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crt0.S revision 1.6 
      1 /*-
      2  * Copyright (c) 2011 The NetBSD Foundation, Inc.
      3  * All rights reserved.
      4  *
      5  * This code is derived from software contributed to The NetBSD Foundation
      6  * by Matt Thomas of 3am Software Foundry.
      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  *
     17  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     18  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     19  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     20  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     21  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     22  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     23  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     24  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     25  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     26  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     27  * POSSIBILITY OF SUCH DAMAGE.
     28  */
     29 
     30 #include <powerpc/asm.h>
     31 
     32 RCSID("$NetBSD: crt0.S,v 1.6 2014/02/27 18:01:51 matt Exp $")
     33 
     34 STRONG_ALIAS(_start,__start)
     35 
     36 	.hidden ___start
     37 
     38 #ifndef _LP64
     39 	.weak	_SDA_BASE_
     40 #endif
     41 
     42 ENTRY_NOPROFILE(__start)
     43 #ifndef _LP64
     44 	bcl	20,31,1f
     45 1:
     46 	mflr	%r11
     47 	/* SVR4 ABI says small data is in r13 */
     48 	addis	%r13,%r11,_SDA_BASE_-1b@ha
     49 	addi	%r13,%r13,_SDA_BASE_-1b@l
     50 #endif
     51 
     52 	mr	%r3,%r7		/* cleanup */
     53 	mr	%r4,%r6		/* obj */
     54 	mr	%r5,%r8		/* ps_strings */
     55 
     56 	CALL(___start)
     57 END(__start)
     58