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c906108c SS |
1 | /* Generic remote debugging interface for simulators. |
2 | Copyright 1993, 1994, 1996, 1997 Free Software Foundation, Inc. | |
3 | Contributed by Cygnus Support. | |
4 | Steve Chamberlain (sac@cygnus.com). | |
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 | |
20 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
21 | ||
22 | #include "defs.h" | |
23 | #include "inferior.h" | |
24 | #include "wait.h" | |
25 | #include "value.h" | |
26 | #include "gdb_string.h" | |
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" | |
35 | #include "callback.h" | |
36 | #include "remote-sim.h" | |
37 | #include "remote-utils.h" | |
38 | #include "command.h" | |
39 | ||
40 | /* Prototypes */ | |
41 | ||
392a587b JM |
42 | extern void _initialize_remote_sim PARAMS ((void)); |
43 | ||
7a292a7a SS |
44 | extern int (*ui_loop_hook) PARAMS ((int signo)); |
45 | ||
c906108c SS |
46 | static void dump_mem PARAMS ((char *buf, int len)); |
47 | ||
48 | static void init_callbacks PARAMS ((void)); | |
49 | ||
50 | static void end_callbacks PARAMS ((void)); | |
51 | ||
52 | static int gdb_os_write_stdout PARAMS ((host_callback *, const char *, int)); | |
53 | ||
54 | static void gdb_os_flush_stdout PARAMS ((host_callback *)); | |
55 | ||
56 | static int gdb_os_write_stderr PARAMS ((host_callback *, const char *, int)); | |
57 | ||
58 | static void gdb_os_flush_stderr PARAMS ((host_callback *)); | |
59 | ||
60 | static int gdb_os_poll_quit PARAMS ((host_callback *)); | |
61 | ||
62 | /* printf_filtered is depreciated */ | |
63 | static void gdb_os_printf_filtered PARAMS ((host_callback *, const char *, ...)); | |
64 | ||
65 | static void gdb_os_vprintf_filtered PARAMS ((host_callback *, const char *, va_list)); | |
66 | ||
67 | static void gdb_os_evprintf_filtered PARAMS ((host_callback *, const char *, va_list)); | |
68 | ||
69 | static void gdb_os_error PARAMS ((host_callback *, const char *, ...)); | |
70 | ||
71 | static void gdbsim_fetch_register PARAMS ((int regno)); | |
72 | ||
73 | static void gdbsim_store_register PARAMS ((int regno)); | |
74 | ||
75 | static void gdbsim_kill PARAMS ((void)); | |
76 | ||
77 | static void gdbsim_load PARAMS ((char *prog, int fromtty)); | |
78 | ||
79 | static void gdbsim_create_inferior PARAMS ((char *exec_file, char *args, char **env)); | |
80 | ||
81 | static void gdbsim_open PARAMS ((char *args, int from_tty)); | |
82 | ||
83 | static void gdbsim_close PARAMS ((int quitting)); | |
84 | ||
85 | static void gdbsim_detach PARAMS ((char *args, int from_tty)); | |
86 | ||
87 | static void gdbsim_resume PARAMS ((int pid, int step, enum target_signal siggnal)); | |
88 | ||
89 | static int gdbsim_wait PARAMS ((int pid, struct target_waitstatus *status)); | |
90 | ||
91 | static void gdbsim_prepare_to_store PARAMS ((void)); | |
92 | ||
93 | static int gdbsim_xfer_inferior_memory PARAMS ((CORE_ADDR memaddr, | |
94 | char *myaddr, int len, | |
95 | int write, | |
96 | struct target_ops *target)); | |
97 | ||
98 | static void gdbsim_files_info PARAMS ((struct target_ops *target)); | |
99 | ||
100 | static void gdbsim_mourn_inferior PARAMS ((void)); | |
101 | ||
102 | static void gdbsim_stop PARAMS ((void)); | |
103 | ||
104 | void simulator_command PARAMS ((char *args, int from_tty)); | |
105 | ||
106 | /* Naming convention: | |
107 | ||
108 | sim_* are the interface to the simulator (see remote-sim.h). | |
109 | gdbsim_* are stuff which is internal to gdb. */ | |
110 | ||
111 | /* Forward data declarations */ | |
112 | extern struct target_ops gdbsim_ops; | |
113 | ||
114 | static int program_loaded = 0; | |
115 | ||
116 | /* We must keep track of whether the simulator has been opened or not because | |
117 | GDB can call a target's close routine twice, but sim_close doesn't allow | |
118 | this. We also need to record the result of sim_open so we can pass it | |
119 | back to the other sim_foo routines. */ | |
120 | static SIM_DESC gdbsim_desc = 0; | |
121 | ||
122 | static void | |
