1 /* BFD back-end data structures for ELF files.
2 Copyright (C) 1992, 93, 94, 95, 96, 97, 98, 1999, 2000 Free Software
4 Written by Cygnus Support.
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
25 #include "elf/common.h"
26 #include "elf/internal.h"
27 #include "elf/external.h"
30 /* If size isn't specified as 64 or 32, NAME macro should fail. */
33 #define NAME(x,y) CAT4(x,64,_,y)
36 #define NAME(x,y) CAT4(x,32,_,y)
41 #define NAME(x,y) CAT4(x,NOSIZE,_,y)
44 #define ElfNAME(X) NAME(Elf,X)
45 #define elfNAME(X) NAME(elf,X)
47 /* Information held for an ELF symbol. The first field is the
48 corresponding asymbol. Every symbol is an ELF file is actually a
49 pointer to this structure, although it is often handled as a
50 pointer to an asymbol. */
56 /* ELF symbol information. */
57 Elf_Internal_Sym internal_elf_sym;
58 /* Backend specific information. */
61 unsigned int hppa_arg_reloc;
67 /* Version information. This is from an Elf_Internal_Versym
68 structure in a SHT_GNU_versym section. It is zero if there is no
69 version information. */
70 unsigned short version;
74 /* ELF linker hash table entries. */
76 struct elf_link_hash_entry
78 struct bfd_link_hash_entry root;
80 /* Symbol index in output file. This is initialized to -1. It is
81 set to -2 if the symbol is used by a reloc. */
87 /* Symbol index as a dynamic symbol. Initialized to -1, and remains
88 -1 if this is not a dynamic symbol. */
89 /* ??? Note that this is consistently used as a synonym for tests
90 against whether we can perform various simplifying transformations
91 to the code. (E.g. changing a pc-relative jump to a PLT entry
92 into a pc-relative jump to the target function.) That test, which
93 is often relatively complex, and someplaces wrong or incomplete,
94 should really be replaced by a predicate in elflink.c.
96 End result: this field -1 does not indicate that the symbol is
97 not in the dynamic symbol table, but rather that the symbol is
98 not visible outside this DSO. */
101 /* String table index in .dynstr if this is a dynamic symbol. */
102 unsigned long dynstr_index;
104 /* If this is a weak defined symbol from a dynamic object, this
105 field points to a defined symbol with the same value, if there is
106 one. Otherwise it is NULL. */
107 struct elf_link_hash_entry *weakdef;
109 /* If this symbol requires an entry in the global offset table, the
110 processor specific backend uses this field to track usage and
111 final offset. We use a union and two names primarily to document
112 the intent of any particular piece of code. The field should be
113 used as a count until size_dynamic_sections, at which point the
114 contents of the .got is fixed. Afterward, if this field is -1,
115 then the symbol does not require a global offset table entry. */
118 bfd_signed_vma refcount;
122 /* Same, but tracks a procedure linkage table entry. */
125 bfd_signed_vma refcount;
129 /* If this symbol is used in the linker created sections, the processor
130 specific backend uses this field to map the field into the offset
131 from the beginning of the section. */
132 struct elf_linker_section_pointers *linker_section_pointer;
134 /* Version information. */
137 /* This field is used for a symbol which is not defined in a
138 regular object. It points to the version information read in
139 from the dynamic object. */
140 Elf_Internal_Verdef *verdef;
141 /* This field is used for a symbol which is defined in a regular
142 object. It is set up in size_dynamic_sections. It points to
143 the version information we should write out for this symbol. */
144 struct bfd_elf_version_tree *vertree;
147 /* Virtual table entry use information. This array is nominally of size
148 size/sizeof(target_void_pointer), though we have to be able to assume
149 and track a size while the symbol is still undefined. It is indexed
150 via offset/sizeof(target_void_pointer). */
151 size_t vtable_entries_size;
152 boolean *vtable_entries_used;
154 /* Virtual table derivation info. */
155 struct elf_link_hash_entry *vtable_parent;
157 /* Symbol type (STT_NOTYPE, STT_OBJECT, etc.). */
160 /* Symbol st_other value, symbol visibility. */
163 /* Hash value of the name computed using the ELF hash function. */
164 unsigned long elf_hash_value;
166 /* Some flags; legal values follow. */
167 unsigned short elf_link_hash_flags;
168 /* Symbol is referenced by a non-shared object. */
169 #define ELF_LINK_HASH_REF_REGULAR 01
170 /* Symbol is defined by a non-shared object. */
171 #define ELF_LINK_HASH_DEF_REGULAR 02
172 /* Symbol is referenced by a shared object. */
173 #define ELF_LINK_HASH_REF_DYNAMIC 04
174 /* Symbol is defined by a shared object. */
175 #define ELF_LINK_HASH_DEF_DYNAMIC 010
176 /* Symbol has a non-weak reference from a non-shared object. */
177 #define ELF_LINK_HASH_REF_REGULAR_NONWEAK 020
178 /* Dynamic symbol has been adjustd. */
179 #define ELF_LINK_HASH_DYNAMIC_ADJUSTED 040
180 /* Symbol needs a copy reloc. */
181 #define ELF_LINK_HASH_NEEDS_COPY 0100
182 /* Symbol needs a procedure linkage table entry. */
183 #define ELF_LINK_HASH_NEEDS_PLT 0200
184 /* Symbol appears in a non-ELF input file. */
185 #define ELF_LINK_NON_ELF 0400
186 /* Symbol should be marked as hidden in the version information. */
187 #define ELF_LINK_HIDDEN 01000
188 /* Symbol was forced to local scope due to a version script file. */
189 #define ELF_LINK_FORCED_LOCAL 02000
190 /* Symbol was marked during garbage collection. */
191 #define ELF_LINK_HASH_MARK 04000
192 /* Symbol is referenced by a non-GOT/non-PLT relocation. This is
193 not currently set by all the backends. */
194 #define ELF_LINK_NON_GOT_REF 010000
197 /* Records local symbols to be emitted in the dynamic symbol table. */
199 struct elf_link_local_dynamic_entry
201 struct elf_link_local_dynamic_entry *next;
203 /* The input bfd this symbol came from. */
206 /* The index of the local symbol being copied. */
209 /* The index in the outgoing dynamic symbol table. */
212 /* A copy of the input symbol. */
213 Elf_Internal_Sym isym;
216 /* ELF linker hash table. */
218 struct elf_link_hash_table
220 struct bfd_link_hash_table root;
221 /* Whether we have created the special dynamic sections required
222 when linking against or generating a shared object. */
223 boolean dynamic_sections_created;
224 /* The BFD used to hold special sections created by the linker.
225 This will be the first BFD found which requires these sections to
228 /* The number of symbols found in the link which must be put into
229 the .dynsym section. */
230 bfd_size_type dynsymcount;
231 /* The string table of dynamic symbols, which becomes the .dynstr
233 struct bfd_strtab_hash *dynstr;
234 /* The number of buckets in the hash table in the .hash section.
