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[dragonfly.git] / sys / ddb / db_command.c
blobe347134b6fcfb57070052653df815ea7a5556bf0
1 /*
2 * Mach Operating System
3 * Copyright (c) 1991,1990 Carnegie Mellon University
4 * All Rights Reserved.
5 *
6 * Permission to use, copy, modify and distribute this software and its
7 * documentation is hereby granted, provided that both the copyright
8 * notice and this permission notice appear in all copies of the
9 * software, derivative works or modified versions, and any portions
10 * thereof, and that both notices appear in supporting documentation.
11 *
12 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS
13 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
14 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
15 *
16 * Carnegie Mellon requests users of this software to return to
17 *
18 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
19 * School of Computer Science
20 * Carnegie Mellon University
21 * Pittsburgh PA 15213-3890
22 *
23 * any improvements or extensions that they make and grant Carnegie the
24 * rights to redistribute these changes.
25 *
26 * $FreeBSD: src/sys/ddb/db_command.c,v 1.34.2.2 2001/07/29 22:48:36 kris Exp $
27 * $DragonFly: src/sys/ddb/db_command.c,v 1.8 2005/06/14 13:25:40 joerg Exp $
28 */
29
30 /*
31 * Author: David B. Golub, Carnegie Mellon University
32 * Date: 7/90
33 */
34
35 /*
36 * Command dispatcher.
37 */
38 #include <sys/param.h>
39 #include <sys/linker_set.h>
40 #include <sys/reboot.h>
41 #include <sys/systm.h>
42 #include <sys/cons.h>
43
44 #include <ddb/ddb.h>
45 #include <ddb/db_command.h>
46 #include <ddb/db_lex.h>
47 #include <ddb/db_output.h>
48
49 #include <machine/md_var.h> /* needed for db_reset() */
50
51 #include <setjmp.h>
52
53 /*
54 * Exported global variables
55 */
56 boolean_t db_cmd_loop_done;
57 db_addr_t db_dot;
58 jmp_buf db_jmpbuf;
59 db_addr_t db_last_addr;
60 db_addr_t db_prev;
61 db_addr_t db_next;
62
63 SET_DECLARE(db_cmd_set, struct command);
64 SET_DECLARE(db_show_cmd_set, struct command);
65
66 static db_cmdfcn_t db_fncall;
67 static db_cmdfcn_t db_gdb;
68 static db_cmdfcn_t db_reset;
69
70 static struct command db_show_cmds[];
71
72 /*
73 * if 'ed' style: 'dot' is set at start of last item printed,
74 * and '+' points to next line.
75 * Otherwise: 'dot' points to next item, '..' points to last.
76 */
77 static boolean_t db_ed_style = TRUE;
78
79 /*
80 * Utility routine - discard tokens through end-of-line.
81 */
82 void
83 db_skip_to_eol()
84 {
85 int t;
86 do {
87 t = db_read_token();
88 } while (t != tEOL);
89 }
90
91 /*
92 * Results of command search.
93 */
94 #define CMD_UNIQUE 0
95 #define CMD_FOUND 1
96 #define CMD_NONE 2
97 #define CMD_AMBIGUOUS 3
98 #define CMD_HELP 4
99
100 static void db_cmd_list (struct command *table,
101 struct command **aux_tablep,
102 struct command **aux_tablep_end);
103 static int db_cmd_search (char *name, struct command *table,
104 struct command **aux_tablep,
105 struct command **aux_tablep_end,
106 struct command **cmdp);
107 static void db_command (struct command **last_cmdp,
108 struct command *cmd_table,
109 struct command **aux_cmd_tablep,
110 struct command **aux_cmd_tablep_end);
111
112 /*
113 * Search for command prefix.
