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
;
527 bfd_size_type local_dynsymcount
;
529 /* The string table of dynamic symbols, which becomes the .dynstr
531 struct elf_strtab_hash
*dynstr
;
533 /* The number of symbol strings found in the link which must be put
534 into the .strtab section. */
535 bfd_size_type strtabcount
;
537 /* The array size of the symbol string table, which becomes the
539 bfd_size_type strtabsize
;
541 /* The array of strings, which becomes the .strtab section. */
542 struct elf_sym_strtab
*strtab
;
544 /* The number of buckets in the hash table in the .hash section.
545 This is based on the number of dynamic symbols. */
546 bfd_size_type bucketcount
;
548 /* A linked list of DT_NEEDED names found in dynamic objects
549 included in the link. */
550 struct bfd_link_needed_list
*needed
;
552 /* Sections in the output bfd that provides a section symbol
553 to be used by relocations emitted against local symbols.
554 Most targets will not use data_index_section. */
555 asection
*text_index_section
;
556 asection
*data_index_section
;
558 /* The _GLOBAL_OFFSET_TABLE_ symbol. */
559 struct elf_link_hash_entry
*hgot
;
561 /* The _PROCEDURE_LINKAGE_TABLE_ symbol. */
562 struct elf_link_hash_entry
*hplt
;
564 /* The _DYNAMIC symbol. */
565 struct elf_link_hash_entry
*hdynamic
;
567 /* A pointer to information used to merge SEC_MERGE sections. */
570 /* Used to link stabs in sections. */
571 struct stab_info stab_info
;
573 /* Used by eh_frame code when editing .eh_frame. */
574 struct eh_frame_hdr_info eh_info
;
576 /* A linked list of local symbols to be added to .dynsym. */
577 struct elf_link_local_dynamic_entry
*dynlocal
;
579 /* A linked list of DT_RPATH/DT_RUNPATH names found in dynamic
580 objects included in the link. */
581 struct bfd_link_needed_list
*runpath
;
583 /* Cached first output tls section and size of PT_TLS segment. */
585 bfd_size_type tls_size
;
587 /* A linked list of BFD's loaded in the link. */
588 struct elf_link_loaded_list
*loaded
;
590 /* Short-cuts to get to dynamic linker sections. */
603 /* Look up an entry in an ELF linker hash table. */
605 #define elf_link_hash_lookup(table, string, create, copy, follow) \
606 ((struct elf_link_hash_entry *) \
607 bfd_link_hash_lookup (&(table)->root, (string), (create), \
610 /* Traverse an ELF linker hash table. */
612 #define elf_link_hash_traverse(table, func, info) \
613 (bfd_link_hash_traverse \
615 (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func), \
618 /* Get the ELF linker hash table from a link_info structure. */
620 #define elf_hash_table(p) ((struct elf_link_hash_table *) ((p)->hash))
622 #define elf_hash_table_id(table) ((table) -> hash_table_id)
624 /* Returns TRUE if the hash table is a struct elf_link_hash_table. */
625 #define is_elf_hash_table(htab) \
626 (((struct bfd_link_hash_table *) (htab))->type == bfd_link_elf_hash_table)
628 /* Used by bfd_sym_from_r_symndx to cache a small number of local
630 #define LOCAL_SYM_CACHE_SIZE 32
634 unsigned long indx
[LOCAL_SYM_CACHE_SIZE
];
635 Elf_Internal_Sym sym
[LOCAL_SYM_CACHE_SIZE
];
638 /* Constant information held for an ELF backend. */
640 struct elf_size_info
{
641 unsigned char sizeof_ehdr
, sizeof_phdr
, sizeof_shdr
;
642 unsigned char sizeof_rel
, sizeof_rela
, sizeof_sym
, sizeof_dyn
, sizeof_note
;
644 /* The size of entries in the .hash section. */
645 unsigned char sizeof_hash_entry
;
647 /* The number of internal relocations to allocate per external
649 unsigned char int_rels_per_ext_rel
;
650 /* We use some fixed size arrays. This should be large enough to
651 handle all back-ends. */
652 #define MAX_INT_RELS_PER_EXT_REL 3
654 unsigned char arch_size
, log_file_align
;
655 unsigned char elfclass
, ev_current
;
656 int (*write_out_phdrs
)
657 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
659 (*write_shdrs_and_ehdr
) (bfd
*);
660 bfd_boolean (*checksum_contents
)
661 (bfd
* , void (*) (const void *, size_t, void *), void *);
663 (bfd
*, asection
*, void *);
664 bfd_boolean (*swap_symbol_in
)
665 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
666 void (*swap_symbol_out
)
667 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
668 bfd_boolean (*slurp_reloc_table
)
669 (bfd
*, asection
*, asymbol
**, bfd_boolean
);
670 long (*slurp_symbol_table
)
671 (bfd
*, asymbol
**, bfd_boolean
);
673 (bfd
*, const void *, Elf_Internal_Dyn
*);
675 (bfd
*, const Elf_Internal_Dyn
*, void *);
677 /* This function is called to swap in a REL relocation. If an
678 external relocation corresponds to more than one internal
679 relocation, then all relocations are swapped in at once. */
680 void (*swap_reloc_in
)
681 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
683 /* This function is called to swap out a REL relocation. */
684 void (*swap_reloc_out
)
685 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
687 /* This function is called to swap in a RELA relocation. If an
688 external relocation corresponds to more than one internal
689 relocation, then all relocations are swapped in at once. */
690 void (*swap_reloca_in
)
691 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
693 /* This function is called to swap out a RELA relocation. */
694 void (*swap_reloca_out
)
695 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
698 #define elf_symbol_from(ABFD,S) \
699 (((S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \
700 && (S)->the_bfd->tdata.elf_obj_data != 0) \
701 ? (elf_symbol_type *) (S) \
704 enum elf_reloc_type_class
{
706 reloc_class_relative
,
712 struct elf_reloc_cookie
714 Elf_Internal_Rela
*rels
, *rel
, *relend
;
715 Elf_Internal_Sym
*locsyms
;
719 struct elf_link_hash_entry
**sym_hashes
;
721 bfd_boolean bad_symtab
;
724 /* The level of IRIX compatibility we're striving for. */
732 /* Mapping of ELF section names and types. */
733 struct bfd_elf_special_section
736 unsigned int prefix_length
;
737 /* 0 means name must match PREFIX exactly.
738 -1 means name must start with PREFIX followed by an arbitrary string.
739 -2 means name must match PREFIX exactly or consist of PREFIX followed
740 by a dot then anything.
741 > 0 means name must start with the first PREFIX_LENGTH chars of
742 PREFIX and finish with the last SUFFIX_LENGTH chars of PREFIX. */
743 signed int suffix_length
;
748 enum action_discarded
754 typedef asection
* (*elf_gc_mark_hook_fn
)
755 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
756 struct elf_link_hash_entry
*, Elf_Internal_Sym
*);
758 struct elf_backend_data
760 /* The architecture for this backend. */
761 enum bfd_architecture arch
;
763 /* An identifier used to distinguish different target specific
764 extensions to elf_obj_tdata and elf_link_hash_table structures. */
765 enum elf_target_id target_id
;
767 /* The ELF machine code (EM_xxxx) for this backend. */
768 int elf_machine_code
;
773 /* The maximum page size for this backend. */
776 /* The minimum page size for this backend. An input object will not be
777 considered page aligned unless its sections are correctly aligned for
778 pages at least this large. May be smaller than maxpagesize. */
781 /* The common page size for this backend. */
782 bfd_vma commonpagesize
;
784 /* The BFD flags applied to sections created for dynamic linking. */
785 flagword dynamic_sec_flags
;
787 /* Architecture-specific data for this backend.
788 This is actually a pointer to some type like struct elf_ARCH_data. */
789 const void *arch_data
;
791 /* A function to translate an ELF RELA relocation to a BFD arelent
793 void (*elf_info_to_howto
)
794 (bfd
*, arelent
*, Elf_Internal_Rela
*);
796 /* A function to translate an ELF REL relocation to a BFD arelent
798 void (*elf_info_to_howto_rel
)
799 (bfd
*, arelent
*, Elf_Internal_Rela
*);
801 /* A function to determine whether a symbol is global when
802 partitioning the symbol table into local and global symbols.
803 This should be NULL for most targets, in which case the correct
804 thing will be done. MIPS ELF, at least on the Irix 5, has
805 special requirements. */
806 bfd_boolean (*elf_backend_sym_is_global
)
809 /* The remaining functions are hooks which are called only if they
812 /* A function to permit a backend specific check on whether a
813 particular BFD format is relevant for an object file, and to
814 permit the backend to set any global information it wishes. When
815 this is called elf_elfheader is set, but anything else should be
816 used with caution. If this returns FALSE, the check_format
817 routine will return a bfd_error_wrong_format error. */
818 bfd_boolean (*elf_backend_object_p
)
821 /* A function to do additional symbol processing when reading the
822 ELF symbol table. This is where any processor-specific special
823 section indices are handled. */
824 void (*elf_backend_symbol_processing
)
827 /* A function to do additional symbol processing after reading the
828 entire ELF symbol table. */
829 bfd_boolean (*elf_backend_symbol_table_processing
)
830 (bfd
*, elf_symbol_type
*, unsigned int);
832 /* A function to set the type of the info field. Processor-specific
833 types should be handled here. */
834 int (*elf_backend_get_symbol_type
)
835 (Elf_Internal_Sym
*, int);
837 /* A function to return the linker hash table entry of a symbol that
838 might be satisfied by an archive symbol. */
839 struct elf_link_hash_entry
* (*elf_backend_archive_symbol_lookup
)
840 (bfd
*, struct bfd_link_info
*, const char *);
842 /* Return true if local section symbols should have a non-null st_name.
843 NULL implies false. */
844 bfd_boolean (*elf_backend_name_local_section_symbols
)
847 /* A function to do additional processing on the ELF section header
848 just before writing it out. This is used to set the flags and
849 type fields for some sections, or to actually write out data for
851 bfd_boolean (*elf_backend_section_processing
)
852 (bfd
*, Elf_Internal_Shdr
*);
854 /* A function to handle unusual section types when creating BFD
855 sections from ELF sections. */
856 bfd_boolean (*elf_backend_section_from_shdr
)
857 (bfd
*, Elf_Internal_Shdr
*, const char *, int);
859 /* A function to convert machine dependent ELF section header flags to
860 BFD internal section header flags. */
861 bfd_boolean (*elf_backend_section_flags
)
862 (flagword
*, const Elf_Internal_Shdr
*);
864 /* A function that returns a struct containing ELF section flags and
865 type for the given BFD section. */
866 const struct bfd_elf_special_section
* (*get_sec_type_attr
)
869 /* A function to handle unusual program segment types when creating BFD
870 sections from ELF program segments. */
871 bfd_boolean (*elf_backend_section_from_phdr
)
872 (bfd
*, Elf_Internal_Phdr
*, int, const char *);
874 /* A function to set up the ELF section header for a BFD section in
875 preparation for writing it out. This is where the flags and type
876 fields are set for unusual sections. */
877 bfd_boolean (*elf_backend_fake_sections
)
878 (bfd
*, Elf_Internal_Shdr
*, asection
*);
880 /* A function to get the ELF section index for a BFD section. If
881 this returns TRUE, the section was found. If it is a normal ELF
882 section, *RETVAL should be left unchanged. If it is not a normal
883 ELF section *RETVAL should be set to the SHN_xxxx index. */
884 bfd_boolean (*elf_backend_section_from_bfd_section
)
885 (bfd
*, asection
*, int *retval
);
887 /* If this field is not NULL, it is called by the add_symbols phase
888 of a link just before adding a symbol to the global linker hash
889 table. It may modify any of the fields as it wishes. If *NAME
890 is set to NULL, the symbol will be skipped rather than being
891 added to the hash table. This function is responsible for
892 handling all processor dependent symbol bindings and section
893 indices, and must set at least *FLAGS and *SEC for each processor
894 dependent case; failure to do so will cause a link error. */
895 bfd_boolean (*elf_add_symbol_hook
)
896 (bfd
*abfd
, struct bfd_link_info
*info
, Elf_Internal_Sym
*,
897 const char **name
, flagword
*flags
, asection
**sec
, bfd_vma
*value
);
899 /* If this field is not NULL, it is called by the elf_link_output_sym
900 phase of a link for each symbol which will appear in the object file.
