Support for xcoff64
[deliverable/binutils-gdb.git] / 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
4 Free Software Foundation, Inc.
5 Written by Cygnus Support.
6
7 ** NOTE: libcoff.h is a GENERATED file. Don't change it; instead,
8 ** change libcoff-in.h or coffcode.h.
9
10 This file is part of BFD, the Binary File Descriptor library.
11
12 This program is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 2 of the License, or
15 (at your option) any later version.
16
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
21
22 You should have received a copy of the GNU General Public License
23 along with this program; if not, write to the Free Software
24 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
25
26 #include "bfdlink.h"
27
28 /* Object file tdata; access macros */
29
30 #define coff_data(bfd) ((bfd)->tdata.coff_obj_data)
31 #define exec_hdr(bfd) (coff_data(bfd)->hdr)
32 #define obj_pe(bfd) (coff_data(bfd)->pe)
33 #define obj_symbols(bfd) (coff_data(bfd)->symbols)
34 #define obj_sym_filepos(bfd) (coff_data(bfd)->sym_filepos)
35
36 #define obj_relocbase(bfd) (coff_data(bfd)->relocbase)
37 #define obj_raw_syments(bfd) (coff_data(bfd)->raw_syments)
38 #define obj_raw_syment_count(bfd) (coff_data(bfd)->raw_syment_count)
39 #define obj_convert(bfd) (coff_data(bfd)->conversion_table)
40 #define obj_conv_table_size(bfd) (coff_data(bfd)->conv_table_size)
41
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
49 #define obj_coff_local_toc_table(bfd) (coff_data(bfd)->local_toc_sym_map)
50
51 /* `Tdata' information kept for COFF files. */
52
53 typedef struct coff_tdata
54 {
55 struct coff_symbol_struct *symbols; /* symtab for input bfd */
56 unsigned int *conversion_table;
57 int conv_table_size;
58 file_ptr sym_filepos;
59
60 struct coff_ptr_struct *raw_syments;
61 unsigned long raw_syment_count;
62
63 /* These are only valid once writing has begun */
64 long int relocbase;
65
66 /* These members communicate important constants about the symbol table
67 to GDB's symbol-reading code. These `constants' unfortunately vary
68 from coff implementation to implementation... */
69 unsigned local_n_btmask;
70 unsigned local_n_btshft;
71 unsigned local_n_tmask;
72 unsigned local_n_tshift;
73 unsigned local_symesz;
74 unsigned local_auxesz;
75 unsigned local_linesz;
76
77 /* The unswapped external symbols. May be NULL. Read by
78 _bfd_coff_get_external_symbols. */
79 PTR external_syms;
80 /* If this is true, the external_syms may not be freed. */
81 boolean keep_syms;
82
83 /* The string table. May be NULL. Read by
84 _bfd_coff_read_string_table. */
85 char *strings;
86 /* If this is true, the strings may not be freed. */
87 boolean keep_strings;
88 /* If this is true, the strings have been written out already. */
89 boolean strings_written;
90
91 /* is this a PE format coff file */
92 int pe;
93 /* Used by the COFF backend linker. */
94 struct coff_link_hash_entry **sym_hashes;
95
96 /* used by the pe linker for PowerPC */
97 int *local_toc_sym_map;
98
99 struct bfd_link_info *link_info;
100
101 /* Used by coff_find_nearest_line. */
102 PTR line_info;
103
104 /* A place to stash dwarf2 info for this bfd. */
105 PTR dwarf2_find_line_info;
106
107 /* The timestamp from the COFF file header. */
108 long timestamp;
109
110 /* Copy of some of the f_flags bits in the COFF filehdr structure,
111 used by ARM code. */
112 flagword flags;
113
114 } coff_data_type;
115
116 /* Tdata for pe image files. */
117 typedef struct pe_tdata
118 {
119 coff_data_type coff;
120 struct internal_extra_pe_aouthdr pe_opthdr;
121 int dll;
