1 /* BFD back-end for archive files (libraries).
2    Copyright (C) 1990-2016 Free Software Foundation, Inc.
3    Written by Cygnus Support.  Mostly Gumby Henkel-Wallace's fault.
4 
5    This file is part of BFD, the Binary File Descriptor library.
6 
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 3 of the License, or
10    (at your option) any later version.
11 
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.
16 
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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
20 
21 /*
22 @setfilename archive-info
23 SECTION
24 	Archives
25 
26 DESCRIPTION
27 	An archive (or library) is just another BFD.  It has a symbol
28 	table, although there's not much a user program will do with it.
29 
30 	The big difference between an archive BFD and an ordinary BFD
31 	is that the archive doesn't have sections.  Instead it has a
32 	chain of BFDs that are considered its contents.  These BFDs can
33 	be manipulated like any other.  The BFDs contained in an
34 	archive opened for reading will all be opened for reading.  You
35 	may put either input or output BFDs into an archive opened for
36 	output; they will be handled correctly when the archive is closed.
37 
38 	Use <<bfd_openr_next_archived_file>> to step through
39 	the contents of an archive opened for input.  You don't
40 	have to read the entire archive if you don't want
41 	to!  Read it until you find what you want.
42 
43 	A BFD returned by <<bfd_openr_next_archived_file>> can be
44 	closed manually with <<bfd_close>>.  If you do not close it,
45 	then a second iteration through the members of an archive may
46 	return the same BFD.  If you close the archive BFD, then all
47 	the member BFDs will automatically be closed as well.
48 
49 	Archive contents of output BFDs are chained through the
50 	<<archive_next>> pointer in a BFD.  The first one is findable
51 	through the <<archive_head>> slot of the archive.  Set it with
52 	<<bfd_set_archive_head>> (q.v.).  A given BFD may be in only
53 	one open output archive at a time.
54 
55 	As expected, the BFD archive code is more general than the
56 	archive code of any given environment.  BFD archives may
57 	contain files of different formats (e.g., a.out and coff) and
58 	even different architectures.  You may even place archives
59 	recursively into archives!
60 
61 	This can cause unexpected confusion, since some archive
62 	formats are more expressive than others.  For instance, Intel
63 	COFF archives can preserve long filenames; SunOS a.out archives
64 	cannot.  If you move a file from the first to the second
65 	format and back again, the filename may be truncated.
66 	Likewise, different a.out environments have different
67 	conventions as to how they truncate filenames, whether they
68 	preserve directory names in filenames, etc.  When
69 	interoperating with native tools, be sure your files are
70 	homogeneous.
71 
72 	Beware: most of these formats do not react well to the
73 	presence of spaces in filenames.  We do the best we can, but
74 	can't always handle this case due to restrictions in the format of
75 	archives.  Many Unix utilities are braindead in regards to
76 	spaces and such in filenames anyway, so this shouldn't be much
77 	of a restriction.
78 
79 	Archives are supported in BFD in <<archive.c>>.
80 
81 SUBSECTION
82 	Archive functions
83 */
84 
85 /* Assumes:
86    o - all archive elements start on an even boundary, newline padded;
87    o - all arch headers are char *;
88    o - all arch headers are the same size (across architectures).
89 */
90 
91 /* Some formats provide a way to cram a long filename into the short
92    (16 chars) space provided by a BSD archive.  The trick is: make a
93    special "file" in the front of the archive, sort of like the SYMDEF
94    entry.  If the filename is too long to fit, put it in the extended
95    name table, and use its index as the filename.  To prevent
96    confusion prepend the index with a space.  This means you can't
97    have filenames that start with a space, but then again, many Unix
98    utilities can't handle that anyway.
99 
100    This scheme unfortunately requires that you stand on your head in
101    order to write an archive since you need to put a magic file at the
102    front, and need to touch every entry to do so.  C'est la vie.
103 
104    We support two variants of this idea:
105    The SVR4 format (extended name table is named "//"),
106    and an extended pseudo-BSD variant (extended name table is named
107    "ARFILENAMES/").  The origin of the latter format is uncertain.
108 
109    BSD 4.4 uses a third scheme:  It writes a long filename
110    directly after the header.  This allows 'ar q' to work.
111 */
112 
113 /* Summary of archive member names:
114 
115  Symbol table (must be first):
116  "__.SYMDEF       " - Symbol table, Berkeley style, produced by ranlib.
117  "/               " - Symbol table, system 5 style.
118 
119  Long name table (must be before regular file members):
120  "//              " - Long name table, System 5 R4 style.
121  "ARFILENAMES/    " - Long name table, non-standard extended BSD (not BSD 4.4).
122 
123  Regular file members with short names:
124  "filename.o/     " - Regular file, System 5 style (embedded spaces ok).
125  "filename.o      " - Regular file, Berkeley style (no embedded spaces).
126 
127  Regular files with long names (or embedded spaces, for BSD variants):
128  "/18             " - SVR4 style, name at offset 18 in name table.
129  "#1/23           " - Long name (or embedded spaces) 23 characters long,
130 		      BSD 4.4 style, full name follows header.
131  " 18             " - Long name 18 characters long, extended pseudo-BSD.
132  */
133 
134 #include "sysdep.h"
135 #include "bfd.h"
136 #include "libiberty.h"
137 #include "libbfd.h"
138 #include "aout/ar.h"
139 #include "aout/ranlib.h"
140 #include "safe-ctype.h"
141 #include "hashtab.h"
142 #include "filenames.h"
143 #include "bfdlink.h"
144 
145 #ifndef errno
146 extern int errno;
147 #endif
148 
149 /* We keep a cache of archive filepointers to archive elements to
150    speed up searching the archive by filepos.  We only add an entry to
151    the cache when we actually read one.  We also don't sort the cache;
152    it's generally short enough to search linearly.
153    Note that the pointers here point to the front of the ar_hdr, not
154    to the front of the contents!  */
155 struct ar_cache
156 {
157   file_ptr ptr;
158   bfd *arbfd;
159 };
160 
161 #define ar_padchar(abfd) ((abfd)->xvec->ar_pad_char)
162 #define ar_maxnamelen(abfd) ((abfd)->xvec->ar_max_namelen)
163 
164 #define arch_eltdata(bfd) ((struct areltdata *) ((bfd)->arelt_data))
165 #define arch_hdr(bfd) ((struct ar_hdr *) arch_eltdata (bfd)->arch_header)
166 
167 /* True iff NAME designated a BSD 4.4 extended name.  */
168 
169 #define is_bsd44_extended_name(NAME) \
170   (NAME[0] == '#'  && NAME[1] == '1' && NAME[2] == '/' && ISDIGIT (NAME[3]))
171 
172 void
_bfd_ar_spacepad(char * p,size_t n,const char * fmt,long val)173 _bfd_ar_spacepad (char *p, size_t n, const char *fmt, long val)
174 {
175   static char buf[20];
176   size_t len;
177 
178   snprintf (buf, sizeof (buf), fmt, val);
179   len = strlen (buf);
180   if (len < n)
181     {
182       memcpy (p, buf, len);
183       memset (p + len, ' ', n - len);
184     }
185   else
186     memcpy (p, buf, n);
187 }
188 
189 bfd_boolean
_bfd_ar_sizepad(char * p,size_t n,bfd_size_type size)190 _bfd_ar_sizepad (char *p, size_t n, bfd_size_type size)
191 {
192   static char buf[21];
193   size_t len;
194 
195   snprintf (buf, sizeof (buf), "%-10" BFD_VMA_FMT "u", size);
196   len = strlen (buf);
197   if (len > n)
198     {
199       bfd_set_error (bfd_error_file_too_big);
200       return FALSE;
201     }
202   if (len < n)
203     {
204       memcpy (p, buf, len);
205       memset (p + len, ' ', n - len);
206     }
207   else
208     memcpy (p, buf, n);
209   return TRUE;
210 }
211 
212 bfd_boolean
_bfd_generic_mkarchive(bfd * abfd)213 _bfd_generic_mkarchive (bfd *abfd)
214 {
215   bfd_size_type amt = sizeof (struct artdata);
216 
217   abfd->tdata.aout_ar_data = (struct artdata *) bfd_zalloc (abfd, amt);
218   if (bfd_ardata (abfd) == NULL)
219     return FALSE;
220 
221   /* Already cleared by bfd_zalloc above.
222      bfd_ardata (abfd)->cache = NULL;
223      bfd_ardata (abfd)->archive_head = NULL;
224      bfd_ardata (abfd)->symdefs = NULL;
225      bfd_ardata (abfd)->extended_names = NULL;
226      bfd_ardata (abfd)->extended_names_size = 0;
227      bfd_ardata (abfd)->tdata = NULL;  */
228 
229   return TRUE;
230 }
231 
232 /*
233 FUNCTION
234 	bfd_get_next_mapent
235 
236 SYNOPSIS
237 	symindex bfd_get_next_mapent
238 	  (bfd *abfd, symindex previous, carsym **sym);
239 
240 DESCRIPTION
241 	Step through archive @var{abfd}'s symbol table (if it
242 	has one).  Successively update @var{sym} with the next symbol's
243 	information, returning that symbol's (internal) index into the
244 	symbol table.
245 
246 	Supply <<BFD_NO_MORE_SYMBOLS>> as the @var{previous} entry to get
247 	the first one; returns <<BFD_NO_MORE_SYMBOLS>> when you've already
248 	got the last one.
249 
250 	A <<carsym>> is a canonical archive symbol.  The only
251 	user-visible element is its name, a null-terminated string.
252 */
253 
254 symindex
bfd_get_next_mapent(bfd * abfd,symindex prev,carsym ** entry)255 bfd_get_next_mapent (bfd *abfd, symindex prev, carsym **entry)
256 {
257   if (!bfd_has_map (abfd))
258     {
259       bfd_set_error (bfd_error_invalid_operation);
260       return BFD_NO_MORE_SYMBOLS;
261     }
262 
263   if (prev == BFD_NO_MORE_SYMBOLS)
264     prev = 0;
265   else
266     ++prev;
267   if (prev >= bfd_ardata (abfd)->symdef_count)
268     return BFD_NO_MORE_SYMBOLS;
269 
270   *entry = (bfd_ardata (abfd)->symdefs + prev);
271   return prev;
272 }
273 
274 /* To be called by backends only.  */
275 
276 bfd *
_bfd_create_empty_archive_element_shell(bfd * obfd)277 _bfd_create_empty_archive_element_shell (bfd *obfd)
278 {
279   return _bfd_new_bfd_contained_in (obfd);
280 }
281 
282 /*
283 FUNCTION
284 	bfd_set_archive_head
285 
286 SYNOPSIS
287 	bfd_boolean bfd_set_archive_head (bfd *output, bfd *new_head);
288 
289 DESCRIPTION
290 	Set the head of the chain of
291 	BFDs contained in the archive @var{output} to @var{new_head}.
292 */
293 
294 bfd_boolean
bfd_set_archive_head(bfd * output_archive,bfd * new_head)295 bfd_set_archive_head (bfd *output_archive, bfd *new_head)
296 {
297   output_archive->archive_head = new_head;
298   return TRUE;
299 }
300 
301 bfd *
_bfd_look_for_bfd_in_cache(bfd * arch_bfd,file_ptr filepos)302 _bfd_look_for_bfd_in_cache (bfd *arch_bfd, file_ptr filepos)
303 {
304   htab_t hash_table = bfd_ardata (arch_bfd)->cache;
305   struct ar_cache m;
306 
307   m.ptr = filepos;
308 
309   if (hash_table)
310     {
311       struct ar_cache *entry = (struct ar_cache *) htab_find (hash_table, &m);
312       if (!entry)
313 	return NULL;
314 
315       /* Unfortunately this flag is set after checking that we have
316 	 an archive, and checking for an archive means one element has
317 	 sneaked into the cache.  */
318       entry->arbfd->no_export = arch_bfd->no_export;
319       return entry->arbfd;
320     }
321   else
322     return NULL;
323 }
324 
325 static hashval_t
hash_file_ptr(const void * p)326 hash_file_ptr (const void * p)
327 {
328   return (hashval_t) (((struct ar_cache *) p)->ptr);
329 }
330 
331 /* Returns non-zero if P1 and P2 are equal.  */
332 
333 static int
eq_file_ptr(const void * p1,const void * p2)334 eq_file_ptr (const void * p1, const void * p2)
335 {
336   struct ar_cache *arc1 = (struct ar_cache *) p1;
337   struct ar_cache *arc2 = (struct ar_cache *) p2;
338   return arc1->ptr == arc2->ptr;
339 }
340 
341 /* The calloc function doesn't always take size_t (e.g. on VMS)
342    so wrap it to avoid a compile time warning.   */
343 
344 static void *
_bfd_calloc_wrapper(size_t a,size_t b)345 _bfd_calloc_wrapper (size_t a, size_t b)
346 {
347   return calloc (a, b);
348 }
349 
350 /* Kind of stupid to call cons for each one, but we don't do too many.  */
351 
352 bfd_boolean
_bfd_add_bfd_to_archive_cache(bfd * arch_bfd,file_ptr filepos,bfd * new_elt)353 _bfd_add_bfd_to_archive_cache (bfd *arch_bfd, file_ptr filepos, bfd *new_elt)
354 {
355   struct ar_cache *cache;
356   htab_t hash_table = bfd_ardata (arch_bfd)->cache;
357 
358   /* If the hash table hasn't been created, create it.  */
359   if (hash_table == NULL)
360     {
361       hash_table = htab_create_alloc (16, hash_file_ptr, eq_file_ptr,
362 				      NULL, _bfd_calloc_wrapper, free);
363       if (hash_table == NULL)
364 	return FALSE;
365       bfd_ardata (arch_bfd)->cache = hash_table;
366     }
367 
368   /* Insert new_elt into the hash table by filepos.  */
369   cache = (struct ar_cache *) bfd_zalloc (arch_bfd, sizeof (struct ar_cache));
370   cache->ptr = filepos;
371   cache->arbfd = new_elt;
372   *htab_find_slot (hash_table, (const void *) cache, INSERT) = cache;
373 
374   /* Provide a means of accessing this from child.  */
375   arch_eltdata (new_elt)->parent_cache = hash_table;
376   arch_eltdata (new_elt)->key = filepos;
377 
378   return TRUE;
379 }
380 
381 static bfd *
open_nested_file(const char * filename,bfd * archive)382 open_nested_file (const char *filename, bfd *archive)
383 {
384   const char *target;
385   bfd *n_bfd;
386 
387   target = NULL;
388   if (!archive->target_defaulted)
389     target = archive->xvec->name;
390   n_bfd = bfd_openr (filename, target);
391   if (n_bfd != NULL)
392     {
393       n_bfd->lto_output = archive->lto_output;
394       n_bfd->no_export = archive->no_export;
395       n_bfd->my_archive = archive;
396     }
397   return n_bfd;
398 }
399 
400 static bfd *
find_nested_archive(const char * filename,bfd * arch_bfd)401 find_nested_archive (const char *filename, bfd *arch_bfd)
402 {
403   bfd *abfd;
404 
405   /* PR 15140: Don't allow a nested archive pointing to itself.  */
406   if (filename_cmp (filename, arch_bfd->filename) == 0)
407     {
408       bfd_set_error (bfd_error_malformed_archive);
409       return NULL;
410     }
411 
412   for (abfd = arch_bfd->nested_archives;
413        abfd != NULL;
414        abfd = abfd->archive_next)
415     {
416       if (filename_cmp (filename, abfd->filename) == 0)
417 	return abfd;
418     }
419   abfd = open_nested_file (filename, arch_bfd);
420   if (abfd)
421     {
422       abfd->archive_next = arch_bfd->nested_archives;
423       arch_bfd->nested_archives = abfd;
424     }
425   return abfd;
426 }
427 
428 /* The name begins with space.  Hence the rest of the name is an index into
429    the string table.  */
430 
431 static char *
get_extended_arelt_filename(bfd * arch,const char * name,file_ptr * originp)432 get_extended_arelt_filename (bfd *arch, const char *name, file_ptr *originp)
433 {
434   unsigned long table_index = 0;
435   const char *endp;
436 
437   /* Should extract string so that I can guarantee not to overflow into
438      the next region, but I'm too lazy.  */
439   errno = 0;
440   /* Skip first char, which is '/' in SVR4 or ' ' in some other variants.  */
441   table_index = strtol (name + 1, (char **) &endp, 10);
442   if (errno != 0 || table_index >= bfd_ardata (arch)->extended_names_size)
443     {
444       bfd_set_error (bfd_error_malformed_archive);
445       return NULL;
446     }
447   /* In a thin archive, a member of an archive-within-an-archive
448      will have the offset in the inner archive encoded here.  */
449   if (bfd_is_thin_archive (arch) && endp != NULL && *endp == ':')
450     {
451       file_ptr origin = strtol (endp + 1, NULL, 10);
452 
453       if (errno != 0)
454 	{
455 	  bfd_set_error (bfd_error_malformed_archive);
456 	  return NULL;
457 	}
458       *originp = origin;
459     }
460   else
461     *originp = 0;
462 
463   return bfd_ardata (arch)->extended_names + table_index;
