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c906108c | 1 | /* Generic remote debugging interface for simulators. |
0a65a603 | 2 | |
4a94e368 | 3 | Copyright (C) 1993-2022 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" |
df68e12b MF |
36 | #include "sim/callback.h" |
37 | #include "sim/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" |
cda09ec9 | 46 | #include "remote.h" |
72a52f2a | 47 | #include "gdbsupport/buildargv.h" |
c906108c SS |
48 | |
49 | /* Prototypes */ | |
50 | ||
a14ed312 | 51 | static void init_callbacks (void); |
c906108c | 52 | |
a14ed312 | 53 | static void end_callbacks (void); |
c906108c | 54 | |
a14ed312 | 55 | static int gdb_os_write_stdout (host_callback *, const char *, int); |
c906108c | 56 | |
a14ed312 | 57 | static void gdb_os_flush_stdout (host_callback *); |
c906108c | 58 | |
a14ed312 | 59 | static int gdb_os_write_stderr (host_callback *, const char *, int); |
c906108c | 60 | |
a14ed312 | 61 | static void gdb_os_flush_stderr (host_callback *); |
c906108c | 62 | |
a14ed312 | 63 | static int gdb_os_poll_quit (host_callback *); |
c906108c | 64 | |
6cb06a8c | 65 | /* gdb_printf is depreciated. */ |
a14ed312 | 66 | static void gdb_os_printf_filtered (host_callback *, const char *, ...); |
c906108c | 67 | |
a14ed312 | 68 | static void gdb_os_vprintf_filtered (host_callback *, const char *, va_list); |
c906108c | 69 | |
a14ed312 | 70 | static void gdb_os_evprintf_filtered (host_callback *, const char *, va_list); |
c906108c | 71 | |
c25c4a8b JK |
72 | static void gdb_os_error (host_callback *, const char *, ...) |
73 | ATTRIBUTE_NORETURN; | |
c906108c | 74 | |
f6ac5f3d | 75 | /* Naming convention: |
c906108c | 76 | |
f6ac5f3d PA |
77 | sim_* are the interface to the simulator (see remote-sim.h). |
78 | gdbsim_* are stuff which is internal to gdb. */ | |
c906108c | 79 | |
e0037b4c SM |
80 | /* Value of the next pid to allocate for an inferior. As indicated |
81 | elsewhere, its initial value is somewhat arbitrary; it's critical | |
82 | though that it's not zero or negative. */ | |
83 | static int next_pid; | |
84 | #define INITIAL_PID 42000 | |
85 | ||
86 | /* Simulator-specific, per-inferior state. */ | |
87 | struct sim_inferior_data { | |
88 | explicit sim_inferior_data (SIM_DESC desc) | |
89 | : gdbsim_desc (desc), | |
90 | remote_sim_ptid (next_pid, 0, next_pid) | |
91 | { | |
dcc9fbc6 | 92 | gdb_assert (remote_sim_ptid != null_ptid); |
e0037b4c SM |
93 | ++next_pid; |
94 | } | |
95 | ||
96 | ~sim_inferior_data (); | |
97 | ||
98 | /* Flag which indicates whether or not the program has been loaded. */ | |
99 | int program_loaded = 0; | |
100 | ||
101 | /* Simulator descriptor for this inferior. */ | |
102 | SIM_DESC gdbsim_desc; | |
103 | ||
104 | /* This is the ptid we use for this particular simulator instance. Its | |
105 | value is somewhat arbitrary, as the simulator target don't have a | |
106 | notion of tasks or threads, but we need something non-null to place | |
107 | in inferior_ptid. For simulators which permit multiple instances, | |
108 | we also need a unique identifier to use for each inferior. */ | |
109 | ptid_t remote_sim_ptid; | |
110 | ||
111 | /* Signal with which to resume. */ | |
112 | enum gdb_signal resume_siggnal = GDB_SIGNAL_0; | |
113 | ||
114 | /* Flag which indicates whether resume should step or not. */ | |
115 | int resume_step = 0; | |
116 | }; | |
117 | ||
d9f719f1 PA |
118 | static const target_info gdbsim_target_info = { |
119 | "sim", | |
120 | N_("simulator"), | |
121 | N_("Use the compiled-in simulator.") | |
122 | }; | |
123 | ||
f6ac5f3d | 124 | struct gdbsim_target final |
3b3dac9b | 125 | : public memory_breakpoint_target<process_stratum_target> |
f6ac5f3d | 126 | { |
3b3dac9b | 127 | gdbsim_target () = default; |
c906108c | 128 | |
d9f719f1 PA |
129 | const target_info &info () const override |
130 | { return gdbsim_target_info; } | |
c906108c | 131 | |
f6ac5f3d | 132 | void close () override; |
c906108c | 133 | |
f6ac5f3d | 134 | void detach (inferior *inf, int) override; |
c906108c | 135 | |
f6ac5f3d | 136 | void resume (ptid_t, int, enum gdb_signal) override; |
b60cea74 | 137 | ptid_t wait (ptid_t, struct target_waitstatus *, target_wait_flags) override; |
c906108c | 138 | |
f6ac5f3d PA |
139 | void fetch_registers (struct regcache *, int) override; |
140 | void store_registers (struct regcache *, int) override; | |
141 | void prepare_to_store (struct regcache *) override; | |
c906108c | 142 | |
f6ac5f3d PA |
143 | enum target_xfer_status xfer_partial (enum target_object object, |
144 | const char *annex, | |
145 | gdb_byte *readbuf, | |
146 | const gdb_byte *writebuf, | |
147 | ULONGEST offset, ULONGEST len, | |
148 | ULONGEST *xfered_len) override; | |
149 | ||
150 | void files_info () override; | |
151 | ||
152 | void kill () override; | |
153 | ||
154 | void load (const char *, int) override; | |
155 | ||
156 | bool can_create_inferior () override { return true; } | |
157 | void create_inferior (const char *, const std::string &, | |
158 | char **, int) override; | |
159 | ||
160 | void mourn_inferior () override; | |
161 | ||
162 | void interrupt () override; | |
163 | ||
57810aa7 | 164 | bool thread_alive (ptid_t ptid) override; |
c906108c | 165 | |
a068643d | 166 | std::string pid_to_str (ptid_t) override; |
f6ac5f3d | 167 | |
57810aa7 PA |
168 | bool has_all_memory () override; |
169 | bool has_memory () override; | |
e904f56d | 170 | std::vector<mem_region> memory_map () override; |
e0037b4c SM |
171 | |
172 | private: | |
173 | sim_inferior_data *get_inferior_data_by_ptid (ptid_t ptid, | |
174 | int sim_instance_needed); | |
175 | void resume_one_inferior (inferior *inf, bool step, gdb_signal siggnal); | |
176 | void close_one_inferior (inferior *inf); | |
