aboutsummaryrefslogtreecommitdiff
path: root/binutils/bucomm.c
blob: 4621e601bafa3c4d12735dd69c16fbc3f7b436f0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
/* bucomm.c -- Bin Utils COMmon code.
   Copyright (C) 1991-2015 Free Software Foundation, Inc.

   This file is part of GNU Binutils.

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

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

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
   02110-1301, USA.  */

/* We might put this in a library someday so it could be dynamically
   loaded, but for now it's not necessary.  */

#include "sysdep.h"
#include "bfd.h"
#include "libiberty.h"
#include "filenames.h"
#include "libbfd.h"

#include <time.h>		/* ctime, maybe time_t */
#include <assert.h>
#include "bucomm.h"

#ifndef HAVE_TIME_T_IN_TIME_H
#ifndef HAVE_TIME_T_IN_TYPES_H
typedef long time_t;
#endif
#endif

static const char * endian_string (enum bfd_endian);
static int display_target_list (void);
static int display_info_table (int, int);
static int display_target_tables (void);

/* Error reporting.  */

char *program_name;

void
bfd_nonfatal (const char *string)
{
  const char *errmsg;

  errmsg = bfd_errmsg (bfd_get_error ());
  fflush (stdout);
  if (string)
    fprintf (stderr, "%s: %s: %s\n", program_name, string, errmsg);
  else
    fprintf (stderr, "%s: %s\n", program_name, errmsg);
}

/* Issue a non fatal error message.  FILENAME, or if NULL then BFD,
   are used to indicate the problematic file.  SECTION, if non NULL,
   is used to provide a section name.  If FORMAT is non-null, then it
   is used to print additional information via vfprintf.  Finally the
   bfd error message is printed.  In summary, error messages are of
   one of the following forms:

   PROGRAM:file: bfd-error-message
   PROGRAM:file[section]: bfd-error-message
   PROGRAM:file: printf-message: bfd-error-message
   PROGRAM:file[section]: printf-message: bfd-error-message.  */

void
bfd_nonfatal_message (const char *filename,
		      const bfd *abfd,
		      const asection *section,
		      const char *format, ...)
{
  const char *errmsg;
  const char *section_name;
  va_list args;

  errmsg = bfd_errmsg (bfd_get_error ());
  fflush (stdout);
  section_name = NULL;
  va_start (args, format);
  fprintf (stderr, "%s", program_name);

  if (abfd)
    {
      if (!filename)
	filename = bfd_get_archive_filename (abfd);
      if (section)
	section_name = bfd_get_section_name (abfd, section);
    }
  if (section_name)
    fprintf (stderr, ":%s[%s]", filename, section_name);
  else
    fprintf (stderr, ":%s", filename);

  if (format)
    {
      fprintf (stderr, ": ");
      vfprintf (stderr, format, args);
    }
  fprintf (stderr, ": %s\n", errmsg);
  va_end (args);
}

void
bfd_fatal (const char *string)
{
  bfd_nonfatal (string);
  xexit (1);
}

void
report (const char * format, va_list args)
{
  fflush (stdout);
  fprintf (stderr, "%s: ", program_name);
  vfprintf (stderr, format, args);
  putc ('\n', stderr);
}

void
fatal (const char *format, ...)
{
  va_list args;

  va_start (args, format);

  report (format, args);
  va_end (args);
  xexit (1);
}

void
non_fatal (const char *format, ...)
{
  va_list args;

  va_start (args, format);

  report (format, args);
  va_end (args);
}

/* Set the default BFD target based on the configured target.  Doing
   this permits the binutils to be configured for a particular target,
   and linked against a shared BFD library which was configured for a
   different target.  */

void
set_default_bfd_target (void)
{
  /* The macro TARGET is defined by Makefile.  */
  const char *target = TARGET;

  if (! bfd_set_default_target (target))
    fatal (_("can't set BFD default target to `%s': %s"),
	   target, bfd_errmsg (bfd_get_error ()));
}

/* After a FALSE return from bfd_check_format_matches with
   bfd_get_error () == bfd_error_file_ambiguously_recognized, print
   the possible matching targets.  */

void
list_matching_formats (char **p)
{
  fflush (stdout);
  fprintf (stderr, _("%s: Matching formats:"), program_name);
  while (*p)
    fprintf (stderr, " %s", *p++);
  fputc ('\n', stderr);
}