901 On error, this function returns 0. 1 is returned when the symbol
902 should be output, 2 is returned when the symbol should be discarded. */
903 int (*elf_backend_link_output_symbol_hook
)
904 (struct bfd_link_info
*info
, const char *, Elf_Internal_Sym
*,
905 asection
*, struct elf_link_hash_entry
*);
907 /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend
908 linker the first time it encounters a dynamic object in the link.
909 This function must create any sections required for dynamic
910 linking. The ABFD argument is a dynamic object. The .interp,
911 .dynamic, .dynsym, .dynstr, and .hash functions have already been
912 created, and this function may modify the section flags if
913 desired. This function will normally create the .got and .plt
914 sections, but different backends have different requirements. */
915 bfd_boolean (*elf_backend_create_dynamic_sections
)
916 (bfd
*abfd
, struct bfd_link_info
*info
);
918 /* When creating a shared library, determine whether to omit the
919 dynamic symbol for the section. */
920 bfd_boolean (*elf_backend_omit_section_dynsym
)
921 (bfd
*output_bfd
, struct bfd_link_info
*info
, asection
*osec
);
923 /* Return TRUE if relocations of targets are compatible to the extent
924 that CHECK_RELOCS will properly process them. PR 4424. */
925 bfd_boolean (*relocs_compatible
) (const bfd_target
*, const bfd_target
*);
927 /* The CHECK_RELOCS function is called by the add_symbols phase of
928 the ELF backend linker. It is called once for each section with
929 relocs of an object file, just after the symbols for the object
930 file have been added to the global linker hash table. The
931 function must look through the relocs and do any special handling
932 required. This generally means allocating space in the global
933 offset table, and perhaps allocating space for a reloc. The
934 relocs are always passed as Rela structures; if the section
935 actually uses Rel structures, the r_addend field will always be
937 bfd_boolean (*check_relocs
)
938 (bfd
*abfd
, struct bfd_link_info
*info
, asection
*o
,
939 const Elf_Internal_Rela
*relocs
);
941 /* The CHECK_DIRECTIVES function is called once per input file by
942 the add_symbols phase of the ELF backend linker. The function
943 must inspect the bfd and create any additional symbols according
944 to any custom directives in the bfd. */
945 bfd_boolean (*check_directives
)
946 (bfd
*abfd
, struct bfd_link_info
*info
);
948 /* The NOTICE_AS_NEEDED function is called as the linker is about to
949 handle an as-needed lib (ACT = notice_as_needed), and after the
950 linker has decided to keep the lib (ACT = notice_needed) or when
951 the lib is not needed (ACT = notice_not_needed). */
952 bfd_boolean (*notice_as_needed
)
953 (bfd
*abfd
, struct bfd_link_info
*info
, enum notice_asneeded_action act
);
955 /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
956 linker for every symbol which is defined by a dynamic object and
957 referenced by a regular object. This is called after all the
958 input files have been seen, but before the SIZE_DYNAMIC_SECTIONS
959 function has been called. The hash table entry should be
960 bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be
961 defined in a section from a dynamic object. Dynamic object
962 sections are not included in the final link, and this function is
963 responsible for changing the value to something which the rest of
964 the link can deal with. This will normally involve adding an
965 entry to the .plt or .got or some such section, and setting the
966 symbol to point to that. */
967 bfd_boolean (*elf_backend_adjust_dynamic_symbol
)
968 (struct bfd_link_info
*info
, struct elf_link_hash_entry
*h
);
970 /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker
971 after all the linker input files have been seen but before the
972 section sizes have been set. This is called after
973 ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS. */
974 bfd_boolean (*elf_backend_always_size_sections
)
975 (bfd
*output_bfd
, struct bfd_link_info
*info
);
977 /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend
978 linker after all the linker input files have been seen but before
979 the sections sizes have been set. This is called after
980 ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols.
981 It is only called when linking against a dynamic object. It must
982 set the sizes of the dynamic sections, and may fill in their
983 contents as well. The generic ELF linker can handle the .dynsym,
984 .dynstr and .hash sections. This function must handle the
985 .interp section and any sections created by the
986 CREATE_DYNAMIC_SECTIONS entry point. */
987 bfd_boolean (*elf_backend_size_dynamic_sections
)
988 (bfd
*output_bfd
, struct bfd_link_info
*info
);
990 /* Set TEXT_INDEX_SECTION and DATA_INDEX_SECTION, the output sections
991 we keep to use as a base for relocs and symbols. */
992 void (*elf_backend_init_index_section
)
993 (bfd
*output_bfd
, struct bfd_link_info
*info
);
995 /* The RELOCATE_SECTION function is called by the ELF backend linker
996 to handle the relocations for a section.
998 The relocs are always passed as Rela structures; if the section
999 actually uses Rel structures, the r_addend field will always be
1002 This function is responsible for adjust the section contents as
1003 necessary, and (if using Rela relocs and generating a
1004 relocatable output file) adjusting the reloc addend as
1007 This function does not have to worry about setting the reloc
1008 address or the reloc symbol index.
1010 LOCAL_SYMS is a pointer to the swapped in local symbols.
1012 LOCAL_SECTIONS is an array giving the section in the input file
1013 corresponding to the st_shndx field of each local symbol.
1015 The global hash table entry for the global symbols can be found
1016 via elf_sym_hashes (input_bfd).
1018 When generating relocatable output, this function must handle
1019 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
1020 going to be the section symbol corresponding to the output
1021 section, which means that the addend must be adjusted
1024 Returns FALSE on error, TRUE on success, 2 if successful and
1025 relocations should be written for this section. */
1026 int (*elf_backend_relocate_section
)
1027 (bfd
*output_bfd
, struct bfd_link_info
*info
, bfd
*input_bfd
,
1028 asection
*input_section
, bfd_byte
*contents
, Elf_Internal_Rela
*relocs
,
1029 Elf_Internal_Sym
*local_syms
, asection
**local_sections
);
1031 /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend
1032 linker just before it writes a symbol out to the .dynsym section.
1033 The processor backend may make any required adjustment to the
1034 symbol. It may also take the opportunity to set contents of the
1035 dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on
1036 all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called
1037 on those symbols which are defined by a dynamic object. */
1038 bfd_boolean (*elf_backend_finish_dynamic_symbol
)
1039 (bfd
*output_bfd
, struct bfd_link_info
*info
,
1040 struct elf_link_hash_entry
*h
, Elf_Internal_Sym
*sym
);
1042 /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend
1043 linker just before it writes all the dynamic sections out to the
1044 output file. The FINISH_DYNAMIC_SYMBOL will have been called on
1045 all dynamic symbols. */
1046 bfd_boolean (*elf_backend_finish_dynamic_sections
)
1047 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1049 /* A function to do any beginning processing needed for the ELF file
1050 before building the ELF headers and computing file positions. */
1051 void (*elf_backend_begin_write_processing
)
1052 (bfd
*, struct bfd_link_info
*);
1054 /* A function to do any final processing needed for the ELF file
1055 before writing it out. The LINKER argument is TRUE if this BFD
1056 was created by the ELF backend linker. */
1057 void (*elf_backend_final_write_processing
)
1058 (bfd
*, bfd_boolean linker
);
1060 /* This function is called by get_program_header_size. It should
1061 return the number of additional program segments which this BFD
1062 will need. It should return -1 on error. */
1063 int (*elf_backend_additional_program_headers
)
1064 (bfd
*, struct bfd_link_info
*);
1066 /* This function is called to modify an existing segment map in a
1067 backend specific fashion. */
1068 bfd_boolean (*elf_backend_modify_segment_map
)
1069 (bfd
*, struct bfd_link_info
*);
1071 /* This function is called to modify program headers just before
1072 they are written. */
1073 bfd_boolean (*elf_backend_modify_program_headers
)
1074 (bfd
*, struct bfd_link_info
*);
1076 /* This function is called before section garbage collection to
1077 mark entry symbol sections. */
1079 (struct bfd_link_info
*);
1081 /* This function is called during section garbage collection to
1082 mark sections that define global symbols. */
1083 bfd_boolean (*gc_mark_dynamic_ref
)
1084 (struct elf_link_hash_entry
*, void *);
1086 /* This function is called during section gc to discover the section a
1087 particular relocation refers to. */
1088 elf_gc_mark_hook_fn gc_mark_hook
;
1090 /* This function, if defined, is called after the first gc marking pass
1091 to allow the backend to mark additional sections. */
1092 bfd_boolean (*gc_mark_extra_sections
)
1093 (struct bfd_link_info
*, elf_gc_mark_hook_fn
);
1095 /* This function, if defined, is called during the sweep phase of gc
1096 in order that a backend might update any data structures it might
1098 bfd_boolean (*gc_sweep_hook
)
1099 (bfd
*, struct bfd_link_info
*, asection
*, const Elf_Internal_Rela
*);
1101 /* This function, if defined, is called after the ELF headers have
1102 been created. This allows for things like the OS and ABI versions
1104 void (*elf_backend_post_process_headers
)
1105 (bfd
*, struct bfd_link_info
*);
1107 /* This function, if defined, prints a symbol to file and returns the
1108 name of the symbol to be printed. It should return NULL to fall
1109 back to default symbol printing. */
1110 const char *(*elf_backend_print_symbol_all
)
1111 (bfd
*, void *, asymbol
*);
1113 /* This function, if defined, is called after all local symbols and
1114 global symbols converted to locals are emitted into the symtab
1115 section. It allows the backend to emit special local symbols
1116 not handled in the hash table. */
1117 bfd_boolean (*elf_backend_output_arch_local_syms
)
1118 (bfd
*, struct bfd_link_info
*, void *,
1119 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym
*, asection
*,
1120 struct elf_link_hash_entry
*));
1122 /* This function, if defined, is called after all symbols are emitted
1123 into the symtab section. It allows the backend to emit special
1124 global symbols not handled in the hash table. */
1125 bfd_boolean (*elf_backend_output_arch_syms
)
1126 (bfd
*, struct bfd_link_info
*, void *,
1127 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym
*, asection
*,
1128 struct elf_link_hash_entry
*));
1130 /* Filter what symbols of the output file to include in the import
1131 library if one is created. */
1132 unsigned int (*elf_backend_filter_implib_symbols
)
1133 (bfd
*, struct bfd_link_info
*, asymbol
**, long);
1135 /* Copy any information related to dynamic linking from a pre-existing
1136 symbol to a newly created symbol. Also called to copy flags and
1137 other back-end info to a weakdef, in which case the symbol is not
1138 newly created and plt/got refcounts and dynamic indices should not
1140 void (*elf_backend_copy_indirect_symbol
)
1141 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
1142 struct elf_link_hash_entry
*);
1144 /* Modify any information related to dynamic linking such that the
1145 symbol is not exported. */
1146 void (*elf_backend_hide_symbol
)
1147 (struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd_boolean
);
1149 /* A function to do additional symbol fixup, called by
1150 _bfd_elf_fix_symbol_flags. */
1151 bfd_boolean (*elf_backend_fixup_symbol
)
1152 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
1154 /* Merge the backend specific symbol attribute. */
1155 void (*elf_backend_merge_symbol_attribute
)
1156 (struct elf_link_hash_entry
*, const Elf_Internal_Sym
*, bfd_boolean
,
1159 /* This function, if defined, will return a string containing the
1160 name of a target-specific dynamic tag. */
1161 char *(*elf_backend_get_target_dtag
)
1164 /* Decide whether an undefined symbol is special and can be ignored.
