Commit | Line | Data |
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c906108c | 1 | /* Generic remote debugging interface for simulators. |
0a65a603 | 2 | |
197e01b6 | 3 | Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, |
8d7337bf | 4 | 2002, 2004, 2005 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 | |
13 | the Free Software Foundation; either version 2 of the License, or | |
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 JM |
21 | You should have received a copy of the GNU General Public License |
22 | along with this program; if not, write to the Free Software | |
197e01b6 EZ |
23 | Foundation, Inc., 51 Franklin Street, Fifth Floor, |
24 | Boston, MA 02110-1301, USA. */ | |
c906108c SS |
25 | |
26 | #include "defs.h" | |
27 | #include "inferior.h" | |
c906108c SS |
28 | #include "value.h" |
29 | #include "gdb_string.h" | |
30 | #include <ctype.h> | |
31 | #include <fcntl.h> | |
32 | #include <signal.h> | |
33 | #include <setjmp.h> | |
34 | #include <errno.h> | |
35 | #include "terminal.h" | |
36 | #include "target.h" | |
37 | #include "gdbcore.h" | |
3c25f8c7 AC |
38 | #include "gdb/callback.h" |
39 | #include "gdb/remote-sim.h" | |
c906108c SS |
40 | #include "remote-utils.h" |
41 | #include "command.h" | |
4e052eda | 42 | #include "regcache.h" |
8238d0bf AC |
43 | #include "gdb_assert.h" |
44 | #include "sim-regno.h" | |
a8cf2722 | 45 | #include "arch-utils.h" |
c906108c SS |
46 | |
47 | /* Prototypes */ | |
48 | ||
a14ed312 | 49 | extern void _initialize_remote_sim (void); |
392a587b | 50 | |
a14ed312 | 51 | static void dump_mem (char *buf, int len); |
c906108c | 52 | |
a14ed312 | 53 | static void init_callbacks (void); |
c906108c | 54 | |
a14ed312 | 55 | static void end_callbacks (void); |
c906108c | 56 | |
a14ed312 | 57 | static int gdb_os_write_stdout (host_callback *, const char *, int); |
c906108c | 58 | |
a14ed312 | 59 | static void gdb_os_flush_stdout (host_callback *); |
c906108c | 60 | |
a14ed312 | 61 | static int gdb_os_write_stderr (host_callback *, const char *, int); |
c906108c | 62 | |
a14ed312 | 63 | static void gdb_os_flush_stderr (host_callback *); |
c906108c | 64 | |
a14ed312 | 65 | static int gdb_os_poll_quit (host_callback *); |
c906108c SS |
66 | |
67 | /* printf_filtered is depreciated */ | |
a14ed312 | 68 | static void gdb_os_printf_filtered (host_callback *, const char *, ...); |
c906108c | 69 | |
a14ed312 | 70 | static void gdb_os_vprintf_filtered (host_callback *, const char *, va_list); |
c906108c | 71 | |
a14ed312 | 72 | static void gdb_os_evprintf_filtered (host_callback *, const char *, va_list); |
c906108c | 73 | |
a14ed312 | 74 | static void gdb_os_error (host_callback *, const char *, ...); |
c906108c | 75 | |
a14ed312 | 76 | static void gdbsim_fetch_register (int regno); |
c906108c | 77 | |
a14ed312 | 78 | static void gdbsim_store_register (int regno); |
c906108c | 79 | |
a14ed312 | 80 | static void gdbsim_kill (void); |
c906108c | 81 | |
a14ed312 | 82 | static void gdbsim_load (char *prog, int fromtty); |
c906108c | 83 | |
a14ed312 | 84 | static void gdbsim_open (char *args, int from_tty); |
c906108c | 85 | |
a14ed312 | 86 | static void gdbsim_close (int quitting); |
c906108c | 87 | |
a14ed312 | 88 | static void gdbsim_detach (char *args, int from_tty); |
c906108c | 89 | |
39f77062 | 90 | static void gdbsim_resume (ptid_t ptid, int step, enum target_signal siggnal); |
c906108c | 91 | |
39f77062 | 92 | static ptid_t gdbsim_wait (ptid_t ptid, struct target_waitstatus *status); |
c906108c | 93 | |
a14ed312 | 94 | static void gdbsim_prepare_to_store (void); |
c906108c | 95 | |
a14ed312 | 96 | static void gdbsim_files_info (struct target_ops *target); |
c906108c | 97 | |
a14ed312 | 98 | static void gdbsim_mourn_inferior (void); |
c906108c | 99 | |
a14ed312 | 100 | static void gdbsim_stop (void); |
c906108c | 101 | |
a14ed312 | 102 | void simulator_command (char *args, int from_tty); |
c906108c SS |
103 | |
104 | /* Naming convention: | |
105 | ||
106 | sim_* are the interface to the simulator (see remote-sim.h). | |
107 | gdbsim_* are stuff which is internal to gdb. */ | |
108 | ||
109 | /* Forward data declarations */ | |
110 | extern struct target_ops gdbsim_ops; | |
111 | ||
