[dragonfly.git] / sys / ddb / db_command.c

/*
 * Mach Operating System
 * Copyright (c) 1991,1990 Carnegie Mellon University
 * All Rights Reserved.
 *
 * Permission to use, copy, modify and distribute this software and its
 * documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 *
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 *
 * Carnegie Mellon requests users of this software to return to
 *
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 *
 * any improvements or extensions that they make and grant Carnegie the
 * rights to redistribute these changes.
 *
 * $FreeBSD: src/sys/ddb/db_command.c,v 1.34.2.2 2001/07/29 22:48:36 kris Exp $
 */

/*
 *	Author: David B. Golub, Carnegie Mellon University
 *	Date:	7/90
 */

/*
 * Command dispatcher.
 */
#include <sys/param.h>
#include <sys/linker_set.h>
#include <sys/reboot.h>
#include <sys/systm.h>
#include <sys/cons.h>

#include <ddb/ddb.h>
#include <ddb/db_command.h>
#include <ddb/db_lex.h>
#include <ddb/db_output.h>

#include <machine/md_var.h>	/* needed for db_reset() */

#include <setjmp.h>

/*
 * Exported global variables
 */
boolean_t	db_cmd_loop_done;
db_addr_t	db_dot;
jmp_buf		db_jmpbuf;
db_addr_t	db_last_addr;
db_addr_t	db_prev;
db_addr_t	db_next;

SET_DECLARE(db_cmd_set, struct command);
SET_DECLARE(db_show_cmd_set, struct command);

static db_cmdfcn_t	db_fncall;
static db_cmdfcn_t	db_gdb;
static db_cmdfcn_t	db_reset;

/*
 * 'show' commands
 */

static struct command db_show_all_cmds[] = {
#if 0
	{ "threads",	db_show_all_threads,	0,	0 },
#endif
	{ "procs",	db_ps,			0,	0 },
	{ NULL }
};

static struct command db_show_cmds[] = {
	{ "all",	0,			0,	db_show_all_cmds },
	{ "registers",	db_show_regs,		0,	0 },
	{ "breaks",	db_listbreak_cmd, 	0,	0 },
#if 0
	{ "thread",	db_show_one_thread,	0,	0 },
#endif
#if 0
	{ "port",	ipc_port_print,		0,	0 },
#endif
	{ NULL, }
};

static struct command db_command_table[] = {
	{ "print",	db_print_cmd,		0,	0 },
	{ "p",		db_print_cmd,		0,	0 },
	{ "examine",	db_examine_cmd,		CS_SET_DOT, 0 },
	{ "x",		db_examine_cmd,		CS_SET_DOT, 0 },
	{ "search",	db_search_cmd,		CS_OWN|CS_SET_DOT, 0 },
	{ "set",	db_set_cmd,		CS_OWN,	0 },
	{ "write",	db_write_cmd,		CS_MORE|CS_SET_DOT, 0 },
	{ "w",		db_write_cmd,		CS_MORE|CS_SET_DOT, 0 },
	{ "delete",	db_delete_cmd,		0,	0 },
	{ "d",		db_delete_cmd,		0,	0 },
	{ "break",	db_breakpoint_cmd,	0,	0 },
	{ "dwatch",	db_deletewatch_cmd,	0,	0 },
	{ "watch",	db_watchpoint_cmd,	CS_MORE,0 },
	{ "dhwatch",	db_deletehwatch_cmd,	0,      0 },
	{ "hwatch",	db_hwatchpoint_cmd,	0,      0 },
	{ "step",	db_single_step_cmd,	0,	0 },
	{ "s",		db_single_step_cmd,	0,	0 },
	{ "continue",	db_continue_cmd,	0,	0 },
	{ "c",		db_continue_cmd,	0,	0 },
	{ "until",	db_trace_until_call_cmd,0,	0 },
	{ "next",	db_trace_until_matching_cmd,0,	0 },
	{ "match",	db_trace_until_matching_cmd,0,	0 },
	{ "trace",	db_stack_trace_cmd,	0,	0 },
	{ "where",	db_stack_trace_cmd, 0,	0 },
	{ "call",	db_fncall,		CS_OWN,	0 },
	{ "show",	0,			0,	db_show_cmds },
	{ "ps",		db_ps,			0,	0 },
	{ "gdb",	db_gdb,			0,	0 },
	{ "reset",	db_reset,		0,	0 },
	{ NULL, }
};

static struct command	*db_last_command = 0;

