Commit | Line | Data |
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c906108c | 1 | /* Generic remote debugging interface for simulators. |
0a65a603 | 2 | |
6aba47ca DJ |
3 | Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, |
4 | 2004, 2005, 2006, 2007 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" |
c906108c SS |
44 | |
45 | /* Prototypes */ | |
46 | ||
a14ed312 | 47 | extern void _initialize_remote_sim (void); |
392a587b | 48 | |
a14ed312 | 49 | static void dump_mem (char *buf, int len); |
c906108c | 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 SS |
64 | |
65 | /* printf_filtered 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 | |
a14ed312 | 72 | static void gdb_os_error (host_callback *, const char *, ...); |
c906108c | 73 | |
56be3814 | 74 | static void gdbsim_fetch_register (struct regcache *regcache, int regno); |
c906108c | 75 | |
56be3814 | 76 | static void gdbsim_store_register (struct regcache *regcache, int regno); |
c906108c | 77 | |
a14ed312 | 78 | static void gdbsim_kill (void); |
c906108c | 79 | |
a14ed312 | 80 | static void gdbsim_load (char *prog, int fromtty); |
c906108c | 81 | |
a14ed312 | 82 | static void gdbsim_open (char *args, int from_tty); |
c906108c | 83 | |
a14ed312 | 84 | static void gdbsim_close (int quitting); |
c906108c | 85 | |
a14ed312 | 86 | static void gdbsim_detach (char *args, int from_tty); |
c906108c | 87 | |
39f77062 | 88 | static void gdbsim_resume (ptid_t ptid, int step, enum target_signal siggnal); |
c906108c | 89 | |
39f77062 | 90 | static ptid_t gdbsim_wait (ptid_t ptid, struct target_waitstatus *status); |
c906108c | 91 | |
316f2060 | 92 | static void gdbsim_prepare_to_store (struct regcache *regcache); |
c906108c | 93 | |
a14ed312 | 94 | static void gdbsim_files_info (struct target_ops *target); |
c906108c | 95 | |
a14ed312 | 96 | static void gdbsim_mourn_inferior (void); |
c906108c | 97 | |
a14ed312 | 98 | static void gdbsim_stop (void); |
c906108c | 99 | |
a14ed312 | 100 | void simulator_command (char *args, int from_tty); |
c906108c SS |
101 | |
102 | /* Naming convention: | |
103 | ||
104 | sim_* are the interface to the simulator (see remote-sim.h). | |
105 | gdbsim_* are stuff which is internal to gdb. */ | |
106 | ||
107 | /* Forward data declarations */ | |
108 | extern struct target_ops gdbsim_ops; | |
109 | ||
110 | static int program_loaded = 0; | |
111 | ||
112 | /* We must keep track of whether the simulator has been opened or not because | |
113 | GDB can call a target's close routine twice, but sim_close doesn't allow | |
114 | this. We also need to record the result of sim_open so we can pass it | |
115 | back to the other sim_foo routines. */ | |
116 | static SIM_DESC gdbsim_desc = 0; | |
117 | ||
118 | static void | |
fba45db2 | 119 | dump_mem (char *buf, int len) |
c906108c SS |
120 | { |
121 | if (len <= 8) | |
122 | { | |
123 | if (len == 8 || len == 4) | |
124 | { | |
125 | long l[2]; | |
126 | memcpy (l, buf, len); | |
d4f3574e | 127 | printf_filtered ("\t0x%lx", l[0]); |
a6da1910 AC |
128 | if (len == 8) |
129 | printf_filtered (" 0x%lx", l[1]); | |
130 | printf_filtered ("\n"); | |
c906108c SS |
131 | } |
132 | else | |
133 | { | |
134 | int i; | |
135 | printf_filtered ("\t"); | |
136 | for (i = 0; i < len; i++) | |
137 | printf_filtered ("0x%x ", buf[i]); | |
138 | printf_filtered ("\n"); | |
139 | } | |
140 | } | |
141 | } | |
142 | ||
143 | static host_callback gdb_callback; | |
144 | static int callbacks_initialized = 0; | |
145 | ||
146 | /* Initialize gdb_callback. */ | |
147 | ||
148 | static void | |
fba45db2 | 149 | init_callbacks (void) |
c906108c | 150 | { |
c5aa993b | 151 | if (!callbacks_initialized) |
c906108c SS |
152 | { |
153 | gdb_callback = default_callback; | |
154 | gdb_callback.init (&gdb_callback); | |
155 | gdb_callback.write_stdout = gdb_os_write_stdout; | |
156 | gdb_callback.flush_stdout = gdb_os_flush_stdout; | |
157 | gdb_callback.write_stderr = gdb_os_write_stderr; | |
158 | gdb_callback.flush_stderr = gdb_os_flush_stderr; | |
159 | gdb_callback.printf_filtered = gdb_os_printf_filtered; | |
