1 /* BFD back-end data structures for ELF files.
2 Copyright (C) 1992-2016 Free Software Foundation, Inc.
3 Written by Cygnus Support.
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 MA 02110-1301, USA. */
25 #include "elf/common.h"
26 #include "elf/external.h"
27 #include "elf/internal.h"
34 /* The number of entries in a section is its size divided by the size
35 of a single entry. This is normally only applicable to reloc and
36 symbol table sections.
37 PR 9934: It is possible to have relocations that do not refer to
38 symbols, thus it is also possible to have a relocation section in
39 an object file, but no symbol table. */
40 #define NUM_SHDR_ENTRIES(shdr) ((shdr)->sh_entsize > 0 ? (shdr)->sh_size / (shdr)->sh_entsize : 0)
42 /* If size isn't specified as 64 or 32, NAME macro should fail. */
45 #define NAME(x, y) x ## 64 ## _ ## y
48 #define NAME(x, y) x ## 32 ## _ ## y
53 #define NAME(x, y) x ## NOSIZE ## _ ## y
56 #define ElfNAME(X) NAME(Elf,X)
57 #define elfNAME(X) NAME(elf,X)
59 /* Information held for an ELF symbol. The first field is the
60 corresponding asymbol. Every symbol is an ELF file is actually a
61 pointer to this structure, although it is often handled as a
62 pointer to an asymbol. */
68 /* ELF symbol information. */
69 Elf_Internal_Sym internal_elf_sym
;
70 /* Backend specific information. */
73 unsigned int hppa_arg_reloc
;
79 /* Version information. This is from an Elf_Internal_Versym
80 structure in a SHT_GNU_versym section. It is zero if there is no
81 version information. */
82 unsigned short version
;
86 struct elf_strtab_hash
;
92 bfd_signed_vma refcount
;
94 struct got_entry
*glist
;
95 struct plt_entry
*plist
;
98 struct elf_link_virtual_table_entry
100 /* Virtual table entry use information. This array is nominally of size
101 size/sizeof(target_void_pointer), though we have to be able to assume
102 and track a size while the symbol is still undefined. It is indexed
103 via offset/sizeof(target_void_pointer). */
107 /* Virtual table derivation info. */
108 struct elf_link_hash_entry
*parent
;
111 /* ELF symbol version. */
112 enum elf_symbol_version
120 /* ELF linker hash table entries. */
122 struct elf_link_hash_entry
124 struct bfd_link_hash_entry root
;
126 /* Symbol index in output file. This is initialized to -1. It is
127 set to -2 if the symbol is used by a reloc. It is set to -3 if
128 this symbol is defined in a discarded section. */
131 /* Symbol index as a dynamic symbol. Initialized to -1, and remains
132 -1 if this is not a dynamic symbol. */
133 /* ??? Note that this is consistently used as a synonym for tests
134 against whether we can perform various simplifying transformations
135 to the code. (E.g. changing a pc-relative jump to a PLT entry
136 into a pc-relative jump to the target function.) That test, which
137 is often relatively complex, and someplaces wrong or incomplete,
138 should really be replaced by a predicate in elflink.c.
140 End result: this field -1 does not indicate that the symbol is
141 not in the dynamic symbol table, but rather that the symbol is
142 not visible outside this DSO. */
145 /* If this symbol requires an entry in the global offset table, the
146 processor specific backend uses this field to track usage and
147 final offset. Two schemes are supported: The first assumes that
148 a symbol may only have one GOT entry, and uses REFCOUNT until
149 size_dynamic_sections, at which point the contents of the .got is
150 fixed. Afterward, if OFFSET is -1, then the symbol does not
151 require a global offset table entry. The second scheme allows
152 multiple GOT entries per symbol, managed via a linked list
153 pointed to by GLIST. */
154 union gotplt_union got
;
156 /* Same, but tracks a procedure linkage table entry. */
157 union gotplt_union plt
;
162 /* Symbol type (STT_NOTYPE, STT_OBJECT, etc.). */
163 unsigned int type
: 8;
165 /* Symbol st_other value, symbol visibility. */
166 unsigned int other
: 8;
168 /* The symbol's st_target_internal value (see Elf_Internal_Sym). */
169 unsigned int target_internal
: 8;
171 /* Symbol is referenced by a non-shared object (other than the object
172 in which it is defined). */
173 unsigned int ref_regular
: 1;
174 /* Symbol is defined by a non-shared object. */
175 unsigned int def_regular
: 1;
176 /* Symbol is referenced by a shared object. */
177 unsigned int ref_dynamic
: 1;
178 /* Symbol is defined by a shared object. */
179 unsigned int def_dynamic
: 1;
180 /* Symbol has a non-weak reference from a non-shared object (other than
181 the object in which it is defined). */
182 unsigned int ref_regular_nonweak
: 1;
183 /* Dynamic symbol has been adjustd. */
184 unsigned int dynamic_adjusted
: 1;
185 /* Symbol needs a copy reloc. */
186 unsigned int needs_copy
: 1;
187 /* Symbol needs a procedure linkage table entry. */
188 unsigned int needs_plt
: 1;
189 /* Symbol appears in a non-ELF input file. */
190 unsigned int non_elf
: 1;
191 /* Symbol version information. */
192 ENUM_BITFIELD (elf_symbol_version
) versioned
: 2;
193 /* Symbol was forced to local scope due to a version script file. */
194 unsigned int forced_local
: 1;
195 /* Symbol was forced to be dynamic due to a version script file. */
196 unsigned int dynamic
: 1;
197 /* Symbol was marked during garbage collection. */
198 unsigned int mark
: 1;
199 /* Symbol is referenced by a non-GOT/non-PLT relocation. This is
200 not currently set by all the backends. */
201 unsigned int non_got_ref
: 1;
202 /* Symbol has a definition in a shared object.
203 FIXME: There is no real need for this field if def_dynamic is never
204 cleared and all places that test def_dynamic also test def_regular. */
205 unsigned int dynamic_def
: 1;
206 /* Symbol has a non-weak reference from a shared object. */
207 unsigned int ref_dynamic_nonweak
: 1;
208 /* Symbol is referenced with a relocation where C/C++ pointer equality
210 unsigned int pointer_equality_needed
: 1;
211 /* Symbol is a unique global symbol. */
212 unsigned int unique_global
: 1;
213 /* Symbol is defined by a shared library with non-default visibility
214 in a read/write section. */
215 unsigned int protected_def
: 1;
217 /* String table index in .dynstr if this is a dynamic symbol. */
218 unsigned long dynstr_index
;
222 /* If this is a weak defined symbol from a dynamic object, this
223 field points to a defined symbol with the same value, if there is
224 one. Otherwise it is NULL. */
225 struct elf_link_hash_entry
*weakdef
;
227 /* Hash value of the name computed using the ELF hash function.
228 Used part way through size_dynamic_sections, after we've finished
230 unsigned long elf_hash_value
;
233 /* Version information. */
236 /* This field is used for a symbol which is not defined in a
237 regular object. It points to the version information read in
238 from the dynamic object. */
239 Elf_Internal_Verdef
*verdef
;
240 /* This field is used for a symbol which is defined in a regular
241 object. It is set up in size_dynamic_sections. It points to
242 the version information we should write out for this symbol. */
243 struct bfd_elf_version_tree
*vertree
;
246 struct elf_link_virtual_table_entry
*vtable
;
249 /* Will references to this symbol always reference the symbol
251 #define SYMBOL_REFERENCES_LOCAL(INFO, H) \
252 _bfd_elf_symbol_refs_local_p (H, INFO, 0)
254 /* Will _calls_ to this symbol always call the version in this object? */
255 #define SYMBOL_CALLS_LOCAL(INFO, H) \
256 _bfd_elf_symbol_refs_local_p (H, INFO, 1)
258 /* Common symbols that are turned into definitions don't have the
259 DEF_REGULAR flag set, so they might appear to be undefined.
260 Symbols defined in linker scripts also don't have DEF_REGULAR set. */
261 #define ELF_COMMON_DEF_P(H) \
263 && !(H)->def_dynamic \
264 && (H)->root.type == bfd_link_hash_defined)
266 /* Records local symbols to be emitted in the dynamic symbol table. */
268 struct elf_link_local_dynamic_entry
270 struct elf_link_local_dynamic_entry
*next
;
272 /* The input bfd this symbol came from. */
275 /* The index of the local symbol being copied. */
278 /* The index in the outgoing dynamic symbol table. */
281 /* A copy of the input symbol. */
282 Elf_Internal_Sym isym
;
285 struct elf_link_loaded_list
287 struct elf_link_loaded_list
*next
;
291 /* Structures used by the eh_frame optimization code. */
296 /* If REMOVED == 1, this is the CIE that the FDE originally used.
297 The CIE belongs to the same .eh_frame input section as the FDE.
299 If REMOVED == 0, this is the CIE that we have chosen to use for
300 the output FDE. The CIE's REMOVED field is also 0, but the CIE
301 might belong to a different .eh_frame input section from the FDE.
303 May be NULL to signify that the FDE should be discarded. */
304 struct eh_cie_fde
*cie_inf
;
305 struct eh_cie_fde
*next_for_section
;
308 /* CIEs have three states:
310 - REMOVED && !MERGED: Slated for removal because we haven't yet
311 proven that an FDE needs it. FULL_CIE, if nonnull, points to
312 more detailed information about the CIE.
314 - REMOVED && MERGED: We have merged this CIE with MERGED_WITH,
315 which may not belong to the same input section.
317 - !REMOVED: We have decided to keep this CIE. SEC is the
318 .eh_frame input section that contains the CIE. */
320 struct cie
*full_cie
;
321 struct eh_cie_fde
*merged_with
;
325 /* The offset of the personality data from the start of the CIE,
326 or 0 if the CIE doesn't have any. */
327 unsigned int personality_offset
: 8;
329 /* True if we have marked relocations associated with this CIE. */
330 unsigned int gc_mark
: 1;
332 /* True if we have decided to turn an absolute LSDA encoding into
333 a PC-relative one. */
334 unsigned int make_lsda_relative
: 1;
336 /* True if we have decided to turn an absolute personality
337 encoding into a PC-relative one. */
338 unsigned int make_per_encoding_relative
: 1;
340 /* True if the CIE contains personality data and if that
341 data uses a PC-relative encoding. Always true when
342 make_per_encoding_relative is. */
343 unsigned int per_encoding_relative
: 1;
345 /* True if we need to add an 'R' (FDE encoding) entry to the
346 CIE's augmentation data. */
347 unsigned int add_fde_encoding
: 1;
349 /* True if we have merged this CIE with another. */
350 unsigned int merged
: 1;
353 unsigned int pad1
: 18;
356 unsigned int reloc_index
;
359 unsigned int new_offset
;
360 unsigned int fde_encoding
: 8;
361 unsigned int lsda_encoding
: 8;
362 unsigned int lsda_offset
: 8;
364 /* True if this entry represents a CIE, false if it represents an FDE. */
365 unsigned int cie
: 1;
367 /* True if this entry is currently marked for removal. */
368 unsigned int removed
: 1;
370 /* True if we need to add a 'z' (augmentation size) entry to the CIE's
371 augmentation data, and an associated byte to each of the CIE's FDEs. */
372 unsigned int add_augmentation_size
: 1;
374 /* True if we have decided to convert absolute FDE relocations into
375 relative ones. This applies to the first relocation in the FDE,
376 which is against the code that the FDE describes. */
377 unsigned int make_relative
: 1;
380 unsigned int pad1
: 4;
382 unsigned int *set_loc
;
385 struct eh_frame_sec_info
389 struct eh_cie_fde entry
[1];
392 struct eh_frame_array_ent
401 #define DWARF2_EH_HDR 1
402 #define COMPACT_EH_HDR 2
404 /* Endian-neutral code indicating that a function cannot be unwound. */
405 #define COMPACT_EH_CANT_UNWIND_OPCODE 0x015d5d01
407 struct dwarf_eh_frame_hdr_info
410 unsigned int fde_count
;
411 /* TRUE if .eh_frame_hdr should contain the sorted search table.
412 We build it if we successfully read all .eh_frame input sections
413 and recognize them. */
415 struct eh_frame_array_ent
*array
;
418 struct compact_eh_frame_hdr_info
420 unsigned int allocated_entries
;
421 /* eh_frame_entry fragments. */
425 struct eh_frame_hdr_info
428 unsigned int array_count
;
429 bfd_boolean frame_hdr_is_compact
;
432 struct dwarf_eh_frame_hdr_info dwarf
;
433 struct compact_eh_frame_hdr_info compact
;
438 /* Enum used to identify target specific extensions to the elf_obj_tdata
439 and elf_link_hash_table structures. Note the enums deliberately start
440 from 1 so that we can detect an uninitialized field. The generic value
441 is last so that additions to this enum do not need to modify more than
445 AARCH64_ELF_DATA
= 1,
484 struct elf_sym_strtab
486 Elf_Internal_Sym sym
;
487 unsigned long dest_index
;
488 unsigned long destshndx_index
;
491 /* ELF linker hash table. */
493 struct elf_link_hash_table
495 struct bfd_link_hash_table root
;
497 /* An identifier used to distinguish different target
498 specific extensions to this structure. */
499 enum elf_target_id hash_table_id
;
501 /* Whether we have created the special dynamic sections required
502 when linking against or generating a shared object. */
503 bfd_boolean dynamic_sections_created
;
505 /* True if this target has relocatable executables, so needs dynamic
507 bfd_boolean is_relocatable_executable
;
509 /* The BFD used to hold special sections created by the linker.