1165 This is the case for OPTIONAL symbols on IRIX. */
1166 bfd_boolean (*elf_backend_ignore_undef_symbol
)
1167 (struct elf_link_hash_entry
*);
1169 /* Emit relocations. Overrides default routine for emitting relocs,
1170 except during a relocatable link, or if all relocs are being emitted. */
1171 bfd_boolean (*elf_backend_emit_relocs
)
1172 (bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*,
1173 struct elf_link_hash_entry
**);
1175 /* Count relocations. Not called for relocatable links
1176 or if all relocs are being preserved in the output. */
1177 unsigned int (*elf_backend_count_relocs
)
1178 (struct bfd_link_info
*, asection
*);
1180 /* Count additionals relocations. Called for relocatable links if
1181 additional relocations needs to be created. */
1182 unsigned int (*elf_backend_count_additional_relocs
)
1185 /* Say whether to sort relocs output by ld -r and ld --emit-relocs,
1186 by r_offset. If NULL, default to true. */
1187 bfd_boolean (*sort_relocs_p
)
1190 /* This function, if defined, is called when an NT_PRSTATUS note is found
1192 bfd_boolean (*elf_backend_grok_prstatus
)
1193 (bfd
*, Elf_Internal_Note
*);
1195 /* This function, if defined, is called when an NT_PSINFO or NT_PRPSINFO
1196 note is found in a core file. */
1197 bfd_boolean (*elf_backend_grok_psinfo
)
1198 (bfd
*, Elf_Internal_Note
*);
1200 /* This function, if defined, is called to write a note to a corefile. */
1201 char *(*elf_backend_write_core_note
)
1202 (bfd
*abfd
, char *buf
, int *bufsiz
, int note_type
, ...);
1204 /* This function, if defined, is called to convert target-specific
1205 section flag names into hex values. */
1206 flagword (*elf_backend_lookup_section_flags_hook
)
1209 /* This function returns class of a reloc type. */
1210 enum elf_reloc_type_class (*elf_backend_reloc_type_class
)
1211 (const struct bfd_link_info
*, const asection
*, const Elf_Internal_Rela
*);
1213 /* This function, if defined, removes information about discarded functions
1214 from other sections which mention them. */
1215 bfd_boolean (*elf_backend_discard_info
)
1216 (bfd
*, struct elf_reloc_cookie
*, struct bfd_link_info
*);
1218 /* This function, if defined, signals that the function above has removed
1219 the discarded relocations for this section. */
1220 bfd_boolean (*elf_backend_ignore_discarded_relocs
)
1223 /* What to do when ld finds relocations against symbols defined in
1224 discarded sections. */
1225 unsigned int (*action_discarded
)
1228 /* This function returns the width of FDE pointers in bytes, or 0 if
1229 that can't be determined for some reason. The default definition
1230 goes by the bfd's EI_CLASS. */
1231 unsigned int (*elf_backend_eh_frame_address_size
)
1232 (bfd
*, asection
*);
1234 /* These functions tell elf-eh-frame whether to attempt to turn
1235 absolute or lsda encodings into pc-relative ones. The default
1236 definition enables these transformations. */
1237 bfd_boolean (*elf_backend_can_make_relative_eh_frame
)
1238 (bfd
*, struct bfd_link_info
*, asection
*);
1239 bfd_boolean (*elf_backend_can_make_lsda_relative_eh_frame
)
1240 (bfd
*, struct bfd_link_info
*, asection
*);
1242 /* This function returns an encoding after computing the encoded
1243 value (and storing it in ENCODED) for the given OFFSET into OSEC,
1244 to be stored in at LOC_OFFSET into the LOC_SEC input section.
1245 The default definition chooses a 32-bit PC-relative encoding. */
1246 bfd_byte (*elf_backend_encode_eh_address
)
1247 (bfd
*abfd
, struct bfd_link_info
*info
,
1248 asection
*osec
, bfd_vma offset
,
1249 asection
*loc_sec
, bfd_vma loc_offset
,
1252 /* This function, if defined, may write out the given section.
1253 Returns TRUE if it did so and FALSE if the caller should. */
1254 bfd_boolean (*elf_backend_write_section
)
1255 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
1257 /* The level of IRIX compatibility we're striving for.
1258 MIPS ELF specific function. */
1259 irix_compat_t (*elf_backend_mips_irix_compat
)
1262 reloc_howto_type
*(*elf_backend_mips_rtype_to_howto
)
1263 (unsigned int, bfd_boolean
);
1265 /* The swapping table to use when dealing with ECOFF information.
1266 Used for the MIPS ELF .mdebug section. */
1267 const struct ecoff_debug_swap
*elf_backend_ecoff_debug_swap
;
1269 /* This function implements `bfd_elf_bfd_from_remote_memory';
1270 see elf.c, elfcode.h. */
1271 bfd
*(*elf_backend_bfd_from_remote_memory
)
1272 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
1273 int (*target_read_memory
) (bfd_vma vma
, bfd_byte
*myaddr
,
1274 bfd_size_type len
));
1276 /* This function is used by `_bfd_elf_get_synthetic_symtab';
1278 bfd_vma (*plt_sym_val
) (bfd_vma
, const asection
*, const arelent
*);
1280 /* Is symbol defined in common section? */
1281 bfd_boolean (*common_definition
) (Elf_Internal_Sym
*);
1283 /* Return a common section index for section. */
1284 unsigned int (*common_section_index
) (asection
*);
1286 /* Return a common section for section. */
1287 asection
*(*common_section
) (asection
*);
1289 /* Return TRUE if we can merge 2 definitions. */
1290 bfd_boolean (*merge_symbol
) (struct elf_link_hash_entry
*,
1291 const Elf_Internal_Sym
*, asection
**,
1292 bfd_boolean
, bfd_boolean
,
1293 bfd
*, const asection
*);
1295 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
1296 bfd_boolean (*elf_hash_symbol
) (struct elf_link_hash_entry
*);
1298 /* Return TRUE if type is a function symbol type. */
1299 bfd_boolean (*is_function_type
) (unsigned int type
);
1301 /* If the ELF symbol SYM might be a function in SEC, return the
1302 function size and set *CODE_OFF to the function's entry point,
1303 otherwise return zero. */
1304 bfd_size_type (*maybe_function_sym
) (const asymbol
*sym
, asection
*sec
,
1307 /* Return the section which RELOC_SEC applies to. */
1308 asection
*(*get_reloc_section
) (asection
*reloc_sec
);
1310 /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
1311 has a type >= SHT_LOOS. Returns TRUE if the fields were initialised,
1312 FALSE otherwise. Can be called multiple times for a given section,
1313 until it returns TRUE. Most of the times it is called ISECTION will be
1314 set to an input section that might be associated with the output section.
1315 The last time that it is called, ISECTION will be set to NULL. */
1316 bfd_boolean (*elf_backend_copy_special_section_fields
)
1317 (const bfd
*ibfd
, bfd
*obfd
, const Elf_Internal_Shdr
*isection
,
1318 Elf_Internal_Shdr
*osection
);
1320 /* Used to handle bad SHF_LINK_ORDER input. */
1321 bfd_error_handler_type link_order_error_handler
;
1323 /* Name of the PLT relocation section. */
1324 const char *relplt_name
;
1326 /* Alternate EM_xxxx machine codes for this backend. */
1327 int elf_machine_alt1
;
1328 int elf_machine_alt2
;
1330 const struct elf_size_info
*s
;
1332 /* An array of target specific special sections. */
1333 const struct bfd_elf_special_section
*special_sections
;
1335 /* The size in bytes of the header for the GOT. This includes the
1336 so-called reserved entries on some systems. */
1337 bfd_vma got_header_size
;
1339 /* The size of the GOT entry for the symbol pointed to by H if non-NULL,
1340 otherwise by the local symbol with index SYMNDX in IBFD. */
1341 bfd_vma (*got_elt_size
) (bfd
*, struct bfd_link_info
*,
1342 struct elf_link_hash_entry
*h
,
1343 bfd
*ibfd
, unsigned long symndx
);
1345 /* The vendor name to use for a processor-standard attributes section. */
1346 const char *obj_attrs_vendor
;
1348 /* The section name to use for a processor-standard attributes section. */
1349 const char *obj_attrs_section
;
1351 /* Return 1, 2 or 3 to indicate what type of arguments a
1352 processor-specific tag takes. */
1353 int (*obj_attrs_arg_type
) (int);
1355 /* The section type to use for an attributes section. */
1356 unsigned int obj_attrs_section_type
;
1358 /* This function determines the order in which any attributes are
1359 written. It must be defined for input in the range
1360 LEAST_KNOWN_OBJ_ATTRIBUTE..NUM_KNOWN_OBJ_ATTRIBUTES-1 (this range
1361 is used in order to make unity easy). The returned value is the
1362 actual tag number to place in the input position. */
1363 int (*obj_attrs_order
) (int);
1365 /* Handle merging unknown attributes; either warn and return TRUE,
1366 or give an error and return FALSE. */
1367 bfd_boolean (*obj_attrs_handle_unknown
) (bfd
*, int);
1369 /* Encoding used for compact EH tables. */
1370 int (*compact_eh_encoding
) (struct bfd_link_info
*);
1372 /* Opcode representing no unwind. */
1373 int (*cant_unwind_opcode
) (struct bfd_link_info
*);
1375 /* This is non-zero if static TLS segments require a special alignment. */
1376 unsigned static_tls_alignment
;
1378 /* Alignment for the PT_GNU_STACK segment. */
1379 unsigned stack_align
;
1381 /* Flag bits to assign to a section of type SHT_STRTAB. */
1382 unsigned long elf_strtab_flags
;
1384 /* This is TRUE if the linker should act like collect and gather
1385 global constructors and destructors by name. This is TRUE for
1386 MIPS ELF because the Irix 5 tools can not handle the .init
1388 unsigned collect
: 1;
1390 /* This is TRUE if the linker should ignore changes to the type of a
1391 symbol. This is TRUE for MIPS ELF because some Irix 5 objects
1392 record undefined functions as STT_OBJECT although the definitions
1394 unsigned type_change_ok
: 1;
1396 /* Whether the backend may use REL relocations. (Some backends use
1397 both REL and RELA relocations, and this flag is set for those
1399 unsigned may_use_rel_p
: 1;
1401 /* Whether the backend may use RELA relocations. (Some backends use
1402 both REL and RELA relocations, and this flag is set for those
1404 unsigned may_use_rela_p
: 1;
1406 /* Whether the default relocation type is RELA. If a backend with
1407 this flag set wants REL relocations for a particular section,
1408 it must note that explicitly. Similarly, if this flag is clear,
1409 and the backend wants RELA relocations for a particular
1411 unsigned default_use_rela_p
: 1;
1413 /* True if PLT and copy relocations should be RELA by default. */
1414 unsigned rela_plts_and_copies_p
: 1;
1416 /* Set if RELA relocations for a relocatable link can be handled by
1417 generic code. Backends that set this flag need do nothing in the
1418 backend relocate_section routine for relocatable linking. */
1419 unsigned rela_normal
: 1;
1421 /* TRUE if addresses "naturally" sign extend. This is used when
1422 swapping in from Elf32 when BFD64. */
1423 unsigned sign_extend_vma
: 1;
1425 unsigned want_got_plt
: 1;
1426 unsigned plt_readonly
: 1;
1427 unsigned want_plt_sym
: 1;
1428 unsigned plt_not_loaded
: 1;
1429 unsigned plt_alignment
: 4;
1430 unsigned can_gc_sections
: 1;
1431 unsigned can_refcount
: 1;
1432 unsigned want_got_sym
: 1;
1433 unsigned want_dynbss
: 1;
1435 /* Targets which do not support physical addressing often require
1436 that the p_paddr field in the section header to be set to zero.
