bfd/libcoff.h

   1 /* DO NOT EDIT!  -*- buffer-read-only: t -*-  This file is automatically
   2    generated from "libcoff-in.h" and "coffcode.h".
   3    Run "make headers" in your build bfd/ to regenerate.  */
   4
   5 /* BFD COFF object file private structure.
   6    Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
   7    2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
   8    Free Software Foundation, Inc.
   9    Written by Cygnus Support.
  10
  11    This file is part of BFD, the Binary File Descriptor library.
  12
  13    This program is free software; you can redistribute it and/or modify
  14    it under the terms of the GNU General Public License as published by
  15    the Free Software Foundation; either version 3 of the License, or
  16    (at your option) any later version.
  17
  18    This program is distributed in the hope that it will be useful,
  19    but WITHOUT ANY WARRANTY; without even the implied warranty of
  20    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21    GNU General Public License for more details.
  22
  23    You should have received a copy of the GNU General Public License
  24    along with this program; if not, write to the Free Software
  25    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  26    MA 02110-1301, USA.  */
  27
  28 #include "bfdlink.h"
  29
  30 /* Object file tdata; access macros.  */
  31
  32 #define coff_data(bfd)                ((bfd)->tdata.coff_obj_data)
  33 #define exec_hdr(bfd)                 (coff_data (bfd)->hdr)
  34 #define obj_pe(bfd)                   (coff_data (bfd)->pe)
  35 #define obj_symbols(bfd)              (coff_data (bfd)->symbols)
  36 #define obj_sym_filepos(bfd)          (coff_data (bfd)->sym_filepos)
  37 #define obj_relocbase(bfd)            (coff_data (bfd)->relocbase)
  38 #define obj_raw_syments(bfd)          (coff_data (bfd)->raw_syments)
  39 #define obj_raw_syment_count(bfd)     (coff_data (bfd)->raw_syment_count)
  40 #define obj_convert(bfd)              (coff_data (bfd)->conversion_table)
  41 #define obj_conv_table_size(bfd)      (coff_data (bfd)->conv_table_size)
  42 #define obj_coff_external_syms(bfd)   (coff_data (bfd)->external_syms)
  43 #define obj_coff_keep_syms(bfd)       (coff_data (bfd)->keep_syms)
  44 #define obj_coff_strings(bfd)         (coff_data (bfd)->strings)
  45 #define obj_coff_keep_strings(bfd)    (coff_data (bfd)->keep_strings)
  46 #define obj_coff_sym_hashes(bfd)      (coff_data (bfd)->sym_hashes)
  47 #define obj_coff_strings_written(bfd) (coff_data (bfd)->strings_written)
  48 #define obj_coff_local_toc_table(bfd) (coff_data (bfd)->local_toc_sym_map)
  49
  50 /* `Tdata' information kept for COFF files.  */
  51
  52 typedef struct coff_tdata
  53 {
  54   struct coff_symbol_struct *symbols;   /* Symtab for input bfd.  */
  55   unsigned int *conversion_table;
  56   int conv_table_size;
  57   file_ptr sym_filepos;
  58
  59   struct coff_ptr_struct *raw_syments;
  60   unsigned long raw_syment_count;
  61
  62   /* These are only valid once writing has begun.  */
  63   long int relocbase;
  64
  65   /* These members communicate important constants about the symbol table
  66      to GDB's symbol-reading code.  These `constants' unfortunately vary
  67      from coff implementation to implementation...  */
  68   unsigned local_n_btmask;
  69   unsigned local_n_btshft;
  70   unsigned local_n_tmask;
  71   unsigned local_n_tshift;
  72   unsigned local_symesz;
  73   unsigned local_auxesz;
  74   unsigned local_linesz;
  75
  76   /* The unswapped external symbols.  May be NULL.  Read by
  77      _bfd_coff_get_external_symbols.  */
  78   void * external_syms;
  79   /* If this is TRUE, the external_syms may not be freed.  */
  80   bfd_boolean keep_syms;
  81
  82   /* The string table.  May be NULL.  Read by
  83      _bfd_coff_read_string_table.  */
  84   char *strings;
  85   /* If this is TRUE, the strings may not be freed.  */
  86   bfd_boolean keep_strings;
  87   /* If this is TRUE, the strings have been written out already.  */
  88   bfd_boolean strings_written;
  89
  90   /* Is this a PE format coff file?  */
  91   int pe;
  92   /* Used by the COFF backend linker.  */
  93   struct coff_link_hash_entry **sym_hashes;
  94
  95   /* Used by the pe linker for PowerPC.  */
  96   int *local_toc_sym_map;
  97
  98   struct bfd_link_info *link_info;
  99
 100   /* Used by coff_find_nearest_line.  */
 101   void * line_info;
 102
 103   /* A place to stash dwarf2 info for this bfd.  */
 104   void * dwarf2_find_line_info;
 105
 106   /* The timestamp from the COFF file header.  */
 107   long timestamp;
 108
 109   /* Copy of some of the f_flags bits in the COFF filehdr structure,
 110      used by ARM code.  */
