1 /* BFD back-end data structures for ELF files.
2 Copyright (C) 1992-2016 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 we need to add an 'R' (FDE encoding) entry to the
346 CIE's augmentation data. */
347 unsigned int add_fde_encoding
: 1;
349 /* True if we have merged this CIE with another. */
350 unsigned int merged
: 1;
353 unsigned int pad1
: 18;
356 unsigned int reloc_index
;
359 unsigned int new_offset
;
360 unsigned int fde_encoding
: 8;
361 unsigned int lsda_encoding
: 8;
362 unsigned int lsda_offset
: 8;
364 /* True if this entry represents a CIE, false if it represents an FDE. */
365 unsigned int cie
: 1;
367 /* True if this entry is currently marked for removal. */
368 unsigned int removed
: 1;
370 /* True if we need to add a 'z' (augmentation size) entry to the CIE's
371 augmentation data, and an associated byte to each of the CIE's FDEs. */
372 unsigned int add_augmentation_size
: 1;
374 /* True if we have decided to convert absolute FDE relocations into
375 relative ones. This applies to the first relocation in the FDE,
376 which is against the code that the FDE describes. */
377 unsigned int make_relative
: 1;
380 unsigned int pad1
: 4;
382 unsigned int *set_loc
;
385 struct eh_frame_sec_info
389 struct eh_cie_fde entry
[1];
392 struct eh_frame_array_ent
401 #define DWARF2_EH_HDR 1
402 #define COMPACT_EH_HDR 2
404 /* Endian-neutral code indicating that a function cannot be unwound. */
405 #define COMPACT_EH_CANT_UNWIND_OPCODE 0x015d5d01
407 struct dwarf_eh_frame_hdr_info
410 unsigned int fde_count
;
411 /* TRUE if .eh_frame_hdr should contain the sorted search table.
412 We build it if we successfully read all .eh_frame input sections
413 and recognize them. */
415 struct eh_frame_array_ent
*array
;
418 struct compact_eh_frame_hdr_info
420 unsigned int allocated_entries
;
421 /* eh_frame_entry fragments. */
425 struct eh_frame_hdr_info
428 unsigned int array_count
;
429 bfd_boolean frame_hdr_is_compact
;
432 struct dwarf_eh_frame_hdr_info dwarf
;
433 struct compact_eh_frame_hdr_info compact
;
438 /* Enum used to identify target specific extensions to the elf_obj_tdata
439 and elf_link_hash_table structures. Note the enums deliberately start
440 from 1 so that we can detect an uninitialized field. The generic value
441 is last so that additions to this enum do not need to modify more than
445 AARCH64_ELF_DATA
= 1,
482 struct elf_sym_strtab
484 Elf_Internal_Sym sym
;
485 unsigned long dest_index
;
486 unsigned long destshndx_index
;
489 /* ELF linker hash table. */
491 struct elf_link_hash_table
493 struct bfd_link_hash_table root
;
495 /* An identifier used to distinguish different target
496 specific extensions to this structure. */
497 enum elf_target_id hash_table_id
;
499 /* Whether we have created the special dynamic sections required
500 when linking against or generating a shared object. */
501 bfd_boolean dynamic_sections_created
;
503 /* True if this target has relocatable executables, so needs dynamic
505 bfd_boolean is_relocatable_executable
;
507 /* The BFD used to hold special sections created by the linker.
508 This will be the first BFD found which requires these sections to
512 /* The value to use when initialising got.refcount/offset and
513 plt.refcount/offset in an elf_link_hash_entry. Set to zero when
514 the values are refcounts. Set to init_got_offset/init_plt_offset
515 in size_dynamic_sections when the values may be offsets. */
516 union gotplt_union init_got_refcount
;
517 union gotplt_union init_plt_refcount
;
519 /* The value to use for got.refcount/offset and plt.refcount/offset
520 when the values may be offsets. Normally (bfd_vma) -1. */
521 union gotplt_union init_got_offset
;
522 union gotplt_union init_plt_offset
;
524 /* The number of symbols found in the link which is intended for the
525 mandatory DT_SYMTAB tag (.dynsym section) in .dynamic section. */
526 bfd_size_type dynsymcount
;
528 /* The string table of dynamic symbols, which becomes the .dynstr
530 struct elf_strtab_hash
*dynstr
;
532 /* The number of symbol strings found in the link which must be put
533 into the .strtab section. */
534 bfd_size_type strtabcount
;
536 /* The array size of the symbol string table, which becomes the
538 bfd_size_type strtabsize
;
540 /* The array of strings, which becomes the .strtab section. */
541 struct elf_sym_strtab
*strtab
;
543 /* The number of buckets in the hash table in the .hash section.
544 This is based on the number of dynamic symbols. */
545 bfd_size_type bucketcount
;
547 /* A linked list of DT_NEEDED names found in dynamic objects
548 included in the link. */
549 struct bfd_link_needed_list
*needed
;
551 /* Sections in the output bfd that provides a section symbol
552 to be used by relocations emitted against local symbols.
553 Most targets will not use data_index_section. */
554 asection
*text_index_section
;
555 asection
*data_index_section
;
557 /* The _GLOBAL_OFFSET_TABLE_ symbol. */
558 struct elf_link_hash_entry
*hgot
;
560 /* The _PROCEDURE_LINKAGE_TABLE_ symbol. */
561 struct elf_link_hash_entry
*hplt
;
563 /* The _DYNAMIC symbol. */
564 struct elf_link_hash_entry
*hdynamic
;
566 /* A pointer to information used to merge SEC_MERGE sections. */
569 /* Used to link stabs in sections. */
570 struct stab_info stab_info
;
572 /* Used by eh_frame code when editing .eh_frame. */
573 struct eh_frame_hdr_info eh_info
;
575 /* A linked list of local symbols to be added to .dynsym. */
576 struct elf_link_local_dynamic_entry
*dynlocal
;
578 /* A linked list of DT_RPATH/DT_RUNPATH names found in dynamic
579 objects included in the link. */
580 struct bfd_link_needed_list
*runpath
;
582 /* Cached first output tls section and size of PT_TLS segment. */
584 bfd_size_type tls_size
;
586 /* A linked list of BFD's loaded in the link. */
587 struct elf_link_loaded_list
*loaded
;
589 /* Short-cuts to get to dynamic linker sections. */
602 /* Look up an entry in an ELF linker hash table. */
604 #define elf_link_hash_lookup(table, string, create, copy, follow) \
605 ((struct elf_link_hash_entry *) \
606 bfd_link_hash_lookup (&(table)->root, (string), (create), \
609 /* Traverse an ELF linker hash table. */
611 #define elf_link_hash_traverse(table, func, info) \
612 (bfd_link_hash_traverse \
614 (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func), \
617 /* Get the ELF linker hash table from a link_info structure. */
619 #define elf_hash_table(p) ((struct elf_link_hash_table *) ((p)->hash))
621 #define elf_hash_table_id(table) ((table) -> hash_table_id)
623 /* Returns TRUE if the hash table is a struct elf_link_hash_table. */
624 #define is_elf_hash_table(htab) \
625 (((struct bfd_link_hash_table *) (htab))->type == bfd_link_elf_hash_table)
627 /* Used by bfd_sym_from_r_symndx to cache a small number of local
629 #define LOCAL_SYM_CACHE_SIZE 32
633 unsigned long indx
[LOCAL_SYM_CACHE_SIZE
];
634 Elf_Internal_Sym sym
[LOCAL_SYM_CACHE_SIZE
];
637 /* Constant information held for an ELF backend. */
639 struct elf_size_info
{
640 unsigned char sizeof_ehdr
, sizeof_phdr
, sizeof_shdr
;
641 unsigned char sizeof_rel
, sizeof_rela
, sizeof_sym
, sizeof_dyn
, sizeof_note
;
643 /* The size of entries in the .hash section. */
644 unsigned char sizeof_hash_entry
;
646 /* The number of internal relocations to allocate per external
648 unsigned char int_rels_per_ext_rel
;
649 /* We use some fixed size arrays. This should be large enough to
650 handle all back-ends. */
651 #define MAX_INT_RELS_PER_EXT_REL 3
653 unsigned char arch_size
, log_file_align
;
654 unsigned char elfclass
, ev_current
;
655 int (*write_out_phdrs
)
656 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
658 (*write_shdrs_and_ehdr
) (bfd
*);
659 bfd_boolean (*checksum_contents
)
660 (bfd
* , void (*) (const void *, size_t, void *), void *);
662 (bfd
*, asection
*, void *);
663 bfd_boolean (*swap_symbol_in
)
664 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
665 void (*swap_symbol_out
)
666 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
667 bfd_boolean (*slurp_reloc_table
)
668 (bfd
*, asection
*, asymbol
**, bfd_boolean
);
669 long (*slurp_symbol_table
)
670 (bfd
*, asymbol
**, bfd_boolean
);
672 (bfd
*, const void *, Elf_Internal_Dyn
*);
674 (bfd
*, const Elf_Internal_Dyn
*, void *);
676 /* This function is called to swap in a REL relocation. If an
677 external relocation corresponds to more than one internal
678 relocation, then all relocations are swapped in at once. */
679 void (*swap_reloc_in
)
680 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
682 /* This function is called to swap out a REL relocation. */
683 void (*swap_reloc_out
)
684 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
686 /* This function is called to swap in a RELA relocation. If an
687 external relocation corresponds to more than one internal
688 relocation, then all relocations are swapped in at once. */
689 void (*swap_reloca_in
)
690 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
692 /* This function is called to swap out a RELA relocation. */
693 void (*swap_reloca_out
)
694 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
697 #define elf_symbol_from(ABFD,S) \
698 (((S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \
699 && (S)->the_bfd->tdata.elf_obj_data != 0) \
700 ? (elf_symbol_type *) (S) \
703 enum elf_reloc_type_class
{
705 reloc_class_relative
,
711 struct elf_reloc_cookie
713 Elf_Internal_Rela
*rels
, *rel
, *relend
;
714 Elf_Internal_Sym
*locsyms
;
718 struct elf_link_hash_entry
**sym_hashes
;
720 bfd_boolean bad_symtab
;
723 /* The level of IRIX compatibility we're striving for. */
731 /* Mapping of ELF section names and types. */
732 struct bfd_elf_special_section
735 unsigned int prefix_length
;
736 /* 0 means name must match PREFIX exactly.
737 -1 means name must start with PREFIX followed by an arbitrary string.
738 -2 means name must match PREFIX exactly or consist of PREFIX followed
739 by a dot then anything.
740 > 0 means name must start with the first PREFIX_LENGTH chars of
741 PREFIX and finish with the last SUFFIX_LENGTH chars of PREFIX. */
742 signed int suffix_length
;
747 enum action_discarded
753 typedef asection
* (*elf_gc_mark_hook_fn
)
754 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
755 struct elf_link_hash_entry
*, Elf_Internal_Sym
*);
757 struct elf_backend_data
759 /* The architecture for this backend. */
760 enum bfd_architecture arch
;
762 /* An identifier used to distinguish different target specific
763 extensions to elf_obj_tdata and elf_link_hash_table structures. */
764 enum elf_target_id target_id
;
766 /* The ELF machine code (EM_xxxx) for this backend. */
767 int elf_machine_code
;
772 /* The maximum page size for this backend. */
775 /* The minimum page size for this backend. An input object will not be
776 considered page aligned unless its sections are correctly aligned for
777 pages at least this large. May be smaller than maxpagesize. */
780 /* The common page size for this backend. */
781 bfd_vma commonpagesize
;
783 /* The BFD flags applied to sections created for dynamic linking. */
784 flagword dynamic_sec_flags
;
786 /* Architecture-specific data for this backend.
787 This is actually a pointer to some type like struct elf_ARCH_data. */
788 const void *arch_data
;
790 /* A function to translate an ELF RELA relocation to a BFD arelent
792 void (*elf_info_to_howto
)
793 (bfd
*, arelent
*, Elf_Internal_Rela
*);
795 /* A function to translate an ELF REL relocation to a BFD arelent
797 void (*elf_info_to_howto_rel
)
798 (bfd
*, arelent
*, Elf_Internal_Rela
*);
800 /* A function to determine whether a symbol is global when
801 partitioning the symbol table into local and global symbols.