1437 This field indicates whether this behavior is required. */
1438 unsigned want_p_paddr_set_to_zero
: 1;
1440 /* True if an object file lacking a .note.GNU-stack section
1441 should be assumed to be requesting exec stack. At least one
1442 other file in the link needs to have a .note.GNU-stack section
1443 for a PT_GNU_STACK segment to be created. */
1444 unsigned default_execstack
: 1;
1446 /* True if elf_section_data(sec)->this_hdr.contents is sec->rawsize
1447 in length rather than sec->size in length, if sec->rawsize is
1448 non-zero and smaller than sec->size. */
1449 unsigned caches_rawsize
: 1;
1451 /* Address of protected data defined in the shared library may be
1452 external, i.e., due to copy relocation. */
1453 unsigned extern_protected_data
: 1;
1456 /* Information about reloc sections associated with a bfd_elf_section_data
1458 struct bfd_elf_section_reloc_data
1460 /* The ELF header for the reloc section associated with this
1462 Elf_Internal_Shdr
*hdr
;
1463 /* The number of relocations currently assigned to HDR. */
1465 /* The ELF section number of the reloc section. Only used for an
1468 /* Used by the backend linker to store the symbol hash table entries
1469 associated with relocs against global symbols. */
1470 struct elf_link_hash_entry
**hashes
;
1473 /* Information stored for each BFD section in an ELF file. This
1474 structure is allocated by elf_new_section_hook. */
1476 struct bfd_elf_section_data
1478 /* The ELF header for this section. */
1479 Elf_Internal_Shdr this_hdr
;
1481 /* INPUT_SECTION_FLAGS if specified in the linker script. */
1482 struct flag_info
*section_flag_info
;
1484 /* Information about the REL and RELA reloc sections associated
1485 with this section, if any. */
1486 struct bfd_elf_section_reloc_data rel
, rela
;
1488 /* The ELF section number of this section. */
1491 /* Used by the backend linker when generating a shared library to
1492 record the dynamic symbol index for a section symbol
1493 corresponding to this section. A value of 0 means that there is
1494 no dynamic symbol for this section. */
1497 /* A pointer to the linked-to section for SHF_LINK_ORDER. */
1498 asection
*linked_to
;
1500 /* A pointer to the swapped relocs. If the section uses REL relocs,
1501 rather than RELA, all the r_addend fields will be zero. This
1502 pointer may be NULL. It is used by the backend linker. */
1503 Elf_Internal_Rela
*relocs
;
1505 /* A pointer to a linked list tracking dynamic relocs copied for
1509 /* A pointer to the bfd section used for dynamic relocs. */
1513 /* Group name, if this section is a member of a group. */
1516 /* Group signature sym, if this is the SHT_GROUP section. */
1517 struct bfd_symbol
*id
;
1520 /* For a member of a group, points to the SHT_GROUP section.
1521 NULL for the SHT_GROUP section itself and non-group sections. */
1522 asection
*sec_group
;
1524 /* A linked list of member sections in the group. Circular when used by
1525 the linker. For the SHT_GROUP section, points at first member. */
1526 asection
*next_in_group
;
1528 /* The FDEs associated with this section. The u.fde.next_in_section
1529 field acts as a chain pointer. */
1530 struct eh_cie_fde
*fde_list
;
1532 /* Link from a text section to its .eh_frame_entry section. */
1533 asection
*eh_frame_entry
;
1535 /* A pointer used for various section optimizations. */
1539 #define elf_section_data(sec) ((struct bfd_elf_section_data*)(sec)->used_by_bfd)
1540 #define elf_linked_to_section(sec) (elf_section_data(sec)->linked_to)
1541 #define elf_section_type(sec) (elf_section_data(sec)->this_hdr.sh_type)
1542 #define elf_section_flags(sec) (elf_section_data(sec)->this_hdr.sh_flags)
1543 #define elf_group_name(sec) (elf_section_data(sec)->group.name)
1544 #define elf_group_id(sec) (elf_section_data(sec)->group.id)
1545 #define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group)
1546 #define elf_fde_list(sec) (elf_section_data(sec)->fde_list)
1547 #define elf_sec_group(sec) (elf_section_data(sec)->sec_group)
1548 #define elf_section_eh_frame_entry(sec) (elf_section_data(sec)->eh_frame_entry)
1550 #define xvec_get_elf_backend_data(xvec) \
1551 ((const struct elf_backend_data *) (xvec)->backend_data)
1553 #define get_elf_backend_data(abfd) \
1554 xvec_get_elf_backend_data ((abfd)->xvec)
1556 /* The least object attributes (within an attributes subsection) known
1557 for any target. Some code assumes that the value 0 is not used and
1558 the field for that attribute can instead be used as a marker to
1559 indicate that attributes have been initialized. */
1560 #define LEAST_KNOWN_OBJ_ATTRIBUTE 2
1562 /* The maximum number of known object attributes for any target. */
1563 #define NUM_KNOWN_OBJ_ATTRIBUTES 71
1565 /* The value of an object attribute. The type indicates whether the attribute
1566 holds and integer, a string, or both. It can also indicate that there can
1567 be no default (i.e. all values must be written to file, even zero). */
1569 typedef struct obj_attribute
1571 #define ATTR_TYPE_FLAG_INT_VAL (1 << 0)
1572 #define ATTR_TYPE_FLAG_STR_VAL (1 << 1)
1573 #define ATTR_TYPE_FLAG_NO_DEFAULT (1 << 2)
1575 #define ATTR_TYPE_HAS_INT_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_INT_VAL)
1576 #define ATTR_TYPE_HAS_STR_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_STR_VAL)
1577 #define ATTR_TYPE_HAS_NO_DEFAULT(TYPE) ((TYPE) & ATTR_TYPE_FLAG_NO_DEFAULT)
1584 typedef struct obj_attribute_list
1586 struct obj_attribute_list
*next
;
1589 } obj_attribute_list
;
1591 /* Object attributes may either be defined by the processor ABI, index
1592 OBJ_ATTR_PROC in the *_obj_attributes arrays, or be GNU-specific
1593 (and possibly also processor-specific), index OBJ_ATTR_GNU. */
1594 #define OBJ_ATTR_PROC 0
1595 #define OBJ_ATTR_GNU 1
1596 #define OBJ_ATTR_FIRST OBJ_ATTR_PROC
1597 #define OBJ_ATTR_LAST OBJ_ATTR_GNU
1599 /* The following object attribute tags are taken as generic, for all
1600 targets and for "gnu" where there is no target standard. */
1607 Tag_compatibility
= 32
1610 /* The following struct stores information about every SystemTap section
1611 found in the object file. */
1614 struct sdt_note
*next
;
1619 /* tdata information grabbed from an elf core file. */
1620 struct core_elf_obj_tdata
1629 /* Extra tdata information held for output ELF BFDs. */
1630 struct output_elf_obj_tdata
1632 struct elf_segment_map
*seg_map
;
1633 struct elf_strtab_hash
*strtab_ptr
;
1635 /* STT_SECTION symbols for each section */
1636 asymbol
**section_syms
;
1638 /* Used to determine if PT_GNU_EH_FRAME segment header should be
1640 asection
*eh_frame_hdr
;
1642 /* NT_GNU_BUILD_ID note type info. */
1645 bfd_boolean (*after_write_object_contents
) (bfd
*);
1650 /* Records the result of `get_program_header_size'. */
1651 bfd_size_type program_header_size
;
1653 /* Used when laying out sections. */
1654 file_ptr next_file_pos
;
1656 int num_section_syms
;
1657 unsigned int shstrtab_section
, strtab_section
;
1659 /* Segment flags for the PT_GNU_STACK segment. */
1660 unsigned int stack_flags
;
1662 /* This is set to TRUE if the object was created by the backend
1666 /* Used to determine if the e_flags field has been initialized */
1667 bfd_boolean flags_init
;
1670 /* Indicate if the bfd contains symbols that have the STT_GNU_IFUNC
1671 symbol type or STB_GNU_UNIQUE binding. Used to set the osabi
1672 field in the ELF header structure. */
1673 enum elf_gnu_symbols
1675 elf_gnu_symbol_none
= 0,
1676 elf_gnu_symbol_any
= 1 << 0,
1677 elf_gnu_symbol_ifunc
= (elf_gnu_symbol_any
| 1 << 1),
1678 elf_gnu_symbol_unique
= (elf_gnu_symbol_any
| 1 << 2),
1679 elf_gnu_symbol_all
= (elf_gnu_symbol_ifunc
| elf_gnu_symbol_unique
)
1682 typedef struct elf_section_list
1684 Elf_Internal_Shdr hdr
;
1686 struct elf_section_list
* next
;
1690 /* Some private data is stashed away for future use using the tdata pointer
1691 in the bfd structure. */
1693 struct elf_obj_tdata
1695 Elf_Internal_Ehdr elf_header
[1]; /* Actual data, but ref like ptr */
1696 Elf_Internal_Shdr
**elf_sect_ptr
;
1697 Elf_Internal_Phdr
*phdr
;
1698 Elf_Internal_Shdr symtab_hdr
;
1699 Elf_Internal_Shdr shstrtab_hdr
;
1700 Elf_Internal_Shdr strtab_hdr
;
1701 Elf_Internal_Shdr dynsymtab_hdr
;
1702 Elf_Internal_Shdr dynstrtab_hdr
;
1703 Elf_Internal_Shdr dynversym_hdr
;
1704 Elf_Internal_Shdr dynverref_hdr
;
1705 Elf_Internal_Shdr dynverdef_hdr
;
1706 elf_section_list
* symtab_shndx_list
;
1707 bfd_vma gp
; /* The gp value */
1708 unsigned int gp_size
; /* The gp size */
1709 unsigned int num_elf_sections
; /* elf_sect_ptr size */
1711 /* A mapping from external symbols to entries in the linker hash
1712 table, used when linking. This is indexed by the symbol index
1713 minus the sh_info field of the symbol table header. */
1714 struct elf_link_hash_entry
**sym_hashes
;
1716 /* Track usage and final offsets of GOT entries for local symbols.
