[dragonfly.git] / sys / ddb / db_run.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_run.c,v 1.18 1999/08/28 00:41:10 peter Exp $
 * $DragonFly: src/sys/ddb/db_run.c,v 1.8 2008/08/25 17:01:37 dillon Exp $
 */

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

/*
 * Commands to run process.
 */
#include <sys/param.h>

#include <vm/vm.h>

#include <ddb/ddb.h>
#include <ddb/db_break.h>
#include <ddb/db_access.h>

static int	db_run_mode;
#define	STEP_NONE	0
#define	STEP_ONCE	1
#define	STEP_RETURN	2
#define	STEP_CALLT	3
#define	STEP_CONTINUE	4
#define STEP_INVISIBLE	5
#define	STEP_COUNT	6

static boolean_t	db_sstep_print;
static int		db_loop_count;
static int		db_call_depth;

int		db_inst_count;
int		db_load_count;
int		db_store_count;

#ifndef db_set_single_step
extern void	db_set_single_step (db_regs_t *regs);
#endif
#ifndef db_clear_single_step
extern void	db_clear_single_step (db_regs_t *regs);
#endif

#ifdef notused
static void	db_single_step (db_regs_t *regs);
#endif

boolean_t
db_stop_at_pc(boolean_t *is_breakpoint)
{
	db_addr_t	pc;
	db_breakpoint_t bkpt;

	db_clear_single_step(DDB_REGS);
	db_clear_breakpoints();
	db_clear_watchpoints();
	pc = PC_REGS(DDB_REGS);

#ifdef	FIXUP_PC_AFTER_BREAK
	if (*is_breakpoint) {
	    /*
	     * Breakpoint trap.  Fix up the PC if the
	     * machine requires it.
	     */
	    FIXUP_PC_AFTER_BREAK
	    pc = PC_REGS(DDB_REGS);
	}
#endif

	/*
	 * Now check for a breakpoint at this address.
	 */
	bkpt = db_find_breakpoint_here(pc);
	if (bkpt) {
	    if (--bkpt->count == 0) {
		bkpt->count = bkpt->init_count;
		*is_breakpoint = TRUE;
		return (TRUE);	/* stop here */
	    }
	} else if (*is_breakpoint) {
#ifdef __i386__			/* XXx */
		ddb_regs.tf_eip += 1;
#elif defined(__x86_64__)
		ddb_regs.tf_rip += 1;
#endif
	}

	*is_breakpoint = FALSE;

	if (db_run_mode == STEP_INVISIBLE) {
	    db_run_mode = STEP_CONTINUE;
	    return (FALSE);	/* continue */
	}
	if (db_run_mode == STEP_COUNT) {
	    return (FALSE); /* continue */
	}
	if (db_run_mode == STEP_ONCE) {
	    if (--db_loop_count > 0) {
		if (db_sstep_print) {
		    db_printf("\t\t");
		    db_print_loc_and_inst(pc, DDB_REGS);
		    db_printf("\n");
		}
		return (FALSE);	/* continue */
	    }
	}
	if (db_run_mode == STEP_RETURN) {
	    db_expr_t ins = db_get_value(pc, sizeof(int), FALSE);

	    /* continue until matching return */

	    if (!inst_trap_return(ins) &&
		(!inst_return(ins) || --db_call_depth != 0)) {
		if (db_sstep_print) {
		    if (inst_call(ins) || inst_return(ins)) {
			int i;

			db_printf("[after %6d]     ", db_inst_count);
			for (i = db_call_depth; --i > 0; )
			    db_printf("  ");
			db_print_loc_and_inst(pc, DDB_REGS);
			db_printf("\n");
		    }
		}
		if (inst_call(ins))
		    db_call_depth++;
		return (FALSE);	/* continue */
	    }
	}
	if (db_run_mode == STEP_CALLT) {
	    db_expr_t ins = db_get_value(pc, sizeof(int), FALSE);