464 }
465 
466 /* This functions reads an arch header and returns an areltdata pointer, or
467    NULL on error.
468 
469    Presumes the file pointer is already in the right place (ie pointing
470    to the ar_hdr in the file).   Moves the file pointer; on success it
471    should be pointing to the front of the file contents; on failure it
472    could have been moved arbitrarily.  */
473 
474 void *
_bfd_generic_read_ar_hdr(bfd * abfd)475 _bfd_generic_read_ar_hdr (bfd *abfd)
476 {
477   return _bfd_generic_read_ar_hdr_mag (abfd, NULL);
478 }
479 
480 /* Alpha ECOFF uses an optional different ARFMAG value, so we have a
481    variant of _bfd_generic_read_ar_hdr which accepts a magic string.  */
482 
483 void *
_bfd_generic_read_ar_hdr_mag(bfd * abfd,const char * mag)484 _bfd_generic_read_ar_hdr_mag (bfd *abfd, const char *mag)
485 {
486   struct ar_hdr hdr;
487   char *hdrp = (char *) &hdr;
488   bfd_size_type parsed_size;
489   struct areltdata *ared;
490   char *filename = NULL;
491   bfd_size_type namelen = 0;
492   bfd_size_type allocsize = sizeof (struct areltdata) + sizeof (struct ar_hdr);
493   char *allocptr = 0;
494   file_ptr origin = 0;
495   unsigned int extra_size = 0;
496   char fmag_save;
497   int scan;
498 
499   if (bfd_bread (hdrp, sizeof (struct ar_hdr), abfd) != sizeof (struct ar_hdr))
500     {
501       if (bfd_get_error () != bfd_error_system_call)
502 	bfd_set_error (bfd_error_no_more_archived_files);
503       return NULL;
504     }
505   if (strncmp (hdr.ar_fmag, ARFMAG, 2) != 0
506       && (mag == NULL
507 	  || strncmp (hdr.ar_fmag, mag, 2) != 0))
508     {
509       bfd_set_error (bfd_error_malformed_archive);
510       return NULL;
511     }
512 
513   errno = 0;
514   fmag_save = hdr.ar_fmag[0];
515   hdr.ar_fmag[0] = 0;
516   scan = sscanf (hdr.ar_size, "%" BFD_VMA_FMT "u", &parsed_size);
517   hdr.ar_fmag[0] = fmag_save;
518   if (scan != 1)
519     {
520       bfd_set_error (bfd_error_malformed_archive);
521       return NULL;
522     }
523 
524   /* Extract the filename from the archive - there are two ways to
525      specify an extended name table, either the first char of the
526      name is a space, or it's a slash.  */
527   if ((hdr.ar_name[0] == '/'
528        || (hdr.ar_name[0] == ' '
529 	   && memchr (hdr.ar_name, '/', ar_maxnamelen (abfd)) == NULL))
530       && bfd_ardata (abfd)->extended_names != NULL)
531     {
532       filename = get_extended_arelt_filename (abfd, hdr.ar_name, &origin);
533       if (filename == NULL)
534 	return NULL;
535     }
536   /* BSD4.4-style long filename.  */
537   else if (is_bsd44_extended_name (hdr.ar_name))
538     {
539       /* BSD-4.4 extended name */
540       namelen = atoi (&hdr.ar_name[3]);
541       allocsize += namelen + 1;
542       parsed_size -= namelen;
543       extra_size = namelen;
544 
545       allocptr = (char *) bfd_zmalloc (allocsize);
546       if (allocptr == NULL)
547 	return NULL;
548       filename = (allocptr
549 		  + sizeof (struct areltdata)
550 		  + sizeof (struct ar_hdr));
551       if (bfd_bread (filename, namelen, abfd) != namelen)
552 	{
553 	  free (allocptr);
554 	  if (bfd_get_error () != bfd_error_system_call)
555 	    bfd_set_error (bfd_error_no_more_archived_files);
556 	  return NULL;
557 	}
558       filename[namelen] = '\0';
559     }
560   else
561     {
562       /* We judge the end of the name by looking for '/' or ' '.
563 	 Note:  The SYSV format (terminated by '/') allows embedded
564 	 spaces, so only look for ' ' if we don't find '/'.  */
565 
566       char *e;
567       e = (char *) memchr (hdr.ar_name, '\0', ar_maxnamelen (abfd));
568       if (e == NULL)
569 	{
570 	  e = (char *) memchr (hdr.ar_name, '/', ar_maxnamelen (abfd));
571 	  if (e == NULL)
572 	    e = (char *) memchr (hdr.ar_name, ' ', ar_maxnamelen (abfd));
573 	}
574 
575       if (e != NULL)
576 	namelen = e - hdr.ar_name;
577       else
578 	{
579 	  /* If we didn't find a termination character, then the name
580 	     must be the entire field.  */
581 	  namelen = ar_maxnamelen (abfd);
582 	}
583 
584       allocsize += namelen + 1;
585     }
586 
587   if (!allocptr)
588     {
589       allocptr = (char *) bfd_zmalloc (allocsize);
590       if (allocptr == NULL)
591 	return NULL;
592     }
593 
594   ared = (struct areltdata *) allocptr;
595 
596   ared->arch_header = allocptr + sizeof (struct areltdata);
597   memcpy (ared->arch_header, &hdr, sizeof (struct ar_hdr));
598   ared->parsed_size = parsed_size;
599   ared->extra_size = extra_size;
600   ared->origin = origin;
601 
602   if (filename != NULL)
603     ared->filename = filename;
604   else
605     {
606       ared->filename = allocptr + (sizeof (struct areltdata) +
607 				   sizeof (struct ar_hdr));
608       if (namelen)
609 	memcpy (ared->filename, hdr.ar_name, namelen);
610       ared->filename[namelen] = '\0';
611     }
612 
613   return ared;
614 }
615 
616 /* Append the relative pathname for a member of the thin archive
617    to the pathname of the directory containing the archive.  */
618 
619 char *
_bfd_append_relative_path(bfd * arch,char * elt_name)620 _bfd_append_relative_path (bfd *arch, char *elt_name)
621 {
622   const char *arch_name = arch->filename;
623   const char *base_name = lbasename (arch_name);
624   size_t prefix_len;
625   char *filename;
626 
627   if (base_name == arch_name)
628     return elt_name;
629 
630   prefix_len = base_name - arch_name;
631   filename = (char *) bfd_alloc (arch, prefix_len + strlen (elt_name) + 1);
632   if (filename == NULL)
633     return NULL;
634 
635   strncpy (filename, arch_name, prefix_len);
636   strcpy (filename + prefix_len, elt_name);
637   return filename;
638 }
639 
640 /* This is an internal function; it's mainly used when indexing
641    through the archive symbol table, but also used to get the next
642    element, since it handles the bookkeeping so nicely for us.  */
643 
644 bfd *
_bfd_get_elt_at_filepos(bfd * archive,file_ptr filepos)645 _bfd_get_elt_at_filepos (bfd *archive, file_ptr filepos)
646 {
647   struct areltdata *new_areldata;
648   bfd *n_bfd;
649   char *filename;
650 
651   n_bfd = _bfd_look_for_bfd_in_cache (archive, filepos);
652   if (n_bfd)
653     return n_bfd;
654 
655   if (0 > bfd_seek (archive, filepos, SEEK_SET))
656     return NULL;
657 
658   if ((new_areldata = (struct areltdata *) _bfd_read_ar_hdr (archive)) == NULL)
659     return NULL;
660 
661   filename = new_areldata->filename;
662 
663   if (bfd_is_thin_archive (archive))
664     {
665       /* This is a proxy entry for an external file.  */
666       if (! IS_ABSOLUTE_PATH (filename))
667 	{
668 	  filename = _bfd_append_relative_path (archive, filename);
669 	  if (filename == NULL)
670 	    {
671 	      free (new_areldata);
672 	      return NULL;
673 	    }
674 	}
675 
676       if (new_areldata->origin > 0)
677 	{
678 	  /* This proxy entry refers to an element of a nested archive.
679 	     Locate the member of that archive and return a bfd for it.  */
680 	  bfd *ext_arch = find_nested_archive (filename, archive);
681 
682 	  if (ext_arch == NULL
683 	      || ! bfd_check_format (ext_arch, bfd_archive))
684 	    {
685 	      free (new_areldata);
686 	      return NULL;
687 	    }
688 	  n_bfd = _bfd_get_elt_at_filepos (ext_arch, new_areldata->origin);
689 	  if (n_bfd == NULL)
690 	    {
691 	      free (new_areldata);
692 	      return NULL;
693 	    }
694 	  n_bfd->proxy_origin = bfd_tell (archive);
695 	  return n_bfd;
696 	}
697 
698       /* It's not an element of a nested archive;
699 	 open the external file as a bfd.  */
700       n_bfd = open_nested_file (filename, archive);
701       if (n_bfd == NULL)
702 	bfd_set_error (bfd_error_malformed_archive);
703     }
704   else
705     {
706       n_bfd = _bfd_create_empty_archive_element_shell (archive);
707     }
708 
709   if (n_bfd == NULL)
710     {
711       free (new_areldata);
712       return NULL;
713     }
714 
715   n_bfd->proxy_origin = bfd_tell (archive);
716 
717   if (bfd_is_thin_archive (archive))
718     {
719       n_bfd->origin = 0;
720     }
721   else
722     {
723       n_bfd->origin = n_bfd->proxy_origin;
724       n_bfd->filename = xstrdup (filename);
725     }
726 
727   n_bfd->arelt_data = new_areldata;
728 
729   /* Copy BFD_COMPRESS, BFD_DECOMPRESS and BFD_COMPRESS_GABI flags.  */
730   n_bfd->flags |= archive->flags & (BFD_COMPRESS
731 				    | BFD_DECOMPRESS
732 				    | BFD_COMPRESS_GABI);
733 
734   /* Copy is_linker_input.  */
735   n_bfd->is_linker_input = archive->is_linker_input;
736 
737   if (_bfd_add_bfd_to_archive_cache (archive, filepos, n_bfd))
738     return n_bfd;
739 
740   free (new_areldata);
741   n_bfd->arelt_data = NULL;
742   return NULL;
743 }
744 
745 /* Return the BFD which is referenced by the symbol in ABFD indexed by
746    SYM_INDEX.  SYM_INDEX should have been returned by bfd_get_next_mapent.  */
747 
748 bfd *
_bfd_generic_get_elt_at_index(bfd * abfd,symindex sym_index)749 _bfd_generic_get_elt_at_index (bfd *abfd, symindex sym_index)
750 {
751   carsym *entry;
752 
753   entry = bfd_ardata (abfd)->symdefs + sym_index;
754   return _bfd_get_elt_at_filepos (abfd, entry->file_offset);
755 }
756 
757 /*
758 FUNCTION
759 	bfd_openr_next_archived_file
760 
761 SYNOPSIS
762 	bfd *bfd_openr_next_archived_file (bfd *archive, bfd *previous);
763 
764 DESCRIPTION
765 	Provided a BFD, @var{archive}, containing an archive and NULL, open
766 	an input BFD on the first contained element and returns that.
