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crt0.S revision 1.6 
      1 /* $NetBSD: crt0.S,v 1.6 2016/08/29 21:27:03 uwe Exp $ */
      2 
      3 /*
      4  * Copyright (c) 1998 Christos Zoulas
      5  * Copyright (c) 1995 Christopher G. Demetriou
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *          This product includes software developed for the
     19  *          NetBSD Project.  See http://www.NetBSD.org/ for
     20  *          information about NetBSD.
     21  * 4. The name of the author may not be used to endorse or promote products
     22  *    derived from this software without specific prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     25  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     26  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     27  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     28  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     29  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     30  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     31  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     32  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     33  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     34  *
     35  * <<Id: LICENSE,v 1.2 2000/06/14 15:57:33 cgd Exp>>
     36  */
     37 
     38 #include <machine/asm.h>
     39 
     40 RCSID("$NetBSD: crt0.S,v 1.6 2016/08/29 21:27:03 uwe Exp $")
     41 
     42 STRONG_ALIAS(_start,__start)
     43 
     44 /*
     45  * Kernel setregs() passes arguments for the 6-argument version of
     46  * ___start (but with 5th and 6th in registers, to avoid copyout).
     47  * Since we now use 3-argument version of ___start - that obtains
     48  * argc, argv and environ from ps_strings - move its arguments to
     49  * proper registers.
     50  */
     51 _ENTRY(__start)
     52 	mov.l	.L___start, r0
     53 	mov	r7, r4		! void (*cleanup)(void)
     54 	mov	r8, r5		! const Obj_Entry *obj
     55 1:	JUMP	r0
     56 	 mov	r9, r6		! struct ps_strings *ps_strings
     57 
     58 	.p2align 2
     59 .L___start:
     60 	CALL_DATUM_LOCAL(___start, 1b)
     61