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 /* Used by bfd_sym_from_r_symndx to cache a small number of local
554 #define LOCAL_SYM_CACHE_SIZE 32
558 unsigned long indx
[LOCAL_SYM_CACHE_SIZE
];
559 Elf_Internal_Sym sym
[LOCAL_SYM_CACHE_SIZE
];
562 /* ELF linker hash table. */
564 struct elf_link_hash_table
566 struct bfd_link_hash_table root
;
568 /* An identifier used to distinguish different target
569 specific extensions to this structure. */
570 enum elf_target_id hash_table_id
;
572 /* Whether we have created the special dynamic sections required
573 when linking against or generating a shared object. */
574 bfd_boolean dynamic_sections_created
;
576 /* Whether dynamic relocations are present. */
577 bfd_boolean dynamic_relocs
;
579 /* True if this target has relocatable executables, so needs dynamic
581 bfd_boolean is_relocatable_executable
;
583 /* TRUE if there are IFUNC resolvers. */
584 bfd_boolean ifunc_resolvers
;
586 /* TRUE if DT_PLTGOT is a required dynamic tag. */
587 bfd_boolean dt_pltgot_required
;
589 /* TRUE if DT_JMPREL is a required dynamic tag. */
590 bfd_boolean dt_jmprel_required
;
592 /* The BFD used to hold special sections created by the linker.
593 This will be the first BFD found which requires these sections to
597 /* The value to use when initialising got.refcount/offset and
598 plt.refcount/offset in an elf_link_hash_entry. Set to zero when
599 the values are refcounts. Set to init_got_offset/init_plt_offset
600 in size_dynamic_sections when the values may be offsets. */
601 union gotplt_union init_got_refcount
;
602 union gotplt_union init_plt_refcount
;
604 /* The value to use for got.refcount/offset and plt.refcount/offset
605 when the values may be offsets. Normally (bfd_vma) -1. */
606 union gotplt_union init_got_offset
;
607 union gotplt_union init_plt_offset
;
609 /* The number of symbols found in the link which is intended for the
610 mandatory DT_SYMTAB tag (.dynsym section) in .dynamic section. */
611 bfd_size_type dynsymcount
;
612 bfd_size_type local_dynsymcount
;
614 /* The string table of dynamic symbols, which becomes the .dynstr
616 struct elf_strtab_hash
*dynstr
;
618 /* The number of symbol strings found in the link which must be put
619 into the .strtab section. */
620 bfd_size_type strtabcount
;
622 /* The array size of the symbol string table, which becomes the
624 bfd_size_type strtabsize
;
626 /* The array of strings, which becomes the .strtab section. */
627 struct elf_sym_strtab
*strtab
;
629 /* The number of buckets in the hash table in the .hash section.
630 This is based on the number of dynamic symbols. */
631 bfd_size_type bucketcount
;
633 /* A linked list of DT_NEEDED names found in dynamic objects
634 included in the link. */
635 struct bfd_link_needed_list
*needed
;
637 /* Sections in the output bfd that provides a section symbol
638 to be used by relocations emitted against local symbols.
639 Most targets will not use data_index_section. */
640 asection
*text_index_section
;
641 asection
*data_index_section
;
643 /* The _GLOBAL_OFFSET_TABLE_ symbol. */
644 struct elf_link_hash_entry
*hgot
;
646 /* The _PROCEDURE_LINKAGE_TABLE_ symbol. */
647 struct elf_link_hash_entry
*hplt
;
649 /* The _DYNAMIC symbol. */
650 struct elf_link_hash_entry
*hdynamic
;
652 /* A pointer to information used to merge SEC_MERGE sections. */
655 /* Used to link stabs in sections. */
656 struct stab_info stab_info
;
658 /* Used by eh_frame code when editing .eh_frame. */
659 struct eh_frame_hdr_info eh_info
;
661 /* A linked list of local symbols to be added to .dynsym. */
662 struct elf_link_local_dynamic_entry
*dynlocal
;
664 /* A linked list of DT_RPATH/DT_RUNPATH names found in dynamic
665 objects included in the link. */
666 struct bfd_link_needed_list
*runpath
;
668 /* Cached first output tls section and size of PT_TLS segment. */
670 bfd_size_type tls_size
; /* Bytes. */
672 /* The offset into splt of the PLT entry for the TLS descriptor
673 resolver. Special values are 0, if not necessary (or not found
674 to be necessary yet), and -1 if needed but not determined
678 /* The GOT offset for the lazy trampoline. Communicated to the
679 loader via DT_TLSDESC_GOT. The magic value (bfd_vma) -1
680 indicates an offset is not allocated. */
683 /* Target OS for linker output. */
684 enum elf_target_os target_os
;
686 /* A linked list of dynamic BFD's loaded in the link. */
687 struct elf_link_loaded_list
*dyn_loaded
;
689 /* Small local sym cache. */
690 struct sym_cache sym_cache
;
692 /* Short-cuts to get to dynamic linker sections. */
701 asection
*sreldynrelro
;
709 /* Look up an entry in an ELF linker hash table. */
711 #define elf_link_hash_lookup(table, string, create, copy, follow) \
712 ((struct elf_link_hash_entry *) \
713 bfd_link_hash_lookup (&(table)->root, (string), (create), \
716 /* Traverse an ELF linker hash table. */
718 #define elf_link_hash_traverse(table, func, info) \
719 (bfd_link_hash_traverse \
721 (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func), \
724 /* Get the ELF linker hash table from a link_info structure. */
726 #define elf_hash_table(p) ((struct elf_link_hash_table *) ((p)->hash))
728 #define elf_hash_table_id(table) ((table) -> hash_table_id)
730 /* Returns TRUE if the hash table is a struct elf_link_hash_table. */
731 #define is_elf_hash_table(htab) \
732 (((struct bfd_link_hash_table *) (htab))->type == bfd_link_elf_hash_table)
734 /* Constant information held for an ELF backend. */
736 struct elf_size_info
{
737 unsigned char sizeof_ehdr
, sizeof_phdr
, sizeof_shdr
;
738 unsigned char sizeof_rel
, sizeof_rela
, sizeof_sym
, sizeof_dyn
, sizeof_note
;
740 /* The size of entries in the .hash section. */
741 unsigned char sizeof_hash_entry
;
743 /* The number of internal relocations to allocate per external
745 unsigned char int_rels_per_ext_rel
;
746 /* We use some fixed size arrays. This should be large enough to
747 handle all back-ends. */
748 #define MAX_INT_RELS_PER_EXT_REL 3
750 unsigned char arch_size
, log_file_align
;
751 unsigned char elfclass
, ev_current
;
752 int (*write_out_phdrs
)
753 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
755 (*write_shdrs_and_ehdr
) (bfd
*);
756 bfd_boolean (*checksum_contents
)
757 (bfd
* , void (*) (const void *, size_t, void *), void *);
759 (bfd
*, asection
*, void *);
760 bfd_boolean (*swap_symbol_in
)
761 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
762 void (*swap_symbol_out
)
763 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
764 bfd_boolean (*slurp_reloc_table
)
765 (bfd
*, asection
*, asymbol
**, bfd_boolean
);
766 long (*slurp_symbol_table
)
767 (bfd
*, asymbol
**, bfd_boolean
);
769 (bfd
*, const void *, Elf_Internal_Dyn
*);
771 (bfd
*, const Elf_Internal_Dyn
*, void *);
773 /* This function is called to swap in a REL relocation. If an
774 external relocation corresponds to more than one internal
775 relocation, then all relocations are swapped in at once. */
776 void (*swap_reloc_in
)
777 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
779 /* This function is called to swap out a REL relocation. */
780 void (*swap_reloc_out
)
781 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
783 /* This function is called to swap in a RELA relocation. If an
784 external relocation corresponds to more than one internal
785 relocation, then all relocations are swapped in at once. */
786 void (*swap_reloca_in
)
787 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
789 /* This function is called to swap out a RELA relocation. */
790 void (*swap_reloca_out
)
791 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
794 #define elf_symbol_from(ABFD,S) \
795 (((S)->the_bfd != NULL \
796 && (S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \
797 && (S)->the_bfd->tdata.elf_obj_data != 0) \
798 ? (elf_symbol_type *) (S) \
801 enum elf_reloc_type_class
{
803 reloc_class_relative
,
809 struct elf_reloc_cookie
811 Elf_Internal_Rela
*rels
, *rel
, *relend
;
812 Elf_Internal_Sym
*locsyms
;
816 struct elf_link_hash_entry
**sym_hashes
;
818 bfd_boolean bad_symtab
;
821 /* The level of IRIX compatibility we're striving for. */
829 /* Mapping of ELF section names and types. */
830 struct bfd_elf_special_section
833 unsigned int prefix_length
;
834 /* 0 means name must match PREFIX exactly.
835 -1 means name must start with PREFIX followed by an arbitrary string.
836 -2 means name must match PREFIX exactly or consist of PREFIX followed
837 by a dot then anything.
838 > 0 means name must start with the first PREFIX_LENGTH chars of
839 PREFIX and finish with the last SUFFIX_LENGTH chars of PREFIX. */
840 signed int suffix_length
;
845 enum action_discarded
851 typedef asection
* (*elf_gc_mark_hook_fn
)
852 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
853 struct elf_link_hash_entry
*, Elf_Internal_Sym
*);
855 enum elf_property_kind
857 /* A new property. */
858 property_unknown
= 0,
859 /* A property ignored by backend. */
861 /* A corrupt property reported by backend. */
863 /* A property should be removed due to property merge. */
865 /* A property which is a number. */
869 typedef struct elf_property
871 unsigned int pr_type
;
872 unsigned int pr_datasz
;
875 /* For property_number, this is a number. */
877 /* Add a new one if elf_property_kind is updated. */
879 enum elf_property_kind pr_kind
;
882 typedef struct elf_property_list
884 struct elf_property_list
*next
;
885 struct elf_property property
;
888 struct bfd_elf_section_reloc_data
;
890 struct elf_backend_data
892 /* The architecture for this backend. */
893 enum bfd_architecture arch
;
895 /* An identifier used to distinguish different target specific
896 extensions to elf_obj_tdata and elf_link_hash_table structures. */
897 enum elf_target_id target_id
;
900 enum elf_target_os target_os
;
902 /* The ELF machine code (EM_xxxx) for this backend. */
903 int elf_machine_code
;
908 /* The maximum page size for this backend. */
911 /* The minimum page size for this backend. An input object will not be
912 considered page aligned unless its sections are correctly aligned for
913 pages at least this large. May be smaller than maxpagesize. */
916 /* The common page size for this backend. */
917 bfd_vma commonpagesize
;
919 /* The value of commonpagesize to use when -z relro for this backend. */
920 bfd_vma relropagesize
;
922 /* The BFD flags applied to sections created for dynamic linking. */
923 flagword dynamic_sec_flags
;
925 /* Architecture-specific data for this backend.
926 This is actually a pointer to some type like struct elf_ARCH_data. */
927 const void *arch_data
;
929 /* A function to translate an ELF RELA relocation to a BFD arelent
930 structure. Returns TRUE upon success, FALSE otherwise. */
931 bfd_boolean (*elf_info_to_howto
)
932 (bfd
*, arelent
*, Elf_Internal_Rela
*);
934 /* A function to translate an ELF REL relocation to a BFD arelent
935 structure. Returns TRUE upon success, FALSE otherwise. */
936 bfd_boolean (*elf_info_to_howto_rel
)
937 (bfd
*, arelent
*, Elf_Internal_Rela
*);
939 /* A function to determine whether a symbol is global when
940 partitioning the symbol table into local and global symbols.
941 This should be NULL for most targets, in which case the correct
942 thing will be done. MIPS ELF, at least on the Irix 5, has
943 special requirements. */
944 bfd_boolean (*elf_backend_sym_is_global
)
947 /* The remaining functions are hooks which are called only if they
950 /* A function to permit a backend specific check on whether a
951 particular BFD format is relevant for an object file, and to
952 permit the backend to set any global information it wishes. When
953 this is called elf_elfheader is set, but anything else should be
954 used with caution. If this returns FALSE, the check_format
955 routine will return a bfd_error_wrong_format error. */
956 bfd_boolean (*elf_backend_object_p
)
959 /* A function to do additional symbol processing when reading the
960 ELF symbol table. This is where any processor-specific special
961 section indices are handled. */
962 void (*elf_backend_symbol_processing
)
965 /* A function to do additional symbol processing after reading the
966 entire ELF symbol table. */
967 bfd_boolean (*elf_backend_symbol_table_processing
)
968 (bfd
*, elf_symbol_type
*, unsigned int);
970 /* A function to set the type of the info field. Processor-specific
971 types should be handled here. */
972 int (*elf_backend_get_symbol_type
)
973 (Elf_Internal_Sym
*, int);
975 /* A function to return the linker hash table entry of a symbol that
976 might be satisfied by an archive symbol. */
977 struct elf_link_hash_entry
* (*elf_backend_archive_symbol_lookup
)
978 (bfd
*, struct bfd_link_info
*, const char *);
980 /* Return true if local section symbols should have a non-null st_name.
