Commit | Line | Data |
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c906108c | 1 | /* Generic remote debugging interface for simulators. |
0a65a603 | 2 | |
6aba47ca | 3 | Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, |
4c38e0a4 | 4 | 2004, 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc. |
0a65a603 | 5 | |
c906108c SS |
6 | Contributed by Cygnus Support. |
7 | Steve Chamberlain (sac@cygnus.com). | |
8 | ||
c5aa993b | 9 | This file is part of GDB. |
c906108c | 10 | |
c5aa993b JM |
11 | This program is free software; you can redistribute it and/or modify |
12 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 13 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 14 | (at your option) any later version. |
c906108c | 15 | |
c5aa993b JM |
16 | This program is distributed in the hope that it will be useful, |
17 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | GNU General Public License for more details. | |
c906108c | 20 | |
c5aa993b | 21 | You should have received a copy of the GNU General Public License |
a9762ec7 | 22 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
23 | |
24 | #include "defs.h" | |
25 | #include "inferior.h" | |
c906108c SS |
26 | #include "value.h" |
27 | #include "gdb_string.h" | |
28 | #include <ctype.h> | |
29 | #include <fcntl.h> | |
30 | #include <signal.h> | |
31 | #include <setjmp.h> | |
32 | #include <errno.h> | |
33 | #include "terminal.h" | |
34 | #include "target.h" | |
35 | #include "gdbcore.h" | |
3c25f8c7 AC |
36 | #include "gdb/callback.h" |
37 | #include "gdb/remote-sim.h" | |
c906108c | 38 | #include "command.h" |
4e052eda | 39 | #include "regcache.h" |
8238d0bf AC |
40 | #include "gdb_assert.h" |
41 | #include "sim-regno.h" | |
a8cf2722 | 42 | #include "arch-utils.h" |
1986bccd | 43 | #include "readline/readline.h" |
9de2bdd7 | 44 | #include "gdbthread.h" |
c906108c SS |
45 | |
46 | /* Prototypes */ | |
47 | ||
a14ed312 | 48 | extern void _initialize_remote_sim (void); |
392a587b | 49 | |
a14ed312 | 50 | static void dump_mem (char *buf, int len); |
c906108c | 51 | |
a14ed312 | 52 | static void init_callbacks (void); |
c906108c | 53 | |
a14ed312 | 54 | static void end_callbacks (void); |
c906108c | 55 | |
a14ed312 | 56 | static int gdb_os_write_stdout (host_callback *, const char *, int); |
c906108c | 57 | |
a14ed312 | 58 | static void gdb_os_flush_stdout (host_callback *); |
c906108c | 59 | |
a14ed312 | 60 | static int gdb_os_write_stderr (host_callback *, const char *, int); |
c906108c | 61 | |
a14ed312 | 62 | static void gdb_os_flush_stderr (host_callback *); |
c906108c | 63 | |
a14ed312 | 64 | static int gdb_os_poll_quit (host_callback *); |
c906108c SS |
65 | |
66 | /* printf_filtered is depreciated */ | |
a14ed312 | 67 | static void gdb_os_printf_filtered (host_callback *, const char *, ...); |
c906108c | 68 | |
a14ed312 | 69 | static void gdb_os_vprintf_filtered (host_callback *, const char *, va_list); |
c906108c | 70 | |
a14ed312 | 71 | static void gdb_os_evprintf_filtered (host_callback *, const char *, va_list); |
c906108c | 72 | |
c25c4a8b JK |
73 | static void gdb_os_error (host_callback *, const char *, ...) |
74 | ATTRIBUTE_NORETURN; | |
c906108c | 75 | |
7d85a9c0 | 76 | static void gdbsim_kill (struct target_ops *); |
c906108c | 77 | |
a14ed312 | 78 | static void gdbsim_load (char *prog, int fromtty); |
c906108c | 79 | |
a14ed312 | 80 | static void gdbsim_open (char *args, int from_tty); |
c906108c | 81 | |
a14ed312 | 82 | static void gdbsim_close (int quitting); |
c906108c | 83 | |
136d6dae | 84 | static void gdbsim_detach (struct target_ops *ops, char *args, int from_tty); |
c906108c | 85 | |
316f2060 | 86 | static void gdbsim_prepare_to_store (struct regcache *regcache); |
c906108c | 87 | |
a14ed312 | 88 | static void gdbsim_files_info (struct target_ops *target); |
c906108c | 89 | |
3c8b2eda | 90 | static void gdbsim_mourn_inferior (struct target_ops *target); |
c906108c | 91 | |
f9c72d52 | 92 | static void gdbsim_stop (ptid_t ptid); |
c906108c | 93 | |
a14ed312 | 94 | void simulator_command (char *args, int from_tty); |
c906108c SS |
95 | |
96 | /* Naming convention: | |
97 | ||
98 | sim_* are the interface to the simulator (see remote-sim.h). | |
99 | gdbsim_* are stuff which is internal to gdb. */ | |
100 | ||
101 | /* Forward data declarations */ | |
102 | extern struct target_ops gdbsim_ops; | |
103 | ||
db04efe6 KB |
104 | static const struct inferior_data *sim_inferior_data_key; |
105 | ||
106 | /* Simulator-specific, per-inferior state. */ | |
107 | struct sim_inferior_data { | |
108 | /* Flag which indicates whether or not the program has been loaded. */ | |
109 | int program_loaded; | |
110 | ||
111 | /* Simulator descriptor for this inferior. */ | |
112 | SIM_DESC gdbsim_desc; | |
113 | ||
114 | /* This is the ptid we use for this particular simulator instance. Its | |
115 | value is somewhat arbitrary, as the simulator target don't have a | |
116 | notion of tasks or threads, but we need something non-null to place | |
117 | in inferior_ptid. For simulators which permit multiple instances, | |
118 | we also need a unique identifier to use for each inferior. */ | |
119 | ptid_t remote_sim_ptid; | |
120 | ||
121 | /* Signal with which to resume. */ | |
122 | enum target_signal resume_siggnal; | |
123 | ||
124 | /* Flag which indicates whether resume should step or not. */ | |
125 | int resume_step; | |
126 | }; | |
127 | ||
128 | /* Flag indicating the "open" status of this module. It's set to 1 | |
129 | in gdbsim_open() and 0 in gdbsim_close(). */ | |
130 | static int gdbsim_is_open = 0; | |
131 | ||
132 | /* Value of the next pid to allocate for an inferior. As indicated | |
133 | elsewhere, its initial value is somewhat arbitrary; it's critical | |
134 | though that it's not zero or negative. */ | |
135 | static int next_pid; | |
136 | #define INITIAL_PID 42000 | |
137 | ||
138 | /* Argument list to pass to sim_open(). It is allocated in gdbsim_open() | |
139 | and deallocated in gdbsim_close(). The lifetime needs to extend beyond | |
140 | the call to gdbsim_open() due to the fact that other sim instances other | |
141 | than the first will be allocated after the gdbsim_open() call. */ | |
142 | static char **sim_argv = NULL; | |
143 | ||
144 | /* OS-level callback functions for write, flush, etc. */ | |
145 | static host_callback gdb_callback; | |
146 | static int callbacks_initialized = 0; | |
147 | ||
148 | /* Callback for iterate_over_inferiors. It checks to see if the sim | |
