1 /* BFD back-end data structures for ELF files.
2 Copyright (C) 1992-2018 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;
216 /* Symbol is __start_SECNAME or __stop_SECNAME to mark section
218 unsigned int start_stop
: 1;
219 /* Symbol is or was a weak defined symbol from a dynamic object with
220 a strong defined symbol alias. U.ALIAS points to a list of aliases,
221 the definition having is_weakalias clear. */
222 unsigned int is_weakalias
: 1;
224 /* String table index in .dynstr if this is a dynamic symbol. */
225 unsigned long dynstr_index
;
229 /* Points to a circular list of non-function symbol aliases. */
230 struct elf_link_hash_entry
*alias
;
232 /* Hash value of the name computed using the ELF hash function.
233 Used part way through size_dynamic_sections, after we've finished
235 unsigned long elf_hash_value
;
238 /* Version information. */
241 /* This field is used for a symbol which is not defined in a
242 regular object. It points to the version information read in
243 from the dynamic object. */
244 Elf_Internal_Verdef
*verdef
;
245 /* This field is used for a symbol which is defined in a regular
246 object. It is set up in size_dynamic_sections. It points to
247 the version information we should write out for this symbol. */
248 struct bfd_elf_version_tree
*vertree
;
253 /* For __start_SECNAME and __stop_SECNAME symbols, record the first
254 input section whose section name is SECNAME. */
255 asection
*start_stop_section
;
257 /* Vtable information. */
258 struct elf_link_virtual_table_entry
*vtable
;
262 /* Return the strong definition for a weak symbol with aliases. */
264 static inline struct elf_link_hash_entry
*
265 weakdef (struct elf_link_hash_entry
*h
)
267 while (h
->is_weakalias
)
272 /* Will references to this symbol always reference the symbol
274 #define SYMBOL_REFERENCES_LOCAL(INFO, H) \
275 _bfd_elf_symbol_refs_local_p (H, INFO, 0)
277 /* Will _calls_ to this symbol always call the version in this object? */
278 #define SYMBOL_CALLS_LOCAL(INFO, H) \
279 _bfd_elf_symbol_refs_local_p (H, INFO, 1)
281 /* Whether an undefined weak symbol should resolve to its link-time
282 value, even in PIC or PIE objects. */
283 #define UNDEFWEAK_NO_DYNAMIC_RELOC(INFO, H) \
284 ((H)->root.type == bfd_link_hash_undefweak \
285 && (ELF_ST_VISIBILITY ((H)->other) != STV_DEFAULT \
286 || (INFO)->dynamic_undefined_weak == 0))
288 /* Common symbols that are turned into definitions don't have the
289 DEF_REGULAR flag set, so they might appear to be undefined.
290 Symbols defined in linker scripts also don't have DEF_REGULAR set. */
291 #define ELF_COMMON_DEF_P(H) \
293 && !(H)->def_dynamic \
294 && (H)->root.type == bfd_link_hash_defined)
296 /* Records local symbols to be emitted in the dynamic symbol table. */
298 struct elf_link_local_dynamic_entry
300 struct elf_link_local_dynamic_entry
*next
;
302 /* The input bfd this symbol came from. */
305 /* The index of the local symbol being copied. */
308 /* The index in the outgoing dynamic symbol table. */
311 /* A copy of the input symbol. */
312 Elf_Internal_Sym isym
;
315 struct elf_link_loaded_list
317 struct elf_link_loaded_list
*next
;
321 /* Structures used by the eh_frame optimization code. */
326 /* If REMOVED == 1, this is the CIE that the FDE originally used.
327 The CIE belongs to the same .eh_frame input section as the FDE.
329 If REMOVED == 0, this is the CIE that we have chosen to use for
330 the output FDE. The CIE's REMOVED field is also 0, but the CIE
331 might belong to a different .eh_frame input section from the FDE.
333 May be NULL to signify that the FDE should be discarded. */
334 struct eh_cie_fde
*cie_inf
;
335 struct eh_cie_fde
*next_for_section
;
338 /* CIEs have three states:
340 - REMOVED && !MERGED: Slated for removal because we haven't yet
341 proven that an FDE needs it. FULL_CIE, if nonnull, points to
342 more detailed information about the CIE.
344 - REMOVED && MERGED: We have merged this CIE with MERGED_WITH,
345 which may not belong to the same input section.
347 - !REMOVED: We have decided to keep this CIE. SEC is the
348 .eh_frame input section that contains the CIE. */
350 struct cie
*full_cie
;
351 struct eh_cie_fde
*merged_with
;
355 /* The offset of the personality data from the start of the CIE,
356 or 0 if the CIE doesn't have any. */
357 unsigned int personality_offset
: 8;
359 /* Length of augmentation. aug_str_len is the length of the
360 string including null terminator. aug_data_len is the length
361 of the rest up to the initial insns. */
362 unsigned int aug_str_len
: 3;
363 unsigned int aug_data_len
: 5;
365 /* True if we have marked relocations associated with this CIE. */
366 unsigned int gc_mark
: 1;
368 /* True if we have decided to turn an absolute LSDA encoding into
369 a PC-relative one. */
370 unsigned int make_lsda_relative
: 1;
372 /* True if we have decided to turn an absolute personality
373 encoding into a PC-relative one. */
374 unsigned int make_per_encoding_relative
: 1;
376 /* True if the CIE contains personality data and if that
377 data uses a PC-relative encoding. Always true when
378 make_per_encoding_relative is. */
379 unsigned int per_encoding_relative
: 1;
381 /* True if the CIE contains personality data aligned to a
382 multiple of eight bytes. */
383 unsigned int per_encoding_aligned8
: 1;
385 /* True if we need to add an 'R' (FDE encoding) entry to the
386 CIE's augmentation data. */
387 unsigned int add_fde_encoding
: 1;
389 /* True if we have merged this CIE with another. */
390 unsigned int merged
: 1;
393 unsigned int pad1
: 9;
396 unsigned int reloc_index
;
399 unsigned int new_offset
;
400 unsigned int fde_encoding
: 8;
401 unsigned int lsda_encoding
: 8;
402 unsigned int lsda_offset
: 8;
404 /* True if this entry represents a CIE, false if it represents an FDE. */
405 unsigned int cie
: 1;
407 /* True if this entry is currently marked for removal. */
408 unsigned int removed
: 1;
410 /* True if we need to add a 'z' (augmentation size) entry to the CIE's
411 augmentation data, and an associated byte to each of the CIE's FDEs. */
412 unsigned int add_augmentation_size
: 1;
414 /* True if we have decided to convert absolute FDE relocations into
415 relative ones. This applies to the first relocation in the FDE,
416 which is against the code that the FDE describes. */
417 unsigned int make_relative
: 1;
420 unsigned int pad1
: 4;
422 unsigned int *set_loc
;
425 struct eh_frame_sec_info
429 struct eh_cie_fde entry
[1];
432 struct eh_frame_array_ent
441 #define DWARF2_EH_HDR 1
442 #define COMPACT_EH_HDR 2
444 /* Endian-neutral code indicating that a function cannot be unwound. */
445 #define COMPACT_EH_CANT_UNWIND_OPCODE 0x015d5d01
447 struct dwarf_eh_frame_hdr_info
450 unsigned int fde_count
;
451 /* TRUE if .eh_frame_hdr should contain the sorted search table.
452 We build it if we successfully read all .eh_frame input sections
453 and recognize them. */
455 struct eh_frame_array_ent
*array
;
458 struct compact_eh_frame_hdr_info
460 unsigned int allocated_entries
;
461 /* eh_frame_entry fragments. */
465 struct eh_frame_hdr_info
468 unsigned int array_count
;
469 bfd_boolean frame_hdr_is_compact
;
472 struct dwarf_eh_frame_hdr_info dwarf
;
473 struct compact_eh_frame_hdr_info compact
;
478 /* Enum used to identify target specific extensions to the elf_obj_tdata
479 and elf_link_hash_table structures. Note the enums deliberately start
480 from 1 so that we can detect an uninitialized field. The generic value
481 is last so that additions to this enum do not need to modify more than
485 AARCH64_ELF_DATA
= 1,
524 struct elf_sym_strtab
526 Elf_Internal_Sym sym
;
527 unsigned long dest_index
;
528 unsigned long destshndx_index
;
531 /* ELF linker hash table. */
533 struct elf_link_hash_table
535 struct bfd_link_hash_table root
;
537 /* An identifier used to distinguish different target
538 specific extensions to this structure. */
539 enum elf_target_id hash_table_id
;
541 /* Whether we have created the special dynamic sections required
542 when linking against or generating a shared object. */
543 bfd_boolean dynamic_sections_created
;
545 /* Whether dynamic relocations are present. */
546 bfd_boolean dynamic_relocs
;
548 /* True if this target has relocatable executables, so needs dynamic
550 bfd_boolean is_relocatable_executable
;
552 /* The BFD used to hold special sections created by the linker.
553 This will be the first BFD found which requires these sections to
557 /* The value to use when initialising got.refcount/offset and
558 plt.refcount/offset in an elf_link_hash_entry. Set to zero when
559 the values are refcounts. Set to init_got_offset/init_plt_offset
560 in size_dynamic_sections when the values may be offsets. */
561 union gotplt_union init_got_refcount
;
562 union gotplt_union init_plt_refcount
;
564 /* The value to use for got.refcount/offset and plt.refcount/offset
565 when the values may be offsets. Normally (bfd_vma) -1. */
566 union gotplt_union init_got_offset
;
567 union gotplt_union init_plt_offset
;
569 /* The number of symbols found in the link which is intended for the
570 mandatory DT_SYMTAB tag (.dynsym section) in .dynamic section. */
571 bfd_size_type dynsymcount
;
572 bfd_size_type local_dynsymcount
;
574 /* The string table of dynamic symbols, which becomes the .dynstr
576 struct elf_strtab_hash
*dynstr
;
578 /* The number of symbol strings found in the link which must be put
579 into the .strtab section. */
580 bfd_size_type strtabcount
;
582 /* The array size of the symbol string table, which becomes the
584 bfd_size_type strtabsize
;
586 /* The array of strings, which becomes the .strtab section. */
587 struct elf_sym_strtab
*strtab
;
589 /* The number of buckets in the hash table in the .hash section.
590 This is based on the number of dynamic symbols. */
591 bfd_size_type bucketcount
;
593 /* A linked list of DT_NEEDED names found in dynamic objects
594 included in the link. */
595 struct bfd_link_needed_list
*needed
;
597 /* Sections in the output bfd that provides a section symbol
598 to be used by relocations emitted against local symbols.
599 Most targets will not use data_index_section. */
600 asection
*text_index_section
;
601 asection
*data_index_section
;
603 /* The _GLOBAL_OFFSET_TABLE_ symbol. */
604 struct elf_link_hash_entry
*hgot
;
606 /* The _PROCEDURE_LINKAGE_TABLE_ symbol. */
607 struct elf_link_hash_entry
*hplt
;
609 /* The _DYNAMIC symbol. */
610 struct elf_link_hash_entry
*hdynamic
;
612 /* A pointer to information used to merge SEC_MERGE sections. */
615 /* Used to link stabs in sections. */
616 struct stab_info stab_info
;
618 /* Used by eh_frame code when editing .eh_frame. */
619 struct eh_frame_hdr_info eh_info
;
621 /* A linked list of local symbols to be added to .dynsym. */
622 struct elf_link_local_dynamic_entry
*dynlocal
;
624 /* A linked list of DT_RPATH/DT_RUNPATH names found in dynamic
625 objects included in the link. */
626 struct bfd_link_needed_list
*runpath
;
628 /* Cached first output tls section and size of PT_TLS segment. */
630 bfd_size_type tls_size
;
632 /* A linked list of BFD's loaded in the link. */
633 struct elf_link_loaded_list
*loaded
;
635 /* Short-cuts to get to dynamic linker sections. */
644 asection
*sreldynrelro
;
652 /* Look up an entry in an ELF linker hash table. */
654 #define elf_link_hash_lookup(table, string, create, copy, follow) \
655 ((struct elf_link_hash_entry *) \
656 bfd_link_hash_lookup (&(table)->root, (string), (create), \
659 /* Traverse an ELF linker hash table. */
661 #define elf_link_hash_traverse(table, func, info) \
662 (bfd_link_hash_traverse \
664 (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func), \
667 /* Get the ELF linker hash table from a link_info structure. */
669 #define elf_hash_table(p) ((struct elf_link_hash_table *) ((p)->hash))
671 #define elf_hash_table_id(table) ((table) -> hash_table_id)
673 /* Returns TRUE if the hash table is a struct elf_link_hash_table. */
674 #define is_elf_hash_table(htab) \
675 (((struct bfd_link_hash_table *) (htab))->type == bfd_link_elf_hash_table)
677 /* Used by bfd_sym_from_r_symndx to cache a small number of local
679 #define LOCAL_SYM_CACHE_SIZE 32
683 unsigned long indx
[LOCAL_SYM_CACHE_SIZE
];
684 Elf_Internal_Sym sym
[LOCAL_SYM_CACHE_SIZE
];
687 /* Constant information held for an ELF backend. */
689 struct elf_size_info
{
690 unsigned char sizeof_ehdr
, sizeof_phdr
, sizeof_shdr
;
691 unsigned char sizeof_rel
, sizeof_rela
, sizeof_sym
, sizeof_dyn
, sizeof_note
;
693 /* The size of entries in the .hash section. */
694 unsigned char sizeof_hash_entry
;
696 /* The number of internal relocations to allocate per external
698 unsigned char int_rels_per_ext_rel
;
699 /* We use some fixed size arrays. This should be large enough to
700 handle all back-ends. */
701 #define MAX_INT_RELS_PER_EXT_REL 3
703 unsigned char arch_size
, log_file_align
;
704 unsigned char elfclass
, ev_current
;
705 int (*write_out_phdrs
)
706 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
708 (*write_shdrs_and_ehdr
) (bfd
*);
709 bfd_boolean (*checksum_contents
)
710 (bfd
* , void (*) (const void *, size_t, void *), void *);
712 (bfd
*, asection
*, void *);
713 bfd_boolean (*swap_symbol_in
)
714 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
715 void (*swap_symbol_out
)
716 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
717 bfd_boolean (*slurp_reloc_table
)
718 (bfd
*, asection
*, asymbol
**, bfd_boolean
);
719 long (*slurp_symbol_table
)
720 (bfd
*, asymbol
**, bfd_boolean
);
722 (bfd
*, const void *, Elf_Internal_Dyn
*);
724 (bfd
*, const Elf_Internal_Dyn
*, void *);
726 /* This function is called to swap in a REL relocation. If an
727 external relocation corresponds to more than one internal
728 relocation, then all relocations are swapped in at once. */
729 void (*swap_reloc_in
)
730 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
732 /* This function is called to swap out a REL relocation. */
733 void (*swap_reloc_out
)
734 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
736 /* This function is called to swap in a RELA relocation. If an
737 external relocation corresponds to more than one internal
738 relocation, then all relocations are swapped in at once. */
739 void (*swap_reloca_in
)
740 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
742 /* This function is called to swap out a RELA relocation. */
743 void (*swap_reloca_out
)
744 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
747 #define elf_symbol_from(ABFD,S) \
748 (((S)->the_bfd != NULL \
749 && (S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \
750 && (S)->the_bfd->tdata.elf_obj_data != 0) \
751 ? (elf_symbol_type *) (S) \
754 enum elf_reloc_type_class
{
756 reloc_class_relative
,
762 struct elf_reloc_cookie
764 Elf_Internal_Rela
*rels
, *rel
, *relend
;
765 Elf_Internal_Sym
*locsyms
;
769 struct elf_link_hash_entry
**sym_hashes
;
771 bfd_boolean bad_symtab
;
774 /* The level of IRIX compatibility we're striving for. */
782 /* Mapping of ELF section names and types. */
783 struct bfd_elf_special_section
786 unsigned int prefix_length
;
787 /* 0 means name must match PREFIX exactly.