1717 This array is indexed by symbol index. Elements are used
1718 identically to "got" in struct elf_link_hash_entry. */
1721 bfd_signed_vma
*refcounts
;
1723 struct got_entry
**ents
;
1726 /* The linker ELF emulation code needs to let the backend ELF linker
1727 know what filename should be used for a dynamic object if the
1728 dynamic object is found using a search. The emulation code then
1729 sometimes needs to know what name was actually used. Until the
1730 file has been added to the linker symbol table, this field holds
1731 the name the linker wants. After it has been added, it holds the
1732 name actually used, which will be the DT_SONAME entry if there is
1734 const char *dt_name
;
1736 /* The linker emulation needs to know what audit libs
1737 are used by a dynamic object. */
1738 const char *dt_audit
;
1740 /* Used by find_nearest_line entry point. */
1743 /* A place to stash dwarf1 info for this bfd. */
1744 struct dwarf1_debug
*dwarf1_find_line_info
;
1746 /* A place to stash dwarf2 info for this bfd. */
1747 void *dwarf2_find_line_info
;
1749 /* Stash away info for yet another find line/function variant. */
1750 void *elf_find_function_cache
;
1752 /* Number of symbol version definitions we are about to emit. */
1753 unsigned int cverdefs
;
1755 /* Number of symbol version references we are about to emit. */
1756 unsigned int cverrefs
;
1758 /* Symbol version definitions in external objects. */
1759 Elf_Internal_Verdef
*verdef
;
1761 /* Symbol version references to external objects. */
1762 Elf_Internal_Verneed
*verref
;
1764 /* A pointer to the .eh_frame section. */
1765 asection
*eh_frame_section
;
1767 /* Symbol buffer. */
1770 obj_attribute known_obj_attributes
[2][NUM_KNOWN_OBJ_ATTRIBUTES
];
1771 obj_attribute_list
*other_obj_attributes
[2];
1773 /* Linked-list containing information about every Systemtap section
1774 found in the object file. Each section corresponds to one entry
1776 struct sdt_note
*sdt_note_head
;
1778 Elf_Internal_Shdr
**group_sect_ptr
;
1781 unsigned int symtab_section
, dynsymtab_section
;
1782 unsigned int dynversym_section
, dynverdef_section
, dynverref_section
;
1784 /* An identifier used to distinguish different target
1785 specific extensions to this structure. */
1786 enum elf_target_id object_id
;
1788 /* Whether a dyanmic object was specified normally on the linker
1789 command line, or was specified when --as-needed was in effect,
1790 or was found via a DT_NEEDED entry. */
1791 enum dynamic_lib_link_class dyn_lib_class
;
1793 /* Irix 5 often screws up the symbol table, sorting local symbols
1794 after global symbols. This flag is set if the symbol table in
1795 this BFD appears to be screwed up. If it is, we ignore the
1796 sh_info field in the symbol table header, and always read all the
1798 bfd_boolean bad_symtab
;
1800 enum elf_gnu_symbols has_gnu_symbols
;
1802 /* Information grabbed from an elf core file. */
1803 struct core_elf_obj_tdata
*core
;
1805 /* More information held for output ELF BFDs. */
1806 struct output_elf_obj_tdata
*o
;
1809 #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
1811 #define elf_object_id(bfd) (elf_tdata(bfd) -> object_id)
1812 #define elf_program_header_size(bfd) (elf_tdata(bfd) -> o->program_header_size)
1813 #define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header)
1814 #define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr)
1815 #define elf_numsections(bfd) (elf_tdata(bfd) -> num_elf_sections)
1816 #define elf_seg_map(bfd) (elf_tdata(bfd) -> o->seg_map)
1817 #define elf_next_file_pos(bfd) (elf_tdata(bfd) -> o->next_file_pos)
1818 #define elf_eh_frame_hdr(bfd) (elf_tdata(bfd) -> o->eh_frame_hdr)
1819 #define elf_linker(bfd) (elf_tdata(bfd) -> o->linker)
1820 #define elf_stack_flags(bfd) (elf_tdata(bfd) -> o->stack_flags)
1821 #define elf_shstrtab(bfd) (elf_tdata(bfd) -> o->strtab_ptr)
1822 #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section)
1823 #define elf_symtab_shndx_list(bfd) (elf_tdata(bfd) -> symtab_shndx_list)
1824 #define elf_strtab_sec(bfd) (elf_tdata(bfd) -> o->strtab_section)
1825 #define elf_shstrtab_sec(bfd) (elf_tdata(bfd) -> o->shstrtab_section)
1826 #define elf_symtab_hdr(bfd) (elf_tdata(bfd) -> symtab_hdr)
1827 #define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section)
1828 #define elf_dynversym(bfd) (elf_tdata(bfd) -> dynversym_section)
1829 #define elf_dynverdef(bfd) (elf_tdata(bfd) -> dynverdef_section)
1830 #define elf_dynverref(bfd) (elf_tdata(bfd) -> dynverref_section)
1831 #define elf_eh_frame_section(bfd) \
1832 (elf_tdata(bfd) -> eh_frame_section)
1833 #define elf_section_syms(bfd) (elf_tdata(bfd) -> o->section_syms)
1834 #define elf_num_section_syms(bfd) (elf_tdata(bfd) -> o->num_section_syms)
1835 #define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
1836 #define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
1837 #define elf_gp(bfd) (elf_tdata(bfd) -> gp)
1838 #define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size)
1839 #define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes)
1840 #define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts)
1841 #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets)
1842 #define elf_local_got_ents(bfd) (elf_tdata(bfd) -> local_got.ents)
1843 #define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name)
1844 #define elf_dt_audit(bfd) (elf_tdata(bfd) -> dt_audit)
1845 #define elf_dyn_lib_class(bfd) (elf_tdata(bfd) -> dyn_lib_class)
1846 #define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab)
1847 #define elf_flags_init(bfd) (elf_tdata(bfd) -> o->flags_init)
1848 #define elf_known_obj_attributes(bfd) (elf_tdata (bfd) -> known_obj_attributes)
1849 #define elf_other_obj_attributes(bfd) (elf_tdata (bfd) -> other_obj_attributes)
1850 #define elf_known_obj_attributes_proc(bfd) \
1851 (elf_known_obj_attributes (bfd) [OBJ_ATTR_PROC])
1852 #define elf_other_obj_attributes_proc(bfd) \
1853 (elf_other_obj_attributes (bfd) [OBJ_ATTR_PROC])
1855 extern void _bfd_elf_swap_verdef_in
1856 (bfd
*, const Elf_External_Verdef
*, Elf_Internal_Verdef
*);
1857 extern void _bfd_elf_swap_verdef_out
1858 (bfd
*, const Elf_Internal_Verdef
*, Elf_External_Verdef
*);
1859 extern void _bfd_elf_swap_verdaux_in
1860 (bfd
*, const Elf_External_Verdaux
*, Elf_Internal_Verdaux
*);
1861 extern void _bfd_elf_swap_verdaux_out
1862 (bfd
*, const Elf_Internal_Verdaux
*, Elf_External_Verdaux
*);
1863 extern void _bfd_elf_swap_verneed_in
1864 (bfd
*, const Elf_External_Verneed
*, Elf_Internal_Verneed
*);
1865 extern void _bfd_elf_swap_verneed_out
1866 (bfd
*, const Elf_Internal_Verneed
*, Elf_External_Verneed
*);
1867 extern void _bfd_elf_swap_vernaux_in
1868 (bfd
*, const Elf_External_Vernaux
*, Elf_Internal_Vernaux
*);
1869 extern void _bfd_elf_swap_vernaux_out
1870 (bfd
*, const Elf_Internal_Vernaux
*, Elf_External_Vernaux
*);
1871 extern void _bfd_elf_swap_versym_in
1872 (bfd
*, const Elf_External_Versym
*, Elf_Internal_Versym
*);
1873 extern void _bfd_elf_swap_versym_out
1874 (bfd
*, const Elf_Internal_Versym
*, Elf_External_Versym
*);
1876 extern unsigned int _bfd_elf_section_from_bfd_section
1877 (bfd
*, asection
*);
1878 extern char *bfd_elf_string_from_elf_section
1879 (bfd
*, unsigned, unsigned);
1880 extern Elf_Internal_Sym
*bfd_elf_get_elf_syms
1881 (bfd
*, Elf_Internal_Shdr
*, size_t, size_t, Elf_Internal_Sym
*, void *,
1882 Elf_External_Sym_Shndx
*);
1883 extern const char *bfd_elf_sym_name
1884 (bfd
*, Elf_Internal_Shdr
*, Elf_Internal_Sym
*, asection
*);
1886 extern bfd_boolean _bfd_elf_copy_private_bfd_data
1888 extern bfd_boolean _bfd_elf_print_private_bfd_data
1890 const char * _bfd_elf_get_symbol_version_string
1891 (bfd
*, asymbol
*, bfd_boolean
*);
1892 extern void bfd_elf_print_symbol
1893 (bfd
*, void *, asymbol
*, bfd_print_symbol_type
);
1895 extern unsigned int _bfd_elf_eh_frame_address_size
1896 (bfd
*, asection
*);
1897 extern bfd_byte _bfd_elf_encode_eh_address
1898 (bfd
*abfd
, struct bfd_link_info
*info
, asection
*osec
, bfd_vma offset
,
1899 asection
*loc_sec
, bfd_vma loc_offset
, bfd_vma
*encoded
);
1900 extern bfd_boolean _bfd_elf_can_make_relative
1901 (bfd
*input_bfd
, struct bfd_link_info
*info
, asection
*eh_frame_section
);
1903 extern enum elf_reloc_type_class _bfd_elf_reloc_type_class
1904 (const struct bfd_link_info
*, const asection
*,
1905 const Elf_Internal_Rela
*);
1906 extern bfd_vma _bfd_elf_rela_local_sym
1907 (bfd
*, Elf_Internal_Sym
*, asection
**, Elf_Internal_Rela
*);
1908 extern bfd_vma _bfd_elf_rel_local_sym
1909 (bfd
*, Elf_Internal_Sym
*, asection
**, bfd_vma
);
1910 extern bfd_vma _bfd_elf_section_offset
1911 (bfd
*, struct bfd_link_info
*, asection
*, bfd_vma
);
1913 extern unsigned long bfd_elf_hash
1915 extern unsigned long bfd_elf_gnu_hash
1918 extern bfd_reloc_status_type bfd_elf_generic_reloc
1919 (bfd
*, arelent
*, asymbol
*, void *, asection
*, bfd
*, char **);
1920 extern bfd_boolean bfd_elf_allocate_object
1921 (bfd
*, size_t, enum elf_target_id
);
1922 extern bfd_boolean bfd_elf_make_object
1924 extern bfd_boolean bfd_elf_mkcorefile
1926 extern bfd_boolean _bfd_elf_make_section_from_shdr
1927 (bfd
*, Elf_Internal_Shdr
*, const char *, int);
1928 extern bfd_boolean _bfd_elf_make_section_from_phdr
1929 (bfd
*, Elf_Internal_Phdr
*, int, const char *);
1930 extern struct bfd_hash_entry
*_bfd_elf_link_hash_newfunc
1931 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *);
1932 extern struct bfd_link_hash_table
*_bfd_elf_link_hash_table_create
1934 extern void _bfd_elf_link_hash_table_free
1936 extern void _bfd_elf_link_hash_copy_indirect
1937 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
1938 struct elf_link_hash_entry
*);
1939 extern void _bfd_elf_link_hash_hide_symbol
1940 (struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd_boolean
);
1941 extern bfd_boolean _bfd_elf_link_hash_fixup_symbol
1942 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
1943 extern bfd_boolean _bfd_elf_link_hash_table_init
1944 (struct elf_link_hash_table
*, bfd
