Commit | Line | Data |
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c906108c | 1 | /* Generic remote debugging interface for simulators. |
0a65a603 | 2 | |
42a4f53d | 3 | Copyright (C) 1993-2019 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" | |
3b3dac9b | 34 | #include "process-stratum-target.h" |
c906108c | 35 | #include "gdbcore.h" |
3c25f8c7 AC |
36 | #include "gdb/callback.h" |
37 | #include "gdb/remote-sim.h" | |
c906108c | 38 | #include "command.h" |
4e052eda | 39 | #include "regcache.h" |
8238d0bf | 40 | #include "sim-regno.h" |
a8cf2722 | 41 | #include "arch-utils.h" |
1986bccd | 42 | #include "readline/readline.h" |
9de2bdd7 | 43 | #include "gdbthread.h" |
268a13a5 | 44 | #include "gdbsupport/byte-vector.h" |
c906108c SS |
45 | |
46 | /* Prototypes */ | |
47 | ||
a14ed312 | 48 | static void init_callbacks (void); |
c906108c | 49 | |
a14ed312 | 50 | static void end_callbacks (void); |
c906108c | 51 | |
a14ed312 | 52 | static int gdb_os_write_stdout (host_callback *, const char *, int); |
c906108c | 53 | |
a14ed312 | 54 | static void gdb_os_flush_stdout (host_callback *); |
c906108c | 55 | |
a14ed312 | 56 | static int gdb_os_write_stderr (host_callback *, const char *, int); |
c906108c | 57 | |
a14ed312 | 58 | static void gdb_os_flush_stderr (host_callback *); |
c906108c | 59 | |
a14ed312 | 60 | static int gdb_os_poll_quit (host_callback *); |
c906108c | 61 | |
0df8b418 | 62 | /* printf_filtered is depreciated. */ |
a14ed312 | 63 | static void gdb_os_printf_filtered (host_callback *, const char *, ...); |
c906108c | 64 | |
a14ed312 | 65 | static void gdb_os_vprintf_filtered (host_callback *, const char *, va_list); |
c906108c | 66 | |
a14ed312 | 67 | static void gdb_os_evprintf_filtered (host_callback *, const char *, va_list); |
c906108c | 68 | |
c25c4a8b JK |
69 | static void gdb_os_error (host_callback *, const char *, ...) |
70 | ATTRIBUTE_NORETURN; | |
c906108c | 71 | |
f6ac5f3d | 72 | void simulator_command (char *args, int from_tty); |
c906108c | 73 | |
f6ac5f3d | 74 | /* Naming convention: |
c906108c | 75 | |
f6ac5f3d PA |
76 | sim_* are the interface to the simulator (see remote-sim.h). |
77 | gdbsim_* are stuff which is internal to gdb. */ | |
c906108c | 78 | |
d9f719f1 PA |
79 | static const target_info gdbsim_target_info = { |
80 | "sim", | |
81 | N_("simulator"), | |
82 | N_("Use the compiled-in simulator.") | |
83 | }; | |
84 | ||
f6ac5f3d | 85 | struct gdbsim_target final |
3b3dac9b | 86 | : public memory_breakpoint_target<process_stratum_target> |
f6ac5f3d | 87 | { |
3b3dac9b | 88 | gdbsim_target () = default; |
c906108c | 89 | |
d9f719f1 PA |
90 | const target_info &info () const override |
91 | { return gdbsim_target_info; } | |
c906108c | 92 | |
f6ac5f3d | 93 | void close () override; |
c906108c | 94 | |
f6ac5f3d | 95 | void detach (inferior *inf, int) override; |
c906108c | 96 | |
f6ac5f3d PA |
97 | void resume (ptid_t, int, enum gdb_signal) override; |
98 | ptid_t wait (ptid_t, struct target_waitstatus *, int) override; | |
c906108c | 99 | |
f6ac5f3d PA |
100 | void fetch_registers (struct regcache *, int) override; |
101 | void store_registers (struct regcache *, int) override; | |
102 | void prepare_to_store (struct regcache *) override; | |
c906108c | 103 | |
f6ac5f3d PA |
104 | enum target_xfer_status xfer_partial (enum target_object object, |
105 | const char *annex, | |
106 | gdb_byte *readbuf, | |
107 | const gdb_byte *writebuf, | |
108 | ULONGEST offset, ULONGEST len, | |
109 | ULONGEST *xfered_len) override; | |
110 | ||
111 | void files_info () override; | |
112 | ||
113 | void kill () override; | |
114 | ||
115 | void load (const char *, int) override; | |
116 | ||
117 | bool can_create_inferior () override { return true; } | |
118 | void create_inferior (const char *, const std::string &, | |
119 | char **, int) override; | |
120 | ||
121 | void mourn_inferior () override; | |
122 | ||
123 | void interrupt () override; | |
124 | ||
57810aa7 | 125 | bool thread_alive (ptid_t ptid) override; |
c906108c | 126 | |
a068643d | 127 | std::string pid_to_str (ptid_t) override; |
f6ac5f3d | 128 | |
57810aa7 PA |
129 | bool has_all_memory () override; |
130 | bool has_memory () override; | |
f6ac5f3d PA |
131 | }; |
132 | ||
133 | static struct gdbsim_target gdbsim_ops; | |
c906108c | 134 | |
18101a35 TT |
135 | /* Value of the next pid to allocate for an inferior. As indicated |
136 | elsewhere, its initial value is somewhat arbitrary; it's critical | |
137 | though that it's not zero or negative. */ | |
138 | static int next_pid; | |
139 | #define INITIAL_PID 42000 | |
db04efe6 KB |
140 | |
141 | /* Simulator-specific, per-inferior state. */ | |
142 | struct sim_inferior_data { | |
18101a35 TT |
143 | explicit sim_inferior_data (SIM_DESC desc) |
144 | : gdbsim_desc (desc), | |
145 | remote_sim_ptid (next_pid, 0, next_pid) | |
146 | { | |
147 | ++next_pid; | |
148 | } | |
149 | ||
150 | ~sim_inferior_data (); | |
151 | ||
db04efe6 | 152 | /* Flag which indicates whether or not the program has been loaded. */ |
18101a35 | 153 | int program_loaded = 0; |
db04efe6 KB |
154 | |
155 | /* Simulator descriptor for this inferior. */ | |
156 | SIM_DESC gdbsim_desc; | |
157 | ||
158 | /* This is the ptid we use for this particular simulator instance. Its | |
159 | value is somewhat arbitrary, as the simulator target don't have a | |
160 | notion of tasks or threads, but we need something non-null to place | |
161 | in inferior_ptid. For simulators which permit multiple instances, | |
162 | we also need a unique identifier to use for each inferior. */ | |
163 | ptid_t remote_sim_ptid; | |
164 | ||
165 | /* Signal with which to resume. */ | |
18101a35 | 166 | enum gdb_signal resume_siggnal = GDB_SIGNAL_0; |
db04efe6 KB |
167 | |
168 | /* Flag which indicates whether resume should step or not. */ | |
18101a35 | 169 | int resume_step = 0; |
db04efe6 KB |
170 | }; |
171 | ||
18101a35 TT |
172 | static inferior_key<sim_inferior_data> sim_inferior_data_key; |
173 | ||
db04efe6 KB |
174 | /* Flag indicating the "open" status of this module. It's set to 1 |
175 | in gdbsim_open() and 0 in gdbsim_close(). */ | |
176 | static int gdbsim_is_open = 0; | |
177 | ||
db04efe6 KB |
178 | /* Argument list to pass to sim_open(). It is allocated in gdbsim_open() |
179 | and deallocated in gdbsim_close(). The lifetime needs to extend beyond | |
