bfd/libcoff-in.h

   1 /* BFD COFF object file private structure.
   2    Copyright (C) 1990-2023 Free Software Foundation, Inc.
   3    Written by Cygnus Support.
   4
   5    This file is part of BFD, the Binary File Descriptor library.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  20    MA 02110-1301, USA.  */
  21
  22 #ifndef _LIBCOFF_H
  23 #define _LIBCOFF_H 1
  24
  25 #include "bfdlink.h"
  26 #include "coff-bfd.h"
  27 #include "hashtab.h"
  28
  29 #ifdef __cplusplus
  30 extern "C" {
  31 #endif
  32
  33 /* Object file tdata; access macros.  */
  34
  35 #define coff_data(bfd)                ((bfd)->tdata.coff_obj_data)
  36 #define obj_pe(bfd)                   (coff_data (bfd)->pe)
  37 #define obj_go32(bfd)                 (coff_data (bfd)->go32)
  38 #define obj_symbols(bfd)              (coff_data (bfd)->symbols)
  39 #define obj_sym_filepos(bfd)          (coff_data (bfd)->sym_filepos)
  40 #define obj_relocbase(bfd)            (coff_data (bfd)->relocbase)
  41 #define obj_raw_syments(bfd)          (coff_data (bfd)->raw_syments)
  42 #define obj_raw_syment_count(bfd)     (coff_data (bfd)->raw_syment_count)
  43 #define obj_convert(bfd)              (coff_data (bfd)->conversion_table)
  44 #define obj_conv_table_size(bfd)      (coff_data (bfd)->conv_table_size)
  45 #define obj_coff_external_syms(bfd)   (coff_data (bfd)->external_syms)
  46 #define obj_coff_keep_syms(bfd)       (coff_data (bfd)->keep_syms)
  47 #define obj_coff_strings(bfd)         (coff_data (bfd)->strings)
  48 #define obj_coff_strings_len(bfd)     (coff_data (bfd)->strings_len)
  49 #define obj_coff_keep_strings(bfd)    (coff_data (bfd)->keep_strings)
  50 #define obj_coff_sym_hashes(bfd)      (coff_data (bfd)->sym_hashes)
  51 #define obj_coff_strings_written(bfd) (coff_data (bfd)->strings_written)
  52 #define obj_coff_local_toc_table(bfd) (coff_data (bfd)->local_toc_sym_map)
  53
  54 /* `Tdata' information kept for COFF files.  */
  55
  56 typedef struct coff_tdata
  57 {
  58   struct coff_symbol_struct *symbols;   /* Symtab for input bfd.  */
  59   unsigned int *conversion_table;
  60   int conv_table_size;
  61   file_ptr sym_filepos;
  62
  63   struct coff_ptr_struct *raw_syments;
  64   unsigned long raw_syment_count;
  65
  66   /* These are only valid once writing has begun.  */
  67   unsigned long int relocbase;
  68
  69   /* These members communicate important constants about the symbol table
  70      to GDB's symbol-reading code.  These `constants' unfortunately vary
  71      from coff implementation to implementation...  */
  72   unsigned local_n_btmask;
  73   unsigned local_n_btshft;
  74   unsigned local_n_tmask;
  75   unsigned local_n_tshift;
  76   unsigned local_symesz;
  77   unsigned local_auxesz;
  78   unsigned local_linesz;
  79
  80   /* The unswapped external symbols.  May be NULL.  Read by
  81      _bfd_coff_get_external_symbols.  */
  82   void * external_syms;
  83
  84   /* The string table.  May be NULL.  Read by
  85      _bfd_coff_read_string_table.  */
  86   char *strings;
  87   /* The length of the strings table.  For error checking.  */
  88   bfd_size_type strings_len;
  89
  90   /* Set if long section names are supported.  A writable copy of the COFF
  91      backend flag _bfd_coff_long_section_names.  */
  92   bool long_section_names;
  93
  94   /* If this is TRUE, the external_syms may not be freed.  */
  95   bool keep_syms;
  96   /* If this is TRUE, the strings may not be freed.  */
  97   bool keep_strings;
  98   /* If this is TRUE, the strings have been written out already.  */
  99   bool strings_written;
 100
 101   /* Is this a GO32 coff file?  */
 102   bool go32;
 103
 104   /* Is this a PE format coff file?  */
 105   bool pe;
 106
 107   /* Copy of some of the f_flags bits in the COFF filehdr structure,
 108      used by ARM code.  */
 109   flagword flags;
 110
 111   /* Used by the COFF backend linker.  */
 112   struct coff_link_hash_entry **sym_hashes;
 113
 114   /* Used by the pe linker for PowerPC.  */
 115   int *local_toc_sym_map;
 116
 117   struct bfd_link_info *link_info;
 118
 119   /* Used by coff_find_nearest_line.  */
 120   void * line_info;
 121
 122   /* A place to stash dwarf2 info for this bfd.  */
 123   void * dwarf2_find_line_info;
 124
 125   /* The timestamp from the COFF file header.  */
 126   long timestamp;
 127
 128   /* A stub (extra data prepended before the COFF image) and its size.
