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b85e4829 AC |
1 | /* The common simulator framework for GDB, the GNU Debugger. |
2 | ||
3 | Copyright 2002 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 2 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 | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | 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, write to the Free Software | |
21 | Foundation, Inc., 59 Temple Place - Suite 330, | |
22 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
23 | |
24 | ||
25 | #include "sim-main.h" | |
26 | #include "sim-io.h" | |
27 | #include "targ-vals.h" | |
28 | ||
29 | #include <errno.h> | |
30 | #if HAVE_FCNTL_H | |
31 | #include <fcntl.h> | |
32 | #endif | |
33 | ||
34 | #if HAVE_UNISTD_H | |
35 | #include <unistd.h> | |
36 | #endif | |
37 | ||
7a292a7a SS |
38 | /* Define the rate at which the simulator should poll the host |
39 | for a quit. */ | |
40 | #ifndef POLL_QUIT_INTERVAL | |
41 | #define POLL_QUIT_INTERVAL 0x10 | |
42 | #endif | |
43 | ||
44 | static int poll_quit_count = POLL_QUIT_INTERVAL; | |
c906108c SS |
45 | |
46 | /* See the file include/callbacks.h for a description */ | |
47 | ||
48 | ||
49 | int | |
50 | sim_io_init(SIM_DESC sd) | |
51 | { | |
52 | return STATE_CALLBACK (sd)->init (STATE_CALLBACK (sd)); | |
53 | } | |
54 | ||
55 | ||
56 | int | |
57 | sim_io_shutdown(SIM_DESC sd) | |
58 | { | |
59 | return STATE_CALLBACK (sd)->shutdown (STATE_CALLBACK (sd)); | |
60 | } | |
61 | ||
62 | ||
63 | int | |
64 | sim_io_unlink(SIM_DESC sd, | |
65 | const char *f1) | |
66 | { | |
67 | return STATE_CALLBACK (sd)->unlink (STATE_CALLBACK (sd), f1); | |
68 | } | |
69 | ||
70 | ||
71 | long | |
72 | sim_io_time(SIM_DESC sd, | |
73 | long *t) | |
74 | { | |
75 | return STATE_CALLBACK (sd)->time (STATE_CALLBACK (sd), t); | |
76 | } | |
77 | ||
78 | ||
79 | int | |
80 | sim_io_system(SIM_DESC sd, const char *s) | |
81 | { | |
82 | return STATE_CALLBACK (sd)->system (STATE_CALLBACK (sd), s); | |
83 | } | |
84 | ||
85 | ||
86 | int | |
87 | sim_io_rename(SIM_DESC sd, | |
88 | const char *f1, | |
89 | const char *f2) | |
90 | { | |
91 | return STATE_CALLBACK (sd)->rename (STATE_CALLBACK (sd), f1, f2); | |
92 | } | |
93 | ||
94 | ||
95 | int | |
96 | sim_io_write_stdout(SIM_DESC sd, | |
97 | const char *buf, | |
98 | int len) | |
99 | { | |
100 | switch (CURRENT_STDIO) { | |
101 | case DO_USE_STDIO: | |
102 | return STATE_CALLBACK (sd)->write_stdout (STATE_CALLBACK (sd), buf, len); | |
103 | break; | |
104 | case DONT_USE_STDIO: | |
105 | return STATE_CALLBACK (sd)->write (STATE_CALLBACK (sd), 1, buf, len); | |
106 | break; | |
107 | default: | |
108 | sim_io_error (sd, "sim_io_write_stdout: unaccounted switch\n"); | |
109 | break; | |
110 | } | |
111 | return 0; | |
112 | } | |
113 | ||
114 | ||
115 | void | |
116 | sim_io_flush_stdout(SIM_DESC sd) | |
117 | { | |
118 | switch (CURRENT_STDIO) { | |
119 | case DO_USE_STDIO: | |
120 | STATE_CALLBACK (sd)->flush_stdout (STATE_CALLBACK (sd)); | |
121 | break; | |
122 | case DONT_USE_STDIO: | |
123 | break; | |
124 | default: | |
125 | sim_io_error (sd, "sim_io_flush_stdout: unaccounted switch\n"); | |
126 | break; | |
127 | } | |
128 | } | |
129 | ||
130 | ||
131 | int | |
132 | sim_io_write_stderr(SIM_DESC sd, | |
133 | const char *buf, | |
134 | int len) | |
135 | { | |
136 | switch (CURRENT_STDIO) { | |
137 | case DO_USE_STDIO: | |
138 | return STATE_CALLBACK (sd)->write_stderr (STATE_CALLBACK (sd), buf, len); | |
