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strcpy.c
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C/C++ Source or Header
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1996-09-28
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1KB
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36 lines
/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department.
*
* Redistribution and use in source and binary forms are permitted
* provided that: (1) source distributions retain this entire copyright
* notice and comment, and (2) distributions including binaries display
* the following acknowledgement: ``This product includes software
* developed by the University of California, Berkeley and its contributors''
* in the documentation or other materials provided with the distribution
* and in all advertising materials mentioning features or use of this
* software. Neither the name of the University nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#include "defs.h"
ENTRY(strcpy)
asm("
movl sp@(8),a0 /* a0 = fromaddr */
movl sp@(4),d0 /* return value is toaddr */
movl d0,a1 /* a1 = toaddr */
strcpyloop:
movb a0@+,a1@+ /* copy a byte */
jne strcpyloop /* copied non-null, keep going */
rts
");