1 /* BFD back-end data structures for ELF files.
2 Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
3 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
4 Free Software Foundation, Inc.
5 Written by Cygnus Support.
7 This file is part of BFD, the Binary File Descriptor library.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22 MA 02110-1301, USA. */
27 #include "elf/common.h"
28 #include "elf/external.h"
29 #include "elf/internal.h"
32 /* The number of entries in a section is its size divided by the size
33 of a single entry. This is normally only applicable to reloc and
34 symbol table sections.
35 PR 9934: It is possible to have relocations that do not refer to
36 symbols, thus it is also possible to have a relocation section in
37 an object file, but no symbol table. */
38 #define NUM_SHDR_ENTRIES(shdr) ((shdr)->sh_entsize > 0 ? (shdr)->sh_size / (shdr)->sh_entsize : 0)
40 /* If size isn't specified as 64 or 32, NAME macro should fail. */
43 #define NAME(x, y) x ## 64 ## _ ## y
46 #define NAME(x, y) x ## 32 ## _ ## y
51 #define NAME(x, y) x ## NOSIZE ## _ ## y
54 #define ElfNAME(X) NAME(Elf,X)
55 #define elfNAME(X) NAME(elf,X)
57 /* Information held for an ELF symbol. The first field is the
58 corresponding asymbol. Every symbol is an ELF file is actually a
59 pointer to this structure, although it is often handled as a
60 pointer to an asymbol. */
66 /* ELF symbol information. */
67 Elf_Internal_Sym internal_elf_sym
;
68 /* Backend specific information. */
71 unsigned int hppa_arg_reloc
;
77 /* Version information. This is from an Elf_Internal_Versym
78 structure in a SHT_GNU_versym section. It is zero if there is no
79 version information. */
80 unsigned short version
;
84 struct elf_strtab_hash
;
90 bfd_signed_vma refcount
;
92 struct got_entry
*glist
;
93 struct plt_entry
*plist
;
96 struct elf_link_virtual_table_entry
98 /* Virtual table entry use information. This array is nominally of size
99 size/sizeof(target_void_pointer), though we have to be able to assume
100 and track a size while the symbol is still undefined. It is indexed
101 via offset/sizeof(target_void_pointer). */
105 /* Virtual table derivation info. */
106 struct elf_link_hash_entry
*parent
;
109 /* ELF linker hash table entries. */
111 struct elf_link_hash_entry
113 struct bfd_link_hash_entry root
;
115 /* Symbol index in output file. This is initialized to -1. It is
116 set to -2 if the symbol is used by a reloc. */
119 /* Symbol index as a dynamic symbol. Initialized to -1, and remains
120 -1 if this is not a dynamic symbol. */
121 /* ??? Note that this is consistently used as a synonym for tests
122 against whether we can perform various simplifying transformations
123 to the code. (E.g. changing a pc-relative jump to a PLT entry
124 into a pc-relative jump to the target function.) That test, which
125 is often relatively complex, and someplaces wrong or incomplete,
126 should really be replaced by a predicate in elflink.c.
128 End result: this field -1 does not indicate that the symbol is
129 not in the dynamic symbol table, but rather that the symbol is
130 not visible outside this DSO. */
133 /* If this symbol requires an entry in the global offset table, the
134 processor specific backend uses this field to track usage and
135 final offset. Two schemes are supported: The first assumes that
136 a symbol may only have one GOT entry, and uses REFCOUNT until
137 size_dynamic_sections, at which point the contents of the .got is
138 fixed. Afterward, if OFFSET is -1, then the symbol does not
139 require a global offset table entry. The second scheme allows
140 multiple GOT entries per symbol, managed via a linked list
141 pointed to by GLIST. */
142 union gotplt_union got
;
144 /* Same, but tracks a procedure linkage table entry. */
145 union gotplt_union plt
;
150 /* Symbol type (STT_NOTYPE, STT_OBJECT, etc.). */
151 unsigned int type
: 8;
153 /* Symbol st_other value, symbol visibility. */
154 unsigned int other
: 8;
156 /* The symbol's st_target_internal value (see Elf_Internal_Sym). */
157 unsigned int target_internal
: 8;
159 /* Symbol is referenced by a non-shared object (other than the object
160 in which it is defined). */
161 unsigned int ref_regular
: 1;
162 /* Symbol is defined by a non-shared object. */
163 unsigned int def_regular
: 1;
164 /* Symbol is referenced by a shared object. */
165 unsigned int ref_dynamic
: 1;
166 /* Symbol is defined by a shared object. */
167 unsigned int def_dynamic
: 1;
168 /* Symbol has a non-weak reference from a non-shared object (other than
169 the object in which it is defined). */
170 unsigned int ref_regular_nonweak
: 1;
171 /* Dynamic symbol has been adjustd. */
172 unsigned int dynamic_adjusted
: 1;
173 /* Symbol needs a copy reloc. */
174 unsigned int needs_copy
: 1;
175 /* Symbol needs a procedure linkage table entry. */
176 unsigned int needs_plt
: 1;
177 /* Symbol appears in a non-ELF input file. */
178 unsigned int non_elf
: 1;
179 /* Symbol should be marked as hidden in the version information. */
180 unsigned int hidden
: 1;
181 /* Symbol was forced to local scope due to a version script file. */
182 unsigned int forced_local
: 1;
183 /* Symbol was forced to be dynamic due to a version script file. */
184 unsigned int dynamic
: 1;
185 /* Symbol was marked during garbage collection. */
186 unsigned int mark
: 1;
187 /* Symbol is referenced by a non-GOT/non-PLT relocation. This is
188 not currently set by all the backends. */
189 unsigned int non_got_ref
: 1;
190 /* Symbol has a definition in a shared object.
191 FIXME: There is no real need for this field if def_dynamic is never
192 cleared and all places that test def_dynamic also test def_regular. */
193 unsigned int dynamic_def
: 1;
194 /* Symbol is weak in all shared objects. */
195 unsigned int dynamic_weak
: 1;
196 /* Symbol is referenced with a relocation where C/C++ pointer equality
198 unsigned int pointer_equality_needed
: 1;
199 /* Symbol is a unique global symbol. */
200 unsigned int unique_global
: 1;
202 /* String table index in .dynstr if this is a dynamic symbol. */
203 unsigned long dynstr_index
;
207 /* If this is a weak defined symbol from a dynamic object, this
208 field points to a defined symbol with the same value, if there is
209 one. Otherwise it is NULL. */
210 struct elf_link_hash_entry
*weakdef
;
212 /* Hash value of the name computed using the ELF hash function.
213 Used part way through size_dynamic_sections, after we've finished
215 unsigned long elf_hash_value
;
218 /* Version information. */
221 /* This field is used for a symbol which is not defined in a
222 regular object. It points to the version information read in
223 from the dynamic object. */
224 Elf_Internal_Verdef
*verdef
;
225 /* This field is used for a symbol which is defined in a regular
226 object. It is set up in size_dynamic_sections. It points to
227 the version information we should write out for this symbol. */
228 struct bfd_elf_version_tree
*vertree
;
231 struct elf_link_virtual_table_entry
*vtable
;
234 /* Will references to this symbol always reference the symbol
236 #define SYMBOL_REFERENCES_LOCAL(INFO, H) \
237 _bfd_elf_symbol_refs_local_p (H, INFO, 0)
239 /* Will _calls_ to this symbol always call the version in this object? */
240 #define SYMBOL_CALLS_LOCAL(INFO, H) \
241 _bfd_elf_symbol_refs_local_p (H, INFO, 1)
243 /* Common symbols that are turned into definitions don't have the
244 DEF_REGULAR flag set, so they might appear to be undefined. */
245 #define ELF_COMMON_DEF_P(H) \
247 && !(H)->def_dynamic \
248 && (H)->root.type == bfd_link_hash_defined)
250 /* Records local symbols to be emitted in the dynamic symbol table. */
252 struct elf_link_local_dynamic_entry
254 struct elf_link_local_dynamic_entry
*next
;
256 /* The input bfd this symbol came from. */
259 /* The index of the local symbol being copied. */
262 /* The index in the outgoing dynamic symbol table. */
265 /* A copy of the input symbol. */
266 Elf_Internal_Sym isym
;
269 struct elf_link_loaded_list
271 struct elf_link_loaded_list
*next
;
275 /* Structures used by the eh_frame optimization code. */
280 /* If REMOVED == 1, this is the CIE that the FDE originally used.
281 The CIE belongs to the same .eh_frame input section as the FDE.
283 If REMOVED == 0, this is the CIE that we have chosen to use for
284 the output FDE. The CIE's REMOVED field is also 0, but the CIE
285 might belong to a different .eh_frame input section from the FDE. */
286 struct eh_cie_fde
*cie_inf
;
287 struct eh_cie_fde
*next_for_section
;
290 /* CIEs have three states:
292 - REMOVED && !MERGED: Slated for removal because we haven't yet
293 proven that an FDE needs it. FULL_CIE, if nonnull, points to
294 more detailed information about the CIE.
296 - REMOVED && MERGED: We have merged this CIE with MERGED_WITH,
297 which may not belong to the same input section.
299 - !REMOVED: We have decided to keep this CIE. SEC is the
300 .eh_frame input section that contains the CIE. */
302 struct cie
*full_cie
;
303 struct eh_cie_fde
*merged_with
;
307 /* The offset of the personality data from the start of the CIE,
308 or 0 if the CIE doesn't have any. */
309 unsigned int personality_offset
: 8;
311 /* True if we have marked relocations associated with this CIE. */
312 unsigned int gc_mark
: 1;
314 /* True if we have decided to turn an absolute LSDA encoding into
315 a PC-relative one. */
316 unsigned int make_lsda_relative
: 1;
318 /* True if we have decided to turn an absolute personality
319 encoding into a PC-relative one. */
320 unsigned int make_per_encoding_relative
: 1;
322 /* True if the CIE contains personality data and if that
323 data uses a PC-relative encoding. Always true when
324 make_per_encoding_relative is. */
325 unsigned int per_encoding_relative
: 1;
327 /* True if we need to add an 'R' (FDE encoding) entry to the
328 CIE's augmentation data. */
329 unsigned int add_fde_encoding
: 1;
331 /* True if we have merged this CIE with another. */
332 unsigned int merged
: 1;
335 unsigned int pad1
: 18;
338 unsigned int reloc_index
;
341 unsigned int new_offset
;
342 unsigned int fde_encoding
: 8;
343 unsigned int lsda_encoding
: 8;
344 unsigned int lsda_offset
: 8;
346 /* True if this entry represents a CIE, false if it represents an FDE. */
347 unsigned int cie
: 1;
349 /* True if this entry is currently marked for removal. */
350 unsigned int removed
: 1;
352 /* True if we need to add a 'z' (augmentation size) entry to the CIE's
353 augmentation data, and an associated byte to each of the CIE's FDEs. */
354 unsigned int add_augmentation_size
: 1;
356 /* True if we have decided to convert absolute FDE relocations into
357 relative ones. This applies to the first relocation in the FDE,
358 which is against the code that the FDE describes. */
359 unsigned int make_relative
: 1;
362 unsigned int pad1
: 4;
364 unsigned int *set_loc
;
367 struct eh_frame_sec_info
371 struct eh_cie_fde entry
[1];
374 struct eh_frame_array_ent
382 struct eh_frame_hdr_info
386 unsigned int fde_count
, array_count
;
387 struct eh_frame_array_ent
*array
;
388 /* TRUE if we should try to merge CIEs between input sections. */
389 bfd_boolean merge_cies
;
390 /* TRUE if all .eh_frames have been parsd. */
391 bfd_boolean parsed_eh_frames
;
392 /* TRUE if .eh_frame_hdr should contain the sorted search table.
393 We build it if we successfully read all .eh_frame input sections
394 and recognize them. */
398 /* Enum used to identify target specific extensions to the elf_obj_tdata
399 and elf_link_hash_table structures. Note the enums deliberately start
400 from 1 so that we can detect an uninitialized field. The generic value
401 is last so that additions to this enum do not need to modify more than
405 AARCH64_ELF_DATA
= 1,
438 /* ELF linker hash table. */
440 struct elf_link_hash_table
442 struct bfd_link_hash_table root
;
444 /* An identifier used to distinguish different target
445 specific extensions to this structure. */
446 enum elf_target_id hash_table_id
;
448 /* Whether we have created the special dynamic sections required
449 when linking against or generating a shared object. */
450 bfd_boolean dynamic_sections_created
;
452 /* True if this target has relocatable executables, so needs dynamic
454 bfd_boolean is_relocatable_executable
;
456 /* The BFD used to hold special sections created by the linker.
