Commit | Line | Data |
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c906108c | 1 | /* Generic remote debugging interface for simulators. |
0a65a603 | 2 | |
61baf725 | 3 | Copyright (C) 1993-2017 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" | |
23bf70af | 24 | #include "gdb_bfd.h" |
c906108c | 25 | #include "inferior.h" |
45741a9c | 26 | #include "infrun.h" |
c906108c | 27 | #include "value.h" |
c906108c SS |
28 | #include <ctype.h> |
29 | #include <fcntl.h> | |
30 | #include <signal.h> | |
31 | #include <setjmp.h> | |
c906108c SS |
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 | 39 | #include "sim-regno.h" |
a8cf2722 | 40 | #include "arch-utils.h" |
1986bccd | 41 | #include "readline/readline.h" |
9de2bdd7 | 42 | #include "gdbthread.h" |
c906108c SS |
43 | |
44 | /* Prototypes */ | |
45 | ||
a14ed312 | 46 | extern void _initialize_remote_sim (void); |
392a587b | 47 | |
a14ed312 | 48 | static void init_callbacks (void); |
c906108c | 49 | |
a14ed312 | 50 | static void end_callbacks (void); |
c906108c | 51 | |
a14ed312 | 52 | static int gdb_os_write_stdout (host_callback *, const char *, int); |
c906108c | 53 | |
a14ed312 | 54 | static void gdb_os_flush_stdout (host_callback *); |
c906108c | 55 | |
a14ed312 | 56 | static int gdb_os_write_stderr (host_callback *, const char *, int); |
c906108c | 57 | |
a14ed312 | 58 | static void gdb_os_flush_stderr (host_callback *); |
c906108c | 59 | |
a14ed312 | 60 | static int gdb_os_poll_quit (host_callback *); |
c906108c | 61 | |
0df8b418 | 62 | /* printf_filtered is depreciated. */ |
a14ed312 | 63 | static void gdb_os_printf_filtered (host_callback *, const char *, ...); |
c906108c | 64 | |
a14ed312 | 65 | static void gdb_os_vprintf_filtered (host_callback *, const char *, va_list); |
c906108c | 66 | |
a14ed312 | 67 | static void gdb_os_evprintf_filtered (host_callback *, const char *, va_list); |
c906108c | 68 | |
c25c4a8b JK |
69 | static void gdb_os_error (host_callback *, const char *, ...) |
70 | ATTRIBUTE_NORETURN; | |
c906108c | 71 | |
7d85a9c0 | 72 | static void gdbsim_kill (struct target_ops *); |
c906108c | 73 | |
9cbe5fff TT |
74 | static void gdbsim_load (struct target_ops *self, const char *prog, |
75 | int fromtty); | |
c906108c | 76 | |
74228e77 | 77 | static void gdbsim_open (const 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 | |
bfedc46a | 91 | static void gdbsim_interrupt (struct target_ops *self, 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; | |
653090d3 | 155 | SIM_DESC new_sim_desc = (SIM_DESC) arg; |
db04efe6 | 156 | |
653090d3 SM |
157 | sim_data = ((struct sim_inferior_data *) |
158 | inferior_data (inf, sim_inferior_data_key)); | |
db04efe6 KB |
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 | |
653090d3 | 176 | = (struct sim_inferior_data *) inferior_data (inf, sim_inferior_data_key); |
db04efe6 KB |
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. */ | |
74228e77 | 182 | if (sim_instance_needed == SIM_INSTANCE_NEEDED |
db04efe6 KB |
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, | |
74228e77 | 192 | sim_desc); |
db04efe6 KB |
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.)"), | |
74228e77 RM |
205 | inf->num, idup->num); |
206 | } | |
db04efe6 KB |
207 | } |
208 | ||
209 | if (sim_data == NULL) | |
210 | { | |
41bf6aca | 211 | sim_data = XCNEW(struct sim_inferior_data); |
db04efe6 KB |
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; | |
a493e3e2 | 221 | sim_data->resume_siggnal = GDB_SIGNAL_0; |
db04efe6 KB |
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 | |
74228e77 | 227 | needing a sim instance. */ |
db04efe6 KB |
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; | |
74228e77 | 247 | |
db04efe6 KB |
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 | { | |
653090d3 | 261 | struct sim_inferior_data *sim_data = (struct sim_inferior_data *) data; |
db04efe6 KB |
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 |
146ec4db | 275 | dump_mem (const gdb_byte *buf, int len) |
c906108c | 276 | { |
1385f66c | 277 | fputs_unfiltered ("\t", gdb_stdlog); |
3d468296 AB |
278 | |
279 | if (len == 8 || len == 4) | |
c906108c | 280 | { |
3d468296 | 281 | uint32_t l[2]; |
123f5f96 | 282 | |
3d468296 | 283 | memcpy (l, buf, len); |
1385f66c | 284 | fprintf_unfiltered (gdb_stdlog, "0x%08x", l[0]); |
3d468296 | 285 | if (len == 8) |
1385f66c | 286 | fprintf_unfiltered (gdb_stdlog, " 0x%08x", l[1]); |
3d468296 AB |
287 | } |
288 | else | |
289 | { | |
290 | int i; | |
123f5f96 | 291 | |
3d468296 | 292 | for (i = 0; i < len; i++) |
1385f66c | 293 | fprintf_unfiltered (gdb_stdlog, "0x%02x ", buf[i]); |
c906108c | 294 | } |
3d468296 | 295 | |
1385f66c | 296 | fputs_unfiltered ("\n", gdb_stdlog); |
c906108c SS |
297 | } |
298 | ||
c906108c SS |
299 | /* Initialize gdb_callback. */ |
300 | ||
301 | static void | |
fba45db2 | 302 | init_callbacks (void) |
c906108c | 303 | { |
c5aa993b | 304 | if (!callbacks_initialized) |
c906108c SS |
305 | { |
306 | gdb_callback = default_callback; | |
307 | gdb_callback.init (&gdb_callback); | |
308 | gdb_callback.write_stdout = gdb_os_write_stdout; | |
309 | gdb_callback.flush_stdout = gdb_os_flush_stdout; | |
310 | gdb_callback.write_stderr = gdb_os_write_stderr; | |
311 | gdb_callback.flush_stderr = gdb_os_flush_stderr; | |
312 | gdb_callback.printf_filtered = gdb_os_printf_filtered; | |
313 | gdb_callback.vprintf_filtered = gdb_os_vprintf_filtered; | |
314 | gdb_callback.evprintf_filtered = gdb_os_evprintf_filtered; | |
315 | gdb_callback.error = gdb_os_error; | |
316 | gdb_callback.poll_quit = gdb_os_poll_quit; | |
317 | gdb_callback.magic = HOST_CALLBACK_MAGIC; | |
318 | callbacks_initialized = 1; | |
319 | } | |
320 | } | |
321 | ||
322 | /* Release callbacks (free resources used by them). */ | |
323 | ||
324 | static void | |
fba45db2 | 325 | end_callbacks (void) |
c906108c SS |
326 | { |
327 | if (callbacks_initialized) | |
328 | { | |
329 | gdb_callback.shutdown (&gdb_callback); | |
