1 /* BFD back-end data structures for ELF files.
2 Copyright (C) 1992-2023 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. */
27 #include "elf/common.h"
28 #include "elf/external.h"
29 #include "elf/internal.h"
32 #ifndef ENABLE_CHECKING
33 #define ENABLE_CHECKING 0
40 /* The number of entries in a section is its size divided by the size
41 of a single entry. This is normally only applicable to reloc and
42 symbol table sections.
43 PR 9934: It is possible to have relocations that do not refer to
44 symbols, thus it is also possible to have a relocation section in
45 an object file, but no symbol table. */
46 #define NUM_SHDR_ENTRIES(shdr) ((shdr)->sh_entsize > 0 ? (shdr)->sh_size / (shdr)->sh_entsize : 0)
48 /* If size isn't specified as 64 or 32, NAME macro should fail. */
51 #define NAME(x, y) x ## 64 ## _ ## y
54 #define NAME(x, y) x ## 32 ## _ ## y
59 #define NAME(x, y) x ## NOSIZE ## _ ## y
62 #define ElfNAME(X) NAME(Elf,X)
63 #define elfNAME(X) NAME(elf,X)
65 /* Information held for an ELF symbol. The first field is the
66 corresponding asymbol. Every symbol is an ELF file is actually a
67 pointer to this structure, although it is often handled as a
68 pointer to an asymbol. */
74 /* ELF symbol information. */
75 Elf_Internal_Sym internal_elf_sym
;
76 /* Backend specific information. */
79 unsigned int hppa_arg_reloc
;
85 /* Version information. This is from an Elf_Internal_Versym
86 structure in a SHT_GNU_versym section. It is zero if there is no
87 version information. */
88 unsigned short version
;
92 struct elf_strtab_hash
;
98 bfd_signed_vma refcount
;
100 struct got_entry
*glist
;
101 struct plt_entry
*plist
;
104 struct elf_link_virtual_table_entry
106 /* Virtual table entry use information. This array is nominally of size
107 size/sizeof(target_void_pointer), though we have to be able to assume
108 and track a size while the symbol is still undefined. It is indexed
109 via offset/sizeof(target_void_pointer). */
113 /* Virtual table derivation info. */
114 struct elf_link_hash_entry
*parent
;
117 /* ELF symbol version. */
118 enum elf_symbol_version
126 /* ELF linker hash table entries. */
128 struct elf_link_hash_entry
130 struct bfd_link_hash_entry root
;
132 /* Symbol index in output file. This is initialized to -1. It is
133 set to -2 if the symbol is used by a reloc. It is set to -3 if
134 this symbol is defined in a discarded section. */
137 /* Symbol index as a dynamic symbol. Initialized to -1, and remains
138 -1 if this is not a dynamic symbol. */
139 /* ??? Note that this is consistently used as a synonym for tests
140 against whether we can perform various simplifying transformations
141 to the code. (E.g. changing a pc-relative jump to a PLT entry
142 into a pc-relative jump to the target function.) That test, which
143 is often relatively complex, and someplaces wrong or incomplete,
144 should really be replaced by a predicate in elflink.c.
146 End result: this field -1 does not indicate that the symbol is
147 not in the dynamic symbol table, but rather that the symbol is
148 not visible outside this DSO. */
151 /* If this symbol requires an entry in the global offset table, the
152 processor specific backend uses this field to track usage and
153 final offset. Two schemes are supported: The first assumes that
154 a symbol may only have one GOT entry, and uses REFCOUNT until
155 size_dynamic_sections, at which point the contents of the .got is
156 fixed. Afterward, if OFFSET is -1, then the symbol does not
157 require a global offset table entry. The second scheme allows
158 multiple GOT entries per symbol, managed via a linked list
159 pointed to by GLIST. */
160 union gotplt_union got
;
162 /* Same, but tracks a procedure linkage table entry. */
163 union gotplt_union plt
;
165 /* Symbol size. NB: All fields starting from here are cleared by
166 _bfd_elf_link_hash_newfunc. */
169 /* Track dynamic relocs copied for this symbol. */
170 struct elf_dyn_relocs
*dyn_relocs
;
172 /* Symbol type (STT_NOTYPE, STT_OBJECT, etc.). */
173 unsigned int type
: 8;
175 /* Symbol st_other value, symbol visibility. */
176 unsigned int other
: 8;
178 /* The symbol's st_target_internal value (see Elf_Internal_Sym). */
179 unsigned int target_internal
: 8;
181 /* Symbol is referenced by a non-shared object (other than the object
182 in which it is defined). */
183 unsigned int ref_regular
: 1;
184 /* Symbol is defined by a non-shared object. */
185 unsigned int def_regular
: 1;
186 /* Symbol is referenced by a shared object. */
187 unsigned int ref_dynamic
: 1;
188 /* Symbol is defined by a shared object. */
189 unsigned int def_dynamic
: 1;
190 /* Symbol has a non-weak reference from a non-shared object (other than
191 the object in which it is defined). */
192 unsigned int ref_regular_nonweak
: 1;
193 /* Symbol has a non-weak reference from a LTO IR object file. */
194 unsigned int ref_ir_nonweak
: 1;
195 /* Dynamic symbol has been adjustd. */
196 unsigned int dynamic_adjusted
: 1;
197 /* Symbol needs a copy reloc. */
198 unsigned int needs_copy
: 1;
199 /* Symbol needs a procedure linkage table entry. */
200 unsigned int needs_plt
: 1;
201 /* Symbol appears in a non-ELF input file. */
202 unsigned int non_elf
: 1;
203 /* Symbol version information. */
204 ENUM_BITFIELD (elf_symbol_version
) versioned
: 2;
205 /* Symbol was forced to local scope due to a version script file. */
206 unsigned int forced_local
: 1;
207 /* Symbol was forced to be dynamic due to a version script file. */
208 unsigned int dynamic
: 1;
209 /* Symbol was marked during garbage collection. */
210 unsigned int mark
: 1;
211 /* Symbol is referenced by a non-GOT/non-PLT relocation. This is
212 not currently set by all the backends. */
213 unsigned int non_got_ref
: 1;
214 /* Symbol has a definition in a shared object.
215 FIXME: There is no real need for this field if def_dynamic is never
216 cleared and all places that test def_dynamic also test def_regular. */
217 unsigned int dynamic_def
: 1;
218 /* Symbol has a non-weak reference from a shared object. */
219 unsigned int ref_dynamic_nonweak
: 1;
220 /* Symbol is referenced with a relocation where C/C++ pointer equality
222 unsigned int pointer_equality_needed
: 1;
223 /* Symbol is a unique global symbol. */
224 unsigned int unique_global
: 1;
225 /* Symbol is defined by a shared library with non-default visibility
226 in a read/write section. */
227 unsigned int protected_def
: 1;
228 /* Symbol is __start_SECNAME or __stop_SECNAME to mark section
230 unsigned int start_stop
: 1;
231 /* Symbol is or was a weak defined symbol from a dynamic object with
232 a strong defined symbol alias. U.ALIAS points to a list of aliases,
233 the definition having is_weakalias clear. */
234 unsigned int is_weakalias
: 1;
236 /* String table index in .dynstr if this is a dynamic symbol. */
237 unsigned long dynstr_index
;
241 /* Points to a circular list of non-function symbol aliases. */
242 struct elf_link_hash_entry
*alias
;
244 /* Hash value of the name computed using the ELF hash function.
245 Used part way through size_dynamic_sections, after we've finished
247 unsigned long elf_hash_value
;
250 /* Version information. */
253 /* This field is used for a symbol which is not defined in a
254 regular object. It points to the version information read in
255 from the dynamic object. */
256 Elf_Internal_Verdef
*verdef
;
257 /* This field is used for a symbol which is defined in a regular
258 object. It is set up in size_dynamic_sections. It points to
259 the version information we should write out for this symbol. */
260 struct bfd_elf_version_tree
*vertree
;
265 /* For __start_SECNAME and __stop_SECNAME symbols, record the first
266 input section whose section name is SECNAME. */
267 asection
*start_stop_section
;
269 /* Vtable information. */
270 struct elf_link_virtual_table_entry
*vtable
;
274 /* Return the strong definition for a weak symbol with aliases. */
276 static inline struct elf_link_hash_entry
*
277 weakdef (struct elf_link_hash_entry
*h
)
279 while (h
->is_weakalias
)
284 /* Will references to this symbol always reference the symbol
286 #define SYMBOL_REFERENCES_LOCAL(INFO, H) \
287 _bfd_elf_symbol_refs_local_p (H, INFO, 0)
289 /* Will _calls_ to this symbol always call the version in this object? */
290 #define SYMBOL_CALLS_LOCAL(INFO, H) \
291 _bfd_elf_symbol_refs_local_p (H, INFO, 1)
293 /* Whether an undefined weak symbol should resolve to its link-time
294 value, even in PIC or PIE objects. The linker_def test is to
295 handle symbols like __ehdr_start that may be undefweak in early
296 stages of linking but are guaranteed to be defined later. */
297 #define UNDEFWEAK_NO_DYNAMIC_RELOC(INFO, H) \
298 ((H)->root.type == bfd_link_hash_undefweak \
299 && !(H)->root.linker_def \
300 && (ELF_ST_VISIBILITY ((H)->other) != STV_DEFAULT \
301 || (INFO)->dynamic_undefined_weak == 0))
303 /* Common symbols that are turned into definitions don't have the
304 DEF_REGULAR flag set, so they might appear to be undefined.
305 Symbols defined in linker scripts also don't have DEF_REGULAR set. */
306 #define ELF_COMMON_DEF_P(H) \
308 && !(H)->def_dynamic \
309 && (H)->root.type == bfd_link_hash_defined)
311 /* Records local symbols to be emitted in the dynamic symbol table. */
313 struct elf_link_local_dynamic_entry
315 struct elf_link_local_dynamic_entry
*next
;
317 /* The input bfd this symbol came from. */
320 /* The index of the local symbol being copied. */
323 /* The index in the outgoing dynamic symbol table. */
326 /* A copy of the input symbol. */
327 Elf_Internal_Sym isym
;
330 struct elf_link_loaded_list
332 struct elf_link_loaded_list
*next
;
336 /* Structures used by the eh_frame optimization code. */
341 /* If REMOVED == 1, this is the CIE that the FDE originally used.
342 The CIE belongs to the same .eh_frame input section as the FDE.
344 If REMOVED == 0, this is the CIE that we have chosen to use for
345 the output FDE. The CIE's REMOVED field is also 0, but the CIE
346 might belong to a different .eh_frame input section from the FDE.
348 May be NULL to signify that the FDE should be discarded. */
349 struct eh_cie_fde
*cie_inf
;
350 struct eh_cie_fde
*next_for_section
;
353 /* CIEs have three states:
355 - REMOVED && !MERGED: Slated for removal because we haven't yet
356 proven that an FDE needs it. FULL_CIE, if nonnull, points to
357 more detailed information about the CIE.
359 - REMOVED && MERGED: We have merged this CIE with MERGED_WITH,
360 which may not belong to the same input section.
362 - !REMOVED: We have decided to keep this CIE. SEC is the
363 .eh_frame input section that contains the CIE. */
365 struct cie
*full_cie
;
366 struct eh_cie_fde
*merged_with
;
370 /* The offset of the personality data from the start of the CIE,
371 or 0 if the CIE doesn't have any. */
372 unsigned int personality_offset
: 8;
374 /* Length of augmentation. aug_str_len is the length of the
375 string including null terminator. aug_data_len is the length
376 of the rest up to the initial insns. */
377 unsigned int aug_str_len
: 3;
378 unsigned int aug_data_len
: 5;
380 /* True if we have marked relocations associated with this CIE. */
381 unsigned int gc_mark
: 1;
383 /* True if we have decided to turn an absolute LSDA encoding into
384 a PC-relative one. */
385 unsigned int make_lsda_relative
: 1;
387 /* True if we have decided to turn an absolute personality
388 encoding into a PC-relative one. */
389 unsigned int make_per_encoding_relative
: 1;
391 /* True if the CIE contains personality data and if that
392 data uses a PC-relative encoding. Always true when
393 make_per_encoding_relative is. */
394 unsigned int per_encoding_relative
: 1;
396 /* True if the CIE contains personality data aligned to a
397 multiple of eight bytes. */
398 unsigned int per_encoding_aligned8
: 1;
400 /* True if we need to add an 'R' (FDE encoding) entry to the
401 CIE's augmentation data. */
402 unsigned int add_fde_encoding
: 1;
404 /* True if we have merged this CIE with another. */
405 unsigned int merged
: 1;
408 unsigned int pad1
: 9;
411 unsigned int reloc_index
;
414 unsigned int new_offset
;
415 unsigned int fde_encoding
: 8;
416 unsigned int lsda_encoding
: 8;
417 unsigned int lsda_offset
: 8;
419 /* True if this entry represents a CIE, false if it represents an FDE. */
420 unsigned int cie
: 1;
422 /* True if this entry is currently marked for removal. */
423 unsigned int removed
: 1;
425 /* True if we need to add a 'z' (augmentation size) entry to the CIE's
426 augmentation data, and an associated byte to each of the CIE's FDEs. */
427 unsigned int add_augmentation_size
: 1;
429 /* True if we have decided to convert absolute FDE relocations into
430 relative ones. This applies to the first relocation in the FDE,
431 which is against the code that the FDE describes. */
432 unsigned int make_relative
: 1;
435 unsigned int pad1
: 4;
437 unsigned int *set_loc
;
440 struct eh_frame_sec_info
444 struct eh_cie_fde entry
[1];
447 struct eh_frame_array_ent
456 #define DWARF2_EH_HDR 1
457 #define COMPACT_EH_HDR 2
459 /* Endian-neutral code indicating that a function cannot be unwound. */
460 #define COMPACT_EH_CANT_UNWIND_OPCODE 0x015d5d01
462 struct dwarf_eh_frame_hdr_info
465 unsigned int fde_count
;
466 /* TRUE if .eh_frame_hdr should contain the sorted search table.
467 We build it if we successfully read all .eh_frame input sections
468 and recognize them. */
470 struct eh_frame_array_ent
*array
;
473 struct compact_eh_frame_hdr_info
475 unsigned int allocated_entries
;
476 /* eh_frame_entry fragments. */
480 struct eh_frame_hdr_info
483 unsigned int array_count
;
484 bool frame_hdr_is_compact
;
487 struct dwarf_eh_frame_hdr_info dwarf
;
488 struct compact_eh_frame_hdr_info compact
;
493 /* Additional information for each function (used at link time). */
494 struct sframe_func_bfdinfo
496 /* Whether the function has been discarded from the final output. */
498 /* Relocation offset. */
499 unsigned int func_r_offset
;
500 /* Relocation index. */
501 unsigned int func_reloc_index
;
504 /* SFrame decoder info.
505 Contains all information for a decoded .sframe section. */
506 struct sframe_dec_info
508 /* Decoder context. */
509 struct sframe_decoder_ctx
*sfd_ctx
;
510 /* Number of function descriptor entries in this .sframe. */
511 unsigned int sfd_fde_count
;
512 /* Additional information for linking. */
513 struct sframe_func_bfdinfo
*sfd_func_bfdinfo
;
516 /* SFrame encoder info.