/*
 * if 'ed' style: 'dot' is set at start of last item printed,
 * and '+' points to next line.
 * Otherwise: 'dot' points to next item, '..' points to last.
 */
static boolean_t	db_ed_style = TRUE;

/*
 * Utility routine - discard tokens through end-of-line.
 */
void
db_skip_to_eol(void)
{
	int	t;
	do {
	    t = db_read_token();
	} while (t != tEOL);
}

/*
 * Results of command search.
 */
#define	CMD_UNIQUE	0
#define	CMD_FOUND	1
#define	CMD_NONE	2
#define	CMD_AMBIGUOUS	3
#define	CMD_HELP	4

static void	db_cmd_list (struct command *table,
				 struct command **aux_tablep,
				 struct command **aux_tablep_end);
static int	db_cmd_search (char *name, struct command *table,
				   struct command **aux_tablep,
				   struct command **aux_tablep_end,
				   struct command **cmdp);
static void	db_command (struct command **last_cmdp,
				struct command *cmd_table,
				struct command **aux_cmd_tablep,
				struct command **aux_cmd_tablep_end);

/*
 * Search for command prefix.
 *
 * Parameters:
 *     cmdp:	out
 */
static int
db_cmd_search(char *name, struct command *table, struct command **aux_tablep,
	      struct command **aux_tablep_end, struct command **cmdp)
{
	struct command	*cmd;
	struct command	**aux_cmdp;
	int		result = CMD_NONE;

	for (cmd = table; cmd->name != 0; cmd++) {
	    char *lp;
	    char *rp;
	    int  c;

	    lp = name;
	    rp = cmd->name;
	    while ((c = *lp) == *rp) {
		if (c == 0) {
		    /* complete match */
		    *cmdp = cmd;
		    return (CMD_UNIQUE);
		}
		lp++;
		rp++;
	    }
	    if (c == 0) {
		/* end of name, not end of command -
		   partial match */
		if (result == CMD_FOUND) {
		    result = CMD_AMBIGUOUS;
		    /* but keep looking for a full match -
		       this lets us match single letters */
		}
		else {
		    *cmdp = cmd;
		    result = CMD_FOUND;
		}
	    }
	}
	if (result == CMD_NONE && aux_tablep != 0)
	    /* XXX repeat too much code. */
	    for (aux_cmdp = aux_tablep; aux_cmdp < aux_tablep_end; aux_cmdp++) {
		char *lp;
		char *rp;
		int  c;

		lp = name;
		rp = (*aux_cmdp)->name;
		while ((c = *lp) == *rp) {
		    if (c == 0) {
			/* complete match */
			*cmdp = *aux_cmdp;
			return (CMD_UNIQUE);
		    }
		    lp++;
		    rp++;
		}
		if (c == 0) {
		    /* end of name, not end of command -
		       partial match */
		    if (result == CMD_FOUND) {
			result = CMD_AMBIGUOUS;
			/* but keep looking for a full match -
			   this lets us match single letters */
		    }
		    else {
			*cmdp = *aux_cmdp;
			result = CMD_FOUND;
		    }
		}
	    }
	if (result == CMD_NONE) {
	    /* check for 'help' */
		if (name[0] == 'h' && name[1] == 'e'
		    && name[2] == 'l' && name[3] == 'p')
			result = CMD_HELP;
	}
	return (result);
}

static void
db_cmd_list(struct command *table, struct command **aux_tablep,
	    struct command **aux_tablep_end)
{
	struct command *cmd;
	struct command **aux_cmdp;

	for (cmd = table; cmd->name != 0; cmd++) {
	    db_printf("%-12s", cmd->name);
	    db_end_line();
	}
	if (aux_tablep == 0)
	    return;
	for (aux_cmdp = aux_tablep; aux_cmdp < aux_tablep_end; aux_cmdp++) {
	    db_printf("%-12s", (*aux_cmdp)->name);
	    db_end_line();
	}
}