510 This will be the first BFD found which requires these sections to
514 /* The value to use when initialising got.refcount/offset and
515 plt.refcount/offset in an elf_link_hash_entry. Set to zero when
516 the values are refcounts. Set to init_got_offset/init_plt_offset
517 in size_dynamic_sections when the values may be offsets. */
518 union gotplt_union init_got_refcount
;
519 union gotplt_union init_plt_refcount
;
521 /* The value to use for got.refcount/offset and plt.refcount/offset
522 when the values may be offsets. Normally (bfd_vma) -1. */
523 union gotplt_union init_got_offset
;
524 union gotplt_union init_plt_offset
;
526 /* The number of symbols found in the link which is intended for the
527 mandatory DT_SYMTAB tag (.dynsym section) in .dynamic section. */
528 bfd_size_type dynsymcount
;
529 bfd_size_type local_dynsymcount
;
531 /* The string table of dynamic symbols, which becomes the .dynstr
533 struct elf_strtab_hash
*dynstr
;
535 /* The number of symbol strings found in the link which must be put
536 into the .strtab section. */
537 bfd_size_type strtabcount
;
539 /* The array size of the symbol string table, which becomes the
541 bfd_size_type strtabsize
;
543 /* The array of strings, which becomes the .strtab section. */
544 struct elf_sym_strtab
*strtab
;
546 /* The number of buckets in the hash table in the .hash section.
547 This is based on the number of dynamic symbols. */
548 bfd_size_type bucketcount
;
550 /* A linked list of DT_NEEDED names found in dynamic objects
551 included in the link. */
552 struct bfd_link_needed_list
*needed
;
554 /* Sections in the output bfd that provides a section symbol
555 to be used by relocations emitted against local symbols.
556 Most targets will not use data_index_section. */
557 asection
*text_index_section
;
558 asection
*data_index_section
;
560 /* The _GLOBAL_OFFSET_TABLE_ symbol. */
561 struct elf_link_hash_entry
*hgot
;
563 /* The _PROCEDURE_LINKAGE_TABLE_ symbol. */
564 struct elf_link_hash_entry
*hplt
;
566 /* The _DYNAMIC symbol. */
567 struct elf_link_hash_entry
*hdynamic
;
569 /* A pointer to information used to merge SEC_MERGE sections. */
572 /* Used to link stabs in sections. */
573 struct stab_info stab_info
;
575 /* Used by eh_frame code when editing .eh_frame. */
576 struct eh_frame_hdr_info eh_info
;
578 /* A linked list of local symbols to be added to .dynsym. */
579 struct elf_link_local_dynamic_entry
*dynlocal
;
581 /* A linked list of DT_RPATH/DT_RUNPATH names found in dynamic
582 objects included in the link. */
583 struct bfd_link_needed_list
*runpath
;
585 /* Cached first output tls section and size of PT_TLS segment. */
587 bfd_size_type tls_size
;
589 /* A linked list of BFD's loaded in the link. */
590 struct elf_link_loaded_list
*loaded
;
592 /* Short-cuts to get to dynamic linker sections. */
605 /* Look up an entry in an ELF linker hash table. */
607 #define elf_link_hash_lookup(table, string, create, copy, follow) \
608 ((struct elf_link_hash_entry *) \
609 bfd_link_hash_lookup (&(table)->root, (string), (create), \
612 /* Traverse an ELF linker hash table. */
614 #define elf_link_hash_traverse(table, func, info) \
615 (bfd_link_hash_traverse \
617 (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func), \
620 /* Get the ELF linker hash table from a link_info structure. */
622 #define elf_hash_table(p) ((struct elf_link_hash_table *) ((p)->hash))
624 #define elf_hash_table_id(table) ((table) -> hash_table_id)
626 /* Returns TRUE if the hash table is a struct elf_link_hash_table. */
627 #define is_elf_hash_table(htab) \
628 (((struct bfd_link_hash_table *) (htab))->type == bfd_link_elf_hash_table)
630 /* Used by bfd_sym_from_r_symndx to cache a small number of local
632 #define LOCAL_SYM_CACHE_SIZE 32
636 unsigned long indx
[LOCAL_SYM_CACHE_SIZE
];
637 Elf_Internal_Sym sym
[LOCAL_SYM_CACHE_SIZE
];
640 /* Constant information held for an ELF backend. */
642 struct elf_size_info
{
643 unsigned char sizeof_ehdr
, sizeof_phdr
, sizeof_shdr
;
644 unsigned char sizeof_rel
, sizeof_rela
, sizeof_sym
, sizeof_dyn
, sizeof_note
;
646 /* The size of entries in the .hash section. */
647 unsigned char sizeof_hash_entry
;
649 /* The number of internal relocations to allocate per external
651 unsigned char int_rels_per_ext_rel
;
652 /* We use some fixed size arrays. This should be large enough to
653 handle all back-ends. */
654 #define MAX_INT_RELS_PER_EXT_REL 3
656 unsigned char arch_size
, log_file_align
;
657 unsigned char elfclass
, ev_current
;
658 int (*write_out_phdrs
)
659 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
661 (*write_shdrs_and_ehdr
) (bfd
*);
662 bfd_boolean (*checksum_contents
)
663 (bfd
* , void (*) (const void *, size_t, void *), void *);
665 (bfd
*, asection
*, void *);
666 bfd_boolean (*swap_symbol_in
)
667 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
668 void (*swap_symbol_out
)
669 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
670 bfd_boolean (*slurp_reloc_table
)
671 (bfd
*, asection
*, asymbol
**, bfd_boolean
);
672 long (*slurp_symbol_table
)
673 (bfd
*, asymbol
**, bfd_boolean
);
675 (bfd
*, const void *, Elf_Internal_Dyn
*);
677 (bfd
*, const Elf_Internal_Dyn
*, void *);
679 /* This function is called to swap in a REL relocation. If an
680 external relocation corresponds to more than one internal
681 relocation, then all relocations are swapped in at once. */
682 void (*swap_reloc_in
)
683 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
685 /* This function is called to swap out a REL relocation. */
686 void (*swap_reloc_out
)
687 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
689 /* This function is called to swap in a RELA relocation. If an
690 external relocation corresponds to more than one internal
691 relocation, then all relocations are swapped in at once. */
692 void (*swap_reloca_in
)
693 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
695 /* This function is called to swap out a RELA relocation. */
696 void (*swap_reloca_out
)
697 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
700 #define elf_symbol_from(ABFD,S) \
701 (((S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \
702 && (S)->the_bfd->tdata.elf_obj_data != 0) \
703 ? (elf_symbol_type *) (S) \
706 enum elf_reloc_type_class
{
708 reloc_class_relative
,
714 struct elf_reloc_cookie
716 Elf_Internal_Rela
*rels
, *rel
, *relend
;
717 Elf_Internal_Sym
*locsyms
;
721 struct elf_link_hash_entry
**sym_hashes
;
723 bfd_boolean bad_symtab
;
726 /* The level of IRIX compatibility we're striving for. */
734 /* Mapping of ELF section names and types. */
735 struct bfd_elf_special_section
738 unsigned int prefix_length
;
739 /* 0 means name must match PREFIX exactly.
740 -1 means name must start with PREFIX followed by an arbitrary string.
741 -2 means name must match PREFIX exactly or consist of PREFIX followed
742 by a dot then anything.
743 > 0 means name must start with the first PREFIX_LENGTH chars of
744 PREFIX and finish with the last SUFFIX_LENGTH chars of PREFIX. */
745 signed int suffix_length
;
750 enum action_discarded
756 typedef asection
* (*elf_gc_mark_hook_fn
)
757 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
758 struct elf_link_hash_entry
*, Elf_Internal_Sym
*);
760 struct bfd_elf_section_reloc_data
;
762 struct elf_backend_data
764 /* The architecture for this backend. */
765 enum bfd_architecture arch
;
767 /* An identifier used to distinguish different target specific
768 extensions to elf_obj_tdata and elf_link_hash_table structures. */
769 enum elf_target_id target_id
;
771 /* The ELF machine code (EM_xxxx) for this backend. */
772 int elf_machine_code
;
777 /* The maximum page size for this backend. */
780 /* The minimum page size for this backend. An input object will not be
781 considered page aligned unless its sections are correctly aligned for
782 pages at least this large. May be smaller than maxpagesize. */
785 /* The common page size for this backend. */
786 bfd_vma commonpagesize
;
788 /* The BFD flags applied to sections created for dynamic linking. */
789 flagword dynamic_sec_flags
;
791 /* Architecture-specific data for this backend.
792 This is actually a pointer to some type like struct elf_ARCH_data. */
793 const void *arch_data
;
795 /* A function to translate an ELF RELA relocation to a BFD arelent
797 void (*elf_info_to_howto
)
798 (bfd
*, arelent
*, Elf_Internal_Rela
*);
800 /* A function to translate an ELF REL relocation to a BFD arelent
802 void (*elf_info_to_howto_rel
)
803 (bfd
*, arelent
*, Elf_Internal_Rela
*);
805 /* A function to determine whether a symbol is global when
806 partitioning the symbol table into local and global symbols.
807 This should be NULL for most targets, in which case the correct
808 thing will be done. MIPS ELF, at least on the Irix 5, has
809 special requirements. */
810 bfd_boolean (*elf_backend_sym_is_global
)
813 /* The remaining functions are hooks which are called only if they
816 /* A function to permit a backend specific check on whether a
817 particular BFD format is relevant for an object file, and to
818 permit the backend to set any global information it wishes. When
819 this is called elf_elfheader is set, but anything else should be
820 used with caution. If this returns FALSE, the check_format
821 routine will return a bfd_error_wrong_format error. */
822 bfd_boolean (*elf_backend_object_p
)
825 /* A function to do additional symbol processing when reading the
826 ELF symbol table. This is where any processor-specific special
827 section indices are handled. */
828 void (*elf_backend_symbol_processing
)
831 /* A function to do additional symbol processing after reading the
832 entire ELF symbol table. */
833 bfd_boolean (*elf_backend_symbol_table_processing
)
834 (bfd
*, elf_symbol_type
*, unsigned int);
836 /* A function to set the type of the info field. Processor-specific
837 types should be handled here. */
838 int (*elf_backend_get_symbol_type
)
839 (Elf_Internal_Sym
*, int);
841 /* A function to return the linker hash table entry of a symbol that
842 might be satisfied by an archive symbol. */
843 struct elf_link_hash_entry
* (*elf_backend_archive_symbol_lookup
)
844 (bfd
*, struct bfd_link_info
*, const char *);
846 /* Return true if local section symbols should have a non-null st_name.
847 NULL implies false. */
848 bfd_boolean (*elf_backend_name_local_section_symbols
)
851 /* A function to do additional processing on the ELF section header
852 just before writing it out. This is used to set the flags and
853 type fields for some sections, or to actually write out data for
855 bfd_boolean (*elf_backend_section_processing
)
856 (bfd
*, Elf_Internal_Shdr
*);
858 /* A function to handle unusual section types when creating BFD
859 sections from ELF sections. */
860 bfd_boolean (*elf_backend_section_from_shdr
)
861 (bfd
*, Elf_Internal_Shdr
*, const char *, int);
863 /* A function to convert machine dependent ELF section header flags to
864 BFD internal section header flags. */
865 bfd_boolean (*elf_backend_section_flags
)
866 (flagword
*, const Elf_Internal_Shdr
*);
868 /* A function that returns a struct containing ELF section flags and
869 type for the given BFD section. */
870 const struct bfd_elf_special_section
* (*get_sec_type_attr
)
873 /* A function to handle unusual program segment types when creating BFD
874 sections from ELF program segments. */
875 bfd_boolean (*elf_backend_section_from_phdr
)
876 (bfd
*, Elf_Internal_Phdr
*, int, const char *);
878 /* A function to set up the ELF section header for a BFD section in
879 preparation for writing it out. This is where the flags and type
880 fields are set for unusual sections. */
881 bfd_boolean (*elf_backend_fake_sections
)
882 (bfd
*, Elf_Internal_Shdr
*, asection
*);
884 /* A function to get the ELF section index for a BFD section. If
885 this returns TRUE, the section was found. If it is a normal ELF
886 section, *RETVAL should be left unchanged. If it is not a normal
887 ELF section *RETVAL should be set to the SHN_xxxx index. */
888 bfd_boolean (*elf_backend_section_from_bfd_section
)
889 (bfd
*, asection
*, int *retval
);
891 /* If this field is not NULL, it is called by the add_symbols phase
892 of a link just before adding a symbol to the global linker hash
893 table. It may modify any of the fields as it wishes. If *NAME
894 is set to NULL, the symbol will be skipped rather than being
895 added to the hash table. This function is responsible for
896 handling all processor dependent symbol bindings and section
897 indices, and must set at least *FLAGS and *SEC for each processor
898 dependent case; failure to do so will cause a link error. */
899 bfd_boolean (*elf_add_symbol_hook
)
900 (bfd
*abfd
, struct bfd_link_info
*info
, Elf_Internal_Sym
*,
901 const char **name
, flagword
*flags
, asection
**sec
, bfd_vma
*value
);
903 /* If this field is not NULL, it is called by the elf_link_output_sym
904 phase of a link for each symbol which will appear in the object file.