767 	Subsequent calls should pass
768 	the archive and the previous return value to return a created
769 	BFD to the next contained element. NULL is returned when there
770 	are no more.
771 */
772 
773 bfd *
bfd_openr_next_archived_file(bfd * archive,bfd * last_file)774 bfd_openr_next_archived_file (bfd *archive, bfd *last_file)
775 {
776   if ((bfd_get_format (archive) != bfd_archive)
777       || (archive->direction == write_direction))
778     {
779       bfd_set_error (bfd_error_invalid_operation);
780       return NULL;
781     }
782 
783   return BFD_SEND (archive,
784 		   openr_next_archived_file, (archive, last_file));
785 }
786 
787 bfd *
bfd_generic_openr_next_archived_file(bfd * archive,bfd * last_file)788 bfd_generic_openr_next_archived_file (bfd *archive, bfd *last_file)
789 {
790   ufile_ptr filestart;
791 
792   if (!last_file)
793     filestart = bfd_ardata (archive)->first_file_filepos;
794   else
795     {
796       filestart = last_file->proxy_origin;
797       if (! bfd_is_thin_archive (archive))
798 	{
799 	  bfd_size_type size = arelt_size (last_file);
800 
801 	  filestart += size;
802 	  /* Pad to an even boundary...
803 	     Note that last_file->origin can be odd in the case of
804 	     BSD-4.4-style element with a long odd size.  */
805 	  filestart += filestart % 2;
806 	  if (filestart < last_file->proxy_origin)
807 	    {
808 	      /* Prevent looping.  See PR19256.  */
809 	      bfd_set_error (bfd_error_malformed_archive);
810 	      return NULL;
811 	    }
812 	}
813     }
814 
815   return _bfd_get_elt_at_filepos (archive, filestart);
816 }
817 
818 const bfd_target *
bfd_generic_archive_p(bfd * abfd)819 bfd_generic_archive_p (bfd *abfd)
820 {
821   struct artdata *tdata_hold;
822   char armag[SARMAG + 1];
823   bfd_size_type amt;
824 
825   if (bfd_bread (armag, SARMAG, abfd) != SARMAG)
826     {
827       if (bfd_get_error () != bfd_error_system_call)
828 	bfd_set_error (bfd_error_wrong_format);
829       return NULL;
830     }
831 
832   bfd_is_thin_archive (abfd) = (strncmp (armag, ARMAGT, SARMAG) == 0);
833 
834   if (strncmp (armag, ARMAG, SARMAG) != 0
835       && strncmp (armag, ARMAGB, SARMAG) != 0
836       && ! bfd_is_thin_archive (abfd))
837     return NULL;
838 
839   tdata_hold = bfd_ardata (abfd);
840 
841   amt = sizeof (struct artdata);
842   bfd_ardata (abfd) = (struct artdata *) bfd_zalloc (abfd, amt);
843   if (bfd_ardata (abfd) == NULL)
844     {
845       bfd_ardata (abfd) = tdata_hold;
846       return NULL;
847     }
848 
849   bfd_ardata (abfd)->first_file_filepos = SARMAG;
850   /* Cleared by bfd_zalloc above.
851      bfd_ardata (abfd)->cache = NULL;
852      bfd_ardata (abfd)->archive_head = NULL;
853      bfd_ardata (abfd)->symdefs = NULL;
854      bfd_ardata (abfd)->extended_names = NULL;
855      bfd_ardata (abfd)->extended_names_size = 0;
856      bfd_ardata (abfd)->tdata = NULL;  */
857 
858   if (!BFD_SEND (abfd, _bfd_slurp_armap, (abfd))
859       || !BFD_SEND (abfd, _bfd_slurp_extended_name_table, (abfd)))
860     {
861       if (bfd_get_error () != bfd_error_system_call)
862 	bfd_set_error (bfd_error_wrong_format);
863       bfd_release (abfd, bfd_ardata (abfd));
864       bfd_ardata (abfd) = tdata_hold;
865       return NULL;
866     }
867 
868   if (abfd->target_defaulted && bfd_has_map (abfd))
869     {
870       bfd *first;
871 
872       /* This archive has a map, so we may presume that the contents
873 	 are object files.  Make sure that if the first file in the
874 	 archive can be recognized as an object file, it is for this
875 	 target.  If not, assume that this is the wrong format.  If
876 	 the first file is not an object file, somebody is doing
877 	 something weird, and we permit it so that ar -t will work.
878 
879 	 This is done because any normal format will recognize any
880 	 normal archive, regardless of the format of the object files.
881 	 We do accept an empty archive.  */
882 
883       first = bfd_openr_next_archived_file (abfd, NULL);
884       if (first != NULL)
885 	{
886 	  first->target_defaulted = FALSE;
887 	  if (bfd_check_format (first, bfd_object)
888 	      && first->xvec != abfd->xvec)
889 	    bfd_set_error (bfd_error_wrong_object_format);
890 	  /* And we ought to close `first' here too.  */
891 	}
892     }
893 
894   return abfd->xvec;
895 }
896 
897 /* Some constants for a 32 bit BSD archive structure.  We do not
898    support 64 bit archives presently; so far as I know, none actually
899    exist.  Supporting them would require changing these constants, and
900    changing some H_GET_32 to H_GET_64.  */
901 
902 /* The size of an external symdef structure.  */
903 #define BSD_SYMDEF_SIZE 8
904 
905 /* The offset from the start of a symdef structure to the file offset.  */
906 #define BSD_SYMDEF_OFFSET_SIZE 4
907 
908 /* The size of the symdef count.  */
909 #define BSD_SYMDEF_COUNT_SIZE 4
910 
911 /* The size of the string count.  */
912 #define BSD_STRING_COUNT_SIZE 4
913 
914 /* Read a BSD-style archive symbol table.  Returns FALSE on error,
915    TRUE otherwise.  */
916 
917 static bfd_boolean
do_slurp_bsd_armap(bfd * abfd)918 do_slurp_bsd_armap (bfd *abfd)
919 {
920   struct areltdata *mapdata;
921   unsigned int counter;
922   bfd_byte *raw_armap, *rbase;
923   struct artdata *ardata = bfd_ardata (abfd);
924   char *stringbase;
925   bfd_size_type parsed_size, amt;
926   carsym *set;
927 
928   mapdata = (struct areltdata *) _bfd_read_ar_hdr (abfd);
929   if (mapdata == NULL)
930     return FALSE;
931   parsed_size = mapdata->parsed_size;
932   free (mapdata);
933   /* PR 17512: file: 883ff754.  */
934   /* PR 17512: file: 0458885f.  */
935   if (parsed_size < 4)
936     return FALSE;
937 
938   raw_armap = (bfd_byte *) bfd_zalloc (abfd, parsed_size);
939   if (raw_armap == NULL)
940     return FALSE;
941 
942   if (bfd_bread (raw_armap, parsed_size, abfd) != parsed_size)
943     {
944       if (bfd_get_error () != bfd_error_system_call)
945 	bfd_set_error (bfd_error_malformed_archive);
946     byebye:
947       bfd_release (abfd, raw_armap);
948       return FALSE;
949     }
950 
951   ardata->symdef_count = H_GET_32 (abfd, raw_armap) / BSD_SYMDEF_SIZE;
952   if (ardata->symdef_count * BSD_SYMDEF_SIZE >
953       parsed_size - BSD_SYMDEF_COUNT_SIZE)
954     {
955       /* Probably we're using the wrong byte ordering.  */
956       bfd_set_error (bfd_error_wrong_format);
957       goto byebye;
958     }
959 
960   ardata->cache = 0;
961   rbase = raw_armap + BSD_SYMDEF_COUNT_SIZE;
962   stringbase = ((char *) rbase
963 		+ ardata->symdef_count * BSD_SYMDEF_SIZE
964 		+ BSD_STRING_COUNT_SIZE);
965   amt = ardata->symdef_count * sizeof (carsym);
966   ardata->symdefs = (struct carsym *) bfd_alloc (abfd, amt);
967   if (!ardata->symdefs)
968     return FALSE;
969 
970   for (counter = 0, set = ardata->symdefs;
971        counter < ardata->symdef_count;
972        counter++, set++, rbase += BSD_SYMDEF_SIZE)
973     {
974       set->name = H_GET_32 (abfd, rbase) + stringbase;
975       set->file_offset = H_GET_32 (abfd, rbase + BSD_SYMDEF_OFFSET_SIZE);
976     }
977 
978   ardata->first_file_filepos = bfd_tell (abfd);
979   /* Pad to an even boundary if you have to.  */
980   ardata->first_file_filepos += (ardata->first_file_filepos) % 2;
981   /* FIXME, we should provide some way to free raw_ardata when
982      we are done using the strings from it.  For now, it seems
983      to be allocated on an objalloc anyway...  */
984   bfd_has_map (abfd) = TRUE;
985   return TRUE;
986 }
987 
988 /* Read a COFF archive symbol table.  Returns FALSE on error, TRUE
989    otherwise.  */
990 
991 static bfd_boolean
do_slurp_coff_armap(bfd * abfd)992 do_slurp_coff_armap (bfd *abfd)
993 {
994   struct areltdata *mapdata;
995   int *raw_armap, *rawptr;
996   struct artdata *ardata = bfd_ardata (abfd);
997   char *stringbase;
998   bfd_size_type stringsize;
999   bfd_size_type parsed_size;
1000   carsym *carsyms;
1001   bfd_size_type nsymz;		/* Number of symbols in armap.  */
1002   bfd_vma (*swap) (const void *);
1003   char int_buf[sizeof (long)];
1004   bfd_size_type carsym_size, ptrsize;
1005   unsigned int i;
1006 
1007   mapdata = (struct areltdata *) _bfd_read_ar_hdr (abfd);
1008   if (mapdata == NULL)
1009     return FALSE;
1010   parsed_size = mapdata->parsed_size;
1011   free (mapdata);
1012 
1013   if (bfd_bread (int_buf, 4, abfd) != 4)
1014     {
1015       if (bfd_get_error () != bfd_error_system_call)
1016 	bfd_set_error (bfd_error_malformed_archive);
1017       return FALSE;
1018     }
1019   /* It seems that all numeric information in a coff archive is always
1020      in big endian format, nomatter the host or target.  */
1021   swap = bfd_getb32;
1022   nsymz = bfd_getb32 (int_buf);
1023   stringsize = parsed_size - (4 * nsymz) - 4;
1024 
1025   /* ... except that some archive formats are broken, and it may be our
1026      fault - the i960 little endian coff sometimes has big and sometimes
1027      little, because our tools changed.  Here's a horrible hack to clean
1028      up the crap.  */
1029 
1030   if (stringsize > 0xfffff
1031       && bfd_get_arch (abfd) == bfd_arch_i960
1032       && bfd_get_flavour (abfd) == bfd_target_coff_flavour)
1033     {
1034       /* This looks dangerous, let's do it the other way around.  */
1035       nsymz = bfd_getl32 (int_buf);
1036       stringsize = parsed_size - (4 * nsymz) - 4;
1037       swap = bfd_getl32;
1038     }
1039 
1040   /* The coff armap must be read sequentially.  So we construct a
1041      bsd-style one in core all at once, for simplicity.  */
1042 
1043   if (nsymz > ~ (bfd_size_type) 0 / sizeof (carsym))
1044     return FALSE;
1045 
1046   carsym_size = (nsymz * sizeof (carsym));
1047   ptrsize = (4 * nsymz);
1048 
1049   if (carsym_size + stringsize + 1 <= carsym_size)
1050     return FALSE;
1051 
1052   ardata->symdefs = (struct carsym *) bfd_zalloc (abfd,
1053 						  carsym_size + stringsize + 1);
1054   if (ardata->symdefs == NULL)
1055     return FALSE;
1056   carsyms = ardata->symdefs;
1057   stringbase = ((char *) ardata->symdefs) + carsym_size;
1058 
1059   /* Allocate and read in the raw offsets.  */
1060   raw_armap = (int *) bfd_alloc (abfd, ptrsize);
1061   if (raw_armap == NULL)
1062     goto release_symdefs;
1063   if (bfd_bread (raw_armap, ptrsize, abfd) != ptrsize
1064       || (bfd_bread (stringbase, stringsize, abfd) != stringsize))
1065     {
1066       if (bfd_get_error () != bfd_error_system_call)
1067 	bfd_set_error (bfd_error_malformed_archive);
1068       goto release_raw_armap;
1069     }
1070 
1071   /* OK, build the carsyms.  */
1072   for (i = 0; i < nsymz && stringsize > 0; i++)
1073     {
1074       bfd_size_type len;
1075 
1076       rawptr = raw_armap + i;
1077       carsyms->file_offset = swap ((bfd_byte *) rawptr);
1078       carsyms->name = stringbase;
1079       /* PR 17512: file: 4a1d50c1.  */
1080       len = strnlen (stringbase, stringsize);
1081       if (len < stringsize)
1082 	len ++;
1083       stringbase += len;
1084       stringsize -= len;
1085       carsyms++;
1086     }
1087   *stringbase = 0;
1088 
1089   ardata->symdef_count = nsymz;
1090   ardata->first_file_filepos = bfd_tell (abfd);
1091   /* Pad to an even boundary if you have to.  */
1092   ardata->first_file_filepos += (ardata->first_file_filepos) % 2;
1093 
1094   bfd_has_map (abfd) = TRUE;
1095   bfd_release (abfd, raw_armap);
1096 
1097   /* Check for a second archive header (as used by PE).  */
1098   {
1099     struct areltdata *tmp;
1100 
1101     bfd_seek (abfd, ardata->first_file_filepos, SEEK_SET);
1102     tmp = (struct areltdata *) _bfd_read_ar_hdr (abfd);
1103     if (tmp != NULL)
1104       {
1105 	if (tmp->arch_header[0] == '/'
1106 	    && tmp->arch_header[1] == ' ')
1107 	  {
1108 	    ardata->first_file_filepos +=
1109 	      (tmp->parsed_size + sizeof (struct ar_hdr) + 1) & ~(unsigned) 1;
1110 	  }
1111 	free (tmp);
1112       }
1113   }
1114 
1115   return TRUE;
1116 
1117 release_raw_armap:
1118   bfd_release (abfd, raw_armap);
1119 release_symdefs:
1120   bfd_release (abfd, (ardata)->symdefs);
1121   return FALSE;
1122 }
1123 
1124 /* This routine can handle either coff-style or bsd-style armaps
1125    (archive symbol table).  Returns FALSE on error, TRUE otherwise */
1126 
1127 bfd_boolean
bfd_slurp_armap(bfd * abfd)1128 bfd_slurp_armap (bfd *abfd)
1129 {
1130   char nextname[17];
1131   int i = bfd_bread (nextname, 16, abfd);
1132 
1133   if (i == 0)
1134     return TRUE;
1135   if (i != 16)
1136     return FALSE;
1137 
1138   if (bfd_seek (abfd, (file_ptr) -16, SEEK_CUR) != 0)
1139     return FALSE;
1140 
1141   if (CONST_STRNEQ (nextname, "__.SYMDEF       ")
1142       || CONST_STRNEQ (nextname, "__.SYMDEF/      ")) /* Old Linux archives.  */
1143     return do_slurp_bsd_armap (abfd);
1144   else if (CONST_STRNEQ (nextname, "/               "))
1145     return do_slurp_coff_armap (abfd);
1146   else if (CONST_STRNEQ (nextname, "/SYM64/         "))
1147     {
1148       /* 64bit (Irix 6) archive.  */
1149 #ifdef BFD64
1150       return _bfd_archive_64_bit_slurp_armap (abfd);
1151 #else
1152       bfd_set_error (bfd_error_wrong_format);
1153       return FALSE;
1154 #endif
1155     }
1156   else if (CONST_STRNEQ (nextname, "#1/20           "))
1157     {
1158       /* Mach-O has a special name for armap when the map is sorted by name.