 129      Used by coff-go32-exe, it contains executable data that loads the
 130      COFF object into memory.  */
 131   char * stub;
 132   bfd_size_type stub_size;
 133
 134   /* Hash table containing sections by target index.  */
 135   htab_t section_by_target_index;
 136
 137   /* Hash table containing sections by index.  */
 138   htab_t section_by_index;
 139
 140 } coff_data_type;
 141
 142 /* Tdata for pe image files.  */
 143 typedef struct pe_tdata
 144 {
 145   coff_data_type coff;
 146   struct internal_extra_pe_aouthdr pe_opthdr;
 147   int dll;
 148   int has_reloc_section;
 149   int dont_strip_reloc;
 150   char dos_message[64];
 151   /* The timestamp to insert into the output file.
 152      If the timestamp is -1 then the current time is used.  */
 153   int timestamp;
 154   bool (*in_reloc_p) (bfd *, reloc_howto_type *);
 155   flagword real_flags;
 156
 157   /* Build-id info.  */
 158   struct
 159   {
 160     bool (*after_write_object_contents) (bfd *);
 161     const char *style;
 162     asection *sec;
 163   } build_id;
 164
 165   htab_t comdat_hash;
 166 } pe_data_type;
 167
 168 #define pe_data(bfd)            ((bfd)->tdata.pe_obj_data)
 169
 170 struct comdat_hash_entry
 171 {
 172   int target_index;
 173   struct internal_syment isym;
 174   char *symname;
 175   flagword sec_flags;
 176   char *comdat_name;
 177   long comdat_symbol;
 178 };
 179
 180 /* Tdata for XCOFF files.  */
 181
 182 struct xcoff_tdata
 183 {
 184   /* Basic COFF information.  */
 185   coff_data_type coff;
 186
 187   /* TRUE if this is an XCOFF64 file. */
 188   bool xcoff64;
 189
 190   /* TRUE if a large a.out header should be generated.  */
 191   bool full_aouthdr;
 192
 193   /* TOC value.  */
 194   bfd_vma toc;
 195
 196   /* Index of section holding TOC.  */
 197   int sntoc;
 198
 199   /* Index of section holding entry point.  */
 200   int snentry;
 201
 202   /* .text alignment from optional header.  */
 203   int text_align_power;
 204
 205   /* .data alignment from optional header.  */
 206   int data_align_power;
 207
 208   /* modtype from optional header.  */
 209   short modtype;
 210
 211   /* cputype from optional header.  */
 212   short cputype;
 213
 214   /* maxdata from optional header.  */
 215   bfd_vma maxdata;
 216
 217   /* maxstack from optional header.  */
 218   bfd_vma maxstack;
 219
 220   /* Used by the XCOFF backend linker.  */
 221   asection **csects;
 222   long *debug_indices;
 223   unsigned int *lineno_counts;
 224   unsigned int import_file_id;
 225 };
 226
 227 #define xcoff_data(abfd) ((abfd)->tdata.xcoff_obj_data)
 228
 229 /* We take the address of the first element of an asymbol to ensure that the
 230    macro is only ever applied to an asymbol.  */
 231 #define coffsymbol(asymbol) ((coff_symbol_type *)(&((asymbol)->the_bfd)))
 232
 233 /* Tdata for sections in XCOFF files.  This is used by the linker.  */
 234
 235 struct xcoff_section_tdata
 236 {
 237   /* Used for XCOFF csects created by the linker; points to the real
 238      XCOFF section which contains this csect.  */
 239   asection *enclosing;
 240   /* The lineno_count field for the enclosing section, because we are
 241      going to clobber it there.  */
 242   unsigned int lineno_count;
 243   /* The first and last symbol indices for symbols used by this csect.  */
 244   unsigned long first_symndx;
 245   unsigned long last_symndx;
 246 };
 247
 248 /* An accessor macro the xcoff_section_tdata structure.  */
 249 #define xcoff_section_data(abfd, sec) \
 250   ((struct xcoff_section_tdata *) coff_section_data ((abfd), (sec))->tdata)
 251
 252 /* Tdata for sections in PE files.  */
 253
 254 struct pei_section_tdata
 255 {
 256   /* The virtual size of the section.  */
 257   bfd_size_type virt_size;
 258   /* The PE section flags.  */
 259   long pe_flags;
 260 };
 261
