1 /* BFD back-end data structures for ELF files.
2 Copyright (C) 1992, 1993, 1994, 1995, 1996 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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
24 #include "elf/common.h"
25 #include "elf/internal.h"
26 #include "elf/external.h"
29 /* If size isn't specified as 64 or 32, NAME macro should fail. */
32 #define NAME(x,y) CAT4(x,64,_,y)
35 #define NAME(x,y) CAT4(x,32,_,y)
40 #define NAME(x,y) CAT4(x,NOSIZE,_,y)
43 #define ElfNAME(X) NAME(Elf,X)
44 #define elfNAME(X) NAME(elf,X)
46 /* Information held for an ELF symbol. The first field is the
47 corresponding asymbol. Every symbol is an ELF file is actually a
48 pointer to this structure, although it is often handled as a
49 pointer to an asymbol. */
55 /* ELF symbol information. */
56 Elf_Internal_Sym internal_elf_sym;
57 /* Backend specific information. */
60 unsigned int hppa_arg_reloc;
67 /* ELF linker hash table entries. */
69 struct elf_link_hash_entry
71 struct bfd_link_hash_entry root;
73 /* Symbol index in output file. This is initialized to -1. It is
74 set to -2 if the symbol is used by a reloc. */
80 /* Symbol index as a dynamic symbol. Initialized to -1, and remains
81 -1 if this is not a dynamic symbol. */
84 /* String table index in .dynstr if this is a dynamic symbol. */
85 unsigned long dynstr_index;
87 /* If this is a weak defined symbol from a dynamic object, this
88 field points to a defined symbol with the same value, if there is
89 one. Otherwise it is NULL. */
90 struct elf_link_hash_entry *weakdef;
92 /* If this symbol requires an entry in the global offset table, the
93 processor specific backend uses this field to hold the offset
94 into the .got section. If this field is -1, then the symbol does
95 not require a global offset table entry. */
98 /* If this symbol requires an entry in the procedure linkage table,
99 the processor specific backend uses these two fields to hold the
100 offset into the procedure linkage section and the offset into the
101 .got section. If plt_offset is -1, then the symbol does not
102 require an entry in the procedure linkage table. */
105 /* If this symbol is used in the linker created sections, the processor
106 specific backend uses this field to map the field into the offset
107 from the beginning of the section. */
108 struct elf_linker_section_pointers *linker_section_pointer;
110 /* Symbol type (STT_NOTYPE, STT_OBJECT, etc.). */
113 /* Symbol st_other value. */
116 /* Some flags; legal values follow. */
117 unsigned char elf_link_hash_flags;
118 /* Symbol is referenced by a non-shared object. */
119 #define ELF_LINK_HASH_REF_REGULAR 01
120 /* Symbol is defined by a non-shared object. */
121 #define ELF_LINK_HASH_DEF_REGULAR 02
122 /* Symbol is referenced by a shared object. */
123 #define ELF_LINK_HASH_REF_DYNAMIC 04
124 /* Symbol is defined by a shared object. */
125 #define ELF_LINK_HASH_DEF_DYNAMIC 010
126 /* Dynamic symbol has been adjustd. */
127 #define ELF_LINK_HASH_DYNAMIC_ADJUSTED 020
128 /* Symbol needs a copy reloc. */
129 #define ELF_LINK_HASH_NEEDS_COPY 040
130 /* Symbol needs a procedure linkage table entry. */
131 #define ELF_LINK_HASH_NEEDS_PLT 0100
132 /* Symbol appears in a non-ELF input file. */
133 #define ELF_LINK_NON_ELF 0200
134 /* Note: If you add more flags, you must change the type of
135 elf_link_hash_flags. */
138 /* ELF linker hash table. */
140 struct elf_link_hash_table
142 struct bfd_link_hash_table root;
143 /* Whether we have created the special dynamic sections required
144 when linking against or generating a shared object. */
145 boolean dynamic_sections_created;
146 /* The BFD used to hold special sections created by the linker.
147 This will be the first BFD found which requires these sections to
150 /* The number of symbols found in the link which must be put into
151 the .dynsym section. */
152 bfd_size_type dynsymcount;
153 /* The string table of dynamic symbols, which becomes the .dynstr
155 struct bfd_strtab_hash *dynstr;
156 /* The number of buckets in the hash table in the .hash section.