112 | static int program_loaded = 0; | |
113 | ||
114 | /* We must keep track of whether the simulator has been opened or not because | |
115 | GDB can call a target's close routine twice, but sim_close doesn't allow | |
116 | this. We also need to record the result of sim_open so we can pass it | |
117 | back to the other sim_foo routines. */ | |
118 | static SIM_DESC gdbsim_desc = 0; | |
119 | ||
120 | static void | |
fba45db2 | 121 | dump_mem (char *buf, int len) |
c906108c SS |
122 | { |
123 | if (len <= 8) | |
124 | { | |
125 | if (len == 8 || len == 4) | |
126 | { | |
127 | long l[2]; | |
128 | memcpy (l, buf, len); | |
d4f3574e | 129 | printf_filtered ("\t0x%lx", l[0]); |
a6da1910 AC |
130 | if (len == 8) |
131 | printf_filtered (" 0x%lx", l[1]); | |
132 | printf_filtered ("\n"); | |
c906108c SS |
133 | } |
134 | else | |
135 | { | |
136 | int i; | |
137 | printf_filtered ("\t"); | |
138 | for (i = 0; i < len; i++) | |
139 | printf_filtered ("0x%x ", buf[i]); | |
140 | printf_filtered ("\n"); | |
141 | } | |
142 | } | |
143 | } | |
144 | ||
145 | static host_callback gdb_callback; | |
146 | static int callbacks_initialized = 0; | |
147 | ||
148 | /* Initialize gdb_callback. */ | |
149 | ||
150 | static void | |
fba45db2 | 151 | init_callbacks (void) |
c906108c | 152 | { |
c5aa993b | 153 | if (!callbacks_initialized) |
c906108c SS |
154 | { |
155 | gdb_callback = default_callback; | |
156 | gdb_callback.init (&gdb_callback); | |
157 | gdb_callback.write_stdout = gdb_os_write_stdout; | |
158 | gdb_callback.flush_stdout = gdb_os_flush_stdout; | |
159 | gdb_callback.write_stderr = gdb_os_write_stderr; | |
160 | gdb_callback.flush_stderr = gdb_os_flush_stderr; | |
161 | gdb_callback.printf_filtered = gdb_os_printf_filtered; | |
162 | gdb_callback.vprintf_filtered = gdb_os_vprintf_filtered; | |
163 | gdb_callback.evprintf_filtered = gdb_os_evprintf_filtered; | |
164 | gdb_callback.error = gdb_os_error; | |
165 | gdb_callback.poll_quit = gdb_os_poll_quit; | |
166 | gdb_callback.magic = HOST_CALLBACK_MAGIC; | |
167 | callbacks_initialized = 1; | |
168 | } | |
169 | } | |
170 | ||
171 | /* Release callbacks (free resources used by them). */ | |
172 | ||
173 | static void | |
fba45db2 | 174 | end_callbacks (void) |
c906108c SS |
175 | { |
176 | if (callbacks_initialized) | |
177 | { | |
178 | gdb_callback.shutdown (&gdb_callback); | |
179 | callbacks_initialized = 0; | |
180 | } | |
181 | } | |
182 | ||
183 | /* GDB version of os_write_stdout callback. */ | |
184 | ||
c5aa993b | 185 | static int |
fba45db2 | 186 | gdb_os_write_stdout (host_callback *p, const char *buf, int len) |
c906108c SS |
187 | { |
188 | int i; | |
189 | char b[2]; | |
190 | ||
d9fcf2fb | 191 | ui_file_write (gdb_stdtarg, buf, len); |
c906108c SS |
192 | return len; |
193 | } | |
194 | ||
195 | /* GDB version of os_flush_stdout callback. */ | |
196 | ||
197 | static void | |
fba45db2 | 198 | gdb_os_flush_stdout (host_callback *p) |
c906108c | 199 | { |
4ce44c66 | 200 | gdb_flush (gdb_stdtarg); |
c906108c SS |
201 | } |
202 | ||
203 | /* GDB version of os_write_stderr callback. */ | |
204 | ||
c5aa993b | 205 | static int |
fba45db2 | 206 | gdb_os_write_stderr (host_callback *p, const char *buf, int len) |
c906108c SS |
207 | { |
208 | int i; | |
209 | char b[2]; | |
210 | ||
c5aa993b | 211 | for (i = 0; i < len; i++) |
c906108c SS |
212 | { |
213 | b[0] = buf[i]; | |
214 | b[1] = 0; | |
22e8e3c7 | 215 | fputs_unfiltered (b, gdb_stdtargerr); |
c906108c SS |
216 | } |
217 | return len; | |
218 | } | |
219 | ||
220 | /* GDB version of os_flush_stderr callback. */ | |
221 | ||
222 | static void | |
fba45db2 | 223 | gdb_os_flush_stderr (host_callback *p) |
c906108c | 224 | { |
22e8e3c7 | 225 | gdb_flush (gdb_stdtargerr); |
c906108c SS |
226 | } |
227 | ||
228 | /* GDB version of printf_filtered callback. */ | |
229 | ||
c906108c | 230 | static void |
c5aa993b | 231 | gdb_os_printf_filtered (host_callback * p, const char *format,...) |
c906108c SS |
232 | { |
233 | va_list args; | |
c906108c | 234 | va_start (args, format); |
c906108c SS |
235 | |
236 | vfprintf_filtered (gdb_stdout, format, args); | |
237 | ||
238 | va_end (args); | |
239 | } | |
240 | ||