788 -1 means name must start with PREFIX followed by an arbitrary string.
789 -2 means name must match PREFIX exactly or consist of PREFIX followed
790 by a dot then anything.
791 > 0 means name must start with the first PREFIX_LENGTH chars of
792 PREFIX and finish with the last SUFFIX_LENGTH chars of PREFIX. */
793 signed int suffix_length
;
798 enum action_discarded
804 typedef asection
* (*elf_gc_mark_hook_fn
)
805 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
806 struct elf_link_hash_entry
*, Elf_Internal_Sym
*);
808 enum elf_property_kind
810 /* A new property. */
811 property_unknown
= 0,
812 /* A property ignored by backend. */
814 /* A corrupt property reported by backend. */
816 /* A property should be removed due to property merge. */
818 /* A property which is a number. */
822 typedef struct elf_property
824 unsigned int pr_type
;
825 unsigned int pr_datasz
;
828 /* For property_number, this is a number. */
830 /* Add a new one if elf_property_kind is updated. */
832 enum elf_property_kind pr_kind
;
835 typedef struct elf_property_list
837 struct elf_property_list
*next
;
838 struct elf_property property
;
841 struct bfd_elf_section_reloc_data
;
843 struct elf_backend_data
845 /* The architecture for this backend. */
846 enum bfd_architecture arch
;
848 /* An identifier used to distinguish different target specific
849 extensions to elf_obj_tdata and elf_link_hash_table structures. */
850 enum elf_target_id target_id
;
852 /* The ELF machine code (EM_xxxx) for this backend. */
853 int elf_machine_code
;
858 /* The maximum page size for this backend. */
861 /* The minimum page size for this backend. An input object will not be
862 considered page aligned unless its sections are correctly aligned for
863 pages at least this large. May be smaller than maxpagesize. */
866 /* The common page size for this backend. */
867 bfd_vma commonpagesize
;
869 /* The value of commonpagesize to use when -z relro for this backend. */
870 bfd_vma relropagesize
;
872 /* The BFD flags applied to sections created for dynamic linking. */
873 flagword dynamic_sec_flags
;
875 /* Architecture-specific data for this backend.
876 This is actually a pointer to some type like struct elf_ARCH_data. */
877 const void *arch_data
;
879 /* A function to translate an ELF RELA relocation to a BFD arelent
880 structure. Returns TRUE upon success, FALSE otherwise. */
881 bfd_boolean (*elf_info_to_howto
)
882 (bfd
*, arelent
*, Elf_Internal_Rela
*);
884 /* A function to translate an ELF REL relocation to a BFD arelent
885 structure. Returns TRUE upon success, FALSE otherwise. */
886 bfd_boolean (*elf_info_to_howto_rel
)
887 (bfd
*, arelent
*, Elf_Internal_Rela
*);
889 /* A function to determine whether a symbol is global when
890 partitioning the symbol table into local and global symbols.
891 This should be NULL for most targets, in which case the correct
892 thing will be done. MIPS ELF, at least on the Irix 5, has
893 special requirements. */
894 bfd_boolean (*elf_backend_sym_is_global
)
897 /* The remaining functions are hooks which are called only if they
900 /* A function to permit a backend specific check on whether a
901 particular BFD format is relevant for an object file, and to
902 permit the backend to set any global information it wishes. When
903 this is called elf_elfheader is set, but anything else should be
904 used with caution. If this returns FALSE, the check_format
905 routine will return a bfd_error_wrong_format error. */
906 bfd_boolean (*elf_backend_object_p
)
909 /* A function to do additional symbol processing when reading the
910 ELF symbol table. This is where any processor-specific special
911 section indices are handled. */
912 void (*elf_backend_symbol_processing
)
915 /* A function to do additional symbol processing after reading the
916 entire ELF symbol table. */
917 bfd_boolean (*elf_backend_symbol_table_processing
)
918 (bfd
*, elf_symbol_type
*, unsigned int);
920 /* A function to set the type of the info field. Processor-specific
921 types should be handled here. */
922 int (*elf_backend_get_symbol_type
)
923 (Elf_Internal_Sym
*, int);
925 /* A function to return the linker hash table entry of a symbol that
926 might be satisfied by an archive symbol. */
927 struct elf_link_hash_entry
* (*elf_backend_archive_symbol_lookup
)
928 (bfd
*, struct bfd_link_info
*, const char *);
930 /* Return true if local section symbols should have a non-null st_name.
931 NULL implies false. */
932 bfd_boolean (*elf_backend_name_local_section_symbols
)
935 /* A function to do additional processing on the ELF section header
936 just before writing it out. This is used to set the flags and
937 type fields for some sections, or to actually write out data for
939 bfd_boolean (*elf_backend_section_processing
)
940 (bfd
*, Elf_Internal_Shdr
*);
942 /* A function to handle unusual section types when creating BFD
943 sections from ELF sections. */
944 bfd_boolean (*elf_backend_section_from_shdr
)
945 (bfd
*, Elf_Internal_Shdr
*, const char *, int);
947 /* A function to convert machine dependent ELF section header flags to
948 BFD internal section header flags. */
949 bfd_boolean (*elf_backend_section_flags
)
950 (flagword
*, const Elf_Internal_Shdr
*);
952 /* A function that returns a struct containing ELF section flags and
953 type for the given BFD section. */
954 const struct bfd_elf_special_section
* (*get_sec_type_attr
)
957 /* A function to handle unusual program segment types when creating BFD
958 sections from ELF program segments. */
959 bfd_boolean (*elf_backend_section_from_phdr
)
960 (bfd
*, Elf_Internal_Phdr
*, int, const char *);
962 /* A function to set up the ELF section header for a BFD section in
963 preparation for writing it out. This is where the flags and type
964 fields are set for unusual sections. */
965 bfd_boolean (*elf_backend_fake_sections
)
966 (bfd
*, Elf_Internal_Shdr
*, asection
*);
968 /* A function to get the ELF section index for a BFD section. If
969 this returns TRUE, the section was found. If it is a normal ELF
970 section, *RETVAL should be left unchanged. If it is not a normal
971 ELF section *RETVAL should be set to the SHN_xxxx index. */
972 bfd_boolean (*elf_backend_section_from_bfd_section
)
973 (bfd
*, asection
*, int *retval
);
975 /* If this field is not NULL, it is called by the add_symbols phase
976 of a link just before adding a symbol to the global linker hash
977 table. It may modify any of the fields as it wishes. If *NAME
978 is set to NULL, the symbol will be skipped rather than being
979 added to the hash table. This function is responsible for
980 handling all processor dependent symbol bindings and section
981 indices, and must set at least *FLAGS and *SEC for each processor
982 dependent case; failure to do so will cause a link error. */
983 bfd_boolean (*elf_add_symbol_hook
)
984 (bfd
*abfd
, struct bfd_link_info
*info
, Elf_Internal_Sym
*,
985 const char **name
, flagword
*flags
, asection
**sec
, bfd_vma
*value
);
987 /* If this field is not NULL, it is called by the elf_link_output_sym
988 phase of a link for each symbol which will appear in the object file.
989 On error, this function returns 0. 1 is returned when the symbol
990 should be output, 2 is returned when the symbol should be discarded. */
991 int (*elf_backend_link_output_symbol_hook
)
992 (struct bfd_link_info
*info
, const char *, Elf_Internal_Sym
*,
993 asection
*, struct elf_link_hash_entry
*);
995 /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend
996 linker the first time it encounters a dynamic object in the link.
997 This function must create any sections required for dynamic
998 linking. The ABFD argument is a dynamic object. The .interp,
999 .dynamic, .dynsym, .dynstr, and .hash functions have already been
1000 created, and this function may modify the section flags if
1001 desired. This function will normally create the .got and .plt
1002 sections, but different backends have different requirements. */
1003 bfd_boolean (*elf_backend_create_dynamic_sections
)
1004 (bfd
*abfd
, struct bfd_link_info
*info
);
1006 /* When creating a shared library, determine whether to omit the
1007 dynamic symbol for the section. */
1008 bfd_boolean (*elf_backend_omit_section_dynsym
)
1009 (bfd
*output_bfd
, struct bfd_link_info
*info
, asection
*osec
);
1011 /* Return TRUE if relocations of targets are compatible to the extent
1012 that CHECK_RELOCS will properly process them. PR 4424. */
1013 bfd_boolean (*relocs_compatible
) (const bfd_target
*, const bfd_target
*);
1015 /* The CHECK_RELOCS function is called by the add_symbols phase of
1016 the ELF backend linker. It is called once for each section with
1017 relocs of an object file, just after the symbols for the object
1018 file have been added to the global linker hash table. The
1019 function must look through the relocs and do any special handling
1020 required. This generally means allocating space in the global
1021 offset table, and perhaps allocating space for a reloc. The
1022 relocs are always passed as Rela structures; if the section
1023 actually uses Rel structures, the r_addend field will always be
1025 bfd_boolean (*check_relocs
)
1026 (bfd
*abfd
, struct bfd_link_info
*info
, asection
*o
,
1027 const Elf_Internal_Rela
*relocs
);
1029 /* The CHECK_DIRECTIVES function is called once per input file by
1030 the add_symbols phase of the ELF backend linker. The function
1031 must inspect the bfd and create any additional symbols according
1032 to any custom directives in the bfd. */
1033 bfd_boolean (*check_directives
)
1034 (bfd
*abfd
, struct bfd_link_info
*info
);
1036 /* The NOTICE_AS_NEEDED function is called as the linker is about to
1037 handle an as-needed lib (ACT = notice_as_needed), and after the
1038 linker has decided to keep the lib (ACT = notice_needed) or when
1039 the lib is not needed (ACT = notice_not_needed). */
1040 bfd_boolean (*notice_as_needed
)
1041 (bfd
*abfd
, struct bfd_link_info
*info
, enum notice_asneeded_action act
);
1043 /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
1044 linker for every symbol which is defined by a dynamic object and
1045 referenced by a regular object. This is called after all the
1046 input files have been seen, but before the SIZE_DYNAMIC_SECTIONS
1047 function has been called. The hash table entry should be
1048 bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be
1049 defined in a section from a dynamic object. Dynamic object
1050 sections are not included in the final link, and this function is
1051 responsible for changing the value to something which the rest of
1052 the link can deal with. This will normally involve adding an
1053 entry to the .plt or .got or some such section, and setting the
1054 symbol to point to that. */
1055 bfd_boolean (*elf_backend_adjust_dynamic_symbol
)
1056 (struct bfd_link_info
*info
, struct elf_link_hash_entry
*h
);
1058 /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker
1059 after all the linker input files have been seen but before the
1060 section sizes have been set. This is called after
1061 ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS. */
1062 bfd_boolean (*elf_backend_always_size_sections
)
1063 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1065 /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend
1066 linker after all the linker input files have been seen but before
1067 the sections sizes have been set. This is called after
1068 ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols.
