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[/] [openrisc/] [trunk/] [gnu-old/] [gdb-6.8/] [bfd/] [cpu-sh.c] - Blame information for rev 823

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1 24 jeremybenn
/* BFD library support routines for the Renesas / SuperH SH architecture.
2
   Copyright 1993, 1994, 1997, 1998, 2000, 2001, 2002, 2003, 2004, 2005,
3
   2007 Free Software Foundation, Inc.
4
   Hacked by Steve Chamberlain of Cygnus Support.
5
 
6
   This file is part of BFD, the Binary File Descriptor library.
7
 
8
   This program 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 of the License, or
11
   (at your option) any later version.
12
 
13
   This program is distributed in the hope that it will be useful,
14
   but WITHOUT ANY WARRANTY; without even the implied warranty of
15
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16
   GNU General Public 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 "bfd.h"
25
#include "libbfd.h"
26
#include "../opcodes/sh-opc.h"
27
 
28
#define SH_NEXT                            arch_info_struct + 0
29
#define SH2_NEXT                           arch_info_struct + 1
30
#define SH2E_NEXT                          arch_info_struct + 2
31
#define SH_DSP_NEXT                        arch_info_struct + 3
32
#define SH3_NEXT                           arch_info_struct + 4
33
#define SH3_NOMMU_NEXT                     arch_info_struct + 5
34
#define SH3_DSP_NEXT                       arch_info_struct + 6
35
#define SH3E_NEXT                          arch_info_struct + 7
36
#define SH4_NEXT                           arch_info_struct + 8
37
#define SH4A_NEXT                          arch_info_struct + 9
38
#define SH4AL_DSP_NEXT                     arch_info_struct + 10
39
#define SH4_NOFPU_NEXT                     arch_info_struct + 11
40
#define SH4_NOMMU_NOFPU_NEXT               arch_info_struct + 12
41
#define SH4A_NOFPU_NEXT                    arch_info_struct + 13
42
#define SH2A_NEXT                          arch_info_struct + 14
43
#define SH2A_NOFPU_NEXT                    arch_info_struct + 15
44
#define SH2A_NOFPU_OR_SH4_NOMMU_NOFPU_NEXT arch_info_struct + 16
45
#define SH2A_NOFPU_OR_SH3_NOMMU_NEXT       arch_info_struct + 17
46
#define SH2A_OR_SH4_NEXT                   arch_info_struct + 18
47
#define SH2A_OR_SH3E_NEXT                  arch_info_struct + 19
48
#define SH64_NEXT                          NULL
49
 
