2 * Mach Operating System
3 * Copyright (c) 1991,1990 Carnegie Mellon University
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.
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.
16 * Carnegie Mellon requests users of this software to return to
18 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
19 * School of Computer Science
20 * Carnegie Mellon University
21 * Pittsburgh PA 15213-3890
23 * any improvements or extensions that they make and grant Carnegie the
24 * rights to redistribute these changes.
30 * Author: David B. Golub, Carnegie Mellon University
37 #include <sys/param.h>
38 #include <sys/linker_set.h>
39 #include <sys/reboot.h>
40 #include <sys/systm.h>
44 #include <ddb/db_command.h>
45 #include <ddb/db_lex.h>
46 #include <ddb/db_output.h>
48 #include <machine/setjmp.h>
51 * Exported global variables
53 boolean_t db_cmd_loop_done;
56 db_addr_t db_last_addr;
60 SET_DECLARE(db_cmd_set, struct command);
61 SET_DECLARE(db_show_cmd_set, struct command);
63 static db_cmdfcn_t db_fncall;
64 static db_cmdfcn_t db_gdb;
66 /* XXX this is actually forward-static. */
67 extern struct command db_show_cmds[];
70 * if 'ed' style: 'dot' is set at start of last item printed,
71 * and '+' points to next line.
72 * Otherwise: 'dot' points to next item, '..' points to last.
74 static boolean_t db_ed_style = TRUE;
77 * Utility routine - discard tokens through end-of-line.
89 * Results of command search.
94 #define CMD_AMBIGUOUS 3
97 static void db_cmd_list __P((struct command *table,
98 struct command **aux_tablep,
99 struct command **aux_tablep_end));
100 static int db_cmd_search __P((char *name, struct command *table,
101 struct command **aux_tablep,
102 struct command **aux_tablep_end,
103 struct command **cmdp));
104 static void db_command __P((struct command **last_cmdp,
105 struct command *cmd_table,
106 struct command **aux_cmd_tablep,
107 struct command **aux_cmd_tablep_end));
110 * Search for command prefix.
113 db_cmd_search(name, table, aux_tablep, aux_tablep_end, cmdp)
115 struct command *table;
116 struct command **aux_tablep;
117 struct command **aux_tablep_end;
118 struct command **cmdp; /* out */
121 struct command **aux_cmdp;
122 int result = CMD_NONE;
124 for (cmd = table; cmd->name != 0; cmd++) {
131 while ((c = *lp) == *rp) {
141 /* end of name, not end of command -
143 if (result == CMD_FOUND) {
144 result = CMD_AMBIGUOUS;
145 /* but keep looking for a full match -
146 this lets us match single letters */
154 if (result == CMD_NONE && aux_tablep != 0)
155 /* XXX repeat too much code. */
156 for (aux_cmdp = aux_tablep; aux_cmdp < aux_tablep_end; aux_cmdp++) {
162 rp = (*aux_cmdp)->name;
163 while ((c = *lp) == *rp) {
173 /* end of name, not end of command -
175 if (result == CMD_FOUND) {
176 result = CMD_AMBIGUOUS;
177 /* but keep looking for a full match -
178 this lets us match single letters */
186 if (result == CMD_NONE) {
187 /* check for 'help' */
188 if (name[0] == 'h' && name[1] == 'e'
189 && name[2] == 'l' && name[3] == 'p')
196 db_cmd_list(table, aux_tablep, aux_tablep_end)
197 struct command *table;
198 struct command **aux_tablep;
199 struct command **aux_tablep_end;
201 register struct command *cmd;
202 register struct command **aux_cmdp;
204 for (cmd = table; cmd->name != 0; cmd++) {
205 db_printf("%-12s", cmd->name);
210 for (aux_cmdp = aux_tablep; aux_cmdp < aux_tablep_end; aux_cmdp++) {
211 db_printf("%-12s", (*aux_cmdp)->name);
217 db_command(last_cmdp, cmd_table, aux_cmd_tablep, aux_cmd_tablep_end)
218 struct command **last_cmdp; /* IN_OUT */
219 struct command *cmd_table;
220 struct command **aux_cmd_tablep;
221 struct command **aux_cmd_tablep_end;
225 char modif[TOK_STRING_SIZE];
226 db_expr_t addr, count;
227 boolean_t have_addr = FALSE;
232 /* empty line repeats last command, at 'next' */
234 addr = (db_expr_t)db_next;
239 else if (t == tEXCL) {
240 db_fncall((db_expr_t)0, (boolean_t)0, (db_expr_t)0, (char *)0);
243 else if (t != tIDENT) {
253 result = db_cmd_search(db_tok_string,
260 db_printf("No such command\n");
264 db_printf("Ambiguous\n");
268 db_cmd_list(cmd_table, aux_cmd_tablep, aux_cmd_tablep_end);
274 if ((cmd_table = cmd->more) != 0) {
275 /* XXX usually no more aux's. */
277 if (cmd_table == db_show_cmds)
278 aux_cmd_tablep = SET_BEGIN(db_show_cmd_set);
279 aux_cmd_tablep_end = SET_LIMIT(db_show_cmd_set);
283 db_cmd_list(cmd_table, aux_cmd_tablep, aux_cmd_tablep_end);
290 if ((cmd->flag & CS_OWN) == 0) {
293 * command [/modifier] [addr] [,count]
299 db_printf("Bad modifier\n");
303 db_strcpy(modif, db_tok_string);
310 if (db_expression(&addr)) {
311 db_dot = (db_addr_t) addr;
312 db_last_addr = db_dot;
316 addr = (db_expr_t) db_dot;
321 if (!db_expression(&count)) {
322 db_printf("Count missing\n");
331 if ((cmd->flag & CS_MORE) == 0) {
339 * Execute the command.
