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; | |
4da8b2a5 DE |
164 | callbacks_initialized = 1; |
165 | } | |
166 | } | |
167 | ||
168 | /* Release callbacks (free resources used by them). */ | |
169 | ||
170 | static void | |
171 | end_callbacks () | |
172 | { | |
173 | if (callbacks_initialized) | |
174 | { | |
175 | gdb_callback.shutdown (&gdb_callback); | |
176 | callbacks_initialized = 0; | |
177 | } | |
178 | } | |
179 | ||
180 | /* GDB version of os_write_stdout callback. */ | |
181 | ||
182 | static int | |
183 | gdb_os_write_stdout (p, buf, len) | |
184 | host_callback *p; | |
185 | const char *buf; | |
186 | int len; | |
187 | { | |
188 | int i; | |
189 | char b[2]; | |
190 | ||
191 | for (i = 0; i < len; i++) | |
192 | { | |
193 | b[0] = buf[i]; | |
194 | b[1] = 0; | |
195 | if (target_output_hook) | |
196 | target_output_hook (b); | |
197 | else | |
198 | fputs_filtered (b, gdb_stdout); | |
199 | } | |
200 | return len; | |
201 | } | |
202 | ||
48ae8057 AC |
203 | /* GDB version of os_flush_stdout callback. */ |
204 | ||
205 | static void | |
206 | gdb_os_flush_stdout (p) | |
207 | host_callback *p; | |
208 | { | |
209 | gdb_flush (gdb_stdout); | |
210 | } | |
211 | ||
212 | /* GDB version of os_write_stderr callback. */ | |
213 | ||
214 | static int | |
215 | gdb_os_write_stderr (p, buf, len) | |
216 | host_callback *p; | |
217 | const char *buf; | |
218 | int len; | |
219 | { | |
220 | int i; | |
221 | char b[2]; | |
222 | ||
223 | for (i = 0; i < len; i++) | |
224 | { | |
225 | b[0] = buf[i]; | |
226 | b[1] = 0; | |
227 | if (target_output_hook) | |
228 | target_output_hook (b); | |
229 | else | |
230 | fputs_filtered (b, gdb_stderr); | |
231 | } | |
232 | return len; | |
233 | } | |
234 | ||
235 | /* GDB version of os_flush_stderr callback. */ | |
236 | ||
237 | static void | |
238 | gdb_os_flush_stderr (p) | |
239 | host_callback *p; | |
240 | { | |
241 | gdb_flush (gdb_stderr); | |
242 | } | |
243 | ||
4da8b2a5 DE |
244 | /* GDB version of printf_filtered callback. */ |
245 | ||
246 | /* VARARGS */ | |
247 | static void | |
248 | #ifdef ANSI_PROTOTYPES | |
249 | gdb_os_printf_filtered (host_callback *p, const char *format, ...) | |
250 | #else | |
251 | gdb_os_printf_filtered (p, va_alist) | |
252 | host_callback *p; | |
253 | va_dcl | |
254 | #endif | |
255 | { | |
256 | va_list args; | |
257 | #ifdef ANSI_PROTOTYPES | |
258 | va_start (args, format); | |
259 | #else | |
260 | char *format; | |
261 | ||
262 | va_start (args); | |
263 | format = va_arg (args, char *); | |
264 | #endif | |
265 | ||
163a75af | 266 | vfprintf_filtered (gdb_stdout, format, args); |
4da8b2a5 DE |
267 | |
268 | va_end (args); | |
269 | } | |
270 | ||
48ae8057 AC |
271 | /* GDB version of error vprintf_filtered. */ |
272 | ||
273 | /* VARARGS */ | |
274 | static void | |
275 | #ifdef ANSI_PROTOTYPES | |
8902803f | 276 | gdb_os_vprintf_filtered (host_callback *p, const char *format, va_list ap) |
48ae8057 | 277 | #else |
011fa671 | 278 | gdb_os_vprintf_filtered (p, format, ap) |
48ae8057 | 279 | host_callback *p; |
011fa671 | 280 | char *format; |
8902803f | 281 | va_list ap; |
48ae8057 AC |
282 | #endif |
283 | { | |
8902803f | 284 | vfprintf_filtered (gdb_stdout, format, ap); |
48ae8057 AC |
285 | } |
286 | ||
287 | /* GDB version of error evprintf_filtered. */ | |
288 | ||
289 | /* VARARGS */ | |
290 | static void | |
291 | #ifdef ANSI_PROTOTYPES | |
