Commit | Line | Data |
---|---|---|
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" |
40b647e9 | 38 | #include "command.h" |
40b92220 | 39 | |
8501c742 SG |
40 | /* Prototypes */ |
41 | ||
42 | static void dump_mem PARAMS ((char *buf, int len)); | |
43 | ||
4da8b2a5 DE |
44 | static void init_callbacks PARAMS ((void)); |
45 | ||
46 | static void end_callbacks PARAMS ((void)); | |
47 | ||
48 | static int gdb_os_write_stdout PARAMS ((host_callback *, const char *, int)); | |
49 | ||
48ae8057 AC |
50 | static void gdb_os_flush_stdout PARAMS ((host_callback *)); |
51 | ||
52 | static int gdb_os_write_stderr PARAMS ((host_callback *, const char *, int)); | |
53 | ||
54 | static void gdb_os_flush_stderr PARAMS ((host_callback *)); | |
55 | ||
8517f62b AC |
56 | static int gdb_os_poll_quit PARAMS ((host_callback *)); |
57 | ||
48ae8057 | 58 | /* printf_filtered is depreciated */ |
4da8b2a5 DE |
59 | static void gdb_os_printf_filtered PARAMS ((host_callback *, const char *, ...)); |
60 | ||
8902803f | 61 | static void gdb_os_vprintf_filtered PARAMS ((host_callback *, const char *, va_list)); |
48ae8057 | 62 | |
8902803f | 63 | static void gdb_os_evprintf_filtered PARAMS ((host_callback *, const char *, va_list)); |
48ae8057 | 64 | |
163a75af DE |
65 | static void gdb_os_error PARAMS ((host_callback *, const char *, ...)); |
66 | ||
8501c742 SG |
67 | static void gdbsim_fetch_register PARAMS ((int regno)); |
68 | ||
69 | static void gdbsim_store_register PARAMS ((int regno)); | |
70 | ||
71 | static void gdbsim_kill PARAMS ((void)); | |
72 | ||
73 | static void gdbsim_load PARAMS ((char *prog, int fromtty)); | |
74 | ||
75 | static void gdbsim_create_inferior PARAMS ((char *exec_file, char *args, char **env)); | |
76 | ||
77 | static void gdbsim_open PARAMS ((char *args, int from_tty)); | |
78 | ||
79 | static void gdbsim_close PARAMS ((int quitting)); | |
80 | ||
81 | static void gdbsim_detach PARAMS ((char *args, int from_tty)); | |
82 | ||
83 | static void gdbsim_resume PARAMS ((int pid, int step, enum target_signal siggnal)); | |
84 | ||
85 | static int gdbsim_wait PARAMS ((int pid, struct target_waitstatus *status)); | |
86 | ||
87 | static void gdbsim_prepare_to_store PARAMS ((void)); | |
88 | ||
89 | static int gdbsim_xfer_inferior_memory PARAMS ((CORE_ADDR memaddr, | |
90 | char *myaddr, int len, | |
91 | int write, | |
92 | struct target_ops *target)); | |
93 | ||
94 | static void gdbsim_files_info PARAMS ((struct target_ops *target)); | |
95 | ||
96 | static void gdbsim_mourn_inferior PARAMS ((void)); | |
97 | ||
8517f62b AC |
98 | static void gdbsim_stop PARAMS ((void)); |
99 | ||
8501c742 SG |
100 | static void simulator_command PARAMS ((char *args, int from_tty)); |
101 | ||
40b92220 JK |
102 | /* Naming convention: |
103 | ||
104 | sim_* are the interface to the simulator (see remote-sim.h). | |
40b92220 | 105 | gdbsim_* are stuff which is internal to gdb. */ |
ec25d19b SC |
106 | |
107 | /* Forward data declarations */ | |
40b92220 | 108 | extern struct target_ops gdbsim_ops; |
ec25d19b | 109 | |
40b92220 JK |
110 | static int program_loaded = 0; |
111 | ||
d9ad8adf DE |
112 | /* We must keep track of whether the simulator has been opened or not because |
113 | GDB can call a target's close routine twice, but sim_close doesn't allow | |
286f83b4 DE |
114 | this. We also need to record the result of sim_open so we can pass it |
115 | back to the other sim_foo routines. */ | |
116 | static SIM_DESC gdbsim_desc = 0; | |
d9ad8adf | 117 | |
40b92220 JK |
118 | static void |
119 | dump_mem (buf, len) | |
120 | char *buf; | |
ec25d19b SC |
121 | int len; |
122 | { | |
40b92220 JK |
123 | if (len <= 8) |
124 | { | |
125 | if (len == 8 || len == 4) | |
126 | { | |
127 | long l[2]; | |
128 | memcpy (l, buf, len); | |
129 | printf_filtered ("\t0x%x", l[0]); | |
130 | printf_filtered (len == 8 ? " 0x%x\n" : "\n", l[1]); | |
