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[/] [openrisc/] [trunk/] [gnu-src/] [binutils-2.20.1/] [opcodes/] [cgen-dis.in] - Blame information for rev 205

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1 205 julius
/* Disassembler interface for targets using CGEN. -*- C -*-
2
   CGEN: Cpu tools GENerator
3
 
4
   THIS FILE IS MACHINE GENERATED WITH CGEN.
5
   - the resultant file is machine generated, cgen-dis.in isn't
6
 
7
   Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2005, 2007,
8
   2008  Free Software Foundation, Inc.
9
 
10
   This file is part of libopcodes.
11
 
12
   This library is free software; you can redistribute it and/or modify
13
   it under the terms of the GNU General Public License as published by
14
   the Free Software Foundation; either version 3, or (at your option)
15
   any later version.
16
 
17
   It is distributed in the hope that it will be useful, but WITHOUT
18
   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
19
   or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
20
   License for more details.
21
 
22
   You should have received a copy of the GNU General Public License
23
   along with this program; if not, write to the Free Software Foundation, Inc.,
24
   51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
25
 
26
/* ??? Eventually more and more of this stuff can go to cpu-independent files.
27
   Keep that in mind.  */
28
 
29
#include "sysdep.h"
30
#include 
31
#include "ansidecl.h"
32
#include "dis-asm.h"
33
#include "bfd.h"
34
#include "symcat.h"
35
#include "libiberty.h"
36
#include "@prefix@-desc.h"
37
#include "@prefix@-opc.h"
38
#include "opintl.h"
39
 
40
/* Default text to print if an instruction isn't recognized.  */
41
#define UNKNOWN_INSN_MSG _("*unknown*")
42
 
43
static void print_normal
44
  (CGEN_CPU_DESC, void *, long, unsigned int, bfd_vma, int);
45
static void print_address
46
  (CGEN_CPU_DESC, void *, bfd_vma, unsigned int, bfd_vma, int) ATTRIBUTE_UNUSED;
47
static void print_keyword
48
  (CGEN_CPU_DESC, void *, CGEN_KEYWORD *, long, unsigned int) ATTRIBUTE_UNUSED;
49
static void print_insn_normal
50
  (CGEN_CPU_DESC, void *, const CGEN_INSN *, CGEN_FIELDS *, bfd_vma, int);
51
static int print_insn
52
  (CGEN_CPU_DESC, bfd_vma,  disassemble_info *, bfd_byte *, unsigned);
53
static int default_print_insn
54
  (CGEN_CPU_DESC, bfd_vma, disassemble_info *) ATTRIBUTE_UNUSED;
55
static int read_insn
56
  (CGEN_CPU_DESC, bfd_vma, disassemble_info *, bfd_byte *, int, CGEN_EXTRACT_INFO *,
57
   unsigned long *);
58
 
59
/* -- disassembler routines inserted here.  */
60
 
61
/* Default print handler.  */
62
 
63
static void
64
print_normal (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
65
              void *dis_info,
66
              long value,
67
              unsigned int attrs,
68
              bfd_vma pc ATTRIBUTE_UNUSED,
69
              int length ATTRIBUTE_UNUSED)
70
{
71
  disassemble_info *info = (disassemble_info *) dis_info;
72
 
73
#ifdef CGEN_PRINT_NORMAL
74
  CGEN_PRINT_NORMAL (cd, info, value, attrs, pc, length);
75
#endif
76
 
77
  /* Print the operand as directed by the attributes.  */
78
  if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))
79
    ; /* nothing to do */
80
  else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))
81
    (*info->fprintf_func) (info->stream, "%ld", value);
82
  else
83
    (*info->fprintf_func) (info->stream, "0x%lx", value);
84
}
85
 
86
/* Default address handler.  */
87
 
88
static void
89
print_address (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
90
               void *dis_info,
91
               bfd_vma value,
92
               unsigned int attrs,
93
               bfd_vma pc ATTRIBUTE_UNUSED,
94
               int length ATTRIBUTE_UNUSED)
95
{
96
  disassemble_info *info = (disassemble_info *) dis_info;
97
 
98
#ifdef CGEN_PRINT_ADDRESS
99
  CGEN_PRINT_ADDRESS (cd, info, value, attrs, pc, length);
100
#endif
101
 
102
  /* Print the operand as directed by the attributes.  */
103
  if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SEM_ONLY))
104
    ; /* Nothing to do.  */
105
  else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_PCREL_ADDR))
106
    (*info->print_address_func) (value, info);
107
  else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_ABS_ADDR))
108
    (*info->print_address_func) (value, info);
109
  else if (CGEN_BOOL_ATTR (attrs, CGEN_OPERAND_SIGNED))
110
    (*info->fprintf_func) (info->stream, "%ld", (long) value);
111
  else
112
    (*info->fprintf_func) (info->stream, "0x%lx", (long) value);
113
}
114
 
