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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-7.1/] [sim/] [common/] [sim-utils.c] - Blame information for rev 231

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1 227 jeremybenn
/* Miscellaneous simulator utilities.
2
   Copyright (C) 1997, 1998, 2007, 2008, 2009, 2010
3
   Free Software Foundation, Inc.
4
   Contributed by Cygnus Support.
5
 
6
This file is part of GDB, the GNU debugger.
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,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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GNU General Public License for more details.
17
 
18
You should have received a copy of the GNU General Public License
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along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
20
 
21
#include "sim-main.h"
22
#include "sim-assert.h"
23
 
24
#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
27
 
28
#ifdef HAVE_TIME_H
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#include <time.h>
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#endif
31
 
32
#ifdef HAVE_SYS_TIME_H
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#include <sys/time.h> /* needed by sys/resource.h */
34
#endif
35
 
36
#ifdef HAVE_SYS_RESOURCE_H
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#include <sys/resource.h>
38
#endif
39
 
40
#ifdef HAVE_STRING_H
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#include <string.h>
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#else
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#ifdef HAVE_STRINGS_H
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#include <strings.h>
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#endif
46
#endif
47
 
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#include "libiberty.h"
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#include "bfd.h"
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#include "sim-utils.h"
51
 
52
/* Global pointer to all state data.
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   Set by sim_resume.  */
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struct sim_state *current_state;
55
 
56
/* Allocate zero filled memory with xcalloc - xcalloc aborts if the
57
   allocation fails.  */
58
 
59
void *
60
zalloc (unsigned long size)
61
{
62
  return xcalloc (1, size);
63
}
64
 
65
void
66
zfree (void *data)
67
{
68
  free (data);
69
}
70
 
71
/* Allocate a sim_state struct.  */
72
 
73
SIM_DESC
74
sim_state_alloc (SIM_OPEN_KIND kind,
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                 host_callback *callback)
76
{
77
  SIM_DESC sd = ZALLOC (struct sim_state);
78
 
79
  STATE_MAGIC (sd) = SIM_MAGIC_NUMBER;
80
  STATE_CALLBACK (sd) = callback;
81
  STATE_OPEN_KIND (sd) = kind;
82
 
83
#if 0
84
  {
85
    int cpu_nr;
86
 
87
    /* Initialize the back link from the cpu struct to the state struct.  */
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    /* ??? I can envision a design where the state struct contains an array
89
       of pointers to cpu structs, rather than an array of structs themselves.
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       Implementing this is trickier as one may not know what to allocate until
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       one has parsed the args.  Parsing the args twice wouldn't be unreasonable,
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       IMHO.  If the state struct ever does contain an array of pointers then we
93
       can't do this here.
94
       ??? See also sim_post_argv_init*/
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    for (cpu_nr = 0; cpu_nr < MAX_NR_PROCESSORS; cpu_nr++)
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      {
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        CPU_STATE (STATE_CPU (sd, cpu_nr)) = sd;
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        CPU_INDEX (STATE_CPU (sd, cpu_nr)) = cpu_nr;
99
      }
100
  }
101
#endif
102
 
103
#ifdef SIM_STATE_INIT
104
  SIM_STATE_INIT (sd);
105
#endif
106
 
107
  return sd;
108
}
109
 
110
/* Free a sim_state struct.  */
111
 
112
void
113
sim_state_free (SIM_DESC sd)
114
{
115
  ASSERT (sd->base.magic == SIM_MAGIC_NUMBER);
116
 
117
#ifdef SIM_STATE_FREE
118
  SIM_STATE_FREE (sd);
119
#endif
120
 
121
  zfree (sd);
122
}
123
 
124
/* Return a pointer to the cpu data for CPU_NAME, or NULL if not found.  */
125
 
126
sim_cpu *
127
sim_cpu_lookup (SIM_DESC sd, const char *cpu_name)
128
{
129
  int i;
130
 
131
  for (i = 0; i < MAX_NR_PROCESSORS; ++i)
132
    if (strcmp (cpu_name, CPU_NAME (STATE_CPU (sd, i))) == 0)
133
      return STATE_CPU (sd, i);
134
  return NULL;
135
}
136
 
137
/* Return the prefix to use for a CPU specific message (typically an
138
   error message).  */
139
 
140
const char *
141
sim_cpu_msg_prefix (sim_cpu *cpu)
142
{
143
#if MAX_NR_PROCESSORS == 1
144
  return "";
145
#else
146
  static char *prefix;
147
 
