Commit | Line | Data |
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c906108c | 1 | /* Generic remote debugging interface for simulators. |
0a65a603 | 2 | |
e2882c85 | 3 | Copyright (C) 1993-2018 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 | static void init_callbacks (void); |
c906108c | 48 | |
a14ed312 | 49 | static void end_callbacks (void); |
c906108c | 50 | |
a14ed312 | 51 | static int gdb_os_write_stdout (host_callback *, const char *, int); |
c906108c | 52 | |
a14ed312 | 53 | static void gdb_os_flush_stdout (host_callback *); |
c906108c | 54 | |
a14ed312 | 55 | static int gdb_os_write_stderr (host_callback *, const char *, int); |
c906108c | 56 | |
a14ed312 | 57 | static void gdb_os_flush_stderr (host_callback *); |
c906108c | 58 | |
a14ed312 | 59 | static int gdb_os_poll_quit (host_callback *); |
c906108c | 60 | |
0df8b418 | 61 | /* printf_filtered is depreciated. */ |
a14ed312 | 62 | static void gdb_os_printf_filtered (host_callback *, const char *, ...); |
c906108c | 63 | |
a14ed312 | 64 | static void gdb_os_vprintf_filtered (host_callback *, const char *, va_list); |
c906108c | 65 | |
a14ed312 | 66 | static void gdb_os_evprintf_filtered (host_callback *, const char *, va_list); |
c906108c | 67 | |
c25c4a8b JK |
68 | static void gdb_os_error (host_callback *, const char *, ...) |
69 | ATTRIBUTE_NORETURN; | |
c906108c | 70 | |
7d85a9c0 | 71 | static void gdbsim_kill (struct target_ops *); |
c906108c | 72 | |
9cbe5fff TT |
73 | static void gdbsim_load (struct target_ops *self, const char *prog, |
74 | int fromtty); | |
c906108c | 75 | |
74228e77 | 76 | static void gdbsim_open (const char *args, int from_tty); |
c906108c | 77 | |
de90e03d | 78 | static void gdbsim_close (struct target_ops *self); |
c906108c | 79 | |
6e1e1966 | 80 | static void gdbsim_detach (struct target_ops *ops, inferior *inf, int from_tty); |
c906108c | 81 | |
f32dbf8c MM |
82 | static void gdbsim_prepare_to_store (struct target_ops *self, |
83 | 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 | |
f6cfb427 | 89 | static void gdbsim_interrupt (struct target_ops *self); |
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; | |
653090d3 | 153 | SIM_DESC new_sim_desc = (SIM_DESC) arg; |
db04efe6 | 154 | |
653090d3 SM |
155 | sim_data = ((struct sim_inferior_data *) |
156 | inferior_data (inf, sim_inferior_data_key)); | |
db04efe6 KB |
157 | |
158 | return (sim_data != NULL && sim_data->gdbsim_desc == new_sim_desc); | |
159 | } | |
160 | ||
161 | /* Flags indicating whether or not a sim instance is needed. One of these | |
162 | flags should be passed to get_sim_inferior_data(). */ | |
163 | ||
164 | enum {SIM_INSTANCE_NOT_NEEDED = 0, SIM_INSTANCE_NEEDED = 1}; | |
165 | ||
166 | /* Obtain pointer to per-inferior simulator data, allocating it if necessary. | |
167 | Attempt to open the sim if SIM_INSTANCE_NEEDED is true. */ | |
168 | ||
169 | static struct sim_inferior_data * | |
170 | get_sim_inferior_data (struct inferior *inf, int sim_instance_needed) | |
171 | { | |
172 | SIM_DESC sim_desc = NULL; | |
173 | struct sim_inferior_data *sim_data | |
653090d3 | 174 | = (struct sim_inferior_data *) inferior_data (inf, sim_inferior_data_key); |
db04efe6 KB |
175 | |
176 | /* Try to allocate a new sim instance, if needed. We do this ahead of | |
177 | a potential allocation of a sim_inferior_data struct in order to | |
178 | avoid needlessly allocating that struct in the event that the sim | |
179 | instance allocation fails. */ | |
74228e77 | 180 | if (sim_instance_needed == SIM_INSTANCE_NEEDED |
db04efe6 KB |
181 | && (sim_data == NULL || sim_data->gdbsim_desc == NULL)) |
182 | { | |
183 | struct inferior *idup; | |
184 | sim_desc = sim_open (SIM_OPEN_DEBUG, &gdb_callback, exec_bfd, sim_argv); | |
185 | if (sim_desc == NULL) | |
186 | error (_("Unable to create simulator instance for inferior %d."), | |
187 | inf->num); | |
188 | ||
189 | idup = iterate_over_inferiors (check_for_duplicate_sim_descriptor, | |
74228e77 | 190 | sim_desc); |
db04efe6 KB |
191 | if (idup != NULL) |
192 | { | |
193 | /* We don't close the descriptor due to the fact that it's | |
194 | shared with some other inferior. If we were to close it, | |
195 | that might needlessly muck up the other inferior. Of | |
196 | course, it's possible that the damage has already been | |
197 | done... Note that it *will* ultimately be closed during | |
198 | cleanup of the other inferior. */ | |
199 | sim_desc = NULL; | |
200 | error ( | |
201 | _("Inferior %d and inferior %d would have identical simulator state.\n" | |
202 | "(This simulator does not support the running of more than one inferior.)"), | |
74228e77 RM |
203 | inf->num, idup->num); |
204 | } | |
db04efe6 KB |
205 | } |
206 | ||
207 | if (sim_data == NULL) | |
208 | { | |
41bf6aca | 209 | sim_data = XCNEW(struct sim_inferior_data); |
db04efe6 KB |
210 | set_inferior_data (inf, sim_inferior_data_key, sim_data); |
211 | ||
212 | /* Allocate a ptid for this inferior. */ | |
213 | sim_data->remote_sim_ptid = ptid_build (next_pid, 0, next_pid); | |
214 | next_pid++; | |
215 | ||
216 | /* Initialize the other instance variables. */ | |
217 | sim_data->program_loaded = 0; | |
218 | sim_data->gdbsim_desc = sim_desc; | |
a493e3e2 | 219 | sim_data->resume_siggnal = GDB_SIGNAL_0; |
db04efe6 KB |
220 | sim_data->resume_step = 0; |
221 | } | |
222 | else if (sim_desc) | |
223 | { | |
224 | /* This handles the case where sim_data was allocated prior to | |
74228e77 | 225 | needing a sim instance. */ |
db04efe6 KB |
226 | sim_data->gdbsim_desc = sim_desc; |
227 | } | |
c906108c | 228 | |
c906108c | 229 | |
db04efe6 KB |
230 | return sim_data; |
231 | } | |
232 | ||
233 | /* Return pointer to per-inferior simulator data using PTID to find the | |
234 | inferior in question. Return NULL when no inferior is found or | |
235 | when ptid has a zero or negative pid component. */ | |
236 | ||
237 | static struct sim_inferior_data * | |
238 | get_sim_inferior_data_by_ptid (ptid_t ptid, int sim_instance_needed) | |
239 | { | |
240 | struct inferior *inf; | |
241 | int pid = ptid_get_pid (ptid); | |
242 | ||
243 | if (pid <= 0) | |
244 | return NULL; | |