115
/* Keyword print handler.  */
116
 
117
static void
118
print_keyword (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
119
               void *dis_info,
120
               CGEN_KEYWORD *keyword_table,
121
               long value,
122
               unsigned int attrs ATTRIBUTE_UNUSED)
123
{
124
  disassemble_info *info = (disassemble_info *) dis_info;
125
  const CGEN_KEYWORD_ENTRY *ke;
126
 
127
  ke = cgen_keyword_lookup_value (keyword_table, value);
128
  if (ke != NULL)
129
    (*info->fprintf_func) (info->stream, "%s", ke->name);
130
  else
131
    (*info->fprintf_func) (info->stream, "???");
132
}
133
 
134
/* Default insn printer.
135
 
136
   DIS_INFO is defined as `void *' so the disassembler needn't know anything
137
   about disassemble_info.  */
138
 
139
static void
140
print_insn_normal (CGEN_CPU_DESC cd,
141
                   void *dis_info,
142
                   const CGEN_INSN *insn,
143
                   CGEN_FIELDS *fields,
144
                   bfd_vma pc,
145
                   int length)
146
{
147
  const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
148
  disassemble_info *info = (disassemble_info *) dis_info;
149
  const CGEN_SYNTAX_CHAR_TYPE *syn;
150
 
151
  CGEN_INIT_PRINT (cd);
152
 
153
  for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn)
154
    {
155
      if (CGEN_SYNTAX_MNEMONIC_P (*syn))
156
        {
157
          (*info->fprintf_func) (info->stream, "%s", CGEN_INSN_MNEMONIC (insn));
158
          continue;
159
        }
160
      if (CGEN_SYNTAX_CHAR_P (*syn))
161
        {
162
          (*info->fprintf_func) (info->stream, "%c", CGEN_SYNTAX_CHAR (*syn));
163
          continue;
164
        }
165
 
166
      /* We have an operand.  */
167
      @arch@_cgen_print_operand (cd, CGEN_SYNTAX_FIELD (*syn), info,
168
                                 fields, CGEN_INSN_ATTRS (insn), pc, length);
169
    }
170
}
171
 
172
/* Subroutine of print_insn. Reads an insn into the given buffers and updates
173
   the extract info.
174
   Returns 0 if all is well, non-zero otherwise.  */
175
 
176
static int
177
read_insn (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
178
           bfd_vma pc,
179
           disassemble_info *info,
180
           bfd_byte *buf,
181
           int buflen,
182
           CGEN_EXTRACT_INFO *ex_info,
183
           unsigned long *insn_value)
184
{
185
  int status = (*info->read_memory_func) (pc, buf, buflen, info);
186
 
187
  if (status != 0)
188
    {
189
      (*info->memory_error_func) (status, pc, info);
190
      return -1;
191
    }
192
 
193
  ex_info->dis_info = info;
194
  ex_info->valid = (1 << buflen) - 1;
195
  ex_info->insn_bytes = buf;
196
 
197
  *insn_value = bfd_get_bits (buf, buflen * 8, info->endian == BFD_ENDIAN_BIG);
198
  return 0;
199
}
200
 
201
/* Utility to print an insn.
202
   BUF is the base part of the insn, target byte order, BUFLEN bytes long.
203
   The result is the size of the insn in bytes or zero for an unknown insn
204
   or -1 if an error occurs fetching data (memory_error_func will have
205
   been called).  */
206
 
207
static int
208
print_insn (CGEN_CPU_DESC cd,
209
            bfd_vma pc,
210
            disassemble_info *info,
211
            bfd_byte *buf,
212
            unsigned int buflen)
213
{
214
  CGEN_INSN_INT insn_value;
215
  const CGEN_INSN_LIST *insn_list;
216
  CGEN_EXTRACT_INFO ex_info;
217
  int basesize;
218
 
219
  /* Extract base part of instruction, just in case CGEN_DIS_* uses it. */
220
  basesize = cd->base_insn_bitsize < buflen * 8 ?
221
                                     cd->base_insn_bitsize : buflen * 8;
222
  insn_value = cgen_get_insn_value (cd, buf, basesize);
223
 
224
 
225
  /* Fill in ex_info fields like read_insn would.  Don't actually call
226
     read_insn, since the incoming buffer is already read (and possibly
227
     modified a la m32r).  */
228
  ex_info.valid = (1 << buflen) - 1;
229
  ex_info.dis_info = info;
230
  ex_info.insn_bytes = buf;
231
 
