Commit | Line | Data |
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c906108c | 1 | /* Generic remote debugging interface for simulators. |
0a65a603 | 2 | |
6aba47ca | 3 | Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, |
0fb0cc75 | 4 | 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc. |
0a65a603 | 5 | |
c906108c SS |
6 | Contributed by Cygnus Support. |
7 | Steve Chamberlain (sac@cygnus.com). | |
8 | ||
c5aa993b | 9 | This file is part of GDB. |
c906108c | 10 | |
c5aa993b JM |
11 | This program is free software; you can redistribute it and/or modify |
12 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 13 | the Free Software Foundation; either version 3 of the License, or |
c5aa993b | 14 | (at your option) any later version. |
c906108c | 15 | |
c5aa993b JM |
16 | This program is distributed in the hope that it will be useful, |
17 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | GNU General Public License for more details. | |
c906108c | 20 | |
c5aa993b | 21 | You should have received a copy of the GNU General Public License |
a9762ec7 | 22 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c SS |
23 | |
24 | #include "defs.h" | |
25 | #include "inferior.h" | |
c906108c SS |
26 | #include "value.h" |
27 | #include "gdb_string.h" | |
28 | #include <ctype.h> | |
29 | #include <fcntl.h> | |
30 | #include <signal.h> | |
31 | #include <setjmp.h> | |
32 | #include <errno.h> | |
33 | #include "terminal.h" | |
34 | #include "target.h" | |
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 AC |
40 | #include "gdb_assert.h" |
41 | #include "sim-regno.h" | |
a8cf2722 | 42 | #include "arch-utils.h" |
1986bccd | 43 | #include "readline/readline.h" |
9de2bdd7 | 44 | #include "gdbthread.h" |
c906108c SS |
45 | |
46 | /* Prototypes */ | |
47 | ||
a14ed312 | 48 | extern void _initialize_remote_sim (void); |
392a587b | 49 | |
a14ed312 | 50 | static void dump_mem (char *buf, int len); |
c906108c | 51 | |
a14ed312 | 52 | static void init_callbacks (void); |
c906108c | 53 | |
a14ed312 | 54 | static void end_callbacks (void); |
c906108c | 55 | |
a14ed312 | 56 | static int gdb_os_write_stdout (host_callback *, const char *, int); |
c906108c | 57 | |
a14ed312 | 58 | static void gdb_os_flush_stdout (host_callback *); |
c906108c | 59 | |
a14ed312 | 60 | static int gdb_os_write_stderr (host_callback *, const char *, int); |
c906108c | 61 | |
a14ed312 | 62 | static void gdb_os_flush_stderr (host_callback *); |
c906108c | 63 | |
a14ed312 | 64 | static int gdb_os_poll_quit (host_callback *); |
c906108c SS |
65 | |
66 | /* printf_filtered is depreciated */ | |
a14ed312 | 67 | static void gdb_os_printf_filtered (host_callback *, const char *, ...); |
c906108c | 68 | |
a14ed312 | 69 | static void gdb_os_vprintf_filtered (host_callback *, const char *, va_list); |
c906108c | 70 | |
a14ed312 | 71 | static void gdb_os_evprintf_filtered (host_callback *, const char *, va_list); |
c906108c | 72 | |
72ee8797 | 73 | static void gdb_os_error (host_callback *, const char *, ...) ATTR_NORETURN; |
c906108c | 74 | |
56be3814 | 75 | static void gdbsim_fetch_register (struct regcache *regcache, int regno); |
c906108c | 76 | |
56be3814 | 77 | static void gdbsim_store_register (struct regcache *regcache, int regno); |
c906108c | 78 | |
a14ed312 | 79 | static void gdbsim_kill (void); |
c906108c | 80 | |
a14ed312 | 81 | static void gdbsim_load (char *prog, int fromtty); |
c906108c | 82 | |
a14ed312 | 83 | static void gdbsim_open (char *args, int from_tty); |
c906108c | 84 | |
a14ed312 | 85 | static void gdbsim_close (int quitting); |
c906108c | 86 | |
136d6dae | 87 | static void gdbsim_detach (struct target_ops *ops, char *args, int from_tty); |
c906108c | 88 | |
39f77062 | 89 | static void gdbsim_resume (ptid_t ptid, int step, enum target_signal siggnal); |
c906108c | 90 | |
39f77062 | 91 | static ptid_t gdbsim_wait (ptid_t ptid, struct target_waitstatus *status); |
c906108c | 92 | |
316f2060 | 93 | static void gdbsim_prepare_to_store (struct regcache *regcache); |
c906108c | 94 | |
a14ed312 | 95 | static void gdbsim_files_info (struct target_ops *target); |
c906108c | 96 | |
3c8b2eda | 97 | static void gdbsim_mourn_inferior (struct target_ops *target); |
c906108c | 98 | |
f9c72d52 | 99 | static void gdbsim_stop (ptid_t ptid); |
c906108c | 100 | |
a14ed312 | 101 | void simulator_command (char *args, int from_tty); |
c906108c SS |
102 | |
103 | /* Naming convention: | |
104 | ||
105 | sim_* are the interface to the simulator (see remote-sim.h). | |
106 | gdbsim_* are stuff which is internal to gdb. */ | |
107 | ||
108 | /* Forward data declarations */ | |
