Commit | Line | Data |
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c906108c | 1 | /* Generic remote debugging interface for simulators. |
0a65a603 | 2 | |
ecd75fc8 | 3 | Copyright (C) 1993-2014 Free Software Foundation, Inc. |
0a65a603 | 4 | |
c906108c SS |
5 | Contributed by Cygnus Support. |
6 | Steve Chamberlain (sac@cygnus.com). | |
7 | ||
c5aa993b | 8 | This file is part of GDB. |
c906108c | 9 | |
c5aa993b JM |
10 | This program is free software; you can redistribute it and/or modify |
11 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 12 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 13 | (at your option) any later version. |
c906108c | 14 | |
c5aa993b JM |
15 | This program is distributed in the hope that it will be useful, |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
c906108c | 19 | |
c5aa993b | 20 | You should have received a copy of the GNU General Public License |
a9762ec7 | 21 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
22 | |
23 | #include "defs.h" | |
24 | #include "inferior.h" | |
c906108c | 25 | #include "value.h" |
0e9f083f | 26 | #include <string.h> |
c906108c SS |
27 | #include <ctype.h> |
28 | #include <fcntl.h> | |
29 | #include <signal.h> | |
30 | #include <setjmp.h> | |
31 | #include <errno.h> | |
32 | #include "terminal.h" | |
33 | #include "target.h" | |
34 | #include "gdbcore.h" | |
3c25f8c7 AC |
35 | #include "gdb/callback.h" |
36 | #include "gdb/remote-sim.h" | |
c906108c | 37 | #include "command.h" |
4e052eda | 38 | #include "regcache.h" |
8238d0bf AC |
39 | #include "gdb_assert.h" |
40 | #include "sim-regno.h" | |
a8cf2722 | 41 | #include "arch-utils.h" |
1986bccd | 42 | #include "readline/readline.h" |
9de2bdd7 | 43 | #include "gdbthread.h" |
c906108c SS |
44 | |
45 | /* Prototypes */ | |
46 | ||
a14ed312 | 47 | extern void _initialize_remote_sim (void); |
392a587b | 48 | |
a14ed312 | 49 | static void init_callbacks (void); |
c906108c | 50 | |
a14ed312 | 51 | static void end_callbacks (void); |
c906108c | 52 | |
a14ed312 | 53 | static int gdb_os_write_stdout (host_callback *, const char *, int); |
c906108c | 54 | |
a14ed312 | 55 | static void gdb_os_flush_stdout (host_callback *); |
c906108c | 56 | |
a14ed312 | 57 | static int gdb_os_write_stderr (host_callback *, const char *, int); |
c906108c | 58 | |
a14ed312 | 59 | static void gdb_os_flush_stderr (host_callback *); |
c906108c | 60 | |
a14ed312 | 61 | static int gdb_os_poll_quit (host_callback *); |
c906108c | 62 | |
0df8b418 | 63 | /* printf_filtered is depreciated. */ |
a14ed312 | 64 | static void gdb_os_printf_filtered (host_callback *, const char *, ...); |
c906108c | 65 | |
a14ed312 | 66 | static void gdb_os_vprintf_filtered (host_callback *, const char *, va_list); |
c906108c | 67 | |
a14ed312 | 68 | static void gdb_os_evprintf_filtered (host_callback *, const char *, va_list); |
c906108c | 69 | |
c25c4a8b JK |
70 | static void gdb_os_error (host_callback *, const char *, ...) |
71 | ATTRIBUTE_NORETURN; | |
c906108c | 72 | |
7d85a9c0 | 73 | static void gdbsim_kill (struct target_ops *); |
c906108c | 74 | |
71a9f134 | 75 | static void gdbsim_load (struct target_ops *self, char *prog, int fromtty); |
c906108c | 76 | |
a14ed312 | 77 | static void gdbsim_open (char *args, int from_tty); |
c906108c | 78 | |
de90e03d | 79 | static void gdbsim_close (struct target_ops *self); |
c906108c | 80 | |
8ca5801b JB |
81 | static void gdbsim_detach (struct target_ops *ops, const char *args, |
82 | int from_tty); | |
c906108c | 83 | |
f32dbf8c MM |
84 | static void gdbsim_prepare_to_store (struct target_ops *self, |
85 | struct regcache *regcache); | |
c906108c | 86 | |
a14ed312 | 87 | static void gdbsim_files_info (struct target_ops *target); |
c906108c | 88 | |
3c8b2eda | 89 | static void gdbsim_mourn_inferior (struct target_ops *target); |
c906108c | 90 | |
f9c72d52 | 91 | static void gdbsim_stop (ptid_t ptid); |
c906108c | 92 | |
a14ed312 | 93 | void simulator_command (char *args, int from_tty); |
c906108c SS |
94 | |
95 | /* Naming convention: | |
96 | ||
97 | sim_* are the interface to the simulator (see remote-sim.h). | |
98 | gdbsim_* are stuff which is internal to gdb. */ | |
99 | ||
100 | /* Forward data declarations */ | |
101 | extern struct target_ops gdbsim_ops; | |
102 | ||
db04efe6 KB |
103 | static const struct inferior_data *sim_inferior_data_key; |
104 | ||
105 | /* Simulator-specific, per-inferior state. */ | |
106 | struct sim_inferior_data { | |
107 | /* Flag which indicates whether or not the program has been loaded. */ | |
108 | int program_loaded; | |
109 | ||
110 | /* Simulator descriptor for this inferior. */ | |
111 | SIM_DESC gdbsim_desc; | |
112 | ||
113 | /* This is the ptid we use for this particular simulator instance. Its | |
114 | value is somewhat arbitrary, as the simulator target don't have a | |
115 | notion of tasks or threads, but we need something non-null to place | |
116 | in inferior_ptid. For simulators which permit multiple instances, | |
117 | we also need a unique identifier to use for each inferior. */ | |
118 | ptid_t remote_sim_ptid; | |
119 | ||
120 | /* Signal with which to resume. */ | |
2ea28649 | 121 | enum gdb_signal resume_siggnal; |
db04efe6 KB |
122 | |
123 | /* Flag which indicates whether resume should step or not. */ | |
124 | int resume_step; | |
125 | }; | |
126 | ||
127 | /* Flag indicating the "open" status of this module. It's set to 1 | |
128 | in gdbsim_open() and 0 in gdbsim_close(). */ | |
129 | static int gdbsim_is_open = 0; | |
130 | ||
131 | /* Value of the next pid to allocate for an inferior. As indicated | |
132 | elsewhere, its initial value is somewhat arbitrary; it's critical | |
133 | though that it's not zero or negative. */ | |
134 | static int next_pid; | |
135 | #define INITIAL_PID 42000 | |
136 | ||
137 | /* Argument list to pass to sim_open(). It is allocated in gdbsim_open() | |
138 | and deallocated in gdbsim_close(). The lifetime needs to extend beyond | |
139 | the call to gdbsim_open() due to the fact that other sim instances other | |
140 | than the first will be allocated after the gdbsim_open() call. */ | |
141 | static char **sim_argv = NULL; | |
142 | ||
143 | /* OS-level callback functions for write, flush, etc. */ | |
144 | static host_callback gdb_callback; | |
145 | static int callbacks_initialized = 0; | |
146 | ||
147 | /* Callback for iterate_over_inferiors. It checks to see if the sim | |
148 | descriptor passed via ARG is the same as that for the inferior | |
149 | designated by INF. Return true if so; false otherwise. */ | |
150 | ||
151 | static int | |
152 | check_for_duplicate_sim_descriptor (struct inferior *inf, void *arg) | |
153 | { | |
154 | struct sim_inferior_data *sim_data; | |
155 | SIM_DESC new_sim_desc = arg; | |
156 | ||
157 | sim_data = inferior_data (inf, sim_inferior_data_key); | |