139 | break; | |
140 | case DONT_USE_STDIO: | |
141 | return STATE_CALLBACK (sd)->write (STATE_CALLBACK (sd), 2, buf, len); | |
142 | break; | |
143 | default: | |
144 | sim_io_error (sd, "sim_io_write_stderr: unaccounted switch\n"); | |
145 | break; | |
146 | } | |
147 | return 0; | |
148 | } | |
149 | ||
150 | ||
151 | void | |
152 | sim_io_flush_stderr(SIM_DESC sd) | |
153 | { | |
154 | switch (CURRENT_STDIO) { | |
155 | case DO_USE_STDIO: | |
156 | STATE_CALLBACK (sd)->flush_stderr (STATE_CALLBACK (sd)); | |
157 | break; | |
158 | case DONT_USE_STDIO: | |
159 | break; | |
160 | default: | |
161 | sim_io_error (sd, "sim_io_flush_stderr: unaccounted switch\n"); | |
162 | break; | |
163 | } | |
164 | } | |
165 | ||
166 | ||
167 | int | |
168 | sim_io_write(SIM_DESC sd, | |
169 | int fd, | |
170 | const char *buf, | |
171 | int len) | |
172 | { | |
173 | return STATE_CALLBACK (sd)->write (STATE_CALLBACK (sd), fd, buf, len); | |
174 | } | |
175 | ||
176 | ||
177 | int | |
178 | sim_io_read_stdin(SIM_DESC sd, | |
179 | char *buf, | |
180 | int len) | |
181 | { | |
182 | switch (CURRENT_STDIO) { | |
183 | case DO_USE_STDIO: | |
184 | return STATE_CALLBACK (sd)->read_stdin (STATE_CALLBACK (sd), buf, len); | |
185 | break; | |
186 | case DONT_USE_STDIO: | |
187 | return STATE_CALLBACK (sd)->read (STATE_CALLBACK (sd), 0, buf, len); | |
188 | break; | |
189 | default: | |
190 | sim_io_error (sd, "sim_io_read_stdin: unaccounted switch\n"); | |
191 | break; | |
192 | } | |
193 | return 0; | |
194 | } | |
195 | ||
196 | ||
197 | int | |
198 | sim_io_read(SIM_DESC sd, int fd, | |
199 | char *buf, | |
200 | int len) | |
201 | { | |
202 | return STATE_CALLBACK (sd)->read (STATE_CALLBACK (sd), fd, buf, len); | |
203 | } | |
204 | ||
205 | ||
206 | int | |
207 | sim_io_open(SIM_DESC sd, | |
208 | const char *name, | |
209 | int flags) | |
210 | { | |
211 | return STATE_CALLBACK (sd)->open (STATE_CALLBACK (sd), name, flags); | |
212 | } | |
213 | ||
214 | ||
215 | int | |
216 | sim_io_lseek(SIM_DESC sd, | |
217 | int fd, | |
218 | long off, | |
219 | int way) | |
220 | { | |
221 | return STATE_CALLBACK (sd)->lseek (STATE_CALLBACK (sd), fd, off, way); | |
222 | } | |
223 | ||
224 | ||
225 | int | |
226 | sim_io_isatty(SIM_DESC sd, | |
227 | int fd) | |
228 | { | |
229 | return STATE_CALLBACK (sd)->isatty (STATE_CALLBACK (sd), fd); | |
230 | } | |
231 | ||
232 | ||
233 | int | |
234 | sim_io_get_errno(SIM_DESC sd) | |
235 | { | |
236 | return STATE_CALLBACK (sd)->get_errno (STATE_CALLBACK (sd)); | |
237 | } | |
238 | ||
239 | ||
240 | int | |
241 | sim_io_close(SIM_DESC sd, | |
242 | int fd) | |
243 | { | |
244 | return STATE_CALLBACK (sd)->close (STATE_CALLBACK (sd), fd); | |
245 | } | |
246 | ||
247 | ||
248 | void | |
249 | sim_io_printf(SIM_DESC sd, | |
250 | const char *fmt, | |
251 | ...) | |
252 | { | |
253 | va_list ap; | |
254 | va_start(ap, fmt); | |
255 | STATE_CALLBACK (sd)->vprintf_filtered (STATE_CALLBACK (sd), fmt, ap); | |
256 | va_end(ap); | |
257 | } | |
258 | ||
259 | ||
260 | void | |
261 | sim_io_vprintf(SIM_DESC sd, | |
262 | const char *fmt, | |
263 | va_list ap) | |
264 | { | |
265 | STATE_CALLBACK (sd)->vprintf_filtered (STATE_CALLBACK (sd), fmt, ap); | |
266 | } | |
267 | ||
268 | ||
269 | void | |
270 | sim_io_eprintf(SIM_DESC sd, | |
271 | const char *fmt, | |
272 | ...) | |
273 | { | |
274 | va_list ap; | |
275 | va_start(ap, fmt); | |
276 | STATE_CALLBACK (sd)->evprintf_filtered (STATE_CALLBACK (sd), fmt, ap); | |
