OpenCores
URL https://opencores.org/ocsvn/openrisc/openrisc/trunk

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [gnu-stable/] [gdb-7.2/] [opcodes/] [m68k-dis.c] - Blame information for rev 835

Go to most recent revision | Details | Compare with Previous | View Log

Line No. Rev Author Line
1 330 jeremybenn
/* Print Motorola 68k instructions.
2
   Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
3
   1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
4
   Free Software Foundation, Inc.
5
 
6
   This file is part of the GNU opcodes library.
7
 
8
   This library is free software; you can redistribute it and/or modify
9
   it under the terms of the GNU General Public License as published by
10
   the Free Software Foundation; either version 3, or (at your option)
11
   any later version.
12
 
13
   It is distributed in the hope that it will be useful, but WITHOUT
14
   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15
   or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
16
   License for more details.
17
 
18
   You should have received a copy of the GNU General Public License
19
   along with this program; if not, write to the Free Software
20
   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21
   MA 02110-1301, USA.  */
22
 
23
#include "sysdep.h"
24
#include "dis-asm.h"
25
#include "floatformat.h"
26
#include "libiberty.h"
27
#include "opintl.h"
28
 
29
#include "opcode/m68k.h"
30
 
31
/* Local function prototypes.  */
32
 
33
const char * const fpcr_names[] =
34
{
35
  "", "%fpiar", "%fpsr", "%fpiar/%fpsr", "%fpcr",
36
  "%fpiar/%fpcr", "%fpsr/%fpcr", "%fpiar/%fpsr/%fpcr"
37
};
38
 
39
static char *const reg_names[] =
40
{
41
  "%d0", "%d1", "%d2", "%d3", "%d4", "%d5", "%d6", "%d7",
42
  "%a0", "%a1", "%a2", "%a3", "%a4", "%a5", "%fp", "%sp",
43
  "%ps", "%pc"
44
};
45
 
46
/* Name of register halves for MAC/EMAC.
47
   Seperate from reg_names since 'spu', 'fpl' look weird.  */
48
static char *const reg_half_names[] =
49
{
50
  "%d0", "%d1", "%d2", "%d3", "%d4", "%d5", "%d6", "%d7",
51
  "%a0", "%a1", "%a2", "%a3", "%a4", "%a5", "%a6", "%a7",
52
  "%ps", "%pc"
53
};
54
 
55
/* Sign-extend an (unsigned char).  */
56
#if __STDC__ == 1
57
#define COERCE_SIGNED_CHAR(ch) ((signed char) (ch))
58
#else
59
#define COERCE_SIGNED_CHAR(ch) ((int) (((ch) ^ 0x80) & 0xFF) - 128)
60
#endif
61
 
62
/* Get a 1 byte signed integer.  */
63
#define NEXTBYTE(p, val)                        \
64
  do                                            \
65
    {                                           \
66
      p += 2;                                   \
67
      if (!FETCH_DATA (info, p))                \
68
        return -3;                              \
69
      val = COERCE_SIGNED_CHAR (p[-1]);         \
70
    }                                           \
71
  while (0)
72
 
73
/* Get a 2 byte signed integer.  */
74
#define COERCE16(x) ((int) (((x) ^ 0x8000) - 0x8000))
75
 
76
#define NEXTWORD(p, val, ret_val)               \
77
  do                                            \
78
    {                                           \
79
      p += 2;                                   \
80
      if (!FETCH_DATA (info, p))                \
81
        return ret_val;                         \
82
      val = COERCE16 ((p[-2] << 8) + p[-1]);    \
83
    }                                           \
84
  while (0)
85
 
86
/* Get a 4 byte signed integer.  */
87
#define COERCE32(x) ((bfd_signed_vma) ((x) ^ 0x80000000) - 0x80000000)
88
 
89
#define NEXTLONG(p, val, ret_val)                                       \
90
  do                                                                    \
91
    {                                                                   \
92
      p += 4;                                                           \
93
      if (!FETCH_DATA (info, p))                                        \
94
        return ret_val;                                                 \
95
      val = COERCE32 ((((((p[-4] << 8) + p[-3]) << 8) + p[-2]) << 8) + p[-1]); \
96
    }                                                                   \
97
  while (0)
98
 
99
/* Get a 4 byte unsigned integer.  */
100
#define NEXTULONG(p, val)                                               \
101
  do                                                                    \
102
    {                                                                   \
103
      p += 4;                                                           \
104
      if (!FETCH_DATA (info, p))                                        \
105
        return -3;                                                      \
106
      val = (unsigned int) ((((((p[-4] << 8) + p[-3]) << 8) + p[-2]) << 8) + p[-1]); \
107
    }                                                                   \
108
  while (0)
109
 
110
/* Get a single precision float.  */
111
#define NEXTSINGLE(val, p)                                      \
112
  do                                                            \
113
    {                                                           \
114
      p += 4;                                                   \
115
      if (!FETCH_DATA (info, p))                                \
116
        return -3;                                              \
117
      floatformat_to_double (& floatformat_ieee_single_big,     \
118
                             (char *) p - 4, & val);            \
119
    }                                                           \
120
  while (0)
121
 
122
/* Get a double precision float.  */
123
#define NEXTDOUBLE(val, p)                                      \
124
  do                                                            \
125
    {                                                           \
126
      p += 8;                                                   \
127
      if (!FETCH_DATA (info, p))                                \
128
        return -3;                                              \
129
      floatformat_to_double (& floatformat_ieee_double_big,     \
130
                             (char *) p - 8, & val);            \
131
    }                                                           \
132
  while (0)
133
 
134
/* Get an extended precision float.  */
135
#define NEXTEXTEND(val, p)                              \
136
  do                                                    \
137
    {                                                   \
138
      p += 12;                                          \
139
      if (!FETCH_DATA (info, p))                        \
140
        return -3;                                      \
141
      floatformat_to_double (& floatformat_m68881_ext,  \
142
                             (char *) p - 12, & val);   \
143
    }                                                   \
144
  while (0)
145
 
146
/* Need a function to convert from packed to double
147
   precision.   Actually, it's easier to print a
148
   packed number than a double anyway, so maybe
149
   there should be a special case to handle this... */
150
#define NEXTPACKED(p, val)                      \
151
  do                                            \
152
    {                                           \
153
      p += 12;                                  \
154
      if (!FETCH_DATA (info, p))                \
155
        return -3;                              \
156
      val = 0.0;                                \
157
    }                                           \
158
  while (0)
159
 
160
 
161
/* Maximum length of an instruction.  */
162
#define MAXLEN 22
163
 
164
#include <setjmp.h>
165
 
166
struct private
167
{
168
  /* Points to first byte not fetched.  */
169
  bfd_byte *max_fetched;
170
  bfd_byte the_buffer[MAXLEN];
171
  bfd_vma insn_start;
172
};
173
 
174
/* Make sure that bytes from INFO->PRIVATE_DATA->BUFFER (inclusive)
175
   to ADDR (exclusive) are valid.  Returns 1 for success, 0 on error.  */
176
#define FETCH_DATA(info, addr) \
177
  ((addr) <= ((struct private *) (info->private_data))->max_fetched \
178
   ? 1 : fetch_data ((info), (addr)))
179
 