180 | the call to gdbsim_open() due to the fact that other sim instances other | |
181 | than the first will be allocated after the gdbsim_open() call. */ | |
182 | static char **sim_argv = NULL; | |
183 | ||
184 | /* OS-level callback functions for write, flush, etc. */ | |
185 | static host_callback gdb_callback; | |
186 | static int callbacks_initialized = 0; | |
187 | ||
188 | /* Callback for iterate_over_inferiors. It checks to see if the sim | |
189 | descriptor passed via ARG is the same as that for the inferior | |
190 | designated by INF. Return true if so; false otherwise. */ | |
191 | ||
192 | static int | |
193 | check_for_duplicate_sim_descriptor (struct inferior *inf, void *arg) | |
194 | { | |
195 | struct sim_inferior_data *sim_data; | |
653090d3 | 196 | SIM_DESC new_sim_desc = (SIM_DESC) arg; |
db04efe6 | 197 | |
18101a35 | 198 | sim_data = sim_inferior_data_key.get (inf); |
db04efe6 KB |
199 | |
200 | return (sim_data != NULL && sim_data->gdbsim_desc == new_sim_desc); | |
201 | } | |
202 | ||
203 | /* Flags indicating whether or not a sim instance is needed. One of these | |
204 | flags should be passed to get_sim_inferior_data(). */ | |
205 | ||
206 | enum {SIM_INSTANCE_NOT_NEEDED = 0, SIM_INSTANCE_NEEDED = 1}; | |
207 | ||
208 | /* Obtain pointer to per-inferior simulator data, allocating it if necessary. | |
209 | Attempt to open the sim if SIM_INSTANCE_NEEDED is true. */ | |
210 | ||
211 | static struct sim_inferior_data * | |
212 | get_sim_inferior_data (struct inferior *inf, int sim_instance_needed) | |
213 | { | |
214 | SIM_DESC sim_desc = NULL; | |
18101a35 | 215 | struct sim_inferior_data *sim_data = sim_inferior_data_key.get (inf); |
db04efe6 KB |
216 | |
217 | /* Try to allocate a new sim instance, if needed. We do this ahead of | |
218 | a potential allocation of a sim_inferior_data struct in order to | |
219 | avoid needlessly allocating that struct in the event that the sim | |
220 | instance allocation fails. */ | |
74228e77 | 221 | if (sim_instance_needed == SIM_INSTANCE_NEEDED |
db04efe6 KB |
222 | && (sim_data == NULL || sim_data->gdbsim_desc == NULL)) |
223 | { | |
224 | struct inferior *idup; | |
225 | sim_desc = sim_open (SIM_OPEN_DEBUG, &gdb_callback, exec_bfd, sim_argv); | |
226 | if (sim_desc == NULL) | |
227 | error (_("Unable to create simulator instance for inferior %d."), | |
228 | inf->num); | |
229 | ||
230 | idup = iterate_over_inferiors (check_for_duplicate_sim_descriptor, | |
74228e77 | 231 | sim_desc); |
db04efe6 KB |
232 | if (idup != NULL) |
233 | { | |
234 | /* We don't close the descriptor due to the fact that it's | |
235 | shared with some other inferior. If we were to close it, | |
236 | that might needlessly muck up the other inferior. Of | |
237 | course, it's possible that the damage has already been | |
238 | done... Note that it *will* ultimately be closed during | |
239 | cleanup of the other inferior. */ | |
240 | sim_desc = NULL; | |
241 | error ( | |
242 | _("Inferior %d and inferior %d would have identical simulator state.\n" | |
243 | "(This simulator does not support the running of more than one inferior.)"), | |
74228e77 RM |
244 | inf->num, idup->num); |
245 | } | |
db04efe6 KB |
246 | } |
247 | ||
248 | if (sim_data == NULL) | |
249 | { | |
18101a35 | 250 | sim_data = sim_inferior_data_key.emplace (inf, sim_desc); |
db04efe6 KB |
251 | } |
252 | else if (sim_desc) | |
253 | { | |
254 | /* This handles the case where sim_data was allocated prior to | |
74228e77 | 255 | needing a sim instance. */ |
db04efe6 KB |
256 | sim_data->gdbsim_desc = sim_desc; |
257 | } | |
c906108c | 258 | |
c906108c | 259 | |
db04efe6 KB |
260 | return sim_data; |
261 | } | |
262 | ||
263 | /* Return pointer to per-inferior simulator data using PTID to find the | |
264 | inferior in question. Return NULL when no inferior is found or | |
265 | when ptid has a zero or negative pid component. */ | |
266 | ||
267 | static struct sim_inferior_data * | |
268 | get_sim_inferior_data_by_ptid (ptid_t ptid, int sim_instance_needed) | |
269 | { | |
270 | struct inferior *inf; | |
e99b03dc | 271 | int pid = ptid.pid (); |
db04efe6 KB |
272 | |
273 | if (pid <= 0) | |
274 | return NULL; | |
74228e77 | 275 | |
db04efe6 KB |
276 | inf = find_inferior_pid (pid); |
277 | ||
278 | if (inf) | |
279 | return get_sim_inferior_data (inf, sim_instance_needed); | |
280 | else | |
281 | return NULL; | |
282 | } | |
283 | ||
284 | /* Free the per-inferior simulator data. */ | |
285 | ||
18101a35 | 286 | sim_inferior_data::~sim_inferior_data () |
db04efe6 | 287 | { |
18101a35 TT |
288 | if (gdbsim_desc) |
289 | sim_close (gdbsim_desc, 0); | |
db04efe6 | 290 | } |
9de2bdd7 | 291 | |
c906108c | 292 | static void |
146ec4db | 293 | dump_mem (const gdb_byte *buf, int len) |
c906108c | 294 | { |
1385f66c | 295 | fputs_unfiltered ("\t", gdb_stdlog); |
3d468296 AB |
296 | |
297 | if (len == 8 || len == 4) | |
c906108c | 298 | { |
3d468296 | 299 | uint32_t l[2]; |
123f5f96 | 300 | |
3d468296 | 301 | memcpy (l, buf, len); |
1385f66c | 302 | fprintf_unfiltered (gdb_stdlog, "0x%08x", l[0]); |
3d468296 | 303 | if (len == 8) |
1385f66c | 304 | fprintf_unfiltered (gdb_stdlog, " 0x%08x", l[1]); |
3d468296 AB |
305 | } |
306 | else | |
307 | { | |
308 | int i; | |
123f5f96 | 309 | |
3d468296 | 310 | for (i = 0; i < len; i++) |
1385f66c | 311 | fprintf_unfiltered (gdb_stdlog, "0x%02x ", buf[i]); |
c906108c | 312 | } |
3d468296 | 313 | |
1385f66c | 314 | fputs_unfiltered ("\n", gdb_stdlog); |
c906108c SS |
315 | } |
316 | ||
c906108c SS |
317 | /* Initialize gdb_callback. */ |
318 | ||
319 | static void | |
fba45db2 | 320 | init_callbacks (void) |
c906108c | 321 | { |
c5aa993b | 322 | if (!callbacks_initialized) |
c906108c SS |
323 | { |
324 | gdb_callback = default_callback; | |
325 | gdb_callback.init (&gdb_callback); | |
326 | gdb_callback.write_stdout = gdb_os_write_stdout; | |
327 | gdb_callback.flush_stdout = gdb_os_flush_stdout; | |
328 | gdb_callback.write_stderr = gdb_os_write_stderr; | |
329 | gdb_callback.flush_stderr = gdb_os_flush_stderr; | |
330 | gdb_callback.printf_filtered = gdb_os_printf_filtered; | |
331 | gdb_callback.vprintf_filtered = gdb_os_vprintf_filtered; | |
332 | gdb_callback.evprintf_filtered = gdb_os_evprintf_filtered; | |
333 | gdb_callback.error = gdb_os_error; | |
334 | gdb_callback.poll_quit = gdb_os_poll_quit; | |