74228e77 | 245 | |
db04efe6 KB |
246 | inf = find_inferior_pid (pid); |
247 | ||
248 | if (inf) | |
249 | return get_sim_inferior_data (inf, sim_instance_needed); | |
250 | else | |
251 | return NULL; | |
252 | } | |
253 | ||
254 | /* Free the per-inferior simulator data. */ | |
255 | ||
256 | static void | |
257 | sim_inferior_data_cleanup (struct inferior *inf, void *data) | |
258 | { | |
653090d3 | 259 | struct sim_inferior_data *sim_data = (struct sim_inferior_data *) data; |
db04efe6 KB |
260 | |
261 | if (sim_data != NULL) | |
262 | { | |
263 | if (sim_data->gdbsim_desc) | |
264 | { | |
265 | sim_close (sim_data->gdbsim_desc, 0); | |
266 | sim_data->gdbsim_desc = NULL; | |
267 | } | |
268 | xfree (sim_data); | |
269 | } | |
270 | } | |
9de2bdd7 | 271 | |
c906108c | 272 | static void |
146ec4db | 273 | dump_mem (const gdb_byte *buf, int len) |
c906108c | 274 | { |
1385f66c | 275 | fputs_unfiltered ("\t", gdb_stdlog); |
3d468296 AB |
276 | |
277 | if (len == 8 || len == 4) | |
c906108c | 278 | { |
3d468296 | 279 | uint32_t l[2]; |
123f5f96 | 280 | |
3d468296 | 281 | memcpy (l, buf, len); |
1385f66c | 282 | fprintf_unfiltered (gdb_stdlog, "0x%08x", l[0]); |
3d468296 | 283 | if (len == 8) |
1385f66c | 284 | fprintf_unfiltered (gdb_stdlog, " 0x%08x", l[1]); |
3d468296 AB |
285 | } |
286 | else | |
287 | { | |
288 | int i; | |
123f5f96 | 289 | |
3d468296 | 290 | for (i = 0; i < len; i++) |
1385f66c | 291 | fprintf_unfiltered (gdb_stdlog, "0x%02x ", buf[i]); |
c906108c | 292 | } |
3d468296 | 293 | |
1385f66c | 294 | fputs_unfiltered ("\n", gdb_stdlog); |
c906108c SS |
295 | } |
296 | ||
c906108c SS |
297 | /* Initialize gdb_callback. */ |
298 | ||
299 | static void | |
fba45db2 | 300 | init_callbacks (void) |
c906108c | 301 | { |
c5aa993b | 302 | if (!callbacks_initialized) |
c906108c SS |
303 | { |
304 | gdb_callback = default_callback; | |
305 | gdb_callback.init (&gdb_callback); | |
306 | gdb_callback.write_stdout = gdb_os_write_stdout; | |
307 | gdb_callback.flush_stdout = gdb_os_flush_stdout; | |
308 | gdb_callback.write_stderr = gdb_os_write_stderr; | |
309 | gdb_callback.flush_stderr = gdb_os_flush_stderr; | |
310 | gdb_callback.printf_filtered = gdb_os_printf_filtered; | |
311 | gdb_callback.vprintf_filtered = gdb_os_vprintf_filtered; | |
312 | gdb_callback.evprintf_filtered = gdb_os_evprintf_filtered; | |
313 | gdb_callback.error = gdb_os_error; | |
314 | gdb_callback.poll_quit = gdb_os_poll_quit; | |
315 | gdb_callback.magic = HOST_CALLBACK_MAGIC; | |
316 | callbacks_initialized = 1; | |
317 | } | |
318 | } | |
319 | ||
320 | /* Release callbacks (free resources used by them). */ | |
321 | ||
322 | static void | |
fba45db2 | 323 | end_callbacks (void) |
c906108c SS |
324 | { |
325 | if (callbacks_initialized) | |
326 | { | |
327 | gdb_callback.shutdown (&gdb_callback); | |
328 | callbacks_initialized = 0; | |
329 | } | |
330 | } | |
331 | ||
332 | /* GDB version of os_write_stdout callback. */ | |
333 | ||
c5aa993b | 334 | static int |
fba45db2 | 335 | gdb_os_write_stdout (host_callback *p, const char *buf, int len) |
c906108c SS |
336 | { |
337 | int i; | |
338 | char b[2]; | |
339 | ||
d9fcf2fb | 340 | ui_file_write (gdb_stdtarg, buf, len); |
c906108c SS |
341 | return len; |
342 | } | |
343 | ||
344 | /* GDB version of os_flush_stdout callback. */ | |
345 | ||
346 | static void | |
fba45db2 | 347 | gdb_os_flush_stdout (host_callback *p) |
c906108c | 348 | { |
4ce44c66 | 349 | gdb_flush (gdb_stdtarg); |
c906108c SS |
350 | } |
351 | ||
352 | /* GDB version of os_write_stderr callback. */ | |
353 | ||
c5aa993b | 354 | static int |
fba45db2 | 355 | gdb_os_write_stderr (host_callback *p, const char *buf, int len) |
c906108c SS |
356 | { |
357 | int i; | |
358 | char b[2]; | |
359 | ||
c5aa993b | 360 | for (i = 0; i < len; i++) |
c906108c SS |
361 | { |
362 | b[0] = buf[i]; | |
363 | b[1] = 0; | |
22e8e3c7 | 364 | fputs_unfiltered (b, gdb_stdtargerr); |
c906108c SS |
365 | } |
366 | return len; | |
367 | } | |
368 | ||
369 | /* GDB version of os_flush_stderr callback. */ | |
370 | ||
371 | static void | |
fba45db2 | 372 | gdb_os_flush_stderr (host_callback *p) |
c906108c | 373 | { |
22e8e3c7 | 374 | gdb_flush (gdb_stdtargerr); |
c906108c SS |
375 | } |
376 | ||
377 | /* GDB version of printf_filtered callback. */ | |
378 | ||
7104e59b SM |
379 | static void ATTRIBUTE_PRINTF (2, 3) |
380 | gdb_os_printf_filtered (host_callback * p, const char *format, ...) | |
c906108c SS |
381 | { |
382 | va_list args; | |
c906108c | 383 | |
123f5f96 | 384 | va_start (args, format); |
c906108c | 385 | vfprintf_filtered (gdb_stdout, format, args); |
c906108c SS |
386 | va_end (args); |
387 | } | |
388 | ||
389 | /* GDB version of error vprintf_filtered. */ | |
390 | ||
7104e59b | 391 | static void ATTRIBUTE_PRINTF (2, 0) |
c5aa993b | 392 | gdb_os_vprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c SS |
393 | { |
394 | vfprintf_filtered (gdb_stdout, format, ap); | |
395 | } | |
396 | ||
397 | /* GDB version of error evprintf_filtered. */ | |
398 | ||
7104e59b | 399 | static void ATTRIBUTE_PRINTF (2, 0) |
c5aa993b | 400 | gdb_os_evprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c SS |
401 | { |
402 | vfprintf_filtered (gdb_stderr, format, ap); | |
403 | } | |
404 | ||
405 | /* GDB version of error callback. */ | |
406 | ||
7104e59b | 407 | static void ATTRIBUTE_PRINTF (2, 3) |
58d4abe1 | 408 | gdb_os_error (host_callback * p, const char *format, ...) |
c906108c | 409 | { |
58d4abe1 | 410 | va_list args; |
123f5f96 | 411 | |
58d4abe1 PA |
412 | va_start (args, format); |
413 | verror (format, args); | |
414 | va_end (args); | |
c906108c SS |
415 | } |
416 | ||
8238d0bf | 417 | int |
e7faf938 | 418 | one2one_register_sim_regno (struct gdbarch *gdbarch, int regnum) |
8238d0bf AC |
419 | { |
420 | /* Only makes sense to supply raw registers. */ | |
e7faf938 | 421 | gdb_assert (regnum >= 0 && regnum < gdbarch_num_regs (gdbarch)); |
8238d0bf AC |
422 | return regnum; |
423 | } | |
424 | ||
c906108c | 425 | static void |
28439f5e PA |
426 | gdbsim_fetch_register (struct target_ops *ops, |
427 | struct regcache *regcache, int regno) | |
c906108c | 428 | { |