517 Contains all information for an encoded .sframe section to be
519 struct sframe_enc_info
521 /* Encoder context. */
522 struct sframe_encoder_ctx
*sfe_ctx
;
523 /* Output section. */
524 asection
*sframe_section
;
527 /* Enum used to identify target specific extensions to the elf_obj_tdata
528 and elf_link_hash_table structures. Note the enums deliberately start
529 from 1 so that we can detect an uninitialized field. The generic value
530 is last so that additions to this enum do not need to modify more than
534 AARCH64_ELF_DATA
= 1,
577 struct elf_sym_strtab
579 Elf_Internal_Sym sym
;
580 unsigned long dest_index
;
583 struct bfd_link_needed_list
585 struct bfd_link_needed_list
*next
;
593 is_solaris
, /* Solaris. */
594 is_vxworks
, /* VxWorks. */
595 is_nacl
/* Native Client. */
598 /* Used by bfd_sym_from_r_symndx to cache a small number of local
600 #define LOCAL_SYM_CACHE_SIZE 32
604 unsigned long indx
[LOCAL_SYM_CACHE_SIZE
];
605 Elf_Internal_Sym sym
[LOCAL_SYM_CACHE_SIZE
];
608 /* ELF linker hash table. */
610 struct elf_link_hash_table
612 struct bfd_link_hash_table root
;
614 /* An identifier used to distinguish different target
615 specific extensions to this structure. */
616 enum elf_target_id hash_table_id
;
618 /* Whether we have created the special dynamic sections required
619 when linking against or generating a shared object. */
620 bool dynamic_sections_created
;
622 /* Whether dynamic relocations are present. */
625 /* True if this target has relocatable executables, so needs dynamic
627 bool is_relocatable_executable
;
629 /* TRUE if there are IFUNC resolvers. */
630 bool ifunc_resolvers
;
632 /* TRUE if DT_PLTGOT is a required dynamic tag. */
633 bool dt_pltgot_required
;
635 /* TRUE if DT_JMPREL is a required dynamic tag. */
636 bool dt_jmprel_required
;
638 /* TRUE when we are handling DT_NEEDED entries. */
639 bool handling_dt_needed
;
641 /* The BFD used to hold special sections created by the linker.
642 This will be the first BFD found which requires these sections to
646 /* The value to use when initialising got.refcount/offset and
647 plt.refcount/offset in an elf_link_hash_entry. Set to zero when
648 the values are refcounts. Set to init_got_offset/init_plt_offset
649 in size_dynamic_sections when the values may be offsets. */
650 union gotplt_union init_got_refcount
;
651 union gotplt_union init_plt_refcount
;
653 /* The value to use for got.refcount/offset and plt.refcount/offset
654 when the values may be offsets. Normally (bfd_vma) -1. */
655 union gotplt_union init_got_offset
;
656 union gotplt_union init_plt_offset
;
658 /* The number of symbols found in the link which is intended for the
659 mandatory DT_SYMTAB tag (.dynsym section) in .dynamic section. */
660 bfd_size_type dynsymcount
;
661 bfd_size_type local_dynsymcount
;
663 /* The string table of dynamic symbols, which becomes the .dynstr
665 struct elf_strtab_hash
*dynstr
;
667 /* The array size of the symbol string table, which becomes the
669 bfd_size_type strtabsize
;
671 /* The array of strings, which becomes the .strtab section. */
672 struct elf_sym_strtab
*strtab
;
674 /* The number of buckets in the hash table in the .hash section.
675 This is based on the number of dynamic symbols. */
676 bfd_size_type bucketcount
;
678 /* A linked list of DT_NEEDED names found in dynamic objects
679 included in the link. */
680 struct bfd_link_needed_list
*needed
;
682 /* Sections in the output bfd that provides a section symbol
683 to be used by relocations emitted against local symbols.
684 Most targets will not use data_index_section. */
685 asection
*text_index_section
;
686 asection
*data_index_section
;
688 /* The _GLOBAL_OFFSET_TABLE_ symbol. */
689 struct elf_link_hash_entry
*hgot
;
691 /* The _PROCEDURE_LINKAGE_TABLE_ symbol. */
692 struct elf_link_hash_entry
*hplt
;
694 /* The _DYNAMIC symbol. */
695 struct elf_link_hash_entry
*hdynamic
;
697 /* A pointer to information used to merge SEC_MERGE sections. */
700 /* Used to link stabs in sections. */
701 struct stab_info stab_info
;
703 /* Used by eh_frame code when editing .eh_frame. */
704 struct eh_frame_hdr_info eh_info
;
706 /* Used to link stack trace info in .sframe sections. */
707 struct sframe_enc_info sfe_info
;
709 /* A linked list of local symbols to be added to .dynsym. */
710 struct elf_link_local_dynamic_entry
*dynlocal
;
712 /* A linked list of DT_RPATH/DT_RUNPATH names found in dynamic
713 objects included in the link. */
714 struct bfd_link_needed_list
*runpath
;
716 /* Cached first output tls section and size of PT_TLS segment. */
718 bfd_size_type tls_size
; /* Bytes. */
720 /* The offset into splt of the PLT entry for the TLS descriptor
721 resolver. Special values are 0, if not necessary (or not found
722 to be necessary yet), and -1 if needed but not determined
726 /* The GOT offset for the lazy trampoline. Communicated to the
727 loader via DT_TLSDESC_GOT. The magic value (bfd_vma) -1
728 indicates an offset is not allocated. */
731 /* Target OS for linker output. */
732 enum elf_target_os target_os
;
734 /* A linked list of dynamic BFD's loaded in the link. */
735 struct elf_link_loaded_list
*dyn_loaded
;
737 /* Small local sym cache. */
738 struct sym_cache sym_cache
;
740 /* Short-cuts to get to dynamic linker sections. */
749 asection
*sreldynrelro
;
758 /* Returns TRUE if the hash table is a struct elf_link_hash_table. */
761 is_elf_hash_table (const struct bfd_link_hash_table
*htab
)
763 return htab
->type
== bfd_link_elf_hash_table
;
766 /* Look up an entry in an ELF linker hash table. */
768 static inline struct elf_link_hash_entry
*
769 elf_link_hash_lookup (struct elf_link_hash_table
*table
, const char *string
,
770 bool create
, bool copy
, bool follow
)
772 if (ENABLE_CHECKING
&& !is_elf_hash_table (&table
->root
))
774 return (struct elf_link_hash_entry
*)
775 bfd_link_hash_lookup (&table
->root
, string
, create
, copy
, follow
);
778 /* Traverse an ELF linker hash table. */
781 elf_link_hash_traverse (struct elf_link_hash_table
*table
,
782 bool (*f
) (struct elf_link_hash_entry
*, void *),
785 if (ENABLE_CHECKING
&& !is_elf_hash_table (&table
->root
))
787 bfd_link_hash_traverse (&table
->root
,
788 (bool (*) (struct bfd_link_hash_entry
*, void *)) f
,
792 /* Get the ELF linker hash table from a link_info structure. */
794 static inline struct elf_link_hash_table
*
795 elf_hash_table (const struct bfd_link_info
*info
)
797 return (struct elf_link_hash_table
*) info
->hash
;
800 static inline enum elf_target_id
801 elf_hash_table_id (const struct elf_link_hash_table
*table
)
803 return table
->hash_table_id
;
806 /* Constant information held for an ELF backend. */
808 struct elf_size_info
{
809 unsigned char sizeof_ehdr
, sizeof_phdr
, sizeof_shdr
;
810 unsigned char sizeof_rel
, sizeof_rela
, sizeof_sym
, sizeof_dyn
, sizeof_note
;
812 /* The size of entries in the .hash section. */
813 unsigned char sizeof_hash_entry
;
815 /* The number of internal relocations to allocate per external
817 unsigned char int_rels_per_ext_rel
;
818 /* We use some fixed size arrays. This should be large enough to
819 handle all back-ends. */
820 #define MAX_INT_RELS_PER_EXT_REL 3
822 unsigned char arch_size
, log_file_align
;
823 unsigned char elfclass
, ev_current
;
824 int (*write_out_phdrs
)
825 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
826 bool (*write_shdrs_and_ehdr
) (bfd
*);
827 bool (*checksum_contents
)
828 (bfd
* , void (*) (const void *, size_t, void *), void *);
830 (bfd
*, asection
*, void *);
831 bool (*swap_symbol_in
)
832 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
833 void (*swap_symbol_out
)
834 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
835 bool (*slurp_reloc_table
)
836 (bfd
*, asection
*, asymbol
**, bool);
837 long (*slurp_symbol_table
)
838 (bfd
*, asymbol
**, bool);
840 (bfd
*, const void *, Elf_Internal_Dyn
*);
842 (bfd
*, const Elf_Internal_Dyn
*, void *);
844 /* This function is called to swap in a REL relocation. If an
845 external relocation corresponds to more than one internal
846 relocation, then all relocations are swapped in at once. */
847 void (*swap_reloc_in
)
848 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
850 /* This function is called to swap out a REL relocation. */
851 void (*swap_reloc_out
)
852 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
854 /* This function is called to swap in a RELA relocation. If an
855 external relocation corresponds to more than one internal
856 relocation, then all relocations are swapped in at once. */
857 void (*swap_reloca_in
)
858 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
860 /* This function is called to swap out a RELA relocation. */
861 void (*swap_reloca_out
)
862 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
865 #define elf_symbol_from(S) \
866 ((((S)->flags & BSF_SYNTHETIC) == 0 \
867 && (S)->the_bfd != NULL \
868 && (S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \
869 && (S)->the_bfd->tdata.elf_obj_data != 0) \
870 ? (elf_symbol_type *) (S) \
873 enum elf_reloc_type_class
{
875 reloc_class_relative
,
881 struct elf_reloc_cookie
883 Elf_Internal_Rela
*rels
, *rel
, *relend
;
884 Elf_Internal_Sym
*locsyms
;
888 struct elf_link_hash_entry
**sym_hashes
;
893 /* The level of IRIX compatibility we're striving for. */
901 /* Mapping of ELF section names and types. */
902 struct bfd_elf_special_section
905 unsigned int prefix_length
;
906 /* 0 means name must match PREFIX exactly.
907 -1 means name must start with PREFIX followed by an arbitrary string.
908 -2 means name must match PREFIX exactly or consist of PREFIX followed
909 by a dot then anything.
910 > 0 means name must start with the first PREFIX_LENGTH chars of
911 PREFIX and finish with the last SUFFIX_LENGTH chars of PREFIX. */
912 signed int suffix_length
;
917 enum action_discarded
923 typedef asection
* (*elf_gc_mark_hook_fn
)
924 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
925 struct elf_link_hash_entry
*, Elf_Internal_Sym
*);
927 enum elf_property_kind
929 /* A new property. */
930 property_unknown
= 0,
931 /* A property ignored by backend. */
933 /* A corrupt property reported by backend. */
935 /* A property should be removed due to property merge. */
937 /* A property which is a number. */
941 typedef struct elf_property
943 unsigned int pr_type
;
944 unsigned int pr_datasz
;
947 /* For property_number, this is a number. */
949 /* Add a new one if elf_property_kind is updated. */
951 enum elf_property_kind pr_kind
;
954 typedef struct elf_property_list
956 struct elf_property_list
*next
;
957 struct elf_property property
;
960 struct bfd_elf_section_reloc_data
;
962 struct elf_backend_data
964 /* The architecture for this backend. */
965 enum bfd_architecture arch
;
967 /* An identifier used to distinguish different target specific
968 extensions to elf_obj_tdata and elf_link_hash_table structures. */
969 enum elf_target_id target_id
;
972 enum elf_target_os target_os
;
974 /* The ELF machine code (EM_xxxx) for this backend. */
975 int elf_machine_code
;
980 /* The maximum page size for this backend. */
983 /* The minimum page size for this backend. An input object will not be
984 considered page aligned unless its sections are correctly aligned for
985 pages at least this large. May be smaller than maxpagesize. */
988 /* The common page size for this backend. */
989 bfd_vma commonpagesize
;
991 /* The p_align value for this backend. If it is set, p_align of
992 PT_LOAD alignment will be to p_align by default. */
995 /* The BFD flags applied to sections created for dynamic linking. */
996 flagword dynamic_sec_flags
;
998 /* Architecture-specific data for this backend.
999 This is actually a pointer to some type like struct elf_ARCH_data. */
1000 const void *arch_data
;
1002 /* A function to translate an ELF RELA relocation to a BFD arelent
1003 structure. Returns TRUE upon success, FALSE otherwise. */
1004 bool (*elf_info_to_howto
)
1005 (bfd
*, arelent
*, Elf_Internal_Rela
*);
1007 /* A function to translate an ELF REL relocation to a BFD arelent
1008 structure. Returns TRUE upon success, FALSE otherwise. */
1009 bool (*elf_info_to_howto_rel
)
1010 (bfd
*, arelent
*, Elf_Internal_Rela
*);
1012 /* A function to determine whether a symbol is global when
1013 partitioning the symbol table into local and global symbols.
1014 This should be NULL for most targets, in which case the correct
1015 thing will be done. MIPS ELF, at least on the Irix 5, has
1016 special requirements. */
1017 bool (*elf_backend_sym_is_global
)
1020 /* The remaining functions are hooks which are called only if they
1023 /* A function to permit a backend specific check on whether a
1024 particular BFD format is relevant for an object file, and to
1025 permit the backend to set any global information it wishes. When
1026 this is called elf_elfheader is set, but anything else should be
1027 used with caution. If this returns FALSE, the check_format
1028 routine will return a bfd_error_wrong_format error. */
1029 bool (*elf_backend_object_p
)
1032 /* A function to do additional symbol processing when reading the
1033 ELF symbol table. This is where any processor-specific special
1034 section indices are handled. */
1035 void (*elf_backend_symbol_processing
)
1038 /* A function to do additional symbol processing after reading the
1039 entire ELF symbol table. */
1040 bool (*elf_backend_symbol_table_processing
)
1041 (bfd
*, elf_symbol_type
*, unsigned int);
1043 /* A function to set the type of the info field. Processor-specific
1044 types should be handled here. */
1045 int (*elf_backend_get_symbol_type
)
1046 (Elf_Internal_Sym
*, int);
1048 /* A function to return the linker hash table entry of a symbol that
1049 might be satisfied by an archive symbol. */
1050 struct bfd_link_hash_entry
* (*elf_backend_archive_symbol_lookup
)
1051 (bfd
*, struct bfd_link_info
*, const char *);
1053 /* Return true if local section symbols should have a non-null st_name.
1054 NULL implies false. */
1055 bool (*elf_backend_name_local_section_symbols
)
1058 /* A function to do additional processing on the ELF section header
1059 just before writing it out. This is used to set the flags and
1060 type fields for some sections, or to actually write out data for
1061 unusual sections. */
1062 bool (*elf_backend_section_processing
)
1063 (bfd
*, Elf_Internal_Shdr
*);
1065 /* A function to handle unusual section types when creating BFD
1066 sections from ELF sections. */
1067 bool (*elf_backend_section_from_shdr
)
1068 (bfd
*, Elf_Internal_Shdr
*, const char *, int);
1070 /* A function to convert machine dependent ELF section header flags to
1071 BFD internal section header flags. */
1072 bool (*elf_backend_section_flags
)
1073 (const Elf_Internal_Shdr
*);
1075 /* A function that returns a struct containing ELF section flags and
1076 type for the given BFD section. */
1077 const struct bfd_elf_special_section
* (*get_sec_type_attr
)
1078 (bfd
*, asection
*);
1080 /* A function to handle unusual program segment types when creating BFD
1081 sections from ELF program segments. */
1082 bool (*elf_backend_section_from_phdr
)
1083 (bfd
*, Elf_Internal_Phdr
*, int, const char *);
1085 /* A function to set up the ELF section header for a BFD section in
1086 preparation for writing it out. This is where the flags and type
1087 fields are set for unusual sections. */
1088 bool (*elf_backend_fake_sections
)
1089 (bfd
*, Elf_Internal_Shdr
*, asection
*);
1091 /* A function to get the ELF section index for a BFD section. If
1092 this returns TRUE, the section was found. If it is a normal ELF
1093 section, *RETVAL should be left unchanged. If it is not a normal
1094 ELF section *RETVAL should be set to the SHN_xxxx index. */
1095 bool (*elf_backend_section_from_bfd_section
)
1096 (bfd
*, asection
*, int *retval
);
1098 /* If this field is not NULL, it is called by the add_symbols phase
1099 of a link just before adding a symbol to the global linker hash
1100 table. It may modify any of the fields as it wishes. If *NAME
1101 is set to NULL, the symbol will be skipped rather than being
1102 added to the hash table. This function is responsible for
1103 handling all processor dependent symbol bindings and section
1104 indices, and must set at least *FLAGS and *SEC for each processor
1105 dependent case; failure to do so will cause a link error. */
1106 bool (*elf_add_symbol_hook
)
1107 (bfd
*abfd
, struct bfd_link_info
*info
, Elf_Internal_Sym
*,
1108 const char **name
, flagword
*flags
, asection
**sec
, bfd_vma
*value
);
1110 /* If this field is not NULL, it is called by the elf_link_output_sym
1111 phase of a link for each symbol which will appear in the object file.
