1 /* $NetBSD: db_write_cmd.c,v 1.28 2019/02/03 03:19:26 mrg 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 1.28 2019/02/03 03:19:26 mrg 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*/
44 void
db_write_cmd(db_expr_t address,bool have_addr,db_expr_t count,const char * modif)45 db_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 /* FALLTHROUGH */
77 case 'L':
78 size = sizeof(db_expr_t);
79 break;
80 default:
81 size = -1;
82 db_error("Unknown size\n");
83 /*NOTREACHED*/
84 }
85
86 while (db_expression(&new_value)) {
87 db_printsym(addr, DB_STGY_ANY, db_printf);
88 if (show_old_val) {
89 old_value = db_get_value(addr, size, false);
90 db_printf("\t\t%s = ", db_num_to_str(old_value));
91 db_printf("%s\n", db_num_to_str(new_value));
92 }
93 else
94 db_printf("\t\t= %s\n", db_num_to_str(new_value));
95 db_put_value(addr, size, new_value);
96 addr += size;
97
98 wrote_one = true;
99 }
100
101 if (!wrote_one) {
102 db_error("Nothing written.\n");
103 /*NOTREACHED*/
104 }
105
106 db_next = addr;
107 db_prev = addr - size;
108
109 db_skip_to_eol();
110 }
111