149 | descriptor passed via ARG is the same as that for the inferior | |
150 | designated by INF. Return true if so; false otherwise. */ | |
151 | ||
152 | static int | |
153 | check_for_duplicate_sim_descriptor (struct inferior *inf, void *arg) | |
154 | { | |
155 | struct sim_inferior_data *sim_data; | |
156 | SIM_DESC new_sim_desc = arg; | |
157 | ||
158 | sim_data = inferior_data (inf, sim_inferior_data_key); | |
159 | ||
160 | return (sim_data != NULL && sim_data->gdbsim_desc == new_sim_desc); | |
161 | } | |
162 | ||
163 | /* Flags indicating whether or not a sim instance is needed. One of these | |
164 | flags should be passed to get_sim_inferior_data(). */ | |
165 | ||
166 | enum {SIM_INSTANCE_NOT_NEEDED = 0, SIM_INSTANCE_NEEDED = 1}; | |
167 | ||
168 | /* Obtain pointer to per-inferior simulator data, allocating it if necessary. | |
169 | Attempt to open the sim if SIM_INSTANCE_NEEDED is true. */ | |
170 | ||
171 | static struct sim_inferior_data * | |
172 | get_sim_inferior_data (struct inferior *inf, int sim_instance_needed) | |
173 | { | |
174 | SIM_DESC sim_desc = NULL; | |
175 | struct sim_inferior_data *sim_data | |
176 | = inferior_data (inf, sim_inferior_data_key); | |
177 | ||
178 | /* Try to allocate a new sim instance, if needed. We do this ahead of | |
179 | a potential allocation of a sim_inferior_data struct in order to | |
180 | avoid needlessly allocating that struct in the event that the sim | |
181 | instance allocation fails. */ | |
182 | if (sim_instance_needed == SIM_INSTANCE_NEEDED | |
183 | && (sim_data == NULL || sim_data->gdbsim_desc == NULL)) | |
184 | { | |
185 | struct inferior *idup; | |
186 | sim_desc = sim_open (SIM_OPEN_DEBUG, &gdb_callback, exec_bfd, sim_argv); | |
187 | if (sim_desc == NULL) | |
188 | error (_("Unable to create simulator instance for inferior %d."), | |
189 | inf->num); | |
190 | ||
191 | idup = iterate_over_inferiors (check_for_duplicate_sim_descriptor, | |
192 | sim_desc); | |
193 | if (idup != NULL) | |
194 | { | |
195 | /* We don't close the descriptor due to the fact that it's | |
196 | shared with some other inferior. If we were to close it, | |
197 | that might needlessly muck up the other inferior. Of | |
198 | course, it's possible that the damage has already been | |
199 | done... Note that it *will* ultimately be closed during | |
200 | cleanup of the other inferior. */ | |
201 | sim_desc = NULL; | |
202 | error ( | |
203 | _("Inferior %d and inferior %d would have identical simulator state.\n" | |
204 | "(This simulator does not support the running of more than one inferior.)"), | |
205 | inf->num, idup->num); | |
206 | } | |
207 | } | |
208 | ||
209 | if (sim_data == NULL) | |
210 | { | |
211 | sim_data = XZALLOC(struct sim_inferior_data); | |
212 | set_inferior_data (inf, sim_inferior_data_key, sim_data); | |
213 | ||
214 | /* Allocate a ptid for this inferior. */ | |
215 | sim_data->remote_sim_ptid = ptid_build (next_pid, 0, next_pid); | |
216 | next_pid++; | |
217 | ||
218 | /* Initialize the other instance variables. */ | |
219 | sim_data->program_loaded = 0; | |
220 | sim_data->gdbsim_desc = sim_desc; | |
221 | sim_data->resume_siggnal = TARGET_SIGNAL_0; | |
222 | sim_data->resume_step = 0; | |
223 | } | |
224 | else if (sim_desc) | |
225 | { | |
226 | /* This handles the case where sim_data was allocated prior to | |
227 | needing a sim instance. */ | |
228 | sim_data->gdbsim_desc = sim_desc; | |
229 | } | |
c906108c | 230 | |
c906108c | 231 | |
db04efe6 KB |
232 | return sim_data; |
233 | } | |
234 | ||
235 | /* Return pointer to per-inferior simulator data using PTID to find the | |
236 | inferior in question. Return NULL when no inferior is found or | |
237 | when ptid has a zero or negative pid component. */ | |
238 | ||
239 | static struct sim_inferior_data * | |
240 | get_sim_inferior_data_by_ptid (ptid_t ptid, int sim_instance_needed) | |
241 | { | |
242 | struct inferior *inf; | |
243 | int pid = ptid_get_pid (ptid); | |
244 | ||
245 | if (pid <= 0) | |
246 | return NULL; | |
247 | ||
248 | inf = find_inferior_pid (pid); | |
249 | ||
250 | if (inf) | |
251 | return get_sim_inferior_data (inf, sim_instance_needed); | |
252 | else | |
253 | return NULL; | |
254 | } | |
255 | ||
256 | /* Free the per-inferior simulator data. */ | |
257 | ||
258 | static void | |
259 | sim_inferior_data_cleanup (struct inferior *inf, void *data) | |
260 | { | |
261 | struct sim_inferior_data *sim_data = data; | |
262 | ||
263 | if (sim_data != NULL) | |
264 | { | |
265 | if (sim_data->gdbsim_desc) | |
266 | { | |
267 | sim_close (sim_data->gdbsim_desc, 0); | |
268 | sim_data->gdbsim_desc = NULL; | |
269 | } | |
270 | xfree (sim_data); | |
271 | } | |
272 | } | |
9de2bdd7 | 273 | |
c906108c | 274 | static void |
fba45db2 | 275 | dump_mem (char *buf, int len) |
c906108c SS |
276 | { |
277 | if (len <= 8) | |
278 | { | |
279 | if (len == 8 || len == 4) | |
280 | { | |
281 | long l[2]; | |
123f5f96 | 282 | |
c906108c | 283 | memcpy (l, buf, len); |
d4f3574e | 284 | printf_filtered ("\t0x%lx", l[0]); |
a6da1910 AC |
285 | if (len == 8) |
286 | printf_filtered (" 0x%lx", l[1]); | |
287 | printf_filtered ("\n"); | |
c906108c SS |
288 | } |
289 | else | |
290 | { | |
291 | int i; | |
123f5f96 | 292 | |
c906108c SS |
293 | printf_filtered ("\t"); |
294 | for (i = 0; i < len; i++) | |
295 | printf_filtered ("0x%x ", buf[i]); | |
296 | printf_filtered ("\n"); | |
297 | } | |
298 | } | |
299 | } | |
300 | ||
c906108c SS |
301 | /* Initialize gdb_callback. */ |
302 | ||
303 | static void | |
fba45db2 | 304 | init_callbacks (void) |
c906108c | 305 | { |
c5aa993b | 306 | if (!callbacks_initialized) |
c906108c SS |
307 | { |
308 | gdb_callback = default_callback; | |
309 | gdb_callback.init (&gdb_callback); | |
310 | gdb_callback.write_stdout = gdb_os_write_stdout; | |
311 | gdb_callback.flush_stdout = gdb_os_flush_stdout; | |
312 | gdb_callback.write_stderr = gdb_os_write_stderr; | |
313 | gdb_callback.flush_stderr = gdb_os_flush_stderr; | |
314 | gdb_callback.printf_filtered = gdb_os_printf_filtered; | |
315 | gdb_callback.vprintf_filtered = gdb_os_vprintf_filtered; | |
316 | gdb_callback.evprintf_filtered = gdb_os_evprintf_filtered; | |
317 | gdb_callback.error = gdb_os_error; | |
318 | gdb_callback.poll_quit = gdb_os_poll_quit; | |
319 | gdb_callback.magic = HOST_CALLBACK_MAGIC; | |
320 | callbacks_initialized = 1; | |
321 | } | |
322 | } | |
323 | ||