160 | gdb_callback.vprintf_filtered = gdb_os_vprintf_filtered; | |
161 | gdb_callback.evprintf_filtered = gdb_os_evprintf_filtered; | |
162 | gdb_callback.error = gdb_os_error; | |
163 | gdb_callback.poll_quit = gdb_os_poll_quit; | |
164 | gdb_callback.magic = HOST_CALLBACK_MAGIC; | |
165 | callbacks_initialized = 1; | |
166 | } | |
167 | } | |
168 | ||
169 | /* Release callbacks (free resources used by them). */ | |
170 | ||
171 | static void | |
fba45db2 | 172 | end_callbacks (void) |
c906108c SS |
173 | { |
174 | if (callbacks_initialized) | |
175 | { | |
176 | gdb_callback.shutdown (&gdb_callback); | |
177 | callbacks_initialized = 0; | |
178 | } | |
179 | } | |
180 | ||
181 | /* GDB version of os_write_stdout callback. */ | |
182 | ||
c5aa993b | 183 | static int |
fba45db2 | 184 | gdb_os_write_stdout (host_callback *p, const char *buf, int len) |
c906108c SS |
185 | { |
186 | int i; | |
187 | char b[2]; | |
188 | ||
d9fcf2fb | 189 | ui_file_write (gdb_stdtarg, buf, len); |
c906108c SS |
190 | return len; |
191 | } | |
192 | ||
193 | /* GDB version of os_flush_stdout callback. */ | |
194 | ||
195 | static void | |
fba45db2 | 196 | gdb_os_flush_stdout (host_callback *p) |
c906108c | 197 | { |
4ce44c66 | 198 | gdb_flush (gdb_stdtarg); |
c906108c SS |
199 | } |
200 | ||
201 | /* GDB version of os_write_stderr callback. */ | |
202 | ||
c5aa993b | 203 | static int |
fba45db2 | 204 | gdb_os_write_stderr (host_callback *p, const char *buf, int len) |
c906108c SS |
205 | { |
206 | int i; | |
207 | char b[2]; | |
208 | ||
c5aa993b | 209 | for (i = 0; i < len; i++) |
c906108c SS |
210 | { |
211 | b[0] = buf[i]; | |
212 | b[1] = 0; | |
22e8e3c7 | 213 | fputs_unfiltered (b, gdb_stdtargerr); |
c906108c SS |
214 | } |
215 | return len; | |
216 | } | |
217 | ||
218 | /* GDB version of os_flush_stderr callback. */ | |
219 | ||
220 | static void | |
fba45db2 | 221 | gdb_os_flush_stderr (host_callback *p) |
c906108c | 222 | { |
22e8e3c7 | 223 | gdb_flush (gdb_stdtargerr); |
c906108c SS |
224 | } |
225 | ||
226 | /* GDB version of printf_filtered callback. */ | |
227 | ||
c906108c | 228 | static void |
c5aa993b | 229 | gdb_os_printf_filtered (host_callback * p, const char *format,...) |
c906108c SS |
230 | { |
231 | va_list args; | |
c906108c | 232 | va_start (args, format); |
c906108c SS |
233 | |
234 | vfprintf_filtered (gdb_stdout, format, args); | |
235 | ||
236 | va_end (args); | |
237 | } | |
238 | ||
239 | /* GDB version of error vprintf_filtered. */ | |
240 | ||
c906108c | 241 | static void |
c5aa993b | 242 | gdb_os_vprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c SS |
243 | { |
244 | vfprintf_filtered (gdb_stdout, format, ap); | |
245 | } | |
246 | ||
247 | /* GDB version of error evprintf_filtered. */ | |
248 | ||
c906108c | 249 | static void |
c5aa993b | 250 | gdb_os_evprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c SS |
251 | { |
252 | vfprintf_filtered (gdb_stderr, format, ap); | |
253 | } | |
254 | ||
255 | /* GDB version of error callback. */ | |
256 | ||
c906108c | 257 | static void |
c5aa993b | 258 | gdb_os_error (host_callback * p, const char *format,...) |
c906108c | 259 | { |
9a4105ab AC |
260 | if (deprecated_error_hook) |
261 | (*deprecated_error_hook) (); | |
c5aa993b | 262 | else |
c906108c SS |
263 | { |
264 | va_list args; | |
c906108c | 265 | va_start (args, format); |
4ce44c66 | 266 | verror (format, args); |
c906108c | 267 | va_end (args); |
c906108c SS |
268 | } |
269 | } | |
270 | ||
8238d0bf AC |
271 | int |
272 | one2one_register_sim_regno (int regnum) | |
273 | { | |
274 | /* Only makes sense to supply raw registers. */ | |
f57d151a | 275 | gdb_assert (regnum >= 0 && regnum < gdbarch_num_regs (current_gdbarch)); |
8238d0bf AC |
276 | return regnum; |
277 | } | |
278 | ||
c906108c | 279 | static void |
56be3814 | 280 | gdbsim_fetch_register (struct regcache *regcache, int regno) |
c906108c | 281 | { |
c5aa993b | 282 | if (regno == -1) |
c906108c | 283 | { |
f57d151a | 284 | for (regno = 0; regno < gdbarch_num_regs (current_gdbarch); regno++) |
56be3814 | 285 | gdbsim_fetch_register (regcache, regno); |
