1 /* BFD back-end data structures for ELF files.
2 Copyright (C) 1992-2017 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
;
162 /* Symbol type (STT_NOTYPE, STT_OBJECT, etc.). */
163 unsigned int type
: 8;
165 /* Symbol st_other value, symbol visibility. */
166 unsigned int other
: 8;
168 /* The symbol's st_target_internal value (see Elf_Internal_Sym). */
169 unsigned int target_internal
: 8;
171 /* Symbol is referenced by a non-shared object (other than the object
172 in which it is defined). */
173 unsigned int ref_regular
: 1;
174 /* Symbol is defined by a non-shared object. */
175 unsigned int def_regular
: 1;
176 /* Symbol is referenced by a shared object. */
177 unsigned int ref_dynamic
: 1;
178 /* Symbol is defined by a shared object. */
179 unsigned int def_dynamic
: 1;
180 /* Symbol has a non-weak reference from a non-shared object (other than
181 the object in which it is defined). */
182 unsigned int ref_regular_nonweak
: 1;
183 /* Dynamic symbol has been adjustd. */
184 unsigned int dynamic_adjusted
: 1;
185 /* Symbol needs a copy reloc. */
186 unsigned int needs_copy
: 1;
187 /* Symbol needs a procedure linkage table entry. */
188 unsigned int needs_plt
: 1;
189 /* Symbol appears in a non-ELF input file. */
190 unsigned int non_elf
: 1;
191 /* Symbol version information. */
192 ENUM_BITFIELD (elf_symbol_version
) versioned
: 2;
193 /* Symbol was forced to local scope due to a version script file. */
194 unsigned int forced_local
: 1;
195 /* Symbol was forced to be dynamic due to a version script file. */
196 unsigned int dynamic
: 1;
197 /* Symbol was marked during garbage collection. */
198 unsigned int mark
: 1;
199 /* Symbol is referenced by a non-GOT/non-PLT relocation. This is
200 not currently set by all the backends. */
201 unsigned int non_got_ref
: 1;
202 /* Symbol has a definition in a shared object.
203 FIXME: There is no real need for this field if def_dynamic is never
204 cleared and all places that test def_dynamic also test def_regular. */
205 unsigned int dynamic_def
: 1;
206 /* Symbol has a non-weak reference from a shared object. */
207 unsigned int ref_dynamic_nonweak
: 1;
208 /* Symbol is referenced with a relocation where C/C++ pointer equality
210 unsigned int pointer_equality_needed
: 1;
211 /* Symbol is a unique global symbol. */
212 unsigned int unique_global
: 1;
213 /* Symbol is defined by a shared library with non-default visibility
214 in a read/write section. */
215 unsigned int protected_def
: 1;
217 /* String table index in .dynstr if this is a dynamic symbol. */
218 unsigned long dynstr_index
;
222 /* If this is a weak defined symbol from a dynamic object, this
223 field points to a defined symbol with the same value, if there is
224 one. Otherwise it is NULL. */
225 struct elf_link_hash_entry
*weakdef
;
227 /* Hash value of the name computed using the ELF hash function.
228 Used part way through size_dynamic_sections, after we've finished
230 unsigned long elf_hash_value
;
233 /* Version information. */
236 /* This field is used for a symbol which is not defined in a
237 regular object. It points to the version information read in
238 from the dynamic object. */
239 Elf_Internal_Verdef
*verdef
;
240 /* This field is used for a symbol which is defined in a regular
241 object. It is set up in size_dynamic_sections. It points to
242 the version information we should write out for this symbol. */
243 struct bfd_elf_version_tree
*vertree
;
246 struct elf_link_virtual_table_entry
*vtable
;
249 /* Will references to this symbol always reference the symbol
251 #define SYMBOL_REFERENCES_LOCAL(INFO, H) \
252 _bfd_elf_symbol_refs_local_p (H, INFO, 0)
254 /* Will _calls_ to this symbol always call the version in this object? */
255 #define SYMBOL_CALLS_LOCAL(INFO, H) \
256 _bfd_elf_symbol_refs_local_p (H, INFO, 1)
258 /* Common symbols that are turned into definitions don't have the
259 DEF_REGULAR flag set, so they might appear to be undefined.
260 Symbols defined in linker scripts also don't have DEF_REGULAR set. */
261 #define ELF_COMMON_DEF_P(H) \
263 && !(H)->def_dynamic \
264 && (H)->root.type == bfd_link_hash_defined)
266 /* Records local symbols to be emitted in the dynamic symbol table. */
268 struct elf_link_local_dynamic_entry
270 struct elf_link_local_dynamic_entry
*next
;
272 /* The input bfd this symbol came from. */
275 /* The index of the local symbol being copied. */
278 /* The index in the outgoing dynamic symbol table. */
281 /* A copy of the input symbol. */
282 Elf_Internal_Sym isym
;
285 struct elf_link_loaded_list
287 struct elf_link_loaded_list
*next
;
291 /* Structures used by the eh_frame optimization code. */
296 /* If REMOVED == 1, this is the CIE that the FDE originally used.
297 The CIE belongs to the same .eh_frame input section as the FDE.
299 If REMOVED == 0, this is the CIE that we have chosen to use for
300 the output FDE. The CIE's REMOVED field is also 0, but the CIE
301 might belong to a different .eh_frame input section from the FDE.
303 May be NULL to signify that the FDE should be discarded. */
304 struct eh_cie_fde
*cie_inf
;
305 struct eh_cie_fde
*next_for_section
;
308 /* CIEs have three states:
310 - REMOVED && !MERGED: Slated for removal because we haven't yet
311 proven that an FDE needs it. FULL_CIE, if nonnull, points to
312 more detailed information about the CIE.
314 - REMOVED && MERGED: We have merged this CIE with MERGED_WITH,
315 which may not belong to the same input section.
317 - !REMOVED: We have decided to keep this CIE. SEC is the
318 .eh_frame input section that contains the CIE. */
320 struct cie
*full_cie
;
321 struct eh_cie_fde
*merged_with
;
325 /* The offset of the personality data from the start of the CIE,
326 or 0 if the CIE doesn't have any. */
327 unsigned int personality_offset
: 8;
329 /* True if we have marked relocations associated with this CIE. */
330 unsigned int gc_mark
: 1;
332 /* True if we have decided to turn an absolute LSDA encoding into
333 a PC-relative one. */
334 unsigned int make_lsda_relative
: 1;
336 /* True if we have decided to turn an absolute personality
337 encoding into a PC-relative one. */
338 unsigned int make_per_encoding_relative
: 1;
340 /* True if the CIE contains personality data and if that
341 data uses a PC-relative encoding. Always true when
342 make_per_encoding_relative is. */
343 unsigned int per_encoding_relative
: 1;
345 /* True if the CIE contains personality data aligned to a
346 multiple of eight bytes. */
347 unsigned int per_encoding_aligned8
: 1;
349 /* True if we need to add an 'R' (FDE encoding) entry to the
350 CIE's augmentation data. */
351 unsigned int add_fde_encoding
: 1;
353 /* True if we have merged this CIE with another. */
354 unsigned int merged
: 1;
357 unsigned int pad1
: 17;
360 unsigned int reloc_index
;
363 unsigned int new_offset
;
364 unsigned int fde_encoding
: 8;
365 unsigned int lsda_encoding
: 8;
366 unsigned int lsda_offset
: 8;
368 /* True if this entry represents a CIE, false if it represents an FDE. */
369 unsigned int cie
: 1;
371 /* True if this entry is currently marked for removal. */
372 unsigned int removed
: 1;
374 /* True if we need to add a 'z' (augmentation size) entry to the CIE's
375 augmentation data, and an associated byte to each of the CIE's FDEs. */
376 unsigned int add_augmentation_size
: 1;
378 /* True if we have decided to convert absolute FDE relocations into
379 relative ones. This applies to the first relocation in the FDE,
380 which is against the code that the FDE describes. */
381 unsigned int make_relative
: 1;
384 unsigned int pad1
: 4;
386 unsigned int *set_loc
;
389 struct eh_frame_sec_info
393 struct eh_cie_fde entry
[1];
396 struct eh_frame_array_ent
405 #define DWARF2_EH_HDR 1
406 #define COMPACT_EH_HDR 2
408 /* Endian-neutral code indicating that a function cannot be unwound. */
409 #define COMPACT_EH_CANT_UNWIND_OPCODE 0x015d5d01
411 struct dwarf_eh_frame_hdr_info
414 unsigned int fde_count
;
415 /* TRUE if .eh_frame_hdr should contain the sorted search table.
416 We build it if we successfully read all .eh_frame input sections
417 and recognize them. */
419 struct eh_frame_array_ent
*array
;
422 struct compact_eh_frame_hdr_info
424 unsigned int allocated_entries
;
425 /* eh_frame_entry fragments. */
429 struct eh_frame_hdr_info
432 unsigned int array_count
;
433 bfd_boolean frame_hdr_is_compact
;
436 struct dwarf_eh_frame_hdr_info dwarf
;
437 struct compact_eh_frame_hdr_info compact
;
442 /* Enum used to identify target specific extensions to the elf_obj_tdata
443 and elf_link_hash_table structures. Note the enums deliberately start
444 from 1 so that we can detect an uninitialized field. The generic value
445 is last so that additions to this enum do not need to modify more than
449 AARCH64_ELF_DATA
= 1,
489 struct elf_sym_strtab
491 Elf_Internal_Sym sym
;
492 unsigned long dest_index
;
493 unsigned long destshndx_index
;
496 /* ELF linker hash table. */
498 struct elf_link_hash_table
500 struct bfd_link_hash_table root
;
502 /* An identifier used to distinguish different target
503 specific extensions to this structure. */
504 enum elf_target_id hash_table_id
;
506 /* Whether we have created the special dynamic sections required
507 when linking against or generating a shared object. */
508 bfd_boolean dynamic_sections_created
;
510 /* True if this target has relocatable executables, so needs dynamic
512 bfd_boolean is_relocatable_executable
;
514 /* The BFD used to hold special sections created by the linker.
515 This will be the first BFD found which requires these sections to
519 /* The value to use when initialising got.refcount/offset and
520 plt.refcount/offset in an elf_link_hash_entry. Set to zero when
521 the values are refcounts. Set to init_got_offset/init_plt_offset
522 in size_dynamic_sections when the values may be offsets. */
523 union gotplt_union init_got_refcount
;
524 union gotplt_union init_plt_refcount
;
526 /* The value to use for got.refcount/offset and plt.refcount/offset
527 when the values may be offsets. Normally (bfd_vma) -1. */
528 union gotplt_union init_got_offset
;
529 union gotplt_union init_plt_offset
;
531 /* The number of symbols found in the link which is intended for the
532 mandatory DT_SYMTAB tag (.dynsym section) in .dynamic section. */
533 bfd_size_type dynsymcount
;
534 bfd_size_type local_dynsymcount
;
536 /* The string table of dynamic symbols, which becomes the .dynstr
538 struct elf_strtab_hash
*dynstr
;
540 /* The number of symbol strings found in the link which must be put
541 into the .strtab section. */
542 bfd_size_type strtabcount
;
544 /* The array size of the symbol string table, which becomes the
546 bfd_size_type strtabsize
;
548 /* The array of strings, which becomes the .strtab section. */
549 struct elf_sym_strtab
*strtab
;
551 /* The number of buckets in the hash table in the .hash section.
552 This is based on the number of dynamic symbols. */
553 bfd_size_type bucketcount
;
555 /* A linked list of DT_NEEDED names found in dynamic objects
556 included in the link. */
557 struct bfd_link_needed_list
*needed
;
559 /* Sections in the output bfd that provides a section symbol
560 to be used by relocations emitted against local symbols.