1069 It is only called when linking against a dynamic object. It must
1070 set the sizes of the dynamic sections, and may fill in their
1071 contents as well. The generic ELF linker can handle the .dynsym,
1072 .dynstr and .hash sections. This function must handle the
1073 .interp section and any sections created by the
1074 CREATE_DYNAMIC_SECTIONS entry point. */
1075 bfd_boolean (*elf_backend_size_dynamic_sections
)
1076 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1078 /* Set TEXT_INDEX_SECTION and DATA_INDEX_SECTION, the output sections
1079 we keep to use as a base for relocs and symbols. */
1080 void (*elf_backend_init_index_section
)
1081 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1083 /* The RELOCATE_SECTION function is called by the ELF backend linker
1084 to handle the relocations for a section.
1086 The relocs are always passed as Rela structures; if the section
1087 actually uses Rel structures, the r_addend field will always be
1090 This function is responsible for adjust the section contents as
1091 necessary, and (if using Rela relocs and generating a
1092 relocatable output file) adjusting the reloc addend as
1095 This function does not have to worry about setting the reloc
1096 address or the reloc symbol index.
1098 LOCAL_SYMS is a pointer to the swapped in local symbols.
1100 LOCAL_SECTIONS is an array giving the section in the input file
1101 corresponding to the st_shndx field of each local symbol.
1103 The global hash table entry for the global symbols can be found
1104 via elf_sym_hashes (input_bfd).
1106 When generating relocatable output, this function must handle
1107 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
1108 going to be the section symbol corresponding to the output
1109 section, which means that the addend must be adjusted
1112 Returns FALSE on error, TRUE on success, 2 if successful and
1113 relocations should be written for this section. */
1114 int (*elf_backend_relocate_section
)
1115 (bfd
*output_bfd
, struct bfd_link_info
*info
, bfd
*input_bfd
,
1116 asection
*input_section
, bfd_byte
*contents
, Elf_Internal_Rela
*relocs
,
1117 Elf_Internal_Sym
*local_syms
, asection
**local_sections
);
1119 /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend
1120 linker just before it writes a symbol out to the .dynsym section.
1121 The processor backend may make any required adjustment to the
1122 symbol. It may also take the opportunity to set contents of the
1123 dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on
1124 all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called
1125 on those symbols which are defined by a dynamic object. */
1126 bfd_boolean (*elf_backend_finish_dynamic_symbol
)
1127 (bfd
*output_bfd
, struct bfd_link_info
*info
,
1128 struct elf_link_hash_entry
*h
, Elf_Internal_Sym
*sym
);
1130 /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend
1131 linker just before it writes all the dynamic sections out to the
1132 output file. The FINISH_DYNAMIC_SYMBOL will have been called on
1133 all dynamic symbols. */
1134 bfd_boolean (*elf_backend_finish_dynamic_sections
)
1135 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1137 /* A function to do any beginning processing needed for the ELF file
1138 before building the ELF headers and computing file positions. */
1139 void (*elf_backend_begin_write_processing
)
1140 (bfd
*, struct bfd_link_info
*);
1142 /* A function to do any final processing needed for the ELF file
1143 before writing it out. The LINKER argument is TRUE if this BFD
1144 was created by the ELF backend linker. */
1145 void (*elf_backend_final_write_processing
)
1146 (bfd
*, bfd_boolean linker
);
1148 /* This function is called by get_program_header_size. It should
1149 return the number of additional program segments which this BFD
1150 will need. It should return -1 on error. */
1151 int (*elf_backend_additional_program_headers
)
1152 (bfd
*, struct bfd_link_info
*);
1154 /* This function is called to modify an existing segment map in a
1155 backend specific fashion. */
1156 bfd_boolean (*elf_backend_modify_segment_map
)
1157 (bfd
*, struct bfd_link_info
*);
1159 /* This function is called to modify program headers just before
1160 they are written. */
1161 bfd_boolean (*elf_backend_modify_program_headers
)
1162 (bfd
*, struct bfd_link_info
*);
1164 /* This function is called to see if the PHDR header should be
1165 checked for validity. */
1166 bfd_boolean (*elf_backend_allow_non_load_phdr
)
1167 (bfd
*, const Elf_Internal_Phdr
*, unsigned);
1169 /* This function is called before section garbage collection to
1170 mark entry symbol sections. */
1172 (struct bfd_link_info
*);
1174 /* This function is called during section garbage collection to
1175 mark sections that define global symbols. */
1176 bfd_boolean (*gc_mark_dynamic_ref
)
1177 (struct elf_link_hash_entry
*, void *);
1179 /* This function is called during section gc to discover the section a
1180 particular relocation refers to. */
1181 elf_gc_mark_hook_fn gc_mark_hook
;
1183 /* This function, if defined, is called after the first gc marking pass
1184 to allow the backend to mark additional sections. */
1185 bfd_boolean (*gc_mark_extra_sections
)
1186 (struct bfd_link_info
*, elf_gc_mark_hook_fn
);
1188 /* This function, if defined, is called after the ELF headers have
1189 been created. This allows for things like the OS and ABI versions
1191 void (*elf_backend_post_process_headers
)
1192 (bfd
*, struct bfd_link_info
*);
1194 /* This function, if defined, prints a symbol to file and returns the
1195 name of the symbol to be printed. It should return NULL to fall
1196 back to default symbol printing. */
1197 const char *(*elf_backend_print_symbol_all
)
1198 (bfd
*, void *, asymbol
*);
1200 /* This function, if defined, is called after all local symbols and
1201 global symbols converted to locals are emitted into the symtab
1202 section. It allows the backend to emit special local symbols
1203 not handled in the hash table. */
1204 bfd_boolean (*elf_backend_output_arch_local_syms
)
1205 (bfd
*, struct bfd_link_info
*, void *,
1206 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym
*, asection
*,
1207 struct elf_link_hash_entry
*));
1209 /* This function, if defined, is called after all symbols are emitted
1210 into the symtab section. It allows the backend to emit special
1211 global symbols not handled in the hash table. */
1212 bfd_boolean (*elf_backend_output_arch_syms
)
1213 (bfd
*, struct bfd_link_info
*, void *,
1214 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym
*, asection
*,
1215 struct elf_link_hash_entry
*));
1217 /* Filter what symbols of the output file to include in the import
1218 library if one is created. */
1219 unsigned int (*elf_backend_filter_implib_symbols
)
1220 (bfd
*, struct bfd_link_info
*, asymbol
**, long);
1222 /* Copy any information related to dynamic linking from a pre-existing
1223 symbol to a newly created symbol. Also called to copy flags and
1224 other back-end info to a weakdef, in which case the symbol is not
1225 newly created and plt/got refcounts and dynamic indices should not
1227 void (*elf_backend_copy_indirect_symbol
)
1228 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
1229 struct elf_link_hash_entry
*);
1231 /* Modify any information related to dynamic linking such that the
1232 symbol is not exported. */
1233 void (*elf_backend_hide_symbol
)
1234 (struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd_boolean
);
1236 /* A function to do additional symbol fixup, called by
1237 _bfd_elf_fix_symbol_flags. */
1238 bfd_boolean (*elf_backend_fixup_symbol
)
1239 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
1241 /* Merge the backend specific symbol attribute. */
1242 void (*elf_backend_merge_symbol_attribute
)
1243 (struct elf_link_hash_entry
*, const Elf_Internal_Sym
*, bfd_boolean
,
1246 /* This function, if defined, will return a string containing the
1247 name of a target-specific dynamic tag. */
1248 char *(*elf_backend_get_target_dtag
)
1251 /* Decide whether an undefined symbol is special and can be ignored.
1252 This is the case for OPTIONAL symbols on IRIX. */
1253 bfd_boolean (*elf_backend_ignore_undef_symbol
)
1254 (struct elf_link_hash_entry
*);
1256 /* Emit relocations. Overrides default routine for emitting relocs,
1257 except during a relocatable link, or if all relocs are being emitted. */
1258 bfd_boolean (*elf_backend_emit_relocs
)
1259 (bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*,
1260 struct elf_link_hash_entry
**);
1262 /* Update relocations. It is allowed to change the number and the order.
1263 In such a case hashes should be invalidated. */
1264 void (*elf_backend_update_relocs
)
1265 (asection
*, struct bfd_elf_section_reloc_data
*);
1267 /* Count relocations. Not called for relocatable links
1268 or if all relocs are being preserved in the output. */
1269 unsigned int (*elf_backend_count_relocs
)
1270 (struct bfd_link_info
*, asection
*);
1272 /* Count additionals relocations. Called for relocatable links if
1273 additional relocations needs to be created. */
1274 unsigned int (*elf_backend_count_additional_relocs
)
1277 /* Say whether to sort relocs output by ld -r and ld --emit-relocs,
1278 by r_offset. If NULL, default to true. */
1279 bfd_boolean (*sort_relocs_p
)
1282 /* This function, if defined, is called when an NT_PRSTATUS note is found
1284 bfd_boolean (*elf_backend_grok_prstatus
)
1285 (bfd
*, Elf_Internal_Note
*);
1287 /* This function, if defined, is called when an NT_PSINFO or NT_PRPSINFO
1288 note is found in a core file. */
1289 bfd_boolean (*elf_backend_grok_psinfo
)
1290 (bfd
*, Elf_Internal_Note
*);
1292 /* This function, if defined, is called when a "FreeBSD" NT_PRSTATUS
1293 note is found in a core file. */
1294 bfd_boolean (*elf_backend_grok_freebsd_prstatus
)
1295 (bfd
*, Elf_Internal_Note
*);
1297 /* This function, if defined, is called to write a note to a corefile. */
1298 char *(*elf_backend_write_core_note
)
1299 (bfd
*abfd
, char *buf
, int *bufsiz
, int note_type
, ...);
1301 /* This function, if defined, is called to convert target-specific
1302 section flag names into hex values. */
1303 flagword (*elf_backend_lookup_section_flags_hook
)
1306 /* This function returns class of a reloc type. */
1307 enum elf_reloc_type_class (*elf_backend_reloc_type_class
)
1308 (const struct bfd_link_info
*, const asection
*, const Elf_Internal_Rela
*);
1310 /* This function, if defined, removes information about discarded functions
1311 from other sections which mention them. */
1312 bfd_boolean (*elf_backend_discard_info
)
1313 (bfd
*, struct elf_reloc_cookie
*, struct bfd_link_info
*);
1315 /* This function, if defined, signals that the function above has removed
1316 the discarded relocations for this section. */
1317 bfd_boolean (*elf_backend_ignore_discarded_relocs
)
1320 /* What to do when ld finds relocations against symbols defined in
1321 discarded sections. */
1322 unsigned int (*action_discarded
)
1325 /* This function returns the width of FDE pointers in bytes, or 0 if
1326 that can't be determined for some reason. The default definition
1327 goes by the bfd's EI_CLASS. */
1328 unsigned int (*elf_backend_eh_frame_address_size
)
1329 (bfd
*, const asection
*);
1331 /* These functions tell elf-eh-frame whether to attempt to turn
1332 absolute or lsda encodings into pc-relative ones. The default
1333 definition enables these transformations. */
1334 bfd_boolean (*elf_backend_can_make_relative_eh_frame
)
1335 (bfd
*, struct bfd_link_info
*, asection
*);
1336 bfd_boolean (*elf_backend_can_make_lsda_relative_eh_frame
)
1337 (bfd
*, struct bfd_link_info
*, asection
*);
1339 /* This function returns an encoding after computing the encoded
1340 value (and storing it in ENCODED) for the given OFFSET into OSEC,
1341 to be stored in at LOC_OFFSET into the LOC_SEC input section.
1342 The default definition chooses a 32-bit PC-relative encoding. */
1343 bfd_byte (*elf_backend_encode_eh_address
)
1344 (bfd
*abfd
, struct bfd_link_info
*info
,
1345 asection
*osec
, bfd_vma offset
,
1346 asection
*loc_sec
, bfd_vma loc_offset
,
1349 /* This function, if defined, may write out the given section.
1350 Returns TRUE if it did so and FALSE if the caller should. */
1351 bfd_boolean (*elf_backend_write_section
)
1352 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
1354 /* The level of IRIX compatibility we're striving for.
1355 MIPS ELF specific function. */
1356 irix_compat_t (*elf_backend_mips_irix_compat
)
1359 reloc_howto_type
*(*elf_backend_mips_rtype_to_howto
)
1360 (bfd
*, unsigned int, bfd_boolean
);
1362 /* The swapping table to use when dealing with ECOFF information.