8902803f | 292 | gdb_os_evprintf_filtered (host_callback *p, const char *format, va_list ap) |
48ae8057 | 293 | #else |
011fa671 | 294 | gdb_os_evprintf_filtered (p, format, ap) |
48ae8057 | 295 | host_callback *p; |
011fa671 | 296 | char *format; |
8902803f | 297 | va_list ap; |
48ae8057 AC |
298 | #endif |
299 | { | |
8902803f | 300 | vfprintf_filtered (gdb_stderr, format, ap); |
48ae8057 AC |
301 | } |
302 | ||
163a75af DE |
303 | /* GDB version of error callback. */ |
304 | ||
305 | /* VARARGS */ | |
306 | static void | |
307 | #ifdef ANSI_PROTOTYPES | |
308 | gdb_os_error (host_callback *p, const char *format, ...) | |
309 | #else | |
310 | gdb_os_error (p, va_alist) | |
311 | host_callback *p; | |
312 | va_dcl | |
313 | #endif | |
314 | { | |
315 | if (error_hook) | |
316 | (*error_hook) (); | |
317 | else | |
318 | { | |
319 | va_list args; | |
320 | #ifdef ANSI_PROTOTYPES | |
321 | va_start (args, format); | |
322 | #else | |
323 | char *format; | |
324 | ||
325 | va_start (args); | |
326 | format = va_arg (args, char *); | |
327 | #endif | |
328 | ||
329 | error_begin (); | |
330 | vfprintf_filtered (gdb_stderr, format, args); | |
331 | fprintf_filtered (gdb_stderr, "\n"); | |
332 | va_end (args); | |
333 | return_to_top_level (RETURN_ERROR); | |
334 | } | |
335 | } | |
336 | ||
40b92220 JK |
337 | static void |
338 | gdbsim_fetch_register (regno) | |
339 | int regno; | |
340 | { | |
341 | if (regno == -1) | |
342 | { | |
343 | for (regno = 0; regno < NUM_REGS; regno++) | |
344 | gdbsim_fetch_register (regno); | |
345 | } | |
346 | else | |
347 | { | |
348 | char buf[MAX_REGISTER_RAW_SIZE]; | |
349 | ||
286f83b4 | 350 | sim_fetch_register (gdbsim_desc, regno, buf); |
40b92220 JK |
351 | supply_register (regno, buf); |
352 | if (sr_get_debug ()) | |
353 | { | |
354 | printf_filtered ("gdbsim_fetch_register: %d", regno); | |
355 | /* FIXME: We could print something more intelligible. */ | |
356 | dump_mem (buf, REGISTER_RAW_SIZE (regno)); | |
357 | } | |
358 | } | |
ec25d19b SC |
359 | } |
360 | ||
6b009ef6 | 361 | |
a944e79a | 362 | static void |
40b92220 | 363 | gdbsim_store_register (regno) |
ec25d19b SC |
364 | int regno; |
365 | { | |
366 | if (regno == -1) | |
40b92220 JK |
367 | { |
368 | for (regno = 0; regno < NUM_REGS; regno++) | |
369 | gdbsim_store_register (regno); | |
370 | } | |
371 | else | |
372 | { | |
373 | /* FIXME: Until read_register() returns LONGEST, we have this. */ | |
3beff94e SC |
374 | char tmp[MAX_REGISTER_RAW_SIZE]; |
375 | read_register_gen (regno, tmp); | |
286f83b4 | 376 | sim_store_register (gdbsim_desc, regno, tmp); |
40b92220 JK |
377 | if (sr_get_debug ()) |
378 | { | |
379 | printf_filtered ("gdbsim_store_register: %d", regno); | |
380 | /* FIXME: We could print something more intelligible. */ | |
3beff94e | 381 | dump_mem (tmp, REGISTER_RAW_SIZE (regno)); |
40b92220 JK |
382 | } |
383 | } | |
ec25d19b SC |
384 | } |
385 | ||
47424e79 DE |
386 | /* Kill the running program. This may involve closing any open files |
387 | and releasing other resources acquired by the simulated program. */ | |
388 | ||
40b92220 JK |
389 | static void |
390 | gdbsim_kill () | |
391 | { | |
392 | if (sr_get_debug ()) | |
393 | printf_filtered ("gdbsim_kill\n"); | |
394 | ||
286f83b4 | 395 | sim_kill (gdbsim_desc); /* close fd's, remove mappings, etc. */ |
40b92220 JK |
396 | inferior_pid = 0; |
397 | } | |
398 | ||
399 | /* Load an executable file into the target process. This is expected to | |