158 | ||
159 | return (sim_data != NULL && sim_data->gdbsim_desc == new_sim_desc); | |
160 | } | |
161 | ||
162 | /* Flags indicating whether or not a sim instance is needed. One of these | |
163 | flags should be passed to get_sim_inferior_data(). */ | |
164 | ||
165 | enum {SIM_INSTANCE_NOT_NEEDED = 0, SIM_INSTANCE_NEEDED = 1}; | |
166 | ||
167 | /* Obtain pointer to per-inferior simulator data, allocating it if necessary. | |
168 | Attempt to open the sim if SIM_INSTANCE_NEEDED is true. */ | |
169 | ||
170 | static struct sim_inferior_data * | |
171 | get_sim_inferior_data (struct inferior *inf, int sim_instance_needed) | |
172 | { | |
173 | SIM_DESC sim_desc = NULL; | |
174 | struct sim_inferior_data *sim_data | |
175 | = inferior_data (inf, sim_inferior_data_key); | |
176 | ||
177 | /* Try to allocate a new sim instance, if needed. We do this ahead of | |
178 | a potential allocation of a sim_inferior_data struct in order to | |
179 | avoid needlessly allocating that struct in the event that the sim | |
180 | instance allocation fails. */ | |
181 | if (sim_instance_needed == SIM_INSTANCE_NEEDED | |
182 | && (sim_data == NULL || sim_data->gdbsim_desc == NULL)) | |
183 | { | |
184 | struct inferior *idup; | |
185 | sim_desc = sim_open (SIM_OPEN_DEBUG, &gdb_callback, exec_bfd, sim_argv); | |
186 | if (sim_desc == NULL) | |
187 | error (_("Unable to create simulator instance for inferior %d."), | |
188 | inf->num); | |
189 | ||
190 | idup = iterate_over_inferiors (check_for_duplicate_sim_descriptor, | |
191 | sim_desc); | |
192 | if (idup != NULL) | |
193 | { | |
194 | /* We don't close the descriptor due to the fact that it's | |
195 | shared with some other inferior. If we were to close it, | |
196 | that might needlessly muck up the other inferior. Of | |
197 | course, it's possible that the damage has already been | |
198 | done... Note that it *will* ultimately be closed during | |
199 | cleanup of the other inferior. */ | |
200 | sim_desc = NULL; | |
201 | error ( | |
202 | _("Inferior %d and inferior %d would have identical simulator state.\n" | |
203 | "(This simulator does not support the running of more than one inferior.)"), | |
204 | inf->num, idup->num); | |
205 | } | |
206 | } | |
207 | ||
208 | if (sim_data == NULL) | |
209 | { | |
41bf6aca | 210 | sim_data = XCNEW(struct sim_inferior_data); |
db04efe6 KB |
211 | set_inferior_data (inf, sim_inferior_data_key, sim_data); |
212 | ||
213 | /* Allocate a ptid for this inferior. */ | |
214 | sim_data->remote_sim_ptid = ptid_build (next_pid, 0, next_pid); | |
215 | next_pid++; | |
216 | ||
217 | /* Initialize the other instance variables. */ | |
218 | sim_data->program_loaded = 0; | |
219 | sim_data->gdbsim_desc = sim_desc; | |
a493e3e2 | 220 | sim_data->resume_siggnal = GDB_SIGNAL_0; |
db04efe6 KB |
221 | sim_data->resume_step = 0; |
222 | } | |
223 | else if (sim_desc) | |
224 | { | |
225 | /* This handles the case where sim_data was allocated prior to | |
226 | needing a sim instance. */ | |
227 | sim_data->gdbsim_desc = sim_desc; | |
228 | } | |
c906108c | 229 | |
c906108c | 230 | |
db04efe6 KB |
231 | return sim_data; |
232 | } | |
233 | ||
234 | /* Return pointer to per-inferior simulator data using PTID to find the | |
235 | inferior in question. Return NULL when no inferior is found or | |
236 | when ptid has a zero or negative pid component. */ | |
237 | ||
238 | static struct sim_inferior_data * | |
239 | get_sim_inferior_data_by_ptid (ptid_t ptid, int sim_instance_needed) | |
240 | { | |
241 | struct inferior *inf; | |
242 | int pid = ptid_get_pid (ptid); | |
243 | ||
244 | if (pid <= 0) | |
245 | return NULL; | |
246 | ||
247 | inf = find_inferior_pid (pid); | |
248 | ||
249 | if (inf) | |
250 | return get_sim_inferior_data (inf, sim_instance_needed); | |
251 | else | |
252 | return NULL; | |
253 | } | |
254 | ||
255 | /* Free the per-inferior simulator data. */ | |
256 | ||
257 | static void | |
258 | sim_inferior_data_cleanup (struct inferior *inf, void *data) | |
259 | { | |
260 | struct sim_inferior_data *sim_data = data; | |
261 | ||
262 | if (sim_data != NULL) | |
263 | { | |
264 | if (sim_data->gdbsim_desc) | |
265 | { | |
266 | sim_close (sim_data->gdbsim_desc, 0); | |
267 | sim_data->gdbsim_desc = NULL; | |
268 | } | |
269 | xfree (sim_data); | |
270 | } | |
271 | } | |
9de2bdd7 | 272 | |
c906108c | 273 | static void |
146ec4db | 274 | dump_mem (const gdb_byte *buf, int len) |
c906108c | 275 | { |
1385f66c | 276 | fputs_unfiltered ("\t", gdb_stdlog); |
3d468296 AB |
277 | |
278 | if (len == 8 || len == 4) | |
c906108c | 279 | { |
3d468296 | 280 | uint32_t l[2]; |
123f5f96 | 281 | |
3d468296 | 282 | memcpy (l, buf, len); |
1385f66c | 283 | fprintf_unfiltered (gdb_stdlog, "0x%08x", l[0]); |
3d468296 | 284 | if (len == 8) |
1385f66c | 285 | fprintf_unfiltered (gdb_stdlog, " 0x%08x", l[1]); |
3d468296 AB |
286 | } |
287 | else | |
288 | { | |
289 | int i; | |
123f5f96 | 290 | |
3d468296 | 291 | for (i = 0; i < len; i++) |
1385f66c | 292 | fprintf_unfiltered (gdb_stdlog, "0x%02x ", buf[i]); |
c906108c | 293 | } |
3d468296 | 294 | |
1385f66c | 295 | fputs_unfiltered ("\n", gdb_stdlog); |
c906108c SS |
296 | } |
297 | ||
c906108c SS |
298 | /* Initialize gdb_callback. */ |
299 | ||
300 | static void | |
fba45db2 | 301 | init_callbacks (void) |
c906108c | 302 | { |
c5aa993b | 303 | if (!callbacks_initialized) |
c906108c SS |
304 | { |
305 | gdb_callback = default_callback; | |
306 | gdb_callback.init (&gdb_callback); | |
307 | gdb_callback.write_stdout = gdb_os_write_stdout; | |
308 | gdb_callback.flush_stdout = gdb_os_flush_stdout; | |
309 | gdb_callback.write_stderr = gdb_os_write_stderr; | |
310 | gdb_callback.flush_stderr = gdb_os_flush_stderr; | |
311 | gdb_callback.printf_filtered = gdb_os_printf_filtered; | |
312 | gdb_callback.vprintf_filtered = gdb_os_vprintf_filtered; | |
313 | gdb_callback.evprintf_filtered = gdb_os_evprintf_filtered; | |
314 | gdb_callback.error = gdb_os_error; | |
315 | gdb_callback.poll_quit = gdb_os_poll_quit; | |
316 | gdb_callback.magic = HOST_CALLBACK_MAGIC; | |
317 | callbacks_initialized = 1; | |
318 | } | |
319 | } | |
320 | ||
321 | /* Release callbacks (free resources used by them). */ | |
322 | ||
323 | static void | |
fba45db2 | 324 | end_callbacks (void) |
c906108c SS |
325 | { |
326 | if (callbacks_initialized) | |
327 | { | |
328 | gdb_callback.shutdown (&gdb_callback); | |
329 | callbacks_initialized = 0; | |
330 | } | |
331 | } | |
332 | ||
333 | /* GDB version of os_write_stdout callback. */ | |
334 | ||
c5aa993b | 335 | static int |
fba45db2 | 336 | gdb_os_write_stdout (host_callback *p, const char *buf, int len) |
c906108c SS |
337 | { |
338 | int i; | |
339 | char b[2]; | |
340 | ||
d9fcf2fb | 341 | ui_file_write (gdb_stdtarg, buf, len); |
c906108c SS |
342 | return len; |
343 | } | |
344 | ||