802 This should be NULL for most targets, in which case the correct
803 thing will be done. MIPS ELF, at least on the Irix 5, has
804 special requirements. */
805 bfd_boolean (*elf_backend_sym_is_global
)
808 /* The remaining functions are hooks which are called only if they
811 /* A function to permit a backend specific check on whether a
812 particular BFD format is relevant for an object file, and to
813 permit the backend to set any global information it wishes. When
814 this is called elf_elfheader is set, but anything else should be
815 used with caution. If this returns FALSE, the check_format
816 routine will return a bfd_error_wrong_format error. */
817 bfd_boolean (*elf_backend_object_p
)
820 /* A function to do additional symbol processing when reading the
821 ELF symbol table. This is where any processor-specific special
822 section indices are handled. */
823 void (*elf_backend_symbol_processing
)
826 /* A function to do additional symbol processing after reading the
827 entire ELF symbol table. */
828 bfd_boolean (*elf_backend_symbol_table_processing
)
829 (bfd
*, elf_symbol_type
*, unsigned int);
831 /* A function to set the type of the info field. Processor-specific
832 types should be handled here. */
833 int (*elf_backend_get_symbol_type
)
834 (Elf_Internal_Sym
*, int);
836 /* A function to return the linker hash table entry of a symbol that
837 might be satisfied by an archive symbol. */
838 struct elf_link_hash_entry
* (*elf_backend_archive_symbol_lookup
)
839 (bfd
*, struct bfd_link_info
*, const char *);
841 /* Return true if local section symbols should have a non-null st_name.
842 NULL implies false. */
843 bfd_boolean (*elf_backend_name_local_section_symbols
)
846 /* A function to do additional processing on the ELF section header
847 just before writing it out. This is used to set the flags and
848 type fields for some sections, or to actually write out data for
850 bfd_boolean (*elf_backend_section_processing
)
851 (bfd
*, Elf_Internal_Shdr
*);
853 /* A function to handle unusual section types when creating BFD
854 sections from ELF sections. */
855 bfd_boolean (*elf_backend_section_from_shdr
)
856 (bfd
*, Elf_Internal_Shdr
*, const char *, int);
858 /* A function to convert machine dependent ELF section header flags to
859 BFD internal section header flags. */
860 bfd_boolean (*elf_backend_section_flags
)
861 (flagword
*, const Elf_Internal_Shdr
*);
863 /* A function that returns a struct containing ELF section flags and
864 type for the given BFD section. */
865 const struct bfd_elf_special_section
* (*get_sec_type_attr
)
868 /* A function to handle unusual program segment types when creating BFD
869 sections from ELF program segments. */
870 bfd_boolean (*elf_backend_section_from_phdr
)
871 (bfd
*, Elf_Internal_Phdr
*, int, const char *);
873 /* A function to set up the ELF section header for a BFD section in
874 preparation for writing it out. This is where the flags and type
875 fields are set for unusual sections. */
876 bfd_boolean (*elf_backend_fake_sections
)
877 (bfd
*, Elf_Internal_Shdr
*, asection
*);
879 /* A function to get the ELF section index for a BFD section. If
880 this returns TRUE, the section was found. If it is a normal ELF
881 section, *RETVAL should be left unchanged. If it is not a normal
882 ELF section *RETVAL should be set to the SHN_xxxx index. */
883 bfd_boolean (*elf_backend_section_from_bfd_section
)
884 (bfd
*, asection
*, int *retval
);
886 /* If this field is not NULL, it is called by the add_symbols phase
887 of a link just before adding a symbol to the global linker hash
888 table. It may modify any of the fields as it wishes. If *NAME
889 is set to NULL, the symbol will be skipped rather than being
890 added to the hash table. This function is responsible for
891 handling all processor dependent symbol bindings and section
892 indices, and must set at least *FLAGS and *SEC for each processor
893 dependent case; failure to do so will cause a link error. */
894 bfd_boolean (*elf_add_symbol_hook
)
895 (bfd
*abfd
, struct bfd_link_info
*info
, Elf_Internal_Sym
*,
896 const char **name
, flagword
*flags
, asection
**sec
, bfd_vma
*value
);
898 /* If this field is not NULL, it is called by the elf_link_output_sym
899 phase of a link for each symbol which will appear in the object file.
900 On error, this function returns 0. 1 is returned when the symbol
901 should be output, 2 is returned when the symbol should be discarded. */
902 int (*elf_backend_link_output_symbol_hook
)
903 (struct bfd_link_info
*info
, const char *, Elf_Internal_Sym
*,
904 asection
*, struct elf_link_hash_entry
*);
906 /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend
907 linker the first time it encounters a dynamic object in the link.
908 This function must create any sections required for dynamic
909 linking. The ABFD argument is a dynamic object. The .interp,
910 .dynamic, .dynsym, .dynstr, and .hash functions have already been
911 created, and this function may modify the section flags if
912 desired. This function will normally create the .got and .plt
913 sections, but different backends have different requirements. */
914 bfd_boolean (*elf_backend_create_dynamic_sections
)
915 (bfd
*abfd
, struct bfd_link_info
*info
);
917 /* When creating a shared library, determine whether to omit the
918 dynamic symbol for the section. */
919 bfd_boolean (*elf_backend_omit_section_dynsym
)
920 (bfd
*output_bfd
, struct bfd_link_info
*info
, asection
*osec
);
922 /* Return TRUE if relocations of targets are compatible to the extent
923 that CHECK_RELOCS will properly process them. PR 4424. */
924 bfd_boolean (*relocs_compatible
) (const bfd_target
*, const bfd_target
*);
926 /* The CHECK_RELOCS function is called by the add_symbols phase of
927 the ELF backend linker. It is called once for each section with
928 relocs of an object file, just after the symbols for the object
929 file have been added to the global linker hash table. The
930 function must look through the relocs and do any special handling
931 required. This generally means allocating space in the global
932 offset table, and perhaps allocating space for a reloc. The
933 relocs are always passed as Rela structures; if the section
934 actually uses Rel structures, the r_addend field will always be
936 bfd_boolean (*check_relocs
)
937 (bfd
*abfd
, struct bfd_link_info
*info
, asection
*o
,
938 const Elf_Internal_Rela
*relocs
);
940 /* The CHECK_DIRECTIVES function is called once per input file by
941 the add_symbols phase of the ELF backend linker. The function
942 must inspect the bfd and create any additional symbols according
943 to any custom directives in the bfd. */
944 bfd_boolean (*check_directives
)
945 (bfd
*abfd
, struct bfd_link_info
*info
);
947 /* The NOTICE_AS_NEEDED function is called as the linker is about to
948 handle an as-needed lib (ACT = notice_as_needed), and after the
949 linker has decided to keep the lib (ACT = notice_needed) or when
950 the lib is not needed (ACT = notice_not_needed). */
951 bfd_boolean (*notice_as_needed
)
952 (bfd
*abfd
, struct bfd_link_info
*info
, enum notice_asneeded_action act
);
954 /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
955 linker for every symbol which is defined by a dynamic object and
956 referenced by a regular object. This is called after all the
957 input files have been seen, but before the SIZE_DYNAMIC_SECTIONS
958 function has been called. The hash table entry should be
959 bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be
960 defined in a section from a dynamic object. Dynamic object
961 sections are not included in the final link, and this function is
962 responsible for changing the value to something which the rest of
963 the link can deal with. This will normally involve adding an
964 entry to the .plt or .got or some such section, and setting the
965 symbol to point to that. */
966 bfd_boolean (*elf_backend_adjust_dynamic_symbol
)
967 (struct bfd_link_info
*info
, struct elf_link_hash_entry
*h
);
969 /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker
970 after all the linker input files have been seen but before the
971 section sizes have been set. This is called after
972 ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS. */
973 bfd_boolean (*elf_backend_always_size_sections
)
974 (bfd
*output_bfd
, struct bfd_link_info
*info
);
976 /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend
977 linker after all the linker input files have been seen but before
978 the sections sizes have been set. This is called after
979 ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols.
980 It is only called when linking against a dynamic object. It must
981 set the sizes of the dynamic sections, and may fill in their
982 contents as well. The generic ELF linker can handle the .dynsym,
983 .dynstr and .hash sections. This function must handle the
984 .interp section and any sections created by the
985 CREATE_DYNAMIC_SECTIONS entry point. */
986 bfd_boolean (*elf_backend_size_dynamic_sections
)
987 (bfd
*output_bfd
, struct bfd_link_info
*info
);
989 /* Set TEXT_INDEX_SECTION and DATA_INDEX_SECTION, the output sections
990 we keep to use as a base for relocs and symbols. */
991 void (*elf_backend_init_index_section
)
992 (bfd
*output_bfd
, struct bfd_link_info
*info
);
994 /* The RELOCATE_SECTION function is called by the ELF backend linker
995 to handle the relocations for a section.
997 The relocs are always passed as Rela structures; if the section
998 actually uses Rel structures, the r_addend field will always be
1001 This function is responsible for adjust the section contents as
1002 necessary, and (if using Rela relocs and generating a
1003 relocatable output file) adjusting the reloc addend as
1006 This function does not have to worry about setting the reloc
1007 address or the reloc symbol index.
1009 LOCAL_SYMS is a pointer to the swapped in local symbols.
1011 LOCAL_SECTIONS is an array giving the section in the input file
1012 corresponding to the st_shndx field of each local symbol.
1014 The global hash table entry for the global symbols can be found
1015 via elf_sym_hashes (input_bfd).
1017 When generating relocatable output, this function must handle
1018 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
1019 going to be the section symbol corresponding to the output
1020 section, which means that the addend must be adjusted
1023 Returns FALSE on error, TRUE on success, 2 if successful and
1024 relocations should be written for this section. */
1025 int (*elf_backend_relocate_section
)
1026 (bfd
*output_bfd
, struct bfd_link_info
*info
, bfd
*input_bfd
,
1027 asection
*input_section
, bfd_byte
*contents
, Elf_Internal_Rela
*relocs
,
1028 Elf_Internal_Sym
*local_syms
, asection
**local_sections
);
1030 /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend
1031 linker just before it writes a symbol out to the .dynsym section.
