aboutsummaryrefslogtreecommitdiff
path: root/bfd/vms-misc.c
blob: 75cac636ea342d3c4e2ec9680bdadd2dcf621725 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
/* vms-misc.c -- BFD back-end for VMS/VAX (openVMS/VAX) and
   EVAX (openVMS/Alpha) files.
   Copyright (C) 1996-2023 Free Software Foundation, Inc.

   Miscellaneous functions.

   Written by Klaus K"ampf (kkaempf@rmi.de)

   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.  */

#if __STDC__
#include <stdarg.h>
#endif

#include "sysdep.h"
#include "bfd.h"
#include "bfdlink.h"
#include "libbfd.h"
#include "safe-ctype.h"

#ifdef VMS
#define __NEW_STARLET
#include <rms.h>
#include <unixlib.h>
#include <gen64def.h>
#include <starlet.h>
#define RME$C_SETRFM 0x00000001
#include <unistd.h>
#endif
#include <time.h>

#include "vms.h"
#include "vms/emh.h"

#if VMS_DEBUG
/* Debug functions.  */

/* Debug function for all vms extensions evaluates environment
   variable VMS_DEBUG for a numerical value on the first call all
   error levels below this value are printed:

   Levels:
   1	toplevel bfd calls (functions from the bfd vector)
   2	functions called by bfd calls
   ...
   9	almost everything

   Level is also indentation level. Indentation is performed
   if level > 0.  */

void
_bfd_vms_debug (int level, char *format, ...)
{
  static int min_level = -1;
  static FILE *output = NULL;
  char *eptr;
  va_list args;
  int abslvl = (level > 0) ? level : - level;

  if (min_level == -1)
    {
      if ((eptr = getenv ("VMS_DEBUG")) != NULL)
	{
	  min_level = atoi (eptr);
	  output = stderr;
	}
      else
	min_level = 0;
    }
  if (output == NULL)
    return;
  if (abslvl > min_level)
    return;

  while (--level > 0)
    fprintf (output, " ");
  va_start (args, format);
  vfprintf (output, format, args);
  fflush (output);
  va_end (args);
}

/* A debug function
   hex dump 'size' bytes starting at 'ptr'.  */

void
_bfd_hexdump (int level, unsigned char *ptr, int size, int offset)
{
  unsigned char *lptr = ptr;
  int count = 0;
  long start = offset;

  while (size-- > 0)
    {
      if ((count % 16) == 0)
	vms_debug (level, "%08lx:", start);
      vms_debug (-level, " %02x", *ptr++);
      count++;
      start++;
      if (size == 0)
	{
	  while ((count % 16) != 0)
	    {
	      vms_debug (-level, "   ");
	      count++;
	    }
	}
      if ((count % 16) == 0)
	{
	  vms_debug (-level, " ");
	  while (lptr < ptr)
	    {
	      vms_debug (-level, "%c", (*lptr < 32) ? '.' : *lptr);
	      lptr++;
	    }
	  vms_debug (-level, "\n");
	}
    }
  if ((count % 16) != 0)
    vms_debug (-level, "\n");
}
#endif


/* Copy sized string (string with fixed size) to new allocated area.
   Size is string size (size of record).  */

char *
_bfd_vms_save_sized_string (bfd *abfd, unsigned char *str, size_t size)
{
  char *newstr;

  if (size == (size_t) -1)
    {
      bfd_set_error (bfd_error_no_memory);
      return NULL;
    }
  newstr = bfd_alloc (abfd, size + 1);
  if (newstr == NULL)
    return NULL;
  memcpy (newstr, str, size);
  newstr[size] = 0;

  return newstr;
}

/* Copy counted string (string with size at first byte) to new allocated area.
   PTR points to size byte on entry.  */

char *
_bfd_vms_save_counted_string (bfd *abfd, unsigned char *ptr, size_t maxlen)
{
  unsigned int len;

  if (maxlen == 0)
    return NULL;
  len = *ptr++;
  if (len >  maxlen - 1)
    return NULL;
  return _bfd_vms_save_sized_string (abfd, ptr, len);
}

/* Object output routines.   */

/* Begin new record.
   Write 2 bytes rectype and 2 bytes record length.  */

void
_bfd_vms_output_begin (struct vms_rec_wr *recwr, int rectype)
{
  vms_debug2 ((6, "_bfd_vms_output_begin (type %d)\n", rectype));

  /* Record must have been closed.  */
  BFD_ASSERT (recwr->size == 0);

  _bfd_vms_output_short (recwr, (unsigned int) rectype);

  /* Placeholder for length.  */
  _bfd_vms_output_short (recwr, 0);
}

/* Begin new sub-record.
   Write 2 bytes rectype, and 2 bytes record length.  */

void
_bfd_vms_output_begin_subrec (struct vms_rec_wr *recwr, int rectype)
{
  vms_debug2 ((6, "_bfd_vms_output_begin_subrec (type %d)\n", rectype));