400 | not only bring new code into the target process, but also to update | |
401 | GDB's symbol tables to match. */ | |
ec25d19b | 402 | |
ec25d19b | 403 | static void |
40b92220 JK |
404 | gdbsim_load (prog, fromtty) |
405 | char *prog; | |
406 | int fromtty; | |
ec25d19b | 407 | { |
40b92220 JK |
408 | if (sr_get_debug ()) |
409 | printf_filtered ("gdbsim_load: prog \"%s\"\n", prog); | |
ec25d19b | 410 | |
47424e79 DE |
411 | inferior_pid = 0; |
412 | ||
44cd79e4 DE |
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) | |
417 | error ("unable to load program"); | |
47424e79 | 418 | |
44cd79e4 | 419 | program_loaded = 1; |
40b92220 JK |
420 | } |
421 | ||
ec25d19b | 422 | |
40b92220 JK |
423 | /* Start an inferior process and set inferior_pid to its pid. |
424 | EXEC_FILE is the file to run. | |
163a75af | 425 | ARGS is a string containing the arguments to the program. |
40b92220 JK |
426 | ENV is the environment vector to pass. Errors reported with error(). |
427 | On VxWorks and various standalone systems, we ignore exec_file. */ | |
ec25d19b SC |
428 | /* This is called not only when we first attach, but also when the |
429 | user types "run" after having attached. */ | |
40b92220 JK |
430 | |
431 | static void | |
432 | gdbsim_create_inferior (exec_file, args, env) | |
433 | char *exec_file; | |
ec25d19b SC |
434 | char *args; |
435 | char **env; | |
436 | { | |
47424e79 | 437 | int len; |
40b92220 | 438 | char *arg_buf,**argv; |
47424e79 | 439 | CORE_ADDR entry_pt; |
ec25d19b | 440 | |
40b92220 JK |
441 | if (! program_loaded) |
442 | error ("No program loaded."); | |
ec25d19b | 443 | |
40b92220 JK |
444 | if (sr_get_debug ()) |
445 | printf_filtered ("gdbsim_create_inferior: exec_file \"%s\", args \"%s\"\n", | |
446 | exec_file, args); | |
447 | ||
448 | if (exec_file == 0 || exec_bfd == 0) | |
449 | error ("No exec file specified."); | |
ec25d19b | 450 | |
47424e79 | 451 | entry_pt = (CORE_ADDR) bfd_get_start_address (exec_bfd); |
40b92220 | 452 | |
8501c742 | 453 | gdbsim_kill (); |
40b92220 | 454 | remove_breakpoints (); |
ec25d19b | 455 | init_wait_for_inferior (); |
ec25d19b | 456 | |
163a75af | 457 | len = strlen (exec_file) + 1 + strlen (args) + 1 + /*slop*/ 10; |
40b92220 JK |
458 | arg_buf = (char *) alloca (len); |
459 | arg_buf[0] = '\0'; | |
460 | strcat (arg_buf, exec_file); | |
461 | strcat (arg_buf, " "); | |
462 | strcat (arg_buf, args); | |
463 | argv = buildargv (arg_buf); | |
464 | make_cleanup (freeargv, (char *) argv); | |
44cd79e4 | 465 | sim_create_inferior (gdbsim_desc, argv, env); |
40b92220 JK |
466 | |
467 | inferior_pid = 42; | |
468 | insert_breakpoints (); /* Needed to get correct instruction in cache */ | |
45dc9be3 | 469 | proceed (entry_pt, TARGET_SIGNAL_DEFAULT, 0); |
40b92220 | 470 | } |
ec25d19b | 471 | |
40b92220 JK |
472 | /* The open routine takes the rest of the parameters from the command, |
473 | and (if successful) pushes a new target onto the stack. | |
474 | Targets should supply this routine, if only to provide an error message. */ | |
475 | /* Called when selecting the simulator. EG: (gdb) target sim name. */ | |
ec25d19b | 476 | |
a944e79a | 477 | static void |
40b92220 JK |
478 | gdbsim_open (args, from_tty) |
479 | char *args; | |
ec25d19b SC |
480 | int from_tty; |
481 | { | |
286f83b4 DE |
482 | int len; |
483 | char *arg_buf; | |
484 | char **argv; | |
485 | ||
40b92220 | 486 | if (sr_get_debug ()) |