324 | /* Release callbacks (free resources used by them). */ | |
325 | ||
326 | static void | |
fba45db2 | 327 | end_callbacks (void) |
c906108c SS |
328 | { |
329 | if (callbacks_initialized) | |
330 | { | |
331 | gdb_callback.shutdown (&gdb_callback); | |
332 | callbacks_initialized = 0; | |
333 | } | |
334 | } | |
335 | ||
336 | /* GDB version of os_write_stdout callback. */ | |
337 | ||
c5aa993b | 338 | static int |
fba45db2 | 339 | gdb_os_write_stdout (host_callback *p, const char *buf, int len) |
c906108c SS |
340 | { |
341 | int i; | |
342 | char b[2]; | |
343 | ||
d9fcf2fb | 344 | ui_file_write (gdb_stdtarg, buf, len); |
c906108c SS |
345 | return len; |
346 | } | |
347 | ||
348 | /* GDB version of os_flush_stdout callback. */ | |
349 | ||
350 | static void | |
fba45db2 | 351 | gdb_os_flush_stdout (host_callback *p) |
c906108c | 352 | { |
4ce44c66 | 353 | gdb_flush (gdb_stdtarg); |
c906108c SS |
354 | } |
355 | ||
356 | /* GDB version of os_write_stderr callback. */ | |
357 | ||
c5aa993b | 358 | static int |
fba45db2 | 359 | gdb_os_write_stderr (host_callback *p, const char *buf, int len) |
c906108c SS |
360 | { |
361 | int i; | |
362 | char b[2]; | |
363 | ||
c5aa993b | 364 | for (i = 0; i < len; i++) |
c906108c SS |
365 | { |
366 | b[0] = buf[i]; | |
367 | b[1] = 0; | |
22e8e3c7 | 368 | fputs_unfiltered (b, gdb_stdtargerr); |
c906108c SS |
369 | } |
370 | return len; | |
371 | } | |
372 | ||
373 | /* GDB version of os_flush_stderr callback. */ | |
374 | ||
375 | static void | |
fba45db2 | 376 | gdb_os_flush_stderr (host_callback *p) |
c906108c | 377 | { |
22e8e3c7 | 378 | gdb_flush (gdb_stdtargerr); |
c906108c SS |
379 | } |
380 | ||
381 | /* GDB version of printf_filtered callback. */ | |
382 | ||
c906108c | 383 | static void |
c5aa993b | 384 | gdb_os_printf_filtered (host_callback * p, const char *format,...) |
c906108c SS |
385 | { |
386 | va_list args; | |
c906108c | 387 | |
123f5f96 | 388 | va_start (args, format); |
c906108c | 389 | vfprintf_filtered (gdb_stdout, format, args); |
c906108c SS |
390 | va_end (args); |
391 | } | |
392 | ||
393 | /* GDB version of error vprintf_filtered. */ | |
394 | ||
c906108c | 395 | static void |
c5aa993b | 396 | gdb_os_vprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c SS |
397 | { |
398 | vfprintf_filtered (gdb_stdout, format, ap); | |
399 | } | |
400 | ||
401 | /* GDB version of error evprintf_filtered. */ | |
402 | ||
c906108c | 403 | static void |
c5aa993b | 404 | gdb_os_evprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c SS |
405 | { |
406 | vfprintf_filtered (gdb_stderr, format, ap); | |
407 | } | |
408 | ||
409 | /* GDB version of error callback. */ | |
410 | ||
c906108c | 411 | static void |
58d4abe1 | 412 | gdb_os_error (host_callback * p, const char *format, ...) |
c906108c | 413 | { |
58d4abe1 | 414 | va_list args; |
123f5f96 | 415 | |
58d4abe1 PA |
416 | va_start (args, format); |
417 | verror (format, args); | |
418 | va_end (args); | |
c906108c SS |
419 | } |
420 | ||
8238d0bf | 421 | int |
e7faf938 | 422 | one2one_register_sim_regno (struct gdbarch *gdbarch, int regnum) |
8238d0bf AC |
423 | { |
424 | /* Only makes sense to supply raw registers. */ | |
e7faf938 | 425 | gdb_assert (regnum >= 0 && regnum < gdbarch_num_regs (gdbarch)); |
8238d0bf AC |
426 | return regnum; |
427 | } | |
428 | ||
c906108c | 429 | static void |
28439f5e PA |
430 | gdbsim_fetch_register (struct target_ops *ops, |
431 | struct regcache *regcache, int regno) | |
c906108c | 432 | { |
40a6adc1 | 433 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
db04efe6 KB |
434 | struct sim_inferior_data *sim_data |
435 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NEEDED); | |
123f5f96 | 436 | |
c5aa993b | 437 | if (regno == -1) |
c906108c | 438 | { |
40a6adc1 | 439 | for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++) |
28439f5e | 440 | gdbsim_fetch_register (ops, regcache, regno); |
8238d0bf | 441 | return; |
c906108c | 442 | } |
8238d0bf | 443 | |
40a6adc1 | 444 | switch (gdbarch_register_sim_regno (gdbarch, regno)) |
c906108c | 445 | { |
8238d0bf AC |
446 | case LEGACY_SIM_REGNO_IGNORE: |
447 | break; | |
448 | case SIM_REGNO_DOES_NOT_EXIST: | |
449 | { | |
450 | /* For moment treat a `does not exist' register the same way | |
451 | as an ``unavailable'' register. */ | |
d9d9c31f | 452 | char buf[MAX_REGISTER_SIZE]; |
8238d0bf | 453 | int nr_bytes; |
123f5f96 | 454 | |
d9d9c31f | 455 | memset (buf, 0, MAX_REGISTER_SIZE); |
56be3814 | 456 | regcache_raw_supply (regcache, regno, buf); |
8238d0bf AC |
457 | break; |
458 | } | |
56be3814 | 459 | |
8238d0bf AC |
460 | default: |
461 | { | |
462 | static int warn_user = 1; | |
d9d9c31f | 463 | char buf[MAX_REGISTER_SIZE]; |
8238d0bf | 464 | int nr_bytes; |
123f5f96 | 465 | |
40a6adc1 | 466 | gdb_assert (regno >= 0 && regno < gdbarch_num_regs (gdbarch)); |
d9d9c31f | 467 | memset (buf, 0, MAX_REGISTER_SIZE); |
db04efe6 | 468 | nr_bytes = sim_fetch_register (sim_data->gdbsim_desc, |
474c1661 | 469 | gdbarch_register_sim_regno |
40a6adc1 | 470 | (gdbarch, regno), |
474c1661 | 471 | buf, |
40a6adc1 MD |
472 | register_size (gdbarch, regno)); |
473 | if (nr_bytes > 0 | |
474 | && nr_bytes != register_size (gdbarch, regno) && warn_user) | |
8238d0bf AC |
475 | { |
476 | fprintf_unfiltered (gdb_stderr, | |
477 | "Size of register %s (%d/%d) incorrect (%d instead of %d))", | |
40a6adc1 | 478 | gdbarch_register_name (gdbarch, regno), |
474c1661 UW |
479 | regno, |
480 | gdbarch_register_sim_regno | |
40a6adc1 MD |
481 | (gdbarch, regno), |
482 | nr_bytes, register_size (gdbarch, regno)); | |
8238d0bf AC |
483 | warn_user = 0; |
484 | } | |
485 | /* FIXME: cagney/2002-05-27: Should check `nr_bytes == 0' | |
278a7cf7 | 486 | indicating that GDB and the SIM have different ideas about |
8238d0bf AC |
487 | which registers are fetchable. */ |
488 | /* Else if (nr_bytes < 0): an old simulator, that doesn't | |
489 | think to return the register size. Just assume all is ok. */ | |
56be3814 | 490 | regcache_raw_supply (regcache, regno, buf); |
ea35711c | 491 | if (remote_debug) |
8238d0bf AC |
492 | { |
493 | printf_filtered ("gdbsim_fetch_register: %d", regno); | |
494 | /* FIXME: We could print something more intelligible. */ | |
40a6adc1 | 495 | dump_mem (buf, register_size (gdbarch, regno)); |
8238d0bf AC |
496 | } |
497 | break; | |
498 | } | |
c906108c SS |
499 | } |
500 | } | |
501 | ||
502 | ||
503 | static void | |
28439f5e PA |
504 | gdbsim_store_register (struct target_ops *ops, |