235 This is based on the number of dynamic symbols. */
236 bfd_size_type bucketcount;
237 /* A linked list of DT_NEEDED names found in dynamic objects
238 included in the link. */
239 struct bfd_link_needed_list *needed;
240 /* The _GLOBAL_OFFSET_TABLE_ symbol. */
241 struct elf_link_hash_entry *hgot;
242 /* A pointer to information used to link stabs in sections. */
244 /* A linked list of local symbols to be added to .dynsym. */
245 struct elf_link_local_dynamic_entry *dynlocal;
248 /* Look up an entry in an ELF linker hash table. */
250 #define elf_link_hash_lookup(table, string, create, copy, follow) \
251 ((struct elf_link_hash_entry *) \
252 bfd_link_hash_lookup (&(table)->root, (string), (create), \
255 /* Traverse an ELF linker hash table. */
257 #define elf_link_hash_traverse(table, func, info) \
258 (bfd_link_hash_traverse \
260 (boolean (*) PARAMS ((struct bfd_link_hash_entry *, PTR))) (func), \
263 /* Get the ELF linker hash table from a link_info structure. */
265 #define elf_hash_table(p) ((struct elf_link_hash_table *) ((p)->hash))
267 /* Constant information held for an ELF backend. */
269 struct elf_size_info {
270 unsigned char sizeof_ehdr, sizeof_phdr, sizeof_shdr;
271 unsigned char sizeof_rel, sizeof_rela, sizeof_sym, sizeof_dyn, sizeof_note;
273 /* The size of entries in the .hash section. */
274 unsigned char sizeof_hash_entry;
276 /* The number of internal relocations to allocate per external
278 unsigned char int_rels_per_ext_rel;
280 unsigned char arch_size, file_align;
281 unsigned char elfclass, ev_current;
282 int (*write_out_phdrs) PARAMS ((bfd *, const Elf_Internal_Phdr *, int));
283 boolean (*write_shdrs_and_ehdr) PARAMS ((bfd *));
284 void (*write_relocs) PARAMS ((bfd *, asection *, PTR));
285 void (*swap_symbol_out) PARAMS ((bfd *, const Elf_Internal_Sym *, PTR));
286 boolean (*slurp_reloc_table)
287 PARAMS ((bfd *, asection *, asymbol **, boolean));
288 long (*slurp_symbol_table) PARAMS ((bfd *, asymbol **, boolean));
289 void (*swap_dyn_in) PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *));
290 void (*swap_dyn_out) PARAMS ((bfd *, const Elf_Internal_Dyn *, PTR));
292 /* This function, if defined, is called to swap in a REL
293 relocation. If an external relocation corresponds to more than
294 one internal relocation, then all relocations are swapped in at
296 void (*swap_reloc_in)
297 PARAMS ((bfd *, const bfd_byte *, Elf_Internal_Rel *));
299 /* This function, if defined, is called to swap out a REL
301 void (*swap_reloc_out)
302 PARAMS ((bfd *, const Elf_Internal_Rel *, bfd_byte *));
304 /* This function, if defined, is called to swap in a RELA
305 relocation. If an external relocation corresponds to more than
306 one internal relocation, then all relocations are swapped in at
308 void (*swap_reloca_in)
309 PARAMS ((bfd *, const bfd_byte *, Elf_Internal_Rela *));
311 /* This function, if defined, is called to swap out a RELA
313 void (*swap_reloca_out)
314 PARAMS ((bfd *, const Elf_Internal_Rela *, bfd_byte *));
318 #define elf_symbol_from(ABFD,S) \
319 (((S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \
320 && (S)->the_bfd->tdata.elf_obj_data != 0) \
321 ? (elf_symbol_type *) (S) \
324 struct elf_backend_data
326 /* The architecture for this backend. */
327 enum bfd_architecture arch;
329 /* The ELF machine code (EM_xxxx) for this backend. */
330 int elf_machine_code;
332 /* The maximum page size for this backend. */
335 /* A function to translate an ELF RELA relocation to a BFD arelent
337 void (*elf_info_to_howto) PARAMS ((bfd *, arelent *,
338 Elf_Internal_Rela *));
340 /* A function to translate an ELF REL relocation to a BFD arelent
342 void (*elf_info_to_howto_rel) PARAMS ((bfd *, arelent *,
343 Elf_Internal_Rel *));
345 /* A function to determine whether a symbol is global when
346 partitioning the symbol table into local and global symbols.
347 This should be NULL for most targets, in which case the correct
348 thing will be done. MIPS ELF, at least on the Irix 5, has
349 special requirements. */
350 boolean (*elf_backend_sym_is_global) PARAMS ((bfd *, asymbol *));
352 /* The remaining functions are hooks which are called only if they
355 /* A function to permit a backend specific check on whether a
356 particular BFD format is relevant for an object file, and to
357 permit the backend to set any global information it wishes. When
358 this is called elf_elfheader is set, but anything else should be
359 used with caution. If this returns false, the check_format
360 routine will return a bfd_error_wrong_format error. */
361 boolean (*elf_backend_object_p) PARAMS ((bfd *));
363 /* A function to do additional symbol processing when reading the
364 ELF symbol table. This is where any processor-specific special
365 section indices are handled. */
366 void (*elf_backend_symbol_processing) PARAMS ((bfd *, asymbol *));
368 /* A function to do additional symbol processing after reading the
369 entire ELF symbol table. */
370 boolean (*elf_backend_symbol_table_processing) PARAMS ((bfd *,
374 /* A function to set the type of the info field. Processor-specific
375 types should be handled here. */
376 int (*elf_backend_get_symbol_type) PARAMS (( Elf_Internal_Sym *, int));
378 /* A function to do additional processing on the ELF section header
379 just before writing it out. This is used to set the flags and
380 type fields for some sections, or to actually write out data for
382 boolean (*elf_backend_section_processing) PARAMS ((bfd *,
383 Elf32_Internal_Shdr *));
385 /* A function to handle unusual section types when creating BFD
386 sections from ELF sections. */
387 boolean (*elf_backend_section_from_shdr) PARAMS ((bfd *,
388 Elf32_Internal_Shdr *,
391 /* A function to handle unusual program segment types when creating BFD
392 sections from ELF program segments. */
393 boolean (*elf_backend_section_from_phdr) PARAMS ((bfd *,
394 Elf32_Internal_Phdr *,
397 /* A function to set up the ELF section header for a BFD section in
398 preparation for writing it out. This is where the flags and type
399 fields are set for unusual sections. */
400 boolean (*elf_backend_fake_sections) PARAMS ((bfd *, Elf32_Internal_Shdr *,
403 /* A function to get the ELF section index for a BFD section. If
404 this returns true, the section was found. If it is a normal ELF
405 section, *RETVAL should be left unchanged. If it is not a normal
406 ELF section *RETVAL should be set to the SHN_xxxx index. */
407 boolean (*elf_backend_section_from_bfd_section)
408 PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *, int *retval));
410 /* If this field is not NULL, it is called by the add_symbols phase
411 of a link just before adding a symbol to the global linker hash
412 table. It may modify any of the fields as it wishes. If *NAME
413 is set to NULL, the symbol will be skipped rather than being
414 added to the hash table. This function is responsible for
415 handling all processor dependent symbol bindings and section
416 indices, and must set at least *FLAGS and *SEC for each processor
417 dependent case; failure to do so will cause a link error. */
418 boolean (*elf_add_symbol_hook)
419 PARAMS ((bfd *abfd, struct bfd_link_info *info,
420 const Elf_Internal_Sym *, const char **name,
421 flagword *flags, asection **sec, bfd_vma *value));
423 /* If this field is not NULL, it is called by the elf_link_output_sym
424 phase of a link for each symbol which will appear in the object file. */
425 boolean (*elf_backend_link_output_symbol_hook)
426 PARAMS ((bfd *, struct bfd_link_info *info, const char *,
427 Elf_Internal_Sym *, asection *));
429 /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend
430 linker the first time it encounters a dynamic object in the link.