457 This will be the first BFD found which requires these sections to
461 /* The value to use when initialising got.refcount/offset and
462 plt.refcount/offset in an elf_link_hash_entry. Set to zero when
463 the values are refcounts. Set to init_got_offset/init_plt_offset
464 in size_dynamic_sections when the values may be offsets. */
465 union gotplt_union init_got_refcount
;
466 union gotplt_union init_plt_refcount
;
468 /* The value to use for got.refcount/offset and plt.refcount/offset
469 when the values may be offsets. Normally (bfd_vma) -1. */
470 union gotplt_union init_got_offset
;
471 union gotplt_union init_plt_offset
;
473 /* The number of symbols found in the link which must be put into
474 the .dynsym section. */
475 bfd_size_type dynsymcount
;
477 /* The string table of dynamic symbols, which becomes the .dynstr
479 struct elf_strtab_hash
*dynstr
;
481 /* The number of buckets in the hash table in the .hash section.
482 This is based on the number of dynamic symbols. */
483 bfd_size_type bucketcount
;
485 /* A linked list of DT_NEEDED names found in dynamic objects
486 included in the link. */
487 struct bfd_link_needed_list
*needed
;
489 /* Sections in the output bfd that provides a section symbol
490 to be used by relocations emitted against local symbols.
491 Most targets will not use data_index_section. */
492 asection
*text_index_section
;
493 asection
*data_index_section
;
495 /* The _GLOBAL_OFFSET_TABLE_ symbol. */
496 struct elf_link_hash_entry
*hgot
;
498 /* The _PROCEDURE_LINKAGE_TABLE_ symbol. */
499 struct elf_link_hash_entry
*hplt
;
501 /* The _DYNAMIC symbol. */
502 struct elf_link_hash_entry
*hdynamic
;
504 /* A pointer to information used to merge SEC_MERGE sections. */
507 /* Used to link stabs in sections. */
508 struct stab_info stab_info
;
510 /* Used by eh_frame code when editing .eh_frame. */
511 struct eh_frame_hdr_info eh_info
;
513 /* A linked list of local symbols to be added to .dynsym. */
514 struct elf_link_local_dynamic_entry
*dynlocal
;
516 /* A linked list of DT_RPATH/DT_RUNPATH names found in dynamic
517 objects included in the link. */
518 struct bfd_link_needed_list
*runpath
;
520 /* Cached first output tls section and size of PT_TLS segment. */
522 bfd_size_type tls_size
;
524 /* A linked list of BFD's loaded in the link. */
525 struct elf_link_loaded_list
*loaded
;
527 /* Short-cuts to get to dynamic linker sections. */
539 /* Look up an entry in an ELF linker hash table. */
541 #define elf_link_hash_lookup(table, string, create, copy, follow) \
542 ((struct elf_link_hash_entry *) \
543 bfd_link_hash_lookup (&(table)->root, (string), (create), \
546 /* Traverse an ELF linker hash table. */
548 #define elf_link_hash_traverse(table, func, info) \
549 (bfd_link_hash_traverse \
551 (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func), \
554 /* Get the ELF linker hash table from a link_info structure. */
556 #define elf_hash_table(p) ((struct elf_link_hash_table *) ((p)->hash))
558 #define elf_hash_table_id(table) ((table) -> hash_table_id)
560 /* Returns TRUE if the hash table is a struct elf_link_hash_table. */
561 #define is_elf_hash_table(htab) \
562 (((struct bfd_link_hash_table *) (htab))->type == bfd_link_elf_hash_table)
564 /* Used by bfd_sym_from_r_symndx to cache a small number of local
566 #define LOCAL_SYM_CACHE_SIZE 32
570 unsigned long indx
[LOCAL_SYM_CACHE_SIZE
];
571 Elf_Internal_Sym sym
[LOCAL_SYM_CACHE_SIZE
];
574 /* Constant information held for an ELF backend. */
576 struct elf_size_info
{
577 unsigned char sizeof_ehdr
, sizeof_phdr
, sizeof_shdr
;
578 unsigned char sizeof_rel
, sizeof_rela
, sizeof_sym
, sizeof_dyn
, sizeof_note
;
580 /* The size of entries in the .hash section. */
581 unsigned char sizeof_hash_entry
;
583 /* The number of internal relocations to allocate per external
585 unsigned char int_rels_per_ext_rel
;
586 /* We use some fixed size arrays. This should be large enough to
587 handle all back-ends. */
588 #define MAX_INT_RELS_PER_EXT_REL 3
590 unsigned char arch_size
, log_file_align
;
591 unsigned char elfclass
, ev_current
;
592 int (*write_out_phdrs
)
593 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
595 (*write_shdrs_and_ehdr
) (bfd
*);
596 bfd_boolean (*checksum_contents
)
597 (bfd
* , void (*) (const void *, size_t, void *), void *);
599 (bfd
*, asection
*, void *);
600 bfd_boolean (*swap_symbol_in
)
601 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
602 void (*swap_symbol_out
)
603 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
604 bfd_boolean (*slurp_reloc_table
)
605 (bfd
*, asection
*, asymbol
**, bfd_boolean
);
606 long (*slurp_symbol_table
)
607 (bfd
*, asymbol
**, bfd_boolean
);
609 (bfd
*, const void *, Elf_Internal_Dyn
*);
611 (bfd
*, const Elf_Internal_Dyn
*, void *);
613 /* This function is called to swap in a REL relocation. If an
614 external relocation corresponds to more than one internal
615 relocation, then all relocations are swapped in at once. */
616 void (*swap_reloc_in
)
617 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
619 /* This function is called to swap out a REL relocation. */
620 void (*swap_reloc_out
)
621 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
623 /* This function is called to swap in a RELA relocation. If an
624 external relocation corresponds to more than one internal
625 relocation, then all relocations are swapped in at once. */
626 void (*swap_reloca_in
)
627 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
629 /* This function is called to swap out a RELA relocation. */
630 void (*swap_reloca_out
)
631 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
634 #define elf_symbol_from(ABFD,S) \
635 (((S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \
636 && (S)->the_bfd->tdata.elf_obj_data != 0) \
637 ? (elf_symbol_type *) (S) \
640 enum elf_reloc_type_class
{
642 reloc_class_relative
,
647 struct elf_reloc_cookie
649 Elf_Internal_Rela
*rels
, *rel
, *relend
;
650 Elf_Internal_Sym
*locsyms
;
654 struct elf_link_hash_entry
**sym_hashes
;
656 bfd_boolean bad_symtab
;
659 /* The level of IRIX compatibility we're striving for. */
667 /* Mapping of ELF section names and types. */
668 struct bfd_elf_special_section
672 /* 0 means name must match PREFIX exactly.
673 -1 means name must start with PREFIX followed by an arbitrary string.
674 -2 means name must match PREFIX exactly or consist of PREFIX followed
675 by a dot then anything.
676 > 0 means name must start with the first PREFIX_LENGTH chars of
677 PREFIX and finish with the last SUFFIX_LENGTH chars of PREFIX. */
683 enum action_discarded
689 typedef asection
* (*elf_gc_mark_hook_fn
)
690 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
691 struct elf_link_hash_entry
*, Elf_Internal_Sym
*);
693 struct elf_backend_data
695 /* The architecture for this backend. */
696 enum bfd_architecture arch
;
698 /* An identifier used to distinguish different target specific
699 extensions to elf_obj_tdata and elf_link_hash_table structures. */
700 enum elf_target_id target_id
;
702 /* The ELF machine code (EM_xxxx) for this backend. */
703 int elf_machine_code
;
708 /* The maximum page size for this backend. */
711 /* The minimum page size for this backend. An input object will not be
712 considered page aligned unless its sections are correctly aligned for
713 pages at least this large. May be smaller than maxpagesize. */
716 /* The common page size for this backend. */
717 bfd_vma commonpagesize
;
719 /* The BFD flags applied to sections created for dynamic linking. */
720 flagword dynamic_sec_flags
;
722 /* Architecture-specific data for this backend.
723 This is actually a pointer to some type like struct elf_ARCH_data. */
724 const void *arch_data
;
726 /* A function to translate an ELF RELA relocation to a BFD arelent
728 void (*elf_info_to_howto
)
729 (bfd
*, arelent
*, Elf_Internal_Rela
*);
731 /* A function to translate an ELF REL relocation to a BFD arelent
733 void (*elf_info_to_howto_rel
)
734 (bfd
*, arelent
*, Elf_Internal_Rela
*);
736 /* A function to determine whether a symbol is global when
737 partitioning the symbol table into local and global symbols.
738 This should be NULL for most targets, in which case the correct
739 thing will be done. MIPS ELF, at least on the Irix 5, has
740 special requirements. */
741 bfd_boolean (*elf_backend_sym_is_global
)
744 /* The remaining functions are hooks which are called only if they
747 /* A function to permit a backend specific check on whether a
748 particular BFD format is relevant for an object file, and to
749 permit the backend to set any global information it wishes. When
750 this is called elf_elfheader is set, but anything else should be
751 used with caution. If this returns FALSE, the check_format
752 routine will return a bfd_error_wrong_format error. */
753 bfd_boolean (*elf_backend_object_p
)
756 /* A function to do additional symbol processing when reading the
757 ELF symbol table. This is where any processor-specific special
758 section indices are handled. */
759 void (*elf_backend_symbol_processing
)
762 /* A function to do additional symbol processing after reading the
763 entire ELF symbol table. */
764 bfd_boolean (*elf_backend_symbol_table_processing
)
765 (bfd
*, elf_symbol_type
*, unsigned int);
767 /* A function to set the type of the info field. Processor-specific
768 types should be handled here. */
769 int (*elf_backend_get_symbol_type
)
770 (Elf_Internal_Sym
*, int);
772 /* A function to return the linker hash table entry of a symbol that
773 might be satisfied by an archive symbol. */
774 struct elf_link_hash_entry
* (*elf_backend_archive_symbol_lookup
)
775 (bfd
*, struct bfd_link_info
*, const char *);
777 /* Return true if local section symbols should have a non-null st_name.
778 NULL implies false. */
779 bfd_boolean (*elf_backend_name_local_section_symbols
)
782 /* A function to do additional processing on the ELF section header
783 just before writing it out. This is used to set the flags and
784 type fields for some sections, or to actually write out data for
786 bfd_boolean (*elf_backend_section_processing
)
787 (bfd
*, Elf_Internal_Shdr
*);
789 /* A function to handle unusual section types when creating BFD
790 sections from ELF sections. */
791 bfd_boolean (*elf_backend_section_from_shdr
)
792 (bfd
*, Elf_Internal_Shdr
*, const char *, int);
794 /* A function to convert machine dependent ELF section header flags to
795 BFD internal section header flags. */
796 bfd_boolean (*elf_backend_section_flags
)
797 (flagword
*, const Elf_Internal_Shdr
*);
799 /* A function that returns a struct containing ELF section flags and
800 type for the given BFD section. */
801 const struct bfd_elf_special_section
* (*get_sec_type_attr
)
804 /* A function to handle unusual program segment types when creating BFD
805 sections from ELF program segments. */
806 bfd_boolean (*elf_backend_section_from_phdr
)
807 (bfd
*, Elf_Internal_Phdr
*, int, const char *);
809 /* A function to set up the ELF section header for a BFD section in
810 preparation for writing it out. This is where the flags and type
811 fields are set for unusual sections. */
812 bfd_boolean (*elf_backend_fake_sections
)
813 (bfd
*, Elf_Internal_Shdr
*, asection
*);
815 /* A function to get the ELF section index for a BFD section. If
816 this returns TRUE, the section was found. If it is a normal ELF
817 section, *RETVAL should be left unchanged. If it is not a normal
818 ELF section *RETVAL should be set to the SHN_xxxx index. */
819 bfd_boolean (*elf_backend_section_from_bfd_section
)
820 (bfd
*, asection
*, int *retval
);
822 /* If this field is not NULL, it is called by the add_symbols phase
823 of a link just before adding a symbol to the global linker hash
824 table. It may modify any of the fields as it wishes. If *NAME
825 is set to NULL, the symbol will be skipped rather than being
826 added to the hash table. This function is responsible for
827 handling all processor dependent symbol bindings and section
828 indices, and must set at least *FLAGS and *SEC for each processor
829 dependent case; failure to do so will cause a link error. */
830 bfd_boolean (*elf_add_symbol_hook
)
831 (bfd
*abfd
, struct bfd_link_info
*info
, Elf_Internal_Sym
*,
832 const char **name
, flagword
*flags
, asection
**sec
, bfd_vma
*value
);
834 /* If this field is not NULL, it is called by the elf_link_output_sym
835 phase of a link for each symbol which will appear in the object file.
