bfd/libcoff-in.h

   1 /* BFD COFF object file private structure.
   2    Copyright (C) 1990-2014 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 #include "bfdlink.h"
  23
  24 /* Object file tdata; access macros.  */
  25
  26 #define coff_data(bfd)                ((bfd)->tdata.coff_obj_data)
  27 #define obj_pe(bfd)                   (coff_data (bfd)->pe)
  28 #define obj_symbols(bfd)              (coff_data (bfd)->symbols)
  29 #define obj_sym_filepos(bfd)          (coff_data (bfd)->sym_filepos)
  30 #define obj_relocbase(bfd)            (coff_data (bfd)->relocbase)
  31 #define obj_raw_syments(bfd)          (coff_data (bfd)->raw_syments)
  32 #define obj_raw_syment_count(bfd)     (coff_data (bfd)->raw_syment_count)
  33 #define obj_convert(bfd)              (coff_data (bfd)->conversion_table)
  34 #define obj_conv_table_size(bfd)      (coff_data (bfd)->conv_table_size)
  35 #define obj_coff_external_syms(bfd)   (coff_data (bfd)->external_syms)
  36 #define obj_coff_keep_syms(bfd)       (coff_data (bfd)->keep_syms)
  37 #define obj_coff_strings(bfd)         (coff_data (bfd)->strings)
  38 #define obj_coff_strings_len(bfd)     (coff_data (bfd)->strings_len)
  39 #define obj_coff_keep_strings(bfd)    (coff_data (bfd)->keep_strings)
  40 #define obj_coff_sym_hashes(bfd)      (coff_data (bfd)->sym_hashes)
  41 #define obj_coff_strings_written(bfd) (coff_data (bfd)->strings_written)
  42 #define obj_coff_local_toc_table(bfd) (coff_data (bfd)->local_toc_sym_map)
  43
  44 /* `Tdata' information kept for COFF files.  */
  45
  46 typedef struct coff_tdata
  47 {
  48   struct coff_symbol_struct *symbols;   /* Symtab for input bfd.  */
  49   unsigned int *conversion_table;
  50   int conv_table_size;
  51   file_ptr sym_filepos;
  52
  53   struct coff_ptr_struct *raw_syments;
  54   unsigned long raw_syment_count;
  55
  56   /* These are only valid once writing has begun.  */
  57   unsigned long int relocbase;
  58
  59   /* These members communicate important constants about the symbol table
  60      to GDB's symbol-reading code.  These `constants' unfortunately vary
  61      from coff implementation to implementation...  */
  62   unsigned local_n_btmask;
  63   unsigned local_n_btshft;
  64   unsigned local_n_tmask;
  65   unsigned local_n_tshift;
  66   unsigned local_symesz;
  67   unsigned local_auxesz;
  68   unsigned local_linesz;
  69
  70   /* The unswapped external symbols.  May be NULL.  Read by
  71      _bfd_coff_get_external_symbols.  */
  72   void * external_syms;
  73   /* If this is TRUE, the external_syms may not be freed.  */
  74   bfd_boolean keep_syms;
  75
  76   /* The string table.  May be NULL.  Read by
  77      _bfd_coff_read_string_table.  */
  78   char *strings;
  79   /* The length of the strings table.  For error checking.  */
  80   bfd_size_type strings_len;
  81   /* If this is TRUE, the strings may not be freed.  */
  82   bfd_boolean keep_strings;
  83   /* If this is TRUE, the strings have been written out already.  */
  84   bfd_boolean strings_written;
  85
  86   /* Is this a PE format coff file?  */
  87   int pe;
  88   /* Used by the COFF backend linker.  */
  89   struct coff_link_hash_entry **sym_hashes;
  90
  91   /* Used by the pe linker for PowerPC.  */
  92   int *local_toc_sym_map;
  93
  94   struct bfd_link_info *link_info;
  95
  96   /* Used by coff_find_nearest_line.  */
  97   void * line_info;
  98
  99   /* A place to stash dwarf2 info for this bfd.  */
 100   void * dwarf2_find_line_info;
 101
 102   /* The timestamp from the COFF file header.  */
 103   long timestamp;
 104
 105   /* Copy of some of the f_flags bits in the COFF filehdr structure,
 106      used by ARM code.  */
 107   flagword flags;
 108
 109   /* coff-stgo32 EXE stub header after BFD tdata has been allocated.  Its data