981 NULL implies false. */
982 bfd_boolean (*elf_backend_name_local_section_symbols
)
985 /* A function to do additional processing on the ELF section header
986 just before writing it out. This is used to set the flags and
987 type fields for some sections, or to actually write out data for
989 bfd_boolean (*elf_backend_section_processing
)
990 (bfd
*, Elf_Internal_Shdr
*);
992 /* A function to handle unusual section types when creating BFD
993 sections from ELF sections. */
994 bfd_boolean (*elf_backend_section_from_shdr
)
995 (bfd
*, Elf_Internal_Shdr
*, const char *, int);
997 /* A function to convert machine dependent ELF section header flags to
998 BFD internal section header flags. */
999 bfd_boolean (*elf_backend_section_flags
)
1000 (const Elf_Internal_Shdr
*);
1002 /* A function that returns a struct containing ELF section flags and
1003 type for the given BFD section. */
1004 const struct bfd_elf_special_section
* (*get_sec_type_attr
)
1005 (bfd
*, asection
*);
1007 /* A function to handle unusual program segment types when creating BFD
1008 sections from ELF program segments. */
1009 bfd_boolean (*elf_backend_section_from_phdr
)
1010 (bfd
*, Elf_Internal_Phdr
*, int, const char *);
1012 /* A function to set up the ELF section header for a BFD section in
1013 preparation for writing it out. This is where the flags and type
1014 fields are set for unusual sections. */
1015 bfd_boolean (*elf_backend_fake_sections
)
1016 (bfd
*, Elf_Internal_Shdr
*, asection
*);
1018 /* A function to get the ELF section index for a BFD section. If
1019 this returns TRUE, the section was found. If it is a normal ELF
1020 section, *RETVAL should be left unchanged. If it is not a normal
1021 ELF section *RETVAL should be set to the SHN_xxxx index. */
1022 bfd_boolean (*elf_backend_section_from_bfd_section
)
1023 (bfd
*, asection
*, int *retval
);
1025 /* If this field is not NULL, it is called by the add_symbols phase
1026 of a link just before adding a symbol to the global linker hash
1027 table. It may modify any of the fields as it wishes. If *NAME
1028 is set to NULL, the symbol will be skipped rather than being
1029 added to the hash table. This function is responsible for
1030 handling all processor dependent symbol bindings and section
1031 indices, and must set at least *FLAGS and *SEC for each processor
1032 dependent case; failure to do so will cause a link error. */
1033 bfd_boolean (*elf_add_symbol_hook
)
1034 (bfd
*abfd
, struct bfd_link_info
*info
, Elf_Internal_Sym
*,
1035 const char **name
, flagword
*flags
, asection
**sec
, bfd_vma
*value
);
1037 /* If this field is not NULL, it is called by the elf_link_output_sym
1038 phase of a link for each symbol which will appear in the object file.
1039 On error, this function returns 0. 1 is returned when the symbol
1040 should be output, 2 is returned when the symbol should be discarded. */
1041 int (*elf_backend_link_output_symbol_hook
)
1042 (struct bfd_link_info
*info
, const char *, Elf_Internal_Sym
*,
1043 asection
*, struct elf_link_hash_entry
*);
1045 /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend
1046 linker the first time it encounters a dynamic object in the link.
1047 This function must create any sections required for dynamic
1048 linking. The ABFD argument is a dynamic object. The .interp,
1049 .dynamic, .dynsym, .dynstr, and .hash functions have already been
1050 created, and this function may modify the section flags if
1051 desired. This function will normally create the .got and .plt
1052 sections, but different backends have different requirements. */
1053 bfd_boolean (*elf_backend_create_dynamic_sections
)
1054 (bfd
*abfd
, struct bfd_link_info
*info
);
1056 /* When creating a shared library, determine whether to omit the
1057 dynamic symbol for the section. */
1058 bfd_boolean (*elf_backend_omit_section_dynsym
)
1059 (bfd
*output_bfd
, struct bfd_link_info
*info
, asection
*osec
);
1061 /* Return TRUE if relocations of targets are compatible to the extent
1062 that CHECK_RELOCS will properly process them. PR 4424. */
1063 bfd_boolean (*relocs_compatible
) (const bfd_target
*, const bfd_target
*);
1065 /* The CHECK_RELOCS function is called by the add_symbols phase of
1066 the ELF backend linker. It is called once for each section with
1067 relocs of an object file, just after the symbols for the object
1068 file have been added to the global linker hash table. The
1069 function must look through the relocs and do any special handling
1070 required. This generally means allocating space in the global
1071 offset table, and perhaps allocating space for a reloc. The
1072 relocs are always passed as Rela structures; if the section
1073 actually uses Rel structures, the r_addend field will always be
1075 bfd_boolean (*check_relocs
)
1076 (bfd
*abfd
, struct bfd_link_info
*info
, asection
*o
,
1077 const Elf_Internal_Rela
*relocs
);
1079 /* The CHECK_DIRECTIVES function is called once per input file by
1080 the add_symbols phase of the ELF backend linker. The function
1081 must inspect the bfd and create any additional symbols according
1082 to any custom directives in the bfd. */
1083 bfd_boolean (*check_directives
)
1084 (bfd
*abfd
, struct bfd_link_info
*info
);
1086 /* The NOTICE_AS_NEEDED function is called as the linker is about to
1087 handle an as-needed lib (ACT = notice_as_needed), and after the
1088 linker has decided to keep the lib (ACT = notice_needed) or when
1089 the lib is not needed (ACT = notice_not_needed). */
1090 bfd_boolean (*notice_as_needed
)
1091 (bfd
*abfd
, struct bfd_link_info
*info
, enum notice_asneeded_action act
);
1093 /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
1094 linker for every symbol which is defined by a dynamic object and
1095 referenced by a regular object. This is called after all the
1096 input files have been seen, but before the SIZE_DYNAMIC_SECTIONS
1097 function has been called. The hash table entry should be
1098 bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be
1099 defined in a section from a dynamic object. Dynamic object
1100 sections are not included in the final link, and this function is
1101 responsible for changing the value to something which the rest of
1102 the link can deal with. This will normally involve adding an
1103 entry to the .plt or .got or some such section, and setting the
1104 symbol to point to that. */
1105 bfd_boolean (*elf_backend_adjust_dynamic_symbol
)
1106 (struct bfd_link_info
*info
, struct elf_link_hash_entry
*h
);
1108 /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker
1109 after all the linker input files have been seen but before the
1110 section sizes have been set. This is called after
1111 ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS. */
1112 bfd_boolean (*elf_backend_always_size_sections
)
1113 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1115 /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend
1116 linker after all the linker input files have been seen but before
1117 the sections sizes have been set. This is called after
1118 ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols.
1119 It is only called when linking against a dynamic object. It must
1120 set the sizes of the dynamic sections, and may fill in their
1121 contents as well. The generic ELF linker can handle the .dynsym,
1122 .dynstr and .hash sections. This function must handle the
1123 .interp section and any sections created by the
1124 CREATE_DYNAMIC_SECTIONS entry point. */
1125 bfd_boolean (*elf_backend_size_dynamic_sections
)
1126 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1128 /* The STRIP_ZERO_SIZED_DYNAMIC_SECTIONS function is called by the
1129 ELF backend linker to strip zero-sized dynamic sections after
1130 the section sizes have been set. */
1131 bfd_boolean (*elf_backend_strip_zero_sized_dynamic_sections
)
1132 (struct bfd_link_info
*info
);
1134 /* Set TEXT_INDEX_SECTION and DATA_INDEX_SECTION, the output sections
1135 we keep to use as a base for relocs and symbols. */
1136 void (*elf_backend_init_index_section
)
1137 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1139 /* The RELOCATE_SECTION function is called by the ELF backend linker
1140 to handle the relocations for a section.
1142 The relocs are always passed as Rela structures; if the section
1143 actually uses Rel structures, the r_addend field will always be
1146 This function is responsible for adjust the section contents as
1147 necessary, and (if using Rela relocs and generating a
1148 relocatable output file) adjusting the reloc addend as
1151 This function does not have to worry about setting the reloc
1152 address or the reloc symbol index.
1154 LOCAL_SYMS is a pointer to the swapped in local symbols.
1156 LOCAL_SECTIONS is an array giving the section in the input file
1157 corresponding to the st_shndx field of each local symbol.
1159 The global hash table entry for the global symbols can be found
1160 via elf_sym_hashes (input_bfd).
1162 When generating relocatable output, this function must handle
1163 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
1164 going to be the section symbol corresponding to the output
1165 section, which means that the addend must be adjusted
1168 Returns FALSE on error, TRUE on success, 2 if successful and
1169 relocations should be written for this section. */
1170 int (*elf_backend_relocate_section
)
1171 (bfd
*output_bfd
, struct bfd_link_info
*info
, bfd
*input_bfd
,
1172 asection
*input_section
, bfd_byte
*contents
, Elf_Internal_Rela
*relocs
,
1173 Elf_Internal_Sym
*local_syms
, asection
**local_sections
);
1175 /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend
1176 linker just before it writes a symbol out to the .dynsym section.
1177 The processor backend may make any required adjustment to the
1178 symbol. It may also take the opportunity to set contents of the
1179 dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on
1180 all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called
1181 on those symbols which are defined by a dynamic object. */
1182 bfd_boolean (*elf_backend_finish_dynamic_symbol
)
1183 (bfd
*output_bfd
, struct bfd_link_info
*info
,
1184 struct elf_link_hash_entry
*h
, Elf_Internal_Sym
*sym
);
1186 /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend
1187 linker just before it writes all the dynamic sections out to the
1188 output file. The FINISH_DYNAMIC_SYMBOL will have been called on
1189 all dynamic symbols. */
1190 bfd_boolean (*elf_backend_finish_dynamic_sections
)
1191 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1193 /* A function to do any beginning processing needed for the ELF file
1194 before building the ELF headers and computing file positions. */
1195 void (*elf_backend_begin_write_processing
)
1196 (bfd
*, struct bfd_link_info
*);
1198 /* A function to do any final processing needed for the ELF file
1199 before writing it out. */
1200 bfd_boolean (*elf_backend_final_write_processing
)
1203 /* This function is called by get_program_header_size. It should
1204 return the number of additional program segments which this BFD
1205 will need. It should return -1 on error. */
1206 int (*elf_backend_additional_program_headers
)
1207 (bfd
*, struct bfd_link_info
*);
1209 /* This function is called to modify an existing segment map in a
1210 backend specific fashion. */
1211 bfd_boolean (*elf_backend_modify_segment_map
)
1212 (bfd
*, struct bfd_link_info
*);
1214 /* This function is called to modify program headers just before
1215 they are written. */
1216 bfd_boolean (*elf_backend_modify_headers
)
1217 (bfd
*, struct bfd_link_info
*);
1219 /* This function is called to see if the PHDR header should be
1220 checked for validity. */
1221 bfd_boolean (*elf_backend_allow_non_load_phdr
)
1222 (bfd
*, const Elf_Internal_Phdr
*, unsigned);
1224 /* This function is called before section garbage collection to
1225 mark entry symbol sections. */
1227 (struct bfd_link_info
*);
1229 /* This function is called during section garbage collection to
1230 mark sections that define global symbols. */
1231 bfd_boolean (*gc_mark_dynamic_ref
)
1232 (struct elf_link_hash_entry
*, void *);
1234 /* This function is called during section gc to discover the section a
1235 particular relocation refers to. */
1236 elf_gc_mark_hook_fn gc_mark_hook
;
1238 /* This function, if defined, is called after the first gc marking pass
1239 to allow the backend to mark additional sections. */
1240 bfd_boolean (*gc_mark_extra_sections
)
1241 (struct bfd_link_info
*, elf_gc_mark_hook_fn
);
1243 /* This function is called to initialise ELF file header info.
1244 Customised versions can modify things like the OS and ABI version. */
1245 bfd_boolean (*elf_backend_init_file_header
)
1246 (bfd
*, struct bfd_link_info
*);
1248 /* This function, if defined, prints a symbol to file and returns the
1249 name of the symbol to be printed. It should return NULL to fall
1250 back to default symbol printing. */
1251 const char *(*elf_backend_print_symbol_all
)
1252 (bfd
*, void *, asymbol
*);
1254 /* This function, if defined, is called after all local symbols and
1255 global symbols converted to locals are emitted into the symtab
1256 section. It allows the backend to emit special local symbols
1257 not handled in the hash table. */
1258 bfd_boolean (*elf_backend_output_arch_local_syms
)
1259 (bfd
*, struct bfd_link_info
*, void *,
1260 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym
*, asection
*,
1261 struct elf_link_hash_entry
*));
1263 /* This function, if defined, is called after all symbols are emitted
1264 into the symtab section. It allows the backend to emit special
1265 global symbols not handled in the hash table. */
1266 bfd_boolean (*elf_backend_output_arch_syms
)
1267 (bfd
*, struct bfd_link_info
*, void *,
1268 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym
*, asection
*,
1269 struct elf_link_hash_entry
*));
1271 /* Filter what symbols of the output file to include in the import
1272 library if one is created. */
1273 unsigned int (*elf_backend_filter_implib_symbols
)
1274 (bfd
*, struct bfd_link_info
*, asymbol
**, long);
1276 /* Copy any information related to dynamic linking from a pre-existing
1277 symbol to a newly created symbol. Also called to copy flags and
1278 other back-end info to a weakdef, in which case the symbol is not
1279 newly created and plt/got refcounts and dynamic indices should not
1281 void (*elf_backend_copy_indirect_symbol
)
1282 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
1283 struct elf_link_hash_entry
*);
1285 /* Modify any information related to dynamic linking such that the
1286 symbol is not exported. */
1287 void (*elf_backend_hide_symbol
)
1288 (struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd_boolean
);
1290 /* A function to do additional symbol fixup, called by
1291 _bfd_elf_fix_symbol_flags. */
1292 bfd_boolean (*elf_backend_fixup_symbol
)
1293 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
1295 /* Merge the backend specific symbol attribute. */
1296 void (*elf_backend_merge_symbol_attribute
)
1297 (struct elf_link_hash_entry
*, const Elf_Internal_Sym
*, bfd_boolean
,
1300 /* This function, if defined, will return a string containing the
1301 name of a target-specific dynamic tag. */
1302 char *(*elf_backend_get_target_dtag
)
1305 /* Decide whether an undefined symbol is special and can be ignored.
