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 /* True if we have marked relocations associated with this CIE. */
330 unsigned int gc_mark : 1;
332 /* True if we have decided to turn an absolute LSDA encoding into
333 a PC-relative one. */
334 unsigned int make_lsda_relative : 1;
336 /* True if we have decided to turn an absolute personality
337 encoding into a PC-relative one. */
338 unsigned int make_per_encoding_relative : 1;
340 /* True if the CIE contains personality data and if that
341 data uses a PC-relative encoding. Always true when
342 make_per_encoding_relative is. */
343 unsigned int per_encoding_relative : 1;
345 /* True if the CIE contains personality data aligned to a
346 multiple of eight bytes. */
347 unsigned int per_encoding_aligned8 : 1;
349 /* True if we need to add an 'R' (FDE encoding) entry to the
350 CIE's augmentation data. */
351 unsigned int add_fde_encoding : 1;
353 /* True if we have merged this CIE with another. */
354 unsigned int merged : 1;
357 unsigned int pad1 : 17;
360 unsigned int reloc_index;
363 unsigned int new_offset;
364 unsigned int fde_encoding : 8;
365 unsigned int lsda_encoding : 8;
366 unsigned int lsda_offset : 8;
368 /* True if this entry represents a CIE, false if it represents an FDE. */
369 unsigned int cie : 1;
371 /* True if this entry is currently marked for removal. */
372 unsigned int removed : 1;
374 /* True if we need to add a 'z' (augmentation size) entry to the CIE's
375 augmentation data, and an associated byte to each of the CIE's FDEs. */
376 unsigned int add_augmentation_size : 1;
378 /* True if we have decided to convert absolute FDE relocations into
379 relative ones. This applies to the first relocation in the FDE,
380 which is against the code that the FDE describes. */
381 unsigned int make_relative : 1;
384 unsigned int pad1 : 4;
386 unsigned int *set_loc;
389 struct eh_frame_sec_info
393 struct eh_cie_fde entry[1];
396 struct eh_frame_array_ent
405 #define DWARF2_EH_HDR 1
406 #define COMPACT_EH_HDR 2
408 /* Endian-neutral code indicating that a function cannot be unwound. */
409 #define COMPACT_EH_CANT_UNWIND_OPCODE 0x015d5d01
411 struct dwarf_eh_frame_hdr_info
414 unsigned int fde_count;
415 /* TRUE if .eh_frame_hdr should contain the sorted search table.
416 We build it if we successfully read all .eh_frame input sections
417 and recognize them. */
419 struct eh_frame_array_ent *array;
422 struct compact_eh_frame_hdr_info
424 unsigned int allocated_entries;
425 /* eh_frame_entry fragments. */
429 struct eh_frame_hdr_info
432 unsigned int array_count;
433 bfd_boolean frame_hdr_is_compact;
436 struct dwarf_eh_frame_hdr_info dwarf;
437 struct compact_eh_frame_hdr_info compact;
442 /* Enum used to identify target specific extensions to the elf_obj_tdata
443 and elf_link_hash_table structures. Note the enums deliberately start
444 from 1 so that we can detect an uninitialized field. The generic value
445 is last so that additions to this enum do not need to modify more than
449 AARCH64_ELF_DATA = 1,
489 struct elf_sym_strtab
491 Elf_Internal_Sym sym;
492 unsigned long dest_index;
493 unsigned long destshndx_index;
496 /* ELF linker hash table. */
498 struct elf_link_hash_table
500 struct bfd_link_hash_table root;
502 /* An identifier used to distinguish different target
503 specific extensions to this structure. */
504 enum elf_target_id hash_table_id;
506 /* Whether we have created the special dynamic sections required
507 when linking against or generating a shared object. */
508 bfd_boolean dynamic_sections_created;
510 /* True if this target has relocatable executables, so needs dynamic
512 bfd_boolean is_relocatable_executable;
514 /* The BFD used to hold special sections created by the linker.
515 This will be the first BFD found which requires these sections to
519 /* The value to use when initialising got.refcount/offset and
520 plt.refcount/offset in an elf_link_hash_entry. Set to zero when
521 the values are refcounts. Set to init_got_offset/init_plt_offset
522 in size_dynamic_sections when the values may be offsets. */
523 union gotplt_union init_got_refcount;
524 union gotplt_union init_plt_refcount;
526 /* The value to use for got.refcount/offset and plt.refcount/offset
527 when the values may be offsets. Normally (bfd_vma) -1. */
528 union gotplt_union init_got_offset;
529 union gotplt_union init_plt_offset;
531 /* The number of symbols found in the link which is intended for the
532 mandatory DT_SYMTAB tag (.dynsym section) in .dynamic section. */
533 bfd_size_type dynsymcount;
534 bfd_size_type local_dynsymcount;
536 /* The string table of dynamic symbols, which becomes the .dynstr
538 struct elf_strtab_hash *dynstr;
540 /* The number of symbol strings found in the link which must be put
541 into the .strtab section. */
542 bfd_size_type strtabcount;
544 /* The array size of the symbol string table, which becomes the
546 bfd_size_type strtabsize;
548 /* The array of strings, which becomes the .strtab section. */
549 struct elf_sym_strtab *strtab;
551 /* The number of buckets in the hash table in the .hash section.
552 This is based on the number of dynamic symbols. */
553 bfd_size_type bucketcount;
555 /* A linked list of DT_NEEDED names found in dynamic objects
556 included in the link. */
557 struct bfd_link_needed_list *needed;
559 /* Sections in the output bfd that provides a section symbol
560 to be used by relocations emitted against local symbols.
561 Most targets will not use data_index_section. */
562 asection *text_index_section;
563 asection *data_index_section;
565 /* The _GLOBAL_OFFSET_TABLE_ symbol. */
566 struct elf_link_hash_entry *hgot;
568 /* The _PROCEDURE_LINKAGE_TABLE_ symbol. */
569 struct elf_link_hash_entry *hplt;
571 /* The _DYNAMIC symbol. */
572 struct elf_link_hash_entry *hdynamic;
574 /* A pointer to information used to merge SEC_MERGE sections. */
577 /* Used to link stabs in sections. */
578 struct stab_info stab_info;
580 /* Used by eh_frame code when editing .eh_frame. */
581 struct eh_frame_hdr_info eh_info;
583 /* A linked list of local symbols to be added to .dynsym. */
584 struct elf_link_local_dynamic_entry *dynlocal;
586 /* A linked list of DT_RPATH/DT_RUNPATH names found in dynamic
587 objects included in the link. */
588 struct bfd_link_needed_list *runpath;
590 /* Cached first output tls section and size of PT_TLS segment. */
592 bfd_size_type tls_size;
594 /* A linked list of BFD's loaded in the link. */
595 struct elf_link_loaded_list *loaded;
597 /* Short-cuts to get to dynamic linker sections. */
606 asection *sreldynrelro;
614 /* Look up an entry in an ELF linker hash table. */
616 #define elf_link_hash_lookup(table, string, create, copy, follow) \
617 ((struct elf_link_hash_entry *) \
618 bfd_link_hash_lookup (&(table)->root, (string), (create), \
621 /* Traverse an ELF linker hash table. */
623 #define elf_link_hash_traverse(table, func, info) \
624 (bfd_link_hash_traverse \
626 (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func), \
629 /* Get the ELF linker hash table from a link_info structure. */
631 #define elf_hash_table(p) ((struct elf_link_hash_table *) ((p)->hash))
633 #define elf_hash_table_id(table) ((table) -> hash_table_id)
635 /* Returns TRUE if the hash table is a struct elf_link_hash_table. */
636 #define is_elf_hash_table(htab) \
637 (((struct bfd_link_hash_table *) (htab))->type == bfd_link_elf_hash_table)
639 /* Used by bfd_sym_from_r_symndx to cache a small number of local
641 #define LOCAL_SYM_CACHE_SIZE 32
645 unsigned long indx[LOCAL_SYM_CACHE_SIZE];
646 Elf_Internal_Sym sym[LOCAL_SYM_CACHE_SIZE];
649 /* Constant information held for an ELF backend. */
651 struct elf_size_info {
652 unsigned char sizeof_ehdr, sizeof_phdr, sizeof_shdr;
653 unsigned char sizeof_rel, sizeof_rela, sizeof_sym, sizeof_dyn, sizeof_note;
655 /* The size of entries in the .hash section. */
656 unsigned char sizeof_hash_entry;
658 /* The number of internal relocations to allocate per external
660 unsigned char int_rels_per_ext_rel;
661 /* We use some fixed size arrays. This should be large enough to
662 handle all back-ends. */
663 #define MAX_INT_RELS_PER_EXT_REL 3
665 unsigned char arch_size, log_file_align;
666 unsigned char elfclass, ev_current;
667 int (*write_out_phdrs)
668 (bfd *, const Elf_Internal_Phdr *, unsigned int);
670 (*write_shdrs_and_ehdr) (bfd *);
671 bfd_boolean (*checksum_contents)
672 (bfd * , void (*) (const void *, size_t, void *), void *);
674 (bfd *, asection *, void *);
675 bfd_boolean (*swap_symbol_in)
676 (bfd *, const void *, const void *, Elf_Internal_Sym *);
677 void (*swap_symbol_out)
678 (bfd *, const Elf_Internal_Sym *, void *, void *);
679 bfd_boolean (*slurp_reloc_table)
680 (bfd *, asection *, asymbol **, bfd_boolean);
681 long (*slurp_symbol_table)
682 (bfd *, asymbol **, bfd_boolean);
684 (bfd *, const void *, Elf_Internal_Dyn *);
686 (bfd *, const Elf_Internal_Dyn *, void *);
688 /* This function is called to swap in a REL relocation. If an
689 external relocation corresponds to more than one internal
690 relocation, then all relocations are swapped in at once. */
691 void (*swap_reloc_in)
692 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
694 /* This function is called to swap out a REL relocation. */
695 void (*swap_reloc_out)
696 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
698 /* This function is called to swap in a RELA relocation. If an
699 external relocation corresponds to more than one internal
700 relocation, then all relocations are swapped in at once. */
701 void (*swap_reloca_in)
702 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
704 /* This function is called to swap out a RELA relocation. */
705 void (*swap_reloca_out)
706 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
709 #define elf_symbol_from(ABFD,S) \
710 (((S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \
711 && (S)->the_bfd->tdata.elf_obj_data != 0) \
712 ? (elf_symbol_type *) (S) \
715 enum elf_reloc_type_class {
717 reloc_class_relative,
723 struct elf_reloc_cookie
725 Elf_Internal_Rela *rels, *rel, *relend;
726 Elf_Internal_Sym *locsyms;
730 struct elf_link_hash_entry **sym_hashes;
732 bfd_boolean bad_symtab;
735 /* The level of IRIX compatibility we're striving for. */
743 /* Mapping of ELF section names and types. */
744 struct bfd_elf_special_section
747 unsigned int prefix_length;
748 /* 0 means name must match PREFIX exactly.
749 -1 means name must start with PREFIX followed by an arbitrary string.
750 -2 means name must match PREFIX exactly or consist of PREFIX followed
751 by a dot then anything.
752 > 0 means name must start with the first PREFIX_LENGTH chars of
753 PREFIX and finish with the last SUFFIX_LENGTH chars of PREFIX. */
754 signed int suffix_length;
759 enum action_discarded
765 typedef asection * (*elf_gc_mark_hook_fn)
766 (asection *, struct bfd_link_info *, Elf_Internal_Rela *,
767 struct elf_link_hash_entry *, Elf_Internal_Sym *);
769 enum elf_property_kind
771 /* A new property. */
772 property_unknown = 0,
773 /* A property ignored by backend. */
775 /* A corrupt property reported by backend. */
777 /* A property should be removed due to property merge. */
779 /* A property which is a number. */
783 typedef struct elf_property
785 unsigned int pr_type;
786 unsigned int pr_datasz;
789 /* For property_number, this is a number. */
791 /* Add a new one if elf_property_kind is updated. */
793 enum elf_property_kind pr_kind;
796 typedef struct elf_property_list
798 struct elf_property_list *next;
799 struct elf_property property;
802 struct bfd_elf_section_reloc_data;
804 struct elf_backend_data
806 /* The architecture for this backend. */
807 enum bfd_architecture arch;
809 /* An identifier used to distinguish different target specific
810 extensions to elf_obj_tdata and elf_link_hash_table structures. */
811 enum elf_target_id target_id;
813 /* The ELF machine code (EM_xxxx) for this backend. */
814 int elf_machine_code;
819 /* The maximum page size for this backend. */
822 /* The minimum page size for this backend. An input object will not be
823 considered page aligned unless its sections are correctly aligned for
824 pages at least this large. May be smaller than maxpagesize. */
827 /* The common page size for this backend. */
828 bfd_vma commonpagesize;
830 /* The BFD flags applied to sections created for dynamic linking. */
831 flagword dynamic_sec_flags;
833 /* Architecture-specific data for this backend.