157 This is based on the number of dynamic symbols. */
158 bfd_size_type bucketcount;
159 /* A linked list of DT_NEEDED names found in dynamic objects
160 included in the link. */
161 struct bfd_link_needed_list *needed;
162 /* The _GLOBAL_OFFSET_TABLE_ symbol. */
163 struct elf_link_hash_entry *hgot;
164 /* A pointer to information used to link stabs in sections. */
168 /* Look up an entry in an ELF linker hash table. */
170 #define elf_link_hash_lookup(table, string, create, copy, follow) \
171 ((struct elf_link_hash_entry *) \
172 bfd_link_hash_lookup (&(table)->root, (string), (create), \
175 /* Traverse an ELF linker hash table. */
177 #define elf_link_hash_traverse(table, func, info) \
178 (bfd_link_hash_traverse \
180 (boolean (*) PARAMS ((struct bfd_link_hash_entry *, PTR))) (func), \
183 /* Get the ELF linker hash table from a link_info structure. */
185 #define elf_hash_table(p) ((struct elf_link_hash_table *) ((p)->hash))
187 /* Constant information held for an ELF backend. */
189 struct elf_size_info {
190 unsigned char sizeof_ehdr, sizeof_phdr, sizeof_shdr;
191 unsigned char sizeof_rel, sizeof_rela, sizeof_sym, sizeof_dyn, sizeof_note;
193 unsigned char arch_size, file_align;
194 unsigned char elfclass, ev_current;
195 int (*write_out_phdrs) PARAMS ((bfd *, const Elf_Internal_Phdr *, int));
196 boolean (*write_shdrs_and_ehdr) PARAMS ((bfd *));
197 void (*write_relocs) PARAMS ((bfd *, asection *, PTR));
198 void (*swap_symbol_out) PARAMS ((bfd *, const Elf_Internal_Sym *, PTR));
199 boolean (*slurp_reloc_table)
200 PARAMS ((bfd *, asection *, asymbol **, boolean));
201 long (*slurp_symbol_table) PARAMS ((bfd *, asymbol **, boolean));
202 void (*swap_dyn_in) PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *));
205 #define elf_symbol_from(ABFD,S) \
206 (((S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \
207 && (S)->the_bfd->tdata.elf_obj_data != 0) \
208 ? (elf_symbol_type *) (S) \
211 struct elf_backend_data
213 /* Whether the backend uses REL or RELA relocations. FIXME: some
214 ELF backends use both. When we need to support one, this whole
215 approach will need to be changed. */
218 /* The architecture for this backend. */
219 enum bfd_architecture arch;
221 /* The ELF machine code (EM_xxxx) for this backend. */
222 int elf_machine_code;
224 /* The maximum page size for this backend. */
227 /* This is true if the linker should act like collect and gather
228 global constructors and destructors by name. This is true for
229 MIPS ELF because the Irix 5 tools can not handle the .init
233 /* This is true if the linker should ignore changes to the type of a
234 symbol. This is true for MIPS ELF because some Irix 5 objects
235 record undefined functions as STT_OBJECT although the definitions
237 boolean type_change_ok;
239 /* A function to translate an ELF RELA relocation to a BFD arelent
241 void (*elf_info_to_howto) PARAMS ((bfd *, arelent *,
242 Elf_Internal_Rela *));
244 /* A function to translate an ELF REL relocation to a BFD arelent
246 void (*elf_info_to_howto_rel) PARAMS ((bfd *, arelent *,
247 Elf_Internal_Rel *));
249 /* A function to determine whether a symbol is global when
250 partitioning the symbol table into local and global symbols.
251 This should be NULL for most targets, in which case the correct
252 thing will be done. MIPS ELF, at least on the Irix 5, has
253 special requirements. */
254 boolean (*elf_backend_sym_is_global) PARAMS ((bfd *, asymbol *));
256 /* The remaining functions are hooks which are called only if they
259 /* A function to permit a backend specific check on whether a
260 particular BFD format is relevant for an object file, and to
261 permit the backend to set any global information it wishes. When
262 this is called elf_elfheader is set, but anything else should be
263 used with caution. If this returns false, the check_format
264 routine will return a bfd_error_wrong_format error. */
265 boolean (*elf_backend_object_p) PARAMS ((bfd *));
267 /* A function to do additional symbol processing when reading the
268 ELF symbol table. This is where any processor-specific special
269 section indices are handled. */
270 void (*elf_backend_symbol_processing) PARAMS ((bfd *, asymbol *));
272 /* A function to do additional symbol processing after reading the
273 entire ELF symbol table. */
274 boolean (*elf_backend_symbol_table_processing) PARAMS ((bfd *,
278 /* A function to do additional processing on the ELF section header
279 just before writing it out. This is used to set the flags and
280 type fields for some sections, or to actually write out data for
282 boolean (*elf_backend_section_processing) PARAMS ((bfd *,
283 Elf32_Internal_Shdr *));
285 /* A function to handle unusual section types when creating BFD
286 sections from ELF sections. */
287 boolean (*elf_backend_section_from_shdr) PARAMS ((bfd *,
288 Elf32_Internal_Shdr *,
291 /* A function to set up the ELF section header for a BFD section in
292 preparation for writing it out. This is where the flags and type
293 fields are set for unusual sections. */
294 boolean (*elf_backend_fake_sections) PARAMS ((bfd *, Elf32_Internal_Shdr *,
297 /* A function to get the ELF section index for a BFD section. If
298 this returns true, the section was found. If it is a normal ELF
299 section, *RETVAL should be left unchanged. If it is not a normal
300 ELF section *RETVAL should be set to the SHN_xxxx index. */
301 boolean (*elf_backend_section_from_bfd_section)
302 PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *, int *retval));
304 /* If this field is not NULL, it is called by the add_symbols phase
305 of a link just before adding a symbol to the global linker hash
306 table. It may modify any of the fields as it wishes. If *NAME
307 is set to NULL, the symbol will be skipped rather than being
308 added to the hash table. This function is responsible for
309 handling all processor dependent symbol bindings and section
310 indices, and must set at least *FLAGS and *SEC for each processor
311 dependent case; failure to do so will cause a link error. */
312 boolean (*elf_add_symbol_hook)
313 PARAMS ((bfd *abfd, struct bfd_link_info *info,
314 const Elf_Internal_Sym *, const char **name,
315 flagword *flags, asection **sec, bfd_vma *value));
317 /* If this field is not NULL, it is called by the elf_link_output_sym
318 phase of a link for each symbol which will appear in the object file. */
319 boolean (*elf_backend_link_output_symbol_hook)
320 PARAMS ((bfd *, struct bfd_link_info *info, const char *,
321 Elf_Internal_Sym *, asection *));
323 /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend
324 linker the first time it encounters a dynamic object in the link.