1112 On error, this function returns 0. 1 is returned when the symbol
1113 should be output, 2 is returned when the symbol should be discarded. */
1114 int (*elf_backend_link_output_symbol_hook
)
1115 (struct bfd_link_info
*info
, const char *, Elf_Internal_Sym
*,
1116 asection
*, struct elf_link_hash_entry
*);
1118 /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend
1119 linker the first time it encounters a dynamic object in the link.
1120 This function must create any sections required for dynamic
1121 linking. The ABFD argument is a dynamic object. The .interp,
1122 .dynamic, .dynsym, .dynstr, and .hash functions have already been
1123 created, and this function may modify the section flags if
1124 desired. This function will normally create the .got and .plt
1125 sections, but different backends have different requirements. */
1126 bool (*elf_backend_create_dynamic_sections
)
1127 (bfd
*abfd
, struct bfd_link_info
*info
);
1129 /* When creating a shared library, determine whether to omit the
1130 dynamic symbol for the section. */
1131 bool (*elf_backend_omit_section_dynsym
)
1132 (bfd
*output_bfd
, struct bfd_link_info
*info
, asection
*osec
);
1134 /* Return TRUE if relocations of targets are compatible to the extent
1135 that CHECK_RELOCS will properly process them. PR 4424. */
1136 bool (*relocs_compatible
) (const bfd_target
*, const bfd_target
*);
1138 /* The CHECK_RELOCS function is called after all input files have been
1139 opened. It is called once for each section with relocs of an object
1140 file. The function must look through the relocs and do any special
1141 handling required. This generally means allocating space in the
1142 global offset table, and perhaps allocating space for a reloc. The
1143 relocs are always passed as Rela structures; if the section
1144 actually uses Rel structures, the r_addend field will always be
1146 bool (*check_relocs
)
1147 (bfd
*abfd
, struct bfd_link_info
*info
, asection
*o
,
1148 const Elf_Internal_Rela
*relocs
);
1150 /* The SIZE_RELATIVE_RELOCS function is called to size relative
1151 relocations when mappig sections to segments. */
1152 bool (*size_relative_relocs
)
1153 (struct bfd_link_info
*info
, bool *need_layout
);
1155 /* The FINISH_RELATIVE_RELOCS function is called to finish relative
1156 relocations in bfd_elf_final_link. */
1157 bool (*finish_relative_relocs
)
1158 (struct bfd_link_info
*info
);
1160 /* The CHECK_DIRECTIVES function is called once per input file by
1161 the add_symbols phase of the ELF backend linker. The function
1162 must inspect the bfd and create any additional symbols according
1163 to any custom directives in the bfd. */
1164 bool (*check_directives
)
1165 (bfd
*abfd
, struct bfd_link_info
*info
);
1167 /* The NOTICE_AS_NEEDED function is called as the linker is about to
1168 handle an as-needed lib (ACT = notice_as_needed), and after the
1169 linker has decided to keep the lib (ACT = notice_needed) or when
1170 the lib is not needed (ACT = notice_not_needed). */
1171 bool (*notice_as_needed
)
1172 (bfd
*abfd
, struct bfd_link_info
*info
, enum notice_asneeded_action act
);
1174 /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
1175 linker for every symbol which is defined by a dynamic object and
1176 referenced by a regular object. This is called after all the
1177 input files have been seen, but before the SIZE_DYNAMIC_SECTIONS
1178 function has been called. The hash table entry should be
1179 bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be
1180 defined in a section from a dynamic object. Dynamic object
1181 sections are not included in the final link, and this function is
1182 responsible for changing the value to something which the rest of
1183 the link can deal with. This will normally involve adding an
1184 entry to the .plt or .got or some such section, and setting the
1185 symbol to point to that. */
1186 bool (*elf_backend_adjust_dynamic_symbol
)
1187 (struct bfd_link_info
*info
, struct elf_link_hash_entry
*h
);
1189 /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker
1190 after all the linker input files have been seen but before the
1191 section sizes have been set. This is called after
1192 ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS. */
1193 bool (*elf_backend_always_size_sections
)
1194 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1196 /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend
1197 linker after all the linker input files have been seen but before
1198 the sections sizes have been set. This is called after
1199 ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols.
1200 It is only called when linking against a dynamic object. It must
1201 set the sizes of the dynamic sections, and may fill in their
1202 contents as well. The generic ELF linker can handle the .dynsym,
1203 .dynstr and .hash sections. This function must handle the
1204 .interp section and any sections created by the
1205 CREATE_DYNAMIC_SECTIONS entry point. */
1206 bool (*elf_backend_size_dynamic_sections
)
1207 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1209 /* The STRIP_ZERO_SIZED_DYNAMIC_SECTIONS function is called by the
1210 ELF backend linker to strip zero-sized dynamic sections after
1211 the section sizes have been set. */
1212 bool (*elf_backend_strip_zero_sized_dynamic_sections
)
1213 (struct bfd_link_info
*info
);
1215 /* Set TEXT_INDEX_SECTION and DATA_INDEX_SECTION, the output sections
1216 we keep to use as a base for relocs and symbols. */
1217 void (*elf_backend_init_index_section
)
1218 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1220 /* The RELOCATE_SECTION function is called by the ELF backend linker
1221 to handle the relocations for a section.
1223 The relocs are always passed as Rela structures; if the section
1224 actually uses Rel structures, the r_addend field will always be
1227 This function is responsible for adjust the section contents as
1228 necessary, and (if using Rela relocs and generating a
1229 relocatable output file) adjusting the reloc addend as
1232 This function does not have to worry about setting the reloc
1233 address or the reloc symbol index.
1235 LOCAL_SYMS is a pointer to the swapped in local symbols.
1237 LOCAL_SECTIONS is an array giving the section in the input file
1238 corresponding to the st_shndx field of each local symbol.
1240 The global hash table entry for the global symbols can be found
1241 via elf_sym_hashes (input_bfd).
1243 When generating relocatable output, this function must handle
1244 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
1245 going to be the section symbol corresponding to the output
1246 section, which means that the addend must be adjusted
1249 Returns FALSE on error, TRUE on success, 2 if successful and
1250 relocations should be written for this section. */
1251 int (*elf_backend_relocate_section
)
1252 (bfd
*output_bfd
, struct bfd_link_info
*info
, bfd
*input_bfd
,
1253 asection
*input_section
, bfd_byte
*contents
, Elf_Internal_Rela
*relocs
,
1254 Elf_Internal_Sym
*local_syms
, asection
**local_sections
);
1256 /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend
1257 linker just before it writes a symbol out to the .dynsym section.
1258 The processor backend may make any required adjustment to the
1259 symbol. It may also take the opportunity to set contents of the
1260 dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on
1261 all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called
1262 on those symbols which are defined by a dynamic object. */
1263 bool (*elf_backend_finish_dynamic_symbol
)
1264 (bfd
*output_bfd
, struct bfd_link_info
*info
,
1265 struct elf_link_hash_entry
*h
, Elf_Internal_Sym
*sym
);
1267 /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend
1268 linker just before it writes all the dynamic sections out to the
1269 output file. The FINISH_DYNAMIC_SYMBOL will have been called on
1270 all dynamic symbols. */
1271 bool (*elf_backend_finish_dynamic_sections
)
1272 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1274 /* A function to do any beginning processing needed for the ELF file
1275 before building the ELF headers and computing file positions. */
1276 void (*elf_backend_begin_write_processing
)
1277 (bfd
*, struct bfd_link_info
*);
1279 /* A function to do any final processing needed for the ELF file
1280 before writing it out. */
1281 bool (*elf_backend_final_write_processing
)
1284 /* This function is called by get_program_header_size. It should
1285 return the number of additional program segments which this BFD
1286 will need. It should return -1 on error. */
1287 int (*elf_backend_additional_program_headers
)
1288 (bfd
*, struct bfd_link_info
*);
1290 /* This function is called to modify an existing segment map in a
1291 backend specific fashion. */
1292 bool (*elf_backend_modify_segment_map
)
1293 (bfd
*, struct bfd_link_info
*);
1295 /* This function is called to modify program headers just before
1296 they are written. */
1297 bool (*elf_backend_modify_headers
)
1298 (bfd
*, struct bfd_link_info
*);
1300 /* This function is called to see if the PHDR header should be
1301 checked for validity. */
1302 bool (*elf_backend_allow_non_load_phdr
)
1303 (bfd
*, const Elf_Internal_Phdr
*, unsigned);
1305 /* This function is called before section garbage collection to
1306 mark entry symbol sections. */
1308 (struct bfd_link_info
*);
1310 /* This function is called during section garbage collection to
1311 mark sections that define global symbols. */
1312 bool (*gc_mark_dynamic_ref
)
1313 (struct elf_link_hash_entry
*, void *);
1315 /* This function is called during section gc to discover the section a
1316 particular relocation refers to. */
1317 elf_gc_mark_hook_fn gc_mark_hook
;
1319 /* This function, if defined, is called after the first gc marking pass
1320 to allow the backend to mark additional sections. */
1321 bool (*gc_mark_extra_sections
)
1322 (struct bfd_link_info
*, elf_gc_mark_hook_fn
);
1324 /* This function is called to initialise ELF file header info.
1325 Customised versions can modify things like the OS and ABI version. */
1326 bool (*elf_backend_init_file_header
)
1327 (bfd
*, struct bfd_link_info
*);
1329 /* This function, if defined, prints a symbol to file and returns the
1330 name of the symbol to be printed. It should return NULL to fall
1331 back to default symbol printing. */
1332 const char *(*elf_backend_print_symbol_all
)
1333 (bfd
*, void *, asymbol
*);
1335 /* This function, if defined, is called after all local symbols and
1336 global symbols converted to locals are emitted into the symtab
1337 section. It allows the backend to emit special local symbols
1338 not handled in the hash table. */
1339 bool (*elf_backend_output_arch_local_syms
)
1340 (bfd
*, struct bfd_link_info
*, void *,
1341 int (*) (void *, const char *, Elf_Internal_Sym
*, asection
*,
1342 struct elf_link_hash_entry
*));
1344 /* This function, if defined, is called after all symbols are emitted
1345 into the symtab section. It allows the backend to emit special
1346 global symbols not handled in the hash table. */
1347 bool (*elf_backend_output_arch_syms
)
1348 (bfd
*, struct bfd_link_info
*, void *,
1349 int (*) (void *, const char *, Elf_Internal_Sym
*, asection
*,
1350 struct elf_link_hash_entry
*));
1352 /* Filter what symbols of the output file to include in the import
1353 library if one is created. */
1354 unsigned int (*elf_backend_filter_implib_symbols
)
1355 (bfd
*, struct bfd_link_info
*, asymbol
**, long);
1357 /* Copy any information related to dynamic linking from a pre-existing
1358 symbol to a newly created symbol. Also called to copy flags and
1359 other back-end info to a weakdef, in which case the symbol is not
1360 newly created and plt/got refcounts and dynamic indices should not
1362 void (*elf_backend_copy_indirect_symbol
)
1363 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
1364 struct elf_link_hash_entry
*);
1366 /* Modify any information related to dynamic linking such that the
1367 symbol is not exported. */
1368 void (*elf_backend_hide_symbol
)
1369 (struct bfd_link_info
*, struct elf_link_hash_entry
*, bool);
1371 /* A function to do additional symbol fixup, called by
1372 _bfd_elf_fix_symbol_flags. */
1373 bool (*elf_backend_fixup_symbol
)
1374 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
1376 /* Merge the backend specific symbol attribute. */
1377 void (*elf_backend_merge_symbol_attribute
)
1378 (struct elf_link_hash_entry
*, unsigned int, bool, bool);
1380 /* This function, if defined, will return a string containing the
1381 name of a target-specific dynamic tag. */
1382 char *(*elf_backend_get_target_dtag
)
1385 /* Decide whether an undefined symbol is special and can be ignored.
1386 This is the case for OPTIONAL symbols on IRIX. */
1387 bool (*elf_backend_ignore_undef_symbol
)
1388 (struct elf_link_hash_entry
*);
1390 /* Emit relocations. Overrides default routine for emitting relocs,
1391 except during a relocatable link, or if all relocs are being emitted. */
1392 bool (*elf_backend_emit_relocs
)
1393 (bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*,
1394 struct elf_link_hash_entry
**);
1396 /* Update relocations. It is allowed to change the number and the order.
1397 In such a case hashes should be invalidated. */
1398 void (*elf_backend_update_relocs
)
1399 (asection
*, struct bfd_elf_section_reloc_data
*);
1401 /* Count relocations. Not called for relocatable links
1402 or if all relocs are being preserved in the output. */
1403 unsigned int (*elf_backend_count_relocs
)
1404 (struct bfd_link_info
*, asection
*);
1406 /* Count additionals relocations. Called for relocatable links if
1407 additional relocations needs to be created. */
1408 unsigned int (*elf_backend_count_additional_relocs
)
1411 /* Say whether to sort relocs output by ld -r and ld --emit-relocs,
1412 by r_offset. If NULL, default to true. */
1413 bool (*sort_relocs_p
)
1416 /* This function, if defined, is called when an NT_PRSTATUS note is found
1418 bool (*elf_backend_grok_prstatus
)
1419 (bfd
*, Elf_Internal_Note
*);
1421 /* This function, if defined, is called when an NT_PSINFO or NT_PRPSINFO
1422 note is found in a core file. */
1423 bool (*elf_backend_grok_psinfo
)
1424 (bfd
*, Elf_Internal_Note
*);
1426 /* This function, if defined, is called when a "FreeBSD" NT_PRSTATUS
1427 note is found in a core file. */
1428 bool (*elf_backend_grok_freebsd_prstatus
)
1429 (bfd
*, Elf_Internal_Note
*);
1431 /* This function, if defined, is called to write a note to a corefile. */
1432 char *(*elf_backend_write_core_note
)
1433 (bfd
*abfd
, char *buf
, int *bufsiz
, int note_type
, ...);
1435 /* This function, if defined, is called to convert target-specific
1436 section flag names into hex values. */
1437 flagword (*elf_backend_lookup_section_flags_hook
)
1440 /* This function returns class of a reloc type. */
1441 enum elf_reloc_type_class (*elf_backend_reloc_type_class
)
1442 (const struct bfd_link_info
*, const asection
*, const Elf_Internal_Rela
*);
1444 /* This function, if defined, removes information about discarded functions
1445 from other sections which mention them. */
1446 bool (*elf_backend_discard_info
)
1447 (bfd
*, struct elf_reloc_cookie
*, struct bfd_link_info
*);
1449 /* This function, if defined, signals that the function above has removed
1450 the discarded relocations for this section. */
1451 bool (*elf_backend_ignore_discarded_relocs
)
1454 /* What to do when ld finds relocations against symbols defined in
1455 discarded sections. */
1456 unsigned int (*action_discarded
)
1459 /* This function returns the width of FDE pointers in bytes, or 0 if
1460 that can't be determined for some reason. The default definition
1461 goes by the bfd's EI_CLASS. */
1462 unsigned int (*elf_backend_eh_frame_address_size
)
1463 (bfd
*, const asection
*);
1465 /* These functions tell elf-eh-frame whether to attempt to turn
1466 absolute or lsda encodings into pc-relative ones. The default
1467 definition enables these transformations. */
1468 bool (*elf_backend_can_make_relative_eh_frame
)
1469 (bfd
*, struct bfd_link_info
*, asection
*);
1470 bool (*elf_backend_can_make_lsda_relative_eh_frame
)
1471 (bfd
*, struct bfd_link_info
*, asection
*);
1473 /* Tell linker to support multiple eh_frame sections. */
1474 bool elf_backend_can_make_multiple_eh_frame
;
1476 /* This function returns an encoding after computing the encoded
1477 value (and storing it in ENCODED) for the given OFFSET into OSEC,
1478 to be stored in at LOC_OFFSET into the LOC_SEC input section.
