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c906108c | 1 | /* Generic remote debugging interface for simulators. |
0a65a603 | 2 | |
b811d2c2 | 3 | Copyright (C) 1993-2020 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 | /* Naming convention: |
c906108c | 73 | |
f6ac5f3d PA |
74 | sim_* are the interface to the simulator (see remote-sim.h). |
75 | gdbsim_* are stuff which is internal to gdb. */ | |
c906108c | 76 | |
e0037b4c SM |
77 | /* Value of the next pid to allocate for an inferior. As indicated |
78 | elsewhere, its initial value is somewhat arbitrary; it's critical | |
79 | though that it's not zero or negative. */ | |
80 | static int next_pid; | |
81 | #define INITIAL_PID 42000 | |
82 | ||
83 | /* Simulator-specific, per-inferior state. */ | |
84 | struct sim_inferior_data { | |
85 | explicit sim_inferior_data (SIM_DESC desc) | |
86 | : gdbsim_desc (desc), | |
87 | remote_sim_ptid (next_pid, 0, next_pid) | |
88 | { | |
89 | ++next_pid; | |
90 | } | |
91 | ||
92 | ~sim_inferior_data (); | |
93 | ||
94 | /* Flag which indicates whether or not the program has been loaded. */ | |
95 | int program_loaded = 0; | |
96 | ||
97 | /* Simulator descriptor for this inferior. */ | |
98 | SIM_DESC gdbsim_desc; | |
99 | ||
100 | /* This is the ptid we use for this particular simulator instance. Its | |
101 | value is somewhat arbitrary, as the simulator target don't have a | |
102 | notion of tasks or threads, but we need something non-null to place | |
103 | in inferior_ptid. For simulators which permit multiple instances, | |
104 | we also need a unique identifier to use for each inferior. */ | |
105 | ptid_t remote_sim_ptid; | |
106 | ||
107 | /* Signal with which to resume. */ | |
108 | enum gdb_signal resume_siggnal = GDB_SIGNAL_0; | |
109 | ||
110 | /* Flag which indicates whether resume should step or not. */ | |
111 | int resume_step = 0; | |
112 | }; | |
113 | ||
d9f719f1 PA |
114 | static const target_info gdbsim_target_info = { |
115 | "sim", | |
116 | N_("simulator"), | |
117 | N_("Use the compiled-in simulator.") | |
118 | }; | |
119 | ||
f6ac5f3d | 120 | struct gdbsim_target final |
3b3dac9b | 121 | : public memory_breakpoint_target<process_stratum_target> |
f6ac5f3d | 122 | { |
3b3dac9b | 123 | gdbsim_target () = default; |
c906108c | 124 | |
d9f719f1 PA |
125 | const target_info &info () const override |
126 | { return gdbsim_target_info; } | |
c906108c | 127 | |
f6ac5f3d | 128 | void close () override; |
c906108c | 129 | |
f6ac5f3d | 130 | void detach (inferior *inf, int) override; |
c906108c | 131 | |
f6ac5f3d PA |
132 | void resume (ptid_t, int, enum gdb_signal) override; |
133 | ptid_t wait (ptid_t, struct target_waitstatus *, int) override; | |
c906108c | 134 | |
f6ac5f3d PA |
135 | void fetch_registers (struct regcache *, int) override; |
136 | void store_registers (struct regcache *, int) override; | |
137 | void prepare_to_store (struct regcache *) override; | |
c906108c | 138 | |
f6ac5f3d PA |
139 | enum target_xfer_status xfer_partial (enum target_object object, |
140 | const char *annex, | |
141 | gdb_byte *readbuf, | |
142 | const gdb_byte *writebuf, | |
143 | ULONGEST offset, ULONGEST len, | |
144 | ULONGEST *xfered_len) override; | |
145 | ||
146 | void files_info () override; | |
147 | ||
148 | void kill () override; | |
149 | ||
150 | void load (const char *, int) override; | |
151 | ||
152 | bool can_create_inferior () override { return true; } | |
153 | void create_inferior (const char *, const std::string &, | |
154 | char **, int) override; | |
155 | ||
156 | void mourn_inferior () override; | |
157 | ||
158 | void interrupt () override; | |
159 | ||
57810aa7 | 160 | bool thread_alive (ptid_t ptid) override; |
c906108c | 161 | |
a068643d | 162 | std::string pid_to_str (ptid_t) override; |
f6ac5f3d | 163 | |
57810aa7 PA |
164 | bool has_all_memory () override; |
165 | bool has_memory () override; | |
e0037b4c SM |
166 | |
167 | private: | |
168 | sim_inferior_data *get_inferior_data_by_ptid (ptid_t ptid, | |
169 | int sim_instance_needed); | |
170 | void resume_one_inferior (inferior *inf, bool step, gdb_signal siggnal); | |
171 | void close_one_inferior (inferior *inf); | |
f6ac5f3d PA |
172 | }; |
173 | ||
174 | static struct gdbsim_target gdbsim_ops; | |
c906108c | 175 | |
18101a35 TT |
176 | static inferior_key<sim_inferior_data> sim_inferior_data_key; |
177 | ||
db04efe6 KB |
178 | /* Flag indicating the "open" status of this module. It's set to 1 |
179 | in gdbsim_open() and 0 in gdbsim_close(). */ | |
180 | static int gdbsim_is_open = 0; | |
181 | ||
db04efe6 KB |
182 | /* Argument list to pass to sim_open(). It is allocated in gdbsim_open() |
183 | and deallocated in gdbsim_close(). The lifetime needs to extend beyond | |
184 | the call to gdbsim_open() due to the fact that other sim instances other | |
185 | than the first will be allocated after the gdbsim_open() call. */ | |
186 | static char **sim_argv = NULL; | |
187 | ||
188 | /* OS-level callback functions for write, flush, etc. */ | |
189 | static host_callback gdb_callback; | |
190 | static int callbacks_initialized = 0; | |
191 | ||
192 | /* Callback for iterate_over_inferiors. It checks to see if the sim | |
193 | descriptor passed via ARG is the same as that for the inferior | |
194 | designated by INF. Return true if so; false otherwise. */ | |
195 | ||
196 | static int | |
197 | check_for_duplicate_sim_descriptor (struct inferior *inf, void *arg) | |
198 | { | |
199 | struct sim_inferior_data *sim_data; | |
653090d3 | 200 | SIM_DESC new_sim_desc = (SIM_DESC) arg; |
db04efe6 | 201 | |
18101a35 | 202 | sim_data = sim_inferior_data_key.get (inf); |
db04efe6 KB |
203 | |
204 | return (sim_data != NULL && sim_data->gdbsim_desc == new_sim_desc); | |
205 | } | |
206 | ||
207 | /* Flags indicating whether or not a sim instance is needed. One of these | |
208 | flags should be passed to get_sim_inferior_data(). */ | |
209 | ||
210 | enum {SIM_INSTANCE_NOT_NEEDED = 0, SIM_INSTANCE_NEEDED = 1}; | |
211 | ||
212 | /* Obtain pointer to per-inferior simulator data, allocating it if necessary. | |
213 | Attempt to open the sim if SIM_INSTANCE_NEEDED is true. */ | |
214 | ||
215 | static struct sim_inferior_data * | |
216 | get_sim_inferior_data (struct inferior *inf, int sim_instance_needed) | |
