bfd/elf-bfd.h

   1 /* BFD back-end data structures for ELF files.
   2    Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
   3    2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
   4    Written by Cygnus Support.
   5
   6    This file is part of BFD, the Binary File Descriptor library.
   7
   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 3 of the License, or
  11    (at your option) any later version.
  12
  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.
  17
  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., 51 Franklin Street - Fifth Floor, Boston,
  21    MA 02110-1301, USA.  */
  22
  23 #ifndef _LIBELF_H_
  24 #define _LIBELF_H_ 1
  25
  26 #include "elf/common.h"
  27 #include "elf/external.h"
  28 #include "elf/internal.h"
  29 #include "bfdlink.h"
  30
  31 /* The number of entries in a section is its size divided by the size
  32    of a single entry.  This is normally only applicable to reloc and
  33    symbol table sections.  */
  34 #define NUM_SHDR_ENTRIES(shdr) ((shdr)->sh_size / (shdr)->sh_entsize)
  35
  36 /* If size isn't specified as 64 or 32, NAME macro should fail.  */
  37 #ifndef NAME
  38 #if ARCH_SIZE == 64
  39 #define NAME(x, y) x ## 64 ## _ ## y
  40 #endif
  41 #if ARCH_SIZE == 32
  42 #define NAME(x, y) x ## 32 ## _ ## y
  43 #endif
  44 #endif
  45
  46 #ifndef NAME
  47 #define NAME(x, y) x ## NOSIZE ## _ ## y
  48 #endif
  49
  50 #define ElfNAME(X)      NAME(Elf,X)
  51 #define elfNAME(X)      NAME(elf,X)
  52
  53 /* Information held for an ELF symbol.  The first field is the
  54    corresponding asymbol.  Every symbol is an ELF file is actually a
  55    pointer to this structure, although it is often handled as a
  56    pointer to an asymbol.  */
  57
  58 typedef struct
  59 {
  60   /* The BFD symbol.  */
  61   asymbol symbol;
  62   /* ELF symbol information.  */
  63   Elf_Internal_Sym internal_elf_sym;
  64   /* Backend specific information.  */
  65   union
  66     {
  67       unsigned int hppa_arg_reloc;
  68       void *mips_extr;
  69       void *any;
  70     }
  71   tc_data;
  72
  73   /* Version information.  This is from an Elf_Internal_Versym
  74      structure in a SHT_GNU_versym section.  It is zero if there is no
  75      version information.  */
  76   unsigned short version;
  77
  78 } elf_symbol_type;
  79 \f
  80 struct elf_strtab_hash;
  81 struct got_entry;
  82 struct plt_entry;
  83
  84 /* ELF linker hash table entries.  */
  85
  86 struct elf_link_hash_entry
  87 {
  88   struct bfd_link_hash_entry root;
  89
  90   /* Symbol index in output file.  This is initialized to -1.  It is
  91      set to -2 if the symbol is used by a reloc.  */
  92   long indx;
  93
  94   /* Symbol index as a dynamic symbol.  Initialized to -1, and remains
  95      -1 if this is not a dynamic symbol.  */
  96   /* ??? Note that this is consistently used as a synonym for tests
  97      against whether we can perform various simplifying transformations
  98      to the code.  (E.g. changing a pc-relative jump to a PLT entry
  99      into a pc-relative jump to the target function.)  That test, which
 100      is often relatively complex, and someplaces wrong or incomplete,
 101      should really be replaced by a predicate in elflink.c.
 102
 103      End result: this field -1 does not indicate that the symbol is
 104      not in the dynamic symbol table, but rather that the symbol is
 105      not visible outside this DSO.  */
 106   long dynindx;
 107
 108   /* If this symbol requires an entry in the global offset table, the
 109      processor specific backend uses this field to track usage and
 110      final offset.  Two schemes are supported:  The first assumes that
 111      a symbol may only have one GOT entry, and uses REFCOUNT until
 112      size_dynamic_sections, at which point the contents of the .got is
 113      fixed.  Afterward, if OFFSET is -1, then the symbol does not
 114      require a global offset table entry.  The second scheme allows
 115      multiple GOT entries per symbol, managed via a linked list
 116      pointed to by GLIST.  */
 117   union gotplt_union
 118     {
 119       bfd_signed_vma refcount;
 120       bfd_vma offset;
 121       struct got_entry *glist;
 122       struct plt_entry *plist;
 123     } got;
 124
 125   /* Same, but tracks a procedure linkage table entry.  */
 126   union gotplt_union plt;
 127
 128   /* Symbol size.  */
 129   bfd_size_type size;
 130
 131   /* Symbol type (STT_NOTYPE, STT_OBJECT, etc.).  */
 132   unsigned int type : 8;
 133
 134   /* Symbol st_other value, symbol visibility.  */
 135   unsigned int other : 8;
 136
 137   /* Symbol is referenced by a non-shared object.  */
 138   unsigned int ref_regular : 1;
 139   /* Symbol is defined by a non-shared object.  */
 140   unsigned int def_regular : 1;
 141   /* Symbol is referenced by a shared object.  */
 142   unsigned int ref_dynamic : 1;
 143   /* Symbol is defined by a shared object.  */
 144   unsigned int def_dynamic : 1;
 145   /* Symbol has a non-weak reference from a non-shared object.  */
 146   unsigned int ref_regular_nonweak : 1;
 147   /* Dynamic symbol has been adjustd.  */
 148   unsigned int dynamic_adjusted : 1;
 149   /* Symbol needs a copy reloc.  */
 150   unsigned int needs_copy : 1;
 151   /* Symbol needs a procedure linkage table entry.  */
 152   unsigned int needs_plt : 1;
 153   /* Symbol appears in a non-ELF input file.  */
 154   unsigned int non_elf : 1;
 155   /* Symbol should be marked as hidden in the version information.  */
 156   unsigned int hidden : 1;
 157   /* Symbol was forced to local scope due to a version script file.  */
 158   unsigned int forced_local : 1;
 159   /* Symbol was forced to be dynamic due to a version script file.  */
 160   unsigned int dynamic : 1;
 161   /* Symbol was marked during garbage collection.  */
 162   unsigned int mark : 1;
 163   /* Symbol is referenced by a non-GOT/non-PLT relocation.  This is
 164      not currently set by all the backends.  */
 165   unsigned int non_got_ref : 1;
 166   /* Symbol has a definition in a shared object.
 167      FIXME: There is no real need for this field if def_dynamic is never
 168      cleared and all places that test def_dynamic also test def_regular.  */
 169   unsigned int dynamic_def : 1;
 170   /* Symbol is weak in all shared objects.  */
 171   unsigned int dynamic_weak : 1;
 172   /* Symbol is referenced with a relocation where C/C++ pointer equality
 173      matters.  */
 174   unsigned int pointer_equality_needed : 1;
 175
 176   /* String table index in .dynstr if this is a dynamic symbol.  */
 177   unsigned long dynstr_index;
 178
 179   union
 180   {
 181     /* If this is a weak defined symbol from a dynamic object, this
 182        field points to a defined symbol with the same value, if there is
 183        one.  Otherwise it is NULL.  */
 184     struct elf_link_hash_entry *weakdef;
 185
 186     /* Hash value of the name computed using the ELF hash function.
 187        Used part way through size_dynamic_sections, after we've finished
 188        with weakdefs.  */
 189     unsigned long elf_hash_value;
 190   } u;
 191
 192   /* Version information.  */
 193   union
 194   {
 195     /* This field is used for a symbol which is not defined in a
 196        regular object.  It points to the version information read in
 197        from the dynamic object.  */
 198     Elf_Internal_Verdef *verdef;
 199     /* This field is used for a symbol which is defined in a regular
 200        object.  It is set up in size_dynamic_sections.  It points to
 201        the version information we should write out for this symbol.  */
 202     struct bfd_elf_version_tree *vertree;
 203   } verinfo;
 204
 205   struct
 206   {
 207     /* Virtual table entry use information.  This array is nominally of size
 208        size/sizeof(target_void_pointer), though we have to be able to assume
 209        and track a size while the symbol is still undefined.  It is indexed
 210        via offset/sizeof(target_void_pointer).  */
 211     size_t size;
 212     bfd_boolean *used;
 213
 214     /* Virtual table derivation info.  */
 215     struct elf_link_hash_entry *parent;
 216   } *vtable;
 217 };
 218
 219 /* Will references to this symbol always reference the symbol
 220    in this object?  STV_PROTECTED is excluded from the visibility test
 221    here so that function pointer comparisons work properly.  Since
 222    function symbols not defined in an app are set to their .plt entry,
 223    it's necessary for shared libs to also reference the .plt even
 224    though the symbol is really local to the shared lib.  */
 225 #define SYMBOL_REFERENCES_LOCAL(INFO, H) \
 226   _bfd_elf_symbol_refs_local_p (H, INFO, 0)
 227
 228 /* Will _calls_ to this symbol always call the version in this object?  */
 229 #define SYMBOL_CALLS_LOCAL(INFO, H) \
 230   _bfd_elf_symbol_refs_local_p (H, INFO, 1)
 231
 232 /* Common symbols that are turned into definitions don't have the
 233    DEF_REGULAR flag set, so they might appear to be undefined.  */
 234 #define ELF_COMMON_DEF_P(H) \
 235   (!(H)->def_regular                                                    \
 236    && !(H)->def_dynamic                                                 \
 237    && (H)->root.type == bfd_link_hash_defined)
 238
 239 /* Records local symbols to be emitted in the dynamic symbol table.  */
 240
 241 struct elf_link_local_dynamic_entry
 242 {
 243   struct elf_link_local_dynamic_entry *next;
 244
 245   /* The input bfd this symbol came from.  */
 246   bfd *input_bfd;
 247
 248   /* The index of the local symbol being copied.  */
 249   long input_indx;
 250
 251   /* The index in the outgoing dynamic symbol table.  */
 252   long dynindx;
 253
 254   /* A copy of the input symbol.  */
 255   Elf_Internal_Sym isym;
 256 };
 257
 258 struct elf_link_loaded_list
 259 {
 260   struct elf_link_loaded_list *next;
 261   bfd *abfd;
 262 };
 263
 264 /* Structures used by the eh_frame optimization code.  */
 265 struct eh_cie_fde
 266 {
 267   union {
 268     struct {
 269       /* If REMOVED == 1, this is the CIE that the FDE originally used.
 270          The CIE belongs to the same .eh_frame input section as the FDE.
 271
 272          If REMOVED == 0, this is the CIE that we have chosen to use for
 273          the output FDE.  The CIE's REMOVED field is also 0, but the CIE
 274          might belong to a different .eh_frame input section from the FDE.  */
 275       struct eh_cie_fde *cie_inf;
 276       struct eh_cie_fde *next_for_section;
 277     } fde;
 278     struct {
 279       /* CIEs have three states:
 280
 281          - REMOVED && !MERGED: Slated for removal because we haven't yet
 282            proven that an FDE needs it.  FULL_CIE, if nonnull, points to
 283            more detailed information about the CIE.
 284
 285          - REMOVED && MERGED: We have merged this CIE with MERGED_WITH,
 286            which may not belong to the same input section.
 287
 288          - !REMOVED: We have decided to keep this CIE.  SEC is the
 289            .eh_frame input section that contains the CIE.  */
 290       union {
 291         struct cie *full_cie;
 292         struct eh_cie_fde *merged_with;
 293         asection *sec;
 294       } u;
 295
 296       /* True if we have marked relocations associated with this CIE.  */
 297       unsigned int gc_mark : 1;
 298
 299       /* True if we have decided to turn an absolute LSDA encoding into
 300          a PC-relative one.  */
 301       unsigned int make_lsda_relative : 1;
 302
 303       /* True if the CIE contains personality data and if that data
 304          uses a PC-relative encoding.  */
 305       unsigned int per_encoding_relative : 1;
 306
 307       /* True if we need to add an 'R' (FDE encoding) entry to the
 308          CIE's augmentation data.  */
 309       unsigned int add_fde_encoding : 1;
 310
 311       /* True if we have merged this CIE with another.  */
 312       unsigned int merged : 1;
 313     } cie;
 314   } u;
 315   unsigned int reloc_index;
 316   unsigned int size;
 317   unsigned int offset;
 318   unsigned int new_offset;
 319   unsigned int fde_encoding : 8;
 320   unsigned int lsda_encoding : 8;
 321   unsigned int lsda_offset : 8;
 322
 323   /* True if this entry represents a CIE, false if it represents an FDE.  */
 324   unsigned int cie : 1;
 325
 326   /* True if this entry is currently marked for removal.  */
 327   unsigned int removed : 1;
 328
 329   /* True if we need to add a 'z' (augmentation size) entry to the CIE's
 330      augmentation data, and an associated byte to each of the CIE's FDEs.  */
 331   unsigned int add_augmentation_size : 1;
 332
 333   /* True if we have decided to convert absolute FDE relocations into
 334      relative ones.  This applies to the first relocation in the FDE,
 335      which is against the code that the FDE describes.  */
 336   unsigned int make_relative : 1;
 337
 338   /* Unused bits.  */
 339   unsigned int pad1 : 4;
 340
 341   unsigned int *set_loc;
 342 };
 343
 344 struct eh_frame_sec_info
 345 {
 346   unsigned int count;
 347   struct cie *cies;
 348   struct eh_cie_fde entry[1];
 349 };
 350
 351 struct eh_frame_array_ent
 352 {
 353   bfd_vma initial_loc;
 354   bfd_vma fde;
 355 };
 356
 357 struct htab;
 358
 359 struct eh_frame_hdr_info
 360 {
 361   struct htab *cies;
 362   asection *hdr_sec;
 363   unsigned int fde_count, array_count;
 364   struct eh_frame_array_ent *array;
 365   /* TRUE if we should try to merge CIEs between input sections.  */
 366   bfd_boolean merge_cies;
 367   /* TRUE if all .eh_frames have been parsd.  */
 368   bfd_boolean parsed_eh_frames;
 369   /* TRUE if .eh_frame_hdr should contain the sorted search table.