8238d0bf | 286 | return; |
c906108c | 287 | } |
8238d0bf | 288 | |
474c1661 | 289 | switch (gdbarch_register_sim_regno (current_gdbarch, regno)) |
c906108c | 290 | { |
8238d0bf AC |
291 | case LEGACY_SIM_REGNO_IGNORE: |
292 | break; | |
293 | case SIM_REGNO_DOES_NOT_EXIST: | |
294 | { | |
295 | /* For moment treat a `does not exist' register the same way | |
296 | as an ``unavailable'' register. */ | |
d9d9c31f | 297 | char buf[MAX_REGISTER_SIZE]; |
8238d0bf | 298 | int nr_bytes; |
d9d9c31f | 299 | memset (buf, 0, MAX_REGISTER_SIZE); |
56be3814 | 300 | regcache_raw_supply (regcache, regno, buf); |
8238d0bf AC |
301 | break; |
302 | } | |
56be3814 | 303 | |
8238d0bf AC |
304 | default: |
305 | { | |
306 | static int warn_user = 1; | |
d9d9c31f | 307 | char buf[MAX_REGISTER_SIZE]; |
8238d0bf | 308 | int nr_bytes; |
f57d151a | 309 | gdb_assert (regno >= 0 && regno < gdbarch_num_regs (current_gdbarch)); |
d9d9c31f | 310 | memset (buf, 0, MAX_REGISTER_SIZE); |
d4f3574e | 311 | nr_bytes = sim_fetch_register (gdbsim_desc, |
474c1661 UW |
312 | gdbarch_register_sim_regno |
313 | (current_gdbarch, regno), | |
314 | buf, | |
315 | register_size (current_gdbarch, regno)); | |
3acba339 | 316 | if (nr_bytes > 0 && nr_bytes != register_size (current_gdbarch, regno) && warn_user) |
8238d0bf AC |
317 | { |
318 | fprintf_unfiltered (gdb_stderr, | |
319 | "Size of register %s (%d/%d) incorrect (%d instead of %d))", | |
c9f4d572 | 320 | gdbarch_register_name (current_gdbarch, regno), |
474c1661 UW |
321 | regno, |
322 | gdbarch_register_sim_regno | |
323 | (current_gdbarch, regno), | |
3acba339 | 324 | nr_bytes, register_size (current_gdbarch, regno)); |
8238d0bf AC |
325 | warn_user = 0; |
326 | } | |
327 | /* FIXME: cagney/2002-05-27: Should check `nr_bytes == 0' | |
278a7cf7 | 328 | indicating that GDB and the SIM have different ideas about |
8238d0bf AC |
329 | which registers are fetchable. */ |
330 | /* Else if (nr_bytes < 0): an old simulator, that doesn't | |
331 | think to return the register size. Just assume all is ok. */ | |
56be3814 | 332 | regcache_raw_supply (regcache, regno, buf); |
ea35711c | 333 | if (remote_debug) |
8238d0bf AC |
334 | { |
335 | printf_filtered ("gdbsim_fetch_register: %d", regno); | |
336 | /* FIXME: We could print something more intelligible. */ | |
3acba339 | 337 | dump_mem (buf, register_size (current_gdbarch, regno)); |
8238d0bf AC |
338 | } |
339 | break; | |
340 | } | |
c906108c SS |
341 | } |
342 | } | |
343 | ||
344 | ||
345 | static void | |
56be3814 | 346 | gdbsim_store_register (struct regcache *regcache, int regno) |
c906108c | 347 | { |
c5aa993b | 348 | if (regno == -1) |
c906108c | 349 | { |
f57d151a | 350 | for (regno = 0; regno < gdbarch_num_regs (current_gdbarch); regno++) |
56be3814 | 351 | gdbsim_store_register (regcache, regno); |
8238d0bf | 352 | return; |
c906108c | 353 | } |
474c1661 | 354 | else if (gdbarch_register_sim_regno (current_gdbarch, regno) >= 0) |
c906108c | 355 | { |
123a958e | 356 | char tmp[MAX_REGISTER_SIZE]; |
c906108c | 357 | int nr_bytes; |
56be3814 | 358 | regcache_cooked_read (regcache, regno, tmp); |
d4f3574e | 359 | nr_bytes = sim_store_register (gdbsim_desc, |
474c1661 UW |
360 | gdbarch_register_sim_regno |
361 | (current_gdbarch, regno), | |
3acba339 AC |
362 | tmp, register_size (current_gdbarch, regno)); |
363 | if (nr_bytes > 0 && nr_bytes != register_size (current_gdbarch, regno)) | |
8e65ff28 | 364 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 365 | _("Register size different to expected")); |
8238d0bf | 366 | /* FIXME: cagney/2002-05-27: Should check `nr_bytes == 0' |
278a7cf7 | 367 | indicating that GDB and the SIM have different ideas about |
8238d0bf | 368 | which registers are fetchable. */ |
ea35711c | 369 | if (remote_debug) |
c906108c SS |
370 | { |
371 | printf_filtered ("gdbsim_store_register: %d", regno); | |
372 | /* FIXME: We could print something more intelligible. */ | |
3acba339 | 373 | dump_mem (tmp, register_size (current_gdbarch, regno)); |
c906108c SS |
374 | } |
375 | } | |
376 | } | |
377 | ||
378 | /* Kill the running program. This may involve closing any open files | |