50
static const bfd_arch_info_type arch_info_struct[] =
51
{
52
  {
53
    32,                         /* 32 bits in a word.  */
54
    32,                         /* 32 bits in an address.  */
55
    8,                          /* 8 bits in a byte.  */
56
    bfd_arch_sh,
57
    bfd_mach_sh2,
58
    "sh",                       /* Architecture name.  */
59
    "sh2",                      /* Machine name.  */
60
    1,
61
    FALSE,                      /* Not the default.  */
62
    bfd_default_compatible,
63
    bfd_default_scan,
64
    SH2_NEXT
65
  },
66
  {
67
    32,                         /* 32 bits in a word.  */
68
    32,                         /* 32 bits in an address.  */
69
    8,                          /* 8 bits in a byte.  */
70
    bfd_arch_sh,
71
    bfd_mach_sh2e,
72
    "sh",                       /* Architecture name.  */
73
    "sh2e",                     /* Machine name.  */
74
    1,
75
    FALSE,                      /* Not the default.  */
76
    bfd_default_compatible,
77
    bfd_default_scan,
78
    SH2E_NEXT
79
  },
80
  {
81
    32,                         /* 32 bits in a word.  */
82
    32,                         /* 32 bits in an address.  */
83
    8,                          /* 8 bits in a byte.  */
84
    bfd_arch_sh,
85
    bfd_mach_sh_dsp,
86
    "sh",                       /* Architecture name.   */
87
    "sh-dsp",                   /* Machine name.  */
88
    1,
89
    FALSE,                      /* Not the default.  */
90
    bfd_default_compatible,
91
    bfd_default_scan,
92
    SH_DSP_NEXT
93
  },
94
  {
95
    32,                         /* 32 bits in a word.  */
96
    32,                         /* 32 bits in an address.  */
97
    8,                          /* 8 bits in a byte.  */
98
    bfd_arch_sh,
99
    bfd_mach_sh3,
100
    "sh",                       /* Architecture name.   */
101
    "sh3",                      /* Machine name.  */
102
    1,
103
    FALSE,                      /* Not the default.  */
104
    bfd_default_compatible,
105
    bfd_default_scan,
106
    SH3_NEXT
107
  },
108
  {
109
    32,                         /* 32 bits in a word.  */
110
    32,                         /* 32 bits in an address.  */
111
    8,                          /* 8 bits in a byte.  */
112
    bfd_arch_sh,
113
    bfd_mach_sh3_nommu,
114
    "sh",                       /* Architecture name.   */
115
    "sh3-nommu",                /* Machine name.  */
116
    1,
117
    FALSE,                      /* Not the default.  */
118
    bfd_default_compatible,
119
    bfd_default_scan,
120
    SH3_NOMMU_NEXT
121
  },
122
  {
123
    32,                         /* 32 bits in a word.  */
124
    32,                         /* 32 bits in an address.  */
125
    8,                          /* 8 bits in a byte.  */
126
    bfd_arch_sh,
127
    bfd_mach_sh3_dsp,
128
    "sh",                       /* Architecture name.   */
129
    "sh3-dsp",                  /* Machine name.  */
130
    1,
131
    FALSE,                      /* Not the default.  */
132
    bfd_default_compatible,
133
    bfd_default_scan,
134
    SH3_DSP_NEXT
135
  },
136
  {
137
    32,                         /* 32 bits in a word.  */
138
    32,                         /* 32 bits in an address.  */
139
    8,                          /* 8 bits in a byte.  */
140
    bfd_arch_sh,
141
    bfd_mach_sh3e,
142
    "sh",                       /* Architecture name.   */
143
    "sh3e",                     /* Machine name.  */
144
    1,
145
    FALSE,                      /* Not the default.  */
146
    bfd_default_compatible,
147
    bfd_default_scan,
148
    SH3E_NEXT
149
  },
150
  {
151
    32,                         /* 32 bits in a word.  */
152
    32,                         /* 32 bits in an address.  */
153
    8,                          /* 8 bits in a byte.  */
154
    bfd_arch_sh,
155
    bfd_mach_sh4,
156
    "sh",                       /* Architecture name.   */
157
    "sh4",                      /* Machine name.  */
158
    1,
159
    FALSE,                      /* Not the default.  */
160
    bfd_default_compatible,
161
    bfd_default_scan,
162
    SH4_NEXT
163
  },
164
  {
165
    32,                         /* 32 bits in a word.  */
166
    32,                         /* 32 bits in an address.  */
167
    8,                          /* 8 bits in a byte.  */
168
    bfd_arch_sh,
169
    bfd_mach_sh4a,
170
    "sh",                       /* Architecture name.   */
171
    "sh4a",                     /* Machine name.  */
172
    1,
173
    FALSE,                      /* Not the default.  */
174
    bfd_default_compatible,
175
    bfd_default_scan,
176
    SH4A_NEXT
177
  },
178
  {
179
    32,                         /* 32 bits in a word.  */
180
    32,                         /* 32 bits in an address.  */
181
    8,                          /* 8 bits in a byte.  */
182
    bfd_arch_sh,
183
    bfd_mach_sh4al_dsp,
184
    "sh",                       /* Architecture name.   */
185
    "sh4al-dsp",                /* Machine name.  */
186
    1,
187
    FALSE,                      /* Not the default.  */
188
    bfd_default_compatible,
189
    bfd_default_scan,
190
    SH4AL_DSP_NEXT
191
  },
192
  {
193
    32,                         /* 32 bits in a word.  */
194