1363 Used for the MIPS ELF .mdebug section. */
1364 const struct ecoff_debug_swap
*elf_backend_ecoff_debug_swap
;
1366 /* This function implements `bfd_elf_bfd_from_remote_memory';
1367 see elf.c, elfcode.h. */
1368 bfd
*(*elf_backend_bfd_from_remote_memory
)
1369 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
1370 int (*target_read_memory
) (bfd_vma vma
, bfd_byte
*myaddr
,
1371 bfd_size_type len
));
1373 /* This function is used by `_bfd_elf_get_synthetic_symtab';
1375 bfd_vma (*plt_sym_val
) (bfd_vma
, const asection
*, const arelent
*);
1377 /* Is symbol defined in common section? */
1378 bfd_boolean (*common_definition
) (Elf_Internal_Sym
*);
1380 /* Return a common section index for section. */
1381 unsigned int (*common_section_index
) (asection
*);
1383 /* Return a common section for section. */
1384 asection
*(*common_section
) (asection
*);
1386 /* Return TRUE if we can merge 2 definitions. */
1387 bfd_boolean (*merge_symbol
) (struct elf_link_hash_entry
*,
1388 const Elf_Internal_Sym
*, asection
**,
1389 bfd_boolean
, bfd_boolean
,
1390 bfd
*, const asection
*);
1392 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
1393 bfd_boolean (*elf_hash_symbol
) (struct elf_link_hash_entry
*);
1395 /* Return TRUE if type is a function symbol type. */
1396 bfd_boolean (*is_function_type
) (unsigned int type
);
1398 /* If the ELF symbol SYM might be a function in SEC, return the
1399 function size and set *CODE_OFF to the function's entry point,
1400 otherwise return zero. */
1401 bfd_size_type (*maybe_function_sym
) (const asymbol
*sym
, asection
*sec
,
1404 /* Given NAME, the name of a relocation section stripped of its
1405 .rel/.rela prefix, return the section in ABFD to which the
1406 relocations apply. */
1407 asection
*(*get_reloc_section
) (bfd
*abfd
, const char *name
);
1409 /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
1410 has a type >= SHT_LOOS. Returns TRUE if the fields were initialised,
1411 FALSE otherwise. Can be called multiple times for a given section,
1412 until it returns TRUE. Most of the times it is called ISECTION will be
1413 set to an input section that might be associated with the output section.
1414 The last time that it is called, ISECTION will be set to NULL. */
1415 bfd_boolean (*elf_backend_copy_special_section_fields
)
1416 (const bfd
*ibfd
, bfd
*obfd
, const Elf_Internal_Shdr
*isection
,
1417 Elf_Internal_Shdr
*osection
);
1419 /* Used to handle bad SHF_LINK_ORDER input. */
1420 void (*link_order_error_handler
) (const char *, ...);
1422 /* Name of the PLT relocation section. */
1423 const char *relplt_name
;
1425 /* Alternate EM_xxxx machine codes for this backend. */
1426 int elf_machine_alt1
;
1427 int elf_machine_alt2
;
1429 const struct elf_size_info
*s
;
1431 /* An array of target specific special sections. */
1432 const struct bfd_elf_special_section
*special_sections
;
1434 /* The size in bytes of the header for the GOT. This includes the
1435 so-called reserved entries on some systems. */
1436 bfd_vma got_header_size
;
1438 /* The size of the GOT entry for the symbol pointed to by H if non-NULL,
1439 otherwise by the local symbol with index SYMNDX in IBFD. */
1440 bfd_vma (*got_elt_size
) (bfd
*, struct bfd_link_info
*,
1441 struct elf_link_hash_entry
*h
,
1442 bfd
*ibfd
, unsigned long symndx
);
1444 /* The vendor name to use for a processor-standard attributes section. */
1445 const char *obj_attrs_vendor
;
1447 /* The section name to use for a processor-standard attributes section. */
1448 const char *obj_attrs_section
;
1450 /* Return 1, 2 or 3 to indicate what type of arguments a
1451 processor-specific tag takes. */
1452 int (*obj_attrs_arg_type
) (int);
1454 /* The section type to use for an attributes section. */
1455 unsigned int obj_attrs_section_type
;
1457 /* This function determines the order in which any attributes are
1458 written. It must be defined for input in the range
1459 LEAST_KNOWN_OBJ_ATTRIBUTE..NUM_KNOWN_OBJ_ATTRIBUTES-1 (this range
1460 is used in order to make unity easy). The returned value is the
1461 actual tag number to place in the input position. */
1462 int (*obj_attrs_order
) (int);
1464 /* Handle merging unknown attributes; either warn and return TRUE,
1465 or give an error and return FALSE. */
1466 bfd_boolean (*obj_attrs_handle_unknown
) (bfd
*, int);
1468 /* Parse GNU properties. Return the property kind. If the property
1469 is corrupt, issue an error message and return property_corrupt. */
1470 enum elf_property_kind (*parse_gnu_properties
) (bfd
*, unsigned int,
1474 /* Merge GNU properties. Return TRUE if property is updated. */
1475 bfd_boolean (*merge_gnu_properties
) (struct bfd_link_info
*, bfd
*,
1476 elf_property
*, elf_property
*);
1478 /* Set up GNU properties. */
1479 bfd
*(*setup_gnu_properties
) (struct bfd_link_info
*);
1481 /* Encoding used for compact EH tables. */
1482 int (*compact_eh_encoding
) (struct bfd_link_info
*);
1484 /* Opcode representing no unwind. */
1485 int (*cant_unwind_opcode
) (struct bfd_link_info
*);
1487 /* This is non-zero if static TLS segments require a special alignment. */
1488 unsigned static_tls_alignment
;
1490 /* Alignment for the PT_GNU_STACK segment. */
1491 unsigned stack_align
;
1493 /* Flag bits to assign to a section of type SHT_STRTAB. */
1494 unsigned long elf_strtab_flags
;
1496 /* This is TRUE if the linker should act like collect and gather
1497 global constructors and destructors by name. This is TRUE for
1498 MIPS ELF because the Irix 5 tools can not handle the .init
1500 unsigned collect
: 1;
1502 /* This is TRUE if the linker should ignore changes to the type of a
1503 symbol. This is TRUE for MIPS ELF because some Irix 5 objects
1504 record undefined functions as STT_OBJECT although the definitions
1506 unsigned type_change_ok
: 1;
1508 /* Whether the backend may use REL relocations. (Some backends use
1509 both REL and RELA relocations, and this flag is set for those
1511 unsigned may_use_rel_p
: 1;
1513 /* Whether the backend may use RELA relocations. (Some backends use
1514 both REL and RELA relocations, and this flag is set for those
1516 unsigned may_use_rela_p
: 1;
1518 /* Whether the default relocation type is RELA. If a backend with
1519 this flag set wants REL relocations for a particular section,
1520 it must note that explicitly. Similarly, if this flag is clear,
1521 and the backend wants RELA relocations for a particular
1523 unsigned default_use_rela_p
: 1;
1525 /* True if PLT and copy relocations should be RELA by default. */
1526 unsigned rela_plts_and_copies_p
: 1;
1528 /* Set if RELA relocations for a relocatable link can be handled by
1529 generic code. Backends that set this flag need do nothing in the
1530 backend relocate_section routine for relocatable linking. */
1531 unsigned rela_normal
: 1;
1533 /* Set if DT_REL/DT_RELA/DT_RELSZ/DT_RELASZ should not include PLT
1535 unsigned dtrel_excludes_plt
: 1;
1537 /* TRUE if addresses "naturally" sign extend. This is used when
1538 swapping in from Elf32 when BFD64. */
1539 unsigned sign_extend_vma
: 1;
1541 unsigned want_got_plt
: 1;
1542 unsigned plt_readonly
: 1;
1543 unsigned want_plt_sym
: 1;
1544 unsigned plt_not_loaded
: 1;
1545 unsigned plt_alignment
: 4;
1546 unsigned can_gc_sections
: 1;
1547 unsigned can_refcount
: 1;
1548 unsigned want_got_sym
: 1;
1549 unsigned want_dynbss
: 1;
1550 unsigned want_dynrelro
: 1;
1552 /* Targets which do not support physical addressing often require
1553 that the p_paddr field in the section header to be set to zero.
1554 This field indicates whether this behavior is required. */
1555 unsigned want_p_paddr_set_to_zero
: 1;
1557 /* Target has broken hardware and/or kernel that requires pages not
1558 to be mapped twice with different permissions. */
1559 unsigned no_page_alias
: 1;
1561 /* True if an object file lacking a .note.GNU-stack section
1562 should be assumed to be requesting exec stack. At least one
1563 other file in the link needs to have a .note.GNU-stack section
1564 for a PT_GNU_STACK segment to be created. */
1565 unsigned default_execstack
: 1;
1567 /* True if elf_section_data(sec)->this_hdr.contents is sec->rawsize
1568 in length rather than sec->size in length, if sec->rawsize is
1569 non-zero and smaller than sec->size. */
1570 unsigned caches_rawsize
: 1;
1572 /* Address of protected data defined in the shared library may be
1573 external, i.e., due to copy relocation. */
1574 unsigned extern_protected_data
: 1;
1576 /* True if `_bfd_elf_link_renumber_dynsyms' must be called even for
1578 unsigned always_renumber_dynsyms
: 1;
1580 /* True if the 32-bit Linux PRPSINFO structure's `pr_uid' and `pr_gid'
1581 members use a 16-bit data type. */
1582 unsigned linux_prpsinfo32_ugid16
: 1;
1584 /* True if the 64-bit Linux PRPSINFO structure's `pr_uid' and `pr_gid'
1585 members use a 16-bit data type. */
1586 unsigned linux_prpsinfo64_ugid16
: 1;
1589 /* Information about reloc sections associated with a bfd_elf_section_data
1591 struct bfd_elf_section_reloc_data
1593 /* The ELF header for the reloc section associated with this
1595 Elf_Internal_Shdr
*hdr
;
1596 /* The number of relocations currently assigned to HDR. */
1598 /* The ELF section number of the reloc section. Only used for an
1601 /* Used by the backend linker to store the symbol hash table entries
1602 associated with relocs against global symbols. */
1603 struct elf_link_hash_entry
**hashes
;
1606 /* Information stored for each BFD section in an ELF file. This
1607 structure is allocated by elf_new_section_hook. */
1609 struct bfd_elf_section_data
1611 /* The ELF header for this section. */
1612 Elf_Internal_Shdr this_hdr
;
1614 /* INPUT_SECTION_FLAGS if specified in the linker script. */
1615 struct flag_info
*section_flag_info
;
1617 /* Information about the REL and RELA reloc sections associated
1618 with this section, if any. */
1619 struct bfd_elf_section_reloc_data rel
, rela
;
1621 /* The ELF section number of this section. */
1624 /* Used by the backend linker when generating a shared library to
1625 record the dynamic symbol index for a section symbol
1626 corresponding to this section. A value of 0 means that there is
1627 no dynamic symbol for this section. */
1630 /* A pointer to the linked-to section for SHF_LINK_ORDER. */
1631 asection
*linked_to
;
1633 /* A pointer to the swapped relocs. If the section uses REL relocs,
1634 rather than RELA, all the r_addend fields will be zero. This
1635 pointer may be NULL. It is used by the backend linker. */
1636 Elf_Internal_Rela
*relocs
;
1638 /* A pointer to a linked list tracking dynamic relocs copied for
1642 /* A pointer to the bfd section used for dynamic relocs. */
1646 /* Group name, if this section is a member of a group. */
1649 /* Group signature sym, if this is the SHT_GROUP section. */
1650 struct bfd_symbol
*id
;
1653 /* For a member of a group, points to the SHT_GROUP section.