122 int has_reloc_section;
123 boolean (*in_reloc_p) PARAMS((bfd *, reloc_howto_type *));
124 flagword real_flags;
125 int target_subsystem;
126 boolean force_minimum_alignment;
127 } pe_data_type;
128
129 #define pe_data(bfd) ((bfd)->tdata.pe_obj_data)
130
131 /* Tdata for XCOFF files. */
132
133 struct xcoff_tdata
134 {
135 /* Basic COFF information. */
136 coff_data_type coff;
137
138 /* True if this is an XCOFF64 file. */
139 boolean xcoff64;
140
141 /* True if a large a.out header should be generated. */
142 boolean full_aouthdr;
143
144 /* TOC value. */
145 bfd_vma toc;
146
147 /* Index of section holding TOC. */
148 int sntoc;
149
150 /* Index of section holding entry point. */
151 int snentry;
152
153 /* .text alignment from optional header. */
154 int text_align_power;
155
156 /* .data alignment from optional header. */
157 int data_align_power;
158
159 /* modtype from optional header. */
160 short modtype;
161
162 /* cputype from optional header. */
163 short cputype;
164
165 /* maxdata from optional header. */
166 bfd_vma maxdata;
167
168 /* maxstack from optional header. */
169 bfd_vma maxstack;
170
171 /* Used by the XCOFF backend linker. */
172 asection **csects;
173 unsigned long *debug_indices;
174 unsigned int import_file_id;
175 };
176
177 #define xcoff_data(abfd) ((abfd)->tdata.xcoff_obj_data)
178
179 /* We take the address of the first element of a asymbol to ensure that the
180 * macro is only ever applied to an asymbol. */
181 #define coffsymbol(asymbol) ((coff_symbol_type *)(&((asymbol)->the_bfd)))
182
183 /* The used_by_bfd field of a section may be set to a pointer to this
184 structure. */
185
186 struct coff_section_tdata
187 {
188 /* The relocs, swapped into COFF internal form. This may be NULL. */
189 struct internal_reloc *relocs;
190 /* If this is true, the relocs entry may not be freed. */
191 boolean keep_relocs;
192 /* The section contents. This may be NULL. */
193 bfd_byte *contents;
194 /* If this is true, the contents entry may not be freed. */
195 boolean keep_contents;
196 /* Information cached by coff_find_nearest_line. */
197 bfd_vma offset;
198 unsigned int i;
199 const char *function;
200 int line_base;
201 /* A pointer used for .stab linking optimizations. */
202 PTR stab_info;
203 /* Available for individual backends. */
204 PTR tdata;
205 };
206
207 /* An accessor macro for the coff_section_tdata structure. */
208 #define coff_section_data(abfd, sec) \
209 ((struct coff_section_tdata *) (sec)->used_by_bfd)
210
211 /* Tdata for sections in XCOFF files. This is used by the linker. */
212
213 struct xcoff_section_tdata
214 {
215 /* Used for XCOFF csects created by the linker; points to the real
216 XCOFF section which contains this csect. */
217 asection *enclosing;
218 /* The lineno_count field for the enclosing section, because we are
219 going to clobber it there. */
220 unsigned int lineno_count;
221 /* The first and one past the last symbol indices for symbols used
222 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 PTR 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 (boolean (*) PARAMS ((struct bfd_link_hash_entry *, PTR))) (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 PARAMS ((bfd *));
306 extern struct sec *coff_section_from_bfd_index PARAMS ((bfd *, int));
307 extern long coff_get_symtab_upper_bound PARAMS ((bfd *));
308 extern long coff_get_symtab PARAMS ((bfd *, asymbol **));
309 extern int coff_count_linenumbers PARAMS ((bfd *));
310 extern struct coff_symbol_struct *coff_symbol_from PARAMS ((bfd *, asymbol *));
311 extern boolean coff_renumber_symbols PARAMS ((bfd *, int *));
