Commit | Line | Data |
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c906108c | 1 | /* Generic remote debugging interface for simulators. |
d9fcf2fb | 2 | Copyright 1993, 1994, 1996, 1997, 2000 Free Software Foundation, Inc. |
c906108c SS |
3 | Contributed by Cygnus Support. |
4 | Steve Chamberlain (sac@cygnus.com). | |
5 | ||
c5aa993b | 6 | This file is part of GDB. |
c906108c | 7 | |
c5aa993b JM |
8 | This program is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
c906108c | 12 | |
c5aa993b JM |
13 | This program is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
c906108c | 17 | |
c5aa993b JM |
18 | You should have received a copy of the GNU General Public License |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 59 Temple Place - Suite 330, | |
21 | Boston, MA 02111-1307, USA. */ | |
c906108c SS |
22 | |
23 | #include "defs.h" | |
24 | #include "inferior.h" | |
03f2053f | 25 | #include "gdb_wait.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" | |
36 | #include "callback.h" | |
37 | #include "remote-sim.h" | |
38 | #include "remote-utils.h" | |
39 | #include "command.h" | |
40 | ||
41 | /* Prototypes */ | |
42 | ||
a14ed312 | 43 | extern void _initialize_remote_sim (void); |
392a587b | 44 | |
507f3c78 | 45 | extern int (*ui_loop_hook) (int signo); |
7a292a7a | 46 | |
a14ed312 | 47 | static void dump_mem (char *buf, int len); |
c906108c | 48 | |
a14ed312 | 49 | static void init_callbacks (void); |
c906108c | 50 | |
a14ed312 | 51 | static void end_callbacks (void); |
c906108c | 52 | |
a14ed312 | 53 | static int gdb_os_write_stdout (host_callback *, const char *, int); |
c906108c | 54 | |
a14ed312 | 55 | static void gdb_os_flush_stdout (host_callback *); |
c906108c | 56 | |
a14ed312 | 57 | static int gdb_os_write_stderr (host_callback *, const char *, int); |
c906108c | 58 | |
a14ed312 | 59 | static void gdb_os_flush_stderr (host_callback *); |
c906108c | 60 | |
a14ed312 | 61 | static int gdb_os_poll_quit (host_callback *); |
c906108c SS |
62 | |
63 | /* printf_filtered is depreciated */ | |
a14ed312 | 64 | static void gdb_os_printf_filtered (host_callback *, const char *, ...); |
c906108c | 65 | |
a14ed312 | 66 | static void gdb_os_vprintf_filtered (host_callback *, const char *, va_list); |
c906108c | 67 | |
a14ed312 | 68 | static void gdb_os_evprintf_filtered (host_callback *, const char *, va_list); |
c906108c | 69 | |
a14ed312 | 70 | static void gdb_os_error (host_callback *, const char *, ...); |
c906108c | 71 | |
a14ed312 | 72 | static void gdbsim_fetch_register (int regno); |
c906108c | 73 | |
a14ed312 | 74 | static void gdbsim_store_register (int regno); |
c906108c | 75 | |
a14ed312 | 76 | static void gdbsim_kill (void); |
c906108c | 77 | |
a14ed312 | 78 | static void gdbsim_load (char *prog, int fromtty); |
c906108c | 79 | |
a14ed312 | 80 | static void gdbsim_create_inferior (char *exec_file, char *args, char **env); |
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 | |
a14ed312 | 88 | static void gdbsim_resume (int pid, int step, enum target_signal siggnal); |
c906108c | 89 | |
a14ed312 | 90 | static int gdbsim_wait (int pid, struct target_waitstatus *status); |
c906108c | 91 | |
a14ed312 | 92 | static void gdbsim_prepare_to_store (void); |
c906108c | 93 | |
a14ed312 KB |
94 | static int gdbsim_xfer_inferior_memory (CORE_ADDR memaddr, |
95 | char *myaddr, int len, | |
96 | int write, struct target_ops *target); | |
c906108c | 97 | |
a14ed312 | 98 | static void gdbsim_files_info (struct target_ops *target); |
c906108c | 99 | |
a14ed312 | 100 | static void gdbsim_mourn_inferior (void); |
c906108c | 101 | |
a14ed312 | 102 | static void gdbsim_stop (void); |
c906108c | 103 | |
a14ed312 | 104 | void simulator_command (char *args, int from_tty); |
c906108c SS |
105 | |
106 | /* Naming convention: | |
107 | ||
108 | sim_* are the interface to the simulator (see remote-sim.h). | |
109 | gdbsim_* are stuff which is internal to gdb. */ | |
110 | ||
111 | /* Forward data declarations */ | |
112 | extern struct target_ops gdbsim_ops; | |
113 | ||
114 | static int program_loaded = 0; | |
115 | ||
116 | /* We must keep track of whether the simulator has been opened or not because | |
117 | GDB can call a target's close routine twice, but sim_close doesn't allow | |