 370      We build it if we successfully read all .eh_frame input sections
 371      and recognize them.  */
 372   bfd_boolean table;
 373 };
 374
 375 /* ELF linker hash table.  */
 376
 377 struct elf_link_hash_table
 378 {
 379   struct bfd_link_hash_table root;
 380
 381   /* Whether we have created the special dynamic sections required
 382      when linking against or generating a shared object.  */
 383   bfd_boolean dynamic_sections_created;
 384
 385   /* True if this target has relocatable executables, so needs dynamic
 386      section symbols.  */
 387   bfd_boolean is_relocatable_executable;
 388
 389   /* The BFD used to hold special sections created by the linker.
 390      This will be the first BFD found which requires these sections to
 391      be created.  */
 392   bfd *dynobj;
 393
 394   /* The value to use when initialising got.refcount/offset and
 395      plt.refcount/offset in an elf_link_hash_entry.  Set to zero when
 396      the values are refcounts.  Set to init_got_offset/init_plt_offset
 397      in size_dynamic_sections when the values may be offsets.  */
 398   union gotplt_union init_got_refcount;
 399   union gotplt_union init_plt_refcount;
 400
 401   /* The value to use for got.refcount/offset and plt.refcount/offset
 402      when the values may be offsets.  Normally (bfd_vma) -1.  */
 403   union gotplt_union init_got_offset;
 404   union gotplt_union init_plt_offset;
 405
 406   /* The number of symbols found in the link which must be put into
 407      the .dynsym section.  */
 408   bfd_size_type dynsymcount;
 409
 410   /* The string table of dynamic symbols, which becomes the .dynstr
 411      section.  */
 412   struct elf_strtab_hash *dynstr;
 413
 414   /* The number of buckets in the hash table in the .hash section.
 415      This is based on the number of dynamic symbols.  */
 416   bfd_size_type bucketcount;
 417
 418   /* A linked list of DT_NEEDED names found in dynamic objects
 419      included in the link.  */
 420   struct bfd_link_needed_list *needed;
 421
 422   /* Sections in the output bfd that provides a section symbol
 423      to be used by relocations emitted against local symbols.
 424      Most targets will not use data_index_section.  */
 425   asection *text_index_section;
 426   asection *data_index_section;
 427
 428   /* The _GLOBAL_OFFSET_TABLE_ symbol.  */
 429   struct elf_link_hash_entry *hgot;
 430
 431   /* The _PROCEDURE_LINKAGE_TABLE_ symbol.  */
 432   struct elf_link_hash_entry *hplt;
 433
 434   /* A pointer to information used to merge SEC_MERGE sections.  */
 435   void *merge_info;
 436
 437   /* Used to link stabs in sections.  */
 438   struct stab_info stab_info;
 439
 440   /* Used by eh_frame code when editing .eh_frame.  */
 441   struct eh_frame_hdr_info eh_info;
 442
 443   /* A linked list of local symbols to be added to .dynsym.  */
 444   struct elf_link_local_dynamic_entry *dynlocal;
 445
 446   /* A linked list of DT_RPATH/DT_RUNPATH names found in dynamic
 447      objects included in the link.  */
 448   struct bfd_link_needed_list *runpath;
 449
 450   /* Cached first output tls section and size of PT_TLS segment.  */
 451   asection *tls_sec;
 452   bfd_size_type tls_size;
 453
 454   /* A linked list of BFD's loaded in the link.  */
 455   struct elf_link_loaded_list *loaded;
 456 };
 457
 458 /* Look up an entry in an ELF linker hash table.  */
 459
 460 #define elf_link_hash_lookup(table, string, create, copy, follow)       \
 461   ((struct elf_link_hash_entry *)                                       \
 462    bfd_link_hash_lookup (&(table)->root, (string), (create),            \
 463                          (copy), (follow)))
 464
 465 /* Traverse an ELF linker hash table.  */
 466
 467 #define elf_link_hash_traverse(table, func, info)                       \
 468   (bfd_link_hash_traverse                                               \
 469    (&(table)->root,                                                     \
 470     (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func),    \
 471     (info)))
 472
 473 /* Get the ELF linker hash table from a link_info structure.  */
 474
 475 #define elf_hash_table(p) ((struct elf_link_hash_table *) ((p)->hash))
 476
 477 /* Returns TRUE if the hash table is a struct elf_link_hash_table.  */
 478 #define is_elf_hash_table(htab)                                         \
 479   (((struct bfd_link_hash_table *) (htab))->type == bfd_link_elf_hash_table)
 480
 481 /* Used by bfd_section_from_r_symndx to cache a small number of local
 482    symbol to section mappings.  */
 483 #define LOCAL_SYM_CACHE_SIZE 32
 484 struct sym_sec_cache
 485 {
 486   bfd *abfd;
 487   unsigned long indx[LOCAL_SYM_CACHE_SIZE];
 488   unsigned int shndx[LOCAL_SYM_CACHE_SIZE];
 489 };
 490 \f
 491 /* Constant information held for an ELF backend.  */
 492
 493 struct elf_size_info {
 494   unsigned char sizeof_ehdr, sizeof_phdr, sizeof_shdr;
 495   unsigned char sizeof_rel, sizeof_rela, sizeof_sym, sizeof_dyn, sizeof_note;
 496
 497   /* The size of entries in the .hash section.  */
 498   unsigned char sizeof_hash_entry;
 499
 500   /* The number of internal relocations to allocate per external
 501      relocation entry.  */
 502   unsigned char int_rels_per_ext_rel;
 503   /* We use some fixed size arrays.  This should be large enough to
 504      handle all back-ends.  */
 505 #define MAX_INT_RELS_PER_EXT_REL 3
 506
 507   unsigned char arch_size, log_file_align;
 508   unsigned char elfclass, ev_current;
 509   int (*write_out_phdrs)
 510     (bfd *, const Elf_Internal_Phdr *, unsigned int);
 511   bfd_boolean
 512     (*write_shdrs_and_ehdr) (bfd *);
 513   bfd_boolean (*checksum_contents)
 514     (bfd * , void (*) (const void *, size_t, void *), void *);
 515   void (*write_relocs)
 516     (bfd *, asection *, void *);
 517   bfd_boolean (*swap_symbol_in)
 518     (bfd *, const void *, const void *, Elf_Internal_Sym *);
 519   void (*swap_symbol_out)
 520     (bfd *, const Elf_Internal_Sym *, void *, void *);
 521   bfd_boolean (*slurp_reloc_table)
 522     (bfd *, asection *, asymbol **, bfd_boolean);
 523   long (*slurp_symbol_table)
 524     (bfd *, asymbol **, bfd_boolean);
 525   void (*swap_dyn_in)
 526     (bfd *, const void *, Elf_Internal_Dyn *);
 527   void (*swap_dyn_out)
 528     (bfd *, const Elf_Internal_Dyn *, void *);
 529
 530   /* This function is called to swap in a REL relocation.  If an
 531      external relocation corresponds to more than one internal
 532      relocation, then all relocations are swapped in at once.  */
 533   void (*swap_reloc_in)
 534     (bfd *, const bfd_byte *, Elf_Internal_Rela *);
 535
 536   /* This function is called to swap out a REL relocation.  */
 537   void (*swap_reloc_out)
 538     (bfd *, const Elf_Internal_Rela *, bfd_byte *);
 539
 540   /* This function is called to swap in a RELA relocation.  If an
 541      external relocation corresponds to more than one internal
 542      relocation, then all relocations are swapped in at once.  */
 543   void (*swap_reloca_in)
 544     (bfd *, const bfd_byte *, Elf_Internal_Rela *);
 545
 546   /* This function is called to swap out a RELA relocation.  */
 547   void (*swap_reloca_out)
 548     (bfd *, const Elf_Internal_Rela *, bfd_byte *);
 549 };
 550
 551 #define elf_symbol_from(ABFD,S) \
 552         (((S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \
 553           && (S)->the_bfd->tdata.elf_obj_data != 0) \
 554          ? (elf_symbol_type *) (S) \
 555          : 0)
 556
 557 enum elf_reloc_type_class {
 558   reloc_class_normal,
 559   reloc_class_relative,
 560   reloc_class_plt,
 561   reloc_class_copy
 562 };
 563
 564 struct elf_reloc_cookie
 565 {
 566   Elf_Internal_Rela *rels, *rel, *relend;
 567   Elf_Internal_Sym *locsyms;
 568   bfd *abfd;
 569   size_t locsymcount;
 570   size_t extsymoff;
 571   struct elf_link_hash_entry **sym_hashes;
 572   int r_sym_shift;
 573   bfd_boolean bad_symtab;
 574 };
 575
 576 /* The level of IRIX compatibility we're striving for.  */
 577
 578 typedef enum {
 579   ict_none,
 580   ict_irix5,
 581   ict_irix6
 582 } irix_compat_t;
 583
 584 /* Mapping of ELF section names and types.  */
 585 struct bfd_elf_special_section
 586 {
 587   const char *prefix;
 588   int prefix_length;
 589   /* 0 means name must match PREFIX exactly.
 590      -1 means name must start with PREFIX followed by an arbitrary string.
 591      -2 means name must match PREFIX exactly or consist of PREFIX followed
 592      by a dot then anything.
 593      > 0 means name must start with the first PREFIX_LENGTH chars of
 594      PREFIX and finish with the last SUFFIX_LENGTH chars of PREFIX.  */
 595   int suffix_length;
 596   int type;
 597   int attr;
 598 };
 599
 600 enum action_discarded
 601   {
 602     COMPLAIN = 1,
 603     PRETEND = 2
 604   };
 605
 606 typedef asection * (*elf_gc_mark_hook_fn)
 607   (asection *, struct bfd_link_info *, Elf_Internal_Rela *,
 608    struct elf_link_hash_entry *, Elf_Internal_Sym *);
 609
 610 struct elf_backend_data
 611 {
 612   /* The architecture for this backend.  */
 613   enum bfd_architecture arch;
 614
 615   /* The ELF machine code (EM_xxxx) for this backend.  */
 616   int elf_machine_code;
 617
 618   /* EI_OSABI. */
 619   int elf_osabi;
 620
 621   /* The maximum page size for this backend.  */
 622   bfd_vma maxpagesize;
 623
 624   /* The minimum page size for this backend.  An input object will not be
 625      considered page aligned unless its sections are correctly aligned for
 626      pages at least this large.  May be smaller than maxpagesize.  */
 627   bfd_vma minpagesize;
 628
 629   /* The common page size for this backend.  */
 630   bfd_vma commonpagesize;
 631
 632   /* The BFD flags applied to sections created for dynamic linking.  */
 633   flagword dynamic_sec_flags;
 634
 635   /* A function to translate an ELF RELA relocation to a BFD arelent
 636      structure.  */
 637   void (*elf_info_to_howto)
 638     (bfd *, arelent *, Elf_Internal_Rela *);
 639
 640   /* A function to translate an ELF REL relocation to a BFD arelent
 641      structure.  */
 642   void (*elf_info_to_howto_rel)
 643     (bfd *, arelent *, Elf_Internal_Rela *);
 644
 645   /* A function to determine whether a symbol is global when
 646      partitioning the symbol table into local and global symbols.
 647      This should be NULL for most targets, in which case the correct
 648      thing will be done.  MIPS ELF, at least on the Irix 5, has
 649      special requirements.  */
 650   bfd_boolean (*elf_backend_sym_is_global)
 651     (bfd *, asymbol *);
 652
 653   /* The remaining functions are hooks which are called only if they
 654      are not NULL.  */
 655
 656   /* A function to permit a backend specific check on whether a
 657      particular BFD format is relevant for an object file, and to
 658      permit the backend to set any global information it wishes.  When
 659      this is called elf_elfheader is set, but anything else should be
 660      used with caution.  If this returns FALSE, the check_format
 661      routine will return a bfd_error_wrong_format error.  */
 662   bfd_boolean (*elf_backend_object_p)
 663     (bfd *);
 664
 665   /* A function to do additional symbol processing when reading the
 666      ELF symbol table.  This is where any processor-specific special
 667      section indices are handled.  */
 668   void (*elf_backend_symbol_processing)
 669     (bfd *, asymbol *);
 670
 671   /* A function to do additional symbol processing after reading the
 672      entire ELF symbol table.  */
 673   bfd_boolean (*elf_backend_symbol_table_processing)
 674     (bfd *, elf_symbol_type *, unsigned int);
 675
 676   /* A function to set the type of the info field.  Processor-specific
 677      types should be handled here.  */
 678   int (*elf_backend_get_symbol_type)
 679     (Elf_Internal_Sym *, int);
 680
 681   /* A function to return the linker hash table entry of a symbol that
 682      might be satisfied by an archive symbol.  */
 683   struct elf_link_hash_entry * (*elf_backend_archive_symbol_lookup)
 684     (bfd *, struct bfd_link_info *, const char *);
 685
 686   /* Return true if local section symbols should have a non-null st_name.
