Commit | Line | Data |
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40b92220 | 1 | /* Generic remote debugging interface for simulators. |
286f83b4 | 2 | Copyright 1993, 1994, 1996, 1997 Free Software Foundation, Inc. |
40b92220 | 3 | Contributed by Cygnus Support. |
47424e79 | 4 | Steve Chamberlain (sac@cygnus.com). |
ec25d19b SC |
5 | |
6 | This file is part of GDB. | |
7 | ||
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. | |
12 | ||
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. | |
17 | ||
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 | |
6c9638b4 | 20 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
ec25d19b SC |
21 | |
22 | #include "defs.h" | |
23 | #include "inferior.h" | |
24 | #include "wait.h" | |
25 | #include "value.h" | |
2b576293 | 26 | #include "gdb_string.h" |
ec25d19b SC |
27 | #include <ctype.h> |
28 | #include <fcntl.h> | |
29 | #include <signal.h> | |
30 | #include <setjmp.h> | |
31 | #include <errno.h> | |
32 | #include "terminal.h" | |
33 | #include "target.h" | |
34 | #include "gdbcore.h" | |
4da8b2a5 | 35 | #include "callback.h" |
59c2be48 | 36 | #include "remote-sim.h" |
f1e7bafc | 37 | #include "remote-utils.h" |
40b92220 | 38 | |
8501c742 SG |
39 | /* Prototypes */ |
40 | ||
41 | static void dump_mem PARAMS ((char *buf, int len)); | |
42 | ||
4da8b2a5 DE |
43 | static void init_callbacks PARAMS ((void)); |
44 | ||
45 | static void end_callbacks PARAMS ((void)); | |
46 | ||
47 | static int gdb_os_write_stdout PARAMS ((host_callback *, const char *, int)); | |
48 | ||
48ae8057 AC |
49 | static void gdb_os_flush_stdout PARAMS ((host_callback *)); |
50 | ||
51 | static int gdb_os_write_stderr PARAMS ((host_callback *, const char *, int)); | |
52 | ||
53 | static void gdb_os_flush_stderr PARAMS ((host_callback *)); | |
54 | ||
8517f62b AC |
55 | static int gdb_os_poll_quit PARAMS ((host_callback *)); |
56 | ||
48ae8057 | 57 | /* printf_filtered is depreciated */ |
4da8b2a5 DE |
58 | static void gdb_os_printf_filtered PARAMS ((host_callback *, const char *, ...)); |
59 | ||
8902803f | 60 | static void gdb_os_vprintf_filtered PARAMS ((host_callback *, const char *, va_list)); |
48ae8057 | 61 | |
8902803f | 62 | static void gdb_os_evprintf_filtered PARAMS ((host_callback *, const char *, va_list)); |
48ae8057 | 63 | |
163a75af DE |
64 | static void gdb_os_error PARAMS ((host_callback *, const char *, ...)); |
65 | ||
8501c742 SG |
66 | static void gdbsim_fetch_register PARAMS ((int regno)); |
67 | ||
68 | static void gdbsim_store_register PARAMS ((int regno)); | |
69 | ||
70 | static void gdbsim_kill PARAMS ((void)); | |
71 | ||
72 | static void gdbsim_load PARAMS ((char *prog, int fromtty)); | |
73 | ||
74 | static void gdbsim_create_inferior PARAMS ((char *exec_file, char *args, char **env)); | |
75 | ||
76 | static void gdbsim_open PARAMS ((char *args, int from_tty)); | |
77 | ||
78 | static void gdbsim_close PARAMS ((int quitting)); | |
79 | ||
80 | static void gdbsim_detach PARAMS ((char *args, int from_tty)); | |
81 | ||
82 | static void gdbsim_resume PARAMS ((int pid, int step, enum target_signal siggnal)); | |
83 | ||
84 | static int gdbsim_wait PARAMS ((int pid, struct target_waitstatus *status)); | |
85 | ||
86 | static void gdbsim_prepare_to_store PARAMS ((void)); | |
87 | ||
88 | static int gdbsim_xfer_inferior_memory PARAMS ((CORE_ADDR memaddr, | |
89 | char *myaddr, int len, | |
90 | int write, | |
91 | struct target_ops *target)); | |
92 | ||
93 | static void gdbsim_files_info PARAMS ((struct target_ops *target)); | |
94 | ||
95 | static void gdbsim_mourn_inferior PARAMS ((void)); | |
96 | ||
8517f62b AC |
97 | static void gdbsim_stop PARAMS ((void)); |
98 | ||
8501c742 SG |
99 | static void simulator_command PARAMS ((char *args, int from_tty)); |
100 | ||
40b92220 JK |