/* List the supported targets.  */

void
list_supported_targets (const char *name, FILE *f)
{
  int t;
  const char **targ_names;

  if (name == NULL)
    fprintf (f, _("Supported targets:"));
  else
    fprintf (f, _("%s: supported targets:"), name);

  targ_names = bfd_target_list ();
  for (t = 0; targ_names[t] != NULL; t++)
    fprintf (f, " %s", targ_names[t]);
  fprintf (f, "\n");
  free (targ_names);
}

/* List the supported architectures.  */

void
list_supported_architectures (const char *name, FILE *f)
{
  const char ** arch;
  const char ** arches;

  if (name == NULL)
    fprintf (f, _("Supported architectures:"));
  else
    fprintf (f, _("%s: supported architectures:"), name);

  for (arch = arches = bfd_arch_list (); *arch; arch++)
    fprintf (f, " %s", *arch);
  fprintf (f, "\n");
  free (arches);
}

/* The length of the longest architecture name + 1.  */
#define LONGEST_ARCH sizeof ("powerpc:common")

static const char *
endian_string (enum bfd_endian endian)
{
  switch (endian)
    {
    case BFD_ENDIAN_BIG: return _("big endian");
    case BFD_ENDIAN_LITTLE: return _("little endian");
    default: return _("endianness unknown");
    }
}

/* List the targets that BFD is configured to support, each followed
   by its endianness and the architectures it supports.  */

static int
display_target_list (void)
{
  char *dummy_name;
  int t;
  int ret = 1;

  dummy_name = make_temp_file (NULL);
  for (t = 0; bfd_target_vector[t]; t++)
    {
      const bfd_target *p = bfd_target_vector[t];
      bfd *abfd = bfd_openw (dummy_name, p->name);
      int a;

      printf (_("%s\n (header %s, data %s)\n"), p->name,
	      endian_string (p->header_byteorder),
	      endian_string (p->byteorder));

      if (abfd == NULL)
	{
          bfd_nonfatal (dummy_name);
          ret = 0;
	  continue;
	}

      if (! bfd_set_format (abfd, bfd_object))
	{
	  if (bfd_get_error () != bfd_error_invalid_operation)
            {
	      bfd_nonfatal (p->name);
              ret = 0;
            }
	  bfd_close_all_done (abfd);
	  continue;
	}

      for (a = bfd_arch_obscure + 1; a < bfd_arch_last; a++)
	if (bfd_set_arch_mach (abfd, (enum bfd_architecture) a, 0))
	  printf ("  %s\n",
		  bfd_printable_arch_mach ((enum bfd_architecture) a, 0));
      bfd_close_all_done (abfd);
    }
  unlink (dummy_name);
  free (dummy_name);

  return ret;
}

/* Print a table showing which architectures are supported for entries
   FIRST through LAST-1 of bfd_target_vector (targets across,
   architectures down).  */

static int
display_info_table (int first, int last)
{
  int t;
  int ret = 1;
  char *dummy_name;
  int a;

  /* Print heading of target names.  */
  printf ("\n%*s", (int) LONGEST_ARCH, " ");
  for (t = first; t < last && bfd_target_vector[t]; t++)
    printf ("%s ", bfd_target_vector[t]->name);
  putchar ('\n');

  dummy_name = make_temp_file (NULL);
  for (a = bfd_arch_obscure + 1; a < bfd_arch_last; a++)
    if (strcmp (bfd_printable_arch_mach ((enum bfd_architecture) a, 0),
                "UNKNOWN!") != 0)
      {
	printf ("%*s ", (int) LONGEST_ARCH - 1,
		bfd_printable_arch_mach ((enum bfd_architecture) a, 0));
	for (t = first; t < last && bfd_target_vector[t]; t++)
	  {
	    const bfd_target *p = bfd_target_vector[t];
	    bfd_boolean ok = TRUE;
	    bfd *abfd = bfd_openw (dummy_name, p->name);

	    if (abfd == NULL)
	      {
		bfd_nonfatal (p->name);
                ret = 0;
		ok = FALSE;
	      }

	    if (ok)
	      {
		if (! bfd_set_format (abfd, bfd_object))
		  {
		    if (bfd_get_error () != bfd_error_invalid_operation)
                      {
		        bfd_nonfatal (p->name);
                        ret = 0;
                      }
		    ok = FALSE;
		  }
	      }