ac7936df | 429 | struct gdbarch *gdbarch = regcache->arch (); |
bcc0c096 | 430 | struct inferior *inf = find_inferior_ptid (regcache_get_ptid (regcache)); |
db04efe6 | 431 | struct sim_inferior_data *sim_data |
bcc0c096 | 432 | = get_sim_inferior_data (inf, SIM_INSTANCE_NEEDED); |
123f5f96 | 433 | |
c5aa993b | 434 | if (regno == -1) |
c906108c | 435 | { |
40a6adc1 | 436 | for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++) |
28439f5e | 437 | gdbsim_fetch_register (ops, regcache, regno); |
8238d0bf | 438 | return; |
c906108c | 439 | } |
8238d0bf | 440 | |
40a6adc1 | 441 | switch (gdbarch_register_sim_regno (gdbarch, regno)) |
c906108c | 442 | { |
8238d0bf AC |
443 | case LEGACY_SIM_REGNO_IGNORE: |
444 | break; | |
445 | case SIM_REGNO_DOES_NOT_EXIST: | |
446 | { | |
447 | /* For moment treat a `does not exist' register the same way | |
74228e77 | 448 | as an ``unavailable'' register. */ |
a4d1e79a | 449 | regcache->raw_supply_zeroed (regno); |
8238d0bf AC |
450 | break; |
451 | } | |
74228e77 | 452 | |
8238d0bf AC |
453 | default: |
454 | { | |
455 | static int warn_user = 1; | |
a4d1e79a AH |
456 | int regsize = register_size (gdbarch, regno); |
457 | gdb::byte_vector buf (regsize, 0); | |
8238d0bf | 458 | int nr_bytes; |
123f5f96 | 459 | |
40a6adc1 | 460 | gdb_assert (regno >= 0 && regno < gdbarch_num_regs (gdbarch)); |
db04efe6 | 461 | nr_bytes = sim_fetch_register (sim_data->gdbsim_desc, |
474c1661 | 462 | gdbarch_register_sim_regno |
40a6adc1 | 463 | (gdbarch, regno), |
a4d1e79a AH |
464 | buf.data (), regsize); |
465 | if (nr_bytes > 0 && nr_bytes != regsize && warn_user) | |
8238d0bf AC |
466 | { |
467 | fprintf_unfiltered (gdb_stderr, | |
0df8b418 MS |
468 | "Size of register %s (%d/%d) " |
469 | "incorrect (%d instead of %d))", | |
40a6adc1 | 470 | gdbarch_register_name (gdbarch, regno), |
474c1661 | 471 | regno, |
a4d1e79a AH |
472 | gdbarch_register_sim_regno (gdbarch, regno), |
473 | nr_bytes, regsize); | |
8238d0bf AC |
474 | warn_user = 0; |
475 | } | |
476 | /* FIXME: cagney/2002-05-27: Should check `nr_bytes == 0' | |
278a7cf7 | 477 | indicating that GDB and the SIM have different ideas about |
8238d0bf AC |
478 | which registers are fetchable. */ |
479 | /* Else if (nr_bytes < 0): an old simulator, that doesn't | |
480 | think to return the register size. Just assume all is ok. */ | |
a4d1e79a | 481 | regcache->raw_supply (regno, buf.data ()); |
ea35711c | 482 | if (remote_debug) |
8238d0bf | 483 | { |
1385f66c PA |
484 | fprintf_unfiltered (gdb_stdlog, |
485 | "gdbsim_fetch_register: %d", regno); | |
8238d0bf | 486 | /* FIXME: We could print something more intelligible. */ |
a4d1e79a | 487 | dump_mem (buf.data (), regsize); |
8238d0bf AC |
488 | } |
489 | break; | |
490 | } | |
c906108c SS |
491 | } |
492 | } | |
493 | ||
494 | ||
495 | static void | |
28439f5e PA |
496 | gdbsim_store_register (struct target_ops *ops, |
497 | struct regcache *regcache, int regno) | |
c906108c | 498 | { |
ac7936df | 499 | struct gdbarch *gdbarch = regcache->arch (); |
bcc0c096 | 500 | struct inferior *inf = find_inferior_ptid (regcache_get_ptid (regcache)); |
db04efe6 | 501 | struct sim_inferior_data *sim_data |
bcc0c096 | 502 | = get_sim_inferior_data (inf, SIM_INSTANCE_NEEDED); |
db04efe6 | 503 | |
c5aa993b | 504 | if (regno == -1) |
c906108c | 505 | { |
40a6adc1 | 506 | for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++) |
28439f5e | 507 | gdbsim_store_register (ops, regcache, regno); |
8238d0bf | 508 | return; |
c906108c | 509 | } |
40a6adc1 | 510 | else if (gdbarch_register_sim_regno (gdbarch, regno) >= 0) |
c906108c | 511 | { |
a4d1e79a AH |
512 | int regsize = register_size (gdbarch, regno); |
513 | gdb::byte_vector tmp (regsize); | |
c906108c | 514 | int nr_bytes; |
123f5f96 | 515 | |
a4d1e79a | 516 | regcache->cooked_read (regno, tmp.data ()); |
db04efe6 | 517 | nr_bytes = sim_store_register (sim_data->gdbsim_desc, |
474c1661 | 518 | gdbarch_register_sim_regno |
40a6adc1 | 519 | (gdbarch, regno), |
a4d1e79a AH |
520 | tmp.data (), regsize); |
521 | ||
522 | if (nr_bytes > 0 && nr_bytes != regsize) | |
8e65ff28 | 523 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 524 | _("Register size different to expected")); |
dae477fe | 525 | if (nr_bytes < 0) |
74228e77 RM |
526 | internal_error (__FILE__, __LINE__, |
527 | _("Register %d not updated"), regno); | |
dae477fe | 528 | if (nr_bytes == 0) |
74228e77 RM |
529 | warning (_("Register %s not updated"), |
530 | gdbarch_register_name (gdbarch, regno)); | |
dae477fe | 531 | |
ea35711c | 532 | if (remote_debug) |
c906108c | 533 | { |
1385f66c | 534 | fprintf_unfiltered (gdb_stdlog, "gdbsim_store_register: %d", regno); |
c906108c | 535 | /* FIXME: We could print something more intelligible. */ |
a4d1e79a | 536 | dump_mem (tmp.data (), regsize); |
c906108c SS |
537 | } |
538 | } | |
539 | } | |
540 | ||
541 | /* Kill the running program. This may involve closing any open files | |
542 | and releasing other resources acquired by the simulated program. */ | |
543 | ||
544 | static void | |
7d85a9c0 | 545 | gdbsim_kill (struct target_ops *ops) |
c906108c | 546 | { |
ea35711c | 547 | if (remote_debug) |
1385f66c | 548 | fprintf_unfiltered (gdb_stdlog, "gdbsim_kill\n"); |
c906108c SS |
549 | |
550 | /* There is no need to `kill' running simulator - the simulator is | |
52bb452f | 551 | not running. Mourning it is enough. */ |
bc1e6c81 | 552 | target_mourn_inferior (inferior_ptid); |
c906108c SS |
553 | } |
554 | ||
555 | /* Load an executable file into the target process. This is expected to | |
556 | not only bring new code into the target process, but also to update | |
557 | GDB's symbol tables to match. */ | |
558 | ||
559 | static void | |
9cbe5fff | 560 | gdbsim_load (struct target_ops *self, const char *args, int fromtty) |
c906108c | 561 | { |
b2b255bd | 562 | const char *prog; |
db04efe6 KB |
563 | struct sim_inferior_data *sim_data |
564 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NEEDED); | |
1986bccd | 565 | |
d1a41061 PP |
566 | if (args == NULL) |
567 | error_no_arg (_("program to load")); | |
1986bccd | 568 | |
773a1edc | 569 | gdb_argv argv (args); |
