The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 /*-
    2  * Copyright (C) 1995 Wolfgang Solfrank.
    3  * Copyright (C) 1995 TooLs GmbH.
    4  * All rights reserved.
    5  *
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions
    8  * are met:
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer.
   11  * 2. Redistributions in binary form must reproduce the above copyright
   12  *    notice, this list of conditions and the following disclaimer in the
   13  *    documentation and/or other materials provided with the distribution.
   14  * 3. All advertising materials mentioning features or use of this software
   15  *    must display the following acknowledgement:
   16  *      This product includes software developed by TooLs GmbH.
   17  * 4. The name of TooLs GmbH may not be used to endorse or promote products
   18  *    derived from this software without specific prior written permission.
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
   21  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   22  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   23  * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   24  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   25  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
   26  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
   27  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
   28  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
   29  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   30  *
   31  *      $NetBSD: copystr.c,v 1.3 2000/06/08 06:47:17 kleink Exp $
   32  */
   33 
   34 #include <sys/cdefs.h>
   35 __FBSDID("$FreeBSD: releng/9.1/sys/powerpc/powerpc/copystr.c 113038 2003-04-03 21:36:33Z obrien $");
   36 
   37 #include <sys/param.h>
   38 #include <sys/errno.h>
   39 #include <sys/systm.h>
   40 
   41 /*
   42  * Emulate copyinstr.
   43  */
   44 int
   45 copystr(kfaddr, kdaddr, len, done)
   46         const void *kfaddr;
   47         void *kdaddr;
   48         size_t len;
   49         size_t *done;
   50 {
   51         const u_char *kfp = kfaddr;
   52         u_char *kdp = kdaddr;
   53         size_t l;
   54         int rv;
   55         
   56         rv = ENAMETOOLONG;
   57         for (l = 0; len-- > 0; l++) {
   58                 if (!(*kdp++ = *kfp++)) {
   59                         l++;
   60                         rv = 0;
   61                         break;
   62                 }
   63         }
   64         if (done != NULL) {
   65                 *done = l;
   66         }
   67         return rv;
   68 }

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