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[/] [openrisc/] [trunk/] [gnu-stable/] [gdb-7.2/] [sim/] [common/] [sim-io.c] - Blame information for rev 859

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1 330 jeremybenn 
/* The common simulator framework for GDB, the GNU Debugger.
2 
 
3 
   Copyright 2002, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
4 
 
5 
   Contributed by Andrew Cagney and Red Hat.
6 
 
7 
   This file is part of GDB.
8 
 
9 
   This program is free software; you can redistribute it and/or modify
10 
   it under the terms of the GNU General Public License as published by
11 
   the Free Software Foundation; either version 3 of the License, or
12 
   (at your option) any later version.
13 
 
14 
   This program is distributed in the hope that it will be useful,
15 
   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.
18 
 
19 
   You should have received a copy of the GNU General Public License
20 
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
21 
 
22 
 
23 
#include "sim-main.h"
24 
#include "sim-io.h"
25 
#include "targ-vals.h"
26 
 
27 
#include <errno.h>
28 
#if HAVE_FCNTL_H
29 
#include <fcntl.h>
30 
#endif
31 
 
32 
#if HAVE_UNISTD_H
33 
#include <unistd.h>
34 
#endif
35 
 
36 
/* Define the rate at which the simulator should poll the host
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   for a quit. */
38 
#ifndef POLL_QUIT_INTERVAL
39 
#define POLL_QUIT_INTERVAL 0x10
40 
#endif
41 
 
42 
static int poll_quit_count = POLL_QUIT_INTERVAL;
43 
 
44 
/* See the file include/callbacks.h for a description */
45 
 
46 
 
47 
int
48 
sim_io_init(SIM_DESC sd)
49 
{
50 
  return STATE_CALLBACK (sd)->init (STATE_CALLBACK (sd));
51 
}
52 
 
53 
 
54 
int
55 
sim_io_shutdown(SIM_DESC sd)
56 
{
57 
  return STATE_CALLBACK (sd)->shutdown (STATE_CALLBACK (sd));
58 
}
59 
 
60 
 
61 
int
62 
sim_io_unlink(SIM_DESC sd,
63 
              const char *f1)
64 
{
65 
  return STATE_CALLBACK (sd)->unlink (STATE_CALLBACK (sd), f1);
66 
}
67 
 
68 
 
69 
long
70 
sim_io_time(SIM_DESC sd,
71 
            long *t)
72 
{
73 
  return STATE_CALLBACK (sd)->time (STATE_CALLBACK (sd), t);
74 
}
75 
 
76 
 
77 
int
78 
sim_io_system(SIM_DESC sd, const char *s)
79 
{
80 
  return STATE_CALLBACK (sd)->system (STATE_CALLBACK (sd), s);
81 
}
82 
 
83 
 
84 
int
85 
sim_io_rename(SIM_DESC sd,
86 
              const char *f1,
87 
              const char *f2)
88 
{
89 
  return STATE_CALLBACK (sd)->rename (STATE_CALLBACK (sd), f1, f2);
90 
}
91 
 
92 
 
93 
int
94 
sim_io_write_stdout(SIM_DESC sd,
95 
                    const char *buf,
96 
                    int len)
97 
{
98 
  switch (CURRENT_STDIO) {
99 
  case DO_USE_STDIO:
100 
    return STATE_CALLBACK (sd)->write_stdout (STATE_CALLBACK (sd), buf, len);
101 
    break;
102 
  case DONT_USE_STDIO:
103 
    return STATE_CALLBACK (sd)->write (STATE_CALLBACK (sd), 1, buf, len);
104 
    break;
105 
  default:
106 
    sim_io_error (sd, "sim_io_write_stdout: unaccounted switch\n");
107 
    break;
108 
  }
109 
  return 0;
110 
}
111 
 
112 
 
113 
void
114 
sim_io_flush_stdout(SIM_DESC sd)
115 
{
116 
  switch (CURRENT_STDIO) {
117 
  case DO_USE_STDIO:
118 
    STATE_CALLBACK (sd)->flush_stdout (STATE_CALLBACK (sd));
119 
    break;
120 
  case DONT_USE_STDIO:
121 
    break;
122 
  default:
123 
    sim_io_error (sd, "sim_io_flush_stdout: unaccounted switch\n");
124 
    break;
125 
  }
126 
}
127 
 