335 | gdb_callback.magic = HOST_CALLBACK_MAGIC; | |
336 | callbacks_initialized = 1; | |
337 | } | |
338 | } | |
339 | ||
340 | /* Release callbacks (free resources used by them). */ | |
341 | ||
342 | static void | |
fba45db2 | 343 | end_callbacks (void) |
c906108c SS |
344 | { |
345 | if (callbacks_initialized) | |
346 | { | |
347 | gdb_callback.shutdown (&gdb_callback); | |
348 | callbacks_initialized = 0; | |
349 | } | |
350 | } | |
351 | ||
352 | /* GDB version of os_write_stdout callback. */ | |
353 | ||
c5aa993b | 354 | static int |
fba45db2 | 355 | gdb_os_write_stdout (host_callback *p, const char *buf, int len) |
c906108c | 356 | { |
d9fcf2fb | 357 | ui_file_write (gdb_stdtarg, buf, len); |
c906108c SS |
358 | return len; |
359 | } | |
360 | ||
361 | /* GDB version of os_flush_stdout callback. */ | |
362 | ||
363 | static void | |
fba45db2 | 364 | gdb_os_flush_stdout (host_callback *p) |
c906108c | 365 | { |
4ce44c66 | 366 | gdb_flush (gdb_stdtarg); |
c906108c SS |
367 | } |
368 | ||
369 | /* GDB version of os_write_stderr callback. */ | |
370 | ||
c5aa993b | 371 | static int |
fba45db2 | 372 | gdb_os_write_stderr (host_callback *p, const char *buf, int len) |
c906108c SS |
373 | { |
374 | int i; | |
375 | char b[2]; | |
376 | ||
c5aa993b | 377 | for (i = 0; i < len; i++) |
c906108c SS |
378 | { |
379 | b[0] = buf[i]; | |
380 | b[1] = 0; | |
22e8e3c7 | 381 | fputs_unfiltered (b, gdb_stdtargerr); |
c906108c SS |
382 | } |
383 | return len; | |
384 | } | |
385 | ||
386 | /* GDB version of os_flush_stderr callback. */ | |
387 | ||
388 | static void | |
fba45db2 | 389 | gdb_os_flush_stderr (host_callback *p) |
c906108c | 390 | { |
22e8e3c7 | 391 | gdb_flush (gdb_stdtargerr); |
c906108c SS |
392 | } |
393 | ||
394 | /* GDB version of printf_filtered callback. */ | |
395 | ||
7104e59b SM |
396 | static void ATTRIBUTE_PRINTF (2, 3) |
397 | gdb_os_printf_filtered (host_callback * p, const char *format, ...) | |
c906108c SS |
398 | { |
399 | va_list args; | |
c906108c | 400 | |
123f5f96 | 401 | va_start (args, format); |
c906108c | 402 | vfprintf_filtered (gdb_stdout, format, args); |
c906108c SS |
403 | va_end (args); |
404 | } | |
405 | ||
406 | /* GDB version of error vprintf_filtered. */ | |
407 | ||
7104e59b | 408 | static void ATTRIBUTE_PRINTF (2, 0) |
c5aa993b | 409 | gdb_os_vprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c SS |
410 | { |
411 | vfprintf_filtered (gdb_stdout, format, ap); | |
412 | } | |
413 | ||
414 | /* GDB version of error evprintf_filtered. */ | |
415 | ||
7104e59b | 416 | static void ATTRIBUTE_PRINTF (2, 0) |
c5aa993b | 417 | gdb_os_evprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c SS |
418 | { |
419 | vfprintf_filtered (gdb_stderr, format, ap); | |
420 | } | |
421 | ||
422 | /* GDB version of error callback. */ | |
423 | ||
7104e59b | 424 | static void ATTRIBUTE_PRINTF (2, 3) |
58d4abe1 | 425 | gdb_os_error (host_callback * p, const char *format, ...) |
c906108c | 426 | { |
58d4abe1 | 427 | va_list args; |
123f5f96 | 428 | |
58d4abe1 PA |
429 | va_start (args, format); |
430 | verror (format, args); | |
431 | va_end (args); | |
c906108c SS |
432 | } |
433 | ||
8238d0bf | 434 | int |
e7faf938 | 435 | one2one_register_sim_regno (struct gdbarch *gdbarch, int regnum) |
8238d0bf AC |
436 | { |
437 | /* Only makes sense to supply raw registers. */ | |
e7faf938 | 438 | gdb_assert (regnum >= 0 && regnum < gdbarch_num_regs (gdbarch)); |
8238d0bf AC |
439 | return regnum; |
440 | } | |
441 | ||
f6ac5f3d PA |
442 | void |
443 | gdbsim_target::fetch_registers (struct regcache *regcache, int regno) | |
c906108c | 444 | { |
ac7936df | 445 | struct gdbarch *gdbarch = regcache->arch (); |
222312d3 | 446 | struct inferior *inf = find_inferior_ptid (regcache->ptid ()); |
db04efe6 | 447 | struct sim_inferior_data *sim_data |
bcc0c096 | 448 | = get_sim_inferior_data (inf, SIM_INSTANCE_NEEDED); |
123f5f96 | 449 | |
c5aa993b | 450 | if (regno == -1) |
c906108c | 451 | { |
40a6adc1 | 452 | for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++) |
f6ac5f3d | 453 | fetch_registers (regcache, regno); |
8238d0bf | 454 | return; |
c906108c | 455 | } |
8238d0bf | 456 | |
40a6adc1 | 457 | switch (gdbarch_register_sim_regno (gdbarch, regno)) |
c906108c | 458 | { |
8238d0bf AC |
459 | case LEGACY_SIM_REGNO_IGNORE: |
460 | break; | |
461 | case SIM_REGNO_DOES_NOT_EXIST: | |
462 | { | |
463 | /* For moment treat a `does not exist' register the same way | |
74228e77 | 464 | as an ``unavailable'' register. */ |
a4d1e79a | 465 | regcache->raw_supply_zeroed (regno); |
8238d0bf AC |
466 | break; |
467 | } | |
74228e77 | 468 | |
8238d0bf AC |
469 | default: |
470 | { | |
471 | static int warn_user = 1; | |
a4d1e79a AH |
472 | int regsize = register_size (gdbarch, regno); |
473 | gdb::byte_vector buf (regsize, 0); | |
8238d0bf | 474 | int nr_bytes; |
123f5f96 | 475 | |
40a6adc1 | 476 | gdb_assert (regno >= 0 && regno < gdbarch_num_regs (gdbarch)); |
db04efe6 | 477 | nr_bytes = sim_fetch_register (sim_data->gdbsim_desc, |
474c1661 | 478 | gdbarch_register_sim_regno |
40a6adc1 | 479 | (gdbarch, regno), |
a4d1e79a AH |
480 | buf.data (), regsize); |
481 | if (nr_bytes > 0 && nr_bytes != regsize && warn_user) | |
8238d0bf AC |
482 | { |
483 | fprintf_unfiltered (gdb_stderr, | |
0df8b418 MS |
484 | "Size of register %s (%d/%d) " |
485 | "incorrect (%d instead of %d))", | |
40a6adc1 | 486 | gdbarch_register_name (gdbarch, regno), |
474c1661 | 487 | regno, |
a4d1e79a AH |
488 | gdbarch_register_sim_regno (gdbarch, regno), |
489 | nr_bytes, regsize); | |
8238d0bf AC |
490 | warn_user = 0; |
491 | } | |
492 | /* FIXME: cagney/2002-05-27: Should check `nr_bytes == 0' | |
278a7cf7 | 493 | indicating that GDB and the SIM have different ideas about |
8238d0bf AC |
494 | which registers are fetchable. */ |
495 | /* Else if (nr_bytes < 0): an old simulator, that doesn't | |
496 | think to return the register size. Just assume all is ok. */ | |
a4d1e79a | 497 | regcache->raw_supply (regno, buf.data ()); |
ea35711c | 498 | if (remote_debug) |
8238d0bf | 499 | { |
1385f66c PA |
500 | fprintf_unfiltered (gdb_stdlog, |
501 | "gdbsim_fetch_register: %d", regno); | |
8238d0bf | 502 | /* FIXME: We could print something more intelligible. */ |
a4d1e79a | 503 | dump_mem (buf.data (), regsize); |
8238d0bf AC |
504 | } |
505 | break; | |
506 | } | |
