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c906108c | 1 | /* Generic remote debugging interface for simulators. |
0a65a603 | 2 | |
3666a048 | 3 | Copyright (C) 1993-2021 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" |
e904f56d | 45 | #include "memory-map.h" |
c906108c SS |
46 | |
47 | /* Prototypes */ | |
48 | ||
a14ed312 | 49 | static void init_callbacks (void); |
c906108c | 50 | |
a14ed312 | 51 | static void end_callbacks (void); |
c906108c | 52 | |
a14ed312 | 53 | static int gdb_os_write_stdout (host_callback *, const char *, int); |
c906108c | 54 | |
a14ed312 | 55 | static void gdb_os_flush_stdout (host_callback *); |
c906108c | 56 | |
a14ed312 | 57 | static int gdb_os_write_stderr (host_callback *, const char *, int); |
c906108c | 58 | |
a14ed312 | 59 | static void gdb_os_flush_stderr (host_callback *); |
c906108c | 60 | |
a14ed312 | 61 | static int gdb_os_poll_quit (host_callback *); |
c906108c | 62 | |
0df8b418 | 63 | /* printf_filtered is depreciated. */ |
a14ed312 | 64 | static void gdb_os_printf_filtered (host_callback *, const char *, ...); |
c906108c | 65 | |
a14ed312 | 66 | static void gdb_os_vprintf_filtered (host_callback *, const char *, va_list); |
c906108c | 67 | |
a14ed312 | 68 | static void gdb_os_evprintf_filtered (host_callback *, const char *, va_list); |
c906108c | 69 | |
c25c4a8b JK |
70 | static void gdb_os_error (host_callback *, const char *, ...) |
71 | ATTRIBUTE_NORETURN; | |
c906108c | 72 | |
f6ac5f3d | 73 | /* Naming convention: |
c906108c | 74 | |
f6ac5f3d PA |
75 | sim_* are the interface to the simulator (see remote-sim.h). |
76 | gdbsim_* are stuff which is internal to gdb. */ | |
c906108c | 77 | |
e0037b4c SM |
78 | /* Value of the next pid to allocate for an inferior. As indicated |
79 | elsewhere, its initial value is somewhat arbitrary; it's critical | |
80 | though that it's not zero or negative. */ | |
81 | static int next_pid; | |
82 | #define INITIAL_PID 42000 | |
83 | ||
84 | /* Simulator-specific, per-inferior state. */ | |
85 | struct sim_inferior_data { | |
86 | explicit sim_inferior_data (SIM_DESC desc) | |
87 | : gdbsim_desc (desc), | |
88 | remote_sim_ptid (next_pid, 0, next_pid) | |
89 | { | |
dcc9fbc6 | 90 | gdb_assert (remote_sim_ptid != null_ptid); |
e0037b4c SM |
91 | ++next_pid; |
92 | } | |
93 | ||
94 | ~sim_inferior_data (); | |
95 | ||
96 | /* Flag which indicates whether or not the program has been loaded. */ | |
97 | int program_loaded = 0; | |
98 | ||
99 | /* Simulator descriptor for this inferior. */ | |
100 | SIM_DESC gdbsim_desc; | |
101 | ||
102 | /* This is the ptid we use for this particular simulator instance. Its | |
103 | value is somewhat arbitrary, as the simulator target don't have a | |
104 | notion of tasks or threads, but we need something non-null to place | |
105 | in inferior_ptid. For simulators which permit multiple instances, | |
106 | we also need a unique identifier to use for each inferior. */ | |
107 | ptid_t remote_sim_ptid; | |
108 | ||
109 | /* Signal with which to resume. */ | |
110 | enum gdb_signal resume_siggnal = GDB_SIGNAL_0; | |
111 | ||
112 | /* Flag which indicates whether resume should step or not. */ | |
113 | int resume_step = 0; | |
114 | }; | |
115 | ||
d9f719f1 PA |
116 | static const target_info gdbsim_target_info = { |
117 | "sim", | |
118 | N_("simulator"), | |
119 | N_("Use the compiled-in simulator.") | |
120 | }; | |
121 | ||
f6ac5f3d | 122 | struct gdbsim_target final |
3b3dac9b | 123 | : public memory_breakpoint_target<process_stratum_target> |
f6ac5f3d | 124 | { |
3b3dac9b | 125 | gdbsim_target () = default; |
c906108c | 126 | |
d9f719f1 PA |
127 | const target_info &info () const override |
128 | { return gdbsim_target_info; } | |
c906108c | 129 | |
f6ac5f3d | 130 | void close () override; |
c906108c | 131 | |
f6ac5f3d | 132 | void detach (inferior *inf, int) override; |
c906108c | 133 | |
f6ac5f3d | 134 | void resume (ptid_t, int, enum gdb_signal) override; |
b60cea74 | 135 | ptid_t wait (ptid_t, struct target_waitstatus *, target_wait_flags) override; |
c906108c | 136 | |
f6ac5f3d PA |
137 | void fetch_registers (struct regcache *, int) override; |
138 | void store_registers (struct regcache *, int) override; | |
139 | void prepare_to_store (struct regcache *) override; | |
c906108c | 140 | |
f6ac5f3d PA |
141 | enum target_xfer_status xfer_partial (enum target_object object, |
142 | const char *annex, | |
143 | gdb_byte *readbuf, | |
144 | const gdb_byte *writebuf, | |
145 | ULONGEST offset, ULONGEST len, | |
146 | ULONGEST *xfered_len) override; | |
147 | ||
148 | void files_info () override; | |
149 | ||
150 | void kill () override; | |
151 | ||
152 | void load (const char *, int) override; | |
153 | ||
154 | bool can_create_inferior () override { return true; } | |
155 | void create_inferior (const char *, const std::string &, | |
156 | char **, int) override; | |
157 | ||
158 | void mourn_inferior () override; | |
159 | ||
160 | void interrupt () override; | |
161 | ||
57810aa7 | 162 | bool thread_alive (ptid_t ptid) override; |
c906108c | 163 | |
a068643d | 164 | std::string pid_to_str (ptid_t) override; |
f6ac5f3d | 165 | |
57810aa7 PA |
166 | bool has_all_memory () override; |
167 | bool has_memory () override; | |
e904f56d | 168 | std::vector<mem_region> memory_map () override; |
e0037b4c SM |
169 | |
170 | private: | |
171 | sim_inferior_data *get_inferior_data_by_ptid (ptid_t ptid, | |
172 | int sim_instance_needed); | |
173 | void resume_one_inferior (inferior *inf, bool step, gdb_signal siggnal); | |
174 | void close_one_inferior (inferior *inf); | |
f6ac5f3d PA |
175 | }; |
176 | ||
177 | static struct gdbsim_target gdbsim_ops; | |
c906108c | 178 | |
18101a35 TT |
179 | static inferior_key<sim_inferior_data> sim_inferior_data_key; |
180 | ||
db04efe6 KB |
181 | /* Flag indicating the "open" status of this module. It's set to 1 |
182 | in gdbsim_open() and 0 in gdbsim_close(). */ | |
183 | static int gdbsim_is_open = 0; | |
184 | ||
db04efe6 KB |
185 | /* Argument list to pass to sim_open(). It is allocated in gdbsim_open() |
186 | and deallocated in gdbsim_close(). The lifetime needs to extend beyond | |
187 | the call to gdbsim_open() due to the fact that other sim instances other | |
188 | than the first will be allocated after the gdbsim_open() call. */ | |
189 | static char **sim_argv = NULL; | |
190 | ||
191 | /* OS-level callback functions for write, flush, etc. */ | |
192 | static host_callback gdb_callback; | |
