aboutsummaryrefslogtreecommitdiff
path: root/binutils/rescoff.c
blob: 9151eab93fcbc2769b26fd441d82e97b7b252dcb (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
/* rescoff.c -- read and write resources in Windows COFF files.
   Copyright (C) 1997-2016 Free Software Foundation, Inc.
   Written by Ian Lance Taylor, Cygnus Support.
   Rewritten by Kai Tietz, Onevision.

   This file is part of GNU Binutils.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
   02110-1301, USA.  */

/* This file contains function that read and write Windows resources
   in COFF files.  */

#include "sysdep.h"
#include "bfd.h"
#include "bucomm.h"
#include "libiberty.h"
#include "windres.h"

#include <assert.h>

/* In order to use the address of a resource data entry, we need to
   get the image base of the file.  Right now we extract it from
   internal BFD information.  FIXME.  */

#include "coff/internal.h"
#include "libcoff.h"

/* Information we extract from the file.  */

struct coff_file_info
{
  /* File name.  */
  const char *filename;
  /* Data read from the file.  */
  const bfd_byte *data;
  /* End of data read from file.  */
  const bfd_byte *data_end;
  /* Address of the resource section minus the image base of the file.  */
  rc_uint_type secaddr;
};

/* A resource directory table in a COFF file.  */

struct __attribute__ ((__packed__)) extern_res_directory
{
  /* Characteristics.  */
  bfd_byte characteristics[4];
  /* Time stamp.  */
  bfd_byte time[4];
  /* Major version number.  */
  bfd_byte major[2];
  /* Minor version number.  */
  bfd_byte minor[2];
  /* Number of named directory entries.  */
  bfd_byte name_count[2];
  /* Number of directory entries with IDs.  */
  bfd_byte id_count[2];
};

/* A resource directory entry in a COFF file.  */

struct extern_res_entry
{
  /* Name or ID.  */
  bfd_byte name[4];
  /* Address of resource entry or subdirectory.  */
  bfd_byte rva[4];
};

/* A resource data entry in a COFF file.  */

struct extern_res_data
{
  /* Address of resource data.  This is apparently a file relative
     address, rather than a section offset.  */
  bfd_byte rva[4];
  /* Size of resource data.  */
  bfd_byte size[4];
  /* Code page.  */
  bfd_byte codepage[4];
  /* Reserved.  */
  bfd_byte reserved[4];
};

/* Local functions.  */

static void overrun (const struct coff_file_info *, const char *);
static rc_res_directory *read_coff_res_dir (windres_bfd *, const bfd_byte *,
					    const struct coff_file_info *,
					    const rc_res_id *, int);
static rc_res_resource *read_coff_data_entry (windres_bfd *, const bfd_byte *,
					      const struct coff_file_info *,
					      const rc_res_id *);

/* Read the resources in a COFF file.  */

rc_res_directory *
read_coff_rsrc (const char *filename, const char *target)
{
  rc_res_directory *ret;
  bfd *abfd;
  windres_bfd wrbfd;
  char **matching;
  asection *sec;
  bfd_size_type size;
  bfd_byte *data;
  struct coff_file_info flaginfo;

  if (filename == NULL)
    fatal (_("filename required for COFF input"));

  abfd = bfd_openr (filename, target);
  if (abfd == NULL)
    bfd_fatal (filename);

  if (! bfd_check_format_matches (abfd, bfd_object, &matching))
    {
      bfd_nonfatal (bfd_get_filename (abfd));
      if (bfd_get_error () == bfd_error_file_ambiguously_recognized)
	list_matching_formats (matching);
      xexit (1);
    }

  sec = bfd_get_section_by_name (abfd, ".rsrc");
  if (sec == NULL)
    {
      fatal (_("%s: no resource section"), filename);
    }

  set_windres_bfd (&wrbfd, abfd, sec, WR_KIND_BFD);
  size = bfd_section_size (abfd, sec);
  /* PR 17512: file: 1b25ba5d
     The call to get_file_size here may be expensive
     but there is no other way to determine if the section size
     is reasonable.  */
  if (size > (bfd_size_type) get_file_size (filename))
    fatal (_("%s: .rsrc section is bigger than the file!"), filename);

  data = (bfd_byte *) res_alloc (size);
  get_windres_bfd_content (&wrbfd, data, 0, size);

  flaginfo.filename = filename;
  flaginfo.data = data;
  flaginfo.data_end = data + size;
  flaginfo.secaddr = (bfd_get_section_vma (abfd, sec)
		   - pe_data (abfd)->pe_opthdr.ImageBase);