345 | /* GDB version of os_flush_stdout callback. */ | |
346 | ||
347 | static void | |
fba45db2 | 348 | gdb_os_flush_stdout (host_callback *p) |
c906108c | 349 | { |
4ce44c66 | 350 | gdb_flush (gdb_stdtarg); |
c906108c SS |
351 | } |
352 | ||
353 | /* GDB version of os_write_stderr callback. */ | |
354 | ||
c5aa993b | 355 | static int |
fba45db2 | 356 | gdb_os_write_stderr (host_callback *p, const char *buf, int len) |
c906108c SS |
357 | { |
358 | int i; | |
359 | char b[2]; | |
360 | ||
c5aa993b | 361 | for (i = 0; i < len; i++) |
c906108c SS |
362 | { |
363 | b[0] = buf[i]; | |
364 | b[1] = 0; | |
22e8e3c7 | 365 | fputs_unfiltered (b, gdb_stdtargerr); |
c906108c SS |
366 | } |
367 | return len; | |
368 | } | |
369 | ||
370 | /* GDB version of os_flush_stderr callback. */ | |
371 | ||
372 | static void | |
fba45db2 | 373 | gdb_os_flush_stderr (host_callback *p) |
c906108c | 374 | { |
22e8e3c7 | 375 | gdb_flush (gdb_stdtargerr); |
c906108c SS |
376 | } |
377 | ||
378 | /* GDB version of printf_filtered callback. */ | |
379 | ||
c906108c | 380 | static void |
c5aa993b | 381 | gdb_os_printf_filtered (host_callback * p, const char *format,...) |
c906108c SS |
382 | { |
383 | va_list args; | |
c906108c | 384 | |
123f5f96 | 385 | va_start (args, format); |
c906108c | 386 | vfprintf_filtered (gdb_stdout, format, args); |
c906108c SS |
387 | va_end (args); |
388 | } | |
389 | ||
390 | /* GDB version of error vprintf_filtered. */ | |
391 | ||
c906108c | 392 | static void |
c5aa993b | 393 | gdb_os_vprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c SS |
394 | { |
395 | vfprintf_filtered (gdb_stdout, format, ap); | |
396 | } | |
397 | ||
398 | /* GDB version of error evprintf_filtered. */ | |
399 | ||
c906108c | 400 | static void |
c5aa993b | 401 | gdb_os_evprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c SS |
402 | { |
403 | vfprintf_filtered (gdb_stderr, format, ap); | |
404 | } | |
405 | ||
406 | /* GDB version of error callback. */ | |
407 | ||
c906108c | 408 | static void |
58d4abe1 | 409 | gdb_os_error (host_callback * p, const char *format, ...) |
c906108c | 410 | { |
58d4abe1 | 411 | va_list args; |
123f5f96 | 412 | |
58d4abe1 PA |
413 | va_start (args, format); |
414 | verror (format, args); | |
415 | va_end (args); | |
c906108c SS |
416 | } |
417 | ||
8238d0bf | 418 | int |
e7faf938 | 419 | one2one_register_sim_regno (struct gdbarch *gdbarch, int regnum) |
8238d0bf AC |
420 | { |
421 | /* Only makes sense to supply raw registers. */ | |
e7faf938 | 422 | gdb_assert (regnum >= 0 && regnum < gdbarch_num_regs (gdbarch)); |
8238d0bf AC |
423 | return regnum; |
424 | } | |
425 | ||
c906108c | 426 | static void |
28439f5e PA |
427 | gdbsim_fetch_register (struct target_ops *ops, |
428 | struct regcache *regcache, int regno) | |
c906108c | 429 | { |
40a6adc1 | 430 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
db04efe6 KB |
431 | struct sim_inferior_data *sim_data |
432 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NEEDED); | |
123f5f96 | 433 | |
c5aa993b | 434 | if (regno == -1) |
c906108c | 435 | { |
40a6adc1 | 436 | for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++) |
28439f5e | 437 | gdbsim_fetch_register (ops, regcache, regno); |
8238d0bf | 438 | return; |
c906108c | 439 | } |
8238d0bf | 440 | |
40a6adc1 | 441 | switch (gdbarch_register_sim_regno (gdbarch, regno)) |
c906108c | 442 | { |
8238d0bf AC |
443 | case LEGACY_SIM_REGNO_IGNORE: |
444 | break; | |
445 | case SIM_REGNO_DOES_NOT_EXIST: | |
446 | { | |
447 | /* For moment treat a `does not exist' register the same way | |
448 | as an ``unavailable'' register. */ | |
e362b510 | 449 | gdb_byte buf[MAX_REGISTER_SIZE]; |
8238d0bf | 450 | int nr_bytes; |
123f5f96 | 451 | |
d9d9c31f | 452 | memset (buf, 0, MAX_REGISTER_SIZE); |
56be3814 | 453 | regcache_raw_supply (regcache, regno, buf); |
8238d0bf AC |
454 | break; |
455 | } | |
56be3814 | 456 | |
8238d0bf AC |
457 | default: |
458 | { | |
459 | static int warn_user = 1; | |
e362b510 | 460 | gdb_byte buf[MAX_REGISTER_SIZE]; |
8238d0bf | 461 | int nr_bytes; |
123f5f96 | 462 | |
40a6adc1 | 463 | gdb_assert (regno >= 0 && regno < gdbarch_num_regs (gdbarch)); |
d9d9c31f | 464 | memset (buf, 0, MAX_REGISTER_SIZE); |
db04efe6 | 465 | nr_bytes = sim_fetch_register (sim_data->gdbsim_desc, |
474c1661 | 466 | gdbarch_register_sim_regno |
40a6adc1 | 467 | (gdbarch, regno), |
474c1661 | 468 | buf, |
40a6adc1 MD |
469 | register_size (gdbarch, regno)); |
470 | if (nr_bytes > 0 | |
471 | && nr_bytes != register_size (gdbarch, regno) && warn_user) | |
8238d0bf AC |
472 | { |
473 | fprintf_unfiltered (gdb_stderr, | |
0df8b418 MS |
474 | "Size of register %s (%d/%d) " |
475 | "incorrect (%d instead of %d))", | |
40a6adc1 | 476 | gdbarch_register_name (gdbarch, regno), |
474c1661 UW |
477 | regno, |
478 | gdbarch_register_sim_regno | |
40a6adc1 MD |
479 | (gdbarch, regno), |
480 | nr_bytes, register_size (gdbarch, regno)); | |
8238d0bf AC |
481 | warn_user = 0; |
482 | } | |
483 | /* FIXME: cagney/2002-05-27: Should check `nr_bytes == 0' | |
278a7cf7 | 484 | indicating that GDB and the SIM have different ideas about |
8238d0bf AC |
485 | which registers are fetchable. */ |
486 | /* Else if (nr_bytes < 0): an old simulator, that doesn't | |
487 | think to return the register size. Just assume all is ok. */ | |
56be3814 | 488 | regcache_raw_supply (regcache, regno, buf); |
ea35711c | 489 | if (remote_debug) |
8238d0bf | 490 | { |
1385f66c PA |
491 | fprintf_unfiltered (gdb_stdlog, |
492 | "gdbsim_fetch_register: %d", regno); | |
8238d0bf | 493 | /* FIXME: We could print something more intelligible. */ |
40a6adc1 | 494 | dump_mem (buf, register_size (gdbarch, regno)); |
8238d0bf AC |
495 | } |
496 | break; | |
497 | } | |
c906108c SS |
498 | } |
499 | } | |
500 | ||
501 | ||
502 | static void | |
28439f5e PA |
503 | gdbsim_store_register (struct target_ops *ops, |
504 | struct regcache *regcache, int regno) | |
c906108c | 505 | { |
40a6adc1 | 506 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
db04efe6 KB |
507 | struct sim_inferior_data *sim_data |
508 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NEEDED); | |
509 | ||
c5aa993b | 510 | if (regno == -1) |
c906108c | 511 | { |
40a6adc1 | 512 | for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++) |
28439f5e | 513 | gdbsim_store_register (ops, regcache, regno); |
8238d0bf | 514 | return; |
c906108c | 515 | } |
40a6adc1 | 516 | else if (gdbarch_register_sim_regno (gdbarch, regno) >= 0) |
c906108c | 517 | { |
5fda2332 | 518 | gdb_byte tmp[MAX_REGISTER_SIZE]; |
c906108c | 519 | int nr_bytes; |
123f5f96 | 520 | |
56be3814 | 521 | regcache_cooked_read (regcache, regno, tmp); |
db04efe6 | 522 | nr_bytes = sim_store_register (sim_data->gdbsim_desc, |
474c1661 | 523 | gdbarch_register_sim_regno |
40a6adc1 MD |
524 | (gdbarch, regno), |
