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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 | ||
db04efe6 KB |
192 | /* Flags indicating whether or not a sim instance is needed. One of these |
193 | flags should be passed to get_sim_inferior_data(). */ | |
194 | ||
195 | enum {SIM_INSTANCE_NOT_NEEDED = 0, SIM_INSTANCE_NEEDED = 1}; | |
196 | ||
197 | /* Obtain pointer to per-inferior simulator data, allocating it if necessary. | |
198 | Attempt to open the sim if SIM_INSTANCE_NEEDED is true. */ | |
199 | ||
200 | static struct sim_inferior_data * | |
201 | get_sim_inferior_data (struct inferior *inf, int sim_instance_needed) | |
202 | { | |
203 | SIM_DESC sim_desc = NULL; | |
18101a35 | 204 | struct sim_inferior_data *sim_data = sim_inferior_data_key.get (inf); |
db04efe6 KB |
205 | |
206 | /* Try to allocate a new sim instance, if needed. We do this ahead of | |
207 | a potential allocation of a sim_inferior_data struct in order to | |
208 | avoid needlessly allocating that struct in the event that the sim | |
209 | instance allocation fails. */ | |
74228e77 | 210 | if (sim_instance_needed == SIM_INSTANCE_NEEDED |
db04efe6 KB |
211 | && (sim_data == NULL || sim_data->gdbsim_desc == NULL)) |
212 | { | |
db04efe6 KB |
213 | sim_desc = sim_open (SIM_OPEN_DEBUG, &gdb_callback, exec_bfd, sim_argv); |
214 | if (sim_desc == NULL) | |
215 | error (_("Unable to create simulator instance for inferior %d."), | |
216 | inf->num); | |
217 | ||
b3ee6dd9 SM |
218 | /* Check if the sim descriptor is the same as that of another |
219 | inferior. */ | |
220 | for (inferior *other_inf : all_inferiors ()) | |
db04efe6 | 221 | { |
b3ee6dd9 SM |
222 | sim_inferior_data *other_sim_data |
223 | = sim_inferior_data_key.get (other_inf); | |
224 | ||
225 | if (other_sim_data != NULL | |
226 | && other_sim_data->gdbsim_desc == sim_desc) | |
227 | { | |
228 | /* We don't close the descriptor due to the fact that it's | |
229 | shared with some other inferior. If we were to close it, | |
230 | that might needlessly muck up the other inferior. Of | |
231 | course, it's possible that the damage has already been | |
232 | done... Note that it *will* ultimately be closed during | |
233 | cleanup of the other inferior. */ | |
234 | sim_desc = NULL; | |
235 | error ( | |
236 | _("Inferior %d and inferior %d would have identical simulator state.\n" | |
237 | "(This simulator does not support the running of more than one inferior.)"), | |
238 | inf->num, other_inf->num); | |
239 | } | |
74228e77 | 240 | } |
db04efe6 KB |
241 | } |
242 | ||
243 | if (sim_data == NULL) | |
244 | { | |
18101a35 | 245 | sim_data = sim_inferior_data_key.emplace (inf, sim_desc); |
db04efe6 KB |
246 | } |
247 | else if (sim_desc) | |
248 | { | |
249 | /* This handles the case where sim_data was allocated prior to | |
74228e77 | 250 | needing a sim instance. */ |
db04efe6 KB |
251 | sim_data->gdbsim_desc = sim_desc; |
252 | } | |
c906108c | 253 | |
c906108c | 254 | |
db04efe6 KB |
255 | return sim_data; |
256 | } | |
257 | ||
258 | /* Return pointer to per-inferior simulator data using PTID to find the | |
259 | inferior in question. Return NULL when no inferior is found or | |
260 | when ptid has a zero or negative pid component. */ | |
261 | ||
e0037b4c SM |
262 | sim_inferior_data * |
263 | gdbsim_target::get_inferior_data_by_ptid (ptid_t ptid, | |
264 | int sim_instance_needed) | |
db04efe6 KB |
265 | { |
266 | struct inferior *inf; | |
e99b03dc | 267 | int pid = ptid.pid (); |
db04efe6 KB |
268 | |
269 | if (pid <= 0) | |
270 | return NULL; | |
74228e77 | 271 | |
e0037b4c | 272 | inf = find_inferior_pid (this, pid); |
db04efe6 KB |
273 | |
274 | if (inf) | |
275 | return get_sim_inferior_data (inf, sim_instance_needed); | |
276 | else | |
277 | return NULL; | |
278 | } | |
279 | ||
280 | /* Free the per-inferior simulator data. */ | |
281 | ||
18101a35 | 282 | sim_inferior_data::~sim_inferior_data () |
db04efe6 | 283 | { |
18101a35 TT |
284 | if (gdbsim_desc) |
285 | sim_close (gdbsim_desc, 0); | |
db04efe6 | 286 | } |
9de2bdd7 | 287 | |
c906108c | 288 | static void |
146ec4db | 289 | dump_mem (const gdb_byte *buf, int len) |
c906108c | 290 | { |
1385f66c | 291 | fputs_unfiltered ("\t", gdb_stdlog); |
3d468296 AB |
292 | |
293 | if (len == 8 || len == 4) | |
c906108c | 294 | { |
3d468296 | 295 | uint32_t l[2]; |
123f5f96 | 296 | |
3d468296 | 297 | memcpy (l, buf, len); |
1385f66c | 298 | fprintf_unfiltered (gdb_stdlog, "0x%08x", l[0]); |
3d468296 | 299 | if (len == 8) |
1385f66c | 300 | fprintf_unfiltered (gdb_stdlog, " 0x%08x", l[1]); |
3d468296 AB |
301 | } |
302 | else | |
303 | { | |
304 | int i; | |
123f5f96 | 305 | |
3d468296 | 306 | for (i = 0; i < len; i++) |
1385f66c | 307 | fprintf_unfiltered (gdb_stdlog, "0x%02x ", buf[i]); |
c906108c | 308 | } |
3d468296 | 309 | |
1385f66c | 310 | fputs_unfiltered ("\n", gdb_stdlog); |
c906108c SS |
311 | } |
312 | ||
c906108c SS |
313 | /* Initialize gdb_callback. */ |
314 | ||
315 | static void | |
fba45db2 | 316 | init_callbacks (void) |
c906108c | 317 | { |
c5aa993b | 318 | if (!callbacks_initialized) |
c906108c SS |
319 | { |
320 | gdb_callback = default_callback; | |
321 | gdb_callback.init (&gdb_callback); | |
322 | gdb_callback.write_stdout = gdb_os_write_stdout; | |
323 | gdb_callback.flush_stdout = gdb_os_flush_stdout; | |
324 | gdb_callback.write_stderr = gdb_os_write_stderr; | |
325 | gdb_callback.flush_stderr = gdb_os_flush_stderr; | |
326 | gdb_callback.printf_filtered = gdb_os_printf_filtered; | |
327 | gdb_callback.vprintf_filtered = gdb_os_vprintf_filtered; | |