836 On error, this function returns 0. 1 is returned when the symbol
837 should be output, 2 is returned when the symbol should be discarded. */
838 int (*elf_backend_link_output_symbol_hook
)
839 (struct bfd_link_info
*info
, const char *, Elf_Internal_Sym
*,
840 asection
*, struct elf_link_hash_entry
*);
842 /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend
843 linker the first time it encounters a dynamic object in the link.
844 This function must create any sections required for dynamic
845 linking. The ABFD argument is a dynamic object. The .interp,
846 .dynamic, .dynsym, .dynstr, and .hash functions have already been
847 created, and this function may modify the section flags if
848 desired. This function will normally create the .got and .plt
849 sections, but different backends have different requirements. */
850 bfd_boolean (*elf_backend_create_dynamic_sections
)
851 (bfd
*abfd
, struct bfd_link_info
*info
);
853 /* When creating a shared library, determine whether to omit the
854 dynamic symbol for the section. */
855 bfd_boolean (*elf_backend_omit_section_dynsym
)
856 (bfd
*output_bfd
, struct bfd_link_info
*info
, asection
*osec
);
858 /* Return TRUE if relocations of targets are compatible to the extent
859 that CHECK_RELOCS will properly process them. PR 4424. */
860 bfd_boolean (*relocs_compatible
) (const bfd_target
*, const bfd_target
*);
862 /* The CHECK_RELOCS function is called by the add_symbols phase of
863 the ELF backend linker. It is called once for each section with
864 relocs of an object file, just after the symbols for the object
865 file have been added to the global linker hash table. The
866 function must look through the relocs and do any special handling
867 required. This generally means allocating space in the global
868 offset table, and perhaps allocating space for a reloc. The
869 relocs are always passed as Rela structures; if the section
870 actually uses Rel structures, the r_addend field will always be
872 bfd_boolean (*check_relocs
)
873 (bfd
*abfd
, struct bfd_link_info
*info
, asection
*o
,
874 const Elf_Internal_Rela
*relocs
);
876 /* The CHECK_DIRECTIVES function is called once per input file by
877 the add_symbols phase of the ELF backend linker. The function
878 must inspect the bfd and create any additional symbols according
879 to any custom directives in the bfd. */
880 bfd_boolean (*check_directives
)
881 (bfd
*abfd
, struct bfd_link_info
*info
);
883 /* The AS_NEEDED_CLEANUP function is called once per --as-needed
884 input file that was not needed by the add_symbols phase of the
885 ELF backend linker. The function must undo any target specific
886 changes in the symbol hash table. */
887 bfd_boolean (*as_needed_cleanup
)
888 (bfd
*abfd
, struct bfd_link_info
*info
);
890 /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
891 linker for every symbol which is defined by a dynamic object and
892 referenced by a regular object. This is called after all the
893 input files have been seen, but before the SIZE_DYNAMIC_SECTIONS
894 function has been called. The hash table entry should be
895 bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be
896 defined in a section from a dynamic object. Dynamic object
897 sections are not included in the final link, and this function is
898 responsible for changing the value to something which the rest of
899 the link can deal with. This will normally involve adding an
900 entry to the .plt or .got or some such section, and setting the
901 symbol to point to that. */
902 bfd_boolean (*elf_backend_adjust_dynamic_symbol
)
903 (struct bfd_link_info
*info
, struct elf_link_hash_entry
*h
);
905 /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker
906 after all the linker input files have been seen but before the
907 section sizes have been set. This is called after
908 ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS. */
909 bfd_boolean (*elf_backend_always_size_sections
)
910 (bfd
*output_bfd
, struct bfd_link_info
*info
);
912 /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend
913 linker after all the linker input files have been seen but before
914 the sections sizes have been set. This is called after
915 ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols.
916 It is only called when linking against a dynamic object. It must
917 set the sizes of the dynamic sections, and may fill in their
918 contents as well. The generic ELF linker can handle the .dynsym,
919 .dynstr and .hash sections. This function must handle the
920 .interp section and any sections created by the
921 CREATE_DYNAMIC_SECTIONS entry point. */
922 bfd_boolean (*elf_backend_size_dynamic_sections
)
923 (bfd
*output_bfd
, struct bfd_link_info
*info
);
925 /* Set TEXT_INDEX_SECTION and DATA_INDEX_SECTION, the output sections
926 we keep to use as a base for relocs and symbols. */
927 void (*elf_backend_init_index_section
)
928 (bfd
*output_bfd
, struct bfd_link_info
*info
);
930 /* The RELOCATE_SECTION function is called by the ELF backend linker
931 to handle the relocations for a section.
933 The relocs are always passed as Rela structures; if the section
934 actually uses Rel structures, the r_addend field will always be
937 This function is responsible for adjust the section contents as
938 necessary, and (if using Rela relocs and generating a
939 relocatable output file) adjusting the reloc addend as
942 This function does not have to worry about setting the reloc
943 address or the reloc symbol index.
945 LOCAL_SYMS is a pointer to the swapped in local symbols.
947 LOCAL_SECTIONS is an array giving the section in the input file
948 corresponding to the st_shndx field of each local symbol.
950 The global hash table entry for the global symbols can be found
951 via elf_sym_hashes (input_bfd).
953 When generating relocatable output, this function must handle
954 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
955 going to be the section symbol corresponding to the output
956 section, which means that the addend must be adjusted
959 Returns FALSE on error, TRUE on success, 2 if successful and
960 relocations should be written for this section. */
961 int (*elf_backend_relocate_section
)
962 (bfd
*output_bfd
, struct bfd_link_info
*info
, bfd
*input_bfd
,
963 asection
*input_section
, bfd_byte
*contents
, Elf_Internal_Rela
*relocs
,
964 Elf_Internal_Sym
*local_syms
, asection
**local_sections
);
966 /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend
967 linker just before it writes a symbol out to the .dynsym section.
968 The processor backend may make any required adjustment to the
969 symbol. It may also take the opportunity to set contents of the
970 dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on
971 all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called
972 on those symbols which are defined by a dynamic object. */
973 bfd_boolean (*elf_backend_finish_dynamic_symbol
)
974 (bfd
*output_bfd
, struct bfd_link_info
*info
,
975 struct elf_link_hash_entry
*h
, Elf_Internal_Sym
*sym
);
977 /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend
978 linker just before it writes all the dynamic sections out to the
979 output file. The FINISH_DYNAMIC_SYMBOL will have been called on
980 all dynamic symbols. */
981 bfd_boolean (*elf_backend_finish_dynamic_sections
)
982 (bfd
*output_bfd
, struct bfd_link_info
*info
);
984 /* A function to do any beginning processing needed for the ELF file
985 before building the ELF headers and computing file positions. */
986 void (*elf_backend_begin_write_processing
)
987 (bfd
*, struct bfd_link_info
*);
989 /* A function to do any final processing needed for the ELF file
990 before writing it out. The LINKER argument is TRUE if this BFD
991 was created by the ELF backend linker. */
992 void (*elf_backend_final_write_processing
)
993 (bfd
*, bfd_boolean linker
);
995 /* This function is called by get_program_header_size. It should
996 return the number of additional program segments which this BFD
997 will need. It should return -1 on error. */
998 int (*elf_backend_additional_program_headers
)
999 (bfd
*, struct bfd_link_info
*);
1001 /* This function is called to modify an existing segment map in a
1002 backend specific fashion. */
1003 bfd_boolean (*elf_backend_modify_segment_map
)
1004 (bfd
*, struct bfd_link_info
*);
1006 /* This function is called to modify program headers just before
1007 they are written. */
1008 bfd_boolean (*elf_backend_modify_program_headers
)
1009 (bfd
*, struct bfd_link_info
*);
1011 /* This function is called before section garbage collection to
1012 mark entry symbol sections. */
1014 (struct bfd_link_info
*);
1016 /* This function is called during section garbage collection to
1017 mark sections that define global symbols. */
1018 bfd_boolean (*gc_mark_dynamic_ref
)
1019 (struct elf_link_hash_entry
*, void *);
1021 /* This function is called during section gc to discover the section a
1022 particular relocation refers to. */
1023 elf_gc_mark_hook_fn gc_mark_hook
;
1025 /* This function, if defined, is called after the first gc marking pass
1026 to allow the backend to mark additional sections. */
1027 bfd_boolean (*gc_mark_extra_sections
)
1028 (struct bfd_link_info
*, elf_gc_mark_hook_fn
);
1030 /* This function, if defined, is called during the sweep phase of gc
1031 in order that a backend might update any data structures it might
1033 bfd_boolean (*gc_sweep_hook
)
1034 (bfd
*, struct bfd_link_info
*, asection
*, const Elf_Internal_Rela
*);
1036 /* This function, if defined, is called after the ELF headers have
1037 been created. This allows for things like the OS and ABI versions
1039 void (*elf_backend_post_process_headers
)
1040 (bfd
*, struct bfd_link_info
*);
1042 /* This function, if defined, prints a symbol to file and returns the
1043 name of the symbol to be printed. It should return NULL to fall
1044 back to default symbol printing. */
1045 const char *(*elf_backend_print_symbol_all
)
1046 (bfd
*, void *, asymbol
*);
1048 /* This function, if defined, is called after all local symbols and
1049 global symbols converted to locals are emitted into the symtab
1050 section. It allows the backend to emit special local symbols
1051 not handled in the hash table. */
1052 bfd_boolean (*elf_backend_output_arch_local_syms
)
1053 (bfd
*, struct bfd_link_info
*, void *,
1054 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym
*, asection
*,
1055 struct elf_link_hash_entry
*));
1057 /* This function, if defined, is called after all symbols are emitted
1058 into the symtab section. It allows the backend to emit special
1059 global symbols not handled in the hash table. */
1060 bfd_boolean (*elf_backend_output_arch_syms
)
1061 (bfd
*, struct bfd_link_info
*, void *,
1062 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym
*, asection
*,
1063 struct elf_link_hash_entry
*));
1065 /* Copy any information related to dynamic linking from a pre-existing
1066 symbol to a newly created symbol. Also called to copy flags and
1067 other back-end info to a weakdef, in which case the symbol is not
1068 newly created and plt/got refcounts and dynamic indices should not
1070 void (*elf_backend_copy_indirect_symbol
)
1071 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
1072 struct elf_link_hash_entry
*);
1074 /* Modify any information related to dynamic linking such that the
1075 symbol is not exported. */
1076 void (*elf_backend_hide_symbol
)
1077 (struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd_boolean
);
1079 /* A function to do additional symbol fixup, called by
1080 _bfd_elf_fix_symbol_flags. */
1081 bfd_boolean (*elf_backend_fixup_symbol
)
1082 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
1084 /* Merge the backend specific symbol attribute. */
1085 void (*elf_backend_merge_symbol_attribute
)
1086 (struct elf_link_hash_entry
*, const Elf_Internal_Sym
*, bfd_boolean
,
1089 /* This function, if defined, will return a string containing the
1090 name of a target-specific dynamic tag. */
1091 char *(*elf_backend_get_target_dtag
)
1094 /* Decide whether an undefined symbol is special and can be ignored.
