1 /* $NetBSD: db_write_cmd.c,v 1.26 2010/02/02 09:04:14 tron Exp $ */ 2 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 "AS IS" 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 * Author: David B. Golub, Carnegie Mellon University 29 * Date: 7/90 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: db_write_cmd.c,v 1.26 2010/02/02 09:04:14 tron Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/proc.h> 37 38 #include <ddb/ddb.h> 39 40 /* 41 * Write to file. 42 */ 43 /*ARGSUSED*/ 44 void 45 db_write_cmd(db_expr_t address, bool have_addr, 46 db_expr_t count, const char *modif) 47 { 48 db_addr_t addr; 49 db_expr_t old_value; 50 db_expr_t new_value; 51 int size; 52 bool wrote_one; 53 bool show_old_val; 54 55 addr = (db_addr_t) address; 56 wrote_one = false; 57 show_old_val = islower((unsigned char)modif[0]); 58 59 switch (tolower((unsigned char)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 size = -1; 72 db_error("Unknown size\n"); 73 /*NOTREACHED*/ 74 } 75 76 while (db_expression(&new_value)) { 77 db_printsym(addr, DB_STGY_ANY, db_printf); 78 if (show_old_val) { 79 old_value = db_get_value(addr, size, false); 80 db_printf("\t\t%s = ", db_num_to_str(old_value)); 81 db_printf("%s\n", db_num_to_str(new_value)); 82 } 83 else 84 db_printf("\t\t= %s\n", db_num_to_str(new_value)); 85 db_put_value(addr, size, new_value); 86 addr += size; 87 88 wrote_one = true; 89 } 90 91 if (!wrote_one) { 92 db_error("Nothing written.\n"); 93 /*NOTREACHED*/ 94 } 95 96 db_next = addr; 97 db_prev = addr - size; 98 99 db_skip_to_eol(); 100 } 101