505 | struct regcache *regcache, int regno) | |
c906108c | 506 | { |
40a6adc1 | 507 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
db04efe6 KB |
508 | struct sim_inferior_data *sim_data |
509 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NEEDED); | |
510 | ||
c5aa993b | 511 | if (regno == -1) |
c906108c | 512 | { |
40a6adc1 | 513 | for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++) |
28439f5e | 514 | gdbsim_store_register (ops, regcache, regno); |
8238d0bf | 515 | return; |
c906108c | 516 | } |
40a6adc1 | 517 | else if (gdbarch_register_sim_regno (gdbarch, regno) >= 0) |
c906108c | 518 | { |
123a958e | 519 | char tmp[MAX_REGISTER_SIZE]; |
c906108c | 520 | int nr_bytes; |
123f5f96 | 521 | |
56be3814 | 522 | regcache_cooked_read (regcache, regno, tmp); |
db04efe6 | 523 | nr_bytes = sim_store_register (sim_data->gdbsim_desc, |
474c1661 | 524 | gdbarch_register_sim_regno |
40a6adc1 MD |
525 | (gdbarch, regno), |
526 | tmp, register_size (gdbarch, regno)); | |
527 | if (nr_bytes > 0 && nr_bytes != register_size (gdbarch, regno)) | |
8e65ff28 | 528 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 529 | _("Register size different to expected")); |
8238d0bf | 530 | /* FIXME: cagney/2002-05-27: Should check `nr_bytes == 0' |
278a7cf7 | 531 | indicating that GDB and the SIM have different ideas about |
8238d0bf | 532 | which registers are fetchable. */ |
ea35711c | 533 | if (remote_debug) |
c906108c SS |
534 | { |
535 | printf_filtered ("gdbsim_store_register: %d", regno); | |
536 | /* FIXME: We could print something more intelligible. */ | |
40a6adc1 | 537 | dump_mem (tmp, register_size (gdbarch, regno)); |
c906108c SS |
538 | } |
539 | } | |
540 | } | |
541 | ||
542 | /* Kill the running program. This may involve closing any open files | |
543 | and releasing other resources acquired by the simulated program. */ | |
544 | ||
545 | static void | |
7d85a9c0 | 546 | gdbsim_kill (struct target_ops *ops) |
c906108c | 547 | { |
ea35711c | 548 | if (remote_debug) |
c906108c SS |
549 | printf_filtered ("gdbsim_kill\n"); |
550 | ||
551 | /* There is no need to `kill' running simulator - the simulator is | |
52bb452f DJ |
552 | not running. Mourning it is enough. */ |
553 | target_mourn_inferior (); | |
c906108c SS |
554 | } |
555 | ||
556 | /* Load an executable file into the target process. This is expected to | |
557 | not only bring new code into the target process, but also to update | |
558 | GDB's symbol tables to match. */ | |
559 | ||
560 | static void | |
1986bccd | 561 | gdbsim_load (char *args, int fromtty) |
c906108c | 562 | { |
d1a41061 | 563 | char **argv; |
1986bccd | 564 | char *prog; |
db04efe6 KB |
565 | struct sim_inferior_data *sim_data |
566 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NEEDED); | |
1986bccd | 567 | |
d1a41061 PP |
568 | if (args == NULL) |
569 | error_no_arg (_("program to load")); | |
1986bccd | 570 | |
d1a41061 | 571 | argv = gdb_buildargv (args); |
1986bccd AS |
572 | make_cleanup_freeargv (argv); |
573 | ||
574 | prog = tilde_expand (argv[0]); | |
575 | ||
576 | if (argv[1] != NULL) | |
577 | error (_("GDB sim does not yet support a load offset.")); | |
578 | ||
ea35711c | 579 | if (remote_debug) |
c906108c SS |
580 | printf_filtered ("gdbsim_load: prog \"%s\"\n", prog); |
581 | ||
c906108c SS |
582 | /* FIXME: We will print two messages on error. |
583 | Need error to either not print anything if passed NULL or need | |
584 | another routine that doesn't take any arguments. */ | |
db04efe6 | 585 | if (sim_load (sim_data->gdbsim_desc, prog, NULL, fromtty) == SIM_RC_FAIL) |
8a3fe4f8 | 586 | error (_("unable to load program")); |
c906108c SS |
587 | |
588 | /* FIXME: If a load command should reset the targets registers then | |
589 | a call to sim_create_inferior() should go here. */ | |
590 | ||
db04efe6 | 591 | sim_data->program_loaded = 1; |
c906108c SS |
592 | } |
593 | ||
594 | ||
39f77062 | 595 | /* Start an inferior process and set inferior_ptid to its pid. |
c906108c SS |
596 | EXEC_FILE is the file to run. |
597 | ARGS is a string containing the arguments to the program. | |
598 | ENV is the environment vector to pass. Errors reported with error(). | |
599 | On VxWorks and various standalone systems, we ignore exec_file. */ | |
600 | /* This is called not only when we first attach, but also when the | |
601 | user types "run" after having attached. */ | |
602 | ||
603 | static void | |
3c8b2eda TJB |
604 | gdbsim_create_inferior (struct target_ops *target, char *exec_file, char *args, |
605 | char **env, int from_tty) | |
c906108c | 606 | { |
db04efe6 KB |
607 | struct sim_inferior_data *sim_data |
608 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NEEDED); | |
c906108c | 609 | int len; |
c5aa993b | 610 | char *arg_buf, **argv; |
c906108c SS |
611 | |
612 | if (exec_file == 0 || exec_bfd == 0) | |
8a3fe4f8 | 613 | warning (_("No executable file specified.")); |
db04efe6 | 614 | if (!sim_data->program_loaded) |
8a3fe4f8 | 615 | warning (_("No program loaded.")); |
c906108c | 616 | |
ea35711c | 617 | if (remote_debug) |
c906108c | 618 | printf_filtered ("gdbsim_create_inferior: exec_file \"%s\", args \"%s\"\n", |
c5aa993b | 619 | (exec_file ? exec_file : "(NULL)"), |
c906108c SS |
620 | args); |
621 | ||
db04efe6 | 622 | if (ptid_equal (inferior_ptid, sim_data->remote_sim_ptid)) |
7d85a9c0 | 623 | gdbsim_kill (target); |
c906108c SS |
624 | remove_breakpoints (); |
625 | init_wait_for_inferior (); | |
626 | ||
627 | if (exec_file != NULL) | |
628 | { | |
c5aa993b | 629 | len = strlen (exec_file) + 1 + strlen (args) + 1 + /*slop */ 10; |
c906108c SS |
630 | arg_buf = (char *) alloca (len); |
631 | arg_buf[0] = '\0'; | |
632 | strcat (arg_buf, exec_file); | |
633 | strcat (arg_buf, " "); | |
634 | strcat (arg_buf, args); | |
d1a41061 | 635 | argv = gdb_buildargv (arg_buf); |
7a292a7a | 636 | make_cleanup_freeargv (argv); |
c906108c SS |
637 | } |
638 | else | |
639 | argv = NULL; | |
db04efe6 | 640 | sim_create_inferior (sim_data->gdbsim_desc, exec_bfd, argv, env); |
c906108c | 641 | |
db04efe6 | 642 | inferior_ptid = sim_data->remote_sim_ptid; |
20176d8f | 643 | inferior_appeared (current_inferior (), ptid_get_pid (inferior_ptid)); |
9de2bdd7 PA |
644 | add_thread_silent (inferior_ptid); |
645 | ||
c5aa993b | 646 | insert_breakpoints (); /* Needed to get correct instruction in cache */ |
c906108c SS |
647 | |
648 | clear_proceed_status (); | |
c906108c SS |
649 | } |
650 | ||