834 This is actually a pointer to some type like struct elf_ARCH_data. */
835 const void *arch_data;
837 /* A function to translate an ELF RELA relocation to a BFD arelent
839 void (*elf_info_to_howto)
840 (bfd *, arelent *, Elf_Internal_Rela *);
842 /* A function to translate an ELF REL relocation to a BFD arelent
844 void (*elf_info_to_howto_rel)
845 (bfd *, arelent *, Elf_Internal_Rela *);
847 /* A function to determine whether a symbol is global when
848 partitioning the symbol table into local and global symbols.
849 This should be NULL for most targets, in which case the correct
850 thing will be done. MIPS ELF, at least on the Irix 5, has
851 special requirements. */
852 bfd_boolean (*elf_backend_sym_is_global)
855 /* The remaining functions are hooks which are called only if they
858 /* A function to permit a backend specific check on whether a
859 particular BFD format is relevant for an object file, and to
860 permit the backend to set any global information it wishes. When
861 this is called elf_elfheader is set, but anything else should be
862 used with caution. If this returns FALSE, the check_format
863 routine will return a bfd_error_wrong_format error. */
864 bfd_boolean (*elf_backend_object_p)
867 /* A function to do additional symbol processing when reading the
868 ELF symbol table. This is where any processor-specific special
869 section indices are handled. */
870 void (*elf_backend_symbol_processing)
873 /* A function to do additional symbol processing after reading the
874 entire ELF symbol table. */
875 bfd_boolean (*elf_backend_symbol_table_processing)
876 (bfd *, elf_symbol_type *, unsigned int);
878 /* A function to set the type of the info field. Processor-specific
879 types should be handled here. */
880 int (*elf_backend_get_symbol_type)
881 (Elf_Internal_Sym *, int);
883 /* A function to return the linker hash table entry of a symbol that
884 might be satisfied by an archive symbol. */
885 struct elf_link_hash_entry * (*elf_backend_archive_symbol_lookup)
886 (bfd *, struct bfd_link_info *, const char *);
888 /* Return true if local section symbols should have a non-null st_name.
889 NULL implies false. */
890 bfd_boolean (*elf_backend_name_local_section_symbols)
893 /* A function to do additional processing on the ELF section header
894 just before writing it out. This is used to set the flags and
895 type fields for some sections, or to actually write out data for
897 bfd_boolean (*elf_backend_section_processing)
898 (bfd *, Elf_Internal_Shdr *);
900 /* A function to handle unusual section types when creating BFD
901 sections from ELF sections. */
902 bfd_boolean (*elf_backend_section_from_shdr)
903 (bfd *, Elf_Internal_Shdr *, const char *, int);
905 /* A function to convert machine dependent ELF section header flags to
906 BFD internal section header flags. */
907 bfd_boolean (*elf_backend_section_flags)
908 (flagword *, const Elf_Internal_Shdr *);
910 /* A function that returns a struct containing ELF section flags and
911 type for the given BFD section. */
912 const struct bfd_elf_special_section * (*get_sec_type_attr)
915 /* A function to handle unusual program segment types when creating BFD
916 sections from ELF program segments. */
917 bfd_boolean (*elf_backend_section_from_phdr)
918 (bfd *, Elf_Internal_Phdr *, int, const char *);
920 /* A function to set up the ELF section header for a BFD section in
921 preparation for writing it out. This is where the flags and type
922 fields are set for unusual sections. */
923 bfd_boolean (*elf_backend_fake_sections)
924 (bfd *, Elf_Internal_Shdr *, asection *);
926 /* A function to get the ELF section index for a BFD section. If
927 this returns TRUE, the section was found. If it is a normal ELF
928 section, *RETVAL should be left unchanged. If it is not a normal
929 ELF section *RETVAL should be set to the SHN_xxxx index. */
930 bfd_boolean (*elf_backend_section_from_bfd_section)
931 (bfd *, asection *, int *retval);
933 /* If this field is not NULL, it is called by the add_symbols phase
934 of a link just before adding a symbol to the global linker hash
935 table. It may modify any of the fields as it wishes. If *NAME
936 is set to NULL, the symbol will be skipped rather than being
937 added to the hash table. This function is responsible for
938 handling all processor dependent symbol bindings and section
939 indices, and must set at least *FLAGS and *SEC for each processor
940 dependent case; failure to do so will cause a link error. */
941 bfd_boolean (*elf_add_symbol_hook)
942 (bfd *abfd, struct bfd_link_info *info, Elf_Internal_Sym *,
943 const char **name, flagword *flags, asection **sec, bfd_vma *value);
945 /* If this field is not NULL, it is called by the elf_link_output_sym
946 phase of a link for each symbol which will appear in the object file.
947 On error, this function returns 0. 1 is returned when the symbol
948 should be output, 2 is returned when the symbol should be discarded. */
949 int (*elf_backend_link_output_symbol_hook)
950 (struct bfd_link_info *info, const char *, Elf_Internal_Sym *,
951 asection *, struct elf_link_hash_entry *);
953 /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend
954 linker the first time it encounters a dynamic object in the link.
955 This function must create any sections required for dynamic
956 linking. The ABFD argument is a dynamic object. The .interp,
957 .dynamic, .dynsym, .dynstr, and .hash functions have already been
958 created, and this function may modify the section flags if
959 desired. This function will normally create the .got and .plt
960 sections, but different backends have different requirements. */
961 bfd_boolean (*elf_backend_create_dynamic_sections)
962 (bfd *abfd, struct bfd_link_info *info);
964 /* When creating a shared library, determine whether to omit the
965 dynamic symbol for the section. */
966 bfd_boolean (*elf_backend_omit_section_dynsym)
967 (bfd *output_bfd, struct bfd_link_info *info, asection *osec);
969 /* Return TRUE if relocations of targets are compatible to the extent
970 that CHECK_RELOCS will properly process them. PR 4424. */
971 bfd_boolean (*relocs_compatible) (const bfd_target *, const bfd_target *);
973 /* The CHECK_RELOCS function is called by the add_symbols phase of
974 the ELF backend linker. It is called once for each section with
975 relocs of an object file, just after the symbols for the object
976 file have been added to the global linker hash table. The
977 function must look through the relocs and do any special handling
978 required. This generally means allocating space in the global
979 offset table, and perhaps allocating space for a reloc. The
980 relocs are always passed as Rela structures; if the section
981 actually uses Rel structures, the r_addend field will always be
983 bfd_boolean (*check_relocs)
984 (bfd *abfd, struct bfd_link_info *info, asection *o,
985 const Elf_Internal_Rela *relocs);
987 /* The CHECK_DIRECTIVES function is called once per input file by
988 the add_symbols phase of the ELF backend linker. The function
989 must inspect the bfd and create any additional symbols according
990 to any custom directives in the bfd. */
991 bfd_boolean (*check_directives)
992 (bfd *abfd, struct bfd_link_info *info);
994 /* The NOTICE_AS_NEEDED function is called as the linker is about to
995 handle an as-needed lib (ACT = notice_as_needed), and after the
996 linker has decided to keep the lib (ACT = notice_needed) or when
997 the lib is not needed (ACT = notice_not_needed). */
998 bfd_boolean (*notice_as_needed)
999 (bfd *abfd, struct bfd_link_info *info, enum notice_asneeded_action act);
1001 /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
1002 linker for every symbol which is defined by a dynamic object and
1003 referenced by a regular object. This is called after all the
1004 input files have been seen, but before the SIZE_DYNAMIC_SECTIONS
1005 function has been called. The hash table entry should be
1006 bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be
1007 defined in a section from a dynamic object. Dynamic object
1008 sections are not included in the final link, and this function is
1009 responsible for changing the value to something which the rest of
1010 the link can deal with. This will normally involve adding an
1011 entry to the .plt or .got or some such section, and setting the
1012 symbol to point to that. */
1013 bfd_boolean (*elf_backend_adjust_dynamic_symbol)
1014 (struct bfd_link_info *info, struct elf_link_hash_entry *h);
1016 /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker
1017 after all the linker input files have been seen but before the
1018 section sizes have been set. This is called after
1019 ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS. */
1020 bfd_boolean (*elf_backend_always_size_sections)
1021 (bfd *output_bfd, struct bfd_link_info *info);
1023 /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend
1024 linker after all the linker input files have been seen but before
1025 the sections sizes have been set. This is called after
1026 ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols.
1027 It is only called when linking against a dynamic object. It must
1028 set the sizes of the dynamic sections, and may fill in their
1029 contents as well. The generic ELF linker can handle the .dynsym,
1030 .dynstr and .hash sections. This function must handle the
1031 .interp section and any sections created by the
1032 CREATE_DYNAMIC_SECTIONS entry point. */
1033 bfd_boolean (*elf_backend_size_dynamic_sections)
1034 (bfd *output_bfd, struct bfd_link_info *info);
1036 /* Set TEXT_INDEX_SECTION and DATA_INDEX_SECTION, the output sections
1037 we keep to use as a base for relocs and symbols. */
1038 void (*elf_backend_init_index_section)
1039 (bfd *output_bfd, struct bfd_link_info *info);
1041 /* The RELOCATE_SECTION function is called by the ELF backend linker
1042 to handle the relocations for a section.
1044 The relocs are always passed as Rela structures; if the section
1045 actually uses Rel structures, the r_addend field will always be
1048 This function is responsible for adjust the section contents as
1049 necessary, and (if using Rela relocs and generating a
1050 relocatable output file) adjusting the reloc addend as
1053 This function does not have to worry about setting the reloc
1054 address or the reloc symbol index.
1056 LOCAL_SYMS is a pointer to the swapped in local symbols.
1058 LOCAL_SECTIONS is an array giving the section in the input file
1059 corresponding to the st_shndx field of each local symbol.
1061 The global hash table entry for the global symbols can be found
1062 via elf_sym_hashes (input_bfd).
1064 When generating relocatable output, this function must handle
1065 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
1066 going to be the section symbol corresponding to the output
1067 section, which means that the addend must be adjusted
1070 Returns FALSE on error, TRUE on success, 2 if successful and
1071 relocations should be written for this section. */
1072 int (*elf_backend_relocate_section)
1073 (bfd *output_bfd, struct bfd_link_info *info, bfd *input_bfd,
1074 asection *input_section, bfd_byte *contents, Elf_Internal_Rela *relocs,
1075 Elf_Internal_Sym *local_syms, asection **local_sections);
1077 /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend
1078 linker just before it writes a symbol out to the .dynsym section.