561 Most targets will not use data_index_section. */
562 asection
*text_index_section
;
563 asection
*data_index_section
;
565 /* The _GLOBAL_OFFSET_TABLE_ symbol. */
566 struct elf_link_hash_entry
*hgot
;
568 /* The _PROCEDURE_LINKAGE_TABLE_ symbol. */
569 struct elf_link_hash_entry
*hplt
;
571 /* The _DYNAMIC symbol. */
572 struct elf_link_hash_entry
*hdynamic
;
574 /* A pointer to information used to merge SEC_MERGE sections. */
577 /* Used to link stabs in sections. */
578 struct stab_info stab_info
;
580 /* Used by eh_frame code when editing .eh_frame. */
581 struct eh_frame_hdr_info eh_info
;
583 /* A linked list of local symbols to be added to .dynsym. */
584 struct elf_link_local_dynamic_entry
*dynlocal
;
586 /* A linked list of DT_RPATH/DT_RUNPATH names found in dynamic
587 objects included in the link. */
588 struct bfd_link_needed_list
*runpath
;
590 /* Cached first output tls section and size of PT_TLS segment. */
592 bfd_size_type tls_size
;
594 /* A linked list of BFD's loaded in the link. */
595 struct elf_link_loaded_list
*loaded
;
597 /* Short-cuts to get to dynamic linker sections. */
606 asection
*sreldynrelro
;
614 /* Look up an entry in an ELF linker hash table. */
616 #define elf_link_hash_lookup(table, string, create, copy, follow) \
617 ((struct elf_link_hash_entry *) \
618 bfd_link_hash_lookup (&(table)->root, (string), (create), \
621 /* Traverse an ELF linker hash table. */
623 #define elf_link_hash_traverse(table, func, info) \
624 (bfd_link_hash_traverse \
626 (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func), \
629 /* Get the ELF linker hash table from a link_info structure. */
631 #define elf_hash_table(p) ((struct elf_link_hash_table *) ((p)->hash))
633 #define elf_hash_table_id(table) ((table) -> hash_table_id)
635 /* Returns TRUE if the hash table is a struct elf_link_hash_table. */
636 #define is_elf_hash_table(htab) \
637 (((struct bfd_link_hash_table *) (htab))->type == bfd_link_elf_hash_table)
639 /* Used by bfd_sym_from_r_symndx to cache a small number of local
641 #define LOCAL_SYM_CACHE_SIZE 32
645 unsigned long indx
[LOCAL_SYM_CACHE_SIZE
];
646 Elf_Internal_Sym sym
[LOCAL_SYM_CACHE_SIZE
];
649 /* Constant information held for an ELF backend. */
651 struct elf_size_info
{
652 unsigned char sizeof_ehdr
, sizeof_phdr
, sizeof_shdr
;
653 unsigned char sizeof_rel
, sizeof_rela
, sizeof_sym
, sizeof_dyn
, sizeof_note
;
655 /* The size of entries in the .hash section. */
656 unsigned char sizeof_hash_entry
;
658 /* The number of internal relocations to allocate per external
660 unsigned char int_rels_per_ext_rel
;
661 /* We use some fixed size arrays. This should be large enough to
662 handle all back-ends. */
663 #define MAX_INT_RELS_PER_EXT_REL 3
665 unsigned char arch_size
, log_file_align
;
666 unsigned char elfclass
, ev_current
;
667 int (*write_out_phdrs
)
668 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
670 (*write_shdrs_and_ehdr
) (bfd
*);
671 bfd_boolean (*checksum_contents
)
672 (bfd
* , void (*) (const void *, size_t, void *), void *);
674 (bfd
*, asection
*, void *);
675 bfd_boolean (*swap_symbol_in
)
676 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
677 void (*swap_symbol_out
)
678 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
679 bfd_boolean (*slurp_reloc_table
)
680 (bfd
*, asection
*, asymbol
**, bfd_boolean
);
681 long (*slurp_symbol_table
)
682 (bfd
*, asymbol
**, bfd_boolean
);
684 (bfd
*, const void *, Elf_Internal_Dyn
*);
686 (bfd
*, const Elf_Internal_Dyn
*, void *);
688 /* This function is called to swap in a REL relocation. If an
689 external relocation corresponds to more than one internal
690 relocation, then all relocations are swapped in at once. */
691 void (*swap_reloc_in
)
692 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
694 /* This function is called to swap out a REL relocation. */
695 void (*swap_reloc_out
)
696 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
698 /* This function is called to swap in a RELA relocation. If an
699 external relocation corresponds to more than one internal
700 relocation, then all relocations are swapped in at once. */
701 void (*swap_reloca_in
)
702 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
704 /* This function is called to swap out a RELA relocation. */
705 void (*swap_reloca_out
)
706 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
709 #define elf_symbol_from(ABFD,S) \
710 (((S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \
711 && (S)->the_bfd->tdata.elf_obj_data != 0) \
712 ? (elf_symbol_type *) (S) \
715 enum elf_reloc_type_class
{
717 reloc_class_relative
,
723 struct elf_reloc_cookie
725 Elf_Internal_Rela
*rels
, *rel
, *relend
;
726 Elf_Internal_Sym
*locsyms
;
730 struct elf_link_hash_entry
**sym_hashes
;
732 bfd_boolean bad_symtab
;
735 /* The level of IRIX compatibility we're striving for. */
743 /* Mapping of ELF section names and types. */
744 struct bfd_elf_special_section
747 unsigned int prefix_length
;
748 /* 0 means name must match PREFIX exactly.
749 -1 means name must start with PREFIX followed by an arbitrary string.
750 -2 means name must match PREFIX exactly or consist of PREFIX followed
751 by a dot then anything.
752 > 0 means name must start with the first PREFIX_LENGTH chars of
753 PREFIX and finish with the last SUFFIX_LENGTH chars of PREFIX. */
754 signed int suffix_length
;
759 enum action_discarded
765 typedef asection
* (*elf_gc_mark_hook_fn
)
766 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
767 struct elf_link_hash_entry
*, Elf_Internal_Sym
*);
769 struct bfd_elf_section_reloc_data
;
771 struct elf_backend_data
773 /* The architecture for this backend. */
774 enum bfd_architecture arch
;
776 /* An identifier used to distinguish different target specific
777 extensions to elf_obj_tdata and elf_link_hash_table structures. */
778 enum elf_target_id target_id
;
780 /* The ELF machine code (EM_xxxx) for this backend. */
781 int elf_machine_code
;
786 /* The maximum page size for this backend. */
789 /* The minimum page size for this backend. An input object will not be
790 considered page aligned unless its sections are correctly aligned for
791 pages at least this large. May be smaller than maxpagesize. */
794 /* The common page size for this backend. */
795 bfd_vma commonpagesize
;
797 /* The BFD flags applied to sections created for dynamic linking. */
798 flagword dynamic_sec_flags
;
800 /* Architecture-specific data for this backend.
801 This is actually a pointer to some type like struct elf_ARCH_data. */
802 const void *arch_data
;
804 /* A function to translate an ELF RELA relocation to a BFD arelent
806 void (*elf_info_to_howto
)
807 (bfd
*, arelent
*, Elf_Internal_Rela
*);
809 /* A function to translate an ELF REL relocation to a BFD arelent
811 void (*elf_info_to_howto_rel
)
812 (bfd
*, arelent
*, Elf_Internal_Rela
*);
814 /* A function to determine whether a symbol is global when
815 partitioning the symbol table into local and global symbols.
816 This should be NULL for most targets, in which case the correct
817 thing will be done. MIPS ELF, at least on the Irix 5, has
818 special requirements. */
819 bfd_boolean (*elf_backend_sym_is_global
)
822 /* The remaining functions are hooks which are called only if they
825 /* A function to permit a backend specific check on whether a
826 particular BFD format is relevant for an object file, and to
827 permit the backend to set any global information it wishes. When
828 this is called elf_elfheader is set, but anything else should be
829 used with caution. If this returns FALSE, the check_format
830 routine will return a bfd_error_wrong_format error. */
831 bfd_boolean (*elf_backend_object_p
)
834 /* A function to do additional symbol processing when reading the
835 ELF symbol table. This is where any processor-specific special
836 section indices are handled. */
837 void (*elf_backend_symbol_processing
)
840 /* A function to do additional symbol processing after reading the
841 entire ELF symbol table. */
842 bfd_boolean (*elf_backend_symbol_table_processing
)
843 (bfd
*, elf_symbol_type
*, unsigned int);
845 /* A function to set the type of the info field. Processor-specific
846 types should be handled here. */
847 int (*elf_backend_get_symbol_type
)
848 (Elf_Internal_Sym
*, int);
850 /* A function to return the linker hash table entry of a symbol that
851 might be satisfied by an archive symbol. */
852 struct elf_link_hash_entry
* (*elf_backend_archive_symbol_lookup
)
853 (bfd
*, struct bfd_link_info
*, const char *);
855 /* Return true if local section symbols should have a non-null st_name.
856 NULL implies false. */
857 bfd_boolean (*elf_backend_name_local_section_symbols
)
860 /* A function to do additional processing on the ELF section header
861 just before writing it out. This is used to set the flags and
862 type fields for some sections, or to actually write out data for
864 bfd_boolean (*elf_backend_section_processing
)
865 (bfd
*, Elf_Internal_Shdr
*);
867 /* A function to handle unusual section types when creating BFD
868 sections from ELF sections. */
869 bfd_boolean (*elf_backend_section_from_shdr
)
870 (bfd
*, Elf_Internal_Shdr
*, const char *, int);
872 /* A function to convert machine dependent ELF section header flags to
873 BFD internal section header flags. */
874 bfd_boolean (*elf_backend_section_flags
)
875 (flagword
*, const Elf_Internal_Shdr
*);
877 /* A function that returns a struct containing ELF section flags and
878 type for the given BFD section. */
879 const struct bfd_elf_special_section
* (*get_sec_type_attr
)
882 /* A function to handle unusual program segment types when creating BFD
883 sections from ELF program segments. */
884 bfd_boolean (*elf_backend_section_from_phdr
)
885 (bfd
*, Elf_Internal_Phdr
*, int, const char *);
887 /* A function to set up the ELF section header for a BFD section in
888 preparation for writing it out. This is where the flags and type
889 fields are set for unusual sections. */
890 bfd_boolean (*elf_backend_fake_sections
)
891 (bfd
*, Elf_Internal_Shdr
*, asection
*);
893 /* A function to get the ELF section index for a BFD section. If
894 this returns TRUE, the section was found. If it is a normal ELF
895 section, *RETVAL should be left unchanged. If it is not a normal
896 ELF section *RETVAL should be set to the SHN_xxxx index. */
897 bfd_boolean (*elf_backend_section_from_bfd_section
)
898 (bfd
*, asection
*, int *retval
);
900 /* If this field is not NULL, it is called by the add_symbols phase
901 of a link just before adding a symbol to the global linker hash
902 table. It may modify any of the fields as it wishes. If *NAME
903 is set to NULL, the symbol will be skipped rather than being
904 added to the hash table. This function is responsible for
905 handling all processor dependent symbol bindings and section
906 indices, and must set at least *FLAGS and *SEC for each processor
907 dependent case; failure to do so will cause a link error. */
908 bfd_boolean (*elf_add_symbol_hook
)
909 (bfd
*abfd
, struct bfd_link_info
*info
, Elf_Internal_Sym
*,
910 const char **name
, flagword
*flags
, asection
**sec
, bfd_vma
*value
);
912 /* If this field is not NULL, it is called by the elf_link_output_sym
913 phase of a link for each symbol which will appear in the object file.
914 On error, this function returns 0. 1 is returned when the symbol
915 should be output, 2 is returned when the symbol should be discarded. */
916 int (*elf_backend_link_output_symbol_hook
)
917 (struct bfd_link_info
*info
, const char *, Elf_Internal_Sym
*,
918 asection
*, struct elf_link_hash_entry
*);
920 /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend
921 linker the first time it encounters a dynamic object in the link.
922 This function must create any sections required for dynamic
923 linking. The ABFD argument is a dynamic object. The .interp,
924 .dynamic, .dynsym, .dynstr, and .hash functions have already been
925 created, and this function may modify the section flags if
926 desired. This function will normally create the .got and .plt
927 sections, but different backends have different requirements. */
928 bfd_boolean (*elf_backend_create_dynamic_sections
)
929 (bfd
*abfd
, struct bfd_link_info
*info
);
931 /* When creating a shared library, determine whether to omit the
932 dynamic symbol for the section. */
933 bfd_boolean (*elf_backend_omit_section_dynsym
)
934 (bfd
*output_bfd
, struct bfd_link_info
*info
, asection
*osec
);
936 /* Return TRUE if relocations of targets are compatible to the extent
937 that CHECK_RELOCS will properly process them. PR 4424. */
938 bfd_boolean (*relocs_compatible
) (const bfd_target
*, const bfd_target
*);
940 /* The CHECK_RELOCS function is called by the add_symbols phase of
941 the ELF backend linker. It is called once for each section with
942 relocs of an object file, just after the symbols for the object
943 file have been added to the global linker hash table. The
944 function must look through the relocs and do any special handling
945 required. This generally means allocating space in the global
946 offset table, and perhaps allocating space for a reloc. The
947 relocs are always passed as Rela structures; if the section
948 actually uses Rel structures, the r_addend field will always be
950 bfd_boolean (*check_relocs
)
951 (bfd
*abfd
, struct bfd_link_info
*info
, asection
*o
,
952 const Elf_Internal_Rela
*relocs
);
954 /* The CHECK_DIRECTIVES function is called once per input file by
955 the add_symbols phase of the ELF backend linker. The function
956 must inspect the bfd and create any additional symbols according
957 to any custom directives in the bfd. */
958 bfd_boolean (*check_directives
)
959 (bfd
*abfd
, struct bfd_link_info
*info
);
961 /* The NOTICE_AS_NEEDED function is called as the linker is about to
962 handle an as-needed lib (ACT = notice_as_needed), and after the
963 linker has decided to keep the lib (ACT = notice_needed) or when
964 the lib is not needed (ACT = notice_not_needed). */
965 bfd_boolean (*notice_as_needed
)
966 (bfd
*abfd
, struct bfd_link_info
*info
, enum notice_asneeded_action act
);
968 /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
969 linker for every symbol which is defined by a dynamic object and
970 referenced by a regular object. This is called after all the
971 input files have been seen, but before the SIZE_DYNAMIC_SECTIONS
972 function has been called. The hash table entry should be
973 bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be
974 defined in a section from a dynamic object. Dynamic object
975 sections are not included in the final link, and this function is
976 responsible for changing the value to something which the rest of
977 the link can deal with. This will normally involve adding an
978 entry to the .plt or .got or some such section, and setting the
979 symbol to point to that. */
980 bfd_boolean (*elf_backend_adjust_dynamic_symbol
)
981 (struct bfd_link_info
*info
, struct elf_link_hash_entry
*h
);
983 /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker
984 after all the linker input files have been seen but before the
985 section sizes have been set. This is called after
986 ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS. */
987 bfd_boolean (*elf_backend_always_size_sections
)
988 (bfd
*output_bfd
, struct bfd_link_info
*info
);
990 /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend
991 linker after all the linker input files have been seen but before
992 the sections sizes have been set. This is called after
993 ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols.
