xref: /src/lib/csu/arch/sh3/crt0.S

/* $NetBSD: crt0.S,v 1.6 2016/08/29 21:27:03 uwe Exp $ */

/*
 * Copyright (c) 1998 Christos Zoulas
 * Copyright (c) 1995 Christopher G. Demetriou
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *          This product includes software developed for the
 *          NetBSD Project.  See http://www.NetBSD.org/ for
 *          information about NetBSD.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * <<Id: LICENSE,v 1.2 2000/06/14 15:57:33 cgd Exp>>
 */

#include <machine/asm.h>

RCSID("$NetBSD: crt0.S,v 1.6 2016/08/29 21:27:03 uwe Exp $")

STRONG_ALIAS(_start,__start)

/*
 * Kernel setregs() passes arguments for the 6-argument version of
 * ___start (but with 5th and 6th in registers, to avoid copyout).
 * Since we now use 3-argument version of ___start - that obtains
 * argc, argv and environ from ps_strings - move its arguments to
 * proper registers.
 */
_ENTRY(__start)
	mov.l	.L___start, r0
	mov	r7, r4		! void (*cleanup)(void)
	mov	r8, r5		! const Obj_Entry *obj
1:	JUMP	r0
	 mov	r9, r6		! struct ps_strings *ps_strings

	.p2align 2
.L___start:
	CALL_DATUM_LOCAL(___start, 1b)