330 | callbacks_initialized = 0; | |
331 | } | |
332 | } | |
333 | ||
334 | /* GDB version of os_write_stdout callback. */ | |
335 | ||
c5aa993b | 336 | static int |
fba45db2 | 337 | gdb_os_write_stdout (host_callback *p, const char *buf, int len) |
c906108c SS |
338 | { |
339 | int i; | |
340 | char b[2]; | |
341 | ||
d9fcf2fb | 342 | ui_file_write (gdb_stdtarg, buf, len); |
c906108c SS |
343 | return len; |
344 | } | |
345 | ||
346 | /* GDB version of os_flush_stdout callback. */ | |
347 | ||
348 | static void | |
fba45db2 | 349 | gdb_os_flush_stdout (host_callback *p) |
c906108c | 350 | { |
4ce44c66 | 351 | gdb_flush (gdb_stdtarg); |
c906108c SS |
352 | } |
353 | ||
354 | /* GDB version of os_write_stderr callback. */ | |
355 | ||
c5aa993b | 356 | static int |
fba45db2 | 357 | gdb_os_write_stderr (host_callback *p, const char *buf, int len) |
c906108c SS |
358 | { |
359 | int i; | |
360 | char b[2]; | |
361 | ||
c5aa993b | 362 | for (i = 0; i < len; i++) |
c906108c SS |
363 | { |
364 | b[0] = buf[i]; | |
365 | b[1] = 0; | |
22e8e3c7 | 366 | fputs_unfiltered (b, gdb_stdtargerr); |
c906108c SS |
367 | } |
368 | return len; | |
369 | } | |
370 | ||
371 | /* GDB version of os_flush_stderr callback. */ | |
372 | ||
373 | static void | |
fba45db2 | 374 | gdb_os_flush_stderr (host_callback *p) |
c906108c | 375 | { |
22e8e3c7 | 376 | gdb_flush (gdb_stdtargerr); |
c906108c SS |
377 | } |
378 | ||
379 | /* GDB version of printf_filtered callback. */ | |
380 | ||
c906108c | 381 | static void |
c5aa993b | 382 | gdb_os_printf_filtered (host_callback * p, const char *format,...) |
c906108c SS |
383 | { |
384 | va_list args; | |
c906108c | 385 | |
123f5f96 | 386 | va_start (args, format); |
c906108c | 387 | vfprintf_filtered (gdb_stdout, format, args); |
c906108c SS |
388 | va_end (args); |
389 | } | |
390 | ||
391 | /* GDB version of error vprintf_filtered. */ | |
392 | ||
c906108c | 393 | static void |
c5aa993b | 394 | gdb_os_vprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c SS |
395 | { |
396 | vfprintf_filtered (gdb_stdout, format, ap); | |
397 | } | |
398 | ||
399 | /* GDB version of error evprintf_filtered. */ | |
400 | ||
c906108c | 401 | static void |
c5aa993b | 402 | gdb_os_evprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c SS |
403 | { |
404 | vfprintf_filtered (gdb_stderr, format, ap); | |
405 | } | |
406 | ||
407 | /* GDB version of error callback. */ | |
408 | ||
c906108c | 409 | static void |
58d4abe1 | 410 | gdb_os_error (host_callback * p, const char *format, ...) |
c906108c | 411 | { |
58d4abe1 | 412 | va_list args; |
123f5f96 | 413 | |
58d4abe1 PA |
414 | va_start (args, format); |
415 | verror (format, args); | |
416 | va_end (args); | |
c906108c SS |
417 | } |
418 | ||
8238d0bf | 419 | int |
e7faf938 | 420 | one2one_register_sim_regno (struct gdbarch *gdbarch, int regnum) |
8238d0bf AC |
421 | { |
422 | /* Only makes sense to supply raw registers. */ | |
e7faf938 | 423 | gdb_assert (regnum >= 0 && regnum < gdbarch_num_regs (gdbarch)); |
8238d0bf AC |
424 | return regnum; |
425 | } | |
426 | ||
c906108c | 427 | static void |
28439f5e PA |
428 | gdbsim_fetch_register (struct target_ops *ops, |
429 | struct regcache *regcache, int regno) | |
c906108c | 430 | { |
40a6adc1 | 431 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
bcc0c096 | 432 | struct inferior *inf = find_inferior_ptid (regcache_get_ptid (regcache)); |
db04efe6 | 433 | struct sim_inferior_data *sim_data |
bcc0c096 | 434 | = get_sim_inferior_data (inf, SIM_INSTANCE_NEEDED); |
123f5f96 | 435 | |
c5aa993b | 436 | if (regno == -1) |
c906108c | 437 | { |
40a6adc1 | 438 | for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++) |
28439f5e | 439 | gdbsim_fetch_register (ops, regcache, regno); |
8238d0bf | 440 | return; |
c906108c | 441 | } |
8238d0bf | 442 | |
40a6adc1 | 443 | switch (gdbarch_register_sim_regno (gdbarch, regno)) |
c906108c | 444 | { |
8238d0bf AC |
445 | case LEGACY_SIM_REGNO_IGNORE: |
446 | break; | |
447 | case SIM_REGNO_DOES_NOT_EXIST: | |
448 | { | |
449 | /* For moment treat a `does not exist' register the same way | |
74228e77 | 450 | as an ``unavailable'' register. */ |
e362b510 | 451 | gdb_byte buf[MAX_REGISTER_SIZE]; |
8238d0bf | 452 | int nr_bytes; |
123f5f96 | 453 | |
d9d9c31f | 454 | memset (buf, 0, MAX_REGISTER_SIZE); |
56be3814 | 455 | regcache_raw_supply (regcache, regno, buf); |
8238d0bf AC |
456 | break; |
457 | } | |
74228e77 | 458 | |
8238d0bf AC |
459 | default: |
460 | { | |
461 | static int warn_user = 1; | |
e362b510 | 462 | gdb_byte buf[MAX_REGISTER_SIZE]; |
8238d0bf | 463 | int nr_bytes; |
123f5f96 | 464 | |
40a6adc1 | 465 | gdb_assert (regno >= 0 && regno < gdbarch_num_regs (gdbarch)); |
d9d9c31f | 466 | memset (buf, 0, MAX_REGISTER_SIZE); |
db04efe6 | 467 | nr_bytes = sim_fetch_register (sim_data->gdbsim_desc, |
474c1661 | 468 | gdbarch_register_sim_regno |
40a6adc1 | 469 | (gdbarch, regno), |
474c1661 | 470 | buf, |
40a6adc1 MD |
471 | register_size (gdbarch, regno)); |
472 | if (nr_bytes > 0 | |
473 | && nr_bytes != register_size (gdbarch, regno) && warn_user) | |
8238d0bf AC |
474 | { |
475 | fprintf_unfiltered (gdb_stderr, | |
0df8b418 MS |
476 | "Size of register %s (%d/%d) " |
477 | "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 | 492 | { |
1385f66c PA |
493 | fprintf_unfiltered (gdb_stdlog, |
494 | "gdbsim_fetch_register: %d", regno); | |
8238d0bf | 495 | /* FIXME: We could print something more intelligible. */ |
40a6adc1 | 496 | dump_mem (buf, register_size (gdbarch, regno)); |
8238d0bf AC |
497 | } |
498 | break; | |
499 | } | |
c906108c SS |
500 | } |
501 | } | |
502 | ||
503 | ||
504 | static void | |
28439f5e PA |
505 | gdbsim_store_register (struct target_ops *ops, |
506 | struct regcache *regcache, int regno) | |
c906108c | 507 | { |
40a6adc1 | 508 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
bcc0c096 | 509 | struct inferior *inf = find_inferior_ptid (regcache_get_ptid (regcache)); |