  /* Now just read in the top level resource directory.  Note that we
     don't free data, since we create resource entries that point into
     it.  If we ever want to free up the resource information we read,
     this will have to be cleaned up.  */

  ret = read_coff_res_dir (&wrbfd, data, &flaginfo, (const rc_res_id *) NULL, 0);

  bfd_close (abfd);

  return ret;
}

/* Give an error if we are out of bounds.  */

static void
overrun (const struct coff_file_info *flaginfo, const char *msg)
{
  fatal (_("%s: %s: address out of bounds"), flaginfo->filename, msg);
}

/* Read a resource directory.  */

static rc_res_directory *
read_coff_res_dir (windres_bfd *wrbfd, const bfd_byte *data,
		   const struct coff_file_info *flaginfo,
		   const rc_res_id *type, int level)
{
  const struct extern_res_directory *erd;
  rc_res_directory *rd;
  int name_count, id_count, i;
  rc_res_entry **pp;
  const struct extern_res_entry *ere;

  /* PR 17512: file: 09d80f53.
     Whilst in theory resources can nest to any level, in practice
     Microsoft only defines 3 levels.  Corrupt files however might
     claim to use more.  */
  if (level > 4)
    overrun (flaginfo, _("Resources nest too deep"));

  if ((size_t) (flaginfo->data_end - data) < sizeof (struct extern_res_directory))
    overrun (flaginfo, _("directory"));

  erd = (const struct extern_res_directory *) data;

  rd = (rc_res_directory *) res_alloc (sizeof (rc_res_directory));
  rd->characteristics = windres_get_32 (wrbfd, erd->characteristics, 4);
  rd->time = windres_get_32 (wrbfd, erd->time, 4);
  rd->major = windres_get_16 (wrbfd, erd->major, 2);
  rd->minor = windres_get_16 (wrbfd, erd->minor, 2);
  rd->entries = NULL;

  name_count = windres_get_16 (wrbfd, erd->name_count, 2);
  id_count = windres_get_16 (wrbfd, erd->id_count, 2);

  pp = &rd->entries;

  /* The resource directory entries immediately follow the directory
     table.  */
  ere = (const struct extern_res_entry *) (erd + 1);

  for (i = 0; i < name_count; i++, ere++)
    {
      rc_uint_type name, rva;
      rc_res_entry *re;
      const bfd_byte *ers;
      int length, j;

      if ((const bfd_byte *) ere >= flaginfo->data_end)
	overrun (flaginfo, _("named directory entry"));

      name = windres_get_32 (wrbfd, ere->name, 4);
      rva = windres_get_32 (wrbfd, ere->rva, 4);

      /* For some reason the high bit in NAME is set.  */
      name &=~ 0x80000000;

      if (name > (rc_uint_type) (flaginfo->data_end - flaginfo->data))
	overrun (flaginfo, _("directory entry name"));

      ers = flaginfo->data + name;

      re = (rc_res_entry *) res_alloc (sizeof *re);
      re->next = NULL;
      re->id.named = 1;
      length = windres_get_16 (wrbfd, ers, 2);
      re->id.u.n.length = length;
      re->id.u.n.name = (unichar *) res_alloc (length * sizeof (unichar));
      for (j = 0; j < length; j++)
	{
	  /* PR 17512: file: 05dc4a16.  */
	  if (length < 0 || ers >= flaginfo->data_end || ers + j * 2 + 4 >= flaginfo->data_end)
	    overrun (flaginfo, _("resource name"));
	  re->id.u.n.name[j] = windres_get_16 (wrbfd, ers + j * 2 + 2, 2);
	}

      if (level == 0)
	type = &re->id;

      if ((rva & 0x80000000) != 0)
	{
	  rva &=~ 0x80000000;
	  if (rva >= (rc_uint_type) (flaginfo->data_end - flaginfo->data))
	    overrun (flaginfo, _("named subdirectory"));
	  re->subdir = 1;
	  re->u.dir = read_coff_res_dir (wrbfd, flaginfo->data + rva, flaginfo, type,
					 level + 1);
	}
      else
	{
	  if (rva >= (rc_uint_type) (flaginfo->data_end - flaginfo->data))
	    overrun (flaginfo, _("named resource"));
	  re->subdir = 0;
	  re->u.res = read_coff_data_entry (wrbfd, flaginfo->data + rva, flaginfo, type);
	}

