aboutsummaryrefslogtreecommitdiff
path: root/gdb/memattr.c
blob: e8eb56a458b17f91b70337b94b62b1cd19a3fd02 (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
/* Memory attributes support, for GDB.
   Copyright 2001 Free Software Foundation, Inc.

   This file is part of GDB.

   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 2 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., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#include "defs.h"
#include "command.h"
#include "gdbcmd.h"
#include "memattr.h"
#include "target.h"
#include "value.h"
#include "language.h"
#include "gdb_string.h"

const struct mem_attrib default_mem_attrib =
{
  MEM_RW,			/* mode */
  MEM_WIDTH_UNSPECIFIED,
  false,			/* hwbreak */
  false,			/* cache */
  false				/* verify */
};

static struct mem_region *mem_region_chain = NULL;
static int mem_number = 0;

static struct mem_region *
create_mem_region (CORE_ADDR lo, CORE_ADDR hi,
		   const struct mem_attrib *attrib)
{
  struct mem_region *n, *new;

  if (lo > hi)
    {
      printf_unfiltered ("invalid memory region\n");
      return NULL;
    }

  n = mem_region_chain;
  while (n)
    {
      /* overlapping node */
      if ((lo >= n->lo && lo <= n->hi) ||
	  (hi >= n->lo && hi <= n->hi))
	{
	  printf_unfiltered ("overlapping memory region\n");
	  return NULL;
	}
      n = n->next;
    }

  new = xmalloc (sizeof (struct mem_region));
  new->lo = lo;
  new->hi = hi;
  new->number = ++mem_number;
  new->enabled_p = 1;
  new->attrib = *attrib;

  /* link in new node */
  new->next = mem_region_chain;
  mem_region_chain = new;

  return new;
}

static void
delete_mem_region (struct mem_region *m)
{
  xfree (m);
}

/*
 * Look up the memory region cooresponding to ADDR.
 */
struct mem_region *
lookup_mem_region (CORE_ADDR addr)
{
  static struct mem_region region;
  struct mem_region *m;
  CORE_ADDR lo;
  CORE_ADDR hi;

  /* First we initialize LO and HI so that they describe the entire
     memory space.  As we process the memory region chain, they are
     redefined to describe the minimal region containing ADDR.  LO
     and HI are used in the case where no memory region is defined
     that contains ADDR.  If a memory region is disabled, it is
     treated as if it does not exist.  */

  lo = (CORE_ADDR) 0;
  hi = (CORE_ADDR) ~ 0;

  for (m = mem_region_chain; m; m = m->next)
    {
      if (m->enabled_p == 1)
	{
	  if (addr >= m->lo && addr < m->hi)
	    return m;

	  if (addr >= m->hi && lo < m->hi)
	    lo = m->hi;

	  if (addr <= m->lo && hi > m->lo)
	    hi = m->lo;
	}
    }

  /* Because no region was found, we must cons up one based on what
     was learned above.  */
  region.lo = lo;
  region.hi = hi;
  region.attrib = default_mem_attrib;
  return &region;
}


static void
mem_command (char *args, int from_tty)
{
  CORE_ADDR lo, hi;
  char *tok;
  struct mem_attrib attrib;

  if (!args)
    error_no_arg ("No mem");

  tok = strtok (args, " \t");
  if (!tok)
    error ("no lo address");
  lo = parse_and_eval_address (tok);

  tok = strtok (NULL, " \t");
  if (!tok)
    error ("no hi address");
  hi = parse_and_eval_address (tok);

  attrib = default_mem_attrib;
  while ((tok = strtok (NULL, " \t")) != NULL)
    {
      if (strcmp (tok, "rw") == 0)
	attrib.mode = MEM_RW;
      else if (strcmp (tok, "ro") == 0)
	attrib.mode = MEM_RO;
      else if (strcmp (tok, "wo") == 0)
	attrib.mode = MEM_WO;

      else if (strcmp (tok, "8") == 0)
	attrib.width = MEM_WIDTH_8;
      else if (strcmp (tok, "16") == 0)
	{
	  if ((lo % 2 != 0) || (hi % 2 != 0))
	    error ("region bounds not 16 bit aligned");
	  attrib.width = MEM_WIDTH_16;
	}
      else if (strcmp (tok, "32") == 0)
	{
	  if ((lo % 4 != 0) || (hi % 4 != 0))
	    error ("region bounds not 32 bit aligned");
	  attrib.width = MEM_WIDTH_32;
	}
      else if (strcmp (tok, "64") == 0)
	{
	  if ((lo % 8 != 0) || (hi % 8 != 0))
	    error ("region bounds not 64 bit aligned");
	  attrib.width = MEM_WIDTH_64;
	}