328 | gdb_callback.evprintf_filtered = gdb_os_evprintf_filtered; | |
329 | gdb_callback.error = gdb_os_error; | |
330 | gdb_callback.poll_quit = gdb_os_poll_quit; | |
331 | gdb_callback.magic = HOST_CALLBACK_MAGIC; | |
332 | callbacks_initialized = 1; | |
333 | } | |
334 | } | |
335 | ||
336 | /* Release callbacks (free resources used by them). */ | |
337 | ||
338 | static void | |
fba45db2 | 339 | end_callbacks (void) |
c906108c SS |
340 | { |
341 | if (callbacks_initialized) | |
342 | { | |
343 | gdb_callback.shutdown (&gdb_callback); | |
344 | callbacks_initialized = 0; | |
345 | } | |
346 | } | |
347 | ||
348 | /* GDB version of os_write_stdout callback. */ | |
349 | ||
c5aa993b | 350 | static int |
fba45db2 | 351 | gdb_os_write_stdout (host_callback *p, const char *buf, int len) |
c906108c | 352 | { |
d9fcf2fb | 353 | ui_file_write (gdb_stdtarg, buf, len); |
c906108c SS |
354 | return len; |
355 | } | |
356 | ||
357 | /* GDB version of os_flush_stdout callback. */ | |
358 | ||
359 | static void | |
fba45db2 | 360 | gdb_os_flush_stdout (host_callback *p) |
c906108c | 361 | { |
4ce44c66 | 362 | gdb_flush (gdb_stdtarg); |
c906108c SS |
363 | } |
364 | ||
365 | /* GDB version of os_write_stderr callback. */ | |
366 | ||
c5aa993b | 367 | static int |
fba45db2 | 368 | gdb_os_write_stderr (host_callback *p, const char *buf, int len) |
c906108c SS |
369 | { |
370 | int i; | |
371 | char b[2]; | |
372 | ||
c5aa993b | 373 | for (i = 0; i < len; i++) |
c906108c SS |
374 | { |
375 | b[0] = buf[i]; | |
376 | b[1] = 0; | |
22e8e3c7 | 377 | fputs_unfiltered (b, gdb_stdtargerr); |
c906108c SS |
378 | } |
379 | return len; | |
380 | } | |
381 | ||
382 | /* GDB version of os_flush_stderr callback. */ | |
383 | ||
384 | static void | |
fba45db2 | 385 | gdb_os_flush_stderr (host_callback *p) |
c906108c | 386 | { |
22e8e3c7 | 387 | gdb_flush (gdb_stdtargerr); |
c906108c SS |
388 | } |
389 | ||
390 | /* GDB version of printf_filtered callback. */ | |
391 | ||
7104e59b SM |
392 | static void ATTRIBUTE_PRINTF (2, 3) |
393 | gdb_os_printf_filtered (host_callback * p, const char *format, ...) | |
c906108c SS |
394 | { |
395 | va_list args; | |
c906108c | 396 | |
123f5f96 | 397 | va_start (args, format); |
c906108c | 398 | vfprintf_filtered (gdb_stdout, format, args); |
c906108c SS |
399 | va_end (args); |
400 | } | |
401 | ||
402 | /* GDB version of error vprintf_filtered. */ | |
403 | ||
7104e59b | 404 | static void ATTRIBUTE_PRINTF (2, 0) |
c5aa993b | 405 | gdb_os_vprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c SS |
406 | { |
407 | vfprintf_filtered (gdb_stdout, format, ap); | |
408 | } | |
409 | ||
410 | /* GDB version of error evprintf_filtered. */ | |
411 | ||
7104e59b | 412 | static void ATTRIBUTE_PRINTF (2, 0) |
c5aa993b | 413 | gdb_os_evprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c SS |
414 | { |
415 | vfprintf_filtered (gdb_stderr, format, ap); | |
416 | } | |
417 | ||
418 | /* GDB version of error callback. */ | |
419 | ||
7104e59b | 420 | static void ATTRIBUTE_PRINTF (2, 3) |
58d4abe1 | 421 | gdb_os_error (host_callback * p, const char *format, ...) |
c906108c | 422 | { |
58d4abe1 | 423 | va_list args; |
123f5f96 | 424 | |
58d4abe1 PA |
425 | va_start (args, format); |
426 | verror (format, args); | |
427 | va_end (args); | |
c906108c SS |
428 | } |
429 | ||
8238d0bf | 430 | int |
e7faf938 | 431 | one2one_register_sim_regno (struct gdbarch *gdbarch, int regnum) |
8238d0bf AC |
432 | { |
433 | /* Only makes sense to supply raw registers. */ | |
e7faf938 | 434 | gdb_assert (regnum >= 0 && regnum < gdbarch_num_regs (gdbarch)); |
8238d0bf AC |
435 | return regnum; |
436 | } | |
437 | ||
f6ac5f3d PA |
438 | void |
439 | gdbsim_target::fetch_registers (struct regcache *regcache, int regno) | |
c906108c | 440 | { |
ac7936df | 441 | struct gdbarch *gdbarch = regcache->arch (); |
e0037b4c | 442 | struct inferior *inf = find_inferior_ptid (this, regcache->ptid ()); |
db04efe6 | 443 | struct sim_inferior_data *sim_data |
bcc0c096 | 444 | = get_sim_inferior_data (inf, SIM_INSTANCE_NEEDED); |
123f5f96 | 445 | |
c5aa993b | 446 | if (regno == -1) |
c906108c | 447 | { |
40a6adc1 | 448 | for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++) |
f6ac5f3d | 449 | fetch_registers (regcache, regno); |
8238d0bf | 450 | return; |
c906108c | 451 | } |
8238d0bf | 452 | |
40a6adc1 | 453 | switch (gdbarch_register_sim_regno (gdbarch, regno)) |
c906108c | 454 | { |
8238d0bf AC |
455 | case LEGACY_SIM_REGNO_IGNORE: |
456 | break; | |
457 | case SIM_REGNO_DOES_NOT_EXIST: | |
458 | { | |
459 | /* For moment treat a `does not exist' register the same way | |
74228e77 | 460 | as an ``unavailable'' register. */ |
a4d1e79a | 461 | regcache->raw_supply_zeroed (regno); |
8238d0bf AC |
462 | break; |
463 | } | |
74228e77 | 464 | |
8238d0bf AC |
465 | default: |
466 | { | |
467 | static int warn_user = 1; | |
a4d1e79a AH |
468 | int regsize = register_size (gdbarch, regno); |
469 | gdb::byte_vector buf (regsize, 0); | |
8238d0bf | 470 | int nr_bytes; |
123f5f96 | 471 | |
40a6adc1 | 472 | gdb_assert (regno >= 0 && regno < gdbarch_num_regs (gdbarch)); |
db04efe6 | 473 | nr_bytes = sim_fetch_register (sim_data->gdbsim_desc, |
474c1661 | 474 | gdbarch_register_sim_regno |
40a6adc1 | 475 | (gdbarch, regno), |
a4d1e79a AH |
476 | buf.data (), regsize); |
477 | if (nr_bytes > 0 && nr_bytes != regsize && warn_user) | |
8238d0bf AC |
478 | { |
479 | fprintf_unfiltered (gdb_stderr, | |
0df8b418 MS |
480 | "Size of register %s (%d/%d) " |
481 | "incorrect (%d instead of %d))", | |