180
static int
181
fetch_data (struct disassemble_info *info, bfd_byte *addr)
182
{
183
  int status;
184
  struct private *priv = (struct private *)info->private_data;
185
  bfd_vma start = priv->insn_start + (priv->max_fetched - priv->the_buffer);
186
 
187
  status = (*info->read_memory_func) (start,
188
                                      priv->max_fetched,
189
                                      addr - priv->max_fetched,
190
                                      info);
191
  if (status != 0)
192
    {
193
      (*info->memory_error_func) (status, start, info);
194
      return 0;
195
    }
196
  else
197
    priv->max_fetched = addr;
198
  return 1;
199
}
200
 
201
/* This function is used to print to the bit-bucket.  */
202
static int
203
dummy_printer (FILE *file ATTRIBUTE_UNUSED,
204
               const char *format ATTRIBUTE_UNUSED,
205
               ...)
206
{
207
  return 0;
208
}
209
 
210
static void
211
dummy_print_address (bfd_vma vma ATTRIBUTE_UNUSED,
212
                     struct disassemble_info *info ATTRIBUTE_UNUSED)
213
{
214
}
215
 
216
/* Fetch BITS bits from a position in the instruction specified by CODE.
217
   CODE is a "place to put an argument", or 'x' for a destination
218
   that is a general address (mode and register).
219
   BUFFER contains the instruction.
220
   Returns -1 on failure.  */
221
 
222
static int
223
fetch_arg (unsigned char *buffer,
224
           int code,
225
           int bits,
226
           disassemble_info *info)
227
{
228
  int val = 0;
229
 
230
  switch (code)
231
    {
232
    case '/': /* MAC/EMAC mask bit.  */
233
      val = buffer[3] >> 5;
234
      break;
235
 
236
    case 'G': /* EMAC ACC load.  */
237
      val = ((buffer[3] >> 3) & 0x2) | ((~buffer[1] >> 7) & 0x1);
238
      break;
239
 
240
    case 'H': /* EMAC ACC !load.  */
241
      val = ((buffer[3] >> 3) & 0x2) | ((buffer[1] >> 7) & 0x1);
242
      break;
243
 
244
    case ']': /* EMAC ACCEXT bit.  */
245
      val = buffer[0] >> 2;
246
      break;
247
 
248
    case 'I': /* MAC/EMAC scale factor.  */
249
      val = buffer[2] >> 1;
250
      break;
251
 
252
    case 'F': /* EMAC ACCx.  */
253
      val = buffer[0] >> 1;
254
      break;
255
 
256
    case 'f':
257
      val = buffer[1];
258
      break;
259
 
260
    case 's':
261
      val = buffer[1];
262
      break;
263
 
264
    case 'd':                   /* Destination, for register or quick.  */
265
      val = (buffer[0] << 8) + buffer[1];
266
      val >>= 9;
267
      break;
268
 
269
    case 'x':                   /* Destination, for general arg.  */
270
      val = (buffer[0] << 8) + buffer[1];
271
      val >>= 6;
272
      break;
273
 
274
    case 'k':
275
      if (! FETCH_DATA (info, buffer + 3))
276
        return -1;
277
      val = (buffer[3] >> 4);
278
      break;
279
 
280
    case 'C':
281
      if (! FETCH_DATA (info, buffer + 3))
282
        return -1;
283
      val = buffer[3];
284
      break;
285
 
286
    case '1':
287
      if (! FETCH_DATA (info, buffer + 3))
288
        return -1;
289
      val = (buffer[2] << 8) + buffer[3];
290
      val >>= 12;
291
      break;
292
 
293
    case '2':
294
      if (! FETCH_DATA (info, buffer + 3))
295
        return -1;
296
      val = (buffer[2] << 8) + buffer[3];
297
      val >>= 6;
298
      break;
299
 
300
    case '3':
301
    case 'j':
302
      if (! FETCH_DATA (info, buffer + 3))
303
        return -1;
304
      val = (buffer[2] << 8) + buffer[3];
305
      break;
306
 
307
    case '4':
308
      if (! FETCH_DATA (info, buffer + 5))
309
        return -1;
310
      val = (buffer[4] << 8) + buffer[5];
311
      val >>= 12;
312
      break;
313
 
314
    case '5':
315
      if (! FETCH_DATA (info, buffer + 5))
316
        return -1;
317
      val = (buffer[4] << 8) + buffer[5];
318
      val >>= 6;
319
      break;
320
 
321
    case '6':
322
      if (! FETCH_DATA (info, buffer + 5))
323
        return -1;
324
      val = (buffer[4] << 8) + buffer[5];
325
      break;
326
 
327
    case '7':
328
      if (! FETCH_DATA (info, buffer + 3))
329
        return -1;
330
      val = (buffer[2] << 8) + buffer[3];
331
      val >>= 7;
332
      break;
333
 
334
    case '8':
335
      if (! FETCH_DATA (info, buffer + 3))
336
        return -1;
337
      val = (buffer[2] << 8) + buffer[3];
338
      val >>= 10;
339
      break;
340
 
341
    case '9':
342
      if (! FETCH_DATA (info, buffer + 3))
343
        return -1;
344
      val = (buffer[2] << 8) + buffer[3];
345
      val >>= 5;
346
      break;
347
 
348
    case 'e':
349
      val = (buffer[1] >> 6);
350
      break;
351
 
352
    case 'E':
353
      if (! FETCH_DATA (info, buffer + 3))
354
        return -1;
355
      val = (buffer[2] >> 1);
356
      break;
357
 
358
    case 'm':
359
      val = (buffer[1] & 0x40 ? 0x8 : 0)
360
        | ((buffer[0] >> 1) & 0x7)
361
        | (buffer[3] & 0x80 ? 0x10 : 0);
362
      break;
363
 
364
    case 'n':
365
      val = (buffer[1] & 0x40 ? 0x8 : 0) | ((buffer[0] >> 1) & 0x7);
366
      break;
367
 
368
    case 'o':
369
      val = (buffer[2] >> 4) | (buffer[3] & 0x80 ? 0x10 : 0);
370
      break;
371
 
372
    case 'M':
373
      val = (buffer[1] & 0xf) | (buffer[3] & 0x40 ? 0x10 : 0);
374
      break;
375
 
376
    case 'N':
377
      val = (buffer[3] & 0xf) | (buffer[3] & 0x40 ? 0x10 : 0);
378
      break;
379
 
380
    case 'h':
381
      val = buffer[2] >> 2;
382
      break;
383
 
384
    default:
385
      abort ();
386
    }
387
 
388
  /* bits is never too big.  */
389
  return val & ((1 << bits) - 1);
390
}
391
 
392
/* Check if an EA is valid for a particular code.  This is required
393
   for the EMAC instructions since the type of source address determines
394
   if it is a EMAC-load instruciton if the EA is mode 2-5, otherwise it
395
   is a non-load EMAC instruction and the bits mean register Ry.
396
   A similar case exists for the movem instructions where the register
397
   mask is interpreted differently for different EAs.  */
398
 
399
static bfd_boolean
400
m68k_valid_ea (char code, int val)
401
{
402
  int mode, mask;
403
#define M(n0,n1,n2,n3,n4,n5,n6,n70,n71,n72,n73,n74) \
404
  (n0 | n1 << 1 | n2 << 2 | n3 << 3 | n4 << 4 | n5 << 5 | n6 << 6 \
405
   | n70 << 7 | n71 << 8 | n72 << 9 | n73 << 10 | n74 << 11)
406
 
