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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-6.8/] [sim/] [ppc/] [sim_calls.c] - Blame information for rev 24

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1 24 jeremybenn
/*  This file is part of the program psim.
2
 
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    Copyright 1994, 1995, 1996, 1998, 2003 Andrew Cagney
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5
    This program is free software; you can redistribute it and/or modify
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    it under the terms of the GNU General Public License as published by
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    the Free Software Foundation; either version 2 of the License, or
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    (at your option) any later version.
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    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.
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15
    You should have received a copy of the GNU General Public License
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    along with this program; if not, write to the Free Software
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    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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    */
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21
 
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#include <signal.h> /* FIXME - should be machine dependant version */
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#include <stdarg.h>
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#include <ctype.h>
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#include "psim.h"
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#include "options.h"
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#undef printf_filtered /* blow away the mapping */
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#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
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#endif
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#include "libiberty.h"
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#include "bfd.h"
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#include "gdb/callback.h"
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#include "gdb/remote-sim.h"
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#include "gdb/signals.h"
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/* Define the rate at which the simulator should poll the host
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   for a quit. */
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#ifndef POLL_QUIT_INTERVAL
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#define POLL_QUIT_INTERVAL 0x20
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#endif
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static int poll_quit_count = POLL_QUIT_INTERVAL;
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/* Structures used by the simulator, for gdb just have static structures */
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psim *simulator;
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static device *root_device;
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static host_callback *callbacks;
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63
SIM_DESC
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sim_open (SIM_OPEN_KIND kind,
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          host_callback *callback,
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          struct bfd *abfd,
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          char **argv)
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{
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  callbacks = callback;
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71
  /* Note: The simulation is not created by sim_open() because
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     complete information is not yet available */
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  /* trace the call */
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  TRACE(trace_gdb, ("sim_open called\n"));
75
 
76
  if (root_device != NULL)
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    sim_io_printf_filtered("Warning - re-open of simulator leaks memory\n");
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  root_device = psim_tree();
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  simulator = NULL;
80
 
81
  psim_options(root_device, argv + 1);
82
 
83
  if (ppc_trace[trace_opts])
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    print_options ();
85
 
86
  /* fudge our descriptor for now */
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  return (SIM_DESC) 1;
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}
89
 
90
 
91
void
92
sim_close (SIM_DESC sd, int quitting)
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{
94
  TRACE(trace_gdb, ("sim_close(quitting=%d) called\n", quitting));
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  if (ppc_trace[trace_print_info] && simulator != NULL)
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    psim_print_info (simulator, ppc_trace[trace_print_info]);
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}
98
 
99
 
100
SIM_RC
101
sim_load (SIM_DESC sd, char *prog, bfd *abfd, int from_tty)
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{
103
  TRACE(trace_gdb, ("sim_load(prog=%s, from_tty=%d) called\n",
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                    prog, from_tty));
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  ASSERT(prog != NULL);
106
 
107
  /* create the simulator */
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  TRACE(trace_gdb, ("sim_load() - first time, create the simulator\n"));
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  simulator = psim_create(prog, root_device);
110
 
111
  /* bring in all the data section */
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  psim_init(simulator);
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114
  /* get the start address */
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  if (abfd == NULL)
116
    {
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      abfd = bfd_openr (prog, 0);
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      if (abfd == NULL)
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        error ("psim: can't open \"%s\": %s\n",
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               prog, bfd_errmsg (bfd_get_error ()));
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      if (!bfd_check_format (abfd, bfd_object))
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        {
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          const char *errmsg = bfd_errmsg (bfd_get_error ());
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          bfd_close (abfd);
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          error ("psim: \"%s\" is not an object file: %s\n",
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                 prog, errmsg);
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        }
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      bfd_close (abfd);
129
    }
130
 
131
  return SIM_RC_OK;
132
}
133
 
134
 
135
int
136
sim_read (SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length)
137
{
138
  int result = psim_read_memory(simulator, MAX_NR_PROCESSORS,
139
                                buf, mem, length);
140
  TRACE(trace_gdb, ("sim_read(mem=0x%lx, buf=0x%lx, length=%d) = %d\n",
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                    (long)mem, (long)buf, length, result));
142
  return result;
143
}
144
 
