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, |
281b533b | 4 | 2002, 2004, 2005, 2006 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" |
1986bccd | 46 | #include "readline/readline.h" |
c906108c SS |
47 | |
48 | /* Prototypes */ | |
49 | ||
a14ed312 | 50 | extern void _initialize_remote_sim (void); |
392a587b | 51 | |
a14ed312 | 52 | static void dump_mem (char *buf, int len); |
c906108c | 53 | |
a14ed312 | 54 | static void init_callbacks (void); |
c906108c | 55 | |
a14ed312 | 56 | static void end_callbacks (void); |
c906108c | 57 | |
a14ed312 | 58 | static int gdb_os_write_stdout (host_callback *, const char *, int); |
c906108c | 59 | |
a14ed312 | 60 | static void gdb_os_flush_stdout (host_callback *); |
c906108c | 61 | |
a14ed312 | 62 | static int gdb_os_write_stderr (host_callback *, const char *, int); |
c906108c | 63 | |
a14ed312 | 64 | static void gdb_os_flush_stderr (host_callback *); |
c906108c | 65 | |
a14ed312 | 66 | static int gdb_os_poll_quit (host_callback *); |
c906108c SS |
67 | |
68 | /* printf_filtered is depreciated */ | |
a14ed312 | 69 | static void gdb_os_printf_filtered (host_callback *, const char *, ...); |
c906108c | 70 | |
a14ed312 | 71 | static void gdb_os_vprintf_filtered (host_callback *, const char *, va_list); |
c906108c | 72 | |
a14ed312 | 73 | static void gdb_os_evprintf_filtered (host_callback *, const char *, va_list); |
c906108c | 74 | |
a14ed312 | 75 | static void gdb_os_error (host_callback *, const char *, ...); |
c906108c | 76 | |
a14ed312 | 77 | static void gdbsim_fetch_register (int regno); |
c906108c | 78 | |
a14ed312 | 79 | static void gdbsim_store_register (int regno); |
c906108c | 80 | |
a14ed312 | 81 | static void gdbsim_kill (void); |
c906108c | 82 | |
a14ed312 | 83 | static void gdbsim_load (char *prog, int fromtty); |
c906108c | 84 | |
a14ed312 | 85 | static void gdbsim_open (char *args, int from_tty); |
c906108c | 86 | |
a14ed312 | 87 | static void gdbsim_close (int quitting); |
c906108c | 88 | |
a14ed312 | 89 | static void gdbsim_detach (char *args, int from_tty); |
c906108c | 90 | |
39f77062 | 91 | static void gdbsim_resume (ptid_t ptid, int step, enum target_signal siggnal); |
c906108c | 92 | |
39f77062 | 93 | static ptid_t gdbsim_wait (ptid_t ptid, struct target_waitstatus *status); |
c906108c | 94 | |
a14ed312 | 95 | static void gdbsim_prepare_to_store (void); |
c906108c | 96 | |
a14ed312 | 97 | static void gdbsim_files_info (struct target_ops *target); |
c906108c | 98 | |
a14ed312 | 99 | static void gdbsim_mourn_inferior (void); |
c906108c | 100 | |
a14ed312 | 101 | static void gdbsim_stop (void); |
c906108c | 102 | |
a14ed312 | 103 | void simulator_command (char *args, int from_tty); |
c906108c SS |
104 | |
105 | /* Naming convention: | |
106 | ||
107 | sim_* are the interface to the simulator (see remote-sim.h). | |
108 | gdbsim_* are stuff which is internal to gdb. */ | |
109 | ||
110 | /* Forward data declarations */ | |
111 | extern struct target_ops gdbsim_ops; | |
112 | ||
113 | static int program_loaded = 0; | |
114 | ||
115 | /* We must keep track of whether the simulator has been opened or not because | |
116 | GDB can call a target's close routine twice, but sim_close doesn't allow | |
117 | this. We also need to record the result of sim_open so we can pass it | |
118 | back to the other sim_foo routines. */ | |
119 | static SIM_DESC gdbsim_desc = 0; | |
120 | ||
121 | static void | |
fba45db2 | 122 | dump_mem (char *buf, int len) |
c906108c SS |
123 | { |
124 | if (len <= 8) | |
125 | { | |
126 | if (len == 8 || len == 4) | |
127 | { | |
128 | long l[2]; | |
129 | memcpy (l, buf, len); | |
d4f3574e | 130 | printf_filtered ("\t0x%lx", l[0]); |
a6da1910 AC |
131 | if (len == 8) |
132 | printf_filtered (" 0x%lx", l[1]); | |
133 | printf_filtered ("\n"); | |
c906108c SS |
134 | } |
135 | else | |
136 | { | |
137 | int i; | |
138 | printf_filtered ("\t"); | |
139 | for (i = 0; i < len; i++) | |
140 | printf_filtered ("0x%x ", buf[i]); | |
141 | printf_filtered ("\n"); | |
142 | } | |
143 | } | |
144 | } | |
145 | ||
146 | static host_callback gdb_callback; | |
