source: rtems/c/src/exec/score/cpu/m68k/rtems.s @ 38ffa0c

4.104.114.84.95
Last change on this file since 38ffa0c was ac7d5ef0, checked in by Joel Sherrill <joel.sherrill@…>, on 05/11/95 at 17:39:37

Initial revision

  • Property mode set to 100644
File size: 1.1 KB
Line 
1/*  rtems.s
2 *
3 *  This file contains the single entry point code for
4 *  the m68k implementation of RTEMS.
5 *
6 *  COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
7 *  On-Line Applications Research Corporation (OAR).
8 *  All rights assigned to U.S. Government, 1994.
9 *
10 *  This material may be reproduced by or for the U.S. Government pursuant
11 *  to the copyright license under the clause at DFARS 252.227-7013.  This
12 *  notice must appear in all copies of this file and its derivatives.
13 *
14 *  $Id$
15 */
16
17
18#include <asm.h>
19
20/*
21 *  There seems to be no reason to have two versions of this.
22 *  The following version should work across the entire family.
23 *  The worst assumption is that gcc will put entry in a scratch
24 *  register and not screw up the stack.
25 *
26 *  NOTE:  This is a 68020 version:
27 *
28 *    jmpl    @(%%d0:l:4)@(__Entry_points)
29 */
30
31        EXTERN (_Entry_points)
32
33        BEGIN_CODE
34
35        .align  4
36        .global SYM (RTEMS)
37
38SYM (RTEMS):
39        moveal    SYM (_Entry_points), a0
40        lsll      #2, d0
41        addal     d0, a0
42        moveal    @(a0),a0
43        jmpl      @(a0)
44
45        END_CODE
46END
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