2000-12-12 H.J. Lu <hjl@gnu.org>
[binutils.git] / binutils / rescoff.c
blob45161c3677db09f4a31a0e94819545779e305b0e
1 /* rescoff.c -- read and write resources in Windows COFF files.
2 Copyright 1997, 1998, 2000 Free Software Foundation, Inc.
3 Written by Ian Lance Taylor, Cygnus Support.
5 This file is part of GNU Binutils.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
20 02111-1307, USA. */
22 /* This file contains function that read and write Windows resources
23 in COFF files. */
25 #include "bfd.h"
26 #include "bucomm.h"
27 #include "libiberty.h"
28 #include "windres.h"
30 #include <assert.h>
32 /* In order to use the address of a resource data entry, we need to
33 get the image base of the file. Right now we extract it from
34 internal BFD information. FIXME. */
36 #include "coff/internal.h"
37 #include "libcoff.h"
39 /* Information we extract from the file. */
41 struct coff_file_info
43 /* File name. */
44 const char *filename;
45 /* Data read from the file. */
46 const bfd_byte *data;
47 /* End of data read from file. */
48 const bfd_byte *data_end;
49 /* Address of the resource section minus the image base of the file. */
50 bfd_vma secaddr;
51 /* Non-zero if the file is big endian. */
52 int big_endian;
55 /* A resource directory table in a COFF file. */
57 struct extern_res_directory
59 /* Characteristics. */
60 bfd_byte characteristics[4];
61 /* Time stamp. */
62 bfd_byte time[4];
63 /* Major version number. */
64 bfd_byte major[2];
65 /* Minor version number. */
66 bfd_byte minor[2];
67 /* Number of named directory entries. */
68 bfd_byte name_count[2];
69 /* Number of directory entries with IDs. */
70 bfd_byte id_count[2];
73 /* A resource directory entry in a COFF file. */
75 struct extern_res_entry
77 /* Name or ID. */
78 bfd_byte name[4];
79 /* Address of resource entry or subdirectory. */
80 bfd_byte rva[4];
83 /* A resource data entry in a COFF file. */
85 struct extern_res_data
87 /* Address of resource data. This is apparently a file relative
88 address, rather than a section offset. */
89 bfd_byte rva[4];
90 /* Size of resource data. */
91 bfd_byte size[4];
92 /* Code page. */
93 bfd_byte codepage[4];
94 /* Reserved. */
95 bfd_byte reserved[4];
98 /* Macros to swap in values. */
100 #define getfi_16(fi, s) ((fi)->big_endian ? bfd_getb16 (s) : bfd_getl16 (s))
101 #define getfi_32(fi, s) ((fi)->big_endian ? bfd_getb32 (s) : bfd_getl32 (s))
103 /* Local functions. */
105 static void overrun PARAMS ((const struct coff_file_info *, const char *));
106 static struct res_directory *read_coff_res_dir
107 PARAMS ((const bfd_byte *, const struct coff_file_info *,
108 const struct res_id *, int));
109 static struct res_resource *read_coff_data_entry
110 PARAMS ((const bfd_byte *, const struct coff_file_info *,
111 const struct res_id *));
113 /* Read the resources in a COFF file. */
115 struct res_directory *
116 read_coff_rsrc (filename, target)
117 const char *filename;
118 const char *target;
120 bfd *abfd;
121 char **matching;
122 asection *sec;
123 bfd_size_type size;
124 bfd_byte *data;
125 struct coff_file_info finfo;
127 if (filename == NULL)
128 fatal (_("filename required for COFF input"));
130 abfd = bfd_openr (filename, target);
131 if (abfd == NULL)
132 bfd_fatal (filename);
134 if (! bfd_check_format_matches (abfd, bfd_object, &matching))
136 bfd_nonfatal (bfd_get_filename (abfd));
137 if (bfd_get_error () == bfd_error_file_ambiguously_recognized)
138 list_matching_formats (matching);
139 xexit (1);
142 sec = bfd_get_section_by_name (abfd, ".rsrc");
143 if (sec == NULL)
145 fatal (_("%s: no resource section"), filename);
148 size = bfd_section_size (abfd, sec);
149 data = (bfd_byte *) res_alloc (size);
151 if (! bfd_get_section_contents (abfd, sec, data, 0, size))