40a6adc1 | 482 | gdbarch_register_name (gdbarch, regno), |
474c1661 | 483 | regno, |
a4d1e79a AH |
484 | gdbarch_register_sim_regno (gdbarch, regno), |
485 | nr_bytes, regsize); | |
8238d0bf AC |
486 | warn_user = 0; |
487 | } | |
488 | /* FIXME: cagney/2002-05-27: Should check `nr_bytes == 0' | |
278a7cf7 | 489 | indicating that GDB and the SIM have different ideas about |
8238d0bf AC |
490 | which registers are fetchable. */ |
491 | /* Else if (nr_bytes < 0): an old simulator, that doesn't | |
492 | think to return the register size. Just assume all is ok. */ | |
a4d1e79a | 493 | regcache->raw_supply (regno, buf.data ()); |
ea35711c | 494 | if (remote_debug) |
8238d0bf | 495 | { |
1385f66c PA |
496 | fprintf_unfiltered (gdb_stdlog, |
497 | "gdbsim_fetch_register: %d", regno); | |
8238d0bf | 498 | /* FIXME: We could print something more intelligible. */ |
a4d1e79a | 499 | dump_mem (buf.data (), regsize); |
8238d0bf AC |
500 | } |
501 | break; | |
502 | } | |
c906108c SS |
503 | } |
504 | } | |
505 | ||
506 | ||
f6ac5f3d PA |
507 | void |
508 | gdbsim_target::store_registers (struct regcache *regcache, int regno) | |
c906108c | 509 | { |
ac7936df | 510 | struct gdbarch *gdbarch = regcache->arch (); |
e0037b4c | 511 | struct inferior *inf = find_inferior_ptid (this, regcache->ptid ()); |
db04efe6 | 512 | struct sim_inferior_data *sim_data |
bcc0c096 | 513 | = get_sim_inferior_data (inf, SIM_INSTANCE_NEEDED); |
db04efe6 | 514 | |
c5aa993b | 515 | if (regno == -1) |
c906108c | 516 | { |
40a6adc1 | 517 | for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++) |
f6ac5f3d | 518 | store_registers (regcache, regno); |
8238d0bf | 519 | return; |
c906108c | 520 | } |
40a6adc1 | 521 | else if (gdbarch_register_sim_regno (gdbarch, regno) >= 0) |
c906108c | 522 | { |
a4d1e79a AH |
523 | int regsize = register_size (gdbarch, regno); |
524 | gdb::byte_vector tmp (regsize); | |
c906108c | 525 | int nr_bytes; |
123f5f96 | 526 | |
a4d1e79a | 527 | regcache->cooked_read (regno, tmp.data ()); |
db04efe6 | 528 | nr_bytes = sim_store_register (sim_data->gdbsim_desc, |
474c1661 | 529 | gdbarch_register_sim_regno |
40a6adc1 | 530 | (gdbarch, regno), |
a4d1e79a AH |
531 | tmp.data (), regsize); |
532 | ||
533 | if (nr_bytes > 0 && nr_bytes != regsize) | |
8e65ff28 | 534 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 535 | _("Register size different to expected")); |
dae477fe | 536 | if (nr_bytes < 0) |
74228e77 RM |
537 | internal_error (__FILE__, __LINE__, |
538 | _("Register %d not updated"), regno); | |
dae477fe | 539 | if (nr_bytes == 0) |
74228e77 RM |
540 | warning (_("Register %s not updated"), |
541 | gdbarch_register_name (gdbarch, regno)); | |
dae477fe | 542 | |
ea35711c | 543 | if (remote_debug) |
c906108c | 544 | { |
1385f66c | 545 | fprintf_unfiltered (gdb_stdlog, "gdbsim_store_register: %d", regno); |
c906108c | 546 | /* FIXME: We could print something more intelligible. */ |
a4d1e79a | 547 | dump_mem (tmp.data (), regsize); |
c906108c SS |
548 | } |
549 | } | |
550 | } | |
551 | ||
552 | /* Kill the running program. This may involve closing any open files | |
553 | and releasing other resources acquired by the simulated program. */ | |
554 | ||
f6ac5f3d PA |
555 | void |
556 | gdbsim_target::kill () | |
c906108c | 557 | { |
ea35711c | 558 | if (remote_debug) |
1385f66c | 559 | fprintf_unfiltered (gdb_stdlog, "gdbsim_kill\n"); |
c906108c SS |
560 | |
561 | /* There is no need to `kill' running simulator - the simulator is | |
52bb452f | 562 | not running. Mourning it is enough. */ |
bc1e6c81 | 563 | target_mourn_inferior (inferior_ptid); |
c906108c SS |
564 | } |
565 | ||
566 | /* Load an executable file into the target process. This is expected to | |
567 | not only bring new code into the target process, but also to update | |
568 | GDB's symbol tables to match. */ | |
569 | ||
f6ac5f3d PA |
570 | void |
571 | gdbsim_target::load (const char *args, int fromtty) | |
c906108c | 572 | { |
b2b255bd | 573 | const char *prog; |
db04efe6 KB |
574 | struct sim_inferior_data *sim_data |
575 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NEEDED); | |
1986bccd | 576 | |
d1a41061 PP |
577 | if (args == NULL) |
578 | error_no_arg (_("program to load")); | |
1986bccd | 579 | |
773a1edc | 580 | gdb_argv argv (args); |
1986bccd AS |
581 | |
582 | prog = tilde_expand (argv[0]); | |
583 | ||
584 | if (argv[1] != NULL) | |
585 | error (_("GDB sim does not yet support a load offset.")); | |
586 | ||
ea35711c | 587 | if (remote_debug) |
1385f66c | 588 | fprintf_unfiltered (gdb_stdlog, "gdbsim_load: prog \"%s\"\n", prog); |
c906108c | 589 | |
c906108c SS |
590 | /* FIXME: We will print two messages on error. |
591 | Need error to either not print anything if passed NULL or need | |
592 | another routine that doesn't take any arguments. */ | |
db04efe6 | 593 | if (sim_load (sim_data->gdbsim_desc, prog, NULL, fromtty) == SIM_RC_FAIL) |
8a3fe4f8 | 594 | error (_("unable to load program")); |
c906108c SS |
595 | |
596 | /* FIXME: If a load command should reset the targets registers then | |
0df8b418 | 597 | a call to sim_create_inferior() should go here. */ |
c906108c | 598 | |
db04efe6 | 599 | sim_data->program_loaded = 1; |
c906108c SS |
600 | } |
601 | ||
602 | ||
39f77062 | 603 | /* Start an inferior process and set inferior_ptid to its pid. |
c906108c SS |
604 | EXEC_FILE is the file to run. |
605 | ARGS is a string containing the arguments to the program. | |
606 | ENV is the environment vector to pass. Errors reported with error(). | |
607 | On VxWorks and various standalone systems, we ignore exec_file. */ | |