 687      NULL implies false.  */
 688   bfd_boolean (*elf_backend_name_local_section_symbols)
 689     (bfd *);
 690
 691   /* A function to do additional processing on the ELF section header
 692      just before writing it out.  This is used to set the flags and
 693      type fields for some sections, or to actually write out data for
 694      unusual sections.  */
 695   bfd_boolean (*elf_backend_section_processing)
 696     (bfd *, Elf_Internal_Shdr *);
 697
 698   /* A function to handle unusual section types when creating BFD
 699      sections from ELF sections.  */
 700   bfd_boolean (*elf_backend_section_from_shdr)
 701     (bfd *, Elf_Internal_Shdr *, const char *, int);
 702
 703   /* A function to convert machine dependent ELF section header flags to
 704      BFD internal section header flags.  */
 705   bfd_boolean (*elf_backend_section_flags)
 706     (flagword *, const Elf_Internal_Shdr *);
 707
 708   /* A function that returns a struct containing ELF section flags and
 709      type for the given BFD section.   */
 710   const struct bfd_elf_special_section * (*get_sec_type_attr)
 711     (bfd *, asection *);
 712
 713   /* A function to handle unusual program segment types when creating BFD
 714      sections from ELF program segments.  */
 715   bfd_boolean (*elf_backend_section_from_phdr)
 716     (bfd *, Elf_Internal_Phdr *, int, const char *);
 717
 718   /* A function to set up the ELF section header for a BFD section in
 719      preparation for writing it out.  This is where the flags and type
 720      fields are set for unusual sections.  */
 721   bfd_boolean (*elf_backend_fake_sections)
 722     (bfd *, Elf_Internal_Shdr *, asection *);
 723
 724   /* A function to get the ELF section index for a BFD section.  If
 725      this returns TRUE, the section was found.  If it is a normal ELF
 726      section, *RETVAL should be left unchanged.  If it is not a normal
 727      ELF section *RETVAL should be set to the SHN_xxxx index.  */
 728   bfd_boolean (*elf_backend_section_from_bfd_section)
 729     (bfd *, asection *, int *retval);
 730
 731   /* If this field is not NULL, it is called by the add_symbols phase
 732      of a link just before adding a symbol to the global linker hash
 733      table.  It may modify any of the fields as it wishes.  If *NAME
 734      is set to NULL, the symbol will be skipped rather than being
 735      added to the hash table.  This function is responsible for
 736      handling all processor dependent symbol bindings and section
 737      indices, and must set at least *FLAGS and *SEC for each processor
 738      dependent case; failure to do so will cause a link error.  */
 739   bfd_boolean (*elf_add_symbol_hook)
 740     (bfd *abfd, struct bfd_link_info *info, Elf_Internal_Sym *,
 741      const char **name, flagword *flags, asection **sec, bfd_vma *value);
 742
 743   /* If this field is not NULL, it is called by the elf_link_output_sym
 744      phase of a link for each symbol which will appear in the object file.  */
 745   bfd_boolean (*elf_backend_link_output_symbol_hook)
 746     (struct bfd_link_info *info, const char *, Elf_Internal_Sym *,
 747      asection *, struct elf_link_hash_entry *);
 748
 749   /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend
 750      linker the first time it encounters a dynamic object in the link.
 751      This function must create any sections required for dynamic
 752      linking.  The ABFD argument is a dynamic object.  The .interp,
 753      .dynamic, .dynsym, .dynstr, and .hash functions have already been
 754      created, and this function may modify the section flags if
 755      desired.  This function will normally create the .got and .plt
 756      sections, but different backends have different requirements.  */
 757   bfd_boolean (*elf_backend_create_dynamic_sections)
 758     (bfd *abfd, struct bfd_link_info *info);
 759
 760   /* When creating a shared library, determine whether to omit the
 761      dynamic symbol for the section.  */
 762   bfd_boolean (*elf_backend_omit_section_dynsym)
 763     (bfd *output_bfd, struct bfd_link_info *info, asection *osec);
 764
 765   /* Return TRUE if relocations of targets are compatible to the extent
 766      that CHECK_RELOCS will properly process them.  PR 4424.  */
 767   bfd_boolean (*relocs_compatible) (const bfd_target *, const bfd_target *);
 768
 769   /* The CHECK_RELOCS function is called by the add_symbols phase of
 770      the ELF backend linker.  It is called once for each section with
 771      relocs of an object file, just after the symbols for the object
 772      file have been added to the global linker hash table.  The
 773      function must look through the relocs and do any special handling
 774      required.  This generally means allocating space in the global
 775      offset table, and perhaps allocating space for a reloc.  The
 776      relocs are always passed as Rela structures; if the section
 777      actually uses Rel structures, the r_addend field will always be
 778      zero.  */
 779   bfd_boolean (*check_relocs)
 780     (bfd *abfd, struct bfd_link_info *info, asection *o,
 781      const Elf_Internal_Rela *relocs);
 782
 783   /* The CHECK_DIRECTIVES function is called once per input file by
 784      the add_symbols phase of the ELF backend linker.  The function
 785      must inspect the bfd and create any additional symbols according
 786      to any custom directives in the bfd.  */
 787   bfd_boolean (*check_directives)
 788     (bfd *abfd, struct bfd_link_info *info);
 789
 790   /* The AS_NEEDED_CLEANUP function is called once per --as-needed
 791      input file that was not needed by the add_symbols phase of the
 792      ELF backend linker.  The function must undo any target specific
 793      changes in the symbol hash table.  */
 794   bfd_boolean (*as_needed_cleanup)
 795     (bfd *abfd, struct bfd_link_info *info);
 796
 797   /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
 798      linker for every symbol which is defined by a dynamic object and
 799      referenced by a regular object.  This is called after all the
 800      input files have been seen, but before the SIZE_DYNAMIC_SECTIONS
 801      function has been called.  The hash table entry should be
 802      bfd_link_hash_defined ore bfd_link_hash_defweak, and it should be
 803      defined in a section from a dynamic object.  Dynamic object
 804      sections are not included in the final link, and this function is
 805      responsible for changing the value to something which the rest of
 806      the link can deal with.  This will normally involve adding an
 807      entry to the .plt or .got or some such section, and setting the
 808      symbol to point to that.  */
 809   bfd_boolean (*elf_backend_adjust_dynamic_symbol)
 810     (struct bfd_link_info *info, struct elf_link_hash_entry *h);
 811
 812   /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker
 813      after all the linker input files have been seen but before the
 814      section sizes have been set.  This is called after
 815      ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS.  */
 816   bfd_boolean (*elf_backend_always_size_sections)
 817     (bfd *output_bfd, struct bfd_link_info *info);
 818
 819   /* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend
 820      linker after all the linker input files have been seen but before
 821      the sections sizes have been set.  This is called after
 822      ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols.
 823      It is only called when linking against a dynamic object.  It must
 824      set the sizes of the dynamic sections, and may fill in their
 825      contents as well.  The generic ELF linker can handle the .dynsym,
 826      .dynstr and .hash sections.  This function must handle the
 827      .interp section and any sections created by the
 828      CREATE_DYNAMIC_SECTIONS entry point.  */
 829   bfd_boolean (*elf_backend_size_dynamic_sections)
 830     (bfd *output_bfd, struct bfd_link_info *info);
 831
 832   /* Set TEXT_INDEX_SECTION and DATA_INDEX_SECTION, the output sections
 833      we keep to use as a base for relocs and symbols.  */
 834   void (*elf_backend_init_index_section)
 835     (bfd *output_bfd, struct bfd_link_info *info);
 836
 837   /* The RELOCATE_SECTION function is called by the ELF backend linker
 838      to handle the relocations for a section.
 839
 840      The relocs are always passed as Rela structures; if the section
 841      actually uses Rel structures, the r_addend field will always be
 842      zero.
 843
 844      This function is responsible for adjust the section contents as
 845      necessary, and (if using Rela relocs and generating a
 846      relocatable output file) adjusting the reloc addend as
 847      necessary.
 848
 849      This function does not have to worry about setting the reloc
 850      address or the reloc symbol index.
 851
 852      LOCAL_SYMS is a pointer to the swapped in local symbols.
 853
 854      LOCAL_SECTIONS is an array giving the section in the input file
 855      corresponding to the st_shndx field of each local symbol.
 856
 857      The global hash table entry for the global symbols can be found
 858      via elf_sym_hashes (input_bfd).
 859
 860      When generating relocatable output, this function must handle
 861      STB_LOCAL/STT_SECTION symbols specially.  The output symbol is
 862      going to be the section symbol corresponding to the output
 863      section, which means that the addend must be adjusted
 864      accordingly.
 865
 866      Returns FALSE on error, TRUE on success, 2 if successful and
 867      relocations should be written for this section.  */
 868   int (*elf_backend_relocate_section)
 869     (bfd *output_bfd, struct bfd_link_info *info, bfd *input_bfd,
 870      asection *input_section, bfd_byte *contents, Elf_Internal_Rela *relocs,
 871      Elf_Internal_Sym *local_syms, asection **local_sections);
 872
 873   /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend
 874      linker just before it writes a symbol out to the .dynsym section.
 875      The processor backend may make any required adjustment to the
 876      symbol.  It may also take the opportunity to set contents of the
 877      dynamic sections.  Note that FINISH_DYNAMIC_SYMBOL is called on
 878      all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called
 879      on those symbols which are defined by a dynamic object.  */
 880   bfd_boolean (*elf_backend_finish_dynamic_symbol)
 881     (bfd *output_bfd, struct bfd_link_info *info,
 882      struct elf_link_hash_entry *h, Elf_Internal_Sym *sym);
 883
 884   /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend
 885      linker just before it writes all the dynamic sections out to the
 886      output file.  The FINISH_DYNAMIC_SYMBOL will have been called on
 887      all dynamic symbols.  */
 888   bfd_boolean (*elf_backend_finish_dynamic_sections)
 889     (bfd *output_bfd, struct bfd_link_info *info);
 890
 891   /* A function to do any beginning processing needed for the ELF file
 892      before building the ELF headers and computing file positions.  */
 893   void (*elf_backend_begin_write_processing)
 894     (bfd *, struct bfd_link_info *);
 895
 896   /* A function to do any final processing needed for the ELF file
 897      before writing it out.  The LINKER argument is TRUE if this BFD
 898      was created by the ELF backend linker.  */
 899   void (*elf_backend_final_write_processing)
 900     (bfd *, bfd_boolean linker);
 901
 902   /* This function is called by get_program_header_size.  It should
 903      return the number of additional program segments which this BFD
 904      will need.  It should return -1 on error.  */
 905   int (*elf_backend_additional_program_headers)
 906     (bfd *, struct bfd_link_info *);
 907
 908   /* This function is called to modify an existing segment map in a
 909      backend specific fashion.  */
 910   bfd_boolean (*elf_backend_modify_segment_map)
 911     (bfd *, struct bfd_link_info *);
 912
 913   /* This function is called to modify program headers just before
 914      they are written.  */
 915   bfd_boolean (*elf_backend_modify_program_headers)
 916     (bfd *, struct bfd_link_info *);
 917
 918   /* This function is called before section garbage collection to
 919      mark entry symbol sections.  */
 920   void (*gc_keep)
 921     (struct bfd_link_info *);
 922
 923   /* This function is called during section garbage collection to
 924      mark sections that define global symbols.  */
 925   bfd_boolean (*gc_mark_dynamic_ref)
 926     (struct elf_link_hash_entry *, void *);
 927
 928   /* This function is called during section gc to discover the section a
 929      particular relocation refers to.  */
 930   elf_gc_mark_hook_fn gc_mark_hook;
 931
 932   /* This function, if defined, is called after the first gc marking pass
 933      to allow the backend to mark additional sections.  */
 934   bfd_boolean (*gc_mark_extra_sections)
 935     (struct bfd_link_info *, elf_gc_mark_hook_fn);
 936
 937   /* This function, if defined, is called during the sweep phase of gc
 938      in order that a backend might update any data structures it might
 939      be maintaining.  */
 940   bfd_boolean (*gc_sweep_hook)
 941     (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *);
 942
 943   /* This function, if defined, is called after the ELF headers have
 944      been created.  This allows for things like the OS and ABI versions
 945      to be changed.  */
 946   void (*elf_backend_post_process_headers)
 947     (bfd *, struct bfd_link_info *);
 948
 949   /* This function, if defined, prints a symbol to file and returns the
 950      name of the symbol to be printed.  It should return NULL to fall
 951      back to default symbol printing.  */
 952   const char *(*elf_backend_print_symbol_all)
 953     (bfd *, void *, asymbol *);
 954
 955   /* This function, if defined, is called after all local symbols and
 956      global symbols converted to locals are emitted into the symtab
 957      section.  It allows the backend to emit special local symbols
 958      not handled in the hash table.  */
 959   bfd_boolean (*elf_backend_output_arch_local_syms)
 960     (bfd *, struct bfd_link_info *, void *,
 961      bfd_boolean (*) (void *, const char *, Elf_Internal_Sym *, asection *,
 962                       struct elf_link_hash_entry *));
 963
 964   /* This function, if defined, is called after all symbols are emitted
 965      into the symtab section.  It allows the backend to emit special
 966      global symbols not handled in the hash table.  */
 967   bfd_boolean (*elf_backend_output_arch_syms)
 968     (bfd *, struct bfd_link_info *, void *,
 969      bfd_boolean (*) (void *, const char *, Elf_Internal_Sym *, asection *,
 970                       struct elf_link_hash_entry *));
 971
 972   /* Copy any information related to dynamic linking from a pre-existing
 973      symbol to a newly created symbol.  Also called to copy flags and
 974      other back-end info to a weakdef, in which case the symbol is not
 975      newly created and plt/got refcounts and dynamic indices should not
 976      be copied.  */
 977   void (*elf_backend_copy_indirect_symbol)
 978     (struct bfd_link_info *, struct elf_link_hash_entry *,
 979      struct elf_link_hash_entry *);
 980
 981   /* Modify any information related to dynamic linking such that the
 982      symbol is not exported.  */
 983   void (*elf_backend_hide_symbol)
 984     (struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean);
 985
 986   /* A function to do additional symbol fixup, called by
 987      _bfd_elf_fix_symbol_flags.  */
 988   bfd_boolean (*elf_backend_fixup_symbol)
 989     (struct bfd_link_info *, struct elf_link_hash_entry *);
 990
 991   /* Merge the backend specific symbol attribute.  */
 992   void (*elf_backend_merge_symbol_attribute)
 993     (struct elf_link_hash_entry *, const Elf_Internal_Sym *, bfd_boolean,
 994      bfd_boolean);
 995
 996   /* This function, if defined, will return a string containing the
 997      name of a target-specific dynamic tag.  */
 998   char *(*elf_backend_get_target_dtag)
 999     (bfd_vma);
1000
1001   /* Decide whether an undefined symbol is special and can be ignored.