525 | tmp, register_size (gdbarch, regno)); | |
526 | if (nr_bytes > 0 && nr_bytes != register_size (gdbarch, regno)) | |
8e65ff28 | 527 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 528 | _("Register size different to expected")); |
dae477fe AB |
529 | if (nr_bytes < 0) |
530 | internal_error (__FILE__, __LINE__, | |
531 | _("Register %d not updated"), regno); | |
532 | if (nr_bytes == 0) | |
533 | warning (_("Register %s not updated"), | |
534 | gdbarch_register_name (gdbarch, regno)); | |
535 | ||
ea35711c | 536 | if (remote_debug) |
c906108c | 537 | { |
1385f66c | 538 | fprintf_unfiltered (gdb_stdlog, "gdbsim_store_register: %d", regno); |
c906108c | 539 | /* FIXME: We could print something more intelligible. */ |
40a6adc1 | 540 | dump_mem (tmp, register_size (gdbarch, regno)); |
c906108c SS |
541 | } |
542 | } | |
543 | } | |
544 | ||
545 | /* Kill the running program. This may involve closing any open files | |
546 | and releasing other resources acquired by the simulated program. */ | |
547 | ||
548 | static void | |
7d85a9c0 | 549 | gdbsim_kill (struct target_ops *ops) |
c906108c | 550 | { |
ea35711c | 551 | if (remote_debug) |
1385f66c | 552 | fprintf_unfiltered (gdb_stdlog, "gdbsim_kill\n"); |
c906108c SS |
553 | |
554 | /* There is no need to `kill' running simulator - the simulator is | |
52bb452f DJ |
555 | not running. Mourning it is enough. */ |
556 | target_mourn_inferior (); | |
c906108c SS |
557 | } |
558 | ||
559 | /* Load an executable file into the target process. This is expected to | |
560 | not only bring new code into the target process, but also to update | |
561 | GDB's symbol tables to match. */ | |
562 | ||
563 | static void | |
71a9f134 | 564 | gdbsim_load (struct target_ops *self, char *args, int fromtty) |
c906108c | 565 | { |
d1a41061 | 566 | char **argv; |
1986bccd | 567 | char *prog; |
db04efe6 KB |
568 | struct sim_inferior_data *sim_data |
569 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NEEDED); | |
1986bccd | 570 | |
d1a41061 PP |
571 | if (args == NULL) |
572 | error_no_arg (_("program to load")); | |
1986bccd | 573 | |
d1a41061 | 574 | argv = gdb_buildargv (args); |
1986bccd AS |
575 | make_cleanup_freeargv (argv); |
576 | ||
577 | prog = tilde_expand (argv[0]); | |
578 | ||
579 | if (argv[1] != NULL) | |
580 | error (_("GDB sim does not yet support a load offset.")); | |
581 | ||
ea35711c | 582 | if (remote_debug) |
1385f66c | 583 | fprintf_unfiltered (gdb_stdlog, "gdbsim_load: prog \"%s\"\n", prog); |
c906108c | 584 | |
c906108c SS |
585 | /* FIXME: We will print two messages on error. |
586 | Need error to either not print anything if passed NULL or need | |
587 | another routine that doesn't take any arguments. */ | |
db04efe6 | 588 | if (sim_load (sim_data->gdbsim_desc, prog, NULL, fromtty) == SIM_RC_FAIL) |
8a3fe4f8 | 589 | error (_("unable to load program")); |
c906108c SS |
590 | |
591 | /* FIXME: If a load command should reset the targets registers then | |
0df8b418 | 592 | a call to sim_create_inferior() should go here. */ |
c906108c | 593 | |
db04efe6 | 594 | sim_data->program_loaded = 1; |
c906108c SS |
595 | } |
596 | ||
597 | ||
39f77062 | 598 | /* Start an inferior process and set inferior_ptid to its pid. |
c906108c SS |
599 | EXEC_FILE is the file to run. |
600 | ARGS is a string containing the arguments to the program. | |
601 | ENV is the environment vector to pass. Errors reported with error(). | |
602 | On VxWorks and various standalone systems, we ignore exec_file. */ | |
603 | /* This is called not only when we first attach, but also when the | |
604 | user types "run" after having attached. */ | |
605 | ||
606 | static void | |
3c8b2eda TJB |
607 | gdbsim_create_inferior (struct target_ops *target, char *exec_file, char *args, |
608 | char **env, int from_tty) | |
c906108c | 609 | { |
db04efe6 KB |
610 | struct sim_inferior_data *sim_data |
611 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NEEDED); | |
c906108c | 612 | int len; |
c5aa993b | 613 | char *arg_buf, **argv; |
c906108c SS |
614 | |
615 | if (exec_file == 0 || exec_bfd == 0) | |
8a3fe4f8 | 616 | warning (_("No executable file specified.")); |
db04efe6 | 617 | if (!sim_data->program_loaded) |
8a3fe4f8 | 618 | warning (_("No program loaded.")); |
c906108c | 619 | |
ea35711c | 620 | if (remote_debug) |
1385f66c PA |
621 | fprintf_unfiltered (gdb_stdlog, |
622 | "gdbsim_create_inferior: exec_file \"%s\", args \"%s\"\n", | |
623 | (exec_file ? exec_file : "(NULL)"), | |
624 | args); | |
c906108c | 625 | |
db04efe6 | 626 | if (ptid_equal (inferior_ptid, sim_data->remote_sim_ptid)) |
7d85a9c0 | 627 | gdbsim_kill (target); |
c906108c SS |
628 | remove_breakpoints (); |
629 | init_wait_for_inferior (); | |
630 | ||
631 | if (exec_file != NULL) | |
632 | { | |
c5aa993b | 633 | len = strlen (exec_file) + 1 + strlen (args) + 1 + /*slop */ 10; |
c906108c SS |
634 | arg_buf = (char *) alloca (len); |
635 | arg_buf[0] = '\0'; | |
636 | strcat (arg_buf, exec_file); | |
637 | strcat (arg_buf, " "); | |
638 | strcat (arg_buf, args); | |
d1a41061 | 639 | argv = gdb_buildargv (arg_buf); |
7a292a7a | 640 | make_cleanup_freeargv (argv); |
c906108c SS |
641 | } |
642 | else | |
643 | argv = NULL; | |
ddd60447 | 644 | |
2a7c8fd5 AB |
645 | if (!have_inferiors ()) |
646 | init_thread_list (); | |
647 | ||
ddd60447 MF |
648 | if (sim_create_inferior (sim_data->gdbsim_desc, exec_bfd, argv, env) |
649 | != SIM_RC_OK) | |
650 | error (_("Unable to create sim inferior.")); | |
c906108c | 651 | |
db04efe6 | 652 | inferior_ptid = sim_data->remote_sim_ptid; |
20176d8f | 653 | inferior_appeared (current_inferior (), ptid_get_pid (inferior_ptid)); |
9de2bdd7 PA |
654 | add_thread_silent (inferior_ptid); |
655 | ||
0df8b418 MS |
656 | insert_breakpoints (); /* Needed to get correct instruction |
657 | in cache. */ | |
c906108c SS |
658 | |
659 | clear_proceed_status (); | |
c906108c SS |
660 | } |
661 | ||
662 | /* The open routine takes the rest of the parameters from the command, | |
663 | and (if successful) pushes a new target onto the stack. | |
664 | Targets should supply this routine, if only to provide an error message. */ | |
0df8b418 | 665 | /* Called when selecting the simulator. E.g. (gdb) target sim name. */ |
c906108c SS |
666 | |
667 | static void | |
fba45db2 | 668 | gdbsim_open (char *args, int from_tty) |
c906108c SS |
669 | { |
670 | int len; | |
671 | char *arg_buf; | |
db04efe6 KB |
672 | struct sim_inferior_data *sim_data; |
673 | SIM_DESC gdbsim_desc; | |
c906108c | 674 | |
ea35711c | 675 | if (remote_debug) |
1385f66c PA |
676 | fprintf_unfiltered (gdb_stdlog, |
677 | "gdbsim_open: args \"%s\"\n", args ? args : "(null)"); | |
c906108c | 678 | |
db04efe6 KB |
679 | /* Ensure that the sim target is not on the target stack. This is |
680 | necessary, because if it is on the target stack, the call to | |