1095 This is the case for OPTIONAL symbols on IRIX. */
1096 bfd_boolean (*elf_backend_ignore_undef_symbol
)
1097 (struct elf_link_hash_entry
*);
1099 /* Emit relocations. Overrides default routine for emitting relocs,
1100 except during a relocatable link, or if all relocs are being emitted. */
1101 bfd_boolean (*elf_backend_emit_relocs
)
1102 (bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*,
1103 struct elf_link_hash_entry
**);
1105 /* Count relocations. Not called for relocatable links
1106 or if all relocs are being preserved in the output. */
1107 unsigned int (*elf_backend_count_relocs
)
1108 (struct bfd_link_info
*, asection
*);
1110 /* This function, if defined, is called when an NT_PRSTATUS note is found
1112 bfd_boolean (*elf_backend_grok_prstatus
)
1113 (bfd
*, Elf_Internal_Note
*);
1115 /* This function, if defined, is called when an NT_PSINFO or NT_PRPSINFO
1116 note is found in a core file. */
1117 bfd_boolean (*elf_backend_grok_psinfo
)
1118 (bfd
*, Elf_Internal_Note
*);
1120 /* This function, if defined, is called to write a note to a corefile. */
1121 char *(*elf_backend_write_core_note
)
1122 (bfd
*abfd
, char *buf
, int *bufsiz
, int note_type
, ...);
1124 /* This function, if defined, is called to convert target-specific
1125 section flag names into hex values. */
1126 flagword (*elf_backend_lookup_section_flags_hook
)
1129 /* This function returns class of a reloc type. */
1130 enum elf_reloc_type_class (*elf_backend_reloc_type_class
)
1131 (const Elf_Internal_Rela
*);
1133 /* This function, if defined, removes information about discarded functions
1134 from other sections which mention them. */
1135 bfd_boolean (*elf_backend_discard_info
)
1136 (bfd
*, struct elf_reloc_cookie
*, struct bfd_link_info
*);
1138 /* This function, if defined, signals that the function above has removed
1139 the discarded relocations for this section. */
1140 bfd_boolean (*elf_backend_ignore_discarded_relocs
)
1143 /* What to do when ld finds relocations against symbols defined in
1144 discarded sections. */
1145 unsigned int (*action_discarded
)
1148 /* This function returns the width of FDE pointers in bytes, or 0 if
1149 that can't be determined for some reason. The default definition
1150 goes by the bfd's EI_CLASS. */
1151 unsigned int (*elf_backend_eh_frame_address_size
)
1152 (bfd
*, asection
*);
1154 /* These functions tell elf-eh-frame whether to attempt to turn
1155 absolute or lsda encodings into pc-relative ones. The default
1156 definition enables these transformations. */
1157 bfd_boolean (*elf_backend_can_make_relative_eh_frame
)
1158 (bfd
*, struct bfd_link_info
*, asection
*);
1159 bfd_boolean (*elf_backend_can_make_lsda_relative_eh_frame
)
1160 (bfd
*, struct bfd_link_info
*, asection
*);
1162 /* This function returns an encoding after computing the encoded
1163 value (and storing it in ENCODED) for the given OFFSET into OSEC,
1164 to be stored in at LOC_OFFSET into the LOC_SEC input section.
1165 The default definition chooses a 32-bit PC-relative encoding. */
1166 bfd_byte (*elf_backend_encode_eh_address
)
1167 (bfd
*abfd
, struct bfd_link_info
*info
,
1168 asection
*osec
, bfd_vma offset
,
1169 asection
*loc_sec
, bfd_vma loc_offset
,
1172 /* This function, if defined, may write out the given section.
1173 Returns TRUE if it did so and FALSE if the caller should. */
1174 bfd_boolean (*elf_backend_write_section
)
1175 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
1177 /* The level of IRIX compatibility we're striving for.
1178 MIPS ELF specific function. */
1179 irix_compat_t (*elf_backend_mips_irix_compat
)
1182 reloc_howto_type
*(*elf_backend_mips_rtype_to_howto
)
1183 (unsigned int, bfd_boolean
);
1185 /* The swapping table to use when dealing with ECOFF information.
1186 Used for the MIPS ELF .mdebug section. */
1187 const struct ecoff_debug_swap
*elf_backend_ecoff_debug_swap
;
1189 /* This function implements `bfd_elf_bfd_from_remote_memory';
1190 see elf.c, elfcode.h. */
1191 bfd
*(*elf_backend_bfd_from_remote_memory
)
1192 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_vma
*loadbasep
,
1193 int (*target_read_memory
) (bfd_vma vma
, bfd_byte
*myaddr
,
1194 bfd_size_type len
));
1196 /* This function is used by `_bfd_elf_get_synthetic_symtab';
1198 bfd_vma (*plt_sym_val
) (bfd_vma
, const asection
*, const arelent
*);
1200 /* Is symbol defined in common section? */
1201 bfd_boolean (*common_definition
) (Elf_Internal_Sym
*);
1203 /* Return a common section index for section. */
1204 unsigned int (*common_section_index
) (asection
*);
1206 /* Return a common section for section. */
1207 asection
*(*common_section
) (asection
*);
1209 /* Return TRUE if we can merge 2 definitions. */
1210 bfd_boolean (*merge_symbol
) (struct bfd_link_info
*,
1211 struct elf_link_hash_entry
**,
1212 struct elf_link_hash_entry
*,
1213 Elf_Internal_Sym
*, asection
**,
1214 bfd_vma
*, unsigned int *,
1215 bfd_boolean
*, bfd_boolean
*,
1216 bfd_boolean
*, bfd_boolean
*,
1217 bfd_boolean
*, bfd_boolean
*,
1218 bfd_boolean
*, bfd_boolean
*,
1220 bfd_boolean
*, bfd_boolean
*,
1221 bfd_boolean
*, bfd_boolean
*,
1222 bfd
*, asection
**);
1224 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
1225 bfd_boolean (*elf_hash_symbol
) (struct elf_link_hash_entry
*);
1227 /* Return TRUE if type is a function symbol type. */
1228 bfd_boolean (*is_function_type
) (unsigned int type
);
1230 /* If the ELF symbol SYM might be a function in SEC, return the
1231 function size and set *CODE_OFF to the function's entry point,
1232 otherwise return zero. */
1233 bfd_size_type (*maybe_function_sym
) (const asymbol
*sym
, asection
*sec
,
1236 /* Used to handle bad SHF_LINK_ORDER input. */
1237 bfd_error_handler_type link_order_error_handler
;
1239 /* Name of the PLT relocation section. */
1240 const char *relplt_name
;
1242 /* Alternate EM_xxxx machine codes for this backend. */
1243 int elf_machine_alt1
;
1244 int elf_machine_alt2
;
1246 const struct elf_size_info
*s
;
1248 /* An array of target specific special sections. */
1249 const struct bfd_elf_special_section
*special_sections
;
1251 /* The size in bytes of the header for the GOT. This includes the
1252 so-called reserved entries on some systems. */
1253 bfd_vma got_header_size
;
1255 /* The size of the GOT entry for the symbol pointed to by H if non-NULL,
1256 otherwise by the local symbol with index SYMNDX in IBFD. */
1257 bfd_vma (*got_elt_size
) (bfd
*, struct bfd_link_info
*,
1258 struct elf_link_hash_entry
*h
,
1259 bfd
*ibfd
, unsigned long symndx
);
1261 /* The vendor name to use for a processor-standard attributes section. */
1262 const char *obj_attrs_vendor
;
1264 /* The section name to use for a processor-standard attributes section. */
1265 const char *obj_attrs_section
;
1267 /* Return 1, 2 or 3 to indicate what type of arguments a
1268 processor-specific tag takes. */
1269 int (*obj_attrs_arg_type
) (int);
1271 /* The section type to use for an attributes section. */
1272 unsigned int obj_attrs_section_type
;
1274 /* This function determines the order in which any attributes are
1275 written. It must be defined for input in the range
1276 LEAST_KNOWN_OBJ_ATTRIBUTE..NUM_KNOWN_OBJ_ATTRIBUTES-1 (this range
1277 is used in order to make unity easy). The returned value is the
1278 actual tag number to place in the input position. */
1279 int (*obj_attrs_order
) (int);
1281 /* Handle merging unknown attributes; either warn and return TRUE,
1282 or give an error and return FALSE. */
1283 bfd_boolean (*obj_attrs_handle_unknown
) (bfd
*, int);
1285 /* This is non-zero if static TLS segments require a special alignment. */
1286 unsigned static_tls_alignment
;
1288 /* This is TRUE if the linker should act like collect and gather
1289 global constructors and destructors by name. This is TRUE for
1290 MIPS ELF because the Irix 5 tools can not handle the .init
1292 unsigned collect
: 1;
1294 /* This is TRUE if the linker should ignore changes to the type of a
1295 symbol. This is TRUE for MIPS ELF because some Irix 5 objects
1296 record undefined functions as STT_OBJECT although the definitions
1298 unsigned type_change_ok
: 1;
1300 /* Whether the backend may use REL relocations. (Some backends use
1301 both REL and RELA relocations, and this flag is set for those
1303 unsigned may_use_rel_p
: 1;
1305 /* Whether the backend may use RELA relocations. (Some backends use
1306 both REL and RELA relocations, and this flag is set for those
1308 unsigned may_use_rela_p
: 1;
1310 /* Whether the default relocation type is RELA. If a backend with
1311 this flag set wants REL relocations for a particular section,
1312 it must note that explicitly. Similarly, if this flag is clear,
1313 and the backend wants RELA relocations for a particular
1315 unsigned default_use_rela_p
: 1;
1317 /* True if PLT and copy relocations should be RELA by default. */
1318 unsigned rela_plts_and_copies_p
: 1;
1320 /* Set if RELA relocations for a relocatable link can be handled by
1321 generic code. Backends that set this flag need do nothing in the
1322 backend relocate_section routine for relocatable linking. */
1323 unsigned rela_normal
: 1;
1325 /* TRUE if addresses "naturally" sign extend. This is used when
1326 swapping in from Elf32 when BFD64. */
1327 unsigned sign_extend_vma
: 1;
1329 unsigned want_got_plt
: 1;
1330 unsigned plt_readonly
: 1;
1331 unsigned want_plt_sym
: 1;
1332 unsigned plt_not_loaded
: 1;
1333 unsigned plt_alignment
: 4;
1334 unsigned can_gc_sections
: 1;
1335 unsigned can_refcount
: 1;
1336 unsigned want_got_sym
: 1;
1337 unsigned want_dynbss
: 1;
1339 /* Targets which do not support physical addressing often require
1340 that the p_paddr field in the section header to be set to zero.
1341 This field indicates whether this behavior is required. */
1342 unsigned want_p_paddr_set_to_zero
: 1;
1344 /* True if an object file lacking a .note.GNU-stack section
1345 should be assumed to be requesting exec stack. At least one
1346 other file in the link needs to have a .note.GNU-stack section
1347 for a PT_GNU_STACK segment to be created. */
1348 unsigned default_execstack
: 1;
1351 /* Information about reloc sections associated with a bfd_elf_section_data
1353 struct bfd_elf_section_reloc_data
1355 /* The ELF header for the reloc section associated with this
1357 Elf_Internal_Shdr
*hdr
;
1358 /* The number of relocations currently assigned to HDR. */
1360 /* The ELF section number of the reloc section. Only used for an
1363 /* Used by the backend linker to store the symbol hash table entries
1364 associated with relocs against global symbols. */
1365 struct elf_link_hash_entry
**hashes
;
1368 /* Information stored for each BFD section in an ELF file. This
1369 structure is allocated by elf_new_section_hook. */
1371 struct bfd_elf_section_data
1373 /* The ELF header for this section. */
1374 Elf_Internal_Shdr this_hdr
;
1376 /* INPUT_SECTION_FLAGS if specified in the linker script. */
1377 struct flag_info
*section_flag_info
;
1379 /* Information about the REL and RELA reloc sections associated
1380 with this section, if any. */
1381 struct bfd_elf_section_reloc_data rel
, rela
;
1383 /* The ELF section number of this section. */
1386 /* Used by the backend linker when generating a shared library to
1387 record the dynamic symbol index for a section symbol
1388 corresponding to this section. A value of 0 means that there is
1389 no dynamic symbol for this section. */
1392 /* A pointer to the linked-to section for SHF_LINK_ORDER. */
1393 asection
*linked_to
;
1395 /* A pointer to the swapped relocs. If the section uses REL relocs,
1396 rather than RELA, all the r_addend fields will be zero. This
1397 pointer may be NULL. It is used by the backend linker. */
1398 Elf_Internal_Rela
*relocs
;
1400 /* A pointer to a linked list tracking dynamic relocs copied for
1404 /* A pointer to the bfd section used for dynamic relocs. */
1408 /* Group name, if this section is a member of a group. */
1411 /* Group signature sym, if this is the SHT_GROUP section. */
1412 struct bfd_symbol
*id
;
1415 /* For a member of a group, points to the SHT_GROUP section.