123 | dump_mem (buf, len) | |
124 | char *buf; | |
125 | int len; | |
126 | { | |
127 | if (len <= 8) | |
128 | { | |
129 | if (len == 8 || len == 4) | |
130 | { | |
131 | long l[2]; | |
132 | memcpy (l, buf, len); | |
133 | printf_filtered ("\t0x%x", l[0]); | |
134 | printf_filtered (len == 8 ? " 0x%x\n" : "\n", l[1]); | |
135 | } | |
136 | else | |
137 | { | |
138 | int i; | |
139 | printf_filtered ("\t"); | |
140 | for (i = 0; i < len; i++) | |
141 | printf_filtered ("0x%x ", buf[i]); | |
142 | printf_filtered ("\n"); | |
143 | } | |
144 | } | |
145 | } | |
146 | ||
147 | static host_callback gdb_callback; | |
148 | static int callbacks_initialized = 0; | |
149 | ||
150 | /* Initialize gdb_callback. */ | |
151 | ||
152 | static void | |
153 | init_callbacks () | |
154 | { | |
155 | if (! callbacks_initialized) | |
156 | { | |
157 | gdb_callback = default_callback; | |
158 | gdb_callback.init (&gdb_callback); | |
159 | gdb_callback.write_stdout = gdb_os_write_stdout; | |
160 | gdb_callback.flush_stdout = gdb_os_flush_stdout; | |
161 | gdb_callback.write_stderr = gdb_os_write_stderr; | |
162 | gdb_callback.flush_stderr = gdb_os_flush_stderr; | |
163 | gdb_callback.printf_filtered = gdb_os_printf_filtered; | |
164 | gdb_callback.vprintf_filtered = gdb_os_vprintf_filtered; | |
165 | gdb_callback.evprintf_filtered = gdb_os_evprintf_filtered; | |
166 | gdb_callback.error = gdb_os_error; | |
167 | gdb_callback.poll_quit = gdb_os_poll_quit; | |
168 | gdb_callback.magic = HOST_CALLBACK_MAGIC; | |
169 | callbacks_initialized = 1; | |
170 | } | |
171 | } | |
172 | ||
173 | /* Release callbacks (free resources used by them). */ | |
174 | ||
175 | static void | |
176 | end_callbacks () | |
177 | { | |
178 | if (callbacks_initialized) | |
179 | { | |
180 | gdb_callback.shutdown (&gdb_callback); | |
181 | callbacks_initialized = 0; | |
182 | } | |
183 | } | |
184 | ||
185 | /* GDB version of os_write_stdout callback. */ | |
186 | ||
187 | static int | |
188 | gdb_os_write_stdout (p, buf, len) | |
189 | host_callback *p; | |
190 | const char *buf; | |
191 | int len; | |
192 | { | |
193 | int i; | |
194 | char b[2]; | |
195 | ||
196 | for (i = 0; i < len; i++) | |
197 | { | |
198 | b[0] = buf[i]; | |
199 | b[1] = 0; | |
43ff13b4 | 200 | fputs_unfiltered (b, gdb_stdtarg); |
c906108c SS |
201 | } |
202 | return len; | |
203 | } | |
204 | ||
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; | |
43ff13b4 | 229 | fputs_unfiltered (b, gdb_stdtarg); |
c906108c SS |
230 | } |
231 | return len; | |
232 | } | |
233 | ||
234 | /* GDB version of os_flush_stderr callback. */ | |
235 | ||
236 | static void | |
237 | gdb_os_flush_stderr (p) | |
238 | host_callback *p; | |
239 | { | |
240 | gdb_flush (gdb_stderr); | |
241 | } | |
242 | ||
243 | /* GDB version of printf_filtered callback. */ | |
244 | ||
245 | /* VARARGS */ | |
246 | static void | |
247 | #ifdef ANSI_PROTOTYPES | |
248 | gdb_os_printf_filtered (host_callback *p, const char *format, ...) | |
249 | #else | |
250 | gdb_os_printf_filtered (p, va_alist) | |
251 | host_callback *p; | |
252 | va_dcl | |
253 | #endif | |
254 | { | |
255 | va_list args; | |
256 | #ifdef ANSI_PROTOTYPES | |
257 | va_start (args, format); | |
258 | #else | |
259 | char *format; | |
260 | ||
261 | va_start (args); | |
262 | format = va_arg (args, char *); | |
263 | #endif | |
264 | ||
265 | vfprintf_filtered (gdb_stdout, format, args); | |
266 | ||
267 | va_end (args); | |
268 | } | |
269 | ||
270 | /* GDB version of error vprintf_filtered. */ | |
271 | ||
272 | /* VARARGS */ | |
273 | static void | |
274 | #ifdef ANSI_PROTOTYPES | |
275 | gdb_os_vprintf_filtered (host_callback *p, const char *format, va_list ap) | |
276 | #else | |
277 | gdb_os_vprintf_filtered (p, format, ap) | |
278 | host_callback *p; | |
279 | char *format; | |
280 | va_list ap; | |
281 | #endif | |
282 | { | |
283 | vfprintf_filtered (gdb_stdout, format, ap); | |
284 | } | |
285 | ||
286 | /* GDB version of error evprintf_filtered. */ | |
287 | ||
288 | /* VARARGS */ | |