905 On error, this function returns 0. 1 is returned when the symbol
906 should be output, 2 is returned when the symbol should be discarded. */
907 int (*elf_backend_link_output_symbol_hook
)
908 (struct bfd_link_info
*info
, const char *, Elf_Internal_Sym
*,
909 asection
*, struct elf_link_hash_entry
*);
911 /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend
912 linker the first time it encounters a dynamic object in the link.
913 This function must create any sections required for dynamic
914 linking. The ABFD argument is a dynamic object. The .interp,
915 .dynamic, .dynsym, .dynstr, and .hash functions have already been
916 created, and this function may modify the section flags if
917 desired. This function will normally create the .got and .plt
918 sections, but different backends have different requirements. */
919 bfd_boolean (*elf_backend_create_dynamic_sections
)
920 (bfd
*abfd
, struct bfd_link_info
*info
);
922 /* When creating a shared library, determine whether to omit the
923 dynamic symbol for the section. */
924 bfd_boolean (*elf_backend_omit_section_dynsym
)
925 (bfd
*output_bfd
, struct bfd_link_info
*info
, asection
*osec
);
927 /* Return TRUE if relocations of targets are compatible to the extent
928 that CHECK_RELOCS will properly process them. PR 4424. */
929 bfd_boolean (*relocs_compatible
) (const bfd_target
*, const bfd_target
*);
931 /* The CHECK_RELOCS function is called by the add_symbols phase of
932 the ELF backend linker. It is called once for each section with
933 relocs of an object file, just after the symbols for the object
934 file have been added to the global linker hash table. The
935 function must look through the relocs and do any special handling
936 required. This generally means allocating space in the global
937 offset table, and perhaps allocating space for a reloc. The
938 relocs are always passed as Rela structures; if the section
939 actually uses Rel structures, the r_addend field will always be
941 bfd_boolean (*check_relocs
)
942 (bfd
*abfd
, struct bfd_link_info
*info
, asection
*o
,
943 const Elf_Internal_Rela
*relocs
);
945 /* The CHECK_DIRECTIVES function is called once per input file by
946 the add_symbols phase of the ELF backend linker. The function
947 must inspect the bfd and create any additional symbols according
948 to any custom directives in the bfd. */
949 bfd_boolean (*check_directives
)
950 (bfd
*abfd
, struct bfd_link_info
*info
);
952 /* The NOTICE_AS_NEEDED function is called as the linker is about to
953 handle an as-needed lib (ACT = notice_as_needed), and after the
954 linker has decided to keep the lib (ACT = notice_needed) or when
955 the lib is not needed (ACT = notice_not_needed). */
956 bfd_boolean (*notice_as_needed
)
957 (bfd
*abfd
, struct bfd_link_info
*info
, enum notice_asneeded_action act
);
959 /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
960 linker for every symbol which is defined by a dynamic object and
961 referenced by a regular object. This is called after all the
962 input files have been seen, but before the SIZE_DYNAMIC_SECTIONS
963 function has been called. The hash table entry should be
964 bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be
965 defined in a section from a dynamic object. Dynamic object
966 sections are not included in the final link, and this function is
967 responsible for changing the value to something which the rest of
968 the link can deal with. This will normally involve adding an
969 entry to the .plt or .got or some such section, and setting the
970 symbol to point to that. */
971 bfd_boolean (*elf_backend_adjust_dynamic_symbol
)
972 (struct bfd_link_info
*info
, struct elf_link_hash_entry
*h
);
974 /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker
975 after all the linker input files have been seen but before the
976 section sizes have been set. This is called after
977 ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS. */
978 bfd_boolean (*elf_backend_always_size_sections
)
979 (bfd
*output_bfd
, struct bfd_link_info
*info
);
981 /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend
982 linker after all the linker input files have been seen but before
983 the sections sizes have been set. This is called after
984 ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols.
985 It is only called when linking against a dynamic object. It must
986 set the sizes of the dynamic sections, and may fill in their
987 contents as well. The generic ELF linker can handle the .dynsym,
988 .dynstr and .hash sections. This function must handle the
989 .interp section and any sections created by the
990 CREATE_DYNAMIC_SECTIONS entry point. */
991 bfd_boolean (*elf_backend_size_dynamic_sections
)
992 (bfd
*output_bfd
, struct bfd_link_info
*info
);
994 /* Set TEXT_INDEX_SECTION and DATA_INDEX_SECTION, the output sections
995 we keep to use as a base for relocs and symbols. */
996 void (*elf_backend_init_index_section
)
997 (bfd
*output_bfd
, struct bfd_link_info
*info
);
999 /* The RELOCATE_SECTION function is called by the ELF backend linker
1000 to handle the relocations for a section.
1002 The relocs are always passed as Rela structures; if the section
1003 actually uses Rel structures, the r_addend field will always be
1006 This function is responsible for adjust the section contents as
1007 necessary, and (if using Rela relocs and generating a
1008 relocatable output file) adjusting the reloc addend as
1011 This function does not have to worry about setting the reloc
1012 address or the reloc symbol index.
1014 LOCAL_SYMS is a pointer to the swapped in local symbols.
1016 LOCAL_SECTIONS is an array giving the section in the input file
1017 corresponding to the st_shndx field of each local symbol.
1019 The global hash table entry for the global symbols can be found
1020 via elf_sym_hashes (input_bfd).
1022 When generating relocatable output, this function must handle
1023 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
1024 going to be the section symbol corresponding to the output
1025 section, which means that the addend must be adjusted
1028 Returns FALSE on error, TRUE on success, 2 if successful and
1029 relocations should be written for this section. */
1030 int (*elf_backend_relocate_section
)
1031 (bfd
*output_bfd
, struct bfd_link_info
*info
, bfd
*input_bfd
,
1032 asection
*input_section
, bfd_byte
*contents
, Elf_Internal_Rela
*relocs
,
1033 Elf_Internal_Sym
*local_syms
, asection
**local_sections
);
1035 /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend
1036 linker just before it writes a symbol out to the .dynsym section.
1037 The processor backend may make any required adjustment to the
1038 symbol. It may also take the opportunity to set contents of the
1039 dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on
1040 all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called
1041 on those symbols which are defined by a dynamic object. */
1042 bfd_boolean (*elf_backend_finish_dynamic_symbol
)
1043 (bfd
*output_bfd
, struct bfd_link_info
*info
,
1044 struct elf_link_hash_entry
*h
, Elf_Internal_Sym
*sym
);
1046 /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend
1047 linker just before it writes all the dynamic sections out to the
1048 output file. The FINISH_DYNAMIC_SYMBOL will have been called on
1049 all dynamic symbols. */
1050 bfd_boolean (*elf_backend_finish_dynamic_sections
)
1051 (bfd
*output_bfd
, struct bfd_link_info
*info
);
1053 /* A function to do any beginning processing needed for the ELF file
1054 before building the ELF headers and computing file positions. */
1055 void (*elf_backend_begin_write_processing
)
1056 (bfd
*, struct bfd_link_info
*);
1058 /* A function to do any final processing needed for the ELF file
1059 before writing it out. The LINKER argument is TRUE if this BFD
1060 was created by the ELF backend linker. */
1061 void (*elf_backend_final_write_processing
)
1062 (bfd
*, bfd_boolean linker
);
1064 /* This function is called by get_program_header_size. It should
1065 return the number of additional program segments which this BFD
1066 will need. It should return -1 on error. */
1067 int (*elf_backend_additional_program_headers
)
1068 (bfd
*, struct bfd_link_info
*);
1070 /* This function is called to modify an existing segment map in a
1071 backend specific fashion. */
1072 bfd_boolean (*elf_backend_modify_segment_map
)
1073 (bfd
*, struct bfd_link_info
*);
1075 /* This function is called to modify program headers just before
1076 they are written. */
1077 bfd_boolean (*elf_backend_modify_program_headers
)
1078 (bfd
*, struct bfd_link_info
*);
1080 /* This function is called to see if the PHDR header should be
1081 checked for validity. */
1082 bfd_boolean (*elf_backend_allow_non_load_phdr
)
1083 (bfd
*, const Elf_Internal_Phdr
*, unsigned);
1085 /* This function is called before section garbage collection to
1086 mark entry symbol sections. */
1088 (struct bfd_link_info
*);
1090 /* This function is called during section garbage collection to
1091 mark sections that define global symbols. */
1092 bfd_boolean (*gc_mark_dynamic_ref
)
1093 (struct elf_link_hash_entry
*, void *);
1095 /* This function is called during section gc to discover the section a
1096 particular relocation refers to. */
1097 elf_gc_mark_hook_fn gc_mark_hook
;
1099 /* This function, if defined, is called after the first gc marking pass
1100 to allow the backend to mark additional sections. */
1101 bfd_boolean (*gc_mark_extra_sections
)
1102 (struct bfd_link_info
*, elf_gc_mark_hook_fn
);
1104 /* This function, if defined, is called during the sweep phase of gc
1105 in order that a backend might update any data structures it might
1107 bfd_boolean (*gc_sweep_hook
)
1108 (bfd
*, struct bfd_link_info
*, asection
*, const Elf_Internal_Rela
*);
1110 /* This function, if defined, is called after the ELF headers have
1111 been created. This allows for things like the OS and ABI versions
1113 void (*elf_backend_post_process_headers
)
1114 (bfd
*, struct bfd_link_info
*);
1116 /* This function, if defined, prints a symbol to file and returns the
1117 name of the symbol to be printed. It should return NULL to fall
1118 back to default symbol printing. */
1119 const char *(*elf_backend_print_symbol_all
)
1120 (bfd
*, void *, asymbol
*);
1122 /* This function, if defined, is called after all local symbols and
1123 global symbols converted to locals are emitted into the symtab
1124 section. It allows the backend to emit special local symbols
1125 not handled in the hash table. */
1126 bfd_boolean (*elf_backend_output_arch_local_syms
)
1127 (bfd
*, struct bfd_link_info
*, void *,
1128 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym
*, asection
*,
1129 struct elf_link_hash_entry
*));
1131 /* This function, if defined, is called after all symbols are emitted
1132 into the symtab section. It allows the backend to emit special
1133 global symbols not handled in the hash table. */
1134 bfd_boolean (*elf_backend_output_arch_syms
)
1135 (bfd
*, struct bfd_link_info
*, void *,
1136 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym
*, asection
*,
1137 struct elf_link_hash_entry
*));
1139 /* Filter what symbols of the output file to include in the import
1140 library if one is created. */
1141 unsigned int (*elf_backend_filter_implib_symbols
)
1142 (bfd
*, struct bfd_link_info
*, asymbol
**, long);
1144 /* Copy any information related to dynamic linking from a pre-existing
1145 symbol to a newly created symbol. Also called to copy flags and
1146 other back-end info to a weakdef, in which case the symbol is not
1147 newly created and plt/got refcounts and dynamic indices should not
1149 void (*elf_backend_copy_indirect_symbol
)
1150 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
1151 struct elf_link_hash_entry
*);
1153 /* Modify any information related to dynamic linking such that the
1154 symbol is not exported. */
1155 void (*elf_backend_hide_symbol
)
1156 (struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd_boolean
);
1158 /* A function to do additional symbol fixup, called by
1159 _bfd_elf_fix_symbol_flags. */
1160 bfd_boolean (*elf_backend_fixup_symbol
)
1161 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
1163 /* Merge the backend specific symbol attribute. */
1164 void (*elf_backend_merge_symbol_attribute
)
1165 (struct elf_link_hash_entry
*, const Elf_Internal_Sym
*, bfd_boolean
,
1168 /* This function, if defined, will return a string containing the
1169 name of a target-specific dynamic tag. */
1170 char *(*elf_backend_get_target_dtag
)
1173 /* Decide whether an undefined symbol is special and can be ignored.
1174 This is the case for OPTIONAL symbols on IRIX. */
1175 bfd_boolean (*elf_backend_ignore_undef_symbol
)
1176 (struct elf_link_hash_entry
*);
1178 /* Emit relocations. Overrides default routine for emitting relocs,
1179 except during a relocatable link, or if all relocs are being emitted. */
1180 bfd_boolean (*elf_backend_emit_relocs
)
1181 (bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*,
1182 struct elf_link_hash_entry
**);
1184 /* Update relocations. It is allowed to change the number and the order.