1416 NULL for the SHT_GROUP section itself and non-group sections. */
1417 asection
*sec_group
;
1419 /* A linked list of member sections in the group. Circular when used by
1420 the linker. For the SHT_GROUP section, points at first member. */
1421 asection
*next_in_group
;
1423 /* The FDEs associated with this section. The u.fde.next_in_section
1424 field acts as a chain pointer. */
1425 struct eh_cie_fde
*fde_list
;
1427 /* A pointer used for various section optimizations. */
1431 #define elf_section_data(sec) ((struct bfd_elf_section_data*)(sec)->used_by_bfd)
1432 #define elf_linked_to_section(sec) (elf_section_data(sec)->linked_to)
1433 #define elf_section_type(sec) (elf_section_data(sec)->this_hdr.sh_type)
1434 #define elf_section_flags(sec) (elf_section_data(sec)->this_hdr.sh_flags)
1435 #define elf_group_name(sec) (elf_section_data(sec)->group.name)
1436 #define elf_group_id(sec) (elf_section_data(sec)->group.id)
1437 #define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group)
1438 #define elf_fde_list(sec) (elf_section_data(sec)->fde_list)
1439 #define elf_sec_group(sec) (elf_section_data(sec)->sec_group)
1441 #define xvec_get_elf_backend_data(xvec) \
1442 ((const struct elf_backend_data *) (xvec)->backend_data)
1444 #define get_elf_backend_data(abfd) \
1445 xvec_get_elf_backend_data ((abfd)->xvec)
1447 /* The least object attributes (within an attributes subsection) known
1448 for any target. Some code assumes that the value 0 is not used and
1449 the field for that attribute can instead be used as a marker to
1450 indicate that attributes have been initialized. */
1451 #define LEAST_KNOWN_OBJ_ATTRIBUTE 2
1453 /* The maximum number of known object attributes for any target. */
1454 #define NUM_KNOWN_OBJ_ATTRIBUTES 71
1456 /* The value of an object attribute. The type indicates whether the attribute
1457 holds and integer, a string, or both. It can also indicate that there can
1458 be no default (i.e. all values must be written to file, even zero). */
1460 typedef struct obj_attribute
1462 #define ATTR_TYPE_FLAG_INT_VAL (1 << 0)
1463 #define ATTR_TYPE_FLAG_STR_VAL (1 << 1)
1464 #define ATTR_TYPE_FLAG_NO_DEFAULT (1 << 2)
1466 #define ATTR_TYPE_HAS_INT_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_INT_VAL)
1467 #define ATTR_TYPE_HAS_STR_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_STR_VAL)
1468 #define ATTR_TYPE_HAS_NO_DEFAULT(TYPE) ((TYPE) & ATTR_TYPE_FLAG_NO_DEFAULT)
1475 typedef struct obj_attribute_list
1477 struct obj_attribute_list
*next
;
1480 } obj_attribute_list
;
1482 /* Object attributes may either be defined by the processor ABI, index
1483 OBJ_ATTR_PROC in the *_obj_attributes arrays, or be GNU-specific
1484 (and possibly also processor-specific), index OBJ_ATTR_GNU. */
1485 #define OBJ_ATTR_PROC 0
1486 #define OBJ_ATTR_GNU 1
1487 #define OBJ_ATTR_FIRST OBJ_ATTR_PROC
1488 #define OBJ_ATTR_LAST OBJ_ATTR_GNU
1490 /* The following object attribute tags are taken as generic, for all
1491 targets and for "gnu" where there is no target standard. */
1498 Tag_compatibility
= 32
1501 /* The following struct stores information about every SystemTap section
1502 found in the object file. */
1505 struct sdt_note
*next
;
1510 /* Some private data is stashed away for future use using the tdata pointer
1511 in the bfd structure. */
1513 struct elf_obj_tdata
1515 Elf_Internal_Ehdr elf_header
[1]; /* Actual data, but ref like ptr */
1516 Elf_Internal_Shdr
**elf_sect_ptr
;
1517 Elf_Internal_Phdr
*phdr
;
1518 struct elf_segment_map
*segment_map
;
1519 struct elf_strtab_hash
*strtab_ptr
;
1522 unsigned int num_elf_sections
; /* elf_sect_ptr size */
1523 int num_section_syms
;
1524 asymbol
**section_syms
; /* STT_SECTION symbols for each section */
1525 Elf_Internal_Shdr symtab_hdr
;
1526 Elf_Internal_Shdr shstrtab_hdr
;
1527 Elf_Internal_Shdr strtab_hdr
;
1528 Elf_Internal_Shdr dynsymtab_hdr
;
1529 Elf_Internal_Shdr dynstrtab_hdr
;
1530 Elf_Internal_Shdr dynversym_hdr
;
1531 Elf_Internal_Shdr dynverref_hdr
;
1532 Elf_Internal_Shdr dynverdef_hdr
;
1533 Elf_Internal_Shdr symtab_shndx_hdr
;
1534 unsigned int symtab_section
, shstrtab_section
;
1535 unsigned int strtab_section
, dynsymtab_section
;
1536 unsigned int symtab_shndx_section
;
1537 unsigned int dynversym_section
, dynverdef_section
, dynverref_section
;
1538 file_ptr next_file_pos
;
1539 bfd_vma gp
; /* The gp value */
1540 unsigned int gp_size
; /* The gp size */
1542 /* Information grabbed from an elf core file. */
1549 /* A mapping from external symbols to entries in the linker hash
1550 table, used when linking. This is indexed by the symbol index
1551 minus the sh_info field of the symbol table header. */
1552 struct elf_link_hash_entry
**sym_hashes
;
1554 /* Track usage and final offsets of GOT entries for local symbols.
1555 This array is indexed by symbol index. Elements are used
1556 identically to "got" in struct elf_link_hash_entry. */
1559 bfd_signed_vma
*refcounts
;
1561 struct got_entry
**ents
;
1564 /* The linker ELF emulation code needs to let the backend ELF linker
1565 know what filename should be used for a dynamic object if the
1566 dynamic object is found using a search. The emulation code then
1567 sometimes needs to know what name was actually used. Until the
1568 file has been added to the linker symbol table, this field holds
1569 the name the linker wants. After it has been added, it holds the
1570 name actually used, which will be the DT_SONAME entry if there is
1572 const char *dt_name
;
1574 /* The linker emulation needs to know what audit libs
1575 are used by a dynamic object. */
1576 const char *dt_audit
;
1578 /* Records the result of `get_program_header_size'. */
1579 bfd_size_type program_header_size
;
1581 /* Used by find_nearest_line entry point. */
1584 /* Used by MIPS ELF find_nearest_line entry point. The structure
1585 could be included directly in this one, but there's no point to
1586 wasting the memory just for the infrequently called
1587 find_nearest_line. */
1588 struct mips_elf_find_line
*find_line_info
;
1590 /* A place to stash dwarf1 info for this bfd. */
1591 struct dwarf1_debug
*dwarf1_find_line_info
;
1593 /* A place to stash dwarf2 info for this bfd. */
1594 void *dwarf2_find_line_info
;
1596 /* An array of stub sections indexed by symbol number, used by the
1597 MIPS ELF linker. FIXME: We should figure out some way to only
1598 include this field for a MIPS ELF target. */
1599 asection
**local_stubs
;
1600 asection
**local_call_stubs
;
1602 /* Used to determine if PT_GNU_EH_FRAME segment header should be
1604 asection
*eh_frame_hdr
;
1606 Elf_Internal_Shdr
**group_sect_ptr
;
1609 /* Number of symbol version definitions we are about to emit. */
1610 unsigned int cverdefs
;
1612 /* Number of symbol version references we are about to emit. */
1613 unsigned int cverrefs
;
1615 /* Segment flags for the PT_GNU_STACK segment. */
1616 unsigned int stack_flags
;
1618 /* Symbol version definitions in external objects. */
1619 Elf_Internal_Verdef
*verdef
;
1621 /* Symbol version references to external objects. */
1622 Elf_Internal_Verneed
*verref
;
1624 /* The Irix 5 support uses two virtual sections, which represent
1625 text/data symbols defined in dynamic objects. */
1626 asymbol
*elf_data_symbol
;
1627 asymbol
*elf_text_symbol
;
1628 asection
*elf_data_section
;
1629 asection
*elf_text_section
;
1631 /* A pointer to the .eh_frame section. */
1632 asection
*eh_frame_section
;
1634 /* Whether a dyanmic object was specified normally on the linker
1635 command line, or was specified when --as-needed was in effect,
1636 or was found via a DT_NEEDED entry. */
1637 enum dynamic_lib_link_class dyn_lib_class
;
1639 /* This is set to TRUE if the object was created by the backend
1643 /* Irix 5 often screws up the symbol table, sorting local symbols
1644 after global symbols. This flag is set if the symbol table in
1645 this BFD appears to be screwed up. If it is, we ignore the
1646 sh_info field in the symbol table header, and always read all the
1648 bfd_boolean bad_symtab
;
1650 /* Used to determine if the e_flags field has been initialized */
1651 bfd_boolean flags_init
;
1653 /* Symbol buffer. */
1656 obj_attribute known_obj_attributes
[2][NUM_KNOWN_OBJ_ATTRIBUTES
];
1657 obj_attribute_list
*other_obj_attributes
[2];
1659 /* Called at the end of _bfd_elf_write_object_contents if not NULL. */
1660 bfd_boolean (*after_write_object_contents
) (bfd
*);
1661 void *after_write_object_contents_info
;
1663 /* NT_GNU_BUILD_ID note type. */
1664 bfd_size_type build_id_size
;
1667 /* Linked-list containing information about every Systemtap section
1668 found in the object file. Each section corresponds to one entry
1670 struct sdt_note
*sdt_note_head
;
1672 /* True if the bfd contains symbols that have the STT_GNU_IFUNC
1673 symbol type or STB_GNU_UNIQUE binding. Used to set the osabi
1674 field in the ELF header structure. */
1675 bfd_boolean has_gnu_symbols
;
1677 /* An identifier used to distinguish different target
1678 specific extensions to this structure. */
1679 enum elf_target_id object_id
;
1682 #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
1684 #define elf_object_id(bfd) (elf_tdata(bfd) -> object_id)
1685 #define elf_program_header_size(bfd) (elf_tdata(bfd) -> program_header_size)
1686 #define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header)
1687 #define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr)
1688 #define elf_numsections(bfd) (elf_tdata(bfd) -> num_elf_sections)
1689 #define elf_shstrtab(bfd) (elf_tdata(bfd) -> strtab_ptr)
1690 #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section)
1691 #define elf_symtab_shndx(bfd) (elf_tdata(bfd) -> symtab_shndx_section)
1692 #define elf_symtab_hdr(bfd) (elf_tdata(bfd) -> symtab_hdr)
1693 #define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section)
1694 #define elf_dynversym(bfd) (elf_tdata(bfd) -> dynversym_section)
1695 #define elf_dynverdef(bfd) (elf_tdata(bfd) -> dynverdef_section)
1696 #define elf_dynverref(bfd) (elf_tdata(bfd) -> dynverref_section)
1697 #define elf_eh_frame_section(bfd) \
1698 (elf_tdata(bfd) -> eh_frame_section)
1699 #define elf_num_locals(bfd) (elf_tdata(bfd) -> num_locals)
1700 #define elf_num_globals(bfd) (elf_tdata(bfd) -> num_globals)
1701 #define elf_section_syms(bfd) (elf_tdata(bfd) -> section_syms)