1032 The processor backend may make any required adjustment to the
1033 symbol. It may also take the opportunity to set contents of the
1034 dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on
1035 all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called
1036 on those symbols which are defined by a dynamic object. */
1037 bfd_boolean (*elf_backend_finish_dynamic_symbol
)
1038 (bfd
*output_bfd
, struct bfd_link_info
*info
,
1039 struct elf_link_hash_entry
*h
, Elf_Internal_Sym
*sym
);
1041 /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend
1042 linker just before it writes all the dynamic sections out to the
1043 output file. The FINISH_DYNAMIC_SYMBOL will have been called on
1044 all dynamic symbols. */
1045 bfd_boolean (*elf_backend_finish_dynamic_sections
)
1046 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1048 /* A function to do any beginning processing needed for the ELF file
1049 before building the ELF headers and computing file positions. */
1050 void (*elf_backend_begin_write_processing
)
1051 (bfd
*, struct bfd_link_info
*);
1053 /* A function to do any final processing needed for the ELF file
1054 before writing it out. The LINKER argument is TRUE if this BFD
1055 was created by the ELF backend linker. */
1056 void (*elf_backend_final_write_processing
)
1057 (bfd
*, bfd_boolean linker
);
1059 /* This function is called by get_program_header_size. It should
1060 return the number of additional program segments which this BFD
1061 will need. It should return -1 on error. */
1062 int (*elf_backend_additional_program_headers
)
1063 (bfd
*, struct bfd_link_info
*);
1065 /* This function is called to modify an existing segment map in a
1066 backend specific fashion. */
1067 bfd_boolean (*elf_backend_modify_segment_map
)
1068 (bfd
*, struct bfd_link_info
*);
1070 /* This function is called to modify program headers just before
1071 they are written. */
1072 bfd_boolean (*elf_backend_modify_program_headers
)
1073 (bfd
*, struct bfd_link_info
*);
1075 /* This function is called before section garbage collection to
1076 mark entry symbol sections. */
1078 (struct bfd_link_info
*);
1080 /* This function is called during section garbage collection to
1081 mark sections that define global symbols. */
1082 bfd_boolean (*gc_mark_dynamic_ref
)
1083 (struct elf_link_hash_entry
*, void *);
1085 /* This function is called during section gc to discover the section a
1086 particular relocation refers to. */
1087 elf_gc_mark_hook_fn gc_mark_hook
;
1089 /* This function, if defined, is called after the first gc marking pass
1090 to allow the backend to mark additional sections. */
1091 bfd_boolean (*gc_mark_extra_sections
)
1092 (struct bfd_link_info
*, elf_gc_mark_hook_fn
);
1094 /* This function, if defined, is called during the sweep phase of gc
1095 in order that a backend might update any data structures it might
1097 bfd_boolean (*gc_sweep_hook
)
1098 (bfd
*, struct bfd_link_info
*, asection
*, const Elf_Internal_Rela
*);
1100 /* This function, if defined, is called after the ELF headers have
1101 been created. This allows for things like the OS and ABI versions
1103 void (*elf_backend_post_process_headers
)
1104 (bfd
*, struct bfd_link_info
*);
1106 /* This function, if defined, prints a symbol to file and returns the
1107 name of the symbol to be printed. It should return NULL to fall
1108 back to default symbol printing. */
1109 const char *(*elf_backend_print_symbol_all
)
1110 (bfd
*, void *, asymbol
*);
1112 /* This function, if defined, is called after all local symbols and
1113 global symbols converted to locals are emitted into the symtab
1114 section. It allows the backend to emit special local symbols
1115 not handled in the hash table. */
1116 bfd_boolean (*elf_backend_output_arch_local_syms
)
1117 (bfd
*, struct bfd_link_info
*, void *,
1118 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym
*, asection
*,
1119 struct elf_link_hash_entry
*));
1121 /* This function, if defined, is called after all symbols are emitted
1122 into the symtab section. It allows the backend to emit special
1123 global symbols not handled in the hash table. */
1124 bfd_boolean (*elf_backend_output_arch_syms
)
1125 (bfd
*, struct bfd_link_info
*, void *,
1126 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym
*, asection
*,
1127 struct elf_link_hash_entry
*));
1129 /* Filter what symbols of the output file to include in the import
1130 library if one is created. */
1131 unsigned int (*elf_backend_filter_implib_symbols
)
1132 (bfd
*, struct bfd_link_info
*, asymbol
**, long);
1134 /* Copy any information related to dynamic linking from a pre-existing
1135 symbol to a newly created symbol. Also called to copy flags and
1136 other back-end info to a weakdef, in which case the symbol is not
1137 newly created and plt/got refcounts and dynamic indices should not
1139 void (*elf_backend_copy_indirect_symbol
)
1140 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
1141 struct elf_link_hash_entry
*);
1143 /* Modify any information related to dynamic linking such that the
1144 symbol is not exported. */
1145 void (*elf_backend_hide_symbol
)
1146 (struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd_boolean
);
1148 /* A function to do additional symbol fixup, called by
1149 _bfd_elf_fix_symbol_flags. */
1150 bfd_boolean (*elf_backend_fixup_symbol
)
1151 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
1153 /* Merge the backend specific symbol attribute. */
1154 void (*elf_backend_merge_symbol_attribute
)
1155 (struct elf_link_hash_entry
*, const Elf_Internal_Sym
*, bfd_boolean
,
1158 /* This function, if defined, will return a string containing the
1159 name of a target-specific dynamic tag. */
1160 char *(*elf_backend_get_target_dtag
)
1163 /* Decide whether an undefined symbol is special and can be ignored.
1164 This is the case for OPTIONAL symbols on IRIX. */
1165 bfd_boolean (*elf_backend_ignore_undef_symbol
)
1166 (struct elf_link_hash_entry
*);
1168 /* Emit relocations. Overrides default routine for emitting relocs,
1169 except during a relocatable link, or if all relocs are being emitted. */
1170 bfd_boolean (*elf_backend_emit_relocs
)
1171 (bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*,
1172 struct elf_link_hash_entry
**);
1174 /* Count relocations. Not called for relocatable links
1175 or if all relocs are being preserved in the output. */
1176 unsigned int (*elf_backend_count_relocs
)
1177 (struct bfd_link_info
*, asection
*);
1179 /* Count additionals relocations. Called for relocatable links if
1180 additional relocations needs to be created. */
1181 unsigned int (*elf_backend_count_additional_relocs
)
1184 /* Say whether to sort relocs output by ld -r and ld --emit-relocs,
1185 by r_offset. If NULL, default to true. */
1186 bfd_boolean (*sort_relocs_p
)
1189 /* This function, if defined, is called when an NT_PRSTATUS note is found
1191 bfd_boolean (*elf_backend_grok_prstatus
)
1192 (bfd
*, Elf_Internal_Note
*);
1194 /* This function, if defined, is called when an NT_PSINFO or NT_PRPSINFO
1195 note is found in a core file. */
1196 bfd_boolean (*elf_backend_grok_psinfo
)
1197 (bfd
*, Elf_Internal_Note
*);
1199 /* This function, if defined, is called to write a note to a corefile. */
1200 char *(*elf_backend_write_core_note
)
1201 (bfd
*abfd
, char *buf
, int *bufsiz
, int note_type
, ...);
1203 /* This function, if defined, is called to convert target-specific
1204 section flag names into hex values. */
1205 flagword (*elf_backend_lookup_section_flags_hook
)
1208 /* This function returns class of a reloc type. */
1209 enum elf_reloc_type_class (*elf_backend_reloc_type_class
)
1210 (const struct bfd_link_info
*, const asection
*, const Elf_Internal_Rela
*);
1212 /* This function, if defined, removes information about discarded functions
1213 from other sections which mention them. */
1214 bfd_boolean (*elf_backend_discard_info
)
1215 (bfd
*, struct elf_reloc_cookie
*, struct bfd_link_info
*);
1217 /* This function, if defined, signals that the function above has removed
1218 the discarded relocations for this section. */
1219 bfd_boolean (*elf_backend_ignore_discarded_relocs
)
1222 /* What to do when ld finds relocations against symbols defined in
1223 discarded sections. */
1224 unsigned int (*action_discarded
)
1227 /* This function returns the width of FDE pointers in bytes, or 0 if
1228 that can't be determined for some reason. The default definition
1229 goes by the bfd's EI_CLASS. */
1230 unsigned int (*elf_backend_eh_frame_address_size
)
1231 (bfd
*, asection
*);
1233 /* These functions tell elf-eh-frame whether to attempt to turn
1234 absolute or lsda encodings into pc-relative ones. The default
1235 definition enables these transformations. */
1236 bfd_boolean (*elf_backend_can_make_relative_eh_frame
)
1237 (bfd
*, struct bfd_link_info
*, asection
*);
1238 bfd_boolean (*elf_backend_can_make_lsda_relative_eh_frame
)
1239 (bfd
*, struct bfd_link_info
*, asection
*);
1241 /* This function returns an encoding after computing the encoded
1242 value (and storing it in ENCODED) for the given OFFSET into OSEC,
1243 to be stored in at LOC_OFFSET into the LOC_SEC input section.
1244 The default definition chooses a 32-bit PC-relative encoding. */
1245 bfd_byte (*elf_backend_encode_eh_address
)
1246 (bfd
*abfd
, struct bfd_link_info
*info
,
1247 asection
*osec
, bfd_vma offset
,
1248 asection
*loc_sec
, bfd_vma loc_offset
,
1251 /* This function, if defined, may write out the given section.
1252 Returns TRUE if it did so and FALSE if the caller should. */
1253 bfd_boolean (*elf_backend_write_section
)
1254 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
1256 /* The level of IRIX compatibility we're striving for.
1257 MIPS ELF specific function. */
1258 irix_compat_t (*elf_backend_mips_irix_compat
)
1261 reloc_howto_type
*(*elf_backend_mips_rtype_to_howto
)
1262 (unsigned int, bfd_boolean
);
1264 /* The swapping table to use when dealing with ECOFF information.
1265 Used for the MIPS ELF .mdebug section. */
1266 const struct ecoff_debug_swap
*elf_backend_ecoff_debug_swap
;
1268 /* This function implements `bfd_elf_bfd_from_remote_memory';
1269 see elf.c, elfcode.h. */
1270 bfd
*(*elf_backend_bfd_from_remote_memory
)
1271 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
1272 int (*target_read_memory
) (bfd_vma vma
, bfd_byte
*myaddr
,
1273 bfd_size_type len
));
1275 /* This function is used by `_bfd_elf_get_synthetic_symtab';
1277 bfd_vma (*plt_sym_val
) (bfd_vma
, const asection
*, const arelent
*);
1279 /* Is symbol defined in common section? */
1280 bfd_boolean (*common_definition
) (Elf_Internal_Sym
*);
1282 /* Return a common section index for section. */
1283 unsigned int (*common_section_index
) (asection
*);
1285 /* Return a common section for section. */
1286 asection
*(*common_section
) (asection
*);
1288 /* Return TRUE if we can merge 2 definitions. */
1289 bfd_boolean (*merge_symbol
) (struct elf_link_hash_entry
*,
1290 const Elf_Internal_Sym
*, asection
**,
1291 bfd_boolean
, bfd_boolean
,
1292 bfd
*, const asection
*);
1294 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
1295 bfd_boolean (*elf_hash_symbol
) (struct elf_link_hash_entry
*);
1297 /* Return TRUE if type is a function symbol type. */
1298 bfd_boolean (*is_function_type
) (unsigned int type
);
1300 /* If the ELF symbol SYM might be a function in SEC, return the
1301 function size and set *CODE_OFF to the function's entry point,
1302 otherwise return zero. */
1303 bfd_size_type (*maybe_function_sym
) (const asymbol
*sym
, asection
*sec
,
1306 /* Return the section which RELOC_SEC applies to. */
1307 asection
*(*get_reloc_section
) (asection
*reloc_sec
);
1309 /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
1310 has a type >= SHT_LOOS. Returns TRUE if the fields were initialised,
1311 FALSE otherwise. Can be called multiple times for a given section,
1312 until it returns TRUE. Most of the times it is called ISECTION will be
1313 set to an input section that might be associated with the output section.