407
  switch (code)
408
    {
409
    case '*':
410
      mask = M (1,1,1,1,1,1,1,1,1,1,1,1);
411
      break;
412
    case '~':
413
      mask = M (0,0,1,1,1,1,1,1,1,0,0,0);
414
      break;
415
    case '%':
416
      mask = M (1,1,1,1,1,1,1,1,1,0,0,0);
417
      break;
418
    case ';':
419
      mask = M (1,0,1,1,1,1,1,1,1,1,1,1);
420
      break;
421
    case '@':
422
      mask = M (1,0,1,1,1,1,1,1,1,1,1,0);
423
      break;
424
    case '!':
425
      mask = M (0,0,1,0,0,1,1,1,1,1,1,0);
426
      break;
427
    case '&':
428
      mask = M (0,0,1,0,0,1,1,1,1,0,0,0);
429
      break;
430
    case '$':
431
      mask = M (1,0,1,1,1,1,1,1,1,0,0,0);
432
      break;
433
    case '?':
434
      mask = M (1,0,1,0,0,1,1,1,1,0,0,0);
435
      break;
436
    case '/':
437
      mask = M (1,0,1,0,0,1,1,1,1,1,1,0);
438
      break;
439
    case '|':
440
      mask = M (0,0,1,0,0,1,1,1,1,1,1,0);
441
      break;
442
    case '>':
443
      mask = M (0,0,1,0,1,1,1,1,1,0,0,0);
444
      break;
445
    case '<':
446
      mask = M (0,0,1,1,0,1,1,1,1,1,1,0);
447
      break;
448
    case 'm':
449
      mask = M (1,1,1,1,1,0,0,0,0,0,0,0);
450
      break;
451
    case 'n':
452
      mask = M (0,0,0,0,0,1,0,0,0,1,0,0);
453
      break;
454
    case 'o':
455
      mask = M (0,0,0,0,0,0,1,1,1,0,1,1);
456
      break;
457
    case 'p':
458
      mask = M (1,1,1,1,1,1,0,0,0,0,0,0);
459
      break;
460
    case 'q':
461
      mask = M (1,0,1,1,1,1,0,0,0,0,0,0);
462
      break;
463
    case 'v':
464
      mask = M (1,0,1,1,1,1,0,1,1,0,0,0);
465
      break;
466
    case 'b':
467
      mask = M (1,0,1,1,1,1,0,0,0,1,0,0);
468
      break;
469
    case 'w':
470
      mask = M (0,0,1,1,1,1,0,0,0,1,0,0);
471
      break;
472
    case 'y':
473
      mask = M (0,0,1,0,0,1,0,0,0,0,0,0);
474
      break;
475
    case 'z':
476
      mask = M (0,0,1,0,0,1,0,0,0,1,0,0);
477
      break;
478
    case '4':
479
      mask = M (0,0,1,1,1,1,0,0,0,0,0,0);
480
      break;
481
    default:
482
      abort ();
483
    }
484
#undef M
485
 
486
  mode = (val >> 3) & 7;
487
  if (mode == 7)
488
    mode += val & 7;
489
  return (mask & (1 << mode)) != 0;
490
}
491
 
492
/* Print a base register REGNO and displacement DISP, on INFO->STREAM.
493
   REGNO = -1 for pc, -2 for none (suppressed).  */
494
 
495
static void
496
print_base (int regno, bfd_vma disp, disassemble_info *info)
497
{
498
  if (regno == -1)
499
    {
500
      (*info->fprintf_func) (info->stream, "%%pc@(");
501
      (*info->print_address_func) (disp, info);
502
    }
503
  else
504
    {
505
      char buf[50];
506
 
507
      if (regno == -2)
508
        (*info->fprintf_func) (info->stream, "@(");
509
      else if (regno == -3)
510
        (*info->fprintf_func) (info->stream, "%%zpc@(");
511
      else
512
        (*info->fprintf_func) (info->stream, "%s@(", reg_names[regno]);
513
 
514
      sprintf_vma (buf, disp);
515
      (*info->fprintf_func) (info->stream, "%s", buf);
516
    }
517
}
518
 
519
/* Print an indexed argument.  The base register is BASEREG (-1 for pc).
520
   P points to extension word, in buffer.
521
   ADDR is the nominal core address of that extension word.
522
   Returns NULL upon error.  */
523
 
524
static unsigned char *
525
print_indexed (int basereg,
526
               unsigned char *p,
527
               bfd_vma addr,
528
               disassemble_info *info)
529
{
530
  int word;
531
  static char *const scales[] = { "", ":2", ":4", ":8" };
532
  bfd_vma base_disp;
533
  bfd_vma outer_disp;
534
  char buf[40];
535
  char vmabuf[50];
536
 
537
  NEXTWORD (p, word, NULL);
538
 
539
  /* Generate the text for the index register.
540
     Where this will be output is not yet determined.  */
541
  sprintf (buf, "%s:%c%s",
542
           reg_names[(word >> 12) & 0xf],
543
           (word & 0x800) ? 'l' : 'w',
544
           scales[(word >> 9) & 3]);
545
 
546
  /* Handle the 68000 style of indexing.  */
547
 
548
  if ((word & 0x100) == 0)
549
    {
550
      base_disp = word & 0xff;
551
      if ((base_disp & 0x80) != 0)
552
        base_disp -= 0x100;
553
      if (basereg == -1)
554
        base_disp += addr;
555
      print_base (basereg, base_disp, info);
556
      (*info->fprintf_func) (info->stream, ",%s)", buf);
557
      return p;
558
    }
559
 
560
  /* Handle the generalized kind.  */
561
  /* First, compute the displacement to add to the base register.  */
562
  if (word & 0200)
563
    {
564
      if (basereg == -1)
565
        basereg = -3;
566
      else
567
        basereg = -2;
568
    }
569
  if (word & 0100)
570
    buf[0] = '\0';
571
  base_disp = 0;
572
  switch ((word >> 4) & 3)
573
    {
574
    case 2:
575
      NEXTWORD (p, base_disp, NULL);
576
      break;
577
    case 3:
578
      NEXTLONG (p, base_disp, NULL);
579
    }
580
  if (basereg == -1)
581
    base_disp += addr;
582
 
583
  /* Handle single-level case (not indirect).  */
584
  if ((word & 7) == 0)
585
    {
586
      print_base (basereg, base_disp, info);
587
      if (buf[0] != '\0')
588
        (*info->fprintf_func) (info->stream, ",%s", buf);
589
      (*info->fprintf_func) (info->stream, ")");
590
      return p;
591
    }
592
 
593
  /* Two level.  Compute displacement to add after indirection.  */
594
  outer_disp = 0;
595
  switch (word & 3)
596
    {
597
    case 2:
598
      NEXTWORD (p, outer_disp, NULL);
599
      break;
600
    case 3:
601
      NEXTLONG (p, outer_disp, NULL);
602
    }
603
 