1702 #define elf_num_section_syms(bfd) (elf_tdata(bfd) -> num_section_syms)
1703 #define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
1704 #define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
1705 #define elf_gp(bfd) (elf_tdata(bfd) -> gp)
1706 #define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size)
1707 #define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes)
1708 #define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts)
1709 #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets)
1710 #define elf_local_got_ents(bfd) (elf_tdata(bfd) -> local_got.ents)
1711 #define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name)
1712 #define elf_dt_audit(bfd) (elf_tdata(bfd) -> dt_audit)
1713 #define elf_dyn_lib_class(bfd) (elf_tdata(bfd) -> dyn_lib_class)
1714 #define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab)
1715 #define elf_flags_init(bfd) (elf_tdata(bfd) -> flags_init)
1716 #define elf_known_obj_attributes(bfd) (elf_tdata (bfd) -> known_obj_attributes)
1717 #define elf_other_obj_attributes(bfd) (elf_tdata (bfd) -> other_obj_attributes)
1718 #define elf_known_obj_attributes_proc(bfd) \
1719 (elf_known_obj_attributes (bfd) [OBJ_ATTR_PROC])
1720 #define elf_other_obj_attributes_proc(bfd) \
1721 (elf_other_obj_attributes (bfd) [OBJ_ATTR_PROC])
1723 extern void _bfd_elf_swap_verdef_in
1724 (bfd
*, const Elf_External_Verdef
*, Elf_Internal_Verdef
*);
1725 extern void _bfd_elf_swap_verdef_out
1726 (bfd
*, const Elf_Internal_Verdef
*, Elf_External_Verdef
*);
1727 extern void _bfd_elf_swap_verdaux_in
1728 (bfd
*, const Elf_External_Verdaux
*, Elf_Internal_Verdaux
*);
1729 extern void _bfd_elf_swap_verdaux_out
1730 (bfd
*, const Elf_Internal_Verdaux
*, Elf_External_Verdaux
*);
1731 extern void _bfd_elf_swap_verneed_in
1732 (bfd
*, const Elf_External_Verneed
*, Elf_Internal_Verneed
*);
1733 extern void _bfd_elf_swap_verneed_out
1734 (bfd
*, const Elf_Internal_Verneed
*, Elf_External_Verneed
*);
1735 extern void _bfd_elf_swap_vernaux_in
1736 (bfd
*, const Elf_External_Vernaux
*, Elf_Internal_Vernaux
*);
1737 extern void _bfd_elf_swap_vernaux_out
1738 (bfd
*, const Elf_Internal_Vernaux
*, Elf_External_Vernaux
*);
1739 extern void _bfd_elf_swap_versym_in
1740 (bfd
*, const Elf_External_Versym
*, Elf_Internal_Versym
*);
1741 extern void _bfd_elf_swap_versym_out
1742 (bfd
*, const Elf_Internal_Versym
*, Elf_External_Versym
*);
1744 extern unsigned int _bfd_elf_section_from_bfd_section
1745 (bfd
*, asection
*);
1746 extern char *bfd_elf_string_from_elf_section
1747 (bfd
*, unsigned, unsigned);
1748 extern Elf_Internal_Sym
*bfd_elf_get_elf_syms
1749 (bfd
*, Elf_Internal_Shdr
*, size_t, size_t, Elf_Internal_Sym
*, void *,
1750 Elf_External_Sym_Shndx
*);
1751 extern const char *bfd_elf_sym_name
1752 (bfd
*, Elf_Internal_Shdr
*, Elf_Internal_Sym
*, asection
*);
1754 extern bfd_boolean _bfd_elf_copy_private_bfd_data
1756 extern bfd_boolean _bfd_elf_print_private_bfd_data
1758 extern void bfd_elf_print_symbol
1759 (bfd
*, void *, asymbol
*, bfd_print_symbol_type
);
1761 extern unsigned int _bfd_elf_eh_frame_address_size
1762 (bfd
*, asection
*);
1763 extern bfd_byte _bfd_elf_encode_eh_address
1764 (bfd
*abfd
, struct bfd_link_info
*info
, asection
*osec
, bfd_vma offset
,
1765 asection
*loc_sec
, bfd_vma loc_offset
, bfd_vma
*encoded
);
1766 extern bfd_boolean _bfd_elf_can_make_relative
1767 (bfd
*input_bfd
, struct bfd_link_info
*info
, asection
*eh_frame_section
);
1769 extern enum elf_reloc_type_class _bfd_elf_reloc_type_class
1770 (const Elf_Internal_Rela
*);
1771 extern bfd_vma _bfd_elf_rela_local_sym
1772 (bfd
*, Elf_Internal_Sym
*, asection
**, Elf_Internal_Rela
*);
1773 extern bfd_vma _bfd_elf_rel_local_sym
1774 (bfd
*, Elf_Internal_Sym
*, asection
**, bfd_vma
);
1775 extern bfd_vma _bfd_elf_section_offset
1776 (bfd
*, struct bfd_link_info
*, asection
*, bfd_vma
);
1778 extern unsigned long bfd_elf_hash
1780 extern unsigned long bfd_elf_gnu_hash
1783 extern bfd_reloc_status_type bfd_elf_generic_reloc
1784 (bfd
*, arelent
*, asymbol
*, void *, asection
*, bfd
*, char **);
1785 extern bfd_boolean bfd_elf_allocate_object
1786 (bfd
*, size_t, enum elf_target_id
);
1787 extern bfd_boolean bfd_elf_make_object
1789 extern bfd_boolean bfd_elf_mkcorefile
1791 extern bfd_boolean _bfd_elf_make_section_from_shdr
1792 (bfd
*, Elf_Internal_Shdr
*, const char *, int);
1793 extern bfd_boolean _bfd_elf_make_section_from_phdr
1794 (bfd
*, Elf_Internal_Phdr
*, int, const char *);
1795 extern struct bfd_hash_entry
*_bfd_elf_link_hash_newfunc
1796 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *);
1797 extern struct bfd_link_hash_table
*_bfd_elf_link_hash_table_create
1799 extern void _bfd_elf_link_hash_copy_indirect
1800 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
1801 struct elf_link_hash_entry
*);
1802 extern void _bfd_elf_link_hash_hide_symbol
1803 (struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd_boolean
);
1804 extern bfd_boolean _bfd_elf_link_hash_fixup_symbol
1805 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
1806 extern bfd_boolean _bfd_elf_link_hash_table_init
1807 (struct elf_link_hash_table
*, bfd
*,
1808 struct bfd_hash_entry
*(*)
1809 (struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *),
1810 unsigned int, enum elf_target_id
);
1811 extern bfd_boolean _bfd_elf_slurp_version_tables
1812 (bfd
*, bfd_boolean
);
1813 extern bfd_boolean _bfd_elf_merge_sections
1814 (bfd
*, struct bfd_link_info
*);
1815 extern bfd_boolean _bfd_elf_match_sections_by_type
1816 (bfd
*, const asection
*, bfd
*, const asection
*);
1817 extern bfd_boolean bfd_elf_is_group_section
1818 (bfd
*, const struct bfd_section
*);
1819 extern bfd_boolean _bfd_elf_section_already_linked
1820 (bfd
*, asection
*, struct bfd_link_info
*);
1821 extern void bfd_elf_set_group_contents
1822 (bfd
*, asection
*, void *);
1823 extern asection
*_bfd_elf_check_kept_section
1824 (asection
*, struct bfd_link_info
*);
1825 #define _bfd_elf_link_just_syms _bfd_generic_link_just_syms
1826 extern void _bfd_elf_copy_link_hash_symbol_type
1827 (bfd
*, struct bfd_link_hash_entry
*, struct bfd_link_hash_entry
*);
1828 extern bfd_boolean _bfd_elf_size_group_sections
1829 (struct bfd_link_info
*);
1830 extern bfd_boolean _bfd_elf_fixup_group_sections
1831 (bfd
*, asection
*);
1832 extern bfd_boolean _bfd_elf_copy_private_header_data
1834 extern bfd_boolean _bfd_elf_copy_private_symbol_data
1835 (bfd
*, asymbol
*, bfd
*, asymbol
*);
1836 #define _bfd_generic_init_private_section_data \
1837 _bfd_elf_init_private_section_data
1838 extern bfd_boolean _bfd_elf_init_private_section_data
1839 (bfd
*, asection
*, bfd
*, asection
*, struct bfd_link_info
*);
1840 extern bfd_boolean _bfd_elf_copy_private_section_data
1841 (bfd
*, asection
*, bfd
*, asection
*);
1842 extern bfd_boolean _bfd_elf_write_object_contents
1844 extern bfd_boolean _bfd_elf_write_corefile_contents
1846 extern bfd_boolean _bfd_elf_set_section_contents
1847 (bfd
*, sec_ptr
, const void *, file_ptr
, bfd_size_type
);
1848 extern long _bfd_elf_get_symtab_upper_bound
1850 extern long _bfd_elf_canonicalize_symtab
1851 (bfd
*, asymbol
**);
1852 extern long _bfd_elf_get_dynamic_symtab_upper_bound
1854 extern long _bfd_elf_canonicalize_dynamic_symtab
1855 (bfd
*, asymbol
**);
1856 extern long _bfd_elf_get_synthetic_symtab
1857 (bfd
*, long, asymbol
**, long, asymbol
**, asymbol
**);
1858 extern long _bfd_elf_get_reloc_upper_bound
1860 extern long _bfd_elf_canonicalize_reloc
1861 (bfd
*, sec_ptr
, arelent
**, asymbol
**);
1862 extern asection
* _bfd_elf_get_dynamic_reloc_section
1863 (bfd
*, asection
*, bfd_boolean
);
1864 extern asection
* _bfd_elf_make_dynamic_reloc_section
1865 (asection
*, bfd
*, unsigned int, bfd
*, bfd_boolean
);
1866 extern long _bfd_elf_get_dynamic_reloc_upper_bound
1868 extern long _bfd_elf_canonicalize_dynamic_reloc
1869 (bfd
*, arelent
**, asymbol
**);
1870 extern asymbol
*_bfd_elf_make_empty_symbol
1872 extern void _bfd_elf_get_symbol_info
1873 (bfd
*, asymbol
*, symbol_info
*);
1874 extern bfd_boolean _bfd_elf_is_local_label_name
1875 (bfd
*, const char *);
1876 extern alent
*_bfd_elf_get_lineno
1878 extern bfd_boolean _bfd_elf_set_arch_mach
1879 (bfd
*, enum bfd_architecture
, unsigned long);
1880 extern bfd_boolean _bfd_elf_find_nearest_line
1881 (bfd
*, asection
*, asymbol
**, bfd_vma
, const char **, const char **,
1883 extern bfd_boolean _bfd_elf_find_nearest_line_discriminator
1884 (bfd
*, asection
*, asymbol
**, bfd_vma
, const char **, const char **,
1885 unsigned int *, unsigned int *);
1886 extern bfd_boolean _bfd_elf_find_line
1887 (bfd
*, asymbol
**, asymbol
*, const char **, unsigned int *);
1888 extern bfd_boolean _bfd_elf_find_line_discriminator
1889 (bfd
*, asymbol
**, asymbol
*, const char **, unsigned int *, unsigned int *);
1890 #define _bfd_generic_find_line _bfd_elf_find_line
1891 #define _bfd_generic_find_nearest_line_discriminator \
1892 _bfd_elf_find_nearest_line_discriminator
1893 extern bfd_boolean _bfd_elf_find_inliner_info
1894 (bfd
*, const char **, const char **, unsigned int *);
1895 #define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols
1896 #define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
1897 extern int _bfd_elf_sizeof_headers
1898 (bfd
*, struct bfd_link_info
*);
1899 extern bfd_boolean _bfd_elf_new_section_hook
1900 (bfd
*, asection
*);
1901 extern bfd_boolean _bfd_elf_init_reloc_shdr
1902 (bfd
*, struct bfd_elf_section_reloc_data
*, asection
*, bfd_boolean
);
1903 extern const struct bfd_elf_special_section
*_bfd_elf_get_special_section
1904 (const char *, const struct bfd_elf_special_section
*, unsigned int);
1905 extern const struct bfd_elf_special_section
*_bfd_elf_get_sec_type_attr
1906 (bfd
*, asection
*);
1908 /* If the target doesn't have reloc handling written yet: */
1909 extern void _bfd_elf_no_info_to_howto
1910 (bfd
*, arelent
*, Elf_Internal_Rela
*);
1912 extern bfd_boolean bfd_section_from_shdr
1913 (bfd
*, unsigned int shindex
);
1914 extern bfd_boolean bfd_section_from_phdr
1915 (bfd
*, Elf_Internal_Phdr
*, int);
1917 extern int _bfd_elf_symbol_from_bfd_symbol
1918 (bfd
*, asymbol
**);
1920 extern Elf_Internal_Sym
*bfd_sym_from_r_symndx
1921 (struct sym_cache
*, bfd
*, unsigned long);
1922 extern asection
*bfd_section_from_elf_index
1923 (bfd
*, unsigned int);
1924 extern struct bfd_strtab_hash
*_bfd_elf_stringtab_init
1927 extern struct elf_strtab_hash
