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AMD64 - Move fdisk and nextboot up one level and remove src/sbin/i386.
[dragonfly.git] / sys / ddb / db_command.c
blobbecb3b20dfffa55ad290299b6c391e90cc8790aa
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 1.12 2007/05/07 05:21:38 dillon 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(void)
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 * Parameters:
116 * cmdp: out
117 */
118 static int
119 db_cmd_search(char *name, struct command *table, struct command **aux_tablep,
120 struct command **aux_tablep_end, struct command **cmdp)
121 {
122 struct command *cmd;
123 struct command **aux_cmdp;
124 int result = CMD_NONE;
125
126 for (cmd = table; cmd->name != 0; cmd++) {
127 char *lp;
128 char *rp;
129 int c;
130
131 lp = name;
132 rp = cmd->name;
133 while ((c = *lp) == *rp) {
134 if (c == 0) {
135 /* complete match */
136 *cmdp = cmd;
137 return (CMD_UNIQUE);
138 }
139 lp++;
140 rp++;
141 }
142 if (c == 0) {
143 /* end of name, not end of command -
144 partial match */
145 if (result == CMD_FOUND) {
146 result = CMD_AMBIGUOUS;
147 /* but keep looking for a full match -
148 this lets us match single letters */
149 }
150 else {
151 *cmdp = cmd;
152 result = CMD_FOUND;
153 }
154 }
155 }
156 if (result == CMD_NONE && aux_tablep != 0)
157 /* XXX repeat too much code. */
158 for (aux_cmdp = aux_tablep; aux_cmdp < aux_tablep_end; aux_cmdp++) {
159 char *lp;
160 char *rp;
161 int c;
162
163 lp = name;
164 rp = (*aux_cmdp)->name;
165 while ((c = *lp) == *rp) {
166 if (c == 0) {
167 /* complete match */
168 *cmdp = *aux_cmdp;
169 return (CMD_UNIQUE);
170 }
171 lp++;
172 rp++;
173 }
174 if (c == 0) {
175 /* end of name, not end of command -
176 partial match */
177 if (result == CMD_FOUND) {
178 result = CMD_AMBIGUOUS;
179 /* but keep looking for a full match -
180 this lets us match single letters */
181 }
182 else {
183 *cmdp = *aux_cmdp;
184 result = CMD_FOUND;
185 }
186 }
187 }
188 if (result == CMD_NONE) {
189 /* check for 'help' */
190 if (name[0] == 'h' && name[1] == 'e'
191 && name[2] == 'l' && name[3] == 'p')
192 result = CMD_HELP;
193 }
194 return (result);
195 }
196
197 static void
198 db_cmd_list(struct command *table, struct command **aux_tablep,
199 struct command **aux_tablep_end)
200 {
201 struct command *cmd;
202 struct command **aux_cmdp;
203
204 for (cmd = table; cmd->name != 0; cmd++) {
205 db_printf("%-12s", cmd->name);
206 db_end_line();
207 }
208 if (aux_tablep == 0)
209 return;
210 for (aux_cmdp = aux_tablep; aux_cmdp < aux_tablep_end; aux_cmdp++) {
211 db_printf("%-12s", (*aux_cmdp)->name);
212 db_end_line();
213 }
214 }
215
216 /*
217 * Parameters:
218 * last_cmdp: IN_OUT
219 */
220 static void
221 db_command(struct command **last_cmdp, struct command *cmd_table,
222 struct command **aux_cmd_tablep, struct command **aux_cmd_tablep_end)
223 {
224 struct command *cmd;
225 int t;
226 char modif[TOK_STRING_SIZE];
227 db_expr_t addr, count;
228 boolean_t have_addr = FALSE;
229 int result;
230
231 t = db_read_token();
232 if (t == tEOL) {
233 /* empty line repeats last command, at 'next' */
234 cmd = *last_cmdp;
235 addr = (db_expr_t)db_next;
236 have_addr = FALSE;
237 count = 1;
238 modif[0] = '\0';
239 }
240 else if (t == tEXCL) {
241 db_fncall((db_expr_t)0, (boolean_t)0, (db_expr_t)0, NULL);
242 return;
243 }
244 else if (t != tIDENT) {
245 db_printf("?\n");
246 db_flush_lex();
247 return;
248 }
249 else {
250 /*
251 * Search for command
252 */
253 while (cmd_table) {
254 result = db_cmd_search(db_tok_string,
255 cmd_table,
256 aux_cmd_tablep,
257 aux_cmd_tablep_end,
258 &cmd);
259 switch (result) {
260 case CMD_NONE:
261 db_printf("No such command\n");
262 db_flush_lex();
263 return;
264 case CMD_AMBIGUOUS:
265 db_printf("Ambiguous\n");
266 db_flush_lex();
267 return;
268 case CMD_HELP:
269 db_cmd_list(cmd_table, aux_cmd_tablep, aux_cmd_tablep_end);
270 db_flush_lex();
271 return;
272 default:
273 break;
274 }
275 if ((cmd_table = cmd->more) != 0) {