325 This function must create any sections required for dynamic
326 linking. The ABFD argument is a dynamic object. The .interp,
327 .dynamic, .dynsym, .dynstr, and .hash functions have already been
328 created, and this function may modify the section flags if
329 desired. This function will normally create the .got and .plt
330 sections, but different backends have different requirements. */
331 boolean (*elf_backend_create_dynamic_sections)
332 PARAMS ((bfd *abfd, struct bfd_link_info *info));
334 /* The CHECK_RELOCS function is called by the add_symbols phase of
335 the ELF backend linker. It is called once for each section with
336 relocs of an object file, just after the symbols for the object
337 file have been added to the global linker hash table. The
338 function must look through the relocs and do any special handling
339 required. This generally means allocating space in the global
340 offset table, and perhaps allocating space for a reloc. The
341 relocs are always passed as Rela structures; if the section
342 actually uses Rel structures, the r_addend field will always be
344 boolean (*check_relocs)
345 PARAMS ((bfd *abfd, struct bfd_link_info *info, asection *o,
346 const Elf_Internal_Rela *relocs));
348 /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
349 linker for every symbol which is defined by a dynamic object and
350 referenced by a regular object. This is called after all the
351 input files have been seen, but before the SIZE_DYNAMIC_SECTIONS
352 function has been called. The hash table entry should be
353 bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be
354 defined in a section from a dynamic object. Dynamic object
355 sections are not included in the final link, and this function is
356 responsible for changing the value to something which the rest of
357 the link can deal with. This will normally involve adding an
358 entry to the .plt or .got or some such section, and setting the
359 symbol to point to that. */
360 boolean (*elf_backend_adjust_dynamic_symbol)
361 PARAMS ((struct bfd_link_info *info, struct elf_link_hash_entry *h));
363 /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker
364 after all the linker input files have been seen but before the
365 section sizes have been set. This is called after
366 ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS. */
367 boolean (*elf_backend_always_size_sections)
368 PARAMS ((bfd *output_bfd, struct bfd_link_info *info));
370 /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend
371 linker after all the linker input files have been seen but before
372 the sections sizes have been set. This is called after
373 ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols.
374 It is only called when linking against a dynamic object. It must
375 set the sizes of the dynamic sections, and may fill in their
376 contents as well. The generic ELF linker can handle the .dynsym,
377 .dynstr and .hash sections. This function must handle the
378 .interp section and any sections created by the
379 CREATE_DYNAMIC_SECTIONS entry point. */
380 boolean (*elf_backend_size_dynamic_sections)
381 PARAMS ((bfd *output_bfd, struct bfd_link_info *info));
383 /* The RELOCATE_SECTION function is called by the ELF backend linker
384 to handle the relocations for a section.
386 The relocs are always passed as Rela structures; if the section
387 actually uses Rel structures, the r_addend field will always be
390 This function is responsible for adjust the section contents as
391 necessary, and (if using Rela relocs and generating a
392 relocateable output file) adjusting the reloc addend as
395 This function does not have to worry about setting the reloc
396 address or the reloc symbol index.
398 LOCAL_SYMS is a pointer to the swapped in local symbols.
400 LOCAL_SECTIONS is an array giving the section in the input file
401 corresponding to the st_shndx field of each local symbol.
403 The global hash table entry for the global symbols can be found
404 via elf_sym_hashes (input_bfd).
406 When generating relocateable output, this function must handle
407 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
408 going to be the section symbol corresponding to the output
409 section, which means that the addend must be adjusted
411 boolean (*elf_backend_relocate_section)
412 PARAMS ((bfd *output_bfd, struct bfd_link_info *info,
413 bfd *input_bfd, asection *input_section, bfd_byte *contents,
414 Elf_Internal_Rela *relocs, Elf_Internal_Sym *local_syms,
415 asection **local_sections));
417 /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend
418 linker just before it writes a symbol out to the .dynsym section.