681 | push_target below will invoke sim_close(), thus freeing various | |
682 | state (including a sim instance) that we allocate prior to | |
683 | invoking push_target(). We want to delay the push_target() | |
684 | operation until after we complete those operations which could | |
685 | error out. */ | |
686 | if (gdbsim_is_open) | |
c906108c SS |
687 | unpush_target (&gdbsim_ops); |
688 | ||
c5aa993b | 689 | len = (7 + 1 /* gdbsim */ |
c906108c SS |
690 | + strlen (" -E little") |
691 | + strlen (" --architecture=xxxxxxxxxx") | |
f4b8c29b | 692 | + strlen (" --sysroot=") + strlen (gdb_sysroot) + |
c906108c | 693 | + (args ? strlen (args) : 0) |
c5aa993b | 694 | + 50) /* slack */ ; |
c906108c | 695 | arg_buf = (char *) alloca (len); |
c5aa993b | 696 | strcpy (arg_buf, "gdbsim"); /* 7 */ |
b6d373df | 697 | /* Specify the byte order for the target when it is explicitly |
0df8b418 | 698 | specified by the user (not auto detected). */ |
b6d373df | 699 | switch (selected_byte_order ()) |
c906108c | 700 | { |
a8cf2722 AC |
701 | case BFD_ENDIAN_BIG: |
702 | strcat (arg_buf, " -E big"); | |
703 | break; | |
704 | case BFD_ENDIAN_LITTLE: | |
705 | strcat (arg_buf, " -E little"); | |
706 | break; | |
707 | case BFD_ENDIAN_UNKNOWN: | |
708 | break; | |
c906108c SS |
709 | } |
710 | /* Specify the architecture of the target when it has been | |
711 | explicitly specified */ | |
a8cf2722 | 712 | if (selected_architecture_name () != NULL) |
c906108c SS |
713 | { |
714 | strcat (arg_buf, " --architecture="); | |
a8cf2722 | 715 | strcat (arg_buf, selected_architecture_name ()); |
c906108c | 716 | } |
f4b8c29b MF |
717 | /* Pass along gdb's concept of the sysroot. */ |
718 | strcat (arg_buf, " --sysroot="); | |
719 | strcat (arg_buf, gdb_sysroot); | |
c906108c SS |
720 | /* finally, any explicit args */ |
721 | if (args) | |
722 | { | |
c5aa993b | 723 | strcat (arg_buf, " "); /* 1 */ |
c906108c SS |
724 | strcat (arg_buf, args); |
725 | } | |
db04efe6 | 726 | sim_argv = gdb_buildargv (arg_buf); |
c906108c SS |
727 | |
728 | init_callbacks (); | |
db04efe6 | 729 | gdbsim_desc = sim_open (SIM_OPEN_DEBUG, &gdb_callback, exec_bfd, sim_argv); |
c906108c SS |
730 | |
731 | if (gdbsim_desc == 0) | |
db04efe6 KB |
732 | { |
733 | freeargv (sim_argv); | |
734 | sim_argv = NULL; | |
735 | error (_("unable to create simulator instance")); | |
736 | } | |
737 | ||
738 | /* Reset the pid numberings for this batch of sim instances. */ | |
739 | next_pid = INITIAL_PID; | |
740 | ||
741 | /* Allocate the inferior data, but do not allocate a sim instance | |
742 | since we've already just done that. */ | |
0df8b418 MS |
743 | sim_data = get_sim_inferior_data (current_inferior (), |
744 | SIM_INSTANCE_NOT_NEEDED); | |
db04efe6 KB |
745 | |
746 | sim_data->gdbsim_desc = gdbsim_desc; | |
c906108c SS |
747 | |
748 | push_target (&gdbsim_ops); | |
c906108c | 749 | printf_filtered ("Connected to the simulator.\n"); |
52bb452f DJ |
750 | |
751 | /* There's nothing running after "target sim" or "load"; not until | |
752 | "run". */ | |
753 | inferior_ptid = null_ptid; | |
db04efe6 KB |
754 | |
755 | gdbsim_is_open = 1; | |
756 | } | |
757 | ||
758 | /* Callback for iterate_over_inferiors. Called (indirectly) by | |
759 | gdbsim_close(). */ | |
760 | ||
761 | static int | |
762 | gdbsim_close_inferior (struct inferior *inf, void *arg) | |
763 | { | |
764 | struct sim_inferior_data *sim_data = inferior_data (inf, | |
765 | sim_inferior_data_key); | |
766 | if (sim_data != NULL) | |
767 | { | |
768 | ptid_t ptid = sim_data->remote_sim_ptid; | |
769 | ||
770 | sim_inferior_data_cleanup (inf, sim_data); | |
771 | set_inferior_data (inf, sim_inferior_data_key, NULL); | |
772 | ||
773 | /* Having a ptid allocated and stored in remote_sim_ptid does | |
0df8b418 | 774 | not mean that a corresponding inferior was ever created. |
db04efe6 KB |
775 | Thus we need to verify the existence of an inferior using the |
776 | pid in question before setting inferior_ptid via | |
777 | switch_to_thread() or mourning the inferior. */ | |
778 | if (find_inferior_pid (ptid_get_pid (ptid)) != NULL) | |
779 | { | |
780 | switch_to_thread (ptid); | |
781 | generic_mourn_inferior (); | |
782 | } | |
783 | } | |
784 | ||
785 | return 0; | |
c906108c SS |
786 | } |
787 | ||
0df8b418 | 788 | /* Close out all files and local state before this target loses control. */ |
c906108c SS |
789 | |
790 | static void | |
de90e03d | 791 | gdbsim_close (struct target_ops *self) |
c906108c | 792 | { |
db04efe6 KB |
793 | struct sim_inferior_data *sim_data |
794 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
795 | ||
ea35711c | 796 | if (remote_debug) |
1385f66c | 797 | fprintf_unfiltered (gdb_stdlog, "gdbsim_close\n"); |
c906108c | 798 | |
db04efe6 | 799 | iterate_over_inferiors (gdbsim_close_inferior, NULL); |
c906108c | 800 | |
db04efe6 | 801 | if (sim_argv != NULL) |
c906108c | 802 | { |
db04efe6 KB |
803 | freeargv (sim_argv); |
804 | sim_argv = NULL; | |
c906108c SS |
805 | } |
806 | ||
807 | end_callbacks (); | |
db04efe6 KB |
808 | |
809 | gdbsim_is_open = 0; | |
c906108c SS |
810 | } |
811 | ||
812 | /* Takes a program previously attached to and detaches it. | |
813 | The program may resume execution (some targets do, some don't) and will | |
814 | no longer stop on signals, etc. We better not have left any breakpoints | |
815 | in the program or it'll die when it hits one. ARGS is arguments | |
816 | typed by the user (e.g. a signal to send the process). FROM_TTY | |
817 | says whether to be verbose or not. */ | |
818 | /* Terminate the open connection to the remote debugger. | |
819 | Use this when you want to detach and do something else with your gdb. */ | |
820 | ||
821 | static void | |
52554a0e | 822 | gdbsim_detach (struct target_ops *ops, const char *args, int from_tty) |
c906108c | 823 | { |
ea35711c | 824 | if (remote_debug) |
1385f66c | 825 | fprintf_unfiltered (gdb_stdlog, "gdbsim_detach: args \"%s\"\n", args); |
c906108c | 826 | |
7fdc1521 | 827 | unpush_target (ops); /* calls gdbsim_close to do the real work */ |
c906108c SS |
828 | if (from_tty) |
829 | printf_filtered ("Ending simulator %s debugging\n", target_shortname); | |
830 | } | |
c5aa993b | 831 | |
c906108c SS |
832 | /* Resume execution of the target process. STEP says whether to single-step |
833 | or to run free; SIGGNAL is the signal value (e.g. SIGINT) to be given | |
834 | to the target, or zero for no signal. */ | |
835 | ||
db04efe6 KB |
836 | struct resume_data |
837 | { | |
2ea28649 | 838 | enum gdb_signal siggnal; |
db04efe6 KB |
839 | int step; |
840 | }; | |
841 | ||
842 | static int | |
843 | gdbsim_resume_inferior (struct inferior *inf, void *arg) | |
844 | { | |
845 | struct sim_inferior_data *sim_data | |
846 | = get_sim_inferior_data (inf, SIM_INSTANCE_NOT_NEEDED); | |
