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Annotation of Net2/ddb/db_write_cmd.c, revision 1.1

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

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