419 The processor backend may make any required adjustment to the
420 symbol. It may also take the opportunity to set contents of the
421 dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on
422 all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called
423 on those symbols which are defined by a dynamic object. */
424 boolean (*elf_backend_finish_dynamic_symbol)
425 PARAMS ((bfd *output_bfd, struct bfd_link_info *info,
426 struct elf_link_hash_entry *h, Elf_Internal_Sym *sym));
428 /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend
429 linker just before it writes all the dynamic sections out to the
430 output file. The FINISH_DYNAMIC_SYMBOL will have been called on
431 all dynamic symbols. */
432 boolean (*elf_backend_finish_dynamic_sections)
433 PARAMS ((bfd *output_bfd, struct bfd_link_info *info));
435 /* A function to do any beginning processing needed for the ELF file
436 before building the ELF headers and computing file positions. */
437 void (*elf_backend_begin_write_processing)
438 PARAMS ((bfd *, struct bfd_link_info *));
440 /* A function to do any final processing needed for the ELF file
441 before writing it out. The LINKER argument is true if this BFD
442 was created by the ELF backend linker. */
443 void (*elf_backend_final_write_processing)
444 PARAMS ((bfd *, boolean linker));
446 /* This function is called by get_program_header_size. It should
447 return the number of additional program segments which this BFD
448 will need. It should return -1 on error. */
449 int (*elf_backend_additional_program_headers) PARAMS ((bfd *));
451 /* This function is called to modify an existing segment map in a
452 backend specific fashion. */
453 boolean (*elf_backend_modify_segment_map) PARAMS ((bfd *));
455 /* The swapping table to use when dealing with ECOFF information.
456 Used for the MIPS ELF .mdebug section. */
457 const struct ecoff_debug_swap *elf_backend_ecoff_debug_swap;
459 /* Alternate EM_xxxx machine codes for this backend. */
460 int elf_machine_alt1;
461 int elf_machine_alt2;
463 const struct elf_size_info *s;
465 unsigned want_got_plt : 1;
466 unsigned plt_readonly : 1;
467 unsigned want_plt_sym : 1;
470 /* Information stored for each BFD section in an ELF file. This
471 structure is allocated by elf_new_section_hook. */
473 struct bfd_elf_section_data
475 /* The ELF header for this section. */
476 Elf_Internal_Shdr this_hdr;
477 /* The ELF header for the reloc section associated with this
479 Elf_Internal_Shdr rel_hdr;
480 /* If there is a second reloc section associated with this section,
481 as can happen on Irix 6, this field points to the header. */
482 Elf_Internal_Shdr *rel_hdr2;
483 /* The ELF section number of this section. Only used for an output
486 /* The ELF section number of the reloc section associated with this
487 section, if any. Only used for an output file. */
489 /* Used by the backend linker to store the symbol hash table entries
490 associated with relocs against global symbols. */
491 struct elf_link_hash_entry **rel_hashes;
492 /* A pointer to the swapped relocs. If the section uses REL relocs,
493 rather than RELA, all the r_addend fields will be zero. This
494 pointer may be NULL. It is used by the backend linker. */
495 Elf_Internal_Rela *relocs;
496 /* Used by the backend linker when generating a shared library to
497 record the dynamic symbol index for a section symbol
498 corresponding to this section. */
500 /* A pointer used for .stab linking optimizations. */
502 /* A pointer available for the processor specific ELF backend. */
506 #define elf_section_data(sec) ((struct bfd_elf_section_data*)sec->used_by_bfd)
508 #define get_elf_backend_data(abfd) \
509 ((struct elf_backend_data *) (abfd)->xvec->backend_data)
511 /* Enumeration to specify the special section. */
512 typedef enum elf_linker_section_enum
514 LINKER_SECTION_UNKNOWN, /* not used */
515 LINKER_SECTION_GOT, /* .got section for global offset pointers */
516 LINKER_SECTION_PLT, /* .plt section for generated procedure stubs */
517 LINKER_SECTION_SDATA, /* .sdata/.sbss section for PowerPC */
518 LINKER_SECTION_SDATA2, /* .sdata2/.sbss2 section for PowerPC */
519 LINKER_SECTION_MAX /* # of linker sections */
520 } elf_linker_section_enum_t;
522 /* Sections created by the linker. */
524 typedef struct elf_linker_section
526 char *name; /* name of the section */
527 char *rel_name; /* name of the associated .rel{,a}. section */
528 char *bss_name; /* name of a related .bss section */
