bfd/libcoff-in.h

   1 /* BFD COFF object file private structure.
   2    Copyright (C) 1990-2020 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_symbols(bfd)              (coff_data (bfd)->symbols)
  37 #define obj_sym_filepos(bfd)          (coff_data (bfd)->sym_filepos)
  38 #define obj_relocbase(bfd)            (coff_data (bfd)->relocbase)
  39 #define obj_raw_syments(bfd)          (coff_data (bfd)->raw_syments)
  40 #define obj_raw_syment_count(bfd)     (coff_data (bfd)->raw_syment_count)
  41 #define obj_convert(bfd)              (coff_data (bfd)->conversion_table)
  42 #define obj_conv_table_size(bfd)      (coff_data (bfd)->conv_table_size)
  43 #define obj_coff_external_syms(bfd)   (coff_data (bfd)->external_syms)
  44 #define obj_coff_keep_syms(bfd)       (coff_data (bfd)->keep_syms)
  45 #define obj_coff_strings(bfd)         (coff_data (bfd)->strings)
  46 #define obj_coff_strings_len(bfd)     (coff_data (bfd)->strings_len)
  47 #define obj_coff_keep_strings(bfd)    (coff_data (bfd)->keep_strings)
  48 #define obj_coff_sym_hashes(bfd)      (coff_data (bfd)->sym_hashes)
  49 #define obj_coff_strings_written(bfd) (coff_data (bfd)->strings_written)
  50 #define obj_coff_local_toc_table(bfd) (coff_data (bfd)->local_toc_sym_map)
  51
  52 /* `Tdata' information kept for COFF files.  */
  53
  54 typedef struct coff_tdata
  55 {
  56   struct coff_symbol_struct *symbols;   /* Symtab for input bfd.  */
  57   unsigned int *conversion_table;
  58   int conv_table_size;
  59   file_ptr sym_filepos;
  60
  61   struct coff_ptr_struct *raw_syments;
  62   unsigned long raw_syment_count;
  63
  64   /* These are only valid once writing has begun.  */
  65   unsigned long int relocbase;
  66
  67   /* These members communicate important constants about the symbol table
  68      to GDB's symbol-reading code.  These `constants' unfortunately vary
  69      from coff implementation to implementation...  */
  70   unsigned local_n_btmask;
  71   unsigned local_n_btshft;
  72   unsigned local_n_tmask;
  73   unsigned local_n_tshift;
  74   unsigned local_symesz;
  75   unsigned local_auxesz;
  76   unsigned local_linesz;
  77
  78   /* The unswapped external symbols.  May be NULL.  Read by
  79      _bfd_coff_get_external_symbols.  */
  80   void * external_syms;
  81   /* If this is TRUE, the external_syms may not be freed.  */
  82   bfd_boolean keep_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   /* If this is TRUE, the strings may not be freed.  */
  90   bfd_boolean keep_strings;
  91   /* If this is TRUE, the strings have been written out already.  */
  92   bfd_boolean strings_written;
  93
  94   /* Is this a PE format coff file?  */
  95   int pe;
  96   /* Used by the COFF backend linker.  */
  97   struct coff_link_hash_entry **sym_hashes;
  98
  99   /* Used by the pe linker for PowerPC.  */
 100   int *local_toc_sym_map;
 101
 102   struct bfd_link_info *link_info;
 103
 104   /* Used by coff_find_nearest_line.  */
 105   void * line_info;
 106
 107   /* A place to stash dwarf2 info for this bfd.  */
 108   void * dwarf2_find_line_info;
 109
 110   /* The timestamp from the COFF file header.  */
 111   long timestamp;
 112
 113   /* Copy of some of the f_flags bits in the COFF filehdr structure,
 114      used by ARM code.  */
 115   flagword flags;
 116
 117   /* A stub (extra data prepended before the COFF image) and its size.