431 This function must create any sections required for dynamic
432 linking. The ABFD argument is a dynamic object. The .interp,
433 .dynamic, .dynsym, .dynstr, and .hash functions have already been
434 created, and this function may modify the section flags if
435 desired. This function will normally create the .got and .plt
436 sections, but different backends have different requirements. */
437 boolean (*elf_backend_create_dynamic_sections)
438 PARAMS ((bfd *abfd, struct bfd_link_info *info));
440 /* The CHECK_RELOCS function is called by the add_symbols phase of
441 the ELF backend linker. It is called once for each section with
442 relocs of an object file, just after the symbols for the object
443 file have been added to the global linker hash table. The
444 function must look through the relocs and do any special handling
445 required. This generally means allocating space in the global
446 offset table, and perhaps allocating space for a reloc. The
447 relocs are always passed as Rela structures; if the section
448 actually uses Rel structures, the r_addend field will always be
450 boolean (*check_relocs)
451 PARAMS ((bfd *abfd, struct bfd_link_info *info, asection *o,
452 const Elf_Internal_Rela *relocs));
454 /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
455 linker for every symbol which is defined by a dynamic object and
456 referenced by a regular object. This is called after all the
457 input files have been seen, but before the SIZE_DYNAMIC_SECTIONS
458 function has been called. The hash table entry should be
459 bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be
460 defined in a section from a dynamic object. Dynamic object
461 sections are not included in the final link, and this function is
462 responsible for changing the value to something which the rest of
463 the link can deal with. This will normally involve adding an
464 entry to the .plt or .got or some such section, and setting the
465 symbol to point to that. */
466 boolean (*elf_backend_adjust_dynamic_symbol)
467 PARAMS ((struct bfd_link_info *info, struct elf_link_hash_entry *h));
469 /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker
470 after all the linker input files have been seen but before the
471 section sizes have been set. This is called after
472 ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS. */
473 boolean (*elf_backend_always_size_sections)
474 PARAMS ((bfd *output_bfd, struct bfd_link_info *info));
476 /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend
477 linker after all the linker input files have been seen but before
478 the sections sizes have been set. This is called after
479 ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols.
480 It is only called when linking against a dynamic object. It must
481 set the sizes of the dynamic sections, and may fill in their
482 contents as well. The generic ELF linker can handle the .dynsym,
483 .dynstr and .hash sections. This function must handle the
484 .interp section and any sections created by the
485 CREATE_DYNAMIC_SECTIONS entry point. */
486 boolean (*elf_backend_size_dynamic_sections)
487 PARAMS ((bfd *output_bfd, struct bfd_link_info *info));
489 /* The RELOCATE_SECTION function is called by the ELF backend linker
490 to handle the relocations for a section.
492 The relocs are always passed as Rela structures; if the section
493 actually uses Rel structures, the r_addend field will always be
496 This function is responsible for adjust the section contents as
497 necessary, and (if using Rela relocs and generating a
498 relocateable output file) adjusting the reloc addend as
501 This function does not have to worry about setting the reloc
502 address or the reloc symbol index.
504 LOCAL_SYMS is a pointer to the swapped in local symbols.
506 LOCAL_SECTIONS is an array giving the section in the input file
507 corresponding to the st_shndx field of each local symbol.
509 The global hash table entry for the global symbols can be found
510 via elf_sym_hashes (input_bfd).
512 When generating relocateable output, this function must handle
513 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
514 going to be the section symbol corresponding to the output
515 section, which means that the addend must be adjusted
517 boolean (*elf_backend_relocate_section)
518 PARAMS ((bfd *output_bfd, struct bfd_link_info *info,
519 bfd *input_bfd, asection *input_section, bfd_byte *contents,
520 Elf_Internal_Rela *relocs, Elf_Internal_Sym *local_syms,
521 asection **local_sections));
523 /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend
524 linker just before it writes a symbol out to the .dynsym section.
525 The processor backend may make any required adjustment to the
526 symbol. It may also take the opportunity to set contents of the
527 dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on
528 all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called
529 on those symbols which are defined by a dynamic object. */
530 boolean (*elf_backend_finish_dynamic_symbol)
531 PARAMS ((bfd *output_bfd, struct bfd_link_info *info,
532 struct elf_link_hash_entry *h, Elf_Internal_Sym *sym));
534 /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend
535 linker just before it writes all the dynamic sections out to the
536 output file. The FINISH_DYNAMIC_SYMBOL will have been called on
537 all dynamic symbols. */
538 boolean (*elf_backend_finish_dynamic_sections)
539 PARAMS ((bfd *output_bfd, struct bfd_link_info *info));
541 /* A function to do any beginning processing needed for the ELF file
542 before building the ELF headers and computing file positions. */
543 void (*elf_backend_begin_write_processing)
544 PARAMS ((bfd *, struct bfd_link_info *));
546 /* A function to do any final processing needed for the ELF file
547 before writing it out. The LINKER argument is true if this BFD
548 was created by the ELF backend linker. */
549 void (*elf_backend_final_write_processing)
550 PARAMS ((bfd *, boolean linker));
552 /* This function is called by get_program_header_size. It should
553 return the number of additional program segments which this BFD
554 will need. It should return -1 on error. */
555 int (*elf_backend_additional_program_headers) PARAMS ((bfd *));
557 /* This function is called to modify an existing segment map in a
558 backend specific fashion. */
559 boolean (*elf_backend_modify_segment_map) PARAMS ((bfd *));
561 /* This function is called during section gc to discover the section a
562 particular relocation refers to. It need not be defined for hosts
563 that have no queer relocation types. */
564 asection * (*gc_mark_hook)
565 PARAMS ((bfd *abfd, struct bfd_link_info *, Elf_Internal_Rela *,
566 struct elf_link_hash_entry *h, Elf_Internal_Sym *));
568 /* This function, if defined, is called during the sweep phase of gc
569 in order that a backend might update any data structures it might
571 boolean (*gc_sweep_hook)
572 PARAMS ((bfd *abfd, struct bfd_link_info *info, asection *o,
573 const Elf_Internal_Rela *relocs));
575 /* This function, if defined, is called after the ELF headers have
576 been created. This allows for things like the OS and ABI versions
578 void (*elf_backend_post_process_headers)
579 PARAMS ((bfd *, struct bfd_link_info *));
581 /* This function, if defined, prints a symbol to file and returns the
582 name of the symbol to be printed. It should return NULL to fall
583 back to default symbol printing. */
584 const char *(*elf_backend_print_symbol_all)
585 PARAMS ((bfd *, PTR, asymbol *));
587 /* This function, if defined, is called after all local symbols and
588 global symbols converted to locals are emited into the symtab
589 section. It allows the backend to emit special global symbols
590 not handled in the hash table. */
591 boolean (*elf_backend_output_arch_syms)
592 PARAMS ((bfd *, struct bfd_link_info *, PTR,
593 boolean (*) PARAMS ((PTR, const char *,
594 Elf_Internal_Sym *, asection *))));
596 /* Copy any information related to dynamic linking from a pre-existing
597 symbol IND to a newly created symbol DIR. */
598 void (*elf_backend_copy_indirect_symbol)
599 PARAMS ((struct elf_link_hash_entry *, struct elf_link_hash_entry *));
601 /* Modify any information related to dynamic linking such that the
602 symbol is not exported. */
603 void (*elf_backend_hide_symbol)
604 PARAMS ((struct elf_link_hash_entry *));
606 /* The swapping table to use when dealing with ECOFF information.