529 char *sym_name; /* name of symbol to reference this section */
530 asection *section; /* pointer to the section */
531 asection *bss_section; /* pointer to the bss section associated with this */
532 asection *rel_section; /* pointer to the relocations needed for this section */
533 struct elf_link_hash_entry *sym_hash; /* pointer to the created symbol hash value */
534 bfd_vma initial_size; /* initial size before any linker generated allocations */
535 bfd_vma sym_offset; /* offset of symbol from beginning of section */
536 bfd_vma hole_size; /* size of reserved address hole in allocation */
537 bfd_vma hole_offset; /* current offset for the hole */
538 bfd_vma max_hole_offset; /* maximum offset for the hole */
539 elf_linker_section_enum_t which; /* which section this is */
540 boolean hole_written_p; /* whether the hole has been initialized */
541 int alignment; /* alignment for the section */
542 flagword flags; /* flags to use to create the section */
543 } elf_linker_section_t;
545 /* Linked list of allocated pointer entries. This hangs off of the symbol lists, and
546 provides allows us to return different pointers, based on different addend's. */
548 typedef struct elf_linker_section_pointers
550 struct elf_linker_section_pointers *next; /* next allocated pointer for this symbol */
551 bfd_vma offset; /* offset of pointer from beginning of section */
552 bfd_signed_vma addend; /* addend used */
553 elf_linker_section_enum_t which; /* which linker section this is */
554 boolean written_address_p; /* whether address was written yet */
555 } elf_linker_section_pointers_t;
557 /* Some private data is stashed away for future use using the tdata pointer
558 in the bfd structure. */
562 Elf_Internal_Ehdr elf_header[1]; /* Actual data, but ref like ptr */
563 Elf_Internal_Shdr **elf_sect_ptr;
564 Elf_Internal_Phdr *phdr;
565 struct elf_segment_map *segment_map;
566 struct bfd_strtab_hash *strtab_ptr;
569 asymbol **section_syms; /* STT_SECTION symbols for each section */
570 Elf_Internal_Shdr symtab_hdr;
571 Elf_Internal_Shdr shstrtab_hdr;
572 Elf_Internal_Shdr strtab_hdr;
573 Elf_Internal_Shdr dynsymtab_hdr;
574 Elf_Internal_Shdr dynstrtab_hdr;
575 unsigned int symtab_section, shstrtab_section;
576 unsigned int strtab_section, dynsymtab_section;
577 file_ptr next_file_pos;
578 void *prstatus; /* The raw /proc prstatus structure */
579 void *prpsinfo; /* The raw /proc prpsinfo structure */
580 bfd_vma gp; /* The gp value (MIPS only, for now) */
581 unsigned int gp_size; /* The gp size (MIPS only, for now) */
583 /* This is set to true if the object was created by the backend
587 /* A mapping from external symbols to entries in the linker hash
588 table, used when linking. This is indexed by the symbol index
589 minus the sh_info field of the symbol table header. */
590 struct elf_link_hash_entry **sym_hashes;
592 /* A mapping from local symbols to offsets into the global offset
593 table, used when linking. This is indexed by the symbol index. */
594 bfd_vma *local_got_offsets;
596 /* A mapping from local symbols to offsets into the various linker
597 sections added. This is index by the symbol index. */
598 elf_linker_section_pointers_t **linker_section_pointers;
600 /* The linker ELF emulation code needs to let the backend ELF linker
601 know what filename should be used for a dynamic object if the
602 dynamic object is found using a search. The emulation code then
603 sometimes needs to know what name was actually used. Until the
604 file has been added to the linker symbol table, this field holds
605 the name the linker wants. After it has been added, it holds the
606 name actually used, which will be the DT_SONAME entry if there is
610 /* Irix 5 often screws up the symbol table, sorting local symbols
611 after global symbols. This flag is set if the symbol table in
612 this BFD appears to be screwed up. If it is, we ignore the
613 sh_info field in the symbol table header, and always read all the
617 /* Records the result of `get_program_header_size'. */
618 bfd_size_type program_header_size;
620 /* Used by find_nearest_line entry point. */
623 /* Used by MIPS ELF find_nearest_line entry point. The structure
624 could be included directly in this one, but there's no point to
625 wasting the memory just for the infrequently called
626 find_nearest_line. */
627 struct mips_elf_find_line *find_line_info;
629 /* Used to determine if the e_flags field has been initialized */
632 /* Linker sections that we are interested in. */