1159 	 However because this name has a space it is slightly more difficult
1160 	 to check it.  */
1161       struct ar_hdr hdr;
1162       char extname[21];
1163 
1164       if (bfd_bread (&hdr, sizeof (hdr), abfd) != sizeof (hdr))
1165 	return FALSE;
1166       /* Read the extended name.  We know its length.  */
1167       if (bfd_bread (extname, 20, abfd) != 20)
1168 	return FALSE;
1169       if (bfd_seek (abfd, -(file_ptr) (sizeof (hdr) + 20), SEEK_CUR) != 0)
1170 	return FALSE;
1171       extname[20] = 0;
1172       if (CONST_STRNEQ (extname, "__.SYMDEF SORTED")
1173 	  || CONST_STRNEQ (extname, "__.SYMDEF"))
1174 	return do_slurp_bsd_armap (abfd);
1175     }
1176 
1177   bfd_has_map (abfd) = FALSE;
1178   return TRUE;
1179 }
1180 
1181 /* Returns FALSE on error, TRUE otherwise.  */
1182 /* Flavor 2 of a bsd armap, similar to bfd_slurp_bsd_armap except the
1183    header is in a slightly different order and the map name is '/'.
1184    This flavour is used by hp300hpux.  */
1185 
1186 #define HPUX_SYMDEF_COUNT_SIZE 2
1187 
1188 bfd_boolean
bfd_slurp_bsd_armap_f2(bfd * abfd)1189 bfd_slurp_bsd_armap_f2 (bfd *abfd)
1190 {
1191   struct areltdata *mapdata;
1192   char nextname[17];
1193   unsigned int counter;
1194   bfd_byte *raw_armap, *rbase;
1195   struct artdata *ardata = bfd_ardata (abfd);
1196   char *stringbase;
1197   unsigned int stringsize;
1198   unsigned int left;
1199   bfd_size_type amt;
1200   carsym *set;
1201   int i = bfd_bread (nextname, 16, abfd);
1202 
1203   if (i == 0)
1204     return TRUE;
1205   if (i != 16)
1206     return FALSE;
1207 
1208   /* The archive has at least 16 bytes in it.  */
1209   if (bfd_seek (abfd, (file_ptr) -16, SEEK_CUR) != 0)
1210     return FALSE;
1211 
1212   if (CONST_STRNEQ (nextname, "__.SYMDEF       ")
1213       || CONST_STRNEQ (nextname, "__.SYMDEF/      ")) /* Old Linux archives.  */
1214     return do_slurp_bsd_armap (abfd);
1215 
1216   if (! CONST_STRNEQ (nextname, "/               "))
1217     {
1218       bfd_has_map (abfd) = FALSE;
1219       return TRUE;
1220     }
1221 
1222   mapdata = (struct areltdata *) _bfd_read_ar_hdr (abfd);
1223   if (mapdata == NULL)
1224     return FALSE;
1225 
1226   if (mapdata->parsed_size < HPUX_SYMDEF_COUNT_SIZE + BSD_STRING_COUNT_SIZE)
1227     {
1228       free (mapdata);
1229     wrong_format:
1230       bfd_set_error (bfd_error_wrong_format);
1231     byebye:
1232       return FALSE;
1233     }
1234   left = mapdata->parsed_size - HPUX_SYMDEF_COUNT_SIZE - BSD_STRING_COUNT_SIZE;
1235 
1236   amt = mapdata->parsed_size;
1237   free (mapdata);
1238 
1239   raw_armap = (bfd_byte *) bfd_zalloc (abfd, amt);
1240   if (raw_armap == NULL)
1241     goto byebye;
1242 
1243   if (bfd_bread (raw_armap, amt, abfd) != amt)
1244     {
1245       if (bfd_get_error () != bfd_error_system_call)
1246 	bfd_set_error (bfd_error_malformed_archive);
1247       goto byebye;
1248     }
1249 
1250   ardata->symdef_count = H_GET_16 (abfd, raw_armap);
1251 
1252   ardata->cache = 0;
1253 
1254   stringsize = H_GET_32 (abfd, raw_armap + HPUX_SYMDEF_COUNT_SIZE);
1255   if (stringsize > left)
1256     goto wrong_format;
1257   left -= stringsize;
1258 
1259   /* Skip sym count and string sz.  */
1260   stringbase = ((char *) raw_armap
1261 		+ HPUX_SYMDEF_COUNT_SIZE
1262 		+ BSD_STRING_COUNT_SIZE);
1263   rbase = (bfd_byte *) stringbase + stringsize;
1264   amt = ardata->symdef_count * BSD_SYMDEF_SIZE;
1265   if (amt > left)
1266     goto wrong_format;
1267 
1268   ardata->symdefs = (struct carsym *) bfd_alloc (abfd, amt);
1269   if (!ardata->symdefs)
1270     return FALSE;
1271 
1272   for (counter = 0, set = ardata->symdefs;
1273        counter < ardata->symdef_count;
1274        counter++, set++, rbase += BSD_SYMDEF_SIZE)
1275     {
1276       set->name = H_GET_32 (abfd, rbase) + stringbase;
1277       set->file_offset = H_GET_32 (abfd, rbase + BSD_SYMDEF_OFFSET_SIZE);
1278     }
1279 
1280   ardata->first_file_filepos = bfd_tell (abfd);
1281   /* Pad to an even boundary if you have to.  */
1282   ardata->first_file_filepos += (ardata->first_file_filepos) % 2;
1283   /* FIXME, we should provide some way to free raw_ardata when
1284      we are done using the strings from it.  For now, it seems
1285      to be allocated on an objalloc anyway...  */
1286   bfd_has_map (abfd) = TRUE;
1287   return TRUE;
1288 }
1289 
1290 /** Extended name table.
1291 
1292   Normally archives support only 14-character filenames.
1293 
1294   Intel has extended the format: longer names are stored in a special
1295   element (the first in the archive, or second if there is an armap);
1296   the name in the ar_hdr is replaced by <space><index into filename
1297   element>.  Index is the P.R. of an int (decimal).  Data General have
1298   extended the format by using the prefix // for the special element.  */
1299 
1300 /* Returns FALSE on error, TRUE otherwise.  */
1301 
1302 bfd_boolean
_bfd_slurp_extended_name_table(bfd * abfd)1303 _bfd_slurp_extended_name_table (bfd *abfd)
1304 {
1305   char nextname[17];
1306   struct areltdata *namedata;
1307   bfd_size_type amt;
1308 
1309   /* FIXME:  Formatting sucks here, and in case of failure of BFD_READ,
1310      we probably don't want to return TRUE.  */
1311   if (bfd_seek (abfd, bfd_ardata (abfd)->first_file_filepos, SEEK_SET) != 0)
1312     return FALSE;
1313 
1314   if (bfd_bread (nextname, 16, abfd) == 16)
1315     {
1316       if (bfd_seek (abfd, (file_ptr) -16, SEEK_CUR) != 0)
1317 	return FALSE;
1318 
1319       if (! CONST_STRNEQ (nextname, "ARFILENAMES/    ")
1320 	  && ! CONST_STRNEQ (nextname, "//              "))
1321 	{
1322 	  bfd_ardata (abfd)->extended_names = NULL;
1323 	  bfd_ardata (abfd)->extended_names_size = 0;
1324 	  return TRUE;
1325 	}
1326 
1327       namedata = (struct areltdata *) _bfd_read_ar_hdr (abfd);
1328       if (namedata == NULL)
1329 	return FALSE;
1330 
1331       amt = namedata->parsed_size;
1332       if (amt + 1 == 0)
1333 	goto byebye;
1334 
1335       bfd_ardata (abfd)->extended_names_size = amt;
1336       bfd_ardata (abfd)->extended_names = (char *) bfd_zalloc (abfd, amt + 1);
1337       if (bfd_ardata (abfd)->extended_names == NULL)
1338 	{
1339 	byebye:
1340 	  free (namedata);
1341 	  bfd_ardata (abfd)->extended_names = NULL;
1342 	  bfd_ardata (abfd)->extended_names_size = 0;
1343 	  return FALSE;
1344 	}
1345 
1346       if (bfd_bread (bfd_ardata (abfd)->extended_names, amt, abfd) != amt)
1347 	{
1348 	  if (bfd_get_error () != bfd_error_system_call)
1349 	    bfd_set_error (bfd_error_malformed_archive);
1350 	  bfd_release (abfd, (bfd_ardata (abfd)->extended_names));
1351 	  bfd_ardata (abfd)->extended_names = NULL;
1352 	  goto byebye;
1353 	}
1354 
1355       /* Since the archive is supposed to be printable if it contains
1356 	 text, the entries in the list are newline-padded, not null
1357 	 padded. In SVR4-style archives, the names also have a
1358 	 trailing '/'.  DOS/NT created archive often have \ in them
1359 	 We'll fix all problems here.  */
1360       {
1361 	char *ext_names = bfd_ardata (abfd)->extended_names;
1362 	char *temp = ext_names;
1363 	char *limit = temp + namedata->parsed_size;
1364 
1365 	for (; temp < limit; ++temp)
1366 	  {
1367 	    if (*temp == ARFMAG[1])
1368 	      temp[temp > ext_names && temp[-1] == '/' ? -1 : 0] = '\0';
1369 	    if (*temp == '\\')
1370 	      *temp = '/';
1371 	  }
1372 	*limit = '\0';
1373       }
1374 
1375       /* Pad to an even boundary if you have to.  */
1376       bfd_ardata (abfd)->first_file_filepos = bfd_tell (abfd);
1377       bfd_ardata (abfd)->first_file_filepos +=
1378 	(bfd_ardata (abfd)->first_file_filepos) % 2;
1379 
1380       free (namedata);
1381     }
1382   return TRUE;
1383 }
1384 
1385 #ifdef VMS
1386 
1387 /* Return a copy of the stuff in the filename between any :]> and a
1388    semicolon.  */
1389 
1390 static const char *
normalize(bfd * abfd,const char * file)1391 normalize (bfd *abfd, const char *file)
1392 {
1393   const char *first;
1394   const char *last;
1395   char *copy;
1396 
1397   first = file + strlen (file) - 1;
1398   last = first + 1;
1399 
1400   while (first != file)
1401     {
1402       if (*first == ';')
1403 	last = first;
1404       if (*first == ':' || *first == ']' || *first == '>')
1405 	{
1406 	  first++;
1407 	  break;
1408 	}
1409       first--;
1410     }
1411 
1412   copy = bfd_alloc (abfd, last - first + 1);
1413   if (copy == NULL)
1414     return NULL;
1415 
1416   memcpy (copy, first, last - first);
1417   copy[last - first] = 0;
1418 
1419   return copy;
1420 }
1421 
1422 #else
1423 static const char *
normalize(bfd * abfd ATTRIBUTE_UNUSED,const char * file)1424 normalize (bfd *abfd ATTRIBUTE_UNUSED, const char *file)
1425 {
1426   return lbasename (file);
1427 }
1428 #endif
1429 
1430 /* Adjust a relative path name based on the reference path.
1431    For example:
1432 
1433      Relative path  Reference path  Result
1434      -------------  --------------  ------
1435      bar.o          lib.a           bar.o
1436      foo/bar.o      lib.a           foo/bar.o
1437      bar.o          foo/lib.a       ../bar.o
1438      foo/bar.o      baz/lib.a       ../foo/bar.o
1439      bar.o          ../lib.a        <parent of current dir>/bar.o
1440    ; ../bar.o       ../lib.a        bar.o
1441    ; ../bar.o       lib.a           ../bar.o
1442      foo/bar.o      ../lib.a        <parent of current dir>/foo/bar.o
1443      bar.o          ../../lib.a     <grandparent>/<parent>/bar.o
1444      bar.o          foo/baz/lib.a   ../../bar.o
1445 
1446    Note - the semicolons above are there to prevent the BFD chew
1447    utility from interpreting those lines as prototypes to put into
1448    the autogenerated bfd.h header...