 111   flagword flags;
 112
 113 } coff_data_type;
 114
 115 /* Tdata for pe image files.  */
 116 typedef struct pe_tdata
 117 {
 118   coff_data_type coff;
 119   struct internal_extra_pe_aouthdr pe_opthdr;
 120   int dll;
 121   int has_reloc_section;
 122   bfd_boolean (*in_reloc_p) (bfd *, reloc_howto_type *);
 123   flagword real_flags;
 124   int target_subsystem;
 125   bfd_boolean force_minimum_alignment;
 126 } pe_data_type;
 127
 128 #define pe_data(bfd)            ((bfd)->tdata.pe_obj_data)
 129
 130 /* Tdata for XCOFF files.  */
 131
 132 struct xcoff_tdata
 133 {
 134   /* Basic COFF information.  */
 135   coff_data_type coff;
 136
 137   /* TRUE if this is an XCOFF64 file. */
 138   bfd_boolean xcoff64;
 139
 140   /* TRUE if a large a.out header should be generated.  */
 141   bfd_boolean full_aouthdr;
 142
 143   /* TOC value.  */
 144   bfd_vma toc;
 145
 146   /* Index of section holding TOC.  */
 147   int sntoc;
 148
 149   /* Index of section holding entry point.  */
 150   int snentry;
 151
 152   /* .text alignment from optional header.  */
 153   int text_align_power;
 154
 155   /* .data alignment from optional header.  */
 156   int data_align_power;
 157
 158   /* modtype from optional header.  */
 159   short modtype;
 160
 161   /* cputype from optional header.  */
 162   short cputype;
 163
 164   /* maxdata from optional header.  */
 165   bfd_vma maxdata;
 166
 167   /* maxstack from optional header.  */
 168   bfd_vma maxstack;
 169
 170   /* Used by the XCOFF backend linker.  */
 171   asection **csects;
 172   long *debug_indices;
 173   unsigned int import_file_id;
 174 };
 175
 176 #define xcoff_data(abfd) ((abfd)->tdata.xcoff_obj_data)
 177
 178 /* We take the address of the first element of an asymbol to ensure that the
 179    macro is only ever applied to an asymbol.  */
 180 #define coffsymbol(asymbol) ((coff_symbol_type *)(&((asymbol)->the_bfd)))
 181
 182 /* The used_by_bfd field of a section may be set to a pointer to this
 183    structure.  */
 184
 185 struct coff_section_tdata
 186 {
 187   /* The relocs, swapped into COFF internal form.  This may be NULL.  */
 188   struct internal_reloc *relocs;
 189   /* If this is TRUE, the relocs entry may not be freed.  */
 190   bfd_boolean keep_relocs;
 191   /* The section contents.  This may be NULL.  */
 192   bfd_byte *contents;
 193   /* If this is TRUE, the contents entry may not be freed.  */
 194   bfd_boolean keep_contents;
 195   /* Information cached by coff_find_nearest_line.  */
 196   bfd_vma offset;
 197   unsigned int i;
 198   const char *function;
 199   /* Optional information about a COMDAT entry; NULL if not COMDAT. */
 200   struct coff_comdat_info *comdat;
 201   int line_base;
 202   /* A pointer used for .stab linking optimizations.  */
 203   void * stab_info;
 204   /* Available for individual backends.  */
 205   void * tdata;
 206 };
 207
 208 /* An accessor macro for the coff_section_tdata structure.  */
 209 #define coff_section_data(abfd, sec) \
 210   ((struct coff_section_tdata *) (sec)->used_by_bfd)
 211
 212 /* Tdata for sections in XCOFF files.  This is used by the linker.  */
 213
 214 struct xcoff_section_tdata
 215 {
 216   /* Used for XCOFF csects created by the linker; points to the real
 217      XCOFF section which contains this csect.  */
 218   asection *enclosing;
 219   /* The lineno_count field for the enclosing section, because we are
 220      going to clobber it there.  */
 221   unsigned int lineno_count;
 222   /* The first and last symbol indices for symbols used by this csect.  */
 223   unsigned long first_symndx;
 224   unsigned long last_symndx;
 225 };
 226
 227 /* An accessor macro the xcoff_section_tdata structure.  */
 228 #define xcoff_section_data(abfd, sec) \
 229   ((struct xcoff_section_tdata *) coff_section_data ((abfd), (sec))->tdata)
 230
 231 /* Tdata for sections in PE files.  */
 232
 233 struct pei_section_tdata
 234 {
 235   /* The virtual size of the section.  */
 236   bfd_size_type virt_size;
 237   /* The PE section flags.  */
 238   long pe_flags;
 239 };
 240
 241 /* An accessor macro for the pei_section_tdata structure.  */
 242 #define pei_section_data(abfd, sec) \
 243   ((struct pei_section_tdata *) coff_section_data ((abfd), (sec))->tdata)
 244
 245 /* COFF linker hash table entries.  */
 246
 247 struct coff_link_hash_entry
 248 {
 249   struct bfd_link_hash_entry root;
 250
 251   /* Symbol index in output file.  Set to -1 initially.  Set to -2 if
 252      there is a reloc against this symbol.  */
 253   long indx;
 254
 255   /* Symbol type.  */
 256   unsigned short type;
 257
 258   /* Symbol class.  */
 259   unsigned char class;
 260
 261   /* Number of auxiliary entries.  */