193 | static int callbacks_initialized = 0; | |
194 | ||
db04efe6 KB |
195 | /* Flags indicating whether or not a sim instance is needed. One of these |
196 | flags should be passed to get_sim_inferior_data(). */ | |
197 | ||
198 | enum {SIM_INSTANCE_NOT_NEEDED = 0, SIM_INSTANCE_NEEDED = 1}; | |
199 | ||
200 | /* Obtain pointer to per-inferior simulator data, allocating it if necessary. | |
201 | Attempt to open the sim if SIM_INSTANCE_NEEDED is true. */ | |
202 | ||
203 | static struct sim_inferior_data * | |
204 | get_sim_inferior_data (struct inferior *inf, int sim_instance_needed) | |
205 | { | |
206 | SIM_DESC sim_desc = NULL; | |
18101a35 | 207 | struct sim_inferior_data *sim_data = sim_inferior_data_key.get (inf); |
db04efe6 KB |
208 | |
209 | /* Try to allocate a new sim instance, if needed. We do this ahead of | |
210 | a potential allocation of a sim_inferior_data struct in order to | |
211 | avoid needlessly allocating that struct in the event that the sim | |
212 | instance allocation fails. */ | |
74228e77 | 213 | if (sim_instance_needed == SIM_INSTANCE_NEEDED |
db04efe6 KB |
214 | && (sim_data == NULL || sim_data->gdbsim_desc == NULL)) |
215 | { | |
7e10abd1 TT |
216 | sim_desc = sim_open (SIM_OPEN_DEBUG, &gdb_callback, |
217 | current_program_space->exec_bfd (), sim_argv); | |
db04efe6 KB |
218 | if (sim_desc == NULL) |
219 | error (_("Unable to create simulator instance for inferior %d."), | |
220 | inf->num); | |
221 | ||
b3ee6dd9 SM |
222 | /* Check if the sim descriptor is the same as that of another |
223 | inferior. */ | |
224 | for (inferior *other_inf : all_inferiors ()) | |
db04efe6 | 225 | { |
b3ee6dd9 SM |
226 | sim_inferior_data *other_sim_data |
227 | = sim_inferior_data_key.get (other_inf); | |
228 | ||
229 | if (other_sim_data != NULL | |
230 | && other_sim_data->gdbsim_desc == sim_desc) | |
231 | { | |
232 | /* We don't close the descriptor due to the fact that it's | |
233 | shared with some other inferior. If we were to close it, | |
234 | that might needlessly muck up the other inferior. Of | |
235 | course, it's possible that the damage has already been | |
236 | done... Note that it *will* ultimately be closed during | |
237 | cleanup of the other inferior. */ | |
238 | sim_desc = NULL; | |
239 | error ( | |
240 | _("Inferior %d and inferior %d would have identical simulator state.\n" | |
241 | "(This simulator does not support the running of more than one inferior.)"), | |
242 | inf->num, other_inf->num); | |
243 | } | |
74228e77 | 244 | } |
db04efe6 KB |
245 | } |
246 | ||
247 | if (sim_data == NULL) | |
248 | { | |
18101a35 | 249 | sim_data = sim_inferior_data_key.emplace (inf, sim_desc); |
db04efe6 KB |
250 | } |
251 | else if (sim_desc) | |
252 | { | |
253 | /* This handles the case where sim_data was allocated prior to | |
74228e77 | 254 | needing a sim instance. */ |
db04efe6 KB |
255 | sim_data->gdbsim_desc = sim_desc; |
256 | } | |
c906108c | 257 | |
c906108c | 258 | |
db04efe6 KB |
259 | return sim_data; |
260 | } | |
261 | ||
262 | /* Return pointer to per-inferior simulator data using PTID to find the | |
263 | inferior in question. Return NULL when no inferior is found or | |
264 | when ptid has a zero or negative pid component. */ | |
265 | ||
e0037b4c SM |
266 | sim_inferior_data * |
267 | gdbsim_target::get_inferior_data_by_ptid (ptid_t ptid, | |
268 | int sim_instance_needed) | |
db04efe6 KB |
269 | { |
270 | struct inferior *inf; | |
e99b03dc | 271 | int pid = ptid.pid (); |
db04efe6 KB |
272 | |
273 | if (pid <= 0) | |
274 | return NULL; | |
74228e77 | 275 | |
e0037b4c | 276 | inf = find_inferior_pid (this, pid); |
db04efe6 KB |
277 | |
278 | if (inf) | |
279 | return get_sim_inferior_data (inf, sim_instance_needed); | |
280 | else | |
281 | return NULL; | |
282 | } | |
283 | ||
284 | /* Free the per-inferior simulator data. */ | |
285 | ||
18101a35 | 286 | sim_inferior_data::~sim_inferior_data () |
db04efe6 | 287 | { |
18101a35 TT |
288 | if (gdbsim_desc) |
289 | sim_close (gdbsim_desc, 0); | |
db04efe6 | 290 | } |
9de2bdd7 | 291 | |
c906108c | 292 | static void |
146ec4db | 293 | dump_mem (const gdb_byte *buf, int len) |
c906108c | 294 | { |
1385f66c | 295 | fputs_unfiltered ("\t", gdb_stdlog); |
3d468296 AB |
296 | |
297 | if (len == 8 || len == 4) | |
c906108c | 298 | { |
3d468296 | 299 | uint32_t l[2]; |
123f5f96 | 300 | |
3d468296 | 301 | memcpy (l, buf, len); |
1385f66c | 302 | fprintf_unfiltered (gdb_stdlog, "0x%08x", l[0]); |
3d468296 | 303 | if (len == 8) |
1385f66c | 304 | fprintf_unfiltered (gdb_stdlog, " 0x%08x", l[1]); |
3d468296 AB |
305 | } |
306 | else | |
307 | { | |
308 | int i; | |
123f5f96 | 309 | |
3d468296 | 310 | for (i = 0; i < len; i++) |
1385f66c | 311 | fprintf_unfiltered (gdb_stdlog, "0x%02x ", buf[i]); |
c906108c | 312 | } |
3d468296 | 313 | |
1385f66c | 314 | fputs_unfiltered ("\n", gdb_stdlog); |
c906108c SS |
315 | } |
316 | ||
c906108c SS |
317 | /* Initialize gdb_callback. */ |
318 | ||
319 | static void | |
fba45db2 | 320 | init_callbacks (void) |
c906108c | 321 | { |
c5aa993b | 322 | if (!callbacks_initialized) |
c906108c SS |
323 | { |
324 | gdb_callback = default_callback; | |
325 | gdb_callback.init (&gdb_callback); | |
326 | gdb_callback.write_stdout = gdb_os_write_stdout; | |
327 | gdb_callback.flush_stdout = gdb_os_flush_stdout; | |
328 | gdb_callback.write_stderr = gdb_os_write_stderr; | |
329 | gdb_callback.flush_stderr = gdb_os_flush_stderr; | |
330 | gdb_callback.printf_filtered = gdb_os_printf_filtered; | |
331 | gdb_callback.vprintf_filtered = gdb_os_vprintf_filtered; | |
332 | gdb_callback.evprintf_filtered = gdb_os_evprintf_filtered; | |
333 | gdb_callback.error = gdb_os_error; | |
334 | gdb_callback.poll_quit = gdb_os_poll_quit; | |
335 | gdb_callback.magic = HOST_CALLBACK_MAGIC; | |
336 | callbacks_initialized = 1; | |
337 | } | |
338 | } | |
339 | ||
340 | /* Release callbacks (free resources used by them). */ | |
341 | ||
342 | static void | |
fba45db2 | 343 | end_callbacks (void) |
c906108c SS |
344 | { |
345 | if (callbacks_initialized) | |
346 | { | |
347 | gdb_callback.shutdown (&gdb_callback); | |
348 | callbacks_initialized = 0; | |
349 | } | |
350 | } | |
351 | ||
352 | /* GDB version of os_write_stdout callback. */ | |
353 | ||
c5aa993b | 354 | static int |
fba45db2 | 355 | gdb_os_write_stdout (host_callback *p, const char *buf, int len) |
c906108c | 356 | { |
da5bd37e | 357 | gdb_stdtarg->write (buf, len); |
c906108c SS |
358 | return len; |
359 | } | |