	    /* continue until call or return */

	    if (!inst_call(ins) &&
		!inst_return(ins) &&
		!inst_trap_return(ins)) {
		return (FALSE);	/* continue */
	    }
	}
	db_run_mode = STEP_NONE;
	return (TRUE);
}

void
db_restart_at_pc(boolean_t watchpt)
{
	db_addr_t	pc = PC_REGS(DDB_REGS);

	if ((db_run_mode == STEP_COUNT) ||
	    (db_run_mode == STEP_RETURN) ||
	    (db_run_mode == STEP_CALLT)) {
	    db_expr_t		ins;

	    /*
	     * We are about to execute this instruction,
	     * so count it now.
	     */

	    ins = db_get_value(pc, sizeof(int), FALSE);
	    db_inst_count++;
	    db_load_count += inst_load(ins);
	    db_store_count += inst_store(ins);
#ifdef	SOFTWARE_SSTEP
	    /* XXX works on mips, but... */
	    if (inst_branch(ins) || inst_call(ins)) {
		ins = db_get_value(next_instr_address(pc,1),
				   sizeof(int), FALSE);
		db_inst_count++;
		db_load_count += inst_load(ins);
		db_store_count += inst_store(ins);
	    }
#endif	/* SOFTWARE_SSTEP */
	}

	if (db_run_mode == STEP_CONTINUE) {
	    if (watchpt || db_find_breakpoint_here(pc)) {
		/*
		 * Step over breakpoint/watchpoint.
		 */
		db_run_mode = STEP_INVISIBLE;
		db_set_single_step(DDB_REGS);
	    } else {
		db_set_breakpoints();
		db_set_watchpoints();
	    }
	} else {
	    db_set_single_step(DDB_REGS);
	}
}

#ifdef notused
static void
db_single_step(db_regs_t *regs)
{
	if (db_run_mode == STEP_CONTINUE) {
	    db_run_mode = STEP_INVISIBLE;
	    db_set_single_step(regs);
	}
}
#endif

#ifdef	SOFTWARE_SSTEP
/*
 *	Software implementation of single-stepping.
 *	If your machine does not have a trace mode
 *	similar to the vax or sun ones you can use
 *	this implementation, done for the mips.
 *	Just define the above conditional and provide
 *	the functions/macros defined below.
 *
 * extern boolean_t
 *	inst_branch(),		returns true if the instruction might branch
 * extern unsigned
 *	branch_taken(),		return the address the instruction might
 *				branch to
 *	db_getreg_val();	return the value of a user register,
 *				as indicated in the hardware instruction
 *				encoding, e.g. 8 for r8
 *
 * next_instr_address(pc,bd)	returns the address of the first
 *				instruction following the one at "pc",
 *				which is either in the taken path of
 *				the branch (bd==1) or not.  This is
 *				for machines (mips) with branch delays.
 *
 *	A single-step may involve at most 2 breakpoints -
 *	one for branch-not-taken and one for branch taken.
 *	If one of these addresses does not already have a breakpoint,
 *	we allocate a breakpoint and save it here.
 *	These breakpoints are deleted on return.
 */
db_breakpoint_t	db_not_taken_bkpt = 0;
db_breakpoint_t	db_taken_bkpt = 0;

void
db_set_single_step(db_regs_t *regs)
{
	db_addr_t pc = PC_REGS(regs), brpc;
	 unsigned	 inst;

	/*
	 *	User was stopped at pc, e.g. the instruction
	 *	at pc was not executed.
	 */
	inst = db_get_value(pc, sizeof(int), FALSE);
	if (inst_branch(inst) || inst_call(inst)) {
	    brpc = branch_taken(inst, pc, regs);
	    if (brpc != pc) {	/* self-branches are hopeless */
		db_taken_bkpt = db_set_temp_breakpoint(brpc);
	    }
	    pc = next_instr_address(pc,1);
	}
	pc = next_instr_address(pc,0);
	db_not_taken_bkpt = db_set_temp_breakpoint(pc);
}

void
db_clear_single_step(db_regs_t *regs)
{

	if (db_not_taken_bkpt != 0) {
	    db_delete_temp_breakpoint(db_not_taken_bkpt);
	    db_not_taken_bkpt = 0;
	}
	if (db_taken_bkpt != 0) {
	    db_delete_temp_breakpoint(db_taken_bkpt);
	    db_taken_bkpt = 0;
	}
}