651 | /* The open routine takes the rest of the parameters from the command, | |
652 | and (if successful) pushes a new target onto the stack. | |
653 | Targets should supply this routine, if only to provide an error message. */ | |
654 | /* Called when selecting the simulator. EG: (gdb) target sim name. */ | |
655 | ||
656 | static void | |
fba45db2 | 657 | gdbsim_open (char *args, int from_tty) |
c906108c SS |
658 | { |
659 | int len; | |
660 | char *arg_buf; | |
db04efe6 KB |
661 | struct sim_inferior_data *sim_data; |
662 | SIM_DESC gdbsim_desc; | |
c906108c | 663 | |
ea35711c | 664 | if (remote_debug) |
c906108c SS |
665 | printf_filtered ("gdbsim_open: args \"%s\"\n", args ? args : "(null)"); |
666 | ||
db04efe6 KB |
667 | /* Ensure that the sim target is not on the target stack. This is |
668 | necessary, because if it is on the target stack, the call to | |
669 | push_target below will invoke sim_close(), thus freeing various | |
670 | state (including a sim instance) that we allocate prior to | |
671 | invoking push_target(). We want to delay the push_target() | |
672 | operation until after we complete those operations which could | |
673 | error out. */ | |
674 | if (gdbsim_is_open) | |
c906108c SS |
675 | unpush_target (&gdbsim_ops); |
676 | ||
c5aa993b | 677 | len = (7 + 1 /* gdbsim */ |
c906108c SS |
678 | + strlen (" -E little") |
679 | + strlen (" --architecture=xxxxxxxxxx") | |
680 | + (args ? strlen (args) : 0) | |
c5aa993b | 681 | + 50) /* slack */ ; |
c906108c | 682 | arg_buf = (char *) alloca (len); |
c5aa993b | 683 | strcpy (arg_buf, "gdbsim"); /* 7 */ |
b6d373df DJ |
684 | /* Specify the byte order for the target when it is explicitly |
685 | specified by the user (not auto detected). */ | |
686 | switch (selected_byte_order ()) | |
c906108c | 687 | { |
a8cf2722 AC |
688 | case BFD_ENDIAN_BIG: |
689 | strcat (arg_buf, " -E big"); | |
690 | break; | |
691 | case BFD_ENDIAN_LITTLE: | |
692 | strcat (arg_buf, " -E little"); | |
693 | break; | |
694 | case BFD_ENDIAN_UNKNOWN: | |
695 | break; | |
c906108c SS |
696 | } |
697 | /* Specify the architecture of the target when it has been | |
698 | explicitly specified */ | |
a8cf2722 | 699 | if (selected_architecture_name () != NULL) |
c906108c SS |
700 | { |
701 | strcat (arg_buf, " --architecture="); | |
a8cf2722 | 702 | strcat (arg_buf, selected_architecture_name ()); |
c906108c SS |
703 | } |
704 | /* finally, any explicit args */ | |
705 | if (args) | |
706 | { | |
c5aa993b | 707 | strcat (arg_buf, " "); /* 1 */ |
c906108c SS |
708 | strcat (arg_buf, args); |
709 | } | |
db04efe6 | 710 | sim_argv = gdb_buildargv (arg_buf); |
c906108c SS |
711 | |
712 | init_callbacks (); | |
db04efe6 | 713 | gdbsim_desc = sim_open (SIM_OPEN_DEBUG, &gdb_callback, exec_bfd, sim_argv); |
c906108c SS |
714 | |
715 | if (gdbsim_desc == 0) | |
db04efe6 KB |
716 | { |
717 | freeargv (sim_argv); | |
718 | sim_argv = NULL; | |
719 | error (_("unable to create simulator instance")); | |
720 | } | |
721 | ||
722 | /* Reset the pid numberings for this batch of sim instances. */ | |
723 | next_pid = INITIAL_PID; | |
724 | ||
725 | /* Allocate the inferior data, but do not allocate a sim instance | |
726 | since we've already just done that. */ | |
727 | sim_data = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
728 | ||
729 | sim_data->gdbsim_desc = gdbsim_desc; | |
c906108c SS |
730 | |
731 | push_target (&gdbsim_ops); | |
c906108c | 732 | printf_filtered ("Connected to the simulator.\n"); |
52bb452f DJ |
733 | |
734 | /* There's nothing running after "target sim" or "load"; not until | |
735 | "run". */ | |
736 | inferior_ptid = null_ptid; | |
db04efe6 KB |
737 | |
738 | gdbsim_is_open = 1; | |
739 | } | |
740 | ||
741 | /* Callback for iterate_over_inferiors. Called (indirectly) by | |
742 | gdbsim_close(). */ | |
743 | ||
744 | static int | |
745 | gdbsim_close_inferior (struct inferior *inf, void *arg) | |
746 | { | |
747 | struct sim_inferior_data *sim_data = inferior_data (inf, | |
748 | sim_inferior_data_key); | |
749 | if (sim_data != NULL) | |
750 | { | |
751 | ptid_t ptid = sim_data->remote_sim_ptid; | |
752 | ||
753 | sim_inferior_data_cleanup (inf, sim_data); | |
754 | set_inferior_data (inf, sim_inferior_data_key, NULL); | |
755 | ||
756 | /* Having a ptid allocated and stored in remote_sim_ptid does | |
757 | not mean that a corresponding inferior was ever created. | |
758 | Thus we need to verify the existence of an inferior using the | |
759 | pid in question before setting inferior_ptid via | |
760 | switch_to_thread() or mourning the inferior. */ | |
761 | if (find_inferior_pid (ptid_get_pid (ptid)) != NULL) | |
762 | { | |
763 | switch_to_thread (ptid); | |
764 | generic_mourn_inferior (); | |
765 | } | |
766 | } | |
767 | ||
768 | return 0; | |
c906108c SS |
769 | } |
770 | ||
771 | /* Does whatever cleanup is required for a target that we are no longer | |
772 | going to be calling. Argument says whether we are quitting gdb and | |
773 | should not get hung in case of errors, or whether we want a clean | |
774 | termination even if it takes a while. This routine is automatically | |
775 | always called just before a routine is popped off the target stack. | |
776 | Closing file descriptors and freeing memory are typical things it should | |
777 | do. */ | |
778 | /* Close out all files and local state before this target loses control. */ | |
779 | ||
780 | static void | |
fba45db2 | 781 | gdbsim_close (int quitting) |
c906108c | 782 | { |
db04efe6 KB |
783 | struct sim_inferior_data *sim_data |
784 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
785 | ||
ea35711c | 786 | if (remote_debug) |
c906108c SS |
787 | printf_filtered ("gdbsim_close: quitting %d\n", quitting); |
788 | ||
db04efe6 | 789 | iterate_over_inferiors (gdbsim_close_inferior, NULL); |
c906108c | 790 | |
db04efe6 | 791 | if (sim_argv != NULL) |
c906108c | 792 | { |
db04efe6 KB |
793 | freeargv (sim_argv); |
794 | sim_argv = NULL; | |
c906108c SS |
795 | } |
796 | ||
797 | end_callbacks (); | |
db04efe6 KB |
798 | |
799 | gdbsim_is_open = 0; | |
c906108c SS |
800 | } |
801 | ||
802 | /* Takes a program previously attached to and detaches it. | |
803 | The program may resume execution (some targets do, some don't) and will | |
804 | no longer stop on signals, etc. We better not have left any breakpoints | |
805 | in the program or it'll die when it hits one. ARGS is arguments | |
806 | typed by the user (e.g. a signal to send the process). FROM_TTY | |
