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 #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 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