#endif /* SOFTWARE_SSTEP */

extern int	db_cmd_loop_done;

/* single-step */
/*ARGSUSED*/
void
db_single_step_cmd(db_expr_t addr, boolean_t have_addr, db_expr_t count,
		   char *modif)
{
	boolean_t	print = FALSE;

	if (count == -1)
	    count = 1;

	if (modif[0] == 'p')
	    print = TRUE;

	db_run_mode = STEP_ONCE;
	db_loop_count = count;
	db_sstep_print = print;
	db_inst_count = 0;
	db_load_count = 0;
	db_store_count = 0;

	db_cmd_loop_done = 1;
}

/* trace and print until call/return */
/*ARGSUSED*/
void
db_trace_until_call_cmd(db_expr_t addr, boolean_t have_addr, db_expr_t count,
			char *modif)
{
	boolean_t	print = FALSE;

	if (modif[0] == 'p')
	    print = TRUE;

	db_run_mode = STEP_CALLT;
	db_sstep_print = print;
	db_inst_count = 0;
	db_load_count = 0;
	db_store_count = 0;

	db_cmd_loop_done = 1;
}

/*ARGSUSED*/
void
db_trace_until_matching_cmd(db_expr_t addr, boolean_t have_addr,
			    db_expr_t count, char *modif)
{
	boolean_t	print = FALSE;

	if (modif[0] == 'p')
	    print = TRUE;

	db_run_mode = STEP_RETURN;
	db_call_depth = 1;
	db_sstep_print = print;
	db_inst_count = 0;
	db_load_count = 0;
	db_store_count = 0;

	db_cmd_loop_done = 1;
}

/* continue */
/*ARGSUSED*/
void
db_continue_cmd(db_expr_t addr, boolean_t have_addr, db_expr_t count,
		char *modif)
{
	if (modif[0] == 'c')
	    db_run_mode = STEP_COUNT;
	else
	    db_run_mode = STEP_CONTINUE;
	db_inst_count = 0;
	db_load_count = 0;
	db_store_count = 0;

