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crt0.S revision 1.2 
      1 /* $NetBSD: crt0.S,v 1.2 2018/11/26 17:37:45 joerg Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2014 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Cherry G. Mathew of Backyard Innovations, UK, Ltd.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <machine/asm.h>
     33 
     34 RCSID("$NetBSD: crt0.S,v 1.2 2018/11/26 17:37:45 joerg Exp $")
     35 
     36 STRONG_ALIAS(_start,__start)
     37 
     38 .proc __start
     39 .global __start
     40 
     41 /*
     42  * Called with:
     43  * 	in0 = cleanup
     44  * 	in1 = obj
     45  * 	in2 = ps_strings
     46  * 	in3 = sp
     47  * See: sys/arch/ia64/ia64/machdep.c:setregs()
     48  */
     49 
     50 __start:
     51 	.regstk 4, 0, 0, 0
     52 
     53 	mov sp = in3 /* Setup Memory Stack Pointer. */
     54 	mov in1 = in2 /* obj is no longer used. */
     55 	alloc r31 = ar.pfs, 3, 0, 0, 0 /* Adjust backingstore for ___start() */
     56 	br.call.sptk.many rp = ___start
     57 
     58