 262 /* An accessor macro for the pei_section_tdata structure.  */
 263 #define pei_section_data(abfd, sec) \
 264   ((struct pei_section_tdata *) coff_section_data ((abfd), (sec))->tdata)
 265
 266 /* COFF linker hash table entries.  */
 267
 268 struct coff_link_hash_entry
 269 {
 270   struct bfd_link_hash_entry root;
 271
 272   /* Symbol index in output file.  This is initialized to -1.  It is
 273      set to -2 if the symbol is used by a reloc.  It is set to -3 if
 274      this symbol is defined in a discarded section.  */
 275   long indx;
 276
 277   /* Symbol type.  */
 278   unsigned short type;
 279
 280   /* Symbol class.  */
 281   unsigned char symbol_class;
 282
 283   /* Number of auxiliary entries.  */
 284   char numaux;
 285
 286   /* BFD to take auxiliary entries from.  */
 287   bfd *auxbfd;
 288
 289   /* Pointer to array of auxiliary entries, if any.  */
 290   union internal_auxent *aux;
 291
 292   /* Flag word; legal values follow.  */
 293   unsigned short coff_link_hash_flags;
 294   /* Symbol is a PE section symbol.  */
 295 #define COFF_LINK_HASH_PE_SECTION_SYMBOL (01)
 296 };
 297
 298 /* COFF linker hash table.  */
 299
 300 struct coff_link_hash_table
 301 {
 302   struct bfd_link_hash_table root;
 303   /* A pointer to information used to link stabs in sections.  */
 304   struct stab_info stab_info;
 305   /* Hash table that maps undecorated names to their respective
 306    * decorated coff_link_hash_entry as found in fixup_stdcalls  */
 307   struct bfd_hash_table decoration_hash;
 308 };
 309
 310 struct coff_reloc_cookie
 311 {
 312   struct internal_reloc *         rels;
 313   struct internal_reloc *         rel;
 314   struct internal_reloc *         relend;
 315   struct coff_symbol_struct *     symbols;      /* Symtab for input bfd.  */
 316   bfd *                           abfd;
 317   struct coff_link_hash_entry **  sym_hashes;
 318 };
 319
 320 /* Look up an entry in a COFF linker hash table.  */
 321
 322 #define coff_link_hash_lookup(table, string, create, copy, follow)      \
 323   ((struct coff_link_hash_entry *)                                      \
 324    bfd_link_hash_lookup (&(table)->root, (string), (create),            \
 325                          (copy), (follow)))
 326
 327 /* Traverse a COFF linker hash table.  */
 328
 329 #define coff_link_hash_traverse(table, func, info)                      \
 330   (bfd_link_hash_traverse                                               \
 331    (&(table)->root,                                                     \
 332     (bool (*) (struct bfd_link_hash_entry *, void *)) (func),           \
 333     (info)))
 334
 335 /* Get the COFF linker hash table from a link_info structure.  */
 336
 337 #define coff_hash_table(p) ((struct coff_link_hash_table *) ((p)->hash))
 338
 339 struct decoration_hash_entry
 340 {
 341   struct bfd_hash_entry root;
 342   struct bfd_link_hash_entry *decorated_link;
 343 };
 344
 345 /* Functions in coffgen.c.  */
 346 extern void coff_object_cleanup
 347   (bfd *);
 348 extern bfd_cleanup coff_real_object_p
 349   (bfd *, unsigned, struct internal_filehdr *, struct internal_aouthdr *);
 350 extern bfd_cleanup coff_object_p
 351   (bfd *);
 352 extern struct bfd_section *coff_section_from_bfd_index
 353   (bfd *, int);
 354 extern long coff_get_symtab_upper_bound
 355   (bfd *);
 356 extern long coff_canonicalize_symtab
 357   (bfd *, asymbol **);
 358 extern int coff_count_linenumbers
 359   (bfd *);
 360 extern bool coff_renumber_symbols
 361   (bfd *, int *);
 362 extern void coff_mangle_symbols
 363   (bfd *);
 364 extern bool coff_write_symbols
 365   (bfd *);
 366 extern bool coff_write_alien_symbol
 367   (bfd *, asymbol *, struct internal_syment *, bfd_vma *,
 368    struct bfd_strtab_hash *, bool, asection **, bfd_size_type *);
 369 extern bool coff_write_linenumbers
 370   (bfd *);
 371 extern alent *coff_get_lineno
