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" |
a4d1e79a | 43 | #include "common/byte-vector.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 | |
9cbe5fff TT |
75 | static void gdbsim_load (struct target_ops *self, const char *prog, |
76 | int fromtty); | |
c906108c | 77 | |
74228e77 | 78 | static void gdbsim_open (const char *args, int from_tty); |
c906108c | 79 | |
de90e03d | 80 | static void gdbsim_close (struct target_ops *self); |
c906108c | 81 | |
8ca5801b JB |
82 | static void gdbsim_detach (struct target_ops *ops, const char *args, |
83 | int from_tty); | |
c906108c | 84 | |
f32dbf8c MM |
85 | static void gdbsim_prepare_to_store (struct target_ops *self, |
86 | struct regcache *regcache); | |
c906108c | 87 | |
a14ed312 | 88 | static void gdbsim_files_info (struct target_ops *target); |
c906108c | 89 | |
3c8b2eda | 90 | static void gdbsim_mourn_inferior (struct target_ops *target); |
c906108c | 91 | |
bfedc46a | 92 | static void gdbsim_interrupt (struct target_ops *self, ptid_t ptid); |
c906108c | 93 | |
a14ed312 | 94 | void simulator_command (char *args, int from_tty); |
c906108c SS |
95 | |
96 | /* Naming convention: | |
97 | ||
98 | sim_* are the interface to the simulator (see remote-sim.h). | |
99 | gdbsim_* are stuff which is internal to gdb. */ | |
100 | ||
101 | /* Forward data declarations */ | |
102 | extern struct target_ops gdbsim_ops; | |
103 | ||
db04efe6 KB |
104 | static const struct inferior_data *sim_inferior_data_key; |
105 | ||
106 | /* Simulator-specific, per-inferior state. */ | |
107 | struct sim_inferior_data { | |
108 | /* Flag which indicates whether or not the program has been loaded. */ | |
109 | int program_loaded; | |
110 | ||
111 | /* Simulator descriptor for this inferior. */ | |
112 | SIM_DESC gdbsim_desc; | |
113 | ||
114 | /* This is the ptid we use for this particular simulator instance. Its | |
115 | value is somewhat arbitrary, as the simulator target don't have a | |
116 | notion of tasks or threads, but we need something non-null to place | |
117 | in inferior_ptid. For simulators which permit multiple instances, | |
118 | we also need a unique identifier to use for each inferior. */ | |
119 | ptid_t remote_sim_ptid; | |
120 | ||
121 | /* Signal with which to resume. */ | |
2ea28649 | 122 | enum gdb_signal resume_siggnal; |
db04efe6 KB |
123 | |
124 | /* Flag which indicates whether resume should step or not. */ | |
125 | int resume_step; | |
126 | }; | |
127 | ||
128 | /* Flag indicating the "open" status of this module. It's set to 1 | |
129 | in gdbsim_open() and 0 in gdbsim_close(). */ | |
130 | static int gdbsim_is_open = 0; | |
131 | ||
132 | /* Value of the next pid to allocate for an inferior. As indicated | |
133 | elsewhere, its initial value is somewhat arbitrary; it's critical | |
134 | though that it's not zero or negative. */ | |
135 | static int next_pid; | |
136 | #define INITIAL_PID 42000 | |
137 | ||
138 | /* Argument list to pass to sim_open(). It is allocated in gdbsim_open() | |
139 | and deallocated in gdbsim_close(). The lifetime needs to extend beyond | |
140 | the call to gdbsim_open() due to the fact that other sim instances other | |
141 | than the first will be allocated after the gdbsim_open() call. */ | |
142 | static char **sim_argv = NULL; | |
143 | ||
144 | /* OS-level callback functions for write, flush, etc. */ | |
145 | static host_callback gdb_callback; | |
146 | static int callbacks_initialized = 0; | |
147 | ||
148 | /* Callback for iterate_over_inferiors. It checks to see if the sim | |
149 | descriptor passed via ARG is the same as that for the inferior | |
150 | designated by INF. Return true if so; false otherwise. */ | |
151 | ||
152 | static int | |
153 | check_for_duplicate_sim_descriptor (struct inferior *inf, void *arg) | |
154 | { | |
155 | struct sim_inferior_data *sim_data; | |
653090d3 | 156 | SIM_DESC new_sim_desc = (SIM_DESC) arg; |
db04efe6 | 157 | |
653090d3 SM |
158 | sim_data = ((struct sim_inferior_data *) |
159 | inferior_data (inf, sim_inferior_data_key)); | |
db04efe6 KB |
160 | |
161 | return (sim_data != NULL && sim_data->gdbsim_desc == new_sim_desc); | |
162 | } | |
163 | ||
164 | /* Flags indicating whether or not a sim instance is needed. One of these | |
165 | flags should be passed to get_sim_inferior_data(). */ | |
166 | ||
167 | enum {SIM_INSTANCE_NOT_NEEDED = 0, SIM_INSTANCE_NEEDED = 1}; | |
168 | ||
169 | /* Obtain pointer to per-inferior simulator data, allocating it if necessary. | |
170 | Attempt to open the sim if SIM_INSTANCE_NEEDED is true. */ | |
171 | ||
172 | static struct sim_inferior_data * | |
173 | get_sim_inferior_data (struct inferior *inf, int sim_instance_needed) | |
174 | { | |
175 | SIM_DESC sim_desc = NULL; | |
176 | struct sim_inferior_data *sim_data | |
653090d3 | 177 | = (struct sim_inferior_data *) inferior_data (inf, sim_inferior_data_key); |
db04efe6 KB |
178 | |
179 | /* Try to allocate a new sim instance, if needed. We do this ahead of | |
180 | a potential allocation of a sim_inferior_data struct in order to | |
181 | avoid needlessly allocating that struct in the event that the sim | |
182 | instance allocation fails. */ | |
74228e77 | 183 | if (sim_instance_needed == SIM_INSTANCE_NEEDED |
db04efe6 KB |
184 | && (sim_data == NULL || sim_data->gdbsim_desc == NULL)) |
185 | { | |
186 | struct inferior *idup; | |
187 | sim_desc = sim_open (SIM_OPEN_DEBUG, &gdb_callback, exec_bfd, sim_argv); | |
188 | if (sim_desc == NULL) | |
189 | error (_("Unable to create simulator instance for inferior %d."), | |
190 | inf->num); | |
191 | ||
192 | idup = iterate_over_inferiors (check_for_duplicate_sim_descriptor, | |
74228e77 | 193 | sim_desc); |
db04efe6 KB |
194 | if (idup != NULL) |
195 | { | |
196 | /* We don't close the descriptor due to the fact that it's | |
197 | shared with some other inferior. If we were to close it, | |
198 | that might needlessly muck up the other inferior. Of | |
199 | course, it's possible that the damage has already been | |
200 | done... Note that it *will* ultimately be closed during | |
201 | cleanup of the other inferior. */ | |
202 | sim_desc = NULL; | |
203 | error ( | |
204 | _("Inferior %d and inferior %d would have identical simulator state.\n" | |
205 | "(This simulator does not support the running of more than one inferior.)"), | |
74228e77 RM |
206 | inf->num, idup->num); |
207 | } | |
db04efe6 KB |
208 | } |
209 | ||
210 | if (sim_data == NULL) | |
211 | { | |