608 | /* This is called not only when we first attach, but also when the | |
609 | user types "run" after having attached. */ | |
610 | ||
f6ac5f3d PA |
611 | void |
612 | gdbsim_target::create_inferior (const char *exec_file, | |
613 | const std::string &allargs, | |
614 | char **env, int from_tty) | |
c906108c | 615 | { |
db04efe6 KB |
616 | struct sim_inferior_data *sim_data |
617 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NEEDED); | |
c906108c | 618 | int len; |
773a1edc | 619 | char *arg_buf; |
7c5ded6a | 620 | const char *args = allargs.c_str (); |
c906108c SS |
621 | |
622 | if (exec_file == 0 || exec_bfd == 0) | |
8a3fe4f8 | 623 | warning (_("No executable file specified.")); |
db04efe6 | 624 | if (!sim_data->program_loaded) |
8a3fe4f8 | 625 | warning (_("No program loaded.")); |
c906108c | 626 | |
ea35711c | 627 | if (remote_debug) |
1385f66c PA |
628 | fprintf_unfiltered (gdb_stdlog, |
629 | "gdbsim_create_inferior: exec_file \"%s\", args \"%s\"\n", | |
630 | (exec_file ? exec_file : "(NULL)"), | |
631 | args); | |
c906108c | 632 | |
d7e15655 | 633 | if (inferior_ptid == sim_data->remote_sim_ptid) |
f6ac5f3d | 634 | kill (); |
c906108c SS |
635 | remove_breakpoints (); |
636 | init_wait_for_inferior (); | |
637 | ||
773a1edc | 638 | gdb_argv built_argv; |
c906108c SS |
639 | if (exec_file != NULL) |
640 | { | |
7c5ded6a | 641 | len = strlen (exec_file) + 1 + allargs.size () + 1 + /*slop */ 10; |
c906108c SS |
642 | arg_buf = (char *) alloca (len); |
643 | arg_buf[0] = '\0'; | |
644 | strcat (arg_buf, exec_file); | |
645 | strcat (arg_buf, " "); | |
646 | strcat (arg_buf, args); | |
773a1edc | 647 | built_argv.reset (arg_buf); |
c906108c | 648 | } |
ddd60447 | 649 | |
773a1edc TT |
650 | if (sim_create_inferior (sim_data->gdbsim_desc, exec_bfd, |
651 | built_argv.get (), env) | |
ddd60447 MF |
652 | != SIM_RC_OK) |
653 | error (_("Unable to create sim inferior.")); | |
c906108c | 654 | |
db04efe6 | 655 | inferior_ptid = sim_data->remote_sim_ptid; |
e99b03dc | 656 | inferior_appeared (current_inferior (), inferior_ptid.pid ()); |
e0037b4c | 657 | add_thread_silent (this, inferior_ptid); |
9de2bdd7 | 658 | |
0df8b418 MS |
659 | insert_breakpoints (); /* Needed to get correct instruction |
660 | in cache. */ | |
c906108c | 661 | |
88056fbb | 662 | clear_proceed_status (0); |
c906108c SS |
663 | } |
664 | ||
665 | /* The open routine takes the rest of the parameters from the command, | |
666 | and (if successful) pushes a new target onto the stack. | |
667 | Targets should supply this routine, if only to provide an error message. */ | |
0df8b418 | 668 | /* Called when selecting the simulator. E.g. (gdb) target sim name. */ |
c906108c | 669 | |
d9f719f1 PA |
670 | static void |
671 | gdbsim_target_open (const char *args, int from_tty) | |
c906108c SS |
672 | { |
673 | int len; | |
674 | char *arg_buf; | |
db04efe6 | 675 | struct sim_inferior_data *sim_data; |
87d1b309 | 676 | const char *sysroot; |
db04efe6 | 677 | SIM_DESC gdbsim_desc; |
c906108c | 678 | |
87d1b309 MF |
679 | sysroot = gdb_sysroot; |
680 | if (is_target_filename (sysroot)) | |
681 | sysroot += strlen (TARGET_SYSROOT_PREFIX); | |
682 | ||
ea35711c | 683 | if (remote_debug) |
1385f66c PA |
684 | fprintf_unfiltered (gdb_stdlog, |
685 | "gdbsim_open: args \"%s\"\n", args ? args : "(null)"); | |
c906108c | 686 | |
db04efe6 KB |
687 | /* Ensure that the sim target is not on the target stack. This is |
688 | necessary, because if it is on the target stack, the call to | |
689 | push_target below will invoke sim_close(), thus freeing various | |
690 | state (including a sim instance) that we allocate prior to | |
691 | invoking push_target(). We want to delay the push_target() | |
692 | operation until after we complete those operations which could | |
693 | error out. */ | |
694 | if (gdbsim_is_open) | |
c906108c SS |
695 | unpush_target (&gdbsim_ops); |
696 | ||
c5aa993b | 697 | len = (7 + 1 /* gdbsim */ |
c906108c SS |
698 | + strlen (" -E little") |
699 | + strlen (" --architecture=xxxxxxxxxx") | |
23bf70af | 700 | + strlen (" --sysroot=") + strlen (sysroot) + |
c906108c | 701 | + (args ? strlen (args) : 0) |
c5aa993b | 702 | + 50) /* slack */ ; |
c906108c | 703 | arg_buf = (char *) alloca (len); |
c5aa993b | 704 | strcpy (arg_buf, "gdbsim"); /* 7 */ |
b6d373df | 705 | /* Specify the byte order for the target when it is explicitly |
0df8b418 | 706 | specified by the user (not auto detected). */ |
b6d373df | 707 | switch (selected_byte_order ()) |
c906108c | 708 | { |
a8cf2722 AC |
709 | case BFD_ENDIAN_BIG: |
710 | strcat (arg_buf, " -E big"); | |
711 | break; | |
712 | case BFD_ENDIAN_LITTLE: | |
713 | strcat (arg_buf, " -E little"); | |
714 | break; | |
715 | case BFD_ENDIAN_UNKNOWN: | |
716 | break; | |
c906108c SS |
717 | } |
718 | /* Specify the architecture of the target when it has been | |
719 | explicitly specified */ | |
a8cf2722 | 720 | if (selected_architecture_name () != NULL) |
c906108c SS |
721 | { |
722 | strcat (arg_buf, " --architecture="); | |
a8cf2722 | 723 | strcat (arg_buf, selected_architecture_name ()); |
c906108c | 724 | } |
f4b8c29b MF |
725 | /* Pass along gdb's concept of the sysroot. */ |
726 | strcat (arg_buf, " --sysroot="); | |
23bf70af | 727 | strcat (arg_buf, sysroot); |
c906108c SS |
728 | /* finally, any explicit args */ |
729 | if (args) | |
730 | { | |
c5aa993b | 731 | strcat (arg_buf, " "); /* 1 */ |
c906108c SS |
732 | strcat (arg_buf, args); |
733 | } | |
773a1edc | 734 | |
74cbb09e | 735 | gdb_argv argv (arg_buf); |
67a3048c | 736 | sim_argv = argv.release (); |