1654 NULL for the SHT_GROUP section itself and non-group sections. */
1655 asection
*sec_group
;
1657 /* A linked list of member sections in the group. Circular when used by
1658 the linker. For the SHT_GROUP section, points at first member. */
1659 asection
*next_in_group
;
1661 /* The FDEs associated with this section. The u.fde.next_in_section
1662 field acts as a chain pointer. */
1663 struct eh_cie_fde
*fde_list
;
1665 /* Link from a text section to its .eh_frame_entry section. */
1666 asection
*eh_frame_entry
;
1668 /* A pointer used for various section optimizations. */
1672 #define elf_section_data(sec) ((struct bfd_elf_section_data*)(sec)->used_by_bfd)
1673 #define elf_linked_to_section(sec) (elf_section_data(sec)->linked_to)
1674 #define elf_section_type(sec) (elf_section_data(sec)->this_hdr.sh_type)
1675 #define elf_section_flags(sec) (elf_section_data(sec)->this_hdr.sh_flags)
1676 #define elf_section_info(sec) (elf_section_data(sec)->this_hdr.sh_info)
1677 #define elf_group_name(sec) (elf_section_data(sec)->group.name)
1678 #define elf_group_id(sec) (elf_section_data(sec)->group.id)
1679 #define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group)
1680 #define elf_fde_list(sec) (elf_section_data(sec)->fde_list)
1681 #define elf_sec_group(sec) (elf_section_data(sec)->sec_group)
1682 #define elf_section_eh_frame_entry(sec) (elf_section_data(sec)->eh_frame_entry)
1684 #define xvec_get_elf_backend_data(xvec) \
1685 ((const struct elf_backend_data *) (xvec)->backend_data)
1687 #define get_elf_backend_data(abfd) \
1688 xvec_get_elf_backend_data ((abfd)->xvec)
1690 /* The least object attributes (within an attributes subsection) known
1691 for any target. Some code assumes that the value 0 is not used and
1692 the field for that attribute can instead be used as a marker to
1693 indicate that attributes have been initialized. */
1694 #define LEAST_KNOWN_OBJ_ATTRIBUTE 2
1696 /* The maximum number of known object attributes for any target. */
1697 #define NUM_KNOWN_OBJ_ATTRIBUTES 71
1699 /* The value of an object attribute. The type indicates whether the attribute
1700 holds and integer, a string, or both. It can also indicate that there can
1701 be no default (i.e. all values must be written to file, even zero), or
1702 that the value is in error and should not be written to file. */
1704 typedef struct obj_attribute
1706 #define ATTR_TYPE_FLAG_INT_VAL (1 << 0)
1707 #define ATTR_TYPE_FLAG_STR_VAL (1 << 1)
1708 #define ATTR_TYPE_FLAG_NO_DEFAULT (1 << 2)
1709 #define ATTR_TYPE_FLAG_ERROR (1 << 3)
1711 #define ATTR_TYPE_HAS_INT_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_INT_VAL)
1712 #define ATTR_TYPE_HAS_STR_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_STR_VAL)
1713 #define ATTR_TYPE_HAS_NO_DEFAULT(TYPE) ((TYPE) & ATTR_TYPE_FLAG_NO_DEFAULT)
1714 #define ATTR_TYPE_HAS_ERROR(TYPE) ((TYPE) & ATTR_TYPE_FLAG_ERROR)
1721 typedef struct obj_attribute_list
1723 struct obj_attribute_list
*next
;
1726 } obj_attribute_list
;
1728 /* Object attributes may either be defined by the processor ABI, index
1729 OBJ_ATTR_PROC in the *_obj_attributes arrays, or be GNU-specific
1730 (and possibly also processor-specific), index OBJ_ATTR_GNU. */
1731 #define OBJ_ATTR_PROC 0
1732 #define OBJ_ATTR_GNU 1
1733 #define OBJ_ATTR_FIRST OBJ_ATTR_PROC
1734 #define OBJ_ATTR_LAST OBJ_ATTR_GNU
1736 /* The following object attribute tags are taken as generic, for all
1737 targets and for "gnu" where there is no target standard. */
1744 Tag_compatibility
= 32
1747 /* The following struct stores information about every SystemTap section
1748 found in the object file. */
1751 struct sdt_note
*next
;
1756 /* tdata information grabbed from an elf core file. */
1757 struct core_elf_obj_tdata
1766 /* Extra tdata information held for output ELF BFDs. */
1767 struct output_elf_obj_tdata
1769 struct elf_segment_map
*seg_map
;
1770 struct elf_strtab_hash
*strtab_ptr
;
1772 /* STT_SECTION symbols for each section */
1773 asymbol
**section_syms
;
1775 /* Used to determine if PT_GNU_EH_FRAME segment header should be
1777 asection
*eh_frame_hdr
;
1779 /* NT_GNU_BUILD_ID note type info. */
1782 bfd_boolean (*after_write_object_contents
) (bfd
*);
1787 /* Records the result of `get_program_header_size'. */
1788 bfd_size_type program_header_size
;
1790 /* Used when laying out sections. */
1791 file_ptr next_file_pos
;
1793 int num_section_syms
;
1794 unsigned int shstrtab_section
, strtab_section
;
1796 /* Segment flags for the PT_GNU_STACK segment. */
1797 unsigned int stack_flags
;
1799 /* This is set to TRUE if the object was created by the backend
1803 /* Used to determine if the e_flags field has been initialized */
1804 bfd_boolean flags_init
;
1807 /* Indicate if the bfd contains symbols that have the STT_GNU_IFUNC
1808 symbol type or STB_GNU_UNIQUE binding. Used to set the osabi
1809 field in the ELF header structure. */
1810 enum elf_gnu_symbols
1812 elf_gnu_symbol_none
= 0,
1813 elf_gnu_symbol_any
= 1 << 0,
1814 elf_gnu_symbol_ifunc
= (elf_gnu_symbol_any
| 1 << 1),
1815 elf_gnu_symbol_unique
= (elf_gnu_symbol_any
| 1 << 2),
1816 elf_gnu_symbol_all
= (elf_gnu_symbol_ifunc
| elf_gnu_symbol_unique
)
1819 typedef struct elf_section_list
1821 Elf_Internal_Shdr hdr
;
1823 struct elf_section_list
* next
;
1826 /* Some private data is stashed away for future use using the tdata pointer
1827 in the bfd structure. */
1829 struct elf_obj_tdata
1831 Elf_Internal_Ehdr elf_header
[1]; /* Actual data, but ref like ptr */
1832 Elf_Internal_Shdr
**elf_sect_ptr
;
1833 Elf_Internal_Phdr
*phdr
;
1834 Elf_Internal_Shdr symtab_hdr
;
1835 Elf_Internal_Shdr shstrtab_hdr
;
1836 Elf_Internal_Shdr strtab_hdr
;
1837 Elf_Internal_Shdr dynsymtab_hdr
;
1838 Elf_Internal_Shdr dynstrtab_hdr
;
1839 Elf_Internal_Shdr dynversym_hdr
;
1840 Elf_Internal_Shdr dynverref_hdr
;
1841 Elf_Internal_Shdr dynverdef_hdr
;
1842 elf_section_list
* symtab_shndx_list
;
1843 bfd_vma gp
; /* The gp value */
1844 unsigned int gp_size
; /* The gp size */
1845 unsigned int num_elf_sections
; /* elf_sect_ptr size */
1847 /* A mapping from external symbols to entries in the linker hash
1848 table, used when linking. This is indexed by the symbol index
1849 minus the sh_info field of the symbol table header. */
1850 struct elf_link_hash_entry
**sym_hashes
;
1852 /* Track usage and final offsets of GOT entries for local symbols.
1853 This array is indexed by symbol index. Elements are used
1854 identically to "got" in struct elf_link_hash_entry. */
1857 bfd_signed_vma
*refcounts
;
1859 struct got_entry
**ents
;
1862 /* The linker ELF emulation code needs to let the backend ELF linker
1863 know what filename should be used for a dynamic object if the
1864 dynamic object is found using a search. The emulation code then
1865 sometimes needs to know what name was actually used. Until the
1866 file has been added to the linker symbol table, this field holds
1867 the name the linker wants. After it has been added, it holds the
1868 name actually used, which will be the DT_SONAME entry if there is
1870 const char *dt_name
;
1872 /* The linker emulation needs to know what audit libs
1873 are used by a dynamic object. */
1874 const char *dt_audit
;
1876 /* Used by find_nearest_line entry point. */
1879 /* A place to stash dwarf1 info for this bfd. */
1880 struct dwarf1_debug
*dwarf1_find_line_info
;
1882 /* A place to stash dwarf2 info for this bfd. */
1883 void *dwarf2_find_line_info
;
1885 /* Stash away info for yet another find line/function variant. */
1886 void *elf_find_function_cache
;
1888 /* Number of symbol version definitions we are about to emit. */
1889 unsigned int cverdefs
;
1891 /* Number of symbol version references we are about to emit. */
1892 unsigned int cverrefs
;
1894 /* Symbol version definitions in external objects. */
1895 Elf_Internal_Verdef
*verdef
;
1897 /* Symbol version references to external objects. */
1898 Elf_Internal_Verneed
*verref
;
1900 /* A pointer to the .eh_frame section. */
1901 asection
*eh_frame_section
;
1903 /* Symbol buffer. */
1906 /* List of GNU properties. Will be updated by setup_gnu_properties
1907 after all input GNU properties are merged for output. */
1908 elf_property_list
*properties
;
1910 obj_attribute known_obj_attributes
[2][NUM_KNOWN_OBJ_ATTRIBUTES
];
1911 obj_attribute_list
*other_obj_attributes
[2];
1913 /* Linked-list containing information about every Systemtap section
1914 found in the object file. Each section corresponds to one entry
1916 struct sdt_note
*sdt_note_head
;
1918 Elf_Internal_Shdr
**group_sect_ptr
;
1921 /* Index into group_sect_ptr, updated by setup_group when finding a
1922 section's group. Used to optimize subsequent group searches. */
1923 unsigned int group_search_offset
;
1925 unsigned int symtab_section
, dynsymtab_section
;
1926 unsigned int dynversym_section
, dynverdef_section
, dynverref_section
;
1928 /* An identifier used to distinguish different target
1929 specific extensions to this structure. */
1930 ENUM_BITFIELD (elf_target_id
) object_id
: 6;
1932 /* Whether a dyanmic object was specified normally on the linker
1933 command line, or was specified when --as-needed was in effect,
1934 or was found via a DT_NEEDED entry. */
1935 ENUM_BITFIELD (dynamic_lib_link_class
) dyn_lib_class
: 4;
1937 /* Whether if the bfd contains symbols that have the STT_GNU_IFUNC
1938 symbol type or STB_GNU_UNIQUE binding. */
1939 ENUM_BITFIELD (elf_gnu_symbols
) has_gnu_symbols
: 3;
1941 /* Whether if the bfd contains the GNU_PROPERTY_NO_COPY_ON_PROTECTED
1943 unsigned int has_no_copy_on_protected
: 1;
1945 /* Irix 5 often screws up the symbol table, sorting local symbols
1946 after global symbols. This flag is set if the symbol table in
1947 this BFD appears to be screwed up. If it is, we ignore the
1948 sh_info field in the symbol table header, and always read all the
1950 unsigned int bad_symtab
: 1;
1952 /* Information grabbed from an elf core file. */
1953 struct core_elf_obj_tdata
*core
;
1955 /* More information held for output ELF BFDs. */
1956 struct output_elf_obj_tdata
*o
;
1959 #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
1961 #define elf_object_id(bfd) (elf_tdata(bfd) -> object_id)
1962 #define elf_program_header_size(bfd) (elf_tdata(bfd) -> o->program_header_size)
1963 #define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header)
1964 #define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr)
1965 #define elf_numsections(bfd) (elf_tdata(bfd) -> num_elf_sections)
1966 #define elf_seg_map(bfd) (elf_tdata(bfd) -> o->seg_map)
1967 #define elf_next_file_pos(bfd) (elf_tdata(bfd) -> o->next_file_pos)
1968 #define elf_eh_frame_hdr(bfd) (elf_tdata(bfd) -> o->eh_frame_hdr)
1969 #define elf_linker(bfd) (elf_tdata(bfd) -> o->linker)
1970 #define elf_stack_flags(bfd) (elf_tdata(bfd) -> o->stack_flags)
1971 #define elf_shstrtab(bfd) (elf_tdata(bfd) -> o->strtab_ptr)
1972 #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section)
1973 #define elf_symtab_shndx_list(bfd) (elf_tdata(bfd) -> symtab_shndx_list)
1974 #define elf_strtab_sec(bfd) (elf_tdata(bfd) -> o->strtab_section)
1975 #define elf_shstrtab_sec(bfd) (elf_tdata(bfd) -> o->shstrtab_section)
1976 #define elf_symtab_hdr(bfd) (elf_tdata(bfd) -> symtab_hdr)
1977 #define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section)
1978 #define elf_dynversym(bfd) (elf_tdata(bfd) -> dynversym_section)
1979 #define elf_dynverdef(bfd) (elf_tdata(bfd) -> dynverdef_section)
1980 #define elf_dynverref(bfd) (elf_tdata(bfd) -> dynverref_section)
1981 #define elf_eh_frame_section(bfd) \
1982 (elf_tdata(bfd) -> eh_frame_section)
1983 #define elf_section_syms(bfd) (elf_tdata(bfd) -> o->section_syms)
1984 #define elf_num_section_syms(bfd) (elf_tdata(bfd) -> o->num_section_syms)
1985 #define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
1986 #define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
1987 #define elf_gp(bfd) (elf_tdata(bfd) -> gp)
1988 #define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size)
1989 #define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes)
1990 #define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts)
1991 #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets)
1992 #define elf_local_got_ents(bfd) (elf_tdata(bfd) -> local_got.ents)
1993 #define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name)
1994 #define elf_dt_audit(bfd) (elf_tdata(bfd) -> dt_audit)
1995 #define elf_dyn_lib_class(bfd) (elf_tdata(bfd) -> dyn_lib_class)
1996 #define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab)
1997 #define elf_flags_init(bfd) (elf_tdata(bfd) -> o->flags_init)
1998 #define elf_known_obj_attributes(bfd) (elf_tdata (bfd) -> known_obj_attributes)
