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b85e4829 AC |
1 | /* The common simulator framework for GDB, the GNU Debugger. |
2 | ||
3666a048 | 3 | Copyright 2002-2021 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 | ||
b760fb3a SM |
36 | #include <stdlib.h> |
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 | |
34b47c38 | 50 | sim_io_init (SIM_DESC sd) |
c906108c SS |
51 | { |
52 | return STATE_CALLBACK (sd)->init (STATE_CALLBACK (sd)); | |
53 | } | |
54 | ||
55 | ||
56 | int | |
34b47c38 | 57 | sim_io_shutdown (SIM_DESC sd) |
c906108c SS |
58 | { |
59 | return STATE_CALLBACK (sd)->shutdown (STATE_CALLBACK (sd)); | |
60 | } | |
61 | ||
62 | ||
63 | int | |
34b47c38 MF |
64 | sim_io_unlink (SIM_DESC sd, |
65 | const char *f1) | |
c906108c SS |
66 | { |
67 | return STATE_CALLBACK (sd)->unlink (STATE_CALLBACK (sd), f1); | |
68 | } | |
69 | ||
70 | ||
00330cd1 MF |
71 | int64_t |
72 | sim_io_time (SIM_DESC sd) | |
c906108c | 73 | { |
00330cd1 | 74 | return STATE_CALLBACK (sd)->time (STATE_CALLBACK (sd)); |
c906108c SS |
75 | } |
76 | ||
77 | ||
78 | int | |
34b47c38 | 79 | sim_io_system (SIM_DESC sd, const char *s) |
c906108c SS |
80 | { |
81 | return STATE_CALLBACK (sd)->system (STATE_CALLBACK (sd), s); | |
82 | } | |
83 | ||
84 | ||
85 | int | |
34b47c38 MF |
86 | sim_io_rename (SIM_DESC sd, |
87 | const char *f1, | |
88 | const char *f2) | |
c906108c SS |
89 | { |
90 | return STATE_CALLBACK (sd)->rename (STATE_CALLBACK (sd), f1, f2); | |
91 | } | |
92 | ||
93 | ||
94 | int | |
34b47c38 MF |
95 | sim_io_write_stdout (SIM_DESC sd, |
96 | const char *buf, | |
97 | int len) | |
c906108c SS |
98 | { |
99 | switch (CURRENT_STDIO) { | |
100 | case DO_USE_STDIO: | |
101 | return STATE_CALLBACK (sd)->write_stdout (STATE_CALLBACK (sd), buf, len); | |
102 | break; | |
103 | case DONT_USE_STDIO: | |
104 | return STATE_CALLBACK (sd)->write (STATE_CALLBACK (sd), 1, buf, len); | |
105 | break; | |
106 | default: | |
107 | sim_io_error (sd, "sim_io_write_stdout: unaccounted switch\n"); | |
108 | break; | |
109 | } | |
110 | return 0; | |
111 | } | |
112 | ||
113 | ||
114 | void | |
34b47c38 | 115 | sim_io_flush_stdout (SIM_DESC sd) |
c906108c SS |
116 | { |
117 | switch (CURRENT_STDIO) { | |
118 | case DO_USE_STDIO: | |
119 | STATE_CALLBACK (sd)->flush_stdout (STATE_CALLBACK (sd)); | |
120 | break; | |
121 | case DONT_USE_STDIO: | |
122 | break; | |
123 | default: | |
124 | sim_io_error (sd, "sim_io_flush_stdout: unaccounted switch\n"); | |
125 | break; | |
126 | } | |
127 | } | |
128 | ||
129 | ||
130 | int | |
34b47c38 MF |
131 | sim_io_write_stderr (SIM_DESC sd, |
132 | const char *buf, | |
133 | int len) | |
c906108c SS |
134 | { |
135 | switch (CURRENT_STDIO) { | |
136 | case DO_USE_STDIO: | |
137 | return STATE_CALLBACK (sd)->write_stderr (STATE_CALLBACK (sd), buf, len); | |
138 | break; | |
139 | case DONT_USE_STDIO: | |
140 | return STATE_CALLBACK (sd)->write (STATE_CALLBACK (sd), 2, buf, len); | |
141 | break; | |
142 | default: | |
143 | sim_io_error (sd, "sim_io_write_stderr: unaccounted switch\n"); | |
144 | break; | |
145 | } | |
146 | return 0; | |
147 | } | |
148 | ||
149 | ||
150 | void | |
34b47c38 | 151 | sim_io_flush_stderr (SIM_DESC sd) |
c906108c SS |
152 | { |
153 | switch (CURRENT_STDIO) { | |
154 | case DO_USE_STDIO: | |
155 | STATE_CALLBACK (sd)->flush_stderr (STATE_CALLBACK (sd)); | |
156 | break; | |
157 | case DONT_USE_STDIO: | |
158 | break; | |
159 | default: | |
160 | sim_io_error (sd, "sim_io_flush_stderr: unaccounted switch\n"); | |
161 | break; | |
162 | } | |
163 | } | |
164 | ||
165 | ||