1986bccd AS |
570 | |
571 | prog = tilde_expand (argv[0]); | |
572 | ||
573 | if (argv[1] != NULL) | |
574 | error (_("GDB sim does not yet support a load offset.")); | |
575 | ||
ea35711c | 576 | if (remote_debug) |
1385f66c | 577 | fprintf_unfiltered (gdb_stdlog, "gdbsim_load: prog \"%s\"\n", prog); |
c906108c | 578 | |
c906108c SS |
579 | /* FIXME: We will print two messages on error. |
580 | Need error to either not print anything if passed NULL or need | |
581 | another routine that doesn't take any arguments. */ | |
db04efe6 | 582 | if (sim_load (sim_data->gdbsim_desc, prog, NULL, fromtty) == SIM_RC_FAIL) |
8a3fe4f8 | 583 | error (_("unable to load program")); |
c906108c SS |
584 | |
585 | /* FIXME: If a load command should reset the targets registers then | |
0df8b418 | 586 | a call to sim_create_inferior() should go here. */ |
c906108c | 587 | |
db04efe6 | 588 | sim_data->program_loaded = 1; |
c906108c SS |
589 | } |
590 | ||
591 | ||
39f77062 | 592 | /* Start an inferior process and set inferior_ptid to its pid. |
c906108c SS |
593 | EXEC_FILE is the file to run. |
594 | ARGS is a string containing the arguments to the program. | |
595 | ENV is the environment vector to pass. Errors reported with error(). | |
596 | On VxWorks and various standalone systems, we ignore exec_file. */ | |
597 | /* This is called not only when we first attach, but also when the | |
598 | user types "run" after having attached. */ | |
599 | ||
600 | static void | |
7c5ded6a SDJ |
601 | gdbsim_create_inferior (struct target_ops *target, const char *exec_file, |
602 | const std::string &allargs, char **env, int from_tty) | |
c906108c | 603 | { |
db04efe6 KB |
604 | struct sim_inferior_data *sim_data |
605 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NEEDED); | |
c906108c | 606 | int len; |
773a1edc | 607 | char *arg_buf; |
7c5ded6a | 608 | const char *args = allargs.c_str (); |
c906108c SS |
609 | |
610 | if (exec_file == 0 || exec_bfd == 0) | |
8a3fe4f8 | 611 | warning (_("No executable file specified.")); |
db04efe6 | 612 | if (!sim_data->program_loaded) |
8a3fe4f8 | 613 | warning (_("No program loaded.")); |
c906108c | 614 | |
ea35711c | 615 | if (remote_debug) |
1385f66c PA |
616 | fprintf_unfiltered (gdb_stdlog, |
617 | "gdbsim_create_inferior: exec_file \"%s\", args \"%s\"\n", | |
618 | (exec_file ? exec_file : "(NULL)"), | |
619 | args); | |
c906108c | 620 | |
db04efe6 | 621 | if (ptid_equal (inferior_ptid, sim_data->remote_sim_ptid)) |
7d85a9c0 | 622 | gdbsim_kill (target); |
c906108c SS |
623 | remove_breakpoints (); |
624 | init_wait_for_inferior (); | |
625 | ||
773a1edc | 626 | gdb_argv built_argv; |
c906108c SS |
627 | if (exec_file != NULL) |
628 | { | |
7c5ded6a | 629 | len = strlen (exec_file) + 1 + allargs.size () + 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); | |
773a1edc | 635 | built_argv.reset (arg_buf); |
c906108c | 636 | } |
ddd60447 | 637 | |
2a7c8fd5 AB |
638 | if (!have_inferiors ()) |
639 | init_thread_list (); | |
640 | ||
773a1edc TT |
641 | if (sim_create_inferior (sim_data->gdbsim_desc, exec_bfd, |
642 | built_argv.get (), env) | |
ddd60447 MF |
643 | != SIM_RC_OK) |
644 | error (_("Unable to create sim inferior.")); | |
c906108c | 645 | |
db04efe6 | 646 | inferior_ptid = sim_data->remote_sim_ptid; |
20176d8f | 647 | inferior_appeared (current_inferior (), ptid_get_pid (inferior_ptid)); |
9de2bdd7 PA |
648 | add_thread_silent (inferior_ptid); |
649 | ||
0df8b418 MS |
650 | insert_breakpoints (); /* Needed to get correct instruction |
651 | in cache. */ | |
c906108c | 652 | |
88056fbb | 653 | clear_proceed_status (0); |
c906108c SS |
654 | } |
655 | ||
656 | /* The open routine takes the rest of the parameters from the command, | |
657 | and (if successful) pushes a new target onto the stack. | |
658 | Targets should supply this routine, if only to provide an error message. */ | |
0df8b418 | 659 | /* Called when selecting the simulator. E.g. (gdb) target sim name. */ |
c906108c SS |
660 | |
661 | static void | |
014f9477 | 662 | gdbsim_open (const char *args, int from_tty) |
c906108c SS |
663 | { |
664 | int len; | |
665 | char *arg_buf; | |
db04efe6 | 666 | struct sim_inferior_data *sim_data; |
87d1b309 | 667 | const char *sysroot; |
db04efe6 | 668 | SIM_DESC gdbsim_desc; |
c906108c | 669 | |
87d1b309 MF |
670 | sysroot = gdb_sysroot; |
671 | if (is_target_filename (sysroot)) | |
672 | sysroot += strlen (TARGET_SYSROOT_PREFIX); | |
673 | ||
ea35711c | 674 | if (remote_debug) |
1385f66c PA |
675 | fprintf_unfiltered (gdb_stdlog, |
676 | "gdbsim_open: args \"%s\"\n", args ? args : "(null)"); | |
c906108c | 677 | |
db04efe6 KB |
678 | /* Ensure that the sim target is not on the target stack. This is |
679 | necessary, because if it is on the target stack, the call to | |
680 | push_target below will invoke sim_close(), thus freeing various | |
681 | state (including a sim instance) that we allocate prior to | |
682 | invoking push_target(). We want to delay the push_target() | |
683 | operation until after we complete those operations which could | |
684 | error out. */ | |
685 | if (gdbsim_is_open) | |
c906108c SS |
686 | unpush_target (&gdbsim_ops); |
687 | ||
c5aa993b | 688 | len = (7 + 1 /* gdbsim */ |
c906108c SS |
689 | + strlen (" -E little") |
690 | + strlen (" --architecture=xxxxxxxxxx") | |
23bf70af | 691 | + strlen (" --sysroot=") + strlen (sysroot) + |
c906108c | 692 | + (args ? strlen (args) : 0) |
c5aa993b | 693 | + 50) /* slack */ ; |
c906108c | 694 | arg_buf = (char *) alloca (len); |
c5aa993b | 695 | strcpy (arg_buf, "gdbsim"); /* 7 */ |
b6d373df | 696 | /* Specify the byte order for the target when it is explicitly |
0df8b418 | 697 | specified by the user (not auto detected). */ |
b6d373df | 698 | switch (selected_byte_order ()) |
c906108c | 699 | { |
a8cf2722 AC |
700 | case BFD_ENDIAN_BIG: |
701 | strcat (arg_buf, " -E big"); | |
702 | break; | |
703 | case BFD_ENDIAN_LITTLE: | |
704 | strcat (arg_buf, " -E little"); | |
705 | break; | |
706 | case BFD_ENDIAN_UNKNOWN: | |
707 | break; | |
c906108c SS |
708 | } |
709 | /* Specify the architecture of the target when it has been | |
710 | explicitly specified */ | |