109 | extern struct target_ops gdbsim_ops; | |
110 | ||
111 | static int program_loaded = 0; | |
112 | ||
113 | /* We must keep track of whether the simulator has been opened or not because | |
114 | GDB can call a target's close routine twice, but sim_close doesn't allow | |
115 | this. We also need to record the result of sim_open so we can pass it | |
116 | back to the other sim_foo routines. */ | |
117 | static SIM_DESC gdbsim_desc = 0; | |
118 | ||
9de2bdd7 PA |
119 | /* This is the ptid we use while we're connected to the simulator. |
120 | Its value is arbitrary, as the simulator target don't have a notion | |
121 | or processes or threads, but we need something non-null to place in | |
122 | inferior_ptid. */ | |
123 | static ptid_t remote_sim_ptid; | |
124 | ||
c906108c | 125 | static void |
fba45db2 | 126 | dump_mem (char *buf, int len) |
c906108c SS |
127 | { |
128 | if (len <= 8) | |
129 | { | |
130 | if (len == 8 || len == 4) | |
131 | { | |
132 | long l[2]; | |
133 | memcpy (l, buf, len); | |
d4f3574e | 134 | printf_filtered ("\t0x%lx", l[0]); |
a6da1910 AC |
135 | if (len == 8) |
136 | printf_filtered (" 0x%lx", l[1]); | |
137 | printf_filtered ("\n"); | |
c906108c SS |
138 | } |
139 | else | |
140 | { | |
141 | int i; | |
142 | printf_filtered ("\t"); | |
143 | for (i = 0; i < len; i++) | |
144 | printf_filtered ("0x%x ", buf[i]); | |
145 | printf_filtered ("\n"); | |
146 | } | |
147 | } | |
148 | } | |
149 | ||
150 | static host_callback gdb_callback; | |
151 | static int callbacks_initialized = 0; | |
152 | ||
153 | /* Initialize gdb_callback. */ | |
154 | ||
155 | static void | |
fba45db2 | 156 | init_callbacks (void) |
c906108c | 157 | { |
c5aa993b | 158 | if (!callbacks_initialized) |
c906108c SS |
159 | { |
160 | gdb_callback = default_callback; | |
161 | gdb_callback.init (&gdb_callback); | |
162 | gdb_callback.write_stdout = gdb_os_write_stdout; | |
163 | gdb_callback.flush_stdout = gdb_os_flush_stdout; | |
164 | gdb_callback.write_stderr = gdb_os_write_stderr; | |
165 | gdb_callback.flush_stderr = gdb_os_flush_stderr; | |
166 | gdb_callback.printf_filtered = gdb_os_printf_filtered; | |
167 | gdb_callback.vprintf_filtered = gdb_os_vprintf_filtered; | |
168 | gdb_callback.evprintf_filtered = gdb_os_evprintf_filtered; | |
169 | gdb_callback.error = gdb_os_error; | |
170 | gdb_callback.poll_quit = gdb_os_poll_quit; | |
171 | gdb_callback.magic = HOST_CALLBACK_MAGIC; | |
172 | callbacks_initialized = 1; | |
173 | } | |
174 | } | |
175 | ||
176 | /* Release callbacks (free resources used by them). */ | |
177 | ||
178 | static void | |
fba45db2 | 179 | end_callbacks (void) |
c906108c SS |
180 | { |
181 | if (callbacks_initialized) | |
182 | { | |
183 | gdb_callback.shutdown (&gdb_callback); | |
184 | callbacks_initialized = 0; | |
185 | } | |
186 | } | |
187 | ||
188 | /* GDB version of os_write_stdout callback. */ | |
189 | ||
c5aa993b | 190 | static int |
fba45db2 | 191 | gdb_os_write_stdout (host_callback *p, const char *buf, int len) |
c906108c SS |
192 | { |
193 | int i; | |
194 | char b[2]; | |
195 | ||
d9fcf2fb | 196 | ui_file_write (gdb_stdtarg, buf, len); |
c906108c SS |
197 | return len; |
198 | } | |
199 | ||
200 | /* GDB version of os_flush_stdout callback. */ | |
201 | ||
202 | static void | |
fba45db2 | 203 | gdb_os_flush_stdout (host_callback *p) |
c906108c | 204 | { |
4ce44c66 | 205 | gdb_flush (gdb_stdtarg); |
c906108c SS |
206 | } |
207 | ||
208 | /* GDB version of os_write_stderr callback. */ | |
209 | ||
c5aa993b | 210 | static int |
fba45db2 | 211 | gdb_os_write_stderr (host_callback *p, const char *buf, int len) |
c906108c SS |
212 | { |
213 | int i; | |
214 | char b[2]; | |
215 | ||
c5aa993b | 216 | for (i = 0; i < len; i++) |
c906108c SS |
217 | { |
218 | b[0] = buf[i]; | |
219 | b[1] = 0; | |
22e8e3c7 | 220 | fputs_unfiltered (b, gdb_stdtargerr); |
c906108c SS |
221 | } |
222 | return len; | |
223 | } | |
224 | ||
225 | /* GDB version of os_flush_stderr callback. */ | |
226 | ||
227 | static void | |
fba45db2 | 228 | gdb_os_flush_stderr (host_callback *p) |
c906108c | 229 | { |
22e8e3c7 | 230 | gdb_flush (gdb_stdtargerr); |
c906108c SS |
231 | } |
232 | ||
233 | /* GDB version of printf_filtered callback. */ | |
234 | ||
c906108c | 235 | static void |
c5aa993b | 236 | gdb_os_printf_filtered (host_callback * p, const char *format,...) |
c906108c SS |
237 | { |
238 | va_list args; | |
c906108c | 239 | va_start (args, format); |
c906108c SS |
240 | |
241 | vfprintf_filtered (gdb_stdout, format, args); | |
242 | ||
243 | va_end (args); | |
244 | } | |
245 | ||
246 | /* GDB version of error vprintf_filtered. */ | |
247 | ||
c906108c | 248 | static void |