 372   (bfd *, asymbol *);
 373 extern asymbol *coff_section_symbol
 374   (bfd *, char *);
 375 extern bool _bfd_coff_get_external_symbols
 376   (bfd *);
 377 extern const char *_bfd_coff_read_string_table
 378   (bfd *);
 379 extern bool _bfd_coff_free_symbols
 380   (bfd *);
 381 extern struct coff_ptr_struct *coff_get_normalized_symtab
 382   (bfd *);
 383 extern long coff_get_reloc_upper_bound
 384   (bfd *, sec_ptr);
 385 extern asymbol *coff_make_empty_symbol
 386   (bfd *);
 387 extern void coff_print_symbol
 388   (bfd *, void * filep, asymbol *, bfd_print_symbol_type);
 389 extern void coff_get_symbol_info
 390   (bfd *, asymbol *, symbol_info *ret);
 391 #define coff_get_symbol_version_string \
 392   _bfd_nosymbols_get_symbol_version_string
 393 extern bool _bfd_coff_is_local_label_name
 394   (bfd *, const char *);
 395 extern asymbol *coff_bfd_make_debug_symbol
 396   (bfd *);
 397 extern bool coff_find_nearest_line
 398   (bfd *, asymbol **, asection *, bfd_vma,
 399    const char **, const char **, unsigned int *, unsigned int *);
 400 #define coff_find_nearest_line_with_alt \
 401   _bfd_nosymbols_find_nearest_line_with_alt
 402 #define coff_find_line _bfd_nosymbols_find_line
 403 struct dwarf_debug_section;
 404 extern bool coff_find_nearest_line_with_names
 405   (bfd *, asymbol **, asection *, bfd_vma, const char **, const char **,
 406    unsigned int *, const struct dwarf_debug_section *);
 407 extern bool coff_find_inliner_info
 408   (bfd *, const char **, const char **, unsigned int *);
 409 extern int coff_sizeof_headers
 410   (bfd *, struct bfd_link_info *);
 411 extern bool bfd_coff_reloc16_relax_section
 412   (bfd *, asection *, struct bfd_link_info *, bool *);
 413 extern bfd_byte *bfd_coff_reloc16_get_relocated_section_contents
 414   (bfd *, struct bfd_link_info *, struct bfd_link_order *,
 415    bfd_byte *, bool, asymbol **);
 416 extern bfd_vma bfd_coff_reloc16_get_value
 417   (arelent *, struct bfd_link_info *, asection *);
 418 extern void bfd_perform_slip
 419   (bfd *, unsigned int, asection *, bfd_vma);
 420 extern bool _bfd_coff_free_cached_info
 421   (bfd *);
 422
 423 /* Functions and types in cofflink.c.  */
 424
 425 #define STRING_SIZE_SIZE 4
 426
 427 /* We use a hash table to merge identical enum, struct, and union
 428    definitions in the linker.  */
 429
 430 /* Information we keep for a single element (an enum value, a
 431    structure or union field) in the debug merge hash table.  */
 432
 433 struct coff_debug_merge_element
 434 {
 435   /* Next element.  */
 436   struct coff_debug_merge_element *next;
 437
 438   /* Name.  */
 439   const char *name;
 440
 441   /* Type.  */
 442   unsigned int type;
 443
 444   /* Symbol index for complex type.  */
 445   long tagndx;
 446 };
 447
 448 /* A linked list of debug merge entries for a given name.  */
 449
 450 struct coff_debug_merge_type
 451 {
 452   /* Next type with the same name.  */
 453   struct coff_debug_merge_type *next;
 454
 455   /* Class of type.  */
 456   int type_class;
 457
 458   /* Symbol index where this type is defined.  */
 459   long indx;
 460
 461   /* List of elements.  */
 462   struct coff_debug_merge_element *elements;
 463 };
 464
 465 /* Information we store in the debug merge hash table.  */
 466
 467 struct coff_debug_merge_hash_entry
 468 {
 469   struct bfd_hash_entry root;
 470
 471   /* A list of types with this name.  */
 472   struct coff_debug_merge_type *types;
 473 };
 474
 475 /* The debug merge hash table.  */
 476
 477 struct coff_debug_merge_hash_table
 478 {
 479   struct bfd_hash_table root;
 480 };
 481
 482 /* Initialize a COFF debug merge hash table.  */
 483
 484 #define coff_debug_merge_hash_table_init(table) \
 485   (bfd_hash_table_init (&(table)->root, _bfd_coff_debug_merge_hash_newfunc, \
 486                         sizeof (struct coff_debug_merge_hash_entry)))
