]>
git.saurik.com Git - apple/xnu.git/blob - osfmk/ddb/db_access.c
bd29b746d82c6b02414a1617cd36348438bc2c84
2 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
4 * @APPLE_LICENSE_HEADER_START@
6 * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
8 * This file contains Original Code and/or Modifications of Original Code
9 * as defined in and that are subject to the Apple Public Source License
10 * Version 2.0 (the 'License'). You may not use this file except in
11 * compliance with the License. Please obtain a copy of the License at
12 * http://www.opensource.apple.com/apsl/ and read it before using this
15 * The Original Code and all software distributed under the License are
16 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
17 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
18 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
20 * Please see the License for the specific language governing rights and
21 * limitations under the License.
23 * @APPLE_LICENSE_HEADER_END@
29 * Mach Operating System
30 * Copyright (c) 1991,1990 Carnegie Mellon University
31 * All Rights Reserved.
33 * Permission to use, copy, modify and distribute this software and its
34 * documentation is hereby granted, provided that both the copyright
35 * notice and this permission notice appear in all copies of the
36 * software, derivative works or modified versions, and any portions
37 * thereof, and that both notices appear in supporting documentation.
39 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
40 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
41 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
43 * Carnegie Mellon requests users of this software to return to
45 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
46 * School of Computer Science
47 * Carnegie Mellon University
48 * Pittsburgh PA 15213-3890
50 * any improvements or extensions that they make and grant Carnegie Mellon
51 * the rights to redistribute these changes.
56 * Author: David B. Golub, Carnegie Mellon University
59 #include <mach/boolean.h>
60 #include <machine/db_machdep.h> /* type definitions */
61 #include <machine/setjmp.h>
62 #include <machine/endian.h>
63 #include <kern/task.h>
64 #include <ddb/db_access.h>
69 * Access unaligned data items on aligned (longword)
73 int db_access_level
= DB_ACCESS_LEVEL
;
76 * This table is for sign-extending things.
77 * Therefore its entries are signed, and yes
78 * they are in fact negative numbers.
79 * So don't put Us in it. Or Ls either.
80 * Otherwise there is no point having it, n'est pas ?
82 static int db_extend
[sizeof(long)+1] = { /* table for sign-extending */
83 #if defined(__arch64__)
93 #else /* !defined(__arch64__) */
99 #endif /* defined(__arch64__) */
109 char data
[sizeof(db_expr_t
)];
110 register db_expr_t value
;
113 db_read_bytes((vm_offset_t
)addr
, size
, data
, task
);
117 for (i
= 0; i
< size
; i
++)
119 for (i
= size
- 1; i
>= 0; i
--)
122 value
= (value
<< 8) + (data
[i
] & 0xFF);
125 if (size
<= sizeof(int)) {
126 if (is_signed
&& (value
& db_extend
[size
]) != 0)
127 value
|= db_extend
[size
];
136 register db_expr_t value
,
139 char data
[sizeof(db_expr_t
)];
143 for (i
= size
- 1; i
>= 0; i
--)
145 for (i
= 0; i
< size
; i
++)
148 data
[i
] = value
& 0xFF;
152 db_write_bytes((vm_offset_t
)addr
, size
, data
, task
);
161 return(db_get_task_value(addr
, size
, is_signed
, TASK_NULL
));
170 db_put_task_value(addr
, size
, value
, TASK_NULL
);