607 Used for the MIPS ELF .mdebug section. */
608 const struct ecoff_debug_swap *elf_backend_ecoff_debug_swap;
610 /* Alternate EM_xxxx machine codes for this backend. */
611 int elf_machine_alt1;
612 int elf_machine_alt2;
614 const struct elf_size_info *s;
616 /* offset of the _GLOBAL_OFFSET_TABLE_ symbol from the start of the
618 bfd_vma got_symbol_offset;
620 /* The size in bytes of the headers for the GOT and PLT. This includes
621 the so-called reserved entries on some systems. */
622 bfd_vma got_header_size;
623 bfd_vma plt_header_size;
625 /* This is true if the linker should act like collect and gather
626 global constructors and destructors by name. This is true for
627 MIPS ELF because the Irix 5 tools can not handle the .init
629 unsigned collect : 1;
631 /* This is true if the linker should ignore changes to the type of a
632 symbol. This is true for MIPS ELF because some Irix 5 objects
633 record undefined functions as STT_OBJECT although the definitions
635 unsigned type_change_ok : 1;
637 /* Whether the backend may use REL relocations. (Some backends use
638 both REL and RELA relocations, and this flag is set for those
640 unsigned may_use_rel_p : 1;
642 /* Whether the backend may use RELA relocations. (Some backends use
643 both REL and RELA relocations, and this flag is set for those
645 unsigned may_use_rela_p : 1;
647 /* Whether the default relocation type is RELA. If a backend with
648 this flag set wants REL relocations for a particular section,
649 it must note that explicitly. Similarly, if this flag is clear,
650 and the backend wants RELA relocations for a particular
652 unsigned default_use_rela_p : 1;
654 /* True if addresses "naturally" sign extend. This is used when
655 swapping in from Elf32 when BFD64. */
656 unsigned sign_extend_vma : 1;
658 unsigned want_got_plt : 1;
659 unsigned plt_readonly : 1;
660 unsigned want_plt_sym : 1;
661 unsigned plt_not_loaded : 1;
662 unsigned plt_alignment : 4;
663 unsigned can_gc_sections : 1;
664 unsigned want_dynbss : 1;
667 /* Information stored for each BFD section in an ELF file. This
668 structure is allocated by elf_new_section_hook. */
670 struct bfd_elf_section_data
672 /* The ELF header for this section. */
673 Elf_Internal_Shdr this_hdr;
674 /* The ELF header for the reloc section associated with this
676 Elf_Internal_Shdr rel_hdr;
677 /* If there is a second reloc section associated with this section,
678 as can happen on Irix 6, this field points to the header. */
679 Elf_Internal_Shdr *rel_hdr2;
680 /* The number of relocations currently assigned to REL_HDR. */
681 unsigned int rel_count;
682 /* The number of relocations currently assigned to REL_HDR2. */
683 unsigned int rel_count2;
684 /* The ELF section number of this section. Only used for an output
687 /* The ELF section number of the reloc section indicated by
688 REL_HDR if any. Only used for an output file. */
690 /* The ELF section number of the reloc section indicated by
691 REL_HDR2 if any. Only used for an output file. */
693 /* Used by the backend linker to store the symbol hash table entries
694 associated with relocs against global symbols. */
695 struct elf_link_hash_entry **rel_hashes;
696 /* A pointer to the swapped relocs. If the section uses REL relocs,
697 rather than RELA, all the r_addend fields will be zero. This
698 pointer may be NULL. It is used by the backend linker. */
699 Elf_Internal_Rela *relocs;
700 /* Used by the backend linker when generating a shared library to
701 record the dynamic symbol index for a section symbol
702 corresponding to this section. A value of 0 means that there is
703 no dynamic symbol for this section. */
705 /* A pointer used for .stab linking optimizations. */
707 /* A pointer available for the processor specific ELF backend. */
709 /* Nonzero if this section uses RELA relocations, rather than REL. */
710 unsigned int use_rela_p:1;
713 #define elf_section_data(sec) ((struct bfd_elf_section_data*)sec->used_by_bfd)
715 #define get_elf_backend_data(abfd) \
716 ((struct elf_backend_data *) (abfd)->xvec->backend_data)
718 /* Enumeration to specify the special section. */
719 typedef enum elf_linker_section_enum
721 LINKER_SECTION_UNKNOWN, /* not used */
722 LINKER_SECTION_GOT, /* .got section for global offset pointers */
723 LINKER_SECTION_PLT, /* .plt section for generated procedure stubs */
724 LINKER_SECTION_SDATA, /* .sdata/.sbss section for PowerPC */
725 LINKER_SECTION_SDATA2, /* .sdata2/.sbss2 section for PowerPC */
726 LINKER_SECTION_MAX /* # of linker sections */
727 } elf_linker_section_enum_t;
729 /* Sections created by the linker. */
731 typedef struct elf_linker_section
733 char *name; /* name of the section */
734 char *rel_name; /* name of the associated .rel{,a}. section */
735 char *bss_name; /* name of a related .bss section */
736 char *sym_name; /* name of symbol to reference this section */
737 asection *section; /* pointer to the section */
738 asection *bss_section; /* pointer to the bss section associated with this */
739 asection *rel_section; /* pointer to the relocations needed for this section */
740 struct elf_link_hash_entry *sym_hash; /* pointer to the created symbol hash value */
741 bfd_vma initial_size; /* initial size before any linker generated allocations */
742 bfd_vma sym_offset; /* offset of symbol from beginning of section */
743 bfd_vma hole_size; /* size of reserved address hole in allocation */
744 bfd_vma hole_offset; /* current offset for the hole */
745 bfd_vma max_hole_offset; /* maximum offset for the hole */
746 elf_linker_section_enum_t which; /* which section this is */
747 boolean hole_written_p; /* whether the hole has been initialized */
748 unsigned int alignment; /* alignment for the section */
749 flagword flags; /* flags to use to create the section */
750 } elf_linker_section_t;
752 /* Linked list of allocated pointer entries. This hangs off of the symbol lists, and
753 provides allows us to return different pointers, based on different addend's. */
755 typedef struct elf_linker_section_pointers
757 struct elf_linker_section_pointers *next; /* next allocated pointer for this symbol */
758 bfd_vma offset; /* offset of pointer from beginning of section */
759 bfd_signed_vma addend; /* addend used */
760 elf_linker_section_enum_t which; /* which linker section this is */
761 boolean written_address_p; /* whether address was written yet */
762 } elf_linker_section_pointers_t;
764 /* Some private data is stashed away for future use using the tdata pointer
765 in the bfd structure. */
769 Elf_Internal_Ehdr elf_header[1]; /* Actual data, but ref like ptr */
770 Elf_Internal_Shdr **elf_sect_ptr;
771 Elf_Internal_Phdr *phdr;
772 struct elf_segment_map *segment_map;
773 struct bfd_strtab_hash *strtab_ptr;
776 asymbol **section_syms; /* STT_SECTION symbols for each section */
777 Elf_Internal_Shdr symtab_hdr;
778 Elf_Internal_Shdr shstrtab_hdr;
779 Elf_Internal_Shdr strtab_hdr;
780 Elf_Internal_Shdr dynsymtab_hdr;
781 Elf_Internal_Shdr dynstrtab_hdr;
782 Elf_Internal_Shdr dynversym_hdr;
783 Elf_Internal_Shdr dynverref_hdr;
784 Elf_Internal_Shdr dynverdef_hdr;
785 unsigned int symtab_section, shstrtab_section;
786 unsigned int strtab_section, dynsymtab_section;
787 unsigned int dynversym_section, dynverdef_section, dynverref_section;
788 file_ptr next_file_pos;
790 /* we don't need these inside bfd anymore, and I think
791 these weren't used outside bfd. */
792 void *prstatus; /* The raw /proc prstatus structure */
793 void *prpsinfo; /* The raw /proc prpsinfo structure */
795 bfd_vma gp; /* The gp value (MIPS only, for now) */
796 unsigned int gp_size; /* The gp size (MIPS only, for now) */
798 /* Information grabbed from an elf core file. */
805 /* This is set to true if the object was created by the backend
809 /* A mapping from external symbols to entries in the linker hash
810 table, used when linking. This is indexed by the symbol index
811 minus the sh_info field of the symbol table header. */
812 struct elf_link_hash_entry **sym_hashes;
814 /* A mapping from local symbols to offsets into the global offset
815 table, used when linking. This is indexed by the symbol index.