1479 The default definition chooses a 32-bit PC-relative encoding. */
1480 bfd_byte (*elf_backend_encode_eh_address
)
1481 (bfd
*abfd
, struct bfd_link_info
*info
,
1482 asection
*osec
, bfd_vma offset
,
1483 asection
*loc_sec
, bfd_vma loc_offset
,
1486 /* This function, if defined, may write out the given section.
1487 Returns TRUE if it did so and FALSE if the caller should. */
1488 bool (*elf_backend_write_section
)
1489 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
1491 /* This function, if defined, returns TRUE if it is section symbols
1492 only that are considered local for the purpose of partitioning the
1493 symbol table into local and global symbols. This should be NULL
1494 for most targets, in which case the correct thing will be done.
1495 MIPS ELF, at least on the Irix 5, has special requirements. */
1496 bool (*elf_backend_elfsym_local_is_section
)
1499 /* The level of IRIX compatibility we're striving for.
1500 MIPS ELF specific function. */
1501 irix_compat_t (*elf_backend_mips_irix_compat
)
1504 reloc_howto_type
*(*elf_backend_mips_rtype_to_howto
)
1505 (bfd
*, unsigned int, bool);
1507 /* The swapping table to use when dealing with ECOFF information.
1508 Used for the MIPS ELF .mdebug section. */
1509 const struct ecoff_debug_swap
*elf_backend_ecoff_debug_swap
;
1511 /* This function implements `bfd_elf_bfd_from_remote_memory';
1512 see elf.c, elfcode.h. */
1513 bfd
*(*elf_backend_bfd_from_remote_memory
)
1514 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
1515 int (*target_read_memory
) (bfd_vma vma
, bfd_byte
*myaddr
,
1516 bfd_size_type len
));
1518 bool (*elf_backend_core_find_build_id
) (bfd
*, bfd_vma
);
1520 /* This function is used by `_bfd_elf_get_synthetic_symtab';
1522 bfd_vma (*plt_sym_val
) (bfd_vma
, const asection
*, const arelent
*);
1524 /* Is symbol defined in common section? */
1525 bool (*common_definition
) (Elf_Internal_Sym
*);
1527 /* Return a common section index for section. */
1528 unsigned int (*common_section_index
) (asection
*);
1530 /* Return a common section for section. */
1531 asection
*(*common_section
) (asection
*);
1533 /* Return TRUE if we can merge 2 definitions. */
1534 bool (*merge_symbol
) (struct elf_link_hash_entry
*,
1535 const Elf_Internal_Sym
*, asection
**,
1537 bfd
*, const asection
*);
1539 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
1540 bool (*elf_hash_symbol
) (struct elf_link_hash_entry
*);
1542 /* If non-NULL, called to register the location of XLAT_LOC within
1543 .MIPS.xhash at which real final dynindx for H will be written.
1544 If XLAT_LOC is zero, the symbol is not included in
1545 .MIPS.xhash and no dynindx will be written. */
1546 void (*record_xhash_symbol
)
1547 (struct elf_link_hash_entry
*h
, bfd_vma xlat_loc
);
1549 /* Return TRUE if type is a function symbol type. */
1550 bool (*is_function_type
) (unsigned int type
);
1552 /* If the ELF symbol SYM might be a function in SEC, return the
1553 function size and set *CODE_OFF to the function's entry point,
1554 otherwise return zero. */
1555 bfd_size_type (*maybe_function_sym
) (const asymbol
*sym
, asection
*sec
,
1558 /* Given NAME, the name of a relocation section stripped of its
1559 .rel/.rela prefix, return the section in ABFD to which the
1560 relocations apply. */
1561 asection
*(*get_reloc_section
) (bfd
*abfd
, const char *name
);
1563 /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
1564 has a type >= SHT_LOOS. Returns TRUE if the fields were initialised,
1565 FALSE otherwise. Can be called multiple times for a given section,
1566 until it returns TRUE. Most of the times it is called ISECTION will be
1567 set to an input section that might be associated with the output section.
1568 The last time that it is called, ISECTION will be set to NULL. */
1569 bool (*elf_backend_copy_special_section_fields
)
1570 (const bfd
*ibfd
, bfd
*obfd
, const Elf_Internal_Shdr
*isection
,
1571 Elf_Internal_Shdr
*osection
);
1573 /* Used to handle bad SHF_LINK_ORDER input. */
1574 void (*link_order_error_handler
) (const char *, ...);
1576 /* Name of the PLT relocation section. */
1577 const char *relplt_name
;
1579 /* Alternate EM_xxxx machine codes for this backend. */
1580 int elf_machine_alt1
;
1581 int elf_machine_alt2
;
1583 const struct elf_size_info
*s
;
1585 /* An array of target specific special sections. */
1586 const struct bfd_elf_special_section
*special_sections
;
1588 /* The size in bytes of the header for the GOT. This includes the
1589 so-called reserved entries on some systems. */
1590 bfd_vma got_header_size
;
1592 /* The size of the GOT entry for the symbol pointed to by H if non-NULL,
1593 otherwise by the local symbol with index SYMNDX in IBFD. */
1594 bfd_vma (*got_elt_size
) (bfd
*, struct bfd_link_info
*,
1595 struct elf_link_hash_entry
*h
,
1596 bfd
*ibfd
, unsigned long symndx
);
1598 /* The vendor name to use for a processor-standard attributes section. */
1599 const char *obj_attrs_vendor
;
1601 /* The section name to use for a processor-standard attributes section. */
1602 const char *obj_attrs_section
;
1604 /* Return 1, 2 or 3 to indicate what type of arguments a
1605 processor-specific tag takes. */
1606 int (*obj_attrs_arg_type
) (int);
1608 /* The section type to use for an attributes section. */
1609 unsigned int obj_attrs_section_type
;
1611 /* This function determines the order in which any attributes are
1612 written. It must be defined for input in the range
1613 LEAST_KNOWN_OBJ_ATTRIBUTE..NUM_KNOWN_OBJ_ATTRIBUTES-1 (this range
1614 is used in order to make unity easy). The returned value is the
1615 actual tag number to place in the input position. */
1616 int (*obj_attrs_order
) (int);
1618 /* Handle merging unknown attributes; either warn and return TRUE,
1619 or give an error and return FALSE. */
1620 bool (*obj_attrs_handle_unknown
) (bfd
*, int);
1622 /* Parse GNU properties. Return the property kind. If the property
1623 is corrupt, issue an error message and return property_corrupt. */
1624 enum elf_property_kind (*parse_gnu_properties
) (bfd
*, unsigned int,
1628 /* Merge GNU properties. Return TRUE if property is updated. */
1629 bool (*merge_gnu_properties
) (struct bfd_link_info
*, bfd
*, bfd
*,
1630 elf_property
*, elf_property
*);
1632 /* Set up GNU properties. */
1633 bfd
*(*setup_gnu_properties
) (struct bfd_link_info
*);
1635 /* Fix up GNU properties. */
1636 void (*fixup_gnu_properties
) (struct bfd_link_info
*,
1637 elf_property_list
**);
1639 /* Encoding used for compact EH tables. */
1640 int (*compact_eh_encoding
) (struct bfd_link_info
*);
1642 /* Opcode representing no unwind. */
1643 int (*cant_unwind_opcode
) (struct bfd_link_info
*);
1645 /* Called when emitting an ELF symbol whoes input version had an
1646 ST_SHNDX field set to a value in the range SHN_LOPROC..SHN_HIOS.
1647 Returns the value to be installed in the ST_SHNDX field of the
1648 emitted symbol. If not defined, the value is left unchanged. */
1649 unsigned int (*symbol_section_index
) (bfd
*, elf_symbol_type
*);
1651 /* Called when a section has extra reloc sections. */
1652 bool (*init_secondary_reloc_section
) (bfd
*, Elf_Internal_Shdr
*,
1653 const char *, unsigned int);
1655 /* Called when after loading the normal relocs for a section. */
1656 bool (*slurp_secondary_relocs
) (bfd
*, asection
*, asymbol
**, bool);
1658 /* Called after writing the normal relocs for a section. */
1659 bool (*write_secondary_relocs
) (bfd
*, asection
*);
1661 /* This is non-zero if static TLS segments require a special alignment. */
1662 unsigned static_tls_alignment
;
1664 /* Alignment for the PT_GNU_STACK segment. */
1665 unsigned stack_align
;
1667 /* Flag bits to assign to a section of type SHT_STRTAB. */
1668 unsigned long elf_strtab_flags
;
1670 /* This is TRUE if the linker should act like collect and gather
1671 global constructors and destructors by name. This is TRUE for
1672 MIPS ELF because the Irix 5 tools can not handle the .init
1674 unsigned collect
: 1;
1676 /* This is TRUE if the linker should ignore changes to the type of a
1677 symbol. This is TRUE for MIPS ELF because some Irix 5 objects
1678 record undefined functions as STT_OBJECT although the definitions
1680 unsigned type_change_ok
: 1;
1682 /* Whether the backend may use REL relocations. (Some backends use
1683 both REL and RELA relocations, and this flag is set for those
1685 unsigned may_use_rel_p
: 1;
1687 /* Whether the backend may use RELA relocations. (Some backends use
1688 both REL and RELA relocations, and this flag is set for those
1690 unsigned may_use_rela_p
: 1;
1692 /* Whether the default relocation type is RELA. If a backend with
1693 this flag set wants REL relocations for a particular section,
1694 it must note that explicitly. Similarly, if this flag is clear,
1695 and the backend wants RELA relocations for a particular
1697 unsigned default_use_rela_p
: 1;
1699 /* True if PLT and copy relocations should be RELA by default. */
1700 unsigned rela_plts_and_copies_p
: 1;
1702 /* Set if RELA relocations for a relocatable link can be handled by
1703 generic code. Backends that set this flag need do nothing in the
1704 backend relocate_section routine for relocatable linking. */
1705 unsigned rela_normal
: 1;
1707 /* Set if DT_REL/DT_RELA/DT_RELSZ/DT_RELASZ should not include PLT
1709 unsigned dtrel_excludes_plt
: 1;
1711 /* TRUE if addresses "naturally" sign extend. This is used when
1712 swapping in from Elf32 when BFD64. */
1713 unsigned sign_extend_vma
: 1;
1715 unsigned want_got_plt
: 1;
1716 unsigned plt_readonly
: 1;
1717 unsigned want_plt_sym
: 1;
1718 unsigned plt_not_loaded
: 1;
1719 unsigned plt_alignment
: 4;
1720 unsigned can_gc_sections
: 1;
1721 unsigned can_refcount
: 1;
1722 unsigned want_got_sym
: 1;
1723 unsigned want_dynbss
: 1;
1724 unsigned want_dynrelro
: 1;
1726 /* Targets which do not support physical addressing often require
1727 that the p_paddr field in the section header to be set to zero.
1728 This field indicates whether this behavior is required. */
1729 unsigned want_p_paddr_set_to_zero
: 1;
1731 /* Target has broken hardware and/or kernel that requires pages not
1732 to be mapped twice with different permissions. */
1733 unsigned no_page_alias
: 1;
1735 /* True if an object file lacking a .note.GNU-stack section
1736 should be assumed to be requesting exec stack. At least one
1737 other file in the link needs to have a .note.GNU-stack section
1738 for a PT_GNU_STACK segment to be created. */
1739 unsigned default_execstack
: 1;
1741 /* True if elf_section_data(sec)->this_hdr.contents is sec->rawsize
1742 in length rather than sec->size in length, if sec->rawsize is
1743 non-zero and smaller than sec->size. */
1744 unsigned caches_rawsize
: 1;
1746 /* Address of protected data defined in the shared library may be
1747 external, i.e., due to copy relocation. */
1748 unsigned extern_protected_data
: 1;
1750 /* True if `_bfd_elf_link_renumber_dynsyms' must be called even for
1752 unsigned always_renumber_dynsyms
: 1;
1754 /* True if the 32-bit Linux PRPSINFO structure's `pr_uid' and `pr_gid'
1755 members use a 16-bit data type. */
1756 unsigned linux_prpsinfo32_ugid16
: 1;
1758 /* True if the 64-bit Linux PRPSINFO structure's `pr_uid' and `pr_gid'
1759 members use a 16-bit data type. */
1760 unsigned linux_prpsinfo64_ugid16
: 1;
1763 /* Information about reloc sections associated with a bfd_elf_section_data
1765 struct bfd_elf_section_reloc_data
1767 /* The ELF header for the reloc section associated with this
1769 Elf_Internal_Shdr
*hdr
;
1770 /* The number of relocations currently assigned to HDR. */
1772 /* The ELF section number of the reloc section. Only used for an
1775 /* Used by the backend linker to store the symbol hash table entries
1776 associated with relocs against global symbols. */
1777 struct elf_link_hash_entry
**hashes
;
1780 /* Information stored for each BFD section in an ELF file. This
1781 structure is allocated by elf_new_section_hook. */
1783 struct bfd_elf_section_data
1785 /* The ELF header for this section. */
1786 Elf_Internal_Shdr this_hdr
;
1788 /* INPUT_SECTION_FLAGS if specified in the linker script. */
1789 struct flag_info
*section_flag_info
;
1791 /* Information about the REL and RELA reloc sections associated
1792 with this section, if any. */
1793 struct bfd_elf_section_reloc_data rel
, rela
;
1795 /* The ELF section number of this section. */
1798 /* Used by the backend linker when generating a shared library to
1799 record the dynamic symbol index for a section symbol
1800 corresponding to this section. A value of 0 means that there is
1801 no dynamic symbol for this section. */
1804 /* A pointer to the linked-to section for SHF_LINK_ORDER. */
1805 asection
*linked_to
;
1807 /* A pointer to the swapped relocs. If the section uses REL relocs,
1808 rather than RELA, all the r_addend fields will be zero. This
1809 pointer may be NULL. It is used by the backend linker. */
1810 Elf_Internal_Rela
*relocs
;
1812 /* A pointer to a linked list tracking dynamic relocs copied for
1816 /* A pointer to the bfd section used for dynamic relocs. */
1820 /* Group name, if this section is a member of a group. */
1823 /* Group signature sym, if this is the SHT_GROUP section. */
1824 struct bfd_symbol
*id
;
1827 /* For a member of a group, points to the SHT_GROUP section.
1828 NULL for the SHT_GROUP section itself and non-group sections. */
1829 asection
*sec_group
;
1831 /* A linked list of member sections in the group. Circular when used by
1832 the linker. For the SHT_GROUP section, points at first member. */
1833 asection
*next_in_group
;
1835 /* The FDEs associated with this section. The u.fde.next_in_section
1836 field acts as a chain pointer. */
1837 struct eh_cie_fde
*fde_list
;
1839 /* Link from a text section to its .eh_frame_entry section. */
1840 asection
*eh_frame_entry
;
1842 /* TRUE if the section has secondary reloc sections associated with it.