/*
 * Parameters:
 *     last_cmdp:	IN_OUT
 */
static void
db_command(struct command **last_cmdp, struct command *cmd_table,
	   struct command **aux_cmd_tablep, struct command **aux_cmd_tablep_end)
{
	struct command	*cmd;
	int		t;
	char		modif[TOK_STRING_SIZE];
	db_expr_t	addr, count;
	boolean_t	have_addr = FALSE;
	int		result;

	cmd = NULL;
	t = db_read_token();
	if (t == tEOL) {
	    /* empty line repeats last command, at 'next' */
	    cmd = *last_cmdp;
	    addr = (db_expr_t)db_next;
	    have_addr = FALSE;
	    count = 1;
	    modif[0] = '\0';
	}
	else if (t == tEXCL) {
	    db_fncall((db_expr_t)0, (boolean_t)0, (db_expr_t)0, NULL);
	    return;
	}
	else if (t != tIDENT) {
	    db_printf("?\n");
	    db_flush_lex();
	    return;
	}
	else {
	    /*
	     * Search for command
	     */
	    while (cmd_table) {
		result = db_cmd_search(db_tok_string,
				       cmd_table,
				       aux_cmd_tablep,
				       aux_cmd_tablep_end,
				       &cmd);
		switch (result) {
		    case CMD_NONE:
			db_printf("No such command\n");
			db_flush_lex();
			return;
		    case CMD_AMBIGUOUS:
			db_printf("Ambiguous\n");
			db_flush_lex();
			return;
		    case CMD_HELP:
			db_cmd_list(cmd_table, aux_cmd_tablep, aux_cmd_tablep_end);
			db_flush_lex();
			return;
		    default:
			break;
		}
		if ((cmd_table = cmd->more) != 0) {
		    /* XXX usually no more aux's. */
		    aux_cmd_tablep = 0;
		    if (cmd_table == db_show_cmds) {
			aux_cmd_tablep = SET_BEGIN(db_show_cmd_set);
			aux_cmd_tablep_end = SET_LIMIT(db_show_cmd_set);
		    }

		    t = db_read_token();
		    if (t != tIDENT) {
			db_cmd_list(cmd_table, aux_cmd_tablep, aux_cmd_tablep_end);
			db_flush_lex();
			return;
		    }
		}
	    }

	    if ((cmd->flag & CS_OWN) == 0) {
		/*
		 * Standard syntax:
		 * command [/modifier] [addr] [,count]
		 */
		t = db_read_token();
		if (t == tSLASH) {
		    t = db_read_token();
		    if (t != tIDENT && t != tNUMBER) {
			db_printf("Bad modifier\n");
			db_flush_lex();
			return;
		    }
		    db_strcpy(modif, db_tok_string);
		}
		else {
		    db_unread_token(t);
		    modif[0] = '\0';
		}

		if (db_expression(&addr)) {
		    db_dot = (db_addr_t) addr;
		    db_last_addr = db_dot;
		    have_addr = TRUE;
		}
		else {
		    addr = (db_expr_t) db_dot;
		    have_addr = FALSE;
		}
		t = db_read_token();
		if (t == tCOMMA) {
		    if (!db_expression(&count)) {
			db_printf("Count missing\n");
			db_flush_lex();
			return;
		    }
		}
		else {
		    db_unread_token(t);
		    count = -1;
		}
		if ((cmd->flag & CS_MORE) == 0) {
		    db_skip_to_eol();
		}
	    }
	}
	*last_cmdp = cmd;
	if (cmd != 0) {
	    /*
	     * Execute the command.
	     */
	    (*cmd->fcn)(addr, have_addr, count, modif);

	    if (cmd->flag & CS_SET_DOT) {
		/*
		 * If command changes dot, set dot to
		 * previous address displayed (if 'ed' style).
		 */
		if (db_ed_style) {
		    db_dot = db_prev;
		}
		else {
		    db_dot = db_next;
		}
	    }
	    else {
		/*
		 * If command does not change dot,
		 * set 'next' location to be the same.
		 */
		db_next = db_dot;
	    }
	}
}

#if 0
void
db_help_cmd(void)
{
	struct command *cmd = db_command_table;

	while (cmd->name != 0) {
	    db_printf("%-12s", cmd->name);
	    db_end_line();
	    cmd++;
	}
}
#endif

/*
 * At least one non-optional command must be implemented using
 * DB_COMMAND() so that db_cmd_set gets created.  Here is one.
 */
DB_COMMAND(panic, db_panic)
{
	panic("from debugger");
}

void
db_command_loop(void)
{
	/*
	 * Initialize 'prev' and 'next' to dot.
	 */
	db_prev = db_dot;
	db_next = db_dot;

	db_cmd_loop_done = 0;
	while (!db_cmd_loop_done) {

	    setjmp(db_jmpbuf);
	    if (db_print_position() != 0)
		db_printf("\n");

	    db_printf("db> ");
	    db_read_line();

	    db_command(&db_last_command, db_command_table,
		    SET_BEGIN(db_cmd_set), SET_LIMIT(db_cmd_set));
	}
}

void
db_error(char *s)
{
	if (s)
	    db_printf("%s", s);
	db_flush_lex();
	longjmp(db_jmpbuf, 1);
}