289 | static void | |
290 | #ifdef ANSI_PROTOTYPES | |
291 | gdb_os_evprintf_filtered (host_callback *p, const char *format, va_list ap) | |
292 | #else | |
293 | gdb_os_evprintf_filtered (p, format, ap) | |
294 | host_callback *p; | |
295 | char *format; | |
296 | va_list ap; | |
297 | #endif | |
298 | { | |
299 | vfprintf_filtered (gdb_stderr, format, ap); | |
300 | } | |
301 | ||
302 | /* GDB version of error callback. */ | |
303 | ||
304 | /* VARARGS */ | |
305 | static void | |
306 | #ifdef ANSI_PROTOTYPES | |
307 | gdb_os_error (host_callback *p, const char *format, ...) | |
308 | #else | |
309 | gdb_os_error (p, va_alist) | |
310 | host_callback *p; | |
311 | va_dcl | |
312 | #endif | |
313 | { | |
314 | if (error_hook) | |
315 | (*error_hook) (); | |
316 | else | |
317 | { | |
318 | va_list args; | |
319 | #ifdef ANSI_PROTOTYPES | |
320 | va_start (args, format); | |
321 | #else | |
322 | char *format; | |
323 | ||
324 | va_start (args); | |
325 | format = va_arg (args, char *); | |
326 | #endif | |
327 | ||
328 | error_begin (); | |
329 | vfprintf_filtered (gdb_stderr, format, args); | |
330 | fprintf_filtered (gdb_stderr, "\n"); | |
331 | va_end (args); | |
332 | return_to_top_level (RETURN_ERROR); | |
333 | } | |
334 | } | |
335 | ||
336 | static void | |
337 | gdbsim_fetch_register (regno) | |
338 | int regno; | |
339 | { | |
340 | static int warn_user = 1; | |
341 | if (regno == -1) | |
342 | { | |
343 | for (regno = 0; regno < NUM_REGS; regno++) | |
344 | gdbsim_fetch_register (regno); | |
345 | } | |
346 | else if (REGISTER_NAME (regno) != NULL && *REGISTER_NAME (regno) != '\0') | |
347 | { | |
348 | char buf[MAX_REGISTER_RAW_SIZE]; | |
349 | int nr_bytes = sim_fetch_register (gdbsim_desc, regno, buf, REGISTER_RAW_SIZE (regno)); | |
350 | if (nr_bytes == 0) | |
351 | /* register not applicable, supply zero's */ | |
352 | memset (buf, 0, MAX_REGISTER_RAW_SIZE); | |
353 | else if (nr_bytes > 0 && nr_bytes != REGISTER_RAW_SIZE (regno) | |
354 | && warn_user) | |
355 | { | |
356 | printf_unfiltered ("Size of register %s (%d) incorrect (%d instead of %d))", | |
357 | REGISTER_NAME (regno), regno, | |
358 | nr_bytes, REGISTER_RAW_SIZE (regno)); | |
359 | warn_user = 0; | |
360 | } | |
361 | supply_register (regno, buf); | |
362 | if (sr_get_debug ()) | |
363 | { | |
364 | printf_filtered ("gdbsim_fetch_register: %d", regno); | |
365 | /* FIXME: We could print something more intelligible. */ | |
366 | dump_mem (buf, REGISTER_RAW_SIZE (regno)); | |
367 | } | |
368 | } | |
369 | } | |
370 | ||
371 | ||
372 | static void | |
373 | gdbsim_store_register (regno) | |
374 | int regno; | |
375 | { | |
376 | if (regno == -1) | |
377 | { | |
378 | for (regno = 0; regno < NUM_REGS; regno++) | |
379 | gdbsim_store_register (regno); | |
380 | } | |
381 | else if (REGISTER_NAME (regno) != NULL && *REGISTER_NAME (regno) != '\0') | |
382 | { | |
383 | char tmp[MAX_REGISTER_RAW_SIZE]; | |
384 | int nr_bytes; | |
385 | read_register_gen (regno, tmp); | |
386 | nr_bytes = sim_store_register (gdbsim_desc, regno, tmp, REGISTER_RAW_SIZE (regno)); | |
387 | if (nr_bytes > 0 && nr_bytes != REGISTER_RAW_SIZE (regno)) | |
388 | fatal ("Register size different to expected"); | |
389 | if (sr_get_debug ()) | |
390 | { | |
391 | printf_filtered ("gdbsim_store_register: %d", regno); | |
392 | /* FIXME: We could print something more intelligible. */ | |
393 | dump_mem (tmp, REGISTER_RAW_SIZE (regno)); | |
394 | } | |
395 | } | |
396 | } | |
397 | ||
398 | /* Kill the running program. This may involve closing any open files | |
399 | and releasing other resources acquired by the simulated program. */ | |
400 | ||
401 | static void | |
402 | gdbsim_kill () | |
403 | { | |
404 | if (sr_get_debug ()) | |
405 | printf_filtered ("gdbsim_kill\n"); | |
406 | ||
407 | /* There is no need to `kill' running simulator - the simulator is | |
408 | not running */ | |
409 | inferior_pid = 0; | |
410 | } | |
411 | ||
412 | /* Load an executable file into the target process. This is expected to | |