1843 FIXME: In the future it might be better to change this into a list
1844 of secondary reloc sections, making lookup easier and faster. */
1845 bool has_secondary_relocs
;
1847 /* A pointer used for various section optimizations. */
1851 #define elf_section_data(sec) ((struct bfd_elf_section_data*)(sec)->used_by_bfd)
1852 #define elf_linked_to_section(sec) (elf_section_data(sec)->linked_to)
1853 #define elf_section_type(sec) (elf_section_data(sec)->this_hdr.sh_type)
1854 #define elf_section_flags(sec) (elf_section_data(sec)->this_hdr.sh_flags)
1855 #define elf_section_info(sec) (elf_section_data(sec)->this_hdr.sh_info)
1856 #define elf_group_name(sec) (elf_section_data(sec)->group.name)
1857 #define elf_group_id(sec) (elf_section_data(sec)->group.id)
1858 #define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group)
1859 #define elf_fde_list(sec) (elf_section_data(sec)->fde_list)
1860 #define elf_sec_group(sec) (elf_section_data(sec)->sec_group)
1861 #define elf_section_eh_frame_entry(sec) (elf_section_data(sec)->eh_frame_entry)
1863 #define xvec_get_elf_backend_data(xvec) \
1864 ((const struct elf_backend_data *) (xvec)->backend_data)
1866 #define get_elf_backend_data(abfd) \
1867 xvec_get_elf_backend_data ((abfd)->xvec)
1869 /* The least object attributes (within an attributes subsection) known
1870 for any target. Some code assumes that the value 0 is not used and
1871 the field for that attribute can instead be used as a marker to
1872 indicate that attributes have been initialized. */
1873 #define LEAST_KNOWN_OBJ_ATTRIBUTE 2
1875 /* The maximum number of known object attributes for any target. */
1876 #define NUM_KNOWN_OBJ_ATTRIBUTES 77
1878 /* The value of an object attribute. The type indicates whether the attribute
1879 holds and integer, a string, or both. It can also indicate that there can
1880 be no default (i.e. all values must be written to file, even zero), or
1881 that the value is in error and should not be written to file. */
1883 typedef struct obj_attribute
1885 #define ATTR_TYPE_FLAG_INT_VAL (1 << 0)
1886 #define ATTR_TYPE_FLAG_STR_VAL (1 << 1)
1887 #define ATTR_TYPE_FLAG_NO_DEFAULT (1 << 2)
1888 #define ATTR_TYPE_FLAG_ERROR (1 << 3)
1890 #define ATTR_TYPE_HAS_INT_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_INT_VAL)
1891 #define ATTR_TYPE_HAS_STR_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_STR_VAL)
1892 #define ATTR_TYPE_HAS_NO_DEFAULT(TYPE) ((TYPE) & ATTR_TYPE_FLAG_NO_DEFAULT)
1893 #define ATTR_TYPE_HAS_ERROR(TYPE) ((TYPE) & ATTR_TYPE_FLAG_ERROR)
1900 typedef struct obj_attribute_list
1902 struct obj_attribute_list
*next
;
1905 } obj_attribute_list
;
1907 /* Object attributes may either be defined by the processor ABI, index
1908 OBJ_ATTR_PROC in the *_obj_attributes arrays, or be GNU-specific
1909 (and possibly also processor-specific), index OBJ_ATTR_GNU. */
1910 #define OBJ_ATTR_PROC 0
1911 #define OBJ_ATTR_GNU 1
1912 #define OBJ_ATTR_FIRST OBJ_ATTR_PROC
1913 #define OBJ_ATTR_LAST OBJ_ATTR_GNU
1915 /* The following object attribute tags are taken as generic, for all
1916 targets and for "gnu" where there is no target standard. */
1923 Tag_compatibility
= 32
1926 /* The following struct stores information about every SystemTap section
1927 found in the object file. */
1930 struct sdt_note
*next
;
1935 /* tdata information grabbed from an elf core file. */
1936 struct core_elf_obj_tdata
1945 /* Extra tdata information held for output ELF BFDs. */
1946 struct output_elf_obj_tdata
1948 struct elf_segment_map
*seg_map
;
1949 struct elf_strtab_hash
*strtab_ptr
;
1951 /* STT_SECTION symbols for each section */
1952 asymbol
**section_syms
;
1954 /* NT_GNU_BUILD_ID note type info. */
1957 bool (*after_write_object_contents
) (bfd
*);
1962 /* FDO_PACKAGING_METADATA note type info. */
1965 bool (*after_write_object_contents
) (bfd
*);
1970 /* Records the result of `get_program_header_size'. */
1971 bfd_size_type program_header_size
;
1973 /* Used when laying out sections. */
1974 file_ptr next_file_pos
;
1976 /* Linker information. */
1977 struct bfd_link_info
*link_info
;
1979 unsigned int num_section_syms
;
1980 unsigned int shstrtab_section
, strtab_section
;
1982 /* Segment flags for the PT_GNU_STACK segment. */
1983 unsigned int stack_flags
;
1985 /* Used to determine if PT_GNU_SFRAME segment header should be
1989 /* Used to determine if the e_flags field has been initialized */
1993 /* Indicate if the bfd contains SHF_GNU_MBIND/SHF_GNU_RETAIN sections or
1994 symbols that have the STT_GNU_IFUNC symbol type or STB_GNU_UNIQUE
1995 binding. Used to set the osabi field in the ELF header structure. */
1998 elf_gnu_osabi_mbind
= 1 << 0,
1999 elf_gnu_osabi_ifunc
= 1 << 1,
2000 elf_gnu_osabi_unique
= 1 << 2,
2001 elf_gnu_osabi_retain
= 1 << 3,
2004 typedef struct elf_section_list
2006 Elf_Internal_Shdr hdr
;
2008 struct elf_section_list
* next
;
2011 enum dynamic_lib_link_class
{
2015 DYN_NO_ADD_NEEDED
= 4,
2019 /* Some private data is stashed away for future use using the tdata pointer
2020 in the bfd structure. */
2022 struct elf_obj_tdata
2024 Elf_Internal_Ehdr elf_header
[1]; /* Actual data, but ref like ptr */
2025 Elf_Internal_Shdr
**elf_sect_ptr
;
2026 Elf_Internal_Phdr
*phdr
;
2027 Elf_Internal_Shdr symtab_hdr
;
2028 Elf_Internal_Shdr shstrtab_hdr
;
2029 Elf_Internal_Shdr strtab_hdr
;
2030 Elf_Internal_Shdr dynsymtab_hdr
;
2031 Elf_Internal_Shdr dynstrtab_hdr
;
2032 Elf_Internal_Shdr dynversym_hdr
;
2033 Elf_Internal_Shdr dynverref_hdr
;
2034 Elf_Internal_Shdr dynverdef_hdr
;
2035 Elf_Internal_Sym
*dt_symtab
;
2036 bfd_byte
*dt_versym
;
2037 bfd_byte
*dt_verdef
;
2038 bfd_byte
*dt_verneed
;
2039 size_t dt_symtab_count
;
2040 size_t dt_verdef_count
;
2041 size_t dt_verneed_count
;
2043 elf_section_list
* symtab_shndx_list
;
2044 bfd_vma gp
; /* The gp value */
2045 unsigned int gp_size
; /* The gp size */
2046 unsigned int num_elf_sections
; /* elf_sect_ptr size */
2047 unsigned char *being_created
;
2049 /* A mapping from external symbols to entries in the linker hash
2050 table, used when linking. This is indexed by the symbol index
2051 minus the sh_info field of the symbol table header. */
2052 struct elf_link_hash_entry
**sym_hashes
;
2054 /* Track usage and final offsets of GOT entries for local symbols.
2055 This array is indexed by symbol index. Elements are used
2056 identically to "got" in struct elf_link_hash_entry. */
2059 bfd_signed_vma
*refcounts
;
2061 struct got_entry
**ents
;
2064 /* The linker ELF emulation code needs to let the backend ELF linker
2065 know what filename should be used for a dynamic object if the
2066 dynamic object is found using a search. The emulation code then
2067 sometimes needs to know what name was actually used. Until the
2068 file has been added to the linker symbol table, this field holds
2069 the name the linker wants. After it has been added, it holds the
2070 name actually used, which will be the DT_SONAME entry if there is
2072 const char *dt_name
;
2074 /* The linker emulation needs to know what audit libs
2075 are used by a dynamic object. */
2076 const char *dt_audit
;
2078 /* Used by find_nearest_line entry point. */
2081 /* A place to stash dwarf1 info for this bfd. */
2082 void *dwarf1_find_line_info
;
2084 /* A place to stash dwarf2 info for this bfd. */
2085 void *dwarf2_find_line_info
;
2087 /* Stash away info for yet another find line/function variant. */
2088 void *elf_find_function_cache
;
2090 /* Number of symbol version definitions we are about to emit. */
2091 unsigned int cverdefs
;
2093 /* Number of symbol version references we are about to emit. */
2094 unsigned int cverrefs
;
2096 /* Symbol version definitions in external objects. */
2097 Elf_Internal_Verdef
*verdef
;
2099 /* Symbol version references to external objects. */
2100 Elf_Internal_Verneed
*verref
;
2102 /* A pointer to the .eh_frame section. */
2103 asection
*eh_frame_section
;
2105 /* Symbol buffer. */
2108 /* List of GNU properties. Will be updated by setup_gnu_properties
2109 after all input GNU properties are merged for output. */
2110 elf_property_list
*properties
;
2112 obj_attribute known_obj_attributes
[2][NUM_KNOWN_OBJ_ATTRIBUTES
];
2113 obj_attribute_list
*other_obj_attributes
[2];
2115 /* Linked-list containing information about every Systemtap section
2116 found in the object file. Each section corresponds to one entry
2118 struct sdt_note
*sdt_note_head
;
2120 Elf_Internal_Shdr
**group_sect_ptr
;
2121 unsigned int num_group
;
2123 /* Index into group_sect_ptr, updated by setup_group when finding a
2124 section's group. Used to optimize subsequent group searches. */
2125 unsigned int group_search_offset
;
2127 unsigned int symtab_section
, dynsymtab_section
;
2128 unsigned int dynversym_section
, dynverdef_section
, dynverref_section
;
2130 /* An identifier used to distinguish different target
2131 specific extensions to this structure. */
2132 ENUM_BITFIELD (elf_target_id
) object_id
: 6;
2134 /* Whether a dyanmic object was specified normally on the linker
2135 command line, or was specified when --as-needed was in effect,
2136 or was found via a DT_NEEDED entry. */
2137 ENUM_BITFIELD (dynamic_lib_link_class
) dyn_lib_class
: 4;
2139 /* Whether the bfd uses OS specific bits that require ELFOSABI_GNU. */
2140 ENUM_BITFIELD (elf_gnu_osabi
) has_gnu_osabi
: 4;
2142 /* Whether if the bfd contains the GNU_PROPERTY_NO_COPY_ON_PROTECTED
2144 unsigned int has_no_copy_on_protected
: 1;
2146 /* Whether if the bfd contains the
2147 GNU_PROPERTY_1_NEEDED_INDIRECT_EXTERN_ACCESS property. */
2148 unsigned int has_indirect_extern_access
: 1;
2150 /* Irix 5 often screws up the symbol table, sorting local symbols
2151 after global symbols. This flag is set if the symbol table in
2152 this BFD appears to be screwed up. If it is, we ignore the
2153 sh_info field in the symbol table header, and always read all the
2155 unsigned int bad_symtab
: 1;
2157 /* Set if DT_FLAGS_1 has DF_1_PIE set. */
2158 unsigned int is_pie
: 1;
2160 /* Information grabbed from an elf core file. */
2161 struct core_elf_obj_tdata
*core
;
2163 /* More information held for output ELF BFDs. */
2164 struct output_elf_obj_tdata
*o
;
2167 #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
2169 #define elf_object_id(bfd) (elf_tdata(bfd) -> object_id)
2170 #define elf_program_header_size(bfd) (elf_tdata(bfd) -> o->program_header_size)
2171 #define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header)
2172 #define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr)
2173 #define elf_numsections(bfd) (elf_tdata(bfd) -> num_elf_sections)
2174 #define elf_seg_map(bfd) (elf_tdata(bfd) -> o->seg_map)
2175 #define elf_link_info(bfd) (elf_tdata(bfd) -> o->link_info)
2176 #define elf_next_file_pos(bfd) (elf_tdata(bfd) -> o->next_file_pos)
2177 #define elf_stack_flags(bfd) (elf_tdata(bfd) -> o->stack_flags)
2178 #define elf_sframe(bfd) (elf_tdata(bfd) -> o->sframe)
2179 #define elf_shstrtab(bfd) (elf_tdata(bfd) -> o->strtab_ptr)
2180 #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section)
2181 #define elf_symtab_shndx_list(bfd) (elf_tdata(bfd) -> symtab_shndx_list)
2182 #define elf_strtab_sec(bfd) (elf_tdata(bfd) -> o->strtab_section)
2183 #define elf_shstrtab_sec(bfd) (elf_tdata(bfd) -> o->shstrtab_section)
2184 #define elf_symtab_hdr(bfd) (elf_tdata(bfd) -> symtab_hdr)
2185 #define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section)
2186 #define elf_dynversym(bfd) (elf_tdata(bfd) -> dynversym_section)
2187 #define elf_dynverdef(bfd) (elf_tdata(bfd) -> dynverdef_section)
2188 #define elf_dynverref(bfd) (elf_tdata(bfd) -> dynverref_section)
2189 #define elf_eh_frame_section(bfd) \
2190 (elf_tdata(bfd) -> eh_frame_section)
2191 #define elf_section_syms(bfd) (elf_tdata(bfd) -> o->section_syms)
2192 #define elf_num_section_syms(bfd) (elf_tdata(bfd) -> o->num_section_syms)
2193 #define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
2194 #define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
2195 #define elf_gp(bfd) (elf_tdata(bfd) -> gp)
2196 #define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size)
2197 #define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes)
2198 #define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts)
2199 #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets)
2200 #define elf_local_got_ents(bfd) (elf_tdata(bfd) -> local_got.ents)
2201 #define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name)
2202 #define elf_dt_audit(bfd) (elf_tdata(bfd) -> dt_audit)
2203 #define elf_dyn_lib_class(bfd) (elf_tdata(bfd) -> dyn_lib_class)
2204 #define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab)
2205 #define elf_flags_init(bfd) (elf_tdata(bfd) -> o->flags_init)
2206 #define elf_use_dt_symtab_p(bfd) (elf_tdata(bfd) -> dt_symtab_count != 0)
2207 #define elf_known_obj_attributes(bfd) (elf_tdata (bfd) -> known_obj_attributes)
2208 #define elf_other_obj_attributes(bfd) (elf_tdata (bfd) -> other_obj_attributes)