807 | says whether to be verbose or not. */ | |
808 | /* Terminate the open connection to the remote debugger. | |
809 | Use this when you want to detach and do something else with your gdb. */ | |
810 | ||
811 | static void | |
136d6dae | 812 | gdbsim_detach (struct target_ops *ops, char *args, int from_tty) |
c906108c | 813 | { |
ea35711c | 814 | if (remote_debug) |
c906108c SS |
815 | printf_filtered ("gdbsim_detach: args \"%s\"\n", args); |
816 | ||
817 | pop_target (); /* calls gdbsim_close to do the real work */ | |
818 | if (from_tty) | |
819 | printf_filtered ("Ending simulator %s debugging\n", target_shortname); | |
820 | } | |
c5aa993b | 821 | |
c906108c SS |
822 | /* Resume execution of the target process. STEP says whether to single-step |
823 | or to run free; SIGGNAL is the signal value (e.g. SIGINT) to be given | |
824 | to the target, or zero for no signal. */ | |
825 | ||
db04efe6 KB |
826 | struct resume_data |
827 | { | |
828 | enum target_signal siggnal; | |
829 | int step; | |
830 | }; | |
831 | ||
832 | static int | |
833 | gdbsim_resume_inferior (struct inferior *inf, void *arg) | |
834 | { | |
835 | struct sim_inferior_data *sim_data | |
836 | = get_sim_inferior_data (inf, SIM_INSTANCE_NOT_NEEDED); | |
837 | struct resume_data *rd = arg; | |
838 | ||
839 | if (sim_data) | |
840 | { | |
841 | sim_data->resume_siggnal = rd->siggnal; | |
842 | sim_data->resume_step = rd->step; | |
843 | ||
844 | if (remote_debug) | |
845 | printf_filtered (_("gdbsim_resume: pid %d, step %d, signal %d\n"), | |
846 | inf->pid, rd->step, rd->siggnal); | |
847 | } | |
848 | ||
849 | /* When called from iterate_over_inferiors, a zero return causes the | |
850 | iteration process to proceed until there are no more inferiors to | |
851 | consider. */ | |
852 | return 0; | |
853 | } | |
c906108c SS |
854 | |
855 | static void | |
2fb89e62 PA |
856 | gdbsim_resume (struct target_ops *ops, |
857 | ptid_t ptid, int step, enum target_signal siggnal) | |
c906108c | 858 | { |
db04efe6 KB |
859 | struct resume_data rd; |
860 | struct sim_inferior_data *sim_data | |
861 | = get_sim_inferior_data_by_ptid (ptid, SIM_INSTANCE_NOT_NEEDED); | |
862 | ||
863 | rd.siggnal = siggnal; | |
864 | rd.step = step; | |
865 | ||
866 | /* We don't access any sim_data members within this function. | |
867 | What's of interest is whether or not the call to | |
868 | get_sim_inferior_data_by_ptid(), above, is able to obtain a | |
869 | non-NULL pointer. If it managed to obtain a non-NULL pointer, we | |
870 | know we have a single inferior to consider. If it's NULL, we | |
871 | either have multiple inferiors to resume or an error condition. */ | |
872 | ||
873 | if (sim_data) | |
874 | gdbsim_resume_inferior (find_inferior_pid (ptid_get_pid (ptid)), &rd); | |
875 | else if (ptid_equal (ptid, minus_one_ptid)) | |
876 | iterate_over_inferiors (gdbsim_resume_inferior, &rd); | |
877 | else | |
8a3fe4f8 | 878 | error (_("The program is not being run.")); |
c906108c SS |
879 | } |
880 | ||
881 | /* Notify the simulator of an asynchronous request to stop. | |
c5aa993b | 882 | |
c906108c SS |
883 | The simulator shall ensure that the stop request is eventually |
884 | delivered to the simulator. If the call is made while the | |
885 | simulator is not running then the stop request is processed when | |
886 | the simulator is next resumed. | |
887 | ||
db04efe6 KB |
888 | For simulators that do not support this operation, just abort. */ |
889 | ||
890 | static int | |
891 | gdbsim_stop_inferior (struct inferior *inf, void *arg) | |
892 | { | |
893 | struct sim_inferior_data *sim_data | |
894 | = get_sim_inferior_data (inf, SIM_INSTANCE_NEEDED); | |
895 | ||
896 | if (sim_data) | |
897 | { | |
898 | if (!sim_stop (sim_data->gdbsim_desc)) | |
899 | { | |
900 | quit (); | |
901 | } | |
902 | } | |
903 | ||
904 | /* When called from iterate_over_inferiors, a zero return causes the | |
905 | iteration process to proceed until there are no more inferiors to | |
906 | consider. */ | |
907 | return 0; | |
908 | } | |
c906108c SS |
909 | |
910 | static void | |
f9c72d52 | 911 | gdbsim_stop (ptid_t ptid) |
c906108c | 912 | { |
db04efe6 KB |
913 | struct sim_inferior_data *sim_data; |
914 | ||
915 | if (ptid_equal (ptid, minus_one_ptid)) | |
c906108c | 916 | { |
db04efe6 KB |
917 | iterate_over_inferiors (gdbsim_stop_inferior, NULL); |
918 | } | |
919 | else | |
920 | { | |
921 | struct inferior *inf = find_inferior_pid (ptid_get_pid (ptid)); | |
922 | ||
923 | if (inf == NULL) | |
924 | error (_("Can't stop pid %d. No inferior found."), ptid_get_pid (ptid)); | |
925 | ||
926 | gdbsim_stop_inferior (inf, NULL); | |
c906108c SS |
927 | } |
928 | } | |
929 | ||
930 | /* GDB version of os_poll_quit callback. | |
8a0ce09a | 931 | Taken from gdb/util.c - should be in a library. */ |
c906108c SS |
932 | |
933 | static int | |
fba45db2 | 934 | gdb_os_poll_quit (host_callback *p) |
c906108c | 935 | { |
98bbd631 AC |
936 | if (deprecated_ui_loop_hook != NULL) |
937 | deprecated_ui_loop_hook (0); | |
7a292a7a | 938 | |
c5aa993b | 939 | if (quit_flag) /* gdb's idea of quit */ |
c906108c | 940 | { |
c5aa993b | 941 | quit_flag = 0; /* we've stolen it */ |
c906108c SS |
942 | return 1; |
943 | } | |
944 | else if (immediate_quit) | |
945 | { | |
946 | return 1; | |
947 | } | |
948 | return 0; | |
949 | } | |
950 | ||
951 | /* Wait for inferior process to do something. Return pid of child, | |
952 | or -1 in case of error; store status through argument pointer STATUS, | |
953 | just as `wait' would. */ | |
954 | ||
955 | static void | |
fba45db2 | 956 | gdbsim_cntrl_c (int signo) |
c906108c | 957 | { |
db04efe6 | 958 | gdbsim_stop (minus_one_ptid); |
c906108c SS |
959 | } |
960 | ||
39f77062 | 961 | static ptid_t |
117de6a9 | 962 | gdbsim_wait (struct target_ops *ops, |
47608cb1 | 963 | ptid_t ptid, struct target_waitstatus *status, int options) |
c906108c | 964 | { |
db04efe6 | 965 | struct sim_inferior_data *sim_data; |
c906108c SS |
966 | static RETSIGTYPE (*prev_sigint) (); |
967 | int sigrc = 0; | |
968 | enum sim_stop reason = sim_running; | |
969 | ||
db04efe6 KB |
970 | /* This target isn't able to (yet) resume more than one inferior at a time. |
971 | When ptid is minus_one_ptid, just use the current inferior. If we're | |
972 | given an explicit pid, we'll try to find it and use that instead. */ | |
973 | if (ptid_equal (ptid, minus_one_ptid)) | |