1002      This is the case for OPTIONAL symbols on IRIX.  */
1003   bfd_boolean (*elf_backend_ignore_undef_symbol)
1004     (struct elf_link_hash_entry *);
1005
1006   /* Emit relocations.  Overrides default routine for emitting relocs,
1007      except during a relocatable link, or if all relocs are being emitted.  */
1008   bfd_boolean (*elf_backend_emit_relocs)
1009     (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *,
1010      struct elf_link_hash_entry **);
1011
1012   /* Count relocations.  Not called for relocatable links
1013      or if all relocs are being preserved in the output.  */
1014   unsigned int (*elf_backend_count_relocs)
1015     (struct bfd_link_info *, asection *);
1016
1017   /* This function, if defined, is called when an NT_PRSTATUS note is found
1018      in a core file.  */
1019   bfd_boolean (*elf_backend_grok_prstatus)
1020     (bfd *, Elf_Internal_Note *);
1021
1022   /* This function, if defined, is called when an NT_PSINFO or NT_PRPSINFO
1023      note is found in a core file.  */
1024   bfd_boolean (*elf_backend_grok_psinfo)
1025     (bfd *, Elf_Internal_Note *);
1026
1027   /* This function, if defined, is called to write a note to a corefile.  */
1028   char *(*elf_backend_write_core_note)
1029     (bfd *abfd, char *buf, int *bufsiz, int note_type, ...);
1030
1031   /* This function returns class of a reloc type.  */
1032   enum elf_reloc_type_class (*elf_backend_reloc_type_class)
1033     (const Elf_Internal_Rela *);
1034
1035   /* This function, if defined, removes information about discarded functions
1036      from other sections which mention them.  */
1037   bfd_boolean (*elf_backend_discard_info)
1038     (bfd *, struct elf_reloc_cookie *, struct bfd_link_info *);
1039
1040   /* This function, if defined, signals that the function above has removed
1041      the discarded relocations for this section.  */
1042   bfd_boolean (*elf_backend_ignore_discarded_relocs)
1043     (asection *);
1044
1045   /* What to do when ld finds relocations against symbols defined in
1046      discarded sections.  */
1047   unsigned int (*action_discarded)
1048     (asection *);
1049
1050   /* This function returns the width of FDE pointers in bytes, or 0 if
1051      that can't be determined for some reason.  The default definition
1052      goes by the bfd's EI_CLASS.  */
1053   unsigned int (*elf_backend_eh_frame_address_size)
1054     (bfd *, asection *);
1055
1056   /* These functions tell elf-eh-frame whether to attempt to turn
1057      absolute or lsda encodings into pc-relative ones.  The default
1058      definition enables these transformations.  */
1059   bfd_boolean (*elf_backend_can_make_relative_eh_frame)
1060      (bfd *, struct bfd_link_info *, asection *);
1061   bfd_boolean (*elf_backend_can_make_lsda_relative_eh_frame)
1062      (bfd *, struct bfd_link_info *, asection *);
1063
1064   /* This function returns an encoding after computing the encoded
1065      value (and storing it in ENCODED) for the given OFFSET into OSEC,
1066      to be stored in at LOC_OFFSET into the LOC_SEC input section.
1067      The default definition chooses a 32-bit PC-relative encoding.  */
1068   bfd_byte (*elf_backend_encode_eh_address)
1069      (bfd *abfd, struct bfd_link_info *info,
1070       asection *osec, bfd_vma offset,
1071       asection *loc_sec, bfd_vma loc_offset,
1072       bfd_vma *encoded);
1073
1074   /* This function, if defined, may write out the given section.
1075      Returns TRUE if it did so and FALSE if the caller should.  */
1076   bfd_boolean (*elf_backend_write_section)
1077     (bfd *, struct bfd_link_info *, asection *, bfd_byte *);
1078
1079   /* The level of IRIX compatibility we're striving for.
1080      MIPS ELF specific function.  */
1081   irix_compat_t (*elf_backend_mips_irix_compat)
1082     (bfd *);
1083
1084   reloc_howto_type *(*elf_backend_mips_rtype_to_howto)
1085     (unsigned int, bfd_boolean);
1086
1087   /* The swapping table to use when dealing with ECOFF information.
1088      Used for the MIPS ELF .mdebug section.  */
1089   const struct ecoff_debug_swap *elf_backend_ecoff_debug_swap;
1090
1091   /* This function implements `bfd_elf_bfd_from_remote_memory';
1092      see elf.c, elfcode.h.  */
1093   bfd *(*elf_backend_bfd_from_remote_memory)
1094      (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep,
1095       int (*target_read_memory) (bfd_vma vma, bfd_byte *myaddr, int len));
1096
1097   /* This function is used by `_bfd_elf_get_synthetic_symtab';
1098      see elf.c.  */
1099   bfd_vma (*plt_sym_val) (bfd_vma, const asection *, const arelent *);
1100
1101   /* Is symbol defined in common section?  */
1102   bfd_boolean (*common_definition) (Elf_Internal_Sym *);
1103
1104   /* Return a common section index for section.  */
1105   unsigned int (*common_section_index) (asection *);
1106
1107   /* Return a common section for section.  */
1108   asection *(*common_section) (asection *);
1109
1110   /* Return TRUE if we can merge 2 definitions.  */
1111   bfd_boolean (*merge_symbol) (struct bfd_link_info *,
1112                                struct elf_link_hash_entry **,
1113                                struct elf_link_hash_entry *,
1114                                Elf_Internal_Sym *, asection **,
1115                                bfd_vma *, unsigned int *,
1116                                bfd_boolean *, bfd_boolean *,
1117                                bfd_boolean *, bfd_boolean *,
1118                                bfd_boolean *, bfd_boolean *,
1119                                bfd_boolean *, bfd_boolean *,
1120                                bfd *, asection **,
1121                                bfd_boolean *, bfd_boolean *,
1122                                bfd_boolean *, bfd_boolean *,
1123                                bfd *, asection **);
1124
1125   /* Return TRUE if symbol should be hashed in the `.gnu.hash' section.  */
1126   bfd_boolean (*elf_hash_symbol) (struct elf_link_hash_entry *);
1127
1128   /* Return TRUE if type is a function symbol type.  */
1129   bfd_boolean (*is_function_type) (unsigned int type);
1130
1131   /* Used to handle bad SHF_LINK_ORDER input.  */
1132   bfd_error_handler_type link_order_error_handler;
1133
1134   /* Name of the PLT relocation section.  */
1135   const char *relplt_name;
1136
1137   /* Alternate EM_xxxx machine codes for this backend.  */
1138   int elf_machine_alt1;
1139   int elf_machine_alt2;
1140
1141   const struct elf_size_info *s;
1142
1143   /* An array of target specific special sections.  */
1144   const struct bfd_elf_special_section *special_sections;
1145
1146   /* The size in bytes of the header for the GOT.  This includes the
1147      so-called reserved entries on some systems.  */
1148   bfd_vma got_header_size;
1149
1150   /* The size of the GOT entry for the symbol pointed to by H if non-NULL,
1151      otherwise by the local symbol with index SYMNDX in IBFD.  */
1152   bfd_vma (*got_elt_size) (bfd *, struct bfd_link_info *,
1153                            struct elf_link_hash_entry *h,
1154                            bfd *ibfd, unsigned long symndx);
1155
1156   /* The vendor name to use for a processor-standard attributes section.  */
1157   const char *obj_attrs_vendor;
1158
1159   /* The section name to use for a processor-standard attributes section.  */
1160   const char *obj_attrs_section;
1161
1162   /* Return 1, 2 or 3 to indicate what type of arguments a
1163      processor-specific tag takes.  */
1164   int (*obj_attrs_arg_type) (int);
1165
1166   /* The section type to use for an attributes section.  */
1167   unsigned int obj_attrs_section_type;
1168
1169   /* This is TRUE if the linker should act like collect and gather
1170      global constructors and destructors by name.  This is TRUE for
1171      MIPS ELF because the Irix 5 tools can not handle the .init
1172      section.  */
1173   unsigned collect : 1;
1174
1175   /* This is TRUE if the linker should ignore changes to the type of a
1176      symbol.  This is TRUE for MIPS ELF because some Irix 5 objects
1177      record undefined functions as STT_OBJECT although the definitions
1178      are STT_FUNC.  */
1179   unsigned type_change_ok : 1;
1180
1181   /* Whether the backend may use REL relocations.  (Some backends use
1182      both REL and RELA relocations, and this flag is set for those
1183      backends.)  */
1184   unsigned may_use_rel_p : 1;
1185
1186   /* Whether the backend may use RELA relocations.  (Some backends use
1187      both REL and RELA relocations, and this flag is set for those
1188      backends.)  */
1189   unsigned may_use_rela_p : 1;
1190
1191   /* Whether the default relocation type is RELA.  If a backend with
1192      this flag set wants REL relocations for a particular section,
1193      it must note that explicitly.  Similarly, if this flag is clear,
1194      and the backend wants RELA relocations for a particular
1195      section.  */
1196   unsigned default_use_rela_p : 1;
1197
1198   /* True if PLT and copy relocations should be RELA by default.  */
1199   unsigned rela_plts_and_copies_p : 1;
1200
1201   /* Set if RELA relocations for a relocatable link can be handled by
1202      generic code.  Backends that set this flag need do nothing in the
1203      backend relocate_section routine for relocatable linking.  */
1204   unsigned rela_normal : 1;
1205
1206   /* TRUE if addresses "naturally" sign extend.  This is used when
1207      swapping in from Elf32 when BFD64.  */
1208   unsigned sign_extend_vma : 1;
1209
1210   unsigned want_got_plt : 1;
1211   unsigned plt_readonly : 1;
1212   unsigned want_plt_sym : 1;
1213   unsigned plt_not_loaded : 1;
1214   unsigned plt_alignment : 4;
1215   unsigned can_gc_sections : 1;
1216   unsigned can_refcount : 1;
1217   unsigned want_got_sym : 1;
1218   unsigned want_dynbss : 1;
1219
1220   /* Targets which do not support physical addressing often require
1221      that the p_paddr field in the section header to be set to zero.