147 | static int callbacks_initialized = 0; | |
148 | ||
149 | /* Initialize gdb_callback. */ | |
150 | ||
151 | static void | |
fba45db2 | 152 | init_callbacks (void) |
c906108c | 153 | { |
c5aa993b | 154 | if (!callbacks_initialized) |
c906108c SS |
155 | { |
156 | gdb_callback = default_callback; | |
157 | gdb_callback.init (&gdb_callback); | |
158 | gdb_callback.write_stdout = gdb_os_write_stdout; | |
159 | gdb_callback.flush_stdout = gdb_os_flush_stdout; | |
160 | gdb_callback.write_stderr = gdb_os_write_stderr; | |
161 | gdb_callback.flush_stderr = gdb_os_flush_stderr; | |
162 | gdb_callback.printf_filtered = gdb_os_printf_filtered; | |
163 | gdb_callback.vprintf_filtered = gdb_os_vprintf_filtered; | |
164 | gdb_callback.evprintf_filtered = gdb_os_evprintf_filtered; | |
165 | gdb_callback.error = gdb_os_error; | |
166 | gdb_callback.poll_quit = gdb_os_poll_quit; | |
167 | gdb_callback.magic = HOST_CALLBACK_MAGIC; | |
168 | callbacks_initialized = 1; | |
169 | } | |
170 | } | |
171 | ||
172 | /* Release callbacks (free resources used by them). */ | |
173 | ||
174 | static void | |
fba45db2 | 175 | end_callbacks (void) |
c906108c SS |
176 | { |
177 | if (callbacks_initialized) | |
178 | { | |
179 | gdb_callback.shutdown (&gdb_callback); | |
180 | callbacks_initialized = 0; | |
181 | } | |
182 | } | |
183 | ||
184 | /* GDB version of os_write_stdout callback. */ | |
185 | ||
c5aa993b | 186 | static int |
fba45db2 | 187 | gdb_os_write_stdout (host_callback *p, const char *buf, int len) |
c906108c SS |
188 | { |
189 | int i; | |
190 | char b[2]; | |
191 | ||
d9fcf2fb | 192 | ui_file_write (gdb_stdtarg, buf, len); |
c906108c SS |
193 | return len; |
194 | } | |
195 | ||
196 | /* GDB version of os_flush_stdout callback. */ | |
197 | ||
198 | static void | |
fba45db2 | 199 | gdb_os_flush_stdout (host_callback *p) |
c906108c | 200 | { |
4ce44c66 | 201 | gdb_flush (gdb_stdtarg); |
c906108c SS |
202 | } |
203 | ||
204 | /* GDB version of os_write_stderr callback. */ | |
205 | ||
c5aa993b | 206 | static int |
fba45db2 | 207 | gdb_os_write_stderr (host_callback *p, const char *buf, int len) |
c906108c SS |
208 | { |
209 | int i; | |
210 | char b[2]; | |
211 | ||
c5aa993b | 212 | for (i = 0; i < len; i++) |
c906108c SS |
213 | { |
214 | b[0] = buf[i]; | |
215 | b[1] = 0; | |
22e8e3c7 | 216 | fputs_unfiltered (b, gdb_stdtargerr); |
c906108c SS |
217 | } |
218 | return len; | |
219 | } | |
220 | ||
221 | /* GDB version of os_flush_stderr callback. */ | |
222 | ||
223 | static void | |
fba45db2 | 224 | gdb_os_flush_stderr (host_callback *p) |
c906108c | 225 | { |
22e8e3c7 | 226 | gdb_flush (gdb_stdtargerr); |
c906108c SS |
227 | } |
228 | ||
229 | /* GDB version of printf_filtered callback. */ | |
230 | ||
c906108c | 231 | static void |
c5aa993b | 232 | gdb_os_printf_filtered (host_callback * p, const char *format,...) |
c906108c SS |
233 | { |
234 | va_list args; | |
c906108c | 235 | va_start (args, format); |
c906108c SS |
236 | |
237 | vfprintf_filtered (gdb_stdout, format, args); | |
238 | ||
239 | va_end (args); | |
240 | } | |
241 | ||
242 | /* GDB version of error vprintf_filtered. */ | |
243 | ||
c906108c | 244 | static void |
c5aa993b | 245 | gdb_os_vprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c SS |
246 | { |
247 | vfprintf_filtered (gdb_stdout, format, ap); | |
248 | } | |
249 | ||
250 | /* GDB version of error evprintf_filtered. */ | |
251 | ||
c906108c | 252 | static void |
c5aa993b | 253 | gdb_os_evprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c SS |
254 | { |
255 | vfprintf_filtered (gdb_stderr, format, ap); | |
256 | } | |
257 | ||
258 | /* GDB version of error callback. */ | |
259 | ||
c906108c | 260 | static void |
c5aa993b | 261 | gdb_os_error (host_callback * p, const char *format,...) |
c906108c | 262 | { |
9a4105ab AC |
263 | if (deprecated_error_hook) |
264 | (*deprecated_error_hook) (); | |
c5aa993b | 265 | else |
c906108c SS |
266 | { |
267 | va_list args; | |
c906108c | 268 | va_start (args, format); |
4ce44c66 | 269 | verror (format, args); |
c906108c | 270 | va_end (args); |
c906108c SS |
271 | } |
272 | } | |