118 | this. We also need to record the result of sim_open so we can pass it | |
119 | back to the other sim_foo routines. */ | |
120 | static SIM_DESC gdbsim_desc = 0; | |
121 | ||
122 | static void | |
123 | dump_mem (buf, len) | |
124 | char *buf; | |
125 | int len; | |
126 | { | |
127 | if (len <= 8) | |
128 | { | |
129 | if (len == 8 || len == 4) | |
130 | { | |
131 | long l[2]; | |
132 | memcpy (l, buf, len); | |
d4f3574e | 133 | printf_filtered ("\t0x%lx", l[0]); |
c906108c SS |
134 | printf_filtered (len == 8 ? " 0x%x\n" : "\n", l[1]); |
135 | } | |
136 | else | |
137 | { | |
138 | int i; | |
139 | printf_filtered ("\t"); | |
140 | for (i = 0; i < len; i++) | |
141 | printf_filtered ("0x%x ", buf[i]); | |
142 | printf_filtered ("\n"); | |
143 | } | |
144 | } | |
145 | } | |
146 | ||
147 | static host_callback gdb_callback; | |
148 | static int callbacks_initialized = 0; | |
149 | ||
150 | /* Initialize gdb_callback. */ | |
151 | ||
152 | static void | |
153 | init_callbacks () | |
154 | { | |
c5aa993b | 155 | if (!callbacks_initialized) |
c906108c SS |
156 | { |
157 | gdb_callback = default_callback; | |
158 | gdb_callback.init (&gdb_callback); | |
159 | gdb_callback.write_stdout = gdb_os_write_stdout; | |
160 | gdb_callback.flush_stdout = gdb_os_flush_stdout; | |
161 | gdb_callback.write_stderr = gdb_os_write_stderr; | |
162 | gdb_callback.flush_stderr = gdb_os_flush_stderr; | |
163 | gdb_callback.printf_filtered = gdb_os_printf_filtered; | |
164 | gdb_callback.vprintf_filtered = gdb_os_vprintf_filtered; | |
165 | gdb_callback.evprintf_filtered = gdb_os_evprintf_filtered; | |
166 | gdb_callback.error = gdb_os_error; | |
167 | gdb_callback.poll_quit = gdb_os_poll_quit; | |
168 | gdb_callback.magic = HOST_CALLBACK_MAGIC; | |
169 | callbacks_initialized = 1; | |
170 | } | |
171 | } | |
172 | ||
173 | /* Release callbacks (free resources used by them). */ | |
174 | ||
175 | static void | |
176 | end_callbacks () | |
177 | { | |
178 | if (callbacks_initialized) | |
179 | { | |
180 | gdb_callback.shutdown (&gdb_callback); | |
181 | callbacks_initialized = 0; | |
182 | } | |
183 | } | |
184 | ||
185 | /* GDB version of os_write_stdout callback. */ | |
186 | ||
c5aa993b | 187 | static int |
c906108c SS |
188 | gdb_os_write_stdout (p, buf, len) |
189 | host_callback *p; | |
190 | const char *buf; | |
191 | int len; | |
192 | { | |
193 | int i; | |
194 | char b[2]; | |
195 | ||
d9fcf2fb | 196 | ui_file_write (gdb_stdtarg, buf, len); |
c906108c SS |
197 | return len; |
198 | } | |
199 | ||
200 | /* GDB version of os_flush_stdout callback. */ | |
201 | ||
202 | static void | |
203 | gdb_os_flush_stdout (p) | |
204 | host_callback *p; | |
205 | { | |
4ce44c66 | 206 | gdb_flush (gdb_stdtarg); |
c906108c SS |
207 | } |
208 | ||
209 | /* GDB version of os_write_stderr callback. */ | |
210 | ||
c5aa993b | 211 | static int |
c906108c SS |
212 | gdb_os_write_stderr (p, buf, len) |
213 | host_callback *p; | |
214 | const char *buf; | |
215 | int len; | |
216 | { | |
217 | int i; | |
218 | char b[2]; | |
219 | ||
c5aa993b | 220 | for (i = 0; i < len; i++) |
c906108c SS |
221 | { |
222 | b[0] = buf[i]; | |
223 | b[1] = 0; | |
43ff13b4 | 224 | fputs_unfiltered (b, gdb_stdtarg); |
c906108c SS |
225 | } |
226 | return len; | |
227 | } | |
228 | ||
229 | /* GDB version of os_flush_stderr callback. */ | |
230 | ||
231 | static void | |
232 | gdb_os_flush_stderr (p) | |
233 | host_callback *p; | |
234 | { | |
235 | gdb_flush (gdb_stderr); | |
236 | } | |
237 | ||
238 | /* GDB version of printf_filtered callback. */ | |
239 | ||
c906108c | 240 | static void |
c5aa993b | 241 | gdb_os_printf_filtered (host_callback * p, const char *format,...) |
c906108c SS |
242 | { |
243 | va_list args; | |
c906108c | 244 | va_start (args, format); |
c906108c SS |
245 | |
246 | vfprintf_filtered (gdb_stdout, format, args); | |
247 | ||
248 | va_end (args); | |
249 | } | |
250 | ||
251 | /* GDB version of error vprintf_filtered. */ | |
252 | ||
c906108c | 253 | static void |
c5aa993b | 254 | gdb_os_vprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c SS |
255 | { |
256 | vfprintf_filtered (gdb_stdout, format, ap); | |
257 | } | |
258 | ||
259 | /* GDB version of error evprintf_filtered. */ | |
260 | ||
c906108c | 261 | static void |