 487
 488 /* Free a COFF debug merge hash table.  */
 489
 490 #define coff_debug_merge_hash_table_free(table) \
 491   (bfd_hash_table_free (&(table)->root))
 492
 493 /* Look up an entry in a COFF debug merge hash table.  */
 494
 495 #define coff_debug_merge_hash_lookup(table, string, create, copy) \
 496   ((struct coff_debug_merge_hash_entry *) \
 497    bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
 498
 499 /* Information we keep for each section in the output file when doing
 500    a relocatable link.  */
 501
 502 struct coff_link_section_info
 503 {
 504   /* The relocs to be output.  */
 505   struct internal_reloc *relocs;
 506   /* For each reloc against a global symbol whose index was not known
 507      when the reloc was handled, the global hash table entry.  */
 508   struct coff_link_hash_entry **rel_hashes;
 509 };
 510
 511 /* Information that we pass around while doing the final link step.  */
 512
 513 struct coff_final_link_info
 514 {
 515   /* General link information.  */
 516   struct bfd_link_info *info;
 517   /* Output BFD.  */
 518   bfd *output_bfd;
 519   /* Used to indicate failure in traversal routine.  */
 520   bool failed;
 521   /* If doing "task linking" set only during the time when we want the
 522      global symbol writer to convert the storage class of defined global
 523      symbols from global to static. */
 524   bool global_to_static;
 525   /* Hash table for long symbol names.  */
 526   struct bfd_strtab_hash *strtab;
 527   /* When doing a relocatable link, an array of information kept for
 528      each output section, indexed by the target_index field.  */
 529   struct coff_link_section_info *section_info;
 530   /* Symbol index of last C_FILE symbol (-1 if none).  */
 531   long last_file_index;
 532   /* Contents of last C_FILE symbol.  */
 533   struct internal_syment last_file;
 534   /* Symbol index of first aux entry of last .bf symbol with an empty
 535      endndx field (-1 if none).  */
 536   long last_bf_index;
 537   /* Contents of last_bf_index aux entry.  */
 538   union internal_auxent last_bf;
 539   /* Hash table used to merge debug information.  */
 540   struct coff_debug_merge_hash_table debug_merge;
 541   /* Buffer large enough to hold swapped symbols of any input file.  */
 542   struct internal_syment *internal_syms;
 543   /* Buffer large enough to hold sections of symbols of any input file.  */
 544   asection **sec_ptrs;
 545   /* Buffer large enough to hold output indices of symbols of any
 546      input file.  */
 547   long *sym_indices;
 548   /* Buffer large enough to hold output symbols for any input file.  */
 549   bfd_byte *outsyms;
 550   /* Buffer large enough to hold external line numbers for any input
 551      section.  */
 552   bfd_byte *linenos;
 553   /* Buffer large enough to hold any input section.  */
 554   bfd_byte *contents;
 555   /* Buffer large enough to hold external relocs of any input section.  */
 556   bfd_byte *external_relocs;
 557   /* Buffer large enough to hold swapped relocs of any input section.  */
 558   struct internal_reloc *internal_relocs;
 559 };
 560
 561 /* Most COFF variants have no way to record the alignment of a
 562    section.  This struct is used to set a specific alignment based on
 563    the name of the section.  */
 564
 565 struct coff_section_alignment_entry
 566 {
 567   /* The section name.  */
 568   const char *name;
 569
 570   /* This is either (unsigned int) -1, indicating that the section
 571      name must match exactly, or it is the number of letters which
 572      must match at the start of the name.  */
 573   unsigned int comparison_length;
 574
 575   /* These macros may be used to fill in the first two fields in a
 576      structure initialization.  */
 577 #define COFF_SECTION_NAME_EXACT_MATCH(name) (name), ((unsigned int) -1)