/*
 * Call random function:
 * !expr(arg,arg,arg)
 */
static void
db_fncall(db_expr_t dummy1, boolean_t dummy2, db_expr_t dummy3, char *dummy4)
{
	db_expr_t	fn_addr;
#define	MAXARGS		11	/* XXX only 10 are passed */
	db_expr_t	args[MAXARGS];
	int		nargs = 0;
	db_expr_t	retval;
	typedef db_expr_t fcn_10args_t (db_expr_t, db_expr_t, db_expr_t,
					    db_expr_t, db_expr_t, db_expr_t,
					    db_expr_t, db_expr_t, db_expr_t,
					    db_expr_t);
	fcn_10args_t	*func;
	int		t;

	if (!db_expression(&fn_addr)) {
	    db_printf("Bad function\n");
	    db_flush_lex();
	    return;
	}
	func = (fcn_10args_t *)fn_addr;	/* XXX */

	t = db_read_token();
	if (t == tLPAREN) {
	    if (db_expression(&args[0])) {
		nargs++;
		while ((t = db_read_token()) == tCOMMA) {
		    if (nargs == MAXARGS) {
			db_printf("Too many arguments\n");
			db_flush_lex();
			return;
		    }
		    if (!db_expression(&args[nargs])) {
			db_printf("Argument missing\n");
			db_flush_lex();
			return;
		    }
		    nargs++;
		}
		db_unread_token(t);
	    }
	    if (db_read_token() != tRPAREN) {
		db_printf("?\n");
		db_flush_lex();
		return;
	    }
	}
	db_skip_to_eol();

	while (nargs < MAXARGS) {
	    args[nargs++] = 0;
	}

	retval = (*func)(args[0], args[1], args[2], args[3], args[4],
			 args[5], args[6], args[7], args[8], args[9] );
	db_printf("%#lr\n", (long)retval);
}

/* Enter GDB remote protocol debugger on the next trap. */

static void
db_gdb(db_expr_t dummy1, boolean_t dummy2, db_expr_t dummy3, char *dummy4)
{
	if (gdb_tab == NULL) {
		db_printf("No gdb port enabled. Set flag 0x80 on desired port\n");
		db_printf("in your configuration file (currently sio only).\n");
		return;
	}
	boothowto ^= RB_GDB;

	db_printf("Next trap will enter %s\n",
		   boothowto & RB_GDB ? "GDB remote protocol mode"
				      : "DDB debugger");
}