db04efe6 | 510 | struct sim_inferior_data *sim_data |
bcc0c096 | 511 | = get_sim_inferior_data (inf, SIM_INSTANCE_NEEDED); |
db04efe6 | 512 | |
c5aa993b | 513 | if (regno == -1) |
c906108c | 514 | { |
40a6adc1 | 515 | for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++) |
28439f5e | 516 | gdbsim_store_register (ops, regcache, regno); |
8238d0bf | 517 | return; |
c906108c | 518 | } |
40a6adc1 | 519 | else if (gdbarch_register_sim_regno (gdbarch, regno) >= 0) |
c906108c | 520 | { |
5fda2332 | 521 | gdb_byte tmp[MAX_REGISTER_SIZE]; |
c906108c | 522 | int nr_bytes; |
123f5f96 | 523 | |
56be3814 | 524 | regcache_cooked_read (regcache, regno, tmp); |
db04efe6 | 525 | nr_bytes = sim_store_register (sim_data->gdbsim_desc, |
474c1661 | 526 | gdbarch_register_sim_regno |
40a6adc1 MD |
527 | (gdbarch, regno), |
528 | tmp, register_size (gdbarch, regno)); | |
529 | if (nr_bytes > 0 && nr_bytes != register_size (gdbarch, regno)) | |
8e65ff28 | 530 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 531 | _("Register size different to expected")); |
dae477fe | 532 | if (nr_bytes < 0) |
74228e77 RM |
533 | internal_error (__FILE__, __LINE__, |
534 | _("Register %d not updated"), regno); | |
dae477fe | 535 | if (nr_bytes == 0) |
74228e77 RM |
536 | warning (_("Register %s not updated"), |
537 | gdbarch_register_name (gdbarch, regno)); | |
dae477fe | 538 | |
ea35711c | 539 | if (remote_debug) |
c906108c | 540 | { |
1385f66c | 541 | fprintf_unfiltered (gdb_stdlog, "gdbsim_store_register: %d", regno); |
c906108c | 542 | /* FIXME: We could print something more intelligible. */ |
40a6adc1 | 543 | dump_mem (tmp, register_size (gdbarch, regno)); |
c906108c SS |
544 | } |
545 | } | |
546 | } | |
547 | ||
548 | /* Kill the running program. This may involve closing any open files | |
549 | and releasing other resources acquired by the simulated program. */ | |
550 | ||
551 | static void | |
7d85a9c0 | 552 | gdbsim_kill (struct target_ops *ops) |
c906108c | 553 | { |
ea35711c | 554 | if (remote_debug) |
1385f66c | 555 | fprintf_unfiltered (gdb_stdlog, "gdbsim_kill\n"); |
c906108c SS |
556 | |
557 | /* There is no need to `kill' running simulator - the simulator is | |
52bb452f | 558 | not running. Mourning it is enough. */ |
bc1e6c81 | 559 | target_mourn_inferior (inferior_ptid); |
c906108c SS |
560 | } |
561 | ||
562 | /* Load an executable file into the target process. This is expected to | |
563 | not only bring new code into the target process, but also to update | |
564 | GDB's symbol tables to match. */ | |
565 | ||
566 | static void | |
9cbe5fff | 567 | gdbsim_load (struct target_ops *self, const char *args, int fromtty) |
c906108c | 568 | { |
d1a41061 | 569 | char **argv; |
b2b255bd | 570 | const char *prog; |
db04efe6 KB |
571 | struct sim_inferior_data *sim_data |
572 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NEEDED); | |
1986bccd | 573 | |
d1a41061 PP |
574 | if (args == NULL) |
575 | error_no_arg (_("program to load")); | |
1986bccd | 576 | |
d1a41061 | 577 | argv = gdb_buildargv (args); |
1986bccd AS |
578 | make_cleanup_freeargv (argv); |
579 | ||
580 | prog = tilde_expand (argv[0]); | |
581 | ||
582 | if (argv[1] != NULL) | |
583 | error (_("GDB sim does not yet support a load offset.")); | |
584 | ||
ea35711c | 585 | if (remote_debug) |
1385f66c | 586 | fprintf_unfiltered (gdb_stdlog, "gdbsim_load: prog \"%s\"\n", prog); |
c906108c | 587 | |
c906108c SS |
588 | /* FIXME: We will print two messages on error. |
589 | Need error to either not print anything if passed NULL or need | |
590 | another routine that doesn't take any arguments. */ | |
db04efe6 | 591 | if (sim_load (sim_data->gdbsim_desc, prog, NULL, fromtty) == SIM_RC_FAIL) |
8a3fe4f8 | 592 | error (_("unable to load program")); |
c906108c SS |
593 | |
594 | /* FIXME: If a load command should reset the targets registers then | |
0df8b418 | 595 | a call to sim_create_inferior() should go here. */ |
c906108c | 596 | |
db04efe6 | 597 | sim_data->program_loaded = 1; |
c906108c SS |
598 | } |
599 | ||
600 | ||
39f77062 | 601 | /* Start an inferior process and set inferior_ptid to its pid. |
c906108c SS |
602 | EXEC_FILE is the file to run. |
603 | ARGS is a string containing the arguments to the program. | |
604 | ENV is the environment vector to pass. Errors reported with error(). | |
605 | On VxWorks and various standalone systems, we ignore exec_file. */ | |
606 | /* This is called not only when we first attach, but also when the | |
607 | user types "run" after having attached. */ | |
608 | ||
609 | static void | |
3c8b2eda TJB |
610 | gdbsim_create_inferior (struct target_ops *target, char *exec_file, char *args, |
611 | char **env, int from_tty) | |
c906108c | 612 | { |
db04efe6 KB |
613 | struct sim_inferior_data *sim_data |
614 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NEEDED); | |
c906108c | 615 | int len; |
c5aa993b | 616 | char *arg_buf, **argv; |
c906108c SS |
617 | |
618 | if (exec_file == 0 || exec_bfd == 0) | |
8a3fe4f8 | 619 | warning (_("No executable file specified.")); |
db04efe6 | 620 | if (!sim_data->program_loaded) |
8a3fe4f8 | 621 | warning (_("No program loaded.")); |
c906108c | 622 | |
ea35711c | 623 | if (remote_debug) |
1385f66c PA |
624 | fprintf_unfiltered (gdb_stdlog, |
625 | "gdbsim_create_inferior: exec_file \"%s\", args \"%s\"\n", | |
626 | (exec_file ? exec_file : "(NULL)"), | |
627 | args); | |
c906108c | 628 | |
db04efe6 | 629 | if (ptid_equal (inferior_ptid, sim_data->remote_sim_ptid)) |
7d85a9c0 | 630 | gdbsim_kill (target); |
c906108c SS |
631 | remove_breakpoints (); |
632 | init_wait_for_inferior (); | |
633 | ||
634 | if (exec_file != NULL) | |
635 | { | |
c5aa993b | 636 | len = strlen (exec_file) + 1 + strlen (args) + 1 + /*slop */ 10; |
c906108c SS |
637 | arg_buf = (char *) alloca (len); |
638 | arg_buf[0] = '\0'; | |
639 | strcat (arg_buf, exec_file); | |
640 | strcat (arg_buf, " "); | |
641 | strcat (arg_buf, args); | |