41bf6aca | 212 | sim_data = XCNEW(struct sim_inferior_data); |
db04efe6 KB |
213 | set_inferior_data (inf, sim_inferior_data_key, sim_data); |
214 | ||
215 | /* Allocate a ptid for this inferior. */ | |
216 | sim_data->remote_sim_ptid = ptid_build (next_pid, 0, next_pid); | |
217 | next_pid++; | |
218 | ||
219 | /* Initialize the other instance variables. */ | |
220 | sim_data->program_loaded = 0; | |
221 | sim_data->gdbsim_desc = sim_desc; | |
a493e3e2 | 222 | sim_data->resume_siggnal = GDB_SIGNAL_0; |
db04efe6 KB |
223 | sim_data->resume_step = 0; |
224 | } | |
225 | else if (sim_desc) | |
226 | { | |
227 | /* This handles the case where sim_data was allocated prior to | |
74228e77 | 228 | needing a sim instance. */ |
db04efe6 KB |
229 | sim_data->gdbsim_desc = sim_desc; |
230 | } | |
c906108c | 231 | |
c906108c | 232 | |
db04efe6 KB |
233 | return sim_data; |
234 | } | |
235 | ||
236 | /* Return pointer to per-inferior simulator data using PTID to find the | |
237 | inferior in question. Return NULL when no inferior is found or | |
238 | when ptid has a zero or negative pid component. */ | |
239 | ||
240 | static struct sim_inferior_data * | |
241 | get_sim_inferior_data_by_ptid (ptid_t ptid, int sim_instance_needed) | |
242 | { | |
243 | struct inferior *inf; | |
244 | int pid = ptid_get_pid (ptid); | |
245 | ||
246 | if (pid <= 0) | |
247 | return NULL; | |
74228e77 | 248 | |
db04efe6 KB |
249 | inf = find_inferior_pid (pid); |
250 | ||
251 | if (inf) | |
252 | return get_sim_inferior_data (inf, sim_instance_needed); | |
253 | else | |
254 | return NULL; | |
255 | } | |
256 | ||
257 | /* Free the per-inferior simulator data. */ | |
258 | ||
259 | static void | |
260 | sim_inferior_data_cleanup (struct inferior *inf, void *data) | |
261 | { | |
653090d3 | 262 | struct sim_inferior_data *sim_data = (struct sim_inferior_data *) data; |
db04efe6 KB |
263 | |
264 | if (sim_data != NULL) | |
265 | { | |
266 | if (sim_data->gdbsim_desc) | |
267 | { | |
268 | sim_close (sim_data->gdbsim_desc, 0); | |
269 | sim_data->gdbsim_desc = NULL; | |
270 | } | |
271 | xfree (sim_data); | |
272 | } | |
273 | } | |
9de2bdd7 | 274 | |
c906108c | 275 | static void |
146ec4db | 276 | dump_mem (const gdb_byte *buf, int len) |
c906108c | 277 | { |
1385f66c | 278 | fputs_unfiltered ("\t", gdb_stdlog); |
3d468296 AB |
279 | |
280 | if (len == 8 || len == 4) | |
c906108c | 281 | { |
3d468296 | 282 | uint32_t l[2]; |
123f5f96 | 283 | |
3d468296 | 284 | memcpy (l, buf, len); |
1385f66c | 285 | fprintf_unfiltered (gdb_stdlog, "0x%08x", l[0]); |
3d468296 | 286 | if (len == 8) |
1385f66c | 287 | fprintf_unfiltered (gdb_stdlog, " 0x%08x", l[1]); |
3d468296 AB |
288 | } |
289 | else | |
290 | { | |
291 | int i; | |
123f5f96 | 292 | |
3d468296 | 293 | for (i = 0; i < len; i++) |
1385f66c | 294 | fprintf_unfiltered (gdb_stdlog, "0x%02x ", buf[i]); |
c906108c | 295 | } |
3d468296 | 296 | |
1385f66c | 297 | fputs_unfiltered ("\n", gdb_stdlog); |
c906108c SS |
298 | } |
299 | ||
c906108c SS |
300 | /* Initialize gdb_callback. */ |
301 | ||
302 | static void | |
fba45db2 | 303 | init_callbacks (void) |
c906108c | 304 | { |
c5aa993b | 305 | if (!callbacks_initialized) |
c906108c SS |
306 | { |
307 | gdb_callback = default_callback; | |
308 | gdb_callback.init (&gdb_callback); | |
309 | gdb_callback.write_stdout = gdb_os_write_stdout; | |
310 | gdb_callback.flush_stdout = gdb_os_flush_stdout; | |
311 | gdb_callback.write_stderr = gdb_os_write_stderr; | |
312 | gdb_callback.flush_stderr = gdb_os_flush_stderr; | |
313 | gdb_callback.printf_filtered = gdb_os_printf_filtered; | |
314 | gdb_callback.vprintf_filtered = gdb_os_vprintf_filtered; | |
315 | gdb_callback.evprintf_filtered = gdb_os_evprintf_filtered; | |
316 | gdb_callback.error = gdb_os_error; | |
317 | gdb_callback.poll_quit = gdb_os_poll_quit; | |
318 | gdb_callback.magic = HOST_CALLBACK_MAGIC; | |
319 | callbacks_initialized = 1; | |
320 | } | |
321 | } | |
322 | ||
323 | /* Release callbacks (free resources used by them). */ | |
324 | ||
325 | static void | |
fba45db2 | 326 | end_callbacks (void) |
c906108c SS |
327 | { |
328 | if (callbacks_initialized) | |
329 | { | |
330 | gdb_callback.shutdown (&gdb_callback); | |
331 | callbacks_initialized = 0; | |
332 | } | |
333 | } | |
334 | ||
335 | /* GDB version of os_write_stdout callback. */ | |
336 | ||
c5aa993b | 337 | static int |
fba45db2 | 338 | gdb_os_write_stdout (host_callback *p, const char *buf, int len) |
c906108c SS |
339 | { |
340 | int i; | |
341 | char b[2]; | |
342 | ||
d9fcf2fb | 343 | ui_file_write (gdb_stdtarg, buf, len); |
c906108c SS |
344 | return len; |
345 | } | |
346 | ||
347 | /* GDB version of os_flush_stdout callback. */ | |
348 | ||
349 | static void | |
fba45db2 | 350 | gdb_os_flush_stdout (host_callback *p) |
c906108c | 351 | { |
4ce44c66 | 352 | gdb_flush (gdb_stdtarg); |
c906108c SS |
353 | } |
354 | ||
355 | /* GDB version of os_write_stderr callback. */ | |
356 | ||
c5aa993b | 357 | static int |
fba45db2 | 358 | gdb_os_write_stderr (host_callback *p, const char *buf, int len) |
c906108c SS |
359 | { |
360 | int i; | |
361 | char b[2]; | |
362 | ||
c5aa993b | 363 | for (i = 0; i < len; i++) |
c906108c SS |
364 | { |
365 | b[0] = buf[i]; | |
366 | b[1] = 0; | |
22e8e3c7 | 367 | fputs_unfiltered (b, gdb_stdtargerr); |
c906108c SS |
368 | } |
369 | return len; | |
370 | } | |
371 | ||
372 | /* GDB version of os_flush_stderr callback. */ | |
373 | ||
374 | static void | |
fba45db2 | 375 | gdb_os_flush_stderr (host_callback *p) |
c906108c | 376 | { |
22e8e3c7 | 377 | gdb_flush (gdb_stdtargerr); |
c906108c SS |
378 | } |
379 | ||
380 | /* GDB version of printf_filtered callback. */ | |
381 | ||
c906108c | 382 | static void |
c5aa993b | 383 | gdb_os_printf_filtered (host_callback * p, const char *format,...) |
c906108c SS |
384 | { |
385 | va_list args; | |
c906108c | 386 | |
123f5f96 | 387 | va_start (args, format); |
c906108c | 388 | vfprintf_filtered (gdb_stdout, format, args); |
c906108c SS |
389 | va_end (args); |
390 | } | |
391 | ||
392 | /* GDB version of error vprintf_filtered. */ | |
393 | ||
c906108c | 394 | static void |
c5aa993b | 395 | gdb_os_vprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c SS |
396 | { |
397 | vfprintf_filtered (gdb_stdout, format, ap); | |
398 | } | |
399 | ||
400 | /* GDB version of error evprintf_filtered. */ | |
401 | ||
c906108c | 402 | static void |
c5aa993b | 403 | gdb_os_evprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c SS |
404 | { |