994 It is only called when linking against a dynamic object. It must
995 set the sizes of the dynamic sections, and may fill in their
996 contents as well. The generic ELF linker can handle the .dynsym,
997 .dynstr and .hash sections. This function must handle the
998 .interp section and any sections created by the
999 CREATE_DYNAMIC_SECTIONS entry point. */
1000 bfd_boolean (*elf_backend_size_dynamic_sections
)
1001 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1003 /* Set TEXT_INDEX_SECTION and DATA_INDEX_SECTION, the output sections
1004 we keep to use as a base for relocs and symbols. */
1005 void (*elf_backend_init_index_section
)
1006 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1008 /* The RELOCATE_SECTION function is called by the ELF backend linker
1009 to handle the relocations for a section.
1011 The relocs are always passed as Rela structures; if the section
1012 actually uses Rel structures, the r_addend field will always be
1015 This function is responsible for adjust the section contents as
1016 necessary, and (if using Rela relocs and generating a
1017 relocatable output file) adjusting the reloc addend as
1020 This function does not have to worry about setting the reloc
1021 address or the reloc symbol index.
1023 LOCAL_SYMS is a pointer to the swapped in local symbols.
1025 LOCAL_SECTIONS is an array giving the section in the input file
1026 corresponding to the st_shndx field of each local symbol.
1028 The global hash table entry for the global symbols can be found
1029 via elf_sym_hashes (input_bfd).
1031 When generating relocatable output, this function must handle
1032 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
1033 going to be the section symbol corresponding to the output
1034 section, which means that the addend must be adjusted
1037 Returns FALSE on error, TRUE on success, 2 if successful and
1038 relocations should be written for this section. */
1039 int (*elf_backend_relocate_section
)
1040 (bfd
*output_bfd
, struct bfd_link_info
*info
, bfd
*input_bfd
,
1041 asection
*input_section
, bfd_byte
*contents
, Elf_Internal_Rela
*relocs
,
1042 Elf_Internal_Sym
*local_syms
, asection
**local_sections
);
1044 /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend
1045 linker just before it writes a symbol out to the .dynsym section.
1046 The processor backend may make any required adjustment to the
1047 symbol. It may also take the opportunity to set contents of the
1048 dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on
1049 all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called
1050 on those symbols which are defined by a dynamic object. */
1051 bfd_boolean (*elf_backend_finish_dynamic_symbol
)
1052 (bfd
*output_bfd
, struct bfd_link_info
*info
,
1053 struct elf_link_hash_entry
*h
, Elf_Internal_Sym
*sym
);
1055 /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend
1056 linker just before it writes all the dynamic sections out to the
1057 output file. The FINISH_DYNAMIC_SYMBOL will have been called on
1058 all dynamic symbols. */
1059 bfd_boolean (*elf_backend_finish_dynamic_sections
)
1060 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1062 /* A function to do any beginning processing needed for the ELF file
1063 before building the ELF headers and computing file positions. */
1064 void (*elf_backend_begin_write_processing
)
1065 (bfd
*, struct bfd_link_info
*);
1067 /* A function to do any final processing needed for the ELF file
1068 before writing it out. The LINKER argument is TRUE if this BFD
1069 was created by the ELF backend linker. */
1070 void (*elf_backend_final_write_processing
)
1071 (bfd
*, bfd_boolean linker
);
1073 /* This function is called by get_program_header_size. It should
1074 return the number of additional program segments which this BFD
1075 will need. It should return -1 on error. */
1076 int (*elf_backend_additional_program_headers
)
1077 (bfd
*, struct bfd_link_info
*);
1079 /* This function is called to modify an existing segment map in a
1080 backend specific fashion. */
1081 bfd_boolean (*elf_backend_modify_segment_map
)
1082 (bfd
*, struct bfd_link_info
*);
1084 /* This function is called to modify program headers just before
1085 they are written. */
1086 bfd_boolean (*elf_backend_modify_program_headers
)
1087 (bfd
*, struct bfd_link_info
*);
1089 /* This function is called to see if the PHDR header should be
1090 checked for validity. */
1091 bfd_boolean (*elf_backend_allow_non_load_phdr
)
1092 (bfd
*, const Elf_Internal_Phdr
*, unsigned);
1094 /* This function is called before section garbage collection to
1095 mark entry symbol sections. */
1097 (struct bfd_link_info
*);
1099 /* This function is called during section garbage collection to
1100 mark sections that define global symbols. */
1101 bfd_boolean (*gc_mark_dynamic_ref
)
1102 (struct elf_link_hash_entry
*, void *);
1104 /* This function is called during section gc to discover the section a
1105 particular relocation refers to. */
1106 elf_gc_mark_hook_fn gc_mark_hook
;
1108 /* This function, if defined, is called after the first gc marking pass
1109 to allow the backend to mark additional sections. */
1110 bfd_boolean (*gc_mark_extra_sections
)
1111 (struct bfd_link_info
*, elf_gc_mark_hook_fn
);
1113 /* This function, if defined, is called during the sweep phase of gc
1114 in order that a backend might update any data structures it might
1116 bfd_boolean (*gc_sweep_hook
)
1117 (bfd
*, struct bfd_link_info
*, asection
*, const Elf_Internal_Rela
*);
1119 /* This function, if defined, is called after the ELF headers have
1120 been created. This allows for things like the OS and ABI versions
1122 void (*elf_backend_post_process_headers
)
1123 (bfd
*, struct bfd_link_info
*);
1125 /* This function, if defined, prints a symbol to file and returns the
1126 name of the symbol to be printed. It should return NULL to fall
1127 back to default symbol printing. */
1128 const char *(*elf_backend_print_symbol_all
)
1129 (bfd
*, void *, asymbol
*);
1131 /* This function, if defined, is called after all local symbols and
1132 global symbols converted to locals are emitted into the symtab
1133 section. It allows the backend to emit special local symbols
1134 not handled in the hash table. */
1135 bfd_boolean (*elf_backend_output_arch_local_syms
)
1136 (bfd
*, struct bfd_link_info
*, void *,
1137 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym
*, asection
*,
1138 struct elf_link_hash_entry
*));
1140 /* This function, if defined, is called after all symbols are emitted
1141 into the symtab section. It allows the backend to emit special
1142 global symbols not handled in the hash table. */
1143 bfd_boolean (*elf_backend_output_arch_syms
)
1144 (bfd
*, struct bfd_link_info
*, void *,
1145 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym
*, asection
*,
1146 struct elf_link_hash_entry
*));
1148 /* Filter what symbols of the output file to include in the import
1149 library if one is created. */
1150 unsigned int (*elf_backend_filter_implib_symbols
)
1151 (bfd
*, struct bfd_link_info
*, asymbol
**, long);
1153 /* Copy any information related to dynamic linking from a pre-existing
1154 symbol to a newly created symbol. Also called to copy flags and
1155 other back-end info to a weakdef, in which case the symbol is not
1156 newly created and plt/got refcounts and dynamic indices should not
1158 void (*elf_backend_copy_indirect_symbol
)
1159 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
1160 struct elf_link_hash_entry
*);
1162 /* Modify any information related to dynamic linking such that the
1163 symbol is not exported. */
1164 void (*elf_backend_hide_symbol
)
1165 (struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd_boolean
);
1167 /* A function to do additional symbol fixup, called by
1168 _bfd_elf_fix_symbol_flags. */
1169 bfd_boolean (*elf_backend_fixup_symbol
)
1170 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
1172 /* Merge the backend specific symbol attribute. */
1173 void (*elf_backend_merge_symbol_attribute
)
1174 (struct elf_link_hash_entry
*, const Elf_Internal_Sym
*, bfd_boolean
,
1177 /* This function, if defined, will return a string containing the
1178 name of a target-specific dynamic tag. */
1179 char *(*elf_backend_get_target_dtag
)
1182 /* Decide whether an undefined symbol is special and can be ignored.
1183 This is the case for OPTIONAL symbols on IRIX. */
1184 bfd_boolean (*elf_backend_ignore_undef_symbol
)
1185 (struct elf_link_hash_entry
*);
1187 /* Emit relocations. Overrides default routine for emitting relocs,
1188 except during a relocatable link, or if all relocs are being emitted. */
1189 bfd_boolean (*elf_backend_emit_relocs
)
1190 (bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*,
1191 struct elf_link_hash_entry
**);
1193 /* Update relocations. It is allowed to change the number and the order.
1194 In such a case hashes should be invalidated. */
1195 void (*elf_backend_update_relocs
)
1196 (asection
*, struct bfd_elf_section_reloc_data
*);
1198 /* Count relocations. Not called for relocatable links
1199 or if all relocs are being preserved in the output. */
1200 unsigned int (*elf_backend_count_relocs
)
1201 (struct bfd_link_info
*, asection
*);
1203 /* Count additionals relocations. Called for relocatable links if
1204 additional relocations needs to be created. */
1205 unsigned int (*elf_backend_count_additional_relocs
)
1208 /* Say whether to sort relocs output by ld -r and ld --emit-relocs,
1209 by r_offset. If NULL, default to true. */
1210 bfd_boolean (*sort_relocs_p
)
1213 /* This function, if defined, is called when an NT_PRSTATUS note is found
1215 bfd_boolean (*elf_backend_grok_prstatus
)
1216 (bfd
*, Elf_Internal_Note
*);
1218 /* This function, if defined, is called when an NT_PSINFO or NT_PRPSINFO
1219 note is found in a core file. */
1220 bfd_boolean (*elf_backend_grok_psinfo
)
1221 (bfd
*, Elf_Internal_Note
*);
1223 /* This function, if defined, is called to write a note to a corefile. */
1224 char *(*elf_backend_write_core_note
)
1225 (bfd
*abfd
, char *buf
, int *bufsiz
, int note_type
, ...);
1227 /* This function, if defined, is called to convert target-specific
1228 section flag names into hex values. */
1229 flagword (*elf_backend_lookup_section_flags_hook
)
1232 /* This function returns class of a reloc type. */
1233 enum elf_reloc_type_class (*elf_backend_reloc_type_class
)
1234 (const struct bfd_link_info
*, const asection
*, const Elf_Internal_Rela
*);
1236 /* This function, if defined, removes information about discarded functions
1237 from other sections which mention them. */
1238 bfd_boolean (*elf_backend_discard_info
)
1239 (bfd
*, struct elf_reloc_cookie
*, struct bfd_link_info
*);
1241 /* This function, if defined, signals that the function above has removed
1242 the discarded relocations for this section. */
1243 bfd_boolean (*elf_backend_ignore_discarded_relocs
)
1246 /* What to do when ld finds relocations against symbols defined in
1247 discarded sections. */
1248 unsigned int (*action_discarded
)
1251 /* This function returns the width of FDE pointers in bytes, or 0 if
1252 that can't be determined for some reason. The default definition
1253 goes by the bfd's EI_CLASS. */
1254 unsigned int (*elf_backend_eh_frame_address_size
)
1255 (bfd
*, asection
*);
1257 /* These functions tell elf-eh-frame whether to attempt to turn
1258 absolute or lsda encodings into pc-relative ones. The default
1259 definition enables these transformations. */
1260 bfd_boolean (*elf_backend_can_make_relative_eh_frame
)
1261 (bfd
*, struct bfd_link_info
*, asection
*);
1262 bfd_boolean (*elf_backend_can_make_lsda_relative_eh_frame
)
1263 (bfd
*, struct bfd_link_info
*, asection
*);
1265 /* This function returns an encoding after computing the encoded
1266 value (and storing it in ENCODED) for the given OFFSET into OSEC,
1267 to be stored in at LOC_OFFSET into the LOC_SEC input section.
1268 The default definition chooses a 32-bit PC-relative encoding. */
1269 bfd_byte (*elf_backend_encode_eh_address
)
1270 (bfd
*abfd
, struct bfd_link_info
*info
,
1271 asection
*osec
, bfd_vma offset
,
1272 asection
*loc_sec
, bfd_vma loc_offset
,
1275 /* This function, if defined, may write out the given section.