131 | } | |
132 | else | |
133 | { | |
134 | int i; | |
135 | printf_filtered ("\t"); | |
136 | for (i = 0; i < len; i++) | |
137 | printf_filtered ("0x%x ", buf[i]); | |
138 | printf_filtered ("\n"); | |
139 | } | |
140 | } | |
141 | } | |
142 | ||
4da8b2a5 DE |
143 | static host_callback gdb_callback; |
144 | static int callbacks_initialized = 0; | |
145 | ||
146 | /* Initialize gdb_callback. */ | |
147 | ||
148 | static void | |
149 | init_callbacks () | |
150 | { | |
151 | if (! callbacks_initialized) | |
152 | { | |
153 | gdb_callback = default_callback; | |
163a75af DE |
154 | gdb_callback.init (&gdb_callback); |
155 | gdb_callback.write_stdout = gdb_os_write_stdout; | |
48ae8057 AC |
156 | gdb_callback.flush_stdout = gdb_os_flush_stdout; |
157 | gdb_callback.write_stderr = gdb_os_write_stderr; | |
158 | gdb_callback.flush_stderr = gdb_os_flush_stderr; | |
163a75af | 159 | gdb_callback.printf_filtered = gdb_os_printf_filtered; |
48ae8057 AC |
160 | gdb_callback.vprintf_filtered = gdb_os_vprintf_filtered; |
161 | gdb_callback.evprintf_filtered = gdb_os_evprintf_filtered; | |
1387cba1 | 162 | gdb_callback.error = gdb_os_error; |
8517f62b AC |
163 | gdb_callback.poll_quit = gdb_os_poll_quit; |
164 | gdb_callback.magic = HOST_CALLBACK_MAGIC; | |
4da8b2a5 DE |
165 | callbacks_initialized = 1; |
166 | } | |
167 | } | |
168 | ||
169 | /* Release callbacks (free resources used by them). */ | |
170 | ||
171 | static void | |
172 | end_callbacks () | |
173 | { | |
174 | if (callbacks_initialized) | |
175 | { | |
176 | gdb_callback.shutdown (&gdb_callback); | |
177 | callbacks_initialized = 0; | |
178 | } | |
179 | } | |
180 | ||
181 | /* GDB version of os_write_stdout callback. */ | |
182 | ||
183 | static int | |
184 | gdb_os_write_stdout (p, buf, len) | |
185 | host_callback *p; | |
186 | const char *buf; | |
187 | int len; | |
188 | { | |
189 | int i; | |
190 | char b[2]; | |
191 | ||
192 | for (i = 0; i < len; i++) | |
193 | { | |
194 | b[0] = buf[i]; | |
195 | b[1] = 0; | |
196 | if (target_output_hook) | |
197 | target_output_hook (b); | |
198 | else | |
199 | fputs_filtered (b, gdb_stdout); | |
200 | } | |
201 | return len; | |
202 | } | |
203 | ||
48ae8057 AC |
204 | /* GDB version of os_flush_stdout callback. */ |
205 | ||
206 | static void | |
207 | gdb_os_flush_stdout (p) | |
208 | host_callback *p; | |
209 | { | |
210 | gdb_flush (gdb_stdout); | |
211 | } | |
212 | ||
213 | /* GDB version of os_write_stderr callback. */ | |
214 | ||
215 | static int | |
216 | gdb_os_write_stderr (p, buf, len) | |
217 | host_callback *p; | |
218 | const char *buf; | |
219 | int len; | |
220 | { | |
221 | int i; | |
222 | char b[2]; | |
223 | ||
224 | for (i = 0; i < len; i++) | |
225 | { | |
226 | b[0] = buf[i]; | |
227 | b[1] = 0; | |
228 | if (target_output_hook) | |
229 | target_output_hook (b); | |
230 | else | |
231 | fputs_filtered (b, gdb_stderr); | |
232 | } | |
233 | return len; | |
234 | } | |
235 | ||
236 | /* GDB version of os_flush_stderr callback. */ | |
237 | ||
238 | static void | |
239 | gdb_os_flush_stderr (p) | |
240 | host_callback *p; | |
241 | { | |
242 | gdb_flush (gdb_stderr); | |
243 | } | |
244 | ||
4da8b2a5 DE |
245 | /* GDB version of printf_filtered callback. */ |
246 | ||
247 | /* VARARGS */ | |
248 | static void | |
249 | #ifdef ANSI_PROTOTYPES | |
250 | gdb_os_printf_filtered (host_callback *p, const char *format, ...) | |
251 | #else | |
252 | gdb_os_printf_filtered (p, va_alist) | |
253 | host_callback *p; | |
254 | va_dcl | |
255 | #endif | |
256 | { | |
257 | va_list args; | |
258 | #ifdef ANSI_PROTOTYPES | |
259 | va_start (args, format); | |
260 | #else | |
261 | char *format; | |
262 | ||
263 | va_start (args); | |
264 | format = va_arg (args, char *); | |
265 | #endif | |
266 | ||
163a75af | 267 | vfprintf_filtered (gdb_stdout, format, args); |
4da8b2a5 DE |
268 | |
269 | va_end (args); | |