379 | and releasing other resources acquired by the simulated program. */ | |
380 | ||
381 | static void | |
fba45db2 | 382 | gdbsim_kill (void) |
c906108c | 383 | { |
ea35711c | 384 | if (remote_debug) |
c906108c SS |
385 | printf_filtered ("gdbsim_kill\n"); |
386 | ||
387 | /* There is no need to `kill' running simulator - the simulator is | |
52bb452f DJ |
388 | not running. Mourning it is enough. */ |
389 | target_mourn_inferior (); | |
c906108c SS |
390 | } |
391 | ||
392 | /* Load an executable file into the target process. This is expected to | |
393 | not only bring new code into the target process, but also to update | |
394 | GDB's symbol tables to match. */ | |
395 | ||
396 | static void | |
1986bccd | 397 | gdbsim_load (char *args, int fromtty) |
c906108c | 398 | { |
1986bccd AS |
399 | char **argv = buildargv (args); |
400 | char *prog; | |
401 | ||
402 | if (argv == NULL) | |
403 | nomem (0); | |
404 | ||
405 | make_cleanup_freeargv (argv); | |
406 | ||
407 | prog = tilde_expand (argv[0]); | |
408 | ||
409 | if (argv[1] != NULL) | |
410 | error (_("GDB sim does not yet support a load offset.")); | |
411 | ||
ea35711c | 412 | if (remote_debug) |
c906108c SS |
413 | printf_filtered ("gdbsim_load: prog \"%s\"\n", prog); |
414 | ||
c906108c SS |
415 | /* FIXME: We will print two messages on error. |
416 | Need error to either not print anything if passed NULL or need | |
417 | another routine that doesn't take any arguments. */ | |
418 | if (sim_load (gdbsim_desc, prog, NULL, fromtty) == SIM_RC_FAIL) | |
8a3fe4f8 | 419 | error (_("unable to load program")); |
c906108c SS |
420 | |
421 | /* FIXME: If a load command should reset the targets registers then | |
422 | a call to sim_create_inferior() should go here. */ | |
423 | ||
424 | program_loaded = 1; | |
425 | } | |
426 | ||
427 | ||
39f77062 | 428 | /* Start an inferior process and set inferior_ptid to its pid. |
c906108c SS |
429 | EXEC_FILE is the file to run. |
430 | ARGS is a string containing the arguments to the program. | |
431 | ENV is the environment vector to pass. Errors reported with error(). | |
432 | On VxWorks and various standalone systems, we ignore exec_file. */ | |
433 | /* This is called not only when we first attach, but also when the | |
434 | user types "run" after having attached. */ | |
435 | ||
436 | static void | |
c27cda74 | 437 | gdbsim_create_inferior (char *exec_file, char *args, char **env, int from_tty) |
c906108c SS |
438 | { |
439 | int len; | |
c5aa993b | 440 | char *arg_buf, **argv; |
c906108c SS |
441 | |
442 | if (exec_file == 0 || exec_bfd == 0) | |
8a3fe4f8 | 443 | warning (_("No executable file specified.")); |
c5aa993b | 444 | if (!program_loaded) |
8a3fe4f8 | 445 | warning (_("No program loaded.")); |
c906108c | 446 | |
ea35711c | 447 | if (remote_debug) |
c906108c | 448 | printf_filtered ("gdbsim_create_inferior: exec_file \"%s\", args \"%s\"\n", |
c5aa993b | 449 | (exec_file ? exec_file : "(NULL)"), |
c906108c SS |
450 | args); |
451 | ||
c5aa993b | 452 | gdbsim_kill (); |
c906108c SS |
453 | remove_breakpoints (); |
454 | init_wait_for_inferior (); | |
455 | ||
456 | if (exec_file != NULL) | |
457 | { | |
c5aa993b | 458 | len = strlen (exec_file) + 1 + strlen (args) + 1 + /*slop */ 10; |
c906108c SS |
459 | arg_buf = (char *) alloca (len); |
460 | arg_buf[0] = '\0'; | |
461 | strcat (arg_buf, exec_file); | |
462 | strcat (arg_buf, " "); | |
463 | strcat (arg_buf, args); | |
464 | argv = buildargv (arg_buf); | |
7a292a7a | 465 | make_cleanup_freeargv (argv); |
c906108c SS |
466 | } |
467 | else | |
468 | argv = NULL; | |
469 | sim_create_inferior (gdbsim_desc, exec_bfd, argv, env); | |
470 | ||
39f77062 | 471 | inferior_ptid = pid_to_ptid (42); |
52bb452f | 472 | target_mark_running (&gdbsim_ops); |
c5aa993b | 473 | insert_breakpoints (); /* Needed to get correct instruction in cache */ |
c906108c SS |
474 | |
475 | clear_proceed_status (); | |
c906108c SS |
476 | } |
477 | ||
478 | /* The open routine takes the rest of the parameters from the command, | |
479 | and (if successful) pushes a new target onto the stack. | |