604
  print_base (basereg, base_disp, info);
605
  if ((word & 4) == 0 && buf[0] != '\0')
606
    {
607
      (*info->fprintf_func) (info->stream, ",%s", buf);
608
      buf[0] = '\0';
609
    }
610
  sprintf_vma (vmabuf, outer_disp);
611
  (*info->fprintf_func) (info->stream, ")@(%s", vmabuf);
612
  if (buf[0] != '\0')
613
    (*info->fprintf_func) (info->stream, ",%s", buf);
614
  (*info->fprintf_func) (info->stream, ")");
615
 
616
  return p;
617
}
618
 
619
#define FETCH_ARG(size, val)                            \
620
  do                                                    \
621
    {                                                   \
622
      val = fetch_arg (buffer, place, size, info);      \
623
      if (val < 0)                                       \
624
        return -3;                                      \
625
    }                                                   \
626
  while (0)
627
 
628
/* Returns number of bytes "eaten" by the operand, or
629
   return -1 if an invalid operand was found, or -2 if
630
   an opcode tabe error was found or -3 to simply abort.
631
   ADDR is the pc for this arg to be relative to.  */
632
 
633
static int
634
print_insn_arg (const char *d,
635
                unsigned char *buffer,
636
                unsigned char *p0,
637
                bfd_vma addr,
638
                disassemble_info *info)
639
{
640
  int val = 0;
641
  int place = d[1];
642
  unsigned char *p = p0;
643
  int regno;
644
  const char *regname;
645
  unsigned char *p1;
646
  double flval;
647
  int flt_p;
648
  bfd_signed_vma disp;
649
  unsigned int uval;
650
 
651
  switch (*d)
652
    {
653
    case 'c':           /* Cache identifier.  */
654
      {
655
        static char *const cacheFieldName[] = { "nc", "dc", "ic", "bc" };
656
        FETCH_ARG (2, val);
657
        (*info->fprintf_func) (info->stream, cacheFieldName[val]);
658
        break;
659
      }
660
 
661
    case 'a':           /* Address register indirect only. Cf. case '+'.  */
662
      {
663
        FETCH_ARG (3, val);
664
        (*info->fprintf_func) (info->stream, "%s@", reg_names[val + 8]);
665
        break;
666
      }
667
 
668
    case '_':           /* 32-bit absolute address for move16.  */
669
      {
670
        NEXTULONG (p, uval);
671
        (*info->print_address_func) (uval, info);
672
        break;
673
      }
674
 
675
    case 'C':
676
      (*info->fprintf_func) (info->stream, "%%ccr");
677
      break;
678
 
679
    case 'S':
680
      (*info->fprintf_func) (info->stream, "%%sr");
681
      break;
682
 
683
    case 'U':
684
      (*info->fprintf_func) (info->stream, "%%usp");
685
      break;
686
 
687
    case 'E':
688
      (*info->fprintf_func) (info->stream, "%%acc");
689
      break;
690
 
691
    case 'G':
692
      (*info->fprintf_func) (info->stream, "%%macsr");
693
      break;
694
 
695
    case 'H':
696
      (*info->fprintf_func) (info->stream, "%%mask");
697
      break;
698
 
699
    case 'J':
700
      {
701
        /* FIXME: There's a problem here, different m68k processors call the
702
           same address different names.  The tables below try to get it right
703
           using info->mach, but only for v4e.  */
704
        struct regname { char * name; int value; };
705
        static const struct regname names[] =
706
          {
707
            {"%sfc", 0x000}, {"%dfc", 0x001}, {"%cacr", 0x002},
708
            {"%tc",  0x003}, {"%itt0",0x004}, {"%itt1", 0x005},
709
            {"%dtt0",0x006}, {"%dtt1",0x007}, {"%buscr",0x008},
710
            {"%rgpiobar", 0x009}, {"%acr4",0x00c},
711
            {"%acr5",0x00d}, {"%acr6",0x00e}, {"%acr7", 0x00f},
712
            {"%usp", 0x800}, {"%vbr", 0x801}, {"%caar", 0x802},
713
            {"%msp", 0x803}, {"%isp", 0x804},
714
            {"%pc", 0x80f},
715
            /* Reg c04 is sometimes called flashbar or rambar.
716
               Reg c05 is also sometimes called rambar.  */
717
            {"%rambar0", 0xc04}, {"%rambar1", 0xc05},
718
 
719
            /* reg c0e is sometimes called mbar2 or secmbar.
720
               reg c0f is sometimes called mbar.  */
721
            {"%mbar0", 0xc0e}, {"%mbar1", 0xc0f},
722
 
723
            /* Should we be calling this psr like we do in case 'Y'?  */
724
            {"%mmusr",0x805},
725
 
726
            {"%urp", 0x806}, {"%srp", 0x807}, {"%pcr", 0x808},
727
 
728
            /* Fido added these.  */
729
            {"%cac", 0xffe}, {"%mbo", 0xfff}
730
        };
731
        /* Alternate names for v4e (MCF5407/5445x/MCF547x/MCF548x), at least.  */
732
        static const struct regname names_v4e[] =
733
          {
734
            {"%asid",0x003}, {"%acr0",0x004}, {"%acr1",0x005},
735
            {"%acr2",0x006}, {"%acr3",0x007}, {"%mmubar",0x008},
736
          };
737
        unsigned int arch_mask;
738
 
739
        arch_mask = bfd_m68k_mach_to_features (info->mach);
740
        FETCH_ARG (12, val);
741
        if (arch_mask & (mcfisa_b | mcfisa_c))
742
          {
743
            for (regno = ARRAY_SIZE (names_v4e); --regno >= 0;)
744
              if (names_v4e[regno].value == val)
745
                {
746
                  (*info->fprintf_func) (info->stream, "%s", names_v4e[regno].name);
747
                  break;
748
                }
749
            if (regno >= 0)
750
              break;
751
          }
752
        for (regno = ARRAY_SIZE (names) - 1; regno >= 0; regno--)
753
          if (names[regno].value == val)
754
            {
755
              (*info->fprintf_func) (info->stream, "%s", names[regno].name);
756
              break;
757
            }
758
        if (regno < 0)
759
          (*info->fprintf_func) (info->stream, "0x%x", val);
760
      }
761
      break;
762
 
763
    case 'Q':
764
      FETCH_ARG (3, val);
765
      /* 0 means 8, except for the bkpt instruction... */
766
      if (val == 0 && d[1] != 's')
767
        val = 8;
768
      (*info->fprintf_func) (info->stream, "#%d", val);
769
      break;
770
 
771
    case 'x':
772
      FETCH_ARG (3, val);
773
      /* 0 means -1.  */
774
      if (val == 0)
775
        val = -1;
776
      (*info->fprintf_func) (info->stream, "#%d", val);
777
      break;
778
 
779
    case 'j':
780
      FETCH_ARG (3, val);
781
      (*info->fprintf_func) (info->stream, "#%d", val+1);
782
      break;
783
 
784
    case 'K':
785
      FETCH_ARG (9, val);
786
      (*info->fprintf_func) (info->stream, "#%d", val);
787
      break;
788
 
789
    case 'M':
790
      if (place == 'h')
791
        {
792
          static char *const scalefactor_name[] = { "<<", ">>" };
793
 