1449 
1450    Note - the string is returned in a static buffer.  */
1451 
1452 static const char *
adjust_relative_path(const char * path,const char * ref_path)1453 adjust_relative_path (const char * path, const char * ref_path)
1454 {
1455   static char *pathbuf = NULL;
1456   static unsigned int pathbuf_len = 0;
1457   const char *pathp;
1458   const char *refp;
1459   char * lpath;
1460   char * rpath;
1461   unsigned int len;
1462   unsigned int dir_up = 0;
1463   unsigned int dir_down = 0;
1464   char *newp;
1465   char * pwd = getpwd ();
1466   const char * down;
1467 
1468   /* Remove symlinks, '.' and '..' from the paths, if possible.  */
1469   lpath = lrealpath (path);
1470   pathp = lpath == NULL ? path : lpath;
1471 
1472   rpath = lrealpath (ref_path);
1473   refp = rpath == NULL ? ref_path : rpath;
1474 
1475   /* Remove common leading path elements.  */
1476   for (;;)
1477     {
1478       const char *e1 = pathp;
1479       const char *e2 = refp;
1480 
1481       while (*e1 && ! IS_DIR_SEPARATOR (*e1))
1482 	++e1;
1483       while (*e2 && ! IS_DIR_SEPARATOR (*e2))
1484 	++e2;
1485       if (*e1 == '\0' || *e2 == '\0' || e1 - pathp != e2 - refp
1486 	  || filename_ncmp (pathp, refp, e1 - pathp) != 0)
1487 	break;
1488       pathp = e1 + 1;
1489       refp = e2 + 1;
1490     }
1491 
1492   len = strlen (pathp) + 1;
1493   /* For each leading path element in the reference path,
1494      insert "../" into the path.  */
1495   for (; *refp; ++refp)
1496     if (IS_DIR_SEPARATOR (*refp))
1497       {
1498 	/* PR 12710:  If the path element is "../" then instead of
1499 	   inserting "../" we need to insert the name of the directory
1500 	   at the current level.  */
1501 	if (refp > ref_path + 1
1502 	    && refp[-1] == '.'
1503 	    && refp[-2] == '.')
1504 	  dir_down ++;
1505 	else
1506 	  dir_up ++;
1507       }
1508 
1509   /* If the lrealpath calls above succeeded then we should never
1510      see dir_up and dir_down both being non-zero.  */
1511 
1512   len += 3 * dir_up;
1513 
1514   if (dir_down)
1515     {
1516       down = pwd + strlen (pwd) - 1;
1517 
1518       while (dir_down && down > pwd)
1519 	{
1520 	  if (IS_DIR_SEPARATOR (*down))
1521 	    --dir_down;
1522 	}
1523       BFD_ASSERT (dir_down == 0);
1524       len += strlen (down) + 1;
1525     }
1526   else
1527     down = NULL;
1528 
1529   if (len > pathbuf_len)
1530     {
1531       if (pathbuf != NULL)
1532 	free (pathbuf);
1533       pathbuf_len = 0;
1534       pathbuf = (char *) bfd_malloc (len);
1535       if (pathbuf == NULL)
1536 	goto out;
1537       pathbuf_len = len;
1538     }
1539 
1540   newp = pathbuf;
1541   while (dir_up-- > 0)
1542     {
1543       /* FIXME: Support Windows style path separators as well.  */
1544       strcpy (newp, "../");
1545       newp += 3;
1546     }
1547 
1548   if (down)
1549     sprintf (newp, "%s/%s", down, pathp);
1550   else
1551     strcpy (newp, pathp);
1552 
1553  out:
1554   free (lpath);
1555   free (rpath);
1556   return pathbuf;
1557 }
1558 
1559 /* Build a BFD style extended name table.  */
1560 
1561 bfd_boolean
_bfd_archive_bsd_construct_extended_name_table(bfd * abfd,char ** tabloc,bfd_size_type * tablen,const char ** name)1562 _bfd_archive_bsd_construct_extended_name_table (bfd *abfd,
1563 						char **tabloc,
1564 						bfd_size_type *tablen,
1565 						const char **name)
1566 {
1567   *name = "ARFILENAMES/";
1568   return _bfd_construct_extended_name_table (abfd, FALSE, tabloc, tablen);
1569 }
1570 
1571 /* Build an SVR4 style extended name table.  */
1572 
1573 bfd_boolean
_bfd_archive_coff_construct_extended_name_table(bfd * abfd,char ** tabloc,bfd_size_type * tablen,const char ** name)1574 _bfd_archive_coff_construct_extended_name_table (bfd *abfd,
1575 						 char **tabloc,
1576 						 bfd_size_type *tablen,
1577 						 const char **name)
1578 {
1579   *name = "//";
1580   return _bfd_construct_extended_name_table (abfd, TRUE, tabloc, tablen);
1581 }
1582 
1583 /* Follows archive_head and produces an extended name table if
1584    necessary.  Returns (in tabloc) a pointer to an extended name
1585    table, and in tablen the length of the table.  If it makes an entry
1586    it clobbers the filename so that the element may be written without
1587    further massage.  Returns TRUE if it ran successfully, FALSE if
1588    something went wrong.  A successful return may still involve a
1589    zero-length tablen!  */
1590 
1591 bfd_boolean
_bfd_construct_extended_name_table(bfd * abfd,bfd_boolean trailing_slash,char ** tabloc,bfd_size_type * tablen)1592 _bfd_construct_extended_name_table (bfd *abfd,
1593 				    bfd_boolean trailing_slash,
1594 				    char **tabloc,
1595 				    bfd_size_type *tablen)
1596 {
1597   unsigned int maxname = ar_maxnamelen (abfd);
1598   bfd_size_type total_namelen = 0;
1599   bfd *current;
1600   char *strptr;
1601   const char *last_filename;
1602   long last_stroff;
1603 
1604   *tablen = 0;
1605   last_filename = NULL;
1606 
1607   /* Figure out how long the table should be.  */
1608   for (current = abfd->archive_head;
1609        current != NULL;
1610        current = current->archive_next)
1611     {
1612       const char *normal;
1613       unsigned int thislen;
1614 
1615       if (bfd_is_thin_archive (abfd))
1616 	{
1617 	  const char *filename = current->filename;
1618 
1619 	  /* If the element being added is a member of another archive
1620 	     (i.e., we are flattening), use the containing archive's name.  */
1621 	  if (current->my_archive
1622 	      && ! bfd_is_thin_archive (current->my_archive))
1623 	    filename = current->my_archive->filename;
1624 
1625 	  /* If the path is the same as the previous path seen,
1626 	     reuse it.  This can happen when flattening a thin
1627 	     archive that contains other archives.  */
1628 	  if (last_filename && filename_cmp (last_filename, filename) == 0)
1629 	    continue;
1630 
1631 	  last_filename = filename;
1632 
1633 	  /* If the path is relative, adjust it relative to
1634 	     the containing archive. */
1635 	  if (! IS_ABSOLUTE_PATH (filename)
1636 	      && ! IS_ABSOLUTE_PATH (abfd->filename))
1637 	    normal = adjust_relative_path (filename, abfd->filename);
1638 	  else
1639 	    normal = filename;
1640 
1641 	  /* In a thin archive, always store the full pathname
1642 	     in the extended name table.  */
1643 	  total_namelen += strlen (normal) + 1;
1644 	  if (trailing_slash)
1645 	    /* Leave room for trailing slash.  */
1646 	    ++total_namelen;
1647 
1648 	  continue;
1649 	}
1650 
1651       normal = normalize (current, current->filename);
1652       if (normal == NULL)
1653 	return FALSE;
1654 
1655       thislen = strlen (normal);
1656 
1657       if (thislen > maxname
1658 	  && (bfd_get_file_flags (abfd) & BFD_TRADITIONAL_FORMAT) != 0)
1659 	thislen = maxname;
1660 
1661       if (thislen > maxname)
1662 	{
1663 	  /* Add one to leave room for \n.  */
1664 	  total_namelen += thislen + 1;
1665 	  if (trailing_slash)
1666 	    {
1667 	      /* Leave room for trailing slash.  */
1668 	      ++total_namelen;
1669 	    }
1670 	}
1671       else
1672 	{
1673 	  struct ar_hdr *hdr = arch_hdr (current);
1674 	  if (filename_ncmp (normal, hdr->ar_name, thislen) != 0
1675 	      || (thislen < sizeof hdr->ar_name
1676 		  && hdr->ar_name[thislen] != ar_padchar (current)))
1677 	    {
1678 	      /* Must have been using extended format even though it
1679 		 didn't need to.  Fix it to use normal format.  */
1680 	      memcpy (hdr->ar_name, normal, thislen);
1681 	      if (thislen < maxname
1682 		  || (thislen == maxname && thislen < sizeof hdr->ar_name))
1683 		hdr->ar_name[thislen] = ar_padchar (current);
1684 	    }
1685 	}
1686     }
1687 
1688   if (total_namelen == 0)
1689     return TRUE;
1690 
1691   *tabloc = (char *) bfd_zalloc (abfd, total_namelen);
1692   if (*tabloc == NULL)
1693     return FALSE;
1694 
1695   *tablen = total_namelen;
1696   strptr = *tabloc;
1697 
1698   last_filename = NULL;
1699   last_stroff = 0;
1700 
1701   for (current = abfd->archive_head;
1702        current != NULL;
1703        current = current->archive_next)
1704     {
1705       const char *normal;
1706       unsigned int thislen;
1707       long stroff;
1708       const char *filename = current->filename;
1709 
1710       if (bfd_is_thin_archive (abfd))
1711 	{
1712 	  /* If the element being added is a member of another archive
1713 	     (i.e., we are flattening), use the containing archive's name.  */
1714 	  if (current->my_archive
1715 	      && ! bfd_is_thin_archive (current->my_archive))
1716 	    filename = current->my_archive->filename;
1717 	  /* If the path is the same as the previous path seen,
1718 	     reuse it.  This can happen when flattening a thin
1719 	     archive that contains other archives.
1720 	     If the path is relative, adjust it relative to
1721 	     the containing archive.  */
1722 	  if (last_filename && filename_cmp (last_filename, filename) == 0)
1723 	    normal = last_filename;
1724 	  else if (! IS_ABSOLUTE_PATH (filename)
1725 		   && ! IS_ABSOLUTE_PATH (abfd->filename))
1726 	    normal = adjust_relative_path (filename, abfd->filename);
1727 	  else
1728 	    normal = filename;
1729 	}
1730       else
1731 	{
1732 	  normal = normalize (current, filename);
1733 	  if (normal == NULL)
1734 	    return FALSE;
1735 	}
1736 
1737       thislen = strlen (normal);
1738       if (thislen > maxname || bfd_is_thin_archive (abfd))
1739 	{
1740 	  /* Works for now; may need to be re-engineered if we
1741 	     encounter an oddball archive format and want to
1742 	     generalise this hack.  */
1743 	  struct ar_hdr *hdr = arch_hdr (current);
1744 	  if (normal == last_filename)
1745 	    stroff = last_stroff;
1746 	  else
1747 	    {
1748 	      strcpy (strptr, normal);
1749 	      if (! trailing_slash)
1750 		strptr[thislen] = ARFMAG[1];
1751 	      else
1752 		{
1753 		  strptr[thislen] = '/';
1754 		  strptr[thislen + 1] = ARFMAG[1];
1755 		}
1756 	      stroff = strptr - *tabloc;
1757 	      last_stroff = stroff;
1758 	    }
1759 	  hdr->ar_name[0] = ar_padchar (current);
1760 	  if (bfd_is_thin_archive (abfd) && current->origin > 0)
1761 	    {
1762 	      int len = snprintf (hdr->ar_name + 1, maxname - 1, "%-ld:",
1763 				  stroff);
1764 	      _bfd_ar_spacepad (hdr->ar_name + 1 + len, maxname - 1 - len,
1765 				"%-ld",
1766 				current->origin - sizeof (struct ar_hdr));
1767 	    }
1768 	  else
1769 	    _bfd_ar_spacepad (hdr->ar_name + 1, maxname - 1, "%-ld", stroff);
1770 	  if (normal != last_filename)
1771 	    {
1772 	      strptr += thislen + 1;
1773 	      if (trailing_slash)
1774 		++strptr;
1775 	      last_filename = filename;
1776 	    }
1777 	}
1778     }
1779 
1780   return TRUE;
1781 }
1782 
1783 /* Do not construct an extended name table but transforms name field into
1784    its extended form.  */
1785 
1786 bfd_boolean
_bfd_archive_bsd44_construct_extended_name_table(bfd * abfd,char ** tabloc,bfd_size_type * tablen,const char ** name)1787 _bfd_archive_bsd44_construct_extended_name_table (bfd *abfd,
1788 						  char **tabloc,
1789 						  bfd_size_type *tablen,
1790 						  const char **name)
1791 {
1792   unsigned int maxname = ar_maxnamelen (abfd);
1793   bfd *current;
1794 
1795   *tablen = 0;
1796   *tabloc = NULL;
1797   *name = NULL;
1798 
1799   for (current = abfd->archive_head;
1800        current != NULL;
1801        current = current->archive_next)
1802     {
1803       const char *normal = normalize (current, current->filename);
1804       int has_space = 0;
1805       unsigned int len;
1806 
1807       if (normal == NULL)
1808 	return FALSE;
1809 
1810       for (len = 0; normal[len]; len++)
1811 	if (normal[len] == ' ')
1812 	  has_space = 1;
1813 
1814       if (len > maxname || has_space)
1815 	{
1816 	  struct ar_hdr *hdr = arch_hdr (current);
1817 
1818 	  len = (len + 3) & ~3;
1819 	  arch_eltdata (current)->extra_size = len;
1820 	  _bfd_ar_spacepad (hdr->ar_name, maxname, "#1/%lu", len);
1821 	}
1822     }
1823 
1824   return TRUE;
1825 }
1826 
1827 /* Write an archive header.  */
1828 
1829 bfd_boolean
_bfd_generic_write_ar_hdr(bfd * archive,bfd * abfd)1830 _bfd_generic_write_ar_hdr (bfd *archive, bfd *abfd)
1831 {
1832   struct ar_hdr *hdr = arch_hdr (abfd);
1833 
1834   if (bfd_bwrite (hdr, sizeof (*hdr), archive) != sizeof (*hdr))
1835     return FALSE;
1836   return TRUE;
1837 }
1838 
1839 /* Write an archive header using BSD4.4 convention.  */
1840 
1841 bfd_boolean
_bfd_bsd44_write_ar_hdr(bfd * archive,bfd * abfd)1842 _bfd_bsd44_write_ar_hdr (bfd *archive, bfd *abfd)
1843 {
1844   struct ar_hdr *hdr = arch_hdr (abfd);
1845 
1846   if (is_bsd44_extended_name (hdr->ar_name))
1847     {
1848       /* This is a BSD 4.4 extended name.  */
1849       const char *fullname = normalize (abfd, abfd->filename);
1850       unsigned int len = strlen (fullname);
1851       unsigned int padded_len = (len + 3) & ~3;
1852 
1853       BFD_ASSERT (padded_len == arch_eltdata (abfd)->extra_size);
1854 
1855       if (!_bfd_ar_sizepad (hdr->ar_size, sizeof (hdr->ar_size),
1856 			    arch_eltdata (abfd)->parsed_size + padded_len))
1857 	return FALSE;
1858 
1859       if (bfd_bwrite (hdr, sizeof (*hdr), archive) != sizeof (*hdr))
1860 	return FALSE;
1861 
1862       if (bfd_bwrite (fullname, len, archive) != len)
1863 	return FALSE;
1864 
1865       if (len & 3)
1866 	{
1867 	  static const char pad[3] = { 0, 0, 0 };
1868 
1869 	  len = 4 - (len & 3);
1870 	  if (bfd_bwrite (pad, len, archive) != len)
1871 	    return FALSE;
1872 	}
1873     }
1874   else
1875     {
1876       if (bfd_bwrite (hdr, sizeof (*hdr), archive) != sizeof (*hdr))
1877 	return FALSE;
1878     }
1879   return TRUE;
1880 }
1881 
1882 /* A couple of functions for creating ar_hdrs.  */
1883 
1884 #ifdef HPUX_LARGE_AR_IDS
1885 /* Function to encode large UID/GID values according to HP.  */
1886 
1887 static void
hpux_uid_gid_encode(char str[6],long int id)1888 hpux_uid_gid_encode (char str[6], long int id)
1889 {
1890   int cnt;
1891 
1892   str[5] = '@' + (id & 3);
1893   id >>= 2;
1894 
1895   for (cnt = 4; cnt >= 0; --cnt, id >>= 6)
1896     str[cnt] = ' ' + (id & 0x3f);
1897 }
1898 #endif	/* HPUX_LARGE_AR_IDS */
1899 
1900 #ifndef HAVE_GETUID
1901 #define getuid() 0
1902 #endif
1903 
1904 #ifndef HAVE_GETGID
1905 #define getgid() 0
1906 #endif
1907 
1908 /* Takes a filename, returns an arelt_data for it, or NULL if it can't
1909    make one.  The filename must refer to a filename in the filesystem.