a8cf2722 | 711 | if (selected_architecture_name () != NULL) |
c906108c SS |
712 | { |
713 | strcat (arg_buf, " --architecture="); | |
a8cf2722 | 714 | strcat (arg_buf, selected_architecture_name ()); |
c906108c | 715 | } |
f4b8c29b MF |
716 | /* Pass along gdb's concept of the sysroot. */ |
717 | strcat (arg_buf, " --sysroot="); | |
23bf70af | 718 | strcat (arg_buf, sysroot); |
c906108c SS |
719 | /* finally, any explicit args */ |
720 | if (args) | |
721 | { | |
c5aa993b | 722 | strcat (arg_buf, " "); /* 1 */ |
c906108c SS |
723 | strcat (arg_buf, args); |
724 | } | |
773a1edc | 725 | |
74cbb09e SM |
726 | gdb_argv argv (arg_buf); |
727 | sim_argv = argv.get (); | |
c906108c SS |
728 | |
729 | init_callbacks (); | |
db04efe6 | 730 | gdbsim_desc = sim_open (SIM_OPEN_DEBUG, &gdb_callback, exec_bfd, sim_argv); |
c906108c SS |
731 | |
732 | if (gdbsim_desc == 0) | |
db04efe6 | 733 | { |
db04efe6 KB |
734 | sim_argv = NULL; |
735 | error (_("unable to create simulator instance")); | |
736 | } | |
737 | ||
74cbb09e | 738 | argv.release (); |
773a1edc | 739 | |
db04efe6 KB |
740 | /* Reset the pid numberings for this batch of sim instances. */ |
741 | next_pid = INITIAL_PID; | |
742 | ||
743 | /* Allocate the inferior data, but do not allocate a sim instance | |
744 | since we've already just done that. */ | |
0df8b418 MS |
745 | sim_data = get_sim_inferior_data (current_inferior (), |
746 | SIM_INSTANCE_NOT_NEEDED); | |
db04efe6 KB |
747 | |
748 | sim_data->gdbsim_desc = gdbsim_desc; | |
c906108c SS |
749 | |
750 | push_target (&gdbsim_ops); | |
c906108c | 751 | printf_filtered ("Connected to the simulator.\n"); |
52bb452f DJ |
752 | |
753 | /* There's nothing running after "target sim" or "load"; not until | |
754 | "run". */ | |
755 | inferior_ptid = null_ptid; | |
db04efe6 KB |
756 | |
757 | gdbsim_is_open = 1; | |
758 | } | |
759 | ||
760 | /* Callback for iterate_over_inferiors. Called (indirectly) by | |
761 | gdbsim_close(). */ | |
762 | ||
763 | static int | |
764 | gdbsim_close_inferior (struct inferior *inf, void *arg) | |
765 | { | |
653090d3 SM |
766 | struct sim_inferior_data *sim_data |
767 | = (struct sim_inferior_data *) inferior_data (inf, sim_inferior_data_key); | |
db04efe6 KB |
768 | if (sim_data != NULL) |
769 | { | |
770 | ptid_t ptid = sim_data->remote_sim_ptid; | |
771 | ||
772 | sim_inferior_data_cleanup (inf, sim_data); | |
773 | set_inferior_data (inf, sim_inferior_data_key, NULL); | |
774 | ||
775 | /* Having a ptid allocated and stored in remote_sim_ptid does | |
0df8b418 | 776 | not mean that a corresponding inferior was ever created. |
db04efe6 KB |
777 | Thus we need to verify the existence of an inferior using the |
778 | pid in question before setting inferior_ptid via | |
779 | switch_to_thread() or mourning the inferior. */ | |
c9657e70 | 780 | if (find_inferior_ptid (ptid) != NULL) |
db04efe6 KB |
781 | { |
782 | switch_to_thread (ptid); | |
783 | generic_mourn_inferior (); | |
784 | } | |
785 | } | |
786 | ||
787 | return 0; | |
c906108c SS |
788 | } |
789 | ||
0df8b418 | 790 | /* Close out all files and local state before this target loses control. */ |
c906108c SS |
791 | |
792 | static void | |
de90e03d | 793 | gdbsim_close (struct target_ops *self) |
c906108c | 794 | { |
db04efe6 KB |
795 | struct sim_inferior_data *sim_data |
796 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
797 | ||
ea35711c | 798 | if (remote_debug) |
1385f66c | 799 | fprintf_unfiltered (gdb_stdlog, "gdbsim_close\n"); |
c906108c | 800 | |
db04efe6 | 801 | iterate_over_inferiors (gdbsim_close_inferior, NULL); |
c906108c | 802 | |
db04efe6 | 803 | if (sim_argv != NULL) |
c906108c | 804 | { |
db04efe6 KB |
805 | freeargv (sim_argv); |
806 | sim_argv = NULL; | |
c906108c SS |
807 | } |
808 | ||
809 | end_callbacks (); | |
db04efe6 KB |
810 | |
811 | gdbsim_is_open = 0; | |
c906108c SS |
812 | } |
813 | ||
814 | /* Takes a program previously attached to and detaches it. | |
815 | The program may resume execution (some targets do, some don't) and will | |
816 | no longer stop on signals, etc. We better not have left any breakpoints | |
6bd6f3b6 SM |
817 | in the program or it'll die when it hits one. FROM_TTY says whether to be |
818 | verbose or not. */ | |
c906108c SS |
819 | /* Terminate the open connection to the remote debugger. |
820 | Use this when you want to detach and do something else with your gdb. */ | |
821 | ||
822 | static void | |
6e1e1966 | 823 | gdbsim_detach (struct target_ops *ops, inferior *inf, int from_tty) |
c906108c | 824 | { |
ea35711c | 825 | if (remote_debug) |
6bd6f3b6 | 826 | fprintf_unfiltered (gdb_stdlog, "gdbsim_detach\n"); |
c906108c | 827 | |
7fdc1521 | 828 | unpush_target (ops); /* calls gdbsim_close to do the real work */ |
c906108c SS |
829 | if (from_tty) |
830 | printf_filtered ("Ending simulator %s debugging\n", target_shortname); | |
831 | } | |
c5aa993b | 832 | |
c906108c SS |
833 | /* Resume execution of the target process. STEP says whether to single-step |
834 | or to run free; SIGGNAL is the signal value (e.g. SIGINT) to be given | |
835 | to the target, or zero for no signal. */ | |
836 | ||
db04efe6 KB |
837 | struct resume_data |
838 | { | |
2ea28649 | 839 | enum gdb_signal siggnal; |
db04efe6 KB |
840 | int step; |
841 | }; | |
842 | ||
843 | static int | |
844 | gdbsim_resume_inferior (struct inferior *inf, void *arg) | |
845 | { | |
846 | struct sim_inferior_data *sim_data | |
847 | = get_sim_inferior_data (inf, SIM_INSTANCE_NOT_NEEDED); | |
653090d3 | 848 | struct resume_data *rd = (struct resume_data *) arg; |
db04efe6 KB |
849 | |
850 | if (sim_data) | |
851 | { | |
852 | sim_data->resume_siggnal = rd->siggnal; | |
853 | sim_data->resume_step = rd->step; | |
854 | ||
855 | if (remote_debug) | |
1385f66c PA |
856 | fprintf_unfiltered (gdb_stdlog, |
857 | _("gdbsim_resume: pid %d, step %d, signal %d\n"), | |
858 | inf->pid, rd->step, rd->siggnal); | |
db04efe6 KB |
859 | } |
860 | ||
861 | /* When called from iterate_over_inferiors, a zero return causes the | |
862 | iteration process to proceed until there are no more inferiors to | |
863 | consider. */ | |
864 | return 0; | |
