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*/
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		/* 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