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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 | ||
7a292a7a SS |
42 | extern int (*ui_loop_hook) PARAMS ((int signo)); |
43 | ||
c906108c SS |
44 | static void dump_mem PARAMS ((char *buf, int len)); |
45 | ||
46 | static void init_callbacks PARAMS ((void)); | |
47 | ||
48 | static void end_callbacks PARAMS ((void)); | |
49 | ||
50 | static int gdb_os_write_stdout PARAMS ((host_callback *, const char *, int)); | |
51 | ||
52 | static void gdb_os_flush_stdout PARAMS ((host_callback *)); | |
53 | ||
54 | static int gdb_os_write_stderr PARAMS ((host_callback *, const char *, int)); | |
55 | ||
56 | static void gdb_os_flush_stderr PARAMS ((host_callback *)); | |
57 | ||
58 | static int gdb_os_poll_quit PARAMS ((host_callback *)); | |
59 | ||
60 | /* printf_filtered is depreciated */ | |
61 | static void gdb_os_printf_filtered PARAMS ((host_callback *, const char *, ...)); | |
62 | ||
63 | static void gdb_os_vprintf_filtered PARAMS ((host_callback *, const char *, va_list)); | |
64 | ||
65 | static void gdb_os_evprintf_filtered PARAMS ((host_callback *, const char *, va_list)); | |
66 | ||
67 | static void gdb_os_error PARAMS ((host_callback *, const char *, ...)); | |
68 | ||
69 | static void gdbsim_fetch_register PARAMS ((int regno)); | |
70 | ||
71 | static void gdbsim_store_register PARAMS ((int regno)); | |
72 | ||
73 | static void gdbsim_kill PARAMS ((void)); | |
74 | ||
75 | static void gdbsim_load PARAMS ((char *prog, int fromtty)); | |
76 | ||
77 | static void gdbsim_create_inferior PARAMS ((char *exec_file, char *args, char **env)); | |
78 | ||
79 | static void gdbsim_open PARAMS ((char *args, int from_tty)); | |
80 | ||
81 | static void gdbsim_close PARAMS ((int quitting)); | |
82 | ||
83 | static void gdbsim_detach PARAMS ((char *args, int from_tty)); | |
84 | ||
85 | static void gdbsim_resume PARAMS ((int pid, int step, enum target_signal siggnal)); | |
86 | ||
87 | static int gdbsim_wait PARAMS ((int pid, struct target_waitstatus *status)); | |
88 | ||
89 | static void gdbsim_prepare_to_store PARAMS ((void)); | |
90 | ||
91 | static int gdbsim_xfer_inferior_memory PARAMS ((CORE_ADDR memaddr, | |
92 | char *myaddr, int len, | |
93 | int write, | |
94 | struct target_ops *target)); | |
95 | ||
96 | static void gdbsim_files_info PARAMS ((struct target_ops *target)); | |
97 | ||
98 | static void gdbsim_mourn_inferior PARAMS ((void)); | |
99 | ||
100 | static void gdbsim_stop PARAMS ((void)); | |
101 | ||
102 | void simulator_command PARAMS ((char *args, int from_tty)); | |
103 | ||
104 | /* Naming convention: | |
105 | ||
106 | sim_* are the interface to the simulator (see remote-sim.h). | |
107 | gdbsim_* are stuff which is internal to gdb. */ | |
108 | ||
109 | /* Forward data declarations */ | |
110 | extern struct target_ops gdbsim_ops; | |
111 | ||
112 | static int program_loaded = 0; | |
113 | ||
114 | /* We must keep track of whether the simulator has been opened or not because | |
115 | GDB can call a target's close routine twice, but sim_close doesn't allow | |
116 | this. We also need to record the result of sim_open so we can pass it | |
117 | back to the other sim_foo routines. */ | |
118 | static SIM_DESC gdbsim_desc = 0; | |
119 | ||
120 | static void | |
121 | dump_mem (buf, len) | |
122 | char *buf; | |
123 | int len; | |
124 | { | |
125 | if (len <= 8) | |
126 | { | |
127 | if (len == 8 || len == 4) | |
128 | { | |
129 | long l[2]; | |
130 | memcpy (l, buf, len); | |
131 | printf_filtered ("\t0x%x", l[0]); | |
132 | printf_filtered (len == 8 ? " 0x%x\n" : "\n", l[1]); | |
133 | } | |
134 | else | |
135 | { | |
136 | int i; | |
137 | printf_filtered ("\t"); | |
138 | for (i = 0; i < len; i++) | |
139 | printf_filtered ("0x%x ", buf[i]); | |
140 | printf_filtered ("\n"); | |
141 | } | |
142 | } | |
143 | } | |
144 | ||
145 | static host_callback gdb_callback; | |
146 | static int callbacks_initialized = 0; | |
147 | ||
148 | /* Initialize gdb_callback. */ | |
149 | ||
150 | static void | |
151 | init_callbacks () | |
152 | { | |
153 | if (! callbacks_initialized) | |