d1a41061 | 642 | argv = gdb_buildargv (arg_buf); |
7a292a7a | 643 | make_cleanup_freeargv (argv); |
c906108c SS |
644 | } |
645 | else | |
646 | argv = NULL; | |
ddd60447 | 647 | |
2a7c8fd5 AB |
648 | if (!have_inferiors ()) |
649 | init_thread_list (); | |
650 | ||
ddd60447 MF |
651 | if (sim_create_inferior (sim_data->gdbsim_desc, exec_bfd, argv, env) |
652 | != SIM_RC_OK) | |
653 | error (_("Unable to create sim inferior.")); | |
c906108c | 654 | |
db04efe6 | 655 | inferior_ptid = sim_data->remote_sim_ptid; |
20176d8f | 656 | inferior_appeared (current_inferior (), ptid_get_pid (inferior_ptid)); |
9de2bdd7 PA |
657 | add_thread_silent (inferior_ptid); |
658 | ||
0df8b418 MS |
659 | insert_breakpoints (); /* Needed to get correct instruction |
660 | in cache. */ | |
c906108c | 661 | |
88056fbb | 662 | clear_proceed_status (0); |
c906108c SS |
663 | } |
664 | ||
665 | /* The open routine takes the rest of the parameters from the command, | |
666 | and (if successful) pushes a new target onto the stack. | |
667 | Targets should supply this routine, if only to provide an error message. */ | |
0df8b418 | 668 | /* Called when selecting the simulator. E.g. (gdb) target sim name. */ |
c906108c SS |
669 | |
670 | static void | |
014f9477 | 671 | gdbsim_open (const char *args, int from_tty) |
c906108c SS |
672 | { |
673 | int len; | |
674 | char *arg_buf; | |
db04efe6 | 675 | struct sim_inferior_data *sim_data; |
87d1b309 | 676 | const char *sysroot; |
db04efe6 | 677 | SIM_DESC gdbsim_desc; |
c906108c | 678 | |
87d1b309 MF |
679 | sysroot = gdb_sysroot; |
680 | if (is_target_filename (sysroot)) | |
681 | sysroot += strlen (TARGET_SYSROOT_PREFIX); | |
682 | ||
ea35711c | 683 | if (remote_debug) |
1385f66c PA |
684 | fprintf_unfiltered (gdb_stdlog, |
685 | "gdbsim_open: args \"%s\"\n", args ? args : "(null)"); | |
c906108c | 686 | |
db04efe6 KB |
687 | /* Ensure that the sim target is not on the target stack. This is |
688 | necessary, because if it is on the target stack, the call to | |
689 | push_target below will invoke sim_close(), thus freeing various | |
690 | state (including a sim instance) that we allocate prior to | |
691 | invoking push_target(). We want to delay the push_target() | |
692 | operation until after we complete those operations which could | |
693 | error out. */ | |
694 | if (gdbsim_is_open) | |
c906108c SS |
695 | unpush_target (&gdbsim_ops); |
696 | ||
c5aa993b | 697 | len = (7 + 1 /* gdbsim */ |
c906108c SS |
698 | + strlen (" -E little") |
699 | + strlen (" --architecture=xxxxxxxxxx") | |
23bf70af | 700 | + strlen (" --sysroot=") + strlen (sysroot) + |
c906108c | 701 | + (args ? strlen (args) : 0) |
c5aa993b | 702 | + 50) /* slack */ ; |
c906108c | 703 | arg_buf = (char *) alloca (len); |
c5aa993b | 704 | strcpy (arg_buf, "gdbsim"); /* 7 */ |
b6d373df | 705 | /* Specify the byte order for the target when it is explicitly |
0df8b418 | 706 | specified by the user (not auto detected). */ |
b6d373df | 707 | switch (selected_byte_order ()) |
c906108c | 708 | { |
a8cf2722 AC |
709 | case BFD_ENDIAN_BIG: |
710 | strcat (arg_buf, " -E big"); | |
711 | break; | |
712 | case BFD_ENDIAN_LITTLE: | |
713 | strcat (arg_buf, " -E little"); | |
714 | break; | |
715 | case BFD_ENDIAN_UNKNOWN: | |
716 | break; | |
c906108c SS |
717 | } |
718 | /* Specify the architecture of the target when it has been | |
719 | explicitly specified */ | |
a8cf2722 | 720 | if (selected_architecture_name () != NULL) |
c906108c SS |
721 | { |
722 | strcat (arg_buf, " --architecture="); | |
a8cf2722 | 723 | strcat (arg_buf, selected_architecture_name ()); |
c906108c | 724 | } |
f4b8c29b MF |
725 | /* Pass along gdb's concept of the sysroot. */ |
726 | strcat (arg_buf, " --sysroot="); | |
23bf70af | 727 | strcat (arg_buf, sysroot); |
c906108c SS |
728 | /* finally, any explicit args */ |
729 | if (args) | |
730 | { | |
c5aa993b | 731 | strcat (arg_buf, " "); /* 1 */ |
c906108c SS |
732 | strcat (arg_buf, args); |
733 | } | |
db04efe6 | 734 | sim_argv = gdb_buildargv (arg_buf); |
c906108c SS |
735 | |
736 | init_callbacks (); | |
db04efe6 | 737 | gdbsim_desc = sim_open (SIM_OPEN_DEBUG, &gdb_callback, exec_bfd, sim_argv); |
c906108c SS |
738 | |
739 | if (gdbsim_desc == 0) | |
db04efe6 KB |
740 | { |
741 | freeargv (sim_argv); | |
742 | sim_argv = NULL; | |
743 | error (_("unable to create simulator instance")); | |
744 | } | |
745 | ||
746 | /* Reset the pid numberings for this batch of sim instances. */ | |
747 | next_pid = INITIAL_PID; | |
748 | ||
749 | /* Allocate the inferior data, but do not allocate a sim instance | |
750 | since we've already just done that. */ | |
0df8b418 MS |
751 | sim_data = get_sim_inferior_data (current_inferior (), |
752 | SIM_INSTANCE_NOT_NEEDED); | |
db04efe6 KB |
753 | |
754 | sim_data->gdbsim_desc = gdbsim_desc; | |
c906108c SS |
755 | |
756 | push_target (&gdbsim_ops); | |
c906108c | 757 | printf_filtered ("Connected to the simulator.\n"); |
52bb452f DJ |
758 | |
759 | /* There's nothing running after "target sim" or "load"; not until | |
760 | "run". */ | |
761 | inferior_ptid = null_ptid; | |
db04efe6 KB |
762 | |
763 | gdbsim_is_open = 1; | |
764 | } | |
765 | ||
766 | /* Callback for iterate_over_inferiors. Called (indirectly) by | |
767 | gdbsim_close(). */ | |
768 | ||
769 | static int | |
770 | gdbsim_close_inferior (struct inferior *inf, void *arg) | |
771 | { | |
653090d3 SM |
772 | struct sim_inferior_data *sim_data |
773 | = (struct sim_inferior_data *) inferior_data (inf, sim_inferior_data_key); | |
db04efe6 KB |
774 | if (sim_data != NULL) |
775 | { | |
776 | ptid_t ptid = sim_data->remote_sim_ptid; | |
777 | ||
778 | sim_inferior_data_cleanup (inf, sim_data); | |
779 | set_inferior_data (inf, sim_inferior_data_key, NULL); | |
780 | ||
781 | /* Having a ptid allocated and stored in remote_sim_ptid does | |
0df8b418 | 782 | not mean that a corresponding inferior was ever created. |
db04efe6 KB |