    32,                         /* 32 bits in an address.  */
195
    8,                          /* 8 bits in a byte.  */
196
    bfd_arch_sh,
197
    bfd_mach_sh4_nofpu,
198
    "sh",                       /* Architecture name.   */
199
    "sh4-nofpu",                /* Machine name.  */
200
    1,
201
    FALSE,                      /* Not the default.  */
202
    bfd_default_compatible,
203
    bfd_default_scan,
204
    SH4_NOFPU_NEXT
205
  },
206
  {
207
    32,                         /* 32 bits in a word.  */
208
    32,                         /* 32 bits in an address.  */
209
    8,                          /* 8 bits in a byte.  */
210
    bfd_arch_sh,
211
    bfd_mach_sh4_nommu_nofpu,
212
    "sh",                       /* Architecture name.   */
213
    "sh4-nommu-nofpu",          /* Machine name.  */
214
    1,
215
    FALSE,                      /* Not the default.  */
216
    bfd_default_compatible,
217
    bfd_default_scan,
218
    SH4_NOMMU_NOFPU_NEXT
219
  },
220
  {
221
    32,                         /* 32 bits in a word.  */
222
    32,                         /* 32 bits in an address.  */
223
    8,                          /* 8 bits in a byte.  */
224
    bfd_arch_sh,
225
    bfd_mach_sh4a_nofpu,
226
    "sh",                       /* Architecture name.   */
227
    "sh4a-nofpu",               /* Machine name.  */
228
    1,
229
    FALSE,                      /* Not the default.  */
230
    bfd_default_compatible,
231
    bfd_default_scan,
232
    SH4A_NOFPU_NEXT
233
  },
234
  {
235
    32,                         /* 32 bits in a word.  */
236
    32,                         /* 32 bits in an address.  */
237
    8,                          /* 8 bits in a byte.  */
238
    bfd_arch_sh,
239
    bfd_mach_sh2a,
240
    "sh",                       /* Architecture name.  */
241
    "sh2a",                     /* Machine name.  */
242
    1,
243
    FALSE,                      /* Not the default.  */
244
    bfd_default_compatible,
245
    bfd_default_scan,
246
    SH2A_NEXT
247
  },
248
  {
249
    32,                         /* 32 bits in a word.  */
250
    32,                         /* 32 bits in an address.  */
251
    8,                          /* 8 bits in a byte.  */
252
    bfd_arch_sh,
253
    bfd_mach_sh2a_nofpu,
254
    "sh",                       /* Architecture name.  */
255
    "sh2a-nofpu",               /* Machine name.  */
256
    1,
257
    FALSE,                      /* Not the default.  */
258
    bfd_default_compatible,
259
    bfd_default_scan,
260
    SH2A_NOFPU_NEXT
261
  },
262
  {
263
    32,                         /* 32 bits in a word.  */
264
    32,                         /* 32 bits in an address.  */
265
    8,                          /* 8 bits in a byte.  */
266
    bfd_arch_sh,
267
    bfd_mach_sh2a_nofpu_or_sh4_nommu_nofpu,
268
    "sh",                       /* Architecture name.  */
269
    "sh2a-nofpu-or-sh4-nommu-nofpu",            /* Machine name.  */
270
    1,
271
    FALSE,                      /* Not the default.  */
272
    bfd_default_compatible,
273
    bfd_default_scan,
274
    SH2A_NOFPU_OR_SH4_NOMMU_NOFPU_NEXT
275
  },
276
  {
277
    32,                         /* 32 bits in a word.  */
278
    32,                         /* 32 bits in an address.  */
279
    8,                          /* 8 bits in a byte.  */
280
    bfd_arch_sh,
281
    bfd_mach_sh2a_nofpu_or_sh3_nommu,
282
    "sh",                       /* Architecture name. .  */
283
    "sh2a-nofpu-or-sh3-nommu",  /* Machine name.  */
284
    1,
285
    FALSE,                      /* Not the default.  */
286
    bfd_default_compatible,
287
    bfd_default_scan,
288
    SH2A_NOFPU_OR_SH3_NOMMU_NEXT
289
  },
290
  {
291
    32,                         /* 32 bits in a word.  */
292
    32,                         /* 32 bits in an address.  */
293
    8,                          /* 8 bits in a byte.  */
294
    bfd_arch_sh,
295
    bfd_mach_sh2a_or_sh4,
296
    "sh",                       /* Architecture name.  */
297
    "sh2a-or-sh4",              /* Machine name.  */
298
    1,
299
    FALSE,                      /* Not the default.  */
300
    bfd_default_compatible,
301
    bfd_default_scan,
302
    SH2A_OR_SH4_NEXT
303
  },
304
  {
305
    32,                         /* 32 bits in a word.  */
306
    32,                         /* 32 bits in an address.  */
307
    8,                          /* 8 bits in a byte.  */
308
    bfd_arch_sh,
309
    bfd_mach_sh2a_or_sh3e,
310
    "sh",                       /* Architecture name.  */
311
    "sh2a-or-sh3e",             /* Machine name.  */
312
    1,
313
    FALSE,                      /* Not the default.  */
314
    bfd_default_compatible,
315
    bfd_default_scan,
316
    SH2A_OR_SH3E_NEXT
317
  },
318
  {
319
    64,                         /* 64 bits in a word.  */
320
    64,                         /* 64 bits in an address.  */
321
    8,                          /* 8 bits in a byte.  */
322
    bfd_arch_sh,
323
    bfd_mach_sh5,
324
    "sh",                       /* Architecture name.   */
325
    "sh5",                      /* Machine name.  */
326
    1,
327
    FALSE,                      /* Not the default.  */
328
    bfd_default_compatible,
329
    bfd_default_scan,
330
    SH64_NEXT
331
  },
332
};
333
 