*,
1945 struct bfd_hash_entry
*(*)
1946 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *),
1947 unsigned int, enum elf_target_id
);
1948 extern bfd_boolean _bfd_elf_slurp_version_tables
1949 (bfd
*, bfd_boolean
);
1950 extern bfd_boolean _bfd_elf_merge_sections
1951 (bfd
*, struct bfd_link_info
*);
1952 extern bfd_boolean _bfd_elf_match_sections_by_type
1953 (bfd
*, const asection
*, bfd
*, const asection
*);
1954 extern bfd_boolean bfd_elf_is_group_section
1955 (bfd
*, const struct bfd_section
*);
1956 extern bfd_boolean _bfd_elf_section_already_linked
1957 (bfd
*, asection
*, struct bfd_link_info
*);
1958 extern void bfd_elf_set_group_contents
1959 (bfd
*, asection
*, void *);
1960 extern unsigned int _bfd_elf_filter_global_symbols
1961 (bfd
*, struct bfd_link_info
*, asymbol
**, long);
1962 extern asection
*_bfd_elf_check_kept_section
1963 (asection
*, struct bfd_link_info
*);
1964 #define _bfd_elf_link_just_syms _bfd_generic_link_just_syms
1965 extern void _bfd_elf_copy_link_hash_symbol_type
1966 (bfd
*, struct bfd_link_hash_entry
*, struct bfd_link_hash_entry
*);
1967 extern bfd_boolean _bfd_elf_size_group_sections
1968 (struct bfd_link_info
*);
1969 extern bfd_boolean _bfd_elf_fixup_group_sections
1970 (bfd
*, asection
*);
1971 extern bfd_boolean _bfd_elf_copy_private_header_data
1973 extern bfd_boolean _bfd_elf_copy_private_symbol_data
1974 (bfd
*, asymbol
*, bfd
*, asymbol
*);
1975 #define _bfd_generic_init_private_section_data \
1976 _bfd_elf_init_private_section_data
1977 extern bfd_boolean _bfd_elf_init_private_section_data
1978 (bfd
*, asection
*, bfd
*, asection
*, struct bfd_link_info
*);
1979 extern bfd_boolean _bfd_elf_copy_private_section_data
1980 (bfd
*, asection
*, bfd
*, asection
*);
1981 extern bfd_boolean _bfd_elf_write_object_contents
1983 extern bfd_boolean _bfd_elf_write_corefile_contents
1985 extern bfd_boolean _bfd_elf_set_section_contents
1986 (bfd
*, sec_ptr
, const void *, file_ptr
, bfd_size_type
);
1987 extern long _bfd_elf_get_symtab_upper_bound
1989 extern long _bfd_elf_canonicalize_symtab
1990 (bfd
*, asymbol
**);
1991 extern long _bfd_elf_get_dynamic_symtab_upper_bound
1993 extern long _bfd_elf_canonicalize_dynamic_symtab
1994 (bfd
*, asymbol
**);
1995 extern long _bfd_elf_get_synthetic_symtab
1996 (bfd
*, long, asymbol
**, long, asymbol
**, asymbol
**);
1997 extern long _bfd_elf_get_reloc_upper_bound
1999 extern long _bfd_elf_canonicalize_reloc
2000 (bfd
*, sec_ptr
, arelent
**, asymbol
**);
2001 extern asection
* _bfd_elf_get_dynamic_reloc_section
2002 (bfd
*, asection
*, bfd_boolean
);
2003 extern asection
* _bfd_elf_make_dynamic_reloc_section
2004 (asection
*, bfd
*, unsigned int, bfd
*, bfd_boolean
);
2005 extern long _bfd_elf_get_dynamic_reloc_upper_bound
2007 extern long _bfd_elf_canonicalize_dynamic_reloc
2008 (bfd
*, arelent
**, asymbol
**);
2009 extern asymbol
*_bfd_elf_make_empty_symbol
2011 extern void _bfd_elf_get_symbol_info
2012 (bfd
*, asymbol
*, symbol_info
*);
2013 extern bfd_boolean _bfd_elf_is_local_label_name
2014 (bfd
*, const char *);
2015 extern alent
*_bfd_elf_get_lineno
2017 extern bfd_boolean _bfd_elf_set_arch_mach
2018 (bfd
*, enum bfd_architecture
, unsigned long);
2019 extern bfd_boolean _bfd_elf_find_nearest_line
2020 (bfd
*, asymbol
**, asection
*, bfd_vma
,
2021 const char **, const char **, unsigned int *, unsigned int *);
2022 extern bfd_boolean _bfd_elf_find_line
2023 (bfd
*, asymbol
**, asymbol
*, const char **, unsigned int *);
2024 extern bfd_boolean _bfd_elf_find_inliner_info
2025 (bfd
*, const char **, const char **, unsigned int *);
2026 extern asymbol
*_bfd_elf_find_function
2027 (bfd
*, asymbol
**, asection
*, bfd_vma
, const char **, const char **);
2028 #define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols
2029 #define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
2030 extern int _bfd_elf_sizeof_headers
2031 (bfd
*, struct bfd_link_info
*);
2032 extern bfd_boolean _bfd_elf_new_section_hook
2033 (bfd
*, asection
*);
2034 extern const struct bfd_elf_special_section
*_bfd_elf_get_special_section
2035 (const char *, const struct bfd_elf_special_section
*, unsigned int);
2036 extern const struct bfd_elf_special_section
*_bfd_elf_get_sec_type_attr
2037 (bfd
*, asection
*);
2039 /* If the target doesn't have reloc handling written yet: */
2040 extern void _bfd_elf_no_info_to_howto
2041 (bfd
*, arelent
*, Elf_Internal_Rela
*);
2043 extern bfd_boolean bfd_section_from_shdr
2044 (bfd
*, unsigned int shindex
);
2045 extern bfd_boolean bfd_section_from_phdr
2046 (bfd
*, Elf_Internal_Phdr
*, int);
2048 extern int _bfd_elf_symbol_from_bfd_symbol
2049 (bfd
*, asymbol
**);
2051 extern Elf_Internal_Sym
*bfd_sym_from_r_symndx
2052 (struct sym_cache
*, bfd
*, unsigned long);
2053 extern asection
*bfd_section_from_elf_index
2054 (bfd
*, unsigned int);
2056 extern struct elf_strtab_hash
* _bfd_elf_strtab_init
2058 extern void _bfd_elf_strtab_free
2059 (struct elf_strtab_hash
*);
2060 extern size_t _bfd_elf_strtab_add
2061 (struct elf_strtab_hash
*, const char *, bfd_boolean
);
2062 extern void _bfd_elf_strtab_addref
2063 (struct elf_strtab_hash
*, size_t);
2064 extern void _bfd_elf_strtab_delref
2065 (struct elf_strtab_hash
*, size_t);
2066 extern unsigned int _bfd_elf_strtab_refcount
2067 (struct elf_strtab_hash
*, size_t);
2068 extern void _bfd_elf_strtab_clear_all_refs
2069 (struct elf_strtab_hash
*);
2070 extern void *_bfd_elf_strtab_save
2071 (struct elf_strtab_hash
*);
2072 extern void _bfd_elf_strtab_restore
2073 (struct elf_strtab_hash
*, void *);
2074 extern bfd_size_type _bfd_elf_strtab_size
2075 (struct elf_strtab_hash
*);
2076 extern bfd_size_type _bfd_elf_strtab_offset
2077 (struct elf_strtab_hash
*, size_t);
2078 extern bfd_boolean _bfd_elf_strtab_emit
2079 (bfd
*, struct elf_strtab_hash
*);
2080 extern void _bfd_elf_strtab_finalize
2081 (struct elf_strtab_hash
*);
2083 extern bfd_boolean bfd_elf_parse_eh_frame_entries
2084 (bfd
*, struct bfd_link_info
*);
2085 extern bfd_boolean _bfd_elf_parse_eh_frame_entry
2086 (struct bfd_link_info
*, asection
*, struct elf_reloc_cookie
*);
2087 extern void _bfd_elf_parse_eh_frame
2088 (bfd
*, struct bfd_link_info
*, asection
*, struct elf_reloc_cookie
*);
2089 extern bfd_boolean _bfd_elf_end_eh_frame_parsing
2090 (struct bfd_link_info
*info
);
2092 extern bfd_boolean _bfd_elf_discard_section_eh_frame
2093 (bfd
*, struct bfd_link_info
*, asection
*,
2094 bfd_boolean (*) (bfd_vma
, void *), struct elf_reloc_cookie
*);
2095 extern bfd_boolean _bfd_elf_discard_section_eh_frame_hdr
2096 (bfd
*, struct bfd_link_info
*);
2097 extern bfd_vma _bfd_elf_eh_frame_section_offset
2098 (bfd
*, struct bfd_link_info
*, asection
*, bfd_vma
);
2099 extern bfd_boolean _bfd_elf_write_section_eh_frame
2100 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
2101 bfd_boolean _bfd_elf_write_section_eh_frame_entry
2102 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
2103 extern bfd_boolean
_bfd_elf_fixup_eh_frame_hdr (struct bfd_link_info
*);
2104 extern bfd_boolean _bfd_elf_write_section_eh_frame_hdr
2105 (bfd
*, struct bfd_link_info
*);
2106 extern bfd_boolean _bfd_elf_eh_frame_present
2107 (struct bfd_link_info
*);
2108 extern bfd_boolean _bfd_elf_eh_frame_entry_present
2109 (struct bfd_link_info
*);
2110 extern bfd_boolean _bfd_elf_maybe_strip_eh_frame_hdr
2111 (struct bfd_link_info
*);
2113 extern bfd_boolean
_bfd_elf_hash_symbol (struct elf_link_hash_entry
*);
2115 extern long _bfd_elf_link_lookup_local_dynindx
2116 (struct bfd_link_info
*, bfd
*, long);
2117 extern bfd_boolean _bfd_elf_compute_section_file_positions
2118 (bfd
*, struct bfd_link_info
*);
2119 extern file_ptr _bfd_elf_assign_file_position_for_section
2120 (Elf_Internal_Shdr
*, file_ptr
, bfd_boolean
);
2122 extern bfd_boolean _bfd_elf_validate_reloc
2125 extern bfd_boolean _bfd_elf_link_create_dynamic_sections
2126 (bfd
*, struct bfd_link_info
*);
2127 extern bfd_boolean _bfd_elf_link_omit_section_dynsym
2128 (bfd
*, struct bfd_link_info
*, asection
*);
2129 extern bfd_boolean _bfd_elf_create_dynamic_sections
2130 (bfd
*, struct bfd_link_info
*);
2131 extern bfd_boolean _bfd_elf_create_got_section
2132 (bfd
*, struct bfd_link_info
*);
2133 extern asection
*_bfd_elf_section_for_symbol
2134 (struct elf_reloc_cookie
*, unsigned long, bfd_boolean
);
2135 extern struct elf_link_hash_entry
*_bfd_elf_define_linkage_sym
2136 (bfd
*, struct bfd_link_info
*, asection
*, const char *);
2137 extern void _bfd_elf_init_1_index_section
2138 (bfd
*, struct bfd_link_info
*);
2139 extern void _bfd_elf_init_2_index_sections
2140 (bfd
*, struct bfd_link_info
*);
2142 extern bfd_boolean _bfd_elfcore_make_pseudosection
2143 (bfd
*, char *, size_t, ufile_ptr
);
2144 extern char *_bfd_elfcore_strndup
2145 (bfd
*, char *, size_t);
2147 extern Elf_Internal_Rela
*_bfd_elf_link_read_relocs
2148 (bfd
*, asection
*, void *, Elf_Internal_Rela
*, bfd_boolean
);
2150 extern bfd_boolean _bfd_elf_link_output_relocs
2151 (bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*,
2152 struct elf_link_hash_entry
**);
2154 extern bfd_boolean _bfd_elf_adjust_dynamic_copy
2155 (struct bfd_link_info
*, struct elf_link_hash_entry
*, asection
*);
2157 extern bfd_boolean _bfd_elf_dynamic_symbol_p
2158 (struct elf_link_hash_entry
*, struct bfd_link_info
*, bfd_boolean
);
2160 extern bfd_boolean _bfd_elf_symbol_refs_local_p
2161 (struct elf_link_hash_entry
*, struct bfd_link_info
*, bfd_boolean
);
2163 extern bfd_reloc_status_type bfd_elf_perform_complex_relocation
2164 (bfd
*, asection
*, bfd_byte
*, Elf_Internal_Rela
*, bfd_vma
);
2166 extern bfd_boolean _bfd_elf_setup_sections
2169 extern void _bfd_elf_post_process_headers (bfd
* , struct bfd_link_info
*);
2171 extern const bfd_target
*bfd_elf32_object_p
2173 extern const bfd_target
*bfd_elf32_core_file_p
2175 extern char *bfd_elf32_core_file_failing_command
2177 extern int bfd_elf32_core_file_failing_signal
2179 extern bfd_boolean bfd_elf32_core_file_matches_executable_p
2181 extern int bfd_elf32_core_file_pid
