1 /* BFD back-end data structures for ELF files.
2 Copyright (C) 1992-2017 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 /* Length of augmentation. aug_str_len is the length of the
330 string including null terminator. aug_data_len is the length
331 of the rest up to the initial insns. */
332 unsigned int aug_str_len : 3;
333 unsigned int aug_data_len : 5;
335 /* True if we have marked relocations associated with this CIE. */
336 unsigned int gc_mark : 1;
338 /* True if we have decided to turn an absolute LSDA encoding into
339 a PC-relative one. */
340 unsigned int make_lsda_relative : 1;
342 /* True if we have decided to turn an absolute personality
343 encoding into a PC-relative one. */
344 unsigned int make_per_encoding_relative : 1;
346 /* True if the CIE contains personality data and if that
347 data uses a PC-relative encoding. Always true when
348 make_per_encoding_relative is. */
349 unsigned int per_encoding_relative : 1;
351 /* True if the CIE contains personality data aligned to a
352 multiple of eight bytes. */
353 unsigned int per_encoding_aligned8 : 1;
355 /* True if we need to add an 'R' (FDE encoding) entry to the
356 CIE's augmentation data. */
357 unsigned int add_fde_encoding : 1;
359 /* True if we have merged this CIE with another. */
360 unsigned int merged : 1;
363 unsigned int pad1 : 9;
366 unsigned int reloc_index;
369 unsigned int new_offset;
370 unsigned int fde_encoding : 8;
371 unsigned int lsda_encoding : 8;
372 unsigned int lsda_offset : 8;
374 /* True if this entry represents a CIE, false if it represents an FDE. */
375 unsigned int cie : 1;
377 /* True if this entry is currently marked for removal. */
378 unsigned int removed : 1;
380 /* True if we need to add a 'z' (augmentation size) entry to the CIE's
381 augmentation data, and an associated byte to each of the CIE's FDEs. */
382 unsigned int add_augmentation_size : 1;
384 /* True if we have decided to convert absolute FDE relocations into
385 relative ones. This applies to the first relocation in the FDE,
386 which is against the code that the FDE describes. */
387 unsigned int make_relative : 1;
390 unsigned int pad1 : 4;
392 unsigned int *set_loc;
395 struct eh_frame_sec_info
399 struct eh_cie_fde entry[1];
402 struct eh_frame_array_ent
411 #define DWARF2_EH_HDR 1
412 #define COMPACT_EH_HDR 2
414 /* Endian-neutral code indicating that a function cannot be unwound. */
415 #define COMPACT_EH_CANT_UNWIND_OPCODE 0x015d5d01
417 struct dwarf_eh_frame_hdr_info
420 unsigned int fde_count;
421 /* TRUE if .eh_frame_hdr should contain the sorted search table.
422 We build it if we successfully read all .eh_frame input sections
423 and recognize them. */
425 struct eh_frame_array_ent *array;
428 struct compact_eh_frame_hdr_info
430 unsigned int allocated_entries;
431 /* eh_frame_entry fragments. */
435 struct eh_frame_hdr_info
438 unsigned int array_count;
439 bfd_boolean frame_hdr_is_compact;
442 struct dwarf_eh_frame_hdr_info dwarf;
443 struct compact_eh_frame_hdr_info compact;
448 /* Enum used to identify target specific extensions to the elf_obj_tdata
449 and elf_link_hash_table structures. Note the enums deliberately start
450 from 1 so that we can detect an uninitialized field. The generic value
451 is last so that additions to this enum do not need to modify more than
455 AARCH64_ELF_DATA = 1,
495 struct elf_sym_strtab
497 Elf_Internal_Sym sym;
498 unsigned long dest_index;
499 unsigned long destshndx_index;
502 /* ELF linker hash table. */
504 struct elf_link_hash_table
506 struct bfd_link_hash_table root;
508 /* An identifier used to distinguish different target
509 specific extensions to this structure. */
510 enum elf_target_id hash_table_id;
512 /* Whether we have created the special dynamic sections required
513 when linking against or generating a shared object. */
514 bfd_boolean dynamic_sections_created;
516 /* True if this target has relocatable executables, so needs dynamic
518 bfd_boolean is_relocatable_executable;
520 /* The BFD used to hold special sections created by the linker.
521 This will be the first BFD found which requires these sections to
525 /* The value to use when initialising got.refcount/offset and
526 plt.refcount/offset in an elf_link_hash_entry. Set to zero when
527 the values are refcounts. Set to init_got_offset/init_plt_offset
528 in size_dynamic_sections when the values may be offsets. */
529 union gotplt_union init_got_refcount;
530 union gotplt_union init_plt_refcount;
532 /* The value to use for got.refcount/offset and plt.refcount/offset
533 when the values may be offsets. Normally (bfd_vma) -1. */
534 union gotplt_union init_got_offset;
535 union gotplt_union init_plt_offset;
537 /* The number of symbols found in the link which is intended for the
538 mandatory DT_SYMTAB tag (.dynsym section) in .dynamic section. */
539 bfd_size_type dynsymcount;
540 bfd_size_type local_dynsymcount;
542 /* The string table of dynamic symbols, which becomes the .dynstr
544 struct elf_strtab_hash *dynstr;
546 /* The number of symbol strings found in the link which must be put
547 into the .strtab section. */
548 bfd_size_type strtabcount;
550 /* The array size of the symbol string table, which becomes the
552 bfd_size_type strtabsize;
554 /* The array of strings, which becomes the .strtab section. */
555 struct elf_sym_strtab *strtab;
557 /* The number of buckets in the hash table in the .hash section.
558 This is based on the number of dynamic symbols. */
559 bfd_size_type bucketcount;
561 /* A linked list of DT_NEEDED names found in dynamic objects
562 included in the link. */
563 struct bfd_link_needed_list *needed;
565 /* Sections in the output bfd that provides a section symbol
566 to be used by relocations emitted against local symbols.
567 Most targets will not use data_index_section. */
568 asection *text_index_section;
569 asection *data_index_section;
571 /* The _GLOBAL_OFFSET_TABLE_ symbol. */
572 struct elf_link_hash_entry *hgot;
574 /* The _PROCEDURE_LINKAGE_TABLE_ symbol. */
575 struct elf_link_hash_entry *hplt;
577 /* The _DYNAMIC symbol. */
578 struct elf_link_hash_entry *hdynamic;
580 /* A pointer to information used to merge SEC_MERGE sections. */
583 /* Used to link stabs in sections. */
584 struct stab_info stab_info;
586 /* Used by eh_frame code when editing .eh_frame. */
587 struct eh_frame_hdr_info eh_info;
589 /* A linked list of local symbols to be added to .dynsym. */
590 struct elf_link_local_dynamic_entry *dynlocal;
592 /* A linked list of DT_RPATH/DT_RUNPATH names found in dynamic
593 objects included in the link. */
594 struct bfd_link_needed_list *runpath;
596 /* Cached first output tls section and size of PT_TLS segment. */
598 bfd_size_type tls_size;
600 /* A linked list of BFD's loaded in the link. */
601 struct elf_link_loaded_list *loaded;
603 /* Short-cuts to get to dynamic linker sections. */
612 asection *sreldynrelro;
620 /* Look up an entry in an ELF linker hash table. */
622 #define elf_link_hash_lookup(table, string, create, copy, follow) \
623 ((struct elf_link_hash_entry *) \
624 bfd_link_hash_lookup (&(table)->root, (string), (create), \
627 /* Traverse an ELF linker hash table. */
629 #define elf_link_hash_traverse(table, func, info) \
630 (bfd_link_hash_traverse \
632 (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func), \
635 /* Get the ELF linker hash table from a link_info structure. */
637 #define elf_hash_table(p) ((struct elf_link_hash_table *) ((p)->hash))
639 #define elf_hash_table_id(table) ((table) -> hash_table_id)
641 /* Returns TRUE if the hash table is a struct elf_link_hash_table. */
642 #define is_elf_hash_table(htab) \
643 (((struct bfd_link_hash_table *) (htab))->type == bfd_link_elf_hash_table)
645 /* Used by bfd_sym_from_r_symndx to cache a small number of local
647 #define LOCAL_SYM_CACHE_SIZE 32
651 unsigned long indx[LOCAL_SYM_CACHE_SIZE];
652 Elf_Internal_Sym sym[LOCAL_SYM_CACHE_SIZE];
655 /* Constant information held for an ELF backend. */
657 struct elf_size_info {
658 unsigned char sizeof_ehdr, sizeof_phdr, sizeof_shdr;
659 unsigned char sizeof_rel, sizeof_rela, sizeof_sym, sizeof_dyn, sizeof_note;
661 /* The size of entries in the .hash section. */
662 unsigned char sizeof_hash_entry;
664 /* The number of internal relocations to allocate per external
666 unsigned char int_rels_per_ext_rel;
667 /* We use some fixed size arrays. This should be large enough to
668 handle all back-ends. */
669 #define MAX_INT_RELS_PER_EXT_REL 3
671 unsigned char arch_size, log_file_align;
672 unsigned char elfclass, ev_current;
673 int (*write_out_phdrs)
674 (bfd *, const Elf_Internal_Phdr *, unsigned int);
676 (*write_shdrs_and_ehdr) (bfd *);
677 bfd_boolean (*checksum_contents)
678 (bfd * , void (*) (const void *, size_t, void *), void *);
680 (bfd *, asection *, void *);
681 bfd_boolean (*swap_symbol_in)
682 (bfd *, const void *, const void *, Elf_Internal_Sym *);
683 void (*swap_symbol_out)
684 (bfd *, const Elf_Internal_Sym *, void *, void *);
685 bfd_boolean (*slurp_reloc_table)
686 (bfd *, asection *, asymbol **, bfd_boolean);
687 long (*slurp_symbol_table)
688 (bfd *, asymbol **, bfd_boolean);
690 (bfd *, const void *, Elf_Internal_Dyn *);
692 (bfd *, const Elf_Internal_Dyn *, void *);
694 /* This function is called to swap in a REL relocation. If an
695 external relocation corresponds to more than one internal
696 relocation, then all relocations are swapped in at once. */
697 void (*swap_reloc_in)
698 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
700 /* This function is called to swap out a REL relocation. */
701 void (*swap_reloc_out)
702 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
704 /* This function is called to swap in a RELA relocation. If an
705 external relocation corresponds to more than one internal
706 relocation, then all relocations are swapped in at once. */
707 void (*swap_reloca_in)
708 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
710 /* This function is called to swap out a RELA relocation. */
711 void (*swap_reloca_out)
712 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
715 #define elf_symbol_from(ABFD,S) \
716 (((S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \
717 && (S)->the_bfd->tdata.elf_obj_data != 0) \
718 ? (elf_symbol_type *) (S) \
721 enum elf_reloc_type_class {
723 reloc_class_relative,
729 struct elf_reloc_cookie
731 Elf_Internal_Rela *rels, *rel, *relend;
732 Elf_Internal_Sym *locsyms;
736 struct elf_link_hash_entry **sym_hashes;
738 bfd_boolean bad_symtab;
741 /* The level of IRIX compatibility we're striving for. */
749 /* Mapping of ELF section names and types. */
750 struct bfd_elf_special_section
753 unsigned int prefix_length;
754 /* 0 means name must match PREFIX exactly.
755 -1 means name must start with PREFIX followed by an arbitrary string.
756 -2 means name must match PREFIX exactly or consist of PREFIX followed
757 by a dot then anything.
758 > 0 means name must start with the first PREFIX_LENGTH chars of
759 PREFIX and finish with the last SUFFIX_LENGTH chars of PREFIX. */
760 signed int suffix_length;
765 enum action_discarded
771 typedef asection * (*elf_gc_mark_hook_fn)
772 (asection *, struct bfd_link_info *, Elf_Internal_Rela *,
773 struct elf_link_hash_entry *, Elf_Internal_Sym *);
775 enum elf_property_kind
777 /* A new property. */
778 property_unknown = 0,
779 /* A property ignored by backend. */
781 /* A corrupt property reported by backend. */
783 /* A property should be removed due to property merge. */
785 /* A property which is a number. */
789 typedef struct elf_property
791 unsigned int pr_type;
792 unsigned int pr_datasz;
795 /* For property_number, this is a number. */
797 /* Add a new one if elf_property_kind is updated. */
799 enum elf_property_kind pr_kind;
802 typedef struct elf_property_list
804 struct elf_property_list *next;
805 struct elf_property property;
808 struct bfd_elf_section_reloc_data;
810 struct elf_backend_data
812 /* The architecture for this backend. */
813 enum bfd_architecture arch;
815 /* An identifier used to distinguish different target specific
816 extensions to elf_obj_tdata and elf_link_hash_table structures. */
817 enum elf_target_id target_id;
819 /* The ELF machine code (EM_xxxx) for this backend. */
820 int elf_machine_code;
825 /* The maximum page size for this backend. */
828 /* The minimum page size for this backend. An input object will not be
829 considered page aligned unless its sections are correctly aligned for
830 pages at least this large. May be smaller than maxpagesize. */
833 /* The common page size for this backend. */
834 bfd_vma commonpagesize;
836 /* The BFD flags applied to sections created for dynamic linking. */
837 flagword dynamic_sec_flags;
839 /* Architecture-specific data for this backend.