 110      is kept in internal_filehdr.go32stub beforehand.  */
 111   char *go32stub;
 112 } coff_data_type;
 113
 114 /* Tdata for pe image files.  */
 115 typedef struct pe_tdata
 116 {
 117   coff_data_type coff;
 118   struct internal_extra_pe_aouthdr pe_opthdr;
 119   int dll;
 120   int has_reloc_section;
 121   int dont_strip_reloc;
 122   bfd_boolean insert_timestamp;
 123   bfd_boolean (*in_reloc_p) (bfd *, reloc_howto_type *);
 124   flagword real_flags;
 125
 126   /* Build-id info.  */
 127   struct
 128   {
 129     bfd_boolean (*after_write_object_contents) (bfd *);
 130     const char *style;
 131     asection *sec;
 132   } build_id;
 133 } pe_data_type;
 134
 135 #define pe_data(bfd)            ((bfd)->tdata.pe_obj_data)
 136
 137 /* Tdata for XCOFF files.  */
 138
 139 struct xcoff_tdata
 140 {
 141   /* Basic COFF information.  */
 142   coff_data_type coff;
 143
 144   /* TRUE if this is an XCOFF64 file. */
 145   bfd_boolean xcoff64;
 146
 147   /* TRUE if a large a.out header should be generated.  */
 148   bfd_boolean full_aouthdr;
 149
 150   /* TOC value.  */
 151   bfd_vma toc;
 152
 153   /* Index of section holding TOC.  */
 154   int sntoc;
 155
 156   /* Index of section holding entry point.  */
 157   int snentry;
 158
 159   /* .text alignment from optional header.  */
 160   int text_align_power;
 161
 162   /* .data alignment from optional header.  */
 163   int data_align_power;
 164
 165   /* modtype from optional header.  */
 166   short modtype;
 167
 168   /* cputype from optional header.  */
 169   short cputype;
 170
 171   /* maxdata from optional header.  */
 172   bfd_vma maxdata;
 173
 174   /* maxstack from optional header.  */
 175   bfd_vma maxstack;
 176
 177   /* Used by the XCOFF backend linker.  */
 178   asection **csects;
 179   long *debug_indices;
 180   unsigned int *lineno_counts;
 181   unsigned int import_file_id;
 182 };
 183
 184 #define xcoff_data(abfd) ((abfd)->tdata.xcoff_obj_data)
 185
 186 /* We take the address of the first element of an asymbol to ensure that the
 187    macro is only ever applied to an asymbol.  */
 188 #define coffsymbol(asymbol) ((coff_symbol_type *)(&((asymbol)->the_bfd)))
 189
 190 /* The used_by_bfd field of a section may be set to a pointer to this
 191    structure.  */
 192
 193 struct coff_section_tdata
 194 {
 195   /* The relocs, swapped into COFF internal form.  This may be NULL.  */
 196   struct internal_reloc *relocs;
 197   /* If this is TRUE, the relocs entry may not be freed.  */
 198   bfd_boolean keep_relocs;
 199   /* The section contents.  This may be NULL.  */
 200   bfd_byte *contents;
 201   /* If this is TRUE, the contents entry may not be freed.  */
 202   bfd_boolean keep_contents;
 203   /* Information cached by coff_find_nearest_line.  */
 204   bfd_vma offset;
 205   unsigned int i;
 206   const char *function;
 207   /* Optional information about a COMDAT entry; NULL if not COMDAT. */
 208   struct coff_comdat_info *comdat;
 209   int line_base;
 210   /* A pointer used for .stab linking optimizations.  */
 211   void * stab_info;
 212   /* Available for individual backends.  */
 213   void * tdata;
 214 };
 215
 216 /* An accessor macro for the coff_section_tdata structure.  */
 217 #define coff_section_data(abfd, sec) \
 218   ((struct coff_section_tdata *) (sec)->used_by_bfd)
 219
 220 /* Tdata for sections in XCOFF files.  This is used by the linker.  */
 221
 222 struct xcoff_section_tdata
 223 {
 224   /* Used for XCOFF csects created by the linker; points to the real
 225      XCOFF section which contains this csect.  */
 226   asection *enclosing;
 227   /* The lineno_count field for the enclosing section, because we are
 228      going to clobber it there.  */
 229   unsigned int lineno_count;
 230   /* The first and last symbol indices for symbols used by this csect.  */