1079 The processor backend may make any required adjustment to the
1080 symbol. It may also take the opportunity to set contents of the
1081 dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on
1082 all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called
1083 on those symbols which are defined by a dynamic object. */
1084 bfd_boolean (*elf_backend_finish_dynamic_symbol)
1085 (bfd *output_bfd, struct bfd_link_info *info,
1086 struct elf_link_hash_entry *h, Elf_Internal_Sym *sym);
1088 /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend
1089 linker just before it writes all the dynamic sections out to the
1090 output file. The FINISH_DYNAMIC_SYMBOL will have been called on
1091 all dynamic symbols. */
1092 bfd_boolean (*elf_backend_finish_dynamic_sections)
1093 (bfd *output_bfd, struct bfd_link_info *info);
1095 /* A function to do any beginning processing needed for the ELF file
1096 before building the ELF headers and computing file positions. */
1097 void (*elf_backend_begin_write_processing)
1098 (bfd *, struct bfd_link_info *);
1100 /* A function to do any final processing needed for the ELF file
1101 before writing it out. The LINKER argument is TRUE if this BFD
1102 was created by the ELF backend linker. */
1103 void (*elf_backend_final_write_processing)
1104 (bfd *, bfd_boolean linker);
1106 /* This function is called by get_program_header_size. It should
1107 return the number of additional program segments which this BFD
1108 will need. It should return -1 on error. */
1109 int (*elf_backend_additional_program_headers)
1110 (bfd *, struct bfd_link_info *);
1112 /* This function is called to modify an existing segment map in a
1113 backend specific fashion. */
1114 bfd_boolean (*elf_backend_modify_segment_map)
1115 (bfd *, struct bfd_link_info *);
1117 /* This function is called to modify program headers just before
1118 they are written. */
1119 bfd_boolean (*elf_backend_modify_program_headers)
1120 (bfd *, struct bfd_link_info *);
1122 /* This function is called to see if the PHDR header should be
1123 checked for validity. */
1124 bfd_boolean (*elf_backend_allow_non_load_phdr)
1125 (bfd *, const Elf_Internal_Phdr *, unsigned);
1127 /* This function is called before section garbage collection to
1128 mark entry symbol sections. */
1130 (struct bfd_link_info *);
1132 /* This function is called during section garbage collection to
1133 mark sections that define global symbols. */
1134 bfd_boolean (*gc_mark_dynamic_ref)
1135 (struct elf_link_hash_entry *, void *);
1137 /* This function is called during section gc to discover the section a
1138 particular relocation refers to. */
1139 elf_gc_mark_hook_fn gc_mark_hook;
1141 /* This function, if defined, is called after the first gc marking pass
1142 to allow the backend to mark additional sections. */
1143 bfd_boolean (*gc_mark_extra_sections)
1144 (struct bfd_link_info *, elf_gc_mark_hook_fn);
1146 /* This function, if defined, is called during the sweep phase of gc
1147 in order that a backend might update any data structures it might
1149 bfd_boolean (*gc_sweep_hook)
1150 (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *);
1152 /* This function, if defined, is called after the ELF headers have
1153 been created. This allows for things like the OS and ABI versions
1155 void (*elf_backend_post_process_headers)
1156 (bfd *, struct bfd_link_info *);
1158 /* This function, if defined, prints a symbol to file and returns the
1159 name of the symbol to be printed. It should return NULL to fall
1160 back to default symbol printing. */
1161 const char *(*elf_backend_print_symbol_all)
1162 (bfd *, void *, asymbol *);
1164 /* This function, if defined, is called after all local symbols and
1165 global symbols converted to locals are emitted into the symtab
1166 section. It allows the backend to emit special local symbols
1167 not handled in the hash table. */
1168 bfd_boolean (*elf_backend_output_arch_local_syms)
1169 (bfd *, struct bfd_link_info *, void *,
1170 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym *, asection *,
1171 struct elf_link_hash_entry *));
1173 /* This function, if defined, is called after all symbols are emitted
1174 into the symtab section. It allows the backend to emit special
1175 global symbols not handled in the hash table. */
1176 bfd_boolean (*elf_backend_output_arch_syms)
1177 (bfd *, struct bfd_link_info *, void *,
1178 bfd_boolean (*) (void *, const char *, Elf_Internal_Sym *, asection *,
1179 struct elf_link_hash_entry *));
1181 /* Filter what symbols of the output file to include in the import
1182 library if one is created. */
1183 unsigned int (*elf_backend_filter_implib_symbols)
1184 (bfd *, struct bfd_link_info *, asymbol **, long);
1186 /* Copy any information related to dynamic linking from a pre-existing
1187 symbol to a newly created symbol. Also called to copy flags and
1188 other back-end info to a weakdef, in which case the symbol is not
1189 newly created and plt/got refcounts and dynamic indices should not
1191 void (*elf_backend_copy_indirect_symbol)
1192 (struct bfd_link_info *, struct elf_link_hash_entry *,
1193 struct elf_link_hash_entry *);
1195 /* Modify any information related to dynamic linking such that the
1196 symbol is not exported. */
1197 void (*elf_backend_hide_symbol)
1198 (struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean);
1200 /* A function to do additional symbol fixup, called by
1201 _bfd_elf_fix_symbol_flags. */
1202 bfd_boolean (*elf_backend_fixup_symbol)
1203 (struct bfd_link_info *, struct elf_link_hash_entry *);
1205 /* Merge the backend specific symbol attribute. */
1206 void (*elf_backend_merge_symbol_attribute)
1207 (struct elf_link_hash_entry *, const Elf_Internal_Sym *, bfd_boolean,
1210 /* This function, if defined, will return a string containing the
1211 name of a target-specific dynamic tag. */
1212 char *(*elf_backend_get_target_dtag)
1215 /* Decide whether an undefined symbol is special and can be ignored.
1216 This is the case for OPTIONAL symbols on IRIX. */
1217 bfd_boolean (*elf_backend_ignore_undef_symbol)
1218 (struct elf_link_hash_entry *);
1220 /* Emit relocations. Overrides default routine for emitting relocs,
1221 except during a relocatable link, or if all relocs are being emitted. */
1222 bfd_boolean (*elf_backend_emit_relocs)
1223 (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *,
1224 struct elf_link_hash_entry **);
1226 /* Update relocations. It is allowed to change the number and the order.
1227 In such a case hashes should be invalidated. */
1228 void (*elf_backend_update_relocs)
1229 (asection *, struct bfd_elf_section_reloc_data *);
1231 /* Count relocations. Not called for relocatable links
1232 or if all relocs are being preserved in the output. */
1233 unsigned int (*elf_backend_count_relocs)
1234 (struct bfd_link_info *, asection *);
1236 /* Count additionals relocations. Called for relocatable links if
1237 additional relocations needs to be created. */
1238 unsigned int (*elf_backend_count_additional_relocs)
1241 /* Say whether to sort relocs output by ld -r and ld --emit-relocs,
1242 by r_offset. If NULL, default to true. */
1243 bfd_boolean (*sort_relocs_p)
1246 /* This function, if defined, is called when an NT_PRSTATUS note is found
1248 bfd_boolean (*elf_backend_grok_prstatus)
1249 (bfd *, Elf_Internal_Note *);
1251 /* This function, if defined, is called when an NT_PSINFO or NT_PRPSINFO
1252 note is found in a core file. */
1253 bfd_boolean (*elf_backend_grok_psinfo)
1254 (bfd *, Elf_Internal_Note *);
1256 /* This function, if defined, is called to write a note to a corefile. */
1257 char *(*elf_backend_write_core_note)
1258 (bfd *abfd, char *buf, int *bufsiz, int note_type, ...);
1260 /* This function, if defined, is called to convert target-specific
1261 section flag names into hex values. */
1262 flagword (*elf_backend_lookup_section_flags_hook)
1265 /* This function returns class of a reloc type. */
1266 enum elf_reloc_type_class (*elf_backend_reloc_type_class)
1267 (const struct bfd_link_info *, const asection *, const Elf_Internal_Rela *);
1269 /* This function, if defined, removes information about discarded functions
1270 from other sections which mention them. */
1271 bfd_boolean (*elf_backend_discard_info)
1272 (bfd *, struct elf_reloc_cookie *, struct bfd_link_info *);
1274 /* This function, if defined, signals that the function above has removed
1275 the discarded relocations for this section. */
1276 bfd_boolean (*elf_backend_ignore_discarded_relocs)
1279 /* What to do when ld finds relocations against symbols defined in
1280 discarded sections. */
1281 unsigned int (*action_discarded)
1284 /* This function returns the width of FDE pointers in bytes, or 0 if
1285 that can't be determined for some reason. The default definition
1286 goes by the bfd's EI_CLASS. */
1287 unsigned int (*elf_backend_eh_frame_address_size)
1288 (bfd *, asection *);
1290 /* These functions tell elf-eh-frame whether to attempt to turn
1291 absolute or lsda encodings into pc-relative ones. The default
1292 definition enables these transformations. */
1293 bfd_boolean (*elf_backend_can_make_relative_eh_frame)
1294 (bfd *, struct bfd_link_info *, asection *);
1295 bfd_boolean (*elf_backend_can_make_lsda_relative_eh_frame)
1296 (bfd *, struct bfd_link_info *, asection *);
1298 /* This function returns an encoding after computing the encoded
1299 value (and storing it in ENCODED) for the given OFFSET into OSEC,
1300 to be stored in at LOC_OFFSET into the LOC_SEC input section.
1301 The default definition chooses a 32-bit PC-relative encoding. */
1302 bfd_byte (*elf_backend_encode_eh_address)
1303 (bfd *abfd, struct bfd_link_info *info,
1304 asection *osec, bfd_vma offset,
1305 asection *loc_sec, bfd_vma loc_offset,
1308 /* This function, if defined, may write out the given section.
1309 Returns TRUE if it did so and FALSE if the caller should. */
1310 bfd_boolean (*elf_backend_write_section)
1311 (bfd *, struct bfd_link_info *, asection *, bfd_byte *);
1313 /* The level of IRIX compatibility we're striving for.
1314 MIPS ELF specific function. */
1315 irix_compat_t (*elf_backend_mips_irix_compat)
1318 reloc_howto_type *(*elf_backend_mips_rtype_to_howto)
1319 (unsigned int, bfd_boolean);
1321 /* The swapping table to use when dealing with ECOFF information.
1322 Used for the MIPS ELF .mdebug section. */
1323 const struct ecoff_debug_swap *elf_backend_ecoff_debug_swap;
1325 /* This function implements `bfd_elf_bfd_from_remote_memory';
1326 see elf.c, elfcode.h. */
1327 bfd *(*elf_backend_bfd_from_remote_memory)
1328 (bfd *templ, bfd_vma ehdr_vma, bfd_size_type size, bfd_vma *loadbasep,
1329 int (*target_read_memory) (bfd_vma vma, bfd_byte *myaddr,
1330 bfd_size_type len));
1332 /* This function is used by `_bfd_elf_get_synthetic_symtab';
1334 bfd_vma (*plt_sym_val) (bfd_vma, const asection *, const arelent *);
1336 /* Is symbol defined in common section? */
1337 bfd_boolean (*common_definition) (Elf_Internal_Sym *);
1339 /* Return a common section index for section. */
1340 unsigned int (*common_section_index) (asection *);
1342 /* Return a common section for section. */
1343 asection *(*common_section) (asection *);
1345 /* Return TRUE if we can merge 2 definitions. */
1346 bfd_boolean (*merge_symbol) (struct elf_link_hash_entry *,
1347 const Elf_Internal_Sym *, asection **,
1348 bfd_boolean, bfd_boolean,
1349 bfd *, const asection *);
1351 /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */
1352 bfd_boolean (*elf_hash_symbol) (struct elf_link_hash_entry *);
1354 /* Return TRUE if type is a function symbol type. */
1355 bfd_boolean (*is_function_type) (unsigned int type);
1357 /* If the ELF symbol SYM might be a function in SEC, return the
1358 function size and set *CODE_OFF to the function's entry point,
1359 otherwise return zero. */
1360 bfd_size_type (*maybe_function_sym) (const asymbol *sym, asection *sec,
1363 /* Given NAME, the name of a relocation section stripped of its
1364 .rel/.rela prefix, return the section in ABFD to which the
1365 relocations apply. */
1366 asection *(*get_reloc_section) (bfd *abfd, const char *name);
1368 /* Called to set the sh_flags, sh_link and sh_info fields of OSECTION which
1369 has a type >= SHT_LOOS. Returns TRUE if the fields were initialised,
1370 FALSE otherwise. Can be called multiple times for a given section,
1371 until it returns TRUE. Most of the times it is called ISECTION will be
1372 set to an input section that might be associated with the output section.