 578 #define COFF_SECTION_NAME_PARTIAL_MATCH(name) (name), (sizeof (name) - 1)
 579
 580   /* Only use this entry if the default section alignment for this
 581      target is at least that much (as a power of two).  If this field
 582      is COFF_ALIGNMENT_FIELD_EMPTY, it should be ignored.  */
 583   unsigned int default_alignment_min;
 584
 585   /* Only use this entry if the default section alignment for this
 586      target is no greater than this (as a power of two).  If this
 587      field is COFF_ALIGNMENT_FIELD_EMPTY, it should be ignored.  */
 588   unsigned int default_alignment_max;
 589
 590 #define COFF_ALIGNMENT_FIELD_EMPTY ((unsigned int) -1)
 591
 592   /* The desired alignment for this section (as a power of two).  */
 593   unsigned int alignment_power;
 594 };
 595
 596 extern struct bfd_hash_entry *_decoration_hash_newfunc
 597   (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
 598 extern struct bfd_hash_entry *_bfd_coff_link_hash_newfunc
 599   (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
 600 extern bool _bfd_coff_link_hash_table_init
 601   (struct coff_link_hash_table *, bfd *,
 602    struct bfd_hash_entry *(*) (struct bfd_hash_entry *,
 603                                struct bfd_hash_table *,
 604                                const char *),
 605    unsigned int);
 606 extern struct bfd_link_hash_table *_bfd_coff_link_hash_table_create
 607   (bfd *);
 608 extern const char *_bfd_coff_internal_syment_name
 609   (bfd *, const struct internal_syment *, char *);
 610 extern bool _bfd_coff_section_already_linked
 611   (bfd *, asection *, struct bfd_link_info *);
 612 extern bool _bfd_coff_link_add_symbols
 613   (bfd *, struct bfd_link_info *);
 614 extern bool _bfd_coff_final_link
 615   (bfd *, struct bfd_link_info *);
 616 extern struct internal_reloc *_bfd_coff_read_internal_relocs
 617   (bfd *, asection *, bool, bfd_byte *, bool,
 618    struct internal_reloc *);
 619 extern bool _bfd_coff_generic_relocate_section
 620   (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
 621    struct internal_reloc *, struct internal_syment *, asection **);
 622 extern struct bfd_hash_entry *_bfd_coff_debug_merge_hash_newfunc
 623   (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
 624 extern bool _bfd_coff_write_global_sym
 625   (struct bfd_hash_entry *, void *);
 626 extern bool _bfd_coff_write_task_globals
 627   (struct coff_link_hash_entry *, void *);
 628 extern bool _bfd_coff_link_input_bfd
 629   (struct coff_final_link_info *, bfd *);
 630 extern bool _bfd_coff_reloc_link_order
 631   (bfd *, struct coff_final_link_info *, asection *,
 632    struct bfd_link_order *);
 633 extern bool bfd_coff_gc_sections
 634   (bfd *, struct bfd_link_info *);
 635 extern const char *bfd_coff_group_name
 636   (bfd *, const asection *);
 637
 638 #define coff_get_section_contents_in_window \
 639   _bfd_generic_get_section_contents_in_window
 640
 641 /* Functions in xcofflink.c.  */
 642
 643 extern long _bfd_xcoff_get_dynamic_symtab_upper_bound
 644   (bfd *);
 645 extern long _bfd_xcoff_canonicalize_dynamic_symtab
 646   (bfd *, asymbol **);
 647 extern long _bfd_xcoff_get_dynamic_reloc_upper_bound
 648   (bfd *);
 649 extern long _bfd_xcoff_canonicalize_dynamic_reloc
 650   (bfd *, arelent **, asymbol **);
 651 extern struct bfd_link_hash_table *_bfd_xcoff_bfd_link_hash_table_create
 652   (bfd *);
 653 extern bool _bfd_xcoff_bfd_link_add_symbols
 654   (bfd *, struct bfd_link_info *);
 655 extern bool _bfd_xcoff_bfd_final_link
 656   (bfd *, struct bfd_link_info *);
 657 extern bool _bfd_xcoff_define_common_symbol
 658   (bfd *, struct bfd_link_info *, struct bfd_link_hash_entry *);
 659 extern bool _bfd_ppc_xcoff_relocate_section
 660   (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
 661    struct internal_reloc *, struct internal_syment *, asection **);