NAME
        Supervisor -- trap to a short supervisor mode function

   SYNOPSIS
        result = Supervisor(userFunc)
        Rx                   A5

        ULONG Supervisor(void *);

   FUNCTION
        Allow a normal user-mode program to execute a short assembly language
        function in the supervisor mode of the processor.  Supervisor() does
        not modify or save registers; the user function has full access to the
        register set.   All rules that apply to interrupt code must be
        followed.  In addition, no system calls are permitted.  The function
        must end with an RTE instruction.

   EXAMPLE
                ;Obtain the Exception Vector base.  68010 or greater only!
                MOVECtrap:      movec.l VBR,d0  ;$4e7a,$0801
                                rte

   INPUTS
        userFunc - A pointer to a short assembly language function ending
                   in RTE.  The function has full access to the register set.

   RESULTS
        result   - Whatever values the userFunc left in the registers.

   SEE ALSO
        superstate(),userstate()