1373 The last time that it is called, ISECTION will be set to NULL. */
1374 bfd_boolean (*elf_backend_copy_special_section_fields)
1375 (const bfd *ibfd, bfd *obfd, const Elf_Internal_Shdr *isection,
1376 Elf_Internal_Shdr *osection);
1378 /* Used to handle bad SHF_LINK_ORDER input. */
1379 void (*link_order_error_handler) (const char *, ...);
1381 /* Name of the PLT relocation section. */
1382 const char *relplt_name;
1384 /* Alternate EM_xxxx machine codes for this backend. */
1385 int elf_machine_alt1;
1386 int elf_machine_alt2;
1388 const struct elf_size_info *s;
1390 /* An array of target specific special sections. */
1391 const struct bfd_elf_special_section *special_sections;
1393 /* The size in bytes of the header for the GOT. This includes the
1394 so-called reserved entries on some systems. */
1395 bfd_vma got_header_size;
1397 /* The size of the GOT entry for the symbol pointed to by H if non-NULL,
1398 otherwise by the local symbol with index SYMNDX in IBFD. */
1399 bfd_vma (*got_elt_size) (bfd *, struct bfd_link_info *,
1400 struct elf_link_hash_entry *h,
1401 bfd *ibfd, unsigned long symndx);
1403 /* The vendor name to use for a processor-standard attributes section. */
1404 const char *obj_attrs_vendor;
1406 /* The section name to use for a processor-standard attributes section. */
1407 const char *obj_attrs_section;
1409 /* Return 1, 2 or 3 to indicate what type of arguments a
1410 processor-specific tag takes. */
1411 int (*obj_attrs_arg_type) (int);
1413 /* The section type to use for an attributes section. */
1414 unsigned int obj_attrs_section_type;
1416 /* This function determines the order in which any attributes are
1417 written. It must be defined for input in the range
1418 LEAST_KNOWN_OBJ_ATTRIBUTE..NUM_KNOWN_OBJ_ATTRIBUTES-1 (this range
1419 is used in order to make unity easy). The returned value is the
1420 actual tag number to place in the input position. */
1421 int (*obj_attrs_order) (int);
1423 /* Handle merging unknown attributes; either warn and return TRUE,
1424 or give an error and return FALSE. */
1425 bfd_boolean (*obj_attrs_handle_unknown) (bfd *, int);
1427 /* Parse GNU properties. Return the property kind. If the property
1428 is corrupt, issue an error message and return property_corrupt. */
1429 enum elf_property_kind (*parse_gnu_properties) (bfd *, unsigned int,
1433 /* Merge GNU properties. Return TRUE if property is updated. */
1434 bfd_boolean (*merge_gnu_properties) (bfd *, elf_property *,
1437 /* Set up GNU properties. */
1438 void (*setup_gnu_properties) (struct bfd_link_info *);
1440 /* Encoding used for compact EH tables. */
1441 int (*compact_eh_encoding) (struct bfd_link_info *);
1443 /* Opcode representing no unwind. */
1444 int (*cant_unwind_opcode) (struct bfd_link_info *);
1446 /* This is non-zero if static TLS segments require a special alignment. */
1447 unsigned static_tls_alignment;
1449 /* Alignment for the PT_GNU_STACK segment. */
1450 unsigned stack_align;
1452 /* Flag bits to assign to a section of type SHT_STRTAB. */
1453 unsigned long elf_strtab_flags;
1455 /* This is TRUE if the linker should act like collect and gather
1456 global constructors and destructors by name. This is TRUE for
1457 MIPS ELF because the Irix 5 tools can not handle the .init
1459 unsigned collect : 1;
1461 /* This is TRUE if the linker should ignore changes to the type of a
1462 symbol. This is TRUE for MIPS ELF because some Irix 5 objects
1463 record undefined functions as STT_OBJECT although the definitions
1465 unsigned type_change_ok : 1;
1467 /* Whether the backend may use REL relocations. (Some backends use
1468 both REL and RELA relocations, and this flag is set for those
1470 unsigned may_use_rel_p : 1;
1472 /* Whether the backend may use RELA relocations. (Some backends use
1473 both REL and RELA relocations, and this flag is set for those
1475 unsigned may_use_rela_p : 1;
1477 /* Whether the default relocation type is RELA. If a backend with
1478 this flag set wants REL relocations for a particular section,
1479 it must note that explicitly. Similarly, if this flag is clear,
1480 and the backend wants RELA relocations for a particular
1482 unsigned default_use_rela_p : 1;
1484 /* True if PLT and copy relocations should be RELA by default. */
1485 unsigned rela_plts_and_copies_p : 1;
1487 /* Set if RELA relocations for a relocatable link can be handled by
1488 generic code. Backends that set this flag need do nothing in the
1489 backend relocate_section routine for relocatable linking. */
1490 unsigned rela_normal : 1;
1492 /* Set if DT_REL/DT_RELA/DT_RELSZ/DT_RELASZ should not include PLT
1494 unsigned dtrel_excludes_plt : 1;
1496 /* TRUE if addresses "naturally" sign extend. This is used when
1497 swapping in from Elf32 when BFD64. */
1498 unsigned sign_extend_vma : 1;
1500 unsigned want_got_plt : 1;
1501 unsigned plt_readonly : 1;
1502 unsigned want_plt_sym : 1;
1503 unsigned plt_not_loaded : 1;
1504 unsigned plt_alignment : 4;
1505 unsigned can_gc_sections : 1;
1506 unsigned can_refcount : 1;
1507 unsigned want_got_sym : 1;
1508 unsigned want_dynbss : 1;
1509 unsigned want_dynrelro : 1;
1511 /* Targets which do not support physical addressing often require
1512 that the p_paddr field in the section header to be set to zero.
1513 This field indicates whether this behavior is required. */
1514 unsigned want_p_paddr_set_to_zero : 1;
1516 /* Target has broken hardware and/or kernel that requires pages not
1517 to be mapped twice with different permissions. */
1518 unsigned no_page_alias : 1;
1520 /* True if an object file lacking a .note.GNU-stack section
1521 should be assumed to be requesting exec stack. At least one
1522 other file in the link needs to have a .note.GNU-stack section
1523 for a PT_GNU_STACK segment to be created. */
1524 unsigned default_execstack : 1;
1526 /* True if elf_section_data(sec)->this_hdr.contents is sec->rawsize
1527 in length rather than sec->size in length, if sec->rawsize is
1528 non-zero and smaller than sec->size. */
1529 unsigned caches_rawsize : 1;
1531 /* Address of protected data defined in the shared library may be
1532 external, i.e., due to copy relocation. */
1533 unsigned extern_protected_data : 1;
1536 /* Information about reloc sections associated with a bfd_elf_section_data
1538 struct bfd_elf_section_reloc_data
1540 /* The ELF header for the reloc section associated with this
1542 Elf_Internal_Shdr *hdr;
1543 /* The number of relocations currently assigned to HDR. */
1545 /* The ELF section number of the reloc section. Only used for an
1548 /* Used by the backend linker to store the symbol hash table entries
1549 associated with relocs against global symbols. */
1550 struct elf_link_hash_entry **hashes;
1553 /* Information stored for each BFD section in an ELF file. This
1554 structure is allocated by elf_new_section_hook. */
1556 struct bfd_elf_section_data
1558 /* The ELF header for this section. */
1559 Elf_Internal_Shdr this_hdr;
1561 /* INPUT_SECTION_FLAGS if specified in the linker script. */
1562 struct flag_info *section_flag_info;
1564 /* Information about the REL and RELA reloc sections associated
1565 with this section, if any. */
1566 struct bfd_elf_section_reloc_data rel, rela;
1568 /* The ELF section number of this section. */
1571 /* Used by the backend linker when generating a shared library to
1572 record the dynamic symbol index for a section symbol
1573 corresponding to this section. A value of 0 means that there is
1574 no dynamic symbol for this section. */
1577 /* A pointer to the linked-to section for SHF_LINK_ORDER. */
1578 asection *linked_to;
1580 /* A pointer to the swapped relocs. If the section uses REL relocs,
1581 rather than RELA, all the r_addend fields will be zero. This
1582 pointer may be NULL. It is used by the backend linker. */
1583 Elf_Internal_Rela *relocs;
1585 /* A pointer to a linked list tracking dynamic relocs copied for
1589 /* A pointer to the bfd section used for dynamic relocs. */
1593 /* Group name, if this section is a member of a group. */
1596 /* Group signature sym, if this is the SHT_GROUP section. */
1597 struct bfd_symbol *id;
1600 /* For a member of a group, points to the SHT_GROUP section.
1601 NULL for the SHT_GROUP section itself and non-group sections. */
1602 asection *sec_group;
1604 /* A linked list of member sections in the group. Circular when used by
1605 the linker. For the SHT_GROUP section, points at first member. */
1606 asection *next_in_group;
1608 /* The FDEs associated with this section. The u.fde.next_in_section
1609 field acts as a chain pointer. */
1610 struct eh_cie_fde *fde_list;
1612 /* Link from a text section to its .eh_frame_entry section. */
1613 asection *eh_frame_entry;
1615 /* A pointer used for various section optimizations. */
1619 #define elf_section_data(sec) ((struct bfd_elf_section_data*)(sec)->used_by_bfd)
1620 #define elf_linked_to_section(sec) (elf_section_data(sec)->linked_to)
1621 #define elf_section_type(sec) (elf_section_data(sec)->this_hdr.sh_type)
1622 #define elf_section_flags(sec) (elf_section_data(sec)->this_hdr.sh_flags)
1623 #define elf_group_name(sec) (elf_section_data(sec)->group.name)
1624 #define elf_group_id(sec) (elf_section_data(sec)->group.id)
1625 #define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group)
1626 #define elf_fde_list(sec) (elf_section_data(sec)->fde_list)
1627 #define elf_sec_group(sec) (elf_section_data(sec)->sec_group)
1628 #define elf_section_eh_frame_entry(sec) (elf_section_data(sec)->eh_frame_entry)
1630 #define xvec_get_elf_backend_data(xvec) \
1631 ((const struct elf_backend_data *) (xvec)->backend_data)
1633 #define get_elf_backend_data(abfd) \
1634 xvec_get_elf_backend_data ((abfd)->xvec)
1636 /* The least object attributes (within an attributes subsection) known
1637 for any target. Some code assumes that the value 0 is not used and
1638 the field for that attribute can instead be used as a marker to
1639 indicate that attributes have been initialized. */
1640 #define LEAST_KNOWN_OBJ_ATTRIBUTE 2
1642 /* The maximum number of known object attributes for any target. */
1643 #define NUM_KNOWN_OBJ_ATTRIBUTES 71
1645 /* The value of an object attribute. The type indicates whether the attribute
1646 holds and integer, a string, or both. It can also indicate that there can
1647 be no default (i.e. all values must be written to file, even zero). */
1649 typedef struct obj_attribute
1651 #define ATTR_TYPE_FLAG_INT_VAL (1 << 0)
1652 #define ATTR_TYPE_FLAG_STR_VAL (1 << 1)
1653 #define ATTR_TYPE_FLAG_NO_DEFAULT (1 << 2)
1655 #define ATTR_TYPE_HAS_INT_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_INT_VAL)
1656 #define ATTR_TYPE_HAS_STR_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_STR_VAL)
1657 #define ATTR_TYPE_HAS_NO_DEFAULT(TYPE) ((TYPE) & ATTR_TYPE_FLAG_NO_DEFAULT)
1664 typedef struct obj_attribute_list
1666 struct obj_attribute_list *next;
1669 } obj_attribute_list;
1671 /* Object attributes may either be defined by the processor ABI, index
1672 OBJ_ATTR_PROC in the *_obj_attributes arrays, or be GNU-specific
1673 (and possibly also processor-specific), index OBJ_ATTR_GNU. */
1674 #define OBJ_ATTR_PROC 0
1675 #define OBJ_ATTR_GNU 1
1676 #define OBJ_ATTR_FIRST OBJ_ATTR_PROC
1677 #define OBJ_ATTR_LAST OBJ_ATTR_GNU
1679 /* The following object attribute tags are taken as generic, for all
1680 targets and for "gnu" where there is no target standard. */
1687 Tag_compatibility = 32
1690 /* The following struct stores information about every SystemTap section
1691 found in the object file. */
1694 struct sdt_note *next;
1699 /* tdata information grabbed from an elf core file. */
1700 struct core_elf_obj_tdata
1709 /* Extra tdata information held for output ELF BFDs. */
1710 struct output_elf_obj_tdata
1712 struct elf_segment_map *seg_map;
1713 struct elf_strtab_hash *strtab_ptr;
1715 /* STT_SECTION symbols for each section */
1716 asymbol **section_syms;
1718 /* Used to determine if PT_GNU_EH_FRAME segment header should be
1720 asection *eh_frame_hdr;
1722 /* NT_GNU_BUILD_ID note type info. */
1725 bfd_boolean (*after_write_object_contents) (bfd *);
1730 /* Records the result of `get_program_header_size'. */
1731 bfd_size_type program_header_size;
1733 /* Used when laying out sections. */
1734 file_ptr next_file_pos;
1736 int num_section_syms;
1737 unsigned int shstrtab_section, strtab_section;
1739 /* Segment flags for the PT_GNU_STACK segment. */
1740 unsigned int stack_flags;
1742 /* This is set to TRUE if the object was created by the backend
1746 /* Used to determine if the e_flags field has been initialized */
1747 bfd_boolean flags_init;
1750 /* Indicate if the bfd contains symbols that have the STT_GNU_IFUNC
1751 symbol type or STB_GNU_UNIQUE binding. Used to set the osabi
1752 field in the ELF header structure. */
1753 enum elf_gnu_symbols
1755 elf_gnu_symbol_none = 0,
1756 elf_gnu_symbol_any = 1 << 0,
1757 elf_gnu_symbol_ifunc = (elf_gnu_symbol_any | 1 << 1),
1758 elf_gnu_symbol_unique = (elf_gnu_symbol_any | 1 << 2),
1759 elf_gnu_symbol_all = (elf_gnu_symbol_ifunc | elf_gnu_symbol_unique)
1762 typedef struct elf_section_list
1764 Elf_Internal_Shdr hdr;
1766 struct elf_section_list * next;
1769 /* Some private data is stashed away for future use using the tdata pointer
1770 in the bfd structure. */
1772 struct elf_obj_tdata
1774 Elf_Internal_Ehdr elf_header[1]; /* Actual data, but ref like ptr */
1775 Elf_Internal_Shdr **elf_sect_ptr;
1776 Elf_Internal_Phdr *phdr;
1777 Elf_Internal_Shdr symtab_hdr;
1778 Elf_Internal_Shdr shstrtab_hdr;
1779 Elf_Internal_Shdr strtab_hdr;
1780 Elf_Internal_Shdr dynsymtab_hdr;
1781 Elf_Internal_Shdr dynstrtab_hdr;
1782 Elf_Internal_Shdr dynversym_hdr;
1783 Elf_Internal_Shdr dynverref_hdr;
1784 Elf_Internal_Shdr dynverdef_hdr;
1785 elf_section_list * symtab_shndx_list;
1786 bfd_vma gp; /* The gp value */
1787 unsigned int gp_size; /* The gp size */
1788 unsigned int num_elf_sections; /* elf_sect_ptr size */
1790 /* A mapping from external symbols to entries in the linker hash
1791 table, used when linking. This is indexed by the symbol index
1792 minus the sh_info field of the symbol table header. */
1793 struct elf_link_hash_entry **sym_hashes;
1795 /* Track usage and final offsets of GOT entries for local symbols.