217 | { | |
218 | SIM_DESC sim_desc = NULL; | |
18101a35 | 219 | struct sim_inferior_data *sim_data = sim_inferior_data_key.get (inf); |
db04efe6 KB |
220 | |
221 | /* Try to allocate a new sim instance, if needed. We do this ahead of | |
222 | a potential allocation of a sim_inferior_data struct in order to | |
223 | avoid needlessly allocating that struct in the event that the sim | |
224 | instance allocation fails. */ | |
74228e77 | 225 | if (sim_instance_needed == SIM_INSTANCE_NEEDED |
db04efe6 KB |
226 | && (sim_data == NULL || sim_data->gdbsim_desc == NULL)) |
227 | { | |
228 | struct inferior *idup; | |
229 | sim_desc = sim_open (SIM_OPEN_DEBUG, &gdb_callback, exec_bfd, sim_argv); | |
230 | if (sim_desc == NULL) | |
231 | error (_("Unable to create simulator instance for inferior %d."), | |
232 | inf->num); | |
233 | ||
234 | idup = iterate_over_inferiors (check_for_duplicate_sim_descriptor, | |
74228e77 | 235 | sim_desc); |
db04efe6 KB |
236 | if (idup != NULL) |
237 | { | |
238 | /* We don't close the descriptor due to the fact that it's | |
239 | shared with some other inferior. If we were to close it, | |
240 | that might needlessly muck up the other inferior. Of | |
241 | course, it's possible that the damage has already been | |
242 | done... Note that it *will* ultimately be closed during | |
243 | cleanup of the other inferior. */ | |
244 | sim_desc = NULL; | |
245 | error ( | |
246 | _("Inferior %d and inferior %d would have identical simulator state.\n" | |
247 | "(This simulator does not support the running of more than one inferior.)"), | |
74228e77 RM |
248 | inf->num, idup->num); |
249 | } | |
db04efe6 KB |
250 | } |
251 | ||
252 | if (sim_data == NULL) | |
253 | { | |
18101a35 | 254 | sim_data = sim_inferior_data_key.emplace (inf, sim_desc); |
db04efe6 KB |
255 | } |
256 | else if (sim_desc) | |
257 | { | |
258 | /* This handles the case where sim_data was allocated prior to | |
74228e77 | 259 | needing a sim instance. */ |
db04efe6 KB |
260 | sim_data->gdbsim_desc = sim_desc; |
261 | } | |
c906108c | 262 | |
c906108c | 263 | |
db04efe6 KB |
264 | return sim_data; |
265 | } | |
266 | ||
267 | /* Return pointer to per-inferior simulator data using PTID to find the | |
268 | inferior in question. Return NULL when no inferior is found or | |
269 | when ptid has a zero or negative pid component. */ | |
270 | ||
e0037b4c SM |
271 | sim_inferior_data * |
272 | gdbsim_target::get_inferior_data_by_ptid (ptid_t ptid, | |
273 | int sim_instance_needed) | |
db04efe6 KB |
274 | { |
275 | struct inferior *inf; | |
e99b03dc | 276 | int pid = ptid.pid (); |
db04efe6 KB |
277 | |
278 | if (pid <= 0) | |
279 | return NULL; | |
74228e77 | 280 | |
e0037b4c | 281 | inf = find_inferior_pid (this, pid); |
db04efe6 KB |
282 | |
283 | if (inf) | |
284 | return get_sim_inferior_data (inf, sim_instance_needed); | |
285 | else | |
286 | return NULL; | |
287 | } | |
288 | ||
289 | /* Free the per-inferior simulator data. */ | |
290 | ||
18101a35 | 291 | sim_inferior_data::~sim_inferior_data () |
db04efe6 | 292 | { |
18101a35 TT |
293 | if (gdbsim_desc) |
294 | sim_close (gdbsim_desc, 0); | |
db04efe6 | 295 | } |
9de2bdd7 | 296 | |
c906108c | 297 | static void |
146ec4db | 298 | dump_mem (const gdb_byte *buf, int len) |
c906108c | 299 | { |
1385f66c | 300 | fputs_unfiltered ("\t", gdb_stdlog); |
3d468296 AB |
301 | |
302 | if (len == 8 || len == 4) | |
c906108c | 303 | { |
3d468296 | 304 | uint32_t l[2]; |
123f5f96 | 305 | |
3d468296 | 306 | memcpy (l, buf, len); |
1385f66c | 307 | fprintf_unfiltered (gdb_stdlog, "0x%08x", l[0]); |
3d468296 | 308 | if (len == 8) |
1385f66c | 309 | fprintf_unfiltered (gdb_stdlog, " 0x%08x", l[1]); |
3d468296 AB |
310 | } |
311 | else | |
312 | { | |
313 | int i; | |
123f5f96 | 314 | |
3d468296 | 315 | for (i = 0; i < len; i++) |
1385f66c | 316 | fprintf_unfiltered (gdb_stdlog, "0x%02x ", buf[i]); |
c906108c | 317 | } |
3d468296 | 318 | |
1385f66c | 319 | fputs_unfiltered ("\n", gdb_stdlog); |
c906108c SS |
320 | } |
321 | ||
c906108c SS |
322 | /* Initialize gdb_callback. */ |
323 | ||
324 | static void | |
fba45db2 | 325 | init_callbacks (void) |
c906108c | 326 | { |
c5aa993b | 327 | if (!callbacks_initialized) |
c906108c SS |
328 | { |
329 | gdb_callback = default_callback; | |
330 | gdb_callback.init (&gdb_callback); | |
331 | gdb_callback.write_stdout = gdb_os_write_stdout; | |
332 | gdb_callback.flush_stdout = gdb_os_flush_stdout; | |
333 | gdb_callback.write_stderr = gdb_os_write_stderr; | |
334 | gdb_callback.flush_stderr = gdb_os_flush_stderr; | |
335 | gdb_callback.printf_filtered = gdb_os_printf_filtered; | |
336 | gdb_callback.vprintf_filtered = gdb_os_vprintf_filtered; | |
337 | gdb_callback.evprintf_filtered = gdb_os_evprintf_filtered; | |
338 | gdb_callback.error = gdb_os_error; | |
339 | gdb_callback.poll_quit = gdb_os_poll_quit; | |
340 | gdb_callback.magic = HOST_CALLBACK_MAGIC; | |
341 | callbacks_initialized = 1; | |
342 | } | |
343 | } | |
344 | ||
345 | /* Release callbacks (free resources used by them). */ | |
346 | ||
347 | static void | |
fba45db2 | 348 | end_callbacks (void) |
c906108c SS |
349 | { |
350 | if (callbacks_initialized) | |
351 | { | |
352 | gdb_callback.shutdown (&gdb_callback); | |
353 | callbacks_initialized = 0; | |
354 | } | |
355 | } | |
356 | ||
357 | /* GDB version of os_write_stdout callback. */ | |
358 | ||
c5aa993b | 359 | static int |
fba45db2 | 360 | gdb_os_write_stdout (host_callback *p, const char *buf, int len) |
c906108c | 361 | { |
d9fcf2fb | 362 | ui_file_write (gdb_stdtarg, buf, len); |
c906108c SS |
363 | return len; |
364 | } | |
365 | ||
366 | /* GDB version of os_flush_stdout callback. */ | |
367 | ||
368 | static void | |
fba45db2 | 369 | gdb_os_flush_stdout (host_callback *p) |
c906108c | 370 | { |
4ce44c66 | 371 | gdb_flush (gdb_stdtarg); |
c906108c SS |
372 | } |
373 | ||
374 | /* GDB version of os_write_stderr callback. */ | |
375 | ||
c5aa993b | 376 | static int |
fba45db2 | 377 | gdb_os_write_stderr (host_callback *p, const char *buf, int len) |
c906108c SS |
378 | { |
379 | int i; | |
380 | char b[2]; | |
381 | ||
c5aa993b | 382 | for (i = 0; i < len; i++) |
c906108c SS |
383 | { |
384 | b[0] = buf[i]; | |
385 | b[1] = 0; | |
22e8e3c7 | 386 | fputs_unfiltered (b, gdb_stdtargerr); |