794
          FETCH_ARG (1, val);
795
          (*info->fprintf_func) (info->stream, scalefactor_name[val]);
796
        }
797
      else
798
        {
799
          FETCH_ARG (8, val);
800
          if (val & 0x80)
801
            val = val - 0x100;
802
          (*info->fprintf_func) (info->stream, "#%d", val);
803
        }
804
      break;
805
 
806
    case 'T':
807
      FETCH_ARG (4, val);
808
      (*info->fprintf_func) (info->stream, "#%d", val);
809
      break;
810
 
811
    case 'D':
812
      FETCH_ARG (3, val);
813
      (*info->fprintf_func) (info->stream, "%s", reg_names[val]);
814
      break;
815
 
816
    case 'A':
817
      FETCH_ARG (3, val);
818
      (*info->fprintf_func) (info->stream, "%s", reg_names[val + 010]);
819
      break;
820
 
821
    case 'R':
822
      FETCH_ARG (4, val);
823
      (*info->fprintf_func) (info->stream, "%s", reg_names[val]);
824
      break;
825
 
826
    case 'r':
827
      FETCH_ARG (4, regno);
828
      if (regno > 7)
829
        (*info->fprintf_func) (info->stream, "%s@", reg_names[regno]);
830
      else
831
        (*info->fprintf_func) (info->stream, "@(%s)", reg_names[regno]);
832
      break;
833
 
834
    case 'F':
835
      FETCH_ARG (3, val);
836
      (*info->fprintf_func) (info->stream, "%%fp%d", val);
837
      break;
838
 
839
    case 'O':
840
      FETCH_ARG (6, val);
841
      if (val & 0x20)
842
        (*info->fprintf_func) (info->stream, "%s", reg_names[val & 7]);
843
      else
844
        (*info->fprintf_func) (info->stream, "%d", val);
845
      break;
846
 
847
    case '+':
848
      FETCH_ARG (3, val);
849
      (*info->fprintf_func) (info->stream, "%s@+", reg_names[val + 8]);
850
      break;
851
 
852
    case '-':
853
      FETCH_ARG (3, val);
854
      (*info->fprintf_func) (info->stream, "%s@-", reg_names[val + 8]);
855
      break;
856
 
857
    case 'k':
858
      if (place == 'k')
859
        {
860
          FETCH_ARG (3, val);
861
          (*info->fprintf_func) (info->stream, "{%s}", reg_names[val]);
862
        }
863
      else if (place == 'C')
864
        {
865
          FETCH_ARG (7, val);
866
          if (val > 63)         /* This is a signed constant.  */
867
            val -= 128;
868
          (*info->fprintf_func) (info->stream, "{#%d}", val);
869
        }
870
      else
871
        return -1;
872
      break;
873
 
874
    case '#':
875
    case '^':
876
      p1 = buffer + (*d == '#' ? 2 : 4);
877
      if (place == 's')
878
        FETCH_ARG (4, val);
879
      else if (place == 'C')
880
        FETCH_ARG (7, val);
881
      else if (place == '8')
882
        FETCH_ARG (3, val);
883
      else if (place == '3')
884
        FETCH_ARG (8, val);
885
      else if (place == 'b')
886
        NEXTBYTE (p1, val);
887
      else if (place == 'w' || place == 'W')
888
        NEXTWORD (p1, val, -3);
889
      else if (place == 'l')
890
        NEXTLONG (p1, val, -3);
891
      else
892
        return -2;
893
 
894
      (*info->fprintf_func) (info->stream, "#%d", val);
895
      break;
896
 
897
    case 'B':
898
      if (place == 'b')
899
        NEXTBYTE (p, disp);
900
      else if (place == 'B')
901
        disp = COERCE_SIGNED_CHAR (buffer[1]);
902
      else if (place == 'w' || place == 'W')
903
        NEXTWORD (p, disp, -3);
904
      else if (place == 'l' || place == 'L' || place == 'C')
905
        NEXTLONG (p, disp, -3);
906
      else if (place == 'g')
907
        {
908
          NEXTBYTE (buffer, disp);
909
          if (disp == 0)
910
            NEXTWORD (p, disp, -3);
911
          else if (disp == -1)
912
            NEXTLONG (p, disp, -3);
913
        }
914
      else if (place == 'c')
915
        {
916
          if (buffer[1] & 0x40)         /* If bit six is one, long offset.  */
917
            NEXTLONG (p, disp, -3);
918
          else
919
            NEXTWORD (p, disp, -3);
920
        }
921
      else
922
        return -2;
923
 
924
      (*info->print_address_func) (addr + disp, info);
925
      break;
926
 
927
    case 'd':
928
      {
929
        int val1;
930
 
931
        NEXTWORD (p, val, -3);
932
        FETCH_ARG (3, val1);
933
        (*info->fprintf_func) (info->stream, "%s@(%d)", reg_names[val1 + 8], val);
934
        break;
935
      }
936
 
937
    case 's':
938
      FETCH_ARG (3, val);
939
      (*info->fprintf_func) (info->stream, "%s", fpcr_names[val]);
940
      break;
941
 
942
    case 'e':
943
      FETCH_ARG (2, val);
944
      (*info->fprintf_func) (info->stream, "%%acc%d", val);
945
      break;
946
 
947
    case 'g':
948
      FETCH_ARG (1, val);
949
      (*info->fprintf_func) (info->stream, "%%accext%s", val == 0 ? "01" : "23");
950
      break;
951
 
952
    case 'i':
953
      FETCH_ARG (2, val);
954
      if (val == 1)
955
        (*info->fprintf_func) (info->stream, "<<");
956
      else if (val == 3)
957
        (*info->fprintf_func) (info->stream, ">>");
958
      else
959
        return -1;
960
      break;
961
 
962
    case 'I':
963
      /* Get coprocessor ID... */
964
      val = fetch_arg (buffer, 'd', 3, info);
965
      if (val < 0)
966
        return -3;
967
      if (val != 1)                             /* Unusual coprocessor ID?  */
968
        (*info->fprintf_func) (info->stream, "(cpid=%d) ", val);
969
      break;
970
 
971
    case '4':
972
    case '*':
973
    case '~':
974
    case '%':
975
    case ';':
976
    case '@':
977
    case '!':
978
    case '$':
979
    case '?':
980
    case '/':
981
    case '&':
982
    case '|':
983
    case '<':
984
    case '>':
985
    case 'm':
986
    case 'n':
987
    case 'o':
988
    case 'p':
989
    case 'q':
990
    case 'v':
991
    case 'b':
992
    case 'w':
993
    case 'y':
994
    case 'z':
995
      if (place == 'd')
996
        {
997
          val = fetch_arg (buffer, 'x', 6, info);
998
          if (val < 0)
999
            return -3;
1000
          val = ((val & 7) << 3) + ((val >> 3) & 7);
1001
        }
1002
      else
1003
        {
1004
          val = fetch_arg (buffer, 's', 6, info);
1005
          if (val < 0)
1006
            return -3;
1007
        }
1008
 
1009
      /* If the <ea> is invalid for *d, then reject this match.  */
1010
      if (!m68k_valid_ea (*d, val))
1011
        return -1;
1012
 
1013
      /* Get register number assuming address register.  */
1014
      regno = (val & 7) + 8;
1015
      regname = reg_names[regno];
1016
      switch (val >> 3)
1017
        {
1018
        case 0:
1019
          (*info->fprintf_func) (info->stream, "%s", reg_names[val]);
1020
          break;
1021
 