c906108c SS |
507 | } |
508 | } | |
509 | ||
510 | ||
f6ac5f3d PA |
511 | void |
512 | gdbsim_target::store_registers (struct regcache *regcache, int regno) | |
c906108c | 513 | { |
ac7936df | 514 | struct gdbarch *gdbarch = regcache->arch (); |
222312d3 | 515 | struct inferior *inf = find_inferior_ptid (regcache->ptid ()); |
db04efe6 | 516 | struct sim_inferior_data *sim_data |
bcc0c096 | 517 | = get_sim_inferior_data (inf, SIM_INSTANCE_NEEDED); |
db04efe6 | 518 | |
c5aa993b | 519 | if (regno == -1) |
c906108c | 520 | { |
40a6adc1 | 521 | for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++) |
f6ac5f3d | 522 | store_registers (regcache, regno); |
8238d0bf | 523 | return; |
c906108c | 524 | } |
40a6adc1 | 525 | else if (gdbarch_register_sim_regno (gdbarch, regno) >= 0) |
c906108c | 526 | { |
a4d1e79a AH |
527 | int regsize = register_size (gdbarch, regno); |
528 | gdb::byte_vector tmp (regsize); | |
c906108c | 529 | int nr_bytes; |
123f5f96 | 530 | |
a4d1e79a | 531 | regcache->cooked_read (regno, tmp.data ()); |
db04efe6 | 532 | nr_bytes = sim_store_register (sim_data->gdbsim_desc, |
474c1661 | 533 | gdbarch_register_sim_regno |
40a6adc1 | 534 | (gdbarch, regno), |
a4d1e79a AH |
535 | tmp.data (), regsize); |
536 | ||
537 | if (nr_bytes > 0 && nr_bytes != regsize) | |
8e65ff28 | 538 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 539 | _("Register size different to expected")); |
dae477fe | 540 | if (nr_bytes < 0) |
74228e77 RM |
541 | internal_error (__FILE__, __LINE__, |
542 | _("Register %d not updated"), regno); | |
dae477fe | 543 | if (nr_bytes == 0) |
74228e77 RM |
544 | warning (_("Register %s not updated"), |
545 | gdbarch_register_name (gdbarch, regno)); | |
dae477fe | 546 | |
ea35711c | 547 | if (remote_debug) |
c906108c | 548 | { |
1385f66c | 549 | fprintf_unfiltered (gdb_stdlog, "gdbsim_store_register: %d", regno); |
c906108c | 550 | /* FIXME: We could print something more intelligible. */ |
a4d1e79a | 551 | dump_mem (tmp.data (), regsize); |
c906108c SS |
552 | } |
553 | } | |
554 | } | |
555 | ||
556 | /* Kill the running program. This may involve closing any open files | |
557 | and releasing other resources acquired by the simulated program. */ | |
558 | ||
f6ac5f3d PA |
559 | void |
560 | gdbsim_target::kill () | |
c906108c | 561 | { |
ea35711c | 562 | if (remote_debug) |
1385f66c | 563 | fprintf_unfiltered (gdb_stdlog, "gdbsim_kill\n"); |
c906108c SS |
564 | |
565 | /* There is no need to `kill' running simulator - the simulator is | |
52bb452f | 566 | not running. Mourning it is enough. */ |
bc1e6c81 | 567 | target_mourn_inferior (inferior_ptid); |
c906108c SS |
568 | } |
569 | ||
570 | /* Load an executable file into the target process. This is expected to | |
571 | not only bring new code into the target process, but also to update | |
572 | GDB's symbol tables to match. */ | |
573 | ||
f6ac5f3d PA |
574 | void |
575 | gdbsim_target::load (const char *args, int fromtty) | |
c906108c | 576 | { |
b2b255bd | 577 | const char *prog; |
db04efe6 KB |
578 | struct sim_inferior_data *sim_data |
579 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NEEDED); | |
1986bccd | 580 | |
d1a41061 PP |
581 | if (args == NULL) |
582 | error_no_arg (_("program to load")); | |
1986bccd | 583 | |
773a1edc | 584 | gdb_argv argv (args); |
1986bccd AS |
585 | |
586 | prog = tilde_expand (argv[0]); | |
587 | ||
588 | if (argv[1] != NULL) | |
589 | error (_("GDB sim does not yet support a load offset.")); | |
590 | ||
ea35711c | 591 | if (remote_debug) |
1385f66c | 592 | fprintf_unfiltered (gdb_stdlog, "gdbsim_load: prog \"%s\"\n", prog); |
c906108c | 593 | |
c906108c SS |
594 | /* FIXME: We will print two messages on error. |
595 | Need error to either not print anything if passed NULL or need | |
596 | another routine that doesn't take any arguments. */ | |
db04efe6 | 597 | if (sim_load (sim_data->gdbsim_desc, prog, NULL, fromtty) == SIM_RC_FAIL) |
8a3fe4f8 | 598 | error (_("unable to load program")); |
c906108c SS |
599 | |
600 | /* FIXME: If a load command should reset the targets registers then | |
0df8b418 | 601 | a call to sim_create_inferior() should go here. */ |
c906108c | 602 | |
db04efe6 | 603 | sim_data->program_loaded = 1; |
c906108c SS |
604 | } |
605 | ||
606 | ||
39f77062 | 607 | /* Start an inferior process and set inferior_ptid to its pid. |
c906108c SS |
608 | EXEC_FILE is the file to run. |
609 | ARGS is a string containing the arguments to the program. | |
610 | ENV is the environment vector to pass. Errors reported with error(). | |
611 | On VxWorks and various standalone systems, we ignore exec_file. */ | |
612 | /* This is called not only when we first attach, but also when the | |
613 | user types "run" after having attached. */ | |
614 | ||
f6ac5f3d PA |
615 | void |
616 | gdbsim_target::create_inferior (const char *exec_file, | |
617 | const std::string &allargs, | |
618 | char **env, int from_tty) | |
c906108c | 619 | { |
db04efe6 KB |
620 | struct sim_inferior_data *sim_data |
621 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NEEDED); | |
c906108c | 622 | int len; |
773a1edc | 623 | char *arg_buf; |
7c5ded6a | 624 | const char *args = allargs.c_str (); |
c906108c SS |
625 | |
626 | if (exec_file == 0 || exec_bfd == 0) | |
8a3fe4f8 | 627 | warning (_("No executable file specified.")); |
db04efe6 | 628 | if (!sim_data->program_loaded) |
8a3fe4f8 | 629 | warning (_("No program loaded.")); |
c906108c | 630 | |
ea35711c | 631 | if (remote_debug) |
1385f66c PA |
632 | fprintf_unfiltered (gdb_stdlog, |
633 | "gdbsim_create_inferior: exec_file \"%s\", args \"%s\"\n", | |
634 | (exec_file ? exec_file : "(NULL)"), | |
635 | args); | |
c906108c | 636 | |
d7e15655 | 637 | if (inferior_ptid == sim_data->remote_sim_ptid) |
f6ac5f3d | 638 | kill (); |
c906108c SS |
639 | remove_breakpoints (); |
640 | init_wait_for_inferior (); | |
641 | ||
773a1edc | 642 | gdb_argv built_argv; |
c906108c SS |
643 | if (exec_file != NULL) |
644 | { | |
7c5ded6a | 645 | len = strlen (exec_file) + 1 + allargs.size () + 1 + /*slop */ 10; |
c906108c SS |
646 | arg_buf = (char *) alloca (len); |
647 | arg_buf[0] = '\0'; | |
648 | strcat (arg_buf, exec_file); | |
649 | strcat (arg_buf, " "); | |
650 | strcat (arg_buf, args); | |
773a1edc | 651 | built_argv.reset (arg_buf); |
c906108c | 652 | } |
ddd60447 | 653 | |
773a1edc TT |