  /* Subrecord must have been closed.  */
  BFD_ASSERT (recwr->subrec_offset == 0);

  /* Save start of subrecord offset.  */
  recwr->subrec_offset = recwr->size;

  /* Subrecord type.  */
  _bfd_vms_output_short (recwr, (unsigned int) rectype);

  /* Placeholder for length.  */
  _bfd_vms_output_short (recwr, 0);
}

/* Set record/subrecord alignment.   */

void
_bfd_vms_output_alignment (struct vms_rec_wr *recwr, int alignto)
{
  vms_debug2 ((6, "_bfd_vms_output_alignment (%d)\n", alignto));
  recwr->align = alignto;
}

/* Align the size of the current record (whose length is LENGTH).
   Warning: this obviously changes the record (and the possible subrecord)
   length.  */

static void
_bfd_vms_output_align (struct vms_rec_wr *recwr, unsigned int length)
{
  unsigned int real_size = recwr->size;
  unsigned int aligncount;

  /* Pad with 0 if alignment is required.  */
  aligncount = (recwr->align - (length % recwr->align)) % recwr->align;
  vms_debug2 ((6, "align: adding %d bytes\n", aligncount));
  while (aligncount-- > 0)
    recwr->buf[real_size++] = 0;

  recwr->size = real_size;
}

/* Ends current sub-record.  Set length field.  */

void
_bfd_vms_output_end_subrec (struct vms_rec_wr *recwr)
{
  int real_size = recwr->size;
  int length;

  /* Subrecord must be open.  */
  BFD_ASSERT (recwr->subrec_offset != 0);

  length = real_size - recwr->subrec_offset;

  if (length == 0)
    return;

  _bfd_vms_output_align (recwr, length);

  /* Put length to buffer.  */
  bfd_putl16 ((bfd_vma) (recwr->size - recwr->subrec_offset),
	      recwr->buf + recwr->subrec_offset + 2);

  /* Close the subrecord.  */
  recwr->subrec_offset = 0;
}

/* Ends current record (and write it).  */

bool
_bfd_vms_output_end (bfd *abfd, struct vms_rec_wr *recwr)
{
  vms_debug2 ((6, "_bfd_vms_output_end (size %u)\n", recwr->size));

  /* Subrecord must have been closed.  */
  BFD_ASSERT (recwr->subrec_offset == 0);

  if (recwr->size == 0)
    return true;

  _bfd_vms_output_align (recwr, recwr->size);

  /* Write the length word.  */
  bfd_putl16 ((bfd_vma) recwr->size, recwr->buf + 2);

  /* File is open in undefined (UDF) format on VMS, but ultimately will be
     converted to variable length (VAR) format.  VAR format has a length
     word first which must be explicitly output in UDF format.  */
  /* So, first the length word.  */
  if (bfd_write (recwr->buf + 2, 2, abfd) != 2)
    return false;

  /* Align.  */
  if (recwr->size & 1)
    recwr->buf[recwr->size++] = 0;

  /* Then the record.  */
  if (bfd_write (recwr->buf, (size_t) recwr->size, abfd)
      != (size_t) recwr->size)
    return false;

  recwr->size = 0;
  return true;
}

/* Check remaining buffer size.  Return what's left.  */

int
_bfd_vms_output_check (struct vms_rec_wr *recwr, int size)
{
  vms_debug2 ((6, "_bfd_vms_output_check (%d)\n", size));

  return (MAX_OUTREC_SIZE - (recwr->size + size + MIN_OUTREC_LUFT));
}

/* Output byte (8 bit) value.  */

void
_bfd_vms_output_byte (struct vms_rec_wr *recwr, unsigned int value)
{
  vms_debug2 ((6, "_bfd_vms_output_byte (%02x)\n", value));

  *(recwr->buf + recwr->size) = value;
  recwr->size += 1;
}

/* Output short (16 bit) value.  */

void
_bfd_vms_output_short (struct vms_rec_wr *recwr, unsigned int value)
{
  vms_debug2 ((6, "_bfd_vms_output_short (%04x)\n", value));

  bfd_putl16 ((bfd_vma) value & 0xffff, recwr->buf + recwr->size);
  recwr->size += 2;
}