166 | int | |
34b47c38 MF |
167 | sim_io_write (SIM_DESC sd, |
168 | int fd, | |
169 | const char *buf, | |
170 | int len) | |
c906108c SS |
171 | { |
172 | return STATE_CALLBACK (sd)->write (STATE_CALLBACK (sd), fd, buf, len); | |
173 | } | |
174 | ||
175 | ||
176 | int | |
34b47c38 MF |
177 | sim_io_read_stdin (SIM_DESC sd, |
178 | char *buf, | |
179 | int len) | |
c906108c SS |
180 | { |
181 | switch (CURRENT_STDIO) { | |
182 | case DO_USE_STDIO: | |
183 | return STATE_CALLBACK (sd)->read_stdin (STATE_CALLBACK (sd), buf, len); | |
184 | break; | |
185 | case DONT_USE_STDIO: | |
186 | return STATE_CALLBACK (sd)->read (STATE_CALLBACK (sd), 0, buf, len); | |
187 | break; | |
188 | default: | |
189 | sim_io_error (sd, "sim_io_read_stdin: unaccounted switch\n"); | |
190 | break; | |
191 | } | |
192 | return 0; | |
193 | } | |
194 | ||
195 | ||
196 | int | |
34b47c38 MF |
197 | sim_io_read (SIM_DESC sd, int fd, |
198 | char *buf, | |
199 | int len) | |
c906108c SS |
200 | { |
201 | return STATE_CALLBACK (sd)->read (STATE_CALLBACK (sd), fd, buf, len); | |
202 | } | |
203 | ||
204 | ||
205 | int | |
34b47c38 MF |
206 | sim_io_open (SIM_DESC sd, |
207 | const char *name, | |
208 | int flags) | |
c906108c SS |
209 | { |
210 | return STATE_CALLBACK (sd)->open (STATE_CALLBACK (sd), name, flags); | |
211 | } | |
212 | ||
213 | ||
2fbe9507 | 214 | int64_t |
34b47c38 MF |
215 | sim_io_lseek (SIM_DESC sd, |
216 | int fd, | |
2fbe9507 | 217 | int64_t off, |
34b47c38 | 218 | int way) |
c906108c SS |
219 | { |
220 | return STATE_CALLBACK (sd)->lseek (STATE_CALLBACK (sd), fd, off, way); | |
221 | } | |
222 | ||
223 | ||
224 | int | |
34b47c38 MF |
225 | sim_io_isatty (SIM_DESC sd, |
226 | int fd) | |
c906108c SS |
227 | { |
228 | return STATE_CALLBACK (sd)->isatty (STATE_CALLBACK (sd), fd); | |
229 | } | |
230 | ||
231 | ||
232 | int | |
34b47c38 | 233 | sim_io_get_errno (SIM_DESC sd) |
c906108c SS |
234 | { |
235 | return STATE_CALLBACK (sd)->get_errno (STATE_CALLBACK (sd)); | |
236 | } | |
237 | ||
238 | ||
239 | int | |
34b47c38 MF |
240 | sim_io_close (SIM_DESC sd, |
241 | int fd) | |
c906108c SS |
242 | { |
243 | return STATE_CALLBACK (sd)->close (STATE_CALLBACK (sd), fd); | |
244 | } | |
245 | ||
246 | ||
247 | void | |
34b47c38 MF |
248 | sim_io_printf (SIM_DESC sd, |
249 | const char *fmt, | |
250 | ...) | |
c906108c SS |
251 | { |
252 | va_list ap; | |
34b47c38 | 253 | va_start (ap, fmt); |
c906108c | 254 | STATE_CALLBACK (sd)->vprintf_filtered (STATE_CALLBACK (sd), fmt, ap); |
34b47c38 | 255 | va_end (ap); |
c906108c SS |
256 | } |
257 | ||
258 | ||
259 | void | |
34b47c38 MF |
260 | sim_io_vprintf (SIM_DESC sd, |
261 | const char *fmt, | |
262 | va_list ap) | |
c906108c SS |
263 | { |
264 | STATE_CALLBACK (sd)->vprintf_filtered (STATE_CALLBACK (sd), fmt, ap); | |
265 | } | |
266 | ||
267 | ||
268 | void | |
34b47c38 MF |
269 | sim_io_eprintf (SIM_DESC sd, |
270 | const char *fmt, | |
271 | ...) | |
c906108c SS |
272 | { |
273 | va_list ap; | |
34b47c38 | 274 | va_start (ap, fmt); |
c906108c | 275 | STATE_CALLBACK (sd)->evprintf_filtered (STATE_CALLBACK (sd), fmt, ap); |
34b47c38 | 276 | va_end (ap); |
c906108c SS |
277 | } |
278 | ||
279 | ||
280 | void | |
34b47c38 MF |
281 | sim_io_evprintf (SIM_DESC sd, |
282 | const char *fmt, | |
283 | va_list ap) | |
c906108c SS |
284 | { |
285 | STATE_CALLBACK (sd)->evprintf_filtered (STATE_CALLBACK (sd), fmt, ap); | |
286 | } | |
287 | ||
288 | ||
289 | void | |
34b47c38 MF |
290 | sim_io_error (SIM_DESC sd, |
291 | const char *fmt, | |
292 | ...) | |
c906108c SS |
293 | { |