334
const bfd_arch_info_type bfd_sh_arch =
335
{
336
  32,                           /* 32 bits in a word.  */
337
  32,                           /* 32 bits in an address.  */
338
  8,                            /* 8 bits in a byte.  */
339
  bfd_arch_sh,
340
  bfd_mach_sh,
341
  "sh",                         /* Architecture name.   */
342
  "sh",                         /* Machine name.  */
343
  1,
344
  TRUE,                         /* The default machine.  */
345
  bfd_default_compatible,
346
  bfd_default_scan,
347
  SH_NEXT
348
};
349
 
350
 
351
/* This table defines the mappings from the BFD internal numbering
352
   system to the opcodes internal flags system.
353
   It is used by the functions defined below.
354
   The prototypes for these SH specific functions are found in
355
   sh-opc.h .  */
356
 
357
static struct { unsigned long bfd_mach, arch, arch_up; } bfd_to_arch_table[] =
358
{
359
  { bfd_mach_sh,              arch_sh1,             arch_sh_up },
360
  { bfd_mach_sh2,             arch_sh2,             arch_sh2_up },
361
  { bfd_mach_sh2e,            arch_sh2e,            arch_sh2e_up },
362
  { bfd_mach_sh_dsp,          arch_sh_dsp,          arch_sh_dsp_up },
363
  { bfd_mach_sh2a,            arch_sh2a,            arch_sh2a_up },
364
  { bfd_mach_sh2a_nofpu,      arch_sh2a_nofpu,      arch_sh2a_nofpu_up },
365
 
366
  { bfd_mach_sh2a_nofpu_or_sh4_nommu_nofpu,         arch_sh2a_nofpu_or_sh4_nommu_nofpu,   arch_sh2a_nofpu_or_sh4_nommu_nofpu_up },
367
  { bfd_mach_sh2a_nofpu_or_sh3_nommu,               arch_sh2a_nofpu_or_sh3_nommu,         arch_sh2a_nofpu_or_sh3_nommu_up },
368
  { bfd_mach_sh2a_or_sh4,     arch_sh2a_or_sh4,     arch_sh2a_or_sh4_up },
369
  { bfd_mach_sh2a_or_sh3e,    arch_sh2a_or_sh3e,    arch_sh2a_or_sh3e_up },
370
 
371
  { bfd_mach_sh3,             arch_sh3,             arch_sh3_up },
372
  { bfd_mach_sh3_nommu,       arch_sh3_nommu,       arch_sh3_nommu_up },
373
  { bfd_mach_sh3_dsp,         arch_sh3_dsp,         arch_sh3_dsp_up },
374
  { bfd_mach_sh3e,            arch_sh3e,            arch_sh3e_up },
375
  { bfd_mach_sh4,             arch_sh4,             arch_sh4_up },
376
  { bfd_mach_sh4a,            arch_sh4a,            arch_sh4a_up },
377
  { bfd_mach_sh4al_dsp,       arch_sh4al_dsp,       arch_sh4al_dsp_up },
378
  { bfd_mach_sh4_nofpu,       arch_sh4_nofpu,       arch_sh4_nofpu_up },
379
  { bfd_mach_sh4_nommu_nofpu, arch_sh4_nommu_nofpu, arch_sh4_nommu_nofpu_up },
380
  { bfd_mach_sh4a_nofpu,      arch_sh4a_nofpu,      arch_sh4a_nofpu_up },
381
  { 0, 0, 0 }   /* Terminator.  */
382
};
383
 
384
 
385
/* Convert a BFD mach number into the right opcodes arch flags
386
   using the table above.  */
387
 
388
unsigned int
389
sh_get_arch_from_bfd_mach (unsigned long mach)
390
{
391
  int i = 0;
392
 
393
  while (bfd_to_arch_table[i].bfd_mach != 0)
394
    if (bfd_to_arch_table[i].bfd_mach == mach)
395
      return bfd_to_arch_table[i].arch;
396
    else
397
      i++;
398
 
399
  /* Machine not found.   */
400
  BFD_FAIL();
401
 
402
  return SH_ARCH_UNKNOWN_ARCH;
403
}
404
 
405
 
406
/* Convert a BFD mach number into a set of opcodes arch flags
407
   describing all the compatible architectures (i.e. arch_up)
408
   using the table above.  */
409
 
410
unsigned int
411
sh_get_arch_up_from_bfd_mach (unsigned long mach)
412
{
413
  int i = 0;
414
 
415
  while (bfd_to_arch_table[i].bfd_mach != 0)
416
    if (bfd_to_arch_table[i].bfd_mach == mach)
417
      return bfd_to_arch_table[i].arch_up;
418
    else
419
      i++;
420
 