241 | /* GDB version of error vprintf_filtered. */ | |
242 | ||
c906108c | 243 | static void |
c5aa993b | 244 | gdb_os_vprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c SS |
245 | { |
246 | vfprintf_filtered (gdb_stdout, format, ap); | |
247 | } | |
248 | ||
249 | /* GDB version of error evprintf_filtered. */ | |
250 | ||
c906108c | 251 | static void |
c5aa993b | 252 | gdb_os_evprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c SS |
253 | { |
254 | vfprintf_filtered (gdb_stderr, format, ap); | |
255 | } | |
256 | ||
257 | /* GDB version of error callback. */ | |
258 | ||
c906108c | 259 | static void |
c5aa993b | 260 | gdb_os_error (host_callback * p, const char *format,...) |
c906108c | 261 | { |
9a4105ab AC |
262 | if (deprecated_error_hook) |
263 | (*deprecated_error_hook) (); | |
c5aa993b | 264 | else |
c906108c SS |
265 | { |
266 | va_list args; | |
c906108c | 267 | va_start (args, format); |
4ce44c66 | 268 | verror (format, args); |
c906108c | 269 | va_end (args); |
c906108c SS |
270 | } |
271 | } | |
272 | ||
8238d0bf AC |
273 | int |
274 | one2one_register_sim_regno (int regnum) | |
275 | { | |
276 | /* Only makes sense to supply raw registers. */ | |
277 | gdb_assert (regnum >= 0 && regnum < NUM_REGS); | |
278 | return regnum; | |
279 | } | |
280 | ||
c906108c | 281 | static void |
fba45db2 | 282 | gdbsim_fetch_register (int regno) |
c906108c | 283 | { |
c5aa993b | 284 | if (regno == -1) |
c906108c SS |
285 | { |
286 | for (regno = 0; regno < NUM_REGS; regno++) | |
287 | gdbsim_fetch_register (regno); | |
8238d0bf | 288 | return; |
c906108c | 289 | } |
8238d0bf AC |
290 | |
291 | switch (REGISTER_SIM_REGNO (regno)) | |
c906108c | 292 | { |
8238d0bf AC |
293 | case LEGACY_SIM_REGNO_IGNORE: |
294 | break; | |
295 | case SIM_REGNO_DOES_NOT_EXIST: | |
296 | { | |
297 | /* For moment treat a `does not exist' register the same way | |
298 | as an ``unavailable'' register. */ | |
d9d9c31f | 299 | char buf[MAX_REGISTER_SIZE]; |
8238d0bf | 300 | int nr_bytes; |
d9d9c31f | 301 | memset (buf, 0, MAX_REGISTER_SIZE); |
23a6d369 | 302 | regcache_raw_supply (current_regcache, regno, buf); |
8238d0bf AC |
303 | set_register_cached (regno, -1); |
304 | break; | |
305 | } | |
306 | default: | |
307 | { | |
308 | static int warn_user = 1; | |
d9d9c31f | 309 | char buf[MAX_REGISTER_SIZE]; |
8238d0bf AC |
310 | int nr_bytes; |
311 | gdb_assert (regno >= 0 && regno < NUM_REGS); | |
d9d9c31f | 312 | memset (buf, 0, MAX_REGISTER_SIZE); |
d4f3574e SS |
313 | nr_bytes = sim_fetch_register (gdbsim_desc, |
314 | REGISTER_SIM_REGNO (regno), | |
3acba339 AC |
315 | buf, register_size (current_gdbarch, regno)); |
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))", | |
320 | REGISTER_NAME (regno), | |
321 | regno, REGISTER_SIM_REGNO (regno), | |
3acba339 | 322 | nr_bytes, register_size (current_gdbarch, regno)); |
8238d0bf AC |
323 | warn_user = 0; |
324 | } | |
325 | /* FIXME: cagney/2002-05-27: Should check `nr_bytes == 0' | |
278a7cf7 | 326 | indicating that GDB and the SIM have different ideas about |
8238d0bf AC |
327 | which registers are fetchable. */ |
328 | /* Else if (nr_bytes < 0): an old simulator, that doesn't | |
329 | think to return the register size. Just assume all is ok. */ | |
23a6d369 | 330 | regcache_raw_supply (current_regcache, regno, buf); |
8238d0bf AC |
331 | if (sr_get_debug ()) |
332 | { | |
333 | printf_filtered ("gdbsim_fetch_register: %d", regno); | |
334 | /* FIXME: We could print something more intelligible. */ | |
3acba339 | 335 | dump_mem (buf, register_size (current_gdbarch, regno)); |
8238d0bf AC |
336 | } |
337 | break; | |
338 | } | |
c906108c SS |
339 | } |
340 | } | |
341 | ||
342 | ||
343 | static void | |
fba45db2 | 344 | gdbsim_store_register (int regno) |
c906108c | 345 | { |
c5aa993b | 346 | if (regno == -1) |
c906108c SS |
347 | { |
348 | for (regno = 0; regno < NUM_REGS; regno++) | |
349 | gdbsim_store_register (regno); | |
8238d0bf | 350 | return; |
c906108c | 351 | } |
8238d0bf | 352 | else if (REGISTER_SIM_REGNO (regno) >= 0) |
c906108c | 353 | { |
123a958e | 354 | char tmp[MAX_REGISTER_SIZE]; |
c906108c | 355 | int nr_bytes; |
4caf0990 | 356 | deprecated_read_register_gen (regno, tmp); |
d4f3574e SS |