152 bfd_fatal (_("can't read resource section"));
154 finfo.filename = filename;
155 finfo.data = data;
156 finfo.data_end = data + size;
157 finfo.secaddr = (bfd_get_section_vma (abfd, sec)
158 - pe_data (abfd)->pe_opthdr.ImageBase);
159 finfo.big_endian = bfd_big_endian (abfd);
161 bfd_close (abfd);
163 /* Now just read in the top level resource directory. Note that we
164 don't free data, since we create resource entries that point into
165 it. If we ever want to free up the resource information we read,
166 this will have to be cleaned up. */
168 return read_coff_res_dir (data, &finfo, (const struct res_id *) NULL, 0);
171 /* Give an error if we are out of bounds. */
173 static void
174 overrun (finfo, msg)
175 const struct coff_file_info *finfo;
176 const char *msg;
178 fatal (_("%s: %s: address out of bounds"), finfo->filename, msg);
181 /* Read a resource directory. */
183 static struct res_directory *
184 read_coff_res_dir (data, finfo, type, level)
185 const bfd_byte *data;
186 const struct coff_file_info *finfo;
187 const struct res_id *type;
188 int level;
190 const struct extern_res_directory *erd;
191 struct res_directory *rd;
192 int name_count, id_count, i;
193 struct res_entry **pp;
194 const struct extern_res_entry *ere;
196 if ((size_t) (finfo->data_end - data) < sizeof (struct extern_res_directory))
197 overrun (finfo, _("directory"));
199 erd = (const struct extern_res_directory *) data;
201 rd = (struct res_directory *) res_alloc (sizeof *rd);
202 rd->characteristics = getfi_32 (finfo, erd->characteristics);
203 rd->time = getfi_32 (finfo, erd->time);
204 rd->major = getfi_16 (finfo, erd->major);
205 rd->minor = getfi_16 (finfo, erd->minor);
206 rd->entries = NULL;
208 name_count = getfi_16 (finfo, erd->name_count);
209 id_count = getfi_16 (finfo, erd->id_count);
211 pp = &rd->entries;
213 /* The resource directory entries immediately follow the directory
214 table. */
215 ere = (const struct extern_res_entry *) (erd + 1);
217 for (i = 0; i < name_count; i++, ere++)
219 unsigned long name, rva;
220 struct res_entry *re;
221 const bfd_byte *ers;
222 int length, j;
224 if ((const bfd_byte *) ere >= finfo->data_end)
225 overrun (finfo, _("named directory entry"));
227 name = getfi_32 (finfo, ere->name);
228 rva = getfi_32 (finfo, ere->rva);
230 /* For some reason the high bit in NAME is set. */
231 name &=~ 0x80000000;
233 if (name > (size_t) (finfo->data_end - finfo->data))
234 overrun (finfo, _("directory entry name"));
236 ers = finfo->data + name;
238 re = (struct res_entry *) res_alloc (sizeof *re);
239 re->next = NULL;
240 re->id.named = 1;
241 length = getfi_16 (finfo, ers);
242 re->id.u.n.length = length;
243 re->id.u.n.name = (unichar *) res_alloc (length * sizeof (unichar));
244 for (j = 0; j < length; j++)
245 re->id.u.n.name[j] = getfi_16 (finfo, ers + j * 2 + 2);
247 if (level == 0)
248 type = &re->id;
250 if ((rva & 0x80000000) != 0)
252 rva &=~ 0x80000000;
253 if (rva >= (size_t) (finfo->data_end - finfo->data))
254 overrun (finfo, _("named subdirectory"));
255 re->subdir = 1;
256 re->u.dir = read_coff_res_dir (finfo->data + rva, finfo, type,
257 level + 1);
259 else
261 if (rva >= (size_t) (finfo->data_end - finfo->data))
262 overrun (finfo, _("named resource"));
263 re->subdir = 0;
264 re->u.res = read_coff_data_entry (finfo->data + rva, finfo, type);
267 *pp = re;
268 pp = &re->next;
271 for (i = 0; i < id_count; i++, ere++)
273 unsigned long name, rva;
274 struct res_entry *re;
276 if ((const bfd_byte *) ere >= finfo->data_end)
277 overrun (finfo, _("ID directory entry"));
279 name = getfi_32 (finfo, ere->name);
280 rva = getfi_32 (finfo, ere->rva);
282 re = (struct res_entry *) res_alloc (sizeof *re);
283 re->next = NULL;
284 re->id.named = 0;
285 re->id.u.id = name;
287 if (level == 0)
288 type = &re->id;