145
 
146
int
147
sim_write (SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length)
148
{
149
  int result = psim_write_memory(simulator, MAX_NR_PROCESSORS,
150
                                 buf, mem, length,
151
                                 1/*violate_ro*/);
152
  TRACE(trace_gdb, ("sim_write(mem=0x%lx, buf=0x%lx, length=%d) = %d\n",
153
                    (long)mem, (long)buf, length, result));
154
  return result;
155
}
156
 
157
void
158
sim_info (SIM_DESC sd, int verbose)
159
{
160
  TRACE(trace_gdb, ("sim_info(verbose=%d) called\n", verbose));
161
  psim_print_info (simulator, verbose);
162
}
163
 
164
 
165
SIM_RC
166
sim_create_inferior (SIM_DESC sd,
167
                     struct bfd *abfd,
168
                     char **argv,
169
                     char **envp)
170
{
171
  unsigned_word entry_point;
172
  TRACE(trace_gdb, ("sim_create_inferior(start_address=0x%x, ...)\n",
173
                    entry_point));
174
 
175
  if (simulator == NULL)
176
    error ("No program loaded");
177
 
178
  if (abfd != NULL)
179
    entry_point = bfd_get_start_address (abfd);
180
  else
181
    entry_point = 0xfff00000; /* ??? */
182
 
183
  psim_init(simulator);
184
  psim_stack(simulator, argv, envp);
185
 
186
  ASSERT (psim_write_register(simulator, -1 /* all start at same PC */,
187
                              &entry_point, "pc", cooked_transfer) > 0);
188
  return SIM_RC_OK;
189
}
190
 
191
 
192
void
193
sim_stop_reason (SIM_DESC sd, enum sim_stop *reason, int *sigrc)
194
{
195
  psim_status status = psim_get_status(simulator);
196
 
197
  switch (status.reason) {
198
  case was_continuing:
199
    *reason = sim_stopped;
200
    if (status.signal == 0)
201
      *sigrc = TARGET_SIGNAL_TRAP;
202
    else
203
      *sigrc = status.signal;
204
    break;
205
  case was_trap:
206
    *reason = sim_stopped;
207
    *sigrc = TARGET_SIGNAL_TRAP;
208
    break;
209
  case was_exited:
210
    *reason = sim_exited;
211
    *sigrc = status.signal;
212
    break;
213
  case was_signalled:
214
    *reason = sim_signalled;
215
    *sigrc = status.signal;
216
    break;
217
  }
218
 
219
  TRACE(trace_gdb, ("sim_stop_reason(reason=0x%lx(%ld), sigrc=0x%lx(%ld))\n",
220
                    (long)reason, (long)*reason, (long)sigrc, (long)*sigrc));
221
}
222
 
223
 
224
 
225
/* Run (or resume) the program.  */
226
 
227
int
228
sim_stop (SIM_DESC sd)
229
{
230
  psim_stop (simulator);
231
  return 1;
232
}
233
 
234
void
235
sim_resume (SIM_DESC sd, int step, int siggnal)
236
{
237
  TRACE(trace_gdb, ("sim_resume(step=%d, siggnal=%d)\n",
238
                    step, siggnal));
239
 
240
  if (step)
241
    {
242
      psim_step (simulator);
243
    }
244
  else
245
    {
246
      psim_run (simulator);
247
    }
248
}
249
 
250
void
251
sim_do_command (SIM_DESC sd, char *cmd)
252
{
253
  TRACE(trace_gdb, ("sim_do_commands(cmd=%s) called\n",
254
                    cmd ? cmd : "(null)"));
255
  if (cmd != NULL) {
256
    char **argv = buildargv(cmd);
257
    psim_command(root_device, argv);
258
    freeargv(argv);
259
  }
260
}
261
 