847 | struct resume_data *rd = arg; | |
848 | ||
849 | if (sim_data) | |
850 | { | |
851 | sim_data->resume_siggnal = rd->siggnal; | |
852 | sim_data->resume_step = rd->step; | |
853 | ||
854 | if (remote_debug) | |
1385f66c PA |
855 | fprintf_unfiltered (gdb_stdlog, |
856 | _("gdbsim_resume: pid %d, step %d, signal %d\n"), | |
857 | inf->pid, rd->step, rd->siggnal); | |
db04efe6 KB |
858 | } |
859 | ||
860 | /* When called from iterate_over_inferiors, a zero return causes the | |
861 | iteration process to proceed until there are no more inferiors to | |
862 | consider. */ | |
863 | return 0; | |
864 | } | |
c906108c SS |
865 | |
866 | static void | |
2fb89e62 | 867 | gdbsim_resume (struct target_ops *ops, |
2ea28649 | 868 | ptid_t ptid, int step, enum gdb_signal siggnal) |
c906108c | 869 | { |
db04efe6 KB |
870 | struct resume_data rd; |
871 | struct sim_inferior_data *sim_data | |
872 | = get_sim_inferior_data_by_ptid (ptid, SIM_INSTANCE_NOT_NEEDED); | |
873 | ||
874 | rd.siggnal = siggnal; | |
875 | rd.step = step; | |
876 | ||
0df8b418 | 877 | /* We don't access any sim_data members within this function. |
db04efe6 KB |
878 | What's of interest is whether or not the call to |
879 | get_sim_inferior_data_by_ptid(), above, is able to obtain a | |
880 | non-NULL pointer. If it managed to obtain a non-NULL pointer, we | |
881 | know we have a single inferior to consider. If it's NULL, we | |
882 | either have multiple inferiors to resume or an error condition. */ | |
883 | ||
884 | if (sim_data) | |
885 | gdbsim_resume_inferior (find_inferior_pid (ptid_get_pid (ptid)), &rd); | |
886 | else if (ptid_equal (ptid, minus_one_ptid)) | |
887 | iterate_over_inferiors (gdbsim_resume_inferior, &rd); | |
888 | else | |
8a3fe4f8 | 889 | error (_("The program is not being run.")); |
c906108c SS |
890 | } |
891 | ||
892 | /* Notify the simulator of an asynchronous request to stop. | |
c5aa993b | 893 | |
c906108c SS |
894 | The simulator shall ensure that the stop request is eventually |
895 | delivered to the simulator. If the call is made while the | |
896 | simulator is not running then the stop request is processed when | |
897 | the simulator is next resumed. | |
898 | ||
db04efe6 KB |
899 | For simulators that do not support this operation, just abort. */ |
900 | ||
901 | static int | |
902 | gdbsim_stop_inferior (struct inferior *inf, void *arg) | |
903 | { | |
904 | struct sim_inferior_data *sim_data | |
905 | = get_sim_inferior_data (inf, SIM_INSTANCE_NEEDED); | |
906 | ||
907 | if (sim_data) | |
908 | { | |
909 | if (!sim_stop (sim_data->gdbsim_desc)) | |
910 | { | |
911 | quit (); | |
912 | } | |
913 | } | |
914 | ||
915 | /* When called from iterate_over_inferiors, a zero return causes the | |
916 | iteration process to proceed until there are no more inferiors to | |
917 | consider. */ | |
918 | return 0; | |
919 | } | |
c906108c SS |
920 | |
921 | static void | |
f9c72d52 | 922 | gdbsim_stop (ptid_t ptid) |
c906108c | 923 | { |
db04efe6 KB |
924 | struct sim_inferior_data *sim_data; |
925 | ||
926 | if (ptid_equal (ptid, minus_one_ptid)) | |
c906108c | 927 | { |
db04efe6 KB |
928 | iterate_over_inferiors (gdbsim_stop_inferior, NULL); |
929 | } | |
930 | else | |
931 | { | |
932 | struct inferior *inf = find_inferior_pid (ptid_get_pid (ptid)); | |
933 | ||
934 | if (inf == NULL) | |
0df8b418 MS |
935 | error (_("Can't stop pid %d. No inferior found."), |
936 | ptid_get_pid (ptid)); | |
db04efe6 KB |
937 | |
938 | gdbsim_stop_inferior (inf, NULL); | |
c906108c SS |
939 | } |
940 | } | |
941 | ||
942 | /* GDB version of os_poll_quit callback. | |
8a0ce09a | 943 | Taken from gdb/util.c - should be in a library. */ |
c906108c SS |
944 | |
945 | static int | |
fba45db2 | 946 | gdb_os_poll_quit (host_callback *p) |
c906108c | 947 | { |
98bbd631 AC |
948 | if (deprecated_ui_loop_hook != NULL) |
949 | deprecated_ui_loop_hook (0); | |
7a292a7a | 950 | |
522002f9 | 951 | if (check_quit_flag ()) /* gdb's idea of quit */ |
c906108c | 952 | { |
522002f9 | 953 | clear_quit_flag (); /* we've stolen it */ |
c906108c SS |
954 | return 1; |
955 | } | |
c906108c SS |
956 | return 0; |
957 | } | |
958 | ||
959 | /* Wait for inferior process to do something. Return pid of child, | |
960 | or -1 in case of error; store status through argument pointer STATUS, | |
0df8b418 | 961 | just as `wait' would. */ |
c906108c SS |
962 | |
963 | static void | |
fba45db2 | 964 | gdbsim_cntrl_c (int signo) |
c906108c | 965 | { |
db04efe6 | 966 | gdbsim_stop (minus_one_ptid); |
c906108c SS |
967 | } |
968 | ||
39f77062 | 969 | static ptid_t |
117de6a9 | 970 | gdbsim_wait (struct target_ops *ops, |
47608cb1 | 971 | ptid_t ptid, struct target_waitstatus *status, int options) |
c906108c | 972 | { |
db04efe6 | 973 | struct sim_inferior_data *sim_data; |
c906108c SS |
974 | static RETSIGTYPE (*prev_sigint) (); |
975 | int sigrc = 0; | |
976 | enum sim_stop reason = sim_running; | |
977 | ||
db04efe6 KB |
978 | /* This target isn't able to (yet) resume more than one inferior at a time. |
979 | When ptid is minus_one_ptid, just use the current inferior. If we're | |
980 | given an explicit pid, we'll try to find it and use that instead. */ | |
981 | if (ptid_equal (ptid, minus_one_ptid)) | |
0df8b418 MS |
982 | sim_data = get_sim_inferior_data (current_inferior (), |
983 | SIM_INSTANCE_NEEDED); | |
db04efe6 KB |
984 | else |
985 | { | |
986 | sim_data = get_sim_inferior_data_by_ptid (ptid, SIM_INSTANCE_NEEDED); | |
987 | if (sim_data == NULL) | |
988 | error (_("Unable to wait for pid %d. Inferior not found."), | |
989 | ptid_get_pid (ptid)); | |
990 | inferior_ptid = ptid; | |
991 | } | |
992 | ||
ea35711c | 993 | if (remote_debug) |
1385f66c | 994 | fprintf_unfiltered (gdb_stdlog, "gdbsim_wait\n"); |
c906108c SS |
995 | |
996 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) | |
997 | { | |
998 | struct sigaction sa, osa; | |
999 | sa.sa_handler = gdbsim_cntrl_c; | |
1000 | sigemptyset (&sa.sa_mask); | |
1001 | sa.sa_flags = 0; | |
1002 | sigaction (SIGINT, &sa, &osa); | |
1003 | prev_sigint = osa.sa_handler; | |
1004 | } | |
1005 | #else | |
1006 | prev_sigint = signal (SIGINT, gdbsim_cntrl_c); | |
1007 | #endif | |
db04efe6 KB |
1008 | sim_resume (sim_data->gdbsim_desc, sim_data->resume_step, |
1009 | sim_data->resume_siggnal); | |
1010 | ||
c906108c | 1011 | signal (SIGINT, prev_sigint); |
db04efe6 | 1012 | sim_data->resume_step = 0; |
c906108c | 1013 | |
db04efe6 | 1014 | sim_stop_reason (sim_data->gdbsim_desc, &reason, &sigrc); |
c906108c SS |
1015 | |
1016 | switch (reason) | |
1017 | { | |
1018 | case sim_exited: | |
1019 | status->kind = TARGET_WAITKIND_EXITED; | |
1020 | status->value.integer = sigrc; | |
1021 | break; | |
1022 | case sim_stopped: | |
1023 | switch (sigrc) | |
1024 | { | |
a493e3e2 | 1025 | case GDB_SIGNAL_ABRT: |
c906108c SS |
1026 | quit (); |
