blow.c

RTEMS (Real-Time Executive for Multiprocessor Systems) is a free open source real-time operating sys

/*  task1.c
 *
 *  This set of three tasks do some simple task switching for about
 *  15 seconds and then call a routine to "blow the stack".
 *
 *  COPYRIGHT (c) 1989-1999.
 *  On-Line Applications Research Corporation (OAR).
 *
 *  The license and distribution terms for this file may be
 *  found in the file LICENSE in this distribution or at
 *  http://www.rtems.com/license/LICENSE.
 *
 *  $Id: blow.c,v 1.8.8.1 2003/09/04 18:46:13 joel Exp $
 */

#include <rtems.h>

void b() {}

void blow_stack( void )
{
  volatile unsigned32 *low, *high;
  unsigned char *area;

b();
  /*
   *  Destroy the first and last 16 bytes of our stack... Hope it
   *  does not cause problems :)
   */

 area = (unsigned char *)_Thread_Executing->Start.Initial_stack.area;

 low  = (volatile unsigned32 *) (area + HEAP_OVERHEAD);
 high = (volatile unsigned32 *)
            (area + _Thread_Executing->Start.Initial_stack.size - 16);


 low[0] = 0x11111111;
 low[1] = 0x22222222;
 low[2] = 0x33333333;
 low[3] = 0x44444444;

 high[0] = 0x55555555;
 high[1] = 0x66666666;
 high[2] = 0x77777777;
 high[3] = 0x88888888;

}