405 | vfprintf_filtered (gdb_stderr, format, ap); | |
406 | } | |
407 | ||
408 | /* GDB version of error callback. */ | |
409 | ||
c906108c | 410 | static void |
58d4abe1 | 411 | gdb_os_error (host_callback * p, const char *format, ...) |
c906108c | 412 | { |
58d4abe1 | 413 | va_list args; |
123f5f96 | 414 | |
58d4abe1 PA |
415 | va_start (args, format); |
416 | verror (format, args); | |
417 | va_end (args); | |
c906108c SS |
418 | } |
419 | ||
8238d0bf | 420 | int |
e7faf938 | 421 | one2one_register_sim_regno (struct gdbarch *gdbarch, int regnum) |
8238d0bf AC |
422 | { |
423 | /* Only makes sense to supply raw registers. */ | |
e7faf938 | 424 | gdb_assert (regnum >= 0 && regnum < gdbarch_num_regs (gdbarch)); |
8238d0bf AC |
425 | return regnum; |
426 | } | |
427 | ||
c906108c | 428 | static void |
28439f5e PA |
429 | gdbsim_fetch_register (struct target_ops *ops, |
430 | struct regcache *regcache, int regno) | |
c906108c | 431 | { |
40a6adc1 | 432 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
bcc0c096 | 433 | struct inferior *inf = find_inferior_ptid (regcache_get_ptid (regcache)); |
db04efe6 | 434 | struct sim_inferior_data *sim_data |
bcc0c096 | 435 | = get_sim_inferior_data (inf, SIM_INSTANCE_NEEDED); |
123f5f96 | 436 | |
c5aa993b | 437 | if (regno == -1) |
c906108c | 438 | { |
40a6adc1 | 439 | for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++) |
28439f5e | 440 | gdbsim_fetch_register (ops, regcache, regno); |
8238d0bf | 441 | return; |
c906108c | 442 | } |
8238d0bf | 443 | |
40a6adc1 | 444 | switch (gdbarch_register_sim_regno (gdbarch, regno)) |
c906108c | 445 | { |
8238d0bf AC |
446 | case LEGACY_SIM_REGNO_IGNORE: |
447 | break; | |
448 | case SIM_REGNO_DOES_NOT_EXIST: | |
449 | { | |
450 | /* For moment treat a `does not exist' register the same way | |
74228e77 | 451 | as an ``unavailable'' register. */ |
a4d1e79a | 452 | regcache->raw_supply_zeroed (regno); |
8238d0bf AC |
453 | break; |
454 | } | |
74228e77 | 455 | |
8238d0bf AC |
456 | default: |
457 | { | |
458 | static int warn_user = 1; | |
a4d1e79a AH |
459 | int regsize = register_size (gdbarch, regno); |
460 | gdb::byte_vector buf (regsize, 0); | |
8238d0bf | 461 | int nr_bytes; |
123f5f96 | 462 | |
40a6adc1 | 463 | gdb_assert (regno >= 0 && regno < gdbarch_num_regs (gdbarch)); |
db04efe6 | 464 | nr_bytes = sim_fetch_register (sim_data->gdbsim_desc, |
474c1661 | 465 | gdbarch_register_sim_regno |
40a6adc1 | 466 | (gdbarch, regno), |
a4d1e79a AH |
467 | buf.data (), regsize); |
468 | if (nr_bytes > 0 && nr_bytes != regsize && warn_user) | |
8238d0bf AC |
469 | { |
470 | fprintf_unfiltered (gdb_stderr, | |
0df8b418 MS |
471 | "Size of register %s (%d/%d) " |
472 | "incorrect (%d instead of %d))", | |
40a6adc1 | 473 | gdbarch_register_name (gdbarch, regno), |
474c1661 | 474 | regno, |
a4d1e79a AH |
475 | gdbarch_register_sim_regno (gdbarch, regno), |
476 | nr_bytes, regsize); | |
8238d0bf AC |
477 | warn_user = 0; |
478 | } | |
479 | /* FIXME: cagney/2002-05-27: Should check `nr_bytes == 0' | |
278a7cf7 | 480 | indicating that GDB and the SIM have different ideas about |
8238d0bf AC |
481 | which registers are fetchable. */ |
482 | /* Else if (nr_bytes < 0): an old simulator, that doesn't | |
483 | think to return the register size. Just assume all is ok. */ | |
a4d1e79a | 484 | regcache->raw_supply (regno, buf.data ()); |
ea35711c | 485 | if (remote_debug) |
8238d0bf | 486 | { |
1385f66c PA |
487 | fprintf_unfiltered (gdb_stdlog, |
488 | "gdbsim_fetch_register: %d", regno); | |
8238d0bf | 489 | /* FIXME: We could print something more intelligible. */ |
a4d1e79a | 490 | dump_mem (buf.data (), regsize); |
8238d0bf AC |
491 | } |
492 | break; | |
493 | } | |
c906108c SS |
494 | } |
495 | } | |
496 | ||
497 | ||
498 | static void | |
28439f5e PA |
499 | gdbsim_store_register (struct target_ops *ops, |
500 | struct regcache *regcache, int regno) | |
c906108c | 501 | { |
40a6adc1 | 502 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
bcc0c096 | 503 | struct inferior *inf = find_inferior_ptid (regcache_get_ptid (regcache)); |
db04efe6 | 504 | struct sim_inferior_data *sim_data |
bcc0c096 | 505 | = get_sim_inferior_data (inf, SIM_INSTANCE_NEEDED); |
db04efe6 | 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 | { |
a4d1e79a AH |
515 | int regsize = register_size (gdbarch, regno); |
516 | gdb::byte_vector tmp (regsize); | |
c906108c | 517 | int nr_bytes; |
123f5f96 | 518 | |
a4d1e79a | 519 | regcache->cooked_read (regno, tmp.data ()); |
db04efe6 | 520 | nr_bytes = sim_store_register (sim_data->gdbsim_desc, |
474c1661 | 521 | gdbarch_register_sim_regno |
40a6adc1 | 522 | (gdbarch, regno), |
a4d1e79a AH |
523 | tmp.data (), regsize); |
524 | ||
525 | if (nr_bytes > 0 && nr_bytes != regsize) | |
8e65ff28 | 526 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 527 | _("Register size different to expected")); |
dae477fe | 528 | if (nr_bytes < 0) |
74228e77 RM |
529 | internal_error (__FILE__, __LINE__, |
530 | _("Register %d not updated"), regno); | |
dae477fe | 531 | if (nr_bytes == 0) |
74228e77 RM |
532 | warning (_("Register %s not updated"), |
533 | gdbarch_register_name (gdbarch, regno)); | |
dae477fe | 534 | |
ea35711c | 535 | if (remote_debug) |
c906108c | 536 | { |
1385f66c | 537 | fprintf_unfiltered (gdb_stdlog, "gdbsim_store_register: %d", regno); |
c906108c | 538 | /* FIXME: We could print something more intelligible. */ |
a4d1e79a | 539 | dump_mem (tmp.data (), regsize); |
c906108c SS |
540 | } |
541 | } | |
542 | } | |
543 | ||
544 | /* Kill the running program. This may involve closing any open files | |
545 | and releasing other resources acquired by the simulated program. */ | |
546 | ||
547 | static void | |
7d85a9c0 | 548 | gdbsim_kill (struct target_ops *ops) |
c906108c | 549 | { |
ea35711c | 550 | if (remote_debug) |
1385f66c | 551 | fprintf_unfiltered (gdb_stdlog, "gdbsim_kill\n"); |
c906108c SS |
552 | |
553 | /* There is no need to `kill' running simulator - the simulator is | |
52bb452f | 554 | not running. Mourning it is enough. */ |
bc1e6c81 | 555 | target_mourn_inferior (inferior_ptid); |
c906108c SS |
556 | } |
557 | ||
558 | /* Load an executable file into the target process. This is expected to | |
559 | not only bring new code into the target process, but also to update | |
560 | GDB's symbol tables to match. */ | |
561 | ||
562 | static void | |
9cbe5fff | 563 | gdbsim_load (struct target_ops *self, const char *args, int fromtty) |
c906108c | 564 | { |