1276 Returns TRUE if it did so and FALSE if the caller should. */
1277 bfd_boolean (*elf_backend_write_section
)
1278 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
1280 /* The level of IRIX compatibility we're striving for.
1281 MIPS ELF specific function. */
1282 irix_compat_t (*elf_backend_mips_irix_compat
)
1285 reloc_howto_type
*(*elf_backend_mips_rtype_to_howto
)
1286 (unsigned int, bfd_boolean
);
1288 /* The swapping table to use when dealing with ECOFF information.
1289 Used for the MIPS ELF .mdebug section. */
1290 const struct ecoff_debug_swap
*elf_backend_ecoff_debug_swap
;
1292 /* This function implements `bfd_elf_bfd_from_remote_memory';
1293 see elf.c, elfcode.h. */
1294 bfd
*(*elf_backend_bfd_from_remote_memory
)
1295 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
1296 int (*target_read_memory
) (bfd_vma vma
, bfd_byte
*myaddr
,
1297 bfd_size_type len
));
1299 /* This function is used by `_bfd_elf_get_synthetic_symtab';
1301 bfd_vma (*plt_sym_val
) (bfd_vma
, const asection
*, const arelent
*);
1303 /* Is symbol defined in common section? */
1304 bfd_boolean (*common_definition
) (Elf_Internal_Sym
*);
1306 /* Return a common section index for section. */
1307 unsigned int (*common_section_index
) (asection
*);
1309 /* Return a common section for section. */
1310 asection
*(*common_section
) (asection
*);
1312 /* Return TRUE if we can merge 2 definitions. */
1313 bfd_boolean (*merge_symbol
) (struct elf_link_hash_entry
*,
1314 const Elf_Internal_Sym
*, asection
**,
1315 bfd_boolean
, bfd_boolean
,
1316 bfd
*, const asection
*);
1318 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
1319 bfd_boolean (*elf_hash_symbol
) (struct elf_link_hash_entry
*);
1321 /* Return TRUE if type is a function symbol type. */
1322 bfd_boolean (*is_function_type
) (unsigned int type
);
1324 /* If the ELF symbol SYM might be a function in SEC, return the
1325 function size and set *CODE_OFF to the function's entry point,
1326 otherwise return zero. */
1327 bfd_size_type (*maybe_function_sym
) (const asymbol
*sym
, asection
*sec
,
1330 /* Return the section which RELOC_SEC applies to. */
1331 asection
*(*get_reloc_section
) (asection
*reloc_sec
);
1333 /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
1334 has a type >= SHT_LOOS. Returns TRUE if the fields were initialised,
1335 FALSE otherwise. Can be called multiple times for a given section,
1336 until it returns TRUE. Most of the times it is called ISECTION will be
1337 set to an input section that might be associated with the output section.
1338 The last time that it is called, ISECTION will be set to NULL. */
1339 bfd_boolean (*elf_backend_copy_special_section_fields
)
1340 (const bfd
*ibfd
, bfd
*obfd
, const Elf_Internal_Shdr
*isection
,
1341 Elf_Internal_Shdr
*osection
);
1343 /* Used to handle bad SHF_LINK_ORDER input. */
1344 void (*link_order_error_handler
) (const char *, ...);
1346 /* Name of the PLT relocation section. */
1347 const char *relplt_name
;
1349 /* Alternate EM_xxxx machine codes for this backend. */
1350 int elf_machine_alt1
;
1351 int elf_machine_alt2
;
1353 const struct elf_size_info
*s
;
1355 /* An array of target specific special sections. */
1356 const struct bfd_elf_special_section
*special_sections
;
1358 /* The size in bytes of the header for the GOT. This includes the
1359 so-called reserved entries on some systems. */
1360 bfd_vma got_header_size
;
1362 /* The size of the GOT entry for the symbol pointed to by H if non-NULL,
1363 otherwise by the local symbol with index SYMNDX in IBFD. */
1364 bfd_vma (*got_elt_size
) (bfd
*, struct bfd_link_info
*,
1365 struct elf_link_hash_entry
*h
,
1366 bfd
*ibfd
, unsigned long symndx
);
1368 /* The vendor name to use for a processor-standard attributes section. */
1369 const char *obj_attrs_vendor
;
1371 /* The section name to use for a processor-standard attributes section. */
1372 const char *obj_attrs_section
;
1374 /* Return 1, 2 or 3 to indicate what type of arguments a
1375 processor-specific tag takes. */
1376 int (*obj_attrs_arg_type
) (int);
1378 /* The section type to use for an attributes section. */
1379 unsigned int obj_attrs_section_type
;
1381 /* This function determines the order in which any attributes are
1382 written. It must be defined for input in the range
1383 LEAST_KNOWN_OBJ_ATTRIBUTE..NUM_KNOWN_OBJ_ATTRIBUTES-1 (this range
1384 is used in order to make unity easy). The returned value is the
1385 actual tag number to place in the input position. */
1386 int (*obj_attrs_order
) (int);
1388 /* Handle merging unknown attributes; either warn and return TRUE,
1389 or give an error and return FALSE. */
1390 bfd_boolean (*obj_attrs_handle_unknown
) (bfd
*, int);
1392 /* Encoding used for compact EH tables. */
1393 int (*compact_eh_encoding
) (struct bfd_link_info
*);
1395 /* Opcode representing no unwind. */
1396 int (*cant_unwind_opcode
) (struct bfd_link_info
*);
1398 /* This is non-zero if static TLS segments require a special alignment. */
1399 unsigned static_tls_alignment
;
1401 /* Alignment for the PT_GNU_STACK segment. */
1402 unsigned stack_align
;
1404 /* Flag bits to assign to a section of type SHT_STRTAB. */
1405 unsigned long elf_strtab_flags
;
1407 /* This is TRUE if the linker should act like collect and gather
1408 global constructors and destructors by name. This is TRUE for
1409 MIPS ELF because the Irix 5 tools can not handle the .init
1411 unsigned collect
: 1;
1413 /* This is TRUE if the linker should ignore changes to the type of a
1414 symbol. This is TRUE for MIPS ELF because some Irix 5 objects
1415 record undefined functions as STT_OBJECT although the definitions
1417 unsigned type_change_ok
: 1;
1419 /* Whether the backend may use REL relocations. (Some backends use
1420 both REL and RELA relocations, and this flag is set for those
1422 unsigned may_use_rel_p
: 1;
1424 /* Whether the backend may use RELA relocations. (Some backends use
1425 both REL and RELA relocations, and this flag is set for those
1427 unsigned may_use_rela_p
: 1;
1429 /* Whether the default relocation type is RELA. If a backend with
1430 this flag set wants REL relocations for a particular section,
1431 it must note that explicitly. Similarly, if this flag is clear,
1432 and the backend wants RELA relocations for a particular
1434 unsigned default_use_rela_p
: 1;
1436 /* True if PLT and copy relocations should be RELA by default. */
1437 unsigned rela_plts_and_copies_p
: 1;
1439 /* Set if RELA relocations for a relocatable link can be handled by
1440 generic code. Backends that set this flag need do nothing in the
1441 backend relocate_section routine for relocatable linking. */
1442 unsigned rela_normal
: 1;
1444 /* Set if DT_REL/DT_RELA/DT_RELSZ/DT_RELASZ should not include PLT
1446 unsigned dtrel_excludes_plt
: 1;
1448 /* TRUE if addresses "naturally" sign extend. This is used when
1449 swapping in from Elf32 when BFD64. */
1450 unsigned sign_extend_vma
: 1;
1452 unsigned want_got_plt
: 1;
1453 unsigned plt_readonly
: 1;
1454 unsigned want_plt_sym
: 1;
1455 unsigned plt_not_loaded
: 1;
1456 unsigned plt_alignment
: 4;
1457 unsigned can_gc_sections
: 1;
1458 unsigned can_refcount
: 1;
1459 unsigned want_got_sym
: 1;
1460 unsigned want_dynbss
: 1;
1461 unsigned want_dynrelro
: 1;
1463 /* Targets which do not support physical addressing often require
1464 that the p_paddr field in the section header to be set to zero.
1465 This field indicates whether this behavior is required. */
1466 unsigned want_p_paddr_set_to_zero
: 1;
1468 /* Target has broken hardware and/or kernel that requires pages not
1469 to be mapped twice with different permissions. */
1470 unsigned no_page_alias
: 1;
1472 /* True if an object file lacking a .note.GNU-stack section
1473 should be assumed to be requesting exec stack. At least one
1474 other file in the link needs to have a .note.GNU-stack section
1475 for a PT_GNU_STACK segment to be created. */
1476 unsigned default_execstack
: 1;
1478 /* True if elf_section_data(sec)->this_hdr.contents is sec->rawsize
1479 in length rather than sec->size in length, if sec->rawsize is
1480 non-zero and smaller than sec->size. */
1481 unsigned caches_rawsize
: 1;
1483 /* Address of protected data defined in the shared library may be
1484 external, i.e., due to copy relocation. */
1485 unsigned extern_protected_data
: 1;
1488 /* Information about reloc sections associated with a bfd_elf_section_data
1490 struct bfd_elf_section_reloc_data
1492 /* The ELF header for the reloc section associated with this
1494 Elf_Internal_Shdr
*hdr
;
1495 /* The number of relocations currently assigned to HDR. */
1497 /* The ELF section number of the reloc section. Only used for an
1500 /* Used by the backend linker to store the symbol hash table entries
1501 associated with relocs against global symbols. */
1502 struct elf_link_hash_entry
**hashes
;
1505 /* Information stored for each BFD section in an ELF file. This
1506 structure is allocated by elf_new_section_hook. */
1508 struct bfd_elf_section_data
1510 /* The ELF header for this section. */
1511 Elf_Internal_Shdr this_hdr
;
1513 /* INPUT_SECTION_FLAGS if specified in the linker script. */
1514 struct flag_info
*section_flag_info
;
1516 /* Information about the REL and RELA reloc sections associated
1517 with this section, if any. */
1518 struct bfd_elf_section_reloc_data rel
, rela
;
1520 /* The ELF section number of this section. */
1523 /* Used by the backend linker when generating a shared library to
1524 record the dynamic symbol index for a section symbol
1525 corresponding to this section. A value of 0 means that there is
1526 no dynamic symbol for this section. */
1529 /* A pointer to the linked-to section for SHF_LINK_ORDER. */
1530 asection
*linked_to
;
1532 /* A pointer to the swapped relocs. If the section uses REL relocs,
1533 rather than RELA, all the r_addend fields will be zero. This
1534 pointer may be NULL. It is used by the backend linker. */
1535 Elf_Internal_Rela
*relocs
;
1537 /* A pointer to a linked list tracking dynamic relocs copied for
1541 /* A pointer to the bfd section used for dynamic relocs. */
1545 /* Group name, if this section is a member of a group. */
1548 /* Group signature sym, if this is the SHT_GROUP section. */
1549 struct bfd_symbol
*id
;
1552 /* For a member of a group, points to the SHT_GROUP section.