      *pp = re;
      pp = &re->next;
    }

  for (i = 0; i < id_count; i++, ere++)
    {
      unsigned long name, rva;
      rc_res_entry *re;

      if ((const bfd_byte *) ere >= flaginfo->data_end)
	overrun (flaginfo, _("ID directory entry"));

      name = windres_get_32 (wrbfd, ere->name, 4);
      rva = windres_get_32 (wrbfd, ere->rva, 4);

      re = (rc_res_entry *) res_alloc (sizeof *re);
      re->next = NULL;
      re->id.named = 0;
      re->id.u.id = name;

      if (level == 0)
	type = &re->id;

      if ((rva & 0x80000000) != 0)
	{
	  rva &=~ 0x80000000;
	  if (rva >= (rc_uint_type) (flaginfo->data_end - flaginfo->data))
	    overrun (flaginfo, _("ID subdirectory"));
	  re->subdir = 1;
	  re->u.dir = read_coff_res_dir (wrbfd, flaginfo->data + rva, flaginfo, type,
					 level + 1);
	}
      else
	{
	  if (rva >= (rc_uint_type) (flaginfo->data_end - flaginfo->data))
	    overrun (flaginfo, _("ID resource"));
	  re->subdir = 0;
	  re->u.res = read_coff_data_entry (wrbfd, flaginfo->data + rva, flaginfo, type);
	}

      *pp = re;
      pp = &re->next;
    }

  return rd;
}

/* Read a resource data entry.  */

static rc_res_resource *
read_coff_data_entry (windres_bfd *wrbfd, const bfd_byte *data,
		      const struct coff_file_info *flaginfo,
		      const rc_res_id *type)
{
  const struct extern_res_data *erd;
  rc_res_resource *r;
  rc_uint_type size, rva;
  const bfd_byte *resdata;

  if (type == NULL)
    fatal (_("resource type unknown"));

  if ((size_t) (flaginfo->data_end - data) < sizeof (struct extern_res_data))
    overrun (flaginfo, _("data entry"));

  erd = (const struct extern_res_data *) data;

  size = windres_get_32 (wrbfd, erd->size, 4);
  rva = windres_get_32 (wrbfd, erd->rva, 4);
  if (rva < flaginfo->secaddr
      || rva - flaginfo->secaddr >= (rc_uint_type) (flaginfo->data_end - flaginfo->data))
    overrun (flaginfo, _("resource data"));

  resdata = flaginfo->data + (rva - flaginfo->secaddr);

  if (size > (rc_uint_type) (flaginfo->data_end - resdata))
    overrun (flaginfo, _("resource data size"));

  r = bin_to_res (wrbfd, *type, resdata, size);

  memset (&r->res_info, 0, sizeof (rc_res_res_info));
  r->coff_info.codepage = windres_get_32 (wrbfd, erd->codepage, 4);
  r->coff_info.reserved = windres_get_32 (wrbfd, erd->reserved, 4);

  return r;
}

/* This structure is used to build a list of bindata structures.  */

struct bindata_build
{
  /* The data.  */
  bindata *d;
  /* The last structure we have added to the list.  */
  bindata *last;
  /* The size of the list as a whole.  */
  unsigned long length;
};

struct coff_res_data_build
{
  /* The data.  */
  coff_res_data *d;
  /* The last structure we have added to the list.  */
  coff_res_data *last;
  /* The size of the list as a whole.  */
  unsigned long length;
};

/* This structure keeps track of information as we build the directory
   tree.  */

struct coff_write_info
{
  /* These fields are based on the BFD.  */
  /* The BFD itself.  */
  windres_bfd *wrbfd;
  /* Pointer to section symbol used to build RVA relocs.  */
  asymbol **sympp;

  /* These fields are computed initially, and then not changed.  */
  /* Length of directory tables and entries.  */
  unsigned long dirsize;
  /* Length of directory entry strings.  */
  unsigned long dirstrsize;
  /* Length of resource data entries.  */
  unsigned long dataentsize;