 118      Used by coff-go32-exe, it contains executable data that loads the
 119      COFF object into memory.  */
 120   char * stub;
 121   bfd_size_type stub_size;
 122 } coff_data_type;
 123
 124 /* Tdata for pe image files.  */
 125 typedef struct pe_tdata
 126 {
 127   coff_data_type coff;
 128   struct internal_extra_pe_aouthdr pe_opthdr;
 129   int dll;
 130   int has_reloc_section;
 131   int dont_strip_reloc;
 132   int dos_message[16];
 133   /* The timestamp to insert into the output file.
 134      If the timestamp is -1 then the current time is used.  */
 135   int timestamp;
 136   bfd_boolean (*in_reloc_p) (bfd *, reloc_howto_type *);
 137   flagword real_flags;
 138
 139   /* Build-id info.  */
 140   struct
 141   {
 142     bfd_boolean (*after_write_object_contents) (bfd *);
 143     const char *style;
 144     asection *sec;
 145   } build_id;
 146 } pe_data_type;
 147
 148 #define pe_data(bfd)            ((bfd)->tdata.pe_obj_data)
 149
 150 /* Tdata for XCOFF files.  */
 151
 152 struct xcoff_tdata
 153 {
 154   /* Basic COFF information.  */
 155   coff_data_type coff;
 156
 157   /* TRUE if this is an XCOFF64 file. */
 158   bfd_boolean xcoff64;
 159
 160   /* TRUE if a large a.out header should be generated.  */
 161   bfd_boolean full_aouthdr;
 162
 163   /* TOC value.  */
 164   bfd_vma toc;
 165
 166   /* Index of section holding TOC.  */
 167   int sntoc;
 168
 169   /* Index of section holding entry point.  */
 170   int snentry;
 171
 172   /* .text alignment from optional header.  */
 173   int text_align_power;
 174
 175   /* .data alignment from optional header.  */
 176   int data_align_power;
 177
 178   /* modtype from optional header.  */
 179   short modtype;
 180
 181   /* cputype from optional header.  */
 182   short cputype;
 183
 184   /* maxdata from optional header.  */
 185   bfd_vma maxdata;
 186
 187   /* maxstack from optional header.  */
 188   bfd_vma maxstack;
 189
 190   /* Used by the XCOFF backend linker.  */
 191   asection **csects;
 192   long *debug_indices;
 193   unsigned int *lineno_counts;
 194   unsigned int import_file_id;
 195 };
 196
 197 #define xcoff_data(abfd) ((abfd)->tdata.xcoff_obj_data)
 198
 199 /* We take the address of the first element of an asymbol to ensure that the
 200    macro is only ever applied to an asymbol.  */
 201 #define coffsymbol(asymbol) ((coff_symbol_type *)(&((asymbol)->the_bfd)))
 202
 203 /* Tdata for sections in XCOFF files.  This is used by the linker.  */
 204
 205 struct xcoff_section_tdata
 206 {
 207   /* Used for XCOFF csects created by the linker; points to the real
 208      XCOFF section which contains this csect.  */
 209   asection *enclosing;
 210   /* The lineno_count field for the enclosing section, because we are
 211      going to clobber it there.  */
 212   unsigned int lineno_count;
 213   /* The first and last symbol indices for symbols used by this csect.  */
 214   unsigned long first_symndx;
 215   unsigned long last_symndx;
 216 };
 217
 218 /* An accessor macro the xcoff_section_tdata structure.  */
 219 #define xcoff_section_data(abfd, sec) \
 220   ((struct xcoff_section_tdata *) coff_section_data ((abfd), (sec))->tdata)
 221
 222 /* Tdata for sections in PE files.  */
 223
 224 struct pei_section_tdata
 225 {
 226   /* The virtual size of the section.  */
 227   bfd_size_type virt_size;
 228   /* The PE section flags.  */
 229   long pe_flags;
 230 };
 231
 232 /* An accessor macro for the pei_section_tdata structure.  */
 233 #define pei_section_data(abfd, sec) \
 234   ((struct pei_section_tdata *) coff_section_data ((abfd), (sec))->tdata)
 235
 236 /* COFF linker hash table entries.  */
 237
 238 struct coff_link_hash_entry
 239 {
 240   struct bfd_link_hash_entry root;