1314 The last time that it is called, ISECTION will be set to NULL. */
1315 bfd_boolean (*elf_backend_copy_special_section_fields
)
1316 (const bfd
*ibfd
, bfd
*obfd
, const Elf_Internal_Shdr
*isection
,
1317 Elf_Internal_Shdr
*osection
);
1319 /* Used to handle bad SHF_LINK_ORDER input. */
1320 bfd_error_handler_type link_order_error_handler
;
1322 /* Name of the PLT relocation section. */
1323 const char *relplt_name
;
1325 /* Alternate EM_xxxx machine codes for this backend. */
1326 int elf_machine_alt1
;
1327 int elf_machine_alt2
;
1329 const struct elf_size_info
*s
;
1331 /* An array of target specific special sections. */
1332 const struct bfd_elf_special_section
*special_sections
;
1334 /* The size in bytes of the header for the GOT. This includes the
1335 so-called reserved entries on some systems. */
1336 bfd_vma got_header_size
;
1338 /* The size of the GOT entry for the symbol pointed to by H if non-NULL,
1339 otherwise by the local symbol with index SYMNDX in IBFD. */
1340 bfd_vma (*got_elt_size
) (bfd
*, struct bfd_link_info
*,
1341 struct elf_link_hash_entry
*h
,
1342 bfd
*ibfd
, unsigned long symndx
);
1344 /* The vendor name to use for a processor-standard attributes section. */
1345 const char *obj_attrs_vendor
;
1347 /* The section name to use for a processor-standard attributes section. */
1348 const char *obj_attrs_section
;
1350 /* Return 1, 2 or 3 to indicate what type of arguments a
1351 processor-specific tag takes. */
1352 int (*obj_attrs_arg_type
) (int);
1354 /* The section type to use for an attributes section. */
1355 unsigned int obj_attrs_section_type
;
1357 /* This function determines the order in which any attributes are
1358 written. It must be defined for input in the range
1359 LEAST_KNOWN_OBJ_ATTRIBUTE..NUM_KNOWN_OBJ_ATTRIBUTES-1 (this range
1360 is used in order to make unity easy). The returned value is the
1361 actual tag number to place in the input position. */
1362 int (*obj_attrs_order
) (int);
1364 /* Handle merging unknown attributes; either warn and return TRUE,
1365 or give an error and return FALSE. */
1366 bfd_boolean (*obj_attrs_handle_unknown
) (bfd
*, int);
1368 /* Encoding used for compact EH tables. */
1369 int (*compact_eh_encoding
) (struct bfd_link_info
*);
1371 /* Opcode representing no unwind. */
1372 int (*cant_unwind_opcode
) (struct bfd_link_info
*);
1374 /* This is non-zero if static TLS segments require a special alignment. */
1375 unsigned static_tls_alignment
;
1377 /* Alignment for the PT_GNU_STACK segment. */
1378 unsigned stack_align
;
1380 /* Flag bits to assign to a section of type SHT_STRTAB. */
1381 unsigned long elf_strtab_flags
;
1383 /* This is TRUE if the linker should act like collect and gather
1384 global constructors and destructors by name. This is TRUE for
1385 MIPS ELF because the Irix 5 tools can not handle the .init
1387 unsigned collect
: 1;
1389 /* This is TRUE if the linker should ignore changes to the type of a
1390 symbol. This is TRUE for MIPS ELF because some Irix 5 objects
1391 record undefined functions as STT_OBJECT although the definitions
1393 unsigned type_change_ok
: 1;
1395 /* Whether the backend may use REL relocations. (Some backends use
1396 both REL and RELA relocations, and this flag is set for those
1398 unsigned may_use_rel_p
: 1;
1400 /* Whether the backend may use RELA relocations. (Some backends use
1401 both REL and RELA relocations, and this flag is set for those
1403 unsigned may_use_rela_p
: 1;
1405 /* Whether the default relocation type is RELA. If a backend with
1406 this flag set wants REL relocations for a particular section,
1407 it must note that explicitly. Similarly, if this flag is clear,
1408 and the backend wants RELA relocations for a particular
1410 unsigned default_use_rela_p
: 1;
1412 /* True if PLT and copy relocations should be RELA by default. */
1413 unsigned rela_plts_and_copies_p
: 1;
1415 /* Set if RELA relocations for a relocatable link can be handled by
1416 generic code. Backends that set this flag need do nothing in the
1417 backend relocate_section routine for relocatable linking. */
1418 unsigned rela_normal
: 1;
1420 /* TRUE if addresses "naturally" sign extend. This is used when
1421 swapping in from Elf32 when BFD64. */
1422 unsigned sign_extend_vma
: 1;
1424 unsigned want_got_plt
: 1;
1425 unsigned plt_readonly
: 1;
1426 unsigned want_plt_sym
: 1;
1427 unsigned plt_not_loaded
: 1;
1428 unsigned plt_alignment
: 4;
1429 unsigned can_gc_sections
: 1;
1430 unsigned can_refcount
: 1;
1431 unsigned want_got_sym
: 1;
1432 unsigned want_dynbss
: 1;
1434 /* Targets which do not support physical addressing often require
1435 that the p_paddr field in the section header to be set to zero.
1436 This field indicates whether this behavior is required. */
1437 unsigned want_p_paddr_set_to_zero
: 1;
1439 /* True if an object file lacking a .note.GNU-stack section
1440 should be assumed to be requesting exec stack. At least one
1441 other file in the link needs to have a .note.GNU-stack section
1442 for a PT_GNU_STACK segment to be created. */
1443 unsigned default_execstack
: 1;
1445 /* True if elf_section_data(sec)->this_hdr.contents is sec->rawsize
1446 in length rather than sec->size in length, if sec->rawsize is
1447 non-zero and smaller than sec->size. */
1448 unsigned caches_rawsize
: 1;
1450 /* Address of protected data defined in the shared library may be
1451 external, i.e., due to copy relocation. */
1452 unsigned extern_protected_data
: 1;
1455 /* Information about reloc sections associated with a bfd_elf_section_data
1457 struct bfd_elf_section_reloc_data
1459 /* The ELF header for the reloc section associated with this
1461 Elf_Internal_Shdr
*hdr
;
1462 /* The number of relocations currently assigned to HDR. */
1464 /* The ELF section number of the reloc section. Only used for an
1467 /* Used by the backend linker to store the symbol hash table entries
1468 associated with relocs against global symbols. */
1469 struct elf_link_hash_entry
**hashes
;
1472 /* Information stored for each BFD section in an ELF file. This
1473 structure is allocated by elf_new_section_hook. */
1475 struct bfd_elf_section_data
1477 /* The ELF header for this section. */
1478 Elf_Internal_Shdr this_hdr
;
1480 /* INPUT_SECTION_FLAGS if specified in the linker script. */
1481 struct flag_info
*section_flag_info
;
1483 /* Information about the REL and RELA reloc sections associated
1484 with this section, if any. */
1485 struct bfd_elf_section_reloc_data rel
, rela
;
1487 /* The ELF section number of this section. */
1490 /* Used by the backend linker when generating a shared library to
1491 record the dynamic symbol index for a section symbol
1492 corresponding to this section. A value of 0 means that there is
1493 no dynamic symbol for this section. */
1496 /* A pointer to the linked-to section for SHF_LINK_ORDER. */
1497 asection
*linked_to
;
1499 /* A pointer to the swapped relocs. If the section uses REL relocs,
1500 rather than RELA, all the r_addend fields will be zero. This
1501 pointer may be NULL. It is used by the backend linker. */
1502 Elf_Internal_Rela
*relocs
;
1504 /* A pointer to a linked list tracking dynamic relocs copied for
1508 /* A pointer to the bfd section used for dynamic relocs. */
1512 /* Group name, if this section is a member of a group. */
1515 /* Group signature sym, if this is the SHT_GROUP section. */
1516 struct bfd_symbol
*id
;
1519 /* For a member of a group, points to the SHT_GROUP section.
1520 NULL for the SHT_GROUP section itself and non-group sections. */
1521 asection
*sec_group
;
1523 /* A linked list of member sections in the group. Circular when used by
1524 the linker. For the SHT_GROUP section, points at first member. */
1525 asection
*next_in_group
;
1527 /* The FDEs associated with this section. The u.fde.next_in_section
1528 field acts as a chain pointer. */
1529 struct eh_cie_fde
*fde_list
;
1531 /* Link from a text section to its .eh_frame_entry section. */
1532 asection
*eh_frame_entry
;
1534 /* A pointer used for various section optimizations. */
1538 #define elf_section_data(sec) ((struct bfd_elf_section_data*)(sec)->used_by_bfd)
1539 #define elf_linked_to_section(sec) (elf_section_data(sec)->linked_to)
1540 #define elf_section_type(sec) (elf_section_data(sec)->this_hdr.sh_type)
1541 #define elf_section_flags(sec) (elf_section_data(sec)->this_hdr.sh_flags)
1542 #define elf_group_name(sec) (elf_section_data(sec)->group.name)
1543 #define elf_group_id(sec) (elf_section_data(sec)->group.id)
1544 #define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group)
1545 #define elf_fde_list(sec) (elf_section_data(sec)->fde_list)
1546 #define elf_sec_group(sec) (elf_section_data(sec)->sec_group)
1547 #define elf_section_eh_frame_entry(sec) (elf_section_data(sec)->eh_frame_entry)
1549 #define xvec_get_elf_backend_data(xvec) \
1550 ((const struct elf_backend_data *) (xvec)->backend_data)
1552 #define get_elf_backend_data(abfd) \
1553 xvec_get_elf_backend_data ((abfd)->xvec)
1555 /* The least object attributes (within an attributes subsection) known
1556 for any target. Some code assumes that the value 0 is not used and
1557 the field for that attribute can instead be used as a marker to
1558 indicate that attributes have been initialized. */
1559 #define LEAST_KNOWN_OBJ_ATTRIBUTE 2
1561 /* The maximum number of known object attributes for any target. */
1562 #define NUM_KNOWN_OBJ_ATTRIBUTES 71
1564 /* The value of an object attribute. The type indicates whether the attribute
1565 holds and integer, a string, or both. It can also indicate that there can
1566 be no default (i.e. all values must be written to file, even zero). */
1568 typedef struct obj_attribute
1570 #define ATTR_TYPE_FLAG_INT_VAL (1 << 0)
1571 #define ATTR_TYPE_FLAG_STR_VAL (1 << 1)
1572 #define ATTR_TYPE_FLAG_NO_DEFAULT (1 << 2)
1574 #define ATTR_TYPE_HAS_INT_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_INT_VAL)
1575 #define ATTR_TYPE_HAS_STR_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_STR_VAL)
1576 #define ATTR_TYPE_HAS_NO_DEFAULT(TYPE) ((TYPE) & ATTR_TYPE_FLAG_NO_DEFAULT)
1583 typedef struct obj_attribute_list
1585 struct obj_attribute_list
*next
;
1588 } obj_attribute_list
;
1590 /* Object attributes may either be defined by the processor ABI, index
1591 OBJ_ATTR_PROC in the *_obj_attributes arrays, or be GNU-specific
1592 (and possibly also processor-specific), index OBJ_ATTR_GNU. */
1593 #define OBJ_ATTR_PROC 0
1594 #define OBJ_ATTR_GNU 1
1595 #define OBJ_ATTR_FIRST OBJ_ATTR_PROC
1596 #define OBJ_ATTR_LAST OBJ_ATTR_GNU
1598 /* The following object attribute tags are taken as generic, for all
1599 targets and for "gnu" where there is no target standard. */
1606 Tag_compatibility
= 32
1609 /* The following struct stores information about every SystemTap section
1610 found in the object file. */
1613 struct sdt_note
*next
;
1618 /* tdata information grabbed from an elf core file. */
1619 struct core_elf_obj_tdata
1628 /* Extra tdata information held for output ELF BFDs. */
1629 struct output_elf_obj_tdata
1631 struct elf_segment_map
*seg_map
;
1632 struct elf_strtab_hash
*strtab_ptr
;
1634 /* STT_SECTION symbols for each section */
1635 asymbol
**section_syms
;
1637 /* Used to determine if PT_GNU_EH_FRAME segment header should be
1639 asection
*eh_frame_hdr
;
1641 /* NT_GNU_BUILD_ID note type info. */
1644 bfd_boolean (*after_write_object_contents
) (bfd
*);
1649 /* Records the result of `get_program_header_size'. */
1650 bfd_size_type program_header_size
;
1652 /* Used when laying out sections. */
1653 file_ptr next_file_pos
;
1655 int num_section_syms
;
1656 unsigned int shstrtab_section
, strtab_section
;
1658 /* Segment flags for the PT_GNU_STACK segment. */
1659 unsigned int stack_flags
;
1661 /* This is set to TRUE if the object was created by the backend
1665 /* Used to determine if the e_flags field has been initialized */
1666 bfd_boolean flags_init
;
1669 /* Indicate if the bfd contains symbols that have the STT_GNU_IFUNC
1670 symbol type or STB_GNU_UNIQUE binding. Used to set the osabi
1671 field in the ELF header structure. */
1672 enum elf_gnu_symbols
1674 elf_gnu_symbol_none
= 0,
1675 elf_gnu_symbol_any
= 1 << 0,
1676 elf_gnu_symbol_ifunc
= (elf_gnu_symbol_any
| 1 << 1),
1677 elf_gnu_symbol_unique
= (elf_gnu_symbol_any
| 1 << 2),
1678 elf_gnu_symbol_all
= (elf_gnu_symbol_ifunc
| elf_gnu_symbol_unique
)
1681 typedef struct elf_section_list
1683 Elf_Internal_Shdr hdr
;
1685 struct elf_section_list
* next
;
1689 /* Some private data is stashed away for future use using the tdata pointer
1690 in the bfd structure. */
1692 struct elf_obj_tdata
1694 Elf_Internal_Ehdr elf_header
[1]; /* Actual data, but ref like ptr */
1695 Elf_Internal_Shdr
**elf_sect_ptr
;
1696 Elf_Internal_Phdr
*phdr
;
1697 Elf_Internal_Shdr symtab_hdr
;
1698 Elf_Internal_Shdr shstrtab_hdr
;
1699 Elf_Internal_Shdr strtab_hdr
;
1700 Elf_Internal_Shdr dynsymtab_hdr
;
1701 Elf_Internal_Shdr dynstrtab_hdr
;
1702 Elf_Internal_Shdr dynversym_hdr
;
1703 Elf_Internal_Shdr dynverref_hdr
;
1704 Elf_Internal_Shdr dynverdef_hdr
;
1705 elf_section_list
* symtab_shndx_list
;
1706 bfd_vma gp
; /* The gp value */
1707 unsigned int gp_size
; /* The gp size */
1708 unsigned int num_elf_sections
; /* elf_sect_ptr size */
1710 /* A mapping from external symbols to entries in the linker hash
1711 table, used when linking. This is indexed by the symbol index
1712 minus the sh_info field of the symbol table header. */
1713 struct elf_link_hash_entry
**sym_hashes
;
1715 /* Track usage and final offsets of GOT entries for local symbols.