  /* These fields are updated as we add data.  */
  /* Directory tables and entries.  */
  struct bindata_build dirs;
  /* Directory entry strings.  */
  struct bindata_build dirstrs;
  /* Resource data entries.  */
  struct bindata_build dataents;
  /* Actual resource data.  */
  struct coff_res_data_build resources;
  /* Relocations.  */
  arelent **relocs;
  /* Number of relocations.  */
  unsigned int reloc_count;
};

static void coff_bin_sizes (const rc_res_directory *, struct coff_write_info *);
static bfd_byte *coff_alloc (struct bindata_build *, rc_uint_type);
static void coff_to_bin
  (const rc_res_directory *, struct coff_write_info *);
static void coff_res_to_bin
  (const rc_res_resource *, struct coff_write_info *);

/* Write resources to a COFF file.  RESOURCES should already be
   sorted.

   Right now we always create a new file.  Someday we should also
   offer the ability to merge resources into an existing file.  This
   would require doing the basic work of objcopy, just modifying or
   adding the .rsrc section.  */

void
write_coff_file (const char *filename, const char *target,
		 const rc_res_directory *resources)
{
  bfd *abfd;
  asection *sec;
  struct coff_write_info cwi;
  windres_bfd wrbfd;
  bindata *d;
  coff_res_data *rd;
  unsigned long length, offset;

  if (filename == NULL)
    fatal (_("filename required for COFF output"));

  abfd = bfd_openw (filename, target);
  if (abfd == NULL)
    bfd_fatal (filename);

  if (! bfd_set_format (abfd, bfd_object))
    bfd_fatal ("bfd_set_format");

#if defined DLLTOOL_SH
  if (! bfd_set_arch_mach (abfd, bfd_arch_sh, 0))
    bfd_fatal ("bfd_set_arch_mach(sh)");
#elif defined DLLTOOL_MIPS
  if (! bfd_set_arch_mach (abfd, bfd_arch_mips, 0))
    bfd_fatal ("bfd_set_arch_mach(mips)");
#elif defined DLLTOOL_ARM
  if (! bfd_set_arch_mach (abfd, bfd_arch_arm, 0))
    bfd_fatal ("bfd_set_arch_mach(arm)");
#else
  /* FIXME: This is obviously i386 specific.  */
  if (! bfd_set_arch_mach (abfd, bfd_arch_i386, 0))
    bfd_fatal ("bfd_set_arch_mach(i386)");
#endif

  if (! bfd_set_file_flags (abfd, HAS_SYMS | HAS_RELOC))
    bfd_fatal ("bfd_set_file_flags");

  sec = bfd_make_section_with_flags (abfd, ".rsrc",
				     (SEC_HAS_CONTENTS | SEC_ALLOC
				      | SEC_LOAD | SEC_DATA));
  if (sec == NULL)
    bfd_fatal ("bfd_make_section");

  if (! bfd_set_symtab (abfd, sec->symbol_ptr_ptr, 1))
    bfd_fatal ("bfd_set_symtab");

  /* Requiring this is probably a bug in BFD.  */
  sec->output_section = sec;

  /* The order of data in the .rsrc section is
       resource directory tables and entries
       resource directory strings
       resource data entries
       actual resource data

     We build these different types of data in different lists.  */

  set_windres_bfd (&wrbfd, abfd, sec, WR_KIND_BFD);

  cwi.wrbfd = &wrbfd;
  cwi.sympp = sec->symbol_ptr_ptr;
  cwi.dirsize = 0;
  cwi.dirstrsize = 0;
  cwi.dataentsize = 0;
  cwi.dirs.d = NULL;
  cwi.dirs.last = NULL;
  cwi.dirs.length = 0;
  cwi.dirstrs.d = NULL;
  cwi.dirstrs.last = NULL;
  cwi.dirstrs.length = 0;
  cwi.dataents.d = NULL;
  cwi.dataents.last = NULL;
  cwi.dataents.length = 0;
  cwi.resources.d = NULL;
  cwi.resources.last = NULL;
  cwi.resources.length = 0;
  cwi.relocs = NULL;
  cwi.reloc_count = 0;

  /* Work out the sizes of the resource directory entries, so that we
     know the various offsets we will need.  */
  coff_bin_sizes (resources, &cwi);

