Home | History | Annotate | Line # | Download | only in ddb
db_write_cmd.c revision 1.1 
      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 (at) 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 /*
     27  * HISTORY
     28  * $Log: db_write_cmd.c,v $
     29  * Revision 1.1  1993/03/21 09:45:37  cgd
     30  * Initial revision
     31  *
     32  * Revision 1.1  1992/03/25  21:45:42  pace
     33  * Initial revision
     34  *
     35  * Revision 2.4  91/02/05  17:07:35  mrt
     36  * 	Changed to new Mach copyright
     37  * 	[91/01/31  16:20:19  mrt]
     38  *
     39  * Revision 2.3  90/10/25  14:44:26  rwd
     40  * 	Changed db_write_cmd to print unsigned.
     41  * 	[90/10/19            rpd]
     42  *
     43  * Revision 2.2  90/08/27  21:53:54  dbg
     44  * 	Set db_prev and db_next instead of explicitly advancing dot.
     45  * 	[90/08/22            dbg]
     46  * 	Reflected changes in db_printsym()'s calling seq.
     47  * 	[90/08/20            af]
     48  * 	Warn user if nothing was written.
     49  * 	[90/08/07            dbg]
     50  * 	Created.
     51  * 	[90/07/25            dbg]
     52  *
     53  */
     54 /*
     55  *	Author: David B. Golub,  Carnegie Mellon University
     56  *	Date:	7/90
     57  */
     58 
     59 #include "param.h"
     60 #include "proc.h"
     61 #include <machine/db_machdep.h>
     62 
     63 #include <ddb/db_lex.h>
     64 #include <ddb/db_access.h>
     65 #include <ddb/db_command.h>
     66 #include <ddb/db_sym.h>
     67 
     68 /*
     69  * Write to file.
     70  */
     71 /*ARGSUSED*/
     72 void
     73 db_write_cmd(address, have_addr, count, modif)
     74 	db_expr_t	address;
     75 	boolean_t	have_addr;
     76 	db_expr_t	count;
     77 	char *		modif;
     78 {
     79 	register
     80 	db_addr_t	addr;
     81 	register
     82 	db_expr_t	old_value;
     83 	db_expr_t	new_value;
     84 	register int	size;
     85 	boolean_t	wrote_one = FALSE;
     86 
     87 	addr = (db_addr_t) address;
     88 
     89 	switch (modif[0]) {
     90 	    case 'b':
     91 		size = 1;
     92 		break;
     93 	    case 'h':
     94 		size = 2;
     95 		break;
     96 	    case 'l':
     97 	    case '\0':
     98 		size = 4;
     99 		break;
    100 	    default:
    101 		db_error("Unknown size\n");
    102 		return;
    103 	}
    104 
    105 	while (db_expression(&new_value)) {
    106 	    old_value = db_get_value(addr, size, FALSE);
    107 	    db_printsym(addr, DB_STGY_ANY);
    108 	    db_printf("\t\t%#8n\t=\t%#8n\n", old_value, new_value);
    109 	    db_put_value(addr, size, new_value);
    110 	    addr += size;
    111 
    112 	    wrote_one = TRUE;
    113 	}
    114 
    115 	if (!wrote_one)
    116 	    db_error("Nothing written.\n");
    117 
    118 	db_next = addr;
    119 	db_prev = addr - size;
    120 
    121 	db_skip_to_eol();
    122 }
    123 
    124