 262   char numaux;
 263
 264   /* BFD to take auxiliary entries from.  */
 265   bfd *auxbfd;
 266
 267   /* Pointer to array of auxiliary entries, if any.  */
 268   union internal_auxent *aux;
 269
 270   /* Flag word; legal values follow.  */
 271   unsigned short coff_link_hash_flags;
 272   /* Symbol is a PE section symbol.  */
 273 #define COFF_LINK_HASH_PE_SECTION_SYMBOL (01)
 274 };
 275
 276 /* COFF linker hash table.  */
 277
 278 struct coff_link_hash_table
 279 {
 280   struct bfd_link_hash_table root;
 281   /* A pointer to information used to link stabs in sections.  */
 282   struct stab_info stab_info;
 283 };
 284
 285 /* Look up an entry in a COFF linker hash table.  */
 286
 287 #define coff_link_hash_lookup(table, string, create, copy, follow)      \
 288   ((struct coff_link_hash_entry *)                                      \
 289    bfd_link_hash_lookup (&(table)->root, (string), (create),            \
 290                          (copy), (follow)))
 291
 292 /* Traverse a COFF linker hash table.  */
 293
 294 #define coff_link_hash_traverse(table, func, info)                      \
 295   (bfd_link_hash_traverse                                               \
 296    (&(table)->root,                                                     \
 297     (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (func), \
 298     (info)))
 299
 300 /* Get the COFF linker hash table from a link_info structure.  */
 301
 302 #define coff_hash_table(p) ((struct coff_link_hash_table *) ((p)->hash))
 303
 304 /* Functions in coffgen.c.  */
 305 extern const bfd_target *coff_object_p
 306   (bfd *);
 307 extern struct bfd_section *coff_section_from_bfd_index
 308   (bfd *, int);
 309 extern long coff_get_symtab_upper_bound
 310   (bfd *);
 311 extern long coff_canonicalize_symtab
 312   (bfd *, asymbol **);
 313 extern int coff_count_linenumbers
 314   (bfd *);
 315 extern struct coff_symbol_struct *coff_symbol_from
 316   (bfd *, asymbol *);
 317 extern bfd_boolean coff_renumber_symbols
 318   (bfd *, int *);
 319 extern void coff_mangle_symbols
 320   (bfd *);
 321 extern bfd_boolean coff_write_symbols
 322   (bfd *);
 323 extern bfd_boolean coff_write_linenumbers
 324   (bfd *);
 325 extern alent *coff_get_lineno
 326   (bfd *, asymbol *);
 327 extern asymbol *coff_section_symbol
 328   (bfd *, char *);
 329 extern bfd_boolean _bfd_coff_get_external_symbols
 330   (bfd *);
 331 extern const char *_bfd_coff_read_string_table
 332   (bfd *);
 333 extern bfd_boolean _bfd_coff_free_symbols
 334   (bfd *);
 335 extern struct coff_ptr_struct *coff_get_normalized_symtab
 336   (bfd *);
 337 extern long coff_get_reloc_upper_bound
 338   (bfd *, sec_ptr);
 339 extern asymbol *coff_make_empty_symbol
 340   (bfd *);
 341 extern void coff_print_symbol
 342   (bfd *, void * filep, asymbol *, bfd_print_symbol_type);
 343 extern void coff_get_symbol_info
 344   (bfd *, asymbol *, symbol_info *ret);
 345 extern bfd_boolean _bfd_coff_is_local_label_name
 346   (bfd *, const char *);
 347 extern asymbol *coff_bfd_make_debug_symbol
 348   (bfd *, void *, unsigned long);
 349 extern bfd_boolean coff_find_nearest_line
 350   (bfd *, asection *, asymbol **, bfd_vma, const char **,
 351    const char **, unsigned int *);
 352 extern bfd_boolean coff_find_inliner_info
 353   (bfd *, const char **, const char **, unsigned int *);
 354 extern int coff_sizeof_headers
 355   (bfd *, struct bfd_link_info *);
 356 extern bfd_boolean bfd_coff_reloc16_relax_section
 357   (bfd *, asection *, struct bfd_link_info *, bfd_boolean *);
 358 extern bfd_byte *bfd_coff_reloc16_get_relocated_section_contents
 359   (bfd *, struct bfd_link_info *, struct bfd_link_order *,
 360    bfd_byte *, bfd_boolean, asymbol **);
 361 extern bfd_vma bfd_coff_reloc16_get_value
 362   (arelent *, struct bfd_link_info *, asection *);
 363 extern void bfd_perform_slip
 364   (bfd *, unsigned int, asection *, bfd_vma);
 365
 366 /* Functions and types in cofflink.c.  */
 367
 368 #define STRING_SIZE_SIZE 4
 369
 370 /* We use a hash table to merge identical enum, struct, and union
 371    definitions in the linker.  */
 372
 373 /* Information we keep for a single element (an enum value, a
 374    structure or union field) in the debug merge hash table.  */
 375
 376 struct coff_debug_merge_element
 377 {
 378   /* Next element.  */
 379   struct coff_debug_merge_element *next;
 380
 381   /* Name.  */
 382   const char *name;
 383
 384   /* Type.  */
 385   unsigned int type;
 386
 387   /* Symbol index for complex type.  */
 388   long tagndx;
 389 };
 390
 391 /* A linked list of debug merge entries for a given name.  */
 392
 393 struct coff_debug_merge_type
 394 {
 395   /* Next type with the same name.  */