1222      This field indicates whether this behavior is required.  */
1223   unsigned want_p_paddr_set_to_zero : 1;
1224
1225   /* True if an object file lacking a .note.GNU-stack section
1226      should be assumed to be requesting exec stack.  At least one
1227      other file in the link needs to have a .note.GNU-stack section
1228      for a PT_GNU_STACK segment to be created.  */
1229   unsigned default_execstack : 1;
1230 };
1231
1232 /* Information stored for each BFD section in an ELF file.  This
1233    structure is allocated by elf_new_section_hook.  */
1234
1235 struct bfd_elf_section_data
1236 {
1237   /* The ELF header for this section.  */
1238   Elf_Internal_Shdr this_hdr;
1239
1240   /* The ELF header for the reloc section associated with this
1241      section, if any.  */
1242   Elf_Internal_Shdr rel_hdr;
1243
1244   /* If there is a second reloc section associated with this section,
1245      as can happen on Irix 6, this field points to the header.  */
1246   Elf_Internal_Shdr *rel_hdr2;
1247
1248   /* The number of relocations currently assigned to REL_HDR.  */
1249   unsigned int rel_count;
1250
1251   /* The number of relocations currently assigned to REL_HDR2.  */
1252   unsigned int rel_count2;
1253
1254   /* The ELF section number of this section.  */
1255   int this_idx;
1256
1257   /* The ELF section number of the reloc section indicated by
1258      REL_HDR if any.  Only used for an output file.  */
1259   int rel_idx;
1260
1261   /* The ELF section number of the reloc section indicated by
1262      REL_HDR2 if any.  Only used for an output file.  */
1263   int rel_idx2;
1264
1265   /* Used by the backend linker when generating a shared library to
1266      record the dynamic symbol index for a section symbol
1267      corresponding to this section.  A value of 0 means that there is
1268      no dynamic symbol for this section.  */
1269   int dynindx;
1270
1271   /* A pointer to the linked-to section for SHF_LINK_ORDER.  */
1272   asection *linked_to;
1273
1274   /* Used by the backend linker to store the symbol hash table entries
1275      associated with relocs against global symbols.  */
1276   struct elf_link_hash_entry **rel_hashes;
1277
1278   /* A pointer to the swapped relocs.  If the section uses REL relocs,
1279      rather than RELA, all the r_addend fields will be zero.  This
1280      pointer may be NULL.  It is used by the backend linker.  */
1281   Elf_Internal_Rela *relocs;
1282
1283   /* A pointer to a linked list tracking dynamic relocs copied for
1284      local symbols.  */
1285   void *local_dynrel;
1286
1287   /* A pointer to the bfd section used for dynamic relocs.  */
1288   asection *sreloc;
1289
1290   /* A pointer to the bfd section used for dynamic relocs against ifunc symbols.  */
1291   asection *indirect_relocs;
1292
1293   union {
1294     /* Group name, if this section is a member of a group.  */
1295     const char *name;
1296
1297     /* Group signature sym, if this is the SHT_GROUP section.  */
1298     struct bfd_symbol *id;
1299   } group;
1300
1301   /* For a member of a group, points to the SHT_GROUP section.
1302      NULL for the SHT_GROUP section itself and non-group sections.  */
1303   asection *sec_group;
1304
1305   /* A linked list of member sections in the group.  Circular when used by
1306      the linker.  For the SHT_GROUP section, points at first member.  */
1307   asection *next_in_group;
1308
1309   /* The FDEs associated with this section.  The u.fde.next_in_section
1310      field acts as a chain pointer.  */
1311   struct eh_cie_fde *fde_list;
1312
1313   /* A pointer used for various section optimizations.  */
1314   void *sec_info;
1315 };
1316
1317 #define elf_section_data(sec)  ((struct bfd_elf_section_data*)(sec)->used_by_bfd)
1318 #define elf_linked_to_section(sec) (elf_section_data(sec)->linked_to)
1319 #define elf_section_type(sec)  (elf_section_data(sec)->this_hdr.sh_type)
1320 #define elf_section_flags(sec) (elf_section_data(sec)->this_hdr.sh_flags)
1321 #define elf_group_name(sec)    (elf_section_data(sec)->group.name)
1322 #define elf_group_id(sec)      (elf_section_data(sec)->group.id)
1323 #define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group)
1324 #define elf_fde_list(sec)      (elf_section_data(sec)->fde_list)
1325 #define elf_sec_group(sec)      (elf_section_data(sec)->sec_group)
1326
1327 #define xvec_get_elf_backend_data(xvec) \
1328   ((const struct elf_backend_data *) (xvec)->backend_data)
1329
1330 #define get_elf_backend_data(abfd) \
1331    xvec_get_elf_backend_data ((abfd)->xvec)
1332
1333 /* This struct is used to pass information to routines called via
1334    elf_link_hash_traverse which must return failure.  */
1335
1336 struct elf_info_failed
1337 {
1338   bfd_boolean failed;
1339   struct bfd_link_info *info;
1340   struct bfd_elf_version_tree *verdefs;
1341 };
1342
1343 /* This structure is used to pass information to
1344    _bfd_elf_link_assign_sym_version.  */
1345
1346 struct elf_assign_sym_version_info
1347 {
1348   /* Output BFD.  */
1349   bfd *output_bfd;
1350   /* General link information.  */
1351   struct bfd_link_info *info;
1352   /* Version tree.  */
1353   struct bfd_elf_version_tree *verdefs;
1354   /* Whether we had a failure.  */
1355   bfd_boolean failed;
1356 };
1357
1358 /* This structure is used to pass information to
1359    _bfd_elf_link_find_version_dependencies.  */
1360
1361 struct elf_find_verdep_info
1362 {
1363   /* Output BFD.  */
1364   bfd *output_bfd;
1365   /* General link information.  */
1366   struct bfd_link_info *info;
1367   /* The number of dependencies.  */
1368   unsigned int vers;
1369   /* Whether we had a failure.  */
1370   bfd_boolean failed;
1371 };
1372
1373 /* The maximum number of known object attributes for any target.  */
1374 #define NUM_KNOWN_OBJ_ATTRIBUTES 32
1375
1376 /* The value of an object attribute.  type & 1 indicates whether there
1377    is an integer value; type & 2 indicates whether there is a string
1378    value.  */
1379
1380 typedef struct obj_attribute
1381 {
1382   int type;
1383   unsigned int i;
1384   char *s;
1385 } obj_attribute;
1386
1387 typedef struct obj_attribute_list
1388 {
1389   struct obj_attribute_list *next;
1390   int tag;
1391   obj_attribute attr;
1392 } obj_attribute_list;
1393
1394 /* Object attributes may either be defined by the processor ABI, index
1395    OBJ_ATTR_PROC in the *_obj_attributes arrays, or be GNU-specific
1396    (and possibly also processor-specific), index OBJ_ATTR_GNU.  */
1397 #define OBJ_ATTR_PROC 0
1398 #define OBJ_ATTR_GNU 1
1399 #define OBJ_ATTR_FIRST OBJ_ATTR_PROC
1400 #define OBJ_ATTR_LAST OBJ_ATTR_GNU
1401
1402 /* The following object attribute tags are taken as generic, for all
1403    targets and for "gnu" where there is no target standard.  */
1404 enum
1405 {
1406   Tag_NULL = 0,
1407   Tag_File = 1,
1408   Tag_Section = 2,
1409   Tag_Symbol = 3,
1410   Tag_compatibility = 32
1411 };
1412
1413 /* Enum used to identify target specific extensions to the elf_obj_tdata
1414    structure.  Note the enums deliberately start from 1 so that we can
1415    detect an uninitialized field.  The generic value is last so that
1416    additions to this enum do not need to modify more than one line.  */
1417 enum elf_object_id
1418 {
1419   ALPHA_ELF_TDATA = 1,
1420   ARM_ELF_TDATA,
1421   HPPA_ELF_TDATA,
1422   I386_ELF_TDATA,
1423   MIPS_ELF_TDATA,
1424   PPC32_ELF_TDATA,
1425   PPC64_ELF_TDATA,
1426   S390_ELF_TDATA,
1427   SH_ELF_TDATA,
1428   SPARC_ELF_TDATA,
1429   X86_64_ELF_TDATA,
1430   XTENSA_ELF_TDATA,
1431   GENERIC_ELF_TDATA
1432 };
1433
1434 /* Some private data is stashed away for future use using the tdata pointer
1435    in the bfd structure.  */
1436
1437 struct elf_obj_tdata
1438 {
1439   Elf_Internal_Ehdr elf_header[1];      /* Actual data, but ref like ptr */
1440   Elf_Internal_Shdr **elf_sect_ptr;
1441   Elf_Internal_Phdr *phdr;
1442   struct elf_segment_map *segment_map;
1443   struct elf_strtab_hash *strtab_ptr;
1444   int num_locals;
1445   int num_globals;
1446   unsigned int num_elf_sections;        /* elf_sect_ptr size */
1447   int num_section_syms;
1448   asymbol **section_syms;               /* STT_SECTION symbols for each section */
1449   Elf_Internal_Shdr symtab_hdr;
1450   Elf_Internal_Shdr shstrtab_hdr;
1451   Elf_Internal_Shdr strtab_hdr;
1452   Elf_Internal_Shdr dynsymtab_hdr;
1453   Elf_Internal_Shdr dynstrtab_hdr;
1454   Elf_Internal_Shdr dynversym_hdr;
1455   Elf_Internal_Shdr dynverref_hdr;
1456   Elf_Internal_Shdr dynverdef_hdr;
1457   Elf_Internal_Shdr symtab_shndx_hdr;
1458   unsigned int symtab_section, shstrtab_section;
1459   unsigned int strtab_section, dynsymtab_section;
1460   unsigned int symtab_shndx_section;
1461   unsigned int dynversym_section, dynverdef_section, dynverref_section;
1462   file_ptr next_file_pos;
1463   bfd_vma gp;                           /* The gp value */
1464   unsigned int gp_size;                 /* The gp size */
1465
1466   /* Information grabbed from an elf core file.  */
1467   int core_signal;
1468   int core_pid;
1469   int core_lwpid;
1470   char* core_program;
1471   char* core_command;
1472
1473   /* A mapping from external symbols to entries in the linker hash
1474      table, used when linking.  This is indexed by the symbol index
1475      minus the sh_info field of the symbol table header.  */
1476   struct elf_link_hash_entry **sym_hashes;
1477
1478   /* Track usage and final offsets of GOT entries for local symbols.