413 | not only bring new code into the target process, but also to update | |
414 | GDB's symbol tables to match. */ | |
415 | ||
416 | static void | |
417 | gdbsim_load (prog, fromtty) | |
418 | char *prog; | |
419 | int fromtty; | |
420 | { | |
421 | if (sr_get_debug ()) | |
422 | printf_filtered ("gdbsim_load: prog \"%s\"\n", prog); | |
423 | ||
424 | inferior_pid = 0; | |
425 | ||
426 | /* FIXME: We will print two messages on error. | |
427 | Need error to either not print anything if passed NULL or need | |
428 | another routine that doesn't take any arguments. */ | |
429 | if (sim_load (gdbsim_desc, prog, NULL, fromtty) == SIM_RC_FAIL) | |
430 | error ("unable to load program"); | |
431 | ||
432 | /* FIXME: If a load command should reset the targets registers then | |
433 | a call to sim_create_inferior() should go here. */ | |
434 | ||
435 | program_loaded = 1; | |
436 | } | |
437 | ||
438 | ||
439 | /* Start an inferior process and set inferior_pid to its pid. | |
440 | EXEC_FILE is the file to run. | |
441 | ARGS is a string containing the arguments to the program. | |
442 | ENV is the environment vector to pass. Errors reported with error(). | |
443 | On VxWorks and various standalone systems, we ignore exec_file. */ | |
444 | /* This is called not only when we first attach, but also when the | |
445 | user types "run" after having attached. */ | |
446 | ||
447 | static void | |
448 | gdbsim_create_inferior (exec_file, args, env) | |
449 | char *exec_file; | |
450 | char *args; | |
451 | char **env; | |
452 | { | |
453 | int len; | |
454 | char *arg_buf,**argv; | |
455 | ||
456 | if (exec_file == 0 || exec_bfd == 0) | |
457 | warning ("No executable file specified."); | |
458 | if (! program_loaded) | |
459 | warning ("No program loaded."); | |
460 | ||
461 | if (sr_get_debug ()) | |
462 | printf_filtered ("gdbsim_create_inferior: exec_file \"%s\", args \"%s\"\n", | |
463 | (exec_file ? exec_file: "(NULL)"), | |
464 | args); | |
465 | ||
466 | gdbsim_kill (); | |
467 | remove_breakpoints (); | |
468 | init_wait_for_inferior (); | |
469 | ||
470 | if (exec_file != NULL) | |
471 | { | |
472 | len = strlen (exec_file) + 1 + strlen (args) + 1 + /*slop*/ 10; | |
473 | arg_buf = (char *) alloca (len); | |
474 | arg_buf[0] = '\0'; | |
475 | strcat (arg_buf, exec_file); | |
476 | strcat (arg_buf, " "); | |
477 | strcat (arg_buf, args); | |
478 | argv = buildargv (arg_buf); | |
7a292a7a | 479 | make_cleanup_freeargv (argv); |
c906108c SS |
480 | } |
481 | else | |
482 | argv = NULL; | |
483 | sim_create_inferior (gdbsim_desc, exec_bfd, argv, env); | |
484 | ||
485 | inferior_pid = 42; | |
486 | insert_breakpoints (); /* Needed to get correct instruction in cache */ | |
487 | ||
488 | clear_proceed_status (); | |
489 | ||
490 | /* NB: Entry point already set by sim_create_inferior. */ | |
491 | proceed ((CORE_ADDR)-1, TARGET_SIGNAL_DEFAULT, 0); | |
492 | } | |
493 | ||
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. */ | |
498 | ||
499 | static void | |
500 | gdbsim_open (args, from_tty) | |
501 | char *args; | |
502 | int from_tty; | |
503 | { | |
504 | int len; | |
505 | char *arg_buf; | |
506 | char **argv; | |
507 | ||
508 | if (sr_get_debug ()) | |
509 | printf_filtered ("gdbsim_open: args \"%s\"\n", args ? args : "(null)"); | |
510 | ||
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'. */ | |
517 | if (gdbsim_desc != NULL) | |
518 | unpush_target (&gdbsim_ops); | |
519 | ||
520 | len = (7 + 1 /* gdbsim */ | |
521 | + strlen (" -E little") | |
522 | + strlen (" --architecture=xxxxxxxxxx") | |
523 | + (args ? strlen (args) : 0) | |
524 | + 50) /* slack */; | |
525 | arg_buf = (char *) alloca (len); | |
526 | strcpy (arg_buf, "gdbsim"); /* 7 */ | |
527 | /* Specify the byte order for the target when it is both selectable | |
528 | and explicitly specified by the user (not auto detected). */ | |
529 | if (TARGET_BYTE_ORDER_SELECTABLE_P | |
530 | && !TARGET_BYTE_ORDER_AUTO) | |
531 | { | |
532 | switch (TARGET_BYTE_ORDER) | |
533 | { | |
534 | case BIG_ENDIAN: | |