360 | ||
361 | /* GDB version of os_flush_stdout callback. */ | |
362 | ||
363 | static void | |
fba45db2 | 364 | gdb_os_flush_stdout (host_callback *p) |
c906108c | 365 | { |
da5bd37e | 366 | gdb_stdtarg->flush (); |
c906108c SS |
367 | } |
368 | ||
369 | /* GDB version of os_write_stderr callback. */ | |
370 | ||
c5aa993b | 371 | static int |
fba45db2 | 372 | gdb_os_write_stderr (host_callback *p, const char *buf, int len) |
c906108c SS |
373 | { |
374 | int i; | |
375 | char b[2]; | |
376 | ||
c5aa993b | 377 | for (i = 0; i < len; i++) |
c906108c SS |
378 | { |
379 | b[0] = buf[i]; | |
380 | b[1] = 0; | |
da5bd37e | 381 | gdb_stdtargerr->puts (b); |
c906108c SS |
382 | } |
383 | return len; | |
384 | } | |
385 | ||
386 | /* GDB version of os_flush_stderr callback. */ | |
387 | ||
388 | static void | |
fba45db2 | 389 | gdb_os_flush_stderr (host_callback *p) |
c906108c | 390 | { |
da5bd37e | 391 | gdb_stdtargerr->flush (); |
c906108c SS |
392 | } |
393 | ||
394 | /* GDB version of printf_filtered callback. */ | |
395 | ||
7104e59b SM |
396 | static void ATTRIBUTE_PRINTF (2, 3) |
397 | gdb_os_printf_filtered (host_callback * p, const char *format, ...) | |
c906108c SS |
398 | { |
399 | va_list args; | |
c906108c | 400 | |
123f5f96 | 401 | va_start (args, format); |
c906108c | 402 | vfprintf_filtered (gdb_stdout, format, args); |
c906108c SS |
403 | va_end (args); |
404 | } | |
405 | ||
406 | /* GDB version of error vprintf_filtered. */ | |
407 | ||
7104e59b | 408 | static void ATTRIBUTE_PRINTF (2, 0) |
c5aa993b | 409 | gdb_os_vprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c SS |
410 | { |
411 | vfprintf_filtered (gdb_stdout, format, ap); | |
412 | } | |
413 | ||
414 | /* GDB version of error evprintf_filtered. */ | |
415 | ||
7104e59b | 416 | static void ATTRIBUTE_PRINTF (2, 0) |
c5aa993b | 417 | gdb_os_evprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c SS |
418 | { |
419 | vfprintf_filtered (gdb_stderr, format, ap); | |
420 | } | |
421 | ||
422 | /* GDB version of error callback. */ | |
423 | ||
7104e59b | 424 | static void ATTRIBUTE_PRINTF (2, 3) |
58d4abe1 | 425 | gdb_os_error (host_callback * p, const char *format, ...) |
c906108c | 426 | { |
58d4abe1 | 427 | va_list args; |
123f5f96 | 428 | |
58d4abe1 PA |
429 | va_start (args, format); |
430 | verror (format, args); | |
431 | va_end (args); | |
c906108c SS |
432 | } |
433 | ||
8238d0bf | 434 | int |
e7faf938 | 435 | one2one_register_sim_regno (struct gdbarch *gdbarch, int regnum) |
8238d0bf AC |
436 | { |
437 | /* Only makes sense to supply raw registers. */ | |
e7faf938 | 438 | gdb_assert (regnum >= 0 && regnum < gdbarch_num_regs (gdbarch)); |
8238d0bf AC |
439 | return regnum; |
440 | } | |
441 | ||
f6ac5f3d PA |
442 | void |
443 | gdbsim_target::fetch_registers (struct regcache *regcache, int regno) | |
c906108c | 444 | { |
ac7936df | 445 | struct gdbarch *gdbarch = regcache->arch (); |
e0037b4c | 446 | struct inferior *inf = find_inferior_ptid (this, regcache->ptid ()); |
db04efe6 | 447 | struct sim_inferior_data *sim_data |
bcc0c096 | 448 | = get_sim_inferior_data (inf, SIM_INSTANCE_NEEDED); |
123f5f96 | 449 | |
c5aa993b | 450 | if (regno == -1) |
c906108c | 451 | { |
40a6adc1 | 452 | for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++) |
f6ac5f3d | 453 | fetch_registers (regcache, regno); |
8238d0bf | 454 | return; |
c906108c | 455 | } |
8238d0bf | 456 | |
40a6adc1 | 457 | switch (gdbarch_register_sim_regno (gdbarch, regno)) |
c906108c | 458 | { |
8238d0bf AC |
459 | case LEGACY_SIM_REGNO_IGNORE: |
460 | break; | |
461 | case SIM_REGNO_DOES_NOT_EXIST: | |
462 | { | |
463 | /* For moment treat a `does not exist' register the same way | |
74228e77 | 464 | as an ``unavailable'' register. */ |
a4d1e79a | 465 | regcache->raw_supply_zeroed (regno); |
8238d0bf AC |
466 | break; |
467 | } | |
74228e77 | 468 | |
8238d0bf AC |
469 | default: |
470 | { | |
471 | static int warn_user = 1; | |
a4d1e79a AH |
472 | int regsize = register_size (gdbarch, regno); |
473 | gdb::byte_vector buf (regsize, 0); | |
8238d0bf | 474 | int nr_bytes; |
123f5f96 | 475 | |
40a6adc1 | 476 | gdb_assert (regno >= 0 && regno < gdbarch_num_regs (gdbarch)); |
db04efe6 | 477 | nr_bytes = sim_fetch_register (sim_data->gdbsim_desc, |
474c1661 | 478 | gdbarch_register_sim_regno |
40a6adc1 | 479 | (gdbarch, regno), |
a4d1e79a AH |
480 | buf.data (), regsize); |
481 | if (nr_bytes > 0 && nr_bytes != regsize && warn_user) | |
8238d0bf AC |
482 | { |
483 | fprintf_unfiltered (gdb_stderr, | |
0df8b418 MS |
484 | "Size of register %s (%d/%d) " |
485 | "incorrect (%d instead of %d))", | |
40a6adc1 | 486 | gdbarch_register_name (gdbarch, regno), |
474c1661 | 487 | regno, |
a4d1e79a AH |
488 | gdbarch_register_sim_regno (gdbarch, regno), |
489 | nr_bytes, regsize); | |
8238d0bf AC |
490 | warn_user = 0; |
491 | } | |
492 | /* FIXME: cagney/2002-05-27: Should check `nr_bytes == 0' | |
278a7cf7 | 493 | indicating that GDB and the SIM have different ideas about |
8238d0bf AC |
494 | which registers are fetchable. */ |
495 | /* Else if (nr_bytes < 0): an old simulator, that doesn't | |
496 | think to return the register size. Just assume all is ok. */ | |
a4d1e79a | 497 | regcache->raw_supply (regno, buf.data ()); |
ea35711c | 498 | if (remote_debug) |
8238d0bf | 499 | { |
1385f66c PA |
500 | fprintf_unfiltered (gdb_stdlog, |
501 | "gdbsim_fetch_register: %d", regno); | |
8238d0bf | 502 | /* FIXME: We could print something more intelligible. */ |
a4d1e79a | 503 | dump_mem (buf.data (), regsize); |
8238d0bf AC |
504 | } |
505 | break; | |
506 | } | |
c906108c SS |
507 | } |
508 | } | |
509 | ||
510 | ||
f6ac5f3d PA |
511 | void |
512 | gdbsim_target::store_registers (struct regcache *regcache, int regno) | |
c906108c | 513 | { |
ac7936df | 514 | struct gdbarch *gdbarch = regcache->arch (); |
e0037b4c | 515 | struct inferior *inf = find_inferior_ptid (this, regcache->ptid ()); |
db04efe6 | 516 | struct sim_inferior_data *sim_data |
bcc0c096 | 517 | = get_sim_inferior_data (inf, SIM_INSTANCE_NEEDED); |
db04efe6 | 518 | |
c5aa993b | 519 | if (regno == -1) |
c906108c | 520 | { |
40a6adc1 | 521 | for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++) |
f6ac5f3d | 522 | store_registers (regcache, regno); |
8238d0bf | 523 | return; |
c906108c | 524 | } |
40a6adc1 | 525 | else if (gdbarch_register_sim_regno (gdbarch, regno) >= 0) |
c906108c | 526 | { |
a4d1e79a AH |
527 | int regsize = register_size (gdbarch, regno); |