654 | if (sim_create_inferior (sim_data->gdbsim_desc, exec_bfd, |
655 | built_argv.get (), env) | |
ddd60447 MF |
656 | != SIM_RC_OK) |
657 | error (_("Unable to create sim inferior.")); | |
c906108c | 658 | |
db04efe6 | 659 | inferior_ptid = sim_data->remote_sim_ptid; |
e99b03dc | 660 | inferior_appeared (current_inferior (), inferior_ptid.pid ()); |
9de2bdd7 PA |
661 | add_thread_silent (inferior_ptid); |
662 | ||
0df8b418 MS |
663 | insert_breakpoints (); /* Needed to get correct instruction |
664 | in cache. */ | |
c906108c | 665 | |
88056fbb | 666 | clear_proceed_status (0); |
c906108c SS |
667 | } |
668 | ||
669 | /* The open routine takes the rest of the parameters from the command, | |
670 | and (if successful) pushes a new target onto the stack. | |
671 | Targets should supply this routine, if only to provide an error message. */ | |
0df8b418 | 672 | /* Called when selecting the simulator. E.g. (gdb) target sim name. */ |
c906108c | 673 | |
d9f719f1 PA |
674 | static void |
675 | gdbsim_target_open (const char *args, int from_tty) | |
c906108c SS |
676 | { |
677 | int len; | |
678 | char *arg_buf; | |
db04efe6 | 679 | struct sim_inferior_data *sim_data; |
87d1b309 | 680 | const char *sysroot; |
db04efe6 | 681 | SIM_DESC gdbsim_desc; |
c906108c | 682 | |
87d1b309 MF |
683 | sysroot = gdb_sysroot; |
684 | if (is_target_filename (sysroot)) | |
685 | sysroot += strlen (TARGET_SYSROOT_PREFIX); | |
686 | ||
ea35711c | 687 | if (remote_debug) |
1385f66c PA |
688 | fprintf_unfiltered (gdb_stdlog, |
689 | "gdbsim_open: args \"%s\"\n", args ? args : "(null)"); | |
c906108c | 690 | |
db04efe6 KB |
691 | /* Ensure that the sim target is not on the target stack. This is |
692 | necessary, because if it is on the target stack, the call to | |
693 | push_target below will invoke sim_close(), thus freeing various | |
694 | state (including a sim instance) that we allocate prior to | |
695 | invoking push_target(). We want to delay the push_target() | |
696 | operation until after we complete those operations which could | |
697 | error out. */ | |
698 | if (gdbsim_is_open) | |
c906108c SS |
699 | unpush_target (&gdbsim_ops); |
700 | ||
c5aa993b | 701 | len = (7 + 1 /* gdbsim */ |
c906108c SS |
702 | + strlen (" -E little") |
703 | + strlen (" --architecture=xxxxxxxxxx") | |
23bf70af | 704 | + strlen (" --sysroot=") + strlen (sysroot) + |
c906108c | 705 | + (args ? strlen (args) : 0) |
c5aa993b | 706 | + 50) /* slack */ ; |
c906108c | 707 | arg_buf = (char *) alloca (len); |
c5aa993b | 708 | strcpy (arg_buf, "gdbsim"); /* 7 */ |
b6d373df | 709 | /* Specify the byte order for the target when it is explicitly |
0df8b418 | 710 | specified by the user (not auto detected). */ |
b6d373df | 711 | switch (selected_byte_order ()) |
c906108c | 712 | { |
a8cf2722 AC |
713 | case BFD_ENDIAN_BIG: |
714 | strcat (arg_buf, " -E big"); | |
715 | break; | |
716 | case BFD_ENDIAN_LITTLE: | |
717 | strcat (arg_buf, " -E little"); | |
718 | break; | |
719 | case BFD_ENDIAN_UNKNOWN: | |
720 | break; | |
c906108c SS |
721 | } |
722 | /* Specify the architecture of the target when it has been | |
723 | explicitly specified */ | |
a8cf2722 | 724 | if (selected_architecture_name () != NULL) |
c906108c SS |
725 | { |
726 | strcat (arg_buf, " --architecture="); | |
a8cf2722 | 727 | strcat (arg_buf, selected_architecture_name ()); |
c906108c | 728 | } |
f4b8c29b MF |
729 | /* Pass along gdb's concept of the sysroot. */ |
730 | strcat (arg_buf, " --sysroot="); | |
23bf70af | 731 | strcat (arg_buf, sysroot); |
c906108c SS |
732 | /* finally, any explicit args */ |
733 | if (args) | |
734 | { | |
c5aa993b | 735 | strcat (arg_buf, " "); /* 1 */ |
c906108c SS |
736 | strcat (arg_buf, args); |
737 | } | |
773a1edc | 738 | |
74cbb09e | 739 | gdb_argv argv (arg_buf); |
67a3048c | 740 | sim_argv = argv.release (); |
c906108c SS |
741 | |
742 | init_callbacks (); | |
db04efe6 | 743 | gdbsim_desc = sim_open (SIM_OPEN_DEBUG, &gdb_callback, exec_bfd, sim_argv); |
c906108c SS |
744 | |
745 | if (gdbsim_desc == 0) | |
db04efe6 | 746 | { |
67a3048c | 747 | freeargv (sim_argv); |
db04efe6 KB |
748 | sim_argv = NULL; |
749 | error (_("unable to create simulator instance")); | |
750 | } | |
751 | ||
752 | /* Reset the pid numberings for this batch of sim instances. */ | |
753 | next_pid = INITIAL_PID; | |
754 | ||
755 | /* Allocate the inferior data, but do not allocate a sim instance | |
756 | since we've already just done that. */ | |
0df8b418 MS |
757 | sim_data = get_sim_inferior_data (current_inferior (), |
758 | SIM_INSTANCE_NOT_NEEDED); | |
db04efe6 KB |
759 | |
760 | sim_data->gdbsim_desc = gdbsim_desc; | |
c906108c SS |
761 | |
762 | push_target (&gdbsim_ops); | |
c906108c | 763 | printf_filtered ("Connected to the simulator.\n"); |
52bb452f DJ |
764 | |
765 | /* There's nothing running after "target sim" or "load"; not until | |
766 | "run". */ | |
767 | inferior_ptid = null_ptid; | |
db04efe6 KB |
768 | |
769 | gdbsim_is_open = 1; | |
770 | } | |
771 | ||
772 | /* Callback for iterate_over_inferiors. Called (indirectly) by | |
773 | gdbsim_close(). */ | |
774 | ||
775 | static int | |
776 | gdbsim_close_inferior (struct inferior *inf, void *arg) | |
777 | { | |
18101a35 | 778 | struct sim_inferior_data *sim_data = sim_inferior_data_key.get (inf); |
db04efe6 KB |
779 | if (sim_data != NULL) |
780 | { | |
781 | ptid_t ptid = sim_data->remote_sim_ptid; | |
782 | ||
18101a35 | 783 | sim_inferior_data_key.clear (inf); |
db04efe6 KB |
784 | |
785 | /* Having a ptid allocated and stored in remote_sim_ptid does | |
0df8b418 | 786 | not mean that a corresponding inferior was ever created. |
db04efe6 KB |
787 | Thus we need to verify the existence of an inferior using the |
788 | pid in question before setting inferior_ptid via | |
789 | switch_to_thread() or mourning the inferior. */ | |
c9657e70 | 790 | if (find_inferior_ptid (ptid) != NULL) |
db04efe6 KB |
791 | { |
792 | switch_to_thread (ptid); | |
793 | generic_mourn_inferior (); | |
794 | } | |
795 | } | |
796 | ||
797 | return 0; | |
c906108c SS |
798 | } |
799 | ||
0df8b418 | 800 | /* Close out all files and local state before this target loses control. */ |
c906108c | 801 | |
f6ac5f3d PA |
802 | void |
803 | gdbsim_target::close () | |
c906108c | 804 | { |
ea35711c | 805 | if (remote_debug) |
1385f66c | 806 | fprintf_unfiltered (gdb_stdlog, "gdbsim_close\n"); |