312 extern void coff_mangle_symbols PARAMS ((bfd *));
313 extern boolean coff_write_symbols PARAMS ((bfd *));
314 extern boolean coff_write_linenumbers PARAMS ((bfd *));
315 extern alent *coff_get_lineno PARAMS ((bfd *, asymbol *));
316 extern asymbol *coff_section_symbol PARAMS ((bfd *, char *));
317 extern boolean _bfd_coff_get_external_symbols PARAMS ((bfd *));
318 extern const char *_bfd_coff_read_string_table PARAMS ((bfd *));
319 extern boolean _bfd_coff_free_symbols PARAMS ((bfd *));
320 extern struct coff_ptr_struct *coff_get_normalized_symtab PARAMS ((bfd *));
321 extern long coff_get_reloc_upper_bound PARAMS ((bfd *, sec_ptr));
322 extern asymbol *coff_make_empty_symbol PARAMS ((bfd *));
323 extern void coff_print_symbol PARAMS ((bfd *, PTR filep, asymbol *,
324 bfd_print_symbol_type how));
325 extern void coff_get_symbol_info PARAMS ((bfd *, asymbol *,
326 symbol_info *ret));
327 extern boolean _bfd_coff_is_local_label_name PARAMS ((bfd *, const char *));
328 extern asymbol *coff_bfd_make_debug_symbol PARAMS ((bfd *, PTR,
329 unsigned long));
330 extern boolean coff_find_nearest_line PARAMS ((bfd *,
331 asection *,
332 asymbol **,
333 bfd_vma offset,
334 CONST char **filename_ptr,
335 CONST char **functionname_ptr,
336 unsigned int *line_ptr));
337 extern int coff_sizeof_headers PARAMS ((bfd *, boolean reloc));
338 extern boolean bfd_coff_reloc16_relax_section
339 PARAMS ((bfd *, asection *, struct bfd_link_info *, boolean *));
340 extern bfd_byte *bfd_coff_reloc16_get_relocated_section_contents
341 PARAMS ((bfd *, struct bfd_link_info *, struct bfd_link_order *,
342 bfd_byte *, boolean relocateable, asymbol **));
343 extern bfd_vma bfd_coff_reloc16_get_value PARAMS ((arelent *,
344 struct bfd_link_info *,
345 asection *));
346 extern void bfd_perform_slip PARAMS ((bfd *abfd, unsigned int slip,
347 asection *input_section,
348 bfd_vma val));
349
350 /* Functions and types in cofflink.c. */
351
352 #define STRING_SIZE_SIZE (4)
353
354 /* We use a hash table to merge identical enum, struct, and union
355 definitions in the linker. */
356
357 /* Information we keep for a single element (an enum value, a
358 structure or union field) in the debug merge hash table. */
359
360 struct coff_debug_merge_element
361 {
362 /* Next element. */
363 struct coff_debug_merge_element *next;
364
365 /* Name. */
366 const char *name;
367
368 /* Type. */
369 unsigned int type;
370
371 /* Symbol index for complex type. */
372 long tagndx;
373 };
374
375 /* A linked list of debug merge entries for a given name. */
376
377 struct coff_debug_merge_type
378 {
379 /* Next type with the same name. */
380 struct coff_debug_merge_type *next;
381
382 /* Class of type. */
383 int class;
384
385 /* Symbol index where this type is defined. */
386 long indx;
387
388 /* List of elements. */
389 struct coff_debug_merge_element *elements;
390 };
391
392 /* Information we store in the debug merge hash table. */
393
394 struct coff_debug_merge_hash_entry
395 {
396 struct bfd_hash_entry root;
397
398 /* A list of types with this name. */
399 struct coff_debug_merge_type *types;
400 };
401
402 /* The debug merge hash table. */
403
404 struct coff_debug_merge_hash_table
405 {
406 struct bfd_hash_table root;
407 };
408
409 /* Initialize a COFF debug merge hash table. */
410
411 #define coff_debug_merge_hash_table_init(table) \
412 (bfd_hash_table_init (&(table)->root, _bfd_coff_debug_merge_hash_newfunc))
413
414 /* Free a COFF debug merge hash table. */
415
416 #define coff_debug_merge_hash_table_free(table) \
417 (bfd_hash_table_free (&(table)->root))
