Commit | Line | Data |
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c906108c | 1 | /* Generic remote debugging interface for simulators. |
0a65a603 | 2 | |
28e7fd62 | 3 | Copyright (C) 1993-2013 Free Software Foundation, Inc. |
0a65a603 | 4 | |
c906108c SS |
5 | Contributed by Cygnus Support. |
6 | Steve Chamberlain (sac@cygnus.com). | |
7 | ||
c5aa993b | 8 | This file is part of GDB. |
c906108c | 9 | |
c5aa993b JM |
10 | This program is free software; you can redistribute it and/or modify |
11 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 12 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 13 | (at your option) any later version. |
c906108c | 14 | |
c5aa993b JM |
15 | This program is distributed in the hope that it will be useful, |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
c906108c | 19 | |
c5aa993b | 20 | You should have received a copy of the GNU General Public License |
a9762ec7 | 21 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
22 | |
23 | #include "defs.h" | |
24 | #include "inferior.h" | |
c906108c SS |
25 | #include "value.h" |
26 | #include "gdb_string.h" | |
27 | #include <ctype.h> | |
28 | #include <fcntl.h> | |
29 | #include <signal.h> | |
30 | #include <setjmp.h> | |
31 | #include <errno.h> | |
32 | #include "terminal.h" | |
33 | #include "target.h" | |
34 | #include "gdbcore.h" | |
3c25f8c7 AC |
35 | #include "gdb/callback.h" |
36 | #include "gdb/remote-sim.h" | |
c906108c | 37 | #include "command.h" |
4e052eda | 38 | #include "regcache.h" |
8238d0bf AC |
39 | #include "gdb_assert.h" |
40 | #include "sim-regno.h" | |
a8cf2722 | 41 | #include "arch-utils.h" |
1986bccd | 42 | #include "readline/readline.h" |
9de2bdd7 | 43 | #include "gdbthread.h" |
c906108c SS |
44 | |
45 | /* Prototypes */ | |
46 | ||
a14ed312 | 47 | extern void _initialize_remote_sim (void); |
392a587b | 48 | |
a14ed312 | 49 | static void init_callbacks (void); |
c906108c | 50 | |
a14ed312 | 51 | static void end_callbacks (void); |
c906108c | 52 | |
a14ed312 | 53 | static int gdb_os_write_stdout (host_callback *, const char *, int); |
c906108c | 54 | |
a14ed312 | 55 | static void gdb_os_flush_stdout (host_callback *); |
c906108c | 56 | |
a14ed312 | 57 | static int gdb_os_write_stderr (host_callback *, const char *, int); |
c906108c | 58 | |
a14ed312 | 59 | static void gdb_os_flush_stderr (host_callback *); |
c906108c | 60 | |
a14ed312 | 61 | static int gdb_os_poll_quit (host_callback *); |
c906108c | 62 | |
0df8b418 | 63 | /* printf_filtered is depreciated. */ |
a14ed312 | 64 | static void gdb_os_printf_filtered (host_callback *, const char *, ...); |
c906108c | 65 | |
a14ed312 | 66 | static void gdb_os_vprintf_filtered (host_callback *, const char *, va_list); |
c906108c | 67 | |
a14ed312 | 68 | static void gdb_os_evprintf_filtered (host_callback *, const char *, va_list); |
c906108c | 69 | |
c25c4a8b JK |
70 | static void gdb_os_error (host_callback *, const char *, ...) |
71 | ATTRIBUTE_NORETURN; | |
c906108c | 72 | |
7d85a9c0 | 73 | static void gdbsim_kill (struct target_ops *); |
c906108c | 74 | |
a14ed312 | 75 | static void gdbsim_load (char *prog, int fromtty); |
c906108c | 76 | |
a14ed312 | 77 | static void gdbsim_open (char *args, int from_tty); |
c906108c | 78 | |
460014f5 | 79 | static void gdbsim_close (void); |
c906108c | 80 | |
136d6dae | 81 | static void gdbsim_detach (struct target_ops *ops, char *args, int from_tty); |
c906108c | 82 | |
316f2060 | 83 | static void gdbsim_prepare_to_store (struct regcache *regcache); |
c906108c | 84 | |
a14ed312 | 85 | static void gdbsim_files_info (struct target_ops *target); |
c906108c | 86 | |
3c8b2eda | 87 | static void gdbsim_mourn_inferior (struct target_ops *target); |
c906108c | 88 | |
f9c72d52 | 89 | static void gdbsim_stop (ptid_t ptid); |
c906108c | 90 | |
a14ed312 | 91 | void simulator_command (char *args, int from_tty); |
c906108c SS |
92 | |
93 | /* Naming convention: | |
94 | ||
95 | sim_* are the interface to the simulator (see remote-sim.h). | |
96 | gdbsim_* are stuff which is internal to gdb. */ | |
97 | ||
98 | /* Forward data declarations */ | |
99 | extern struct target_ops gdbsim_ops; | |
100 | ||
db04efe6 KB |
101 | static const struct inferior_data *sim_inferior_data_key; |
102 | ||
103 | /* Simulator-specific, per-inferior state. */ | |
104 | struct sim_inferior_data { | |
105 | /* Flag which indicates whether or not the program has been loaded. */ | |
106 | int program_loaded; | |
107 | ||
108 | /* Simulator descriptor for this inferior. */ | |
109 | SIM_DESC gdbsim_desc; | |
110 | ||
111 | /* This is the ptid we use for this particular simulator instance. Its | |
112 | value is somewhat arbitrary, as the simulator target don't have a | |
113 | notion of tasks or threads, but we need something non-null to place | |
114 | in inferior_ptid. For simulators which permit multiple instances, | |
115 | we also need a unique identifier to use for each inferior. */ | |
116 | ptid_t remote_sim_ptid; | |
117 | ||
118 | /* Signal with which to resume. */ | |
2ea28649 | 119 | enum gdb_signal resume_siggnal; |
db04efe6 KB |
120 | |
121 | /* Flag which indicates whether resume should step or not. */ | |
122 | int resume_step; | |
123 | }; | |
124 | ||
125 | /* Flag indicating the "open" status of this module. It's set to 1 | |
126 | in gdbsim_open() and 0 in gdbsim_close(). */ | |
127 | static int gdbsim_is_open = 0; | |
128 | ||
129 | /* Value of the next pid to allocate for an inferior. As indicated | |
130 | elsewhere, its initial value is somewhat arbitrary; it's critical | |
131 | though that it's not zero or negative. */ | |
132 | static int next_pid; | |
133 | #define INITIAL_PID 42000 | |
134 | ||
135 | /* Argument list to pass to sim_open(). It is allocated in gdbsim_open() | |
136 | and deallocated in gdbsim_close(). The lifetime needs to extend beyond | |
137 | the call to gdbsim_open() due to the fact that other sim instances other | |
138 | than the first will be allocated after the gdbsim_open() call. */ | |