535 | strcat (arg_buf, " -E big"); | |
536 | break; | |
537 | case LITTLE_ENDIAN: | |
538 | strcat (arg_buf, " -E little"); | |
539 | break; | |
540 | default: | |
541 | fatal ("Value of TARGET_BYTE_ORDER unknown"); | |
542 | } | |
543 | } | |
544 | /* Specify the architecture of the target when it has been | |
545 | explicitly specified */ | |
546 | if (!TARGET_ARCHITECTURE_AUTO) | |
547 | { | |
548 | strcat (arg_buf, " --architecture="); | |
549 | strcat (arg_buf, TARGET_ARCHITECTURE->printable_name); | |
550 | } | |
551 | /* finally, any explicit args */ | |
552 | if (args) | |
553 | { | |
554 | strcat (arg_buf, " "); /* 1 */ | |
555 | strcat (arg_buf, args); | |
556 | } | |
557 | argv = buildargv (arg_buf); | |
558 | if (argv == NULL) | |
559 | error ("Insufficient memory available to allocate simulator arg list."); | |
7a292a7a | 560 | make_cleanup_freeargv (argv); |
c906108c SS |
561 | |
562 | init_callbacks (); | |
563 | gdbsim_desc = sim_open (SIM_OPEN_DEBUG, &gdb_callback, exec_bfd, argv); | |
564 | ||
565 | if (gdbsim_desc == 0) | |
566 | error ("unable to create simulator instance"); | |
567 | ||
568 | push_target (&gdbsim_ops); | |
569 | target_fetch_registers (-1); | |
570 | printf_filtered ("Connected to the simulator.\n"); | |
571 | } | |
572 | ||
573 | /* Does whatever cleanup is required for a target that we are no longer | |
574 | going to be calling. Argument says whether we are quitting gdb and | |
575 | should not get hung in case of errors, or whether we want a clean | |
576 | termination even if it takes a while. This routine is automatically | |
577 | always called just before a routine is popped off the target stack. | |
578 | Closing file descriptors and freeing memory are typical things it should | |
579 | do. */ | |
580 | /* Close out all files and local state before this target loses control. */ | |
581 | ||
582 | static void | |
583 | gdbsim_close (quitting) | |
584 | int quitting; | |
585 | { | |
586 | if (sr_get_debug ()) | |
587 | printf_filtered ("gdbsim_close: quitting %d\n", quitting); | |
588 | ||
589 | program_loaded = 0; | |
590 | ||
591 | if (gdbsim_desc != NULL) | |
592 | { | |
593 | sim_close (gdbsim_desc, quitting); | |
594 | gdbsim_desc = NULL; | |
595 | } | |
596 | ||
597 | end_callbacks (); | |
598 | } | |
599 | ||
600 | /* Takes a program previously attached to and detaches it. | |
601 | The program may resume execution (some targets do, some don't) and will | |
602 | no longer stop on signals, etc. We better not have left any breakpoints | |
603 | in the program or it'll die when it hits one. ARGS is arguments | |
604 | typed by the user (e.g. a signal to send the process). FROM_TTY | |
605 | says whether to be verbose or not. */ | |
606 | /* Terminate the open connection to the remote debugger. | |
607 | Use this when you want to detach and do something else with your gdb. */ | |
608 | ||
609 | static void | |
610 | gdbsim_detach (args,from_tty) | |
611 | char *args; | |
612 | int from_tty; | |
613 | { | |
614 | if (sr_get_debug ()) | |
615 | printf_filtered ("gdbsim_detach: args \"%s\"\n", args); | |
616 | ||
617 | pop_target (); /* calls gdbsim_close to do the real work */ | |
618 | if (from_tty) | |
619 | printf_filtered ("Ending simulator %s debugging\n", target_shortname); | |
620 | } | |
621 | ||
622 | /* Resume execution of the target process. STEP says whether to single-step | |
623 | or to run free; SIGGNAL is the signal value (e.g. SIGINT) to be given | |
624 | to the target, or zero for no signal. */ | |
625 | ||
626 | static enum target_signal resume_siggnal; | |
627 | static int resume_step; | |
628 | ||
629 | static void | |
630 | gdbsim_resume (pid, step, siggnal) | |
631 | int pid, step; | |
632 | enum target_signal siggnal; | |
633 | { | |
634 | if (inferior_pid != 42) | |
635 | error ("The program is not being run."); | |
636 | ||
637 | if (sr_get_debug ()) | |
638 | printf_filtered ("gdbsim_resume: step %d, signal %d\n", step, siggnal); | |
639 | ||
640 | resume_siggnal = siggnal; | |
641 | resume_step = step; | |