 241
 242   /* Symbol index in output file.  Set to -1 initially.  Set to -2 if
 243      there is a reloc against this symbol.  */
 244   long indx;
 245
 246   /* Symbol type.  */
 247   unsigned short type;
 248
 249   /* Symbol class.  */
 250   unsigned char symbol_class;
 251
 252   /* Number of auxiliary entries.  */
 253   char numaux;
 254
 255   /* BFD to take auxiliary entries from.  */
 256   bfd *auxbfd;
 257
 258   /* Pointer to array of auxiliary entries, if any.  */
 259   union internal_auxent *aux;
 260
 261   /* Flag word; legal values follow.  */
 262   unsigned short coff_link_hash_flags;
 263   /* Symbol is a PE section symbol.  */
 264 #define COFF_LINK_HASH_PE_SECTION_SYMBOL (01)
 265 };
 266
 267 /* COFF linker hash table.  */
 268
 269 struct coff_link_hash_table
 270 {
 271   struct bfd_link_hash_table root;
 272   /* A pointer to information used to link stabs in sections.  */
 273   struct stab_info stab_info;
 274 };
 275
 276 struct coff_reloc_cookie
 277 {
 278   struct internal_reloc *         rels;
 279   struct internal_reloc *         rel;
 280   struct internal_reloc *         relend;
 281   struct coff_symbol_struct *     symbols;      /* Symtab for input bfd.  */
 282   bfd *                           abfd;
 283   struct coff_link_hash_entry **  sym_hashes;
 284 };
 285
 286 /* Look up an entry in a COFF linker hash table.  */
 287
 288 #define coff_link_hash_lookup(table, string, create, copy, follow)      \
 289   ((struct coff_link_hash_entry *)                                      \
 290    bfd_link_hash_lookup (&(table)->root, (string), (create),            \
 291                          (copy), (follow)))
 292
 293 /* Traverse a COFF linker hash table.  */
 294
 295 #define coff_link_hash_traverse(table, func, info)                      \
 296   (bfd_link_hash_traverse                                               \
 297    (&(table)->root,                                                     \
 298     (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func), \
 299     (info)))
 300
 301 /* Get the COFF linker hash table from a link_info structure.  */
 302
 303 #define coff_hash_table(p) ((struct coff_link_hash_table *) ((p)->hash))
 304
 305 /* Functions in coffgen.c.  */
 306 extern bfd_cleanup coff_object_p
 307   (bfd *);
 308 extern struct bfd_section *coff_section_from_bfd_index
 309   (bfd *, int);
 310 extern long coff_get_symtab_upper_bound
 311   (bfd *);
 312 extern long coff_canonicalize_symtab
 313   (bfd *, asymbol **);
 314 extern int coff_count_linenumbers
 315   (bfd *);
 316 extern bfd_boolean coff_renumber_symbols
 317   (bfd *, int *);
 318 extern void coff_mangle_symbols
 319   (bfd *);
 320 extern bfd_boolean coff_write_symbols
 321   (bfd *);
 322 extern bfd_boolean coff_write_alien_symbol
 323   (bfd *, asymbol *, struct internal_syment *, union internal_auxent *,
 324    bfd_vma *, bfd_size_type *, asection **, bfd_size_type *);
 325 extern bfd_boolean coff_write_linenumbers
 326   (bfd *);
 327 extern alent *coff_get_lineno
 328   (bfd *, asymbol *);
 329 extern asymbol *coff_section_symbol
 330   (bfd *, char *);
 331 extern bfd_boolean _bfd_coff_get_external_symbols
 332   (bfd *);
 333 extern const char *_bfd_coff_read_string_table
 334   (bfd *);
 335 extern bfd_boolean _bfd_coff_free_symbols
 336   (bfd *);
 337 extern struct coff_ptr_struct *coff_get_normalized_symtab
 338   (bfd *);
 339 extern long coff_get_reloc_upper_bound
 340   (bfd *, sec_ptr);
 341 extern asymbol *coff_make_empty_symbol
 342   (bfd *);
 343 extern void coff_print_symbol
 344   (bfd *, void * filep, asymbol *, bfd_print_symbol_type);
 345 extern void coff_get_symbol_info
 346   (bfd *, asymbol *, symbol_info *ret);