c906108c | 807 | |
db04efe6 | 808 | iterate_over_inferiors (gdbsim_close_inferior, NULL); |
c906108c | 809 | |
db04efe6 | 810 | if (sim_argv != NULL) |
c906108c | 811 | { |
db04efe6 KB |
812 | freeargv (sim_argv); |
813 | sim_argv = NULL; | |
c906108c SS |
814 | } |
815 | ||
816 | end_callbacks (); | |
db04efe6 KB |
817 | |
818 | gdbsim_is_open = 0; | |
c906108c SS |
819 | } |
820 | ||
821 | /* Takes a program previously attached to and detaches it. | |
822 | The program may resume execution (some targets do, some don't) and will | |
823 | no longer stop on signals, etc. We better not have left any breakpoints | |
6bd6f3b6 SM |
824 | in the program or it'll die when it hits one. FROM_TTY says whether to be |
825 | verbose or not. */ | |
c906108c SS |
826 | /* Terminate the open connection to the remote debugger. |
827 | Use this when you want to detach and do something else with your gdb. */ | |
828 | ||
f6ac5f3d PA |
829 | void |
830 | gdbsim_target::detach (inferior *inf, int from_tty) | |
c906108c | 831 | { |
ea35711c | 832 | if (remote_debug) |
6bd6f3b6 | 833 | fprintf_unfiltered (gdb_stdlog, "gdbsim_detach\n"); |
c906108c | 834 | |
f6ac5f3d | 835 | unpush_target (this); /* calls gdbsim_close to do the real work */ |
c906108c SS |
836 | if (from_tty) |
837 | printf_filtered ("Ending simulator %s debugging\n", target_shortname); | |
838 | } | |
c5aa993b | 839 | |
c906108c SS |
840 | /* Resume execution of the target process. STEP says whether to single-step |
841 | or to run free; SIGGNAL is the signal value (e.g. SIGINT) to be given | |
842 | to the target, or zero for no signal. */ | |
843 | ||
db04efe6 KB |
844 | struct resume_data |
845 | { | |
2ea28649 | 846 | enum gdb_signal siggnal; |
db04efe6 KB |
847 | int step; |
848 | }; | |
849 | ||
850 | static int | |
851 | gdbsim_resume_inferior (struct inferior *inf, void *arg) | |
852 | { | |
853 | struct sim_inferior_data *sim_data | |
854 | = get_sim_inferior_data (inf, SIM_INSTANCE_NOT_NEEDED); | |
653090d3 | 855 | struct resume_data *rd = (struct resume_data *) arg; |
db04efe6 KB |
856 | |
857 | if (sim_data) | |
858 | { | |
859 | sim_data->resume_siggnal = rd->siggnal; | |
860 | sim_data->resume_step = rd->step; | |
861 | ||
862 | if (remote_debug) | |
1385f66c PA |
863 | fprintf_unfiltered (gdb_stdlog, |
864 | _("gdbsim_resume: pid %d, step %d, signal %d\n"), | |
865 | inf->pid, rd->step, rd->siggnal); | |
db04efe6 KB |
866 | } |
867 | ||
868 | /* When called from iterate_over_inferiors, a zero return causes the | |
869 | iteration process to proceed until there are no more inferiors to | |
870 | consider. */ | |
871 | return 0; | |
872 | } | |
c906108c | 873 | |
f6ac5f3d PA |
874 | void |
875 | gdbsim_target::resume (ptid_t ptid, int step, enum gdb_signal siggnal) | |
c906108c | 876 | { |
db04efe6 KB |
877 | struct resume_data rd; |
878 | struct sim_inferior_data *sim_data | |
879 | = get_sim_inferior_data_by_ptid (ptid, SIM_INSTANCE_NOT_NEEDED); | |
880 | ||
881 | rd.siggnal = siggnal; | |
882 | rd.step = step; | |
883 | ||
0df8b418 | 884 | /* We don't access any sim_data members within this function. |
db04efe6 KB |
885 | What's of interest is whether or not the call to |
886 | get_sim_inferior_data_by_ptid(), above, is able to obtain a | |
887 | non-NULL pointer. If it managed to obtain a non-NULL pointer, we | |
888 | know we have a single inferior to consider. If it's NULL, we | |
889 | either have multiple inferiors to resume or an error condition. */ | |
890 | ||
891 | if (sim_data) | |
c9657e70 | 892 | gdbsim_resume_inferior (find_inferior_ptid (ptid), &rd); |
d7e15655 | 893 | else if (ptid == minus_one_ptid) |
db04efe6 KB |
894 | iterate_over_inferiors (gdbsim_resume_inferior, &rd); |
895 | else | |
8a3fe4f8 | 896 | error (_("The program is not being run.")); |
c906108c SS |
897 | } |
898 | ||
bfedc46a | 899 | /* Notify the simulator of an asynchronous request to interrupt. |
c5aa993b | 900 | |
bfedc46a | 901 | The simulator shall ensure that the interrupt request is eventually |
c906108c | 902 | delivered to the simulator. If the call is made while the |
bfedc46a | 903 | simulator is not running then the interrupt request is processed when |
c906108c SS |
904 | the simulator is next resumed. |
905 | ||
db04efe6 KB |
906 | For simulators that do not support this operation, just abort. */ |
907 | ||
908 | static int | |
bfedc46a | 909 | gdbsim_interrupt_inferior (struct inferior *inf, void *arg) |
db04efe6 KB |
910 | { |
911 | struct sim_inferior_data *sim_data | |
912 | = get_sim_inferior_data (inf, SIM_INSTANCE_NEEDED); | |
913 | ||
914 | if (sim_data) | |
915 | { | |
916 | if (!sim_stop (sim_data->gdbsim_desc)) | |
917 | { | |
918 | quit (); | |
919 | } | |
920 | } | |
921 | ||
922 | /* When called from iterate_over_inferiors, a zero return causes the | |
923 | iteration process to proceed until there are no more inferiors to | |
924 | consider. */ | |
925 | return 0; | |
926 | } | |
c906108c | 927 | |
f6ac5f3d PA |
928 | void |
929 | gdbsim_target::interrupt () | |
c906108c | 930 | { |
f6cfb427 | 931 | iterate_over_inferiors (gdbsim_interrupt_inferior, NULL); |
c906108c SS |
932 | } |
933 | ||
934 | /* GDB version of os_poll_quit callback. | |
8a0ce09a | 935 | Taken from gdb/util.c - should be in a library. */ |
c906108c SS |
936 | |
937 | static int | |
fba45db2 | 938 | gdb_os_poll_quit (host_callback *p) |
c906108c | 939 | { |
98bbd631 AC |
940 | if (deprecated_ui_loop_hook != NULL) |
941 | deprecated_ui_loop_hook (0); | |
7a292a7a | 942 | |
522002f9 | 943 | if (check_quit_flag ()) /* gdb's idea of quit */ |
abf009ef | 944 | return 1; |
c906108c SS |
945 | return 0; |
946 | } | |
947 | ||
948 | /* Wait for inferior process to do something. Return pid of child, | |
949 | or -1 in case of error; store status through argument pointer STATUS, | |
0df8b418 | 950 | just as `wait' would. */ |
c906108c SS |
951 | |
952 | static void | |
fba45db2 | 953 | gdbsim_cntrl_c (int signo) |
c906108c | 954 | { |
f6ac5f3d | 955 | gdbsim_ops.interrupt (); |
c906108c SS |
956 | } |
957 | ||
f6ac5f3d PA |
958 | ptid_t |
959 | gdbsim_target::wait (ptid_t ptid, struct target_waitstatus *status, int options) | |
c906108c | 960 | { |
db04efe6 | 961 | struct sim_inferior_data *sim_data; |
a40805d4 | 962 | static sighandler_t prev_sigint; |
c906108c SS |
963 | int sigrc = 0; |