c906108c SS |
737 | |
738 | init_callbacks (); | |
db04efe6 | 739 | gdbsim_desc = sim_open (SIM_OPEN_DEBUG, &gdb_callback, exec_bfd, sim_argv); |
c906108c SS |
740 | |
741 | if (gdbsim_desc == 0) | |
db04efe6 | 742 | { |
67a3048c | 743 | freeargv (sim_argv); |
db04efe6 KB |
744 | sim_argv = NULL; |
745 | error (_("unable to create simulator instance")); | |
746 | } | |
747 | ||
748 | /* Reset the pid numberings for this batch of sim instances. */ | |
749 | next_pid = INITIAL_PID; | |
750 | ||
751 | /* Allocate the inferior data, but do not allocate a sim instance | |
752 | since we've already just done that. */ | |
0df8b418 MS |
753 | sim_data = get_sim_inferior_data (current_inferior (), |
754 | SIM_INSTANCE_NOT_NEEDED); | |
db04efe6 KB |
755 | |
756 | sim_data->gdbsim_desc = gdbsim_desc; | |
c906108c SS |
757 | |
758 | push_target (&gdbsim_ops); | |
c906108c | 759 | printf_filtered ("Connected to the simulator.\n"); |
52bb452f DJ |
760 | |
761 | /* There's nothing running after "target sim" or "load"; not until | |
762 | "run". */ | |
763 | inferior_ptid = null_ptid; | |
db04efe6 KB |
764 | |
765 | gdbsim_is_open = 1; | |
766 | } | |
767 | ||
e0037b4c | 768 | /* Helper for gdbsim_target::close. */ |
db04efe6 | 769 | |
e0037b4c SM |
770 | void |
771 | gdbsim_target::close_one_inferior (inferior *inf) | |
db04efe6 | 772 | { |
18101a35 | 773 | struct sim_inferior_data *sim_data = sim_inferior_data_key.get (inf); |
db04efe6 KB |
774 | if (sim_data != NULL) |
775 | { | |
776 | ptid_t ptid = sim_data->remote_sim_ptid; | |
777 | ||
18101a35 | 778 | sim_inferior_data_key.clear (inf); |
db04efe6 KB |
779 | |
780 | /* Having a ptid allocated and stored in remote_sim_ptid does | |
0df8b418 | 781 | not mean that a corresponding inferior was ever created. |
db04efe6 KB |
782 | Thus we need to verify the existence of an inferior using the |
783 | pid in question before setting inferior_ptid via | |
784 | switch_to_thread() or mourning the inferior. */ | |
e0037b4c | 785 | if (find_inferior_ptid (this, ptid) != NULL) |
db04efe6 | 786 | { |
e0037b4c | 787 | switch_to_thread (this, ptid); |
db04efe6 KB |
788 | generic_mourn_inferior (); |
789 | } | |
790 | } | |
c906108c SS |
791 | } |
792 | ||
0df8b418 | 793 | /* Close out all files and local state before this target loses control. */ |
c906108c | 794 | |
f6ac5f3d PA |
795 | void |
796 | gdbsim_target::close () | |
c906108c | 797 | { |
ea35711c | 798 | if (remote_debug) |
1385f66c | 799 | fprintf_unfiltered (gdb_stdlog, "gdbsim_close\n"); |
c906108c | 800 | |
e0037b4c SM |
801 | for (inferior *inf : all_inferiors (this)) |
802 | close_one_inferior (inf); | |
c906108c | 803 | |
db04efe6 | 804 | if (sim_argv != NULL) |
c906108c | 805 | { |
db04efe6 KB |
806 | freeargv (sim_argv); |
807 | sim_argv = NULL; | |
c906108c SS |
808 | } |
809 | ||
810 | end_callbacks (); | |
db04efe6 KB |
811 | |
812 | gdbsim_is_open = 0; | |
c906108c SS |
813 | } |
814 | ||
815 | /* Takes a program previously attached to and detaches it. | |
816 | The program may resume execution (some targets do, some don't) and will | |
817 | no longer stop on signals, etc. We better not have left any breakpoints | |
6bd6f3b6 SM |
818 | in the program or it'll die when it hits one. FROM_TTY says whether to be |
819 | verbose or not. */ | |
c906108c SS |
820 | /* Terminate the open connection to the remote debugger. |
821 | Use this when you want to detach and do something else with your gdb. */ | |
822 | ||
f6ac5f3d PA |
823 | void |
824 | gdbsim_target::detach (inferior *inf, int from_tty) | |
c906108c | 825 | { |
ea35711c | 826 | if (remote_debug) |
6bd6f3b6 | 827 | fprintf_unfiltered (gdb_stdlog, "gdbsim_detach\n"); |
c906108c | 828 | |
f6ac5f3d | 829 | unpush_target (this); /* calls gdbsim_close to do the real work */ |
c906108c SS |
830 | if (from_tty) |
831 | printf_filtered ("Ending simulator %s debugging\n", target_shortname); | |
832 | } | |
c5aa993b | 833 | |
c906108c SS |
834 | /* Resume execution of the target process. STEP says whether to single-step |
835 | or to run free; SIGGNAL is the signal value (e.g. SIGINT) to be given | |
836 | to the target, or zero for no signal. */ | |
837 | ||
e0037b4c SM |
838 | void |
839 | gdbsim_target::resume_one_inferior (inferior *inf, bool step, | |
840 | gdb_signal siggnal) | |
db04efe6 KB |
841 | { |
842 | struct sim_inferior_data *sim_data | |
843 | = get_sim_inferior_data (inf, SIM_INSTANCE_NOT_NEEDED); | |
db04efe6 KB |
844 | |
845 | if (sim_data) | |
846 | { | |
e0037b4c SM |
847 | sim_data->resume_siggnal = siggnal; |
848 | sim_data->resume_step = step; | |
db04efe6 KB |
849 | |
850 | if (remote_debug) | |
1385f66c PA |
851 | fprintf_unfiltered (gdb_stdlog, |
852 | _("gdbsim_resume: pid %d, step %d, signal %d\n"), | |
e0037b4c | 853 | inf->pid, step, siggnal); |
db04efe6 | 854 | } |
db04efe6 | 855 | } |
c906108c | 856 | |
f6ac5f3d PA |
857 | void |
858 | gdbsim_target::resume (ptid_t ptid, int step, enum gdb_signal siggnal) | |
c906108c | 859 | { |
db04efe6 | 860 | struct sim_inferior_data *sim_data |
e0037b4c | 861 | = get_inferior_data_by_ptid (ptid, SIM_INSTANCE_NOT_NEEDED); |
db04efe6 | 862 | |
0df8b418 | 863 | /* We don't access any sim_data members within this function. |
db04efe6 KB |
864 | What's of interest is whether or not the call to |
865 | get_sim_inferior_data_by_ptid(), above, is able to obtain a | |
866 | non-NULL pointer. If it managed to obtain a non-NULL pointer, we | |
867 | know we have a single inferior to consider. If it's NULL, we | |
868 | either have multiple inferiors to resume or an error condition. */ | |