 347 #define coff_get_symbol_version_string \
 348   _bfd_nosymbols_get_symbol_version_string
 349 extern bfd_boolean _bfd_coff_is_local_label_name
 350   (bfd *, const char *);
 351 extern asymbol *coff_bfd_make_debug_symbol
 352   (bfd *, void *, unsigned long);
 353 extern bfd_boolean coff_find_nearest_line
 354   (bfd *, asymbol **, asection *, bfd_vma,
 355    const char **, const char **, unsigned int *, unsigned int *);
 356 #define coff_find_line _bfd_nosymbols_find_line
 357 struct dwarf_debug_section;
 358 extern bfd_boolean coff_find_nearest_line_with_names
 359   (bfd *, asymbol **, asection *, bfd_vma, const char **, const char **,
 360    unsigned int *, const struct dwarf_debug_section *);
 361 extern bfd_boolean coff_find_inliner_info
 362   (bfd *, const char **, const char **, unsigned int *);
 363 extern int coff_sizeof_headers
 364   (bfd *, struct bfd_link_info *);
 365 extern bfd_boolean bfd_coff_reloc16_relax_section
 366   (bfd *, asection *, struct bfd_link_info *, bfd_boolean *);
 367 extern bfd_byte *bfd_coff_reloc16_get_relocated_section_contents
 368   (bfd *, struct bfd_link_info *, struct bfd_link_order *,
 369    bfd_byte *, bfd_boolean, asymbol **);
 370 extern bfd_vma bfd_coff_reloc16_get_value
 371   (arelent *, struct bfd_link_info *, asection *);
 372 extern void bfd_perform_slip
 373   (bfd *, unsigned int, asection *, bfd_vma);
 374 extern bfd_boolean _bfd_coff_close_and_cleanup
 375   (bfd *);
 376
 377 /* Functions and types in cofflink.c.  */
 378
 379 #define STRING_SIZE_SIZE 4
 380
 381 /* We use a hash table to merge identical enum, struct, and union
 382    definitions in the linker.  */
 383
 384 /* Information we keep for a single element (an enum value, a
 385    structure or union field) in the debug merge hash table.  */
 386
 387 struct coff_debug_merge_element
 388 {
 389   /* Next element.  */
 390   struct coff_debug_merge_element *next;
 391
 392   /* Name.  */
 393   const char *name;
 394
 395   /* Type.  */
 396   unsigned int type;
 397
 398   /* Symbol index for complex type.  */
 399   long tagndx;
 400 };
 401
 402 /* A linked list of debug merge entries for a given name.  */
 403
 404 struct coff_debug_merge_type
 405 {
 406   /* Next type with the same name.  */
 407   struct coff_debug_merge_type *next;
 408
 409   /* Class of type.  */
 410   int type_class;
 411
 412   /* Symbol index where this type is defined.  */
 413   long indx;
 414
 415   /* List of elements.  */
 416   struct coff_debug_merge_element *elements;
 417 };
 418
 419 /* Information we store in the debug merge hash table.  */
 420
 421 struct coff_debug_merge_hash_entry
 422 {
 423   struct bfd_hash_entry root;
 424
 425   /* A list of types with this name.  */
 426   struct coff_debug_merge_type *types;
 427 };
 428
 429 /* The debug merge hash table.  */
 430
 431 struct coff_debug_merge_hash_table
 432 {
 433   struct bfd_hash_table root;
 434 };
 435
 436 /* Initialize a COFF debug merge hash table.  */
 437
 438 #define coff_debug_merge_hash_table_init(table) \
 439   (bfd_hash_table_init (&(table)->root, _bfd_coff_debug_merge_hash_newfunc, \
 440                         sizeof (struct coff_debug_merge_hash_entry)))
 441
 442 /* Free a COFF debug merge hash table.  */
 443
 444 #define coff_debug_merge_hash_table_free(table) \
 445   (bfd_hash_table_free (&(table)->root))
 446
 447 /* Look up an entry in a COFF debug merge hash table.  */
 448
 449 #define coff_debug_merge_hash_lookup(table, string, create, copy) \
 450   ((struct coff_debug_merge_hash_entry *) \
 451    bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
 452
 453 /* Information we keep for each section in the output file when doing
 454    a relocatable link.  */
 455
 456 struct coff_link_section_info