static void
db_reset(db_expr_t dummy1, boolean_t dummy2, db_expr_t dummy3, char * dummy4)
{
	cpu_reset();
}
Commit	Line	Data
984263bc MD	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	*/
	28
	29	/*
	30	* Author: David B. Golub, Carnegie Mellon University
	31	* Date: 7/90
	32	*/
	33
	34	/*
	35	* Command dispatcher.
	36	*/
	37	#include <sys/param.h>
	38	#include <sys/linker_set.h>
	39	#include <sys/reboot.h>
	40	#include <sys/systm.h>
	41	#include <sys/cons.h>
	42
	43	#include <ddb/ddb.h>
	44	#include <ddb/db_command.h>
	45	#include <ddb/db_lex.h>
	46	#include <ddb/db_output.h>
	47
6bd9bbba HP	48	#include <machine/md_var.h> /* needed for db_reset() */
6bd9bbba HP	49
984263bc MD	50	#include <setjmp.h>
	51
	52	/*
	53	* Exported global variables
	54	*/
	55	boolean_t db_cmd_loop_done;
984263bc MD	56	db_addr_t db_dot;
	57	jmp_buf db_jmpbuf;
	58	db_addr_t db_last_addr;
	59	db_addr_t db_prev;
	60	db_addr_t db_next;
dc62b251 MD	61
	62	SET_DECLARE(db_cmd_set, struct command);
	63	SET_DECLARE(db_show_cmd_set, struct command);
984263bc MD	64
	65	static db_cmdfcn_t db_fncall;
	66	static db_cmdfcn_t db_gdb;
6bd9bbba	67	static db_cmdfcn_t db_reset;
984263bc	68
35efc471 SW	69	/*
	70	* 'show' commands
	71	*/
	72
	73	static struct command db_show_all_cmds[] = {
	74	#if 0
	75	{ "threads", db_show_all_threads, 0, 0 },
	76	#endif
	77	{ "procs", db_ps, 0, 0 },
	78	{ NULL }
	79	};
	80
	81	static struct command db_show_cmds[] = {
	82	{ "all", 0, 0, db_show_all_cmds },
	83	{ "registers", db_show_regs, 0, 0 },
	84	{ "breaks", db_listbreak_cmd, 0, 0 },
	85	#if 0
	86	{ "thread", db_show_one_thread, 0, 0 },
	87	#endif
	88	#if 0
	89	{ "port", ipc_port_print, 0, 0 },
	90	#endif
	91	{ NULL, }
	92	};
	93
	94	static struct command db_command_table[] = {
	95	{ "print", db_print_cmd, 0, 0 },
	96	{ "p", db_print_cmd, 0, 0 },
	97	{ "examine", db_examine_cmd, CS_SET_DOT, 0 },
	98	{ "x", db_examine_cmd, CS_SET_DOT, 0 },
	99	{ "search", db_search_cmd, CS_OWN\|CS_SET_DOT, 0 },
	100	{ "set", db_set_cmd, CS_OWN, 0 },
	101	{ "write", db_write_cmd, CS_MORE\|CS_SET_DOT, 0 },
	102	{ "w", db_write_cmd, CS_MORE\|CS_SET_DOT, 0 },
	103	{ "delete", db_delete_cmd, 0, 0 },
	104	{ "d", db_delete_cmd, 0, 0 },
	105	{ "break", db_breakpoint_cmd, 0, 0 },
	106	{ "dwatch", db_deletewatch_cmd, 0, 0 },
	107	{ "watch", db_watchpoint_cmd, CS_MORE,0 },
	108	{ "dhwatch", db_deletehwatch_cmd, 0, 0 },
	109	{ "hwatch", db_hwatchpoint_cmd, 0, 0 },
	110	{ "step", db_single_step_cmd, 0, 0 },
	111	{ "s", db_single_step_cmd, 0, 0 },
	112	{ "continue", db_continue_cmd, 0, 0 },
	113	{ "c", db_continue_cmd, 0, 0 },
	114	{ "until", db_trace_until_call_cmd,0, 0 },
	115	{ "next", db_trace_until_matching_cmd,0, 0 },
	116	{ "match", db_trace_until_matching_cmd,0, 0 },
	117	{ "trace", db_stack_trace_cmd, 0, 0 },
	118	{ "where", db_stack_trace_cmd, 0, 0 },
	119	{ "call", db_fncall, CS_OWN, 0 },
	120	{ "show", 0, 0, db_show_cmds },
	121	{ "ps", db_ps, 0, 0 },
	122	{ "gdb", db_gdb, 0, 0 },
	123	{ "reset", db_reset, 0, 0 },
	124	{ NULL, }
	125	};
	126
	127	static struct command *db_last_command = 0;
984263bc MD	128
	129	/*
	130	* if 'ed' style: 'dot' is set at start of last item printed,
	131	* and '+' points to next line.
	132	* Otherwise: 'dot' points to next item, '..' points to last.
	133	*/
	134	static boolean_t db_ed_style = TRUE;
	135
	136	/*
	137	* Utility routine - discard tokens through end-of-line.
	138	*/
	139	void
2c9702b2	140	db_skip_to_eol(void)
984263bc MD	141	{
	142	int t;
	143	do {