1910    The filename field of the ar_hdr will NOT be initialized.  If member
1911    is set, and it's an in-memory bfd, we fake it.  */
1912 
1913 static struct areltdata *
bfd_ar_hdr_from_filesystem(bfd * abfd,const char * filename,bfd * member)1914 bfd_ar_hdr_from_filesystem (bfd *abfd, const char *filename, bfd *member)
1915 {
1916   struct stat status;
1917   struct areltdata *ared;
1918   struct ar_hdr *hdr;
1919   bfd_size_type amt;
1920 
1921   if (member && (member->flags & BFD_IN_MEMORY) != 0)
1922     {
1923       /* Assume we just "made" the member, and fake it.  */
1924       struct bfd_in_memory *bim = (struct bfd_in_memory *) member->iostream;
1925       time (&status.st_mtime);
1926       status.st_uid = getuid ();
1927       status.st_gid = getgid ();
1928       status.st_mode = 0644;
1929       status.st_size = bim->size;
1930     }
1931   else if (stat (filename, &status) != 0)
1932     {
1933       bfd_set_error (bfd_error_system_call);
1934       return NULL;
1935     }
1936 
1937   /* If the caller requested that the BFD generate deterministic output,
1938      fake values for modification time, UID, GID, and file mode.  */
1939   if ((abfd->flags & BFD_DETERMINISTIC_OUTPUT) != 0)
1940     {
1941       status.st_mtime = 0;
1942       status.st_uid = 0;
1943       status.st_gid = 0;
1944       status.st_mode = 0644;
1945     }
1946 
1947   amt = sizeof (struct ar_hdr) + sizeof (struct areltdata);
1948   ared = (struct areltdata *) bfd_zmalloc (amt);
1949   if (ared == NULL)
1950     return NULL;
1951   hdr = (struct ar_hdr *) (((char *) ared) + sizeof (struct areltdata));
1952 
1953   /* ar headers are space padded, not null padded!  */
1954   memset (hdr, ' ', sizeof (struct ar_hdr));
1955 
1956   _bfd_ar_spacepad (hdr->ar_date, sizeof (hdr->ar_date), "%-12ld",
1957 		    status.st_mtime);
1958 #ifdef HPUX_LARGE_AR_IDS
1959   /* HP has a very "special" way to handle UID/GID's with numeric values
1960      > 99999.  */
1961   if (status.st_uid > 99999)
1962     hpux_uid_gid_encode (hdr->ar_uid, (long) status.st_uid);
1963   else
1964 #endif
1965     _bfd_ar_spacepad (hdr->ar_uid, sizeof (hdr->ar_uid), "%ld",
1966 		      status.st_uid);
1967 #ifdef HPUX_LARGE_AR_IDS
1968   /* HP has a very "special" way to handle UID/GID's with numeric values
1969      > 99999.  */
1970   if (status.st_gid > 99999)
1971     hpux_uid_gid_encode (hdr->ar_gid, (long) status.st_gid);
1972   else
1973 #endif
1974     _bfd_ar_spacepad (hdr->ar_gid, sizeof (hdr->ar_gid), "%ld",
1975 		      status.st_gid);
1976   _bfd_ar_spacepad (hdr->ar_mode, sizeof (hdr->ar_mode), "%-8lo",
1977 		    status.st_mode);
1978   if (!_bfd_ar_sizepad (hdr->ar_size, sizeof (hdr->ar_size), status.st_size))
1979     {
1980       free (ared);
1981       return NULL;
1982     }
1983   memcpy (hdr->ar_fmag, ARFMAG, 2);
1984   ared->parsed_size = status.st_size;
1985   ared->arch_header = (char *) hdr;
1986 
1987   return ared;
1988 }
1989 
1990 /* Analogous to stat call.  */
1991 
1992 int
bfd_generic_stat_arch_elt(bfd * abfd,struct stat * buf)1993 bfd_generic_stat_arch_elt (bfd *abfd, struct stat *buf)
1994 {
1995   struct ar_hdr *hdr;
1996   char *aloser;
1997 
1998   if (abfd->arelt_data == NULL)
1999     {
2000       bfd_set_error (bfd_error_invalid_operation);
2001       return -1;
2002     }
2003 
2004   hdr = arch_hdr (abfd);
2005   /* PR 17512: file: 3d9e9fe9.  */
2006   if (hdr == NULL)
2007     return -1;
2008 #define foo(arelt, stelt, size)				\
2009   buf->stelt = strtol (hdr->arelt, &aloser, size);	\
2010   if (aloser == hdr->arelt)	      			\
2011     return -1;
2012 
2013   /* Some platforms support special notations for large IDs.  */
2014 #ifdef HPUX_LARGE_AR_IDS
2015 # define foo2(arelt, stelt, size)					\
2016   if (hdr->arelt[5] == ' ')						\
2017     {									\
2018       foo (arelt, stelt, size);						\
2019     }									\
2020   else									\
2021     {									\
2022       int cnt;								\
2023       for (buf->stelt = cnt = 0; cnt < 5; ++cnt)			\
2024 	{								\
2025 	  if (hdr->arelt[cnt] < ' ' || hdr->arelt[cnt] > ' ' + 0x3f)	\
2026 	    return -1;							\
2027 	  buf->stelt <<= 6;						\
2028 	  buf->stelt += hdr->arelt[cnt] - ' ';				\
2029 	}								\
2030       if (hdr->arelt[5] < '@' || hdr->arelt[5] > '@' + 3)		\
2031 	return -1;							\
2032       buf->stelt <<= 2;							\
2033       buf->stelt += hdr->arelt[5] - '@';				\
2034     }
2035 #else
2036 # define foo2(arelt, stelt, size) foo (arelt, stelt, size)
2037 #endif
2038 
2039   foo (ar_date, st_mtime, 10);
2040   foo2 (ar_uid, st_uid, 10);
2041   foo2 (ar_gid, st_gid, 10);
2042   foo (ar_mode, st_mode, 8);
2043 
2044   buf->st_size = arch_eltdata (abfd)->parsed_size;
2045 
2046   return 0;
2047 }
2048 
2049 void
bfd_dont_truncate_arname(bfd * abfd,const char * pathname,char * arhdr)2050 bfd_dont_truncate_arname (bfd *abfd, const char *pathname, char *arhdr)
2051 {
2052   /* FIXME: This interacts unpleasantly with ar's quick-append option.
2053      Fortunately ic960 users will never use that option.  Fixing this
2054      is very hard; fortunately I know how to do it and will do so once
2055      intel's release is out the door.  */
2056 
2057   struct ar_hdr *hdr = (struct ar_hdr *) arhdr;
2058   size_t length;
2059   const char *filename;
2060   size_t maxlen = ar_maxnamelen (abfd);
2061 
2062   if ((bfd_get_file_flags (abfd) & BFD_TRADITIONAL_FORMAT) != 0)
2063     {
2064       bfd_bsd_truncate_arname (abfd, pathname, arhdr);
2065       return;
2066     }
2067 
2068   filename = normalize (abfd, pathname);
2069   if (filename == NULL)
2070     {
2071       /* FIXME */
2072       abort ();
2073     }
2074 
2075   length = strlen (filename);
2076 
2077   if (length <= maxlen)
2078     memcpy (hdr->ar_name, filename, length);
2079 
2080   /* Add the padding character if there is room for it.  */
2081   if (length < maxlen
2082       || (length == maxlen && length < sizeof hdr->ar_name))
2083     (hdr->ar_name)[length] = ar_padchar (abfd);
2084 }
2085 
2086 void
bfd_bsd_truncate_arname(bfd * abfd,const char * pathname,char * arhdr)2087 bfd_bsd_truncate_arname (bfd *abfd, const char *pathname, char *arhdr)
2088 {
2089   struct ar_hdr *hdr = (struct ar_hdr *) arhdr;
2090   size_t length;
2091   const char *filename = lbasename (pathname);
2092   size_t maxlen = ar_maxnamelen (abfd);
2093 
2094   length = strlen (filename);
2095 
2096   if (length <= maxlen)
2097     memcpy (hdr->ar_name, filename, length);
2098   else
2099     {
2100       /* pathname: meet procrustes */
2101       memcpy (hdr->ar_name, filename, maxlen);
2102       length = maxlen;
2103     }
2104 
2105   if (length < maxlen)
2106     (hdr->ar_name)[length] = ar_padchar (abfd);
2107 }
2108 
2109 /* Store name into ar header.  Truncates the name to fit.
2110    1> strip pathname to be just the basename.
2111    2> if it's short enuf to fit, stuff it in.
