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 * $Id: db_write_cmd.c,v 1.4 1994/08/13 03:49:26 wollman Exp $ 27 */ 28 29 /* 30 * Author: David B. Golub, Carnegie Mellon University 31 * Date: 7/90 32 */ 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/proc.h> 37 #include <ddb/ddb.h> 38 39 #include <ddb/db_lex.h> 40 #include <ddb/db_access.h> 41 #include <ddb/db_command.h> 42 #include <ddb/db_sym.h> 43 44 /* 45 * Write to file. 46 */ 47 /*ARGSUSED*/ 48 void 49 db_write_cmd(address, have_addr, count, modif) 50 db_expr_t address; 51 boolean_t have_addr; 52 db_expr_t count; 53 char * modif; 54 { 55 register 56 db_addr_t addr; 57 register 58 db_expr_t old_value; 59 db_expr_t new_value; 60 register int size; 61 boolean_t wrote_one = FALSE; 62 63 addr = (db_addr_t) address; 64 65 switch (modif[0]) { 66 case 'b': 67 size = 1; 68 break; 69 case 'h': 70 size = 2; 71 break; 72 case 'l': 73 case '\0': 74 size = 4; 75 break; 76 default: 77 db_error("Unknown size\n"); 78 return; 79 } 80 81 while (db_expression(&new_value)) { 82 old_value = db_get_value(addr, size, FALSE); 83 db_printsym(addr, DB_STGY_ANY); 84 db_printf("\t\t%#8n\t=\t%#8n\n", old_value, 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 94 db_next = addr; 95 db_prev = addr - size; 96 97 db_skip_to_eol(); 98 } 99 100