1479      This array is indexed by symbol index.  Elements are used
1480      identically to "got" in struct elf_link_hash_entry.  */
1481   union
1482     {
1483       bfd_signed_vma *refcounts;
1484       bfd_vma *offsets;
1485       struct got_entry **ents;
1486     } local_got;
1487
1488   /* The linker ELF emulation code needs to let the backend ELF linker
1489      know what filename should be used for a dynamic object if the
1490      dynamic object is found using a search.  The emulation code then
1491      sometimes needs to know what name was actually used.  Until the
1492      file has been added to the linker symbol table, this field holds
1493      the name the linker wants.  After it has been added, it holds the
1494      name actually used, which will be the DT_SONAME entry if there is
1495      one.  */
1496   const char *dt_name;
1497
1498   /* Records the result of `get_program_header_size'.  */
1499   bfd_size_type program_header_size;
1500
1501   /* Used by find_nearest_line entry point.  */
1502   void *line_info;
1503
1504   /* Used by MIPS ELF find_nearest_line entry point.  The structure
1505      could be included directly in this one, but there's no point to
1506      wasting the memory just for the infrequently called
1507      find_nearest_line.  */
1508   struct mips_elf_find_line *find_line_info;
1509
1510   /* A place to stash dwarf1 info for this bfd.  */
1511   struct dwarf1_debug *dwarf1_find_line_info;
1512
1513   /* A place to stash dwarf2 info for this bfd.  */
1514   void *dwarf2_find_line_info;
1515
1516   /* An array of stub sections indexed by symbol number, used by the
1517      MIPS ELF linker.  FIXME: We should figure out some way to only
1518      include this field for a MIPS ELF target.  */
1519   asection **local_stubs;
1520   asection **local_call_stubs;
1521
1522   /* Used to determine if PT_GNU_EH_FRAME segment header should be
1523      created.  */
1524   asection *eh_frame_hdr;
1525
1526   Elf_Internal_Shdr **group_sect_ptr;
1527   int num_group;
1528
1529   /* Number of symbol version definitions we are about to emit.  */
1530   unsigned int cverdefs;
1531
1532   /* Number of symbol version references we are about to emit.  */
1533   unsigned int cverrefs;
1534
1535   /* Segment flags for the PT_GNU_STACK segment.  */
1536   unsigned int stack_flags;
1537
1538   /* Symbol version definitions in external objects.  */
1539   Elf_Internal_Verdef *verdef;
1540
1541   /* Symbol version references to external objects.  */
1542   Elf_Internal_Verneed *verref;
1543
1544   /* The Irix 5 support uses two virtual sections, which represent
1545      text/data symbols defined in dynamic objects.  */
1546   asymbol *elf_data_symbol;
1547   asymbol *elf_text_symbol;
1548   asection *elf_data_section;
1549   asection *elf_text_section;
1550
1551   /* A pointer to the .eh_frame section.  */
1552   asection *eh_frame_section;
1553
1554   /* Whether a dyanmic object was specified normally on the linker
1555      command line, or was specified when --as-needed was in effect,
1556      or was found via a DT_NEEDED entry.  */
1557   enum dynamic_lib_link_class dyn_lib_class;
1558
1559   /* This is set to TRUE if the object was created by the backend
1560      linker.  */
1561   bfd_boolean linker;
1562
1563   /* Irix 5 often screws up the symbol table, sorting local symbols
1564      after global symbols.  This flag is set if the symbol table in
1565      this BFD appears to be screwed up.  If it is, we ignore the
1566      sh_info field in the symbol table header, and always read all the
1567      symbols.  */
1568   bfd_boolean bad_symtab;
1569
1570   /* Used to determine if the e_flags field has been initialized */
1571   bfd_boolean flags_init;
1572
1573   /* Symbol buffer.  */
1574   void *symbuf;
1575
1576   obj_attribute known_obj_attributes[2][NUM_KNOWN_OBJ_ATTRIBUTES];
1577   obj_attribute_list *other_obj_attributes[2];
1578
1579   /* Called at the end of _bfd_elf_write_object_contents if not NULL.  */
1580   bfd_boolean (*after_write_object_contents) (bfd *);
1581   void *after_write_object_contents_info;
1582
1583   /* NT_GNU_BUILD_ID note type.  */
1584   bfd_size_type build_id_size;
1585   bfd_byte *build_id;
1586
1587   /* An identifier used to distinguish different target
1588      specific extensions to this structure.  */
1589   enum elf_object_id object_id;
1590 };
1591
1592 #define elf_tdata(bfd)          ((bfd) -> tdata.elf_obj_data)
1593
1594 #define elf_object_id(bfd)      (elf_tdata(bfd) -> object_id)
1595 #define elf_program_header_size(bfd) (elf_tdata(bfd) -> program_header_size)
1596 #define elf_elfheader(bfd)      (elf_tdata(bfd) -> elf_header)
1597 #define elf_elfsections(bfd)    (elf_tdata(bfd) -> elf_sect_ptr)
1598 #define elf_numsections(bfd)    (elf_tdata(bfd) -> num_elf_sections)
1599 #define elf_shstrtab(bfd)       (elf_tdata(bfd) -> strtab_ptr)
1600 #define elf_onesymtab(bfd)      (elf_tdata(bfd) -> symtab_section)
1601 #define elf_symtab_shndx(bfd)   (elf_tdata(bfd) -> symtab_shndx_section)
1602 #define elf_symtab_hdr(bfd)     (elf_tdata(bfd) -> symtab_hdr)
1603 #define elf_dynsymtab(bfd)      (elf_tdata(bfd) -> dynsymtab_section)
1604 #define elf_dynversym(bfd)      (elf_tdata(bfd) -> dynversym_section)
1605 #define elf_dynverdef(bfd)      (elf_tdata(bfd) -> dynverdef_section)
1606 #define elf_dynverref(bfd)      (elf_tdata(bfd) -> dynverref_section)
1607 #define elf_eh_frame_section(bfd) \
1608                                 (elf_tdata(bfd) -> eh_frame_section)
1609 #define elf_num_locals(bfd)     (elf_tdata(bfd) -> num_locals)
1610 #define elf_num_globals(bfd)    (elf_tdata(bfd) -> num_globals)
1611 #define elf_section_syms(bfd)   (elf_tdata(bfd) -> section_syms)
1612 #define elf_num_section_syms(bfd) (elf_tdata(bfd) -> num_section_syms)
1613 #define core_prpsinfo(bfd)      (elf_tdata(bfd) -> prpsinfo)
1614 #define core_prstatus(bfd)      (elf_tdata(bfd) -> prstatus)
1615 #define elf_gp(bfd)             (elf_tdata(bfd) -> gp)
1616 #define elf_gp_size(bfd)        (elf_tdata(bfd) -> gp_size)
1617 #define elf_sym_hashes(bfd)     (elf_tdata(bfd) -> sym_hashes)
1618 #define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts)
1619 #define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets)
1620 #define elf_local_got_ents(bfd) (elf_tdata(bfd) -> local_got.ents)
1621 #define elf_dt_name(bfd)        (elf_tdata(bfd) -> dt_name)
1622 #define elf_dyn_lib_class(bfd)  (elf_tdata(bfd) -> dyn_lib_class)
1623 #define elf_bad_symtab(bfd)     (elf_tdata(bfd) -> bad_symtab)
1624 #define elf_flags_init(bfd)     (elf_tdata(bfd) -> flags_init)
1625 #define elf_known_obj_attributes(bfd) (elf_tdata (bfd) -> known_obj_attributes)
1626 #define elf_other_obj_attributes(bfd) (elf_tdata (bfd) -> other_obj_attributes)
1627 #define elf_known_obj_attributes_proc(bfd) \
1628   (elf_known_obj_attributes (bfd) [OBJ_ATTR_PROC])
1629 #define elf_other_obj_attributes_proc(bfd) \
1630   (elf_other_obj_attributes (bfd) [OBJ_ATTR_PROC])
1631 \f
1632 extern void _bfd_elf_swap_verdef_in
1633   (bfd *, const Elf_External_Verdef *, Elf_Internal_Verdef *);
1634 extern void _bfd_elf_swap_verdef_out
1635   (bfd *, const Elf_Internal_Verdef *, Elf_External_Verdef *);
1636 extern void _bfd_elf_swap_verdaux_in
1637   (bfd *, const Elf_External_Verdaux *, Elf_Internal_Verdaux *);
1638 extern void _bfd_elf_swap_verdaux_out
1639   (bfd *, const Elf_Internal_Verdaux *, Elf_External_Verdaux *);
1640 extern void _bfd_elf_swap_verneed_in
1641   (bfd *, const Elf_External_Verneed *, Elf_Internal_Verneed *);
1642 extern void _bfd_elf_swap_verneed_out
1643   (bfd *, const Elf_Internal_Verneed *, Elf_External_Verneed *);
1644 extern void _bfd_elf_swap_vernaux_in
1645   (bfd *, const Elf_External_Vernaux *, Elf_Internal_Vernaux *);
1646 extern void _bfd_elf_swap_vernaux_out
1647   (bfd *, const Elf_Internal_Vernaux *, Elf_External_Vernaux *);
1648 extern void _bfd_elf_swap_versym_in
1649   (bfd *, const Elf_External_Versym *, Elf_Internal_Versym *);
1650 extern void _bfd_elf_swap_versym_out
1651   (bfd *, const Elf_Internal_Versym *, Elf_External_Versym *);
1652
1653 extern unsigned int _bfd_elf_section_from_bfd_section
1654   (bfd *, asection *);
1655 extern char *bfd_elf_string_from_elf_section
1656   (bfd *, unsigned, unsigned);
1657 extern char *bfd_elf_get_str_section
1658   (bfd *, unsigned);
1659 extern Elf_Internal_Sym *bfd_elf_get_elf_syms
1660   (bfd *, Elf_Internal_Shdr *, size_t, size_t, Elf_Internal_Sym *, void *,
1661    Elf_External_Sym_Shndx *);
1662 extern const char *bfd_elf_sym_name
1663   (bfd *, Elf_Internal_Shdr *, Elf_Internal_Sym *, asection *);
1664
1665 extern bfd_boolean _bfd_elf_copy_private_bfd_data
1666   (bfd *, bfd *);
1667 extern bfd_boolean _bfd_elf_print_private_bfd_data
1668   (bfd *, void *);
1669 extern void bfd_elf_print_symbol
1670   (bfd *, void *, asymbol *, bfd_print_symbol_type);
1671
1672 extern unsigned int _bfd_elf_eh_frame_address_size
1673   (bfd *, asection *);
1674 extern bfd_byte _bfd_elf_encode_eh_address
1675   (bfd *abfd, struct bfd_link_info *info, asection *osec, bfd_vma offset,
1676    asection *loc_sec, bfd_vma loc_offset, bfd_vma *encoded);
1677 extern bfd_boolean _bfd_elf_can_make_relative
1678   (bfd *input_bfd, struct bfd_link_info *info, asection *eh_frame_section);
1679
1680 extern enum elf_reloc_type_class _bfd_elf_reloc_type_class
1681   (const Elf_Internal_Rela *);
1682 extern bfd_vma _bfd_elf_rela_local_sym
1683   (bfd *, Elf_Internal_Sym *, asection **, Elf_Internal_Rela *);
1684 extern bfd_vma _bfd_elf_rel_local_sym
1685   (bfd *, Elf_Internal_Sym *, asection **, bfd_vma);
1686 extern bfd_vma _bfd_elf_section_offset
1687   (bfd *, struct bfd_link_info *, asection *, bfd_vma);
1688
1689 extern unsigned long bfd_elf_hash
1690   (const char *);
1691 extern unsigned long bfd_elf_gnu_hash
1692   (const char *);
1693
1694 extern bfd_reloc_status_type bfd_elf_generic_reloc
1695   (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
1696 extern bfd_boolean bfd_elf_allocate_object
1697   (bfd *, size_t, enum elf_object_id);
1698 extern bfd_boolean bfd_elf_make_generic_object
1699   (bfd *);
1700 extern bfd_boolean bfd_elf_mkcorefile
1701   (bfd *);
1702 extern Elf_Internal_Shdr *bfd_elf_find_section
1703   (bfd *, char *);
1704 extern bfd_boolean _bfd_elf_make_section_from_shdr
1705   (bfd *, Elf_Internal_Shdr *, const char *, int);
1706 extern bfd_boolean _bfd_elf_make_section_from_phdr
1707   (bfd *, Elf_Internal_Phdr *, int, const char *);
1708 extern struct bfd_hash_entry *_bfd_elf_link_hash_newfunc
1709   (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
1710 extern struct bfd_link_hash_table *_bfd_elf_link_hash_table_create
1711   (bfd *);
1712 extern void _bfd_elf_link_hash_copy_indirect
1713   (struct bfd_link_info *, struct elf_link_hash_entry *,
1714    struct elf_link_hash_entry *);
1715 extern void _bfd_elf_link_hash_hide_symbol
1716   (struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean);
1717 extern bfd_boolean _bfd_elf_link_hash_fixup_symbol
1718   (struct bfd_link_info *, struct elf_link_hash_entry *);
1719 extern bfd_boolean _bfd_elf_link_hash_table_init
1720   (struct elf_link_hash_table *, bfd *,
1721    struct bfd_hash_entry *(*)
1722      (struct bfd_hash_entry *, struct bfd_hash_table *, const char *),
1723    unsigned int);
1724 extern bfd_boolean _bfd_elf_slurp_version_tables
1725   (bfd *, bfd_boolean);
1726 extern bfd_boolean _bfd_elf_merge_sections
1727   (bfd *, struct bfd_link_info *);
1728 extern bfd_boolean _bfd_elf_match_sections_by_type
1729   (bfd *, const asection *, bfd *, const asection *);
1730 extern bfd_boolean bfd_elf_is_group_section
1731   (bfd *, const struct bfd_section *);
1732 extern void _bfd_elf_section_already_linked
1733   (bfd *, struct bfd_section *, struct bfd_link_info *);
1734 extern void bfd_elf_set_group_contents
1735   (bfd *, asection *, void *);
1736 extern asection *_bfd_elf_check_kept_section
1737   (asection *, struct bfd_link_info *);
1738 extern void _bfd_elf_link_just_syms
1739   (asection *, struct bfd_link_info *);
1740 extern bfd_boolean _bfd_elf_copy_private_header_data
1741   (bfd *, bfd *);
1742 extern bfd_boolean _bfd_elf_copy_private_symbol_data
1743   (bfd *, asymbol *, bfd *, asymbol *);
1744 #define _bfd_generic_init_private_section_data \
1745   _bfd_elf_init_private_section_data
1746 extern bfd_boolean _bfd_elf_init_private_section_data