421
  /* Machine not found.  */
422
  BFD_FAIL();
423
 
424
  return SH_ARCH_UNKNOWN_ARCH;
425
}
426
 
427
 
428
/* Convert an arbitary arch_set - not necessarily corresponding
429
   directly to anything in the table above - to the most generic
430
   architecture which supports all the required features, and
431
   return the corresponding BFD mach.  */
432
 
433
unsigned long
434
sh_get_bfd_mach_from_arch_set (unsigned int arch_set)
435
{
436
  unsigned long result = 0;
437
  unsigned int best = ~arch_set;
438
  unsigned int co_mask = ~0;
439
  int i = 0;
440
 
441
  /* If arch_set permits variants with no coprocessor then do not allow
442
     the other irrelevant co-processor bits to influence the choice:
443
       e.g. if dsp is disallowed by arch_set, then the algorithm would
444
       prefer fpu variants over nofpu variants because they also disallow
445
       dsp - even though the nofpu would be the most correct choice.
446
     This assumes that EVERY fpu/dsp variant has a no-coprocessor
447
     counter-part, or their non-fpu/dsp instructions do not have the
448
     no co-processor bit set.  */
449
  if (arch_set & arch_sh_no_co)
450
    co_mask = ~(arch_sh_sp_fpu | arch_sh_dp_fpu | arch_sh_has_dsp);
451
 
452
  while (bfd_to_arch_table[i].bfd_mach != 0)
453
    {
454
      unsigned int try = bfd_to_arch_table[i].arch_up & co_mask;
455
 
456
      /* Conceptually: Find the architecture with the least number
457
         of extra features or, if they have the same number, then
458
         the greatest number of required features.  Disregard
459
         architectures where the required features alone do
460
         not describe a valid architecture.  */
461
      if (((try & ~arch_set) < (best & ~arch_set)
462
           || ((try & ~arch_set) == (best & ~arch_set)
463
               && (~try & arch_set) < (~best & arch_set)))
464
          && SH_MERGE_ARCH_SET_VALID (try, arch_set))
465
        {
466
          result = bfd_to_arch_table[i].bfd_mach;
467
          best = try;
468
        }
469
 
470
      i++;
471
    }
472
 
473
  /* This might happen if a new variant is added to sh-opc.h
474
     but no corresponding entry is added to the table above.  */
475
  BFD_ASSERT (result != 0);
476
 
477
  return result;
478
}
479
 
480
 
481
/* Merge the architecture type of two BFD files, such that the
482
   resultant architecture supports all the features required
483
   by the two input BFDs.
484
   If the input BFDs are multually incompatible - i.e. one uses
485
   DSP while the other uses FPU - or there is no known architecture
486
   that fits the requirements then an error is emitted.  */
487
 
488
bfd_boolean
489
sh_merge_bfd_arch (bfd *ibfd, bfd *obfd)
490
{
491
  unsigned int old_arch, new_arch, merged_arch;
492
 
493
  if (! _bfd_generic_verify_endian_match (ibfd, obfd))
494
    return FALSE;
495
 
496
  old_arch = sh_get_arch_up_from_bfd_mach (bfd_get_mach (obfd));
497
  new_arch = sh_get_arch_up_from_bfd_mach (bfd_get_mach (ibfd));
498
 
499
  merged_arch = SH_MERGE_ARCH_SET (old_arch, new_arch);
500
 
501
  if (!SH_VALID_CO_ARCH_SET (merged_arch))
502
    {
503
      (*_bfd_error_handler)
504
        ("%B: uses %s instructions while previous modules use %s instructions",
505
         ibfd,
506
         SH_ARCH_SET_HAS_DSP (new_arch) ? "dsp" : "floating point",
507
         SH_ARCH_SET_HAS_DSP (new_arch) ? "floating point" : "dsp");
508
      bfd_set_error (bfd_error_bad_value);
509
      return FALSE;
510
    }
511
  else if (!SH_VALID_ARCH_SET (merged_arch))
512
    {
513
      (*_bfd_error_handler)
514
        ("internal error: merge of architecture '%s' with architecture '%s' produced unknown architecture\n",
515
         bfd_printable_name (obfd),
516
         bfd_printable_name (ibfd));
517
      bfd_set_error (bfd_error_bad_value);
518
      return FALSE;
519
    }
520
 
521
  bfd_default_set_arch_mach (obfd, bfd_arch_sh,
522
                             sh_get_bfd_mach_from_arch_set (merged_arch));
523
 
524
  return TRUE;
525
}

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