* _bfd_elf_strtab_init
1929 extern void _bfd_elf_strtab_free
1930 (struct elf_strtab_hash
*);
1931 extern bfd_size_type _bfd_elf_strtab_add
1932 (struct elf_strtab_hash
*, const char *, bfd_boolean
);
1933 extern void _bfd_elf_strtab_addref
1934 (struct elf_strtab_hash
*, bfd_size_type
);
1935 extern void _bfd_elf_strtab_delref
1936 (struct elf_strtab_hash
*, bfd_size_type
);
1937 extern void _bfd_elf_strtab_clear_all_refs
1938 (struct elf_strtab_hash
*);
1939 extern bfd_size_type _bfd_elf_strtab_size
1940 (struct elf_strtab_hash
*);
1941 extern bfd_size_type _bfd_elf_strtab_offset
1942 (struct elf_strtab_hash
*, bfd_size_type
);
1943 extern bfd_boolean _bfd_elf_strtab_emit
1944 (bfd
*, struct elf_strtab_hash
*);
1945 extern void _bfd_elf_strtab_finalize
1946 (struct elf_strtab_hash
*);
1948 extern void _bfd_elf_begin_eh_frame_parsing
1949 (struct bfd_link_info
*info
);
1950 extern void _bfd_elf_parse_eh_frame
1951 (bfd
*, struct bfd_link_info
*, asection
*, struct elf_reloc_cookie
*);
1952 extern void _bfd_elf_end_eh_frame_parsing
1953 (struct bfd_link_info
*info
);
1955 extern bfd_boolean _bfd_elf_discard_section_eh_frame
1956 (bfd
*, struct bfd_link_info
*, asection
*,
1957 bfd_boolean (*) (bfd_vma
, void *), struct elf_reloc_cookie
*);
1958 extern bfd_boolean _bfd_elf_discard_section_eh_frame_hdr
1959 (bfd
*, struct bfd_link_info
*);
1960 extern bfd_vma _bfd_elf_eh_frame_section_offset
1961 (bfd
*, struct bfd_link_info
*, asection
*, bfd_vma
);
1962 extern bfd_boolean _bfd_elf_write_section_eh_frame
1963 (bfd
*, struct bfd_link_info
*, asection
*, bfd_byte
*);
1964 extern bfd_boolean _bfd_elf_write_section_eh_frame_hdr
1965 (bfd
*, struct bfd_link_info
*);
1966 extern bfd_boolean _bfd_elf_eh_frame_present
1967 (struct bfd_link_info
*);
1968 extern bfd_boolean _bfd_elf_maybe_strip_eh_frame_hdr
1969 (struct bfd_link_info
*);
1971 extern bfd_boolean _bfd_elf_merge_symbol
1972 (bfd
*, struct bfd_link_info
*, const char *, Elf_Internal_Sym
*,
1973 asection
**, bfd_vma
*, unsigned int *,
1974 struct elf_link_hash_entry
**, bfd_boolean
*,
1975 bfd_boolean
*, bfd_boolean
*, bfd_boolean
*);
1977 extern bfd_boolean
_bfd_elf_hash_symbol (struct elf_link_hash_entry
*);
1979 extern long _bfd_elf_link_lookup_local_dynindx
1980 (struct bfd_link_info
*, bfd
*, long);
1981 extern bfd_boolean _bfd_elf_compute_section_file_positions
1982 (bfd
*, struct bfd_link_info
*);
1983 extern void _bfd_elf_assign_file_positions_for_relocs
1985 extern file_ptr _bfd_elf_assign_file_position_for_section
1986 (Elf_Internal_Shdr
*, file_ptr
, bfd_boolean
);
1988 extern bfd_boolean _bfd_elf_validate_reloc
1991 extern bfd_boolean _bfd_elf_link_create_dynamic_sections
1992 (bfd
*, struct bfd_link_info
*);
1993 extern bfd_boolean _bfd_elf_link_omit_section_dynsym
1994 (bfd
*, struct bfd_link_info
*, asection
*);
1995 extern bfd_boolean _bfd_elf_create_dynamic_sections
1996 (bfd
*, struct bfd_link_info
*);
1997 extern bfd_boolean _bfd_elf_create_got_section
1998 (bfd
*, struct bfd_link_info
*);
1999 extern struct elf_link_hash_entry
*_bfd_elf_define_linkage_sym
2000 (bfd
*, struct bfd_link_info
*, asection
*, const char *);
2001 extern void _bfd_elf_init_1_index_section
2002 (bfd
*, struct bfd_link_info
*);
2003 extern void _bfd_elf_init_2_index_sections
2004 (bfd
*, struct bfd_link_info
*);
2006 extern bfd_boolean _bfd_elfcore_make_pseudosection
2007 (bfd
*, char *, size_t, ufile_ptr
);
2008 extern char *_bfd_elfcore_strndup
2009 (bfd
*, char *, size_t);
2011 extern Elf_Internal_Rela
*_bfd_elf_link_read_relocs
2012 (bfd
*, asection
*, void *, Elf_Internal_Rela
*, bfd_boolean
);
2014 extern bfd_boolean _bfd_elf_link_output_relocs
2015 (bfd
*, asection
*, Elf_Internal_Shdr
*, Elf_Internal_Rela
*,
2016 struct elf_link_hash_entry
**);
2018 extern bfd_boolean _bfd_elf_adjust_dynamic_copy
2019 (struct elf_link_hash_entry
*, asection
*);
2021 extern bfd_boolean _bfd_elf_dynamic_symbol_p
2022 (struct elf_link_hash_entry
*, struct bfd_link_info
*, bfd_boolean
);
2024 extern bfd_boolean _bfd_elf_symbol_refs_local_p
2025 (struct elf_link_hash_entry
*, struct bfd_link_info
*, bfd_boolean
);
2027 extern bfd_reloc_status_type bfd_elf_perform_complex_relocation
2028 (bfd
*, asection
*, bfd_byte
*, Elf_Internal_Rela
*, bfd_vma
);
2030 extern bfd_boolean _bfd_elf_setup_sections
2033 extern void _bfd_elf_set_osabi (bfd
* , struct bfd_link_info
*);
2035 extern const bfd_target
*bfd_elf32_object_p
2037 extern const bfd_target
*bfd_elf32_core_file_p
2039 extern char *bfd_elf32_core_file_failing_command
2041 extern int bfd_elf32_core_file_failing_signal
2043 extern bfd_boolean bfd_elf32_core_file_matches_executable_p
2045 extern int bfd_elf32_core_file_pid
2048 extern bfd_boolean bfd_elf32_swap_symbol_in
2049 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
2050 extern void bfd_elf32_swap_symbol_out
2051 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
2052 extern void bfd_elf32_swap_reloc_in
2053 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2054 extern void bfd_elf32_swap_reloc_out
2055 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2056 extern void bfd_elf32_swap_reloca_in
2057 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2058 extern void bfd_elf32_swap_reloca_out
2059 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2060 extern void bfd_elf32_swap_phdr_in
2061 (bfd
*, const Elf32_External_Phdr
*, Elf_Internal_Phdr
*);
2062 extern void bfd_elf32_swap_phdr_out
2063 (bfd
*, const Elf_Internal_Phdr
*, Elf32_External_Phdr
*);
2064 extern void bfd_elf32_swap_dyn_in
2065 (bfd
*, const void *, Elf_Internal_Dyn
*);
2066 extern void bfd_elf32_swap_dyn_out
2067 (bfd
*, const Elf_Internal_Dyn
*, void *);
2068 extern long bfd_elf32_slurp_symbol_table
2069 (bfd
*, asymbol
**, bfd_boolean
);
2070 extern bfd_boolean bfd_elf32_write_shdrs_and_ehdr
2072 extern int bfd_elf32_write_out_phdrs
2073 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
2074 extern bfd_boolean bfd_elf32_checksum_contents
2075 (bfd
* , void (*) (const void *, size_t, void *), void *);
2076 extern void bfd_elf32_write_relocs
2077 (bfd
*, asection
*, void *);
2078 extern bfd_boolean bfd_elf32_slurp_reloc_table
2079 (bfd
*, asection
*, asymbol
**, bfd_boolean
);
2081 extern const bfd_target
*bfd_elf64_object_p
2083 extern const bfd_target
*bfd_elf64_core_file_p
2085 extern char *bfd_elf64_core_file_failing_command
2087 extern int bfd_elf64_core_file_failing_signal
2089 extern bfd_boolean bfd_elf64_core_file_matches_executable_p
2091 extern int bfd_elf64_core_file_pid
2094 extern bfd_boolean bfd_elf64_swap_symbol_in
2095 (bfd
*, const void *, const void *, Elf_Internal_Sym
*);
2096 extern void bfd_elf64_swap_symbol_out
2097 (bfd
*, const Elf_Internal_Sym
*, void *, void *);
2098 extern void bfd_elf64_swap_reloc_in
2099 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2100 extern void bfd_elf64_swap_reloc_out
2101 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2102 extern void bfd_elf64_swap_reloca_in
2103 (bfd
*, const bfd_byte
*, Elf_Internal_Rela
*);
2104 extern void bfd_elf64_swap_reloca_out
2105 (bfd
*, const Elf_Internal_Rela
*, bfd_byte
*);
2106 extern void bfd_elf64_swap_phdr_in
2107 (bfd
*, const Elf64_External_Phdr
*, Elf_Internal_Phdr
*);
2108 extern void bfd_elf64_swap_phdr_out
2109 (bfd
*, const Elf_Internal_Phdr
*, Elf64_External_Phdr
*);
2110 extern void bfd_elf64_swap_dyn_in
2111 (bfd
*, const void *, Elf_Internal_Dyn
*);
2112 extern void bfd_elf64_swap_dyn_out
2113 (bfd
*, const Elf_Internal_Dyn
*, void *);
2114 extern long bfd_elf64_slurp_symbol_table
2115 (bfd
*, asymbol
**, bfd_boolean
);
2116 extern bfd_boolean bfd_elf64_write_shdrs_and_ehdr
2118 extern int bfd_elf64_write_out_phdrs
2119 (bfd
*, const Elf_Internal_Phdr
*, unsigned int);
2120 extern bfd_boolean bfd_elf64_checksum_contents
2121 (bfd
* , void (*) (const void *, size_t, void *), void *);
2122 extern void bfd_elf64_write_relocs
2123 (bfd
*, asection
*, void *);
2124 extern bfd_boolean bfd_elf64_slurp_reloc_table
2125 (bfd
*, asection
*, asymbol
**, bfd_boolean
);
2127 extern bfd_boolean _bfd_elf_default_relocs_compatible
2128 (const bfd_target
*, const bfd_target
*);
2130 extern bfd_boolean _bfd_elf_relocs_compatible
2131 (const bfd_target
*, const bfd_target
*);
2133 extern struct elf_link_hash_entry
*_bfd_elf_archive_symbol_lookup
2134 (bfd
*, struct bfd_link_info
*, const char *);
2135 extern bfd_boolean bfd_elf_link_add_symbols
2136 (bfd
*, struct bfd_link_info
*);
2137 extern bfd_boolean _bfd_elf_add_dynamic_entry
2138 (struct bfd_link_info
*, bfd_vma
, bfd_vma
);
2140 extern bfd_boolean bfd_elf_link_record_dynamic_symbol
2141 (struct bfd_link_info
*, struct elf_link_hash_entry
*);
2143 extern int bfd_elf_link_record_local_dynamic_symbol
2144 (struct bfd_link_info
*, bfd
*, long);
2146 extern bfd_boolean _bfd_elf_close_and_cleanup
2149 extern bfd_boolean _bfd_elf_common_definition
2150 (Elf_Internal_Sym
*);
2152 extern unsigned int _bfd_elf_common_section_index
2155 extern asection
*_bfd_elf_common_section
2158 extern bfd_vma _bfd_elf_default_got_elt_size
2159 (bfd
*, struct bfd_link_info
*, struct elf_link_hash_entry
*, bfd
*,
2162 extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn
2163 (bfd
*, arelent
*, struct bfd_symbol
*, void *,
2164 asection
*, bfd
*, char **);
2166 extern bfd_boolean bfd_elf_final_link
2167 (bfd
*, struct bfd_link_info
*);
2169 extern void _bfd_elf_gc_keep
2170 (struct bfd_link_info
*info
);
2172 extern bfd_boolean bfd_elf_gc_mark_dynamic_ref_symbol
2173 (struct elf_link_hash_entry
*h
, void *inf
);
2175 extern bfd_boolean bfd_elf_gc_sections
2176 (bfd
*, struct bfd_link_info
*);
2178 extern bfd_boolean bfd_elf_gc_record_vtinherit
2179 (bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
);
2181 extern bfd_boolean bfd_elf_gc_record_vtentry
2182 (bfd
*, asection
*, struct elf_link_hash_entry
*, bfd_vma
);
2184 extern asection
*_bfd_elf_gc_mark_hook
2185 (asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
2186 struct elf_link_hash_entry
*, Elf_Internal_Sym
*);
2188 extern asection
*_bfd_elf_gc_mark_rsec
2189 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
,
2190 struct elf_reloc_cookie
*);
2192 extern bfd_boolean _bfd_elf_gc_mark_reloc
2193 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
,
2194 struct elf_reloc_cookie
*);
2196 extern bfd_boolean _bfd_elf_gc_mark_fdes
2197 (struct bfd_link_info