148
  if (prefix == NULL)
149
    {
150
      int maxlen = 0;
151
      for (i = 0; i < MAX_NR_PROCESSORS; ++i)
152
        {
153
          int len = strlen (CPU_NAME (STATE_CPU (sd, i)));
154
          if (len > maxlen)
155
            maxlen = len;
156
        }
157
      prefix = (char *) xmalloc (maxlen + 5);
158
    }
159
  sprintf (prefix, "%s: ", CPU_NAME (cpu));
160
  return prefix;
161
#endif
162
}
163
 
164
/* Cover fn to sim_io_eprintf.  */
165
 
166
void
167
sim_io_eprintf_cpu (sim_cpu *cpu, const char *fmt, ...)
168
{
169
  SIM_DESC sd = CPU_STATE (cpu);
170
  va_list ap;
171
 
172
  va_start (ap, fmt);
173
  sim_io_eprintf (sd, sim_cpu_msg_prefix (cpu));
174
  sim_io_evprintf (sd, fmt, ap);
175
  va_end (ap);
176
}
177
 
178
/* Turn VALUE into a string with commas.  */
179
 
180
char *
181
sim_add_commas (char *buf, int sizeof_buf, unsigned long value)
182
{
183
  int comma = 3;
184
  char *endbuf = buf + sizeof_buf - 1;
185
 
186
  *--endbuf = '\0';
187
  do {
188
    if (comma-- == 0)
189
      {
190
        *--endbuf = ',';
191
        comma = 2;
192
      }
193
 
194
    *--endbuf = (value % 10) + '0';
195
  } while ((value /= 10) != 0);
196
 
197
  return endbuf;
198
}
199
 
200
/* Analyze PROG_NAME/PROG_BFD and set these fields in the state struct:
201
   STATE_ARCHITECTURE, if not set already and can be determined from the bfd
202
   STATE_PROG_BFD
203
   STATE_START_ADDR
204
   STATE_TEXT_SECTION
205
   STATE_TEXT_START
206
   STATE_TEXT_END
207
 
208
   PROG_NAME is the file name of the executable or NULL.
209
   PROG_BFD is its bfd or NULL.
210
 
211
   If both PROG_NAME and PROG_BFD are NULL, this function returns immediately.
212
   If PROG_BFD is not NULL, PROG_NAME is ignored.
213
 
214
   Implicit inputs: STATE_MY_NAME(sd), STATE_TARGET(sd),
215
                    STATE_ARCHITECTURE(sd).
216
 
217
   A new bfd is created so the app isn't required to keep its copy of the
218
   bfd open.  */
219
 
220
SIM_RC
221
sim_analyze_program (sd, prog_name, prog_bfd)
222
     SIM_DESC sd;
223
     char *prog_name;
224
     bfd *prog_bfd;
225
{
226
  asection *s;
227
  SIM_ASSERT (STATE_MAGIC (sd) == SIM_MAGIC_NUMBER);
228
 
229
  if (prog_bfd != NULL)
230
    {
231
      if (prog_bfd == STATE_PROG_BFD (sd))
232
        /* already analyzed */
233
        return SIM_RC_OK;
234
      else
235
        /* duplicate needed, save the name of the file to be re-opened */
236
        prog_name = bfd_get_filename (prog_bfd);
237
    }
238
 
239
  /* do we need to duplicate anything? */
240
  if (prog_name == NULL)
241
    return SIM_RC_OK;
242
 
243
  /* open a new copy of the prog_bfd */
244
  prog_bfd = bfd_openr (prog_name, STATE_TARGET (sd));
245
  if (prog_bfd == NULL)
246
    {
247
      sim_io_eprintf (sd, "%s: can't open \"%s\": %s\n",
248
                      STATE_MY_NAME (sd),
249
                      prog_name,
250
                      bfd_errmsg (bfd_get_error ()));
251
      return SIM_RC_FAIL;
252
    }
253
  if (!bfd_check_format (prog_bfd, bfd_object))
254
    {
255
      sim_io_eprintf (sd, "%s: \"%s\" is not an object file: %s\n",
256
                      STATE_MY_NAME (sd),
257
                      prog_name,
258
                      bfd_errmsg (bfd_get_error ()));
259
      bfd_close (prog_bfd);
260
      return SIM_RC_FAIL;
261
    }
262
  if (STATE_ARCHITECTURE (sd) != NULL)
263
    bfd_set_arch_info (prog_bfd, STATE_ARCHITECTURE (sd));
264
  else
265
    {
266
      if (bfd_get_arch (prog_bfd) != bfd_arch_unknown
267
          && bfd_get_arch (prog_bfd) != bfd_arch_obscure)
268
        {
269
          STATE_ARCHITECTURE (sd) = bfd_get_arch_info (prog_bfd);
270
        }
271
    }
272
 