1999 #define elf_other_obj_attributes(bfd) (elf_tdata (bfd) -> other_obj_attributes)
2000 #define elf_known_obj_attributes_proc(bfd) \
2001 (elf_known_obj_attributes (bfd) [OBJ_ATTR_PROC])
2002 #define elf_other_obj_attributes_proc(bfd) \
2003 (elf_other_obj_attributes (bfd) [OBJ_ATTR_PROC])
2004 #define elf_properties(bfd) (elf_tdata (bfd) -> properties)
2005 #define elf_has_no_copy_on_protected(bfd) \
2006 (elf_tdata(bfd) -> has_no_copy_on_protected)
2008 extern void _bfd_elf_swap_verdef_in
2009 (bfd
*, const Elf_External_Verdef
*, Elf_Internal_Verdef
*);
2010 extern void _bfd_elf_swap_verdef_out
2011 (bfd
*, const Elf_Internal_Verdef
*, Elf_External_Verdef
*);
2012 extern void _bfd_elf_swap_verdaux_in
2013 (bfd
*, const Elf_External_Verdaux
*, Elf_Internal_Verdaux
*);
2014 extern void _bfd_elf_swap_verdaux_out
2015 (bfd
*, const Elf_Internal_Verdaux
*, Elf_External_Verdaux
*);
2016 extern void _bfd_elf_swap_verneed_in
2017 (bfd
*, const Elf_External_Verneed
*, Elf_Internal_Verneed
*);
2018 extern void _bfd_elf_swap_verneed_out
2019 (bfd
*, const Elf_Internal_Verneed
*, Elf_External_Verneed
*);
2020 extern void _bfd_elf_swap_vernaux_in
2021 (bfd
*, const Elf_External_Vernaux
*, Elf_Internal_Vernaux
*);
2022 extern void _bfd_elf_swap_vernaux_out
2023 (bfd
*, const Elf_Internal_Vernaux
*, Elf_External_Vernaux
*);
2024 extern void _bfd_elf_swap_versym_in
2025 (bfd
*, const Elf_External_Versym
*, Elf_Internal_Versym
*);
2026 extern void _bfd_elf_swap_versym_out
2027 (bfd
*, const Elf_Internal_Versym
*, Elf_External_Versym
*);
2029 extern unsigned int _bfd_elf_section_from_bfd_section
2030 (bfd
*, asection
*);
2031 extern char *bfd_elf_string_from_elf_section
2032 (bfd
*, unsigned, unsigned);
2033 extern Elf_Internal_Sym
*bfd_elf_get_elf_syms
2034 (bfd
*, Elf_Internal_Shdr
*, size_t, size_t, Elf_Internal_Sym
*, void *,
2035 Elf_External_Sym_Shndx
*);
2036 extern const char *bfd_elf_sym_name
2037 (bfd
*, Elf_Internal_Shdr
*, Elf_Internal_Sym
*, asection
*);
2039 extern bfd_boolean _bfd_elf_copy_private_bfd_data
2041 extern bfd_boolean _bfd_elf_print_private_bfd_data
2043 const char * _bfd_elf_get_symbol_version_string
2044 (bfd
*, asymbol
*, bfd_boolean
*);
2045 extern void bfd_elf_print_symbol
2046 (bfd
*, void *, asymbol
*, bfd_print_symbol_type
);
2048 extern unsigned int _bfd_elf_eh_frame_address_size
2049 (bfd
*, const asection
*);
2050 extern bfd_byte _bfd_elf_encode_eh_address
2051 (bfd
*abfd
, struct bfd_link_info
*info
, asection
*osec
, bfd_vma offset
,
2052 asection
*loc_sec
, bfd_vma loc_offset
, bfd_vma
*encoded
);
2053 extern bfd_boolean _bfd_elf_can_make_relative
2054 (bfd
*input_bfd
, struct bfd_link_info
*info
, asection
*eh_frame_section
);
2056 extern enum elf_reloc_type_class _bfd_elf_reloc_type_class
2057 (const struct bfd_link_info
*, const asection
*,
2058 const Elf_Internal_Rela
*);
2059 extern bfd_vma _bfd_elf_rela_local_sym
2060 (bfd
*, Elf_Internal_Sym
*, asection
**, Elf_Internal_Rela
*);
2061 extern bfd_vma _bfd_elf_rel_local_sym
2062 (bfd
*, Elf_Internal_Sym
*, asection
**, bfd_vma
);
2063 extern bfd_vma _bfd_elf_section_offset
2064 (bfd
*, struct bfd_link_info
*, asection
*, bfd_vma
);
2066 extern unsigned long bfd_elf_hash
2068 extern unsigned long bfd_elf_gnu_hash
2071 extern bfd_reloc_status_type bfd_elf_generic_reloc
2072 (bfd
*, arelent
*, asymbol
*, void *, asection
*, bfd
*, char **);
2073 extern bfd_boolean bfd_elf_allocate_object
2074 (bfd
*, size_t, enum elf_target_id
);
2075 extern bfd_boolean bfd_elf_make_object
2077 extern bfd_boolean bfd_elf_mkcorefile
2079 extern bfd_boolean _bfd_elf_make_section_from_shdr
2080 (bfd
*, Elf_Internal_Shdr
*, const char *, int);
2081 extern bfd_boolean _bfd_elf_make_section_from_phdr
2082 (bfd
*, Elf_Internal_Phdr
*, int, const char *);
2083 extern struct bfd_hash_entry
*_bfd_elf_link_hash_newfunc
2084 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *);
2085 extern struct bfd_link_hash_table
*_bfd_elf_link_hash_table_create
2087 extern void _bfd_elf_link_hash_table_free
2089 extern void _bfd_elf_link_hash_copy_indirect
2090 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
2091 struct elf_link_hash_entry
*);
2092 extern void _bfd_elf_link_hash_hide_symbol
2093 (struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd_boolean
);
2094 extern void _bfd_elf_link_hide_symbol
2095 (bfd
*, struct bfd_link_info
*, struct bfd_link_hash_entry
*);
2096 extern bfd_boolean _bfd_elf_link_hash_fixup_symbol
2097 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
2098 extern bfd_boolean _bfd_elf_link_hash_table_init
2099 (struct elf_link_hash_table
*, bfd
*,
2100 struct bfd_hash_entry
*(*)
2101 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *),
2102 unsigned int, enum elf_target_id
);
2103 extern bfd_boolean _bfd_elf_slurp_version_tables
2104 (bfd
*, bfd_boolean
);
2105 extern bfd_boolean _bfd_elf_merge_sections
2106 (bfd
*, struct bfd_link_info
*);
2107 extern bfd_boolean _bfd_elf_match_sections_by_type
2108 (bfd
*, const asection
*, bfd
*, const asection
*);
2109 extern bfd_boolean bfd_elf_is_group_section
2110 (bfd
*, const struct bfd_section
*);
2111 extern bfd_boolean _bfd_elf_section_already_linked
2112 (bfd
*, asection
*, struct bfd_link_info
*);
2113 extern void bfd_elf_set_group_contents
2114 (bfd
*, asection
*, void *);
2115 extern unsigned int _bfd_elf_filter_global_symbols
2116 (bfd
*, struct bfd_link_info
*, asymbol
**, long);
2117 extern asection
*_bfd_elf_check_kept_section
2118 (asection
*, struct bfd_link_info
*);
2119 #define _bfd_elf_link_just_syms _bfd_generic_link_just_syms
2120 extern void _bfd_elf_copy_link_hash_symbol_type
2121 (bfd
*, struct bfd_link_hash_entry
*, struct bfd_link_hash_entry
*);
2122 extern bfd_boolean _bfd_elf_size_group_sections
2123 (struct bfd_link_info
*);
2124 extern bfd_boolean _bfd_elf_fixup_group_sections
2125 (bfd
*, asection
*);
2126 extern bfd_boolean _bfd_elf_copy_private_header_data
2128 extern bfd_boolean _bfd_elf_copy_private_symbol_data
2129 (bfd
*, asymbol
*, bfd
*, asymbol
*);
2130 #define _bfd_generic_init_private_section_data \
2131 _bfd_elf_init_private_section_data
2132 extern bfd_boolean _bfd_elf_init_private_section_data
2133 (bfd
*, asection
*, bfd
*, asection
*, struct bfd_link_info
*);
2134 extern bfd_boolean _bfd_elf_copy_private_section_data
2135 (bfd
*, asection
*, bfd
*, asection
*);
2136 extern bfd_boolean _bfd_elf_write_object_contents
2138 extern bfd_boolean _bfd_elf_write_corefile_contents
2140 extern bfd_boolean _bfd_elf_set_section_contents
2141 (bfd
*, sec_ptr
, const void *, file_ptr
, bfd_size_type
);
2142 extern long _bfd_elf_get_symtab_upper_bound
2144 extern long _bfd_elf_canonicalize_symtab
2145 (bfd
*, asymbol
**);
2146 extern long _bfd_elf_get_dynamic_symtab_upper_bound
2148 extern long _bfd_elf_canonicalize_dynamic_symtab
2149 (bfd
*, asymbol
**);
2150 extern long _bfd_elf_get_synthetic_symtab
2151 (bfd
*, long, asymbol
**, long, asymbol
**, asymbol
**);
2152 extern long _bfd_elf_get_reloc_upper_bound
2154 extern long _bfd_elf_canonicalize_reloc
2155 (bfd
*, sec_ptr
, arelent
**, asymbol
**);
2156 extern asection
* _bfd_elf_get_dynamic_reloc_section
2157 (bfd
*, asection
*, bfd_boolean
);
2158 extern asection
* _bfd_elf_make_dynamic_reloc_section
2159 (asection
*, bfd
*, unsigned int, bfd
*, bfd_boolean
);
2160 extern long _bfd_elf_get_dynamic_reloc_upper_bound
2162 extern long _bfd_elf_canonicalize_dynamic_reloc
2163 (bfd
*, arelent
**, asymbol
**);
2164 extern asymbol
*_bfd_elf_make_empty_symbol
2166 extern void _bfd_elf_get_symbol_info
2167 (bfd
*, asymbol
*, symbol_info
*);
2168 extern bfd_boolean _bfd_elf_is_local_label_name
2169 (bfd
*, const char *);
2170 extern alent
*_bfd_elf_get_lineno
2172 extern bfd_boolean _bfd_elf_set_arch_mach
2173 (bfd
*, enum bfd_architecture
, unsigned long);
2174 extern bfd_boolean _bfd_elf_find_nearest_line
2175 (bfd
*, asymbol
**, asection
*, bfd_vma
,
2176 const char **, const char **, unsigned int *, unsigned int *);
2177 extern bfd_boolean _bfd_elf_find_line
2178 (bfd
*, asymbol
**, asymbol
*, const char **, unsigned int *);
2179 extern bfd_boolean _bfd_elf_find_inliner_info
2180 (bfd
*, const char **, const char **, unsigned int *);
2181 extern asymbol
*_bfd_elf_find_function
2182 (bfd
*, asymbol
**, asection
*, bfd_vma
, const char **, const char **);
2183 #define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols
2184 #define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
2185 extern int _bfd_elf_sizeof_headers
2186 (bfd
*, struct bfd_link_info
*);
2187 extern bfd_boolean _bfd_elf_new_section_hook
2188 (bfd
*, asection
*);
2189 extern const struct bfd_elf_special_section
*_bfd_elf_get_special_section
2190 (const char *, const struct bfd_elf_special_section
*, unsigned int);
2191 extern const struct bfd_elf_special_section
*_bfd_elf_get_sec_type_attr
2192 (bfd
*, asection
*);
2194 extern bfd_boolean _bfd_elf_link_hide_sym_by_version
2195 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
2197 /* If the target doesn't have reloc handling written yet: */
2198 extern bfd_boolean _bfd_elf_no_info_to_howto
2199 (bfd
*, arelent
*, Elf_Internal_Rela
*);
2201 extern bfd_boolean bfd_section_from_shdr
2202 (bfd
*, unsigned int shindex
);
2203 extern bfd_boolean bfd_section_from_phdr
2204 (bfd
*, Elf_Internal_Phdr
*, int);
2206 extern int _bfd_elf_symbol_from_bfd_symbol
2207 (bfd
*, asymbol
**);
2209 extern Elf_Internal_Sym
*bfd_sym_from_r_symndx
2210 (struct sym_cache
*, bfd
*, unsigned long);
2211 extern asection
*bfd_section_from_elf_index
2212 (bfd
*, unsigned int);
2214 extern struct elf_strtab_hash
* _bfd_elf_strtab_init
2216 extern void _bfd_elf_strtab_free
2217 (struct elf_strtab_hash
*);
2218 extern size_t _bfd_elf_strtab_add
2219 (struct elf_strtab_hash
*, const char *, bfd_boolean
);
2220 extern void _bfd_elf_strtab_addref
2221 (struct elf_strtab_hash
*, size_t);
2222 extern void _bfd_elf_strtab_delref
2223 (struct elf_strtab_hash
*, size_t);
2224 extern unsigned int _bfd_elf_strtab_refcount
2225 (struct elf_strtab_hash
*, size_t);
2226 extern void _bfd_elf_strtab_clear_all_refs
2227 (struct elf_strtab_hash
*);
2228 extern void *_bfd_elf_strtab_save
2229 (struct elf_strtab_hash
*);
2230 extern void _bfd_elf_strtab_restore
2231 (struct elf_strtab_hash
*, void *);
2232 extern bfd_size_type _bfd_elf_strtab_size
2233 (struct elf_strtab_hash
*);
2234 extern bfd_size_type _bfd_elf_strtab_offset
2235 (struct elf_strtab_hash
*, size_t);
2236 extern bfd_boolean _bfd_elf_strtab_emit
2237 (bfd
*, struct elf_strtab_hash
*);
2238 extern void _bfd_elf_strtab_finalize
2239 (struct elf_strtab_hash
*);
2241 extern bfd_boolean bfd_elf_parse_eh_frame_entries
2242 (bfd
*, struct bfd_link_info
*);
2243 extern bfd_boolean _bfd_elf_parse_eh_frame_entry
2244 (struct bfd_link_info
*, asection
*, struct elf_reloc_cookie
*);
2245 extern void _bfd_elf_parse_eh_frame
2246 (bfd
*, struct bfd_link_info
*, asection
*, struct elf_reloc_cookie
*);
2247 extern bfd_boolean _bfd_elf_end_eh_frame_parsing
2248 (struct bfd_link_info
*info
);
2250 extern bfd_boolean _bfd_elf_discard_section_eh_frame
2251 (bfd
*, struct bfd_link_info
*, asection
*,
2252 bfd_boolean (*) (bfd_vma
, void *), struct elf_reloc_cookie
*);
2253 extern bfd_boolean _bfd_elf_adjust_eh_frame_global_symbol
2254 (struct elf_link_hash_entry
*, void *);
2255 extern bfd_boolean _bfd_elf_discard_section_eh_frame_hdr
2256 (bfd
*, struct bfd_link_info
*);
2257 extern bfd_vma _bfd_elf_eh_frame_section_offset
2258 (bfd
*, struct bfd_link_info
*, asection
*, bfd_vma
);
2259 extern bfd_boolean _bfd_elf_write_section_eh_frame
2260 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
2261 bfd_boolean _bfd_elf_write_section_eh_frame_entry
2262 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
2263 extern bfd_boolean
_bfd_elf_fixup_eh_frame_hdr (struct bfd_link_info
*);
2264 extern bfd_boolean _bfd_elf_write_section_eh_frame_hdr
2265 (bfd
*, struct bfd_link_info
*);
2266 extern bfd_boolean _bfd_elf_eh_frame_present
2267 (struct bfd_link_info
*);
2268 extern bfd_boolean _bfd_elf_eh_frame_entry_present
2269 (struct bfd_link_info
*);
2270 extern bfd_boolean _bfd_elf_maybe_strip_eh_frame_hdr
2271 (struct bfd_link_info
*);
2273 extern bfd_boolean
_bfd_elf_hash_symbol (struct elf_link_hash_entry
*);
2275 extern long _bfd_elf_link_lookup_local_dynindx
2276 (struct bfd_link_info
*, bfd
*, long);
2277 extern bfd_boolean _bfd_elf_compute_section_file_positions
2278 (bfd
*, struct bfd_link_info
*);
2279 extern file_ptr _bfd_elf_assign_file_position_for_section
2280 (Elf_Internal_Shdr
*, file_ptr
, bfd_boolean
);
2282 extern bfd_boolean _bfd_elf_validate_reloc
2285 extern bfd_boolean _bfd_elf_link_create_dynamic_sections
2286 (bfd
*, struct bfd_link_info
*);