262
 
263
/* Polling, if required */
264
 
265
void
266
sim_io_poll_quit (void)
267
{
268
  if (callbacks->poll_quit != NULL && poll_quit_count-- < 0)
269
    {
270
      poll_quit_count = POLL_QUIT_INTERVAL;
271
      if (callbacks->poll_quit (callbacks))
272
        psim_stop (simulator);
273
    }
274
}
275
 
276
 
277
 
278
/* Map simulator IO operations onto the corresponding GDB I/O
279
   functions.
280
 
281
   NB: Only a limited subset of operations are mapped across.  More
282
   advanced operations (such as dup or write) must either be mapped to
283
   one of the below calls or handled internally */
284
 
285
int
286
sim_io_read_stdin(char *buf,
287
                  int sizeof_buf)
288
{
289
  switch (CURRENT_STDIO) {
290
  case DO_USE_STDIO:
291
    return callbacks->read_stdin(callbacks, buf, sizeof_buf);
292
    break;
293
  case DONT_USE_STDIO:
294
    return callbacks->read(callbacks, 0, buf, sizeof_buf);
295
    break;
296
  default:
297
    error("sim_io_read_stdin: unaccounted switch\n");
298
    break;
299
  }
300
  return 0;
301
}
302
 
303
int
304
sim_io_write_stdout(const char *buf,
305
                    int sizeof_buf)
306
{
307
  switch (CURRENT_STDIO) {
308
  case DO_USE_STDIO:
309
    return callbacks->write_stdout(callbacks, buf, sizeof_buf);
310
    break;
311
  case DONT_USE_STDIO:
312
    return callbacks->write(callbacks, 1, buf, sizeof_buf);
313
    break;
314
  default:
315
    error("sim_io_write_stdout: unaccounted switch\n");
316
    break;
317
  }
318
  return 0;
319
}
320
 
321
int
322
sim_io_write_stderr(const char *buf,
323
                    int sizeof_buf)
324
{
325
  switch (CURRENT_STDIO) {
326
  case DO_USE_STDIO:
327
    /* NB: I think there should be an explicit write_stderr callback */
328
    return callbacks->write(callbacks, 3, buf, sizeof_buf);
329
    break;
330
  case DONT_USE_STDIO:
331
    return callbacks->write(callbacks, 3, buf, sizeof_buf);
332
    break;
333
  default:
334
    error("sim_io_write_stderr: unaccounted switch\n");
335
    break;
336
  }
337
  return 0;
338
}
339
 
340
 
341
void
342
sim_io_printf_filtered(const char *fmt,
343
                       ...)
344
{
345
  char message[1024];
346
  va_list ap;
347
  /* format the message */
348
  va_start(ap, fmt);
349
  vsprintf(message, fmt, ap);
350
  va_end(ap);
351
  /* sanity check */
352
  if (strlen(message) >= sizeof(message))
353
    error("sim_io_printf_filtered: buffer overflow\n");
354
  callbacks->printf_filtered(callbacks, "%s", message);
355
}
356
 
357
void
358
sim_io_flush_stdoutput(void)
359
{
360
  switch (CURRENT_STDIO) {
361
  case DO_USE_STDIO:
362
    callbacks->flush_stdout (callbacks);
363
    break;
364
  case DONT_USE_STDIO:
365
    break;
366
  default:
367
    error("sim_io_read_stdin: unaccounted switch\n");
368
    break;
369
  }
370
}
371
 
372
void
373
sim_io_error (SIM_DESC sd, const char *fmt, ...)
374
{
375
  va_list ap;
376
  va_start(ap, fmt);
377
  callbacks->evprintf_filtered (callbacks, fmt, ap);
378
  va_end(ap);
379
  callbacks->error (callbacks, "");
380
}
381
 
382
/****/
383
 
384
void *
385
zalloc(long size)
386
{
387
  void *memory = (void*)xmalloc(size);
388
  if (memory == NULL)
389
    error("xmalloc failed\n");
390
  memset(memory, 0, size);
391
  return memory;
392
}
393
 
394
void zfree(void *data)
395
{
396
  free(data);
397
}

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