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 * $FreeBSD: src/sys/ddb/db_write_cmd.c,v 1.13 1999/08/28 00:41:12 peter Exp $
27 */
28
29 /*
30 * Author: David B. Golub, Carnegie Mellon University
31 * Date: 7/90
32 */
33
34 #include <sys/param.h>
35
36 #include <ddb/ddb.h>
37 #include <ddb/db_access.h>
38 #include <ddb/db_command.h>
39 #include <ddb/db_lex.h>
40 #include <ddb/db_sym.h>
41
42 /*
43 * Write to file.
44 */
45 /*ARGSUSED*/
46 void
db_write_cmd(db_expr_t address,boolean_t have_addr,db_expr_t count,char * modif)47 db_write_cmd(db_expr_t address, boolean_t have_addr, db_expr_t count,
48 char *modif)
49 {
50 db_addr_t addr;
51 db_expr_t old_value;
52 db_expr_t new_value;
53 int size;
54 boolean_t wrote_one = FALSE;
55
56 addr = (db_addr_t) address;
57
58 switch (modif[0]) {
59 case 'b':
60 size = 1;
61 break;
62 case 'h':
63 size = 2;
64 break;
65 case 'l':
66 case '\0':
67 size = 4;
68 break;
69 default:
70 db_error("Unknown size\n");
71 return;
72 }
73
74 while (db_expression(&new_value)) {
75 old_value = db_get_value(addr, size, FALSE);
76 db_printsym(addr, DB_STGY_ANY);
77 db_printf("\t\t%s = ", db_num_to_str(old_value));
78 db_printf("%s\n", db_num_to_str(new_value));
79 db_put_value(addr, size, new_value);
80 addr += size;
81
82 wrote_one = TRUE;
83 }
84
85 if (!wrote_one)
86 db_error("Nothing written.\n");
87
88 db_next = addr;
89 db_prev = addr - size;
90
91 db_skip_to_eol();
92 }
93
94