1185 In such a case hashes should be invalidated. */
1186 void (*elf_backend_update_relocs
)
1187 (asection
*, struct bfd_elf_section_reloc_data
*);
1189 /* Count relocations. Not called for relocatable links
1190 or if all relocs are being preserved in the output. */
1191 unsigned int (*elf_backend_count_relocs
)
1192 (struct bfd_link_info
*, asection
*);
1194 /* Count additionals relocations. Called for relocatable links if
1195 additional relocations needs to be created. */
1196 unsigned int (*elf_backend_count_additional_relocs
)
1199 /* Say whether to sort relocs output by ld -r and ld --emit-relocs,
1200 by r_offset. If NULL, default to true. */
1201 bfd_boolean (*sort_relocs_p
)
1204 /* This function, if defined, is called when an NT_PRSTATUS note is found
1206 bfd_boolean (*elf_backend_grok_prstatus
)
1207 (bfd
*, Elf_Internal_Note
*);
1209 /* This function, if defined, is called when an NT_PSINFO or NT_PRPSINFO
1210 note is found in a core file. */
1211 bfd_boolean (*elf_backend_grok_psinfo
)
1212 (bfd
*, Elf_Internal_Note
*);
1214 /* This function, if defined, is called to write a note to a corefile. */
1215 char *(*elf_backend_write_core_note
)
1216 (bfd
*abfd
, char *buf
, int *bufsiz
, int note_type
, ...);
1218 /* This function, if defined, is called to convert target-specific
1219 section flag names into hex values. */
1220 flagword (*elf_backend_lookup_section_flags_hook
)
1223 /* This function returns class of a reloc type. */
1224 enum elf_reloc_type_class (*elf_backend_reloc_type_class
)
1225 (const struct bfd_link_info
*, const asection
*, const Elf_Internal_Rela
*);
1227 /* This function, if defined, removes information about discarded functions
1228 from other sections which mention them. */
1229 bfd_boolean (*elf_backend_discard_info
)
1230 (bfd
*, struct elf_reloc_cookie
*, struct bfd_link_info
*);
1232 /* This function, if defined, signals that the function above has removed
1233 the discarded relocations for this section. */
1234 bfd_boolean (*elf_backend_ignore_discarded_relocs
)
1237 /* What to do when ld finds relocations against symbols defined in
1238 discarded sections. */
1239 unsigned int (*action_discarded
)
1242 /* This function returns the width of FDE pointers in bytes, or 0 if
1243 that can't be determined for some reason. The default definition
1244 goes by the bfd's EI_CLASS. */
1245 unsigned int (*elf_backend_eh_frame_address_size
)
1246 (bfd
*, asection
*);
1248 /* These functions tell elf-eh-frame whether to attempt to turn
1249 absolute or lsda encodings into pc-relative ones. The default
1250 definition enables these transformations. */
1251 bfd_boolean (*elf_backend_can_make_relative_eh_frame
)
1252 (bfd
*, struct bfd_link_info
*, asection
*);
1253 bfd_boolean (*elf_backend_can_make_lsda_relative_eh_frame
)
1254 (bfd
*, struct bfd_link_info
*, asection
*);
1256 /* This function returns an encoding after computing the encoded
1257 value (and storing it in ENCODED) for the given OFFSET into OSEC,
1258 to be stored in at LOC_OFFSET into the LOC_SEC input section.
1259 The default definition chooses a 32-bit PC-relative encoding. */
1260 bfd_byte (*elf_backend_encode_eh_address
)
1261 (bfd
*abfd
, struct bfd_link_info
*info
,
1262 asection
*osec
, bfd_vma offset
,
1263 asection
*loc_sec
, bfd_vma loc_offset
,
1266 /* This function, if defined, may write out the given section.
1267 Returns TRUE if it did so and FALSE if the caller should. */
1268 bfd_boolean (*elf_backend_write_section
)
1269 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
1271 /* The level of IRIX compatibility we're striving for.
1272 MIPS ELF specific function. */
1273 irix_compat_t (*elf_backend_mips_irix_compat
)
1276 reloc_howto_type
*(*elf_backend_mips_rtype_to_howto
)
1277 (unsigned int, bfd_boolean
);
1279 /* The swapping table to use when dealing with ECOFF information.
1280 Used for the MIPS ELF .mdebug section. */
1281 const struct ecoff_debug_swap
*elf_backend_ecoff_debug_swap
;
1283 /* This function implements `bfd_elf_bfd_from_remote_memory';
1284 see elf.c, elfcode.h. */
1285 bfd
*(*elf_backend_bfd_from_remote_memory
)
1286 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
1287 int (*target_read_memory
) (bfd_vma vma
, bfd_byte
*myaddr
,
1288 bfd_size_type len
));
1290 /* This function is used by `_bfd_elf_get_synthetic_symtab';
1292 bfd_vma (*plt_sym_val
) (bfd_vma
, const asection
*, const arelent
*);
1294 /* Is symbol defined in common section? */
1295 bfd_boolean (*common_definition
) (Elf_Internal_Sym
*);
1297 /* Return a common section index for section. */
1298 unsigned int (*common_section_index
) (asection
*);
1300 /* Return a common section for section. */
1301 asection
*(*common_section
) (asection
*);
1303 /* Return TRUE if we can merge 2 definitions. */
1304 bfd_boolean (*merge_symbol
) (struct elf_link_hash_entry
*,
1305 const Elf_Internal_Sym
*, asection
**,
1306 bfd_boolean
, bfd_boolean
,
1307 bfd
*, const asection
*);
1309 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
1310 bfd_boolean (*elf_hash_symbol
) (struct elf_link_hash_entry
*);
1312 /* Return TRUE if type is a function symbol type. */
1313 bfd_boolean (*is_function_type
) (unsigned int type
);
1315 /* If the ELF symbol SYM might be a function in SEC, return the
1316 function size and set *CODE_OFF to the function's entry point,
1317 otherwise return zero. */
1318 bfd_size_type (*maybe_function_sym
) (const asymbol
*sym
, asection
*sec
,
1321 /* Return the section which RELOC_SEC applies to. */
1322 asection
*(*get_reloc_section
) (asection
*reloc_sec
);
1324 /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
1325 has a type >= SHT_LOOS. Returns TRUE if the fields were initialised,
1326 FALSE otherwise. Can be called multiple times for a given section,
1327 until it returns TRUE. Most of the times it is called ISECTION will be
1328 set to an input section that might be associated with the output section.
1329 The last time that it is called, ISECTION will be set to NULL. */
1330 bfd_boolean (*elf_backend_copy_special_section_fields
)
1331 (const bfd
*ibfd
, bfd
*obfd
, const Elf_Internal_Shdr
*isection
,
1332 Elf_Internal_Shdr
*osection
);
1334 /* Used to handle bad SHF_LINK_ORDER input. */
1335 void (*link_order_error_handler
) (const char *, ...);
1337 /* Name of the PLT relocation section. */
1338 const char *relplt_name
;
1340 /* Alternate EM_xxxx machine codes for this backend. */
1341 int elf_machine_alt1
;
1342 int elf_machine_alt2
;
1344 const struct elf_size_info
*s
;
1346 /* An array of target specific special sections. */
1347 const struct bfd_elf_special_section
*special_sections
;
1349 /* The size in bytes of the header for the GOT. This includes the
1350 so-called reserved entries on some systems. */
1351 bfd_vma got_header_size
;
1353 /* The size of the GOT entry for the symbol pointed to by H if non-NULL,
1354 otherwise by the local symbol with index SYMNDX in IBFD. */
1355 bfd_vma (*got_elt_size
) (bfd
*, struct bfd_link_info
*,
1356 struct elf_link_hash_entry
*h
,
1357 bfd
*ibfd
, unsigned long symndx
);
1359 /* The vendor name to use for a processor-standard attributes section. */
1360 const char *obj_attrs_vendor
;
1362 /* The section name to use for a processor-standard attributes section. */
1363 const char *obj_attrs_section
;
1365 /* Return 1, 2 or 3 to indicate what type of arguments a
1366 processor-specific tag takes. */
1367 int (*obj_attrs_arg_type
) (int);
1369 /* The section type to use for an attributes section. */
1370 unsigned int obj_attrs_section_type
;
1372 /* This function determines the order in which any attributes are
1373 written. It must be defined for input in the range
1374 LEAST_KNOWN_OBJ_ATTRIBUTE..NUM_KNOWN_OBJ_ATTRIBUTES-1 (this range
1375 is used in order to make unity easy). The returned value is the
1376 actual tag number to place in the input position. */
1377 int (*obj_attrs_order
) (int);
1379 /* Handle merging unknown attributes; either warn and return TRUE,
1380 or give an error and return FALSE. */
1381 bfd_boolean (*obj_attrs_handle_unknown
) (bfd
*, int);
1383 /* Encoding used for compact EH tables. */
1384 int (*compact_eh_encoding
) (struct bfd_link_info
*);
1386 /* Opcode representing no unwind. */
1387 int (*cant_unwind_opcode
) (struct bfd_link_info
*);
1389 /* This is non-zero if static TLS segments require a special alignment. */
1390 unsigned static_tls_alignment
;
1392 /* Alignment for the PT_GNU_STACK segment. */
1393 unsigned stack_align
;
1395 /* Flag bits to assign to a section of type SHT_STRTAB. */
1396 unsigned long elf_strtab_flags
;
1398 /* This is TRUE if the linker should act like collect and gather
1399 global constructors and destructors by name. This is TRUE for
1400 MIPS ELF because the Irix 5 tools can not handle the .init
1402 unsigned collect
: 1;
1404 /* This is TRUE if the linker should ignore changes to the type of a
1405 symbol. This is TRUE for MIPS ELF because some Irix 5 objects
1406 record undefined functions as STT_OBJECT although the definitions
1408 unsigned type_change_ok
: 1;
1410 /* Whether the backend may use REL relocations. (Some backends use
1411 both REL and RELA relocations, and this flag is set for those
1413 unsigned may_use_rel_p
: 1;
1415 /* Whether the backend may use RELA relocations. (Some backends use
1416 both REL and RELA relocations, and this flag is set for those
1418 unsigned may_use_rela_p
: 1;
1420 /* Whether the default relocation type is RELA. If a backend with
1421 this flag set wants REL relocations for a particular section,
1422 it must note that explicitly. Similarly, if this flag is clear,
1423 and the backend wants RELA relocations for a particular
1425 unsigned default_use_rela_p
: 1;
1427 /* True if PLT and copy relocations should be RELA by default. */
1428 unsigned rela_plts_and_copies_p
: 1;
1430 /* Set if RELA relocations for a relocatable link can be handled by
1431 generic code. Backends that set this flag need do nothing in the
1432 backend relocate_section routine for relocatable linking. */
1433 unsigned rela_normal
: 1;
1435 /* Set if DT_REL/DT_RELA/DT_RELSZ/DT_RELASZ should not include PLT
1437 unsigned dtrel_excludes_plt
: 1;
1439 /* TRUE if addresses "naturally" sign extend. This is used when
1440 swapping in from Elf32 when BFD64. */
1441 unsigned sign_extend_vma
: 1;
1443 unsigned want_got_plt
: 1;
1444 unsigned plt_readonly
: 1;
1445 unsigned want_plt_sym
: 1;
1446 unsigned plt_not_loaded
: 1;
1447 unsigned plt_alignment
: 4;
1448 unsigned can_gc_sections
: 1;
1449 unsigned can_refcount
: 1;
1450 unsigned want_got_sym
: 1;
1451 unsigned want_dynbss
: 1;
1453 /* Targets which do not support physical addressing often require
1454 that the p_paddr field in the section header to be set to zero.
1455 This field indicates whether this behavior is required. */
1456 unsigned want_p_paddr_set_to_zero
: 1;
1458 /* True if an object file lacking a .note.GNU-stack section
1459 should be assumed to be requesting exec stack. At least one
1460 other file in the link needs to have a .note.GNU-stack section
1461 for a PT_GNU_STACK segment to be created. */
1462 unsigned default_execstack
: 1;
1464 /* True if elf_section_data(sec)->this_hdr.contents is sec->rawsize
1465 in length rather than sec->size in length, if sec->rawsize is
1466 non-zero and smaller than sec->size. */
1467 unsigned caches_rawsize
: 1;
1469 /* Address of protected data defined in the shared library may be
1470 external, i.e., due to copy relocation. */
1471 unsigned extern_protected_data
: 1;
1474 /* Information about reloc sections associated with a bfd_elf_section_data
1476 struct bfd_elf_section_reloc_data
1478 /* The ELF header for the reloc section associated with this
1480 Elf_Internal_Shdr
*hdr
;
1481 /* The number of relocations currently assigned to HDR. */
1483 /* The ELF section number of the reloc section. Only used for an
1486 /* Used by the backend linker to store the symbol hash table entries
1487 associated with relocs against global symbols. */
1488 struct elf_link_hash_entry
**hashes
;
1491 /* Information stored for each BFD section in an ELF file. This
1492 structure is allocated by elf_new_section_hook. */
1494 struct bfd_elf_section_data
1496 /* The ELF header for this section. */
1497 Elf_Internal_Shdr this_hdr
;
1499 /* INPUT_SECTION_FLAGS if specified in the linker script. */
1500 struct flag_info
*section_flag_info
;
1502 /* Information about the REL and RELA reloc sections associated
1503 with this section, if any. */
1504 struct bfd_elf_section_reloc_data rel
, rela
;
1506 /* The ELF section number of this section. */
1509 /* Used by the backend linker when generating a shared library to
1510 record the dynamic symbol index for a section symbol
1511 corresponding to this section. A value of 0 means that there is
1512 no dynamic symbol for this section. */
1515 /* A pointer to the linked-to section for SHF_LINK_ORDER. */
1516 asection
*linked_to
;
1518 /* A pointer to the swapped relocs. If the section uses REL relocs,
1519 rather than RELA, all the r_addend fields will be zero. This
1520 pointer may be NULL. It is used by the backend linker. */
1521 Elf_Internal_Rela
*relocs
;
1523 /* A pointer to a linked list tracking dynamic relocs copied for
1527 /* A pointer to the bfd section used for dynamic relocs. */
1531 /* Group name, if this section is a member of a group. */
1534 /* Group signature sym, if this is the SHT_GROUP section. */
1535 struct bfd_symbol
*id
;
1538 /* For a member of a group, points to the SHT_GROUP section.