  /* Force the directory strings to be 64 bit aligned.  Every other
     structure is 64 bit aligned anyhow.  */
  cwi.dirstrsize = (cwi.dirstrsize + 7) & ~7;

  /* Actually convert the resources to binary.  */
  coff_to_bin (resources, &cwi);

  /* Add another few bytes to the directory strings if needed for
     alignment.  */
  if ((cwi.dirstrs.length & 7) != 0)
    {
      rc_uint_type pad = 8 - (cwi.dirstrs.length & 7);
      bfd_byte *ex;

      ex = coff_alloc (& cwi.dirstrs, pad);
      memset (ex, 0, pad);
    }

  /* Make sure that the data we built came out to the same size as we
     calculated initially.  */
  assert (cwi.dirs.length == cwi.dirsize);
  assert (cwi.dirstrs.length == cwi.dirstrsize);
  assert (cwi.dataents.length == cwi.dataentsize);

  length = (cwi.dirsize
	    + cwi.dirstrsize
	    + cwi.dataentsize
	    + cwi.resources.length);

  if (! bfd_set_section_size (abfd, sec, length))
    bfd_fatal ("bfd_set_section_size");

  bfd_set_reloc (abfd, sec, cwi.relocs, cwi.reloc_count);

  offset = 0;
  for (d = cwi.dirs.d; d != NULL; d = d->next)
    {
      if (! bfd_set_section_contents (abfd, sec, d->data, offset, d->length))
	bfd_fatal ("bfd_set_section_contents");
      offset += d->length;
    }
  for (d = cwi.dirstrs.d; d != NULL; d = d->next)
    {
      set_windres_bfd_content (&wrbfd, d->data, offset, d->length);
      offset += d->length;
    }
  for (d = cwi.dataents.d; d != NULL; d = d->next)
    {
      set_windres_bfd_content (&wrbfd, d->data, offset, d->length);
      offset += d->length;
    }
  for (rd = cwi.resources.d; rd != NULL; rd = rd->next)
    {
      res_to_bin (cwi.wrbfd, (rc_uint_type) offset, rd->res);
      offset += rd->length;
    }

  assert (offset == length);

  if (! bfd_close (abfd))
    bfd_fatal ("bfd_close");

  /* We allocated the relocs array using malloc.  */
  free (cwi.relocs);
}

/* Work out the sizes of the various fixed size resource directory
   entries.  This updates fields in CWI.  */

static void
coff_bin_sizes (const rc_res_directory *resdir,
		struct coff_write_info *cwi)
{
  const rc_res_entry *re;

  cwi->dirsize += sizeof (struct extern_res_directory);

  for (re = resdir->entries; re != NULL; re = re->next)
    {
      cwi->dirsize += sizeof (struct extern_res_entry);

      if (re->id.named)
	cwi->dirstrsize += re->id.u.n.length * 2 + 2;

      if (re->subdir)
	coff_bin_sizes (re->u.dir, cwi);
      else
	cwi->dataentsize += sizeof (struct extern_res_data);
    }
}

/* Allocate data for a particular list.  */

static bfd_byte *
coff_alloc (struct bindata_build *bb, rc_uint_type size)
{
  bindata *d;

  d = (bindata *) reswr_alloc (sizeof (bindata));

  d->next = NULL;
  d->data = (bfd_byte *) reswr_alloc (size);
  d->length = size;

  if (bb->d == NULL)
    bb->d = d;
  else
    bb->last->next = d;
  bb->last = d;
  bb->length += size;

  return d->data;
}

/* Convert the resource directory RESDIR to binary.  */

static void
coff_to_bin (const rc_res_directory *resdir, struct coff_write_info *cwi)
{
  struct extern_res_directory *erd;
  int ci, cn;
  const rc_res_entry *e;
  struct extern_res_entry *ere;

  /* Write out the directory table.  */

  erd = ((struct extern_res_directory *)
	 coff_alloc (&cwi->dirs, sizeof (*erd)));

  windres_put_32 (cwi->wrbfd, erd->characteristics, resdir->characteristics);
  windres_put_32 (cwi->wrbfd, erd->time, resdir->time);
  windres_put_16 (cwi->wrbfd, erd->major, resdir->major);
  windres_put_16 (cwi->wrbfd, erd->minor, resdir->minor);

  ci = 0;
  cn = 0;
  for (e = resdir->entries; e != NULL; e = e->next)
    {
      if (e->id.named)
	++cn;
      else
	++ci;
    }

  windres_put_16 (cwi->wrbfd, erd->name_count, cn);
  windres_put_16 (cwi->wrbfd, erd->id_count, ci);

