[apple/xnu.git] / osfmk / ddb / db_write_cmd.c

/*
 * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code 
 * as defined in and that are subject to the Apple Public Source License 
 * Version 2.0 (the 'License'). You may not use this file except in 
 * compliance with the License.  The rights granted to you under the 
 * License may not be used to create, or enable the creation or 
 * redistribution of, unlawful or unlicensed copies of an Apple operating 
 * system, or to circumvent, violate, or enable the circumvention or 
 * violation of, any terms of an Apple operating system software license 
 * agreement.
 *
 * Please obtain a copy of the License at 
 * http://www.opensource.apple.com/apsl/ and read it before using this 
 * file.
 *
 * The Original Code and all software distributed under the License are 
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 
 * Please see the License for the specific language governing rights and 
 * limitations under the License.
 *
 * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
 */
/*
 * @OSF_COPYRIGHT@
 */
/* 
 * 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 "AS IS"
 * 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 Mellon
 * the rights to redistribute these changes.
 */
/*
 */
/*
 *	Author: David B. Golub,  Carnegie Mellon University
 *	Date:	7/90
 */

#include <mach/boolean.h>
#include <kern/task.h>
#include <kern/thread.h>

#include <machine/db_machdep.h>

#include <ddb/db_lex.h>
#include <ddb/db_access.h>
#include <ddb/db_command.h>
#include <ddb/db_sym.h>
#include <ddb/db_task_thread.h>
#include <ddb/db_expr.h>
#include <ddb/db_write_cmd.h>
#include <ddb/db_output.h>			/* For db_printf() */

/*
 * Write to file.
 */
void
db_write_cmd(
	db_expr_t	address,
	boolean_t	have_addr,
	db_expr_t	count,
	char *		modif)
{
	register db_addr_t	addr;
	register db_expr_t	old_value;
	db_expr_t	new_value;
	register int	size;
	boolean_t	wrote_one = FALSE;
	boolean_t	t_opt, u_opt;
	thread_t	thr_act;
	task_t		task;

	addr = (db_addr_t) address;

	size = db_size_option(modif, &u_opt, &t_opt);

	if (t_opt) 
	  {
	    if (!db_get_next_act(&thr_act, 0))
	      return;
	    task = thr_act->task;
	  }
	else
	  task = db_current_space();

	/* if user space is not explicitly specified, 
	   look in the kernel */
	if (!u_opt)
	  task = TASK_NULL;

	if (!DB_VALID_ADDRESS(addr, u_opt)) {
	  db_printf("Bad address 0x%llx\n", (unsigned long long)addr);
	  return;
	}

	while (db_expression(&new_value)) {
	    old_value = db_get_task_value(addr, size, FALSE, task);
	    db_task_printsym(addr, DB_STGY_ANY, task);
	    db_printf("\t\t%#8lln\t=\t%#8lln\n", (unsigned long long)old_value, (unsigned long long)new_value);
	    db_put_task_value(addr, size, new_value, task);
	    addr += size;

	    wrote_one = TRUE;
	}

	if (!wrote_one)
	    db_error("Nothing written.\n");

