/validate. */
2666 extern unsigned int _bfd_elf_ppc_at_tls_transform
2667 (unsigned int, unsigned int);
2668 /* PowerPC @tprel opcode transform/validate. */
2669 extern unsigned int _bfd_elf_ppc_at_tprel_transform
2670 (unsigned int, unsigned int);
2671 /* PowerPC elf_object_p tweak. */
2672 extern bfd_boolean
_bfd_elf_ppc_set_arch (bfd
*);
2673 /* PowerPC .gnu.attributes handling common to both 32-bit and 64-bit. */
2674 extern bfd_boolean _bfd_elf_ppc_merge_fp_attributes
2675 (bfd
*, struct bfd_link_info
*);
2677 /* Return an upper bound on the number of bytes required to store a
2678 copy of ABFD's program header table entries. Return -1 if an error
2679 occurs; bfd_get_error will return an appropriate code. */
2680 extern long bfd_get_elf_phdr_upper_bound
2683 /* Copy ABFD's program header table entries to *PHDRS. The entries
2684 will be stored as an array of Elf_Internal_Phdr structures, as
2685 defined in include/elf/internal.h. To find out how large the
2686 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
2688 Return the number of program header table entries read, or -1 if an
2689 error occurs; bfd_get_error will return an appropriate code. */
2690 extern int bfd_get_elf_phdrs
2691 (bfd
*abfd
, void *phdrs
);
2693 /* Exported interface for writing elf corefile notes. */
2694 extern char *elfcore_write_note
2695 (bfd
*, char *, int *, const char *, int, const void *, int);
2696 extern char *elfcore_write_prpsinfo
2697 (bfd
*, char *, int *, const char *, const char *);
2698 extern char *elfcore_write_prstatus
2699 (bfd
*, char *, int *, long, int, const void *);
2700 extern char * elfcore_write_pstatus
2701 (bfd
*, char *, int *, long, int, const void *);
2702 extern char *elfcore_write_prfpreg
2703 (bfd
*, char *, int *, const void *, int);
2704 extern char *elfcore_write_prxfpreg
2705 (bfd
*, char *, int *, const void *, int);
2706 extern char *elfcore_write_xstatereg
2707 (bfd
*, char *, int *, const void *, int);
2708 extern char *elfcore_write_ppc_vmx
2709 (bfd
*, char *, int *, const void *, int);
2710 extern char *elfcore_write_ppc_vsx
2711 (bfd
*, char *, int *, const void *, int);
2712 extern char *elfcore_write_ppc_tar
2713 (bfd
*, char *, int *, const void *, int);
2714 extern char *elfcore_write_ppc_ppr
2715 (bfd
*, char *, int *, const void *, int);
2716 extern char *elfcore_write_ppc_dscr
2717 (bfd
*, char *, int *, const void *, int);
2718 extern char *elfcore_write_ppc_ebb
2719 (bfd
*, char *, int *, const void *, int);
2720 extern char *elfcore_write_ppc_pmu
2721 (bfd
*, char *, int *, const void *, int);
2722 extern char *elfcore_write_ppc_tm_cgpr
2723 (bfd
*, char *, int *, const void *, int);
2724 extern char *elfcore_write_ppc_tm_cfpr
2725 (bfd
*, char *, int *, const void *, int);
2726 extern char *elfcore_write_ppc_tm_cvmx
2727 (bfd
*, char *, int *, const void *, int);
2728 extern char *elfcore_write_ppc_tm_cvsx
2729 (bfd
*, char *, int *, const void *, int);
2730 extern char *elfcore_write_ppc_tm_spr
2731 (bfd
*, char *, int *, const void *, int);
2732 extern char *elfcore_write_ppc_tm_ctar
2733 (bfd
*, char *, int *, const void *, int);
2734 extern char *elfcore_write_ppc_tm_cppr
2735 (bfd
*, char *, int *, const void *, int);
2736 extern char *elfcore_write_ppc_tm_cdscr
2737 (bfd
*, char *, int *, const void *, int);
2738 extern char *elfcore_write_s390_timer
2739 (bfd
*, char *, int *, const void *, int);
2740 extern char *elfcore_write_s390_todcmp
2741 (bfd
*, char *, int *, const void *, int);
2742 extern char *elfcore_write_s390_todpreg
2743 (bfd
*, char *, int *, const void *, int);
2744 extern char *elfcore_write_s390_ctrs
2745 (bfd
*, char *, int *, const void *, int);
2746 extern char *elfcore_write_s390_prefix
2747 (bfd
*, char *, int *, const void *, int);
2748 extern char *elfcore_write_s390_last_break