1022
        case 1:
1023
          (*info->fprintf_func) (info->stream, "%s", regname);
1024
          break;
1025
 
1026
        case 2:
1027
          (*info->fprintf_func) (info->stream, "%s@", regname);
1028
          break;
1029
 
1030
        case 3:
1031
          (*info->fprintf_func) (info->stream, "%s@+", regname);
1032
          break;
1033
 
1034
        case 4:
1035
          (*info->fprintf_func) (info->stream, "%s@-", regname);
1036
          break;
1037
 
1038
        case 5:
1039
          NEXTWORD (p, val, -3);
1040
          (*info->fprintf_func) (info->stream, "%s@(%d)", regname, val);
1041
          break;
1042
 
1043
        case 6:
1044
          p = print_indexed (regno, p, addr, info);
1045
          if (p == NULL)
1046
            return -3;
1047
          break;
1048
 
1049
        case 7:
1050
          switch (val & 7)
1051
            {
1052
            case 0:
1053
              NEXTWORD (p, val, -3);
1054
              (*info->print_address_func) (val, info);
1055
              break;
1056
 
1057
            case 1:
1058
              NEXTULONG (p, uval);
1059
              (*info->print_address_func) (uval, info);
1060
              break;
1061
 
1062
            case 2:
1063
              NEXTWORD (p, val, -3);
1064
              (*info->fprintf_func) (info->stream, "%%pc@(");
1065
              (*info->print_address_func) (addr + val, info);
1066
              (*info->fprintf_func) (info->stream, ")");
1067
              break;
1068
 
1069
            case 3:
1070
              p = print_indexed (-1, p, addr, info);
1071
              if (p == NULL)
1072
                return -3;
1073
              break;
1074
 
1075
            case 4:
1076
              flt_p = 1;        /* Assume it's a float... */
1077
              switch (place)
1078
              {
1079
                case 'b':
1080
                  NEXTBYTE (p, val);
1081
                  flt_p = 0;
1082
                  break;
1083
 
1084
                case 'w':
1085
                  NEXTWORD (p, val, -3);
1086
                  flt_p = 0;
1087
                  break;
1088
 
1089
                case 'l':
1090
                  NEXTLONG (p, val, -3);
1091
                  flt_p = 0;
1092
                  break;
1093
 
1094
                case 'f':
1095
                  NEXTSINGLE (flval, p);
1096
                  break;
1097
 
1098
                case 'F':
1099
                  NEXTDOUBLE (flval, p);
1100
                  break;
1101
 
1102
                case 'x':
1103
                  NEXTEXTEND (flval, p);
1104
                  break;
1105
 
1106
                case 'p':
1107
                  NEXTPACKED (p, flval);
1108
                  break;
1109
 
1110
                default:
1111
                  return -1;
1112
              }
1113
              if (flt_p)        /* Print a float? */
1114
                (*info->fprintf_func) (info->stream, "#0e%g", flval);
1115
              else
1116
                (*info->fprintf_func) (info->stream, "#%d", val);
1117
              break;
1118
 
1119
            default:
1120
              return -1;
1121
            }
1122
        }
1123
 
1124
      /* If place is '/', then this is the case of the mask bit for
1125
         mac/emac loads. Now that the arg has been printed, grab the
1126
         mask bit and if set, add a '&' to the arg.  */
1127
      if (place == '/')
1128
        {
1129
          FETCH_ARG (1, val);
1130
          if (val)
1131
            info->fprintf_func (info->stream, "&");
1132
        }
1133
      break;
1134
 
1135
    case 'L':
1136
    case 'l':
1137
        if (place == 'w')
1138
          {
1139
            char doneany;
1140
            p1 = buffer + 2;
1141
            NEXTWORD (p1, val, -3);
1142
            /* Move the pointer ahead if this point is farther ahead
1143
               than the last.  */
1144
            p = p1 > p ? p1 : p;
1145
            if (val == 0)
1146
              {
1147
                (*info->fprintf_func) (info->stream, "#0");
1148
                break;
1149
              }
1150
            if (*d == 'l')
1151
              {
1152
                int newval = 0;
1153
 
1154
                for (regno = 0; regno < 16; ++regno)
1155
                  if (val & (0x8000 >> regno))
1156
                    newval |= 1 << regno;
1157
                val = newval;
1158
              }
1159
            val &= 0xffff;
1160
            doneany = 0;
1161
            for (regno = 0; regno < 16; ++regno)
1162
              if (val & (1 << regno))
1163
                {
1164
                  int first_regno;
1165
 
1166
                  if (doneany)
1167
                    (*info->fprintf_func) (info->stream, "/");
1168
                  doneany = 1;
1169
                  (*info->fprintf_func) (info->stream, "%s", reg_names[regno]);
1170
                  first_regno = regno;
1171
                  while (val & (1 << (regno + 1)))
1172
                    ++regno;
1173
                  if (regno > first_regno)
1174
                    (*info->fprintf_func) (info->stream, "-%s",
1175
                                           reg_names[regno]);
1176
                }
1177
          }
1178
        else if (place == '3')
1179
          {
1180
            /* `fmovem' insn.  */
1181
            char doneany;
1182
 
1183
            FETCH_ARG (8, val);
1184
            if (val == 0)
1185
              {
1186
                (*info->fprintf_func) (info->stream, "#0");
1187
                break;
1188
              }
1189
            if (*d == 'l')
1190
              {
1191
                int newval = 0;
1192
 
1193
                for (regno = 0; regno < 8; ++regno)
1194
                  if (val & (0x80 >> regno))
1195
                    newval |= 1 << regno;
1196
                val = newval;
1197
              }
1198
            val &= 0xff;
1199
            doneany = 0;
1200
            for (regno = 0; regno < 8; ++regno)
1201
              if (val & (1 << regno))
1202
                {
1203
                  int first_regno;
1204
                  if (doneany)
1205
                    (*info->fprintf_func) (info->stream, "/");
1206
                  doneany = 1;
1207
                  (*info->fprintf_func) (info->stream, "%%fp%d", regno);
1208
                  first_regno = regno;
1209
                  while (val & (1 << (regno + 1)))
1210
                    ++regno;
1211
                  if (regno > first_regno)
1212
                    (*info->fprintf_func) (info->stream, "-%%fp%d", regno);
1213
                }
1214
          }
1215
        else if (place == '8')
1216
          {
1217
            FETCH_ARG (3, val);
1218
            /* fmoveml for FP status registers.  */
1219
            (*info->fprintf_func) (info->stream, "%s", fpcr_names[val]);
1220
          }
1221
        else
1222
          return -2;
1223
      break;
1224
 
1225
    case 'X':
1226
      place = '8';
1227
    case 'Y':
1228
    case 'Z':
1229
    case 'W':
1230
    case '0':
1231
    case '1':
1232
    case '2':
1233
    case '3':
1234
      {
1235
        char *name = 0;
1236
 
