db_write_cmd.c

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    1 /*      $NetBSD: db_write_cmd.c,v 1.16 2002/02/15 07:33:54 simonb 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@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 1.16 2002/02/15 07:33:54 simonb 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(db_expr_t address, boolean_t have_addr, db_expr_t count,
   53     char *modif)
   54 {
   55         db_addr_t       addr;
   56         db_expr_t       old_value;
   57         db_expr_t       new_value;
   58         int             size;
   59         boolean_t       wrote_one = FALSE;
   60 
   61         addr = (db_addr_t) address;
   62 
   63         switch (modif[0]) {
   64         case 'b':
   65                 size = 1;
   66                 break;
   67         case 'h':
   68                 size = 2;
   69                 break;
   70         case 'l':
   71         case '\0':
   72                 size = 4;
   73                 break;
   74         default:
   75                 size = -1;
   76                 db_error("Unknown size\n");
   77                 /*NOTREACHED*/
   78         }
   79 
   80         while (db_expression(&new_value)) {
   81                 old_value = db_get_value(addr, size, FALSE);
   82                 db_printsym(addr, DB_STGY_ANY, db_printf);
   83                 db_printf("\t\t%s = ", db_num_to_str(old_value));
   84                 db_printf("%s\n", db_num_to_str(new_value));
   85                 db_put_value(addr, size, new_value);
   86                 addr += size;
   87 
   88                 wrote_one = TRUE;
   89         }
   90 
   91         if (!wrote_one) {
   92                 db_error("Nothing written.\n");
   93                 /*NOTREACHED*/
   94         }
   95 
   96         db_next = addr;
   97         db_prev = addr - size;
   98 
   99         db_skip_to_eol();
  100 }

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FreeBSD/Linux Kernel Cross Reference sys/ddb/db_write_cmd.c

FreeBSD/Linux Kernel Cross Reference
sys/ddb/db_write_cmd.c