232
  /* The instructions are stored in hash lists.
233
     Pick the first one and keep trying until we find the right one.  */
234
 
235
  insn_list = CGEN_DIS_LOOKUP_INSN (cd, (char *) buf, insn_value);
236
  while (insn_list != NULL)
237
    {
238
      const CGEN_INSN *insn = insn_list->insn;
239
      CGEN_FIELDS fields;
240
      int length;
241
      unsigned long insn_value_cropped;
242
 
243
#ifdef CGEN_VALIDATE_INSN_SUPPORTED
244
      /* Not needed as insn shouldn't be in hash lists if not supported.  */
245
      /* Supported by this cpu?  */
246
      if (! @arch@_cgen_insn_supported (cd, insn))
247
        {
248
          insn_list = CGEN_DIS_NEXT_INSN (insn_list);
249
          continue;
250
        }
251
#endif
252
 
253
      /* Basic bit mask must be correct.  */
254
      /* ??? May wish to allow target to defer this check until the extract
255
         handler.  */
256
 
257
      /* Base size may exceed this instruction's size.  Extract the
258
         relevant part from the buffer. */
259
      if ((unsigned) (CGEN_INSN_BITSIZE (insn) / 8) < buflen &&
260
          (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long))
261
        insn_value_cropped = bfd_get_bits (buf, CGEN_INSN_BITSIZE (insn),
262
                                           info->endian == BFD_ENDIAN_BIG);
263
      else
264
        insn_value_cropped = insn_value;
265
 
266
      if ((insn_value_cropped & CGEN_INSN_BASE_MASK (insn))
267
          == CGEN_INSN_BASE_VALUE (insn))
268
        {
269
          /* Printing is handled in two passes.  The first pass parses the
270
             machine insn and extracts the fields.  The second pass prints
271
             them.  */
272
 
273
          /* Make sure the entire insn is loaded into insn_value, if it
274
             can fit.  */
275
          if (((unsigned) CGEN_INSN_BITSIZE (insn) > cd->base_insn_bitsize) &&
276
              (unsigned) (CGEN_INSN_BITSIZE (insn) / 8) <= sizeof (unsigned long))
277
            {
278
              unsigned long full_insn_value;
279
              int rc = read_insn (cd, pc, info, buf,
280
                                  CGEN_INSN_BITSIZE (insn) / 8,
281
                                  & ex_info, & full_insn_value);
282
              if (rc != 0)
283
                return rc;
284
              length = CGEN_EXTRACT_FN (cd, insn)
285
                (cd, insn, &ex_info, full_insn_value, &fields, pc);
286
            }
287
          else
288
            length = CGEN_EXTRACT_FN (cd, insn)
289
              (cd, insn, &ex_info, insn_value_cropped, &fields, pc);
290
 
291
          /* Length < 0 -> error.  */
292
          if (length < 0)
293
            return length;
294
          if (length > 0)
295
            {
296
              CGEN_PRINT_FN (cd, insn) (cd, info, insn, &fields, pc, length);
297
              /* Length is in bits, result is in bytes.  */
298
              return length / 8;
299
            }
300
        }
301
 
302
      insn_list = CGEN_DIS_NEXT_INSN (insn_list);
303
    }
304
 
305
  return 0;
306
}
307
 
308
/* Default value for CGEN_PRINT_INSN.
309
   The result is the size of the insn in bytes or zero for an unknown insn
310
   or -1 if an error occured fetching bytes.  */
311
 
312
#ifndef CGEN_PRINT_INSN
313
#define CGEN_PRINT_INSN default_print_insn
314
#endif
315
 
316
static int
317
default_print_insn (CGEN_CPU_DESC cd, bfd_vma pc, disassemble_info *info)
318
{
319
  bfd_byte buf[CGEN_MAX_INSN_SIZE];
320
  int buflen;
321
  int status;
322
 
323
  /* Attempt to read the base part of the insn.  */
324
  buflen = cd->base_insn_bitsize / 8;
325
  status = (*info->read_memory_func) (pc, buf, buflen, info);
326
 
327
  /* Try again with the minimum part, if min < base.  */
328
  if (status != 0 && (cd->min_insn_bitsize < cd->base_insn_bitsize))
329
    {
330
      buflen = cd->min_insn_bitsize / 8;
331
      status = (*info->read_memory_func) (pc, buf, buflen, info);
332
    }
333
 
334
  if (status != 0)
335
    {
336
      (*info->memory_error_func) (status, pc, info);
337
      return -1;
338
    }
339
 
340
  return print_insn (cd, pc, info, buf, buflen);
341
}
342
 
343
/* Main entry point.
344
   Print one instruction from PC on INFO->STREAM.
345
   Return the size of the instruction (in bytes).  */
346
 