633 struct elf_linker_section *linker_section[ (int)LINKER_SECTION_MAX ];
636 #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
637 #define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header)
638 #define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr)
639 #define elf_shstrtab(bfd) (elf_tdata(bfd) -> strtab_ptr)
640 #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section)
641 #define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section)
642 #define elf_num_locals(bfd) (elf_tdata(bfd) -> num_locals)
643 #define elf_num_globals(bfd) (elf_tdata(bfd) -> num_globals)
644 #define elf_section_syms(bfd) (elf_tdata(bfd) -> section_syms)
645 #define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
646 #define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
647 #define elf_gp(bfd) (elf_tdata(bfd) -> gp)
648 #define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size)
649 #define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes)
650 #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got_offsets)
651 #define elf_local_ptr_offsets(bfd) (elf_tdata(bfd) -> linker_section_pointers)
652 #define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name)
653 #define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab)
654 #define elf_flags_init(bfd) (elf_tdata(bfd) -> flags_init)
655 #define elf_linker_section(bfd,n) (elf_tdata(bfd) -> linker_section[(int)n])
657 extern int _bfd_elf_section_from_bfd_section PARAMS ((bfd *, asection *));
658 extern char *bfd_elf_string_from_elf_section
659 PARAMS ((bfd *, unsigned, unsigned));
660 extern char *bfd_elf_get_str_section PARAMS ((bfd *, unsigned));
662 extern boolean _bfd_elf_print_private_bfd_data PARAMS ((bfd *, PTR));
663 extern void bfd_elf_print_symbol PARAMS ((bfd *, PTR, asymbol *,
664 bfd_print_symbol_type));
665 #define elf_string_from_elf_strtab(abfd,strindex) \
666 bfd_elf_string_from_elf_section(abfd,elf_elfheader(abfd)->e_shstrndx,strindex)
668 #define bfd_elf32_print_symbol bfd_elf_print_symbol
669 #define bfd_elf64_print_symbol bfd_elf_print_symbol
671 extern unsigned long bfd_elf_hash PARAMS ((CONST unsigned char *));
673 extern bfd_reloc_status_type bfd_elf_generic_reloc PARAMS ((bfd *,
680 extern boolean bfd_elf_mkobject PARAMS ((bfd *));
681 extern Elf_Internal_Shdr *bfd_elf_find_section PARAMS ((bfd *, char *));
682 extern boolean _bfd_elf_make_section_from_shdr
683 PARAMS ((bfd *abfd, Elf_Internal_Shdr *hdr, const char *name));
684 extern struct bfd_hash_entry *_bfd_elf_link_hash_newfunc
685 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
686 extern struct bfd_link_hash_table *_bfd_elf_link_hash_table_create
688 extern boolean _bfd_elf_link_hash_table_init
689 PARAMS ((struct elf_link_hash_table *, bfd *,
690 struct bfd_hash_entry *(*) (struct bfd_hash_entry *,
691 struct bfd_hash_table *,
694 extern boolean _bfd_elf_copy_private_symbol_data
695 PARAMS ((bfd *, asymbol *, bfd *, asymbol *));
696 extern boolean _bfd_elf_copy_private_section_data
697 PARAMS ((bfd *, asection *, bfd *, asection *));
698 extern boolean _bfd_elf_write_object_contents PARAMS ((bfd *));
699 extern boolean _bfd_elf_set_section_contents PARAMS ((bfd *, sec_ptr, PTR,
702 extern long _bfd_elf_get_symtab_upper_bound PARAMS ((bfd *));
703 extern long _bfd_elf_get_symtab PARAMS ((bfd *, asymbol **));
704 extern long _bfd_elf_get_dynamic_symtab_upper_bound PARAMS ((bfd *));
705 extern long _bfd_elf_canonicalize_dynamic_symtab PARAMS ((bfd *, asymbol **));
706 extern long _bfd_elf_get_reloc_upper_bound PARAMS ((bfd *, sec_ptr));
707 extern long _bfd_elf_canonicalize_reloc PARAMS ((bfd *, sec_ptr,
708 arelent **, asymbol **));
709 extern long _bfd_elf_get_dynamic_reloc_upper_bound PARAMS ((bfd *));
710 extern long _bfd_elf_canonicalize_dynamic_reloc PARAMS ((bfd *, arelent **,
712 extern asymbol *_bfd_elf_make_empty_symbol PARAMS ((bfd *));
713 extern void _bfd_elf_get_symbol_info PARAMS ((bfd *, asymbol *,
715 extern alent *_bfd_elf_get_lineno PARAMS ((bfd *, asymbol *));
716 extern boolean _bfd_elf_set_arch_mach PARAMS ((bfd *, enum bfd_architecture,
718 extern boolean _bfd_elf_find_nearest_line PARAMS ((bfd *, asection *,
720 bfd_vma, CONST char **,
723 #define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols
724 #define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
725 extern int _bfd_elf_sizeof_headers PARAMS ((bfd *, boolean));
726 extern boolean _bfd_elf_new_section_hook PARAMS ((bfd *, asection *));
728 /* If the target doesn't have reloc handling written yet: */