840 This is actually a pointer to some type like struct elf_ARCH_data. */
841 const void *arch_data;
843 /* A function to translate an ELF RELA relocation to a BFD arelent
845 void (*elf_info_to_howto)
846 (bfd *, arelent *, Elf_Internal_Rela *);
848 /* A function to translate an ELF REL relocation to a BFD arelent
850 void (*elf_info_to_howto_rel)
851 (bfd *, arelent *, Elf_Internal_Rela *);
853 /* A function to determine whether a symbol is global when
854 partitioning the symbol table into local and global symbols.
855 This should be NULL for most targets, in which case the correct
856 thing will be done. MIPS ELF, at least on the Irix 5, has
857 special requirements. */
858 bfd_boolean (*elf_backend_sym_is_global)
861 /* The remaining functions are hooks which are called only if they
864 /* A function to permit a backend specific check on whether a
865 particular BFD format is relevant for an object file, and to
866 permit the backend to set any global information it wishes. When
867 this is called elf_elfheader is set, but anything else should be
868 used with caution. If this returns FALSE, the check_format
869 routine will return a bfd_error_wrong_format error. */
870 bfd_boolean (*elf_backend_object_p)
873 /* A function to do additional symbol processing when reading the
874 ELF symbol table. This is where any processor-specific special
875 section indices are handled. */
876 void (*elf_backend_symbol_processing)
879 /* A function to do additional symbol processing after reading the
880 entire ELF symbol table. */
881 bfd_boolean (*elf_backend_symbol_table_processing)
882 (bfd *, elf_symbol_type *, unsigned int);
884 /* A function to set the type of the info field. Processor-specific
885 types should be handled here. */
886 int (*elf_backend_get_symbol_type)
887 (Elf_Internal_Sym *, int);
889 /* A function to return the linker hash table entry of a symbol that
890 might be satisfied by an archive symbol. */
891 struct elf_link_hash_entry * (*elf_backend_archive_symbol_lookup)
892 (bfd *, struct bfd_link_info *, const char *);
894 /* Return true if local section symbols should have a non-null st_name.
895 NULL implies false. */
896 bfd_boolean (*elf_backend_name_local_section_symbols)
899 /* A function to do additional processing on the ELF section header
900 just before writing it out. This is used to set the flags and
901 type fields for some sections, or to actually write out data for
903 bfd_boolean (*elf_backend_section_processing)
904 (bfd *, Elf_Internal_Shdr *);
906 /* A function to handle unusual section types when creating BFD
907 sections from ELF sections. */
908 bfd_boolean (*elf_backend_section_from_shdr)
909 (bfd *, Elf_Internal_Shdr *, const char *, int);
911 /* A function to convert machine dependent ELF section header flags to
912 BFD internal section header flags. */
913 bfd_boolean (*elf_backend_section_flags)
914 (flagword *, const Elf_Internal_Shdr *);
916 /* A function that returns a struct containing ELF section flags and
917 type for the given BFD section. */
918 const struct bfd_elf_special_section * (*get_sec_type_attr)
921 /* A function to handle unusual program segment types when creating BFD
922 sections from ELF program segments. */
923 bfd_boolean (*elf_backend_section_from_phdr)
924 (bfd *, Elf_Internal_Phdr *, int, const char *);
926 /* A function to set up the ELF section header for a BFD section in
927 preparation for writing it out. This is where the flags and type
928 fields are set for unusual sections. */
929 bfd_boolean (*elf_backend_fake_sections)
930 (bfd *, Elf_Internal_Shdr *, asection *);
932 /* A function to get the ELF section index for a BFD section. If
933 this returns TRUE, the section was found. If it is a normal ELF
934 section, *RETVAL should be left unchanged. If it is not a normal
935 ELF section *RETVAL should be set to the SHN_xxxx index. */
936 bfd_boolean (*elf_backend_section_from_bfd_section)
937 (bfd *, asection *, int *retval);
939 /* If this field is not NULL, it is called by the add_symbols phase
940 of a link just before adding a symbol to the global linker hash
941 table. It may modify any of the fields as it wishes. If *NAME
942 is set to NULL, the symbol will be skipped rather than being
943 added to the hash table. This function is responsible for
944 handling all processor dependent symbol bindings and section
945 indices, and must set at least *FLAGS and *SEC for each processor
946 dependent case; failure to do so will cause a link error. */
947 bfd_boolean (*elf_add_symbol_hook)
948 (bfd *abfd, struct bfd_link_info *info, Elf_Internal_Sym *,
949 const char **name, flagword *flags, asection **sec, bfd_vma *value);
951 /* If this field is not NULL, it is called by the elf_link_output_sym
952 phase of a link for each symbol which will appear in the object file.
953 On error, this function returns 0. 1 is returned when the symbol
954 should be output, 2 is returned when the symbol should be discarded. */
955 int (*elf_backend_link_output_symbol_hook)
956 (struct bfd_link_info *info, const char *, Elf_Internal_Sym *,
957 asection *, struct elf_link_hash_entry *);
959 /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend
960 linker the first time it encounters a dynamic object in the link.
961 This function must create any sections required for dynamic
962 linking. The ABFD argument is a dynamic object. The .interp,
963 .dynamic, .dynsym, .dynstr, and .hash functions have already been
964 created, and this function may modify the section flags if
965 desired. This function will normally create the .got and .plt
966 sections, but different backends have different requirements. */
967 bfd_boolean (*elf_backend_create_dynamic_sections)
968 (bfd *abfd, struct bfd_link_info *info);
970 /* When creating a shared library, determine whether to omit the
971 dynamic symbol for the section. */
972 bfd_boolean (*elf_backend_omit_section_dynsym)
973 (bfd *output_bfd, struct bfd_link_info *info, asection *osec);
975 /* Return TRUE if relocations of targets are compatible to the extent
976 that CHECK_RELOCS will properly process them. PR 4424. */
977 bfd_boolean (*relocs_compatible) (const bfd_target *, const bfd_target *);
979 /* The CHECK_RELOCS function is called by the add_symbols phase of
980 the ELF backend linker. It is called once for each section with
981 relocs of an object file, just after the symbols for the object
982 file have been added to the global linker hash table. The
983 function must look through the relocs and do any special handling
984 required. This generally means allocating space in the global
985 offset table, and perhaps allocating space for a reloc. The
986 relocs are always passed as Rela structures; if the section
987 actually uses Rel structures, the r_addend field will always be
989 bfd_boolean (*check_relocs)
990 (bfd *abfd, struct bfd_link_info *info, asection *o,
991 const Elf_Internal_Rela *relocs);
993 /* The CHECK_DIRECTIVES function is called once per input file by
994 the add_symbols phase of the ELF backend linker. The function
995 must inspect the bfd and create any additional symbols according
996 to any custom directives in the bfd. */
997 bfd_boolean (*check_directives)
998 (bfd *abfd, struct bfd_link_info *info);
1000 /* The NOTICE_AS_NEEDED function is called as the linker is about to
1001 handle an as-needed lib (ACT = notice_as_needed), and after the
1002 linker has decided to keep the lib (ACT = notice_needed) or when
1003 the lib is not needed (ACT = notice_not_needed). */
1004 bfd_boolean (*notice_as_needed)
1005 (bfd *abfd, struct bfd_link_info *info, enum notice_asneeded_action act);
1007 /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
1008 linker for every symbol which is defined by a dynamic object and
1009 referenced by a regular object. This is called after all the
1010 input files have been seen, but before the SIZE_DYNAMIC_SECTIONS
1011 function has been called. The hash table entry should be
1012 bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be
1013 defined in a section from a dynamic object. Dynamic object
1014 sections are not included in the final link, and this function is
1015 responsible for changing the value to something which the rest of
1016 the link can deal with. This will normally involve adding an
1017 entry to the .plt or .got or some such section, and setting the
1018 symbol to point to that. */
1019 bfd_boolean (*elf_backend_adjust_dynamic_symbol)
1020 (struct bfd_link_info *info, struct elf_link_hash_entry *h);
1022 /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker
1023 after all the linker input files have been seen but before the
1024 section sizes have been set. This is called after
1025 ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS. */
1026 bfd_boolean (*elf_backend_always_size_sections)
1027 (bfd *output_bfd, struct bfd_link_info *info);
1029 /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend
1030 linker after all the linker input files have been seen but before
1031 the sections sizes have been set. This is called after
1032 ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols.
1033 It is only called when linking against a dynamic object. It must
1034 set the sizes of the dynamic sections, and may fill in their
1035 contents as well. The generic ELF linker can handle the .dynsym,
1036 .dynstr and .hash sections. This function must handle the
1037 .interp section and any sections created by the
1038 CREATE_DYNAMIC_SECTIONS entry point. */
1039 bfd_boolean (*elf_backend_size_dynamic_sections)
1040 (bfd *output_bfd, struct bfd_link_info *info);
1042 /* Set TEXT_INDEX_SECTION and DATA_INDEX_SECTION, the output sections
1043 we keep to use as a base for relocs and symbols. */
1044 void (*elf_backend_init_index_section)
1045 (bfd *output_bfd, struct bfd_link_info *info);
1047 /* The RELOCATE_SECTION function is called by the ELF backend linker
1048 to handle the relocations for a section.
1050 The relocs are always passed as Rela structures; if the section
1051 actually uses Rel structures, the r_addend field will always be
1054 This function is responsible for adjust the section contents as
1055 necessary, and (if using Rela relocs and generating a
1056 relocatable output file) adjusting the reloc addend as
1059 This function does not have to worry about setting the reloc
1060 address or the reloc symbol index.
1062 LOCAL_SYMS is a pointer to the swapped in local symbols.
1064 LOCAL_SECTIONS is an array giving the section in the input file
1065 corresponding to the st_shndx field of each local symbol.
1067 The global hash table entry for the global symbols can be found
1068 via elf_sym_hashes (input_bfd).
1070 When generating relocatable output, this function must handle
1071 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
1072 going to be the section symbol corresponding to the output
1073 section, which means that the addend must be adjusted
1076 Returns FALSE on error, TRUE on success, 2 if successful and
1077 relocations should be written for this section. */
1078 int (*elf_backend_relocate_section)
1079 (bfd *output_bfd, struct bfd_link_info *info, bfd *input_bfd,
1080 asection *input_section, bfd_byte *contents, Elf_Internal_Rela *relocs,
1081 Elf_Internal_Sym *local_syms, asection **local_sections);
1083 /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend
1084 linker just before it writes a symbol out to the .dynsym section.