47424e79 | 487 | printf_filtered ("gdbsim_open: args \"%s\"\n", args ? args : "(null)"); |
7a29d686 | 488 | |
d9ad8adf DE |
489 | /* Remove current simulator if one exists. Only do this if the simulator |
490 | has been opened because sim_close requires it. | |
491 | This is important because the call to push_target below will cause | |
492 | sim_close to be called if the simulator is already open, but push_target | |
493 | is called after sim_open! We can't move the call to push_target before | |
494 | the call to sim_open because sim_open may invoke `error'. */ | |
286f83b4 | 495 | if (gdbsim_desc != NULL) |
d9ad8adf DE |
496 | unpush_target (&gdbsim_ops); |
497 | ||
44cd79e4 | 498 | len = 7 + 1 + (args ? strlen (args) : 0) + 50; |
286f83b4 | 499 | arg_buf = (char *) alloca (len); |
0c4cec9f DE |
500 | sprintf (arg_buf, "gdbsim%s%s", |
501 | args ? " " : "", args ? args : ""); | |
502 | #ifdef TARGET_BYTE_ORDER_SELECTABLE | |
503 | if (TARGET_BYTE_ORDER == BIG_ENDIAN) | |
504 | strcat (arg_buf, " -E big"); | |
505 | else | |
506 | strcat (arg_buf, " -E little"); | |
507 | #endif | |
286f83b4 DE |
508 | argv = buildargv (arg_buf); |
509 | if (argv == NULL) | |
510 | error ("Insufficient memory available to allocate simulator arg list."); | |
511 | make_cleanup (freeargv, (char *) argv); | |
512 | ||
24aa2b57 AC |
513 | init_callbacks (); |
514 | gdbsim_desc = sim_open (SIM_OPEN_DEBUG, &gdb_callback, argv); | |
515 | ||
99097077 DE |
516 | if (gdbsim_desc == 0) |
517 | error ("unable to create simulator instance"); | |
3e38efa0 | 518 | |
40b92220 JK |
519 | push_target (&gdbsim_ops); |
520 | target_fetch_registers (-1); | |
40b92220 | 521 | printf_filtered ("Connected to the simulator.\n"); |
ec25d19b SC |
522 | } |
523 | ||
40b92220 JK |
524 | /* Does whatever cleanup is required for a target that we are no longer |
525 | going to be calling. Argument says whether we are quitting gdb and | |
526 | should not get hung in case of errors, or whether we want a clean | |
527 | termination even if it takes a while. This routine is automatically | |
528 | always called just before a routine is popped off the target stack. | |
529 | Closing file descriptors and freeing memory are typical things it should | |
530 | do. */ | |
ec25d19b SC |
531 | /* Close out all files and local state before this target loses control. */ |
532 | ||
a944e79a | 533 | static void |
40b92220 | 534 | gdbsim_close (quitting) |
ec25d19b SC |
535 | int quitting; |
536 | { | |
40b92220 JK |
537 | if (sr_get_debug ()) |
538 | printf_filtered ("gdbsim_close: quitting %d\n", quitting); | |
539 | ||
540 | program_loaded = 0; | |
541 | ||
286f83b4 | 542 | if (gdbsim_desc != NULL) |
d9ad8adf | 543 | { |
286f83b4 DE |
544 | sim_close (gdbsim_desc, quitting); |
545 | gdbsim_desc = NULL; | |
d9ad8adf | 546 | } |
4da8b2a5 DE |
547 | |
548 | end_callbacks (); | |
ec25d19b SC |
549 | } |
550 | ||
40b92220 JK |
551 | /* Takes a program previously attached to and detaches it. |
552 | The program may resume execution (some targets do, some don't) and will | |
553 | no longer stop on signals, etc. We better not have left any breakpoints | |
554 | in the program or it'll die when it hits one. ARGS is arguments | |
555 | typed by the user (e.g. a signal to send the process). FROM_TTY | |
556 | says whether to be verbose or not. */ | |
ec25d19b | 557 | /* Terminate the open connection to the remote debugger. |
40b92220 JK |