f6ac5f3d PA |
177 | }; |
178 | ||
179 | static struct gdbsim_target gdbsim_ops; | |
c906108c | 180 | |
08b8a139 | 181 | static const registry<inferior>::key<sim_inferior_data> sim_inferior_data_key; |
18101a35 | 182 | |
db04efe6 KB |
183 | /* Flag indicating the "open" status of this module. It's set to 1 |
184 | in gdbsim_open() and 0 in gdbsim_close(). */ | |
185 | static int gdbsim_is_open = 0; | |
186 | ||
db04efe6 KB |
187 | /* Argument list to pass to sim_open(). It is allocated in gdbsim_open() |
188 | and deallocated in gdbsim_close(). The lifetime needs to extend beyond | |
189 | the call to gdbsim_open() due to the fact that other sim instances other | |
190 | than the first will be allocated after the gdbsim_open() call. */ | |
191 | static char **sim_argv = NULL; | |
192 | ||
193 | /* OS-level callback functions for write, flush, etc. */ | |
194 | static host_callback gdb_callback; | |
195 | static int callbacks_initialized = 0; | |
196 | ||
db04efe6 KB |
197 | /* Flags indicating whether or not a sim instance is needed. One of these |
198 | flags should be passed to get_sim_inferior_data(). */ | |
199 | ||
200 | enum {SIM_INSTANCE_NOT_NEEDED = 0, SIM_INSTANCE_NEEDED = 1}; | |
201 | ||
202 | /* Obtain pointer to per-inferior simulator data, allocating it if necessary. | |
203 | Attempt to open the sim if SIM_INSTANCE_NEEDED is true. */ | |
204 | ||
205 | static struct sim_inferior_data * | |
206 | get_sim_inferior_data (struct inferior *inf, int sim_instance_needed) | |
207 | { | |
208 | SIM_DESC sim_desc = NULL; | |
18101a35 | 209 | struct sim_inferior_data *sim_data = sim_inferior_data_key.get (inf); |
db04efe6 KB |
210 | |
211 | /* Try to allocate a new sim instance, if needed. We do this ahead of | |
212 | a potential allocation of a sim_inferior_data struct in order to | |
213 | avoid needlessly allocating that struct in the event that the sim | |
214 | instance allocation fails. */ | |
74228e77 | 215 | if (sim_instance_needed == SIM_INSTANCE_NEEDED |
db04efe6 KB |
216 | && (sim_data == NULL || sim_data->gdbsim_desc == NULL)) |
217 | { | |
7e10abd1 TT |
218 | sim_desc = sim_open (SIM_OPEN_DEBUG, &gdb_callback, |
219 | current_program_space->exec_bfd (), sim_argv); | |
db04efe6 KB |
220 | if (sim_desc == NULL) |
221 | error (_("Unable to create simulator instance for inferior %d."), | |
222 | inf->num); | |
223 | ||
b3ee6dd9 SM |
224 | /* Check if the sim descriptor is the same as that of another |
225 | inferior. */ | |
226 | for (inferior *other_inf : all_inferiors ()) | |
db04efe6 | 227 | { |
b3ee6dd9 SM |
228 | sim_inferior_data *other_sim_data |
229 | = sim_inferior_data_key.get (other_inf); | |
230 | ||
231 | if (other_sim_data != NULL | |
232 | && other_sim_data->gdbsim_desc == sim_desc) | |
233 | { | |
234 | /* We don't close the descriptor due to the fact that it's | |
235 | shared with some other inferior. If we were to close it, | |
236 | that might needlessly muck up the other inferior. Of | |
237 | course, it's possible that the damage has already been | |
238 | done... Note that it *will* ultimately be closed during | |
239 | cleanup of the other inferior. */ | |
240 | sim_desc = NULL; | |
241 | error ( | |
242 | _("Inferior %d and inferior %d would have identical simulator state.\n" | |
243 | "(This simulator does not support the running of more than one inferior.)"), | |
244 | inf->num, other_inf->num); | |
245 | } | |
74228e77 | 246 | } |
db04efe6 KB |
247 | } |
248 | ||
249 | if (sim_data == NULL) | |
250 | { | |
18101a35 | 251 | sim_data = sim_inferior_data_key.emplace (inf, sim_desc); |
db04efe6 KB |
252 | } |
253 | else if (sim_desc) | |
254 | { | |
255 | /* This handles the case where sim_data was allocated prior to | |
74228e77 | 256 | needing a sim instance. */ |
db04efe6 KB |
257 | sim_data->gdbsim_desc = sim_desc; |
258 | } | |
c906108c | 259 | |
c906108c | 260 | |
db04efe6 KB |
261 | return sim_data; |
262 | } | |
263 | ||
264 | /* Return pointer to per-inferior simulator data using PTID to find the | |
265 | inferior in question. Return NULL when no inferior is found or | |
266 | when ptid has a zero or negative pid component. */ | |
267 | ||
e0037b4c SM |
268 | sim_inferior_data * |
269 | gdbsim_target::get_inferior_data_by_ptid (ptid_t ptid, | |
270 | int sim_instance_needed) | |
db04efe6 KB |
271 | { |
272 | struct inferior *inf; | |
e99b03dc | 273 | int pid = ptid.pid (); |
db04efe6 KB |
274 | |
275 | if (pid <= 0) | |
276 | return NULL; | |
74228e77 | 277 | |
e0037b4c | 278 | inf = find_inferior_pid (this, pid); |
db04efe6 KB |
279 | |
280 | if (inf) | |
281 | return get_sim_inferior_data (inf, sim_instance_needed); | |
282 | else | |
283 | return NULL; | |
284 | } | |
285 | ||
286 | /* Free the per-inferior simulator data. */ | |
287 | ||
18101a35 | 288 | sim_inferior_data::~sim_inferior_data () |
db04efe6 | 289 | { |
18101a35 TT |
290 | if (gdbsim_desc) |
291 | sim_close (gdbsim_desc, 0); | |
db04efe6 | 292 | } |
9de2bdd7 | 293 | |
c906108c | 294 | static void |
146ec4db | 295 | dump_mem (const gdb_byte *buf, int len) |
c906108c | 296 | { |
0426ad51 | 297 | gdb_puts ("\t", gdb_stdlog); |
3d468296 AB |
298 | |
299 | if (len == 8 || len == 4) | |
c906108c | 300 | { |
3d468296 | 301 | uint32_t l[2]; |
123f5f96 | 302 | |
3d468296 | 303 | memcpy (l, buf, len); |
6cb06a8c | 304 | gdb_printf (gdb_stdlog, "0x%08x", l[0]); |
3d468296 | 305 | if (len == 8) |
6cb06a8c | 306 | gdb_printf (gdb_stdlog, " 0x%08x", l[1]); |
3d468296 AB |
307 | } |
308 | else | |
309 | { | |
310 | int i; | |
123f5f96 | 311 | |
3d468296 | 312 | for (i = 0; i < len; i++) |
6cb06a8c | 313 | gdb_printf (gdb_stdlog, "0x%02x ", buf[i]); |
c906108c | 314 | } |
3d468296 | 315 | |
0426ad51 | 316 | gdb_puts ("\n", gdb_stdlog); |
c906108c SS |