/* Output long (32 bit) value.  */

void
_bfd_vms_output_long (struct vms_rec_wr *recwr, unsigned long value)
{
  vms_debug2 ((6, "_bfd_vms_output_long (%08lx)\n", value));

  bfd_putl32 ((bfd_vma) value, recwr->buf + recwr->size);
  recwr->size += 4;
}

/* Output quad (64 bit) value.  */

void
_bfd_vms_output_quad (struct vms_rec_wr *recwr, bfd_vma value)
{
  vms_debug2 ((6, "_bfd_vms_output_quad (%08lx)\n", (unsigned long)value));

  bfd_putl64 (value, recwr->buf + recwr->size);
  recwr->size += 8;
}

/* Output c-string as counted string.  */

void
_bfd_vms_output_counted (struct vms_rec_wr *recwr, const char *value)
{
  int len;

  vms_debug2 ((6, "_bfd_vms_output_counted (%s)\n", value));

  len = strlen (value);
  if (len == 0)
    {
      _bfd_error_handler (_("_bfd_vms_output_counted called with zero bytes"));
      return;
    }
  if (len > 255)
    {
      _bfd_error_handler (_("_bfd_vms_output_counted called with too many bytes"));
      return;
    }
  _bfd_vms_output_byte (recwr, (unsigned int) len & 0xff);
  _bfd_vms_output_dump (recwr, (const unsigned char *)value, len);
}

/* Output character area.  */

void
_bfd_vms_output_dump (struct vms_rec_wr *recwr, const unsigned char *data, int len)
{
  vms_debug2 ((6, "_bfd_vms_output_dump (%d)\n", len));

  if (len == 0)
    return;

  memcpy (recwr->buf + recwr->size, data, (size_t) len);
  recwr->size += len;
}

/* Output count bytes of value.  */

void
_bfd_vms_output_fill (struct vms_rec_wr *recwr, int value, int count)
{
  vms_debug2 ((6, "_bfd_vms_output_fill (val %02x times %d)\n", value, count));

  if (count == 0)
    return;
  memset (recwr->buf + recwr->size, value, (size_t) count);
  recwr->size += count;
}

#ifdef VMS
/* Convert the file to variable record length format. This is done
   using undocumented system call sys$modify().
   Pure VMS version.  */

static void
vms_convert_to_var (char * vms_filename)
{
  struct FAB fab = cc$rms_fab;

  fab.fab$l_fna = vms_filename;
  fab.fab$b_fns = strlen (vms_filename);
  fab.fab$b_fac = FAB$M_PUT;
  fab.fab$l_fop = FAB$M_ESC;
  fab.fab$l_ctx = RME$C_SETRFM;

  sys$open (&fab);

  fab.fab$b_rfm = FAB$C_VAR;

  sys$modify (&fab);
  sys$close (&fab);
}

static int
vms_convert_to_var_1 (char *filename, int type)
{
  if (type != DECC$K_FILE)
    return false;
  vms_convert_to_var (filename);
  return true;
}

/* Convert the file to variable record length format. This is done
   using undocumented system call sys$modify().
   Unix filename version.  */

int
_bfd_vms_convert_to_var_unix_filename (const char *unix_filename)
{
  if (decc$to_vms (unix_filename, &vms_convert_to_var_1, 0, 1) != 1)
    return false;
  return true;
}
#endif /* VMS */

/* Manufacture a VMS like time on a unix based system.
   stolen from obj-vms.c.  */

unsigned char *
get_vms_time_string (unsigned char *tbuf)
{
#ifndef VMS
  char *pnt;
  time_t timeb;

  time (& timeb);
  pnt = ctime (&timeb);
  pnt[3] = 0;
  pnt[7] = 0;
  pnt[10] = 0;
  pnt[16] = 0;
  pnt[24] = 0;
  sprintf ((char *) tbuf, "%2s-%3s-%s %s",
	   pnt + 8, pnt + 4, pnt + 20, pnt + 11);
#else
  struct
  {
    int Size;
    unsigned char *Ptr;
  } Descriptor;
  Descriptor.Size = 17;
  Descriptor.Ptr = tbuf;
  SYS$ASCTIM (0, &Descriptor, 0, 0);
#endif /* not VMS */

  vms_debug2 ((6, "vmstimestring:'%s'\n", tbuf));

  return tbuf;
}

/* Create module name from filename (ie, extract the basename and convert it
   in upper cases).  Works on both VMS and UNIX pathes.
   The result has to be free().  */

char *
vms_get_module_name (const char *filename, bool upcase)
{
  char *fname, *fptr;
  const char *fout;

  /* Strip VMS path.  */
  fout = strrchr (filename, ']');
  if (fout == NULL)
    fout = strchr (filename, ':');
  if (fout != NULL)
    fout++;
  else
    fout = filename;

  /* Strip UNIX path.  */
  fptr = strrchr (fout, '/');
  if (fptr != NULL)
    fout = fptr + 1;

  fname = strdup (fout);

  /* Strip suffix.  */
  fptr = strrchr (fname, '.');
  if (fptr != 0)
    *fptr = 0;