729 extern void _bfd_elf_no_info_to_howto PARAMS ((bfd *, arelent *,
730 Elf_Internal_Rela *));
732 extern boolean bfd_section_from_shdr PARAMS ((bfd *, unsigned int shindex));
733 extern boolean bfd_section_from_phdr PARAMS ((bfd *, Elf_Internal_Phdr *, int));
735 extern int _bfd_elf_symbol_from_bfd_symbol PARAMS ((bfd *, asymbol **));
737 asection *bfd_section_from_elf_index PARAMS ((bfd *, unsigned int));
738 boolean _bfd_elf_create_dynamic_sections PARAMS ((bfd *,
739 struct bfd_link_info *));
740 struct bfd_strtab_hash *_bfd_elf_stringtab_init PARAMS ((void));
742 _bfd_elf_link_record_dynamic_symbol PARAMS ((struct bfd_link_info *,
743 struct elf_link_hash_entry *));
745 _bfd_elf_compute_section_file_positions PARAMS ((bfd *,
746 struct bfd_link_info *));
747 void _bfd_elf_assign_file_positions_for_relocs PARAMS ((bfd *));
748 file_ptr _bfd_elf_assign_file_position_for_section PARAMS ((Elf_Internal_Shdr *,
752 extern boolean _bfd_elf_validate_reloc PARAMS ((bfd *, arelent *));
754 boolean _bfd_elf_create_dynamic_sections PARAMS ((bfd *,
755 struct bfd_link_info *));
756 boolean _bfd_elf_create_got_section PARAMS ((bfd *,
757 struct bfd_link_info *));
759 elf_linker_section_t *_bfd_elf_create_linker_section
761 struct bfd_link_info *info,
762 enum elf_linker_section_enum,
763 elf_linker_section_t *defaults));
765 elf_linker_section_pointers_t *_bfd_elf_find_pointer_linker_section
766 PARAMS ((elf_linker_section_pointers_t *linker_pointers,
767 bfd_signed_vma addend,
768 elf_linker_section_enum_t which));
770 boolean bfd_elf32_create_pointer_linker_section
772 struct bfd_link_info *info,
773 elf_linker_section_t *lsect,
774 struct elf_link_hash_entry *h,
775 const Elf32_Internal_Rela *rel));
777 bfd_vma bfd_elf32_finish_pointer_linker_section
778 PARAMS ((bfd *output_abfd,
780 struct bfd_link_info *info,
781 elf_linker_section_t *lsect,
782 struct elf_link_hash_entry *h,
784 const Elf32_Internal_Rela *rel,
785 int relative_reloc));
787 boolean bfd_elf64_create_pointer_linker_section
789 struct bfd_link_info *info,
790 elf_linker_section_t *lsect,
791 struct elf_link_hash_entry *h,
792 const Elf64_Internal_Rela *rel));
794 bfd_vma bfd_elf64_finish_pointer_linker_section
795 PARAMS ((bfd *output_abfd,
797 struct bfd_link_info *info,
798 elf_linker_section_t *lsect,
799 struct elf_link_hash_entry *h,
801 const Elf64_Internal_Rela *rel,
802 int relative_reloc));
804 boolean _bfd_elf_make_linker_section_rela
805 PARAMS ((bfd *dynobj,
806 elf_linker_section_t *lsect,
809 extern const bfd_target *bfd_elf32_object_p PARAMS ((bfd *));
810 extern const bfd_target *bfd_elf32_core_file_p PARAMS ((bfd *));
811 extern char *bfd_elf32_core_file_failing_command PARAMS ((bfd *));
812 extern int bfd_elf32_core_file_failing_signal PARAMS ((bfd *));
813 extern boolean bfd_elf32_core_file_matches_executable_p PARAMS ((bfd *,
816 extern boolean bfd_elf32_bfd_link_add_symbols
817 PARAMS ((bfd *, struct bfd_link_info *));
818 extern boolean bfd_elf32_bfd_final_link
819 PARAMS ((bfd *, struct bfd_link_info *));
821 extern void bfd_elf32_swap_symbol_in
822 PARAMS ((bfd *, const Elf32_External_Sym *, Elf_Internal_Sym *));
823 extern void bfd_elf32_swap_symbol_out
824 PARAMS ((bfd *, const Elf_Internal_Sym *, PTR));
825 extern void bfd_elf32_swap_reloc_in
826 PARAMS ((bfd *, const Elf32_External_Rel *, Elf_Internal_Rel *));
827 extern void bfd_elf32_swap_reloc_out
828 PARAMS ((bfd *, const Elf_Internal_Rel *, Elf32_External_Rel *));
829 extern void bfd_elf32_swap_reloca_in
830 PARAMS ((bfd *, const Elf32_External_Rela *, Elf_Internal_Rela *));
831 extern void bfd_elf32_swap_reloca_out
832 PARAMS ((bfd *, const Elf_Internal_Rela *, Elf32_External_Rela *));
833 extern void bfd_elf32_swap_phdr_in
834 PARAMS ((bfd *, const Elf32_External_Phdr *, Elf_Internal_Phdr *));
835 extern void bfd_elf32_swap_phdr_out
836 PARAMS ((bfd *, const Elf_Internal_Phdr *, Elf32_External_Phdr *));
837 extern void bfd_elf32_swap_dyn_in
838 PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *));
839 extern void bfd_elf32_swap_dyn_out
840 PARAMS ((bfd *, const Elf_Internal_Dyn *, Elf32_External_Dyn *));
841 extern long bfd_elf32_slurp_symbol_table
842 PARAMS ((bfd *, asymbol **, boolean));
843 extern boolean bfd_elf32_write_shdrs_and_ehdr PARAMS ((bfd *));
844 extern int bfd_elf32_write_out_phdrs
845 PARAMS ((bfd *, const Elf_Internal_Phdr *, int));
846 extern boolean bfd_elf32_add_dynamic_entry
847 PARAMS ((struct bfd_link_info *, bfd_vma, bfd_vma));