317 | } |
318 | ||
c906108c SS |
319 | /* Initialize gdb_callback. */ |
320 | ||
321 | static void | |
fba45db2 | 322 | init_callbacks (void) |
c906108c | 323 | { |
c5aa993b | 324 | if (!callbacks_initialized) |
c906108c SS |
325 | { |
326 | gdb_callback = default_callback; | |
327 | gdb_callback.init (&gdb_callback); | |
328 | gdb_callback.write_stdout = gdb_os_write_stdout; | |
329 | gdb_callback.flush_stdout = gdb_os_flush_stdout; | |
330 | gdb_callback.write_stderr = gdb_os_write_stderr; | |
331 | gdb_callback.flush_stderr = gdb_os_flush_stderr; | |
332 | gdb_callback.printf_filtered = gdb_os_printf_filtered; | |
333 | gdb_callback.vprintf_filtered = gdb_os_vprintf_filtered; | |
334 | gdb_callback.evprintf_filtered = gdb_os_evprintf_filtered; | |
335 | gdb_callback.error = gdb_os_error; | |
336 | gdb_callback.poll_quit = gdb_os_poll_quit; | |
337 | gdb_callback.magic = HOST_CALLBACK_MAGIC; | |
338 | callbacks_initialized = 1; | |
339 | } | |
340 | } | |
341 | ||
342 | /* Release callbacks (free resources used by them). */ | |
343 | ||
344 | static void | |
fba45db2 | 345 | end_callbacks (void) |
c906108c SS |
346 | { |
347 | if (callbacks_initialized) | |
348 | { | |
349 | gdb_callback.shutdown (&gdb_callback); | |
350 | callbacks_initialized = 0; | |
351 | } | |
352 | } | |
353 | ||
354 | /* GDB version of os_write_stdout callback. */ | |
355 | ||
c5aa993b | 356 | static int |
fba45db2 | 357 | gdb_os_write_stdout (host_callback *p, const char *buf, int len) |
c906108c | 358 | { |
da5bd37e | 359 | gdb_stdtarg->write (buf, len); |
c906108c SS |
360 | return len; |
361 | } | |
362 | ||
363 | /* GDB version of os_flush_stdout callback. */ | |
364 | ||
365 | static void | |
fba45db2 | 366 | gdb_os_flush_stdout (host_callback *p) |
c906108c | 367 | { |
da5bd37e | 368 | gdb_stdtarg->flush (); |
c906108c SS |
369 | } |
370 | ||
371 | /* GDB version of os_write_stderr callback. */ | |
372 | ||
c5aa993b | 373 | static int |
fba45db2 | 374 | gdb_os_write_stderr (host_callback *p, const char *buf, int len) |
c906108c SS |
375 | { |
376 | int i; | |
377 | char b[2]; | |
378 | ||
c5aa993b | 379 | for (i = 0; i < len; i++) |
c906108c SS |
380 | { |
381 | b[0] = buf[i]; | |
382 | b[1] = 0; | |
da5bd37e | 383 | gdb_stdtargerr->puts (b); |
c906108c SS |
384 | } |
385 | return len; | |
386 | } | |
387 | ||
388 | /* GDB version of os_flush_stderr callback. */ | |
389 | ||
390 | static void | |
fba45db2 | 391 | gdb_os_flush_stderr (host_callback *p) |
c906108c | 392 | { |
da5bd37e | 393 | gdb_stdtargerr->flush (); |
c906108c SS |
394 | } |
395 | ||
6cb06a8c | 396 | /* GDB version of gdb_printf callback. */ |
c906108c | 397 | |
7104e59b SM |
398 | static void ATTRIBUTE_PRINTF (2, 3) |
399 | gdb_os_printf_filtered (host_callback * p, const char *format, ...) | |
c906108c SS |
400 | { |
401 | va_list args; | |
c906108c | 402 | |
123f5f96 | 403 | va_start (args, format); |
19a7b8ab | 404 | gdb_vprintf (gdb_stdout, format, args); |
c906108c SS |
405 | va_end (args); |
406 | } | |
407 | ||
19a7b8ab | 408 | /* GDB version of error gdb_vprintf. */ |
c906108c | 409 | |
7104e59b | 410 | static void ATTRIBUTE_PRINTF (2, 0) |
c5aa993b | 411 | gdb_os_vprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c | 412 | { |
19a7b8ab | 413 | gdb_vprintf (gdb_stdout, format, ap); |
c906108c SS |
414 | } |
415 | ||
416 | /* GDB version of error evprintf_filtered. */ | |
417 | ||
7104e59b | 418 | static void ATTRIBUTE_PRINTF (2, 0) |
c5aa993b | 419 | gdb_os_evprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c | 420 | { |
19a7b8ab | 421 | gdb_vprintf (gdb_stderr, format, ap); |
c906108c SS |
422 | } |
423 | ||
424 | /* GDB version of error callback. */ | |
425 | ||
7104e59b | 426 | static void ATTRIBUTE_PRINTF (2, 3) |
58d4abe1 | 427 | gdb_os_error (host_callback * p, const char *format, ...) |
c906108c | 428 | { |
58d4abe1 | 429 | va_list args; |
123f5f96 | 430 | |
58d4abe1 PA |
431 | va_start (args, format); |
432 | verror (format, args); | |
433 | va_end (args); | |
c906108c SS |
434 | } |
435 | ||
8238d0bf | 436 | int |
e7faf938 | 437 | one2one_register_sim_regno (struct gdbarch *gdbarch, int regnum) |
8238d0bf AC |
438 | { |
439 | /* Only makes sense to supply raw registers. */ | |
e7faf938 | 440 | gdb_assert (regnum >= 0 && regnum < gdbarch_num_regs (gdbarch)); |
8238d0bf AC |
441 | return regnum; |
442 | } | |
443 | ||
f6ac5f3d PA |
444 | void |
445 | gdbsim_target::fetch_registers (struct regcache *regcache, int regno) | |
c906108c | 446 | { |
ac7936df | 447 | struct gdbarch *gdbarch = regcache->arch (); |
e0037b4c | 448 | struct inferior *inf = find_inferior_ptid (this, regcache->ptid ()); |
db04efe6 | 449 | struct sim_inferior_data *sim_data |
bcc0c096 | 450 | = get_sim_inferior_data (inf, SIM_INSTANCE_NEEDED); |
123f5f96 | 451 | |
c5aa993b | 452 | if (regno == -1) |
c906108c | 453 | { |
40a6adc1 | 454 | for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++) |
f6ac5f3d | 455 | fetch_registers (regcache, regno); |
8238d0bf | 456 | return; |
c906108c | 457 | } |
8238d0bf | 458 | |
40a6adc1 | 459 | switch (gdbarch_register_sim_regno (gdbarch, regno)) |
c906108c | 460 | { |
8238d0bf AC |
461 | case LEGACY_SIM_REGNO_IGNORE: |
462 | break; | |
463 | case SIM_REGNO_DOES_NOT_EXIST: | |
464 | { | |
465 | /* For moment treat a `does not exist' register the same way | |
74228e77 | 466 | as an ``unavailable'' register. */ |
a4d1e79a | 467 | regcache->raw_supply_zeroed (regno); |
8238d0bf AC |
468 | break; |
469 | } | |
74228e77 | 470 | |
8238d0bf AC |
471 | default: |
472 | { | |
473 | static int warn_user = 1; | |
a4d1e79a AH |
474 | int regsize = register_size (gdbarch, regno); |
475 | gdb::byte_vector buf (regsize, 0); | |
8238d0bf | 476 | int nr_bytes; |
123f5f96 | 477 | |