2749 (bfd
*, char *, int *, const void *, int);
2750 extern char *elfcore_write_s390_system_call
2751 (bfd
*, char *, int *, const void *, int);
2752 extern char *elfcore_write_s390_tdb
2753 (bfd
*, char *, int *, const void *, int);
2754 extern char *elfcore_write_s390_vxrs_low
2755 (bfd
*, char *, int *, const void *, int);
2756 extern char *elfcore_write_s390_vxrs_high
2757 (bfd
*, char *, int *, const void *, int);
2758 extern char *elfcore_write_s390_gs_cb
2759 (bfd
*, char *, int *, const void *, int);
2760 extern char *elfcore_write_s390_gs_bc
2761 (bfd
*, char *, int *, const void *, int);
2762 extern char *elfcore_write_arm_vfp
2763 (bfd
*, char *, int *, const void *, int);
2764 extern char *elfcore_write_aarch_tls
2765 (bfd
*, char *, int *, const void *, int);
2766 extern char *elfcore_write_aarch_hw_break
2767 (bfd
*, char *, int *, const void *, int);
2768 extern char *elfcore_write_aarch_hw_watch
2769 (bfd
*, char *, int *, const void *, int);
2770 extern char *elfcore_write_aarch_sve
2771 (bfd
*, char *, int *, const void *, int);
2772 extern char *elfcore_write_aarch_pauth
2773 (bfd
*, char *, int *, const void *, int);
2774 extern char *elfcore_write_arc_v2
2775 (bfd
*, char *, int *, const void *, int);
2776 extern char *elfcore_write_lwpstatus
2777 (bfd
*, char *, int *, long, int, const void *);
2778 extern char *elfcore_write_register_note
2779 (bfd
*, char *, int *, const char *, const void *, int);
2781 /* Internal structure which holds information to be included in the
2782 PRPSINFO section of Linux core files.
2784 This is an "internal" structure in the sense that it should be used
2785 to pass information to BFD (via the `elfcore_write_linux_prpsinfo'
2786 function), so things like endianess shouldn't be an issue. This
2787 structure will eventually be converted in one of the
2788 `elf_external_linux_*' structures and written out to an output bfd
2789 by one of the functions declared below. */
2791 struct elf_internal_linux_prpsinfo
2793 char pr_state
; /* Numeric process state. */
2794 char pr_sname
; /* Char for pr_state. */
2795 char pr_zomb
; /* Zombie. */
2796 char pr_nice
; /* Nice val. */
2797 unsigned long pr_flag
; /* Flags. */
2798 unsigned int pr_uid
;
2799 unsigned int pr_gid
;
2800 int pr_pid
, pr_ppid
, pr_pgrp
, pr_sid
;
2801 char pr_fname
[16 + 1]; /* Filename of executable. */
2802 char pr_psargs
[80 + 1]; /* Initial part of arg list. */
2805 /* Linux/most 32-bit archs. */
2806 extern char *elfcore_write_linux_prpsinfo32
2807 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
2809 /* Linux/most 64-bit archs. */
2810 extern char *elfcore_write_linux_prpsinfo64
2811 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
2813 extern bfd
*_bfd_elf32_bfd_from_remote_memory
2814 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
2815 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, bfd_size_type
));
2816 extern bfd
*_bfd_elf64_bfd_from_remote_memory
2817 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
2818 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, bfd_size_type
));
2820 extern bfd_vma
bfd_elf_obj_attr_size (bfd
*);
2821 extern void bfd_elf_set_obj_attr_contents (bfd
*, bfd_byte
*, bfd_vma
);
2822 extern int bfd_elf_get_obj_attr_int (bfd
*, int, unsigned int);
2823 extern void bfd_elf_add_obj_attr_int (bfd
*, int, unsigned int, unsigned int);
2824 #define bfd_elf_add_proc_attr_int(BFD, TAG, VALUE) \
2825 bfd_elf_add_obj_attr_int ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2826 extern void bfd_elf_add_obj_attr_string (bfd
*, int, unsigned int, const char *);
2827 #define bfd_elf_add_proc_attr_string(BFD, TAG, VALUE) \
2828 bfd_elf_add_obj_attr_string ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2829 extern void bfd_elf_add_obj_attr_int_string (bfd