270 | } | |
271 | ||
48ae8057 AC |
272 | /* GDB version of error vprintf_filtered. */ |
273 | ||
274 | /* VARARGS */ | |
275 | static void | |
276 | #ifdef ANSI_PROTOTYPES | |
8902803f | 277 | gdb_os_vprintf_filtered (host_callback *p, const char *format, va_list ap) |
48ae8057 | 278 | #else |
011fa671 | 279 | gdb_os_vprintf_filtered (p, format, ap) |
48ae8057 | 280 | host_callback *p; |
011fa671 | 281 | char *format; |
8902803f | 282 | va_list ap; |
48ae8057 AC |
283 | #endif |
284 | { | |
8902803f | 285 | vfprintf_filtered (gdb_stdout, format, ap); |
48ae8057 AC |
286 | } |
287 | ||
288 | /* GDB version of error evprintf_filtered. */ | |
289 | ||
290 | /* VARARGS */ | |
291 | static void | |
292 | #ifdef ANSI_PROTOTYPES | |
8902803f | 293 | gdb_os_evprintf_filtered (host_callback *p, const char *format, va_list ap) |
48ae8057 | 294 | #else |
011fa671 | 295 | gdb_os_evprintf_filtered (p, format, ap) |
48ae8057 | 296 | host_callback *p; |
011fa671 | 297 | char *format; |
8902803f | 298 | va_list ap; |
48ae8057 AC |
299 | #endif |
300 | { | |
8902803f | 301 | vfprintf_filtered (gdb_stderr, format, ap); |
48ae8057 AC |
302 | } |
303 | ||
163a75af DE |
304 | /* GDB version of error callback. */ |
305 | ||
306 | /* VARARGS */ | |
307 | static void | |
308 | #ifdef ANSI_PROTOTYPES | |
309 | gdb_os_error (host_callback *p, const char *format, ...) | |
310 | #else | |
311 | gdb_os_error (p, va_alist) | |
312 | host_callback *p; | |
313 | va_dcl | |
314 | #endif | |
315 | { | |
316 | if (error_hook) | |
317 | (*error_hook) (); | |
318 | else | |
319 | { | |
320 | va_list args; | |
321 | #ifdef ANSI_PROTOTYPES | |
322 | va_start (args, format); | |
323 | #else | |
324 | char *format; | |
325 | ||
326 | va_start (args); | |
327 | format = va_arg (args, char *); | |
328 | #endif | |
329 | ||
330 | error_begin (); | |
331 | vfprintf_filtered (gdb_stderr, format, args); | |
332 | fprintf_filtered (gdb_stderr, "\n"); | |
333 | va_end (args); | |
334 | return_to_top_level (RETURN_ERROR); | |
335 | } | |
336 | } | |
337 | ||
40b92220 JK |
338 | static void |
339 | gdbsim_fetch_register (regno) | |
340 | int regno; | |
341 | { | |
342 | if (regno == -1) | |
343 | { | |
344 | for (regno = 0; regno < NUM_REGS; regno++) | |
345 | gdbsim_fetch_register (regno); | |
346 | } | |
347 | else | |
348 | { | |
349 | char buf[MAX_REGISTER_RAW_SIZE]; | |
350 | ||
286f83b4 | 351 | sim_fetch_register (gdbsim_desc, regno, buf); |
40b92220 JK |
352 | supply_register (regno, buf); |
353 | if (sr_get_debug ()) | |
354 | { | |
355 | printf_filtered ("gdbsim_fetch_register: %d", regno); | |
356 | /* FIXME: We could print something more intelligible. */ | |
357 | dump_mem (buf, REGISTER_RAW_SIZE (regno)); | |
358 | } | |
359 | } | |
ec25d19b SC |
360 | } |
361 | ||
6b009ef6 | 362 | |
a944e79a | 363 | static void |
40b92220 | 364 | gdbsim_store_register (regno) |
ec25d19b SC |
365 | int regno; |
366 | { | |
367 | if (regno == -1) | |
40b92220 JK |
368 | { |
369 | for (regno = 0; regno < NUM_REGS; regno++) | |
370 | gdbsim_store_register (regno); | |
371 | } | |
372 | else | |
373 | { | |
374 | /* FIXME: Until read_register() returns LONGEST, we have this. */ | |
3beff94e SC |
375 | char tmp[MAX_REGISTER_RAW_SIZE]; |
376 | read_register_gen (regno, tmp); | |
286f83b4 | 377 | sim_store_register (gdbsim_desc, regno, tmp); |
40b92220 JK |
378 | if (sr_get_debug ()) |
379 | { | |
380 | printf_filtered ("gdbsim_store_register: %d", regno); | |
381 | /* FIXME: We could print something more intelligible. */ | |
3beff94e | 382 | dump_mem (tmp, REGISTER_RAW_SIZE (regno)); |
40b92220 JK |
383 | } |
384 | } | |
ec25d19b SC |
385 | } |
386 | ||
47424e79 DE |
387 | /* Kill the running program. This may involve closing any open files |
388 | and releasing other resources acquired by the simulated program. */ | |
389 | ||
40b92220 JK |
390 | static void |