40a6adc1 | 478 | gdb_assert (regno >= 0 && regno < gdbarch_num_regs (gdbarch)); |
db04efe6 | 479 | nr_bytes = sim_fetch_register (sim_data->gdbsim_desc, |
474c1661 | 480 | gdbarch_register_sim_regno |
40a6adc1 | 481 | (gdbarch, regno), |
a4d1e79a AH |
482 | buf.data (), regsize); |
483 | if (nr_bytes > 0 && nr_bytes != regsize && warn_user) | |
8238d0bf | 484 | { |
6cb06a8c TT |
485 | gdb_printf (gdb_stderr, |
486 | "Size of register %s (%d/%d) " | |
487 | "incorrect (%d instead of %d))", | |
488 | gdbarch_register_name (gdbarch, regno), | |
489 | regno, | |
490 | gdbarch_register_sim_regno (gdbarch, regno), | |
491 | nr_bytes, regsize); | |
8238d0bf AC |
492 | warn_user = 0; |
493 | } | |
494 | /* FIXME: cagney/2002-05-27: Should check `nr_bytes == 0' | |
278a7cf7 | 495 | indicating that GDB and the SIM have different ideas about |
8238d0bf AC |
496 | which registers are fetchable. */ |
497 | /* Else if (nr_bytes < 0): an old simulator, that doesn't | |
498 | think to return the register size. Just assume all is ok. */ | |
a4d1e79a | 499 | regcache->raw_supply (regno, buf.data ()); |
ea35711c | 500 | if (remote_debug) |
8238d0bf | 501 | { |
6cb06a8c TT |
502 | gdb_printf (gdb_stdlog, |
503 | "gdbsim_fetch_register: %d", regno); | |
8238d0bf | 504 | /* FIXME: We could print something more intelligible. */ |
a4d1e79a | 505 | dump_mem (buf.data (), regsize); |
8238d0bf AC |
506 | } |
507 | break; | |
508 | } | |
c906108c SS |
509 | } |
510 | } | |
511 | ||
512 | ||
f6ac5f3d PA |
513 | void |
514 | gdbsim_target::store_registers (struct regcache *regcache, int regno) | |
c906108c | 515 | { |
ac7936df | 516 | struct gdbarch *gdbarch = regcache->arch (); |
e0037b4c | 517 | struct inferior *inf = find_inferior_ptid (this, regcache->ptid ()); |
db04efe6 | 518 | struct sim_inferior_data *sim_data |
bcc0c096 | 519 | = get_sim_inferior_data (inf, SIM_INSTANCE_NEEDED); |
db04efe6 | 520 | |
c5aa993b | 521 | if (regno == -1) |
c906108c | 522 | { |
40a6adc1 | 523 | for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++) |
f6ac5f3d | 524 | store_registers (regcache, regno); |
8238d0bf | 525 | return; |
c906108c | 526 | } |
40a6adc1 | 527 | else if (gdbarch_register_sim_regno (gdbarch, regno) >= 0) |
c906108c | 528 | { |
a4d1e79a AH |
529 | int regsize = register_size (gdbarch, regno); |
530 | gdb::byte_vector tmp (regsize); | |
c906108c | 531 | int nr_bytes; |
123f5f96 | 532 | |
a4d1e79a | 533 | regcache->cooked_read (regno, tmp.data ()); |
db04efe6 | 534 | nr_bytes = sim_store_register (sim_data->gdbsim_desc, |
474c1661 | 535 | gdbarch_register_sim_regno |
40a6adc1 | 536 | (gdbarch, regno), |
a4d1e79a AH |
537 | tmp.data (), regsize); |
538 | ||
539 | if (nr_bytes > 0 && nr_bytes != regsize) | |
f34652de | 540 | internal_error (_("Register size different to expected")); |
dae477fe | 541 | if (nr_bytes < 0) |
f34652de | 542 | internal_error (_("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 | { |
6cb06a8c | 549 | gdb_printf (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) |
6cb06a8c | 563 | gdb_printf (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) |
6cb06a8c | 592 | gdb_printf (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) |
6cb06a8c TT |
632 | gdb_printf (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 KB |
681 | struct sim_inferior_data *sim_data; |
682 | SIM_DESC gdbsim_desc; | |
c906108c | 683 | |
abe19f11 | 684 | const char *sysroot = gdb_sysroot.c_str (); |
87d1b309 MF |
685 | if (is_target_filename (sysroot)) |
686 | sysroot += strlen (TARGET_SYSROOT_PREFIX); | |
687 | ||
ea35711c | 688 | if (remote_debug) |
6cb06a8c TT |
689 | gdb_printf (gdb_stdlog, |
690 | "gdbsim_open: args \"%s\"\n", args ? args : "(null)"); | |
c906108c | 691 | |
db04efe6 KB |
692 | /* Ensure that the sim target is not on the target stack. This is |
693 | necessary, because if it is on the target stack, the call to | |
694 | push_target below will invoke sim_close(), thus freeing various | |
695 | state (including a sim instance) that we allocate prior to | |
696 | invoking push_target(). We want to delay the push_target() | |
697 | operation until after we complete those operations which could | |
698 | error out. */ | |
699 | if (gdbsim_is_open) | |
fadf6add | 700 | current_inferior ()->unpush_target (&gdbsim_ops); |
c906108c | 701 | |
c5aa993b | 702 | len = (7 + 1 /* gdbsim */ |
c906108c SS |
703 | + strlen (" -E little") |
704 | + strlen (" --architecture=xxxxxxxxxx") | |
abe19f11 | 705 | + strlen (" --sysroot=") + strlen (sysroot) + |
c906108c | 706 | + (args ? strlen (args) : 0) |
c5aa993b | 707 | + 50) /* slack */ ; |
c906108c | 708 | arg_buf = (char *) alloca (len); |
c5aa993b | 709 | strcpy (arg_buf, "gdbsim"); /* 7 */ |
b6d373df | 710 | /* Specify the byte order for the target when it is explicitly |
0df8b418 | 711 | specified by the user (not auto detected). */ |
b6d373df | 712 | switch (selected_byte_order ()) |
c906108c | 713 | { |
a8cf2722 AC |
714 | case BFD_ENDIAN_BIG: |
715 | strcat (arg_buf, " -E big"); | |
716 | break; | |
717 | case BFD_ENDIAN_LITTLE: | |
718 | strcat (arg_buf, " -E little"); | |
719 | break; | |
720 | case BFD_ENDIAN_UNKNOWN: | |
721 | break; | |
c906108c SS |
722 | } |
723 | /* Specify the architecture of the target when it has been | |
724 | explicitly specified */ | |
a8cf2722 | 725 | if (selected_architecture_name () != NULL) |
c906108c SS |
726 | { |
727 | strcat (arg_buf, " --architecture="); | |
a8cf2722 | 728 | strcat (arg_buf, selected_architecture_name ()); |
c906108c | 729 | } |
f4b8c29b MF |
730 | /* Pass along gdb's concept of the sysroot. */ |
731 | strcat (arg_buf, " --sysroot="); | |
abe19f11 | 732 | strcat (arg_buf, sysroot); |
c906108c SS |
733 | /* finally, any explicit args */ |
734 | if (args) | |