357 | nr_bytes = sim_store_register (gdbsim_desc, |
358 | REGISTER_SIM_REGNO (regno), | |
3acba339 AC |
359 | tmp, register_size (current_gdbarch, regno)); |
360 | if (nr_bytes > 0 && nr_bytes != register_size (current_gdbarch, regno)) | |
8e65ff28 | 361 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 362 | _("Register size different to expected")); |
8238d0bf | 363 | /* FIXME: cagney/2002-05-27: Should check `nr_bytes == 0' |
278a7cf7 | 364 | indicating that GDB and the SIM have different ideas about |
8238d0bf | 365 | which registers are fetchable. */ |
c906108c SS |
366 | if (sr_get_debug ()) |
367 | { | |
368 | printf_filtered ("gdbsim_store_register: %d", regno); | |
369 | /* FIXME: We could print something more intelligible. */ | |
3acba339 | 370 | dump_mem (tmp, register_size (current_gdbarch, regno)); |
c906108c SS |
371 | } |
372 | } | |
373 | } | |
374 | ||
375 | /* Kill the running program. This may involve closing any open files | |
376 | and releasing other resources acquired by the simulated program. */ | |
377 | ||
378 | static void | |
fba45db2 | 379 | gdbsim_kill (void) |
c906108c SS |
380 | { |
381 | if (sr_get_debug ()) | |
382 | printf_filtered ("gdbsim_kill\n"); | |
383 | ||
384 | /* There is no need to `kill' running simulator - the simulator is | |
385 | not running */ | |
39f77062 | 386 | inferior_ptid = null_ptid; |
c906108c SS |
387 | } |
388 | ||
389 | /* Load an executable file into the target process. This is expected to | |
390 | not only bring new code into the target process, but also to update | |
391 | GDB's symbol tables to match. */ | |
392 | ||
393 | static void | |
fba45db2 | 394 | gdbsim_load (char *prog, int fromtty) |
c906108c SS |
395 | { |
396 | if (sr_get_debug ()) | |
397 | printf_filtered ("gdbsim_load: prog \"%s\"\n", prog); | |
398 | ||
39f77062 | 399 | inferior_ptid = null_ptid; |
c906108c SS |
400 | |
401 | /* FIXME: We will print two messages on error. | |
402 | Need error to either not print anything if passed NULL or need | |
403 | another routine that doesn't take any arguments. */ | |
404 | if (sim_load (gdbsim_desc, prog, NULL, fromtty) == SIM_RC_FAIL) | |
8a3fe4f8 | 405 | error (_("unable to load program")); |
c906108c SS |
406 | |
407 | /* FIXME: If a load command should reset the targets registers then | |
408 | a call to sim_create_inferior() should go here. */ | |
409 | ||
410 | program_loaded = 1; | |
411 | } | |
412 | ||
413 | ||
39f77062 | 414 | /* Start an inferior process and set inferior_ptid to its pid. |
c906108c SS |
415 | EXEC_FILE is the file to run. |
416 | ARGS is a string containing the arguments to the program. | |
417 | ENV is the environment vector to pass. Errors reported with error(). | |
418 | On VxWorks and various standalone systems, we ignore exec_file. */ | |
419 | /* This is called not only when we first attach, but also when the | |
420 | user types "run" after having attached. */ | |
421 | ||
422 | static void | |
c27cda74 | 423 | gdbsim_create_inferior (char *exec_file, char *args, char **env, int from_tty) |
c906108c SS |
424 | { |
425 | int len; | |
c5aa993b | 426 | char *arg_buf, **argv; |
c906108c SS |
427 | |
428 | if (exec_file == 0 || exec_bfd == 0) | |
8a3fe4f8 | 429 | warning (_("No executable file specified.")); |
c5aa993b | 430 | if (!program_loaded) |
8a3fe4f8 | 431 | warning (_("No program loaded.")); |
c906108c SS |
432 | |
433 | if (sr_get_debug ()) | |
434 | printf_filtered ("gdbsim_create_inferior: exec_file \"%s\", args \"%s\"\n", | |
c5aa993b | 435 | (exec_file ? exec_file : "(NULL)"), |
c906108c SS |
436 | args); |
437 | ||
c5aa993b | 438 | gdbsim_kill (); |
c906108c SS |
439 | remove_breakpoints (); |
440 | init_wait_for_inferior (); | |
441 | ||
442 | if (exec_file != NULL) | |
443 | { | |
c5aa993b | 444 | len = strlen (exec_file) + 1 + strlen (args) + 1 + /*slop */ 10; |
c906108c SS |
445 | arg_buf = (char *) alloca (len); |
446 | arg_buf[0] = '\0'; | |
447 | strcat (arg_buf, exec_file); | |
448 | strcat (arg_buf, " "); | |
449 | strcat (arg_buf, args); | |
450 | argv = buildargv (arg_buf); | |
7a292a7a | 451 | make_cleanup_freeargv (argv); |
c906108c SS |
452 | } |
453 | else | |
454 | argv = NULL; | |