 231   unsigned long first_symndx;
 232   unsigned long last_symndx;
 233 };
 234
 235 /* An accessor macro the xcoff_section_tdata structure.  */
 236 #define xcoff_section_data(abfd, sec) \
 237   ((struct xcoff_section_tdata *) coff_section_data ((abfd), (sec))->tdata)
 238
 239 /* Tdata for sections in PE files.  */
 240
 241 struct pei_section_tdata
 242 {
 243   /* The virtual size of the section.  */
 244   bfd_size_type virt_size;
 245   /* The PE section flags.  */
 246   long pe_flags;
 247 };
 248
 249 /* An accessor macro for the pei_section_tdata structure.  */
 250 #define pei_section_data(abfd, sec) \
 251   ((struct pei_section_tdata *) coff_section_data ((abfd), (sec))->tdata)
 252
 253 /* COFF linker hash table entries.  */
 254
 255 struct coff_link_hash_entry
 256 {
 257   struct bfd_link_hash_entry root;
 258
 259   /* Symbol index in output file.  Set to -1 initially.  Set to -2 if
 260      there is a reloc against this symbol.  */
 261   long indx;
 262
 263   /* Symbol type.  */
 264   unsigned short type;
 265
 266   /* Symbol class.  */
 267   unsigned char symbol_class;
 268
 269   /* Number of auxiliary entries.  */
 270   char numaux;
 271
 272   /* BFD to take auxiliary entries from.  */
 273   bfd *auxbfd;
 274
 275   /* Pointer to array of auxiliary entries, if any.  */
 276   union internal_auxent *aux;
 277
 278   /* Flag word; legal values follow.  */
 279   unsigned short coff_link_hash_flags;
 280   /* Symbol is a PE section symbol.  */
 281 #define COFF_LINK_HASH_PE_SECTION_SYMBOL (01)
 282 };
 283
 284 /* COFF linker hash table.  */
 285
 286 struct coff_link_hash_table
 287 {
 288   struct bfd_link_hash_table root;
 289   /* A pointer to information used to link stabs in sections.  */
 290   struct stab_info stab_info;
 291 };
 292
 293 /* Look up an entry in a COFF linker hash table.  */
 294
 295 #define coff_link_hash_lookup(table, string, create, copy, follow)      \
 296   ((struct coff_link_hash_entry *)                                      \
 297    bfd_link_hash_lookup (&(table)->root, (string), (create),            \
 298                          (copy), (follow)))
 299
 300 /* Traverse a COFF linker hash table.  */
 301
 302 #define coff_link_hash_traverse(table, func, info)                      \
 303   (bfd_link_hash_traverse                                               \
 304    (&(table)->root,                                                     \
 305     (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func), \
 306     (info)))
 307
 308 /* Get the COFF linker hash table from a link_info structure.  */
 309
 310 #define coff_hash_table(p) ((struct coff_link_hash_table *) ((p)->hash))
 311
 312 /* Functions in coffgen.c.  */
 313 extern const bfd_target *coff_object_p
 314   (bfd *);
 315 extern struct bfd_section *coff_section_from_bfd_index
 316   (bfd *, int);
 317 extern long coff_get_symtab_upper_bound
 318   (bfd *);
 319 extern long coff_canonicalize_symtab
 320   (bfd *, asymbol **);
 321 extern int coff_count_linenumbers
 322   (bfd *);
 323 extern struct coff_symbol_struct *coff_symbol_from
 324   (bfd *, asymbol *);
 325 extern bfd_boolean coff_renumber_symbols
 326   (bfd *, int *);
 327 extern void coff_mangle_symbols
 328   (bfd *);
 329 extern bfd_boolean coff_write_symbols
 330   (bfd *);
 331 extern bfd_boolean coff_write_alien_symbol
 332   (bfd *, asymbol *, struct internal_syment *, bfd_vma *,
 333    bfd_size_type *, asection **, bfd_size_type *);
 334 extern bfd_boolean coff_write_linenumbers
 335   (bfd *);
 336 extern alent *coff_get_lineno
 337   (bfd *, asymbol *);
 338 extern asymbol *coff_section_symbol
 339   (bfd *, char *);
 340 extern bfd_boolean _bfd_coff_get_external_symbols
 341   (bfd *);
 342 extern const char *_bfd_coff_read_string_table
 343   (bfd *);