1553 NULL for the SHT_GROUP section itself and non-group sections. */
1554 asection
*sec_group
;
1556 /* A linked list of member sections in the group. Circular when used by
1557 the linker. For the SHT_GROUP section, points at first member. */
1558 asection
*next_in_group
;
1560 /* The FDEs associated with this section. The u.fde.next_in_section
1561 field acts as a chain pointer. */
1562 struct eh_cie_fde
*fde_list
;
1564 /* Link from a text section to its .eh_frame_entry section. */
1565 asection
*eh_frame_entry
;
1567 /* A pointer used for various section optimizations. */
1571 #define elf_section_data(sec) ((struct bfd_elf_section_data*)(sec)->used_by_bfd)
1572 #define elf_linked_to_section(sec) (elf_section_data(sec)->linked_to)
1573 #define elf_section_type(sec) (elf_section_data(sec)->this_hdr.sh_type)
1574 #define elf_section_flags(sec) (elf_section_data(sec)->this_hdr.sh_flags)
1575 #define elf_group_name(sec) (elf_section_data(sec)->group.name)
1576 #define elf_group_id(sec) (elf_section_data(sec)->group.id)
1577 #define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group)
1578 #define elf_fde_list(sec) (elf_section_data(sec)->fde_list)
1579 #define elf_sec_group(sec) (elf_section_data(sec)->sec_group)
1580 #define elf_section_eh_frame_entry(sec) (elf_section_data(sec)->eh_frame_entry)
1582 #define xvec_get_elf_backend_data(xvec) \
1583 ((const struct elf_backend_data *) (xvec)->backend_data)
1585 #define get_elf_backend_data(abfd) \
1586 xvec_get_elf_backend_data ((abfd)->xvec)
1588 /* The least object attributes (within an attributes subsection) known
1589 for any target. Some code assumes that the value 0 is not used and
1590 the field for that attribute can instead be used as a marker to
1591 indicate that attributes have been initialized. */
1592 #define LEAST_KNOWN_OBJ_ATTRIBUTE 2
1594 /* The maximum number of known object attributes for any target. */
1595 #define NUM_KNOWN_OBJ_ATTRIBUTES 71
1597 /* The value of an object attribute. The type indicates whether the attribute
1598 holds and integer, a string, or both. It can also indicate that there can
1599 be no default (i.e. all values must be written to file, even zero). */
1601 typedef struct obj_attribute
1603 #define ATTR_TYPE_FLAG_INT_VAL (1 << 0)
1604 #define ATTR_TYPE_FLAG_STR_VAL (1 << 1)
1605 #define ATTR_TYPE_FLAG_NO_DEFAULT (1 << 2)
1607 #define ATTR_TYPE_HAS_INT_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_INT_VAL)
1608 #define ATTR_TYPE_HAS_STR_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_STR_VAL)
1609 #define ATTR_TYPE_HAS_NO_DEFAULT(TYPE) ((TYPE) & ATTR_TYPE_FLAG_NO_DEFAULT)
1616 typedef struct obj_attribute_list
1618 struct obj_attribute_list
*next
;
1621 } obj_attribute_list
;
1623 /* Object attributes may either be defined by the processor ABI, index
1624 OBJ_ATTR_PROC in the *_obj_attributes arrays, or be GNU-specific
1625 (and possibly also processor-specific), index OBJ_ATTR_GNU. */
1626 #define OBJ_ATTR_PROC 0
1627 #define OBJ_ATTR_GNU 1
1628 #define OBJ_ATTR_FIRST OBJ_ATTR_PROC
1629 #define OBJ_ATTR_LAST OBJ_ATTR_GNU
1631 /* The following object attribute tags are taken as generic, for all
1632 targets and for "gnu" where there is no target standard. */
1639 Tag_compatibility
= 32
1642 /* The following struct stores information about every SystemTap section
1643 found in the object file. */
1646 struct sdt_note
*next
;
1651 /* tdata information grabbed from an elf core file. */
1652 struct core_elf_obj_tdata
1661 /* Extra tdata information held for output ELF BFDs. */
1662 struct output_elf_obj_tdata
1664 struct elf_segment_map
*seg_map
;
1665 struct elf_strtab_hash
*strtab_ptr
;
1667 /* STT_SECTION symbols for each section */
1668 asymbol
**section_syms
;
1670 /* Used to determine if PT_GNU_EH_FRAME segment header should be
1672 asection
*eh_frame_hdr
;
1674 /* NT_GNU_BUILD_ID note type info. */
1677 bfd_boolean (*after_write_object_contents
) (bfd
*);
1682 /* Records the result of `get_program_header_size'. */
1683 bfd_size_type program_header_size
;
1685 /* Used when laying out sections. */
1686 file_ptr next_file_pos
;
1688 int num_section_syms
;
1689 unsigned int shstrtab_section
, strtab_section
;
1691 /* Segment flags for the PT_GNU_STACK segment. */
1692 unsigned int stack_flags
;
1694 /* This is set to TRUE if the object was created by the backend
1698 /* Used to determine if the e_flags field has been initialized */
1699 bfd_boolean flags_init
;
1702 /* Indicate if the bfd contains symbols that have the STT_GNU_IFUNC
1703 symbol type or STB_GNU_UNIQUE binding. Used to set the osabi
1704 field in the ELF header structure. */
1705 enum elf_gnu_symbols
1707 elf_gnu_symbol_none
= 0,
1708 elf_gnu_symbol_any
= 1 << 0,
1709 elf_gnu_symbol_ifunc
= (elf_gnu_symbol_any
| 1 << 1),
1710 elf_gnu_symbol_unique
= (elf_gnu_symbol_any
| 1 << 2),
1711 elf_gnu_symbol_all
= (elf_gnu_symbol_ifunc
| elf_gnu_symbol_unique
)
1714 typedef struct elf_section_list
1716 Elf_Internal_Shdr hdr
;
1718 struct elf_section_list
* next
;
1721 /* Some private data is stashed away for future use using the tdata pointer
1722 in the bfd structure. */
1724 struct elf_obj_tdata
1726 Elf_Internal_Ehdr elf_header
[1]; /* Actual data, but ref like ptr */
1727 Elf_Internal_Shdr
**elf_sect_ptr
;
1728 Elf_Internal_Phdr
*phdr
;
1729 Elf_Internal_Shdr symtab_hdr
;
1730 Elf_Internal_Shdr shstrtab_hdr
;
1731 Elf_Internal_Shdr strtab_hdr
;
1732 Elf_Internal_Shdr dynsymtab_hdr
;
1733 Elf_Internal_Shdr dynstrtab_hdr
;
1734 Elf_Internal_Shdr dynversym_hdr
;
1735 Elf_Internal_Shdr dynverref_hdr
;
1736 Elf_Internal_Shdr dynverdef_hdr
;
1737 elf_section_list
* symtab_shndx_list
;
1738 bfd_vma gp
; /* The gp value */
1739 unsigned int gp_size
; /* The gp size */
1740 unsigned int num_elf_sections
; /* elf_sect_ptr size */
1742 /* A mapping from external symbols to entries in the linker hash
1743 table, used when linking. This is indexed by the symbol index
1744 minus the sh_info field of the symbol table header. */
1745 struct elf_link_hash_entry
**sym_hashes
;
1747 /* Track usage and final offsets of GOT entries for local symbols.
1748 This array is indexed by symbol index. Elements are used
1749 identically to "got" in struct elf_link_hash_entry. */
1752 bfd_signed_vma
*refcounts
;
1754 struct got_entry
**ents
;
1757 /* The linker ELF emulation code needs to let the backend ELF linker
1758 know what filename should be used for a dynamic object if the
1759 dynamic object is found using a search. The emulation code then
1760 sometimes needs to know what name was actually used. Until the
1761 file has been added to the linker symbol table, this field holds
1762 the name the linker wants. After it has been added, it holds the
1763 name actually used, which will be the DT_SONAME entry if there is
1765 const char *dt_name
;
1767 /* The linker emulation needs to know what audit libs
1768 are used by a dynamic object. */
1769 const char *dt_audit
;
1771 /* Used by find_nearest_line entry point. */
1774 /* A place to stash dwarf1 info for this bfd. */
1775 struct dwarf1_debug
*dwarf1_find_line_info
;
1777 /* A place to stash dwarf2 info for this bfd. */
1778 void *dwarf2_find_line_info
;
1780 /* Stash away info for yet another find line/function variant. */
1781 void *elf_find_function_cache
;
1783 /* Number of symbol version definitions we are about to emit. */
1784 unsigned int cverdefs
;
1786 /* Number of symbol version references we are about to emit. */
1787 unsigned int cverrefs
;
1789 /* Symbol version definitions in external objects. */
1790 Elf_Internal_Verdef
*verdef
;
1792 /* Symbol version references to external objects. */
1793 Elf_Internal_Verneed
*verref
;
1795 /* A pointer to the .eh_frame section. */
1796 asection
*eh_frame_section
;
1798 /* Symbol buffer. */
1801 obj_attribute known_obj_attributes
[2][NUM_KNOWN_OBJ_ATTRIBUTES
];
1802 obj_attribute_list
*other_obj_attributes
[2];
1804 /* Linked-list containing information about every Systemtap section
1805 found in the object file. Each section corresponds to one entry
1807 struct sdt_note
*sdt_note_head
;
1809 Elf_Internal_Shdr
**group_sect_ptr
;
1812 unsigned int symtab_section
, dynsymtab_section
;
1813 unsigned int dynversym_section
, dynverdef_section
, dynverref_section
;
1815 /* An identifier used to distinguish different target
1816 specific extensions to this structure. */
1817 enum elf_target_id object_id
;
1819 /* Whether a dyanmic object was specified normally on the linker
1820 command line, or was specified when --as-needed was in effect,
1821 or was found via a DT_NEEDED entry. */
1822 enum dynamic_lib_link_class dyn_lib_class
;
1824 /* Irix 5 often screws up the symbol table, sorting local symbols
1825 after global symbols. This flag is set if the symbol table in
1826 this BFD appears to be screwed up. If it is, we ignore the
1827 sh_info field in the symbol table header, and always read all the
1829 bfd_boolean bad_symtab
;
1831 enum elf_gnu_symbols has_gnu_symbols
;
1833 /* Information grabbed from an elf core file. */
1834 struct core_elf_obj_tdata
*core
;
1836 /* More information held for output ELF BFDs. */
1837 struct output_elf_obj_tdata
*o
;
1840 #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
1842 #define elf_object_id(bfd) (elf_tdata(bfd) -> object_id)
1843 #define elf_program_header_size(bfd) (elf_tdata(bfd) -> o->program_header_size)
1844 #define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header)
1845 #define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr)
1846 #define elf_numsections(bfd) (elf_tdata(bfd) -> num_elf_sections)
1847 #define elf_seg_map(bfd) (elf_tdata(bfd) -> o->seg_map)
1848 #define elf_next_file_pos(bfd) (elf_tdata(bfd) -> o->next_file_pos)
1849 #define elf_eh_frame_hdr(bfd) (elf_tdata(bfd) -> o->eh_frame_hdr)
1850 #define elf_linker(bfd) (elf_tdata(bfd) -> o->linker)
1851 #define elf_stack_flags(bfd) (elf_tdata(bfd) -> o->stack_flags)
1852 #define elf_shstrtab(bfd) (elf_tdata(bfd) -> o->strtab_ptr)
1853 #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section)
1854 #define elf_symtab_shndx_list(bfd) (elf_tdata(bfd) -> symtab_shndx_list)
1855 #define elf_strtab_sec(bfd) (elf_tdata(bfd) -> o->strtab_section)
1856 #define elf_shstrtab_sec(bfd) (elf_tdata(bfd) -> o->shstrtab_section)
1857 #define elf_symtab_hdr(bfd) (elf_tdata(bfd) -> symtab_hdr)
1858 #define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section)
1859 #define elf_dynversym(bfd) (elf_tdata(bfd) -> dynversym_section)
1860 #define elf_dynverdef(bfd) (elf_tdata(bfd) -> dynverdef_section)
1861 #define elf_dynverref(bfd) (elf_tdata(bfd) -> dynverref_section)
1862 #define elf_eh_frame_section(bfd) \
1863 (elf_tdata(bfd) -> eh_frame_section)
1864 #define elf_section_syms(bfd) (elf_tdata(bfd) -> o->section_syms)
1865 #define elf_num_section_syms(bfd) (elf_tdata(bfd) -> o->num_section_syms)
1866 #define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
1867 #define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
1868 #define elf_gp(bfd) (elf_tdata(bfd) -> gp)
1869 #define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size)
1870 #define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes)
1871 #define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts)
1872 #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets)
1873 #define elf_local_got_ents(bfd) (elf_tdata(bfd) -> local_got.ents)
1874 #define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name)
1875 #define elf_dt_audit(bfd) (elf_tdata(bfd) -> dt_audit)
1876 #define elf_dyn_lib_class(bfd) (elf_tdata(bfd) -> dyn_lib_class)
1877 #define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab)
1878 #define elf_flags_init(bfd) (elf_tdata(bfd) -> o->flags_init)
1879 #define elf_known_obj_attributes(bfd) (elf_tdata (bfd) -> known_obj_attributes)
1880 #define elf_other_obj_attributes(bfd) (elf_tdata (bfd) -> other_obj_attributes)
1881 #define elf_known_obj_attributes_proc(bfd) \
1882 (elf_known_obj_attributes (bfd) [OBJ_ATTR_PROC])
1883 #define elf_other_obj_attributes_proc(bfd) \
1884 (elf_other_obj_attributes (bfd) [OBJ_ATTR_PROC])