2287 extern bfd_boolean _bfd_elf_omit_section_dynsym_default
2288 (bfd
*, struct bfd_link_info
*, asection
*);
2289 extern bfd_boolean _bfd_elf_omit_section_dynsym_all
2290 (bfd
*, struct bfd_link_info
*, asection
*);
2291 extern bfd_boolean _bfd_elf_create_dynamic_sections
2292 (bfd
*, struct bfd_link_info
*);
2293 extern bfd_boolean _bfd_elf_create_got_section
2294 (bfd
*, struct bfd_link_info
*);
2295 extern asection
*_bfd_elf_section_for_symbol
2296 (struct elf_reloc_cookie
*, unsigned long, bfd_boolean
);
2297 extern struct elf_link_hash_entry
*_bfd_elf_define_linkage_sym
2298 (bfd
*, struct bfd_link_info
*, asection
*, const char *);
2299 extern void _bfd_elf_init_1_index_section
2300 (bfd
*, struct bfd_link_info
*);
2301 extern void _bfd_elf_init_2_index_sections
2302 (bfd
*, struct bfd_link_info
*);
2304 extern bfd_boolean _bfd_elfcore_make_pseudosection
2305 (bfd
*, char *, size_t, ufile_ptr
);
2306 extern char *_bfd_elfcore_strndup
2307 (bfd
*, char *, size_t);
2309 extern Elf_Internal_Rela
*_bfd_elf_link_read_relocs
2310 (bfd
*, asection
*, void *, Elf_Internal_Rela
*, bfd_boolean
);
2312 extern bfd_boolean _bfd_elf_link_output_relocs
2313 (bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*,
2314 struct elf_link_hash_entry
**);
2316 extern bfd_boolean _bfd_elf_adjust_dynamic_copy
2317 (struct bfd_link_info
*, struct elf_link_hash_entry
*, asection
*);
2319 extern bfd_boolean _bfd_elf_dynamic_symbol_p
2320 (struct elf_link_hash_entry
*, struct bfd_link_info
*, bfd_boolean
);
2322 extern bfd_boolean _bfd_elf_symbol_refs_local_p
2323 (struct elf_link_hash_entry
*, struct bfd_link_info
*, bfd_boolean
);
2325 extern bfd_reloc_status_type bfd_elf_perform_complex_relocation
2326 (bfd
*, asection
*, bfd_byte
*, Elf_Internal_Rela
*, bfd_vma
);
2328 extern bfd_boolean _bfd_elf_setup_sections
2331 extern struct bfd_link_hash_entry
*bfd_elf_define_start_stop
2332 (struct bfd_link_info
*, const char *, asection
*);
2334 extern void _bfd_elf_post_process_headers (bfd
* , struct bfd_link_info
*);
2336 extern const bfd_target
*bfd_elf32_object_p
2338 extern const bfd_target
*bfd_elf32_core_file_p
2340 extern char *bfd_elf32_core_file_failing_command
2342 extern int bfd_elf32_core_file_failing_signal
2344 extern bfd_boolean bfd_elf32_core_file_matches_executable_p
2346 extern int bfd_elf32_core_file_pid
2349 extern bfd_boolean bfd_elf32_swap_symbol_in
2350 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
2351 extern void bfd_elf32_swap_symbol_out
2352 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
2353 extern void bfd_elf32_swap_reloc_in
2354 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2355 extern void bfd_elf32_swap_reloc_out
2356 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2357 extern void bfd_elf32_swap_reloca_in
2358 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2359 extern void bfd_elf32_swap_reloca_out
2360 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2361 extern void bfd_elf32_swap_phdr_in
2362 (bfd
*, const Elf32_External_Phdr
*, Elf_Internal_Phdr
*);
2363 extern void bfd_elf32_swap_phdr_out
2364 (bfd
*, const Elf_Internal_Phdr
*, Elf32_External_Phdr
*);
2365 extern void bfd_elf32_swap_dyn_in
2366 (bfd
*, const void *, Elf_Internal_Dyn
*);
2367 extern void bfd_elf32_swap_dyn_out
2368 (bfd
*, const Elf_Internal_Dyn
*, void *);
2369 extern long bfd_elf32_slurp_symbol_table
2370 (bfd
*, asymbol
**, bfd_boolean
);
2371 extern bfd_boolean bfd_elf32_write_shdrs_and_ehdr
2373 extern int bfd_elf32_write_out_phdrs
2374 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
2375 extern bfd_boolean bfd_elf32_checksum_contents
2376 (bfd
* , void (*) (const void *, size_t, void *), void *);
2377 extern void bfd_elf32_write_relocs
2378 (bfd
*, asection
*, void *);
2379 extern bfd_boolean bfd_elf32_slurp_reloc_table
2380 (bfd
*, asection
*, asymbol
**, bfd_boolean
);
2382 extern const bfd_target
*bfd_elf64_object_p
2384 extern const bfd_target
*bfd_elf64_core_file_p
2386 extern char *bfd_elf64_core_file_failing_command
2388 extern int bfd_elf64_core_file_failing_signal
2390 extern bfd_boolean bfd_elf64_core_file_matches_executable_p
2392 extern int bfd_elf64_core_file_pid
2395 extern bfd_boolean bfd_elf64_swap_symbol_in
2396 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
2397 extern void bfd_elf64_swap_symbol_out
2398 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
2399 extern void bfd_elf64_swap_reloc_in
2400 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2401 extern void bfd_elf64_swap_reloc_out
2402 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2403 extern void bfd_elf64_swap_reloca_in
2404 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2405 extern void bfd_elf64_swap_reloca_out
2406 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2407 extern void bfd_elf64_swap_phdr_in
2408 (bfd
*, const Elf64_External_Phdr
*, Elf_Internal_Phdr
*);
2409 extern void bfd_elf64_swap_phdr_out
2410 (bfd
*, const Elf_Internal_Phdr
*, Elf64_External_Phdr
*);
2411 extern void bfd_elf64_swap_dyn_in
2412 (bfd
*, const void *, Elf_Internal_Dyn
*);
2413 extern void bfd_elf64_swap_dyn_out
2414 (bfd
*, const Elf_Internal_Dyn
*, void *);
2415 extern long bfd_elf64_slurp_symbol_table
2416 (bfd
*, asymbol
**, bfd_boolean
);
2417 extern bfd_boolean bfd_elf64_write_shdrs_and_ehdr
2419 extern int bfd_elf64_write_out_phdrs
2420 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
2421 extern bfd_boolean bfd_elf64_checksum_contents
2422 (bfd
* , void (*) (const void *, size_t, void *), void *);
2423 extern void bfd_elf64_write_relocs
2424 (bfd
*, asection
*, void *);
2425 extern bfd_boolean bfd_elf64_slurp_reloc_table
2426 (bfd
*, asection
*, asymbol
**, bfd_boolean
);
2428 extern bfd_boolean _bfd_elf_default_relocs_compatible
2429 (const bfd_target
*, const bfd_target
*);
2431 extern bfd_boolean _bfd_elf_relocs_compatible
2432 (const bfd_target
*, const bfd_target
*);
2433 extern bfd_boolean _bfd_elf_notice_as_needed
2434 (bfd
*, struct bfd_link_info
*, enum notice_asneeded_action
);
2436 extern struct elf_link_hash_entry
*_bfd_elf_archive_symbol_lookup
2437 (bfd
*, struct bfd_link_info
*, const char *);
2438 extern bfd_boolean bfd_elf_link_add_symbols
2439 (bfd
*, struct bfd_link_info
*);
2440 extern bfd_boolean _bfd_elf_add_dynamic_entry
2441 (struct bfd_link_info
*, bfd_vma
, bfd_vma
);
2442 extern bfd_boolean _bfd_elf_link_check_relocs
2443 (bfd
*, struct bfd_link_info
*);
2445 extern bfd_boolean bfd_elf_link_record_dynamic_symbol
2446 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
2448 extern int bfd_elf_link_record_local_dynamic_symbol
2449 (struct bfd_link_info
*, bfd
*, long);
2451 extern bfd_boolean _bfd_elf_close_and_cleanup
2454 extern bfd_boolean _bfd_elf_common_definition
2455 (Elf_Internal_Sym
*);
2457 extern unsigned int _bfd_elf_common_section_index
2460 extern asection
*_bfd_elf_common_section
2463 extern bfd_vma _bfd_elf_default_got_elt_size
2464 (bfd
*, struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd
*,
2467 extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn
2468 (bfd
*, arelent
*, struct bfd_symbol
*, void *,
2469 asection
*, bfd
*, char **);
2471 extern bfd_boolean bfd_elf_final_link
2472 (bfd
*, struct bfd_link_info
*);
2474 extern void _bfd_elf_gc_keep
2475 (struct bfd_link_info
*info
);
2477 extern bfd_boolean bfd_elf_gc_mark_dynamic_ref_symbol
2478 (struct elf_link_hash_entry
*h
, void *inf
);
2480 extern bfd_boolean bfd_elf_gc_sections
2481 (bfd
*, struct bfd_link_info
*);
2483 extern bfd_boolean bfd_elf_gc_record_vtinherit
2484 (bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
);
2486 extern bfd_boolean bfd_elf_gc_record_vtentry
2487 (bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
);
2489 extern asection
*_bfd_elf_gc_mark_hook
2490 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
2491 struct elf_link_hash_entry
*, Elf_Internal_Sym
*);
2493 extern asection
*_bfd_elf_gc_mark_rsec
2494 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
,
2495 struct elf_reloc_cookie
*, bfd_boolean
*);
2497 extern bfd_boolean _bfd_elf_gc_mark_reloc
2498 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
,
2499 struct elf_reloc_cookie
*);
2501 extern bfd_boolean _bfd_elf_gc_mark_fdes
2502 (struct bfd_link_info
*, asection
*, asection
*, elf_gc_mark_hook_fn
,
2503 struct elf_reloc_cookie
*);
2505 extern bfd_boolean _bfd_elf_gc_mark
2506 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
);
2508 extern bfd_boolean _bfd_elf_gc_mark_extra_sections
2509 (struct bfd_link_info
*, elf_gc_mark_hook_fn
);
2511 extern bfd_boolean bfd_elf_gc_common_finalize_got_offsets
2512 (bfd
*, struct bfd_link_info
*);
2514 extern bfd_boolean bfd_elf_gc_common_final_link
2515 (bfd
*, struct bfd_link_info
*);
2517 extern bfd_boolean bfd_elf_reloc_symbol_deleted_p
2520 extern struct elf_segment_map
* _bfd_elf_make_dynamic_segment
2521 (bfd
*, asection
*);
2523 extern bfd_boolean _bfd_elf_map_sections_to_segments
2524 (bfd
*, struct bfd_link_info
*);
2526 extern bfd_boolean
_bfd_elf_is_function_type (unsigned int);
2528 extern bfd_size_type
_bfd_elf_maybe_function_sym (const asymbol
*, asection
*,
2531 extern asection
*_bfd_elf_plt_get_reloc_section (bfd
*, const char *);
2533 extern int bfd_elf_get_default_section_type (flagword
);
2535 extern bfd_boolean bfd_elf_lookup_section_flags
2536 (struct bfd_link_info
*, struct flag_info
*, asection
*);
2538 extern Elf_Internal_Phdr
* _bfd_elf_find_segment_containing_section
2539 (bfd
* abfd
, asection
* section
);
2541 /* PowerPC @tls opcode transform/validate. */
2542 extern unsigned int _bfd_elf_ppc_at_tls_transform
2543 (unsigned int, unsigned int);
2544 /* PowerPC @tprel opcode transform/validate. */
2545 extern unsigned int _bfd_elf_ppc_at_tprel_transform
2546 (unsigned int, unsigned int);
2547 /* PowerPC elf_object_p tweak. */
2548 extern bfd_boolean
_bfd_elf_ppc_set_arch (bfd
*);
2549 /* PowerPC .gnu.attributes handling common to both 32-bit and 64-bit. */
2550 extern bfd_boolean _bfd_elf_ppc_merge_fp_attributes
2551 (bfd
*, struct bfd_link_info
*);
2553 /* Exported interface for writing elf corefile notes. */
2554 extern char *elfcore_write_note
2555 (bfd
*, char *, int *, const char *, int, const void *, int);
2556 extern char *elfcore_write_prpsinfo
2557 (bfd
*, char *, int *, const char *, const char *);
2558 extern char *elfcore_write_prstatus
2559 (bfd
*, char *, int *, long, int, const void *);
2560 extern char * elfcore_write_pstatus
2561 (bfd
*, char *, int *, long, int, const void *);
2562 extern char *elfcore_write_prfpreg
2563 (bfd
*, char *, int *, const void *, int);
2564 extern char *elfcore_write_prxfpreg
2565 (bfd
*, char *, int *, const void *, int);
2566 extern char *elfcore_write_xstatereg
2567 (bfd
*, char *, int *, const void *, int);
2568 extern char *elfcore_write_ppc_vmx
2569 (bfd
*, char *, int *, const void *, int);
2570 extern char *elfcore_write_ppc_vsx
2571 (bfd
*, char *, int *, const void *, int);
2572 extern char *elfcore_write_s390_timer
2573 (bfd
*, char *, int *, const void *, int);
2574 extern char *elfcore_write_s390_todcmp
2575 (bfd
*, char *, int *, const void *, int);
2576 extern char *elfcore_write_s390_todpreg
2577 (bfd
*, char *, int *, const void *, int);
2578 extern char *elfcore_write_s390_ctrs
2579 (bfd
*, char *, int *, const void *, int);
2580 extern char *elfcore_write_s390_prefix
2581 (bfd
*, char *, int *, const void *, int);
2582 extern char *elfcore_write_s390_last_break
2583 (bfd
*, char *, int *, const void *, int);
2584 extern char *elfcore_write_s390_system_call
2585 (bfd
*, char *, int *, const void *, int);
2586 extern char *elfcore_write_s390_tdb
2587 (bfd
*, char *, int *, const void *, int);
2588 extern char *elfcore_write_s390_vxrs_low
2589 (bfd
*, char *, int *, const void *, int);
2590 extern char *elfcore_write_s390_vxrs_high
2591 (bfd
*, char *, int *, const void *, int);
2592 extern char *elfcore_write_s390_gs_cb
2593 (bfd
*, char *, int *, const void *, int);
2594 extern char *elfcore_write_s390_gs_bc
2595 (bfd
*, char *, int *, const void *, int);
2596 extern char *elfcore_write_arm_vfp
2597 (bfd
*, char *, int *, const void *, int);
2598 extern char *elfcore_write_aarch_tls
2599 (bfd
*, char *, int *, const void *, int);
2600 extern char *elfcore_write_aarch_hw_break
2601 (bfd
*, char *, int *, const void *, int);
2602 extern char *elfcore_write_aarch_hw_watch
2603 (bfd
*, char *, int *, const void *, int);
2604 extern char *elfcore_write_aarch_sve
2605 (bfd
*, char *, int *, const void *, int);
2606 extern char *elfcore_write_lwpstatus
2607 (bfd
*, char *, int *, long, int, const void *);
2608 extern char *elfcore_write_register_note
2609 (bfd
*, char *, int *, const char *, const void *, int);