558 | Use this when you want to detach and do something else with your gdb. */ |
559 | ||
560 | static void | |
561 | gdbsim_detach (args,from_tty) | |
ec25d19b SC |
562 | char *args; |
563 | int from_tty; | |
564 | { | |
40b92220 JK |
565 | if (sr_get_debug ()) |
566 | printf_filtered ("gdbsim_detach: args \"%s\"\n", args); | |
a944e79a | 567 | |
40b92220 JK |
568 | pop_target (); /* calls gdbsim_close to do the real work */ |
569 | if (from_tty) | |
570 | printf_filtered ("Ending simulator %s debugging\n", target_shortname); | |
ec25d19b SC |
571 | } |
572 | ||
40b92220 JK |
573 | /* Resume execution of the target process. STEP says whether to single-step |
574 | or to run free; SIGGNAL is the signal value (e.g. SIGINT) to be given | |
575 | to the target, or zero for no signal. */ | |
576 | ||
8517f62b AC |
577 | static enum target_signal resume_siggnal; |
578 | static int resume_step; | |
579 | ||
40b92220 JK |
580 | static void |
581 | gdbsim_resume (pid, step, siggnal) | |
67ac9759 JK |
582 | int pid, step; |
583 | enum target_signal siggnal; | |
40b92220 | 584 | { |
6bafbdfb JL |
585 | if (inferior_pid != 42) |
586 | error ("The program is not being run."); | |
587 | ||
40b92220 JK |
588 | if (sr_get_debug ()) |
589 | printf_filtered ("gdbsim_resume: step %d, signal %d\n", step, siggnal); | |
ec25d19b | 590 | |
8517f62b AC |
591 | resume_siggnal = siggnal; |
592 | resume_step = step; | |
593 | } | |
594 | ||
595 | /* Notify the simulator of an asynchronous request to stop. | |
c14cabba AC |
596 | |
597 | The simulator shall ensure that the stop request is eventually | |
598 | delivered to the simulator. If the call is made while the | |
599 | simulator is not running then the stop request is processed when | |
600 | the simulator is next resumed. | |
601 | ||
602 | For simulators that do not support this operation, just abort */ | |
8517f62b AC |
603 | |
604 | static void | |
605 | gdbsim_stop () | |
606 | { | |
607 | if (! sim_stop (gdbsim_desc)) | |
608 | { | |
c14cabba | 609 | quit (); |
8517f62b | 610 | } |
40b92220 | 611 | } |
ec25d19b | 612 | |
c14cabba AC |
613 | /* GDB version of os_poll_quit callback. |
614 | Taken from gdb/util.c - should be in a library */ | |
615 | ||
616 | static int | |
617 | gdb_os_poll_quit (p) | |
618 | host_callback *p; | |
619 | { | |
620 | notice_quit (); | |
621 | if (quit_flag) /* gdb's idea of quit */ | |
622 | { | |
623 | quit_flag = 0; /* we've stolen it */ | |
624 | return 1; | |
625 | } | |
626 | else if (immediate_quit) | |
627 | { | |
628 | return 1; | |
629 | } | |
630 | return 0; | |
631 | } | |
632 | ||
40b92220 JK |
633 | /* Wait for inferior process to do something. Return pid of child, |
634 | or -1 in case of error; store status through argument pointer STATUS, | |
8517f62b AC |
635 | just as `wait' would. */ |
636 | ||
8517f62b AC |
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 | { |
c14cabba | 648 | static RETSIGTYPE (*prev_sigint) (); |
8517f62b AC |
649 | int sigrc = 0; |
650 | enum sim_stop reason = sim_running; | |
592f517a | 651 | |
40b92220 | 652 | if (sr_get_debug ()) |
67ac9759 JK |
653 | printf_filtered ("gdbsim_wait\n"); |
654 | ||
8517f62b AC |
655 | prev_sigint = signal (SIGINT, gdbsim_cntrl_c); |
656 | sim_resume (gdbsim_desc, resume_step, | |
657 | target_signal_to_host (resume_siggnal)); | |
658 | signal (SIGINT, prev_sigint); | |
659 | resume_step = 0; | |
660 | ||
