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