418
419 /* Look up an entry in a COFF debug merge hash table. */
420
421 #define coff_debug_merge_hash_lookup(table, string, create, copy) \
422 ((struct coff_debug_merge_hash_entry *) \
423 bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
424
425 /* Information we keep for each section in the output file when doing
426 a relocateable link. */
427
428 struct coff_link_section_info
429 {
430 /* The relocs to be output. */
431 struct internal_reloc *relocs;
432 /* For each reloc against a global symbol whose index was not known
433 when the reloc was handled, the global hash table entry. */
434 struct coff_link_hash_entry **rel_hashes;
435 };
436
437 /* Information that we pass around while doing the final link step. */
438
439 struct coff_final_link_info
440 {
441 /* General link information. */
442 struct bfd_link_info *info;
443 /* Output BFD. */
444 bfd *output_bfd;
445 /* Used to indicate failure in traversal routine. */
446 boolean failed;
447 /* If doing "task linking" set only during the time when we want the
448 global symbol writer to convert the storage class of defined global
449 symbols from global to static. */
450 boolean global_to_static;
451 /* Hash table for long symbol names. */
452 struct bfd_strtab_hash *strtab;
453 /* When doing a relocateable link, an array of information kept for
454 each output section, indexed by the target_index field. */
455 struct coff_link_section_info *section_info;
456 /* Symbol index of last C_FILE symbol (-1 if none). */
457 long last_file_index;
458 /* Contents of last C_FILE symbol. */
459 struct internal_syment last_file;
460 /* Symbol index of first aux entry of last .bf symbol with an empty
461 endndx field (-1 if none). */
462 long last_bf_index;
463 /* Contents of last_bf_index aux entry. */
464 union internal_auxent last_bf;
465 /* Hash table used to merge debug information. */
466 struct coff_debug_merge_hash_table debug_merge;
467 /* Buffer large enough to hold swapped symbols of any input file. */
468 struct internal_syment *internal_syms;
469 /* Buffer large enough to hold sections of symbols of any input file. */
470 asection **sec_ptrs;
471 /* Buffer large enough to hold output indices of symbols of any
472 input file. */
473 long *sym_indices;
474 /* Buffer large enough to hold output symbols for any input file. */
475 bfd_byte *outsyms;
476 /* Buffer large enough to hold external line numbers for any input
477 section. */
478 bfd_byte *linenos;
479 /* Buffer large enough to hold any input section. */
480 bfd_byte *contents;
481 /* Buffer large enough to hold external relocs of any input section. */
482 bfd_byte *external_relocs;
483 /* Buffer large enough to hold swapped relocs of any input section. */
484 struct internal_reloc *internal_relocs;
485 };
486
487 /* Most COFF variants have no way to record the alignment of a
488 section. This struct is used to set a specific alignment based on
489 the name of the section. */
490
491 struct coff_section_alignment_entry
492 {
493 /* The section name. */
494 const char *name;
495
496 /* This is either (unsigned int) -1, indicating that the section
497 name must match exactly, or it is the number of letters which
498 must match at the start of the name. */
499 unsigned int comparison_length;
500
501 /* These macros may be used to fill in the first two fields in a
502 structure initialization. */
503 #define COFF_SECTION_NAME_EXACT_MATCH(name) (name), ((unsigned int) -1)
504 #define COFF_SECTION_NAME_PARTIAL_MATCH(name) (name), (sizeof (name) - 1)
505
506 /* Only use this entry if the default section alignment for this
