summaryrefslogtreecommitdiff
path: root/sim/common/sim-io.c
blob: 05ba0180ffd8cb8450cc7d4e781ecb695bace863 (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
/* The common simulator framework for GDB, the GNU Debugger.

   Copyright 2002-2020 Free Software Foundation, Inc.

   Contributed by Andrew Cagney and Red Hat.

   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 3 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, see <http://www.gnu.org/licenses/>.  */


#include "sim-main.h"
#include "sim-io.h"
#include "targ-vals.h"

#include <errno.h>
#if HAVE_FCNTL_H
#include <fcntl.h>
#endif

#if HAVE_UNISTD_H
#include <unistd.h>
#endif

/* Define the rate at which the simulator should poll the host
   for a quit. */
#ifndef POLL_QUIT_INTERVAL
#define POLL_QUIT_INTERVAL 0x10
#endif

static int poll_quit_count = POLL_QUIT_INTERVAL;

/* See the file include/callbacks.h for a description */


int
sim_io_init (SIM_DESC sd)
{
  return STATE_CALLBACK (sd)->init (STATE_CALLBACK (sd));
}


int
sim_io_shutdown (SIM_DESC sd)
{
  return STATE_CALLBACK (sd)->shutdown (STATE_CALLBACK (sd));
}


int
sim_io_unlink (SIM_DESC sd,
	       const char *f1)
{
  return STATE_CALLBACK (sd)->unlink (STATE_CALLBACK (sd), f1);
}


long
sim_io_time (SIM_DESC sd,
	     long *t)
{
  return STATE_CALLBACK (sd)->time (STATE_CALLBACK (sd), t);
}


int
sim_io_system (SIM_DESC sd, const char *s)
{
  return STATE_CALLBACK (sd)->system (STATE_CALLBACK (sd), s);
}


int
sim_io_rename (SIM_DESC sd,
	       const char *f1,
	       const char *f2)
{
  return STATE_CALLBACK (sd)->rename (STATE_CALLBACK (sd), f1, f2);
}


int
sim_io_write_stdout (SIM_DESC sd,
		     const char *buf,
		     int len)
{
  switch (CURRENT_STDIO) {
  case DO_USE_STDIO:
    return STATE_CALLBACK (sd)->write_stdout (STATE_CALLBACK (sd), buf, len);
    break;
  case DONT_USE_STDIO:
    return STATE_CALLBACK (sd)->write (STATE_CALLBACK (sd), 1, buf, len);
    break;
  default:
    sim_io_error (sd, "sim_io_write_stdout: unaccounted switch\n");
    break;
  }
  return 0;
}


void
sim_io_flush_stdout (SIM_DESC sd)
{
  switch (CURRENT_STDIO) {
  case DO_USE_STDIO:
    STATE_CALLBACK (sd)->flush_stdout (STATE_CALLBACK (sd));
    break;
  case DONT_USE_STDIO:
    break;
  default:
    sim_io_error (sd, "sim_io_flush_stdout: unaccounted switch\n");
    break;
  }
}


int
sim_io_write_stderr (SIM_DESC sd,
		     const char *buf,
		     int len)
{
  switch (CURRENT_STDIO) {
  case DO_USE_STDIO:
    return STATE_CALLBACK (sd)->write_stderr (STATE_CALLBACK (sd), buf, len);
    break;
  case DONT_USE_STDIO:
    return STATE_CALLBACK (sd)->write (STATE_CALLBACK (sd), 2, buf, len);
    break;
  default:
    sim_io_error (sd, "sim_io_write_stderr: unaccounted switch\n");
    break;
  }
  return 0;
}


void
sim_io_flush_stderr (SIM_DESC sd)
{
  switch (CURRENT_STDIO) {
  case DO_USE_STDIO:
    STATE_CALLBACK (sd)->flush_stderr (STATE_CALLBACK (sd));
    break;
  case DONT_USE_STDIO:
    break;
  default:
    sim_io_error (sd, "sim_io_flush_stderr: unaccounted switch\n");
    break;
  }
}


int
sim_io_write (SIM_DESC sd,
	      int fd,
	      const char *buf,
	      int len)
{
  return STATE_CALLBACK (sd)->write (STATE_CALLBACK (sd), fd, buf, len);
}


int
sim_io_read_stdin (SIM_DESC sd,
		   char *buf,
		   int len)
{
  switch (CURRENT_STDIO) {
  case DO_USE_STDIO:
    return STATE_CALLBACK (sd)->read_stdin (STATE_CALLBACK (sd), buf, len);
    break;
  case DONT_USE_STDIO:
    return STATE_CALLBACK (sd)->read (STATE_CALLBACK (sd), 0, buf, len);
    break;
  default:
    sim_io_error (sd, "sim_io_read_stdin: unaccounted switch\n");
    break;
  }
  return 0;
}


int
sim_io_read (SIM_DESC sd, int fd,
	     char *buf,
	     int len)
{
  return STATE_CALLBACK (sd)->read (STATE_CALLBACK (sd), fd, buf, len);
}


int
sim_io_open (SIM_DESC sd,
	     const char *name,
	     int flags)
{
  return STATE_CALLBACK (sd)->open (STATE_CALLBACK (sd), name, flags);
}


