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