101 | /* Naming convention: |
102 | ||
103 | sim_* are the interface to the simulator (see remote-sim.h). | |
40b92220 | 104 | gdbsim_* are stuff which is internal to gdb. */ |
ec25d19b SC |
105 | |
106 | /* Forward data declarations */ | |
40b92220 | 107 | extern struct target_ops gdbsim_ops; |
ec25d19b | 108 | |
40b92220 JK |
109 | static int program_loaded = 0; |
110 | ||
d9ad8adf DE |
111 | /* We must keep track of whether the simulator has been opened or not because |
112 | GDB can call a target's close routine twice, but sim_close doesn't allow | |
286f83b4 DE |
113 | this. We also need to record the result of sim_open so we can pass it |
114 | back to the other sim_foo routines. */ | |
115 | static SIM_DESC gdbsim_desc = 0; | |
d9ad8adf | 116 | |
40b92220 JK |
117 | static void |
118 | dump_mem (buf, len) | |
119 | char *buf; | |
ec25d19b SC |
120 | int len; |
121 | { | |
40b92220 JK |
122 | if (len <= 8) |
123 | { | |
124 | if (len == 8 || len == 4) | |
125 | { | |
126 | long l[2]; | |
127 | memcpy (l, buf, len); | |
128 | printf_filtered ("\t0x%x", l[0]); | |
129 | printf_filtered (len == 8 ? " 0x%x\n" : "\n", l[1]); | |
130 | } | |
131 | else | |
132 | { | |
133 | int i; | |
134 | printf_filtered ("\t"); | |
135 | for (i = 0; i < len; i++) | |
136 | printf_filtered ("0x%x ", buf[i]); | |
137 | printf_filtered ("\n"); | |
138 | } | |
139 | } | |
140 | } | |
141 | ||
4da8b2a5 DE |
142 | static host_callback gdb_callback; |
143 | static int callbacks_initialized = 0; | |
144 | ||
145 | /* Initialize gdb_callback. */ | |
146 | ||
147 | static void | |
148 | init_callbacks () | |
149 | { | |
150 | if (! callbacks_initialized) | |
151 | { | |
152 | gdb_callback = default_callback; | |
163a75af DE |
153 | gdb_callback.init (&gdb_callback); |
154 | gdb_callback.write_stdout = gdb_os_write_stdout; | |
48ae8057 AC |
155 | gdb_callback.flush_stdout = gdb_os_flush_stdout; |
156 | gdb_callback.write_stderr = gdb_os_write_stderr; | |
157 | gdb_callback.flush_stderr = gdb_os_flush_stderr; | |
163a75af | 158 | gdb_callback.printf_filtered = gdb_os_printf_filtered; |
48ae8057 AC |
159 | gdb_callback.vprintf_filtered = gdb_os_vprintf_filtered; |
160 | gdb_callback.evprintf_filtered = gdb_os_evprintf_filtered; | |
1387cba1 | 161 | gdb_callback.error = gdb_os_error; |
8517f62b AC |
162 | gdb_callback.poll_quit = gdb_os_poll_quit; |
163 | gdb_callback.magic = HOST_CALLBACK_MAGIC; | |
286f83b4 | 164 | sim_set_callbacks (gdbsim_desc, &gdb_callback); |
8517f62b | 165 | |
4da8b2a5 DE |
166 | callbacks_initialized = 1; |
167 | } | |
168 | } | |
169 | ||
170 | /* Release callbacks (free resources used by them). */ | |
171 | ||
172 | static void | |
173 | end_callbacks () | |
174 | { | |
175 | if (callbacks_initialized) | |
176 | { | |
177 | gdb_callback.shutdown (&gdb_callback); | |
178 | callbacks_initialized = 0; | |
179 | } | |
180 | } | |
181 | ||
182 | /* GDB version of os_write_stdout callback. */ | |
183 | ||
184 | static int | |
185 | gdb_os_write_stdout (p, buf, len) | |
186 | host_callback *p; | |
187 | const char *buf; | |
188 | int len; | |
189 | { | |
190 | int i; | |
191 | char b[2]; | |
192 | ||
193 | for (i = 0; i < len; i++) | |
194 | { | |
195 | b[0] = buf[i]; | |
196 | b[1] = 0; | |
197 | if (target_output_hook) | |
198 | target_output_hook (b); | |
199 | else | |
200 | fputs_filtered (b, gdb_stdout); | |
201 | } | |
202 | return len; | |
203 | } | |
204 | ||
48ae8057 AC |
205 | /* GDB version of os_flush_stdout callback. */ |
206 | ||
207 | static void | |
208 | gdb_os_flush_stdout (p) | |
209 | host_callback *p; | |
210 | { | |
211 | gdb_flush (gdb_stdout); | |
212 | } | |
213 | ||
214 | /* GDB version of os_write_stderr callback. */ | |
215 | ||
216 | static int | |
217 | gdb_os_write_stderr (p, buf, len) | |
218 | host_callback *p; | |
