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/param.h> 34 35 #include <ddb/ddb.h> 36 #include <ddb/db_access.h> 37 #include <ddb/db_command.h> 38 #include <ddb/db_sym.h> 39 40 /* 41 * Write to file. 42 */ 43 /*ARGSUSED*/ 44 void 45 db_write_cmd(db_expr_t address, bool have_addr, db_expr_t count, 46 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 = false; 53 54 addr = (db_addr_t) address; 55 56 switch (modif[0]) { 57 case 'b': 58 size = 1; 59 break; 60 case 'h': 61 size = 2; 62 break; 63 case 'l': 64 case '\0': 65 size = 4; 66 break; 67 default: 68 db_error("Unknown size\n"); 69 return; 70 } 71 72 while (db_expression(&new_value)) { 73 old_value = db_get_value(addr, size, false); 74 db_printsym(addr, DB_STGY_ANY); 75 db_printf("\t\t%#8lr\t=\t%#8lr\n", (long)old_value,(long)new_value); 76 db_put_value(addr, size, new_value); 77 addr += size; 78 79 wrote_one = true; 80 } 81 82 if (!wrote_one) 83 db_error("Nothing written.\n"); 84 85 db_next = addr; 86 db_prev = addr - size; 87 88 db_skip_to_eol(); 89 } 90