1237
        FETCH_ARG (5, val);
1238
        switch (val)
1239
          {
1240
          case 2: name = "%tt0"; break;
1241
          case 3: name = "%tt1"; break;
1242
          case 0x10: name = "%tc"; break;
1243
          case 0x11: name = "%drp"; break;
1244
          case 0x12: name = "%srp"; break;
1245
          case 0x13: name = "%crp"; break;
1246
          case 0x14: name = "%cal"; break;
1247
          case 0x15: name = "%val"; break;
1248
          case 0x16: name = "%scc"; break;
1249
          case 0x17: name = "%ac"; break;
1250
          case 0x18: name = "%psr"; break;
1251
          case 0x19: name = "%pcsr"; break;
1252
          case 0x1c:
1253
          case 0x1d:
1254
            {
1255
              int break_reg = ((buffer[3] >> 2) & 7);
1256
 
1257
              (*info->fprintf_func)
1258
                (info->stream, val == 0x1c ? "%%bad%d" : "%%bac%d",
1259
                 break_reg);
1260
            }
1261
            break;
1262
          default:
1263
            (*info->fprintf_func) (info->stream, "<mmu register %d>", val);
1264
          }
1265
        if (name)
1266
          (*info->fprintf_func) (info->stream, "%s", name);
1267
      }
1268
      break;
1269
 
1270
    case 'f':
1271
      {
1272
        int fc;
1273
 
1274
        FETCH_ARG (5, fc);
1275
        if (fc == 1)
1276
          (*info->fprintf_func) (info->stream, "%%dfc");
1277
        else if (fc == 0)
1278
          (*info->fprintf_func) (info->stream, "%%sfc");
1279
        else
1280
          /* xgettext:c-format */
1281
          (*info->fprintf_func) (info->stream, _("<function code %d>"), fc);
1282
      }
1283
      break;
1284
 
1285
    case 'V':
1286
      (*info->fprintf_func) (info->stream, "%%val");
1287
      break;
1288
 
1289
    case 't':
1290
      {
1291
        int level;
1292
 
1293
        FETCH_ARG (3, level);
1294
        (*info->fprintf_func) (info->stream, "%d", level);
1295
      }
1296
      break;
1297
 
1298
    case 'u':
1299
      {
1300
        short is_upper = 0;
1301
        int reg;
1302
 
1303
        FETCH_ARG (5, reg);
1304
        if (reg & 0x10)
1305
          {
1306
            is_upper = 1;
1307
            reg &= 0xf;
1308
          }
1309
        (*info->fprintf_func) (info->stream, "%s%s",
1310
                               reg_half_names[reg],
1311
                               is_upper ? "u" : "l");
1312
      }
1313
      break;
1314
 
1315
    default:
1316
      return -2;
1317
    }
1318
 
1319
  return p - p0;
1320
}
1321
 
1322
/* Try to match the current instruction to best and if so, return the
1323
   number of bytes consumed from the instruction stream, else zero.  */
1324
 
1325
static int
1326
match_insn_m68k (bfd_vma memaddr,
1327
                 disassemble_info * info,
1328
                 const struct m68k_opcode * best)
1329
{
1330
  unsigned char *save_p;
1331
  unsigned char *p;
1332
  const char *d;
1333
  const char *args = best->args;
1334
 
1335
  struct private *priv = (struct private *) info->private_data;
1336
  bfd_byte *buffer = priv->the_buffer;
1337
  fprintf_ftype save_printer = info->fprintf_func;
1338
  void (* save_print_address) (bfd_vma, struct disassemble_info *)
1339
    = info->print_address_func;
1340
 
1341
  if (*args == '.')
1342
    args++;
1343
 
1344
  /* Point at first word of argument data,
1345
     and at descriptor for first argument.  */
1346
  p = buffer + 2;
1347
 
1348
  /* Figure out how long the fixed-size portion of the instruction is.
1349
     The only place this is stored in the opcode table is
1350
     in the arguments--look for arguments which specify fields in the 2nd
1351
     or 3rd words of the instruction.  */
1352
  for (d = args; *d; d += 2)
1353
    {
1354
      /* I don't think it is necessary to be checking d[0] here;
1355
         I suspect all this could be moved to the case statement below.  */
1356
      if (d[0] == '#')
1357
        {
1358
          if (d[1] == 'l' && p - buffer < 6)
1359
            p = buffer + 6;
1360
          else if (p - buffer < 4 && d[1] != 'C' && d[1] != '8')
1361
            p = buffer + 4;
1362
        }
1363
 
1364
      if ((d[0] == 'L' || d[0] == 'l') && d[1] == 'w' && p - buffer < 4)
1365
        p = buffer + 4;
1366
 
1367
      switch (d[1])
1368
        {
1369
        case '1':
1370
        case '2':
1371
        case '3':
1372
        case '7':
1373
        case '8':
1374
        case '9':
1375
        case 'i':
1376
          if (p - buffer < 4)
1377
            p = buffer + 4;
1378
          break;
1379
        case '4':
1380
        case '5':
1381
        case '6':
1382
          if (p - buffer < 6)
1383
            p = buffer + 6;
1384
          break;
1385
        default:
1386
          break;
1387
        }
1388
    }
1389
 
1390
  /* pflusha is an exceptions.  It takes no arguments but is two words
1391
     long.  Recognize it by looking at the lower 16 bits of the mask.  */
1392
  if (p - buffer < 4 && (best->match & 0xFFFF) != 0)
1393
    p = buffer + 4;
1394
 
1395
  /* lpstop is another exception.  It takes a one word argument but is
1396
     three words long.  */
1397
  if (p - buffer < 6
1398
      && (best->match & 0xffff) == 0xffff
1399
      && args[0] == '#'
1400
      && args[1] == 'w')
1401
    {
1402
      /* Copy the one word argument into the usual location for a one
1403
         word argument, to simplify printing it.  We can get away with
1404
         this because we know exactly what the second word is, and we
1405
         aren't going to print anything based on it.  */
1406
      p = buffer + 6;
1407
      FETCH_DATA (info, p);
1408
      buffer[2] = buffer[4];
1409
      buffer[3] = buffer[5];
1410
    }
1411
 
1412
  FETCH_DATA (info, p);
1413
 
1414
  save_p = p;
1415
  info->print_address_func = dummy_print_address;
1416
  info->fprintf_func = (fprintf_ftype) dummy_printer;
1417
 
1418
  /* We scan the operands twice.  The first time we don't print anything,
1419
     but look for errors.  */
1420
  for (d = args; *d; d += 2)
1421
    {
1422
      int eaten = print_insn_arg (d, buffer, p, memaddr + (p - buffer), info);
1423
 
1424
      if (eaten >= 0)
1425
        p += eaten;
1426
      else if (eaten == -1 || eaten == -3)
1427
        {
1428
          info->fprintf_func = save_printer;
1429
          info->print_address_func = save_print_address;
1430
          return 0;
1431
        }
1432
      else
1433
        {
1434
          /* We must restore the print functions before trying to print the
1435
             error message.  */
1436
          info->fprintf_func = save_printer;
1437
          info->print_address_func = save_print_address;
1438
          info->fprintf_func (info->stream,
1439
                              /* xgettext:c-format */
1440
                              _("<internal error in opcode table: %s %s>\n"),
1441
                              best->name, best->args);
1442
          return 2;
1443
        }
1444
    }
1445
 
1446
  p = save_p;
1447
  info->fprintf_func = save_printer;
1448
  info->print_address_func = save_print_address;
1449
 