1306 This is the case for OPTIONAL symbols on IRIX. */
1307 bfd_boolean (*elf_backend_ignore_undef_symbol
)
1308 (struct elf_link_hash_entry
*);
1310 /* Emit relocations. Overrides default routine for emitting relocs,
1311 except during a relocatable link, or if all relocs are being emitted. */
1312 bfd_boolean (*elf_backend_emit_relocs
)
1313 (bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*,
1314 struct elf_link_hash_entry
**);
1316 /* Update relocations. It is allowed to change the number and the order.
1317 In such a case hashes should be invalidated. */
1318 void (*elf_backend_update_relocs
)
1319 (asection
*, struct bfd_elf_section_reloc_data
*);
1321 /* Count relocations. Not called for relocatable links
1322 or if all relocs are being preserved in the output. */
1323 unsigned int (*elf_backend_count_relocs
)
1324 (struct bfd_link_info
*, asection
*);
1326 /* Count additionals relocations. Called for relocatable links if
1327 additional relocations needs to be created. */
1328 unsigned int (*elf_backend_count_additional_relocs
)
1331 /* Say whether to sort relocs output by ld -r and ld --emit-relocs,
1332 by r_offset. If NULL, default to true. */
1333 bfd_boolean (*sort_relocs_p
)
1336 /* This function, if defined, is called when an NT_PRSTATUS note is found
1338 bfd_boolean (*elf_backend_grok_prstatus
)
1339 (bfd
*, Elf_Internal_Note
*);
1341 /* This function, if defined, is called when an NT_PSINFO or NT_PRPSINFO
1342 note is found in a core file. */
1343 bfd_boolean (*elf_backend_grok_psinfo
)
1344 (bfd
*, Elf_Internal_Note
*);
1346 /* This function, if defined, is called when a "FreeBSD" NT_PRSTATUS
1347 note is found in a core file. */
1348 bfd_boolean (*elf_backend_grok_freebsd_prstatus
)
1349 (bfd
*, Elf_Internal_Note
*);
1351 /* This function, if defined, is called to write a note to a corefile. */
1352 char *(*elf_backend_write_core_note
)
1353 (bfd
*abfd
, char *buf
, int *bufsiz
, int note_type
, ...);
1355 /* This function, if defined, is called to convert target-specific
1356 section flag names into hex values. */
1357 flagword (*elf_backend_lookup_section_flags_hook
)
1360 /* This function returns class of a reloc type. */
1361 enum elf_reloc_type_class (*elf_backend_reloc_type_class
)
1362 (const struct bfd_link_info
*, const asection
*, const Elf_Internal_Rela
*);
1364 /* This function, if defined, removes information about discarded functions
1365 from other sections which mention them. */
1366 bfd_boolean (*elf_backend_discard_info
)
1367 (bfd
*, struct elf_reloc_cookie
*, struct bfd_link_info
*);
1369 /* This function, if defined, signals that the function above has removed
1370 the discarded relocations for this section. */
1371 bfd_boolean (*elf_backend_ignore_discarded_relocs
)
1374 /* What to do when ld finds relocations against symbols defined in
1375 discarded sections. */
1376 unsigned int (*action_discarded
)
1379 /* This function returns the width of FDE pointers in bytes, or 0 if
1380 that can't be determined for some reason. The default definition
1381 goes by the bfd's EI_CLASS. */
1382 unsigned int (*elf_backend_eh_frame_address_size
)
1383 (bfd
*, const asection
*);
1385 /* These functions tell elf-eh-frame whether to attempt to turn
1386 absolute or lsda encodings into pc-relative ones. The default
1387 definition enables these transformations. */
1388 bfd_boolean (*elf_backend_can_make_relative_eh_frame
)
1389 (bfd
*, struct bfd_link_info
*, asection
*);
1390 bfd_boolean (*elf_backend_can_make_lsda_relative_eh_frame
)
1391 (bfd
*, struct bfd_link_info
*, asection
*);
1393 /* This function returns an encoding after computing the encoded
1394 value (and storing it in ENCODED) for the given OFFSET into OSEC,
1395 to be stored in at LOC_OFFSET into the LOC_SEC input section.
1396 The default definition chooses a 32-bit PC-relative encoding. */
1397 bfd_byte (*elf_backend_encode_eh_address
)
1398 (bfd
*abfd
, struct bfd_link_info
*info
,
1399 asection
*osec
, bfd_vma offset
,
1400 asection
*loc_sec
, bfd_vma loc_offset
,
1403 /* This function, if defined, may write out the given section.
1404 Returns TRUE if it did so and FALSE if the caller should. */
1405 bfd_boolean (*elf_backend_write_section
)
1406 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
1408 /* This function, if defined, returns TRUE if it is section symbols
1409 only that are considered local for the purpose of partitioning the
1410 symbol table into local and global symbols. This should be NULL
1411 for most targets, in which case the correct thing will be done.
1412 MIPS ELF, at least on the Irix 5, has special requirements. */
1413 bfd_boolean (*elf_backend_elfsym_local_is_section
)
1416 /* The level of IRIX compatibility we're striving for.
1417 MIPS ELF specific function. */
1418 irix_compat_t (*elf_backend_mips_irix_compat
)
1421 reloc_howto_type
*(*elf_backend_mips_rtype_to_howto
)
1422 (bfd
*, unsigned int, bfd_boolean
);
1424 /* The swapping table to use when dealing with ECOFF information.
1425 Used for the MIPS ELF .mdebug section. */
1426 const struct ecoff_debug_swap
*elf_backend_ecoff_debug_swap
;
1428 /* This function implements `bfd_elf_bfd_from_remote_memory';
1429 see elf.c, elfcode.h. */
1430 bfd
*(*elf_backend_bfd_from_remote_memory
)
1431 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
1432 int (*target_read_memory
) (bfd_vma vma
, bfd_byte
*myaddr
,
1433 bfd_size_type len
));
1435 bfd_boolean (*elf_backend_core_find_build_id
) (bfd
*, bfd_vma
);
1437 /* This function is used by `_bfd_elf_get_synthetic_symtab';
1439 bfd_vma (*plt_sym_val
) (bfd_vma
, const asection
*, const arelent
*);
1441 /* Is symbol defined in common section? */
1442 bfd_boolean (*common_definition
) (Elf_Internal_Sym
*);
1444 /* Return a common section index for section. */
1445 unsigned int (*common_section_index
) (asection
*);
1447 /* Return a common section for section. */
1448 asection
*(*common_section
) (asection
*);
1450 /* Return TRUE if we can merge 2 definitions. */
1451 bfd_boolean (*merge_symbol
) (struct elf_link_hash_entry
*,
1452 const Elf_Internal_Sym
*, asection
**,
1453 bfd_boolean
, bfd_boolean
,
1454 bfd
*, const asection
*);
1456 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
1457 bfd_boolean (*elf_hash_symbol
) (struct elf_link_hash_entry
*);
1459 /* If non-NULL, called to register the location of XLAT_LOC within
1460 .MIPS.xhash at which real final dynindx for H will be written.
1461 If XLAT_LOC is zero, the symbol is not included in
1462 .MIPS.xhash and no dynindx will be written. */
1463 void (*record_xhash_symbol
)
1464 (struct elf_link_hash_entry
*h
, bfd_vma xlat_loc
);
1466 /* Return TRUE if type is a function symbol type. */
1467 bfd_boolean (*is_function_type
) (unsigned int type
);
1469 /* If the ELF symbol SYM might be a function in SEC, return the
1470 function size and set *CODE_OFF to the function's entry point,
1471 otherwise return zero. */
1472 bfd_size_type (*maybe_function_sym
) (const asymbol
*sym
, asection
*sec
,
1475 /* Given NAME, the name of a relocation section stripped of its
1476 .rel/.rela prefix, return the section in ABFD to which the
1477 relocations apply. */
1478 asection
*(*get_reloc_section
) (bfd
*abfd
, const char *name
);
1480 /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
1481 has a type >= SHT_LOOS. Returns TRUE if the fields were initialised,
1482 FALSE otherwise. Can be called multiple times for a given section,
1483 until it returns TRUE. Most of the times it is called ISECTION will be
1484 set to an input section that might be associated with the output section.
1485 The last time that it is called, ISECTION will be set to NULL. */
1486 bfd_boolean (*elf_backend_copy_special_section_fields
)
1487 (const bfd
*ibfd
, bfd
*obfd
, const Elf_Internal_Shdr
*isection
,
1488 Elf_Internal_Shdr
*osection
);
1490 /* Used to handle bad SHF_LINK_ORDER input. */
1491 void (*link_order_error_handler
) (const char *, ...);
1493 /* Name of the PLT relocation section. */
1494 const char *relplt_name
;
1496 /* Alternate EM_xxxx machine codes for this backend. */
1497 int elf_machine_alt1
;
1498 int elf_machine_alt2
;
1500 const struct elf_size_info
*s
;
1502 /* An array of target specific special sections. */
1503 const struct bfd_elf_special_section
*special_sections
;
1505 /* The size in bytes of the header for the GOT. This includes the
1506 so-called reserved entries on some systems. */
1507 bfd_vma got_header_size
;
1509 /* The size of the GOT entry for the symbol pointed to by H if non-NULL,
1510 otherwise by the local symbol with index SYMNDX in IBFD. */
1511 bfd_vma (*got_elt_size
) (bfd
*, struct bfd_link_info
*,
1512 struct elf_link_hash_entry
*h
,
1513 bfd
*ibfd
, unsigned long symndx
);
1515 /* The vendor name to use for a processor-standard attributes section. */
1516 const char *obj_attrs_vendor
;
1518 /* The section name to use for a processor-standard attributes section. */
1519 const char *obj_attrs_section
;
1521 /* Return 1, 2 or 3 to indicate what type of arguments a
1522 processor-specific tag takes. */
1523 int (*obj_attrs_arg_type
) (int);
1525 /* The section type to use for an attributes section. */
1526 unsigned int obj_attrs_section_type
;
1528 /* This function determines the order in which any attributes are
1529 written. It must be defined for input in the range
1530 LEAST_KNOWN_OBJ_ATTRIBUTE..NUM_KNOWN_OBJ_ATTRIBUTES-1 (this range
1531 is used in order to make unity easy). The returned value is the
1532 actual tag number to place in the input position. */
1533 int (*obj_attrs_order
) (int);
1535 /* Handle merging unknown attributes; either warn and return TRUE,
1536 or give an error and return FALSE. */
1537 bfd_boolean (*obj_attrs_handle_unknown
) (bfd
*, int);
1539 /* Parse GNU properties. Return the property kind. If the property
1540 is corrupt, issue an error message and return property_corrupt. */
1541 enum elf_property_kind (*parse_gnu_properties
) (bfd
*, unsigned int,
1545 /* Merge GNU properties. Return TRUE if property is updated. */
1546 bfd_boolean (*merge_gnu_properties
) (struct bfd_link_info
*, bfd
*, bfd
*,
1547 elf_property
*, elf_property
*);
1549 /* Set up GNU properties. */
1550 bfd
*(*setup_gnu_properties
) (struct bfd_link_info
*);
1552 /* Fix up GNU properties. */
1553 void (*fixup_gnu_properties
) (struct bfd_link_info
*,
1554 elf_property_list
**);
1556 /* Encoding used for compact EH tables. */
1557 int (*compact_eh_encoding
) (struct bfd_link_info
*);
1559 /* Opcode representing no unwind. */
1560 int (*cant_unwind_opcode
) (struct bfd_link_info
*);
1562 /* Called when emitting an ELF symbol whoes input version had an
1563 ST_SHNDX field set to a value in the range SHN_LOPROC..SHN_HIOS.
1564 Returns the value to be installed in the ST_SHNDX field of the
1565 emitted symbol. If not defined, the value is left unchanged. */
1566 unsigned int (*symbol_section_index
) (bfd
*, elf_symbol_type
*);
1568 /* Called when a section has extra reloc sections. */
1569 bfd_boolean (*init_secondary_reloc_section
) (bfd
*, Elf_Internal_Shdr
*,
1570 const char *, unsigned int);
1572 /* Called when after loading the normal relocs for a section. */
1573 bfd_boolean (*slurp_secondary_relocs
) (bfd
*, asection
*, asymbol
**);
1575 /* Called after writing the normal relocs for a section. */
1576 bfd_boolean (*write_secondary_relocs
) (bfd
*, asection
*);
1578 /* This is non-zero if static TLS segments require a special alignment. */
1579 unsigned static_tls_alignment
;
1581 /* Alignment for the PT_GNU_STACK segment. */
1582 unsigned stack_align
;
1584 /* Flag bits to assign to a section of type SHT_STRTAB. */
1585 unsigned long elf_strtab_flags
;
1587 /* This is TRUE if the linker should act like collect and gather
1588 global constructors and destructors by name. This is TRUE for
1589 MIPS ELF because the Irix 5 tools can not handle the .init
1591 unsigned collect
: 1;
1593 /* This is TRUE if the linker should ignore changes to the type of a
1594 symbol. This is TRUE for MIPS ELF because some Irix 5 objects
1595 record undefined functions as STT_OBJECT although the definitions
1597 unsigned type_change_ok
: 1;
1599 /* Whether the backend may use REL relocations. (Some backends use
1600 both REL and RELA relocations, and this flag is set for those
1602 unsigned may_use_rel_p
: 1;
1604 /* Whether the backend may use RELA relocations. (Some backends use
1605 both REL and RELA relocations, and this flag is set for those
1607 unsigned may_use_rela_p
: 1;
1609 /* Whether the default relocation type is RELA. If a backend with
1610 this flag set wants REL relocations for a particular section,
1611 it must note that explicitly. Similarly, if this flag is clear,
1612 and the backend wants RELA relocations for a particular
1614 unsigned default_use_rela_p
: 1;
1616 /* True if PLT and copy relocations should be RELA by default. */
1617 unsigned rela_plts_and_copies_p
: 1;
1619 /* Set if RELA relocations for a relocatable link can be handled by
1620 generic code. Backends that set this flag need do nothing in the
1621 backend relocate_section routine for relocatable linking. */
1622 unsigned rela_normal
: 1;
1624 /* Set if DT_REL/DT_RELA/DT_RELSZ/DT_RELASZ should not include PLT
1626 unsigned dtrel_excludes_plt
: 1;
1628 /* TRUE if addresses "naturally" sign extend. This is used when
1629 swapping in from Elf32 when BFD64. */
1630 unsigned sign_extend_vma
: 1;
1632 unsigned want_got_plt
: 1;
1633 unsigned plt_readonly
: 1;
1634 unsigned want_plt_sym
: 1;
1635 unsigned plt_not_loaded
: 1;
1636 unsigned plt_alignment
: 4;
1637 unsigned can_gc_sections
: 1;
1638 unsigned can_refcount
: 1;
1639 unsigned want_got_sym
: 1;
1640 unsigned want_dynbss
: 1;
1641 unsigned want_dynrelro
: 1;
1643 /* Targets which do not support physical addressing often require
1644 that the p_paddr field in the section header to be set to zero.