219 | const char *buf; | |
220 | int len; | |
221 | { | |
222 | int i; | |
223 | char b[2]; | |
224 | ||
225 | for (i = 0; i < len; i++) | |
226 | { | |
227 | b[0] = buf[i]; | |
228 | b[1] = 0; | |
229 | if (target_output_hook) | |
230 | target_output_hook (b); | |
231 | else | |
232 | fputs_filtered (b, gdb_stderr); | |
233 | } | |
234 | return len; | |
235 | } | |
236 | ||
237 | /* GDB version of os_flush_stderr callback. */ | |
238 | ||
239 | static void | |
240 | gdb_os_flush_stderr (p) | |
241 | host_callback *p; | |
242 | { | |
243 | gdb_flush (gdb_stderr); | |
244 | } | |
245 | ||
8517f62b AC |
246 | /* GDB version of os_poll_quit callback. |
247 | Taken from gdb/util.c - should be in a library */ | |
248 | ||
249 | static int | |
250 | gdb_os_poll_quit (p) | |
251 | host_callback *p; | |
252 | { | |
253 | notice_quit (); | |
254 | if (quit_flag) | |
255 | { | |
256 | quit_flag = 0; /* we've stolen it */ | |
257 | return 1; | |
258 | } | |
259 | else if (immediate_quit) | |
260 | { | |
261 | return 1; | |
262 | } | |
263 | return 0; | |
264 | } | |
265 | ||
4da8b2a5 DE |
266 | /* GDB version of printf_filtered callback. */ |
267 | ||
268 | /* VARARGS */ | |
269 | static void | |
270 | #ifdef ANSI_PROTOTYPES | |
271 | gdb_os_printf_filtered (host_callback *p, const char *format, ...) | |
272 | #else | |
273 | gdb_os_printf_filtered (p, va_alist) | |
274 | host_callback *p; | |
275 | va_dcl | |
276 | #endif | |
277 | { | |
278 | va_list args; | |
279 | #ifdef ANSI_PROTOTYPES | |
280 | va_start (args, format); | |
281 | #else | |
282 | char *format; | |
283 | ||
284 | va_start (args); | |
285 | format = va_arg (args, char *); | |
286 | #endif | |
287 | ||
163a75af | 288 | vfprintf_filtered (gdb_stdout, format, args); |
4da8b2a5 DE |
289 | |
290 | va_end (args); | |
291 | } | |
292 | ||
48ae8057 AC |
293 | /* GDB version of error vprintf_filtered. */ |
294 | ||
295 | /* VARARGS */ | |
296 | static void | |
297 | #ifdef ANSI_PROTOTYPES | |
8902803f | 298 | gdb_os_vprintf_filtered (host_callback *p, const char *format, va_list ap) |
48ae8057 | 299 | #else |
011fa671 | 300 | gdb_os_vprintf_filtered (p, format, ap) |
48ae8057 | 301 | host_callback *p; |
011fa671 | 302 | char *format; |
8902803f | 303 | va_list ap; |
48ae8057 AC |
304 | #endif |
305 | { | |
8902803f | 306 | vfprintf_filtered (gdb_stdout, format, ap); |
48ae8057 AC |
307 | } |
308 | ||
309 | /* GDB version of error evprintf_filtered. */ | |
310 | ||
311 | /* VARARGS */ | |
312 | static void | |
313 | #ifdef ANSI_PROTOTYPES | |
8902803f | 314 | gdb_os_evprintf_filtered (host_callback *p, const char *format, va_list ap) |
48ae8057 | 315 | #else |
011fa671 | 316 | gdb_os_evprintf_filtered (p, format, ap) |
48ae8057 | 317 | host_callback *p; |
011fa671 | 318 | char *format; |
8902803f | 319 | va_list ap; |
48ae8057 AC |
320 | #endif |
321 | { | |
8902803f | 322 | vfprintf_filtered (gdb_stderr, format, ap); |
48ae8057 AC |
323 | } |
324 | ||
163a75af DE |
325 | /* GDB version of error callback. */ |
326 | ||
327 | /* VARARGS */ | |
328 | static void | |
329 | #ifdef ANSI_PROTOTYPES | |
330 | gdb_os_error (host_callback *p, const char *format, ...) | |
331 | #else | |
332 | gdb_os_error (p, va_alist) | |
333 | host_callback *p; | |
334 | va_dcl | |
335 | #endif | |
336 | { | |
337 | if (error_hook) | |
338 | (*error_hook) (); | |
339 | else | |
340 | { | |
341 | va_list args; | |
342 | #ifdef ANSI_PROTOTYPES | |
343 | va_start (args, format); | |
344 | #else | |
345 | char *format; | |
346 | ||
347 | va_start (args); | |
348 | format = va_arg (args, char *); | |
349 | #endif | |
350 | ||
351 | error_begin (); | |
352 | vfprintf_filtered (gdb_stderr, format, args); | |
353 | fprintf_filtered (gdb_stderr, "\n"); | |
354 | va_end (args); | |
355 | return_to_top_level (RETURN_ERROR); | |
356 | } | |
