bsd/dev/ppc/stubs.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * Copyright (c) 1997 by Apple Computer, Inc., all rights reserved
  27  * Copyright (c) 1993 NeXT Computer, Inc.
  28  *
  29  */
  30
  31 #include <sys/param.h>
  32 #include <sys/systm.h>
  33 #include <sys/buf.h>
  34 #include <sys/ioctl.h>
  35 #include <sys/tty.h>
  36 #include <sys/conf.h>
  37 #include <sys/proc.h>
  38 #include <sys/user.h>
  39 #include <kern/thread.h>
  40 #include <kern/thread_act.h>
  41 #include <kern/task.h>
  42 #include <vm/vm_map.h>
  43
  44
  45 /*
  46  * copy a null terminated string from the kernel address space into
  47  * the user address space.
  48  *   - if the user is denied write access, return EFAULT.
  49  *   - if the end of string isn't found before
  50  *     maxlen bytes are copied,  return ENAMETOOLONG,
  51  *     indicating an incomplete copy.
  52  *   - otherwise, return 0, indicating success.
  53  * the number of bytes copied is always returned in lencopied.
  54  */
  55 int
  56 copyoutstr(from, to, maxlen, lencopied)
  57     void * from, * to;
  58     size_t maxlen, *lencopied;
  59 {
  60         int slen,len,error=0;
  61
  62         /* XXX Must optimize this */
  63
  64         slen = strlen(from) + 1;
  65         if (slen > maxlen)
  66                 error = ENAMETOOLONG;
  67
  68         len = min(maxlen,slen);
  69         if (copyout(from, to, len))
  70                 error = EFAULT;
  71         *lencopied = len;
  72
  73         return error;
  74 }
  75
  76
  77 /*
  78  * copy a null terminated string from one point to another in
  79  * the kernel address space.
  80  *   - no access checks are performed.
  81  *   - if the end of string isn't found before
  82  *     maxlen bytes are copied,  return ENAMETOOLONG,
  83  *     indicating an incomplete copy.
  84  *   - otherwise, return 0, indicating success.
  85  * the number of bytes copied is always returned in lencopied.
  86  */
  87 /* from ppc/fault_copy.c -Titan1T4 VERSION  */
  88 int
  89 copystr(vfrom, vto, maxlen, lencopied)
  90     register void * vfrom, *vto;
  91     size_t maxlen, *lencopied;
  92 {
  93     register unsigned l;
  94     int error;
  95 caddr_t from, to;
  96
  97         from = vfrom;
  98         to = vto;
  99     for (l = 0; l < maxlen; l++)
 100         if ((*to++ = *from++) == '\0') {
 101             if (lencopied)
 102                 *lencopied = l + 1;
 103             return 0;
 104         }
 105     if (lencopied)
 106         *lencopied = maxlen;
 107     return ENAMETOOLONG;
 108 }
 109
 110 int copywithin(src, dst, count)
 111 void  * src, *dst;
 112 size_t count;
 113 {
 114         bcopy(src,dst,count);
 115         return 0;
 116 }
 117
 118 struct unix_syscallargs {
 119         int flavor;
 120         int r3;
 121         int arg1, arg2,arg3,arg4,arg5,arg6,arg7;
 122 };
 123
 124 set_bsduthreadargs(thread_t th, void * pcb, struct unix_syscallargs * sarg)
 125 {
 126 struct uthread * ut;
 127
 128         ut = get_bsdthread_info(th);
 129         ut->uu_ar0 = (int *)pcb;
 130
 131         if (sarg->flavor)
 132         {
 133         ut->uu_arg[0] = sarg->arg1;
 134         ut->uu_arg[1] = sarg->arg2;
 135         ut->uu_arg[2] = sarg->arg3;
 136         ut->uu_arg[3] = sarg->arg4;
 137         ut->uu_arg[4] = sarg->arg5;
 138         ut->uu_arg[5] = sarg->arg6;
 139         ut->uu_arg[7] = sarg->arg7;
 140         }
 141         else
 142         {
 143         ut->uu_arg[0] = sarg->r3;
 144         ut->uu_arg[1] = sarg->arg1;
 145         ut->uu_arg[2] = sarg->arg2;
 146         ut->uu_arg[3] = sarg->arg3;
 147         ut->uu_arg[4] = sarg->arg4;
 148         ut->uu_arg[5] = sarg->arg5;
 149         ut->uu_arg[6] = sarg->arg6;
 150         ut->uu_arg[7] = sarg->arg7;
 151         }
 152
 153         return(1);
 154 }
 155
 156 void *
 157 get_bsduthreadarg(thread_t th)
 158 {
 159 struct uthread *ut;
 160         ut = get_bsdthread_info(th);
 161         return((void *)(ut->uu_arg));
 162 }
 163
 164 int *
 165 get_bsduthreadrval(thread_act_t th)
 166 {
 167 struct uthread *ut;
 168         ut = get_bsdthread_info(th);
 169         return(&ut->uu_rval[0]);
 170 }
 171