lib/libc/pc532/sys/Ovfork.s

   1 /*
   2  * Copyright (c) 1992 Helsinki University of Technology
   3  * All Rights Reserved.
   4  *
   5  * Permission to use, copy, modify and distribute this software and its
   6  * documentation is hereby granted, provided that both the copyright
   7  * notice and this permission notice appear in all copies of the
   8  * software, derivative works or modified versions, and any portions
   9  * thereof, and that both notices appear in supporting documentation.
  10  *
  11  * HELSINKI UNIVERSITY OF TECHNOLOGY ALLOWS FREE USE OF THIS SOFTWARE IN
  12  * ITS "AS IS" CONDITION. HELSINKI UNIVERSITY OF TECHNOLOGY DISCLAIMS ANY
  13  * LIABILITY OF ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE
  14  * USE OF THIS SOFTWARE.
  15  */
  16 /*
  17  * HISTORY
  18  * 29-Apr-92  Johannes Helander (jvh) at Helsinki University of Technology
  19  *      Created.
  20  *
  21  *      $Id: Ovfork.s,v 1.1 1993/09/17 18:43:48 phil Exp $
  22  */
  23
  24 #include <syscall.h>
  25 #include "SYS.h"
  26
  27 /*
  28  * r0 = pid of child in parent / pid of parent in child
  29  * r1 = 0 in parent, 1 in child
  30  */
  31 SYSCALL(vfork)
  32         cmpqd   0,r1
  33         beq     parent
  34         movqd   0,r0
  35 parent:
  36         ret     0