528 | gdb::byte_vector tmp (regsize); | |
c906108c | 529 | int nr_bytes; |
123f5f96 | 530 | |
a4d1e79a | 531 | regcache->cooked_read (regno, tmp.data ()); |
db04efe6 | 532 | nr_bytes = sim_store_register (sim_data->gdbsim_desc, |
474c1661 | 533 | gdbarch_register_sim_regno |
40a6adc1 | 534 | (gdbarch, regno), |
a4d1e79a AH |
535 | tmp.data (), regsize); |
536 | ||
537 | if (nr_bytes > 0 && nr_bytes != regsize) | |
8e65ff28 | 538 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 539 | _("Register size different to expected")); |
dae477fe | 540 | if (nr_bytes < 0) |
74228e77 RM |
541 | internal_error (__FILE__, __LINE__, |
542 | _("Register %d not updated"), regno); | |
dae477fe | 543 | if (nr_bytes == 0) |
74228e77 RM |
544 | warning (_("Register %s not updated"), |
545 | gdbarch_register_name (gdbarch, regno)); | |
dae477fe | 546 | |
ea35711c | 547 | if (remote_debug) |
c906108c | 548 | { |
1385f66c | 549 | fprintf_unfiltered (gdb_stdlog, "gdbsim_store_register: %d", regno); |
c906108c | 550 | /* FIXME: We could print something more intelligible. */ |
a4d1e79a | 551 | dump_mem (tmp.data (), regsize); |
c906108c SS |
552 | } |
553 | } | |
554 | } | |
555 | ||
556 | /* Kill the running program. This may involve closing any open files | |
557 | and releasing other resources acquired by the simulated program. */ | |
558 | ||
f6ac5f3d PA |
559 | void |
560 | gdbsim_target::kill () | |
c906108c | 561 | { |
ea35711c | 562 | if (remote_debug) |
1385f66c | 563 | fprintf_unfiltered (gdb_stdlog, "gdbsim_kill\n"); |
c906108c SS |
564 | |
565 | /* There is no need to `kill' running simulator - the simulator is | |
52bb452f | 566 | not running. Mourning it is enough. */ |
bc1e6c81 | 567 | target_mourn_inferior (inferior_ptid); |
c906108c SS |
568 | } |
569 | ||
570 | /* Load an executable file into the target process. This is expected to | |
571 | not only bring new code into the target process, but also to update | |
572 | GDB's symbol tables to match. */ | |
573 | ||
f6ac5f3d PA |
574 | void |
575 | gdbsim_target::load (const char *args, int fromtty) | |
c906108c | 576 | { |
b2b255bd | 577 | const char *prog; |
db04efe6 KB |
578 | struct sim_inferior_data *sim_data |
579 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NEEDED); | |
1986bccd | 580 | |
d1a41061 PP |
581 | if (args == NULL) |
582 | error_no_arg (_("program to load")); | |
1986bccd | 583 | |
773a1edc | 584 | gdb_argv argv (args); |
1986bccd AS |
585 | |
586 | prog = tilde_expand (argv[0]); | |
587 | ||
588 | if (argv[1] != NULL) | |
589 | error (_("GDB sim does not yet support a load offset.")); | |
590 | ||
ea35711c | 591 | if (remote_debug) |
1385f66c | 592 | fprintf_unfiltered (gdb_stdlog, "gdbsim_load: prog \"%s\"\n", prog); |
c906108c | 593 | |
c906108c SS |
594 | /* FIXME: We will print two messages on error. |
595 | Need error to either not print anything if passed NULL or need | |
596 | another routine that doesn't take any arguments. */ | |
db04efe6 | 597 | if (sim_load (sim_data->gdbsim_desc, prog, NULL, fromtty) == SIM_RC_FAIL) |
8a3fe4f8 | 598 | error (_("unable to load program")); |
c906108c SS |
599 | |
600 | /* FIXME: If a load command should reset the targets registers then | |
0df8b418 | 601 | a call to sim_create_inferior() should go here. */ |
c906108c | 602 | |
db04efe6 | 603 | sim_data->program_loaded = 1; |
c906108c SS |
604 | } |
605 | ||
606 | ||
39f77062 | 607 | /* Start an inferior process and set inferior_ptid to its pid. |
c906108c SS |
608 | EXEC_FILE is the file to run. |
609 | ARGS is a string containing the arguments to the program. | |
610 | ENV is the environment vector to pass. Errors reported with error(). | |
611 | On VxWorks and various standalone systems, we ignore exec_file. */ | |
612 | /* This is called not only when we first attach, but also when the | |
613 | user types "run" after having attached. */ | |
614 | ||
f6ac5f3d PA |
615 | void |
616 | gdbsim_target::create_inferior (const char *exec_file, | |
617 | const std::string &allargs, | |
618 | char **env, int from_tty) | |
c906108c | 619 | { |
db04efe6 KB |
620 | struct sim_inferior_data *sim_data |
621 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NEEDED); | |
c906108c | 622 | int len; |
773a1edc | 623 | char *arg_buf; |
7c5ded6a | 624 | const char *args = allargs.c_str (); |
c906108c | 625 | |
7e10abd1 | 626 | if (exec_file == 0 || current_program_space->exec_bfd () == 0) |
8a3fe4f8 | 627 | warning (_("No executable file specified.")); |
db04efe6 | 628 | if (!sim_data->program_loaded) |
8a3fe4f8 | 629 | warning (_("No program loaded.")); |
c906108c | 630 | |
ea35711c | 631 | if (remote_debug) |
1385f66c PA |
632 | fprintf_unfiltered (gdb_stdlog, |
633 | "gdbsim_create_inferior: exec_file \"%s\", args \"%s\"\n", | |
634 | (exec_file ? exec_file : "(NULL)"), | |
635 | args); | |
c906108c | 636 | |
d7e15655 | 637 | if (inferior_ptid == sim_data->remote_sim_ptid) |
f6ac5f3d | 638 | kill (); |
c906108c SS |
639 | remove_breakpoints (); |
640 | init_wait_for_inferior (); | |
641 | ||
773a1edc | 642 | gdb_argv built_argv; |
c906108c SS |
643 | if (exec_file != NULL) |
644 | { | |
7c5ded6a | 645 | len = strlen (exec_file) + 1 + allargs.size () + 1 + /*slop */ 10; |
c906108c SS |
646 | arg_buf = (char *) alloca (len); |
647 | arg_buf[0] = '\0'; | |
648 | strcat (arg_buf, exec_file); | |
649 | strcat (arg_buf, " "); | |
650 | strcat (arg_buf, args); | |
773a1edc | 651 | built_argv.reset (arg_buf); |
c906108c | 652 | } |
ddd60447 | 653 | |
7e10abd1 TT |
654 | if (sim_create_inferior (sim_data->gdbsim_desc, |
655 | current_program_space->exec_bfd (), | |
773a1edc | 656 | built_argv.get (), env) |
ddd60447 MF |
657 | != SIM_RC_OK) |
658 | error (_("Unable to create sim inferior.")); | |
c906108c | 659 | |
191f02e5 PA |
660 | inferior_appeared (current_inferior (), |
661 | sim_data->remote_sim_ptid.pid ()); | |
662 | thread_info *thr = add_thread_silent (this, sim_data->remote_sim_ptid); | |
663 | switch_to_thread (thr); | |
9de2bdd7 | 664 | |
0df8b418 MS |
665 | insert_breakpoints (); /* Needed to get correct instruction |
666 | in cache. */ | |
c906108c | 667 | |
88056fbb | 668 | clear_proceed_status (0); |
c906108c SS |
669 | } |
670 | ||
671 | /* The open routine takes the rest of the parameters from the command, | |
672 | and (if successful) pushes a new target onto the stack. | |
673 | Targets should supply this routine, if only to provide an error message. */ | |
0df8b418 | 674 | /* Called when selecting the simulator. E.g. (gdb) target sim name. */ |