	    if (ok)
	      {
		if (! bfd_set_arch_mach (abfd, (enum bfd_architecture) a, 0))
		  ok = FALSE;
	      }

	    if (ok)
	      printf ("%s ", p->name);
	    else
	      {
		int l = strlen (p->name);
		while (l--)
		  putchar ('-');
		putchar (' ');
	      }
	    if (abfd != NULL)
	      bfd_close_all_done (abfd);
	  }
	putchar ('\n');
      }
  unlink (dummy_name);
  free (dummy_name);

  return ret;
}

/* Print tables of all the target-architecture combinations that
   BFD has been configured to support.  */

static int
display_target_tables (void)
{
  int t;
  int columns;
  int ret = 1;
  char *colum;

  columns = 0;
  colum = getenv ("COLUMNS");
  if (colum != NULL)
    columns = atoi (colum);
  if (columns == 0)
    columns = 80;

  t = 0;
  while (bfd_target_vector[t] != NULL)
    {
      int oldt = t, wid;

      wid = LONGEST_ARCH + strlen (bfd_target_vector[t]->name) + 1;
      ++t;
      while (wid < columns && bfd_target_vector[t] != NULL)
	{
	  int newwid;

	  newwid = wid + strlen (bfd_target_vector[t]->name) + 1;
	  if (newwid >= columns)
	    break;
	  wid = newwid;
	  ++t;
	}
      if (! display_info_table (oldt, t))
        ret = 0;
    }

  return ret;
}

int
display_info (void)
{
  printf (_("BFD header file version %s\n"), BFD_VERSION_STRING);
  if (! display_target_list () || ! display_target_tables ())
    return 1;
  else
    return 0;
}

/* Display the archive header for an element as if it were an ls -l listing:

   Mode       User\tGroup\tSize\tDate               Name */

void
print_arelt_descr (FILE *file, bfd *abfd, bfd_boolean verbose)
{
  struct stat buf;

  if (verbose)
    {
      if (bfd_stat_arch_elt (abfd, &buf) == 0)
	{
	  char modebuf[11];
	  char timebuf[40];
	  time_t when = buf.st_mtime;
	  const char *ctime_result = (const char *) ctime (&when);
	  bfd_size_type size;

	  /* PR binutils/17605: Check for corrupt time values.  */
	  if (ctime_result == NULL)
	    sprintf (timebuf, _("<time data corrupt>"));
	  else
	    /* POSIX format:  skip weekday and seconds from ctime output.  */
	    sprintf (timebuf, "%.12s %.4s", ctime_result + 4, ctime_result + 20);

	  mode_string (buf.st_mode, modebuf);
	  modebuf[10] = '\0';
	  size = buf.st_size;
	  /* POSIX 1003.2/D11 says to skip first character (entry type).  */
	  fprintf (file, "%s %ld/%ld %6" BFD_VMA_FMT "u %s ", modebuf + 1,
		   (long) buf.st_uid, (long) buf.st_gid,
		   size, timebuf);
	}
    }

  fprintf (file, "%s\n", bfd_get_filename (abfd));
}

/* Return a path for a new temporary file in the same directory
   as file PATH.  */

static char *
template_in_dir (const char *path)
{
#define template "stXXXXXX"
  const char *slash = strrchr (path, '/');
  char *tmpname;
  size_t len;

#ifdef HAVE_DOS_BASED_FILE_SYSTEM
  {
    /* We could have foo/bar\\baz, or foo\\bar, or d:bar.  */
    char *bslash = strrchr (path, '\\');

    if (slash == NULL || (bslash != NULL && bslash > slash))
      slash = bslash;
    if (slash == NULL && path[0] != '\0' && path[1] == ':')
      slash = path + 1;
  }
#endif

  if (slash != (char *) NULL)
    {
      len = slash - path;
      tmpname = (char *) xmalloc (len + sizeof (template) + 2);
      memcpy (tmpname, path, len);

#ifdef HAVE_DOS_BASED_FILE_SYSTEM
      /* If tmpname is "X:", appending a slash will make it a root
	 directory on drive X, which is NOT the same as the current
	 directory on drive X.  */
      if (len == 2 && tmpname[1] == ':')
	tmpname[len++] = '.';
#endif
      tmpname[len++] = '/';
    }
  else
    {
      tmpname = (char *) xmalloc (sizeof (template));
      len = 0;
    }

  memcpy (tmpname + len, template, sizeof (template));
  return tmpname;
#undef template
}