*, asection
*, asection
*, elf_gc_mark_hook_fn
,
2198 struct elf_reloc_cookie
*);
2200 extern bfd_boolean _bfd_elf_gc_mark
2201 (struct bfd_link_info
*, asection
*, elf_gc_mark_hook_fn
);
2203 extern bfd_boolean _bfd_elf_gc_mark_extra_sections
2204 (struct bfd_link_info
*, elf_gc_mark_hook_fn
);
2206 extern bfd_boolean bfd_elf_gc_common_finalize_got_offsets
2207 (bfd
*, struct bfd_link_info
*);
2209 extern bfd_boolean bfd_elf_gc_common_final_link
2210 (bfd
*, struct bfd_link_info
*);
2212 extern bfd_boolean bfd_elf_reloc_symbol_deleted_p
2215 extern struct elf_segment_map
* _bfd_elf_make_dynamic_segment
2216 (bfd
*, asection
*);
2218 extern bfd_boolean _bfd_elf_map_sections_to_segments
2219 (bfd
*, struct bfd_link_info
*);
2221 extern bfd_boolean
_bfd_elf_is_function_type (unsigned int);
2223 extern bfd_size_type
_bfd_elf_maybe_function_sym (const asymbol
*, asection
*,
2226 extern int bfd_elf_get_default_section_type (flagword
);
2228 extern bfd_boolean bfd_elf_lookup_section_flags
2229 (struct bfd_link_info
*, struct flag_info
*, asection
*);
2231 extern Elf_Internal_Phdr
* _bfd_elf_find_segment_containing_section
2232 (bfd
* abfd
, asection
* section
);
2234 /* Exported interface for writing elf corefile notes. */
2235 extern char *elfcore_write_note
2236 (bfd
*, char *, int *, const char *, int, const void *, int);
2237 extern char *elfcore_write_prpsinfo
2238 (bfd
*, char *, int *, const char *, const char *);
2239 extern char *elfcore_write_prstatus
2240 (bfd
*, char *, int *, long, int, const void *);
2241 extern char * elfcore_write_pstatus
2242 (bfd
*, char *, int *, long, int, const void *);
2243 extern char *elfcore_write_prfpreg
2244 (bfd
*, char *, int *, const void *, int);
2245 extern char *elfcore_write_prxfpreg
2246 (bfd
*, char *, int *, const void *, int);
2247 extern char *elfcore_write_xstatereg
2248 (bfd
*, char *, int *, const void *, int);
2249 extern char *elfcore_write_ppc_vmx
2250 (bfd
*, char *, int *, const void *, int);
2251 extern char *elfcore_write_ppc_vsx
2252 (bfd
*, char *, int *, const void *, int);
2253 extern char *elfcore_write_s390_timer
2254 (bfd
*, char *, int *, const void *, int);
2255 extern char *elfcore_write_s390_todcmp
2256 (bfd
*, char *, int *, const void *, int);
2257 extern char *elfcore_write_s390_todpreg
2258 (bfd
*, char *, int *, const void *, int);
2259 extern char *elfcore_write_s390_ctrs
2260 (bfd
*, char *, int *, const void *, int);
2261 extern char *elfcore_write_s390_prefix
2262 (bfd
*, char *, int *, const void *, int);
2263 extern char *elfcore_write_s390_last_break
2264 (bfd
*, char *, int *, const void *, int);
2265 extern char *elfcore_write_s390_system_call
2266 (bfd
*, char *, int *, const void *, int);
2267 extern char *elfcore_write_arm_vfp
2268 (bfd
*, char *, int *, const void *, int);
2269 extern char *elfcore_write_lwpstatus
2270 (bfd
*, char *, int *, long, int, const void *);
2271 extern char *elfcore_write_register_note
2272 (bfd
*, char *, int *, const char *, const void *, int);
2274 extern bfd
*_bfd_elf32_bfd_from_remote_memory
2275 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_vma
*loadbasep
,
2276 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, bfd_size_type
));
2277 extern bfd
*_bfd_elf64_bfd_from_remote_memory
2278 (bfd
*templ
, bfd_vma ehdr_vma
, bfd_vma
*loadbasep
,
2279 int (*target_read_memory
) (bfd_vma
, bfd_byte
*, bfd_size_type
));
2281 extern bfd_vma
bfd_elf_obj_attr_size (bfd
*);
2282 extern void bfd_elf_set_obj_attr_contents (bfd
*, bfd_byte
*, bfd_vma
);
2283 extern int bfd_elf_get_obj_attr_int (bfd
*, int, int);
2284 extern void bfd_elf_add_obj_attr_int (bfd
*, int, int, unsigned int);
2285 #define bfd_elf_add_proc_attr_int(BFD, TAG, VALUE) \
2286 bfd_elf_add_obj_attr_int ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2287 extern void bfd_elf_add_obj_attr_string (bfd
*, int, int, const char *);
2288 #define bfd_elf_add_proc_attr_string(BFD, TAG, VALUE) \
2289 bfd_elf_add_obj_attr_string ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2290 extern void bfd_elf_add_obj_attr_int_string (bfd
*, int, int, unsigned int,
2292 #define bfd_elf_add_proc_attr_int_string(BFD, TAG, INTVAL, STRVAL) \
2293 bfd_elf_add_obj_attr_int_string ((BFD), OBJ_ATTR_PROC, (TAG), \
2296 extern char *_bfd_elf_attr_strdup (bfd
*, const char *);
2297 extern void _bfd_elf_copy_obj_attributes (bfd
*, bfd
*);
2298 extern int _bfd_elf_obj_attrs_arg_type (bfd
*, int, int);
2299 extern void _bfd_elf_parse_attributes (bfd
*, Elf_Internal_Shdr
*);
2300 extern bfd_boolean
_bfd_elf_merge_object_attributes (bfd
*, bfd
*);
2301 extern bfd_boolean
_bfd_elf_merge_unknown_attribute_low (bfd
*, bfd
*, int);
2302 extern bfd_boolean
_bfd_elf_merge_unknown_attribute_list (bfd
*, bfd
*);
2303 extern Elf_Internal_Shdr
*_bfd_elf_single_rel_hdr (asection
*sec
);
2305 /* The linker may need to keep track of the number of relocs that it
2306 decides to copy as dynamic relocs in check_relocs for each symbol.
2307 This is so that it can later discard them if they are found to be
2308 unnecessary. We can store the information in a field extending the
2309 regular ELF linker hash table. */
2311 struct elf_dyn_relocs
2313 struct elf_dyn_relocs
*next
;
2315 /* The input section of the reloc. */
2318 /* Total number of relocs copied for the input section. */
2319 bfd_size_type count
;
2321 /* Number of pc-relative relocs copied for the input section. */
2322 bfd_size_type pc_count
;
2325 extern bfd_boolean _bfd_elf_create_ifunc_sections
2326 (bfd
*, struct bfd_link_info
*);
2327 extern asection
* _bfd_elf_create_ifunc_dyn_reloc
2328 (bfd
*, struct bfd_link_info
*, asection
*sec
, asection
*sreloc
,
2329 struct elf_dyn_relocs
**);
2330 extern bfd_boolean _bfd_elf_allocate_ifunc_dyn_relocs
2331 (struct bfd_link_info
*, struct elf_link_hash_entry
*,
2332 struct elf_dyn_relocs
**, unsigned int, unsigned int);
2334 extern void elf_append_rela (bfd
*, asection
*, Elf_Internal_Rela
*);
2335 extern void elf_append_rel (bfd
*, asection
*, Elf_Internal_Rela
*);
2337 extern bfd_vma
elf64_r_info (bfd_vma
, bfd_vma
);
2338 extern bfd_vma
elf64_r_sym (bfd_vma
);
2339 extern bfd_vma
elf32_r_info (bfd_vma
, bfd_vma
);
2340 extern bfd_vma
elf32_r_sym (bfd_vma
);
2342 /* Large common section. */
2343 extern asection _bfd_elf_large_com_section
;
2345 /* Hash for local symbol with the first section id, ID, in the input
2346 file and the local symbol index, SYM. */
2347 #define ELF_LOCAL_SYMBOL_HASH(ID, SYM) \
2348 (((((ID) & 0xff) << 24) | (((ID) & 0xff00) << 8)) \
2349 ^ (SYM) ^ ((ID) >> 16))
2351 /* This is the condition under which finish_dynamic_symbol will be called.
2352 If our finish_dynamic_symbol isn't called, we'll need to do something
2353 about initializing any .plt and .got entries in relocate_section. */
2354 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
2356 && ((SHARED) || !(H)->forced_local) \
2357 && ((H)->dynindx != -1 || (H)->forced_local))
2359 /* This macro is to avoid lots of duplicated code in the body
2360 of xxx_relocate_section() in the various elfxx-xxxx.c files. */
2361 #define RELOC_FOR_GLOBAL_SYMBOL(info, input_bfd, input_section, rel, \
2362 r_symndx, symtab_hdr, sym_hashes, \
2363 h, sec, relocation, \
2364 unresolved_reloc, warned) \
2367 /* It seems this can happen with erroneous or unsupported \
2368 input (mixing a.out and elf in an archive, for example.) */ \
2369 if (sym_hashes == NULL) \
2372 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; \
2374 while (h->root.type == bfd_link_hash_indirect \
2375 || h->root.type == bfd_link_hash_warning) \
2376 h = (struct elf_link_hash_entry *) h->root.u.i.link; \
2379 unresolved_reloc = FALSE; \
2381 if (h->root.type == bfd_link_hash_defined \
2382 || h->root.type == bfd_link_hash_defweak) \
2384 sec = h->root.u.def.section; \
2386 || sec->output_section == NULL) \
2387 /* Set a flag that will be cleared later if we find a \
2388 relocation value for this symbol. output_section \
2389 is typically NULL for symbols satisfied by a shared \
2391 unresolved_reloc = TRUE; \
2393 relocation = (h->root.u.def.value \
2394 + sec->output_section->vma \
2395 + sec->output_offset); \
2397 else if (h->root.type == bfd_link_hash_undefweak) \
2399 else if (info->unresolved_syms_in_objects == RM_IGNORE \
2400 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) \
2402 else if (!info->relocatable) \
2405 err = (info->unresolved_syms_in_objects == RM_GENERATE_ERROR \
2406 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT); \
2407 if (!info->callbacks->undefined_symbol (info, \
2408 h->root.root.string, \
2411 rel->r_offset, err)) \
2415 (void) unresolved_reloc; \
2420 /* This macro is to avoid lots of duplicated code in the body of the
2421 loop over relocations in xxx_relocate_section() in the various
2424 Handle relocations against symbols from removed linkonce sections,
2425 or sections discarded by a linker script. When doing a relocatable
2426 link, we remove such relocations. Otherwise, we just want the
2427 section contents zeroed and avoid any special processing. */
2428 #define RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
2429 rel, count, relend, \
2430 howto, index, contents) \
2433 _bfd_clear_contents (howto, input_bfd, input_section, \
2434 contents + rel[index].r_offset); \
2436 if (info->relocatable \
2437 && (input_section->flags & SEC_DEBUGGING)) \
2439 /* Only remove relocations in debug sections since other \
2440 sections may require relocations. */ \
2441 Elf_Internal_Shdr *rel_hdr; \
2443 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
2445 /* Avoid empty output section. */ \
2446 if (rel_hdr->sh_size > count * rel_hdr->sh_entsize) \
2448 rel_hdr->sh_size -= count * rel_hdr->sh_entsize; \
2449 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
2450 rel_hdr->sh_size -= count * rel_hdr->sh_entsize; \
2452 memmove (rel, rel + count, \
2453 (relend - rel - count) * sizeof (*rel)); \
2455 input_section->reloc_count -= count; \
2462 for (i_ = 0; i_ < count; i_++) \
2464 rel[i_].r_info = 0; \
2465 rel[i_].r_addend = 0; \
2471 /* Will a symbol be bound to the definition within the shared
2472 library, if any. A unique symbol can never be bound locally. */
2473 #define SYMBOLIC_BIND(INFO, H) \
2474 (!(H)->unique_global \
2475 && ((INFO)->symbolic || ((INFO)->dynamic && !(H)->dynamic)))
2477 #endif /* _LIBELF_H_ */