b2b255bd | 565 | const char *prog; |
db04efe6 KB |
566 | struct sim_inferior_data *sim_data |
567 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NEEDED); | |
1986bccd | 568 | |
d1a41061 PP |
569 | if (args == NULL) |
570 | error_no_arg (_("program to load")); | |
1986bccd | 571 | |
773a1edc | 572 | gdb_argv argv (args); |
1986bccd AS |
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) |
1385f66c | 580 | fprintf_unfiltered (gdb_stdlog, "gdbsim_load: prog \"%s\"\n", prog); |
c906108c | 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 | |
7c5ded6a SDJ |
604 | gdbsim_create_inferior (struct target_ops *target, const char *exec_file, |
605 | const std::string &allargs, 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; |
773a1edc | 610 | char *arg_buf; |
7c5ded6a | 611 | const char *args = allargs.c_str (); |
c906108c SS |
612 | |
613 | if (exec_file == 0 || exec_bfd == 0) | |
8a3fe4f8 | 614 | warning (_("No executable file specified.")); |
db04efe6 | 615 | if (!sim_data->program_loaded) |
8a3fe4f8 | 616 | warning (_("No program loaded.")); |
c906108c | 617 | |
ea35711c | 618 | if (remote_debug) |
1385f66c PA |
619 | fprintf_unfiltered (gdb_stdlog, |
620 | "gdbsim_create_inferior: exec_file \"%s\", args \"%s\"\n", | |
621 | (exec_file ? exec_file : "(NULL)"), | |
622 | args); | |
c906108c | 623 | |
db04efe6 | 624 | if (ptid_equal (inferior_ptid, sim_data->remote_sim_ptid)) |
7d85a9c0 | 625 | gdbsim_kill (target); |
c906108c SS |
626 | remove_breakpoints (); |
627 | init_wait_for_inferior (); | |
628 | ||
773a1edc | 629 | gdb_argv built_argv; |
c906108c SS |
630 | if (exec_file != NULL) |
631 | { | |
7c5ded6a | 632 | len = strlen (exec_file) + 1 + allargs.size () + 1 + /*slop */ 10; |
c906108c SS |
633 | arg_buf = (char *) alloca (len); |
634 | arg_buf[0] = '\0'; | |
635 | strcat (arg_buf, exec_file); | |
636 | strcat (arg_buf, " "); | |
637 | strcat (arg_buf, args); | |
773a1edc | 638 | built_argv.reset (arg_buf); |
c906108c | 639 | } |
ddd60447 | 640 | |
2a7c8fd5 AB |
641 | if (!have_inferiors ()) |
642 | init_thread_list (); | |
643 | ||
773a1edc TT |
644 | if (sim_create_inferior (sim_data->gdbsim_desc, exec_bfd, |
645 | built_argv.get (), env) | |
ddd60447 MF |
646 | != SIM_RC_OK) |
647 | error (_("Unable to create sim inferior.")); | |
c906108c | 648 | |
db04efe6 | 649 | inferior_ptid = sim_data->remote_sim_ptid; |
20176d8f | 650 | inferior_appeared (current_inferior (), ptid_get_pid (inferior_ptid)); |
9de2bdd7 PA |
651 | add_thread_silent (inferior_ptid); |
652 | ||
0df8b418 MS |
653 | insert_breakpoints (); /* Needed to get correct instruction |
654 | in cache. */ | |
c906108c | 655 | |
88056fbb | 656 | clear_proceed_status (0); |
c906108c SS |
657 | } |
658 | ||
659 | /* The open routine takes the rest of the parameters from the command, | |
660 | and (if successful) pushes a new target onto the stack. | |
661 | Targets should supply this routine, if only to provide an error message. */ | |
0df8b418 | 662 | /* Called when selecting the simulator. E.g. (gdb) target sim name. */ |
c906108c SS |
663 | |
664 | static void | |
014f9477 | 665 | gdbsim_open (const char *args, int from_tty) |
c906108c SS |
666 | { |
667 | int len; | |
668 | char *arg_buf; | |
db04efe6 | 669 | struct sim_inferior_data *sim_data; |
87d1b309 | 670 | const char *sysroot; |
db04efe6 | 671 | SIM_DESC gdbsim_desc; |
c906108c | 672 | |
87d1b309 MF |
673 | sysroot = gdb_sysroot; |
674 | if (is_target_filename (sysroot)) | |
675 | sysroot += strlen (TARGET_SYSROOT_PREFIX); | |
676 | ||
ea35711c | 677 | if (remote_debug) |
1385f66c PA |
678 | fprintf_unfiltered (gdb_stdlog, |
679 | "gdbsim_open: args \"%s\"\n", args ? args : "(null)"); | |
c906108c | 680 | |
db04efe6 KB |
681 | /* Ensure that the sim target is not on the target stack. This is |
682 | necessary, because if it is on the target stack, the call to | |
683 | push_target below will invoke sim_close(), thus freeing various | |
684 | state (including a sim instance) that we allocate prior to | |
685 | invoking push_target(). We want to delay the push_target() | |
686 | operation until after we complete those operations which could | |
687 | error out. */ | |
688 | if (gdbsim_is_open) | |
c906108c SS |
689 | unpush_target (&gdbsim_ops); |
690 | ||
c5aa993b | 691 | len = (7 + 1 /* gdbsim */ |
c906108c SS |
692 | + strlen (" -E little") |
693 | + strlen (" --architecture=xxxxxxxxxx") | |
23bf70af | 694 | + strlen (" --sysroot=") + strlen (sysroot) + |
c906108c | 695 | + (args ? strlen (args) : 0) |
c5aa993b | 696 | + 50) /* slack */ ; |
c906108c | 697 | arg_buf = (char *) alloca (len); |
c5aa993b | 698 | strcpy (arg_buf, "gdbsim"); /* 7 */ |
b6d373df | 699 | /* Specify the byte order for the target when it is explicitly |
0df8b418 | 700 | specified by the user (not auto detected). */ |
b6d373df | 701 | switch (selected_byte_order ()) |
c906108c | 702 | { |
a8cf2722 AC |
703 | case BFD_ENDIAN_BIG: |
704 | strcat (arg_buf, " -E big"); | |
705 | break; | |
706 | case BFD_ENDIAN_LITTLE: | |
707 | strcat (arg_buf, " -E little"); | |
708 | break; | |
709 | case BFD_ENDIAN_UNKNOWN: | |
710 | break; | |
c906108c SS |
711 | } |
712 | /* Specify the architecture of the target when it has been | |
713 | explicitly specified */ | |
a8cf2722 | 714 | if (selected_architecture_name () != NULL) |
c906108c SS |
715 | { |
716 | strcat (arg_buf, " --architecture="); | |
a8cf2722 | 717 | strcat (arg_buf, selected_architecture_name ()); |
c906108c | 718 | } |
f4b8c29b MF |
719 | /* Pass along gdb's concept of the sysroot. */ |
720 | strcat (arg_buf, " --sysroot="); | |
23bf70af | 721 | strcat (arg_buf, sysroot); |
c906108c SS |
722 | /* finally, any explicit args */ |
723 | if (args) | |
724 | { | |
c5aa993b | 725 | strcat (arg_buf, " "); /* 1 */ |
c906108c SS |
726 | strcat (arg_buf, args); |
727 | } | |
773a1edc | 728 | |
74cbb09e SM |
729 | gdb_argv argv (arg_buf); |
730 | sim_argv = argv.get (); | |
c906108c SS |
731 | |
732 | init_callbacks (); | |
db04efe6 | 733 | gdbsim_desc = sim_open (SIM_OPEN_DEBUG, &gdb_callback, exec_bfd, sim_argv); |
c906108c SS |
734 | |
735 | if (gdbsim_desc == 0) | |
db04efe6 | 736 | { |
db04efe6 KB |
737 | sim_argv = NULL; |
738 | error (_("unable to create simulator instance")); | |
739 | } | |
740 | ||
74cbb09e | 741 | argv.release (); |
773a1edc | 742 | |
db04efe6 KB |
743 | /* Reset the pid numberings for this batch of sim instances. */ |
744 | next_pid = INITIAL_PID; | |
745 | ||
746 | /* Allocate the inferior data, but do not allocate a sim instance | |