	db_cmd_loop_done = 1;
}
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_run.c,v 1.18 1999/08/28 00:41:10 peter Exp $
cfd17028	27	* $DragonFly: src/sys/ddb/db_run.c,v 1.8 2008/08/25 17:01:37 dillon Exp $
984263bc MD	28	*/
	29
	30	/*
	31	* Author: David B. Golub, Carnegie Mellon University
	32	* Date: 7/90
	33	*/
	34
	35	/*
	36	* Commands to run process.
	37	*/
	38	#include <sys/param.h>
	39
	40	#include <vm/vm.h>
	41
	42	#include <ddb/ddb.h>
	43	#include <ddb/db_break.h>
	44	#include <ddb/db_access.h>
	45
	46	static int db_run_mode;
	47	#define STEP_NONE 0
	48	#define STEP_ONCE 1
	49	#define STEP_RETURN 2
	50	#define STEP_CALLT 3
	51	#define STEP_CONTINUE 4
	52	#define STEP_INVISIBLE 5
	53	#define STEP_COUNT 6
	54
	55	static boolean_t db_sstep_print;
	56	static int db_loop_count;
	57	static int db_call_depth;
	58
	59	int db_inst_count;
	60	int db_load_count;
	61	int db_store_count;
	62
	63	#ifndef db_set_single_step
43c0ece6	64	extern void db_set_single_step (db_regs_t *regs);
984263bc MD	65	#endif
984263bc MD	66	#ifndef db_clear_single_step
43c0ece6	67	extern void db_clear_single_step (db_regs_t *regs);
984263bc MD	68	#endif
	69
	70	#ifdef notused
43c0ece6	71	static void db_single_step (db_regs_t *regs);
984263bc MD	72	#endif
	73
	74	boolean_t
2c9702b2	75	db_stop_at_pc(boolean_t *is_breakpoint)
984263bc	76	{
ad0290bd RG	77	db_addr_t pc;
ad0290bd RG	78	db_breakpoint_t bkpt;
984263bc MD	79
	80	db_clear_single_step(DDB_REGS);
	81	db_clear_breakpoints();
	82	db_clear_watchpoints();
	83	pc = PC_REGS(DDB_REGS);
	84
	85	#ifdef FIXUP_PC_AFTER_BREAK
	86	if (*is_breakpoint) {
	87	/*
	88	* Breakpoint trap. Fix up the PC if the
	89	* machine requires it.
	90	*/
	91	FIXUP_PC_AFTER_BREAK
	92	pc = PC_REGS(DDB_REGS);
	93	}
	94	#endif
	95
	96	/*
	97	* Now check for a breakpoint at this address.
	98	*/
	99	bkpt = db_find_breakpoint_here(pc);
	100	if (bkpt) {
	101	if (--bkpt->count == 0) {
	102	bkpt->count = bkpt->init_count;
	103	*is_breakpoint = TRUE;
	104	return (TRUE); /* stop here */
	105	}
	106	} else if (*is_breakpoint) {
	107	#ifdef __i386__ /* XXx */
	108	ddb_regs.tf_eip += 1;
c1543a89	109	#elif defined(__x86_64__)
cfd17028	110	ddb_regs.tf_rip += 1;
984263bc MD	111	#endif
	112	}
	113
	114	*is_breakpoint = FALSE;
	115
	116	if (db_run_mode == STEP_INVISIBLE) {
	117	db_run_mode = STEP_CONTINUE;
	118	return (FALSE); /* continue */
	119	}
	120	if (db_run_mode == STEP_COUNT) {
	121	return (FALSE); /* continue */
	122	}
	123	if (db_run_mode == STEP_ONCE) {
	124	if (--db_loop_count > 0) {
	125	if (db_sstep_print) {
	126	db_printf("\t\t");
2729d8bd	127	db_print_loc_and_inst(pc, DDB_REGS);
984263bc MD	128	db_printf("\n");
	129	}
	130	return (FALSE); /* continue */
	131	}
	132	}
	133	if (db_run_mode == STEP_RETURN) {
	134	db_expr_t ins = db_get_value(pc, sizeof(int), FALSE);
	135
	136	/* continue until matching return */
	137
	138	if (!inst_trap_return(ins) &&
	139	(!inst_return(ins) \|\| --db_call_depth != 0)) {
	140	if (db_sstep_print) {
	141	if (inst_call(ins) \|\| inst_return(ins)) {
ad0290bd	142	int i;
984263bc MD	143
	144	db_printf("[after %6d] ", db_inst_count);
	145	for (i = db_call_depth; --i > 0; )
