bfd/libcoff-in.h

   1 /* BFD COFF object file private structure.
   2    Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
   3    2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
   4    Free Software Foundation, Inc.
   5    Written by Cygnus Support.
   6
   7    This file is part of BFD, the Binary File Descriptor library.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  22    MA 02110-1301, USA.  */
  23
  24 #include "bfdlink.h"
  25
  26 /* Object file tdata; access macros.  */
  27
  28 #define coff_data(bfd)                ((bfd)->tdata.coff_obj_data)
  29 #define obj_pe(bfd)                   (coff_data (bfd)->pe)
  30 #define obj_symbols(bfd)              (coff_data (bfd)->symbols)
  31 #define obj_sym_filepos(bfd)          (coff_data (bfd)->sym_filepos)
  32 #define obj_relocbase(bfd)            (coff_data (bfd)->relocbase)
  33 #define obj_raw_syments(bfd)          (coff_data (bfd)->raw_syments)
  34 #define obj_raw_syment_count(bfd)     (coff_data (bfd)->raw_syment_count)
  35 #define obj_convert(bfd)              (coff_data (bfd)->conversion_table)
  36 #define obj_conv_table_size(bfd)      (coff_data (bfd)->conv_table_size)
  37 #define obj_coff_external_syms(bfd)   (coff_data (bfd)->external_syms)
  38 #define obj_coff_keep_syms(bfd)       (coff_data (bfd)->keep_syms)
  39 #define obj_coff_strings(bfd)         (coff_data (bfd)->strings)
  40 #define obj_coff_keep_strings(bfd)    (coff_data (bfd)->keep_strings)
  41 #define obj_coff_sym_hashes(bfd)      (coff_data (bfd)->sym_hashes)
  42 #define obj_coff_strings_written(bfd) (coff_data (bfd)->strings_written)
  43 #define obj_coff_local_toc_table(bfd) (coff_data (bfd)->local_toc_sym_map)
  44
  45 /* `Tdata' information kept for COFF files.  */
  46
  47 typedef struct coff_tdata
  48 {
  49   struct coff_symbol_struct *symbols;   /* Symtab for input bfd.  */
  50   unsigned int *conversion_table;
  51   int conv_table_size;
  52   file_ptr sym_filepos;
  53
  54   struct coff_ptr_struct *raw_syments;
  55   unsigned long raw_syment_count;
  56
  57   /* These are only valid once writing has begun.  */
  58   long int relocbase;
  59
  60   /* These members communicate important constants about the symbol table
  61      to GDB's symbol-reading code.  These `constants' unfortunately vary
  62      from coff implementation to implementation...  */
  63   unsigned local_n_btmask;
  64   unsigned local_n_btshft;
  65   unsigned local_n_tmask;
  66   unsigned local_n_tshift;
  67   unsigned local_symesz;
  68   unsigned local_auxesz;
  69   unsigned local_linesz;
  70
  71   /* The unswapped external symbols.  May be NULL.  Read by
  72      _bfd_coff_get_external_symbols.  */
  73   void * external_syms;
  74   /* If this is TRUE, the external_syms may not be freed.  */
  75   bfd_boolean keep_syms;
  76
  77   /* The string table.  May be NULL.  Read by
  78      _bfd_coff_read_string_table.  */
  79   char *strings;
  80   /* If this is TRUE, the strings may not be freed.  */
  81   bfd_boolean keep_strings;
  82   /* If this is TRUE, the strings have been written out already.  */
  83   bfd_boolean strings_written;
  84
  85   /* Is this a PE format coff file?  */
  86   int pe;
  87   /* Used by the COFF backend linker.  */
  88   struct coff_link_hash_entry **sym_hashes;
  89
  90   /* Used by the pe linker for PowerPC.  */
  91   int *local_toc_sym_map;
  92
  93   struct bfd_link_info *link_info;
  94
  95   /* Used by coff_find_nearest_line.  */
  96   void * line_info;
  97
  98   /* A place to stash dwarf2 info for this bfd.  */
  99   void * dwarf2_find_line_info;
 100
 101   /* The timestamp from the COFF file header.  */
 102   long timestamp;
 103
 104   /* Copy of some of the f_flags bits in the COFF filehdr structure,