114 */
115 static int
116 db_cmd_search(name, table, aux_tablep, aux_tablep_end, cmdp)
117 char * name;
118 struct command *table;
119 struct command **aux_tablep;
120 struct command **aux_tablep_end;
121 struct command **cmdp; /* out */
122 {
123 struct command *cmd;
124 struct command **aux_cmdp;
125 int result = CMD_NONE;
126
127 for (cmd = table; cmd->name != 0; cmd++) {
128 char *lp;
129 char *rp;
130 int c;
131
132 lp = name;
133 rp = cmd->name;
134 while ((c = *lp) == *rp) {
135 if (c == 0) {
136 /* complete match */
137 *cmdp = cmd;
138 return (CMD_UNIQUE);
139 }
140 lp++;
141 rp++;
142 }
143 if (c == 0) {
144 /* end of name, not end of command -
145 partial match */
146 if (result == CMD_FOUND) {
147 result = CMD_AMBIGUOUS;
148 /* but keep looking for a full match -
149 this lets us match single letters */
150 }
151 else {
152 *cmdp = cmd;
153 result = CMD_FOUND;
154 }
155 }
156 }
157 if (result == CMD_NONE && aux_tablep != 0)
158 /* XXX repeat too much code. */
159 for (aux_cmdp = aux_tablep; aux_cmdp < aux_tablep_end; aux_cmdp++) {
160 char *lp;
161 char *rp;
162 int c;
163
164 lp = name;
165 rp = (*aux_cmdp)->name;
166 while ((c = *lp) == *rp) {
167 if (c == 0) {
168 /* complete match */
169 *cmdp = *aux_cmdp;
170 return (CMD_UNIQUE);
171 }
172 lp++;
173 rp++;
174 }
175 if (c == 0) {
176 /* end of name, not end of command -
177 partial match */
178 if (result == CMD_FOUND) {
179 result = CMD_AMBIGUOUS;
180 /* but keep looking for a full match -
181 this lets us match single letters */
182 }
183 else {
184 *cmdp = *aux_cmdp;
185 result = CMD_FOUND;
186 }
187 }
188 }
189 if (result == CMD_NONE) {
190 /* check for 'help' */
191 if (name[0] == 'h' && name[1] == 'e'
192 && name[2] == 'l' && name[3] == 'p')
193 result = CMD_HELP;
194 }
195 return (result);
196 }
197
198 static void
199 db_cmd_list(table, aux_tablep, aux_tablep_end)
200 struct command *table;
201 struct command **aux_tablep;
202 struct command **aux_tablep_end;
203 {
204 struct command *cmd;
205 struct command **aux_cmdp;
206
207 for (cmd = table; cmd->name != 0; cmd++) {
208 db_printf("%-12s", cmd->name);
209 db_end_line();
210 }
211 if (aux_tablep == 0)
212 return;
213 for (aux_cmdp = aux_tablep; aux_cmdp < aux_tablep_end; aux_cmdp++) {
214 db_printf("%-12s", (*aux_cmdp)->name);
215 db_end_line();
216 }
217 }
218
219 static void
220 db_command(last_cmdp, cmd_table, aux_cmd_tablep, aux_cmd_tablep_end)
221 struct command **last_cmdp; /* IN_OUT */
222 struct command *cmd_table;
223 struct command **aux_cmd_tablep;
224 struct command **aux_cmd_tablep_end;
225 {
226 struct command *cmd;
227 int t;
228 char modif[TOK_STRING_SIZE];
229 db_expr_t addr, count;
230 boolean_t have_addr = FALSE;
231 int result;
232
233 t = db_read_token();
234 if (t == tEOL) {
235 /* empty line repeats last command, at 'next' */
236 cmd = *last_cmdp;
237 addr = (db_expr_t)db_next;
238 have_addr = FALSE;
239 count = 1;
240 modif[0] = '\0';
241 }
242 else if (t == tEXCL) {
243 db_fncall((db_expr_t)0, (boolean_t)0, (db_expr_t)0, (char *)0);
244 return;
245 }
246 else if (t != tIDENT) {
247 db_printf("?\n");
248 db_flush_lex();
249 return;
250 }
251 else {
252 /*
253 * Search for command
254 */
255 while (cmd_table) {
256 result = db_cmd_search(db_tok_string,
257 cmd_table,
258 aux_cmd_tablep,
259 aux_cmd_tablep_end,
260 &cmd);
261 switch (result) {
262 case CMD_NONE:
263 db_printf("No such command\n");
264 db_flush_lex();
265 return;
266 case CMD_AMBIGUOUS:
267 db_printf("Ambiguous\n");
268 db_flush_lex();
269 return;
270 case CMD_HELP:
271 db_cmd_list(cmd_table, aux_cmd_tablep, aux_cmd_tablep_end);
272 db_flush_lex();
273 return;
274 default:
275 break;
276 }
277 if ((cmd_table = cmd->more) != 0) {
278 /* XXX usually no more aux's. */
279 aux_cmd_tablep = 0;
280 if (cmd_table == db_show_cmds) {
281 aux_cmd_tablep = SET_BEGIN(db_show_cmd_set);
282 aux_cmd_tablep_end = SET_LIMIT(db_show_cmd_set);
283 }
284
285 t = db_read_token();
286 if (t != tIDENT) {
287 db_cmd_list(cmd_table, aux_cmd_tablep, aux_cmd_tablep_end);
288 db_flush_lex();
289 return;
290 }
291 }
292 }
293
294 if ((cmd->flag & CS_OWN) == 0) {
295 /*
296 * Standard syntax:
297 * command [/modifier] [addr] [,count]
298 */
299 t = db_read_token();
300 if (t == tSLASH) {
301 t = db_read_token();
302 if (t != tIDENT && t != tNUMBER) {
303 db_printf("Bad modifier\n");
304 db_flush_lex();
305 return;
306 }
307 db_strcpy(modif, db_tok_string);
308 }
309 else {
310 db_unread_token(t);
311 modif[0] = '\0';
312 }
313
314 if (db_expression(&addr)) {
315 db_dot = (db_addr_t) addr;
316 db_last_addr = db_dot;
317 have_addr = TRUE;
318 }
319 else {
320 addr = (db_expr_t) db_dot;
321 have_addr = FALSE;
322 }
323 t = db_read_token();
324 if (t == tCOMMA) {
325 if (!db_expression(&count)) {
326 db_printf("Count missing\n");
327 db_flush_lex();
328 return;
329 }
330 }
331 else {
332 db_unread_token(t);
333 count = -1;
334 }
335 if ((cmd->flag & CS_MORE) == 0) {
336 db_skip_to_eol();
337 }
338 }
339 }
340 *last_cmdp = cmd;
341 if (cmd != 0) {
342 /*
343 * Execute the command.