c906108c SS |
387 | } |
388 | return len; | |
389 | } | |
390 | ||
391 | /* GDB version of os_flush_stderr callback. */ | |
392 | ||
393 | static void | |
fba45db2 | 394 | gdb_os_flush_stderr (host_callback *p) |
c906108c | 395 | { |
22e8e3c7 | 396 | gdb_flush (gdb_stdtargerr); |
c906108c SS |
397 | } |
398 | ||
399 | /* GDB version of printf_filtered callback. */ | |
400 | ||
7104e59b SM |
401 | static void ATTRIBUTE_PRINTF (2, 3) |
402 | gdb_os_printf_filtered (host_callback * p, const char *format, ...) | |
c906108c SS |
403 | { |
404 | va_list args; | |
c906108c | 405 | |
123f5f96 | 406 | va_start (args, format); |
c906108c | 407 | vfprintf_filtered (gdb_stdout, format, args); |
c906108c SS |
408 | va_end (args); |
409 | } | |
410 | ||
411 | /* GDB version of error vprintf_filtered. */ | |
412 | ||
7104e59b | 413 | static void ATTRIBUTE_PRINTF (2, 0) |
c5aa993b | 414 | gdb_os_vprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c SS |
415 | { |
416 | vfprintf_filtered (gdb_stdout, format, ap); | |
417 | } | |
418 | ||
419 | /* GDB version of error evprintf_filtered. */ | |
420 | ||
7104e59b | 421 | static void ATTRIBUTE_PRINTF (2, 0) |
c5aa993b | 422 | gdb_os_evprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c SS |
423 | { |
424 | vfprintf_filtered (gdb_stderr, format, ap); | |
425 | } | |
426 | ||
427 | /* GDB version of error callback. */ | |
428 | ||
7104e59b | 429 | static void ATTRIBUTE_PRINTF (2, 3) |
58d4abe1 | 430 | gdb_os_error (host_callback * p, const char *format, ...) |
c906108c | 431 | { |
58d4abe1 | 432 | va_list args; |
123f5f96 | 433 | |
58d4abe1 PA |
434 | va_start (args, format); |
435 | verror (format, args); | |
436 | va_end (args); | |
c906108c SS |
437 | } |
438 | ||
8238d0bf | 439 | int |
e7faf938 | 440 | one2one_register_sim_regno (struct gdbarch *gdbarch, int regnum) |
8238d0bf AC |
441 | { |
442 | /* Only makes sense to supply raw registers. */ | |
e7faf938 | 443 | gdb_assert (regnum >= 0 && regnum < gdbarch_num_regs (gdbarch)); |
8238d0bf AC |
444 | return regnum; |
445 | } | |
446 | ||
f6ac5f3d PA |
447 | void |
448 | gdbsim_target::fetch_registers (struct regcache *regcache, int regno) | |
c906108c | 449 | { |
ac7936df | 450 | struct gdbarch *gdbarch = regcache->arch (); |
e0037b4c | 451 | struct inferior *inf = find_inferior_ptid (this, regcache->ptid ()); |
db04efe6 | 452 | struct sim_inferior_data *sim_data |
bcc0c096 | 453 | = get_sim_inferior_data (inf, SIM_INSTANCE_NEEDED); |
123f5f96 | 454 | |
c5aa993b | 455 | if (regno == -1) |
c906108c | 456 | { |
40a6adc1 | 457 | for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++) |
f6ac5f3d | 458 | fetch_registers (regcache, regno); |
8238d0bf | 459 | return; |
c906108c | 460 | } |
8238d0bf | 461 | |
40a6adc1 | 462 | switch (gdbarch_register_sim_regno (gdbarch, regno)) |
c906108c | 463 | { |
8238d0bf AC |
464 | case LEGACY_SIM_REGNO_IGNORE: |
465 | break; | |
466 | case SIM_REGNO_DOES_NOT_EXIST: | |
467 | { | |
468 | /* For moment treat a `does not exist' register the same way | |
74228e77 | 469 | as an ``unavailable'' register. */ |
a4d1e79a | 470 | regcache->raw_supply_zeroed (regno); |
8238d0bf AC |
471 | break; |
472 | } | |
74228e77 | 473 | |
8238d0bf AC |
474 | default: |
475 | { | |
476 | static int warn_user = 1; | |
a4d1e79a AH |
477 | int regsize = register_size (gdbarch, regno); |
478 | gdb::byte_vector buf (regsize, 0); | |
8238d0bf | 479 | int nr_bytes; |
123f5f96 | 480 | |
40a6adc1 | 481 | gdb_assert (regno >= 0 && regno < gdbarch_num_regs (gdbarch)); |
db04efe6 | 482 | nr_bytes = sim_fetch_register (sim_data->gdbsim_desc, |
474c1661 | 483 | gdbarch_register_sim_regno |
40a6adc1 | 484 | (gdbarch, regno), |
a4d1e79a AH |
485 | buf.data (), regsize); |
486 | if (nr_bytes > 0 && nr_bytes != regsize && warn_user) | |
8238d0bf AC |
487 | { |
488 | fprintf_unfiltered (gdb_stderr, | |
0df8b418 MS |
489 | "Size of register %s (%d/%d) " |
490 | "incorrect (%d instead of %d))", | |
40a6adc1 | 491 | gdbarch_register_name (gdbarch, regno), |
474c1661 | 492 | regno, |
a4d1e79a AH |
493 | gdbarch_register_sim_regno (gdbarch, regno), |
494 | nr_bytes, regsize); | |
8238d0bf AC |
495 | warn_user = 0; |
496 | } | |
497 | /* FIXME: cagney/2002-05-27: Should check `nr_bytes == 0' | |
278a7cf7 | 498 | indicating that GDB and the SIM have different ideas about |
8238d0bf AC |
499 | which registers are fetchable. */ |
500 | /* Else if (nr_bytes < 0): an old simulator, that doesn't | |
501 | think to return the register size. Just assume all is ok. */ | |
a4d1e79a | 502 | regcache->raw_supply (regno, buf.data ()); |
ea35711c | 503 | if (remote_debug) |
8238d0bf | 504 | { |
1385f66c PA |
505 | fprintf_unfiltered (gdb_stdlog, |
506 | "gdbsim_fetch_register: %d", regno); | |
8238d0bf | 507 | /* FIXME: We could print something more intelligible. */ |
a4d1e79a | 508 | dump_mem (buf.data (), regsize); |
8238d0bf AC |
509 | } |
510 | break; | |
511 | } | |
c906108c SS |
512 | } |
513 | } | |
514 | ||
515 | ||
f6ac5f3d PA |
516 | void |
517 | gdbsim_target::store_registers (struct regcache *regcache, int regno) | |
c906108c | 518 | { |
ac7936df | 519 | struct gdbarch *gdbarch = regcache->arch (); |
e0037b4c | 520 | struct inferior *inf = find_inferior_ptid (this, regcache->ptid ()); |
db04efe6 | 521 | struct sim_inferior_data *sim_data |
bcc0c096 | 522 | = get_sim_inferior_data (inf, SIM_INSTANCE_NEEDED); |
db04efe6 | 523 | |
c5aa993b | 524 | if (regno == -1) |
c906108c | 525 | { |
40a6adc1 | 526 | for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++) |
f6ac5f3d | 527 | store_registers (regcache, regno); |
8238d0bf | 528 | return; |
c906108c | 529 | } |
40a6adc1 | 530 | else if (gdbarch_register_sim_regno (gdbarch, regno) >= 0) |
c906108c | 531 | { |
a4d1e79a AH |
532 | int regsize = register_size (gdbarch, regno); |
533 | gdb::byte_vector tmp (regsize); | |
c906108c | 534 | int nr_bytes; |
123f5f96 | 535 | |
a4d1e79a | 536 | regcache->cooked_read (regno, tmp.data ()); |
db04efe6 | 537 | nr_bytes = sim_store_register (sim_data->gdbsim_desc, |
474c1661 | 538 | gdbarch_register_sim_regno |
40a6adc1 | 539 | (gdbarch, regno), |
a4d1e79a AH |
540 | tmp.data (), regsize); |
541 | ||
542 | if (nr_bytes > 0 && nr_bytes != regsize) | |
8e65ff28 | 543 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 544 | _("Register size different to expected")); |