1085 The processor backend may make any required adjustment to the
1086 symbol. It may also take the opportunity to set contents of the
1087 dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on
1088 all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called
1089 on those symbols which are defined by a dynamic object. */
1090 bfd_boolean (*elf_backend_finish_dynamic_symbol)
1091 (bfd *output_bfd, struct bfd_link_info *info,
1092 struct elf_link_hash_entry *h, Elf_Internal_Sym *sym);
1094 /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend
1095 linker just before it writes all the dynamic sections out to the
1096 output file. The FINISH_DYNAMIC_SYMBOL will have been called on
1097 all dynamic symbols. */
1098 bfd_boolean (*elf_backend_finish_dynamic_sections)
1099 (bfd *output_bfd, struct bfd_link_info *info);
1101 /* A function to do any beginning processing needed for the ELF file
1102 before building the ELF headers and computing file positions. */
1103 void (*elf_backend_begin_write_processing)
1104 (bfd *, struct bfd_link_info *);
1106 /* A function to do any final processing needed for the ELF file
1107 before writing it out. The LINKER argument is TRUE if this BFD
1108 was created by the ELF backend linker. */
1109 void (*elf_backend_final_write_processing)
1110 (bfd *, bfd_boolean linker);
1112 /* This function is called by get_program_header_size. It should
1113 return the number of additional program segments which this BFD
1114 will need. It should return -1 on error. */
1115 int (*elf_backend_additional_program_headers)
1116 (bfd *, struct bfd_link_info *);
1118 /* This function is called to modify an existing segment map in a
1119 backend specific fashion. */
1120 bfd_boolean (*elf_backend_modify_segment_map)
1121 (bfd *, struct bfd_link_info *);
1123 /* This function is called to modify program headers just before
1124 they are written. */
1125 bfd_boolean (*elf_backend_modify_program_headers)
1126 (bfd *, struct bfd_link_info *);
1128 /* This function is called to see if the PHDR header should be
1129 checked for validity. */
1130 bfd_boolean (*elf_backend_allow_non_load_phdr)
1131 (bfd *, const Elf_Internal_Phdr *, unsigned);
1133 /* This function is called before section garbage collection to
1134 mark entry symbol sections. */
1136 (struct bfd_link_info *);
1138 /* This function is called during section garbage collection to
1139 mark sections that define global symbols. */
1140 bfd_boolean (*gc_mark_dynamic_ref)
1141 (struct elf_link_hash_entry *, void *);
1143 /* This function is called during section gc to discover the section a
1144 particular relocation refers to. */
1145 elf_gc_mark_hook_fn gc_mark_hook;
1147 /* This function, if defined, is called after the first gc marking pass
1148 to allow the backend to mark additional sections. */
1149 bfd_boolean (*gc_mark_extra_sections)
1150 (struct bfd_link_info *, elf_gc_mark_hook_fn);
1152 /* This function, if defined, is called during the sweep phase of gc
1153 in order that a backend might update any data structures it might
1155 bfd_boolean (*gc_sweep_hook)
1156 (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *);
1158 /* This function, if defined, is called after the ELF headers have
1159 been created. This allows for things like the OS and ABI versions
1161 void (*elf_backend_post_process_headers)
1162 (bfd *, struct bfd_link_info *);
1164 /* This function, if defined, prints a symbol to file and returns the
1165 name of the symbol to be printed. It should return NULL to fall
1166 back to default symbol printing. */
1167 const char *(*elf_backend_print_symbol_all)
1168 (bfd *, void *, asymbol *);
1170 /* This function, if defined, is called after all local symbols and
1171 global symbols converted to locals are emitted into the symtab
1172 section. It allows the backend to emit special local symbols
1173 not handled in the hash table. */
1174 bfd_boolean (*elf_backend_output_arch_local_syms)
1175 (bfd *, struct bfd_link_info *, void *,
1176 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym *, asection *,
1177 struct elf_link_hash_entry *));
1179 /* This function, if defined, is called after all symbols are emitted
1180 into the symtab section. It allows the backend to emit special
1181 global symbols not handled in the hash table. */
1182 bfd_boolean (*elf_backend_output_arch_syms)
1183 (bfd *, struct bfd_link_info *, void *,
1184 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym *, asection *,
1185 struct elf_link_hash_entry *));
1187 /* Filter what symbols of the output file to include in the import
1188 library if one is created. */
1189 unsigned int (*elf_backend_filter_implib_symbols)
1190 (bfd *, struct bfd_link_info *, asymbol **, long);
1192 /* Copy any information related to dynamic linking from a pre-existing
1193 symbol to a newly created symbol. Also called to copy flags and
1194 other back-end info to a weakdef, in which case the symbol is not
1195 newly created and plt/got refcounts and dynamic indices should not
1197 void (*elf_backend_copy_indirect_symbol)
1198 (struct bfd_link_info *, struct elf_link_hash_entry *,
1199 struct elf_link_hash_entry *);
1201 /* Modify any information related to dynamic linking such that the
1202 symbol is not exported. */
1203 void (*elf_backend_hide_symbol)
1204 (struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean);
1206 /* A function to do additional symbol fixup, called by
1207 _bfd_elf_fix_symbol_flags. */
1208 bfd_boolean (*elf_backend_fixup_symbol)
1209 (struct bfd_link_info *, struct elf_link_hash_entry *);
1211 /* Merge the backend specific symbol attribute. */
1212 void (*elf_backend_merge_symbol_attribute)
1213 (struct elf_link_hash_entry *, const Elf_Internal_Sym *, bfd_boolean,
1216 /* This function, if defined, will return a string containing the
1217 name of a target-specific dynamic tag. */
1218 char *(*elf_backend_get_target_dtag)
1221 /* Decide whether an undefined symbol is special and can be ignored.
1222 This is the case for OPTIONAL symbols on IRIX. */
1223 bfd_boolean (*elf_backend_ignore_undef_symbol)
1224 (struct elf_link_hash_entry *);
1226 /* Emit relocations. Overrides default routine for emitting relocs,
1227 except during a relocatable link, or if all relocs are being emitted. */
1228 bfd_boolean (*elf_backend_emit_relocs)
1229 (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *,
1230 struct elf_link_hash_entry **);
1232 /* Update relocations. It is allowed to change the number and the order.
1233 In such a case hashes should be invalidated. */
1234 void (*elf_backend_update_relocs)
1235 (asection *, struct bfd_elf_section_reloc_data *);
1237 /* Count relocations. Not called for relocatable links
1238 or if all relocs are being preserved in the output. */
1239 unsigned int (*elf_backend_count_relocs)
1240 (struct bfd_link_info *, asection *);
1242 /* Count additionals relocations. Called for relocatable links if
1243 additional relocations needs to be created. */
1244 unsigned int (*elf_backend_count_additional_relocs)
1247 /* Say whether to sort relocs output by ld -r and ld --emit-relocs,
1248 by r_offset. If NULL, default to true. */
1249 bfd_boolean (*sort_relocs_p)
1252 /* This function, if defined, is called when an NT_PRSTATUS note is found
1254 bfd_boolean (*elf_backend_grok_prstatus)
1255 (bfd *, Elf_Internal_Note *);
1257 /* This function, if defined, is called when an NT_PSINFO or NT_PRPSINFO
1258 note is found in a core file. */
1259 bfd_boolean (*elf_backend_grok_psinfo)
1260 (bfd *, Elf_Internal_Note *);
1262 /* This function, if defined, is called to write a note to a corefile. */
1263 char *(*elf_backend_write_core_note)
1264 (bfd *abfd, char *buf, int *bufsiz, int note_type, ...);
1266 /* This function, if defined, is called to convert target-specific
1267 section flag names into hex values. */
1268 flagword (*elf_backend_lookup_section_flags_hook)
1271 /* This function returns class of a reloc type. */
1272 enum elf_reloc_type_class (*elf_backend_reloc_type_class)
1273 (const struct bfd_link_info *, const asection *, const Elf_Internal_Rela *);
1275 /* This function, if defined, removes information about discarded functions
1276 from other sections which mention them. */
1277 bfd_boolean (*elf_backend_discard_info)
1278 (bfd *, struct elf_reloc_cookie *, struct bfd_link_info *);
1280 /* This function, if defined, signals that the function above has removed
1281 the discarded relocations for this section. */
1282 bfd_boolean (*elf_backend_ignore_discarded_relocs)
1285 /* What to do when ld finds relocations against symbols defined in
1286 discarded sections. */
1287 unsigned int (*action_discarded)
1290 /* This function returns the width of FDE pointers in bytes, or 0 if
1291 that can't be determined for some reason. The default definition
1292 goes by the bfd's EI_CLASS. */
1293 unsigned int (*elf_backend_eh_frame_address_size)
1294 (bfd *, asection *);
1296 /* These functions tell elf-eh-frame whether to attempt to turn
1297 absolute or lsda encodings into pc-relative ones. The default
1298 definition enables these transformations. */
1299 bfd_boolean (*elf_backend_can_make_relative_eh_frame)
1300 (bfd *, struct bfd_link_info *, asection *);
1301 bfd_boolean (*elf_backend_can_make_lsda_relative_eh_frame)
1302 (bfd *, struct bfd_link_info *, asection *);
1304 /* This function returns an encoding after computing the encoded
1305 value (and storing it in ENCODED) for the given OFFSET into OSEC,
1306 to be stored in at LOC_OFFSET into the LOC_SEC input section.
1307 The default definition chooses a 32-bit PC-relative encoding. */
1308 bfd_byte (*elf_backend_encode_eh_address)
1309 (bfd *abfd, struct bfd_link_info *info,
1310 asection *osec, bfd_vma offset,
1311 asection *loc_sec, bfd_vma loc_offset,
1314 /* This function, if defined, may write out the given section.
1315 Returns TRUE if it did so and FALSE if the caller should. */
1316 bfd_boolean (*elf_backend_write_section)
1317 (bfd *, struct bfd_link_info *, asection *, bfd_byte *);
1319 /* The level of IRIX compatibility we're striving for.
1320 MIPS ELF specific function. */
1321 irix_compat_t (*elf_backend_mips_irix_compat)
1324 reloc_howto_type *(*elf_backend_mips_rtype_to_howto)
1325 (unsigned int, bfd_boolean);
1327 /* The swapping table to use when dealing with ECOFF information.
1328 Used for the MIPS ELF .mdebug section. */
1329 const struct ecoff_debug_swap *elf_backend_ecoff_debug_swap;
1331 /* This function implements `bfd_elf_bfd_from_remote_memory';
1332 see elf.c, elfcode.h. */
1333 bfd *(*elf_backend_bfd_from_remote_memory)
1334 (bfd *templ, bfd_vma ehdr_vma, bfd_size_type size, bfd_vma *loadbasep,
1335 int (*target_read_memory) (bfd_vma vma, bfd_byte *myaddr,
1336 bfd_size_type len));
1338 /* This function is used by `_bfd_elf_get_synthetic_symtab';
1340 bfd_vma (*plt_sym_val) (bfd_vma, const asection *, const arelent *);
1342 /* Is symbol defined in common section? */
1343 bfd_boolean (*common_definition) (Elf_Internal_Sym *);
1345 /* Return a common section index for section. */
1346 unsigned int (*common_section_index) (asection *);
1348 /* Return a common section for section. */
1349 asection *(*common_section) (asection *);
1351 /* Return TRUE if we can merge 2 definitions. */
1352 bfd_boolean (*merge_symbol) (struct elf_link_hash_entry *,
1353 const Elf_Internal_Sym *, asection **,
1354 bfd_boolean, bfd_boolean,
1355 bfd *, const asection *);
1357 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
1358 bfd_boolean (*elf_hash_symbol) (struct elf_link_hash_entry *);
1360 /* Return TRUE if type is a function symbol type. */
1361 bfd_boolean (*is_function_type) (unsigned int type);
1363 /* If the ELF symbol SYM might be a function in SEC, return the
1364 function size and set *CODE_OFF to the function's entry point,
1365 otherwise return zero. */
1366 bfd_size_type (*maybe_function_sym) (const asymbol *sym, asection *sec,
1369 /* Given NAME, the name of a relocation section stripped of its
1370 .rel/.rela prefix, return the section in ABFD to which the
1371 relocations apply. */
1372 asection *(*get_reloc_section) (bfd *abfd, const char *name);
1374 /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
1375 has a type >= SHT_LOOS. Returns TRUE if the fields were initialised,
1376 FALSE otherwise. Can be called multiple times for a given section,
1377 until it returns TRUE. Most of the times it is called ISECTION will be
1378 set to an input section that might be associated with the output section.