286f83b4 | 661 | sim_stop_reason (gdbsim_desc, &reason, &sigrc); |
8517f62b | 662 | |
67ac9759 JK |
663 | switch (reason) |
664 | { | |
665 | case sim_exited: | |
666 | status->kind = TARGET_WAITKIND_EXITED; | |
667 | status->value.integer = sigrc; | |
668 | break; | |
669 | case sim_stopped: | |
8517f62b AC |
670 | switch (sigrc) |
671 | { | |
672 | case SIGABRT: | |
673 | quit (); | |
674 | break; | |
675 | case SIGINT: | |
676 | case SIGTRAP: | |
677 | default: | |
678 | status->kind = TARGET_WAITKIND_STOPPED; | |
679 | /* The signal in sigrc is a host signal. That probably | |
680 | should be fixed. */ | |
681 | status->value.sig = target_signal_from_host (sigrc); | |
682 | break; | |
683 | } | |
67ac9759 JK |
684 | break; |
685 | case sim_signalled: | |
686 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
687 | /* The signal in sigrc is a host signal. That probably | |
688 | should be fixed. */ | |
689 | status->value.sig = target_signal_from_host (sigrc); | |
690 | break; | |
691 | } | |
692 | ||
3f0184ac | 693 | return inferior_pid; |
ec25d19b SC |
694 | } |
695 | ||
40b92220 JK |
696 | /* Get ready to modify the registers array. On machines which store |
697 | individual registers, this doesn't need to do anything. On machines | |
698 | which store all the registers in one fell swoop, this makes sure | |
699 | that registers contains all the registers from the program being | |
700 | debugged. */ | |
701 | ||
ec25d19b | 702 | static void |
40b92220 | 703 | gdbsim_prepare_to_store () |
ec25d19b | 704 | { |
40b92220 | 705 | /* Do nothing, since we can store individual regs */ |
ec25d19b SC |
706 | } |
707 | ||
40b92220 JK |
708 | static int |
709 | gdbsim_xfer_inferior_memory (memaddr, myaddr, len, write, target) | |
ec25d19b SC |
710 | CORE_ADDR memaddr; |
711 | char *myaddr; | |
712 | int len; | |
713 | int write; | |
714 | struct target_ops *target; /* ignored */ | |
715 | { | |
40b92220 JK |
716 | if (! program_loaded) |
717 | error ("No program loaded."); | |
718 | ||
719 | if (sr_get_debug ()) | |
720 | { | |
721 | printf_filtered ("gdbsim_xfer_inferior_memory: myaddr 0x%x, memaddr 0x%x, len %d, write %d\n", | |
722 | myaddr, memaddr, len, write); | |
723 | if (sr_get_debug () && write) | |
724 | dump_mem(myaddr, len); | |
725 | } | |
726 | ||
ec25d19b | 727 | if (write) |
40b92220 | 728 | { |
286f83b4 | 729 | len = sim_write (gdbsim_desc, memaddr, myaddr, len); |
40b92220 | 730 | } |
ec25d19b | 731 | else |
40b92220 | 732 | { |
286f83b4 | 733 | len = sim_read (gdbsim_desc, memaddr, myaddr, len); |
40b92220 JK |
734 | if (sr_get_debug () && len > 0) |
735 | dump_mem(myaddr, len); | |
736 | } | |
ec25d19b SC |
737 | return len; |
738 | } | |
739 | ||
40b92220 JK |
740 | static void |
741 | gdbsim_files_info (target) | |
742 | struct target_ops *target; | |
743 | { | |
744 | char *file = "nothing"; | |
ec25d19b | 745 | |
40b92220 JK |
746 | if (exec_bfd) |
747 | file = bfd_get_filename (exec_bfd); | |
ec25d19b | 748 | |
40b92220 JK |
749 | if (sr_get_debug ()) |
750 | printf_filtered ("gdbsim_files_info: file \"%s\"\n", file); | |
751 | ||
752 | if (exec_bfd) | |
753 | { | |
754 | printf_filtered ("\tAttached to %s running program %s\n", | |
755 | target_shortname, file); | |
286f83b4 | 756 | sim_info (gdbsim_desc, 0); |
40b92220 | 757 | } |
ec25d19b SC |
758 | } |
759 | ||
fb506180 | 760 | /* Clear the simulator's notion of what the break points are. */ |
ec25d19b | 761 | |
40b92220 JK |