455 | sim_create_inferior (gdbsim_desc, exec_bfd, argv, env); | |
456 | ||
39f77062 | 457 | inferior_ptid = pid_to_ptid (42); |
c5aa993b | 458 | insert_breakpoints (); /* Needed to get correct instruction in cache */ |
c906108c SS |
459 | |
460 | clear_proceed_status (); | |
461 | ||
462 | /* NB: Entry point already set by sim_create_inferior. */ | |
2acceee2 | 463 | proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 0); |
c906108c SS |
464 | } |
465 | ||
466 | /* The open routine takes the rest of the parameters from the command, | |
467 | and (if successful) pushes a new target onto the stack. | |
468 | Targets should supply this routine, if only to provide an error message. */ | |
469 | /* Called when selecting the simulator. EG: (gdb) target sim name. */ | |
470 | ||
471 | static void | |
fba45db2 | 472 | gdbsim_open (char *args, int from_tty) |
c906108c SS |
473 | { |
474 | int len; | |
475 | char *arg_buf; | |
476 | char **argv; | |
477 | ||
478 | if (sr_get_debug ()) | |
479 | printf_filtered ("gdbsim_open: args \"%s\"\n", args ? args : "(null)"); | |
480 | ||
481 | /* Remove current simulator if one exists. Only do this if the simulator | |
482 | has been opened because sim_close requires it. | |
483 | This is important because the call to push_target below will cause | |
484 | sim_close to be called if the simulator is already open, but push_target | |
485 | is called after sim_open! We can't move the call to push_target before | |
486 | the call to sim_open because sim_open may invoke `error'. */ | |
487 | if (gdbsim_desc != NULL) | |
488 | unpush_target (&gdbsim_ops); | |
489 | ||
c5aa993b | 490 | len = (7 + 1 /* gdbsim */ |
c906108c SS |
491 | + strlen (" -E little") |
492 | + strlen (" --architecture=xxxxxxxxxx") | |
493 | + (args ? strlen (args) : 0) | |
c5aa993b | 494 | + 50) /* slack */ ; |
c906108c | 495 | arg_buf = (char *) alloca (len); |
c5aa993b | 496 | strcpy (arg_buf, "gdbsim"); /* 7 */ |
c906108c SS |
497 | /* Specify the byte order for the target when it is both selectable |
498 | and explicitly specified by the user (not auto detected). */ | |
a8cf2722 | 499 | switch (selected_byte_order ()) |
c906108c | 500 | { |
a8cf2722 AC |
501 | case BFD_ENDIAN_BIG: |
502 | strcat (arg_buf, " -E big"); | |
503 | break; | |
504 | case BFD_ENDIAN_LITTLE: | |
505 | strcat (arg_buf, " -E little"); | |
506 | break; | |
507 | case BFD_ENDIAN_UNKNOWN: | |
508 | break; | |
c906108c SS |
509 | } |
510 | /* Specify the architecture of the target when it has been | |
511 | explicitly specified */ | |
a8cf2722 | 512 | if (selected_architecture_name () != NULL) |
c906108c SS |
513 | { |
514 | strcat (arg_buf, " --architecture="); | |
a8cf2722 | 515 | strcat (arg_buf, selected_architecture_name ()); |
c906108c SS |
516 | } |
517 | /* finally, any explicit args */ | |
518 | if (args) | |
519 | { | |
c5aa993b | 520 | strcat (arg_buf, " "); /* 1 */ |
c906108c SS |
521 | strcat (arg_buf, args); |
522 | } | |
523 | argv = buildargv (arg_buf); | |
524 | if (argv == NULL) | |
8a3fe4f8 | 525 | error (_("Insufficient memory available to allocate simulator arg list.")); |
7a292a7a | 526 | make_cleanup_freeargv (argv); |
c906108c SS |
527 | |
528 | init_callbacks (); | |
529 | gdbsim_desc = sim_open (SIM_OPEN_DEBUG, &gdb_callback, exec_bfd, argv); | |
530 | ||
531 | if (gdbsim_desc == 0) | |
8a3fe4f8 | 532 | error (_("unable to create simulator instance")); |
c906108c SS |
533 | |
534 | push_target (&gdbsim_ops); | |
535 | target_fetch_registers (-1); | |
536 | printf_filtered ("Connected to the simulator.\n"); | |
537 | } | |
538 | ||
539 | /* Does whatever cleanup is required for a target that we are no longer | |
540 | going to be calling. Argument says whether we are quitting gdb and | |
541 | should not get hung in case of errors, or whether we want a clean | |
542 | termination even if it takes a while. This routine is automatically | |
543 | always called just before a routine is popped off the target stack. | |
544 | Closing file descriptors and freeing memory are typical things it should | |
545 | do. */ | |
546 | /* Close out all files and local state before this target loses control. */ | |
547 | ||
548 | static void | |
fba45db2 | 549 | gdbsim_close (int quitting) |