 105      used by ARM code.  */
 106   flagword flags;
 107
 108   /* coff-stgo32 EXE stub header after BFD tdata has been allocated.  Its data
 109      is kept in internal_filehdr.go32stub beforehand.  */
 110   char *go32stub;
 111 } coff_data_type;
 112
 113 /* Tdata for pe image files.  */
 114 typedef struct pe_tdata
 115 {
 116   coff_data_type coff;
 117   struct internal_extra_pe_aouthdr pe_opthdr;
 118   int dll;
 119   int has_reloc_section;
 120   int dont_strip_reloc;
 121   bfd_boolean (*in_reloc_p) (bfd *, reloc_howto_type *);
 122   flagword real_flags;
 123 } pe_data_type;
 124
 125 #define pe_data(bfd)            ((bfd)->tdata.pe_obj_data)
 126
 127 /* Tdata for XCOFF files.  */
 128
 129 struct xcoff_tdata
 130 {
 131   /* Basic COFF information.  */
 132   coff_data_type coff;
 133
 134   /* TRUE if this is an XCOFF64 file. */
 135   bfd_boolean xcoff64;
 136
 137   /* TRUE if a large a.out header should be generated.  */
 138   bfd_boolean full_aouthdr;
 139
 140   /* TOC value.  */
 141   bfd_vma toc;
 142
 143   /* Index of section holding TOC.  */
 144   int sntoc;
 145
 146   /* Index of section holding entry point.  */
 147   int snentry;
 148
 149   /* .text alignment from optional header.  */
 150   int text_align_power;
 151
 152   /* .data alignment from optional header.  */
 153   int data_align_power;
 154
 155   /* modtype from optional header.  */
 156   short modtype;
 157
 158   /* cputype from optional header.  */
 159   short cputype;
 160
 161   /* maxdata from optional header.  */
 162   bfd_vma maxdata;
 163
 164   /* maxstack from optional header.  */
 165   bfd_vma maxstack;
 166
 167   /* Used by the XCOFF backend linker.  */
 168   asection **csects;
 169   long *debug_indices;
 170   unsigned int *lineno_counts;
 171   unsigned int import_file_id;
 172 };
 173
 174 #define xcoff_data(abfd) ((abfd)->tdata.xcoff_obj_data)
 175
 176 /* We take the address of the first element of an asymbol to ensure that the
 177    macro is only ever applied to an asymbol.  */
 178 #define coffsymbol(asymbol) ((coff_symbol_type *)(&((asymbol)->the_bfd)))
 179
 180 /* The used_by_bfd field of a section may be set to a pointer to this
 181    structure.  */
 182
 183 struct coff_section_tdata
 184 {
 185   /* The relocs, swapped into COFF internal form.  This may be NULL.  */
 186   struct internal_reloc *relocs;
 187   /* If this is TRUE, the relocs entry may not be freed.  */
 188   bfd_boolean keep_relocs;
 189   /* The section contents.  This may be NULL.  */
 190   bfd_byte *contents;
 191   /* If this is TRUE, the contents entry may not be freed.  */
 192   bfd_boolean keep_contents;
 193   /* Information cached by coff_find_nearest_line.  */
 194   bfd_vma offset;
 195   unsigned int i;
 196   const char *function;
 197   /* Optional information about a COMDAT entry; NULL if not COMDAT. */
 198   struct coff_comdat_info *comdat;
 199   int line_base;
 200   /* A pointer used for .stab linking optimizations.  */
 201   void * stab_info;
 202   /* Available for individual backends.  */
 203   void * tdata;
 204 };
 205
 206 /* An accessor macro for the coff_section_tdata structure.  */
 207 #define coff_section_data(abfd, sec) \
 208   ((struct coff_section_tdata *) (sec)->used_by_bfd)
 209
 210 /* Tdata for sections in XCOFF files.  This is used by the linker.  */
 211
 212 struct xcoff_section_tdata
 213 {
 214   /* Used for XCOFF csects created by the linker; points to the real
 215      XCOFF section which contains this csect.  */
 216   asection *enclosing;
 217   /* The lineno_count field for the enclosing section, because we are
 218      going to clobber it there.  */
 219   unsigned int lineno_count;
 220   /* The first and last symbol indices for symbols used by this csect.  */