c5aa993b | 249 | gdb_os_vprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c SS |
250 | { |
251 | vfprintf_filtered (gdb_stdout, format, ap); | |
252 | } | |
253 | ||
254 | /* GDB version of error evprintf_filtered. */ | |
255 | ||
c906108c | 256 | static void |
c5aa993b | 257 | gdb_os_evprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c SS |
258 | { |
259 | vfprintf_filtered (gdb_stderr, format, ap); | |
260 | } | |
261 | ||
262 | /* GDB version of error callback. */ | |
263 | ||
c906108c | 264 | static void |
c5aa993b | 265 | gdb_os_error (host_callback * p, const char *format,...) |
c906108c | 266 | { |
9a4105ab AC |
267 | if (deprecated_error_hook) |
268 | (*deprecated_error_hook) (); | |
c5aa993b | 269 | else |
c906108c SS |
270 | { |
271 | va_list args; | |
c906108c | 272 | va_start (args, format); |
4ce44c66 | 273 | verror (format, args); |
c906108c | 274 | va_end (args); |
c906108c | 275 | } |
72ee8797 | 276 | exit (1); |
c906108c SS |
277 | } |
278 | ||
8238d0bf | 279 | int |
e7faf938 | 280 | one2one_register_sim_regno (struct gdbarch *gdbarch, int regnum) |
8238d0bf AC |
281 | { |
282 | /* Only makes sense to supply raw registers. */ | |
e7faf938 | 283 | gdb_assert (regnum >= 0 && regnum < gdbarch_num_regs (gdbarch)); |
8238d0bf AC |
284 | return regnum; |
285 | } | |
286 | ||
c906108c | 287 | static void |
56be3814 | 288 | gdbsim_fetch_register (struct regcache *regcache, int regno) |
c906108c | 289 | { |
40a6adc1 | 290 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
c5aa993b | 291 | if (regno == -1) |
c906108c | 292 | { |
40a6adc1 | 293 | for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++) |
56be3814 | 294 | gdbsim_fetch_register (regcache, regno); |
8238d0bf | 295 | return; |
c906108c | 296 | } |
8238d0bf | 297 | |
40a6adc1 | 298 | switch (gdbarch_register_sim_regno (gdbarch, regno)) |
c906108c | 299 | { |
8238d0bf AC |
300 | case LEGACY_SIM_REGNO_IGNORE: |
301 | break; | |
302 | case SIM_REGNO_DOES_NOT_EXIST: | |
303 | { | |
304 | /* For moment treat a `does not exist' register the same way | |
305 | as an ``unavailable'' register. */ | |
d9d9c31f | 306 | char buf[MAX_REGISTER_SIZE]; |
8238d0bf | 307 | int nr_bytes; |
d9d9c31f | 308 | memset (buf, 0, MAX_REGISTER_SIZE); |
56be3814 | 309 | regcache_raw_supply (regcache, regno, buf); |
8238d0bf AC |
310 | break; |
311 | } | |
56be3814 | 312 | |
8238d0bf AC |
313 | default: |
314 | { | |
315 | static int warn_user = 1; | |
d9d9c31f | 316 | char buf[MAX_REGISTER_SIZE]; |
8238d0bf | 317 | int nr_bytes; |
40a6adc1 | 318 | gdb_assert (regno >= 0 && regno < gdbarch_num_regs (gdbarch)); |
d9d9c31f | 319 | memset (buf, 0, MAX_REGISTER_SIZE); |
d4f3574e | 320 | nr_bytes = sim_fetch_register (gdbsim_desc, |
474c1661 | 321 | gdbarch_register_sim_regno |
40a6adc1 | 322 | (gdbarch, regno), |
474c1661 | 323 | buf, |
40a6adc1 MD |
324 | register_size (gdbarch, regno)); |
325 | if (nr_bytes > 0 | |
326 | && nr_bytes != register_size (gdbarch, regno) && warn_user) | |
8238d0bf AC |
327 | { |
328 | fprintf_unfiltered (gdb_stderr, | |
329 | "Size of register %s (%d/%d) incorrect (%d instead of %d))", | |
40a6adc1 | 330 | gdbarch_register_name (gdbarch, regno), |
474c1661 UW |
331 | regno, |
332 | gdbarch_register_sim_regno | |
40a6adc1 MD |
333 | (gdbarch, regno), |
334 | nr_bytes, register_size (gdbarch, regno)); | |
8238d0bf AC |
335 | warn_user = 0; |
336 | } | |
337 | /* FIXME: cagney/2002-05-27: Should check `nr_bytes == 0' | |
278a7cf7 | 338 | indicating that GDB and the SIM have different ideas about |
8238d0bf AC |
339 | which registers are fetchable. */ |
340 | /* Else if (nr_bytes < 0): an old simulator, that doesn't | |
341 | think to return the register size. Just assume all is ok. */ | |
56be3814 | 342 | regcache_raw_supply (regcache, regno, buf); |
ea35711c | 343 | if (remote_debug) |
8238d0bf AC |
344 | { |
345 | printf_filtered ("gdbsim_fetch_register: %d", regno); | |
346 | /* FIXME: We could print something more intelligible. */ | |
40a6adc1 | 347 | dump_mem (buf, register_size (gdbarch, regno)); |
8238d0bf AC |
348 | } |
349 | break; | |
350 | } | |
c906108c SS |
351 | } |
352 | } | |
353 | ||
354 | ||
355 | static void | |
56be3814 | 356 | gdbsim_store_register (struct regcache *regcache, int regno) |
c906108c | 357 | { |
40a6adc1 | 358 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
c5aa993b | 359 | if (regno == -1) |
c906108c | 360 | { |
40a6adc1 | 361 | for (regno = 0; regno < gdbarch_num_regs (gdbarch); regno++) |
56be3814 | 362 | gdbsim_store_register (regcache, regno); |
8238d0bf | 363 | return; |
c906108c | 364 | } |
40a6adc1 | 365 | else if (gdbarch_register_sim_regno (gdbarch, regno) >= 0) |