139 | static char **sim_argv = NULL; | |
140 | ||
141 | /* OS-level callback functions for write, flush, etc. */ | |
142 | static host_callback gdb_callback; | |
143 | static int callbacks_initialized = 0; | |
144 | ||
145 | /* Callback for iterate_over_inferiors. It checks to see if the sim | |
146 | descriptor passed via ARG is the same as that for the inferior | |
147 | designated by INF. Return true if so; false otherwise. */ | |
148 | ||
149 | static int | |
150 | check_for_duplicate_sim_descriptor (struct inferior *inf, void *arg) | |
151 | { | |
152 | struct sim_inferior_data *sim_data; | |
153 | SIM_DESC new_sim_desc = arg; | |
154 | ||
155 | sim_data = inferior_data (inf, sim_inferior_data_key); | |
156 | ||
157 | return (sim_data != NULL && sim_data->gdbsim_desc == new_sim_desc); | |
158 | } | |
159 | ||
160 | /* Flags indicating whether or not a sim instance is needed. One of these | |
161 | flags should be passed to get_sim_inferior_data(). */ | |
162 | ||
163 | enum {SIM_INSTANCE_NOT_NEEDED = 0, SIM_INSTANCE_NEEDED = 1}; | |
164 | ||
165 | /* Obtain pointer to per-inferior simulator data, allocating it if necessary. | |
166 | Attempt to open the sim if SIM_INSTANCE_NEEDED is true. */ | |
167 | ||
168 | static struct sim_inferior_data * | |
169 | get_sim_inferior_data (struct inferior *inf, int sim_instance_needed) | |
170 | { | |
171 | SIM_DESC sim_desc = NULL; | |
172 | struct sim_inferior_data *sim_data | |
173 | = inferior_data (inf, sim_inferior_data_key); | |
174 | ||
175 | /* Try to allocate a new sim instance, if needed. We do this ahead of | |
176 | a potential allocation of a sim_inferior_data struct in order to | |
177 | avoid needlessly allocating that struct in the event that the sim | |
178 | instance allocation fails. */ | |
179 | if (sim_instance_needed == SIM_INSTANCE_NEEDED | |
180 | && (sim_data == NULL || sim_data->gdbsim_desc == NULL)) | |
181 | { | |
182 | struct inferior *idup; | |
183 | sim_desc = sim_open (SIM_OPEN_DEBUG, &gdb_callback, exec_bfd, sim_argv); | |
184 | if (sim_desc == NULL) | |
185 | error (_("Unable to create simulator instance for inferior %d."), | |
186 | inf->num); | |
187 | ||
188 | idup = iterate_over_inferiors (check_for_duplicate_sim_descriptor, | |
189 | sim_desc); | |
190 | if (idup != NULL) | |
191 | { | |
192 | /* We don't close the descriptor due to the fact that it's | |
193 | shared with some other inferior. If we were to close it, | |
194 | that might needlessly muck up the other inferior. Of | |
195 | course, it's possible that the damage has already been | |
196 | done... Note that it *will* ultimately be closed during | |
197 | cleanup of the other inferior. */ | |
198 | sim_desc = NULL; | |
199 | error ( | |
200 | _("Inferior %d and inferior %d would have identical simulator state.\n" | |
201 | "(This simulator does not support the running of more than one inferior.)"), | |
202 | inf->num, idup->num); | |
203 | } | |
204 | } | |
205 | ||
206 | if (sim_data == NULL) | |
207 | { | |
208 | sim_data = XZALLOC(struct sim_inferior_data); | |
209 | set_inferior_data (inf, sim_inferior_data_key, sim_data); | |
210 | ||
211 | /* Allocate a ptid for this inferior. */ | |
212 | sim_data->remote_sim_ptid = ptid_build (next_pid, 0, next_pid); | |
213 | next_pid++; | |
214 | ||
215 | /* Initialize the other instance variables. */ | |
216 | sim_data->program_loaded = 0; | |
217 | sim_data->gdbsim_desc = sim_desc; | |
a493e3e2 | 218 | sim_data->resume_siggnal = GDB_SIGNAL_0; |
db04efe6 KB |
219 | sim_data->resume_step = 0; |
220 | } | |
221 | else if (sim_desc) | |
222 | { | |
223 | /* This handles the case where sim_data was allocated prior to | |
224 | needing a sim instance. */ | |
225 | sim_data->gdbsim_desc = sim_desc; | |
226 | } | |
c906108c | 227 | |
c906108c | 228 | |
db04efe6 KB |
229 | return sim_data; |
230 | } | |
231 | ||
232 | /* Return pointer to per-inferior simulator data using PTID to find the | |
233 | inferior in question. Return NULL when no inferior is found or | |
234 | when ptid has a zero or negative pid component. */ | |
235 | ||
236 | static struct sim_inferior_data * | |
237 | get_sim_inferior_data_by_ptid (ptid_t ptid, int sim_instance_needed) | |
238 | { | |
239 | struct inferior *inf; | |
240 | int pid = ptid_get_pid (ptid); | |
241 | ||
242 | if (pid <= 0) | |
243 | return NULL; | |
244 | ||
245 | inf = find_inferior_pid (pid); | |
246 | ||
247 | if (inf) | |
248 | return get_sim_inferior_data (inf, sim_instance_needed); | |
249 | else | |
250 | return NULL; | |
251 | } | |
252 | ||
253 | /* Free the per-inferior simulator data. */ | |
254 | ||
255 | static void | |
256 | sim_inferior_data_cleanup (struct inferior *inf, void *data) | |
257 | { | |
258 | struct sim_inferior_data *sim_data = data; | |
259 | ||
260 | if (sim_data != NULL) | |
261 | { | |
262 | if (sim_data->gdbsim_desc) | |
263 | { | |
264 | sim_close (sim_data->gdbsim_desc, 0); | |
265 | sim_data->gdbsim_desc = NULL; | |
266 | } | |
267 | xfree (sim_data); | |
268 | } | |
269 | } | |
9de2bdd7 | 270 | |
c906108c | 271 | static void |
146ec4db | 272 | dump_mem (const gdb_byte *buf, int len) |
c906108c | 273 | { |
3d468296 AB |
274 | printf_filtered ("\t"); |
275 | ||
276 | if (len == 8 || len == 4) | |
c906108c | 277 | { |
3d468296 | 278 | uint32_t l[2]; |
123f5f96 | 279 | |
3d468296 AB |
280 | memcpy (l, buf, len); |
281 | printf_filtered ("0x%08x", l[0]); | |
282 | if (len == 8) | |
283 | printf_filtered (" 0x%08x", l[1]); | |
284 | } | |
285 | else | |
286 | { | |
287 | int i; | |
123f5f96 | 288 | |
3d468296 AB |
289 | for (i = 0; i < len; i++) |
290 | printf_filtered ("0x%02x ", buf[i]); | |
c906108c | 291 | } |
3d468296 AB |
292 | |
293 | printf_filtered ("\n"); | |
c906108c SS |
294 | } |
295 | ||
c906108c SS |
296 | /* Initialize gdb_callback. */ |
297 | ||
298 | static void | |
fba45db2 | 299 | init_callbacks (void) |
c906108c | 300 | { |
c5aa993b | 301 | if (!callbacks_initialized) |
c906108c SS |
302 | { |
303 | gdb_callback = default_callback; | |