290 if ((rva & 0x80000000) != 0)
292 rva &=~ 0x80000000;
293 if (rva >= (size_t) (finfo->data_end - finfo->data))
294 overrun (finfo, _("ID subdirectory"));
295 re->subdir = 1;
296 re->u.dir = read_coff_res_dir (finfo->data + rva, finfo, type,
297 level + 1);
299 else
301 if (rva >= (size_t) (finfo->data_end - finfo->data))
302 overrun (finfo, _("ID resource"));
303 re->subdir = 0;
304 re->u.res = read_coff_data_entry (finfo->data + rva, finfo, type);
307 *pp = re;
308 pp = &re->next;
311 return rd;
314 /* Read a resource data entry. */
316 static struct res_resource *
317 read_coff_data_entry (data, finfo, type)
318 const bfd_byte *data;
319 const struct coff_file_info *finfo;
320 const struct res_id *type;
322 const struct extern_res_data *erd;
323 struct res_resource *r;
324 unsigned long size, rva;
325 const bfd_byte *resdata;
327 if (type == NULL)
328 fatal (_("resource type unknown"));
330 if ((size_t) (finfo->data_end - data) < sizeof (struct extern_res_data))
331 overrun (finfo, _("data entry"));
333 erd = (const struct extern_res_data *) data;
335 size = getfi_32 (finfo, erd->size);
336 rva = getfi_32 (finfo, erd->rva);
337 if (rva < finfo->secaddr
338 || rva - finfo->secaddr >= (size_t) (finfo->data_end - finfo->data))
339 overrun (finfo, _("resource data"));
341 resdata = finfo->data + (rva - finfo->secaddr);
343 if (size > (size_t) (finfo->data_end - resdata))
344 overrun (finfo, _("resource data size"));
346 r = bin_to_res (*type, resdata, size, finfo->big_endian);
348 memset (&r->res_info, 0, sizeof (struct res_res_info));
349 r->coff_info.codepage = getfi_32 (finfo, erd->codepage);
350 r->coff_info.reserved = getfi_32 (finfo, erd->reserved);
352 return r;
355 /* This structure is used to build a list of bindata structures. */
357 struct bindata_build
359 /* The data. */
360 struct bindata *d;
361 /* The last structure we have added to the list. */
362 struct bindata *last;
363 /* The size of the list as a whole. */
364 unsigned long length;
367 /* This structure keeps track of information as we build the directory
368 tree. */
370 struct coff_write_info
372 /* These fields are based on the BFD. */
373 /* The BFD itself. */
374 bfd *abfd;
375 /* Non-zero if the file is big endian. */
376 int big_endian;
377 /* Pointer to section symbol used to build RVA relocs. */
378 asymbol **sympp;
380 /* These fields are computed initially, and then not changed. */
381 /* Length of directory tables and entries. */
382 unsigned long dirsize;
383 /* Length of directory entry strings. */
384 unsigned long dirstrsize;
385 /* Length of resource data entries. */
386 unsigned long dataentsize;
388 /* These fields are updated as we add data. */
389 /* Directory tables and entries. */
390 struct bindata_build dirs;
391 /* Directory entry strings. */
392 struct bindata_build dirstrs;
393 /* Resource data entries. */
394 struct bindata_build dataents;
395 /* Actual resource data. */
396 struct bindata_build resources;
397 /* Relocations. */
398 arelent **relocs;
399 /* Number of relocations. */
400 unsigned int reloc_count;
403 /* Macros to swap out values. */
405 #define putcwi_16(cwi, v, s) \
406 ((cwi->big_endian) ? bfd_putb16 ((v), (s)) : bfd_putl16 ((v), (s)))
407 #define putcwi_32(cwi, v, s) \
408 ((cwi->big_endian) ? bfd_putb32 ((v), (s)) : bfd_putl32 ((v), (s)))
410 static void coff_bin_sizes
411 PARAMS ((const struct res_directory *, struct coff_write_info *));
412 static unsigned char *coff_alloc PARAMS ((struct bindata_build *, size_t));
413 static void coff_to_bin
414 PARAMS ((const struct res_directory *, struct coff_write_info *));
415 static void coff_res_to_bin
416 PARAMS ((const struct res_resource *, struct coff_write_info *));
418 /* Write resources to a COFF file. RESOURCES should already be
419 sorted.