 396   struct coff_debug_merge_type *next;
 397
 398   /* Class of type.  */
 399   int class;
 400
 401   /* Symbol index where this type is defined.  */
 402   long indx;
 403
 404   /* List of elements.  */
 405   struct coff_debug_merge_element *elements;
 406 };
 407
 408 /* Information we store in the debug merge hash table.  */
 409
 410 struct coff_debug_merge_hash_entry
 411 {
 412   struct bfd_hash_entry root;
 413
 414   /* A list of types with this name.  */
 415   struct coff_debug_merge_type *types;
 416 };
 417
 418 /* The debug merge hash table.  */
 419
 420 struct coff_debug_merge_hash_table
 421 {
 422   struct bfd_hash_table root;
 423 };
 424
 425 /* Initialize a COFF debug merge hash table.  */
 426
 427 #define coff_debug_merge_hash_table_init(table) \
 428   (bfd_hash_table_init (&(table)->root, _bfd_coff_debug_merge_hash_newfunc, \
 429                         sizeof (struct coff_debug_merge_hash_entry)))
 430
 431 /* Free a COFF debug merge hash table.  */
 432
 433 #define coff_debug_merge_hash_table_free(table) \
 434   (bfd_hash_table_free (&(table)->root))
 435
 436 /* Look up an entry in a COFF debug merge hash table.  */
 437
 438 #define coff_debug_merge_hash_lookup(table, string, create, copy) \
 439   ((struct coff_debug_merge_hash_entry *) \
 440    bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
 441
 442 /* Information we keep for each section in the output file when doing
 443    a relocatable link.  */
 444
 445 struct coff_link_section_info
 446 {
 447   /* The relocs to be output.  */
 448   struct internal_reloc *relocs;
 449   /* For each reloc against a global symbol whose index was not known
 450      when the reloc was handled, the global hash table entry.  */
 451   struct coff_link_hash_entry **rel_hashes;
 452 };
 453
 454 /* Information that we pass around while doing the final link step.  */
 455
 456 struct coff_final_link_info
 457 {
 458   /* General link information.  */
 459   struct bfd_link_info *info;
 460   /* Output BFD.  */
 461   bfd *output_bfd;
 462   /* Used to indicate failure in traversal routine.  */
 463   bfd_boolean failed;
 464   /* If doing "task linking" set only during the time when we want the
 465      global symbol writer to convert the storage class of defined global
 466      symbols from global to static. */
 467   bfd_boolean global_to_static;
 468   /* Hash table for long symbol names.  */
 469   struct bfd_strtab_hash *strtab;
 470   /* When doing a relocatable link, an array of information kept for
 471      each output section, indexed by the target_index field.  */
 472   struct coff_link_section_info *section_info;
 473   /* Symbol index of last C_FILE symbol (-1 if none).  */
 474   long last_file_index;
 475   /* Contents of last C_FILE symbol.  */
 476   struct internal_syment last_file;
 477   /* Symbol index of first aux entry of last .bf symbol with an empty
 478      endndx field (-1 if none).  */
 479   long last_bf_index;
 480   /* Contents of last_bf_index aux entry.  */
 481   union internal_auxent last_bf;
 482   /* Hash table used to merge debug information.  */
 483   struct coff_debug_merge_hash_table debug_merge;
 484   /* Buffer large enough to hold swapped symbols of any input file.  */
 485   struct internal_syment *internal_syms;
 486   /* Buffer large enough to hold sections of symbols of any input file.  */
 487   asection **sec_ptrs;
 488   /* Buffer large enough to hold output indices of symbols of any
 489      input file.  */
 490   long *sym_indices;
 491   /* Buffer large enough to hold output symbols for any input file.  */
 492   bfd_byte *outsyms;
 493   /* Buffer large enough to hold external line numbers for any input
 494      section.  */
 495   bfd_byte *linenos;
 496   /* Buffer large enough to hold any input section.  */
 497   bfd_byte *contents;
 498   /* Buffer large enough to hold external relocs of any input section.  */
 499   bfd_byte *external_relocs;
 500   /* Buffer large enough to hold swapped relocs of any input section.  */
 501   struct internal_reloc *internal_relocs;
 502 };
 503
 504 /* Most COFF variants have no way to record the alignment of a
 505    section.  This struct is used to set a specific alignment based on
 506    the name of the section.  */
 507
 508 struct coff_section_alignment_entry
 509 {
 510   /* The section name.  */
 511   const char *name;
 512
 513   /* This is either (unsigned int) -1, indicating that the section
 514      name must match exactly, or it is the number of letters which
 515      must match at the start of the name.  */
 516   unsigned int comparison_length;
 517
 518   /* These macros may be used to fill in the first two fields in a
 519      structure initialization.  */