304 | gdb_callback.init (&gdb_callback); | |
305 | gdb_callback.write_stdout = gdb_os_write_stdout; | |
306 | gdb_callback.flush_stdout = gdb_os_flush_stdout; | |
307 | gdb_callback.write_stderr = gdb_os_write_stderr; | |
308 | gdb_callback.flush_stderr = gdb_os_flush_stderr; | |
309 | gdb_callback.printf_filtered = gdb_os_printf_filtered; | |
310 | gdb_callback.vprintf_filtered = gdb_os_vprintf_filtered; | |
311 | gdb_callback.evprintf_filtered = gdb_os_evprintf_filtered; | |
312 | gdb_callback.error = gdb_os_error; | |
313 | gdb_callback.poll_quit = gdb_os_poll_quit; | |
314 | gdb_callback.magic = HOST_CALLBACK_MAGIC; | |
315 | callbacks_initialized = 1; | |
316 | } | |
317 | } | |
318 | ||
319 | /* Release callbacks (free resources used by them). */ | |
320 | ||
321 | static void | |
fba45db2 | 322 | end_callbacks (void) |
c906108c SS |
323 | { |
324 | if (callbacks_initialized) | |
325 | { | |
326 | gdb_callback.shutdown (&gdb_callback); | |
327 | callbacks_initialized = 0; | |
328 | } | |
329 | } | |
330 | ||
331 | /* GDB version of os_write_stdout callback. */ | |
332 | ||
c5aa993b | 333 | static int |
fba45db2 | 334 | gdb_os_write_stdout (host_callback *p, const char *buf, int len) |
c906108c SS |
335 | { |
336 | int i; | |
337 | char b[2]; | |
338 | ||
d9fcf2fb | 339 | ui_file_write (gdb_stdtarg, buf, len); |
c906108c SS |
340 | return len; |
341 | } | |
342 | ||
343 | /* GDB version of os_flush_stdout callback. */ | |
344 | ||
345 | static void | |
fba45db2 | 346 | gdb_os_flush_stdout (host_callback *p) |
c906108c | 347 | { |
4ce44c66 | 348 | gdb_flush (gdb_stdtarg); |
c906108c SS |
349 | } |
350 | ||
351 | /* GDB version of os_write_stderr callback. */ | |
352 | ||
c5aa993b | 353 | static int |
fba45db2 | 354 | gdb_os_write_stderr (host_callback *p, const char *buf, int len) |
c906108c SS |
355 | { |
356 | int i; | |
357 | char b[2]; | |
358 | ||
c5aa993b | 359 | for (i = 0; i < len; i++) |
c906108c SS |
360 | { |
361 | b[0] = buf[i]; | |
362 | b[1] = 0; | |
22e8e3c7 | 363 | fputs_unfiltered (b, gdb_stdtargerr); |
c906108c SS |
364 | } |
365 | return len; | |
366 | } | |
367 | ||
368 | /* GDB version of os_flush_stderr callback. */ | |
369 | ||
370 | static void | |
fba45db2 | 371 | gdb_os_flush_stderr (host_callback *p) |
c906108c | 372 | { |
22e8e3c7 | 373 | gdb_flush (gdb_stdtargerr); |
c906108c SS |
374 | } |
375 | ||
376 | /* GDB version of printf_filtered callback. */ | |
377 | ||
c906108c | 378 | static void |
c5aa993b | 379 | gdb_os_printf_filtered (host_callback * p, const char *format,...) |
c906108c SS |
380 | { |
381 | va_list args; | |
c906108c | 382 | |
123f5f96 | 383 | va_start (args, format); |
c906108c | 384 | vfprintf_filtered (gdb_stdout, format, args); |
c906108c SS |
385 | va_end (args); |
386 | } | |
387 | ||
388 | /* GDB version of error vprintf_filtered. */ | |
389 | ||
c906108c | 390 | static void |
c5aa993b | 391 | gdb_os_vprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c SS |
392 | { |
393 | vfprintf_filtered (gdb_stdout, format, ap); | |
394 | } | |
395 | ||
396 | /* GDB version of error evprintf_filtered. */ | |
397 | ||
c906108c | 398 | static void |
c5aa993b | 399 | gdb_os_evprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c SS |
400 | { |
401 | vfprintf_filtered (gdb_stderr, format, ap); | |
402 | } | |
403 | ||
404 | /* GDB version of error callback. */ | |
405 | ||
c906108c | 406 | static void |
58d4abe1 | 407 | gdb_os_error (host_callback * p, const char *format, ...) |
c906108c | 408 | { |
58d4abe1 | 409 | va_list args; |
123f5f96 | 410 | |
58d4abe1 PA |
411 | va_start (args, format); |
412 | verror (format, args); | |
413 | va_end (args); | |
c906108c SS |
414 | } |
415 | ||
8238d0bf | 416 | int |
e7faf938 | 417 | one2one_register_sim_regno (struct gdbarch *gdbarch, int regnum) |
8238d0bf AC |
418 | { |
419 | /* Only makes sense to supply raw registers. */ | |
e7faf938 | 420 | gdb_assert (regnum >= 0 && regnum < gdbarch_num_regs (gdbarch)); |
8238d0bf AC |
421 | return regnum; |
422 | } | |
423 | ||
c906108c | 424 | static void |
28439f5e PA |
425 | gdbsim_fetch_register (struct target_ops *ops, |
426 | struct regcache *regcache, int regno) | |
c906108c | 427 | { |
40a6adc1 | 428 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
db04efe6 KB |
429 | struct sim_inferior_data *sim_data |
430 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NEEDED); | |
123f5f96 | 431 | |
c5aa993b | 432 | if (regno == -1) |
c906108c | 433 | { |
40a6adc1 | 434 | for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++) |
28439f5e | 435 | gdbsim_fetch_register (ops, regcache, regno); |
8238d0bf | 436 | return; |
c906108c | 437 | } |
8238d0bf | 438 | |
40a6adc1 | 439 | switch (gdbarch_register_sim_regno (gdbarch, regno)) |
c906108c | 440 | { |
8238d0bf AC |
441 | case LEGACY_SIM_REGNO_IGNORE: |
442 | break; | |
443 | case SIM_REGNO_DOES_NOT_EXIST: | |
444 | { | |
445 | /* For moment treat a `does not exist' register the same way | |
446 | as an ``unavailable'' register. */ | |
e362b510 | 447 | gdb_byte buf[MAX_REGISTER_SIZE]; |
8238d0bf | 448 | int nr_bytes; |
123f5f96 | 449 | |
d9d9c31f | 450 | memset (buf, 0, MAX_REGISTER_SIZE); |
56be3814 | 451 | regcache_raw_supply (regcache, regno, buf); |
8238d0bf AC |
452 | break; |
453 | } | |
56be3814 | 454 | |
8238d0bf AC |
455 | default: |
456 | { | |
457 | static int warn_user = 1; | |
e362b510 | 458 | gdb_byte buf[MAX_REGISTER_SIZE]; |
8238d0bf | 459 | int nr_bytes; |
123f5f96 | 460 | |
40a6adc1 | 461 | gdb_assert (regno >= 0 && regno < gdbarch_num_regs (gdbarch)); |
d9d9c31f | 462 | memset (buf, 0, MAX_REGISTER_SIZE); |
db04efe6 | 463 | nr_bytes = sim_fetch_register (sim_data->gdbsim_desc, |
474c1661 | 464 | gdbarch_register_sim_regno |
40a6adc1 | 465 | (gdbarch, regno), |
474c1661 | 466 | buf, |
40a6adc1 MD |
467 | register_size (gdbarch, regno)); |
468 | if (nr_bytes > 0 | |
469 | && nr_bytes != register_size (gdbarch, regno) && warn_user) | |
8238d0bf AC |
470 | { |
471 | fprintf_unfiltered (gdb_stderr, | |
0df8b418 MS |