1645 This field indicates whether this behavior is required. */
1646 unsigned want_p_paddr_set_to_zero
: 1;
1648 /* Target has broken hardware and/or kernel that requires pages not
1649 to be mapped twice with different permissions. */
1650 unsigned no_page_alias
: 1;
1652 /* True if an object file lacking a .note.GNU-stack section
1653 should be assumed to be requesting exec stack. At least one
1654 other file in the link needs to have a .note.GNU-stack section
1655 for a PT_GNU_STACK segment to be created. */
1656 unsigned default_execstack
: 1;
1658 /* True if elf_section_data(sec)->this_hdr.contents is sec->rawsize
1659 in length rather than sec->size in length, if sec->rawsize is
1660 non-zero and smaller than sec->size. */
1661 unsigned caches_rawsize
: 1;
1663 /* Address of protected data defined in the shared library may be
1664 external, i.e., due to copy relocation. */
1665 unsigned extern_protected_data
: 1;
1667 /* True if `_bfd_elf_link_renumber_dynsyms' must be called even for
1669 unsigned always_renumber_dynsyms
: 1;
1671 /* True if the 32-bit Linux PRPSINFO structure's `pr_uid' and `pr_gid'
1672 members use a 16-bit data type. */
1673 unsigned linux_prpsinfo32_ugid16
: 1;
1675 /* True if the 64-bit Linux PRPSINFO structure's `pr_uid' and `pr_gid'
1676 members use a 16-bit data type. */
1677 unsigned linux_prpsinfo64_ugid16
: 1;
1680 /* Information about reloc sections associated with a bfd_elf_section_data
1682 struct bfd_elf_section_reloc_data
1684 /* The ELF header for the reloc section associated with this
1686 Elf_Internal_Shdr
*hdr
;
1687 /* The number of relocations currently assigned to HDR. */
1689 /* The ELF section number of the reloc section. Only used for an
1692 /* Used by the backend linker to store the symbol hash table entries
1693 associated with relocs against global symbols. */
1694 struct elf_link_hash_entry
**hashes
;
1697 /* Information stored for each BFD section in an ELF file. This
1698 structure is allocated by elf_new_section_hook. */
1700 struct bfd_elf_section_data
1702 /* The ELF header for this section. */
1703 Elf_Internal_Shdr this_hdr
;
1705 /* INPUT_SECTION_FLAGS if specified in the linker script. */
1706 struct flag_info
*section_flag_info
;
1708 /* Information about the REL and RELA reloc sections associated
1709 with this section, if any. */
1710 struct bfd_elf_section_reloc_data rel
, rela
;
1712 /* The ELF section number of this section. */
1715 /* Used by the backend linker when generating a shared library to
1716 record the dynamic symbol index for a section symbol
1717 corresponding to this section. A value of 0 means that there is
1718 no dynamic symbol for this section. */
1721 /* A pointer to the linked-to section for SHF_LINK_ORDER. */
1722 asection
*linked_to
;
1724 /* A pointer to the swapped relocs. If the section uses REL relocs,
1725 rather than RELA, all the r_addend fields will be zero. This
1726 pointer may be NULL. It is used by the backend linker. */
1727 Elf_Internal_Rela
*relocs
;
1729 /* A pointer to a linked list tracking dynamic relocs copied for
1733 /* A pointer to the bfd section used for dynamic relocs. */
1737 /* Group name, if this section is a member of a group. */
1740 /* Group signature sym, if this is the SHT_GROUP section. */
1741 struct bfd_symbol
*id
;
1744 /* For a member of a group, points to the SHT_GROUP section.
1745 NULL for the SHT_GROUP section itself and non-group sections. */
1746 asection
*sec_group
;
1748 /* A linked list of member sections in the group. Circular when used by
1749 the linker. For the SHT_GROUP section, points at first member. */
1750 asection
*next_in_group
;
1752 /* The FDEs associated with this section. The u.fde.next_in_section
1753 field acts as a chain pointer. */
1754 struct eh_cie_fde
*fde_list
;
1756 /* Link from a text section to its .eh_frame_entry section. */
1757 asection
*eh_frame_entry
;
1759 /* A pointer used for various section optimizations. */
1763 #define elf_section_data(sec) ((struct bfd_elf_section_data*)(sec)->used_by_bfd)
1764 #define elf_linked_to_section(sec) (elf_section_data(sec)->linked_to)
1765 #define elf_section_type(sec) (elf_section_data(sec)->this_hdr.sh_type)
1766 #define elf_section_flags(sec) (elf_section_data(sec)->this_hdr.sh_flags)
1767 #define elf_section_info(sec) (elf_section_data(sec)->this_hdr.sh_info)
1768 #define elf_group_name(sec) (elf_section_data(sec)->group.name)
1769 #define elf_group_id(sec) (elf_section_data(sec)->group.id)
1770 #define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group)
1771 #define elf_fde_list(sec) (elf_section_data(sec)->fde_list)
1772 #define elf_sec_group(sec) (elf_section_data(sec)->sec_group)
1773 #define elf_section_eh_frame_entry(sec) (elf_section_data(sec)->eh_frame_entry)
1775 #define xvec_get_elf_backend_data(xvec) \
1776 ((const struct elf_backend_data *) (xvec)->backend_data)
1778 #define get_elf_backend_data(abfd) \
1779 xvec_get_elf_backend_data ((abfd)->xvec)
1781 /* The least object attributes (within an attributes subsection) known
1782 for any target. Some code assumes that the value 0 is not used and
1783 the field for that attribute can instead be used as a marker to
1784 indicate that attributes have been initialized. */
1785 #define LEAST_KNOWN_OBJ_ATTRIBUTE 2
1787 /* The maximum number of known object attributes for any target. */
1788 #define NUM_KNOWN_OBJ_ATTRIBUTES 71
1790 /* The value of an object attribute. The type indicates whether the attribute
1791 holds and integer, a string, or both. It can also indicate that there can
1792 be no default (i.e. all values must be written to file, even zero), or
1793 that the value is in error and should not be written to file. */
1795 typedef struct obj_attribute
1797 #define ATTR_TYPE_FLAG_INT_VAL (1 << 0)
1798 #define ATTR_TYPE_FLAG_STR_VAL (1 << 1)
1799 #define ATTR_TYPE_FLAG_NO_DEFAULT (1 << 2)
1800 #define ATTR_TYPE_FLAG_ERROR (1 << 3)
1802 #define ATTR_TYPE_HAS_INT_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_INT_VAL)
1803 #define ATTR_TYPE_HAS_STR_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_STR_VAL)
1804 #define ATTR_TYPE_HAS_NO_DEFAULT(TYPE) ((TYPE) & ATTR_TYPE_FLAG_NO_DEFAULT)
1805 #define ATTR_TYPE_HAS_ERROR(TYPE) ((TYPE) & ATTR_TYPE_FLAG_ERROR)
1812 typedef struct obj_attribute_list
1814 struct obj_attribute_list
*next
;
1817 } obj_attribute_list
;
1819 /* Object attributes may either be defined by the processor ABI, index
1820 OBJ_ATTR_PROC in the *_obj_attributes arrays, or be GNU-specific
1821 (and possibly also processor-specific), index OBJ_ATTR_GNU. */
1822 #define OBJ_ATTR_PROC 0
1823 #define OBJ_ATTR_GNU 1
1824 #define OBJ_ATTR_FIRST OBJ_ATTR_PROC
1825 #define OBJ_ATTR_LAST OBJ_ATTR_GNU
1827 /* The following object attribute tags are taken as generic, for all
1828 targets and for "gnu" where there is no target standard. */
1835 Tag_compatibility
= 32
1838 /* The following struct stores information about every SystemTap section
1839 found in the object file. */
1842 struct sdt_note
*next
;
1847 /* tdata information grabbed from an elf core file. */
1848 struct core_elf_obj_tdata
1857 /* Extra tdata information held for output ELF BFDs. */
1858 struct output_elf_obj_tdata
1860 struct elf_segment_map
*seg_map
;
1861 struct elf_strtab_hash
*strtab_ptr
;
1863 /* STT_SECTION symbols for each section */
1864 asymbol
**section_syms
;
1866 /* Used to determine if PT_GNU_EH_FRAME segment header should be
1868 asection
*eh_frame_hdr
;
1870 /* NT_GNU_BUILD_ID note type info. */
1873 bfd_boolean (*after_write_object_contents
) (bfd
*);
1878 /* Records the result of `get_program_header_size'. */
1879 bfd_size_type program_header_size
;
1881 /* Used when laying out sections. */
1882 file_ptr next_file_pos
;
1884 int num_section_syms
;
1885 unsigned int shstrtab_section
, strtab_section
;
1887 /* Segment flags for the PT_GNU_STACK segment. */
1888 unsigned int stack_flags
;
1890 /* Used to determine if the e_flags field has been initialized */
1891 bfd_boolean flags_init
;
1894 /* Indicate if the bfd contains SHF_GNU_MBIND sections or symbols that
1895 have the STT_GNU_IFUNC symbol type or STB_GNU_UNIQUE binding. Used
1896 to set the osabi field in the ELF header structure. */
1899 elf_gnu_osabi_mbind
= 1 << 0,
1900 elf_gnu_osabi_ifunc
= 1 << 1,
1901 elf_gnu_osabi_unique
= 1 << 2,
1904 typedef struct elf_section_list
1906 Elf_Internal_Shdr hdr
;
1908 struct elf_section_list
* next
;
1911 enum dynamic_lib_link_class
{
1915 DYN_NO_ADD_NEEDED
= 4,
1919 /* Some private data is stashed away for future use using the tdata pointer
1920 in the bfd structure. */
1922 struct elf_obj_tdata
1924 Elf_Internal_Ehdr elf_header
[1]; /* Actual data, but ref like ptr */
1925 Elf_Internal_Shdr
**elf_sect_ptr
;
1926 Elf_Internal_Phdr
*phdr
;
1927 Elf_Internal_Shdr symtab_hdr
;
1928 Elf_Internal_Shdr shstrtab_hdr
;
1929 Elf_Internal_Shdr strtab_hdr
;
1930 Elf_Internal_Shdr dynsymtab_hdr
;
1931 Elf_Internal_Shdr dynstrtab_hdr
;
1932 Elf_Internal_Shdr dynversym_hdr
;
1933 Elf_Internal_Shdr dynverref_hdr
;
1934 Elf_Internal_Shdr dynverdef_hdr
;
1935 elf_section_list
* symtab_shndx_list
;
1936 bfd_vma gp
; /* The gp value */
1937 unsigned int gp_size
; /* The gp size */
1938 unsigned int num_elf_sections
; /* elf_sect_ptr size */
1940 /* A mapping from external symbols to entries in the linker hash
1941 table, used when linking. This is indexed by the symbol index
1942 minus the sh_info field of the symbol table header. */
1943 struct elf_link_hash_entry
**sym_hashes
;
1945 /* Track usage and final offsets of GOT entries for local symbols.
