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      1  1.4       chs /*	$NetBSD: strcpy.S,v 1.4 2013/09/07 19:06:29 chs Exp $	*/
      2  1.1  christos 
      3  1.1  christos /*-
      4  1.1  christos  * Copyright (c) 1990 The Regents of the University of California.
      5  1.1  christos  * All rights reserved.
      6  1.1  christos  *
      7  1.1  christos  * This code is derived from software contributed to Berkeley by
      8  1.1  christos  * the Systems Programming Group of the University of Utah Computer
      9  1.1  christos  * Science Department.
     10  1.1  christos  *
     11  1.1  christos  * Redistribution and use in source and binary forms, with or without
     12  1.1  christos  * modification, are permitted provided that the following conditions
     13  1.1  christos  * are met:
     14  1.1  christos  * 1. Redistributions of source code must retain the above copyright
     15  1.1  christos  *    notice, this list of conditions and the following disclaimer.
     16  1.1  christos  * 2. Redistributions in binary form must reproduce the above copyright
     17  1.1  christos  *    notice, this list of conditions and the following disclaimer in the
     18  1.1  christos  *    documentation and/or other materials provided with the distribution.
     19  1.1  christos  * 3. Neither the name of the University nor the names of its contributors
     20  1.1  christos  *    may be used to endorse or promote products derived from this software
     21  1.1  christos  *    without specific prior written permission.
     22  1.1  christos  *
     23  1.1  christos  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  1.1  christos  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  1.1  christos  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  1.1  christos  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  1.1  christos  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  1.1  christos  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  1.1  christos  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  1.1  christos  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  1.1  christos  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  1.1  christos  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  1.1  christos  * SUCH DAMAGE.
     34  1.1  christos  */
     35  1.1  christos 
     36  1.1  christos #include <machine/asm.h>
     37  1.1  christos 
     38  1.1  christos #if defined(LIBC_SCCS) && !defined(lint)
     39  1.1  christos #if 0
     40  1.1  christos 	RCSID("from: @(#)strcpy.s	5.1 (Berkeley) 5/12/90")
     41  1.1  christos #else
     42  1.4       chs 	RCSID("$NetBSD: strcpy.S,v 1.4 2013/09/07 19:06:29 chs Exp $")
     43  1.1  christos #endif
     44  1.1  christos #endif /* LIBC_SCCS and not lint */
     45  1.1  christos 
     46  1.1  christos ENTRY(strcpy)
     47  1.2      matt 	movl	8(%sp),%a0		| a0 = fromaddr
     48  1.2      matt 	movl	4(%sp),%d0		| return value is toaddr
     49  1.1  christos 	movl	%d0,%a1			| a1 = toaddr
     50  1.4       chs .Lscloop:
     51  1.2      matt 	movb	(%a0)+,(%a1)+		| copy a byte
     52  1.4       chs 	jne	.Lscloop		| copied non-null, keep going
     53  1.1  christos #ifdef __SVR4_ABI__
     54  1.1  christos 	moveal	%d0,%a0
     55  1.1  christos #endif
     56  1.1  christos 	rts
     57  1.3      matt END(strcpy)
     58