#if 0
      else if (strcmp (tok, "hwbreak") == 0)
	attrib.hwbreak = true;
      else if (strcmp (tok, "swbreak") == 0)
	attrib.hwbreak = false;
#endif

      else if (strcmp (tok, "cache") == 0)
	attrib.cache = true;
      else if (strcmp (tok, "nocache") == 0)
	attrib.cache = false;

#if 0
      else if (strcmp (tok, "verify") == 0)
	attrib.verify = true;
      else if (strcmp (tok, "noverify") == 0)
	attrib.verify = false;
#endif

      else
	error ("unknown attribute: %s", tok);
    }

  create_mem_region (lo, hi, &attrib);
}


static void
mem_info_command (char *args, int from_tty)
{
  struct mem_region *m;
  struct mem_attrib *attrib;

  if (!mem_region_chain)
    {
      printf_unfiltered ("There are no memory regions defined.\n");
      return;
    }

  printf_filtered ("Num ");
  printf_filtered ("Enb ");
  printf_filtered ("Low Addr   ");
  if (TARGET_ADDR_BIT > 32)
    printf_filtered ("        ");
  printf_filtered ("High Addr  ");
  if (TARGET_ADDR_BIT > 32)
    printf_filtered ("        ");
  printf_filtered ("Attrs ");
  printf_filtered ("\n");

  for (m = mem_region_chain; m; m = m->next)
    {
      char *tmp;
      printf_filtered ("%-3d %-3c\t",
		       m->number,
		       m->enabled_p ? 'y' : 'n');
      if (TARGET_ADDR_BIT <= 32)
	tmp = longest_local_hex_string_custom ((unsigned long) m->lo, "08l");
      else
	tmp = longest_local_hex_string_custom ((unsigned long) m->lo, "016l");
      
      printf_filtered ("%s ", tmp);
      
      if (TARGET_ADDR_BIT <= 32)
	tmp = longest_local_hex_string_custom ((unsigned long) m->hi, "08l");
      else
	tmp = longest_local_hex_string_custom ((unsigned long) m->hi, "016l");
      
      printf_filtered ("%s ", tmp);

      /* Print a token for each attribute.

       * FIXME: Should we output a comma after each token?  It may
       * make it easier for users to read, but we'd lose the ability
       * to cut-and-paste the list of attributes when defining a new
       * region.  Perhaps that is not important.
       *
       * FIXME: If more attributes are added to GDB, the output may
       * become cluttered and difficult for users to read.  At that
       * time, we may want to consider printing tokens only if they
       * are different from the default attribute.  */

      attrib = &m->attrib;
      switch (attrib->mode)
	{
	case MEM_RW:
	  printf_filtered ("rw ");
	  break;
	case MEM_RO:
	  printf_filtered ("ro ");
	  break;
	case MEM_WO:
	  printf_filtered ("wo ");
	  break;
	}

      switch (attrib->width)
	{
	case MEM_WIDTH_8:
	  printf_filtered ("8 ");
	  break;
	case MEM_WIDTH_16:
	  printf_filtered ("16 ");
	  break;
	case MEM_WIDTH_32:
	  printf_filtered ("32 ");
	  break;
	case MEM_WIDTH_64:
	  printf_filtered ("64 ");
	  break;
	case MEM_WIDTH_UNSPECIFIED:
	  break;
	}

#if 0
      if (attrib->hwbreak)
	printf_filtered ("hwbreak");
      else
	printf_filtered ("swbreak");
#endif

      if (attrib->cache)
	printf_filtered ("cache ");
      else
	printf_filtered ("nocache ");