391 | gdbsim_kill () | |
392 | { | |
393 | if (sr_get_debug ()) | |
394 | printf_filtered ("gdbsim_kill\n"); | |
395 | ||
aa02a0b0 AC |
396 | /* There is no need to `kill' running simulator - the simulator is |
397 | not running */ | |
40b92220 JK |
398 | inferior_pid = 0; |
399 | } | |
400 | ||
401 | /* Load an executable file into the target process. This is expected to | |
402 | not only bring new code into the target process, but also to update | |
403 | GDB's symbol tables to match. */ | |
ec25d19b | 404 | |
ec25d19b | 405 | static void |
40b92220 JK |
406 | gdbsim_load (prog, fromtty) |
407 | char *prog; | |
408 | int fromtty; | |
ec25d19b | 409 | { |
40b92220 JK |
410 | if (sr_get_debug ()) |
411 | printf_filtered ("gdbsim_load: prog \"%s\"\n", prog); | |
ec25d19b | 412 | |
47424e79 DE |
413 | inferior_pid = 0; |
414 | ||
44cd79e4 DE |
415 | /* FIXME: We will print two messages on error. |
416 | Need error to either not print anything if passed NULL or need | |
417 | another routine that doesn't take any arguments. */ | |
418 | if (sim_load (gdbsim_desc, prog, NULL, fromtty) == SIM_RC_FAIL) | |
419 | error ("unable to load program"); | |
47424e79 | 420 | |
fafce69a AC |
421 | /* FIXME: If a load command should reset the targets registers then |
422 | a call to sim_create_inferior() should go here. */ | |
423 | ||
44cd79e4 | 424 | program_loaded = 1; |
40b92220 JK |
425 | } |
426 | ||
ec25d19b | 427 | |
40b92220 JK |
428 | /* Start an inferior process and set inferior_pid to its pid. |
429 | EXEC_FILE is the file to run. | |
163a75af | 430 | ARGS is a string containing the arguments to the program. |
40b92220 JK |
431 | ENV is the environment vector to pass. Errors reported with error(). |
432 | On VxWorks and various standalone systems, we ignore exec_file. */ | |
ec25d19b SC |
433 | /* This is called not only when we first attach, but also when the |
434 | user types "run" after having attached. */ | |
40b92220 JK |
435 | |
436 | static void | |
437 | gdbsim_create_inferior (exec_file, args, env) | |
438 | char *exec_file; | |
ec25d19b SC |
439 | char *args; |
440 | char **env; | |
441 | { | |
47424e79 | 442 | int len; |
40b92220 | 443 | char *arg_buf,**argv; |
ec25d19b | 444 | |
fafce69a AC |
445 | if (exec_file == 0 || exec_bfd == 0) |
446 | warning ("No exec file specified."); | |
40b92220 | 447 | if (! program_loaded) |
fafce69a | 448 | warning ("No program loaded."); |
ec25d19b | 449 | |
40b92220 JK |
450 | if (sr_get_debug ()) |
451 | printf_filtered ("gdbsim_create_inferior: exec_file \"%s\", args \"%s\"\n", | |
fafce69a AC |
452 | (exec_file ? exec_file: "(NULL)"), |
453 | args); | |
40b92220 | 454 | |
8501c742 | 455 | gdbsim_kill (); |
40b92220 | 456 | remove_breakpoints (); |
ec25d19b | 457 | init_wait_for_inferior (); |
ec25d19b | 458 | |
fafce69a AC |
459 | if (exec_file != NULL) |
460 | { | |
461 | len = strlen (exec_file) + 1 + strlen (args) + 1 + /*slop*/ 10; | |
462 | arg_buf = (char *) alloca (len); | |
463 | arg_buf[0] = '\0'; | |
464 | strcat (arg_buf, exec_file); | |
465 | strcat (arg_buf, " "); | |
466 | strcat (arg_buf, args); | |
467 | argv = buildargv (arg_buf); | |
468 | make_cleanup (freeargv, (char *) argv); | |
469 | } | |
470 | else | |
471 | argv = NULL; | |
472 | sim_create_inferior (gdbsim_desc, exec_bfd, argv, env); | |
40b92220 JK |
473 | |
474 | inferior_pid = 42; | |
fafce69a AC |
475 | insert_breakpoints (); /* Needed to get correct instruction in cache */ |
476 | ||
477 | /* NB: Entry point already set by sim_create_inferior. */ | |
478 | proceed ((CORE_ADDR)-1, TARGET_SIGNAL_DEFAULT, 0); | |
40b92220 | 479 | } |
ec25d19b | 480 | |
40b92220 JK |
481 | /* The open routine takes the rest of the parameters from the command, |
482 | and (if successful) pushes a new target onto the stack. | |
483 | Targets should supply this routine, if only to provide an error message. */ | |