642 | } | |
643 | ||
644 | /* Notify the simulator of an asynchronous request to stop. | |
645 | ||
646 | The simulator shall ensure that the stop request is eventually | |
647 | delivered to the simulator. If the call is made while the | |
648 | simulator is not running then the stop request is processed when | |
649 | the simulator is next resumed. | |
650 | ||
651 | For simulators that do not support this operation, just abort */ | |
652 | ||
653 | static void | |
654 | gdbsim_stop () | |
655 | { | |
656 | if (! sim_stop (gdbsim_desc)) | |
657 | { | |
658 | quit (); | |
659 | } | |
660 | } | |
661 | ||
662 | /* GDB version of os_poll_quit callback. | |
663 | Taken from gdb/util.c - should be in a library */ | |
664 | ||
665 | static int | |
666 | gdb_os_poll_quit (p) | |
667 | host_callback *p; | |
668 | { | |
7a292a7a SS |
669 | if (ui_loop_hook != NULL) |
670 | ui_loop_hook (0); | |
671 | ||
c906108c SS |
672 | notice_quit (); |
673 | if (quit_flag) /* gdb's idea of quit */ | |
674 | { | |
675 | quit_flag = 0; /* we've stolen it */ | |
676 | return 1; | |
677 | } | |
678 | else if (immediate_quit) | |
679 | { | |
680 | return 1; | |
681 | } | |
682 | return 0; | |
683 | } | |
684 | ||
685 | /* Wait for inferior process to do something. Return pid of child, | |
686 | or -1 in case of error; store status through argument pointer STATUS, | |
687 | just as `wait' would. */ | |
688 | ||
689 | static void | |
690 | gdbsim_cntrl_c (signo) | |
691 | int signo; | |
692 | { | |
693 | gdbsim_stop (); | |
694 | } | |
695 | ||
696 | static int | |
697 | gdbsim_wait (pid, status) | |
698 | int pid; | |
699 | struct target_waitstatus *status; | |
700 | { | |
701 | static RETSIGTYPE (*prev_sigint) (); | |
702 | int sigrc = 0; | |
703 | enum sim_stop reason = sim_running; | |
704 | ||
705 | if (sr_get_debug ()) | |
706 | printf_filtered ("gdbsim_wait\n"); | |
707 | ||
708 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) | |
709 | { | |
710 | struct sigaction sa, osa; | |
711 | sa.sa_handler = gdbsim_cntrl_c; | |
712 | sigemptyset (&sa.sa_mask); | |
713 | sa.sa_flags = 0; | |
714 | sigaction (SIGINT, &sa, &osa); | |
715 | prev_sigint = osa.sa_handler; | |
716 | } | |
717 | #else | |
718 | prev_sigint = signal (SIGINT, gdbsim_cntrl_c); | |
719 | #endif | |
720 | sim_resume (gdbsim_desc, resume_step, | |
721 | target_signal_to_host (resume_siggnal)); | |
722 | signal (SIGINT, prev_sigint); | |
723 | resume_step = 0; | |
724 | ||
725 | sim_stop_reason (gdbsim_desc, &reason, &sigrc); | |
726 | ||
727 | switch (reason) | |
728 | { | |
729 | case sim_exited: | |
730 | status->kind = TARGET_WAITKIND_EXITED; | |
731 | status->value.integer = sigrc; | |
732 | break; | |
733 | case sim_stopped: | |
734 | switch (sigrc) | |
735 | { | |
736 | case SIGABRT: | |
737 | quit (); | |
738 | break; | |
739 | case SIGINT: | |
740 | case SIGTRAP: | |
741 | default: | |
742 | status->kind = TARGET_WAITKIND_STOPPED; | |
743 | /* The signal in sigrc is a host signal. That probably | |
744 | should be fixed. */ | |
745 | status->value.sig = target_signal_from_host (sigrc); | |
746 | break; | |
747 | } | |
748 | break; | |
749 | case sim_signalled: | |
750 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
751 | /* The signal in sigrc is a host signal. That probably | |
752 | should be fixed. */ | |
753 | status->value.sig = target_signal_from_host (sigrc); | |
754 | break; | |
755 | case sim_running: | |
756 | case sim_polling: | |
757 | /* FIXME: Is this correct? */ | |
758 | break; | |
759 | } | |
760 | ||
761 | return inferior_pid; | |
762 | } | |
763 | ||
764 | /* Get ready to modify the registers array. On machines which store | |
765 | individual registers, this doesn't need to do anything. On machines | |
766 | which store all the registers in one fell swoop, this makes sure | |
767 | that registers contains all the registers from the program being | |
768 | debugged. */ | |
769 | ||
770 | static void | |
771 | gdbsim_prepare_to_store () | |
772 | { | |
773 | /* Do nothing, since we can store individual regs */ | |