  /* Convert to upper case and truncate at 31 characters.
     (VMS object file format restricts module name length to 31).  */
  fptr = fname;
  for (fptr = fname; *fptr != 0; fptr++)
    {
      if (*fptr == ';' || (fptr - fname) >= 31)
	{
	  *fptr = 0;
	  break;
	}
      if (upcase)
	*fptr = TOUPPER (*fptr);
    }
  return fname;
}

/* Compared to usual UNIX time_t, VMS time has less limits:
   -  64 bit (63 bits in fact as the MSB must be 0)
   -  100ns granularity
   -  epoch is Nov 17, 1858.
   Here has the constants and the routines used to convert VMS from/to UNIX time.
   The conversion routines don't assume 64 bits arithmetic.

   Here we assume that the definition of time_t is the UNIX one, ie integer
   type, expressing seconds since the epoch.  */

/* UNIX time granularity for VMS, ie 1s / 100ns.  */
#define VMS_TIME_FACTOR 10000000

/* Number of seconds since VMS epoch of the UNIX epoch.  */
#define VMS_TIME_OFFSET 3506716800U

/* Convert a VMS time to a unix time.  */

time_t
vms_time_to_time_t (unsigned int hi, unsigned int lo)
{
  unsigned int tmp;
  unsigned int rlo;
  int i;
  time_t res;

  /* First convert to seconds.  */
  tmp = hi % VMS_TIME_FACTOR;
  hi = hi / VMS_TIME_FACTOR;
  rlo = 0;
  for (i = 0; i < 4; i++)
    {
      tmp = (tmp << 8) | (lo >> 24);
      lo <<= 8;

      rlo = (rlo << 8) | (tmp / VMS_TIME_FACTOR);
      tmp %= VMS_TIME_FACTOR;
    }
  lo = rlo;

  /* Return 0 in case of overflow.  */
  if (hi > 1
      || (hi == 1 && lo >= VMS_TIME_OFFSET))
    return 0;

  /* Return 0 in case of underflow.  */
  if (hi == 0 && lo < VMS_TIME_OFFSET)
    return 0;

  res = lo - VMS_TIME_OFFSET;
  if (res <= 0)
    return 0;
  return res;
}

/* Convert a time_t to a VMS time.  */

void
vms_time_t_to_vms_time (time_t ut, unsigned int *hi, unsigned int *lo)
{
  unsigned int val[4];
  unsigned int tmp[4];
  unsigned int carry;
  int i;

  /* Put into val.  */
  val[0] = ut & 0xffff;
  val[1] = (ut >> 16) & 0xffff;
  val[2] = sizeof (ut) > 4 ? (ut >> 32) & 0xffff : 0;
  val[3] = sizeof (ut) > 4 ? (ut >> 48) & 0xffff : 0;

  /* Add offset.  */
  tmp[0] = VMS_TIME_OFFSET & 0xffff;
  tmp[1] = VMS_TIME_OFFSET >> 16;
  tmp[2] = 0;
  tmp[3] = 0;
  carry = 0;
  for (i = 0; i < 4; i++)
    {
      carry += tmp[i] + val[i];
      val[i] = carry & 0xffff;
      carry = carry >> 16;
    }

  /* Multiply by factor, well first by 10000 and then by 1000.  */
  carry = 0;
  for (i = 0; i < 4; i++)
    {
      carry += val[i] * 10000;
      val[i] = carry & 0xffff;
      carry = carry >> 16;
    }
  carry = 0;
  for (i = 0; i < 4; i++)
    {
      carry += val[i] * 1000;
      val[i] = carry & 0xffff;
      carry = carry >> 16;
    }

  /* Write the result.  */
  *lo = val[0] | (val[1] << 16);
  *hi = val[2] | (val[3] << 16);
}

/* Convert a raw (stored in a buffer) VMS time to a unix time.  */

time_t
vms_rawtime_to_time_t (unsigned char *buf)
{
  unsigned int hi = bfd_getl32 (buf + 4);
  unsigned int lo = bfd_getl32 (buf + 0);

  return vms_time_to_time_t (hi, lo);
}

void
vms_get_time (unsigned int *hi, unsigned int *lo)
{
#ifdef VMS
  struct _generic_64 t;

  sys$gettim (&t);
  *lo = t.gen64$q_quadword;
  *hi = t.gen64$q_quadword >> 32;
#else
  time_t t;

  time (&t);
  vms_time_t_to_vms_time (t, hi, lo);
#endif
}

/* Get the current time into a raw buffer BUF.  */

void
vms_raw_get_time (unsigned char *buf)
{
  unsigned int hi, lo;

  vms_get_time (&hi, &lo);
  bfd_putl32 (lo, buf + 0);
  bfd_putl32 (hi, buf + 4);
}