c906108c | 366 | { |
123a958e | 367 | char tmp[MAX_REGISTER_SIZE]; |
c906108c | 368 | int nr_bytes; |
56be3814 | 369 | regcache_cooked_read (regcache, regno, tmp); |
d4f3574e | 370 | nr_bytes = sim_store_register (gdbsim_desc, |
474c1661 | 371 | gdbarch_register_sim_regno |
40a6adc1 MD |
372 | (gdbarch, regno), |
373 | tmp, register_size (gdbarch, regno)); | |
374 | if (nr_bytes > 0 && nr_bytes != register_size (gdbarch, regno)) | |
8e65ff28 | 375 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 376 | _("Register size different to expected")); |
8238d0bf | 377 | /* FIXME: cagney/2002-05-27: Should check `nr_bytes == 0' |
278a7cf7 | 378 | indicating that GDB and the SIM have different ideas about |
8238d0bf | 379 | which registers are fetchable. */ |
ea35711c | 380 | if (remote_debug) |
c906108c SS |
381 | { |
382 | printf_filtered ("gdbsim_store_register: %d", regno); | |
383 | /* FIXME: We could print something more intelligible. */ | |
40a6adc1 | 384 | dump_mem (tmp, register_size (gdbarch, regno)); |
c906108c SS |
385 | } |
386 | } | |
387 | } | |
388 | ||
389 | /* Kill the running program. This may involve closing any open files | |
390 | and releasing other resources acquired by the simulated program. */ | |
391 | ||
392 | static void | |
fba45db2 | 393 | gdbsim_kill (void) |
c906108c | 394 | { |
ea35711c | 395 | if (remote_debug) |
c906108c SS |
396 | printf_filtered ("gdbsim_kill\n"); |
397 | ||
398 | /* There is no need to `kill' running simulator - the simulator is | |
52bb452f DJ |
399 | not running. Mourning it is enough. */ |
400 | target_mourn_inferior (); | |
c906108c SS |
401 | } |
402 | ||
403 | /* Load an executable file into the target process. This is expected to | |
404 | not only bring new code into the target process, but also to update | |
405 | GDB's symbol tables to match. */ | |
406 | ||
407 | static void | |
1986bccd | 408 | gdbsim_load (char *args, int fromtty) |
c906108c | 409 | { |
d1a41061 | 410 | char **argv; |
1986bccd AS |
411 | char *prog; |
412 | ||
d1a41061 PP |
413 | if (args == NULL) |
414 | error_no_arg (_("program to load")); | |
1986bccd | 415 | |
d1a41061 | 416 | argv = gdb_buildargv (args); |
1986bccd AS |
417 | make_cleanup_freeargv (argv); |
418 | ||
419 | prog = tilde_expand (argv[0]); | |
420 | ||
421 | if (argv[1] != NULL) | |
422 | error (_("GDB sim does not yet support a load offset.")); | |
423 | ||
ea35711c | 424 | if (remote_debug) |
c906108c SS |
425 | printf_filtered ("gdbsim_load: prog \"%s\"\n", prog); |
426 | ||
c906108c SS |
427 | /* FIXME: We will print two messages on error. |
428 | Need error to either not print anything if passed NULL or need | |
429 | another routine that doesn't take any arguments. */ | |
430 | if (sim_load (gdbsim_desc, prog, NULL, fromtty) == SIM_RC_FAIL) | |
8a3fe4f8 | 431 | error (_("unable to load program")); |
c906108c SS |
432 | |
433 | /* FIXME: If a load command should reset the targets registers then | |
434 | a call to sim_create_inferior() should go here. */ | |
435 | ||
436 | program_loaded = 1; | |
437 | } | |
438 | ||
439 | ||
39f77062 | 440 | /* Start an inferior process and set inferior_ptid to its pid. |
c906108c SS |
441 | EXEC_FILE is the file to run. |
442 | ARGS is a string containing the arguments to the program. | |
443 | ENV is the environment vector to pass. Errors reported with error(). | |
444 | On VxWorks and various standalone systems, we ignore exec_file. */ | |
445 | /* This is called not only when we first attach, but also when the | |
446 | user types "run" after having attached. */ | |
447 | ||
448 | static void | |
3c8b2eda TJB |
449 | gdbsim_create_inferior (struct target_ops *target, char *exec_file, char *args, |
450 | char **env, int from_tty) | |
c906108c SS |
451 | { |
452 | int len; | |
c5aa993b | 453 | char *arg_buf, **argv; |
c906108c SS |
454 | |
455 | if (exec_file == 0 || exec_bfd == 0) | |
8a3fe4f8 | 456 | warning (_("No executable file specified.")); |
c5aa993b | 457 | if (!program_loaded) |
8a3fe4f8 | 458 | warning (_("No program loaded.")); |
c906108c | 459 | |
ea35711c | 460 | if (remote_debug) |
c906108c | 461 | printf_filtered ("gdbsim_create_inferior: exec_file \"%s\", args \"%s\"\n", |
c5aa993b | 462 | (exec_file ? exec_file : "(NULL)"), |
c906108c SS |
463 | args); |
464 | ||
9de2bdd7 PA |
465 | if (ptid_equal (inferior_ptid, remote_sim_ptid)) |
466 | gdbsim_kill (); | |
c906108c SS |
467 | remove_breakpoints (); |
468 | init_wait_for_inferior (); | |
469 | ||
470 | if (exec_file != NULL) | |
471 | { | |
c5aa993b | 472 | len = strlen (exec_file) + 1 + strlen (args) + 1 + /*slop */ 10; |