273 | ||
8238d0bf AC |
274 | int |
275 | one2one_register_sim_regno (int regnum) | |
276 | { | |
277 | /* Only makes sense to supply raw registers. */ | |
278 | gdb_assert (regnum >= 0 && regnum < NUM_REGS); | |
279 | return regnum; | |
280 | } | |
281 | ||
c906108c | 282 | static void |
fba45db2 | 283 | gdbsim_fetch_register (int regno) |
c906108c | 284 | { |
c5aa993b | 285 | if (regno == -1) |
c906108c SS |
286 | { |
287 | for (regno = 0; regno < NUM_REGS; regno++) | |
288 | gdbsim_fetch_register (regno); | |
8238d0bf | 289 | return; |
c906108c | 290 | } |
8238d0bf AC |
291 | |
292 | switch (REGISTER_SIM_REGNO (regno)) | |
c906108c | 293 | { |
8238d0bf AC |
294 | case LEGACY_SIM_REGNO_IGNORE: |
295 | break; | |
296 | case SIM_REGNO_DOES_NOT_EXIST: | |
297 | { | |
298 | /* For moment treat a `does not exist' register the same way | |
299 | as an ``unavailable'' register. */ | |
d9d9c31f | 300 | char buf[MAX_REGISTER_SIZE]; |
8238d0bf | 301 | int nr_bytes; |
d9d9c31f | 302 | memset (buf, 0, MAX_REGISTER_SIZE); |
23a6d369 | 303 | regcache_raw_supply (current_regcache, regno, buf); |
8238d0bf AC |
304 | set_register_cached (regno, -1); |
305 | break; | |
306 | } | |
307 | default: | |
308 | { | |
309 | static int warn_user = 1; | |
d9d9c31f | 310 | char buf[MAX_REGISTER_SIZE]; |
8238d0bf AC |
311 | int nr_bytes; |
312 | gdb_assert (regno >= 0 && regno < NUM_REGS); | |
d9d9c31f | 313 | memset (buf, 0, MAX_REGISTER_SIZE); |
d4f3574e SS |
314 | nr_bytes = sim_fetch_register (gdbsim_desc, |
315 | REGISTER_SIM_REGNO (regno), | |
3acba339 AC |
316 | buf, register_size (current_gdbarch, regno)); |
317 | if (nr_bytes > 0 && nr_bytes != register_size (current_gdbarch, regno) && warn_user) | |
8238d0bf AC |
318 | { |
319 | fprintf_unfiltered (gdb_stderr, | |
320 | "Size of register %s (%d/%d) incorrect (%d instead of %d))", | |
321 | REGISTER_NAME (regno), | |
322 | regno, REGISTER_SIM_REGNO (regno), | |
3acba339 | 323 | nr_bytes, register_size (current_gdbarch, regno)); |
8238d0bf AC |
324 | warn_user = 0; |
325 | } | |
326 | /* FIXME: cagney/2002-05-27: Should check `nr_bytes == 0' | |
278a7cf7 | 327 | indicating that GDB and the SIM have different ideas about |
8238d0bf AC |
328 | which registers are fetchable. */ |
329 | /* Else if (nr_bytes < 0): an old simulator, that doesn't | |
330 | think to return the register size. Just assume all is ok. */ | |
23a6d369 | 331 | regcache_raw_supply (current_regcache, regno, buf); |
8238d0bf AC |
332 | if (sr_get_debug ()) |
333 | { | |
334 | printf_filtered ("gdbsim_fetch_register: %d", regno); | |
335 | /* FIXME: We could print something more intelligible. */ | |
3acba339 | 336 | dump_mem (buf, register_size (current_gdbarch, regno)); |
8238d0bf AC |
337 | } |
338 | break; | |
339 | } | |
c906108c SS |
340 | } |
341 | } | |
342 | ||
343 | ||
344 | static void | |
fba45db2 | 345 | gdbsim_store_register (int regno) |
c906108c | 346 | { |
c5aa993b | 347 | if (regno == -1) |
c906108c SS |
348 | { |
349 | for (regno = 0; regno < NUM_REGS; regno++) | |
350 | gdbsim_store_register (regno); | |
8238d0bf | 351 | return; |
c906108c | 352 | } |
8238d0bf | 353 | else if (REGISTER_SIM_REGNO (regno) >= 0) |
c906108c | 354 | { |
123a958e | 355 | char tmp[MAX_REGISTER_SIZE]; |
c906108c | 356 | int nr_bytes; |
4caf0990 | 357 | deprecated_read_register_gen (regno, tmp); |
d4f3574e SS |
358 | nr_bytes = sim_store_register (gdbsim_desc, |
359 | REGISTER_SIM_REGNO (regno), | |
3acba339 AC |
360 | tmp, register_size (current_gdbarch, regno)); |
361 | if (nr_bytes > 0 && nr_bytes != register_size (current_gdbarch, regno)) | |
8e65ff28 | 362 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 363 | _("Register size different to expected")); |
8238d0bf | 364 | /* FIXME: cagney/2002-05-27: Should check `nr_bytes == 0' |
278a7cf7 | 365 | indicating that GDB and the SIM have different ideas about |
8238d0bf | 366 | which registers are fetchable. */ |
c906108c SS |
367 | if (sr_get_debug ()) |
368 | { | |
369 | printf_filtered ("gdbsim_store_register: %d", regno); | |
370 | /* FIXME: We could print something more intelligible. */ | |