421 Right now we always create a new file. Someday we should also
422 offer the ability to merge resources into an existing file. This
423 would require doing the basic work of objcopy, just modifying or
424 adding the .rsrc section. */
426 void
427 write_coff_file (filename, target, resources)
428 const char *filename;
429 const char *target;
430 const struct res_directory *resources;
432 bfd *abfd;
433 asection *sec;
434 struct coff_write_info cwi;
435 struct bindata *d;
436 unsigned long length, offset;
438 if (filename == NULL)
439 fatal (_("filename required for COFF output"));
441 abfd = bfd_openw (filename, target);
442 if (abfd == NULL)
443 bfd_fatal (filename);
445 if (! bfd_set_format (abfd, bfd_object))
446 bfd_fatal ("bfd_set_format");
448 #if defined DLLTOOL_SH
449 if (! bfd_set_arch_mach (abfd, bfd_arch_sh, 0))
450 bfd_fatal ("bfd_set_arch_mach(sh)");
451 #elif defined DLLTOOL_MIPS
452 if (! bfd_set_arch_mach (abfd, bfd_arch_mips, 0))
453 bfd_fatal ("bfd_set_arch_mach(mips)");
454 #elif defined DLLTOOL_ARM
455 if (! bfd_set_arch_mach (abfd, bfd_arch_arm, 0))
456 bfd_fatal ("bfd_set_arch_mach(arm)");
457 #else
458 /* FIXME: This is obviously i386 specific. */
459 if (! bfd_set_arch_mach (abfd, bfd_arch_i386, 0))
460 bfd_fatal ("bfd_set_arch_mach(i386)");
461 #endif
463 if (! bfd_set_file_flags (abfd, HAS_SYMS | HAS_RELOC))
464 bfd_fatal ("bfd_set_file_flags");
466 sec = bfd_make_section (abfd, ".rsrc");
467 if (sec == NULL)
468 bfd_fatal ("bfd_make_section");
470 if (! bfd_set_section_flags (abfd, sec,
471 (SEC_HAS_CONTENTS | SEC_ALLOC
472 | SEC_LOAD | SEC_DATA)))
473 bfd_fatal ("bfd_set_section_flags");
475 if (! bfd_set_symtab (abfd, sec->symbol_ptr_ptr, 1))
476 bfd_fatal ("bfd_set_symtab");
478 /* Requiring this is probably a bug in BFD. */
479 sec->output_section = sec;
481 /* The order of data in the .rsrc section is
482 resource directory tables and entries
483 resource directory strings
484 resource data entries
485 actual resource data
487 We build these different types of data in different lists. */
489 cwi.abfd = abfd;
490 cwi.big_endian = bfd_big_endian (abfd);
491 cwi.sympp = sec->symbol_ptr_ptr;
492 cwi.dirsize = 0;
493 cwi.dirstrsize = 0;
494 cwi.dataentsize = 0;
495 cwi.dirs.d = NULL;
496 cwi.dirs.last = NULL;
497 cwi.dirs.length = 0;
498 cwi.dirstrs.d = NULL;
499 cwi.dirstrs.last = NULL;
500 cwi.dirstrs.length = 0;
501 cwi.dataents.d = NULL;
502 cwi.dataents.last = NULL;
503 cwi.dataents.length = 0;
504 cwi.resources.d = NULL;
505 cwi.resources.last = NULL;
506 cwi.resources.length = 0;
507 cwi.relocs = NULL;
508 cwi.reloc_count = 0;
510 /* Work out the sizes of the resource directory entries, so that we
511 know the various offsets we will need. */
512 coff_bin_sizes (resources, &cwi);
514 /* Force the directory strings to be 32 bit aligned. Every other
515 structure is 32 bit aligned anyhow. */
516 cwi.dirstrsize = (cwi.dirstrsize + 3) &~ 3;
518 /* Actually convert the resources to binary. */
519 coff_to_bin (resources, &cwi);
521 /* Add another 2 bytes to the directory strings if needed for
522 alignment. */
523 if ((cwi.dirstrs.length & 3) != 0)
525 unsigned char *ex;
527 ex = coff_alloc (&cwi.dirstrs, 2);
528 ex[0] = 0;
529 ex[1] = 0;
532 /* Make sure that the data we built came out to the same size as we
