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 [email protected]
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 #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
db_write_cmd(db_expr_t address,bool have_addr,db_expr_t count,char * modif)46 db_write_cmd(db_expr_t address, bool have_addr, db_expr_t count,
47 char * modif)
48 {
49 db_addr_t addr;
50 db_expr_t old_value;
51 db_expr_t new_value;
52 int size;
53 bool wrote_one = false;
54
55 addr = (db_addr_t) address;
56
57 switch (modif[0]) {
58 case 'b':
59 size = 1;
60 break;
61 case 'h':
62 size = 2;
63 break;
64 case 'l':
65 case '\0':
66 size = 4;
67 break;
68 default:
69 db_error("Unknown size\n");
70 return;
71 }
72
73 while (db_expression(&new_value)) {
74 old_value = db_get_value(addr, size, false);
75 db_printsym(addr, DB_STGY_ANY);
76 db_printf("\t\t%#8lr\t=\t%#8lr\n", (long)old_value,(long)new_value);
77 db_put_value(addr, size, new_value);
78 addr += size;
79
80 wrote_one = true;
81 }
82
83 if (!wrote_one)
84 db_error("Nothing written.\n");
85
86 db_next = addr;
87 db_prev = addr - size;
88
89 db_skip_to_eol();
90 }
91