copystr.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-4-Clause
    3  *
    4  * Copyright (C) 1995 Wolfgang Solfrank.
    5  * Copyright (C) 1995 TooLs GmbH.
    6  * All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions and the following disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  * 3. All advertising materials mentioning features or use of this software
   17  *    must display the following acknowledgement:
   18  *      This product includes software developed by TooLs GmbH.
   19  * 4. The name of TooLs GmbH may not be used to endorse or promote products
   20  *    derived from this software without specific prior written permission.
   21  *
   22  * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
   23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   25  * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   26  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   27  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
   28  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
   29  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
   30  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
   31  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   32  *
   33  *      $NetBSD: copystr.c,v 1.3 2000/06/08 06:47:17 kleink Exp $
   34  */
   35 
   36 #include <sys/cdefs.h>
   37 __FBSDID("$FreeBSD: releng/12.0/sys/powerpc/powerpc/copystr.c 326261 2017-11-27 15:09:59Z pfg $");
   38 
   39 #include <sys/param.h>
   40 #include <sys/errno.h>
   41 #include <sys/systm.h>
   42 
   43 /*
   44  * Emulate copyinstr.
   45  */
   46 int
   47 copystr(kfaddr, kdaddr, len, done)
   48         const void *kfaddr;
   49         void *kdaddr;
   50         size_t len;
   51         size_t *done;
   52 {
   53         const u_char *kfp = kfaddr;
   54         u_char *kdp = kdaddr;
   55         size_t l;
   56         int rv;
   57         
   58         rv = ENAMETOOLONG;
   59         for (l = 0; len-- > 0; l++) {
   60                 if (!(*kdp++ = *kfp++)) {
   61                         l++;
   62                         rv = 0;
   63                         break;
   64                 }
   65         }
   66         if (done != NULL) {
   67                 *done = l;
   68         }
   69         return rv;
   70 }

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FreeBSD/Linux Kernel Cross Reference sys/powerpc/powerpc/copystr.c

FreeBSD/Linux Kernel Cross Reference
sys/powerpc/powerpc/copystr.c