1886 extern void _bfd_elf_swap_verdef_in
1887 (bfd
*, const Elf_External_Verdef
*, Elf_Internal_Verdef
*);
1888 extern void _bfd_elf_swap_verdef_out
1889 (bfd
*, const Elf_Internal_Verdef
*, Elf_External_Verdef
*);
1890 extern void _bfd_elf_swap_verdaux_in
1891 (bfd
*, const Elf_External_Verdaux
*, Elf_Internal_Verdaux
*);
1892 extern void _bfd_elf_swap_verdaux_out
1893 (bfd
*, const Elf_Internal_Verdaux
*, Elf_External_Verdaux
*);
1894 extern void _bfd_elf_swap_verneed_in
1895 (bfd
*, const Elf_External_Verneed
*, Elf_Internal_Verneed
*);
1896 extern void _bfd_elf_swap_verneed_out
1897 (bfd
*, const Elf_Internal_Verneed
*, Elf_External_Verneed
*);
1898 extern void _bfd_elf_swap_vernaux_in
1899 (bfd
*, const Elf_External_Vernaux
*, Elf_Internal_Vernaux
*);
1900 extern void _bfd_elf_swap_vernaux_out
1901 (bfd
*, const Elf_Internal_Vernaux
*, Elf_External_Vernaux
*);
1902 extern void _bfd_elf_swap_versym_in
1903 (bfd
*, const Elf_External_Versym
*, Elf_Internal_Versym
*);
1904 extern void _bfd_elf_swap_versym_out
1905 (bfd
*, const Elf_Internal_Versym
*, Elf_External_Versym
*);
1907 extern unsigned int _bfd_elf_section_from_bfd_section
1908 (bfd
*, asection
*);
1909 extern char *bfd_elf_string_from_elf_section
1910 (bfd
*, unsigned, unsigned);
1911 extern Elf_Internal_Sym
*bfd_elf_get_elf_syms
1912 (bfd
*, Elf_Internal_Shdr
*, size_t, size_t, Elf_Internal_Sym
*, void *,
1913 Elf_External_Sym_Shndx
*);
1914 extern const char *bfd_elf_sym_name
1915 (bfd
*, Elf_Internal_Shdr
*, Elf_Internal_Sym
*, asection
*);
1917 extern bfd_boolean _bfd_elf_copy_private_bfd_data
1919 extern bfd_boolean _bfd_elf_print_private_bfd_data
1921 const char * _bfd_elf_get_symbol_version_string
1922 (bfd
*, asymbol
*, bfd_boolean
*);
1923 extern void bfd_elf_print_symbol
1924 (bfd
*, void *, asymbol
*, bfd_print_symbol_type
);
1926 extern unsigned int _bfd_elf_eh_frame_address_size
1927 (bfd
*, asection
*);
1928 extern bfd_byte _bfd_elf_encode_eh_address
1929 (bfd
*abfd
, struct bfd_link_info
*info
, asection
*osec
, bfd_vma offset
,
1930 asection
*loc_sec
, bfd_vma loc_offset
, bfd_vma
*encoded
);
1931 extern bfd_boolean _bfd_elf_can_make_relative
1932 (bfd
*input_bfd
, struct bfd_link_info
*info
, asection
*eh_frame_section
);
1934 extern enum elf_reloc_type_class _bfd_elf_reloc_type_class
1935 (const struct bfd_link_info
*, const asection
*,
1936 const Elf_Internal_Rela
*);
1937 extern bfd_vma _bfd_elf_rela_local_sym
1938 (bfd
*, Elf_Internal_Sym
*, asection
**, Elf_Internal_Rela
*);
1939 extern bfd_vma _bfd_elf_rel_local_sym
1940 (bfd
*, Elf_Internal_Sym
*, asection
**, bfd_vma
);
1941 extern bfd_vma _bfd_elf_section_offset
1942 (bfd
*, struct bfd_link_info
*, asection
*, bfd_vma
);
1944 extern unsigned long bfd_elf_hash
1946 extern unsigned long bfd_elf_gnu_hash
1949 extern bfd_reloc_status_type bfd_elf_generic_reloc
1950 (bfd
*, arelent
*, asymbol
*, void *, asection
*, bfd
*, char **);
1951 extern bfd_boolean bfd_elf_allocate_object
1952 (bfd
*, size_t, enum elf_target_id
);
1953 extern bfd_boolean bfd_elf_make_object
1955 extern bfd_boolean bfd_elf_mkcorefile
1957 extern bfd_boolean _bfd_elf_make_section_from_shdr
1958 (bfd
*, Elf_Internal_Shdr
*, const char *, int);
1959 extern bfd_boolean _bfd_elf_make_section_from_phdr
1960 (bfd
*, Elf_Internal_Phdr
*, int, const char *);
1961 extern struct bfd_hash_entry
*_bfd_elf_link_hash_newfunc
1962 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *);
1963 extern struct bfd_link_hash_table
*_bfd_elf_link_hash_table_create
1965 extern void _bfd_elf_link_hash_table_free
1967 extern void _bfd_elf_link_hash_copy_indirect
1968 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
1969 struct elf_link_hash_entry
*);
1970 extern void _bfd_elf_link_hash_hide_symbol
1971 (struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd_boolean
);
1972 extern bfd_boolean _bfd_elf_link_hash_fixup_symbol
1973 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
1974 extern bfd_boolean _bfd_elf_link_hash_table_init
1975 (struct elf_link_hash_table
*, bfd
*,
1976 struct bfd_hash_entry
*(*)
1977 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *),
1978 unsigned int, enum elf_target_id
);
1979 extern bfd_boolean _bfd_elf_slurp_version_tables
1980 (bfd
*, bfd_boolean
);
1981 extern bfd_boolean _bfd_elf_merge_sections
1982 (bfd
*, struct bfd_link_info
*);
1983 extern bfd_boolean _bfd_elf_match_sections_by_type
1984 (bfd
*, const asection
*, bfd
*, const asection
*);
1985 extern bfd_boolean bfd_elf_is_group_section
1986 (bfd
*, const struct bfd_section
*);
1987 extern bfd_boolean _bfd_elf_section_already_linked
1988 (bfd
*, asection
*, struct bfd_link_info
*);
1989 extern void bfd_elf_set_group_contents
1990 (bfd
*, asection
*, void *);
1991 extern unsigned int _bfd_elf_filter_global_symbols
1992 (bfd
*, struct bfd_link_info
*, asymbol
**, long);
1993 extern asection
*_bfd_elf_check_kept_section
1994 (asection
*, struct bfd_link_info
*);
1995 #define _bfd_elf_link_just_syms _bfd_generic_link_just_syms
1996 extern void _bfd_elf_copy_link_hash_symbol_type
1997 (bfd
*, struct bfd_link_hash_entry
*, struct bfd_link_hash_entry
*);
1998 extern bfd_boolean _bfd_elf_size_group_sections
1999 (struct bfd_link_info
*);
2000 extern bfd_boolean _bfd_elf_fixup_group_sections
2001 (bfd
*, asection
*);
2002 extern bfd_boolean _bfd_elf_copy_private_header_data
2004 extern bfd_boolean _bfd_elf_copy_private_symbol_data
2005 (bfd
*, asymbol
*, bfd
*, asymbol
*);
2006 #define _bfd_generic_init_private_section_data \
2007 _bfd_elf_init_private_section_data
2008 extern bfd_boolean _bfd_elf_init_private_section_data
2009 (bfd
*, asection
*, bfd
*, asection
*, struct bfd_link_info
*);
2010 extern bfd_boolean _bfd_elf_copy_private_section_data
2011 (bfd
*, asection
*, bfd
*, asection
*);
2012 extern bfd_boolean _bfd_elf_write_object_contents
2014 extern bfd_boolean _bfd_elf_write_corefile_contents
2016 extern bfd_boolean _bfd_elf_set_section_contents
2017 (bfd
*, sec_ptr
, const void *, file_ptr
, bfd_size_type
);
2018 extern long _bfd_elf_get_symtab_upper_bound
2020 extern long _bfd_elf_canonicalize_symtab
2021 (bfd
*, asymbol
**);
2022 extern long _bfd_elf_get_dynamic_symtab_upper_bound
2024 extern long _bfd_elf_canonicalize_dynamic_symtab
2025 (bfd
*, asymbol
**);
2026 extern long _bfd_elf_get_synthetic_symtab
2027 (bfd
*, long, asymbol
**, long, asymbol
**, asymbol
**);
2028 extern long _bfd_elf_get_reloc_upper_bound
2030 extern long _bfd_elf_canonicalize_reloc
2031 (bfd
*, sec_ptr
, arelent
**, asymbol
**);
2032 extern asection
* _bfd_elf_get_dynamic_reloc_section
2033 (bfd
*, asection
*, bfd_boolean
);
2034 extern asection
* _bfd_elf_make_dynamic_reloc_section
2035 (asection
*, bfd
*, unsigned int, bfd
*, bfd_boolean
);
2036 extern long _bfd_elf_get_dynamic_reloc_upper_bound
2038 extern long _bfd_elf_canonicalize_dynamic_reloc
2039 (bfd
*, arelent
**, asymbol
**);
2040 extern asymbol
*_bfd_elf_make_empty_symbol
2042 extern void _bfd_elf_get_symbol_info
2043 (bfd
*, asymbol
*, symbol_info
*);
2044 extern bfd_boolean _bfd_elf_is_local_label_name
2045 (bfd
*, const char *);
2046 extern alent
*_bfd_elf_get_lineno
2048 extern bfd_boolean _bfd_elf_set_arch_mach
2049 (bfd
*, enum bfd_architecture
, unsigned long);
2050 extern bfd_boolean _bfd_elf_find_nearest_line
2051 (bfd
*, asymbol
**, asection
*, bfd_vma
,
2052 const char **, const char **, unsigned int *, unsigned int *);
2053 extern bfd_boolean _bfd_elf_find_line
2054 (bfd
*, asymbol
**, asymbol
*, const char **, unsigned int *);
2055 extern bfd_boolean _bfd_elf_find_inliner_info
2056 (bfd
*, const char **, const char **, unsigned int *);
2057 extern asymbol
*_bfd_elf_find_function
2058 (bfd
*, asymbol
**, asection
*, bfd_vma
, const char **, const char **);
2059 #define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols
2060 #define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
2061 extern int _bfd_elf_sizeof_headers
2062 (bfd
*, struct bfd_link_info
*);
2063 extern bfd_boolean _bfd_elf_new_section_hook
2064 (bfd
*, asection
*);
2065 extern const struct bfd_elf_special_section
*_bfd_elf_get_special_section
2066 (const char *, const struct bfd_elf_special_section
*, unsigned int);
2067 extern const struct bfd_elf_special_section
*_bfd_elf_get_sec_type_attr
2068 (bfd
*, asection
*);
2070 /* If the target doesn't have reloc handling written yet: */
2071 extern void _bfd_elf_no_info_to_howto
2072 (bfd
*, arelent
*, Elf_Internal_Rela
*);
2074 extern bfd_boolean bfd_section_from_shdr
2075 (bfd
*, unsigned int shindex
);
2076 extern bfd_boolean bfd_section_from_phdr
2077 (bfd
*, Elf_Internal_Phdr
*, int);
2079 extern int _bfd_elf_symbol_from_bfd_symbol
2080 (bfd
*, asymbol
**);
2082 extern Elf_Internal_Sym
*bfd_sym_from_r_symndx
2083 (struct sym_cache
*, bfd
*, unsigned long);
2084 extern asection
*bfd_section_from_elf_index
2085 (bfd
*, unsigned int);
2087 extern struct elf_strtab_hash
* _bfd_elf_strtab_init
2089 extern void _bfd_elf_strtab_free
2090 (struct elf_strtab_hash
*);
2091 extern size_t _bfd_elf_strtab_add
2092 (struct elf_strtab_hash
*, const char *, bfd_boolean
);
2093 extern void _bfd_elf_strtab_addref
2094 (struct elf_strtab_hash
*, size_t);
2095 extern void _bfd_elf_strtab_delref
2096 (struct elf_strtab_hash
*, size_t);
2097 extern unsigned int _bfd_elf_strtab_refcount
2098 (struct elf_strtab_hash
*, size_t);
2099 extern void _bfd_elf_strtab_clear_all_refs
2100 (struct elf_strtab_hash
*);
2101 extern void *_bfd_elf_strtab_save
2102 (struct elf_strtab_hash
*);
2103 extern void _bfd_elf_strtab_restore
2104 (struct elf_strtab_hash
*, void *);
2105 extern bfd_size_type _bfd_elf_strtab_size
2106 (struct elf_strtab_hash
*);
2107 extern bfd_size_type _bfd_elf_strtab_offset
2108 (struct elf_strtab_hash
*, size_t);
2109 extern bfd_boolean _bfd_elf_strtab_emit
2110 (bfd
*, struct elf_strtab_hash
*);
2111 extern void _bfd_elf_strtab_finalize
2112 (struct elf_strtab_hash
*);
2114 extern bfd_boolean bfd_elf_parse_eh_frame_entries
2115 (bfd
*, struct bfd_link_info
*);
2116 extern bfd_boolean _bfd_elf_parse_eh_frame_entry
2117 (struct bfd_link_info
*, asection
*, struct elf_reloc_cookie
*);
2118 extern void _bfd_elf_parse_eh_frame
2119 (bfd
*, struct bfd_link_info
*, asection
*, struct elf_reloc_cookie
*);
2120 extern bfd_boolean _bfd_elf_end_eh_frame_parsing
2121 (struct bfd_link_info
*info
);
2123 extern bfd_boolean _bfd_elf_discard_section_eh_frame
2124 (bfd
*, struct bfd_link_info
*, asection
*,
2125 bfd_boolean (*) (bfd_vma
, void *), struct elf_reloc_cookie
*);
2126 extern bfd_boolean _bfd_elf_discard_section_eh_frame_hdr
2127 (bfd
*, struct bfd_link_info
*);
2128 extern bfd_vma _bfd_elf_eh_frame_section_offset
2129 (bfd
*, struct bfd_link_info
*, asection
*, bfd_vma
);
2130 extern bfd_boolean _bfd_elf_write_section_eh_frame
2131 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
2132 bfd_boolean _bfd_elf_write_section_eh_frame_entry
2133 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
2134 extern bfd_boolean
_bfd_elf_fixup_eh_frame_hdr (struct bfd_link_info
*);
2135 extern bfd_boolean _bfd_elf_write_section_eh_frame_hdr
2136 (bfd
*, struct bfd_link_info
*);
2137 extern bfd_boolean _bfd_elf_eh_frame_present
2138 (struct bfd_link_info
*);
2139 extern bfd_boolean _bfd_elf_eh_frame_entry_present
2140 (struct bfd_link_info
*);
2141 extern bfd_boolean _bfd_elf_maybe_strip_eh_frame_hdr
2142 (struct bfd_link_info
*);
2144 extern bfd_boolean
_bfd_elf_hash_symbol (struct elf_link_hash_entry
*);
2146 extern long _bfd_elf_link_lookup_local_dynindx
2147 (struct bfd_link_info
*, bfd
*, long);
2148 extern bfd_boolean _bfd_elf_compute_section_file_positions
2149 (bfd
*, struct bfd_link_info
*);
2150 extern file_ptr _bfd_elf_assign_file_position_for_section
2151 (Elf_Internal_Shdr
*, file_ptr
, bfd_boolean
);
2153 extern bfd_boolean _bfd_elf_validate_reloc
2156 extern bfd_boolean _bfd_elf_link_create_dynamic_sections
2157 (bfd
*, struct bfd_link_info
*);
2158 extern bfd_boolean _bfd_elf_link_omit_section_dynsym
2159 (bfd
*, struct bfd_link_info
*, asection
*);
2160 extern bfd_boolean _bfd_elf_create_dynamic_sections
2161 (bfd
*, struct bfd_link_info
*);