2184 extern bfd_boolean bfd_elf32_swap_symbol_in
2185 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
2186 extern void bfd_elf32_swap_symbol_out
2187 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
2188 extern void bfd_elf32_swap_reloc_in
2189 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2190 extern void bfd_elf32_swap_reloc_out
2191 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2192 extern void bfd_elf32_swap_reloca_in
2193 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2194 extern void bfd_elf32_swap_reloca_out
2195 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2196 extern void bfd_elf32_swap_phdr_in
2197 (bfd
*, const Elf32_External_Phdr
*, Elf_Internal_Phdr
*);
2198 extern void bfd_elf32_swap_phdr_out
2199 (bfd
*, const Elf_Internal_Phdr
*, Elf32_External_Phdr
*);
2200 extern void bfd_elf32_swap_dyn_in
2201 (bfd
*, const void *, Elf_Internal_Dyn
*);
2202 extern void bfd_elf32_swap_dyn_out
2203 (bfd
*, const Elf_Internal_Dyn
*, void *);
2204 extern long bfd_elf32_slurp_symbol_table
2205 (bfd
*, asymbol
**, bfd_boolean
);
2206 extern bfd_boolean bfd_elf32_write_shdrs_and_ehdr
2208 extern int bfd_elf32_write_out_phdrs
2209 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
2210 extern bfd_boolean bfd_elf32_checksum_contents
2211 (bfd
* , void (*) (const void *, size_t, void *), void *);
2212 extern void bfd_elf32_write_relocs
2213 (bfd
*, asection
*, void *);
2214 extern bfd_boolean bfd_elf32_slurp_reloc_table
2215 (bfd
*, asection
*, asymbol
**, bfd_boolean
);
2217 extern const bfd_target
*bfd_elf64_object_p
2219 extern const bfd_target
*bfd_elf64_core_file_p
2221 extern char *bfd_elf64_core_file_failing_command
2223 extern int bfd_elf64_core_file_failing_signal
2225 extern bfd_boolean bfd_elf64_core_file_matches_executable_p
2227 extern int bfd_elf64_core_file_pid
2230 extern bfd_boolean bfd_elf64_swap_symbol_in
2231 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
2232 extern void bfd_elf64_swap_symbol_out
2233 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
2234 extern void bfd_elf64_swap_reloc_in
2235 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2236 extern void bfd_elf64_swap_reloc_out
2237 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2238 extern void bfd_elf64_swap_reloca_in
2239 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2240 extern void bfd_elf64_swap_reloca_out
2241 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2242 extern void bfd_elf64_swap_phdr_in
2243 (bfd
*, const Elf64_External_Phdr
*, Elf_Internal_Phdr
*);
2244 extern void bfd_elf64_swap_phdr_out
2245 (bfd
*, const Elf_Internal_Phdr
*, Elf64_External_Phdr
*);
2246 extern void bfd_elf64_swap_dyn_in
2247 (bfd
*, const void *, Elf_Internal_Dyn
*);
2248 extern void bfd_elf64_swap_dyn_out
2249 (bfd
*, const Elf_Internal_Dyn
*, void *);
2250 extern long bfd_elf64_slurp_symbol_table
2251 (bfd
*, asymbol
**, bfd_boolean
);
2252 extern bfd_boolean bfd_elf64_write_shdrs_and_ehdr
2254 extern int bfd_elf64_write_out_phdrs
2255 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
2256 extern bfd_boolean bfd_elf64_checksum_contents
2257 (bfd
* , void (*) (const void *, size_t, void *), void *);
2258 extern void bfd_elf64_write_relocs
2259 (bfd
*, asection
*, void *);
2260 extern bfd_boolean bfd_elf64_slurp_reloc_table
2261 (bfd
*, asection
*, asymbol
**, bfd_boolean
);
2263 extern bfd_boolean _bfd_elf_default_relocs_compatible
2264 (const bfd_target
*, const bfd_target
*);
2266 extern bfd_boolean _bfd_elf_relocs_compatible
2267 (const bfd_target
*, const bfd_target
*);
2268 extern bfd_boolean _bfd_elf_notice_as_needed
2269 (bfd
*, struct bfd_link_info
*, enum notice_asneeded_action
);
2271 extern struct elf_link_hash_entry
*_bfd_elf_archive_symbol_lookup
2272 (bfd
*, struct bfd_link_info
*, const char *);
2273 extern bfd_boolean bfd_elf_link_add_symbols
2274 (bfd
*, struct bfd_link_info
*);
2275 extern bfd_boolean _bfd_elf_add_dynamic_entry
2276 (struct bfd_link_info
*, bfd_vma
, bfd_vma
);
2277 extern bfd_boolean _bfd_elf_link_check_relocs
2278 (bfd
*, struct bfd_link_info
*);
2280 extern bfd_boolean bfd_elf_link_record_dynamic_symbol
2281 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
2283 extern int bfd_elf_link_record_local_dynamic_symbol
2284 (struct bfd_link_info
*, bfd
*, long);
2286 extern bfd_boolean _bfd_elf_close_and_cleanup
2289 extern bfd_boolean _bfd_elf_common_definition
2290 (Elf_Internal_Sym
*);
2292 extern unsigned int _bfd_elf_common_section_index
2295 extern asection
*_bfd_elf_common_section
2298 extern bfd_vma _bfd_elf_default_got_elt_size
2299 (bfd
*, struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd
*,
2302 extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn
2303 (bfd
*, arelent
*, struct bfd_symbol
*, void *,
2304 asection
*, bfd
*, char **);
2306 extern bfd_boolean bfd_elf_final_link
2307 (bfd
*, struct bfd_link_info
*);
2309 extern void _bfd_elf_gc_keep
2310 (struct bfd_link_info
*info
);
2312 extern bfd_boolean bfd_elf_gc_mark_dynamic_ref_symbol
2313 (struct elf_link_hash_entry
*h
, void *inf
);
2315 extern bfd_boolean bfd_elf_gc_sections
2316 (bfd
*, struct bfd_link_info
*);
2318 extern bfd_boolean bfd_elf_gc_record_vtinherit
2319 (bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
);
2321 extern bfd_boolean bfd_elf_gc_record_vtentry
2322 (bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
);
2324 extern asection
*_bfd_elf_gc_mark_hook
2325 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
2326 struct elf_link_hash_entry
*, Elf_Internal_Sym
*);
2328 extern asection
*_bfd_elf_gc_mark_rsec
2329 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
,
2330 struct elf_reloc_cookie
*, bfd_boolean
*);
2332 extern bfd_boolean _bfd_elf_gc_mark_reloc
2333 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
,
2334 struct elf_reloc_cookie
*);
2336 extern bfd_boolean _bfd_elf_gc_mark_fdes
2337 (struct bfd_link_info
*, asection
*, asection
*, elf_gc_mark_hook_fn
,
2338 struct elf_reloc_cookie
*);
2340 extern bfd_boolean _bfd_elf_gc_mark
2341 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
);
2343 extern bfd_boolean _bfd_elf_gc_mark_extra_sections
2344 (struct bfd_link_info
*, elf_gc_mark_hook_fn
);
2346 extern bfd_boolean bfd_elf_gc_common_finalize_got_offsets
2347 (bfd
*, struct bfd_link_info
*);
2349 extern bfd_boolean bfd_elf_gc_common_final_link
2350 (bfd
*, struct bfd_link_info
*);
2352 extern asection
*_bfd_elf_is_start_stop
2353 (const struct bfd_link_info
*, struct elf_link_hash_entry
*);
2355 extern bfd_boolean bfd_elf_reloc_symbol_deleted_p
2358 extern struct elf_segment_map
* _bfd_elf_make_dynamic_segment
2359 (bfd
*, asection
*);
2361 extern bfd_boolean _bfd_elf_map_sections_to_segments
2362 (bfd
*, struct bfd_link_info
*);
2364 extern bfd_boolean
_bfd_elf_is_function_type (unsigned int);
2366 extern bfd_size_type
_bfd_elf_maybe_function_sym (const asymbol
*, asection
*,
2369 extern asection
*_bfd_elf_get_reloc_section (asection
*);
2371 extern int bfd_elf_get_default_section_type (flagword
);
2373 extern bfd_boolean bfd_elf_lookup_section_flags
2374 (struct bfd_link_info
*, struct flag_info
*, asection
*);
2376 extern Elf_Internal_Phdr
* _bfd_elf_find_segment_containing_section
2377 (bfd
* abfd
, asection
* section
);
2379 /* PowerPC @tls opcode transform/validate. */
2380 extern unsigned int _bfd_elf_ppc_at_tls_transform
2381 (unsigned int, unsigned int);
2382 /* PowerPC @tprel opcode transform/validate. */
2383 extern unsigned int _bfd_elf_ppc_at_tprel_transform
2384 (unsigned int, unsigned int);
2385 /* PowerPC elf_object_p tweak. */
2386 extern bfd_boolean
_bfd_elf_ppc_set_arch (bfd
*);
2388 /* Exported interface for writing elf corefile notes. */
2389 extern char *elfcore_write_note
2390 (bfd
*, char *, int *, const char *, int, const void *, int);
2391 extern char *elfcore_write_prpsinfo
2392 (bfd
*, char *, int *, const char *, const char *);
2393 extern char *elfcore_write_prstatus
2394 (bfd
*, char *, int *, long, int, const void *);
2395 extern char * elfcore_write_pstatus
2396 (bfd
*, char *, int *, long, int, const void *);
2397 extern char *elfcore_write_prfpreg
2398 (bfd
*, char *, int *, const void *, int);
2399 extern char *elfcore_write_prxfpreg
2400 (bfd
*, char *, int *, const void *, int);
2401 extern char *elfcore_write_xstatereg
2402 (bfd
*, char *, int *, const void *, int);
2403 extern char *elfcore_write_ppc_vmx
2404 (bfd
*, char *, int *, const void *, int);
2405 extern char *elfcore_write_ppc_vsx
2406 (bfd
*, char *, int *, const void *, int);
2407 extern char *elfcore_write_s390_timer
2408 (bfd
*, char *, int *, const void *, int);
2409 extern char *elfcore_write_s390_todcmp
2410 (bfd
*, char *, int *, const void *, int);
2411 extern char *elfcore_write_s390_todpreg
2412 (bfd
*, char *, int *, const void *, int);
2413 extern char *elfcore_write_s390_ctrs
2414 (bfd
*, char *, int *, const void *, int);
2415 extern char *elfcore_write_s390_prefix
2416 (bfd
*, char *, int *, const void *, int);
2417 extern char *elfcore_write_s390_last_break
2418 (bfd
*, char *, int *, const void *, int);
2419 extern char *elfcore_write_s390_system_call
2420 (bfd
*, char *, int *, const void *, int);
2421 extern char *elfcore_write_s390_tdb
2422 (bfd
*, char *, int *, const void *, int);
2423 extern char *elfcore_write_s390_vxrs_low
2424 (bfd
*, char *, int *, const void *, int);
2425 extern char *elfcore_write_s390_vxrs_high
2426 (bfd
*, char *, int *, const void *, int);
2427 extern char *elfcore_write_arm_vfp
2428 (bfd
*, char *, int *, const void *, int);
2429 extern char *elfcore_write_aarch_tls
2430 (bfd
*, char *, int *, const void *, int);
2431 extern char *elfcore_write_aarch_hw_break
2432 (bfd
*, char *, int *, const void *, int);
2433 extern char *elfcore_write_aarch_hw_watch
2434 (bfd
*, char *, int *, const void *, int);
2435 extern char *elfcore_write_lwpstatus
2436 (bfd
*, char *, int *, long, int, const void *);
2437 extern char *elfcore_write_register_note
2438 (bfd
*, char *, int *, const char *, const void *, int);