816 Like for the globals, we use a union and two names primarily to
817 document the intent of any particular piece of code. The field
818 should be used as a count until size_dynamic_sections, at which
819 point the contents of the .got is fixed. Afterward, if an entry
820 is -1, then the symbol does not require a global offset table entry. */
823 bfd_signed_vma *refcounts;
827 /* A mapping from local symbols to offsets into the various linker
828 sections added. This is index by the symbol index. */
829 elf_linker_section_pointers_t **linker_section_pointers;
831 /* The linker ELF emulation code needs to let the backend ELF linker
832 know what filename should be used for a dynamic object if the
833 dynamic object is found using a search. The emulation code then
834 sometimes needs to know what name was actually used. Until the
835 file has been added to the linker symbol table, this field holds
836 the name the linker wants. After it has been added, it holds the
837 name actually used, which will be the DT_SONAME entry if there is
841 /* Irix 5 often screws up the symbol table, sorting local symbols
842 after global symbols. This flag is set if the symbol table in
843 this BFD appears to be screwed up. If it is, we ignore the
844 sh_info field in the symbol table header, and always read all the
848 /* Records the result of `get_program_header_size'. */
849 bfd_size_type program_header_size;
851 /* Used by find_nearest_line entry point. */
854 /* Used by MIPS ELF find_nearest_line entry point. The structure
855 could be included directly in this one, but there's no point to
856 wasting the memory just for the infrequently called
857 find_nearest_line. */
858 struct mips_elf_find_line *find_line_info;
860 /* A place to stash dwarf1 info for this bfd. */
861 struct dwarf1_debug *dwarf1_find_line_info;
863 /* A place to stash dwarf2 info for this bfd. */
864 struct dwarf2_debug *dwarf2_find_line_info;
866 /* An array of stub sections indexed by symbol number, used by the
867 MIPS ELF linker. FIXME: We should figure out some way to only
868 include this field for a MIPS ELF target. */
869 asection **local_stubs;
871 /* Used to determine if the e_flags field has been initialized */
874 /* Number of symbol version definitions we are about to emit. */
875 unsigned int cverdefs;
877 /* Number of symbol version references we are about to emit. */
878 unsigned int cverrefs;
880 /* Symbol version definitions in external objects. */
881 Elf_Internal_Verdef *verdef;
883 /* Symbol version references to external objects. */
884 Elf_Internal_Verneed *verref;
886 /* Linker sections that we are interested in. */
887 struct elf_linker_section *linker_section[ (int)LINKER_SECTION_MAX ];
890 #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
891 #define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header)
892 #define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr)
893 #define elf_shstrtab(bfd) (elf_tdata(bfd) -> strtab_ptr)
894 #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section)
895 #define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section)
896 #define elf_dynversym(bfd) (elf_tdata(bfd) -> dynversym_section)
897 #define elf_dynverdef(bfd) (elf_tdata(bfd) -> dynverdef_section)
898 #define elf_dynverref(bfd) (elf_tdata(bfd) -> dynverref_section)
899 #define elf_num_locals(bfd) (elf_tdata(bfd) -> num_locals)
900 #define elf_num_globals(bfd) (elf_tdata(bfd) -> num_globals)
901 #define elf_section_syms(bfd) (elf_tdata(bfd) -> section_syms)
902 #define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
903 #define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
904 #define elf_gp(bfd) (elf_tdata(bfd) -> gp)
905 #define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size)
906 #define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes)
907 #define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts)
908 #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets)
909 #define elf_local_ptr_offsets(bfd) (elf_tdata(bfd) -> linker_section_pointers)
910 #define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name)
911 #define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab)
912 #define elf_flags_init(bfd) (elf_tdata(bfd) -> flags_init)
913 #define elf_linker_section(bfd,n) (elf_tdata(bfd) -> linker_section[(int)n])
915 extern void _bfd_elf_swap_verdef_in
916 PARAMS ((bfd *, const Elf_External_Verdef *, Elf_Internal_Verdef *));
917 extern void _bfd_elf_swap_verdef_out
918 PARAMS ((bfd *, const Elf_Internal_Verdef *, Elf_External_Verdef *));
919 extern void _bfd_elf_swap_verdaux_in
920 PARAMS ((bfd *, const Elf_External_Verdaux *, Elf_Internal_Verdaux *));
921 extern void _bfd_elf_swap_verdaux_out
922 PARAMS ((bfd *, const Elf_Internal_Verdaux *, Elf_External_Verdaux *));
923 extern void _bfd_elf_swap_verneed_in
924 PARAMS ((bfd *, const Elf_External_Verneed *, Elf_Internal_Verneed *));
925 extern void _bfd_elf_swap_verneed_out
926 PARAMS ((bfd *, const Elf_Internal_Verneed *, Elf_External_Verneed *));
927 extern void _bfd_elf_swap_vernaux_in
928 PARAMS ((bfd *, const Elf_External_Vernaux *, Elf_Internal_Vernaux *));
929 extern void _bfd_elf_swap_vernaux_out
930 PARAMS ((bfd *, const Elf_Internal_Vernaux *, Elf_External_Vernaux *));
931 extern void _bfd_elf_swap_versym_in
932 PARAMS ((bfd *, const Elf_External_Versym *, Elf_Internal_Versym *));
933 extern void _bfd_elf_swap_versym_out
934 PARAMS ((bfd *, const Elf_Internal_Versym *, Elf_External_Versym *));
936 extern int _bfd_elf_section_from_bfd_section PARAMS ((bfd *, asection *));
