bsd/dev/ppc/stubs.c

   1 /*
   2  * Copyright (c) 2000 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/buf.h>
  31 #include <sys/ioctl.h>
  32 #include <sys/tty.h>
  33 #include <sys/conf.h>
  34 #include <sys/proc.h>
  35 #include <sys/user.h>
  36 #include <kern/thread.h>
  37 #include <kern/thread_act.h>
  38 #include <kern/task.h>
  39 #include <vm/vm_map.h>
  40
  41
  42 /*
  43  * copy a null terminated string from the kernel address space into
  44  * the user address space.
  45  *   - if the user is denied write access, return EFAULT.
  46  *   - if the end of string isn't found before
  47  *     maxlen bytes are copied,  return ENAMETOOLONG,
  48  *     indicating an incomplete copy.
  49  *   - otherwise, return 0, indicating success.
  50  * the number of bytes copied is always returned in lencopied.
  51  */
  52 int
  53 copyoutstr(from, to, maxlen, lencopied)
  54     void * from, * to;
  55     size_t maxlen, *lencopied;
  56 {
  57         int slen,len,error=0;
  58
  59         /* XXX Must optimize this */
  60
  61         slen = strlen(from) + 1;
  62         if (slen > maxlen)
  63                 error = ENAMETOOLONG;
  64
  65         len = min(maxlen,slen);
  66         if (copyout(from, to, len))
  67                 error = EFAULT;
  68         *lencopied = len;
  69
  70         return error;
  71 }
  72
  73
  74 /*
  75  * copy a null terminated string from one point to another in
  76  * the kernel address space.
  77  *   - no access checks are performed.
  78  *   - if the end of string isn't found before
  79  *     maxlen bytes are copied,  return ENAMETOOLONG,
  80  *     indicating an incomplete copy.
  81  *   - otherwise, return 0, indicating success.
  82  * the number of bytes copied is always returned in lencopied.
  83  */
  84 /* from ppc/fault_copy.c -Titan1T4 VERSION  */
  85 int
  86 copystr(vfrom, vto, maxlen, lencopied)
  87     register void * vfrom, *vto;
  88     size_t maxlen, *lencopied;
  89 {
  90     register unsigned l;
  91     int error;
  92 caddr_t from, to;
  93
  94         from = vfrom;
  95         to = vto;
  96     for (l = 0; l < maxlen; l++)
  97         if ((*to++ = *from++) == '\0') {
  98             if (lencopied)
  99                 *lencopied = l + 1;
 100             return 0;
 101         }
 102     if (lencopied)
 103         *lencopied = maxlen;
 104     return ENAMETOOLONG;
 105 }
 106
 107 int copywithin(src, dst, count)
 108 void  * src, *dst;
 109 size_t count;
 110 {
 111         bcopy(src,dst,count);
 112         return 0;
 113 }
 114
 115 struct unix_syscallargs {
 116         int flavor;
 117         int r3;
 118         int arg1, arg2,arg3,arg4,arg5,arg6,arg7;
 119 };
 120
 121 set_bsduthreadargs(thread_t th, void * pcb, struct unix_syscallargs * sarg)
 122 {
 123 struct uthread * ut;
 124
 125         ut = get_bsdthread_info(th);
 126         ut->uu_ar0 = (int *)pcb;
 127
 128         if (sarg->flavor)
 129         {
 130         ut->uu_arg[0] = sarg->arg1;
 131         ut->uu_arg[1] = sarg->arg2;
 132         ut->uu_arg[2] = sarg->arg3;
 133         ut->uu_arg[3] = sarg->arg4;
 134         ut->uu_arg[4] = sarg->arg5;
 135         ut->uu_arg[5] = sarg->arg6;
 136         ut->uu_arg[7] = sarg->arg7;
 137         }
 138         else
 139         {
 140         ut->uu_arg[0] = sarg->r3;
 141         ut->uu_arg[1] = sarg->arg1;
 142         ut->uu_arg[2] = sarg->arg2;
 143         ut->uu_arg[3] = sarg->arg3;
 144         ut->uu_arg[4] = sarg->arg4;
 145         ut->uu_arg[5] = sarg->arg5;
 146         ut->uu_arg[6] = sarg->arg6;
 147         ut->uu_arg[7] = sarg->arg7;
 148         }
 149
 150         return(1);
 151 }
 152
 153 void *
 154 get_bsduthreadarg(thread_t th)
 155 {
 156 struct uthread *ut;
 157         ut = get_bsdthread_info(th);
 158         return((void *)(ut->uu_arg));
 159 }
 160
 161 int *
 162 get_bsduthreadrval(thread_act_t th)
 163 {
 164 struct uthread *ut;
 165         ut = get_bsdthread_info(th);
 166         return(&ut->uu_rval[0]);
 167 }
 168