472 | "Size of register %s (%d/%d) " |
473 | "incorrect (%d instead of %d))", | |
40a6adc1 | 474 | gdbarch_register_name (gdbarch, regno), |
474c1661 UW |
475 | regno, |
476 | gdbarch_register_sim_regno | |
40a6adc1 MD |
477 | (gdbarch, regno), |
478 | nr_bytes, register_size (gdbarch, regno)); | |
8238d0bf AC |
479 | warn_user = 0; |
480 | } | |
481 | /* FIXME: cagney/2002-05-27: Should check `nr_bytes == 0' | |
278a7cf7 | 482 | indicating that GDB and the SIM have different ideas about |
8238d0bf AC |
483 | which registers are fetchable. */ |
484 | /* Else if (nr_bytes < 0): an old simulator, that doesn't | |
485 | think to return the register size. Just assume all is ok. */ | |
56be3814 | 486 | regcache_raw_supply (regcache, regno, buf); |
ea35711c | 487 | if (remote_debug) |
8238d0bf AC |
488 | { |
489 | printf_filtered ("gdbsim_fetch_register: %d", regno); | |
490 | /* FIXME: We could print something more intelligible. */ | |
40a6adc1 | 491 | dump_mem (buf, register_size (gdbarch, regno)); |
8238d0bf AC |
492 | } |
493 | break; | |
494 | } | |
c906108c SS |
495 | } |
496 | } | |
497 | ||
498 | ||
499 | static void | |
28439f5e PA |
500 | gdbsim_store_register (struct target_ops *ops, |
501 | struct regcache *regcache, int regno) | |
c906108c | 502 | { |
40a6adc1 | 503 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
db04efe6 KB |
504 | struct sim_inferior_data *sim_data |
505 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NEEDED); | |
506 | ||
c5aa993b | 507 | if (regno == -1) |
c906108c | 508 | { |
40a6adc1 | 509 | for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++) |
28439f5e | 510 | gdbsim_store_register (ops, regcache, regno); |
8238d0bf | 511 | return; |
c906108c | 512 | } |
40a6adc1 | 513 | else if (gdbarch_register_sim_regno (gdbarch, regno) >= 0) |
c906108c | 514 | { |
5fda2332 | 515 | gdb_byte tmp[MAX_REGISTER_SIZE]; |
c906108c | 516 | int nr_bytes; |
123f5f96 | 517 | |
56be3814 | 518 | regcache_cooked_read (regcache, regno, tmp); |
db04efe6 | 519 | nr_bytes = sim_store_register (sim_data->gdbsim_desc, |
474c1661 | 520 | gdbarch_register_sim_regno |
40a6adc1 MD |
521 | (gdbarch, regno), |
522 | tmp, register_size (gdbarch, regno)); | |
523 | if (nr_bytes > 0 && nr_bytes != register_size (gdbarch, regno)) | |
8e65ff28 | 524 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 525 | _("Register size different to expected")); |
dae477fe AB |
526 | if (nr_bytes < 0) |
527 | internal_error (__FILE__, __LINE__, | |
528 | _("Register %d not updated"), regno); | |
529 | if (nr_bytes == 0) | |
530 | warning (_("Register %s not updated"), | |
531 | gdbarch_register_name (gdbarch, regno)); | |
532 | ||
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 | |
0df8b418 | 589 | a call to sim_create_inferior() should go here. */ |
c906108c | 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; | |
ddd60447 | 640 | |
2a7c8fd5 AB |
641 | if (!have_inferiors ()) |
642 | init_thread_list (); | |
643 | ||
ddd60447 MF |
644 | if (sim_create_inferior (sim_data->gdbsim_desc, exec_bfd, argv, env) |
645 | != SIM_RC_OK) | |
646 | error (_("Unable to create sim inferior.")); | |
c906108c | 647 | |
db04efe6 | 648 | inferior_ptid = sim_data->remote_sim_ptid; |
20176d8f | 649 | inferior_appeared (current_inferior (), ptid_get_pid (inferior_ptid)); |
9de2bdd7 PA |
650 | add_thread_silent (inferior_ptid); |
651 | ||
0df8b418 MS |
652 | insert_breakpoints (); /* Needed to get correct instruction |
653 | in cache. */ | |
c906108c SS |
654 | |
655 | clear_proceed_status (); | |
c906108c SS |
656 | } |
657 | ||
658 | /* The open routine takes the rest of the parameters from the command, | |
659 | and (if successful) pushes a new target onto the stack. | |
660 | Targets should supply this routine, if only to provide an error message. */ | |
0df8b418 | 661 | /* Called when selecting the simulator. E.g. (gdb) target sim name. */ |
c906108c SS |
662 | |
663 | static void | |
fba45db2 | 664 | gdbsim_open (char *args, int from_tty) |
c906108c SS |
665 | { |
666 | int len; | |
667 | char *arg_buf; | |
db04efe6 KB |
668 | struct sim_inferior_data *sim_data; |
669 | SIM_DESC gdbsim_desc; | |
c906108c | 670 | |
ea35711c | 671 | if (remote_debug) |
c906108c SS |
672 | printf_filtered ("gdbsim_open: args \"%s\"\n", args ? args : "(null)"); |
673 | ||
db04efe6 KB |
674 | /* Ensure that the sim target is not on the target stack. This is |
675 | necessary, because if it is on the target stack, the call to | |
676 | push_target below will invoke sim_close(), thus freeing various | |
677 | state (including a sim instance) that we allocate prior to | |
678 | invoking push_target(). We want to delay the push_target() | |
679 | operation until after we complete those operations which could | |
680 | error out. */ | |
681 | if (gdbsim_is_open) | |
c906108c SS |
682 | unpush_target (&gdbsim_ops); |
683 | ||
c5aa993b | 684 | len = (7 + 1 /* gdbsim */ |
c906108c SS |
685 | + strlen (" -E little") |
686 | + strlen (" --architecture=xxxxxxxxxx") | |
f4b8c29b | 687 | + strlen (" --sysroot=") + strlen (gdb_sysroot) + |
c906108c | 688 | + (args ? strlen (args) : 0) |
c5aa993b | 689 | + 50) /* slack */ ; |
c906108c | 690 | arg_buf = (char *) alloca (len); |
c5aa993b | 691 | strcpy (arg_buf, "gdbsim"); /* 7 */ |
b6d373df | 692 | /* Specify the byte order for the target when it is explicitly |
0df8b418 | 693 | specified by the user (not auto detected). */ |
b6d373df | 694 | switch (selected_byte_order ()) |
c906108c | 695 | { |
a8cf2722 AC |
696 | case BFD_ENDIAN_BIG: |
697 | strcat (arg_buf, " -E big"); | |
698 | break; | |
699 | case BFD_ENDIAN_LITTLE: | |
700 | strcat (arg_buf, " -E little"); | |
701 | break; | |
702 | case BFD_ENDIAN_UNKNOWN: | |
703 | break; | |
c906108c SS |
704 | } |
705 | /* Specify the architecture of the target when it has been | |
706 | explicitly specified */ | |
a8cf2722 | 707 | if (selected_architecture_name () != NULL) |
c906108c SS |
708 | { |
709 | strcat (arg_buf, " --architecture="); | |