1450
  d = args;
1451
 
1452
  info->fprintf_func (info->stream, "%s", best->name);
1453
 
1454
  if (*d)
1455
    info->fprintf_func (info->stream, " ");
1456
 
1457
  while (*d)
1458
    {
1459
      p += print_insn_arg (d, buffer, p, memaddr + (p - buffer), info);
1460
      d += 2;
1461
 
1462
      if (*d && *(d - 2) != 'I' && *d != 'k')
1463
        info->fprintf_func (info->stream, ",");
1464
    }
1465
 
1466
  return p - buffer;
1467
}
1468
 
1469
/* Try to interpret the instruction at address MEMADDR as one that
1470
   can execute on a processor with the features given by ARCH_MASK.
1471
   If successful, print the instruction to INFO->STREAM and return
1472
   its length in bytes.  Return 0 otherwise.  */
1473
 
1474
static int
1475
m68k_scan_mask (bfd_vma memaddr, disassemble_info *info,
1476
                unsigned int arch_mask)
1477
{
1478
  int i;
1479
  const char *d;
1480
  static const struct m68k_opcode **opcodes[16];
1481
  static int numopcodes[16];
1482
  int val;
1483
  int major_opcode;
1484
 
1485
  struct private *priv = (struct private *) info->private_data;
1486
  bfd_byte *buffer = priv->the_buffer;
1487
 
1488
  if (!opcodes[0])
1489
    {
1490
      /* Speed up the matching by sorting the opcode
1491
         table on the upper four bits of the opcode.  */
1492
      const struct m68k_opcode **opc_pointer[16];
1493
 
1494
      /* First count how many opcodes are in each of the sixteen buckets.  */
1495
      for (i = 0; i < m68k_numopcodes; i++)
1496
        numopcodes[(m68k_opcodes[i].opcode >> 28) & 15]++;
1497
 
1498
      /* Then create a sorted table of pointers
1499
         that point into the unsorted table.  */
1500
      opc_pointer[0] = xmalloc (sizeof (struct m68k_opcode *)
1501
                                * m68k_numopcodes);
1502
      opcodes[0] = opc_pointer[0];
1503
 
1504
      for (i = 1; i < 16; i++)
1505
        {
1506
          opc_pointer[i] = opc_pointer[i - 1] + numopcodes[i - 1];
1507
          opcodes[i] = opc_pointer[i];
1508
        }
1509
 
1510
      for (i = 0; i < m68k_numopcodes; i++)
1511
        *opc_pointer[(m68k_opcodes[i].opcode >> 28) & 15]++ = &m68k_opcodes[i];
1512
    }
1513
 
1514
  FETCH_DATA (info, buffer + 2);
1515
  major_opcode = (buffer[0] >> 4) & 15;
1516
 
1517
  for (i = 0; i < numopcodes[major_opcode]; i++)
1518
    {
1519
      const struct m68k_opcode *opc = opcodes[major_opcode][i];
1520
      unsigned long opcode = opc->opcode;
1521
      unsigned long match = opc->match;
1522
      const char *args = opc->args;
1523
 
1524
      if (*args == '.')
1525
        args++;
1526
 
1527
      if (((0xff & buffer[0] & (match >> 24)) == (0xff & (opcode >> 24)))
1528
          && ((0xff & buffer[1] & (match >> 16)) == (0xff & (opcode >> 16)))
1529
          /* Only fetch the next two bytes if we need to.  */
1530
          && (((0xffff & match) == 0)
1531
              ||
1532
              (FETCH_DATA (info, buffer + 4)
1533
               && ((0xff & buffer[2] & (match >> 8)) == (0xff & (opcode >> 8)))
1534
               && ((0xff & buffer[3] & match) == (0xff & opcode)))
1535
              )
1536
          && (opc->arch & arch_mask) != 0)
1537
        {
1538
          /* Don't use for printout the variants of divul and divsl
1539
             that have the same register number in two places.
1540
             The more general variants will match instead.  */
1541
          for (d = args; *d; d += 2)
1542
            if (d[1] == 'D')
1543
              break;
1544
 
1545
          /* Don't use for printout the variants of most floating
1546
             point coprocessor instructions which use the same
1547
             register number in two places, as above.  */
1548
          if (*d == '\0')
1549
            for (d = args; *d; d += 2)
1550
              if (d[1] == 't')
1551
                break;
1552
 
1553
          /* Don't match fmovel with more than one register;
1554
             wait for fmoveml.  */
1555
          if (*d == '\0')
1556
            {
1557
              for (d = args; *d; d += 2)
1558
                {
1559
                  if (d[0] == 's' && d[1] == '8')
1560
                    {
1561
                      val = fetch_arg (buffer, d[1], 3, info);
1562
                      if (val < 0)
1563
                        return 0;
1564
                      if ((val & (val - 1)) != 0)
1565
                        break;
1566
                    }
1567
                }
1568
            }
1569
 
1570
          /* Don't match FPU insns with non-default coprocessor ID.  */
1571
          if (*d == '\0')
1572
            {
1573
              for (d = args; *d; d += 2)
1574
                {
1575
                  if (d[0] == 'I')
1576
                    {
1577
                      val = fetch_arg (buffer, 'd', 3, info);
1578
                      if (val != 1)
1579
                        break;
1580
                    }
1581
                }
1582
            }
1583
 
1584
          if (*d == '\0')
1585
            if ((val = match_insn_m68k (memaddr, info, opc)))
1586
              return val;
1587
        }
1588
    }
1589
  return 0;
1590
}
1591
 
1592
/* Print the m68k instruction at address MEMADDR in debugged memory,
1593
   on INFO->STREAM.  Returns length of the instruction, in bytes.  */
1594
 
1595
int
1596
print_insn_m68k (bfd_vma memaddr, disassemble_info *info)
1597
{
1598
  unsigned int arch_mask;
1599
  struct private priv;
1600
  int val;
1601
 
1602
  bfd_byte *buffer = priv.the_buffer;
1603
 
1604
  info->private_data = & priv;
1605
  /* Tell objdump to use two bytes per chunk
1606
     and six bytes per line for displaying raw data.  */
1607
  info->bytes_per_chunk = 2;
1608
  info->bytes_per_line = 6;
1609
  info->display_endian = BFD_ENDIAN_BIG;
1610
  priv.max_fetched = priv.the_buffer;
1611
  priv.insn_start = memaddr;
1612
 
1613
  arch_mask = bfd_m68k_mach_to_features (info->mach);
1614
  if (!arch_mask)
1615
    {
1616
      /* First try printing an m680x0 instruction.  Try printing a Coldfire
1617
         one if that fails.  */
1618
      val = m68k_scan_mask (memaddr, info, m68k_mask);
1619
      if (val == 0)
1620
        val = m68k_scan_mask (memaddr, info, mcf_mask);
1621
    }
1622
  else
1623
    {
1624
      val = m68k_scan_mask (memaddr, info, arch_mask);
1625
    }
1626
 
1627
  if (val == 0)
1628
    /* Handle undefined instructions.  */
1629
    info->fprintf_func (info->stream, ".short 0x%04x", (buffer[0] << 8) + buffer[1]);
1630
 
1631
  return val ? val : 2;
1632
}

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.