bsd/dev/ppc/stubs.c

   1 /*
   2  * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 /*
  24  * Copyright (c) 1997 by Apple Computer, Inc., all rights reserved
  25  * Copyright (c) 1993 NeXT Computer, Inc.
  26  *
  27  */
  28
  29 #include <sys/param.h>
  30 #include <sys/systm.h>
  31 #include <sys/ioctl.h>
  32 #include <sys/tty.h>
  33 #include <sys/conf.h>
  34 #include <sys/proc.h>
  35 #include <sys/user.h>
  36 #include <kern/thread.h>
  37 #include <kern/task.h>
  38 #include <vm/vm_map.h>
  39
  40
  41 /*
  42  * copy a null terminated string from one point to another in
  43  * the kernel address space.
  44  *   - no access checks are performed.
  45  *   - if the end of string isn't found before
  46  *     maxlen bytes are copied,  return ENAMETOOLONG,
  47  *     indicating an incomplete copy.
  48  *   - otherwise, return 0, indicating success.
  49  * the number of bytes copied is always returned in lencopied.
  50  */
  51 /* from ppc/fault_copy.c -Titan1T4 VERSION  */
  52 int
  53 copystr(const void *vfrom, void *vto, size_t maxlen, size_t *lencopied)
  54 {
  55     register unsigned l;
  56         caddr_t from, to;
  57
  58         from = vfrom;
  59         to = vto;
  60     for (l = 0; l < maxlen; l++)
  61         if ((*to++ = *from++) == '\0') {
  62             if (lencopied)
  63                 *lencopied = l + 1;
  64             return 0;
  65         }
  66     if (lencopied)
  67         *lencopied = maxlen;
  68     return ENAMETOOLONG;
  69 }
  70
  71 int copywithin(src, dst, count)
  72 void  * src, *dst;
  73 size_t count;
  74 {
  75         bcopy(src,dst,count);
  76         return 0;
  77 }
  78
  79 void *
  80 get_bsduthreadarg(thread_t th)
  81 {
  82 struct uthread *ut;
  83         ut = get_bsdthread_info(th);
  84         return((void *)(ut->uu_arg));
  85 }
  86
  87 int *
  88 get_bsduthreadrval(thread_t th)
  89 {
  90 struct uthread *ut;
  91         ut = get_bsdthread_info(th);
  92         return(&ut->uu_rval[0]);
  93 }
  94