484 | /* Called when selecting the simulator. EG: (gdb) target sim name. */ | |
ec25d19b | 485 | |
a944e79a | 486 | static void |
40b92220 JK |
487 | gdbsim_open (args, from_tty) |
488 | char *args; | |
ec25d19b SC |
489 | int from_tty; |
490 | { | |
286f83b4 DE |
491 | int len; |
492 | char *arg_buf; | |
493 | char **argv; | |
494 | ||
40b92220 | 495 | if (sr_get_debug ()) |
47424e79 | 496 | printf_filtered ("gdbsim_open: args \"%s\"\n", args ? args : "(null)"); |
7a29d686 | 497 | |
d9ad8adf DE |
498 | /* Remove current simulator if one exists. Only do this if the simulator |
499 | has been opened because sim_close requires it. | |
500 | This is important because the call to push_target below will cause | |
501 | sim_close to be called if the simulator is already open, but push_target | |
502 | is called after sim_open! We can't move the call to push_target before | |
503 | the call to sim_open because sim_open may invoke `error'. */ | |
286f83b4 | 504 | if (gdbsim_desc != NULL) |
d9ad8adf DE |
505 | unpush_target (&gdbsim_ops); |
506 | ||
d0aba53f AC |
507 | len = (7 + 1 /* gdbsim */ |
508 | + strlen (" -E little") | |
509 | + strlen (" --arch=xxxxxxxxxx") | |
510 | + (args ? strlen (args) : 0) | |
511 | + 50) /* slack */; | |
286f83b4 | 512 | arg_buf = (char *) alloca (len); |
750b7942 AC |
513 | strcpy (arg_buf, "gdbsim"); /* 7 */ |
514 | /* Specify the byte order for the target when it is both selectable | |
515 | and explicitly specified by the user (not auto detected). */ | |
0c4cec9f | 516 | #ifdef TARGET_BYTE_ORDER_SELECTABLE |
750b7942 AC |
517 | if (!target_byte_order_auto) |
518 | { | |
519 | switch (TARGET_BYTE_ORDER) | |
520 | { | |
521 | case BIG_ENDIAN: | |
522 | strcat (arg_buf, " -E big"); | |
523 | break; | |
524 | case LITTLE_ENDIAN: | |
525 | strcat (arg_buf, " -E little"); | |
526 | break; | |
527 | default: | |
528 | fatal ("Value of TARGET_BYTE_ORDER unknown"); | |
529 | } | |
530 | } | |
0c4cec9f | 531 | #endif |
d0aba53f AC |
532 | /* Specify the architecture of the target when it has been |
533 | explicitly specified */ | |
534 | if (!target_architecture_auto) | |
535 | { | |
536 | strcat (arg_buf, " --arch="); | |
537 | strcat (arg_buf, target_architecture->printable_name); | |
538 | } | |
750b7942 AC |
539 | /* finally, any explicit args */ |
540 | if (args) | |
541 | { | |
542 | strcat (arg_buf, " "); /* 1 */ | |
543 | strcat (arg_buf, args); | |
544 | } | |
286f83b4 DE |
545 | argv = buildargv (arg_buf); |
546 | if (argv == NULL) | |
547 | error ("Insufficient memory available to allocate simulator arg list."); | |
548 | make_cleanup (freeargv, (char *) argv); | |
549 | ||
24aa2b57 | 550 | init_callbacks (); |
247fccde | 551 | gdbsim_desc = sim_open (SIM_OPEN_DEBUG, &gdb_callback, exec_bfd, argv); |
24aa2b57 | 552 | |
99097077 DE |
553 | if (gdbsim_desc == 0) |
554 | error ("unable to create simulator instance"); | |
3e38efa0 | 555 | |
40b92220 JK |
556 | push_target (&gdbsim_ops); |
557 | target_fetch_registers (-1); | |
40b92220 | 558 | printf_filtered ("Connected to the simulator.\n"); |
ec25d19b SC |
559 | } |
560 | ||
40b92220 JK |
561 | /* Does whatever cleanup is required for a target that we are no longer |
562 | going to be calling. Argument says whether we are quitting gdb and | |
563 | should not get hung in case of errors, or whether we want a clean | |
564 | termination even if it takes a while. This routine is automatically | |
565 | always called just before a routine is popped off the target stack. | |
566 | Closing file descriptors and freeing memory are typical things it should | |
567 | do. */ | |
ec25d19b SC |
568 | /* Close out all files and local state before this target loses control. */ |
569 | ||
a944e79a | 570 | static void |
40b92220 | 571 | gdbsim_close (quitting) |
ec25d19b SC |
572 | int quitting; |
573 | { | |
40b92220 JK |
574 | if (sr_get_debug ()) |