344 */
345 (*cmd->fcn)(addr, have_addr, count, modif);
346
347 if (cmd->flag & CS_SET_DOT) {
348 /*
349 * If command changes dot, set dot to
350 * previous address displayed (if 'ed' style).
351 */
352 if (db_ed_style) {
353 db_dot = db_prev;
354 }
355 else {
356 db_dot = db_next;
357 }
358 }
359 else {
360 /*
361 * If command does not change dot,
362 * set 'next' location to be the same.
363 */
364 db_next = db_dot;
365 }
366 }
367 }
368
369 /*
370 * 'show' commands
371 */
372
373 static struct command db_show_all_cmds[] = {
374 #if 0
375 { "threads", db_show_all_threads, 0, 0 },
376 #endif
377 { "procs", db_ps, 0, 0 },
378 { (char *)0 }
379 };
380
381 static struct command db_show_cmds[] = {
382 { "all", 0, 0, db_show_all_cmds },
383 { "registers", db_show_regs, 0, 0 },
384 { "breaks", db_listbreak_cmd, 0, 0 },
385 #if 0
386 { "thread", db_show_one_thread, 0, 0 },
387 #endif
388 #if 0
389 { "port", ipc_port_print, 0, 0 },
390 #endif
391 { (char *)0, }
392 };
393
394 static struct command db_command_table[] = {
395 { "print", db_print_cmd, 0, 0 },
396 { "p", db_print_cmd, 0, 0 },
397 { "examine", db_examine_cmd, CS_SET_DOT, 0 },
398 { "x", db_examine_cmd, CS_SET_DOT, 0 },
399 { "search", db_search_cmd, CS_OWN|CS_SET_DOT, 0 },
400 { "set", db_set_cmd, CS_OWN, 0 },
401 { "write", db_write_cmd, CS_MORE|CS_SET_DOT, 0 },
402 { "w", db_write_cmd, CS_MORE|CS_SET_DOT, 0 },
403 { "delete", db_delete_cmd, 0, 0 },
404 { "d", db_delete_cmd, 0, 0 },
405 { "break", db_breakpoint_cmd, 0, 0 },
406 { "dwatch", db_deletewatch_cmd, 0, 0 },
407 { "watch", db_watchpoint_cmd, CS_MORE,0 },
408 { "dhwatch", db_deletehwatch_cmd, 0, 0 },
409 { "hwatch", db_hwatchpoint_cmd, 0, 0 },
410 { "step", db_single_step_cmd, 0, 0 },
411 { "s", db_single_step_cmd, 0, 0 },
412 { "continue", db_continue_cmd, 0, 0 },
413 { "c", db_continue_cmd, 0, 0 },
414 { "until", db_trace_until_call_cmd,0, 0 },
415 { "next", db_trace_until_matching_cmd,0, 0 },
416 { "match", db_trace_until_matching_cmd,0, 0 },
417 { "trace", db_stack_trace_cmd, 0, 0 },
418 { "where", db_stack_trace_cmd, 0, 0 },
419 { "call", db_fncall, CS_OWN, 0 },
420 { "show", 0, 0, db_show_cmds },
421 { "ps", db_ps, 0, 0 },
422 { "gdb", db_gdb, 0, 0 },
423 { "reset", db_reset, 0, 0 },
424 { (char *)0, }
425 };
426
427 static struct command *db_last_command = 0;
428
429 #if 0
430 void
431 db_help_cmd()
432 {
433 struct command *cmd = db_command_table;
434
435 while (cmd->name != 0) {
436 db_printf("%-12s", cmd->name);
437 db_end_line();
438 cmd++;
439 }
440 }
441 #endif
442
443 /*
444 * At least one non-optional command must be implemented using
445 * DB_COMMAND() so that db_cmd_set gets created. Here is one.