c906108c SS |
473 | arg_buf = (char *) alloca (len); |
474 | arg_buf[0] = '\0'; | |
475 | strcat (arg_buf, exec_file); | |
476 | strcat (arg_buf, " "); | |
477 | strcat (arg_buf, args); | |
d1a41061 | 478 | argv = gdb_buildargv (arg_buf); |
7a292a7a | 479 | make_cleanup_freeargv (argv); |
c906108c SS |
480 | } |
481 | else | |
482 | argv = NULL; | |
483 | sim_create_inferior (gdbsim_desc, exec_bfd, argv, env); | |
484 | ||
9de2bdd7 | 485 | inferior_ptid = remote_sim_ptid; |
6fbd21a1 | 486 | add_inferior_silent (ptid_get_pid (inferior_ptid)); |
9de2bdd7 PA |
487 | add_thread_silent (inferior_ptid); |
488 | ||
52bb452f | 489 | target_mark_running (&gdbsim_ops); |
c5aa993b | 490 | insert_breakpoints (); /* Needed to get correct instruction in cache */ |
c906108c SS |
491 | |
492 | clear_proceed_status (); | |
c906108c SS |
493 | } |
494 | ||
495 | /* The open routine takes the rest of the parameters from the command, | |
496 | and (if successful) pushes a new target onto the stack. | |
497 | Targets should supply this routine, if only to provide an error message. */ | |
498 | /* Called when selecting the simulator. EG: (gdb) target sim name. */ | |
499 | ||
500 | static void | |
fba45db2 | 501 | gdbsim_open (char *args, int from_tty) |
c906108c SS |
502 | { |
503 | int len; | |
504 | char *arg_buf; | |
505 | char **argv; | |
506 | ||
ea35711c | 507 | if (remote_debug) |
c906108c SS |
508 | printf_filtered ("gdbsim_open: args \"%s\"\n", args ? args : "(null)"); |
509 | ||
510 | /* Remove current simulator if one exists. Only do this if the simulator | |
511 | has been opened because sim_close requires it. | |
512 | This is important because the call to push_target below will cause | |
513 | sim_close to be called if the simulator is already open, but push_target | |
514 | is called after sim_open! We can't move the call to push_target before | |
515 | the call to sim_open because sim_open may invoke `error'. */ | |
516 | if (gdbsim_desc != NULL) | |
517 | unpush_target (&gdbsim_ops); | |
518 | ||
c5aa993b | 519 | len = (7 + 1 /* gdbsim */ |
c906108c SS |
520 | + strlen (" -E little") |
521 | + strlen (" --architecture=xxxxxxxxxx") | |
522 | + (args ? strlen (args) : 0) | |
c5aa993b | 523 | + 50) /* slack */ ; |
c906108c | 524 | arg_buf = (char *) alloca (len); |
c5aa993b | 525 | strcpy (arg_buf, "gdbsim"); /* 7 */ |
b6d373df DJ |
526 | /* Specify the byte order for the target when it is explicitly |
527 | specified by the user (not auto detected). */ | |
528 | switch (selected_byte_order ()) | |
c906108c | 529 | { |
a8cf2722 AC |
530 | case BFD_ENDIAN_BIG: |
531 | strcat (arg_buf, " -E big"); | |
532 | break; | |
533 | case BFD_ENDIAN_LITTLE: | |
534 | strcat (arg_buf, " -E little"); | |
535 | break; | |
536 | case BFD_ENDIAN_UNKNOWN: | |
537 | break; | |
c906108c SS |
538 | } |
539 | /* Specify the architecture of the target when it has been | |
540 | explicitly specified */ | |
a8cf2722 | 541 | if (selected_architecture_name () != NULL) |
c906108c SS |
542 | { |
543 | strcat (arg_buf, " --architecture="); | |
a8cf2722 | 544 | strcat (arg_buf, selected_architecture_name ()); |
c906108c SS |
545 | } |
546 | /* finally, any explicit args */ | |
547 | if (args) | |
548 | { | |
c5aa993b | 549 | strcat (arg_buf, " "); /* 1 */ |
c906108c SS |
550 | strcat (arg_buf, args); |
551 | } | |
d1a41061 | 552 | argv = gdb_buildargv (arg_buf); |
7a292a7a | 553 | make_cleanup_freeargv (argv); |
c906108c SS |
554 | |
555 | init_callbacks (); | |
556 | gdbsim_desc = sim_open (SIM_OPEN_DEBUG, &gdb_callback, exec_bfd, argv); | |
557 | ||
558 | if (gdbsim_desc == 0) | |
8a3fe4f8 | 559 | error (_("unable to create simulator instance")); |
c906108c SS |
560 | |
561 | push_target (&gdbsim_ops); | |
c906108c | 562 | printf_filtered ("Connected to the simulator.\n"); |
52bb452f DJ |
563 | |
564 | /* There's nothing running after "target sim" or "load"; not until | |
565 | "run". */ | |
566 | inferior_ptid = null_ptid; | |
567 | target_mark_exited (&gdbsim_ops); | |
c906108c SS |
568 | } |
569 | ||
570 | /* Does whatever cleanup is required for a target that we are no longer | |
571 | going to be calling. Argument says whether we are quitting gdb and | |
572 | should not get hung in case of errors, or whether we want a clean | |
573 | termination even if it takes a while. This routine is automatically | |
574 | always called just before a routine is popped off the target stack. | |
575 | Closing file descriptors and freeing memory are typical things it should | |
576 | do. */ | |
577 | /* Close out all files and local state before this target loses control. */ | |
578 | ||
579 | static void | |