783 | Thus we need to verify the existence of an inferior using the |
784 | pid in question before setting inferior_ptid via | |
785 | switch_to_thread() or mourning the inferior. */ | |
c9657e70 | 786 | if (find_inferior_ptid (ptid) != NULL) |
db04efe6 KB |
787 | { |
788 | switch_to_thread (ptid); | |
789 | generic_mourn_inferior (); | |
790 | } | |
791 | } | |
792 | ||
793 | return 0; | |
c906108c SS |
794 | } |
795 | ||
0df8b418 | 796 | /* Close out all files and local state before this target loses control. */ |
c906108c SS |
797 | |
798 | static void | |
de90e03d | 799 | gdbsim_close (struct target_ops *self) |
c906108c | 800 | { |
db04efe6 KB |
801 | struct sim_inferior_data *sim_data |
802 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
803 | ||
ea35711c | 804 | if (remote_debug) |
1385f66c | 805 | fprintf_unfiltered (gdb_stdlog, "gdbsim_close\n"); |
c906108c | 806 | |
db04efe6 | 807 | iterate_over_inferiors (gdbsim_close_inferior, NULL); |
c906108c | 808 | |
db04efe6 | 809 | if (sim_argv != NULL) |
c906108c | 810 | { |
db04efe6 KB |
811 | freeargv (sim_argv); |
812 | sim_argv = NULL; | |
c906108c SS |
813 | } |
814 | ||
815 | end_callbacks (); | |
db04efe6 KB |
816 | |
817 | gdbsim_is_open = 0; | |
c906108c SS |
818 | } |
819 | ||
820 | /* Takes a program previously attached to and detaches it. | |
821 | The program may resume execution (some targets do, some don't) and will | |
822 | no longer stop on signals, etc. We better not have left any breakpoints | |
823 | in the program or it'll die when it hits one. ARGS is arguments | |
824 | typed by the user (e.g. a signal to send the process). FROM_TTY | |
825 | says whether to be verbose or not. */ | |
826 | /* Terminate the open connection to the remote debugger. | |
827 | Use this when you want to detach and do something else with your gdb. */ | |
828 | ||
829 | static void | |
52554a0e | 830 | gdbsim_detach (struct target_ops *ops, const char *args, int from_tty) |
c906108c | 831 | { |
ea35711c | 832 | if (remote_debug) |
1385f66c | 833 | fprintf_unfiltered (gdb_stdlog, "gdbsim_detach: args \"%s\"\n", args); |
c906108c | 834 | |
7fdc1521 | 835 | unpush_target (ops); /* calls gdbsim_close to do the real work */ |
c906108c SS |
836 | if (from_tty) |
837 | printf_filtered ("Ending simulator %s debugging\n", target_shortname); | |
838 | } | |
c5aa993b | 839 | |
c906108c SS |
840 | /* Resume execution of the target process. STEP says whether to single-step |
841 | or to run free; SIGGNAL is the signal value (e.g. SIGINT) to be given | |
842 | to the target, or zero for no signal. */ | |
843 | ||
db04efe6 KB |
844 | struct resume_data |
845 | { | |
2ea28649 | 846 | enum gdb_signal siggnal; |
db04efe6 KB |
847 | int step; |
848 | }; | |
849 | ||
850 | static int | |
851 | gdbsim_resume_inferior (struct inferior *inf, void *arg) | |
852 | { | |
853 | struct sim_inferior_data *sim_data | |
854 | = get_sim_inferior_data (inf, SIM_INSTANCE_NOT_NEEDED); | |
653090d3 | 855 | struct resume_data *rd = (struct resume_data *) arg; |
db04efe6 KB |
856 | |
857 | if (sim_data) | |
858 | { | |
859 | sim_data->resume_siggnal = rd->siggnal; | |
860 | sim_data->resume_step = rd->step; | |
861 | ||
862 | if (remote_debug) | |
1385f66c PA |
863 | fprintf_unfiltered (gdb_stdlog, |
864 | _("gdbsim_resume: pid %d, step %d, signal %d\n"), | |
865 | inf->pid, rd->step, rd->siggnal); | |
db04efe6 KB |
866 | } |
867 | ||
868 | /* When called from iterate_over_inferiors, a zero return causes the | |
869 | iteration process to proceed until there are no more inferiors to | |
870 | consider. */ | |
871 | return 0; | |
872 | } | |
c906108c SS |
873 | |
874 | static void | |
2fb89e62 | 875 | gdbsim_resume (struct target_ops *ops, |
2ea28649 | 876 | ptid_t ptid, int step, enum gdb_signal siggnal) |
c906108c | 877 | { |
db04efe6 KB |
878 | struct resume_data rd; |
879 | struct sim_inferior_data *sim_data | |
880 | = get_sim_inferior_data_by_ptid (ptid, SIM_INSTANCE_NOT_NEEDED); | |
881 | ||
882 | rd.siggnal = siggnal; | |
883 | rd.step = step; | |
884 | ||
0df8b418 | 885 | /* We don't access any sim_data members within this function. |
db04efe6 KB |
886 | What's of interest is whether or not the call to |
887 | get_sim_inferior_data_by_ptid(), above, is able to obtain a | |
888 | non-NULL pointer. If it managed to obtain a non-NULL pointer, we | |
889 | know we have a single inferior to consider. If it's NULL, we | |
890 | either have multiple inferiors to resume or an error condition. */ | |
891 | ||
892 | if (sim_data) | |
c9657e70 | 893 | gdbsim_resume_inferior (find_inferior_ptid (ptid), &rd); |
db04efe6 KB |
894 | else if (ptid_equal (ptid, minus_one_ptid)) |
895 | iterate_over_inferiors (gdbsim_resume_inferior, &rd); | |
896 | else | |
8a3fe4f8 | 897 | error (_("The program is not being run.")); |
c906108c SS |
898 | } |
899 | ||
bfedc46a | 900 | /* Notify the simulator of an asynchronous request to interrupt. |
c5aa993b | 901 | |
bfedc46a | 902 | The simulator shall ensure that the interrupt request is eventually |
c906108c | 903 | delivered to the simulator. If the call is made while the |
bfedc46a | 904 | simulator is not running then the interrupt request is processed when |
c906108c SS |
905 | the simulator is next resumed. |
906 | ||
db04efe6 KB |
907 | For simulators that do not support this operation, just abort. */ |
908 | ||
909 | static int | |
bfedc46a | 910 | gdbsim_interrupt_inferior (struct inferior *inf, void *arg) |
db04efe6 KB |
911 | { |
912 | struct sim_inferior_data *sim_data | |
913 | = get_sim_inferior_data (inf, SIM_INSTANCE_NEEDED); | |
914 | ||
915 | if (sim_data) | |
916 | { | |
917 | if (!sim_stop (sim_data->gdbsim_desc)) | |
918 | { | |
919 | quit (); | |
920 | } | |
921 | } | |
922 | ||
923 | /* When called from iterate_over_inferiors, a zero return causes the | |
924 | iteration process to proceed until there are no more inferiors to | |
925 | consider. */ | |
926 | return 0; | |
927 | } | |