2112    3> If it doesn't end with .o, truncate it to fit
2113    4> truncate it before the .o, append .o, stuff THAT in.  */
2114 
2115 /* This is what gnu ar does.  It's better but incompatible with the
2116    bsd ar.  */
2117 
2118 void
bfd_gnu_truncate_arname(bfd * abfd,const char * pathname,char * arhdr)2119 bfd_gnu_truncate_arname (bfd *abfd, const char *pathname, char *arhdr)
2120 {
2121   struct ar_hdr *hdr = (struct ar_hdr *) arhdr;
2122   size_t length;
2123   const char *filename = lbasename (pathname);
2124   size_t maxlen = ar_maxnamelen (abfd);
2125 
2126   length = strlen (filename);
2127 
2128   if (length <= maxlen)
2129     memcpy (hdr->ar_name, filename, length);
2130   else
2131     {
2132       /* pathname: meet procrustes.  */
2133       memcpy (hdr->ar_name, filename, maxlen);
2134       if ((filename[length - 2] == '.') && (filename[length - 1] == 'o'))
2135 	{
2136 	  hdr->ar_name[maxlen - 2] = '.';
2137 	  hdr->ar_name[maxlen - 1] = 'o';
2138 	}
2139       length = maxlen;
2140     }
2141 
2142   if (length < 16)
2143     (hdr->ar_name)[length] = ar_padchar (abfd);
2144 }
2145 
2146 /* The BFD is open for write and has its format set to bfd_archive.  */
2147 
2148 bfd_boolean
_bfd_write_archive_contents(bfd * arch)2149 _bfd_write_archive_contents (bfd *arch)
2150 {
2151   bfd *current;
2152   char *etable = NULL;
2153   bfd_size_type elength = 0;
2154   const char *ename = NULL;
2155   bfd_boolean makemap = bfd_has_map (arch);
2156   /* If no .o's, don't bother to make a map.  */
2157   bfd_boolean hasobjects = FALSE;
2158   bfd_size_type wrote;
2159   int tries;
2160   char *armag;
2161 
2162   /* Verify the viability of all entries; if any of them live in the
2163      filesystem (as opposed to living in an archive open for input)
2164      then construct a fresh ar_hdr for them.  */
2165   for (current = arch->archive_head;
2166        current != NULL;
2167        current = current->archive_next)
2168     {
2169       /* This check is checking the bfds for the objects we're reading
2170 	 from (which are usually either an object file or archive on
2171 	 disk), not the archive entries we're writing to.  We don't
2172 	 actually create bfds for the archive members, we just copy
2173 	 them byte-wise when we write out the archive.  */
2174       if (bfd_write_p (current))
2175 	{
2176 	  bfd_set_error (bfd_error_invalid_operation);
2177 	  goto input_err;
2178 	}
2179       if (!current->arelt_data)
2180 	{
2181 	  current->arelt_data =
2182 	    bfd_ar_hdr_from_filesystem (arch, current->filename, current);
2183 	  if (!current->arelt_data)
2184 	    goto input_err;
2185 
2186 	  /* Put in the file name.  */
2187 	  BFD_SEND (arch, _bfd_truncate_arname,
2188 		    (arch, current->filename, (char *) arch_hdr (current)));
2189 	}
2190 
2191       if (makemap && ! hasobjects)
2192 	{			/* Don't bother if we won't make a map!  */
2193 	  if ((bfd_check_format (current, bfd_object)))
2194 	    hasobjects = TRUE;
2195 	}
2196     }
2197 
2198   if (!BFD_SEND (arch, _bfd_construct_extended_name_table,
2199 		 (arch, &etable, &elength, &ename)))
2200     return FALSE;
2201 
2202   if (bfd_seek (arch, (file_ptr) 0, SEEK_SET) != 0)
2203     return FALSE;
2204   armag = ARMAG;
2205   if (bfd_is_thin_archive (arch))
2206     armag = ARMAGT;
2207   wrote = bfd_bwrite (armag, SARMAG, arch);
2208   if (wrote != SARMAG)
2209     return FALSE;
2210 
2211   if (makemap && hasobjects)
2212     {
2213       if (! _bfd_compute_and_write_armap (arch, (unsigned int) elength))
2214 	return FALSE;
2215     }
2216 
2217   if (elength != 0)
2218     {
2219       struct ar_hdr hdr;
2220 
2221       memset (&hdr, ' ', sizeof (struct ar_hdr));
2222       memcpy (hdr.ar_name, ename, strlen (ename));
2223       /* Round size up to even number in archive header.  */
2224       if (!_bfd_ar_sizepad (hdr.ar_size, sizeof (hdr.ar_size),
2225 			    (elength + 1) & ~(bfd_size_type) 1))
2226 	return FALSE;
2227       memcpy (hdr.ar_fmag, ARFMAG, 2);
2228       if ((bfd_bwrite (&hdr, sizeof (struct ar_hdr), arch)
2229 	   != sizeof (struct ar_hdr))
2230 	  || bfd_bwrite (etable, elength, arch) != elength)
2231 	return FALSE;
2232       if ((elength % 2) == 1)
2233 	{
2234 	  if (bfd_bwrite (&ARFMAG[1], 1, arch) != 1)
2235 	    return FALSE;
2236 	}
2237     }
2238 
2239   for (current = arch->archive_head;
2240        current != NULL;
2241        current = current->archive_next)
2242     {
2243       char buffer[DEFAULT_BUFFERSIZE];
2244       bfd_size_type remaining = arelt_size (current);
2245 
2246       /* Write ar header.  */
2247       if (!_bfd_write_ar_hdr (arch, current))
2248 	return FALSE;
2249       if (bfd_is_thin_archive (arch))
2250 	continue;
2251       if (bfd_seek (current, (file_ptr) 0, SEEK_SET) != 0)
2252 	goto input_err;
2253 
2254       while (remaining)
2255 	{
2256 	  unsigned int amt = DEFAULT_BUFFERSIZE;
2257 
2258 	  if (amt > remaining)
2259 	    amt = remaining;
2260 	  errno = 0;
2261 	  if (bfd_bread (buffer, amt, current) != amt)
2262 	    {
2263 	      if (bfd_get_error () != bfd_error_system_call)
2264 		bfd_set_error (bfd_error_file_truncated);
2265 	      goto input_err;
2266 	    }
2267 	  if (bfd_bwrite (buffer, amt, arch) != amt)
2268 	    return FALSE;
2269 	  remaining -= amt;
2270 	}
2271 
2272       if ((arelt_size (current) % 2) == 1)
2273 	{
2274 	  if (bfd_bwrite (&ARFMAG[1], 1, arch) != 1)
2275 	    return FALSE;
2276 	}
2277     }
2278 
2279   if (makemap && hasobjects)
2280     {
2281       /* Verify the timestamp in the archive file.  If it would not be
2282 	 accepted by the linker, rewrite it until it would be.  If
2283 	 anything odd happens, break out and just return.  (The
2284 	 Berkeley linker checks the timestamp and refuses to read the
2285 	 table-of-contents if it is >60 seconds less than the file's
2286 	 modified-time.  That painful hack requires this painful hack.  */
2287       tries = 1;
2288       do
2289 	{
2290 	  if (bfd_update_armap_timestamp (arch))
2291 	    break;
2292 	  (*_bfd_error_handler)
2293 	    (_("Warning: writing archive was slow: rewriting timestamp\n"));
2294 	}
2295       while (++tries < 6);
2296     }
2297 
2298   return TRUE;
2299 
2300  input_err:
2301   bfd_set_error (bfd_error_on_input, current, bfd_get_error ());
2302   return FALSE;
2303 }
2304 
2305 /* Note that the namidx for the first symbol is 0.  */
2306 
2307 bfd_boolean
_bfd_compute_and_write_armap(bfd * arch,unsigned int elength)2308 _bfd_compute_and_write_armap (bfd *arch, unsigned int elength)
2309 {
2310   char *first_name = NULL;
2311   bfd *current;
2312   file_ptr elt_no = 0;
2313   struct orl *map = NULL;
2314   unsigned int orl_max = 1024;		/* Fine initial default.  */
2315   unsigned int orl_count = 0;
2316   int stridx = 0;
2317   asymbol **syms = NULL;
2318   long syms_max = 0;
2319   bfd_boolean ret;
2320   bfd_size_type amt;
2321 
2322   /* Dunno if this is the best place for this info...  */
2323   if (elength != 0)
2324     elength += sizeof (struct ar_hdr);
2325   elength += elength % 2;
2326 
2327   amt = orl_max * sizeof (struct orl);
2328   map = (struct orl *) bfd_malloc (amt);
2329   if (map == NULL)
2330     goto error_return;
2331 
2332   /* We put the symbol names on the arch objalloc, and then discard
2333      them when done.  */
2334   first_name = (char *) bfd_alloc (arch, 1);
2335   if (first_name == NULL)
2336     goto error_return;
2337 
2338   /* Drop all the files called __.SYMDEF, we're going to make our own.  */
2339   while (arch->archive_head
2340 	 && strcmp (arch->archive_head->filename, "__.SYMDEF") == 0)
2341     arch->archive_head = arch->archive_head->archive_next;
2342 
2343   /* Map over each element.  */
2344   for (current = arch->archive_head;
2345        current != NULL;
2346        current = current->archive_next, elt_no++)
2347     {
2348       if (bfd_check_format (current, bfd_object)
2349 	  && (bfd_get_file_flags (current) & HAS_SYMS) != 0)
2350 	{
2351 	  long storage;
2352 	  long symcount;
2353 	  long src_count;
2354 
2355 	  storage = bfd_get_symtab_upper_bound (current);
2356 	  if (storage < 0)
2357 	    goto error_return;
2358 
2359 	  if (storage != 0)
2360 	    {
2361 	      if (storage > syms_max)
2362 		{
2363 		  if (syms_max > 0)
2364 		    free (syms);
2365 		  syms_max = storage;
2366 		  syms = (asymbol **) bfd_malloc (syms_max);
2367 		  if (syms == NULL)
2368 		    goto error_return;
2369 		}
2370 	      symcount = bfd_canonicalize_symtab (current, syms);
2371 	      if (symcount < 0)
2372 		goto error_return;
2373 
2374 	      /* Now map over all the symbols, picking out the ones we
2375 		 want.  */
2376 	      for (src_count = 0; src_count < symcount; src_count++)
2377 		{
2378 		  flagword flags = (syms[src_count])->flags;
2379 		  asection *sec = syms[src_count]->section;
2380 
2381 		  if (((flags & (BSF_GLOBAL
2382 				 | BSF_WEAK
2383 				 | BSF_INDIRECT
2384 				 | BSF_GNU_UNIQUE)) != 0
2385 		       || bfd_is_com_section (sec))
2386 		      && ! bfd_is_und_section (sec))
2387 		    {
2388 		      bfd_size_type namelen;
2389 		      struct orl *new_map;
2390 
2391 		      /* This symbol will go into the archive header.  */
2392 		      if (orl_count == orl_max)
2393 			{
2394 			  orl_max *= 2;
2395 			  amt = orl_max * sizeof (struct orl);
2396 			  new_map = (struct orl *) bfd_realloc (map, amt);
2397 			  if (new_map == NULL)
2398 			    goto error_return;
2399 
2400 			  map = new_map;
2401 			}
2402 
2403 		      if (strcmp (syms[src_count]->name, "__gnu_lto_slim") == 0)
2404 			(*_bfd_error_handler)
2405 			  (_("%s: plugin needed to handle lto object"),
2406 			   bfd_get_filename (current));
2407 		      namelen = strlen (syms[src_count]->name);
2408 		      amt = sizeof (char *);
2409 		      map[orl_count].name = (char **) bfd_alloc (arch, amt);
2410 		      if (map[orl_count].name == NULL)
2411 			goto error_return;
2412 		      *(map[orl_count].name) = (char *) bfd_alloc (arch,
2413 								   namelen + 1);
2414 		      if (*(map[orl_count].name) == NULL)
2415 			goto error_return;
2416 		      strcpy (*(map[orl_count].name), syms[src_count]->name);
2417 		      map[orl_count].u.abfd = current;
2418 		      map[orl_count].namidx = stridx;
2419 
2420 		      stridx += namelen + 1;
2421 		      ++orl_count;
2422 		    }
2423 		}
2424 	    }
2425 
2426 	  /* Now ask the BFD to free up any cached information, so we
2427 	     don't fill all of memory with symbol tables.  */
2428 	  if (! bfd_free_cached_info (current))
2429 	    goto error_return;
2430 	}
2431     }
2432 
2433   /* OK, now we have collected all the data, let's write them out.  */
2434   ret = BFD_SEND (arch, write_armap,
2435 		  (arch, elength, map, orl_count, stridx));
2436 
2437   if (syms_max > 0)
2438     free (syms);
2439   if (map != NULL)
2440     free (map);
2441   if (first_name != NULL)
2442     bfd_release (arch, first_name);
2443 
2444   return ret;
2445 
2446  error_return:
2447   if (syms_max > 0)
2448     free (syms);
2449   if (map != NULL)
2450     free (map);
2451   if (first_name != NULL)
2452     bfd_release (arch, first_name);
2453 
2454   return FALSE;
2455 }
2456 
2457 bfd_boolean
bsd_write_armap(bfd * arch,unsigned int elength,struct orl * map,unsigned int orl_count,int stridx)2458 bsd_write_armap (bfd *arch,
2459 		 unsigned int elength,
2460 		 struct orl *map,
2461 		 unsigned int orl_count,
2462 		 int stridx)
2463 {
2464   int padit = stridx & 1;
2465   unsigned int ranlibsize = orl_count * BSD_SYMDEF_SIZE;
2466   unsigned int stringsize = stridx + padit;
2467   /* Include 8 bytes to store ranlibsize and stringsize in output.  */
2468   unsigned int mapsize = ranlibsize + stringsize + 8;
2469   file_ptr firstreal, first;
2470   bfd *current;
2471   bfd *last_elt;
2472   bfd_byte temp[4];
2473   unsigned int count;
2474   struct ar_hdr hdr;
2475   long uid, gid;
2476 
2477   first = mapsize + elength + sizeof (struct ar_hdr) + SARMAG;
2478 
2479 #ifdef BFD64
2480   firstreal = first;
2481   current = arch->archive_head;
2482   last_elt = current;	/* Last element arch seen.  */
2483   for (count = 0; count < orl_count; count++)
2484     {
2485       unsigned int offset;
2486 
2487       if (map[count].u.abfd != last_elt)
2488 	{
2489 	  do
2490 	    {
2491 	      struct areltdata *ared = arch_eltdata (current);
2492 
2493 	      firstreal += (ared->parsed_size + ared->extra_size
2494 			    + sizeof (struct ar_hdr));
2495 	      firstreal += firstreal % 2;
2496 	      current = current->archive_next;
2497 	    }
2498 	  while (current != map[count].u.abfd);
2499 	}
2500 
2501       /* The archive file format only has 4 bytes to store the offset
2502 	 of the member.  Generate 64-bit archive if an archive is past
2503 	 its 4Gb limit.  */
2504       offset = (unsigned int) firstreal;
2505       if (firstreal != (file_ptr) offset)
2506 	return _bfd_archive_64_bit_write_armap (arch, elength, map,
2507 						orl_count, stridx);
2508 
2509       last_elt = current;
2510     }
2511 #endif
2512 
2513   /* If deterministic, we use 0 as the timestamp in the map.