 221   unsigned long first_symndx;
 222   unsigned long last_symndx;
 223 };
 224
 225 /* An accessor macro the xcoff_section_tdata structure.  */
 226 #define xcoff_section_data(abfd, sec) \
 227   ((struct xcoff_section_tdata *) coff_section_data ((abfd), (sec))->tdata)
 228
 229 /* Tdata for sections in PE files.  */
 230
 231 struct pei_section_tdata
 232 {
 233   /* The virtual size of the section.  */
 234   bfd_size_type virt_size;
 235   /* The PE section flags.  */
 236   long pe_flags;
 237 };
 238
 239 /* An accessor macro for the pei_section_tdata structure.  */
 240 #define pei_section_data(abfd, sec) \
 241   ((struct pei_section_tdata *) coff_section_data ((abfd), (sec))->tdata)
 242
 243 /* COFF linker hash table entries.  */
 244
 245 struct coff_link_hash_entry
 246 {
 247   struct bfd_link_hash_entry root;
 248
 249   /* Symbol index in output file.  Set to -1 initially.  Set to -2 if
 250      there is a reloc against this symbol.  */
 251   long indx;
 252
 253   /* Symbol type.  */
 254   unsigned short type;
 255
 256   /* Symbol class.  */
 257   unsigned char symbol_class;
 258
 259   /* Number of auxiliary entries.  */
 260   char numaux;
 261
 262   /* BFD to take auxiliary entries from.  */
 263   bfd *auxbfd;
 264
 265   /* Pointer to array of auxiliary entries, if any.  */
 266   union internal_auxent *aux;
 267
 268   /* Flag word; legal values follow.  */
 269   unsigned short coff_link_hash_flags;
 270   /* Symbol is a PE section symbol.  */
 271 #define COFF_LINK_HASH_PE_SECTION_SYMBOL (01)
 272 };
 273
 274 /* COFF linker hash table.  */
 275
 276 struct coff_link_hash_table
 277 {
 278   struct bfd_link_hash_table root;
 279   /* A pointer to information used to link stabs in sections.  */
 280   struct stab_info stab_info;
 281 };
 282
 283 /* Look up an entry in a COFF linker hash table.  */
 284
 285 #define coff_link_hash_lookup(table, string, create, copy, follow)      \
 286   ((struct coff_link_hash_entry *)                                      \
 287    bfd_link_hash_lookup (&(table)->root, (string), (create),            \
 288                          (copy), (follow)))
 289
 290 /* Traverse a COFF linker hash table.  */
 291
 292 #define coff_link_hash_traverse(table, func, info)                      \
 293   (bfd_link_hash_traverse                                               \
 294    (&(table)->root,                                                     \
 295     (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func), \
 296     (info)))
 297
 298 /* Get the COFF linker hash table from a link_info structure.  */
 299
 300 #define coff_hash_table(p) ((struct coff_link_hash_table *) ((p)->hash))
 301
 302 /* Functions in coffgen.c.  */
 303 extern const bfd_target *coff_object_p
 304   (bfd *);
 305 extern struct bfd_section *coff_section_from_bfd_index
 306   (bfd *, int);
 307 extern long coff_get_symtab_upper_bound
 308   (bfd *);
 309 extern long coff_canonicalize_symtab
 310   (bfd *, asymbol **);
 311 extern int coff_count_linenumbers
 312   (bfd *);
 313 extern struct coff_symbol_struct *coff_symbol_from
 314   (bfd *, asymbol *);
 315 extern bfd_boolean coff_renumber_symbols
 316   (bfd *, int *);
 317 extern void coff_mangle_symbols
 318   (bfd *);
 319 extern bfd_boolean coff_write_symbols
 320   (bfd *);
 321 extern bfd_boolean coff_write_linenumbers
 322   (bfd *);
 323 extern alent *coff_get_lineno
 324   (bfd *, asymbol *);
 325 extern asymbol *coff_section_symbol
 326   (bfd *, char *);
 327 extern bfd_boolean _bfd_coff_get_external_symbols
 328   (bfd *);
 329 extern const char *_bfd_coff_read_string_table
 330   (bfd *);
 331 extern bfd_boolean _bfd_coff_free_symbols
 332   (bfd *);
 333 extern struct coff_ptr_struct *coff_get_normalized_symtab