128 
 
129 
int
130 
sim_io_write_stderr(SIM_DESC sd,
131 
                    const char *buf,
132 
                    int len)
133 
{
134 
  switch (CURRENT_STDIO) {
135 
  case DO_USE_STDIO:
136 
    return STATE_CALLBACK (sd)->write_stderr (STATE_CALLBACK (sd), buf, len);
137 
    break;
138 
  case DONT_USE_STDIO:
139 
    return STATE_CALLBACK (sd)->write (STATE_CALLBACK (sd), 2, buf, len);
140 
    break;
141 
  default:
142 
    sim_io_error (sd, "sim_io_write_stderr: unaccounted switch\n");
143 
    break;
144 
  }
145 
  return 0;
146 
}
147 
 
148 
 
149 
void
150 
sim_io_flush_stderr(SIM_DESC sd)
151 
{
152 
  switch (CURRENT_STDIO) {
153 
  case DO_USE_STDIO:
154 
    STATE_CALLBACK (sd)->flush_stderr (STATE_CALLBACK (sd));
155 
    break;
156 
  case DONT_USE_STDIO:
157 
    break;
158 
  default:
159 
    sim_io_error (sd, "sim_io_flush_stderr: unaccounted switch\n");
160 
    break;
161 
  }
162 
}
163 
 
164 
 
165 
int
166 
sim_io_write(SIM_DESC sd,
167 
             int fd,
168 
             const char *buf,
169 
             int len)
170 
{
171 
  return STATE_CALLBACK (sd)->write (STATE_CALLBACK (sd), fd, buf, len);
172 
}
173 
 
174 
 
175 
int
176 
sim_io_read_stdin(SIM_DESC sd,
177 
                  char *buf,
178 
                  int len)
179 
{
180 
  switch (CURRENT_STDIO) {
181 
  case DO_USE_STDIO:
182 
    return STATE_CALLBACK (sd)->read_stdin (STATE_CALLBACK (sd), buf, len);
183 
    break;
184 
  case DONT_USE_STDIO:
185 
    return STATE_CALLBACK (sd)->read (STATE_CALLBACK (sd), 0, buf, len);
186 
    break;
187 
  default:
188 
    sim_io_error (sd, "sim_io_read_stdin: unaccounted switch\n");
189 
    break;
190 
  }
191 
  return 0;
192 
}
193 
 
194 
 
195 
int
196 
sim_io_read(SIM_DESC sd, int fd,
197 
            char *buf,
198 
            int len)
199 
{
200 
  return STATE_CALLBACK (sd)->read (STATE_CALLBACK (sd), fd, buf, len);
201 
}
202 
 
203 
 
204 
int
205 
sim_io_open(SIM_DESC sd,
206 
            const char *name,
207 
            int flags)
208 
{
209 
  return STATE_CALLBACK (sd)->open (STATE_CALLBACK (sd), name, flags);
210 
}
211 
 
212 
 
213 
int
214 
sim_io_lseek(SIM_DESC sd,
215 
             int fd,
216 
             long off,
217 
             int way)
218 
{
219 
  return STATE_CALLBACK (sd)->lseek (STATE_CALLBACK (sd), fd, off, way);
220 
}
221 
 
222 
 
223 
int
224 
sim_io_isatty(SIM_DESC sd,
225 
              int fd)
226 
{
227 
  return STATE_CALLBACK (sd)->isatty (STATE_CALLBACK (sd), fd);
228 
}
229 
 
230 
 
231 
int
232 
sim_io_get_errno(SIM_DESC sd)
233 
{
234 
  return STATE_CALLBACK (sd)->get_errno (STATE_CALLBACK (sd));
235 
}
236 
 
237 
 
238 
int
239 
sim_io_close(SIM_DESC sd,
240 
             int fd)
241 
{
242 
  return STATE_CALLBACK (sd)->close (STATE_CALLBACK (sd), fd);
243 
}
244 
 
245 
 
246 
void
247 
sim_io_printf(SIM_DESC sd,
248 
              const char *fmt,
249 
              ...)
250 
{
251 
  va_list ap;
252 
  va_start(ap, fmt);
253 
  STATE_CALLBACK (sd)->vprintf_filtered (STATE_CALLBACK (sd), fmt, ap);
254 
  va_end(ap);
255 
}
256 
 
257 
 
258 
void
259 
sim_io_vprintf(SIM_DESC sd,
260 
               const char *fmt,
261 
               va_list ap)
262 
{
263 
  STATE_CALLBACK (sd)->vprintf_filtered (STATE_CALLBACK (sd), fmt, ap);
264 
}
265 
 