dae477fe | 545 | if (nr_bytes < 0) |
74228e77 RM |
546 | internal_error (__FILE__, __LINE__, |
547 | _("Register %d not updated"), regno); | |
dae477fe | 548 | if (nr_bytes == 0) |
74228e77 RM |
549 | warning (_("Register %s not updated"), |
550 | gdbarch_register_name (gdbarch, regno)); | |
dae477fe | 551 | |
ea35711c | 552 | if (remote_debug) |
c906108c | 553 | { |
1385f66c | 554 | fprintf_unfiltered (gdb_stdlog, "gdbsim_store_register: %d", regno); |
c906108c | 555 | /* FIXME: We could print something more intelligible. */ |
a4d1e79a | 556 | dump_mem (tmp.data (), regsize); |
c906108c SS |
557 | } |
558 | } | |
559 | } | |
560 | ||
561 | /* Kill the running program. This may involve closing any open files | |
562 | and releasing other resources acquired by the simulated program. */ | |
563 | ||
f6ac5f3d PA |
564 | void |
565 | gdbsim_target::kill () | |
c906108c | 566 | { |
ea35711c | 567 | if (remote_debug) |
1385f66c | 568 | fprintf_unfiltered (gdb_stdlog, "gdbsim_kill\n"); |
c906108c SS |
569 | |
570 | /* There is no need to `kill' running simulator - the simulator is | |
52bb452f | 571 | not running. Mourning it is enough. */ |
bc1e6c81 | 572 | target_mourn_inferior (inferior_ptid); |
c906108c SS |
573 | } |
574 | ||
575 | /* Load an executable file into the target process. This is expected to | |
576 | not only bring new code into the target process, but also to update | |
577 | GDB's symbol tables to match. */ | |
578 | ||
f6ac5f3d PA |
579 | void |
580 | gdbsim_target::load (const char *args, int fromtty) | |
c906108c | 581 | { |
b2b255bd | 582 | const char *prog; |
db04efe6 KB |
583 | struct sim_inferior_data *sim_data |
584 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NEEDED); | |
1986bccd | 585 | |
d1a41061 PP |
586 | if (args == NULL) |
587 | error_no_arg (_("program to load")); | |
1986bccd | 588 | |
773a1edc | 589 | gdb_argv argv (args); |
1986bccd AS |
590 | |
591 | prog = tilde_expand (argv[0]); | |
592 | ||
593 | if (argv[1] != NULL) | |
594 | error (_("GDB sim does not yet support a load offset.")); | |
595 | ||
ea35711c | 596 | if (remote_debug) |
1385f66c | 597 | fprintf_unfiltered (gdb_stdlog, "gdbsim_load: prog \"%s\"\n", prog); |
c906108c | 598 | |
c906108c SS |
599 | /* FIXME: We will print two messages on error. |
600 | Need error to either not print anything if passed NULL or need | |
601 | another routine that doesn't take any arguments. */ | |
db04efe6 | 602 | if (sim_load (sim_data->gdbsim_desc, prog, NULL, fromtty) == SIM_RC_FAIL) |
8a3fe4f8 | 603 | error (_("unable to load program")); |
c906108c SS |
604 | |
605 | /* FIXME: If a load command should reset the targets registers then | |
0df8b418 | 606 | a call to sim_create_inferior() should go here. */ |
c906108c | 607 | |
db04efe6 | 608 | sim_data->program_loaded = 1; |
c906108c SS |
609 | } |
610 | ||
611 | ||
39f77062 | 612 | /* Start an inferior process and set inferior_ptid to its pid. |
c906108c SS |
613 | EXEC_FILE is the file to run. |
614 | ARGS is a string containing the arguments to the program. | |
615 | ENV is the environment vector to pass. Errors reported with error(). | |
616 | On VxWorks and various standalone systems, we ignore exec_file. */ | |
617 | /* This is called not only when we first attach, but also when the | |
618 | user types "run" after having attached. */ | |
619 | ||
f6ac5f3d PA |
620 | void |
621 | gdbsim_target::create_inferior (const char *exec_file, | |
622 | const std::string &allargs, | |
623 | char **env, int from_tty) | |
c906108c | 624 | { |
db04efe6 KB |
625 | struct sim_inferior_data *sim_data |
626 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NEEDED); | |
c906108c | 627 | int len; |
773a1edc | 628 | char *arg_buf; |
7c5ded6a | 629 | const char *args = allargs.c_str (); |
c906108c SS |
630 | |
631 | if (exec_file == 0 || exec_bfd == 0) | |
8a3fe4f8 | 632 | warning (_("No executable file specified.")); |
db04efe6 | 633 | if (!sim_data->program_loaded) |
8a3fe4f8 | 634 | warning (_("No program loaded.")); |
c906108c | 635 | |
ea35711c | 636 | if (remote_debug) |
1385f66c PA |
637 | fprintf_unfiltered (gdb_stdlog, |
638 | "gdbsim_create_inferior: exec_file \"%s\", args \"%s\"\n", | |
639 | (exec_file ? exec_file : "(NULL)"), | |
640 | args); | |
c906108c | 641 | |
d7e15655 | 642 | if (inferior_ptid == sim_data->remote_sim_ptid) |
f6ac5f3d | 643 | kill (); |
c906108c SS |
644 | remove_breakpoints (); |
645 | init_wait_for_inferior (); | |
646 | ||
773a1edc | 647 | gdb_argv built_argv; |
c906108c SS |
648 | if (exec_file != NULL) |
649 | { | |
7c5ded6a | 650 | len = strlen (exec_file) + 1 + allargs.size () + 1 + /*slop */ 10; |
c906108c SS |
651 | arg_buf = (char *) alloca (len); |
652 | arg_buf[0] = '\0'; | |
653 | strcat (arg_buf, exec_file); | |
654 | strcat (arg_buf, " "); | |
655 | strcat (arg_buf, args); | |
773a1edc | 656 | built_argv.reset (arg_buf); |
c906108c | 657 | } |
ddd60447 | 658 | |
773a1edc TT |
659 | if (sim_create_inferior (sim_data->gdbsim_desc, exec_bfd, |
660 | built_argv.get (), env) | |
ddd60447 MF |
661 | != SIM_RC_OK) |
662 | error (_("Unable to create sim inferior.")); | |
c906108c | 663 | |
db04efe6 | 664 | inferior_ptid = sim_data->remote_sim_ptid; |
e99b03dc | 665 | inferior_appeared (current_inferior (), inferior_ptid.pid ()); |
e0037b4c | 666 | add_thread_silent (this, inferior_ptid); |
9de2bdd7 | 667 | |
0df8b418 MS |
668 | insert_breakpoints (); /* Needed to get correct instruction |
669 | in cache. */ | |
c906108c | 670 | |
88056fbb | 671 | clear_proceed_status (0); |
c906108c SS |
672 | } |
673 | ||
674 | /* The open routine takes the rest of the parameters from the command, | |
675 | and (if successful) pushes a new target onto the stack. | |
676 | Targets should supply this routine, if only to provide an error message. */ | |
0df8b418 | 677 | /* Called when selecting the simulator. E.g. (gdb) target sim name. */ |
c906108c | 678 | |
d9f719f1 PA |
679 | static void |
680 | gdbsim_target_open (const char *args, int from_tty) | |
c906108c SS |
681 | { |
682 | int len; | |
683 | char *arg_buf; | |
db04efe6 | 684 | struct sim_inferior_data *sim_data; |
87d1b309 | 685 | const char *sysroot; |
db04efe6 | 686 | SIM_DESC gdbsim_desc; |
c906108c | 687 | |
87d1b309 MF |