575 | printf_filtered ("gdbsim_close: quitting %d\n", quitting); | |
576 | ||
577 | program_loaded = 0; | |
578 | ||
286f83b4 | 579 | if (gdbsim_desc != NULL) |
d9ad8adf | 580 | { |
286f83b4 DE |
581 | sim_close (gdbsim_desc, quitting); |
582 | gdbsim_desc = NULL; | |
d9ad8adf | 583 | } |
4da8b2a5 DE |
584 | |
585 | end_callbacks (); | |
ec25d19b SC |
586 | } |
587 | ||
40b92220 JK |
588 | /* Takes a program previously attached to and detaches it. |
589 | The program may resume execution (some targets do, some don't) and will | |
590 | no longer stop on signals, etc. We better not have left any breakpoints | |
591 | in the program or it'll die when it hits one. ARGS is arguments | |
592 | typed by the user (e.g. a signal to send the process). FROM_TTY | |
593 | says whether to be verbose or not. */ | |
ec25d19b | 594 | /* Terminate the open connection to the remote debugger. |
40b92220 JK |
595 | Use this when you want to detach and do something else with your gdb. */ |
596 | ||
597 | static void | |
598 | gdbsim_detach (args,from_tty) | |
ec25d19b SC |
599 | char *args; |
600 | int from_tty; | |
601 | { | |
40b92220 JK |
602 | if (sr_get_debug ()) |
603 | printf_filtered ("gdbsim_detach: args \"%s\"\n", args); | |
a944e79a | 604 | |
40b92220 JK |
605 | pop_target (); /* calls gdbsim_close to do the real work */ |
606 | if (from_tty) | |
607 | printf_filtered ("Ending simulator %s debugging\n", target_shortname); | |
ec25d19b SC |
608 | } |
609 | ||
40b92220 JK |
610 | /* Resume execution of the target process. STEP says whether to single-step |
611 | or to run free; SIGGNAL is the signal value (e.g. SIGINT) to be given | |
612 | to the target, or zero for no signal. */ | |
613 | ||
8517f62b AC |
614 | static enum target_signal resume_siggnal; |
615 | static int resume_step; | |
616 | ||
40b92220 JK |
617 | static void |
618 | gdbsim_resume (pid, step, siggnal) | |
67ac9759 JK |
619 | int pid, step; |
620 | enum target_signal siggnal; | |
40b92220 | 621 | { |
6bafbdfb JL |
622 | if (inferior_pid != 42) |
623 | error ("The program is not being run."); | |
624 | ||
40b92220 JK |
625 | if (sr_get_debug ()) |
626 | printf_filtered ("gdbsim_resume: step %d, signal %d\n", step, siggnal); | |
ec25d19b | 627 | |
8517f62b AC |
628 | resume_siggnal = siggnal; |
629 | resume_step = step; | |
630 | } | |
631 | ||
632 | /* Notify the simulator of an asynchronous request to stop. | |
c14cabba AC |
633 | |
634 | The simulator shall ensure that the stop request is eventually | |
635 | delivered to the simulator. If the call is made while the | |
636 | simulator is not running then the stop request is processed when | |
637 | the simulator is next resumed. | |
638 | ||
639 | For simulators that do not support this operation, just abort */ | |
8517f62b AC |
640 | |
641 | static void | |
642 | gdbsim_stop () | |
643 | { | |
644 | if (! sim_stop (gdbsim_desc)) | |
645 | { | |
c14cabba | 646 | quit (); |
8517f62b | 647 | } |
40b92220 | 648 | } |
ec25d19b | 649 | |
c14cabba AC |
650 | /* GDB version of os_poll_quit callback. |
651 | Taken from gdb/util.c - should be in a library */ | |
652 | ||
653 | static int | |
654 | gdb_os_poll_quit (p) | |
655 | host_callback *p; | |
656 | { | |
657 | notice_quit (); | |
658 | if (quit_flag) /* gdb's idea of quit */ | |
659 | { | |
660 | quit_flag = 0; /* we've stolen it */ | |
661 | return 1; | |
662 | } | |
663 | else if (immediate_quit) | |
664 | { | |
665 | return 1; | |
666 | } | |
667 | return 0; | |
668 | } | |
669 | ||
40b92220 JK |
670 | /* Wait for inferior process to do something. Return pid of child, |
671 | or -1 in case of error; store status through argument pointer STATUS, | |
8517f62b AC |
672 | just as `wait' would. */ |
673 | ||
8517f62b AC |
674 | static void |
675 | gdbsim_cntrl_c (int signo) | |
676 | { | |
677 | gdbsim_stop (); | |
678 | } | |
ec25d19b | 679 | |
40b92220 | 680 | static int |