 334   (bfd *);
 335 extern long coff_get_reloc_upper_bound
 336   (bfd *, sec_ptr);
 337 extern asymbol *coff_make_empty_symbol
 338   (bfd *);
 339 extern void coff_print_symbol
 340   (bfd *, void * filep, asymbol *, bfd_print_symbol_type);
 341 extern void coff_get_symbol_info
 342   (bfd *, asymbol *, symbol_info *ret);
 343 extern bfd_boolean _bfd_coff_is_local_label_name
 344   (bfd *, const char *);
 345 extern asymbol *coff_bfd_make_debug_symbol
 346   (bfd *, void *, unsigned long);
 347 extern bfd_boolean coff_find_nearest_line
 348   (bfd *, asection *, asymbol **, bfd_vma, const char **,
 349    const char **, unsigned int *);
 350 struct dwarf_debug_section;
 351 extern bfd_boolean coff_find_nearest_line_with_names
 352   (bfd *, const struct dwarf_debug_section *, asection *, asymbol **,
 353    bfd_vma, const char **, const char **, unsigned int *);
 354 extern bfd_boolean coff_find_inliner_info
 355   (bfd *, const char **, const char **, unsigned int *);
 356 extern int coff_sizeof_headers
 357   (bfd *, struct bfd_link_info *);
 358 extern bfd_boolean bfd_coff_reloc16_relax_section
 359   (bfd *, asection *, struct bfd_link_info *, bfd_boolean *);
 360 extern bfd_byte *bfd_coff_reloc16_get_relocated_section_contents
 361   (bfd *, struct bfd_link_info *, struct bfd_link_order *,
 362    bfd_byte *, bfd_boolean, asymbol **);
 363 extern bfd_vma bfd_coff_reloc16_get_value
 364   (arelent *, struct bfd_link_info *, asection *);
 365 extern void bfd_perform_slip
 366   (bfd *, unsigned int, asection *, bfd_vma);
 367
 368 /* Functions and types in cofflink.c.  */
 369
 370 #define STRING_SIZE_SIZE 4
 371
 372 /* We use a hash table to merge identical enum, struct, and union
 373    definitions in the linker.  */
 374
 375 /* Information we keep for a single element (an enum value, a
 376    structure or union field) in the debug merge hash table.  */
 377
 378 struct coff_debug_merge_element
 379 {
 380   /* Next element.  */
 381   struct coff_debug_merge_element *next;
 382
 383   /* Name.  */
 384   const char *name;
 385
 386   /* Type.  */
 387   unsigned int type;
 388
 389   /* Symbol index for complex type.  */
 390   long tagndx;
 391 };
 392
 393 /* A linked list of debug merge entries for a given name.  */
 394
 395 struct coff_debug_merge_type
 396 {
 397   /* Next type with the same name.  */
 398   struct coff_debug_merge_type *next;
 399
 400   /* Class of type.  */
 401   int type_class;
 402
 403   /* Symbol index where this type is defined.  */
 404   long indx;
 405
 406   /* List of elements.  */
 407   struct coff_debug_merge_element *elements;
 408 };
 409
 410 /* Information we store in the debug merge hash table.  */
 411
 412 struct coff_debug_merge_hash_entry
 413 {
 414   struct bfd_hash_entry root;
 415
 416   /* A list of types with this name.  */
 417   struct coff_debug_merge_type *types;
 418 };
 419
 420 /* The debug merge hash table.  */
 421
 422 struct coff_debug_merge_hash_table
 423 {
 424   struct bfd_hash_table root;
 425 };
 426
 427 /* Initialize a COFF debug merge hash table.  */
 428
 429 #define coff_debug_merge_hash_table_init(table) \
 430   (bfd_hash_table_init (&(table)->root, _bfd_coff_debug_merge_hash_newfunc, \
 431                         sizeof (struct coff_debug_merge_hash_entry)))
 432
 433 /* Free a COFF debug merge hash table.  */
 434
 435 #define coff_debug_merge_hash_table_free(table) \
 436   (bfd_hash_table_free (&(table)->root))
 437
 438 /* Look up an entry in a COFF debug merge hash table.  */
 439
 440 #define coff_debug_merge_hash_lookup(table, string, create, copy) \
 441   ((struct coff_debug_merge_hash_entry *) \
 442    bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
 443
 444 /* Information we keep for each section in the output file when doing