154 | { | |
155 | gdb_callback = default_callback; | |
156 | gdb_callback.init (&gdb_callback); | |
157 | gdb_callback.write_stdout = gdb_os_write_stdout; | |
158 | gdb_callback.flush_stdout = gdb_os_flush_stdout; | |
159 | gdb_callback.write_stderr = gdb_os_write_stderr; | |
160 | gdb_callback.flush_stderr = gdb_os_flush_stderr; | |
161 | gdb_callback.printf_filtered = gdb_os_printf_filtered; | |
162 | gdb_callback.vprintf_filtered = gdb_os_vprintf_filtered; | |
163 | gdb_callback.evprintf_filtered = gdb_os_evprintf_filtered; | |
164 | gdb_callback.error = gdb_os_error; | |
165 | gdb_callback.poll_quit = gdb_os_poll_quit; | |
166 | gdb_callback.magic = HOST_CALLBACK_MAGIC; | |
167 | callbacks_initialized = 1; | |
168 | } | |
169 | } | |
170 | ||
171 | /* Release callbacks (free resources used by them). */ | |
172 | ||
173 | static void | |
174 | end_callbacks () | |
175 | { | |
176 | if (callbacks_initialized) | |
177 | { | |
178 | gdb_callback.shutdown (&gdb_callback); | |
179 | callbacks_initialized = 0; | |
180 | } | |
181 | } | |
182 | ||
183 | /* GDB version of os_write_stdout callback. */ | |
184 | ||
185 | static int | |
186 | gdb_os_write_stdout (p, buf, len) | |
187 | host_callback *p; | |
188 | const char *buf; | |
189 | int len; | |
190 | { | |
191 | int i; | |
192 | char b[2]; | |
193 | ||
194 | for (i = 0; i < len; i++) | |
195 | { | |
196 | b[0] = buf[i]; | |
197 | b[1] = 0; | |
198 | if (target_output_hook) | |
199 | target_output_hook (b); | |
200 | else | |
201 | fputs_filtered (b, gdb_stdout); | |
202 | } | |
203 | return len; | |
204 | } | |
205 | ||
206 | /* GDB version of os_flush_stdout callback. */ | |
207 | ||
208 | static void | |
209 | gdb_os_flush_stdout (p) | |
210 | host_callback *p; | |
211 | { | |
212 | gdb_flush (gdb_stdout); | |
213 | } | |
214 | ||
215 | /* GDB version of os_write_stderr callback. */ | |
216 | ||
217 | static int | |
218 | gdb_os_write_stderr (p, buf, len) | |
219 | host_callback *p; | |
220 | const char *buf; | |
221 | int len; | |
222 | { | |
223 | int i; | |
224 | char b[2]; | |
225 | ||
226 | for (i = 0; i < len; i++) | |
227 | { | |
228 | b[0] = buf[i]; | |
229 | b[1] = 0; | |
230 | if (target_output_hook) | |
231 | target_output_hook (b); | |
232 | else | |
233 | fputs_filtered (b, gdb_stderr); | |
234 | } | |
235 | return len; | |
236 | } | |
237 | ||
238 | /* GDB version of os_flush_stderr callback. */ | |
239 | ||
240 | static void | |
241 | gdb_os_flush_stderr (p) | |
242 | host_callback *p; | |
243 | { | |
244 | gdb_flush (gdb_stderr); | |
245 | } | |
246 | ||
247 | /* GDB version of printf_filtered callback. */ | |
248 | ||
249 | /* VARARGS */ | |
250 | static void | |
251 | #ifdef ANSI_PROTOTYPES | |
252 | gdb_os_printf_filtered (host_callback *p, const char *format, ...) | |
253 | #else | |
254 | gdb_os_printf_filtered (p, va_alist) | |
255 | host_callback *p; | |
256 | va_dcl | |
257 | #endif | |
258 | { | |
259 | va_list args; | |
260 | #ifdef ANSI_PROTOTYPES | |
261 | va_start (args, format); | |
262 | #else | |
263 | char *format; | |
264 | ||
265 | va_start (args); | |
266 | format = va_arg (args, char *); | |
267 | #endif | |
268 | ||
269 | vfprintf_filtered (gdb_stdout, format, args); | |
270 | ||
271 | va_end (args); | |
272 | } | |
273 | ||
274 | /* GDB version of error vprintf_filtered. */ | |
275 | ||
276 | /* VARARGS */ | |
277 | static void | |
278 | #ifdef ANSI_PROTOTYPES | |
279 | gdb_os_vprintf_filtered (host_callback *p, const char *format, va_list ap) | |
280 | #else | |
281 | gdb_os_vprintf_filtered (p, format, ap) | |
282 | host_callback *p; | |
283 | char *format; | |
284 | va_list ap; | |
285 | #endif | |
286 | { | |
287 | vfprintf_filtered (gdb_stdout, format, ap); | |
288 | } | |
289 | ||
290 | /* GDB version of error evprintf_filtered. */ | |
291 | ||
292 | /* VARARGS */ | |
293 | static void | |
294 | #ifdef ANSI_PROTOTYPES | |
295 | gdb_os_evprintf_filtered (host_callback *p, const char *format, va_list ap) | |
296 | #else | |
297 | gdb_os_evprintf_filtered (p, format, ap) | |
298 | host_callback *p; | |
299 | char *format; | |