de43d7d0 SG |
681 | gdbsim_wait (pid, status) |
682 | int pid; | |
67ac9759 | 683 | struct target_waitstatus *status; |
ec25d19b | 684 | { |
c14cabba | 685 | static RETSIGTYPE (*prev_sigint) (); |
8517f62b AC |
686 | int sigrc = 0; |
687 | enum sim_stop reason = sim_running; | |
592f517a | 688 | |
40b92220 | 689 | if (sr_get_debug ()) |
67ac9759 JK |
690 | printf_filtered ("gdbsim_wait\n"); |
691 | ||
8517f62b AC |
692 | prev_sigint = signal (SIGINT, gdbsim_cntrl_c); |
693 | sim_resume (gdbsim_desc, resume_step, | |
694 | target_signal_to_host (resume_siggnal)); | |
695 | signal (SIGINT, prev_sigint); | |
696 | resume_step = 0; | |
697 | ||
286f83b4 | 698 | sim_stop_reason (gdbsim_desc, &reason, &sigrc); |
8517f62b | 699 | |
67ac9759 JK |
700 | switch (reason) |
701 | { | |
702 | case sim_exited: | |
703 | status->kind = TARGET_WAITKIND_EXITED; | |
704 | status->value.integer = sigrc; | |
705 | break; | |
706 | case sim_stopped: | |
8517f62b AC |
707 | switch (sigrc) |
708 | { | |
709 | case SIGABRT: | |
710 | quit (); | |
711 | break; | |
712 | case SIGINT: | |
713 | case SIGTRAP: | |
714 | default: | |
715 | status->kind = TARGET_WAITKIND_STOPPED; | |
716 | /* The signal in sigrc is a host signal. That probably | |
717 | should be fixed. */ | |
718 | status->value.sig = target_signal_from_host (sigrc); | |
719 | break; | |
720 | } | |
67ac9759 JK |
721 | break; |
722 | case sim_signalled: | |
723 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
724 | /* The signal in sigrc is a host signal. That probably | |
725 | should be fixed. */ | |
726 | status->value.sig = target_signal_from_host (sigrc); | |
727 | break; | |
40b647e9 FF |
728 | case sim_running: |
729 | case sim_polling: | |
730 | /* FIXME: Is this correct? */ | |
731 | break; | |
67ac9759 JK |
732 | } |
733 | ||
3f0184ac | 734 | return inferior_pid; |
ec25d19b SC |
735 | } |
736 | ||
40b92220 JK |
737 | /* Get ready to modify the registers array. On machines which store |
738 | individual registers, this doesn't need to do anything. On machines | |
739 | which store all the registers in one fell swoop, this makes sure | |
740 | that registers contains all the registers from the program being | |
741 | debugged. */ | |
742 | ||
ec25d19b | 743 | static void |
40b92220 | 744 | gdbsim_prepare_to_store () |
ec25d19b | 745 | { |
40b92220 | 746 | /* Do nothing, since we can store individual regs */ |
ec25d19b SC |
747 | } |
748 | ||
40b92220 JK |
749 | static int |
750 | gdbsim_xfer_inferior_memory (memaddr, myaddr, len, write, target) | |
ec25d19b SC |
751 | CORE_ADDR memaddr; |
752 | char *myaddr; | |
753 | int len; | |
754 | int write; | |
755 | struct target_ops *target; /* ignored */ | |
756 | { | |
40b92220 JK |
757 | if (! program_loaded) |
758 | error ("No program loaded."); | |
759 | ||
760 | if (sr_get_debug ()) | |
761 | { | |
762 | printf_filtered ("gdbsim_xfer_inferior_memory: myaddr 0x%x, memaddr 0x%x, len %d, write %d\n", | |
763 | myaddr, memaddr, len, write); | |
764 | if (sr_get_debug () && write) | |
765 | dump_mem(myaddr, len); | |
766 | } | |
767 | ||
ec25d19b | 768 | if (write) |
40b92220 | 769 | { |
286f83b4 | 770 | len = sim_write (gdbsim_desc, memaddr, myaddr, len); |
40b92220 | 771 | } |
ec25d19b | 772 | else |
40b92220 | 773 | { |
286f83b4 | 774 | len = sim_read (gdbsim_desc, memaddr, myaddr, len); |
40b92220 JK |
775 | if (sr_get_debug () && len > 0) |
776 | dump_mem(myaddr, len); | |
777 | } | |
ec25d19b SC |
778 | return len; |
779 | } | |
780 | ||
40b92220 JK |
781 | static void |
782 | gdbsim_files_info (target) | |
783 | struct target_ops *target; | |
784 | { | |
785 | char *file = "nothing"; | |
ec25d19b | 786 | |
40b92220 JK |
787 | if (exec_bfd) |
788 | file = bfd_get_filename (exec_bfd); | |
ec25d19b | 789 | |
40b92220 JK |
790 | if (sr_get_debug ()) |
791 | printf_filtered ("gdbsim_files_info: file \"%s\"\n", file); | |
792 | ||