int
sim_io_lseek (SIM_DESC sd,
	      int fd,
	      long off,
	      int way)
{
  return STATE_CALLBACK (sd)->lseek (STATE_CALLBACK (sd), fd, off, way);
}


int
sim_io_isatty (SIM_DESC sd,
	       int fd)
{
  return STATE_CALLBACK (sd)->isatty (STATE_CALLBACK (sd), fd);
}


int
sim_io_get_errno (SIM_DESC sd)
{
  return STATE_CALLBACK (sd)->get_errno (STATE_CALLBACK (sd));
}


int
sim_io_close (SIM_DESC sd,
	      int fd)
{
  return STATE_CALLBACK (sd)->close (STATE_CALLBACK (sd), fd);
}


void
sim_io_printf (SIM_DESC sd,
	       const char *fmt,
	       ...)
{
  va_list ap;
  va_start (ap, fmt);
  STATE_CALLBACK (sd)->vprintf_filtered (STATE_CALLBACK (sd), fmt, ap);
  va_end (ap);
}


void
sim_io_vprintf (SIM_DESC sd,
		const char *fmt,
		va_list ap)
{
  STATE_CALLBACK (sd)->vprintf_filtered (STATE_CALLBACK (sd), fmt, ap);
}


void
sim_io_eprintf (SIM_DESC sd,
	       const char *fmt,
	       ...)
{
  va_list ap;
  va_start (ap, fmt);
  STATE_CALLBACK (sd)->evprintf_filtered (STATE_CALLBACK (sd), fmt, ap);
  va_end (ap);
}


void
sim_io_evprintf (SIM_DESC sd,
		 const char *fmt,
		 va_list ap)
{
  STATE_CALLBACK (sd)->evprintf_filtered (STATE_CALLBACK (sd), fmt, ap);
}


void
sim_io_error (SIM_DESC sd,
	      const char *fmt,
	      ...)
{
  if (sd == NULL || STATE_CALLBACK (sd) == NULL) {
    va_list ap;
    va_start (ap, fmt);
    vfprintf (stderr, fmt, ap);
    va_end (ap);
    fprintf (stderr, "\n");
    abort ();
  }
  else {
    va_list ap;
    va_start (ap, fmt);
    STATE_CALLBACK (sd)->evprintf_filtered (STATE_CALLBACK (sd), fmt, ap);
    va_end (ap);
    STATE_CALLBACK (sd)->error (STATE_CALLBACK (sd), "");
  }
}


void
sim_io_poll_quit (SIM_DESC sd)
{
  if (STATE_CALLBACK (sd)->poll_quit != NULL && poll_quit_count-- < 0)
    {
      poll_quit_count = POLL_QUIT_INTERVAL;
      if (STATE_CALLBACK (sd)->poll_quit (STATE_CALLBACK (sd)))
	sim_stop (sd);
    }
}


/* Based on gdb-4.17/sim/ppc/main.c:sim_io_read_stdin().

   FIXME: Should not be calling fcntl() or grubbing around inside of
   ->fdmap and ->errno.

   FIXME: Some completly new mechanism for handling the general
   problem of asynchronous IO is needed.

   FIXME: This function does not supress the echoing (ECHO) of input.
   Consequently polled input is always displayed.

   FIXME: This function does not perform uncooked reads.
   Consequently, data will not be read until an EOLN character has
   been entered. A cntrl-d may force the early termination of a line */


int
sim_io_poll_read (SIM_DESC sd,
		  int sim_io_fd,
		  char *buf,
		  int sizeof_buf)
{
#if defined(O_NDELAY) && defined(F_GETFL) && defined(F_SETFL)
  int fd = STATE_CALLBACK (sd)->fdmap[sim_io_fd];
  int flags;
  int status;
  int nr_read;
  int result;
  STATE_CALLBACK (sd)->last_errno = 0;
  /* get the old status */
  flags = fcntl (fd, F_GETFL, 0);
  if (flags == -1)
    {
      perror ("sim_io_poll_read");
      return 0;
    }
  /* temp, disable blocking IO */
  status = fcntl (fd, F_SETFL, flags | O_NDELAY);
  if (status == -1)
    {
      perror ("sim_io_read_stdin");
      return 0;
    }
  /* try for input */
  nr_read = read (fd, buf, sizeof_buf);
  if (nr_read >= 0)
    {
      /* printf ("<nr-read=%d>\n", nr_read); */
      result = nr_read;
    }
  else
    { /* nr_read < 0 */
      result = -1;
      STATE_CALLBACK (sd)->last_errno = errno;
    }
  /* return to regular vewing */
  status = fcntl (fd, F_SETFL, flags);
  if (status == -1)
    {
      perror ("sim_io_read_stdin");
      /* return 0; */
    }
  return result;
#else
  return sim_io_read (sd, sim_io_fd, buf, sizeof_buf);
#endif
}

int
sim_io_stat (SIM_DESC sd, const char *path, struct stat *buf)
{
  return STATE_CALLBACK (sd)->to_stat (STATE_CALLBACK (sd), path, buf);
}

int
sim_io_fstat (SIM_DESC sd, int fd, struct stat *buf)
{
  return STATE_CALLBACK (sd)->to_fstat (STATE_CALLBACK (sd), fd, buf);
}