fba45db2 | 580 | gdbsim_close (int quitting) |
c906108c | 581 | { |
ea35711c | 582 | if (remote_debug) |
c906108c SS |
583 | printf_filtered ("gdbsim_close: quitting %d\n", quitting); |
584 | ||
585 | program_loaded = 0; | |
586 | ||
587 | if (gdbsim_desc != NULL) | |
588 | { | |
589 | sim_close (gdbsim_desc, quitting); | |
590 | gdbsim_desc = NULL; | |
591 | } | |
592 | ||
593 | end_callbacks (); | |
75660bc0 | 594 | generic_mourn_inferior (); |
9de2bdd7 | 595 | delete_thread_silent (remote_sim_ptid); |
7f9f62ba | 596 | delete_inferior_silent (ptid_get_pid (remote_sim_ptid)); |
c906108c SS |
597 | } |
598 | ||
599 | /* Takes a program previously attached to and detaches it. | |
600 | The program may resume execution (some targets do, some don't) and will | |
601 | no longer stop on signals, etc. We better not have left any breakpoints | |
602 | in the program or it'll die when it hits one. ARGS is arguments | |
603 | typed by the user (e.g. a signal to send the process). FROM_TTY | |
604 | says whether to be verbose or not. */ | |
605 | /* Terminate the open connection to the remote debugger. | |
606 | Use this when you want to detach and do something else with your gdb. */ | |
607 | ||
608 | static void | |
136d6dae | 609 | gdbsim_detach (struct target_ops *ops, char *args, int from_tty) |
c906108c | 610 | { |
ea35711c | 611 | if (remote_debug) |
c906108c SS |
612 | printf_filtered ("gdbsim_detach: args \"%s\"\n", args); |
613 | ||
614 | pop_target (); /* calls gdbsim_close to do the real work */ | |
615 | if (from_tty) | |
616 | printf_filtered ("Ending simulator %s debugging\n", target_shortname); | |
617 | } | |
c5aa993b | 618 | |
c906108c SS |
619 | /* Resume execution of the target process. STEP says whether to single-step |
620 | or to run free; SIGGNAL is the signal value (e.g. SIGINT) to be given | |
621 | to the target, or zero for no signal. */ | |
622 | ||
623 | static enum target_signal resume_siggnal; | |
624 | static int resume_step; | |
625 | ||
626 | static void | |
39f77062 | 627 | gdbsim_resume (ptid_t ptid, int step, enum target_signal siggnal) |
c906108c | 628 | { |
9de2bdd7 | 629 | if (!ptid_equal (inferior_ptid, remote_sim_ptid)) |
8a3fe4f8 | 630 | error (_("The program is not being run.")); |
c906108c | 631 | |
ea35711c | 632 | if (remote_debug) |
c906108c SS |
633 | printf_filtered ("gdbsim_resume: step %d, signal %d\n", step, siggnal); |
634 | ||
635 | resume_siggnal = siggnal; | |
636 | resume_step = step; | |
637 | } | |
638 | ||
639 | /* Notify the simulator of an asynchronous request to stop. | |
c5aa993b | 640 | |
c906108c SS |
641 | The simulator shall ensure that the stop request is eventually |
642 | delivered to the simulator. If the call is made while the | |
643 | simulator is not running then the stop request is processed when | |
644 | the simulator is next resumed. | |
645 | ||
646 | For simulators that do not support this operation, just abort */ | |
647 | ||
648 | static void | |
f9c72d52 | 649 | gdbsim_stop (ptid_t ptid) |
c906108c | 650 | { |
c5aa993b | 651 | if (!sim_stop (gdbsim_desc)) |
c906108c SS |
652 | { |
653 | quit (); | |
654 | } | |
655 | } | |
656 | ||
657 | /* GDB version of os_poll_quit callback. | |
8a0ce09a | 658 | Taken from gdb/util.c - should be in a library. */ |
c906108c SS |
659 | |
660 | static int | |
fba45db2 | 661 | gdb_os_poll_quit (host_callback *p) |
c906108c | 662 | { |
98bbd631 AC |
663 | if (deprecated_ui_loop_hook != NULL) |
664 | deprecated_ui_loop_hook (0); | |
7a292a7a | 665 | |
c5aa993b | 666 | if (quit_flag) /* gdb's idea of quit */ |
c906108c | 667 | { |
c5aa993b | 668 | quit_flag = 0; /* we've stolen it */ |
c906108c SS |
669 | return 1; |
670 | } | |
671 | else if (immediate_quit) | |
672 | { | |
673 | return 1; | |
674 | } | |
675 | return 0; | |
676 | } | |
677 | ||
678 | /* Wait for inferior process to do something. Return pid of child, | |
679 | or -1 in case of error; store status through argument pointer STATUS, | |
680 | just as `wait' would. */ | |
681 | ||
682 | static void | |
fba45db2 | 683 | gdbsim_cntrl_c (int signo) |
c906108c | 684 | { |
0aef6ba2 | 685 | gdbsim_stop (remote_sim_ptid); |
c906108c SS |
686 | } |
687 | ||
39f77062 KB |
688 | static ptid_t |
689 | gdbsim_wait (ptid_t ptid, struct target_waitstatus *status) | |
c906108c SS |
690 | { |
691 | static RETSIGTYPE (*prev_sigint) (); | |
692 | int sigrc = 0; | |
693 | enum sim_stop reason = sim_running; | |
694 | ||
ea35711c | 695 | if (remote_debug) |
c906108c SS |
696 | printf_filtered ("gdbsim_wait\n"); |
697 | ||
698 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) | |
699 | { | |