1796 This array is indexed by symbol index. Elements are used
1797 identically to "got" in struct elf_link_hash_entry. */
1800 bfd_signed_vma *refcounts;
1802 struct got_entry **ents;
1805 /* The linker ELF emulation code needs to let the backend ELF linker
1806 know what filename should be used for a dynamic object if the
1807 dynamic object is found using a search. The emulation code then
1808 sometimes needs to know what name was actually used. Until the
1809 file has been added to the linker symbol table, this field holds
1810 the name the linker wants. After it has been added, it holds the
1811 name actually used, which will be the DT_SONAME entry if there is
1813 const char *dt_name;
1815 /* The linker emulation needs to know what audit libs
1816 are used by a dynamic object. */
1817 const char *dt_audit;
1819 /* Used by find_nearest_line entry point. */
1822 /* A place to stash dwarf1 info for this bfd. */
1823 struct dwarf1_debug *dwarf1_find_line_info;
1825 /* A place to stash dwarf2 info for this bfd. */
1826 void *dwarf2_find_line_info;
1828 /* Stash away info for yet another find line/function variant. */
1829 void *elf_find_function_cache;
1831 /* Number of symbol version definitions we are about to emit. */
1832 unsigned int cverdefs;
1834 /* Number of symbol version references we are about to emit. */
1835 unsigned int cverrefs;
1837 /* Symbol version definitions in external objects. */
1838 Elf_Internal_Verdef *verdef;
1840 /* Symbol version references to external objects. */
1841 Elf_Internal_Verneed *verref;
1843 /* A pointer to the .eh_frame section. */
1844 asection *eh_frame_section;
1846 /* Symbol buffer. */
1849 /* List of GNU properties. Will be updated by setup_gnu_properties
1850 after all input GNU properties are merged for output. */
1851 elf_property_list *properties;
1853 obj_attribute known_obj_attributes[2][NUM_KNOWN_OBJ_ATTRIBUTES];
1854 obj_attribute_list *other_obj_attributes[2];
1856 /* Linked-list containing information about every Systemtap section
1857 found in the object file. Each section corresponds to one entry
1859 struct sdt_note *sdt_note_head;
1861 Elf_Internal_Shdr **group_sect_ptr;
1864 unsigned int symtab_section, dynsymtab_section;
1865 unsigned int dynversym_section, dynverdef_section, dynverref_section;
1867 /* An identifier used to distinguish different target
1868 specific extensions to this structure. */
1869 enum elf_target_id object_id;
1871 /* Whether a dyanmic object was specified normally on the linker
1872 command line, or was specified when --as-needed was in effect,
1873 or was found via a DT_NEEDED entry. */
1874 enum dynamic_lib_link_class dyn_lib_class;
1876 /* Irix 5 often screws up the symbol table, sorting local symbols
1877 after global symbols. This flag is set if the symbol table in
1878 this BFD appears to be screwed up. If it is, we ignore the
1879 sh_info field in the symbol table header, and always read all the
1881 bfd_boolean bad_symtab;
1883 enum elf_gnu_symbols has_gnu_symbols;
1885 /* Information grabbed from an elf core file. */
1886 struct core_elf_obj_tdata *core;
1888 /* More information held for output ELF BFDs. */
1889 struct output_elf_obj_tdata *o;
1892 #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
1894 #define elf_object_id(bfd) (elf_tdata(bfd) -> object_id)
1895 #define elf_program_header_size(bfd) (elf_tdata(bfd) -> o->program_header_size)
1896 #define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header)
1897 #define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr)
1898 #define elf_numsections(bfd) (elf_tdata(bfd) -> num_elf_sections)
1899 #define elf_seg_map(bfd) (elf_tdata(bfd) -> o->seg_map)
1900 #define elf_next_file_pos(bfd) (elf_tdata(bfd) -> o->next_file_pos)
1901 #define elf_eh_frame_hdr(bfd) (elf_tdata(bfd) -> o->eh_frame_hdr)
1902 #define elf_linker(bfd) (elf_tdata(bfd) -> o->linker)
1903 #define elf_stack_flags(bfd) (elf_tdata(bfd) -> o->stack_flags)
1904 #define elf_shstrtab(bfd) (elf_tdata(bfd) -> o->strtab_ptr)
1905 #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section)
1906 #define elf_symtab_shndx_list(bfd) (elf_tdata(bfd) -> symtab_shndx_list)
1907 #define elf_strtab_sec(bfd) (elf_tdata(bfd) -> o->strtab_section)
1908 #define elf_shstrtab_sec(bfd) (elf_tdata(bfd) -> o->shstrtab_section)
1909 #define elf_symtab_hdr(bfd) (elf_tdata(bfd) -> symtab_hdr)
1910 #define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section)
1911 #define elf_dynversym(bfd) (elf_tdata(bfd) -> dynversym_section)
1912 #define elf_dynverdef(bfd) (elf_tdata(bfd) -> dynverdef_section)
1913 #define elf_dynverref(bfd) (elf_tdata(bfd) -> dynverref_section)
1914 #define elf_eh_frame_section(bfd) \
1915 (elf_tdata(bfd) -> eh_frame_section)
1916 #define elf_section_syms(bfd) (elf_tdata(bfd) -> o->section_syms)
1917 #define elf_num_section_syms(bfd) (elf_tdata(bfd) -> o->num_section_syms)
1918 #define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
1919 #define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
1920 #define elf_gp(bfd) (elf_tdata(bfd) -> gp)
1921 #define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size)
1922 #define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes)
1923 #define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts)
1924 #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets)
1925 #define elf_local_got_ents(bfd) (elf_tdata(bfd) -> local_got.ents)
1926 #define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name)
1927 #define elf_dt_audit(bfd) (elf_tdata(bfd) -> dt_audit)
1928 #define elf_dyn_lib_class(bfd) (elf_tdata(bfd) -> dyn_lib_class)
1929 #define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab)
1930 #define elf_flags_init(bfd) (elf_tdata(bfd) -> o->flags_init)
1931 #define elf_known_obj_attributes(bfd) (elf_tdata (bfd) -> known_obj_attributes)
1932 #define elf_other_obj_attributes(bfd) (elf_tdata (bfd) -> other_obj_attributes)
1933 #define elf_known_obj_attributes_proc(bfd) \
1934 (elf_known_obj_attributes (bfd) [OBJ_ATTR_PROC])
1935 #define elf_other_obj_attributes_proc(bfd) \
1936 (elf_other_obj_attributes (bfd) [OBJ_ATTR_PROC])
1937 #define elf_properties(bfd) (elf_tdata (bfd) -> properties)
1939 extern void _bfd_elf_swap_verdef_in
1940 (bfd *, const Elf_External_Verdef *, Elf_Internal_Verdef *);
1941 extern void _bfd_elf_swap_verdef_out
1942 (bfd *, const Elf_Internal_Verdef *, Elf_External_Verdef *);
1943 extern void _bfd_elf_swap_verdaux_in
1944 (bfd *, const Elf_External_Verdaux *, Elf_Internal_Verdaux *);
1945 extern void _bfd_elf_swap_verdaux_out
1946 (bfd *, const Elf_Internal_Verdaux *, Elf_External_Verdaux *);
1947 extern void _bfd_elf_swap_verneed_in
1948 (bfd *, const Elf_External_Verneed *, Elf_Internal_Verneed *);
1949 extern void _bfd_elf_swap_verneed_out
1950 (bfd *, const Elf_Internal_Verneed *, Elf_External_Verneed *);
1951 extern void _bfd_elf_swap_vernaux_in
1952 (bfd *, const Elf_External_Vernaux *, Elf_Internal_Vernaux *);
1953 extern void _bfd_elf_swap_vernaux_out
1954 (bfd *, const Elf_Internal_Vernaux *, Elf_External_Vernaux *);
1955 extern void _bfd_elf_swap_versym_in
1956 (bfd *, const Elf_External_Versym *, Elf_Internal_Versym *);
1957 extern void _bfd_elf_swap_versym_out
1958 (bfd *, const Elf_Internal_Versym *, Elf_External_Versym *);
1960 extern unsigned int _bfd_elf_section_from_bfd_section
1961 (bfd *, asection *);
1962 extern char *bfd_elf_string_from_elf_section
1963 (bfd *, unsigned, unsigned);
1964 extern Elf_Internal_Sym *bfd_elf_get_elf_syms
1965 (bfd *, Elf_Internal_Shdr *, size_t, size_t, Elf_Internal_Sym *, void *,
1966 Elf_External_Sym_Shndx *);
1967 extern const char *bfd_elf_sym_name
1968 (bfd *, Elf_Internal_Shdr *, Elf_Internal_Sym *, asection *);
1970 extern bfd_boolean _bfd_elf_copy_private_bfd_data
1972 extern bfd_boolean _bfd_elf_print_private_bfd_data
1974 const char * _bfd_elf_get_symbol_version_string
1975 (bfd *, asymbol *, bfd_boolean *);
1976 extern void bfd_elf_print_symbol
1977 (bfd *, void *, asymbol *, bfd_print_symbol_type);
1979 extern unsigned int _bfd_elf_eh_frame_address_size
1980 (bfd *, asection *);
1981 extern bfd_byte _bfd_elf_encode_eh_address
1982 (bfd *abfd, struct bfd_link_info *info, asection *osec, bfd_vma offset,
1983 asection *loc_sec, bfd_vma loc_offset, bfd_vma *encoded);
1984 extern bfd_boolean _bfd_elf_can_make_relative
1985 (bfd *input_bfd, struct bfd_link_info *info, asection *eh_frame_section);
1987 extern enum elf_reloc_type_class _bfd_elf_reloc_type_class
1988 (const struct bfd_link_info *, const asection *,
1989 const Elf_Internal_Rela *);
1990 extern bfd_vma _bfd_elf_rela_local_sym
1991 (bfd *, Elf_Internal_Sym *, asection **, Elf_Internal_Rela *);
1992 extern bfd_vma _bfd_elf_rel_local_sym
1993 (bfd *, Elf_Internal_Sym *, asection **, bfd_vma);
1994 extern bfd_vma _bfd_elf_section_offset
1995 (bfd *, struct bfd_link_info *, asection *, bfd_vma);
1997 extern unsigned long bfd_elf_hash
1999 extern unsigned long bfd_elf_gnu_hash
2002 extern bfd_reloc_status_type bfd_elf_generic_reloc
2003 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
2004 extern bfd_boolean bfd_elf_allocate_object
2005 (bfd *, size_t, enum elf_target_id);
2006 extern bfd_boolean bfd_elf_make_object
2008 extern bfd_boolean bfd_elf_mkcorefile
2010 extern bfd_boolean _bfd_elf_make_section_from_shdr
2011 (bfd *, Elf_Internal_Shdr *, const char *, int);
2012 extern bfd_boolean _bfd_elf_make_section_from_phdr
2013 (bfd *, Elf_Internal_Phdr *, int, const char *);
2014 extern struct bfd_hash_entry *_bfd_elf_link_hash_newfunc
2015 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
2016 extern struct bfd_link_hash_table *_bfd_elf_link_hash_table_create
2018 extern void _bfd_elf_link_hash_table_free
2020 extern void _bfd_elf_link_hash_copy_indirect
2021 (struct bfd_link_info *, struct elf_link_hash_entry *,
2022 struct elf_link_hash_entry *);
2023 extern void _bfd_elf_link_hash_hide_symbol
2024 (struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean);
2025 extern bfd_boolean _bfd_elf_link_hash_fixup_symbol
2026 (struct bfd_link_info *, struct elf_link_hash_entry *);
2027 extern bfd_boolean _bfd_elf_link_hash_table_init