a8cf2722 | 710 | strcat (arg_buf, selected_architecture_name ()); |
c906108c | 711 | } |
f4b8c29b MF |
712 | /* Pass along gdb's concept of the sysroot. */ |
713 | strcat (arg_buf, " --sysroot="); | |
714 | strcat (arg_buf, gdb_sysroot); | |
c906108c SS |
715 | /* finally, any explicit args */ |
716 | if (args) | |
717 | { | |
c5aa993b | 718 | strcat (arg_buf, " "); /* 1 */ |
c906108c SS |
719 | strcat (arg_buf, args); |
720 | } | |
db04efe6 | 721 | sim_argv = gdb_buildargv (arg_buf); |
c906108c SS |
722 | |
723 | init_callbacks (); | |
db04efe6 | 724 | gdbsim_desc = sim_open (SIM_OPEN_DEBUG, &gdb_callback, exec_bfd, sim_argv); |
c906108c SS |
725 | |
726 | if (gdbsim_desc == 0) | |
db04efe6 KB |
727 | { |
728 | freeargv (sim_argv); | |
729 | sim_argv = NULL; | |
730 | error (_("unable to create simulator instance")); | |
731 | } | |
732 | ||
733 | /* Reset the pid numberings for this batch of sim instances. */ | |
734 | next_pid = INITIAL_PID; | |
735 | ||
736 | /* Allocate the inferior data, but do not allocate a sim instance | |
737 | since we've already just done that. */ | |
0df8b418 MS |
738 | sim_data = get_sim_inferior_data (current_inferior (), |
739 | SIM_INSTANCE_NOT_NEEDED); | |
db04efe6 KB |
740 | |
741 | sim_data->gdbsim_desc = gdbsim_desc; | |
c906108c SS |
742 | |
743 | push_target (&gdbsim_ops); | |
c906108c | 744 | printf_filtered ("Connected to the simulator.\n"); |
52bb452f DJ |
745 | |
746 | /* There's nothing running after "target sim" or "load"; not until | |
747 | "run". */ | |
748 | inferior_ptid = null_ptid; | |
db04efe6 KB |
749 | |
750 | gdbsim_is_open = 1; | |
751 | } | |
752 | ||
753 | /* Callback for iterate_over_inferiors. Called (indirectly) by | |
754 | gdbsim_close(). */ | |
755 | ||
756 | static int | |
757 | gdbsim_close_inferior (struct inferior *inf, void *arg) | |
758 | { | |
759 | struct sim_inferior_data *sim_data = inferior_data (inf, | |
760 | sim_inferior_data_key); | |
761 | if (sim_data != NULL) | |
762 | { | |
763 | ptid_t ptid = sim_data->remote_sim_ptid; | |
764 | ||
765 | sim_inferior_data_cleanup (inf, sim_data); | |
766 | set_inferior_data (inf, sim_inferior_data_key, NULL); | |
767 | ||
768 | /* Having a ptid allocated and stored in remote_sim_ptid does | |
0df8b418 | 769 | not mean that a corresponding inferior was ever created. |
db04efe6 KB |
770 | Thus we need to verify the existence of an inferior using the |
771 | pid in question before setting inferior_ptid via | |
772 | switch_to_thread() or mourning the inferior. */ | |
773 | if (find_inferior_pid (ptid_get_pid (ptid)) != NULL) | |
774 | { | |
775 | switch_to_thread (ptid); | |
776 | generic_mourn_inferior (); | |
777 | } | |
778 | } | |
779 | ||
780 | return 0; | |
c906108c SS |
781 | } |
782 | ||
0df8b418 | 783 | /* Close out all files and local state before this target loses control. */ |
c906108c SS |
784 | |
785 | static void | |
460014f5 | 786 | gdbsim_close (void) |
c906108c | 787 | { |
db04efe6 KB |
788 | struct sim_inferior_data *sim_data |
789 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
790 | ||
ea35711c | 791 | if (remote_debug) |
460014f5 | 792 | printf_filtered ("gdbsim_close\n"); |
c906108c | 793 | |
db04efe6 | 794 | iterate_over_inferiors (gdbsim_close_inferior, NULL); |
c906108c | 795 | |
db04efe6 | 796 | if (sim_argv != NULL) |
c906108c | 797 | { |
db04efe6 KB |
798 | freeargv (sim_argv); |
799 | sim_argv = NULL; | |
c906108c SS |
800 | } |
801 | ||
802 | end_callbacks (); | |
db04efe6 KB |
803 | |
804 | gdbsim_is_open = 0; | |
c906108c SS |
805 | } |
806 | ||
807 | /* Takes a program previously attached to and detaches it. | |
808 | The program may resume execution (some targets do, some don't) and will | |
809 | no longer stop on signals, etc. We better not have left any breakpoints | |
810 | in the program or it'll die when it hits one. ARGS is arguments | |
811 | typed by the user (e.g. a signal to send the process). FROM_TTY | |
812 | says whether to be verbose or not. */ | |
813 | /* Terminate the open connection to the remote debugger. | |
814 | Use this when you want to detach and do something else with your gdb. */ | |
815 | ||
816 | static void | |
136d6dae | 817 | gdbsim_detach (struct target_ops *ops, char *args, int from_tty) |
c906108c | 818 | { |
ea35711c | 819 | if (remote_debug) |
c906108c SS |
820 | printf_filtered ("gdbsim_detach: args \"%s\"\n", args); |
821 | ||
7fdc1521 | 822 | unpush_target (ops); /* calls gdbsim_close to do the real work */ |
c906108c SS |
823 | if (from_tty) |
824 | printf_filtered ("Ending simulator %s debugging\n", target_shortname); | |
825 | } | |
c5aa993b | 826 | |
c906108c SS |
827 | /* Resume execution of the target process. STEP says whether to single-step |
828 | or to run free; SIGGNAL is the signal value (e.g. SIGINT) to be given | |
829 | to the target, or zero for no signal. */ | |
830 | ||
db04efe6 KB |
831 | struct resume_data |
832 | { | |
2ea28649 | 833 | enum gdb_signal siggnal; |
db04efe6 KB |
834 | int step; |
835 | }; | |
836 | ||
837 | static int | |
838 | gdbsim_resume_inferior (struct inferior *inf, void *arg) | |
839 | { | |
840 | struct sim_inferior_data *sim_data | |
841 | = get_sim_inferior_data (inf, SIM_INSTANCE_NOT_NEEDED); | |
842 | struct resume_data *rd = arg; | |
843 | ||
844 | if (sim_data) | |
845 | { | |
846 | sim_data->resume_siggnal = rd->siggnal; | |
847 | sim_data->resume_step = rd->step; | |
848 | ||
849 | if (remote_debug) | |
850 | printf_filtered (_("gdbsim_resume: pid %d, step %d, signal %d\n"), | |
851 | inf->pid, rd->step, rd->siggnal); | |
852 | } | |
853 | ||
854 | /* When called from iterate_over_inferiors, a zero return causes the | |
855 | iteration process to proceed until there are no more inferiors to | |
856 | consider. */ | |
857 | return 0; | |
858 | } | |
c906108c SS |
859 | |
860 | static void | |
2fb89e62 | 861 | gdbsim_resume (struct target_ops *ops, |
2ea28649 | 862 | ptid_t ptid, int step, enum gdb_signal siggnal) |
c906108c | 863 | { |
db04efe6 KB |
864 | struct resume_data rd; |