700 | struct sigaction sa, osa; | |
701 | sa.sa_handler = gdbsim_cntrl_c; | |
702 | sigemptyset (&sa.sa_mask); | |
703 | sa.sa_flags = 0; | |
704 | sigaction (SIGINT, &sa, &osa); | |
705 | prev_sigint = osa.sa_handler; | |
706 | } | |
707 | #else | |
708 | prev_sigint = signal (SIGINT, gdbsim_cntrl_c); | |
709 | #endif | |
aba6488e | 710 | sim_resume (gdbsim_desc, resume_step, resume_siggnal); |
c906108c SS |
711 | signal (SIGINT, prev_sigint); |
712 | resume_step = 0; | |
713 | ||
714 | sim_stop_reason (gdbsim_desc, &reason, &sigrc); | |
715 | ||
716 | switch (reason) | |
717 | { | |
718 | case sim_exited: | |
719 | status->kind = TARGET_WAITKIND_EXITED; | |
720 | status->value.integer = sigrc; | |
721 | break; | |
722 | case sim_stopped: | |
723 | switch (sigrc) | |
724 | { | |
aba6488e | 725 | case TARGET_SIGNAL_ABRT: |
c906108c SS |
726 | quit (); |
727 | break; | |
aba6488e MM |
728 | case TARGET_SIGNAL_INT: |
729 | case TARGET_SIGNAL_TRAP: | |
c906108c SS |
730 | default: |
731 | status->kind = TARGET_WAITKIND_STOPPED; | |
aba6488e | 732 | status->value.sig = sigrc; |
c906108c SS |
733 | break; |
734 | } | |
735 | break; | |
736 | case sim_signalled: | |
737 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
aba6488e | 738 | status->value.sig = sigrc; |
c906108c SS |
739 | break; |
740 | case sim_running: | |
741 | case sim_polling: | |
742 | /* FIXME: Is this correct? */ | |
743 | break; | |
744 | } | |
745 | ||
39f77062 | 746 | return inferior_ptid; |
c906108c SS |
747 | } |
748 | ||
749 | /* Get ready to modify the registers array. On machines which store | |
750 | individual registers, this doesn't need to do anything. On machines | |
751 | which store all the registers in one fell swoop, this makes sure | |
752 | that registers contains all the registers from the program being | |
753 | debugged. */ | |
754 | ||
755 | static void | |
316f2060 | 756 | gdbsim_prepare_to_store (struct regcache *regcache) |
c906108c SS |
757 | { |
758 | /* Do nothing, since we can store individual regs */ | |
759 | } | |
760 | ||
d93bce06 KB |
761 | /* Transfer LEN bytes between GDB address MYADDR and target address |
762 | MEMADDR. If WRITE is non-zero, transfer them to the target, | |
763 | otherwise transfer them from the target. TARGET is unused. | |
764 | ||
765 | Returns the number of bytes transferred. */ | |
766 | ||
c906108c | 767 | static int |
8d7337bf | 768 | gdbsim_xfer_inferior_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, |
0a65a603 AC |
769 | int write, struct mem_attrib *attrib, |
770 | struct target_ops *target) | |
c906108c | 771 | { |
52bb452f DJ |
772 | /* If no program is running yet, then ignore the simulator for |
773 | memory. Pass the request down to the next target, hopefully | |
774 | an exec file. */ | |
775 | if (!target_has_execution) | |
776 | return 0; | |
777 | ||
c5aa993b | 778 | if (!program_loaded) |
8a3fe4f8 | 779 | error (_("No program loaded.")); |
c906108c | 780 | |
ea35711c | 781 | if (remote_debug) |
c906108c | 782 | { |
d4f3574e SS |
783 | /* FIXME: Send to something other than STDOUT? */ |
784 | printf_filtered ("gdbsim_xfer_inferior_memory: myaddr 0x"); | |
785 | gdb_print_host_address (myaddr, gdb_stdout); | |
786 | printf_filtered (", memaddr 0x%s, len %d, write %d\n", | |
787 | paddr_nz (memaddr), len, write); | |
ea35711c | 788 | if (remote_debug && write) |
c5aa993b | 789 | dump_mem (myaddr, len); |
c906108c SS |
790 | } |
791 | ||
792 | if (write) | |
793 | { | |
794 | len = sim_write (gdbsim_desc, memaddr, myaddr, len); | |
795 | } | |
c5aa993b | 796 | else |
c906108c SS |
797 | { |
798 | len = sim_read (gdbsim_desc, memaddr, myaddr, len); | |
ea35711c | 799 | if (remote_debug && len > 0) |
c5aa993b JM |
800 | dump_mem (myaddr, len); |
801 | } | |
c906108c SS |
802 | return len; |
803 | } | |
804 | ||
805 | static void | |
fba45db2 | 806 | gdbsim_files_info (struct target_ops *target) |
c906108c SS |
807 | { |
808 | char *file = "nothing"; | |
809 | ||
810 | if (exec_bfd) | |
811 | file = bfd_get_filename (exec_bfd); | |
812 | ||
ea35711c | 813 | if (remote_debug) |
c906108c SS |
814 | printf_filtered ("gdbsim_files_info: file \"%s\"\n", file); |
815 | ||
816 | if (exec_bfd) | |
817 | { | |
818 | printf_filtered ("\tAttached to %s running program %s\n", | |
819 | target_shortname, file); | |
820 | sim_info (gdbsim_desc, 0); | |
821 | } | |
822 | } | |
823 | ||
824 | /* Clear the simulator's notion of what the break points are. */ | |
825 | ||
826 | static void | |
3c8b2eda | 827 | gdbsim_mourn_inferior (struct target_ops *target) |
c5aa993b | 828 | { |
ea35711c | 829 | if (remote_debug) |
c906108c SS |