2028 (struct elf_link_hash_table *, bfd *,
2029 struct bfd_hash_entry *(*)
2030 (struct bfd_hash_entry *, struct bfd_hash_table *, const char *),
2031 unsigned int, enum elf_target_id);
2032 extern bfd_boolean _bfd_elf_slurp_version_tables
2033 (bfd *, bfd_boolean);
2034 extern bfd_boolean _bfd_elf_merge_sections
2035 (bfd *, struct bfd_link_info *);
2036 extern bfd_boolean _bfd_elf_match_sections_by_type
2037 (bfd *, const asection *, bfd *, const asection *);
2038 extern bfd_boolean bfd_elf_is_group_section
2039 (bfd *, const struct bfd_section *);
2040 extern bfd_boolean _bfd_elf_section_already_linked
2041 (bfd *, asection *, struct bfd_link_info *);
2042 extern void bfd_elf_set_group_contents
2043 (bfd *, asection *, void *);
2044 extern unsigned int _bfd_elf_filter_global_symbols
2045 (bfd *, struct bfd_link_info *, asymbol **, long);
2046 extern asection *_bfd_elf_check_kept_section
2047 (asection *, struct bfd_link_info *);
2048 #define _bfd_elf_link_just_syms _bfd_generic_link_just_syms
2049 extern void _bfd_elf_copy_link_hash_symbol_type
2050 (bfd *, struct bfd_link_hash_entry *, struct bfd_link_hash_entry *);
2051 extern bfd_boolean _bfd_elf_size_group_sections
2052 (struct bfd_link_info *);
2053 extern bfd_boolean _bfd_elf_fixup_group_sections
2054 (bfd *, asection *);
2055 extern bfd_boolean _bfd_elf_copy_private_header_data
2057 extern bfd_boolean _bfd_elf_copy_private_symbol_data
2058 (bfd *, asymbol *, bfd *, asymbol *);
2059 #define _bfd_generic_init_private_section_data \
2060 _bfd_elf_init_private_section_data
2061 extern bfd_boolean _bfd_elf_init_private_section_data
2062 (bfd *, asection *, bfd *, asection *, struct bfd_link_info *);
2063 extern bfd_boolean _bfd_elf_copy_private_section_data
2064 (bfd *, asection *, bfd *, asection *);
2065 extern bfd_boolean _bfd_elf_write_object_contents
2067 extern bfd_boolean _bfd_elf_write_corefile_contents
2069 extern bfd_boolean _bfd_elf_set_section_contents
2070 (bfd *, sec_ptr, const void *, file_ptr, bfd_size_type);
2071 extern long _bfd_elf_get_symtab_upper_bound
2073 extern long _bfd_elf_canonicalize_symtab
2074 (bfd *, asymbol **);
2075 extern long _bfd_elf_get_dynamic_symtab_upper_bound
2077 extern long _bfd_elf_canonicalize_dynamic_symtab
2078 (bfd *, asymbol **);
2079 extern long _bfd_elf_get_synthetic_symtab
2080 (bfd *, long, asymbol **, long, asymbol **, asymbol **);
2081 extern long _bfd_elf_get_reloc_upper_bound
2083 extern long _bfd_elf_canonicalize_reloc
2084 (bfd *, sec_ptr, arelent **, asymbol **);
2085 extern asection * _bfd_elf_get_dynamic_reloc_section
2086 (bfd *, asection *, bfd_boolean);
2087 extern asection * _bfd_elf_make_dynamic_reloc_section
2088 (asection *, bfd *, unsigned int, bfd *, bfd_boolean);
2089 extern long _bfd_elf_get_dynamic_reloc_upper_bound
2091 extern long _bfd_elf_canonicalize_dynamic_reloc
2092 (bfd *, arelent **, asymbol **);
2093 extern asymbol *_bfd_elf_make_empty_symbol
2095 extern void _bfd_elf_get_symbol_info
2096 (bfd *, asymbol *, symbol_info *);
2097 extern bfd_boolean _bfd_elf_is_local_label_name
2098 (bfd *, const char *);
2099 extern alent *_bfd_elf_get_lineno
2101 extern bfd_boolean _bfd_elf_set_arch_mach
2102 (bfd *, enum bfd_architecture, unsigned long);
2103 extern bfd_boolean _bfd_elf_find_nearest_line
2104 (bfd *, asymbol **, asection *, bfd_vma,
2105 const char **, const char **, unsigned int *, unsigned int *);
2106 extern bfd_boolean _bfd_elf_find_line
2107 (bfd *, asymbol **, asymbol *, const char **, unsigned int *);
2108 extern bfd_boolean _bfd_elf_find_inliner_info
2109 (bfd *, const char **, const char **, unsigned int *);
2110 extern asymbol *_bfd_elf_find_function
2111 (bfd *, asymbol **, asection *, bfd_vma, const char **, const char **);
2112 #define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols
2113 #define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
2114 extern int _bfd_elf_sizeof_headers
2115 (bfd *, struct bfd_link_info *);
2116 extern bfd_boolean _bfd_elf_new_section_hook
2117 (bfd *, asection *);
2118 extern const struct bfd_elf_special_section *_bfd_elf_get_special_section
2119 (const char *, const struct bfd_elf_special_section *, unsigned int);
2120 extern const struct bfd_elf_special_section *_bfd_elf_get_sec_type_attr
2121 (bfd *, asection *);
2123 /* If the target doesn't have reloc handling written yet: */
2124 extern void _bfd_elf_no_info_to_howto
2125 (bfd *, arelent *, Elf_Internal_Rela *);
2127 extern bfd_boolean bfd_section_from_shdr
2128 (bfd *, unsigned int shindex);
2129 extern bfd_boolean bfd_section_from_phdr
2130 (bfd *, Elf_Internal_Phdr *, int);
2132 extern int _bfd_elf_symbol_from_bfd_symbol
2133 (bfd *, asymbol **);
2135 extern Elf_Internal_Sym *bfd_sym_from_r_symndx
2136 (struct sym_cache *, bfd *, unsigned long);
2137 extern asection *bfd_section_from_elf_index
2138 (bfd *, unsigned int);
2140 extern struct elf_strtab_hash * _bfd_elf_strtab_init
2142 extern void _bfd_elf_strtab_free
2143 (struct elf_strtab_hash *);
2144 extern size_t _bfd_elf_strtab_add
2145 (struct elf_strtab_hash *, const char *, bfd_boolean);
2146 extern void _bfd_elf_strtab_addref
2147 (struct elf_strtab_hash *, size_t);
2148 extern void _bfd_elf_strtab_delref
2149 (struct elf_strtab_hash *, size_t);
2150 extern unsigned int _bfd_elf_strtab_refcount
2151 (struct elf_strtab_hash *, size_t);
2152 extern void _bfd_elf_strtab_clear_all_refs
2153 (struct elf_strtab_hash *);
2154 extern void *_bfd_elf_strtab_save
2155 (struct elf_strtab_hash *);
2156 extern void _bfd_elf_strtab_restore
2157 (struct elf_strtab_hash *, void *);
2158 extern bfd_size_type _bfd_elf_strtab_size
2159 (struct elf_strtab_hash *);
2160 extern bfd_size_type _bfd_elf_strtab_offset
2161 (struct elf_strtab_hash *, size_t);
2162 extern bfd_boolean _bfd_elf_strtab_emit
2163 (bfd *, struct elf_strtab_hash *);
2164 extern void _bfd_elf_strtab_finalize
2165 (struct elf_strtab_hash *);
2167 extern bfd_boolean bfd_elf_parse_eh_frame_entries
2168 (bfd *, struct bfd_link_info *);
2169 extern bfd_boolean _bfd_elf_parse_eh_frame_entry
2170 (struct bfd_link_info *, asection *, struct elf_reloc_cookie *);
2171 extern void _bfd_elf_parse_eh_frame
2172 (bfd *, struct bfd_link_info *, asection *, struct elf_reloc_cookie *);
2173 extern bfd_boolean _bfd_elf_end_eh_frame_parsing
2174 (struct bfd_link_info *info);
2176 extern bfd_boolean _bfd_elf_discard_section_eh_frame
2177 (bfd *, struct bfd_link_info *, asection *,
2178 bfd_boolean (*) (bfd_vma, void *), struct elf_reloc_cookie *);
2179 extern bfd_boolean _bfd_elf_discard_section_eh_frame_hdr
2180 (bfd *, struct bfd_link_info *);
2181 extern bfd_vma _bfd_elf_eh_frame_section_offset
2182 (bfd *, struct bfd_link_info *, asection *, bfd_vma);
2183 extern bfd_boolean _bfd_elf_write_section_eh_frame
2184 (bfd *, struct bfd_link_info *, asection *, bfd_byte *);
2185 bfd_boolean _bfd_elf_write_section_eh_frame_entry
2186 (bfd *, struct bfd_link_info *, asection *, bfd_byte *);
2187 extern bfd_boolean _bfd_elf_fixup_eh_frame_hdr (struct bfd_link_info *);
2188 extern bfd_boolean _bfd_elf_write_section_eh_frame_hdr
2189 (bfd *, struct bfd_link_info *);
2190 extern bfd_boolean _bfd_elf_eh_frame_present
2191 (struct bfd_link_info *);
2192 extern bfd_boolean _bfd_elf_eh_frame_entry_present
2193 (struct bfd_link_info *);
2194 extern bfd_boolean _bfd_elf_maybe_strip_eh_frame_hdr
2195 (struct bfd_link_info *);
2197 extern bfd_boolean _bfd_elf_hash_symbol (struct elf_link_hash_entry *);
2199 extern long _bfd_elf_link_lookup_local_dynindx
2200 (struct bfd_link_info *, bfd *, long);
2201 extern bfd_boolean _bfd_elf_compute_section_file_positions
2202 (bfd *, struct bfd_link_info *);
2203 extern file_ptr _bfd_elf_assign_file_position_for_section
2204 (Elf_Internal_Shdr *, file_ptr, bfd_boolean);
2206 extern bfd_boolean _bfd_elf_validate_reloc
2209 extern bfd_boolean _bfd_elf_link_create_dynamic_sections
2210 (bfd *, struct bfd_link_info *);
2211 extern bfd_boolean _bfd_elf_link_omit_section_dynsym
2212 (bfd *, struct bfd_link_info *, asection *);
2213 extern bfd_boolean _bfd_elf_create_dynamic_sections
2214 (bfd *, struct bfd_link_info *);
2215 extern bfd_boolean _bfd_elf_create_got_section
2216 (bfd *, struct bfd_link_info *);
2217 extern asection *_bfd_elf_section_for_symbol
2218 (struct elf_reloc_cookie *, unsigned long, bfd_boolean);
2219 extern struct elf_link_hash_entry *_bfd_elf_define_linkage_sym
2220 (bfd *, struct bfd_link_info *, asection *, const char *);
2221 extern void _bfd_elf_init_1_index_section
2222 (bfd *, struct bfd_link_info *);
2223 extern void _bfd_elf_init_2_index_sections
2224 (bfd *, struct bfd_link_info *);
2226 extern bfd_boolean _bfd_elfcore_make_pseudosection
2227 (bfd *, char *, size_t, ufile_ptr);
2228 extern char *_bfd_elfcore_strndup
2229 (bfd *, char *, size_t);
2231 extern Elf_Internal_Rela *_bfd_elf_link_read_relocs
2232 (bfd *, asection *, void *, Elf_Internal_Rela *, bfd_boolean);
2234 extern bfd_boolean _bfd_elf_link_output_relocs
2235 (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *,
2236 struct elf_link_hash_entry **);
2238 extern bfd_boolean _bfd_elf_adjust_dynamic_copy
2239 (struct bfd_link_info *, struct elf_link_hash_entry *, asection *);
2241 extern bfd_boolean _bfd_elf_dynamic_symbol_p
2242 (struct elf_link_hash_entry *, struct bfd_link_info *, bfd_boolean);
2244 extern bfd_boolean _bfd_elf_symbol_refs_local_p
2245 (struct elf_link_hash_entry *, struct bfd_link_info *, bfd_boolean);
2247 extern bfd_reloc_status_type bfd_elf_perform_complex_relocation
2248 (bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, bfd_vma);
2250 extern bfd_boolean _bfd_elf_setup_sections
2253 extern void _bfd_elf_post_process_headers (bfd * , struct bfd_link_info *);
2255 extern const bfd_target *bfd_elf32_object_p
2257 extern const bfd_target *bfd_elf32_core_file_p
2259 extern char *bfd_elf32_core_file_failing_command
2261 extern int bfd_elf32_core_file_failing_signal
2263 extern bfd_boolean bfd_elf32_core_file_matches_executable_p
2265 extern int bfd_elf32_core_file_pid
2268 extern bfd_boolean bfd_elf32_swap_symbol_in