865 | struct sim_inferior_data *sim_data | |
866 | = get_sim_inferior_data_by_ptid (ptid, SIM_INSTANCE_NOT_NEEDED); | |
867 | ||
868 | rd.siggnal = siggnal; | |
869 | rd.step = step; | |
870 | ||
0df8b418 | 871 | /* We don't access any sim_data members within this function. |
db04efe6 KB |
872 | What's of interest is whether or not the call to |
873 | get_sim_inferior_data_by_ptid(), above, is able to obtain a | |
874 | non-NULL pointer. If it managed to obtain a non-NULL pointer, we | |
875 | know we have a single inferior to consider. If it's NULL, we | |
876 | either have multiple inferiors to resume or an error condition. */ | |
877 | ||
878 | if (sim_data) | |
879 | gdbsim_resume_inferior (find_inferior_pid (ptid_get_pid (ptid)), &rd); | |
880 | else if (ptid_equal (ptid, minus_one_ptid)) | |
881 | iterate_over_inferiors (gdbsim_resume_inferior, &rd); | |
882 | else | |
8a3fe4f8 | 883 | error (_("The program is not being run.")); |
c906108c SS |
884 | } |
885 | ||
886 | /* Notify the simulator of an asynchronous request to stop. | |
c5aa993b | 887 | |
c906108c SS |
888 | The simulator shall ensure that the stop request is eventually |
889 | delivered to the simulator. If the call is made while the | |
890 | simulator is not running then the stop request is processed when | |
891 | the simulator is next resumed. | |
892 | ||
db04efe6 KB |
893 | For simulators that do not support this operation, just abort. */ |
894 | ||
895 | static int | |
896 | gdbsim_stop_inferior (struct inferior *inf, void *arg) | |
897 | { | |
898 | struct sim_inferior_data *sim_data | |
899 | = get_sim_inferior_data (inf, SIM_INSTANCE_NEEDED); | |
900 | ||
901 | if (sim_data) | |
902 | { | |
903 | if (!sim_stop (sim_data->gdbsim_desc)) | |
904 | { | |
905 | quit (); | |
906 | } | |
907 | } | |
908 | ||
909 | /* When called from iterate_over_inferiors, a zero return causes the | |
910 | iteration process to proceed until there are no more inferiors to | |
911 | consider. */ | |
912 | return 0; | |
913 | } | |
c906108c SS |
914 | |
915 | static void | |
f9c72d52 | 916 | gdbsim_stop (ptid_t ptid) |
c906108c | 917 | { |
db04efe6 KB |
918 | struct sim_inferior_data *sim_data; |
919 | ||
920 | if (ptid_equal (ptid, minus_one_ptid)) | |
c906108c | 921 | { |
db04efe6 KB |
922 | iterate_over_inferiors (gdbsim_stop_inferior, NULL); |
923 | } | |
924 | else | |
925 | { | |
926 | struct inferior *inf = find_inferior_pid (ptid_get_pid (ptid)); | |
927 | ||
928 | if (inf == NULL) | |
0df8b418 MS |
929 | error (_("Can't stop pid %d. No inferior found."), |
930 | ptid_get_pid (ptid)); | |
db04efe6 KB |
931 | |
932 | gdbsim_stop_inferior (inf, NULL); | |
c906108c SS |
933 | } |
934 | } | |
935 | ||
936 | /* GDB version of os_poll_quit callback. | |
8a0ce09a | 937 | Taken from gdb/util.c - should be in a library. */ |
c906108c SS |
938 | |
939 | static int | |
fba45db2 | 940 | gdb_os_poll_quit (host_callback *p) |
c906108c | 941 | { |
98bbd631 AC |
942 | if (deprecated_ui_loop_hook != NULL) |
943 | deprecated_ui_loop_hook (0); | |
7a292a7a | 944 | |
522002f9 | 945 | if (check_quit_flag ()) /* gdb's idea of quit */ |
c906108c | 946 | { |
522002f9 | 947 | clear_quit_flag (); /* we've stolen it */ |
c906108c SS |
948 | return 1; |
949 | } | |
c906108c SS |
950 | return 0; |
951 | } | |
952 | ||
953 | /* Wait for inferior process to do something. Return pid of child, | |
954 | or -1 in case of error; store status through argument pointer STATUS, | |
0df8b418 | 955 | just as `wait' would. */ |
c906108c SS |
956 | |
957 | static void | |
fba45db2 | 958 | gdbsim_cntrl_c (int signo) |
c906108c | 959 | { |
db04efe6 | 960 | gdbsim_stop (minus_one_ptid); |
c906108c SS |
961 | } |
962 | ||
39f77062 | 963 | static ptid_t |
117de6a9 | 964 | gdbsim_wait (struct target_ops *ops, |
47608cb1 | 965 | ptid_t ptid, struct target_waitstatus *status, int options) |
c906108c | 966 | { |
db04efe6 | 967 | struct sim_inferior_data *sim_data; |
c906108c SS |
968 | static RETSIGTYPE (*prev_sigint) (); |
969 | int sigrc = 0; | |
970 | enum sim_stop reason = sim_running; | |
971 | ||
db04efe6 KB |
972 | /* This target isn't able to (yet) resume more than one inferior at a time. |
973 | When ptid is minus_one_ptid, just use the current inferior. If we're | |
974 | given an explicit pid, we'll try to find it and use that instead. */ | |
975 | if (ptid_equal (ptid, minus_one_ptid)) | |
0df8b418 MS |
976 | sim_data = get_sim_inferior_data (current_inferior (), |
977 | SIM_INSTANCE_NEEDED); | |
db04efe6 KB |
978 | else |
979 | { | |
980 | sim_data = get_sim_inferior_data_by_ptid (ptid, SIM_INSTANCE_NEEDED); | |
981 | if (sim_data == NULL) | |
982 | error (_("Unable to wait for pid %d. Inferior not found."), | |
983 | ptid_get_pid (ptid)); | |
984 | inferior_ptid = ptid; | |
985 | } | |
986 | ||
ea35711c | 987 | if (remote_debug) |
c906108c SS |
988 | printf_filtered ("gdbsim_wait\n"); |
989 | ||
990 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) | |
991 | { | |
992 | struct sigaction sa, osa; | |
993 | sa.sa_handler = gdbsim_cntrl_c; | |
994 | sigemptyset (&sa.sa_mask); | |
995 | sa.sa_flags = 0; | |
996 | sigaction (SIGINT, &sa, &osa); | |
997 | prev_sigint = osa.sa_handler; | |
998 | } | |
999 | #else | |
1000 | prev_sigint = signal (SIGINT, gdbsim_cntrl_c); | |
1001 | #endif | |
db04efe6 KB |
1002 | sim_resume (sim_data->gdbsim_desc, sim_data->resume_step, |
1003 | sim_data->resume_siggnal); | |
1004 | ||
c906108c | 1005 | signal (SIGINT, prev_sigint); |
db04efe6 | 1006 | sim_data->resume_step = 0; |
c906108c | 1007 | |
db04efe6 | 1008 | sim_stop_reason (sim_data->gdbsim_desc, &reason, &sigrc); |
c906108c SS |
1009 | |
1010 | switch (reason) | |
1011 | { | |
1012 | case sim_exited: | |
1013 | status->kind = TARGET_WAITKIND_EXITED; | |
1014 | status->value.integer = sigrc; | |
1015 | break; | |
1016 | case sim_stopped: | |
1017 | switch (sigrc) | |
1018 | { | |
a493e3e2 | 1019 | case GDB_SIGNAL_ABRT: |
c906108c SS |
1020 | quit (); |
1021 | break; | |
a493e3e2 PA |