747 | since we've already just done that. */ | |
0df8b418 MS |
748 | sim_data = get_sim_inferior_data (current_inferior (), |
749 | SIM_INSTANCE_NOT_NEEDED); | |
db04efe6 KB |
750 | |
751 | sim_data->gdbsim_desc = gdbsim_desc; | |
c906108c SS |
752 | |
753 | push_target (&gdbsim_ops); | |
c906108c | 754 | printf_filtered ("Connected to the simulator.\n"); |
52bb452f DJ |
755 | |
756 | /* There's nothing running after "target sim" or "load"; not until | |
757 | "run". */ | |
758 | inferior_ptid = null_ptid; | |
db04efe6 KB |
759 | |
760 | gdbsim_is_open = 1; | |
761 | } | |
762 | ||
763 | /* Callback for iterate_over_inferiors. Called (indirectly) by | |
764 | gdbsim_close(). */ | |
765 | ||
766 | static int | |
767 | gdbsim_close_inferior (struct inferior *inf, void *arg) | |
768 | { | |
653090d3 SM |
769 | struct sim_inferior_data *sim_data |
770 | = (struct sim_inferior_data *) inferior_data (inf, sim_inferior_data_key); | |
db04efe6 KB |
771 | if (sim_data != NULL) |
772 | { | |
773 | ptid_t ptid = sim_data->remote_sim_ptid; | |
774 | ||
775 | sim_inferior_data_cleanup (inf, sim_data); | |
776 | set_inferior_data (inf, sim_inferior_data_key, NULL); | |
777 | ||
778 | /* Having a ptid allocated and stored in remote_sim_ptid does | |
0df8b418 | 779 | not mean that a corresponding inferior was ever created. |
db04efe6 KB |
780 | Thus we need to verify the existence of an inferior using the |
781 | pid in question before setting inferior_ptid via | |
782 | switch_to_thread() or mourning the inferior. */ | |
c9657e70 | 783 | if (find_inferior_ptid (ptid) != NULL) |
db04efe6 KB |
784 | { |
785 | switch_to_thread (ptid); | |
786 | generic_mourn_inferior (); | |
787 | } | |
788 | } | |
789 | ||
790 | return 0; | |
c906108c SS |
791 | } |
792 | ||
0df8b418 | 793 | /* Close out all files and local state before this target loses control. */ |
c906108c SS |
794 | |
795 | static void | |
de90e03d | 796 | gdbsim_close (struct target_ops *self) |
c906108c | 797 | { |
db04efe6 KB |
798 | struct sim_inferior_data *sim_data |
799 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
800 | ||
ea35711c | 801 | if (remote_debug) |
1385f66c | 802 | fprintf_unfiltered (gdb_stdlog, "gdbsim_close\n"); |
c906108c | 803 | |
db04efe6 | 804 | iterate_over_inferiors (gdbsim_close_inferior, NULL); |
c906108c | 805 | |
db04efe6 | 806 | if (sim_argv != NULL) |
c906108c | 807 | { |
db04efe6 KB |
808 | freeargv (sim_argv); |
809 | sim_argv = NULL; | |
c906108c SS |
810 | } |
811 | ||
812 | end_callbacks (); | |
db04efe6 KB |
813 | |
814 | gdbsim_is_open = 0; | |
c906108c SS |
815 | } |
816 | ||
817 | /* Takes a program previously attached to and detaches it. | |
818 | The program may resume execution (some targets do, some don't) and will | |
819 | no longer stop on signals, etc. We better not have left any breakpoints | |
820 | in the program or it'll die when it hits one. ARGS is arguments | |
821 | typed by the user (e.g. a signal to send the process). FROM_TTY | |
822 | says whether to be verbose or not. */ | |
823 | /* Terminate the open connection to the remote debugger. | |
824 | Use this when you want to detach and do something else with your gdb. */ | |
825 | ||
826 | static void | |
52554a0e | 827 | gdbsim_detach (struct target_ops *ops, const char *args, int from_tty) |
c906108c | 828 | { |
ea35711c | 829 | if (remote_debug) |
1385f66c | 830 | fprintf_unfiltered (gdb_stdlog, "gdbsim_detach: args \"%s\"\n", args); |
c906108c | 831 | |
7fdc1521 | 832 | unpush_target (ops); /* calls gdbsim_close to do the real work */ |
c906108c SS |
833 | if (from_tty) |
834 | printf_filtered ("Ending simulator %s debugging\n", target_shortname); | |
835 | } | |
c5aa993b | 836 | |
c906108c SS |
837 | /* Resume execution of the target process. STEP says whether to single-step |
838 | or to run free; SIGGNAL is the signal value (e.g. SIGINT) to be given | |
839 | to the target, or zero for no signal. */ | |
840 | ||
db04efe6 KB |
841 | struct resume_data |
842 | { | |
2ea28649 | 843 | enum gdb_signal siggnal; |
db04efe6 KB |
844 | int step; |
845 | }; | |
846 | ||
847 | static int | |
848 | gdbsim_resume_inferior (struct inferior *inf, void *arg) | |
849 | { | |
850 | struct sim_inferior_data *sim_data | |
851 | = get_sim_inferior_data (inf, SIM_INSTANCE_NOT_NEEDED); | |
653090d3 | 852 | struct resume_data *rd = (struct resume_data *) arg; |
db04efe6 KB |
853 | |
854 | if (sim_data) | |
855 | { | |
856 | sim_data->resume_siggnal = rd->siggnal; | |
857 | sim_data->resume_step = rd->step; | |
858 | ||
859 | if (remote_debug) | |
1385f66c PA |
860 | fprintf_unfiltered (gdb_stdlog, |
861 | _("gdbsim_resume: pid %d, step %d, signal %d\n"), | |
862 | inf->pid, rd->step, rd->siggnal); | |
db04efe6 KB |
863 | } |
864 | ||
865 | /* When called from iterate_over_inferiors, a zero return causes the | |
866 | iteration process to proceed until there are no more inferiors to | |
867 | consider. */ | |
868 | return 0; | |
869 | } | |
c906108c SS |
870 | |
871 | static void | |
2fb89e62 | 872 | gdbsim_resume (struct target_ops *ops, |
2ea28649 | 873 | ptid_t ptid, int step, enum gdb_signal siggnal) |
c906108c | 874 | { |
db04efe6 KB |
875 | struct resume_data rd; |
876 | struct sim_inferior_data *sim_data | |
877 | = get_sim_inferior_data_by_ptid (ptid, SIM_INSTANCE_NOT_NEEDED); | |
878 | ||
879 | rd.siggnal = siggnal; | |
880 | rd.step = step; | |
881 | ||
0df8b418 | 882 | /* We don't access any sim_data members within this function. |
db04efe6 KB |
883 | What's of interest is whether or not the call to |
884 | get_sim_inferior_data_by_ptid(), above, is able to obtain a | |
885 | non-NULL pointer. If it managed to obtain a non-NULL pointer, we | |
886 | know we have a single inferior to consider. If it's NULL, we | |
887 | either have multiple inferiors to resume or an error condition. */ | |
888 | ||
889 | if (sim_data) | |
c9657e70 | 890 | gdbsim_resume_inferior (find_inferior_ptid (ptid), &rd); |
db04efe6 KB |
891 | else if (ptid_equal (ptid, minus_one_ptid)) |
892 | iterate_over_inferiors (gdbsim_resume_inferior, &rd); | |
893 | else | |
8a3fe4f8 | 894 | error (_("The program is not being run.")); |
c906108c SS |
895 | } |
896 | ||
bfedc46a | 897 | /* Notify the simulator of an asynchronous request to interrupt. |
c5aa993b | 898 | |
bfedc46a | 899 | The simulator shall ensure that the interrupt request is eventually |
c906108c | 900 | delivered to the simulator. If the call is made while the |
