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 __FBSDID("$FreeBSD$"); 35 36 #include <sys/param.h> 37 38 #include <ddb/ddb.h> 39 #include <ddb/db_access.h> 40 #include <ddb/db_command.h> 41 #include <ddb/db_sym.h> 42 43 /* 44 * Write to file. 45 */ 46 /*ARGSUSED*/ 47 void 48 db_write_cmd(db_expr_t address, bool have_addr, db_expr_t count, 49 char * modif) 50 { 51 db_addr_t addr; 52 db_expr_t old_value; 53 db_expr_t new_value; 54 int size; 55 bool wrote_one = false; 56 57 addr = (db_addr_t) address; 58 59 switch (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 db_error("Unknown size\n"); 72 return; 73 } 74 75 while (db_expression(&new_value)) { 76 old_value = db_get_value(addr, size, false); 77 db_printsym(addr, DB_STGY_ANY); 78 db_printf("\t\t%#8lr\t=\t%#8lr\n", (long)old_value,(long)new_value); 79 db_put_value(addr, size, new_value); 80 addr += size; 81 82 wrote_one = true; 83 } 84 85 if (!wrote_one) 86 db_error("Nothing written.\n"); 87 88 db_next = addr; 89 db_prev = addr - size; 90 91 db_skip_to_eol(); 92 } 93