1946 This array is indexed by symbol index. Elements are used
1947 identically to "got" in struct elf_link_hash_entry. */
1950 bfd_signed_vma
*refcounts
;
1952 struct got_entry
**ents
;
1955 /* The linker ELF emulation code needs to let the backend ELF linker
1956 know what filename should be used for a dynamic object if the
1957 dynamic object is found using a search. The emulation code then
1958 sometimes needs to know what name was actually used. Until the
1959 file has been added to the linker symbol table, this field holds
1960 the name the linker wants. After it has been added, it holds the
1961 name actually used, which will be the DT_SONAME entry if there is
1963 const char *dt_name
;
1965 /* The linker emulation needs to know what audit libs
1966 are used by a dynamic object. */
1967 const char *dt_audit
;
1969 /* Used by find_nearest_line entry point. */
1972 /* A place to stash dwarf1 info for this bfd. */
1973 struct dwarf1_debug
*dwarf1_find_line_info
;
1975 /* A place to stash dwarf2 info for this bfd. */
1976 void *dwarf2_find_line_info
;
1978 /* Stash away info for yet another find line/function variant. */
1979 void *elf_find_function_cache
;
1981 /* Number of symbol version definitions we are about to emit. */
1982 unsigned int cverdefs
;
1984 /* Number of symbol version references we are about to emit. */
1985 unsigned int cverrefs
;
1987 /* Symbol version definitions in external objects. */
1988 Elf_Internal_Verdef
*verdef
;
1990 /* Symbol version references to external objects. */
1991 Elf_Internal_Verneed
*verref
;
1993 /* A pointer to the .eh_frame section. */
1994 asection
*eh_frame_section
;
1996 /* Symbol buffer. */
1999 /* List of GNU properties. Will be updated by setup_gnu_properties
2000 after all input GNU properties are merged for output. */
2001 elf_property_list
*properties
;
2003 obj_attribute known_obj_attributes
[2][NUM_KNOWN_OBJ_ATTRIBUTES
];
2004 obj_attribute_list
*other_obj_attributes
[2];
2006 /* Linked-list containing information about every Systemtap section
2007 found in the object file. Each section corresponds to one entry
2009 struct sdt_note
*sdt_note_head
;
2011 Elf_Internal_Shdr
**group_sect_ptr
;
2012 unsigned int num_group
;
2014 /* Index into group_sect_ptr, updated by setup_group when finding a
2015 section's group. Used to optimize subsequent group searches. */
2016 unsigned int group_search_offset
;
2018 unsigned int symtab_section
, dynsymtab_section
;
2019 unsigned int dynversym_section
, dynverdef_section
, dynverref_section
;
2021 /* An identifier used to distinguish different target
2022 specific extensions to this structure. */
2023 ENUM_BITFIELD (elf_target_id
) object_id
: 6;
2025 /* Whether a dyanmic object was specified normally on the linker
2026 command line, or was specified when --as-needed was in effect,
2027 or was found via a DT_NEEDED entry. */
2028 ENUM_BITFIELD (dynamic_lib_link_class
) dyn_lib_class
: 4;
2030 /* Whether the bfd uses OS specific bits that require ELFOSABI_GNU. */
2031 ENUM_BITFIELD (elf_gnu_osabi
) has_gnu_osabi
: 3;
2033 /* Whether if the bfd contains the GNU_PROPERTY_NO_COPY_ON_PROTECTED
2035 unsigned int has_no_copy_on_protected
: 1;
2037 /* Irix 5 often screws up the symbol table, sorting local symbols
2038 after global symbols. This flag is set if the symbol table in
2039 this BFD appears to be screwed up. If it is, we ignore the
2040 sh_info field in the symbol table header, and always read all the
2042 unsigned int bad_symtab
: 1;
2044 /* Information grabbed from an elf core file. */
2045 struct core_elf_obj_tdata
*core
;
2047 /* More information held for output ELF BFDs. */
2048 struct output_elf_obj_tdata
*o
;
2051 #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
2053 #define elf_object_id(bfd) (elf_tdata(bfd) -> object_id)
2054 #define elf_program_header_size(bfd) (elf_tdata(bfd) -> o->program_header_size)
2055 #define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header)
2056 #define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr)
2057 #define elf_numsections(bfd) (elf_tdata(bfd) -> num_elf_sections)
2058 #define elf_seg_map(bfd) (elf_tdata(bfd) -> o->seg_map)
2059 #define elf_next_file_pos(bfd) (elf_tdata(bfd) -> o->next_file_pos)
2060 #define elf_eh_frame_hdr(bfd) (elf_tdata(bfd) -> o->eh_frame_hdr)
2061 #define elf_stack_flags(bfd) (elf_tdata(bfd) -> o->stack_flags)
2062 #define elf_shstrtab(bfd) (elf_tdata(bfd) -> o->strtab_ptr)
2063 #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section)
2064 #define elf_symtab_shndx_list(bfd) (elf_tdata(bfd) -> symtab_shndx_list)
2065 #define elf_strtab_sec(bfd) (elf_tdata(bfd) -> o->strtab_section)
2066 #define elf_shstrtab_sec(bfd) (elf_tdata(bfd) -> o->shstrtab_section)
2067 #define elf_symtab_hdr(bfd) (elf_tdata(bfd) -> symtab_hdr)
2068 #define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section)
2069 #define elf_dynversym(bfd) (elf_tdata(bfd) -> dynversym_section)
2070 #define elf_dynverdef(bfd) (elf_tdata(bfd) -> dynverdef_section)
2071 #define elf_dynverref(bfd) (elf_tdata(bfd) -> dynverref_section)
2072 #define elf_eh_frame_section(bfd) \
2073 (elf_tdata(bfd) -> eh_frame_section)
2074 #define elf_section_syms(bfd) (elf_tdata(bfd) -> o->section_syms)
2075 #define elf_num_section_syms(bfd) (elf_tdata(bfd) -> o->num_section_syms)
2076 #define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
2077 #define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
2078 #define elf_gp(bfd) (elf_tdata(bfd) -> gp)
2079 #define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size)
2080 #define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes)
2081 #define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts)
2082 #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets)
2083 #define elf_local_got_ents(bfd) (elf_tdata(bfd) -> local_got.ents)
2084 #define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name)
2085 #define elf_dt_audit(bfd) (elf_tdata(bfd) -> dt_audit)
2086 #define elf_dyn_lib_class(bfd) (elf_tdata(bfd) -> dyn_lib_class)
2087 #define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab)
2088 #define elf_flags_init(bfd) (elf_tdata(bfd) -> o->flags_init)
2089 #define elf_known_obj_attributes(bfd) (elf_tdata (bfd) -> known_obj_attributes)
2090 #define elf_other_obj_attributes(bfd) (elf_tdata (bfd) -> other_obj_attributes)
2091 #define elf_known_obj_attributes_proc(bfd) \
2092 (elf_known_obj_attributes (bfd) [OBJ_ATTR_PROC])
2093 #define elf_other_obj_attributes_proc(bfd) \
2094 (elf_other_obj_attributes (bfd) [OBJ_ATTR_PROC])
2095 #define elf_properties(bfd) (elf_tdata (bfd) -> properties)
2096 #define elf_has_no_copy_on_protected(bfd) \
2097 (elf_tdata(bfd) -> has_no_copy_on_protected)
2099 extern void _bfd_elf_swap_verdef_in
2100 (bfd
*, const Elf_External_Verdef
*, Elf_Internal_Verdef
*);
2101 extern void _bfd_elf_swap_verdef_out
2102 (bfd
*, const Elf_Internal_Verdef
*, Elf_External_Verdef
*);
2103 extern void _bfd_elf_swap_verdaux_in
2104 (bfd
*, const Elf_External_Verdaux
*, Elf_Internal_Verdaux
*);
2105 extern void _bfd_elf_swap_verdaux_out
2106 (bfd
*, const Elf_Internal_Verdaux
*, Elf_External_Verdaux
*);
2107 extern void _bfd_elf_swap_verneed_in
2108 (bfd
*, const Elf_External_Verneed
*, Elf_Internal_Verneed
*);
2109 extern void _bfd_elf_swap_verneed_out
2110 (bfd
*, const Elf_Internal_Verneed
*, Elf_External_Verneed
*);
2111 extern void _bfd_elf_swap_vernaux_in
2112 (bfd
*, const Elf_External_Vernaux
*, Elf_Internal_Vernaux
*);
2113 extern void _bfd_elf_swap_vernaux_out
2114 (bfd
*, const Elf_Internal_Vernaux
*, Elf_External_Vernaux
*);
2115 extern void _bfd_elf_swap_versym_in
2116 (bfd
*, const Elf_External_Versym
*, Elf_Internal_Versym
*);
2117 extern void _bfd_elf_swap_versym_out
2118 (bfd
*, const Elf_Internal_Versym
*, Elf_External_Versym
*);
2120 extern unsigned int _bfd_elf_section_from_bfd_section
2121 (bfd
*, asection
*);
2122 extern char *bfd_elf_string_from_elf_section
2123 (bfd
*, unsigned, unsigned);
2124 extern Elf_Internal_Sym
*bfd_elf_get_elf_syms
2125 (bfd
*, Elf_Internal_Shdr
*, size_t, size_t, Elf_Internal_Sym
*, void *,
2126 Elf_External_Sym_Shndx
*);
2127 extern char * bfd_elf_get_str_section (bfd
*, unsigned int);
2128 extern const char *bfd_elf_sym_name
2129 (bfd
*, Elf_Internal_Shdr
*, Elf_Internal_Sym
*, asection
*);
2131 extern bfd_boolean _bfd_elf_copy_private_bfd_data
2133 extern bfd_boolean _bfd_elf_print_private_bfd_data
2135 const char * _bfd_elf_get_symbol_version_string
2136 (bfd
*, asymbol
*, bfd_boolean
, bfd_boolean
*);
2137 extern void bfd_elf_print_symbol
2138 (bfd
*, void *, asymbol
*, bfd_print_symbol_type
);
2140 extern unsigned int _bfd_elf_eh_frame_address_size
2141 (bfd
*, const asection
*);
2142 extern bfd_byte _bfd_elf_encode_eh_address
2143 (bfd
*abfd
, struct bfd_link_info
*info
, asection
*osec
, bfd_vma offset
,
2144 asection
*loc_sec
, bfd_vma loc_offset
, bfd_vma
*encoded
);
2145 extern bfd_boolean _bfd_elf_can_make_relative
2146 (bfd
*input_bfd
, struct bfd_link_info
*info
, asection
*eh_frame_section
);
2148 extern enum elf_reloc_type_class _bfd_elf_reloc_type_class
2149 (const struct bfd_link_info
*, const asection
*,
2150 const Elf_Internal_Rela
*);
2151 extern bfd_vma _bfd_elf_rela_local_sym
2152 (bfd
*, Elf_Internal_Sym
*, asection
**, Elf_Internal_Rela
*);
2153 extern bfd_vma _bfd_elf_rel_local_sym
2154 (bfd
*, Elf_Internal_Sym
*, asection
**, bfd_vma
);
2155 extern bfd_vma _bfd_elf_section_offset
2156 (bfd
*, struct bfd_link_info
*, asection
*, bfd_vma
);
2158 extern unsigned long bfd_elf_hash
2160 extern unsigned long bfd_elf_gnu_hash
2163 extern bfd_reloc_status_type bfd_elf_generic_reloc
2164 (bfd
*, arelent
*, asymbol
*, void *, asection
*, bfd
*, char **);
2165 extern bfd_boolean bfd_elf_allocate_object
2166 (bfd
*, size_t, enum elf_target_id
);
2167 extern bfd_boolean bfd_elf_make_object
2169 extern bfd_boolean bfd_elf_mkcorefile
2171 extern bfd_boolean _bfd_elf_make_section_from_shdr
2172 (bfd
*, Elf_Internal_Shdr
*, const char *, int);
2173 extern bfd_boolean _bfd_elf_make_section_from_phdr
2174 (bfd
*, Elf_Internal_Phdr
*, int, const char *);
2175 extern struct bfd_hash_entry
*_bfd_elf_link_hash_newfunc
2176 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *);
2177 extern struct bfd_link_hash_table
*_bfd_elf_link_hash_table_create
2179 extern void _bfd_elf_link_hash_table_free
2181 extern void _bfd_elf_link_hash_copy_indirect
2182 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
2183 struct elf_link_hash_entry
*);
2184 extern void _bfd_elf_link_hash_hide_symbol
2185 (struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd_boolean
);
2186 extern void _bfd_elf_link_hide_symbol
2187 (bfd
*, struct bfd_link_info
*, struct bfd_link_hash_entry
*);
2188 extern bfd_boolean _bfd_elf_link_hash_fixup_symbol
2189 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
2190 extern bfd_boolean _bfd_elf_link_hash_table_init
2191 (struct elf_link_hash_table
*, bfd
*,
2192 struct bfd_hash_entry
*(*)
2193 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *),
2194 unsigned int, enum elf_target_id
);
2195 extern bfd_boolean _bfd_elf_slurp_version_tables
2196 (bfd
*, bfd_boolean
);
2197 extern bfd_boolean _bfd_elf_merge_sections
2198 (bfd
*, struct bfd_link_info
*);
2199 extern bfd_boolean _bfd_elf_match_sections_by_type
2200 (bfd
*, const asection
*, bfd
*, const asection
*);
2201 extern bfd_boolean bfd_elf_is_group_section
2202 (bfd
*, const struct bfd_section
*);
2203 extern const char *bfd_elf_group_name
2204 (bfd
*, const struct bfd_section
*);
2205 extern bfd_boolean _bfd_elf_section_already_linked
2206 (bfd
*, asection
*, struct bfd_link_info
*);
2207 extern void bfd_elf_set_group_contents
2208 (bfd
*, asection
*, void *);
2209 extern unsigned int _bfd_elf_filter_global_symbols
2210 (bfd
*, struct bfd_link_info
*, asymbol
**, long);
2211 extern asection
*_bfd_elf_check_kept_section
2212 (asection
*, struct bfd_link_info
*);
2213 #define _bfd_elf_link_just_syms _bfd_generic_link_just_syms