533 calculated initially. */
534 assert (cwi.dirs.length == cwi.dirsize);
535 assert (cwi.dirstrs.length == cwi.dirstrsize);
536 assert (cwi.dataents.length == cwi.dataentsize);
538 length = (cwi.dirsize
539 + cwi.dirstrsize
540 + cwi.dataentsize
541 + cwi.resources.length);
543 if (! bfd_set_section_size (abfd, sec, length))
544 bfd_fatal ("bfd_set_section_size");
546 bfd_set_reloc (abfd, sec, cwi.relocs, cwi.reloc_count);
548 offset = 0;
549 for (d = cwi.dirs.d; d != NULL; d = d->next)
551 if (! bfd_set_section_contents (abfd, sec, d->data, offset, d->length))
552 bfd_fatal ("bfd_set_section_contents");
553 offset += d->length;
555 for (d = cwi.dirstrs.d; d != NULL; d = d->next)
557 if (! bfd_set_section_contents (abfd, sec, d->data, offset, d->length))
558 bfd_fatal ("bfd_set_section_contents");
559 offset += d->length;
561 for (d = cwi.dataents.d; d != NULL; d = d->next)
563 if (! bfd_set_section_contents (abfd, sec, d->data, offset, d->length))
564 bfd_fatal ("bfd_set_section_contents");
565 offset += d->length;
567 for (d = cwi.resources.d; d != NULL; d = d->next)
569 if (! bfd_set_section_contents (abfd, sec, d->data, offset, d->length))
570 bfd_fatal ("bfd_set_section_contents");
571 offset += d->length;
574 assert (offset == length);
576 if (! bfd_close (abfd))
577 bfd_fatal ("bfd_close");
579 /* We allocated the relocs array using malloc. */
580 free (cwi.relocs);
583 /* Work out the sizes of the various fixed size resource directory
584 entries. This updates fields in CWI. */
586 static void
587 coff_bin_sizes (resdir, cwi)
588 const struct res_directory *resdir;
589 struct coff_write_info *cwi;
591 const struct res_entry *re;
593 cwi->dirsize += sizeof (struct extern_res_directory);
595 for (re = resdir->entries; re != NULL; re = re->next)
597 cwi->dirsize += sizeof (struct extern_res_entry);
599 if (re->id.named)
600 cwi->dirstrsize += re->id.u.n.length * 2 + 2;
602 if (re->subdir)
603 coff_bin_sizes (re->u.dir, cwi);
604 else
605 cwi->dataentsize += sizeof (struct extern_res_data);
609 /* Allocate data for a particular list. */
611 static unsigned char *
612 coff_alloc (bb, size)
613 struct bindata_build *bb;
614 size_t size;
616 struct bindata *d;
618 d = (struct bindata *) reswr_alloc (sizeof *d);
620 d->next = NULL;
621 d->data = (unsigned char *) reswr_alloc (size);
622 d->length = size;
624 if (bb->d == NULL)
625 bb->d = d;
626 else
627 bb->last->next = d;
628 bb->last = d;
629 bb->length += size;
631 return d->data;
634 /* Convert the resource directory RESDIR to binary. */
636 static void
637 coff_to_bin (resdir, cwi)
638 const struct res_directory *resdir;
639 struct coff_write_info *cwi;
641 struct extern_res_directory *erd;
642 int ci, cn;
643 const struct res_entry *e;
644 struct extern_res_entry *ere;
646 /* Write out the directory table. */
648 erd = ((struct extern_res_directory *)
649 coff_alloc (&cwi->dirs, sizeof (*erd)));
651 putcwi_32 (cwi, resdir->characteristics, erd->characteristics);
652 putcwi_32 (cwi, resdir->time, erd->time);
653 putcwi_16 (cwi, resdir->major, erd->major);
654 putcwi_16 (cwi, resdir->minor, erd->minor);
656 ci = 0;
657 cn = 0;
658 for (e = resdir->entries; e != NULL; e = e->next)
660 if (e->id.named)
661 ++cn;
662 else
663 ++ci;
666 putcwi_16 (cwi, cn, erd->name_count);