300 | va_list ap; | |
301 | #endif | |
302 | { | |
303 | vfprintf_filtered (gdb_stderr, format, ap); | |
304 | } | |
305 | ||
306 | /* GDB version of error callback. */ | |
307 | ||
308 | /* VARARGS */ | |
309 | static void | |
310 | #ifdef ANSI_PROTOTYPES | |
311 | gdb_os_error (host_callback *p, const char *format, ...) | |
312 | #else | |
313 | gdb_os_error (p, va_alist) | |
314 | host_callback *p; | |
315 | va_dcl | |
316 | #endif | |
317 | { | |
318 | if (error_hook) | |
319 | (*error_hook) (); | |
320 | else | |
321 | { | |
322 | va_list args; | |
323 | #ifdef ANSI_PROTOTYPES | |
324 | va_start (args, format); | |
325 | #else | |
326 | char *format; | |
327 | ||
328 | va_start (args); | |
329 | format = va_arg (args, char *); | |
330 | #endif | |
331 | ||
332 | error_begin (); | |
333 | vfprintf_filtered (gdb_stderr, format, args); | |
334 | fprintf_filtered (gdb_stderr, "\n"); | |
335 | va_end (args); | |
336 | return_to_top_level (RETURN_ERROR); | |
337 | } | |
338 | } | |
339 | ||
340 | static void | |
341 | gdbsim_fetch_register (regno) | |
342 | int regno; | |
343 | { | |
344 | static int warn_user = 1; | |
345 | if (regno == -1) | |
346 | { | |
347 | for (regno = 0; regno < NUM_REGS; regno++) | |
348 | gdbsim_fetch_register (regno); | |
349 | } | |
350 | else if (REGISTER_NAME (regno) != NULL && *REGISTER_NAME (regno) != '\0') | |
351 | { | |
352 | char buf[MAX_REGISTER_RAW_SIZE]; | |
353 | int nr_bytes = sim_fetch_register (gdbsim_desc, regno, buf, REGISTER_RAW_SIZE (regno)); | |
354 | if (nr_bytes == 0) | |
355 | /* register not applicable, supply zero's */ | |
356 | memset (buf, 0, MAX_REGISTER_RAW_SIZE); | |
357 | else if (nr_bytes > 0 && nr_bytes != REGISTER_RAW_SIZE (regno) | |
358 | && warn_user) | |
359 | { | |
360 | printf_unfiltered ("Size of register %s (%d) incorrect (%d instead of %d))", | |
361 | REGISTER_NAME (regno), regno, | |
362 | nr_bytes, REGISTER_RAW_SIZE (regno)); | |
363 | warn_user = 0; | |
364 | } | |
365 | supply_register (regno, buf); | |
366 | if (sr_get_debug ()) | |
367 | { | |
368 | printf_filtered ("gdbsim_fetch_register: %d", regno); | |
369 | /* FIXME: We could print something more intelligible. */ | |
370 | dump_mem (buf, REGISTER_RAW_SIZE (regno)); | |
371 | } | |
372 | } | |
373 | } | |
374 | ||
375 | ||
376 | static void | |
377 | gdbsim_store_register (regno) | |
378 | int regno; | |
379 | { | |
380 | if (regno == -1) | |
381 | { | |
382 | for (regno = 0; regno < NUM_REGS; regno++) | |
383 | gdbsim_store_register (regno); | |
384 | } | |
385 | else if (REGISTER_NAME (regno) != NULL && *REGISTER_NAME (regno) != '\0') | |
386 | { | |
387 | char tmp[MAX_REGISTER_RAW_SIZE]; | |
388 | int nr_bytes; | |
389 | read_register_gen (regno, tmp); | |
390 | nr_bytes = sim_store_register (gdbsim_desc, regno, tmp, REGISTER_RAW_SIZE (regno)); | |
391 | if (nr_bytes > 0 && nr_bytes != REGISTER_RAW_SIZE (regno)) | |
392 | fatal ("Register size different to expected"); | |
393 | if (sr_get_debug ()) | |
394 | { | |
395 | printf_filtered ("gdbsim_store_register: %d", regno); | |
396 | /* FIXME: We could print something more intelligible. */ | |
397 | dump_mem (tmp, REGISTER_RAW_SIZE (regno)); | |
398 | } | |
399 | } | |
400 | } | |
401 | ||
402 | /* Kill the running program. This may involve closing any open files | |
403 | and releasing other resources acquired by the simulated program. */ | |
404 | ||
405 | static void | |
406 | gdbsim_kill () | |
407 | { | |
408 | if (sr_get_debug ()) | |
409 | printf_filtered ("gdbsim_kill\n"); | |
410 | ||
411 | /* There is no need to `kill' running simulator - the simulator is | |
412 | not running */ | |
413 | inferior_pid = 0; | |
414 | } | |
415 | ||
416 | /* Load an executable file into the target process. This is expected to | |
417 | not only bring new code into the target process, but also to update | |
418 | GDB's symbol tables to match. */ | |
419 | ||
420 | static void | |
421 | gdbsim_load (prog, fromtty) | |
422 | char *prog; | |
423 | int fromtty; | |
424 | { | |
425 | if (sr_get_debug ()) | |
426 | printf_filtered ("gdbsim_load: prog \"%s\"\n", prog); | |