 445    a relocatable link.  */
 446
 447 struct coff_link_section_info
 448 {
 449   /* The relocs to be output.  */
 450   struct internal_reloc *relocs;
 451   /* For each reloc against a global symbol whose index was not known
 452      when the reloc was handled, the global hash table entry.  */
 453   struct coff_link_hash_entry **rel_hashes;
 454 };
 455
 456 /* Information that we pass around while doing the final link step.  */
 457
 458 struct coff_final_link_info
 459 {
 460   /* General link information.  */
 461   struct bfd_link_info *info;
 462   /* Output BFD.  */
 463   bfd *output_bfd;
 464   /* Used to indicate failure in traversal routine.  */
 465   bfd_boolean failed;
 466   /* If doing "task linking" set only during the time when we want the
 467      global symbol writer to convert the storage class of defined global
 468      symbols from global to static. */
 469   bfd_boolean global_to_static;
 470   /* Hash table for long symbol names.  */
 471   struct bfd_strtab_hash *strtab;
 472   /* When doing a relocatable link, an array of information kept for
 473      each output section, indexed by the target_index field.  */
 474   struct coff_link_section_info *section_info;
 475   /* Symbol index of last C_FILE symbol (-1 if none).  */
 476   long last_file_index;
 477   /* Contents of last C_FILE symbol.  */
 478   struct internal_syment last_file;
 479   /* Symbol index of first aux entry of last .bf symbol with an empty
 480      endndx field (-1 if none).  */
 481   long last_bf_index;
 482   /* Contents of last_bf_index aux entry.  */
 483   union internal_auxent last_bf;
 484   /* Hash table used to merge debug information.  */
 485   struct coff_debug_merge_hash_table debug_merge;
 486   /* Buffer large enough to hold swapped symbols of any input file.  */
 487   struct internal_syment *internal_syms;
 488   /* Buffer large enough to hold sections of symbols of any input file.  */
 489   asection **sec_ptrs;
 490   /* Buffer large enough to hold output indices of symbols of any
 491      input file.  */
 492   long *sym_indices;
 493   /* Buffer large enough to hold output symbols for any input file.  */
 494   bfd_byte *outsyms;
 495   /* Buffer large enough to hold external line numbers for any input
 496      section.  */
 497   bfd_byte *linenos;
 498   /* Buffer large enough to hold any input section.  */
 499   bfd_byte *contents;
 500   /* Buffer large enough to hold external relocs of any input section.  */
 501   bfd_byte *external_relocs;
 502   /* Buffer large enough to hold swapped relocs of any input section.  */
 503   struct internal_reloc *internal_relocs;
 504 };
 505
 506 /* Most COFF variants have no way to record the alignment of a
 507    section.  This struct is used to set a specific alignment based on
 508    the name of the section.  */
 509
 510 struct coff_section_alignment_entry
 511 {
 512   /* The section name.  */
 513   const char *name;
 514
 515   /* This is either (unsigned int) -1, indicating that the section
 516      name must match exactly, or it is the number of letters which
 517      must match at the start of the name.  */
 518   unsigned int comparison_length;
 519
 520   /* These macros may be used to fill in the first two fields in a
 521      structure initialization.  */
 522 #define COFF_SECTION_NAME_EXACT_MATCH(name) (name), ((unsigned int) -1)
 523 #define COFF_SECTION_NAME_PARTIAL_MATCH(name) (name), (sizeof (name) - 1)
 524
 525   /* Only use this entry if the default section alignment for this
 526      target is at least that much (as a power of two).  If this field
 527      is COFF_ALIGNMENT_FIELD_EMPTY, it should be ignored.  */
 528   unsigned int default_alignment_min;
 529
