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

/*
 * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_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_OSREFERENCE_LICENSE_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	*
8f6c56a5	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
1c79356b	5	*
8f6c56a5 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 License
	10	* may not be used to create, or enable the creation or redistribution of,
	11	* unlawful or unlicensed copies of an Apple operating system, or to
	12	* circumvent, violate, or enable the circumvention or violation of, any
	13	* terms of an Apple operating system software license agreement.
	14	*
	15	* Please obtain a copy of the License at
	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
	17	*
	18	* The Original Code and all software distributed under the License are
	19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
8ad349bb	24	* limitations under the License.
8f6c56a5 A	25	*
8f6c56a5 A	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
1c79356b A	27	*/
	28	/*
	29	* @OSF_COPYRIGHT@
	30	*/
1c79356b A	31	/*
	32	* Mach Operating System
	33	* Copyright (c) 1991,1990 Carnegie Mellon University
	34	* All Rights Reserved.
	35	*
	36	* Permission to use, copy, modify and distribute this software and its
	37	* documentation is hereby granted, provided that both the copyright
	38	* notice and this permission notice appear in all copies of the
	39	* software, derivative works or modified versions, and any portions
	40	* thereof, and that both notices appear in supporting documentation.
	41	*
	42	* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
	43	* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
	44	* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
	45	*
	46	* Carnegie Mellon requests users of this software to return to
	47	*
	48	* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
	49	* School of Computer Science
	50	* Carnegie Mellon University
	51	* Pittsburgh PA 15213-3890
	52	*
	53	* any improvements or extensions that they make and grant Carnegie Mellon
	54	* the rights to redistribute these changes.
	55	*/
	56	/*
	57	*/
	58	/*
	59	* Author: David B. Golub, Carnegie Mellon University
	60	* Date: 7/90
	61	*/
	62
	63	#include <mach/boolean.h>
	64	#include <kern/task.h>
	65	#include <kern/thread.h>
	66
	67	#include <machine/db_machdep.h>
	68
	69	#include <ddb/db_lex.h>
	70	#include <ddb/db_access.h>
	71	#include <ddb/db_command.h>
	72	#include <ddb/db_sym.h>
	73	#include <ddb/db_task_thread.h>
	74	#include <ddb/db_expr.h>
	75	#include <ddb/db_write_cmd.h>
	76	#include <ddb/db_output.h> /* For db_printf() */
	77
	78	/*
	79	* Write to file.
	80	*/
	81	void
	82	db_write_cmd(
	83	db_expr_t address,
	84	boolean_t have_addr,
	85	db_expr_t count,
	86	char * modif)
	87	{
	88	register db_addr_t addr;
	89	register db_expr_t old_value;
	90	db_expr_t new_value;
	91	register int size;
	92	boolean_t wrote_one = FALSE;
	93	boolean_t t_opt, u_opt;
91447636	94	thread_t thr_act;
1c79356b A	95	task_t task;
	96
	97	addr = (db_addr_t) address;
	98
	99	size = db_size_option(modif, &u_opt, &t_opt);
	100
	101	if (t_opt)
	102	{
	103	if (!db_get_next_act(&thr_act, 0))
	104	return;
	105	task = thr_act->task;
	106	}
	107	else
	108	task = db_current_space();
	109
	110	/* if user space is not explicitly specified,
	111	look in the kernel */
	112	if (!u_opt)
	113	task = TASK_NULL;
	114
	115	if (!DB_VALID_ADDRESS(addr, u_opt)) {
91447636	116	db_printf("Bad address 0x%llx\n", (unsigned long long)addr);
1c79356b A	117	return;
	118	}
	119
	120	while (db_expression(&new_value)) {
	121	old_value = db_get_task_value(addr, size, FALSE, task);
	122	db_task_printsym(addr, DB_STGY_ANY, task);
91447636	123	db_printf("\t\t%#8lln\t=\t%#8lln\n", (unsigned long long)old_value, (unsigned long long)new_value);
1c79356b A	124	db_put_task_value(addr, size, new_value, task);
	125	addr += size;
	126
	127	wrote_one = TRUE;
	128	}
	129
	130	if (!wrote_one)
	131	db_error("Nothing written.\n");
	132
	133	db_next = addr;
	134	db_prev = addr - size;
	135	}