793 | if (exec_bfd) | |
794 | { | |
795 | printf_filtered ("\tAttached to %s running program %s\n", | |
796 | target_shortname, file); | |
286f83b4 | 797 | sim_info (gdbsim_desc, 0); |
40b92220 | 798 | } |
ec25d19b SC |
799 | } |
800 | ||
fb506180 | 801 | /* Clear the simulator's notion of what the break points are. */ |
ec25d19b | 802 | |
40b92220 JK |
803 | static void |
804 | gdbsim_mourn_inferior () | |
805 | { | |
806 | if (sr_get_debug ()) | |
807 | printf_filtered ("gdbsim_mourn_inferior:\n"); | |
ec25d19b | 808 | |
40b92220 JK |
809 | remove_breakpoints (); |
810 | generic_mourn_inferior (); | |
ec25d19b | 811 | } |
40b92220 | 812 | |
07997f65 SS |
813 | /* Pass the command argument through to the simulator verbatim. The |
814 | simulator must do any command interpretation work. */ | |
ec25d19b | 815 | |
fb506180 SS |
816 | static void |
817 | simulator_command (args, from_tty) | |
818 | char *args; | |
819 | int from_tty; | |
ec25d19b | 820 | { |
1fa0cc2d AC |
821 | if (gdbsim_desc == NULL) |
822 | { | |
823 | ||
824 | /* PREVIOUSLY: The user may give a command before the simulator | |
825 | is opened. [...] (??? assuming of course one wishes to | |
826 | continue to allow commands to be sent to unopened simulators, | |
827 | which isn't entirely unreasonable). */ | |
828 | ||
829 | /* The simulator is a builtin abstraction of a remote target. | |
830 | Consistent with that model, access to the simulator, via sim | |
831 | commands, is restricted to the period when the channel to the | |
832 | simulator is open. */ | |
833 | ||
834 | error ("Not connected to the simulator target"); | |
835 | } | |
07997f65 | 836 | |
286f83b4 | 837 | sim_do_command (gdbsim_desc, args); |
fb506180 SS |
838 | } |
839 | ||
840 | /* Define the target subroutine names */ | |
841 | ||
842 | struct target_ops gdbsim_ops = { | |
843 | "sim", /* to_shortname */ | |
844 | "simulator", /* to_longname */ | |
845 | "Use the compiled-in simulator.", /* to_doc */ | |
846 | gdbsim_open, /* to_open */ | |
847 | gdbsim_close, /* to_close */ | |
848 | NULL, /* to_attach */ | |
849 | gdbsim_detach, /* to_detach */ | |
850 | gdbsim_resume, /* to_resume */ | |
851 | gdbsim_wait, /* to_wait */ | |
852 | gdbsim_fetch_register, /* to_fetch_registers */ | |
853 | gdbsim_store_register, /* to_store_registers */ | |
854 | gdbsim_prepare_to_store, /* to_prepare_to_store */ | |
855 | gdbsim_xfer_inferior_memory, /* to_xfer_memory */ | |
856 | gdbsim_files_info, /* to_files_info */ | |
857 | memory_insert_breakpoint, /* to_insert_breakpoint */ | |
858 | memory_remove_breakpoint, /* to_remove_breakpoint */ | |
859 | NULL, /* to_terminal_init */ | |
860 | NULL, /* to_terminal_inferior */ | |
861 | NULL, /* to_terminal_ours_for_output */ | |
862 | NULL, /* to_terminal_ours */ | |
863 | NULL, /* to_terminal_info */ | |
864 | gdbsim_kill, /* to_kill */ | |
865 | gdbsim_load, /* to_load */ | |
866 | NULL, /* to_lookup_symbol */ | |
867 | gdbsim_create_inferior, /* to_create_inferior */ | |
868 | gdbsim_mourn_inferior, /* to_mourn_inferior */ | |
869 | 0, /* to_can_run */ | |
870 | 0, /* to_notice_signals */ | |
43fc25c8 | 871 | 0, /* to_thread_alive */ |
8517f62b | 872 | gdbsim_stop, /* to_stop */ |
fb506180 SS |
873 | process_stratum, /* to_stratum */ |
874 | NULL, /* to_next */ | |
875 | 1, /* to_has_all_memory */ | |
876 | 1, /* to_has_memory */ | |
877 | 1, /* to_has_stack */ | |
878 | 1, /* to_has_registers */ | |
879 | 1, /* to_has_execution */ | |
880 | NULL, /* sections */ | |
881 | NULL, /* sections_end */ | |
882 | OPS_MAGIC, /* to_magic */ | |
ec25d19b SC |
883 | }; |
884 | ||
ec25d19b SC |
885 | void |
886 | _initialize_remote_sim () | |
887 | { | |
40b92220 | 888 | add_target (&gdbsim_ops); |
fb506180 SS |
889 | |
890 | add_com ("sim <command>", class_obscure, simulator_command, | |
891 | "Send a command to the simulator."); | |
ec25d19b | 892 | } |