c5aa993b | 262 | gdb_os_evprintf_filtered (host_callback * p, const char *format, va_list ap) |
c906108c SS |
263 | { |
264 | vfprintf_filtered (gdb_stderr, format, ap); | |
265 | } | |
266 | ||
267 | /* GDB version of error callback. */ | |
268 | ||
c906108c | 269 | static void |
c5aa993b | 270 | gdb_os_error (host_callback * p, const char *format,...) |
c906108c SS |
271 | { |
272 | if (error_hook) | |
273 | (*error_hook) (); | |
c5aa993b | 274 | else |
c906108c SS |
275 | { |
276 | va_list args; | |
c906108c | 277 | va_start (args, format); |
4ce44c66 | 278 | verror (format, args); |
c906108c | 279 | va_end (args); |
c906108c SS |
280 | } |
281 | } | |
282 | ||
d4f3574e SS |
283 | #ifndef REGISTER_SIM_REGNO |
284 | #define REGISTER_SIM_REGNO(N) (N) | |
285 | #endif | |
286 | ||
c906108c SS |
287 | static void |
288 | gdbsim_fetch_register (regno) | |
289 | int regno; | |
290 | { | |
291 | static int warn_user = 1; | |
c5aa993b | 292 | if (regno == -1) |
c906108c SS |
293 | { |
294 | for (regno = 0; regno < NUM_REGS; regno++) | |
295 | gdbsim_fetch_register (regno); | |
296 | } | |
d4f3574e SS |
297 | else if (REGISTER_NAME (regno) != NULL |
298 | && *REGISTER_NAME (regno) != '\0') | |
c906108c SS |
299 | { |
300 | char buf[MAX_REGISTER_RAW_SIZE]; | |
d4f3574e SS |
301 | int nr_bytes; |
302 | if (REGISTER_SIM_REGNO (regno) >= 0) | |
303 | nr_bytes = sim_fetch_register (gdbsim_desc, | |
304 | REGISTER_SIM_REGNO (regno), | |
305 | buf, REGISTER_RAW_SIZE (regno)); | |
306 | else | |
307 | nr_bytes = 0; | |
c906108c SS |
308 | if (nr_bytes == 0) |
309 | /* register not applicable, supply zero's */ | |
310 | memset (buf, 0, MAX_REGISTER_RAW_SIZE); | |
311 | else if (nr_bytes > 0 && nr_bytes != REGISTER_RAW_SIZE (regno) | |
312 | && warn_user) | |
313 | { | |
d4f3574e SS |
314 | fprintf_unfiltered (gdb_stderr, |
315 | "Size of register %s (%d/%d) incorrect (%d instead of %d))", | |
316 | REGISTER_NAME (regno), | |
317 | regno, REGISTER_SIM_REGNO (regno), | |
318 | nr_bytes, REGISTER_RAW_SIZE (regno)); | |
c906108c SS |
319 | warn_user = 0; |
320 | } | |
321 | supply_register (regno, buf); | |
322 | if (sr_get_debug ()) | |
323 | { | |
324 | printf_filtered ("gdbsim_fetch_register: %d", regno); | |
325 | /* FIXME: We could print something more intelligible. */ | |
326 | dump_mem (buf, REGISTER_RAW_SIZE (regno)); | |
327 | } | |
328 | } | |
329 | } | |
330 | ||
331 | ||
332 | static void | |
333 | gdbsim_store_register (regno) | |
334 | int regno; | |
335 | { | |
c5aa993b | 336 | if (regno == -1) |
c906108c SS |
337 | { |
338 | for (regno = 0; regno < NUM_REGS; regno++) | |
339 | gdbsim_store_register (regno); | |
340 | } | |
d4f3574e SS |
341 | else if (REGISTER_NAME (regno) != NULL |
342 | && *REGISTER_NAME (regno) != '\0' | |
343 | && REGISTER_SIM_REGNO (regno) >= 0) | |
c906108c SS |
344 | { |
345 | char tmp[MAX_REGISTER_RAW_SIZE]; | |
346 | int nr_bytes; | |
347 | read_register_gen (regno, tmp); | |
d4f3574e SS |
348 | nr_bytes = sim_store_register (gdbsim_desc, |
349 | REGISTER_SIM_REGNO (regno), | |
350 | tmp, REGISTER_RAW_SIZE (regno)); | |
c906108c | 351 | if (nr_bytes > 0 && nr_bytes != REGISTER_RAW_SIZE (regno)) |
96baa820 | 352 | internal_error ("Register size different to expected"); |
c906108c SS |
353 | if (sr_get_debug ()) |
354 | { | |
355 | printf_filtered ("gdbsim_store_register: %d", regno); | |
356 | /* FIXME: We could print something more intelligible. */ | |
357 | dump_mem (tmp, REGISTER_RAW_SIZE (regno)); | |
358 | } | |
359 | } | |
360 | } | |
361 | ||
362 | /* Kill the running program. This may involve closing any open files | |
363 | and releasing other resources acquired by the simulated program. */ | |
364 | ||
365 | static void | |
366 | gdbsim_kill () | |
367 | { | |
368 | if (sr_get_debug ()) | |
369 | printf_filtered ("gdbsim_kill\n"); | |
370 | ||
371 | /* There is no need to `kill' running simulator - the simulator is | |
372 | not running */ | |
373 | inferior_pid = 0; | |
374 | } | |
375 | ||
376 | /* Load an executable file into the target process. This is expected to | |
377 | not only bring new code into the target process, but also to update | |
378 | GDB's symbol tables to match. */ | |
379 | ||
380 | static void | |
381 | gdbsim_load (prog, fromtty) | |
382 | char *prog; | |
383 | int fromtty; | |
384 | { | |
385 | if (sr_get_debug ()) | |