276 /* XXX usually no more aux's. */
277 aux_cmd_tablep = 0;
278 if (cmd_table == db_show_cmds) {
279 aux_cmd_tablep = SET_BEGIN(db_show_cmd_set);
280 aux_cmd_tablep_end = SET_LIMIT(db_show_cmd_set);
281 }
282
283 t = db_read_token();
284 if (t != tIDENT) {
285 db_cmd_list(cmd_table, aux_cmd_tablep, aux_cmd_tablep_end);
286 db_flush_lex();
287 return;
288 }
289 }
290 }
291
292 if ((cmd->flag & CS_OWN) == 0) {
293 /*
294 * Standard syntax:
295 * command [/modifier] [addr] [,count]
296 */
297 t = db_read_token();
298 if (t == tSLASH) {
299 t = db_read_token();
300 if (t != tIDENT && t != tNUMBER) {
301 db_printf("Bad modifier\n");
302 db_flush_lex();
303 return;
304 }
305 db_strcpy(modif, db_tok_string);
306 }
307 else {
308 db_unread_token(t);
309 modif[0] = '\0';
310 }
311
312 if (db_expression(&addr)) {
313 db_dot = (db_addr_t) addr;
314 db_last_addr = db_dot;
315 have_addr = TRUE;
316 }
317 else {
318 addr = (db_expr_t) db_dot;
319 have_addr = FALSE;
320 }
321 t = db_read_token();
322 if (t == tCOMMA) {
323 if (!db_expression(&count)) {
324 db_printf("Count missing\n");
325 db_flush_lex();
326 return;
327 }
328 }
329 else {
330 db_unread_token(t);
331 count = -1;
332 }
333 if ((cmd->flag & CS_MORE) == 0) {
334 db_skip_to_eol();
335 }
336 }
337 }
338 *last_cmdp = cmd;
339 if (cmd != 0) {
340 /*
341 * Execute the command.
342 */
343 (*cmd->fcn)(addr, have_addr, count, modif);
344
345 if (cmd->flag & CS_SET_DOT) {
346 /*
347 * If command changes dot, set dot to
348 * previous address displayed (if 'ed' style).
349 */
350 if (db_ed_style) {
351 db_dot = db_prev;
352 }
353 else {
354 db_dot = db_next;
355 }
356 }
357 else {
358 /*
359 * If command does not change dot,
360 * set 'next' location to be the same.
361 */
362 db_next = db_dot;
363 }
364 }
365 }
366
367 /*
368 * 'show' commands
369 */
370
371 static struct command db_show_all_cmds[] = {
372 #if 0
373 { "threads", db_show_all_threads, 0, 0 },
374 #endif
375 { "procs", db_ps, 0, 0 },
376 { NULL }
377 };
378
379 static struct command db_show_cmds[] = {
380 { "all", 0, 0, db_show_all_cmds },
381 { "registers", db_show_regs, 0, 0 },
382 { "breaks", db_listbreak_cmd, 0, 0 },
383 #if 0
384 { "thread", db_show_one_thread, 0, 0 },
385 #endif
386 #if 0
387 { "port", ipc_port_print, 0, 0 },
388 #endif
389 { NULL, }
390 };
391
392 static struct command db_command_table[] = {
393 { "print", db_print_cmd, 0, 0 },
394 { "p", db_print_cmd, 0, 0 },
395 { "examine", db_examine_cmd, CS_SET_DOT, 0 },
396 { "x", db_examine_cmd, CS_SET_DOT, 0 },
397 { "search", db_search_cmd, CS_OWN|CS_SET_DOT, 0 },
398 { "set", db_set_cmd, CS_OWN, 0 },
399 { "write", db_write_cmd, CS_MORE|CS_SET_DOT, 0 },
400 { "w", db_write_cmd, CS_MORE|CS_SET_DOT, 0 },
401 { "delete", db_delete_cmd, 0, 0 },
402 { "d", db_delete_cmd, 0, 0 },
403 { "break", db_breakpoint_cmd, 0, 0 },
404 { "dwatch", db_deletewatch_cmd, 0, 0 },
405 { "watch", db_watchpoint_cmd, CS_MORE,0 },
406 { "dhwatch", db_deletehwatch_cmd, 0, 0 },
407 { "hwatch", db_hwatchpoint_cmd, 0, 0 },
408 { "step", db_single_step_cmd, 0, 0 },
409 { "s", db_single_step_cmd, 0, 0 },
410 { "continue", db_continue_cmd, 0, 0 },
411 { "c", db_continue_cmd, 0, 0 },
412 { "until", db_trace_until_call_cmd,0, 0 },
413 { "next", db_trace_until_matching_cmd,0, 0 },
414 { "match", db_trace_until_matching_cmd,0, 0 },
415 { "trace", db_stack_trace_cmd, 0, 0 },
416 { "where", db_stack_trace_cmd, 0, 0 },
417 { "call", db_fncall, CS_OWN, 0 },
418 { "show", 0, 0, db_show_cmds },
419 { "ps", db_ps, 0, 0 },
420 { "gdb", db_gdb, 0, 0 },
421 { "reset", db_reset, 0, 0 },
422 { NULL, }
423 };
424
425 static struct command *db_last_command = 0;
426
427 #if 0
428 void
429 db_help_cmd(void)
430 {
431 struct command *cmd = db_command_table;
432
433 while (cmd->name != 0) {
434 db_printf("%-12s", cmd->name);
435 db_end_line();
436 cmd++;
437 }
438 }
439 #endif
440
441 /*
442 * At least one non-optional command must be implemented using
443 * DB_COMMAND() so that db_cmd_set gets created. Here is one.