c906108c SS |
550 | { |
551 | if (sr_get_debug ()) | |
552 | printf_filtered ("gdbsim_close: quitting %d\n", quitting); | |
553 | ||
554 | program_loaded = 0; | |
555 | ||
556 | if (gdbsim_desc != NULL) | |
557 | { | |
558 | sim_close (gdbsim_desc, quitting); | |
559 | gdbsim_desc = NULL; | |
560 | } | |
561 | ||
562 | end_callbacks (); | |
75660bc0 | 563 | generic_mourn_inferior (); |
c906108c SS |
564 | } |
565 | ||
566 | /* Takes a program previously attached to and detaches it. | |
567 | The program may resume execution (some targets do, some don't) and will | |
568 | no longer stop on signals, etc. We better not have left any breakpoints | |
569 | in the program or it'll die when it hits one. ARGS is arguments | |
570 | typed by the user (e.g. a signal to send the process). FROM_TTY | |
571 | says whether to be verbose or not. */ | |
572 | /* Terminate the open connection to the remote debugger. | |
573 | Use this when you want to detach and do something else with your gdb. */ | |
574 | ||
575 | static void | |
fba45db2 | 576 | gdbsim_detach (char *args, int from_tty) |
c906108c SS |
577 | { |
578 | if (sr_get_debug ()) | |
579 | printf_filtered ("gdbsim_detach: args \"%s\"\n", args); | |
580 | ||
581 | pop_target (); /* calls gdbsim_close to do the real work */ | |
582 | if (from_tty) | |
583 | printf_filtered ("Ending simulator %s debugging\n", target_shortname); | |
584 | } | |
c5aa993b | 585 | |
c906108c SS |
586 | /* Resume execution of the target process. STEP says whether to single-step |
587 | or to run free; SIGGNAL is the signal value (e.g. SIGINT) to be given | |
588 | to the target, or zero for no signal. */ | |
589 | ||
590 | static enum target_signal resume_siggnal; | |
591 | static int resume_step; | |
592 | ||
593 | static void | |
39f77062 | 594 | gdbsim_resume (ptid_t ptid, int step, enum target_signal siggnal) |
c906108c | 595 | { |
39f77062 | 596 | if (PIDGET (inferior_ptid) != 42) |
8a3fe4f8 | 597 | error (_("The program is not being run.")); |
c906108c SS |
598 | |
599 | if (sr_get_debug ()) | |
600 | printf_filtered ("gdbsim_resume: step %d, signal %d\n", step, siggnal); | |
601 | ||
602 | resume_siggnal = siggnal; | |
603 | resume_step = step; | |
604 | } | |
605 | ||
606 | /* Notify the simulator of an asynchronous request to stop. | |
c5aa993b | 607 | |
c906108c SS |
608 | The simulator shall ensure that the stop request is eventually |
609 | delivered to the simulator. If the call is made while the | |
610 | simulator is not running then the stop request is processed when | |
611 | the simulator is next resumed. | |
612 | ||
613 | For simulators that do not support this operation, just abort */ | |
614 | ||
615 | static void | |
fba45db2 | 616 | gdbsim_stop (void) |
c906108c | 617 | { |
c5aa993b | 618 | if (!sim_stop (gdbsim_desc)) |
c906108c SS |
619 | { |
620 | quit (); | |
621 | } | |
622 | } | |
623 | ||
624 | /* GDB version of os_poll_quit callback. | |
8a0ce09a | 625 | Taken from gdb/util.c - should be in a library. */ |
c906108c SS |
626 | |
627 | static int | |
fba45db2 | 628 | gdb_os_poll_quit (host_callback *p) |
c906108c | 629 | { |
98bbd631 AC |
630 | if (deprecated_ui_loop_hook != NULL) |
631 | deprecated_ui_loop_hook (0); | |
7a292a7a | 632 | |
c5aa993b | 633 | if (quit_flag) /* gdb's idea of quit */ |
c906108c | 634 | { |
c5aa993b | 635 | quit_flag = 0; /* we've stolen it */ |
c906108c SS |
636 | return 1; |
637 | } | |
638 | else if (immediate_quit) | |
639 | { | |
640 | return 1; | |
641 | } | |
642 | return 0; | |
643 | } | |
644 | ||
645 | /* Wait for inferior process to do something. Return pid of child, | |
646 | or -1 in case of error; store status through argument pointer STATUS, | |
647 | just as `wait' would. */ | |
648 | ||
649 | static void | |
fba45db2 | 650 | gdbsim_cntrl_c (int signo) |
c906108c SS |
651 | { |
652 | gdbsim_stop (); | |
653 | } | |
654 | ||
39f77062 KB |
655 | static ptid_t |
656 | gdbsim_wait (ptid_t ptid, struct target_waitstatus *status) | |
c906108c SS |
657 | { |
658 | static RETSIGTYPE (*prev_sigint) (); | |
659 | int sigrc = 0; | |
660 | enum sim_stop reason = sim_running; | |
661 | ||
662 | if (sr_get_debug ()) | |
663 | printf_filtered ("gdbsim_wait\n"); | |