/* Return the name of a created temporary file in the same directory
   as FILENAME.  */

char *
make_tempname (char *filename)
{
  char *tmpname = template_in_dir (filename);
  int fd;

#ifdef HAVE_MKSTEMP
  fd = mkstemp (tmpname);
#else
  tmpname = mktemp (tmpname);
  if (tmpname == NULL)
    return NULL;
  fd = open (tmpname, O_RDWR | O_CREAT | O_EXCL, 0600);
#endif
  if (fd == -1)
    {
      free (tmpname);
      return NULL;
    }
  close (fd);
  return tmpname;
}

/* Return the name of a created temporary directory inside the
   directory containing FILENAME.  */

char *
make_tempdir (char *filename)
{
  char *tmpname = template_in_dir (filename);

#ifdef HAVE_MKDTEMP
  return mkdtemp (tmpname);
#else
  tmpname = mktemp (tmpname);
  if (tmpname == NULL)
    return NULL;
#if defined (_WIN32) && !defined (__CYGWIN32__)
  if (mkdir (tmpname) != 0)
    return NULL;
#else
  if (mkdir (tmpname, 0700) != 0)
    return NULL;
#endif
  return tmpname;
#endif
}

/* Parse a string into a VMA, with a fatal error if it can't be
   parsed.  */

bfd_vma
parse_vma (const char *s, const char *arg)
{
  bfd_vma ret;
  const char *end;

  ret = bfd_scan_vma (s, &end, 0);

  if (*end != '\0')
    fatal (_("%s: bad number: %s"), arg, s);

  return ret;
}

/* Returns the size of the named file.  If the file does not
   exist, or if it is not a real file, then a suitable non-fatal
   error message is printed and (off_t) -1 is returned.  */

off_t
get_file_size (const char * file_name)
{
  struct stat statbuf;

  if (stat (file_name, &statbuf) < 0)
    {
      if (errno == ENOENT)
	non_fatal (_("'%s': No such file"), file_name);
      else
	non_fatal (_("Warning: could not locate '%s'.  reason: %s"),
		   file_name, strerror (errno));
    }
  else if (! S_ISREG (statbuf.st_mode))
    non_fatal (_("Warning: '%s' is not an ordinary file"), file_name);
  else if (statbuf.st_size < 0)
    non_fatal (_("Warning: '%s' has negative size, probably it is too large"),
               file_name);
  else
    return statbuf.st_size;

  return (off_t) -1;
}

/* Return the filename in a static buffer.  */

const char *
bfd_get_archive_filename (const bfd *abfd)
{
  static size_t curr = 0;
  static char *buf;
  size_t needed;

  assert (abfd != NULL);

  if (!abfd->my_archive)
    return bfd_get_filename (abfd);

  needed = (strlen (bfd_get_filename (abfd->my_archive))
	    + strlen (bfd_get_filename (abfd)) + 3);
  if (needed > curr)
    {
      if (curr)
	free (buf);
      curr = needed + (needed >> 1);
      buf = (char *) bfd_malloc (curr);
      /* If we can't malloc, fail safe by returning just the file name.
	 This function is only used when building error messages.  */
      if (!buf)
	{
	  curr = 0;
	  return bfd_get_filename (abfd);
	}
    }
  sprintf (buf, "%s(%s)", bfd_get_filename (abfd->my_archive),
	   bfd_get_filename (abfd));
  return buf;
}

/* Returns TRUE iff PATHNAME, a filename of an archive member,
   is valid for writing.  For security reasons absolute paths
   and paths containing /../ are not allowed.  See PR 17533.  */

bfd_boolean
is_valid_archive_path (char const * pathname)
{
  const char * n = pathname;

  if (IS_ABSOLUTE_PATH (n))
    return FALSE;

  while (*n)
    {
      if (*n == '.' && *++n == '.' && ( ! *++n || IS_DIR_SEPARATOR (*n)))
	return FALSE;

      while (*n && ! IS_DIR_SEPARATOR (*n))
	n++;
      while (IS_DIR_SEPARATOR (*n))
	n++;
    }

  return TRUE;
}