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

/*-
 * Copyright (c) 2011 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Matt Thomas of 3am Software Foundry.
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``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 FOUNDATION OR CONTRIBUTORS
 * 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.
 */

#include <powerpc/asm.h>

RCSID("$NetBSD: crt0.S,v 1.5 2014/02/27 16:47:48 matt Exp $")

STRONG_ALIAS(_start,__start)

	.hidden ___start

#ifndef _LP64
	.weak	_SDA_BASE_
#endif

ENTRY_NOPROFILE(__start)
#ifndef _LP64
	bcl	20,31,1f
1:
	mflr	%r11
	/* SVR4 ABI says small data is in r13 */
	addis	%r13,%r11,_SDA_BASE_-1b@ha
	addi	%r13,%r13,_SDA_BASE_-1b@l
#endif

	mr	%r3,%r7		/* cleanup */
	mr	%r4,%r6		/* obj */
	mr	%r5,%r8		/* ps_strings */

#ifdef _LP64
	b	.___start
	nop
#else
	b	___start
#endif
END(__start)