c906108c | 675 | |
d9f719f1 PA |
676 | static void |
677 | gdbsim_target_open (const char *args, int from_tty) | |
c906108c SS |
678 | { |
679 | int len; | |
680 | char *arg_buf; | |
db04efe6 | 681 | struct sim_inferior_data *sim_data; |
87d1b309 | 682 | const char *sysroot; |
db04efe6 | 683 | SIM_DESC gdbsim_desc; |
c906108c | 684 | |
87d1b309 MF |
685 | sysroot = gdb_sysroot; |
686 | if (is_target_filename (sysroot)) | |
687 | sysroot += strlen (TARGET_SYSROOT_PREFIX); | |
688 | ||
ea35711c | 689 | if (remote_debug) |
1385f66c PA |
690 | fprintf_unfiltered (gdb_stdlog, |
691 | "gdbsim_open: args \"%s\"\n", args ? args : "(null)"); | |
c906108c | 692 | |
db04efe6 KB |
693 | /* Ensure that the sim target is not on the target stack. This is |
694 | necessary, because if it is on the target stack, the call to | |
695 | push_target below will invoke sim_close(), thus freeing various | |
696 | state (including a sim instance) that we allocate prior to | |
697 | invoking push_target(). We want to delay the push_target() | |
698 | operation until after we complete those operations which could | |
699 | error out. */ | |
700 | if (gdbsim_is_open) | |
c906108c SS |
701 | unpush_target (&gdbsim_ops); |
702 | ||
c5aa993b | 703 | len = (7 + 1 /* gdbsim */ |
c906108c SS |
704 | + strlen (" -E little") |
705 | + strlen (" --architecture=xxxxxxxxxx") | |
23bf70af | 706 | + strlen (" --sysroot=") + strlen (sysroot) + |
c906108c | 707 | + (args ? strlen (args) : 0) |
c5aa993b | 708 | + 50) /* slack */ ; |
c906108c | 709 | arg_buf = (char *) alloca (len); |
c5aa993b | 710 | strcpy (arg_buf, "gdbsim"); /* 7 */ |
b6d373df | 711 | /* Specify the byte order for the target when it is explicitly |
0df8b418 | 712 | specified by the user (not auto detected). */ |
b6d373df | 713 | switch (selected_byte_order ()) |
c906108c | 714 | { |
a8cf2722 AC |
715 | case BFD_ENDIAN_BIG: |
716 | strcat (arg_buf, " -E big"); | |
717 | break; | |
718 | case BFD_ENDIAN_LITTLE: | |
719 | strcat (arg_buf, " -E little"); | |
720 | break; | |
721 | case BFD_ENDIAN_UNKNOWN: | |
722 | break; | |
c906108c SS |
723 | } |
724 | /* Specify the architecture of the target when it has been | |
725 | explicitly specified */ | |
a8cf2722 | 726 | if (selected_architecture_name () != NULL) |
c906108c SS |
727 | { |
728 | strcat (arg_buf, " --architecture="); | |
a8cf2722 | 729 | strcat (arg_buf, selected_architecture_name ()); |
c906108c | 730 | } |
f4b8c29b MF |
731 | /* Pass along gdb's concept of the sysroot. */ |
732 | strcat (arg_buf, " --sysroot="); | |
23bf70af | 733 | strcat (arg_buf, sysroot); |
c906108c SS |
734 | /* finally, any explicit args */ |
735 | if (args) | |
736 | { | |
c5aa993b | 737 | strcat (arg_buf, " "); /* 1 */ |
c906108c SS |
738 | strcat (arg_buf, args); |
739 | } | |
773a1edc | 740 | |
74cbb09e | 741 | gdb_argv argv (arg_buf); |
67a3048c | 742 | sim_argv = argv.release (); |
c906108c SS |
743 | |
744 | init_callbacks (); | |
7e10abd1 TT |
745 | gdbsim_desc = sim_open (SIM_OPEN_DEBUG, &gdb_callback, |
746 | current_program_space->exec_bfd (), sim_argv); | |
c906108c SS |
747 | |
748 | if (gdbsim_desc == 0) | |
db04efe6 | 749 | { |
67a3048c | 750 | freeargv (sim_argv); |
db04efe6 KB |
751 | sim_argv = NULL; |
752 | error (_("unable to create simulator instance")); | |
753 | } | |
754 | ||
755 | /* Reset the pid numberings for this batch of sim instances. */ | |
756 | next_pid = INITIAL_PID; | |
757 | ||
758 | /* Allocate the inferior data, but do not allocate a sim instance | |
759 | since we've already just done that. */ | |
0df8b418 MS |
760 | sim_data = get_sim_inferior_data (current_inferior (), |
761 | SIM_INSTANCE_NOT_NEEDED); | |
db04efe6 KB |
762 | |
763 | sim_data->gdbsim_desc = gdbsim_desc; | |
c906108c SS |
764 | |
765 | push_target (&gdbsim_ops); | |
c906108c | 766 | printf_filtered ("Connected to the simulator.\n"); |
52bb452f DJ |
767 | |
768 | /* There's nothing running after "target sim" or "load"; not until | |
769 | "run". */ | |
191f02e5 | 770 | switch_to_no_thread (); |
db04efe6 KB |
771 | |
772 | gdbsim_is_open = 1; | |
773 | } | |
774 | ||
e0037b4c | 775 | /* Helper for gdbsim_target::close. */ |
db04efe6 | 776 | |
e0037b4c SM |
777 | void |
778 | gdbsim_target::close_one_inferior (inferior *inf) | |
db04efe6 | 779 | { |
18101a35 | 780 | struct sim_inferior_data *sim_data = sim_inferior_data_key.get (inf); |
db04efe6 KB |
781 | if (sim_data != NULL) |
782 | { | |
783 | ptid_t ptid = sim_data->remote_sim_ptid; | |
784 | ||
18101a35 | 785 | sim_inferior_data_key.clear (inf); |
db04efe6 KB |
786 | |
787 | /* Having a ptid allocated and stored in remote_sim_ptid does | |
0df8b418 | 788 | not mean that a corresponding inferior was ever created. |
db04efe6 KB |
789 | Thus we need to verify the existence of an inferior using the |
790 | pid in question before setting inferior_ptid via | |
791 | switch_to_thread() or mourning the inferior. */ | |
e0037b4c | 792 | if (find_inferior_ptid (this, ptid) != NULL) |
db04efe6 | 793 | { |
e0037b4c | 794 | switch_to_thread (this, ptid); |
db04efe6 KB |
795 | generic_mourn_inferior (); |
796 | } | |
797 | } | |
c906108c SS |
798 | } |
799 | ||
0df8b418 | 800 | /* Close out all files and local state before this target loses control. */ |
c906108c | 801 | |
f6ac5f3d PA |
802 | void |
803 | gdbsim_target::close () | |
c906108c | 804 | { |
ea35711c | 805 | if (remote_debug) |
1385f66c | 806 | fprintf_unfiltered (gdb_stdlog, "gdbsim_close\n"); |
c906108c | 807 | |
e0037b4c SM |
808 | for (inferior *inf : all_inferiors (this)) |
809 | close_one_inferior (inf); | |
c906108c | 810 | |
db04efe6 | 811 | if (sim_argv != NULL) |
c906108c | 812 | { |
db04efe6 KB |
813 | freeargv (sim_argv); |
814 | sim_argv = NULL; | |
c906108c SS |
815 | } |
816 | ||
817 | end_callbacks (); | |
db04efe6 KB |
818 | |
819 | gdbsim_is_open = 0; | |
c906108c SS |
820 | } |
821 | ||
822 | /* Takes a program previously attached to and detaches it. | |
823 | The program may resume execution (some targets do, some don't) and will | |
824 | no longer stop on signals, etc. We better not have left any breakpoints | |
6bd6f3b6 SM |
825 | in the program or it'll die when it hits one. FROM_TTY says whether to be |
826 | verbose or not. */ | |
c906108c SS |
827 | /* Terminate the open connection to the remote debugger. |
828 | Use this when you want to detach and do something else with your gdb. */ | |
829 | ||
f6ac5f3d PA |
830 | void |