c906108c SS |
928 | |
929 | static void | |
bfedc46a | 930 | gdbsim_interrupt (struct target_ops *self, ptid_t ptid) |
c906108c | 931 | { |
db04efe6 KB |
932 | struct sim_inferior_data *sim_data; |
933 | ||
934 | if (ptid_equal (ptid, minus_one_ptid)) | |
c906108c | 935 | { |
bfedc46a | 936 | iterate_over_inferiors (gdbsim_interrupt_inferior, NULL); |
db04efe6 KB |
937 | } |
938 | else | |
939 | { | |
c9657e70 | 940 | struct inferior *inf = find_inferior_ptid (ptid); |
db04efe6 KB |
941 | |
942 | if (inf == NULL) | |
0df8b418 MS |
943 | error (_("Can't stop pid %d. No inferior found."), |
944 | ptid_get_pid (ptid)); | |
db04efe6 | 945 | |
bfedc46a | 946 | gdbsim_interrupt_inferior (inf, NULL); |
c906108c SS |
947 | } |
948 | } | |
949 | ||
950 | /* GDB version of os_poll_quit callback. | |
8a0ce09a | 951 | Taken from gdb/util.c - should be in a library. */ |
c906108c SS |
952 | |
953 | static int | |
fba45db2 | 954 | gdb_os_poll_quit (host_callback *p) |
c906108c | 955 | { |
98bbd631 AC |
956 | if (deprecated_ui_loop_hook != NULL) |
957 | deprecated_ui_loop_hook (0); | |
7a292a7a | 958 | |
522002f9 | 959 | if (check_quit_flag ()) /* gdb's idea of quit */ |
abf009ef | 960 | return 1; |
c906108c SS |
961 | return 0; |
962 | } | |
963 | ||
964 | /* Wait for inferior process to do something. Return pid of child, | |
965 | or -1 in case of error; store status through argument pointer STATUS, | |
0df8b418 | 966 | just as `wait' would. */ |
c906108c SS |
967 | |
968 | static void | |
fba45db2 | 969 | gdbsim_cntrl_c (int signo) |
c906108c | 970 | { |
bfedc46a | 971 | gdbsim_interrupt (NULL, minus_one_ptid); |
c906108c SS |
972 | } |
973 | ||
39f77062 | 974 | static ptid_t |
117de6a9 | 975 | gdbsim_wait (struct target_ops *ops, |
47608cb1 | 976 | ptid_t ptid, struct target_waitstatus *status, int options) |
c906108c | 977 | { |
db04efe6 | 978 | struct sim_inferior_data *sim_data; |
a40805d4 | 979 | static sighandler_t prev_sigint; |
c906108c SS |
980 | int sigrc = 0; |
981 | enum sim_stop reason = sim_running; | |
982 | ||
db04efe6 KB |
983 | /* This target isn't able to (yet) resume more than one inferior at a time. |
984 | When ptid is minus_one_ptid, just use the current inferior. If we're | |
985 | given an explicit pid, we'll try to find it and use that instead. */ | |
986 | if (ptid_equal (ptid, minus_one_ptid)) | |
0df8b418 MS |
987 | sim_data = get_sim_inferior_data (current_inferior (), |
988 | SIM_INSTANCE_NEEDED); | |
db04efe6 KB |
989 | else |
990 | { | |
991 | sim_data = get_sim_inferior_data_by_ptid (ptid, SIM_INSTANCE_NEEDED); | |
992 | if (sim_data == NULL) | |
993 | error (_("Unable to wait for pid %d. Inferior not found."), | |
994 | ptid_get_pid (ptid)); | |
995 | inferior_ptid = ptid; | |
996 | } | |
997 | ||
ea35711c | 998 | if (remote_debug) |
1385f66c | 999 | fprintf_unfiltered (gdb_stdlog, "gdbsim_wait\n"); |
c906108c SS |
1000 | |
1001 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) | |
1002 | { | |
1003 | struct sigaction sa, osa; | |
1004 | sa.sa_handler = gdbsim_cntrl_c; | |
1005 | sigemptyset (&sa.sa_mask); | |
1006 | sa.sa_flags = 0; | |
1007 | sigaction (SIGINT, &sa, &osa); | |
1008 | prev_sigint = osa.sa_handler; | |
1009 | } | |
1010 | #else | |
1011 | prev_sigint = signal (SIGINT, gdbsim_cntrl_c); | |
1012 | #endif | |
db04efe6 | 1013 | sim_resume (sim_data->gdbsim_desc, sim_data->resume_step, |
74228e77 | 1014 | sim_data->resume_siggnal); |
db04efe6 | 1015 | |
c906108c | 1016 | signal (SIGINT, prev_sigint); |
db04efe6 | 1017 | sim_data->resume_step = 0; |
c906108c | 1018 | |
db04efe6 | 1019 | sim_stop_reason (sim_data->gdbsim_desc, &reason, &sigrc); |
c906108c SS |
1020 | |
1021 | switch (reason) | |
1022 | { | |
1023 | case sim_exited: | |
1024 | status->kind = TARGET_WAITKIND_EXITED; | |
1025 | status->value.integer = sigrc; | |
1026 | break; | |
1027 | case sim_stopped: | |
1028 | switch (sigrc) | |
1029 | { | |
a493e3e2 | 1030 | case GDB_SIGNAL_ABRT: |
c906108c SS |
1031 | quit (); |
1032 | break; | |
a493e3e2 PA |
1033 | case GDB_SIGNAL_INT: |
1034 | case GDB_SIGNAL_TRAP: | |
c906108c SS |
1035 | default: |
1036 | status->kind = TARGET_WAITKIND_STOPPED; | |
653090d3 | 1037 | status->value.sig = (enum gdb_signal) sigrc; |
c906108c SS |
1038 | break; |
1039 | } | |
1040 | break; | |
1041 | case sim_signalled: | |
1042 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
653090d3 | 1043 | status->value.sig = (enum gdb_signal) sigrc; |
c906108c SS |
1044 | break; |
1045 | case sim_running: | |
1046 | case sim_polling: | |
0df8b418 | 1047 | /* FIXME: Is this correct? */ |
c906108c SS |
1048 | break; |
1049 | } | |
1050 | ||
39f77062 | 1051 | return inferior_ptid; |
c906108c SS |
1052 | } |
1053 | ||
1054 | /* Get ready to modify the registers array. On machines which store | |
1055 | individual registers, this doesn't need to do anything. On machines | |
1056 | which store all the registers in one fell swoop, this makes sure | |
1057 | that registers contains all the registers from the program being | |
1058 | debugged. */ | |
1059 | ||
1060 | static void | |
f32dbf8c | 1061 | gdbsim_prepare_to_store (struct target_ops *self, struct regcache *regcache) |
c906108c | 1062 | { |
0df8b418 | 1063 | /* Do nothing, since we can store individual regs. */ |
c906108c SS |
1064 | } |
1065 | ||
146ec4db PA |
1066 | /* Helper for gdbsim_xfer_partial that handles memory transfers. |
1067 | Arguments are like target_xfer_partial. */ | |
d93bce06 | 1068 | |
9b409511 | 1069 | static enum target_xfer_status |
146ec4db PA |
1070 | gdbsim_xfer_memory (struct target_ops *target, |
1071 | gdb_byte *readbuf, const gdb_byte *writebuf, | |
9b409511 | 1072 | ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) |
c906108c | 1073 | { |
db04efe6 KB |
1074 | struct sim_inferior_data *sim_data |
1075 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
b55e14c7 | 1076 | int l; |
db04efe6 | 1077 | |
0c012db1 KB |