1379 The last time that it is called, ISECTION will be set to NULL. */
1380 bfd_boolean (*elf_backend_copy_special_section_fields)
1381 (const bfd *ibfd, bfd *obfd, const Elf_Internal_Shdr *isection,
1382 Elf_Internal_Shdr *osection);
1384 /* Used to handle bad SHF_LINK_ORDER input. */
1385 void (*link_order_error_handler) (const char *, ...);
1387 /* Name of the PLT relocation section. */
1388 const char *relplt_name;
1390 /* Alternate EM_xxxx machine codes for this backend. */
1391 int elf_machine_alt1;
1392 int elf_machine_alt2;
1394 const struct elf_size_info *s;
1396 /* An array of target specific special sections. */
1397 const struct bfd_elf_special_section *special_sections;
1399 /* The size in bytes of the header for the GOT. This includes the
1400 so-called reserved entries on some systems. */
1401 bfd_vma got_header_size;
1403 /* The size of the GOT entry for the symbol pointed to by H if non-NULL,
1404 otherwise by the local symbol with index SYMNDX in IBFD. */
1405 bfd_vma (*got_elt_size) (bfd *, struct bfd_link_info *,
1406 struct elf_link_hash_entry *h,
1407 bfd *ibfd, unsigned long symndx);
1409 /* The vendor name to use for a processor-standard attributes section. */
1410 const char *obj_attrs_vendor;
1412 /* The section name to use for a processor-standard attributes section. */
1413 const char *obj_attrs_section;
1415 /* Return 1, 2 or 3 to indicate what type of arguments a
1416 processor-specific tag takes. */
1417 int (*obj_attrs_arg_type) (int);
1419 /* The section type to use for an attributes section. */
1420 unsigned int obj_attrs_section_type;
1422 /* This function determines the order in which any attributes are
1423 written. It must be defined for input in the range
1424 LEAST_KNOWN_OBJ_ATTRIBUTE..NUM_KNOWN_OBJ_ATTRIBUTES-1 (this range
1425 is used in order to make unity easy). The returned value is the
1426 actual tag number to place in the input position. */
1427 int (*obj_attrs_order) (int);
1429 /* Handle merging unknown attributes; either warn and return TRUE,
1430 or give an error and return FALSE. */
1431 bfd_boolean (*obj_attrs_handle_unknown) (bfd *, int);
1433 /* Parse GNU properties. Return the property kind. If the property
1434 is corrupt, issue an error message and return property_corrupt. */
1435 enum elf_property_kind (*parse_gnu_properties) (bfd *, unsigned int,
1439 /* Merge GNU properties. Return TRUE if property is updated. */
1440 bfd_boolean (*merge_gnu_properties) (bfd *, elf_property *,
1443 /* Set up GNU properties. */
1444 void (*setup_gnu_properties) (struct bfd_link_info *);
1446 /* Encoding used for compact EH tables. */
1447 int (*compact_eh_encoding) (struct bfd_link_info *);
1449 /* Opcode representing no unwind. */
1450 int (*cant_unwind_opcode) (struct bfd_link_info *);
1452 /* This is non-zero if static TLS segments require a special alignment. */
1453 unsigned static_tls_alignment;
1455 /* Alignment for the PT_GNU_STACK segment. */
1456 unsigned stack_align;
1458 /* Flag bits to assign to a section of type SHT_STRTAB. */
1459 unsigned long elf_strtab_flags;
1461 /* This is TRUE if the linker should act like collect and gather
1462 global constructors and destructors by name. This is TRUE for
1463 MIPS ELF because the Irix 5 tools can not handle the .init
1465 unsigned collect : 1;
1467 /* This is TRUE if the linker should ignore changes to the type of a
1468 symbol. This is TRUE for MIPS ELF because some Irix 5 objects
1469 record undefined functions as STT_OBJECT although the definitions
1471 unsigned type_change_ok : 1;
1473 /* Whether the backend may use REL relocations. (Some backends use
1474 both REL and RELA relocations, and this flag is set for those
1476 unsigned may_use_rel_p : 1;
1478 /* Whether the backend may use RELA relocations. (Some backends use
1479 both REL and RELA relocations, and this flag is set for those
1481 unsigned may_use_rela_p : 1;
1483 /* Whether the default relocation type is RELA. If a backend with
1484 this flag set wants REL relocations for a particular section,
1485 it must note that explicitly. Similarly, if this flag is clear,
1486 and the backend wants RELA relocations for a particular
1488 unsigned default_use_rela_p : 1;
1490 /* True if PLT and copy relocations should be RELA by default. */
1491 unsigned rela_plts_and_copies_p : 1;
1493 /* Set if RELA relocations for a relocatable link can be handled by
1494 generic code. Backends that set this flag need do nothing in the
1495 backend relocate_section routine for relocatable linking. */
1496 unsigned rela_normal : 1;
1498 /* Set if DT_REL/DT_RELA/DT_RELSZ/DT_RELASZ should not include PLT
1500 unsigned dtrel_excludes_plt : 1;
1502 /* TRUE if addresses "naturally" sign extend. This is used when
1503 swapping in from Elf32 when BFD64. */
1504 unsigned sign_extend_vma : 1;
1506 unsigned want_got_plt : 1;
1507 unsigned plt_readonly : 1;
1508 unsigned want_plt_sym : 1;
1509 unsigned plt_not_loaded : 1;
1510 unsigned plt_alignment : 4;
1511 unsigned can_gc_sections : 1;
1512 unsigned can_refcount : 1;
1513 unsigned want_got_sym : 1;
1514 unsigned want_dynbss : 1;
1515 unsigned want_dynrelro : 1;
1517 /* Targets which do not support physical addressing often require
1518 that the p_paddr field in the section header to be set to zero.
1519 This field indicates whether this behavior is required. */
1520 unsigned want_p_paddr_set_to_zero : 1;
1522 /* Target has broken hardware and/or kernel that requires pages not
1523 to be mapped twice with different permissions. */
1524 unsigned no_page_alias : 1;
1526 /* True if an object file lacking a .note.GNU-stack section
1527 should be assumed to be requesting exec stack. At least one
1528 other file in the link needs to have a .note.GNU-stack section
1529 for a PT_GNU_STACK segment to be created. */
1530 unsigned default_execstack : 1;
1532 /* True if elf_section_data(sec)->this_hdr.contents is sec->rawsize
1533 in length rather than sec->size in length, if sec->rawsize is
1534 non-zero and smaller than sec->size. */
1535 unsigned caches_rawsize : 1;
1537 /* Address of protected data defined in the shared library may be
1538 external, i.e., due to copy relocation. */
1539 unsigned extern_protected_data : 1;
1541 /* True if `_bfd_elf_link_renumber_dynsyms' must be called even for
1543 unsigned always_renumber_dynsyms : 1;
1546 /* Information about reloc sections associated with a bfd_elf_section_data
1548 struct bfd_elf_section_reloc_data
1550 /* The ELF header for the reloc section associated with this
1552 Elf_Internal_Shdr *hdr;
1553 /* The number of relocations currently assigned to HDR. */
1555 /* The ELF section number of the reloc section. Only used for an
1558 /* Used by the backend linker to store the symbol hash table entries
1559 associated with relocs against global symbols. */
1560 struct elf_link_hash_entry **hashes;
1563 /* Information stored for each BFD section in an ELF file. This
1564 structure is allocated by elf_new_section_hook. */
1566 struct bfd_elf_section_data
1568 /* The ELF header for this section. */
1569 Elf_Internal_Shdr this_hdr;
1571 /* INPUT_SECTION_FLAGS if specified in the linker script. */
1572 struct flag_info *section_flag_info;
1574 /* Information about the REL and RELA reloc sections associated
1575 with this section, if any. */
1576 struct bfd_elf_section_reloc_data rel, rela;
1578 /* The ELF section number of this section. */
1581 /* Used by the backend linker when generating a shared library to
1582 record the dynamic symbol index for a section symbol
1583 corresponding to this section. A value of 0 means that there is
1584 no dynamic symbol for this section. */
1587 /* A pointer to the linked-to section for SHF_LINK_ORDER. */
1588 asection *linked_to;
1590 /* A pointer to the swapped relocs. If the section uses REL relocs,
1591 rather than RELA, all the r_addend fields will be zero. This
1592 pointer may be NULL. It is used by the backend linker. */
1593 Elf_Internal_Rela *relocs;
1595 /* A pointer to a linked list tracking dynamic relocs copied for
1599 /* A pointer to the bfd section used for dynamic relocs. */
1603 /* Group name, if this section is a member of a group. */
1606 /* Group signature sym, if this is the SHT_GROUP section. */
1607 struct bfd_symbol *id;
1610 /* For a member of a group, points to the SHT_GROUP section.
1611 NULL for the SHT_GROUP section itself and non-group sections. */
1612 asection *sec_group;
1614 /* A linked list of member sections in the group. Circular when used by
1615 the linker. For the SHT_GROUP section, points at first member. */
1616 asection *next_in_group;
1618 /* The FDEs associated with this section. The u.fde.next_in_section
1619 field acts as a chain pointer. */
1620 struct eh_cie_fde *fde_list;
1622 /* Link from a text section to its .eh_frame_entry section. */
1623 asection *eh_frame_entry;
1625 /* A pointer used for various section optimizations. */
1629 #define elf_section_data(sec) ((struct bfd_elf_section_data*)(sec)->used_by_bfd)
1630 #define elf_linked_to_section(sec) (elf_section_data(sec)->linked_to)
1631 #define elf_section_type(sec) (elf_section_data(sec)->this_hdr.sh_type)
1632 #define elf_section_flags(sec) (elf_section_data(sec)->this_hdr.sh_flags)
1633 #define elf_group_name(sec) (elf_section_data(sec)->group.name)
1634 #define elf_group_id(sec) (elf_section_data(sec)->group.id)
1635 #define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group)
1636 #define elf_fde_list(sec) (elf_section_data(sec)->fde_list)
1637 #define elf_sec_group(sec) (elf_section_data(sec)->sec_group)
1638 #define elf_section_eh_frame_entry(sec) (elf_section_data(sec)->eh_frame_entry)
1640 #define xvec_get_elf_backend_data(xvec) \
1641 ((const struct elf_backend_data *) (xvec)->backend_data)
1643 #define get_elf_backend_data(abfd) \
1644 xvec_get_elf_backend_data ((abfd)->xvec)
1646 /* The least object attributes (within an attributes subsection) known
1647 for any target. Some code assumes that the value 0 is not used and
1648 the field for that attribute can instead be used as a marker to
1649 indicate that attributes have been initialized. */
1650 #define LEAST_KNOWN_OBJ_ATTRIBUTE 2
1652 /* The maximum number of known object attributes for any target. */
1653 #define NUM_KNOWN_OBJ_ATTRIBUTES 71
1655 /* The value of an object attribute. The type indicates whether the attribute
1656 holds and integer, a string, or both. It can also indicate that there can
1657 be no default (i.e. all values must be written to file, even zero). */
1659 typedef struct obj_attribute
1661 #define ATTR_TYPE_FLAG_INT_VAL (1 << 0)
1662 #define ATTR_TYPE_FLAG_STR_VAL (1 << 1)
1663 #define ATTR_TYPE_FLAG_NO_DEFAULT (1 << 2)
1665 #define ATTR_TYPE_HAS_INT_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_INT_VAL)
1666 #define ATTR_TYPE_HAS_STR_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_STR_VAL)
1667 #define ATTR_TYPE_HAS_NO_DEFAULT(TYPE) ((TYPE) & ATTR_TYPE_FLAG_NO_DEFAULT)
1674 typedef struct obj_attribute_list
1676 struct obj_attribute_list *next;
1679 } obj_attribute_list;
1681 /* Object attributes may either be defined by the processor ABI, index
1682 OBJ_ATTR_PROC in the *_obj_attributes arrays, or be GNU-specific
1683 (and possibly also processor-specific), index OBJ_ATTR_GNU. */
1684 #define OBJ_ATTR_PROC 0
1685 #define OBJ_ATTR_GNU 1
1686 #define OBJ_ATTR_FIRST OBJ_ATTR_PROC
1687 #define OBJ_ATTR_LAST OBJ_ATTR_GNU
1689 /* The following object attribute tags are taken as generic, for all
1690 targets and for "gnu" where there is no target standard. */
1697 Tag_compatibility = 32
1700 /* The following struct stores information about every SystemTap section
1701 found in the object file. */
1704 struct sdt_note *next;
1709 /* tdata information grabbed from an elf core file. */
1710 struct core_elf_obj_tdata
1719 /* Extra tdata information held for output ELF BFDs. */
1720 struct output_elf_obj_tdata
1722 struct elf_segment_map *seg_map;
1723 struct elf_strtab_hash *strtab_ptr;
1725 /* STT_SECTION symbols for each section */
1726 asymbol **section_syms;
1728 /* Used to determine if PT_GNU_EH_FRAME segment header should be
1730 asection *eh_frame_hdr;
1732 /* NT_GNU_BUILD_ID note type info. */
1735 bfd_boolean (*after_write_object_contents) (bfd *);
1740 /* Records the result of `get_program_header_size'. */
1741 bfd_size_type program_header_size;
1743 /* Used when laying out sections. */
1744 file_ptr next_file_pos;
1746 int num_section_syms;
1747 unsigned int shstrtab_section, strtab_section;
1749 /* Segment flags for the PT_GNU_STACK segment. */
1750 unsigned int stack_flags;
1752 /* This is set to TRUE if the object was created by the backend
1756 /* Used to determine if the e_flags field has been initialized */
1757 bfd_boolean flags_init;
1760 /* Indicate if the bfd contains symbols that have the STT_GNU_IFUNC
1761 symbol type or STB_GNU_UNIQUE binding. Used to set the osabi
1762 field in the ELF header structure. */
1763 enum elf_gnu_symbols
1765 elf_gnu_symbol_none = 0,
1766 elf_gnu_symbol_any = 1 << 0,
1767 elf_gnu_symbol_ifunc = (elf_gnu_symbol_any | 1 << 1),
1768 elf_gnu_symbol_unique = (elf_gnu_symbol_any | 1 << 2),
1769 elf_gnu_symbol_all = (elf_gnu_symbol_ifunc | elf_gnu_symbol_unique)
1772 typedef struct elf_section_list
1774 Elf_Internal_Shdr hdr;
1776 struct elf_section_list * next;
1779 /* Some private data is stashed away for future use using the tdata pointer
1780 in the bfd structure. */
1782 struct elf_obj_tdata
1784 Elf_Internal_Ehdr elf_header[1]; /* Actual data, but ref like ptr */
1785 Elf_Internal_Shdr **elf_sect_ptr;
1786 Elf_Internal_Phdr *phdr;
1787 Elf_Internal_Shdr symtab_hdr;
1788 Elf_Internal_Shdr shstrtab_hdr;
1789 Elf_Internal_Shdr strtab_hdr;
1790 Elf_Internal_Shdr dynsymtab_hdr;
1791 Elf_Internal_Shdr dynstrtab_hdr;
1792 Elf_Internal_Shdr dynversym_hdr;
1793 Elf_Internal_Shdr dynverref_hdr;
1794 Elf_Internal_Shdr dynverdef_hdr;
1795 elf_section_list * symtab_shndx_list;
1796 bfd_vma gp; /* The gp value */
1797 unsigned int gp_size; /* The gp size */
1798 unsigned int num_elf_sections; /* elf_sect_ptr size */
1800 /* A mapping from external symbols to entries in the linker hash
1801 table, used when linking. This is indexed by the symbol index
1802 minus the sh_info field of the symbol table header. */
1803 struct elf_link_hash_entry **sym_hashes;
1805 /* Track usage and final offsets of GOT entries for local symbols.
