1/* $NetBSD: db_write_cmd.c,v 1.27 2015/06/06 22:06:05 matt Exp $ */
2
3/*
4 * Mach Operating System
5 * Copyright (c) 1991,1990 Carnegie Mellon University
6 * All Rights Reserved.
7 *
8 * Permission to use, copy, modify and distribute this software and its
9 * documentation is hereby granted, provided that both the copyright
10 * notice and this permission notice appear in all copies of the
11 * software, derivative works or modified versions, and any portions
12 * thereof, and that both notices appear in supporting documentation.
13 *
14 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
15 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
16 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
17 *
18 * Carnegie Mellon requests users of this software to return to
19 *
20 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
21 * School of Computer Science
22 * Carnegie Mellon University
23 * Pittsburgh PA 15213-3890
24 *
25 * any improvements or extensions that they make and grant Carnegie the
26 * rights to redistribute these changes.
27 *
28 * Author: David B. Golub, Carnegie Mellon University
29 * Date: 7/90
30 */
31
32#include <sys/cdefs.h>
33__KERNEL_RCSID(0, "$NetBSD: db_write_cmd.c,v 1.27 2015/06/06 22:06:05 matt Exp $");
34
35#include <sys/param.h>
36#include <sys/proc.h>
37
38#include <ddb/ddb.h>
39
40/*
41 * Write to file.
42 */
43/*ARGSUSED*/
44void
45db_write_cmd(db_expr_t address, bool have_addr,
46 db_expr_t count, const char *modif)
47{
48 db_addr_t addr;
49 db_expr_t old_value;
50 db_expr_t new_value;
51 int size;
52 bool wrote_one;
53 bool show_old_val;
54
55 addr = (db_addr_t) address;
56 wrote_one = false;
57 show_old_val = islower((unsigned char)modif[0]);
58
59 switch (tolower((unsigned char)modif[0])) {
60 case 'b':
61 size = 1;
62 break;
63 case 'h':
64 size = 2;
65 break;
66 case 'l':
67 case '\0':
68 size = 4;
69 break;
70 case 'q':
71 if (sizeof(db_expr_t) != sizeof(uint64_t)) {
72 size = -1;
73 db_error("q not supported\n");
74 /*NOTREACHED*/
75 }
76 case 'L':
77 size = sizeof(db_expr_t);
78 break;
79 default:
80 size = -1;
81 db_error("Unknown size\n");
82 /*NOTREACHED*/
83 }
84
85 while (db_expression(&new_value)) {
86 db_printsym(addr, DB_STGY_ANY, db_printf);
87 if (show_old_val) {
88 old_value = db_get_value(addr, size, false);
89 db_printf("\t\t%s = ", db_num_to_str(old_value));
90 db_printf("%s\n", db_num_to_str(new_value));
91 }
92 else
93 db_printf("\t\t= %s\n", db_num_to_str(new_value));
94 db_put_value(addr, size, new_value);
95 addr += size;
96
97 wrote_one = true;
98 }
99
100 if (!wrote_one) {
101 db_error("Nothing written.\n");
102 /*NOTREACHED*/
103 }
104
105 db_next = addr;
106 db_prev = addr - size;
107
108 db_skip_to_eol();
109}
110