1078 | /* If this target doesn't have memory yet, return 0 causing the |
1079 | request to be passed to a lower target, hopefully an exec | |
1080 | file. */ | |
1081 | if (!target->to_has_memory (target)) | |
9b409511 | 1082 | return TARGET_XFER_EOF; |
52bb452f | 1083 | |
db04efe6 | 1084 | if (!sim_data->program_loaded) |
8a3fe4f8 | 1085 | error (_("No program loaded.")); |
c906108c | 1086 | |
db04efe6 KB |
1087 | /* Note that we obtained the sim_data pointer above using |
1088 | SIM_INSTANCE_NOT_NEEDED. We do this so that we don't needlessly | |
1089 | allocate a sim instance prior to loading a program. If we | |
1090 | get to this point in the code though, gdbsim_desc should be | |
1091 | non-NULL. (Note that a sim instance is needed in order to load | |
1092 | the program...) */ | |
1093 | gdb_assert (sim_data->gdbsim_desc != NULL); | |
1094 | ||
ea35711c | 1095 | if (remote_debug) |
fcde0081 | 1096 | fprintf_unfiltered (gdb_stdlog, |
146ec4db PA |
1097 | "gdbsim_xfer_memory: readbuf %s, writebuf %s, " |
1098 | "memaddr %s, len %s\n", | |
1099 | host_address_to_string (readbuf), | |
1100 | host_address_to_string (writebuf), | |
fcde0081 | 1101 | paddress (target_gdbarch (), memaddr), |
b55e14c7 | 1102 | pulongest (len)); |
c906108c | 1103 | |
146ec4db | 1104 | if (writebuf) |
c906108c | 1105 | { |
fcde0081 | 1106 | if (remote_debug && len > 0) |
146ec4db | 1107 | dump_mem (writebuf, len); |
b55e14c7 | 1108 | l = sim_write (sim_data->gdbsim_desc, memaddr, writebuf, len); |
c906108c | 1109 | } |
c5aa993b | 1110 | else |
c906108c | 1111 | { |
b55e14c7 | 1112 | l = sim_read (sim_data->gdbsim_desc, memaddr, readbuf, len); |
ea35711c | 1113 | if (remote_debug && len > 0) |
146ec4db | 1114 | dump_mem (readbuf, len); |
c5aa993b | 1115 | } |
9b409511 YQ |
1116 | if (l > 0) |
1117 | { | |
1118 | *xfered_len = (ULONGEST) l; | |
1119 | return TARGET_XFER_OK; | |
1120 | } | |
1121 | else if (l == 0) | |
1122 | return TARGET_XFER_EOF; | |
1123 | else | |
1124 | return TARGET_XFER_E_IO; | |
c906108c SS |
1125 | } |
1126 | ||
146ec4db PA |
1127 | /* Target to_xfer_partial implementation. */ |
1128 | ||
9b409511 | 1129 | static enum target_xfer_status |
146ec4db PA |
1130 | gdbsim_xfer_partial (struct target_ops *ops, enum target_object object, |
1131 | const char *annex, gdb_byte *readbuf, | |
9b409511 YQ |
1132 | const gdb_byte *writebuf, ULONGEST offset, ULONGEST len, |
1133 | ULONGEST *xfered_len) | |
146ec4db PA |
1134 | { |
1135 | switch (object) | |
1136 | { | |
1137 | case TARGET_OBJECT_MEMORY: | |
9b409511 YQ |
1138 | return gdbsim_xfer_memory (ops, readbuf, writebuf, offset, len, |
1139 | xfered_len); | |
146ec4db PA |
1140 | |
1141 | default: | |
2ed4b548 | 1142 | return TARGET_XFER_E_IO; |
146ec4db PA |
1143 | } |
1144 | } | |
1145 | ||
c906108c | 1146 | static void |
fba45db2 | 1147 | gdbsim_files_info (struct target_ops *target) |
c906108c | 1148 | { |
db04efe6 KB |
1149 | struct sim_inferior_data *sim_data |
1150 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NEEDED); | |
0d18d720 | 1151 | const char *file = "nothing"; |
c906108c SS |
1152 | |
1153 | if (exec_bfd) | |
1154 | file = bfd_get_filename (exec_bfd); | |
1155 | ||
ea35711c | 1156 | if (remote_debug) |
1385f66c | 1157 | fprintf_unfiltered (gdb_stdlog, "gdbsim_files_info: file \"%s\"\n", file); |
c906108c SS |
1158 | |
1159 | if (exec_bfd) | |
1160 | { | |
1385f66c PA |
1161 | fprintf_unfiltered (gdb_stdlog, "\tAttached to %s running program %s\n", |
1162 | target_shortname, file); | |
db04efe6 | 1163 | sim_info (sim_data->gdbsim_desc, 0); |
c906108c SS |
1164 | } |
1165 | } | |
1166 | ||
1167 | /* Clear the simulator's notion of what the break points are. */ | |
1168 | ||
1169 | static void | |
3c8b2eda | 1170 | gdbsim_mourn_inferior (struct target_ops *target) |
c5aa993b | 1171 | { |
db04efe6 KB |
1172 | struct sim_inferior_data *sim_data |
1173 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
1174 | ||
ea35711c | 1175 | if (remote_debug) |
1385f66c | 1176 | fprintf_unfiltered (gdb_stdlog, "gdbsim_mourn_inferior:\n"); |
c906108c SS |
1177 | |
1178 | remove_breakpoints (); | |
1179 | generic_mourn_inferior (); | |
db04efe6 | 1180 | delete_thread_silent (sim_data->remote_sim_ptid); |
c906108c SS |
1181 | } |
1182 | ||
c906108c SS |
1183 | /* Pass the command argument through to the simulator verbatim. The |
1184 | simulator must do any command interpretation work. */ | |
1185 | ||
1186 | void | |
fba45db2 | 1187 | simulator_command (char *args, int from_tty) |
c906108c | 1188 | { |
db04efe6 KB |
1189 | struct sim_inferior_data *sim_data; |
1190 | ||
1191 | /* We use inferior_data() instead of get_sim_inferior_data() here in | |
1192 | order to avoid attaching a sim_inferior_data struct to an | |
1193 | inferior unnecessarily. The reason we take such care here is due | |
1194 | to the fact that this function, simulator_command(), may be called | |
1195 | even when the sim target is not active. If we were to use | |
1196 | get_sim_inferior_data() here, it is possible that this call would | |
1197 | be made either prior to gdbsim_open() or after gdbsim_close(), | |
1198 | thus allocating memory that would not be garbage collected until | |
1199 | the ultimate destruction of the associated inferior. */ | |
1200 | ||
653090d3 SM |
1201 | sim_data = ((struct sim_inferior_data *) |
1202 | inferior_data (current_inferior (), sim_inferior_data_key)); | |
db04efe6 | 1203 | if (sim_data == NULL || sim_data->gdbsim_desc == NULL) |
c906108c SS |
1204 | { |
1205 | ||
1206 | /* PREVIOUSLY: The user may give a command before the simulator | |
74228e77 RM |
1207 | is opened. [...] (??? assuming of course one wishes to |
1208 | continue to allow commands to be sent to unopened simulators, | |
1209 | which isn't entirely unreasonable). */ | |
c906108c SS |
1210 | |
1211 | /* The simulator is a builtin abstraction of a remote target. | |
74228e77 RM |
1212 | Consistent with that model, access to the simulator, via sim |