2611 /* Internal structure which holds information to be included in the
2612 PRPSINFO section of Linux core files.
2614 This is an "internal" structure in the sense that it should be used
2615 to pass information to BFD (via the `elfcore_write_linux_prpsinfo'
2616 function), so things like endianess shouldn't be an issue. This
2617 structure will eventually be converted in one of the
2618 `elf_external_linux_*' structures and written out to an output bfd
2619 by one of the functions declared below. */
2621 struct elf_internal_linux_prpsinfo
2623 char pr_state
; /* Numeric process state. */
2624 char pr_sname
; /* Char for pr_state. */
2625 char pr_zomb
; /* Zombie. */
2626 char pr_nice
; /* Nice val. */
2627 unsigned long pr_flag
; /* Flags. */
2628 unsigned int pr_uid
;
2629 unsigned int pr_gid
;
2630 int pr_pid
, pr_ppid
, pr_pgrp
, pr_sid
;
2631 char pr_fname
[16 + 1]; /* Filename of executable. */
2632 char pr_psargs
[80 + 1]; /* Initial part of arg list. */
2635 /* Linux/most 32-bit archs. */
2636 extern char *elfcore_write_linux_prpsinfo32
2637 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
2639 /* Linux/most 64-bit archs. */
2640 extern char *elfcore_write_linux_prpsinfo64
2641 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
2643 extern bfd
*_bfd_elf32_bfd_from_remote_memory
2644 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
2645 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, bfd_size_type
));
2646 extern bfd
*_bfd_elf64_bfd_from_remote_memory
2647 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
2648 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, bfd_size_type
));
2650 extern bfd_vma
bfd_elf_obj_attr_size (bfd
*);
2651 extern void bfd_elf_set_obj_attr_contents (bfd
*, bfd_byte
*, bfd_vma
);
2652 extern int bfd_elf_get_obj_attr_int (bfd
*, int, unsigned int);
2653 extern void bfd_elf_add_obj_attr_int (bfd
*, int, unsigned int, unsigned int);
2654 #define bfd_elf_add_proc_attr_int(BFD, TAG, VALUE) \
2655 bfd_elf_add_obj_attr_int ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2656 extern void bfd_elf_add_obj_attr_string (bfd
*, int, unsigned int, const char *);
2657 #define bfd_elf_add_proc_attr_string(BFD, TAG, VALUE) \
2658 bfd_elf_add_obj_attr_string ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2659 extern void bfd_elf_add_obj_attr_int_string (bfd
*, int, unsigned int,
2660 unsigned int, const char *);
2661 #define bfd_elf_add_proc_attr_int_string(BFD, TAG, INTVAL, STRVAL) \
2662 bfd_elf_add_obj_attr_int_string ((BFD), OBJ_ATTR_PROC, (TAG), \
2665 extern char *_bfd_elf_attr_strdup (bfd
*, const char *);
2666 extern void _bfd_elf_copy_obj_attributes (bfd
*, bfd
*);
2667 extern int _bfd_elf_obj_attrs_arg_type (bfd
*, int, unsigned int);
2668 extern void _bfd_elf_parse_attributes (bfd
*, Elf_Internal_Shdr
*);
2669 extern bfd_boolean _bfd_elf_merge_object_attributes
2670 (bfd
*, struct bfd_link_info
*);
2671 extern bfd_boolean
_bfd_elf_merge_unknown_attribute_low (bfd
*, bfd
*, int);
2672 extern bfd_boolean
_bfd_elf_merge_unknown_attribute_list (bfd
*, bfd
*);
2673 extern Elf_Internal_Shdr
*_bfd_elf_single_rel_hdr (asection
*sec
);
2675 extern bfd_boolean _bfd_elf_parse_gnu_properties
2676 (bfd
*, Elf_Internal_Note
*);
2677 extern elf_property
* _bfd_elf_get_property
2678 (bfd
*, unsigned int, unsigned int);
2679 extern bfd
*_bfd_elf_link_setup_gnu_properties
2680 (struct bfd_link_info
*);
2682 /* The linker may need to keep track of the number of relocs that it
2683 decides to copy as dynamic relocs in check_relocs for each symbol.
2684 This is so that it can later discard them if they are found to be
2685 unnecessary. We can store the information in a field extending the
2686 regular ELF linker hash table. */
2688 struct elf_dyn_relocs
2690 struct elf_dyn_relocs
*next
;
2692 /* The input section of the reloc. */
2695 /* Total number of relocs copied for the input section. */
2696 bfd_size_type count
;
2698 /* Number of pc-relative relocs copied for the input section. */
2699 bfd_size_type pc_count
;
2702 extern bfd_boolean _bfd_elf_create_ifunc_sections
2703 (bfd
*, struct bfd_link_info
*);
2704 extern bfd_boolean _bfd_elf_allocate_ifunc_dyn_relocs
2705 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
2706 struct elf_dyn_relocs
**, bfd_boolean
*, unsigned int,
2707 unsigned int, unsigned int, bfd_boolean
);
2709 extern void elf_append_rela (bfd
*, asection
*, Elf_Internal_Rela
*);
2710 extern void elf_append_rel (bfd
*, asection
*, Elf_Internal_Rela
*);
2712 extern bfd_vma
elf64_r_info (bfd_vma
, bfd_vma
);
2713 extern bfd_vma
elf64_r_sym (bfd_vma
);
2714 extern bfd_vma
elf32_r_info (bfd_vma
, bfd_vma
);
2715 extern bfd_vma
elf32_r_sym (bfd_vma
);
2717 /* Large common section. */
2718 extern asection _bfd_elf_large_com_section
;
2720 /* Hash for local symbol with the first section id, ID, in the input
2721 file and the local symbol index, SYM. */
2722 #define ELF_LOCAL_SYMBOL_HASH(ID, SYM) \
2723 (((((ID) & 0xff) << 24) | (((ID) & 0xff00) << 8)) \
2724 ^ (SYM) ^ ((ID) >> 16))
2726 /* This is the condition under which finish_dynamic_symbol will be called.
2727 If our finish_dynamic_symbol isn't called, we'll need to do something
2728 about initializing any .plt and .got entries in relocate_section. */
2729 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
2731 && ((SHARED) || !(H)->forced_local) \
2732 && ((H)->dynindx != -1 || (H)->forced_local))
2734 /* This macro is to avoid lots of duplicated code in the body
2735 of xxx_relocate_section() in the various elfxx-xxxx.c files. */
2736 #define RELOC_FOR_GLOBAL_SYMBOL(info, input_bfd, input_section, rel, \
2737 r_symndx, symtab_hdr, sym_hashes, \
2738 h, sec, relocation, \
2739 unresolved_reloc, warned, ignored) \
2742 /* It seems this can happen with erroneous or unsupported \
2743 input (mixing a.out and elf in an archive, for example.) */ \
2744 if (sym_hashes == NULL) \
2747 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; \
2749 if (info->wrap_hash != NULL \
2750 && (input_section->flags & SEC_DEBUGGING) != 0) \
2751 h = ((struct elf_link_hash_entry *) \
2752 unwrap_hash_lookup (info, input_bfd, &h->root)); \
2754 while (h->root.type == bfd_link_hash_indirect \
2755 || h->root.type == bfd_link_hash_warning) \
2756 h = (struct elf_link_hash_entry *) h->root.u.i.link; \
2760 unresolved_reloc = FALSE; \
2762 if (h->root.type == bfd_link_hash_defined \
2763 || h->root.type == bfd_link_hash_defweak) \
2765 sec = h->root.u.def.section; \
2767 || sec->output_section == NULL) \
2768 /* Set a flag that will be cleared later if we find a \
2769 relocation value for this symbol. output_section \
2770 is typically NULL for symbols satisfied by a shared \
2772 unresolved_reloc = TRUE; \
2774 relocation = (h->root.u.def.value \
2775 + sec->output_section->vma \
2776 + sec->output_offset); \
2778 else if (h->root.type == bfd_link_hash_undefweak) \
2780 else if (info->unresolved_syms_in_objects == RM_IGNORE \
2781 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) \
2783 else if (!bfd_link_relocatable (info)) \
2786 err = (info->unresolved_syms_in_objects == RM_GENERATE_ERROR \
2787 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT); \
2788 (*info->callbacks->undefined_symbol) (info, \
2789 h->root.root.string, \
2792 rel->r_offset, err); \
2795 (void) unresolved_reloc; \
2801 /* This macro is to avoid lots of duplicated code in the body of the
2802 loop over relocations in xxx_relocate_section() in the various
2805 Handle relocations against symbols from removed linkonce sections,
2806 or sections discarded by a linker script. When doing a relocatable
2807 link, we remove such relocations. Otherwise, we just want the
2808 section contents zeroed and avoid any special processing. */
2809 #define RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
2810 rel, count, relend, \
2811 howto, index, contents) \
2814 _bfd_clear_contents (howto, input_bfd, input_section, \
2815 contents + rel[index].r_offset); \
2817 if (bfd_link_relocatable (info) \
2818 && (input_section->flags & SEC_DEBUGGING)) \
2820 /* Only remove relocations in debug sections since other \
2821 sections may require relocations. */ \
2822 Elf_Internal_Shdr *rel_hdr; \
2824 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
2826 /* Avoid empty output section. */ \
2827 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
2829 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
2830 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
2831 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
2833 memmove (rel, rel + count, \
2834 (relend - rel - count) * sizeof (*rel)); \
2836 input_section->reloc_count -= count; \
2843 for (i_ = 0; i_ < count; i_++) \
2845 rel[i_].r_info = 0; \
2846 rel[i_].r_addend = 0; \
2852 /* Will a symbol be bound to the definition within the shared
2853 library, if any. A unique symbol can never be bound locally. */
2854 #define SYMBOLIC_BIND(INFO, H) \
2855 (!(H)->unique_global \
2856 && ((INFO)->symbolic \
2857 || (H)->start_stop \
2858 || ((INFO)->dynamic && !(H)->dynamic)))
2863 #endif /* _LIBELF_H_ */