	146	db_printf(" ");
2729d8bd	147	db_print_loc_and_inst(pc, DDB_REGS);
984263bc MD	148	db_printf("\n");
	149	}
	150	}
	151	if (inst_call(ins))
	152	db_call_depth++;
	153	return (FALSE); /* continue */
	154	}
	155	}
	156	if (db_run_mode == STEP_CALLT) {
	157	db_expr_t ins = db_get_value(pc, sizeof(int), FALSE);
	158
	159	/* continue until call or return */
	160
	161	if (!inst_call(ins) &&
	162	!inst_return(ins) &&
	163	!inst_trap_return(ins)) {
	164	return (FALSE); /* continue */
	165	}
	166	}
	167	db_run_mode = STEP_NONE;
	168	return (TRUE);
	169	}
	170
	171	void
2c9702b2	172	db_restart_at_pc(boolean_t watchpt)
984263bc	173	{
ad0290bd	174	db_addr_t pc = PC_REGS(DDB_REGS);
984263bc MD	175
	176	if ((db_run_mode == STEP_COUNT) \|\|
	177	(db_run_mode == STEP_RETURN) \|\|
	178	(db_run_mode == STEP_CALLT)) {
	179	db_expr_t ins;
	180
	181	/*
	182	* We are about to execute this instruction,
	183	* so count it now.
	184	*/
	185
	186	ins = db_get_value(pc, sizeof(int), FALSE);
	187	db_inst_count++;
	188	db_load_count += inst_load(ins);
	189	db_store_count += inst_store(ins);
	190	#ifdef SOFTWARE_SSTEP
	191	/* XXX works on mips, but... */
	192	if (inst_branch(ins) \|\| inst_call(ins)) {
	193	ins = db_get_value(next_instr_address(pc,1),
	194	sizeof(int), FALSE);
	195	db_inst_count++;
	196	db_load_count += inst_load(ins);
	197	db_store_count += inst_store(ins);
	198	}
6b08710e	199	#endif /* SOFTWARE_SSTEP */
984263bc MD	200	}
	201
	202	if (db_run_mode == STEP_CONTINUE) {
	203	if (watchpt \|\| db_find_breakpoint_here(pc)) {
	204	/*
	205	* Step over breakpoint/watchpoint.
	206	*/
	207	db_run_mode = STEP_INVISIBLE;
	208	db_set_single_step(DDB_REGS);
	209	} else {
	210	db_set_breakpoints();
	211	db_set_watchpoints();
	212	}
	213	} else {
	214	db_set_single_step(DDB_REGS);
	215	}
	216	}
	217
	218	#ifdef notused
	219	static void
2c9702b2	220	db_single_step(db_regs_t *regs)
984263bc MD	221	{
	222	if (db_run_mode == STEP_CONTINUE) {
	223	db_run_mode = STEP_INVISIBLE;
	224	db_set_single_step(regs);
	225	}
	226	}
	227	#endif
	228
	229	#ifdef SOFTWARE_SSTEP
	230	/*
	231	* Software implementation of single-stepping.
	232	* If your machine does not have a trace mode
	233	* similar to the vax or sun ones you can use
	234	* this implementation, done for the mips.
	235	* Just define the above conditional and provide
	236	* the functions/macros defined below.
	237	*
	238	* extern boolean_t
	239	* inst_branch(), returns true if the instruction might branch
	240	* extern unsigned
	241	* branch_taken(), return the address the instruction might
	242	* branch to
	243	* db_getreg_val(); return the value of a user register,
	244	* as indicated in the hardware instruction
	245	* encoding, e.g. 8 for r8
	246	*
	247	* next_instr_address(pc,bd) returns the address of the first
	248	* instruction following the one at "pc",
	249	* which is either in the taken path of
	250	* the branch (bd==1) or not. This is
	251	* for machines (mips) with branch delays.
	252	*
	253	* A single-step may involve at most 2 breakpoints -
	254	* one for branch-not-taken and one for branch taken.