427 | ||
428 | inferior_pid = 0; | |
429 | ||
430 | /* FIXME: We will print two messages on error. | |
431 | Need error to either not print anything if passed NULL or need | |
432 | another routine that doesn't take any arguments. */ | |
433 | if (sim_load (gdbsim_desc, prog, NULL, fromtty) == SIM_RC_FAIL) | |
434 | error ("unable to load program"); | |
435 | ||
436 | /* FIXME: If a load command should reset the targets registers then | |
437 | a call to sim_create_inferior() should go here. */ | |
438 | ||
439 | program_loaded = 1; | |
440 | } | |
441 | ||
442 | ||
443 | /* Start an inferior process and set inferior_pid to its pid. | |
444 | EXEC_FILE is the file to run. | |
445 | ARGS is a string containing the arguments to the program. | |
446 | ENV is the environment vector to pass. Errors reported with error(). | |
447 | On VxWorks and various standalone systems, we ignore exec_file. */ | |
448 | /* This is called not only when we first attach, but also when the | |
449 | user types "run" after having attached. */ | |
450 | ||
451 | static void | |
452 | gdbsim_create_inferior (exec_file, args, env) | |
453 | char *exec_file; | |
454 | char *args; | |
455 | char **env; | |
456 | { | |
457 | int len; | |
458 | char *arg_buf,**argv; | |
459 | ||
460 | if (exec_file == 0 || exec_bfd == 0) | |
461 | warning ("No executable file specified."); | |
462 | if (! program_loaded) | |
463 | warning ("No program loaded."); | |
464 | ||
465 | if (sr_get_debug ()) | |
466 | printf_filtered ("gdbsim_create_inferior: exec_file \"%s\", args \"%s\"\n", | |
467 | (exec_file ? exec_file: "(NULL)"), | |
468 | args); | |
469 | ||
470 | gdbsim_kill (); | |
471 | remove_breakpoints (); | |
472 | init_wait_for_inferior (); | |
473 | ||
474 | if (exec_file != NULL) | |
475 | { | |
476 | len = strlen (exec_file) + 1 + strlen (args) + 1 + /*slop*/ 10; | |
477 | arg_buf = (char *) alloca (len); | |
478 | arg_buf[0] = '\0'; | |
479 | strcat (arg_buf, exec_file); | |
480 | strcat (arg_buf, " "); | |
481 | strcat (arg_buf, args); | |
482 | argv = buildargv (arg_buf); | |
7a292a7a | 483 | make_cleanup_freeargv (argv); |
c906108c SS |
484 | } |
485 | else | |
486 | argv = NULL; | |
487 | sim_create_inferior (gdbsim_desc, exec_bfd, argv, env); | |
488 | ||
489 | inferior_pid = 42; | |
490 | insert_breakpoints (); /* Needed to get correct instruction in cache */ | |
491 | ||
492 | clear_proceed_status (); | |
493 | ||
494 | /* NB: Entry point already set by sim_create_inferior. */ | |
495 | proceed ((CORE_ADDR)-1, TARGET_SIGNAL_DEFAULT, 0); | |
496 | } | |
497 | ||
498 | /* The open routine takes the rest of the parameters from the command, | |
499 | and (if successful) pushes a new target onto the stack. | |
500 | Targets should supply this routine, if only to provide an error message. */ | |
501 | /* Called when selecting the simulator. EG: (gdb) target sim name. */ | |
502 | ||
503 | static void | |
504 | gdbsim_open (args, from_tty) | |
505 | char *args; | |
506 | int from_tty; | |
507 | { | |
508 | int len; | |
509 | char *arg_buf; | |
510 | char **argv; | |
511 | ||
512 | if (sr_get_debug ()) | |
513 | printf_filtered ("gdbsim_open: args \"%s\"\n", args ? args : "(null)"); | |
514 | ||
515 | /* Remove current simulator if one exists. Only do this if the simulator | |
516 | has been opened because sim_close requires it. | |
517 | This is important because the call to push_target below will cause | |
518 | sim_close to be called if the simulator is already open, but push_target | |
519 | is called after sim_open! We can't move the call to push_target before | |
520 | the call to sim_open because sim_open may invoke `error'. */ | |
521 | if (gdbsim_desc != NULL) | |
522 | unpush_target (&gdbsim_ops); | |
523 | ||
524 | len = (7 + 1 /* gdbsim */ | |
525 | + strlen (" -E little") | |
526 | + strlen (" --architecture=xxxxxxxxxx") | |
527 | + (args ? strlen (args) : 0) | |
528 | + 50) /* slack */; | |
529 | arg_buf = (char *) alloca (len); | |
530 | strcpy (arg_buf, "gdbsim"); /* 7 */ | |
531 | /* Specify the byte order for the target when it is both selectable | |