2162 extern bfd_boolean _bfd_elf_create_got_section
2163 (bfd
*, struct bfd_link_info
*);
2164 extern asection
*_bfd_elf_section_for_symbol
2165 (struct elf_reloc_cookie
*, unsigned long, bfd_boolean
);
2166 extern struct elf_link_hash_entry
*_bfd_elf_define_linkage_sym
2167 (bfd
*, struct bfd_link_info
*, asection
*, const char *);
2168 extern void _bfd_elf_init_1_index_section
2169 (bfd
*, struct bfd_link_info
*);
2170 extern void _bfd_elf_init_2_index_sections
2171 (bfd
*, struct bfd_link_info
*);
2173 extern bfd_boolean _bfd_elfcore_make_pseudosection
2174 (bfd
*, char *, size_t, ufile_ptr
);
2175 extern char *_bfd_elfcore_strndup
2176 (bfd
*, char *, size_t);
2178 extern Elf_Internal_Rela
*_bfd_elf_link_read_relocs
2179 (bfd
*, asection
*, void *, Elf_Internal_Rela
*, bfd_boolean
);
2181 extern bfd_boolean _bfd_elf_link_output_relocs
2182 (bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*,
2183 struct elf_link_hash_entry
**);
2185 extern bfd_boolean _bfd_elf_adjust_dynamic_copy
2186 (struct bfd_link_info
*, struct elf_link_hash_entry
*, asection
*);
2188 extern bfd_boolean _bfd_elf_dynamic_symbol_p
2189 (struct elf_link_hash_entry
*, struct bfd_link_info
*, bfd_boolean
);
2191 extern bfd_boolean _bfd_elf_symbol_refs_local_p
2192 (struct elf_link_hash_entry
*, struct bfd_link_info
*, bfd_boolean
);
2194 extern bfd_reloc_status_type bfd_elf_perform_complex_relocation
2195 (bfd
*, asection
*, bfd_byte
*, Elf_Internal_Rela
*, bfd_vma
);
2197 extern bfd_boolean _bfd_elf_setup_sections
2200 extern void _bfd_elf_post_process_headers (bfd
* , struct bfd_link_info
*);
2202 extern const bfd_target
*bfd_elf32_object_p
2204 extern const bfd_target
*bfd_elf32_core_file_p
2206 extern char *bfd_elf32_core_file_failing_command
2208 extern int bfd_elf32_core_file_failing_signal
2210 extern bfd_boolean bfd_elf32_core_file_matches_executable_p
2212 extern int bfd_elf32_core_file_pid
2215 extern bfd_boolean bfd_elf32_swap_symbol_in
2216 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
2217 extern void bfd_elf32_swap_symbol_out
2218 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
2219 extern void bfd_elf32_swap_reloc_in
2220 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2221 extern void bfd_elf32_swap_reloc_out
2222 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2223 extern void bfd_elf32_swap_reloca_in
2224 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2225 extern void bfd_elf32_swap_reloca_out
2226 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2227 extern void bfd_elf32_swap_phdr_in
2228 (bfd
*, const Elf32_External_Phdr
*, Elf_Internal_Phdr
*);
2229 extern void bfd_elf32_swap_phdr_out
2230 (bfd
*, const Elf_Internal_Phdr
*, Elf32_External_Phdr
*);
2231 extern void bfd_elf32_swap_dyn_in
2232 (bfd
*, const void *, Elf_Internal_Dyn
*);
2233 extern void bfd_elf32_swap_dyn_out
2234 (bfd
*, const Elf_Internal_Dyn
*, void *);
2235 extern long bfd_elf32_slurp_symbol_table
2236 (bfd
*, asymbol
**, bfd_boolean
);
2237 extern bfd_boolean bfd_elf32_write_shdrs_and_ehdr
2239 extern int bfd_elf32_write_out_phdrs
2240 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
2241 extern bfd_boolean bfd_elf32_checksum_contents
2242 (bfd
* , void (*) (const void *, size_t, void *), void *);
2243 extern void bfd_elf32_write_relocs
2244 (bfd
*, asection
*, void *);
2245 extern bfd_boolean bfd_elf32_slurp_reloc_table
2246 (bfd
*, asection
*, asymbol
**, bfd_boolean
);
2248 extern const bfd_target
*bfd_elf64_object_p
2250 extern const bfd_target
*bfd_elf64_core_file_p
2252 extern char *bfd_elf64_core_file_failing_command
2254 extern int bfd_elf64_core_file_failing_signal
2256 extern bfd_boolean bfd_elf64_core_file_matches_executable_p
2258 extern int bfd_elf64_core_file_pid
2261 extern bfd_boolean bfd_elf64_swap_symbol_in
2262 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
2263 extern void bfd_elf64_swap_symbol_out
2264 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
2265 extern void bfd_elf64_swap_reloc_in
2266 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2267 extern void bfd_elf64_swap_reloc_out
2268 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2269 extern void bfd_elf64_swap_reloca_in
2270 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2271 extern void bfd_elf64_swap_reloca_out
2272 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2273 extern void bfd_elf64_swap_phdr_in
2274 (bfd
*, const Elf64_External_Phdr
*, Elf_Internal_Phdr
*);
2275 extern void bfd_elf64_swap_phdr_out
2276 (bfd
*, const Elf_Internal_Phdr
*, Elf64_External_Phdr
*);
2277 extern void bfd_elf64_swap_dyn_in
2278 (bfd
*, const void *, Elf_Internal_Dyn
*);
2279 extern void bfd_elf64_swap_dyn_out
2280 (bfd
*, const Elf_Internal_Dyn
*, void *);
2281 extern long bfd_elf64_slurp_symbol_table
2282 (bfd
*, asymbol
**, bfd_boolean
);
2283 extern bfd_boolean bfd_elf64_write_shdrs_and_ehdr
2285 extern int bfd_elf64_write_out_phdrs
2286 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
2287 extern bfd_boolean bfd_elf64_checksum_contents
2288 (bfd
* , void (*) (const void *, size_t, void *), void *);
2289 extern void bfd_elf64_write_relocs
2290 (bfd
*, asection
*, void *);
2291 extern bfd_boolean bfd_elf64_slurp_reloc_table
2292 (bfd
*, asection
*, asymbol
**, bfd_boolean
);
2294 extern bfd_boolean _bfd_elf_default_relocs_compatible
2295 (const bfd_target
*, const bfd_target
*);
2297 extern bfd_boolean _bfd_elf_relocs_compatible
2298 (const bfd_target
*, const bfd_target
*);
2299 extern bfd_boolean _bfd_elf_notice_as_needed
2300 (bfd
*, struct bfd_link_info
*, enum notice_asneeded_action
);
2302 extern struct elf_link_hash_entry
*_bfd_elf_archive_symbol_lookup
2303 (bfd
*, struct bfd_link_info
*, const char *);
2304 extern bfd_boolean bfd_elf_link_add_symbols
2305 (bfd
*, struct bfd_link_info
*);
2306 extern bfd_boolean _bfd_elf_add_dynamic_entry
2307 (struct bfd_link_info
*, bfd_vma
, bfd_vma
);
2308 extern bfd_boolean _bfd_elf_link_check_relocs
2309 (bfd
*, struct bfd_link_info
*);
2311 extern bfd_boolean bfd_elf_link_record_dynamic_symbol
2312 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
2314 extern int bfd_elf_link_record_local_dynamic_symbol
2315 (struct bfd_link_info
*, bfd
*, long);
2317 extern bfd_boolean _bfd_elf_close_and_cleanup
2320 extern bfd_boolean _bfd_elf_common_definition
2321 (Elf_Internal_Sym
*);
2323 extern unsigned int _bfd_elf_common_section_index
2326 extern asection
*_bfd_elf_common_section
2329 extern bfd_vma _bfd_elf_default_got_elt_size
2330 (bfd
*, struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd
*,
2333 extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn
2334 (bfd
*, arelent
*, struct bfd_symbol
*, void *,
2335 asection
*, bfd
*, char **);
2337 extern bfd_boolean bfd_elf_final_link
2338 (bfd
*, struct bfd_link_info
*);
2340 extern void _bfd_elf_gc_keep
2341 (struct bfd_link_info
*info
);
2343 extern bfd_boolean bfd_elf_gc_mark_dynamic_ref_symbol
2344 (struct elf_link_hash_entry
*h
, void *inf
);
2346 extern bfd_boolean bfd_elf_gc_sections
2347 (bfd
*, struct bfd_link_info
*);
2349 extern bfd_boolean bfd_elf_gc_record_vtinherit
2350 (bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
);
2352 extern bfd_boolean bfd_elf_gc_record_vtentry
2353 (bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
);
2355 extern asection
*_bfd_elf_gc_mark_hook
2356 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
2357 struct elf_link_hash_entry
*, Elf_Internal_Sym
*);
2359 extern asection
*_bfd_elf_gc_mark_rsec
2360 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
,
2361 struct elf_reloc_cookie
*, bfd_boolean
*);
2363 extern bfd_boolean _bfd_elf_gc_mark_reloc
2364 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
,
2365 struct elf_reloc_cookie
*);
2367 extern bfd_boolean _bfd_elf_gc_mark_fdes
2368 (struct bfd_link_info
*, asection
*, asection
*, elf_gc_mark_hook_fn
,
2369 struct elf_reloc_cookie
*);
2371 extern bfd_boolean _bfd_elf_gc_mark
2372 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
);
2374 extern bfd_boolean _bfd_elf_gc_mark_extra_sections
2375 (struct bfd_link_info
*, elf_gc_mark_hook_fn
);
2377 extern bfd_boolean bfd_elf_gc_common_finalize_got_offsets
2378 (bfd
*, struct bfd_link_info
*);
2380 extern bfd_boolean bfd_elf_gc_common_final_link
2381 (bfd
*, struct bfd_link_info
*);
2383 extern asection
*_bfd_elf_is_start_stop
2384 (const struct bfd_link_info
*, struct elf_link_hash_entry
*);
2386 extern bfd_boolean bfd_elf_reloc_symbol_deleted_p
2389 extern struct elf_segment_map
* _bfd_elf_make_dynamic_segment
2390 (bfd
*, asection
*);
2392 extern bfd_boolean _bfd_elf_map_sections_to_segments
2393 (bfd
*, struct bfd_link_info
*);
2395 extern bfd_boolean
_bfd_elf_is_function_type (unsigned int);
2397 extern bfd_size_type
_bfd_elf_maybe_function_sym (const asymbol
*, asection
*,
2400 extern asection
*_bfd_elf_get_reloc_section (asection
*);
2402 extern int bfd_elf_get_default_section_type (flagword
);
2404 extern bfd_boolean bfd_elf_lookup_section_flags
2405 (struct bfd_link_info
*, struct flag_info
*, asection
*);
2407 extern Elf_Internal_Phdr
* _bfd_elf_find_segment_containing_section
2408 (bfd
* abfd
, asection
* section
);
2410 /* PowerPC @tls opcode transform/validate. */
2411 extern unsigned int _bfd_elf_ppc_at_tls_transform
2412 (unsigned int, unsigned int);
2413 /* PowerPC @tprel opcode transform/validate. */
2414 extern unsigned int _bfd_elf_ppc_at_tprel_transform
2415 (unsigned int, unsigned int);
2416 /* PowerPC elf_object_p tweak. */
2417 extern bfd_boolean
_bfd_elf_ppc_set_arch (bfd
*);
2418 /* PowerPC .gnu.attributes handling common to both 32-bit and 64-bit. */
2419 extern void _bfd_elf_ppc_merge_fp_attributes (bfd
*, struct bfd_link_info
*);
2421 /* Exported interface for writing elf corefile notes. */
2422 extern char *elfcore_write_note
2423 (bfd
*, char *, int *, const char *, int, const void *, int);
2424 extern char *elfcore_write_prpsinfo
2425 (bfd
*, char *, int *, const char *, const char *);
2426 extern char *elfcore_write_prstatus
2427 (bfd
*, char *, int *, long, int, const void *);
2428 extern char * elfcore_write_pstatus
2429 (bfd
*, char *, int *, long, int, const void *);
2430 extern char *elfcore_write_prfpreg
2431 (bfd
*, char *, int *, const void *, int);
2432 extern char *elfcore_write_prxfpreg
2433 (bfd
*, char *, int *, const void *, int);
2434 extern char *elfcore_write_xstatereg
2435 (bfd
*, char *, int *, const void *, int);
2436 extern char *elfcore_write_ppc_vmx
2437 (bfd
*, char *, int *, const void *, int);
2438 extern char *elfcore_write_ppc_vsx
2439 (bfd
*, char *, int *, const void *, int);
2440 extern char *elfcore_write_s390_timer
2441 (bfd
*, char *, int *, const void *, int);
2442 extern char *elfcore_write_s390_todcmp
2443 (bfd
*, char *, int *, const void *, int);
2444 extern char *elfcore_write_s390_todpreg
2445 (bfd
*, char *, int *, const void *, int);
2446 extern char *elfcore_write_s390_ctrs
2447 (bfd
*, char *, int *, const void *, int);
2448 extern char *elfcore_write_s390_prefix
2449 (bfd
*, char *, int *, const void *, int);
2450 extern char *elfcore_write_s390_last_break
2451 (bfd
*, char *, int *, const void *, int);
2452 extern char *elfcore_write_s390_system_call
2453 (bfd
*, char *, int *, const void *, int);
2454 extern char *elfcore_write_s390_tdb
2455 (bfd
*, char *, int *, const void *, int);
2456 extern char *elfcore_write_s390_vxrs_low
2457 (bfd
*, char *, int *, const void *, int);
2458 extern char *elfcore_write_s390_vxrs_high
2459 (bfd
*, char *, int *, const void *, int);
2460 extern char *elfcore_write_arm_vfp
2461 (bfd
*, char *, int *, const void *, int);
2462 extern char *elfcore_write_aarch_tls
2463 (bfd
*, char *, int *, const void *, int);
2464 extern char *elfcore_write_aarch_hw_break
2465 (bfd
*, char *, int *, const void *, int);
2466 extern char *elfcore_write_aarch_hw_watch
2467 (bfd
*, char *, int *, const void *, int);
2468 extern char *elfcore_write_lwpstatus
2469 (bfd
*, char *, int *, long, int, const void *);
2470 extern char *elfcore_write_register_note
2471 (bfd
*, char *, int *, const char *, const void *, int);