1716 This array is indexed by symbol index. Elements are used
1717 identically to "got" in struct elf_link_hash_entry. */
1720 bfd_signed_vma
*refcounts
;
1722 struct got_entry
**ents
;
1725 /* The linker ELF emulation code needs to let the backend ELF linker
1726 know what filename should be used for a dynamic object if the
1727 dynamic object is found using a search. The emulation code then
1728 sometimes needs to know what name was actually used. Until the
1729 file has been added to the linker symbol table, this field holds
1730 the name the linker wants. After it has been added, it holds the
1731 name actually used, which will be the DT_SONAME entry if there is
1733 const char *dt_name
;
1735 /* The linker emulation needs to know what audit libs
1736 are used by a dynamic object. */
1737 const char *dt_audit
;
1739 /* Used by find_nearest_line entry point. */
1742 /* A place to stash dwarf1 info for this bfd. */
1743 struct dwarf1_debug
*dwarf1_find_line_info
;
1745 /* A place to stash dwarf2 info for this bfd. */
1746 void *dwarf2_find_line_info
;
1748 /* Stash away info for yet another find line/function variant. */
1749 void *elf_find_function_cache
;
1751 /* Number of symbol version definitions we are about to emit. */
1752 unsigned int cverdefs
;
1754 /* Number of symbol version references we are about to emit. */
1755 unsigned int cverrefs
;
1757 /* Symbol version definitions in external objects. */
1758 Elf_Internal_Verdef
*verdef
;
1760 /* Symbol version references to external objects. */
1761 Elf_Internal_Verneed
*verref
;
1763 /* A pointer to the .eh_frame section. */
1764 asection
*eh_frame_section
;
1766 /* Symbol buffer. */
1769 obj_attribute known_obj_attributes
[2][NUM_KNOWN_OBJ_ATTRIBUTES
];
1770 obj_attribute_list
*other_obj_attributes
[2];
1772 /* Linked-list containing information about every Systemtap section
1773 found in the object file. Each section corresponds to one entry
1775 struct sdt_note
*sdt_note_head
;
1777 Elf_Internal_Shdr
**group_sect_ptr
;
1780 unsigned int symtab_section
, dynsymtab_section
;
1781 unsigned int dynversym_section
, dynverdef_section
, dynverref_section
;
1783 /* An identifier used to distinguish different target
1784 specific extensions to this structure. */
1785 enum elf_target_id object_id
;
1787 /* Whether a dyanmic object was specified normally on the linker
1788 command line, or was specified when --as-needed was in effect,
1789 or was found via a DT_NEEDED entry. */
1790 enum dynamic_lib_link_class dyn_lib_class
;
1792 /* Irix 5 often screws up the symbol table, sorting local symbols
1793 after global symbols. This flag is set if the symbol table in
1794 this BFD appears to be screwed up. If it is, we ignore the
1795 sh_info field in the symbol table header, and always read all the
1797 bfd_boolean bad_symtab
;
1799 enum elf_gnu_symbols has_gnu_symbols
;
1801 /* Information grabbed from an elf core file. */
1802 struct core_elf_obj_tdata
*core
;
1804 /* More information held for output ELF BFDs. */
1805 struct output_elf_obj_tdata
*o
;
1808 #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
1810 #define elf_object_id(bfd) (elf_tdata(bfd) -> object_id)
1811 #define elf_program_header_size(bfd) (elf_tdata(bfd) -> o->program_header_size)
1812 #define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header)
1813 #define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr)
1814 #define elf_numsections(bfd) (elf_tdata(bfd) -> num_elf_sections)
1815 #define elf_seg_map(bfd) (elf_tdata(bfd) -> o->seg_map)
1816 #define elf_next_file_pos(bfd) (elf_tdata(bfd) -> o->next_file_pos)
1817 #define elf_eh_frame_hdr(bfd) (elf_tdata(bfd) -> o->eh_frame_hdr)
1818 #define elf_linker(bfd) (elf_tdata(bfd) -> o->linker)
1819 #define elf_stack_flags(bfd) (elf_tdata(bfd) -> o->stack_flags)
1820 #define elf_shstrtab(bfd) (elf_tdata(bfd) -> o->strtab_ptr)
1821 #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section)
1822 #define elf_symtab_shndx_list(bfd) (elf_tdata(bfd) -> symtab_shndx_list)
1823 #define elf_strtab_sec(bfd) (elf_tdata(bfd) -> o->strtab_section)
1824 #define elf_shstrtab_sec(bfd) (elf_tdata(bfd) -> o->shstrtab_section)
1825 #define elf_symtab_hdr(bfd) (elf_tdata(bfd) -> symtab_hdr)
1826 #define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section)
1827 #define elf_dynversym(bfd) (elf_tdata(bfd) -> dynversym_section)
1828 #define elf_dynverdef(bfd) (elf_tdata(bfd) -> dynverdef_section)
1829 #define elf_dynverref(bfd) (elf_tdata(bfd) -> dynverref_section)
1830 #define elf_eh_frame_section(bfd) \
1831 (elf_tdata(bfd) -> eh_frame_section)
1832 #define elf_section_syms(bfd) (elf_tdata(bfd) -> o->section_syms)
1833 #define elf_num_section_syms(bfd) (elf_tdata(bfd) -> o->num_section_syms)
1834 #define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
1835 #define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
1836 #define elf_gp(bfd) (elf_tdata(bfd) -> gp)
1837 #define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size)
1838 #define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes)
1839 #define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts)
1840 #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets)
1841 #define elf_local_got_ents(bfd) (elf_tdata(bfd) -> local_got.ents)
1842 #define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name)
1843 #define elf_dt_audit(bfd) (elf_tdata(bfd) -> dt_audit)
1844 #define elf_dyn_lib_class(bfd) (elf_tdata(bfd) -> dyn_lib_class)
1845 #define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab)
1846 #define elf_flags_init(bfd) (elf_tdata(bfd) -> o->flags_init)
1847 #define elf_known_obj_attributes(bfd) (elf_tdata (bfd) -> known_obj_attributes)
1848 #define elf_other_obj_attributes(bfd) (elf_tdata (bfd) -> other_obj_attributes)
1849 #define elf_known_obj_attributes_proc(bfd) \
1850 (elf_known_obj_attributes (bfd) [OBJ_ATTR_PROC])
1851 #define elf_other_obj_attributes_proc(bfd) \
1852 (elf_other_obj_attributes (bfd) [OBJ_ATTR_PROC])
1854 extern void _bfd_elf_swap_verdef_in
1855 (bfd
*, const Elf_External_Verdef
*, Elf_Internal_Verdef
*);
1856 extern void _bfd_elf_swap_verdef_out
1857 (bfd
*, const Elf_Internal_Verdef
*, Elf_External_Verdef
*);
1858 extern void _bfd_elf_swap_verdaux_in
1859 (bfd
*, const Elf_External_Verdaux
*, Elf_Internal_Verdaux
*);
1860 extern void _bfd_elf_swap_verdaux_out
1861 (bfd
*, const Elf_Internal_Verdaux
*, Elf_External_Verdaux
*);
1862 extern void _bfd_elf_swap_verneed_in
1863 (bfd
*, const Elf_External_Verneed
*, Elf_Internal_Verneed
*);
1864 extern void _bfd_elf_swap_verneed_out
1865 (bfd
*, const Elf_Internal_Verneed
*, Elf_External_Verneed
*);
1866 extern void _bfd_elf_swap_vernaux_in
1867 (bfd
*, const Elf_External_Vernaux
*, Elf_Internal_Vernaux
*);
1868 extern void _bfd_elf_swap_vernaux_out
1869 (bfd
*, const Elf_Internal_Vernaux
*, Elf_External_Vernaux
*);
1870 extern void _bfd_elf_swap_versym_in
1871 (bfd
*, const Elf_External_Versym
*, Elf_Internal_Versym
*);
1872 extern void _bfd_elf_swap_versym_out
1873 (bfd
*, const Elf_Internal_Versym
*, Elf_External_Versym
*);
1875 extern unsigned int _bfd_elf_section_from_bfd_section
1876 (bfd
*, asection
*);
1877 extern char *bfd_elf_string_from_elf_section
1878 (bfd
*, unsigned, unsigned);
1879 extern Elf_Internal_Sym
*bfd_elf_get_elf_syms
1880 (bfd
*, Elf_Internal_Shdr
*, size_t, size_t, Elf_Internal_Sym
*, void *,
1881 Elf_External_Sym_Shndx
*);
1882 extern const char *bfd_elf_sym_name
1883 (bfd
*, Elf_Internal_Shdr
*, Elf_Internal_Sym
*, asection
*);
1885 extern bfd_boolean _bfd_elf_copy_private_bfd_data
1887 extern bfd_boolean _bfd_elf_print_private_bfd_data
1889 const char * _bfd_elf_get_symbol_version_string
1890 (bfd
*, asymbol
*, bfd_boolean
*);
1891 extern void bfd_elf_print_symbol
1892 (bfd
*, void *, asymbol
*, bfd_print_symbol_type
);
1894 extern unsigned int _bfd_elf_eh_frame_address_size
1895 (bfd
*, asection
*);
1896 extern bfd_byte _bfd_elf_encode_eh_address
1897 (bfd
*abfd
, struct bfd_link_info
*info
, asection
*osec
, bfd_vma offset
,
1898 asection
*loc_sec
, bfd_vma loc_offset
, bfd_vma
*encoded
);
1899 extern bfd_boolean _bfd_elf_can_make_relative
1900 (bfd
*input_bfd
, struct bfd_link_info
*info
, asection
*eh_frame_section
);
1902 extern enum elf_reloc_type_class _bfd_elf_reloc_type_class
1903 (const struct bfd_link_info
*, const asection
*,
1904 const Elf_Internal_Rela
*);
1905 extern bfd_vma _bfd_elf_rela_local_sym
1906 (bfd
*, Elf_Internal_Sym
*, asection
**, Elf_Internal_Rela
*);
1907 extern bfd_vma _bfd_elf_rel_local_sym
1908 (bfd
*, Elf_Internal_Sym
*, asection
**, bfd_vma
);
1909 extern bfd_vma _bfd_elf_section_offset
1910 (bfd
*, struct bfd_link_info
*, asection
*, bfd_vma
);
1912 extern unsigned long bfd_elf_hash
1914 extern unsigned long bfd_elf_gnu_hash
1917 extern bfd_reloc_status_type bfd_elf_generic_reloc
1918 (bfd
*, arelent
*, asymbol
*, void *, asection
*, bfd
*, char **);
1919 extern bfd_boolean bfd_elf_allocate_object
1920 (bfd
*, size_t, enum elf_target_id
);
1921 extern bfd_boolean bfd_elf_make_object
1923 extern bfd_boolean bfd_elf_mkcorefile
1925 extern bfd_boolean _bfd_elf_make_section_from_shdr
1926 (bfd
*, Elf_Internal_Shdr
*, const char *, int);
1927 extern bfd_boolean _bfd_elf_make_section_from_phdr
1928 (bfd
*, Elf_Internal_Phdr
*, int, const char *);
1929 extern struct bfd_hash_entry
*_bfd_elf_link_hash_newfunc
1930 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *);
1931 extern struct bfd_link_hash_table
*_bfd_elf_link_hash_table_create
1933 extern void _bfd_elf_link_hash_table_free
1935 extern void _bfd_elf_link_hash_copy_indirect
1936 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
1937 struct elf_link_hash_entry
*);
1938 extern void _bfd_elf_link_hash_hide_symbol
1939 (struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd_boolean
);
1940 extern bfd_boolean _bfd_elf_link_hash_fixup_symbol
1941 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
1942 extern bfd_boolean _bfd_elf_link_hash_table_init
1943 (struct elf_link_hash_table
*, bfd