937 extern char *bfd_elf_string_from_elf_section
938 PARAMS ((bfd *, unsigned, unsigned));
939 extern char *bfd_elf_get_str_section PARAMS ((bfd *, unsigned));
941 extern boolean _bfd_elf_print_private_bfd_data PARAMS ((bfd *, PTR));
942 extern void bfd_elf_print_symbol PARAMS ((bfd *, PTR, asymbol *,
943 bfd_print_symbol_type));
944 #define elf_string_from_elf_strtab(abfd,strindex) \
945 bfd_elf_string_from_elf_section(abfd,elf_elfheader(abfd)->e_shstrndx,strindex)
947 #define bfd_elf32_print_symbol bfd_elf_print_symbol
948 #define bfd_elf64_print_symbol bfd_elf_print_symbol
950 extern unsigned long bfd_elf_hash PARAMS ((const char *));
952 extern bfd_reloc_status_type bfd_elf_generic_reloc PARAMS ((bfd *,
959 extern boolean bfd_elf_mkobject PARAMS ((bfd *));
960 extern boolean bfd_elf_mkcorefile PARAMS ((bfd *));
961 extern Elf_Internal_Shdr *bfd_elf_find_section PARAMS ((bfd *, char *));
962 extern boolean _bfd_elf_make_section_from_shdr
963 PARAMS ((bfd *abfd, Elf_Internal_Shdr *hdr, const char *name));
964 extern boolean _bfd_elf_make_section_from_phdr
965 PARAMS ((bfd *abfd, Elf_Internal_Phdr *hdr, int index, const char *typename));
966 extern struct bfd_hash_entry *_bfd_elf_link_hash_newfunc
967 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
968 extern struct bfd_link_hash_table *_bfd_elf_link_hash_table_create
970 extern void _bfd_elf_link_hash_copy_indirect
971 PARAMS ((struct elf_link_hash_entry *, struct elf_link_hash_entry *));
972 extern void _bfd_elf_link_hash_hide_symbol
973 PARAMS ((struct elf_link_hash_entry *));
974 extern boolean _bfd_elf_link_hash_table_init
975 PARAMS ((struct elf_link_hash_table *, bfd *,
976 struct bfd_hash_entry *(*) (struct bfd_hash_entry *,
977 struct bfd_hash_table *,
979 extern boolean _bfd_elf_slurp_version_tables PARAMS ((bfd *));
981 extern boolean _bfd_elf_copy_private_symbol_data
982 PARAMS ((bfd *, asymbol *, bfd *, asymbol *));
983 extern boolean _bfd_elf_copy_private_section_data
984 PARAMS ((bfd *, asection *, bfd *, asection *));
985 extern boolean _bfd_elf_write_object_contents PARAMS ((bfd *));
986 extern boolean _bfd_elf_write_corefile_contents PARAMS ((bfd *));
987 extern boolean _bfd_elf_set_section_contents PARAMS ((bfd *, sec_ptr, PTR,
990 extern long _bfd_elf_get_symtab_upper_bound PARAMS ((bfd *));
991 extern long _bfd_elf_get_symtab PARAMS ((bfd *, asymbol **));
992 extern long _bfd_elf_get_dynamic_symtab_upper_bound PARAMS ((bfd *));
993 extern long _bfd_elf_canonicalize_dynamic_symtab PARAMS ((bfd *, asymbol **));
994 extern long _bfd_elf_get_reloc_upper_bound PARAMS ((bfd *, sec_ptr));
995 extern long _bfd_elf_canonicalize_reloc PARAMS ((bfd *, sec_ptr,
996 arelent **, asymbol **));
997 extern long _bfd_elf_get_dynamic_reloc_upper_bound PARAMS ((bfd *));
998 extern long _bfd_elf_canonicalize_dynamic_reloc PARAMS ((bfd *, arelent **,
1000 extern asymbol *_bfd_elf_make_empty_symbol PARAMS ((bfd *));
1001 extern void _bfd_elf_get_symbol_info PARAMS ((bfd *, asymbol *,
1003 extern boolean _bfd_elf_is_local_label_name PARAMS ((bfd *, const char *));
1004 extern alent *_bfd_elf_get_lineno PARAMS ((bfd *, asymbol *));
1005 extern boolean _bfd_elf_set_arch_mach PARAMS ((bfd *, enum bfd_architecture,
1007 extern boolean _bfd_elf_find_nearest_line PARAMS ((bfd *, asection *,
1009 bfd_vma, CONST char **,
1012 #define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols
1013 #define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
1014 extern int _bfd_elf_sizeof_headers PARAMS ((bfd *, boolean));
1015 extern boolean _bfd_elf_new_section_hook PARAMS ((bfd *, asection *));
1016 extern boolean _bfd_elf_init_reloc_shdr
1017 PARAMS ((bfd *, Elf_Internal_Shdr *, asection *, boolean));
1019 /* If the target doesn't have reloc handling written yet: */
1020 extern void _bfd_elf_no_info_to_howto PARAMS ((bfd *, arelent *,
1021 Elf_Internal_Rela *));
1023 extern boolean bfd_section_from_shdr PARAMS ((bfd *, unsigned int shindex));
1024 extern boolean bfd_section_from_phdr PARAMS ((bfd *, Elf_Internal_Phdr *, int));
1026 extern int _bfd_elf_symbol_from_bfd_symbol PARAMS ((bfd *, asymbol **));
1028 asection *bfd_section_from_elf_index PARAMS ((bfd *, unsigned int));
1029 boolean _bfd_elf_create_dynamic_sections PARAMS ((bfd *,
1030 struct bfd_link_info *));
1031 struct bfd_strtab_hash *_bfd_elf_stringtab_init PARAMS ((void));
1033 _bfd_elf_link_record_dynamic_symbol PARAMS ((struct bfd_link_info *,
1034 struct elf_link_hash_entry *));
1036 _bfd_elf_link_lookup_local_dynindx PARAMS ((struct bfd_link_info *,
1039 _bfd_elf_compute_section_file_positions PARAMS ((bfd *,
1040 struct bfd_link_info *));
1041 void _bfd_elf_assign_file_positions_for_relocs PARAMS ((bfd *));
1042 file_ptr _bfd_elf_assign_file_position_for_section PARAMS ((Elf_Internal_Shdr *,
1046 extern boolean _bfd_elf_validate_reloc PARAMS ((bfd *, arelent *));
1048 boolean _bfd_elf_create_dynamic_sections PARAMS ((bfd *,
1049 struct bfd_link_info *));
1050 boolean _bfd_elf_create_got_section PARAMS ((bfd *,
1051 struct bfd_link_info *));
1052 unsigned long _bfd_elf_link_renumber_dynsyms PARAMS ((bfd *,
1053 struct bfd_link_info *));
1055 elf_linker_section_t *_bfd_elf_create_linker_section
1057 struct bfd_link_info *info,
1058 enum elf_linker_section_enum,
1059 elf_linker_section_t *defaults));
1061 elf_linker_section_pointers_t *_bfd_elf_find_pointer_linker_section
1062 PARAMS ((elf_linker_section_pointers_t *linker_pointers,
1063 bfd_signed_vma addend,
1064 elf_linker_section_enum_t which));
1066 boolean bfd_elf32_create_pointer_linker_section
1068 struct bfd_link_info *info,
1069 elf_linker_section_t *lsect,