1747   (bfd *, asection *, bfd *, asection *, struct bfd_link_info *);
1748 extern bfd_boolean _bfd_elf_copy_private_section_data
1749   (bfd *, asection *, bfd *, asection *);
1750 extern bfd_boolean _bfd_elf_write_object_contents
1751   (bfd *);
1752 extern bfd_boolean _bfd_elf_write_corefile_contents
1753   (bfd *);
1754 extern bfd_boolean _bfd_elf_set_section_contents
1755   (bfd *, sec_ptr, const void *, file_ptr, bfd_size_type);
1756 extern long _bfd_elf_get_symtab_upper_bound
1757   (bfd *);
1758 extern long _bfd_elf_canonicalize_symtab
1759   (bfd *, asymbol **);
1760 extern long _bfd_elf_get_dynamic_symtab_upper_bound
1761   (bfd *);
1762 extern long _bfd_elf_canonicalize_dynamic_symtab
1763   (bfd *, asymbol **);
1764 extern long _bfd_elf_get_synthetic_symtab
1765   (bfd *, long, asymbol **, long, asymbol **, asymbol **);
1766 extern long _bfd_elf_get_reloc_upper_bound
1767   (bfd *, sec_ptr);
1768 extern long _bfd_elf_canonicalize_reloc
1769   (bfd *, sec_ptr, arelent **, asymbol **);
1770 extern asection * _bfd_elf_get_dynamic_reloc_section
1771   (bfd *, asection *, bfd_boolean);
1772 extern asection * _bfd_elf_make_dynamic_reloc_section
1773   (asection *, bfd *, unsigned int, bfd *, bfd_boolean);
1774 extern asection * _bfd_elf_make_ifunc_reloc_section
1775   (bfd *, asection *, bfd *, unsigned int);
1776 extern long _bfd_elf_get_dynamic_reloc_upper_bound
1777   (bfd *);
1778 extern long _bfd_elf_canonicalize_dynamic_reloc
1779   (bfd *, arelent **, asymbol **);
1780 extern asymbol *_bfd_elf_make_empty_symbol
1781   (bfd *);
1782 extern void _bfd_elf_get_symbol_info
1783   (bfd *, asymbol *, symbol_info *);
1784 extern bfd_boolean _bfd_elf_is_local_label_name
1785   (bfd *, const char *);
1786 extern alent *_bfd_elf_get_lineno
1787   (bfd *, asymbol *);
1788 extern bfd_boolean _bfd_elf_set_arch_mach
1789   (bfd *, enum bfd_architecture, unsigned long);
1790 extern bfd_boolean _bfd_elf_find_nearest_line
1791   (bfd *, asection *, asymbol **, bfd_vma, const char **, const char **,
1792    unsigned int *);
1793 extern bfd_boolean _bfd_elf_find_line
1794   (bfd *, asymbol **, asymbol *, const char **, unsigned int *);
1795 #define _bfd_generic_find_line _bfd_elf_find_line
1796 extern bfd_boolean _bfd_elf_find_inliner_info
1797   (bfd *, const char **, const char **, unsigned int *);
1798 #define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols
1799 #define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol
1800 extern int _bfd_elf_sizeof_headers
1801   (bfd *, struct bfd_link_info *);
1802 extern bfd_boolean _bfd_elf_new_section_hook
1803   (bfd *, asection *);
1804 extern bfd_boolean _bfd_elf_init_reloc_shdr
1805   (bfd *, Elf_Internal_Shdr *, asection *, bfd_boolean);
1806 extern const struct bfd_elf_special_section *_bfd_elf_get_special_section
1807   (const char *, const struct bfd_elf_special_section *, unsigned int);
1808 extern const struct bfd_elf_special_section *_bfd_elf_get_sec_type_attr
1809   (bfd *, asection *);
1810
1811 /* If the target doesn't have reloc handling written yet:  */
1812 extern void _bfd_elf_no_info_to_howto
1813   (bfd *, arelent *, Elf_Internal_Rela *);
1814
1815 extern bfd_boolean bfd_section_from_shdr
1816   (bfd *, unsigned int shindex);
1817 extern bfd_boolean bfd_section_from_phdr
1818   (bfd *, Elf_Internal_Phdr *, int);
1819
1820 extern int _bfd_elf_symbol_from_bfd_symbol
1821   (bfd *, asymbol **);
1822
1823 extern asection *bfd_section_from_r_symndx
1824   (bfd *, struct sym_sec_cache *, asection *, unsigned long);
1825 extern asection *bfd_section_from_elf_index
1826   (bfd *, unsigned int);
1827 extern struct bfd_strtab_hash *_bfd_elf_stringtab_init
1828   (void);
1829
1830 extern struct elf_strtab_hash * _bfd_elf_strtab_init
1831   (void);
1832 extern void _bfd_elf_strtab_free
1833   (struct elf_strtab_hash *);
1834 extern bfd_size_type _bfd_elf_strtab_add
1835   (struct elf_strtab_hash *, const char *, bfd_boolean);
1836 extern void _bfd_elf_strtab_addref
1837   (struct elf_strtab_hash *, bfd_size_type);
1838 extern void _bfd_elf_strtab_delref
1839   (struct elf_strtab_hash *, bfd_size_type);
1840 extern void _bfd_elf_strtab_clear_all_refs
1841   (struct elf_strtab_hash *);
1842 extern bfd_size_type _bfd_elf_strtab_size
1843   (struct elf_strtab_hash *);
1844 extern bfd_size_type _bfd_elf_strtab_offset
1845   (struct elf_strtab_hash *, bfd_size_type);
1846 extern bfd_boolean _bfd_elf_strtab_emit
1847   (bfd *, struct elf_strtab_hash *);
1848 extern void _bfd_elf_strtab_finalize
1849   (struct elf_strtab_hash *);
1850
1851 extern void _bfd_elf_begin_eh_frame_parsing
1852   (struct bfd_link_info *info);
1853 extern void _bfd_elf_parse_eh_frame
1854   (bfd *, struct bfd_link_info *, asection *, struct elf_reloc_cookie *);
1855 extern void _bfd_elf_end_eh_frame_parsing
1856   (struct bfd_link_info *info);
1857
1858 extern bfd_boolean _bfd_elf_discard_section_eh_frame
1859   (bfd *, struct bfd_link_info *, asection *,
1860    bfd_boolean (*) (bfd_vma, void *), struct elf_reloc_cookie *);
1861 extern bfd_boolean _bfd_elf_discard_section_eh_frame_hdr
1862   (bfd *, struct bfd_link_info *);
1863 extern bfd_vma _bfd_elf_eh_frame_section_offset
1864   (bfd *, struct bfd_link_info *, asection *, bfd_vma);
1865 extern bfd_boolean _bfd_elf_write_section_eh_frame
1866   (bfd *, struct bfd_link_info *, asection *, bfd_byte *);
1867 extern bfd_boolean _bfd_elf_write_section_eh_frame_hdr
1868   (bfd *, struct bfd_link_info *);
1869 extern bfd_boolean _bfd_elf_maybe_strip_eh_frame_hdr
1870   (struct bfd_link_info *);
1871
1872 extern bfd_boolean _bfd_elf_merge_symbol
1873   (bfd *, struct bfd_link_info *, const char *, Elf_Internal_Sym *,
1874    asection **, bfd_vma *, unsigned int *,
1875    struct elf_link_hash_entry **, bfd_boolean *,
1876    bfd_boolean *, bfd_boolean *, bfd_boolean *);
1877
1878 extern bfd_boolean _bfd_elf_hash_symbol (struct elf_link_hash_entry *);
1879
1880 extern bfd_boolean _bfd_elf_add_default_symbol
1881   (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
1882    const char *, Elf_Internal_Sym *, asection **, bfd_vma *,
1883    bfd_boolean *, bfd_boolean);
1884
1885 extern bfd_boolean _bfd_elf_export_symbol
1886   (struct elf_link_hash_entry *, void *);
1887
1888 extern bfd_boolean _bfd_elf_link_find_version_dependencies
1889   (struct elf_link_hash_entry *, void *);
1890
1891 extern bfd_boolean _bfd_elf_link_assign_sym_version
1892   (struct elf_link_hash_entry *, void *);
1893
1894 extern long _bfd_elf_link_lookup_local_dynindx
1895   (struct bfd_link_info *, bfd *, long);
1896 extern bfd_boolean _bfd_elf_compute_section_file_positions
1897   (bfd *, struct bfd_link_info *);
1898 extern void _bfd_elf_assign_file_positions_for_relocs
1899   (bfd *);
1900 extern file_ptr _bfd_elf_assign_file_position_for_section
1901   (Elf_Internal_Shdr *, file_ptr, bfd_boolean);
1902
1903 extern bfd_boolean _bfd_elf_validate_reloc
1904   (bfd *, arelent *);
1905
1906 extern bfd_boolean _bfd_elf_link_create_dynamic_sections
1907   (bfd *, struct bfd_link_info *);
1908 extern bfd_boolean _bfd_elf_link_omit_section_dynsym
1909   (bfd *, struct bfd_link_info *, asection *);
1910 extern bfd_boolean _bfd_elf_create_dynamic_sections
1911   (bfd *, struct bfd_link_info *);
1912 extern bfd_boolean _bfd_elf_create_got_section
1913   (bfd *, struct bfd_link_info *);
1914 extern struct elf_link_hash_entry *_bfd_elf_define_linkage_sym
1915   (bfd *, struct bfd_link_info *, asection *, const char *);
1916 extern void _bfd_elf_init_1_index_section
1917   (bfd *, struct bfd_link_info *);
1918 extern void _bfd_elf_init_2_index_sections
1919   (bfd *, struct bfd_link_info *);
1920
1921 extern bfd_boolean _bfd_elfcore_make_pseudosection
1922   (bfd *, char *, size_t, ufile_ptr);
1923 extern char *_bfd_elfcore_strndup
1924   (bfd *, char *, size_t);
1925
1926 extern Elf_Internal_Rela *_bfd_elf_link_read_relocs
1927   (bfd *, asection *, void *, Elf_Internal_Rela *, bfd_boolean);
1928
1929 extern bfd_boolean _bfd_elf_link_size_reloc_section
1930   (bfd *, Elf_Internal_Shdr *, asection *);
1931
1932 extern bfd_boolean _bfd_elf_link_output_relocs
1933   (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *,
1934    struct elf_link_hash_entry **);
1935
1936 extern bfd_boolean _bfd_elf_fix_symbol_flags
1937   (struct elf_link_hash_entry *, struct elf_info_failed *);
1938
1939 extern bfd_boolean _bfd_elf_adjust_dynamic_symbol
1940   (struct elf_link_hash_entry *, void *);
1941
1942 extern bfd_boolean _bfd_elf_adjust_dynamic_copy
1943   (struct elf_link_hash_entry *, asection *);
1944
1945 extern bfd_boolean _bfd_elf_link_sec_merge_syms
1946   (struct elf_link_hash_entry *, void *);
1947
1948 extern bfd_boolean _bfd_elf_dynamic_symbol_p
1949   (struct elf_link_hash_entry *, struct bfd_link_info *, bfd_boolean);
1950
1951 extern bfd_boolean _bfd_elf_symbol_refs_local_p
1952   (struct elf_link_hash_entry *, struct bfd_link_info *, bfd_boolean);
1953
1954 extern bfd_reloc_status_type bfd_elf_perform_complex_relocation
1955   (bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, bfd_vma);
1956
1957 extern bfd_boolean _bfd_elf_setup_sections
1958   (bfd *);
1959
1960 extern void _bfd_elf_set_osabi (bfd * , struct bfd_link_info *);
1961
1962 extern const bfd_target *bfd_elf32_object_p
1963   (bfd *);
1964 extern const bfd_target *bfd_elf32_core_file_p
1965   (bfd *);
1966 extern char *bfd_elf32_core_file_failing_command
1967   (bfd *);
1968 extern int bfd_elf32_core_file_failing_signal
1969   (bfd *);
1970 extern bfd_boolean bfd_elf32_core_file_matches_executable_p
1971   (bfd *, bfd *);
1972
1973 extern bfd_boolean bfd_elf32_swap_symbol_in
1974   (bfd *, const void *, const void *, Elf_Internal_Sym *);
1975 extern void bfd_elf32_swap_symbol_out
1976   (bfd *, const Elf_Internal_Sym *, void *, void *);
1977 extern void bfd_elf32_swap_reloc_in
1978   (bfd *, const bfd_byte *, Elf_Internal_Rela *);
1979 extern void bfd_elf32_swap_reloc_out
1980   (bfd *, const Elf_Internal_Rela *, bfd_byte *);
1981 extern void bfd_elf32_swap_reloca_in
1982   (bfd *, const bfd_byte *, Elf_Internal_Rela *);
1983 extern void bfd_elf32_swap_reloca_out
1984   (bfd *, const Elf_Internal_Rela *, bfd_byte *);
1985 extern void bfd_elf32_swap_phdr_in
1986   (bfd *, const Elf32_External_Phdr *, Elf_Internal_Phdr *);
1987 extern void bfd_elf32_swap_phdr_out
1988   (bfd *, const Elf_Internal_Phdr *, Elf32_External_Phdr *);
1989 extern void bfd_elf32_swap_dyn_in
1990   (bfd *, const void *, Elf_Internal_Dyn *);
1991 extern void bfd_elf32_swap_dyn_out
1992   (bfd *, const Elf_Internal_Dyn *, void *);
1993 extern long bfd_elf32_slurp_symbol_table
1994   (bfd *, asymbol **, bfd_boolean);
1995 extern bfd_boolean bfd_elf32_write_shdrs_and_ehdr
1996   (bfd *);
1997 extern int bfd_elf32_write_out_phdrs
1998   (bfd *, const Elf_Internal_Phdr *, unsigned int);
1999 extern bfd_boolean bfd_elf32_checksum_contents
2000   (bfd * , void (*) (const void *, size_t, void *), void *);
2001 extern void bfd_elf32_write_relocs
2002   (bfd *, asection *, void *);
2003 extern bfd_boolean bfd_elf32_slurp_reloc_table
2004   (bfd *, asection *, asymbol **, bfd_boolean);
2005
2006 extern const bfd_target *bfd_elf64_object_p
2007   (bfd *);
2008 extern const bfd_target *bfd_elf64_core_file_p
2009   (bfd *);
2010 extern char *bfd_elf64_core_file_failing_command
2011   (bfd *);
2012 extern int bfd_elf64_core_file_failing_signal
2013   (bfd *);
2014 extern bfd_boolean bfd_elf64_core_file_matches_executable_p
2015   (bfd *, bfd *);
2016
2017 extern bfd_boolean bfd_elf64_swap_symbol_in
2018   (bfd *, const void *, const void *, Elf_Internal_Sym *);
2019 extern void bfd_elf64_swap_symbol_out
2020   (bfd *, const Elf_Internal_Sym *, void *, void *);
2021 extern void bfd_elf64_swap_reloc_in
2022   (bfd *, const bfd_byte *, Elf_Internal_Rela *);
2023 extern void bfd_elf64_swap_reloc_out
2024   (bfd *, const Elf_Internal_Rela *, bfd_byte *);
2025 extern void bfd_elf64_swap_reloca_in
2026   (bfd *, const bfd_byte *, Elf_Internal_Rela *);
2027 extern void bfd_elf64_swap_reloca_out
2028   (bfd *, const Elf_Internal_Rela *, bfd_byte *);
2029 extern void bfd_elf64_swap_phdr_in
2030   (bfd *, const Elf64_External_Phdr *, Elf_Internal_Phdr *);
2031 extern void bfd_elf64_swap_phdr_out
2032   (bfd *, const Elf_Internal_Phdr *, Elf64_External_Phdr *);
2033 extern void bfd_elf64_swap_dyn_in
2034   (bfd *, const void *, Elf_Internal_Dyn *);