*, int, unsigned int,
2830 unsigned int, const char *);
2831 #define bfd_elf_add_proc_attr_int_string(BFD, TAG, INTVAL, STRVAL) \
2832 bfd_elf_add_obj_attr_int_string ((BFD), OBJ_ATTR_PROC, (TAG), \
2835 extern char *_bfd_elf_attr_strdup (bfd
*, const char *);
2836 extern void _bfd_elf_copy_obj_attributes (bfd
*, bfd
*);
2837 extern int _bfd_elf_obj_attrs_arg_type (bfd
*, int, unsigned int);
2838 extern void _bfd_elf_parse_attributes (bfd
*, Elf_Internal_Shdr
*);
2839 extern bfd_boolean _bfd_elf_merge_object_attributes
2840 (bfd
*, struct bfd_link_info
*);
2841 extern bfd_boolean
_bfd_elf_merge_unknown_attribute_low (bfd
*, bfd
*, int);
2842 extern bfd_boolean
_bfd_elf_merge_unknown_attribute_list (bfd
*, bfd
*);
2843 extern Elf_Internal_Shdr
*_bfd_elf_single_rel_hdr (asection
*sec
);
2844 extern bfd_boolean
elf_read_notes (bfd
*, file_ptr
, bfd_size_type
, size_t);
2846 extern bfd_boolean _bfd_elf_parse_gnu_properties
2847 (bfd
*, Elf_Internal_Note
*);
2848 extern elf_property
* _bfd_elf_get_property
2849 (bfd
*, unsigned int, unsigned int);
2850 extern bfd
*_bfd_elf_link_setup_gnu_properties
2851 (struct bfd_link_info
*);
2852 extern bfd_size_type _bfd_elf_convert_gnu_property_size
2854 extern bfd_boolean _bfd_elf_convert_gnu_properties
2855 (bfd
*, asection
*, bfd
*, bfd_byte
**, bfd_size_type
*);
2857 /* The linker may need to keep track of the number of relocs that it
2858 decides to copy as dynamic relocs in check_relocs for each symbol.
2859 This is so that it can later discard them if they are found to be
2860 unnecessary. We can store the information in a field extending the
2861 regular ELF linker hash table. */
2863 struct elf_dyn_relocs
2865 struct elf_dyn_relocs
*next
;
2867 /* The input section of the reloc. */
2870 /* Total number of relocs copied for the input section. */
2871 bfd_size_type count
;
2873 /* Number of pc-relative relocs copied for the input section. */
2874 bfd_size_type pc_count
;
2877 extern bfd_boolean _bfd_elf_create_ifunc_sections
2878 (bfd
*, struct bfd_link_info
*);
2879 extern bfd_boolean _bfd_elf_allocate_ifunc_dyn_relocs
2880 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
2881 struct elf_dyn_relocs
**, unsigned int, unsigned int,
2882 unsigned int, bfd_boolean
);
2884 extern void elf_append_rela (bfd
*, asection
*, Elf_Internal_Rela
*);
2885 extern void elf_append_rel (bfd
*, asection
*, Elf_Internal_Rela
*);
2887 extern bfd_vma
elf64_r_info (bfd_vma
, bfd_vma
);
2888 extern bfd_vma
elf64_r_sym (bfd_vma
);
2889 extern bfd_vma
elf32_r_info (bfd_vma
, bfd_vma
);
2890 extern bfd_vma
elf32_r_sym (bfd_vma
);
2892 extern bfd_boolean
is_debuginfo_file (bfd
*);
2895 extern bfd_boolean _bfd_elf_init_secondary_reloc_section
2896 (bfd
*, Elf_Internal_Shdr
*, const char *, unsigned int);
2897 extern bfd_boolean _bfd_elf_slurp_secondary_reloc_section
2898 (bfd
*, asection
*, asymbol
**);
2899 extern bfd_boolean _bfd_elf_copy_special_section_fields
2900 (const bfd
*, bfd
*, const Elf_Internal_Shdr
*, Elf_Internal_Shdr
*);
2901 extern bfd_boolean _bfd_elf_write_secondary_reloc_section
2902 (bfd
*, asection
*);
2903 extern unsigned int _bfd_elf_symbol_section_index
2904 (bfd
*, elf_symbol_type
*);
2906 extern asection
*_bfd_elf_readonly_dynrelocs
2907 (struct elf_link_hash_entry
*);
2908 extern bfd_boolean _bfd_elf_maybe_set_textrel
2909 (struct elf_link_hash_entry
*, void *);
2911 /* Large common section. */
2912 extern asection _bfd_elf_large_com_section
;
2914 /* Hash for local symbol with the first section id, ID, in the input
2915 file and the local symbol index, SYM. */
2916 #define ELF_LOCAL_SYMBOL_HASH(ID, SYM) \
2917 (((((ID) & 0xffU) << 24) | (((ID) & 0xff00) << 8)) \
2918 ^ (SYM) ^ (((ID) & 0xffff0000U) >> 16))
2920 /* This is the condition under which finish_dynamic_symbol will be called.