 520 #define COFF_SECTION_NAME_EXACT_MATCH(name) (name), ((unsigned int) -1)
 521 #define COFF_SECTION_NAME_PARTIAL_MATCH(name) (name), (sizeof (name) - 1)
 522
 523   /* Only use this entry if the default section alignment for this
 524      target is at least that much (as a power of two).  If this field
 525      is COFF_ALIGNMENT_FIELD_EMPTY, it should be ignored.  */
 526   unsigned int default_alignment_min;
 527
 528   /* Only use this entry if the default section alignment for this
 529      target is no greater than this (as a power of two).  If this
 530      field is COFF_ALIGNMENT_FIELD_EMPTY, it should be ignored.  */
 531   unsigned int default_alignment_max;
 532
 533 #define COFF_ALIGNMENT_FIELD_EMPTY ((unsigned int) -1)
 534
 535   /* The desired alignment for this section (as a power of two).  */
 536   unsigned int alignment_power;
 537 };
 538
 539 extern struct bfd_hash_entry *_bfd_coff_link_hash_newfunc
 540   (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
 541 extern bfd_boolean _bfd_coff_link_hash_table_init
 542   (struct coff_link_hash_table *, bfd *,
 543    struct bfd_hash_entry *(*) (struct bfd_hash_entry *,
 544                                struct bfd_hash_table *,
 545                                const char *),
 546    unsigned int);
 547 extern struct bfd_link_hash_table *_bfd_coff_link_hash_table_create
 548   (bfd *);
 549 extern const char *_bfd_coff_internal_syment_name
 550   (bfd *, const struct internal_syment *, char *);
 551 extern bfd_boolean _bfd_coff_link_add_symbols
 552   (bfd *, struct bfd_link_info *);
 553 extern bfd_boolean _bfd_coff_final_link
 554   (bfd *, struct bfd_link_info *);
 555 extern struct internal_reloc *_bfd_coff_read_internal_relocs
 556   (bfd *, asection *, bfd_boolean, bfd_byte *, bfd_boolean,
 557    struct internal_reloc *);
 558 extern bfd_boolean _bfd_coff_generic_relocate_section
 559   (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
 560    struct internal_reloc *, struct internal_syment *, asection **);
 561 extern struct bfd_hash_entry *_bfd_coff_debug_merge_hash_newfunc
 562   (struct bfd_hash_entry *, struct bfd_hash_table *, const char *);
 563 extern bfd_boolean _bfd_coff_write_global_sym
 564   (struct coff_link_hash_entry *, void *);
 565 extern bfd_boolean _bfd_coff_write_task_globals
 566   (struct coff_link_hash_entry *, void *);
 567 extern bfd_boolean _bfd_coff_link_input_bfd
 568   (struct coff_final_link_info *, bfd *);
 569 extern bfd_boolean _bfd_coff_reloc_link_order
 570   (bfd *, struct coff_final_link_info *, asection *,
 571    struct bfd_link_order *);
 572
 573
 574 #define coff_get_section_contents_in_window \
 575   _bfd_generic_get_section_contents_in_window
 576
 577 /* Functions in xcofflink.c.  */
 578
 579 extern long _bfd_xcoff_get_dynamic_symtab_upper_bound
 580   (bfd *);
 581 extern long _bfd_xcoff_canonicalize_dynamic_symtab
 582   (bfd *, asymbol **);
 583 extern long _bfd_xcoff_get_dynamic_reloc_upper_bound
 584   (bfd *);
 585 extern long _bfd_xcoff_canonicalize_dynamic_reloc
 586   (bfd *, arelent **, asymbol **);
 587 extern struct bfd_link_hash_table *_bfd_xcoff_bfd_link_hash_table_create
 588   (bfd *);
 589 extern void _bfd_xcoff_bfd_link_hash_table_free
 590   (struct bfd_link_hash_table *);
 591 extern bfd_boolean _bfd_xcoff_bfd_link_add_symbols
 592   (bfd *, struct bfd_link_info *);
 593 extern bfd_boolean _bfd_xcoff_bfd_final_link
 594   (bfd *, struct bfd_link_info *);
 595 extern bfd_boolean _bfd_ppc_xcoff_relocate_section
 596   (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
 597    struct internal_reloc *, struct internal_syment *, asection **);
 598
 599 /* Functions in coff-ppc.c.  FIXME: These are called by pe.em in the
 600    linker, and so should start with bfd and be declared in bfd.h.  */
 601
 602 extern bfd_boolean ppc_allocate_toc_section
 603   (struct bfd_link_info *);
 604 extern bfd_boolean ppc_process_before_allocation
 605   (bfd *, struct bfd_link_info *);
 606
 607 /* Extracted from coffcode.h.  */
 608 typedef struct coff_ptr_struct
 609 {
 610   /* Remembers the offset from the first symbol in the file for
 611      this symbol. Generated by coff_renumber_symbols. */
 612   unsigned int offset;
 613
 614   /* Should the value of this symbol be renumbered.  Used for
 615      XCOFF C_BSTAT symbols.  Set by coff_slurp_symbol_table.  */
 616   unsigned int fix_value : 1;
 617
 618   /* Should the tag field of this symbol be renumbered.
 619      Created by coff_pointerize_aux. */
 620   unsigned int fix_tag : 1;
 621
 622   /* Should the endidx field of this symbol be renumbered.
 623      Created by coff_pointerize_aux. */
 624   unsigned int fix_end : 1;
 625
 626   /* Should the x_csect.x_scnlen field be renumbered.