848 extern boolean bfd_elf32_link_create_dynamic_sections
849 PARAMS ((bfd *, struct bfd_link_info *));
850 extern Elf_Internal_Rela *_bfd_elf32_link_read_relocs
851 PARAMS ((bfd *, asection *, PTR, Elf_Internal_Rela *, boolean));
853 extern const bfd_target *bfd_elf64_object_p PARAMS ((bfd *));
854 extern const bfd_target *bfd_elf64_core_file_p PARAMS ((bfd *));
855 extern char *bfd_elf64_core_file_failing_command PARAMS ((bfd *));
856 extern int bfd_elf64_core_file_failing_signal PARAMS ((bfd *));
857 extern boolean bfd_elf64_core_file_matches_executable_p PARAMS ((bfd *,
859 extern boolean bfd_elf64_bfd_link_add_symbols
860 PARAMS ((bfd *, struct bfd_link_info *));
861 extern boolean bfd_elf64_bfd_final_link
862 PARAMS ((bfd *, struct bfd_link_info *));
864 extern void bfd_elf64_swap_symbol_in
865 PARAMS ((bfd *, const Elf64_External_Sym *, Elf_Internal_Sym *));
866 extern void bfd_elf64_swap_symbol_out
867 PARAMS ((bfd *, const Elf_Internal_Sym *, PTR));
868 extern void bfd_elf64_swap_reloc_in
869 PARAMS ((bfd *, const Elf64_External_Rel *, Elf_Internal_Rel *));
870 extern void bfd_elf64_swap_reloc_out
871 PARAMS ((bfd *, const Elf_Internal_Rel *, Elf64_External_Rel *));
872 extern void bfd_elf64_swap_reloca_in
873 PARAMS ((bfd *, const Elf64_External_Rela *, Elf_Internal_Rela *));
874 extern void bfd_elf64_swap_reloca_out
875 PARAMS ((bfd *, const Elf_Internal_Rela *, Elf64_External_Rela *));
876 extern void bfd_elf64_swap_phdr_in
877 PARAMS ((bfd *, const Elf64_External_Phdr *, Elf_Internal_Phdr *));
878 extern void bfd_elf64_swap_phdr_out
879 PARAMS ((bfd *, const Elf_Internal_Phdr *, Elf64_External_Phdr *));
880 extern void bfd_elf64_swap_dyn_in
881 PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *));
882 extern void bfd_elf64_swap_dyn_out
883 PARAMS ((bfd *, const Elf_Internal_Dyn *, Elf64_External_Dyn *));
884 extern long bfd_elf64_slurp_symbol_table
885 PARAMS ((bfd *, asymbol **, boolean));
886 extern boolean bfd_elf64_write_shdrs_and_ehdr PARAMS ((bfd *));
887 extern int bfd_elf64_write_out_phdrs
888 PARAMS ((bfd *, const Elf_Internal_Phdr *, int));
889 extern boolean bfd_elf64_add_dynamic_entry
890 PARAMS ((struct bfd_link_info *, bfd_vma, bfd_vma));
891 extern boolean bfd_elf64_link_create_dynamic_sections
892 PARAMS ((bfd *, struct bfd_link_info *));
893 extern Elf_Internal_Rela *_bfd_elf64_link_read_relocs
894 PARAMS ((bfd *, asection *, PTR, Elf_Internal_Rela *, boolean));
896 #define bfd_elf32_link_record_dynamic_symbol _bfd_elf_link_record_dynamic_symbol
897 #define bfd_elf64_link_record_dynamic_symbol _bfd_elf_link_record_dynamic_symbol
899 /* MIPS ELF specific routines. */
901 extern boolean _bfd_mips_elf_object_p PARAMS ((bfd *));
902 extern boolean _bfd_mips_elf_section_from_shdr
903 PARAMS ((bfd *, Elf_Internal_Shdr *, const char *));
904 extern boolean _bfd_mips_elf_fake_sections
905 PARAMS ((bfd *, Elf_Internal_Shdr *, asection *));
906 extern boolean _bfd_mips_elf_section_from_bfd_section
907 PARAMS ((bfd *, Elf_Internal_Shdr *, asection *, int *));
908 extern boolean _bfd_mips_elf_section_processing
909 PARAMS ((bfd *, Elf_Internal_Shdr *));
910 extern void _bfd_mips_elf_symbol_processing PARAMS ((bfd *, asymbol *));
911 extern boolean _bfd_mips_elf_read_ecoff_info
912 PARAMS ((bfd *, asection *, struct ecoff_debug_info *));
913 extern void _bfd_mips_elf_final_write_processing PARAMS ((bfd *, boolean));
914 extern bfd_reloc_status_type _bfd_mips_elf_hi16_reloc
915 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
916 extern bfd_reloc_status_type _bfd_mips_elf_lo16_reloc
917 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
918 extern bfd_reloc_status_type _bfd_mips_elf_gprel16_reloc
919 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
920 extern bfd_reloc_status_type _bfd_mips_elf_got16_reloc
921 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
922 extern bfd_reloc_status_type _bfd_mips_elf_gprel32_reloc
923 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
924 extern boolean _bfd_mips_elf_set_private_flags PARAMS ((bfd *, flagword));
925 extern boolean _bfd_mips_elf_copy_private_bfd_data PARAMS ((bfd *, bfd *));
926 extern boolean _bfd_mips_elf_merge_private_bfd_data PARAMS ((bfd *, bfd *));
927 extern boolean _bfd_mips_elf_find_nearest_line
928 PARAMS ((bfd *, asection *, asymbol **, bfd_vma, const char **,
929 const char **, unsigned int *));
930 extern boolean _bfd_mips_elf_set_section_contents
931 PARAMS ((bfd *, asection *, PTR, file_ptr, bfd_size_type));
933 #endif /* _LIBELF_H_ */