357 | } | |
358 | ||
40b92220 JK |
359 | static void |
360 | gdbsim_fetch_register (regno) | |
361 | int regno; | |
362 | { | |
363 | if (regno == -1) | |
364 | { | |
365 | for (regno = 0; regno < NUM_REGS; regno++) | |
366 | gdbsim_fetch_register (regno); | |
367 | } | |
368 | else | |
369 | { | |
370 | char buf[MAX_REGISTER_RAW_SIZE]; | |
371 | ||
286f83b4 | 372 | sim_fetch_register (gdbsim_desc, regno, buf); |
40b92220 JK |
373 | supply_register (regno, buf); |
374 | if (sr_get_debug ()) | |
375 | { | |
376 | printf_filtered ("gdbsim_fetch_register: %d", regno); | |
377 | /* FIXME: We could print something more intelligible. */ | |
378 | dump_mem (buf, REGISTER_RAW_SIZE (regno)); | |
379 | } | |
380 | } | |
ec25d19b SC |
381 | } |
382 | ||
6b009ef6 | 383 | |
a944e79a | 384 | static void |
40b92220 | 385 | gdbsim_store_register (regno) |
ec25d19b SC |
386 | int regno; |
387 | { | |
388 | if (regno == -1) | |
40b92220 JK |
389 | { |
390 | for (regno = 0; regno < NUM_REGS; regno++) | |
391 | gdbsim_store_register (regno); | |
392 | } | |
393 | else | |
394 | { | |
395 | /* FIXME: Until read_register() returns LONGEST, we have this. */ | |
3beff94e SC |
396 | char tmp[MAX_REGISTER_RAW_SIZE]; |
397 | read_register_gen (regno, tmp); | |
286f83b4 | 398 | sim_store_register (gdbsim_desc, regno, tmp); |
40b92220 JK |
399 | if (sr_get_debug ()) |
400 | { | |
401 | printf_filtered ("gdbsim_store_register: %d", regno); | |
402 | /* FIXME: We could print something more intelligible. */ | |
3beff94e | 403 | dump_mem (tmp, REGISTER_RAW_SIZE (regno)); |
40b92220 JK |
404 | } |
405 | } | |
ec25d19b SC |
406 | } |
407 | ||
47424e79 DE |
408 | /* Kill the running program. This may involve closing any open files |
409 | and releasing other resources acquired by the simulated program. */ | |
410 | ||
40b92220 JK |
411 | static void |
412 | gdbsim_kill () | |
413 | { | |
414 | if (sr_get_debug ()) | |
415 | printf_filtered ("gdbsim_kill\n"); | |
416 | ||
286f83b4 | 417 | sim_kill (gdbsim_desc); /* close fd's, remove mappings, etc. */ |
40b92220 JK |
418 | inferior_pid = 0; |
419 | } | |
420 | ||
421 | /* Load an executable file into the target process. This is expected to | |
422 | not only bring new code into the target process, but also to update | |
423 | GDB's symbol tables to match. */ | |
ec25d19b | 424 | |
ec25d19b | 425 | static void |
40b92220 JK |
426 | gdbsim_load (prog, fromtty) |
427 | char *prog; | |
428 | int fromtty; | |
ec25d19b | 429 | { |
40b92220 JK |
430 | if (sr_get_debug ()) |
431 | printf_filtered ("gdbsim_load: prog \"%s\"\n", prog); | |
ec25d19b | 432 | |
47424e79 DE |
433 | inferior_pid = 0; |
434 | ||
44cd79e4 DE |
435 | /* FIXME: We will print two messages on error. |
436 | Need error to either not print anything if passed NULL or need | |
437 | another routine that doesn't take any arguments. */ | |
438 | if (sim_load (gdbsim_desc, prog, NULL, fromtty) == SIM_RC_FAIL) | |
439 | error ("unable to load program"); | |
47424e79 | 440 | |
44cd79e4 | 441 | program_loaded = 1; |
40b92220 JK |
442 | } |
443 | ||
ec25d19b | 444 | |
40b92220 JK |
445 | /* Start an inferior process and set inferior_pid to its pid. |
446 | EXEC_FILE is the file to run. | |
163a75af | 447 | ARGS is a string containing the arguments to the program. |
40b92220 JK |
448 | ENV is the environment vector to pass. Errors reported with error(). |
449 | On VxWorks and various standalone systems, we ignore exec_file. */ | |
ec25d19b SC |
450 | /* This is called not only when we first attach, but also when the |
451 | user types "run" after having attached. */ | |
40b92220 JK |
452 | |
453 | static void | |
454 | gdbsim_create_inferior (exec_file, args, env) | |
455 | char *exec_file; | |
ec25d19b SC |
456 | char *args; |
457 | char **env; | |
458 | { | |
47424e79 | 459 | int len; |