480 | Targets should supply this routine, if only to provide an error message. */ | |
481 | /* Called when selecting the simulator. EG: (gdb) target sim name. */ | |
482 | ||
483 | static void | |
fba45db2 | 484 | gdbsim_open (char *args, int from_tty) |
c906108c SS |
485 | { |
486 | int len; | |
487 | char *arg_buf; | |
488 | char **argv; | |
489 | ||
ea35711c | 490 | if (remote_debug) |
c906108c SS |
491 | printf_filtered ("gdbsim_open: args \"%s\"\n", args ? args : "(null)"); |
492 | ||
493 | /* Remove current simulator if one exists. Only do this if the simulator | |
494 | has been opened because sim_close requires it. | |
495 | This is important because the call to push_target below will cause | |
496 | sim_close to be called if the simulator is already open, but push_target | |
497 | is called after sim_open! We can't move the call to push_target before | |
498 | the call to sim_open because sim_open may invoke `error'. */ | |
499 | if (gdbsim_desc != NULL) | |
500 | unpush_target (&gdbsim_ops); | |
501 | ||
c5aa993b | 502 | len = (7 + 1 /* gdbsim */ |
c906108c SS |
503 | + strlen (" -E little") |
504 | + strlen (" --architecture=xxxxxxxxxx") | |
505 | + (args ? strlen (args) : 0) | |
c5aa993b | 506 | + 50) /* slack */ ; |
c906108c | 507 | arg_buf = (char *) alloca (len); |
c5aa993b | 508 | strcpy (arg_buf, "gdbsim"); /* 7 */ |
b6d373df DJ |
509 | /* Specify the byte order for the target when it is explicitly |
510 | specified by the user (not auto detected). */ | |
511 | switch (selected_byte_order ()) | |
c906108c | 512 | { |
a8cf2722 AC |
513 | case BFD_ENDIAN_BIG: |
514 | strcat (arg_buf, " -E big"); | |
515 | break; | |
516 | case BFD_ENDIAN_LITTLE: | |
517 | strcat (arg_buf, " -E little"); | |
518 | break; | |
519 | case BFD_ENDIAN_UNKNOWN: | |
520 | break; | |
c906108c SS |
521 | } |
522 | /* Specify the architecture of the target when it has been | |
523 | explicitly specified */ | |
a8cf2722 | 524 | if (selected_architecture_name () != NULL) |
c906108c SS |
525 | { |
526 | strcat (arg_buf, " --architecture="); | |
a8cf2722 | 527 | strcat (arg_buf, selected_architecture_name ()); |
c906108c SS |
528 | } |
529 | /* finally, any explicit args */ | |
530 | if (args) | |
531 | { | |
c5aa993b | 532 | strcat (arg_buf, " "); /* 1 */ |
c906108c SS |
533 | strcat (arg_buf, args); |
534 | } | |
535 | argv = buildargv (arg_buf); | |
536 | if (argv == NULL) | |
8a3fe4f8 | 537 | error (_("Insufficient memory available to allocate simulator arg list.")); |
7a292a7a | 538 | make_cleanup_freeargv (argv); |
c906108c SS |
539 | |
540 | init_callbacks (); | |
541 | gdbsim_desc = sim_open (SIM_OPEN_DEBUG, &gdb_callback, exec_bfd, argv); | |
542 | ||
543 | if (gdbsim_desc == 0) | |
8a3fe4f8 | 544 | error (_("unable to create simulator instance")); |
c906108c SS |
545 | |
546 | push_target (&gdbsim_ops); | |
c906108c | 547 | printf_filtered ("Connected to the simulator.\n"); |
52bb452f DJ |
548 | |
549 | /* There's nothing running after "target sim" or "load"; not until | |
550 | "run". */ | |
551 | inferior_ptid = null_ptid; | |
552 | target_mark_exited (&gdbsim_ops); | |
c906108c SS |
553 | } |
554 | ||
555 | /* Does whatever cleanup is required for a target that we are no longer | |
556 | going to be calling. Argument says whether we are quitting gdb and | |
557 | should not get hung in case of errors, or whether we want a clean | |
558 | termination even if it takes a while. This routine is automatically | |
559 | always called just before a routine is popped off the target stack. | |
560 | Closing file descriptors and freeing memory are typical things it should | |
561 | do. */ | |
562 | /* Close out all files and local state before this target loses control. */ | |
563 | ||
564 | static void | |
fba45db2 | 565 | gdbsim_close (int quitting) |
c906108c | 566 | { |
ea35711c | 567 | if (remote_debug) |
c906108c SS |
568 | printf_filtered ("gdbsim_close: quitting %d\n", quitting); |
569 | ||
570 | program_loaded = 0; | |
571 | ||
572 | if (gdbsim_desc != NULL) | |
573 | { | |
574 | sim_close (gdbsim_desc, quitting); | |