2209 #define elf_known_obj_attributes_proc(bfd) \
2210 (elf_known_obj_attributes (bfd) [OBJ_ATTR_PROC])
2211 #define elf_other_obj_attributes_proc(bfd) \
2212 (elf_other_obj_attributes (bfd) [OBJ_ATTR_PROC])
2213 #define elf_properties(bfd) (elf_tdata (bfd) -> properties)
2214 #define elf_has_no_copy_on_protected(bfd) \
2215 (elf_tdata(bfd) -> has_no_copy_on_protected)
2216 #define elf_has_indirect_extern_access(bfd) \
2217 (elf_tdata(bfd) -> has_indirect_extern_access)
2219 extern void _bfd_elf_swap_verdef_in
2220 (bfd
*, const Elf_External_Verdef
*, Elf_Internal_Verdef
*);
2221 extern void _bfd_elf_swap_verdef_out
2222 (bfd
*, const Elf_Internal_Verdef
*, Elf_External_Verdef
*);
2223 extern void _bfd_elf_swap_verdaux_in
2224 (bfd
*, const Elf_External_Verdaux
*, Elf_Internal_Verdaux
*);
2225 extern void _bfd_elf_swap_verdaux_out
2226 (bfd
*, const Elf_Internal_Verdaux
*, Elf_External_Verdaux
*);
2227 extern void _bfd_elf_swap_verneed_in
2228 (bfd
*, const Elf_External_Verneed
*, Elf_Internal_Verneed
*);
2229 extern void _bfd_elf_swap_verneed_out
2230 (bfd
*, const Elf_Internal_Verneed
*, Elf_External_Verneed
*);
2231 extern void _bfd_elf_swap_vernaux_in
2232 (bfd
*, const Elf_External_Vernaux
*, Elf_Internal_Vernaux
*);
2233 extern void _bfd_elf_swap_vernaux_out
2234 (bfd
*, const Elf_Internal_Vernaux
*, Elf_External_Vernaux
*);
2235 extern void _bfd_elf_swap_versym_in
2236 (bfd
*, const Elf_External_Versym
*, Elf_Internal_Versym
*);
2237 extern void _bfd_elf_swap_versym_out
2238 (bfd
*, const Elf_Internal_Versym
*, Elf_External_Versym
*);
2240 extern unsigned int _bfd_elf_section_from_bfd_section
2241 (bfd
*, asection
*);
2242 extern char *bfd_elf_string_from_elf_section
2243 (bfd
*, unsigned, unsigned);
2244 extern Elf_Internal_Sym
*bfd_elf_get_elf_syms
2245 (bfd
*, Elf_Internal_Shdr
*, size_t, size_t, Elf_Internal_Sym
*, void *,
2246 Elf_External_Sym_Shndx
*);
2247 extern char * bfd_elf_get_str_section (bfd
*, unsigned int);
2248 extern const char *bfd_elf_sym_name
2249 (bfd
*, Elf_Internal_Shdr
*, Elf_Internal_Sym
*, asection
*);
2251 extern bool _bfd_elf_copy_private_bfd_data
2253 extern bool _bfd_elf_print_private_bfd_data
2255 const char * _bfd_elf_get_symbol_version_string
2256 (bfd
*, asymbol
*, bool, bool *);
2257 extern void bfd_elf_print_symbol
2258 (bfd
*, void *, asymbol
*, bfd_print_symbol_type
);
2260 extern unsigned int _bfd_elf_eh_frame_address_size
2261 (bfd
*, const asection
*);
2262 extern bfd_byte _bfd_elf_encode_eh_address
2263 (bfd
*abfd
, struct bfd_link_info
*info
, asection
*osec
, bfd_vma offset
,
2264 asection
*loc_sec
, bfd_vma loc_offset
, bfd_vma
*encoded
);
2265 extern bool _bfd_elf_can_make_relative
2266 (bfd
*input_bfd
, struct bfd_link_info
*info
, asection
*eh_frame_section
);
2268 extern enum elf_reloc_type_class _bfd_elf_reloc_type_class
2269 (const struct bfd_link_info
*, const asection
*,
2270 const Elf_Internal_Rela
*);
2271 extern bfd_vma _bfd_elf_rela_local_sym
2272 (bfd
*, Elf_Internal_Sym
*, asection
**, Elf_Internal_Rela
*);
2273 extern bfd_vma _bfd_elf_rel_local_sym
2274 (bfd
*, Elf_Internal_Sym
*, asection
**, bfd_vma
);
2275 extern bfd_vma _bfd_elf_section_offset
2276 (bfd
*, struct bfd_link_info
*, asection
*, bfd_vma
);
2278 extern unsigned long bfd_elf_hash
2280 extern unsigned long bfd_elf_gnu_hash
2283 extern bfd_reloc_status_type bfd_elf_generic_reloc
2284 (bfd
*, arelent
*, asymbol
*, void *, asection
*, bfd
*, char **);
2285 extern bool bfd_elf_allocate_object
2286 (bfd
*, size_t, enum elf_target_id
);
2287 extern bool bfd_elf_make_object
2289 extern bool bfd_elf_mkcorefile
2291 extern bool _bfd_elf_make_section_from_shdr
2292 (bfd
*, Elf_Internal_Shdr
*, const char *, int);
2293 extern bool _bfd_elf_make_section_from_phdr
2294 (bfd
*, Elf_Internal_Phdr
*, int, const char *);
2295 extern struct bfd_hash_entry
*_bfd_elf_link_hash_newfunc
2296 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *);
2297 extern struct bfd_link_hash_table
*_bfd_elf_link_hash_table_create
2299 extern void _bfd_elf_link_hash_table_free
2301 extern void _bfd_elf_link_hash_copy_indirect
2302 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
2303 struct elf_link_hash_entry
*);
2304 extern void _bfd_elf_link_hash_hide_symbol
2305 (struct bfd_link_info
*, struct elf_link_hash_entry
*, bool);
2306 extern void _bfd_elf_link_hide_symbol
2307 (bfd
*, struct bfd_link_info
*, struct bfd_link_hash_entry
*);
2308 extern bool _bfd_elf_link_hash_fixup_symbol
2309 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
2310 extern bool _bfd_elf_link_hash_table_init
2311 (struct elf_link_hash_table
*, bfd
*,
2312 struct bfd_hash_entry
*(*)
2313 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *),
2314 unsigned int, enum elf_target_id
);
2315 extern bool _bfd_elf_slurp_version_tables
2317 extern bool _bfd_elf_merge_sections
2318 (bfd
*, struct bfd_link_info
*);
2319 extern bool _bfd_elf_match_sections_by_type
2320 (bfd
*, const asection
*, bfd
*, const asection
*);
2321 extern bool bfd_elf_is_group_section
2322 (bfd
*, const struct bfd_section
*);
2323 extern const char *bfd_elf_group_name
2324 (bfd
*, const struct bfd_section
*);
2325 extern bool _bfd_elf_section_already_linked
2326 (bfd
*, asection
*, struct bfd_link_info
*);
2327 extern void bfd_elf_set_group_contents
2328 (bfd
*, asection
*, void *);
2329 extern unsigned int _bfd_elf_filter_global_symbols
2330 (bfd
*, struct bfd_link_info
*, asymbol
**, long);
2331 extern asection
*_bfd_elf_check_kept_section
2332 (asection
*, struct bfd_link_info
*);
2333 #define _bfd_elf_link_just_syms _bfd_generic_link_just_syms
2334 extern void _bfd_elf_copy_link_hash_symbol_type
2335 (bfd
*, struct bfd_link_hash_entry
*, struct bfd_link_hash_entry
*);
2336 extern bool _bfd_elf_size_group_sections
2337 (struct bfd_link_info
*);
2338 extern bool _bfd_elf_fixup_group_sections
2339 (bfd
*, asection
*);
2340 extern bool _bfd_elf_copy_private_header_data
2342 extern bool _bfd_elf_copy_private_symbol_data
2343 (bfd
*, asymbol
*, bfd
*, asymbol
*);
2344 #define _bfd_generic_init_private_section_data \
2345 _bfd_elf_init_private_section_data
2346 extern bool _bfd_elf_init_private_section_data
2347 (bfd
*, asection
*, bfd
*, asection
*, struct bfd_link_info
*);
2348 extern bool _bfd_elf_copy_private_section_data
2349 (bfd
*, asection
*, bfd
*, asection
*);
2350 extern bool _bfd_elf_write_object_contents
2352 extern bool _bfd_elf_write_corefile_contents
2354 extern bool _bfd_elf_set_section_contents
2355 (bfd
*, sec_ptr
, const void *, file_ptr
, bfd_size_type
);
2356 extern long _bfd_elf_get_symtab_upper_bound
2358 extern long _bfd_elf_canonicalize_symtab
2359 (bfd
*, asymbol
**);
2360 extern long _bfd_elf_get_dynamic_symtab_upper_bound
2362 extern long _bfd_elf_canonicalize_dynamic_symtab
2363 (bfd
*, asymbol
**);
2364 extern long _bfd_elf_get_synthetic_symtab
2365 (bfd
*, long, asymbol
**, long, asymbol
**, asymbol
**);
2366 extern long _bfd_elf_get_reloc_upper_bound
2368 extern long _bfd_elf_canonicalize_reloc
2369 (bfd
*, sec_ptr
, arelent
**, asymbol
**);
2370 extern asection
* _bfd_elf_get_dynamic_reloc_section
2371 (bfd
*, asection
*, bool);
2372 extern asection
* _bfd_elf_make_dynamic_reloc_section
2373 (asection
*, bfd
*, unsigned int, bfd
*, bool);
2374 extern long _bfd_elf_get_dynamic_reloc_upper_bound
2376 extern long _bfd_elf_canonicalize_dynamic_reloc
2377 (bfd
*, arelent
**, asymbol
**);
2378 extern asymbol
*_bfd_elf_make_empty_symbol
2380 extern void _bfd_elf_get_symbol_info
2381 (bfd
*, asymbol
*, symbol_info
*);
2382 extern bool _bfd_elf_is_local_label_name
2383 (bfd
*, const char *);
2384 extern alent
*_bfd_elf_get_lineno
2386 extern bool _bfd_elf_set_arch_mach
2387 (bfd
*, enum bfd_architecture
, unsigned long);
2388 extern bool _bfd_elf_find_nearest_line
2389 (bfd
*, asymbol
**, asection
*, bfd_vma
,
2390 const char **, const char **, unsigned int *, unsigned int *);
2391 extern bool _bfd_elf_find_nearest_line_with_alt
2392 (bfd
*, const char *, asymbol
**, asection
*, bfd_vma
,
2393 const char **, const char **, unsigned int *, unsigned int *);
2394 extern bool _bfd_elf_find_line
2395 (bfd
*, asymbol
**, asymbol
*, const char **, unsigned int *);
2396 extern bool _bfd_elf_find_inliner_info
2397 (bfd
*, const char **, const char **, unsigned int *);
2398 extern asymbol
*_bfd_elf_find_function
2399 (bfd
*, asymbol
**, asection
*, bfd_vma
, const char **, const char **);
2400 #define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols
2401 #define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
2402 extern int _bfd_elf_sizeof_headers
2403 (bfd
*, struct bfd_link_info
*);
2404 extern bool _bfd_elf_new_section_hook
2405 (bfd
*, asection
*);
2406 extern const struct bfd_elf_special_section
*_bfd_elf_get_special_section
2407 (const char *, const struct bfd_elf_special_section
*, unsigned int);
2408 extern const struct bfd_elf_special_section
*_bfd_elf_get_sec_type_attr
2409 (bfd
*, asection
*);
2411 extern bool _bfd_elf_link_hide_sym_by_version
2412 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
2414 /* If the target doesn't have reloc handling written yet: */
2415 extern bool _bfd_elf_no_info_to_howto
2416 (bfd
*, arelent
*, Elf_Internal_Rela
*);
2418 extern bool bfd_section_from_shdr
2419 (bfd
*, unsigned int shindex
);
2420 extern bool bfd_section_from_phdr
2421 (bfd
*, Elf_Internal_Phdr
*, int);
2423 extern int _bfd_elf_symbol_from_bfd_symbol
2424 (bfd
*, asymbol
**);
2426 extern Elf_Internal_Sym
*bfd_sym_from_r_symndx
2427 (struct sym_cache
*, bfd
*, unsigned long);
2428 extern asection
*bfd_section_from_elf_index
2429 (bfd
*, unsigned int);
2431 extern struct elf_strtab_hash
* _bfd_elf_strtab_init
2433 extern void _bfd_elf_strtab_free
2434 (struct elf_strtab_hash
*);
2435 extern size_t _bfd_elf_strtab_add
2436 (struct elf_strtab_hash
*, const char *, bool);
2437 extern void _bfd_elf_strtab_addref
2438 (struct elf_strtab_hash
*, size_t);
2439 extern void _bfd_elf_strtab_delref
2440 (struct elf_strtab_hash
*, size_t);
2441 extern unsigned int _bfd_elf_strtab_refcount
2442 (struct elf_strtab_hash
*, size_t);
2443 extern void _bfd_elf_strtab_clear_all_refs
2444 (struct elf_strtab_hash
*);
2445 extern void *_bfd_elf_strtab_save
2446 (struct elf_strtab_hash
*);
2447 extern void _bfd_elf_strtab_restore
2448 (struct elf_strtab_hash
*, void *);
2449 extern bfd_size_type _bfd_elf_strtab_size
2450 (struct elf_strtab_hash
*);
2451 extern bfd_size_type _bfd_elf_strtab_len
2452 (struct elf_strtab_hash
*);
2453 extern bfd_size_type _bfd_elf_strtab_offset
2454 (struct elf_strtab_hash
*, size_t);
2455 extern const char * _bfd_elf_strtab_str
2456 (struct elf_strtab_hash
*, size_t idx
, bfd_size_type
*offset
);
2457 extern bool _bfd_elf_strtab_emit
2458 (bfd
*, struct elf_strtab_hash
*);
2459 extern void _bfd_elf_strtab_finalize
2460 (struct elf_strtab_hash
*);
2462 extern bool bfd_elf_parse_eh_frame_entries
2463 (bfd
*, struct bfd_link_info
*);
2464 extern bool _bfd_elf_parse_eh_frame_entry
2465 (struct bfd_link_info
*, asection
*, struct elf_reloc_cookie
*);
2466 extern void _bfd_elf_parse_eh_frame
2467 (bfd
*, struct bfd_link_info
*, asection
*, struct elf_reloc_cookie
*);
2468 extern bool _bfd_elf_end_eh_frame_parsing
2469 (struct bfd_link_info
*info
);
2471 extern bool _bfd_elf_discard_section_eh_frame
2472 (bfd
*, struct bfd_link_info
*, asection
*,
2473 bool (*) (bfd_vma
, void *), struct elf_reloc_cookie
*);
2474 extern bool _bfd_elf_adjust_eh_frame_global_symbol
2475 (struct elf_link_hash_entry
*, void *);
2476 extern bool _bfd_elf_discard_section_eh_frame_hdr
2477 (struct bfd_link_info
*);
2478 extern bfd_vma _bfd_elf_eh_frame_section_offset
2479 (bfd
*, struct bfd_link_info
*, asection
*, bfd_vma
);
2480 extern bool _bfd_elf_write_section_eh_frame
2481 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
2482 bool _bfd_elf_write_section_eh_frame_entry
2483 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
2484 extern bool _bfd_elf_fixup_eh_frame_hdr (struct bfd_link_info
*);
2485 extern bool _bfd_elf_write_section_eh_frame_hdr
2486 (bfd
*, struct bfd_link_info
*);
2487 extern bool _bfd_elf_eh_frame_present
2488 (struct bfd_link_info
*);
2489 extern bool _bfd_elf_eh_frame_entry_present
2490 (struct bfd_link_info
*);
2491 extern bool _bfd_elf_maybe_strip_eh_frame_hdr
2492 (struct bfd_link_info
*);
2494 extern bool _bfd_elf_sframe_present
2495 (struct bfd_link_info
*);
2496 extern bool _bfd_elf_parse_sframe
2497 (bfd
*, struct bfd_link_info
*, asection
*, struct elf_reloc_cookie
*);
2498 extern bool _bfd_elf_discard_section_sframe
2499 (asection
*, bool (*) (bfd_vma
, void *), struct elf_reloc_cookie
*);
2500 extern bool _bfd_elf_merge_section_sframe
2501 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
2502 extern bool _bfd_elf_write_section_sframe
2503 (bfd
*, struct bfd_link_info
*);
2504 extern bool _bfd_elf_set_section_sframe (bfd