532 | and explicitly specified by the user (not auto detected). */ | |
533 | if (TARGET_BYTE_ORDER_SELECTABLE_P | |
534 | && !TARGET_BYTE_ORDER_AUTO) | |
535 | { | |
536 | switch (TARGET_BYTE_ORDER) | |
537 | { | |
538 | case BIG_ENDIAN: | |
539 | strcat (arg_buf, " -E big"); | |
540 | break; | |
541 | case LITTLE_ENDIAN: | |
542 | strcat (arg_buf, " -E little"); | |
543 | break; | |
544 | default: | |
545 | fatal ("Value of TARGET_BYTE_ORDER unknown"); | |
546 | } | |
547 | } | |
548 | /* Specify the architecture of the target when it has been | |
549 | explicitly specified */ | |
550 | if (!TARGET_ARCHITECTURE_AUTO) | |
551 | { | |
552 | strcat (arg_buf, " --architecture="); | |
553 | strcat (arg_buf, TARGET_ARCHITECTURE->printable_name); | |
554 | } | |
555 | /* finally, any explicit args */ | |
556 | if (args) | |
557 | { | |
558 | strcat (arg_buf, " "); /* 1 */ | |
559 | strcat (arg_buf, args); | |
560 | } | |
561 | argv = buildargv (arg_buf); | |
562 | if (argv == NULL) | |
563 | error ("Insufficient memory available to allocate simulator arg list."); | |
7a292a7a | 564 | make_cleanup_freeargv (argv); |
c906108c SS |
565 | |
566 | init_callbacks (); | |
567 | gdbsim_desc = sim_open (SIM_OPEN_DEBUG, &gdb_callback, exec_bfd, argv); | |
568 | ||
569 | if (gdbsim_desc == 0) | |
570 | error ("unable to create simulator instance"); | |
571 | ||
572 | push_target (&gdbsim_ops); | |
573 | target_fetch_registers (-1); | |
574 | printf_filtered ("Connected to the simulator.\n"); | |
575 | } | |
576 | ||
577 | /* Does whatever cleanup is required for a target that we are no longer | |
578 | going to be calling. Argument says whether we are quitting gdb and | |
579 | should not get hung in case of errors, or whether we want a clean | |
580 | termination even if it takes a while. This routine is automatically | |
581 | always called just before a routine is popped off the target stack. | |
582 | Closing file descriptors and freeing memory are typical things it should | |
583 | do. */ | |
584 | /* Close out all files and local state before this target loses control. */ | |
585 | ||
586 | static void | |
587 | gdbsim_close (quitting) | |
588 | int quitting; | |
589 | { | |
590 | if (sr_get_debug ()) | |
591 | printf_filtered ("gdbsim_close: quitting %d\n", quitting); | |
592 | ||
593 | program_loaded = 0; | |
594 | ||
595 | if (gdbsim_desc != NULL) | |
596 | { | |
597 | sim_close (gdbsim_desc, quitting); | |
598 | gdbsim_desc = NULL; | |
599 | } | |
600 | ||
601 | end_callbacks (); | |
602 | } | |
603 | ||
604 | /* Takes a program previously attached to and detaches it. | |
605 | The program may resume execution (some targets do, some don't) and will | |
606 | no longer stop on signals, etc. We better not have left any breakpoints | |
607 | in the program or it'll die when it hits one. ARGS is arguments | |
608 | typed by the user (e.g. a signal to send the process). FROM_TTY | |
609 | says whether to be verbose or not. */ | |
610 | /* Terminate the open connection to the remote debugger. | |
611 | Use this when you want to detach and do something else with your gdb. */ | |
612 | ||
613 | static void | |
614 | gdbsim_detach (args,from_tty) | |
615 | char *args; | |
616 | int from_tty; | |
617 | { | |
618 | if (sr_get_debug ()) | |
619 | printf_filtered ("gdbsim_detach: args \"%s\"\n", args); | |
620 | ||
621 | pop_target (); /* calls gdbsim_close to do the real work */ | |
622 | if (from_tty) | |
623 | printf_filtered ("Ending simulator %s debugging\n", target_shortname); | |
624 | } | |
625 | ||
626 | /* Resume execution of the target process. STEP says whether to single-step | |
627 | or to run free; SIGGNAL is the signal value (e.g. SIGINT) to be given | |
628 | to the target, or zero for no signal. */ | |
629 | ||
630 | static enum target_signal resume_siggnal; | |
631 | static int resume_step; | |
632 | ||
633 | static void | |
634 | gdbsim_resume (pid, step, siggnal) | |
635 | int pid, step; | |
636 | enum target_signal siggnal; | |
637 | { | |
638 | if (inferior_pid != 42) | |
639 | error ("The program is not being run."); | |