735 | { | |
c5aa993b | 736 | strcat (arg_buf, " "); /* 1 */ |
c906108c SS |
737 | strcat (arg_buf, args); |
738 | } | |
773a1edc | 739 | |
74cbb09e | 740 | gdb_argv argv (arg_buf); |
67a3048c | 741 | sim_argv = argv.release (); |
c906108c SS |
742 | |
743 | init_callbacks (); | |
7e10abd1 TT |
744 | gdbsim_desc = sim_open (SIM_OPEN_DEBUG, &gdb_callback, |
745 | current_program_space->exec_bfd (), sim_argv); | |
c906108c SS |
746 | |
747 | if (gdbsim_desc == 0) | |
db04efe6 | 748 | { |
67a3048c | 749 | freeargv (sim_argv); |
db04efe6 KB |
750 | sim_argv = NULL; |
751 | error (_("unable to create simulator instance")); | |
752 | } | |
753 | ||
754 | /* Reset the pid numberings for this batch of sim instances. */ | |
755 | next_pid = INITIAL_PID; | |
756 | ||
757 | /* Allocate the inferior data, but do not allocate a sim instance | |
758 | since we've already just done that. */ | |
0df8b418 MS |
759 | sim_data = get_sim_inferior_data (current_inferior (), |
760 | SIM_INSTANCE_NOT_NEEDED); | |
db04efe6 KB |
761 | |
762 | sim_data->gdbsim_desc = gdbsim_desc; | |
c906108c | 763 | |
02980c56 | 764 | current_inferior ()->push_target (&gdbsim_ops); |
6cb06a8c | 765 | gdb_printf ("Connected to the simulator.\n"); |
52bb452f DJ |
766 | |
767 | /* There's nothing running after "target sim" or "load"; not until | |
768 | "run". */ | |
191f02e5 | 769 | switch_to_no_thread (); |
db04efe6 KB |
770 | |
771 | gdbsim_is_open = 1; | |
772 | } | |
773 | ||
e0037b4c | 774 | /* Helper for gdbsim_target::close. */ |
db04efe6 | 775 | |
e0037b4c SM |
776 | void |
777 | gdbsim_target::close_one_inferior (inferior *inf) | |
db04efe6 | 778 | { |
18101a35 | 779 | struct sim_inferior_data *sim_data = sim_inferior_data_key.get (inf); |
db04efe6 KB |
780 | if (sim_data != NULL) |
781 | { | |
782 | ptid_t ptid = sim_data->remote_sim_ptid; | |
783 | ||
18101a35 | 784 | sim_inferior_data_key.clear (inf); |
db04efe6 KB |
785 | |
786 | /* Having a ptid allocated and stored in remote_sim_ptid does | |
0df8b418 | 787 | not mean that a corresponding inferior was ever created. |
db04efe6 KB |
788 | Thus we need to verify the existence of an inferior using the |
789 | pid in question before setting inferior_ptid via | |
790 | switch_to_thread() or mourning the inferior. */ | |
e0037b4c | 791 | if (find_inferior_ptid (this, ptid) != NULL) |
db04efe6 | 792 | { |
e0037b4c | 793 | switch_to_thread (this, ptid); |
db04efe6 KB |
794 | generic_mourn_inferior (); |
795 | } | |
796 | } | |
c906108c SS |
797 | } |
798 | ||
0df8b418 | 799 | /* Close out all files and local state before this target loses control. */ |
c906108c | 800 | |
f6ac5f3d PA |
801 | void |
802 | gdbsim_target::close () | |
c906108c | 803 | { |
ea35711c | 804 | if (remote_debug) |
6cb06a8c | 805 | gdb_printf (gdb_stdlog, "gdbsim_close\n"); |
c906108c | 806 | |
e0037b4c SM |
807 | for (inferior *inf : all_inferiors (this)) |
808 | close_one_inferior (inf); | |
c906108c | 809 | |
db04efe6 | 810 | if (sim_argv != NULL) |
c906108c | 811 | { |
db04efe6 KB |
812 | freeargv (sim_argv); |
813 | sim_argv = NULL; | |
c906108c SS |
814 | } |
815 | ||
816 | end_callbacks (); | |
db04efe6 KB |
817 | |
818 | gdbsim_is_open = 0; | |
c906108c SS |
819 | } |
820 | ||
821 | /* Takes a program previously attached to and detaches it. | |
822 | The program may resume execution (some targets do, some don't) and will | |
823 | no longer stop on signals, etc. We better not have left any breakpoints | |
6bd6f3b6 SM |
824 | in the program or it'll die when it hits one. FROM_TTY says whether to be |
825 | verbose or not. */ | |
c906108c SS |
826 | /* Terminate the open connection to the remote debugger. |
827 | Use this when you want to detach and do something else with your gdb. */ | |
828 | ||
f6ac5f3d PA |
829 | void |
830 | gdbsim_target::detach (inferior *inf, int from_tty) | |
c906108c | 831 | { |
ea35711c | 832 | if (remote_debug) |
6cb06a8c | 833 | gdb_printf (gdb_stdlog, "gdbsim_detach\n"); |
c906108c | 834 | |
fadf6add | 835 | inf->unpush_target (this); /* calls gdbsim_close to do the real work */ |
c906108c | 836 | if (from_tty) |
6cb06a8c | 837 | gdb_printf ("Ending simulator %s debugging\n", target_shortname ()); |
c906108c | 838 | } |
c5aa993b | 839 | |
c906108c SS |
840 | /* Resume execution of the target process. STEP says whether to single-step |
841 | or to run free; SIGGNAL is the signal value (e.g. SIGINT) to be given | |
842 | to the target, or zero for no signal. */ | |
843 | ||
e0037b4c SM |
844 | void |
845 | gdbsim_target::resume_one_inferior (inferior *inf, bool step, | |
846 | gdb_signal siggnal) | |
db04efe6 KB |
847 | { |
848 | struct sim_inferior_data *sim_data | |
849 | = get_sim_inferior_data (inf, SIM_INSTANCE_NOT_NEEDED); | |
db04efe6 KB |
850 | |
851 | if (sim_data) | |
852 | { | |
e0037b4c SM |
853 | sim_data->resume_siggnal = siggnal; |
854 | sim_data->resume_step = step; | |
db04efe6 KB |
855 | |
856 | if (remote_debug) | |
6cb06a8c TT |
857 | gdb_printf (gdb_stdlog, |
858 | _("gdbsim_resume: pid %d, step %d, signal %d\n"), | |
859 | inf->pid, step, siggnal); | |
db04efe6 | 860 | } |
db04efe6 | 861 | } |
c906108c | 862 | |
f6ac5f3d PA |
863 | void |
864 | gdbsim_target::resume (ptid_t ptid, int step, enum gdb_signal siggnal) | |
c906108c | 865 | { |
db04efe6 | 866 | struct sim_inferior_data *sim_data |
e0037b4c | 867 | = get_inferior_data_by_ptid (ptid, SIM_INSTANCE_NOT_NEEDED); |
db04efe6 | 868 | |
0df8b418 | 869 | /* We don't access any sim_data members within this function. |
db04efe6 KB |
870 | What's of interest is whether or not the call to |
871 | get_sim_inferior_data_by_ptid(), above, is able to obtain a | |
872 | non-NULL pointer. If it managed to obtain a non-NULL pointer, we | |
873 | know we have a single inferior to consider. If it's NULL, we | |