1539 NULL for the SHT_GROUP section itself and non-group sections. */
1540 asection
*sec_group
;
1542 /* A linked list of member sections in the group. Circular when used by
1543 the linker. For the SHT_GROUP section, points at first member. */
1544 asection
*next_in_group
;
1546 /* The FDEs associated with this section. The u.fde.next_in_section
1547 field acts as a chain pointer. */
1548 struct eh_cie_fde
*fde_list
;
1550 /* Link from a text section to its .eh_frame_entry section. */
1551 asection
*eh_frame_entry
;
1553 /* A pointer used for various section optimizations. */
1557 #define elf_section_data(sec) ((struct bfd_elf_section_data*)(sec)->used_by_bfd)
1558 #define elf_linked_to_section(sec) (elf_section_data(sec)->linked_to)
1559 #define elf_section_type(sec) (elf_section_data(sec)->this_hdr.sh_type)
1560 #define elf_section_flags(sec) (elf_section_data(sec)->this_hdr.sh_flags)
1561 #define elf_group_name(sec) (elf_section_data(sec)->group.name)
1562 #define elf_group_id(sec) (elf_section_data(sec)->group.id)
1563 #define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group)
1564 #define elf_fde_list(sec) (elf_section_data(sec)->fde_list)
1565 #define elf_sec_group(sec) (elf_section_data(sec)->sec_group)
1566 #define elf_section_eh_frame_entry(sec) (elf_section_data(sec)->eh_frame_entry)
1568 #define xvec_get_elf_backend_data(xvec) \
1569 ((const struct elf_backend_data *) (xvec)->backend_data)
1571 #define get_elf_backend_data(abfd) \
1572 xvec_get_elf_backend_data ((abfd)->xvec)
1574 /* The least object attributes (within an attributes subsection) known
1575 for any target. Some code assumes that the value 0 is not used and
1576 the field for that attribute can instead be used as a marker to
1577 indicate that attributes have been initialized. */
1578 #define LEAST_KNOWN_OBJ_ATTRIBUTE 2
1580 /* The maximum number of known object attributes for any target. */
1581 #define NUM_KNOWN_OBJ_ATTRIBUTES 71
1583 /* The value of an object attribute. The type indicates whether the attribute
1584 holds and integer, a string, or both. It can also indicate that there can
1585 be no default (i.e. all values must be written to file, even zero). */
1587 typedef struct obj_attribute
1589 #define ATTR_TYPE_FLAG_INT_VAL (1 << 0)
1590 #define ATTR_TYPE_FLAG_STR_VAL (1 << 1)
1591 #define ATTR_TYPE_FLAG_NO_DEFAULT (1 << 2)
1593 #define ATTR_TYPE_HAS_INT_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_INT_VAL)
1594 #define ATTR_TYPE_HAS_STR_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_STR_VAL)
1595 #define ATTR_TYPE_HAS_NO_DEFAULT(TYPE) ((TYPE) & ATTR_TYPE_FLAG_NO_DEFAULT)
1602 typedef struct obj_attribute_list
1604 struct obj_attribute_list
*next
;
1607 } obj_attribute_list
;
1609 /* Object attributes may either be defined by the processor ABI, index
1610 OBJ_ATTR_PROC in the *_obj_attributes arrays, or be GNU-specific
1611 (and possibly also processor-specific), index OBJ_ATTR_GNU. */
1612 #define OBJ_ATTR_PROC 0
1613 #define OBJ_ATTR_GNU 1
1614 #define OBJ_ATTR_FIRST OBJ_ATTR_PROC
1615 #define OBJ_ATTR_LAST OBJ_ATTR_GNU
1617 /* The following object attribute tags are taken as generic, for all
1618 targets and for "gnu" where there is no target standard. */
1625 Tag_compatibility
= 32
1628 /* The following struct stores information about every SystemTap section
1629 found in the object file. */
1632 struct sdt_note
*next
;
1637 /* tdata information grabbed from an elf core file. */
1638 struct core_elf_obj_tdata
1647 /* Extra tdata information held for output ELF BFDs. */
1648 struct output_elf_obj_tdata
1650 struct elf_segment_map
*seg_map
;
1651 struct elf_strtab_hash
*strtab_ptr
;
1653 /* STT_SECTION symbols for each section */
1654 asymbol
**section_syms
;
1656 /* Used to determine if PT_GNU_EH_FRAME segment header should be
1658 asection
*eh_frame_hdr
;
1660 /* NT_GNU_BUILD_ID note type info. */
1663 bfd_boolean (*after_write_object_contents
) (bfd
*);
1668 /* Records the result of `get_program_header_size'. */
1669 bfd_size_type program_header_size
;
1671 /* Used when laying out sections. */
1672 file_ptr next_file_pos
;
1674 int num_section_syms
;
1675 unsigned int shstrtab_section
, strtab_section
;
1677 /* Segment flags for the PT_GNU_STACK segment. */
1678 unsigned int stack_flags
;
1680 /* This is set to TRUE if the object was created by the backend
1684 /* Used to determine if the e_flags field has been initialized */
1685 bfd_boolean flags_init
;
1688 /* Indicate if the bfd contains symbols that have the STT_GNU_IFUNC
1689 symbol type or STB_GNU_UNIQUE binding. Used to set the osabi
1690 field in the ELF header structure. */
1691 enum elf_gnu_symbols
1693 elf_gnu_symbol_none
= 0,
1694 elf_gnu_symbol_any
= 1 << 0,
1695 elf_gnu_symbol_ifunc
= (elf_gnu_symbol_any
| 1 << 1),
1696 elf_gnu_symbol_unique
= (elf_gnu_symbol_any
| 1 << 2),
1697 elf_gnu_symbol_all
= (elf_gnu_symbol_ifunc
| elf_gnu_symbol_unique
)
1700 typedef struct elf_section_list
1702 Elf_Internal_Shdr hdr
;
1704 struct elf_section_list
* next
;
1707 /* Some private data is stashed away for future use using the tdata pointer
1708 in the bfd structure. */
1710 struct elf_obj_tdata
1712 Elf_Internal_Ehdr elf_header
[1]; /* Actual data, but ref like ptr */
1713 Elf_Internal_Shdr
**elf_sect_ptr
;
1714 Elf_Internal_Phdr
*phdr
;
1715 Elf_Internal_Shdr symtab_hdr
;
1716 Elf_Internal_Shdr shstrtab_hdr
;
1717 Elf_Internal_Shdr strtab_hdr
;
1718 Elf_Internal_Shdr dynsymtab_hdr
;
1719 Elf_Internal_Shdr dynstrtab_hdr
;
1720 Elf_Internal_Shdr dynversym_hdr
;
1721 Elf_Internal_Shdr dynverref_hdr
;
1722 Elf_Internal_Shdr dynverdef_hdr
;
1723 elf_section_list
* symtab_shndx_list
;
1724 bfd_vma gp
; /* The gp value */
1725 unsigned int gp_size
; /* The gp size */
1726 unsigned int num_elf_sections
; /* elf_sect_ptr size */
1728 /* A mapping from external symbols to entries in the linker hash
1729 table, used when linking. This is indexed by the symbol index
1730 minus the sh_info field of the symbol table header. */
1731 struct elf_link_hash_entry
**sym_hashes
;
1733 /* Track usage and final offsets of GOT entries for local symbols.
1734 This array is indexed by symbol index. Elements are used
1735 identically to "got" in struct elf_link_hash_entry. */
1738 bfd_signed_vma
*refcounts
;
1740 struct got_entry
**ents
;
1743 /* The linker ELF emulation code needs to let the backend ELF linker
1744 know what filename should be used for a dynamic object if the
1745 dynamic object is found using a search. The emulation code then
1746 sometimes needs to know what name was actually used. Until the
1747 file has been added to the linker symbol table, this field holds
1748 the name the linker wants. After it has been added, it holds the
1749 name actually used, which will be the DT_SONAME entry if there is
1751 const char *dt_name
;
1753 /* The linker emulation needs to know what audit libs
1754 are used by a dynamic object. */
1755 const char *dt_audit
;
1757 /* Used by find_nearest_line entry point. */
1760 /* A place to stash dwarf1 info for this bfd. */
1761 struct dwarf1_debug
*dwarf1_find_line_info
;
1763 /* A place to stash dwarf2 info for this bfd. */
1764 void *dwarf2_find_line_info
;
1766 /* Stash away info for yet another find line/function variant. */
1767 void *elf_find_function_cache
;
1769 /* Number of symbol version definitions we are about to emit. */
1770 unsigned int cverdefs
;
1772 /* Number of symbol version references we are about to emit. */
1773 unsigned int cverrefs
;
1775 /* Symbol version definitions in external objects. */
1776 Elf_Internal_Verdef
*verdef
;
1778 /* Symbol version references to external objects. */
1779 Elf_Internal_Verneed
*verref
;
1781 /* A pointer to the .eh_frame section. */
1782 asection
*eh_frame_section
;
1784 /* Symbol buffer. */
1787 obj_attribute known_obj_attributes
[2][NUM_KNOWN_OBJ_ATTRIBUTES
];
1788 obj_attribute_list
*other_obj_attributes
[2];
1790 /* Linked-list containing information about every Systemtap section
1791 found in the object file. Each section corresponds to one entry
1793 struct sdt_note
*sdt_note_head
;
1795 Elf_Internal_Shdr
**group_sect_ptr
;
1798 unsigned int symtab_section
, dynsymtab_section
;
1799 unsigned int dynversym_section
, dynverdef_section
, dynverref_section
;
1801 /* An identifier used to distinguish different target
1802 specific extensions to this structure. */
1803 enum elf_target_id object_id
;
1805 /* Whether a dyanmic object was specified normally on the linker
1806 command line, or was specified when --as-needed was in effect,
1807 or was found via a DT_NEEDED entry. */
1808 enum dynamic_lib_link_class dyn_lib_class
;
1810 /* Irix 5 often screws up the symbol table, sorting local symbols
1811 after global symbols. This flag is set if the symbol table in
1812 this BFD appears to be screwed up. If it is, we ignore the
1813 sh_info field in the symbol table header, and always read all the
1815 bfd_boolean bad_symtab
;
1817 enum elf_gnu_symbols has_gnu_symbols
;
1819 /* Information grabbed from an elf core file. */
1820 struct core_elf_obj_tdata
*core
;
1822 /* More information held for output ELF BFDs. */
1823 struct output_elf_obj_tdata
*o
;
1826 #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
1828 #define elf_object_id(bfd) (elf_tdata(bfd) -> object_id)
1829 #define elf_program_header_size(bfd) (elf_tdata(bfd) -> o->program_header_size)
1830 #define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header)
1831 #define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr)
1832 #define elf_numsections(bfd) (elf_tdata(bfd) -> num_elf_sections)
1833 #define elf_seg_map(bfd) (elf_tdata(bfd) -> o->seg_map)
1834 #define elf_next_file_pos(bfd) (elf_tdata(bfd) -> o->next_file_pos)
1835 #define elf_eh_frame_hdr(bfd) (elf_tdata(bfd) -> o->eh_frame_hdr)
1836 #define elf_linker(bfd) (elf_tdata(bfd) -> o->linker)
1837 #define elf_stack_flags(bfd) (elf_tdata(bfd) -> o->stack_flags)
1838 #define elf_shstrtab(bfd) (elf_tdata(bfd) -> o->strtab_ptr)
1839 #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section)
1840 #define elf_symtab_shndx_list(bfd) (elf_tdata(bfd) -> symtab_shndx_list)
1841 #define elf_strtab_sec(bfd) (elf_tdata(bfd) -> o->strtab_section)
1842 #define elf_shstrtab_sec(bfd) (elf_tdata(bfd) -> o->shstrtab_section)
1843 #define elf_symtab_hdr(bfd) (elf_tdata(bfd) -> symtab_hdr)
1844 #define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section)
1845 #define elf_dynversym(bfd) (elf_tdata(bfd) -> dynversym_section)
1846 #define elf_dynverdef(bfd) (elf_tdata(bfd) -> dynverdef_section)
1847 #define elf_dynverref(bfd) (elf_tdata(bfd) -> dynverref_section)
1848 #define elf_eh_frame_section(bfd) \
1849 (elf_tdata(bfd) -> eh_frame_section)
1850 #define elf_section_syms(bfd) (elf_tdata(bfd) -> o->section_syms)
1851 #define elf_num_section_syms(bfd) (elf_tdata(bfd) -> o->num_section_syms)
1852 #define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
1853 #define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
1854 #define elf_gp(bfd) (elf_tdata(bfd) -> gp)
1855 #define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size)
1856 #define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes)
1857 #define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts)
1858 #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets)
1859 #define elf_local_got_ents(bfd) (elf_tdata(bfd) -> local_got.ents)
1860 #define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name)
1861 #define elf_dt_audit(bfd) (elf_tdata(bfd) -> dt_audit)
1862 #define elf_dyn_lib_class(bfd) (elf_tdata(bfd) -> dyn_lib_class)
1863 #define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab)
1864 #define elf_flags_init(bfd) (elf_tdata(bfd) -> o->flags_init)
1865 #define elf_known_obj_attributes(bfd) (elf_tdata (bfd) -> known_obj_attributes)
1866 #define elf_other_obj_attributes(bfd) (elf_tdata (bfd) -> other_obj_attributes)
1867 #define elf_known_obj_attributes_proc(bfd) \
1868 (elf_known_obj_attributes (bfd) [OBJ_ATTR_PROC])
1869 #define elf_other_obj_attributes_proc(bfd) \
1870 (elf_other_obj_attributes (bfd) [OBJ_ATTR_PROC])