444 */
445 DB_COMMAND(panic, db_panic)
446 {
447 panic("from debugger");
448 }
449
450 void
451 db_command_loop(void)
452 {
453 /*
454 * Initialize 'prev' and 'next' to dot.
455 */
456 db_prev = db_dot;
457 db_next = db_dot;
458
459 db_cmd_loop_done = 0;
460 while (!db_cmd_loop_done) {
461
462 setjmp(db_jmpbuf);
463 if (db_print_position() != 0)
464 db_printf("\n");
465
466 db_printf("db> ");
467 db_read_line();
468
469 db_command(&db_last_command, db_command_table,
470 SET_BEGIN(db_cmd_set), SET_LIMIT(db_cmd_set));
471 }
472 }
473
474 void
475 db_error(char *s)
476 {
477 if (s)
478 db_printf("%s", s);
479 db_flush_lex();
480 longjmp(db_jmpbuf, 1);
481 }
482
483
484 /*
485 * Call random function:
486 * !expr(arg,arg,arg)
487 */
488 static void
489 db_fncall(db_expr_t dummy1, boolean_t dummy2, db_expr_t dummy3, char *dummy4)
490 {
491 db_expr_t fn_addr;
492 #define MAXARGS 11 /* XXX only 10 are passed */
493 db_expr_t args[MAXARGS];
494 int nargs = 0;
495 db_expr_t retval;
496 typedef db_expr_t fcn_10args_t (db_expr_t, db_expr_t, db_expr_t,
497 db_expr_t, db_expr_t, db_expr_t,
498 db_expr_t, db_expr_t, db_expr_t,
499 db_expr_t);
500 fcn_10args_t *func;
501 int t;
502
503 if (!db_expression(&fn_addr)) {
504 db_printf("Bad function\n");
505 db_flush_lex();
506 return;
507 }
508 func = (fcn_10args_t *)fn_addr; /* XXX */
509
510 t = db_read_token();
511 if (t == tLPAREN) {
512 if (db_expression(&args[0])) {
513 nargs++;
514 while ((t = db_read_token()) == tCOMMA) {
515 if (nargs == MAXARGS) {
516 db_printf("Too many arguments\n");
517 db_flush_lex();
518 return;
519 }
520 if (!db_expression(&args[nargs])) {
521 db_printf("Argument missing\n");
522 db_flush_lex();
523 return;
524 }
525 nargs++;
526 }
527 db_unread_token(t);
528 }
529 if (db_read_token() != tRPAREN) {
530 db_printf("?\n");
531 db_flush_lex();
532 return;
533 }
534 }
535 db_skip_to_eol();
536
537 while (nargs < MAXARGS) {
538 args[nargs++] = 0;
539 }
540
541 retval = (*func)(args[0], args[1], args[2], args[3], args[4],
542 args[5], args[6], args[7], args[8], args[9] );
543 db_printf("%#lr\n", (long)retval);
544 }
545
546 /* Enter GDB remote protocol debugger on the next trap. */
547
548 static void
549 db_gdb(db_expr_t dummy1, boolean_t dummy2, db_expr_t dummy3, char *dummy4)
550 {
551 if (gdb_tab == NULL) {
552 db_printf("No gdb port enabled. Set flag 0x80 on desired port\n");
553 db_printf("in your configuration file (currently sio only).\n");
554 return;
555 }
556 boothowto ^= RB_GDB;
557
558 db_printf("Next trap will enter %s\n",
559 boothowto & RB_GDB ? "GDB remote protocol mode"
560 : "DDB debugger");
561 }
562
563 static void
564 db_reset(db_expr_t dummy1, boolean_t dummy2, db_expr_t dummy3, char * dummy4)
565 {
566 cpu_reset();
567 }
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