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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) 2013 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Nick Hudson
      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 $")
     35 
     36 	.import	_GLOBAL_OFFSET_TABLE_
     37 	.hidden	___start
     38 
     39 STRONG_ALIAS(__start,_start)
     40 
     41 /*
     42  * void _start(struct ps_strings *ps_strings,
     43  *    void (*cleanup)(void),
     44  *    const Obj_Entry *obj);
     45  */
     46 _ENTRY(_start)
     47 	.callinfo frame=0, calls
     48 	.entry
     49 
     50 	bl      L$lpc, %r27
     51 	depi    0, 31, 2, %r27
     52 L$lpc:	addil   L'_GLOBAL_OFFSET_TABLE_ - ($PIC_pcrel$0 - 8), %r27
     53 	ldo     R'_GLOBAL_OFFSET_TABLE_ - ($PIC_pcrel$0 - 12)(%r1),%r27
     54 	copy	%r27, %r19
     55 
     56 	/*
     57 	 * void ___start(void (*cleanup)(void),
     58 	 *    struct ps_strings *ps_strings);
     59 	 */
     60 	copy	%arg0, %arg2		; ps_strings -> tmp
     61 	copy	%arg1, %arg0		; cleanup -> arg0
     62 	b	___start
     63 	copy	%arg2, %arg1		; ps_strings -> arg1
     64 
     65 EXIT(_start)
     66