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crt0.S revision 1.3 
      1  1.3    uwe /* $NetBSD: crt0.S,v 1.3 2012/01/29 23:27:24 uwe Exp $ */
      2  1.1  joerg 
      3  1.1  joerg /*
      4  1.1  joerg  * Copyright (c) 1998 Christos Zoulas
      5  1.1  joerg  * Copyright (c) 1995 Christopher G. Demetriou
      6  1.1  joerg  * All rights reserved.
      7  1.1  joerg  *
      8  1.1  joerg  * Redistribution and use in source and binary forms, with or without
      9  1.1  joerg  * modification, are permitted provided that the following conditions
     10  1.1  joerg  * are met:
     11  1.1  joerg  * 1. Redistributions of source code must retain the above copyright
     12  1.1  joerg  *    notice, this list of conditions and the following disclaimer.
     13  1.1  joerg  * 2. Redistributions in binary form must reproduce the above copyright
     14  1.1  joerg  *    notice, this list of conditions and the following disclaimer in the
     15  1.1  joerg  *    documentation and/or other materials provided with the distribution.
     16  1.1  joerg  * 3. All advertising materials mentioning features or use of this software
     17  1.1  joerg  *    must display the following acknowledgement:
     18  1.1  joerg  *          This product includes software developed for the
     19  1.1  joerg  *          NetBSD Project.  See http://www.NetBSD.org/ for
     20  1.1  joerg  *          information about NetBSD.
     21  1.1  joerg  * 4. The name of the author may not be used to endorse or promote products
     22  1.1  joerg  *    derived from this software without specific prior written permission.
     23  1.1  joerg  *
     24  1.1  joerg  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     25  1.1  joerg  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     26  1.1  joerg  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     27  1.1  joerg  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     28  1.1  joerg  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     29  1.1  joerg  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     30  1.1  joerg  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     31  1.1  joerg  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     32  1.1  joerg  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     33  1.1  joerg  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     34  1.1  joerg  *
     35  1.1  joerg  * <<Id: LICENSE,v 1.2 2000/06/14 15:57:33 cgd Exp>>
     36  1.1  joerg  */
     37  1.1  joerg 
     38  1.1  joerg #include <machine/asm.h>
     39  1.1  joerg 
     40  1.3    uwe RCSID("$NetBSD: crt0.S,v 1.3 2012/01/29 23:27:24 uwe Exp $")
     41  1.1  joerg 
     42  1.1  joerg STRONG_ALIAS(_start,__start)
     43  1.1  joerg 
     44  1.2    uwe /*
     45  1.2    uwe  * Kernel setregs() passes all arguments in registers to avoid
     46  1.2    uwe  * copyout.  This trampoline pushes 5th and 6th arguments into stack,
     47  1.2    uwe  * where C ABI expects them to be, and calls the real startup code
     48  1.2    uwe  * written in C.
     49  1.2    uwe  */
     50  1.1  joerg _ENTRY(__start)
     51  1.3    uwe 	mov.l	.L___start, r0
     52  1.2    uwe 	mov.l	r9, @-sp
     53  1.3    uwe 	braf	r0
     54  1.2    uwe 	 mov.l	r8, @-sp
     55  1.3    uwe 
     56  1.3    uwe 	.p2align 2
     57  1.3    uwe .L___start:	.long	_C_LABEL(___start)
     58