 457 {
 458   /* The relocs to be output.  */
 459   struct internal_reloc *relocs;
 460   /* For each reloc against a global symbol whose index was not known
 461      when the reloc was handled, the global hash table entry.  */
 462   struct coff_link_hash_entry **rel_hashes;
 463 };
 464
 465 /* Information that we pass around while doing the final link step.  */
 466
 467 struct coff_final_link_info
 468 {
 469   /* General link information.  */
 470   struct bfd_link_info *info;
 471   /* Output BFD.  */
 472   bfd *output_bfd;
 473   /* Used to indicate failure in traversal routine.  */
 474   bfd_boolean failed;
 475   /* If doing "task linking" set only during the time when we want the
 476      global symbol writer to convert the storage class of defined global
 477      symbols from global to static. */
 478   bfd_boolean global_to_static;
 479   /* Hash table for long symbol names.  */
 480   struct bfd_strtab_hash *strtab;
 481   /* When doing a relocatable link, an array of information kept for
 482      each output section, indexed by the target_index field.  */
 483   struct coff_link_section_info *section_info;
 484   /* Symbol index of last C_FILE symbol (-1 if none).  */
 485   long last_file_index;
 486   /* Contents of last C_FILE symbol.  */
 487   struct internal_syment last_file;
 488   /* Symbol index of first aux entry of last .bf symbol with an empty
 489      endndx field (-1 if none).  */
 490   long last_bf_index;
 491   /* Contents of last_bf_index aux entry.  */
 492   union internal_auxent last_bf;
 493   /* Hash table used to merge debug information.  */
 494   struct coff_debug_merge_hash_table debug_merge;
 495   /* Buffer large enough to hold swapped symbols of any input file.  */
 496   struct internal_syment *internal_syms;
 497   /* Buffer large enough to hold sections of symbols of any input file.  */
 498   asection **sec_ptrs;
 499   /* Buffer large enough to hold output indices of symbols of any
 500      input file.  */
 501   long *sym_indices;
 502   /* Buffer large enough to hold output symbols for any input file.  */
 503   bfd_byte *outsyms;
 504   /* Buffer large enough to hold external line numbers for any input
 505      section.  */
 506   bfd_byte *linenos;
 507   /* Buffer large enough to hold any input section.  */
 508   bfd_byte *contents;
 509   /* Buffer large enough to hold external relocs of any input section.  */
 510   bfd_byte *external_relocs;
 511   /* Buffer large enough to hold swapped relocs of any input section.  */
 512   struct internal_reloc *internal_relocs;
 513 };
 514
 515 /* Most COFF variants have no way to record the alignment of a
 516    section.  This struct is used to set a specific alignment based on
 517    the name of the section.  */
 518
 519 struct coff_section_alignment_entry
 520 {
 521   /* The section name.  */
 522   const char *name;
 523
 524   /* This is either (unsigned int) -1, indicating that the section
 525      name must match exactly, or it is the number of letters which
 526      must match at the start of the name.  */
 527   unsigned int comparison_length;
 528
 529   /* These macros may be used to fill in the first two fields in a
 530      structure initialization.  */
 531 #define COFF_SECTION_NAME_EXACT_MATCH(name) (name), ((unsigned int) -1)
 532 #define COFF_SECTION_NAME_PARTIAL_MATCH(name) (name), (sizeof (name) - 1)
 533
 534   /* Only use this entry if the default section alignment for this
 535      target is at least that much (as a power of two).  If this field
 536      is COFF_ALIGNMENT_FIELD_EMPTY, it should be ignored.  */
 537   unsigned int default_alignment_min;
 538
 539   /* Only use this entry if the default section alignment for this