575 | gdbsim_desc = NULL; | |
576 | } | |
577 | ||
578 | end_callbacks (); | |
75660bc0 | 579 | generic_mourn_inferior (); |
c906108c SS |
580 | } |
581 | ||
582 | /* Takes a program previously attached to and detaches it. | |
583 | The program may resume execution (some targets do, some don't) and will | |
584 | no longer stop on signals, etc. We better not have left any breakpoints | |
585 | in the program or it'll die when it hits one. ARGS is arguments | |
586 | typed by the user (e.g. a signal to send the process). FROM_TTY | |
587 | says whether to be verbose or not. */ | |
588 | /* Terminate the open connection to the remote debugger. | |
589 | Use this when you want to detach and do something else with your gdb. */ | |
590 | ||
591 | static void | |
fba45db2 | 592 | gdbsim_detach (char *args, int from_tty) |
c906108c | 593 | { |
ea35711c | 594 | if (remote_debug) |
c906108c SS |
595 | printf_filtered ("gdbsim_detach: args \"%s\"\n", args); |
596 | ||
597 | pop_target (); /* calls gdbsim_close to do the real work */ | |
598 | if (from_tty) | |
599 | printf_filtered ("Ending simulator %s debugging\n", target_shortname); | |
600 | } | |
c5aa993b | 601 | |
c906108c SS |
602 | /* Resume execution of the target process. STEP says whether to single-step |
603 | or to run free; SIGGNAL is the signal value (e.g. SIGINT) to be given | |
604 | to the target, or zero for no signal. */ | |
605 | ||
606 | static enum target_signal resume_siggnal; | |
607 | static int resume_step; | |
608 | ||
609 | static void | |
39f77062 | 610 | gdbsim_resume (ptid_t ptid, int step, enum target_signal siggnal) |
c906108c | 611 | { |
39f77062 | 612 | if (PIDGET (inferior_ptid) != 42) |
8a3fe4f8 | 613 | error (_("The program is not being run.")); |
c906108c | 614 | |
ea35711c | 615 | if (remote_debug) |
c906108c SS |
616 | printf_filtered ("gdbsim_resume: step %d, signal %d\n", step, siggnal); |
617 | ||
618 | resume_siggnal = siggnal; | |
619 | resume_step = step; | |
620 | } | |
621 | ||
622 | /* Notify the simulator of an asynchronous request to stop. | |
c5aa993b | 623 | |
c906108c SS |
624 | The simulator shall ensure that the stop request is eventually |
625 | delivered to the simulator. If the call is made while the | |
626 | simulator is not running then the stop request is processed when | |
627 | the simulator is next resumed. | |
628 | ||
629 | For simulators that do not support this operation, just abort */ | |
630 | ||
631 | static void | |
fba45db2 | 632 | gdbsim_stop (void) |
c906108c | 633 | { |
c5aa993b | 634 | if (!sim_stop (gdbsim_desc)) |
c906108c SS |
635 | { |
636 | quit (); | |
637 | } | |
638 | } | |
639 | ||
640 | /* GDB version of os_poll_quit callback. | |
8a0ce09a | 641 | Taken from gdb/util.c - should be in a library. */ |
c906108c SS |
642 | |
643 | static int | |
fba45db2 | 644 | gdb_os_poll_quit (host_callback *p) |
c906108c | 645 | { |
98bbd631 AC |
646 | if (deprecated_ui_loop_hook != NULL) |
647 | deprecated_ui_loop_hook (0); | |
7a292a7a | 648 | |
c5aa993b | 649 | if (quit_flag) /* gdb's idea of quit */ |
c906108c | 650 | { |
c5aa993b | 651 | quit_flag = 0; /* we've stolen it */ |
c906108c SS |
652 | return 1; |
653 | } | |
654 | else if (immediate_quit) | |
655 | { | |
656 | return 1; | |
657 | } | |
658 | return 0; | |
659 | } | |
660 | ||
661 | /* Wait for inferior process to do something. Return pid of child, | |
662 | or -1 in case of error; store status through argument pointer STATUS, | |
663 | just as `wait' would. */ | |
664 | ||
665 | static void | |
fba45db2 | 666 | gdbsim_cntrl_c (int signo) |
c906108c SS |
667 | { |
668 | gdbsim_stop (); | |
669 | } | |
670 | ||
39f77062 KB |
671 | static ptid_t |
672 | gdbsim_wait (ptid_t ptid, struct target_waitstatus *status) | |
c906108c SS |
673 | { |
674 | static RETSIGTYPE (*prev_sigint) (); | |
675 | int sigrc = 0; | |
676 | enum sim_stop reason = sim_running; | |
677 | ||
ea35711c | 678 | if (remote_debug) |
c906108c SS |
679 | printf_filtered ("gdbsim_wait\n"); |
680 | ||
681 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) | |
682 | { | |
683 | struct sigaction sa, osa; | |