386 | printf_filtered ("gdbsim_load: prog \"%s\"\n", prog); | |
387 | ||
388 | inferior_pid = 0; | |
389 | ||
390 | /* FIXME: We will print two messages on error. | |
391 | Need error to either not print anything if passed NULL or need | |
392 | another routine that doesn't take any arguments. */ | |
393 | if (sim_load (gdbsim_desc, prog, NULL, fromtty) == SIM_RC_FAIL) | |
394 | error ("unable to load program"); | |
395 | ||
396 | /* FIXME: If a load command should reset the targets registers then | |
397 | a call to sim_create_inferior() should go here. */ | |
398 | ||
399 | program_loaded = 1; | |
400 | } | |
401 | ||
402 | ||
403 | /* Start an inferior process and set inferior_pid to its pid. | |
404 | EXEC_FILE is the file to run. | |
405 | ARGS is a string containing the arguments to the program. | |
406 | ENV is the environment vector to pass. Errors reported with error(). | |
407 | On VxWorks and various standalone systems, we ignore exec_file. */ | |
408 | /* This is called not only when we first attach, but also when the | |
409 | user types "run" after having attached. */ | |
410 | ||
411 | static void | |
412 | gdbsim_create_inferior (exec_file, args, env) | |
413 | char *exec_file; | |
414 | char *args; | |
415 | char **env; | |
416 | { | |
417 | int len; | |
c5aa993b | 418 | char *arg_buf, **argv; |
c906108c SS |
419 | |
420 | if (exec_file == 0 || exec_bfd == 0) | |
421 | warning ("No executable file specified."); | |
c5aa993b | 422 | if (!program_loaded) |
c906108c SS |
423 | warning ("No program loaded."); |
424 | ||
425 | if (sr_get_debug ()) | |
426 | printf_filtered ("gdbsim_create_inferior: exec_file \"%s\", args \"%s\"\n", | |
c5aa993b | 427 | (exec_file ? exec_file : "(NULL)"), |
c906108c SS |
428 | args); |
429 | ||
c5aa993b | 430 | gdbsim_kill (); |
c906108c SS |
431 | remove_breakpoints (); |
432 | init_wait_for_inferior (); | |
433 | ||
434 | if (exec_file != NULL) | |
435 | { | |
c5aa993b | 436 | len = strlen (exec_file) + 1 + strlen (args) + 1 + /*slop */ 10; |
c906108c SS |
437 | arg_buf = (char *) alloca (len); |
438 | arg_buf[0] = '\0'; | |
439 | strcat (arg_buf, exec_file); | |
440 | strcat (arg_buf, " "); | |
441 | strcat (arg_buf, args); | |
442 | argv = buildargv (arg_buf); | |
7a292a7a | 443 | make_cleanup_freeargv (argv); |
c906108c SS |
444 | } |
445 | else | |
446 | argv = NULL; | |
447 | sim_create_inferior (gdbsim_desc, exec_bfd, argv, env); | |
448 | ||
449 | inferior_pid = 42; | |
c5aa993b | 450 | insert_breakpoints (); /* Needed to get correct instruction in cache */ |
c906108c SS |
451 | |
452 | clear_proceed_status (); | |
453 | ||
454 | /* NB: Entry point already set by sim_create_inferior. */ | |
2acceee2 | 455 | proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 0); |
c906108c SS |
456 | } |
457 | ||
458 | /* The open routine takes the rest of the parameters from the command, | |
459 | and (if successful) pushes a new target onto the stack. | |
460 | Targets should supply this routine, if only to provide an error message. */ | |
461 | /* Called when selecting the simulator. EG: (gdb) target sim name. */ | |
462 | ||
463 | static void | |
464 | gdbsim_open (args, from_tty) | |
465 | char *args; | |
466 | int from_tty; | |
467 | { | |
468 | int len; | |
469 | char *arg_buf; | |
470 | char **argv; | |
471 | ||
472 | if (sr_get_debug ()) | |
473 | printf_filtered ("gdbsim_open: args \"%s\"\n", args ? args : "(null)"); | |
474 | ||
475 | /* Remove current simulator if one exists. Only do this if the simulator | |
476 | has been opened because sim_close requires it. | |
477 | This is important because the call to push_target below will cause | |
478 | sim_close to be called if the simulator is already open, but push_target | |
479 | is called after sim_open! We can't move the call to push_target before | |
480 | the call to sim_open because sim_open may invoke `error'. */ | |
481 | if (gdbsim_desc != NULL) | |
482 | unpush_target (&gdbsim_ops); | |
483 | ||
c5aa993b | 484 | len = (7 + 1 /* gdbsim */ |
c906108c SS |
485 | + strlen (" -E little") |
486 | + strlen (" --architecture=xxxxxxxxxx") | |
487 | + (args ? strlen (args) : 0) | |
c5aa993b | 488 | + 50) /* slack */ ; |
c906108c | 489 | arg_buf = (char *) alloca (len); |
c5aa993b | 490 | strcpy (arg_buf, "gdbsim"); /* 7 */ |