865 | } | |
c906108c SS |
866 | |
867 | static void | |
2fb89e62 | 868 | gdbsim_resume (struct target_ops *ops, |
2ea28649 | 869 | ptid_t ptid, int step, enum gdb_signal siggnal) |
c906108c | 870 | { |
db04efe6 KB |
871 | struct resume_data rd; |
872 | struct sim_inferior_data *sim_data | |
873 | = get_sim_inferior_data_by_ptid (ptid, SIM_INSTANCE_NOT_NEEDED); | |
874 | ||
875 | rd.siggnal = siggnal; | |
876 | rd.step = step; | |
877 | ||
0df8b418 | 878 | /* We don't access any sim_data members within this function. |
db04efe6 KB |
879 | What's of interest is whether or not the call to |
880 | get_sim_inferior_data_by_ptid(), above, is able to obtain a | |
881 | non-NULL pointer. If it managed to obtain a non-NULL pointer, we | |
882 | know we have a single inferior to consider. If it's NULL, we | |
883 | either have multiple inferiors to resume or an error condition. */ | |
884 | ||
885 | if (sim_data) | |
c9657e70 | 886 | gdbsim_resume_inferior (find_inferior_ptid (ptid), &rd); |
db04efe6 KB |
887 | else if (ptid_equal (ptid, minus_one_ptid)) |
888 | iterate_over_inferiors (gdbsim_resume_inferior, &rd); | |
889 | else | |
8a3fe4f8 | 890 | error (_("The program is not being run.")); |
c906108c SS |
891 | } |
892 | ||
bfedc46a | 893 | /* Notify the simulator of an asynchronous request to interrupt. |
c5aa993b | 894 | |
bfedc46a | 895 | The simulator shall ensure that the interrupt request is eventually |
c906108c | 896 | delivered to the simulator. If the call is made while the |
bfedc46a | 897 | simulator is not running then the interrupt request is processed when |
c906108c SS |
898 | the simulator is next resumed. |
899 | ||
db04efe6 KB |
900 | For simulators that do not support this operation, just abort. */ |
901 | ||
902 | static int | |
bfedc46a | 903 | gdbsim_interrupt_inferior (struct inferior *inf, void *arg) |
db04efe6 KB |
904 | { |
905 | struct sim_inferior_data *sim_data | |
906 | = get_sim_inferior_data (inf, SIM_INSTANCE_NEEDED); | |
907 | ||
908 | if (sim_data) | |
909 | { | |
910 | if (!sim_stop (sim_data->gdbsim_desc)) | |
911 | { | |
912 | quit (); | |
913 | } | |
914 | } | |
915 | ||
916 | /* When called from iterate_over_inferiors, a zero return causes the | |
917 | iteration process to proceed until there are no more inferiors to | |
918 | consider. */ | |
919 | return 0; | |
920 | } | |
c906108c SS |
921 | |
922 | static void | |
f6cfb427 | 923 | gdbsim_interrupt (struct target_ops *self) |
c906108c | 924 | { |
f6cfb427 | 925 | iterate_over_inferiors (gdbsim_interrupt_inferior, NULL); |
c906108c SS |
926 | } |
927 | ||
928 | /* GDB version of os_poll_quit callback. | |
8a0ce09a | 929 | Taken from gdb/util.c - should be in a library. */ |
c906108c SS |
930 | |
931 | static int | |
fba45db2 | 932 | gdb_os_poll_quit (host_callback *p) |
c906108c | 933 | { |
98bbd631 AC |
934 | if (deprecated_ui_loop_hook != NULL) |
935 | deprecated_ui_loop_hook (0); | |
7a292a7a | 936 | |
522002f9 | 937 | if (check_quit_flag ()) /* gdb's idea of quit */ |
abf009ef | 938 | return 1; |
c906108c SS |
939 | return 0; |
940 | } | |
941 | ||
942 | /* Wait for inferior process to do something. Return pid of child, | |
943 | or -1 in case of error; store status through argument pointer STATUS, | |
0df8b418 | 944 | just as `wait' would. */ |
c906108c SS |
945 | |
946 | static void | |
fba45db2 | 947 | gdbsim_cntrl_c (int signo) |
c906108c | 948 | { |
f6cfb427 | 949 | gdbsim_interrupt (NULL); |
c906108c SS |
950 | } |
951 | ||
39f77062 | 952 | static ptid_t |
117de6a9 | 953 | gdbsim_wait (struct target_ops *ops, |
47608cb1 | 954 | ptid_t ptid, struct target_waitstatus *status, int options) |
c906108c | 955 | { |
db04efe6 | 956 | struct sim_inferior_data *sim_data; |
a40805d4 | 957 | static sighandler_t prev_sigint; |
c906108c SS |
958 | int sigrc = 0; |
959 | enum sim_stop reason = sim_running; | |
960 | ||
db04efe6 KB |
961 | /* This target isn't able to (yet) resume more than one inferior at a time. |
962 | When ptid is minus_one_ptid, just use the current inferior. If we're | |
963 | given an explicit pid, we'll try to find it and use that instead. */ | |
964 | if (ptid_equal (ptid, minus_one_ptid)) | |
0df8b418 MS |
965 | sim_data = get_sim_inferior_data (current_inferior (), |
966 | SIM_INSTANCE_NEEDED); | |
db04efe6 KB |
967 | else |
968 | { | |
969 | sim_data = get_sim_inferior_data_by_ptid (ptid, SIM_INSTANCE_NEEDED); | |
970 | if (sim_data == NULL) | |
971 | error (_("Unable to wait for pid %d. Inferior not found."), | |
972 | ptid_get_pid (ptid)); | |
973 | inferior_ptid = ptid; | |
974 | } | |
975 | ||
ea35711c | 976 | if (remote_debug) |
1385f66c | 977 | fprintf_unfiltered (gdb_stdlog, "gdbsim_wait\n"); |
c906108c SS |
978 | |
979 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) | |
980 | { | |
981 | struct sigaction sa, osa; | |
982 | sa.sa_handler = gdbsim_cntrl_c; | |
983 | sigemptyset (&sa.sa_mask); | |
984 | sa.sa_flags = 0; | |
985 | sigaction (SIGINT, &sa, &osa); | |
986 | prev_sigint = osa.sa_handler; | |
987 | } | |
988 | #else | |
989 | prev_sigint = signal (SIGINT, gdbsim_cntrl_c); | |
990 | #endif | |
db04efe6 | 991 | sim_resume (sim_data->gdbsim_desc, sim_data->resume_step, |
74228e77 | 992 | sim_data->resume_siggnal); |
db04efe6 | 993 | |
c906108c | 994 | signal (SIGINT, prev_sigint); |
db04efe6 | 995 | sim_data->resume_step = 0; |
c906108c | 996 | |
db04efe6 | 997 | sim_stop_reason (sim_data->gdbsim_desc, &reason, &sigrc); |
c906108c SS |
998 | |
999 | switch (reason) | |
1000 | { | |
1001 | case sim_exited: | |
1002 | status->kind = TARGET_WAITKIND_EXITED; | |
1003 | status->value.integer = sigrc; | |
1004 | break; | |
1005 | case sim_stopped: | |
1006 | switch (sigrc) | |
1007 | { | |
a493e3e2 | 1008 | case GDB_SIGNAL_ABRT: |
c906108c SS |
1009 | quit (); |
1010 | break; | |
a493e3e2 PA |
1011 | case GDB_SIGNAL_INT: |
1012 | case GDB_SIGNAL_TRAP: | |
c906108c SS |
1013 | default: |
1014 | status->kind = TARGET_WAITKIND_STOPPED; | |
653090d3 | 1015 | status->value.sig = (enum gdb_signal) sigrc; |
c906108c SS |
1016 | break; |
1017 | } | |
1018 | break; | |
1019 | case sim_signalled: | |
1020 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