684 | sa.sa_handler = gdbsim_cntrl_c; | |
685 | sigemptyset (&sa.sa_mask); | |
686 | sa.sa_flags = 0; | |
687 | sigaction (SIGINT, &sa, &osa); | |
688 | prev_sigint = osa.sa_handler; | |
689 | } | |
690 | #else | |
691 | prev_sigint = signal (SIGINT, gdbsim_cntrl_c); | |
692 | #endif | |
aba6488e | 693 | sim_resume (gdbsim_desc, resume_step, resume_siggnal); |
c906108c SS |
694 | signal (SIGINT, prev_sigint); |
695 | resume_step = 0; | |
696 | ||
697 | sim_stop_reason (gdbsim_desc, &reason, &sigrc); | |
698 | ||
699 | switch (reason) | |
700 | { | |
701 | case sim_exited: | |
702 | status->kind = TARGET_WAITKIND_EXITED; | |
703 | status->value.integer = sigrc; | |
704 | break; | |
705 | case sim_stopped: | |
706 | switch (sigrc) | |
707 | { | |
aba6488e | 708 | case TARGET_SIGNAL_ABRT: |
c906108c SS |
709 | quit (); |
710 | break; | |
aba6488e MM |
711 | case TARGET_SIGNAL_INT: |
712 | case TARGET_SIGNAL_TRAP: | |
c906108c SS |
713 | default: |
714 | status->kind = TARGET_WAITKIND_STOPPED; | |
aba6488e | 715 | status->value.sig = sigrc; |
c906108c SS |
716 | break; |
717 | } | |
718 | break; | |
719 | case sim_signalled: | |
720 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
aba6488e | 721 | status->value.sig = sigrc; |
c906108c SS |
722 | break; |
723 | case sim_running: | |
724 | case sim_polling: | |
725 | /* FIXME: Is this correct? */ | |
726 | break; | |
727 | } | |
728 | ||
39f77062 | 729 | return inferior_ptid; |
c906108c SS |
730 | } |
731 | ||
732 | /* Get ready to modify the registers array. On machines which store | |
733 | individual registers, this doesn't need to do anything. On machines | |
734 | which store all the registers in one fell swoop, this makes sure | |
735 | that registers contains all the registers from the program being | |
736 | debugged. */ | |
737 | ||
738 | static void | |
316f2060 | 739 | gdbsim_prepare_to_store (struct regcache *regcache) |
c906108c SS |
740 | { |
741 | /* Do nothing, since we can store individual regs */ | |
742 | } | |
743 | ||
d93bce06 KB |
744 | /* Transfer LEN bytes between GDB address MYADDR and target address |
745 | MEMADDR. If WRITE is non-zero, transfer them to the target, | |
746 | otherwise transfer them from the target. TARGET is unused. | |
747 | ||
748 | Returns the number of bytes transferred. */ | |
749 | ||
c906108c | 750 | static int |
8d7337bf | 751 | gdbsim_xfer_inferior_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, |
0a65a603 AC |
752 | int write, struct mem_attrib *attrib, |
753 | struct target_ops *target) | |
c906108c | 754 | { |
52bb452f DJ |
755 | /* If no program is running yet, then ignore the simulator for |
756 | memory. Pass the request down to the next target, hopefully | |
757 | an exec file. */ | |
758 | if (!target_has_execution) | |
759 | return 0; | |
760 | ||
c5aa993b | 761 | if (!program_loaded) |
8a3fe4f8 | 762 | error (_("No program loaded.")); |
c906108c | 763 | |
ea35711c | 764 | if (remote_debug) |
c906108c | 765 | { |
d4f3574e SS |
766 | /* FIXME: Send to something other than STDOUT? */ |
767 | printf_filtered ("gdbsim_xfer_inferior_memory: myaddr 0x"); | |
768 | gdb_print_host_address (myaddr, gdb_stdout); | |
769 | printf_filtered (", memaddr 0x%s, len %d, write %d\n", | |
770 | paddr_nz (memaddr), len, write); | |
ea35711c | 771 | if (remote_debug && write) |
c5aa993b | 772 | dump_mem (myaddr, len); |
c906108c SS |
773 | } |
774 | ||
775 | if (write) | |
776 | { | |
777 | len = sim_write (gdbsim_desc, memaddr, myaddr, len); | |
778 | } | |
c5aa993b | 779 | else |
c906108c SS |
780 | { |
781 | len = sim_read (gdbsim_desc, memaddr, myaddr, len); | |
ea35711c | 782 | if (remote_debug && len > 0) |
c5aa993b JM |
783 | dump_mem (myaddr, len); |
784 | } | |
c906108c SS |
785 | return len; |
786 | } | |
787 | ||
788 | static void | |
fba45db2 | 789 | gdbsim_files_info (struct target_ops *target) |
c906108c SS |
790 | { |
791 | char *file = "nothing"; | |
792 | ||
793 | if (exec_bfd) | |
794 | file = bfd_get_filename (exec_bfd); | |
795 | ||
ea35711c | 796 | if (remote_debug) |
c906108c SS |