1806 This array is indexed by symbol index. Elements are used
1807 identically to "got" in struct elf_link_hash_entry. */
1810 bfd_signed_vma *refcounts;
1812 struct got_entry **ents;
1815 /* The linker ELF emulation code needs to let the backend ELF linker
1816 know what filename should be used for a dynamic object if the
1817 dynamic object is found using a search. The emulation code then
1818 sometimes needs to know what name was actually used. Until the
1819 file has been added to the linker symbol table, this field holds
1820 the name the linker wants. After it has been added, it holds the
1821 name actually used, which will be the DT_SONAME entry if there is
1823 const char *dt_name;
1825 /* The linker emulation needs to know what audit libs
1826 are used by a dynamic object. */
1827 const char *dt_audit;
1829 /* Used by find_nearest_line entry point. */
1832 /* A place to stash dwarf1 info for this bfd. */
1833 struct dwarf1_debug *dwarf1_find_line_info;
1835 /* A place to stash dwarf2 info for this bfd. */
1836 void *dwarf2_find_line_info;
1838 /* Stash away info for yet another find line/function variant. */
1839 void *elf_find_function_cache;
1841 /* Number of symbol version definitions we are about to emit. */
1842 unsigned int cverdefs;
1844 /* Number of symbol version references we are about to emit. */
1845 unsigned int cverrefs;
1847 /* Symbol version definitions in external objects. */
1848 Elf_Internal_Verdef *verdef;
1850 /* Symbol version references to external objects. */
1851 Elf_Internal_Verneed *verref;
1853 /* A pointer to the .eh_frame section. */
1854 asection *eh_frame_section;
1856 /* Symbol buffer. */
1859 /* List of GNU properties. Will be updated by setup_gnu_properties
1860 after all input GNU properties are merged for output. */
1861 elf_property_list *properties;
1863 obj_attribute known_obj_attributes[2][NUM_KNOWN_OBJ_ATTRIBUTES];
1864 obj_attribute_list *other_obj_attributes[2];
1866 /* Linked-list containing information about every Systemtap section
1867 found in the object file. Each section corresponds to one entry
1869 struct sdt_note *sdt_note_head;
1871 Elf_Internal_Shdr **group_sect_ptr;
1874 unsigned int symtab_section, dynsymtab_section;
1875 unsigned int dynversym_section, dynverdef_section, dynverref_section;
1877 /* An identifier used to distinguish different target
1878 specific extensions to this structure. */
1879 enum elf_target_id object_id;
1881 /* Whether a dyanmic object was specified normally on the linker
1882 command line, or was specified when --as-needed was in effect,
1883 or was found via a DT_NEEDED entry. */
1884 enum dynamic_lib_link_class dyn_lib_class;
1886 /* Irix 5 often screws up the symbol table, sorting local symbols
1887 after global symbols. This flag is set if the symbol table in
1888 this BFD appears to be screwed up. If it is, we ignore the
1889 sh_info field in the symbol table header, and always read all the
1891 bfd_boolean bad_symtab;
1893 enum elf_gnu_symbols has_gnu_symbols;
1895 /* Information grabbed from an elf core file. */
1896 struct core_elf_obj_tdata *core;
1898 /* More information held for output ELF BFDs. */
1899 struct output_elf_obj_tdata *o;
1902 #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
1904 #define elf_object_id(bfd) (elf_tdata(bfd) -> object_id)
1905 #define elf_program_header_size(bfd) (elf_tdata(bfd) -> o->program_header_size)
1906 #define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header)
1907 #define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr)
1908 #define elf_numsections(bfd) (elf_tdata(bfd) -> num_elf_sections)
1909 #define elf_seg_map(bfd) (elf_tdata(bfd) -> o->seg_map)
1910 #define elf_next_file_pos(bfd) (elf_tdata(bfd) -> o->next_file_pos)
1911 #define elf_eh_frame_hdr(bfd) (elf_tdata(bfd) -> o->eh_frame_hdr)
1912 #define elf_linker(bfd) (elf_tdata(bfd) -> o->linker)
1913 #define elf_stack_flags(bfd) (elf_tdata(bfd) -> o->stack_flags)
1914 #define elf_shstrtab(bfd) (elf_tdata(bfd) -> o->strtab_ptr)
1915 #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section)
1916 #define elf_symtab_shndx_list(bfd) (elf_tdata(bfd) -> symtab_shndx_list)
1917 #define elf_strtab_sec(bfd) (elf_tdata(bfd) -> o->strtab_section)
1918 #define elf_shstrtab_sec(bfd) (elf_tdata(bfd) -> o->shstrtab_section)
1919 #define elf_symtab_hdr(bfd) (elf_tdata(bfd) -> symtab_hdr)
1920 #define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section)
1921 #define elf_dynversym(bfd) (elf_tdata(bfd) -> dynversym_section)
1922 #define elf_dynverdef(bfd) (elf_tdata(bfd) -> dynverdef_section)
1923 #define elf_dynverref(bfd) (elf_tdata(bfd) -> dynverref_section)
1924 #define elf_eh_frame_section(bfd) \
1925 (elf_tdata(bfd) -> eh_frame_section)
1926 #define elf_section_syms(bfd) (elf_tdata(bfd) -> o->section_syms)
1927 #define elf_num_section_syms(bfd) (elf_tdata(bfd) -> o->num_section_syms)
1928 #define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
1929 #define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
1930 #define elf_gp(bfd) (elf_tdata(bfd) -> gp)
1931 #define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size)
1932 #define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes)
1933 #define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts)
1934 #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets)
1935 #define elf_local_got_ents(bfd) (elf_tdata(bfd) -> local_got.ents)
1936 #define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name)
1937 #define elf_dt_audit(bfd) (elf_tdata(bfd) -> dt_audit)
1938 #define elf_dyn_lib_class(bfd) (elf_tdata(bfd) -> dyn_lib_class)
1939 #define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab)
1940 #define elf_flags_init(bfd) (elf_tdata(bfd) -> o->flags_init)
1941 #define elf_known_obj_attributes(bfd) (elf_tdata (bfd) -> known_obj_attributes)
1942 #define elf_other_obj_attributes(bfd) (elf_tdata (bfd) -> other_obj_attributes)
1943 #define elf_known_obj_attributes_proc(bfd) \
1944 (elf_known_obj_attributes (bfd) [OBJ_ATTR_PROC])
1945 #define elf_other_obj_attributes_proc(bfd) \
1946 (elf_other_obj_attributes (bfd) [OBJ_ATTR_PROC])
1947 #define elf_properties(bfd) (elf_tdata (bfd) -> properties)
1949 extern void _bfd_elf_swap_verdef_in
1950 (bfd *, const Elf_External_Verdef *, Elf_Internal_Verdef *);
1951 extern void _bfd_elf_swap_verdef_out
1952 (bfd *, const Elf_Internal_Verdef *, Elf_External_Verdef *);
1953 extern void _bfd_elf_swap_verdaux_in
1954 (bfd *, const Elf_External_Verdaux *, Elf_Internal_Verdaux *);
1955 extern void _bfd_elf_swap_verdaux_out
1956 (bfd *, const Elf_Internal_Verdaux *, Elf_External_Verdaux *);
1957 extern void _bfd_elf_swap_verneed_in
1958 (bfd *, const Elf_External_Verneed *, Elf_Internal_Verneed *);
1959 extern void _bfd_elf_swap_verneed_out
1960 (bfd *, const Elf_Internal_Verneed *, Elf_External_Verneed *);
1961 extern void _bfd_elf_swap_vernaux_in
1962 (bfd *, const Elf_External_Vernaux *, Elf_Internal_Vernaux *);
1963 extern void _bfd_elf_swap_vernaux_out
1964 (bfd *, const Elf_Internal_Vernaux *, Elf_External_Vernaux *);
1965 extern void _bfd_elf_swap_versym_in
1966 (bfd *, const Elf_External_Versym *, Elf_Internal_Versym *);
1967 extern void _bfd_elf_swap_versym_out
1968 (bfd *, const Elf_Internal_Versym *, Elf_External_Versym *);
1970 extern unsigned int _bfd_elf_section_from_bfd_section
1971 (bfd *, asection *);
1972 extern char *bfd_elf_string_from_elf_section
1973 (bfd *, unsigned, unsigned);
1974 extern Elf_Internal_Sym *bfd_elf_get_elf_syms
1975 (bfd *, Elf_Internal_Shdr *, size_t, size_t, Elf_Internal_Sym *, void *,
1976 Elf_External_Sym_Shndx *);
1977 extern const char *bfd_elf_sym_name
1978 (bfd *, Elf_Internal_Shdr *, Elf_Internal_Sym *, asection *);
1980 extern bfd_boolean _bfd_elf_copy_private_bfd_data
1982 extern bfd_boolean _bfd_elf_print_private_bfd_data
1984 const char * _bfd_elf_get_symbol_version_string
1985 (bfd *, asymbol *, bfd_boolean *);
1986 extern void bfd_elf_print_symbol
1987 (bfd *, void *, asymbol *, bfd_print_symbol_type);
1989 extern unsigned int _bfd_elf_eh_frame_address_size
1990 (bfd *, asection *);
1991 extern bfd_byte _bfd_elf_encode_eh_address
1992 (bfd *abfd, struct bfd_link_info *info, asection *osec, bfd_vma offset,
1993 asection *loc_sec, bfd_vma loc_offset, bfd_vma *encoded);
1994 extern bfd_boolean _bfd_elf_can_make_relative
1995 (bfd *input_bfd, struct bfd_link_info *info, asection *eh_frame_section);
1997 extern enum elf_reloc_type_class _bfd_elf_reloc_type_class
1998 (const struct bfd_link_info *, const asection *,
1999 const Elf_Internal_Rela *);
2000 extern bfd_vma _bfd_elf_rela_local_sym
2001 (bfd *, Elf_Internal_Sym *, asection **, Elf_Internal_Rela *);
2002 extern bfd_vma _bfd_elf_rel_local_sym
2003 (bfd *, Elf_Internal_Sym *, asection **, bfd_vma);
2004 extern bfd_vma _bfd_elf_section_offset
2005 (bfd *, struct bfd_link_info *, asection *, bfd_vma);
2007 extern unsigned long bfd_elf_hash
2009 extern unsigned long bfd_elf_gnu_hash
2012 extern bfd_reloc_status_type bfd_elf_generic_reloc
2013 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
2014 extern bfd_boolean bfd_elf_allocate_object
2015 (bfd *, size_t, enum elf_target_id);
2016 extern bfd_boolean bfd_elf_make_object
2018 extern bfd_boolean bfd_elf_mkcorefile
2020 extern bfd_boolean _bfd_elf_make_section_from_shdr
2021 (bfd *, Elf_Internal_Shdr *, const char *, int);
2022 extern bfd_boolean _bfd_elf_make_section_from_phdr
2023 (bfd *, Elf_Internal_Phdr *, int, const char *);
2024 extern struct bfd_hash_entry *_bfd_elf_link_hash_newfunc
2025 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
2026 extern struct bfd_link_hash_table *_bfd_elf_link_hash_table_create
2028 extern void _bfd_elf_link_hash_table_free
2030 extern void _bfd_elf_link_hash_copy_indirect
2031 (struct bfd_link_info *, struct elf_link_hash_entry *,
2032 struct elf_link_hash_entry *);
2033 extern void _bfd_elf_link_hash_hide_symbol
2034 (struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean);
2035 extern bfd_boolean _bfd_elf_link_hash_fixup_symbol
2036 (struct bfd_link_info *, struct elf_link_hash_entry *);
2037 extern bfd_boolean _bfd_elf_link_hash_table_init