c906108c SS |
491 | /* Specify the byte order for the target when it is both selectable |
492 | and explicitly specified by the user (not auto detected). */ | |
493 | if (TARGET_BYTE_ORDER_SELECTABLE_P | |
494 | && !TARGET_BYTE_ORDER_AUTO) | |
495 | { | |
496 | switch (TARGET_BYTE_ORDER) | |
497 | { | |
498 | case BIG_ENDIAN: | |
499 | strcat (arg_buf, " -E big"); | |
500 | break; | |
501 | case LITTLE_ENDIAN: | |
502 | strcat (arg_buf, " -E little"); | |
503 | break; | |
504 | default: | |
96baa820 | 505 | internal_error ("Value of TARGET_BYTE_ORDER unknown"); |
c906108c SS |
506 | } |
507 | } | |
508 | /* Specify the architecture of the target when it has been | |
509 | explicitly specified */ | |
510 | if (!TARGET_ARCHITECTURE_AUTO) | |
511 | { | |
512 | strcat (arg_buf, " --architecture="); | |
513 | strcat (arg_buf, TARGET_ARCHITECTURE->printable_name); | |
514 | } | |
515 | /* finally, any explicit args */ | |
516 | if (args) | |
517 | { | |
c5aa993b | 518 | strcat (arg_buf, " "); /* 1 */ |
c906108c SS |
519 | strcat (arg_buf, args); |
520 | } | |
521 | argv = buildargv (arg_buf); | |
522 | if (argv == NULL) | |
523 | error ("Insufficient memory available to allocate simulator arg list."); | |
7a292a7a | 524 | make_cleanup_freeargv (argv); |
c906108c SS |
525 | |
526 | init_callbacks (); | |
527 | gdbsim_desc = sim_open (SIM_OPEN_DEBUG, &gdb_callback, exec_bfd, argv); | |
528 | ||
529 | if (gdbsim_desc == 0) | |
530 | error ("unable to create simulator instance"); | |
531 | ||
532 | push_target (&gdbsim_ops); | |
533 | target_fetch_registers (-1); | |
534 | printf_filtered ("Connected to the simulator.\n"); | |
535 | } | |
536 | ||
537 | /* Does whatever cleanup is required for a target that we are no longer | |
538 | going to be calling. Argument says whether we are quitting gdb and | |
539 | should not get hung in case of errors, or whether we want a clean | |
540 | termination even if it takes a while. This routine is automatically | |
541 | always called just before a routine is popped off the target stack. | |
542 | Closing file descriptors and freeing memory are typical things it should | |
543 | do. */ | |
544 | /* Close out all files and local state before this target loses control. */ | |
545 | ||
546 | static void | |
547 | gdbsim_close (quitting) | |
548 | int quitting; | |
549 | { | |
550 | if (sr_get_debug ()) | |
551 | printf_filtered ("gdbsim_close: quitting %d\n", quitting); | |
552 | ||
553 | program_loaded = 0; | |
554 | ||
555 | if (gdbsim_desc != NULL) | |
556 | { | |
557 | sim_close (gdbsim_desc, quitting); | |
558 | gdbsim_desc = NULL; | |
559 | } | |
560 | ||
561 | end_callbacks (); | |
75660bc0 | 562 | generic_mourn_inferior (); |
c906108c SS |
563 | } |
564 | ||
565 | /* Takes a program previously attached to and detaches it. | |
566 | The program may resume execution (some targets do, some don't) and will | |
567 | no longer stop on signals, etc. We better not have left any breakpoints | |
568 | in the program or it'll die when it hits one. ARGS is arguments | |
569 | typed by the user (e.g. a signal to send the process). FROM_TTY | |
570 | says whether to be verbose or not. */ | |
571 | /* Terminate the open connection to the remote debugger. | |
572 | Use this when you want to detach and do something else with your gdb. */ | |
573 | ||
574 | static void | |
c5aa993b | 575 | gdbsim_detach (args, from_tty) |
c906108c SS |
576 | char *args; |
577 | int from_tty; | |
578 | { | |
579 | if (sr_get_debug ()) | |
580 | printf_filtered ("gdbsim_detach: args \"%s\"\n", args); | |
581 | ||
582 | pop_target (); /* calls gdbsim_close to do the real work */ | |
583 | if (from_tty) | |
584 | printf_filtered ("Ending simulator %s debugging\n", target_shortname); | |
585 | } | |
c5aa993b | 586 | |
c906108c SS |
587 | /* Resume execution of the target process. STEP says whether to single-step |
588 | or to run free; SIGGNAL is the signal value (e.g. SIGINT) to be given | |
589 | to the target, or zero for no signal. */ | |
590 | ||
591 | static enum target_signal resume_siggnal; | |
592 | static int resume_step; | |
593 | ||
594 | static void | |
595 | gdbsim_resume (pid, step, siggnal) | |
596 | int pid, step; | |
597 | enum target_signal siggnal; | |
598 | { | |
599 | if (inferior_pid != 42) | |