3acba339 | 371 | dump_mem (tmp, register_size (current_gdbarch, regno)); |
c906108c SS |
372 | } |
373 | } | |
374 | } | |
375 | ||
376 | /* Kill the running program. This may involve closing any open files | |
377 | and releasing other resources acquired by the simulated program. */ | |
378 | ||
379 | static void | |
fba45db2 | 380 | gdbsim_kill (void) |
c906108c SS |
381 | { |
382 | if (sr_get_debug ()) | |
383 | printf_filtered ("gdbsim_kill\n"); | |
384 | ||
385 | /* There is no need to `kill' running simulator - the simulator is | |
52bb452f DJ |
386 | not running. Mourning it is enough. */ |
387 | target_mourn_inferior (); | |
c906108c SS |
388 | } |
389 | ||
390 | /* Load an executable file into the target process. This is expected to | |
391 | not only bring new code into the target process, but also to update | |
392 | GDB's symbol tables to match. */ | |
393 | ||
394 | static void | |
1986bccd | 395 | gdbsim_load (char *args, int fromtty) |
c906108c | 396 | { |
1986bccd AS |
397 | char **argv = buildargv (args); |
398 | char *prog; | |
399 | ||
400 | if (argv == NULL) | |
401 | nomem (0); | |
402 | ||
403 | make_cleanup_freeargv (argv); | |
404 | ||
405 | prog = tilde_expand (argv[0]); | |
406 | ||
407 | if (argv[1] != NULL) | |
408 | error (_("GDB sim does not yet support a load offset.")); | |
409 | ||
c906108c SS |
410 | if (sr_get_debug ()) |
411 | printf_filtered ("gdbsim_load: prog \"%s\"\n", prog); | |
412 | ||
c906108c SS |
413 | /* FIXME: We will print two messages on error. |
414 | Need error to either not print anything if passed NULL or need | |
415 | another routine that doesn't take any arguments. */ | |
416 | if (sim_load (gdbsim_desc, prog, NULL, fromtty) == SIM_RC_FAIL) | |
8a3fe4f8 | 417 | error (_("unable to load program")); |
c906108c SS |
418 | |
419 | /* FIXME: If a load command should reset the targets registers then | |
420 | a call to sim_create_inferior() should go here. */ | |
421 | ||
422 | program_loaded = 1; | |
423 | } | |
424 | ||
425 | ||
39f77062 | 426 | /* Start an inferior process and set inferior_ptid to its pid. |
c906108c SS |
427 | EXEC_FILE is the file to run. |
428 | ARGS is a string containing the arguments to the program. | |
429 | ENV is the environment vector to pass. Errors reported with error(). | |
430 | On VxWorks and various standalone systems, we ignore exec_file. */ | |
431 | /* This is called not only when we first attach, but also when the | |
432 | user types "run" after having attached. */ | |
433 | ||
434 | static void | |
c27cda74 | 435 | gdbsim_create_inferior (char *exec_file, char *args, char **env, int from_tty) |
c906108c SS |
436 | { |
437 | int len; | |
c5aa993b | 438 | char *arg_buf, **argv; |
c906108c SS |
439 | |
440 | if (exec_file == 0 || exec_bfd == 0) | |
8a3fe4f8 | 441 | warning (_("No executable file specified.")); |
c5aa993b | 442 | if (!program_loaded) |
8a3fe4f8 | 443 | warning (_("No program loaded.")); |
c906108c SS |
444 | |
445 | if (sr_get_debug ()) | |
446 | printf_filtered ("gdbsim_create_inferior: exec_file \"%s\", args \"%s\"\n", | |
c5aa993b | 447 | (exec_file ? exec_file : "(NULL)"), |
c906108c SS |
448 | args); |
449 | ||
c5aa993b | 450 | gdbsim_kill (); |
c906108c SS |
451 | remove_breakpoints (); |
452 | init_wait_for_inferior (); | |
453 | ||
454 | if (exec_file != NULL) | |
455 | { | |
c5aa993b | 456 | len = strlen (exec_file) + 1 + strlen (args) + 1 + /*slop */ 10; |
c906108c SS |
457 | arg_buf = (char *) alloca (len); |
458 | arg_buf[0] = '\0'; | |
459 | strcat (arg_buf, exec_file); | |
460 | strcat (arg_buf, " "); | |
461 | strcat (arg_buf, args); | |
462 | argv = buildargv (arg_buf); | |
7a292a7a | 463 | make_cleanup_freeargv (argv); |
c906108c SS |
464 | } |
465 | else | |
466 | argv = NULL; | |
467 | sim_create_inferior (gdbsim_desc, exec_bfd, argv, env); | |
468 | ||
39f77062 | 469 | inferior_ptid = pid_to_ptid (42); |
52bb452f | 470 | target_mark_running (&gdbsim_ops); |
c5aa993b | 471 | insert_breakpoints (); /* Needed to get correct instruction in cache */ |
c906108c SS |
472 | |
473 | clear_proceed_status (); | |
c906108c SS |
474 | } |