*,
1944 struct bfd_hash_entry
*(*)
1945 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *),
1946 unsigned int, enum elf_target_id
);
1947 extern bfd_boolean _bfd_elf_slurp_version_tables
1948 (bfd
*, bfd_boolean
);
1949 extern bfd_boolean _bfd_elf_merge_sections
1950 (bfd
*, struct bfd_link_info
*);
1951 extern bfd_boolean _bfd_elf_match_sections_by_type
1952 (bfd
*, const asection
*, bfd
*, const asection
*);
1953 extern bfd_boolean bfd_elf_is_group_section
1954 (bfd
*, const struct bfd_section
*);
1955 extern bfd_boolean _bfd_elf_section_already_linked
1956 (bfd
*, asection
*, struct bfd_link_info
*);
1957 extern void bfd_elf_set_group_contents
1958 (bfd
*, asection
*, void *);
1959 extern unsigned int _bfd_elf_filter_global_symbols
1960 (bfd
*, struct bfd_link_info
*, asymbol
**, long);
1961 extern asection
*_bfd_elf_check_kept_section
1962 (asection
*, struct bfd_link_info
*);
1963 #define _bfd_elf_link_just_syms _bfd_generic_link_just_syms
1964 extern void _bfd_elf_copy_link_hash_symbol_type
1965 (bfd
*, struct bfd_link_hash_entry
*, struct bfd_link_hash_entry
*);
1966 extern bfd_boolean _bfd_elf_size_group_sections
1967 (struct bfd_link_info
*);
1968 extern bfd_boolean _bfd_elf_fixup_group_sections
1969 (bfd
*, asection
*);
1970 extern bfd_boolean _bfd_elf_copy_private_header_data
1972 extern bfd_boolean _bfd_elf_copy_private_symbol_data
1973 (bfd
*, asymbol
*, bfd
*, asymbol
*);
1974 #define _bfd_generic_init_private_section_data \
1975 _bfd_elf_init_private_section_data
1976 extern bfd_boolean _bfd_elf_init_private_section_data
1977 (bfd
*, asection
*, bfd
*, asection
*, struct bfd_link_info
*);
1978 extern bfd_boolean _bfd_elf_copy_private_section_data
1979 (bfd
*, asection
*, bfd
*, asection
*);
1980 extern bfd_boolean _bfd_elf_write_object_contents
1982 extern bfd_boolean _bfd_elf_write_corefile_contents
1984 extern bfd_boolean _bfd_elf_set_section_contents
1985 (bfd
*, sec_ptr
, const void *, file_ptr
, bfd_size_type
);
1986 extern long _bfd_elf_get_symtab_upper_bound
1988 extern long _bfd_elf_canonicalize_symtab
1989 (bfd
*, asymbol
**);
1990 extern long _bfd_elf_get_dynamic_symtab_upper_bound
1992 extern long _bfd_elf_canonicalize_dynamic_symtab
1993 (bfd
*, asymbol
**);
1994 extern long _bfd_elf_get_synthetic_symtab
1995 (bfd
*, long, asymbol
**, long, asymbol
**, asymbol
**);
1996 extern long _bfd_elf_get_reloc_upper_bound
1998 extern long _bfd_elf_canonicalize_reloc
1999 (bfd
*, sec_ptr
, arelent
**, asymbol
**);
2000 extern asection
* _bfd_elf_get_dynamic_reloc_section
2001 (bfd
*, asection
*, bfd_boolean
);
2002 extern asection
* _bfd_elf_make_dynamic_reloc_section
2003 (asection
*, bfd
*, unsigned int, bfd
*, bfd_boolean
);
2004 extern long _bfd_elf_get_dynamic_reloc_upper_bound
2006 extern long _bfd_elf_canonicalize_dynamic_reloc
2007 (bfd
*, arelent
**, asymbol
**);
2008 extern asymbol
*_bfd_elf_make_empty_symbol
2010 extern void _bfd_elf_get_symbol_info
2011 (bfd
*, asymbol
*, symbol_info
*);
2012 extern bfd_boolean _bfd_elf_is_local_label_name
2013 (bfd
*, const char *);
2014 extern alent
*_bfd_elf_get_lineno
2016 extern bfd_boolean _bfd_elf_set_arch_mach
2017 (bfd
*, enum bfd_architecture
, unsigned long);
2018 extern bfd_boolean _bfd_elf_find_nearest_line
2019 (bfd
*, asymbol
**, asection
*, bfd_vma
,
2020 const char **, const char **, unsigned int *, unsigned int *);
2021 extern bfd_boolean _bfd_elf_find_line
2022 (bfd
*, asymbol
**, asymbol
*, const char **, unsigned int *);
2023 extern bfd_boolean _bfd_elf_find_inliner_info
2024 (bfd
*, const char **, const char **, unsigned int *);
2025 extern asymbol
*_bfd_elf_find_function
2026 (bfd
*, asymbol
**, asection
*, bfd_vma
, const char **, const char **);
2027 #define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols
2028 #define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
2029 extern int _bfd_elf_sizeof_headers
2030 (bfd
*, struct bfd_link_info
*);
2031 extern bfd_boolean _bfd_elf_new_section_hook
2032 (bfd
*, asection
*);
2033 extern const struct bfd_elf_special_section
*_bfd_elf_get_special_section
2034 (const char *, const struct bfd_elf_special_section
*, unsigned int);
2035 extern const struct bfd_elf_special_section
*_bfd_elf_get_sec_type_attr
2036 (bfd
*, asection
*);
2038 /* If the target doesn't have reloc handling written yet: */
2039 extern void _bfd_elf_no_info_to_howto
2040 (bfd
*, arelent
*, Elf_Internal_Rela
*);
2042 extern bfd_boolean bfd_section_from_shdr
2043 (bfd
*, unsigned int shindex
);
2044 extern bfd_boolean bfd_section_from_phdr
2045 (bfd
*, Elf_Internal_Phdr
*, int);
2047 extern int _bfd_elf_symbol_from_bfd_symbol
2048 (bfd
*, asymbol
**);
2050 extern Elf_Internal_Sym
*bfd_sym_from_r_symndx
2051 (struct sym_cache
*, bfd
*, unsigned long);
2052 extern asection
*bfd_section_from_elf_index
2053 (bfd
*, unsigned int);
2055 extern struct elf_strtab_hash
* _bfd_elf_strtab_init
2057 extern void _bfd_elf_strtab_free
2058 (struct elf_strtab_hash
*);
2059 extern size_t _bfd_elf_strtab_add
2060 (struct elf_strtab_hash
*, const char *, bfd_boolean
);
2061 extern void _bfd_elf_strtab_addref
2062 (struct elf_strtab_hash
*, size_t);
2063 extern void _bfd_elf_strtab_delref
2064 (struct elf_strtab_hash
*, size_t);
2065 extern unsigned int _bfd_elf_strtab_refcount
2066 (struct elf_strtab_hash
*, size_t);
2067 extern void _bfd_elf_strtab_clear_all_refs
2068 (struct elf_strtab_hash
*);
2069 extern void *_bfd_elf_strtab_save
2070 (struct elf_strtab_hash
*);
2071 extern void _bfd_elf_strtab_restore
2072 (struct elf_strtab_hash
*, void *);
2073 extern bfd_size_type _bfd_elf_strtab_size
2074 (struct elf_strtab_hash
*);
2075 extern bfd_size_type _bfd_elf_strtab_offset
2076 (struct elf_strtab_hash
*, size_t);
2077 extern bfd_boolean _bfd_elf_strtab_emit
2078 (bfd
*, struct elf_strtab_hash
*);
2079 extern void _bfd_elf_strtab_finalize
2080 (struct elf_strtab_hash
*);
2082 extern bfd_boolean bfd_elf_parse_eh_frame_entries
2083 (bfd
*, struct bfd_link_info
*);
2084 extern bfd_boolean _bfd_elf_parse_eh_frame_entry
2085 (struct bfd_link_info
*, asection
*, struct elf_reloc_cookie
*);
2086 extern void _bfd_elf_parse_eh_frame
2087 (bfd
*, struct bfd_link_info
*, asection
*, struct elf_reloc_cookie
*);
2088 extern bfd_boolean _bfd_elf_end_eh_frame_parsing
2089 (struct bfd_link_info
*info
);
2091 extern bfd_boolean _bfd_elf_discard_section_eh_frame
2092 (bfd
*, struct bfd_link_info
*, asection
*,
2093 bfd_boolean (*) (bfd_vma
, void *), struct elf_reloc_cookie
*);
2094 extern bfd_boolean _bfd_elf_discard_section_eh_frame_hdr
2095 (bfd
*, struct bfd_link_info
*);
2096 extern bfd_vma _bfd_elf_eh_frame_section_offset
2097 (bfd
*, struct bfd_link_info
*, asection
*, bfd_vma
);
2098 extern bfd_boolean _bfd_elf_write_section_eh_frame
2099 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
2100 bfd_boolean _bfd_elf_write_section_eh_frame_entry
2101 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
2102 extern bfd_boolean
_bfd_elf_fixup_eh_frame_hdr (struct bfd_link_info
*);
2103 extern bfd_boolean _bfd_elf_write_section_eh_frame_hdr
2104 (bfd
*, struct bfd_link_info
*);
2105 extern bfd_boolean _bfd_elf_eh_frame_present
2106 (struct bfd_link_info
*);
2107 extern bfd_boolean _bfd_elf_eh_frame_entry_present
2108 (struct bfd_link_info
*);
2109 extern bfd_boolean _bfd_elf_maybe_strip_eh_frame_hdr
2110 (struct bfd_link_info
*);
2112 extern bfd_boolean
_bfd_elf_hash_symbol (struct elf_link_hash_entry
*);
2114 extern long _bfd_elf_link_lookup_local_dynindx
2115 (struct bfd_link_info
*, bfd
*, long);
2116 extern bfd_boolean _bfd_elf_compute_section_file_positions
2117 (bfd
*, struct bfd_link_info
*);
2118 extern file_ptr _bfd_elf_assign_file_position_for_section
2119 (Elf_Internal_Shdr
*, file_ptr
, bfd_boolean
);
2121 extern bfd_boolean _bfd_elf_validate_reloc
2124 extern bfd_boolean _bfd_elf_link_create_dynamic_sections
2125 (bfd
*, struct bfd_link_info
*);
2126 extern bfd_boolean _bfd_elf_link_omit_section_dynsym
2127 (bfd
*, struct bfd_link_info
*, asection
*);
2128 extern bfd_boolean _bfd_elf_create_dynamic_sections
2129 (bfd
*, struct bfd_link_info
*);
2130 extern bfd_boolean _bfd_elf_create_got_section
2131 (bfd
*, struct bfd_link_info
*);
2132 extern asection
*_bfd_elf_section_for_symbol
2133 (struct elf_reloc_cookie
*, unsigned long, bfd_boolean
);
2134 extern struct elf_link_hash_entry
*_bfd_elf_define_linkage_sym
2135 (bfd
*, struct bfd_link_info
*, asection
*, const char *);
2136 extern void _bfd_elf_init_1_index_section
2137 (bfd
*, struct bfd_link_info
*);
2138 extern void _bfd_elf_init_2_index_sections
2139 (bfd
*, struct bfd_link_info
*);
2141 extern bfd_boolean _bfd_elfcore_make_pseudosection
2142 (bfd
*, char *, size_t, ufile_ptr
);
2143 extern char *_bfd_elfcore_strndup
2144 (bfd
*, char *, size_t);
2146 extern Elf_Internal_Rela
*_bfd_elf_link_read_relocs
2147 (bfd
*, asection
*, void *, Elf_Internal_Rela
*, bfd_boolean
);
2149 extern bfd_boolean _bfd_elf_link_output_relocs
2150 (bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*,
2151 struct elf_link_hash_entry
**);
2153 extern bfd_boolean _bfd_elf_adjust_dynamic_copy
2154 (struct bfd_link_info
*, struct elf_link_hash_entry
*, asection
*);
2156 extern bfd_boolean _bfd_elf_dynamic_symbol_p
2157 (struct elf_link_hash_entry
*, struct bfd_link_info
*, bfd_boolean
);
2159 extern bfd_boolean _bfd_elf_symbol_refs_local_p
2160 (struct elf_link_hash_entry
*, struct bfd_link_info
*, bfd_boolean
);
2162 extern bfd_reloc_status_type bfd_elf_perform_complex_relocation
2163 (bfd
*, asection
*, bfd_byte
*, Elf_Internal_Rela
*, bfd_vma
);
2165 extern bfd_boolean _bfd_elf_setup_sections
2168 extern void _bfd_elf_post_process_headers (bfd
* , struct bfd_link_info
*);
2170 extern const bfd_target
*bfd_elf32_object_p
2172 extern const bfd_target
*bfd_elf32_core_file_p
2174 extern char *bfd_elf32_core_file_failing_command
2176 extern int bfd_elf32_core_file_failing_signal
2178 extern bfd_boolean bfd_elf32_core_file_matches_executable_p
2180 extern int bfd_elf32_core_file_pid