1027 | break; | |
a493e3e2 PA |
1028 | case GDB_SIGNAL_INT: |
1029 | case GDB_SIGNAL_TRAP: | |
c906108c SS |
1030 | default: |
1031 | status->kind = TARGET_WAITKIND_STOPPED; | |
aba6488e | 1032 | status->value.sig = sigrc; |
c906108c SS |
1033 | break; |
1034 | } | |
1035 | break; | |
1036 | case sim_signalled: | |
1037 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
aba6488e | 1038 | status->value.sig = sigrc; |
c906108c SS |
1039 | break; |
1040 | case sim_running: | |
1041 | case sim_polling: | |
0df8b418 | 1042 | /* FIXME: Is this correct? */ |
c906108c SS |
1043 | break; |
1044 | } | |
1045 | ||
39f77062 | 1046 | return inferior_ptid; |
c906108c SS |
1047 | } |
1048 | ||
1049 | /* Get ready to modify the registers array. On machines which store | |
1050 | individual registers, this doesn't need to do anything. On machines | |
1051 | which store all the registers in one fell swoop, this makes sure | |
1052 | that registers contains all the registers from the program being | |
1053 | debugged. */ | |
1054 | ||
1055 | static void | |
f32dbf8c | 1056 | gdbsim_prepare_to_store (struct target_ops *self, struct regcache *regcache) |
c906108c | 1057 | { |
0df8b418 | 1058 | /* Do nothing, since we can store individual regs. */ |
c906108c SS |
1059 | } |
1060 | ||
146ec4db PA |
1061 | /* Helper for gdbsim_xfer_partial that handles memory transfers. |
1062 | Arguments are like target_xfer_partial. */ | |
d93bce06 | 1063 | |
9b409511 | 1064 | static enum target_xfer_status |
146ec4db PA |
1065 | gdbsim_xfer_memory (struct target_ops *target, |
1066 | gdb_byte *readbuf, const gdb_byte *writebuf, | |
9b409511 | 1067 | ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) |
c906108c | 1068 | { |
db04efe6 KB |
1069 | struct sim_inferior_data *sim_data |
1070 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
b55e14c7 | 1071 | int l; |
db04efe6 | 1072 | |
0c012db1 KB |
1073 | /* If this target doesn't have memory yet, return 0 causing the |
1074 | request to be passed to a lower target, hopefully an exec | |
1075 | file. */ | |
1076 | if (!target->to_has_memory (target)) | |
9b409511 | 1077 | return TARGET_XFER_EOF; |
52bb452f | 1078 | |
db04efe6 | 1079 | if (!sim_data->program_loaded) |
8a3fe4f8 | 1080 | error (_("No program loaded.")); |
c906108c | 1081 | |
db04efe6 KB |
1082 | /* Note that we obtained the sim_data pointer above using |
1083 | SIM_INSTANCE_NOT_NEEDED. We do this so that we don't needlessly | |
1084 | allocate a sim instance prior to loading a program. If we | |
1085 | get to this point in the code though, gdbsim_desc should be | |
1086 | non-NULL. (Note that a sim instance is needed in order to load | |
1087 | the program...) */ | |
1088 | gdb_assert (sim_data->gdbsim_desc != NULL); | |
1089 | ||
ea35711c | 1090 | if (remote_debug) |
fcde0081 | 1091 | fprintf_unfiltered (gdb_stdlog, |
146ec4db PA |
1092 | "gdbsim_xfer_memory: readbuf %s, writebuf %s, " |
1093 | "memaddr %s, len %s\n", | |
1094 | host_address_to_string (readbuf), | |
1095 | host_address_to_string (writebuf), | |
fcde0081 | 1096 | paddress (target_gdbarch (), memaddr), |
b55e14c7 | 1097 | pulongest (len)); |
c906108c | 1098 | |
146ec4db | 1099 | if (writebuf) |
c906108c | 1100 | { |
fcde0081 | 1101 | if (remote_debug && len > 0) |
146ec4db | 1102 | dump_mem (writebuf, len); |
b55e14c7 | 1103 | l = sim_write (sim_data->gdbsim_desc, memaddr, writebuf, len); |
c906108c | 1104 | } |
c5aa993b | 1105 | else |
c906108c | 1106 | { |
b55e14c7 | 1107 | l = sim_read (sim_data->gdbsim_desc, memaddr, readbuf, len); |
ea35711c | 1108 | if (remote_debug && len > 0) |
146ec4db | 1109 | dump_mem (readbuf, len); |
c5aa993b | 1110 | } |
9b409511 YQ |
1111 | if (l > 0) |
1112 | { | |
1113 | *xfered_len = (ULONGEST) l; | |
1114 | return TARGET_XFER_OK; | |
1115 | } | |
1116 | else if (l == 0) | |
1117 | return TARGET_XFER_EOF; | |
1118 | else | |
1119 | return TARGET_XFER_E_IO; | |
c906108c SS |
1120 | } |
1121 | ||
146ec4db PA |
1122 | /* Target to_xfer_partial implementation. */ |
1123 | ||
9b409511 | 1124 | static enum target_xfer_status |
146ec4db PA |
1125 | gdbsim_xfer_partial (struct target_ops *ops, enum target_object object, |
1126 | const char *annex, gdb_byte *readbuf, | |
9b409511 YQ |
1127 | const gdb_byte *writebuf, ULONGEST offset, ULONGEST len, |
1128 | ULONGEST *xfered_len) | |
146ec4db PA |
1129 | { |
1130 | switch (object) | |
1131 | { | |
1132 | case TARGET_OBJECT_MEMORY: | |
9b409511 YQ |
1133 | return gdbsim_xfer_memory (ops, readbuf, writebuf, offset, len, |
1134 | xfered_len); | |
146ec4db PA |
1135 | |
1136 | default: | |
2ed4b548 | 1137 | return TARGET_XFER_E_IO; |
146ec4db PA |
1138 | } |
1139 | } | |
1140 | ||
c906108c | 1141 | static void |
fba45db2 | 1142 | gdbsim_files_info (struct target_ops *target) |
c906108c | 1143 | { |
db04efe6 KB |
1144 | struct sim_inferior_data *sim_data |
1145 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NEEDED); | |
0d18d720 | 1146 | const char *file = "nothing"; |
c906108c SS |
1147 | |
1148 | if (exec_bfd) | |
1149 | file = bfd_get_filename (exec_bfd); | |
1150 | ||
ea35711c | 1151 | if (remote_debug) |
1385f66c | 1152 | fprintf_unfiltered (gdb_stdlog, "gdbsim_files_info: file \"%s\"\n", file); |
c906108c SS |
1153 | |
1154 | if (exec_bfd) | |
1155 | { | |
1385f66c PA |
1156 | fprintf_unfiltered (gdb_stdlog, "\tAttached to %s running program %s\n", |
1157 | target_shortname, file); | |
db04efe6 | 1158 | sim_info (sim_data->gdbsim_desc, 0); |
c906108c SS |
1159 | } |
1160 | } | |
1161 | ||
1162 | /* Clear the simulator's notion of what the break points are. */ | |
1163 | ||
1164 | static void | |
3c8b2eda | 1165 | gdbsim_mourn_inferior (struct target_ops *target) |
c5aa993b | 1166 | { |
db04efe6 KB |
1167 | struct sim_inferior_data *sim_data |
1168 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
1169 | ||
ea35711c | 1170 | if (remote_debug) |
1385f66c | 1171 | fprintf_unfiltered (gdb_stdlog, "gdbsim_mourn_inferior:\n"); |
c906108c SS |
1172 | |
1173 | remove_breakpoints (); | |
1174 | generic_mourn_inferior (); | |
db04efe6 | 1175 | delete_thread_silent (sim_data->remote_sim_ptid); |
c906108c SS |
1176 | } |
1177 | ||
c906108c SS |
1178 | /* Pass the command argument through to the simulator verbatim. The |
1179 | simulator must do any command interpretation work. */ | |
1180 | ||
1181 | void | |
fba45db2 | 1182 | simulator_command (char *args, int from_tty) |
c906108c | 1183 | { |
db04efe6 KB |
1184 | struct sim_inferior_data *sim_data; |
1185 | ||
1186 | /* We use inferior_data() instead of get_sim_inferior_data() here in | |
1187 | order to avoid attaching a sim_inferior_data struct to an | |
1188 | inferior unnecessarily. The reason we take such care here is due | |
1189 | to the fact that this function, simulator_command(), may be called | |
1190 | even when the sim target is not active. If we were to use | |