	144	t = db_read_token();
	145	} while (t != tEOL);
	146	}
	147
	148	/*
	149	* Results of command search.
	150	*/
	151	#define CMD_UNIQUE 0
	152	#define CMD_FOUND 1
	153	#define CMD_NONE 2
	154	#define CMD_AMBIGUOUS 3
	155	#define CMD_HELP 4
	156
43c0ece6	157	static void db_cmd_list (struct command *table,
dc62b251 MD	158	struct command **aux_tablep,
dc62b251 MD	159	struct command **aux_tablep_end);
43c0ece6	160	static int db_cmd_search (char name, struct command table,
984263bc	161	struct command **aux_tablep,
dc62b251	162	struct command **aux_tablep_end,
43c0ece6 RG	163	struct command **cmdp);
43c0ece6 RG	164	static void db_command (struct command **last_cmdp,
984263bc	165	struct command *cmd_table,
dc62b251 MD	166	struct command **aux_cmd_tablep,
dc62b251 MD	167	struct command **aux_cmd_tablep_end);
984263bc MD	168
	169	/*
	170	* Search for command prefix.
2c9702b2 SW	171	*
	172	* Parameters:
	173	* cmdp: out
984263bc MD	174	*/
984263bc MD	175	static int
2c9702b2 SW	176	db_cmd_search(char name, struct command table, struct command **aux_tablep,
2c9702b2 SW	177	struct command aux_tablep_end, struct command cmdp)
984263bc MD	178	{
	179	struct command *cmd;
	180	struct command **aux_cmdp;
	181	int result = CMD_NONE;
	182
	183	for (cmd = table; cmd->name != 0; cmd++) {
ad0290bd RG	184	char *lp;
	185	char *rp;
	186	int c;
984263bc MD	187
	188	lp = name;
	189	rp = cmd->name;
	190	while ((c = lp) == rp) {
	191	if (c == 0) {
	192	/* complete match */
	193	*cmdp = cmd;
	194	return (CMD_UNIQUE);
	195	}
	196	lp++;
	197	rp++;
	198	}
	199	if (c == 0) {
	200	/* end of name, not end of command -
	201	partial match */
	202	if (result == CMD_FOUND) {
	203	result = CMD_AMBIGUOUS;
	204	/* but keep looking for a full match -
	205	this lets us match single letters */
	206	}
	207	else {
	208	*cmdp = cmd;
	209	result = CMD_FOUND;
	210	}
	211	}
	212	}
	213	if (result == CMD_NONE && aux_tablep != 0)
	214	/* XXX repeat too much code. */
dc62b251	215	for (aux_cmdp = aux_tablep; aux_cmdp < aux_tablep_end; aux_cmdp++) {
ad0290bd RG	216	char *lp;
	217	char *rp;
	218	int c;
984263bc MD	219
	220	lp = name;
	221	rp = (*aux_cmdp)->name;
	222	while ((c = lp) == rp) {
	223	if (c == 0) {
	224	/* complete match */
	225	cmdp = aux_cmdp;
	226	return (CMD_UNIQUE);
	227	}
	228	lp++;
	229	rp++;
	230	}
	231	if (c == 0) {
	232	/* end of name, not end of command -
	233	partial match */
	234	if (result == CMD_FOUND) {
	235	result = CMD_AMBIGUOUS;
	236	/* but keep looking for a full match -
	237	this lets us match single letters */
	238	}
	239	else {
	240	cmdp = aux_cmdp;
	241	result = CMD_FOUND;
	242	}
	243	}
	244	}
	245	if (result == CMD_NONE) {
	246	/* check for 'help' */
	247	if (name[0] == 'h' && name[1] == 'e'
	248	&& name[2] == 'l' && name[3] == 'p')
	249	result = CMD_HELP;
	250	}
	251	return (result);
	252	}
	253
	254	static void
2c9702b2 SW	255	db_cmd_list(struct command table, struct command *aux_tablep,
2c9702b2 SW	256	struct command **aux_tablep_end)
984263bc	257	{
ad0290bd RG	258	struct command *cmd;
ad0290bd RG	259	struct command **aux_cmdp;
984263bc MD	260
	261	for (cmd = table; cmd->name != 0; cmd++) {
	262	db_printf("%-12s", cmd->name);
	263	db_end_line();
	264	}
	265	if (aux_tablep == 0)
	266	return;
dc62b251	267	for (aux_cmdp = aux_tablep; aux_cmdp < aux_tablep_end; aux_cmdp++) {
984263bc MD	268	db_printf("%-12s", (*aux_cmdp)->name);
	269	db_end_line();
	270	}
	271	}
	272
2c9702b2 SW	273	/*
	274	* Parameters:
	275	* last_cmdp: IN_OUT
	276	*/