 344 extern bfd_boolean _bfd_coff_free_symbols
 345   (bfd *);
 346 extern struct coff_ptr_struct *coff_get_normalized_symtab
 347   (bfd *);
 348 extern long coff_get_reloc_upper_bound
 349   (bfd *, sec_ptr);
 350 extern asymbol *coff_make_empty_symbol
 351   (bfd *);
 352 extern void coff_print_symbol
 353   (bfd *, void * filep, asymbol *, bfd_print_symbol_type);
 354 extern void coff_get_symbol_info
 355   (bfd *, asymbol *, symbol_info *ret);
 356 #define coff_get_symbol_version_string \
 357   _bfd_nosymbols_get_symbol_version_string
 358 extern bfd_boolean _bfd_coff_is_local_label_name
 359   (bfd *, const char *);
 360 extern asymbol *coff_bfd_make_debug_symbol
 361   (bfd *, void *, unsigned long);
 362 extern bfd_boolean coff_find_nearest_line
 363   (bfd *, asymbol **, asection *, bfd_vma,
 364    const char **, const char **, unsigned int *, unsigned int *);
 365 #define coff_find_line _bfd_nosymbols_find_line
 366 struct dwarf_debug_section;
 367 extern bfd_boolean coff_find_nearest_line_with_names
 368   (bfd *, asymbol **, asection *, bfd_vma, const char **, const char **,
 369    unsigned int *, const struct dwarf_debug_section *);
 370 extern bfd_boolean coff_find_inliner_info
 371   (bfd *, const char **, const char **, unsigned int *);
 372 extern int coff_sizeof_headers
 373   (bfd *, struct bfd_link_info *);
 374 extern bfd_boolean bfd_coff_reloc16_relax_section
 375   (bfd *, asection *, struct bfd_link_info *, bfd_boolean *);
 376 extern bfd_byte *bfd_coff_reloc16_get_relocated_section_contents
 377   (bfd *, struct bfd_link_info *, struct bfd_link_order *,
 378    bfd_byte *, bfd_boolean, asymbol **);
 379 extern bfd_vma bfd_coff_reloc16_get_value
 380   (arelent *, struct bfd_link_info *, asection *);
 381 extern void bfd_perform_slip
 382   (bfd *, unsigned int, asection *, bfd_vma);
 383
 384 /* Functions and types in cofflink.c.  */
 385
 386 #define STRING_SIZE_SIZE 4
 387
 388 /* We use a hash table to merge identical enum, struct, and union
 389    definitions in the linker.  */
 390
 391 /* Information we keep for a single element (an enum value, a
 392    structure or union field) in the debug merge hash table.  */
 393
 394 struct coff_debug_merge_element
 395 {
 396   /* Next element.  */
 397   struct coff_debug_merge_element *next;
 398
 399   /* Name.  */
 400   const char *name;
 401
 402   /* Type.  */
 403   unsigned int type;
 404
 405   /* Symbol index for complex type.  */
 406   long tagndx;
 407 };
 408
 409 /* A linked list of debug merge entries for a given name.  */
 410
 411 struct coff_debug_merge_type
 412 {
 413   /* Next type with the same name.  */
 414   struct coff_debug_merge_type *next;
 415
 416   /* Class of type.  */
 417   int type_class;
 418
 419   /* Symbol index where this type is defined.  */
 420   long indx;
 421
 422   /* List of elements.  */
 423   struct coff_debug_merge_element *elements;
 424 };
 425
 426 /* Information we store in the debug merge hash table.  */
 427
 428 struct coff_debug_merge_hash_entry
 429 {
 430   struct bfd_hash_entry root;
 431
 432   /* A list of types with this name.  */
 433   struct coff_debug_merge_type *types;
 434 };
 435
 436 /* The debug merge hash table.  */
 437
 438 struct coff_debug_merge_hash_table
 439 {
 440   struct bfd_hash_table root;
 441 };
 442
 443 /* Initialize a COFF debug merge hash table.  */
 444
 445 #define coff_debug_merge_hash_table_init(table) \
 446   (bfd_hash_table_init (&(table)->root, _bfd_coff_debug_merge_hash_newfunc, \
 447                         sizeof (struct coff_debug_merge_hash_entry)))
 448
 449 /* Free a COFF debug merge hash table.  */
 450
 451 #define coff_debug_merge_hash_table_free(table) \
 452   (bfd_hash_table_free (&(table)->root))
 453
 454 /* Look up an entry in a COFF debug merge hash table.  */
 455