 627      Created by coff_pointerize_aux. */
 628   unsigned int fix_scnlen : 1;
 629
 630   /* Fix up an XCOFF C_BINCL/C_EINCL symbol.  The value is the
 631      index into the line number entries.  Set by coff_slurp_symbol_table.  */
 632   unsigned int fix_line : 1;
 633
 634   /* The container for the symbol structure as read and translated
 635      from the file. */
 636   union
 637   {
 638     union internal_auxent auxent;
 639     struct internal_syment syment;
 640   } u;
 641 } combined_entry_type;
 642
 643
 644 /* Each canonical asymbol really looks like this: */
 645
 646 typedef struct coff_symbol_struct
 647 {
 648   /* The actual symbol which the rest of BFD works with */
 649   asymbol symbol;
 650
 651   /* A pointer to the hidden information for this symbol */
 652   combined_entry_type *native;
 653
 654   /* A pointer to the linenumber information for this symbol */
 655   struct lineno_cache_entry *lineno;
 656
 657   /* Have the line numbers been relocated yet ? */
 658   bfd_boolean done_lineno;
 659 } coff_symbol_type;
 660 /* COFF symbol classifications.  */
 661
 662 enum coff_symbol_classification
 663 {
 664   /* Global symbol.  */
 665   COFF_SYMBOL_GLOBAL,
 666   /* Common symbol.  */
 667   COFF_SYMBOL_COMMON,
 668   /* Undefined symbol.  */
 669   COFF_SYMBOL_UNDEFINED,
 670   /* Local symbol.  */
 671   COFF_SYMBOL_LOCAL,
 672   /* PE section symbol.  */
 673   COFF_SYMBOL_PE_SECTION
 674 };
 675
 676 typedef struct
 677 {
 678   void (*_bfd_coff_swap_aux_in)
 679     (bfd *, void *, int, int, int, int, void *);
 680
 681   void (*_bfd_coff_swap_sym_in)
 682     (bfd *, void *, void *);
 683
 684   void (*_bfd_coff_swap_lineno_in)
 685     (bfd *, void *, void *);
 686
 687   unsigned int (*_bfd_coff_swap_aux_out)
 688     (bfd *, void *, int, int, int, int, void *);
 689
 690   unsigned int (*_bfd_coff_swap_sym_out)
 691     (bfd *, void *, void *);
 692
 693   unsigned int (*_bfd_coff_swap_lineno_out)
 694     (bfd *, void *, void *);
 695
 696   unsigned int (*_bfd_coff_swap_reloc_out)
 697     (bfd *, void *, void *);
 698
 699   unsigned int (*_bfd_coff_swap_filehdr_out)
 700     (bfd *, void *, void *);
 701
 702   unsigned int (*_bfd_coff_swap_aouthdr_out)
 703     (bfd *, void *, void *);
 704
 705   unsigned int (*_bfd_coff_swap_scnhdr_out)
 706     (bfd *, void *, void *);
 707
 708   unsigned int _bfd_filhsz;
 709   unsigned int _bfd_aoutsz;
 710   unsigned int _bfd_scnhsz;
 711   unsigned int _bfd_symesz;
 712   unsigned int _bfd_auxesz;
 713   unsigned int _bfd_relsz;
 714   unsigned int _bfd_linesz;
 715   unsigned int _bfd_filnmlen;
 716   bfd_boolean _bfd_coff_long_filenames;
 717
 718   bfd_boolean _bfd_coff_long_section_names;
 719   bfd_boolean (*_bfd_coff_set_long_section_names)
 720     (bfd *, int);
 721
 722   unsigned int _bfd_coff_default_section_alignment_power;
 723   bfd_boolean _bfd_coff_force_symnames_in_strings;
 724   unsigned int _bfd_coff_debug_string_prefix_length;
 725
 726   void (*_bfd_coff_swap_filehdr_in)
 727     (bfd *, void *, void *);
 728
 729   void (*_bfd_coff_swap_aouthdr_in)
 730     (bfd *, void *, void *);
 731
 732   void (*_bfd_coff_swap_scnhdr_in)
 733     (bfd *, void *, void *);
 734
 735   void (*_bfd_coff_swap_reloc_in)
 736     (bfd *abfd, void *, void *);
 737
 738   bfd_boolean (*_bfd_coff_bad_format_hook)
 739     (bfd *, void *);
 740
 741   bfd_boolean (*_bfd_coff_set_arch_mach_hook)
 742     (bfd *, void *);
 743
 744   void * (*_bfd_coff_mkobject_hook)
 745     (bfd *, void *, void *);
 746
 747   bfd_boolean (*_bfd_styp_to_sec_flags_hook)
 748     (bfd *, void *, const char *, asection *, flagword *);
 749
 750   void (*_bfd_set_alignment_hook)
 751     (bfd *, asection *, void *);
 752
 753   bfd_boolean (*_bfd_coff_slurp_symbol_table)
 754     (bfd *);
 755
 756   bfd_boolean (*_bfd_coff_symname_in_debug)
 757     (bfd *, struct internal_syment *);
 758
 759   bfd_boolean (*_bfd_coff_pointerize_aux_hook)
 760     (bfd *, combined_entry_type *, combined_entry_type *,
 761             unsigned int, combined_entry_type *);
 762
 763   bfd_boolean (*_bfd_coff_print_aux)
 764     (bfd *, FILE *, combined_entry_type *, combined_entry_type *,
 765             combined_entry_type *, unsigned int);
 766