830 | printf_filtered ("gdbsim_mourn_inferior:\n"); |
831 | ||
832 | remove_breakpoints (); | |
84290f2f | 833 | target_mark_exited (target); |
c906108c | 834 | generic_mourn_inferior (); |
9de2bdd7 | 835 | delete_thread_silent (remote_sim_ptid); |
c906108c SS |
836 | } |
837 | ||
c906108c SS |
838 | /* Pass the command argument through to the simulator verbatim. The |
839 | simulator must do any command interpretation work. */ | |
840 | ||
841 | void | |
fba45db2 | 842 | simulator_command (char *args, int from_tty) |
c906108c SS |
843 | { |
844 | if (gdbsim_desc == NULL) | |
845 | { | |
846 | ||
847 | /* PREVIOUSLY: The user may give a command before the simulator | |
848 | is opened. [...] (??? assuming of course one wishes to | |
849 | continue to allow commands to be sent to unopened simulators, | |
850 | which isn't entirely unreasonable). */ | |
851 | ||
852 | /* The simulator is a builtin abstraction of a remote target. | |
853 | Consistent with that model, access to the simulator, via sim | |
854 | commands, is restricted to the period when the channel to the | |
855 | simulator is open. */ | |
856 | ||
8a3fe4f8 | 857 | error (_("Not connected to the simulator target")); |
c906108c SS |
858 | } |
859 | ||
860 | sim_do_command (gdbsim_desc, args); | |
861 | ||
862 | /* Invalidate the register cache, in case the simulator command does | |
863 | something funny. */ | |
c5aa993b | 864 | registers_changed (); |
c906108c SS |
865 | } |
866 | ||
9de2bdd7 PA |
867 | /* Check to see if a thread is still alive. */ |
868 | ||
869 | static int | |
870 | gdbsim_thread_alive (ptid_t ptid) | |
871 | { | |
872 | if (ptid_equal (ptid, remote_sim_ptid)) | |
873 | /* The simulators' task is always alive. */ | |
874 | return 1; | |
875 | ||
876 | return 0; | |
877 | } | |
878 | ||
879 | /* Convert a thread ID to a string. Returns the string in a static | |
880 | buffer. */ | |
881 | ||
882 | static char * | |
883 | gdbsim_pid_to_str (ptid_t ptid) | |
884 | { | |
885 | static char buf[64]; | |
886 | ||
887 | if (ptid_equal (remote_sim_ptid, ptid)) | |
888 | { | |
889 | xsnprintf (buf, sizeof buf, "Thread <main>"); | |
890 | return buf; | |
891 | } | |
892 | ||
893 | return normal_pid_to_str (ptid); | |
894 | } | |
895 | ||
c906108c SS |
896 | /* Define the target subroutine names */ |
897 | ||
c5aa993b JM |
898 | struct target_ops gdbsim_ops; |
899 | ||
900 | static void | |
901 | init_gdbsim_ops (void) | |
902 | { | |
903 | gdbsim_ops.to_shortname = "sim"; | |
904 | gdbsim_ops.to_longname = "simulator"; | |
905 | gdbsim_ops.to_doc = "Use the compiled-in simulator."; | |
906 | gdbsim_ops.to_open = gdbsim_open; | |
907 | gdbsim_ops.to_close = gdbsim_close; | |
c5aa993b | 908 | gdbsim_ops.to_detach = gdbsim_detach; |
c5aa993b JM |
909 | gdbsim_ops.to_resume = gdbsim_resume; |
910 | gdbsim_ops.to_wait = gdbsim_wait; | |
c5aa993b JM |
911 | gdbsim_ops.to_fetch_registers = gdbsim_fetch_register; |
912 | gdbsim_ops.to_store_registers = gdbsim_store_register; | |
913 | gdbsim_ops.to_prepare_to_store = gdbsim_prepare_to_store; | |
c8e73a31 | 914 | gdbsim_ops.deprecated_xfer_memory = gdbsim_xfer_inferior_memory; |
c5aa993b | 915 | gdbsim_ops.to_files_info = gdbsim_files_info; |
8181d85f DJ |
916 | gdbsim_ops.to_insert_breakpoint = memory_insert_breakpoint; |
917 | gdbsim_ops.to_remove_breakpoint = memory_remove_breakpoint; | |
c5aa993b JM |
918 | gdbsim_ops.to_kill = gdbsim_kill; |
919 | gdbsim_ops.to_load = gdbsim_load; | |
c5aa993b | 920 | gdbsim_ops.to_create_inferior = gdbsim_create_inferior; |
c5aa993b | 921 | gdbsim_ops.to_mourn_inferior = gdbsim_mourn_inferior; |
c5aa993b | 922 | gdbsim_ops.to_stop = gdbsim_stop; |
9de2bdd7 PA |
923 | gdbsim_ops.to_thread_alive = gdbsim_thread_alive; |
924 | gdbsim_ops.to_pid_to_str = gdbsim_pid_to_str; | |
c5aa993b | 925 | gdbsim_ops.to_stratum = process_stratum; |
c5aa993b JM |
926 | gdbsim_ops.to_has_all_memory = 1; |
927 | gdbsim_ops.to_has_memory = 1; | |
928 | gdbsim_ops.to_has_stack = 1; | |
929 | gdbsim_ops.to_has_registers = 1; | |
930 | gdbsim_ops.to_has_execution = 1; | |
c5aa993b | 931 | gdbsim_ops.to_magic = OPS_MAGIC; |
c906108c SS |
932 | } |
933 | ||
934 | void | |
fba45db2 | 935 | _initialize_remote_sim (void) |
c906108c | 936 | { |
c5aa993b | 937 | init_gdbsim_ops (); |
c906108c SS |
938 | add_target (&gdbsim_ops); |
939 | ||
24ec834b | 940 | add_com ("sim", class_obscure, simulator_command, |
1bedd215 | 941 | _("Send a command to the simulator.")); |
9de2bdd7 PA |
942 | |
943 | /* Yes, 42000 is arbitrary. The only sense out of it, is that it | |
944 | isn't 0. */ | |
945 | remote_sim_ptid = ptid_build (42000, 0, 42000); | |
c906108c | 946 | } |