664 | ||
665 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) | |
666 | { | |
667 | struct sigaction sa, osa; | |
668 | sa.sa_handler = gdbsim_cntrl_c; | |
669 | sigemptyset (&sa.sa_mask); | |
670 | sa.sa_flags = 0; | |
671 | sigaction (SIGINT, &sa, &osa); | |
672 | prev_sigint = osa.sa_handler; | |
673 | } | |
674 | #else | |
675 | prev_sigint = signal (SIGINT, gdbsim_cntrl_c); | |
676 | #endif | |
aba6488e | 677 | sim_resume (gdbsim_desc, resume_step, resume_siggnal); |
c906108c SS |
678 | signal (SIGINT, prev_sigint); |
679 | resume_step = 0; | |
680 | ||
681 | sim_stop_reason (gdbsim_desc, &reason, &sigrc); | |
682 | ||
683 | switch (reason) | |
684 | { | |
685 | case sim_exited: | |
686 | status->kind = TARGET_WAITKIND_EXITED; | |
687 | status->value.integer = sigrc; | |
688 | break; | |
689 | case sim_stopped: | |
690 | switch (sigrc) | |
691 | { | |
aba6488e | 692 | case TARGET_SIGNAL_ABRT: |
c906108c SS |
693 | quit (); |
694 | break; | |
aba6488e MM |
695 | case TARGET_SIGNAL_INT: |
696 | case TARGET_SIGNAL_TRAP: | |
c906108c SS |
697 | default: |
698 | status->kind = TARGET_WAITKIND_STOPPED; | |
aba6488e | 699 | status->value.sig = sigrc; |
c906108c SS |
700 | break; |
701 | } | |
702 | break; | |
703 | case sim_signalled: | |
704 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
aba6488e | 705 | status->value.sig = sigrc; |
c906108c SS |
706 | break; |
707 | case sim_running: | |
708 | case sim_polling: | |
709 | /* FIXME: Is this correct? */ | |
710 | break; | |
711 | } | |
712 | ||
39f77062 | 713 | return inferior_ptid; |
c906108c SS |
714 | } |
715 | ||
716 | /* Get ready to modify the registers array. On machines which store | |
717 | individual registers, this doesn't need to do anything. On machines | |
718 | which store all the registers in one fell swoop, this makes sure | |
719 | that registers contains all the registers from the program being | |
720 | debugged. */ | |
721 | ||
722 | static void | |
fba45db2 | 723 | gdbsim_prepare_to_store (void) |
c906108c SS |
724 | { |
725 | /* Do nothing, since we can store individual regs */ | |
726 | } | |
727 | ||
d93bce06 KB |
728 | /* Transfer LEN bytes between GDB address MYADDR and target address |
729 | MEMADDR. If WRITE is non-zero, transfer them to the target, | |
730 | otherwise transfer them from the target. TARGET is unused. | |
731 | ||
732 | Returns the number of bytes transferred. */ | |
733 | ||
c906108c | 734 | static int |
8d7337bf | 735 | gdbsim_xfer_inferior_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, |
0a65a603 AC |
736 | int write, struct mem_attrib *attrib, |
737 | struct target_ops *target) | |
c906108c | 738 | { |
c5aa993b | 739 | if (!program_loaded) |
8a3fe4f8 | 740 | error (_("No program loaded.")); |
c906108c SS |
741 | |
742 | if (sr_get_debug ()) | |
743 | { | |
d4f3574e SS |
744 | /* FIXME: Send to something other than STDOUT? */ |
745 | printf_filtered ("gdbsim_xfer_inferior_memory: myaddr 0x"); | |
746 | gdb_print_host_address (myaddr, gdb_stdout); | |
747 | printf_filtered (", memaddr 0x%s, len %d, write %d\n", | |
748 | paddr_nz (memaddr), len, write); | |
c906108c | 749 | if (sr_get_debug () && write) |
c5aa993b | 750 | dump_mem (myaddr, len); |
c906108c SS |
751 | } |
752 | ||
753 | if (write) | |
754 | { | |
755 | len = sim_write (gdbsim_desc, memaddr, myaddr, len); | |
756 | } | |
c5aa993b | 757 | else |
c906108c SS |
758 | { |
759 | len = sim_read (gdbsim_desc, memaddr, myaddr, len); | |
760 | if (sr_get_debug () && len > 0) | |
c5aa993b JM |
761 | dump_mem (myaddr, len); |
762 | } | |
c906108c SS |
763 | return len; |
764 | } | |
765 | ||
766 | static void | |
fba45db2 | 767 | gdbsim_files_info (struct target_ops *target) |
c906108c SS |
768 | { |
769 | char *file = "nothing"; | |
770 | ||
771 | if (exec_bfd) | |
772 | file = bfd_get_filename (exec_bfd); | |
773 | ||
774 | if (sr_get_debug ()) | |
775 | printf_filtered ("gdbsim_files_info: file \"%s\"\n", file); | |
776 | ||
777 | if (exec_bfd) | |
778 | { | |
779 | printf_filtered ("\tAttached to %s running program %s\n", | |
780 | target_shortname, file); | |
781 | sim_info (gdbsim_desc, 0); | |
782 | } | |
783 | } | |
784 | ||