277 | va_end(ap); | |
278 | } | |
279 | ||
280 | ||
281 | void | |
282 | sim_io_evprintf(SIM_DESC sd, | |
283 | const char *fmt, | |
284 | va_list ap) | |
285 | { | |
286 | STATE_CALLBACK (sd)->evprintf_filtered (STATE_CALLBACK (sd), fmt, ap); | |
287 | } | |
288 | ||
289 | ||
290 | void | |
291 | sim_io_error(SIM_DESC sd, | |
292 | const char *fmt, | |
293 | ...) | |
294 | { | |
295 | if (sd == NULL || STATE_CALLBACK (sd) == NULL) { | |
296 | va_list ap; | |
297 | va_start(ap, fmt); | |
298 | vfprintf (stderr, fmt, ap); | |
299 | va_end(ap); | |
300 | fprintf (stderr, "\n"); | |
301 | abort (); | |
302 | } | |
303 | else { | |
304 | va_list ap; | |
305 | va_start(ap, fmt); | |
306 | STATE_CALLBACK (sd)->evprintf_filtered (STATE_CALLBACK (sd), fmt, ap); | |
307 | va_end(ap); | |
308 | STATE_CALLBACK (sd)->error (STATE_CALLBACK (sd), ""); | |
309 | } | |
310 | } | |
311 | ||
312 | ||
313 | void | |
314 | sim_io_poll_quit(SIM_DESC sd) | |
315 | { | |
7a292a7a SS |
316 | if (STATE_CALLBACK (sd)->poll_quit != NULL && poll_quit_count-- < 0) |
317 | { | |
318 | poll_quit_count = POLL_QUIT_INTERVAL; | |
319 | if (STATE_CALLBACK (sd)->poll_quit (STATE_CALLBACK (sd))) | |
320 | sim_stop (sd); | |
321 | } | |
c906108c SS |
322 | } |
323 | ||
324 | ||
325 | /* Based on gdb-4.17/sim/ppc/main.c:sim_io_read_stdin(). | |
326 | ||
327 | FIXME: Should not be calling fcntl() or grubbing around inside of | |
328 | ->fdmap and ->errno. | |
329 | ||
330 | FIXME: Some completly new mechanism for handling the general | |
331 | problem of asynchronous IO is needed. | |
332 | ||
333 | FIXME: This function does not supress the echoing (ECHO) of input. | |
334 | Consequently polled input is always displayed. | |
335 | ||
336 | FIXME: This function does not perform uncooked reads. | |
337 | Consequently, data will not be read until an EOLN character has | |
338 | been entered. A cntrl-d may force the early termination of a line */ | |
339 | ||
340 | ||
341 | int | |
342 | sim_io_poll_read (SIM_DESC sd, | |
343 | int sim_io_fd, | |
344 | char *buf, | |
345 | int sizeof_buf) | |
346 | { | |
347 | #if defined(O_NDELAY) && defined(F_GETFL) && defined(F_SETFL) | |
348 | int fd = STATE_CALLBACK (sd)->fdmap[sim_io_fd]; | |
349 | int flags; | |
350 | int status; | |
351 | int nr_read; | |
352 | int result; | |
353 | STATE_CALLBACK (sd)->last_errno = 0; | |
354 | /* get the old status */ | |
355 | flags = fcntl (fd, F_GETFL, 0); | |
356 | if (flags == -1) | |
357 | { | |
358 | perror ("sim_io_poll_read"); | |
359 | return 0; | |
360 | } | |
361 | /* temp, disable blocking IO */ | |
362 | status = fcntl (fd, F_SETFL, flags | O_NDELAY); | |
363 | if (status == -1) | |
364 | { | |
365 | perror ("sim_io_read_stdin"); | |
366 | return 0; | |
367 | } | |
368 | /* try for input */ | |
369 | nr_read = read (fd, buf, sizeof_buf); | |
370 | if (nr_read >= 0) | |
371 | { | |
372 | /* printf ("<nr-read=%d>\n", nr_read); */ | |
373 | result = nr_read; | |
374 | } | |
375 | else | |
376 | { /* nr_read < 0 */ | |
377 | result = -1; | |
378 | STATE_CALLBACK (sd)->last_errno = errno; | |
379 | } | |
380 | /* return to regular vewing */ | |
381 | status = fcntl (fd, F_SETFL, flags); | |
382 | if (status == -1) | |
383 | { | |
384 | perror ("sim_io_read_stdin"); | |
385 | /* return 0; */ | |
386 | } | |
387 | return result; | |
388 | #else | |
389 | return sim_io_read (sd, sim_io_fd, buf, sizeof_buf); | |
390 | #endif | |
391 | } |