640 | ||
641 | if (sr_get_debug ()) | |
642 | printf_filtered ("gdbsim_resume: step %d, signal %d\n", step, siggnal); | |
643 | ||
644 | resume_siggnal = siggnal; | |
645 | resume_step = step; | |
646 | } | |
647 | ||
648 | /* Notify the simulator of an asynchronous request to stop. | |
649 | ||
650 | The simulator shall ensure that the stop request is eventually | |
651 | delivered to the simulator. If the call is made while the | |
652 | simulator is not running then the stop request is processed when | |
653 | the simulator is next resumed. | |
654 | ||
655 | For simulators that do not support this operation, just abort */ | |
656 | ||
657 | static void | |
658 | gdbsim_stop () | |
659 | { | |
660 | if (! sim_stop (gdbsim_desc)) | |
661 | { | |
662 | quit (); | |
663 | } | |
664 | } | |
665 | ||
666 | /* GDB version of os_poll_quit callback. | |
667 | Taken from gdb/util.c - should be in a library */ | |
668 | ||
669 | static int | |
670 | gdb_os_poll_quit (p) | |
671 | host_callback *p; | |
672 | { | |
7a292a7a SS |
673 | if (ui_loop_hook != NULL) |
674 | ui_loop_hook (0); | |
675 | ||
c906108c SS |
676 | notice_quit (); |
677 | if (quit_flag) /* gdb's idea of quit */ | |
678 | { | |
679 | quit_flag = 0; /* we've stolen it */ | |
680 | return 1; | |
681 | } | |
682 | else if (immediate_quit) | |
683 | { | |
684 | return 1; | |
685 | } | |
686 | return 0; | |
687 | } | |
688 | ||
689 | /* Wait for inferior process to do something. Return pid of child, | |
690 | or -1 in case of error; store status through argument pointer STATUS, | |
691 | just as `wait' would. */ | |
692 | ||
693 | static void | |
694 | gdbsim_cntrl_c (signo) | |
695 | int signo; | |
696 | { | |
697 | gdbsim_stop (); | |
698 | } | |
699 | ||
700 | static int | |
701 | gdbsim_wait (pid, status) | |
702 | int pid; | |
703 | struct target_waitstatus *status; | |
704 | { | |
705 | static RETSIGTYPE (*prev_sigint) (); | |
706 | int sigrc = 0; | |
707 | enum sim_stop reason = sim_running; | |
708 | ||
709 | if (sr_get_debug ()) | |
710 | printf_filtered ("gdbsim_wait\n"); | |
711 | ||
712 | #if defined (HAVE_SIGACTION) && defined (SA_RESTART) | |
713 | { | |
714 | struct sigaction sa, osa; | |
715 | sa.sa_handler = gdbsim_cntrl_c; | |
716 | sigemptyset (&sa.sa_mask); | |
717 | sa.sa_flags = 0; | |
718 | sigaction (SIGINT, &sa, &osa); | |
719 | prev_sigint = osa.sa_handler; | |
720 | } | |
721 | #else | |
722 | prev_sigint = signal (SIGINT, gdbsim_cntrl_c); | |
723 | #endif | |
724 | sim_resume (gdbsim_desc, resume_step, | |
725 | target_signal_to_host (resume_siggnal)); | |
726 | signal (SIGINT, prev_sigint); | |
727 | resume_step = 0; | |
728 | ||
729 | sim_stop_reason (gdbsim_desc, &reason, &sigrc); | |
730 | ||
731 | switch (reason) | |
732 | { | |
733 | case sim_exited: | |
734 | status->kind = TARGET_WAITKIND_EXITED; | |
735 | status->value.integer = sigrc; | |
736 | break; | |
737 | case sim_stopped: | |
738 | switch (sigrc) | |
739 | { | |
740 | case SIGABRT: | |
741 | quit (); | |
742 | break; | |
743 | case SIGINT: | |
744 | case SIGTRAP: | |
745 | default: | |
746 | status->kind = TARGET_WAITKIND_STOPPED; | |
747 | /* The signal in sigrc is a host signal. That probably | |
748 | should be fixed. */ | |
749 | status->value.sig = target_signal_from_host (sigrc); | |
750 | break; | |
751 | } | |
752 | break; | |
753 | case sim_signalled: | |
754 | status->kind = TARGET_WAITKIND_SIGNALLED; | |
755 | /* The signal in sigrc is a host signal. That probably | |
756 | should be fixed. */ | |
757 | status->value.sig = target_signal_from_host (sigrc); | |
758 | break; | |
759 | case sim_running: | |
760 | case sim_polling: | |
761 | /* FIXME: Is this correct? */ | |
762 | break; | |
763 | } | |
764 | ||
765 | return inferior_pid; | |
766 | } | |
767 | ||
768 | /* Get ready to modify the registers array. On machines which store | |
769 | individual registers, this doesn't need to do anything. On machines | |
770 | which store all the registers in one fell swoop, this makes sure | |
771 | that registers contains all the registers from the program being | |
772 | debugged. */ | |