 767   void (*_bfd_coff_reloc16_extra_cases)
 768     (bfd *, struct bfd_link_info *, struct bfd_link_order *, arelent *,
 769            bfd_byte *, unsigned int *, unsigned int *);
 770
 771   int (*_bfd_coff_reloc16_estimate)
 772     (bfd *, asection *, arelent *, unsigned int,
 773             struct bfd_link_info *);
 774
 775   enum coff_symbol_classification (*_bfd_coff_classify_symbol)
 776     (bfd *, struct internal_syment *);
 777
 778   bfd_boolean (*_bfd_coff_compute_section_file_positions)
 779     (bfd *);
 780
 781   bfd_boolean (*_bfd_coff_start_final_link)
 782     (bfd *, struct bfd_link_info *);
 783
 784   bfd_boolean (*_bfd_coff_relocate_section)
 785     (bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
 786             struct internal_reloc *, struct internal_syment *, asection **);
 787
 788   reloc_howto_type *(*_bfd_coff_rtype_to_howto)
 789     (bfd *, asection *, struct internal_reloc *,
 790             struct coff_link_hash_entry *, struct internal_syment *,
 791             bfd_vma *);
 792
 793   bfd_boolean (*_bfd_coff_adjust_symndx)
 794     (bfd *, struct bfd_link_info *, bfd *, asection *,
 795             struct internal_reloc *, bfd_boolean *);
 796
 797   bfd_boolean (*_bfd_coff_link_add_one_symbol)
 798     (struct bfd_link_info *, bfd *, const char *, flagword,
 799             asection *, bfd_vma, const char *, bfd_boolean, bfd_boolean,
 800             struct bfd_link_hash_entry **);
 801
 802   bfd_boolean (*_bfd_coff_link_output_has_begun)
 803     (bfd *, struct coff_final_link_info *);
 804
 805   bfd_boolean (*_bfd_coff_final_link_postscript)
 806     (bfd *, struct coff_final_link_info *);
 807
 808   bfd_boolean (*_bfd_coff_print_pdata)
 809     (bfd *, void *);
 810
 811 } bfd_coff_backend_data;
 812
 813 #define coff_backend_info(abfd) \
 814   ((bfd_coff_backend_data *) (abfd)->xvec->backend_data)
 815
 816 #define bfd_coff_swap_aux_in(a,e,t,c,ind,num,i) \
 817   ((coff_backend_info (a)->_bfd_coff_swap_aux_in) (a,e,t,c,ind,num,i))
 818
 819 #define bfd_coff_swap_sym_in(a,e,i) \
 820   ((coff_backend_info (a)->_bfd_coff_swap_sym_in) (a,e,i))
 821
 822 #define bfd_coff_swap_lineno_in(a,e,i) \
 823   ((coff_backend_info ( a)->_bfd_coff_swap_lineno_in) (a,e,i))
 824
 825 #define bfd_coff_swap_reloc_out(abfd, i, o) \
 826   ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_out) (abfd, i, o))
 827
 828 #define bfd_coff_swap_lineno_out(abfd, i, o) \
 829   ((coff_backend_info (abfd)->_bfd_coff_swap_lineno_out) (abfd, i, o))
 830
 831 #define bfd_coff_swap_aux_out(a,i,t,c,ind,num,o) \
 832   ((coff_backend_info (a)->_bfd_coff_swap_aux_out) (a,i,t,c,ind,num,o))
 833
 834 #define bfd_coff_swap_sym_out(abfd, i,o) \
 835   ((coff_backend_info (abfd)->_bfd_coff_swap_sym_out) (abfd, i, o))
 836
 837 #define bfd_coff_swap_scnhdr_out(abfd, i,o) \
 838   ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_out) (abfd, i, o))
 839
 840 #define bfd_coff_swap_filehdr_out(abfd, i,o) \
 841   ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_out) (abfd, i, o))
 842
 843 #define bfd_coff_swap_aouthdr_out(abfd, i,o) \
 844   ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_out) (abfd, i, o))
 845
 846 #define bfd_coff_filhsz(abfd) (coff_backend_info (abfd)->_bfd_filhsz)
 847 #define bfd_coff_aoutsz(abfd) (coff_backend_info (abfd)->_bfd_aoutsz)
 848 #define bfd_coff_scnhsz(abfd) (coff_backend_info (abfd)->_bfd_scnhsz)
 849 #define bfd_coff_symesz(abfd) (coff_backend_info (abfd)->_bfd_symesz)
 850 #define bfd_coff_auxesz(abfd) (coff_backend_info (abfd)->_bfd_auxesz)
 851 #define bfd_coff_relsz(abfd)  (coff_backend_info (abfd)->_bfd_relsz)
 852 #define bfd_coff_linesz(abfd) (coff_backend_info (abfd)->_bfd_linesz)
 853 #define bfd_coff_filnmlen(abfd) (coff_backend_info (abfd)->_bfd_filnmlen)
 854 #define bfd_coff_long_filenames(abfd) \
 855   (coff_backend_info (abfd)->_bfd_coff_long_filenames)
 856 #define bfd_coff_long_section_names(abfd) \
 857   (coff_backend_info (abfd)->_bfd_coff_long_section_names)
 858 #define bfd_coff_set_long_section_names(abfd, enable) \
 859   ((coff_backend_info (abfd)->_bfd_coff_set_long_section_names) (abfd, enable))
 860 #define bfd_coff_default_section_alignment_power(abfd) \
 861   (coff_backend_info (abfd)->_bfd_coff_default_section_alignment_power)