341 (*cmd->fcn)(addr, have_addr, count, modif);
343 if (cmd->flag & CS_SET_DOT) {
345 * If command changes dot, set dot to
346 * previous address displayed (if 'ed' style).
357 * If command does not change dot,
358 * set 'next' location to be the same.
369 static struct command db_show_all_cmds[] = {
371 { "threads", db_show_all_threads, 0, 0 },
373 { "procs", db_ps, 0, 0 },
377 static struct command db_show_cmds[] = {
378 { "all", 0, 0, db_show_all_cmds },
379 { "registers", db_show_regs, 0, 0 },
380 { "breaks", db_listbreak_cmd, 0, 0 },
382 { "thread", db_show_one_thread, 0, 0 },
385 { "port", ipc_port_print, 0, 0 },
390 static struct command db_command_table[] = {
391 { "print", db_print_cmd, 0, 0 },
392 { "p", db_print_cmd, 0, 0 },
393 { "examine", db_examine_cmd, CS_SET_DOT, 0 },
394 { "x", db_examine_cmd, CS_SET_DOT, 0 },
395 { "search", db_search_cmd, CS_OWN|CS_SET_DOT, 0 },
396 { "set", db_set_cmd, CS_OWN, 0 },
397 { "write", db_write_cmd, CS_MORE|CS_SET_DOT, 0 },
398 { "w", db_write_cmd, CS_MORE|CS_SET_DOT, 0 },
399 { "delete", db_delete_cmd, 0, 0 },
400 { "d", db_delete_cmd, 0, 0 },
401 { "break", db_breakpoint_cmd, 0, 0 },
402 { "dwatch", db_deletewatch_cmd, 0, 0 },
403 { "watch", db_watchpoint_cmd, CS_MORE,0 },
404 { "dhwatch", db_deletehwatch_cmd, 0, 0 },
405 { "hwatch", db_hwatchpoint_cmd, 0, 0 },
406 { "step", db_single_step_cmd, 0, 0 },
407 { "s", db_single_step_cmd, 0, 0 },
408 { "continue", db_continue_cmd, 0, 0 },
409 { "c", db_continue_cmd, 0, 0 },
410 { "until", db_trace_until_call_cmd,0, 0 },
411 { "next", db_trace_until_matching_cmd,0, 0 },
412 { "match", db_trace_until_matching_cmd,0, 0 },
413 { "trace", db_stack_trace_cmd, 0, 0 },
414 { "call", db_fncall, CS_OWN, 0 },
415 { "show", 0, 0, db_show_cmds },
416 { "ps", db_ps, 0, 0 },
417 { "gdb", db_gdb, 0, 0 },
421 static struct command *db_last_command = 0;
427 struct command *cmd = db_command_table;
429 while (cmd->name != 0) {
430 db_printf("%-12s", cmd->name);
438 * At least one non-optional command must be implemented using
439 * DB_COMMAND() so that db_cmd_set gets created. Here is one.
441 DB_COMMAND(panic, db_panic)
443 panic("from debugger");
450 * Initialize 'prev' and 'next' to dot.
455 db_cmd_loop_done = 0;
456 while (!db_cmd_loop_done) {
458 (void) setjmp(db_jmpbuf);
459 if (db_print_position() != 0)
463 (void) db_read_line();
465 db_command(&db_last_command, db_command_table,
466 SET_BEGIN(db_cmd_set), SET_LIMIT(db_cmd_set));
477 longjmp(db_jmpbuf, 1);
482 * Call random function:
486 db_fncall(dummy1, dummy2, dummy3, dummy4)
493 #define MAXARGS 11 /* XXX only 10 are passed */
494 db_expr_t args[MAXARGS];
497 typedef db_expr_t fcn_10args_t __P((db_expr_t, db_expr_t, db_expr_t,
498 db_expr_t, db_expr_t, db_expr_t,
499 db_expr_t, db_expr_t, db_expr_t,
504 if (!db_expression(&fn_addr)) {
505 db_printf("Bad function\n");
509 func = (fcn_10args_t *)fn_addr; /* XXX */
513 if (db_expression(&args[0])) {
515 while ((t = db_read_token()) == tCOMMA) {
516 if (nargs == MAXARGS) {
517 db_printf("Too many arguments\n");
521 if (!db_expression(&args[nargs])) {
522 db_printf("Argument missing\n");
530 if (db_read_token() != tRPAREN) {
538 while (nargs < MAXARGS) {
542 retval = (*func)(args[0], args[1], args[2], args[3], args[4],
543 args[5], args[6], args[7], args[8], args[9] );
544 db_printf("%#lr\n", (long)retval);
547 /* Enter GDB remote protocol debugger on the next trap. */
549 dev_t gdbdev = NODEV;
554 db_gdb (dummy1, dummy2, dummy3, dummy4)
561 if (gdbdev == NODEV) {
562 db_printf("No gdb port enabled. Set flag 0x80 on desired port\n");
563 db_printf("in your configuration file (currently sio only).\n");
568 db_printf("Next trap will enter %s\n",
569 boothowto & RB_GDB ? "GDB remote protocol mode"