2269 (bfd *, const void *, const void *, Elf_Internal_Sym *);
2270 extern void bfd_elf32_swap_symbol_out
2271 (bfd *, const Elf_Internal_Sym *, void *, void *);
2272 extern void bfd_elf32_swap_reloc_in
2273 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
2274 extern void bfd_elf32_swap_reloc_out
2275 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
2276 extern void bfd_elf32_swap_reloca_in
2277 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
2278 extern void bfd_elf32_swap_reloca_out
2279 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
2280 extern void bfd_elf32_swap_phdr_in
2281 (bfd *, const Elf32_External_Phdr *, Elf_Internal_Phdr *);
2282 extern void bfd_elf32_swap_phdr_out
2283 (bfd *, const Elf_Internal_Phdr *, Elf32_External_Phdr *);
2284 extern void bfd_elf32_swap_dyn_in
2285 (bfd *, const void *, Elf_Internal_Dyn *);
2286 extern void bfd_elf32_swap_dyn_out
2287 (bfd *, const Elf_Internal_Dyn *, void *);
2288 extern long bfd_elf32_slurp_symbol_table
2289 (bfd *, asymbol **, bfd_boolean);
2290 extern bfd_boolean bfd_elf32_write_shdrs_and_ehdr
2292 extern int bfd_elf32_write_out_phdrs
2293 (bfd *, const Elf_Internal_Phdr *, unsigned int);
2294 extern bfd_boolean bfd_elf32_checksum_contents
2295 (bfd * , void (*) (const void *, size_t, void *), void *);
2296 extern void bfd_elf32_write_relocs
2297 (bfd *, asection *, void *);
2298 extern bfd_boolean bfd_elf32_slurp_reloc_table
2299 (bfd *, asection *, asymbol **, bfd_boolean);
2301 extern const bfd_target *bfd_elf64_object_p
2303 extern const bfd_target *bfd_elf64_core_file_p
2305 extern char *bfd_elf64_core_file_failing_command
2307 extern int bfd_elf64_core_file_failing_signal
2309 extern bfd_boolean bfd_elf64_core_file_matches_executable_p
2311 extern int bfd_elf64_core_file_pid
2314 extern bfd_boolean bfd_elf64_swap_symbol_in
2315 (bfd *, const void *, const void *, Elf_Internal_Sym *);
2316 extern void bfd_elf64_swap_symbol_out
2317 (bfd *, const Elf_Internal_Sym *, void *, void *);
2318 extern void bfd_elf64_swap_reloc_in
2319 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
2320 extern void bfd_elf64_swap_reloc_out
2321 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
2322 extern void bfd_elf64_swap_reloca_in
2323 (bfd *, const bfd_byte *, Elf_Internal_Rela *);
2324 extern void bfd_elf64_swap_reloca_out
2325 (bfd *, const Elf_Internal_Rela *, bfd_byte *);
2326 extern void bfd_elf64_swap_phdr_in
2327 (bfd *, const Elf64_External_Phdr *, Elf_Internal_Phdr *);
2328 extern void bfd_elf64_swap_phdr_out
2329 (bfd *, const Elf_Internal_Phdr *, Elf64_External_Phdr *);
2330 extern void bfd_elf64_swap_dyn_in
2331 (bfd *, const void *, Elf_Internal_Dyn *);
2332 extern void bfd_elf64_swap_dyn_out
2333 (bfd *, const Elf_Internal_Dyn *, void *);
2334 extern long bfd_elf64_slurp_symbol_table
2335 (bfd *, asymbol **, bfd_boolean);
2336 extern bfd_boolean bfd_elf64_write_shdrs_and_ehdr
2338 extern int bfd_elf64_write_out_phdrs
2339 (bfd *, const Elf_Internal_Phdr *, unsigned int);
2340 extern bfd_boolean bfd_elf64_checksum_contents
2341 (bfd * , void (*) (const void *, size_t, void *), void *);
2342 extern void bfd_elf64_write_relocs
2343 (bfd *, asection *, void *);
2344 extern bfd_boolean bfd_elf64_slurp_reloc_table
2345 (bfd *, asection *, asymbol **, bfd_boolean);
2347 extern bfd_boolean _bfd_elf_default_relocs_compatible
2348 (const bfd_target *, const bfd_target *);
2350 extern bfd_boolean _bfd_elf_relocs_compatible
2351 (const bfd_target *, const bfd_target *);
2352 extern bfd_boolean _bfd_elf_notice_as_needed
2353 (bfd *, struct bfd_link_info *, enum notice_asneeded_action);
2355 extern struct elf_link_hash_entry *_bfd_elf_archive_symbol_lookup
2356 (bfd *, struct bfd_link_info *, const char *);
2357 extern bfd_boolean bfd_elf_link_add_symbols
2358 (bfd *, struct bfd_link_info *);
2359 extern bfd_boolean _bfd_elf_add_dynamic_entry
2360 (struct bfd_link_info *, bfd_vma, bfd_vma);
2361 extern bfd_boolean _bfd_elf_link_check_relocs
2362 (bfd *, struct bfd_link_info *);
2364 extern bfd_boolean bfd_elf_link_record_dynamic_symbol
2365 (struct bfd_link_info *, struct elf_link_hash_entry *);
2367 extern int bfd_elf_link_record_local_dynamic_symbol
2368 (struct bfd_link_info *, bfd *, long);
2370 extern bfd_boolean _bfd_elf_close_and_cleanup
2373 extern bfd_boolean _bfd_elf_common_definition
2374 (Elf_Internal_Sym *);
2376 extern unsigned int _bfd_elf_common_section_index
2379 extern asection *_bfd_elf_common_section
2382 extern bfd_vma _bfd_elf_default_got_elt_size
2383 (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, bfd *,
2386 extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn
2387 (bfd *, arelent *, struct bfd_symbol *, void *,
2388 asection *, bfd *, char **);
2390 extern bfd_boolean bfd_elf_final_link
2391 (bfd *, struct bfd_link_info *);
2393 extern void _bfd_elf_gc_keep
2394 (struct bfd_link_info *info);
2396 extern bfd_boolean bfd_elf_gc_mark_dynamic_ref_symbol
2397 (struct elf_link_hash_entry *h, void *inf);
2399 extern bfd_boolean bfd_elf_gc_sections
2400 (bfd *, struct bfd_link_info *);
2402 extern bfd_boolean bfd_elf_gc_record_vtinherit
2403 (bfd *, asection *, struct elf_link_hash_entry *, bfd_vma);
2405 extern bfd_boolean bfd_elf_gc_record_vtentry
2406 (bfd *, asection *, struct elf_link_hash_entry *, bfd_vma);
2408 extern asection *_bfd_elf_gc_mark_hook
2409 (asection *, struct bfd_link_info *, Elf_Internal_Rela *,
2410 struct elf_link_hash_entry *, Elf_Internal_Sym *);
2412 extern asection *_bfd_elf_gc_mark_rsec
2413 (struct bfd_link_info *, asection *, elf_gc_mark_hook_fn,
2414 struct elf_reloc_cookie *, bfd_boolean *);
2416 extern bfd_boolean _bfd_elf_gc_mark_reloc
2417 (struct bfd_link_info *, asection *, elf_gc_mark_hook_fn,
2418 struct elf_reloc_cookie *);
2420 extern bfd_boolean _bfd_elf_gc_mark_fdes
2421 (struct bfd_link_info *, asection *, asection *, elf_gc_mark_hook_fn,
2422 struct elf_reloc_cookie *);
2424 extern bfd_boolean _bfd_elf_gc_mark
2425 (struct bfd_link_info *, asection *, elf_gc_mark_hook_fn);
2427 extern bfd_boolean _bfd_elf_gc_mark_extra_sections
2428 (struct bfd_link_info *, elf_gc_mark_hook_fn);
2430 extern bfd_boolean bfd_elf_gc_common_finalize_got_offsets
2431 (bfd *, struct bfd_link_info *);
2433 extern bfd_boolean bfd_elf_gc_common_final_link
2434 (bfd *, struct bfd_link_info *);
2436 extern asection *_bfd_elf_is_start_stop
2437 (const struct bfd_link_info *, struct elf_link_hash_entry *);
2439 extern bfd_boolean bfd_elf_reloc_symbol_deleted_p
2442 extern struct elf_segment_map * _bfd_elf_make_dynamic_segment
2443 (bfd *, asection *);
2445 extern bfd_boolean _bfd_elf_map_sections_to_segments
2446 (bfd *, struct bfd_link_info *);
2448 extern bfd_boolean _bfd_elf_is_function_type (unsigned int);
2450 extern bfd_size_type _bfd_elf_maybe_function_sym (const asymbol *, asection *,
2453 extern asection *_bfd_elf_plt_get_reloc_section (bfd *, const char *);
2455 extern int bfd_elf_get_default_section_type (flagword);
2457 extern bfd_boolean bfd_elf_lookup_section_flags
2458 (struct bfd_link_info *, struct flag_info *, asection *);
2460 extern Elf_Internal_Phdr * _bfd_elf_find_segment_containing_section
2461 (bfd * abfd, asection * section);
2463 /* PowerPC @tls opcode transform/validate. */
2464 extern unsigned int _bfd_elf_ppc_at_tls_transform
2465 (unsigned int, unsigned int);
2466 /* PowerPC @tprel opcode transform/validate. */
2467 extern unsigned int _bfd_elf_ppc_at_tprel_transform
2468 (unsigned int, unsigned int);
2469 /* PowerPC elf_object_p tweak. */
2470 extern bfd_boolean _bfd_elf_ppc_set_arch (bfd *);
2471 /* PowerPC .gnu.attributes handling common to both 32-bit and 64-bit. */
2472 extern void _bfd_elf_ppc_merge_fp_attributes (bfd *, struct bfd_link_info *);
2474 /* Exported interface for writing elf corefile notes. */
2475 extern char *elfcore_write_note
2476 (bfd *, char *, int *, const char *, int, const void *, int);
2477 extern char *elfcore_write_prpsinfo
2478 (bfd *, char *, int *, const char *, const char *);
2479 extern char *elfcore_write_prstatus
2480 (bfd *, char *, int *, long, int, const void *);
2481 extern char * elfcore_write_pstatus
2482 (bfd *, char *, int *, long, int, const void *);
2483 extern char *elfcore_write_prfpreg
2484 (bfd *, char *, int *, const void *, int);
2485 extern char *elfcore_write_prxfpreg
2486 (bfd *, char *, int *, const void *, int);
2487 extern char *elfcore_write_xstatereg
2488 (bfd *, char *, int *, const void *, int);
2489 extern char *elfcore_write_ppc_vmx
2490 (bfd *, char *, int *, const void *, int);
2491 extern char *elfcore_write_ppc_vsx
2492 (bfd *, char *, int *, const void *, int);
2493 extern char *elfcore_write_s390_timer
2494 (bfd *, char *, int *, const void *, int);
2495 extern char *elfcore_write_s390_todcmp
2496 (bfd *, char *, int *, const void *, int);
2497 extern char *elfcore_write_s390_todpreg
2498 (bfd *, char *, int *, const void *, int);
2499 extern char *elfcore_write_s390_ctrs
2500 (bfd *, char *, int *, const void *, int);
2501 extern char *elfcore_write_s390_prefix
2502 (bfd *, char *, int *, const void *, int);
2503 extern char *elfcore_write_s390_last_break
2504 (bfd *, char *, int *, const void *, int);
2505 extern char *elfcore_write_s390_system_call
2506 (bfd *, char *, int *, const void *, int);
2507 extern char *elfcore_write_s390_tdb
2508 (bfd *, char *, int *, const void *, int);
2509 extern char *elfcore_write_s390_vxrs_low
2510 (bfd *, char *, int *, const void *, int);
2511 extern char *elfcore_write_s390_vxrs_high
2512 (bfd *, char *, int *, const void *, int);
2513 extern char *elfcore_write_arm_vfp
2514 (bfd *, char *, int *, const void *, int);
2515 extern char *elfcore_write_aarch_tls
2516 (bfd *, char *, int *, const void *, int);
2517 extern char *elfcore_write_aarch_hw_break
2518 (bfd *, char *, int *, const void *, int);
2519 extern char *elfcore_write_aarch_hw_watch
2520 (bfd *, char *, int *, const void *, int);
2521 extern char *elfcore_write_lwpstatus
2522 (bfd *, char *, int *, long, int, const void *);
2523 extern char *elfcore_write_register_note
2524 (bfd *, char *, int *, const char *, const void *, int);
