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: src/sys/ddb/db_write_cmd.c,v 1.15 2005/01/06 01:34:41 imp Exp $");
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_sym.h>
40
41 /*
42 * Write to file.
43 */
44 /*ARGSUSED*/
45 void
46 db_write_cmd(address, have_addr, count, modif)
47 db_expr_t address;
48 boolean_t have_addr;
49 db_expr_t count;
50 char * modif;
51 {
52 register
53 db_addr_t addr;
54 register
55 db_expr_t old_value;
56 db_expr_t new_value;
57 register int size;
58 boolean_t wrote_one = FALSE;
59
60 addr = (db_addr_t) address;
61
62 switch (modif[0]) {
63 case 'b':
64 size = 1;
65 break;
66 case 'h':
67 size = 2;
68 break;
69 case 'l':
70 case '\0':
71 size = 4;
72 break;
73 default:
74 db_error("Unknown size\n");
75 return;
76 }
77
78 while (db_expression(&new_value)) {
79 old_value = db_get_value(addr, size, FALSE);
80 db_printsym(addr, DB_STGY_ANY);
81 db_printf("\t\t%#8lr\t=\t%#8lr\n", (long)old_value,(long)new_value);
82 db_put_value(addr, size, new_value);
83 addr += size;
84
85 wrote_one = TRUE;
86 }
87
88 if (!wrote_one)
89 db_error("Nothing written.\n");
90
91 db_next = addr;
92 db_prev = addr - size;
93
94 db_skip_to_eol();
95 }
96
97
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