1213 | commands, is restricted to the period when the channel to the | |
1214 | simulator is open. */ | |
c906108c | 1215 | |
8a3fe4f8 | 1216 | error (_("Not connected to the simulator target")); |
c906108c SS |
1217 | } |
1218 | ||
db04efe6 | 1219 | sim_do_command (sim_data->gdbsim_desc, args); |
c906108c SS |
1220 | |
1221 | /* Invalidate the register cache, in case the simulator command does | |
0df8b418 | 1222 | something funny. */ |
c5aa993b | 1223 | registers_changed (); |
c906108c SS |
1224 | } |
1225 | ||
34370865 | 1226 | static VEC (char_ptr) * |
3cb2ab1a SE |
1227 | sim_command_completer (struct cmd_list_element *ignore, const char *text, |
1228 | const char *word) | |
56a9aa1d MF |
1229 | { |
1230 | struct sim_inferior_data *sim_data; | |
34370865 JB |
1231 | char **tmp; |
1232 | int i; | |
09d5912c | 1233 | VEC (char_ptr) *result = NULL; |
56a9aa1d | 1234 | |
653090d3 SM |
1235 | sim_data = ((struct sim_inferior_data *) |
1236 | inferior_data (current_inferior (), sim_inferior_data_key)); | |
56a9aa1d MF |
1237 | if (sim_data == NULL || sim_data->gdbsim_desc == NULL) |
1238 | return NULL; | |
1239 | ||
34370865 JB |
1240 | tmp = sim_complete_command (sim_data->gdbsim_desc, text, word); |
1241 | if (tmp == NULL) | |
1242 | return NULL; | |
1243 | ||
1244 | /* Transform the array into a VEC, and then free the array. */ | |
1245 | for (i = 0; tmp[i] != NULL; i++) | |
1246 | VEC_safe_push (char_ptr, result, tmp[i]); | |
1247 | xfree (tmp); | |
1248 | ||
1249 | return result; | |
56a9aa1d MF |
1250 | } |
1251 | ||
9de2bdd7 PA |
1252 | /* Check to see if a thread is still alive. */ |
1253 | ||
1254 | static int | |
28439f5e | 1255 | gdbsim_thread_alive (struct target_ops *ops, ptid_t ptid) |
9de2bdd7 | 1256 | { |
db04efe6 KB |
1257 | struct sim_inferior_data *sim_data |
1258 | = get_sim_inferior_data_by_ptid (ptid, SIM_INSTANCE_NOT_NEEDED); | |
1259 | ||
1260 | if (sim_data == NULL) | |
1261 | return 0; | |
1262 | ||
1263 | if (ptid_equal (ptid, sim_data->remote_sim_ptid)) | |
9de2bdd7 PA |
1264 | /* The simulators' task is always alive. */ |
1265 | return 1; | |
1266 | ||
1267 | return 0; | |
1268 | } | |
1269 | ||
1270 | /* Convert a thread ID to a string. Returns the string in a static | |
1271 | buffer. */ | |
1272 | ||
1273 | static char * | |
117de6a9 | 1274 | gdbsim_pid_to_str (struct target_ops *ops, ptid_t ptid) |
9de2bdd7 | 1275 | { |
9de2bdd7 PA |
1276 | return normal_pid_to_str (ptid); |
1277 | } | |
1278 | ||
0c012db1 KB |
1279 | /* Simulator memory may be accessed after the program has been loaded. */ |
1280 | ||
b261e0c5 | 1281 | static int |
0c012db1 KB |
1282 | gdbsim_has_all_memory (struct target_ops *ops) |
1283 | { | |
1284 | struct sim_inferior_data *sim_data | |
1285 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
1286 | ||
1287 | if (!sim_data->program_loaded) | |
1288 | return 0; | |
1289 | ||
1290 | return 1; | |
1291 | } | |
1292 | ||
b261e0c5 | 1293 | static int |
0c012db1 KB |
1294 | gdbsim_has_memory (struct target_ops *ops) |
1295 | { | |
1296 | struct sim_inferior_data *sim_data | |
1297 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
1298 | ||
1299 | if (!sim_data->program_loaded) | |
1300 | return 0; | |
1301 | ||
1302 | return 1; | |
1303 | } | |
1304 | ||
0df8b418 | 1305 | /* Define the target subroutine names. */ |
c906108c | 1306 | |
c5aa993b JM |
1307 | struct target_ops gdbsim_ops; |
1308 | ||
1309 | static void | |
1310 | init_gdbsim_ops (void) | |
1311 | { | |
1312 | gdbsim_ops.to_shortname = "sim"; | |
1313 | gdbsim_ops.to_longname = "simulator"; | |
1314 | gdbsim_ops.to_doc = "Use the compiled-in simulator."; | |
1315 | gdbsim_ops.to_open = gdbsim_open; | |
1316 | gdbsim_ops.to_close = gdbsim_close; | |
c5aa993b | 1317 | gdbsim_ops.to_detach = gdbsim_detach; |
c5aa993b JM |
1318 | gdbsim_ops.to_resume = gdbsim_resume; |
1319 | gdbsim_ops.to_wait = gdbsim_wait; | |
c5aa993b JM |
1320 | gdbsim_ops.to_fetch_registers = gdbsim_fetch_register; |
1321 | gdbsim_ops.to_store_registers = gdbsim_store_register; | |
1322 | gdbsim_ops.to_prepare_to_store = gdbsim_prepare_to_store; | |
146ec4db | 1323 | gdbsim_ops.to_xfer_partial = gdbsim_xfer_partial; |
c5aa993b | 1324 | gdbsim_ops.to_files_info = gdbsim_files_info; |
8181d85f DJ |
1325 | gdbsim_ops.to_insert_breakpoint = memory_insert_breakpoint; |
1326 | gdbsim_ops.to_remove_breakpoint = memory_remove_breakpoint; | |
c5aa993b JM |
1327 | gdbsim_ops.to_kill = gdbsim_kill; |
1328 | gdbsim_ops.to_load = gdbsim_load; | |
c5aa993b | 1329 | gdbsim_ops.to_create_inferior = gdbsim_create_inferior; |
c5aa993b | 1330 | gdbsim_ops.to_mourn_inferior = gdbsim_mourn_inferior; |
bfedc46a | 1331 | gdbsim_ops.to_interrupt = gdbsim_interrupt; |
9de2bdd7 PA |
1332 | gdbsim_ops.to_thread_alive = gdbsim_thread_alive; |
1333 | gdbsim_ops.to_pid_to_str = gdbsim_pid_to_str; | |
c5aa993b | 1334 | gdbsim_ops.to_stratum = process_stratum; |
0c012db1 KB |
1335 | gdbsim_ops.to_has_all_memory = gdbsim_has_all_memory; |
1336 | gdbsim_ops.to_has_memory = gdbsim_has_memory; | |
c35b1492 PA |
1337 | gdbsim_ops.to_has_stack = default_child_has_stack; |
1338 | gdbsim_ops.to_has_registers = default_child_has_registers; | |
1339 | gdbsim_ops.to_has_execution = default_child_has_execution; | |
c5aa993b | 1340 | gdbsim_ops.to_magic = OPS_MAGIC; |
c906108c SS |
1341 | } |
1342 | ||
1343 | void | |
fba45db2 | 1344 | _initialize_remote_sim (void) |
c906108c | 1345 | { |
56a9aa1d MF |
1346 | struct cmd_list_element *c; |
1347 | ||
c5aa993b | 1348 | init_gdbsim_ops (); |
c906108c SS |
1349 | add_target (&gdbsim_ops); |
1350 | ||
56a9aa1d MF |
1351 | c = add_com ("sim", class_obscure, simulator_command, |
1352 | _("Send a command to the simulator.")); | |
1353 | set_cmd_completer (c, sim_command_completer); | |
9de2bdd7 | 1354 | |
db04efe6 | 1355 | sim_inferior_data_key |
c5d9b215 | 1356 | = register_inferior_data_with_cleanup (NULL, sim_inferior_data_cleanup); |
c906108c | 1357 | } |