2214 extern void _bfd_elf_copy_link_hash_symbol_type
2215 (bfd
*, struct bfd_link_hash_entry
*, struct bfd_link_hash_entry
*);
2216 extern bfd_boolean _bfd_elf_size_group_sections
2217 (struct bfd_link_info
*);
2218 extern bfd_boolean _bfd_elf_fixup_group_sections
2219 (bfd
*, asection
*);
2220 extern bfd_boolean _bfd_elf_copy_private_header_data
2222 extern bfd_boolean _bfd_elf_copy_private_symbol_data
2223 (bfd
*, asymbol
*, bfd
*, asymbol
*);
2224 #define _bfd_generic_init_private_section_data \
2225 _bfd_elf_init_private_section_data
2226 extern bfd_boolean _bfd_elf_init_private_section_data
2227 (bfd
*, asection
*, bfd
*, asection
*, struct bfd_link_info
*);
2228 extern bfd_boolean _bfd_elf_copy_private_section_data
2229 (bfd
*, asection
*, bfd
*, asection
*);
2230 extern bfd_boolean _bfd_elf_write_object_contents
2232 extern bfd_boolean _bfd_elf_write_corefile_contents
2234 extern bfd_boolean _bfd_elf_set_section_contents
2235 (bfd
*, sec_ptr
, const void *, file_ptr
, bfd_size_type
);
2236 extern long _bfd_elf_get_symtab_upper_bound
2238 extern long _bfd_elf_canonicalize_symtab
2239 (bfd
*, asymbol
**);
2240 extern long _bfd_elf_get_dynamic_symtab_upper_bound
2242 extern long _bfd_elf_canonicalize_dynamic_symtab
2243 (bfd
*, asymbol
**);
2244 extern long _bfd_elf_get_synthetic_symtab
2245 (bfd
*, long, asymbol
**, long, asymbol
**, asymbol
**);
2246 extern long _bfd_elf_get_reloc_upper_bound
2248 extern long _bfd_elf_canonicalize_reloc
2249 (bfd
*, sec_ptr
, arelent
**, asymbol
**);
2250 extern asection
* _bfd_elf_get_dynamic_reloc_section
2251 (bfd
*, asection
*, bfd_boolean
);
2252 extern asection
* _bfd_elf_make_dynamic_reloc_section
2253 (asection
*, bfd
*, unsigned int, bfd
*, bfd_boolean
);
2254 extern long _bfd_elf_get_dynamic_reloc_upper_bound
2256 extern long _bfd_elf_canonicalize_dynamic_reloc
2257 (bfd
*, arelent
**, asymbol
**);
2258 extern asymbol
*_bfd_elf_make_empty_symbol
2260 extern void _bfd_elf_get_symbol_info
2261 (bfd
*, asymbol
*, symbol_info
*);
2262 extern bfd_boolean _bfd_elf_is_local_label_name
2263 (bfd
*, const char *);
2264 extern alent
*_bfd_elf_get_lineno
2266 extern bfd_boolean _bfd_elf_set_arch_mach
2267 (bfd
*, enum bfd_architecture
, unsigned long);
2268 extern bfd_boolean _bfd_elf_find_nearest_line
2269 (bfd
*, asymbol
**, asection
*, bfd_vma
,
2270 const char **, const char **, unsigned int *, unsigned int *);
2271 extern bfd_boolean _bfd_elf_find_line
2272 (bfd
*, asymbol
**, asymbol
*, const char **, unsigned int *);
2273 extern bfd_boolean _bfd_elf_find_inliner_info
2274 (bfd
*, const char **, const char **, unsigned int *);
2275 extern asymbol
*_bfd_elf_find_function
2276 (bfd
*, asymbol
**, asection
*, bfd_vma
, const char **, const char **);
2277 #define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols
2278 #define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
2279 extern int _bfd_elf_sizeof_headers
2280 (bfd
*, struct bfd_link_info
*);
2281 extern bfd_boolean _bfd_elf_new_section_hook
2282 (bfd
*, asection
*);
2283 extern const struct bfd_elf_special_section
*_bfd_elf_get_special_section
2284 (const char *, const struct bfd_elf_special_section
*, unsigned int);
2285 extern const struct bfd_elf_special_section
*_bfd_elf_get_sec_type_attr
2286 (bfd
*, asection
*);
2288 extern bfd_boolean _bfd_elf_link_hide_sym_by_version
2289 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
2291 /* If the target doesn't have reloc handling written yet: */
2292 extern bfd_boolean _bfd_elf_no_info_to_howto
2293 (bfd
*, arelent
*, Elf_Internal_Rela
*);
2295 extern bfd_boolean bfd_section_from_shdr
2296 (bfd
*, unsigned int shindex
);
2297 extern bfd_boolean bfd_section_from_phdr
2298 (bfd
*, Elf_Internal_Phdr
*, int);
2300 extern int _bfd_elf_symbol_from_bfd_symbol
2301 (bfd
*, asymbol
**);
2303 extern Elf_Internal_Sym
*bfd_sym_from_r_symndx
2304 (struct sym_cache
*, bfd
*, unsigned long);
2305 extern asection
*bfd_section_from_elf_index
2306 (bfd
*, unsigned int);
2308 extern struct elf_strtab_hash
* _bfd_elf_strtab_init
2310 extern void _bfd_elf_strtab_free
2311 (struct elf_strtab_hash
*);
2312 extern size_t _bfd_elf_strtab_add
2313 (struct elf_strtab_hash
*, const char *, bfd_boolean
);
2314 extern void _bfd_elf_strtab_addref
2315 (struct elf_strtab_hash
*, size_t);
2316 extern void _bfd_elf_strtab_delref
2317 (struct elf_strtab_hash
*, size_t);
2318 extern unsigned int _bfd_elf_strtab_refcount
2319 (struct elf_strtab_hash
*, size_t);
2320 extern void _bfd_elf_strtab_clear_all_refs
2321 (struct elf_strtab_hash
*);
2322 extern void *_bfd_elf_strtab_save
2323 (struct elf_strtab_hash
*);
2324 extern void _bfd_elf_strtab_restore
2325 (struct elf_strtab_hash
*, void *);
2326 extern bfd_size_type _bfd_elf_strtab_size
2327 (struct elf_strtab_hash
*);
2328 extern bfd_size_type _bfd_elf_strtab_len
2329 (struct elf_strtab_hash
*);
2330 extern bfd_size_type _bfd_elf_strtab_offset
2331 (struct elf_strtab_hash
*, size_t);
2332 extern const char * _bfd_elf_strtab_str
2333 (struct elf_strtab_hash
*, size_t idx
, bfd_size_type
*offset
);
2334 extern bfd_boolean _bfd_elf_strtab_emit
2335 (bfd
*, struct elf_strtab_hash
*);
2336 extern void _bfd_elf_strtab_finalize
2337 (struct elf_strtab_hash
*);
2339 extern bfd_boolean bfd_elf_parse_eh_frame_entries
2340 (bfd
*, struct bfd_link_info
*);
2341 extern bfd_boolean _bfd_elf_parse_eh_frame_entry
2342 (struct bfd_link_info
*, asection
*, struct elf_reloc_cookie
*);
2343 extern void _bfd_elf_parse_eh_frame
2344 (bfd
*, struct bfd_link_info
*, asection
*, struct elf_reloc_cookie
*);
2345 extern bfd_boolean _bfd_elf_end_eh_frame_parsing
2346 (struct bfd_link_info
*info
);
2348 extern bfd_boolean _bfd_elf_discard_section_eh_frame
2349 (bfd
*, struct bfd_link_info
*, asection
*,
2350 bfd_boolean (*) (bfd_vma
, void *), struct elf_reloc_cookie
*);
2351 extern bfd_boolean _bfd_elf_adjust_eh_frame_global_symbol
2352 (struct elf_link_hash_entry
*, void *);
2353 extern bfd_boolean _bfd_elf_discard_section_eh_frame_hdr
2354 (bfd
*, struct bfd_link_info
*);
2355 extern bfd_vma _bfd_elf_eh_frame_section_offset
2356 (bfd
*, struct bfd_link_info
*, asection
*, bfd_vma
);
2357 extern bfd_boolean _bfd_elf_write_section_eh_frame
2358 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
2359 bfd_boolean _bfd_elf_write_section_eh_frame_entry
2360 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
2361 extern bfd_boolean
_bfd_elf_fixup_eh_frame_hdr (struct bfd_link_info
*);
2362 extern bfd_boolean _bfd_elf_write_section_eh_frame_hdr
2363 (bfd
*, struct bfd_link_info
*);
2364 extern bfd_boolean _bfd_elf_eh_frame_present
2365 (struct bfd_link_info
*);
2366 extern bfd_boolean _bfd_elf_eh_frame_entry_present
2367 (struct bfd_link_info
*);
2368 extern bfd_boolean _bfd_elf_maybe_strip_eh_frame_hdr
2369 (struct bfd_link_info
*);
2371 extern bfd_boolean
_bfd_elf_hash_symbol (struct elf_link_hash_entry
*);
2373 extern long _bfd_elf_link_lookup_local_dynindx
2374 (struct bfd_link_info
*, bfd
*, long);
2375 extern bfd_boolean _bfd_elf_compute_section_file_positions
2376 (bfd
*, struct bfd_link_info
*);
2377 extern file_ptr _bfd_elf_assign_file_position_for_section
2378 (Elf_Internal_Shdr
*, file_ptr
, bfd_boolean
);
2379 extern bfd_boolean _bfd_elf_modify_headers
2380 (bfd
*, struct bfd_link_info
*);
2382 extern bfd_boolean _bfd_elf_validate_reloc
2385 extern bfd_boolean bfd_elf_record_link_assignment
2386 (bfd
*, struct bfd_link_info
*, const char *, bfd_boolean
,
2388 extern bfd_boolean
bfd_elf_stack_segment_size (bfd
*, struct bfd_link_info
*,
2389 const char *, bfd_vma
);
2390 extern bfd_boolean bfd_elf_size_dynamic_sections
2391 (bfd
*, const char *, const char *, const char *, const char *, const char *,
2392 const char * const *, struct bfd_link_info
*, struct bfd_section
**);
2393 extern bfd_boolean bfd_elf_size_dynsym_hash_dynstr
2394 (bfd
*, struct bfd_link_info
*);
2395 extern bfd_boolean bfd_elf_get_bfd_needed_list
2396 (bfd
*, struct bfd_link_needed_list
**);
2397 extern struct bfd_link_needed_list
*bfd_elf_get_needed_list
2398 (bfd
*, struct bfd_link_info
*);
2399 extern void bfd_elf_set_dt_needed_name
2400 (bfd
*, const char *);
2401 extern const char *bfd_elf_get_dt_soname
2403 extern void bfd_elf_set_dyn_lib_class
2404 (bfd
*, enum dynamic_lib_link_class
);
2405 extern int bfd_elf_get_dyn_lib_class
2407 extern struct bfd_link_needed_list
*bfd_elf_get_runpath_list
2408 (bfd
*, struct bfd_link_info
*);
2409 extern int bfd_elf_discard_info
2410 (bfd
*, struct bfd_link_info
*);
2411 extern unsigned int _bfd_elf_default_action_discarded
2412 (struct bfd_section
*);
2413 extern struct bfd_section
*_bfd_elf_tls_setup
2414 (bfd
*, struct bfd_link_info
*);
2416 extern bfd_boolean _bfd_elf_link_create_dynamic_sections
2417 (bfd
*, struct bfd_link_info
*);
2418 extern bfd_boolean _bfd_elf_omit_section_dynsym_default
2419 (bfd
*, struct bfd_link_info
*, asection
*);
2420 extern bfd_boolean _bfd_elf_omit_section_dynsym_all
2421 (bfd
*, struct bfd_link_info
*, asection
*);
2422 extern bfd_boolean _bfd_elf_create_dynamic_sections
2423 (bfd
*, struct bfd_link_info
*);
2424 extern bfd_boolean _bfd_elf_create_got_section
2425 (bfd
*, struct bfd_link_info
*);
2426 extern asection
*_bfd_elf_section_for_symbol
2427 (struct elf_reloc_cookie
*, unsigned long, bfd_boolean
);
2428 extern struct elf_link_hash_entry
*_bfd_elf_define_linkage_sym
2429 (bfd
*, struct bfd_link_info
*, asection
*, const char *);
2430 extern void _bfd_elf_init_1_index_section
2431 (bfd
*, struct bfd_link_info
*);
2432 extern void _bfd_elf_init_2_index_sections
2433 (bfd
*, struct bfd_link_info
*);
2435 extern bfd_boolean _bfd_elfcore_make_pseudosection
2436 (bfd
*, char *, size_t, ufile_ptr
);
2437 extern char *_bfd_elfcore_strndup
2438 (bfd
*, char *, size_t);
2440 extern Elf_Internal_Rela
*_bfd_elf_link_read_relocs
2441 (bfd
*, asection
*, void *, Elf_Internal_Rela
*, bfd_boolean
);
2443 extern bfd_boolean _bfd_elf_link_output_relocs
2444 (bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*,
2445 struct elf_link_hash_entry
**);
2447 extern bfd_boolean _bfd_elf_adjust_dynamic_copy
2448 (struct bfd_link_info
*, struct elf_link_hash_entry
*, asection
*);
2450 extern bfd_boolean _bfd_elf_dynamic_symbol_p
2451 (struct elf_link_hash_entry
*, struct bfd_link_info
*, bfd_boolean
);
2453 extern bfd_boolean _bfd_elf_symbol_refs_local_p
2454 (struct elf_link_hash_entry
*, struct bfd_link_info
*, bfd_boolean
);
2456 extern bfd_reloc_status_type bfd_elf_perform_complex_relocation
2457 (bfd
*, asection
*, bfd_byte
*, Elf_Internal_Rela
*, bfd_vma
);
2459 extern bfd_boolean _bfd_elf_setup_sections
2462 extern struct bfd_link_hash_entry
*bfd_elf_define_start_stop
2463 (struct bfd_link_info
*, const char *, asection
*);
2465 extern bfd_boolean
_bfd_elf_init_file_header (bfd
*, struct bfd_link_info
*);
2467 extern bfd_boolean
_bfd_elf_final_write_processing (bfd
*);
2469 extern bfd_cleanup bfd_elf32_object_p
2471 extern bfd_cleanup bfd_elf32_core_file_p
2473 extern char *bfd_elf32_core_file_failing_command
2475 extern int bfd_elf32_core_file_failing_signal
2477 extern bfd_boolean bfd_elf32_core_file_matches_executable_p
2479 extern int bfd_elf32_core_file_pid
2481 extern bfd_boolean _bfd_elf32_core_find_build_id
2484 extern bfd_boolean bfd_elf32_swap_symbol_in
2485 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
2486 extern void bfd_elf32_swap_symbol_out
2487 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
2488 extern void bfd_elf32_swap_reloc_in
2489 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2490 extern void bfd_elf32_swap_reloc_out
2491 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2492 extern void bfd_elf32_swap_reloca_in
2493 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2494 extern void bfd_elf32_swap_reloca_out
2495 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2496 extern void bfd_elf32_swap_phdr_in
2497 (bfd
*, const Elf32_External_Phdr
*, Elf_Internal_Phdr
*);