2183 extern bfd_boolean bfd_elf32_swap_symbol_in
2184 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
2185 extern void bfd_elf32_swap_symbol_out
2186 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
2187 extern void bfd_elf32_swap_reloc_in
2188 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2189 extern void bfd_elf32_swap_reloc_out
2190 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2191 extern void bfd_elf32_swap_reloca_in
2192 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2193 extern void bfd_elf32_swap_reloca_out
2194 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2195 extern void bfd_elf32_swap_phdr_in
2196 (bfd
*, const Elf32_External_Phdr
*, Elf_Internal_Phdr
*);
2197 extern void bfd_elf32_swap_phdr_out
2198 (bfd
*, const Elf_Internal_Phdr
*, Elf32_External_Phdr
*);
2199 extern void bfd_elf32_swap_dyn_in
2200 (bfd
*, const void *, Elf_Internal_Dyn
*);
2201 extern void bfd_elf32_swap_dyn_out
2202 (bfd
*, const Elf_Internal_Dyn
*, void *);
2203 extern long bfd_elf32_slurp_symbol_table
2204 (bfd
*, asymbol
**, bfd_boolean
);
2205 extern bfd_boolean bfd_elf32_write_shdrs_and_ehdr
2207 extern int bfd_elf32_write_out_phdrs
2208 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
2209 extern bfd_boolean bfd_elf32_checksum_contents
2210 (bfd
* , void (*) (const void *, size_t, void *), void *);
2211 extern void bfd_elf32_write_relocs
2212 (bfd
*, asection
*, void *);
2213 extern bfd_boolean bfd_elf32_slurp_reloc_table
2214 (bfd
*, asection
*, asymbol
**, bfd_boolean
);
2216 extern const bfd_target
*bfd_elf64_object_p
2218 extern const bfd_target
*bfd_elf64_core_file_p
2220 extern char *bfd_elf64_core_file_failing_command
2222 extern int bfd_elf64_core_file_failing_signal
2224 extern bfd_boolean bfd_elf64_core_file_matches_executable_p
2226 extern int bfd_elf64_core_file_pid
2229 extern bfd_boolean bfd_elf64_swap_symbol_in
2230 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
2231 extern void bfd_elf64_swap_symbol_out
2232 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
2233 extern void bfd_elf64_swap_reloc_in
2234 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2235 extern void bfd_elf64_swap_reloc_out
2236 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2237 extern void bfd_elf64_swap_reloca_in
2238 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2239 extern void bfd_elf64_swap_reloca_out
2240 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2241 extern void bfd_elf64_swap_phdr_in
2242 (bfd
*, const Elf64_External_Phdr
*, Elf_Internal_Phdr
*);
2243 extern void bfd_elf64_swap_phdr_out
2244 (bfd
*, const Elf_Internal_Phdr
*, Elf64_External_Phdr
*);
2245 extern void bfd_elf64_swap_dyn_in
2246 (bfd
*, const void *, Elf_Internal_Dyn
*);
2247 extern void bfd_elf64_swap_dyn_out
2248 (bfd
*, const Elf_Internal_Dyn
*, void *);
2249 extern long bfd_elf64_slurp_symbol_table
2250 (bfd
*, asymbol
**, bfd_boolean
);
2251 extern bfd_boolean bfd_elf64_write_shdrs_and_ehdr
2253 extern int bfd_elf64_write_out_phdrs
2254 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
2255 extern bfd_boolean bfd_elf64_checksum_contents
2256 (bfd
* , void (*) (const void *, size_t, void *), void *);
2257 extern void bfd_elf64_write_relocs
2258 (bfd
*, asection
*, void *);
2259 extern bfd_boolean bfd_elf64_slurp_reloc_table
2260 (bfd
*, asection
*, asymbol
**, bfd_boolean
);
2262 extern bfd_boolean _bfd_elf_default_relocs_compatible
2263 (const bfd_target
*, const bfd_target
*);
2265 extern bfd_boolean _bfd_elf_relocs_compatible
2266 (const bfd_target
*, const bfd_target
*);
2267 extern bfd_boolean _bfd_elf_notice_as_needed
2268 (bfd
*, struct bfd_link_info
*, enum notice_asneeded_action
);
2270 extern struct elf_link_hash_entry
*_bfd_elf_archive_symbol_lookup
2271 (bfd
*, struct bfd_link_info
*, const char *);
2272 extern bfd_boolean bfd_elf_link_add_symbols
2273 (bfd
*, struct bfd_link_info
*);
2274 extern bfd_boolean _bfd_elf_add_dynamic_entry
2275 (struct bfd_link_info
*, bfd_vma
, bfd_vma
);
2276 extern bfd_boolean _bfd_elf_link_check_relocs
2277 (bfd
*, struct bfd_link_info
*);
2279 extern bfd_boolean bfd_elf_link_record_dynamic_symbol
2280 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
2282 extern int bfd_elf_link_record_local_dynamic_symbol
2283 (struct bfd_link_info
*, bfd
*, long);
2285 extern bfd_boolean _bfd_elf_close_and_cleanup
2288 extern bfd_boolean _bfd_elf_common_definition
2289 (Elf_Internal_Sym
*);
2291 extern unsigned int _bfd_elf_common_section_index
2294 extern asection
*_bfd_elf_common_section
2297 extern bfd_vma _bfd_elf_default_got_elt_size
2298 (bfd
*, struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd
*,
2301 extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn
2302 (bfd
*, arelent
*, struct bfd_symbol
*, void *,
2303 asection
*, bfd
*, char **);
2305 extern bfd_boolean bfd_elf_final_link
2306 (bfd
*, struct bfd_link_info
*);
2308 extern void _bfd_elf_gc_keep
2309 (struct bfd_link_info
*info
);
2311 extern bfd_boolean bfd_elf_gc_mark_dynamic_ref_symbol
2312 (struct elf_link_hash_entry
*h
, void *inf
);
2314 extern bfd_boolean bfd_elf_gc_sections
2315 (bfd
*, struct bfd_link_info
*);
2317 extern bfd_boolean bfd_elf_gc_record_vtinherit
2318 (bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
);
2320 extern bfd_boolean bfd_elf_gc_record_vtentry
2321 (bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
);
2323 extern asection
*_bfd_elf_gc_mark_hook
2324 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
2325 struct elf_link_hash_entry
*, Elf_Internal_Sym
*);
2327 extern asection
*_bfd_elf_gc_mark_rsec
2328 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
,
2329 struct elf_reloc_cookie
*, bfd_boolean
*);
2331 extern bfd_boolean _bfd_elf_gc_mark_reloc
2332 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
,
2333 struct elf_reloc_cookie
*);
2335 extern bfd_boolean _bfd_elf_gc_mark_fdes
2336 (struct bfd_link_info
*, asection
*, asection
*, elf_gc_mark_hook_fn
,
2337 struct elf_reloc_cookie
*);
2339 extern bfd_boolean _bfd_elf_gc_mark
2340 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
);
2342 extern bfd_boolean _bfd_elf_gc_mark_extra_sections
2343 (struct bfd_link_info
*, elf_gc_mark_hook_fn
);
2345 extern bfd_boolean bfd_elf_gc_common_finalize_got_offsets
2346 (bfd
*, struct bfd_link_info
*);
2348 extern bfd_boolean bfd_elf_gc_common_final_link
2349 (bfd
*, struct bfd_link_info
*);
2351 extern asection
*_bfd_elf_is_start_stop
2352 (const struct bfd_link_info
*, struct elf_link_hash_entry
*);
2354 extern bfd_boolean bfd_elf_reloc_symbol_deleted_p
2357 extern struct elf_segment_map
* _bfd_elf_make_dynamic_segment
2358 (bfd
*, asection
*);
2360 extern bfd_boolean _bfd_elf_map_sections_to_segments
2361 (bfd
*, struct bfd_link_info
*);
2363 extern bfd_boolean
_bfd_elf_is_function_type (unsigned int);
2365 extern bfd_size_type
_bfd_elf_maybe_function_sym (const asymbol
*, asection
*,
2368 extern asection
*_bfd_elf_get_reloc_section (asection
*);
2370 extern int bfd_elf_get_default_section_type (flagword
);
2372 extern bfd_boolean bfd_elf_lookup_section_flags
2373 (struct bfd_link_info
*, struct flag_info
*, asection
*);
2375 extern Elf_Internal_Phdr
* _bfd_elf_find_segment_containing_section
2376 (bfd
* abfd
, asection
* section
);
2378 /* PowerPC @tls opcode transform/validate. */
2379 extern unsigned int _bfd_elf_ppc_at_tls_transform
2380 (unsigned int, unsigned int);
2381 /* PowerPC @tprel opcode transform/validate. */
2382 extern unsigned int _bfd_elf_ppc_at_tprel_transform
2383 (unsigned int, unsigned int);
2384 /* PowerPC elf_object_p tweak. */
2385 extern bfd_boolean
_bfd_elf_ppc_set_arch (bfd
*);
2387 /* Exported interface for writing elf corefile notes. */
2388 extern char *elfcore_write_note
2389 (bfd
*, char *, int *, const char *, int, const void *, int);
2390 extern char *elfcore_write_prpsinfo
2391 (bfd
*, char *, int *, const char *, const char *);
2392 extern char *elfcore_write_prstatus
2393 (bfd
*, char *, int *, long, int, const void *);
2394 extern char * elfcore_write_pstatus
2395 (bfd
*, char *, int *, long, int, const void *);
2396 extern char *elfcore_write_prfpreg
2397 (bfd
*, char *, int *, const void *, int);
2398 extern char *elfcore_write_prxfpreg
2399 (bfd
*, char *, int *, const void *, int);
2400 extern char *elfcore_write_xstatereg
2401 (bfd
*, char *, int *, const void *, int);
2402 extern char *elfcore_write_ppc_vmx
2403 (bfd
*, char *, int *, const void *, int);
2404 extern char *elfcore_write_ppc_vsx
2405 (bfd
*, char *, int *, const void *, int);
2406 extern char *elfcore_write_s390_timer
2407 (bfd
*, char *, int *, const void *, int);
2408 extern char *elfcore_write_s390_todcmp
2409 (bfd
*, char *, int *, const void *, int);
2410 extern char *elfcore_write_s390_todpreg
2411 (bfd
*, char *, int *, const void *, int);
2412 extern char *elfcore_write_s390_ctrs
2413 (bfd
*, char *, int *, const void *, int);
2414 extern char *elfcore_write_s390_prefix
2415 (bfd
*, char *, int *, const void *, int);
2416 extern char *elfcore_write_s390_last_break
2417 (bfd
*, char *, int *, const void *, int);
2418 extern char *elfcore_write_s390_system_call
2419 (bfd
*, char *, int *, const void *, int);
2420 extern char *elfcore_write_s390_tdb
2421 (bfd
*, char *, int *, const void *, int);
2422 extern char *elfcore_write_s390_vxrs_low
2423 (bfd
*, char *, int *, const void *, int);
2424 extern char *elfcore_write_s390_vxrs_high
2425 (bfd
*, char *, int *, const void *, int);
2426 extern char *elfcore_write_arm_vfp
2427 (bfd
*, char *, int *, const void *, int);
2428 extern char *elfcore_write_aarch_tls
2429 (bfd
*, char *, int *, const void *, int);
2430 extern char *elfcore_write_aarch_hw_break
2431 (bfd
*, char *, int *, const void *, int);
2432 extern char *elfcore_write_aarch_hw_watch
2433 (bfd
*, char *, int *, const void *, int);
2434 extern char *elfcore_write_lwpstatus
2435 (bfd
*, char *, int *, long, int, const void *);
2436 extern char *elfcore_write_register_note
2437 (bfd
*, char *, int *, const char *, const void *, int);