475 | ||
476 | /* The open routine takes the rest of the parameters from the command, | |
477 | and (if successful) pushes a new target onto the stack. | |
478 | Targets should supply this routine, if only to provide an error message. */ | |
479 | /* Called when selecting the simulator. EG: (gdb) target sim name. */ | |
480 | ||
481 | static void | |
fba45db2 | 482 | gdbsim_open (char *args, int from_tty) |
c906108c SS |
483 | { |
484 | int len; | |
485 | char *arg_buf; | |
486 | char **argv; | |
487 | ||
488 | if (sr_get_debug ()) | |
489 | printf_filtered ("gdbsim_open: args \"%s\"\n", args ? args : "(null)"); | |
490 | ||
491 | /* Remove current simulator if one exists. Only do this if the simulator | |
492 | has been opened because sim_close requires it. | |
493 | This is important because the call to push_target below will cause | |
494 | sim_close to be called if the simulator is already open, but push_target | |
495 | is called after sim_open! We can't move the call to push_target before | |
496 | the call to sim_open because sim_open may invoke `error'. */ | |
497 | if (gdbsim_desc != NULL) | |
498 | unpush_target (&gdbsim_ops); | |
499 | ||
c5aa993b | 500 | len = (7 + 1 /* gdbsim */ |
c906108c SS |
501 | + strlen (" -E little") |
502 | + strlen (" --architecture=xxxxxxxxxx") | |
503 | + (args ? strlen (args) : 0) | |
c5aa993b | 504 | + 50) /* slack */ ; |
c906108c | 505 | arg_buf = (char *) alloca (len); |
c5aa993b | 506 | strcpy (arg_buf, "gdbsim"); /* 7 */ |
c906108c SS |
507 | /* Specify the byte order for the target when it is both selectable |
508 | and explicitly specified by the user (not auto detected). */ | |
a8cf2722 | 509 | switch (selected_byte_order ()) |
c906108c | 510 | { |
a8cf2722 AC |
511 | case BFD_ENDIAN_BIG: |
512 | strcat (arg_buf, " -E big"); | |
513 | break; | |
514 | case BFD_ENDIAN_LITTLE: | |
515 | strcat (arg_buf, " -E little"); | |
516 | break; | |
517 | case BFD_ENDIAN_UNKNOWN: | |
518 | break; | |
c906108c SS |
519 | } |
520 | /* Specify the architecture of the target when it has been | |
521 | explicitly specified */ | |
a8cf2722 | 522 | if (selected_architecture_name () != NULL) |
c906108c SS |
523 | { |
524 | strcat (arg_buf, " --architecture="); | |
a8cf2722 | 525 | strcat (arg_buf, selected_architecture_name ()); |
c906108c SS |
526 | } |
527 | /* finally, any explicit args */ | |
528 | if (args) | |
529 | { | |
c5aa993b | 530 | strcat (arg_buf, " "); /* 1 */ |
c906108c SS |
531 | strcat (arg_buf, args); |
532 | } | |
533 | argv = buildargv (arg_buf); | |
534 | if (argv == NULL) | |
8a3fe4f8 | 535 | error (_("Insufficient memory available to allocate simulator arg list.")); |
7a292a7a | 536 | make_cleanup_freeargv (argv); |
c906108c SS |
537 | |
538 | init_callbacks (); | |
539 | gdbsim_desc = sim_open (SIM_OPEN_DEBUG, &gdb_callback, exec_bfd, argv); | |
540 | ||
541 | if (gdbsim_desc == 0) | |
8a3fe4f8 | 542 | error (_("unable to create simulator instance")); |
c906108c SS |
543 | |
544 | push_target (&gdbsim_ops); | |
c906108c | 545 | printf_filtered ("Connected to the simulator.\n"); |
52bb452f DJ |
546 | |
547 | /* There's nothing running after "target sim" or "load"; not until | |
548 | "run". */ | |
549 | inferior_ptid = null_ptid; | |
550 | target_mark_exited (&gdbsim_ops); | |
c906108c SS |
551 | } |
552 | ||
553 | /* Does whatever cleanup is required for a target that we are no longer | |
554 | going to be calling. Argument says whether we are quitting gdb and | |
555 | should not get hung in case of errors, or whether we want a clean | |
556 | termination even if it takes a while. This routine is automatically | |
557 | always called just before a routine is popped off the target stack. | |
558 | Closing file descriptors and freeing memory are typical things it should | |
559 | do. */ | |
560 | /* Close out all files and local state before this target loses control. */ | |
561 | ||
562 | static void | |
fba45db2 | 563 | gdbsim_close (int quitting) |
c906108c SS |
564 | { |
565 | if (sr_get_debug ()) | |
566 | printf_filtered ("gdbsim_close: quitting %d\n", quitting); | |
567 | ||