984263bc	277	static void
2c9702b2 SW	278	db_command(struct command *last_cmdp, struct command cmd_table,
2c9702b2 SW	279	struct command aux_cmd_tablep, struct command aux_cmd_tablep_end)
984263bc MD	280	{
	281	struct command *cmd;
	282	int t;
	283	char modif[TOK_STRING_SIZE];
	284	db_expr_t addr, count;
	285	boolean_t have_addr = FALSE;
	286	int result;
	287
d557216f	288	cmd = NULL;
984263bc MD	289	t = db_read_token();
	290	if (t == tEOL) {
	291	/* empty line repeats last command, at 'next' */
	292	cmd = *last_cmdp;
	293	addr = (db_expr_t)db_next;
	294	have_addr = FALSE;
	295	count = 1;
	296	modif[0] = '\0';
	297	}
	298	else if (t == tEXCL) {
60233e58	299	db_fncall((db_expr_t)0, (boolean_t)0, (db_expr_t)0, NULL);
984263bc MD	300	return;
	301	}
	302	else if (t != tIDENT) {
	303	db_printf("?\n");
	304	db_flush_lex();
	305	return;
	306	}
	307	else {
	308	/*
	309	* Search for command
	310	*/
	311	while (cmd_table) {
	312	result = db_cmd_search(db_tok_string,
	313	cmd_table,
	314	aux_cmd_tablep,
dc62b251	315	aux_cmd_tablep_end,
984263bc MD	316	&cmd);
	317	switch (result) {
	318	case CMD_NONE:
	319	db_printf("No such command\n");
	320	db_flush_lex();
	321	return;
	322	case CMD_AMBIGUOUS:
	323	db_printf("Ambiguous\n");
	324	db_flush_lex();
	325	return;
	326	case CMD_HELP:
dc62b251	327	db_cmd_list(cmd_table, aux_cmd_tablep, aux_cmd_tablep_end);
984263bc MD	328	db_flush_lex();
	329	return;
	330	default:
	331	break;
	332	}
	333	if ((cmd_table = cmd->more) != 0) {
	334	/* XXX usually no more aux's. */
	335	aux_cmd_tablep = 0;
dc62b251 MD	336	if (cmd_table == db_show_cmds) {
	337	aux_cmd_tablep = SET_BEGIN(db_show_cmd_set);
	338	aux_cmd_tablep_end = SET_LIMIT(db_show_cmd_set);
	339	}
984263bc MD	340
	341	t = db_read_token();
	342	if (t != tIDENT) {
dc62b251	343	db_cmd_list(cmd_table, aux_cmd_tablep, aux_cmd_tablep_end);
984263bc MD	344	db_flush_lex();
	345	return;
	346	}
	347	}
	348	}
	349
	350	if ((cmd->flag & CS_OWN) == 0) {
	351	/*
	352	* Standard syntax:
	353	* command [/modifier] [addr] [,count]
	354	*/
	355	t = db_read_token();
	356	if (t == tSLASH) {
	357	t = db_read_token();
337d8b07	358	if (t != tIDENT && t != tNUMBER) {
984263bc MD	359	db_printf("Bad modifier\n");
	360	db_flush_lex();
	361	return;
	362	}
	363	db_strcpy(modif, db_tok_string);
	364	}
	365	else {
	366	db_unread_token(t);
	367	modif[0] = '\0';
	368	}
	369
	370	if (db_expression(&addr)) {
	371	db_dot = (db_addr_t) addr;
	372	db_last_addr = db_dot;
	373	have_addr = TRUE;
	374	}
	375	else {
	376	addr = (db_expr_t) db_dot;
	377	have_addr = FALSE;
	378	}
	379	t = db_read_token();
	380	if (t == tCOMMA) {
	381	if (!db_expression(&count)) {
	382	db_printf("Count missing\n");
	383	db_flush_lex();
	384	return;
	385	}
	386	}
	387	else {
	388	db_unread_token(t);
	389	count = -1;
	390	}
	391	if ((cmd->flag & CS_MORE) == 0) {
	392	db_skip_to_eol();
	393	}
	394	}
	395	}
	396	*last_cmdp = cmd;
	397	if (cmd != 0) {
	398	/*
	399	* Execute the command.
	400	*/
	401	(*cmd->fcn)(addr, have_addr, count, modif);
	402
	403	if (cmd->flag & CS_SET_DOT) {
	404	/*
	405	* If command changes dot, set dot to
	406	* previous address displayed (if 'ed' style).
	407	*/
	408	if (db_ed_style) {
	409	db_dot = db_prev;
	410	}
	411	else {
	412	db_dot = db_next;
	413	}
	414	}
	415	else {
	416	/*
	417	* If command does not change dot,
	418	* set 'next' location to be the same.
	419	*/
	420	db_next = db_dot;
	421	}
	422	}
423	}
424
984263bc MD	425	#if 0
984263bc MD	426	void
2c9702b2	427	db_help_cmd(void)