600 | error ("The program is not being run."); | |
601 | ||
602 | if (sr_get_debug ()) | |
603 | printf_filtered ("gdbsim_resume: step %d, signal %d\n", step, siggnal); | |
604 | ||
605 | resume_siggnal = siggnal; | |
606 | resume_step = step; | |
607 | } | |
608 | ||
609 | /* Notify the simulator of an asynchronous request to stop. | |
c5aa993b | 610 | |
c906108c SS |
611 | The simulator shall ensure that the stop request is eventually |
612 | delivered to the simulator. If the call is made while the | |
613 | simulator is not running then the stop request is processed when | |
614 | the simulator is next resumed. | |
615 | ||
616 | For simulators that do not support this operation, just abort */ | |
617 | ||
618 | static void | |
619 | gdbsim_stop () | |
620 | { | |
c5aa993b | 621 | if (!sim_stop (gdbsim_desc)) |
c906108c SS |
622 | { |
623 | quit (); | |
624 | } | |
625 | } | |
626 | ||
627 | /* GDB version of os_poll_quit callback. | |
628 | Taken from gdb/util.c - should be in a library */ | |
629 | ||
630 | static int | |
631 | gdb_os_poll_quit (p) | |
632 | host_callback *p; | |
633 | { | |
7a292a7a SS |
634 | if (ui_loop_hook != NULL) |
635 | ui_loop_hook (0); | |
636 | ||
c906108c | 637 | notice_quit (); |
c5aa993b | 638 | if (quit_flag) /* gdb's idea of quit */ |
c906108c | 639 | { |
c5aa993b | 640 | quit_flag = 0; /* we've stolen it */ |
c906108c SS |
641 | return 1; |
642 | } | |
643 | else if (immediate_quit) | |
644 | { | |
645 | return 1; | |
646 | } | |
647 | return 0; | |
648 | } | |
649 | ||
650 | /* Wait for inferior process to do something. Return pid of child, | |
651 | or -1 in case of error; store status through argument pointer STATUS, | |
652 | just as `wait' would. */ | |
653 | ||
654 | static void | |
655 | gdbsim_cntrl_c (signo) | |
656 | int signo; | |
657 | { | |
658 | gdbsim_stop (); | |
659 | } | |
660 | ||
661 | static int | |
662 | gdbsim_wait (pid, status) | |
663 | int pid; | |
664 | struct target_waitstatus *status; | |
665 | { | |
666 | static RETSIGTYPE (*prev_sigint) (); | |
667 | int sigrc = 0; | |
668 | enum sim_stop reason = sim_running; | |
669 | ||
670 | if (sr_get_debug ()) | |
671 | printf_filtered ("gdbsim_wait\n"); | |
672 | ||
673 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) | |
674 | { | |
675 | struct sigaction sa, osa; | |
676 | sa.sa_handler = gdbsim_cntrl_c; | |
677 | sigemptyset (&sa.sa_mask); | |
678 | sa.sa_flags = 0; | |
679 | sigaction (SIGINT, &sa, &osa); | |
680 | prev_sigint = osa.sa_handler; | |
681 | } | |
682 | #else | |
683 | prev_sigint = signal (SIGINT, gdbsim_cntrl_c); | |
684 | #endif | |
685 | sim_resume (gdbsim_desc, resume_step, | |
686 | target_signal_to_host (resume_siggnal)); | |
687 | signal (SIGINT, prev_sigint); | |
688 | resume_step = 0; | |
689 | ||
690 | sim_stop_reason (gdbsim_desc, &reason, &sigrc); | |
691 | ||
692 | switch (reason) | |
693 | { | |
694 | case sim_exited: | |
695 | status->kind = TARGET_WAITKIND_EXITED; | |
696 | status->value.integer = sigrc; | |
697 | break; | |
698 | case sim_stopped: | |
699 | switch (sigrc) | |
700 | { | |
701 | case SIGABRT: | |
702 | quit (); | |
703 | break; | |
704 | case SIGINT: | |
705 | case SIGTRAP: | |
706 | default: | |
707 | status->kind = TARGET_WAITKIND_STOPPED; | |
708 | /* The signal in sigrc is a host signal. That probably | |
709 | should be fixed. */ | |
710 | status->value.sig = target_signal_from_host (sigrc); | |
711 | break; | |
712 | } | |
713 | break; | |
714 | case sim_signalled: | |
715 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
716 | /* The signal in sigrc is a host signal. That probably | |
c5aa993b | 717 | should be fixed. */ |
c906108c SS |
718 | status->value.sig = target_signal_from_host (sigrc); |
719 | break; | |
720 | case sim_running: | |
721 | case sim_polling: | |
722 | /* FIXME: Is this correct? */ | |
723 | break; | |
724 | } | |
725 | ||
726 | return inferior_pid; | |
727 | } | |
728 | ||
729 | /* Get ready to modify the registers array. On machines which store | |
730 | individual registers, this doesn't need to do anything. On machines | |
731 | which store all the registers in one fell swoop, this makes sure | |
732 | that registers contains all the registers from the program being | |
733 | debugged. */ | |
734 | ||