2498 extern void bfd_elf32_swap_phdr_out
2499 (bfd
*, const Elf_Internal_Phdr
*, Elf32_External_Phdr
*);
2500 extern void bfd_elf32_swap_dyn_in
2501 (bfd
*, const void *, Elf_Internal_Dyn
*);
2502 extern void bfd_elf32_swap_dyn_out
2503 (bfd
*, const Elf_Internal_Dyn
*, void *);
2504 extern long bfd_elf32_slurp_symbol_table
2505 (bfd
*, asymbol
**, bfd_boolean
);
2506 extern bfd_boolean bfd_elf32_write_shdrs_and_ehdr
2508 extern int bfd_elf32_write_out_phdrs
2509 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
2510 extern bfd_boolean bfd_elf32_checksum_contents
2511 (bfd
* , void (*) (const void *, size_t, void *), void *);
2512 extern void bfd_elf32_write_relocs
2513 (bfd
*, asection
*, void *);
2514 extern bfd_boolean bfd_elf32_slurp_reloc_table
2515 (bfd
*, asection
*, asymbol
**, bfd_boolean
);
2517 extern bfd_cleanup bfd_elf64_object_p
2519 extern bfd_cleanup bfd_elf64_core_file_p
2521 extern char *bfd_elf64_core_file_failing_command
2523 extern int bfd_elf64_core_file_failing_signal
2525 extern bfd_boolean bfd_elf64_core_file_matches_executable_p
2527 extern int bfd_elf64_core_file_pid
2529 extern bfd_boolean _bfd_elf64_core_find_build_id
2532 extern bfd_boolean bfd_elf64_swap_symbol_in
2533 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
2534 extern void bfd_elf64_swap_symbol_out
2535 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
2536 extern void bfd_elf64_swap_reloc_in
2537 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2538 extern void bfd_elf64_swap_reloc_out
2539 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2540 extern void bfd_elf64_swap_reloca_in
2541 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2542 extern void bfd_elf64_swap_reloca_out
2543 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2544 extern void bfd_elf64_swap_phdr_in
2545 (bfd
*, const Elf64_External_Phdr
*, Elf_Internal_Phdr
*);
2546 extern void bfd_elf64_swap_phdr_out
2547 (bfd
*, const Elf_Internal_Phdr
*, Elf64_External_Phdr
*);
2548 extern void bfd_elf64_swap_dyn_in
2549 (bfd
*, const void *, Elf_Internal_Dyn
*);
2550 extern void bfd_elf64_swap_dyn_out
2551 (bfd
*, const Elf_Internal_Dyn
*, void *);
2552 extern long bfd_elf64_slurp_symbol_table
2553 (bfd
*, asymbol
**, bfd_boolean
);
2554 extern bfd_boolean bfd_elf64_write_shdrs_and_ehdr
2556 extern int bfd_elf64_write_out_phdrs
2557 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
2558 extern bfd_boolean bfd_elf64_checksum_contents
2559 (bfd
* , void (*) (const void *, size_t, void *), void *);
2560 extern void bfd_elf64_write_relocs
2561 (bfd
*, asection
*, void *);
2562 extern bfd_boolean bfd_elf64_slurp_reloc_table
2563 (bfd
*, asection
*, asymbol
**, bfd_boolean
);
2565 extern bfd_boolean _bfd_elf_default_relocs_compatible
2566 (const bfd_target
*, const bfd_target
*);
2568 extern bfd_boolean _bfd_elf_relocs_compatible
2569 (const bfd_target
*, const bfd_target
*);
2570 extern bfd_boolean _bfd_elf_notice_as_needed
2571 (bfd
*, struct bfd_link_info
*, enum notice_asneeded_action
);
2573 extern struct elf_link_hash_entry
*_bfd_elf_archive_symbol_lookup
2574 (bfd
*, struct bfd_link_info
*, const char *);
2575 extern bfd_boolean bfd_elf_link_add_symbols
2576 (bfd
*, struct bfd_link_info
*);
2577 extern bfd_boolean _bfd_elf_add_dynamic_entry
2578 (struct bfd_link_info
*, bfd_vma
, bfd_vma
);
2579 extern bfd_boolean _bfd_elf_strip_zero_sized_dynamic_sections
2580 (struct bfd_link_info
*);
2581 extern int bfd_elf_add_dt_needed_tag
2582 (bfd
*, struct bfd_link_info
*);
2583 extern bfd_boolean _bfd_elf_link_check_relocs
2584 (bfd
*, struct bfd_link_info
*);
2586 extern bfd_boolean bfd_elf_link_record_dynamic_symbol
2587 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
2589 extern int bfd_elf_link_record_local_dynamic_symbol
2590 (struct bfd_link_info
*, bfd
*, long);
2592 extern bfd_boolean _bfd_elf_close_and_cleanup
2595 extern bfd_boolean _bfd_elf_common_definition
2596 (Elf_Internal_Sym
*);
2598 extern unsigned int _bfd_elf_common_section_index
2601 extern asection
*_bfd_elf_common_section
2604 extern bfd_vma _bfd_elf_default_got_elt_size
2605 (bfd
*, struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd
*,
2608 extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn
2609 (bfd
*, arelent
*, struct bfd_symbol
*, void *,
2610 asection
*, bfd
*, char **);
2612 extern bfd_boolean bfd_elf_final_link
2613 (bfd
*, struct bfd_link_info
*);
2615 extern void _bfd_elf_gc_keep
2616 (struct bfd_link_info
*info
);
2618 extern bfd_boolean bfd_elf_gc_mark_dynamic_ref_symbol
2619 (struct elf_link_hash_entry
*h
, void *inf
);
2621 extern bfd_boolean bfd_elf_gc_sections
2622 (bfd
*, struct bfd_link_info
*);
2624 extern bfd_boolean bfd_elf_gc_record_vtinherit
2625 (bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
);
2627 extern bfd_boolean bfd_elf_gc_record_vtentry
2628 (bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
);
2630 extern asection
*_bfd_elf_gc_mark_hook
2631 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
2632 struct elf_link_hash_entry
*, Elf_Internal_Sym
*);
2634 extern asection
*_bfd_elf_gc_mark_rsec
2635 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
,
2636 struct elf_reloc_cookie
*, bfd_boolean
*);
2638 extern bfd_boolean _bfd_elf_gc_mark_reloc
2639 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
,
2640 struct elf_reloc_cookie
*);
2642 extern bfd_boolean _bfd_elf_gc_mark_fdes
2643 (struct bfd_link_info
*, asection
*, asection
*, elf_gc_mark_hook_fn
,
2644 struct elf_reloc_cookie
*);
2646 extern bfd_boolean _bfd_elf_gc_mark
2647 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
);
2649 extern bfd_boolean _bfd_elf_gc_mark_extra_sections
2650 (struct bfd_link_info
*, elf_gc_mark_hook_fn
);
2652 extern bfd_boolean bfd_elf_gc_common_finalize_got_offsets
2653 (bfd
*, struct bfd_link_info
*);
2655 extern bfd_boolean bfd_elf_gc_common_final_link
2656 (bfd
*, struct bfd_link_info
*);
2658 extern bfd_boolean bfd_elf_reloc_symbol_deleted_p
2661 extern struct elf_segment_map
* _bfd_elf_make_dynamic_segment
2662 (bfd
*, asection
*);
2664 extern bfd_boolean _bfd_elf_map_sections_to_segments
2665 (bfd
*, struct bfd_link_info
*);
2667 extern bfd_boolean
_bfd_elf_is_function_type (unsigned int);
2669 extern bfd_size_type
_bfd_elf_maybe_function_sym (const asymbol
*, asection
*,
2672 extern asection
*_bfd_elf_plt_get_reloc_section (bfd
*, const char *);
2674 extern int bfd_elf_get_default_section_type (flagword
);
2676 extern bfd_boolean bfd_elf_lookup_section_flags
2677 (struct bfd_link_info
*, struct flag_info
*, asection
*);
2679 extern Elf_Internal_Phdr
* _bfd_elf_find_segment_containing_section
2680 (bfd
* abfd
, asection
* section
);
2682 /* PowerPC @tls opcode transform/validate. */
2683 extern unsigned int _bfd_elf_ppc_at_tls_transform
2684 (unsigned int, unsigned int);
2685 /* PowerPC @tprel opcode transform/validate. */
2686 extern unsigned int _bfd_elf_ppc_at_tprel_transform
2687 (unsigned int, unsigned int);
2688 /* PowerPC elf_object_p tweak. */
2689 extern bfd_boolean
_bfd_elf_ppc_set_arch (bfd
*);
2690 /* PowerPC .gnu.attributes handling common to both 32-bit and 64-bit. */
2691 extern bfd_boolean _bfd_elf_ppc_merge_fp_attributes
2692 (bfd
*, struct bfd_link_info
*);
2694 /* Return an upper bound on the number of bytes required to store a
2695 copy of ABFD's program header table entries. Return -1 if an error
2696 occurs; bfd_get_error will return an appropriate code. */
2697 extern long bfd_get_elf_phdr_upper_bound
2700 /* Copy ABFD's program header table entries to *PHDRS. The entries
2701 will be stored as an array of Elf_Internal_Phdr structures, as
2702 defined in include/elf/internal.h. To find out how large the
2703 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
2705 Return the number of program header table entries read, or -1 if an
2706 error occurs; bfd_get_error will return an appropriate code. */
2707 extern int bfd_get_elf_phdrs
2708 (bfd
*abfd
, void *phdrs
);
2710 /* Exported interface for writing elf corefile notes. */
2711 extern char *elfcore_write_note
2712 (bfd
*, char *, int *, const char *, int, const void *, int);
2713 extern char *elfcore_write_prpsinfo
2714 (bfd
*, char *, int *, const char *, const char *);
2715 extern char *elfcore_write_prstatus
2716 (bfd
*, char *, int *, long, int, const void *);
2717 extern char * elfcore_write_pstatus
2718 (bfd
*, char *, int *, long, int, const void *);
2719 extern char *elfcore_write_prfpreg
2720 (bfd
*, char *, int *, const void *, int);
2721 extern char *elfcore_write_prxfpreg
2722 (bfd
*, char *, int *, const void *, int);
2723 extern char *elfcore_write_xstatereg
2724 (bfd
*, char *, int *, const void *, int);
2725 extern char *elfcore_write_ppc_vmx
2726 (bfd
*, char *, int *, const void *, int);
2727 extern char *elfcore_write_ppc_vsx
2728 (bfd
*, char *, int *, const void *, int);
2729 extern char *elfcore_write_ppc_tar
2730 (bfd
*, char *, int *, const void *, int);
2731 extern char *elfcore_write_ppc_ppr
2732 (bfd
*, char *, int *, const void *, int);
2733 extern char *elfcore_write_ppc_dscr
2734 (bfd
*, char *, int *, const void *, int);
2735 extern char *elfcore_write_ppc_ebb
2736 (bfd
*, char *, int *, const void *, int);
2737 extern char *elfcore_write_ppc_pmu
2738 (bfd
*, char *, int *, const void *, int);
2739 extern char *elfcore_write_ppc_tm_cgpr
2740 (bfd
*, char *, int *, const void *, int);
2741 extern char *elfcore_write_ppc_tm_cfpr
2742 (bfd
*, char *, int *, const void *, int);
2743 extern char *elfcore_write_ppc_tm_cvmx
2744 (bfd
*, char *, int *, const void *, int);
2745 extern char *elfcore_write_ppc_tm_cvsx
2746 (bfd
*, char *, int *, const void *, int);
2747 extern char *elfcore_write_ppc_tm_spr
2748 (bfd
*, char *, int *, const void *, int);
2749 extern char *elfcore_write_ppc_tm_ctar
2750 (bfd
*, char *, int *, const void *, int);
2751 extern char *elfcore_write_ppc_tm_cppr
2752 (bfd
*, char *, int *, const void *, int);
2753 extern char *elfcore_write_ppc_tm_cdscr
2754 (bfd
*, char *, int *, const void *, int);
2755 extern char *elfcore_write_s390_timer
2756 (bfd
*, char *, int *, const void *, int);
2757 extern char *elfcore_write_s390_todcmp
2758 (bfd
*, char *, int *, const void *, int);
2759 extern char *elfcore_write_s390_todpreg
2760 (bfd
*, char *, int *, const void *, int);
2761 extern char *elfcore_write_s390_ctrs
2762 (bfd
*, char *, int *, const void *, int);
2763 extern char *elfcore_write_s390_prefix
2764 (bfd
*, char *, int *, const void *, int);
2765 extern char *elfcore_write_s390_last_break
2766 (bfd
*, char *, int *, const void *, int);
2767 extern char *elfcore_write_s390_system_call
2768 (bfd
*, char *, int *, const void *, int);
2769 extern char *elfcore_write_s390_tdb
2770 (bfd
*, char *, int *, const void *, int);
2771 extern char *elfcore_write_s390_vxrs_low
2772 (bfd
*, char *, int *, const void *, int);
2773 extern char *elfcore_write_s390_vxrs_high
2774 (bfd
*, char *, int *, const void *, int);
2775 extern char *elfcore_write_s390_gs_cb
2776 (bfd
*, char *, int *, const void *, int);
2777 extern char *elfcore_write_s390_gs_bc
2778 (bfd
*, char *, int *, const void *, int);
2779 extern char *elfcore_write_arm_vfp
2780 (bfd
*, char *, int *, const void *, int);
2781 extern char *elfcore_write_aarch_tls
2782 (bfd
*, char *, int *, const void *, int);
2783 extern char *elfcore_write_aarch_hw_break
2784 (bfd
*, char *, int *, const void *, int);
2785 extern char *elfcore_write_aarch_hw_watch
2786 (bfd
*, char *, int *, const void *, int);
2787 extern char *elfcore_write_aarch_sve
2788 (bfd
*, char *, int *, const void *, int);
2789 extern char *elfcore_write_aarch_pauth
2790 (bfd
*, char *, int *, const void *, int);
2791 extern char *elfcore_write_arc_v2
2792 (bfd
*, char *, int *, const void *, int);
2793 extern char *elfcore_write_lwpstatus
2794 (bfd
*, char *, int *, long, int, const void *);
2795 extern char *elfcore_write_register_note
2796 (bfd
*, char *, int *, const char *, const void *, int);