40b92220 | 460 | char *arg_buf,**argv; |
47424e79 | 461 | CORE_ADDR entry_pt; |
ec25d19b | 462 | |
40b92220 JK |
463 | if (! program_loaded) |
464 | error ("No program loaded."); | |
ec25d19b | 465 | |
40b92220 JK |
466 | if (sr_get_debug ()) |
467 | printf_filtered ("gdbsim_create_inferior: exec_file \"%s\", args \"%s\"\n", | |
468 | exec_file, args); | |
469 | ||
470 | if (exec_file == 0 || exec_bfd == 0) | |
471 | error ("No exec file specified."); | |
ec25d19b | 472 | |
47424e79 | 473 | entry_pt = (CORE_ADDR) bfd_get_start_address (exec_bfd); |
40b92220 | 474 | |
8501c742 | 475 | gdbsim_kill (); |
40b92220 | 476 | remove_breakpoints (); |
ec25d19b | 477 | init_wait_for_inferior (); |
ec25d19b | 478 | |
163a75af | 479 | len = strlen (exec_file) + 1 + strlen (args) + 1 + /*slop*/ 10; |
40b92220 JK |
480 | arg_buf = (char *) alloca (len); |
481 | arg_buf[0] = '\0'; | |
482 | strcat (arg_buf, exec_file); | |
483 | strcat (arg_buf, " "); | |
484 | strcat (arg_buf, args); | |
485 | argv = buildargv (arg_buf); | |
486 | make_cleanup (freeargv, (char *) argv); | |
44cd79e4 | 487 | sim_create_inferior (gdbsim_desc, argv, env); |
40b92220 JK |
488 | |
489 | inferior_pid = 42; | |
490 | insert_breakpoints (); /* Needed to get correct instruction in cache */ | |
45dc9be3 | 491 | proceed (entry_pt, TARGET_SIGNAL_DEFAULT, 0); |
40b92220 | 492 | } |
ec25d19b | 493 | |
40b92220 JK |
494 | /* The open routine takes the rest of the parameters from the command, |
495 | and (if successful) pushes a new target onto the stack. | |
496 | Targets should supply this routine, if only to provide an error message. */ | |
497 | /* Called when selecting the simulator. EG: (gdb) target sim name. */ | |
ec25d19b | 498 | |
a944e79a | 499 | static void |
40b92220 JK |
500 | gdbsim_open (args, from_tty) |
501 | char *args; | |
ec25d19b SC |
502 | int from_tty; |
503 | { | |
286f83b4 DE |
504 | int len; |
505 | char *arg_buf; | |
506 | char **argv; | |
507 | ||
40b92220 | 508 | if (sr_get_debug ()) |
47424e79 | 509 | printf_filtered ("gdbsim_open: args \"%s\"\n", args ? args : "(null)"); |
7a29d686 | 510 | |
d9ad8adf DE |
511 | /* Remove current simulator if one exists. Only do this if the simulator |
512 | has been opened because sim_close requires it. | |
513 | This is important because the call to push_target below will cause | |
514 | sim_close to be called if the simulator is already open, but push_target | |
515 | is called after sim_open! We can't move the call to push_target before | |
516 | the call to sim_open because sim_open may invoke `error'. */ | |
286f83b4 | 517 | if (gdbsim_desc != NULL) |
d9ad8adf DE |
518 | unpush_target (&gdbsim_ops); |
519 | ||
4da8b2a5 | 520 | init_callbacks (); |
7a29d686 | 521 | |
44cd79e4 | 522 | len = 7 + 1 + (args ? strlen (args) : 0) + 50; |
286f83b4 | 523 | arg_buf = (char *) alloca (len); |
0c4cec9f DE |
524 | sprintf (arg_buf, "gdbsim%s%s", |
525 | args ? " " : "", args ? args : ""); | |
526 | #ifdef TARGET_BYTE_ORDER_SELECTABLE | |
527 | if (TARGET_BYTE_ORDER == BIG_ENDIAN) | |
528 | strcat (arg_buf, " -E big"); | |
529 | else | |
530 | strcat (arg_buf, " -E little"); | |
531 | #endif | |
286f83b4 DE |
532 | argv = buildargv (arg_buf); |
533 | if (argv == NULL) | |
534 | error ("Insufficient memory available to allocate simulator arg list."); | |
535 | make_cleanup (freeargv, (char *) argv); | |
536 | ||
99097077 DE |
537 | gdbsim_desc = sim_open (SIM_OPEN_DEBUG, argv); |
538 | if (gdbsim_desc == 0) | |
539 | error ("unable to create simulator instance"); | |
3e38efa0 | 540 | |
40b92220 JK |
541 | push_target (&gdbsim_ops); |
542 | target_fetch_registers (-1); | |
40b92220 | 543 | printf_filtered ("Connected to the simulator.\n"); |
ec25d19b SC |
544 | } |
545 | ||
40b92220 JK |
546 | /* Does whatever cleanup is required for a target that we are no longer |
