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 extern void     *get_bsduthreadarg(thread_t);
  46 extern int      *get_bsduthreadrval(thread_t);
  47
  48 /*
  49  * copy a null terminated string from one point to another in
  50  * the kernel address space.
  51  *   - no access checks are performed.
  52  *   - if the end of string isn't found before
  53  *     maxlen bytes are copied,  return ENAMETOOLONG,
  54  *     indicating an incomplete copy.
  55  *   - otherwise, return 0, indicating success.
  56  * the number of bytes copied is always returned in lencopied.
  57  */
  58 /* from ppc/fault_copy.c -Titan1T4 VERSION  */
  59 int
  60 copystr(const void *vfrom, void *vto, size_t maxlen, size_t *lencopied)
  61 {
  62     register unsigned l;
  63         const char *from;
  64         char *to;
  65
  66         from = vfrom;
  67         to = vto;
  68     for (l = 0; l < maxlen; l++)
  69         if ((*to++ = *from++) == '\0') {
  70             if (lencopied)
  71                 *lencopied = l + 1;
  72             return 0;
  73         }
  74     if (lencopied)
  75         *lencopied = maxlen;
  76     return ENAMETOOLONG;
  77 }
  78
  79 int copywithin(src, dst, count)
  80 void  * src, *dst;
  81 size_t count;
  82 {
  83         bcopy(src,dst,count);
  84         return 0;
  85 }
  86
  87 void *
  88 get_bsduthreadarg(thread_t th)
  89 {
  90 struct uthread *ut;
  91         ut = get_bsdthread_info(th);
  92         return((void *)(ut->uu_arg));
  93 }
  94
  95 int *
  96 get_bsduthreadrval(thread_t th)
  97 {
  98 struct uthread *ut;
  99         ut = get_bsdthread_info(th);
 100         return(&ut->uu_rval[0]);
 101 }
 102