1872 extern void _bfd_elf_swap_verdef_in
1873 (bfd
*, const Elf_External_Verdef
*, Elf_Internal_Verdef
*);
1874 extern void _bfd_elf_swap_verdef_out
1875 (bfd
*, const Elf_Internal_Verdef
*, Elf_External_Verdef
*);
1876 extern void _bfd_elf_swap_verdaux_in
1877 (bfd
*, const Elf_External_Verdaux
*, Elf_Internal_Verdaux
*);
1878 extern void _bfd_elf_swap_verdaux_out
1879 (bfd
*, const Elf_Internal_Verdaux
*, Elf_External_Verdaux
*);
1880 extern void _bfd_elf_swap_verneed_in
1881 (bfd
*, const Elf_External_Verneed
*, Elf_Internal_Verneed
*);
1882 extern void _bfd_elf_swap_verneed_out
1883 (bfd
*, const Elf_Internal_Verneed
*, Elf_External_Verneed
*);
1884 extern void _bfd_elf_swap_vernaux_in
1885 (bfd
*, const Elf_External_Vernaux
*, Elf_Internal_Vernaux
*);
1886 extern void _bfd_elf_swap_vernaux_out
1887 (bfd
*, const Elf_Internal_Vernaux
*, Elf_External_Vernaux
*);
1888 extern void _bfd_elf_swap_versym_in
1889 (bfd
*, const Elf_External_Versym
*, Elf_Internal_Versym
*);
1890 extern void _bfd_elf_swap_versym_out
1891 (bfd
*, const Elf_Internal_Versym
*, Elf_External_Versym
*);
1893 extern unsigned int _bfd_elf_section_from_bfd_section
1894 (bfd
*, asection
*);
1895 extern char *bfd_elf_string_from_elf_section
1896 (bfd
*, unsigned, unsigned);
1897 extern Elf_Internal_Sym
*bfd_elf_get_elf_syms
1898 (bfd
*, Elf_Internal_Shdr
*, size_t, size_t, Elf_Internal_Sym
*, void *,
1899 Elf_External_Sym_Shndx
*);
1900 extern const char *bfd_elf_sym_name
1901 (bfd
*, Elf_Internal_Shdr
*, Elf_Internal_Sym
*, asection
*);
1903 extern bfd_boolean _bfd_elf_copy_private_bfd_data
1905 extern bfd_boolean _bfd_elf_print_private_bfd_data
1907 const char * _bfd_elf_get_symbol_version_string
1908 (bfd
*, asymbol
*, bfd_boolean
*);
1909 extern void bfd_elf_print_symbol
1910 (bfd
*, void *, asymbol
*, bfd_print_symbol_type
);
1912 extern unsigned int _bfd_elf_eh_frame_address_size
1913 (bfd
*, asection
*);
1914 extern bfd_byte _bfd_elf_encode_eh_address
1915 (bfd
*abfd
, struct bfd_link_info
*info
, asection
*osec
, bfd_vma offset
,
1916 asection
*loc_sec
, bfd_vma loc_offset
, bfd_vma
*encoded
);
1917 extern bfd_boolean _bfd_elf_can_make_relative
1918 (bfd
*input_bfd
, struct bfd_link_info
*info
, asection
*eh_frame_section
);
1920 extern enum elf_reloc_type_class _bfd_elf_reloc_type_class
1921 (const struct bfd_link_info
*, const asection
*,
1922 const Elf_Internal_Rela
*);
1923 extern bfd_vma _bfd_elf_rela_local_sym
1924 (bfd
*, Elf_Internal_Sym
*, asection
**, Elf_Internal_Rela
*);
1925 extern bfd_vma _bfd_elf_rel_local_sym
1926 (bfd
*, Elf_Internal_Sym
*, asection
**, bfd_vma
);
1927 extern bfd_vma _bfd_elf_section_offset
1928 (bfd
*, struct bfd_link_info
*, asection
*, bfd_vma
);
1930 extern unsigned long bfd_elf_hash
1932 extern unsigned long bfd_elf_gnu_hash
1935 extern bfd_reloc_status_type bfd_elf_generic_reloc
1936 (bfd
*, arelent
*, asymbol
*, void *, asection
*, bfd
*, char **);
1937 extern bfd_boolean bfd_elf_allocate_object
1938 (bfd
*, size_t, enum elf_target_id
);
1939 extern bfd_boolean bfd_elf_make_object
1941 extern bfd_boolean bfd_elf_mkcorefile
1943 extern bfd_boolean _bfd_elf_make_section_from_shdr
1944 (bfd
*, Elf_Internal_Shdr
*, const char *, int);
1945 extern bfd_boolean _bfd_elf_make_section_from_phdr
1946 (bfd
*, Elf_Internal_Phdr
*, int, const char *);
1947 extern struct bfd_hash_entry
*_bfd_elf_link_hash_newfunc
1948 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *);
1949 extern struct bfd_link_hash_table
*_bfd_elf_link_hash_table_create
1951 extern void _bfd_elf_link_hash_table_free
1953 extern void _bfd_elf_link_hash_copy_indirect
1954 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
1955 struct elf_link_hash_entry
*);
1956 extern void _bfd_elf_link_hash_hide_symbol
1957 (struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd_boolean
);
1958 extern bfd_boolean _bfd_elf_link_hash_fixup_symbol
1959 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
1960 extern bfd_boolean _bfd_elf_link_hash_table_init
1961 (struct elf_link_hash_table
*, bfd
*,
1962 struct bfd_hash_entry
*(*)
1963 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *),
1964 unsigned int, enum elf_target_id
);
1965 extern bfd_boolean _bfd_elf_slurp_version_tables
1966 (bfd
*, bfd_boolean
);
1967 extern bfd_boolean _bfd_elf_merge_sections
1968 (bfd
*, struct bfd_link_info
*);
1969 extern bfd_boolean _bfd_elf_match_sections_by_type
1970 (bfd
*, const asection
*, bfd
*, const asection
*);
1971 extern bfd_boolean bfd_elf_is_group_section
1972 (bfd
*, const struct bfd_section
*);
1973 extern bfd_boolean _bfd_elf_section_already_linked
1974 (bfd
*, asection
*, struct bfd_link_info
*);
1975 extern void bfd_elf_set_group_contents
1976 (bfd
*, asection
*, void *);
1977 extern unsigned int _bfd_elf_filter_global_symbols
1978 (bfd
*, struct bfd_link_info
*, asymbol
**, long);
1979 extern asection
*_bfd_elf_check_kept_section
1980 (asection
*, struct bfd_link_info
*);
1981 #define _bfd_elf_link_just_syms _bfd_generic_link_just_syms
1982 extern void _bfd_elf_copy_link_hash_symbol_type
1983 (bfd
*, struct bfd_link_hash_entry
*, struct bfd_link_hash_entry
*);
1984 extern bfd_boolean _bfd_elf_size_group_sections
1985 (struct bfd_link_info
*);
1986 extern bfd_boolean _bfd_elf_fixup_group_sections
1987 (bfd
*, asection
*);
1988 extern bfd_boolean _bfd_elf_copy_private_header_data
1990 extern bfd_boolean _bfd_elf_copy_private_symbol_data
1991 (bfd
*, asymbol
*, bfd
*, asymbol
*);
1992 #define _bfd_generic_init_private_section_data \
1993 _bfd_elf_init_private_section_data
1994 extern bfd_boolean _bfd_elf_init_private_section_data
1995 (bfd
*, asection
*, bfd
*, asection
*, struct bfd_link_info
*);
1996 extern bfd_boolean _bfd_elf_copy_private_section_data
1997 (bfd
*, asection
*, bfd
*, asection
*);
1998 extern bfd_boolean _bfd_elf_write_object_contents
2000 extern bfd_boolean _bfd_elf_write_corefile_contents
2002 extern bfd_boolean _bfd_elf_set_section_contents
2003 (bfd
*, sec_ptr
, const void *, file_ptr
, bfd_size_type
);
2004 extern long _bfd_elf_get_symtab_upper_bound
2006 extern long _bfd_elf_canonicalize_symtab
2007 (bfd
*, asymbol
**);
2008 extern long _bfd_elf_get_dynamic_symtab_upper_bound
2010 extern long _bfd_elf_canonicalize_dynamic_symtab
2011 (bfd
*, asymbol
**);
2012 extern long _bfd_elf_get_synthetic_symtab
2013 (bfd
*, long, asymbol
**, long, asymbol
**, asymbol
**);
2014 extern long _bfd_elf_get_reloc_upper_bound
2016 extern long _bfd_elf_canonicalize_reloc
2017 (bfd
*, sec_ptr
, arelent
**, asymbol
**);
2018 extern asection
* _bfd_elf_get_dynamic_reloc_section
2019 (bfd
*, asection
*, bfd_boolean
);
2020 extern asection
* _bfd_elf_make_dynamic_reloc_section
2021 (asection
*, bfd
*, unsigned int, bfd
*, bfd_boolean
);
2022 extern long _bfd_elf_get_dynamic_reloc_upper_bound
2024 extern long _bfd_elf_canonicalize_dynamic_reloc
2025 (bfd
*, arelent
**, asymbol
**);
2026 extern asymbol
*_bfd_elf_make_empty_symbol
2028 extern void _bfd_elf_get_symbol_info
2029 (bfd
*, asymbol
*, symbol_info
*);
2030 extern bfd_boolean _bfd_elf_is_local_label_name
2031 (bfd
*, const char *);
2032 extern alent
*_bfd_elf_get_lineno
2034 extern bfd_boolean _bfd_elf_set_arch_mach
2035 (bfd
*, enum bfd_architecture
, unsigned long);
2036 extern bfd_boolean _bfd_elf_find_nearest_line
2037 (bfd
*, asymbol
**, asection
*, bfd_vma
,
2038 const char **, const char **, unsigned int *, unsigned int *);
2039 extern bfd_boolean _bfd_elf_find_line
2040 (bfd
*, asymbol
**, asymbol
*, const char **, unsigned int *);
2041 extern bfd_boolean _bfd_elf_find_inliner_info
2042 (bfd
*, const char **, const char **, unsigned int *);
2043 extern asymbol
*_bfd_elf_find_function
2044 (bfd
*, asymbol
**, asection
*, bfd_vma
, const char **, const char **);
2045 #define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols
2046 #define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
2047 extern int _bfd_elf_sizeof_headers
2048 (bfd
*, struct bfd_link_info
*);
2049 extern bfd_boolean _bfd_elf_new_section_hook
2050 (bfd
*, asection
*);
2051 extern const struct bfd_elf_special_section
*_bfd_elf_get_special_section
2052 (const char *, const struct bfd_elf_special_section
*, unsigned int);
2053 extern const struct bfd_elf_special_section
*_bfd_elf_get_sec_type_attr
2054 (bfd
*, asection
*);
2056 /* If the target doesn't have reloc handling written yet: */
2057 extern void _bfd_elf_no_info_to_howto
2058 (bfd
*, arelent
*, Elf_Internal_Rela
*);
2060 extern bfd_boolean bfd_section_from_shdr
2061 (bfd
*, unsigned int shindex
);
2062 extern bfd_boolean bfd_section_from_phdr
2063 (bfd
*, Elf_Internal_Phdr
*, int);
2065 extern int _bfd_elf_symbol_from_bfd_symbol
2066 (bfd
*, asymbol
**);
2068 extern Elf_Internal_Sym
*bfd_sym_from_r_symndx
2069 (struct sym_cache
*, bfd
*, unsigned long);
2070 extern asection
*bfd_section_from_elf_index
2071 (bfd
*, unsigned int);
2073 extern struct elf_strtab_hash
* _bfd_elf_strtab_init
2075 extern void _bfd_elf_strtab_free
2076 (struct elf_strtab_hash
*);
2077 extern size_t _bfd_elf_strtab_add
2078 (struct elf_strtab_hash
*, const char *, bfd_boolean
);
2079 extern void _bfd_elf_strtab_addref
2080 (struct elf_strtab_hash
*, size_t);
2081 extern void _bfd_elf_strtab_delref
2082 (struct elf_strtab_hash
*, size_t);
2083 extern unsigned int _bfd_elf_strtab_refcount
2084 (struct elf_strtab_hash
*, size_t);
2085 extern void _bfd_elf_strtab_clear_all_refs
2086 (struct elf_strtab_hash
*);
2087 extern void *_bfd_elf_strtab_save
2088 (struct elf_strtab_hash
*);
2089 extern void _bfd_elf_strtab_restore
2090 (struct elf_strtab_hash
*, void *);
2091 extern bfd_size_type _bfd_elf_strtab_size
2092 (struct elf_strtab_hash
*);
2093 extern bfd_size_type _bfd_elf_strtab_offset
2094 (struct elf_strtab_hash
*, size_t);
2095 extern bfd_boolean _bfd_elf_strtab_emit
2096 (bfd
*, struct elf_strtab_hash
*);
2097 extern void _bfd_elf_strtab_finalize
2098 (struct elf_strtab_hash
*);
2100 extern bfd_boolean bfd_elf_parse_eh_frame_entries
2101 (bfd
*, struct bfd_link_info
*);
2102 extern bfd_boolean _bfd_elf_parse_eh_frame_entry
2103 (struct bfd_link_info
*, asection
*, struct elf_reloc_cookie
*);
2104 extern void _bfd_elf_parse_eh_frame
2105 (bfd
*, struct bfd_link_info
*, asection
*, struct elf_reloc_cookie
*);
2106 extern bfd_boolean _bfd_elf_end_eh_frame_parsing
2107 (struct bfd_link_info
*info
);
2109 extern bfd_boolean _bfd_elf_discard_section_eh_frame
2110 (bfd
*, struct bfd_link_info
*, asection
*,
2111 bfd_boolean (*) (bfd_vma
, void *), struct elf_reloc_cookie
*);
2112 extern bfd_boolean _bfd_elf_discard_section_eh_frame_hdr
2113 (bfd
*, struct bfd_link_info
*);
2114 extern bfd_vma _bfd_elf_eh_frame_section_offset
2115 (bfd
*, struct bfd_link_info
*, asection
*, bfd_vma
);
2116 extern bfd_boolean _bfd_elf_write_section_eh_frame
2117 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
2118 bfd_boolean _bfd_elf_write_section_eh_frame_entry
2119 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
2120 extern bfd_boolean
_bfd_elf_fixup_eh_frame_hdr (struct bfd_link_info
*);
2121 extern bfd_boolean _bfd_elf_write_section_eh_frame_hdr
2122 (bfd
*, struct bfd_link_info
*);
2123 extern bfd_boolean _bfd_elf_eh_frame_present
2124 (struct bfd_link_info
*);
2125 extern bfd_boolean _bfd_elf_eh_frame_entry_present
2126 (struct bfd_link_info
*);
2127 extern bfd_boolean _bfd_elf_maybe_strip_eh_frame_hdr
2128 (struct bfd_link_info
*);
2130 extern bfd_boolean
_bfd_elf_hash_symbol (struct elf_link_hash_entry
*);
2132 extern long _bfd_elf_link_lookup_local_dynindx
2133 (struct bfd_link_info
*, bfd
*, long);
2134 extern bfd_boolean _bfd_elf_compute_section_file_positions
2135 (bfd
*, struct bfd_link_info
*);
2136 extern file_ptr _bfd_elf_assign_file_position_for_section
2137 (Elf_Internal_Shdr
*, file_ptr
, bfd_boolean
);
2139 extern bfd_boolean _bfd_elf_validate_reloc
2142 extern bfd_boolean _bfd_elf_link_create_dynamic_sections
2143 (bfd
*, struct bfd_link_info
*);
2144 extern bfd_boolean _bfd_elf_link_omit_section_dynsym
2145 (bfd
*, struct bfd_link_info
*, asection
*);
2146 extern bfd_boolean _bfd_elf_create_dynamic_sections
2147 (bfd
*, struct bfd_link_info
*);