 456 #define coff_debug_merge_hash_lookup(table, string, create, copy) \
 457   ((struct coff_debug_merge_hash_entry *) \
 458    bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
 459
 460 /* Information we keep for each section in the output file when doing
 461    a relocatable link.  */
 462
 463 struct coff_link_section_info
 464 {
 465   /* The relocs to be output.  */
 466   struct internal_reloc *relocs;
 467   /* For each reloc against a global symbol whose index was not known
 468      when the reloc was handled, the global hash table entry.  */
 469   struct coff_link_hash_entry **rel_hashes;
 470 };
 471
 472 /* Information that we pass around while doing the final link step.  */
 473
 474 struct coff_final_link_info
 475 {
 476   /* General link information.  */
 477   struct bfd_link_info *info;
 478   /* Output BFD.  */
 479   bfd *output_bfd;
 480   /* Used to indicate failure in traversal routine.  */
 481   bfd_boolean failed;
 482   /* If doing "task linking" set only during the time when we want the
 483      global symbol writer to convert the storage class of defined global
 484      symbols from global to static. */
 485   bfd_boolean global_to_static;
 486   /* Hash table for long symbol names.  */
 487   struct bfd_strtab_hash *strtab;
 488   /* When doing a relocatable link, an array of information kept for
 489      each output section, indexed by the target_index field.  */
 490   struct coff_link_section_info *section_info;
 491   /* Symbol index of last C_FILE symbol (-1 if none).  */
 492   long last_file_index;
 493   /* Contents of last C_FILE symbol.  */
 494   struct internal_syment last_file;
 495   /* Symbol index of first aux entry of last .bf symbol with an empty
 496      endndx field (-1 if none).  */
 497   long last_bf_index;
 498   /* Contents of last_bf_index aux entry.  */
 499   union internal_auxent last_bf;
 500   /* Hash table used to merge debug information.  */
 501   struct coff_debug_merge_hash_table debug_merge;
 502   /* Buffer large enough to hold swapped symbols of any input file.  */
 503   struct internal_syment *internal_syms;
 504   /* Buffer large enough to hold sections of symbols of any input file.  */
 505   asection **sec_ptrs;
 506   /* Buffer large enough to hold output indices of symbols of any
 507      input file.  */
 508   long *sym_indices;
 509   /* Buffer large enough to hold output symbols for any input file.  */
 510   bfd_byte *outsyms;
 511   /* Buffer large enough to hold external line numbers for any input
 512      section.  */
 513   bfd_byte *linenos;
 514   /* Buffer large enough to hold any input section.  */
 515   bfd_byte *contents;
 516   /* Buffer large enough to hold external relocs of any input section.  */
 517   bfd_byte *external_relocs;
 518   /* Buffer large enough to hold swapped relocs of any input section.  */
 519   struct internal_reloc *internal_relocs;
 520 };
 521
 522 /* Most COFF variants have no way to record the alignment of a
 523    section.  This struct is used to set a specific alignment based on
 524    the name of the section.  */
 525
 526 struct coff_section_alignment_entry
 527 {
 528   /* The section name.  */
 529   const char *name;
 530
 531   /* This is either (unsigned int) -1, indicating that the section
 532      name must match exactly, or it is the number of letters which
 533      must match at the start of the name.  */
 534   unsigned int comparison_length;
 535
 536   /* These macros may be used to fill in the first two fields in a
 537      structure initialization.  */
 538 #define COFF_SECTION_NAME_EXACT_MATCH(name) (name), ((unsigned int) -1)
 539 #define COFF_SECTION_NAME_PARTIAL_MATCH(name) (name), (sizeof (name) - 1)
 540
 541   /* Only use this entry if the default section alignment for this
 542      target is at least that much (as a power of two).  If this field