667 putcwi_16 (cwi, ci, erd->id_count);
669 /* Write out the data entries. Note that we allocate space for all
670 the entries before writing them out. That permits a recursive
671 call to work correctly when writing out subdirectories. */
673 ere = ((struct extern_res_entry *)
674 coff_alloc (&cwi->dirs, (ci + cn) * sizeof (*ere)));
675 for (e = resdir->entries; e != NULL; e = e->next, ere++)
677 if (! e->id.named)
678 putcwi_32 (cwi, e->id.u.id, ere->name);
679 else
681 unsigned char *str;
682 int i;
684 /* For some reason existing files seem to have the high bit
685 set on the address of the name, although that is not
686 documented. */
687 putcwi_32 (cwi,
688 0x80000000 | (cwi->dirsize + cwi->dirstrs.length),
689 ere->name);
691 str = coff_alloc (&cwi->dirstrs, e->id.u.n.length * 2 + 2);
692 putcwi_16 (cwi, e->id.u.n.length, str);
693 for (i = 0; i < e->id.u.n.length; i++)
694 putcwi_16 (cwi, e->id.u.n.name[i], str + i * 2 + 2);
697 if (e->subdir)
699 putcwi_32 (cwi, 0x80000000 | cwi->dirs.length, ere->rva);
700 coff_to_bin (e->u.dir, cwi);
702 else
704 putcwi_32 (cwi,
705 cwi->dirsize + cwi->dirstrsize + cwi->dataents.length,
706 ere->rva);
708 coff_res_to_bin (e->u.res, cwi);
713 /* Convert the resource RES to binary. */
715 static void
716 coff_res_to_bin (res, cwi)
717 const struct res_resource *res;
718 struct coff_write_info *cwi;
720 arelent *r;
721 struct extern_res_data *erd;
722 struct bindata *d;
723 unsigned long length;
725 /* For some reason, although every other address is a section
726 offset, the address of the resource data itself is an RVA. That
727 means that we need to generate a relocation for it. We allocate
728 the relocs array using malloc so that we can use realloc. FIXME:
729 This relocation handling is correct for the i386, but probably
730 not for any other target. */
732 r = (arelent *) reswr_alloc (sizeof (arelent));
733 r->sym_ptr_ptr = cwi->sympp;
734 r->address = cwi->dirsize + cwi->dirstrsize + cwi->dataents.length;
735 r->addend = 0;
736 r->howto = bfd_reloc_type_lookup (cwi->abfd, BFD_RELOC_RVA);
737 if (r->howto == NULL)
738 bfd_fatal (_("can't get BFD_RELOC_RVA relocation type"));
740 cwi->relocs = xrealloc (cwi->relocs,
741 (cwi->reloc_count + 2) * sizeof (arelent *));
742 cwi->relocs[cwi->reloc_count] = r;
743 cwi->relocs[cwi->reloc_count + 1] = NULL;
744 ++cwi->reloc_count;
746 erd = (struct extern_res_data *) coff_alloc (&cwi->dataents, sizeof (*erd));
748 putcwi_32 (cwi,
749 (cwi->dirsize
750 + cwi->dirstrsize
751 + cwi->dataentsize
752 + cwi->resources.length),
753 erd->rva);
754 putcwi_32 (cwi, res->coff_info.codepage, erd->codepage);
755 putcwi_32 (cwi, res->coff_info.reserved, erd->reserved);
757 d = res_to_bin (res, cwi->big_endian);
759 if (cwi->resources.d == NULL)
760 cwi->resources.d = d;
761 else
762 cwi->resources.last->next = d;
764 length = 0;
765 for (; d->next != NULL; d = d->next)
766 length += d->length;
767 length += d->length;
768 cwi->resources.last = d;
769 cwi->resources.length += length;
771 putcwi_32 (cwi, length, erd->size);
773 /* Force the next resource to have 32 bit alignment. */
775 if ((length & 3) != 0)
777 int add;
778 unsigned char *ex;
780 add = 4 - (length & 3);
782 ex = coff_alloc (&cwi->resources, add);
783 memset (ex, 0, add);