2148 extern bfd_boolean _bfd_elf_create_got_section
2149 (bfd
*, struct bfd_link_info
*);
2150 extern asection
*_bfd_elf_section_for_symbol
2151 (struct elf_reloc_cookie
*, unsigned long, bfd_boolean
);
2152 extern struct elf_link_hash_entry
*_bfd_elf_define_linkage_sym
2153 (bfd
*, struct bfd_link_info
*, asection
*, const char *);
2154 extern void _bfd_elf_init_1_index_section
2155 (bfd
*, struct bfd_link_info
*);
2156 extern void _bfd_elf_init_2_index_sections
2157 (bfd
*, struct bfd_link_info
*);
2159 extern bfd_boolean _bfd_elfcore_make_pseudosection
2160 (bfd
*, char *, size_t, ufile_ptr
);
2161 extern char *_bfd_elfcore_strndup
2162 (bfd
*, char *, size_t);
2164 extern Elf_Internal_Rela
*_bfd_elf_link_read_relocs
2165 (bfd
*, asection
*, void *, Elf_Internal_Rela
*, bfd_boolean
);
2167 extern bfd_boolean _bfd_elf_link_output_relocs
2168 (bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*,
2169 struct elf_link_hash_entry
**);
2171 extern bfd_boolean _bfd_elf_adjust_dynamic_copy
2172 (struct bfd_link_info
*, struct elf_link_hash_entry
*, asection
*);
2174 extern bfd_boolean _bfd_elf_dynamic_symbol_p
2175 (struct elf_link_hash_entry
*, struct bfd_link_info
*, bfd_boolean
);
2177 extern bfd_boolean _bfd_elf_symbol_refs_local_p
2178 (struct elf_link_hash_entry
*, struct bfd_link_info
*, bfd_boolean
);
2180 extern bfd_reloc_status_type bfd_elf_perform_complex_relocation
2181 (bfd
*, asection
*, bfd_byte
*, Elf_Internal_Rela
*, bfd_vma
);
2183 extern bfd_boolean _bfd_elf_setup_sections
2186 extern void _bfd_elf_post_process_headers (bfd
* , struct bfd_link_info
*);
2188 extern const bfd_target
*bfd_elf32_object_p
2190 extern const bfd_target
*bfd_elf32_core_file_p
2192 extern char *bfd_elf32_core_file_failing_command
2194 extern int bfd_elf32_core_file_failing_signal
2196 extern bfd_boolean bfd_elf32_core_file_matches_executable_p
2198 extern int bfd_elf32_core_file_pid
2201 extern bfd_boolean bfd_elf32_swap_symbol_in
2202 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
2203 extern void bfd_elf32_swap_symbol_out
2204 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
2205 extern void bfd_elf32_swap_reloc_in
2206 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2207 extern void bfd_elf32_swap_reloc_out
2208 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2209 extern void bfd_elf32_swap_reloca_in
2210 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2211 extern void bfd_elf32_swap_reloca_out
2212 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2213 extern void bfd_elf32_swap_phdr_in
2214 (bfd
*, const Elf32_External_Phdr
*, Elf_Internal_Phdr
*);
2215 extern void bfd_elf32_swap_phdr_out
2216 (bfd
*, const Elf_Internal_Phdr
*, Elf32_External_Phdr
*);
2217 extern void bfd_elf32_swap_dyn_in
2218 (bfd
*, const void *, Elf_Internal_Dyn
*);
2219 extern void bfd_elf32_swap_dyn_out
2220 (bfd
*, const Elf_Internal_Dyn
*, void *);
2221 extern long bfd_elf32_slurp_symbol_table
2222 (bfd
*, asymbol
**, bfd_boolean
);
2223 extern bfd_boolean bfd_elf32_write_shdrs_and_ehdr
2225 extern int bfd_elf32_write_out_phdrs
2226 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
2227 extern bfd_boolean bfd_elf32_checksum_contents
2228 (bfd
* , void (*) (const void *, size_t, void *), void *);
2229 extern void bfd_elf32_write_relocs
2230 (bfd
*, asection
*, void *);
2231 extern bfd_boolean bfd_elf32_slurp_reloc_table
2232 (bfd
*, asection
*, asymbol
**, bfd_boolean
);
2234 extern const bfd_target
*bfd_elf64_object_p
2236 extern const bfd_target
*bfd_elf64_core_file_p
2238 extern char *bfd_elf64_core_file_failing_command
2240 extern int bfd_elf64_core_file_failing_signal
2242 extern bfd_boolean bfd_elf64_core_file_matches_executable_p
2244 extern int bfd_elf64_core_file_pid
2247 extern bfd_boolean bfd_elf64_swap_symbol_in
2248 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
2249 extern void bfd_elf64_swap_symbol_out
2250 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
2251 extern void bfd_elf64_swap_reloc_in
2252 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2253 extern void bfd_elf64_swap_reloc_out
2254 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2255 extern void bfd_elf64_swap_reloca_in
2256 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2257 extern void bfd_elf64_swap_reloca_out
2258 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2259 extern void bfd_elf64_swap_phdr_in
2260 (bfd
*, const Elf64_External_Phdr
*, Elf_Internal_Phdr
*);
2261 extern void bfd_elf64_swap_phdr_out
2262 (bfd
*, const Elf_Internal_Phdr
*, Elf64_External_Phdr
*);
2263 extern void bfd_elf64_swap_dyn_in
2264 (bfd
*, const void *, Elf_Internal_Dyn
*);
2265 extern void bfd_elf64_swap_dyn_out
2266 (bfd
*, const Elf_Internal_Dyn
*, void *);
2267 extern long bfd_elf64_slurp_symbol_table
2268 (bfd
*, asymbol
**, bfd_boolean
);
2269 extern bfd_boolean bfd_elf64_write_shdrs_and_ehdr
2271 extern int bfd_elf64_write_out_phdrs
2272 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
2273 extern bfd_boolean bfd_elf64_checksum_contents
2274 (bfd
* , void (*) (const void *, size_t, void *), void *);
2275 extern void bfd_elf64_write_relocs
2276 (bfd
*, asection
*, void *);
2277 extern bfd_boolean bfd_elf64_slurp_reloc_table
2278 (bfd
*, asection
*, asymbol
**, bfd_boolean
);
2280 extern bfd_boolean _bfd_elf_default_relocs_compatible
2281 (const bfd_target
*, const bfd_target
*);
2283 extern bfd_boolean _bfd_elf_relocs_compatible
2284 (const bfd_target
*, const bfd_target
*);
2285 extern bfd_boolean _bfd_elf_notice_as_needed
2286 (bfd
*, struct bfd_link_info
*, enum notice_asneeded_action
);
2288 extern struct elf_link_hash_entry
*_bfd_elf_archive_symbol_lookup
2289 (bfd
*, struct bfd_link_info
*, const char *);
2290 extern bfd_boolean bfd_elf_link_add_symbols
2291 (bfd
*, struct bfd_link_info
*);
2292 extern bfd_boolean _bfd_elf_add_dynamic_entry
2293 (struct bfd_link_info
*, bfd_vma
, bfd_vma
);
2294 extern bfd_boolean _bfd_elf_link_check_relocs
2295 (bfd
*, struct bfd_link_info
*);
2297 extern bfd_boolean bfd_elf_link_record_dynamic_symbol
2298 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
2300 extern int bfd_elf_link_record_local_dynamic_symbol
2301 (struct bfd_link_info
*, bfd
*, long);
2303 extern bfd_boolean _bfd_elf_close_and_cleanup
2306 extern bfd_boolean _bfd_elf_common_definition
2307 (Elf_Internal_Sym
*);
2309 extern unsigned int _bfd_elf_common_section_index
2312 extern asection
*_bfd_elf_common_section
2315 extern bfd_vma _bfd_elf_default_got_elt_size
2316 (bfd
*, struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd
*,
2319 extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn
2320 (bfd
*, arelent
*, struct bfd_symbol
*, void *,
2321 asection
*, bfd
*, char **);
2323 extern bfd_boolean bfd_elf_final_link
2324 (bfd
*, struct bfd_link_info
*);
2326 extern void _bfd_elf_gc_keep
2327 (struct bfd_link_info
*info
);
2329 extern bfd_boolean bfd_elf_gc_mark_dynamic_ref_symbol
2330 (struct elf_link_hash_entry
*h
, void *inf
);
2332 extern bfd_boolean bfd_elf_gc_sections
2333 (bfd
*, struct bfd_link_info
*);
2335 extern bfd_boolean bfd_elf_gc_record_vtinherit
2336 (bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
);
2338 extern bfd_boolean bfd_elf_gc_record_vtentry
2339 (bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
);
2341 extern asection
*_bfd_elf_gc_mark_hook
2342 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
2343 struct elf_link_hash_entry
*, Elf_Internal_Sym
*);
2345 extern asection
*_bfd_elf_gc_mark_rsec
2346 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
,
2347 struct elf_reloc_cookie
*, bfd_boolean
*);
2349 extern bfd_boolean _bfd_elf_gc_mark_reloc
2350 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
,
2351 struct elf_reloc_cookie
*);
2353 extern bfd_boolean _bfd_elf_gc_mark_fdes
2354 (struct bfd_link_info
*, asection
*, asection
*, elf_gc_mark_hook_fn
,
2355 struct elf_reloc_cookie
*);
2357 extern bfd_boolean _bfd_elf_gc_mark
2358 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
);
2360 extern bfd_boolean _bfd_elf_gc_mark_extra_sections
2361 (struct bfd_link_info
*, elf_gc_mark_hook_fn
);
2363 extern bfd_boolean bfd_elf_gc_common_finalize_got_offsets
2364 (bfd
*, struct bfd_link_info
*);
2366 extern bfd_boolean bfd_elf_gc_common_final_link
2367 (bfd
*, struct bfd_link_info
*);
2369 extern asection
*_bfd_elf_is_start_stop
2370 (const struct bfd_link_info
*, struct elf_link_hash_entry
*);
2372 extern bfd_boolean bfd_elf_reloc_symbol_deleted_p
2375 extern struct elf_segment_map
* _bfd_elf_make_dynamic_segment
2376 (bfd
*, asection
*);
2378 extern bfd_boolean _bfd_elf_map_sections_to_segments
2379 (bfd
*, struct bfd_link_info
*);
2381 extern bfd_boolean
_bfd_elf_is_function_type (unsigned int);
2383 extern bfd_size_type
_bfd_elf_maybe_function_sym (const asymbol
*, asection
*,
2386 extern asection
*_bfd_elf_get_reloc_section (asection
*);
2388 extern int bfd_elf_get_default_section_type (flagword
);
2390 extern bfd_boolean bfd_elf_lookup_section_flags
2391 (struct bfd_link_info
*, struct flag_info
*, asection
*);
2393 extern Elf_Internal_Phdr
* _bfd_elf_find_segment_containing_section
2394 (bfd
* abfd
, asection
* section
);
2396 /* PowerPC @tls opcode transform/validate. */
2397 extern unsigned int _bfd_elf_ppc_at_tls_transform
2398 (unsigned int, unsigned int);
2399 /* PowerPC @tprel opcode transform/validate. */
2400 extern unsigned int _bfd_elf_ppc_at_tprel_transform
2401 (unsigned int, unsigned int);
2402 /* PowerPC elf_object_p tweak. */
2403 extern bfd_boolean
_bfd_elf_ppc_set_arch (bfd
*);
2404 /* PowerPC .gnu.attributes handling common to both 32-bit and 64-bit. */
2405 extern void _bfd_elf_ppc_merge_fp_attributes (bfd
*, struct bfd_link_info
*);
2407 /* Exported interface for writing elf corefile notes. */
2408 extern char *elfcore_write_note
2409 (bfd
*, char *, int *, const char *, int, const void *, int);
2410 extern char *elfcore_write_prpsinfo
2411 (bfd
*, char *, int *, const char *, const char *);
2412 extern char *elfcore_write_prstatus
2413 (bfd
*, char *, int *, long, int, const void *);
2414 extern char * elfcore_write_pstatus
2415 (bfd
*, char *, int *, long, int, const void *);
2416 extern char *elfcore_write_prfpreg
2417 (bfd
*, char *, int *, const void *, int);
2418 extern char *elfcore_write_prxfpreg
2419 (bfd
*, char *, int *, const void *, int);
2420 extern char *elfcore_write_xstatereg
2421 (bfd
*, char *, int *, const void *, int);
2422 extern char *elfcore_write_ppc_vmx
2423 (bfd
*, char *, int *, const void *, int);
2424 extern char *elfcore_write_ppc_vsx
2425 (bfd
*, char *, int *, const void *, int);
2426 extern char *elfcore_write_s390_timer
2427 (bfd
*, char *, int *, const void *, int);
2428 extern char *elfcore_write_s390_todcmp
2429 (bfd
*, char *, int *, const void *, int);
2430 extern char *elfcore_write_s390_todpreg
2431 (bfd
*, char *, int *, const void *, int);
2432 extern char *elfcore_write_s390_ctrs
2433 (bfd
*, char *, int *, const void *, int);
2434 extern char *elfcore_write_s390_prefix
2435 (bfd
*, char *, int *, const void *, int);
2436 extern char *elfcore_write_s390_last_break
2437 (bfd
*, char *, int *, const void *, int);
2438 extern char *elfcore_write_s390_system_call
2439 (bfd
*, char *, int *, const void *, int);
2440 extern char *elfcore_write_s390_tdb
2441 (bfd
*, char *, int *, const void *, int);
2442 extern char *elfcore_write_s390_vxrs_low
2443 (bfd
*, char *, int *, const void *, int);
2444 extern char *elfcore_write_s390_vxrs_high
2445 (bfd
*, char *, int *, const void *, int);
2446 extern char *elfcore_write_arm_vfp
2447 (bfd
*, char *, int *, const void *, int);
2448 extern char *elfcore_write_aarch_tls
2449 (bfd
*, char *, int *, const void *, int);
2450 extern char *elfcore_write_aarch_hw_break
2451 (bfd
*, char *, int *, const void *, int);
2452 extern char *elfcore_write_aarch_hw_watch
2453 (bfd
*, char *, int *, const void *, int);
2454 extern char *elfcore_write_lwpstatus
2455 (bfd
*, char *, int *, long, int, const void *);
2456 extern char *elfcore_write_register_note
2457 (bfd
*, char *, int *, const char *, const void *, int);