2439 /* Internal structure which holds information to be included in the
2440 PRPSINFO section of Linux core files.
2442 This is an "internal" structure in the sense that it should be used
2443 to pass information to BFD (via the `elfcore_write_linux_prpsinfo'
2444 function), so things like endianess shouldn't be an issue. This
2445 structure will eventually be converted in one of the
2446 `elf_external_linux_*' structures and written out to an output bfd
2447 by one of the functions declared below. */
2449 struct elf_internal_linux_prpsinfo
2451 char pr_state
; /* Numeric process state. */
2452 char pr_sname
; /* Char for pr_state. */
2453 char pr_zomb
; /* Zombie. */
2454 char pr_nice
; /* Nice val. */
2455 unsigned long pr_flag
; /* Flags. */
2456 unsigned int pr_uid
;
2457 unsigned int pr_gid
;
2458 int pr_pid
, pr_ppid
, pr_pgrp
, pr_sid
;
2459 char pr_fname
[16 + 1]; /* Filename of executable. */
2460 char pr_psargs
[80 + 1]; /* Initial part of arg list. */
2463 /* Linux/most 32-bit archs. */
2464 extern char *elfcore_write_linux_prpsinfo32
2465 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
2467 /* Linux/most 64-bit archs. */
2468 extern char *elfcore_write_linux_prpsinfo64
2469 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
2471 /* Linux/PPC32 uses different layout compared to most archs. */
2472 extern char *elfcore_write_ppc_linux_prpsinfo32
2473 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
2475 extern bfd
*_bfd_elf32_bfd_from_remote_memory
2476 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
2477 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, bfd_size_type
));
2478 extern bfd
*_bfd_elf64_bfd_from_remote_memory
2479 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
2480 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, bfd_size_type
));
2482 extern bfd_vma
bfd_elf_obj_attr_size (bfd
*);
2483 extern void bfd_elf_set_obj_attr_contents (bfd
*, bfd_byte
*, bfd_vma
);
2484 extern int bfd_elf_get_obj_attr_int (bfd
*, int, unsigned int);
2485 extern void bfd_elf_add_obj_attr_int (bfd
*, int, unsigned int, unsigned int);
2486 #define bfd_elf_add_proc_attr_int(BFD, TAG, VALUE) \
2487 bfd_elf_add_obj_attr_int ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2488 extern void bfd_elf_add_obj_attr_string (bfd
*, int, unsigned int, const char *);
2489 #define bfd_elf_add_proc_attr_string(BFD, TAG, VALUE) \
2490 bfd_elf_add_obj_attr_string ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2491 extern void bfd_elf_add_obj_attr_int_string (bfd
*, int, unsigned int,
2492 unsigned int, const char *);
2493 #define bfd_elf_add_proc_attr_int_string(BFD, TAG, INTVAL, STRVAL) \
2494 bfd_elf_add_obj_attr_int_string ((BFD), OBJ_ATTR_PROC, (TAG), \
2497 extern char *_bfd_elf_attr_strdup (bfd
*, const char *);
2498 extern void _bfd_elf_copy_obj_attributes (bfd
*, bfd
*);
2499 extern int _bfd_elf_obj_attrs_arg_type (bfd
*, int, unsigned int);
2500 extern void _bfd_elf_parse_attributes (bfd
*, Elf_Internal_Shdr
*);
2501 extern bfd_boolean
_bfd_elf_merge_object_attributes (bfd
*, bfd
*);
2502 extern bfd_boolean
_bfd_elf_merge_unknown_attribute_low (bfd
*, bfd
*, int);
2503 extern bfd_boolean
_bfd_elf_merge_unknown_attribute_list (bfd
*, bfd
*);
2504 extern Elf_Internal_Shdr
*_bfd_elf_single_rel_hdr (asection
*sec
);
2506 /* The linker may need to keep track of the number of relocs that it
2507 decides to copy as dynamic relocs in check_relocs for each symbol.
2508 This is so that it can later discard them if they are found to be
2509 unnecessary. We can store the information in a field extending the
2510 regular ELF linker hash table. */
2512 struct elf_dyn_relocs
2514 struct elf_dyn_relocs
*next
;
2516 /* The input section of the reloc. */
2519 /* Total number of relocs copied for the input section. */
2520 bfd_size_type count
;
2522 /* Number of pc-relative relocs copied for the input section. */
2523 bfd_size_type pc_count
;
2526 extern bfd_boolean _bfd_elf_create_ifunc_sections
2527 (bfd
*, struct bfd_link_info
*);
2528 extern bfd_boolean _bfd_elf_allocate_ifunc_dyn_relocs
2529 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
2530 struct elf_dyn_relocs
**, bfd_boolean
*, unsigned int,
2531 unsigned int, unsigned int, bfd_boolean
);
2532 extern long _bfd_elf_ifunc_get_synthetic_symtab
2533 (bfd
*, long, asymbol
**, long, asymbol
**, asymbol
**, asection
*,
2534 bfd_vma
*(*) (bfd
*, asymbol
**, asection
*, asection
*));
2536 extern void elf_append_rela (bfd
*, asection
*, Elf_Internal_Rela
*);
2537 extern void elf_append_rel (bfd
*, asection
*, Elf_Internal_Rela
*);
2539 extern bfd_vma
elf64_r_info (bfd_vma
, bfd_vma
);
2540 extern bfd_vma
elf64_r_sym (bfd_vma
);
2541 extern bfd_vma
elf32_r_info (bfd_vma
, bfd_vma
);
2542 extern bfd_vma
elf32_r_sym (bfd_vma
);
2544 /* Large common section. */
2545 extern asection _bfd_elf_large_com_section
;
2547 /* Hash for local symbol with the first section id, ID, in the input
2548 file and the local symbol index, SYM. */
2549 #define ELF_LOCAL_SYMBOL_HASH(ID, SYM) \
2550 (((((ID) & 0xff) << 24) | (((ID) & 0xff00) << 8)) \
2551 ^ (SYM) ^ ((ID) >> 16))
2553 /* This is the condition under which finish_dynamic_symbol will be called.
2554 If our finish_dynamic_symbol isn't called, we'll need to do something
2555 about initializing any .plt and .got entries in relocate_section. */
2556 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
2558 && ((SHARED) || !(H)->forced_local) \
2559 && ((H)->dynindx != -1 || (H)->forced_local))
2561 /* This macro is to avoid lots of duplicated code in the body
2562 of xxx_relocate_section() in the various elfxx-xxxx.c files. */
2563 #define RELOC_FOR_GLOBAL_SYMBOL(info, input_bfd, input_section, rel, \
2564 r_symndx, symtab_hdr, sym_hashes, \
2565 h, sec, relocation, \
2566 unresolved_reloc, warned, ignored) \
2569 /* It seems this can happen with erroneous or unsupported \
2570 input (mixing a.out and elf in an archive, for example.) */ \
2571 if (sym_hashes == NULL) \
2574 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; \
2576 if (info->wrap_hash != NULL \
2577 && (input_section->flags & SEC_DEBUGGING) != 0) \
2578 h = ((struct elf_link_hash_entry *) \
2579 unwrap_hash_lookup (info, input_bfd, &h->root)); \
2581 while (h->root.type == bfd_link_hash_indirect \
2582 || h->root.type == bfd_link_hash_warning) \
2583 h = (struct elf_link_hash_entry *) h->root.u.i.link; \
2587 unresolved_reloc = FALSE; \
2589 if (h->root.type == bfd_link_hash_defined \
2590 || h->root.type == bfd_link_hash_defweak) \
2592 sec = h->root.u.def.section; \
2594 || sec->output_section == NULL) \
2595 /* Set a flag that will be cleared later if we find a \
2596 relocation value for this symbol. output_section \
2597 is typically NULL for symbols satisfied by a shared \
2599 unresolved_reloc = TRUE; \
2601 relocation = (h->root.u.def.value \
2602 + sec->output_section->vma \
2603 + sec->output_offset); \
2605 else if (h->root.type == bfd_link_hash_undefweak) \
2607 else if (info->unresolved_syms_in_objects == RM_IGNORE \
2608 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) \
2610 else if (!bfd_link_relocatable (info)) \
2613 err = (info->unresolved_syms_in_objects == RM_GENERATE_ERROR \
2614 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT); \
2615 (*info->callbacks->undefined_symbol) (info, \
2616 h->root.root.string, \
2619 rel->r_offset, err); \
2622 (void) unresolved_reloc; \
2628 /* This macro is to avoid lots of duplicated code in the body of the
2629 loop over relocations in xxx_relocate_section() in the various
2632 Handle relocations against symbols from removed linkonce sections,
2633 or sections discarded by a linker script. When doing a relocatable
2634 link, we remove such relocations. Otherwise, we just want the
2635 section contents zeroed and avoid any special processing. */
2636 #define RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
2637 rel, count, relend, \
2638 howto, index, contents) \
2641 _bfd_clear_contents (howto, input_bfd, input_section, \
2642 contents + rel[index].r_offset); \
2644 if (bfd_link_relocatable (info) \
2645 && (input_section->flags & SEC_DEBUGGING)) \
2647 /* Only remove relocations in debug sections since other \
2648 sections may require relocations. */ \
2649 Elf_Internal_Shdr *rel_hdr; \
2651 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
2653 /* Avoid empty output section. */ \
2654 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
2656 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
2657 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
2658 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
2660 memmove (rel, rel + count, \
2661 (relend - rel - count) * sizeof (*rel)); \
2663 input_section->reloc_count--; \
2670 for (i_ = 0; i_ < count; i_++) \
2672 rel[i_].r_info = 0; \
2673 rel[i_].r_addend = 0; \
2679 /* Will a symbol be bound to the definition within the shared
2680 library, if any. A unique symbol can never be bound locally. */
2681 #define SYMBOLIC_BIND(INFO, H) \
2682 (!(H)->unique_global \
2683 && ((INFO)->symbolic || ((INFO)->dynamic && !(H)->dynamic)))
2688 #endif /* _LIBELF_H_ */