984263bc MD	428	{
	429	struct command *cmd = db_command_table;
	430
	431	while (cmd->name != 0) {
	432	db_printf("%-12s", cmd->name);
	433	db_end_line();
	434	cmd++;
	435	}
	436	}
	437	#endif
	438
	439	/*
	440	* At least one non-optional command must be implemented using
	441	* DB_COMMAND() so that db_cmd_set gets created. Here is one.
	442	*/
	443	DB_COMMAND(panic, db_panic)
	444	{
	445	panic("from debugger");
	446	}
	447
	448	void
2c9702b2	449	db_command_loop(void)
984263bc MD	450	{
	451	/*
	452	* Initialize 'prev' and 'next' to dot.
	453	*/
	454	db_prev = db_dot;
	455	db_next = db_dot;
	456
	457	db_cmd_loop_done = 0;
	458	while (!db_cmd_loop_done) {
	459
2c9702b2	460	setjmp(db_jmpbuf);
984263bc MD	461	if (db_print_position() != 0)
	462	db_printf("\n");
	463
	464	db_printf("db> ");
2c9702b2	465	db_read_line();
984263bc MD	466
984263bc MD	467	db_command(&db_last_command, db_command_table,
dc62b251	468	SET_BEGIN(db_cmd_set), SET_LIMIT(db_cmd_set));
984263bc MD	469	}
	470	}
	471
	472	void
2c9702b2	473	db_error(char *s)
984263bc MD	474	{
	475	if (s)
	476	db_printf("%s", s);
	477	db_flush_lex();
	478	longjmp(db_jmpbuf, 1);
	479	}
	480
	481
	482	/*
	483	* Call random function:
	484	* !expr(arg,arg,arg)
	485	*/
	486	static void
2c9702b2	487	db_fncall(db_expr_t dummy1, boolean_t dummy2, db_expr_t dummy3, char *dummy4)
984263bc MD	488	{
	489	db_expr_t fn_addr;
	490	#define MAXARGS 11 /* XXX only 10 are passed */
	491	db_expr_t args[MAXARGS];
	492	int nargs = 0;
	493	db_expr_t retval;
43c0ece6	494	typedef db_expr_t fcn_10args_t (db_expr_t, db_expr_t, db_expr_t,
984263bc MD	495	db_expr_t, db_expr_t, db_expr_t,
984263bc MD	496	db_expr_t, db_expr_t, db_expr_t,
43c0ece6	497	db_expr_t);
984263bc MD	498	fcn_10args_t *func;
	499	int t;
	500
	501	if (!db_expression(&fn_addr)) {
	502	db_printf("Bad function\n");
	503	db_flush_lex();
	504	return;
	505	}
	506	func = (fcn_10args_t )fn_addr; / XXX */
	507
	508	t = db_read_token();
	509	if (t == tLPAREN) {
	510	if (db_expression(&args[0])) {
	511	nargs++;
	512	while ((t = db_read_token()) == tCOMMA) {
	513	if (nargs == MAXARGS) {
	514	db_printf("Too many arguments\n");
	515	db_flush_lex();
	516	return;
	517	}
	518	if (!db_expression(&args[nargs])) {
	519	db_printf("Argument missing\n");
	520	db_flush_lex();
	521	return;
	522	}
	523	nargs++;
	524	}
	525	db_unread_token(t);
	526	}
	527	if (db_read_token() != tRPAREN) {
	528	db_printf("?\n");
	529	db_flush_lex();
	530	return;
	531	}
	532	}
	533	db_skip_to_eol();
	534
	535	while (nargs < MAXARGS) {
	536	args[nargs++] = 0;
	537	}
	538
	539	retval = (*func)(args[0], args[1], args[2], args[3], args[4],
	540	args[5], args[6], args[7], args[8], args[9] );
	541	db_printf("%#lr\n", (long)retval);
	542	}
	543
	544	/* Enter GDB remote protocol debugger on the next trap. */
	545
984263bc	546	static void
2c9702b2	547	db_gdb(db_expr_t dummy1, boolean_t dummy2, db_expr_t dummy3, char *dummy4)
984263bc	548	{
ce81f184	549	if (gdb_tab == NULL) {
984263bc MD	550	db_printf("No gdb port enabled. Set flag 0x80 on desired port\n");
	551	db_printf("in your configuration file (currently sio only).\n");
	552	return;
	553	}
	554	boothowto ^= RB_GDB;
	555
	556	db_printf("Next trap will enter %s\n",
	557	boothowto & RB_GDB ? "GDB remote protocol mode"
	558	: "DDB debugger");
	559	}
6bd9bbba HP	560
6bd9bbba HP	561	static void
2c9702b2 SW	562	db_reset(db_expr_t dummy1, boolean_t dummy2, db_expr_t dummy3, char * dummy4)
	563	{
	564	cpu_reset();
6bd9bbba	565	}