2798 /* Internal structure which holds information to be included in the
2799 PRPSINFO section of Linux core files.
2801 This is an "internal" structure in the sense that it should be used
2802 to pass information to BFD (via the `elfcore_write_linux_prpsinfo'
2803 function), so things like endianess shouldn't be an issue. This
2804 structure will eventually be converted in one of the
2805 `elf_external_linux_*' structures and written out to an output bfd
2806 by one of the functions declared below. */
2808 struct elf_internal_linux_prpsinfo
2810 char pr_state
; /* Numeric process state. */
2811 char pr_sname
; /* Char for pr_state. */
2812 char pr_zomb
; /* Zombie. */
2813 char pr_nice
; /* Nice val. */
2814 unsigned long pr_flag
; /* Flags. */
2815 unsigned int pr_uid
;
2816 unsigned int pr_gid
;
2817 int pr_pid
, pr_ppid
, pr_pgrp
, pr_sid
;
2818 char pr_fname
[16 + 1]; /* Filename of executable. */
2819 char pr_psargs
[80 + 1]; /* Initial part of arg list. */
2822 /* Linux/most 32-bit archs. */
2823 extern char *elfcore_write_linux_prpsinfo32
2824 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
2826 /* Linux/most 64-bit archs. */
2827 extern char *elfcore_write_linux_prpsinfo64
2828 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
2830 extern bfd
*_bfd_elf32_bfd_from_remote_memory
2831 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
2832 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, bfd_size_type
));
2833 extern bfd
*_bfd_elf64_bfd_from_remote_memory
2834 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
2835 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, bfd_size_type
));
2837 extern bfd_vma
bfd_elf_obj_attr_size (bfd
*);
2838 extern void bfd_elf_set_obj_attr_contents (bfd
*, bfd_byte
*, bfd_vma
);
2839 extern int bfd_elf_get_obj_attr_int (bfd
*, int, unsigned int);
2840 extern void bfd_elf_add_obj_attr_int (bfd
*, int, unsigned int, unsigned int);
2841 #define bfd_elf_add_proc_attr_int(BFD, TAG, VALUE) \
2842 bfd_elf_add_obj_attr_int ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2843 extern void bfd_elf_add_obj_attr_string (bfd
*, int, unsigned int, const char *);
2844 #define bfd_elf_add_proc_attr_string(BFD, TAG, VALUE) \
2845 bfd_elf_add_obj_attr_string ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2846 extern void bfd_elf_add_obj_attr_int_string (bfd
*, int, unsigned int,
2847 unsigned int, const char *);
2848 #define bfd_elf_add_proc_attr_int_string(BFD, TAG, INTVAL, STRVAL) \
2849 bfd_elf_add_obj_attr_int_string ((BFD), OBJ_ATTR_PROC, (TAG), \
2852 extern char *_bfd_elf_attr_strdup (bfd
*, const char *);
2853 extern void _bfd_elf_copy_obj_attributes (bfd
*, bfd
*);
2854 extern int _bfd_elf_obj_attrs_arg_type (bfd
*, int, unsigned int);
2855 extern void _bfd_elf_parse_attributes (bfd
*, Elf_Internal_Shdr
*);
2856 extern bfd_boolean _bfd_elf_merge_object_attributes
2857 (bfd
*, struct bfd_link_info
*);
2858 extern bfd_boolean
_bfd_elf_merge_unknown_attribute_low (bfd
*, bfd
*, int);
2859 extern bfd_boolean
_bfd_elf_merge_unknown_attribute_list (bfd
*, bfd
*);
2860 extern Elf_Internal_Shdr
*_bfd_elf_single_rel_hdr (asection
*sec
);
2861 extern bfd_boolean
elf_read_notes (bfd
*, file_ptr
, bfd_size_type
, size_t);
2863 extern bfd_boolean _bfd_elf_parse_gnu_properties
2864 (bfd
*, Elf_Internal_Note
*);
2865 extern elf_property
* _bfd_elf_get_property
2866 (bfd
*, unsigned int, unsigned int);
2867 extern bfd
*_bfd_elf_link_setup_gnu_properties
2868 (struct bfd_link_info
*);
2869 extern bfd_size_type _bfd_elf_convert_gnu_property_size
2871 extern bfd_boolean _bfd_elf_convert_gnu_properties
2872 (bfd
*, asection
*, bfd
*, bfd_byte
**, bfd_size_type
*);
2874 /* The linker may need to keep track of the number of relocs that it
2875 decides to copy as dynamic relocs in check_relocs for each symbol.
2876 This is so that it can later discard them if they are found to be
2877 unnecessary. We can store the information in a field extending the
2878 regular ELF linker hash table. */
2880 struct elf_dyn_relocs
2882 struct elf_dyn_relocs
*next
;
2884 /* The input section of the reloc. */
2887 /* Total number of relocs copied for the input section. */
2888 bfd_size_type count
;
2890 /* Number of pc-relative relocs copied for the input section. */
2891 bfd_size_type pc_count
;
2894 extern bfd_boolean _bfd_elf_create_ifunc_sections
2895 (bfd
*, struct bfd_link_info
*);
2896 extern bfd_boolean _bfd_elf_allocate_ifunc_dyn_relocs
2897 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
2898 struct elf_dyn_relocs
**, unsigned int, unsigned int,
2899 unsigned int, bfd_boolean
);
2901 extern void elf_append_rela (bfd
*, asection
*, Elf_Internal_Rela
*);
2902 extern void elf_append_rel (bfd
*, asection
*, Elf_Internal_Rela
*);
2904 extern bfd_vma
elf64_r_info (bfd_vma
, bfd_vma
);
2905 extern bfd_vma
elf64_r_sym (bfd_vma
);
2906 extern bfd_vma
elf32_r_info (bfd_vma
, bfd_vma
);
2907 extern bfd_vma
elf32_r_sym (bfd_vma
);
2909 extern bfd_boolean
is_debuginfo_file (bfd
*);
2912 extern bfd_boolean _bfd_elf_init_secondary_reloc_section
2913 (bfd
*, Elf_Internal_Shdr
*, const char *, unsigned int);
2914 extern bfd_boolean _bfd_elf_slurp_secondary_reloc_section
2915 (bfd
*, asection
*, asymbol
**);
2916 extern bfd_boolean _bfd_elf_copy_special_section_fields
2917 (const bfd
*, bfd
*, const Elf_Internal_Shdr
*, Elf_Internal_Shdr
*);
2918 extern bfd_boolean _bfd_elf_write_secondary_reloc_section
2919 (bfd
*, asection
*);
2920 extern unsigned int _bfd_elf_symbol_section_index
2921 (bfd
*, elf_symbol_type
*);
2923 extern asection
*_bfd_elf_readonly_dynrelocs
2924 (struct elf_link_hash_entry
*);
2925 extern bfd_boolean _bfd_elf_maybe_set_textrel
2926 (struct elf_link_hash_entry
*, void *);
2928 extern bfd_boolean _bfd_elf_add_dynamic_tags
2929 (bfd
*, struct bfd_link_info
*, bfd_boolean
);
2931 /* Large common section. */
2932 extern asection _bfd_elf_large_com_section
;
2934 /* Hash for local symbol with the first section id, ID, in the input
2935 file and the local symbol index, SYM. */
2936 #define ELF_LOCAL_SYMBOL_HASH(ID, SYM) \
2937 (((((ID) & 0xffU) << 24) | (((ID) & 0xff00) << 8)) \
2938 ^ (SYM) ^ (((ID) & 0xffff0000U) >> 16))
2940 /* This is the condition under which finish_dynamic_symbol will be called.
2941 If our finish_dynamic_symbol isn't called, we'll need to do something
2942 about initializing any .plt and .got entries in relocate_section. */
2943 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
2945 && ((SHARED) || !(H)->forced_local) \
2946 && ((H)->dynindx != -1 || (H)->forced_local))
2948 /* This macro is to avoid lots of duplicated code in the body
2949 of xxx_relocate_section() in the various elfxx-xxxx.c files. */
2950 #define RELOC_FOR_GLOBAL_SYMBOL(info, input_bfd, input_section, rel, \
2951 r_symndx, symtab_hdr, sym_hashes, \
2952 h, sec, relocation, \
2953 unresolved_reloc, warned, ignored) \
2956 /* It seems this can happen with erroneous or unsupported \
2957 input (mixing a.out and elf in an archive, for example.) */ \
2958 if (sym_hashes == NULL) \
2961 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; \
2963 if (info->wrap_hash != NULL \
2964 && (input_section->flags & SEC_DEBUGGING) != 0) \
2965 h = ((struct elf_link_hash_entry *) \
2966 unwrap_hash_lookup (info, input_bfd, &h->root)); \
2968 while (h->root.type == bfd_link_hash_indirect \
2969 || h->root.type == bfd_link_hash_warning) \
2970 h = (struct elf_link_hash_entry *) h->root.u.i.link; \
2974 unresolved_reloc = FALSE; \
2976 if (h->root.type == bfd_link_hash_defined \
2977 || h->root.type == bfd_link_hash_defweak) \
2979 sec = h->root.u.def.section; \
2981 || sec->output_section == NULL) \
2982 /* Set a flag that will be cleared later if we find a \
2983 relocation value for this symbol. output_section \
2984 is typically NULL for symbols satisfied by a shared \
2986 unresolved_reloc = TRUE; \
2988 relocation = (h->root.u.def.value \
2989 + sec->output_section->vma \
2990 + sec->output_offset); \
2992 else if (h->root.type == bfd_link_hash_undefweak) \
2994 else if (info->unresolved_syms_in_objects == RM_IGNORE \
2995 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) \
2997 else if (!bfd_link_relocatable (info)) \
3000 err = (info->unresolved_syms_in_objects == RM_DIAGNOSE && \
3001 !info->warn_unresolved_syms) \
3002 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT; \
3003 (*info->callbacks->undefined_symbol) (info, \
3004 h->root.root.string, \
3007 rel->r_offset, err); \
3010 (void) unresolved_reloc; \
3016 /* This macro is to avoid lots of duplicated code in the body of the
3017 loop over relocations in xxx_relocate_section() in the various
3020 Handle relocations against symbols from removed linkonce sections,
3021 or sections discarded by a linker script. When doing a relocatable
3022 link, we remove such relocations. Otherwise, we just want the
3023 section contents zeroed and avoid any special processing. */
3024 #define RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
3025 rel, count, relend, \
3026 howto, index, contents) \
3029 _bfd_clear_contents (howto, input_bfd, input_section, \
3030 contents, rel[index].r_offset); \
3032 if (bfd_link_relocatable (info) \
3033 && (input_section->flags & SEC_DEBUGGING)) \
3035 /* Only remove relocations in debug sections since other \
3036 sections may require relocations. */ \
3037 Elf_Internal_Shdr *rel_hdr; \
3039 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
3041 /* Avoid empty output section. */ \
3042 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
3044 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
3045 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
3046 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
3048 memmove (rel, rel + count, \
3049 (relend - rel - count) * sizeof (*rel)); \
3051 input_section->reloc_count -= count; \
3058 for (i_ = 0; i_ < count; i_++) \
3060 rel[i_].r_info = 0; \
3061 rel[i_].r_addend = 0; \
3067 /* Will a symbol be bound to the definition within the shared
3068 library, if any. A unique symbol can never be bound locally. */
3069 #define SYMBOLIC_BIND(INFO, H) \
3070 (!(H)->unique_global \
3071 && ((INFO)->symbolic \
3072 || (H)->start_stop \
3073 || ((INFO)->dynamic && !(H)->dynamic)))
3075 /* Determine if a section contains CTF data, using its name. */
3076 static inline bfd_boolean
3077 bfd_section_is_ctf (const asection
*sec
)
3079 const char *name
= bfd_section_name (sec
);
3080 return strncmp (name
, ".ctf", 4) == 0 && (name
[4] == 0 || name
[4] == '.');
3086 #endif /* _LIBELF_H_ */