547 | going to be calling. Argument says whether we are quitting gdb and | |
548 | should not get hung in case of errors, or whether we want a clean | |
549 | termination even if it takes a while. This routine is automatically | |
550 | always called just before a routine is popped off the target stack. | |
551 | Closing file descriptors and freeing memory are typical things it should | |
552 | do. */ | |
ec25d19b SC |
553 | /* Close out all files and local state before this target loses control. */ |
554 | ||
a944e79a | 555 | static void |
40b92220 | 556 | gdbsim_close (quitting) |
ec25d19b SC |
557 | int quitting; |
558 | { | |
40b92220 JK |
559 | if (sr_get_debug ()) |
560 | printf_filtered ("gdbsim_close: quitting %d\n", quitting); | |
561 | ||
562 | program_loaded = 0; | |
563 | ||
286f83b4 | 564 | if (gdbsim_desc != NULL) |
d9ad8adf | 565 | { |
286f83b4 DE |
566 | sim_close (gdbsim_desc, quitting); |
567 | gdbsim_desc = NULL; | |
d9ad8adf | 568 | } |
4da8b2a5 DE |
569 | |
570 | end_callbacks (); | |
ec25d19b SC |
571 | } |
572 | ||
40b92220 JK |
573 | /* Takes a program previously attached to and detaches it. |
574 | The program may resume execution (some targets do, some don't) and will | |
575 | no longer stop on signals, etc. We better not have left any breakpoints | |
576 | in the program or it'll die when it hits one. ARGS is arguments | |
577 | typed by the user (e.g. a signal to send the process). FROM_TTY | |
578 | says whether to be verbose or not. */ | |
ec25d19b | 579 | /* Terminate the open connection to the remote debugger. |
40b92220 JK |
580 | Use this when you want to detach and do something else with your gdb. */ |
581 | ||
582 | static void | |
583 | gdbsim_detach (args,from_tty) | |
ec25d19b SC |
584 | char *args; |
585 | int from_tty; | |
586 | { | |
40b92220 JK |
587 | if (sr_get_debug ()) |
588 | printf_filtered ("gdbsim_detach: args \"%s\"\n", args); | |
a944e79a | 589 | |
40b92220 JK |
590 | pop_target (); /* calls gdbsim_close to do the real work */ |
591 | if (from_tty) | |
592 | printf_filtered ("Ending simulator %s debugging\n", target_shortname); | |
ec25d19b SC |
593 | } |
594 | ||
40b92220 JK |
595 | /* Resume execution of the target process. STEP says whether to single-step |
596 | or to run free; SIGGNAL is the signal value (e.g. SIGINT) to be given | |
597 | to the target, or zero for no signal. */ | |
598 | ||
8517f62b AC |
599 | static enum target_signal resume_siggnal; |
600 | static int resume_step; | |
601 | ||
40b92220 JK |
602 | static void |
603 | gdbsim_resume (pid, step, siggnal) | |
67ac9759 JK |
604 | int pid, step; |
605 | enum target_signal siggnal; | |
40b92220 | 606 | { |
6bafbdfb JL |
607 | if (inferior_pid != 42) |
608 | error ("The program is not being run."); | |
609 | ||
40b92220 JK |
610 | if (sr_get_debug ()) |
611 | printf_filtered ("gdbsim_resume: step %d, signal %d\n", step, siggnal); | |
ec25d19b | 612 | |
8517f62b AC |
613 | resume_siggnal = siggnal; |
614 | resume_step = step; | |
615 | } | |
616 | ||
617 | /* Notify the simulator of an asynchronous request to stop. | |
618 | Since some simulators can not stop, help them out. | |
619 | When stepping, need to also notify the client that it | |
620 | too should quit */ | |
621 | ||
622 | static void | |
623 | gdbsim_stop () | |
624 | { | |
625 | if (! sim_stop (gdbsim_desc)) | |
626 | { | |
627 | error ("gdbsim_stop: simulator failed to stop!\n"); | |
628 | } | |
40b92220 | 629 | } |
ec25d19b | 630 | |
40b92220 JK |
631 | /* Wait for inferior process to do something. Return pid of child, |
632 | or -1 in case of error; store status through argument pointer STATUS, | |
8517f62b AC |
633 | just as `wait' would. */ |
634 | ||
635 | static void (*prev_sigint) (); | |
636 | ||
637 | static void | |