785 | /* Clear the simulator's notion of what the break points are. */ | |
786 | ||
787 | static void | |
fba45db2 | 788 | gdbsim_mourn_inferior (void) |
c5aa993b | 789 | { |
c906108c SS |
790 | if (sr_get_debug ()) |
791 | printf_filtered ("gdbsim_mourn_inferior:\n"); | |
792 | ||
793 | remove_breakpoints (); | |
794 | generic_mourn_inferior (); | |
795 | } | |
796 | ||
797 | static int | |
5a168c78 | 798 | gdbsim_insert_breakpoint (CORE_ADDR addr, bfd_byte *contents_cache) |
c906108c | 799 | { |
c906108c | 800 | return memory_insert_breakpoint (addr, contents_cache); |
c906108c SS |
801 | } |
802 | ||
803 | static int | |
5a168c78 | 804 | gdbsim_remove_breakpoint (CORE_ADDR addr, bfd_byte *contents_cache) |
c906108c | 805 | { |
c906108c | 806 | return memory_remove_breakpoint (addr, contents_cache); |
c906108c SS |
807 | } |
808 | ||
809 | /* Pass the command argument through to the simulator verbatim. The | |
810 | simulator must do any command interpretation work. */ | |
811 | ||
812 | void | |
fba45db2 | 813 | simulator_command (char *args, int from_tty) |
c906108c SS |
814 | { |
815 | if (gdbsim_desc == NULL) | |
816 | { | |
817 | ||
818 | /* PREVIOUSLY: The user may give a command before the simulator | |
819 | is opened. [...] (??? assuming of course one wishes to | |
820 | continue to allow commands to be sent to unopened simulators, | |
821 | which isn't entirely unreasonable). */ | |
822 | ||
823 | /* The simulator is a builtin abstraction of a remote target. | |
824 | Consistent with that model, access to the simulator, via sim | |
825 | commands, is restricted to the period when the channel to the | |
826 | simulator is open. */ | |
827 | ||
8a3fe4f8 | 828 | error (_("Not connected to the simulator target")); |
c906108c SS |
829 | } |
830 | ||
831 | sim_do_command (gdbsim_desc, args); | |
832 | ||
833 | /* Invalidate the register cache, in case the simulator command does | |
834 | something funny. */ | |
c5aa993b | 835 | registers_changed (); |
c906108c SS |
836 | } |
837 | ||
838 | /* Define the target subroutine names */ | |
839 | ||
c5aa993b JM |
840 | struct target_ops gdbsim_ops; |
841 | ||
842 | static void | |
843 | init_gdbsim_ops (void) | |
844 | { | |
845 | gdbsim_ops.to_shortname = "sim"; | |
846 | gdbsim_ops.to_longname = "simulator"; | |
847 | gdbsim_ops.to_doc = "Use the compiled-in simulator."; | |
848 | gdbsim_ops.to_open = gdbsim_open; | |
849 | gdbsim_ops.to_close = gdbsim_close; | |
c5aa993b | 850 | gdbsim_ops.to_detach = gdbsim_detach; |
c5aa993b JM |
851 | gdbsim_ops.to_resume = gdbsim_resume; |
852 | gdbsim_ops.to_wait = gdbsim_wait; | |
c5aa993b JM |
853 | gdbsim_ops.to_fetch_registers = gdbsim_fetch_register; |
854 | gdbsim_ops.to_store_registers = gdbsim_store_register; | |
855 | gdbsim_ops.to_prepare_to_store = gdbsim_prepare_to_store; | |
c8e73a31 | 856 | gdbsim_ops.deprecated_xfer_memory = gdbsim_xfer_inferior_memory; |
c5aa993b JM |
857 | gdbsim_ops.to_files_info = gdbsim_files_info; |
858 | gdbsim_ops.to_insert_breakpoint = gdbsim_insert_breakpoint; | |
859 | gdbsim_ops.to_remove_breakpoint = gdbsim_remove_breakpoint; | |
c5aa993b JM |
860 | gdbsim_ops.to_kill = gdbsim_kill; |
861 | gdbsim_ops.to_load = gdbsim_load; | |
c5aa993b | 862 | gdbsim_ops.to_create_inferior = gdbsim_create_inferior; |
c5aa993b | 863 | gdbsim_ops.to_mourn_inferior = gdbsim_mourn_inferior; |
c5aa993b | 864 | gdbsim_ops.to_stop = gdbsim_stop; |
c5aa993b | 865 | gdbsim_ops.to_stratum = process_stratum; |
c5aa993b JM |
866 | gdbsim_ops.to_has_all_memory = 1; |
867 | gdbsim_ops.to_has_memory = 1; | |
868 | gdbsim_ops.to_has_stack = 1; | |
869 | gdbsim_ops.to_has_registers = 1; | |
870 | gdbsim_ops.to_has_execution = 1; | |
c5aa993b | 871 | gdbsim_ops.to_magic = OPS_MAGIC; |
c906108c SS |
872 | |
873 | #ifdef TARGET_REDEFINE_DEFAULT_OPS | |
874 | TARGET_REDEFINE_DEFAULT_OPS (&gdbsim_ops); | |
875 | #endif | |
876 | } | |
877 | ||
878 | void | |
fba45db2 | 879 | _initialize_remote_sim (void) |
c906108c | 880 | { |
c5aa993b | 881 | init_gdbsim_ops (); |
c906108c SS |
882 | add_target (&gdbsim_ops); |
883 | ||
24ec834b | 884 | add_com ("sim", class_obscure, simulator_command, |
1bedd215 | 885 | _("Send a command to the simulator.")); |
c906108c | 886 | } |