	255	* If one of these addresses does not already have a breakpoint,
	256	* we allocate a breakpoint and save it here.
	257	* These breakpoints are deleted on return.
	258	*/
	259	db_breakpoint_t db_not_taken_bkpt = 0;
	260	db_breakpoint_t db_taken_bkpt = 0;
	261
	262	void
2c9702b2	263	db_set_single_step(db_regs_t *regs)
984263bc MD	264	{
	265	db_addr_t pc = PC_REGS(regs), brpc;
	266	unsigned inst;
	267
	268	/*
	269	* User was stopped at pc, e.g. the instruction
	270	* at pc was not executed.
	271	*/
	272	inst = db_get_value(pc, sizeof(int), FALSE);
	273	if (inst_branch(inst) \|\| inst_call(inst)) {
	274	brpc = branch_taken(inst, pc, regs);
	275	if (brpc != pc) { /* self-branches are hopeless */
	276	db_taken_bkpt = db_set_temp_breakpoint(brpc);
	277	}
	278	pc = next_instr_address(pc,1);
	279	}
	280	pc = next_instr_address(pc,0);
	281	db_not_taken_bkpt = db_set_temp_breakpoint(pc);
	282	}
	283
	284	void
2c9702b2	285	db_clear_single_step(db_regs_t *regs)
984263bc MD	286	{
	287
	288	if (db_not_taken_bkpt != 0) {
	289	db_delete_temp_breakpoint(db_not_taken_bkpt);
	290	db_not_taken_bkpt = 0;
	291	}
	292	if (db_taken_bkpt != 0) {
	293	db_delete_temp_breakpoint(db_taken_bkpt);
	294	db_taken_bkpt = 0;
	295	}
	296	}
	297
6b08710e	298	#endif /* SOFTWARE_SSTEP */
984263bc MD	299
	300	extern int db_cmd_loop_done;
	301
	302	/* single-step */
	303	/ARGSUSED/
	304	void
2c9702b2 SW	305	db_single_step_cmd(db_expr_t addr, boolean_t have_addr, db_expr_t count,
2c9702b2 SW	306	char *modif)
984263bc MD	307	{
	308	boolean_t print = FALSE;
	309
	310	if (count == -1)
	311	count = 1;
	312
	313	if (modif[0] == 'p')
	314	print = TRUE;
	315
	316	db_run_mode = STEP_ONCE;
	317	db_loop_count = count;
	318	db_sstep_print = print;
	319	db_inst_count = 0;
	320	db_load_count = 0;
	321	db_store_count = 0;
	322
	323	db_cmd_loop_done = 1;
	324	}
	325
	326	/* trace and print until call/return */
	327	/ARGSUSED/
	328	void
2c9702b2 SW	329	db_trace_until_call_cmd(db_expr_t addr, boolean_t have_addr, db_expr_t count,
2c9702b2 SW	330	char *modif)
984263bc MD	331	{
	332	boolean_t print = FALSE;
	333
	334	if (modif[0] == 'p')
	335	print = TRUE;
	336
	337	db_run_mode = STEP_CALLT;
	338	db_sstep_print = print;
	339	db_inst_count = 0;
	340	db_load_count = 0;
	341	db_store_count = 0;
	342
	343	db_cmd_loop_done = 1;
	344	}
	345
	346	/ARGSUSED/
	347	void
2c9702b2 SW	348	db_trace_until_matching_cmd(db_expr_t addr, boolean_t have_addr,
2c9702b2 SW	349	db_expr_t count, char *modif)
984263bc MD	350	{
	351	boolean_t print = FALSE;
	352
	353	if (modif[0] == 'p')
	354	print = TRUE;
	355
	356	db_run_mode = STEP_RETURN;
	357	db_call_depth = 1;
	358	db_sstep_print = print;
	359	db_inst_count = 0;
	360	db_load_count = 0;
	361	db_store_count = 0;
	362
	363	db_cmd_loop_done = 1;
	364	}
	365
	366	/* continue */
	367	/ARGSUSED/
	368	void
2c9702b2 SW	369	db_continue_cmd(db_expr_t addr, boolean_t have_addr, db_expr_t count,
2c9702b2 SW	370	char *modif)
984263bc MD	371	{
	372	if (modif[0] == 'c')
	373	db_run_mode = STEP_COUNT;
	374	else
	375	db_run_mode = STEP_CONTINUE;
	376	db_inst_count = 0;
	377	db_load_count = 0;
	378	db_store_count = 0;
	379
	380	db_cmd_loop_done = 1;
	381	}