2038 (struct elf_link_hash_table *, bfd *,
2039 struct bfd_hash_entry *(*)
2040 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *),
2041 unsigned int, enum elf_target_id);
2042 extern bfd_boolean _bfd_elf_slurp_version_tables
2043 (bfd *, bfd_boolean);
2044 extern bfd_boolean _bfd_elf_merge_sections
2045 (bfd *, struct bfd_link_info *);
2046 extern bfd_boolean _bfd_elf_match_sections_by_type
2047 (bfd *, const asection *, bfd *, const asection *);
2048 extern bfd_boolean bfd_elf_is_group_section
2049 (bfd *, const struct bfd_section *);
2050 extern bfd_boolean _bfd_elf_section_already_linked
2051 (bfd *, asection *, struct bfd_link_info *);
2052 extern void bfd_elf_set_group_contents
2053 (bfd *, asection *, void *);
2054 extern unsigned int _bfd_elf_filter_global_symbols
2055 (bfd *, struct bfd_link_info *, asymbol **, long);
2056 extern asection *_bfd_elf_check_kept_section
2057 (asection *, struct bfd_link_info *);
2058 #define _bfd_elf_link_just_syms _bfd_generic_link_just_syms
2059 extern void _bfd_elf_copy_link_hash_symbol_type
2060 (bfd *, struct bfd_link_hash_entry *, struct bfd_link_hash_entry *);
2061 extern bfd_boolean _bfd_elf_size_group_sections
2062 (struct bfd_link_info *);
2063 extern bfd_boolean _bfd_elf_fixup_group_sections
2064 (bfd *, asection *);
2065 extern bfd_boolean _bfd_elf_copy_private_header_data
2067 extern bfd_boolean _bfd_elf_copy_private_symbol_data
2068 (bfd *, asymbol *, bfd *, asymbol *);
2069 #define _bfd_generic_init_private_section_data \
2070 _bfd_elf_init_private_section_data
2071 extern bfd_boolean _bfd_elf_init_private_section_data
2072 (bfd *, asection *, bfd *, asection *, struct bfd_link_info *);
2073 extern bfd_boolean _bfd_elf_copy_private_section_data
2074 (bfd *, asection *, bfd *, asection *);
2075 extern bfd_boolean _bfd_elf_write_object_contents
2077 extern bfd_boolean _bfd_elf_write_corefile_contents
2079 extern bfd_boolean _bfd_elf_set_section_contents
2080 (bfd *, sec_ptr, const void *, file_ptr, bfd_size_type);
2081 extern long _bfd_elf_get_symtab_upper_bound
2083 extern long _bfd_elf_canonicalize_symtab
2084 (bfd *, asymbol **);
2085 extern long _bfd_elf_get_dynamic_symtab_upper_bound
2087 extern long _bfd_elf_canonicalize_dynamic_symtab
2088 (bfd *, asymbol **);
2089 extern long _bfd_elf_get_synthetic_symtab
2090 (bfd *, long, asymbol **, long, asymbol **, asymbol **);
2091 extern long _bfd_elf_get_reloc_upper_bound
2093 extern long _bfd_elf_canonicalize_reloc
2094 (bfd *, sec_ptr, arelent **, asymbol **);
2095 extern asection * _bfd_elf_get_dynamic_reloc_section
2096 (bfd *, asection *, bfd_boolean);
2097 extern asection * _bfd_elf_make_dynamic_reloc_section
2098 (asection *, bfd *, unsigned int, bfd *, bfd_boolean);
2099 extern long _bfd_elf_get_dynamic_reloc_upper_bound
2101 extern long _bfd_elf_canonicalize_dynamic_reloc
2102 (bfd *, arelent **, asymbol **);
2103 extern asymbol *_bfd_elf_make_empty_symbol
2105 extern void _bfd_elf_get_symbol_info
2106 (bfd *, asymbol *, symbol_info *);
2107 extern bfd_boolean _bfd_elf_is_local_label_name
2108 (bfd *, const char *);
2109 extern alent *_bfd_elf_get_lineno
2111 extern bfd_boolean _bfd_elf_set_arch_mach
2112 (bfd *, enum bfd_architecture, unsigned long);
2113 extern bfd_boolean _bfd_elf_find_nearest_line
2114 (bfd *, asymbol **, asection *, bfd_vma,
2115 const char **, const char **, unsigned int *, unsigned int *);
2116 extern bfd_boolean _bfd_elf_find_line
2117 (bfd *, asymbol **, asymbol *, const char **, unsigned int *);
2118 extern bfd_boolean _bfd_elf_find_inliner_info
2119 (bfd *, const char **, const char **, unsigned int *);
2120 extern asymbol *_bfd_elf_find_function
2121 (bfd *, asymbol **, asection *, bfd_vma, const char **, const char **);
2122 #define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols
2123 #define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
2124 extern int _bfd_elf_sizeof_headers
2125 (bfd *, struct bfd_link_info *);
2126 extern bfd_boolean _bfd_elf_new_section_hook
2127 (bfd *, asection *);
2128 extern const struct bfd_elf_special_section *_bfd_elf_get_special_section
2129 (const char *, const struct bfd_elf_special_section *, unsigned int);
2130 extern const struct bfd_elf_special_section *_bfd_elf_get_sec_type_attr
2131 (bfd *, asection *);
2133 /* If the target doesn't have reloc handling written yet: */
2134 extern void _bfd_elf_no_info_to_howto
2135 (bfd *, arelent *, Elf_Internal_Rela *);
2137 extern bfd_boolean bfd_section_from_shdr
2138 (bfd *, unsigned int shindex);
2139 extern bfd_boolean bfd_section_from_phdr
2140 (bfd *, Elf_Internal_Phdr *, int);
2142 extern int _bfd_elf_symbol_from_bfd_symbol
2143 (bfd *, asymbol **);
2145 extern Elf_Internal_Sym *bfd_sym_from_r_symndx
2146 (struct sym_cache *, bfd *, unsigned long);
2147 extern asection *bfd_section_from_elf_index
2148 (bfd *, unsigned int);
2150 extern struct elf_strtab_hash * _bfd_elf_strtab_init
2152 extern void _bfd_elf_strtab_free
2153 (struct elf_strtab_hash *);
2154 extern size_t _bfd_elf_strtab_add
2155 (struct elf_strtab_hash *, const char *, bfd_boolean);
2156 extern void _bfd_elf_strtab_addref
2157 (struct elf_strtab_hash *, size_t);
2158 extern void _bfd_elf_strtab_delref
2159 (struct elf_strtab_hash *, size_t);
2160 extern unsigned int _bfd_elf_strtab_refcount
2161 (struct elf_strtab_hash *, size_t);
2162 extern void _bfd_elf_strtab_clear_all_refs
2163 (struct elf_strtab_hash *);
2164 extern void *_bfd_elf_strtab_save
2165 (struct elf_strtab_hash *);
2166 extern void _bfd_elf_strtab_restore
2167 (struct elf_strtab_hash *, void *);
2168 extern bfd_size_type _bfd_elf_strtab_size
2169 (struct elf_strtab_hash *);
2170 extern bfd_size_type _bfd_elf_strtab_offset
2171 (struct elf_strtab_hash *, size_t);
2172 extern bfd_boolean _bfd_elf_strtab_emit
2173 (bfd *, struct elf_strtab_hash *);
2174 extern void _bfd_elf_strtab_finalize
2175 (struct elf_strtab_hash *);
2177 extern bfd_boolean bfd_elf_parse_eh_frame_entries
2178 (bfd *, struct bfd_link_info *);
2179 extern bfd_boolean _bfd_elf_parse_eh_frame_entry
2180 (struct bfd_link_info *, asection *, struct elf_reloc_cookie *);
2181 extern void _bfd_elf_parse_eh_frame
2182 (bfd *, struct bfd_link_info *, asection *, struct elf_reloc_cookie *);
2183 extern bfd_boolean _bfd_elf_end_eh_frame_parsing
2184 (struct bfd_link_info *info);
2186 extern bfd_boolean _bfd_elf_discard_section_eh_frame
2187 (bfd *, struct bfd_link_info *, asection *,
2188 bfd_boolean (*) (bfd_vma, void *), struct elf_reloc_cookie *);
2189 extern bfd_boolean _bfd_elf_adjust_eh_frame_global_symbol
2190 (struct elf_link_hash_entry *, void *);
2191 extern bfd_boolean _bfd_elf_discard_section_eh_frame_hdr
2192 (bfd *, struct bfd_link_info *);
2193 extern bfd_vma _bfd_elf_eh_frame_section_offset
2194 (bfd *, struct bfd_link_info *, asection *, bfd_vma);
2195 extern bfd_boolean _bfd_elf_write_section_eh_frame
2196 (bfd *, struct bfd_link_info *, asection *, bfd_byte *);
2197 bfd_boolean _bfd_elf_write_section_eh_frame_entry
2198 (bfd *, struct bfd_link_info *, asection *, bfd_byte *);
2199 extern bfd_boolean _bfd_elf_fixup_eh_frame_hdr (struct bfd_link_info *);
2200 extern bfd_boolean _bfd_elf_write_section_eh_frame_hdr
2201 (bfd *, struct bfd_link_info *);
2202 extern bfd_boolean _bfd_elf_eh_frame_present
2203 (struct bfd_link_info *);
2204 extern bfd_boolean _bfd_elf_eh_frame_entry_present
2205 (struct bfd_link_info *);
2206 extern bfd_boolean _bfd_elf_maybe_strip_eh_frame_hdr
2207 (struct bfd_link_info *);
2209 extern bfd_boolean _bfd_elf_hash_symbol (struct elf_link_hash_entry *);
2211 extern long _bfd_elf_link_lookup_local_dynindx
2212 (struct bfd_link_info *, bfd *, long);
2213 extern bfd_boolean _bfd_elf_compute_section_file_positions
2214 (bfd *, struct bfd_link_info *);
2215 extern file_ptr _bfd_elf_assign_file_position_for_section
2216 (Elf_Internal_Shdr *, file_ptr, bfd_boolean);
2218 extern bfd_boolean _bfd_elf_validate_reloc
2221 extern bfd_boolean _bfd_elf_link_create_dynamic_sections
2222 (bfd *, struct bfd_link_info *);
2223 extern bfd_boolean _bfd_elf_link_omit_section_dynsym
2224 (bfd *, struct bfd_link_info *, asection *);
2225 extern bfd_boolean _bfd_elf_create_dynamic_sections
2226 (bfd *, struct bfd_link_info *);
2227 extern bfd_boolean _bfd_elf_create_got_section
2228 (bfd *, struct bfd_link_info *);
2229 extern asection *_bfd_elf_section_for_symbol
2230 (struct elf_reloc_cookie *, unsigned long, bfd_boolean);
2231 extern struct elf_link_hash_entry *_bfd_elf_define_linkage_sym
2232 (bfd *, struct bfd_link_info *, asection *, const char *);
2233 extern void _bfd_elf_init_1_index_section
2234 (bfd *, struct bfd_link_info *);
2235 extern void _bfd_elf_init_2_index_sections
2236 (bfd *, struct bfd_link_info *);
2238 extern bfd_boolean _bfd_elfcore_make_pseudosection
2239 (bfd *, char *, size_t, ufile_ptr);
2240 extern char *_bfd_elfcore_strndup
2241 (bfd *, char *, size_t);
2243 extern Elf_Internal_Rela *_bfd_elf_link_read_relocs
2244 (bfd *, asection *, void *, Elf_Internal_Rela *, bfd_boolean);
2246 extern bfd_boolean _bfd_elf_link_output_relocs
2247 (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *,
2248 struct elf_link_hash_entry **);
2250 extern bfd_boolean _bfd_elf_adjust_dynamic_copy
2251 (struct bfd_link_info *, struct elf_link_hash_entry *, asection *);
2253 extern bfd_boolean _bfd_elf_dynamic_symbol_p
2254 (struct elf_link_hash_entry *, struct bfd_link_info *, bfd_boolean);
2256 extern bfd_boolean _bfd_elf_symbol_refs_local_p
2257 (struct elf_link_hash_entry *, struct bfd_link_info *, bfd_boolean);
2259 extern bfd_reloc_status_type bfd_elf_perform_complex_relocation
2260 (bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, bfd_vma);
2262 extern bfd_boolean _bfd_elf_setup_sections
2265 extern void _bfd_elf_post_process_headers (bfd * , struct bfd_link_info *);
2267 extern const bfd_target *bfd_elf32_object_p
2269 extern const bfd_target *bfd_elf32_core_file_p
2271 extern char *bfd_elf32_core_file_failing_command
2273 extern int bfd_elf32_core_file_failing_signal
2275 extern bfd_boolean bfd_elf32_core_file_matches_executable_p
2277 extern int bfd_elf32_core_file_pid
2280 extern bfd_boolean bfd_elf32_swap_symbol_in