bfedc46a | 901 | simulator is not running then the interrupt request is processed when |
c906108c SS |
902 | the simulator is next resumed. |
903 | ||
db04efe6 KB |
904 | For simulators that do not support this operation, just abort. */ |
905 | ||
906 | static int | |
bfedc46a | 907 | gdbsim_interrupt_inferior (struct inferior *inf, void *arg) |
db04efe6 KB |
908 | { |
909 | struct sim_inferior_data *sim_data | |
910 | = get_sim_inferior_data (inf, SIM_INSTANCE_NEEDED); | |
911 | ||
912 | if (sim_data) | |
913 | { | |
914 | if (!sim_stop (sim_data->gdbsim_desc)) | |
915 | { | |
916 | quit (); | |
917 | } | |
918 | } | |
919 | ||
920 | /* When called from iterate_over_inferiors, a zero return causes the | |
921 | iteration process to proceed until there are no more inferiors to | |
922 | consider. */ | |
923 | return 0; | |
924 | } | |
c906108c SS |
925 | |
926 | static void | |
bfedc46a | 927 | gdbsim_interrupt (struct target_ops *self, ptid_t ptid) |
c906108c | 928 | { |
db04efe6 KB |
929 | struct sim_inferior_data *sim_data; |
930 | ||
931 | if (ptid_equal (ptid, minus_one_ptid)) | |
c906108c | 932 | { |
bfedc46a | 933 | iterate_over_inferiors (gdbsim_interrupt_inferior, NULL); |
db04efe6 KB |
934 | } |
935 | else | |
936 | { | |
c9657e70 | 937 | struct inferior *inf = find_inferior_ptid (ptid); |
db04efe6 KB |
938 | |
939 | if (inf == NULL) | |
0df8b418 MS |
940 | error (_("Can't stop pid %d. No inferior found."), |
941 | ptid_get_pid (ptid)); | |
db04efe6 | 942 | |
bfedc46a | 943 | gdbsim_interrupt_inferior (inf, NULL); |
c906108c SS |
944 | } |
945 | } | |
946 | ||
947 | /* GDB version of os_poll_quit callback. | |
8a0ce09a | 948 | Taken from gdb/util.c - should be in a library. */ |
c906108c SS |
949 | |
950 | static int | |
fba45db2 | 951 | gdb_os_poll_quit (host_callback *p) |
c906108c | 952 | { |
98bbd631 AC |
953 | if (deprecated_ui_loop_hook != NULL) |
954 | deprecated_ui_loop_hook (0); | |
7a292a7a | 955 | |
522002f9 | 956 | if (check_quit_flag ()) /* gdb's idea of quit */ |
abf009ef | 957 | return 1; |
c906108c SS |
958 | return 0; |
959 | } | |
960 | ||
961 | /* Wait for inferior process to do something. Return pid of child, | |
962 | or -1 in case of error; store status through argument pointer STATUS, | |
0df8b418 | 963 | just as `wait' would. */ |
c906108c SS |
964 | |
965 | static void | |
fba45db2 | 966 | gdbsim_cntrl_c (int signo) |
c906108c | 967 | { |
bfedc46a | 968 | gdbsim_interrupt (NULL, minus_one_ptid); |
c906108c SS |
969 | } |
970 | ||
39f77062 | 971 | static ptid_t |
117de6a9 | 972 | gdbsim_wait (struct target_ops *ops, |
47608cb1 | 973 | ptid_t ptid, struct target_waitstatus *status, int options) |
c906108c | 974 | { |
db04efe6 | 975 | struct sim_inferior_data *sim_data; |
a40805d4 | 976 | static sighandler_t prev_sigint; |
c906108c SS |
977 | int sigrc = 0; |
978 | enum sim_stop reason = sim_running; | |
979 | ||
db04efe6 KB |
980 | /* This target isn't able to (yet) resume more than one inferior at a time. |
981 | When ptid is minus_one_ptid, just use the current inferior. If we're | |
982 | given an explicit pid, we'll try to find it and use that instead. */ | |
983 | if (ptid_equal (ptid, minus_one_ptid)) | |
0df8b418 MS |
984 | sim_data = get_sim_inferior_data (current_inferior (), |
985 | SIM_INSTANCE_NEEDED); | |
db04efe6 KB |
986 | else |
987 | { | |
988 | sim_data = get_sim_inferior_data_by_ptid (ptid, SIM_INSTANCE_NEEDED); | |
989 | if (sim_data == NULL) | |
990 | error (_("Unable to wait for pid %d. Inferior not found."), | |
991 | ptid_get_pid (ptid)); | |
992 | inferior_ptid = ptid; | |
993 | } | |
994 | ||
ea35711c | 995 | if (remote_debug) |
1385f66c | 996 | fprintf_unfiltered (gdb_stdlog, "gdbsim_wait\n"); |
c906108c SS |
997 | |
998 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) | |
999 | { | |
1000 | struct sigaction sa, osa; | |
1001 | sa.sa_handler = gdbsim_cntrl_c; | |
1002 | sigemptyset (&sa.sa_mask); | |
1003 | sa.sa_flags = 0; | |
1004 | sigaction (SIGINT, &sa, &osa); | |
1005 | prev_sigint = osa.sa_handler; | |
1006 | } | |
1007 | #else | |
1008 | prev_sigint = signal (SIGINT, gdbsim_cntrl_c); | |
1009 | #endif | |
db04efe6 | 1010 | sim_resume (sim_data->gdbsim_desc, sim_data->resume_step, |
74228e77 | 1011 | sim_data->resume_siggnal); |
db04efe6 | 1012 | |
c906108c | 1013 | signal (SIGINT, prev_sigint); |
db04efe6 | 1014 | sim_data->resume_step = 0; |
c906108c | 1015 | |
db04efe6 | 1016 | sim_stop_reason (sim_data->gdbsim_desc, &reason, &sigrc); |
c906108c SS |
1017 | |
1018 | switch (reason) | |
1019 | { | |
1020 | case sim_exited: | |
1021 | status->kind = TARGET_WAITKIND_EXITED; | |
1022 | status->value.integer = sigrc; | |
1023 | break; | |
1024 | case sim_stopped: | |
1025 | switch (sigrc) | |
1026 | { | |
a493e3e2 | 1027 | case GDB_SIGNAL_ABRT: |
c906108c SS |
1028 | quit (); |
1029 | break; | |
a493e3e2 PA |
1030 | case GDB_SIGNAL_INT: |
1031 | case GDB_SIGNAL_TRAP: | |
c906108c SS |
1032 | default: |
1033 | status->kind = TARGET_WAITKIND_STOPPED; | |
653090d3 | 1034 | status->value.sig = (enum gdb_signal) sigrc; |
c906108c SS |
1035 | break; |
1036 | } | |
1037 | break; | |
1038 | case sim_signalled: | |
1039 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
653090d3 | 1040 | status->value.sig = (enum gdb_signal) sigrc; |
c906108c SS |
1041 | break; |
1042 | case sim_running: | |
1043 | case sim_polling: | |
0df8b418 | 1044 | /* FIXME: Is this correct? */ |
c906108c SS |
1045 | break; |
1046 | } | |
1047 | ||
39f77062 | 1048 | return inferior_ptid; |
c906108c SS |
1049 | } |
1050 | ||
1051 | /* Get ready to modify the registers array. On machines which store | |
1052 | individual registers, this doesn't need to do anything. On machines | |
1053 | which store all the registers in one fell swoop, this makes sure | |
1054 | that registers contains all the registers from the program being | |
1055 | debugged. */ | |
1056 | ||
1057 | static void | |
f32dbf8c | 1058 | gdbsim_prepare_to_store (struct target_ops *self, struct regcache *regcache) |
c906108c | 1059 | { |
0df8b418 | 1060 | /* Do nothing, since we can store individual regs. */ |
c906108c SS |
1061 | } |
1062 | ||
146ec4db PA |
1063 | /* Helper for gdbsim_xfer_partial that handles memory transfers. |
1064 | Arguments are like target_xfer_partial. */ | |
d93bce06 | 1065 | |
9b409511 | 1066 | static enum target_xfer_status |
146ec4db PA |
1067 | gdbsim_xfer_memory (struct target_ops *target, |
1068 | gdb_byte *readbuf, const gdb_byte *writebuf, | |
