LXR darwin-xnu/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  */
  51int
  52copystr(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
  70int copywithin(src, dst, count)
  71void  * src, *dst;
  72size_t count;
  73{
  74        bcopy(src,dst,count);
  75        return 0;
  76}
  77
  78void *
  79get_bsduthreadarg(thread_t th)
  80{
  81struct uthread *ut;
  82        ut = get_bsdthread_info(th);
  83        return((void *)(ut->uu_arg));
  84}
  85
  86int *
  87get_bsduthreadrval(thread_t th)
  88{
  89struct uthread *ut;
  90        ut = get_bsdthread_info(th);
  91        return(&ut->uu_rval[0]);
  92}
  93
  94