773 | ||
774 | static void | |
775 | gdbsim_prepare_to_store () | |
776 | { | |
777 | /* Do nothing, since we can store individual regs */ | |
778 | } | |
779 | ||
780 | static int | |
781 | gdbsim_xfer_inferior_memory (memaddr, myaddr, len, write, target) | |
782 | CORE_ADDR memaddr; | |
783 | char *myaddr; | |
784 | int len; | |
785 | int write; | |
786 | struct target_ops *target; /* ignored */ | |
787 | { | |
788 | if (! program_loaded) | |
789 | error ("No program loaded."); | |
790 | ||
791 | if (sr_get_debug ()) | |
792 | { | |
793 | printf_filtered ("gdbsim_xfer_inferior_memory: myaddr 0x%x, memaddr 0x%x, len %d, write %d\n", | |
794 | myaddr, memaddr, len, write); | |
795 | if (sr_get_debug () && write) | |
796 | dump_mem(myaddr, len); | |
797 | } | |
798 | ||
799 | if (write) | |
800 | { | |
801 | len = sim_write (gdbsim_desc, memaddr, myaddr, len); | |
802 | } | |
803 | else | |
804 | { | |
805 | len = sim_read (gdbsim_desc, memaddr, myaddr, len); | |
806 | if (sr_get_debug () && len > 0) | |
807 | dump_mem(myaddr, len); | |
808 | } | |
809 | return len; | |
810 | } | |
811 | ||
812 | static void | |
813 | gdbsim_files_info (target) | |
814 | struct target_ops *target; | |
815 | { | |
816 | char *file = "nothing"; | |
817 | ||
818 | if (exec_bfd) | |
819 | file = bfd_get_filename (exec_bfd); | |
820 | ||
821 | if (sr_get_debug ()) | |
822 | printf_filtered ("gdbsim_files_info: file \"%s\"\n", file); | |
823 | ||
824 | if (exec_bfd) | |
825 | { | |
826 | printf_filtered ("\tAttached to %s running program %s\n", | |
827 | target_shortname, file); | |
828 | sim_info (gdbsim_desc, 0); | |
829 | } | |
830 | } | |
831 | ||
832 | /* Clear the simulator's notion of what the break points are. */ | |
833 | ||
834 | static void | |
835 | gdbsim_mourn_inferior () | |
836 | { | |
837 | if (sr_get_debug ()) | |
838 | printf_filtered ("gdbsim_mourn_inferior:\n"); | |
839 | ||
840 | remove_breakpoints (); | |
841 | generic_mourn_inferior (); | |
842 | } | |
843 | ||
844 | static int | |
845 | gdbsim_insert_breakpoint (addr, contents_cache) | |
846 | CORE_ADDR addr; | |
847 | char *contents_cache; | |
848 | { | |
849 | #ifdef SIM_HAS_BREAKPOINTS | |
850 | SIM_RC retcode; | |
851 | ||
852 | retcode = sim_set_breakpoint (gdbsim_desc, addr); | |
853 | ||
854 | switch (retcode) | |
855 | { | |
856 | case SIM_RC_OK: | |
857 | return 0; | |
858 | case SIM_RC_INSUFFICIENT_RESOURCES: | |
859 | return ENOMEM; | |
860 | default: | |
861 | return EIO; | |
862 | } | |
863 | #else | |
864 | return memory_insert_breakpoint (addr, contents_cache); | |
865 | #endif | |
866 | } | |
867 | ||
868 | static int | |
869 | gdbsim_remove_breakpoint (addr, contents_cache) | |
870 | CORE_ADDR addr; | |
871 | char *contents_cache; | |
872 | { | |
873 | #ifdef SIM_HAS_BREAKPOINTS | |
874 | SIM_RC retcode; | |
875 | ||
876 | retcode = sim_clear_breakpoint (gdbsim_desc, addr); | |
877 | ||
878 | switch (retcode) | |
879 | { | |
880 | case SIM_RC_OK: | |
881 | case SIM_RC_UNKNOWN_BREAKPOINT: | |
882 | return 0; | |
883 | case SIM_RC_INSUFFICIENT_RESOURCES: | |
884 | return ENOMEM; | |
885 | default: | |
886 | return EIO; | |
887 | } | |
888 | #else | |
889 | return memory_remove_breakpoint (addr, contents_cache); | |
890 | #endif | |
891 | } | |
892 | ||
893 | /* Pass the command argument through to the simulator verbatim. The | |
894 | simulator must do any command interpretation work. */ | |
895 | ||
896 | void | |
897 | simulator_command (args, from_tty) | |
898 | char *args; | |
899 | int from_tty; | |
900 | { | |
901 | if (gdbsim_desc == NULL) | |
902 | { | |
903 | ||
904 | /* PREVIOUSLY: The user may give a command before the simulator | |
905 | is opened. [...] (??? assuming of course one wishes to | |
906 | continue to allow commands to be sent to unopened simulators, | |
907 | which isn't entirely unreasonable). */ | |
908 | ||
909 | /* The simulator is a builtin abstraction of a remote target. | |
910 | Consistent with that model, access to the simulator, via sim | |
911 | commands, is restricted to the period when the channel to the | |