568 | program_loaded = 0; | |
569 | ||
570 | if (gdbsim_desc != NULL) | |
571 | { | |
572 | sim_close (gdbsim_desc, quitting); | |
573 | gdbsim_desc = NULL; | |
574 | } | |
575 | ||
576 | end_callbacks (); | |
75660bc0 | 577 | generic_mourn_inferior (); |
c906108c SS |
578 | } |
579 | ||
580 | /* Takes a program previously attached to and detaches it. | |
581 | The program may resume execution (some targets do, some don't) and will | |
582 | no longer stop on signals, etc. We better not have left any breakpoints | |
583 | in the program or it'll die when it hits one. ARGS is arguments | |
584 | typed by the user (e.g. a signal to send the process). FROM_TTY | |
585 | says whether to be verbose or not. */ | |
586 | /* Terminate the open connection to the remote debugger. | |
587 | Use this when you want to detach and do something else with your gdb. */ | |
588 | ||
589 | static void | |
fba45db2 | 590 | gdbsim_detach (char *args, int from_tty) |
c906108c SS |
591 | { |
592 | if (sr_get_debug ()) | |
593 | printf_filtered ("gdbsim_detach: args \"%s\"\n", args); | |
594 | ||
595 | pop_target (); /* calls gdbsim_close to do the real work */ | |
596 | if (from_tty) | |
597 | printf_filtered ("Ending simulator %s debugging\n", target_shortname); | |
598 | } | |
c5aa993b | 599 | |
c906108c SS |
600 | /* Resume execution of the target process. STEP says whether to single-step |
601 | or to run free; SIGGNAL is the signal value (e.g. SIGINT) to be given | |
602 | to the target, or zero for no signal. */ | |
603 | ||
604 | static enum target_signal resume_siggnal; | |
605 | static int resume_step; | |
606 | ||
607 | static void | |
39f77062 | 608 | gdbsim_resume (ptid_t ptid, int step, enum target_signal siggnal) |
c906108c | 609 | { |
39f77062 | 610 | if (PIDGET (inferior_ptid) != 42) |
8a3fe4f8 | 611 | error (_("The program is not being run.")); |
c906108c SS |
612 | |
613 | if (sr_get_debug ()) | |
614 | printf_filtered ("gdbsim_resume: step %d, signal %d\n", step, siggnal); | |
615 | ||
616 | resume_siggnal = siggnal; | |
617 | resume_step = step; | |
618 | } | |
619 | ||
620 | /* Notify the simulator of an asynchronous request to stop. | |
c5aa993b | 621 | |
c906108c SS |
622 | The simulator shall ensure that the stop request is eventually |
623 | delivered to the simulator. If the call is made while the | |
624 | simulator is not running then the stop request is processed when | |
625 | the simulator is next resumed. | |
626 | ||
627 | For simulators that do not support this operation, just abort */ | |
628 | ||
629 | static void | |
fba45db2 | 630 | gdbsim_stop (void) |
c906108c | 631 | { |
c5aa993b | 632 | if (!sim_stop (gdbsim_desc)) |
c906108c SS |
633 | { |
634 | quit (); | |
635 | } | |
636 | } | |
637 | ||
638 | /* GDB version of os_poll_quit callback. | |
8a0ce09a | 639 | Taken from gdb/util.c - should be in a library. */ |
c906108c SS |
640 | |
641 | static int | |
fba45db2 | 642 | gdb_os_poll_quit (host_callback *p) |
c906108c | 643 | { |
98bbd631 AC |
644 | if (deprecated_ui_loop_hook != NULL) |
645 | deprecated_ui_loop_hook (0); | |
7a292a7a | 646 | |
c5aa993b | 647 | if (quit_flag) /* gdb's idea of quit */ |
c906108c | 648 | { |
c5aa993b | 649 | quit_flag = 0; /* we've stolen it */ |
c906108c SS |
650 | return 1; |
651 | } | |
652 | else if (immediate_quit) | |
653 | { | |
654 | return 1; | |
655 | } | |
656 | return 0; | |
657 | } | |
658 | ||
659 | /* Wait for inferior process to do something. Return pid of child, | |
660 | or -1 in case of error; store status through argument pointer STATUS, | |
661 | just as `wait' would. */ | |
662 | ||
663 | static void | |
fba45db2 | 664 | gdbsim_cntrl_c (int signo) |
c906108c SS |
665 | { |
666 | gdbsim_stop (); | |
667 | } | |
668 | ||
39f77062 KB |
669 | static ptid_t |
670 | gdbsim_wait (ptid_t ptid, struct target_waitstatus *status) | |
c906108c SS |
671 | { |
672 | static RETSIGTYPE (*prev_sigint) (); | |
673 | int sigrc = 0; | |
674 | enum sim_stop reason = sim_running; | |
675 | ||
676 | if (sr_get_debug ()) | |
677 | printf_filtered ("gdbsim_wait\n"); | |
678 | ||
679 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) | |