 540      target is no greater than this (as a power of two).  If this
 541      field is COFF_ALIGNMENT_FIELD_EMPTY, it should be ignored.  */
 542   unsigned int default_alignment_max;
 543
 544 #define COFF_ALIGNMENT_FIELD_EMPTY ((unsigned int) -1)
 545
 546   /* The desired alignment for this section (as a power of two).  */
 547   unsigned int alignment_power;
 548 };
 549
 550 extern struct bfd_hash_entry *_bfd_coff_link_hash_newfunc
 551   (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
 552 extern bfd_boolean _bfd_coff_link_hash_table_init
 553   (struct coff_link_hash_table *, bfd *,
 554    struct bfd_hash_entry *(*) (struct bfd_hash_entry *,
 555                                struct bfd_hash_table *,
 556                                const char *),
 557    unsigned int);
 558 extern struct bfd_link_hash_table *_bfd_coff_link_hash_table_create
 559   (bfd *);
 560 extern const char *_bfd_coff_internal_syment_name
 561   (bfd *, const struct internal_syment *, char *);
 562 extern bfd_boolean _bfd_coff_section_already_linked
 563   (bfd *, asection *, struct bfd_link_info *);
 564 extern bfd_boolean _bfd_coff_link_add_symbols
 565   (bfd *, struct bfd_link_info *);
 566 extern bfd_boolean _bfd_coff_final_link
 567   (bfd *, struct bfd_link_info *);
 568 extern struct internal_reloc *_bfd_coff_read_internal_relocs
 569   (bfd *, asection *, bfd_boolean, bfd_byte *, bfd_boolean,
 570    struct internal_reloc *);
 571 extern bfd_boolean _bfd_coff_generic_relocate_section
 572   (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
 573    struct internal_reloc *, struct internal_syment *, asection **);
 574 extern struct bfd_hash_entry *_bfd_coff_debug_merge_hash_newfunc
 575   (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
 576 extern bfd_boolean _bfd_coff_write_global_sym
 577   (struct bfd_hash_entry *, void *);
 578 extern bfd_boolean _bfd_coff_write_task_globals
 579   (struct coff_link_hash_entry *, void *);
 580 extern bfd_boolean _bfd_coff_link_input_bfd
 581   (struct coff_final_link_info *, bfd *);
 582 extern bfd_boolean _bfd_coff_reloc_link_order
 583   (bfd *, struct coff_final_link_info *, asection *,
 584    struct bfd_link_order *);
 585 extern bfd_boolean bfd_coff_gc_sections
 586   (bfd *, struct bfd_link_info *);
 587 extern const char *bfd_coff_group_name
 588   (bfd *, const asection *);
 589
 590 #define coff_get_section_contents_in_window \
 591   _bfd_generic_get_section_contents_in_window
 592
 593 /* Functions in xcofflink.c.  */
 594
 595 extern long _bfd_xcoff_get_dynamic_symtab_upper_bound
 596   (bfd *);
 597 extern long _bfd_xcoff_canonicalize_dynamic_symtab
 598   (bfd *, asymbol **);
 599 extern long _bfd_xcoff_get_dynamic_reloc_upper_bound
 600   (bfd *);
 601 extern long _bfd_xcoff_canonicalize_dynamic_reloc
 602   (bfd *, arelent **, asymbol **);
 603 extern struct bfd_link_hash_table *_bfd_xcoff_bfd_link_hash_table_create
 604   (bfd *);
 605 extern bfd_boolean _bfd_xcoff_bfd_link_add_symbols
 606   (bfd *, struct bfd_link_info *);
 607 extern bfd_boolean _bfd_xcoff_bfd_final_link
 608   (bfd *, struct bfd_link_info *);
 609 extern bfd_boolean _bfd_xcoff_define_common_symbol
 610   (bfd *, struct bfd_link_info *, struct bfd_link_hash_entry *);
 611 extern bfd_boolean _bfd_ppc_xcoff_relocate_section
 612   (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
 613    struct internal_reloc *, struct internal_syment *, asection **);
 614
 615 /* Functions in coff-ppc.c.  FIXME: These are called by pe.em in the
 616    linker, and so should start with bfd and be declared in bfd.h.  */
 617
 618 extern bfd_boolean ppc_allocate_toc_section
 619   (struct bfd_link_info *);
 620 extern bfd_boolean ppc_process_before_allocation
 621   (bfd *, struct bfd_link_info *);