2281 (bfd *, const void *, const void *, Elf_Internal_Sym *);
2282 extern void bfd_elf32_swap_symbol_out
2283 (bfd *, const Elf_Internal_Sym *, void *, void *);
2284 extern void bfd_elf32_swap_reloc_in
2285 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
2286 extern void bfd_elf32_swap_reloc_out
2287 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
2288 extern void bfd_elf32_swap_reloca_in
2289 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
2290 extern void bfd_elf32_swap_reloca_out
2291 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
2292 extern void bfd_elf32_swap_phdr_in
2293 (bfd *, const Elf32_External_Phdr *, Elf_Internal_Phdr *);
2294 extern void bfd_elf32_swap_phdr_out
2295 (bfd *, const Elf_Internal_Phdr *, Elf32_External_Phdr *);
2296 extern void bfd_elf32_swap_dyn_in
2297 (bfd *, const void *, Elf_Internal_Dyn *);
2298 extern void bfd_elf32_swap_dyn_out
2299 (bfd *, const Elf_Internal_Dyn *, void *);
2300 extern long bfd_elf32_slurp_symbol_table
2301 (bfd *, asymbol **, bfd_boolean);
2302 extern bfd_boolean bfd_elf32_write_shdrs_and_ehdr
2304 extern int bfd_elf32_write_out_phdrs
2305 (bfd *, const Elf_Internal_Phdr *, unsigned int);
2306 extern bfd_boolean bfd_elf32_checksum_contents
2307 (bfd * , void (*) (const void *, size_t, void *), void *);
2308 extern void bfd_elf32_write_relocs
2309 (bfd *, asection *, void *);
2310 extern bfd_boolean bfd_elf32_slurp_reloc_table
2311 (bfd *, asection *, asymbol **, bfd_boolean);
2313 extern const bfd_target *bfd_elf64_object_p
2315 extern const bfd_target *bfd_elf64_core_file_p
2317 extern char *bfd_elf64_core_file_failing_command
2319 extern int bfd_elf64_core_file_failing_signal
2321 extern bfd_boolean bfd_elf64_core_file_matches_executable_p
2323 extern int bfd_elf64_core_file_pid
2326 extern bfd_boolean bfd_elf64_swap_symbol_in
2327 (bfd *, const void *, const void *, Elf_Internal_Sym *);
2328 extern void bfd_elf64_swap_symbol_out
2329 (bfd *, const Elf_Internal_Sym *, void *, void *);
2330 extern void bfd_elf64_swap_reloc_in
2331 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
2332 extern void bfd_elf64_swap_reloc_out
2333 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
2334 extern void bfd_elf64_swap_reloca_in
2335 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
2336 extern void bfd_elf64_swap_reloca_out
2337 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
2338 extern void bfd_elf64_swap_phdr_in
2339 (bfd *, const Elf64_External_Phdr *, Elf_Internal_Phdr *);
2340 extern void bfd_elf64_swap_phdr_out
2341 (bfd *, const Elf_Internal_Phdr *, Elf64_External_Phdr *);
2342 extern void bfd_elf64_swap_dyn_in
2343 (bfd *, const void *, Elf_Internal_Dyn *);
2344 extern void bfd_elf64_swap_dyn_out
2345 (bfd *, const Elf_Internal_Dyn *, void *);
2346 extern long bfd_elf64_slurp_symbol_table
2347 (bfd *, asymbol **, bfd_boolean);
2348 extern bfd_boolean bfd_elf64_write_shdrs_and_ehdr
2350 extern int bfd_elf64_write_out_phdrs
2351 (bfd *, const Elf_Internal_Phdr *, unsigned int);
2352 extern bfd_boolean bfd_elf64_checksum_contents
2353 (bfd * , void (*) (const void *, size_t, void *), void *);
2354 extern void bfd_elf64_write_relocs
2355 (bfd *, asection *, void *);
2356 extern bfd_boolean bfd_elf64_slurp_reloc_table
2357 (bfd *, asection *, asymbol **, bfd_boolean);
2359 extern bfd_boolean _bfd_elf_default_relocs_compatible
2360 (const bfd_target *, const bfd_target *);
2362 extern bfd_boolean _bfd_elf_relocs_compatible
2363 (const bfd_target *, const bfd_target *);
2364 extern bfd_boolean _bfd_elf_notice_as_needed
2365 (bfd *, struct bfd_link_info *, enum notice_asneeded_action);
2367 extern struct elf_link_hash_entry *_bfd_elf_archive_symbol_lookup
2368 (bfd *, struct bfd_link_info *, const char *);
2369 extern bfd_boolean bfd_elf_link_add_symbols
2370 (bfd *, struct bfd_link_info *);
2371 extern bfd_boolean _bfd_elf_add_dynamic_entry
2372 (struct bfd_link_info *, bfd_vma, bfd_vma);
2373 extern bfd_boolean _bfd_elf_link_check_relocs
2374 (bfd *, struct bfd_link_info *);
2376 extern bfd_boolean bfd_elf_link_record_dynamic_symbol
2377 (struct bfd_link_info *, struct elf_link_hash_entry *);
2379 extern int bfd_elf_link_record_local_dynamic_symbol
2380 (struct bfd_link_info *, bfd *, long);
2382 extern bfd_boolean _bfd_elf_close_and_cleanup
2385 extern bfd_boolean _bfd_elf_common_definition
2386 (Elf_Internal_Sym *);
2388 extern unsigned int _bfd_elf_common_section_index
2391 extern asection *_bfd_elf_common_section
2394 extern bfd_vma _bfd_elf_default_got_elt_size
2395 (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, bfd *,
2398 extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn
2399 (bfd *, arelent *, struct bfd_symbol *, void *,
2400 asection *, bfd *, char **);
2402 extern bfd_boolean bfd_elf_final_link
2403 (bfd *, struct bfd_link_info *);
2405 extern void _bfd_elf_gc_keep
2406 (struct bfd_link_info *info);
2408 extern bfd_boolean bfd_elf_gc_mark_dynamic_ref_symbol
2409 (struct elf_link_hash_entry *h, void *inf);
2411 extern bfd_boolean bfd_elf_gc_sections
2412 (bfd *, struct bfd_link_info *);
2414 extern bfd_boolean bfd_elf_gc_record_vtinherit
2415 (bfd *, asection *, struct elf_link_hash_entry *, bfd_vma);
2417 extern bfd_boolean bfd_elf_gc_record_vtentry
2418 (bfd *, asection *, struct elf_link_hash_entry *, bfd_vma);
2420 extern asection *_bfd_elf_gc_mark_hook
2421 (asection *, struct bfd_link_info *, Elf_Internal_Rela *,
2422 struct elf_link_hash_entry *, Elf_Internal_Sym *);
2424 extern asection *_bfd_elf_gc_mark_rsec
2425 (struct bfd_link_info *, asection *, elf_gc_mark_hook_fn,
2426 struct elf_reloc_cookie *, bfd_boolean *);
2428 extern bfd_boolean _bfd_elf_gc_mark_reloc
2429 (struct bfd_link_info *, asection *, elf_gc_mark_hook_fn,
2430 struct elf_reloc_cookie *);
2432 extern bfd_boolean _bfd_elf_gc_mark_fdes
2433 (struct bfd_link_info *, asection *, asection *, elf_gc_mark_hook_fn,
2434 struct elf_reloc_cookie *);
2436 extern bfd_boolean _bfd_elf_gc_mark
2437 (struct bfd_link_info *, asection *, elf_gc_mark_hook_fn);
2439 extern bfd_boolean _bfd_elf_gc_mark_extra_sections
2440 (struct bfd_link_info *, elf_gc_mark_hook_fn);
2442 extern bfd_boolean bfd_elf_gc_common_finalize_got_offsets
2443 (bfd *, struct bfd_link_info *);
2445 extern bfd_boolean bfd_elf_gc_common_final_link
2446 (bfd *, struct bfd_link_info *);
2448 extern asection *_bfd_elf_is_start_stop
2449 (const struct bfd_link_info *, struct elf_link_hash_entry *);
2451 extern bfd_boolean bfd_elf_reloc_symbol_deleted_p
2454 extern struct elf_segment_map * _bfd_elf_make_dynamic_segment
2455 (bfd *, asection *);
2457 extern bfd_boolean _bfd_elf_map_sections_to_segments
2458 (bfd *, struct bfd_link_info *);
2460 extern bfd_boolean _bfd_elf_is_function_type (unsigned int);
2462 extern bfd_size_type _bfd_elf_maybe_function_sym (const asymbol *, asection *,
2465 extern asection *_bfd_elf_plt_get_reloc_section (bfd *, const char *);
2467 extern int bfd_elf_get_default_section_type (flagword);
2469 extern bfd_boolean bfd_elf_lookup_section_flags
2470 (struct bfd_link_info *, struct flag_info *, asection *);
2472 extern Elf_Internal_Phdr * _bfd_elf_find_segment_containing_section
2473 (bfd * abfd, asection * section);
2475 /* PowerPC @tls opcode transform/validate. */
2476 extern unsigned int _bfd_elf_ppc_at_tls_transform
2477 (unsigned int, unsigned int);
2478 /* PowerPC @tprel opcode transform/validate. */
2479 extern unsigned int _bfd_elf_ppc_at_tprel_transform
2480 (unsigned int, unsigned int);
2481 /* PowerPC elf_object_p tweak. */
2482 extern bfd_boolean _bfd_elf_ppc_set_arch (bfd *);
2483 /* PowerPC .gnu.attributes handling common to both 32-bit and 64-bit. */
2484 extern void _bfd_elf_ppc_merge_fp_attributes (bfd *, struct bfd_link_info *);
2486 /* Exported interface for writing elf corefile notes. */
2487 extern char *elfcore_write_note
2488 (bfd *, char *, int *, const char *, int, const void *, int);
2489 extern char *elfcore_write_prpsinfo
2490 (bfd *, char *, int *, const char *, const char *);
2491 extern char *elfcore_write_prstatus
2492 (bfd *, char *, int *, long, int, const void *);
2493 extern char * elfcore_write_pstatus
2494 (bfd *, char *, int *, long, int, const void *);
2495 extern char *elfcore_write_prfpreg
2496 (bfd *, char *, int *, const void *, int);
2497 extern char *elfcore_write_prxfpreg
2498 (bfd *, char *, int *, const void *, int);
2499 extern char *elfcore_write_xstatereg
2500 (bfd *, char *, int *, const void *, int);
2501 extern char *elfcore_write_ppc_vmx
2502 (bfd *, char *, int *, const void *, int);
2503 extern char *elfcore_write_ppc_vsx
2504 (bfd *, char *, int *, const void *, int);
2505 extern char *elfcore_write_s390_timer
2506 (bfd *, char *, int *, const void *, int);
2507 extern char *elfcore_write_s390_todcmp
2508 (bfd *, char *, int *, const void *, int);
2509 extern char *elfcore_write_s390_todpreg
2510 (bfd *, char *, int *, const void *, int);
2511 extern char *elfcore_write_s390_ctrs
2512 (bfd *, char *, int *, const void *, int);
2513 extern char *elfcore_write_s390_prefix
2514 (bfd *, char *, int *, const void *, int);
2515 extern char *elfcore_write_s390_last_break
2516 (bfd *, char *, int *, const void *, int);
2517 extern char *elfcore_write_s390_system_call
2518 (bfd *, char *, int *, const void *, int);
2519 extern char *elfcore_write_s390_tdb
2520 (bfd *, char *, int *, const void *, int);
2521 extern char *elfcore_write_s390_vxrs_low
2522 (bfd *, char *, int *, const void *, int);
2523 extern char *elfcore_write_s390_vxrs_high
2524 (bfd *, char *, int *, const void *, int);
2525 extern char *elfcore_write_arm_vfp
2526 (bfd *, char *, int *, const void *, int);
2527 extern char *elfcore_write_aarch_tls
2528 (bfd *, char *, int *, const void *, int);
2529 extern char *elfcore_write_aarch_hw_break
2530 (bfd *, char *, int *, const void *, int);
2531 extern char *elfcore_write_aarch_hw_watch
2532 (bfd *, char *, int *, const void *, int);
2533 extern char *elfcore_write_lwpstatus
2534 (bfd *, char *, int *, long, int, const void *);
2535 extern char *elfcore_write_register_note
2536 (bfd *, char *, int *, const char *, const void *, int);