831 | gdbsim_target::detach (inferior *inf, int from_tty) | |
c906108c | 832 | { |
ea35711c | 833 | if (remote_debug) |
6bd6f3b6 | 834 | fprintf_unfiltered (gdb_stdlog, "gdbsim_detach\n"); |
c906108c | 835 | |
f6ac5f3d | 836 | unpush_target (this); /* calls gdbsim_close to do the real work */ |
c906108c SS |
837 | if (from_tty) |
838 | printf_filtered ("Ending simulator %s debugging\n", target_shortname); | |
839 | } | |
c5aa993b | 840 | |
c906108c SS |
841 | /* Resume execution of the target process. STEP says whether to single-step |
842 | or to run free; SIGGNAL is the signal value (e.g. SIGINT) to be given | |
843 | to the target, or zero for no signal. */ | |
844 | ||
e0037b4c SM |
845 | void |
846 | gdbsim_target::resume_one_inferior (inferior *inf, bool step, | |
847 | gdb_signal siggnal) | |
db04efe6 KB |
848 | { |
849 | struct sim_inferior_data *sim_data | |
850 | = get_sim_inferior_data (inf, SIM_INSTANCE_NOT_NEEDED); | |
db04efe6 KB |
851 | |
852 | if (sim_data) | |
853 | { | |
e0037b4c SM |
854 | sim_data->resume_siggnal = siggnal; |
855 | sim_data->resume_step = step; | |
db04efe6 KB |
856 | |
857 | if (remote_debug) | |
1385f66c PA |
858 | fprintf_unfiltered (gdb_stdlog, |
859 | _("gdbsim_resume: pid %d, step %d, signal %d\n"), | |
e0037b4c | 860 | inf->pid, step, siggnal); |
db04efe6 | 861 | } |
db04efe6 | 862 | } |
c906108c | 863 | |
f6ac5f3d PA |
864 | void |
865 | gdbsim_target::resume (ptid_t ptid, int step, enum gdb_signal siggnal) | |
c906108c | 866 | { |
db04efe6 | 867 | struct sim_inferior_data *sim_data |
e0037b4c | 868 | = get_inferior_data_by_ptid (ptid, SIM_INSTANCE_NOT_NEEDED); |
db04efe6 | 869 | |
0df8b418 | 870 | /* We don't access any sim_data members within this function. |
db04efe6 KB |
871 | What's of interest is whether or not the call to |
872 | get_sim_inferior_data_by_ptid(), above, is able to obtain a | |
873 | non-NULL pointer. If it managed to obtain a non-NULL pointer, we | |
874 | know we have a single inferior to consider. If it's NULL, we | |
875 | either have multiple inferiors to resume or an error condition. */ | |
876 | ||
877 | if (sim_data) | |
e0037b4c | 878 | resume_one_inferior (find_inferior_ptid (this, ptid), step, siggnal); |
d7e15655 | 879 | else if (ptid == minus_one_ptid) |
e0037b4c SM |
880 | { |
881 | for (inferior *inf : all_inferiors (this)) | |
882 | resume_one_inferior (inf, step, siggnal); | |
883 | } | |
db04efe6 | 884 | else |
8a3fe4f8 | 885 | error (_("The program is not being run.")); |
c906108c SS |
886 | } |
887 | ||
bfedc46a | 888 | /* Notify the simulator of an asynchronous request to interrupt. |
c5aa993b | 889 | |
bfedc46a | 890 | The simulator shall ensure that the interrupt request is eventually |
c906108c | 891 | delivered to the simulator. If the call is made while the |
bfedc46a | 892 | simulator is not running then the interrupt request is processed when |
c906108c SS |
893 | the simulator is next resumed. |
894 | ||
db04efe6 KB |
895 | For simulators that do not support this operation, just abort. */ |
896 | ||
b3ee6dd9 SM |
897 | void |
898 | gdbsim_target::interrupt () | |
db04efe6 | 899 | { |
b3ee6dd9 | 900 | for (inferior *inf : all_inferiors ()) |
db04efe6 | 901 | { |
b3ee6dd9 SM |
902 | sim_inferior_data *sim_data |
903 | = get_sim_inferior_data (inf, SIM_INSTANCE_NEEDED); | |
904 | ||
905 | if (sim_data != nullptr && !sim_stop (sim_data->gdbsim_desc)) | |
db04efe6 | 906 | quit (); |
db04efe6 | 907 | } |
c906108c SS |
908 | } |
909 | ||
910 | /* GDB version of os_poll_quit callback. | |
8a0ce09a | 911 | Taken from gdb/util.c - should be in a library. */ |
c906108c SS |
912 | |
913 | static int | |
fba45db2 | 914 | gdb_os_poll_quit (host_callback *p) |
c906108c | 915 | { |
98bbd631 AC |
916 | if (deprecated_ui_loop_hook != NULL) |
917 | deprecated_ui_loop_hook (0); | |
7a292a7a | 918 | |
522002f9 | 919 | if (check_quit_flag ()) /* gdb's idea of quit */ |
abf009ef | 920 | return 1; |
c906108c SS |
921 | return 0; |
922 | } | |
923 | ||
924 | /* Wait for inferior process to do something. Return pid of child, | |
925 | or -1 in case of error; store status through argument pointer STATUS, | |
0df8b418 | 926 | just as `wait' would. */ |
c906108c SS |
927 | |
928 | static void | |
fba45db2 | 929 | gdbsim_cntrl_c (int signo) |
c906108c | 930 | { |
f6ac5f3d | 931 | gdbsim_ops.interrupt (); |
c906108c SS |
932 | } |
933 | ||
f6ac5f3d | 934 | ptid_t |
b60cea74 TT |
935 | gdbsim_target::wait (ptid_t ptid, struct target_waitstatus *status, |
936 | target_wait_flags options) | |
c906108c | 937 | { |
db04efe6 | 938 | struct sim_inferior_data *sim_data; |
a40805d4 | 939 | static sighandler_t prev_sigint; |
c906108c SS |
940 | int sigrc = 0; |
941 | enum sim_stop reason = sim_running; | |
942 | ||
db04efe6 KB |
943 | /* This target isn't able to (yet) resume more than one inferior at a time. |
944 | When ptid is minus_one_ptid, just use the current inferior. If we're | |
945 | given an explicit pid, we'll try to find it and use that instead. */ | |
d7e15655 | 946 | if (ptid == minus_one_ptid) |
0df8b418 MS |
947 | sim_data = get_sim_inferior_data (current_inferior (), |
948 | SIM_INSTANCE_NEEDED); | |
db04efe6 KB |
949 | else |
950 | { | |
e0037b4c | 951 | sim_data = get_inferior_data_by_ptid (ptid, SIM_INSTANCE_NEEDED); |
db04efe6 KB |
952 | if (sim_data == NULL) |
953 | error (_("Unable to wait for pid %d. Inferior not found."), | |
e99b03dc | 954 | ptid.pid ()); |
db04efe6 KB |
955 | } |
956 | ||
ea35711c | 957 | if (remote_debug) |
1385f66c | 958 | fprintf_unfiltered (gdb_stdlog, "gdbsim_wait\n"); |
c906108c SS |
959 | |
960 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) | |
961 | { | |
962 | struct sigaction sa, osa; | |
963 | sa.sa_handler = gdbsim_cntrl_c; | |
964 | sigemptyset (&sa.sa_mask); | |
965 | sa.sa_flags = 0; | |
966 | sigaction (SIGINT, &sa, &osa); | |
967 | prev_sigint = osa.sa_handler; | |
968 | } | |
969 | #else | |
970 | prev_sigint = signal (SIGINT, gdbsim_cntrl_c); | |
971 | #endif | |
db04efe6 | 972 | sim_resume (sim_data->gdbsim_desc, sim_data->resume_step, |
74228e77 | 973 | sim_data->resume_siggnal); |
db04efe6 | 974 | |
c906108c | 975 | signal (SIGINT, prev_sigint); |
db04efe6 | 976 | sim_data->resume_step = 0; |
c906108c | 977 | |
db04efe6 | 978 | sim_stop_reason (sim_data->gdbsim_desc, &reason, &sigrc); |
c906108c SS |
979 | |
980 | switch (reason) | |
981 | { | |
982 | case sim_exited: | |
983 | status->kind = TARGET_WAITKIND_EXITED; | |
984 | status->value.integer = sigrc; | |