 543      is COFF_ALIGNMENT_FIELD_EMPTY, it should be ignored.  */
 544   unsigned int default_alignment_min;
 545
 546   /* Only use this entry if the default section alignment for this
 547      target is no greater than this (as a power of two).  If this
 548      field is COFF_ALIGNMENT_FIELD_EMPTY, it should be ignored.  */
 549   unsigned int default_alignment_max;
 550
 551 #define COFF_ALIGNMENT_FIELD_EMPTY ((unsigned int) -1)
 552
 553   /* The desired alignment for this section (as a power of two).  */
 554   unsigned int alignment_power;
 555 };
 556
 557 extern struct bfd_hash_entry *_bfd_coff_link_hash_newfunc
 558   (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
 559 extern bfd_boolean _bfd_coff_link_hash_table_init
 560   (struct coff_link_hash_table *, bfd *,
 561    struct bfd_hash_entry *(*) (struct bfd_hash_entry *,
 562                                struct bfd_hash_table *,
 563                                const char *),
 564    unsigned int);
 565 extern struct bfd_link_hash_table *_bfd_coff_link_hash_table_create
 566   (bfd *);
 567 extern const char *_bfd_coff_internal_syment_name
 568   (bfd *, const struct internal_syment *, char *);
 569 extern bfd_boolean _bfd_coff_section_already_linked
 570   (bfd *, asection *, struct bfd_link_info *);
 571 extern bfd_boolean _bfd_coff_link_add_symbols
 572   (bfd *, struct bfd_link_info *);
 573 extern bfd_boolean _bfd_coff_final_link
 574   (bfd *, struct bfd_link_info *);
 575 extern struct internal_reloc *_bfd_coff_read_internal_relocs
 576   (bfd *, asection *, bfd_boolean, bfd_byte *, bfd_boolean,
 577    struct internal_reloc *);
 578 extern bfd_boolean _bfd_coff_generic_relocate_section
 579   (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
 580    struct internal_reloc *, struct internal_syment *, asection **);
 581 extern struct bfd_hash_entry *_bfd_coff_debug_merge_hash_newfunc
 582   (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
 583 extern bfd_boolean _bfd_coff_write_global_sym
 584   (struct bfd_hash_entry *, void *);
 585 extern bfd_boolean _bfd_coff_write_task_globals
 586   (struct coff_link_hash_entry *, void *);
 587 extern bfd_boolean _bfd_coff_link_input_bfd
 588   (struct coff_final_link_info *, bfd *);
 589 extern bfd_boolean _bfd_coff_reloc_link_order
 590   (bfd *, struct coff_final_link_info *, asection *,
 591    struct bfd_link_order *);
 592
 593
 594 #define coff_get_section_contents_in_window \
 595   _bfd_generic_get_section_contents_in_window
 596
 597 /* Functions in xcofflink.c.  */
 598
 599 extern long _bfd_xcoff_get_dynamic_symtab_upper_bound
 600   (bfd *);
 601 extern long _bfd_xcoff_canonicalize_dynamic_symtab
 602   (bfd *, asymbol **);
 603 extern long _bfd_xcoff_get_dynamic_reloc_upper_bound
 604   (bfd *);
 605 extern long _bfd_xcoff_canonicalize_dynamic_reloc
 606   (bfd *, arelent **, asymbol **);
 607 extern struct bfd_link_hash_table *_bfd_xcoff_bfd_link_hash_table_create
 608   (bfd *);
 609 extern bfd_boolean _bfd_xcoff_bfd_link_add_symbols
 610   (bfd *, struct bfd_link_info *);
 611 extern bfd_boolean _bfd_xcoff_bfd_final_link
 612   (bfd *, struct bfd_link_info *);
 613 extern bfd_boolean _bfd_xcoff_define_common_symbol
 614   (bfd *, struct bfd_link_info *, struct bfd_link_hash_entry *);
 615 extern bfd_boolean _bfd_ppc_xcoff_relocate_section
 616   (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
 617    struct internal_reloc *, struct internal_syment *, asection **);
 618
 619 /* Functions in coff-ppc.c.  FIXME: These are called by pe.em in the
 620    linker, and so should start with bfd and be declared in bfd.h.  */
 621
 622 extern bfd_boolean ppc_allocate_toc_section
 623   (struct bfd_link_info *);
 624 extern bfd_boolean ppc_process_before_allocation
 625   (bfd *, struct bfd_link_info *);