869 | ||
870 | if (sim_data) | |
e0037b4c | 871 | resume_one_inferior (find_inferior_ptid (this, ptid), step, siggnal); |
d7e15655 | 872 | else if (ptid == minus_one_ptid) |
e0037b4c SM |
873 | { |
874 | for (inferior *inf : all_inferiors (this)) | |
875 | resume_one_inferior (inf, step, siggnal); | |
876 | } | |
db04efe6 | 877 | else |
8a3fe4f8 | 878 | error (_("The program is not being run.")); |
c906108c SS |
879 | } |
880 | ||
bfedc46a | 881 | /* Notify the simulator of an asynchronous request to interrupt. |
c5aa993b | 882 | |
bfedc46a | 883 | The simulator shall ensure that the interrupt request is eventually |
c906108c | 884 | delivered to the simulator. If the call is made while the |
bfedc46a | 885 | simulator is not running then the interrupt request is processed when |
c906108c SS |
886 | the simulator is next resumed. |
887 | ||
db04efe6 KB |
888 | For simulators that do not support this operation, just abort. */ |
889 | ||
b3ee6dd9 SM |
890 | void |
891 | gdbsim_target::interrupt () | |
db04efe6 | 892 | { |
b3ee6dd9 | 893 | for (inferior *inf : all_inferiors ()) |
db04efe6 | 894 | { |
b3ee6dd9 SM |
895 | sim_inferior_data *sim_data |
896 | = get_sim_inferior_data (inf, SIM_INSTANCE_NEEDED); | |
897 | ||
898 | if (sim_data != nullptr && !sim_stop (sim_data->gdbsim_desc)) | |
db04efe6 | 899 | quit (); |
db04efe6 | 900 | } |
c906108c SS |
901 | } |
902 | ||
903 | /* GDB version of os_poll_quit callback. | |
8a0ce09a | 904 | Taken from gdb/util.c - should be in a library. */ |
c906108c SS |
905 | |
906 | static int | |
fba45db2 | 907 | gdb_os_poll_quit (host_callback *p) |
c906108c | 908 | { |
98bbd631 AC |
909 | if (deprecated_ui_loop_hook != NULL) |
910 | deprecated_ui_loop_hook (0); | |
7a292a7a | 911 | |
522002f9 | 912 | if (check_quit_flag ()) /* gdb's idea of quit */ |
abf009ef | 913 | return 1; |
c906108c SS |
914 | return 0; |
915 | } | |
916 | ||
917 | /* Wait for inferior process to do something. Return pid of child, | |
918 | or -1 in case of error; store status through argument pointer STATUS, | |
0df8b418 | 919 | just as `wait' would. */ |
c906108c SS |
920 | |
921 | static void | |
fba45db2 | 922 | gdbsim_cntrl_c (int signo) |
c906108c | 923 | { |
f6ac5f3d | 924 | gdbsim_ops.interrupt (); |
c906108c SS |
925 | } |
926 | ||
f6ac5f3d PA |
927 | ptid_t |
928 | gdbsim_target::wait (ptid_t ptid, struct target_waitstatus *status, int options) | |
c906108c | 929 | { |
db04efe6 | 930 | struct sim_inferior_data *sim_data; |
a40805d4 | 931 | static sighandler_t prev_sigint; |
c906108c SS |
932 | int sigrc = 0; |
933 | enum sim_stop reason = sim_running; | |
934 | ||
db04efe6 KB |
935 | /* This target isn't able to (yet) resume more than one inferior at a time. |
936 | When ptid is minus_one_ptid, just use the current inferior. If we're | |
937 | given an explicit pid, we'll try to find it and use that instead. */ | |
d7e15655 | 938 | if (ptid == minus_one_ptid) |
0df8b418 MS |
939 | sim_data = get_sim_inferior_data (current_inferior (), |
940 | SIM_INSTANCE_NEEDED); | |
db04efe6 KB |
941 | else |
942 | { | |
e0037b4c | 943 | sim_data = get_inferior_data_by_ptid (ptid, SIM_INSTANCE_NEEDED); |
db04efe6 KB |
944 | if (sim_data == NULL) |
945 | error (_("Unable to wait for pid %d. Inferior not found."), | |
e99b03dc | 946 | ptid.pid ()); |
db04efe6 KB |
947 | inferior_ptid = ptid; |
948 | } | |
949 | ||
ea35711c | 950 | if (remote_debug) |
1385f66c | 951 | fprintf_unfiltered (gdb_stdlog, "gdbsim_wait\n"); |
c906108c SS |
952 | |
953 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) | |
954 | { | |
955 | struct sigaction sa, osa; | |
956 | sa.sa_handler = gdbsim_cntrl_c; | |
957 | sigemptyset (&sa.sa_mask); | |
958 | sa.sa_flags = 0; | |
959 | sigaction (SIGINT, &sa, &osa); | |
960 | prev_sigint = osa.sa_handler; | |
961 | } | |
962 | #else | |
963 | prev_sigint = signal (SIGINT, gdbsim_cntrl_c); | |
964 | #endif | |
db04efe6 | 965 | sim_resume (sim_data->gdbsim_desc, sim_data->resume_step, |
74228e77 | 966 | sim_data->resume_siggnal); |
db04efe6 | 967 | |
c906108c | 968 | signal (SIGINT, prev_sigint); |
db04efe6 | 969 | sim_data->resume_step = 0; |
c906108c | 970 | |
db04efe6 | 971 | sim_stop_reason (sim_data->gdbsim_desc, &reason, &sigrc); |
c906108c SS |
972 | |
973 | switch (reason) | |
974 | { | |
975 | case sim_exited: | |
976 | status->kind = TARGET_WAITKIND_EXITED; | |
977 | status->value.integer = sigrc; | |
978 | break; | |
979 | case sim_stopped: | |
980 | switch (sigrc) | |
981 | { | |
a493e3e2 | 982 | case GDB_SIGNAL_ABRT: |
c906108c SS |
983 | quit (); |
984 | break; | |
a493e3e2 PA |
985 | case GDB_SIGNAL_INT: |
986 | case GDB_SIGNAL_TRAP: | |
c906108c SS |
987 | default: |
988 | status->kind = TARGET_WAITKIND_STOPPED; | |
653090d3 | 989 | status->value.sig = (enum gdb_signal) sigrc; |
c906108c SS |
990 | break; |
991 | } | |
992 | break; | |
993 | case sim_signalled: | |
994 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
653090d3 | 995 | status->value.sig = (enum gdb_signal) sigrc; |
c906108c SS |
996 | break; |
997 | case sim_running: | |
998 | case sim_polling: | |
0df8b418 | 999 | /* FIXME: Is this correct? */ |
c906108c SS |
1000 | break; |
1001 | } | |
1002 | ||
cf1d9e09 | 1003 | return sim_data->remote_sim_ptid; |
c906108c SS |
1004 | } |
1005 | ||
1006 | /* Get ready to modify the registers array. On machines which store | |
1007 | individual registers, this doesn't need to do anything. On machines | |
1008 | which store all the registers in one fell swoop, this makes sure | |