874 | either have multiple inferiors to resume or an error condition. */ | |
875 | ||
876 | if (sim_data) | |
e0037b4c | 877 | resume_one_inferior (find_inferior_ptid (this, ptid), step, siggnal); |
d7e15655 | 878 | else if (ptid == minus_one_ptid) |
e0037b4c SM |
879 | { |
880 | for (inferior *inf : all_inferiors (this)) | |
881 | resume_one_inferior (inf, step, siggnal); | |
882 | } | |
db04efe6 | 883 | else |
8a3fe4f8 | 884 | error (_("The program is not being run.")); |
c906108c SS |
885 | } |
886 | ||
bfedc46a | 887 | /* Notify the simulator of an asynchronous request to interrupt. |
c5aa993b | 888 | |
bfedc46a | 889 | The simulator shall ensure that the interrupt request is eventually |
c906108c | 890 | delivered to the simulator. If the call is made while the |
bfedc46a | 891 | simulator is not running then the interrupt request is processed when |
c906108c SS |
892 | the simulator is next resumed. |
893 | ||
db04efe6 KB |
894 | For simulators that do not support this operation, just abort. */ |
895 | ||
b3ee6dd9 SM |
896 | void |
897 | gdbsim_target::interrupt () | |
db04efe6 | 898 | { |
b3ee6dd9 | 899 | for (inferior *inf : all_inferiors ()) |
db04efe6 | 900 | { |
b3ee6dd9 SM |
901 | sim_inferior_data *sim_data |
902 | = get_sim_inferior_data (inf, SIM_INSTANCE_NEEDED); | |
903 | ||
904 | if (sim_data != nullptr && !sim_stop (sim_data->gdbsim_desc)) | |
db04efe6 | 905 | quit (); |
db04efe6 | 906 | } |
c906108c SS |
907 | } |
908 | ||
909 | /* GDB version of os_poll_quit callback. | |
8a0ce09a | 910 | Taken from gdb/util.c - should be in a library. */ |
c906108c SS |
911 | |
912 | static int | |
fba45db2 | 913 | gdb_os_poll_quit (host_callback *p) |
c906108c | 914 | { |
98bbd631 AC |
915 | if (deprecated_ui_loop_hook != NULL) |
916 | deprecated_ui_loop_hook (0); | |
7a292a7a | 917 | |
522002f9 | 918 | if (check_quit_flag ()) /* gdb's idea of quit */ |
abf009ef | 919 | return 1; |
c906108c SS |
920 | return 0; |
921 | } | |
922 | ||
923 | /* Wait for inferior process to do something. Return pid of child, | |
924 | or -1 in case of error; store status through argument pointer STATUS, | |
0df8b418 | 925 | just as `wait' would. */ |
c906108c SS |
926 | |
927 | static void | |
fba45db2 | 928 | gdbsim_cntrl_c (int signo) |
c906108c | 929 | { |
f6ac5f3d | 930 | gdbsim_ops.interrupt (); |
c906108c SS |
931 | } |
932 | ||
f6ac5f3d | 933 | ptid_t |
b60cea74 TT |
934 | gdbsim_target::wait (ptid_t ptid, struct target_waitstatus *status, |
935 | target_wait_flags options) | |
c906108c | 936 | { |
db04efe6 | 937 | struct sim_inferior_data *sim_data; |
a40805d4 | 938 | static sighandler_t prev_sigint; |
c906108c SS |
939 | int sigrc = 0; |
940 | enum sim_stop reason = sim_running; | |
941 | ||
db04efe6 KB |
942 | /* This target isn't able to (yet) resume more than one inferior at a time. |
943 | When ptid is minus_one_ptid, just use the current inferior. If we're | |
944 | given an explicit pid, we'll try to find it and use that instead. */ | |
d7e15655 | 945 | if (ptid == minus_one_ptid) |
0df8b418 MS |
946 | sim_data = get_sim_inferior_data (current_inferior (), |
947 | SIM_INSTANCE_NEEDED); | |
db04efe6 KB |
948 | else |
949 | { | |
e0037b4c | 950 | sim_data = get_inferior_data_by_ptid (ptid, SIM_INSTANCE_NEEDED); |
db04efe6 KB |
951 | if (sim_data == NULL) |
952 | error (_("Unable to wait for pid %d. Inferior not found."), | |
e99b03dc | 953 | ptid.pid ()); |
db04efe6 KB |
954 | } |
955 | ||
ea35711c | 956 | if (remote_debug) |
6cb06a8c | 957 | gdb_printf (gdb_stdlog, "gdbsim_wait\n"); |
c906108c SS |
958 | |
959 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) | |
960 | { | |
961 | struct sigaction sa, osa; | |
962 | sa.sa_handler = gdbsim_cntrl_c; | |
963 | sigemptyset (&sa.sa_mask); | |
964 | sa.sa_flags = 0; | |
965 | sigaction (SIGINT, &sa, &osa); | |
966 | prev_sigint = osa.sa_handler; | |
967 | } | |
968 | #else | |
969 | prev_sigint = signal (SIGINT, gdbsim_cntrl_c); | |
970 | #endif | |
db04efe6 | 971 | sim_resume (sim_data->gdbsim_desc, sim_data->resume_step, |
74228e77 | 972 | sim_data->resume_siggnal); |
db04efe6 | 973 | |
c906108c | 974 | signal (SIGINT, prev_sigint); |
db04efe6 | 975 | sim_data->resume_step = 0; |
c906108c | 976 | |
db04efe6 | 977 | sim_stop_reason (sim_data->gdbsim_desc, &reason, &sigrc); |
c906108c SS |
978 | |
979 | switch (reason) | |
980 | { | |
981 | case sim_exited: | |
66cc0442 | 982 | status->set_exited (sigrc); |
c906108c SS |
983 | break; |
984 | case sim_stopped: | |
985 | switch (sigrc) | |
986 | { | |
a493e3e2 | 987 | case GDB_SIGNAL_ABRT: |
c906108c SS |
988 | quit (); |
989 | break; | |
a493e3e2 PA |
990 | case GDB_SIGNAL_INT: |
991 | case GDB_SIGNAL_TRAP: | |
c906108c | 992 | default: |
66cc0442 | 993 | status->set_stopped ((gdb_signal) sigrc); |
c906108c SS |
994 | break; |
995 | } | |
996 | break; | |
997 | case sim_signalled: | |
66cc0442 | 998 | status->set_signalled ((gdb_signal) sigrc); |
c906108c SS |
999 | break; |
1000 | case sim_running: | |
1001 | case sim_polling: | |
0df8b418 | 1002 | /* FIXME: Is this correct? */ |
c906108c SS |
1003 | break; |
1004 | } | |
1005 | ||
cf1d9e09 | 1006 | return sim_data->remote_sim_ptid; |
c906108c SS |
1007 | } |
1008 | ||
1009 | /* Get ready to modify the registers array. On machines which store | |
1010 | individual registers, this doesn't need to do anything. On machines | |
1011 | which store all the registers in one fell swoop, this makes sure | |
1012 | that registers contains all the registers from the program being | |
1013 | debugged. */ | |
1014 | ||
f6ac5f3d PA |
1015 | void |
1016 | gdbsim_target::prepare_to_store (struct regcache *regcache) | |
c906108c | 1017 | { |
0df8b418 | 1018 | /* Do nothing, since we can store individual regs. */ |
