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/*
27 * Author: David B. Golub, Carnegie Mellon University
28 * Date: 7/90
29 */
30
31#include <sys/cdefs.h>
| 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/*
27 * Author: David B. Golub, Carnegie Mellon University
28 * Date: 7/90
29 */
30
31#include <sys/cdefs.h>
|
32__FBSDID("$FreeBSD: head/sys/ddb/db_access.c 153072 2005-12-04 02:12:43Z ru $");
| 32__FBSDID("$FreeBSD: head/sys/ddb/db_access.c 273006 2014-10-12 18:01:52Z pfg $");
|
33
34#include <sys/param.h>
35#include <sys/kdb.h>
36
37#include <ddb/ddb.h>
38#include <ddb/db_access.h>
39
40/*
41 * Access unaligned data items on aligned (longword)
42 * boundaries.
43 */
44
45static unsigned db_extend[] = { /* table for sign-extending */
46 0,
47 0xFFFFFF80U,
48 0xFFFF8000U,
49 0xFF800000U
50};
51
52#ifndef BYTE_MSF
53#define BYTE_MSF 0
54#endif
55
56db_expr_t
| 33
34#include <sys/param.h>
35#include <sys/kdb.h>
36
37#include <ddb/ddb.h>
38#include <ddb/db_access.h>
39
40/*
41 * Access unaligned data items on aligned (longword)
42 * boundaries.
43 */
44
45static unsigned db_extend[] = { /* table for sign-extending */
46 0,
47 0xFFFFFF80U,
48 0xFFFF8000U,
49 0xFF800000U
50};
51
52#ifndef BYTE_MSF
53#define BYTE_MSF 0
54#endif
55
56db_expr_t
|
57db_get_value(addr, size, is_signed)
58 db_addr_t addr;
59 register int size;
60 boolean_t is_signed;
| 57db_get_value(db_addr_t addr, int size, boolean_t is_signed)
|
61{
62 char data[sizeof(u_int64_t)];
63 register db_expr_t value;
64 register int i;
65
66 if (db_read_bytes(addr, size, data) != 0) {
67 db_printf("*** error reading from address %llx ***\n",
68 (long long)addr);
69 kdb_reenter();
70 }
71
72 value = 0;
73#if BYTE_MSF
74 for (i = 0; i < size; i++)
75#else /* BYTE_LSF */
76 for (i = size - 1; i >= 0; i--)
77#endif
78 {
79 value = (value << 8) + (data[i] & 0xFF);
80 }
81
82 if (size < 4) {
83 if (is_signed && (value & db_extend[size]) != 0)
84 value |= db_extend[size];
85 }
86 return (value);
87}
88
89void
| 58{
59 char data[sizeof(u_int64_t)];
60 register db_expr_t value;
61 register int i;
62
63 if (db_read_bytes(addr, size, data) != 0) {
64 db_printf("*** error reading from address %llx ***\n",
65 (long long)addr);
66 kdb_reenter();
67 }
68
69 value = 0;
70#if BYTE_MSF
71 for (i = 0; i < size; i++)
72#else /* BYTE_LSF */
73 for (i = size - 1; i >= 0; i--)
74#endif
75 {
76 value = (value << 8) + (data[i] & 0xFF);
77 }
78
79 if (size < 4) {
80 if (is_signed && (value & db_extend[size]) != 0)
81 value |= db_extend[size];
82 }
83 return (value);
84}
85
86void
|
90db_put_value(addr, size, value)
91 db_addr_t addr;
92 register int size;
93 register db_expr_t value;
| 87db_put_value(db_addr_t addr, int size, db_expr_t value)
|
94{
95 char data[sizeof(int)];
96 register int i;
97
98#if BYTE_MSF
99 for (i = size - 1; i >= 0; i--)
100#else /* BYTE_LSF */
101 for (i = 0; i < size; i++)
102#endif
103 {
104 data[i] = value & 0xFF;
105 value >>= 8;
106 }
107
108 if (db_write_bytes(addr, size, data) != 0) {
109 db_printf("*** error writing to address %llx ***\n",
110 (long long)addr);
111 kdb_reenter();
112 }
113}
| 88{
89 char data[sizeof(int)];
90 register int i;
91
92#if BYTE_MSF
93 for (i = size - 1; i >= 0; i--)
94#else /* BYTE_LSF */
95 for (i = 0; i < size; i++)
96#endif
97 {
98 data[i] = value & 0xFF;
99 value >>= 8;
100 }
101
102 if (db_write_bytes(addr, size, data) != 0) {
103 db_printf("*** error writing to address %llx ***\n",
104 (long long)addr);
105 kdb_reenter();
106 }
107}
|