797 | printf_filtered ("gdbsim_files_info: file \"%s\"\n", file); |
798 | ||
799 | if (exec_bfd) | |
800 | { | |
801 | printf_filtered ("\tAttached to %s running program %s\n", | |
802 | target_shortname, file); | |
803 | sim_info (gdbsim_desc, 0); | |
804 | } | |
805 | } | |
806 | ||
807 | /* Clear the simulator's notion of what the break points are. */ | |
808 | ||
809 | static void | |
fba45db2 | 810 | gdbsim_mourn_inferior (void) |
c5aa993b | 811 | { |
ea35711c | 812 | if (remote_debug) |
c906108c SS |
813 | printf_filtered ("gdbsim_mourn_inferior:\n"); |
814 | ||
815 | remove_breakpoints (); | |
52bb452f | 816 | target_mark_exited (&gdbsim_ops); |
c906108c SS |
817 | generic_mourn_inferior (); |
818 | } | |
819 | ||
c906108c SS |
820 | /* Pass the command argument through to the simulator verbatim. The |
821 | simulator must do any command interpretation work. */ | |
822 | ||
823 | void | |
fba45db2 | 824 | simulator_command (char *args, int from_tty) |
c906108c SS |
825 | { |
826 | if (gdbsim_desc == NULL) | |
827 | { | |
828 | ||
829 | /* PREVIOUSLY: The user may give a command before the simulator | |
830 | is opened. [...] (??? assuming of course one wishes to | |
831 | continue to allow commands to be sent to unopened simulators, | |
832 | which isn't entirely unreasonable). */ | |
833 | ||
834 | /* The simulator is a builtin abstraction of a remote target. | |
835 | Consistent with that model, access to the simulator, via sim | |
836 | commands, is restricted to the period when the channel to the | |
837 | simulator is open. */ | |
838 | ||
8a3fe4f8 | 839 | error (_("Not connected to the simulator target")); |
c906108c SS |
840 | } |
841 | ||
842 | sim_do_command (gdbsim_desc, args); | |
843 | ||
844 | /* Invalidate the register cache, in case the simulator command does | |
845 | something funny. */ | |
c5aa993b | 846 | registers_changed (); |
c906108c SS |
847 | } |
848 | ||
849 | /* Define the target subroutine names */ | |
850 | ||
c5aa993b JM |
851 | struct target_ops gdbsim_ops; |
852 | ||
853 | static void | |
854 | init_gdbsim_ops (void) | |
855 | { | |
856 | gdbsim_ops.to_shortname = "sim"; | |
857 | gdbsim_ops.to_longname = "simulator"; | |
858 | gdbsim_ops.to_doc = "Use the compiled-in simulator."; | |
859 | gdbsim_ops.to_open = gdbsim_open; | |
860 | gdbsim_ops.to_close = gdbsim_close; | |
c5aa993b | 861 | gdbsim_ops.to_detach = gdbsim_detach; |
c5aa993b JM |
862 | gdbsim_ops.to_resume = gdbsim_resume; |
863 | gdbsim_ops.to_wait = gdbsim_wait; | |
c5aa993b JM |
864 | gdbsim_ops.to_fetch_registers = gdbsim_fetch_register; |
865 | gdbsim_ops.to_store_registers = gdbsim_store_register; | |
866 | gdbsim_ops.to_prepare_to_store = gdbsim_prepare_to_store; | |
c8e73a31 | 867 | gdbsim_ops.deprecated_xfer_memory = gdbsim_xfer_inferior_memory; |
c5aa993b | 868 | gdbsim_ops.to_files_info = gdbsim_files_info; |
8181d85f DJ |
869 | gdbsim_ops.to_insert_breakpoint = memory_insert_breakpoint; |
870 | gdbsim_ops.to_remove_breakpoint = memory_remove_breakpoint; | |
c5aa993b JM |
871 | gdbsim_ops.to_kill = gdbsim_kill; |
872 | gdbsim_ops.to_load = gdbsim_load; | |
c5aa993b | 873 | gdbsim_ops.to_create_inferior = gdbsim_create_inferior; |
c5aa993b | 874 | gdbsim_ops.to_mourn_inferior = gdbsim_mourn_inferior; |
c5aa993b | 875 | gdbsim_ops.to_stop = gdbsim_stop; |
c5aa993b | 876 | gdbsim_ops.to_stratum = process_stratum; |
c5aa993b JM |
877 | gdbsim_ops.to_has_all_memory = 1; |
878 | gdbsim_ops.to_has_memory = 1; | |
879 | gdbsim_ops.to_has_stack = 1; | |
880 | gdbsim_ops.to_has_registers = 1; | |
881 | gdbsim_ops.to_has_execution = 1; | |
c5aa993b | 882 | gdbsim_ops.to_magic = OPS_MAGIC; |
c906108c SS |
883 | |
884 | #ifdef TARGET_REDEFINE_DEFAULT_OPS | |
885 | TARGET_REDEFINE_DEFAULT_OPS (&gdbsim_ops); | |
886 | #endif | |
887 | } | |
888 | ||
889 | void | |
fba45db2 | 890 | _initialize_remote_sim (void) |
c906108c | 891 | { |
c5aa993b | 892 | init_gdbsim_ops (); |
c906108c SS |
893 | add_target (&gdbsim_ops); |
894 | ||
24ec834b | 895 | add_com ("sim", class_obscure, simulator_command, |
1bedd215 | 896 | _("Send a command to the simulator.")); |
c906108c | 897 | } |