c906108c SS |
1019 | } |
1020 | ||
146ec4db PA |
1021 | /* Helper for gdbsim_xfer_partial that handles memory transfers. |
1022 | Arguments are like target_xfer_partial. */ | |
d93bce06 | 1023 | |
9b409511 | 1024 | static enum target_xfer_status |
146ec4db PA |
1025 | gdbsim_xfer_memory (struct target_ops *target, |
1026 | gdb_byte *readbuf, const gdb_byte *writebuf, | |
9b409511 | 1027 | ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len) |
c906108c | 1028 | { |
db04efe6 KB |
1029 | struct sim_inferior_data *sim_data |
1030 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
b55e14c7 | 1031 | int l; |
db04efe6 | 1032 | |
0c012db1 KB |
1033 | /* If this target doesn't have memory yet, return 0 causing the |
1034 | request to be passed to a lower target, hopefully an exec | |
1035 | file. */ | |
f6ac5f3d | 1036 | if (!target->has_memory ()) |
9b409511 | 1037 | return TARGET_XFER_EOF; |
52bb452f | 1038 | |
db04efe6 | 1039 | if (!sim_data->program_loaded) |
8a3fe4f8 | 1040 | error (_("No program loaded.")); |
c906108c | 1041 | |
db04efe6 KB |
1042 | /* Note that we obtained the sim_data pointer above using |
1043 | SIM_INSTANCE_NOT_NEEDED. We do this so that we don't needlessly | |
1044 | allocate a sim instance prior to loading a program. If we | |
1045 | get to this point in the code though, gdbsim_desc should be | |
1046 | non-NULL. (Note that a sim instance is needed in order to load | |
1047 | the program...) */ | |
1048 | gdb_assert (sim_data->gdbsim_desc != NULL); | |
1049 | ||
ea35711c | 1050 | if (remote_debug) |
6cb06a8c TT |
1051 | gdb_printf (gdb_stdlog, |
1052 | "gdbsim_xfer_memory: readbuf %s, writebuf %s, " | |
1053 | "memaddr %s, len %s\n", | |
1054 | host_address_to_string (readbuf), | |
1055 | host_address_to_string (writebuf), | |
1056 | paddress (target_gdbarch (), memaddr), | |
1057 | pulongest (len)); | |
c906108c | 1058 | |
146ec4db | 1059 | if (writebuf) |
c906108c | 1060 | { |
fcde0081 | 1061 | if (remote_debug && len > 0) |
146ec4db | 1062 | dump_mem (writebuf, len); |
b55e14c7 | 1063 | l = sim_write (sim_data->gdbsim_desc, memaddr, writebuf, len); |
c906108c | 1064 | } |
c5aa993b | 1065 | else |
c906108c | 1066 | { |
b55e14c7 | 1067 | l = sim_read (sim_data->gdbsim_desc, memaddr, readbuf, len); |
ea35711c | 1068 | if (remote_debug && len > 0) |
146ec4db | 1069 | dump_mem (readbuf, len); |
c5aa993b | 1070 | } |
9b409511 YQ |
1071 | if (l > 0) |
1072 | { | |
1073 | *xfered_len = (ULONGEST) l; | |
1074 | return TARGET_XFER_OK; | |
1075 | } | |
1076 | else if (l == 0) | |
1077 | return TARGET_XFER_EOF; | |
1078 | else | |
1079 | return TARGET_XFER_E_IO; | |
c906108c SS |
1080 | } |
1081 | ||
146ec4db PA |
1082 | /* Target to_xfer_partial implementation. */ |
1083 | ||
f6ac5f3d PA |
1084 | enum target_xfer_status |
1085 | gdbsim_target::xfer_partial (enum target_object object, | |
1086 | const char *annex, gdb_byte *readbuf, | |
1087 | const gdb_byte *writebuf, ULONGEST offset, ULONGEST len, | |
1088 | ULONGEST *xfered_len) | |
146ec4db PA |
1089 | { |
1090 | switch (object) | |
1091 | { | |
1092 | case TARGET_OBJECT_MEMORY: | |
f6ac5f3d | 1093 | return gdbsim_xfer_memory (this, readbuf, writebuf, offset, len, |
9b409511 | 1094 | xfered_len); |
146ec4db PA |
1095 | |
1096 | default: | |
2ed4b548 | 1097 | return TARGET_XFER_E_IO; |
146ec4db PA |
1098 | } |
1099 | } | |
1100 | ||
f6ac5f3d PA |
1101 | void |
1102 | gdbsim_target::files_info () | |
c906108c | 1103 | { |
db04efe6 KB |
1104 | struct sim_inferior_data *sim_data |
1105 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NEEDED); | |
0d18d720 | 1106 | const char *file = "nothing"; |
c906108c | 1107 | |
7e10abd1 TT |
1108 | if (current_program_space->exec_bfd ()) |
1109 | file = bfd_get_filename (current_program_space->exec_bfd ()); | |
c906108c | 1110 | |
ea35711c | 1111 | if (remote_debug) |
6cb06a8c | 1112 | gdb_printf (gdb_stdlog, "gdbsim_files_info: file \"%s\"\n", file); |
c906108c | 1113 | |
7e10abd1 | 1114 | if (current_program_space->exec_bfd ()) |
c906108c | 1115 | { |
6cb06a8c TT |
1116 | gdb_printf ("\tAttached to %s running program %s\n", |
1117 | target_shortname (), file); | |
db04efe6 | 1118 | sim_info (sim_data->gdbsim_desc, 0); |
c906108c SS |
1119 | } |
1120 | } | |
1121 | ||
1122 | /* Clear the simulator's notion of what the break points are. */ | |
1123 | ||
f6ac5f3d PA |
1124 | void |
1125 | gdbsim_target::mourn_inferior () | |
c5aa993b | 1126 | { |
ea35711c | 1127 | if (remote_debug) |
6cb06a8c | 1128 | gdb_printf (gdb_stdlog, "gdbsim_mourn_inferior:\n"); |
c906108c SS |
1129 | |
1130 | remove_breakpoints (); | |
1131 | generic_mourn_inferior (); | |
1132 | } | |
1133 | ||
c906108c SS |
1134 | /* Pass the command argument through to the simulator verbatim. The |
1135 | simulator must do any command interpretation work. */ | |
1136 | ||
d04afd58 | 1137 | static void |
0b39b52e | 1138 | simulator_command (const char *args, int from_tty) |
c906108c | 1139 | { |
db04efe6 KB |
1140 | struct sim_inferior_data *sim_data; |
1141 | ||
1142 | /* We use inferior_data() instead of get_sim_inferior_data() here in | |
1143 | order to avoid attaching a sim_inferior_data struct to an | |
1144 | inferior unnecessarily. The reason we take such care here is due | |
1145 | to the fact that this function, simulator_command(), may be called | |
1146 | even when the sim target is not active. If we were to use | |
1147 | get_sim_inferior_data() here, it is possible that this call would | |
1148 | be made either prior to gdbsim_open() or after gdbsim_close(), | |
1149 | thus allocating memory that would not be garbage collected until | |
1150 | the ultimate destruction of the associated inferior. */ | |
1151 | ||
18101a35 | 1152 | sim_data = sim_inferior_data_key.get (current_inferior ()); |