2440 /* Internal structure which holds information to be included in the
2441 PRPSINFO section of Linux core files.
2443 This is an "internal" structure in the sense that it should be used
2444 to pass information to BFD (via the `elfcore_write_linux_prpsinfo'
2445 function), so things like endianess shouldn't be an issue. This
2446 structure will eventually be converted in one of the
2447 `elf_external_linux_*' structures and written out to an output bfd
2448 by one of the functions declared below. */
2450 struct elf_internal_linux_prpsinfo
2452 char pr_state
; /* Numeric process state. */
2453 char pr_sname
; /* Char for pr_state. */
2454 char pr_zomb
; /* Zombie. */
2455 char pr_nice
; /* Nice val. */
2456 unsigned long pr_flag
; /* Flags. */
2457 unsigned int pr_uid
;
2458 unsigned int pr_gid
;
2459 int pr_pid
, pr_ppid
, pr_pgrp
, pr_sid
;
2460 char pr_fname
[16 + 1]; /* Filename of executable. */
2461 char pr_psargs
[80 + 1]; /* Initial part of arg list. */
2464 /* Linux/most 32-bit archs. */
2465 extern char *elfcore_write_linux_prpsinfo32
2466 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
2468 /* Linux/most 64-bit archs. */
2469 extern char *elfcore_write_linux_prpsinfo64
2470 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
2472 /* Linux/PPC32 uses different layout compared to most archs. */
2473 extern char *elfcore_write_ppc_linux_prpsinfo32
2474 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
2476 extern bfd
*_bfd_elf32_bfd_from_remote_memory
2477 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
2478 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, bfd_size_type
));
2479 extern bfd
*_bfd_elf64_bfd_from_remote_memory
2480 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
2481 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, bfd_size_type
));
2483 extern bfd_vma
bfd_elf_obj_attr_size (bfd
*);
2484 extern void bfd_elf_set_obj_attr_contents (bfd
*, bfd_byte
*, bfd_vma
);
2485 extern int bfd_elf_get_obj_attr_int (bfd
*, int, unsigned int);
2486 extern void bfd_elf_add_obj_attr_int (bfd
*, int, unsigned int, unsigned int);
2487 #define bfd_elf_add_proc_attr_int(BFD, TAG, VALUE) \
2488 bfd_elf_add_obj_attr_int ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2489 extern void bfd_elf_add_obj_attr_string (bfd
*, int, unsigned int, const char *);
2490 #define bfd_elf_add_proc_attr_string(BFD, TAG, VALUE) \
2491 bfd_elf_add_obj_attr_string ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2492 extern void bfd_elf_add_obj_attr_int_string (bfd
*, int, unsigned int,
2493 unsigned int, const char *);
2494 #define bfd_elf_add_proc_attr_int_string(BFD, TAG, INTVAL, STRVAL) \
2495 bfd_elf_add_obj_attr_int_string ((BFD), OBJ_ATTR_PROC, (TAG), \
2498 extern char *_bfd_elf_attr_strdup (bfd
*, const char *);
2499 extern void _bfd_elf_copy_obj_attributes (bfd
*, bfd
*);
2500 extern int _bfd_elf_obj_attrs_arg_type (bfd
*, int, unsigned int);
2501 extern void _bfd_elf_parse_attributes (bfd
*, Elf_Internal_Shdr
*);
2502 extern bfd_boolean
_bfd_elf_merge_object_attributes (bfd
*, bfd
*);
2503 extern bfd_boolean
_bfd_elf_merge_unknown_attribute_low (bfd
*, bfd
*, int);
2504 extern bfd_boolean
_bfd_elf_merge_unknown_attribute_list (bfd
*, bfd
*);
2505 extern Elf_Internal_Shdr
*_bfd_elf_single_rel_hdr (asection
*sec
);
2507 /* The linker may need to keep track of the number of relocs that it
2508 decides to copy as dynamic relocs in check_relocs for each symbol.
2509 This is so that it can later discard them if they are found to be
2510 unnecessary. We can store the information in a field extending the
2511 regular ELF linker hash table. */
2513 struct elf_dyn_relocs
2515 struct elf_dyn_relocs
*next
;
2517 /* The input section of the reloc. */
2520 /* Total number of relocs copied for the input section. */
2521 bfd_size_type count
;
2523 /* Number of pc-relative relocs copied for the input section. */
2524 bfd_size_type pc_count
;
2527 extern bfd_boolean _bfd_elf_create_ifunc_sections
2528 (bfd
*, struct bfd_link_info
*);
2529 extern bfd_boolean _bfd_elf_allocate_ifunc_dyn_relocs
2530 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
2531 struct elf_dyn_relocs
**, bfd_boolean
*, unsigned int,
2532 unsigned int, unsigned int, bfd_boolean
);
2533 extern long _bfd_elf_ifunc_get_synthetic_symtab
2534 (bfd
*, long, asymbol
**, long, asymbol
**, asymbol
**, asection
*,
2535 bfd_vma
*(*) (bfd
*, asymbol
**, asection
*, asection
*));
2537 extern void elf_append_rela (bfd
*, asection
*, Elf_Internal_Rela
*);
2538 extern void elf_append_rel (bfd
*, asection
*, Elf_Internal_Rela
*);
2540 extern bfd_vma
elf64_r_info (bfd_vma
, bfd_vma
);
2541 extern bfd_vma
elf64_r_sym (bfd_vma
);
2542 extern bfd_vma
elf32_r_info (bfd_vma
, bfd_vma
);
2543 extern bfd_vma
elf32_r_sym (bfd_vma
);
2545 /* Large common section. */
2546 extern asection _bfd_elf_large_com_section
;
2548 /* Hash for local symbol with the first section id, ID, in the input
2549 file and the local symbol index, SYM. */
2550 #define ELF_LOCAL_SYMBOL_HASH(ID, SYM) \
2551 (((((ID) & 0xff) << 24) | (((ID) & 0xff00) << 8)) \
2552 ^ (SYM) ^ ((ID) >> 16))
2554 /* This is the condition under which finish_dynamic_symbol will be called.
2555 If our finish_dynamic_symbol isn't called, we'll need to do something
2556 about initializing any .plt and .got entries in relocate_section. */
2557 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
2559 && ((SHARED) || !(H)->forced_local) \
2560 && ((H)->dynindx != -1 || (H)->forced_local))
2562 /* This macro is to avoid lots of duplicated code in the body
2563 of xxx_relocate_section() in the various elfxx-xxxx.c files. */
2564 #define RELOC_FOR_GLOBAL_SYMBOL(info, input_bfd, input_section, rel, \
2565 r_symndx, symtab_hdr, sym_hashes, \
2566 h, sec, relocation, \
2567 unresolved_reloc, warned, ignored) \
2570 /* It seems this can happen with erroneous or unsupported \
2571 input (mixing a.out and elf in an archive, for example.) */ \
2572 if (sym_hashes == NULL) \
2575 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; \
2577 if (info->wrap_hash != NULL \
2578 && (input_section->flags & SEC_DEBUGGING) != 0) \
2579 h = ((struct elf_link_hash_entry *) \
2580 unwrap_hash_lookup (info, input_bfd, &h->root)); \
2582 while (h->root.type == bfd_link_hash_indirect \
2583 || h->root.type == bfd_link_hash_warning) \
2584 h = (struct elf_link_hash_entry *) h->root.u.i.link; \
2588 unresolved_reloc = FALSE; \
2590 if (h->root.type == bfd_link_hash_defined \
2591 || h->root.type == bfd_link_hash_defweak) \
2593 sec = h->root.u.def.section; \
2595 || sec->output_section == NULL) \
2596 /* Set a flag that will be cleared later if we find a \
2597 relocation value for this symbol. output_section \
2598 is typically NULL for symbols satisfied by a shared \
2600 unresolved_reloc = TRUE; \
2602 relocation = (h->root.u.def.value \
2603 + sec->output_section->vma \
2604 + sec->output_offset); \
2606 else if (h->root.type == bfd_link_hash_undefweak) \
2608 else if (info->unresolved_syms_in_objects == RM_IGNORE \
2609 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) \
2611 else if (!bfd_link_relocatable (info)) \
2614 err = (info->unresolved_syms_in_objects == RM_GENERATE_ERROR \
2615 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT); \
2616 (*info->callbacks->undefined_symbol) (info, \
2617 h->root.root.string, \
2620 rel->r_offset, err); \
2623 (void) unresolved_reloc; \
2629 /* This macro is to avoid lots of duplicated code in the body of the
2630 loop over relocations in xxx_relocate_section() in the various
2633 Handle relocations against symbols from removed linkonce sections,
2634 or sections discarded by a linker script. When doing a relocatable
2635 link, we remove such relocations. Otherwise, we just want the
2636 section contents zeroed and avoid any special processing. */
2637 #define RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
2638 rel, count, relend, \
2639 howto, index, contents) \
2642 _bfd_clear_contents (howto, input_bfd, input_section, \
2643 contents + rel[index].r_offset); \
2645 if (bfd_link_relocatable (info) \
2646 && (input_section->flags & SEC_DEBUGGING)) \
2648 /* Only remove relocations in debug sections since other \
2649 sections may require relocations. */ \
2650 Elf_Internal_Shdr *rel_hdr; \
2652 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
2654 /* Avoid empty output section. */ \
2655 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
2657 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
2658 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
2659 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
2661 memmove (rel, rel + count, \
2662 (relend - rel - count) * sizeof (*rel)); \
2664 input_section->reloc_count--; \
2671 for (i_ = 0; i_ < count; i_++) \
2673 rel[i_].r_info = 0; \
2674 rel[i_].r_addend = 0; \
2680 /* Will a symbol be bound to the definition within the shared
2681 library, if any. A unique symbol can never be bound locally. */
2682 #define SYMBOLIC_BIND(INFO, H) \
2683 (!(H)->unique_global \
2684 && ((INFO)->symbolic || ((INFO)->dynamic && !(H)->dynamic)))
2689 #endif /* _LIBELF_H_ */