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Annotation of sys/ddb/db_write_cmd.c, Revision 1.1.1.1

1.1       nbrk        1: /*     $OpenBSD: db_write_cmd.c,v 1.8 2006/03/13 06:23:20 jsg Exp $    */
                      2: /*     $NetBSD: db_write_cmd.c,v 1.6 1996/02/05 01:57:25 christos Exp $        */
                      3:
                      4: /*
                      5:  * Mach Operating System
                      6:  * Copyright (c) 1993,1992,1991,1990 Carnegie Mellon University
                      7:  * All Rights Reserved.
                      8:  *
                      9:  * Permission to use, copy, modify and distribute this software and its
                     10:  * documentation is hereby granted, provided that both the copyright
                     11:  * notice and this permission notice appear in all copies of the
                     12:  * software, derivative works or modified versions, and any portions
                     13:  * thereof, and that both notices appear in supporting documentation.
                     14:  *
                     15:  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
                     16:  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
                     17:  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
                     18:  *
                     19:  * Carnegie Mellon requests users of this software to return to
                     20:  *
                     21:  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
                     22:  *  School of Computer Science
                     23:  *  Carnegie Mellon University
                     24:  *  Pittsburgh PA 15213-3890
                     25:  *
                     26:  * any improvements or extensions that they make and grant Carnegie Mellon
                     27:  * the rights to redistribute these changes.
                     28:  *
                     29:  *     Author: David B. Golub,  Carnegie Mellon University
                     30:  *     Date:   7/90
                     31:  */
                     32:
                     33: #include <sys/param.h>
                     34: #include <sys/proc.h>
                     35:
                     36: #include <uvm/uvm_extern.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%#8n\t=\t%#8n\n", old_value, new_value);
                     84:            db_put_value(addr, size, new_value);
                     85:            addr += size;
                     86:
                     87:            wrote_one = TRUE;
                     88:        }
                     89:
                     90:        if (!wrote_one) {
                     91:            db_error("Nothing written.\n");
                     92:            /*NOTREACHED*/
                     93:        }
                     94:
                     95:        db_next = addr;
                     96:        db_prev = addr - size;
                     97:
                     98:        db_skip_to_eol();
                     99: }
                    100: