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b85e4829 AC |
1 | /* The common simulator framework for GDB, the GNU Debugger. |
2 | ||
6aba47ca | 3 | Copyright 2002, 2007 Free Software Foundation, Inc. |
b85e4829 AC |
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 | |
4744ac1b | 11 | the Free Software Foundation; either version 3 of the License, or |
b85e4829 AC |
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 | |
4744ac1b | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
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 | ||
7a292a7a SS |
36 | /* Define the rate at which the simulator should poll the host |
37 | 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; | |
c906108c SS |
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 | { | |
7a292a7a SS |
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 | } | |
c906108c SS |
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 | } |