NAME
        StackSwap - EXEC supported method of replacing task's stack      (V37)

   SYNOPSIS
        StackSwap(newStack)
                  A0

        VOID StackSwap(struct stackswapstruct *);

   FUNCTION
        This function will, in an EXEC supported manner, swap the
        stack of your task with the given values in StackSwap.
        The stackswapstruct structure will then contain the values
        of the old stack such that the old stack can be restored.
        This function is new in V37.

   NOTE
        If you do a stack swap, only the new stack is set up.
        This function does not copy the stack or do anything else
        other than set up the new stack for the task.  It is
        generally required that you restore your stack before
        exiting.

   INPUTS
        newStack - A structure that contains the values for the
                new upper and lower stack bounds and the new stack
                pointer.  This structure will have its values
                replaced by those in you task such that you can
                restore the stack later.

   RESULTS
        newStack - The structure will now contain the old stack.
                This means that StackSwap(foo); StackSwap(foo);
                will effectively do nothing.

   SEE ALSO
        addtask(), remtask(), exec/tasks.h