774 | } | |
775 | ||
776 | static int | |
777 | gdbsim_xfer_inferior_memory (memaddr, myaddr, len, write, target) | |
778 | CORE_ADDR memaddr; | |
779 | char *myaddr; | |
780 | int len; | |
781 | int write; | |
782 | struct target_ops *target; /* ignored */ | |
783 | { | |
784 | if (! program_loaded) | |
785 | error ("No program loaded."); | |
786 | ||
787 | if (sr_get_debug ()) | |
788 | { | |
789 | printf_filtered ("gdbsim_xfer_inferior_memory: myaddr 0x%x, memaddr 0x%x, len %d, write %d\n", | |
790 | myaddr, memaddr, len, write); | |
791 | if (sr_get_debug () && write) | |
792 | dump_mem(myaddr, len); | |
793 | } | |
794 | ||
795 | if (write) | |
796 | { | |
797 | len = sim_write (gdbsim_desc, memaddr, myaddr, len); | |
798 | } | |
799 | else | |
800 | { | |
801 | len = sim_read (gdbsim_desc, memaddr, myaddr, len); | |
802 | if (sr_get_debug () && len > 0) | |
803 | dump_mem(myaddr, len); | |
804 | } | |
805 | return len; | |
806 | } | |
807 | ||
808 | static void | |
809 | gdbsim_files_info (target) | |
810 | struct target_ops *target; | |
811 | { | |
812 | char *file = "nothing"; | |
813 | ||
814 | if (exec_bfd) | |
815 | file = bfd_get_filename (exec_bfd); | |
816 | ||
817 | if (sr_get_debug ()) | |
818 | printf_filtered ("gdbsim_files_info: file \"%s\"\n", file); | |
819 | ||
820 | if (exec_bfd) | |
821 | { | |
822 | printf_filtered ("\tAttached to %s running program %s\n", | |
823 | target_shortname, file); | |
824 | sim_info (gdbsim_desc, 0); | |
825 | } | |
826 | } | |
827 | ||
828 | /* Clear the simulator's notion of what the break points are. */ | |
829 | ||
830 | static void | |
831 | gdbsim_mourn_inferior () | |
832 | { | |
833 | if (sr_get_debug ()) | |
834 | printf_filtered ("gdbsim_mourn_inferior:\n"); | |
835 | ||
836 | remove_breakpoints (); | |
837 | generic_mourn_inferior (); | |
838 | } | |
839 | ||
840 | static int | |
841 | gdbsim_insert_breakpoint (addr, contents_cache) | |
842 | CORE_ADDR addr; | |
843 | char *contents_cache; | |
844 | { | |
845 | #ifdef SIM_HAS_BREAKPOINTS | |
846 | SIM_RC retcode; | |
847 | ||
848 | retcode = sim_set_breakpoint (gdbsim_desc, addr); | |
849 | ||
850 | switch (retcode) | |
851 | { | |
852 | case SIM_RC_OK: | |
853 | return 0; | |
854 | case SIM_RC_INSUFFICIENT_RESOURCES: | |
855 | return ENOMEM; | |
856 | default: | |
857 | return EIO; | |
858 | } | |
859 | #else | |
860 | return memory_insert_breakpoint (addr, contents_cache); | |
861 | #endif | |
862 | } | |
863 | ||
864 | static int | |
865 | gdbsim_remove_breakpoint (addr, contents_cache) | |
866 | CORE_ADDR addr; | |
867 | char *contents_cache; | |
868 | { | |
869 | #ifdef SIM_HAS_BREAKPOINTS | |
870 | SIM_RC retcode; | |
871 | ||
872 | retcode = sim_clear_breakpoint (gdbsim_desc, addr); | |
873 | ||
874 | switch (retcode) | |
875 | { | |
876 | case SIM_RC_OK: | |
877 | case SIM_RC_UNKNOWN_BREAKPOINT: | |
878 | return 0; | |
879 | case SIM_RC_INSUFFICIENT_RESOURCES: | |
880 | return ENOMEM; | |
881 | default: | |
882 | return EIO; | |
883 | } | |
884 | #else | |
885 | return memory_remove_breakpoint (addr, contents_cache); | |
886 | #endif | |
887 | } | |
888 | ||
889 | /* Pass the command argument through to the simulator verbatim. The | |
890 | simulator must do any command interpretation work. */ | |
891 | ||
892 | void | |
893 | simulator_command (args, from_tty) | |
894 | char *args; | |
895 | int from_tty; | |
896 | { | |
897 | if (gdbsim_desc == NULL) | |
898 | { | |
899 | ||
900 | /* PREVIOUSLY: The user may give a command before the simulator | |
901 | is opened. [...] (??? assuming of course one wishes to | |
902 | continue to allow commands to be sent to unopened simulators, | |
903 | which isn't entirely unreasonable). */ | |
904 | ||
905 | /* The simulator is a builtin abstraction of a remote target. | |
906 | Consistent with that model, access to the simulator, via sim | |
907 | commands, is restricted to the period when the channel to the | |
908 | simulator is open. */ | |
909 | ||
910 | error ("Not connected to the simulator target"); | |