688 | sysroot = gdb_sysroot; |
689 | if (is_target_filename (sysroot)) | |
690 | sysroot += strlen (TARGET_SYSROOT_PREFIX); | |
691 | ||
ea35711c | 692 | if (remote_debug) |
1385f66c PA |
693 | fprintf_unfiltered (gdb_stdlog, |
694 | "gdbsim_open: args \"%s\"\n", args ? args : "(null)"); | |
c906108c | 695 | |
db04efe6 KB |
696 | /* Ensure that the sim target is not on the target stack. This is |
697 | necessary, because if it is on the target stack, the call to | |
698 | push_target below will invoke sim_close(), thus freeing various | |
699 | state (including a sim instance) that we allocate prior to | |
700 | invoking push_target(). We want to delay the push_target() | |
701 | operation until after we complete those operations which could | |
702 | error out. */ | |
703 | if (gdbsim_is_open) | |
c906108c SS |
704 | unpush_target (&gdbsim_ops); |
705 | ||
c5aa993b | 706 | len = (7 + 1 /* gdbsim */ |
c906108c SS |
707 | + strlen (" -E little") |
708 | + strlen (" --architecture=xxxxxxxxxx") | |
23bf70af | 709 | + strlen (" --sysroot=") + strlen (sysroot) + |
c906108c | 710 | + (args ? strlen (args) : 0) |
c5aa993b | 711 | + 50) /* slack */ ; |
c906108c | 712 | arg_buf = (char *) alloca (len); |
c5aa993b | 713 | strcpy (arg_buf, "gdbsim"); /* 7 */ |
b6d373df | 714 | /* Specify the byte order for the target when it is explicitly |
0df8b418 | 715 | specified by the user (not auto detected). */ |
b6d373df | 716 | switch (selected_byte_order ()) |
c906108c | 717 | { |
a8cf2722 AC |
718 | case BFD_ENDIAN_BIG: |
719 | strcat (arg_buf, " -E big"); | |
720 | break; | |
721 | case BFD_ENDIAN_LITTLE: | |
722 | strcat (arg_buf, " -E little"); | |
723 | break; | |
724 | case BFD_ENDIAN_UNKNOWN: | |
725 | break; | |
c906108c SS |
726 | } |
727 | /* Specify the architecture of the target when it has been | |
728 | explicitly specified */ | |
a8cf2722 | 729 | if (selected_architecture_name () != NULL) |
c906108c SS |
730 | { |
731 | strcat (arg_buf, " --architecture="); | |
a8cf2722 | 732 | strcat (arg_buf, selected_architecture_name ()); |
c906108c | 733 | } |
f4b8c29b MF |
734 | /* Pass along gdb's concept of the sysroot. */ |
735 | strcat (arg_buf, " --sysroot="); | |
23bf70af | 736 | strcat (arg_buf, sysroot); |
c906108c SS |
737 | /* finally, any explicit args */ |
738 | if (args) | |
739 | { | |
c5aa993b | 740 | strcat (arg_buf, " "); /* 1 */ |
c906108c SS |
741 | strcat (arg_buf, args); |
742 | } | |
773a1edc | 743 | |
74cbb09e | 744 | gdb_argv argv (arg_buf); |
67a3048c | 745 | sim_argv = argv.release (); |
c906108c SS |
746 | |
747 | init_callbacks (); | |
db04efe6 | 748 | gdbsim_desc = sim_open (SIM_OPEN_DEBUG, &gdb_callback, exec_bfd, sim_argv); |
c906108c SS |
749 | |
750 | if (gdbsim_desc == 0) | |
db04efe6 | 751 | { |
67a3048c | 752 | freeargv (sim_argv); |
db04efe6 KB |
753 | sim_argv = NULL; |
754 | error (_("unable to create simulator instance")); | |
755 | } | |
756 | ||
757 | /* Reset the pid numberings for this batch of sim instances. */ | |
758 | next_pid = INITIAL_PID; | |
759 | ||
760 | /* Allocate the inferior data, but do not allocate a sim instance | |
761 | since we've already just done that. */ | |
0df8b418 MS |
762 | sim_data = get_sim_inferior_data (current_inferior (), |
763 | SIM_INSTANCE_NOT_NEEDED); | |
db04efe6 KB |
764 | |
765 | sim_data->gdbsim_desc = gdbsim_desc; | |
c906108c SS |
766 | |
767 | push_target (&gdbsim_ops); | |
c906108c | 768 | printf_filtered ("Connected to the simulator.\n"); |
52bb452f DJ |
769 | |
770 | /* There's nothing running after "target sim" or "load"; not until | |
771 | "run". */ | |
772 | inferior_ptid = null_ptid; | |
db04efe6 KB |
773 | |
774 | gdbsim_is_open = 1; | |
775 | } | |
776 | ||
e0037b4c | 777 | /* Helper for gdbsim_target::close. */ |
db04efe6 | 778 | |
e0037b4c SM |
779 | void |
780 | gdbsim_target::close_one_inferior (inferior *inf) | |
db04efe6 | 781 | { |
18101a35 | 782 | struct sim_inferior_data *sim_data = sim_inferior_data_key.get (inf); |
db04efe6 KB |
783 | if (sim_data != NULL) |
784 | { | |
785 | ptid_t ptid = sim_data->remote_sim_ptid; | |
786 | ||
18101a35 | 787 | sim_inferior_data_key.clear (inf); |
db04efe6 KB |
788 | |
789 | /* Having a ptid allocated and stored in remote_sim_ptid does | |
0df8b418 | 790 | not mean that a corresponding inferior was ever created. |
db04efe6 KB |
791 | Thus we need to verify the existence of an inferior using the |
792 | pid in question before setting inferior_ptid via | |
793 | switch_to_thread() or mourning the inferior. */ | |
e0037b4c | 794 | if (find_inferior_ptid (this, ptid) != NULL) |
db04efe6 | 795 | { |
e0037b4c | 796 | switch_to_thread (this, ptid); |
db04efe6 KB |
797 | generic_mourn_inferior (); |
798 | } | |
799 | } | |
c906108c SS |
800 | } |
801 | ||
0df8b418 | 802 | /* Close out all files and local state before this target loses control. */ |
c906108c | 803 | |
f6ac5f3d PA |
804 | void |
805 | gdbsim_target::close () | |
c906108c | 806 | { |
ea35711c | 807 | if (remote_debug) |
1385f66c | 808 | fprintf_unfiltered (gdb_stdlog, "gdbsim_close\n"); |
c906108c | 809 | |
e0037b4c SM |
810 | for (inferior *inf : all_inferiors (this)) |
811 | close_one_inferior (inf); | |
c906108c | 812 | |
db04efe6 | 813 | if (sim_argv != NULL) |
c906108c | 814 | { |
db04efe6 KB |
815 | freeargv (sim_argv); |
816 | sim_argv = NULL; | |
c906108c SS |
817 | } |
818 | ||
819 | end_callbacks (); | |
db04efe6 KB |
820 | |
821 | gdbsim_is_open = 0; | |
c906108c SS |
822 | } |
823 | ||
824 | /* Takes a program previously attached to and detaches it. | |
825 | The program may resume execution (some targets do, some don't) and will | |
826 | no longer stop on signals, etc. We better not have left any breakpoints | |
6bd6f3b6 SM |
827 | in the program or it'll die when it hits one. FROM_TTY says whether to be |
828 | verbose or not. */ | |
c906108c SS |
829 | /* Terminate the open connection to the remote debugger. |
830 | Use this when you want to detach and do something else with your gdb. */ | |
831 | ||
f6ac5f3d PA |
832 | void |
833 | gdbsim_target::detach (inferior *inf, int from_tty) | |
c906108c | 834 | { |
ea35711c | 835 | if (remote_debug) |
6bd6f3b6 | 836 | fprintf_unfiltered (gdb_stdlog, "gdbsim_detach\n"); |
c906108c | 837 | |
f6ac5f3d | 838 | unpush_target (this); /* calls gdbsim_close to do the real work */ |
