1 /*-
2 * SPDX-License-Identifier: MIT-CMU
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
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 /*
29 * Author: David B. Golub, Carnegie Mellon University
30 * Date: 7/90
31 */
32
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
35
36 #include <sys/param.h>
37
38 #include <ddb/ddb.h>
39 #include <ddb/db_access.h>
40 #include <ddb/db_command.h>
41 #include <ddb/db_sym.h>
42
43 /*
44 * Write to file.
45 */
46 /*ARGSUSED*/
47 void
48 db_write_cmd(db_expr_t address, bool have_addr, db_expr_t count,
49 char * modif)
50 {
51 db_addr_t addr;
52 db_expr_t old_value;
53 db_expr_t new_value;
54 int size;
55 bool wrote_one = false;
56
57 addr = (db_addr_t) address;
58
59 switch (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 default:
71 db_error("Unknown size\n");
72 return;
73 }
74
75 while (db_expression(&new_value)) {
76 old_value = db_get_value(addr, size, false);
77 db_printsym(addr, DB_STGY_ANY);
78 db_printf("\t\t%#8lr\t=\t%#8lr\n", (long)old_value,(long)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 }
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