 530   /* Only use this entry if the default section alignment for this
 531      target is no greater than this (as a power of two).  If this
 532      field is COFF_ALIGNMENT_FIELD_EMPTY, it should be ignored.  */
 533   unsigned int default_alignment_max;
 534
 535 #define COFF_ALIGNMENT_FIELD_EMPTY ((unsigned int) -1)
 536
 537   /* The desired alignment for this section (as a power of two).  */
 538   unsigned int alignment_power;
 539 };
 540
 541 extern struct bfd_hash_entry *_bfd_coff_link_hash_newfunc
 542   (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
 543 extern bfd_boolean _bfd_coff_link_hash_table_init
 544   (struct coff_link_hash_table *, bfd *,
 545    struct bfd_hash_entry *(*) (struct bfd_hash_entry *,
 546                                struct bfd_hash_table *,
 547                                const char *),
 548    unsigned int);
 549 extern struct bfd_link_hash_table *_bfd_coff_link_hash_table_create
 550   (bfd *);
 551 extern const char *_bfd_coff_internal_syment_name
 552   (bfd *, const struct internal_syment *, char *);
 553 extern bfd_boolean _bfd_coff_section_already_linked
 554   (bfd *, asection *, struct bfd_link_info *);
 555 extern bfd_boolean _bfd_coff_link_add_symbols
 556   (bfd *, struct bfd_link_info *);
 557 extern bfd_boolean _bfd_coff_final_link
 558   (bfd *, struct bfd_link_info *);
 559 extern struct internal_reloc *_bfd_coff_read_internal_relocs
 560   (bfd *, asection *, bfd_boolean, bfd_byte *, bfd_boolean,
 561    struct internal_reloc *);
 562 extern bfd_boolean _bfd_coff_generic_relocate_section
 563   (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
 564    struct internal_reloc *, struct internal_syment *, asection **);
 565 extern struct bfd_hash_entry *_bfd_coff_debug_merge_hash_newfunc
 566   (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
 567 extern bfd_boolean _bfd_coff_write_global_sym
 568   (struct bfd_hash_entry *, void *);
 569 extern bfd_boolean _bfd_coff_write_task_globals
 570   (struct coff_link_hash_entry *, void *);
 571 extern bfd_boolean _bfd_coff_link_input_bfd
 572   (struct coff_final_link_info *, bfd *);
 573 extern bfd_boolean _bfd_coff_reloc_link_order
 574   (bfd *, struct coff_final_link_info *, asection *,
 575    struct bfd_link_order *);
 576
 577
 578 #define coff_get_section_contents_in_window \
 579   _bfd_generic_get_section_contents_in_window
 580
 581 /* Functions in xcofflink.c.  */
 582
 583 extern long _bfd_xcoff_get_dynamic_symtab_upper_bound
 584   (bfd *);
 585 extern long _bfd_xcoff_canonicalize_dynamic_symtab
 586   (bfd *, asymbol **);
 587 extern long _bfd_xcoff_get_dynamic_reloc_upper_bound
 588   (bfd *);
 589 extern long _bfd_xcoff_canonicalize_dynamic_reloc
 590   (bfd *, arelent **, asymbol **);
 591 extern struct bfd_link_hash_table *_bfd_xcoff_bfd_link_hash_table_create
 592   (bfd *);
 593 extern void _bfd_xcoff_bfd_link_hash_table_free
 594   (struct bfd_link_hash_table *);
 595 extern bfd_boolean _bfd_xcoff_bfd_link_add_symbols
 596   (bfd *, struct bfd_link_info *);
 597 extern bfd_boolean _bfd_xcoff_bfd_final_link
 598   (bfd *, struct bfd_link_info *);
 599 extern bfd_boolean _bfd_xcoff_define_common_symbol
 600   (bfd *, struct bfd_link_info *, struct bfd_link_hash_entry *);
 601 extern bfd_boolean _bfd_ppc_xcoff_relocate_section
 602   (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
 603    struct internal_reloc *, struct internal_syment *, asection **);
 604
 605 /* Functions in coff-ppc.c.  FIXME: These are called by pe.em in the
 606    linker, and so should start with bfd and be declared in bfd.h.  */
 607
 608 extern bfd_boolean ppc_allocate_toc_section
 609   (struct bfd_link_info *);
 610 extern bfd_boolean ppc_process_before_allocation
 611   (bfd *, struct bfd_link_info *);