266 
 
267 
void
268 
sim_io_eprintf(SIM_DESC sd,
269 
              const char *fmt,
270 
              ...)
271 
{
272 
  va_list ap;
273 
  va_start(ap, fmt);
274 
  STATE_CALLBACK (sd)->evprintf_filtered (STATE_CALLBACK (sd), fmt, ap);
275 
  va_end(ap);
276 
}
277 
 
278 
 
279 
void
280 
sim_io_evprintf(SIM_DESC sd,
281 
                const char *fmt,
282 
                va_list ap)
283 
{
284 
  STATE_CALLBACK (sd)->evprintf_filtered (STATE_CALLBACK (sd), fmt, ap);
285 
}
286 
 
287 
 
288 
void
289 
sim_io_error(SIM_DESC sd,
290 
             const char *fmt,
291 
             ...)
292 
{
293 
  if (sd == NULL || STATE_CALLBACK (sd) == NULL) {
294 
    va_list ap;
295 
    va_start(ap, fmt);
296 
    vfprintf (stderr, fmt, ap);
297 
    va_end(ap);
298 
    fprintf (stderr, "\n");
299 
    abort ();
300 
  }
301 
  else {
302 
    va_list ap;
303 
    va_start(ap, fmt);
304 
    STATE_CALLBACK (sd)->evprintf_filtered (STATE_CALLBACK (sd), fmt, ap);
305 
    va_end(ap);
306 
    STATE_CALLBACK (sd)->error (STATE_CALLBACK (sd), "");
307 
  }
308 
}
309 
 
310 
 
311 
void
312 
sim_io_poll_quit(SIM_DESC sd)
313 
{
314 
  if (STATE_CALLBACK (sd)->poll_quit != NULL && poll_quit_count-- < 0)
315 
    {
316 
      poll_quit_count = POLL_QUIT_INTERVAL;
317 
      if (STATE_CALLBACK (sd)->poll_quit (STATE_CALLBACK (sd)))
318 
        sim_stop (sd);
319 
    }
320 
}
321 
 
322 
 
323 
/* Based on gdb-4.17/sim/ppc/main.c:sim_io_read_stdin().
324 
 
325 
   FIXME: Should not be calling fcntl() or grubbing around inside of
326 
   ->fdmap and ->errno.
327 
 
328 
   FIXME: Some completly new mechanism for handling the general
329 
   problem of asynchronous IO is needed.
330 
 
331 
   FIXME: This function does not supress the echoing (ECHO) of input.
332 
   Consequently polled input is always displayed.
333 
 
334 
   FIXME: This function does not perform uncooked reads.
335 
   Consequently, data will not be read until an EOLN character has
336 
   been entered. A cntrl-d may force the early termination of a line */
337 
 
338 
 
339 
int
340 
sim_io_poll_read (SIM_DESC sd,
341 
                  int sim_io_fd,
342 
                  char *buf,
343 
                  int sizeof_buf)
344 
{
345 
#if defined(O_NDELAY) && defined(F_GETFL) && defined(F_SETFL)
346 
  int fd = STATE_CALLBACK (sd)->fdmap[sim_io_fd];
347 
  int flags;
348 
  int status;
349 
  int nr_read;
350 
  int result;
351 
  STATE_CALLBACK (sd)->last_errno = 0;
352 
  /* get the old status */
353 
  flags = fcntl (fd, F_GETFL, 0);
354 
  if (flags == -1)
355 
    {
356 
      perror ("sim_io_poll_read");
357 
      return 0;
358 
    }
359 
  /* temp, disable blocking IO */
360 
  status = fcntl (fd, F_SETFL, flags | O_NDELAY);
361 
  if (status == -1)
362 
    {
363 
      perror ("sim_io_read_stdin");
364 
      return 0;
365 
    }
366 
  /* try for input */
367 
  nr_read = read (fd, buf, sizeof_buf);
368 
  if (nr_read >= 0)
369 
    {
370 
      /* printf ("<nr-read=%d>\n", nr_read); */
371 
      result = nr_read;
372 
    }
373 
  else
374 
    { /* nr_read < 0 */
375 
      result = -1;
376 
      STATE_CALLBACK (sd)->last_errno = errno;
377 
    }
378 
  /* return to regular vewing */
379 
  status = fcntl (fd, F_SETFL, flags);
380 
  if (status == -1)
381 
    {
382 
      perror ("sim_io_read_stdin");
383 
      /* return 0; */
384 
    }
385 
  return result;
386 
#else
387 
  return sim_io_read (sd, sim_io_fd, buf, sizeof_buf);
388 
#endif
389 
}

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