2035 extern void bfd_elf64_swap_dyn_out
2036   (bfd *, const Elf_Internal_Dyn *, void *);
2037 extern long bfd_elf64_slurp_symbol_table
2038   (bfd *, asymbol **, bfd_boolean);
2039 extern bfd_boolean bfd_elf64_write_shdrs_and_ehdr
2040   (bfd *);
2041 extern int bfd_elf64_write_out_phdrs
2042   (bfd *, const Elf_Internal_Phdr *, unsigned int);
2043 extern bfd_boolean bfd_elf64_checksum_contents
2044   (bfd * , void (*) (const void *, size_t, void *), void *);
2045 extern void bfd_elf64_write_relocs
2046   (bfd *, asection *, void *);
2047 extern bfd_boolean bfd_elf64_slurp_reloc_table
2048   (bfd *, asection *, asymbol **, bfd_boolean);
2049
2050 extern bfd_boolean _bfd_elf_default_relocs_compatible
2051   (const bfd_target *, const bfd_target *);
2052
2053 extern bfd_boolean _bfd_elf_relocs_compatible
2054   (const bfd_target *, const bfd_target *);
2055
2056 extern struct elf_link_hash_entry *_bfd_elf_archive_symbol_lookup
2057   (bfd *, struct bfd_link_info *, const char *);
2058 extern bfd_boolean bfd_elf_link_add_symbols
2059   (bfd *, struct bfd_link_info *);
2060 extern bfd_boolean _bfd_elf_add_dynamic_entry
2061   (struct bfd_link_info *, bfd_vma, bfd_vma);
2062
2063 extern bfd_boolean bfd_elf_link_record_dynamic_symbol
2064   (struct bfd_link_info *, struct elf_link_hash_entry *);
2065
2066 extern int bfd_elf_link_record_local_dynamic_symbol
2067   (struct bfd_link_info *, bfd *, long);
2068
2069 extern void bfd_elf_link_mark_dynamic_symbol
2070   (struct bfd_link_info *, struct elf_link_hash_entry *,
2071    Elf_Internal_Sym *);
2072
2073 extern bfd_boolean _bfd_elf_close_and_cleanup
2074   (bfd *);
2075
2076 extern bfd_boolean _bfd_elf_common_definition
2077   (Elf_Internal_Sym *);
2078
2079 extern unsigned int _bfd_elf_common_section_index
2080   (asection *);
2081
2082 extern asection *_bfd_elf_common_section
2083   (asection *);
2084
2085 extern void _bfd_dwarf2_cleanup_debug_info
2086   (bfd *);
2087
2088 extern bfd_vma _bfd_elf_default_got_elt_size
2089 (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, bfd *,
2090  unsigned long);
2091
2092 extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn
2093   (bfd *, arelent *, struct bfd_symbol *, void *,
2094    asection *, bfd *, char **);
2095
2096 extern bfd_boolean bfd_elf_final_link
2097   (bfd *, struct bfd_link_info *);
2098
2099 extern void _bfd_elf_gc_keep
2100   (struct bfd_link_info *info);
2101
2102 extern bfd_boolean bfd_elf_gc_mark_dynamic_ref_symbol
2103   (struct elf_link_hash_entry *h, void *inf);
2104
2105 extern bfd_boolean bfd_elf_gc_sections
2106   (bfd *, struct bfd_link_info *);
2107
2108 extern bfd_boolean bfd_elf_gc_record_vtinherit
2109   (bfd *, asection *, struct elf_link_hash_entry *, bfd_vma);
2110
2111 extern bfd_boolean bfd_elf_gc_record_vtentry
2112   (bfd *, asection *, struct elf_link_hash_entry *, bfd_vma);
2113
2114 extern asection *_bfd_elf_gc_mark_hook
2115   (asection *, struct bfd_link_info *, Elf_Internal_Rela *,
2116    struct elf_link_hash_entry *, Elf_Internal_Sym *);
2117
2118 extern asection *_bfd_elf_gc_mark_rsec
2119   (struct bfd_link_info *, asection *, elf_gc_mark_hook_fn,
2120    struct elf_reloc_cookie *);
2121
2122 extern bfd_boolean _bfd_elf_gc_mark_reloc
2123   (struct bfd_link_info *, asection *, elf_gc_mark_hook_fn,
2124    struct elf_reloc_cookie *);
2125
2126 extern bfd_boolean _bfd_elf_gc_mark_fdes
2127   (struct bfd_link_info *, asection *, asection *, elf_gc_mark_hook_fn,
2128    struct elf_reloc_cookie *);
2129
2130 extern bfd_boolean _bfd_elf_gc_mark
2131   (struct bfd_link_info *, asection *, elf_gc_mark_hook_fn);
2132
2133 extern bfd_boolean bfd_elf_gc_common_finalize_got_offsets
2134   (bfd *, struct bfd_link_info *);
2135
2136 extern bfd_boolean bfd_elf_gc_common_final_link
2137   (bfd *, struct bfd_link_info *);
2138
2139 extern bfd_boolean bfd_elf_reloc_symbol_deleted_p
2140   (bfd_vma, void *);
2141
2142 extern struct elf_segment_map * _bfd_elf_make_dynamic_segment
2143   (bfd *, asection *);
2144
2145 extern bfd_boolean _bfd_elf_map_sections_to_segments
2146   (bfd *, struct bfd_link_info *);
2147
2148 extern bfd_boolean _bfd_elf_is_function_type (unsigned int);
2149
2150 extern Elf_Internal_Phdr * _bfd_elf_find_segment_containing_section
2151   (bfd * abfd, asection * section);
2152
2153 /* Exported interface for writing elf corefile notes. */
2154 extern char *elfcore_write_note
2155   (bfd *, char *, int *, const char *, int, const void *, int);
2156 extern char *elfcore_write_prpsinfo
2157   (bfd *, char *, int *, const char *, const char *);
2158 extern char *elfcore_write_prstatus
2159   (bfd *, char *, int *, long, int, const void *);
2160 extern char * elfcore_write_pstatus
2161   (bfd *, char *, int *, long, int, const void *);
2162 extern char *elfcore_write_prfpreg
2163   (bfd *, char *, int *, const void *, int);
2164 extern char *elfcore_write_prxfpreg
2165   (bfd *, char *, int *, const void *, int);
2166 extern char *elfcore_write_ppc_vmx
2167   (bfd *, char *, int *, const void *, int);
2168 extern char *elfcore_write_ppc_vsx
2169   (bfd *, char *, int *, const void *, int);
2170 extern char *elfcore_write_lwpstatus
2171   (bfd *, char *, int *, long, int, const void *);
2172 extern char *elfcore_write_register_note
2173   (bfd *, char *, int *, const char *, const void *, int);
2174
2175 extern bfd *_bfd_elf32_bfd_from_remote_memory
2176   (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep,
2177    int (*target_read_memory) (bfd_vma, bfd_byte *, int));
2178 extern bfd *_bfd_elf64_bfd_from_remote_memory
2179   (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep,
2180    int (*target_read_memory) (bfd_vma, bfd_byte *, int));
2181
2182 extern bfd_vma bfd_elf_obj_attr_size (bfd *);
2183 extern void bfd_elf_set_obj_attr_contents (bfd *, bfd_byte *, bfd_vma);
2184 extern int bfd_elf_get_obj_attr_int (bfd *, int, int);
2185 extern void bfd_elf_add_obj_attr_int (bfd *, int, int, unsigned int);
2186 #define bfd_elf_add_proc_attr_int(BFD, TAG, VALUE) \
2187   bfd_elf_add_obj_attr_int ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2188 extern void bfd_elf_add_obj_attr_string (bfd *, int, int, const char *);
2189 #define bfd_elf_add_proc_attr_string(BFD, TAG, VALUE) \
2190   bfd_elf_add_obj_attr_string ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE))
2191 extern void bfd_elf_add_obj_attr_compat (bfd *, int, unsigned int,
2192                                          const char *);
2193 #define bfd_elf_add_proc_attr_compat(BFD, INTVAL, STRVAL) \
2194   bfd_elf_add_obj_attr_compat ((BFD), OBJ_ATTR_PROC, (INTVAL), (STRVAL))
2195
2196 extern char *_bfd_elf_attr_strdup (bfd *, const char *);
2197 extern void _bfd_elf_copy_obj_attributes (bfd *, bfd *);
2198 extern int _bfd_elf_obj_attrs_arg_type (bfd *, int, int);
2199 extern void _bfd_elf_parse_attributes (bfd *, Elf_Internal_Shdr *);
2200 extern bfd_boolean _bfd_elf_merge_object_attributes (bfd *, bfd *);
2201
2202 /* Large common section.  */
2203 extern asection _bfd_elf_large_com_section;
2204
2205 /* SH ELF specific routine.  */
2206
2207 extern bfd_boolean _sh_elf_set_mach_from_flags
2208   (bfd *);
2209
2210 /* This is the condition under which finish_dynamic_symbol will be called.
2211    If our finish_dynamic_symbol isn't called, we'll need to do something
2212    about initializing any .plt and .got entries in relocate_section.  */
2213 #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
2214   ((DYN)                                                                \
2215    && ((SHARED) || !(H)->forced_local)                                  \
2216    && ((H)->dynindx != -1 || (H)->forced_local))
2217
2218 /* This macro is to avoid lots of duplicated code in the body
2219    of xxx_relocate_section() in the various elfxx-xxxx.c files.  */
2220 #define RELOC_FOR_GLOBAL_SYMBOL(info, input_bfd, input_section, rel,    \
2221                                 r_symndx, symtab_hdr, sym_hashes,       \
2222                                 h, sec, relocation,                     \
2223                                 unresolved_reloc, warned)               \
2224   do                                                                    \
2225     {                                                                   \
2226       /* It seems this can happen with erroneous or unsupported         \
2227          input (mixing a.out and elf in an archive, for example.)  */   \
2228       if (sym_hashes == NULL)                                           \
2229         return FALSE;                                                   \
2230                                                                         \
2231       h = sym_hashes[r_symndx - symtab_hdr->sh_info];                   \
2232                                                                         \
2233       while (h->root.type == bfd_link_hash_indirect                     \
2234              || h->root.type == bfd_link_hash_warning)                  \
2235         h = (struct elf_link_hash_entry *) h->root.u.i.link;            \
2236                                                                         \
2237       warned = FALSE;                                                   \
2238       unresolved_reloc = FALSE;                                         \
2239       relocation = 0;                                                   \
2240       if (h->root.type == bfd_link_hash_defined                         \
2241           || h->root.type == bfd_link_hash_defweak)                     \
2242         {                                                               \
2243           sec = h->root.u.def.section;                                  \
2244           if (sec == NULL                                               \
2245               || sec->output_section == NULL)                           \
2246             /* Set a flag that will be cleared later if we find a       \
2247                relocation value for this symbol.  output_section        \
2248                is typically NULL for symbols satisfied by a shared      \
2249                library.  */                                             \
2250             unresolved_reloc = TRUE;                                    \
2251           else                                                          \
2252             relocation = (h->root.u.def.value                           \
2253                           + sec->output_section->vma                    \
2254                           + sec->output_offset);                        \
2255         }                                                               \
2256       else if (h->root.type == bfd_link_hash_undefweak)                 \
2257         ;                                                               \
2258       else if (info->unresolved_syms_in_objects == RM_IGNORE            \
2259                && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)          \
2260         ;                                                               \
2261       else if (!info->relocatable)                                      \
2262         {                                                               \
2263           bfd_boolean err;                                              \
2264           err = (info->unresolved_syms_in_objects == RM_GENERATE_ERROR  \
2265                  || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT);       \
2266           if (!info->callbacks->undefined_symbol (info,                 \
2267                                                   h->root.root.string,  \
2268                                                   input_bfd,            \
2269                                                   input_section,        \
2270                                                   rel->r_offset, err))  \
2271             return FALSE;                                               \
2272           warned = TRUE;                                                \
2273         }                                                               \
2274     }                                                                   \
2275   while (0)
2276
2277 /* Will a symbol be bound to the the definition within the shared
2278    library, if any.  */
2279 #define SYMBOLIC_BIND(INFO, H) \
2280     ((INFO)->symbolic || ((INFO)->dynamic && !(H)->dynamic))
2281
2282 #endif /* _LIBELF_H_ */