911 | } | |
912 | ||
913 | sim_do_command (gdbsim_desc, args); | |
914 | ||
915 | /* Invalidate the register cache, in case the simulator command does | |
916 | something funny. */ | |
917 | registers_changed (); | |
918 | } | |
919 | ||
920 | /* Define the target subroutine names */ | |
921 | ||
922 | struct target_ops gdbsim_ops ; | |
923 | ||
924 | static void | |
925 | init_gdbsim_ops(void) | |
926 | { | |
927 | gdbsim_ops.to_shortname = "sim"; | |
928 | gdbsim_ops.to_longname = "simulator"; | |
929 | gdbsim_ops.to_doc = "Use the compiled-in simulator."; | |
930 | gdbsim_ops.to_open = gdbsim_open; | |
931 | gdbsim_ops.to_close = gdbsim_close; | |
932 | gdbsim_ops.to_attach = NULL; | |
933 | gdbsim_ops.to_post_attach = NULL; | |
934 | gdbsim_ops.to_require_attach = NULL; | |
935 | gdbsim_ops.to_detach = gdbsim_detach; | |
936 | gdbsim_ops.to_require_detach = NULL; | |
937 | gdbsim_ops.to_resume = gdbsim_resume; | |
938 | gdbsim_ops.to_wait = gdbsim_wait; | |
939 | gdbsim_ops.to_post_wait = NULL; | |
940 | gdbsim_ops.to_fetch_registers = gdbsim_fetch_register; | |
941 | gdbsim_ops.to_store_registers = gdbsim_store_register; | |
942 | gdbsim_ops.to_prepare_to_store = gdbsim_prepare_to_store; | |
943 | gdbsim_ops.to_xfer_memory = gdbsim_xfer_inferior_memory; | |
944 | gdbsim_ops.to_files_info = gdbsim_files_info; | |
945 | gdbsim_ops.to_insert_breakpoint = gdbsim_insert_breakpoint; | |
946 | gdbsim_ops.to_remove_breakpoint = gdbsim_remove_breakpoint; | |
947 | gdbsim_ops.to_terminal_init = NULL; | |
948 | gdbsim_ops.to_terminal_inferior = NULL; | |
949 | gdbsim_ops.to_terminal_ours_for_output = NULL; | |
950 | gdbsim_ops.to_terminal_ours = NULL; | |
951 | gdbsim_ops.to_terminal_info = NULL; | |
952 | gdbsim_ops.to_kill = gdbsim_kill; | |
953 | gdbsim_ops.to_load = gdbsim_load; | |
954 | gdbsim_ops.to_lookup_symbol = NULL; | |
955 | gdbsim_ops.to_create_inferior = gdbsim_create_inferior; | |
956 | gdbsim_ops.to_post_startup_inferior = NULL; | |
957 | gdbsim_ops.to_acknowledge_created_inferior = NULL; | |
958 | gdbsim_ops.to_clone_and_follow_inferior = NULL; | |
959 | gdbsim_ops.to_post_follow_inferior_by_clone = NULL; | |
960 | gdbsim_ops.to_insert_fork_catchpoint = NULL; | |
961 | gdbsim_ops.to_remove_fork_catchpoint = NULL; | |
962 | gdbsim_ops.to_insert_vfork_catchpoint = NULL; | |
963 | gdbsim_ops.to_remove_vfork_catchpoint = NULL; | |
964 | gdbsim_ops.to_has_forked = NULL; | |
965 | gdbsim_ops.to_has_vforked = NULL; | |
966 | gdbsim_ops.to_can_follow_vfork_prior_to_exec = NULL; | |
967 | gdbsim_ops.to_post_follow_vfork = NULL; | |
968 | gdbsim_ops.to_insert_exec_catchpoint = NULL; | |
969 | gdbsim_ops.to_remove_exec_catchpoint = NULL; | |
970 | gdbsim_ops.to_has_execd = NULL; | |
971 | gdbsim_ops.to_reported_exec_events_per_exec_call = NULL; | |
972 | gdbsim_ops.to_has_exited = NULL; | |
973 | gdbsim_ops.to_mourn_inferior = gdbsim_mourn_inferior; | |
974 | gdbsim_ops.to_can_run = 0; | |
975 | gdbsim_ops.to_notice_signals = 0; | |
976 | gdbsim_ops.to_thread_alive = 0; | |
977 | gdbsim_ops.to_stop = gdbsim_stop; | |
978 | gdbsim_ops.to_pid_to_exec_file = NULL; | |
979 | gdbsim_ops.to_core_file_to_sym_file = NULL; | |
980 | gdbsim_ops.to_stratum = process_stratum; | |
981 | gdbsim_ops.DONT_USE = NULL; | |
982 | gdbsim_ops.to_has_all_memory = 1; | |
983 | gdbsim_ops.to_has_memory = 1; | |
984 | gdbsim_ops.to_has_stack = 1; | |
985 | gdbsim_ops.to_has_registers = 1; | |
986 | gdbsim_ops.to_has_execution = 1; | |
987 | gdbsim_ops.to_sections = NULL; | |
988 | gdbsim_ops.to_sections_end = NULL; | |
989 | gdbsim_ops.to_magic = OPS_MAGIC; | |
990 | ||
991 | #ifdef TARGET_REDEFINE_DEFAULT_OPS | |
992 | TARGET_REDEFINE_DEFAULT_OPS (&gdbsim_ops); | |
993 | #endif | |
994 | } | |
995 | ||
996 | void | |
997 | _initialize_remote_sim () | |
998 | { | |
999 | init_gdbsim_ops() ; | |
1000 | add_target (&gdbsim_ops); | |
1001 | ||
1002 | add_com ("sim <command>", class_obscure, simulator_command, | |
1003 | "Send a command to the simulator."); | |
1004 | } |