bsd/dev/ppc/stubs.c

   1 /*
   2  * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_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. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * Copyright (c) 1997 by Apple Computer, Inc., all rights reserved
  30  * Copyright (c) 1993 NeXT Computer, Inc.
  31  *
  32  */
  33
  34 #include <sys/param.h>
  35 #include <sys/systm.h>
  36 #include <sys/ioctl.h>
  37 #include <sys/tty.h>
  38 #include <sys/conf.h>
  39 #include <sys/proc.h>
  40 #include <sys/user.h>
  41 #include <kern/thread.h>
  42 #include <kern/task.h>
  43 #include <vm/vm_map.h>
  44
  45
  46 /*
  47  * copy a null terminated string from one point to another in
  48  * the kernel address space.
  49  *   - no access checks are performed.
  50  *   - if the end of string isn't found before
  51  *     maxlen bytes are copied,  return ENAMETOOLONG,
  52  *     indicating an incomplete copy.
  53  *   - otherwise, return 0, indicating success.
  54  * the number of bytes copied is always returned in lencopied.
  55  */
  56 /* from ppc/fault_copy.c -Titan1T4 VERSION  */
  57 int
  58 copystr(const void *vfrom, void *vto, size_t maxlen, size_t *lencopied)
  59 {
  60     register unsigned l;
  61         caddr_t from, to;
  62
  63         from = vfrom;
  64         to = vto;
  65     for (l = 0; l < maxlen; l++)
  66         if ((*to++ = *from++) == '\0') {
  67             if (lencopied)
  68                 *lencopied = l + 1;
  69             return 0;
  70         }
  71     if (lencopied)
  72         *lencopied = maxlen;
  73     return ENAMETOOLONG;
  74 }
  75
  76 int copywithin(src, dst, count)
  77 void  * src, *dst;
  78 size_t count;
  79 {
  80         bcopy(src,dst,count);
  81         return 0;
  82 }
  83
  84 void *
  85 get_bsduthreadarg(thread_t th)
  86 {
  87 struct uthread *ut;
  88         ut = get_bsdthread_info(th);
  89         return((void *)(ut->uu_arg));
  90 }
  91
  92 int *
  93 get_bsduthreadrval(thread_t th)
  94 {
  95 struct uthread *ut;
  96         ut = get_bsdthread_info(th);
  97         return(&ut->uu_rval[0]);
  98 }
  99