9b409511 | 1069 | ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) |
c906108c | 1070 | { |
db04efe6 KB |
1071 | struct sim_inferior_data *sim_data |
1072 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
b55e14c7 | 1073 | int l; |
db04efe6 | 1074 | |
0c012db1 KB |
1075 | /* If this target doesn't have memory yet, return 0 causing the |
1076 | request to be passed to a lower target, hopefully an exec | |
1077 | file. */ | |
1078 | if (!target->to_has_memory (target)) | |
9b409511 | 1079 | return TARGET_XFER_EOF; |
52bb452f | 1080 | |
db04efe6 | 1081 | if (!sim_data->program_loaded) |
8a3fe4f8 | 1082 | error (_("No program loaded.")); |
c906108c | 1083 | |
db04efe6 KB |
1084 | /* Note that we obtained the sim_data pointer above using |
1085 | SIM_INSTANCE_NOT_NEEDED. We do this so that we don't needlessly | |
1086 | allocate a sim instance prior to loading a program. If we | |
1087 | get to this point in the code though, gdbsim_desc should be | |
1088 | non-NULL. (Note that a sim instance is needed in order to load | |
1089 | the program...) */ | |
1090 | gdb_assert (sim_data->gdbsim_desc != NULL); | |
1091 | ||
ea35711c | 1092 | if (remote_debug) |
fcde0081 | 1093 | fprintf_unfiltered (gdb_stdlog, |
146ec4db PA |
1094 | "gdbsim_xfer_memory: readbuf %s, writebuf %s, " |
1095 | "memaddr %s, len %s\n", | |
1096 | host_address_to_string (readbuf), | |
1097 | host_address_to_string (writebuf), | |
fcde0081 | 1098 | paddress (target_gdbarch (), memaddr), |
b55e14c7 | 1099 | pulongest (len)); |
c906108c | 1100 | |
146ec4db | 1101 | if (writebuf) |
c906108c | 1102 | { |
fcde0081 | 1103 | if (remote_debug && len > 0) |
146ec4db | 1104 | dump_mem (writebuf, len); |
b55e14c7 | 1105 | l = sim_write (sim_data->gdbsim_desc, memaddr, writebuf, len); |
c906108c | 1106 | } |
c5aa993b | 1107 | else |
c906108c | 1108 | { |
b55e14c7 | 1109 | l = sim_read (sim_data->gdbsim_desc, memaddr, readbuf, len); |
ea35711c | 1110 | if (remote_debug && len > 0) |
146ec4db | 1111 | dump_mem (readbuf, len); |
c5aa993b | 1112 | } |
9b409511 YQ |
1113 | if (l > 0) |
1114 | { | |
1115 | *xfered_len = (ULONGEST) l; | |
1116 | return TARGET_XFER_OK; | |
1117 | } | |
1118 | else if (l == 0) | |
1119 | return TARGET_XFER_EOF; | |
1120 | else | |
1121 | return TARGET_XFER_E_IO; | |
c906108c SS |
1122 | } |
1123 | ||
146ec4db PA |
1124 | /* Target to_xfer_partial implementation. */ |
1125 | ||
9b409511 | 1126 | static enum target_xfer_status |
146ec4db PA |
1127 | gdbsim_xfer_partial (struct target_ops *ops, enum target_object object, |
1128 | const char *annex, gdb_byte *readbuf, | |
9b409511 YQ |
1129 | const gdb_byte *writebuf, ULONGEST offset, ULONGEST len, |
1130 | ULONGEST *xfered_len) | |
146ec4db PA |
1131 | { |
1132 | switch (object) | |
1133 | { | |
1134 | case TARGET_OBJECT_MEMORY: | |
9b409511 YQ |
1135 | return gdbsim_xfer_memory (ops, readbuf, writebuf, offset, len, |
1136 | xfered_len); | |
146ec4db PA |
1137 | |
1138 | default: | |
2ed4b548 | 1139 | return TARGET_XFER_E_IO; |
146ec4db PA |
1140 | } |
1141 | } | |
1142 | ||
c906108c | 1143 | static void |
fba45db2 | 1144 | gdbsim_files_info (struct target_ops *target) |
c906108c | 1145 | { |
db04efe6 KB |
1146 | struct sim_inferior_data *sim_data |
1147 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NEEDED); | |
0d18d720 | 1148 | const char *file = "nothing"; |
c906108c SS |
1149 | |
1150 | if (exec_bfd) | |
1151 | file = bfd_get_filename (exec_bfd); | |
1152 | ||
ea35711c | 1153 | if (remote_debug) |
1385f66c | 1154 | fprintf_unfiltered (gdb_stdlog, "gdbsim_files_info: file \"%s\"\n", file); |
c906108c SS |
1155 | |
1156 | if (exec_bfd) | |
1157 | { | |
1385f66c PA |
1158 | fprintf_unfiltered (gdb_stdlog, "\tAttached to %s running program %s\n", |
1159 | target_shortname, file); | |
db04efe6 | 1160 | sim_info (sim_data->gdbsim_desc, 0); |
c906108c SS |
1161 | } |
1162 | } | |
1163 | ||
1164 | /* Clear the simulator's notion of what the break points are. */ | |
1165 | ||
1166 | static void | |
3c8b2eda | 1167 | gdbsim_mourn_inferior (struct target_ops *target) |
c5aa993b | 1168 | { |
db04efe6 KB |
1169 | struct sim_inferior_data *sim_data |
1170 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
1171 | ||
ea35711c | 1172 | if (remote_debug) |
1385f66c | 1173 | fprintf_unfiltered (gdb_stdlog, "gdbsim_mourn_inferior:\n"); |
c906108c SS |
1174 | |
1175 | remove_breakpoints (); | |
1176 | generic_mourn_inferior (); | |
db04efe6 | 1177 | delete_thread_silent (sim_data->remote_sim_ptid); |
c906108c SS |
1178 | } |
1179 | ||
c906108c SS |
1180 | /* Pass the command argument through to the simulator verbatim. The |
1181 | simulator must do any command interpretation work. */ | |
1182 | ||
1183 | void | |
fba45db2 | 1184 | simulator_command (char *args, int from_tty) |
c906108c | 1185 | { |
db04efe6 KB |
1186 | struct sim_inferior_data *sim_data; |
1187 | ||
1188 | /* We use inferior_data() instead of get_sim_inferior_data() here in | |
1189 | order to avoid attaching a sim_inferior_data struct to an | |
1190 | inferior unnecessarily. The reason we take such care here is due | |
1191 | to the fact that this function, simulator_command(), may be called | |
1192 | even when the sim target is not active. If we were to use | |
1193 | get_sim_inferior_data() here, it is possible that this call would | |
1194 | be made either prior to gdbsim_open() or after gdbsim_close(), | |
1195 | thus allocating memory that would not be garbage collected until | |
1196 | the ultimate destruction of the associated inferior. */ | |
1197 | ||
653090d3 SM |
1198 | sim_data = ((struct sim_inferior_data *) |
1199 | inferior_data (current_inferior (), sim_inferior_data_key)); | |
db04efe6 | 1200 | if (sim_data == NULL || sim_data->gdbsim_desc == NULL) |
c906108c SS |
1201 | { |
1202 | ||
1203 | /* PREVIOUSLY: The user may give a command before the simulator | |
74228e77 RM |
1204 | is opened. [...] (??? assuming of course one wishes to |
1205 | continue to allow commands to be sent to unopened simulators, | |
1206 | which isn't entirely unreasonable). */ | |
c906108c SS |
1207 | |
1208 | /* The simulator is a builtin abstraction of a remote target. | |
74228e77 RM |
1209 | Consistent with that model, access to the simulator, via sim |
1210 | commands, is restricted to the period when the channel to the | |
1211 | simulator is open. */ | |
c906108c | 1212 | |
8a3fe4f8 | 1213 | error (_("Not connected to the simulator target")); |
c906108c SS |
1214 | } |
1215 | ||