1022 | case GDB_SIGNAL_INT: |
1023 | case GDB_SIGNAL_TRAP: | |
c906108c SS |
1024 | default: |
1025 | status->kind = TARGET_WAITKIND_STOPPED; | |
aba6488e | 1026 | status->value.sig = sigrc; |
c906108c SS |
1027 | break; |
1028 | } | |
1029 | break; | |
1030 | case sim_signalled: | |
1031 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
aba6488e | 1032 | status->value.sig = sigrc; |
c906108c SS |
1033 | break; |
1034 | case sim_running: | |
1035 | case sim_polling: | |
0df8b418 | 1036 | /* FIXME: Is this correct? */ |
c906108c SS |
1037 | break; |
1038 | } | |
1039 | ||
39f77062 | 1040 | return inferior_ptid; |
c906108c SS |
1041 | } |
1042 | ||
1043 | /* Get ready to modify the registers array. On machines which store | |
1044 | individual registers, this doesn't need to do anything. On machines | |
1045 | which store all the registers in one fell swoop, this makes sure | |
1046 | that registers contains all the registers from the program being | |
1047 | debugged. */ | |
1048 | ||
1049 | static void | |
316f2060 | 1050 | gdbsim_prepare_to_store (struct regcache *regcache) |
c906108c | 1051 | { |
0df8b418 | 1052 | /* Do nothing, since we can store individual regs. */ |
c906108c SS |
1053 | } |
1054 | ||
146ec4db PA |
1055 | /* Helper for gdbsim_xfer_partial that handles memory transfers. |
1056 | Arguments are like target_xfer_partial. */ | |
d93bce06 | 1057 | |
146ec4db PA |
1058 | static LONGEST |
1059 | gdbsim_xfer_memory (struct target_ops *target, | |
1060 | gdb_byte *readbuf, const gdb_byte *writebuf, | |
1061 | ULONGEST memaddr, LONGEST len) | |
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) |
fcde0081 | 1084 | fprintf_unfiltered (gdb_stdlog, |
146ec4db PA |
1085 | "gdbsim_xfer_memory: readbuf %s, writebuf %s, " |
1086 | "memaddr %s, len %s\n", | |
1087 | host_address_to_string (readbuf), | |
1088 | host_address_to_string (writebuf), | |
fcde0081 | 1089 | paddress (target_gdbarch (), memaddr), |
146ec4db | 1090 | plongest (len)); |
c906108c | 1091 | |
146ec4db | 1092 | if (writebuf) |
c906108c | 1093 | { |
fcde0081 | 1094 | if (remote_debug && len > 0) |
146ec4db PA |
1095 | dump_mem (writebuf, len); |
1096 | len = sim_write (sim_data->gdbsim_desc, memaddr, writebuf, len); | |
c906108c | 1097 | } |
c5aa993b | 1098 | else |
c906108c | 1099 | { |
146ec4db | 1100 | len = sim_read (sim_data->gdbsim_desc, memaddr, readbuf, len); |
ea35711c | 1101 | if (remote_debug && len > 0) |
146ec4db | 1102 | dump_mem (readbuf, len); |
c5aa993b | 1103 | } |
c906108c SS |
1104 | return len; |
1105 | } | |
1106 | ||
146ec4db PA |
1107 | /* Target to_xfer_partial implementation. */ |
1108 | ||
1109 | static LONGEST | |
1110 | gdbsim_xfer_partial (struct target_ops *ops, enum target_object object, | |
1111 | const char *annex, gdb_byte *readbuf, | |
1112 | const gdb_byte *writebuf, ULONGEST offset, LONGEST len) | |
1113 | { | |
1114 | switch (object) | |
1115 | { | |
1116 | case TARGET_OBJECT_MEMORY: | |
1117 | return gdbsim_xfer_memory (ops, readbuf, writebuf, offset, len); | |
1118 | ||
1119 | default: | |
1120 | return -1; | |
1121 | } | |
1122 | } | |
1123 | ||
c906108c | 1124 | static void |
fba45db2 | 1125 | gdbsim_files_info (struct target_ops *target) |
c906108c | 1126 | { |
db04efe6 KB |
1127 | struct sim_inferior_data *sim_data |
1128 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NEEDED); | |
0d18d720 | 1129 | const char *file = "nothing"; |
c906108c SS |
1130 | |
1131 | if (exec_bfd) | |
1132 | file = bfd_get_filename (exec_bfd); | |
1133 | ||
ea35711c | 1134 | if (remote_debug) |
c906108c SS |
1135 | printf_filtered ("gdbsim_files_info: file \"%s\"\n", file); |
1136 | ||
1137 | if (exec_bfd) | |
1138 | { | |
1139 | printf_filtered ("\tAttached to %s running program %s\n", | |
1140 | target_shortname, file); | |
db04efe6 | 1141 | sim_info (sim_data->gdbsim_desc, 0); |
c906108c SS |
1142 | } |
1143 | } | |
1144 | ||
1145 | /* Clear the simulator's notion of what the break points are. */ | |
1146 | ||
1147 | static void | |
3c8b2eda | 1148 | gdbsim_mourn_inferior (struct target_ops *target) |
c5aa993b | 1149 | { |
db04efe6 KB |
1150 | struct sim_inferior_data *sim_data |
1151 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
1152 | ||
ea35711c | 1153 | if (remote_debug) |
c906108c SS |
1154 | printf_filtered ("gdbsim_mourn_inferior:\n"); |
1155 | ||
1156 | remove_breakpoints (); | |
1157 | generic_mourn_inferior (); | |
db04efe6 | 1158 | delete_thread_silent (sim_data->remote_sim_ptid); |
c906108c SS |
1159 | } |
1160 | ||
c906108c SS |
1161 | /* Pass the command argument through to the simulator verbatim. The |
1162 | simulator must do any command interpretation work. */ | |
1163 | ||
1164 | void | |
fba45db2 | 1165 | simulator_command (char *args, int from_tty) |
c906108c | 1166 | { |
db04efe6 KB |
1167 | struct sim_inferior_data *sim_data; |
1168 | ||
1169 | /* We use inferior_data() instead of get_sim_inferior_data() here in | |
1170 | order to avoid attaching a sim_inferior_data struct to an | |
1171 | inferior unnecessarily. The reason we take such care here is due | |
1172 | to the fact that this function, simulator_command(), may be called | |
1173 | even when the sim target is not active. If we were to use | |
1174 | get_sim_inferior_data() here, it is possible that this call would | |
1175 | be made either prior to gdbsim_open() or after gdbsim_close(), | |
1176 | thus allocating memory that would not be garbage collected until | |
1177 | the ultimate destruction of the associated inferior. */ | |
1178 | ||
1179 | sim_data = inferior_data (current_inferior (), sim_inferior_data_key); | |
1180 | if (sim_data == NULL || sim_data->gdbsim_desc == NULL) | |
c906108c SS |
1181 | { |
1182 | ||
1183 | /* PREVIOUSLY: The user may give a command before the simulator | |
1184 | is opened. [...] (??? assuming of course one wishes to | |
1185 | continue to allow commands to be sent to unopened simulators, | |
0df8b418 | 1186 | which isn't entirely unreasonable). */ |
c906108c SS |
1187 | |