735 | static void | |
736 | gdbsim_prepare_to_store () | |
737 | { | |
738 | /* Do nothing, since we can store individual regs */ | |
739 | } | |
740 | ||
741 | static int | |
742 | gdbsim_xfer_inferior_memory (memaddr, myaddr, len, write, target) | |
743 | CORE_ADDR memaddr; | |
744 | char *myaddr; | |
745 | int len; | |
746 | int write; | |
c5aa993b | 747 | struct target_ops *target; /* ignored */ |
c906108c | 748 | { |
c5aa993b | 749 | if (!program_loaded) |
c906108c SS |
750 | error ("No program loaded."); |
751 | ||
752 | if (sr_get_debug ()) | |
753 | { | |
d4f3574e SS |
754 | /* FIXME: Send to something other than STDOUT? */ |
755 | printf_filtered ("gdbsim_xfer_inferior_memory: myaddr 0x"); | |
756 | gdb_print_host_address (myaddr, gdb_stdout); | |
757 | printf_filtered (", memaddr 0x%s, len %d, write %d\n", | |
758 | paddr_nz (memaddr), len, write); | |
c906108c | 759 | if (sr_get_debug () && write) |
c5aa993b | 760 | dump_mem (myaddr, len); |
c906108c SS |
761 | } |
762 | ||
763 | if (write) | |
764 | { | |
765 | len = sim_write (gdbsim_desc, memaddr, myaddr, len); | |
766 | } | |
c5aa993b | 767 | else |
c906108c SS |
768 | { |
769 | len = sim_read (gdbsim_desc, memaddr, myaddr, len); | |
770 | if (sr_get_debug () && len > 0) | |
c5aa993b JM |
771 | dump_mem (myaddr, len); |
772 | } | |
c906108c SS |
773 | return len; |
774 | } | |
775 | ||
776 | static void | |
777 | gdbsim_files_info (target) | |
778 | struct target_ops *target; | |
779 | { | |
780 | char *file = "nothing"; | |
781 | ||
782 | if (exec_bfd) | |
783 | file = bfd_get_filename (exec_bfd); | |
784 | ||
785 | if (sr_get_debug ()) | |
786 | printf_filtered ("gdbsim_files_info: file \"%s\"\n", file); | |
787 | ||
788 | if (exec_bfd) | |
789 | { | |
790 | printf_filtered ("\tAttached to %s running program %s\n", | |
791 | target_shortname, file); | |
792 | sim_info (gdbsim_desc, 0); | |
793 | } | |
794 | } | |
795 | ||
796 | /* Clear the simulator's notion of what the break points are. */ | |
797 | ||
798 | static void | |
c5aa993b JM |
799 | gdbsim_mourn_inferior () |
800 | { | |
c906108c SS |
801 | if (sr_get_debug ()) |
802 | printf_filtered ("gdbsim_mourn_inferior:\n"); | |
803 | ||
804 | remove_breakpoints (); | |
805 | generic_mourn_inferior (); | |
806 | } | |
807 | ||
808 | static int | |
809 | gdbsim_insert_breakpoint (addr, contents_cache) | |
810 | CORE_ADDR addr; | |
811 | char *contents_cache; | |
812 | { | |
813 | #ifdef SIM_HAS_BREAKPOINTS | |
814 | SIM_RC retcode; | |
815 | ||
816 | retcode = sim_set_breakpoint (gdbsim_desc, addr); | |
817 | ||
818 | switch (retcode) | |
819 | { | |
820 | case SIM_RC_OK: | |
821 | return 0; | |
822 | case SIM_RC_INSUFFICIENT_RESOURCES: | |
823 | return ENOMEM; | |
824 | default: | |
825 | return EIO; | |
826 | } | |
827 | #else | |
828 | return memory_insert_breakpoint (addr, contents_cache); | |
829 | #endif | |
830 | } | |
831 | ||
832 | static int | |
833 | gdbsim_remove_breakpoint (addr, contents_cache) | |
834 | CORE_ADDR addr; | |
835 | char *contents_cache; | |
836 | { | |
837 | #ifdef SIM_HAS_BREAKPOINTS | |
838 | SIM_RC retcode; | |
839 | ||
840 | retcode = sim_clear_breakpoint (gdbsim_desc, addr); | |
841 | ||
842 | switch (retcode) | |
843 | { | |
844 | case SIM_RC_OK: | |
845 | case SIM_RC_UNKNOWN_BREAKPOINT: | |
846 | return 0; | |
847 | case SIM_RC_INSUFFICIENT_RESOURCES: | |
848 | return ENOMEM; | |
849 | default: | |
850 | return EIO; | |
851 | } | |
852 | #else | |
853 | return memory_remove_breakpoint (addr, contents_cache); | |
854 | #endif | |
855 | } | |
856 | ||
857 | /* Pass the command argument through to the simulator verbatim. The | |
858 | simulator must do any command interpretation work. */ | |
859 | ||
860 | void | |
861 | simulator_command (args, from_tty) | |
862 | char *args; | |
863 | int from_tty; | |
864 | { | |
865 | if (gdbsim_desc == NULL) | |
866 | { | |
867 | ||
868 | /* PREVIOUSLY: The user may give a command before the simulator | |
869 | is opened. [...] (??? assuming of course one wishes to | |
870 | continue to allow commands to be sent to unopened simulators, | |
871 | which isn't entirely unreasonable). */ | |
872 | ||
873 | /* The simulator is a builtin abstraction of a remote target. | |
874 | Consistent with that model, access to the simulator, via sim | |