2538 /* Internal structure which holds information to be included in the
2539 PRPSINFO section of Linux core files.
2541 This is an "internal" structure in the sense that it should be used
2542 to pass information to BFD (via the `elfcore_write_linux_prpsinfo'
2543 function), so things like endianess shouldn't be an issue. This
2544 structure will eventually be converted in one of the
2545 `elf_external_linux_*' structures and written out to an output bfd
2546 by one of the functions declared below. */
2548 struct elf_internal_linux_prpsinfo
2550 char pr_state; /* Numeric process state. */
2551 char pr_sname; /* Char for pr_state. */
2552 char pr_zomb; /* Zombie. */
2553 char pr_nice; /* Nice val. */
2554 unsigned long pr_flag; /* Flags. */
2555 unsigned int pr_uid;
2556 unsigned int pr_gid;
2557 int pr_pid, pr_ppid, pr_pgrp, pr_sid;
2558 char pr_fname[16 + 1]; /* Filename of executable. */
2559 char pr_psargs[80 + 1]; /* Initial part of arg list. */
2562 /* Linux/most 32-bit archs. */
2563 extern char *elfcore_write_linux_prpsinfo32
2564 (bfd *, char *, int *, const struct elf_internal_linux_prpsinfo *);
2566 /* Linux/most 64-bit archs. */
2567 extern char *elfcore_write_linux_prpsinfo64
2568 (bfd *, char *, int *, const struct elf_internal_linux_prpsinfo *);
2570 /* Linux/PPC32 uses different layout compared to most archs. */
2571 extern char *elfcore_write_ppc_linux_prpsinfo32
2572 (bfd *, char *, int *, const struct elf_internal_linux_prpsinfo *);
2574 extern bfd *_bfd_elf32_bfd_from_remote_memory
2575 (bfd *templ, bfd_vma ehdr_vma, bfd_size_type size, bfd_vma *loadbasep,
2576 int (*target_read_memory) (bfd_vma, bfd_byte *, bfd_size_type));
2577 extern bfd *_bfd_elf64_bfd_from_remote_memory
2578 (bfd *templ, bfd_vma ehdr_vma, bfd_size_type size, bfd_vma *loadbasep,
2579 int (*target_read_memory) (bfd_vma, bfd_byte *, bfd_size_type));
2581 extern bfd_vma bfd_elf_obj_attr_size (bfd *);
2582 extern void bfd_elf_set_obj_attr_contents (bfd *, bfd_byte *, bfd_vma);
2583 extern int bfd_elf_get_obj_attr_int (bfd *, int, unsigned int);
2584 extern void bfd_elf_add_obj_attr_int (bfd *, int, unsigned int, unsigned int);
2585 #define bfd_elf_add_proc_attr_int(BFD, TAG, VALUE) \
2586 bfd_elf_add_obj_attr_int ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2587 extern void bfd_elf_add_obj_attr_string (bfd *, int, unsigned int, const char *);
2588 #define bfd_elf_add_proc_attr_string(BFD, TAG, VALUE) \
2589 bfd_elf_add_obj_attr_string ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2590 extern void bfd_elf_add_obj_attr_int_string (bfd *, int, unsigned int,
2591 unsigned int, const char *);
2592 #define bfd_elf_add_proc_attr_int_string(BFD, TAG, INTVAL, STRVAL) \
2593 bfd_elf_add_obj_attr_int_string ((BFD), OBJ_ATTR_PROC, (TAG), \
2596 extern char *_bfd_elf_attr_strdup (bfd *, const char *);
2597 extern void _bfd_elf_copy_obj_attributes (bfd *, bfd *);
2598 extern int _bfd_elf_obj_attrs_arg_type (bfd *, int, unsigned int);
2599 extern void _bfd_elf_parse_attributes (bfd *, Elf_Internal_Shdr *);
2600 extern bfd_boolean _bfd_elf_merge_object_attributes
2601 (bfd *, struct bfd_link_info *);
2602 extern bfd_boolean _bfd_elf_merge_unknown_attribute_low (bfd *, bfd *, int);
2603 extern bfd_boolean _bfd_elf_merge_unknown_attribute_list (bfd *, bfd *);
2604 extern Elf_Internal_Shdr *_bfd_elf_single_rel_hdr (asection *sec);
2606 extern bfd_boolean _bfd_elf_parse_gnu_properties
2607 (bfd *, Elf_Internal_Note *);
2608 extern elf_property * _bfd_elf_get_property
2609 (bfd *, unsigned int, unsigned int);
2610 extern void _bfd_elf_link_setup_gnu_properties
2611 (struct bfd_link_info *);
2613 /* The linker may need to keep track of the number of relocs that it
2614 decides to copy as dynamic relocs in check_relocs for each symbol.
2615 This is so that it can later discard them if they are found to be
2616 unnecessary. We can store the information in a field extending the
2617 regular ELF linker hash table. */
2619 struct elf_dyn_relocs
2621 struct elf_dyn_relocs *next;
2623 /* The input section of the reloc. */
2626 /* Total number of relocs copied for the input section. */
2627 bfd_size_type count;
2629 /* Number of pc-relative relocs copied for the input section. */
2630 bfd_size_type pc_count;
2633 extern bfd_boolean _bfd_elf_create_ifunc_sections
2634 (bfd *, struct bfd_link_info *);
2635 extern bfd_boolean _bfd_elf_allocate_ifunc_dyn_relocs
2636 (struct bfd_link_info *, struct elf_link_hash_entry *,
2637 struct elf_dyn_relocs **, bfd_boolean *, unsigned int,
2638 unsigned int, unsigned int, bfd_boolean);
2639 extern long _bfd_elf_ifunc_get_synthetic_symtab
2640 (bfd *, long, asymbol **, long, asymbol **, asymbol **, asection *,
2641 bfd_vma *(*) (bfd *, asymbol **, asection *, asection *));
2643 extern void elf_append_rela (bfd *, asection *, Elf_Internal_Rela *);
2644 extern void elf_append_rel (bfd *, asection *, Elf_Internal_Rela *);
2646 extern bfd_vma elf64_r_info (bfd_vma, bfd_vma);
2647 extern bfd_vma elf64_r_sym (bfd_vma);
2648 extern bfd_vma elf32_r_info (bfd_vma, bfd_vma);
2649 extern bfd_vma elf32_r_sym (bfd_vma);
2651 /* Large common section. */
2652 extern asection _bfd_elf_large_com_section;
2654 /* Hash for local symbol with the first section id, ID, in the input
2655 file and the local symbol index, SYM. */
2656 #define ELF_LOCAL_SYMBOL_HASH(ID, SYM) \
2657 (((((ID) & 0xff) << 24) | (((ID) & 0xff00) << 8)) \
2658 ^ (SYM) ^ ((ID) >> 16))
2660 /* This is the condition under which finish_dynamic_symbol will be called.
2661 If our finish_dynamic_symbol isn't called, we'll need to do something
2662 about initializing any .plt and .got entries in relocate_section. */
2663 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
2665 && ((SHARED) || !(H)->forced_local) \
2666 && ((H)->dynindx != -1 || (H)->forced_local))
2668 /* This macro is to avoid lots of duplicated code in the body
2669 of xxx_relocate_section() in the various elfxx-xxxx.c files. */
2670 #define RELOC_FOR_GLOBAL_SYMBOL(info, input_bfd, input_section, rel, \
2671 r_symndx, symtab_hdr, sym_hashes, \
2672 h, sec, relocation, \
2673 unresolved_reloc, warned, ignored) \
2676 /* It seems this can happen with erroneous or unsupported \
2677 input (mixing a.out and elf in an archive, for example.) */ \
2678 if (sym_hashes == NULL) \
2681 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; \
2683 if (info->wrap_hash != NULL \
2684 && (input_section->flags & SEC_DEBUGGING) != 0) \
2685 h = ((struct elf_link_hash_entry *) \
2686 unwrap_hash_lookup (info, input_bfd, &h->root)); \
2688 while (h->root.type == bfd_link_hash_indirect \
2689 || h->root.type == bfd_link_hash_warning) \
2690 h = (struct elf_link_hash_entry *) h->root.u.i.link; \
2694 unresolved_reloc = FALSE; \
2696 if (h->root.type == bfd_link_hash_defined \
2697 || h->root.type == bfd_link_hash_defweak) \
2699 sec = h->root.u.def.section; \
2701 || sec->output_section == NULL) \
2702 /* Set a flag that will be cleared later if we find a \
2703 relocation value for this symbol. output_section \
2704 is typically NULL for symbols satisfied by a shared \
2706 unresolved_reloc = TRUE; \
2708 relocation = (h->root.u.def.value \
2709 + sec->output_section->vma \
2710 + sec->output_offset); \
2712 else if (h->root.type == bfd_link_hash_undefweak) \
2714 else if (info->unresolved_syms_in_objects == RM_IGNORE \
2715 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) \
2717 else if (!bfd_link_relocatable (info)) \
2720 err = (info->unresolved_syms_in_objects == RM_GENERATE_ERROR \
2721 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT); \
2722 (*info->callbacks->undefined_symbol) (info, \
2723 h->root.root.string, \
2726 rel->r_offset, err); \
2729 (void) unresolved_reloc; \
2735 /* This macro is to avoid lots of duplicated code in the body of the
2736 loop over relocations in xxx_relocate_section() in the various
2739 Handle relocations against symbols from removed linkonce sections,
2740 or sections discarded by a linker script. When doing a relocatable
2741 link, we remove such relocations. Otherwise, we just want the
2742 section contents zeroed and avoid any special processing. */
2743 #define RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
2744 rel, count, relend, \
2745 howto, index, contents) \
2748 _bfd_clear_contents (howto, input_bfd, input_section, \
2749 contents + rel[index].r_offset); \
2751 if (bfd_link_relocatable (info) \
2752 && (input_section->flags & SEC_DEBUGGING)) \
2754 /* Only remove relocations in debug sections since other \
2755 sections may require relocations. */ \
2756 Elf_Internal_Shdr *rel_hdr; \
2758 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
2760 /* Avoid empty output section. */ \
2761 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
2763 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
2764 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
2765 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
2767 memmove (rel, rel + count, \
2768 (relend - rel - count) * sizeof (*rel)); \
2770 input_section->reloc_count--; \
2777 for (i_ = 0; i_ < count; i_++) \
2779 rel[i_].r_info = 0; \
2780 rel[i_].r_addend = 0; \
2786 /* Will a symbol be bound to the definition within the shared
2787 library, if any. A unique symbol can never be bound locally. */
2788 #define SYMBOLIC_BIND(INFO, H) \
2789 (!(H)->unique_global \
2790 && ((INFO)->symbolic || ((INFO)->dynamic && !(H)->dynamic)))
2795 #endif /* _LIBELF_H_ */