*, struct bfd_link_info
*);
2506 extern bool _bfd_elf_hash_symbol (struct elf_link_hash_entry
*);
2508 extern long _bfd_elf_link_lookup_local_dynindx
2509 (struct bfd_link_info
*, bfd
*, long);
2510 extern bool _bfd_elf_compute_section_file_positions
2511 (bfd
*, struct bfd_link_info
*);
2512 extern file_ptr _bfd_elf_assign_file_position_for_section
2513 (Elf_Internal_Shdr
*, file_ptr
, bool);
2514 extern bool _bfd_elf_modify_headers
2515 (bfd
*, struct bfd_link_info
*);
2517 extern bool _bfd_elf_validate_reloc
2520 extern bool bfd_elf_record_link_assignment
2521 (bfd
*, struct bfd_link_info
*, const char *, bool,
2523 extern bool bfd_elf_stack_segment_size (bfd
*, struct bfd_link_info
*,
2524 const char *, bfd_vma
);
2525 extern bool bfd_elf_size_dynamic_sections
2526 (bfd
*, const char *, const char *, const char *, const char *, const char *,
2527 const char * const *, struct bfd_link_info
*, struct bfd_section
**);
2528 extern bool bfd_elf_size_dynsym_hash_dynstr
2529 (bfd
*, struct bfd_link_info
*);
2530 extern bool bfd_elf_get_bfd_needed_list
2531 (bfd
*, struct bfd_link_needed_list
**);
2532 extern struct bfd_link_needed_list
*bfd_elf_get_needed_list
2533 (bfd
*, struct bfd_link_info
*);
2534 extern void bfd_elf_set_dt_needed_name
2535 (bfd
*, const char *);
2536 extern const char *bfd_elf_get_dt_soname
2538 extern void bfd_elf_set_dyn_lib_class
2539 (bfd
*, enum dynamic_lib_link_class
);
2540 extern int bfd_elf_get_dyn_lib_class
2542 extern struct bfd_link_needed_list
*bfd_elf_get_runpath_list
2543 (bfd
*, struct bfd_link_info
*);
2544 extern int bfd_elf_discard_info
2545 (bfd
*, struct bfd_link_info
*);
2546 extern unsigned int _bfd_elf_default_action_discarded
2547 (struct bfd_section
*);
2548 extern struct bfd_section
*_bfd_elf_tls_setup
2549 (bfd
*, struct bfd_link_info
*);
2551 extern bool _bfd_elf_link_create_dynamic_sections
2552 (bfd
*, struct bfd_link_info
*);
2553 extern bool _bfd_elf_omit_section_dynsym_default
2554 (bfd
*, struct bfd_link_info
*, asection
*);
2555 extern bool _bfd_elf_omit_section_dynsym_all
2556 (bfd
*, struct bfd_link_info
*, asection
*);
2557 extern bool _bfd_elf_create_dynamic_sections
2558 (bfd
*, struct bfd_link_info
*);
2559 extern bool _bfd_elf_create_got_section
2560 (bfd
*, struct bfd_link_info
*);
2561 extern asection
*_bfd_elf_section_for_symbol
2562 (struct elf_reloc_cookie
*, unsigned long, bool);
2563 extern struct elf_link_hash_entry
*_bfd_elf_define_linkage_sym
2564 (bfd
*, struct bfd_link_info
*, asection
*, const char *);
2565 extern void _bfd_elf_init_1_index_section
2566 (bfd
*, struct bfd_link_info
*);
2567 extern void _bfd_elf_init_2_index_sections
2568 (bfd
*, struct bfd_link_info
*);
2570 extern bool _bfd_elfcore_make_pseudosection
2571 (bfd
*, char *, size_t, ufile_ptr
);
2572 extern char *_bfd_elfcore_strndup
2573 (bfd
*, char *, size_t);
2575 extern Elf_Internal_Rela
*_bfd_elf_link_read_relocs
2576 (bfd
*, asection
*, void *, Elf_Internal_Rela
*, bool);
2577 extern Elf_Internal_Rela
*_bfd_elf_link_info_read_relocs
2578 (bfd
*, struct bfd_link_info
*, asection
*, void *, Elf_Internal_Rela
*,
2581 extern bool _bfd_elf_link_output_relocs
2582 (bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*,
2583 struct elf_link_hash_entry
**);
2585 extern bool _bfd_elf_adjust_dynamic_copy
2586 (struct bfd_link_info
*, struct elf_link_hash_entry
*, asection
*);
2588 extern bool _bfd_elf_dynamic_symbol_p
2589 (struct elf_link_hash_entry
*, struct bfd_link_info
*, bool);
2591 extern bool _bfd_elf_symbol_refs_local_p
2592 (struct elf_link_hash_entry
*, struct bfd_link_info
*, bool);
2594 extern bfd_reloc_status_type bfd_elf_perform_complex_relocation
2595 (bfd
*, asection
*, bfd_byte
*, Elf_Internal_Rela
*, bfd_vma
);
2597 extern bool _bfd_elf_setup_sections
2600 extern bool _bfd_elf_get_dynamic_symbols
2601 (bfd
*, Elf_Internal_Phdr
*, Elf_Internal_Phdr
*, size_t,
2603 extern asection
*_bfd_elf_get_section_from_dynamic_symbol
2604 (bfd
*, Elf_Internal_Sym
*);
2606 extern struct bfd_link_hash_entry
*bfd_elf_define_start_stop
2607 (struct bfd_link_info
*, const char *, asection
*);
2609 extern bool _bfd_elf_init_file_header (bfd
*, struct bfd_link_info
*);
2611 extern bool _bfd_elf_final_write_processing (bfd
*);
2613 extern bfd_cleanup bfd_elf32_object_p
2615 extern bfd_cleanup bfd_elf32_core_file_p
2617 extern char *bfd_elf32_core_file_failing_command
2619 extern int bfd_elf32_core_file_failing_signal
2621 extern bool bfd_elf32_core_file_matches_executable_p
2623 extern int bfd_elf32_core_file_pid
2625 extern bool _bfd_elf32_core_find_build_id
2628 extern bool bfd_elf32_swap_symbol_in
2629 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
2630 extern void bfd_elf32_swap_symbol_out
2631 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
2632 extern void bfd_elf32_swap_reloc_in
2633 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2634 extern void bfd_elf32_swap_reloc_out
2635 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2636 extern void bfd_elf32_swap_reloca_in
2637 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2638 extern void bfd_elf32_swap_reloca_out
2639 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2640 extern void bfd_elf32_swap_phdr_in
2641 (bfd
*, const Elf32_External_Phdr
*, Elf_Internal_Phdr
*);
2642 extern void bfd_elf32_swap_phdr_out
2643 (bfd
*, const Elf_Internal_Phdr
*, Elf32_External_Phdr
*);
2644 extern void bfd_elf32_swap_dyn_in
2645 (bfd
*, const void *, Elf_Internal_Dyn
*);
2646 extern void bfd_elf32_swap_dyn_out
2647 (bfd
*, const Elf_Internal_Dyn
*, void *);
2648 extern long bfd_elf32_slurp_symbol_table
2649 (bfd
*, asymbol
**, bool);
2650 extern bool bfd_elf32_write_shdrs_and_ehdr
2652 extern int bfd_elf32_write_out_phdrs
2653 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
2654 extern bool bfd_elf32_checksum_contents
2655 (bfd
* , void (*) (const void *, size_t, void *), void *);
2656 extern void bfd_elf32_write_relocs
2657 (bfd
*, asection
*, void *);
2658 extern bool bfd_elf32_slurp_reloc_table
2659 (bfd
*, asection
*, asymbol
**, bool);
2661 extern bfd_cleanup bfd_elf64_object_p
2663 extern bfd_cleanup bfd_elf64_core_file_p
2665 extern char *bfd_elf64_core_file_failing_command
2667 extern int bfd_elf64_core_file_failing_signal
2669 extern bool bfd_elf64_core_file_matches_executable_p
2671 extern int bfd_elf64_core_file_pid
2673 extern bool _bfd_elf64_core_find_build_id
2676 extern bool bfd_elf64_swap_symbol_in
2677 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
2678 extern void bfd_elf64_swap_symbol_out
2679 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
2680 extern void bfd_elf64_swap_reloc_in
2681 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2682 extern void bfd_elf64_swap_reloc_out
2683 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2684 extern void bfd_elf64_swap_reloca_in
2685 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2686 extern void bfd_elf64_swap_reloca_out
2687 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2688 extern void bfd_elf64_swap_phdr_in
2689 (bfd
*, const Elf64_External_Phdr
*, Elf_Internal_Phdr
*);
2690 extern void bfd_elf64_swap_phdr_out
2691 (bfd
*, const Elf_Internal_Phdr
*, Elf64_External_Phdr
*);
2692 extern void bfd_elf64_swap_dyn_in
2693 (bfd
*, const void *, Elf_Internal_Dyn
*);
2694 extern void bfd_elf64_swap_dyn_out
2695 (bfd
*, const Elf_Internal_Dyn
*, void *);
2696 extern long bfd_elf64_slurp_symbol_table
2697 (bfd
*, asymbol
**, bool);
2698 extern bool bfd_elf64_write_shdrs_and_ehdr
2700 extern int bfd_elf64_write_out_phdrs
2701 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
2702 extern bool bfd_elf64_checksum_contents
2703 (bfd
* , void (*) (const void *, size_t, void *), void *);
2704 extern void bfd_elf64_write_relocs
2705 (bfd
*, asection
*, void *);
2706 extern bool bfd_elf64_slurp_reloc_table
2707 (bfd
*, asection
*, asymbol
**, bool);
2709 extern bool _bfd_elf_default_relocs_compatible
2710 (const bfd_target
*, const bfd_target
*);
2712 extern bool _bfd_elf_relocs_compatible
2713 (const bfd_target
*, const bfd_target
*);
2714 extern bool _bfd_elf_notice_as_needed
2715 (bfd
*, struct bfd_link_info
*, enum notice_asneeded_action
);
2717 extern struct bfd_link_hash_entry
*_bfd_elf_archive_symbol_lookup
2718 (bfd
*, struct bfd_link_info
*, const char *);
2719 extern bool bfd_elf_link_add_symbols
2720 (bfd
*, struct bfd_link_info
*);
2721 extern bool _bfd_elf_add_dynamic_entry
2722 (struct bfd_link_info
*, bfd_vma
, bfd_vma
);
2723 extern bool _bfd_elf_strip_zero_sized_dynamic_sections
2724 (struct bfd_link_info
*);
2725 extern int bfd_elf_add_dt_needed_tag
2726 (bfd
*, struct bfd_link_info
*);
2727 extern bool _bfd_elf_link_check_relocs
2728 (bfd
*, struct bfd_link_info
*);
2729 extern bool _bfd_elf_link_iterate_on_relocs
2730 (bfd
*, struct bfd_link_info
*,
2731 bool (*) (bfd
*, struct bfd_link_info
*, asection
*,
2732 const Elf_Internal_Rela
*));
2734 extern bool bfd_elf_link_record_dynamic_symbol
2735 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
2737 extern int bfd_elf_link_record_local_dynamic_symbol
2738 (struct bfd_link_info
*, bfd
*, long);
2740 extern bool _bfd_elf_free_cached_info
2743 extern bool _bfd_elf_common_definition
2744 (Elf_Internal_Sym
*);
2746 extern unsigned int _bfd_elf_common_section_index
2749 extern asection
*_bfd_elf_common_section
2752 extern bfd_vma _bfd_elf_default_got_elt_size
2753 (bfd
*, struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd
*,
2756 extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn
2757 (bfd
*, arelent
*, struct bfd_symbol
*, void *,
2758 asection
*, bfd
*, char **);
2760 extern bool bfd_elf_final_link
2761 (bfd
*, struct bfd_link_info
*);
2763 extern void _bfd_elf_gc_keep
2764 (struct bfd_link_info
*info
);
2766 extern bool bfd_elf_gc_mark_dynamic_ref_symbol
2767 (struct elf_link_hash_entry
*h
, void *inf
);
2769 extern bool bfd_elf_gc_sections
2770 (bfd
*, struct bfd_link_info
*);
2772 extern bool bfd_elf_gc_record_vtinherit
2773 (bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
);
2775 extern bool bfd_elf_gc_record_vtentry
2776 (bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
);
2778 extern asection
*_bfd_elf_gc_mark_hook
2779 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
2780 struct elf_link_hash_entry
*, Elf_Internal_Sym
*);
2782 extern asection
*_bfd_elf_gc_mark_rsec
2783 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
,
2784 struct elf_reloc_cookie
*, bool *);
2786 extern bool _bfd_elf_gc_mark_reloc
2787 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
,
2788 struct elf_reloc_cookie
*);
2790 extern bool _bfd_elf_gc_mark_fdes
2791 (struct bfd_link_info
*, asection
*, asection
*, elf_gc_mark_hook_fn
,
2792 struct elf_reloc_cookie
*);
2794 extern bool _bfd_elf_gc_mark
2795 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
);
2797 extern bool _bfd_elf_gc_mark_extra_sections
2798 (struct bfd_link_info
*, elf_gc_mark_hook_fn
);
2800 extern bool bfd_elf_gc_common_finalize_got_offsets
2801 (bfd
*, struct bfd_link_info
*);
2803 extern bool bfd_elf_gc_common_final_link
2804 (bfd
*, struct bfd_link_info
*);
2806 extern bool bfd_elf_reloc_symbol_deleted_p
2809 extern struct elf_segment_map
* _bfd_elf_make_dynamic_segment
2810 (bfd
*, asection
*);
2812 extern bool _bfd_elf_map_sections_to_segments
2813 (bfd
*, struct bfd_link_info
*, bool *);
2815 extern bool _bfd_elf_is_function_type (unsigned int);
2817 extern bfd_size_type
_bfd_elf_maybe_function_sym (const asymbol
*, asection
*,
2820 extern asection
*_bfd_elf_plt_get_reloc_section (bfd
*, const char *);
2822 extern int bfd_elf_get_default_section_type (flagword
);
2824 extern bool bfd_elf_lookup_section_flags
2825 (struct bfd_link_info
*, struct flag_info
*, asection
*);
2827 extern Elf_Internal_Phdr
* _bfd_elf_find_segment_containing_section
2828 (bfd
* abfd
, asection
* section
);
2830 /* PowerPC @tls opcode transform/validate. */
2831 extern unsigned int _bfd_elf_ppc_at_tls_transform
2832 (unsigned int, unsigned int);
2833 /* PowerPC @tprel opcode transform/validate. */
2834 extern unsigned int _bfd_elf_ppc_at_tprel_transform
2835 (unsigned int, unsigned int);
2836 /* PowerPC elf_object_p tweak. */
2837 extern bool _bfd_elf_ppc_set_arch (bfd
*);
2838 /* PowerPC .gnu.attributes handling common to both 32-bit and 64-bit. */
2839 extern bool _bfd_elf_ppc_merge_fp_attributes
2840 (bfd
*, struct bfd_link_info
*);
2842 /* Return an upper bound on the number of bytes required to store a
2843 copy of ABFD's program header table entries. Return -1 if an error
2844 occurs; bfd_get_error will return an appropriate code. */
2845 extern long bfd_get_elf_phdr_upper_bound
2848 /* Copy ABFD's program header table entries to *PHDRS. The entries
2849 will be stored as an array of Elf_Internal_Phdr structures, as
2850 defined in include/elf/internal.h. To find out how large the
2851 buffer needs to be, call bfd_get_elf_phdr_upper_bound.