#if 0
      if (attrib->verify)
	printf_filtered ("verify ");
      else
	printf_filtered ("noverify ");
#endif

      printf_filtered ("\n");

      gdb_flush (gdb_stdout);
    }
}


/* Enable the memory region number NUM. */

static void
mem_enable (int num)
{
  struct mem_region *m;

  for (m = mem_region_chain; m; m = m->next)
    if (m->number == num)
      {
	m->enabled_p = 1;
	return;
      }
  printf_unfiltered ("No memory region number %d.\n", num);
}

static void
mem_enable_command (char *args, int from_tty)
{
  char *p = args;
  char *p1;
  int num;
  struct mem_region *m;

  dcache_invalidate (target_dcache);

  if (p == 0)
    {
      for (m = mem_region_chain; m; m = m->next)
	m->enabled_p = 1;
    }
  else
    while (*p)
      {
	p1 = p;
	while (*p1 >= '0' && *p1 <= '9')
	  p1++;
	if (*p1 && *p1 != ' ' && *p1 != '\t')
	  error ("Arguments must be memory region numbers.");

	num = atoi (p);
	mem_enable (num);

	p = p1;
	while (*p == ' ' || *p == '\t')
	  p++;
      }
}


/* Disable the memory region number NUM. */

static void
mem_disable (int num)
{
  struct mem_region *m;

  for (m = mem_region_chain; m; m = m->next)
    if (m->number == num)
      {
	m->enabled_p = 0;
	return;
      }
  printf_unfiltered ("No memory region number %d.\n", num);
}

static void
mem_disable_command (char *args, int from_tty)
{
  char *p = args;
  char *p1;
  int num;
  struct mem_region *m;

  dcache_invalidate (target_dcache);

  if (p == 0)
    {
      for (m = mem_region_chain; m; m = m->next)
	m->enabled_p = 0;
    }
  else
    while (*p)
      {
	p1 = p;
	while (*p1 >= '0' && *p1 <= '9')
	  p1++;
	if (*p1 && *p1 != ' ' && *p1 != '\t')
	  error ("Arguments must be memory region numbers.");

	num = atoi (p);
	mem_disable (num);

	p = p1;
	while (*p == ' ' || *p == '\t')
	  p++;
      }
}

/* Clear memory region list */

static void
mem_clear (void)
{
  struct mem_region *m;

  while ((m = mem_region_chain) != 0)
    {
      mem_region_chain = m->next;
      delete_mem_region (m);
    }
}

/* Delete the memory region number NUM. */

static void
mem_delete (int num)
{
  struct mem_region *m1, *m;

  if (!mem_region_chain)
    {
      printf_unfiltered ("No memory region number %d.\n", num);
      return;
    }

  if (mem_region_chain->number == num)
    {
      m1 = mem_region_chain;
      mem_region_chain = m1->next;
      delete_mem_region (m1);
    }
  else
    for (m = mem_region_chain; m->next; m = m->next)
      {
	if (m->next->number == num)
	  {
	    m1 = m->next;
	    m->next = m1->next;
	    delete_mem_region (m1);
	    break;
	  }
      }
}

static void
mem_delete_command (char *args, int from_tty)
{
  char *p = args;
  char *p1;
  int num;

  dcache_invalidate (target_dcache);

  if (p == 0)
    {
      if (query ("Delete all memory regions? "))
	mem_clear ();
      dont_repeat ();
      return;
    }

  while (*p)
    {
      p1 = p;
      while (*p1 >= '0' && *p1 <= '9')
	p1++;
      if (*p1 && *p1 != ' ' && *p1 != '\t')
	error ("Arguments must be memory region numbers.");

      num = atoi (p);
      mem_delete (num);

      p = p1;
      while (*p == ' ' || *p == '\t')
	p++;
    }

  dont_repeat ();
}

void
_initialize_mem ()
{
  add_com ("mem", class_vars, mem_command,
	   "Define attributes for memory region.\n\
Usage: mem <lo addr> <hi addr> [<mode> <width> <cache>], \n\
where <mode>  may be rw (read/write), ro (read-only) or wo (write-only), \n\
      <width> may be 8, 16, 32, or 64, and \n\
      <cache> may be cache or nocache");

  add_cmd ("mem", class_vars, mem_enable_command,
	   "Enable memory region.\n\
Arguments are the code numbers of the memory regions to enable.\n\
Usage: enable mem <code number>\n\
Do \"info mem\" to see current list of code numbers.", &enablelist);

  add_cmd ("mem", class_vars, mem_disable_command,
	   "Disable memory region.\n\
Arguments are the code numbers of the memory regions to disable.\n\
Usage: disable mem <code number>\n\
Do \"info mem\" to see current list of code numbers.", &disablelist);

  add_cmd ("mem", class_vars, mem_delete_command,
	   "Delete memory region.\n\
Arguments are the code numbers of the memory regions to delete.\n\
Usage: delete mem <code number>\n\
Do \"info mem\" to see current list of code numbers.", &deletelist);

  add_info ("mem", mem_info_command,
	    "Memory region attributes");
}