c906108c SS |
839 | if (from_tty) |
840 | printf_filtered ("Ending simulator %s debugging\n", target_shortname); | |
841 | } | |
c5aa993b | 842 | |
c906108c SS |
843 | /* Resume execution of the target process. STEP says whether to single-step |
844 | or to run free; SIGGNAL is the signal value (e.g. SIGINT) to be given | |
845 | to the target, or zero for no signal. */ | |
846 | ||
e0037b4c SM |
847 | void |
848 | gdbsim_target::resume_one_inferior (inferior *inf, bool step, | |
849 | gdb_signal siggnal) | |
db04efe6 KB |
850 | { |
851 | struct sim_inferior_data *sim_data | |
852 | = get_sim_inferior_data (inf, SIM_INSTANCE_NOT_NEEDED); | |
db04efe6 KB |
853 | |
854 | if (sim_data) | |
855 | { | |
e0037b4c SM |
856 | sim_data->resume_siggnal = siggnal; |
857 | sim_data->resume_step = step; | |
db04efe6 KB |
858 | |
859 | if (remote_debug) | |
1385f66c PA |
860 | fprintf_unfiltered (gdb_stdlog, |
861 | _("gdbsim_resume: pid %d, step %d, signal %d\n"), | |
e0037b4c | 862 | inf->pid, step, siggnal); |
db04efe6 | 863 | } |
db04efe6 | 864 | } |
c906108c | 865 | |
f6ac5f3d PA |
866 | void |
867 | gdbsim_target::resume (ptid_t ptid, int step, enum gdb_signal siggnal) | |
c906108c | 868 | { |
db04efe6 | 869 | struct sim_inferior_data *sim_data |
e0037b4c | 870 | = get_inferior_data_by_ptid (ptid, SIM_INSTANCE_NOT_NEEDED); |
db04efe6 | 871 | |
0df8b418 | 872 | /* We don't access any sim_data members within this function. |
db04efe6 KB |
873 | What's of interest is whether or not the call to |
874 | get_sim_inferior_data_by_ptid(), above, is able to obtain a | |
875 | non-NULL pointer. If it managed to obtain a non-NULL pointer, we | |
876 | know we have a single inferior to consider. If it's NULL, we | |
877 | either have multiple inferiors to resume or an error condition. */ | |
878 | ||
879 | if (sim_data) | |
e0037b4c | 880 | resume_one_inferior (find_inferior_ptid (this, ptid), step, siggnal); |
d7e15655 | 881 | else if (ptid == minus_one_ptid) |
e0037b4c SM |
882 | { |
883 | for (inferior *inf : all_inferiors (this)) | |
884 | resume_one_inferior (inf, step, siggnal); | |
885 | } | |
db04efe6 | 886 | else |
8a3fe4f8 | 887 | error (_("The program is not being run.")); |
c906108c SS |
888 | } |
889 | ||
bfedc46a | 890 | /* Notify the simulator of an asynchronous request to interrupt. |
c5aa993b | 891 | |
bfedc46a | 892 | The simulator shall ensure that the interrupt request is eventually |
c906108c | 893 | delivered to the simulator. If the call is made while the |
bfedc46a | 894 | simulator is not running then the interrupt request is processed when |
c906108c SS |
895 | the simulator is next resumed. |
896 | ||
db04efe6 KB |
897 | For simulators that do not support this operation, just abort. */ |
898 | ||
899 | static int | |
bfedc46a | 900 | gdbsim_interrupt_inferior (struct inferior *inf, void *arg) |
db04efe6 KB |
901 | { |
902 | struct sim_inferior_data *sim_data | |
903 | = get_sim_inferior_data (inf, SIM_INSTANCE_NEEDED); | |
904 | ||
905 | if (sim_data) | |
906 | { | |
907 | if (!sim_stop (sim_data->gdbsim_desc)) | |
908 | { | |
909 | quit (); | |
910 | } | |
911 | } | |
912 | ||
913 | /* When called from iterate_over_inferiors, a zero return causes the | |
914 | iteration process to proceed until there are no more inferiors to | |
915 | consider. */ | |
916 | return 0; | |
917 | } | |
c906108c | 918 | |
f6ac5f3d PA |
919 | void |
920 | gdbsim_target::interrupt () | |
c906108c | 921 | { |
f6cfb427 | 922 | iterate_over_inferiors (gdbsim_interrupt_inferior, NULL); |
c906108c SS |
923 | } |
924 | ||
925 | /* GDB version of os_poll_quit callback. | |
8a0ce09a | 926 | Taken from gdb/util.c - should be in a library. */ |
c906108c SS |
927 | |
928 | static int | |
fba45db2 | 929 | gdb_os_poll_quit (host_callback *p) |
c906108c | 930 | { |
98bbd631 AC |
931 | if (deprecated_ui_loop_hook != NULL) |
932 | deprecated_ui_loop_hook (0); | |
7a292a7a | 933 | |
522002f9 | 934 | if (check_quit_flag ()) /* gdb's idea of quit */ |
abf009ef | 935 | return 1; |
c906108c SS |
936 | return 0; |
937 | } | |
938 | ||
939 | /* Wait for inferior process to do something. Return pid of child, | |
940 | or -1 in case of error; store status through argument pointer STATUS, | |
0df8b418 | 941 | just as `wait' would. */ |
c906108c SS |
942 | |
943 | static void | |
fba45db2 | 944 | gdbsim_cntrl_c (int signo) |
c906108c | 945 | { |
f6ac5f3d | 946 | gdbsim_ops.interrupt (); |
c906108c SS |
947 | } |
948 | ||
f6ac5f3d PA |
949 | ptid_t |
950 | gdbsim_target::wait (ptid_t ptid, struct target_waitstatus *status, int options) | |
c906108c | 951 | { |
db04efe6 | 952 | struct sim_inferior_data *sim_data; |
a40805d4 | 953 | static sighandler_t prev_sigint; |
c906108c SS |
954 | int sigrc = 0; |
955 | enum sim_stop reason = sim_running; | |
956 | ||
db04efe6 KB |
957 | /* This target isn't able to (yet) resume more than one inferior at a time. |
958 | When ptid is minus_one_ptid, just use the current inferior. If we're | |
959 | given an explicit pid, we'll try to find it and use that instead. */ | |
d7e15655 | 960 | if (ptid == minus_one_ptid) |
0df8b418 MS |
961 | sim_data = get_sim_inferior_data (current_inferior (), |
962 | SIM_INSTANCE_NEEDED); | |
db04efe6 KB |
963 | else |
964 | { | |
e0037b4c | 965 | sim_data = get_inferior_data_by_ptid (ptid, SIM_INSTANCE_NEEDED); |
db04efe6 KB |
966 | if (sim_data == NULL) |
967 | error (_("Unable to wait for pid %d. Inferior not found."), | |
e99b03dc | 968 | ptid.pid ()); |
db04efe6 KB |
969 | inferior_ptid = ptid; |
970 | } | |
971 | ||
ea35711c | 972 | if (remote_debug) |
1385f66c | 973 | fprintf_unfiltered (gdb_stdlog, "gdbsim_wait\n"); |
c906108c SS |
974 | |
975 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) | |
976 | { | |
977 | struct sigaction sa, osa; | |
978 | sa.sa_handler = gdbsim_cntrl_c; | |
979 | sigemptyset (&sa.sa_mask); | |
980 | sa.sa_flags = 0; | |
981 | sigaction (SIGINT, &sa, &osa); | |
982 | prev_sigint = osa.sa_handler; | |
983 | } | |
984 | #else | |
985 | prev_sigint = signal (SIGINT, gdbsim_cntrl_c); | |
986 | #endif | |
db04efe6 | 987 | sim_resume (sim_data->gdbsim_desc, sim_data->resume_step, |
74228e77 | 988 | sim_data->resume_siggnal); |
db04efe6 | 989 | |
c906108c | 990 | signal (SIGINT, prev_sigint); |