2853 Return the number of program header table entries read, or -1 if an
2854 error occurs; bfd_get_error will return an appropriate code. */
2855 extern int bfd_get_elf_phdrs
2856 (bfd
*abfd
, void *phdrs
);
2858 /* Exported interface for writing elf corefile notes. */
2859 extern char *elfcore_write_note
2860 (bfd
*, char *, int *, const char *, int, const void *, int);
2861 extern char *elfcore_write_prpsinfo
2862 (bfd
*, char *, int *, const char *, const char *);
2863 extern char *elfcore_write_prstatus
2864 (bfd
*, char *, int *, long, int, const void *);
2865 extern char * elfcore_write_pstatus
2866 (bfd
*, char *, int *, long, int, const void *);
2867 extern char *elfcore_write_prfpreg
2868 (bfd
*, char *, int *, const void *, int);
2869 extern char *elfcore_write_prxfpreg
2870 (bfd
*, char *, int *, const void *, int);
2871 extern char *elfcore_write_xstatereg
2872 (bfd
*, char *, int *, const void *, int);
2873 extern char *elfcore_write_x86_segbases
2874 (bfd
*, char *, int *, const void *, int);
2875 extern char *elfcore_write_ppc_vmx
2876 (bfd
*, char *, int *, const void *, int);
2877 extern char *elfcore_write_ppc_vsx
2878 (bfd
*, char *, int *, const void *, int);
2879 extern char *elfcore_write_ppc_tar
2880 (bfd
*, char *, int *, const void *, int);
2881 extern char *elfcore_write_ppc_ppr
2882 (bfd
*, char *, int *, const void *, int);
2883 extern char *elfcore_write_ppc_dscr
2884 (bfd
*, char *, int *, const void *, int);
2885 extern char *elfcore_write_ppc_ebb
2886 (bfd
*, char *, int *, const void *, int);
2887 extern char *elfcore_write_ppc_pmu
2888 (bfd
*, char *, int *, const void *, int);
2889 extern char *elfcore_write_ppc_tm_cgpr
2890 (bfd
*, char *, int *, const void *, int);
2891 extern char *elfcore_write_ppc_tm_cfpr
2892 (bfd
*, char *, int *, const void *, int);
2893 extern char *elfcore_write_ppc_tm_cvmx
2894 (bfd
*, char *, int *, const void *, int);
2895 extern char *elfcore_write_ppc_tm_cvsx
2896 (bfd
*, char *, int *, const void *, int);
2897 extern char *elfcore_write_ppc_tm_spr
2898 (bfd
*, char *, int *, const void *, int);
2899 extern char *elfcore_write_ppc_tm_ctar
2900 (bfd
*, char *, int *, const void *, int);
2901 extern char *elfcore_write_ppc_tm_cppr
2902 (bfd
*, char *, int *, const void *, int);
2903 extern char *elfcore_write_ppc_tm_cdscr
2904 (bfd
*, char *, int *, const void *, int);
2905 extern char *elfcore_write_s390_timer
2906 (bfd
*, char *, int *, const void *, int);
2907 extern char *elfcore_write_s390_todcmp
2908 (bfd
*, char *, int *, const void *, int);
2909 extern char *elfcore_write_s390_todpreg
2910 (bfd
*, char *, int *, const void *, int);
2911 extern char *elfcore_write_s390_ctrs
2912 (bfd
*, char *, int *, const void *, int);
2913 extern char *elfcore_write_s390_prefix
2914 (bfd
*, char *, int *, const void *, int);
2915 extern char *elfcore_write_s390_last_break
2916 (bfd
*, char *, int *, const void *, int);
2917 extern char *elfcore_write_s390_system_call
2918 (bfd
*, char *, int *, const void *, int);
2919 extern char *elfcore_write_s390_tdb
2920 (bfd
*, char *, int *, const void *, int);
2921 extern char *elfcore_write_s390_vxrs_low
2922 (bfd
*, char *, int *, const void *, int);
2923 extern char *elfcore_write_s390_vxrs_high
2924 (bfd
*, char *, int *, const void *, int);
2925 extern char *elfcore_write_s390_gs_cb
2926 (bfd
*, char *, int *, const void *, int);
2927 extern char *elfcore_write_s390_gs_bc
2928 (bfd
*, char *, int *, const void *, int);
2929 extern char *elfcore_write_arm_vfp
2930 (bfd
*, char *, int *, const void *, int);
2931 extern char *elfcore_write_aarch_tls
2932 (bfd
*, char *, int *, const void *, int);
2933 extern char *elfcore_write_aarch_hw_break
2934 (bfd
*, char *, int *, const void *, int);
2935 extern char *elfcore_write_aarch_hw_watch
2936 (bfd
*, char *, int *, const void *, int);
2937 extern char *elfcore_write_aarch_sve
2938 (bfd
*, char *, int *, const void *, int);
2939 extern char *elfcore_write_aarch_pauth
2940 (bfd
*, char *, int *, const void *, int);
2941 extern char *elfcore_write_aarch_mte
2942 (bfd
*, char *, int *, const void *, int);
2943 extern char *elfcore_write_aarch_ssve
2944 (bfd
*, char *, int *, const void *, int);
2945 extern char *elfcore_write_aarch_za
2946 (bfd
*, char *, int *, const void *, int);
2947 extern char *elfcore_write_aarch_zt
2948 (bfd
*, char *, int *, const void *, int);
2949 extern char *elfcore_write_arc_v2
2950 (bfd
*, char *, int *, const void *, int);
2951 extern char *elfcore_write_riscv_csr
2952 (bfd
*, char *, int *, const void *, int);
2953 extern char *elfcore_write_gdb_tdesc
2954 (bfd
*, char *, int *, const void *, int);
2955 extern char *elfcore_write_lwpstatus
2956 (bfd
*, char *, int *, long, int, const void *);
2957 extern char *elfcore_write_register_note
2958 (bfd
*, char *, int *, const char *, const void *, int);
2959 extern char *elfcore_write_file_note
2960 (bfd
*, char *, int *, const void*, int);
2961 extern char *elfcore_write_loongarch_cpucfg
2962 (bfd
*, char *, int *, const void*, int);
2963 extern char *elfcore_write_loongarch_lbt
2964 (bfd
*, char *, int *, const void*, int);
2965 extern char *elfcore_write_loongarch_lsx
2966 (bfd
*, char *, int *, const void*, int);
2967 extern char *elfcore_write_loongarch_lasx
2968 (bfd
*, char *, int *, const void*, int);
2970 /* Internal structure which holds information to be included in the
2971 PRPSINFO section of Linux core files.
2973 This is an "internal" structure in the sense that it should be used
2974 to pass information to BFD (via the `elfcore_write_linux_prpsinfo'
2975 function), so things like endianess shouldn't be an issue. This
2976 structure will eventually be converted in one of the
2977 `elf_external_linux_*' structures and written out to an output bfd
2978 by one of the functions declared below. */
2980 struct elf_internal_linux_prpsinfo
2982 char pr_state
; /* Numeric process state. */
2983 char pr_sname
; /* Char for pr_state. */
2984 char pr_zomb
; /* Zombie. */
2985 char pr_nice
; /* Nice val. */
2986 unsigned long pr_flag
; /* Flags. */
2987 unsigned int pr_uid
;
2988 unsigned int pr_gid
;
2989 int pr_pid
, pr_ppid
, pr_pgrp
, pr_sid
;
2990 char pr_fname
[16 + 1]; /* Filename of executable. */
2991 char pr_psargs
[80 + 1]; /* Initial part of arg list. */
2994 /* Linux/most 32-bit archs. */
2995 extern char *elfcore_write_linux_prpsinfo32
2996 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
2998 /* Linux/most 64-bit archs. */
2999 extern char *elfcore_write_linux_prpsinfo64
3000 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
3002 extern bfd
*_bfd_elf32_bfd_from_remote_memory
3003 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
3004 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, bfd_size_type
));
3005 extern bfd
*_bfd_elf64_bfd_from_remote_memory
3006 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
3007 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, bfd_size_type
));
3009 extern bfd_vma
bfd_elf_obj_attr_size (bfd
*);
3010 extern void bfd_elf_set_obj_attr_contents (bfd
*, bfd_byte
*, bfd_vma
);
3011 extern int bfd_elf_get_obj_attr_int (bfd
*, int, unsigned int);
3012 extern void bfd_elf_add_obj_attr_int (bfd
*, int, unsigned int, unsigned int);
3013 #define bfd_elf_add_proc_attr_int(BFD, TAG, VALUE) \
3014 bfd_elf_add_obj_attr_int ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
3015 extern void bfd_elf_add_obj_attr_string (bfd
*, int, unsigned int, const char *);
3016 #define bfd_elf_add_proc_attr_string(BFD, TAG, VALUE) \
3017 bfd_elf_add_obj_attr_string ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
3018 extern void bfd_elf_add_obj_attr_int_string (bfd
*, int, unsigned int,
3019 unsigned int, const char *);
3020 #define bfd_elf_add_proc_attr_int_string(BFD, TAG, INTVAL, STRVAL) \
3021 bfd_elf_add_obj_attr_int_string ((BFD), OBJ_ATTR_PROC, (TAG), \
3024 extern char *_bfd_elf_attr_strdup (bfd
*, const char *);
3025 extern void _bfd_elf_copy_obj_attributes (bfd
*, bfd
*);
3026 extern int _bfd_elf_obj_attrs_arg_type (bfd
*, int, unsigned int);
3027 extern void _bfd_elf_parse_attributes (bfd
*, Elf_Internal_Shdr
*);
3028 extern bool _bfd_elf_merge_object_attributes
3029 (bfd
*, struct bfd_link_info
*);
3030 extern bool _bfd_elf_merge_unknown_attribute_low (bfd
*, bfd
*, int);
3031 extern bool _bfd_elf_merge_unknown_attribute_list (bfd
*, bfd
*);
3032 extern Elf_Internal_Shdr
*_bfd_elf_single_rel_hdr (asection
*sec
);
3033 extern bool elf_read_notes (bfd
*, file_ptr
, bfd_size_type
, size_t);
3035 extern bool _bfd_elf_parse_gnu_properties
3036 (bfd
*, Elf_Internal_Note
*);
3037 extern elf_property
* _bfd_elf_get_property
3038 (bfd
*, unsigned int, unsigned int);
3039 extern bfd
*_bfd_elf_link_setup_gnu_properties
3040 (struct bfd_link_info
*);
3041 extern bfd_size_type _bfd_elf_convert_gnu_property_size
3043 extern bool _bfd_elf_convert_gnu_properties
3044 (bfd
*, asection
*, bfd
*, bfd_byte
**, bfd_size_type
*);
3046 /* The linker may need to keep track of the number of relocs that it
3047 decides to copy as dynamic relocs in check_relocs for each symbol.
3048 This is so that it can later discard them if they are found to be
3049 unnecessary. We can store the information in a field extending the
3050 regular ELF linker hash table. */
3052 struct elf_dyn_relocs
3054 struct elf_dyn_relocs
*next
;
3056 /* The input section of the reloc. */
3059 /* Total number of relocs copied for the input section. */
3060 bfd_size_type count
;
3062 /* Number of pc-relative relocs copied for the input section. */
3063 bfd_size_type pc_count
;
3066 extern bool _bfd_elf_create_ifunc_sections
3067 (bfd
*, struct bfd_link_info
*);
3068 extern bool _bfd_elf_allocate_ifunc_dyn_relocs
3069 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
3070 struct elf_dyn_relocs
**, unsigned int, unsigned int,
3071 unsigned int, bool);
3073 extern void elf_append_rela (bfd
*, asection
*, Elf_Internal_Rela
*);
3074 extern void elf_append_rel (bfd
*, asection
*, Elf_Internal_Rela
*);
3076 extern bfd_vma
elf64_r_info (bfd_vma
, bfd_vma
);
3077 extern bfd_vma
elf64_r_sym (bfd_vma
);
3078 extern bfd_vma
elf32_r_info (bfd_vma
, bfd_vma
);
3079 extern bfd_vma
elf32_r_sym (bfd_vma
);
3081 extern bool is_debuginfo_file (bfd
*);
3084 extern bool _bfd_elf_init_secondary_reloc_section
3085 (bfd
*, Elf_Internal_Shdr
*, const char *, unsigned int);
3086 extern bool _bfd_elf_slurp_secondary_reloc_section
3087 (bfd
*, asection
*, asymbol
**, bool);
3088 extern bool _bfd_elf_copy_special_section_fields
3089 (const bfd
*, bfd
*, const Elf_Internal_Shdr
*, Elf_Internal_Shdr
*);
3090 extern bool _bfd_elf_write_secondary_reloc_section
3091 (bfd
*, asection
*);
3092 extern unsigned int _bfd_elf_symbol_section_index
3093 (bfd
*, elf_symbol_type
*);
3095 extern asection
*_bfd_elf_readonly_dynrelocs
3096 (struct elf_link_hash_entry
*);
3097 extern bool _bfd_elf_maybe_set_textrel
3098 (struct elf_link_hash_entry
*, void *);
3100 extern bool _bfd_elf_add_dynamic_tags
3101 (bfd
*, struct bfd_link_info
*, bool);
3103 /* Large common section. */
3104 extern asection _bfd_elf_large_com_section
;
3106 /* Hash for local symbol with the first section id, ID, in the input
3107 file and the local symbol index, SYM. */
3108 #define ELF_LOCAL_SYMBOL_HASH(ID, SYM) \
3109 (((((ID) & 0xffU) << 24) | (((ID) & 0xff00) << 8)) \
3110 ^ (SYM) ^ (((ID) & 0xffff0000U) >> 16))
3112 /* This is the condition under which finish_dynamic_symbol will be called.
3113 If our finish_dynamic_symbol isn't called, we'll need to do something
3114 about initializing any .plt and .got entries in relocate_section. */
3115 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
3117 && ((SHARED) || !(H)->forced_local) \
3118 && ((H)->dynindx != -1 || (H)->forced_local))
3120 /* This macro is to avoid lots of duplicated code in the body
3121 of xxx_relocate_section() in the various elfxx-xxxx.c files. */
3122 #define RELOC_FOR_GLOBAL_SYMBOL(info, input_bfd, input_section, rel, \
3123 r_symndx, symtab_hdr, sym_hashes, \
3124 h, sec, relocation, \
3125 unresolved_reloc, warned, ignored) \
3128 /* It seems this can happen with erroneous or unsupported \
3129 input (mixing a.out and elf in an archive, for example.) */ \
3130 if (sym_hashes == NULL) \
3133 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; \
3135 if (info->wrap_hash != NULL \
3136 && (input_section->flags & SEC_DEBUGGING) != 0) \
3137 h = ((struct elf_link_hash_entry *) \
3138 unwrap_hash_lookup (info, input_bfd, &h->root)); \
3140 while (h->root.type == bfd_link_hash_indirect \
3141 || h->root.type == bfd_link_hash_warning) \
3142 h = (struct elf_link_hash_entry *) h->root.u.i.link; \
3146 unresolved_reloc = false; \
3148 if (h->root.type == bfd_link_hash_defined \
3149 || h->root.type == bfd_link_hash_defweak) \
3151 sec = h->root.u.def.section; \
3153 || sec->output_section == NULL) \
3154 /* Set a flag that will be cleared later if we find a \
3155 relocation value for this symbol. output_section \
3156 is typically NULL for symbols satisfied by a shared \
3158 unresolved_reloc = true; \
3160 relocation = (h->root.u.def.value \
3161 + sec->output_section->vma \
3162 + sec->output_offset); \
3164 else if (h->root.type == bfd_link_hash_undefweak) \
3166 else if (info->unresolved_syms_in_objects == RM_IGNORE \
3167 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) \
3169 else if (!bfd_link_relocatable (info)) \
3171 bool err = ((info->unresolved_syms_in_objects == RM_DIAGNOSE \
3172 && !info->warn_unresolved_syms) \
3173 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT); \
3174 (*info->callbacks->undefined_symbol) (info, \
3175 h->root.root.string, \
3178 rel->r_offset, err); \
3181 (void) unresolved_reloc; \
3187 /* This macro is to avoid lots of duplicated code in the body of the
3188 loop over relocations in xxx_relocate_section() in the various
3191 Handle relocations against symbols from removed linkonce sections,
3192 or sections discarded by a linker script. When doing a relocatable
3193 link, we remove such relocations. Otherwise, we just want the
3194 section contents zeroed and avoid any special processing. */
3195 #define RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
3196 rel, count, relend, \
3197 howto, index, contents) \
3200 _bfd_clear_contents (howto, input_bfd, input_section, \
3201 contents, rel[index].r_offset); \
3203 if (bfd_link_relocatable (info) \
3204 && (input_section->flags & SEC_DEBUGGING)) \
3206 /* Only remove relocations in debug sections since other \
3207 sections may require relocations. */ \
3208 Elf_Internal_Shdr *rel_hdr; \
3210 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
3212 /* Avoid empty output section. */ \
3213 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
3215 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
3216 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
3217 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
3219 memmove (rel, rel + count, \
3220 (relend - rel - count) * sizeof (*rel)); \
3222 input_section->reloc_count -= count; \
3229 for (i_ = 0; i_ < count; i_++) \
3231 rel[i_].r_info = 0; \
3232 rel[i_].r_addend = 0; \
3238 /* Will a symbol be bound to the definition within the shared
3239 library, if any. A unique symbol can never be bound locally. */
3240 #define SYMBOLIC_BIND(INFO, H) \
3241 (!(H)->unique_global \
3242 && ((INFO)->symbolic \
3243 || (H)->start_stop \
3244 || ((INFO)->dynamic && !(H)->dynamic)))
3246 /* Determine if a section contains CTF data, using its name. */
3248 bfd_section_is_ctf (const asection
*sec
)
3250 const char *name
= bfd_section_name (sec
);
3251 return startswith (name
, ".ctf") && (name
[4] == 0 || name
[4] == '.');
3257 #endif /* _LIBELF_H_ */