2514      Some linkers may require that the archive filesystem modification
2515      time is less than (or near to) the archive map timestamp.  Those
2516      linkers should not be used with deterministic mode.  (GNU ld and
2517      Gold do not have this restriction.)  */
2518   bfd_ardata (arch)->armap_timestamp = 0;
2519   uid = 0;
2520   gid = 0;
2521   if ((arch->flags & BFD_DETERMINISTIC_OUTPUT) == 0)
2522     {
2523       struct stat statbuf;
2524 
2525       if (stat (arch->filename, &statbuf) == 0)
2526 	bfd_ardata (arch)->armap_timestamp = (statbuf.st_mtime
2527 					      + ARMAP_TIME_OFFSET);
2528       uid = getuid();
2529       gid = getgid();
2530     }
2531 
2532   memset (&hdr, ' ', sizeof (struct ar_hdr));
2533   memcpy (hdr.ar_name, RANLIBMAG, strlen (RANLIBMAG));
2534   bfd_ardata (arch)->armap_datepos = (SARMAG
2535 				      + offsetof (struct ar_hdr, ar_date[0]));
2536   _bfd_ar_spacepad (hdr.ar_date, sizeof (hdr.ar_date), "%ld",
2537 		    bfd_ardata (arch)->armap_timestamp);
2538   _bfd_ar_spacepad (hdr.ar_uid, sizeof (hdr.ar_uid), "%ld", uid);
2539   _bfd_ar_spacepad (hdr.ar_gid, sizeof (hdr.ar_gid), "%ld", gid);
2540   if (!_bfd_ar_sizepad (hdr.ar_size, sizeof (hdr.ar_size), mapsize))
2541     return FALSE;
2542   memcpy (hdr.ar_fmag, ARFMAG, 2);
2543   if (bfd_bwrite (&hdr, sizeof (struct ar_hdr), arch)
2544       != sizeof (struct ar_hdr))
2545     return FALSE;
2546   H_PUT_32 (arch, ranlibsize, temp);
2547   if (bfd_bwrite (temp, sizeof (temp), arch) != sizeof (temp))
2548     return FALSE;
2549 
2550   firstreal = first;
2551   current = arch->archive_head;
2552   last_elt = current;	/* Last element arch seen.  */
2553   for (count = 0; count < orl_count; count++)
2554     {
2555       unsigned int offset;
2556       bfd_byte buf[BSD_SYMDEF_SIZE];
2557 
2558       if (map[count].u.abfd != last_elt)
2559 	{
2560 	  do
2561 	    {
2562 	      struct areltdata *ared = arch_eltdata (current);
2563 
2564 	      firstreal += (ared->parsed_size + ared->extra_size
2565 			    + sizeof (struct ar_hdr));
2566 	      firstreal += firstreal % 2;
2567 	      current = current->archive_next;
2568 	    }
2569 	  while (current != map[count].u.abfd);
2570 	}
2571 
2572       /* The archive file format only has 4 bytes to store the offset
2573 	 of the member.  Check to make sure that firstreal has not grown
2574 	 too big.  */
2575       offset = (unsigned int) firstreal;
2576       if (firstreal != (file_ptr) offset)
2577 	{
2578 	  bfd_set_error (bfd_error_file_truncated);
2579 	  return FALSE;
2580 	}
2581 
2582       last_elt = current;
2583       H_PUT_32 (arch, map[count].namidx, buf);
2584       H_PUT_32 (arch, firstreal, buf + BSD_SYMDEF_OFFSET_SIZE);
2585       if (bfd_bwrite (buf, BSD_SYMDEF_SIZE, arch)
2586 	  != BSD_SYMDEF_SIZE)
2587 	return FALSE;
2588     }
2589 
2590   /* Now write the strings themselves.  */
2591   H_PUT_32 (arch, stringsize, temp);
2592   if (bfd_bwrite (temp, sizeof (temp), arch) != sizeof (temp))
2593     return FALSE;
2594   for (count = 0; count < orl_count; count++)
2595     {
2596       size_t len = strlen (*map[count].name) + 1;
2597 
2598       if (bfd_bwrite (*map[count].name, len, arch) != len)
2599 	return FALSE;
2600     }
2601 
2602   /* The spec sez this should be a newline.  But in order to be
2603      bug-compatible for sun's ar we use a null.  */
2604   if (padit)
2605     {
2606       if (bfd_bwrite ("", 1, arch) != 1)
2607 	return FALSE;
2608     }
2609 
2610   return TRUE;
2611 }
2612 
2613 /* At the end of archive file handling, update the timestamp in the
2614    file, so the linker will accept it.
2615 
2616    Return TRUE if the timestamp was OK, or an unusual problem happened.
2617    Return FALSE if we updated the timestamp.  */
2618 
2619 bfd_boolean
_bfd_archive_bsd_update_armap_timestamp(bfd * arch)2620 _bfd_archive_bsd_update_armap_timestamp (bfd *arch)
2621 {
2622   struct stat archstat;
2623   struct ar_hdr hdr;
2624 
2625   /* If creating deterministic archives, just leave the timestamp as-is.  */
2626   if ((arch->flags & BFD_DETERMINISTIC_OUTPUT) != 0)
2627     return TRUE;
2628 
2629   /* Flush writes, get last-write timestamp from file, and compare it
2630      to the timestamp IN the file.  */
2631   bfd_flush (arch);
2632   if (bfd_stat (arch, &archstat) == -1)
2633     {
2634       bfd_perror (_("Reading archive file mod timestamp"));
2635 
2636       /* Can't read mod time for some reason.  */
2637       return TRUE;
2638     }
2639   if (((long) archstat.st_mtime) <= bfd_ardata (arch)->armap_timestamp)
2640     /* OK by the linker's rules.  */
2641     return TRUE;
2642 
2643   /* Update the timestamp.  */
2644   bfd_ardata (arch)->armap_timestamp = archstat.st_mtime + ARMAP_TIME_OFFSET;
2645 
2646   /* Prepare an ASCII version suitable for writing.  */
2647   memset (hdr.ar_date, ' ', sizeof (hdr.ar_date));
2648   _bfd_ar_spacepad (hdr.ar_date, sizeof (hdr.ar_date), "%ld",
2649 		    bfd_ardata (arch)->armap_timestamp);
2650 
2651   /* Write it into the file.  */
2652   bfd_ardata (arch)->armap_datepos = (SARMAG
2653 				      + offsetof (struct ar_hdr, ar_date[0]));
2654   if (bfd_seek (arch, bfd_ardata (arch)->armap_datepos, SEEK_SET) != 0
2655       || (bfd_bwrite (hdr.ar_date, sizeof (hdr.ar_date), arch)
2656 	  != sizeof (hdr.ar_date)))
2657     {
2658       bfd_perror (_("Writing updated armap timestamp"));
2659 
2660       /* Some error while writing.  */
2661       return TRUE;
2662     }
2663 
2664   /* We updated the timestamp successfully.  */
2665   return FALSE;
2666 }
2667 
2668 /* A coff armap looks like :
2669    lARMAG
2670    struct ar_hdr with name = '/'
2671    number of symbols
2672    offset of file for symbol 0
2673    offset of file for symbol 1
2674 
2675    offset of file for symbol n-1
2676    symbol name 0
2677    symbol name 1
2678 
2679    symbol name n-1  */
2680 
2681 bfd_boolean
coff_write_armap(bfd * arch,unsigned int elength,struct orl * map,unsigned int symbol_count,int stridx)2682 coff_write_armap (bfd *arch,
2683 		  unsigned int elength,
2684 		  struct orl *map,
2685 		  unsigned int symbol_count,
2686 		  int stridx)
2687 {
2688   /* The size of the ranlib is the number of exported symbols in the
2689      archive * the number of bytes in an int, + an int for the count.  */
2690   unsigned int ranlibsize = (symbol_count * 4) + 4;
2691   unsigned int stringsize = stridx;
2692   unsigned int mapsize = stringsize + ranlibsize;
2693   file_ptr archive_member_file_ptr;
2694   file_ptr first_archive_member_file_ptr;
2695   bfd *current = arch->archive_head;
2696   unsigned int count;
2697   struct ar_hdr hdr;
2698   int padit = mapsize & 1;
2699 
2700   if (padit)
2701     mapsize++;
2702 
2703   /* Work out where the first object file will go in the archive.  */
2704   first_archive_member_file_ptr = (mapsize
2705 				   + elength
2706 				   + sizeof (struct ar_hdr)
2707 				   + SARMAG);
2708 
2709 #ifdef BFD64
2710   current = arch->archive_head;
2711   count = 0;
2712   archive_member_file_ptr = first_archive_member_file_ptr;
2713   while (current != NULL && count < symbol_count)
2714     {
2715       /* For each symbol which is used defined in this object, write
2716 	 out the object file's address in the archive.  */
2717 
2718       while (count < symbol_count && map[count].u.abfd == current)
2719 	{
2720 	  unsigned int offset = (unsigned int) archive_member_file_ptr;
2721 
2722 	  /* Generate 64-bit archive if an archive is past its 4Gb
2723 	     limit.  */
2724 	  if (archive_member_file_ptr != (file_ptr) offset)
2725 	    return _bfd_archive_64_bit_write_armap (arch, elength, map,
2726 						    symbol_count, stridx);
2727 	  count++;
2728 	}
2729       archive_member_file_ptr += sizeof (struct ar_hdr);
2730       if (! bfd_is_thin_archive (arch))
2731 	{
2732 	  /* Add size of this archive entry.  */
2733 	  archive_member_file_ptr += arelt_size (current);
2734 	  /* Remember about the even alignment.  */
2735 	  archive_member_file_ptr += archive_member_file_ptr % 2;
2736 	}
2737       current = current->archive_next;
2738     }
2739 #endif
2740 
2741   memset (&hdr, ' ', sizeof (struct ar_hdr));
2742   hdr.ar_name[0] = '/';
2743   if (!_bfd_ar_sizepad (hdr.ar_size, sizeof (hdr.ar_size), mapsize))
2744     return FALSE;
2745   _bfd_ar_spacepad (hdr.ar_date, sizeof (hdr.ar_date), "%ld",
2746 		    ((arch->flags & BFD_DETERMINISTIC_OUTPUT) == 0
2747 		     ? time (NULL) : 0));
2748   /* This, at least, is what Intel coff sets the values to.  */
2749   _bfd_ar_spacepad (hdr.ar_uid, sizeof (hdr.ar_uid), "%ld", 0);
2750   _bfd_ar_spacepad (hdr.ar_gid, sizeof (hdr.ar_gid), "%ld", 0);
2751   _bfd_ar_spacepad (hdr.ar_mode, sizeof (hdr.ar_mode), "%-7lo", 0);
2752   memcpy (hdr.ar_fmag, ARFMAG, 2);
2753 
2754   /* Write the ar header for this item and the number of symbols.  */
2755   if (bfd_bwrite (&hdr, sizeof (struct ar_hdr), arch)
2756       != sizeof (struct ar_hdr))
2757     return FALSE;
2758 
2759   if (!bfd_write_bigendian_4byte_int (arch, symbol_count))
2760     return FALSE;
2761 
2762   /* Two passes, first write the file offsets for each symbol -
2763      remembering that each offset is on a two byte boundary.  */
2764 
2765   /* Write out the file offset for the file associated with each
2766      symbol, and remember to keep the offsets padded out.  */
2767 
2768   current = arch->archive_head;
2769   count = 0;
2770   archive_member_file_ptr = first_archive_member_file_ptr;
2771   while (current != NULL && count < symbol_count)
2772     {
2773       /* For each symbol which is used defined in this object, write
2774 	 out the object file's address in the archive.  */
2775 
2776       while (count < symbol_count && map[count].u.abfd == current)
2777 	{
2778 	  unsigned int offset = (unsigned int) archive_member_file_ptr;
2779 
2780 	  /* Catch an attempt to grow an archive past its 4Gb limit.  */
2781 	  if (archive_member_file_ptr != (file_ptr) offset)
2782 	    {
2783 	      bfd_set_error (bfd_error_file_truncated);
2784 	      return FALSE;
2785 	    }
2786 	  if (!bfd_write_bigendian_4byte_int (arch, offset))
2787 	    return FALSE;
2788 	  count++;
2789 	}
2790       archive_member_file_ptr += sizeof (struct ar_hdr);
2791       if (! bfd_is_thin_archive (arch))
2792 	{
2793 	  /* Add size of this archive entry.  */
2794 	  archive_member_file_ptr += arelt_size (current);
2795 	  /* Remember about the even alignment.  */
2796 	  archive_member_file_ptr += archive_member_file_ptr % 2;
2797 	}
2798       current = current->archive_next;
2799     }
2800 
2801   /* Now write the strings themselves.  */
2802   for (count = 0; count < symbol_count; count++)
2803     {
2804       size_t len = strlen (*map[count].name) + 1;
2805 
2806       if (bfd_bwrite (*map[count].name, len, arch) != len)
2807 	return FALSE;
2808     }
2809 
2810   /* The spec sez this should be a newline.  But in order to be
2811      bug-compatible for arc960 we use a null.  */
2812   if (padit)
2813     {
2814       if (bfd_bwrite ("", 1, arch) != 1)
2815 	return FALSE;
2816     }
2817 
2818   return TRUE;
2819 }
2820 
2821 static int
archive_close_worker(void ** slot,void * inf ATTRIBUTE_UNUSED)2822 archive_close_worker (void **slot, void *inf ATTRIBUTE_UNUSED)
2823 {
2824   struct ar_cache *ent = (struct ar_cache *) *slot;
2825 
2826   bfd_close_all_done (ent->arbfd);
2827   return 1;
2828 }
2829 
2830 bfd_boolean
_bfd_archive_close_and_cleanup(bfd * abfd)2831 _bfd_archive_close_and_cleanup (bfd *abfd)
2832 {
2833   if (bfd_read_p (abfd) && abfd->format == bfd_archive)
2834     {
2835       bfd *nbfd;
2836       bfd *next;
2837       htab_t htab;
2838 
2839       /* Close nested archives (if this bfd is a thin archive).  */
2840       for (nbfd = abfd->nested_archives; nbfd; nbfd = next)
2841 	{
2842 	  next = nbfd->archive_next;
2843 	  bfd_close (nbfd);
2844 	}
2845 
2846       htab = bfd_ardata (abfd)->cache;
2847       if (htab)
2848 	{
2849 	  htab_traverse_noresize (htab, archive_close_worker, NULL);
2850 	  htab_delete (htab);
2851 	  bfd_ardata (abfd)->cache = NULL;
2852 	}
2853     }
2854   if (arch_eltdata (abfd) != NULL)
2855     {
2856       struct areltdata *ared = arch_eltdata (abfd);
2857       htab_t htab = (htab_t) ared->parent_cache;
2858 
2859       if (htab)
2860 	{
2861 	  struct ar_cache ent;
2862 	  void **slot;
2863 
2864 	  ent.ptr = ared->key;
2865 	  slot = htab_find_slot (htab, &ent, NO_INSERT);
2866 	  if (slot != NULL)
2867 	    {
2868 	      BFD_ASSERT (((struct ar_cache *) *slot)->arbfd == abfd);
2869 	      htab_clear_slot (htab, slot);
2870 	    }
2871 	}
2872     }
2873   if (abfd->is_linker_output)
2874     (*abfd->link.hash->hash_table_free) (abfd);
2875 
2876   return TRUE;
2877 }
2878