2921 If our finish_dynamic_symbol isn't called, we'll need to do something
2922 about initializing any .plt and .got entries in relocate_section. */
2923 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
2925 && ((SHARED) || !(H)->forced_local) \
2926 && ((H)->dynindx != -1 || (H)->forced_local))
2928 /* This macro is to avoid lots of duplicated code in the body
2929 of xxx_relocate_section() in the various elfxx-xxxx.c files. */
2930 #define RELOC_FOR_GLOBAL_SYMBOL(info, input_bfd, input_section, rel, \
2931 r_symndx, symtab_hdr, sym_hashes, \
2932 h, sec, relocation, \
2933 unresolved_reloc, warned, ignored) \
2936 /* It seems this can happen with erroneous or unsupported \
2937 input (mixing a.out and elf in an archive, for example.) */ \
2938 if (sym_hashes == NULL) \
2941 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; \
2943 if (info->wrap_hash != NULL \
2944 && (input_section->flags & SEC_DEBUGGING) != 0) \
2945 h = ((struct elf_link_hash_entry *) \
2946 unwrap_hash_lookup (info, input_bfd, &h->root)); \
2948 while (h->root.type == bfd_link_hash_indirect \
2949 || h->root.type == bfd_link_hash_warning) \
2950 h = (struct elf_link_hash_entry *) h->root.u.i.link; \
2954 unresolved_reloc = FALSE; \
2956 if (h->root.type == bfd_link_hash_defined \
2957 || h->root.type == bfd_link_hash_defweak) \
2959 sec = h->root.u.def.section; \
2961 || sec->output_section == NULL) \
2962 /* Set a flag that will be cleared later if we find a \
2963 relocation value for this symbol. output_section \
2964 is typically NULL for symbols satisfied by a shared \
2966 unresolved_reloc = TRUE; \
2968 relocation = (h->root.u.def.value \
2969 + sec->output_section->vma \
2970 + sec->output_offset); \
2972 else if (h->root.type == bfd_link_hash_undefweak) \
2974 else if (info->unresolved_syms_in_objects == RM_IGNORE \
2975 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) \
2977 else if (!bfd_link_relocatable (info)) \
2980 err = (info->unresolved_syms_in_objects == RM_DIAGNOSE && \
2981 !info->warn_unresolved_syms) \
2982 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT; \
2983 (*info->callbacks->undefined_symbol) (info, \
2984 h->root.root.string, \
2987 rel->r_offset, err); \
2990 (void) unresolved_reloc; \
2996 /* This macro is to avoid lots of duplicated code in the body of the
2997 loop over relocations in xxx_relocate_section() in the various
3000 Handle relocations against symbols from removed linkonce sections,
3001 or sections discarded by a linker script. When doing a relocatable
3002 link, we remove such relocations. Otherwise, we just want the
3003 section contents zeroed and avoid any special processing. */
3004 #define RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
3005 rel, count, relend, \
3006 howto, index, contents) \
3009 _bfd_clear_contents (howto, input_bfd, input_section, \
3010 contents, rel[index].r_offset); \
3012 if (bfd_link_relocatable (info) \
3013 && (input_section->flags & SEC_DEBUGGING)) \
3015 /* Only remove relocations in debug sections since other \
3016 sections may require relocations. */ \
3017 Elf_Internal_Shdr *rel_hdr; \
3019 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
3021 /* Avoid empty output section. */ \
3022 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
3024 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
3025 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
3026 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
3028 memmove (rel, rel + count, \
3029 (relend - rel - count) * sizeof (*rel)); \
3031 input_section->reloc_count -= count; \
3038 for (i_ = 0; i_ < count; i_++) \
3040 rel[i_].r_info = 0; \
3041 rel[i_].r_addend = 0; \
3047 /* Will a symbol be bound to the definition within the shared
3048 library, if any. A unique symbol can never be bound locally. */
3049 #define SYMBOLIC_BIND(INFO, H) \
3050 (!(H)->unique_global \
3051 && ((INFO)->symbolic \
3052 || (H)->start_stop \
3053 || ((INFO)->dynamic && !(H)->dynamic)))
3055 /* Determine if a section contains CTF data, using its name. */
3056 static inline bfd_boolean
3057 bfd_section_is_ctf (const asection
*sec
)
3059 const char *name
= bfd_section_name (sec
);
3060 return strncmp (name
, ".ctf", 4) == 0 && (name
[4] == 0 || name
[4] == '.');
3066 #endif /* _LIBELF_H_ */