985 | break; | |
986 | case sim_stopped: | |
987 | switch (sigrc) | |
988 | { | |
a493e3e2 | 989 | case GDB_SIGNAL_ABRT: |
c906108c SS |
990 | quit (); |
991 | break; | |
a493e3e2 PA |
992 | case GDB_SIGNAL_INT: |
993 | case GDB_SIGNAL_TRAP: | |
c906108c SS |
994 | default: |
995 | status->kind = TARGET_WAITKIND_STOPPED; | |
653090d3 | 996 | status->value.sig = (enum gdb_signal) sigrc; |
c906108c SS |
997 | break; |
998 | } | |
999 | break; | |
1000 | case sim_signalled: | |
1001 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
653090d3 | 1002 | status->value.sig = (enum gdb_signal) sigrc; |
c906108c SS |
1003 | break; |
1004 | case sim_running: | |
1005 | case sim_polling: | |
0df8b418 | 1006 | /* FIXME: Is this correct? */ |
c906108c SS |
1007 | break; |
1008 | } | |
1009 | ||
cf1d9e09 | 1010 | return sim_data->remote_sim_ptid; |
c906108c SS |
1011 | } |
1012 | ||
1013 | /* Get ready to modify the registers array. On machines which store | |
1014 | individual registers, this doesn't need to do anything. On machines | |
1015 | which store all the registers in one fell swoop, this makes sure | |
1016 | that registers contains all the registers from the program being | |
1017 | debugged. */ | |
1018 | ||
f6ac5f3d PA |
1019 | void |
1020 | gdbsim_target::prepare_to_store (struct regcache *regcache) | |
c906108c | 1021 | { |
0df8b418 | 1022 | /* Do nothing, since we can store individual regs. */ |
c906108c SS |
1023 | } |
1024 | ||
146ec4db PA |
1025 | /* Helper for gdbsim_xfer_partial that handles memory transfers. |
1026 | Arguments are like target_xfer_partial. */ | |
d93bce06 | 1027 | |
9b409511 | 1028 | static enum target_xfer_status |
146ec4db PA |
1029 | gdbsim_xfer_memory (struct target_ops *target, |
1030 | gdb_byte *readbuf, const gdb_byte *writebuf, | |
9b409511 | 1031 | ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) |
c906108c | 1032 | { |
db04efe6 KB |
1033 | struct sim_inferior_data *sim_data |
1034 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
b55e14c7 | 1035 | int l; |
db04efe6 | 1036 | |
0c012db1 KB |
1037 | /* If this target doesn't have memory yet, return 0 causing the |
1038 | request to be passed to a lower target, hopefully an exec | |
1039 | file. */ | |
f6ac5f3d | 1040 | if (!target->has_memory ()) |
9b409511 | 1041 | return TARGET_XFER_EOF; |
52bb452f | 1042 | |
db04efe6 | 1043 | if (!sim_data->program_loaded) |
8a3fe4f8 | 1044 | error (_("No program loaded.")); |
c906108c | 1045 | |
db04efe6 KB |
1046 | /* Note that we obtained the sim_data pointer above using |
1047 | SIM_INSTANCE_NOT_NEEDED. We do this so that we don't needlessly | |
1048 | allocate a sim instance prior to loading a program. If we | |
1049 | get to this point in the code though, gdbsim_desc should be | |
1050 | non-NULL. (Note that a sim instance is needed in order to load | |
1051 | the program...) */ | |
1052 | gdb_assert (sim_data->gdbsim_desc != NULL); | |
1053 | ||
ea35711c | 1054 | if (remote_debug) |
fcde0081 | 1055 | fprintf_unfiltered (gdb_stdlog, |
146ec4db PA |
1056 | "gdbsim_xfer_memory: readbuf %s, writebuf %s, " |
1057 | "memaddr %s, len %s\n", | |
1058 | host_address_to_string (readbuf), | |
1059 | host_address_to_string (writebuf), | |
fcde0081 | 1060 | paddress (target_gdbarch (), memaddr), |
b55e14c7 | 1061 | pulongest (len)); |
c906108c | 1062 | |
146ec4db | 1063 | if (writebuf) |
c906108c | 1064 | { |
fcde0081 | 1065 | if (remote_debug && len > 0) |
146ec4db | 1066 | dump_mem (writebuf, len); |
b55e14c7 | 1067 | l = sim_write (sim_data->gdbsim_desc, memaddr, writebuf, len); |
c906108c | 1068 | } |
c5aa993b | 1069 | else |
c906108c | 1070 | { |
b55e14c7 | 1071 | l = sim_read (sim_data->gdbsim_desc, memaddr, readbuf, len); |
ea35711c | 1072 | if (remote_debug && len > 0) |
146ec4db | 1073 | dump_mem (readbuf, len); |
c5aa993b | 1074 | } |
9b409511 YQ |
1075 | if (l > 0) |
1076 | { | |
1077 | *xfered_len = (ULONGEST) l; | |
1078 | return TARGET_XFER_OK; | |
1079 | } | |
1080 | else if (l == 0) | |
1081 | return TARGET_XFER_EOF; | |
1082 | else | |
1083 | return TARGET_XFER_E_IO; | |
c906108c SS |
1084 | } |
1085 | ||
146ec4db PA |
1086 | /* Target to_xfer_partial implementation. */ |
1087 | ||
f6ac5f3d PA |
1088 | enum target_xfer_status |
1089 | gdbsim_target::xfer_partial (enum target_object object, | |
1090 | const char *annex, gdb_byte *readbuf, | |
1091 | const gdb_byte *writebuf, ULONGEST offset, ULONGEST len, | |
1092 | ULONGEST *xfered_len) | |
146ec4db PA |
1093 | { |
1094 | switch (object) | |
1095 | { | |
1096 | case TARGET_OBJECT_MEMORY: | |
f6ac5f3d | 1097 | return gdbsim_xfer_memory (this, readbuf, writebuf, offset, len, |
9b409511 | 1098 | xfered_len); |
146ec4db PA |
1099 | |
1100 | default: | |
2ed4b548 | 1101 | return TARGET_XFER_E_IO; |
146ec4db PA |
1102 | } |
1103 | } | |
1104 | ||
f6ac5f3d PA |
1105 | void |
1106 | gdbsim_target::files_info () | |
c906108c | 1107 | { |
db04efe6 KB |
1108 | struct sim_inferior_data *sim_data |
1109 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NEEDED); | |
0d18d720 | 1110 | const char *file = "nothing"; |
c906108c | 1111 | |
7e10abd1 TT |
1112 | if (current_program_space->exec_bfd ()) |
1113 | file = bfd_get_filename (current_program_space->exec_bfd ()); | |
c906108c | 1114 | |
ea35711c | 1115 | if (remote_debug) |
1385f66c | 1116 | fprintf_unfiltered (gdb_stdlog, "gdbsim_files_info: file \"%s\"\n", file); |
c906108c | 1117 | |
7e10abd1 | 1118 | if (current_program_space->exec_bfd ()) |
c906108c | 1119 | { |
1385f66c PA |
1120 | fprintf_unfiltered (gdb_stdlog, "\tAttached to %s running program %s\n", |
1121 | target_shortname, file); | |
db04efe6 | 1122 | sim_info (sim_data->gdbsim_desc, 0); |
c906108c SS |
1123 | } |
1124 | } | |
1125 | ||
1126 | /* Clear the simulator's notion of what the break points are. */ | |
1127 | ||
f6ac5f3d PA |
1128 | void |
1129 | gdbsim_target::mourn_inferior () | |
c5aa993b | 1130 | { |
ea35711c | 1131 | if (remote_debug) |
1385f66c | 1132 | fprintf_unfiltered (gdb_stdlog, "gdbsim_mourn_inferior:\n"); |
c906108c SS |
1133 | |
1134 | remove_breakpoints (); | |
1135 | generic_mourn_inferior (); | |
1136 | } | |
1137 | ||
c906108c SS |
1138 | /* Pass the command argument through to the simulator verbatim. The |
1139 | simulator must do any command interpretation work. */ | |
1140 | ||
d04afd58 | 1141 | static void |
0b39b52e | 1142 | simulator_command (const char *args, int from_tty) |
c906108c | 1143 | { |
db04efe6 KB |
1144 | struct sim_inferior_data *sim_data; |