875 | commands, is restricted to the period when the channel to the | |
876 | simulator is open. */ | |
877 | ||
878 | error ("Not connected to the simulator target"); | |
879 | } | |
880 | ||
881 | sim_do_command (gdbsim_desc, args); | |
882 | ||
883 | /* Invalidate the register cache, in case the simulator command does | |
884 | something funny. */ | |
c5aa993b | 885 | registers_changed (); |
c906108c SS |
886 | } |
887 | ||
888 | /* Define the target subroutine names */ | |
889 | ||
c5aa993b JM |
890 | struct target_ops gdbsim_ops; |
891 | ||
892 | static void | |
893 | init_gdbsim_ops (void) | |
894 | { | |
895 | gdbsim_ops.to_shortname = "sim"; | |
896 | gdbsim_ops.to_longname = "simulator"; | |
897 | gdbsim_ops.to_doc = "Use the compiled-in simulator."; | |
898 | gdbsim_ops.to_open = gdbsim_open; | |
899 | gdbsim_ops.to_close = gdbsim_close; | |
900 | gdbsim_ops.to_attach = NULL; | |
901 | gdbsim_ops.to_post_attach = NULL; | |
902 | gdbsim_ops.to_require_attach = NULL; | |
903 | gdbsim_ops.to_detach = gdbsim_detach; | |
904 | gdbsim_ops.to_require_detach = NULL; | |
905 | gdbsim_ops.to_resume = gdbsim_resume; | |
906 | gdbsim_ops.to_wait = gdbsim_wait; | |
907 | gdbsim_ops.to_post_wait = NULL; | |
908 | gdbsim_ops.to_fetch_registers = gdbsim_fetch_register; | |
909 | gdbsim_ops.to_store_registers = gdbsim_store_register; | |
910 | gdbsim_ops.to_prepare_to_store = gdbsim_prepare_to_store; | |
911 | gdbsim_ops.to_xfer_memory = gdbsim_xfer_inferior_memory; | |
912 | gdbsim_ops.to_files_info = gdbsim_files_info; | |
913 | gdbsim_ops.to_insert_breakpoint = gdbsim_insert_breakpoint; | |
914 | gdbsim_ops.to_remove_breakpoint = gdbsim_remove_breakpoint; | |
915 | gdbsim_ops.to_terminal_init = NULL; | |
916 | gdbsim_ops.to_terminal_inferior = NULL; | |
917 | gdbsim_ops.to_terminal_ours_for_output = NULL; | |
918 | gdbsim_ops.to_terminal_ours = NULL; | |
919 | gdbsim_ops.to_terminal_info = NULL; | |
920 | gdbsim_ops.to_kill = gdbsim_kill; | |
921 | gdbsim_ops.to_load = gdbsim_load; | |
922 | gdbsim_ops.to_lookup_symbol = NULL; | |
923 | gdbsim_ops.to_create_inferior = gdbsim_create_inferior; | |
c906108c SS |
924 | gdbsim_ops.to_post_startup_inferior = NULL; |
925 | gdbsim_ops.to_acknowledge_created_inferior = NULL; | |
926 | gdbsim_ops.to_clone_and_follow_inferior = NULL; | |
927 | gdbsim_ops.to_post_follow_inferior_by_clone = NULL; | |
928 | gdbsim_ops.to_insert_fork_catchpoint = NULL; | |
929 | gdbsim_ops.to_remove_fork_catchpoint = NULL; | |
930 | gdbsim_ops.to_insert_vfork_catchpoint = NULL; | |
931 | gdbsim_ops.to_remove_vfork_catchpoint = NULL; | |
932 | gdbsim_ops.to_has_forked = NULL; | |
933 | gdbsim_ops.to_has_vforked = NULL; | |
934 | gdbsim_ops.to_can_follow_vfork_prior_to_exec = NULL; | |
935 | gdbsim_ops.to_post_follow_vfork = NULL; | |
936 | gdbsim_ops.to_insert_exec_catchpoint = NULL; | |
937 | gdbsim_ops.to_remove_exec_catchpoint = NULL; | |
938 | gdbsim_ops.to_has_execd = NULL; | |
939 | gdbsim_ops.to_reported_exec_events_per_exec_call = NULL; | |
940 | gdbsim_ops.to_has_exited = NULL; | |
c5aa993b JM |
941 | gdbsim_ops.to_mourn_inferior = gdbsim_mourn_inferior; |
942 | gdbsim_ops.to_can_run = 0; | |
943 | gdbsim_ops.to_notice_signals = 0; | |
944 | gdbsim_ops.to_thread_alive = 0; | |
945 | gdbsim_ops.to_stop = gdbsim_stop; | |
946 | gdbsim_ops.to_pid_to_exec_file = NULL; | |
947 | gdbsim_ops.to_core_file_to_sym_file = NULL; | |
948 | gdbsim_ops.to_stratum = process_stratum; | |
949 | gdbsim_ops.DONT_USE = NULL; | |
950 | gdbsim_ops.to_has_all_memory = 1; | |
951 | gdbsim_ops.to_has_memory = 1; | |
952 | gdbsim_ops.to_has_stack = 1; | |
953 | gdbsim_ops.to_has_registers = 1; | |
954 | gdbsim_ops.to_has_execution = 1; | |
955 | gdbsim_ops.to_sections = NULL; | |
956 | gdbsim_ops.to_sections_end = NULL; | |
957 | gdbsim_ops.to_magic = OPS_MAGIC; | |
c906108c SS |
958 | |
959 | #ifdef TARGET_REDEFINE_DEFAULT_OPS | |
960 | TARGET_REDEFINE_DEFAULT_OPS (&gdbsim_ops); | |
961 | #endif | |
962 | } | |
963 | ||
964 | void | |
965 | _initialize_remote_sim () | |
966 | { | |
c5aa993b | 967 | init_gdbsim_ops (); |
c906108c SS |
968 | add_target (&gdbsim_ops); |
969 | ||
970 | add_com ("sim <command>", class_obscure, simulator_command, | |
c5aa993b | 971 | "Send a command to the simulator."); |
c906108c | 972 | } |