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