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  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  * Copyright (c) 1997 by Apple Computer, Inc., all rights reserved
  24  * Copyright (c) 1993 NeXT Computer, Inc.
  25  *
  26  */
  27
  28 #include <sys/param.h>
  29 #include <sys/systm.h>
  30 #include <sys/ioctl.h>
  31 #include <sys/tty.h>
  32 #include <sys/conf.h>
  33 #include <sys/proc.h>
  34 #include <sys/user.h>
  35 #include <kern/thread.h>
  36 #include <kern/task.h>
  37 #include <vm/vm_map.h>
  38
  39
  40 /*
  41  * copy a null terminated string from one point to another in
  42  * the kernel address space.
  43  *   - no access checks are performed.
  44  *   - if the end of string isn't found before
  45  *     maxlen bytes are copied,  return ENAMETOOLONG,
  46  *     indicating an incomplete copy.
  47  *   - otherwise, return 0, indicating success.
  48  * the number of bytes copied is always returned in lencopied.
  49  */
  50 /* from ppc/fault_copy.c -Titan1T4 VERSION  */
  51 int
  52 copystr(const void *vfrom, void *vto, size_t maxlen, size_t *lencopied)
  53 {
  54     register unsigned l;
  55         caddr_t from, to;
  56
  57         from = vfrom;
  58         to = vto;
  59     for (l = 0; l < maxlen; l++)
  60         if ((*to++ = *from++) == '\0') {
  61             if (lencopied)
  62                 *lencopied = l + 1;
  63             return 0;
  64         }
  65     if (lencopied)
  66         *lencopied = maxlen;
  67     return ENAMETOOLONG;
  68 }
  69
  70 int copywithin(src, dst, count)
  71 void  * src, *dst;
  72 size_t count;
  73 {
  74         bcopy(src,dst,count);
  75         return 0;
  76 }
  77
  78 void *
  79 get_bsduthreadarg(thread_t th)
  80 {
  81 struct uthread *ut;
  82         ut = get_bsdthread_info(th);
  83         return((void *)(ut->uu_arg));
  84 }
  85
  86 int *
  87 get_bsduthreadrval(thread_t th)
  88 {
  89 struct uthread *ut;
  90         ut = get_bsdthread_info(th);
  91         return(&ut->uu_rval[0]);
  92 }
  93