2473 /* Internal structure which holds information to be included in the
2474 PRPSINFO section of Linux core files.
2476 This is an "internal" structure in the sense that it should be used
2477 to pass information to BFD (via the `elfcore_write_linux_prpsinfo'
2478 function), so things like endianess shouldn't be an issue. This
2479 structure will eventually be converted in one of the
2480 `elf_external_linux_*' structures and written out to an output bfd
2481 by one of the functions declared below. */
2483 struct elf_internal_linux_prpsinfo
2485 char pr_state
; /* Numeric process state. */
2486 char pr_sname
; /* Char for pr_state. */
2487 char pr_zomb
; /* Zombie. */
2488 char pr_nice
; /* Nice val. */
2489 unsigned long pr_flag
; /* Flags. */
2490 unsigned int pr_uid
;
2491 unsigned int pr_gid
;
2492 int pr_pid
, pr_ppid
, pr_pgrp
, pr_sid
;
2493 char pr_fname
[16 + 1]; /* Filename of executable. */
2494 char pr_psargs
[80 + 1]; /* Initial part of arg list. */
2497 /* Linux/most 32-bit archs. */
2498 extern char *elfcore_write_linux_prpsinfo32
2499 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
2501 /* Linux/most 64-bit archs. */
2502 extern char *elfcore_write_linux_prpsinfo64
2503 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
2505 /* Linux/PPC32 uses different layout compared to most archs. */
2506 extern char *elfcore_write_ppc_linux_prpsinfo32
2507 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
2509 extern bfd
*_bfd_elf32_bfd_from_remote_memory
2510 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
2511 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, bfd_size_type
));
2512 extern bfd
*_bfd_elf64_bfd_from_remote_memory
2513 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
2514 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, bfd_size_type
));
2516 extern bfd_vma
bfd_elf_obj_attr_size (bfd
*);
2517 extern void bfd_elf_set_obj_attr_contents (bfd
*, bfd_byte
*, bfd_vma
);
2518 extern int bfd_elf_get_obj_attr_int (bfd
*, int, unsigned int);
2519 extern void bfd_elf_add_obj_attr_int (bfd
*, int, unsigned int, unsigned int);
2520 #define bfd_elf_add_proc_attr_int(BFD, TAG, VALUE) \
2521 bfd_elf_add_obj_attr_int ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2522 extern void bfd_elf_add_obj_attr_string (bfd
*, int, unsigned int, const char *);
2523 #define bfd_elf_add_proc_attr_string(BFD, TAG, VALUE) \
2524 bfd_elf_add_obj_attr_string ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2525 extern void bfd_elf_add_obj_attr_int_string (bfd
*, int, unsigned int,
2526 unsigned int, const char *);
2527 #define bfd_elf_add_proc_attr_int_string(BFD, TAG, INTVAL, STRVAL) \
2528 bfd_elf_add_obj_attr_int_string ((BFD), OBJ_ATTR_PROC, (TAG), \
2531 extern char *_bfd_elf_attr_strdup (bfd
*, const char *);
2532 extern void _bfd_elf_copy_obj_attributes (bfd
*, bfd
*);
2533 extern int _bfd_elf_obj_attrs_arg_type (bfd
*, int, unsigned int);
2534 extern void _bfd_elf_parse_attributes (bfd
*, Elf_Internal_Shdr
*);
2535 extern bfd_boolean _bfd_elf_merge_object_attributes
2536 (bfd
*, struct bfd_link_info
*);
2537 extern bfd_boolean
_bfd_elf_merge_unknown_attribute_low (bfd
*, bfd
*, int);
2538 extern bfd_boolean
_bfd_elf_merge_unknown_attribute_list (bfd
*, bfd
*);
2539 extern Elf_Internal_Shdr
*_bfd_elf_single_rel_hdr (asection
*sec
);
2541 /* The linker may need to keep track of the number of relocs that it
2542 decides to copy as dynamic relocs in check_relocs for each symbol.
2543 This is so that it can later discard them if they are found to be
2544 unnecessary. We can store the information in a field extending the
2545 regular ELF linker hash table. */
2547 struct elf_dyn_relocs
2549 struct elf_dyn_relocs
*next
;
2551 /* The input section of the reloc. */
2554 /* Total number of relocs copied for the input section. */
2555 bfd_size_type count
;
2557 /* Number of pc-relative relocs copied for the input section. */
2558 bfd_size_type pc_count
;
2561 extern bfd_boolean _bfd_elf_create_ifunc_sections
2562 (bfd
*, struct bfd_link_info
*);
2563 extern bfd_boolean _bfd_elf_allocate_ifunc_dyn_relocs
2564 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
2565 struct elf_dyn_relocs
**, bfd_boolean
*, unsigned int,
2566 unsigned int, unsigned int, bfd_boolean
);
2567 extern long _bfd_elf_ifunc_get_synthetic_symtab
2568 (bfd
*, long, asymbol
**, long, asymbol
**, asymbol
**, asection
*,
2569 bfd_vma
*(*) (bfd
*, asymbol
**, asection
*, asection
*));
2571 extern void elf_append_rela (bfd
*, asection
*, Elf_Internal_Rela
*);
2572 extern void elf_append_rel (bfd
*, asection
*, Elf_Internal_Rela
*);
2574 extern bfd_vma
elf64_r_info (bfd_vma
, bfd_vma
);
2575 extern bfd_vma
elf64_r_sym (bfd_vma
);
2576 extern bfd_vma
elf32_r_info (bfd_vma
, bfd_vma
);
2577 extern bfd_vma
elf32_r_sym (bfd_vma
);
2579 /* Large common section. */
2580 extern asection _bfd_elf_large_com_section
;
2582 /* Hash for local symbol with the first section id, ID, in the input
2583 file and the local symbol index, SYM. */
2584 #define ELF_LOCAL_SYMBOL_HASH(ID, SYM) \
2585 (((((ID) & 0xff) << 24) | (((ID) & 0xff00) << 8)) \
2586 ^ (SYM) ^ ((ID) >> 16))
2588 /* This is the condition under which finish_dynamic_symbol will be called.
2589 If our finish_dynamic_symbol isn't called, we'll need to do something
2590 about initializing any .plt and .got entries in relocate_section. */
2591 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
2593 && ((SHARED) || !(H)->forced_local) \
2594 && ((H)->dynindx != -1 || (H)->forced_local))
2596 /* This macro is to avoid lots of duplicated code in the body
2597 of xxx_relocate_section() in the various elfxx-xxxx.c files. */
2598 #define RELOC_FOR_GLOBAL_SYMBOL(info, input_bfd, input_section, rel, \
2599 r_symndx, symtab_hdr, sym_hashes, \
2600 h, sec, relocation, \
2601 unresolved_reloc, warned, ignored) \
2604 /* It seems this can happen with erroneous or unsupported \
2605 input (mixing a.out and elf in an archive, for example.) */ \
2606 if (sym_hashes == NULL) \
2609 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; \
2611 if (info->wrap_hash != NULL \
2612 && (input_section->flags & SEC_DEBUGGING) != 0) \
2613 h = ((struct elf_link_hash_entry *) \
2614 unwrap_hash_lookup (info, input_bfd, &h->root)); \
2616 while (h->root.type == bfd_link_hash_indirect \
2617 || h->root.type == bfd_link_hash_warning) \
2618 h = (struct elf_link_hash_entry *) h->root.u.i.link; \
2622 unresolved_reloc = FALSE; \
2624 if (h->root.type == bfd_link_hash_defined \
2625 || h->root.type == bfd_link_hash_defweak) \
2627 sec = h->root.u.def.section; \
2629 || sec->output_section == NULL) \
2630 /* Set a flag that will be cleared later if we find a \
2631 relocation value for this symbol. output_section \
2632 is typically NULL for symbols satisfied by a shared \
2634 unresolved_reloc = TRUE; \
2636 relocation = (h->root.u.def.value \
2637 + sec->output_section->vma \
2638 + sec->output_offset); \
2640 else if (h->root.type == bfd_link_hash_undefweak) \
2642 else if (info->unresolved_syms_in_objects == RM_IGNORE \
2643 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) \
2645 else if (!bfd_link_relocatable (info)) \
2648 err = (info->unresolved_syms_in_objects == RM_GENERATE_ERROR \
2649 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT); \
2650 (*info->callbacks->undefined_symbol) (info, \
2651 h->root.root.string, \
2654 rel->r_offset, err); \
2657 (void) unresolved_reloc; \
2663 /* This macro is to avoid lots of duplicated code in the body of the
2664 loop over relocations in xxx_relocate_section() in the various
2667 Handle relocations against symbols from removed linkonce sections,
2668 or sections discarded by a linker script. When doing a relocatable
2669 link, we remove such relocations. Otherwise, we just want the
2670 section contents zeroed and avoid any special processing. */
2671 #define RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
2672 rel, count, relend, \
2673 howto, index, contents) \
2676 _bfd_clear_contents (howto, input_bfd, input_section, \
2677 contents + rel[index].r_offset); \
2679 if (bfd_link_relocatable (info) \
2680 && (input_section->flags & SEC_DEBUGGING)) \
2682 /* Only remove relocations in debug sections since other \
2683 sections may require relocations. */ \
2684 Elf_Internal_Shdr *rel_hdr; \
2686 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
2688 /* Avoid empty output section. */ \
2689 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
2691 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
2692 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
2693 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
2695 memmove (rel, rel + count, \
2696 (relend - rel - count) * sizeof (*rel)); \
2698 input_section->reloc_count--; \
2705 for (i_ = 0; i_ < count; i_++) \
2707 rel[i_].r_info = 0; \
2708 rel[i_].r_addend = 0; \
2714 /* Will a symbol be bound to the definition within the shared
2715 library, if any. A unique symbol can never be bound locally. */
2716 #define SYMBOLIC_BIND(INFO, H) \
2717 (!(H)->unique_global \
2718 && ((INFO)->symbolic || ((INFO)->dynamic && !(H)->dynamic)))
2723 #endif /* _LIBELF_H_ */