294 | if (sd == NULL || STATE_CALLBACK (sd) == NULL) { | |
295 | va_list ap; | |
34b47c38 | 296 | va_start (ap, fmt); |
c906108c | 297 | vfprintf (stderr, fmt, ap); |
34b47c38 | 298 | va_end (ap); |
c906108c SS |
299 | fprintf (stderr, "\n"); |
300 | abort (); | |
301 | } | |
302 | else { | |
303 | va_list ap; | |
34b47c38 | 304 | va_start (ap, fmt); |
c906108c | 305 | STATE_CALLBACK (sd)->evprintf_filtered (STATE_CALLBACK (sd), fmt, ap); |
34b47c38 | 306 | va_end (ap); |
c906108c SS |
307 | STATE_CALLBACK (sd)->error (STATE_CALLBACK (sd), ""); |
308 | } | |
309 | } | |
310 | ||
311 | ||
312 | void | |
34b47c38 | 313 | sim_io_poll_quit (SIM_DESC sd) |
c906108c | 314 | { |
7a292a7a SS |
315 | if (STATE_CALLBACK (sd)->poll_quit != NULL && poll_quit_count-- < 0) |
316 | { | |
317 | poll_quit_count = POLL_QUIT_INTERVAL; | |
318 | if (STATE_CALLBACK (sd)->poll_quit (STATE_CALLBACK (sd))) | |
319 | sim_stop (sd); | |
320 | } | |
c906108c SS |
321 | } |
322 | ||
323 | ||
324 | /* Based on gdb-4.17/sim/ppc/main.c:sim_io_read_stdin(). | |
325 | ||
326 | FIXME: Should not be calling fcntl() or grubbing around inside of | |
327 | ->fdmap and ->errno. | |
328 | ||
329 | FIXME: Some completly new mechanism for handling the general | |
330 | problem of asynchronous IO is needed. | |
331 | ||
332 | FIXME: This function does not supress the echoing (ECHO) of input. | |
333 | Consequently polled input is always displayed. | |
334 | ||
335 | FIXME: This function does not perform uncooked reads. | |
336 | Consequently, data will not be read until an EOLN character has | |
337 | been entered. A cntrl-d may force the early termination of a line */ | |
338 | ||
339 | ||
340 | int | |
341 | sim_io_poll_read (SIM_DESC sd, | |
342 | int sim_io_fd, | |
343 | char *buf, | |
344 | int sizeof_buf) | |
345 | { | |
346 | #if defined(O_NDELAY) && defined(F_GETFL) && defined(F_SETFL) | |
347 | int fd = STATE_CALLBACK (sd)->fdmap[sim_io_fd]; | |
348 | int flags; | |
349 | int status; | |
350 | int nr_read; | |
351 | int result; | |
352 | STATE_CALLBACK (sd)->last_errno = 0; | |
353 | /* get the old status */ | |
354 | flags = fcntl (fd, F_GETFL, 0); | |
355 | if (flags == -1) | |
356 | { | |
357 | perror ("sim_io_poll_read"); | |
358 | return 0; | |
359 | } | |
360 | /* temp, disable blocking IO */ | |
361 | status = fcntl (fd, F_SETFL, flags | O_NDELAY); | |
362 | if (status == -1) | |
363 | { | |
364 | perror ("sim_io_read_stdin"); | |
365 | return 0; | |
366 | } | |
367 | /* try for input */ | |
368 | nr_read = read (fd, buf, sizeof_buf); | |
369 | if (nr_read >= 0) | |
370 | { | |
371 | /* printf ("<nr-read=%d>\n", nr_read); */ | |
372 | result = nr_read; | |
373 | } | |
374 | else | |
375 | { /* nr_read < 0 */ | |
376 | result = -1; | |
377 | STATE_CALLBACK (sd)->last_errno = errno; | |
378 | } | |
379 | /* return to regular vewing */ | |
380 | status = fcntl (fd, F_SETFL, flags); | |
381 | if (status == -1) | |
382 | { | |
383 | perror ("sim_io_read_stdin"); | |
384 | /* return 0; */ | |
385 | } | |
386 | return result; | |
387 | #else | |
388 | return sim_io_read (sd, sim_io_fd, buf, sizeof_buf); | |
389 | #endif | |
390 | } | |
165b70ea KB |
391 | |
392 | int | |
393 | sim_io_stat (SIM_DESC sd, const char *path, struct stat *buf) | |
394 | { | |
2d7bb758 | 395 | return STATE_CALLBACK (sd)->to_stat (STATE_CALLBACK (sd), path, buf); |
165b70ea KB |
396 | } |
397 | ||
398 | int | |
399 | sim_io_fstat (SIM_DESC sd, int fd, struct stat *buf) | |
400 | { | |
2d7bb758 | 401 | return STATE_CALLBACK (sd)->to_fstat (STATE_CALLBACK (sd), fd, buf); |
165b70ea | 402 | } |