680 | { | |
681 | struct sigaction sa, osa; | |
682 | sa.sa_handler = gdbsim_cntrl_c; | |
683 | sigemptyset (&sa.sa_mask); | |
684 | sa.sa_flags = 0; | |
685 | sigaction (SIGINT, &sa, &osa); | |
686 | prev_sigint = osa.sa_handler; | |
687 | } | |
688 | #else | |
689 | prev_sigint = signal (SIGINT, gdbsim_cntrl_c); | |
690 | #endif | |
aba6488e | 691 | sim_resume (gdbsim_desc, resume_step, resume_siggnal); |
c906108c SS |
692 | signal (SIGINT, prev_sigint); |
693 | resume_step = 0; | |
694 | ||
695 | sim_stop_reason (gdbsim_desc, &reason, &sigrc); | |
696 | ||
697 | switch (reason) | |
698 | { | |
699 | case sim_exited: | |
700 | status->kind = TARGET_WAITKIND_EXITED; | |
701 | status->value.integer = sigrc; | |
702 | break; | |
703 | case sim_stopped: | |
704 | switch (sigrc) | |
705 | { | |
aba6488e | 706 | case TARGET_SIGNAL_ABRT: |
c906108c SS |
707 | quit (); |
708 | break; | |
aba6488e MM |
709 | case TARGET_SIGNAL_INT: |
710 | case TARGET_SIGNAL_TRAP: | |
c906108c SS |
711 | default: |
712 | status->kind = TARGET_WAITKIND_STOPPED; | |
aba6488e | 713 | status->value.sig = sigrc; |
c906108c SS |
714 | break; |
715 | } | |
716 | break; | |
717 | case sim_signalled: | |
718 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
aba6488e | 719 | status->value.sig = sigrc; |
c906108c SS |
720 | break; |
721 | case sim_running: | |
722 | case sim_polling: | |
723 | /* FIXME: Is this correct? */ | |
724 | break; | |
725 | } | |
726 | ||
39f77062 | 727 | return inferior_ptid; |
c906108c SS |
728 | } |
729 | ||
730 | /* Get ready to modify the registers array. On machines which store | |
731 | individual registers, this doesn't need to do anything. On machines | |
732 | which store all the registers in one fell swoop, this makes sure | |
733 | that registers contains all the registers from the program being | |
734 | debugged. */ | |
735 | ||
736 | static void | |
fba45db2 | 737 | gdbsim_prepare_to_store (void) |
c906108c SS |
738 | { |
739 | /* Do nothing, since we can store individual regs */ | |
740 | } | |
741 | ||
d93bce06 KB |
742 | /* Transfer LEN bytes between GDB address MYADDR and target address |
743 | MEMADDR. If WRITE is non-zero, transfer them to the target, | |
744 | otherwise transfer them from the target. TARGET is unused. | |
745 | ||
746 | Returns the number of bytes transferred. */ | |
747 | ||
c906108c | 748 | static int |
8d7337bf | 749 | gdbsim_xfer_inferior_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, |
0a65a603 AC |
750 | int write, struct mem_attrib *attrib, |
751 | struct target_ops *target) | |
c906108c | 752 | { |
52bb452f DJ |
753 | /* If no program is running yet, then ignore the simulator for |
754 | memory. Pass the request down to the next target, hopefully | |
755 | an exec file. */ | |
756 | if (!target_has_execution) | |
757 | return 0; | |
758 | ||
c5aa993b | 759 | if (!program_loaded) |
8a3fe4f8 | 760 | error (_("No program loaded.")); |
c906108c SS |
761 | |
762 | if (sr_get_debug ()) | |
763 | { | |
d4f3574e SS |
764 | /* FIXME: Send to something other than STDOUT? */ |
765 | printf_filtered ("gdbsim_xfer_inferior_memory: myaddr 0x"); | |
766 | gdb_print_host_address (myaddr, gdb_stdout); | |
767 | printf_filtered (", memaddr 0x%s, len %d, write %d\n", | |
768 | paddr_nz (memaddr), len, write); | |
c906108c | 769 | if (sr_get_debug () && write) |
c5aa993b | 770 | dump_mem (myaddr, len); |
c906108c SS |
771 | } |
772 | ||
773 | if (write) | |
774 | { | |
775 | len = sim_write (gdbsim_desc, memaddr, myaddr, len); | |
776 | } | |
c5aa993b | 777 | else |
c906108c SS |
778 | { |
779 | len = sim_read (gdbsim_desc, memaddr, myaddr, len); | |
780 | if (sr_get_debug () && len > 0) | |
c5aa993b JM |
781 | dump_mem (myaddr, len); |
782 | } | |
c906108c SS |
783 | return len; |
784 | } | |
785 | ||
786 | static void | |
fba45db2 | 787 | gdbsim_files_info (struct target_ops *target) |
c906108c SS |
788 | { |
789 | char *file = "nothing"; | |
790 | ||
791 | if (exec_bfd) | |
792 | file = bfd_get_filename (exec_bfd); | |
793 | ||
794 | if (sr_get_debug ()) | |