db04efe6 | 1216 | sim_do_command (sim_data->gdbsim_desc, args); |
c906108c SS |
1217 | |
1218 | /* Invalidate the register cache, in case the simulator command does | |
0df8b418 | 1219 | something funny. */ |
c5aa993b | 1220 | registers_changed (); |
c906108c SS |
1221 | } |
1222 | ||
386535dd PA |
1223 | static void |
1224 | sim_command_completer (struct cmd_list_element *ignore, | |
1225 | completion_tracker &tracker, | |
1226 | const char *text, const char *word) | |
56a9aa1d MF |
1227 | { |
1228 | struct sim_inferior_data *sim_data; | |
1229 | ||
653090d3 SM |
1230 | sim_data = ((struct sim_inferior_data *) |
1231 | inferior_data (current_inferior (), sim_inferior_data_key)); | |
56a9aa1d | 1232 | if (sim_data == NULL || sim_data->gdbsim_desc == NULL) |
386535dd | 1233 | return; |
56a9aa1d | 1234 | |
386535dd PA |
1235 | /* sim_complete_command returns a NULL-terminated malloc'ed array of |
1236 | malloc'ed strings. */ | |
1237 | struct sim_completions_deleter | |
1238 | { | |
1239 | void operator() (char **ptr) const | |
1240 | { | |
1241 | for (size_t i = 0; ptr[i] != NULL; i++) | |
1242 | xfree (ptr[i]); | |
1243 | xfree (ptr); | |
1244 | } | |
1245 | }; | |
1246 | ||
1247 | std::unique_ptr<char *[], sim_completions_deleter> sim_completions | |
1248 | (sim_complete_command (sim_data->gdbsim_desc, text, word)); | |
1249 | if (sim_completions == NULL) | |
1250 | return; | |
34370865 | 1251 | |
386535dd PA |
1252 | /* Count the elements and add completions from tail to head because |
1253 | below we'll swap elements out of the array in case add_completion | |
1254 | throws and the deleter deletes until it finds a NULL element. */ | |
1255 | size_t count = 0; | |
1256 | while (sim_completions[count] != NULL) | |
1257 | count++; | |
34370865 | 1258 | |
386535dd PA |
1259 | for (size_t i = count; i > 0; i--) |
1260 | { | |
1261 | gdb::unique_xmalloc_ptr<char> match (sim_completions[i - 1]); | |
1262 | sim_completions[i - 1] = NULL; | |
1263 | tracker.add_completion (std::move (match)); | |
1264 | } | |
56a9aa1d MF |
1265 | } |
1266 | ||
9de2bdd7 PA |
1267 | /* Check to see if a thread is still alive. */ |
1268 | ||
1269 | static int | |
28439f5e | 1270 | gdbsim_thread_alive (struct target_ops *ops, ptid_t ptid) |
9de2bdd7 | 1271 | { |
db04efe6 KB |
1272 | struct sim_inferior_data *sim_data |
1273 | = get_sim_inferior_data_by_ptid (ptid, SIM_INSTANCE_NOT_NEEDED); | |
1274 | ||
1275 | if (sim_data == NULL) | |
1276 | return 0; | |
1277 | ||
1278 | if (ptid_equal (ptid, sim_data->remote_sim_ptid)) | |
9de2bdd7 PA |
1279 | /* The simulators' task is always alive. */ |
1280 | return 1; | |
1281 | ||
1282 | return 0; | |
1283 | } | |
1284 | ||
1285 | /* Convert a thread ID to a string. Returns the string in a static | |
1286 | buffer. */ | |
1287 | ||
7a114964 | 1288 | static const char * |
117de6a9 | 1289 | gdbsim_pid_to_str (struct target_ops *ops, ptid_t ptid) |
9de2bdd7 | 1290 | { |
9de2bdd7 PA |
1291 | return normal_pid_to_str (ptid); |
1292 | } | |
1293 | ||
0c012db1 KB |
1294 | /* Simulator memory may be accessed after the program has been loaded. */ |
1295 | ||
b261e0c5 | 1296 | static int |
0c012db1 KB |
1297 | gdbsim_has_all_memory (struct target_ops *ops) |
1298 | { | |
1299 | struct sim_inferior_data *sim_data | |
1300 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
1301 | ||
1302 | if (!sim_data->program_loaded) | |
1303 | return 0; | |
1304 | ||
1305 | return 1; | |
1306 | } | |
1307 | ||
b261e0c5 | 1308 | static int |
0c012db1 KB |
1309 | gdbsim_has_memory (struct target_ops *ops) |
1310 | { | |
1311 | struct sim_inferior_data *sim_data | |
1312 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
1313 | ||
1314 | if (!sim_data->program_loaded) | |
1315 | return 0; | |
1316 | ||
1317 | return 1; | |
1318 | } | |
1319 | ||
0df8b418 | 1320 | /* Define the target subroutine names. */ |
c906108c | 1321 | |
c5aa993b JM |
1322 | struct target_ops gdbsim_ops; |
1323 | ||
1324 | static void | |
1325 | init_gdbsim_ops (void) | |
1326 | { | |
1327 | gdbsim_ops.to_shortname = "sim"; | |
1328 | gdbsim_ops.to_longname = "simulator"; | |
1329 | gdbsim_ops.to_doc = "Use the compiled-in simulator."; | |
1330 | gdbsim_ops.to_open = gdbsim_open; | |
1331 | gdbsim_ops.to_close = gdbsim_close; | |
c5aa993b | 1332 | gdbsim_ops.to_detach = gdbsim_detach; |
c5aa993b JM |
1333 | gdbsim_ops.to_resume = gdbsim_resume; |
1334 | gdbsim_ops.to_wait = gdbsim_wait; | |
c5aa993b JM |
1335 | gdbsim_ops.to_fetch_registers = gdbsim_fetch_register; |
1336 | gdbsim_ops.to_store_registers = gdbsim_store_register; | |
1337 | gdbsim_ops.to_prepare_to_store = gdbsim_prepare_to_store; | |
146ec4db | 1338 | gdbsim_ops.to_xfer_partial = gdbsim_xfer_partial; |
c5aa993b | 1339 | gdbsim_ops.to_files_info = gdbsim_files_info; |
8181d85f DJ |
1340 | gdbsim_ops.to_insert_breakpoint = memory_insert_breakpoint; |
1341 | gdbsim_ops.to_remove_breakpoint = memory_remove_breakpoint; | |
c5aa993b JM |
1342 | gdbsim_ops.to_kill = gdbsim_kill; |
1343 | gdbsim_ops.to_load = gdbsim_load; | |
c5aa993b | 1344 | gdbsim_ops.to_create_inferior = gdbsim_create_inferior; |
c5aa993b | 1345 | gdbsim_ops.to_mourn_inferior = gdbsim_mourn_inferior; |
bfedc46a | 1346 | gdbsim_ops.to_interrupt = gdbsim_interrupt; |
9de2bdd7 PA |
1347 | gdbsim_ops.to_thread_alive = gdbsim_thread_alive; |
1348 | gdbsim_ops.to_pid_to_str = gdbsim_pid_to_str; | |
c5aa993b | 1349 | gdbsim_ops.to_stratum = process_stratum; |
0c012db1 KB |
1350 | gdbsim_ops.to_has_all_memory = gdbsim_has_all_memory; |
1351 | gdbsim_ops.to_has_memory = gdbsim_has_memory; | |
c35b1492 PA |
1352 | gdbsim_ops.to_has_stack = default_child_has_stack; |
1353 | gdbsim_ops.to_has_registers = default_child_has_registers; | |
1354 | gdbsim_ops.to_has_execution = default_child_has_execution; | |
c5aa993b | 1355 | gdbsim_ops.to_magic = OPS_MAGIC; |
c906108c SS |
1356 | } |
1357 | ||
1358 | void | |
fba45db2 | 1359 | _initialize_remote_sim (void) |
c906108c | 1360 | { |
56a9aa1d MF |
1361 | struct cmd_list_element *c; |
1362 | ||
c5aa993b | 1363 | init_gdbsim_ops (); |
c906108c SS |
1364 | add_target (&gdbsim_ops); |
1365 | ||
56a9aa1d MF |
1366 | c = add_com ("sim", class_obscure, simulator_command, |
1367 | _("Send a command to the simulator.")); | |
1368 | set_cmd_completer (c, sim_command_completer); | |
9de2bdd7 | 1369 | |
db04efe6 | 1370 | sim_inferior_data_key |
c5d9b215 | 1371 | = register_inferior_data_with_cleanup (NULL, sim_inferior_data_cleanup); |
c906108c | 1372 | } |