db04efe6 | 1153 | if (sim_data == NULL || sim_data->gdbsim_desc == NULL) |
c906108c SS |
1154 | { |
1155 | ||
1156 | /* PREVIOUSLY: The user may give a command before the simulator | |
74228e77 RM |
1157 | is opened. [...] (??? assuming of course one wishes to |
1158 | continue to allow commands to be sent to unopened simulators, | |
1159 | which isn't entirely unreasonable). */ | |
c906108c SS |
1160 | |
1161 | /* The simulator is a builtin abstraction of a remote target. | |
74228e77 RM |
1162 | Consistent with that model, access to the simulator, via sim |
1163 | commands, is restricted to the period when the channel to the | |
1164 | simulator is open. */ | |
c906108c | 1165 | |
8a3fe4f8 | 1166 | error (_("Not connected to the simulator target")); |
c906108c SS |
1167 | } |
1168 | ||
db04efe6 | 1169 | sim_do_command (sim_data->gdbsim_desc, args); |
c906108c SS |
1170 | |
1171 | /* Invalidate the register cache, in case the simulator command does | |
0df8b418 | 1172 | something funny. */ |
c5aa993b | 1173 | registers_changed (); |
c906108c SS |
1174 | } |
1175 | ||
386535dd PA |
1176 | static void |
1177 | sim_command_completer (struct cmd_list_element *ignore, | |
1178 | completion_tracker &tracker, | |
1179 | const char *text, const char *word) | |
56a9aa1d MF |
1180 | { |
1181 | struct sim_inferior_data *sim_data; | |
1182 | ||
18101a35 | 1183 | sim_data = sim_inferior_data_key.get (current_inferior ()); |
56a9aa1d | 1184 | if (sim_data == NULL || sim_data->gdbsim_desc == NULL) |
386535dd | 1185 | return; |
56a9aa1d | 1186 | |
386535dd PA |
1187 | /* sim_complete_command returns a NULL-terminated malloc'ed array of |
1188 | malloc'ed strings. */ | |
1189 | struct sim_completions_deleter | |
1190 | { | |
1191 | void operator() (char **ptr) const | |
1192 | { | |
1193 | for (size_t i = 0; ptr[i] != NULL; i++) | |
1194 | xfree (ptr[i]); | |
1195 | xfree (ptr); | |
1196 | } | |
1197 | }; | |
1198 | ||
1199 | std::unique_ptr<char *[], sim_completions_deleter> sim_completions | |
1200 | (sim_complete_command (sim_data->gdbsim_desc, text, word)); | |
1201 | if (sim_completions == NULL) | |
1202 | return; | |
34370865 | 1203 | |
386535dd PA |
1204 | /* Count the elements and add completions from tail to head because |
1205 | below we'll swap elements out of the array in case add_completion | |
1206 | throws and the deleter deletes until it finds a NULL element. */ | |
1207 | size_t count = 0; | |
1208 | while (sim_completions[count] != NULL) | |
1209 | count++; | |
34370865 | 1210 | |
386535dd PA |
1211 | for (size_t i = count; i > 0; i--) |
1212 | { | |
1213 | gdb::unique_xmalloc_ptr<char> match (sim_completions[i - 1]); | |
1214 | sim_completions[i - 1] = NULL; | |
1215 | tracker.add_completion (std::move (match)); | |
1216 | } | |
56a9aa1d MF |
1217 | } |
1218 | ||
9de2bdd7 PA |
1219 | /* Check to see if a thread is still alive. */ |
1220 | ||
57810aa7 | 1221 | bool |
f6ac5f3d | 1222 | gdbsim_target::thread_alive (ptid_t ptid) |
9de2bdd7 | 1223 | { |
db04efe6 | 1224 | struct sim_inferior_data *sim_data |
e0037b4c | 1225 | = get_inferior_data_by_ptid (ptid, SIM_INSTANCE_NOT_NEEDED); |
db04efe6 KB |
1226 | |
1227 | if (sim_data == NULL) | |
57810aa7 | 1228 | return false; |
db04efe6 | 1229 | |
d7e15655 | 1230 | if (ptid == sim_data->remote_sim_ptid) |
9de2bdd7 | 1231 | /* The simulators' task is always alive. */ |
57810aa7 | 1232 | return true; |
9de2bdd7 | 1233 | |
57810aa7 | 1234 | return false; |
9de2bdd7 PA |
1235 | } |
1236 | ||
a068643d | 1237 | /* Convert a thread ID to a string. */ |
9de2bdd7 | 1238 | |
a068643d | 1239 | std::string |
f6ac5f3d | 1240 | gdbsim_target::pid_to_str (ptid_t ptid) |
9de2bdd7 | 1241 | { |
9de2bdd7 PA |
1242 | return normal_pid_to_str (ptid); |
1243 | } | |
1244 | ||
0c012db1 KB |
1245 | /* Simulator memory may be accessed after the program has been loaded. */ |
1246 | ||
57810aa7 | 1247 | bool |
f6ac5f3d | 1248 | gdbsim_target::has_all_memory () |
0c012db1 KB |
1249 | { |
1250 | struct sim_inferior_data *sim_data | |
1251 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
1252 | ||
1253 | if (!sim_data->program_loaded) | |
57810aa7 | 1254 | return false; |
0c012db1 | 1255 | |
57810aa7 | 1256 | return true; |
0c012db1 KB |
1257 | } |
1258 | ||
57810aa7 | 1259 | bool |
f6ac5f3d | 1260 | gdbsim_target::has_memory () |
0c012db1 KB |
1261 | { |
1262 | struct sim_inferior_data *sim_data | |
1263 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NOT_NEEDED); | |
1264 | ||
1265 | if (!sim_data->program_loaded) | |
57810aa7 | 1266 | return false; |
0c012db1 | 1267 | |
57810aa7 | 1268 | return true; |
0c012db1 KB |
1269 | } |
1270 | ||
e904f56d MF |
1271 | /* Get memory map from the simulator. */ |
1272 | ||
1273 | std::vector<mem_region> | |
1274 | gdbsim_target::memory_map () | |
1275 | { | |
1276 | struct sim_inferior_data *sim_data | |
1277 | = get_sim_inferior_data (current_inferior (), SIM_INSTANCE_NEEDED); | |
1278 | std::vector<mem_region> result; | |
1279 | gdb::unique_xmalloc_ptr<char> text (sim_memory_map (sim_data->gdbsim_desc)); | |
1280 | ||
1281 | if (text != nullptr) | |
1282 | result = parse_memory_map (text.get ()); | |
1283 | ||
1284 | return result; | |
1285 | } | |
1286 | ||
6c265988 | 1287 | void _initialize_remote_sim (); |
c906108c | 1288 | void |
6c265988 | 1289 | _initialize_remote_sim () |
c906108c | 1290 | { |
56a9aa1d MF |
1291 | struct cmd_list_element *c; |
1292 | ||
d9f719f1 | 1293 | add_target (gdbsim_target_info, gdbsim_target_open); |
c906108c | 1294 | |
56a9aa1d MF |
1295 | c = add_com ("sim", class_obscure, simulator_command, |
1296 | _("Send a command to the simulator.")); | |
1297 | set_cmd_completer (c, sim_command_completer); | |
c906108c | 1298 | } |