795 | printf_filtered ("gdbsim_files_info: file \"%s\"\n", file); | |
796 | ||
797 | if (exec_bfd) | |
798 | { | |
799 | printf_filtered ("\tAttached to %s running program %s\n", | |
800 | target_shortname, file); | |
801 | sim_info (gdbsim_desc, 0); | |
802 | } | |
803 | } | |
804 | ||
805 | /* Clear the simulator's notion of what the break points are. */ | |
806 | ||
807 | static void | |
fba45db2 | 808 | gdbsim_mourn_inferior (void) |
c5aa993b | 809 | { |
c906108c SS |
810 | if (sr_get_debug ()) |
811 | printf_filtered ("gdbsim_mourn_inferior:\n"); | |
812 | ||
813 | remove_breakpoints (); | |
52bb452f | 814 | target_mark_exited (&gdbsim_ops); |
c906108c SS |
815 | generic_mourn_inferior (); |
816 | } | |
817 | ||
c906108c SS |
818 | /* Pass the command argument through to the simulator verbatim. The |
819 | simulator must do any command interpretation work. */ | |
820 | ||
821 | void | |
fba45db2 | 822 | simulator_command (char *args, int from_tty) |
c906108c SS |
823 | { |
824 | if (gdbsim_desc == NULL) | |
825 | { | |
826 | ||
827 | /* PREVIOUSLY: The user may give a command before the simulator | |
828 | is opened. [...] (??? assuming of course one wishes to | |
829 | continue to allow commands to be sent to unopened simulators, | |
830 | which isn't entirely unreasonable). */ | |
831 | ||
832 | /* The simulator is a builtin abstraction of a remote target. | |
833 | Consistent with that model, access to the simulator, via sim | |
834 | commands, is restricted to the period when the channel to the | |
835 | simulator is open. */ | |
836 | ||
8a3fe4f8 | 837 | error (_("Not connected to the simulator target")); |
c906108c SS |
838 | } |
839 | ||
840 | sim_do_command (gdbsim_desc, args); | |
841 | ||
842 | /* Invalidate the register cache, in case the simulator command does | |
843 | something funny. */ | |
c5aa993b | 844 | registers_changed (); |
c906108c SS |
845 | } |
846 | ||
847 | /* Define the target subroutine names */ | |
848 | ||
c5aa993b JM |
849 | struct target_ops gdbsim_ops; |
850 | ||
851 | static void | |
852 | init_gdbsim_ops (void) | |
853 | { | |
854 | gdbsim_ops.to_shortname = "sim"; | |
855 | gdbsim_ops.to_longname = "simulator"; | |
856 | gdbsim_ops.to_doc = "Use the compiled-in simulator."; | |
857 | gdbsim_ops.to_open = gdbsim_open; | |
858 | gdbsim_ops.to_close = gdbsim_close; | |
c5aa993b | 859 | gdbsim_ops.to_detach = gdbsim_detach; |
c5aa993b JM |
860 | gdbsim_ops.to_resume = gdbsim_resume; |
861 | gdbsim_ops.to_wait = gdbsim_wait; | |
c5aa993b JM |
862 | gdbsim_ops.to_fetch_registers = gdbsim_fetch_register; |
863 | gdbsim_ops.to_store_registers = gdbsim_store_register; | |
864 | gdbsim_ops.to_prepare_to_store = gdbsim_prepare_to_store; | |
c8e73a31 | 865 | gdbsim_ops.deprecated_xfer_memory = gdbsim_xfer_inferior_memory; |
c5aa993b | 866 | gdbsim_ops.to_files_info = gdbsim_files_info; |
8181d85f DJ |
867 | gdbsim_ops.to_insert_breakpoint = memory_insert_breakpoint; |
868 | gdbsim_ops.to_remove_breakpoint = memory_remove_breakpoint; | |
c5aa993b JM |
869 | gdbsim_ops.to_kill = gdbsim_kill; |
870 | gdbsim_ops.to_load = gdbsim_load; | |
c5aa993b | 871 | gdbsim_ops.to_create_inferior = gdbsim_create_inferior; |
c5aa993b | 872 | gdbsim_ops.to_mourn_inferior = gdbsim_mourn_inferior; |
c5aa993b | 873 | gdbsim_ops.to_stop = gdbsim_stop; |
c5aa993b | 874 | gdbsim_ops.to_stratum = process_stratum; |
c5aa993b JM |
875 | gdbsim_ops.to_has_all_memory = 1; |
876 | gdbsim_ops.to_has_memory = 1; | |
877 | gdbsim_ops.to_has_stack = 1; | |
878 | gdbsim_ops.to_has_registers = 1; | |
879 | gdbsim_ops.to_has_execution = 1; | |
c5aa993b | 880 | gdbsim_ops.to_magic = OPS_MAGIC; |
c906108c SS |
881 | |
882 | #ifdef TARGET_REDEFINE_DEFAULT_OPS | |
883 | TARGET_REDEFINE_DEFAULT_OPS (&gdbsim_ops); | |
884 | #endif | |
885 | } | |
886 | ||
887 | void | |
fba45db2 | 888 | _initialize_remote_sim (void) |
c906108c | 889 | { |
c5aa993b | 890 | init_gdbsim_ops (); |
c906108c SS |
891 | add_target (&gdbsim_ops); |
892 | ||
24ec834b | 893 | add_com ("sim", class_obscure, simulator_command, |
1bedd215 | 894 | _("Send a command to the simulator.")); |
c906108c | 895 | } |