  /* Write out the data entries.  Note that we allocate space for all
     the entries before writing them out.  That permits a recursive
     call to work correctly when writing out subdirectories.  */

  ere = ((struct extern_res_entry *)
	 coff_alloc (&cwi->dirs, (ci + cn) * sizeof (*ere)));
  for (e = resdir->entries; e != NULL; e = e->next, ere++)
    {
      if (! e->id.named)
	windres_put_32 (cwi->wrbfd, ere->name, e->id.u.id);
      else
	{
	  bfd_byte *str;
	  rc_uint_type i;

	  /* For some reason existing files seem to have the high bit
             set on the address of the name, although that is not
             documented.  */
	  windres_put_32 (cwi->wrbfd, ere->name,
		     0x80000000 | (cwi->dirsize + cwi->dirstrs.length));

	  str = coff_alloc (&cwi->dirstrs, e->id.u.n.length * 2 + 2);
	  windres_put_16 (cwi->wrbfd, str, e->id.u.n.length);
	  for (i = 0; i < e->id.u.n.length; i++)
	    windres_put_16 (cwi->wrbfd, str + (i + 1) * sizeof (unichar), e->id.u.n.name[i]);
	}

      if (e->subdir)
	{
	  windres_put_32 (cwi->wrbfd, ere->rva, 0x80000000 | cwi->dirs.length);
	  coff_to_bin (e->u.dir, cwi);
	}
      else
	{
	  windres_put_32 (cwi->wrbfd, ere->rva,
		     cwi->dirsize + cwi->dirstrsize + cwi->dataents.length);

	  coff_res_to_bin (e->u.res, cwi);
	}
    }
}

/* Convert the resource RES to binary.  */

static void
coff_res_to_bin (const rc_res_resource *res, struct coff_write_info *cwi)
{
  arelent *r;
  struct extern_res_data *erd;
  coff_res_data *d;

  /* For some reason, although every other address is a section
     offset, the address of the resource data itself is an RVA.  That
     means that we need to generate a relocation for it.  We allocate
     the relocs array using malloc so that we can use realloc.  FIXME:
     This relocation handling is correct for the i386, but probably
     not for any other target.  */

  r = (arelent *) reswr_alloc (sizeof (arelent));
  r->sym_ptr_ptr = cwi->sympp;
  r->address = cwi->dirsize + cwi->dirstrsize + cwi->dataents.length;
  r->addend = 0;
  r->howto = bfd_reloc_type_lookup (WR_BFD (cwi->wrbfd), BFD_RELOC_RVA);
  if (r->howto == NULL)
    bfd_fatal (_("can't get BFD_RELOC_RVA relocation type"));

  cwi->relocs = xrealloc (cwi->relocs,
			  (cwi->reloc_count + 2) * sizeof (arelent *));
  cwi->relocs[cwi->reloc_count] = r;
  cwi->relocs[cwi->reloc_count + 1] = NULL;
  ++cwi->reloc_count;

  erd = (struct extern_res_data *) coff_alloc (&cwi->dataents, sizeof (*erd));

  windres_put_32 (cwi->wrbfd, erd->rva,
	     (cwi->dirsize
	      + cwi->dirstrsize
	      + cwi->dataentsize
	      + cwi->resources.length));
  windres_put_32 (cwi->wrbfd, erd->codepage, res->coff_info.codepage);
  windres_put_32 (cwi->wrbfd, erd->reserved, res->coff_info.reserved);

  d = (coff_res_data *) reswr_alloc (sizeof (coff_res_data));
  d->length = res_to_bin (NULL, (rc_uint_type) 0, res);
  d->res = res;
  d->next = NULL;

  if (cwi->resources.d == NULL)
    cwi->resources.d = d;
  else
    cwi->resources.last->next = d;

  cwi->resources.last = d;
  cwi->resources.length += (d->length + 7) & ~7;

  windres_put_32 (cwi->wrbfd, erd->size, d->length);

  /* Force the next resource to have 64 bit alignment.  */
  d->length = (d->length + 7) & ~7;
}