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db_write_cmd.c revision 1.15 
      1 /*	$NetBSD: db_write_cmd.c,v 1.15 2001/11/12 22:54:07 lukem 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 (at) 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 1.15 2001/11/12 22:54:07 lukem Exp $");
     34 
     35 #include <sys/param.h>
     36 #include <sys/proc.h>
     37 
     38 #include <machine/db_machdep.h>
     39 
     40 #include <ddb/db_lex.h>
     41 #include <ddb/db_access.h>
     42 #include <ddb/db_command.h>
     43 #include <ddb/db_sym.h>
     44 #include <ddb/db_extern.h>
     45 #include <ddb/db_output.h>
     46 
     47 /*
     48  * Write to file.
     49  */
     50 /*ARGSUSED*/
     51 void
     52 db_write_cmd(address, have_addr, count, modif)
     53 	db_expr_t	address;
     54 	boolean_t	have_addr;
     55 	db_expr_t	count;
     56 	char *		modif;
     57 {
     58 	db_addr_t	addr;
     59 	db_expr_t	old_value;
     60 	db_expr_t	new_value;
     61 	int		size;
     62 	boolean_t	wrote_one = FALSE;
     63 
     64 	addr = (db_addr_t) address;
     65 
     66 	switch (modif[0]) {
     67 	    case 'b':
     68 		size = 1;
     69 		break;
     70 	    case 'h':
     71 		size = 2;
     72 		break;
     73 	    case 'l':
     74 	    case '\0':
     75 		size = 4;
     76 		break;
     77 	    default:
     78 		size = -1;
     79 		db_error("Unknown size\n");
     80 		/*NOTREACHED*/
     81 	}
     82 
     83 	while (db_expression(&new_value)) {
     84 	    old_value = db_get_value(addr, size, FALSE);
     85 	    db_printsym(addr, DB_STGY_ANY, db_printf);
     86 	    db_printf("\t\t%s = ", db_num_to_str(old_value));
     87 	    db_printf("%s\n", db_num_to_str(new_value));
     88 	    db_put_value(addr, size, new_value);
     89 	    addr += size;
     90 
     91 	    wrote_one = TRUE;
     92 	}
     93 
     94 	if (!wrote_one) {
     95 	    db_error("Nothing written.\n");
     96 	    /*NOTREACHED*/
     97 	}
     98 
     99 	db_next = addr;
    100 	db_prev = addr - size;
    101 
    102 	db_skip_to_eol();
    103 }
    104 
    105