912 | simulator is open. */ | |
913 | ||
914 | error ("Not connected to the simulator target"); | |
915 | } | |
916 | ||
917 | sim_do_command (gdbsim_desc, args); | |
918 | ||
919 | /* Invalidate the register cache, in case the simulator command does | |
920 | something funny. */ | |
921 | registers_changed (); | |
922 | } | |
923 | ||
924 | /* Define the target subroutine names */ | |
925 | ||
926 | struct target_ops gdbsim_ops ; | |
927 | ||
928 | static void | |
929 | init_gdbsim_ops(void) | |
930 | { | |
931 | gdbsim_ops.to_shortname = "sim"; | |
932 | gdbsim_ops.to_longname = "simulator"; | |
933 | gdbsim_ops.to_doc = "Use the compiled-in simulator."; | |
934 | gdbsim_ops.to_open = gdbsim_open; | |
935 | gdbsim_ops.to_close = gdbsim_close; | |
936 | gdbsim_ops.to_attach = NULL; | |
937 | gdbsim_ops.to_post_attach = NULL; | |
938 | gdbsim_ops.to_require_attach = NULL; | |
939 | gdbsim_ops.to_detach = gdbsim_detach; | |
940 | gdbsim_ops.to_require_detach = NULL; | |
941 | gdbsim_ops.to_resume = gdbsim_resume; | |
942 | gdbsim_ops.to_wait = gdbsim_wait; | |
943 | gdbsim_ops.to_post_wait = NULL; | |
944 | gdbsim_ops.to_fetch_registers = gdbsim_fetch_register; | |
945 | gdbsim_ops.to_store_registers = gdbsim_store_register; | |
946 | gdbsim_ops.to_prepare_to_store = gdbsim_prepare_to_store; | |
947 | gdbsim_ops.to_xfer_memory = gdbsim_xfer_inferior_memory; | |
948 | gdbsim_ops.to_files_info = gdbsim_files_info; | |
949 | gdbsim_ops.to_insert_breakpoint = gdbsim_insert_breakpoint; | |
950 | gdbsim_ops.to_remove_breakpoint = gdbsim_remove_breakpoint; | |
951 | gdbsim_ops.to_terminal_init = NULL; | |
952 | gdbsim_ops.to_terminal_inferior = NULL; | |
953 | gdbsim_ops.to_terminal_ours_for_output = NULL; | |
954 | gdbsim_ops.to_terminal_ours = NULL; | |
955 | gdbsim_ops.to_terminal_info = NULL; | |
956 | gdbsim_ops.to_kill = gdbsim_kill; | |
957 | gdbsim_ops.to_load = gdbsim_load; | |
958 | gdbsim_ops.to_lookup_symbol = NULL; | |
959 | gdbsim_ops.to_create_inferior = gdbsim_create_inferior; | |
960 | gdbsim_ops.to_post_startup_inferior = NULL; | |
961 | gdbsim_ops.to_acknowledge_created_inferior = NULL; | |
962 | gdbsim_ops.to_clone_and_follow_inferior = NULL; | |
963 | gdbsim_ops.to_post_follow_inferior_by_clone = NULL; | |
964 | gdbsim_ops.to_insert_fork_catchpoint = NULL; | |
965 | gdbsim_ops.to_remove_fork_catchpoint = NULL; | |
966 | gdbsim_ops.to_insert_vfork_catchpoint = NULL; | |
967 | gdbsim_ops.to_remove_vfork_catchpoint = NULL; | |
968 | gdbsim_ops.to_has_forked = NULL; | |
969 | gdbsim_ops.to_has_vforked = NULL; | |
970 | gdbsim_ops.to_can_follow_vfork_prior_to_exec = NULL; | |
971 | gdbsim_ops.to_post_follow_vfork = NULL; | |
972 | gdbsim_ops.to_insert_exec_catchpoint = NULL; | |
973 | gdbsim_ops.to_remove_exec_catchpoint = NULL; | |
974 | gdbsim_ops.to_has_execd = NULL; | |
975 | gdbsim_ops.to_reported_exec_events_per_exec_call = NULL; | |
976 | gdbsim_ops.to_has_exited = NULL; | |
977 | gdbsim_ops.to_mourn_inferior = gdbsim_mourn_inferior; | |
978 | gdbsim_ops.to_can_run = 0; | |
979 | gdbsim_ops.to_notice_signals = 0; | |
980 | gdbsim_ops.to_thread_alive = 0; | |
981 | gdbsim_ops.to_stop = gdbsim_stop; | |
982 | gdbsim_ops.to_pid_to_exec_file = NULL; | |
983 | gdbsim_ops.to_core_file_to_sym_file = NULL; | |
984 | gdbsim_ops.to_stratum = process_stratum; | |
985 | gdbsim_ops.DONT_USE = NULL; | |
986 | gdbsim_ops.to_has_all_memory = 1; | |
987 | gdbsim_ops.to_has_memory = 1; | |
988 | gdbsim_ops.to_has_stack = 1; | |
989 | gdbsim_ops.to_has_registers = 1; | |
990 | gdbsim_ops.to_has_execution = 1; | |
991 | gdbsim_ops.to_sections = NULL; | |
992 | gdbsim_ops.to_sections_end = NULL; | |
993 | gdbsim_ops.to_magic = OPS_MAGIC; | |
994 | ||
995 | #ifdef TARGET_REDEFINE_DEFAULT_OPS | |
996 | TARGET_REDEFINE_DEFAULT_OPS (&gdbsim_ops); | |
997 | #endif | |
998 | } | |
999 | ||
1000 | void | |
1001 | _initialize_remote_sim () | |
1002 | { | |
1003 | init_gdbsim_ops() ; | |
1004 | add_target (&gdbsim_ops); | |
1005 | ||
1006 | add_com ("sim <command>", class_obscure, simulator_command, | |
1007 | "Send a command to the simulator."); | |
1008 | } |