Annotation of sys/ddb/db_write_cmd.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: db_write_cmd.c,v 1.8 2006/03/13 06:23:20 jsg Exp $ */
2: /* $NetBSD: db_write_cmd.c,v 1.6 1996/02/05 01:57:25 christos Exp $ */
3:
4: /*
5: * Mach Operating System
6: * Copyright (c) 1993,1992,1991,1990 Carnegie Mellon University
7: * All Rights Reserved.
8: *
9: * Permission to use, copy, modify and distribute this software and its
10: * documentation is hereby granted, provided that both the copyright
11: * notice and this permission notice appear in all copies of the
12: * software, derivative works or modified versions, and any portions
13: * thereof, and that both notices appear in supporting documentation.
14: *
15: * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
16: * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
17: * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
18: *
19: * Carnegie Mellon requests users of this software to return to
20: *
21: * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
22: * School of Computer Science
23: * Carnegie Mellon University
24: * Pittsburgh PA 15213-3890
25: *
26: * any improvements or extensions that they make and grant Carnegie Mellon
27: * the rights to redistribute these changes.
28: *
29: * Author: David B. Golub, Carnegie Mellon University
30: * Date: 7/90
31: */
32:
33: #include <sys/param.h>
34: #include <sys/proc.h>
35:
36: #include <uvm/uvm_extern.h>
37:
38: #include <machine/db_machdep.h>
39:
40: #include <ddb/db_lex.h>
41: #include <ddb/db_access.h>
42: #include <ddb/db_command.h>
43: #include <ddb/db_sym.h>
44: #include <ddb/db_extern.h>
45: #include <ddb/db_output.h>
46:
47: /*
48: * Write to file.
49: */
50: /*ARGSUSED*/
51: void
52: db_write_cmd(db_expr_t address, boolean_t have_addr, db_expr_t count,
53: char *modif)
54: {
55: db_addr_t addr;
56: db_expr_t old_value;
57: db_expr_t new_value;
58: int size;
59: boolean_t wrote_one = FALSE;
60:
61: addr = (db_addr_t) address;
62:
63: switch (modif[0]) {
64: case 'b':
65: size = 1;
66: break;
67: case 'h':
68: size = 2;
69: break;
70: case 'l':
71: case '\0':
72: size = 4;
73: break;
74: default:
75: size = -1;
76: db_error("Unknown size\n");
77: /*NOTREACHED*/
78: }
79:
80: while (db_expression(&new_value)) {
81: old_value = db_get_value(addr, size, FALSE);
82: db_printsym(addr, DB_STGY_ANY, db_printf);
83: db_printf("\t\t%#8n\t=\t%#8n\n", old_value, new_value);
84: db_put_value(addr, size, new_value);
85: addr += size;
86:
87: wrote_one = TRUE;
88: }
89:
90: if (!wrote_one) {
91: db_error("Nothing written.\n");
92: /*NOTREACHED*/
93: }
94:
95: db_next = addr;
96: db_prev = addr - size;
97:
98: db_skip_to_eol();
99: }
100:
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