273
  /* update the sim structure */
274
  if (STATE_PROG_BFD (sd) != NULL)
275
    bfd_close (STATE_PROG_BFD (sd));
276
  STATE_PROG_BFD (sd) = prog_bfd;
277
  STATE_START_ADDR (sd) = bfd_get_start_address (prog_bfd);
278
 
279
  for (s = prog_bfd->sections; s; s = s->next)
280
    if (strcmp (bfd_get_section_name (prog_bfd, s), ".text") == 0)
281
      {
282
        STATE_TEXT_SECTION (sd) = s;
283
        STATE_TEXT_START (sd) = bfd_get_section_vma (prog_bfd, s);
284
        STATE_TEXT_END (sd) = STATE_TEXT_START (sd) + bfd_section_size (prog_bfd, s);
285
        break;
286
      }
287
 
288
  bfd_cache_close (prog_bfd);
289
 
290
  return SIM_RC_OK;
291
}
292
 
293
/* Simulator timing support.  */
294
 
295
/* Called before sim_elapsed_time_since to get a reference point.  */
296
 
297
SIM_ELAPSED_TIME
298
sim_elapsed_time_get ()
299
{
300
#ifdef HAVE_GETRUSAGE
301
  struct rusage mytime;
302
  if (getrusage (RUSAGE_SELF, &mytime) == 0)
303
    return 1 + (SIM_ELAPSED_TIME) (((double) mytime.ru_utime.tv_sec * 1000) + (((double) mytime.ru_utime.tv_usec + 500) / 1000));
304
  return 1;
305
#else
306
#ifdef HAVE_TIME
307
  return 1 + (SIM_ELAPSED_TIME) time ((time_t) 0);
308
#else
309
  return 1;
310
#endif
311
#endif
312
}
313
 
314
/* Return the elapsed time in milliseconds since START.
315
   The actual time may be cpu usage (preferred) or wall clock.  */
316
 
317
unsigned long
318
sim_elapsed_time_since (start)
319
     SIM_ELAPSED_TIME start;
320
{
321
#ifdef HAVE_GETRUSAGE
322
  return sim_elapsed_time_get () - start;
323
#else
324
#ifdef HAVE_TIME
325
  return (sim_elapsed_time_get () - start) * 1000;
326
#else
327
  return 0;
328
#endif
329
#endif
330
}
331
 
332
 
333
 
334
/* do_command but with printf style formatting of the arguments */
335
void
336
sim_do_commandf (SIM_DESC sd,
337
                 const char *fmt,
338
                 ...)
339
{
340
  va_list ap;
341
  char *buf;
342
  va_start (ap, fmt);
343
  vasprintf (&buf, fmt, ap);
344
  sim_do_command (sd, buf);
345
  va_end (ap);
346
  free (buf);
347
}
348
 
349
 
350
/* sim-basics.h defines a number of enumerations, convert each of them
351
   to a string representation */
352
const char *
353
map_to_str (unsigned map)
354
{
355
  switch (map)
356
    {
357
    case read_map: return "read";
358
    case write_map: return "write";
359
    case exec_map: return "exec";
360
    case io_map: return "io";
361
    default:
362
      {
363
        static char str[10];
364
        sprintf (str, "(%ld)", (long) map);
365
        return str;
366
      }
367
    }
368
}
369
 
370
const char *
371
access_to_str (unsigned access)
372
{
373
  switch (access)
374
    {
375
    case access_invalid: return "invalid";
376
    case access_read: return "read";
377
    case access_write: return "write";
378
    case access_exec: return "exec";
379
    case access_io: return "io";
380
    case access_read_write: return "read_write";
381
    case access_read_exec: return "read_exec";
382
    case access_write_exec: return "write_exec";
383
    case access_read_write_exec: return "read_write_exec";
384
    case access_read_io: return "read_io";
385
    case access_write_io: return "write_io";
386
    case access_read_write_io: return "read_write_io";
387
    case access_exec_io: return "exec_io";
388
    case access_read_exec_io: return "read_exec_io";
389
    case access_write_exec_io: return "write_exec_io";
390
    case access_read_write_exec_io: return "read_write_exec_io";
391
    default:
392
      {
393
        static char str[10];
394
        sprintf (str, "(%ld)", (long) access);
395
        return str;
396
      }
397
    }
398
}
399
 
400
const char *
401
transfer_to_str (unsigned transfer)
402
{
403
  switch (transfer)
404
    {
405
    case read_transfer: return "read";
406
    case write_transfer: return "write";
407
    default: return "(error)";
408
    }
409
}
410
 
411
 

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