638 | gdbsim_cntrl_c (int signo) | |
639 | { | |
640 | gdbsim_stop (); | |
641 | } | |
ec25d19b | 642 | |
40b92220 | 643 | static int |
de43d7d0 SG |
644 | gdbsim_wait (pid, status) |
645 | int pid; | |
67ac9759 | 646 | struct target_waitstatus *status; |
ec25d19b | 647 | { |
8517f62b AC |
648 | int sigrc = 0; |
649 | enum sim_stop reason = sim_running; | |
592f517a | 650 | |
40b92220 | 651 | if (sr_get_debug ()) |
67ac9759 JK |
652 | printf_filtered ("gdbsim_wait\n"); |
653 | ||
8517f62b AC |
654 | prev_sigint = signal (SIGINT, gdbsim_cntrl_c); |
655 | sim_resume (gdbsim_desc, resume_step, | |
656 | target_signal_to_host (resume_siggnal)); | |
657 | signal (SIGINT, prev_sigint); | |
658 | resume_step = 0; | |
659 | ||
286f83b4 | 660 | sim_stop_reason (gdbsim_desc, &reason, &sigrc); |
8517f62b | 661 | |
67ac9759 JK |
662 | switch (reason) |
663 | { | |
664 | case sim_exited: | |
665 | status->kind = TARGET_WAITKIND_EXITED; | |
666 | status->value.integer = sigrc; | |
667 | break; | |
668 | case sim_stopped: | |
8517f62b AC |
669 | switch (sigrc) |
670 | { | |
671 | case SIGABRT: | |
672 | quit (); | |
673 | break; | |
674 | case SIGINT: | |
675 | case SIGTRAP: | |
676 | default: | |
677 | status->kind = TARGET_WAITKIND_STOPPED; | |
678 | /* The signal in sigrc is a host signal. That probably | |
679 | should be fixed. */ | |
680 | status->value.sig = target_signal_from_host (sigrc); | |
681 | break; | |
682 | } | |
67ac9759 JK |
683 | break; |
684 | case sim_signalled: | |
685 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
686 | /* The signal in sigrc is a host signal. That probably | |
687 | should be fixed. */ | |
688 | status->value.sig = target_signal_from_host (sigrc); | |
689 | break; | |
690 | } | |
691 | ||
3f0184ac | 692 | return inferior_pid; |
ec25d19b SC |
693 | } |
694 | ||
40b92220 JK |
695 | /* Get ready to modify the registers array. On machines which store |
696 | individual registers, this doesn't need to do anything. On machines | |
697 | which store all the registers in one fell swoop, this makes sure | |
698 | that registers contains all the registers from the program being | |
699 | debugged. */ | |
700 | ||
ec25d19b | 701 | static void |
40b92220 | 702 | gdbsim_prepare_to_store () |
ec25d19b | 703 | { |
40b92220 | 704 | /* Do nothing, since we can store individual regs */ |
ec25d19b SC |
705 | } |
706 | ||
40b92220 JK |
707 | static int |
708 | gdbsim_xfer_inferior_memory (memaddr, myaddr, len, write, target) | |
ec25d19b SC |
709 | CORE_ADDR memaddr; |
710 | char *myaddr; | |
711 | int len; | |
712 | int write; | |
713 | struct target_ops *target; /* ignored */ | |
714 | { | |
40b92220 JK |
715 | if (! program_loaded) |
716 | error ("No program loaded."); | |
717 | ||
718 | if (sr_get_debug ()) | |
719 | { | |
720 | printf_filtered ("gdbsim_xfer_inferior_memory: myaddr 0x%x, memaddr 0x%x, len %d, write %d\n", | |
721 | myaddr, memaddr, len, write); | |
722 | if (sr_get_debug () && write) | |
723 | dump_mem(myaddr, len); | |
724 | } | |
725 | ||
ec25d19b | 726 | if (write) |
40b92220 | 727 | { |
286f83b4 | 728 | len = sim_write (gdbsim_desc, memaddr, myaddr, len); |
40b92220 | 729 | } |
ec25d19b | 730 | else |
40b92220 | 731 | { |
286f83b4 | 732 | len = sim_read (gdbsim_desc, memaddr, myaddr, len); |
40b92220 JK |
733 | if (sr_get_debug () && len > 0) |
734 | dump_mem(myaddr, len); | |
735 | } | |
ec25d19b SC |
736 | return len; |
737 | } | |
738 | ||
40b92220 JK |
739 | static void |
740 | gdbsim_files_info (target) | |
741 | struct target_ops *target; | |
742 | { | |
743 | char *file = "nothing"; | |
ec25d19b | 744 | |
40b92220 JK |
745 | if (exec_bfd) |
746 | file = bfd_get_filename (exec_bfd); | |
ec25d19b | 747 | |
40b92220 JK |
748 | if (sr_get_debug ()) |
749 | printf_filtered ("gdbsim_files_info: file \"%s\"\n", file); | |