 862 #define bfd_coff_swap_filehdr_in(abfd, i,o) \
 863   ((coff_backend_info (abfd)->_bfd_coff_swap_filehdr_in) (abfd, i, o))
 864
 865 #define bfd_coff_swap_aouthdr_in(abfd, i,o) \
 866   ((coff_backend_info (abfd)->_bfd_coff_swap_aouthdr_in) (abfd, i, o))
 867
 868 #define bfd_coff_swap_scnhdr_in(abfd, i,o) \
 869   ((coff_backend_info (abfd)->_bfd_coff_swap_scnhdr_in) (abfd, i, o))
 870
 871 #define bfd_coff_swap_reloc_in(abfd, i, o) \
 872   ((coff_backend_info (abfd)->_bfd_coff_swap_reloc_in) (abfd, i, o))
 873
 874 #define bfd_coff_bad_format_hook(abfd, filehdr) \
 875   ((coff_backend_info (abfd)->_bfd_coff_bad_format_hook) (abfd, filehdr))
 876
 877 #define bfd_coff_set_arch_mach_hook(abfd, filehdr)\
 878   ((coff_backend_info (abfd)->_bfd_coff_set_arch_mach_hook) (abfd, filehdr))
 879 #define bfd_coff_mkobject_hook(abfd, filehdr, aouthdr)\
 880   ((coff_backend_info (abfd)->_bfd_coff_mkobject_hook)\
 881    (abfd, filehdr, aouthdr))
 882
 883 #define bfd_coff_styp_to_sec_flags_hook(abfd, scnhdr, name, section, flags_ptr)\
 884   ((coff_backend_info (abfd)->_bfd_styp_to_sec_flags_hook)\
 885    (abfd, scnhdr, name, section, flags_ptr))
 886
 887 #define bfd_coff_set_alignment_hook(abfd, sec, scnhdr)\
 888   ((coff_backend_info (abfd)->_bfd_set_alignment_hook) (abfd, sec, scnhdr))
 889
 890 #define bfd_coff_slurp_symbol_table(abfd)\
 891   ((coff_backend_info (abfd)->_bfd_coff_slurp_symbol_table) (abfd))
 892
 893 #define bfd_coff_symname_in_debug(abfd, sym)\
 894   ((coff_backend_info (abfd)->_bfd_coff_symname_in_debug) (abfd, sym))
 895
 896 #define bfd_coff_force_symnames_in_strings(abfd)\
 897   (coff_backend_info (abfd)->_bfd_coff_force_symnames_in_strings)
 898
 899 #define bfd_coff_debug_string_prefix_length(abfd)\
 900   (coff_backend_info (abfd)->_bfd_coff_debug_string_prefix_length)
 901
 902 #define bfd_coff_print_aux(abfd, file, base, symbol, aux, indaux)\
 903   ((coff_backend_info (abfd)->_bfd_coff_print_aux)\
 904    (abfd, file, base, symbol, aux, indaux))
 905
 906 #define bfd_coff_reloc16_extra_cases(abfd, link_info, link_order,\
 907                                      reloc, data, src_ptr, dst_ptr)\
 908   ((coff_backend_info (abfd)->_bfd_coff_reloc16_extra_cases)\
 909    (abfd, link_info, link_order, reloc, data, src_ptr, dst_ptr))
 910
 911 #define bfd_coff_reloc16_estimate(abfd, section, reloc, shrink, link_info)\
 912   ((coff_backend_info (abfd)->_bfd_coff_reloc16_estimate)\
 913    (abfd, section, reloc, shrink, link_info))
 914
 915 #define bfd_coff_classify_symbol(abfd, sym)\
 916   ((coff_backend_info (abfd)->_bfd_coff_classify_symbol)\
 917    (abfd, sym))
 918
 919 #define bfd_coff_compute_section_file_positions(abfd)\
 920   ((coff_backend_info (abfd)->_bfd_coff_compute_section_file_positions)\
 921    (abfd))
 922
 923 #define bfd_coff_start_final_link(obfd, info)\
 924   ((coff_backend_info (obfd)->_bfd_coff_start_final_link)\
 925    (obfd, info))
 926 #define bfd_coff_relocate_section(obfd,info,ibfd,o,con,rel,isyms,secs)\
 927   ((coff_backend_info (ibfd)->_bfd_coff_relocate_section)\
 928    (obfd, info, ibfd, o, con, rel, isyms, secs))
 929 #define bfd_coff_rtype_to_howto(abfd, sec, rel, h, sym, addendp)\
 930   ((coff_backend_info (abfd)->_bfd_coff_rtype_to_howto)\
 931    (abfd, sec, rel, h, sym, addendp))
 932 #define bfd_coff_adjust_symndx(obfd, info, ibfd, sec, rel, adjustedp)\
 933   ((coff_backend_info (abfd)->_bfd_coff_adjust_symndx)\
 934    (obfd, info, ibfd, sec, rel, adjustedp))
 935 #define bfd_coff_link_add_one_symbol(info, abfd, name, flags, section,\
 936                                      value, string, cp, coll, hashp)\
 937   ((coff_backend_info (abfd)->_bfd_coff_link_add_one_symbol)\
 938    (info, abfd, name, flags, section, value, string, cp, coll, hashp))
 939
 940 #define bfd_coff_link_output_has_begun(a,p) \
 941   ((coff_backend_info (a)->_bfd_coff_link_output_has_begun) (a, p))
 942 #define bfd_coff_final_link_postscript(a,p) \
 943   ((coff_backend_info (a)->_bfd_coff_final_link_postscript) (a, p))
 944
 945 #define bfd_coff_have_print_pdata(a) \
 946   (coff_backend_info (a)->_bfd_coff_print_pdata)
 947 #define bfd_coff_print_pdata(a,p) \
 948   ((coff_backend_info (a)->_bfd_coff_print_pdata) (a, p))
 949