653090d3 | 1021 | status->value.sig = (enum gdb_signal) sigrc; |
c906108c SS |
1022 | break; |
1023 | case sim_running: | |
1024 | case sim_polling: | |
0df8b418 | 1025 | /* FIXME: Is this correct? */ |
c906108c SS |
1026 | break; |
1027 | } | |
1028 | ||
39f77062 | 1029 | return inferior_ptid; |
c906108c SS |
1030 | } |
1031 | ||
1032 | /* Get ready to modify the registers array. On machines which store | |
1033 | individual registers, this doesn't need to do anything. On machines | |
1034 | which store all the registers in one fell swoop, this makes sure | |
1035 | that registers contains all the registers from the program being | |
1036 | debugged. */ | |
1037 | ||
1038 | static void | |
f32dbf8c | 1039 | gdbsim_prepare_to_store (struct target_ops *self, struct regcache *regcache) |
c906108c | 1040 | { |
0df8b418 | 1041 | /* Do nothing, since we can store individual regs. */ |
c906108c SS |
1042 | } |
1043 | ||
146ec4db PA |
1044 | /* Helper for gdbsim_xfer_partial that handles memory transfers. |
1045 | Arguments are like target_xfer_partial. */ | |
d93bce06 | 1046 | |
9b409511 | 1047 | static enum target_xfer_status |
146ec4db PA |
1048 | gdbsim_xfer_memory (struct target_ops *target, |
1049 | gdb_byte *readbuf, const gdb_byte *writebuf, | |
9b409511 | 1050 | ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) |
c906108c | 1051 | { |
db04efe6 KB |
1052 | struct sim_inferior_data *sim_data |
1053 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
b55e14c7 | 1054 | int l; |
db04efe6 | 1055 | |
0c012db1 KB |
1056 | /* If this target doesn't have memory yet, return 0 causing the |
1057 | request to be passed to a lower target, hopefully an exec | |
1058 | file. */ | |
1059 | if (!target->to_has_memory (target)) | |
9b409511 | 1060 | return TARGET_XFER_EOF; |
52bb452f | 1061 | |
db04efe6 | 1062 | if (!sim_data->program_loaded) |
8a3fe4f8 | 1063 | error (_("No program loaded.")); |
c906108c | 1064 | |
db04efe6 KB |
1065 | /* Note that we obtained the sim_data pointer above using |
1066 | SIM_INSTANCE_NOT_NEEDED. We do this so that we don't needlessly | |
1067 | allocate a sim instance prior to loading a program. If we | |
1068 | get to this point in the code though, gdbsim_desc should be | |
1069 | non-NULL. (Note that a sim instance is needed in order to load | |
1070 | the program...) */ | |
1071 | gdb_assert (sim_data->gdbsim_desc != NULL); | |
1072 | ||
ea35711c | 1073 | if (remote_debug) |
fcde0081 | 1074 | fprintf_unfiltered (gdb_stdlog, |
146ec4db PA |
1075 | "gdbsim_xfer_memory: readbuf %s, writebuf %s, " |
1076 | "memaddr %s, len %s\n", | |
1077 | host_address_to_string (readbuf), | |
1078 | host_address_to_string (writebuf), | |
fcde0081 | 1079 | paddress (target_gdbarch (), memaddr), |
b55e14c7 | 1080 | pulongest (len)); |
c906108c | 1081 | |
146ec4db | 1082 | if (writebuf) |
c906108c | 1083 | { |
fcde0081 | 1084 | if (remote_debug && len > 0) |
146ec4db | 1085 | dump_mem (writebuf, len); |
b55e14c7 | 1086 | l = sim_write (sim_data->gdbsim_desc, memaddr, writebuf, len); |
c906108c | 1087 | } |
c5aa993b | 1088 | else |
c906108c | 1089 | { |
b55e14c7 | 1090 | l = sim_read (sim_data->gdbsim_desc, memaddr, readbuf, len); |
ea35711c | 1091 | if (remote_debug && len > 0) |
146ec4db | 1092 | dump_mem (readbuf, len); |
c5aa993b | 1093 | } |
9b409511 YQ |
1094 | if (l > 0) |
1095 | { | |
1096 | *xfered_len = (ULONGEST) l; | |
1097 | return TARGET_XFER_OK; | |
1098 | } | |
1099 | else if (l == 0) | |
1100 | return TARGET_XFER_EOF; | |
1101 | else | |
1102 | return TARGET_XFER_E_IO; | |
c906108c SS |
1103 | } |
1104 | ||
146ec4db PA |
1105 | /* Target to_xfer_partial implementation. */ |
1106 | ||
9b409511 | 1107 | static enum target_xfer_status |
146ec4db PA |
1108 | gdbsim_xfer_partial (struct target_ops *ops, enum target_object object, |
1109 | const char *annex, gdb_byte *readbuf, | |
9b409511 YQ |
1110 | const gdb_byte *writebuf, ULONGEST offset, ULONGEST len, |
1111 | ULONGEST *xfered_len) | |
146ec4db PA |
1112 | { |
1113 | switch (object) | |
1114 | { | |
1115 | case TARGET_OBJECT_MEMORY: | |
9b409511 YQ |
1116 | return gdbsim_xfer_memory (ops, readbuf, writebuf, offset, len, |
1117 | xfered_len); | |
146ec4db PA |
1118 | |
1119 | default: | |
2ed4b548 | 1120 | return TARGET_XFER_E_IO; |
146ec4db PA |
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) |
1385f66c | 1135 | fprintf_unfiltered (gdb_stdlog, "gdbsim_files_info: file \"%s\"\n", file); |
c906108c SS |
1136 | |
1137 | if (exec_bfd) | |
1138 | { | |
1385f66c PA |
1139 | fprintf_unfiltered (gdb_stdlog, "\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) |
1385f66c | 1154 | fprintf_unfiltered (gdb_stdlog, "gdbsim_mourn_inferior:\n"); |
c906108c SS |
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 | |
0b39b52e | 1165 | simulator_command (const 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 | ||
653090d3 SM |
1179 | sim_data = ((struct sim_inferior_data *) |
1180 | inferior_data (current_inferior (), sim_inferior_data_key)); | |
db04efe6 | 1181 | if (sim_data == NULL || sim_data->gdbsim_desc == NULL) |
c906108c SS |
1182 | { |
1183 | ||
1184 | /* PREVIOUSLY: The user may give a command before the simulator | |
74228e77 RM |
1185 | is opened. [...] (??? assuming of course one wishes to |
1186 | continue to allow commands to be sent to unopened simulators, | |
1187 | which isn't entirely unreasonable). */ | |
c906108c SS |
1188 | |
1189 | /* The simulator is a builtin abstraction of a remote target. | |
74228e77 RM |
1190 | Consistent with that model, access to the simulator, via sim |
1191 | commands, is restricted to the period when the channel to the | |
1192 | simulator is open. */ | |
c906108c | 1193 | |
8a3fe4f8 | 1194 | error (_("Not connected to the simulator target")); |
c906108c SS |
1195 | } |
1196 | ||
db04efe6 | 1197 | sim_do_command (sim_data->gdbsim_desc, args); |
c906108c SS |
1198 | |
1199 | /* Invalidate the register cache, in case the simulator command does | |
0df8b418 | 1200 | something funny. */ |
c5aa993b | 1201 | registers_changed (); |
c906108c SS |
1202 | } |
1203 | ||
386535dd PA |
1204 | static void |