2526 /* Internal structure which holds information to be included in the
2527 PRPSINFO section of Linux core files.
2529 This is an "internal" structure in the sense that it should be used
2530 to pass information to BFD (via the `elfcore_write_linux_prpsinfo'
2531 function), so things like endianess shouldn't be an issue. This
2532 structure will eventually be converted in one of the
2533 `elf_external_linux_*' structures and written out to an output bfd
2534 by one of the functions declared below. */
2536 struct elf_internal_linux_prpsinfo
2538 char pr_state; /* Numeric process state. */
2539 char pr_sname; /* Char for pr_state. */
2540 char pr_zomb; /* Zombie. */
2541 char pr_nice; /* Nice val. */
2542 unsigned long pr_flag; /* Flags. */
2543 unsigned int pr_uid;
2544 unsigned int pr_gid;
2545 int pr_pid, pr_ppid, pr_pgrp, pr_sid;
2546 char pr_fname[16 + 1]; /* Filename of executable. */
2547 char pr_psargs[80 + 1]; /* Initial part of arg list. */
2550 /* Linux/most 32-bit archs. */
2551 extern char *elfcore_write_linux_prpsinfo32
2552 (bfd *, char *, int *, const struct elf_internal_linux_prpsinfo *);
2554 /* Linux/most 64-bit archs. */
2555 extern char *elfcore_write_linux_prpsinfo64
2556 (bfd *, char *, int *, const struct elf_internal_linux_prpsinfo *);
2558 /* Linux/PPC32 uses different layout compared to most archs. */
2559 extern char *elfcore_write_ppc_linux_prpsinfo32
2560 (bfd *, char *, int *, const struct elf_internal_linux_prpsinfo *);
2562 extern bfd *_bfd_elf32_bfd_from_remote_memory
2563 (bfd *templ, bfd_vma ehdr_vma, bfd_size_type size, bfd_vma *loadbasep,
2564 int (*target_read_memory) (bfd_vma, bfd_byte *, bfd_size_type));
2565 extern bfd *_bfd_elf64_bfd_from_remote_memory
2566 (bfd *templ, bfd_vma ehdr_vma, bfd_size_type size, bfd_vma *loadbasep,
2567 int (*target_read_memory) (bfd_vma, bfd_byte *, bfd_size_type));
2569 extern bfd_vma bfd_elf_obj_attr_size (bfd *);
2570 extern void bfd_elf_set_obj_attr_contents (bfd *, bfd_byte *, bfd_vma);
2571 extern int bfd_elf_get_obj_attr_int (bfd *, int, unsigned int);
2572 extern void bfd_elf_add_obj_attr_int (bfd *, int, unsigned int, unsigned int);
2573 #define bfd_elf_add_proc_attr_int(BFD, TAG, VALUE) \
2574 bfd_elf_add_obj_attr_int ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2575 extern void bfd_elf_add_obj_attr_string (bfd *, int, unsigned int, const char *);
2576 #define bfd_elf_add_proc_attr_string(BFD, TAG, VALUE) \
2577 bfd_elf_add_obj_attr_string ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2578 extern void bfd_elf_add_obj_attr_int_string (bfd *, int, unsigned int,
2579 unsigned int, const char *);
2580 #define bfd_elf_add_proc_attr_int_string(BFD, TAG, INTVAL, STRVAL) \
2581 bfd_elf_add_obj_attr_int_string ((BFD), OBJ_ATTR_PROC, (TAG), \
2584 extern char *_bfd_elf_attr_strdup (bfd *, const char *);
2585 extern void _bfd_elf_copy_obj_attributes (bfd *, bfd *);
2586 extern int _bfd_elf_obj_attrs_arg_type (bfd *, int, unsigned int);
2587 extern void _bfd_elf_parse_attributes (bfd *, Elf_Internal_Shdr *);
2588 extern bfd_boolean _bfd_elf_merge_object_attributes
2589 (bfd *, struct bfd_link_info *);
2590 extern bfd_boolean _bfd_elf_merge_unknown_attribute_low (bfd *, bfd *, int);
2591 extern bfd_boolean _bfd_elf_merge_unknown_attribute_list (bfd *, bfd *);
2592 extern Elf_Internal_Shdr *_bfd_elf_single_rel_hdr (asection *sec);
2594 extern bfd_boolean _bfd_elf_parse_gnu_properties
2595 (bfd *, Elf_Internal_Note *);
2596 extern elf_property * _bfd_elf_get_property
2597 (bfd *, unsigned int, unsigned int);
2598 extern void _bfd_elf_link_setup_gnu_properties
2599 (struct bfd_link_info *);
2601 /* The linker may need to keep track of the number of relocs that it
2602 decides to copy as dynamic relocs in check_relocs for each symbol.
2603 This is so that it can later discard them if they are found to be
2604 unnecessary. We can store the information in a field extending the
2605 regular ELF linker hash table. */
2607 struct elf_dyn_relocs
2609 struct elf_dyn_relocs *next;
2611 /* The input section of the reloc. */
2614 /* Total number of relocs copied for the input section. */
2615 bfd_size_type count;
2617 /* Number of pc-relative relocs copied for the input section. */
2618 bfd_size_type pc_count;
2621 extern bfd_boolean _bfd_elf_create_ifunc_sections
2622 (bfd *, struct bfd_link_info *);
2623 extern bfd_boolean _bfd_elf_allocate_ifunc_dyn_relocs
2624 (struct bfd_link_info *, struct elf_link_hash_entry *,
2625 struct elf_dyn_relocs **, bfd_boolean *, unsigned int,
2626 unsigned int, unsigned int, bfd_boolean);
2627 extern long _bfd_elf_ifunc_get_synthetic_symtab
2628 (bfd *, long, asymbol **, long, asymbol **, asymbol **, asection *,
2629 bfd_vma *(*) (bfd *, asymbol **, asection *, asection *));
2631 extern void elf_append_rela (bfd *, asection *, Elf_Internal_Rela *);
2632 extern void elf_append_rel (bfd *, asection *, Elf_Internal_Rela *);
2634 extern bfd_vma elf64_r_info (bfd_vma, bfd_vma);
2635 extern bfd_vma elf64_r_sym (bfd_vma);
2636 extern bfd_vma elf32_r_info (bfd_vma, bfd_vma);
2637 extern bfd_vma elf32_r_sym (bfd_vma);
2639 /* Large common section. */
2640 extern asection _bfd_elf_large_com_section;
2642 /* Hash for local symbol with the first section id, ID, in the input
2643 file and the local symbol index, SYM. */
2644 #define ELF_LOCAL_SYMBOL_HASH(ID, SYM) \
2645 (((((ID) & 0xff) << 24) | (((ID) & 0xff00) << 8)) \
2646 ^ (SYM) ^ ((ID) >> 16))
2648 /* This is the condition under which finish_dynamic_symbol will be called.
2649 If our finish_dynamic_symbol isn't called, we'll need to do something
2650 about initializing any .plt and .got entries in relocate_section. */
2651 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
2653 && ((SHARED) || !(H)->forced_local) \
2654 && ((H)->dynindx != -1 || (H)->forced_local))
2656 /* This macro is to avoid lots of duplicated code in the body
2657 of xxx_relocate_section() in the various elfxx-xxxx.c files. */
2658 #define RELOC_FOR_GLOBAL_SYMBOL(info, input_bfd, input_section, rel, \
2659 r_symndx, symtab_hdr, sym_hashes, \
2660 h, sec, relocation, \
2661 unresolved_reloc, warned, ignored) \
2664 /* It seems this can happen with erroneous or unsupported \
2665 input (mixing a.out and elf in an archive, for example.) */ \
2666 if (sym_hashes == NULL) \
2669 h = sym_hashes[r_symndx - symtab_hdr->sh_info]; \
2671 if (info->wrap_hash != NULL \
2672 && (input_section->flags & SEC_DEBUGGING) != 0) \
2673 h = ((struct elf_link_hash_entry *) \
2674 unwrap_hash_lookup (info, input_bfd, &h->root)); \
2676 while (h->root.type == bfd_link_hash_indirect \
2677 || h->root.type == bfd_link_hash_warning) \
2678 h = (struct elf_link_hash_entry *) h->root.u.i.link; \
2682 unresolved_reloc = FALSE; \
2684 if (h->root.type == bfd_link_hash_defined \
2685 || h->root.type == bfd_link_hash_defweak) \
2687 sec = h->root.u.def.section; \
2689 || sec->output_section == NULL) \
2690 /* Set a flag that will be cleared later if we find a \
2691 relocation value for this symbol. output_section \
2692 is typically NULL for symbols satisfied by a shared \
2694 unresolved_reloc = TRUE; \
2696 relocation = (h->root.u.def.value \
2697 + sec->output_section->vma \
2698 + sec->output_offset); \
2700 else if (h->root.type == bfd_link_hash_undefweak) \
2702 else if (info->unresolved_syms_in_objects == RM_IGNORE \
2703 && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) \
2705 else if (!bfd_link_relocatable (info)) \
2708 err = (info->unresolved_syms_in_objects == RM_GENERATE_ERROR \
2709 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT); \
2710 (*info->callbacks->undefined_symbol) (info, \
2711 h->root.root.string, \
2714 rel->r_offset, err); \
2717 (void) unresolved_reloc; \
2723 /* This macro is to avoid lots of duplicated code in the body of the
2724 loop over relocations in xxx_relocate_section() in the various
2727 Handle relocations against symbols from removed linkonce sections,
2728 or sections discarded by a linker script. When doing a relocatable
2729 link, we remove such relocations. Otherwise, we just want the
2730 section contents zeroed and avoid any special processing. */
2731 #define RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \
2732 rel, count, relend, \
2733 howto, index, contents) \
2736 _bfd_clear_contents (howto, input_bfd, input_section, \
2737 contents + rel[index].r_offset); \
2739 if (bfd_link_relocatable (info) \
2740 && (input_section->flags & SEC_DEBUGGING)) \
2742 /* Only remove relocations in debug sections since other \
2743 sections may require relocations. */ \
2744 Elf_Internal_Shdr *rel_hdr; \
2746 rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \
2748 /* Avoid empty output section. */ \
2749 if (rel_hdr->sh_size > rel_hdr->sh_entsize) \
2751 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
2752 rel_hdr = _bfd_elf_single_rel_hdr (input_section); \
2753 rel_hdr->sh_size -= rel_hdr->sh_entsize; \
2755 memmove (rel, rel + count, \
2756 (relend - rel - count) * sizeof (*rel)); \
2758 input_section->reloc_count--; \
2765 for (i_ = 0; i_ < count; i_++) \
2767 rel[i_].r_info = 0; \
2768 rel[i_].r_addend = 0; \
2774 /* Will a symbol be bound to the definition within the shared
2775 library, if any. A unique symbol can never be bound locally. */
2776 #define SYMBOLIC_BIND(INFO, H) \
2777 (!(H)->unique_global \
2778 && ((INFO)->symbolic || ((INFO)->dynamic && !(H)->dynamic)))
2783 #endif /* _LIBELF_H_ */