2459 /* Internal structure which holds information to be included in the
2460 PRPSINFO section of Linux core files.
2462 This is an "internal" structure in the sense that it should be used
2463 to pass information to BFD (via the `elfcore_write_linux_prpsinfo'
2464 function), so things like endianess shouldn't be an issue. This
2465 structure will eventually be converted in one of the
2466 `elf_external_linux_*' structures and written out to an output bfd
2467 by one of the functions declared below. */
2469 struct elf_internal_linux_prpsinfo
2471 char pr_state
; /* Numeric process state. */
2472 char pr_sname
; /* Char for pr_state. */
2473 char pr_zomb
; /* Zombie. */
2474 char pr_nice
; /* Nice val. */
2475 unsigned long pr_flag
; /* Flags. */
2476 unsigned int pr_uid
;
2477 unsigned int pr_gid
;
2478 int pr_pid
, pr_ppid
, pr_pgrp
, pr_sid
;
2479 char pr_fname
[16 + 1]; /* Filename of executable. */
2480 char pr_psargs
[80 + 1]; /* Initial part of arg list. */
2483 /* Linux/most 32-bit archs. */
2484 extern char *elfcore_write_linux_prpsinfo32
2485 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
2487 /* Linux/most 64-bit archs. */
2488 extern char *elfcore_write_linux_prpsinfo64
2489 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
2491 /* Linux/PPC32 uses different layout compared to most archs. */
2492 extern char *elfcore_write_ppc_linux_prpsinfo32
2493 (bfd
*, char *, int *, const struct elf_internal_linux_prpsinfo
*);
2495 extern bfd
*_bfd_elf32_bfd_from_remote_memory
2496 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
2497 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, bfd_size_type
));
2498 extern bfd
*_bfd_elf64_bfd_from_remote_memory
2499 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_size_type size
, bfd_vma
*loadbasep
,
2500 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, bfd_size_type
));
2502 extern bfd_vma
bfd_elf_obj_attr_size (bfd
*);
2503 extern void bfd_elf_set_obj_attr_contents (bfd
*, bfd_byte
*, bfd_vma
);
2504 extern int bfd_elf_get_obj_attr_int (bfd
*, int, unsigned int);
2505 extern void bfd_elf_add_obj_attr_int (bfd
*, int, unsigned int, unsigned int);
2506 #define bfd_elf_add_proc_attr_int(BFD, TAG, VALUE) \
2507 bfd_elf_add_obj_attr_int ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2508 extern void bfd_elf_add_obj_attr_string (bfd
*, int, unsigned int, const char *);
2509 #define bfd_elf_add_proc_attr_string(BFD, TAG, VALUE) \
2510 bfd_elf_add_obj_attr_string ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2511 extern void bfd_elf_add_obj_attr_int_string (bfd
*, int, unsigned int,
2512 unsigned int, const char *);
2513 #define bfd_elf_add_proc_attr_int_string(BFD, TAG, INTVAL, STRVAL) \
2514 bfd_elf_add_obj_attr_int_string ((BFD), OBJ_ATTR_PROC, (TAG), \
2517 extern char *_bfd_elf_attr_strdup (bfd
*, const char *);
2518 extern void _bfd_elf_copy_obj_attributes (bfd
*, bfd
*);
2519 extern int _bfd_elf_obj_attrs_arg_type (bfd
*, int, unsigned int);
2520 extern void _bfd_elf_parse_attributes (bfd
*, Elf_Internal_Shdr
*);
2521 extern bfd_boolean _bfd_elf_merge_object_attributes
2522 (bfd
*, struct bfd_link_info
*);
2523 extern bfd_boolean
_bfd_elf_merge_unknown_attribute_low (bfd
*, bfd
*, int);
2524 extern bfd_boolean
_bfd_elf_merge_unknown_attribute_list (bfd
*, bfd
*);
2525 extern Elf_Internal_Shdr
*_bfd_elf_single_rel_hdr (asection
*sec
);
2527 /* The linker may need to keep track of the number of relocs that it
2528 decides to copy as dynamic relocs in check_relocs for each symbol.
2529 This is so that it can later discard them if they are found to be
2530 unnecessary. We can store the information in a field extending the
2531 regular ELF linker hash table. */
2533 struct elf_dyn_relocs
2535 struct elf_dyn_relocs
*next
;
2537 /* The input section of the reloc. */
2540 /* Total number of relocs copied for the input section. */
2541 bfd_size_type count
;
2543 /* Number of pc-relative relocs copied for the input section. */
2544 bfd_size_type pc_count
;
2547 extern bfd_boolean _bfd_elf_create_ifunc_sections
2548 (bfd
*, struct bfd_link_info
*);
2549 extern bfd_boolean _bfd_elf_allocate_ifunc_dyn_relocs
2550 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
2551 struct elf_dyn_relocs
**, bfd_boolean
*, unsigned int,
2552 unsigned int, unsigned int, bfd_boolean
);
2553 extern long _bfd_elf_ifunc_get_synthetic_symtab
2554 (bfd
*, long, asymbol
**, long, asymbol
**, asymbol
**, asection
*,
2555 bfd_vma
*(*) (bfd
*, asymbol
**, asection
*, asection
*));
2557 extern void elf_append_rela (bfd
*, asection
*, Elf_Internal_Rela
*);
2558 extern void elf_append_rel (bfd
*, asection
*, Elf_Internal_Rela
*);
2560 extern bfd_vma
elf64_r_info (bfd_vma
, bfd_vma
);
2561 extern bfd_vma
elf64_r_sym (bfd_vma
);
2562 extern bfd_vma
elf32_r_info (bfd_vma
, bfd_vma
);
2563 extern bfd_vma
elf32_r_sym (bfd_vma
);
2565 /* Large common section. */
2566 extern asection _bfd_elf_large_com_section
;
2568 /* Hash for local symbol with the first section id, ID, in the input
2569 file and the local symbol index, SYM. */
2570 #define ELF_LOCAL_SYMBOL_HASH(ID, SYM) \
2571 (((((ID) & 0xff) << 24) | (((ID) & 0xff00) << 8)) \
2572 ^ (SYM) ^ ((ID) >> 16))
2574 /* This is the condition under which finish_dynamic_symbol will be called.
2575 If our finish_dynamic_symbol isn't called, we'll need to do something
2576 about initializing any .plt and .got entries in relocate_section. */
2577 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
2579 && ((SHARED) || !(H)->forced_local) \
2580 && ((H)->dynindx != -1 || (H)->forced_local))
2582 /* This macro is to avoid lots of duplicated code in the body
2583 of xxx_relocate_section() in the various elfxx-xxxx.c files. */
2584 #define RELOC_FOR_GLOBAL_SYMBOL(info, input_bfd, input_section, rel, \
2585 r_symndx, symtab_hdr, sym_hashes, \
2586 h, sec, relocation, \
2587 unresolved_reloc, warned, ignored) \
2590 /* It seems this can happen with erroneous or unsupported \
2591 input (mixing a.out and elf in an archive, for example.) */ \
2592 if (sym_hashes == NULL) \
2595 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; \
2597 if (info->wrap_hash != NULL \
2598 && (input_section->flags & SEC_DEBUGGING) != 0) \
2599 h = ((struct elf_link_hash_entry *) \
2600 unwrap_hash_lookup (info, input_bfd, &h->root)); \
2602 while (h->root.type == bfd_link_hash_indirect \
2603 || h->root.type == bfd_link_hash_warning) \
2604 h = (struct elf_link_hash_entry *) h->root.u.i.link; \
2608 unresolved_reloc = FALSE; \
2610 if (h->root.type == bfd_link_hash_defined \
2611 || h->root.type == bfd_link_hash_defweak) \
2613 sec = h->root.u.def.section; \
2615 || sec->output_section == NULL) \
2616 /* Set a flag that will be cleared later if we find a \
2617 relocation value for this symbol. output_section \
2618 is typically NULL for symbols satisfied by a shared \
2620 unresolved_reloc = TRUE; \
2622 relocation = (h->root.u.def.value \
2623 + sec->output_section->vma \
2624 + sec->output_offset); \
2626 else if (h->root.type == bfd_link_hash_undefweak) \
2628 else if (info->unresolved_syms_in_objects == RM_IGNORE \
2629 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) \
2631 else if (!bfd_link_relocatable (info)) \
2634 err = (info->unresolved_syms_in_objects == RM_GENERATE_ERROR \
2635 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT); \
2636 (*info->callbacks->undefined_symbol) (info, \
2637 h->root.root.string, \
2640 rel->r_offset, err); \
2643 (void) unresolved_reloc; \
2649 /* This macro is to avoid lots of duplicated code in the body of the
2650 loop over relocations in xxx_relocate_section() in the various
2653 Handle relocations against symbols from removed linkonce sections,
2654 or sections discarded by a linker script. When doing a relocatable
2655 link, we remove such relocations. Otherwise, we just want the
2656 section contents zeroed and avoid any special processing. */
2657 #define RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
2658 rel, count, relend, \
2659 howto, index, contents) \
2662 _bfd_clear_contents (howto, input_bfd, input_section, \
2663 contents + rel[index].r_offset); \
2665 if (bfd_link_relocatable (info) \
2666 && (input_section->flags & SEC_DEBUGGING)) \
2668 /* Only remove relocations in debug sections since other \
2669 sections may require relocations. */ \
2670 Elf_Internal_Shdr *rel_hdr; \
2672 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
2674 /* Avoid empty output section. */ \
2675 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
2677 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
2678 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
2679 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
2681 memmove (rel, rel + count, \
2682 (relend - rel - count) * sizeof (*rel)); \
2684 input_section->reloc_count--; \
2691 for (i_ = 0; i_ < count; i_++) \
2693 rel[i_].r_info = 0; \
2694 rel[i_].r_addend = 0; \
2700 /* Will a symbol be bound to the definition within the shared
2701 library, if any. A unique symbol can never be bound locally. */
2702 #define SYMBOLIC_BIND(INFO, H) \
2703 (!(H)->unique_global \
2704 && ((INFO)->symbolic || ((INFO)->dynamic && !(H)->dynamic)))
2709 #endif /* _LIBELF_H_ */