1205 | sim_command_completer (struct cmd_list_element *ignore, | |
1206 | completion_tracker &tracker, | |
1207 | const char *text, const char *word) | |
56a9aa1d MF |
1208 | { |
1209 | struct sim_inferior_data *sim_data; | |
1210 | ||
653090d3 SM |
1211 | sim_data = ((struct sim_inferior_data *) |
1212 | inferior_data (current_inferior (), sim_inferior_data_key)); | |
56a9aa1d | 1213 | if (sim_data == NULL || sim_data->gdbsim_desc == NULL) |
386535dd | 1214 | return; |
56a9aa1d | 1215 | |
386535dd PA |
1216 | /* sim_complete_command returns a NULL-terminated malloc'ed array of |
1217 | malloc'ed strings. */ | |
1218 | struct sim_completions_deleter | |
1219 | { | |
1220 | void operator() (char **ptr) const | |
1221 | { | |
1222 | for (size_t i = 0; ptr[i] != NULL; i++) | |
1223 | xfree (ptr[i]); | |
1224 | xfree (ptr); | |
1225 | } | |
1226 | }; | |
1227 | ||
1228 | std::unique_ptr<char *[], sim_completions_deleter> sim_completions | |
1229 | (sim_complete_command (sim_data->gdbsim_desc, text, word)); | |
1230 | if (sim_completions == NULL) | |
1231 | return; | |
34370865 | 1232 | |
386535dd PA |
1233 | /* Count the elements and add completions from tail to head because |
1234 | below we'll swap elements out of the array in case add_completion | |
1235 | throws and the deleter deletes until it finds a NULL element. */ | |
1236 | size_t count = 0; | |
1237 | while (sim_completions[count] != NULL) | |
1238 | count++; | |
34370865 | 1239 | |
386535dd PA |
1240 | for (size_t i = count; i > 0; i--) |
1241 | { | |
1242 | gdb::unique_xmalloc_ptr<char> match (sim_completions[i - 1]); | |
1243 | sim_completions[i - 1] = NULL; | |
1244 | tracker.add_completion (std::move (match)); | |
1245 | } | |
56a9aa1d MF |
1246 | } |
1247 | ||
9de2bdd7 PA |
1248 | /* Check to see if a thread is still alive. */ |
1249 | ||
1250 | static int | |
28439f5e | 1251 | gdbsim_thread_alive (struct target_ops *ops, ptid_t ptid) |
9de2bdd7 | 1252 | { |
db04efe6 KB |
1253 | struct sim_inferior_data *sim_data |
1254 | = get_sim_inferior_data_by_ptid (ptid, SIM_INSTANCE_NOT_NEEDED); | |
1255 | ||
1256 | if (sim_data == NULL) | |
1257 | return 0; | |
1258 | ||
1259 | if (ptid_equal (ptid, sim_data->remote_sim_ptid)) | |
9de2bdd7 PA |
1260 | /* The simulators' task is always alive. */ |
1261 | return 1; | |
1262 | ||
1263 | return 0; | |
1264 | } | |
1265 | ||
1266 | /* Convert a thread ID to a string. Returns the string in a static | |
1267 | buffer. */ | |
1268 | ||
7a114964 | 1269 | static const char * |
117de6a9 | 1270 | gdbsim_pid_to_str (struct target_ops *ops, ptid_t ptid) |
9de2bdd7 | 1271 | { |
9de2bdd7 PA |
1272 | return normal_pid_to_str (ptid); |
1273 | } | |
1274 | ||
0c012db1 KB |
1275 | /* Simulator memory may be accessed after the program has been loaded. */ |
1276 | ||
b261e0c5 | 1277 | static int |
0c012db1 KB |
1278 | gdbsim_has_all_memory (struct target_ops *ops) |
1279 | { | |
1280 | struct sim_inferior_data *sim_data | |
1281 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
1282 | ||
1283 | if (!sim_data->program_loaded) | |
1284 | return 0; | |
1285 | ||
1286 | return 1; | |
1287 | } | |
1288 | ||
b261e0c5 | 1289 | static int |
0c012db1 KB |
1290 | gdbsim_has_memory (struct target_ops *ops) |
1291 | { | |
1292 | struct sim_inferior_data *sim_data | |
1293 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
1294 | ||
1295 | if (!sim_data->program_loaded) | |
1296 | return 0; | |
1297 | ||
1298 | return 1; | |
1299 | } | |
1300 | ||
0df8b418 | 1301 | /* Define the target subroutine names. */ |
c906108c | 1302 | |
c5aa993b JM |
1303 | struct target_ops gdbsim_ops; |
1304 | ||
1305 | static void | |
1306 | init_gdbsim_ops (void) | |
1307 | { | |
1308 | gdbsim_ops.to_shortname = "sim"; | |
1309 | gdbsim_ops.to_longname = "simulator"; | |
1310 | gdbsim_ops.to_doc = "Use the compiled-in simulator."; | |
1311 | gdbsim_ops.to_open = gdbsim_open; | |
1312 | gdbsim_ops.to_close = gdbsim_close; | |
c5aa993b | 1313 | gdbsim_ops.to_detach = gdbsim_detach; |
c5aa993b JM |
1314 | gdbsim_ops.to_resume = gdbsim_resume; |
1315 | gdbsim_ops.to_wait = gdbsim_wait; | |
c5aa993b JM |
1316 | gdbsim_ops.to_fetch_registers = gdbsim_fetch_register; |
1317 | gdbsim_ops.to_store_registers = gdbsim_store_register; | |
1318 | gdbsim_ops.to_prepare_to_store = gdbsim_prepare_to_store; | |
146ec4db | 1319 | gdbsim_ops.to_xfer_partial = gdbsim_xfer_partial; |
c5aa993b | 1320 | gdbsim_ops.to_files_info = gdbsim_files_info; |
8181d85f DJ |
1321 | gdbsim_ops.to_insert_breakpoint = memory_insert_breakpoint; |
1322 | gdbsim_ops.to_remove_breakpoint = memory_remove_breakpoint; | |
c5aa993b JM |
1323 | gdbsim_ops.to_kill = gdbsim_kill; |
1324 | gdbsim_ops.to_load = gdbsim_load; | |
c5aa993b | 1325 | gdbsim_ops.to_create_inferior = gdbsim_create_inferior; |
c5aa993b | 1326 | gdbsim_ops.to_mourn_inferior = gdbsim_mourn_inferior; |
bfedc46a | 1327 | gdbsim_ops.to_interrupt = gdbsim_interrupt; |
9de2bdd7 PA |
1328 | gdbsim_ops.to_thread_alive = gdbsim_thread_alive; |
1329 | gdbsim_ops.to_pid_to_str = gdbsim_pid_to_str; | |
c5aa993b | 1330 | gdbsim_ops.to_stratum = process_stratum; |
0c012db1 KB |
1331 | gdbsim_ops.to_has_all_memory = gdbsim_has_all_memory; |
1332 | gdbsim_ops.to_has_memory = gdbsim_has_memory; | |
c35b1492 PA |
1333 | gdbsim_ops.to_has_stack = default_child_has_stack; |
1334 | gdbsim_ops.to_has_registers = default_child_has_registers; | |
1335 | gdbsim_ops.to_has_execution = default_child_has_execution; | |
c5aa993b | 1336 | gdbsim_ops.to_magic = OPS_MAGIC; |
c906108c SS |
1337 | } |
1338 | ||
1339 | void | |
fba45db2 | 1340 | _initialize_remote_sim (void) |
c906108c | 1341 | { |
56a9aa1d MF |
1342 | struct cmd_list_element *c; |
1343 | ||
c5aa993b | 1344 | init_gdbsim_ops (); |
c906108c SS |
1345 | add_target (&gdbsim_ops); |
1346 | ||
56a9aa1d MF |
1347 | c = add_com ("sim", class_obscure, simulator_command, |
1348 | _("Send a command to the simulator.")); | |
1349 | set_cmd_completer (c, sim_command_completer); | |
9de2bdd7 | 1350 | |
db04efe6 | 1351 | sim_inferior_data_key |
c5d9b215 | 1352 | = register_inferior_data_with_cleanup (NULL, sim_inferior_data_cleanup); |
c906108c | 1353 | } |