507 target is at least that much (as a power of two). If this field
508 is COFF_ALIGNMENT_FIELD_EMPTY, it should be ignored. */
509 unsigned int default_alignment_min;
510
511 /* Only use this entry if the default section alignment for this
512 target is no greater than this (as a power of two). If this
513 field is COFF_ALIGNMENT_FIELD_EMPTY, it should be ignored. */
514 unsigned int default_alignment_max;
515
516 #define COFF_ALIGNMENT_FIELD_EMPTY ((unsigned int) -1)
517
518 /* The desired alignment for this section (as a power of two). */
519 unsigned int alignment_power;
520 };
521
522 extern struct bfd_hash_entry *_bfd_coff_link_hash_newfunc
523 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
524 extern boolean _bfd_coff_link_hash_table_init
525 PARAMS ((struct coff_link_hash_table *, bfd *,
526 struct bfd_hash_entry *(*) (struct bfd_hash_entry *,
527 struct bfd_hash_table *,
528 const char *)));
529 extern struct bfd_link_hash_table *_bfd_coff_link_hash_table_create
530 PARAMS ((bfd *));
531 extern const char *_bfd_coff_internal_syment_name
532 PARAMS ((bfd *, const struct internal_syment *, char *));
533 extern boolean _bfd_coff_link_add_symbols
534 PARAMS ((bfd *, struct bfd_link_info *));
535 extern boolean _bfd_coff_final_link
536 PARAMS ((bfd *, struct bfd_link_info *));
537 extern struct internal_reloc *_bfd_coff_read_internal_relocs
538 PARAMS ((bfd *, asection *, boolean, bfd_byte *, boolean,
539 struct internal_reloc *));
540 extern boolean _bfd_coff_generic_relocate_section
541 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
542 struct internal_reloc *, struct internal_syment *, asection **));
543
544 extern struct bfd_hash_entry *_bfd_coff_debug_merge_hash_newfunc
545 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
546 extern boolean _bfd_coff_write_global_sym
547 PARAMS ((struct coff_link_hash_entry *, PTR));
548 extern boolean _bfd_coff_write_task_globals
549 PARAMS ((struct coff_link_hash_entry *, PTR));
550 extern boolean _bfd_coff_link_input_bfd
551 PARAMS ((struct coff_final_link_info *, bfd *));
552 extern boolean _bfd_coff_reloc_link_order
553 PARAMS ((bfd *, struct coff_final_link_info *, asection *,
554 struct bfd_link_order *));
555
556
557 #define coff_get_section_contents_in_window \
558 _bfd_generic_get_section_contents_in_window
559
560 /* Functions in xcofflink.c. */
561
562 extern long _bfd_xcoff_get_dynamic_symtab_upper_bound PARAMS ((bfd *));
563 extern long _bfd_xcoff_canonicalize_dynamic_symtab
564 PARAMS ((bfd *, asymbol **));
565 extern long _bfd_xcoff_get_dynamic_reloc_upper_bound PARAMS ((bfd *));
566 extern long _bfd_xcoff_canonicalize_dynamic_reloc
567 PARAMS ((bfd *, arelent **, asymbol **));
568 extern struct bfd_link_hash_table *_bfd_xcoff_bfd_link_hash_table_create
569 PARAMS ((bfd *));
570 extern boolean _bfd_xcoff_bfd_link_add_symbols
571 PARAMS ((bfd *, struct bfd_link_info *));
572 extern boolean _bfd_xcoff_bfd_final_link
573 PARAMS ((bfd *, struct bfd_link_info *));
574 extern boolean _bfd_ppc_xcoff_relocate_section
575 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
576 struct internal_reloc *, struct internal_syment *, asection **));
577
578 /* Functions in coff-ppc.c. FIXME: These are called be pe.em in the
579 linker, and so should start with bfd and be declared in bfd.h. */
580
581 extern boolean ppc_allocate_toc_section PARAMS ((struct bfd_link_info *));
582 extern boolean ppc_process_before_allocation
583 PARAMS ((bfd *, struct bfd_link_info *));
584
585 /* And more taken from the source .. */
586
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