1145 | ||
1146 | /* We use inferior_data() instead of get_sim_inferior_data() here in | |
1147 | order to avoid attaching a sim_inferior_data struct to an | |
1148 | inferior unnecessarily. The reason we take such care here is due | |
1149 | to the fact that this function, simulator_command(), may be called | |
1150 | even when the sim target is not active. If we were to use | |
1151 | get_sim_inferior_data() here, it is possible that this call would | |
1152 | be made either prior to gdbsim_open() or after gdbsim_close(), | |
1153 | thus allocating memory that would not be garbage collected until | |
1154 | the ultimate destruction of the associated inferior. */ | |
1155 | ||
18101a35 | 1156 | sim_data = sim_inferior_data_key.get (current_inferior ()); |
db04efe6 | 1157 | if (sim_data == NULL || sim_data->gdbsim_desc == NULL) |
c906108c SS |
1158 | { |
1159 | ||
1160 | /* PREVIOUSLY: The user may give a command before the simulator | |
74228e77 RM |
1161 | is opened. [...] (??? assuming of course one wishes to |
1162 | continue to allow commands to be sent to unopened simulators, | |
1163 | which isn't entirely unreasonable). */ | |
c906108c SS |
1164 | |
1165 | /* The simulator is a builtin abstraction of a remote target. | |
74228e77 RM |
1166 | Consistent with that model, access to the simulator, via sim |
1167 | commands, is restricted to the period when the channel to the | |
1168 | simulator is open. */ | |
c906108c | 1169 | |
8a3fe4f8 | 1170 | error (_("Not connected to the simulator target")); |
c906108c SS |
1171 | } |
1172 | ||
db04efe6 | 1173 | sim_do_command (sim_data->gdbsim_desc, args); |
c906108c SS |
1174 | |
1175 | /* Invalidate the register cache, in case the simulator command does | |
0df8b418 | 1176 | something funny. */ |
c5aa993b | 1177 | registers_changed (); |
c906108c SS |
1178 | } |
1179 | ||
386535dd PA |
1180 | static void |
1181 | sim_command_completer (struct cmd_list_element *ignore, | |
1182 | completion_tracker &tracker, | |
1183 | const char *text, const char *word) | |
56a9aa1d MF |
1184 | { |
1185 | struct sim_inferior_data *sim_data; | |
1186 | ||
18101a35 | 1187 | sim_data = sim_inferior_data_key.get (current_inferior ()); |
56a9aa1d | 1188 | if (sim_data == NULL || sim_data->gdbsim_desc == NULL) |
386535dd | 1189 | return; |
56a9aa1d | 1190 | |
386535dd PA |
1191 | /* sim_complete_command returns a NULL-terminated malloc'ed array of |
1192 | malloc'ed strings. */ | |
1193 | struct sim_completions_deleter | |
1194 | { | |
1195 | void operator() (char **ptr) const | |
1196 | { | |
1197 | for (size_t i = 0; ptr[i] != NULL; i++) | |
1198 | xfree (ptr[i]); | |
1199 | xfree (ptr); | |
1200 | } | |
1201 | }; | |
1202 | ||
1203 | std::unique_ptr<char *[], sim_completions_deleter> sim_completions | |
1204 | (sim_complete_command (sim_data->gdbsim_desc, text, word)); | |
1205 | if (sim_completions == NULL) | |
1206 | return; | |
34370865 | 1207 | |
386535dd PA |
1208 | /* Count the elements and add completions from tail to head because |
1209 | below we'll swap elements out of the array in case add_completion | |
1210 | throws and the deleter deletes until it finds a NULL element. */ | |
1211 | size_t count = 0; | |
1212 | while (sim_completions[count] != NULL) | |
1213 | count++; | |
34370865 | 1214 | |
386535dd PA |
1215 | for (size_t i = count; i > 0; i--) |
1216 | { | |
1217 | gdb::unique_xmalloc_ptr<char> match (sim_completions[i - 1]); | |
1218 | sim_completions[i - 1] = NULL; | |
1219 | tracker.add_completion (std::move (match)); | |
1220 | } | |
56a9aa1d MF |
1221 | } |
1222 | ||
9de2bdd7 PA |
1223 | /* Check to see if a thread is still alive. */ |
1224 | ||
57810aa7 | 1225 | bool |
f6ac5f3d | 1226 | gdbsim_target::thread_alive (ptid_t ptid) |
9de2bdd7 | 1227 | { |
db04efe6 | 1228 | struct sim_inferior_data *sim_data |
e0037b4c | 1229 | = get_inferior_data_by_ptid (ptid, SIM_INSTANCE_NOT_NEEDED); |
db04efe6 KB |
1230 | |
1231 | if (sim_data == NULL) | |
57810aa7 | 1232 | return false; |
db04efe6 | 1233 | |
d7e15655 | 1234 | if (ptid == sim_data->remote_sim_ptid) |
9de2bdd7 | 1235 | /* The simulators' task is always alive. */ |
57810aa7 | 1236 | return true; |
9de2bdd7 | 1237 | |
57810aa7 | 1238 | return false; |
9de2bdd7 PA |
1239 | } |
1240 | ||
a068643d | 1241 | /* Convert a thread ID to a string. */ |
9de2bdd7 | 1242 | |
a068643d | 1243 | std::string |
f6ac5f3d | 1244 | gdbsim_target::pid_to_str (ptid_t ptid) |
9de2bdd7 | 1245 | { |
9de2bdd7 PA |
1246 | return normal_pid_to_str (ptid); |
1247 | } | |
1248 | ||
0c012db1 KB |
1249 | /* Simulator memory may be accessed after the program has been loaded. */ |
1250 | ||
57810aa7 | 1251 | bool |
f6ac5f3d | 1252 | gdbsim_target::has_all_memory () |
0c012db1 KB |
1253 | { |
1254 | struct sim_inferior_data *sim_data | |
1255 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
1256 | ||
1257 | if (!sim_data->program_loaded) | |
57810aa7 | 1258 | return false; |
0c012db1 | 1259 | |
57810aa7 | 1260 | return true; |
0c012db1 KB |
1261 | } |
1262 | ||
57810aa7 | 1263 | bool |
f6ac5f3d | 1264 | gdbsim_target::has_memory () |
0c012db1 KB |
1265 | { |
1266 | struct sim_inferior_data *sim_data | |
1267 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
1268 | ||
1269 | if (!sim_data->program_loaded) | |
57810aa7 | 1270 | return false; |
0c012db1 | 1271 | |
57810aa7 | 1272 | return true; |
0c012db1 KB |
1273 | } |
1274 | ||
e904f56d MF |
1275 | /* Get memory map from the simulator. */ |
1276 | ||
1277 | std::vector<mem_region> | |
1278 | gdbsim_target::memory_map () | |
1279 | { | |
1280 | struct sim_inferior_data *sim_data | |
1281 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NEEDED); | |
1282 | std::vector<mem_region> result; | |
1283 | gdb::unique_xmalloc_ptr<char> text (sim_memory_map (sim_data->gdbsim_desc)); | |
1284 | ||
1285 | if (text != nullptr) | |
1286 | result = parse_memory_map (text.get ()); | |
1287 | ||
1288 | return result; | |
1289 | } | |
1290 | ||
6c265988 | 1291 | void _initialize_remote_sim (); |
c906108c | 1292 | void |
6c265988 | 1293 | _initialize_remote_sim () |
c906108c | 1294 | { |
56a9aa1d MF |
1295 | struct cmd_list_element *c; |
1296 | ||
d9f719f1 | 1297 | add_target (gdbsim_target_info, gdbsim_target_open); |
c906108c | 1298 | |
56a9aa1d MF |
1299 | c = add_com ("sim", class_obscure, simulator_command, |
1300 | _("Send a command to the simulator.")); | |
1301 | set_cmd_completer (c, sim_command_completer); | |
c906108c | 1302 | } |