1009 | that registers contains all the registers from the program being | |
1010 | debugged. */ | |
1011 | ||
f6ac5f3d PA |
1012 | void |
1013 | gdbsim_target::prepare_to_store (struct regcache *regcache) | |
c906108c | 1014 | { |
0df8b418 | 1015 | /* Do nothing, since we can store individual regs. */ |
c906108c SS |
1016 | } |
1017 | ||
146ec4db PA |
1018 | /* Helper for gdbsim_xfer_partial that handles memory transfers. |
1019 | Arguments are like target_xfer_partial. */ | |
d93bce06 | 1020 | |
9b409511 | 1021 | static enum target_xfer_status |
146ec4db PA |
1022 | gdbsim_xfer_memory (struct target_ops *target, |
1023 | gdb_byte *readbuf, const gdb_byte *writebuf, | |
9b409511 | 1024 | ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) |
c906108c | 1025 | { |
db04efe6 KB |
1026 | struct sim_inferior_data *sim_data |
1027 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
b55e14c7 | 1028 | int l; |
db04efe6 | 1029 | |
0c012db1 KB |
1030 | /* If this target doesn't have memory yet, return 0 causing the |
1031 | request to be passed to a lower target, hopefully an exec | |
1032 | file. */ | |
f6ac5f3d | 1033 | if (!target->has_memory ()) |
9b409511 | 1034 | return TARGET_XFER_EOF; |
52bb452f | 1035 | |
db04efe6 | 1036 | if (!sim_data->program_loaded) |
8a3fe4f8 | 1037 | error (_("No program loaded.")); |
c906108c | 1038 | |
db04efe6 KB |
1039 | /* Note that we obtained the sim_data pointer above using |
1040 | SIM_INSTANCE_NOT_NEEDED. We do this so that we don't needlessly | |
1041 | allocate a sim instance prior to loading a program. If we | |
1042 | get to this point in the code though, gdbsim_desc should be | |
1043 | non-NULL. (Note that a sim instance is needed in order to load | |
1044 | the program...) */ | |
1045 | gdb_assert (sim_data->gdbsim_desc != NULL); | |
1046 | ||
ea35711c | 1047 | if (remote_debug) |
fcde0081 | 1048 | fprintf_unfiltered (gdb_stdlog, |
146ec4db PA |
1049 | "gdbsim_xfer_memory: readbuf %s, writebuf %s, " |
1050 | "memaddr %s, len %s\n", | |
1051 | host_address_to_string (readbuf), | |
1052 | host_address_to_string (writebuf), | |
fcde0081 | 1053 | paddress (target_gdbarch (), memaddr), |
b55e14c7 | 1054 | pulongest (len)); |
c906108c | 1055 | |
146ec4db | 1056 | if (writebuf) |
c906108c | 1057 | { |
fcde0081 | 1058 | if (remote_debug && len > 0) |
146ec4db | 1059 | dump_mem (writebuf, len); |
b55e14c7 | 1060 | l = sim_write (sim_data->gdbsim_desc, memaddr, writebuf, len); |
c906108c | 1061 | } |
c5aa993b | 1062 | else |
c906108c | 1063 | { |
b55e14c7 | 1064 | l = sim_read (sim_data->gdbsim_desc, memaddr, readbuf, len); |
ea35711c | 1065 | if (remote_debug && len > 0) |
146ec4db | 1066 | dump_mem (readbuf, len); |
c5aa993b | 1067 | } |
9b409511 YQ |
1068 | if (l > 0) |
1069 | { | |
1070 | *xfered_len = (ULONGEST) l; | |
1071 | return TARGET_XFER_OK; | |
1072 | } | |
1073 | else if (l == 0) | |
1074 | return TARGET_XFER_EOF; | |
1075 | else | |
1076 | return TARGET_XFER_E_IO; | |
c906108c SS |
1077 | } |
1078 | ||
146ec4db PA |
1079 | /* Target to_xfer_partial implementation. */ |
1080 | ||
f6ac5f3d PA |
1081 | enum target_xfer_status |
1082 | gdbsim_target::xfer_partial (enum target_object object, | |
1083 | const char *annex, gdb_byte *readbuf, | |
1084 | const gdb_byte *writebuf, ULONGEST offset, ULONGEST len, | |
1085 | ULONGEST *xfered_len) | |
146ec4db PA |
1086 | { |
1087 | switch (object) | |
1088 | { | |
1089 | case TARGET_OBJECT_MEMORY: | |
f6ac5f3d | 1090 | return gdbsim_xfer_memory (this, readbuf, writebuf, offset, len, |
9b409511 | 1091 | xfered_len); |
146ec4db PA |
1092 | |
1093 | default: | |
2ed4b548 | 1094 | return TARGET_XFER_E_IO; |
146ec4db PA |
1095 | } |
1096 | } | |
1097 | ||
f6ac5f3d PA |
1098 | void |
1099 | gdbsim_target::files_info () | |
c906108c | 1100 | { |
db04efe6 KB |
1101 | struct sim_inferior_data *sim_data |
1102 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NEEDED); | |
0d18d720 | 1103 | const char *file = "nothing"; |
c906108c SS |
1104 | |
1105 | if (exec_bfd) | |
1106 | file = bfd_get_filename (exec_bfd); | |
1107 | ||
ea35711c | 1108 | if (remote_debug) |
1385f66c | 1109 | fprintf_unfiltered (gdb_stdlog, "gdbsim_files_info: file \"%s\"\n", file); |
c906108c SS |
1110 | |
1111 | if (exec_bfd) | |
1112 | { | |
1385f66c PA |
1113 | fprintf_unfiltered (gdb_stdlog, "\tAttached to %s running program %s\n", |
1114 | target_shortname, file); | |
db04efe6 | 1115 | sim_info (sim_data->gdbsim_desc, 0); |
c906108c SS |
1116 | } |
1117 | } | |
1118 | ||
1119 | /* Clear the simulator's notion of what the break points are. */ | |
1120 | ||
f6ac5f3d PA |
1121 | void |
1122 | gdbsim_target::mourn_inferior () | |
c5aa993b | 1123 | { |
ea35711c | 1124 | if (remote_debug) |
1385f66c | 1125 | fprintf_unfiltered (gdb_stdlog, "gdbsim_mourn_inferior:\n"); |
c906108c SS |
1126 | |
1127 | remove_breakpoints (); | |
1128 | generic_mourn_inferior (); | |
1129 | } | |
1130 | ||
c906108c SS |
1131 | /* Pass the command argument through to the simulator verbatim. The |
1132 | simulator must do any command interpretation work. */ | |
1133 | ||
d04afd58 | 1134 | static void |
0b39b52e | 1135 | simulator_command (const char *args, int from_tty) |
c906108c | 1136 | { |
db04efe6 KB |
1137 | struct sim_inferior_data *sim_data; |
1138 | ||
1139 | /* We use inferior_data() instead of get_sim_inferior_data() here in | |
1140 | order to avoid attaching a sim_inferior_data struct to an | |
1141 | inferior unnecessarily. The reason we take such care here is due | |
1142 | to the fact that this function, simulator_command(), may be called | |