964 | enum sim_stop reason = sim_running; | |
965 | ||
db04efe6 KB |
966 | /* This target isn't able to (yet) resume more than one inferior at a time. |
967 | When ptid is minus_one_ptid, just use the current inferior. If we're | |
968 | given an explicit pid, we'll try to find it and use that instead. */ | |
d7e15655 | 969 | if (ptid == minus_one_ptid) |
0df8b418 MS |
970 | sim_data = get_sim_inferior_data (current_inferior (), |
971 | SIM_INSTANCE_NEEDED); | |
db04efe6 KB |
972 | else |
973 | { | |
974 | sim_data = get_sim_inferior_data_by_ptid (ptid, SIM_INSTANCE_NEEDED); | |
975 | if (sim_data == NULL) | |
976 | error (_("Unable to wait for pid %d. Inferior not found."), | |
e99b03dc | 977 | ptid.pid ()); |
db04efe6 KB |
978 | inferior_ptid = ptid; |
979 | } | |
980 | ||
ea35711c | 981 | if (remote_debug) |
1385f66c | 982 | fprintf_unfiltered (gdb_stdlog, "gdbsim_wait\n"); |
c906108c SS |
983 | |
984 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) | |
985 | { | |
986 | struct sigaction sa, osa; | |
987 | sa.sa_handler = gdbsim_cntrl_c; | |
988 | sigemptyset (&sa.sa_mask); | |
989 | sa.sa_flags = 0; | |
990 | sigaction (SIGINT, &sa, &osa); | |
991 | prev_sigint = osa.sa_handler; | |
992 | } | |
993 | #else | |
994 | prev_sigint = signal (SIGINT, gdbsim_cntrl_c); | |
995 | #endif | |
db04efe6 | 996 | sim_resume (sim_data->gdbsim_desc, sim_data->resume_step, |
74228e77 | 997 | sim_data->resume_siggnal); |
db04efe6 | 998 | |
c906108c | 999 | signal (SIGINT, prev_sigint); |
db04efe6 | 1000 | sim_data->resume_step = 0; |
c906108c | 1001 | |
db04efe6 | 1002 | sim_stop_reason (sim_data->gdbsim_desc, &reason, &sigrc); |
c906108c SS |
1003 | |
1004 | switch (reason) | |
1005 | { | |
1006 | case sim_exited: | |
1007 | status->kind = TARGET_WAITKIND_EXITED; | |
1008 | status->value.integer = sigrc; | |
1009 | break; | |
1010 | case sim_stopped: | |
1011 | switch (sigrc) | |
1012 | { | |
a493e3e2 | 1013 | case GDB_SIGNAL_ABRT: |
c906108c SS |
1014 | quit (); |
1015 | break; | |
a493e3e2 PA |
1016 | case GDB_SIGNAL_INT: |
1017 | case GDB_SIGNAL_TRAP: | |
c906108c SS |
1018 | default: |
1019 | status->kind = TARGET_WAITKIND_STOPPED; | |
653090d3 | 1020 | status->value.sig = (enum gdb_signal) sigrc; |
c906108c SS |
1021 | break; |
1022 | } | |
1023 | break; | |
1024 | case sim_signalled: | |
1025 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
653090d3 | 1026 | status->value.sig = (enum gdb_signal) sigrc; |
c906108c SS |
1027 | break; |
1028 | case sim_running: | |
1029 | case sim_polling: | |
0df8b418 | 1030 | /* FIXME: Is this correct? */ |
c906108c SS |
1031 | break; |
1032 | } | |
1033 | ||
39f77062 | 1034 | return inferior_ptid; |
c906108c SS |
1035 | } |
1036 | ||
1037 | /* Get ready to modify the registers array. On machines which store | |
1038 | individual registers, this doesn't need to do anything. On machines | |
1039 | which store all the registers in one fell swoop, this makes sure | |
1040 | that registers contains all the registers from the program being | |
1041 | debugged. */ | |
1042 | ||
f6ac5f3d PA |
1043 | void |
1044 | gdbsim_target::prepare_to_store (struct regcache *regcache) | |
c906108c | 1045 | { |
0df8b418 | 1046 | /* Do nothing, since we can store individual regs. */ |
c906108c SS |
1047 | } |
1048 | ||
146ec4db PA |
1049 | /* Helper for gdbsim_xfer_partial that handles memory transfers. |
1050 | Arguments are like target_xfer_partial. */ | |
d93bce06 | 1051 | |
9b409511 | 1052 | static enum target_xfer_status |
146ec4db PA |
1053 | gdbsim_xfer_memory (struct target_ops *target, |
1054 | gdb_byte *readbuf, const gdb_byte *writebuf, | |
9b409511 | 1055 | ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) |
c906108c | 1056 | { |
db04efe6 KB |
1057 | struct sim_inferior_data *sim_data |
1058 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
b55e14c7 | 1059 | int l; |
db04efe6 | 1060 | |
0c012db1 KB |
1061 | /* If this target doesn't have memory yet, return 0 causing the |
1062 | request to be passed to a lower target, hopefully an exec | |
1063 | file. */ | |
f6ac5f3d | 1064 | if (!target->has_memory ()) |
9b409511 | 1065 | return TARGET_XFER_EOF; |
52bb452f | 1066 | |
db04efe6 | 1067 | if (!sim_data->program_loaded) |
8a3fe4f8 | 1068 | error (_("No program loaded.")); |
c906108c | 1069 | |
db04efe6 KB |
1070 | /* Note that we obtained the sim_data pointer above using |
1071 | SIM_INSTANCE_NOT_NEEDED. We do this so that we don't needlessly | |
1072 | allocate a sim instance prior to loading a program. If we | |
1073 | get to this point in the code though, gdbsim_desc should be | |
1074 | non-NULL. (Note that a sim instance is needed in order to load | |
1075 | the program...) */ | |
1076 | gdb_assert (sim_data->gdbsim_desc != NULL); | |
1077 | ||
ea35711c | 1078 | if (remote_debug) |
fcde0081 | 1079 | fprintf_unfiltered (gdb_stdlog, |
146ec4db PA |
1080 | "gdbsim_xfer_memory: readbuf %s, writebuf %s, " |
1081 | "memaddr %s, len %s\n", | |
1082 | host_address_to_string (readbuf), | |
1083 | host_address_to_string (writebuf), | |
fcde0081 | 1084 | paddress (target_gdbarch (), memaddr), |
b55e14c7 | 1085 | pulongest (len)); |
c906108c | 1086 | |
146ec4db | 1087 | if (writebuf) |
c906108c | 1088 | { |
fcde0081 | 1089 | if (remote_debug && len > 0) |
146ec4db | 1090 | dump_mem (writebuf, len); |
b55e14c7 | 1091 | l = sim_write (sim_data->gdbsim_desc, memaddr, writebuf, len); |
c906108c | 1092 | } |
c5aa993b | 1093 | else |
c906108c | 1094 | { |
b55e14c7 | 1095 | l = sim_read (sim_data->gdbsim_desc, memaddr, readbuf, len); |
ea35711c | 1096 | if (remote_debug && len > 0) |
146ec4db | 1097 | dump_mem (readbuf, len); |
c5aa993b | 1098 | } |
9b409511 YQ |
1099 | if (l > 0) |
1100 | { | |
1101 | *xfered_len = (ULONGEST) l; | |
1102 | return TARGET_XFER_OK; | |
1103 | } | |
1104 | else if (l == 0) | |
1105 | return TARGET_XFER_EOF; | |
1106 | else | |
1107 | return TARGET_XFER_E_IO; | |
c906108c SS |
1108 | } |
1109 | ||
146ec4db PA |
1110 | /* Target to_xfer_partial implementation. */ |
1111 | ||
f6ac5f3d PA |
1112 | enum target_xfer_status |
1113 | gdbsim_target::xfer_partial (enum target_object object, | |
1114 | const char *annex, gdb_byte *readbuf, | |
1115 | const gdb_byte *writebuf, ULONGEST offset, ULONGEST len, | |
1116 | ULONGEST *xfered_len) | |
146ec4db PA |
1117 | { |
1118 | switch (object) | |
1119 | { | |
1120 | case TARGET_OBJECT_MEMORY: | |