1191 | get_sim_inferior_data() here, it is possible that this call would | |
1192 | be made either prior to gdbsim_open() or after gdbsim_close(), | |
1193 | thus allocating memory that would not be garbage collected until | |
1194 | the ultimate destruction of the associated inferior. */ | |
1195 | ||
1196 | sim_data = inferior_data (current_inferior (), sim_inferior_data_key); | |
1197 | if (sim_data == NULL || sim_data->gdbsim_desc == NULL) | |
c906108c SS |
1198 | { |
1199 | ||
1200 | /* PREVIOUSLY: The user may give a command before the simulator | |
1201 | is opened. [...] (??? assuming of course one wishes to | |
1202 | continue to allow commands to be sent to unopened simulators, | |
0df8b418 | 1203 | which isn't entirely unreasonable). */ |
c906108c SS |
1204 | |
1205 | /* The simulator is a builtin abstraction of a remote target. | |
1206 | Consistent with that model, access to the simulator, via sim | |
1207 | commands, is restricted to the period when the channel to the | |
0df8b418 | 1208 | simulator is open. */ |
c906108c | 1209 | |
8a3fe4f8 | 1210 | error (_("Not connected to the simulator target")); |
c906108c SS |
1211 | } |
1212 | ||
db04efe6 | 1213 | sim_do_command (sim_data->gdbsim_desc, args); |
c906108c SS |
1214 | |
1215 | /* Invalidate the register cache, in case the simulator command does | |
0df8b418 | 1216 | something funny. */ |
c5aa993b | 1217 | registers_changed (); |
c906108c SS |
1218 | } |
1219 | ||
34370865 | 1220 | static VEC (char_ptr) * |
3cb2ab1a SE |
1221 | sim_command_completer (struct cmd_list_element *ignore, const char *text, |
1222 | const char *word) | |
56a9aa1d MF |
1223 | { |
1224 | struct sim_inferior_data *sim_data; | |
34370865 JB |
1225 | char **tmp; |
1226 | int i; | |
09d5912c | 1227 | VEC (char_ptr) *result = NULL; |
56a9aa1d MF |
1228 | |
1229 | sim_data = inferior_data (current_inferior (), sim_inferior_data_key); | |
1230 | if (sim_data == NULL || sim_data->gdbsim_desc == NULL) | |
1231 | return NULL; | |
1232 | ||
34370865 JB |
1233 | tmp = sim_complete_command (sim_data->gdbsim_desc, text, word); |
1234 | if (tmp == NULL) | |
1235 | return NULL; | |
1236 | ||
1237 | /* Transform the array into a VEC, and then free the array. */ | |
1238 | for (i = 0; tmp[i] != NULL; i++) | |
1239 | VEC_safe_push (char_ptr, result, tmp[i]); | |
1240 | xfree (tmp); | |
1241 | ||
1242 | return result; | |
56a9aa1d MF |
1243 | } |
1244 | ||
9de2bdd7 PA |
1245 | /* Check to see if a thread is still alive. */ |
1246 | ||
1247 | static int | |
28439f5e | 1248 | gdbsim_thread_alive (struct target_ops *ops, ptid_t ptid) |
9de2bdd7 | 1249 | { |
db04efe6 KB |
1250 | struct sim_inferior_data *sim_data |
1251 | = get_sim_inferior_data_by_ptid (ptid, SIM_INSTANCE_NOT_NEEDED); | |
1252 | ||
1253 | if (sim_data == NULL) | |
1254 | return 0; | |
1255 | ||
1256 | if (ptid_equal (ptid, sim_data->remote_sim_ptid)) | |
9de2bdd7 PA |
1257 | /* The simulators' task is always alive. */ |
1258 | return 1; | |
1259 | ||
1260 | return 0; | |
1261 | } | |
1262 | ||
1263 | /* Convert a thread ID to a string. Returns the string in a static | |
1264 | buffer. */ | |
1265 | ||
1266 | static char * | |
117de6a9 | 1267 | gdbsim_pid_to_str (struct target_ops *ops, ptid_t ptid) |
9de2bdd7 | 1268 | { |
9de2bdd7 PA |
1269 | return normal_pid_to_str (ptid); |
1270 | } | |
1271 | ||
0c012db1 KB |
1272 | /* Simulator memory may be accessed after the program has been loaded. */ |
1273 | ||
b261e0c5 | 1274 | static int |
0c012db1 KB |
1275 | gdbsim_has_all_memory (struct target_ops *ops) |
1276 | { | |
1277 | struct sim_inferior_data *sim_data | |
1278 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
1279 | ||
1280 | if (!sim_data->program_loaded) | |
1281 | return 0; | |
1282 | ||
1283 | return 1; | |
1284 | } | |
1285 | ||
b261e0c5 | 1286 | static int |
0c012db1 KB |
1287 | gdbsim_has_memory (struct target_ops *ops) |
1288 | { | |
1289 | struct sim_inferior_data *sim_data | |
1290 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
1291 | ||
1292 | if (!sim_data->program_loaded) | |
1293 | return 0; | |
1294 | ||
1295 | return 1; | |
1296 | } | |
1297 | ||
0df8b418 | 1298 | /* Define the target subroutine names. */ |
c906108c | 1299 | |
c5aa993b JM |
1300 | struct target_ops gdbsim_ops; |
1301 | ||
1302 | static void | |
1303 | init_gdbsim_ops (void) | |
1304 | { | |
1305 | gdbsim_ops.to_shortname = "sim"; | |
1306 | gdbsim_ops.to_longname = "simulator"; | |
1307 | gdbsim_ops.to_doc = "Use the compiled-in simulator."; | |
1308 | gdbsim_ops.to_open = gdbsim_open; | |
1309 | gdbsim_ops.to_close = gdbsim_close; | |
c5aa993b | 1310 | gdbsim_ops.to_detach = gdbsim_detach; |
c5aa993b JM |
1311 | gdbsim_ops.to_resume = gdbsim_resume; |
1312 | gdbsim_ops.to_wait = gdbsim_wait; | |
c5aa993b JM |
1313 | gdbsim_ops.to_fetch_registers = gdbsim_fetch_register; |
1314 | gdbsim_ops.to_store_registers = gdbsim_store_register; | |
1315 | gdbsim_ops.to_prepare_to_store = gdbsim_prepare_to_store; | |
146ec4db | 1316 | gdbsim_ops.to_xfer_partial = gdbsim_xfer_partial; |
c5aa993b | 1317 | gdbsim_ops.to_files_info = gdbsim_files_info; |
8181d85f DJ |
1318 | gdbsim_ops.to_insert_breakpoint = memory_insert_breakpoint; |
1319 | gdbsim_ops.to_remove_breakpoint = memory_remove_breakpoint; | |
c5aa993b JM |
1320 | gdbsim_ops.to_kill = gdbsim_kill; |
1321 | gdbsim_ops.to_load = gdbsim_load; | |
c5aa993b | 1322 | gdbsim_ops.to_create_inferior = gdbsim_create_inferior; |
c5aa993b | 1323 | gdbsim_ops.to_mourn_inferior = gdbsim_mourn_inferior; |
c5aa993b | 1324 | gdbsim_ops.to_stop = gdbsim_stop; |
9de2bdd7 PA |
1325 | gdbsim_ops.to_thread_alive = gdbsim_thread_alive; |
1326 | gdbsim_ops.to_pid_to_str = gdbsim_pid_to_str; | |
c5aa993b | 1327 | gdbsim_ops.to_stratum = process_stratum; |
0c012db1 KB |
1328 | gdbsim_ops.to_has_all_memory = gdbsim_has_all_memory; |
1329 | gdbsim_ops.to_has_memory = gdbsim_has_memory; | |
c35b1492 PA |
1330 | gdbsim_ops.to_has_stack = default_child_has_stack; |
1331 | gdbsim_ops.to_has_registers = default_child_has_registers; | |
1332 | gdbsim_ops.to_has_execution = default_child_has_execution; | |
c5aa993b | 1333 | gdbsim_ops.to_magic = OPS_MAGIC; |
c906108c SS |
1334 | } |
1335 | ||
1336 | void | |
fba45db2 | 1337 | _initialize_remote_sim (void) |
c906108c | 1338 | { |
56a9aa1d MF |
1339 | struct cmd_list_element *c; |
1340 | ||
c5aa993b | 1341 | init_gdbsim_ops (); |
c906108c SS |
1342 | add_target (&gdbsim_ops); |
1343 | ||
56a9aa1d MF |
1344 | c = add_com ("sim", class_obscure, simulator_command, |
1345 | _("Send a command to the simulator.")); | |
1346 | set_cmd_completer (c, sim_command_completer); | |
9de2bdd7 | 1347 | |
db04efe6 | 1348 | sim_inferior_data_key |
c5d9b215 | 1349 | = register_inferior_data_with_cleanup (NULL, sim_inferior_data_cleanup); |
c906108c | 1350 | } |