762 | static void |
763 | gdbsim_mourn_inferior () | |
764 | { | |
765 | if (sr_get_debug ()) | |
766 | printf_filtered ("gdbsim_mourn_inferior:\n"); | |
ec25d19b | 767 | |
40b92220 JK |
768 | remove_breakpoints (); |
769 | generic_mourn_inferior (); | |
ec25d19b | 770 | } |
40b92220 | 771 | |
07997f65 SS |
772 | /* Pass the command argument through to the simulator verbatim. The |
773 | simulator must do any command interpretation work. */ | |
ec25d19b | 774 | |
fb506180 SS |
775 | static void |
776 | simulator_command (args, from_tty) | |
777 | char *args; | |
778 | int from_tty; | |
ec25d19b | 779 | { |
07997f65 SS |
780 | /* The user may give a command before the simulator is opened, so |
781 | ensure that the callbacks have been set up. */ | |
4da8b2a5 | 782 | init_callbacks (); |
07997f65 | 783 | |
286f83b4 DE |
784 | /* Note that if the simulator hasn't been opened, gdbsim_desc == NULL |
785 | which is correct (??? assuming of course one wishes to continue to | |
786 | allow commands to be sent to unopened simulators, which isn't entirely | |
12967062 FF |
787 | unreasonable). Simulators should be prepared to deal with any |
788 | combination of NULL or empty args. */ | |
286f83b4 | 789 | sim_do_command (gdbsim_desc, args); |
fb506180 SS |
790 | } |
791 | ||
792 | /* Define the target subroutine names */ | |
793 | ||
794 | struct target_ops gdbsim_ops = { | |
795 | "sim", /* to_shortname */ | |
796 | "simulator", /* to_longname */ | |
797 | "Use the compiled-in simulator.", /* to_doc */ | |
798 | gdbsim_open, /* to_open */ | |
799 | gdbsim_close, /* to_close */ | |
800 | NULL, /* to_attach */ | |
801 | gdbsim_detach, /* to_detach */ | |
802 | gdbsim_resume, /* to_resume */ | |
803 | gdbsim_wait, /* to_wait */ | |
804 | gdbsim_fetch_register, /* to_fetch_registers */ | |
805 | gdbsim_store_register, /* to_store_registers */ | |
806 | gdbsim_prepare_to_store, /* to_prepare_to_store */ | |
807 | gdbsim_xfer_inferior_memory, /* to_xfer_memory */ | |
808 | gdbsim_files_info, /* to_files_info */ | |
809 | memory_insert_breakpoint, /* to_insert_breakpoint */ | |
810 | memory_remove_breakpoint, /* to_remove_breakpoint */ | |
811 | NULL, /* to_terminal_init */ | |
812 | NULL, /* to_terminal_inferior */ | |
813 | NULL, /* to_terminal_ours_for_output */ | |
814 | NULL, /* to_terminal_ours */ | |
815 | NULL, /* to_terminal_info */ | |
816 | gdbsim_kill, /* to_kill */ | |
817 | gdbsim_load, /* to_load */ | |
818 | NULL, /* to_lookup_symbol */ | |
819 | gdbsim_create_inferior, /* to_create_inferior */ | |
820 | gdbsim_mourn_inferior, /* to_mourn_inferior */ | |
821 | 0, /* to_can_run */ | |
822 | 0, /* to_notice_signals */ | |
43fc25c8 | 823 | 0, /* to_thread_alive */ |
8517f62b | 824 | gdbsim_stop, /* to_stop */ |
fb506180 SS |
825 | process_stratum, /* to_stratum */ |
826 | NULL, /* to_next */ | |
827 | 1, /* to_has_all_memory */ | |
828 | 1, /* to_has_memory */ | |
829 | 1, /* to_has_stack */ | |
830 | 1, /* to_has_registers */ | |
831 | 1, /* to_has_execution */ | |
832 | NULL, /* sections */ | |
833 | NULL, /* sections_end */ | |
834 | OPS_MAGIC, /* to_magic */ | |
ec25d19b SC |
835 | }; |
836 | ||
ec25d19b SC |
837 | void |
838 | _initialize_remote_sim () | |
839 | { | |
40b92220 | 840 | add_target (&gdbsim_ops); |
fb506180 SS |
841 | |
842 | add_com ("sim <command>", class_obscure, simulator_command, | |
843 | "Send a command to the simulator."); | |
ec25d19b | 844 | } |