1070 struct elf_link_hash_entry *h,
1071 const Elf32_Internal_Rela *rel));
1073 bfd_vma bfd_elf32_finish_pointer_linker_section
1074 PARAMS ((bfd *output_abfd,
1076 struct bfd_link_info *info,
1077 elf_linker_section_t *lsect,
1078 struct elf_link_hash_entry *h,
1080 const Elf32_Internal_Rela *rel,
1081 int relative_reloc));
1083 boolean bfd_elf64_create_pointer_linker_section
1085 struct bfd_link_info *info,
1086 elf_linker_section_t *lsect,
1087 struct elf_link_hash_entry *h,
1088 const Elf64_Internal_Rela *rel));
1090 bfd_vma bfd_elf64_finish_pointer_linker_section
1091 PARAMS ((bfd *output_abfd,
1093 struct bfd_link_info *info,
1094 elf_linker_section_t *lsect,
1095 struct elf_link_hash_entry *h,
1097 const Elf64_Internal_Rela *rel,
1098 int relative_reloc));
1100 boolean _bfd_elf_make_linker_section_rela
1101 PARAMS ((bfd *dynobj,
1102 elf_linker_section_t *lsect,
1105 boolean _bfd_elfcore_section_from_phdr
1106 PARAMS ((bfd *, Elf_Internal_Phdr *, int));
1108 extern const bfd_target *bfd_elf32_object_p PARAMS ((bfd *));
1109 extern const bfd_target *bfd_elf32_core_file_p PARAMS ((bfd *));
1110 extern char *bfd_elf32_core_file_failing_command PARAMS ((bfd *));
1111 extern int bfd_elf32_core_file_failing_signal PARAMS ((bfd *));
1112 extern boolean bfd_elf32_core_file_matches_executable_p PARAMS ((bfd *,
1115 extern boolean bfd_elf32_bfd_link_add_symbols
1116 PARAMS ((bfd *, struct bfd_link_info *));
1117 extern boolean bfd_elf32_bfd_final_link
1118 PARAMS ((bfd *, struct bfd_link_info *));
1120 extern void bfd_elf32_swap_symbol_in
1121 PARAMS ((bfd *, const Elf32_External_Sym *, Elf_Internal_Sym *));
1122 extern void bfd_elf32_swap_symbol_out
1123 PARAMS ((bfd *, const Elf_Internal_Sym *, PTR));
1124 extern void bfd_elf32_swap_reloc_in
1125 PARAMS ((bfd *, const Elf32_External_Rel *, Elf_Internal_Rel *));
1126 extern void bfd_elf32_swap_reloc_out
1127 PARAMS ((bfd *, const Elf_Internal_Rel *, Elf32_External_Rel *));
1128 extern void bfd_elf32_swap_reloca_in
1129 PARAMS ((bfd *, const Elf32_External_Rela *, Elf_Internal_Rela *));
1130 extern void bfd_elf32_swap_reloca_out
1131 PARAMS ((bfd *, const Elf_Internal_Rela *, Elf32_External_Rela *));
1132 extern void bfd_elf32_swap_phdr_in
1133 PARAMS ((bfd *, const Elf32_External_Phdr *, Elf_Internal_Phdr *));
1134 extern void bfd_elf32_swap_phdr_out
1135 PARAMS ((bfd *, const Elf_Internal_Phdr *, Elf32_External_Phdr *));
1136 extern void bfd_elf32_swap_dyn_in
1137 PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *));
1138 extern void bfd_elf32_swap_dyn_out
1139 PARAMS ((bfd *, const Elf_Internal_Dyn *, PTR));
1140 extern long bfd_elf32_slurp_symbol_table
1141 PARAMS ((bfd *, asymbol **, boolean));
1142 extern boolean bfd_elf32_write_shdrs_and_ehdr PARAMS ((bfd *));
1143 extern int bfd_elf32_write_out_phdrs
1144 PARAMS ((bfd *, const Elf_Internal_Phdr *, int));
1145 extern boolean bfd_elf32_add_dynamic_entry
1146 PARAMS ((struct bfd_link_info *, bfd_vma, bfd_vma));
1147 extern boolean bfd_elf32_link_create_dynamic_sections
1148 PARAMS ((bfd *, struct bfd_link_info *));
1149 extern Elf_Internal_Rela *_bfd_elf32_link_read_relocs
1150 PARAMS ((bfd *, asection *, PTR, Elf_Internal_Rela *, boolean));
1152 extern const bfd_target *bfd_elf64_object_p PARAMS ((bfd *));
1153 extern const bfd_target *bfd_elf64_core_file_p PARAMS ((bfd *));
1154 extern char *bfd_elf64_core_file_failing_command PARAMS ((bfd *));
1155 extern int bfd_elf64_core_file_failing_signal PARAMS ((bfd *));
1156 extern boolean bfd_elf64_core_file_matches_executable_p PARAMS ((bfd *,
1158 extern boolean bfd_elf64_bfd_link_add_symbols
1159 PARAMS ((bfd *, struct bfd_link_info *));
1160 extern boolean bfd_elf64_bfd_final_link
1161 PARAMS ((bfd *, struct bfd_link_info *));
1163 extern void bfd_elf64_swap_symbol_in
1164 PARAMS ((bfd *, const Elf64_External_Sym *, Elf_Internal_Sym *));
1165 extern void bfd_elf64_swap_symbol_out
1166 PARAMS ((bfd *, const Elf_Internal_Sym *, PTR));
1167 extern void bfd_elf64_swap_reloc_in
1168 PARAMS ((bfd *, const Elf64_External_Rel *, Elf_Internal_Rel *));
1169 extern void bfd_elf64_swap_reloc_out
1170 PARAMS ((bfd *, const Elf_Internal_Rel *, Elf64_External_Rel *));
1171 extern void bfd_elf64_swap_reloca_in
1172 PARAMS ((bfd *, const Elf64_External_Rela *, Elf_Internal_Rela *));
1173 extern void bfd_elf64_swap_reloca_out
1174 PARAMS ((bfd *, const Elf_Internal_Rela *, Elf64_External_Rela *));
1175 extern void bfd_elf64_swap_phdr_in
1176 PARAMS ((bfd *, const Elf64_External_Phdr *, Elf_Internal_Phdr *));
1177 extern void bfd_elf64_swap_phdr_out
1178 PARAMS ((bfd *, const Elf_Internal_Phdr *, Elf64_External_Phdr *));
1179 extern void bfd_elf64_swap_dyn_in
1180 PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *));
1181 extern void bfd_elf64_swap_dyn_out
1182 PARAMS ((bfd *, const Elf_Internal_Dyn *, PTR));
1183 extern long bfd_elf64_slurp_symbol_table
1184 PARAMS ((bfd *, asymbol **, boolean));
1185 extern boolean bfd_elf64_write_shdrs_and_ehdr PARAMS ((bfd *));
1186 extern int bfd_elf64_write_out_phdrs
1187 PARAMS ((bfd *, const Elf_Internal_Phdr *, int));
1188 extern boolean bfd_elf64_add_dynamic_entry
1189 PARAMS ((struct bfd_link_info *, bfd_vma, bfd_vma));
1190 extern boolean bfd_elf64_link_create_dynamic_sections
1191 PARAMS ((bfd *, struct bfd_link_info *));
1192 extern Elf_Internal_Rela *_bfd_elf64_link_read_relocs
1193 PARAMS ((bfd *, asection *, PTR, Elf_Internal_Rela *, boolean));
1195 #define bfd_elf32_link_record_dynamic_symbol \
1196 _bfd_elf_link_record_dynamic_symbol
1197 #define bfd_elf64_link_record_dynamic_symbol \