f6ac5f3d | 1121 | return gdbsim_xfer_memory (this, readbuf, writebuf, offset, len, |
9b409511 | 1122 | xfered_len); |
146ec4db PA |
1123 | |
1124 | default: | |
2ed4b548 | 1125 | return TARGET_XFER_E_IO; |
146ec4db PA |
1126 | } |
1127 | } | |
1128 | ||
f6ac5f3d PA |
1129 | void |
1130 | gdbsim_target::files_info () | |
c906108c | 1131 | { |
db04efe6 KB |
1132 | struct sim_inferior_data *sim_data |
1133 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NEEDED); | |
0d18d720 | 1134 | const char *file = "nothing"; |
c906108c SS |
1135 | |
1136 | if (exec_bfd) | |
1137 | file = bfd_get_filename (exec_bfd); | |
1138 | ||
ea35711c | 1139 | if (remote_debug) |
1385f66c | 1140 | fprintf_unfiltered (gdb_stdlog, "gdbsim_files_info: file \"%s\"\n", file); |
c906108c SS |
1141 | |
1142 | if (exec_bfd) | |
1143 | { | |
1385f66c PA |
1144 | fprintf_unfiltered (gdb_stdlog, "\tAttached to %s running program %s\n", |
1145 | target_shortname, file); | |
db04efe6 | 1146 | sim_info (sim_data->gdbsim_desc, 0); |
c906108c SS |
1147 | } |
1148 | } | |
1149 | ||
1150 | /* Clear the simulator's notion of what the break points are. */ | |
1151 | ||
f6ac5f3d PA |
1152 | void |
1153 | gdbsim_target::mourn_inferior () | |
c5aa993b | 1154 | { |
ea35711c | 1155 | if (remote_debug) |
1385f66c | 1156 | fprintf_unfiltered (gdb_stdlog, "gdbsim_mourn_inferior:\n"); |
c906108c SS |
1157 | |
1158 | remove_breakpoints (); | |
1159 | generic_mourn_inferior (); | |
1160 | } | |
1161 | ||
c906108c SS |
1162 | /* Pass the command argument through to the simulator verbatim. The |
1163 | simulator must do any command interpretation work. */ | |
1164 | ||
1165 | void | |
0b39b52e | 1166 | simulator_command (const char *args, int from_tty) |
c906108c | 1167 | { |
db04efe6 KB |
1168 | struct sim_inferior_data *sim_data; |
1169 | ||
1170 | /* We use inferior_data() instead of get_sim_inferior_data() here in | |
1171 | order to avoid attaching a sim_inferior_data struct to an | |
1172 | inferior unnecessarily. The reason we take such care here is due | |
1173 | to the fact that this function, simulator_command(), may be called | |
1174 | even when the sim target is not active. If we were to use | |
1175 | get_sim_inferior_data() here, it is possible that this call would | |
1176 | be made either prior to gdbsim_open() or after gdbsim_close(), | |
1177 | thus allocating memory that would not be garbage collected until | |
1178 | the ultimate destruction of the associated inferior. */ | |
1179 | ||
18101a35 | 1180 | sim_data = sim_inferior_data_key.get (current_inferior ()); |
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 | ||
18101a35 | 1211 | sim_data = sim_inferior_data_key.get (current_inferior ()); |
56a9aa1d | 1212 | if (sim_data == NULL || sim_data->gdbsim_desc == NULL) |
386535dd | 1213 | return; |
56a9aa1d | 1214 | |
386535dd PA |
1215 | /* sim_complete_command returns a NULL-terminated malloc'ed array of |
1216 | malloc'ed strings. */ | |
1217 | struct sim_completions_deleter | |
1218 | { | |
1219 | void operator() (char **ptr) const | |
1220 | { | |
1221 | for (size_t i = 0; ptr[i] != NULL; i++) | |
1222 | xfree (ptr[i]); | |
1223 | xfree (ptr); | |
1224 | } | |
1225 | }; | |
1226 | ||
1227 | std::unique_ptr<char *[], sim_completions_deleter> sim_completions | |
1228 | (sim_complete_command (sim_data->gdbsim_desc, text, word)); | |
1229 | if (sim_completions == NULL) | |
1230 | return; | |
34370865 | 1231 | |
386535dd PA |
1232 | /* Count the elements and add completions from tail to head because |
1233 | below we'll swap elements out of the array in case add_completion | |
1234 | throws and the deleter deletes until it finds a NULL element. */ | |
1235 | size_t count = 0; | |
1236 | while (sim_completions[count] != NULL) | |
1237 | count++; | |
34370865 | 1238 | |
386535dd PA |
1239 | for (size_t i = count; i > 0; i--) |
1240 | { | |
1241 | gdb::unique_xmalloc_ptr<char> match (sim_completions[i - 1]); | |
1242 | sim_completions[i - 1] = NULL; | |
1243 | tracker.add_completion (std::move (match)); | |
1244 | } | |
56a9aa1d MF |
1245 | } |
1246 | ||
9de2bdd7 PA |
1247 | /* Check to see if a thread is still alive. */ |
1248 | ||
57810aa7 | 1249 | bool |
f6ac5f3d | 1250 | gdbsim_target::thread_alive (ptid_t ptid) |
9de2bdd7 | 1251 | { |
db04efe6 KB |
1252 | struct sim_inferior_data *sim_data |
1253 | = get_sim_inferior_data_by_ptid (ptid, SIM_INSTANCE_NOT_NEEDED); | |
1254 | ||
1255 | if (sim_data == NULL) | |
57810aa7 | 1256 | return false; |
db04efe6 | 1257 | |
d7e15655 | 1258 | if (ptid == sim_data->remote_sim_ptid) |
9de2bdd7 | 1259 | /* The simulators' task is always alive. */ |
57810aa7 | 1260 | return true; |
9de2bdd7 | 1261 | |
57810aa7 | 1262 | return false; |
9de2bdd7 PA |
1263 | } |
1264 | ||
a068643d | 1265 | /* Convert a thread ID to a string. */ |
9de2bdd7 | 1266 | |
a068643d | 1267 | std::string |
f6ac5f3d | 1268 | gdbsim_target::pid_to_str (ptid_t ptid) |
9de2bdd7 | 1269 | { |
9de2bdd7 PA |
1270 | return normal_pid_to_str (ptid); |
1271 | } | |
1272 | ||
0c012db1 KB |
1273 | /* Simulator memory may be accessed after the program has been loaded. */ |
1274 | ||
57810aa7 | 1275 | bool |
f6ac5f3d | 1276 | gdbsim_target::has_all_memory () |
0c012db1 KB |
1277 | { |
1278 | struct sim_inferior_data *sim_data | |
1279 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
1280 | ||
1281 | if (!sim_data->program_loaded) | |
57810aa7 | 1282 | return false; |
0c012db1 | 1283 | |
57810aa7 | 1284 | return true; |
0c012db1 KB |
1285 | } |
1286 | ||
57810aa7 | 1287 | bool |
f6ac5f3d | 1288 | gdbsim_target::has_memory () |
0c012db1 KB |
1289 | { |
1290 | struct sim_inferior_data *sim_data | |
1291 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
1292 | ||
1293 | if (!sim_data->program_loaded) | |
57810aa7 | 1294 | return false; |
0c012db1 | 1295 | |
57810aa7 | 1296 | return true; |
0c012db1 KB |
1297 | } |
1298 | ||
c906108c | 1299 | void |
fba45db2 | 1300 | _initialize_remote_sim (void) |
c906108c | 1301 | { |
56a9aa1d MF |
1302 | struct cmd_list_element *c; |
1303 | ||
d9f719f1 | 1304 | add_target (gdbsim_target_info, gdbsim_target_open); |
c906108c | 1305 | |
56a9aa1d MF |
1306 | c = add_com ("sim", class_obscure, simulator_command, |
1307 | _("Send a command to the simulator.")); | |
1308 | set_cmd_completer (c, sim_command_completer); | |
c906108c | 1309 | } |