446 */
447 DB_COMMAND(panic, db_panic)
448 {
449 panic("from debugger");
450 }
451
452 void
453 db_command_loop()
454 {
455 /*
456 * Initialize 'prev' and 'next' to dot.
457 */
458 db_prev = db_dot;
459 db_next = db_dot;
460
461 db_cmd_loop_done = 0;
462 while (!db_cmd_loop_done) {
463
464 (void) setjmp(db_jmpbuf);
465 if (db_print_position() != 0)
466 db_printf("\n");
467
468 db_printf("db> ");
469 (void) db_read_line();
470
471 db_command(&db_last_command, db_command_table,
472 SET_BEGIN(db_cmd_set), SET_LIMIT(db_cmd_set));
473 }
474 }
475
476 void
477 db_error(s)
478 char *s;
479 {
480 if (s)
481 db_printf("%s", s);
482 db_flush_lex();
483 longjmp(db_jmpbuf, 1);
484 }
485
486
487 /*
488 * Call random function:
489 * !expr(arg,arg,arg)
490 */
491 static void
492 db_fncall(dummy1, dummy2, dummy3, dummy4)
493 db_expr_t dummy1;
494 boolean_t dummy2;
495 db_expr_t dummy3;
496 char * dummy4;
497 {
498 db_expr_t fn_addr;
499 #define MAXARGS 11 /* XXX only 10 are passed */
500 db_expr_t args[MAXARGS];
501 int nargs = 0;
502 db_expr_t retval;
503 typedef db_expr_t fcn_10args_t (db_expr_t, db_expr_t, db_expr_t,
504 db_expr_t, db_expr_t, db_expr_t,
505 db_expr_t, db_expr_t, db_expr_t,
506 db_expr_t);
507 fcn_10args_t *func;
508 int t;
509
510 if (!db_expression(&fn_addr)) {
511 db_printf("Bad function\n");
512 db_flush_lex();
513 return;
514 }
515 func = (fcn_10args_t *)fn_addr; /* XXX */
516
517 t = db_read_token();
518 if (t == tLPAREN) {
519 if (db_expression(&args[0])) {
520 nargs++;
521 while ((t = db_read_token()) == tCOMMA) {
522 if (nargs == MAXARGS) {
523 db_printf("Too many arguments\n");
524 db_flush_lex();
525 return;
526 }
527 if (!db_expression(&args[nargs])) {
528 db_printf("Argument missing\n");
529 db_flush_lex();
530 return;
531 }
532 nargs++;
533 }
534 db_unread_token(t);
535 }
536 if (db_read_token() != tRPAREN) {
537 db_printf("?\n");
538 db_flush_lex();
539 return;
540 }
541 }
542 db_skip_to_eol();
543
544 while (nargs < MAXARGS) {
545 args[nargs++] = 0;
546 }
547
548 retval = (*func)(args[0], args[1], args[2], args[3], args[4],
549 args[5], args[6], args[7], args[8], args[9] );
550 db_printf("%#lr\n", (long)retval);
551 }
552
553 /* Enter GDB remote protocol debugger on the next trap. */
554
555 dev_t gdbdev = NODEV;
556 cn_getc_t *gdb_getc;
557 cn_putc_t *gdb_putc;
558
559 static void
560 db_gdb (dummy1, dummy2, dummy3, dummy4)
561 db_expr_t dummy1;
562 boolean_t dummy2;
563 db_expr_t dummy3;
564 char * dummy4;
565 {
566
567 if (gdbdev == NODEV) {
568 db_printf("No gdb port enabled. Set flag 0x80 on desired port\n");
569 db_printf("in your configuration file (currently sio only).\n");
570 return;
571 }
572 boothowto ^= RB_GDB;
573
574 db_printf("Next trap will enter %s\n",
575 boothowto & RB_GDB ? "GDB remote protocol mode"
576 : "DDB debugger");
577 }
578
579 static void
580 db_reset (
581 db_expr_t dummy1,
582 boolean_t dummy2,
583 db_expr_t dummy3,
584 char * dummy4
585 ) {
586
587 cpu_reset();
588 }
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