db04efe6 | 991 | sim_data->resume_step = 0; |
c906108c | 992 | |
db04efe6 | 993 | sim_stop_reason (sim_data->gdbsim_desc, &reason, &sigrc); |
c906108c SS |
994 | |
995 | switch (reason) | |
996 | { | |
997 | case sim_exited: | |
998 | status->kind = TARGET_WAITKIND_EXITED; | |
999 | status->value.integer = sigrc; | |
1000 | break; | |
1001 | case sim_stopped: | |
1002 | switch (sigrc) | |
1003 | { | |
a493e3e2 | 1004 | case GDB_SIGNAL_ABRT: |
c906108c SS |
1005 | quit (); |
1006 | break; | |
a493e3e2 PA |
1007 | case GDB_SIGNAL_INT: |
1008 | case GDB_SIGNAL_TRAP: | |
c906108c SS |
1009 | default: |
1010 | status->kind = TARGET_WAITKIND_STOPPED; | |
653090d3 | 1011 | status->value.sig = (enum gdb_signal) sigrc; |
c906108c SS |
1012 | break; |
1013 | } | |
1014 | break; | |
1015 | case sim_signalled: | |
1016 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
653090d3 | 1017 | status->value.sig = (enum gdb_signal) sigrc; |
c906108c SS |
1018 | break; |
1019 | case sim_running: | |
1020 | case sim_polling: | |
0df8b418 | 1021 | /* FIXME: Is this correct? */ |
c906108c SS |
1022 | break; |
1023 | } | |
1024 | ||
cf1d9e09 | 1025 | return sim_data->remote_sim_ptid; |
c906108c SS |
1026 | } |
1027 | ||
1028 | /* Get ready to modify the registers array. On machines which store | |
1029 | individual registers, this doesn't need to do anything. On machines | |
1030 | which store all the registers in one fell swoop, this makes sure | |
1031 | that registers contains all the registers from the program being | |
1032 | debugged. */ | |
1033 | ||
f6ac5f3d PA |
1034 | void |
1035 | gdbsim_target::prepare_to_store (struct regcache *regcache) | |
c906108c | 1036 | { |
0df8b418 | 1037 | /* Do nothing, since we can store individual regs. */ |
c906108c SS |
1038 | } |
1039 | ||
146ec4db PA |
1040 | /* Helper for gdbsim_xfer_partial that handles memory transfers. |
1041 | Arguments are like target_xfer_partial. */ | |
d93bce06 | 1042 | |
9b409511 | 1043 | static enum target_xfer_status |
146ec4db PA |
1044 | gdbsim_xfer_memory (struct target_ops *target, |
1045 | gdb_byte *readbuf, const gdb_byte *writebuf, | |
9b409511 | 1046 | ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) |
c906108c | 1047 | { |
db04efe6 KB |
1048 | struct sim_inferior_data *sim_data |
1049 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
b55e14c7 | 1050 | int l; |
db04efe6 | 1051 | |
0c012db1 KB |
1052 | /* If this target doesn't have memory yet, return 0 causing the |
1053 | request to be passed to a lower target, hopefully an exec | |
1054 | file. */ | |
f6ac5f3d | 1055 | if (!target->has_memory ()) |
9b409511 | 1056 | return TARGET_XFER_EOF; |
52bb452f | 1057 | |
db04efe6 | 1058 | if (!sim_data->program_loaded) |
8a3fe4f8 | 1059 | error (_("No program loaded.")); |
c906108c | 1060 | |
db04efe6 KB |
1061 | /* Note that we obtained the sim_data pointer above using |
1062 | SIM_INSTANCE_NOT_NEEDED. We do this so that we don't needlessly | |
1063 | allocate a sim instance prior to loading a program. If we | |
1064 | get to this point in the code though, gdbsim_desc should be | |
1065 | non-NULL. (Note that a sim instance is needed in order to load | |
1066 | the program...) */ | |
1067 | gdb_assert (sim_data->gdbsim_desc != NULL); | |
1068 | ||
ea35711c | 1069 | if (remote_debug) |
fcde0081 | 1070 | fprintf_unfiltered (gdb_stdlog, |
146ec4db PA |
1071 | "gdbsim_xfer_memory: readbuf %s, writebuf %s, " |
1072 | "memaddr %s, len %s\n", | |
1073 | host_address_to_string (readbuf), | |
1074 | host_address_to_string (writebuf), | |
fcde0081 | 1075 | paddress (target_gdbarch (), memaddr), |
b55e14c7 | 1076 | pulongest (len)); |
c906108c | 1077 | |
146ec4db | 1078 | if (writebuf) |
c906108c | 1079 | { |
fcde0081 | 1080 | if (remote_debug && len > 0) |
146ec4db | 1081 | dump_mem (writebuf, len); |
b55e14c7 | 1082 | l = sim_write (sim_data->gdbsim_desc, memaddr, writebuf, len); |
c906108c | 1083 | } |
c5aa993b | 1084 | else |
c906108c | 1085 | { |
b55e14c7 | 1086 | l = sim_read (sim_data->gdbsim_desc, memaddr, readbuf, len); |
ea35711c | 1087 | if (remote_debug && len > 0) |
146ec4db | 1088 | dump_mem (readbuf, len); |
c5aa993b | 1089 | } |
9b409511 YQ |
1090 | if (l > 0) |
1091 | { | |
1092 | *xfered_len = (ULONGEST) l; | |
1093 | return TARGET_XFER_OK; | |
1094 | } | |
1095 | else if (l == 0) | |
1096 | return TARGET_XFER_EOF; | |
1097 | else | |
1098 | return TARGET_XFER_E_IO; | |
c906108c SS |
1099 | } |
1100 | ||
146ec4db PA |
1101 | /* Target to_xfer_partial implementation. */ |
1102 | ||
f6ac5f3d PA |
1103 | enum target_xfer_status |
1104 | gdbsim_target::xfer_partial (enum target_object object, | |
1105 | const char *annex, gdb_byte *readbuf, | |
1106 | const gdb_byte *writebuf, ULONGEST offset, ULONGEST len, | |
1107 | ULONGEST *xfered_len) | |
146ec4db PA |
1108 | { |
1109 | switch (object) | |
1110 | { | |
1111 | case TARGET_OBJECT_MEMORY: | |
f6ac5f3d | 1112 | return gdbsim_xfer_memory (this, readbuf, writebuf, offset, len, |
9b409511 | 1113 | xfered_len); |
146ec4db PA |
1114 | |
1115 | default: | |
2ed4b548 | 1116 | return TARGET_XFER_E_IO; |
146ec4db PA |
1117 | } |
1118 | } | |
1119 | ||
f6ac5f3d PA |
1120 | void |
1121 | gdbsim_target::files_info () | |
c906108c | 1122 | { |
db04efe6 KB |
1123 | struct sim_inferior_data *sim_data |
1124 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NEEDED); | |
0d18d720 | 1125 | const char *file = "nothing"; |
c906108c SS |
1126 | |
1127 | if (exec_bfd) | |
1128 | file = bfd_get_filename (exec_bfd); | |
1129 | ||
ea35711c | 1130 | if (remote_debug) |
1385f66c | 1131 | fprintf_unfiltered (gdb_stdlog, "gdbsim_files_info: file \"%s\"\n", file); |
c906108c SS |
1132 | |
1133 | if (exec_bfd) | |
1134 | { | |
1385f66c PA |
1135 | fprintf_unfiltered (gdb_stdlog, "\tAttached to %s running program %s\n", |
1136 | target_shortname, file); | |
db04efe6 | 1137 | sim_info (sim_data->gdbsim_desc, 0); |
c906108c SS |
1138 | } |
1139 | } | |
1140 | ||
1141 | /* Clear the simulator's notion of what the break points are. */ | |
1142 | ||
f6ac5f3d PA |
1143 | void |
1144 | gdbsim_target::mourn_inferior () | |
c5aa993b | 1145 | { |
ea35711c | 1146 | if (remote_debug) |
1385f66c | 1147 | fprintf_unfiltered (gdb_stdlog, "gdbsim_mourn_inferior:\n"); |
c906108c SS |
1148 | |
1149 | remove_breakpoints (); | |