1143 | even when the sim target is not active. If we were to use | |
1144 | get_sim_inferior_data() here, it is possible that this call would | |
1145 | be made either prior to gdbsim_open() or after gdbsim_close(), | |
1146 | thus allocating memory that would not be garbage collected until | |
1147 | the ultimate destruction of the associated inferior. */ | |
1148 | ||
18101a35 | 1149 | sim_data = sim_inferior_data_key.get (current_inferior ()); |
db04efe6 | 1150 | if (sim_data == NULL || sim_data->gdbsim_desc == NULL) |
c906108c SS |
1151 | { |
1152 | ||
1153 | /* PREVIOUSLY: The user may give a command before the simulator | |
74228e77 RM |
1154 | is opened. [...] (??? assuming of course one wishes to |
1155 | continue to allow commands to be sent to unopened simulators, | |
1156 | which isn't entirely unreasonable). */ | |
c906108c SS |
1157 | |
1158 | /* The simulator is a builtin abstraction of a remote target. | |
74228e77 RM |
1159 | Consistent with that model, access to the simulator, via sim |
1160 | commands, is restricted to the period when the channel to the | |
1161 | simulator is open. */ | |
c906108c | 1162 | |
8a3fe4f8 | 1163 | error (_("Not connected to the simulator target")); |
c906108c SS |
1164 | } |
1165 | ||
db04efe6 | 1166 | sim_do_command (sim_data->gdbsim_desc, args); |
c906108c SS |
1167 | |
1168 | /* Invalidate the register cache, in case the simulator command does | |
0df8b418 | 1169 | something funny. */ |
c5aa993b | 1170 | registers_changed (); |
c906108c SS |
1171 | } |
1172 | ||
386535dd PA |
1173 | static void |
1174 | sim_command_completer (struct cmd_list_element *ignore, | |
1175 | completion_tracker &tracker, | |
1176 | const char *text, const char *word) | |
56a9aa1d MF |
1177 | { |
1178 | struct sim_inferior_data *sim_data; | |
1179 | ||
18101a35 | 1180 | sim_data = sim_inferior_data_key.get (current_inferior ()); |
56a9aa1d | 1181 | if (sim_data == NULL || sim_data->gdbsim_desc == NULL) |
386535dd | 1182 | return; |
56a9aa1d | 1183 | |
386535dd PA |
1184 | /* sim_complete_command returns a NULL-terminated malloc'ed array of |
1185 | malloc'ed strings. */ | |
1186 | struct sim_completions_deleter | |
1187 | { | |
1188 | void operator() (char **ptr) const | |
1189 | { | |
1190 | for (size_t i = 0; ptr[i] != NULL; i++) | |
1191 | xfree (ptr[i]); | |
1192 | xfree (ptr); | |
1193 | } | |
1194 | }; | |
1195 | ||
1196 | std::unique_ptr<char *[], sim_completions_deleter> sim_completions | |
1197 | (sim_complete_command (sim_data->gdbsim_desc, text, word)); | |
1198 | if (sim_completions == NULL) | |
1199 | return; | |
34370865 | 1200 | |
386535dd PA |
1201 | /* Count the elements and add completions from tail to head because |
1202 | below we'll swap elements out of the array in case add_completion | |
1203 | throws and the deleter deletes until it finds a NULL element. */ | |
1204 | size_t count = 0; | |
1205 | while (sim_completions[count] != NULL) | |
1206 | count++; | |
34370865 | 1207 | |
386535dd PA |
1208 | for (size_t i = count; i > 0; i--) |
1209 | { | |
1210 | gdb::unique_xmalloc_ptr<char> match (sim_completions[i - 1]); | |
1211 | sim_completions[i - 1] = NULL; | |
1212 | tracker.add_completion (std::move (match)); | |
1213 | } | |
56a9aa1d MF |
1214 | } |
1215 | ||
9de2bdd7 PA |
1216 | /* Check to see if a thread is still alive. */ |
1217 | ||
57810aa7 | 1218 | bool |
f6ac5f3d | 1219 | gdbsim_target::thread_alive (ptid_t ptid) |
9de2bdd7 | 1220 | { |
db04efe6 | 1221 | struct sim_inferior_data *sim_data |
e0037b4c | 1222 | = get_inferior_data_by_ptid (ptid, SIM_INSTANCE_NOT_NEEDED); |
db04efe6 KB |
1223 | |
1224 | if (sim_data == NULL) | |
57810aa7 | 1225 | return false; |
db04efe6 | 1226 | |
d7e15655 | 1227 | if (ptid == sim_data->remote_sim_ptid) |
9de2bdd7 | 1228 | /* The simulators' task is always alive. */ |
57810aa7 | 1229 | return true; |
9de2bdd7 | 1230 | |
57810aa7 | 1231 | return false; |
9de2bdd7 PA |
1232 | } |
1233 | ||
a068643d | 1234 | /* Convert a thread ID to a string. */ |
9de2bdd7 | 1235 | |
a068643d | 1236 | std::string |
f6ac5f3d | 1237 | gdbsim_target::pid_to_str (ptid_t ptid) |
9de2bdd7 | 1238 | { |
9de2bdd7 PA |
1239 | return normal_pid_to_str (ptid); |
1240 | } | |
1241 | ||
0c012db1 KB |
1242 | /* Simulator memory may be accessed after the program has been loaded. */ |
1243 | ||
57810aa7 | 1244 | bool |
f6ac5f3d | 1245 | gdbsim_target::has_all_memory () |
0c012db1 KB |
1246 | { |
1247 | struct sim_inferior_data *sim_data | |
1248 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
1249 | ||
1250 | if (!sim_data->program_loaded) | |
57810aa7 | 1251 | return false; |
0c012db1 | 1252 | |
57810aa7 | 1253 | return true; |
0c012db1 KB |
1254 | } |
1255 | ||
57810aa7 | 1256 | bool |
f6ac5f3d | 1257 | gdbsim_target::has_memory () |
0c012db1 KB |
1258 | { |
1259 | struct sim_inferior_data *sim_data | |
1260 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
1261 | ||
1262 | if (!sim_data->program_loaded) | |
57810aa7 | 1263 | return false; |
0c012db1 | 1264 | |
57810aa7 | 1265 | return true; |
0c012db1 KB |
1266 | } |
1267 | ||
6c265988 | 1268 | void _initialize_remote_sim (); |
c906108c | 1269 | void |
6c265988 | 1270 | _initialize_remote_sim () |
c906108c | 1271 | { |
56a9aa1d MF |
1272 | struct cmd_list_element *c; |
1273 | ||
d9f719f1 | 1274 | add_target (gdbsim_target_info, gdbsim_target_open); |
c906108c | 1275 | |
56a9aa1d MF |
1276 | c = add_com ("sim", class_obscure, simulator_command, |
1277 | _("Send a command to the simulator.")); | |
1278 | set_cmd_completer (c, sim_command_completer); | |
c906108c | 1279 | } |