750 | ||
751 | if (exec_bfd) | |
752 | { | |
753 | printf_filtered ("\tAttached to %s running program %s\n", | |
754 | target_shortname, file); | |
286f83b4 | 755 | sim_info (gdbsim_desc, 0); |
40b92220 | 756 | } |
ec25d19b SC |
757 | } |
758 | ||
fb506180 | 759 | /* Clear the simulator's notion of what the break points are. */ |
ec25d19b | 760 | |
40b92220 JK |
761 | static void |
762 | gdbsim_mourn_inferior () | |
763 | { | |
764 | if (sr_get_debug ()) | |
765 | printf_filtered ("gdbsim_mourn_inferior:\n"); | |
ec25d19b | 766 | |
40b92220 JK |
767 | remove_breakpoints (); |
768 | generic_mourn_inferior (); | |
ec25d19b | 769 | } |
40b92220 | 770 | |
07997f65 SS |
771 | /* Pass the command argument through to the simulator verbatim. The |
772 | simulator must do any command interpretation work. */ | |
ec25d19b | 773 | |
fb506180 SS |
774 | static void |
775 | simulator_command (args, from_tty) | |
776 | char *args; | |
777 | int from_tty; | |
ec25d19b | 778 | { |
07997f65 SS |
779 | /* The user may give a command before the simulator is opened, so |
780 | ensure that the callbacks have been set up. */ | |
4da8b2a5 | 781 | init_callbacks (); |
07997f65 | 782 | |
286f83b4 DE |
783 | /* Note that if the simulator hasn't been opened, gdbsim_desc == NULL |
784 | which is correct (??? assuming of course one wishes to continue to | |
785 | allow commands to be sent to unopened simulators, which isn't entirely | |
12967062 FF |
786 | unreasonable). Simulators should be prepared to deal with any |
787 | combination of NULL or empty args. */ | |
286f83b4 | 788 | sim_do_command (gdbsim_desc, args); |
fb506180 SS |
789 | } |
790 | ||
791 | /* Define the target subroutine names */ | |
792 | ||
793 | struct target_ops gdbsim_ops = { | |
794 | "sim", /* to_shortname */ | |
795 | "simulator", /* to_longname */ | |
796 | "Use the compiled-in simulator.", /* to_doc */ | |
797 | gdbsim_open, /* to_open */ | |
798 | gdbsim_close, /* to_close */ | |
799 | NULL, /* to_attach */ | |
800 | gdbsim_detach, /* to_detach */ | |
801 | gdbsim_resume, /* to_resume */ | |
802 | gdbsim_wait, /* to_wait */ | |
803 | gdbsim_fetch_register, /* to_fetch_registers */ | |
804 | gdbsim_store_register, /* to_store_registers */ | |
805 | gdbsim_prepare_to_store, /* to_prepare_to_store */ | |
806 | gdbsim_xfer_inferior_memory, /* to_xfer_memory */ | |
807 | gdbsim_files_info, /* to_files_info */ | |
808 | memory_insert_breakpoint, /* to_insert_breakpoint */ | |
809 | memory_remove_breakpoint, /* to_remove_breakpoint */ | |
810 | NULL, /* to_terminal_init */ | |
811 | NULL, /* to_terminal_inferior */ | |
812 | NULL, /* to_terminal_ours_for_output */ | |
813 | NULL, /* to_terminal_ours */ | |
814 | NULL, /* to_terminal_info */ | |
815 | gdbsim_kill, /* to_kill */ | |
816 | gdbsim_load, /* to_load */ | |
817 | NULL, /* to_lookup_symbol */ | |
818 | gdbsim_create_inferior, /* to_create_inferior */ | |
819 | gdbsim_mourn_inferior, /* to_mourn_inferior */ | |
820 | 0, /* to_can_run */ | |
821 | 0, /* to_notice_signals */ | |
43fc25c8 | 822 | 0, /* to_thread_alive */ |
8517f62b | 823 | gdbsim_stop, /* to_stop */ |
fb506180 SS |
824 | process_stratum, /* to_stratum */ |
825 | NULL, /* to_next */ | |
826 | 1, /* to_has_all_memory */ | |
827 | 1, /* to_has_memory */ | |
828 | 1, /* to_has_stack */ | |
829 | 1, /* to_has_registers */ | |
830 | 1, /* to_has_execution */ | |
831 | NULL, /* sections */ | |
832 | NULL, /* sections_end */ | |
833 | OPS_MAGIC, /* to_magic */ | |
ec25d19b SC |
834 | }; |
835 | ||
ec25d19b SC |
836 | void |
837 | _initialize_remote_sim () | |
838 | { | |
40b92220 | 839 | add_target (&gdbsim_ops); |
fb506180 SS |
840 | |
841 | add_com ("sim <command>", class_obscure, simulator_command, | |
842 | "Send a command to the simulator."); | |
ec25d19b | 843 | } |