1150 | generic_mourn_inferior (); | |
1151 | } | |
1152 | ||
c906108c SS |
1153 | /* Pass the command argument through to the simulator verbatim. The |
1154 | simulator must do any command interpretation work. */ | |
1155 | ||
d04afd58 | 1156 | static void |
0b39b52e | 1157 | simulator_command (const char *args, int from_tty) |
c906108c | 1158 | { |
db04efe6 KB |
1159 | struct sim_inferior_data *sim_data; |
1160 | ||
1161 | /* We use inferior_data() instead of get_sim_inferior_data() here in | |
1162 | order to avoid attaching a sim_inferior_data struct to an | |
1163 | inferior unnecessarily. The reason we take such care here is due | |
1164 | to the fact that this function, simulator_command(), may be called | |
1165 | even when the sim target is not active. If we were to use | |
1166 | get_sim_inferior_data() here, it is possible that this call would | |
1167 | be made either prior to gdbsim_open() or after gdbsim_close(), | |
1168 | thus allocating memory that would not be garbage collected until | |
1169 | the ultimate destruction of the associated inferior. */ | |
1170 | ||
18101a35 | 1171 | sim_data = sim_inferior_data_key.get (current_inferior ()); |
db04efe6 | 1172 | if (sim_data == NULL || sim_data->gdbsim_desc == NULL) |
c906108c SS |
1173 | { |
1174 | ||
1175 | /* PREVIOUSLY: The user may give a command before the simulator | |
74228e77 RM |
1176 | is opened. [...] (??? assuming of course one wishes to |
1177 | continue to allow commands to be sent to unopened simulators, | |
1178 | which isn't entirely unreasonable). */ | |
c906108c SS |
1179 | |
1180 | /* The simulator is a builtin abstraction of a remote target. | |
74228e77 RM |
1181 | Consistent with that model, access to the simulator, via sim |
1182 | commands, is restricted to the period when the channel to the | |
1183 | simulator is open. */ | |
c906108c | 1184 | |
8a3fe4f8 | 1185 | error (_("Not connected to the simulator target")); |
c906108c SS |
1186 | } |
1187 | ||
db04efe6 | 1188 | sim_do_command (sim_data->gdbsim_desc, args); |
c906108c SS |
1189 | |
1190 | /* Invalidate the register cache, in case the simulator command does | |
0df8b418 | 1191 | something funny. */ |
c5aa993b | 1192 | registers_changed (); |
c906108c SS |
1193 | } |
1194 | ||
386535dd PA |
1195 | static void |
1196 | sim_command_completer (struct cmd_list_element *ignore, | |
1197 | completion_tracker &tracker, | |
1198 | const char *text, const char *word) | |
56a9aa1d MF |
1199 | { |
1200 | struct sim_inferior_data *sim_data; | |
1201 | ||
18101a35 | 1202 | sim_data = sim_inferior_data_key.get (current_inferior ()); |
56a9aa1d | 1203 | if (sim_data == NULL || sim_data->gdbsim_desc == NULL) |
386535dd | 1204 | return; |
56a9aa1d | 1205 | |
386535dd PA |
1206 | /* sim_complete_command returns a NULL-terminated malloc'ed array of |
1207 | malloc'ed strings. */ | |
1208 | struct sim_completions_deleter | |
1209 | { | |
1210 | void operator() (char **ptr) const | |
1211 | { | |
1212 | for (size_t i = 0; ptr[i] != NULL; i++) | |
1213 | xfree (ptr[i]); | |
1214 | xfree (ptr); | |
1215 | } | |
1216 | }; | |
1217 | ||
1218 | std::unique_ptr<char *[], sim_completions_deleter> sim_completions | |
1219 | (sim_complete_command (sim_data->gdbsim_desc, text, word)); | |
1220 | if (sim_completions == NULL) | |
1221 | return; | |
34370865 | 1222 | |
386535dd PA |
1223 | /* Count the elements and add completions from tail to head because |
1224 | below we'll swap elements out of the array in case add_completion | |
1225 | throws and the deleter deletes until it finds a NULL element. */ | |
1226 | size_t count = 0; | |
1227 | while (sim_completions[count] != NULL) | |
1228 | count++; | |
34370865 | 1229 | |
386535dd PA |
1230 | for (size_t i = count; i > 0; i--) |
1231 | { | |
1232 | gdb::unique_xmalloc_ptr<char> match (sim_completions[i - 1]); | |
1233 | sim_completions[i - 1] = NULL; | |
1234 | tracker.add_completion (std::move (match)); | |
1235 | } | |
56a9aa1d MF |
1236 | } |
1237 | ||
9de2bdd7 PA |
1238 | /* Check to see if a thread is still alive. */ |
1239 | ||
57810aa7 | 1240 | bool |
f6ac5f3d | 1241 | gdbsim_target::thread_alive (ptid_t ptid) |
9de2bdd7 | 1242 | { |
db04efe6 | 1243 | struct sim_inferior_data *sim_data |
e0037b4c | 1244 | = get_inferior_data_by_ptid (ptid, SIM_INSTANCE_NOT_NEEDED); |
db04efe6 KB |
1245 | |
1246 | if (sim_data == NULL) | |
57810aa7 | 1247 | return false; |
db04efe6 | 1248 | |
d7e15655 | 1249 | if (ptid == sim_data->remote_sim_ptid) |
9de2bdd7 | 1250 | /* The simulators' task is always alive. */ |
57810aa7 | 1251 | return true; |
9de2bdd7 | 1252 | |
57810aa7 | 1253 | return false; |
9de2bdd7 PA |
1254 | } |
1255 | ||
a068643d | 1256 | /* Convert a thread ID to a string. */ |
9de2bdd7 | 1257 | |
a068643d | 1258 | std::string |
f6ac5f3d | 1259 | gdbsim_target::pid_to_str (ptid_t ptid) |
9de2bdd7 | 1260 | { |
9de2bdd7 PA |
1261 | return normal_pid_to_str (ptid); |
1262 | } | |
1263 | ||
0c012db1 KB |
1264 | /* Simulator memory may be accessed after the program has been loaded. */ |
1265 | ||
57810aa7 | 1266 | bool |
f6ac5f3d | 1267 | gdbsim_target::has_all_memory () |
0c012db1 KB |
1268 | { |
1269 | struct sim_inferior_data *sim_data | |
1270 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
1271 | ||
1272 | if (!sim_data->program_loaded) | |
57810aa7 | 1273 | return false; |
0c012db1 | 1274 | |
57810aa7 | 1275 | return true; |
0c012db1 KB |
1276 | } |
1277 | ||
57810aa7 | 1278 | bool |
f6ac5f3d | 1279 | gdbsim_target::has_memory () |
0c012db1 KB |
1280 | { |
1281 | struct sim_inferior_data *sim_data | |
1282 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
1283 | ||
1284 | if (!sim_data->program_loaded) | |
57810aa7 | 1285 | return false; |
0c012db1 | 1286 | |
57810aa7 | 1287 | return true; |
0c012db1 KB |
1288 | } |
1289 | ||
6c265988 | 1290 | void _initialize_remote_sim (); |
c906108c | 1291 | void |
6c265988 | 1292 | _initialize_remote_sim () |
c906108c | 1293 | { |
56a9aa1d MF |
1294 | struct cmd_list_element *c; |
1295 | ||
d9f719f1 | 1296 | add_target (gdbsim_target_info, gdbsim_target_open); |
c906108c | 1297 | |
56a9aa1d MF |
1298 | c = add_com ("sim", class_obscure, simulator_command, |
1299 | _("Send a command to the simulator.")); | |
1300 | set_cmd_completer (c, sim_command_completer); | |
c906108c | 1301 | } |