974 | sim_data = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NEEDED); | |
975 | else | |
976 | { | |
977 | sim_data = get_sim_inferior_data_by_ptid (ptid, SIM_INSTANCE_NEEDED); | |
978 | if (sim_data == NULL) | |
979 | error (_("Unable to wait for pid %d. Inferior not found."), | |
980 | ptid_get_pid (ptid)); | |
981 | inferior_ptid = ptid; | |
982 | } | |
983 | ||
ea35711c | 984 | if (remote_debug) |
c906108c SS |
985 | printf_filtered ("gdbsim_wait\n"); |
986 | ||
987 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) | |
988 | { | |
989 | struct sigaction sa, osa; | |
990 | sa.sa_handler = gdbsim_cntrl_c; | |
991 | sigemptyset (&sa.sa_mask); | |
992 | sa.sa_flags = 0; | |
993 | sigaction (SIGINT, &sa, &osa); | |
994 | prev_sigint = osa.sa_handler; | |
995 | } | |
996 | #else | |
997 | prev_sigint = signal (SIGINT, gdbsim_cntrl_c); | |
998 | #endif | |
db04efe6 KB |
999 | sim_resume (sim_data->gdbsim_desc, sim_data->resume_step, |
1000 | sim_data->resume_siggnal); | |
1001 | ||
c906108c | 1002 | signal (SIGINT, prev_sigint); |
db04efe6 | 1003 | sim_data->resume_step = 0; |
c906108c | 1004 | |
db04efe6 | 1005 | sim_stop_reason (sim_data->gdbsim_desc, &reason, &sigrc); |
c906108c SS |
1006 | |
1007 | switch (reason) | |
1008 | { | |
1009 | case sim_exited: | |
1010 | status->kind = TARGET_WAITKIND_EXITED; | |
1011 | status->value.integer = sigrc; | |
1012 | break; | |
1013 | case sim_stopped: | |
1014 | switch (sigrc) | |
1015 | { | |
aba6488e | 1016 | case TARGET_SIGNAL_ABRT: |
c906108c SS |
1017 | quit (); |
1018 | break; | |
aba6488e MM |
1019 | case TARGET_SIGNAL_INT: |
1020 | case TARGET_SIGNAL_TRAP: | |
c906108c SS |
1021 | default: |
1022 | status->kind = TARGET_WAITKIND_STOPPED; | |
aba6488e | 1023 | status->value.sig = sigrc; |
c906108c SS |
1024 | break; |
1025 | } | |
1026 | break; | |
1027 | case sim_signalled: | |
1028 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
aba6488e | 1029 | status->value.sig = sigrc; |
c906108c SS |
1030 | break; |
1031 | case sim_running: | |
1032 | case sim_polling: | |
1033 | /* FIXME: Is this correct? */ | |
1034 | break; | |
1035 | } | |
1036 | ||
39f77062 | 1037 | return inferior_ptid; |
c906108c SS |
1038 | } |
1039 | ||
1040 | /* Get ready to modify the registers array. On machines which store | |
1041 | individual registers, this doesn't need to do anything. On machines | |
1042 | which store all the registers in one fell swoop, this makes sure | |
1043 | that registers contains all the registers from the program being | |
1044 | debugged. */ | |
1045 | ||
1046 | static void | |
316f2060 | 1047 | gdbsim_prepare_to_store (struct regcache *regcache) |
c906108c SS |
1048 | { |
1049 | /* Do nothing, since we can store individual regs */ | |
1050 | } | |
1051 | ||
d93bce06 KB |
1052 | /* Transfer LEN bytes between GDB address MYADDR and target address |
1053 | MEMADDR. If WRITE is non-zero, transfer them to the target, | |
1054 | otherwise transfer them from the target. TARGET is unused. | |
1055 | ||
1056 | Returns the number of bytes transferred. */ | |
1057 | ||
c906108c | 1058 | static int |
8d7337bf | 1059 | gdbsim_xfer_inferior_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, |
0a65a603 AC |
1060 | int write, struct mem_attrib *attrib, |
1061 | struct target_ops *target) | |
c906108c | 1062 | { |
db04efe6 KB |
1063 | struct sim_inferior_data *sim_data |
1064 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
1065 | ||
0c012db1 KB |
1066 | /* If this target doesn't have memory yet, return 0 causing the |
1067 | request to be passed to a lower target, hopefully an exec | |
1068 | file. */ | |
1069 | if (!target->to_has_memory (target)) | |
52bb452f DJ |
1070 | return 0; |
1071 | ||
db04efe6 | 1072 | if (!sim_data->program_loaded) |
8a3fe4f8 | 1073 | error (_("No program loaded.")); |
c906108c | 1074 | |
db04efe6 KB |
1075 | /* Note that we obtained the sim_data pointer above using |
1076 | SIM_INSTANCE_NOT_NEEDED. We do this so that we don't needlessly | |
1077 | allocate a sim instance prior to loading a program. If we | |
1078 | get to this point in the code though, gdbsim_desc should be | |
1079 | non-NULL. (Note that a sim instance is needed in order to load | |
1080 | the program...) */ | |
1081 | gdb_assert (sim_data->gdbsim_desc != NULL); | |
1082 | ||
ea35711c | 1083 | if (remote_debug) |
c906108c | 1084 | { |
d4f3574e SS |
1085 | /* FIXME: Send to something other than STDOUT? */ |
1086 | printf_filtered ("gdbsim_xfer_inferior_memory: myaddr 0x"); | |
1087 | gdb_print_host_address (myaddr, gdb_stdout); | |
5af949e3 UW |
1088 | printf_filtered (", memaddr %s, len %d, write %d\n", |
1089 | paddress (target_gdbarch, memaddr), len, write); | |
ea35711c | 1090 | if (remote_debug && write) |
c5aa993b | 1091 | dump_mem (myaddr, len); |
c906108c SS |
1092 | } |
1093 | ||
1094 | if (write) | |
1095 | { | |
db04efe6 | 1096 | len = sim_write (sim_data->gdbsim_desc, memaddr, myaddr, len); |
c906108c | 1097 | } |
c5aa993b | 1098 | else |
c906108c | 1099 | { |
db04efe6 | 1100 | len = sim_read (sim_data->gdbsim_desc, memaddr, myaddr, len); |
ea35711c | 1101 | if (remote_debug && len > 0) |
c5aa993b JM |
1102 | dump_mem (myaddr, len); |
1103 | } | |
c906108c SS |
1104 | return len; |
1105 | } | |
1106 | ||
1107 | static void | |
fba45db2 | 1108 | gdbsim_files_info (struct target_ops *target) |
c906108c | 1109 | { |
db04efe6 KB |
1110 | struct sim_inferior_data *sim_data |
1111 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NEEDED); | |
0d18d720 | 1112 | const char *file = "nothing"; |
c906108c SS |
1113 | |
1114 | if (exec_bfd) | |
1115 | file = bfd_get_filename (exec_bfd); | |
1116 | ||
ea35711c | 1117 | if (remote_debug) |
c906108c SS |
1118 | printf_filtered ("gdbsim_files_info: file \"%s\"\n", file); |
1119 | ||
1120 | if (exec_bfd) | |
1121 | { | |
1122 | printf_filtered ("\tAttached to %s running program %s\n", | |
1123 | target_shortname, file); | |
db04efe6 | 1124 | sim_info (sim_data->gdbsim_desc, 0); |
c906108c SS |
1125 | } |
1126 | } | |
1127 | ||
1128 | /* Clear the simulator's notion of what the break points are. */ | |
1129 | ||
1130 | static void | |
3c8b2eda | 1131 | gdbsim_mourn_inferior (struct target_ops *target) |
c5aa993b | 1132 | { |
db04efe6 KB |
1133 | struct sim_inferior_data *sim_data |
1134 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
1135 | ||
ea35711c | 1136 | if (remote_debug) |
c906108c SS |
1137 | printf_filtered ("gdbsim_mourn_inferior:\n"); |
1138 | ||
1139 | remove_breakpoints (); | |