347
typedef struct cpu_desc_list
348
{
349
  struct cpu_desc_list *next;
350
  CGEN_BITSET *isa;
351
  int mach;
352
  int endian;
353
  CGEN_CPU_DESC cd;
354
} cpu_desc_list;
355
 
356
int
357
print_insn_@arch@ (bfd_vma pc, disassemble_info *info)
358
{
359
  static cpu_desc_list *cd_list = 0;
360
  cpu_desc_list *cl = 0;
361
  static CGEN_CPU_DESC cd = 0;
362
  static CGEN_BITSET *prev_isa;
363
  static int prev_mach;
364
  static int prev_endian;
365
  int length;
366
  CGEN_BITSET *isa;
367
  int mach;
368
  int endian = (info->endian == BFD_ENDIAN_BIG
369
                ? CGEN_ENDIAN_BIG
370
                : CGEN_ENDIAN_LITTLE);
371
  enum bfd_architecture arch;
372
 
373
  /* ??? gdb will set mach but leave the architecture as "unknown" */
374
#ifndef CGEN_BFD_ARCH
375
#define CGEN_BFD_ARCH bfd_arch_@arch@
376
#endif
377
  arch = info->arch;
378
  if (arch == bfd_arch_unknown)
379
    arch = CGEN_BFD_ARCH;
380
 
381
  /* There's no standard way to compute the machine or isa number
382
     so we leave it to the target.  */
383
#ifdef CGEN_COMPUTE_MACH
384
  mach = CGEN_COMPUTE_MACH (info);
385
#else
386
  mach = info->mach;
387
#endif
388
 
389
#ifdef CGEN_COMPUTE_ISA
390
  {
391
    static CGEN_BITSET *permanent_isa;
392
 
393
    if (!permanent_isa)
394
      permanent_isa = cgen_bitset_create (MAX_ISAS);
395
    isa = permanent_isa;
396
    cgen_bitset_clear (isa);
397
    cgen_bitset_add (isa, CGEN_COMPUTE_ISA (info));
398
  }
399
#else
400
  isa = info->insn_sets;
401
#endif
402
 
403
  /* If we've switched cpu's, try to find a handle we've used before */
404
  if (cd
405
      && (cgen_bitset_compare (isa, prev_isa) != 0
406
          || mach != prev_mach
407
          || endian != prev_endian))
408
    {
409
      cd = 0;
410
      for (cl = cd_list; cl; cl = cl->next)
411
        {
412
          if (cgen_bitset_compare (cl->isa, isa) == 0 &&
413
              cl->mach == mach &&
414
              cl->endian == endian)
415
            {
416
              cd = cl->cd;
417
              prev_isa = cd->isas;
418
              break;
419
            }
420
        }
421
    }
422
 
423
  /* If we haven't initialized yet, initialize the opcode table.  */
424
  if (! cd)
425
    {
426
      const bfd_arch_info_type *arch_type = bfd_lookup_arch (arch, mach);
427
      const char *mach_name;
428
 
429
      if (!arch_type)
430
        abort ();
431
      mach_name = arch_type->printable_name;
432
 
433
      prev_isa = cgen_bitset_copy (isa);
434
      prev_mach = mach;
435
      prev_endian = endian;
436
      cd = @arch@_cgen_cpu_open (CGEN_CPU_OPEN_ISAS, prev_isa,
437
                                 CGEN_CPU_OPEN_BFDMACH, mach_name,
438
                                 CGEN_CPU_OPEN_ENDIAN, prev_endian,
439
                                 CGEN_CPU_OPEN_END);
440
      if (!cd)
441
        abort ();
442
 
443
      /* Save this away for future reference.  */
444
      cl = xmalloc (sizeof (struct cpu_desc_list));
445
      cl->cd = cd;
446
      cl->isa = prev_isa;
447
      cl->mach = mach;
448
      cl->endian = endian;
449
      cl->next = cd_list;
450
      cd_list = cl;
451
 
452
      @arch@_cgen_init_dis (cd);
453
    }
454
 
455
  /* We try to have as much common code as possible.
456
     But at this point some targets need to take over.  */
457
  /* ??? Some targets may need a hook elsewhere.  Try to avoid this,
458
     but if not possible try to move this hook elsewhere rather than
459
     have two hooks.  */
460
  length = CGEN_PRINT_INSN (cd, pc, info);
461
  if (length > 0)
462
    return length;
463
  if (length < 0)
464
    return -1;
465
 
466
  (*info->fprintf_func) (info->stream, UNKNOWN_INSN_MSG);
467
  return cd->default_insn_bitsize / 8;
468
}

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