1188 | /* The simulator is a builtin abstraction of a remote target. | |
1189 | Consistent with that model, access to the simulator, via sim | |
1190 | commands, is restricted to the period when the channel to the | |
0df8b418 | 1191 | simulator is open. */ |
c906108c | 1192 | |
8a3fe4f8 | 1193 | error (_("Not connected to the simulator target")); |
c906108c SS |
1194 | } |
1195 | ||
db04efe6 | 1196 | sim_do_command (sim_data->gdbsim_desc, args); |
c906108c SS |
1197 | |
1198 | /* Invalidate the register cache, in case the simulator command does | |
0df8b418 | 1199 | something funny. */ |
c5aa993b | 1200 | registers_changed (); |
c906108c SS |
1201 | } |
1202 | ||
34370865 | 1203 | static VEC (char_ptr) * |
3cb2ab1a SE |
1204 | sim_command_completer (struct cmd_list_element *ignore, const char *text, |
1205 | const char *word) | |
56a9aa1d MF |
1206 | { |
1207 | struct sim_inferior_data *sim_data; | |
34370865 JB |
1208 | char **tmp; |
1209 | int i; | |
09d5912c | 1210 | VEC (char_ptr) *result = NULL; |
56a9aa1d MF |
1211 | |
1212 | sim_data = inferior_data (current_inferior (), sim_inferior_data_key); | |
1213 | if (sim_data == NULL || sim_data->gdbsim_desc == NULL) | |
1214 | return NULL; | |
1215 | ||
34370865 JB |
1216 | tmp = sim_complete_command (sim_data->gdbsim_desc, text, word); |
1217 | if (tmp == NULL) | |
1218 | return NULL; | |
1219 | ||
1220 | /* Transform the array into a VEC, and then free the array. */ | |
1221 | for (i = 0; tmp[i] != NULL; i++) | |
1222 | VEC_safe_push (char_ptr, result, tmp[i]); | |
1223 | xfree (tmp); | |
1224 | ||
1225 | return result; | |
56a9aa1d MF |
1226 | } |
1227 | ||
9de2bdd7 PA |
1228 | /* Check to see if a thread is still alive. */ |
1229 | ||
1230 | static int | |
28439f5e | 1231 | gdbsim_thread_alive (struct target_ops *ops, ptid_t ptid) |
9de2bdd7 | 1232 | { |
db04efe6 KB |
1233 | struct sim_inferior_data *sim_data |
1234 | = get_sim_inferior_data_by_ptid (ptid, SIM_INSTANCE_NOT_NEEDED); | |
1235 | ||
1236 | if (sim_data == NULL) | |
1237 | return 0; | |
1238 | ||
1239 | if (ptid_equal (ptid, sim_data->remote_sim_ptid)) | |
9de2bdd7 PA |
1240 | /* The simulators' task is always alive. */ |
1241 | return 1; | |
1242 | ||
1243 | return 0; | |
1244 | } | |
1245 | ||
1246 | /* Convert a thread ID to a string. Returns the string in a static | |
1247 | buffer. */ | |
1248 | ||
1249 | static char * | |
117de6a9 | 1250 | gdbsim_pid_to_str (struct target_ops *ops, ptid_t ptid) |
9de2bdd7 | 1251 | { |
9de2bdd7 PA |
1252 | return normal_pid_to_str (ptid); |
1253 | } | |
1254 | ||
0c012db1 KB |
1255 | /* Simulator memory may be accessed after the program has been loaded. */ |
1256 | ||
b261e0c5 | 1257 | static int |
0c012db1 KB |
1258 | gdbsim_has_all_memory (struct target_ops *ops) |
1259 | { | |
1260 | struct sim_inferior_data *sim_data | |
1261 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
1262 | ||
1263 | if (!sim_data->program_loaded) | |
1264 | return 0; | |
1265 | ||
1266 | return 1; | |
1267 | } | |
1268 | ||
b261e0c5 | 1269 | static int |
0c012db1 KB |
1270 | gdbsim_has_memory (struct target_ops *ops) |
1271 | { | |
1272 | struct sim_inferior_data *sim_data | |
1273 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
1274 | ||
1275 | if (!sim_data->program_loaded) | |
1276 | return 0; | |
1277 | ||
1278 | return 1; | |
1279 | } | |
1280 | ||
0df8b418 | 1281 | /* Define the target subroutine names. */ |
c906108c | 1282 | |
c5aa993b JM |
1283 | struct target_ops gdbsim_ops; |
1284 | ||
1285 | static void | |
1286 | init_gdbsim_ops (void) | |
1287 | { | |
1288 | gdbsim_ops.to_shortname = "sim"; | |
1289 | gdbsim_ops.to_longname = "simulator"; | |
1290 | gdbsim_ops.to_doc = "Use the compiled-in simulator."; | |
1291 | gdbsim_ops.to_open = gdbsim_open; | |
1292 | gdbsim_ops.to_close = gdbsim_close; | |
c5aa993b | 1293 | gdbsim_ops.to_detach = gdbsim_detach; |
c5aa993b JM |
1294 | gdbsim_ops.to_resume = gdbsim_resume; |
1295 | gdbsim_ops.to_wait = gdbsim_wait; | |
c5aa993b JM |
1296 | gdbsim_ops.to_fetch_registers = gdbsim_fetch_register; |
1297 | gdbsim_ops.to_store_registers = gdbsim_store_register; | |
1298 | gdbsim_ops.to_prepare_to_store = gdbsim_prepare_to_store; | |
146ec4db | 1299 | gdbsim_ops.to_xfer_partial = gdbsim_xfer_partial; |
c5aa993b | 1300 | gdbsim_ops.to_files_info = gdbsim_files_info; |
8181d85f DJ |
1301 | gdbsim_ops.to_insert_breakpoint = memory_insert_breakpoint; |
1302 | gdbsim_ops.to_remove_breakpoint = memory_remove_breakpoint; | |
c5aa993b JM |
1303 | gdbsim_ops.to_kill = gdbsim_kill; |
1304 | gdbsim_ops.to_load = gdbsim_load; | |
c5aa993b | 1305 | gdbsim_ops.to_create_inferior = gdbsim_create_inferior; |
c5aa993b | 1306 | gdbsim_ops.to_mourn_inferior = gdbsim_mourn_inferior; |
c5aa993b | 1307 | gdbsim_ops.to_stop = gdbsim_stop; |
9de2bdd7 PA |
1308 | gdbsim_ops.to_thread_alive = gdbsim_thread_alive; |
1309 | gdbsim_ops.to_pid_to_str = gdbsim_pid_to_str; | |
c5aa993b | 1310 | gdbsim_ops.to_stratum = process_stratum; |
0c012db1 KB |
1311 | gdbsim_ops.to_has_all_memory = gdbsim_has_all_memory; |
1312 | gdbsim_ops.to_has_memory = gdbsim_has_memory; | |
c35b1492 PA |
1313 | gdbsim_ops.to_has_stack = default_child_has_stack; |
1314 | gdbsim_ops.to_has_registers = default_child_has_registers; | |
1315 | gdbsim_ops.to_has_execution = default_child_has_execution; | |
c5aa993b | 1316 | gdbsim_ops.to_magic = OPS_MAGIC; |
c906108c SS |
1317 | } |
1318 | ||
1319 | void | |
fba45db2 | 1320 | _initialize_remote_sim (void) |
c906108c | 1321 | { |
56a9aa1d MF |
1322 | struct cmd_list_element *c; |
1323 | ||
c5aa993b | 1324 | init_gdbsim_ops (); |
c906108c SS |
1325 | add_target (&gdbsim_ops); |
1326 | ||
56a9aa1d MF |
1327 | c = add_com ("sim", class_obscure, simulator_command, |
1328 | _("Send a command to the simulator.")); | |
1329 | set_cmd_completer (c, sim_command_completer); | |
9de2bdd7 | 1330 | |
db04efe6 | 1331 | sim_inferior_data_key |
c5d9b215 | 1332 | = register_inferior_data_with_cleanup (NULL, sim_inferior_data_cleanup); |
c906108c | 1333 | } |