1198 _bfd_elf_link_record_dynamic_symbol
1200 boolean _bfd_elf32_link_record_local_dynamic_symbol
1201 PARAMS ((struct bfd_link_info *, bfd *, long));
1202 boolean _bfd_elf64_link_record_local_dynamic_symbol
1203 PARAMS ((struct bfd_link_info *, bfd *, long));
1205 extern boolean _bfd_elf_close_and_cleanup PARAMS ((bfd *));
1206 extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn
1207 PARAMS ((bfd *, arelent *, struct symbol_cache_entry *, PTR,
1208 asection *, bfd *, char **));
1210 boolean _bfd_elf32_gc_sections
1211 PARAMS ((bfd *abfd, struct bfd_link_info *info));
1212 boolean _bfd_elf32_gc_common_finalize_got_offsets
1213 PARAMS ((bfd *abfd, struct bfd_link_info *info));
1214 boolean _bfd_elf32_gc_common_final_link
1215 PARAMS ((bfd *, struct bfd_link_info *));
1216 boolean _bfd_elf32_gc_record_vtinherit
1217 PARAMS ((bfd *, asection *, struct elf_link_hash_entry *, bfd_vma));
1218 boolean _bfd_elf32_gc_record_vtentry
1219 PARAMS ((bfd *, asection *, struct elf_link_hash_entry *, bfd_vma));
1221 boolean _bfd_elf64_gc_sections
1222 PARAMS ((bfd *abfd, struct bfd_link_info *info));
1223 boolean _bfd_elf64_gc_common_finalize_got_offsets
1224 PARAMS ((bfd *abfd, struct bfd_link_info *info));
1225 boolean _bfd_elf64_gc_common_final_link
1226 PARAMS ((bfd *, struct bfd_link_info *));
1227 boolean _bfd_elf64_gc_record_vtinherit
1228 PARAMS ((bfd *, asection *, struct elf_link_hash_entry *, bfd_vma));
1229 boolean _bfd_elf64_gc_record_vtentry
1230 PARAMS ((bfd *, asection *, struct elf_link_hash_entry *, bfd_vma));
1232 /* MIPS ELF specific routines. */
1234 extern boolean _bfd_mips_elf_object_p PARAMS ((bfd *));
1235 extern boolean _bfd_mips_elf_section_from_shdr
1236 PARAMS ((bfd *, Elf_Internal_Shdr *, char *));
1237 extern boolean _bfd_mips_elf_fake_sections
1238 PARAMS ((bfd *, Elf_Internal_Shdr *, asection *));
1239 extern boolean _bfd_mips_elf_section_from_bfd_section
1240 PARAMS ((bfd *, Elf_Internal_Shdr *, asection *, int *));
1241 extern boolean _bfd_mips_elf_section_processing
1242 PARAMS ((bfd *, Elf_Internal_Shdr *));
1243 extern void _bfd_mips_elf_symbol_processing PARAMS ((bfd *, asymbol *));
1244 extern boolean _bfd_mips_elf_read_ecoff_info
1245 PARAMS ((bfd *, asection *, struct ecoff_debug_info *));
1246 extern void _bfd_mips_elf_final_write_processing PARAMS ((bfd *, boolean));
1247 extern bfd_reloc_status_type _bfd_mips_elf_hi16_reloc
1248 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
1249 extern bfd_reloc_status_type _bfd_mips_elf_lo16_reloc
1250 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
1251 extern bfd_reloc_status_type _bfd_mips_elf_gprel16_reloc
1252 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
1253 extern bfd_reloc_status_type _bfd_mips_elf_got16_reloc
1254 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
1255 extern bfd_reloc_status_type _bfd_mips_elf_gprel32_reloc
1256 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
1257 extern boolean _bfd_mips_elf_set_private_flags PARAMS ((bfd *, flagword));
1258 extern boolean _bfd_mips_elf_copy_private_bfd_data PARAMS ((bfd *, bfd *));
1259 extern boolean _bfd_mips_elf_merge_private_bfd_data PARAMS ((bfd *, bfd *));
1260 extern boolean _bfd_mips_elf_find_nearest_line
1261 PARAMS ((bfd *, asection *, asymbol **, bfd_vma, const char **,
1262 const char **, unsigned int *));
1263 extern boolean _bfd_mips_elf_set_section_contents
1264 PARAMS ((bfd *, asection *, PTR, file_ptr, bfd_size_type));
1265 extern boolean _bfd_mips_elf_create_dynamic_sections
1266 PARAMS ((bfd *, struct bfd_link_info *));
1267 extern boolean _bfd_mips_elf_add_symbol_hook
1268 PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *,
1269 const char **, flagword *, asection **, bfd_vma *));
1270 extern boolean _bfd_mips_elf_adjust_dynamic_symbol
1271 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
1272 extern boolean _bfd_mips_elf_finish_dynamic_symbol
1273 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
1274 Elf_Internal_Sym *));
1275 extern boolean _bfd_mips_elf_finish_dynamic_sections
1276 PARAMS ((bfd *, struct bfd_link_info *));
1277 extern asection * _bfd_mips_elf_gc_mark_hook
1278 PARAMS ((bfd *, struct bfd_link_info *, Elf_Internal_Rela *,
1279 struct elf_link_hash_entry *, Elf_Internal_Sym *));
1280 extern boolean _bfd_mips_elf_gc_sweep_hook
1281 PARAMS ((bfd *, struct bfd_link_info *, asection *,
1282 const Elf_Internal_Rela *));
1283 extern boolean _bfd_mips_elf_always_size_sections
1284 PARAMS ((bfd *, struct bfd_link_info *));
1285 extern boolean _bfd_mips_elf_size_dynamic_sections
1286 PARAMS ((bfd *, struct bfd_link_info *));
1287 extern boolean _bfd_mips_elf_check_relocs
1288 PARAMS ((bfd *, struct bfd_link_info *, asection *,
1289 const Elf_Internal_Rela *));
1290 extern struct bfd_link_hash_table *_bfd_mips_elf_link_hash_table_create
1292 extern boolean _bfd_mips_elf_print_private_bfd_data
1293 PARAMS ((bfd *, PTR));
1294 extern boolean _bfd_mips_elf_link_output_symbol_hook
1295 PARAMS ((bfd *, struct bfd_link_info *, const char *, Elf_Internal_Sym *,
1297 extern boolean _bfd_mips_elf_final_link
1298 PARAMS ((bfd *, struct bfd_link_info *));
1299 extern int _bfd_mips_elf_additional_program_headers PARAMS ((bfd *));
1300 extern boolean _bfd_mips_elf_modify_segment_map PARAMS ((bfd *));
1301 extern boolean _bfd_mips_elf_relocate_section
1302 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
1303 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
1305 /* SH ELF specific routine. */
1307 extern boolean _sh_elf_set_mach_from_flags PARAMS ((bfd *));
1309 #endif /* _LIBELF_H_ */