1140 | generic_mourn_inferior (); | |
db04efe6 | 1141 | delete_thread_silent (sim_data->remote_sim_ptid); |
c906108c SS |
1142 | } |
1143 | ||
c906108c SS |
1144 | /* Pass the command argument through to the simulator verbatim. The |
1145 | simulator must do any command interpretation work. */ | |
1146 | ||
1147 | void | |
fba45db2 | 1148 | simulator_command (char *args, int from_tty) |
c906108c | 1149 | { |
db04efe6 KB |
1150 | struct sim_inferior_data *sim_data; |
1151 | ||
1152 | /* We use inferior_data() instead of get_sim_inferior_data() here in | |
1153 | order to avoid attaching a sim_inferior_data struct to an | |
1154 | inferior unnecessarily. The reason we take such care here is due | |
1155 | to the fact that this function, simulator_command(), may be called | |
1156 | even when the sim target is not active. If we were to use | |
1157 | get_sim_inferior_data() here, it is possible that this call would | |
1158 | be made either prior to gdbsim_open() or after gdbsim_close(), | |
1159 | thus allocating memory that would not be garbage collected until | |
1160 | the ultimate destruction of the associated inferior. */ | |
1161 | ||
1162 | sim_data = inferior_data (current_inferior (), sim_inferior_data_key); | |
1163 | if (sim_data == NULL || sim_data->gdbsim_desc == NULL) | |
c906108c SS |
1164 | { |
1165 | ||
1166 | /* PREVIOUSLY: The user may give a command before the simulator | |
1167 | is opened. [...] (??? assuming of course one wishes to | |
1168 | continue to allow commands to be sent to unopened simulators, | |
1169 | which isn't entirely unreasonable). */ | |
1170 | ||
1171 | /* The simulator is a builtin abstraction of a remote target. | |
1172 | Consistent with that model, access to the simulator, via sim | |
1173 | commands, is restricted to the period when the channel to the | |
1174 | simulator is open. */ | |
1175 | ||
8a3fe4f8 | 1176 | error (_("Not connected to the simulator target")); |
c906108c SS |
1177 | } |
1178 | ||
db04efe6 | 1179 | sim_do_command (sim_data->gdbsim_desc, args); |
c906108c SS |
1180 | |
1181 | /* Invalidate the register cache, in case the simulator command does | |
1182 | something funny. */ | |
c5aa993b | 1183 | registers_changed (); |
c906108c SS |
1184 | } |
1185 | ||
9de2bdd7 PA |
1186 | /* Check to see if a thread is still alive. */ |
1187 | ||
1188 | static int | |
28439f5e | 1189 | gdbsim_thread_alive (struct target_ops *ops, ptid_t ptid) |
9de2bdd7 | 1190 | { |
db04efe6 KB |
1191 | struct sim_inferior_data *sim_data |
1192 | = get_sim_inferior_data_by_ptid (ptid, SIM_INSTANCE_NOT_NEEDED); | |
1193 | ||
1194 | if (sim_data == NULL) | |
1195 | return 0; | |
1196 | ||
1197 | if (ptid_equal (ptid, sim_data->remote_sim_ptid)) | |
9de2bdd7 PA |
1198 | /* The simulators' task is always alive. */ |
1199 | return 1; | |
1200 | ||
1201 | return 0; | |
1202 | } | |
1203 | ||
1204 | /* Convert a thread ID to a string. Returns the string in a static | |
1205 | buffer. */ | |
1206 | ||
1207 | static char * | |
117de6a9 | 1208 | gdbsim_pid_to_str (struct target_ops *ops, ptid_t ptid) |
9de2bdd7 | 1209 | { |
9de2bdd7 PA |
1210 | return normal_pid_to_str (ptid); |
1211 | } | |
1212 | ||
0c012db1 KB |
1213 | /* Simulator memory may be accessed after the program has been loaded. */ |
1214 | ||
1215 | int | |
1216 | gdbsim_has_all_memory (struct target_ops *ops) | |
1217 | { | |
1218 | struct sim_inferior_data *sim_data | |
1219 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
1220 | ||
1221 | if (!sim_data->program_loaded) | |
1222 | return 0; | |
1223 | ||
1224 | return 1; | |
1225 | } | |
1226 | ||
1227 | int | |
1228 | gdbsim_has_memory (struct target_ops *ops) | |
1229 | { | |
1230 | struct sim_inferior_data *sim_data | |
1231 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
1232 | ||
1233 | if (!sim_data->program_loaded) | |
1234 | return 0; | |
1235 | ||
1236 | return 1; | |
1237 | } | |
1238 | ||
c906108c SS |
1239 | /* Define the target subroutine names */ |
1240 | ||
c5aa993b JM |
1241 | struct target_ops gdbsim_ops; |
1242 | ||
1243 | static void | |
1244 | init_gdbsim_ops (void) | |
1245 | { | |
1246 | gdbsim_ops.to_shortname = "sim"; | |
1247 | gdbsim_ops.to_longname = "simulator"; | |
1248 | gdbsim_ops.to_doc = "Use the compiled-in simulator."; | |
1249 | gdbsim_ops.to_open = gdbsim_open; | |
1250 | gdbsim_ops.to_close = gdbsim_close; | |
c5aa993b | 1251 | gdbsim_ops.to_detach = gdbsim_detach; |
c5aa993b JM |
1252 | gdbsim_ops.to_resume = gdbsim_resume; |
1253 | gdbsim_ops.to_wait = gdbsim_wait; | |
c5aa993b JM |
1254 | gdbsim_ops.to_fetch_registers = gdbsim_fetch_register; |
1255 | gdbsim_ops.to_store_registers = gdbsim_store_register; | |
1256 | gdbsim_ops.to_prepare_to_store = gdbsim_prepare_to_store; | |
c8e73a31 | 1257 | gdbsim_ops.deprecated_xfer_memory = gdbsim_xfer_inferior_memory; |
c5aa993b | 1258 | gdbsim_ops.to_files_info = gdbsim_files_info; |
8181d85f DJ |
1259 | gdbsim_ops.to_insert_breakpoint = memory_insert_breakpoint; |
1260 | gdbsim_ops.to_remove_breakpoint = memory_remove_breakpoint; | |
c5aa993b JM |
1261 | gdbsim_ops.to_kill = gdbsim_kill; |
1262 | gdbsim_ops.to_load = gdbsim_load; | |
c5aa993b | 1263 | gdbsim_ops.to_create_inferior = gdbsim_create_inferior; |
c5aa993b | 1264 | gdbsim_ops.to_mourn_inferior = gdbsim_mourn_inferior; |
c5aa993b | 1265 | gdbsim_ops.to_stop = gdbsim_stop; |
9de2bdd7 PA |
1266 | gdbsim_ops.to_thread_alive = gdbsim_thread_alive; |
1267 | gdbsim_ops.to_pid_to_str = gdbsim_pid_to_str; | |
c5aa993b | 1268 | gdbsim_ops.to_stratum = process_stratum; |
0c012db1 KB |
1269 | gdbsim_ops.to_has_all_memory = gdbsim_has_all_memory; |
1270 | gdbsim_ops.to_has_memory = gdbsim_has_memory; | |
c35b1492 PA |
1271 | gdbsim_ops.to_has_stack = default_child_has_stack; |
1272 | gdbsim_ops.to_has_registers = default_child_has_registers; | |
1273 | gdbsim_ops.to_has_execution = default_child_has_execution; | |
c5aa993b | 1274 | gdbsim_ops.to_magic = OPS_MAGIC; |
c906108c SS |
1275 | } |
1276 | ||
1277 | void | |
fba45db2 | 1278 | _initialize_remote_sim (void) |
c906108c | 1279 | { |
c5aa993b | 1280 | init_gdbsim_ops (); |
c906108c SS |
1281 | add_target (&gdbsim_ops); |
1282 | ||
24ec834b | 1283 | add_com ("sim", class_obscure, simulator_command, |
1bedd215 | 1284 | _("Send a command to the simulator.")); |
9de2bdd7 | 1285 | |
db04efe6 KB |
1286 | sim_inferior_data_key |
1287 | = register_inferior_data_with_cleanup (sim_inferior_data_cleanup); | |
c906108c | 1288 | } |