	db_next = addr;
	db_prev = addr - size;
}
Commit	Line	Data
1c79356b	1	/*
91447636	2	* Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
1c79356b	3	*
8ad349bb	4	* @APPLE_LICENSE_OSREFERENCE_HEADER_START@
1c79356b	5	*
8ad349bb A	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. The rights granted to you under the
	10	* License may not be used to create, or enable the creation or
	11	* redistribution of, unlawful or unlicensed copies of an Apple operating
	12	* system, or to circumvent, violate, or enable the circumvention or
	13	* violation of, any terms of an Apple operating system software license
	14	* agreement.
	15	*
	16	* Please obtain a copy of the License at
	17	* http://www.opensource.apple.com/apsl/ and read it before using this
	18	* file.
	19	*
	20	* The Original Code and all software distributed under the License are
	21	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	22	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	23	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	24	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	25	* Please see the License for the specific language governing rights and
	26	* limitations under the License.
	27	*
	28	* @APPLE_LICENSE_OSREFERENCE_HEADER_END@
1c79356b A	29	*/
	30	/*
	31	* @OSF_COPYRIGHT@
	32	*/
1c79356b A	33	/*
	34	* Mach Operating System
	35	* Copyright (c) 1991,1990 Carnegie Mellon University
	36	* All Rights Reserved.
	37	*
	38	* Permission to use, copy, modify and distribute this software and its
	39	* documentation is hereby granted, provided that both the copyright
	40	* notice and this permission notice appear in all copies of the
	41	* software, derivative works or modified versions, and any portions
	42	* thereof, and that both notices appear in supporting documentation.
	43	*
	44	* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
	45	* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
	46	* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
	47	*
	48	* Carnegie Mellon requests users of this software to return to
	49	*
	50	* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
	51	* School of Computer Science
	52	* Carnegie Mellon University
	53	* Pittsburgh PA 15213-3890
	54	*
	55	* any improvements or extensions that they make and grant Carnegie Mellon
	56	* the rights to redistribute these changes.
	57	*/
	58	/*
	59	*/
	60	/*
	61	* Author: David B. Golub, Carnegie Mellon University
	62	* Date: 7/90
	63	*/
	64
	65	#include <mach/boolean.h>
	66	#include <kern/task.h>
	67	#include <kern/thread.h>
	68
	69	#include <machine/db_machdep.h>
	70
	71	#include <ddb/db_lex.h>
	72	#include <ddb/db_access.h>
	73	#include <ddb/db_command.h>
	74	#include <ddb/db_sym.h>
	75	#include <ddb/db_task_thread.h>
	76	#include <ddb/db_expr.h>
	77	#include <ddb/db_write_cmd.h>
	78	#include <ddb/db_output.h> /* For db_printf() */
	79
	80	/*
	81	* Write to file.
	82	*/
	83	void
	84	db_write_cmd(
	85	db_expr_t address,
	86	boolean_t have_addr,
	87	db_expr_t count,
	88	char * modif)
	89	{
	90	register db_addr_t addr;
	91	register db_expr_t old_value;
	92	db_expr_t new_value;
	93	register int size;
	94	boolean_t wrote_one = FALSE;
	95	boolean_t t_opt, u_opt;
91447636	96	thread_t thr_act;
1c79356b A	97	task_t task;
	98
	99	addr = (db_addr_t) address;
	100
	101	size = db_size_option(modif, &u_opt, &t_opt);
	102
	103	if (t_opt)
	104	{
	105	if (!db_get_next_act(&thr_act, 0))
	106	return;
	107	task = thr_act->task;
	108	}
	109	else
	110	task = db_current_space();
	111
	112	/* if user space is not explicitly specified,
	113	look in the kernel */
	114	if (!u_opt)
	115	task = TASK_NULL;
	116
	117	if (!DB_VALID_ADDRESS(addr, u_opt)) {
91447636	118	db_printf("Bad address 0x%llx\n", (unsigned long long)addr);
1c79356b A	119	return;
	120	}
	121
	122	while (db_expression(&new_value)) {
	123	old_value = db_get_task_value(addr, size, FALSE, task);
	124	db_task_printsym(addr, DB_STGY_ANY, task);
91447636	125	db_printf("\t\t%#8lln\t=\t%#8lln\n", (unsigned long long)old_value, (unsigned long long)new_value);
1c79356b A	126	db_put_task_value(addr, size, new_value, task);
	127	addr += size;
	128
	129	wrote_one = TRUE;
	130	}
	131
	132	if (!wrote_one)
	133	db_error("Nothing written.\n");
	134
	135	db_next = addr;
	136	db_prev = addr - size;
	137	}